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d438b4ef0c
DQO is the descriptor format for our next generation virtual NIC. It is necessary to make full use of the hardware bandwidth on many newer GCP VM shapes. One major change with DQO from its predecessor GQI is that it uses dual descriptor rings for both TX and RX queues. The TX path uses a descriptor ring to send descriptors to HW, and receives packet completion events on a TX completion ring. The RX path posts buffers to HW using an RX descriptor ring and receives incoming packets on an RX completion ring. In GQI-QPL, the hardware could not access arbitrary regions of guest memory, which is why there was a pre-negotitated bounce buffer (QPL: Queue Page List). DQO-RDA has no such limitation. "RDA" is in contrast to QPL and stands for "Raw DMA Addressing" which just means that HW does not need a fixed bounce buffer and can DMA arbitrary regions of guest memory. A subsequent patch will introduce the DQO-QPL datapath that uses the same descriptor format as in this patch, but will have a fixed bounce buffer. Signed-off-by: Shailend Chand <shailend@google.com> Reviewed-by: markj MFC-after: 2 weeks Differential Revision: https://reviews.freebsd.org/D46690
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2023 Google LLC
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _GVE_PLAT_FBSD_H
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#define _GVE_PLAT_FBSD_H
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bitset.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/eventhandler.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/smp.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/taskqueue.h>
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#include <sys/time.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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#include <net/if_vlan_var.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/if_ether.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_lro.h>
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#include <netinet/udp.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_page.h>
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#include <machine/atomic.h>
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#include <machine/bus.h>
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#include <machine/in_cksum.h>
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#include <machine/resource.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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typedef uint16_t __be16;
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typedef uint32_t __be32;
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typedef uint64_t __be64;
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typedef uint16_t __le16;
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typedef uint32_t __le32;
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typedef uint64_t __le64;
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#define BIT(nr) (1UL << (nr))
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#define FBSD_VERSION_MAJOR (__FreeBSD_version / 100000)
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#define FBSD_VERSION_MINOR ((__FreeBSD_version / 1000) - FBSD_VERSION_MAJOR * 100)
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#define FBSD_VERSION_PATCH (__FreeBSD_version - ((FBSD_VERSION_MAJOR * 100 + FBSD_VERSION_MINOR) * 1000))
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#endif // _GVE_PLAT_FBSD_H
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