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virgl/drm: explicit context initialization

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If the host supports explicit context initialization, try it.
If no capabilitiies associated with virgl are present, return
an error.

Reviewed-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Tested-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7712>
This commit is contained in:
Gurchetan Singh 2020-11-19 14:20:55 -08:00 • committed by Marge Bot
parent 293c57e12c
commit 9a7d6a110e
1 changed files with 50 additions and 0 deletions
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50
src/gallium/winsys/virgl/drm/virgl_drm_winsys.c
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@ -48,6 +48,9 @@
#include "virgl_drm_winsys.h"
#include "virgl_drm_public.h"
// Delete local definitions when virglrenderer_hw.h becomes public
#define VIRGL_DRM_CAPSET_VIRGL 1
#define VIRGL_DRM_CAPSET_VIRGL2 2
#define VIRGL_DRM_VERSION(major, minor) ((major) << 16 | (minor))
#define VIRGL_DRM_VERSION_FENCE_FD VIRGL_DRM_VERSION(0, 1)
@ -1152,6 +1155,47 @@ virgl_drm_resource_cache_entry_release(struct virgl_resource_cache_entry *entry,
virgl_hw_res_destroy(qdws, res);
}
static int virgl_init_context(int drmFD)
{
int ret;
struct drm_virtgpu_context_init init = { 0 };
struct drm_virtgpu_context_set_param ctx_set_param = { 0 };
uint64_t supports_capset_virgl, supports_capset_virgl2;
supports_capset_virgl = supports_capset_virgl2 = 0;
supports_capset_virgl = ((1 << VIRGL_DRM_CAPSET_VIRGL) &
params[param_supported_capset_ids].value);
supports_capset_virgl2 = ((1 << VIRGL_DRM_CAPSET_VIRGL2) &
params[param_supported_capset_ids].value);
if (!supports_capset_virgl && !supports_capset_virgl2) {
_debug_printf("No virgl contexts available on host");
return -EINVAL;
}
ctx_set_param.param = VIRTGPU_CONTEXT_PARAM_CAPSET_ID;
ctx_set_param.value = (supports_capset_virgl2) ?
VIRGL_DRM_CAPSET_VIRGL2 :
VIRGL_DRM_CAPSET_VIRGL;
init.ctx_set_params = (unsigned long)(void *)&ctx_set_param;
init.num_params = 1;
ret = drmIoctl(drmFD, DRM_IOCTL_VIRTGPU_CONTEXT_INIT, &init);
/*
* EEXIST happens when a compositor does DUMB_CREATE before initializing
* virgl.
*/
if (ret && errno != EEXIST) {
_debug_printf("DRM_IOCTL_VIRTGPU_CONTEXT_INIT failed with %s\n",
strerror(errno));
return -1;
}
return 0;
}
static struct virgl_winsys *
virgl_drm_winsys_create(int drmFD)
{
@ -1180,6 +1224,12 @@ virgl_drm_winsys_create(int drmFD)
if (!qdws)
return NULL;
if (params[param_context_init].value) {
ret = virgl_init_context(drmFD);
if (ret)
return NULL;
}
qdws->fd = drmFD;
virgl_resource_cache_init(&qdws->cache, CACHE_TIMEOUT_USEC,
virgl_drm_resource_cache_entry_is_busy,