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HardenedBSD/sys/dev/sym/sym_hipd.c
Marius Strobl ae6d496358 sym(4): Add __diagused to nseg of getbaddrcb() 
The parameter is only used when compiling with INVARIANTS.
2023-08-18 16:33:27 +02:00

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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Device driver optimized for the Symbios/LSI 53C896/53C895A/53C1010
* PCI-SCSI controllers.
*
* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
*
* This driver also supports the following Symbios/LSI PCI-SCSI chips:
* 53C810A, 53C825A, 53C860, 53C875, 53C876, 53C885, 53C895,
* 53C810, 53C815, 53C825 and the 53C1510D is 53C8XX mode.
*
*
* This driver for FreeBSD-CAM is derived from the Linux sym53c8xx driver.
* Copyright (C) 1998-1999 Gerard Roudier
*
* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
* a port of the FreeBSD ncr driver to Linux-1.2.13.
*
* The original ncr driver has been written for 386bsd and FreeBSD by
* Wolfgang Stanglmeier <wolf@cologne.de>
* Stefan Esser <se@mi.Uni-Koeln.de>
* Copyright (C) 1994 Wolfgang Stanglmeier
*
* The initialisation code, and part of the code that addresses
* FreeBSD-CAM services is based on the aic7xxx driver for FreeBSD-CAM
* written by Justin T. Gibbs.
*
* Other major contributions:
*
* NVRAM detection and reading.
* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
*
*-----------------------------------------------------------------------------
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#define SYM_DRIVER_NAME "sym-1.6.5-20000902"
/* #define SYM_DEBUG_GENERIC_SUPPORT */
#include <sys/param.h>
/*
* Driver configuration options.
*/
#include "opt_sym.h"
#include <dev/sym/sym_conf.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/proc.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/atomic.h>
#include <sys/rman.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
/* Short and quite clear integer types */
typedef int8_t s8;
typedef int16_t s16;
typedef int32_t s32;
typedef u_int8_t u8;
typedef u_int16_t u16;
typedef u_int32_t u32;
/*
* Driver definitions.
*/
#include <dev/sym/sym_defs.h>
#include <dev/sym/sym_fw.h>
/*
* IA32 architecture does not reorder STORES and prevents
* LOADS from passing STORES. It is called `program order'
* by Intel and allows device drivers to deal with memory
* ordering by only ensuring that the code is not reordered
* by the compiler when ordering is required.
* Other architectures implement a weaker ordering that
* requires memory barriers (and also IO barriers when they
* make sense) to be used.
*/
#if defined __i386__ || defined __amd64__
#define MEMORY_BARRIER() do { ; } while(0)
#elif defined __powerpc__
#define MEMORY_BARRIER() __asm__ volatile("eieio; sync" : : : "memory")
#elif defined __arm__
#define MEMORY_BARRIER() dmb()
#elif defined __aarch64__
#define MEMORY_BARRIER() dmb(sy)
#elif defined __riscv
#define MEMORY_BARRIER() fence()
#else
#error "Not supported platform"
#endif
/*
* A la VMS/CAM-3 queue management.
*/
typedef struct sym_quehead {
struct sym_quehead *flink; /* Forward pointer */
struct sym_quehead *blink; /* Backward pointer */
} SYM_QUEHEAD;
#define sym_que_init(ptr) do { \
(ptr)->flink = (ptr); (ptr)->blink = (ptr); \
} while (0)
static __inline void __sym_que_add(struct sym_quehead * new,
struct sym_quehead * blink,
struct sym_quehead * flink)
{
flink->blink = new;
new->flink = flink;
new->blink = blink;
blink->flink = new;
}
static __inline void __sym_que_del(struct sym_quehead * blink,
struct sym_quehead * flink)
{
flink->blink = blink;
blink->flink = flink;
}
static __inline int sym_que_empty(struct sym_quehead *head)
{
return head->flink == head;
}
static __inline void sym_que_splice(struct sym_quehead *list,
struct sym_quehead *head)
{
struct sym_quehead *first = list->flink;
if (first != list) {
struct sym_quehead *last = list->blink;
struct sym_quehead *at = head->flink;
first->blink = head;
head->flink = first;
last->flink = at;
at->blink = last;
}
}
#define sym_que_entry(ptr, type, member) \
((type *)((char *)(ptr)-(size_t)(&((type *)0)->member)))
#define sym_insque(new, pos) __sym_que_add(new, pos, (pos)->flink)
#define sym_remque(el) __sym_que_del((el)->blink, (el)->flink)
#define sym_insque_head(new, head) __sym_que_add(new, head, (head)->flink)
static __inline struct sym_quehead *sym_remque_head(struct sym_quehead *head)
{
struct sym_quehead *elem = head->flink;
if (elem != head)
__sym_que_del(head, elem->flink);
else
elem = NULL;
return elem;
}
#define sym_insque_tail(new, head) __sym_que_add(new, (head)->blink, head)
/*
* This one may be useful.
*/
#define FOR_EACH_QUEUED_ELEMENT(head, qp) \
for (qp = (head)->flink; qp != (head); qp = qp->flink)
/*
* FreeBSD does not offer our kind of queue in the CAM CCB.
* So, we have to cast.
*/
#define sym_qptr(p) ((struct sym_quehead *) (p))
/*
* Simple bitmap operations.
*/
#define sym_set_bit(p, n) (((u32 *)(p))[(n)>>5] |= (1<<((n)&0x1f)))
#define sym_clr_bit(p, n) (((u32 *)(p))[(n)>>5] &= ~(1<<((n)&0x1f)))
#define sym_is_bit(p, n) (((u32 *)(p))[(n)>>5] & (1<<((n)&0x1f)))
/*
* Number of tasks per device we want to handle.
*/
#if SYM_CONF_MAX_TAG_ORDER > 8
#error "more than 256 tags per logical unit not allowed."
#endif
#define SYM_CONF_MAX_TASK (1<<SYM_CONF_MAX_TAG_ORDER)
/*
* Donnot use more tasks that we can handle.
*/
#ifndef SYM_CONF_MAX_TAG
#define SYM_CONF_MAX_TAG SYM_CONF_MAX_TASK
#endif
#if SYM_CONF_MAX_TAG > SYM_CONF_MAX_TASK
#undef SYM_CONF_MAX_TAG
#define SYM_CONF_MAX_TAG SYM_CONF_MAX_TASK
#endif
/*
* This one means 'NO TAG for this job'
*/
#define NO_TAG (256)
/*
* Number of SCSI targets.
*/
#if SYM_CONF_MAX_TARGET > 16
#error "more than 16 targets not allowed."
#endif
/*
* Number of logical units per target.
*/
#if SYM_CONF_MAX_LUN > 64
#error "more than 64 logical units per target not allowed."
#endif
/*
* Asynchronous pre-scaler (ns). Shall be 40 for
* the SCSI timings to be compliant.
*/
#define SYM_CONF_MIN_ASYNC (40)
/*
* Number of entries in the START and DONE queues.
*
* We limit to 1 PAGE in order to succeed allocation of
* these queues. Each entry is 8 bytes long (2 DWORDS).
*/
#ifdef SYM_CONF_MAX_START
#define SYM_CONF_MAX_QUEUE (SYM_CONF_MAX_START+2)
#else
#define SYM_CONF_MAX_QUEUE (7*SYM_CONF_MAX_TASK+2)
#define SYM_CONF_MAX_START (SYM_CONF_MAX_QUEUE-2)
#endif
#if SYM_CONF_MAX_QUEUE > PAGE_SIZE/8
#undef SYM_CONF_MAX_QUEUE
#define SYM_CONF_MAX_QUEUE PAGE_SIZE/8
#undef SYM_CONF_MAX_START
#define SYM_CONF_MAX_START (SYM_CONF_MAX_QUEUE-2)
#endif
/*
* For this one, we want a short name :-)
*/
#define MAX_QUEUE SYM_CONF_MAX_QUEUE
/*
* Active debugging tags and verbosity.
*/
#define DEBUG_ALLOC (0x0001)
#define DEBUG_PHASE (0x0002)
#define DEBUG_POLL (0x0004)
#define DEBUG_QUEUE (0x0008)
#define DEBUG_RESULT (0x0010)
#define DEBUG_SCATTER (0x0020)
#define DEBUG_SCRIPT (0x0040)
#define DEBUG_TINY (0x0080)
#define DEBUG_TIMING (0x0100)
#define DEBUG_NEGO (0x0200)
#define DEBUG_TAGS (0x0400)
#define DEBUG_POINTER (0x0800)
#if 0
static int sym_debug = 0;
#define DEBUG_FLAGS sym_debug
#else
/* #define DEBUG_FLAGS (0x0631) */
#define DEBUG_FLAGS (0x0000)
#endif
#define sym_verbose (np->verbose)
/*
* Insert a delay in micro-seconds and milli-seconds.
*/
static void UDELAY(int us) { DELAY(us); }
static void MDELAY(int ms) { while (ms--) UDELAY(1000); }
/*
* Simple power of two buddy-like allocator.
*
* This simple code is not intended to be fast, but to
* provide power of 2 aligned memory allocations.
* Since the SCRIPTS processor only supplies 8 bit arithmetic,
* this allocator allows simple and fast address calculations
* from the SCRIPTS code. In addition, cache line alignment
* is guaranteed for power of 2 cache line size.
*
* This allocator has been developed for the Linux sym53c8xx
* driver, since this O/S does not provide naturally aligned
* allocations.
* It has the advantage of allowing the driver to use private
* pages of memory that will be useful if we ever need to deal
* with IO MMUs for PCI.
*/
#define MEMO_SHIFT 4 /* 16 bytes minimum memory chunk */
#define MEMO_PAGE_ORDER 0 /* 1 PAGE maximum */
#if 0
#define MEMO_FREE_UNUSED /* Free unused pages immediately */
#endif
#define MEMO_WARN 1
#define MEMO_CLUSTER_SHIFT (PAGE_SHIFT+MEMO_PAGE_ORDER)
#define MEMO_CLUSTER_SIZE (1UL << MEMO_CLUSTER_SHIFT)
#define MEMO_CLUSTER_MASK (MEMO_CLUSTER_SIZE-1)
#define get_pages() malloc(MEMO_CLUSTER_SIZE, M_DEVBUF, M_NOWAIT)
#define free_pages(p) free((p), M_DEVBUF)
typedef u_long m_addr_t; /* Enough bits to bit-hack addresses */
typedef struct m_link { /* Link between free memory chunks */
struct m_link *next;
} m_link_s;
typedef struct m_vtob { /* Virtual to Bus address translation */
struct m_vtob *next;
bus_dmamap_t dmamap; /* Map for this chunk */
m_addr_t vaddr; /* Virtual address */
m_addr_t baddr; /* Bus physical address */
} m_vtob_s;
/* Hash this stuff a bit to speed up translations */
#define VTOB_HASH_SHIFT 5
#define VTOB_HASH_SIZE (1UL << VTOB_HASH_SHIFT)
#define VTOB_HASH_MASK (VTOB_HASH_SIZE-1)
#define VTOB_HASH_CODE(m) \
((((m_addr_t) (m)) >> MEMO_CLUSTER_SHIFT) & VTOB_HASH_MASK)
typedef struct m_pool { /* Memory pool of a given kind */
bus_dma_tag_t dev_dmat; /* Identifies the pool */
bus_dma_tag_t dmat; /* Tag for our fixed allocations */
m_addr_t (*getp)(struct m_pool *);
#ifdef MEMO_FREE_UNUSED
void (*freep)(struct m_pool *, m_addr_t);
#endif
#define M_GETP() mp->getp(mp)
#define M_FREEP(p) mp->freep(mp, p)
int nump;
m_vtob_s *(vtob[VTOB_HASH_SIZE]);
struct m_pool *next;
struct m_link h[MEMO_CLUSTER_SHIFT - MEMO_SHIFT + 1];
} m_pool_s;
static void *___sym_malloc(m_pool_s *mp, int size)
{
int i = 0;
int s = (1 << MEMO_SHIFT);
int j;
m_addr_t a;
m_link_s *h = mp->h;
if (size > MEMO_CLUSTER_SIZE)
return NULL;
while (size > s) {
s <<= 1;
++i;
}
j = i;
while (!h[j].next) {
if (s == MEMO_CLUSTER_SIZE) {
h[j].next = (m_link_s *) M_GETP();
if (h[j].next)
h[j].next->next = NULL;
break;
}
++j;
s <<= 1;
}
a = (m_addr_t) h[j].next;
if (a) {
h[j].next = h[j].next->next;
while (j > i) {
j -= 1;
s >>= 1;
h[j].next = (m_link_s *) (a+s);
h[j].next->next = NULL;
}
}
#ifdef DEBUG
printf("___sym_malloc(%d) = %p\n", size, (void *) a);
#endif
return (void *) a;
}
static void ___sym_mfree(m_pool_s *mp, void *ptr, int size)
{
int i = 0;
int s = (1 << MEMO_SHIFT);
m_link_s *q;
m_addr_t a, b;
m_link_s *h = mp->h;
#ifdef DEBUG
printf("___sym_mfree(%p, %d)\n", ptr, size);
#endif
if (size > MEMO_CLUSTER_SIZE)
return;
while (size > s) {
s <<= 1;
++i;
}
a = (m_addr_t) ptr;
while (1) {
#ifdef MEMO_FREE_UNUSED
if (s == MEMO_CLUSTER_SIZE) {
M_FREEP(a);
break;
}
#endif
b = a ^ s;
q = &h[i];
while (q->next && q->next != (m_link_s *) b) {
q = q->next;
}
if (!q->next) {
((m_link_s *) a)->next = h[i].next;
h[i].next = (m_link_s *) a;
break;
}
q->next = q->next->next;
a = a & b;
s <<= 1;
++i;
}
}
static void *__sym_calloc2(m_pool_s *mp, int size, char *name, int uflags)
{
void *p;
p = ___sym_malloc(mp, size);
if (DEBUG_FLAGS & DEBUG_ALLOC)
printf ("new %-10s[%4d] @%p.\n", name, size, p);
if (p)
bzero(p, size);
else if (uflags & MEMO_WARN)
printf ("__sym_calloc2: failed to allocate %s[%d]\n", name, size);
return p;
}
#define __sym_calloc(mp, s, n) __sym_calloc2(mp, s, n, MEMO_WARN)
static void __sym_mfree(m_pool_s *mp, void *ptr, int size, char *name)
{
if (DEBUG_FLAGS & DEBUG_ALLOC)
printf ("freeing %-10s[%4d] @%p.\n", name, size, ptr);
___sym_mfree(mp, ptr, size);
}
/*
* Default memory pool we donnot need to involve in DMA.
*/
/*
* With the `bus dma abstraction', we use a separate pool for
* memory we donnot need to involve in DMA.
*/
static m_addr_t ___mp0_getp(m_pool_s *mp)
{
m_addr_t m = (m_addr_t) get_pages();
if (m)
++mp->nump;
return m;
}
#ifdef MEMO_FREE_UNUSED
static void ___mp0_freep(m_pool_s *mp, m_addr_t m)
{
free_pages(m);
--mp->nump;
}
#endif
#ifdef MEMO_FREE_UNUSED
static m_pool_s mp0 = {0, 0, ___mp0_getp, ___mp0_freep};
#else
static m_pool_s mp0 = {0, 0, ___mp0_getp};
#endif
/*
* Actual memory allocation routine for non-DMAed memory.
*/
static void *sym_calloc(int size, char *name)
{
void *m;
/* Lock */
m = __sym_calloc(&mp0, size, name);
/* Unlock */
return m;
}
/*
* Actual memory allocation routine for non-DMAed memory.
*/
static void sym_mfree(void *ptr, int size, char *name)
{
/* Lock */
__sym_mfree(&mp0, ptr, size, name);
/* Unlock */
}
/*
* DMAable pools.
*/
/*
* With `bus dma abstraction', we use a separate pool per parent
* BUS handle. A reverse table (hashed) is maintained for virtual
* to BUS address translation.
*/
static void getbaddrcb(void *arg, bus_dma_segment_t *segs, int nseg __diagused,
int error)
{
bus_addr_t *baddr;
KASSERT(nseg == 1, ("%s: too many DMA segments (%d)", __func__, nseg));
baddr = (bus_addr_t *)arg;
if (error)
*baddr = 0;
else
*baddr = segs->ds_addr;
}
static m_addr_t ___dma_getp(m_pool_s *mp)
{
m_vtob_s *vbp;
void *vaddr = NULL;
bus_addr_t baddr = 0;
vbp = __sym_calloc(&mp0, sizeof(*vbp), "VTOB");
if (!vbp)
goto out_err;
if (bus_dmamem_alloc(mp->dmat, &vaddr,
BUS_DMA_COHERENT | BUS_DMA_WAITOK, &vbp->dmamap))
goto out_err;
bus_dmamap_load(mp->dmat, vbp->dmamap, vaddr,
MEMO_CLUSTER_SIZE, getbaddrcb, &baddr, BUS_DMA_NOWAIT);
if (baddr) {
int hc = VTOB_HASH_CODE(vaddr);
vbp->vaddr = (m_addr_t) vaddr;
vbp->baddr = (m_addr_t) baddr;
vbp->next = mp->vtob[hc];
mp->vtob[hc] = vbp;
++mp->nump;
return (m_addr_t) vaddr;
}
out_err:
if (vaddr)
bus_dmamem_free(mp->dmat, vaddr, vbp->dmamap);
if (vbp)
__sym_mfree(&mp0, vbp, sizeof(*vbp), "VTOB");
return 0;
}
#ifdef MEMO_FREE_UNUSED
static void ___dma_freep(m_pool_s *mp, m_addr_t m)
{
m_vtob_s **vbpp, *vbp;
int hc = VTOB_HASH_CODE(m);
vbpp = &mp->vtob[hc];
while (*vbpp && (*vbpp)->vaddr != m)
vbpp = &(*vbpp)->next;
if (*vbpp) {
vbp = *vbpp;
*vbpp = (*vbpp)->next;
bus_dmamap_unload(mp->dmat, vbp->dmamap);
bus_dmamem_free(mp->dmat, (void *) vbp->vaddr, vbp->dmamap);
__sym_mfree(&mp0, vbp, sizeof(*vbp), "VTOB");
--mp->nump;
}
}
#endif
static __inline m_pool_s *___get_dma_pool(bus_dma_tag_t dev_dmat)
{
m_pool_s *mp;
for (mp = mp0.next; mp && mp->dev_dmat != dev_dmat; mp = mp->next);
return mp;
}
static m_pool_s *___cre_dma_pool(bus_dma_tag_t dev_dmat)
{
m_pool_s *mp = NULL;
mp = __sym_calloc(&mp0, sizeof(*mp), "MPOOL");
if (mp) {
mp->dev_dmat = dev_dmat;
if (!bus_dma_tag_create(dev_dmat, 1, MEMO_CLUSTER_SIZE,
BUS_SPACE_MAXADDR_32BIT,
BUS_SPACE_MAXADDR,
NULL, NULL, MEMO_CLUSTER_SIZE, 1,
MEMO_CLUSTER_SIZE, 0,
NULL, NULL, &mp->dmat)) {
mp->getp = ___dma_getp;
#ifdef MEMO_FREE_UNUSED
mp->freep = ___dma_freep;
#endif
mp->next = mp0.next;
mp0.next = mp;
return mp;
}
}
if (mp)
__sym_mfree(&mp0, mp, sizeof(*mp), "MPOOL");
return NULL;
}
#ifdef MEMO_FREE_UNUSED
static void ___del_dma_pool(m_pool_s *p)
{
struct m_pool **pp = &mp0.next;
while (*pp && *pp != p)
pp = &(*pp)->next;
if (*pp) {
*pp = (*pp)->next;
bus_dma_tag_destroy(p->dmat);
__sym_mfree(&mp0, p, sizeof(*p), "MPOOL");
}
}
#endif
static void *__sym_calloc_dma(bus_dma_tag_t dev_dmat, int size, char *name)
{
struct m_pool *mp;
void *m = NULL;
/* Lock */
mp = ___get_dma_pool(dev_dmat);
if (!mp)
mp = ___cre_dma_pool(dev_dmat);
if (mp)
m = __sym_calloc(mp, size, name);
#ifdef MEMO_FREE_UNUSED
if (mp && !mp->nump)
___del_dma_pool(mp);
#endif
/* Unlock */
return m;
}
static void
__sym_mfree_dma(bus_dma_tag_t dev_dmat, void *m, int size, char *name)
{
struct m_pool *mp;
/* Lock */
mp = ___get_dma_pool(dev_dmat);
if (mp)
__sym_mfree(mp, m, size, name);
#ifdef MEMO_FREE_UNUSED
if (mp && !mp->nump)
___del_dma_pool(mp);
#endif
/* Unlock */
}
static m_addr_t __vtobus(bus_dma_tag_t dev_dmat, void *m)
{
m_pool_s *mp;
int hc = VTOB_HASH_CODE(m);
m_vtob_s *vp = NULL;
m_addr_t a = ((m_addr_t) m) & ~MEMO_CLUSTER_MASK;
/* Lock */
mp = ___get_dma_pool(dev_dmat);
if (mp) {
vp = mp->vtob[hc];
while (vp && (m_addr_t) vp->vaddr != a)
vp = vp->next;
}
/* Unlock */
if (!vp)
panic("sym: VTOBUS FAILED!\n");
return vp ? vp->baddr + (((m_addr_t) m) - a) : 0;
}
/*
* Verbs for DMAable memory handling.
* The _uvptv_ macro avoids a nasty warning about pointer to volatile
* being discarded.
*/
#define _uvptv_(p) ((void *)((vm_offset_t)(p)))
#define _sym_calloc_dma(np, s, n) __sym_calloc_dma(np->bus_dmat, s, n)
#define _sym_mfree_dma(np, p, s, n) \
__sym_mfree_dma(np->bus_dmat, _uvptv_(p), s, n)
#define sym_calloc_dma(s, n) _sym_calloc_dma(np, s, n)
#define sym_mfree_dma(p, s, n) _sym_mfree_dma(np, p, s, n)
#define _vtobus(np, p) __vtobus(np->bus_dmat, _uvptv_(p))
#define vtobus(p) _vtobus(np, p)
/*
* Print a buffer in hexadecimal format.
*/
static void sym_printb_hex (u_char *p, int n)
{
while (n-- > 0)
printf (" %x", *p++);
}
/*
* Same with a label at beginning and .\n at end.
*/
static void sym_printl_hex (char *label, u_char *p, int n)
{
printf ("%s", label);
sym_printb_hex (p, n);
printf (".\n");
}
/*
* Return a string for SCSI BUS mode.
*/
static const char *sym_scsi_bus_mode(int mode)
{
switch(mode) {
case SMODE_HVD: return "HVD";
case SMODE_SE: return "SE";
case SMODE_LVD: return "LVD";
}
return "??";
}
/*
* Some poor and bogus sync table that refers to Tekram NVRAM layout.
*/
#ifdef SYM_CONF_NVRAM_SUPPORT
static const u_char Tekram_sync[16] =
{25,31,37,43, 50,62,75,125, 12,15,18,21, 6,7,9,10};
#endif
/*
* Union of supported NVRAM formats.
*/
struct sym_nvram {
int type;
#define SYM_SYMBIOS_NVRAM (1)
#define SYM_TEKRAM_NVRAM (2)
#ifdef SYM_CONF_NVRAM_SUPPORT
union {
Symbios_nvram Symbios;
Tekram_nvram Tekram;
} data;
#endif
};
/*
* This one is hopefully useless, but actually useful. :-)
*/
#ifndef assert
#define assert(expression) { \
if (!(expression)) { \
(void)panic( \
"assertion \"%s\" failed: file \"%s\", line %d\n", \
#expression, \
__FILE__, __LINE__); \
} \
}
#endif
/*
* Some provision for a possible big endian mode supported by
* Symbios chips (never seen, by the way).
* For now, this stuff does not deserve any comments. :)
*/
#define sym_offb(o) (o)
#define sym_offw(o) (o)
/*
* Some provision for support for BIG ENDIAN CPU.
*/
#define cpu_to_scr(dw) htole32(dw)
#define scr_to_cpu(dw) le32toh(dw)
/*
* Access to the chip IO registers and on-chip RAM.
* We use the `bus space' interface under FreeBSD-4 and
* later kernel versions.
*/
#if defined(SYM_CONF_IOMAPPED)
#define INB_OFF(o) bus_read_1(np->io_res, (o))
#define INW_OFF(o) bus_read_2(np->io_res, (o))
#define INL_OFF(o) bus_read_4(np->io_res, (o))
#define OUTB_OFF(o, v) bus_write_1(np->io_res, (o), (v))
#define OUTW_OFF(o, v) bus_write_2(np->io_res, (o), (v))
#define OUTL_OFF(o, v) bus_write_4(np->io_res, (o), (v))
#else /* Memory mapped IO */
#define INB_OFF(o) bus_read_1(np->mmio_res, (o))
#define INW_OFF(o) bus_read_2(np->mmio_res, (o))
#define INL_OFF(o) bus_read_4(np->mmio_res, (o))
#define OUTB_OFF(o, v) bus_write_1(np->mmio_res, (o), (v))
#define OUTW_OFF(o, v) bus_write_2(np->mmio_res, (o), (v))
#define OUTL_OFF(o, v) bus_write_4(np->mmio_res, (o), (v))
#endif /* SYM_CONF_IOMAPPED */
#define OUTRAM_OFF(o, a, l) \
bus_write_region_1(np->ram_res, (o), (a), (l))
/*
* Common definitions for both bus space and legacy IO methods.
*/
#define INB(r) INB_OFF(offsetof(struct sym_reg,r))
#define INW(r) INW_OFF(offsetof(struct sym_reg,r))
#define INL(r) INL_OFF(offsetof(struct sym_reg,r))
#define OUTB(r, v) OUTB_OFF(offsetof(struct sym_reg,r), (v))
#define OUTW(r, v) OUTW_OFF(offsetof(struct sym_reg,r), (v))
#define OUTL(r, v) OUTL_OFF(offsetof(struct sym_reg,r), (v))
#define OUTONB(r, m) OUTB(r, INB(r) | (m))
#define OUTOFFB(r, m) OUTB(r, INB(r) & ~(m))
#define OUTONW(r, m) OUTW(r, INW(r) | (m))
#define OUTOFFW(r, m) OUTW(r, INW(r) & ~(m))
#define OUTONL(r, m) OUTL(r, INL(r) | (m))
#define OUTOFFL(r, m) OUTL(r, INL(r) & ~(m))
/*
* We normally want the chip to have a consistent view
* of driver internal data structures when we restart it.
* Thus these macros.
*/
#define OUTL_DSP(v) \
do { \
MEMORY_BARRIER(); \
OUTL (nc_dsp, (v)); \
} while (0)
#define OUTONB_STD() \
do { \
MEMORY_BARRIER(); \
OUTONB (nc_dcntl, (STD|NOCOM)); \
} while (0)
/*
* Command control block states.
*/
#define HS_IDLE (0)
#define HS_BUSY (1)
#define HS_NEGOTIATE (2) /* sync/wide data transfer*/
#define HS_DISCONNECT (3) /* Disconnected by target */
#define HS_WAIT (4) /* waiting for resource */
#define HS_DONEMASK (0x80)
#define HS_COMPLETE (4|HS_DONEMASK)
#define HS_SEL_TIMEOUT (5|HS_DONEMASK) /* Selection timeout */
#define HS_UNEXPECTED (6|HS_DONEMASK) /* Unexpected disconnect */
#define HS_COMP_ERR (7|HS_DONEMASK) /* Completed with error */
/*
* Software Interrupt Codes
*/
#define SIR_BAD_SCSI_STATUS (1)
#define SIR_SEL_ATN_NO_MSG_OUT (2)
#define SIR_MSG_RECEIVED (3)
#define SIR_MSG_WEIRD (4)
#define SIR_NEGO_FAILED (5)
#define SIR_NEGO_PROTO (6)
#define SIR_SCRIPT_STOPPED (7)
#define SIR_REJECT_TO_SEND (8)
#define SIR_SWIDE_OVERRUN (9)
#define SIR_SODL_UNDERRUN (10)
#define SIR_RESEL_NO_MSG_IN (11)
#define SIR_RESEL_NO_IDENTIFY (12)
#define SIR_RESEL_BAD_LUN (13)
#define SIR_TARGET_SELECTED (14)
#define SIR_RESEL_BAD_I_T_L (15)
#define SIR_RESEL_BAD_I_T_L_Q (16)
#define SIR_ABORT_SENT (17)
#define SIR_RESEL_ABORTED (18)
#define SIR_MSG_OUT_DONE (19)
#define SIR_COMPLETE_ERROR (20)
#define SIR_DATA_OVERRUN (21)
#define SIR_BAD_PHASE (22)
#define SIR_MAX (22)
/*
* Extended error bit codes.
* xerr_status field of struct sym_ccb.
*/
#define XE_EXTRA_DATA (1) /* unexpected data phase */
#define XE_BAD_PHASE (1<<1) /* illegal phase (4/5) */
#define XE_PARITY_ERR (1<<2) /* unrecovered SCSI parity error */
#define XE_SODL_UNRUN (1<<3) /* ODD transfer in DATA OUT phase */
#define XE_SWIDE_OVRUN (1<<4) /* ODD transfer in DATA IN phase */
/*
* Negotiation status.
* nego_status field of struct sym_ccb.
*/
#define NS_SYNC (1)
#define NS_WIDE (2)
#define NS_PPR (3)
/*
* A CCB hashed table is used to retrieve CCB address
* from DSA value.
*/
#define CCB_HASH_SHIFT 8
#define CCB_HASH_SIZE (1UL << CCB_HASH_SHIFT)
#define CCB_HASH_MASK (CCB_HASH_SIZE-1)
#define CCB_HASH_CODE(dsa) (((dsa) >> 9) & CCB_HASH_MASK)
/*
* Device flags.
*/
#define SYM_DISC_ENABLED (1)
#define SYM_TAGS_ENABLED (1<<1)
#define SYM_SCAN_BOOT_DISABLED (1<<2)
#define SYM_SCAN_LUNS_DISABLED (1<<3)
/*
* Host adapter miscellaneous flags.
*/
#define SYM_AVOID_BUS_RESET (1)
#define SYM_SCAN_TARGETS_HILO (1<<1)
/*
* Device quirks.
* Some devices, for example the CHEETAH 2 LVD, disconnects without
* saving the DATA POINTER then reselects and terminates the IO.
* On reselection, the automatic RESTORE DATA POINTER makes the
* CURRENT DATA POINTER not point at the end of the IO.
* This behaviour just breaks our calculation of the residual.
* For now, we just force an AUTO SAVE on disconnection and will
* fix that in a further driver version.
*/
#define SYM_QUIRK_AUTOSAVE 1
/*
* Misc.
*/
#define SYM_LOCK() mtx_lock(&np->mtx)
#define SYM_LOCK_ASSERT(_what) mtx_assert(&np->mtx, (_what))
#define SYM_LOCK_DESTROY() mtx_destroy(&np->mtx)
#define SYM_LOCK_INIT() mtx_init(&np->mtx, "sym_lock", NULL, MTX_DEF)
#define SYM_LOCK_INITIALIZED() mtx_initialized(&np->mtx)
#define SYM_UNLOCK() mtx_unlock(&np->mtx)
#define SYM_SNOOP_TIMEOUT (10000000)
#define SYM_PCI_IO PCIR_BAR(0)
#define SYM_PCI_MMIO PCIR_BAR(1)
#define SYM_PCI_RAM PCIR_BAR(2)
#define SYM_PCI_RAM64 PCIR_BAR(3)
/*
* Back-pointer from the CAM CCB to our data structures.
*/
#define sym_hcb_ptr spriv_ptr0
/* #define sym_ccb_ptr spriv_ptr1 */
/*
* We mostly have to deal with pointers.
* Thus these typedef's.
*/
typedef struct sym_tcb *tcb_p;
typedef struct sym_lcb *lcb_p;
typedef struct sym_ccb *ccb_p;
typedef struct sym_hcb *hcb_p;
/*
* Gather negotiable parameters value
*/
struct sym_trans {
u8 scsi_version;
u8 spi_version;
u8 period;
u8 offset;
u8 width;
u8 options; /* PPR options */
};
struct sym_tinfo {
struct sym_trans current;
struct sym_trans goal;
struct sym_trans user;
};
#define BUS_8_BIT MSG_EXT_WDTR_BUS_8_BIT
#define BUS_16_BIT MSG_EXT_WDTR_BUS_16_BIT
/*
* Global TCB HEADER.
*
* Due to lack of indirect addressing on earlier NCR chips,
* this substructure is copied from the TCB to a global
* address after selection.
* For SYMBIOS chips that support LOAD/STORE this copy is
* not needed and thus not performed.
*/
struct sym_tcbh {
/*
* Scripts bus addresses of LUN table accessed from scripts.
* LUN #0 is a special case, since multi-lun devices are rare,
* and we we want to speed-up the general case and not waste
* resources.
*/
u32 luntbl_sa; /* bus address of this table */
u32 lun0_sa; /* bus address of LCB #0 */
/*
* Actual SYNC/WIDE IO registers value for this target.
* 'sval', 'wval' and 'uval' are read from SCRIPTS and
* so have alignment constraints.
*/
/*0*/ u_char uval; /* -> SCNTL4 register */
/*1*/ u_char sval; /* -> SXFER io register */
/*2*/ u_char filler1;
/*3*/ u_char wval; /* -> SCNTL3 io register */
};
/*
* Target Control Block
*/
struct sym_tcb {
/*
* TCB header.
* Assumed at offset 0.
*/
/*0*/ struct sym_tcbh head;
/*
* LUN table used by the SCRIPTS processor.
* An array of bus addresses is used on reselection.
*/
u32 *luntbl; /* LCBs bus address table */
/*
* LUN table used by the C code.
*/
lcb_p lun0p; /* LCB of LUN #0 (usual case) */
#if SYM_CONF_MAX_LUN > 1
lcb_p *lunmp; /* Other LCBs [1..MAX_LUN] */
#endif
/*
* Bitmap that tells about LUNs that succeeded at least
* 1 IO and therefore assumed to be a real device.
* Avoid useless allocation of the LCB structure.
*/
u32 lun_map[(SYM_CONF_MAX_LUN+31)/32];
/*
* Bitmap that tells about LUNs that haven't yet an LCB
* allocated (not discovered or LCB allocation failed).
*/
u32 busy0_map[(SYM_CONF_MAX_LUN+31)/32];
/*
* Transfer capabilities (SIP)
*/
struct sym_tinfo tinfo;
/*
* Keep track of the CCB used for the negotiation in order
* to ensure that only 1 negotiation is queued at a time.
*/
ccb_p nego_cp; /* CCB used for the nego */
/*
* Set when we want to reset the device.
*/
u_char to_reset;
/*
* Other user settable limits and options.
* These limits are read from the NVRAM if present.
*/
u_char usrflags;
u_short usrtags;
};
/*
* Assert some alignments required by the chip.
*/
CTASSERT(((offsetof(struct sym_reg, nc_sxfer) ^
offsetof(struct sym_tcb, head.sval)) &3) == 0);
CTASSERT(((offsetof(struct sym_reg, nc_scntl3) ^
offsetof(struct sym_tcb, head.wval)) &3) == 0);
/*
* Global LCB HEADER.
*
* Due to lack of indirect addressing on earlier NCR chips,
* this substructure is copied from the LCB to a global
* address after selection.
* For SYMBIOS chips that support LOAD/STORE this copy is
* not needed and thus not performed.
*/
struct sym_lcbh {
/*
* SCRIPTS address jumped by SCRIPTS on reselection.
* For not probed logical units, this address points to
* SCRIPTS that deal with bad LU handling (must be at
* offset zero of the LCB for that reason).
*/
/*0*/ u32 resel_sa;
/*
* Task (bus address of a CCB) read from SCRIPTS that points
* to the unique ITL nexus allowed to be disconnected.
*/
u32 itl_task_sa;
/*
* Task table bus address (read from SCRIPTS).
*/
u32 itlq_tbl_sa;
};
/*
* Logical Unit Control Block
*/
struct sym_lcb {
/*
* TCB header.
