From: Marek Olšák <marek.ol...@amd.com>

also use assertions for the requirements that offset and size are a multiple
of 4.
---
 src/gallium/drivers/radeon/radeon_video.c     |  3 +-
 src/gallium/drivers/radeonsi/cik_sdma.c       | 41 -------------
 src/gallium/drivers/radeonsi/si_cp_dma.c      |  2 +-
 src/gallium/drivers/radeonsi/si_dma.c         | 40 ------------
 src/gallium/drivers/radeonsi/si_dma_cs.c      | 61 ++++++++++++++++++-
 src/gallium/drivers/radeonsi/si_pipe.c        |  2 +-
 src/gallium/drivers/radeonsi/si_pipe.h        |  5 +-
 .../drivers/radeonsi/si_test_dma_perf.c       |  2 +-
 8 files changed, 66 insertions(+), 90 deletions(-)

diff --git a/src/gallium/drivers/radeon/radeon_video.c 
b/src/gallium/drivers/radeon/radeon_video.c
index 749f30c2306..a39ce4cc73e 100644
--- a/src/gallium/drivers/radeon/radeon_video.c
+++ b/src/gallium/drivers/radeon/radeon_video.c
@@ -113,22 +113,21 @@ error:
        si_vid_destroy_buffer(new_buf);
        *new_buf = old_buf;
        return false;
 }
 
 /* clear the buffer with zeros */
 void si_vid_clear_buffer(struct pipe_context *context, struct rvid_buffer* 
buffer)
 {
        struct si_context *sctx = (struct si_context*)context;
 
-       sctx->dma_clear_buffer(sctx, &buffer->res->b.b, 0,
-                              buffer->res->buf->size, 0);
+       si_sdma_clear_buffer(sctx, &buffer->res->b.b, 0, 
buffer->res->buf->size, 0);
        context->flush(context, NULL, 0);
 }
 
 /**
  * join surfaces into the same buffer with identical tiling params
  * sumup their sizes and replace the backend buffers with a single bo
  */
 void si_vid_join_surfaces(struct si_context *sctx,
                          struct pb_buffer** buffers[VL_NUM_COMPONENTS],
                          struct radeon_surf *surfaces[VL_NUM_COMPONENTS])
diff --git a/src/gallium/drivers/radeonsi/cik_sdma.c 
b/src/gallium/drivers/radeonsi/cik_sdma.c
index 595f8d49a80..1c2fd0f7b1c 100644
--- a/src/gallium/drivers/radeonsi/cik_sdma.c
+++ b/src/gallium/drivers/radeonsi/cik_sdma.c
@@ -60,60 +60,20 @@ static void cik_sdma_copy_buffer(struct si_context *ctx,
                radeon_emit(cs, src_offset);
                radeon_emit(cs, src_offset >> 32);
                radeon_emit(cs, dst_offset);
                radeon_emit(cs, dst_offset >> 32);
                dst_offset += csize;
                src_offset += csize;
                size -= csize;
        }
 }
 
-static void cik_sdma_clear_buffer(struct si_context *sctx,
-                                 struct pipe_resource *dst,
-                                 uint64_t offset,
-                                 uint64_t size,
-                                 unsigned clear_value)
-{
-       struct radeon_cmdbuf *cs = sctx->dma_cs;
-       unsigned i, ncopy, csize;
-       struct r600_resource *rdst = r600_resource(dst);
-
-       if (!cs || offset % 4 != 0 || size % 4 != 0 ||
-           dst->flags & PIPE_RESOURCE_FLAG_SPARSE) {
-               sctx->b.clear_buffer(&sctx->b, dst, offset, size, &clear_value, 
4);
-               return;
-       }
-
-       /* Mark the buffer range of destination as valid (initialized),
-        * so that transfer_map knows it should wait for the GPU when mapping
-        * that range. */
-       util_range_add(&rdst->valid_buffer_range, offset, offset + size);
-
-       offset += rdst->gpu_address;
-
-       /* the same maximum size as for copying */
-       ncopy = DIV_ROUND_UP(size, CIK_SDMA_COPY_MAX_SIZE);
-       si_need_dma_space(sctx, ncopy * 5, rdst, NULL);
-
-       for (i = 0; i < ncopy; i++) {
-               csize = MIN2(size, CIK_SDMA_COPY_MAX_SIZE);
-               radeon_emit(cs, CIK_SDMA_PACKET(CIK_SDMA_PACKET_CONSTANT_FILL, 
0,
-                                               0x8000 /* dword copy */));
-               radeon_emit(cs, offset);
-               radeon_emit(cs, offset >> 32);
-               radeon_emit(cs, clear_value);
-               radeon_emit(cs, sctx->chip_class >= GFX9 ? csize - 1 : csize);
-               offset += csize;
-               size -= csize;
-       }
-}
-
 static unsigned minify_as_blocks(unsigned width, unsigned level, unsigned 
blk_w)
 {
        width = u_minify(width, level);
        return DIV_ROUND_UP(width, blk_w);
 }
 
