[Intel-gfx] [PATCH 1/2] rendercopy/bdw: Enable hw-generated binding tables
Ville Syrjälä
ville.syrjala at linux.intel.com
Tue May 6 23:38:04 CEST 2014
On Tue, May 06, 2014 at 10:48:02PM +0300, Abdiel Janulgue wrote:
> Use on-chip hw-binding table generator to generate binding
> tables when the test emits SURFACE_STATES packets. The hw generates
> these binding table packets internally so we don't have to
> allocate space on the batchbuffer.
>
> Signed-off-by: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>
> ---
> lib/gen8_render.h | 13 +++++++
> lib/intel_batchbuffer.c | 12 ++++++
> lib/intel_batchbuffer.h | 3 ++
> lib/intel_reg.h | 3 ++
> lib/rendercopy_gen8.c | 97 ++++++++++++++++++++++++++++++++++++++++++++---
> 5 files changed, 123 insertions(+), 5 deletions(-)
>
> diff --git a/lib/gen8_render.h b/lib/gen8_render.h
> index fffc100..4d5f7ba 100644
> --- a/lib/gen8_render.h
> +++ b/lib/gen8_render.h
> @@ -83,6 +83,19 @@
> /* Random shifts */
> #define GEN8_3DSTATE_PS_MAX_THREADS_SHIFT 23
>
> +/* GEN8+ resource streamer */
> +#define GEN8_3DSTATE_BINDING_TABLE_POOL_ALLOC (0x7919 << 16) /* GEN8 */
> +# define BINDING_TABLE_POOL_ENABLE 0x0800
> +#define GEN8_3DSTATE_BINDING_TABLE_EDIT_VS (0x7843 << 16) /* GEN8 */
> +#define GEN8_3DSTATE_BINDING_TABLE_EDIT_GS (0x7844 << 16) /* GEN8 */
> +#define GEN8_3DSTATE_BINDING_TABLE_EDIT_HS (0x7845 << 16) /* GEN8 */
> +#define GEN8_3DSTATE_BINDING_TABLE_EDIT_DS (0x7846 << 16) /* GEN8 */
> +#define GEN8_3DSTATE_BINDING_TABLE_EDIT_PS (0x7847 << 16) /* GEN8 */
> +
> +/* Toggling RS needs PIPE_CONTROL SC invalidate */
> +#define _3DSTATE_PIPE_CONTROL ((0x3 << 29) | (3 << 27) | (2 << 24))
> +#define PIPE_CONTROL_STATE_CACHE_INVALIDATE (1 << 2)
> +
> /* Shamelessly ripped from mesa */
> struct gen8_surface_state
> {
> diff --git a/lib/intel_batchbuffer.c b/lib/intel_batchbuffer.c
> index e868922..26c9b89 100644
> --- a/lib/intel_batchbuffer.c
> +++ b/lib/intel_batchbuffer.c
> @@ -81,6 +81,14 @@ intel_batchbuffer_reset(struct intel_batchbuffer *batch)
> memset(batch->buffer, 0, sizeof(batch->buffer));
>
> batch->ptr = batch->buffer;
> +
> + if (batch->hw_bt_pool_bo != NULL) {
> + drm_intel_bo_unreference(batch->hw_bt_pool_bo);
> + batch->hw_bt_pool_bo = NULL;
> + }
> +
> + batch->hw_bt_pool_bo = drm_intel_bo_alloc(batch->bufmgr, "hw_bt",
> + 131072, 4096);
> }
>
> /**
> @@ -116,6 +124,10 @@ intel_batchbuffer_free(struct intel_batchbuffer *batch)
> {
> drm_intel_bo_unreference(batch->bo);
> batch->bo = NULL;
> +
> + drm_intel_bo_unreference(batch->hw_bt_pool_bo);
> + batch->hw_bt_pool_bo = NULL;
> +
> free(batch);
> }
>
> diff --git a/lib/intel_batchbuffer.h b/lib/intel_batchbuffer.h
> index 49dbcf0..2a516bc 100644
> --- a/lib/intel_batchbuffer.h
> +++ b/lib/intel_batchbuffer.h
> @@ -18,6 +18,9 @@ struct intel_batchbuffer {
> uint8_t buffer[BATCH_SZ];
> uint8_t *ptr;
> uint8_t *state;
> +
> + drm_intel_bo *hw_bt_pool_bo;
> + int use_resource_streamer;
> };
>
> struct intel_batchbuffer *intel_batchbuffer_alloc(drm_intel_bufmgr *bufmgr,
> diff --git a/lib/intel_reg.h b/lib/intel_reg.h
> index 4b3a102..1cb9a29 100644
> --- a/lib/intel_reg.h
> +++ b/lib/intel_reg.h
> @@ -2560,6 +2560,9 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