* Assumed at offset 0.
*/
/*0*/ struct sym_lcbh head;
/*
* Task table read from SCRIPTS that contains pointers to
* ITLQ nexuses. The bus address read from SCRIPTS is
* inside the header.
*/
u32 *itlq_tbl; /* Kernel virtual address */
/*
* Busy CCBs management.
*/
u_short busy_itlq; /* Number of busy tagged CCBs */
u_short busy_itl; /* Number of busy untagged CCBs */
/*
* Circular tag allocation buffer.
*/
u_short ia_tag; /* Tag allocation index */
u_short if_tag; /* Tag release index */
u_char *cb_tags; /* Circular tags buffer */
/*
* Set when we want to clear all tasks.
*/
u_char to_clear;
/*
* Capabilities.
*/
u_char user_flags;
u_char current_flags;
};
/*
* Action from SCRIPTS on a task.
* Is part of the CCB, but is also used separately to plug
* error handling action to perform from SCRIPTS.
*/
struct sym_actscr {
u32 start; /* Jumped by SCRIPTS after selection */
u32 restart; /* Jumped by SCRIPTS on relection */
};
/*
* Phase mismatch context.
*
* It is part of the CCB and is used as parameters for the
* DATA pointer. We need two contexts to handle correctly the
* SAVED DATA POINTER.
*/
struct sym_pmc {
struct sym_tblmove sg; /* Updated interrupted SG block */
u32 ret; /* SCRIPT return address */
};
/*
* LUN control block lookup.
* We use a direct pointer for LUN #0, and a table of
* pointers which is only allocated for devices that support
* LUN(s) > 0.
*/
#if SYM_CONF_MAX_LUN <= 1
#define sym_lp(tp, lun) (!lun) ? (tp)->lun0p : 0
#else
#define sym_lp(tp, lun) \
(!lun) ? (tp)->lun0p : (tp)->lunmp ? (tp)->lunmp[(lun)] : 0
#endif
/*
* Status are used by the host and the script processor.
*
* The last four bytes (status[4]) are copied to the
* scratchb register (declared as scr0..scr3) just after the
* select/reselect, and copied back just after disconnecting.
* Inside the script the XX_REG are used.
*/
/*
* Last four bytes (script)
*/
#define QU_REG scr0
#define HS_REG scr1
#define HS_PRT nc_scr1
#define SS_REG scr2
#define SS_PRT nc_scr2
#define HF_REG scr3
#define HF_PRT nc_scr3
/*
* Last four bytes (host)
*/
#define actualquirks phys.head.status[0]
#define host_status phys.head.status[1]
#define ssss_status phys.head.status[2]
#define host_flags phys.head.status[3]
/*
* Host flags
*/
#define HF_IN_PM0 1u
#define HF_IN_PM1 (1u<<1)
#define HF_ACT_PM (1u<<2)
#define HF_DP_SAVED (1u<<3)
#define HF_SENSE (1u<<4)
#define HF_EXT_ERR (1u<<5)
#define HF_DATA_IN (1u<<6)
#ifdef SYM_CONF_IARB_SUPPORT
#define HF_HINT_IARB (1u<<7)
#endif
/*
* Global CCB HEADER.
*
* Due to lack of indirect addressing on earlier NCR chips,
* this substructure is copied from the ccb to a global
* address after selection (or reselection) and copied back
* before disconnect.
* For SYMBIOS chips that support LOAD/STORE this copy is
* not needed and thus not performed.
*/
struct sym_ccbh {
/*
* Start and restart SCRIPTS addresses (must be at 0).
*/
/*0*/ struct sym_actscr go;
/*
* SCRIPTS jump address that deal with data pointers.
* 'savep' points to the position in the script responsible
* for the actual transfer of data.
* It's written on reception of a SAVE_DATA_POINTER message.
*/
u32 savep; /* Jump address to saved data pointer */
u32 lastp; /* SCRIPTS address at end of data */
u32 goalp; /* Not accessed for now from SCRIPTS */
/*
* Status fields.
*/
u8 status[4];
};
/*
* Data Structure Block
*
* During execution of a ccb by the script processor, the
* DSA (data structure address) register points to this
* substructure of the ccb.
*/
struct sym_dsb {
/*
* CCB header.
* Also assumed at offset 0 of the sym_ccb structure.
*/
/*0*/ struct sym_ccbh head;
/*
* Phase mismatch contexts.
* We need two to handle correctly the SAVED DATA POINTER.
* MUST BOTH BE AT OFFSET < 256, due to using 8 bit arithmetic
* for address calculation from SCRIPTS.
*/
struct sym_pmc pm0;
struct sym_pmc pm1;
/*
* Table data for Script
*/
struct sym_tblsel select;
struct sym_tblmove smsg;
struct sym_tblmove smsg_ext;
struct sym_tblmove cmd;
struct sym_tblmove sense;
struct sym_tblmove wresid;
struct sym_tblmove data [SYM_CONF_MAX_SG];
};
/*
* Our Command Control Block
*/
struct sym_ccb {
/*
* This is the data structure which is pointed by the DSA
* register when it is executed by the script processor.
* It must be the first entry.
*/
struct sym_dsb phys;
/*
* Pointer to CAM ccb and related stuff.
*/
struct callout ch; /* callout handle */
union ccb *cam_ccb; /* CAM scsiio ccb */
u8 cdb_buf[16]; /* Copy of CDB */
u8 *sns_bbuf; /* Bounce buffer for sense data */
#define SYM_SNS_BBUF_LEN sizeof(struct scsi_sense_data)
int data_len; /* Total data length */
int segments; /* Number of SG segments */
/*
* Miscellaneous status'.
*/
u_char nego_status; /* Negotiation status */
u_char xerr_status; /* Extended error flags */
u32 extra_bytes; /* Extraneous bytes transferred */
/*
* Message areas.
* We prepare a message to be sent after selection.
* We may use a second one if the command is rescheduled
* due to CHECK_CONDITION or COMMAND TERMINATED.
* Contents are IDENTIFY and SIMPLE_TAG.
* While negotiating sync or wide transfer,
* a SDTR or WDTR message is appended.
*/
u_char scsi_smsg [12];
u_char scsi_smsg2[12];
/*
* Auto request sense related fields.
*/
u_char sensecmd[6]; /* Request Sense command */
u_char sv_scsi_status; /* Saved SCSI status */
u_char sv_xerr_status; /* Saved extended status */
int sv_resid; /* Saved residual */
/*
* Map for the DMA of user data.
*/
void *arg; /* Argument for some callback */
bus_dmamap_t dmamap; /* DMA map for user data */
u_char dmamapped;
#define SYM_DMA_NONE 0
#define SYM_DMA_READ 1
#define SYM_DMA_WRITE 2
/*
* Other fields.
*/
u32 ccb_ba; /* BUS address of this CCB */
u_short tag; /* Tag for this transfer */
/* NO_TAG means no tag */
u_char target;
u_char lun;
ccb_p link_ccbh; /* Host adapter CCB hash chain */
SYM_QUEHEAD
link_ccbq; /* Link to free/busy CCB queue */
u32 startp; /* Initial data pointer */
int ext_sg; /* Extreme data pointer, used */
int ext_ofs; /* to calculate the residual. */
u_char to_abort; /* Want this IO to be aborted */
};
#define CCB_BA(cp,lbl) (cp->ccb_ba + offsetof(struct sym_ccb, lbl))
/*
* Host Control Block
*/
struct sym_hcb {
struct mtx mtx;
/*
* Global headers.
* Due to poorness of addressing capabilities, earlier
* chips (810, 815, 825) copy part of the data structures
* (CCB, TCB and LCB) in fixed areas.
*/
#ifdef SYM_CONF_GENERIC_SUPPORT
struct sym_ccbh ccb_head;
struct sym_tcbh tcb_head;
struct sym_lcbh lcb_head;
#endif
/*
* Idle task and invalid task actions and
* their bus addresses.
*/
struct sym_actscr idletask, notask, bad_itl, bad_itlq;
vm_offset_t idletask_ba, notask_ba, bad_itl_ba, bad_itlq_ba;
/*
* Dummy lun table to protect us against target
* returning bad lun number on reselection.
*/
u32 *badluntbl; /* Table physical address */
u32 badlun_sa; /* SCRIPT handler BUS address */
/*
* Bus address of this host control block.
*/
u32 hcb_ba;
/*
* Bit 32-63 of the on-chip RAM bus address in LE format.
* The START_RAM64 script loads the MMRS and MMWS from this
* field.
*/
u32 scr_ram_seg;
/*
* Chip and controller indentification.
*/
device_t device;
/*
* Initial value of some IO register bits.
* These values are assumed to have been set by BIOS, and may
* be used to probe adapter implementation differences.
*/
u_char sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest3, sv_ctest4,
sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4, sv_scntl4,
sv_stest1;
/*
* Actual initial value of IO register bits used by the
* driver. They are loaded at initialisation according to
* features that are to be enabled/disabled.
*/
u_char rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest3, rv_ctest4,
rv_ctest5, rv_stest2, rv_ccntl0, rv_ccntl1, rv_scntl4;
/*
* Target data.
*/
#ifdef __amd64__
struct sym_tcb *target;
#else
struct sym_tcb target[SYM_CONF_MAX_TARGET];
#endif
/*
* Target control block bus address array used by the SCRIPT
* on reselection.
*/
u32 *targtbl;
u32 targtbl_ba;
/*
* CAM SIM information for this instance.
*/
struct cam_sim *sim;
struct cam_path *path;
/*
* Allocated hardware resources.
*/
struct resource *irq_res;
struct resource *io_res;
struct resource *mmio_res;
struct resource *ram_res;
int ram_id;
void *intr;
/*
* Bus stuff.
*
* My understanding of PCI is that all agents must share the
* same addressing range and model.
* But some hardware architecture guys provide complex and
* brain-deaded stuff that makes shit.
* This driver only support PCI compliant implementations and
* deals with part of the BUS stuff complexity only to fit O/S
* requirements.
*/
/*
* DMA stuff.
*/
bus_dma_tag_t bus_dmat; /* DMA tag from parent BUS */
bus_dma_tag_t data_dmat; /* DMA tag for user data */
/*
* BUS addresses of the chip
*/
vm_offset_t mmio_ba; /* MMIO BUS address */
int mmio_ws; /* MMIO Window size */
vm_offset_t ram_ba; /* RAM BUS address */
int ram_ws; /* RAM window size */
/*
* SCRIPTS virtual and physical bus addresses.
* 'script' is loaded in the on-chip RAM if present.
* 'scripth' stays in main memory for all chips except the
* 53C895A, 53C896 and 53C1010 that provide 8K on-chip RAM.
*/
u_char *scripta0; /* Copies of script and scripth */
u_char *scriptb0; /* Copies of script and scripth */
vm_offset_t scripta_ba; /* Actual script and scripth */
vm_offset_t scriptb_ba; /* bus addresses. */
vm_offset_t scriptb0_ba;
u_short scripta_sz; /* Actual size of script A */
u_short scriptb_sz; /* Actual size of script B */
/*
* Bus addresses, setup and patch methods for
* the selected firmware.
*/
struct sym_fwa_ba fwa_bas; /* Useful SCRIPTA bus addresses */
struct sym_fwb_ba fwb_bas; /* Useful SCRIPTB bus addresses */
void (*fw_setup)(hcb_p np, const struct sym_fw *fw);
void (*fw_patch)(hcb_p np);
const char *fw_name;
/*
* General controller parameters and configuration.
*/
u_short device_id; /* PCI device id */
u_char revision_id; /* PCI device revision id */
u_int features; /* Chip features map */
u_char myaddr; /* SCSI id of the adapter */
u_char maxburst; /* log base 2 of dwords burst */
u_char maxwide; /* Maximum transfer width */
u_char minsync; /* Min sync period factor (ST) */
u_char maxsync; /* Max sync period factor (ST) */
u_char maxoffs; /* Max scsi offset (ST) */
u_char minsync_dt; /* Min sync period factor (DT) */
u_char maxsync_dt; /* Max sync period factor (DT) */
u_char maxoffs_dt; /* Max scsi offset (DT) */
u_char multiplier; /* Clock multiplier (1,2,4) */
u_char clock_divn; /* Number of clock divisors */
u32 clock_khz; /* SCSI clock frequency in KHz */
u32 pciclk_khz; /* Estimated PCI clock in KHz */
/*
* Start queue management.
* It is filled up by the host processor and accessed by the
* SCRIPTS processor in order to start SCSI commands.
*/
volatile /* Prevent code optimizations */
u32 *squeue; /* Start queue virtual address */
u32 squeue_ba; /* Start queue BUS address */
u_short squeueput; /* Next free slot of the queue */
u_short actccbs; /* Number of allocated CCBs */
/*
* Command completion queue.
* It is the same size as the start queue to avoid overflow.
*/
u_short dqueueget; /* Next position to scan */
volatile /* Prevent code optimizations */
u32 *dqueue; /* Completion (done) queue */
u32 dqueue_ba; /* Done queue BUS address */
/*
* Miscellaneous buffers accessed by the scripts-processor.
* They shall be DWORD aligned, because they may be read or
* written with a script command.
*/
u_char msgout[8]; /* Buffer for MESSAGE OUT */
u_char msgin [8]; /* Buffer for MESSAGE IN */
u32 lastmsg; /* Last SCSI message sent */
u_char scratch; /* Scratch for SCSI receive */
/*
* Miscellaneous configuration and status parameters.
*/
u_char usrflags; /* Miscellaneous user flags */
u_char scsi_mode; /* Current SCSI BUS mode */
u_char verbose; /* Verbosity for this controller*/
u32 cache; /* Used for cache test at init. */
/*
* CCB lists and queue.
*/
ccb_p ccbh[CCB_HASH_SIZE]; /* CCB hashed by DSA value */
SYM_QUEHEAD free_ccbq; /* Queue of available CCBs */
SYM_QUEHEAD busy_ccbq; /* Queue of busy CCBs */
/*
* During error handling and/or recovery,
* active CCBs that are to be completed with
* error or requeued are moved from the busy_ccbq
* to the comp_ccbq prior to completion.
*/
SYM_QUEHEAD comp_ccbq;
/*
* CAM CCB pending queue.
*/
SYM_QUEHEAD cam_ccbq;
/*
* IMMEDIATE ARBITRATION (IARB) control.
*
* We keep track in 'last_cp' of the last CCB that has been
* queued to the SCRIPTS processor and clear 'last_cp' when
* this CCB completes. If last_cp is not zero at the moment
* we queue a new CCB, we set a flag in 'last_cp' that is
* used by the SCRIPTS as a hint for setting IARB.
* We donnot set more than 'iarb_max' consecutive hints for
* IARB in order to leave devices a chance to reselect.
* By the way, any non zero value of 'iarb_max' is unfair. :)
*/
#ifdef SYM_CONF_IARB_SUPPORT
u_short iarb_max; /* Max. # consecutive IARB hints*/
u_short iarb_count; /* Actual # of these hints */
ccb_p last_cp;
#endif
/*
* Command abort handling.
* We need to synchronize tightly with the SCRIPTS
* processor in order to handle things correctly.
*/
u_char abrt_msg[4]; /* Message to send buffer */
struct sym_tblmove abrt_tbl; /* Table for the MOV of it */
struct sym_tblsel abrt_sel; /* Sync params for selection */
u_char istat_sem; /* Tells the chip to stop (SEM) */
};
#define HCB_BA(np, lbl) (np->hcb_ba + offsetof(struct sym_hcb, lbl))
/*
* Return the name of the controller.
*/
static __inline const char *sym_name(hcb_p np)
{
return device_get_nameunit(np->device);
}
/*--------------------------------------------------------------------------*/
/*------------------------------ FIRMWARES ---------------------------------*/
/*--------------------------------------------------------------------------*/
/*
* This stuff will be moved to a separate source file when
* the driver will be broken into several source modules.
*/
/*
* Macros used for all firmwares.
*/
#define SYM_GEN_A(s, label) ((short) offsetof(s, label)),
#define SYM_GEN_B(s, label) ((short) offsetof(s, label)),
#define PADDR_A(label) SYM_GEN_PADDR_A(struct SYM_FWA_SCR, label)
#define PADDR_B(label) SYM_GEN_PADDR_B(struct SYM_FWB_SCR, label)
#ifdef SYM_CONF_GENERIC_SUPPORT
/*
* Allocate firmware #1 script area.
*/
#define SYM_FWA_SCR sym_fw1a_scr
#define SYM_FWB_SCR sym_fw1b_scr
#include <dev/sym/sym_fw1.h>
static const struct sym_fwa_ofs sym_fw1a_ofs = {
SYM_GEN_FW_A(struct SYM_FWA_SCR)
};
static const struct sym_fwb_ofs sym_fw1b_ofs = {
SYM_GEN_FW_B(struct SYM_FWB_SCR)
};
#undef SYM_FWA_SCR
#undef SYM_FWB_SCR
#endif /* SYM_CONF_GENERIC_SUPPORT */
/*
* Allocate firmware #2 script area.
*/
#define SYM_FWA_SCR sym_fw2a_scr
#define SYM_FWB_SCR sym_fw2b_scr
#include <dev/sym/sym_fw2.h>
static const struct sym_fwa_ofs sym_fw2a_ofs = {
SYM_GEN_FW_A(struct SYM_FWA_SCR)
};
static const struct sym_fwb_ofs sym_fw2b_ofs = {
SYM_GEN_FW_B(struct SYM_FWB_SCR)
SYM_GEN_B(struct SYM_FWB_SCR, start64)
SYM_GEN_B(struct SYM_FWB_SCR, pm_handle)
};
#undef SYM_FWA_SCR
#undef SYM_FWB_SCR
#undef SYM_GEN_A
#undef SYM_GEN_B
#undef PADDR_A
#undef PADDR_B
#ifdef SYM_CONF_GENERIC_SUPPORT
/*
* Patch routine for firmware #1.
*/
static void
sym_fw1_patch(hcb_p np)
{
struct sym_fw1a_scr *scripta0;
struct sym_fw1b_scr *scriptb0;
scripta0 = (struct sym_fw1a_scr *) np->scripta0;
scriptb0 = (struct sym_fw1b_scr *) np->scriptb0;
/*
* Remove LED support if not needed.
*/
if (!(np->features & FE_LED0)) {
scripta0->idle[0] = cpu_to_scr(SCR_NO_OP);
scripta0->reselected[0] = cpu_to_scr(SCR_NO_OP);
scripta0->start[0] = cpu_to_scr(SCR_NO_OP);
}
#ifdef SYM_CONF_IARB_SUPPORT
/*
* If user does not want to use IMMEDIATE ARBITRATION
* when we are reselected while attempting to arbitrate,
* patch the SCRIPTS accordingly with a SCRIPT NO_OP.
*/
if (!SYM_CONF_SET_IARB_ON_ARB_LOST)
scripta0->ungetjob[0] = cpu_to_scr(SCR_NO_OP);
#endif
/*
* Patch some data in SCRIPTS.
* - start and done queue initial bus address.
* - target bus address table bus address.
*/
scriptb0->startpos[0] = cpu_to_scr(np->squeue_ba);
scriptb0->done_pos[0] = cpu_to_scr(np->dqueue_ba);
scriptb0->targtbl[0] = cpu_to_scr(np->targtbl_ba);
}
#endif /* SYM_CONF_GENERIC_SUPPORT */
/*
* Patch routine for firmware #2.
*/
static void
sym_fw2_patch(hcb_p np)
{
struct sym_fw2a_scr *scripta0;
struct sym_fw2b_scr *scriptb0;
scripta0 = (struct sym_fw2a_scr *) np->scripta0;
scriptb0 = (struct sym_fw2b_scr *) np->scriptb0;
/*
* Remove LED support if not needed.
*/
if (!(np->features & FE_LED0)) {
scripta0->idle[0] = cpu_to_scr(SCR_NO_OP);
scripta0->reselected[0] = cpu_to_scr(SCR_NO_OP);
scripta0->start[0] = cpu_to_scr(SCR_NO_OP);
}
#ifdef SYM_CONF_IARB_SUPPORT
/*
* If user does not want to use IMMEDIATE ARBITRATION
* when we are reselected while attempting to arbitrate,
* patch the SCRIPTS accordingly with a SCRIPT NO_OP.
*/
if (!SYM_CONF_SET_IARB_ON_ARB_LOST)
scripta0->ungetjob[0] = cpu_to_scr(SCR_NO_OP);
#endif
/*
* Patch some variable in SCRIPTS.
* - start and done queue initial bus address.
* - target bus address table bus address.
*/
scriptb0->startpos[0] = cpu_to_scr(np->squeue_ba);
scriptb0->done_pos[0] = cpu_to_scr(np->dqueue_ba);
scriptb0->targtbl[0] = cpu_to_scr(np->targtbl_ba);
/*
* Remove the load of SCNTL4 on reselection if not a C10.
*/
if (!(np->features & FE_C10)) {
scripta0->resel_scntl4[0] = cpu_to_scr(SCR_NO_OP);
scripta0->resel_scntl4[1] = cpu_to_scr(0);
}
/*
* Remove a couple of work-arounds specific to C1010 if
* they are not desirable. See `sym_fw2.h' for more details.
*/
if (!(np->device_id == PCI_ID_LSI53C1010_2 &&
np->revision_id < 0x1 &&
np->pciclk_khz < 60000)) {
scripta0->datao_phase[0] = cpu_to_scr(SCR_NO_OP);
scripta0->datao_phase[1] = cpu_to_scr(0);
}
if (!(np->device_id == PCI_ID_LSI53C1010 &&
/* np->revision_id < 0xff */ 1)) {
scripta0->sel_done[0] = cpu_to_scr(SCR_NO_OP);
scripta0->sel_done[1] = cpu_to_scr(0);
}
/*
* Patch some other variables in SCRIPTS.
* These ones are loaded by the SCRIPTS processor.
*/
scriptb0->pm0_data_addr[0] =
cpu_to_scr(np->scripta_ba +
offsetof(struct sym_fw2a_scr, pm0_data));
scriptb0->pm1_data_addr[0] =
cpu_to_scr(np->scripta_ba +
offsetof(struct sym_fw2a_scr, pm1_data));
}
/*
* Fill the data area in scripts.
* To be done for all firmwares.
*/
static void
sym_fw_fill_data (u32 *in, u32 *out)
{
int i;
for (i = 0; i < SYM_CONF_MAX_SG; i++) {
*in++ = SCR_CHMOV_TBL ^ SCR_DATA_IN;
*in++ = offsetof (struct sym_dsb, data[i]);
*out++ = SCR_CHMOV_TBL ^ SCR_DATA_OUT;
*out++ = offsetof (struct sym_dsb, data[i]);
}
}
/*
* Setup useful script bus addresses.
* To be done for all firmwares.
*/
static void
sym_fw_setup_bus_addresses(hcb_p np, const struct sym_fw *fw)
{
u32 *pa;
const u_short *po;
int i;
/*
* Build the bus address table for script A
* from the script A offset table.
*/
po = (const u_short *) fw->a_ofs;
pa = (u32 *) &np->fwa_bas;
for (i = 0 ; i < sizeof(np->fwa_bas)/sizeof(u32) ; i++)
pa[i] = np->scripta_ba + po[i];
/*
* Same for script B.
*/
po = (const u_short *) fw->b_ofs;
pa = (u32 *) &np->fwb_bas;
for (i = 0 ; i < sizeof(np->fwb_bas)/sizeof(u32) ; i++)
pa[i] = np->scriptb_ba + po[i];
}
#ifdef SYM_CONF_GENERIC_SUPPORT
/*
* Setup routine for firmware #1.
*/
static void
sym_fw1_setup(hcb_p np, const struct sym_fw *fw)
{
struct sym_fw1a_scr *scripta0;
scripta0 = (struct sym_fw1a_scr *) np->scripta0;
/*
* Fill variable parts in scripts.
*/
sym_fw_fill_data(scripta0->data_in, scripta0->data_out);
/*
* Setup bus addresses used from the C code..
*/
sym_fw_setup_bus_addresses(np, fw);
}
#endif /* SYM_CONF_GENERIC_SUPPORT */
/*
* Setup routine for firmware #2.
*/
static void
sym_fw2_setup(hcb_p np, const struct sym_fw *fw)
{
struct sym_fw2a_scr *scripta0;
scripta0 = (struct sym_fw2a_scr *) np->scripta0;
/*
* Fill variable parts in scripts.
*/
sym_fw_fill_data(scripta0->data_in, scripta0->data_out);
/*
* Setup bus addresses used from the C code..
*/
sym_fw_setup_bus_addresses(np, fw);
}
/*
* Allocate firmware descriptors.
*/
#ifdef SYM_CONF_GENERIC_SUPPORT
static const struct sym_fw sym_fw1 = SYM_FW_ENTRY(sym_fw1, "NCR-generic");
#endif /* SYM_CONF_GENERIC_SUPPORT */
static const struct sym_fw sym_fw2 = SYM_FW_ENTRY(sym_fw2, "LOAD/STORE-based");
/*
* Find the most appropriate firmware for a chip.
*/
static const struct sym_fw *
sym_find_firmware(const struct sym_pci_chip *chip)
{
if (chip->features & FE_LDSTR)
return &sym_fw2;
#ifdef SYM_CONF_GENERIC_SUPPORT
else if (!(chip->features & (FE_PFEN|FE_NOPM|FE_DAC)))
return &sym_fw1;
#endif
else
return NULL;
}
/*
* Bind a script to physical addresses.
*/
static void sym_fw_bind_script (hcb_p np, u32 *start, int len)
{
u32 opcode, new, old, tmp1, tmp2;
u32 *end, *cur;
int relocs;
cur = start;
end = start + len/4;
while (cur < end) {
opcode = *cur;
/*
* If we forget to change the length
* in scripts, a field will be
* padded with 0. This is an illegal
* command.
*/
if (opcode == 0) {
printf ("%s: ERROR0 IN SCRIPT at %d.\n",
sym_name(np), (int) (cur-start));
MDELAY (10000);
++cur;
continue;
}
/*
* We use the bogus value 0xf00ff00f ;-)
* to reserve data area in SCRIPTS.
*/
if (opcode == SCR_DATA_ZERO) {
*cur++ = 0;
continue;
}
if (DEBUG_FLAGS & DEBUG_SCRIPT)
printf ("%d: <%x>\n", (int) (cur-start),
(unsigned)opcode);
/*
* We don't have to decode ALL commands
*/
switch (opcode >> 28) {
case 0xf:
/*
* LOAD / STORE DSA relative, don't relocate.
*/
relocs = 0;
break;
case 0xe:
/*
* LOAD / STORE absolute.
*/
relocs = 1;
break;
case 0xc:
/*
* COPY has TWO arguments.
*/
relocs = 2;
tmp1 = cur[1];
tmp2 = cur[2];
if ((tmp1 ^ tmp2) & 3) {
printf ("%s: ERROR1 IN SCRIPT at %d.\n",
sym_name(np), (int) (cur-start));
MDELAY (10000);
}
/*
* If PREFETCH feature not enabled, remove
* the NO FLUSH bit if present.
*/
if ((opcode & SCR_NO_FLUSH) &&
!(np->features & FE_PFEN)) {
opcode = (opcode & ~SCR_NO_FLUSH);
}
break;
case 0x0:
/*
* MOVE/CHMOV (absolute address)
*/
if (!(np->features & FE_WIDE))
opcode = (opcode | OPC_MOVE);
relocs = 1;
break;
case 0x1:
/*
* MOVE/CHMOV (table indirect)
*/
if (!(np->features & FE_WIDE))
opcode = (opcode | OPC_MOVE);
relocs = 0;
break;
case 0x8:
/*
* JUMP / CALL
* dont't relocate if relative :-)
*/
if (opcode & 0x00800000)
relocs = 0;
else if ((opcode & 0xf8400000) == 0x80400000)/*JUMP64*/
relocs = 2;
else
relocs = 1;
break;
case 0x4:
case 0x5:
case 0x6:
case 0x7:
relocs = 1;
break;
default:
relocs = 0;
break;
}
/*
* Scriptify:) the opcode.
*/
*cur++ = cpu_to_scr(opcode);
/*
* If no relocation, assume 1 argument
* and just scriptize:) it.
*/
if (!relocs) {
*cur = cpu_to_scr(*cur);
++cur;
continue;
}
/*
* Otherwise performs all needed relocations.
*/
while (relocs--) {
old = *cur;
switch (old & RELOC_MASK) {
case RELOC_REGISTER:
new = (old & ~RELOC_MASK) + np->mmio_ba;
break;
case RELOC_LABEL_A:
new = (old & ~RELOC_MASK) + np->scripta_ba;
break;
case RELOC_LABEL_B:
new = (old & ~RELOC_MASK) + np->scriptb_ba;
break;
case RELOC_SOFTC:
new = (old & ~RELOC_MASK) + np->hcb_ba;
break;
case 0:
/*
* Don't relocate a 0 address.
* They are mostly used for patched or
* script self-modified areas.
*/
if (old == 0) {
new = old;
break;
}
/* fall through */
default:
new = 0;
panic("sym_fw_bind_script: "
"weird relocation %x\n", old);
break;
}
*cur++ = cpu_to_scr(new);
}
}
}
/*---------------------------------------------------------------------------*/
/*--------------------------- END OF FIRMWARES -----------------------------*/
/*---------------------------------------------------------------------------*/
/*
* Function prototypes.
*/
static void sym_save_initial_setting (hcb_p np);
static int sym_prepare_setting (hcb_p np, struct sym_nvram *nvram);
static int sym_prepare_nego (hcb_p np, ccb_p cp, int nego, u_char *msgptr);
static void sym_put_start_queue (hcb_p np, ccb_p cp);
static void sym_chip_reset (hcb_p np);
static void sym_soft_reset (hcb_p np);
static void sym_start_reset (hcb_p np);
static int sym_reset_scsi_bus (hcb_p np, int enab_int);
static int sym_wakeup_done (hcb_p np);
static void sym_flush_busy_queue (hcb_p np, int cam_status);
static void sym_flush_comp_queue (hcb_p np, int cam_status);
static void sym_init (hcb_p np, int reason);
static int sym_getsync(hcb_p np, u_char dt, u_char sfac, u_char *divp,
u_char *fakp);
static void sym_setsync (hcb_p np, ccb_p cp, u_char ofs, u_char per,
u_char div, u_char fak);
static void sym_setwide (hcb_p np, ccb_p cp, u_char wide);
static void sym_setpprot(hcb_p np, ccb_p cp, u_char dt, u_char ofs,
u_char per, u_char wide, u_char div, u_char fak);
static void sym_settrans(hcb_p np, ccb_p cp, u_char dt, u_char ofs,
u_char per, u_char wide, u_char div, u_char fak);
static void sym_log_hard_error (hcb_p np, u_short sist, u_char dstat);
static void sym_intr (void *arg);
static void sym_poll (struct cam_sim *sim);
static void sym_recover_scsi_int (hcb_p np, u_char hsts);
static void sym_int_sto (hcb_p np);
static void sym_int_udc (hcb_p np);
static void sym_int_sbmc (hcb_p np);
static void sym_int_par (hcb_p np, u_short sist);
static void sym_int_ma (hcb_p np);
static int sym_dequeue_from_squeue(hcb_p np, int i, int target, int lun,
int task);
static void sym_sir_bad_scsi_status (hcb_p np, ccb_p cp);
static int sym_clear_tasks (hcb_p np, int status, int targ, int lun, int task);
static void sym_sir_task_recovery (hcb_p np, int num);
static int sym_evaluate_dp (hcb_p np, ccb_p cp, u32 scr, int *ofs);
static void sym_modify_dp(hcb_p np, ccb_p cp, int ofs);
static int sym_compute_residual (hcb_p np, ccb_p cp);
static int sym_show_msg (u_char * msg);
static void sym_print_msg (ccb_p cp, char *label, u_char *msg);
static void sym_sync_nego (hcb_p np, tcb_p tp, ccb_p cp);
static void sym_ppr_nego (hcb_p np, tcb_p tp, ccb_p cp);
static void sym_wide_nego (hcb_p np, tcb_p tp, ccb_p cp);
static void sym_nego_default (hcb_p np, tcb_p tp, ccb_p cp);
static void sym_nego_rejected (hcb_p np, tcb_p tp, ccb_p cp);
static void sym_int_sir (hcb_p np);
static void sym_free_ccb (hcb_p np, ccb_p cp);
static ccb_p sym_get_ccb (hcb_p np, u_char tn, u_char ln, u_char tag_order);
static ccb_p sym_alloc_ccb (hcb_p np);
static ccb_p sym_ccb_from_dsa (hcb_p np, u32 dsa);
static lcb_p sym_alloc_lcb (hcb_p np, u_char tn, u_char ln);
static void sym_alloc_lcb_tags (hcb_p np, u_char tn, u_char ln);
static int sym_snooptest (hcb_p np);
static void sym_selectclock(hcb_p np, u_char scntl3);
static void sym_getclock (hcb_p np, int mult);
static int sym_getpciclock (hcb_p np);
static void sym_complete_ok (hcb_p np, ccb_p cp);
static void sym_complete_error (hcb_p np, ccb_p cp);
static void sym_callout (void *arg);
static int sym_abort_scsiio (hcb_p np, union ccb *ccb, int timed_out);
static void sym_reset_dev (hcb_p np, union ccb *ccb);
static void sym_action (struct cam_sim *sim, union ccb *ccb);
static int sym_setup_cdb (hcb_p np, struct ccb_scsiio *csio, ccb_p cp);
static void sym_setup_data_and_start (hcb_p np, struct ccb_scsiio *csio,
ccb_p cp);
static int sym_fast_scatter_sg_physical(hcb_p np, ccb_p cp,
bus_dma_segment_t *psegs, int nsegs);
static int sym_scatter_sg_physical (hcb_p np, ccb_p cp,
bus_dma_segment_t *psegs, int nsegs);
static void sym_action2 (struct cam_sim *sim, union ccb *ccb);
static void sym_update_trans(hcb_p np, struct sym_trans *tip,
struct ccb_trans_settings *cts);
static void sym_update_dflags(hcb_p np, u_char *flags,
struct ccb_trans_settings *cts);
static const struct sym_pci_chip *sym_find_pci_chip (device_t dev);
static int sym_pci_probe (device_t dev);
static int sym_pci_attach (device_t dev);
static void sym_pci_free (hcb_p np);
static int sym_cam_attach (hcb_p np);
static void sym_cam_free (hcb_p np);
static void sym_nvram_setup_host (hcb_p np, struct sym_nvram *nvram);
static void sym_nvram_setup_target (hcb_p np, int targ, struct sym_nvram *nvp);
static int sym_read_nvram (hcb_p np, struct sym_nvram *nvp);
/*
* Print something which allows to retrieve the controller type,
* unit, target, lun concerned by a kernel message.
*/
static void PRINT_TARGET (hcb_p np, int target)
{
printf ("%s:%d:", sym_name(np), target);
}
static void PRINT_LUN(hcb_p np, int target, int lun)
{
printf ("%s:%d:%d:", sym_name(np), target, lun);
}
static void PRINT_ADDR (ccb_p cp)
{
if (cp && cp->cam_ccb)
xpt_print_path(cp->cam_ccb->ccb_h.path);
}
/*
* Take into account this ccb in the freeze count.
*/
static void sym_freeze_cam_ccb(union ccb *ccb)
{
if (!(ccb->ccb_h.flags & CAM_DEV_QFRZDIS)) {
if (!(ccb->ccb_h.status & CAM_DEV_QFRZN)) {
ccb->ccb_h.status |= CAM_DEV_QFRZN;
xpt_freeze_devq(ccb->ccb_h.path, 1);
}
}
}
/*
* Set the status field of a CAM CCB.
*/
static __inline void sym_set_cam_status(union ccb *ccb, cam_status status)
{
ccb->ccb_h.status &= ~CAM_STATUS_MASK;
ccb->ccb_h.status |= status;
}
/*
* Get the status field of a CAM CCB.
*/
static __inline int sym_get_cam_status(union ccb *ccb)
{
return ccb->ccb_h.status & CAM_STATUS_MASK;
}
/*
* Enqueue a CAM CCB.
