Move i915tex driver into place as just i915.

1 files changed, 482 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915/intel_regions.c b/src/mesa/drivers/dri/i915/intel_regions.c
new file mode 100644
index 0000000000..4eac859a13
--- /dev/null
+++ b/src/mesa/drivers/dri/i915/intel_regions.c
@@ -0,0 +1,482 @@
+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ * 
+ **************************************************************************/
+
+/* Provide additional functionality on top of bufmgr buffers:
+ *   - 2d semantics and blit operations
+ *   - refcounting of buffers for multiple images in a buffer.
+ *   - refcounting of buffer mappings.
+ *   - some logic for moving the buffers to the best memory pools for
+ *     given operations.
+ *
+ * Most of this is to make it easier to implement the fixed-layout
+ * mipmap tree required by intel hardware in the face of GL's
+ * programming interface where each image can be specifed in random
+ * order and it isn't clear what layout the tree should have until the
+ * last moment.
+ */
+
+#include "intel_context.h"
+#include "intel_regions.h"
+#include "intel_blit.h"
+#include "intel_buffer_objects.h"
+#include "dri_bufmgr.h"
+#include "intel_batchbuffer.h"
+
+#define FILE_DEBUG_FLAG DEBUG_REGION
+
+void
+intel_region_idle(intelScreenPrivate *intelScreen, struct intel_region *region)
+{
+   DBG("%s\n", __FUNCTION__);
+   /* XXX: Using this function is likely bogus -- it ought to only have been
+    * used before a map, anyway, but leave this cheap implementation of it
+    * for now.
+    */
+   if (region && region->buffer) {
+      /* Mapping it for read will ensure that any acceleration to the region
+       * would have landed already.
+       */
+      dri_bo_map(region->buffer, GL_TRUE);
+      dri_bo_unmap(region->buffer);
+   }
+}
+
+/* XXX: Thread safety?
+ */
+GLubyte *
+intel_region_map(intelScreenPrivate *intelScreen, struct intel_region *region)
+{
+   DBG("%s\n", __FUNCTION__);
+   if (!region->map_refcount++) {
+      if (region->pbo)
+         intel_region_cow(intelScreen, region);
+
+      dri_bo_map(region->buffer, GL_TRUE);
+      region->map = region->buffer->virtual;
+   }
+
+   return region->map;
+}
+
+void
+intel_region_unmap(intelScreenPrivate *intelScreen, struct intel_region *region)
+{
+   DBG("%s\n", __FUNCTION__);
+   if (!--region->map_refcount) {
+      dri_bo_unmap(region->buffer);
+      region->map = NULL;
+   }
+}
+
+struct intel_region *
+intel_region_alloc(intelScreenPrivate *intelScreen,
+                   GLuint cpp, GLuint pitch, GLuint height)
+{
+   struct intel_region *region = calloc(sizeof(*region), 1);
+
+   DBG("%s\n", __FUNCTION__);
+
+   region->cpp = cpp;
+   region->pitch = pitch;
+   region->height = height;     /* needed? */
+   region->refcount = 1;
+
+   region->buffer = dri_bo_alloc(intelScreen->bufmgr, "region",
+				 pitch * cpp * height, 64, DRM_BO_FLAG_MEM_TT);
+   return region;
+}
+
+void
+intel_region_reference(struct intel_region **dst, struct intel_region *src)
+{
+   assert(*dst == NULL);
+   if (src) {
+      src->refcount++;
+      *dst = src;
+   }
+}
+
+void
+intel_region_release(struct intel_region **region)
+{
+   if (!*region)
+      return;
+
+   DBG("%s %d\n", __FUNCTION__, (*region)->refcount - 1);
+
+   ASSERT((*region)->refcount > 0);
+   (*region)->refcount--;
+
+   if ((*region)->refcount == 0) {
+      assert((*region)->map_refcount == 0);
+
+      if ((*region)->pbo)
+	 (*region)->pbo->region = NULL;
+      (*region)->pbo = NULL;
+      dri_bo_unreference((*region)->buffer);
+      free(*region);
+   }
+   *region = NULL;
+}
+
+
+struct intel_region *
+intel_region_create_static(intelScreenPrivate *intelScreen,
+                           GLuint mem_type,
+			   unsigned int bo_handle,
+                           GLuint offset,
+                           void *virtual,
+                           GLuint cpp, GLuint pitch, GLuint height)
+{
+   struct intel_region *region = calloc(sizeof(*region), 1);
+   DBG("%s\n", __FUNCTION__);
+
+   region->cpp = cpp;
+   region->pitch = pitch;
+   region->height = height;     /* needed? */
+   region->refcount = 1;
+
+   if (intelScreen->ttm) {
+      assert(bo_handle != -1);
+      region->buffer = dri_ttm_bo_create_from_handle(intelScreen->bufmgr,
+						     "static region",
+						     bo_handle);
+   } else {
+      region->buffer = dri_bo_alloc_static(intelScreen->bufmgr,
+					   "static region",
+					   offset, pitch * cpp * height,
+					   virtual,
+					   DRM_BO_FLAG_MEM_TT);
+   }
+
+   return region;
+}
+
+
+
+void
+intel_region_update_static(intelScreenPrivate *intelScreen,
+			   struct intel_region *region,
+                           GLuint mem_type,
+			   unsigned int bo_handle,
+                           GLuint offset,
+                           void *virtual,
+                           GLuint cpp, GLuint pitch, GLuint height)
+{
+   DBG("%s\n", __FUNCTION__);
+
+   region->cpp = cpp;
+   region->pitch = pitch;
+   region->height = height;     /* needed? */
+
+   /*
+    * We use a "shared" buffer type to indicate buffers created and
+    * shared by others.
