c2175d2c51
Supports both PCI mode (for usage in guest VMs) and vhost-user mode (for usage in host processes). The rte_virtio subdirectory contains a lot of code lifted from the DPDK virtio-net driver. Most of the PCI and vhost-user code is reused almost exactly as-is, but the virtio code is drastically rewritten as the DPDK code was very network specific. Has been lightly tested with both the bdevio and bdevperf applications in both PCI and vhost-user modes. Still quite a bit of work needed - a list of todo items is included in a README in the module's directory. Signed-off-by: Jim Harris <james.r.harris@intel.com> Change-Id: I85989d3de9ea89a87b719ececdb6d2ac16b77f53 Reviewed-on: https://review.gerrithub.io/374519 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com>
121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
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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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*
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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _VHOST_NET_USER_H
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#define _VHOST_NET_USER_H
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#include <stdint.h>
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include "../virtio_pci.h"
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#include "../virtio_logs.h"
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#include "../virtqueue.h"
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struct vhost_vring_state {
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unsigned int index;
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unsigned int num;
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};
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struct vhost_vring_file {
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unsigned int index;
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int fd;
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};
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struct vhost_vring_addr {
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unsigned int index;
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/* Option flags. */
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unsigned int flags;
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/* Flag values: */
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/* Whether log address is valid. If set enables logging. */
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#define VHOST_VRING_F_LOG 0
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/* Start of array of descriptors (virtually contiguous) */
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uint64_t desc_user_addr;
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/* Used structure address. Must be 32 bit aligned */
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uint64_t used_user_addr;
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/* Available structure address. Must be 16 bit aligned */
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uint64_t avail_user_addr;
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/* Logging support. */
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/* Log writes to used structure, at offset calculated from specified
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* address. Address must be 32 bit aligned.
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*/
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uint64_t log_guest_addr;
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};
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enum vhost_user_request {
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VHOST_USER_NONE = 0,
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VHOST_USER_GET_FEATURES = 1,
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VHOST_USER_SET_FEATURES = 2,
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VHOST_USER_SET_OWNER = 3,
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VHOST_USER_RESET_OWNER = 4,
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VHOST_USER_SET_MEM_TABLE = 5,
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VHOST_USER_SET_LOG_BASE = 6,
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VHOST_USER_SET_LOG_FD = 7,
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VHOST_USER_SET_VRING_NUM = 8,
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VHOST_USER_SET_VRING_ADDR = 9,
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VHOST_USER_SET_VRING_BASE = 10,
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VHOST_USER_GET_VRING_BASE = 11,
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VHOST_USER_SET_VRING_KICK = 12,
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VHOST_USER_SET_VRING_CALL = 13,
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VHOST_USER_SET_VRING_ERR = 14,
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VHOST_USER_GET_PROTOCOL_FEATURES = 15,
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VHOST_USER_SET_PROTOCOL_FEATURES = 16,
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VHOST_USER_GET_QUEUE_NUM = 17,
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VHOST_USER_SET_VRING_ENABLE = 18,
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VHOST_USER_MAX
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};
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extern const char * const vhost_msg_strings[VHOST_USER_MAX];
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struct vhost_memory_region {
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uint64_t guest_phys_addr;
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uint64_t memory_size; /* bytes */
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uint64_t userspace_addr;
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uint64_t mmap_offset;
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};
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struct virtio_user_dev;
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struct virtio_user_backend_ops {
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int (*setup)(struct virtio_user_dev *dev);
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int (*send_request)(struct virtio_user_dev *dev,
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enum vhost_user_request req,
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void *arg);
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};
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extern struct virtio_user_backend_ops ops_user;
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extern struct virtio_user_backend_ops ops_kernel;
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#endif
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