 static unsigned encode_tile_info(struct si_context *sctx,
                                 struct si_texture *tex, unsigned level,
                                 bool set_bpp)
 {
@@ -547,12 +507,11 @@ static void cik_sdma_copy(struct pipe_context *ctx,
                return;
 
 fallback:
        si_resource_copy_region(ctx, dst, dst_level, dstx, dsty, dstz,
                                src, src_level, src_box);
 }
 
 void cik_init_sdma_functions(struct si_context *sctx)
 {
        sctx->dma_copy = cik_sdma_copy;
-       sctx->dma_clear_buffer = cik_sdma_clear_buffer;
 }
diff --git a/src/gallium/drivers/radeonsi/si_cp_dma.c 
b/src/gallium/drivers/radeonsi/si_cp_dma.c
index 486ae75c77f..598d5ecf0dc 100644
--- a/src/gallium/drivers/radeonsi/si_cp_dma.c
+++ b/src/gallium/drivers/radeonsi/si_cp_dma.c
@@ -294,21 +294,21 @@ void si_clear_buffer(struct si_context *sctx, struct 
pipe_resource *dst,
             * alone improves DeusEx:MD performance by 70%. */
            (size > CP_DMA_CLEAR_PERF_THRESHOLD ||
             /* Buffers not used by the GFX IB yet will be cleared by SDMA.
              * This happens to move most buffer clears to SDMA, including
              * DCC and CMASK clears, because pipe->clear clears them before
              * si_emit_framebuffer_state (in a draw call) adds them.
              * For example, DeusEx:MD has 21 buffer clears per frame and all
              * of them are moved to SDMA thanks to this. */
             !ws->cs_is_buffer_referenced(sctx->gfx_cs, rdst->buf,
                                          RADEON_USAGE_READWRITE))) {
-               sctx->dma_clear_buffer(sctx, dst, offset, dma_clear_size, 
value);
+               si_sdma_clear_buffer(sctx, dst, offset, dma_clear_size, value);
 
                offset += dma_clear_size;
                size -= dma_clear_size;
        } else if (dma_clear_size >= 4) {
                si_cp_dma_clear_buffer(sctx, dst, offset, dma_clear_size, value,
                                       coher, cache_policy);
 
                offset += dma_clear_size;
                size -= dma_clear_size;
        }
diff --git a/src/gallium/drivers/radeonsi/si_dma.c 
b/src/gallium/drivers/radeonsi/si_dma.c
index da5bd47b5dd..046d8445ce3 100644
--- a/src/gallium/drivers/radeonsi/si_dma.c
+++ b/src/gallium/drivers/radeonsi/si_dma.c
@@ -70,59 +70,20 @@ static void si_dma_copy_buffer(struct si_context *ctx,
                radeon_emit(cs, dst_offset);
                radeon_emit(cs, src_offset);
                radeon_emit(cs, (dst_offset >> 32UL) & 0xff);
                radeon_emit(cs, (src_offset >> 32UL) & 0xff);
                dst_offset += count;
                src_offset += count;
                size -= count;
        }
 }
 
