softpipe: handle vertex texture sampling when using llvm for draw

Pretty trivial, just fill in the offsets and such. The implementation
is near 100% copy and paste from llvmpipe. Should be useful for debugging.

No piglit change when not using SOFTPIPE_USE_LLVM=1.
Now that it can do the same tests with and without using llvm for vs/gs,
with llvm more pass, the only things failing only with llvm seems to be
edgeflags tests and vs/gs-pow-float-float (and for the latter I'm not
convinced the zero tolerance it requires is somehow mandated by glsl).

Reviewed-by: Jose Fonseca <[email protected]>

7 files changed, 207 insertions, 34 deletions

diff --git a/src/gallium/drivers/softpipe/sp_context.h b/src/gallium/drivers/softpipe/sp_context.h
index aac35f7bf58..50a73369c1d 100644
--- a/src/gallium/drivers/softpipe/sp_context.h
+++ b/src/gallium/drivers/softpipe/sp_context.h
@@ -85,6 +85,8 @@ struct softpipe_context {
    struct pipe_viewport_state viewport;
    struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
    struct pipe_index_buffer index_buffer;
+   struct pipe_resource *mapped_vs_tex[PIPE_MAX_SHADER_SAMPLER_VIEWS];
+   struct pipe_resource *mapped_gs_tex[PIPE_MAX_SHADER_SAMPLER_VIEWS];
 
    struct draw_so_target *so_targets[PIPE_MAX_SO_BUFFERS];
    unsigned num_so_targets;
diff --git a/src/gallium/drivers/softpipe/sp_draw_arrays.c b/src/gallium/drivers/softpipe/sp_draw_arrays.c
index b75c10f3f05..03fcf64fd2e 100644
--- a/src/gallium/drivers/softpipe/sp_draw_arrays.c
+++ b/src/gallium/drivers/softpipe/sp_draw_arrays.c
@@ -41,6 +41,7 @@
 #include "sp_query.h"
 #include "sp_state.h"
 #include "sp_texture.h"
+#include "sp_screen.h"
 
 #include "draw/draw_context.h"
 
@@ -123,6 +124,15 @@ softpipe_draw_vbo(struct pipe_context *pipe,
    draw_set_mapped_so_targets(draw, sp->num_so_targets,
                               sp->so_targets);
 
+   if (softpipe_screen(sp->pipe.screen)->use_llvm) {
+      softpipe_prepare_vertex_sampling(sp,
+                                       sp->num_sampler_views[PIPE_SHADER_VERTEX],
+                                       sp->sampler_views[PIPE_SHADER_VERTEX]);
+      softpipe_prepare_geometry_sampling(sp,
+                                         sp->num_sampler_views[PIPE_SHADER_GEOMETRY],
+                                         sp->sampler_views[PIPE_SHADER_GEOMETRY]);
+   }
+
    if (sp->gs && !sp->gs->shader.tokens) {
       /* we have an empty geometry shader with stream output, so
          attach the stream output info to the current vertex shader */
@@ -146,6 +156,11 @@ softpipe_draw_vbo(struct pipe_context *pipe,
 
    draw_set_mapped_so_targets(draw, 0, NULL);
 