*/
static void sym_enqueue_cam_ccb(ccb_p cp)
{
hcb_p np;
union ccb *ccb;
ccb = cp->cam_ccb;
np = (hcb_p) cp->arg;
assert(!(ccb->ccb_h.status & CAM_SIM_QUEUED));
ccb->ccb_h.status = CAM_REQ_INPROG;
callout_reset_sbt(&cp->ch, SBT_1MS * ccb->ccb_h.timeout, 0, sym_callout,
(caddr_t)ccb, 0);
ccb->ccb_h.status |= CAM_SIM_QUEUED;
ccb->ccb_h.sym_hcb_ptr = np;
sym_insque_tail(sym_qptr(&ccb->ccb_h.sim_links), &np->cam_ccbq);
}
/*
* Complete a pending CAM CCB.
*/
static void sym_xpt_done(hcb_p np, union ccb *ccb, ccb_p cp)
{
SYM_LOCK_ASSERT(MA_OWNED);
if (ccb->ccb_h.status & CAM_SIM_QUEUED) {
callout_stop(&cp->ch);
sym_remque(sym_qptr(&ccb->ccb_h.sim_links));
ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
ccb->ccb_h.sym_hcb_ptr = NULL;
}
xpt_done(ccb);
}
static void sym_xpt_done2(hcb_p np, union ccb *ccb, int cam_status)
{
SYM_LOCK_ASSERT(MA_OWNED);
sym_set_cam_status(ccb, cam_status);
xpt_done(ccb);
}
/*
* SYMBIOS chip clock divisor table.
*
* Divisors are multiplied by 10,000,000 in order to make
* calculations more simple.
*/
#define _5M 5000000
static const u32 div_10M[] =
{2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
/*
* SYMBIOS chips allow burst lengths of 2, 4, 8, 16, 32, 64,
* 128 transfers. All chips support at least 16 transfers
* bursts. The 825A, 875 and 895 chips support bursts of up
* to 128 transfers and the 895A and 896 support bursts of up
* to 64 transfers. All other chips support up to 16
* transfers bursts.
*
* For PCI 32 bit data transfers each transfer is a DWORD.
* It is a QUADWORD (8 bytes) for PCI 64 bit data transfers.
*
* We use log base 2 (burst length) as internal code, with
* value 0 meaning "burst disabled".
*/
/*
* Burst length from burst code.
*/
#define burst_length(bc) (!(bc))? 0 : 1 << (bc)
/*
* Burst code from io register bits.
*/
#define burst_code(dmode, ctest4, ctest5) \
(ctest4) & 0x80? 0 : (((dmode) & 0xc0) >> 6) + ((ctest5) & 0x04) + 1
/*
* Set initial io register bits from burst code.
*/
static __inline void sym_init_burst(hcb_p np, u_char bc)
{
np->rv_ctest4 &= ~0x80;
np->rv_dmode &= ~(0x3 << 6);
np->rv_ctest5 &= ~0x4;
if (!bc) {
np->rv_ctest4 |= 0x80;
}
else {
--bc;
np->rv_dmode |= ((bc & 0x3) << 6);
np->rv_ctest5 |= (bc & 0x4);
}
}
/*
* Print out the list of targets that have some flag disabled by user.
*/
static void sym_print_targets_flag(hcb_p np, int mask, char *msg)
{
int cnt;
int i;
for (cnt = 0, i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) {
if (i == np->myaddr)
continue;
if (np->target[i].usrflags & mask) {
if (!cnt++)
printf("%s: %s disabled for targets",
sym_name(np), msg);
printf(" %d", i);
}
}
if (cnt)
printf(".\n");
}
/*
* Save initial settings of some IO registers.
* Assumed to have been set by BIOS.
* We cannot reset the chip prior to reading the
* IO registers, since informations will be lost.
* Since the SCRIPTS processor may be running, this
* is not safe on paper, but it seems to work quite
* well. :)
*/
static void sym_save_initial_setting (hcb_p np)
{
np->sv_scntl0 = INB(nc_scntl0) & 0x0a;
np->sv_scntl3 = INB(nc_scntl3) & 0x07;
np->sv_dmode = INB(nc_dmode) & 0xce;
np->sv_dcntl = INB(nc_dcntl) & 0xa8;
np->sv_ctest3 = INB(nc_ctest3) & 0x01;
np->sv_ctest4 = INB(nc_ctest4) & 0x80;
np->sv_gpcntl = INB(nc_gpcntl);
np->sv_stest1 = INB(nc_stest1);
np->sv_stest2 = INB(nc_stest2) & 0x20;
np->sv_stest4 = INB(nc_stest4);
if (np->features & FE_C10) { /* Always large DMA fifo + ultra3 */
np->sv_scntl4 = INB(nc_scntl4);
np->sv_ctest5 = INB(nc_ctest5) & 0x04;
}
else
np->sv_ctest5 = INB(nc_ctest5) & 0x24;
}
/*
* Prepare io register values used by sym_init() according
* to selected and supported features.
*/
static int sym_prepare_setting(hcb_p np, struct sym_nvram *nvram)
{
u_char burst_max;
u32 period;
int i;
/*
* Wide ?
*/
np->maxwide = (np->features & FE_WIDE)? 1 : 0;
/*
* Get the frequency of the chip's clock.
*/
if (np->features & FE_QUAD)
np->multiplier = 4;
else if (np->features & FE_DBLR)
np->multiplier = 2;
else
np->multiplier = 1;
np->clock_khz = (np->features & FE_CLK80)? 80000 : 40000;
np->clock_khz *= np->multiplier;
if (np->clock_khz != 40000)
sym_getclock(np, np->multiplier);
/*
* Divisor to be used for async (timer pre-scaler).
*/
i = np->clock_divn - 1;
while (--i >= 0) {
if (10ul * SYM_CONF_MIN_ASYNC * np->clock_khz > div_10M[i]) {
++i;
break;
}
}
np->rv_scntl3 = i+1;
/*
* The C1010 uses hardwired divisors for async.
* So, we just throw away, the async. divisor.:-)
*/
if (np->features & FE_C10)
np->rv_scntl3 = 0;
/*
* Minimum synchronous period factor supported by the chip.
* Btw, 'period' is in tenths of nanoseconds.
*/
period = howmany(4 * div_10M[0], np->clock_khz);
if (period <= 250) np->minsync = 10;
else if (period <= 303) np->minsync = 11;
else if (period <= 500) np->minsync = 12;
else np->minsync = howmany(period, 40);
/*
* Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
*/
if (np->minsync < 25 &&
!(np->features & (FE_ULTRA|FE_ULTRA2|FE_ULTRA3)))
np->minsync = 25;
else if (np->minsync < 12 &&
!(np->features & (FE_ULTRA2|FE_ULTRA3)))
np->minsync = 12;
/*
* Maximum synchronous period factor supported by the chip.
*/
period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
np->maxsync = period > 2540 ? 254 : period / 10;
/*
* If chip is a C1010, guess the sync limits in DT mode.
*/
if ((np->features & (FE_C10|FE_ULTRA3)) == (FE_C10|FE_ULTRA3)) {
if (np->clock_khz == 160000) {
np->minsync_dt = 9;
np->maxsync_dt = 50;
np->maxoffs_dt = 62;
}
}
/*
* 64 bit addressing (895A/896/1010) ?
*/
if (np->features & FE_DAC)
#ifdef __LP64__
np->rv_ccntl1 |= (XTIMOD | EXTIBMV);
#else
np->rv_ccntl1 |= (DDAC);
#endif
/*
* Phase mismatch handled by SCRIPTS (895A/896/1010) ?
*/
if (np->features & FE_NOPM)
np->rv_ccntl0 |= (ENPMJ);
/*
* C1010 Errata.
* In dual channel mode, contention occurs if internal cycles
* are used. Disable internal cycles.
*/
if (np->device_id == PCI_ID_LSI53C1010 &&
np->revision_id < 0x2)
np->rv_ccntl0 |= DILS;
/*
* Select burst length (dwords)
*/
burst_max = SYM_SETUP_BURST_ORDER;
if (burst_max == 255)
burst_max = burst_code(np->sv_dmode, np->sv_ctest4,
np->sv_ctest5);
if (burst_max > 7)
burst_max = 7;
if (burst_max > np->maxburst)
burst_max = np->maxburst;
/*
* DEL 352 - 53C810 Rev x11 - Part Number 609-0392140 - ITEM 2.
* This chip and the 860 Rev 1 may wrongly use PCI cache line
* based transactions on LOAD/STORE instructions. So we have
* to prevent these chips from using such PCI transactions in
* this driver. The generic ncr driver that does not use
* LOAD/STORE instructions does not need this work-around.
*/
if ((np->device_id == PCI_ID_SYM53C810 &&
np->revision_id >= 0x10 && np->revision_id <= 0x11) ||
(np->device_id == PCI_ID_SYM53C860 &&
np->revision_id <= 0x1))
np->features &= ~(FE_WRIE|FE_ERL|FE_ERMP);
/*
* Select all supported special features.
* If we are using on-board RAM for scripts, prefetch (PFEN)
* does not help, but burst op fetch (BOF) does.
* Disabling PFEN makes sure BOF will be used.
*/
if (np->features & FE_ERL)
np->rv_dmode |= ERL; /* Enable Read Line */
if (np->features & FE_BOF)
np->rv_dmode |= BOF; /* Burst Opcode Fetch */
if (np->features & FE_ERMP)
np->rv_dmode |= ERMP; /* Enable Read Multiple */
#if 1
if ((np->features & FE_PFEN) && !np->ram_ba)
#else
if (np->features & FE_PFEN)
#endif
np->rv_dcntl |= PFEN; /* Prefetch Enable */
if (np->features & FE_CLSE)
np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
if (np->features & FE_WRIE)
np->rv_ctest3 |= WRIE; /* Write and Invalidate */
if (np->features & FE_DFS)
np->rv_ctest5 |= DFS; /* Dma Fifo Size */
/*
* Select some other
*/
if (SYM_SETUP_PCI_PARITY)
np->rv_ctest4 |= MPEE; /* Master parity checking */
if (SYM_SETUP_SCSI_PARITY)
np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */
/*
* Get parity checking, host ID and verbose mode from NVRAM
*/
np->myaddr = 255;
sym_nvram_setup_host (np, nvram);
/*
* Get SCSI addr of host adapter (set by bios?).
*/
if (np->myaddr == 255) {
np->myaddr = INB(nc_scid) & 0x07;
if (!np->myaddr)
np->myaddr = SYM_SETUP_HOST_ID;
}
/*
* Prepare initial io register bits for burst length
*/
sym_init_burst(np, burst_max);
/*
* Set SCSI BUS mode.
* - LVD capable chips (895/895A/896/1010) report the
* current BUS mode through the STEST4 IO register.
* - For previous generation chips (825/825A/875),
* user has to tell us how to check against HVD,
* since a 100% safe algorithm is not possible.
*/
np->scsi_mode = SMODE_SE;
if (np->features & (FE_ULTRA2|FE_ULTRA3))
np->scsi_mode = (np->sv_stest4 & SMODE);
else if (np->features & FE_DIFF) {
if (SYM_SETUP_SCSI_DIFF == 1) {
if (np->sv_scntl3) {
if (np->sv_stest2 & 0x20)
np->scsi_mode = SMODE_HVD;
}
else if (nvram->type == SYM_SYMBIOS_NVRAM) {
if (!(INB(nc_gpreg) & 0x08))
np->scsi_mode = SMODE_HVD;
}
}
else if (SYM_SETUP_SCSI_DIFF == 2)
np->scsi_mode = SMODE_HVD;
}
if (np->scsi_mode == SMODE_HVD)
np->rv_stest2 |= 0x20;
/*
* Set LED support from SCRIPTS.
* Ignore this feature for boards known to use a
* specific GPIO wiring and for the 895A, 896
* and 1010 that drive the LED directly.
*/
if ((SYM_SETUP_SCSI_LED ||
(nvram->type == SYM_SYMBIOS_NVRAM ||
(nvram->type == SYM_TEKRAM_NVRAM &&
np->device_id == PCI_ID_SYM53C895))) &&
!(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01))
np->features |= FE_LED0;
/*
* Set irq mode.
*/
switch(SYM_SETUP_IRQ_MODE & 3) {
case 2:
np->rv_dcntl |= IRQM;
break;
case 1:
np->rv_dcntl |= (np->sv_dcntl & IRQM);
break;
default:
break;
}
/*
* Configure targets according to driver setup.
* If NVRAM present get targets setup from NVRAM.
*/
for (i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) {
tcb_p tp = &np->target[i];
tp->tinfo.user.scsi_version = tp->tinfo.current.scsi_version= 2;
tp->tinfo.user.spi_version = tp->tinfo.current.spi_version = 2;
tp->tinfo.user.period = np->minsync;
if (np->features & FE_ULTRA3)
tp->tinfo.user.period = np->minsync_dt;
tp->tinfo.user.offset = np->maxoffs;
tp->tinfo.user.width = np->maxwide ? BUS_16_BIT : BUS_8_BIT;
tp->usrflags |= (SYM_DISC_ENABLED | SYM_TAGS_ENABLED);
tp->usrtags = SYM_SETUP_MAX_TAG;
sym_nvram_setup_target (np, i, nvram);
/*
* For now, guess PPR/DT support from the period
* and BUS width.
*/
if (np->features & FE_ULTRA3) {
if (tp->tinfo.user.period <= 9 &&
tp->tinfo.user.width == BUS_16_BIT) {
tp->tinfo.user.options |= PPR_OPT_DT;
tp->tinfo.user.offset = np->maxoffs_dt;
tp->tinfo.user.spi_version = 3;
}
}
if (!tp->usrtags)
tp->usrflags &= ~SYM_TAGS_ENABLED;
}
/*
* Let user know about the settings.
*/
i = nvram->type;
printf("%s: %s NVRAM, ID %d, Fast-%d, %s, %s\n", sym_name(np),
i == SYM_SYMBIOS_NVRAM ? "Symbios" :
(i == SYM_TEKRAM_NVRAM ? "Tekram" : "No"),
np->myaddr,
(np->features & FE_ULTRA3) ? 80 :
(np->features & FE_ULTRA2) ? 40 :
(np->features & FE_ULTRA) ? 20 : 10,
sym_scsi_bus_mode(np->scsi_mode),
(np->rv_scntl0 & 0xa) ? "parity checking" : "NO parity");
/*
* Tell him more on demand.
*/
if (sym_verbose) {
printf("%s: %s IRQ line driver%s\n",
sym_name(np),
np->rv_dcntl & IRQM ? "totem pole" : "open drain",
np->ram_ba ? ", using on-chip SRAM" : "");
printf("%s: using %s firmware.\n", sym_name(np), np->fw_name);
if (np->features & FE_NOPM)
printf("%s: handling phase mismatch from SCRIPTS.\n",
sym_name(np));
}
/*
* And still more.
*/
if (sym_verbose > 1) {
printf ("%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
"(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
sym_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
printf ("%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
"(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
sym_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
}
/*
* Let user be aware of targets that have some disable flags set.
*/
sym_print_targets_flag(np, SYM_SCAN_BOOT_DISABLED, "SCAN AT BOOT");
if (sym_verbose)
sym_print_targets_flag(np, SYM_SCAN_LUNS_DISABLED,
"SCAN FOR LUNS");
return 0;
}
/*
* Prepare the next negotiation message if needed.
*
* Fill in the part of message buffer that contains the
* negotiation and the nego_status field of the CCB.
* Returns the size of the message in bytes.
*/
static int sym_prepare_nego(hcb_p np, ccb_p cp, int nego, u_char *msgptr)
{
tcb_p tp = &np->target[cp->target];
int msglen = 0;
/*
* Early C1010 chips need a work-around for DT
* data transfer to work.
*/
if (!(np->features & FE_U3EN))
tp->tinfo.goal.options = 0;
/*
* negotiate using PPR ?
*/
if (tp->tinfo.goal.options & PPR_OPT_MASK)
nego = NS_PPR;
/*
* negotiate wide transfers ?
*/
else if (tp->tinfo.current.width != tp->tinfo.goal.width)
nego = NS_WIDE;
/*
* negotiate synchronous transfers?
*/
else if (tp->tinfo.current.period != tp->tinfo.goal.period ||
tp->tinfo.current.offset != tp->tinfo.goal.offset)
nego = NS_SYNC;
switch (nego) {
case NS_SYNC:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 3;
msgptr[msglen++] = M_X_SYNC_REQ;
msgptr[msglen++] = tp->tinfo.goal.period;
msgptr[msglen++] = tp->tinfo.goal.offset;
break;
case NS_WIDE:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 2;
msgptr[msglen++] = M_X_WIDE_REQ;
msgptr[msglen++] = tp->tinfo.goal.width;
break;
case NS_PPR:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 6;
msgptr[msglen++] = M_X_PPR_REQ;
msgptr[msglen++] = tp->tinfo.goal.period;
msgptr[msglen++] = 0;
msgptr[msglen++] = tp->tinfo.goal.offset;
msgptr[msglen++] = tp->tinfo.goal.width;
msgptr[msglen++] = tp->tinfo.goal.options & PPR_OPT_DT;
break;
}
cp->nego_status = nego;
if (nego) {
tp->nego_cp = cp; /* Keep track a nego will be performed */
if (DEBUG_FLAGS & DEBUG_NEGO) {
sym_print_msg(cp, nego == NS_SYNC ? "sync msgout" :
nego == NS_WIDE ? "wide msgout" :
"ppr msgout", msgptr);
}
}
return msglen;
}
/*
* Insert a job into the start queue.
*/
static void sym_put_start_queue(hcb_p np, ccb_p cp)
{
u_short qidx;
#ifdef SYM_CONF_IARB_SUPPORT
/*
* If the previously queued CCB is not yet done,
* set the IARB hint. The SCRIPTS will go with IARB
* for this job when starting the previous one.
* We leave devices a chance to win arbitration by
* not using more than 'iarb_max' consecutive
* immediate arbitrations.
*/
if (np->last_cp && np->iarb_count < np->iarb_max) {
np->last_cp->host_flags |= HF_HINT_IARB;
++np->iarb_count;
}
else
np->iarb_count = 0;
np->last_cp = cp;
#endif
/*
* Insert first the idle task and then our job.
* The MB should ensure proper ordering.
*/
qidx = np->squeueput + 2;
if (qidx >= MAX_QUEUE*2) qidx = 0;
np->squeue [qidx] = cpu_to_scr(np->idletask_ba);
MEMORY_BARRIER();
np->squeue [np->squeueput] = cpu_to_scr(cp->ccb_ba);
np->squeueput = qidx;
if (DEBUG_FLAGS & DEBUG_QUEUE)
printf ("%s: queuepos=%d.\n", sym_name (np), np->squeueput);
/*
* Script processor may be waiting for reselect.
* Wake it up.
*/
MEMORY_BARRIER();
OUTB (nc_istat, SIGP|np->istat_sem);
}
/*
* Soft reset the chip.
*
* Raising SRST when the chip is running may cause
* problems on dual function chips (see below).
* On the other hand, LVD devices need some delay
* to settle and report actual BUS mode in STEST4.
*/
static void sym_chip_reset (hcb_p np)
{
OUTB (nc_istat, SRST);
UDELAY (10);
OUTB (nc_istat, 0);
UDELAY(2000); /* For BUS MODE to settle */
}
/*
* Soft reset the chip.
*
* Some 896 and 876 chip revisions may hang-up if we set
* the SRST (soft reset) bit at the wrong time when SCRIPTS
* are running.
* So, we need to abort the current operation prior to
* soft resetting the chip.
*/
static void sym_soft_reset (hcb_p np)
{
u_char istat;
int i;
OUTB (nc_istat, CABRT);
for (i = 1000000 ; i ; --i) {
istat = INB (nc_istat);
if (istat & SIP) {
INW (nc_sist);
continue;
}
if (istat & DIP) {
OUTB (nc_istat, 0);
INB (nc_dstat);
break;
}
}
if (!i)
printf("%s: unable to abort current chip operation.\n",
sym_name(np));
sym_chip_reset (np);
}
/*
* Start reset process.
*
* The interrupt handler will reinitialize the chip.
*/
static void sym_start_reset(hcb_p np)
{
(void) sym_reset_scsi_bus(np, 1);
}
static int sym_reset_scsi_bus(hcb_p np, int enab_int)
{
u32 term;
int retv = 0;
sym_soft_reset(np); /* Soft reset the chip */
if (enab_int)
OUTW (nc_sien, RST);
/*
* Enable Tolerant, reset IRQD if present and
* properly set IRQ mode, prior to resetting the bus.
*/
OUTB (nc_stest3, TE);
OUTB (nc_dcntl, (np->rv_dcntl & IRQM));
OUTB (nc_scntl1, CRST);
UDELAY (200);
if (!SYM_SETUP_SCSI_BUS_CHECK)
goto out;
/*
* Check for no terminators or SCSI bus shorts to ground.
* Read SCSI data bus, data parity bits and control signals.
* We are expecting RESET to be TRUE and other signals to be
* FALSE.
*/
term = INB(nc_sstat0);
term = ((term & 2) << 7) + ((term & 1) << 17); /* rst sdp0 */
term |= ((INB(nc_sstat2) & 0x01) << 26) | /* sdp1 */
((INW(nc_sbdl) & 0xff) << 9) | /* d7-0 */
((INW(nc_sbdl) & 0xff00) << 10) | /* d15-8 */
INB(nc_sbcl); /* req ack bsy sel atn msg cd io */
if (!(np->features & FE_WIDE))
term &= 0x3ffff;
if (term != (2<<7)) {
printf("%s: suspicious SCSI data while resetting the BUS.\n",
sym_name(np));
printf("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
"0x%lx, expecting 0x%lx\n",
sym_name(np),
(np->features & FE_WIDE) ? "dp1,d15-8," : "",
(u_long)term, (u_long)(2<<7));
if (SYM_SETUP_SCSI_BUS_CHECK == 1)
retv = 1;
}
out:
OUTB (nc_scntl1, 0);
/* MDELAY(100); */
return retv;
}
/*
* The chip may have completed jobs. Look at the DONE QUEUE.
*
* On architectures that may reorder LOAD/STORE operations,
* a memory barrier may be needed after the reading of the
* so-called `flag' and prior to dealing with the data.
*/
static int sym_wakeup_done (hcb_p np)
{
ccb_p cp;
int i, n;
u32 dsa;
SYM_LOCK_ASSERT(MA_OWNED);
n = 0;
i = np->dqueueget;
while (1) {
dsa = scr_to_cpu(np->dqueue[i]);
if (!dsa)
break;
np->dqueue[i] = 0;
if ((i = i+2) >= MAX_QUEUE*2)
i = 0;
cp = sym_ccb_from_dsa(np, dsa);
if (cp) {
MEMORY_BARRIER();
sym_complete_ok (np, cp);
++n;
}
else
printf ("%s: bad DSA (%x) in done queue.\n",
sym_name(np), (u_int) dsa);
}
np->dqueueget = i;
return n;
}
/*
* Complete all active CCBs with error.
* Used on CHIP/SCSI RESET.
*/
static void sym_flush_busy_queue (hcb_p np, int cam_status)
{
/*
* Move all active CCBs to the COMP queue
* and flush this queue.
*/
sym_que_splice(&np->busy_ccbq, &np->comp_ccbq);
sym_que_init(&np->busy_ccbq);
sym_flush_comp_queue(np, cam_status);
}
/*
* Start chip.
*
* 'reason' means:
* 0: initialisation.
* 1: SCSI BUS RESET delivered or received.
* 2: SCSI BUS MODE changed.
*/
static void sym_init (hcb_p np, int reason)
{
int i;
u32 phys;
SYM_LOCK_ASSERT(MA_OWNED);
/*
* Reset chip if asked, otherwise just clear fifos.
*/
if (reason == 1)
sym_soft_reset(np);
else {
OUTB (nc_stest3, TE|CSF);
OUTONB (nc_ctest3, CLF);
}
/*
* Clear Start Queue
*/
phys = np->squeue_ba;
for (i = 0; i < MAX_QUEUE*2; i += 2) {
np->squeue[i] = cpu_to_scr(np->idletask_ba);
np->squeue[i+1] = cpu_to_scr(phys + (i+2)*4);
}
np->squeue[MAX_QUEUE*2-1] = cpu_to_scr(phys);
/*
* Start at first entry.
*/
np->squeueput = 0;
/*
* Clear Done Queue
*/
phys = np->dqueue_ba;
for (i = 0; i < MAX_QUEUE*2; i += 2) {
np->dqueue[i] = 0;
np->dqueue[i+1] = cpu_to_scr(phys + (i+2)*4);
}
np->dqueue[MAX_QUEUE*2-1] = cpu_to_scr(phys);
/*
* Start at first entry.
*/
np->dqueueget = 0;
/*
* Install patches in scripts.
* This also let point to first position the start
* and done queue pointers used from SCRIPTS.
*/
np->fw_patch(np);
/*
* Wakeup all pending jobs.
*/
sym_flush_busy_queue(np, CAM_SCSI_BUS_RESET);
/*
* Init chip.
*/
OUTB (nc_istat, 0x00 ); /* Remove Reset, abort */
UDELAY (2000); /* The 895 needs time for the bus mode to settle */
OUTB (nc_scntl0, np->rv_scntl0 | 0xc0);
/* full arb., ena parity, par->ATN */
OUTB (nc_scntl1, 0x00); /* odd parity, and remove CRST!! */
sym_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
OUTB (nc_scid , RRE|np->myaddr); /* Adapter SCSI address */
OUTW (nc_respid, 1ul<<np->myaddr); /* Id to respond to */
OUTB (nc_istat , SIGP ); /* Signal Process */
OUTB (nc_dmode , np->rv_dmode); /* Burst length, dma mode */
OUTB (nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */
OUTB (nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */
OUTB (nc_ctest3, np->rv_ctest3); /* Write and invalidate */
OUTB (nc_ctest4, np->rv_ctest4); /* Master parity checking */
/* Extended Sreq/Sack filtering not supported on the C10 */
if (np->features & FE_C10)
OUTB (nc_stest2, np->rv_stest2);
else
OUTB (nc_stest2, EXT|np->rv_stest2);
OUTB (nc_stest3, TE); /* TolerANT enable */
OUTB (nc_stime0, 0x0c); /* HTH disabled STO 0.25 sec */
/*
* For now, disable AIP generation on C1010-66.
*/
if (np->device_id == PCI_ID_LSI53C1010_2)
OUTB (nc_aipcntl1, DISAIP);
/*
* C10101 Errata.
* Errant SGE's when in narrow. Write bits 4 & 5 of
* STEST1 register to disable SGE. We probably should do
* that from SCRIPTS for each selection/reselection, but
* I just don't want. :)
*/
if (np->device_id == PCI_ID_LSI53C1010 &&
/* np->revision_id < 0xff */ 1)
OUTB (nc_stest1, INB(nc_stest1) | 0x30);
/*
* DEL 441 - 53C876 Rev 5 - Part Number 609-0392787/2788 - ITEM 2.
* Disable overlapped arbitration for some dual function devices,
* regardless revision id (kind of post-chip-design feature. ;-))
*/
if (np->device_id == PCI_ID_SYM53C875)
OUTB (nc_ctest0, (1<<5));
else if (np->device_id == PCI_ID_SYM53C896)
np->rv_ccntl0 |= DPR;
/*
* Write CCNTL0/CCNTL1 for chips capable of 64 bit addressing
* and/or hardware phase mismatch, since only such chips
* seem to support those IO registers.
*/
if (np->features & (FE_DAC|FE_NOPM)) {
OUTB (nc_ccntl0, np->rv_ccntl0);
OUTB (nc_ccntl1, np->rv_ccntl1);
}
/*
* If phase mismatch handled by scripts (895A/896/1010),
* set PM jump addresses.
*/
if (np->features & FE_NOPM) {
OUTL (nc_pmjad1, SCRIPTB_BA (np, pm_handle));
OUTL (nc_pmjad2, SCRIPTB_BA (np, pm_handle));
}
/*
* Enable GPIO0 pin for writing if LED support from SCRIPTS.
* Also set GPIO5 and clear GPIO6 if hardware LED control.
*/
if (np->features & FE_LED0)
OUTB(nc_gpcntl, INB(nc_gpcntl) & ~0x01);
else if (np->features & FE_LEDC)
OUTB(nc_gpcntl, (INB(nc_gpcntl) & ~0x41) | 0x20);
/*
* enable ints
*/
OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR);
OUTB (nc_dien , MDPE|BF|SSI|SIR|IID);
/*
* For 895/6 enable SBMC interrupt and save current SCSI bus mode.
* Try to eat the spurious SBMC interrupt that may occur when
* we reset the chip but not the SCSI BUS (at initialization).
*/
if (np->features & (FE_ULTRA2|FE_ULTRA3)) {
OUTONW (nc_sien, SBMC);
if (reason == 0) {
MDELAY(100);
INW (nc_sist);
}
np->scsi_mode = INB (nc_stest4) & SMODE;
}
/*
* Fill in target structure.
* Reinitialize usrsync.
* Reinitialize usrwide.
* Prepare sync negotiation according to actual SCSI bus mode.
*/
for (i=0;i<SYM_CONF_MAX_TARGET;i++) {
tcb_p tp = &np->target[i];
tp->to_reset = 0;
tp->head.sval = 0;
tp->head.wval = np->rv_scntl3;
tp->head.uval = 0;
tp->tinfo.current.period = 0;
tp->tinfo.current.offset = 0;
tp->tinfo.current.width = BUS_8_BIT;
tp->tinfo.current.options = 0;
}
/*
* Download SCSI SCRIPTS to on-chip RAM if present,
* and start script processor.
*/
if (np->ram_ba) {
if (sym_verbose > 1)
printf ("%s: Downloading SCSI SCRIPTS.\n",
sym_name(np));
if (np->ram_ws == 8192) {
OUTRAM_OFF(4096, np->scriptb0, np->scriptb_sz);
OUTL (nc_mmws, np->scr_ram_seg);
OUTL (nc_mmrs, np->scr_ram_seg);
OUTL (nc_sfs, np->scr_ram_seg);
phys = SCRIPTB_BA (np, start64);
}
else
phys = SCRIPTA_BA (np, init);
OUTRAM_OFF(0, np->scripta0, np->scripta_sz);
}
else
phys = SCRIPTA_BA (np, init);
np->istat_sem = 0;
OUTL (nc_dsa, np->hcb_ba);
OUTL_DSP (phys);
/*
* Notify the XPT about the RESET condition.
*/
if (reason != 0)
xpt_async(AC_BUS_RESET, np->path, NULL);
}
/*
* Get clock factor and sync divisor for a given
* synchronous factor period.
*/
static int
sym_getsync(hcb_p np, u_char dt, u_char sfac, u_char *divp, u_char *fakp)
{
u32 clk = np->clock_khz; /* SCSI clock frequency in kHz */
int div = np->clock_divn; /* Number of divisors supported */
u32 fak; /* Sync factor in sxfer */
u32 per; /* Period in tenths of ns */
u32 kpc; /* (per * clk) */
int ret;
/*
* Compute the synchronous period in tenths of nano-seconds
*/
if (dt && sfac <= 9) per = 125;
else if (sfac <= 10) per = 250;
else if (sfac == 11) per = 303;
else if (sfac == 12) per = 500;
else per = 40 * sfac;
ret = per;
kpc = per * clk;
if (dt)
kpc <<= 1;
/*
* For earliest C10 revision 0, we cannot use extra
* clocks for the setting of the SCSI clocking.
* Note that this limits the lowest sync data transfer
* to 5 Mega-transfers per second and may result in
* using higher clock divisors.
*/
#if 1
if ((np->features & (FE_C10|FE_U3EN)) == FE_C10) {
/*
* Look for the lowest clock divisor that allows an
* output speed not faster than the period.
*/
while (div > 0) {
--div;
if (kpc > (div_10M[div] << 2)) {
++div;
break;
}
}
fak = 0; /* No extra clocks */
if (div == np->clock_divn) { /* Are we too fast ? */
ret = -1;
}
*divp = div;
*fakp = fak;
return ret;
}
#endif
/*
* Look for the greatest clock divisor that allows an
* input speed faster than the period.
*/
while (div-- > 0)
if (kpc >= (div_10M[div] << 2)) break;
/*
* Calculate the lowest clock factor that allows an output
* speed not faster than the period, and the max output speed.
* If fak >= 1 we will set both XCLKH_ST and XCLKH_DT.
* If fak >= 2 we will also set XCLKS_ST and XCLKS_DT.
*/
if (dt) {
fak = (kpc - 1) / (div_10M[div] << 1) + 1 - 2;
/* ret = ((2+fak)*div_10M[div])/np->clock_khz; */
}
else {
fak = (kpc - 1) / div_10M[div] + 1 - 4;
/* ret = ((4+fak)*div_10M[div])/np->clock_khz; */
}
/*
* Check against our hardware limits, or bugs :).
*/
if (fak > 2) {fak = 2; ret = -1;}
/*
* Compute and return sync parameters.
*/
*divp = div;
*fakp = fak;
return ret;
}
/*
* Tell the SCSI layer about the new transfer parameters.
*/
static void
sym_xpt_async_transfer_neg(hcb_p np, int target, u_int spi_valid)
{
struct ccb_trans_settings cts;
struct cam_path *path;
int sts;
tcb_p tp = &np->target[target];
sts = xpt_create_path(&path, NULL, cam_sim_path(np->sim), target,
CAM_LUN_WILDCARD);
if (sts != CAM_REQ_CMP)
return;
bzero(&cts, sizeof(cts));
#define cts__scsi (cts.proto_specific.scsi)
#define cts__spi (cts.xport_specific.spi)
cts.type = CTS_TYPE_CURRENT_SETTINGS;
cts.protocol = PROTO_SCSI;
cts.transport = XPORT_SPI;
cts.protocol_version = tp->tinfo.current.scsi_version;
cts.transport_version = tp->tinfo.current.spi_version;
cts__spi.valid = spi_valid;
if (spi_valid & CTS_SPI_VALID_SYNC_RATE)
cts__spi.sync_period = tp->tinfo.current.period;
if (spi_valid & CTS_SPI_VALID_SYNC_OFFSET)
cts__spi.sync_offset = tp->tinfo.current.offset;
if (spi_valid & CTS_SPI_VALID_BUS_WIDTH)
cts__spi.bus_width = tp->tinfo.current.width;
if (spi_valid & CTS_SPI_VALID_PPR_OPTIONS)
cts__spi.ppr_options = tp->tinfo.current.options;
#undef cts__spi
#undef cts__scsi
xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
xpt_async(AC_TRANSFER_NEG, path, &cts);
xpt_free_path(path);
}
#define SYM_SPI_VALID_WDTR \
CTS_SPI_VALID_BUS_WIDTH | \
CTS_SPI_VALID_SYNC_RATE | \
CTS_SPI_VALID_SYNC_OFFSET
#define SYM_SPI_VALID_SDTR \
CTS_SPI_VALID_SYNC_RATE | \
CTS_SPI_VALID_SYNC_OFFSET
#define SYM_SPI_VALID_PPR \
CTS_SPI_VALID_PPR_OPTIONS | \
CTS_SPI_VALID_BUS_WIDTH | \
CTS_SPI_VALID_SYNC_RATE | \
CTS_SPI_VALID_SYNC_OFFSET
/*
* We received a WDTR.
* Let everything be aware of the changes.
*/
static void sym_setwide(hcb_p np, ccb_p cp, u_char wide)
{
tcb_p tp = &np->target[cp->target];
sym_settrans(np, cp, 0, 0, 0, wide, 0, 0);
/*
* Tell the SCSI layer about the new transfer parameters.
*/
tp->tinfo.goal.width = tp->tinfo.current.width = wide;
tp->tinfo.current.offset = 0;
tp->tinfo.current.period = 0;
tp->tinfo.current.options = 0;
sym_xpt_async_transfer_neg(np, cp->target, SYM_SPI_VALID_WDTR);
}
/*
* We received a SDTR.
* Let everything be aware of the changes.
