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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [QEMU PATCH v5 09/13] virtio-gpu: Handle resource blob commands
Hi
On Fri, Sep 15, 2023 at 3:14 PM Huang Rui <ray.huang@xxxxxxx> wrote:
>
> From: Antonio Caggiano <antonio.caggiano@xxxxxxxxxxxxx>
>
> Support BLOB resources creation, mapping and unmapping by calling the
> new stable virglrenderer 0.10 interface. Only enabled when available and
> via the blob config. E.g. -device virtio-vga-gl,blob=true
>
> Signed-off-by: Antonio Caggiano <antonio.caggiano@xxxxxxxxxxxxx>
> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
> Signed-off-by: Xenia Ragiadakou <xenia.ragiadakou@xxxxxxx>
> Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
> ---
>
> V4 -> V5:
> - Use memory_region_init_ram_ptr() instead of
> memory_region_init_ram_device_ptr() (Akihiko)
>
> hw/display/virtio-gpu-virgl.c | 213 +++++++++++++++++++++++++++++++++
> hw/display/virtio-gpu.c | 4 +-
> include/hw/virtio/virtio-gpu.h | 5 +
> meson.build | 4 +
> 4 files changed, 225 insertions(+), 1 deletion(-)
>
> diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c
> index 312953ec16..563a6f2f58 100644
> --- a/hw/display/virtio-gpu-virgl.c
> +++ b/hw/display/virtio-gpu-virgl.c
> @@ -17,6 +17,7 @@
> #include "trace.h"
> #include "hw/virtio/virtio.h"
> #include "hw/virtio/virtio-gpu.h"
> +#include "hw/virtio/virtio-gpu-bswap.h"
>
> #include "ui/egl-helpers.h"
>
> @@ -78,9 +79,24 @@ static void virgl_cmd_create_resource_3d(VirtIOGPU *g,
> virgl_renderer_resource_create(&args, NULL, 0);
> }
>
> +static void virgl_resource_destroy(VirtIOGPU *g,
> + struct virtio_gpu_simple_resource *res)
> +{
> + if (!res)
> + return;
> +
QEMU coding style imposes braces
> + QTAILQ_REMOVE(&g->reslist, res, next);
> +
> + virtio_gpu_cleanup_mapping_iov(g, res->iov, res->iov_cnt);
> + g_free(res->addrs);
> +
> + g_free(res);
If you embed virtio_gpu_simple_resource in a new struct, we should
instead call the existing virtio_gpu_resource_destroy() I guess.
> +}
> +
> static void virgl_cmd_resource_unref(VirtIOGPU *g,
> struct virtio_gpu_ctrl_command *cmd)
> {
> + struct virtio_gpu_simple_resource *res;
> struct virtio_gpu_resource_unref unref;
> struct iovec *res_iovs = NULL;
> int num_iovs = 0;
> @@ -88,13 +104,22 @@ static void virgl_cmd_resource_unref(VirtIOGPU *g,
> VIRTIO_GPU_FILL_CMD(unref);
> trace_virtio_gpu_cmd_res_unref(unref.resource_id);
>
> + res = virtio_gpu_find_resource(g, unref.resource_id);
> +
> virgl_renderer_resource_detach_iov(unref.resource_id,
> &res_iovs,
> &num_iovs);
> if (res_iovs != NULL && num_iovs != 0) {
> virtio_gpu_cleanup_mapping_iov(g, res_iovs, num_iovs);
> + if (res) {
> + res->iov = NULL;
> + res->iov_cnt = 0;
> + }
> }
> +
> virgl_renderer_resource_unref(unref.resource_id);
> +
> + virgl_resource_destroy(g, res);
> }
>
> static void virgl_cmd_context_create(VirtIOGPU *g,
> @@ -426,6 +451,183 @@ static void virgl_cmd_get_capset(VirtIOGPU *g,
> g_free(resp);
> }
>
> +#ifdef HAVE_VIRGL_RESOURCE_BLOB
> +
> +static void virgl_cmd_resource_create_blob(VirtIOGPU *g,
> + struct virtio_gpu_ctrl_command
> *cmd)
> +{
> + struct virtio_gpu_simple_resource *res;
> + struct virtio_gpu_resource_create_blob cblob;
> + struct virgl_renderer_resource_create_blob_args virgl_args = { 0 };
> + int ret;
> +
> + VIRTIO_GPU_FILL_CMD(cblob);
> + virtio_gpu_create_blob_bswap(&cblob);
> + trace_virtio_gpu_cmd_res_create_blob(cblob.resource_id, cblob.size);
> +
> + if (cblob.resource_id == 0) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: resource id 0 is not allowed\n",
> + __func__);
> + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> + return;
> + }
> +
> + res = virtio_gpu_find_resource(g, cblob.resource_id);
> + if (res) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: resource already exists %d\n",
> + __func__, cblob.resource_id);
> + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> + return;
> + }
> +
> + res = g_new0(struct virtio_gpu_simple_resource, 1);
> + if (!res) {
> + cmd->error = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
> + return;
needless error handling, glib will abort() on OOM.
