b6e66be22b
Changelist:
- Replace netmap passthrough host support with a more general
mechanism to call TXSYNC/RXSYNC from an in-kernel event-loop.
No kernel threads are used to use this feature: the application
is required to spawn a thread (or a process) and issue a
SYNC_KLOOP_START (NIOCCTRL) command in the thread body. The
kernel loop is executed by the ioctl implementation, which returns
to userspace only when a different thread calls SYNC_KLOOP_STOP
or the netmap file descriptor is closed.
- Update the if_ptnet driver to cope with the new data structures,
and prune all the obsolete ptnetmap code.
- Add support for "null" netmap ports, useful to allocate netmap_if,
netmap_ring and netmap buffers to be used by specialized applications
(e.g. hypervisors). TXSYNC/RXSYNC on these ports have no effect.
- Various fixes and code refactoring.
Sponsored by: Sunny Valley Networks
Differential Revision: https://reviews.freebsd.org/D18015
101 lines
3.9 KiB
C
101 lines
3.9 KiB
C
/*
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* Copyright (C) 2013-2016 Luigi Rizzo
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* Copyright (C) 2013-2016 Giuseppe Lettieri
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* Copyright (C) 2013-2018 Vincenzo Maffione
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* Copyright (C) 2015 Stefano Garzarella
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef NETMAP_VIRT_H
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#define NETMAP_VIRT_H
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/*
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* Register offsets and other macros for the ptnetmap paravirtual devices:
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* ptnetmap-memdev: device used to expose memory into the guest
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* ptnet: paravirtualized NIC exposing a netmap port in the guest
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*
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* These macros are used in the hypervisor frontend (QEMU, bhyve) and in the
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* guest device driver.
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*/
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/* PCI identifiers and PCI BARs for ptnetmap-memdev and ptnet. */
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#define PTNETMAP_MEMDEV_NAME "ptnetmap-memdev"
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#define PTNETMAP_PCI_VENDOR_ID 0x1b36 /* QEMU virtual devices */
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#define PTNETMAP_PCI_DEVICE_ID 0x000c /* memory device */
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#define PTNETMAP_PCI_NETIF_ID 0x000d /* ptnet network interface */
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#define PTNETMAP_IO_PCI_BAR 0
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#define PTNETMAP_MEM_PCI_BAR 1
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#define PTNETMAP_MSIX_PCI_BAR 2
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/* Device registers for ptnetmap-memdev */
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#define PTNET_MDEV_IO_MEMSIZE_LO 0 /* netmap memory size (low) */
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#define PTNET_MDEV_IO_MEMSIZE_HI 4 /* netmap_memory_size (high) */
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#define PTNET_MDEV_IO_MEMID 8 /* memory allocator ID in the host */
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#define PTNET_MDEV_IO_IF_POOL_OFS 64
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#define PTNET_MDEV_IO_IF_POOL_OBJNUM 68
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#define PTNET_MDEV_IO_IF_POOL_OBJSZ 72
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#define PTNET_MDEV_IO_RING_POOL_OFS 76
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#define PTNET_MDEV_IO_RING_POOL_OBJNUM 80
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#define PTNET_MDEV_IO_RING_POOL_OBJSZ 84
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#define PTNET_MDEV_IO_BUF_POOL_OFS 88
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#define PTNET_MDEV_IO_BUF_POOL_OBJNUM 92
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#define PTNET_MDEV_IO_BUF_POOL_OBJSZ 96
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#define PTNET_MDEV_IO_END 100
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/* ptnetmap features */
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#define PTNETMAP_F_VNET_HDR 1
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/* Device registers for the ptnet network device. */
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#define PTNET_IO_PTFEAT 0
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#define PTNET_IO_PTCTL 4
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#define PTNET_IO_MAC_LO 8
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#define PTNET_IO_MAC_HI 12
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#define PTNET_IO_CSBBAH 16 /* deprecated */
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#define PTNET_IO_CSBBAL 20 /* deprecated */
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#define PTNET_IO_NIFP_OFS 24
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#define PTNET_IO_NUM_TX_RINGS 28
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#define PTNET_IO_NUM_RX_RINGS 32
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#define PTNET_IO_NUM_TX_SLOTS 36
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#define PTNET_IO_NUM_RX_SLOTS 40
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#define PTNET_IO_VNET_HDR_LEN 44
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#define PTNET_IO_HOSTMEMID 48
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#define PTNET_IO_CSB_GH_BAH 52
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#define PTNET_IO_CSB_GH_BAL 56
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#define PTNET_IO_CSB_HG_BAH 60
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#define PTNET_IO_CSB_HG_BAL 64
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#define PTNET_IO_END 68
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#define PTNET_IO_KICK_BASE 128
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#define PTNET_IO_MASK 0xff
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/* ptnet control commands (values for PTCTL register):
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* - CREATE starts the host sync-kloop
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* - DELETE stops the host sync-kloop
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*/
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#define PTNETMAP_PTCTL_CREATE 1
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#define PTNETMAP_PTCTL_DELETE 2
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#endif /* NETMAP_VIRT_H */
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