*/
static void
sym_setsync(hcb_p np, ccb_p cp, u_char ofs, u_char per, u_char div, u_char fak)
{
tcb_p tp = &np->target[cp->target];
u_char wide = (cp->phys.select.sel_scntl3 & EWS) ? 1 : 0;
sym_settrans(np, cp, 0, ofs, per, wide, div, fak);
/*
* Tell the SCSI layer about the new transfer parameters.
*/
tp->tinfo.goal.period = tp->tinfo.current.period = per;
tp->tinfo.goal.offset = tp->tinfo.current.offset = ofs;
tp->tinfo.goal.options = tp->tinfo.current.options = 0;
sym_xpt_async_transfer_neg(np, cp->target, SYM_SPI_VALID_SDTR);
}
/*
* We received a PPR.
* Let everything be aware of the changes.
*/
static void sym_setpprot(hcb_p np, ccb_p cp, u_char dt, u_char ofs,
u_char per, u_char wide, u_char div, u_char fak)
{
tcb_p tp = &np->target[cp->target];
sym_settrans(np, cp, dt, ofs, per, wide, div, fak);
/*
* Tell the SCSI layer about the new transfer parameters.
*/
tp->tinfo.goal.width = tp->tinfo.current.width = wide;
tp->tinfo.goal.period = tp->tinfo.current.period = per;
tp->tinfo.goal.offset = tp->tinfo.current.offset = ofs;
tp->tinfo.goal.options = tp->tinfo.current.options = dt;
sym_xpt_async_transfer_neg(np, cp->target, SYM_SPI_VALID_PPR);
}
/*
* Switch trans mode for current job and it's target.
*/
static void sym_settrans(hcb_p np, ccb_p cp, u_char dt, u_char ofs,
u_char per, u_char wide, u_char div, u_char fak)
{
SYM_QUEHEAD *qp;
union ccb *ccb;
tcb_p tp;
u_char target = INB (nc_sdid) & 0x0f;
u_char sval, wval, uval;
assert (cp);
if (!cp) return;
ccb = cp->cam_ccb;
assert (ccb);
if (!ccb) return;
assert (target == (cp->target & 0xf));
tp = &np->target[target];
sval = tp->head.sval;
wval = tp->head.wval;
uval = tp->head.uval;
#if 0
printf("XXXX sval=%x wval=%x uval=%x (%x)\n",
sval, wval, uval, np->rv_scntl3);
#endif
/*
* Set the offset.
*/
if (!(np->features & FE_C10))
sval = (sval & ~0x1f) | ofs;
else
sval = (sval & ~0x3f) | ofs;
/*
* Set the sync divisor and extra clock factor.
*/
if (ofs != 0) {
wval = (wval & ~0x70) | ((div+1) << 4);
if (!(np->features & FE_C10))
sval = (sval & ~0xe0) | (fak << 5);
else {
uval = uval & ~(XCLKH_ST|XCLKH_DT|XCLKS_ST|XCLKS_DT);
if (fak >= 1) uval |= (XCLKH_ST|XCLKH_DT);
if (fak >= 2) uval |= (XCLKS_ST|XCLKS_DT);
}
}
/*
* Set the bus width.
*/
wval = wval & ~EWS;
if (wide != 0)
wval |= EWS;
/*
* Set misc. ultra enable bits.
*/
if (np->features & FE_C10) {
uval = uval & ~(U3EN|AIPCKEN);
if (dt) {
assert(np->features & FE_U3EN);
uval |= U3EN;
}
}
else {
wval = wval & ~ULTRA;
if (per <= 12) wval |= ULTRA;
}
/*
* Stop there if sync parameters are unchanged.
*/
if (tp->head.sval == sval &&
tp->head.wval == wval &&
tp->head.uval == uval)
return;
tp->head.sval = sval;
tp->head.wval = wval;
tp->head.uval = uval;
/*
* Disable extended Sreq/Sack filtering if per < 50.
* Not supported on the C1010.
*/
if (per < 50 && !(np->features & FE_C10))
OUTOFFB (nc_stest2, EXT);
/*
* set actual value and sync_status
*/
OUTB (nc_sxfer, tp->head.sval);
OUTB (nc_scntl3, tp->head.wval);
if (np->features & FE_C10) {
OUTB (nc_scntl4, tp->head.uval);
}
/*
* patch ALL busy ccbs of this target.
*/
FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
if (cp->target != target)
continue;
cp->phys.select.sel_scntl3 = tp->head.wval;
cp->phys.select.sel_sxfer = tp->head.sval;
if (np->features & FE_C10) {
cp->phys.select.sel_scntl4 = tp->head.uval;
}
}
}
/*
* log message for real hard errors
*
* sym0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc).
* reg: r0 r1 r2 r3 r4 r5 r6 ..... rf.
*
* exception register:
* ds: dstat
* si: sist
*
* SCSI bus lines:
* so: control lines as driven by chip.
* si: control lines as seen by chip.
* sd: scsi data lines as seen by chip.
*
* wide/fastmode:
* sxfer: (see the manual)
* scntl3: (see the manual)
*
* current script command:
* dsp: script address (relative to start of script).
* dbc: first word of script command.
*
* First 24 register of the chip:
* r0..rf
*/
static void sym_log_hard_error(hcb_p np, u_short sist, u_char dstat)
{
u32 dsp;
int script_ofs;
int script_size;
char *script_name;
u_char *script_base;
int i;
dsp = INL (nc_dsp);
if (dsp > np->scripta_ba &&
dsp <= np->scripta_ba + np->scripta_sz) {
script_ofs = dsp - np->scripta_ba;
script_size = np->scripta_sz;
script_base = (u_char *) np->scripta0;
script_name = "scripta";
}
else if (np->scriptb_ba < dsp &&
dsp <= np->scriptb_ba + np->scriptb_sz) {
script_ofs = dsp - np->scriptb_ba;
script_size = np->scriptb_sz;
script_base = (u_char *) np->scriptb0;
script_name = "scriptb";
} else {
script_ofs = dsp;
script_size = 0;
script_base = NULL;
script_name = "mem";
}
printf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
sym_name (np), (unsigned)INB (nc_sdid)&0x0f, dstat, sist,
(unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl),
(unsigned)INB (nc_sbdl), (unsigned)INB (nc_sxfer),
(unsigned)INB (nc_scntl3), script_name, script_ofs,
(unsigned)INL (nc_dbc));
if (((script_ofs & 3) == 0) &&
(unsigned)script_ofs < script_size) {
printf ("%s: script cmd = %08x\n", sym_name(np),
scr_to_cpu((int) *(u32 *)(script_base + script_ofs)));
}
printf ("%s: regdump:", sym_name(np));
for (i=0; i<24;i++)
printf (" %02x", (unsigned)INB_OFF(i));
printf (".\n");
/*
* PCI BUS error, read the PCI ststus register.
*/
if (dstat & (MDPE|BF)) {
u_short pci_sts;
pci_sts = pci_read_config(np->device, PCIR_STATUS, 2);
if (pci_sts & 0xf900) {
pci_write_config(np->device, PCIR_STATUS, pci_sts, 2);
printf("%s: PCI STATUS = 0x%04x\n",
sym_name(np), pci_sts & 0xf900);
}
}
}
/*
* chip interrupt handler
*
* In normal situations, interrupt conditions occur one at
* a time. But when something bad happens on the SCSI BUS,
* the chip may raise several interrupt flags before
* stopping and interrupting the CPU. The additionnal
* interrupt flags are stacked in some extra registers
* after the SIP and/or DIP flag has been raised in the
* ISTAT. After the CPU has read the interrupt condition
* flag from SIST or DSTAT, the chip unstacks the other
* interrupt flags and sets the corresponding bits in
* SIST or DSTAT. Since the chip starts stacking once the
* SIP or DIP flag is set, there is a small window of time
* where the stacking does not occur.
*
* Typically, multiple interrupt conditions may happen in
* the following situations:
*
* - SCSI parity error + Phase mismatch (PAR|MA)
* When a parity error is detected in input phase
* and the device switches to msg-in phase inside a
* block MOV.
* - SCSI parity error + Unexpected disconnect (PAR|UDC)
* When a stupid device does not want to handle the
* recovery of an SCSI parity error.
* - Some combinations of STO, PAR, UDC, ...
* When using non compliant SCSI stuff, when user is
* doing non compliant hot tampering on the BUS, when
* something really bad happens to a device, etc ...
*
* The heuristic suggested by SYMBIOS to handle
* multiple interrupts is to try unstacking all
* interrupts conditions and to handle them on some
* priority based on error severity.
* This will work when the unstacking has been
* successful, but we cannot be 100 % sure of that,
* since the CPU may have been faster to unstack than
* the chip is able to stack. Hmmm ... But it seems that
* such a situation is very unlikely to happen.
*
* If this happen, for example STO caught by the CPU
* then UDC happenning before the CPU have restarted
* the SCRIPTS, the driver may wrongly complete the
* same command on UDC, since the SCRIPTS didn't restart
* and the DSA still points to the same command.
* We avoid this situation by setting the DSA to an
* invalid value when the CCB is completed and before
* restarting the SCRIPTS.
*
* Another issue is that we need some section of our
* recovery procedures to be somehow uninterruptible but
* the SCRIPTS processor does not provides such a
* feature. For this reason, we handle recovery preferently
* from the C code and check against some SCRIPTS critical
* sections from the C code.
*
* Hopefully, the interrupt handling of the driver is now
* able to resist to weird BUS error conditions, but donnot
* ask me for any guarantee that it will never fail. :-)
* Use at your own decision and risk.
*/
static void sym_intr1 (hcb_p np)
{
u_char istat, istatc;
u_char dstat;
u_short sist;
SYM_LOCK_ASSERT(MA_OWNED);
/*
* interrupt on the fly ?
*
* A `dummy read' is needed to ensure that the
* clear of the INTF flag reaches the device
* before the scanning of the DONE queue.
*/
istat = INB (nc_istat);
if (istat & INTF) {
OUTB (nc_istat, (istat & SIGP) | INTF | np->istat_sem);
istat = INB (nc_istat); /* DUMMY READ */
if (DEBUG_FLAGS & DEBUG_TINY) printf ("F ");
(void)sym_wakeup_done (np);
}
if (!(istat & (SIP|DIP)))
return;
#if 0 /* We should never get this one */
if (istat & CABRT)
OUTB (nc_istat, CABRT);
#endif
/*
* PAR and MA interrupts may occur at the same time,
* and we need to know of both in order to handle
* this situation properly. We try to unstack SCSI
* interrupts for that reason. BTW, I dislike a LOT
* such a loop inside the interrupt routine.
* Even if DMA interrupt stacking is very unlikely to
* happen, we also try unstacking these ones, since
* this has no performance impact.
*/
sist = 0;
dstat = 0;
istatc = istat;
do {
if (istatc & SIP)
sist |= INW (nc_sist);
if (istatc & DIP)
dstat |= INB (nc_dstat);
istatc = INB (nc_istat);
istat |= istatc;
} while (istatc & (SIP|DIP));
if (DEBUG_FLAGS & DEBUG_TINY)
printf ("<%d|%x:%x|%x:%x>",
(int)INB(nc_scr0),
dstat,sist,
(unsigned)INL(nc_dsp),
(unsigned)INL(nc_dbc));
/*
* On paper, a memory barrier may be needed here.
* And since we are paranoid ... :)
*/
MEMORY_BARRIER();
/*
* First, interrupts we want to service cleanly.
*
* Phase mismatch (MA) is the most frequent interrupt
* for chip earlier than the 896 and so we have to service
* it as quickly as possible.
* A SCSI parity error (PAR) may be combined with a phase
* mismatch condition (MA).
* Programmed interrupts (SIR) are used to call the C code
* from SCRIPTS.
* The single step interrupt (SSI) is not used in this
* driver.
*/
if (!(sist & (STO|GEN|HTH|SGE|UDC|SBMC|RST)) &&
!(dstat & (MDPE|BF|ABRT|IID))) {
if (sist & PAR) sym_int_par (np, sist);
else if (sist & MA) sym_int_ma (np);
else if (dstat & SIR) sym_int_sir (np);
else if (dstat & SSI) OUTONB_STD ();
else goto unknown_int;
return;
}
/*
* Now, interrupts that donnot happen in normal
* situations and that we may need to recover from.
*
* On SCSI RESET (RST), we reset everything.
* On SCSI BUS MODE CHANGE (SBMC), we complete all
* active CCBs with RESET status, prepare all devices
* for negotiating again and restart the SCRIPTS.
* On STO and UDC, we complete the CCB with the corres-
* ponding status and restart the SCRIPTS.
*/
if (sist & RST) {
xpt_print_path(np->path);
printf("SCSI BUS reset detected.\n");
sym_init (np, 1);
return;
}
OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
if (!(sist & (GEN|HTH|SGE)) &&
!(dstat & (MDPE|BF|ABRT|IID))) {
if (sist & SBMC) sym_int_sbmc (np);
else if (sist & STO) sym_int_sto (np);
else if (sist & UDC) sym_int_udc (np);
else goto unknown_int;
return;
}
/*
* Now, interrupts we are not able to recover cleanly.
*
* Log message for hard errors.
* Reset everything.
*/
sym_log_hard_error(np, sist, dstat);
if ((sist & (GEN|HTH|SGE)) ||
(dstat & (MDPE|BF|ABRT|IID))) {
sym_start_reset(np);
return;
}
unknown_int:
/*
* We just miss the cause of the interrupt. :(
* Print a message. The timeout will do the real work.
*/
printf( "%s: unknown interrupt(s) ignored, "
"ISTAT=0x%x DSTAT=0x%x SIST=0x%x\n",
sym_name(np), istat, dstat, sist);
}
static void sym_intr(void *arg)
{
hcb_p np = arg;
SYM_LOCK();
if (DEBUG_FLAGS & DEBUG_TINY) printf ("[");
sym_intr1((hcb_p) arg);
if (DEBUG_FLAGS & DEBUG_TINY) printf ("]");
SYM_UNLOCK();
}
static void sym_poll(struct cam_sim *sim)
{
sym_intr1(cam_sim_softc(sim));
}
/*
* generic recovery from scsi interrupt
*
* The doc says that when the chip gets an SCSI interrupt,
* it tries to stop in an orderly fashion, by completing
* an instruction fetch that had started or by flushing
* the DMA fifo for a write to memory that was executing.
* Such a fashion is not enough to know if the instruction
* that was just before the current DSP value has been
* executed or not.
*
* There are some small SCRIPTS sections that deal with
* the start queue and the done queue that may break any
* assomption from the C code if we are interrupted
* inside, so we reset if this happens. Btw, since these
* SCRIPTS sections are executed while the SCRIPTS hasn't
* started SCSI operations, it is very unlikely to happen.
*
* All the driver data structures are supposed to be
* allocated from the same 4 GB memory window, so there
* is a 1 to 1 relationship between DSA and driver data
* structures. Since we are careful :) to invalidate the
* DSA when we complete a command or when the SCRIPTS
* pushes a DSA into a queue, we can trust it when it
* points to a CCB.
*/
static void sym_recover_scsi_int (hcb_p np, u_char hsts)
{
u32 dsp = INL (nc_dsp);
u32 dsa = INL (nc_dsa);
ccb_p cp = sym_ccb_from_dsa(np, dsa);
/*
* If we haven't been interrupted inside the SCRIPTS
* critical paths, we can safely restart the SCRIPTS
* and trust the DSA value if it matches a CCB.
*/
if ((!(dsp > SCRIPTA_BA (np, getjob_begin) &&
dsp < SCRIPTA_BA (np, getjob_end) + 1)) &&
(!(dsp > SCRIPTA_BA (np, ungetjob) &&
dsp < SCRIPTA_BA (np, reselect) + 1)) &&
(!(dsp > SCRIPTB_BA (np, sel_for_abort) &&
dsp < SCRIPTB_BA (np, sel_for_abort_1) + 1)) &&
(!(dsp > SCRIPTA_BA (np, done) &&
dsp < SCRIPTA_BA (np, done_end) + 1))) {
OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
/*
* If we have a CCB, let the SCRIPTS call us back for
* the handling of the error with SCRATCHA filled with
* STARTPOS. This way, we will be able to freeze the
* device queue and requeue awaiting IOs.
*/
if (cp) {
cp->host_status = hsts;
OUTL_DSP (SCRIPTA_BA (np, complete_error));
}
/*
* Otherwise just restart the SCRIPTS.
*/
else {
OUTL (nc_dsa, 0xffffff);
OUTL_DSP (SCRIPTA_BA (np, start));
}
}
else
goto reset_all;
return;
reset_all:
sym_start_reset(np);
}
/*
* chip exception handler for selection timeout
*/
static void sym_int_sto (hcb_p np)
{
u32 dsp = INL (nc_dsp);
if (DEBUG_FLAGS & DEBUG_TINY) printf ("T");
if (dsp == SCRIPTA_BA (np, wf_sel_done) + 8)
sym_recover_scsi_int(np, HS_SEL_TIMEOUT);
else
sym_start_reset(np);
}
/*
* chip exception handler for unexpected disconnect
*/
static void sym_int_udc (hcb_p np)
{
printf ("%s: unexpected disconnect\n", sym_name(np));
sym_recover_scsi_int(np, HS_UNEXPECTED);
}
/*
* chip exception handler for SCSI bus mode change
*
* spi2-r12 11.2.3 says a transceiver mode change must
* generate a reset event and a device that detects a reset
* event shall initiate a hard reset. It says also that a
* device that detects a mode change shall set data transfer
* mode to eight bit asynchronous, etc...
* So, just reinitializing all except chip should be enough.
*/
static void sym_int_sbmc (hcb_p np)
{
u_char scsi_mode = INB (nc_stest4) & SMODE;
/*
* Notify user.
*/
xpt_print_path(np->path);
printf("SCSI BUS mode change from %s to %s.\n",
sym_scsi_bus_mode(np->scsi_mode), sym_scsi_bus_mode(scsi_mode));
/*
* Should suspend command processing for a few seconds and
* reinitialize all except the chip.
*/
sym_init (np, 2);
}
/*
* chip exception handler for SCSI parity error.
*
* When the chip detects a SCSI parity error and is
* currently executing a (CH)MOV instruction, it does
* not interrupt immediately, but tries to finish the
* transfer of the current scatter entry before
* interrupting. The following situations may occur:
*
* - The complete scatter entry has been transferred
* without the device having changed phase.
* The chip will then interrupt with the DSP pointing
* to the instruction that follows the MOV.
*
* - A phase mismatch occurs before the MOV finished
* and phase errors are to be handled by the C code.
* The chip will then interrupt with both PAR and MA
* conditions set.
*
* - A phase mismatch occurs before the MOV finished and
* phase errors are to be handled by SCRIPTS.
* The chip will load the DSP with the phase mismatch
* JUMP address and interrupt the host processor.
*/
static void sym_int_par (hcb_p np, u_short sist)
{
u_char hsts = INB (HS_PRT);
u32 dsp = INL (nc_dsp);
u32 dbc = INL (nc_dbc);
u32 dsa = INL (nc_dsa);
u_char sbcl = INB (nc_sbcl);
u_char cmd = dbc >> 24;
int phase = cmd & 7;
ccb_p cp = sym_ccb_from_dsa(np, dsa);
printf("%s: SCSI parity error detected: SCR1=%d DBC=%x SBCL=%x\n",
sym_name(np), hsts, dbc, sbcl);
/*
* Check that the chip is connected to the SCSI BUS.
*/
if (!(INB (nc_scntl1) & ISCON)) {
sym_recover_scsi_int(np, HS_UNEXPECTED);
return;
}
/*
* If the nexus is not clearly identified, reset the bus.
* We will try to do better later.
*/
if (!cp)
goto reset_all;
/*
* Check instruction was a MOV, direction was INPUT and
* ATN is asserted.
*/
if ((cmd & 0xc0) || !(phase & 1) || !(sbcl & 0x8))
goto reset_all;
/*
* Keep track of the parity error.
*/
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_PARITY_ERR;
/*
* Prepare the message to send to the device.
*/
np->msgout[0] = (phase == 7) ? M_PARITY : M_ID_ERROR;
/*
* If the old phase was DATA IN phase, we have to deal with
* the 3 situations described above.
* For other input phases (MSG IN and STATUS), the device
* must resend the whole thing that failed parity checking
* or signal error. So, jumping to dispatcher should be OK.
*/
if (phase == 1 || phase == 5) {
/* Phase mismatch handled by SCRIPTS */
if (dsp == SCRIPTB_BA (np, pm_handle))
OUTL_DSP (dsp);
/* Phase mismatch handled by the C code */
else if (sist & MA)
sym_int_ma (np);
/* No phase mismatch occurred */
else {
OUTL (nc_temp, dsp);
OUTL_DSP (SCRIPTA_BA (np, dispatch));
}
}
else
OUTL_DSP (SCRIPTA_BA (np, clrack));
return;
reset_all:
sym_start_reset(np);
}
/*
* chip exception handler for phase errors.
*
* We have to construct a new transfer descriptor,
* to transfer the rest of the current block.
*/
static void sym_int_ma (hcb_p np)
{
u32 dbc;
u32 rest;
u32 dsp;
u32 dsa;
u32 nxtdsp;
u32 *vdsp;
u32 oadr, olen;
u32 *tblp;
u32 newcmd;
u_int delta;
u_char cmd;
u_char hflags, hflags0;
struct sym_pmc *pm;
ccb_p cp;
dsp = INL (nc_dsp);
dbc = INL (nc_dbc);
dsa = INL (nc_dsa);
cmd = dbc >> 24;
rest = dbc & 0xffffff;
delta = 0;
/*
* locate matching cp if any.
*/
cp = sym_ccb_from_dsa(np, dsa);
/*
* Donnot take into account dma fifo and various buffers in
* INPUT phase since the chip flushes everything before
* raising the MA interrupt for interrupted INPUT phases.
* For DATA IN phase, we will check for the SWIDE later.
*/
if ((cmd & 7) != 1 && (cmd & 7) != 5) {
u_char ss0, ss2;
if (np->features & FE_DFBC)
delta = INW (nc_dfbc);
else {
u32 dfifo;
/*
* Read DFIFO, CTEST[4-6] using 1 PCI bus ownership.
*/
dfifo = INL(nc_dfifo);
/*
* Calculate remaining bytes in DMA fifo.
* (CTEST5 = dfifo >> 16)
*/
if (dfifo & (DFS << 16))
delta = ((((dfifo >> 8) & 0x300) |
(dfifo & 0xff)) - rest) & 0x3ff;
else
delta = ((dfifo & 0xff) - rest) & 0x7f;
}
/*
* The data in the dma fifo has not been transferred to
* the target -> add the amount to the rest
* and clear the data.
* Check the sstat2 register in case of wide transfer.
*/
rest += delta;
ss0 = INB (nc_sstat0);
if (ss0 & OLF) rest++;
if (!(np->features & FE_C10))
if (ss0 & ORF) rest++;
if (cp && (cp->phys.select.sel_scntl3 & EWS)) {
ss2 = INB (nc_sstat2);
if (ss2 & OLF1) rest++;
if (!(np->features & FE_C10))
if (ss2 & ORF1) rest++;
}
/*
* Clear fifos.
*/
OUTB (nc_ctest3, np->rv_ctest3 | CLF); /* dma fifo */
OUTB (nc_stest3, TE|CSF); /* scsi fifo */
}
/*
* log the information
*/
if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
printf ("P%x%x RL=%d D=%d ", cmd&7, INB(nc_sbcl)&7,
(unsigned) rest, (unsigned) delta);
/*
* try to find the interrupted script command,
* and the address at which to continue.
*/
vdsp = NULL;
nxtdsp = 0;
if (dsp > np->scripta_ba &&
dsp <= np->scripta_ba + np->scripta_sz) {
vdsp = (u32 *)((char*)np->scripta0 + (dsp-np->scripta_ba-8));
nxtdsp = dsp;
}
else if (dsp > np->scriptb_ba &&
dsp <= np->scriptb_ba + np->scriptb_sz) {
vdsp = (u32 *)((char*)np->scriptb0 + (dsp-np->scriptb_ba-8));
nxtdsp = dsp;
}
/*
* log the information
*/
if (DEBUG_FLAGS & DEBUG_PHASE) {
printf ("\nCP=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
cp, (unsigned)dsp, (unsigned)nxtdsp, vdsp, cmd);
}
if (!vdsp) {
printf ("%s: interrupted SCRIPT address not found.\n",
sym_name (np));
goto reset_all;
}
if (!cp) {
printf ("%s: SCSI phase error fixup: CCB already dequeued.\n",
sym_name (np));
goto reset_all;
}
/*
* get old startaddress and old length.
*/
oadr = scr_to_cpu(vdsp[1]);
if (cmd & 0x10) { /* Table indirect */
tblp = (u32 *) ((char*) &cp->phys + oadr);
olen = scr_to_cpu(tblp[0]);
oadr = scr_to_cpu(tblp[1]);
} else {
tblp = (u32 *) 0;
olen = scr_to_cpu(vdsp[0]) & 0xffffff;
}
if (DEBUG_FLAGS & DEBUG_PHASE) {
printf ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
(unsigned) (scr_to_cpu(vdsp[0]) >> 24),
tblp,
(unsigned) olen,
(unsigned) oadr);
}
/*
* check cmd against assumed interrupted script command.
* If dt data phase, the MOVE instruction hasn't bit 4 of
* the phase.
*/
if (((cmd & 2) ? cmd : (cmd & ~4)) != (scr_to_cpu(vdsp[0]) >> 24)) {
PRINT_ADDR(cp);
printf ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
(unsigned)cmd, (unsigned)scr_to_cpu(vdsp[0]) >> 24);
goto reset_all;
}
/*
* if old phase not dataphase, leave here.
*/
if (cmd & 2) {
PRINT_ADDR(cp);
printf ("phase change %x-%x %d@%08x resid=%d.\n",
cmd&7, INB(nc_sbcl)&7, (unsigned)olen,
(unsigned)oadr, (unsigned)rest);
goto unexpected_phase;
}
/*
* Choose the correct PM save area.
*
* Look at the PM_SAVE SCRIPT if you want to understand
* this stuff. The equivalent code is implemented in
* SCRIPTS for the 895A, 896 and 1010 that are able to
* handle PM from the SCRIPTS processor.
*/
hflags0 = INB (HF_PRT);
hflags = hflags0;
if (hflags & (HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED)) {
if (hflags & HF_IN_PM0)
nxtdsp = scr_to_cpu(cp->phys.pm0.ret);
else if (hflags & HF_IN_PM1)
nxtdsp = scr_to_cpu(cp->phys.pm1.ret);
if (hflags & HF_DP_SAVED)
hflags ^= HF_ACT_PM;
}
if (!(hflags & HF_ACT_PM)) {
pm = &cp->phys.pm0;
newcmd = SCRIPTA_BA (np, pm0_data);
}
else {
pm = &cp->phys.pm1;
newcmd = SCRIPTA_BA (np, pm1_data);
}
hflags &= ~(HF_IN_PM0 | HF_IN_PM1 | HF_DP_SAVED);
if (hflags != hflags0)
OUTB (HF_PRT, hflags);
/*
* fillin the phase mismatch context
*/
pm->sg.addr = cpu_to_scr(oadr + olen - rest);
pm->sg.size = cpu_to_scr(rest);
pm->ret = cpu_to_scr(nxtdsp);
/*
* If we have a SWIDE,
* - prepare the address to write the SWIDE from SCRIPTS,
* - compute the SCRIPTS address to restart from,
* - move current data pointer context by one byte.
*/
nxtdsp = SCRIPTA_BA (np, dispatch);
if ((cmd & 7) == 1 && cp && (cp->phys.select.sel_scntl3 & EWS) &&
(INB (nc_scntl2) & WSR)) {
u32 tmp;
/*
* Set up the table indirect for the MOVE
* of the residual byte and adjust the data
* pointer context.
*/
tmp = scr_to_cpu(pm->sg.addr);
cp->phys.wresid.addr = cpu_to_scr(tmp);
pm->sg.addr = cpu_to_scr(tmp + 1);
tmp = scr_to_cpu(pm->sg.size);
cp->phys.wresid.size = cpu_to_scr((tmp&0xff000000) | 1);
pm->sg.size = cpu_to_scr(tmp - 1);
/*
* If only the residual byte is to be moved,
* no PM context is needed.
*/
if ((tmp&0xffffff) == 1)
newcmd = pm->ret;
/*
* Prepare the address of SCRIPTS that will
* move the residual byte to memory.
*/
nxtdsp = SCRIPTB_BA (np, wsr_ma_helper);
}
if (DEBUG_FLAGS & DEBUG_PHASE) {
PRINT_ADDR(cp);
printf ("PM %x %x %x / %x %x %x.\n",
hflags0, hflags, newcmd,
(unsigned)scr_to_cpu(pm->sg.addr),
(unsigned)scr_to_cpu(pm->sg.size),
(unsigned)scr_to_cpu(pm->ret));
}
/*
* Restart the SCRIPTS processor.
*/
OUTL (nc_temp, newcmd);
OUTL_DSP (nxtdsp);
return;
/*
* Unexpected phase changes that occurs when the current phase
* is not a DATA IN or DATA OUT phase are due to error conditions.
* Such event may only happen when the SCRIPTS is using a
* multibyte SCSI MOVE.
*
* Phase change Some possible cause
*
* COMMAND --> MSG IN SCSI parity error detected by target.
* COMMAND --> STATUS Bad command or refused by target.
* MSG OUT --> MSG IN Message rejected by target.
* MSG OUT --> COMMAND Bogus target that discards extended
* negotiation messages.
*
* The code below does not care of the new phase and so
* trusts the target. Why to annoy it ?
* If the interrupted phase is COMMAND phase, we restart at
* dispatcher.
* If a target does not get all the messages after selection,
* the code assumes blindly that the target discards extended
* messages and clears the negotiation status.
* If the target does not want all our response to negotiation,
* we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids
* bloat for such a should_not_happen situation).
* In all other situation, we reset the BUS.
* Are these assumptions reasonnable ? (Wait and see ...)
*/
unexpected_phase:
dsp -= 8;
nxtdsp = 0;
switch (cmd & 7) {
case 2: /* COMMAND phase */
nxtdsp = SCRIPTA_BA (np, dispatch);
break;
#if 0
case 3: /* STATUS phase */
nxtdsp = SCRIPTA_BA (np, dispatch);
break;
#endif
case 6: /* MSG OUT phase */
/*
* If the device may want to use untagged when we want
* tagged, we prepare an IDENTIFY without disc. granted,
* since we will not be able to handle reselect.
* Otherwise, we just don't care.
*/
if (dsp == SCRIPTA_BA (np, send_ident)) {
if (cp->tag != NO_TAG && olen - rest <= 3) {
cp->host_status = HS_BUSY;
np->msgout[0] = M_IDENTIFY | cp->lun;
nxtdsp = SCRIPTB_BA (np, ident_break_atn);
}
else
nxtdsp = SCRIPTB_BA (np, ident_break);
}
else if (dsp == SCRIPTB_BA (np, send_wdtr) ||
dsp == SCRIPTB_BA (np, send_sdtr) ||
dsp == SCRIPTB_BA (np, send_ppr)) {
nxtdsp = SCRIPTB_BA (np, nego_bad_phase);
}
break;
#if 0
case 7: /* MSG IN phase */
nxtdsp = SCRIPTA_BA (np, clrack);
break;
#endif
}
if (nxtdsp) {
OUTL_DSP (nxtdsp);
return;
}
reset_all:
sym_start_reset(np);
}
/*
* Dequeue from the START queue all CCBs that match
* a given target/lun/task condition (-1 means all),
* and move them from the BUSY queue to the COMP queue
* with CAM_REQUEUE_REQ status condition.
* This function is used during error handling/recovery.
* It is called with SCRIPTS not running.
*/
static int
sym_dequeue_from_squeue(hcb_p np, int i, int target, int lun, int task)
{
int j;
ccb_p cp;
/*
* Make sure the starting index is within range.
*/
assert((i >= 0) && (i < 2*MAX_QUEUE));
/*
* Walk until end of START queue and dequeue every job
* that matches the target/lun/task condition.
*/
j = i;
while (i != np->squeueput) {
cp = sym_ccb_from_dsa(np, scr_to_cpu(np->squeue[i]));
assert(cp);
#ifdef SYM_CONF_IARB_SUPPORT
/* Forget hints for IARB, they may be no longer relevant */
cp->host_flags &= ~HF_HINT_IARB;
#endif
if ((target == -1 || cp->target == target) &&
(lun == -1 || cp->lun == lun) &&
(task == -1 || cp->tag == task)) {
sym_set_cam_status(cp->cam_ccb, CAM_REQUEUE_REQ);
sym_remque(&cp->link_ccbq);
sym_insque_tail(&cp->link_ccbq, &np->comp_ccbq);
}
else {
if (i != j)
np->squeue[j] = np->squeue[i];
if ((j += 2) >= MAX_QUEUE*2) j = 0;
}
if ((i += 2) >= MAX_QUEUE*2) i = 0;
}
if (i != j) /* Copy back the idle task if needed */
np->squeue[j] = np->squeue[i];
np->squeueput = j; /* Update our current start queue pointer */
return (i - j) / 2;
}
/*
* Complete all CCBs queued to the COMP queue.
*
* These CCBs are assumed:
* - Not to be referenced either by devices or
* SCRIPTS-related queues and datas.
* - To have to be completed with an error condition
* or requeued.
*
* The device queue freeze count is incremented
* for each CCB that does not prevent this.
* This function is called when all CCBs involved
* in error handling/recovery have been reaped.
*/
static void
sym_flush_comp_queue(hcb_p np, int cam_status)
{
SYM_QUEHEAD *qp;
ccb_p cp;
while ((qp = sym_remque_head(&np->comp_ccbq)) != NULL) {
union ccb *ccb;
cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
sym_insque_tail(&cp->link_ccbq, &np->busy_ccbq);
/* Leave quiet CCBs waiting for resources */
if (cp->host_status == HS_WAIT)
continue;
ccb = cp->cam_ccb;
if (cam_status)
sym_set_cam_status(ccb, cam_status);
sym_freeze_cam_ccb(ccb);
sym_xpt_done(np, ccb, cp);
sym_free_ccb(np, cp);
}
}
/*
* chip handler for bad SCSI status condition
*
* In case of bad SCSI status, we unqueue all the tasks
* currently queued to the controller but not yet started
* and then restart the SCRIPTS processor immediately.
*
* QUEUE FULL and BUSY conditions are handled the same way.
* Basically all the not yet started tasks are requeued in
* device queue and the queue is frozen until a completion.
*
* For CHECK CONDITION and COMMAND TERMINATED status, we use
* the CCB of the failed command to prepare a REQUEST SENSE
* SCSI command and queue it to the controller queue.
*
* SCRATCHA is assumed to have been loaded with STARTPOS
* before the SCRIPTS called the C code.
*/
static void sym_sir_bad_scsi_status(hcb_p np, ccb_p cp)
{
tcb_p tp = &np->target[cp->target];
u32 startp;
u_char s_status = cp->ssss_status;
u_char h_flags = cp->host_flags;
int msglen;
int nego;
int i;
SYM_LOCK_ASSERT(MA_OWNED);
/*
* Compute the index of the next job to start from SCRIPTS.
*/
i = (INL (nc_scratcha) - np->squeue_ba) / 4;
/*
* The last CCB queued used for IARB hint may be
* no longer relevant. Forget it.
*/
#ifdef SYM_CONF_IARB_SUPPORT
if (np->last_cp)
np->last_cp = NULL;
#endif
/*
* Now deal with the SCSI status.
*/
switch(s_status) {
case S_BUSY:
case S_QUEUE_FULL:
if (sym_verbose >= 2) {
PRINT_ADDR(cp);
printf (s_status == S_BUSY ? "BUSY" : "QUEUE FULL\n");
}
/* FALLTHROUGH */
default: /* S_INT, S_INT_COND_MET, S_CONFLICT */
sym_complete_error (np, cp);
break;
case S_TERMINATED:
case S_CHECK_COND:
/*
* If we get an SCSI error when requesting sense, give up.
