svga: Add svga driver

1 files changed, 297 insertions, 0 deletions

diff --git a/src/gallium/drivers/svga/svga_draw_arrays.c b/src/gallium/drivers/svga/svga_draw_arrays.c
new file mode 100644
index 00000000000..75492dffca2
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_draw_arrays.c
@@ -0,0 +1,297 @@
+/**********************************************************
+ * Copyright 2008-2009 VMware, Inc.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ **********************************************************/
+
+#include "svga_cmd.h"
+
+#include "pipe/p_inlines.h"
+#include "util/u_prim.h"
+#include "indices/u_indices.h"
+
+#include "svga_hw_reg.h"
+#include "svga_draw.h"
+#include "svga_draw_private.h"
+#include "svga_context.h"
+
+
+#define DBG 0
+
+
+
+
+static enum pipe_error generate_indices( struct svga_hwtnl *hwtnl,
+                                         unsigned nr,
+                                         unsigned index_size,
+                                         u_generate_func generate,
+                                         struct pipe_buffer **out_buf )
+{
+   struct pipe_screen *screen = hwtnl->svga->pipe.screen;
+   unsigned size = index_size * nr;
+   struct pipe_buffer *dst = NULL;
+   void *dst_map = NULL;
+
+   dst = screen->buffer_create( screen, 32, 
+                                PIPE_BUFFER_USAGE_INDEX |
+                                PIPE_BUFFER_USAGE_CPU_WRITE |
+                                PIPE_BUFFER_USAGE_GPU_READ, 
+                                size );
+   if (dst == NULL)
+      goto fail;
+
+   dst_map = pipe_buffer_map( screen, dst, PIPE_BUFFER_USAGE_CPU_WRITE );
+   if (dst_map == NULL)
+      goto fail;
+
+   generate( nr,
+             dst_map );
+
+   pipe_buffer_unmap( screen, dst );
+
+   *out_buf = dst;
+   return PIPE_OK;
+
+fail:
+   if (dst_map)
+      screen->buffer_unmap( screen, dst );
+
+   if (dst)
+      screen->buffer_destroy( dst );
+
+   return PIPE_ERROR_OUT_OF_MEMORY;
+}
+
+static boolean compare( unsigned cached_nr,
+                        unsigned nr,
+                        unsigned type )
+{
+   if (type == U_GENERATE_REUSABLE)
+      return cached_nr >= nr;
+   else
+      return cached_nr == nr;
+}
+
+static enum pipe_error retrieve_or_generate_indices( struct svga_hwtnl *hwtnl,
+                                                     unsigned prim,
+                                                     unsigned gen_type,
+                                                     unsigned gen_nr,
+                                                     unsigned gen_size,
+                                                     u_generate_func generate,
+                                                     struct pipe_buffer **out_buf )
+{
+   enum pipe_error ret = PIPE_OK;
+   int i;
+
+   for (i = 0; i < IDX_CACHE_MAX; i++) {
+      if (hwtnl->index_cache[prim][i].buffer != NULL &&
+          hwtnl->index_cache[prim][i].generate == generate)
+      {
+         if (compare(hwtnl->index_cache[prim][i].gen_nr, gen_nr, gen_type))
+         {
+            pipe_buffer_reference( out_buf,
+                                   hwtnl->index_cache[prim][i].buffer );
+
+            if (DBG) 
+               debug_printf("%s retrieve %d/%d\n", __FUNCTION__, i, gen_nr);
+
+            return PIPE_OK;
+         }
+         else if (gen_type == U_GENERATE_REUSABLE) 
+         {
+            pipe_buffer_reference( &hwtnl->index_cache[prim][i].buffer,
+                                   NULL );
+
+            if (DBG) 
+               debug_printf("%s discard %d/%d\n", __FUNCTION__, 
+                            i, hwtnl->index_cache[prim][i].gen_nr);
+
+            break;
+         }
+      }
+   }
+
+   if (i == IDX_CACHE_MAX)
+   {
+      unsigned smallest = 0;
+      unsigned smallest_size = ~0;
+      
+      for (i = 0; i < IDX_CACHE_MAX && smallest_size; i++) {
+         if (hwtnl->index_cache[prim][i].buffer == NULL)
+         {
+            smallest = i;
+            smallest_size = 0;
+         }
+         else if (hwtnl->index_cache[prim][i].gen_nr < smallest)
+         {
+            smallest = i;
+            smallest_size = hwtnl->index_cache[prim][i].gen_nr;
+         }
+      }
+
+      assert (smallest != IDX_CACHE_MAX);
+
+      pipe_buffer_reference( &hwtnl->index_cache[prim][smallest].buffer,
+                             NULL );
+
+      if (DBG)
