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iris: Detect DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT kernel support

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We will use this for implementing deferred flushes in the next commit.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3802>
This commit is contained in:
Kenneth Graunke
2020-04-29 13:53:50 -07:00
committed by Marge Bot
parent 615270502c
commit df09efe8df
2 changed files with 14 additions and 0 deletions
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10
src/gallium/drivers/iris/iris_screen.c
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@@ -635,6 +635,14 @@ iris_shader_perf_log(void *data, const char *fmt, ...)
va_end(args);
}
static void
iris_detect_kernel_features(struct iris_screen *screen)
{
/* Kernel 5.2+ */
if (gen_gem_supports_syncobj_wait(screen->fd))
screen->kernel_features |= KERNEL_HAS_WAIT_FOR_SUBMIT;
}
struct pipe_screen *
iris_screen_create(int fd, const struct pipe_screen_config *config)
{
@@ -724,6 +732,8 @@ iris_screen_create(int fd, const struct pipe_screen_config *config)
iris_getparam_integer(screen->fd, I915_PARAM_SUBSLICE_TOTAL);
assert(screen->subslice_total >= 1);
iris_detect_kernel_features(screen);
struct pipe_screen *pscreen = &screen->base;
iris_init_screen_fence_functions(pscreen);

4
src/gallium/drivers/iris/iris_screen.h
View File

@@ -168,6 +168,10 @@ struct iris_screen {
bool always_flush_cache;
} driconf;
/** Does the kernel support various features (KERNEL_HAS_* bitfield)? */
unsigned kernel_features;
#define KERNEL_HAS_WAIT_FOR_SUBMIT (1<<0)
unsigned subslice_total;
uint64_t aperture_bytes;