+   if (softpipe_screen(sp->pipe.screen)->use_llvm) {
+      softpipe_cleanup_vertex_sampling(sp);
+      softpipe_cleanup_geometry_sampling(sp);
+   }
+
    /*
     * TODO: Flush only when a user vertex/index buffer is present
     * (or even better, modify draw module to do this
diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
index f6fddfe66c1..956d59c02ba 100644
--- a/src/gallium/drivers/softpipe/sp_screen.c
+++ b/src/gallium/drivers/softpipe/sp_screen.c
@@ -242,20 +242,10 @@ softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe
       return tgsi_exec_get_shader_param(param);
    case PIPE_SHADER_VERTEX:
    case PIPE_SHADER_GEOMETRY:
-      switch (param) {
-      case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
-      case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
-         if (sp_screen->use_llvm)
-            /* Softpipe doesn't yet know how to tell draw/llvm about textures */
-            return 0;
-         else
-            return PIPE_MAX_SAMPLERS;
-      default:
-         if (sp_screen->use_llvm)
-            return draw_get_shader_param(shader, param);
-         else
-            return draw_get_shader_param_no_llvm(shader, param);
-      }
+      if (sp_screen->use_llvm)
+         return draw_get_shader_param(shader, param);
+      else
+         return draw_get_shader_param_no_llvm(shader, param);
    default:
       return 0;
    }
diff --git a/src/gallium/drivers/softpipe/sp_state.h b/src/gallium/drivers/softpipe/sp_state.h
index 775a1f50c9c..c35534c931d 100644
--- a/src/gallium/drivers/softpipe/sp_state.h
+++ b/src/gallium/drivers/softpipe/sp_state.h
@@ -192,5 +192,20 @@ softpipe_find_fs_variant(struct softpipe_context *softpipe,
                          struct sp_fragment_shader *fs,
                          const struct sp_fragment_shader_variant_key *key);
 
+void
+softpipe_prepare_vertex_sampling(struct softpipe_context *ctx,
+                                 unsigned num,
+                                 struct pipe_sampler_view **views);
+void
+softpipe_cleanup_vertex_sampling(struct softpipe_context *ctx);
+
+
+void
+softpipe_prepare_geometry_sampling(struct softpipe_context *ctx,
+                                   unsigned num,
+                                   struct pipe_sampler_view **views);
+void
+softpipe_cleanup_geometry_sampling(struct softpipe_context *ctx);
+
 
 #endif
diff --git a/src/gallium/drivers/softpipe/sp_state_sampler.c b/src/gallium/drivers/softpipe/sp_state_sampler.c
index e51241892e1..e56fb5b1485 100644
--- a/src/gallium/drivers/softpipe/sp_state_sampler.c
+++ b/src/gallium/drivers/softpipe/sp_state_sampler.c
@@ -31,6 +31,7 @@
 
 #include "util/u_memory.h"
 #include "util/u_inlines.h"
+#include "util/u_format.h"
 
 #include "draw/draw_context.h"
 
@@ -39,6 +40,8 @@
 #include "sp_texture.h"
 #include "sp_tex_sample.h"
 #include "sp_tex_tile_cache.h"
+#include "sp_screen.h"
+#include "state_tracker/sw_winsys.h"
 
 
 /**
@@ -159,6 +162,159 @@ softpipe_delete_sampler_state(struct pipe_context *pipe,
 }
 
