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Re: [QEMU PATCH v5 09/13] virtio-gpu: Handle resource blob commands
- To: Huang Rui <ray.huang@xxxxxxx>, Gerd Hoffmann <kraxel@xxxxxxxxxx>, "Michael S . Tsirkin" <mst@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Antonio Caggiano <quic_acaggian@xxxxxxxxxxx>, "Dr . David Alan Gilbert" <dgilbert@xxxxxxxxxx>, Robert Beckett <bob.beckett@xxxxxxxxxxxxx>, Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>, Alex Bennée <alex.bennee@xxxxxxxxxx>, qemu-devel@xxxxxxxxxx
- From: Akihiko Odaki <akihiko.odaki@xxxxxxxxxx>
- Date: Sat, 16 Sep 2023 01:04:17 +0900
- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Gurchetan Singh <gurchetansingh@xxxxxxxxxxxx>, Albert Esteve <aesteve@xxxxxxxxxx>, ernunes@xxxxxxxxxx, Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>, Alyssa Ross <hi@xxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Alex Deucher <alexander.deucher@xxxxxxx>, Christian König <christian.koenig@xxxxxxx>, Xenia Ragiadakou <xenia.ragiadakou@xxxxxxx>, Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@xxxxxxx>, Honglei Huang <honglei1.huang@xxxxxxx>, Julia Zhang <julia.zhang@xxxxxxx>, Chen Jiqian <Jiqian.Chen@xxxxxxx>, Antonio Caggiano <antonio.caggiano@xxxxxxxxxxxxx>
- Delivery-date: Fri, 15 Sep 2023 16:04:48 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 2023/09/15 20:11, Huang Rui 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;
+
+ 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_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;
This returns enum virtio_gpu_ctrl_type while
virgl_renderer_resource_unmap() returns -errno and the returned error
code is ignored.
I think you can just inline this function into
virgl_cmd_resource_unmap_blob(). It will be more concise and consistent
with virgl_cmd_resource_map_blob().
+ }
+
+ 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
+
Since this is specific to virgl, let's create a struct that embeds
virtio_gpu_simple_resource and use it to avoid modifying virtio-gpu
common code.
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