*/
if (h_flags & HF_SENSE) {
sym_complete_error (np, cp);
break;
}
/*
* Dequeue all queued CCBs for that device not yet started,
* and restart the SCRIPTS processor immediately.
*/
(void) sym_dequeue_from_squeue(np, i, cp->target, cp->lun, -1);
OUTL_DSP (SCRIPTA_BA (np, start));
/*
* Save some info of the actual IO.
* Compute the data residual.
*/
cp->sv_scsi_status = cp->ssss_status;
cp->sv_xerr_status = cp->xerr_status;
cp->sv_resid = sym_compute_residual(np, cp);
/*
* Prepare all needed data structures for
* requesting sense data.
*/
/*
* identify message
*/
cp->scsi_smsg2[0] = M_IDENTIFY | cp->lun;
msglen = 1;
/*
* If we are currently using anything different from
* async. 8 bit data transfers with that target,
* start a negotiation, since the device may want
* to report us a UNIT ATTENTION condition due to
* a cause we currently ignore, and we donnot want
* to be stuck with WIDE and/or SYNC data transfer.
*
* cp->nego_status is filled by sym_prepare_nego().
*/
cp->nego_status = 0;
nego = 0;
if (tp->tinfo.current.options & PPR_OPT_MASK)
nego = NS_PPR;
else if (tp->tinfo.current.width != BUS_8_BIT)
nego = NS_WIDE;
else if (tp->tinfo.current.offset != 0)
nego = NS_SYNC;
if (nego)
msglen +=
sym_prepare_nego (np,cp, nego, &cp->scsi_smsg2[msglen]);
/*
* Message table indirect structure.
*/
cp->phys.smsg.addr = cpu_to_scr(CCB_BA (cp, scsi_smsg2));
cp->phys.smsg.size = cpu_to_scr(msglen);
/*
* sense command
*/
cp->phys.cmd.addr = cpu_to_scr(CCB_BA (cp, sensecmd));
cp->phys.cmd.size = cpu_to_scr(6);
/*
* patch requested size into sense command
*/
cp->sensecmd[0] = 0x03;
cp->sensecmd[1] = cp->lun << 5;
if (tp->tinfo.current.scsi_version > 2 || cp->lun > 7)
cp->sensecmd[1] = 0;
cp->sensecmd[4] = SYM_SNS_BBUF_LEN;
cp->data_len = SYM_SNS_BBUF_LEN;
/*
* sense data
*/
bzero(cp->sns_bbuf, SYM_SNS_BBUF_LEN);
cp->phys.sense.addr = cpu_to_scr(vtobus(cp->sns_bbuf));
cp->phys.sense.size = cpu_to_scr(SYM_SNS_BBUF_LEN);
/*
* requeue the command.
*/
startp = SCRIPTB_BA (np, sdata_in);
cp->phys.head.savep = cpu_to_scr(startp);
cp->phys.head.goalp = cpu_to_scr(startp + 16);
cp->phys.head.lastp = cpu_to_scr(startp);
cp->startp = cpu_to_scr(startp);
cp->actualquirks = SYM_QUIRK_AUTOSAVE;
cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
cp->ssss_status = S_ILLEGAL;
cp->host_flags = (HF_SENSE|HF_DATA_IN);
cp->xerr_status = 0;
cp->extra_bytes = 0;
cp->phys.head.go.start = cpu_to_scr(SCRIPTA_BA (np, select));
/*
* Requeue the command.
*/
sym_put_start_queue(np, cp);
/*
* Give back to upper layer everything we have dequeued.
*/
sym_flush_comp_queue(np, 0);
break;
}
}
/*
* After a device has accepted some management message
* as BUS DEVICE RESET, ABORT TASK, etc ..., or when
* a device signals a UNIT ATTENTION condition, some
* tasks are thrown away by the device. We are required
* to reflect that on our tasks list since the device
* will never complete these tasks.
*
* This function move from the BUSY queue to the COMP
* queue all disconnected CCBs for a given target that
* match the following criteria:
* - lun=-1 means any logical UNIT otherwise a given one.
* - task=-1 means any task, otherwise a given one.
*/
static int
sym_clear_tasks(hcb_p np, int cam_status, int target, int lun, int task)
{
SYM_QUEHEAD qtmp, *qp;
int i = 0;
ccb_p cp;
/*
* Move the entire BUSY queue to our temporary queue.
*/
sym_que_init(&qtmp);
sym_que_splice(&np->busy_ccbq, &qtmp);
sym_que_init(&np->busy_ccbq);
/*
* Put all CCBs that matches our criteria into
* the COMP queue and put back other ones into
* the BUSY queue.
*/
while ((qp = sym_remque_head(&qtmp)) != NULL) {
union ccb *ccb;
cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
ccb = cp->cam_ccb;
if (cp->host_status != HS_DISCONNECT ||
cp->target != target ||
(lun != -1 && cp->lun != lun) ||
(task != -1 &&
(cp->tag != NO_TAG && cp->scsi_smsg[2] != task))) {
sym_insque_tail(&cp->link_ccbq, &np->busy_ccbq);
continue;
}
sym_insque_tail(&cp->link_ccbq, &np->comp_ccbq);
/* Preserve the software timeout condition */
if (sym_get_cam_status(ccb) != CAM_CMD_TIMEOUT)
sym_set_cam_status(ccb, cam_status);
++i;
#if 0
printf("XXXX TASK @%p CLEARED\n", cp);
#endif
}
return i;
}
/*
* chip handler for TASKS recovery
*
* We cannot safely abort a command, while the SCRIPTS
* processor is running, since we just would be in race
* with it.
*
* As long as we have tasks to abort, we keep the SEM
* bit set in the ISTAT. When this bit is set, the
* SCRIPTS processor interrupts (SIR_SCRIPT_STOPPED)
* each time it enters the scheduler.
*
* If we have to reset a target, clear tasks of a unit,
* or to perform the abort of a disconnected job, we
* restart the SCRIPTS for selecting the target. Once
* selected, the SCRIPTS interrupts (SIR_TARGET_SELECTED).
* If it loses arbitration, the SCRIPTS will interrupt again
* the next time it will enter its scheduler, and so on ...
*
* On SIR_TARGET_SELECTED, we scan for the more
* appropriate thing to do:
*
* - If nothing, we just sent a M_ABORT message to the
* target to get rid of the useless SCSI bus ownership.
* According to the specs, no tasks shall be affected.
* - If the target is to be reset, we send it a M_RESET
* message.
* - If a logical UNIT is to be cleared , we send the
* IDENTIFY(lun) + M_ABORT.
* - If an untagged task is to be aborted, we send the
* IDENTIFY(lun) + M_ABORT.
* - If a tagged task is to be aborted, we send the
* IDENTIFY(lun) + task attributes + M_ABORT_TAG.
*
* Once our 'kiss of death' :) message has been accepted
* by the target, the SCRIPTS interrupts again
* (SIR_ABORT_SENT). On this interrupt, we complete
* all the CCBs that should have been aborted by the
* target according to our message.
*/
static void sym_sir_task_recovery(hcb_p np, int num)
{
SYM_QUEHEAD *qp;
ccb_p cp;
tcb_p tp;
int target=-1, lun=-1, task;
int i, k;
switch(num) {
/*
* The SCRIPTS processor stopped before starting
* the next command in order to allow us to perform
* some task recovery.
*/
case SIR_SCRIPT_STOPPED:
/*
* Do we have any target to reset or unit to clear ?
*/
for (i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) {
tp = &np->target[i];
if (tp->to_reset ||
(tp->lun0p && tp->lun0p->to_clear)) {
target = i;
break;
}
if (!tp->lunmp)
continue;
for (k = 1 ; k < SYM_CONF_MAX_LUN ; k++) {
if (tp->lunmp[k] && tp->lunmp[k]->to_clear) {
target = i;
break;
}
}
if (target != -1)
break;
}
/*
* If not, walk the busy queue for any
* disconnected CCB to be aborted.
*/
if (target == -1) {
FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
cp = sym_que_entry(qp,struct sym_ccb,link_ccbq);
if (cp->host_status != HS_DISCONNECT)
continue;
if (cp->to_abort) {
target = cp->target;
break;
}
}
}
/*
* If some target is to be selected,
* prepare and start the selection.
*/
if (target != -1) {
tp = &np->target[target];
np->abrt_sel.sel_id = target;
np->abrt_sel.sel_scntl3 = tp->head.wval;
np->abrt_sel.sel_sxfer = tp->head.sval;
OUTL(nc_dsa, np->hcb_ba);
OUTL_DSP (SCRIPTB_BA (np, sel_for_abort));
return;
}
/*
* Now look for a CCB to abort that haven't started yet.
* Btw, the SCRIPTS processor is still stopped, so
* we are not in race.
*/
i = 0;
cp = NULL;
FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
if (cp->host_status != HS_BUSY &&
cp->host_status != HS_NEGOTIATE)
continue;
if (!cp->to_abort)
continue;
#ifdef SYM_CONF_IARB_SUPPORT
/*
* If we are using IMMEDIATE ARBITRATION, we donnot
* want to cancel the last queued CCB, since the
* SCRIPTS may have anticipated the selection.
*/
if (cp == np->last_cp) {
cp->to_abort = 0;
continue;
}
#endif
i = 1; /* Means we have found some */
break;
}
if (!i) {
/*
* We are done, so we donnot need
* to synchronize with the SCRIPTS anylonger.
* Remove the SEM flag from the ISTAT.
*/
np->istat_sem = 0;
OUTB (nc_istat, SIGP);
break;
}
/*
* Compute index of next position in the start
* queue the SCRIPTS intends to start and dequeue
* all CCBs for that device that haven't been started.
*/
i = (INL (nc_scratcha) - np->squeue_ba) / 4;
i = sym_dequeue_from_squeue(np, i, cp->target, cp->lun, -1);
/*
* Make sure at least our IO to abort has been dequeued.
*/
assert(i && sym_get_cam_status(cp->cam_ccb) == CAM_REQUEUE_REQ);
/*
* Keep track in cam status of the reason of the abort.
*/
if (cp->to_abort == 2)
sym_set_cam_status(cp->cam_ccb, CAM_CMD_TIMEOUT);
else
sym_set_cam_status(cp->cam_ccb, CAM_REQ_ABORTED);
/*
* Complete with error everything that we have dequeued.
*/
sym_flush_comp_queue(np, 0);
break;
/*
* The SCRIPTS processor has selected a target
* we may have some manual recovery to perform for.
*/
case SIR_TARGET_SELECTED:
target = (INB (nc_sdid) & 0xf);
tp = &np->target[target];
np->abrt_tbl.addr = cpu_to_scr(vtobus(np->abrt_msg));
/*
* If the target is to be reset, prepare a
* M_RESET message and clear the to_reset flag
* since we donnot expect this operation to fail.
*/
if (tp->to_reset) {
np->abrt_msg[0] = M_RESET;
np->abrt_tbl.size = 1;
tp->to_reset = 0;
break;
}
/*
* Otherwise, look for some logical unit to be cleared.
*/
if (tp->lun0p && tp->lun0p->to_clear)
lun = 0;
else if (tp->lunmp) {
for (k = 1 ; k < SYM_CONF_MAX_LUN ; k++) {
if (tp->lunmp[k] && tp->lunmp[k]->to_clear) {
lun = k;
break;
}
}
}
/*
* If a logical unit is to be cleared, prepare
* an IDENTIFY(lun) + ABORT MESSAGE.
*/
if (lun != -1) {
lcb_p lp = sym_lp(tp, lun);
lp->to_clear = 0; /* We donnot expect to fail here */
np->abrt_msg[0] = M_IDENTIFY | lun;
np->abrt_msg[1] = M_ABORT;
np->abrt_tbl.size = 2;
break;
}
/*
* Otherwise, look for some disconnected job to
* abort for this target.
*/
i = 0;
cp = NULL;
FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
if (cp->host_status != HS_DISCONNECT)
continue;
if (cp->target != target)
continue;
if (!cp->to_abort)
continue;
i = 1; /* Means we have some */
break;
}
/*
* If we have none, probably since the device has
* completed the command before we won abitration,
* send a M_ABORT message without IDENTIFY.
* According to the specs, the device must just
* disconnect the BUS and not abort any task.
*/
if (!i) {
np->abrt_msg[0] = M_ABORT;
np->abrt_tbl.size = 1;
break;
}
/*
* We have some task to abort.
* Set the IDENTIFY(lun)
*/
np->abrt_msg[0] = M_IDENTIFY | cp->lun;
/*
* If we want to abort an untagged command, we
* will send an IDENTIFY + M_ABORT.
* Otherwise (tagged command), we will send
* an IDENTIFY + task attributes + ABORT TAG.
*/
if (cp->tag == NO_TAG) {
np->abrt_msg[1] = M_ABORT;
np->abrt_tbl.size = 2;
}
else {
np->abrt_msg[1] = cp->scsi_smsg[1];
np->abrt_msg[2] = cp->scsi_smsg[2];
np->abrt_msg[3] = M_ABORT_TAG;
np->abrt_tbl.size = 4;
}
/*
* Keep track of software timeout condition, since the
* peripheral driver may not count retries on abort
* conditions not due to timeout.
*/
if (cp->to_abort == 2)
sym_set_cam_status(cp->cam_ccb, CAM_CMD_TIMEOUT);
cp->to_abort = 0; /* We donnot expect to fail here */
break;
/*
* The target has accepted our message and switched
* to BUS FREE phase as we expected.
*/
case SIR_ABORT_SENT:
target = (INB (nc_sdid) & 0xf);
tp = &np->target[target];
/*
** If we didn't abort anything, leave here.
*/
if (np->abrt_msg[0] == M_ABORT)
break;
/*
* If we sent a M_RESET, then a hardware reset has
* been performed by the target.
* - Reset everything to async 8 bit
* - Tell ourself to negotiate next time :-)
* - Prepare to clear all disconnected CCBs for
* this target from our task list (lun=task=-1)
*/
lun = -1;
task = -1;
if (np->abrt_msg[0] == M_RESET) {
tp->head.sval = 0;
tp->head.wval = np->rv_scntl3;
tp->head.uval = 0;
tp->tinfo.current.period = 0;
tp->tinfo.current.offset = 0;
tp->tinfo.current.width = BUS_8_BIT;
tp->tinfo.current.options = 0;
}
/*
* Otherwise, check for the LUN and TASK(s)
* concerned by the cancellation.
* If it is not ABORT_TAG then it is CLEAR_QUEUE
* or an ABORT message :-)
*/
else {
lun = np->abrt_msg[0] & 0x3f;
if (np->abrt_msg[1] == M_ABORT_TAG)
task = np->abrt_msg[2];
}
/*
* Complete all the CCBs the device should have
* aborted due to our 'kiss of death' message.
*/
i = (INL (nc_scratcha) - np->squeue_ba) / 4;
(void) sym_dequeue_from_squeue(np, i, target, lun, -1);
(void) sym_clear_tasks(np, CAM_REQ_ABORTED, target, lun, task);
sym_flush_comp_queue(np, 0);
/*
* If we sent a BDR, make uper layer aware of that.
*/
if (np->abrt_msg[0] == M_RESET)
xpt_async(AC_SENT_BDR, np->path, NULL);
break;
}
/*
* Print to the log the message we intend to send.
*/
if (num == SIR_TARGET_SELECTED) {
PRINT_TARGET(np, target);
sym_printl_hex("control msgout:", np->abrt_msg,
np->abrt_tbl.size);
np->abrt_tbl.size = cpu_to_scr(np->abrt_tbl.size);
}
/*
* Let the SCRIPTS processor continue.
*/
OUTONB_STD ();
}
/*
* Gerard's alchemy:) that deals with with the data
* pointer for both MDP and the residual calculation.
*
* I didn't want to bloat the code by more than 200
* lignes for the handling of both MDP and the residual.
* This has been achieved by using a data pointer
* representation consisting in an index in the data
* array (dp_sg) and a negative offset (dp_ofs) that
* have the following meaning:
*
* - dp_sg = SYM_CONF_MAX_SG
* we are at the end of the data script.
* - dp_sg < SYM_CONF_MAX_SG
* dp_sg points to the next entry of the scatter array
* we want to transfer.
* - dp_ofs < 0
* dp_ofs represents the residual of bytes of the
* previous entry scatter entry we will send first.
* - dp_ofs = 0
* no residual to send first.
*
* The function sym_evaluate_dp() accepts an arbitray
* offset (basically from the MDP message) and returns
* the corresponding values of dp_sg and dp_ofs.
*/
static int sym_evaluate_dp(hcb_p np, ccb_p cp, u32 scr, int *ofs)
{
u32 dp_scr;
int dp_ofs, dp_sg, dp_sgmin;
int tmp;
struct sym_pmc *pm;
/*
* Compute the resulted data pointer in term of a script
* address within some DATA script and a signed byte offset.
*/
dp_scr = scr;
dp_ofs = *ofs;
if (dp_scr == SCRIPTA_BA (np, pm0_data))
pm = &cp->phys.pm0;
else if (dp_scr == SCRIPTA_BA (np, pm1_data))
pm = &cp->phys.pm1;
else
pm = NULL;
if (pm) {
dp_scr = scr_to_cpu(pm->ret);
dp_ofs -= scr_to_cpu(pm->sg.size);
}
/*
* If we are auto-sensing, then we are done.
*/
if (cp->host_flags & HF_SENSE) {
*ofs = dp_ofs;
return 0;
}
/*
* Deduce the index of the sg entry.
* Keep track of the index of the first valid entry.
* If result is dp_sg = SYM_CONF_MAX_SG, then we are at the
* end of the data.
*/
tmp = scr_to_cpu(cp->phys.head.goalp);
dp_sg = SYM_CONF_MAX_SG;
if (dp_scr != tmp)
dp_sg -= (tmp - 8 - (int)dp_scr) / (2*4);
dp_sgmin = SYM_CONF_MAX_SG - cp->segments;
/*
* Move to the sg entry the data pointer belongs to.
*
* If we are inside the data area, we expect result to be:
*
* Either,
* dp_ofs = 0 and dp_sg is the index of the sg entry
* the data pointer belongs to (or the end of the data)
* Or,
* dp_ofs < 0 and dp_sg is the index of the sg entry
* the data pointer belongs to + 1.
*/
if (dp_ofs < 0) {
int n;
while (dp_sg > dp_sgmin) {
--dp_sg;
tmp = scr_to_cpu(cp->phys.data[dp_sg].size);
n = dp_ofs + (tmp & 0xffffff);
if (n > 0) {
++dp_sg;
break;
}
dp_ofs = n;
}
}
else if (dp_ofs > 0) {
while (dp_sg < SYM_CONF_MAX_SG) {
tmp = scr_to_cpu(cp->phys.data[dp_sg].size);
dp_ofs -= (tmp & 0xffffff);
++dp_sg;
if (dp_ofs <= 0)
break;
}
}
/*
* Make sure the data pointer is inside the data area.
* If not, return some error.
*/
if (dp_sg < dp_sgmin || (dp_sg == dp_sgmin && dp_ofs < 0))
goto out_err;
else if (dp_sg > SYM_CONF_MAX_SG ||
(dp_sg == SYM_CONF_MAX_SG && dp_ofs > 0))
goto out_err;
/*
* Save the extreme pointer if needed.
*/
if (dp_sg > cp->ext_sg ||
(dp_sg == cp->ext_sg && dp_ofs > cp->ext_ofs)) {
cp->ext_sg = dp_sg;
cp->ext_ofs = dp_ofs;
}
/*
* Return data.
*/
*ofs = dp_ofs;
return dp_sg;
out_err:
return -1;
}
/*
* chip handler for MODIFY DATA POINTER MESSAGE
*
* We also call this function on IGNORE WIDE RESIDUE
* messages that do not match a SWIDE full condition.
* Btw, we assume in that situation that such a message
* is equivalent to a MODIFY DATA POINTER (offset=-1).
*/
static void sym_modify_dp(hcb_p np, ccb_p cp, int ofs)
{
int dp_ofs = ofs;
u32 dp_scr = INL (nc_temp);
u32 dp_ret;
u32 tmp;
u_char hflags;
int dp_sg;
struct sym_pmc *pm;
/*
* Not supported for auto-sense.
*/
if (cp->host_flags & HF_SENSE)
goto out_reject;
/*
* Apply our alchemy:) (see comments in sym_evaluate_dp()),
* to the resulted data pointer.
*/
dp_sg = sym_evaluate_dp(np, cp, dp_scr, &dp_ofs);
if (dp_sg < 0)
goto out_reject;
/*
* And our alchemy:) allows to easily calculate the data
* script address we want to return for the next data phase.
*/
dp_ret = cpu_to_scr(cp->phys.head.goalp);
dp_ret = dp_ret - 8 - (SYM_CONF_MAX_SG - dp_sg) * (2*4);
/*
* If offset / scatter entry is zero we donnot need
* a context for the new current data pointer.
*/
if (dp_ofs == 0) {
dp_scr = dp_ret;
goto out_ok;
}
/*
* Get a context for the new current data pointer.
*/
hflags = INB (HF_PRT);
if (hflags & HF_DP_SAVED)
hflags ^= HF_ACT_PM;
if (!(hflags & HF_ACT_PM)) {
pm = &cp->phys.pm0;
dp_scr = SCRIPTA_BA (np, pm0_data);
}
else {
pm = &cp->phys.pm1;
dp_scr = SCRIPTA_BA (np, pm1_data);
}
hflags &= ~(HF_DP_SAVED);
OUTB (HF_PRT, hflags);
/*
* Set up the new current data pointer.
* ofs < 0 there, and for the next data phase, we
* want to transfer part of the data of the sg entry
* corresponding to index dp_sg-1 prior to returning
* to the main data script.
*/
pm->ret = cpu_to_scr(dp_ret);
tmp = scr_to_cpu(cp->phys.data[dp_sg-1].addr);
tmp += scr_to_cpu(cp->phys.data[dp_sg-1].size) + dp_ofs;
pm->sg.addr = cpu_to_scr(tmp);
pm->sg.size = cpu_to_scr(-dp_ofs);
out_ok:
OUTL (nc_temp, dp_scr);
OUTL_DSP (SCRIPTA_BA (np, clrack));
return;
out_reject:
OUTL_DSP (SCRIPTB_BA (np, msg_bad));
}
/*
* chip calculation of the data residual.
*
* As I used to say, the requirement of data residual
* in SCSI is broken, useless and cannot be achieved
* without huge complexity.
* But most OSes and even the official CAM require it.
* When stupidity happens to be so widely spread inside
* a community, it gets hard to convince.
*
* Anyway, I don't care, since I am not going to use
* any software that considers this data residual as
* a relevant information. :)
*/
static int sym_compute_residual(hcb_p np, ccb_p cp)
{
int dp_sg, resid = 0;
int dp_ofs = 0;
/*
* Check for some data lost or just thrown away.
* We are not required to be quite accurate in this
* situation. Btw, if we are odd for output and the
* device claims some more data, it may well happen
* than our residual be zero. :-)
*/
if (cp->xerr_status & (XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN)) {
if (cp->xerr_status & XE_EXTRA_DATA)
resid -= cp->extra_bytes;
if (cp->xerr_status & XE_SODL_UNRUN)
++resid;
if (cp->xerr_status & XE_SWIDE_OVRUN)
--resid;
}
/*
* If all data has been transferred,
* there is no residual.
*/
if (cp->phys.head.lastp == cp->phys.head.goalp)
return resid;
/*
* If no data transfer occurs, or if the data
* pointer is weird, return full residual.
*/
if (cp->startp == cp->phys.head.lastp ||
sym_evaluate_dp(np, cp, scr_to_cpu(cp->phys.head.lastp),
&dp_ofs) < 0) {
return cp->data_len;
}
/*
* If we were auto-sensing, then we are done.
*/
if (cp->host_flags & HF_SENSE) {
return -dp_ofs;
}
/*
* We are now full comfortable in the computation
* of the data residual (2's complement).
*/
resid = -cp->ext_ofs;
for (dp_sg = cp->ext_sg; dp_sg < SYM_CONF_MAX_SG; ++dp_sg) {
u_int tmp = scr_to_cpu(cp->phys.data[dp_sg].size);
resid += (tmp & 0xffffff);
}
/*
* Hopefully, the result is not too wrong.
*/
return resid;
}
/*
* Print out the content of a SCSI message.
*/
static int sym_show_msg (u_char * msg)
{
u_char i;
printf ("%x",*msg);
if (*msg==M_EXTENDED) {
for (i=1;i<8;i++) {
if (i-1>msg[1]) break;
printf ("-%x",msg[i]);
}
return (i+1);
} else if ((*msg & 0xf0) == 0x20) {
printf ("-%x",msg[1]);
return (2);
}
return (1);
}
static void sym_print_msg (ccb_p cp, char *label, u_char *msg)
{
PRINT_ADDR(cp);
if (label)
printf ("%s: ", label);
(void) sym_show_msg (msg);
printf (".\n");
}
/*
* Negotiation for WIDE and SYNCHRONOUS DATA TRANSFER.
*
* When we try to negotiate, we append the negotiation message
* to the identify and (maybe) simple tag message.
* The host status field is set to HS_NEGOTIATE to mark this
* situation.
*
* If the target doesn't answer this message immediately
* (as required by the standard), the SIR_NEGO_FAILED interrupt
* will be raised eventually.
* The handler removes the HS_NEGOTIATE status, and sets the
* negotiated value to the default (async / nowide).
*
* If we receive a matching answer immediately, we check it
* for validity, and set the values.
*
* If we receive a Reject message immediately, we assume the
* negotiation has failed, and fall back to standard values.
*
* If we receive a negotiation message while not in HS_NEGOTIATE
* state, it's a target initiated negotiation. We prepare a
* (hopefully) valid answer, set our parameters, and send back
* this answer to the target.
*
* If the target doesn't fetch the answer (no message out phase),
* we assume the negotiation has failed, and fall back to default
* settings (SIR_NEGO_PROTO interrupt).
*
* When we set the values, we adjust them in all ccbs belonging
* to this target, in the controller's register, and in the "phys"
* field of the controller's struct sym_hcb.
*/
/*
* chip handler for SYNCHRONOUS DATA TRANSFER REQUEST (SDTR) message.
*/
static void sym_sync_nego(hcb_p np, tcb_p tp, ccb_p cp)
{
u_char chg, ofs, per, fak, div;
int req = 1;
/*
* Synchronous request message received.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
sym_print_msg(cp, "sync msgin", np->msgin);
}
/*
* request or answer ?
*/
if (INB (HS_PRT) == HS_NEGOTIATE) {
OUTB (HS_PRT, HS_BUSY);
if (cp->nego_status && cp->nego_status != NS_SYNC)
goto reject_it;
req = 0;
}
/*
* get requested values.
*/
chg = 0;
per = np->msgin[3];
ofs = np->msgin[4];
/*
* check values against our limits.
*/
if (ofs) {
if (ofs > np->maxoffs)
{chg = 1; ofs = np->maxoffs;}
if (req) {
if (ofs > tp->tinfo.user.offset)
{chg = 1; ofs = tp->tinfo.user.offset;}
}
}
if (ofs) {
if (per < np->minsync)
{chg = 1; per = np->minsync;}
if (req) {
if (per < tp->tinfo.user.period)
{chg = 1; per = tp->tinfo.user.period;}
}
}
div = fak = 0;
if (ofs && sym_getsync(np, 0, per, &div, &fak) < 0)
goto reject_it;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp);
printf ("sdtr: ofs=%d per=%d div=%d fak=%d chg=%d.\n",
ofs, per, div, fak, chg);
}
/*
* This was an answer message
*/
if (req == 0) {
if (chg) /* Answer wasn't acceptable. */
goto reject_it;
sym_setsync (np, cp, ofs, per, div, fak);
OUTL_DSP (SCRIPTA_BA (np, clrack));
return;
}
/*
* It was a request. Set value and
* prepare an answer message
*/
sym_setsync (np, cp, ofs, per, div, fak);
np->msgout[0] = M_EXTENDED;
np->msgout[1] = 3;
np->msgout[2] = M_X_SYNC_REQ;
np->msgout[3] = per;
np->msgout[4] = ofs;
cp->nego_status = NS_SYNC;
if (DEBUG_FLAGS & DEBUG_NEGO) {
sym_print_msg(cp, "sync msgout", np->msgout);
}
np->msgin [0] = M_NOOP;
OUTL_DSP (SCRIPTB_BA (np, sdtr_resp));
return;
reject_it:
sym_setsync (np, cp, 0, 0, 0, 0);
OUTL_DSP (SCRIPTB_BA (np, msg_bad));
}
/*
* chip handler for PARALLEL PROTOCOL REQUEST (PPR) message.
*/
static void sym_ppr_nego(hcb_p np, tcb_p tp, ccb_p cp)
{
u_char chg, ofs, per, fak, dt, div, wide;
int req = 1;
/*
* Synchronous request message received.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
sym_print_msg(cp, "ppr msgin", np->msgin);
}
/*
* get requested values.
*/
chg = 0;
per = np->msgin[3];
ofs = np->msgin[5];
wide = np->msgin[6];
dt = np->msgin[7] & PPR_OPT_DT;
/*
* request or answer ?
*/
if (INB (HS_PRT) == HS_NEGOTIATE) {
OUTB (HS_PRT, HS_BUSY);
if (cp->nego_status && cp->nego_status != NS_PPR)
goto reject_it;
req = 0;
}
/*
* check values against our limits.
*/
if (wide > np->maxwide)
{chg = 1; wide = np->maxwide;}
if (!wide || !(np->features & FE_ULTRA3))
dt &= ~PPR_OPT_DT;
if (req) {
if (wide > tp->tinfo.user.width)
{chg = 1; wide = tp->tinfo.user.width;}
}
if (!(np->features & FE_U3EN)) /* Broken U3EN bit not supported */
dt &= ~PPR_OPT_DT;
if (dt != (np->msgin[7] & PPR_OPT_MASK)) chg = 1;
if (ofs) {
if (dt) {
if (ofs > np->maxoffs_dt)
{chg = 1; ofs = np->maxoffs_dt;}
}
else if (ofs > np->maxoffs)
{chg = 1; ofs = np->maxoffs;}
if (req) {
if (ofs > tp->tinfo.user.offset)
{chg = 1; ofs = tp->tinfo.user.offset;}
}
}
if (ofs) {
if (dt) {
if (per < np->minsync_dt)
{chg = 1; per = np->minsync_dt;}
}
else if (per < np->minsync)
{chg = 1; per = np->minsync;}
if (req) {
if (per < tp->tinfo.user.period)
{chg = 1; per = tp->tinfo.user.period;}
}
}
div = fak = 0;
if (ofs && sym_getsync(np, dt, per, &div, &fak) < 0)
goto reject_it;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp);
printf ("ppr: "
"dt=%x ofs=%d per=%d wide=%d div=%d fak=%d chg=%d.\n",
dt, ofs, per, wide, div, fak, chg);
}
/*
* It was an answer.
*/
if (req == 0) {
if (chg) /* Answer wasn't acceptable */
goto reject_it;
sym_setpprot (np, cp, dt, ofs, per, wide, div, fak);
OUTL_DSP (SCRIPTA_BA (np, clrack));
return;
}
/*
* It was a request. Set value and
* prepare an answer message
*/
sym_setpprot (np, cp, dt, ofs, per, wide, div, fak);
np->msgout[0] = M_EXTENDED;
np->msgout[1] = 6;
np->msgout[2] = M_X_PPR_REQ;
np->msgout[3] = per;
np->msgout[4] = 0;
np->msgout[5] = ofs;
np->msgout[6] = wide;
np->msgout[7] = dt;
cp->nego_status = NS_PPR;
if (DEBUG_FLAGS & DEBUG_NEGO) {
sym_print_msg(cp, "ppr msgout", np->msgout);
}
np->msgin [0] = M_NOOP;
OUTL_DSP (SCRIPTB_BA (np, ppr_resp));
return;
reject_it:
sym_setpprot (np, cp, 0, 0, 0, 0, 0, 0);
OUTL_DSP (SCRIPTB_BA (np, msg_bad));
/*
* If it was a device response that should result in
* ST, we may want to try a legacy negotiation later.
*/
if (!req && !dt) {
tp->tinfo.goal.options = 0;
tp->tinfo.goal.width = wide;
tp->tinfo.goal.period = per;
tp->tinfo.goal.offset = ofs;
}
}
/*
* chip handler for WIDE DATA TRANSFER REQUEST (WDTR) message.
*/
static void sym_wide_nego(hcb_p np, tcb_p tp, ccb_p cp)
{
u_char chg, wide;
int req = 1;
/*
* Wide request message received.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
sym_print_msg(cp, "wide msgin", np->msgin);
}
/*
* Is it a request from the device?
*/
if (INB (HS_PRT) == HS_NEGOTIATE) {
OUTB (HS_PRT, HS_BUSY);
if (cp->nego_status && cp->nego_status != NS_WIDE)
goto reject_it;
req = 0;
}
/*
* get requested values.
*/
chg = 0;
wide = np->msgin[3];
/*
* check values against driver limits.
*/
if (wide > np->maxwide)
{chg = 1; wide = np->maxwide;}
if (req) {
if (wide > tp->tinfo.user.width)
{chg = 1; wide = tp->tinfo.user.width;}
}
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp);
printf ("wdtr: wide=%d chg=%d.\n", wide, chg);
}
/*
* This was an answer message
*/
if (req == 0) {
if (chg) /* Answer wasn't acceptable. */
goto reject_it;
sym_setwide (np, cp, wide);
/*
* Negotiate for SYNC immediately after WIDE response.
* This allows to negotiate for both WIDE and SYNC on
* a single SCSI command (Suggested by Justin Gibbs).
*/
if (tp->tinfo.goal.offset) {
np->msgout[0] = M_EXTENDED;
np->msgout[1] = 3;
np->msgout[2] = M_X_SYNC_REQ;
np->msgout[3] = tp->tinfo.goal.period;
np->msgout[4] = tp->tinfo.goal.offset;
if (DEBUG_FLAGS & DEBUG_NEGO) {
sym_print_msg(cp, "sync msgout", np->msgout);
}
cp->nego_status = NS_SYNC;
OUTB (HS_PRT, HS_NEGOTIATE);
OUTL_DSP (SCRIPTB_BA (np, sdtr_resp));
return;
}
OUTL_DSP (SCRIPTA_BA (np, clrack));
return;
}
/*
* It was a request, set value and
* prepare an answer message
*/
sym_setwide (np, cp, wide);
np->msgout[0] = M_EXTENDED;
np->msgout[1] = 2;
np->msgout[2] = M_X_WIDE_REQ;
np->msgout[3] = wide;
np->msgin [0] = M_NOOP;
cp->nego_status = NS_WIDE;
if (DEBUG_FLAGS & DEBUG_NEGO) {
sym_print_msg(cp, "wide msgout", np->msgout);
}
OUTL_DSP (SCRIPTB_BA (np, wdtr_resp));
return;
reject_it:
OUTL_DSP (SCRIPTB_BA (np, msg_bad));
}
/*
* Reset SYNC or WIDE to default settings.
*
* Called when a negotiation does not succeed either
* on rejection or on protocol error.
*
* If it was a PPR that made problems, we may want to
* try a legacy negotiation later.
*/
static void sym_nego_default(hcb_p np, tcb_p tp, ccb_p cp)
{
/*
* any error in negotiation:
* fall back to default mode.
*/
switch (cp->nego_status) {
case NS_PPR:
#if 0
sym_setpprot (np, cp, 0, 0, 0, 0, 0, 0);
#else
tp->tinfo.goal.options = 0;
if (tp->tinfo.goal.period < np->minsync)
tp->tinfo.goal.period = np->minsync;
if (tp->tinfo.goal.offset > np->maxoffs)
tp->tinfo.goal.offset = np->maxoffs;
#endif
break;
case NS_SYNC:
sym_setsync (np, cp, 0, 0, 0, 0);
break;
case NS_WIDE:
sym_setwide (np, cp, 0);
break;
}
np->msgin [0] = M_NOOP;
np->msgout[0] = M_NOOP;
cp->nego_status = 0;
}
/*
* chip handler for MESSAGE REJECT received in response to
* a WIDE or SYNCHRONOUS negotiation.