+         debug_printf("%s discard smallest %d/%d\n", __FUNCTION__, 
+                      smallest, smallest_size);
+      
+      i = smallest;
+   }
+      
+      
+   ret = generate_indices( hwtnl, 
+                           gen_nr,
+                           gen_size,
+                           generate,
+                           out_buf );
+   if (ret != PIPE_OK)
+      return ret;
+
+
+   hwtnl->index_cache[prim][i].generate = generate;
+   hwtnl->index_cache[prim][i].gen_nr = gen_nr;
+   pipe_buffer_reference( &hwtnl->index_cache[prim][i].buffer,
+                          *out_buf );
+
+   if (DBG)
+      debug_printf("%s cache %d/%d\n", __FUNCTION__, 
+                   i, hwtnl->index_cache[prim][i].gen_nr);
+
+   return PIPE_OK;
+}
+
+
+
+static enum pipe_error
+simple_draw_arrays( struct svga_hwtnl *hwtnl,
+                    unsigned prim, unsigned start, unsigned count )
+{
+   SVGA3dPrimitiveRange range;
+   unsigned hw_prim;
+   unsigned hw_count;
+
+   hw_prim = svga_translate_prim(prim, count, &hw_count);
+   if (hw_count == 0)
+      return PIPE_ERROR_BAD_INPUT;
+      
+   range.primType = hw_prim;
+   range.primitiveCount = hw_count;
+   range.indexArray.surfaceId = SVGA3D_INVALID_ID;
+   range.indexArray.offset = 0;
+   range.indexArray.stride = 0;
+   range.indexWidth = 0;
+   range.indexBias = start;
+
+   /* Min/max index should be calculated prior to applying bias, so we
+    * end up with min_index = 0, max_index = count - 1 and everybody
+    * looking at those numbers knows to adjust them by
+    * range.indexBias.
+    */
+   return svga_hwtnl_prim( hwtnl, &range, 0, count - 1, NULL );
+}
+
+
+
+
+
+
+
+
+
+
+enum pipe_error 
+svga_hwtnl_draw_arrays( struct svga_hwtnl *hwtnl,
+                        unsigned prim, 
+                        unsigned start, 
+                        unsigned count)
+{
+   unsigned gen_prim, gen_size, gen_nr, gen_type;
+   u_generate_func gen_func;
+   enum pipe_error ret = PIPE_OK;
+
+   if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL && 
+       prim >= PIPE_PRIM_TRIANGLES) 
+   {
+      gen_type = u_unfilled_generator( prim,
+                                       start,
+                                       count,
+                                       hwtnl->api_fillmode,
+                                       &gen_prim,
+                                       &gen_size,
+                                       &gen_nr,
+                                       &gen_func );
+   }
+   else {
+      gen_type = u_index_generator( svga_hw_prims,
+                                    prim,
+                                    start,
+                                    count,
+                                    hwtnl->api_pv,
+                                    hwtnl->hw_pv,
+                                    &gen_prim,
+                                    &gen_size,
+                                    &gen_nr,
+                                    &gen_func );
+   }
+
+   if (gen_type == U_GENERATE_LINEAR) {
+      return simple_draw_arrays( hwtnl, gen_prim, start, count );
+   }
+   else {
+      struct pipe_buffer *gen_buf = NULL;
+
+      /* Need to draw as indexed primitive. 
+       * Potentially need to run the gen func to build an index buffer.
+       */
+      ret = retrieve_or_generate_indices( hwtnl,
+                                          prim,
+                                          gen_type,
+                                          gen_nr,
+                                          gen_size,
+                                          gen_func,
+                                          &gen_buf );
+      if (ret)
+         goto done;
+
+      ret = svga_hwtnl_simple_draw_range_elements( hwtnl,
+                                                   gen_buf,
+                                                   gen_size,
+                                                   0,
+                                                   count - 1,
+                                                   gen_prim,
+                                                   0,
+                                                   gen_nr,
+                                                   start );
+      if (ret)
+         goto done;
+
+   done:
+      if (gen_buf)
+         pipe_buffer_reference( &gen_buf, NULL );
+
+      return ret;
+   }
+}
+