From: Nicolai Hähnle <nicolai.haeh...@amd.com>
When passed to winsys->buffer_create, this flag will indicate that we require
a buffer that maps 1:1 with a kernel buffer handle.
This is currently set for all textures, since textures can potentially be
exported to other processes. This is not a huge loss, since the main purpose
of this patch series is to deal with applications that allocate many small
buffers.
A hypothetical application with tons of tiny textures might still benefit
from not setting this flag, but that's not a use case I'm worried about
just now.
---
src/gallium/drivers/r300/r300_texture.c | 2 +-
src/gallium/drivers/radeon/r600_texture.c | 2 ++
src/gallium/drivers/radeon/radeon_winsys.h | 1 +
src/gallium/winsys/amdgpu/drm/amdgpu_bo.c | 3 +++
src/gallium/winsys/radeon/drm/radeon_drm_bo.c | 3 +++
src/gallium/winsys/radeon/drm/radeon_drm_cs.c | 2 +-
6 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/src/gallium/drivers/r300/r300_texture.c
b/src/gallium/drivers/r300/r300_texture.c
index 5f459e4..fbac07a 100644
--- a/src/gallium/drivers/r300/r300_texture.c
+++ b/src/gallium/drivers/r300/r300_texture.c
@@ -1107,21 +1107,21 @@ r300_texture_create_object(struct r300_screen *rscreen,
tex->domain &= ~RADEON_DOMAIN_GTT;
}
/* Just fail if the texture is too large. */
if (!tex->domain) {
goto fail;
}
/* Create the backing buffer if needed. */
if (!tex->buf) {
tex->buf = rws->buffer_create(rws, tex->tex.size_in_bytes, 2048,
- tex->domain, 0);
+ tex->domain, RADEON_FLAG_HANDLE);
if (!tex->buf) {
goto fail;
}
}
if (SCREEN_DBG_ON(rscreen, DBG_MSAA) && base->nr_samples > 1) {
fprintf(stderr, "r300: %ix MSAA %s buffer created\n",
base->nr_samples,
util_format_is_depth_or_stencil(base->format) ? "depth" :
"color");
diff --git a/src/gallium/drivers/radeon/r600_texture.c
b/src/gallium/drivers/radeon/r600_texture.c
index 41fd94b..b6e5880 100644
--- a/src/gallium/drivers/radeon/r600_texture.c
+++ b/src/gallium/drivers/radeon/r600_texture.c
@@ -1105,20 +1105,22 @@ r600_texture_create_object(struct pipe_screen *screen,
rtex->dcc_offset = align64(rtex->size,
rtex->surface.dcc_alignment);
rtex->size = rtex->dcc_offset + rtex->surface.dcc_size;
}
}
/* Now create the backing buffer. */
if (!buf) {
r600_init_resource_fields(rscreen, resource, rtex->size,
rtex->surface.bo_alignment);
+ resource->flags |= RADEON_FLAG_HANDLE;
+
if (!r600_alloc_resource(rscreen, resource)) {
FREE(rtex);
return NULL;
}
} else {
resource->buf = buf;
resource->gpu_address =
rscreen->ws->buffer_get_virtual_address(resource->buf);
resource->domains =
rscreen->ws->buffer_get_initial_domain(resource->buf);
}
diff --git a/src/gallium/drivers/radeon/radeon_winsys.h
b/src/gallium/drivers/radeon/radeon_winsys.h
index 809a203..8196358 100644
--- a/src/gallium/drivers/radeon/radeon_winsys.h
+++ b/src/gallium/drivers/radeon/radeon_winsys.h
@@ -45,20 +45,21 @@ enum radeon_bo_layout {
enum radeon_bo_domain { /* bitfield */
RADEON_DOMAIN_GTT = 2,
RADEON_DOMAIN_VRAM = 4,
RADEON_DOMAIN_VRAM_GTT = RADEON_DOMAIN_VRAM | RADEON_DOMAIN_GTT
};
enum radeon_bo_flag { /* bitfield */
RADEON_FLAG_GTT_WC = (1 << 0),
RADEON_FLAG_CPU_ACCESS = (1 << 1),
RADEON_FLAG_NO_CPU_ACCESS = (1 << 2),
+ RADEON_FLAG_HANDLE = (1 << 3), /* whether get_handle must be
supported */