*/
static void sym_nego_rejected(hcb_p np, tcb_p tp, ccb_p cp)
{
sym_nego_default(np, tp, cp);
OUTB (HS_PRT, HS_BUSY);
}
/*
* chip exception handler for programmed interrupts.
*/
static void sym_int_sir (hcb_p np)
{
u_char num = INB (nc_dsps);
u32 dsa = INL (nc_dsa);
ccb_p cp = sym_ccb_from_dsa(np, dsa);
u_char target = INB (nc_sdid) & 0x0f;
tcb_p tp = &np->target[target];
int tmp;
SYM_LOCK_ASSERT(MA_OWNED);
if (DEBUG_FLAGS & DEBUG_TINY) printf ("I#%d", num);
switch (num) {
/*
* Command has been completed with error condition
* or has been auto-sensed.
*/
case SIR_COMPLETE_ERROR:
if (!cp)
goto out;
sym_complete_error(np, cp);
return;
/*
* The C code is currently trying to recover from something.
* Typically, user want to abort some command.
*/
case SIR_SCRIPT_STOPPED:
case SIR_TARGET_SELECTED:
case SIR_ABORT_SENT:
sym_sir_task_recovery(np, num);
return;
/*
* The device didn't go to MSG OUT phase after having
* been selected with ATN. We donnot want to handle
* that.
*/
case SIR_SEL_ATN_NO_MSG_OUT:
printf ("%s:%d: No MSG OUT phase after selection with ATN.\n",
sym_name (np), target);
goto out_stuck;
/*
* The device didn't switch to MSG IN phase after
* having reseleted the initiator.
*/
case SIR_RESEL_NO_MSG_IN:
printf ("%s:%d: No MSG IN phase after reselection.\n",
sym_name (np), target);
goto out_stuck;
/*
* After reselection, the device sent a message that wasn't
* an IDENTIFY.
*/
case SIR_RESEL_NO_IDENTIFY:
printf ("%s:%d: No IDENTIFY after reselection.\n",
sym_name (np), target);
goto out_stuck;
/*
* The device reselected a LUN we donnot know about.
*/
case SIR_RESEL_BAD_LUN:
np->msgout[0] = M_RESET;
goto out;
/*
* The device reselected for an untagged nexus and we
* haven't any.
*/
case SIR_RESEL_BAD_I_T_L:
np->msgout[0] = M_ABORT;
goto out;
/*
* The device reselected for a tagged nexus that we donnot
* have.
*/
case SIR_RESEL_BAD_I_T_L_Q:
np->msgout[0] = M_ABORT_TAG;
goto out;
/*
* The SCRIPTS let us know that the device has grabbed
* our message and will abort the job.
*/
case SIR_RESEL_ABORTED:
np->lastmsg = np->msgout[0];
np->msgout[0] = M_NOOP;
printf ("%s:%d: message %x sent on bad reselection.\n",
sym_name (np), target, np->lastmsg);
goto out;
/*
* The SCRIPTS let us know that a message has been
* successfully sent to the device.
*/
case SIR_MSG_OUT_DONE:
np->lastmsg = np->msgout[0];
np->msgout[0] = M_NOOP;
/* Should we really care of that */
if (np->lastmsg == M_PARITY || np->lastmsg == M_ID_ERROR) {
if (cp) {
cp->xerr_status &= ~XE_PARITY_ERR;
if (!cp->xerr_status)
OUTOFFB (HF_PRT, HF_EXT_ERR);
}
}
goto out;
/*
* The device didn't send a GOOD SCSI status.
* We may have some work to do prior to allow
* the SCRIPTS processor to continue.
*/
case SIR_BAD_SCSI_STATUS:
if (!cp)
goto out;
sym_sir_bad_scsi_status(np, cp);
return;
/*
* We are asked by the SCRIPTS to prepare a
* REJECT message.
*/
case SIR_REJECT_TO_SEND:
sym_print_msg(cp, "M_REJECT to send for ", np->msgin);
np->msgout[0] = M_REJECT;
goto out;
/*
* We have been ODD at the end of a DATA IN
* transfer and the device didn't send a
* IGNORE WIDE RESIDUE message.
* It is a data overrun condition.
*/
case SIR_SWIDE_OVERRUN:
if (cp) {
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_SWIDE_OVRUN;
}
goto out;
/*
* We have been ODD at the end of a DATA OUT
* transfer.
* It is a data underrun condition.
*/
case SIR_SODL_UNDERRUN:
if (cp) {
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_SODL_UNRUN;
}
goto out;
/*
* The device wants us to transfer more data than
* expected or in the wrong direction.
* The number of extra bytes is in scratcha.
* It is a data overrun condition.
*/
case SIR_DATA_OVERRUN:
if (cp) {
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_EXTRA_DATA;
cp->extra_bytes += INL (nc_scratcha);
}
goto out;
/*
* The device switched to an illegal phase (4/5).
*/
case SIR_BAD_PHASE:
if (cp) {
OUTONB (HF_PRT, HF_EXT_ERR);
cp->xerr_status |= XE_BAD_PHASE;
}
goto out;
/*
* We received a message.
*/
case SIR_MSG_RECEIVED:
if (!cp)
goto out_stuck;
switch (np->msgin [0]) {
/*
* We received an extended message.
* We handle MODIFY DATA POINTER, SDTR, WDTR
* and reject all other extended messages.
*/
case M_EXTENDED:
switch (np->msgin [2]) {
case M_X_MODIFY_DP:
if (DEBUG_FLAGS & DEBUG_POINTER)
sym_print_msg(cp,"modify DP",np->msgin);
tmp = (np->msgin[3]<<24) + (np->msgin[4]<<16) +
(np->msgin[5]<<8) + (np->msgin[6]);
sym_modify_dp(np, cp, tmp);
return;
case M_X_SYNC_REQ:
sym_sync_nego(np, tp, cp);
return;
case M_X_PPR_REQ:
sym_ppr_nego(np, tp, cp);
return;
case M_X_WIDE_REQ:
sym_wide_nego(np, tp, cp);
return;
default:
goto out_reject;
}
break;
/*
* We received a 1/2 byte message not handled from SCRIPTS.
* We are only expecting MESSAGE REJECT and IGNORE WIDE
* RESIDUE messages that haven't been anticipated by
* SCRIPTS on SWIDE full condition. Unanticipated IGNORE
* WIDE RESIDUE messages are aliased as MODIFY DP (-1).
*/
case M_IGN_RESIDUE:
if (DEBUG_FLAGS & DEBUG_POINTER)
sym_print_msg(cp,"ign wide residue", np->msgin);
sym_modify_dp(np, cp, -1);
return;
case M_REJECT:
if (INB (HS_PRT) == HS_NEGOTIATE)
sym_nego_rejected(np, tp, cp);
else {
PRINT_ADDR(cp);
printf ("M_REJECT received (%x:%x).\n",
scr_to_cpu(np->lastmsg), np->msgout[0]);
}
goto out_clrack;
break;
default:
goto out_reject;
}
break;
/*
* We received an unknown message.
* Ignore all MSG IN phases and reject it.
*/
case SIR_MSG_WEIRD:
sym_print_msg(cp, "WEIRD message received", np->msgin);
OUTL_DSP (SCRIPTB_BA (np, msg_weird));
return;
/*
* Negotiation failed.
* Target does not send us the reply.
* Remove the HS_NEGOTIATE status.
*/
case SIR_NEGO_FAILED:
OUTB (HS_PRT, HS_BUSY);
/*
* Negotiation failed.
* Target does not want answer message.
*/
case SIR_NEGO_PROTO:
if (!cp)
goto out;
sym_nego_default(np, tp, cp);
goto out;
}
out:
OUTONB_STD ();
return;
out_reject:
OUTL_DSP (SCRIPTB_BA (np, msg_bad));
return;
out_clrack:
OUTL_DSP (SCRIPTA_BA (np, clrack));
return;
out_stuck:
return;
}
/*
* Acquire a control block
*/
static ccb_p sym_get_ccb (hcb_p np, u_char tn, u_char ln, u_char tag_order)
{
tcb_p tp = &np->target[tn];
lcb_p lp = sym_lp(tp, ln);
u_short tag = NO_TAG;
SYM_QUEHEAD *qp;
ccb_p cp = (ccb_p) NULL;
/*
* Look for a free CCB
*/
if (sym_que_empty(&np->free_ccbq))
goto out;
qp = sym_remque_head(&np->free_ccbq);
if (!qp)
goto out;
cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
/*
* If the LCB is not yet available and the LUN
* has been probed ok, try to allocate the LCB.
*/
if (!lp && sym_is_bit(tp->lun_map, ln)) {
lp = sym_alloc_lcb(np, tn, ln);
if (!lp)
goto out_free;
}
/*
* If the LCB is not available here, then the
* logical unit is not yet discovered. For those
* ones only accept 1 SCSI IO per logical unit,
* since we cannot allow disconnections.
*/
if (!lp) {
if (!sym_is_bit(tp->busy0_map, ln))
sym_set_bit(tp->busy0_map, ln);
else
goto out_free;
} else {
/*
* If we have been asked for a tagged command, refuse
* to overlap with an existing untagged one.
*/
if (tag_order) {
if (lp->busy_itl != 0)
goto out_free;
/*
* Allocate resources for tags if not yet.
*/
if (!lp->cb_tags) {
sym_alloc_lcb_tags(np, tn, ln);
if (!lp->cb_tags)
goto out_free;
}
/*
* Get a tag for this SCSI IO and set up
* the CCB bus address for reselection,
* and count it for this LUN.
* Toggle reselect path to tagged.
*/
if (lp->busy_itlq < SYM_CONF_MAX_TASK) {
tag = lp->cb_tags[lp->ia_tag];
if (++lp->ia_tag == SYM_CONF_MAX_TASK)
lp->ia_tag = 0;
lp->itlq_tbl[tag] = cpu_to_scr(cp->ccb_ba);
++lp->busy_itlq;
lp->head.resel_sa =
cpu_to_scr(SCRIPTA_BA (np, resel_tag));
}
else
goto out_free;
}
/*
* This command will not be tagged.
* If we already have either a tagged or untagged
* one, refuse to overlap this untagged one.
*/
else {
if (lp->busy_itlq != 0 || lp->busy_itl != 0)
goto out_free;
/*
* Count this nexus for this LUN.
* Set up the CCB bus address for reselection.
* Toggle reselect path to untagged.
*/
lp->busy_itl = 1;
lp->head.itl_task_sa = cpu_to_scr(cp->ccb_ba);
lp->head.resel_sa =
cpu_to_scr(SCRIPTA_BA (np, resel_no_tag));
}
}
/*
* Put the CCB into the busy queue.
*/
sym_insque_tail(&cp->link_ccbq, &np->busy_ccbq);
/*
* Remember all informations needed to free this CCB.
*/
cp->to_abort = 0;
cp->tag = tag;
cp->target = tn;
cp->lun = ln;
if (DEBUG_FLAGS & DEBUG_TAGS) {
PRINT_LUN(np, tn, ln);
printf ("ccb @%p using tag %d.\n", cp, tag);
}
out:
return cp;
out_free:
sym_insque_head(&cp->link_ccbq, &np->free_ccbq);
return NULL;
}
/*
* Release one control block
*/
static void sym_free_ccb(hcb_p np, ccb_p cp)
{
tcb_p tp = &np->target[cp->target];
lcb_p lp = sym_lp(tp, cp->lun);
if (DEBUG_FLAGS & DEBUG_TAGS) {
PRINT_LUN(np, cp->target, cp->lun);
printf ("ccb @%p freeing tag %d.\n", cp, cp->tag);
}
/*
* If LCB available,
*/
if (lp) {
/*
* If tagged, release the tag, set the reselect path.
*/
if (cp->tag != NO_TAG) {
/*
* Free the tag value.
*/
lp->cb_tags[lp->if_tag] = cp->tag;
if (++lp->if_tag == SYM_CONF_MAX_TASK)
lp->if_tag = 0;
/*
* Make the reselect path invalid,
* and uncount this CCB.
*/
lp->itlq_tbl[cp->tag] = cpu_to_scr(np->bad_itlq_ba);
--lp->busy_itlq;
} else { /* Untagged */
/*
* Make the reselect path invalid,
* and uncount this CCB.
*/
lp->head.itl_task_sa = cpu_to_scr(np->bad_itl_ba);
lp->busy_itl = 0;
}
/*
* If no JOB active, make the LUN reselect path invalid.
*/
if (lp->busy_itlq == 0 && lp->busy_itl == 0)
lp->head.resel_sa =
cpu_to_scr(SCRIPTB_BA (np, resel_bad_lun));
}
/*
* Otherwise, we only accept 1 IO per LUN.
* Clear the bit that keeps track of this IO.
*/
else
sym_clr_bit(tp->busy0_map, cp->lun);
/*
* We donnot queue more than 1 ccb per target
* with negotiation at any time. If this ccb was
* used for negotiation, clear this info in the tcb.
*/
if (cp == tp->nego_cp)
tp->nego_cp = NULL;
#ifdef SYM_CONF_IARB_SUPPORT
/*
* If we just complete the last queued CCB,
* clear this info that is no longer relevant.
*/
if (cp == np->last_cp)
np->last_cp = NULL;
#endif
/*
* Unmap user data from DMA map if needed.
*/
if (cp->dmamapped) {
bus_dmamap_unload(np->data_dmat, cp->dmamap);
cp->dmamapped = 0;
}
/*
* Make this CCB available.
*/
cp->cam_ccb = NULL;
cp->host_status = HS_IDLE;
sym_remque(&cp->link_ccbq);
sym_insque_head(&cp->link_ccbq, &np->free_ccbq);
}
/*
* Allocate a CCB from memory and initialize its fixed part.
*/
static ccb_p sym_alloc_ccb(hcb_p np)
{
ccb_p cp = NULL;
int hcode;
SYM_LOCK_ASSERT(MA_NOTOWNED);
/*
* Prevent from allocating more CCBs than we can
* queue to the controller.
*/
if (np->actccbs >= SYM_CONF_MAX_START)
return NULL;
/*
* Allocate memory for this CCB.
*/
cp = sym_calloc_dma(sizeof(struct sym_ccb), "CCB");
if (!cp)
return NULL;
/*
* Allocate a bounce buffer for sense data.
*/
cp->sns_bbuf = sym_calloc_dma(SYM_SNS_BBUF_LEN, "SNS_BBUF");
if (!cp->sns_bbuf)
goto out_free;
/*
* Allocate a map for the DMA of user data.
*/
if (bus_dmamap_create(np->data_dmat, 0, &cp->dmamap))
goto out_free;
/*
* Count it.
*/
np->actccbs++;
/*
* Initialize the callout.
*/
callout_init(&cp->ch, 1);
/*
* Compute the bus address of this ccb.
*/
cp->ccb_ba = vtobus(cp);
/*
* Insert this ccb into the hashed list.
*/
hcode = CCB_HASH_CODE(cp->ccb_ba);
cp->link_ccbh = np->ccbh[hcode];
np->ccbh[hcode] = cp;
/*
* Initialize the start and restart actions.
*/
cp->phys.head.go.start = cpu_to_scr(SCRIPTA_BA (np, idle));
cp->phys.head.go.restart = cpu_to_scr(SCRIPTB_BA (np, bad_i_t_l));
/*
* Initilialyze some other fields.
*/
cp->phys.smsg_ext.addr = cpu_to_scr(HCB_BA(np, msgin[2]));
/*
* Chain into free ccb queue.
*/
sym_insque_head(&cp->link_ccbq, &np->free_ccbq);
return cp;
out_free:
if (cp->sns_bbuf)
sym_mfree_dma(cp->sns_bbuf, SYM_SNS_BBUF_LEN, "SNS_BBUF");
sym_mfree_dma(cp, sizeof(*cp), "CCB");
return NULL;
}
/*
* Look up a CCB from a DSA value.
*/
static ccb_p sym_ccb_from_dsa(hcb_p np, u32 dsa)
{
int hcode;
ccb_p cp;
hcode = CCB_HASH_CODE(dsa);
cp = np->ccbh[hcode];
while (cp) {
if (cp->ccb_ba == dsa)
break;
cp = cp->link_ccbh;
}
return cp;
}
/*
* Lun control block allocation and initialization.
*/
static lcb_p sym_alloc_lcb (hcb_p np, u_char tn, u_char ln)
{
tcb_p tp = &np->target[tn];
lcb_p lp = sym_lp(tp, ln);
/*
* Already done, just return.
*/
if (lp)
return lp;
/*
* Check against some race.
*/
assert(!sym_is_bit(tp->busy0_map, ln));
/*
* Allocate the LCB bus address array.
* Compute the bus address of this table.
*/
if (ln && !tp->luntbl) {
int i;
tp->luntbl = sym_calloc_dma(256, "LUNTBL");
if (!tp->luntbl)
goto fail;
for (i = 0 ; i < 64 ; i++)
tp->luntbl[i] = cpu_to_scr(vtobus(&np->badlun_sa));
tp->head.luntbl_sa = cpu_to_scr(vtobus(tp->luntbl));
}
/*
* Allocate the table of pointers for LUN(s) > 0, if needed.
*/
if (ln && !tp->lunmp) {
tp->lunmp = sym_calloc(SYM_CONF_MAX_LUN * sizeof(lcb_p),
"LUNMP");
if (!tp->lunmp)
goto fail;
}
/*
* Allocate the lcb.
* Make it available to the chip.
*/
lp = sym_calloc_dma(sizeof(struct sym_lcb), "LCB");
if (!lp)
goto fail;
if (ln) {
tp->lunmp[ln] = lp;
tp->luntbl[ln] = cpu_to_scr(vtobus(lp));
}
else {
tp->lun0p = lp;
tp->head.lun0_sa = cpu_to_scr(vtobus(lp));
}
/*
* Let the itl task point to error handling.
*/
lp->head.itl_task_sa = cpu_to_scr(np->bad_itl_ba);
/*
* Set the reselect pattern to our default. :)
*/
lp->head.resel_sa = cpu_to_scr(SCRIPTB_BA (np, resel_bad_lun));
/*
* Set user capabilities.
*/
lp->user_flags = tp->usrflags & (SYM_DISC_ENABLED | SYM_TAGS_ENABLED);
fail:
return lp;
}
/*
* Allocate LCB resources for tagged command queuing.
*/
static void sym_alloc_lcb_tags (hcb_p np, u_char tn, u_char ln)
{
tcb_p tp = &np->target[tn];
lcb_p lp = sym_lp(tp, ln);
int i;
/*
* If LCB not available, try to allocate it.
*/
if (!lp && !(lp = sym_alloc_lcb(np, tn, ln)))
return;
/*
* Allocate the task table and and the tag allocation
* circular buffer. We want both or none.
*/
lp->itlq_tbl = sym_calloc_dma(SYM_CONF_MAX_TASK*4, "ITLQ_TBL");
if (!lp->itlq_tbl)
return;
lp->cb_tags = sym_calloc(SYM_CONF_MAX_TASK, "CB_TAGS");
if (!lp->cb_tags) {
sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK*4, "ITLQ_TBL");
lp->itlq_tbl = NULL;
return;
}
/*
* Initialize the task table with invalid entries.
*/
for (i = 0 ; i < SYM_CONF_MAX_TASK ; i++)
lp->itlq_tbl[i] = cpu_to_scr(np->notask_ba);
/*
* Fill up the tag buffer with tag numbers.
*/
for (i = 0 ; i < SYM_CONF_MAX_TASK ; i++)
lp->cb_tags[i] = i;
/*
* Make the task table available to SCRIPTS,
* And accept tagged commands now.
*/
lp->head.itlq_tbl_sa = cpu_to_scr(vtobus(lp->itlq_tbl));
}
/*
* Test the pci bus snoop logic :-(
*
* Has to be called with interrupts disabled.
*/
#ifndef SYM_CONF_IOMAPPED
static int sym_regtest (hcb_p np)
{
register volatile u32 data;
/*
* chip registers may NOT be cached.
* write 0xffffffff to a read only register area,
* and try to read it back.
*/
data = 0xffffffff;
OUTL_OFF(offsetof(struct sym_reg, nc_dstat), data);
data = INL_OFF(offsetof(struct sym_reg, nc_dstat));
#if 1
if (data == 0xffffffff) {
#else
if ((data & 0xe2f0fffd) != 0x02000080) {
#endif
printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
(unsigned) data);
return (0x10);
}
return (0);
}
#endif
static int sym_snooptest (hcb_p np)
{
u32 sym_rd, sym_wr, sym_bk, host_rd, host_wr, pc, dstat;
int i, err=0;
#ifndef SYM_CONF_IOMAPPED
err |= sym_regtest (np);
if (err) return (err);
#endif
restart_test:
/*
* Enable Master Parity Checking as we intend
* to enable it for normal operations.
*/
OUTB (nc_ctest4, (np->rv_ctest4 & MPEE));
/*
* init
*/
pc = SCRIPTB0_BA (np, snooptest);
host_wr = 1;
sym_wr = 2;
/*
* Set memory and register.
*/
np->cache = cpu_to_scr(host_wr);
OUTL (nc_temp, sym_wr);
/*
* Start script (exchange values)
*/
OUTL (nc_dsa, np->hcb_ba);
OUTL_DSP (pc);
/*
* Wait 'til done (with timeout)
*/
for (i=0; i<SYM_SNOOP_TIMEOUT; i++)
if (INB(nc_istat) & (INTF|SIP|DIP))
break;
if (i>=SYM_SNOOP_TIMEOUT) {
printf ("CACHE TEST FAILED: timeout.\n");
return (0x20);
}
/*
* Check for fatal DMA errors.
*/
dstat = INB (nc_dstat);
#if 1 /* Band aiding for broken hardwares that fail PCI parity */
if ((dstat & MDPE) && (np->rv_ctest4 & MPEE)) {
printf ("%s: PCI DATA PARITY ERROR DETECTED - "
"DISABLING MASTER DATA PARITY CHECKING.\n",
sym_name(np));
np->rv_ctest4 &= ~MPEE;
goto restart_test;
}
#endif
if (dstat & (MDPE|BF|IID)) {
printf ("CACHE TEST FAILED: DMA error (dstat=0x%02x).", dstat);
return (0x80);
}
/*
* Save termination position.
*/
pc = INL (nc_dsp);
/*
* Read memory and register.
*/
host_rd = scr_to_cpu(np->cache);
sym_rd = INL (nc_scratcha);
sym_bk = INL (nc_temp);
/*
* Check termination position.
*/
if (pc != SCRIPTB0_BA (np, snoopend)+8) {
printf ("CACHE TEST FAILED: script execution failed.\n");
printf ("start=%08lx, pc=%08lx, end=%08lx\n",
(u_long) SCRIPTB0_BA (np, snooptest), (u_long) pc,
(u_long) SCRIPTB0_BA (np, snoopend) +8);
return (0x40);
}
/*
* Show results.
*/
if (host_wr != sym_rd) {
printf ("CACHE TEST FAILED: host wrote %d, chip read %d.\n",
(int) host_wr, (int) sym_rd);
err |= 1;
}
if (host_rd != sym_wr) {
printf ("CACHE TEST FAILED: chip wrote %d, host read %d.\n",
(int) sym_wr, (int) host_rd);
err |= 2;
}
if (sym_bk != sym_wr) {
printf ("CACHE TEST FAILED: chip wrote %d, read back %d.\n",
(int) sym_wr, (int) sym_bk);
err |= 4;
}
return (err);
}
/*
* Determine the chip's clock frequency.
*
* This is essential for the negotiation of the synchronous
* transfer rate.
*
* Note: we have to return the correct value.
* THERE IS NO SAFE DEFAULT VALUE.
*
* Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
* 53C860 and 53C875 rev. 1 support fast20 transfers but
* do not have a clock doubler and so are provided with a
* 80 MHz clock. All other fast20 boards incorporate a doubler
* and so should be delivered with a 40 MHz clock.
* The recent fast40 chips (895/896/895A/1010) use a 40 Mhz base
* clock and provide a clock quadrupler (160 Mhz).
*/
/*
* Select SCSI clock frequency
*/
static void sym_selectclock(hcb_p np, u_char scntl3)
{
/*
* If multiplier not present or not selected, leave here.
*/
if (np->multiplier <= 1) {
OUTB(nc_scntl3, scntl3);
return;
}
if (sym_verbose >= 2)
printf ("%s: enabling clock multiplier\n", sym_name(np));
OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */
/*
* Wait for the LCKFRQ bit to be set if supported by the chip.
* Otherwise wait 20 micro-seconds.
*/
if (np->features & FE_LCKFRQ) {
int i = 20;
while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
UDELAY (20);
if (!i)
printf("%s: the chip cannot lock the frequency\n",
sym_name(np));
} else
UDELAY (20);
OUTB(nc_stest3, HSC); /* Halt the scsi clock */
OUTB(nc_scntl3, scntl3);
OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
OUTB(nc_stest3, 0x00); /* Restart scsi clock */
}
/*
* calculate SCSI clock frequency (in KHz)
*/
static unsigned getfreq (hcb_p np, int gen)
{
unsigned int ms = 0;
unsigned int f;
/*
* Measure GEN timer delay in order
* to calculate SCSI clock frequency
*
* This code will never execute too
* many loop iterations (if DELAY is
* reasonably correct). It could get
* too low a delay (too high a freq.)
* if the CPU is slow executing the
* loop for some reason (an NMI, for
* example). For this reason we will
* if multiple measurements are to be
* performed trust the higher delay
* (lower frequency returned).
*/
OUTW (nc_sien , 0); /* mask all scsi interrupts */
(void) INW (nc_sist); /* clear pending scsi interrupt */
OUTB (nc_dien , 0); /* mask all dma interrupts */
(void) INW (nc_sist); /* another one, just to be sure :) */
OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */
OUTB (nc_stime1, 0); /* disable general purpose timer */
OUTB (nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */
while (!(INW(nc_sist) & GEN) && ms++ < 100000)
UDELAY (1000); /* count ms */
OUTB (nc_stime1, 0); /* disable general purpose timer */
/*
* set prescaler to divide by whatever 0 means
* 0 ought to choose divide by 2, but appears
* to set divide by 3.5 mode in my 53c810 ...
*/
OUTB (nc_scntl3, 0);
/*
* adjust for prescaler, and convert into KHz
*/
f = ms ? ((1 << gen) * 4340) / ms : 0;
if (sym_verbose >= 2)
printf ("%s: Delay (GEN=%d): %u msec, %u KHz\n",
sym_name(np), gen, ms, f);
return f;
}
static unsigned sym_getfreq (hcb_p np)
{
u_int f1, f2;
int gen = 11;
(void) getfreq (np, gen); /* throw away first result */
f1 = getfreq (np, gen);
f2 = getfreq (np, gen);
if (f1 > f2) f1 = f2; /* trust lower result */
return f1;
}
/*
* Get/probe chip SCSI clock frequency
*/
static void sym_getclock (hcb_p np, int mult)
{
unsigned char scntl3 = np->sv_scntl3;
unsigned char stest1 = np->sv_stest1;
unsigned f1;
/*
* For the C10 core, assume 40 MHz.
*/
if (np->features & FE_C10) {
np->multiplier = mult;
np->clock_khz = 40000 * mult;
return;
}
np->multiplier = 1;
f1 = 40000;
/*
* True with 875/895/896/895A with clock multiplier selected
*/
if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
if (sym_verbose >= 2)
printf ("%s: clock multiplier found\n", sym_name(np));
np->multiplier = mult;
}
/*
* If multiplier not found or scntl3 not 7,5,3,
* reset chip and get frequency from general purpose timer.
* Otherwise trust scntl3 BIOS setting.
*/
if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) {
OUTB (nc_stest1, 0); /* make sure doubler is OFF */
f1 = sym_getfreq (np);
if (sym_verbose)
printf ("%s: chip clock is %uKHz\n", sym_name(np), f1);
if (f1 < 45000) f1 = 40000;
else if (f1 < 55000) f1 = 50000;
else f1 = 80000;
if (f1 < 80000 && mult > 1) {
if (sym_verbose >= 2)
printf ("%s: clock multiplier assumed\n",
sym_name(np));
np->multiplier = mult;
}
} else {
if ((scntl3 & 7) == 3) f1 = 40000;
else if ((scntl3 & 7) == 5) f1 = 80000;
else f1 = 160000;
f1 /= np->multiplier;
}
/*
* Compute controller synchronous parameters.
*/
f1 *= np->multiplier;
np->clock_khz = f1;
}
/*
* Get/probe PCI clock frequency
*/
static int sym_getpciclock (hcb_p np)
{
int f = 0;
/*
* For the C1010-33, this doesn't work.
* For the C1010-66, this will be tested when I'll have
* such a beast to play with.
*/
if (!(np->features & FE_C10)) {
OUTB (nc_stest1, SCLK); /* Use the PCI clock as SCSI clock */
f = (int) sym_getfreq (np);
OUTB (nc_stest1, 0);
}
np->pciclk_khz = f;
return f;
}
/*============= DRIVER ACTION/COMPLETION ====================*/
/*
* Print something that tells about extended errors.
*/
static void sym_print_xerr(ccb_p cp, int x_status)
{
if (x_status & XE_PARITY_ERR) {
PRINT_ADDR(cp);
printf ("unrecovered SCSI parity error.\n");
}
if (x_status & XE_EXTRA_DATA) {
PRINT_ADDR(cp);
printf ("extraneous data discarded.\n");
}
if (x_status & XE_BAD_PHASE) {
PRINT_ADDR(cp);
printf ("illegal scsi phase (4/5).\n");
}
if (x_status & XE_SODL_UNRUN) {
PRINT_ADDR(cp);
printf ("ODD transfer in DATA OUT phase.\n");
}
if (x_status & XE_SWIDE_OVRUN) {
PRINT_ADDR(cp);
printf ("ODD transfer in DATA IN phase.\n");
}
}
/*
* Choose the more appropriate CAM status if
* the IO encountered an extended error.
*/
static int sym_xerr_cam_status(int cam_status, int x_status)
{
if (x_status) {
if (x_status & XE_PARITY_ERR)
cam_status = CAM_UNCOR_PARITY;
else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
cam_status = CAM_DATA_RUN_ERR;
else if (x_status & XE_BAD_PHASE)
cam_status = CAM_REQ_CMP_ERR;
else
cam_status = CAM_REQ_CMP_ERR;
}
return cam_status;
}
/*
* Complete execution of a SCSI command with extented
* error, SCSI status error, or having been auto-sensed.
*
* The SCRIPTS processor is not running there, so we
* can safely access IO registers and remove JOBs from
* the START queue.
* SCRATCHA is assumed to have been loaded with STARTPOS
* before the SCRIPTS called the C code.
*/
static void sym_complete_error (hcb_p np, ccb_p cp)
{
struct ccb_scsiio *csio;
u_int cam_status;
int i, sense_returned;
SYM_LOCK_ASSERT(MA_OWNED);
/*
* Paranoid check. :)
*/
if (!cp || !cp->cam_ccb)
return;
if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_RESULT)) {
printf ("CCB=%lx STAT=%x/%x/%x DEV=%d/%d\n", (unsigned long)cp,
cp->host_status, cp->ssss_status, cp->host_flags,
cp->target, cp->lun);
MDELAY(100);
}
/*
* Get CAM command pointer.
*/
csio = &cp->cam_ccb->csio;
/*
* Check for extended errors.
*/
if (cp->xerr_status) {
if (sym_verbose)
sym_print_xerr(cp, cp->xerr_status);
if (cp->host_status == HS_COMPLETE)
cp->host_status = HS_COMP_ERR;
}
/*
* Calculate the residual.
*/
csio->sense_resid = 0;
csio->resid = sym_compute_residual(np, cp);
if (!SYM_CONF_RESIDUAL_SUPPORT) {/* If user does not want residuals */
csio->resid = 0; /* throw them away. :) */
cp->sv_resid = 0;
}
if (cp->host_flags & HF_SENSE) { /* Auto sense */
csio->scsi_status = cp->sv_scsi_status; /* Restore status */
csio->sense_resid = csio->resid; /* Swap residuals */
csio->resid = cp->sv_resid;
cp->sv_resid = 0;
if (sym_verbose && cp->sv_xerr_status)
sym_print_xerr(cp, cp->sv_xerr_status);
if (cp->host_status == HS_COMPLETE &&
cp->ssss_status == S_GOOD &&
cp->xerr_status == 0) {
cam_status = sym_xerr_cam_status(CAM_SCSI_STATUS_ERROR,
cp->sv_xerr_status);
cam_status |= CAM_AUTOSNS_VALID;
/*
* Bounce back the sense data to user and
* fix the residual.
*/
bzero(&csio->sense_data, sizeof(csio->sense_data));
sense_returned = SYM_SNS_BBUF_LEN - csio->sense_resid;
if (sense_returned < csio->sense_len)
csio->sense_resid = csio->sense_len -
sense_returned;
else
csio->sense_resid = 0;
bcopy(cp->sns_bbuf, &csio->sense_data,
MIN(csio->sense_len, sense_returned));
#if 0
/*
* If the device reports a UNIT ATTENTION condition
* due to a RESET condition, we should consider all
* disconnect CCBs for this unit as aborted.
*/
if (1) {
u_char *p;
p = (u_char *) csio->sense_data;
if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
sym_clear_tasks(np, CAM_REQ_ABORTED,
cp->target,cp->lun, -1);
}
#endif
}
else
cam_status = CAM_AUTOSENSE_FAIL;
}
else if (cp->host_status == HS_COMPLETE) { /* Bad SCSI status */
csio->scsi_status = cp->ssss_status;
cam_status = CAM_SCSI_STATUS_ERROR;
}
else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
cam_status = CAM_SEL_TIMEOUT;
else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
cam_status = CAM_UNEXP_BUSFREE;
else { /* Extended error */
if (sym_verbose) {
PRINT_ADDR(cp);
printf ("COMMAND FAILED (%x %x %x).\n",
cp->host_status, cp->ssss_status,
cp->xerr_status);
}
csio->scsi_status = cp->ssss_status;
/*
* Set the most appropriate value for CAM status.
*/
cam_status = sym_xerr_cam_status(CAM_REQ_CMP_ERR,
cp->xerr_status);
}
/*
* Dequeue all queued CCBs for that device
* not yet started by SCRIPTS.
*/
i = (INL (nc_scratcha) - np->squeue_ba) / 4;
(void) sym_dequeue_from_squeue(np, i, cp->target, cp->lun, -1);
/*
* Restart the SCRIPTS processor.
*/
OUTL_DSP (SCRIPTA_BA (np, start));
/*
* Synchronize DMA map if needed.
*/
if (cp->dmamapped) {
bus_dmamap_sync(np->data_dmat, cp->dmamap,
(cp->dmamapped == SYM_DMA_READ ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE));
}
/*
* Add this one to the COMP queue.
* Complete all those commands with either error
* or requeue condition.
*/
sym_set_cam_status((union ccb *) csio, cam_status);
sym_remque(&cp->link_ccbq);
sym_insque_head(&cp->link_ccbq, &np->comp_ccbq);
sym_flush_comp_queue(np, 0);
}
/*
* Complete execution of a successful SCSI command.
*
* Only successful commands go to the DONE queue,
* since we need to have the SCRIPTS processor
* stopped on any error condition.
* The SCRIPTS processor is running while we are
* completing successful commands.
*/
static void sym_complete_ok (hcb_p np, ccb_p cp)
{
struct ccb_scsiio *csio;
tcb_p tp;
lcb_p lp;
SYM_LOCK_ASSERT(MA_OWNED);
/*
* Paranoid check. :)
*/
if (!cp || !cp->cam_ccb)
return;
assert (cp->host_status == HS_COMPLETE);
/*
* Get command, target and lun pointers.
*/
csio = &cp->cam_ccb->csio;
tp = &np->target[cp->target];
lp = sym_lp(tp, cp->lun);
/*
* Assume device discovered on first success.
*/
if (!lp)
sym_set_bit(tp->lun_map, cp->lun);
/*
* If all data have been transferred, given than no
* extended error did occur, there is no residual.