> + }
> +
> + res->resource_id = cblob.resource_id;
> + res->blob_size = cblob.size;
> +
> + if (cblob.blob_mem != VIRTIO_GPU_BLOB_MEM_HOST3D) {
> + ret = virtio_gpu_create_mapping_iov(g, cblob.nr_entries,
> sizeof(cblob),
> + cmd, &res->addrs, &res->iov,
> + &res->iov_cnt);
> + if (!ret) {
> + g_free(res);
> + cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
> + return;
> + }
> + }
> +
> + QTAILQ_INSERT_HEAD(&g->reslist, res, next);
> +
> + virgl_args.res_handle = cblob.resource_id;
> + virgl_args.ctx_id = cblob.hdr.ctx_id;
> + virgl_args.blob_mem = cblob.blob_mem;
> + virgl_args.blob_id = cblob.blob_id;
> + virgl_args.blob_flags = cblob.blob_flags;
> + virgl_args.size = cblob.size;
> + virgl_args.iovecs = res->iov;
> + virgl_args.num_iovs = res->iov_cnt;
> +
> + ret = virgl_renderer_resource_create_blob(&virgl_args);
> + if (ret) {
> + virgl_resource_destroy(g, res);
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: virgl blob create error: %s\n",
> + __func__, strerror(-ret));
> + cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
> + }
> +}
> +
> +static void virgl_cmd_resource_map_blob(VirtIOGPU *g,
> + struct virtio_gpu_ctrl_command *cmd)
> +{
> + struct virtio_gpu_simple_resource *res;
> + struct virtio_gpu_resource_map_blob mblob;
> + int ret;
> + void *data;
> + uint64_t size;
> + struct virtio_gpu_resp_map_info resp;
> + VirtIOGPUBase *b = VIRTIO_GPU_BASE(g);
> +
> + VIRTIO_GPU_FILL_CMD(mblob);
> + virtio_gpu_map_blob_bswap(&mblob);
> +
> + if (mblob.resource_id == 0) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: resource id 0 is not allowed\n",
> + __func__);
> + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> + return;
> + }
> +
> + res = virtio_gpu_find_resource(g, mblob.resource_id);
> + if (!res) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: resource does not exist %d\n",
> + __func__, mblob.resource_id);
> + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> + return;
> + }
> + if (res->region) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: resource already mapped %d\n",
> + __func__, mblob.resource_id);
> + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> + return;
> + }
> +
> + ret = virgl_renderer_resource_map(res->resource_id, &data, &size);
> + if (ret) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: resource map error: %s\n",
> + __func__, strerror(-ret));
> + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> + return;
> + }
> +
> + res->region = g_new0(MemoryRegion, 1);
> + if (!res->region) {
no need for OOM handling here too
> + virgl_renderer_resource_unmap(res->resource_id);
> + cmd->error = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
> + return;
> + }
> + memory_region_init_ram_ptr(res->region, OBJECT(g), NULL, size, data);
> + OBJECT(res->region)->free = g_free;
> + memory_region_add_subregion(&b->hostmem, mblob.offset, res->region);
> + memory_region_set_enabled(res->region, true);
> +
> + memset(&resp, 0, sizeof(resp));
> + resp.hdr.type = VIRTIO_GPU_RESP_OK_MAP_INFO;
> + virgl_renderer_resource_get_map_info(mblob.resource_id, &resp.map_info);
> + virtio_gpu_ctrl_response(g, cmd, &resp.hdr, sizeof(resp));
> +}
> +
> +static int virtio_gpu_virgl_resource_unmap(VirtIOGPU *g,
> + struct virtio_gpu_simple_resource
> + *res)
> +{
> + VirtIOGPUBase *b = VIRTIO_GPU_BASE(g);
> +
> + if (!res) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: resource already unmapped %d\n",
> + __func__, res->resource_id);
> + return VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> + }
> +
> + memory_region_set_enabled(res->region, false);
