From: Michel Dänzer <michel.daen...@amd.com>

Just enough to support an additional internal constant buffer for the user
clip planes.

NOTE: This is a candidate for the 9.1 branch.
Signed-off-by: Michel Dänzer <michel.daen...@amd.com>
---
 src/gallium/drivers/radeonsi/r600_buffer.c   | 30 -----------
 src/gallium/drivers/radeonsi/radeonsi_pipe.h |  8 +++
 src/gallium/drivers/radeonsi/si_state.c      | 81 +++++++++++++---------------
 src/gallium/drivers/radeonsi/si_state_draw.c | 73 +++++++++++++++++++++++++
 4 files changed, 119 insertions(+), 73 deletions(-)

diff --git a/src/gallium/drivers/radeonsi/r600_buffer.c 
b/src/gallium/drivers/radeonsi/r600_buffer.c
index 0c33c1e..cdf9988 100644
--- a/src/gallium/drivers/radeonsi/r600_buffer.c
+++ b/src/gallium/drivers/radeonsi/r600_buffer.c
@@ -24,7 +24,6 @@
  *      Jerome Glisse
  *      Corbin Simpson <mostawesomed...@gmail.com>
  */
-#include <byteswap.h>
 
 #include "pipe/p_screen.h"
 #include "util/u_format.h"
@@ -169,32 +168,3 @@ void r600_upload_index_buffer(struct r600_context *rctx,
        u_upload_data(rctx->uploader, 0, count * ib->index_size,
                      ib->user_buffer, &ib->offset, &ib->buffer);
 }
-
-void r600_upload_const_buffer(struct r600_context *rctx, struct si_resource 
**rbuffer,
-                             const uint8_t *ptr, unsigned size,
-                             uint32_t *const_offset)
-{
-       *rbuffer = NULL;
-
-       if (R600_BIG_ENDIAN) {
-               uint32_t *tmpPtr;
-               unsigned i;
-
-               if (!(tmpPtr = malloc(size))) {
-                       R600_ERR("Failed to allocate BE swap buffer.\n");
-                       return;
-               }
-
-               for (i = 0; i < size / 4; ++i) {
-                       tmpPtr[i] = bswap_32(((uint32_t *)ptr)[i]);
-               }
-
-               u_upload_data(rctx->uploader, 0, size, tmpPtr, const_offset,
-                             (struct pipe_resource**)rbuffer);
-
-               free(tmpPtr);
-       } else {
-               u_upload_data(rctx->uploader, 0, size, ptr, const_offset,
-                             (struct pipe_resource**)rbuffer);
-       }
-}
diff --git a/src/gallium/drivers/radeonsi/radeonsi_pipe.h 
b/src/gallium/drivers/radeonsi/radeonsi_pipe.h
index c5b33f7..e50088f 100644
--- a/src/gallium/drivers/radeonsi/radeonsi_pipe.h
+++ b/src/gallium/drivers/radeonsi/radeonsi_pipe.h
@@ -124,6 +124,13 @@ struct r600_fence_block {
 #define R600_CONSTANT_ARRAY_SIZE 256
 #define R600_RESOURCE_ARRAY_SIZE 160
 
+struct r600_constbuf_state
+{
+       struct pipe_constant_buffer     cb[2];
+       uint32_t                        enabled_mask;
+       uint32_t                        dirty_mask;
+};
+
 struct r600_context {
        struct pipe_context             context;
        struct blitter_context          *blitter;
@@ -152,6 +159,7 @@ struct r600_context {
        /* shader information */
        unsigned                        sprite_coord_enable;
        unsigned                        export_16bpc;
+       struct r600_constbuf_state      constbuf_state[PIPE_SHADER_TYPES];
        struct r600_textures_info       vs_samplers;
        struct r600_textures_info       ps_samplers;
        struct si_resource              *border_color_table;
diff --git a/src/gallium/drivers/radeonsi/si_state.c 
b/src/gallium/drivers/radeonsi/si_state.c
index 6d072ef..de86b1e 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -24,12 +24,15 @@
  *      Christian König <christian.koe...@amd.com>
  */
 
