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ee241d79bb
Apple has its own virtio-blk PCI device ID where it deviates from the official virtio-pci spec slightly: It puts a new "apple type" field at a static offset in config space and introduces a new barrier command. This patch first creates a mechanism for virtio-blk downstream classes to handle unknown commands. It then creates such a downstream class and a new vmapple-virtio-blk-pci class which support the additional apple type config identifier as well as the barrier command. The 'aux' or 'root' device type are selected using the 'variant' property. Signed-off-by: Alexander Graf <graf@amazon.com> Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Tested-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-ID: <20241223221645.29911-13-phil@philjordan.eu> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
/*
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* Virtio Block Device
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*
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* Copyright IBM, Corp. 2007
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_VIRTIO_BLK_H
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#define QEMU_VIRTIO_BLK_H
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#include "standard-headers/linux/virtio_blk.h"
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#include "hw/virtio/virtio.h"
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#include "hw/block/block.h"
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#include "system/iothread.h"
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#include "system/block-backend.h"
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#include "system/block-ram-registrar.h"
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#include "qom/object.h"
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#include "qapi/qapi-types-virtio.h"
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#define TYPE_VIRTIO_BLK "virtio-blk-device"
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OBJECT_DECLARE_TYPE(VirtIOBlock, VirtIOBlkClass, VIRTIO_BLK)
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/* This is the last element of the write scatter-gather list */
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struct virtio_blk_inhdr
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{
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unsigned char status;
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};
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#define VIRTIO_BLK_AUTO_NUM_QUEUES UINT16_MAX
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struct VirtIOBlkConf
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{
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BlockConf conf;
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IOThread *iothread;
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IOThreadVirtQueueMappingList *iothread_vq_mapping_list;
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char *serial;
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uint32_t request_merging;
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uint16_t num_queues;
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uint16_t queue_size;
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bool seg_max_adjust;
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bool report_discard_granularity;
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uint32_t max_discard_sectors;
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uint32_t max_write_zeroes_sectors;
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bool x_enable_wce_if_config_wce;
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};
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struct VirtIOBlockReq;
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struct VirtIOBlock {
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VirtIODevice parent_obj;
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BlockBackend *blk;
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QemuMutex rq_lock;
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struct VirtIOBlockReq *rq; /* protected by rq_lock */
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VirtIOBlkConf conf;
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unsigned short sector_mask;
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bool original_wce;
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VMChangeStateEntry *change;
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bool ioeventfd_disabled;
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bool ioeventfd_started;
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bool ioeventfd_starting;
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bool ioeventfd_stopping;
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/*
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* The AioContext for each virtqueue. The BlockDriverState will use the
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* first element as its AioContext.
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*/
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AioContext **vq_aio_context;
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uint64_t host_features;
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size_t config_size;
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BlockRAMRegistrar blk_ram_registrar;
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};
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typedef struct VirtIOBlockReq {
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VirtQueueElement elem;
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int64_t sector_num;
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VirtIOBlock *dev;
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VirtQueue *vq;
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IOVDiscardUndo inhdr_undo;
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IOVDiscardUndo outhdr_undo;
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struct virtio_blk_inhdr *in;
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struct virtio_blk_outhdr out;
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QEMUIOVector qiov;
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size_t in_len;
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struct VirtIOBlockReq *next;
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struct VirtIOBlockReq *mr_next;
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BlockAcctCookie acct;
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} VirtIOBlockReq;
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#define VIRTIO_BLK_MAX_MERGE_REQS 32
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typedef struct MultiReqBuffer {
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VirtIOBlockReq *reqs[VIRTIO_BLK_MAX_MERGE_REQS];
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unsigned int num_reqs;
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bool is_write;
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} MultiReqBuffer;
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typedef struct VirtIOBlkClass {
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/*< private >*/
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VirtioDeviceClass parent;
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/*< public >*/
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bool (*handle_unknown_request)(VirtIOBlockReq *req, MultiReqBuffer *mrb,
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uint32_t type);
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} VirtIOBlkClass;
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void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq);
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void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char status);
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#endif
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