> + memory_region_del_subregion(&b->hostmem, res->region);
> + object_unparent(OBJECT(res->region));
> + res->region = NULL;
> +
> + return virgl_renderer_resource_unmap(res->resource_id);
> +}
> +
> +static void virgl_cmd_resource_unmap_blob(VirtIOGPU *g,
> + struct virtio_gpu_ctrl_command
> *cmd)
> +{
> + struct virtio_gpu_simple_resource *res;
> + struct virtio_gpu_resource_unmap_blob ublob;
> + VIRTIO_GPU_FILL_CMD(ublob);
> + virtio_gpu_unmap_blob_bswap(&ublob);
> +
> + if (ublob.resource_id == 0) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: resource id 0 is not allowed\n",
> + __func__);
> + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> + return;
> + }
> +
> + res = virtio_gpu_find_resource(g, ublob.resource_id);
> + if (!res) {
> + qemu_log_mask(LOG_GUEST_ERROR, "%s: resource does not exist %d\n",
> + __func__, ublob.resource_id);
> + cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
> + return;
> + }
> +
> + virtio_gpu_virgl_resource_unmap(g, res);
> +}
> +
> +#endif /* HAVE_VIRGL_RESOURCE_BLOB */
> +
> void virtio_gpu_virgl_process_cmd(VirtIOGPU *g,
> struct virtio_gpu_ctrl_command *cmd)
> {
> @@ -492,6 +694,17 @@ void virtio_gpu_virgl_process_cmd(VirtIOGPU *g,
> case VIRTIO_GPU_CMD_GET_EDID:
> virtio_gpu_get_edid(g, cmd);
> break;
> +#ifdef HAVE_VIRGL_RESOURCE_BLOB
> + case VIRTIO_GPU_CMD_RESOURCE_CREATE_BLOB:
> + virgl_cmd_resource_create_blob(g, cmd);
> + break;
> + case VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB:
> + virgl_cmd_resource_map_blob(g, cmd);
> + break;
> + case VIRTIO_GPU_CMD_RESOURCE_UNMAP_BLOB:
> + virgl_cmd_resource_unmap_blob(g, cmd);
> + break;
> +#endif /* HAVE_VIRGL_RESOURCE_BLOB */
> default:
> cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
> break;
> diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
> index 5b7a7eab4f..cc4c1f81bb 100644
> --- a/hw/display/virtio-gpu.c
> +++ b/hw/display/virtio-gpu.c
> @@ -1367,10 +1367,12 @@ void virtio_gpu_device_realize(DeviceState *qdev,
> Error **errp)
> return;
> }
>
> +#ifndef HAVE_VIRGL_RESOURCE_BLOB
> if (virtio_gpu_virgl_enabled(g->parent_obj.conf)) {
> - error_setg(errp, "blobs and virgl are not compatible (yet)");
> + error_setg(errp, "Linked virglrenderer does not support blob
> resources");
> return;
> }
> +#endif
> }
>
> if (!virtio_gpu_base_device_realize(qdev,
> diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
> index 55973e112f..b9adc28071 100644
> --- a/include/hw/virtio/virtio-gpu.h
> +++ b/include/hw/virtio/virtio-gpu.h
> @@ -58,6 +58,11 @@ struct virtio_gpu_simple_resource {
> int dmabuf_fd;
> uint8_t *remapped;
>
> +#ifdef HAVE_VIRGL_RESOURCE_BLOB
> + /* only blob resource needs this region to be mapped as guest mmio */
> + MemoryRegion *region;
> +#endif
> +
> QTAILQ_ENTRY(virtio_gpu_simple_resource) next;
> };
>
> diff --git a/meson.build b/meson.build
> index ff20d3c249..f7b744ab82 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -1072,6 +1072,10 @@ if not get_option('virglrenderer').auto() or
> have_system or have_vhost_user_gpu
>
> cc.has_function('virgl_renderer_context_create_with_flags',
> prefix: '#include <virglrenderer.h>',
> dependencies: virgl))
> + config_host_data.set('HAVE_VIRGL_RESOURCE_BLOB',
> + cc.has_function('virgl_renderer_resource_create_blob',
> + prefix: '#include <virglrenderer.h>',
> + dependencies: virgl))
better moved under the if virgl.found() block
> endif
> blkio = not_found
> if not get_option('blkio').auto() or have_block
> --
> 2.34.1
>
>
--
Marc-André Lureau
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