65b6d8f495
bdev_module_init_done could be called multiple times when more than device is available. Change-Id: I17ee63a818945359648953c4f8f67678d10e8907 Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com> Reviewed-on: https://review.gerrithub.io/379864 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2015 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 _VIRTIO_DEV_H_
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#define _VIRTIO_DEV_H_
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#include <stdint.h>
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#include <sys/uio.h>
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#include <sys/queue.h>
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#define VIRTIO_MAX_RX_QUEUES 128U
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#define VIRTIO_MAX_TX_QUEUES 128U
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#define VIRTIO_MIN_RX_BUFSIZE 64
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struct virtio_dev {
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struct virtqueue **vqs;
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uint16_t started;
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uint32_t max_queues;
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uint8_t port_id;
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uint64_t req_guest_features;
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uint64_t guest_features;
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int is_hw;
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/** Modern/legacy virtio device flag. */
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uint8_t modern;
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TAILQ_ENTRY(virtio_dev) tailq;
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};
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struct virtio_req {
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struct iovec *iov;
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struct iovec iov_req;
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struct iovec iov_resp;
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uint32_t iovcnt;
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int is_write;
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uint32_t data_transferred;
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};
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/* Features desired/implemented by this driver. */
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#define VIRTIO_SCSI_DEV_SUPPORTED_FEATURES \
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(1ULL << VIRTIO_SCSI_F_INOUT | \
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1ULL << VIRTIO_F_VERSION_1 | \
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1ULL << VIRTIO_F_IOMMU_PLATFORM)
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uint16_t virtio_recv_pkts(struct virtqueue *vq, struct virtio_req **reqs,
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uint16_t nb_pkts);
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uint16_t virtio_xmit_pkts(struct virtqueue *vq, struct virtio_req *req);
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int virtio_init_device(struct virtio_dev *hw, uint64_t req_features);
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int virtio_dev_start(struct virtio_dev *hw);
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struct virtio_dev *get_pci_virtio_hw(void);
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void virtio_interrupt_handler(void *param);
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#endif /* _VIRTIO_DEV_H_ */
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