-static void si_dma_clear_buffer(struct si_context *sctx,
-                               struct pipe_resource *dst,
-                               uint64_t offset,
-                               uint64_t size,
-                               unsigned clear_value)
-{
-       struct radeon_cmdbuf *cs = sctx->dma_cs;
-       unsigned i, ncopy, csize;
-       struct r600_resource *rdst = r600_resource(dst);
-
-       if (!cs || offset % 4 != 0 || size % 4 != 0 ||
-           dst->flags & PIPE_RESOURCE_FLAG_SPARSE) {
-               sctx->b.clear_buffer(&sctx->b, dst, offset, size, &clear_value, 
4);
-               return;
-       }
-
-       /* Mark the buffer range of destination as valid (initialized),
-        * so that transfer_map knows it should wait for the GPU when mapping
-        * that range. */
-       util_range_add(&rdst->valid_buffer_range, offset, offset + size);
-
-       offset += rdst->gpu_address;
-
-       /* the same maximum size as for copying */
-       ncopy = DIV_ROUND_UP(size, SI_DMA_COPY_MAX_DWORD_ALIGNED_SIZE);
-       si_need_dma_space(sctx, ncopy * 4, rdst, NULL);
-
-       for (i = 0; i < ncopy; i++) {
-               csize = MIN2(size, SI_DMA_COPY_MAX_DWORD_ALIGNED_SIZE);
-               radeon_emit(cs, SI_DMA_PACKET(SI_DMA_PACKET_CONSTANT_FILL, 0,
-                                             csize / 4));
-               radeon_emit(cs, offset);
-               radeon_emit(cs, clear_value);
-               radeon_emit(cs, (offset >> 32) << 16);
-               offset += csize;
-               size -= csize;
-       }
-}
-
 static void si_dma_copy_tile(struct si_context *ctx,
                             struct pipe_resource *dst,
                             unsigned dst_level,
                             unsigned dst_x,
                             unsigned dst_y,
                             unsigned dst_z,
                             struct pipe_resource *src,
                             unsigned src_level,
                             unsigned src_x,
                             unsigned src_y,
@@ -318,12 +279,11 @@ static void si_dma_copy(struct pipe_context *ctx,
        return;
 
 fallback:
        si_resource_copy_region(ctx, dst, dst_level, dstx, dsty, dstz,
                                src, src_level, src_box);
 }
 
 void si_init_dma_functions(struct si_context *sctx)
 {
        sctx->dma_copy = si_dma_copy;
-       sctx->dma_clear_buffer = si_dma_clear_buffer;
 }
diff --git a/src/gallium/drivers/radeonsi/si_dma_cs.c 
b/src/gallium/drivers/radeonsi/si_dma_cs.c
index 7db9570af3c..ffa2f5ae69b 100644
--- a/src/gallium/drivers/radeonsi/si_dma_cs.c
+++ b/src/gallium/drivers/radeonsi/si_dma_cs.c
@@ -57,20 +57,79 @@ void si_dma_emit_timestamp(struct si_context *sctx, struct 
r600_resource *dst,
        si_need_dma_space(sctx, 4, dst, NULL);
        si_dma_emit_wait_idle(sctx);
 
        radeon_emit(cs, CIK_SDMA_PACKET(CIK_SDMA_OPCODE_TIMESTAMP,
                                        SDMA_TS_SUB_OPCODE_GET_GLOBAL_TIMESTAMP,
                                        0));
        radeon_emit(cs, va);
        radeon_emit(cs, va >> 32);
 }
 