> #define MI_BATCH_NON_SECURE (1)
> #define MI_BATCH_NON_SECURE_I965 (1 << 8)
>
> +/* Resource Streamer */
> +#define MI_RS_CONTROL (0x6 << 23)
> +
> #define MAX_DISPLAY_PIPES 2
>
> typedef enum {
> diff --git a/lib/rendercopy_gen8.c b/lib/rendercopy_gen8.c
> index 6f5a698..b0dd0f3 100644
> --- a/lib/rendercopy_gen8.c
> +++ b/lib/rendercopy_gen8.c
> @@ -169,12 +169,14 @@ static void
> gen6_render_flush(struct intel_batchbuffer *batch,
> drm_intel_context *context, uint32_t batch_end)
> {
> - int ret;
> + int ret = 0;
> + uint32_t flags = 0;
>
> ret = drm_intel_bo_subdata(batch->bo, 0, 4096, batch->buffer);
> + flags = batch->use_resource_streamer ? I915_EXEC_RESOURCE_STREAMER : 0;
> if (ret == 0)
> ret = drm_intel_gem_bo_context_exec(batch->bo, context,
> - batch_end, 0);
> + batch_end, flags | I915_EXEC_RENDER);
> assert(ret == 0);
> }
>
> @@ -228,18 +230,83 @@ gen8_bind_buf(struct intel_batchbuffer *batch, struct igt_buf *buf,
> return offset;
> }
>
> +static void
> +gen8_hw_binding_table(struct intel_batchbuffer *batch, bool enable)
> +{
> + if (!enable) {
> + OUT_BATCH(MI_RS_CONTROL | 0x0);
> +
> + OUT_BATCH(GEN8_3DSTATE_BINDING_TABLE_POOL_ALLOC | (4 - 2));
> + /* binding table pool base address */
> + OUT_BATCH(0);
> + OUT_BATCH(0);
> + /* Upper bound */
> + OUT_BATCH(0);
> +
WaCsStallBeforeStateCacheInvalidate says you need to emit another
PIPE_CONTROL here with CS stall bit set. And thanks to the other
restrictions that PIPE_CONTORL needs one of the other magic bits also
set. Stall at scoreboard perhaps? I think that's what we set in the
kernel usually.
> + OUT_BATCH(_3DSTATE_PIPE_CONTROL | (6 - 2));
> + OUT_BATCH(PIPE_CONTROL_STATE_CACHE_INVALIDATE);
> + OUT_BATCH(0);
> + OUT_BATCH(0);
> + OUT_BATCH(0);
> + OUT_BATCH(0);
> +
> + return;
> + }
> + OUT_BATCH(GEN8_3DSTATE_BINDING_TABLE_POOL_ALLOC | (4 - 2));
> +
> + /* binding table pool base address */
> + OUT_RELOC(batch->hw_bt_pool_bo, I915_GEM_DOMAIN_SAMPLER, 0,
> + BINDING_TABLE_POOL_ENABLE);
> + OUT_BATCH(0);
I suppose it doesn't matter much which domain we use here. But the
hardware writes to the BT pool so maybe you should set write domain
as well?
> +
> + /* Upper bound */
> + OUT_RELOC(batch->hw_bt_pool_bo, I915_GEM_DOMAIN_SAMPLER, 0,
> + batch->hw_bt_pool_bo->size);
AFAICS on bdw this should be just the bt pool size and not a reloc.
> +
Again need another CS stall PIPE_CONTROL.
> + OUT_BATCH(_3DSTATE_PIPE_CONTROL | (6 - 2));
> + OUT_BATCH(PIPE_CONTROL_STATE_CACHE_INVALIDATE);
> + OUT_BATCH(0);
> + OUT_BATCH(0);
> + OUT_BATCH(0);
> + OUT_BATCH(0);
> +}
> +
> +static uint32_t
> +gen8_rs_bind_surfaces(struct intel_batchbuffer *batch,
> + struct igt_buf *src,
> + struct igt_buf *dst,
> + uint32_t *surf0, uint32_t *surf1)
> +{
> + *surf0 = gen8_bind_buf(batch, dst, GEN6_SURFACEFORMAT_B8G8R8A8_UNORM, 1);
> + *surf1 = gen8_bind_buf(batch, src, GEN6_SURFACEFORMAT_B8G8R8A8_UNORM, 0);
> +
> + return 0;
> +}
> +
> +static void
> +gen8_rs_edit_surfaces(struct intel_batchbuffer *batch,
> + uint32_t surf0, uint32_t surf1)
> +{
> + OUT_BATCH(GEN8_3DSTATE_BINDING_TABLE_EDIT_PS | (4 - 2));
> + OUT_BATCH(0x3);
So I take it there's no need to clear the entries first?