+#include <byteswap.h>
+
 #include "util/u_memory.h"
 #include "util/u_framebuffer.h"
 #include "util/u_blitter.h"
 #include "util/u_helpers.h"
 #include "util/u_math.h"
 #include "util/u_pack_color.h"
+#include "util/u_upload_mgr.h"
 #include "util/u_format_s3tc.h"
 #include "tgsi/tgsi_parse.h"
 #include "radeonsi_pipe.h"
@@ -2492,64 +2495,56 @@ static void si_delete_sampler_state(struct pipe_context 
*ctx, void *state)
  * Constants
  */
 static void si_set_constant_buffer(struct pipe_context *ctx, uint shader, uint 
index,
-                                  struct pipe_constant_buffer *cb)
+                                  struct pipe_constant_buffer *input)
 {
        struct r600_context *rctx = (struct r600_context *)ctx;
-       struct si_resource *rbuffer = cb ? si_resource(cb->buffer) : NULL;
-       struct si_pm4_state *pm4;
-       uint32_t offset;
-       uint64_t va;
+       struct r600_constbuf_state *state = &rctx->constbuf_state[shader];
+       struct pipe_constant_buffer *cb;
+       const uint8_t *ptr;
 
        /* Note that the state tracker can unbind constant buffers by
         * passing NULL here.
         */
-       if (cb == NULL || (!cb->buffer && !cb->user_buffer))
+       if (unlikely(!input || (!input->buffer && !input->user_buffer))) {
+               state->enabled_mask &= ~(1 << index);
+               state->dirty_mask &= ~(1 << index);
+               pipe_resource_reference(&state->cb[index].buffer, NULL);
                return;
+       }
 
-       pm4 = CALLOC_STRUCT(si_pm4_state);
-       si_pm4_inval_shader_cache(pm4);
-
-       if (cb->user_buffer)
-               r600_upload_const_buffer(rctx, &rbuffer, cb->user_buffer, 
cb->buffer_size, &offset);
-       else
-               offset = 0;
-       va = r600_resource_va(ctx->screen, (void*)rbuffer);
-       va += offset;
+       cb = &state->cb[index];
+       cb->buffer_size = input->buffer_size;
 
-       si_pm4_add_bo(pm4, rbuffer, RADEON_USAGE_READ);
+       ptr = input->user_buffer;
 
-       si_pm4_sh_data_begin(pm4);
+       if (ptr) {
+               /* Upload the user buffer. */
+               if (R600_BIG_ENDIAN) {
+                       uint32_t *tmpPtr;
+                       unsigned i, size = input->buffer_size;
 
-       /* Fill in a T# buffer resource description */
-       si_pm4_sh_data_add(pm4, va);
-       si_pm4_sh_data_add(pm4, (S_008F04_BASE_ADDRESS_HI(va >> 32) |
-                                S_008F04_STRIDE(0)));
-       si_pm4_sh_data_add(pm4, cb->buffer_size);
-       si_pm4_sh_data_add(pm4, S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) |
-                               S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) |
-                               S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) |
-                               S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) |
-                               
S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) |
-                               
S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32));
-
-       switch (shader) {
-       case PIPE_SHADER_VERTEX:
-               si_pm4_sh_data_end(pm4, R_00B130_SPI_SHADER_USER_DATA_VS_0, 
SI_SGPR_CONST);
-               si_pm4_set_state(rctx, vs_const, pm4);
-               break;
+                       if (!(tmpPtr = malloc(size))) {
+                               R600_ERR("Failed to allocate BE swap 
buffer.\n");
+                               return;
+                       }
 
-       case PIPE_SHADER_FRAGMENT:
-               si_pm4_sh_data_end(pm4, R_00B030_SPI_SHADER_USER_DATA_PS_0, 
SI_SGPR_CONST);
-               si_pm4_set_state(rctx, ps_const, pm4);
-               break;
+                       for (i = 0; i < size / 4; ++i) {
+                               tmpPtr[i] = bswap_32(((uint32_t *)ptr)[i]);
+                       }
 
-       default:
-               R600_ERR("unsupported %d\n", shader);
-               FREE(pm4);
+                       u_upload_data(rctx->uploader, 0, size, tmpPtr, 
&cb->buffer_offset, &cb->buffer);
+                       free(tmpPtr);
+               } else {
+                       u_upload_data(rctx->uploader, 0, input->buffer_size, 
ptr, &cb->buffer_offset, &cb->buffer);
+               }
+       } else {
+               /* Setup the hw buffer. */
+               cb->buffer_offset = input->buffer_offset;
+               pipe_resource_reference(&cb->buffer, input->buffer);
        }
 