 
+static void
+prepare_shader_sampling(
+   struct softpipe_context *sp,
+   unsigned num,
+   struct pipe_sampler_view **views,
+   unsigned shader_type,
+   struct pipe_resource *mapped_tex[PIPE_MAX_SHADER_SAMPLER_VIEWS])
+{
+
+   unsigned i;
+   uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
+   uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
+   uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
+   const void *addr;
+
+   assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
+   if (!num)
+      return;
+
+   for (i = 0; i < PIPE_MAX_SHADER_SAMPLER_VIEWS; i++) {
+      struct pipe_sampler_view *view = i < num ? views[i] : NULL;
+
+      if (view) {
+         struct pipe_resource *tex = view->texture;
+         struct softpipe_resource *sp_tex = softpipe_resource(tex);
+         unsigned width0 = tex->width0;
+         unsigned num_layers = tex->depth0;
+         unsigned first_level = 0;
+         unsigned last_level = 0;
+
+         /* We're referencing the texture's internal data, so save a
+          * reference to it.
+          */
+         pipe_resource_reference(&mapped_tex[i], tex);
+
+         if (!sp_tex->dt) {
+            /* regular texture - setup array of mipmap level offsets */
+            struct pipe_resource *res = view->texture;
+            int j;
+
+            if (res->target != PIPE_BUFFER) {
+               first_level = view->u.tex.first_level;
+               last_level = view->u.tex.last_level;
+               assert(first_level <= last_level);
+               assert(last_level <= res->last_level);
+               addr = sp_tex->data;
+
+               for (j = first_level; j <= last_level; j++) {
+                  mip_offsets[j] = sp_tex->level_offset[j];
+                  row_stride[j] = sp_tex->stride[j];
+                  img_stride[j] = sp_tex->img_stride[j];
+               }
+               if (res->target == PIPE_TEXTURE_1D_ARRAY ||
+                   res->target == PIPE_TEXTURE_2D_ARRAY ||
+                   res->target == PIPE_TEXTURE_CUBE_ARRAY) {
+                  num_layers = view->u.tex.last_layer - view->u.tex.first_layer + 1;
+                  for (j = first_level; j <= last_level; j++) {
+                     mip_offsets[j] += view->u.tex.first_layer *
+                                       sp_tex->img_stride[j];
+                  }
+                  if (res->target == PIPE_TEXTURE_CUBE_ARRAY) {
+                     assert(num_layers % 6 == 0);
+                  }
+                  assert(view->u.tex.first_layer <= view->u.tex.last_layer);
+                  assert(view->u.tex.last_layer < res->array_size);
+               }
+            }
+            else {
+               unsigned view_blocksize = util_format_get_blocksize(view->format);
+               addr = sp_tex->data;
+               /* probably don't really need to fill that out */
+               mip_offsets[0] = 0;
+               row_stride[0] = 0;
+               img_stride[0] = 0;
+
+               /* everything specified in number of elements here. */
+               width0 = view->u.buf.last_element - view->u.buf.first_element + 1;
+               addr = (uint8_t *)addr + view->u.buf.first_element *
+                               view_blocksize;
+               assert(view->u.buf.first_element <= view->u.buf.last_element);
+               assert(view->u.buf.last_element * view_blocksize < res->width0);
+            }
+         }
+         else {
+            /* display target texture/surface */
+            /*
+             * XXX: Where should this be unmapped?
+             */
+            struct softpipe_screen *screen = softpipe_screen(tex->screen);
+            struct sw_winsys *winsys = screen->winsys;
+            addr = winsys->displaytarget_map(winsys, sp_tex->dt,
+                                             PIPE_TRANSFER_READ);
+            row_stride[0] = sp_tex->stride[0];
+            img_stride[0] = sp_tex->img_stride[0];
+            mip_offsets[0] = 0;
+            assert(addr);
+         }
+         draw_set_mapped_texture(sp->draw,
+                                 shader_type,
+                                 i,
+                                 width0, tex->height0, num_layers,
+                                 first_level, last_level,
+                                 addr,
+                                 row_stride, img_stride, mip_offsets);
+      }
+   }
+}
+
+
+/**
+ * Called during state validation when SP_NEW_TEXTURE is set.
+ */
+void
+softpipe_prepare_vertex_sampling(struct softpipe_context *sp,
+                                 unsigned num,
+                                 struct pipe_sampler_view **views)
+{
+   prepare_shader_sampling(sp, num, views, PIPE_SHADER_VERTEX,
+                           sp->mapped_vs_tex);
+}
+
+void
+softpipe_cleanup_vertex_sampling(struct softpipe_context *ctx)
+{
+   unsigned i;
+   for (i = 0; i < Elements(ctx->mapped_vs_tex); i++) {
+      pipe_resource_reference(&ctx->mapped_vs_tex[i], NULL);
+   }
+}
+
+
+/**
+ * Called during state validation when SP_NEW_TEXTURE is set.
+ */
+void
+softpipe_prepare_geometry_sampling(struct softpipe_context *sp,
+                                   unsigned num,
+                                   struct pipe_sampler_view **views)
+{
+   prepare_shader_sampling(sp, num, views, PIPE_SHADER_GEOMETRY,
+                           sp->mapped_gs_tex);
+}
+
+void
+softpipe_cleanup_geometry_sampling(struct softpipe_context *ctx)
+{
+   unsigned i;
+   for (i = 0; i < Elements(ctx->mapped_gs_tex); i++) {
+      pipe_resource_reference(&ctx->mapped_gs_tex[i], NULL);
+   }
+}
+
+
 void
 softpipe_init_sampler_funcs(struct pipe_context *pipe)
 {
diff --git a/src/gallium/drivers/softpipe/sp_texture.c b/src/gallium/drivers/softpipe/sp_texture.c
index 6538e46db09..c2df71e41a5 100644
--- a/src/gallium/drivers/softpipe/sp_texture.c
+++ b/src/gallium/drivers/softpipe/sp_texture.c
@@ -63,7 +63,9 @@ softpipe_resource_layout(struct pipe_screen *screen,
    uint64_t buffer_size = 0;
 