> + {
> + OUT_BATCH(0 << 16 | surf0 >> 6);
> + OUT_BATCH(1 << 16 | surf1 >> 6);
> + }
> +}
> +
> static uint32_t
> gen8_bind_surfaces(struct intel_batchbuffer *batch,
> struct igt_buf *src,
> struct igt_buf *dst)
> {
> - uint32_t *binding_table, offset;
> + uint32_t offset = 0;
> + uint32_t *binding_table;
>
> binding_table = batch_alloc(batch, 8, 32);
> offset = batch_offset(batch, binding_table);
> annotation_add_state(&aub_annotations, AUB_TRACE_BINDING_TABLE,
> offset, 8);
> -
> binding_table[0] =
> gen8_bind_buf(batch, dst, GEN6_SURFACEFORMAT_B8G8R8A8_UNORM, 1);
> binding_table[1] =
> @@ -512,6 +579,9 @@ gen7_emit_push_constants(struct intel_batchbuffer *batch) {
>
> static void
> gen8_emit_state_base_address(struct intel_batchbuffer *batch) {
> + if (batch->use_resource_streamer)
> + OUT_BATCH(MI_RS_CONTROL | 0x0);
> +
> OUT_BATCH(GEN6_STATE_BASE_ADDRESS | (16 - 2));
>
> /* general */
> @@ -546,6 +616,9 @@ gen8_emit_state_base_address(struct intel_batchbuffer *batch) {
> OUT_BATCH(0xfffff000 | 1);
> /* intruction buffer size */
> OUT_BATCH(1 << 12 | 1);
> +
> + if (batch->use_resource_streamer)
> + OUT_BATCH(MI_RS_CONTROL | 0x1);
> }
>
> static void
> @@ -918,6 +991,7 @@ void gen8_render_copyfunc(struct intel_batchbuffer *batch,
> uint32_t scissor_state;
> uint32_t vertex_buffer;
> uint32_t batch_end;
> + uint32_t surf0 = 0, surf1 = 1;
>
> intel_batchbuffer_flush_with_context(batch, context);
>
> @@ -927,7 +1001,11 @@ void gen8_render_copyfunc(struct intel_batchbuffer *batch,
>
> annotation_init(&aub_annotations);
>
> - ps_binding_table = gen8_bind_surfaces(batch, src, dst);
> + if (batch->use_resource_streamer)
> + ps_binding_table = gen8_rs_bind_surfaces(batch, src, dst,
> + &surf0, &surf1);
> + else
> + ps_binding_table = gen8_bind_surfaces(batch, src, dst);
> ps_sampler_state = gen8_create_sampler(batch);
> ps_kernel_off = gen8_fill_ps(batch, ps_kernel, sizeof(ps_kernel));
> vertex_buffer = gen7_fill_vertex_buffer_data(batch, src,
> @@ -955,6 +1033,9 @@ void gen8_render_copyfunc(struct intel_batchbuffer *batch,
>
> gen8_emit_state_base_address(batch);
>
> + if (batch->use_resource_streamer)
> + gen8_hw_binding_table(batch, true);
> +
> OUT_BATCH(GEN7_3DSTATE_VIEWPORT_STATE_POINTERS_CC);
> OUT_BATCH(viewport.cc_state);
> OUT_BATCH(GEN7_3DSTATE_VIEWPORT_STATE_POINTERS_SF_CLIP);
> @@ -978,6 +1059,9 @@ void gen8_render_copyfunc(struct intel_batchbuffer *batch,
>
> gen8_emit_sf(batch);
>
> + if (batch->use_resource_streamer)
> + gen8_rs_edit_surfaces(batch, surf0, surf1);
> +
> OUT_BATCH(GEN7_3DSTATE_BINDING_TABLE_POINTERS_PS);
> OUT_BATCH(ps_binding_table);
>
> @@ -1001,6 +1085,9 @@ void gen8_render_copyfunc(struct intel_batchbuffer *batch,
> gen8_emit_vf_topology(batch);
> gen8_emit_primitive(batch, vertex_buffer);
>
> + if (batch->use_resource_streamer)
> + gen8_hw_binding_table(batch, false);
> +
> OUT_BATCH(MI_BATCH_BUFFER_END);
>
> batch_end = batch_align(batch, 8);
> --
> 1.7.9.5
>
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--
Ville Syrjälä
Intel OTC
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