radeonsi: unify CP DMA preparation logic

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_cp_dma.c b/src/gallium/drivers/radeonsi/si_cp_dma.c
index 993fb44..2e39a24 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_cp_dma.c
+++ b/src/gallium/drivers/radeonsi/si_cp_dma.c
@@ -122,6 +122,36 @@ static unsigned get_tc_l2_flag(struct si_context *sctx, bool is_framebuffer)
        return is_framebuffer || sctx->b.chip_class == SI ? 0 : CIK_CP_DMA_USE_L2;
 }
 
+static void si_cp_dma_prepare(struct si_context *sctx, struct pipe_resource *dst,
+                             struct pipe_resource *src, unsigned byte_count,
+                             unsigned remaining_size, unsigned *flags)
+{
+       si_need_cs_space(sctx);
+
+       /* This must be done after need_cs_space. */
+       radeon_add_to_buffer_list(&sctx->b, &sctx->b.rings.gfx,
+                                 (struct r600_resource*)dst,
+                                 RADEON_USAGE_WRITE, RADEON_PRIO_CP_DMA);
+       if (src)
+               radeon_add_to_buffer_list(&sctx->b, &sctx->b.rings.gfx,
+                                         (struct r600_resource*)src,
+                                         RADEON_USAGE_READ, RADEON_PRIO_CP_DMA);
+
+       /* Flush the caches for the first copy only.
+        * Also wait for the previous CP DMA operations.
+        */
+       if (sctx->b.flags) {
+               si_emit_cache_flush(sctx, NULL);
+               *flags |= SI_CP_DMA_RAW_WAIT;
+       }
+
+       /* Do the synchronization after the last dma, so that all data
+        * is written to memory.
+        */
+       if (byte_count == remaining_size)
+               *flags |= R600_CP_DMA_SYNC;
+}
+
 /* The max number of bytes to copy per packet. */
 #define CP_DMA_MAX_BYTE_COUNT ((1 << 21) - 8)
 
@@ -162,23 +192,7 @@ static void si_clear_buffer(struct pipe_context *ctx, struct pipe_resource *dst,
                unsigned byte_count = MIN2(size, CP_DMA_MAX_BYTE_COUNT);
                unsigned dma_flags = tc_l2_flag;
 
-               si_need_cs_space(sctx);
-
-               /* This must be done after need_cs_space. */
-               radeon_add_to_buffer_list(&sctx->b, &sctx->b.rings.gfx,
-                                     (struct r600_resource*)dst, RADEON_USAGE_WRITE,
-                                     RADEON_PRIO_CP_DMA);
-
-               /* Flush the caches for the first copy only.
-                * Also wait for the previous CP DMA operations. */
-               if (sctx->b.flags) {
-                       si_emit_cache_flush(sctx, NULL);
-                       dma_flags |= SI_CP_DMA_RAW_WAIT; /* same as WAIT_UNTIL=CP_DMA_IDLE */
-               }
-
-               /* Do the synchronization after the last copy, so that all data is written to memory. */
-               if (size == byte_count)
-                       dma_flags |= R600_CP_DMA_SYNC;
+               si_cp_dma_prepare(sctx, dst, NULL, byte_count, size, &dma_flags);
 
                /* Emit the clear packet. */
                si_emit_cp_dma_clear_buffer(sctx, va, byte_count, value, dma_flags);
@@ -219,29 +233,12 @@ void si_copy_buffer(struct si_context *sctx,
        sctx->b.flags |= SI_CONTEXT_PS_PARTIAL_FLUSH | flush_flags;
 
        while (size) {
-               unsigned sync_flags = tc_l2_flag;
+               unsigned dma_flags = tc_l2_flag;
                unsigned byte_count = MIN2(size, CP_DMA_MAX_BYTE_COUNT);
 
-               si_need_cs_space(sctx);
-
-               /* Flush the caches for the first copy only. Also wait for old CP DMA packets to complete. */
-               if (sctx->b.flags) {
-                       si_emit_cache_flush(sctx, NULL);
-                       sync_flags |= SI_CP_DMA_RAW_WAIT;
-               }
-
-               /* Do the synchronization after the last copy, so that all data is written to memory. */
-               if (size == byte_count) {
-                       sync_flags |= R600_CP_DMA_SYNC;
-               }
-
-               /* This must be done after r600_need_cs_space. */
-               radeon_add_to_buffer_list(&sctx->b, &sctx->b.rings.gfx, (struct r600_resource*)src,
-                                     RADEON_USAGE_READ, RADEON_PRIO_CP_DMA);
-               radeon_add_to_buffer_list(&sctx->b, &sctx->b.rings.gfx, (struct r600_resource*)dst,
-                                     RADEON_USAGE_WRITE, RADEON_PRIO_CP_DMA);
+               si_cp_dma_prepare(sctx, dst, src, byte_count, size, &dma_flags);
 
-               si_emit_cp_dma_copy_buffer(sctx, dst_offset, src_offset, byte_count, sync_flags);
+               si_emit_cp_dma_copy_buffer(sctx, dst_offset, src_offset, byte_count, dma_flags);
 
                size -= byte_count;
                src_offset += byte_count;