*/
csio->resid = 0;
if (cp->phys.head.lastp != cp->phys.head.goalp)
csio->resid = sym_compute_residual(np, cp);
/*
* Wrong transfer residuals may be worse than just always
* returning zero. User can disable this feature from
* sym_conf.h. Residual support is enabled by default.
*/
if (!SYM_CONF_RESIDUAL_SUPPORT)
csio->resid = 0;
/*
* Synchronize DMA map if needed.
*/
if (cp->dmamapped) {
bus_dmamap_sync(np->data_dmat, cp->dmamap,
(cp->dmamapped == SYM_DMA_READ ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE));
}
/*
* Set status and complete the command.
*/
csio->scsi_status = cp->ssss_status;
sym_set_cam_status((union ccb *) csio, CAM_REQ_CMP);
sym_xpt_done(np, (union ccb *) csio, cp);
sym_free_ccb(np, cp);
}
/*
* Our callout handler
*/
static void sym_callout(void *arg)
{
union ccb *ccb = (union ccb *) arg;
hcb_p np = ccb->ccb_h.sym_hcb_ptr;
/*
* Check that the CAM CCB is still queued.
*/
if (!np)
return;
SYM_LOCK();
switch(ccb->ccb_h.func_code) {
case XPT_SCSI_IO:
(void) sym_abort_scsiio(np, ccb, 1);
break;
default:
break;
}
SYM_UNLOCK();
}
/*
* Abort an SCSI IO.
*/
static int sym_abort_scsiio(hcb_p np, union ccb *ccb, int timed_out)
{
ccb_p cp;
SYM_QUEHEAD *qp;
SYM_LOCK_ASSERT(MA_OWNED);
/*
* Look up our CCB control block.
*/
cp = NULL;
FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
ccb_p cp2 = sym_que_entry(qp, struct sym_ccb, link_ccbq);
if (cp2->cam_ccb == ccb) {
cp = cp2;
break;
}
}
if (!cp || cp->host_status == HS_WAIT)
return -1;
/*
* If a previous abort didn't succeed in time,
* perform a BUS reset.
*/
if (cp->to_abort) {
sym_reset_scsi_bus(np, 1);
return 0;
}
/*
* Mark the CCB for abort and allow time for.
*/
cp->to_abort = timed_out ? 2 : 1;
callout_reset(&cp->ch, 10 * hz, sym_callout, (caddr_t) ccb);
/*
* Tell the SCRIPTS processor to stop and synchronize with us.
*/
np->istat_sem = SEM;
OUTB (nc_istat, SIGP|SEM);
return 0;
}
/*
* Reset a SCSI device (all LUNs of a target).
*/
static void sym_reset_dev(hcb_p np, union ccb *ccb)
{
tcb_p tp;
struct ccb_hdr *ccb_h = &ccb->ccb_h;
SYM_LOCK_ASSERT(MA_OWNED);
if (ccb_h->target_id == np->myaddr ||
ccb_h->target_id >= SYM_CONF_MAX_TARGET ||
ccb_h->target_lun >= SYM_CONF_MAX_LUN) {
sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
return;
}
tp = &np->target[ccb_h->target_id];
tp->to_reset = 1;
sym_xpt_done2(np, ccb, CAM_REQ_CMP);
np->istat_sem = SEM;
OUTB (nc_istat, SIGP|SEM);
}
/*
* SIM action entry point.
*/
static void sym_action(struct cam_sim *sim, union ccb *ccb)
{
hcb_p np;
tcb_p tp;
lcb_p lp;
ccb_p cp;
int tmp;
u_char idmsg, *msgptr;
u_int msglen;
struct ccb_scsiio *csio;
struct ccb_hdr *ccb_h;
CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("sym_action\n"));
/*
* Retrieve our controller data structure.
*/
np = (hcb_p) cam_sim_softc(sim);
SYM_LOCK_ASSERT(MA_OWNED);
/*
* The common case is SCSI IO.
* We deal with other ones elsewhere.
*/
if (ccb->ccb_h.func_code != XPT_SCSI_IO) {
sym_action2(sim, ccb);
return;
}
csio = &ccb->csio;
ccb_h = &csio->ccb_h;
/*
* Work around races.
*/
if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
xpt_done(ccb);
return;
}
/*
* Minimal checkings, so that we will not
* go outside our tables.
*/
if (ccb_h->target_id == np->myaddr ||
ccb_h->target_id >= SYM_CONF_MAX_TARGET ||
ccb_h->target_lun >= SYM_CONF_MAX_LUN) {
sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
return;
}
/*
* Retrieve the target and lun descriptors.
*/
tp = &np->target[ccb_h->target_id];
lp = sym_lp(tp, ccb_h->target_lun);
/*
* Complete the 1st INQUIRY command with error
* condition if the device is flagged NOSCAN
* at BOOT in the NVRAM. This may speed up
* the boot and maintain coherency with BIOS
* device numbering. Clearing the flag allows
* user to rescan skipped devices later.
* We also return error for devices not flagged
* for SCAN LUNS in the NVRAM since some mono-lun
* devices behave badly when asked for some non
* zero LUN. Btw, this is an absolute hack.:-)
*/
if (!(ccb_h->flags & CAM_CDB_PHYS) &&
(0x12 == ((ccb_h->flags & CAM_CDB_POINTER) ?
csio->cdb_io.cdb_ptr[0] : csio->cdb_io.cdb_bytes[0]))) {
if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
((tp->usrflags & SYM_SCAN_LUNS_DISABLED) &&
ccb_h->target_lun != 0)) {
tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
return;
}
}
/*
* Get a control block for this IO.
*/
tmp = ((ccb_h->flags & CAM_TAG_ACTION_VALID) != 0);
cp = sym_get_ccb(np, ccb_h->target_id, ccb_h->target_lun, tmp);
if (!cp) {
sym_xpt_done2(np, ccb, CAM_RESRC_UNAVAIL);
return;
}
/*
* Keep track of the IO in our CCB.
*/
cp->cam_ccb = ccb;
/*
* Build the IDENTIFY message.
*/
idmsg = M_IDENTIFY | cp->lun;
if (cp->tag != NO_TAG || (lp && (lp->current_flags & SYM_DISC_ENABLED)))
idmsg |= 0x40;
msgptr = cp->scsi_smsg;
msglen = 0;
msgptr[msglen++] = idmsg;
/*
* Build the tag message if present.
*/
if (cp->tag != NO_TAG) {
u_char order = csio->tag_action;
switch(order) {
case M_ORDERED_TAG:
break;
case M_HEAD_TAG:
break;
default:
order = M_SIMPLE_TAG;
}
msgptr[msglen++] = order;
/*
* For less than 128 tags, actual tags are numbered
* 1,3,5,..2*MAXTAGS+1,since we may have to deal
* with devices that have problems with #TAG 0 or too
* great #TAG numbers. For more tags (up to 256),
* we use directly our tag number.
*/
#if SYM_CONF_MAX_TASK > (512/4)
msgptr[msglen++] = cp->tag;
#else
msgptr[msglen++] = (cp->tag << 1) + 1;
#endif
}
/*
* Build a negotiation message if needed.
* (nego_status is filled by sym_prepare_nego())
*/
cp->nego_status = 0;
if (tp->tinfo.current.width != tp->tinfo.goal.width ||
tp->tinfo.current.period != tp->tinfo.goal.period ||
tp->tinfo.current.offset != tp->tinfo.goal.offset ||
tp->tinfo.current.options != tp->tinfo.goal.options) {
if (!tp->nego_cp && lp)
msglen += sym_prepare_nego(np, cp, 0, msgptr + msglen);
}
/*
* Fill in our ccb
*/
/*
* Startqueue
*/
cp->phys.head.go.start = cpu_to_scr(SCRIPTA_BA (np, select));
cp->phys.head.go.restart = cpu_to_scr(SCRIPTA_BA (np, resel_dsa));
/*
* select
*/
cp->phys.select.sel_id = cp->target;
cp->phys.select.sel_scntl3 = tp->head.wval;
cp->phys.select.sel_sxfer = tp->head.sval;
cp->phys.select.sel_scntl4 = tp->head.uval;
/*
* message
*/
cp->phys.smsg.addr = cpu_to_scr(CCB_BA (cp, scsi_smsg));
cp->phys.smsg.size = cpu_to_scr(msglen);
/*
* command
*/
if (sym_setup_cdb(np, csio, cp) < 0) {
sym_xpt_done(np, ccb, cp);
sym_free_ccb(np, cp);
return;
}
/*
* status
*/
#if 0 /* Provision */
cp->actualquirks = tp->quirks;
#endif
cp->actualquirks = SYM_QUIRK_AUTOSAVE;
cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
cp->ssss_status = S_ILLEGAL;
cp->xerr_status = 0;
cp->host_flags = 0;
cp->extra_bytes = 0;
/*
* extreme data pointer.
* shall be positive, so -1 is lower than lowest.:)
*/
cp->ext_sg = -1;
cp->ext_ofs = 0;
/*
* Build the data descriptor block
* and start the IO.
*/
sym_setup_data_and_start(np, csio, cp);
}
/*
* Setup buffers and pointers that address the CDB.
* I bet, physical CDBs will never be used on the planet,
* since they can be bounced without significant overhead.
*/
static int sym_setup_cdb(hcb_p np, struct ccb_scsiio *csio, ccb_p cp)
{
struct ccb_hdr *ccb_h;
u32 cmd_ba;
int cmd_len;
SYM_LOCK_ASSERT(MA_OWNED);
ccb_h = &csio->ccb_h;
/*
* CDB is 16 bytes max.
*/
if (csio->cdb_len > sizeof(cp->cdb_buf)) {
sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID);
return -1;
}
cmd_len = csio->cdb_len;
if (ccb_h->flags & CAM_CDB_POINTER) {
/* CDB is a pointer */
if (!(ccb_h->flags & CAM_CDB_PHYS)) {
/* CDB pointer is virtual */
bcopy(csio->cdb_io.cdb_ptr, cp->cdb_buf, cmd_len);
cmd_ba = CCB_BA (cp, cdb_buf[0]);
} else {
/* CDB pointer is physical */
#if 0
cmd_ba = ((u32)csio->cdb_io.cdb_ptr) & 0xffffffff;
#else
sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID);
return -1;
#endif
}
} else {
/* CDB is in the CAM ccb (buffer) */
bcopy(csio->cdb_io.cdb_bytes, cp->cdb_buf, cmd_len);
cmd_ba = CCB_BA (cp, cdb_buf[0]);
}
cp->phys.cmd.addr = cpu_to_scr(cmd_ba);
cp->phys.cmd.size = cpu_to_scr(cmd_len);
return 0;
}
/*
* Set up data pointers used by SCRIPTS.
*/
static void __inline
sym_setup_data_pointers(hcb_p np, ccb_p cp, int dir)
{
u32 lastp, goalp;
SYM_LOCK_ASSERT(MA_OWNED);
/*
* No segments means no data.
*/
if (!cp->segments)
dir = CAM_DIR_NONE;
/*
* Set the data pointer.
*/
switch(dir) {
case CAM_DIR_OUT:
goalp = SCRIPTA_BA (np, data_out2) + 8;
lastp = goalp - 8 - (cp->segments * (2*4));
break;
case CAM_DIR_IN:
cp->host_flags |= HF_DATA_IN;
goalp = SCRIPTA_BA (np, data_in2) + 8;
lastp = goalp - 8 - (cp->segments * (2*4));
break;
case CAM_DIR_NONE:
default:
lastp = goalp = SCRIPTB_BA (np, no_data);
break;
}
cp->phys.head.lastp = cpu_to_scr(lastp);
cp->phys.head.goalp = cpu_to_scr(goalp);
cp->phys.head.savep = cpu_to_scr(lastp);
cp->startp = cp->phys.head.savep;
}
/*
* Call back routine for the DMA map service.
* If bounce buffers are used (why ?), we may sleep and then
* be called there in another context.
*/
static void
sym_execute_ccb(void *arg, bus_dma_segment_t *psegs, int nsegs, int error)
{
ccb_p cp;
hcb_p np;
union ccb *ccb;
cp = (ccb_p) arg;
ccb = cp->cam_ccb;
np = (hcb_p) cp->arg;
SYM_LOCK_ASSERT(MA_OWNED);
/*
* Deal with weird races.
*/
if (sym_get_cam_status(ccb) != CAM_REQ_INPROG)
goto out_abort;
/*
* Deal with weird errors.
*/
if (error) {
cp->dmamapped = 0;
sym_set_cam_status(cp->cam_ccb, CAM_REQ_ABORTED);
goto out_abort;
}
/*
* Build the data descriptor for the chip.
*/
if (nsegs) {
int retv;
/* 896 rev 1 requires to be careful about boundaries */
if (np->device_id == PCI_ID_SYM53C896 && np->revision_id <= 1)
retv = sym_scatter_sg_physical(np, cp, psegs, nsegs);
else
retv = sym_fast_scatter_sg_physical(np,cp, psegs,nsegs);
if (retv < 0) {
sym_set_cam_status(cp->cam_ccb, CAM_REQ_TOO_BIG);
goto out_abort;
}
}
/*
* Synchronize the DMA map only if we have
* actually mapped the data.
*/
if (cp->dmamapped) {
bus_dmamap_sync(np->data_dmat, cp->dmamap,
(cp->dmamapped == SYM_DMA_READ ?
BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE));
}
/*
* Set host status to busy state.
* May have been set back to HS_WAIT to avoid a race.
*/
cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
/*
* Set data pointers.
*/
sym_setup_data_pointers(np, cp, (ccb->ccb_h.flags & CAM_DIR_MASK));
/*
* Enqueue this IO in our pending queue.
*/
sym_enqueue_cam_ccb(cp);
/*
* When `#ifed 1', the code below makes the driver
* panic on the first attempt to write to a SCSI device.
* It is the first test we want to do after a driver
* change that does not seem obviously safe. :)
*/
#if 0
switch (cp->cdb_buf[0]) {
case 0x0A: case 0x2A: case 0xAA:
panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
MDELAY(10000);
break;
default:
break;
}
#endif
/*
* Activate this job.
*/
sym_put_start_queue(np, cp);
return;
out_abort:
sym_xpt_done(np, ccb, cp);
sym_free_ccb(np, cp);
}
/*
* How complex it gets to deal with the data in CAM.
* The Bus Dma stuff makes things still more complex.
*/
static void
sym_setup_data_and_start(hcb_p np, struct ccb_scsiio *csio, ccb_p cp)
{
struct ccb_hdr *ccb_h;
int dir, retv;
SYM_LOCK_ASSERT(MA_OWNED);
ccb_h = &csio->ccb_h;
/*
* Now deal with the data.
*/
cp->data_len = csio->dxfer_len;
cp->arg = np;
/*
* No direction means no data.
*/
dir = (ccb_h->flags & CAM_DIR_MASK);
if (dir == CAM_DIR_NONE) {
sym_execute_ccb(cp, NULL, 0, 0);
return;
}
cp->dmamapped = (dir == CAM_DIR_IN) ? SYM_DMA_READ : SYM_DMA_WRITE;
retv = bus_dmamap_load_ccb(np->data_dmat, cp->dmamap,
(union ccb *)csio, sym_execute_ccb, cp, 0);
if (retv == EINPROGRESS) {
cp->host_status = HS_WAIT;
xpt_freeze_simq(np->sim, 1);
csio->ccb_h.status |= CAM_RELEASE_SIMQ;
}
}
/*
* Move the scatter list to our data block.
*/
static int
sym_fast_scatter_sg_physical(hcb_p np, ccb_p cp,
bus_dma_segment_t *psegs, int nsegs)
{
struct sym_tblmove *data;
bus_dma_segment_t *psegs2;
SYM_LOCK_ASSERT(MA_OWNED);
if (nsegs > SYM_CONF_MAX_SG)
return -1;
data = &cp->phys.data[SYM_CONF_MAX_SG-1];
psegs2 = &psegs[nsegs-1];
cp->segments = nsegs;
while (1) {
data->addr = cpu_to_scr(psegs2->ds_addr);
data->size = cpu_to_scr(psegs2->ds_len);
if (DEBUG_FLAGS & DEBUG_SCATTER) {
printf ("%s scatter: paddr=%lx len=%ld\n",
sym_name(np), (long) psegs2->ds_addr,
(long) psegs2->ds_len);
}
if (psegs2 != psegs) {
--data;
--psegs2;
continue;
}
break;
}
return 0;
}
/*
* Scatter a SG list with physical addresses into bus addressable chunks.
*/
static int
sym_scatter_sg_physical(hcb_p np, ccb_p cp, bus_dma_segment_t *psegs, int nsegs)
{
u_long ps, pe, pn;
u_long k;
int s, t;
SYM_LOCK_ASSERT(MA_OWNED);
s = SYM_CONF_MAX_SG - 1;
t = nsegs - 1;
ps = psegs[t].ds_addr;
pe = ps + psegs[t].ds_len;
while (s >= 0) {
pn = rounddown2(pe - 1, SYM_CONF_DMA_BOUNDARY);
if (pn <= ps)
pn = ps;
k = pe - pn;
if (DEBUG_FLAGS & DEBUG_SCATTER) {
printf ("%s scatter: paddr=%lx len=%ld\n",
sym_name(np), pn, k);
}
cp->phys.data[s].addr = cpu_to_scr(pn);
cp->phys.data[s].size = cpu_to_scr(k);
--s;
if (pn == ps) {
if (--t < 0)
break;
ps = psegs[t].ds_addr;
pe = ps + psegs[t].ds_len;
}
else
pe = pn;
}
cp->segments = SYM_CONF_MAX_SG - 1 - s;
return t >= 0 ? -1 : 0;
}
/*
* SIM action for non performance critical stuff.
*/
static void sym_action2(struct cam_sim *sim, union ccb *ccb)
{
union ccb *abort_ccb;
struct ccb_hdr *ccb_h;
struct ccb_pathinq *cpi;
struct ccb_trans_settings *cts;
struct sym_trans *tip;
hcb_p np;
tcb_p tp;
lcb_p lp;
u_char dflags;
/*
* Retrieve our controller data structure.
*/
np = (hcb_p) cam_sim_softc(sim);
SYM_LOCK_ASSERT(MA_OWNED);
ccb_h = &ccb->ccb_h;
switch (ccb_h->func_code) {
case XPT_SET_TRAN_SETTINGS:
cts = &ccb->cts;
tp = &np->target[ccb_h->target_id];
/*
* Update SPI transport settings in TARGET control block.
* Update SCSI device settings in LUN control block.
*/
lp = sym_lp(tp, ccb_h->target_lun);
if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
sym_update_trans(np, &tp->tinfo.goal, cts);
if (lp)
sym_update_dflags(np, &lp->current_flags, cts);
}
if (cts->type == CTS_TYPE_USER_SETTINGS) {
sym_update_trans(np, &tp->tinfo.user, cts);
if (lp)
sym_update_dflags(np, &lp->user_flags, cts);
}
sym_xpt_done2(np, ccb, CAM_REQ_CMP);
break;
case XPT_GET_TRAN_SETTINGS:
cts = &ccb->cts;
tp = &np->target[ccb_h->target_id];
lp = sym_lp(tp, ccb_h->target_lun);
#define cts__scsi (&cts->proto_specific.scsi)
#define cts__spi (&cts->xport_specific.spi)
if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
tip = &tp->tinfo.current;
dflags = lp ? lp->current_flags : 0;
}
else {
tip = &tp->tinfo.user;
dflags = lp ? lp->user_flags : tp->usrflags;
}
cts->protocol = PROTO_SCSI;
cts->transport = XPORT_SPI;
cts->protocol_version = tip->scsi_version;
cts->transport_version = tip->spi_version;
cts__spi->sync_period = tip->period;
cts__spi->sync_offset = tip->offset;
cts__spi->bus_width = tip->width;
cts__spi->ppr_options = tip->options;
cts__spi->valid = CTS_SPI_VALID_SYNC_RATE
| CTS_SPI_VALID_SYNC_OFFSET
| CTS_SPI_VALID_BUS_WIDTH
| CTS_SPI_VALID_PPR_OPTIONS;
cts__spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
if (dflags & SYM_DISC_ENABLED)
cts__spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
cts__spi->valid |= CTS_SPI_VALID_DISC;
cts__scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
if (dflags & SYM_TAGS_ENABLED)
cts__scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
cts__scsi->valid |= CTS_SCSI_VALID_TQ;
#undef cts__spi
#undef cts__scsi
sym_xpt_done2(np, ccb, CAM_REQ_CMP);
break;
case XPT_CALC_GEOMETRY:
cam_calc_geometry(&ccb->ccg, /*extended*/1);
sym_xpt_done2(np, ccb, CAM_REQ_CMP);
break;
case XPT_PATH_INQ:
cpi = &ccb->cpi;
cpi->version_num = 1;
cpi->hba_inquiry = PI_MDP_ABLE|PI_SDTR_ABLE|PI_TAG_ABLE;
if ((np->features & FE_WIDE) != 0)
cpi->hba_inquiry |= PI_WIDE_16;
cpi->target_sprt = 0;
cpi->hba_misc = PIM_UNMAPPED;
if (np->usrflags & SYM_SCAN_TARGETS_HILO)
cpi->hba_misc |= PIM_SCANHILO;
if (np->usrflags & SYM_AVOID_BUS_RESET)
cpi->hba_misc |= PIM_NOBUSRESET;
cpi->hba_eng_cnt = 0;
cpi->max_target = (np->features & FE_WIDE) ? 15 : 7;
/* Semantic problem:)LUN number max = max number of LUNs - 1 */
cpi->max_lun = SYM_CONF_MAX_LUN-1;
if (SYM_SETUP_MAX_LUN < SYM_CONF_MAX_LUN)
cpi->max_lun = SYM_SETUP_MAX_LUN-1;
cpi->bus_id = cam_sim_bus(sim);
cpi->initiator_id = np->myaddr;
cpi->base_transfer_speed = 3300;
strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strlcpy(cpi->hba_vid, "Symbios", HBA_IDLEN);
strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->protocol = PROTO_SCSI;
cpi->protocol_version = SCSI_REV_2;
cpi->transport = XPORT_SPI;
cpi->transport_version = 2;
cpi->xport_specific.spi.ppr_options = SID_SPI_CLOCK_ST;
if (np->features & FE_ULTRA3) {
cpi->transport_version = 3;
cpi->xport_specific.spi.ppr_options =
SID_SPI_CLOCK_DT_ST;
}
cpi->maxio = SYM_CONF_MAX_SG * PAGE_SIZE;
sym_xpt_done2(np, ccb, CAM_REQ_CMP);
break;
case XPT_ABORT:
abort_ccb = ccb->cab.abort_ccb;
switch(abort_ccb->ccb_h.func_code) {
case XPT_SCSI_IO:
if (sym_abort_scsiio(np, abort_ccb, 0) == 0) {
sym_xpt_done2(np, ccb, CAM_REQ_CMP);
break;
}
default:
sym_xpt_done2(np, ccb, CAM_UA_ABORT);
break;
}
break;
case XPT_RESET_DEV:
sym_reset_dev(np, ccb);
break;
case XPT_RESET_BUS:
sym_reset_scsi_bus(np, 0);
if (sym_verbose) {
xpt_print_path(np->path);
printf("SCSI BUS reset delivered.\n");
}
sym_init (np, 1);
sym_xpt_done2(np, ccb, CAM_REQ_CMP);
break;
case XPT_TERM_IO:
default:
sym_xpt_done2(np, ccb, CAM_REQ_INVALID);
break;
}
}
/*
* Asynchronous notification handler.
*/
static void
sym_async(void *cb_arg, u32 code, struct cam_path *path, void *args __unused)
{
hcb_p np;
struct cam_sim *sim;
u_int tn;
tcb_p tp;
sim = (struct cam_sim *) cb_arg;
np = (hcb_p) cam_sim_softc(sim);
SYM_LOCK_ASSERT(MA_OWNED);
switch (code) {
case AC_LOST_DEVICE:
tn = xpt_path_target_id(path);
if (tn >= SYM_CONF_MAX_TARGET)
break;
tp = &np->target[tn];
tp->to_reset = 0;
tp->head.sval = 0;
tp->head.wval = np->rv_scntl3;
tp->head.uval = 0;
tp->tinfo.current.period = tp->tinfo.goal.period = 0;
tp->tinfo.current.offset = tp->tinfo.goal.offset = 0;
tp->tinfo.current.width = tp->tinfo.goal.width = BUS_8_BIT;
tp->tinfo.current.options = tp->tinfo.goal.options = 0;
break;
default:
break;
}
}
/*
* Update transfer settings of a target.
*/
static void sym_update_trans(hcb_p np, struct sym_trans *tip,
struct ccb_trans_settings *cts)
{
SYM_LOCK_ASSERT(MA_OWNED);
/*
* Update the infos.
*/
#define cts__spi (&cts->xport_specific.spi)
if ((cts__spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0)
tip->width = cts__spi->bus_width;
if ((cts__spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0)
tip->offset = cts__spi->sync_offset;
if ((cts__spi->valid & CTS_SPI_VALID_SYNC_RATE) != 0)
tip->period = cts__spi->sync_period;
if ((cts__spi->valid & CTS_SPI_VALID_PPR_OPTIONS) != 0)
tip->options = (cts__spi->ppr_options & PPR_OPT_DT);
if (cts->protocol_version != PROTO_VERSION_UNSPECIFIED &&
cts->protocol_version != PROTO_VERSION_UNKNOWN)
tip->scsi_version = cts->protocol_version;
if (cts->transport_version != XPORT_VERSION_UNSPECIFIED &&
cts->transport_version != XPORT_VERSION_UNKNOWN)
tip->spi_version = cts->transport_version;
#undef cts__spi
/*
* Scale against driver configuration limits.
*/
if (tip->width > SYM_SETUP_MAX_WIDE) tip->width = SYM_SETUP_MAX_WIDE;
if (tip->period && tip->offset) {
if (tip->offset > SYM_SETUP_MAX_OFFS) tip->offset = SYM_SETUP_MAX_OFFS;
if (tip->period < SYM_SETUP_MIN_SYNC) tip->period = SYM_SETUP_MIN_SYNC;
} else {
tip->offset = 0;
tip->period = 0;
}
/*
* Scale against actual controller BUS width.
*/
if (tip->width > np->maxwide)
tip->width = np->maxwide;
/*
* Only accept DT if controller supports and SYNC/WIDE asked.
*/
if (!((np->features & (FE_C10|FE_ULTRA3)) == (FE_C10|FE_ULTRA3)) ||
!(tip->width == BUS_16_BIT && tip->offset)) {
tip->options &= ~PPR_OPT_DT;
}
/*
* Scale period factor and offset against controller limits.
*/
if (tip->offset && tip->period) {
if (tip->options & PPR_OPT_DT) {
if (tip->period < np->minsync_dt)
tip->period = np->minsync_dt;
if (tip->period > np->maxsync_dt)
tip->period = np->maxsync_dt;
if (tip->offset > np->maxoffs_dt)
tip->offset = np->maxoffs_dt;
}
else {
if (tip->period < np->minsync)
tip->period = np->minsync;
if (tip->period > np->maxsync)
tip->period = np->maxsync;
if (tip->offset > np->maxoffs)
tip->offset = np->maxoffs;
}
}
}
/*
* Update flags for a device (logical unit).
*/
static void
sym_update_dflags(hcb_p np, u_char *flags, struct ccb_trans_settings *cts)
{
SYM_LOCK_ASSERT(MA_OWNED);
#define cts__scsi (&cts->proto_specific.scsi)
#define cts__spi (&cts->xport_specific.spi)
if ((cts__spi->valid & CTS_SPI_VALID_DISC) != 0) {
if ((cts__spi->flags & CTS_SPI_FLAGS_DISC_ENB) != 0)
*flags |= SYM_DISC_ENABLED;
else
*flags &= ~SYM_DISC_ENABLED;
}
if ((cts__scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
if ((cts__scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0)
*flags |= SYM_TAGS_ENABLED;
else
*flags &= ~SYM_TAGS_ENABLED;
}
#undef cts__spi
#undef cts__scsi
}
/*============= DRIVER INITIALISATION ==================*/
static device_method_t sym_pci_methods[] = {
DEVMETHOD(device_probe, sym_pci_probe),
DEVMETHOD(device_attach, sym_pci_attach),
DEVMETHOD_END
};
static driver_t sym_pci_driver = {
"sym",
sym_pci_methods,
1 /* no softc */
};
DRIVER_MODULE(sym, pci, sym_pci_driver, NULL, NULL);
MODULE_DEPEND(sym, cam, 1, 1, 1);
MODULE_DEPEND(sym, pci, 1, 1, 1);
static const struct sym_pci_chip sym_pci_dev_table[] = {
{PCI_ID_SYM53C810, 0x0f, "810", 4, 8, 4, 64,
FE_ERL}
,
#ifdef SYM_DEBUG_GENERIC_SUPPORT
{PCI_ID_SYM53C810, 0xff, "810a", 4, 8, 4, 1,
FE_BOF}
,
#else
{PCI_ID_SYM53C810, 0xff, "810a", 4, 8, 4, 1,
FE_CACHE_SET|FE_LDSTR|FE_PFEN|FE_BOF}
,
#endif
{PCI_ID_SYM53C815, 0xff, "815", 4, 8, 4, 64,
FE_BOF|FE_ERL}
,
{PCI_ID_SYM53C825, 0x0f, "825", 6, 8, 4, 64,
FE_WIDE|FE_BOF|FE_ERL|FE_DIFF}
,
{PCI_ID_SYM53C825, 0xff, "825a", 6, 8, 4, 2,
FE_WIDE|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM|FE_DIFF}
,
{PCI_ID_SYM53C860, 0xff, "860", 4, 8, 5, 1,
FE_ULTRA|FE_CLK80|FE_CACHE_SET|FE_BOF|FE_LDSTR|FE_PFEN}
,
{PCI_ID_SYM53C875, 0x01, "875", 6, 16, 5, 2,
FE_WIDE|FE_ULTRA|FE_CLK80|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
FE_RAM|FE_DIFF}
,
{PCI_ID_SYM53C875, 0xff, "875", 6, 16, 5, 2,
FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
FE_RAM|FE_DIFF}
,
{PCI_ID_SYM53C875_2, 0xff, "875", 6, 16, 5, 2,
FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
FE_RAM|FE_DIFF}
,
{PCI_ID_SYM53C885, 0xff, "885", 6, 16, 5, 2,
FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE0_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
FE_RAM|FE_DIFF}
,
#ifdef SYM_DEBUG_GENERIC_SUPPORT
{PCI_ID_SYM53C895, 0xff, "895", 6, 31, 7, 2,
FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|
FE_RAM|FE_LCKFRQ}
,
#else
{PCI_ID_SYM53C895, 0xff, "895", 6, 31, 7, 2,
FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
FE_RAM|FE_LCKFRQ}
,
#endif
{PCI_ID_SYM53C896, 0xff, "896", 6, 31, 7, 4,
FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_LCKFRQ}
,
{PCI_ID_SYM53C895A, 0xff, "895a", 6, 31, 7, 4,
FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
FE_RAM|FE_RAM8K|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_LCKFRQ}
,
{PCI_ID_LSI53C1010, 0x00, "1010-33", 6, 31, 7, 8,
FE_WIDE|FE_ULTRA3|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFBC|FE_LDSTR|FE_PFEN|
FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_CRC|
FE_C10}
,
{PCI_ID_LSI53C1010, 0xff, "1010-33", 6, 31, 7, 8,
FE_WIDE|FE_ULTRA3|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFBC|FE_LDSTR|FE_PFEN|
FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_CRC|
FE_C10|FE_U3EN}
,
{PCI_ID_LSI53C1010_2, 0xff, "1010-66", 6, 31, 7, 8,
FE_WIDE|FE_ULTRA3|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFBC|FE_LDSTR|FE_PFEN|
FE_RAM|FE_RAM8K|FE_64BIT|FE_DAC|FE_IO256|FE_NOPM|FE_LEDC|FE_66MHZ|FE_CRC|
FE_C10|FE_U3EN}
,
{PCI_ID_LSI53C1510D, 0xff, "1510d", 6, 31, 7, 4,
FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_BOF|FE_DFS|FE_LDSTR|FE_PFEN|
FE_RAM|FE_IO256|FE_LEDC}
};
/*
* Look up the chip table.
*
* Return a pointer to the chip entry if found,
* zero otherwise.
*/
static const struct sym_pci_chip *
sym_find_pci_chip(device_t dev)
{
const struct sym_pci_chip *chip;
int i;
u_short device_id;
u_char revision;
if (pci_get_vendor(dev) != PCI_VENDOR_NCR)
return NULL;
device_id = pci_get_device(dev);
revision = pci_get_revid(dev);
for (i = 0; i < nitems(sym_pci_dev_table); i++) {
chip = &sym_pci_dev_table[i];
if (device_id != chip->device_id)
continue;
if (revision > chip->revision_id)
continue;
return chip;
}
return NULL;
}
/*
* Tell upper layer if the chip is supported.
*/
static int
sym_pci_probe(device_t dev)
{
const struct sym_pci_chip *chip;
chip = sym_find_pci_chip(dev);
if (chip && sym_find_firmware(chip)) {
device_set_desc(dev, chip->name);
return BUS_PROBE_DEFAULT;
}
return ENXIO;
}
/*
* Attach a sym53c8xx device.
*/
static int
sym_pci_attach(device_t dev)
{
const struct sym_pci_chip *chip;
u_short command;
u_char cachelnsz;
struct sym_hcb *np = NULL;
struct sym_nvram nvram;
const struct sym_fw *fw = NULL;
int i;
bus_dma_tag_t bus_dmat;
bus_dmat = bus_get_dma_tag(dev);
/*
* Only probed devices should be attached.
* We just enjoy being paranoid. :)
*/
chip = sym_find_pci_chip(dev);
if (chip == NULL || (fw = sym_find_firmware(chip)) == NULL)
return (ENXIO);
/*
* Allocate immediately the host control block,
* since we are only expecting to succeed. :)
* We keep track in the HCB of all the resources that
* are to be released on error.
*/
np = __sym_calloc_dma(bus_dmat, sizeof(*np), "HCB");
if (np)
np->bus_dmat = bus_dmat;
else
return (ENXIO);
device_set_softc(dev, np);
SYM_LOCK_INIT();
/*
* Copy some useful infos to the HCB.
*/
np->hcb_ba = vtobus(np);
np->verbose = bootverbose;
np->device = dev;
np->device_id = pci_get_device(dev);
np->revision_id = pci_get_revid(dev);
np->features = chip->features;
np->clock_divn = chip->nr_divisor;
np->maxoffs = chip->offset_max;
np->maxburst = chip->burst_max;
np->scripta_sz = fw->a_size;
np->scriptb_sz = fw->b_size;
np->fw_setup = fw->setup;
np->fw_patch = fw->patch;
np->fw_name = fw->name;
#ifdef __amd64__
np->target = sym_calloc_dma(SYM_CONF_MAX_TARGET * sizeof(*(np->target)),
"TARGET");
if (!np->target)
goto attach_failed;
#endif
/*
* Initialize the CCB free and busy queues.
*/
sym_que_init(&np->free_ccbq);
sym_que_init(&np->busy_ccbq);
sym_que_init(&np->comp_ccbq);
sym_que_init(&np->cam_ccbq);
/*
* Allocate a tag for the DMA of user data.
*/
if (bus_dma_tag_create(np->bus_dmat, 1, SYM_CONF_DMA_BOUNDARY,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
BUS_SPACE_MAXSIZE_32BIT, SYM_CONF_MAX_SG, SYM_CONF_DMA_BOUNDARY,
0, busdma_lock_mutex, &np->mtx, &np->data_dmat)) {
device_printf(dev, "failed to create DMA tag.\n");
goto attach_failed;
}
/*
* Read and apply some fix-ups to the PCI COMMAND
* register. We want the chip to be enabled for:
* - BUS mastering
* - PCI parity checking (reporting would also be fine)
* - Write And Invalidate.
