diff options
| author | Rob Clark <[email protected]> | 2017-04-17 11:25:29 -0400 |
|---|---|---|
| committer | Rob Clark <[email protected]> | 2017-05-04 13:48:06 -0400 |
| commit | 39c5a46a7a7e46fa84b21e749aa9547733f0c813 (patch) | |
| tree | dfcf1645773d64291c312230d115c091885f3bb9 /src/gallium/drivers/freedreno/freedreno_screen.c | |
| parent | edde00f5f1a1a6b3f9827af0475f6ff097705c1f (diff) | |
freedreno/a5xx: SSBO support
To simplify things for now, since all the gfx shader stages share a
single SSBO state block, only advertise SSBO support for fragment shader
(and compute when we have that). We could possibly use a fixed-
partitioning of the SSBO index space to support SSBOs on other stages
without having to resort to shader variants.
Signed-off-by: Rob Clark <[email protected]>
Diffstat (limited to 'src/gallium/drivers/freedreno/freedreno_screen.c')
| -rw-r--r-- | src/gallium/drivers/freedreno/freedreno_screen.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/src/gallium/drivers/freedreno/freedreno_screen.c b/src/gallium/drivers/freedreno/freedreno_screen.c index 93b434b0bac..15293b1b3be 100644 --- a/src/gallium/drivers/freedreno/freedreno_screen.c +++ b/src/gallium/drivers/freedreno/freedreno_screen.c @@ -250,6 +250,11 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param) return 120; return is_ir3(screen) ? 140 : 120; + case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT: + if (is_a5xx(screen)) + return 4; + return 0; + /* Unsupported features. */ case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT: case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER: @@ -282,7 +287,6 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param) case PIPE_CAP_TGSI_PACK_HALF_FLOAT: case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL: case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL: - case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT: case PIPE_CAP_INVALIDATE_BUFFER: case PIPE_CAP_GENERATE_MIPMAP: case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS: @@ -439,7 +443,7 @@ fd_screen_get_paramf(struct pipe_screen *pscreen, enum pipe_capf param) static int fd_screen_get_shader_param(struct pipe_screen *pscreen, - enum pipe_shader_type shader, + enum pipe_shader_type shader, enum pipe_shader_cap param) { struct fd_screen *screen = fd_screen(pscreen); @@ -518,6 +522,35 @@ fd_screen_get_shader_param(struct pipe_screen *pscreen, case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT: return 32; case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS: + if (is_a5xx(screen)) { + /* a5xx (and a4xx for that matter) has one state-block + * for compute-shader SSBO's and another that is shared + * by VS/HS/DS/GS/FS.. so to simplify things for now + * just advertise SSBOs for FS and CS. We could possibly + * do what blob does, and partition the space for + * VS/HS/DS/GS/FS. The blob advertises: + * + * GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS: 4 + * GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS: 4 + * GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS: 4 + * GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS: 4 + * GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS: 4 + * GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS: 24 + * GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS: 24 + * + * I think that way we could avoid having to patch shaders + * for actual SSBO indexes by using a static partitioning. + */ + switch(shader) + { + case PIPE_SHADER_FRAGMENT: + case PIPE_SHADER_COMPUTE: + return 24; + default: + return 0; + } + } + return 0; case PIPE_SHADER_CAP_MAX_SHADER_IMAGES: case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD: case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS: |