+void si_sdma_clear_buffer(struct si_context *sctx, struct pipe_resource *dst,
+                         uint64_t offset, uint64_t size, unsigned clear_value)
+{
+       struct radeon_cmdbuf *cs = sctx->dma_cs;
+       unsigned i, ncopy, csize;
+       struct r600_resource *rdst = r600_resource(dst);
+
+       assert(offset % 4 == 0);
+       assert(size);
+       assert(size % 4 == 0);
+
+       if (!cs || dst->flags & PIPE_RESOURCE_FLAG_SPARSE) {
+               sctx->b.clear_buffer(&sctx->b, dst, offset, size, &clear_value, 
4);
+               return;
+       }
+
+       /* Mark the buffer range of destination as valid (initialized),
+        * so that transfer_map knows it should wait for the GPU when mapping
+        * that range. */
+       util_range_add(&rdst->valid_buffer_range, offset, offset + size);
+
+       offset += rdst->gpu_address;
+
+       if (sctx->chip_class == SI) {
+               /* the same maximum size as for copying */
+               ncopy = DIV_ROUND_UP(size, SI_DMA_COPY_MAX_DWORD_ALIGNED_SIZE);
+               si_need_dma_space(sctx, ncopy * 4, rdst, NULL);
+
+               for (i = 0; i < ncopy; i++) {
+                       csize = MIN2(size, SI_DMA_COPY_MAX_DWORD_ALIGNED_SIZE);
+                       radeon_emit(cs, 
SI_DMA_PACKET(SI_DMA_PACKET_CONSTANT_FILL, 0,
+                                                     csize / 4));
+                       radeon_emit(cs, offset);
+                       radeon_emit(cs, clear_value);
+                       radeon_emit(cs, (offset >> 32) << 16);
+                       offset += csize;
+                       size -= csize;
+               }
+               return;
+       }
+
+       /* The following code is for CI, VI, Vega/Raven, etc. */
+       /* the same maximum size as for copying */
+       ncopy = DIV_ROUND_UP(size, CIK_SDMA_COPY_MAX_SIZE);
+       si_need_dma_space(sctx, ncopy * 5, rdst, NULL);
+
+       for (i = 0; i < ncopy; i++) {
+               csize = MIN2(size, CIK_SDMA_COPY_MAX_SIZE);
+               radeon_emit(cs, CIK_SDMA_PACKET(CIK_SDMA_PACKET_CONSTANT_FILL, 
0,
+                                               0x8000 /* dword copy */));
+               radeon_emit(cs, offset);
+               radeon_emit(cs, offset >> 32);
+               radeon_emit(cs, clear_value);
+               radeon_emit(cs, sctx->chip_class >= GFX9 ? csize - 1 : csize);
+               offset += csize;
+               size -= csize;
+       }
+}
+
 void si_need_dma_space(struct si_context *ctx, unsigned num_dw,
                       struct r600_resource *dst, struct r600_resource *src)
 {
        uint64_t vram = ctx->dma_cs->used_vram;
        uint64_t gtt = ctx->dma_cs->used_gart;
 
        if (dst) {
                vram += dst->vram_usage;
                gtt += dst->gart_usage;
        }
@@ -163,14 +222,14 @@ void si_flush_dma_cs(struct si_context *ctx, unsigned 
flags,
                si_clear_saved_cs(&saved);
        }
 }
 
 void si_screen_clear_buffer(struct si_screen *sscreen, struct pipe_resource 
*dst,
                            uint64_t offset, uint64_t size, unsigned value)
 {
        struct si_context *ctx = (struct si_context*)sscreen->aux_context;
 
        mtx_lock(&sscreen->aux_context_lock);
-       ctx->dma_clear_buffer(ctx, dst, offset, size, value);
+       si_sdma_clear_buffer(ctx, dst, offset, size, value);
        sscreen->aux_context->flush(sscreen->aux_context, NULL, 0);
        mtx_unlock(&sscreen->aux_context_lock);
 }
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c 
b/src/gallium/drivers/radeonsi/si_pipe.c
index c259c260550..bce7b3f550e 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -728,21 +728,21 @@ static void si_test_vmfault(struct si_screen *sscreen)
        }
 
        r600_resource(buf)->gpu_address = 0; /* cause a VM fault */
 
        if (sscreen->debug_flags & DBG(TEST_VMFAULT_CP)) {
                si_copy_buffer(sctx, buf, buf, 0, 4, 4, 0, -1);
                ctx->flush(ctx, NULL, 0);
                puts("VM fault test: CP - done.");
        }
        if (sscreen->debug_flags & DBG(TEST_VMFAULT_SDMA)) {
-               sctx->dma_clear_buffer(sctx, buf, 0, 4, 0);
+               si_sdma_clear_buffer(sctx, buf, 0, 4, 0);
                ctx->flush(ctx, NULL, 0);
                puts("VM fault test: SDMA - done.");
        }
        if (sscreen->debug_flags & DBG(TEST_VMFAULT_SHADER)) {
                util_test_constant_buffer(ctx, buf);
                puts("VM fault test: Shader - done.");
        }
        exit(0);
 }
 
diff --git a/src/gallium/drivers/radeonsi/si_pipe.h 
b/src/gallium/drivers/radeonsi/si_pipe.h
index ef4f06f41d5..a6f09b65f74 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.h
+++ b/src/gallium/drivers/radeonsi/si_pipe.h
@@ -1022,23 +1022,20 @@ struct si_context {
 
