diff options
Diffstat (limited to 'src/gallium/drivers')
| -rw-r--r-- | src/gallium/drivers/radeon/r600_buffer_common.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c b/src/gallium/drivers/radeon/r600_buffer_common.c index 4e6b8978efb..154c33d7391 100644 --- a/src/gallium/drivers/radeon/r600_buffer_common.c +++ b/src/gallium/drivers/radeon/r600_buffer_common.c @@ -127,13 +127,17 @@ bool r600_init_resource(struct r600_common_screen *rscreen, break; } - /* Use GTT for all persistent mappings, because they are - * always cached and coherent. */ - if (res->b.b.target == PIPE_BUFFER && + /* Use GTT for all persistent mappings with older kernels, because they + * didn't always flush the HDP cache before CS execution. + * + * Write-combined CPU mappings are fine, the kernel ensures all CPU + * writes finish before the GPU executes a command stream. + */ + if (rscreen->info.drm_minor < 40 && + res->b.b.target == PIPE_BUFFER && res->b.b.flags & (PIPE_RESOURCE_FLAG_MAP_PERSISTENT | PIPE_RESOURCE_FLAG_MAP_COHERENT)) { res->domains = RADEON_DOMAIN_GTT; - flags = 0; } /* Tiled textures are unmappable. Always put them in VRAM. */ |