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contrib/vhost-user-gpu: add support for sending dmabuf modifiers

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virglrenderer recently added virgl_renderer_resource_get_info_ext as a
new api, which gets resource information, including dmabuf modifiers.

We have to support dmabuf modifiers since the driver may choose to
allocate buffers with these modifiers for efficiency, and importing
buffers without modifiers information may result in completely broken
rendering.

Signed-off-by: Erico Nunes <ernunes@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Message-Id: <20230714153900.475857-3-ernunes@redhat.com>
This commit is contained in:
Erico Nunes 2023-07-14 17:38:59 +02:00 committed by Marc-André Lureau
parent 75f217b4ad
commit e3c82fe04f
3 changed files with 61 additions and 4 deletions
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5
contrib/vhost-user-gpu/vhost-user-gpu.c
View file

@ -1071,6 +1071,7 @@ static gboolean
protocol_features_cb(gint fd, GIOCondition condition, gpointer user_data)
{
const uint64_t protocol_edid = (1 << VHOST_USER_GPU_PROTOCOL_F_EDID);
const uint64_t protocol_dmabuf2 = (1 << VHOST_USER_GPU_PROTOCOL_F_DMABUF2);
VuGpu *g = user_data;
uint64_t protocol_features;
VhostUserGpuMsg msg = {
@ -1082,7 +1083,7 @@ protocol_features_cb(gint fd, GIOCondition condition, gpointer user_data)
return G_SOURCE_CONTINUE;
}
protocol_features &= protocol_edid;
protocol_features &= (protocol_edid | protocol_dmabuf2);
msg = (VhostUserGpuMsg) {
.request = VHOST_USER_GPU_SET_PROTOCOL_FEATURES,
@ -1100,6 +1101,8 @@ protocol_features_cb(gint fd, GIOCondition condition, gpointer user_data)
exit(EXIT_FAILURE);
}
g->use_modifiers = !!(protocol_features & protocol_dmabuf2);
return G_SOURCE_REMOVE;
}

51
contrib/vhost-user-gpu/virgl.c
View file

@ -318,6 +318,37 @@ virgl_resource_detach_backing(VuGpu *g,
vg_cleanup_mapping_iov(g, res_iovs, num_iovs);
}
static int
virgl_get_resource_info_modifiers(uint32_t resource_id,
struct virgl_renderer_resource_info *info,
uint64_t *modifiers)
{
int ret;
#ifdef VIRGL_RENDERER_RESOURCE_INFO_EXT_VERSION
struct virgl_renderer_resource_info_ext info_ext;
ret = virgl_renderer_resource_get_info_ext(resource_id, &info_ext);
if (ret < 0) {
return ret;
}
*info = info_ext.base;
*modifiers = info_ext.modifiers;
#else
ret = virgl_renderer_resource_get_info(resource_id, info);
if (ret < 0) {
return ret;
}
/*
* Before virgl_renderer_resource_get_info_ext,
* getting the modifiers was not possible.
*/
*modifiers = 0;
#endif
return 0;
}
static void
virgl_cmd_set_scanout(VuGpu *g,
struct virtio_gpu_ctrl_command *cmd)
@ -338,7 +369,9 @@ virgl_cmd_set_scanout(VuGpu *g,
memset(&info, 0, sizeof(info));
if (ss.resource_id && ss.r.width && ss.r.height) {
ret = virgl_renderer_resource_get_info(ss.resource_id, &info);
uint64_t modifiers = 0;
ret = virgl_get_resource_info_modifiers(ss.resource_id, &info,
&modifiers);
if (ret == -1) {
g_critical("%s: illegal resource specified %d\n",
__func__, ss.resource_id);
@ -354,8 +387,6 @@ virgl_cmd_set_scanout(VuGpu *g,
}
assert(fd >= 0);
VhostUserGpuMsg msg = {
.request = VHOST_USER_GPU_DMABUF_SCANOUT,
.size = sizeof(VhostUserGpuDMABUFScanout),
.payload.dmabuf_scanout.scanout_id = ss.scanout_id,
.payload.dmabuf_scanout.x = ss.r.x,
.payload.dmabuf_scanout.y = ss.r.y,
@ -367,6 +398,20 @@ virgl_cmd_set_scanout(VuGpu *g,
.payload.dmabuf_scanout.fd_flags = info.flags,
.payload.dmabuf_scanout.fd_drm_fourcc = info.drm_fourcc
};
if (g->use_modifiers) {
/*
* The mesage uses all the fields set in dmabuf_scanout plus
* modifiers which is appended after VhostUserGpuDMABUFScanout.
*/
msg.request = VHOST_USER_GPU_DMABUF_SCANOUT2;
msg.size = sizeof(VhostUserGpuDMABUFScanout2);
msg.payload.dmabuf_scanout2.modifier = modifiers;
} else {
msg.request = VHOST_USER_GPU_DMABUF_SCANOUT;
msg.size = sizeof(VhostUserGpuDMABUFScanout);
}
vg_send_msg(g, &msg, fd);
close(fd);
} else {

9
contrib/vhost-user-gpu/vugpu.h
View file

@ -37,6 +37,7 @@ typedef enum VhostUserGpuRequest {
VHOST_USER_GPU_DMABUF_SCANOUT,
VHOST_USER_GPU_DMABUF_UPDATE,
VHOST_USER_GPU_GET_EDID,
VHOST_USER_GPU_DMABUF_SCANOUT2,
} VhostUserGpuRequest;
typedef struct VhostUserGpuDisplayInfoReply {
@ -84,6 +85,11 @@ typedef struct VhostUserGpuDMABUFScanout {
int fd_drm_fourcc;
} QEMU_PACKED VhostUserGpuDMABUFScanout;
typedef struct VhostUserGpuDMABUFScanout2 {
struct VhostUserGpuDMABUFScanout dmabuf_scanout;
uint64_t modifier;
} QEMU_PACKED VhostUserGpuDMABUFScanout2;
typedef struct VhostUserGpuEdidRequest {
uint32_t scanout_id;
} QEMU_PACKED VhostUserGpuEdidRequest;
@ -98,6 +104,7 @@ typedef struct VhostUserGpuMsg {
VhostUserGpuScanout scanout;
VhostUserGpuUpdate update;
VhostUserGpuDMABUFScanout dmabuf_scanout;
VhostUserGpuDMABUFScanout2 dmabuf_scanout2;
VhostUserGpuEdidRequest edid_req;
struct virtio_gpu_resp_edid resp_edid;
struct virtio_gpu_resp_display_info display_info;
@ -112,6 +119,7 @@ static VhostUserGpuMsg m __attribute__ ((unused));
#define VHOST_USER_GPU_MSG_FLAG_REPLY 0x4
#define VHOST_USER_GPU_PROTOCOL_F_EDID 0
#define VHOST_USER_GPU_PROTOCOL_F_DMABUF2 1
struct virtio_gpu_scanout {
uint32_t width, height;
@ -132,6 +140,7 @@ typedef struct VuGpu {
bool virgl;
bool virgl_inited;
bool edid_inited;
bool use_modifiers;
uint32_t inflight;
struct virtio_gpu_scanout scanout[VIRTIO_GPU_MAX_SCANOUTS];