*/
command = pci_read_config(dev, PCIR_COMMAND, 2);
command |= PCIM_CMD_BUSMASTEREN | PCIM_CMD_PERRESPEN |
PCIM_CMD_MWRICEN;
pci_write_config(dev, PCIR_COMMAND, command, 2);
/*
* Let the device know about the cache line size,
* if it doesn't yet.
*/
cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
if (!cachelnsz) {
cachelnsz = 8;
pci_write_config(dev, PCIR_CACHELNSZ, cachelnsz, 1);
}
/*
* Alloc/get/map/retrieve everything that deals with MMIO.
*/
i = SYM_PCI_MMIO;
np->mmio_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i,
RF_ACTIVE);
if (!np->mmio_res) {
device_printf(dev, "failed to allocate MMIO resources\n");
goto attach_failed;
}
np->mmio_ba = rman_get_start(np->mmio_res);
/*
* Allocate the IRQ.
*/
i = 0;
np->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i,
RF_ACTIVE | RF_SHAREABLE);
if (!np->irq_res) {
device_printf(dev, "failed to allocate IRQ resource\n");
goto attach_failed;
}
#ifdef SYM_CONF_IOMAPPED
/*
* User want us to use normal IO with PCI.
* Alloc/get/map/retrieve everything that deals with IO.
*/
i = SYM_PCI_IO;
np->io_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &i, RF_ACTIVE);
if (!np->io_res) {
device_printf(dev, "failed to allocate IO resources\n");
goto attach_failed;
}
#endif /* SYM_CONF_IOMAPPED */
/*
* If the chip has RAM.
* Alloc/get/map/retrieve the corresponding resources.
*/
if (np->features & (FE_RAM|FE_RAM8K)) {
int regs_id = SYM_PCI_RAM;
if (np->features & FE_64BIT)
regs_id = SYM_PCI_RAM64;
np->ram_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&regs_id, RF_ACTIVE);
if (!np->ram_res) {
device_printf(dev,"failed to allocate RAM resources\n");
goto attach_failed;
}
np->ram_id = regs_id;
np->ram_ba = rman_get_start(np->ram_res);
}
/*
* Save setting of some IO registers, so we will
* be able to probe specific implementations.
*/
sym_save_initial_setting (np);
/*
* Reset the chip now, since it has been reported
* that SCSI clock calibration may not work properly
* if the chip is currently active.
*/
sym_chip_reset (np);
/*
* Try to read the user set-up.
*/
(void) sym_read_nvram(np, &nvram);
/*
* Prepare controller and devices settings, according
* to chip features, user set-up and driver set-up.
*/
(void) sym_prepare_setting(np, &nvram);
/*
* Check the PCI clock frequency.
* Must be performed after prepare_setting since it destroys
* STEST1 that is used to probe for the clock doubler.
*/
i = sym_getpciclock(np);
if (i > 37000)
device_printf(dev, "PCI BUS clock seems too high: %u KHz.\n",i);
/*
* Allocate the start queue.
*/
np->squeue = (u32 *) sym_calloc_dma(sizeof(u32)*(MAX_QUEUE*2),"SQUEUE");
if (!np->squeue)
goto attach_failed;
np->squeue_ba = vtobus(np->squeue);
/*
* Allocate the done queue.
*/
np->dqueue = (u32 *) sym_calloc_dma(sizeof(u32)*(MAX_QUEUE*2),"DQUEUE");
if (!np->dqueue)
goto attach_failed;
np->dqueue_ba = vtobus(np->dqueue);
/*
* Allocate the target bus address array.
*/
np->targtbl = (u32 *) sym_calloc_dma(256, "TARGTBL");
if (!np->targtbl)
goto attach_failed;
np->targtbl_ba = vtobus(np->targtbl);
/*
* Allocate SCRIPTS areas.
*/
np->scripta0 = sym_calloc_dma(np->scripta_sz, "SCRIPTA0");
np->scriptb0 = sym_calloc_dma(np->scriptb_sz, "SCRIPTB0");
if (!np->scripta0 || !np->scriptb0)
goto attach_failed;
/*
* Allocate the CCBs. We need at least ONE.
*/
for (i = 0; sym_alloc_ccb(np) != NULL; i++)
;
if (i < 1)
goto attach_failed;
/*
* Calculate BUS addresses where we are going
* to load the SCRIPTS.
*/
np->scripta_ba = vtobus(np->scripta0);
np->scriptb_ba = vtobus(np->scriptb0);
np->scriptb0_ba = np->scriptb_ba;
if (np->ram_ba) {
np->scripta_ba = np->ram_ba;
if (np->features & FE_RAM8K) {
np->ram_ws = 8192;
np->scriptb_ba = np->scripta_ba + 4096;
#ifdef __LP64__
np->scr_ram_seg = cpu_to_scr(np->scripta_ba >> 32);
#endif
}
else
np->ram_ws = 4096;
}
/*
* Copy scripts to controller instance.
*/
bcopy(fw->a_base, np->scripta0, np->scripta_sz);
bcopy(fw->b_base, np->scriptb0, np->scriptb_sz);
/*
* Setup variable parts in scripts and compute
* scripts bus addresses used from the C code.
*/
np->fw_setup(np, fw);
/*
* Bind SCRIPTS with physical addresses usable by the
* SCRIPTS processor (as seen from the BUS = BUS addresses).
*/
sym_fw_bind_script(np, (u32 *) np->scripta0, np->scripta_sz);
sym_fw_bind_script(np, (u32 *) np->scriptb0, np->scriptb_sz);
#ifdef SYM_CONF_IARB_SUPPORT
/*
* If user wants IARB to be set when we win arbitration
* and have other jobs, compute the max number of consecutive
* settings of IARB hints before we leave devices a chance to
* arbitrate for reselection.
*/
#ifdef SYM_SETUP_IARB_MAX
np->iarb_max = SYM_SETUP_IARB_MAX;
#else
np->iarb_max = 4;
#endif
#endif
/*
* Prepare the idle and invalid task actions.
*/
np->idletask.start = cpu_to_scr(SCRIPTA_BA (np, idle));
np->idletask.restart = cpu_to_scr(SCRIPTB_BA (np, bad_i_t_l));
np->idletask_ba = vtobus(&np->idletask);
np->notask.start = cpu_to_scr(SCRIPTA_BA (np, idle));
np->notask.restart = cpu_to_scr(SCRIPTB_BA (np, bad_i_t_l));
np->notask_ba = vtobus(&np->notask);
np->bad_itl.start = cpu_to_scr(SCRIPTA_BA (np, idle));
np->bad_itl.restart = cpu_to_scr(SCRIPTB_BA (np, bad_i_t_l));
np->bad_itl_ba = vtobus(&np->bad_itl);
np->bad_itlq.start = cpu_to_scr(SCRIPTA_BA (np, idle));
np->bad_itlq.restart = cpu_to_scr(SCRIPTB_BA (np,bad_i_t_l_q));
np->bad_itlq_ba = vtobus(&np->bad_itlq);
/*
* Allocate and prepare the lun JUMP table that is used
* for a target prior the probing of devices (bad lun table).
* A private table will be allocated for the target on the
* first INQUIRY response received.
*/
np->badluntbl = sym_calloc_dma(256, "BADLUNTBL");
if (!np->badluntbl)
goto attach_failed;
np->badlun_sa = cpu_to_scr(SCRIPTB_BA (np, resel_bad_lun));
for (i = 0 ; i < 64 ; i++) /* 64 luns/target, no less */
np->badluntbl[i] = cpu_to_scr(vtobus(&np->badlun_sa));
/*
* Prepare the bus address array that contains the bus
* address of each target control block.
* For now, assume all logical units are wrong. :)
*/
for (i = 0 ; i < SYM_CONF_MAX_TARGET ; i++) {
np->targtbl[i] = cpu_to_scr(vtobus(&np->target[i]));
np->target[i].head.luntbl_sa =
cpu_to_scr(vtobus(np->badluntbl));
np->target[i].head.lun0_sa =
cpu_to_scr(vtobus(&np->badlun_sa));
}
/*
* Now check the cache handling of the pci chipset.
*/
if (sym_snooptest (np)) {
device_printf(dev, "CACHE INCORRECTLY CONFIGURED.\n");
goto attach_failed;
}
/*
* Now deal with CAM.
* Hopefully, we will succeed with that one.:)
*/
if (!sym_cam_attach(np))
goto attach_failed;
/*
* Sigh! we are done.
*/
return 0;
/*
* We have failed.
* We will try to free all the resources we have
* allocated, but if we are a boot device, this
* will not help that much.;)
*/
attach_failed:
if (np)
sym_pci_free(np);
return ENXIO;
}
/*
* Free everything that have been allocated for this device.
*/
static void sym_pci_free(hcb_p np)
{
SYM_QUEHEAD *qp;
ccb_p cp;
tcb_p tp;
lcb_p lp;
int target, lun;
/*
* First free CAM resources.
*/
sym_cam_free(np);
/*
* Now every should be quiet for us to
* free other resources.
*/
if (np->ram_res)
bus_release_resource(np->device, SYS_RES_MEMORY,
np->ram_id, np->ram_res);
if (np->mmio_res)
bus_release_resource(np->device, SYS_RES_MEMORY,
SYM_PCI_MMIO, np->mmio_res);
if (np->io_res)
bus_release_resource(np->device, SYS_RES_IOPORT,
SYM_PCI_IO, np->io_res);
if (np->irq_res)
bus_release_resource(np->device, SYS_RES_IRQ,
0, np->irq_res);
if (np->scriptb0)
sym_mfree_dma(np->scriptb0, np->scriptb_sz, "SCRIPTB0");
if (np->scripta0)
sym_mfree_dma(np->scripta0, np->scripta_sz, "SCRIPTA0");
if (np->squeue)
sym_mfree_dma(np->squeue, sizeof(u32)*(MAX_QUEUE*2), "SQUEUE");
if (np->dqueue)
sym_mfree_dma(np->dqueue, sizeof(u32)*(MAX_QUEUE*2), "DQUEUE");
while ((qp = sym_remque_head(&np->free_ccbq)) != NULL) {
cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
bus_dmamap_destroy(np->data_dmat, cp->dmamap);
sym_mfree_dma(cp->sns_bbuf, SYM_SNS_BBUF_LEN, "SNS_BBUF");
sym_mfree_dma(cp, sizeof(*cp), "CCB");
}
if (np->badluntbl)
sym_mfree_dma(np->badluntbl, 256,"BADLUNTBL");
for (target = 0; target < SYM_CONF_MAX_TARGET ; target++) {
tp = &np->target[target];
for (lun = 0 ; lun < SYM_CONF_MAX_LUN ; lun++) {
lp = sym_lp(tp, lun);
if (!lp)
continue;
if (lp->itlq_tbl)
sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK*4,
"ITLQ_TBL");
if (lp->cb_tags)
sym_mfree(lp->cb_tags, SYM_CONF_MAX_TASK,
"CB_TAGS");
sym_mfree_dma(lp, sizeof(*lp), "LCB");
}
#if SYM_CONF_MAX_LUN > 1
if (tp->lunmp)
sym_mfree(tp->lunmp, SYM_CONF_MAX_LUN*sizeof(lcb_p),
"LUNMP");
#endif
}
#ifdef __amd64__
if (np->target)
sym_mfree_dma(np->target,
SYM_CONF_MAX_TARGET * sizeof(*(np->target)), "TARGET");
#endif
if (np->targtbl)
sym_mfree_dma(np->targtbl, 256, "TARGTBL");
if (np->data_dmat)
bus_dma_tag_destroy(np->data_dmat);
if (SYM_LOCK_INITIALIZED() != 0)
SYM_LOCK_DESTROY();
device_set_softc(np->device, NULL);
sym_mfree_dma(np, sizeof(*np), "HCB");
}
/*
* Allocate CAM resources and register a bus to CAM.
*/
static int sym_cam_attach(hcb_p np)
{
struct cam_devq *devq = NULL;
struct cam_sim *sim = NULL;
struct cam_path *path = NULL;
int err;
/*
* Establish our interrupt handler.
*/
err = bus_setup_intr(np->device, np->irq_res,
INTR_ENTROPY | INTR_MPSAFE | INTR_TYPE_CAM,
NULL, sym_intr, np, &np->intr);
if (err) {
device_printf(np->device, "bus_setup_intr() failed: %d\n",
err);
goto fail;
}
/*
* Create the device queue for our sym SIM.
*/
devq = cam_simq_alloc(SYM_CONF_MAX_START);
if (!devq)
goto fail;
/*
* Construct our SIM entry.
*/
sim = cam_sim_alloc(sym_action, sym_poll, "sym", np,
device_get_unit(np->device),
&np->mtx, 1, SYM_SETUP_MAX_TAG, devq);
if (!sim)
goto fail;
SYM_LOCK();
if (xpt_bus_register(sim, np->device, 0) != CAM_SUCCESS)
goto fail;
np->sim = sim;
sim = NULL;
if (xpt_create_path(&path, NULL,
cam_sim_path(np->sim), CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
goto fail;
}
np->path = path;
/*
* Establish our async notification handler.
*/
if (xpt_register_async(AC_LOST_DEVICE, sym_async, np->sim, path) !=
CAM_REQ_CMP)
goto fail;
/*
* Start the chip now, without resetting the BUS, since
* it seems that this must stay under control of CAM.
* With LVD/SE capable chips and BUS in SE mode, we may
* get a spurious SMBC interrupt.
*/
sym_init (np, 0);
SYM_UNLOCK();
return 1;
fail:
if (sim)
cam_sim_free(sim, FALSE);
if (devq)
cam_simq_free(devq);
SYM_UNLOCK();
sym_cam_free(np);
return 0;
}
/*
* Free everything that deals with CAM.
*/
static void sym_cam_free(hcb_p np)
{
SYM_LOCK_ASSERT(MA_NOTOWNED);
if (np->intr) {
bus_teardown_intr(np->device, np->irq_res, np->intr);
np->intr = NULL;
}
SYM_LOCK();
if (np->sim) {
xpt_bus_deregister(cam_sim_path(np->sim));
cam_sim_free(np->sim, /*free_devq*/ TRUE);
np->sim = NULL;
}
if (np->path) {
xpt_free_path(np->path);
np->path = NULL;
}
SYM_UNLOCK();
}
/*============ OPTIONNAL NVRAM SUPPORT =================*/
/*
* Get host setup from NVRAM.
*/
static void sym_nvram_setup_host (hcb_p np, struct sym_nvram *nvram)
{
#ifdef SYM_CONF_NVRAM_SUPPORT
/*
* Get parity checking, host ID, verbose mode
* and miscellaneous host flags from NVRAM.
*/
switch(nvram->type) {
case SYM_SYMBIOS_NVRAM:
if (!(nvram->data.Symbios.flags & SYMBIOS_PARITY_ENABLE))
np->rv_scntl0 &= ~0x0a;
np->myaddr = nvram->data.Symbios.host_id & 0x0f;
if (nvram->data.Symbios.flags & SYMBIOS_VERBOSE_MSGS)
np->verbose += 1;
if (nvram->data.Symbios.flags1 & SYMBIOS_SCAN_HI_LO)
np->usrflags |= SYM_SCAN_TARGETS_HILO;
if (nvram->data.Symbios.flags2 & SYMBIOS_AVOID_BUS_RESET)
np->usrflags |= SYM_AVOID_BUS_RESET;
break;
case SYM_TEKRAM_NVRAM:
np->myaddr = nvram->data.Tekram.host_id & 0x0f;
break;
default:
break;
}
#endif
}
/*
* Get target setup from NVRAM.
*/
#ifdef SYM_CONF_NVRAM_SUPPORT
static void sym_Symbios_setup_target(hcb_p np,int target, Symbios_nvram *nvram);
static void sym_Tekram_setup_target(hcb_p np,int target, Tekram_nvram *nvram);
#endif
static void
sym_nvram_setup_target (hcb_p np, int target, struct sym_nvram *nvp)
{
#ifdef SYM_CONF_NVRAM_SUPPORT
switch(nvp->type) {
case SYM_SYMBIOS_NVRAM:
sym_Symbios_setup_target (np, target, &nvp->data.Symbios);
break;
case SYM_TEKRAM_NVRAM:
sym_Tekram_setup_target (np, target, &nvp->data.Tekram);
break;
default:
break;
}
#endif
}
#ifdef SYM_CONF_NVRAM_SUPPORT
/*
* Get target set-up from Symbios format NVRAM.
*/
static void
sym_Symbios_setup_target(hcb_p np, int target, Symbios_nvram *nvram)
{
tcb_p tp = &np->target[target];
Symbios_target *tn = &nvram->target[target];
tp->tinfo.user.period = tn->sync_period ? (tn->sync_period + 3) / 4 : 0;
tp->tinfo.user.width = tn->bus_width == 0x10 ? BUS_16_BIT : BUS_8_BIT;
tp->usrtags =
(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? SYM_SETUP_MAX_TAG : 0;
if (!(tn->flags & SYMBIOS_DISCONNECT_ENABLE))
tp->usrflags &= ~SYM_DISC_ENABLED;
if (!(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME))
tp->usrflags |= SYM_SCAN_BOOT_DISABLED;
if (!(tn->flags & SYMBIOS_SCAN_LUNS))
tp->usrflags |= SYM_SCAN_LUNS_DISABLED;
}
/*
* Get target set-up from Tekram format NVRAM.
*/
static void
sym_Tekram_setup_target(hcb_p np, int target, Tekram_nvram *nvram)
{
tcb_p tp = &np->target[target];
struct Tekram_target *tn = &nvram->target[target];
int i;
if (tn->flags & TEKRAM_SYNC_NEGO) {
i = tn->sync_index & 0xf;
tp->tinfo.user.period = Tekram_sync[i];
}
tp->tinfo.user.width =
(tn->flags & TEKRAM_WIDE_NEGO) ? BUS_16_BIT : BUS_8_BIT;
if (tn->flags & TEKRAM_TAGGED_COMMANDS) {
tp->usrtags = 2 << nvram->max_tags_index;
}
if (tn->flags & TEKRAM_DISCONNECT_ENABLE)
tp->usrflags |= SYM_DISC_ENABLED;
/* If any device does not support parity, we will not use this option */
if (!(tn->flags & TEKRAM_PARITY_CHECK))
np->rv_scntl0 &= ~0x0a; /* SCSI parity checking disabled */
}
#ifdef SYM_CONF_DEBUG_NVRAM
/*
* Dump Symbios format NVRAM for debugging purpose.
*/
static void sym_display_Symbios_nvram(hcb_p np, Symbios_nvram *nvram)
{
int i;
/* display Symbios nvram host data */
printf("%s: HOST ID=%d%s%s%s%s%s%s\n",
sym_name(np), nvram->host_id & 0x0f,
(nvram->flags & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"",
(nvram->flags & SYMBIOS_PARITY_ENABLE) ? " PARITY" :"",
(nvram->flags & SYMBIOS_VERBOSE_MSGS) ? " VERBOSE" :"",
(nvram->flags & SYMBIOS_CHS_MAPPING) ? " CHS_ALT" :"",
(nvram->flags2 & SYMBIOS_AVOID_BUS_RESET)?" NO_RESET" :"",
(nvram->flags1 & SYMBIOS_SCAN_HI_LO) ? " HI_LO" :"");
/* display Symbios nvram drive data */
for (i = 0 ; i < 15 ; i++) {
struct Symbios_target *tn = &nvram->target[i];
printf("%s-%d:%s%s%s%s WIDTH=%d SYNC=%d TMO=%d\n",
sym_name(np), i,
(tn->flags & SYMBIOS_DISCONNECT_ENABLE) ? " DISC" : "",
(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME) ? " SCAN_BOOT" : "",
(tn->flags & SYMBIOS_SCAN_LUNS) ? " SCAN_LUNS" : "",
(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? " TCQ" : "",
tn->bus_width,
tn->sync_period / 4,
tn->timeout);
}
}
/*
* Dump TEKRAM format NVRAM for debugging purpose.
*/
static const u_char Tekram_boot_delay[7] = {3, 5, 10, 20, 30, 60, 120};
static void sym_display_Tekram_nvram(hcb_p np, Tekram_nvram *nvram)
{
int i, tags, boot_delay;
char *rem;
/* display Tekram nvram host data */
tags = 2 << nvram->max_tags_index;
boot_delay = 0;
if (nvram->boot_delay_index < 6)
boot_delay = Tekram_boot_delay[nvram->boot_delay_index];
switch((nvram->flags & TEKRAM_REMOVABLE_FLAGS) >> 6) {
default:
case 0: rem = ""; break;
case 1: rem = " REMOVABLE=boot device"; break;
case 2: rem = " REMOVABLE=all"; break;
}
printf("%s: HOST ID=%d%s%s%s%s%s%s%s%s%s BOOT DELAY=%d tags=%d\n",
sym_name(np), nvram->host_id & 0x0f,
(nvram->flags1 & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"",
(nvram->flags & TEKRAM_MORE_THAN_2_DRIVES) ? " >2DRIVES" :"",
(nvram->flags & TEKRAM_DRIVES_SUP_1GB) ? " >1GB" :"",
(nvram->flags & TEKRAM_RESET_ON_POWER_ON) ? " RESET" :"",
(nvram->flags & TEKRAM_ACTIVE_NEGATION) ? " ACT_NEG" :"",
(nvram->flags & TEKRAM_IMMEDIATE_SEEK) ? " IMM_SEEK" :"",
(nvram->flags & TEKRAM_SCAN_LUNS) ? " SCAN_LUNS" :"",
(nvram->flags1 & TEKRAM_F2_F6_ENABLED) ? " F2_F6" :"",
rem, boot_delay, tags);
/* display Tekram nvram drive data */
for (i = 0; i <= 15; i++) {
int sync, j;
struct Tekram_target *tn = &nvram->target[i];
j = tn->sync_index & 0xf;
sync = Tekram_sync[j];
printf("%s-%d:%s%s%s%s%s%s PERIOD=%d\n",
sym_name(np), i,
(tn->flags & TEKRAM_PARITY_CHECK) ? " PARITY" : "",
(tn->flags & TEKRAM_SYNC_NEGO) ? " SYNC" : "",
(tn->flags & TEKRAM_DISCONNECT_ENABLE) ? " DISC" : "",
(tn->flags & TEKRAM_START_CMD) ? " START" : "",
(tn->flags & TEKRAM_TAGGED_COMMANDS) ? " TCQ" : "",
(tn->flags & TEKRAM_WIDE_NEGO) ? " WIDE" : "",
sync);
}
}
#endif /* SYM_CONF_DEBUG_NVRAM */
#endif /* SYM_CONF_NVRAM_SUPPORT */
/*
* Try reading Symbios or Tekram NVRAM
*/
#ifdef SYM_CONF_NVRAM_SUPPORT
static int sym_read_Symbios_nvram (hcb_p np, Symbios_nvram *nvram);
static int sym_read_Tekram_nvram (hcb_p np, Tekram_nvram *nvram);
#endif
static int sym_read_nvram(hcb_p np, struct sym_nvram *nvp)
{
#ifdef SYM_CONF_NVRAM_SUPPORT
/*
* Try to read SYMBIOS nvram.
* Try to read TEKRAM nvram if Symbios nvram not found.
*/
if (SYM_SETUP_SYMBIOS_NVRAM &&
!sym_read_Symbios_nvram (np, &nvp->data.Symbios)) {
nvp->type = SYM_SYMBIOS_NVRAM;
#ifdef SYM_CONF_DEBUG_NVRAM
sym_display_Symbios_nvram(np, &nvp->data.Symbios);
#endif
}
else if (SYM_SETUP_TEKRAM_NVRAM &&
!sym_read_Tekram_nvram (np, &nvp->data.Tekram)) {
nvp->type = SYM_TEKRAM_NVRAM;
#ifdef SYM_CONF_DEBUG_NVRAM
sym_display_Tekram_nvram(np, &nvp->data.Tekram);
#endif
}
else
nvp->type = 0;
#else
nvp->type = 0;
#endif
return nvp->type;
}
#ifdef SYM_CONF_NVRAM_SUPPORT
/*
* 24C16 EEPROM reading.
*
* GPOI0 - data in/data out
* GPIO1 - clock
* Symbios NVRAM wiring now also used by Tekram.
*/
#define SET_BIT 0
#define CLR_BIT 1
#define SET_CLK 2
#define CLR_CLK 3
/*
* Set/clear data/clock bit in GPIO0
*/
static void S24C16_set_bit(hcb_p np, u_char write_bit, u_char *gpreg,
int bit_mode)
{
UDELAY (5);
switch (bit_mode){
case SET_BIT:
*gpreg |= write_bit;
break;
case CLR_BIT:
*gpreg &= 0xfe;
break;
case SET_CLK:
*gpreg |= 0x02;
break;
case CLR_CLK:
*gpreg &= 0xfd;
break;
}
OUTB (nc_gpreg, *gpreg);
UDELAY (5);
}
/*
* Send START condition to NVRAM to wake it up.
*/
static void S24C16_start(hcb_p np, u_char *gpreg)
{
S24C16_set_bit(np, 1, gpreg, SET_BIT);
S24C16_set_bit(np, 0, gpreg, SET_CLK);
S24C16_set_bit(np, 0, gpreg, CLR_BIT);
S24C16_set_bit(np, 0, gpreg, CLR_CLK);
}
/*
* Send STOP condition to NVRAM - puts NVRAM to sleep... ZZzzzz!!
*/
static void S24C16_stop(hcb_p np, u_char *gpreg)
{
S24C16_set_bit(np, 0, gpreg, SET_CLK);
S24C16_set_bit(np, 1, gpreg, SET_BIT);
}
/*
* Read or write a bit to the NVRAM,
* read if GPIO0 input else write if GPIO0 output
*/
static void S24C16_do_bit(hcb_p np, u_char *read_bit, u_char write_bit,
u_char *gpreg)
{
S24C16_set_bit(np, write_bit, gpreg, SET_BIT);
S24C16_set_bit(np, 0, gpreg, SET_CLK);
if (read_bit)
*read_bit = INB (nc_gpreg);
S24C16_set_bit(np, 0, gpreg, CLR_CLK);
S24C16_set_bit(np, 0, gpreg, CLR_BIT);
}
/*
* Output an ACK to the NVRAM after reading,
* change GPIO0 to output and when done back to an input
*/
static void S24C16_write_ack(hcb_p np, u_char write_bit, u_char *gpreg,
u_char *gpcntl)
{
OUTB (nc_gpcntl, *gpcntl & 0xfe);
S24C16_do_bit(np, 0, write_bit, gpreg);
OUTB (nc_gpcntl, *gpcntl);
}
/*
* Input an ACK from NVRAM after writing,
* change GPIO0 to input and when done back to an output
*/
static void S24C16_read_ack(hcb_p np, u_char *read_bit, u_char *gpreg,
u_char *gpcntl)
{
OUTB (nc_gpcntl, *gpcntl | 0x01);
S24C16_do_bit(np, read_bit, 1, gpreg);
OUTB (nc_gpcntl, *gpcntl);
}
/*
* WRITE a byte to the NVRAM and then get an ACK to see it was accepted OK,
* GPIO0 must already be set as an output
*/
static void S24C16_write_byte(hcb_p np, u_char *ack_data, u_char write_data,
u_char *gpreg, u_char *gpcntl)
{
int x;
for (x = 0; x < 8; x++)
S24C16_do_bit(np, 0, (write_data >> (7 - x)) & 0x01, gpreg);
S24C16_read_ack(np, ack_data, gpreg, gpcntl);
}
/*
* READ a byte from the NVRAM and then send an ACK to say we have got it,
* GPIO0 must already be set as an input
*/
static void S24C16_read_byte(hcb_p np, u_char *read_data, u_char ack_data,
u_char *gpreg, u_char *gpcntl)
{
int x;
u_char read_bit;
*read_data = 0;
for (x = 0; x < 8; x++) {
S24C16_do_bit(np, &read_bit, 1, gpreg);
*read_data |= ((read_bit & 0x01) << (7 - x));
}
S24C16_write_ack(np, ack_data, gpreg, gpcntl);
}
/*
* Read 'len' bytes starting at 'offset'.
*/
static int sym_read_S24C16_nvram (hcb_p np, int offset, u_char *data, int len)
{
u_char gpcntl, gpreg;
u_char old_gpcntl, old_gpreg;
u_char ack_data;
int retv = 1;
int x;
/* save current state of GPCNTL and GPREG */
old_gpreg = INB (nc_gpreg);
old_gpcntl = INB (nc_gpcntl);
gpcntl = old_gpcntl & 0x1c;
/* set up GPREG & GPCNTL to set GPIO0 and GPIO1 in to known state */
OUTB (nc_gpreg, old_gpreg);
OUTB (nc_gpcntl, gpcntl);
/* this is to set NVRAM into a known state with GPIO0/1 both low */
gpreg = old_gpreg;
S24C16_set_bit(np, 0, &gpreg, CLR_CLK);
S24C16_set_bit(np, 0, &gpreg, CLR_BIT);
/* now set NVRAM inactive with GPIO0/1 both high */
S24C16_stop(np, &gpreg);
/* activate NVRAM */
S24C16_start(np, &gpreg);
/* write device code and random address MSB */
S24C16_write_byte(np, &ack_data,
0xa0 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl);
if (ack_data & 0x01)
goto out;
/* write random address LSB */
S24C16_write_byte(np, &ack_data,
offset & 0xff, &gpreg, &gpcntl);
if (ack_data & 0x01)
goto out;
/* regenerate START state to set up for reading */
S24C16_start(np, &gpreg);
/* rewrite device code and address MSB with read bit set (lsb = 0x01) */
S24C16_write_byte(np, &ack_data,
0xa1 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl);
if (ack_data & 0x01)
goto out;
/* now set up GPIO0 for inputting data */
gpcntl |= 0x01;
OUTB (nc_gpcntl, gpcntl);
/* input all requested data - only part of total NVRAM */
for (x = 0; x < len; x++)
S24C16_read_byte(np, &data[x], (x == (len-1)), &gpreg, &gpcntl);
/* finally put NVRAM back in inactive mode */
gpcntl &= 0xfe;
OUTB (nc_gpcntl, gpcntl);
S24C16_stop(np, &gpreg);
retv = 0;
out:
/* return GPIO0/1 to original states after having accessed NVRAM */
OUTB (nc_gpcntl, old_gpcntl);
OUTB (nc_gpreg, old_gpreg);
return retv;
}
#undef SET_BIT /* 0 */
#undef CLR_BIT /* 1 */
#undef SET_CLK /* 2 */
#undef CLR_CLK /* 3 */
/*
* Try reading Symbios NVRAM.
* Return 0 if OK.
*/
static int sym_read_Symbios_nvram (hcb_p np, Symbios_nvram *nvram)
{
static u_char Symbios_trailer[6] = {0xfe, 0xfe, 0, 0, 0, 0};
u_char *data = (u_char *) nvram;
int len = sizeof(*nvram);
u_short csum;
int x;
/* probe the 24c16 and read the SYMBIOS 24c16 area */
if (sym_read_S24C16_nvram (np, SYMBIOS_NVRAM_ADDRESS, data, len))
return 1;
/* check valid NVRAM signature, verify byte count and checksum */
if (nvram->type != 0 ||
bcmp(nvram->trailer, Symbios_trailer, 6) ||
nvram->byte_count != len - 12)
return 1;
/* verify checksum */
for (x = 6, csum = 0; x < len - 6; x++)
csum += data[x];
if (csum != nvram->checksum)
return 1;
return 0;
}
/*
* 93C46 EEPROM reading.
*
* GPOI0 - data in
* GPIO1 - data out
* GPIO2 - clock
* GPIO4 - chip select
*
* Used by Tekram.
*/
/*
* Pulse clock bit in GPIO0
*/
static void T93C46_Clk(hcb_p np, u_char *gpreg)
{
OUTB (nc_gpreg, *gpreg | 0x04);
UDELAY (2);
OUTB (nc_gpreg, *gpreg);
}
/*
* Read bit from NVRAM
*/
static void T93C46_Read_Bit(hcb_p np, u_char *read_bit, u_char *gpreg)
{
UDELAY (2);
T93C46_Clk(np, gpreg);
*read_bit = INB (nc_gpreg);
}
/*
* Write bit to GPIO0
*/
static void T93C46_Write_Bit(hcb_p np, u_char write_bit, u_char *gpreg)
{
if (write_bit & 0x01)
*gpreg |= 0x02;
else
*gpreg &= 0xfd;
*gpreg |= 0x10;
OUTB (nc_gpreg, *gpreg);
UDELAY (2);
T93C46_Clk(np, gpreg);
}
/*
* Send STOP condition to NVRAM - puts NVRAM to sleep... ZZZzzz!!
*/
static void T93C46_Stop(hcb_p np, u_char *gpreg)
{
*gpreg &= 0xef;
OUTB (nc_gpreg, *gpreg);
UDELAY (2);
T93C46_Clk(np, gpreg);
}
/*
* Send read command and address to NVRAM
*/
static void T93C46_Send_Command(hcb_p np, u_short write_data,
u_char *read_bit, u_char *gpreg)
{
int x;
/* send 9 bits, start bit (1), command (2), address (6) */
for (x = 0; x < 9; x++)
T93C46_Write_Bit(np, (u_char) (write_data >> (8 - x)), gpreg);
*read_bit = INB (nc_gpreg);
}
/*
* READ 2 bytes from the NVRAM
*/
static void T93C46_Read_Word(hcb_p np, u_short *nvram_data, u_char *gpreg)
{
int x;
u_char read_bit;
*nvram_data = 0;
for (x = 0; x < 16; x++) {
T93C46_Read_Bit(np, &read_bit, gpreg);
if (read_bit & 0x01)
*nvram_data |= (0x01 << (15 - x));
else
*nvram_data &= ~(0x01 << (15 - x));
}
}
/*
* Read Tekram NvRAM data.
*/
static int T93C46_Read_Data(hcb_p np, u_short *data,int len,u_char *gpreg)
{
u_char read_bit;
int x;
for (x = 0; x < len; x++) {
/* output read command and address */
T93C46_Send_Command(np, 0x180 | x, &read_bit, gpreg);
if (read_bit & 0x01)
return 1; /* Bad */
T93C46_Read_Word(np, &data[x], gpreg);
T93C46_Stop(np, gpreg);
}
return 0;
}
/*
* Try reading 93C46 Tekram NVRAM.
*/
static int sym_read_T93C46_nvram (hcb_p np, Tekram_nvram *nvram)
{
u_char gpcntl, gpreg;
u_char old_gpcntl, old_gpreg;
int retv = 1;
/* save current state of GPCNTL and GPREG */
old_gpreg = INB (nc_gpreg);
old_gpcntl = INB (nc_gpcntl);
/* set up GPREG & GPCNTL to set GPIO0/1/2/4 in to known state, 0 in,
1/2/4 out */
gpreg = old_gpreg & 0xe9;
OUTB (nc_gpreg, gpreg);
gpcntl = (old_gpcntl & 0xe9) | 0x09;
OUTB (nc_gpcntl, gpcntl);
/* input all of NVRAM, 64 words */
retv = T93C46_Read_Data(np, (u_short *) nvram,
sizeof(*nvram) / sizeof(short), &gpreg);
/* return GPIO0/1/2/4 to original states after having accessed NVRAM */
OUTB (nc_gpcntl, old_gpcntl);
OUTB (nc_gpreg, old_gpreg);
return retv;
}
/*
* Try reading Tekram NVRAM.
* Return 0 if OK.
*/
static int sym_read_Tekram_nvram (hcb_p np, Tekram_nvram *nvram)
{
u_char *data = (u_char *) nvram;
int len = sizeof(*nvram);
u_short csum;
int x;
switch (np->device_id) {
case PCI_ID_SYM53C885:
case PCI_ID_SYM53C895:
case PCI_ID_SYM53C896:
x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS,
data, len);
break;
case PCI_ID_SYM53C875:
x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS,
data, len);
if (!x)
break;
default:
x = sym_read_T93C46_nvram(np, nvram);
break;
}
if (x)
return 1;
/* verify checksum */
for (x = 0, csum = 0; x < len - 1; x += 2)
csum += data[x] + (data[x+1] << 8);
if (csum != 0x1234)
return 1;
return 0;
}
#endif /* SYM_CONF_NVRAM_SUPPORT */
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