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Re: [QEMU PATCH v4 09/13] virtio-gpu: Handle resource blob commands
From: |
Huang Rui |
Subject: |
Re: [QEMU PATCH v4 09/13] virtio-gpu: Handle resource blob commands |
Date: |
Tue, 5 Sep 2023 17:08:40 +0800 |
On Thu, Aug 31, 2023 at 06:24:32PM +0800, Akihiko Odaki wrote:
> On 2023/08/31 18:32, Huang Rui wrote:
> > From: Antonio Caggiano <antonio.caggiano@collabora.com>
> >
> > 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@collabora.com>
> > Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
> > Signed-off-by: Xenia Ragiadakou <xenia.ragiadakou@amd.com>
> > Signed-off-by: Huang Rui <ray.huang@amd.com>
> > ---
> >
> > v1->v2:
> > - Remove unused #include "hw/virtio/virtio-iommu.h"
> >
> > - Add a local function, called virgl_resource_destroy(), that is used
> > to release a vgpu resource on error paths and in resource_unref.
> >
> > - Remove virtio_gpu_virgl_resource_unmap from
> > virtio_gpu_cleanup_mapping(),
> > since this function won't be called on blob resources and also
> > because
> > blob resources are unmapped via virgl_cmd_resource_unmap_blob().
> >
> > - In virgl_cmd_resource_create_blob(), do proper cleanup in error paths
> > and move QTAILQ_INSERT_HEAD(&g->reslist, res, next) after the
> > resource
> > has been fully initialized.
> >
> > - Memory region has a different life-cycle from virtio gpu resources
> > i.e. cannot be released synchronously along with the vgpu resource.
> > So, here the field "region" was changed to a pointer that will be
> > released automatically once the memory region is unparented and all
> > of its references have been released.
> > Also, since the pointer can be used to indicate whether the blob
> > is mapped, the explicit field "mapped" was removed.
> >
> > - In virgl_cmd_resource_map_blob(), add check on the value of
> > res->region, to prevent beeing called twice on the same resource.
> >
> > - Remove direct references to parent_obj.
> >
> > - Separate declarations from code.
> >
> > 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..17b634d4ee 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;
> > +
> > + QTAILQ_REMOVE(&g->reslist, res, next);
> > +
> > + virtio_gpu_cleanup_mapping_iov(g, res->iov, res->iov_cnt);
> > + g_free(res->addrs);
> > +
> > + g_free(res);
> > +}
> > +
> > 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;
> > + }
> > +
> > + 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) {
> > + virgl_renderer_resource_unmap(res->resource_id);
> > + cmd->error = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
> > + return;
> > + }
> > + memory_region_init_ram_device_ptr(res->region, OBJECT(g), NULL, size,
> > data);
>
> I think memory_region_init_ram_ptr() should be used instead.
Would you mind to explain the reason?
Thanks,
Ray
- Re: [QEMU PATCH v4 09/13] virtio-gpu: Handle resource blob commands,
Huang Rui <=