-       if (cb->buffer != &rbuffer->b.b)
-               si_resource_reference(&rbuffer, NULL);
+       state->enabled_mask |= 1 << index;
+       state->dirty_mask |= 1 << index;
 }
 
 /*
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c 
b/src/gallium/drivers/radeonsi/si_state_draw.c
index a9ecc64..1c63b14 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -431,6 +431,78 @@ static void si_update_derived_state(struct r600_context 
*rctx)
        }
 }
 
+static void si_constant_buffer_update(struct r600_context *rctx)
+{
+       struct pipe_context *ctx = &rctx->context;
+       struct si_pm4_state *pm4;
+       unsigned shader, i;
+       uint64_t va;
+
+       if (!rctx->constbuf_state[PIPE_SHADER_VERTEX].dirty_mask &&
+           !rctx->constbuf_state[PIPE_SHADER_FRAGMENT].dirty_mask)
+               return;
+
+       for (shader = PIPE_SHADER_VERTEX ; shader <= PIPE_SHADER_FRAGMENT; 
shader++) {
+               struct r600_constbuf_state *state = 
&rctx->constbuf_state[shader];
+
+               pm4 = CALLOC_STRUCT(si_pm4_state);
+               if (!pm4)
+                       continue;
+
+               si_pm4_inval_shader_cache(pm4);
+               si_pm4_sh_data_begin(pm4);
+
+               for (i = 0; i < 2; i++) {
+                       if (state->enabled_mask & (1 << i)) {
+                               struct pipe_constant_buffer *cb = &state->cb[i];
+                               struct si_resource *rbuffer = 
si_resource(cb->buffer);
+
+                               va = r600_resource_va(ctx->screen, 
(void*)rbuffer);
+                               va += cb->buffer_offset;
+
+                               si_pm4_add_bo(pm4, rbuffer, RADEON_USAGE_READ);
+
+                               /* Fill in a T# buffer resource description */
+                               si_pm4_sh_data_add(pm4, va);
+                               si_pm4_sh_data_add(pm4, 
(S_008F04_BASE_ADDRESS_HI(va >> 32) |
+                                                        S_008F04_STRIDE(0)));
+                               si_pm4_sh_data_add(pm4, cb->buffer_size);
+                               si_pm4_sh_data_add(pm4, 
S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) |
+                                                  
S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) |
+                                                  
S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) |
+                                                  
S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) |
+                                                  
S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) |
+                                                  
S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32));
+                       } else {
+                               /* Fill in an empty T# buffer resource 
description */
+                               si_pm4_sh_data_add(pm4, 0);
+                               si_pm4_sh_data_add(pm4, 0);
+                               si_pm4_sh_data_add(pm4, 0);
+                               si_pm4_sh_data_add(pm4, 0);
+                       }
+               }
+
+               switch (shader) {
+               case PIPE_SHADER_VERTEX:
+                       si_pm4_sh_data_end(pm4, 
R_00B130_SPI_SHADER_USER_DATA_VS_0, SI_SGPR_CONST);
+                       si_pm4_set_state(rctx, vs_const, pm4);
+                       break;
+
+               case PIPE_SHADER_FRAGMENT:
+                       si_pm4_sh_data_end(pm4, 
R_00B030_SPI_SHADER_USER_DATA_PS_0, SI_SGPR_CONST);
+                       si_pm4_set_state(rctx, ps_const, pm4);
+                       break;
+
+               default:
+                       R600_ERR("unsupported %d\n", shader);
+                       FREE(pm4);
+                       return;
+               }
+
+               state->dirty_mask = 0;
+       }
+}
+
 static void si_vertex_buffer_update(struct r600_context *rctx)
 {
        struct pipe_context *ctx = &rctx->context;
@@ -555,6 +627,7 @@ void si_draw_vbo(struct pipe_context *ctx, const struct 
pipe_draw_info *info)
                return;
 
        si_update_derived_state(rctx);
+       si_constant_buffer_update(rctx);
        si_vertex_buffer_update(rctx);
 
        if (info->indexed) {
-- 
1.8.3.rc1

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