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Backed out one of my "performance optimizations" as it results in sometimes

Browse Source 
not resuming the NIC as required for transmit. Thanks to Alan Cox
<alc@cs.rice.edu> for noticing this.
Added another performance optimization to compensate. :-)

Changed crscdt to 1...strange, but this seems to be needed for some reason
despite what the manual says.
This commit is contained in:
David Greenman 1996-09-29 10:20:45 +00:00
parent 36122d2d57
commit 78fb85bbf7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=18553
2 changed files with 26 additions and 18 deletions
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22
sys/dev/fxp/if_fxp.c
View File

@ -24,7 +24,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: if_fxp.c,v 1.18 1996/09/20 11:05:39 davidg Exp $
* $Id: if_fxp.c,v 1.19 1996/09/22 11:48:54 davidg Exp $
*/
/*
@ -418,7 +418,7 @@ fxp_start(ifp)
struct fxp_csr *csr = sc->csr;
struct fxp_cb_tx *txp;
struct mbuf *m, *mb_head;
int segment;
int segment, first = 1;
txloop:
/*
@ -513,15 +513,19 @@ tbdinit:
sc->tx_queued++;
if (csr->scb_cus == FXP_SCB_CUS_SUSPENDED) {
/*
* Only need to wait prior to the first resume command.
*/
if (first) {
first--;
fxp_scb_wait(csr);
/*
* Resume transmission.
*/
csr->scb_command = FXP_SCB_COMMAND_CU_RESUME;
}
/*
* Resume transmission if suspended.
*/
csr->scb_command = FXP_SCB_COMMAND_CU_RESUME;
#if NBPFILTER > 0
/*
* Pass packet to bpf if there is a listener.
@ -869,7 +873,7 @@ fxp_init(ifp)
cbp->interfrm_spacing = 6; /* (96 bits of) interframe spacing */
cbp->promiscuous = prm; /* promiscuous mode */
cbp->bcast_disable = 0; /* (don't) disable broadcasts */
cbp->crscdt = 0; /* (CRS only) */
cbp->crscdt = 1; /* (CRS only) */
cbp->stripping = !prm; /* truncate rx packet to byte count */
cbp->padding = 1; /* (do) pad short tx packets */
cbp->rcv_crc_xfer = 0; /* (don't) xfer CRC to host */

22
sys/pci/if_fxp.c
View File

@ -24,7 +24,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: if_fxp.c,v 1.18 1996/09/20 11:05:39 davidg Exp $
* $Id: if_fxp.c,v 1.19 1996/09/22 11:48:54 davidg Exp $
*/
/*
@ -418,7 +418,7 @@ fxp_start(ifp)
struct fxp_csr *csr = sc->csr;
struct fxp_cb_tx *txp;
struct mbuf *m, *mb_head;
int segment;
int segment, first = 1;
txloop:
/*
@ -513,15 +513,19 @@ tbdinit:
sc->tx_queued++;
if (csr->scb_cus == FXP_SCB_CUS_SUSPENDED) {
/*
* Only need to wait prior to the first resume command.
*/
if (first) {
first--;
fxp_scb_wait(csr);
/*
* Resume transmission.
*/
csr->scb_command = FXP_SCB_COMMAND_CU_RESUME;
}
/*
* Resume transmission if suspended.
*/
csr->scb_command = FXP_SCB_COMMAND_CU_RESUME;
#if NBPFILTER > 0
/*
* Pass packet to bpf if there is a listener.
@ -869,7 +873,7 @@ fxp_init(ifp)
cbp->interfrm_spacing = 6; /* (96 bits of) interframe spacing */
cbp->promiscuous = prm; /* promiscuous mode */
cbp->bcast_disable = 0; /* (don't) disable broadcasts */
cbp->crscdt = 0; /* (CRS only) */
cbp->crscdt = 1; /* (CRS only) */
cbp->stripping = !prm; /* truncate rx packet to byte count */
cbp->padding = 1; /* (do) pad short tx packets */
cbp->rcv_crc_xfer = 0; /* (don't) xfer CRC to host */