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virgl: get readback-formats from host

Browse source 
Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
This commit is contained in:
Erik Faye-Lund 2019-04-05 08:13:37 +02:00
parent 749bbd39c7
commit fba03322a2
3 changed files with 44 additions and 0 deletions
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1
src/gallium/drivers/virgl/virgl_hw.h
View file

@ -371,6 +371,7 @@ struct virgl_caps_v2 {
uint32_t max_combined_atomic_counters;
uint32_t max_combined_atomic_counter_buffers;
uint32_t host_feature_check_version;
struct virgl_supported_format_mask supported_readback_formats;
};
union virgl_caps {

40
src/gallium/drivers/virgl/virgl_screen.c
View file

@ -530,6 +530,27 @@ virgl_get_compute_param(struct pipe_screen *screen,
return 0;
}
static boolean
has_format_bit(struct virgl_supported_format_mask *mask,
enum virgl_formats fmt)
{
assert(fmt < VIRGL_FORMAT_MAX);
unsigned val = (unsigned)fmt;
unsigned idx = val / 32;
unsigned bit = val % 32;
assert(idx < ARRAY_SIZE(mask->bitmask));
return (mask->bitmask[val / 32] & (1u << bit)) != 0;
}
boolean
virgl_has_readback_format(struct pipe_screen *screen,
enum virgl_formats fmt)
{
struct virgl_screen *vscreen = virgl_screen(screen);
return has_format_bit(&vscreen->caps.caps.v2.supported_readback_formats,
fmt);
}
static boolean
virgl_is_vertex_format_supported(struct pipe_screen *screen,
enum pipe_format format)
@ -779,6 +800,24 @@ virgl_destroy_screen(struct pipe_screen *screen)
FREE(vscreen);
}
static void
fixup_readback_format(union virgl_caps *caps)
{
const size_t size = ARRAY_SIZE(caps->v2.supported_readback_formats.bitmask);
for (int i = 0; i < size; ++i) {
if (caps->v2.supported_readback_formats.bitmask[i] != 0)
return; /* we got some formats, we definately have a new protocol */
}
/* old protocol used; fall back to considering all sampleable formats valid
* readback-formats
*/
for (int i = 0; i < size; ++i) {
caps->v2.supported_readback_formats.bitmask[i] =
caps->v1.sampler.bitmask[i];
}
}
struct pipe_screen *
virgl_create_screen(struct virgl_winsys *vws)
{
@ -809,6 +848,7 @@ virgl_create_screen(struct virgl_winsys *vws)
virgl_init_screen_resource_functions(&screen->base);
vws->get_caps(vws, &screen->caps);
fixup_readback_format(&screen->caps.caps);
screen->refcnt = 1;

3
src/gallium/drivers/virgl/virgl_screen.h
View file

@ -55,6 +55,9 @@ virgl_screen(struct pipe_screen *pipe)
return (struct virgl_screen *)pipe;
}
boolean
virgl_has_readback_format(struct pipe_screen *screen, enum virgl_formats fmt);
#define VIRGL_MAP_BUFFER_ALIGNMENT 64
#endif