    for (level = 0; level <= pt->last_level; level++) {
-      unsigned slices;
+      unsigned slices, nblocksy;
+
+      nblocksy = util_format_get_nblocksy(pt->format, height);
 
       if (pt->target == PIPE_TEXTURE_CUBE)
          slices = 6;
@@ -76,8 +78,15 @@ softpipe_resource_layout(struct pipe_screen *screen,
 
       spr->level_offset[level] = buffer_size;
 
-      buffer_size += (uint64_t) util_format_get_nblocksy(pt->format, height) *
-                     slices * spr->stride[level];
+      /* if row_stride * height > SP_MAX_TEXTURE_SIZE */
+      if ((uint64_t)spr->stride[level] * nblocksy > SP_MAX_TEXTURE_SIZE) {
+         /* image too large */
+         return FALSE;
+      }
+
+      spr->img_stride[level] = spr->stride[level] * nblocksy;
+
+      buffer_size += (uint64_t) spr->img_stride[level] * slices;
 
       width  = u_minify(width, 1);
       height = u_minify(height, 1);
@@ -253,22 +262,9 @@ static unsigned
 sp_get_tex_image_offset(const struct softpipe_resource *spr,
                         unsigned level, unsigned layer)
 {
-   const unsigned hgt = u_minify(spr->base.height0, level);
-   const unsigned nblocksy = util_format_get_nblocksy(spr->base.format, hgt);
    unsigned offset = spr->level_offset[level];
 
-   if (spr->base.target == PIPE_TEXTURE_CUBE ||
-       spr->base.target == PIPE_TEXTURE_CUBE_ARRAY ||
-       spr->base.target == PIPE_TEXTURE_3D ||
-       spr->base.target == PIPE_TEXTURE_2D_ARRAY) {
-      offset += layer * nblocksy * spr->stride[level];
-   }
-   else if (spr->base.target == PIPE_TEXTURE_1D_ARRAY) {
-      offset += layer * spr->stride[level];
-   }
-   else {
-      assert(layer == 0);
-   }
+   offset += layer * spr->img_stride[level];
 
    return offset;
 }
@@ -354,8 +350,6 @@ softpipe_transfer_map(struct pipe_context *pipe,
    struct softpipe_transfer *spt;
    struct pipe_transfer *pt;
    enum pipe_format format = resource->format;
-   const unsigned hgt = u_minify(spr->base.height0, level);
-   const unsigned nblocksy = util_format_get_nblocksy(format, hgt);
    uint8_t *map;
 
    assert(resource);
@@ -414,7 +408,7 @@ softpipe_transfer_map(struct pipe_context *pipe,
    pt->usage = usage;
    pt->box = *box;
    pt->stride = spr->stride[level];
-   pt->layer_stride = pt->stride * nblocksy;
+   pt->layer_stride = spr->img_stride[level];
 
    spt->offset = sp_get_tex_image_offset(spr, level, box->z);
 
diff --git a/src/gallium/drivers/softpipe/sp_texture.h b/src/gallium/drivers/softpipe/sp_texture.h
index 90f35e11631..1701bf574d9 100644
--- a/src/gallium/drivers/softpipe/sp_texture.h
+++ b/src/gallium/drivers/softpipe/sp_texture.h
@@ -47,6 +47,7 @@ struct softpipe_resource
 
    unsigned long level_offset[SP_MAX_TEXTURE_2D_LEVELS];
    unsigned stride[SP_MAX_TEXTURE_2D_LEVELS];
+   unsigned img_stride[SP_MAX_TEXTURE_2D_LEVELS];
 
    /**
     * Display target, only valid for PIPE_TEXTURE_2D with the