        /* Copy one resource to another using async DMA. */
        void (*dma_copy)(struct pipe_context *ctx,
                         struct pipe_resource *dst,
                         unsigned dst_level,
                         unsigned dst_x, unsigned dst_y, unsigned dst_z,
                         struct pipe_resource *src,
                         unsigned src_level,
                         const struct pipe_box *src_box);
 
-       void (*dma_clear_buffer)(struct si_context *sctx, struct pipe_resource 
*dst,
-                                uint64_t offset, uint64_t size, unsigned 
value);
-
        struct si_tracked_regs                  tracked_regs;
 };
 
 /* cik_sdma.c */
 void cik_init_sdma_functions(struct si_context *sctx);
 
 /* si_blit.c */
 enum si_blitter_op /* bitmask */
 {
        SI_SAVE_TEXTURES      = 1,
@@ -1152,20 +1149,22 @@ void si_init_debug_functions(struct si_context *sctx);
 void si_check_vm_faults(struct si_context *sctx,
                        struct radeon_saved_cs *saved, enum ring_type ring);
 bool si_replace_shader(unsigned num, struct ac_shader_binary *binary);
 
 /* si_dma.c */
 void si_init_dma_functions(struct si_context *sctx);
 
 /* si_dma_cs.c */
 void si_dma_emit_timestamp(struct si_context *sctx, struct r600_resource *dst,
                           uint64_t offset);
+void si_sdma_clear_buffer(struct si_context *sctx, struct pipe_resource *dst,
+                         uint64_t offset, uint64_t size, unsigned clear_value);
 void si_need_dma_space(struct si_context *ctx, unsigned num_dw,
                       struct r600_resource *dst, struct r600_resource *src);
 void si_flush_dma_cs(struct si_context *ctx, unsigned flags,
                     struct pipe_fence_handle **fence);
 void si_screen_clear_buffer(struct si_screen *sscreen, struct pipe_resource 
*dst,
                            uint64_t offset, uint64_t size, unsigned value);
 
 /* si_fence.c */
 void si_gfx_write_event_eop(struct si_context *ctx,
                            unsigned event, unsigned event_flags,
diff --git a/src/gallium/drivers/radeonsi/si_test_dma_perf.c 
b/src/gallium/drivers/radeonsi/si_test_dma_perf.c
index be2ad079e1a..f097a642999 100644
--- a/src/gallium/drivers/radeonsi/si_test_dma_perf.c
+++ b/src/gallium/drivers/radeonsi/si_test_dma_perf.c
@@ -184,21 +184,21 @@ void si_test_dma_perf(struct si_screen *sscreen)
                                                        
si_cp_dma_clear_buffer(sctx, dst, 0, size, clear_value,
                                                                               
SI_COHERENCY_NONE, cache_policy);
                                                }
                                        } else if (test_sdma) {
                                                /* SDMA */
                                                if (is_copy) {
                                                        struct pipe_box box;
                                                        u_box_1d(0, size, &box);
                                                        sctx->dma_copy(ctx, 
dst, 0, 0, 0, 0, src, 0, &box);
                                                } else {
-                                                       
sctx->dma_clear_buffer(sctx, dst, 0, size, clear_value);
+                                                       
si_sdma_clear_buffer(sctx, dst, 0, size, clear_value);
                                                }
                                        } else {
                                                /* Compute */
                                                /* The memory accesses are 
coalesced, meaning that the 1st instruction writes
                                                 * the 1st contiguous block of 
data for the whole wave, the 2nd instruction
                                                 * writes the 2nd contiguous 
block of data, etc.
                                                 */
                                                unsigned 
instructions_per_thread = MAX2(1, cs_dwords_per_thread / 4);
                                                unsigned dwords_per_instruction 
= cs_dwords_per_thread / instructions_per_thread;
                                                unsigned dwords_per_wave = 
cs_dwords_per_thread * 64;
-- 
2.17.1

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