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virtio-gpu: Support suspension of commands processing

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Check whether command processing has been finished; otherwise, stop
processing commands and retry the command again next time. This allows
us to support asynchronous execution of non-fenced commands needed for
unmapping host blobs safely.

Suggested-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Message-Id: <20241024210311.118220-11-dmitry.osipenko@collabora.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Dmitry Osipenko 2024-10-25 00:03:08 +03:00 committed by Alex Bennée
parent df4c498e02
commit 640f9149c3
2 changed files with 7 additions and 0 deletions
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1
hw/display/trace-events
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@ -55,6 +55,7 @@ virtio_gpu_fence_ctrl(uint64_t fence, uint32_t type) "fence 0x%" PRIx64 ", type
virtio_gpu_fence_resp(uint64_t fence) "fence 0x%" PRIx64
virtio_gpu_inc_inflight_fences(uint32_t inflight) "in-flight+ %u"
virtio_gpu_dec_inflight_fences(uint32_t inflight) "in-flight- %u"
virtio_gpu_cmd_suspended(uint32_t cmd) "cmd 0x%x"
# qxl.c
disable qxl_io_write_vga(int qid, const char *mode, uint32_t addr, uint32_t val) "%d %s addr=%u val=%u"

6
hw/display/virtio-gpu.c
View File

@ -1034,6 +1034,12 @@ void virtio_gpu_process_cmdq(VirtIOGPU *g)
/* process command */
vgc->process_cmd(g, cmd);
/* command suspended */
if (!cmd->finished && !(cmd->cmd_hdr.flags & VIRTIO_GPU_FLAG_FENCE)) {
trace_virtio_gpu_cmd_suspended(cmd->cmd_hdr.type);
break;
}
QTAILQ_REMOVE(&g->cmdq, cmd, next);
if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
g->stats.requests++;