+    */
+
+   dri_bo_unreference(region->buffer);
+   if (intelScreen->ttm) {
+      assert(bo_handle != -1);
+      region->buffer = dri_ttm_bo_create_from_handle(intelScreen->bufmgr,
+						     "static region",
+						     bo_handle);
+   } else {
+      region->buffer = dri_bo_alloc_static(intelScreen->bufmgr,
+					   "static region",
+					   offset, pitch * cpp * height,
+					   virtual,
+					   DRM_BO_FLAG_MEM_TT);
+   }
+}
+
+
+
+/*
+ * XXX Move this into core Mesa?
+ */
+static void
+_mesa_copy_rect(GLubyte * dst,
+                GLuint cpp,
+                GLuint dst_pitch,
+                GLuint dst_x,
+                GLuint dst_y,
+                GLuint width,
+                GLuint height,
+                const GLubyte * src,
+                GLuint src_pitch, GLuint src_x, GLuint src_y)
+{
+   GLuint i;
+
+   dst_pitch *= cpp;
+   src_pitch *= cpp;
+   dst += dst_x * cpp;
+   src += src_x * cpp;
+   dst += dst_y * dst_pitch;
+   src += src_y * dst_pitch;
+   width *= cpp;
+
+   if (width == dst_pitch && width == src_pitch)
+      memcpy(dst, src, height * width);
+   else {
+      for (i = 0; i < height; i++) {
+         memcpy(dst, src, width);
+         dst += dst_pitch;
+         src += src_pitch;
+      }
+   }
+}
+
+
+/* Upload data to a rectangular sub-region.  Lots of choices how to do this:
+ *
+ * - memcpy by span to current destination
+ * - upload data as new buffer and blit
+ *
+ * Currently always memcpy.
+ */
+void
+intel_region_data(intelScreenPrivate *intelScreen,
+                  struct intel_region *dst,
+                  GLuint dst_offset,
+                  GLuint dstx, GLuint dsty,
+                  const void *src, GLuint src_pitch,
+                  GLuint srcx, GLuint srcy, GLuint width, GLuint height)
+{
+   struct intel_context *intel = intelScreenContext(intelScreen);
+
+   DBG("%s\n", __FUNCTION__);
+
+   if (intel == NULL)
+      return;
+
+   if (dst->pbo) {
+      if (dstx == 0 &&
+          dsty == 0 && width == dst->pitch && height == dst->height)
+         intel_region_release_pbo(intelScreen, dst);
+      else
+         intel_region_cow(intelScreen, dst);
+   }
+
+
+   LOCK_HARDWARE(intel);
+
+   _mesa_copy_rect(intel_region_map(intelScreen, dst) + dst_offset,
+                   dst->cpp,
+                   dst->pitch,
+                   dstx, dsty, width, height, src, src_pitch, srcx, srcy);
+
+   intel_region_unmap(intelScreen, dst);
+
+   UNLOCK_HARDWARE(intel);
+
+}
+
+/* Copy rectangular sub-regions. Need better logic about when to
+ * push buffers into AGP - will currently do so whenever possible.
+ */
+void
+intel_region_copy(intelScreenPrivate *intelScreen,
+                  struct intel_region *dst,
+                  GLuint dst_offset,
+                  GLuint dstx, GLuint dsty,
+                  struct intel_region *src,
+                  GLuint src_offset,
+                  GLuint srcx, GLuint srcy, GLuint width, GLuint height)
+{
+   struct intel_context *intel = intelScreenContext(intelScreen);
+
+   DBG("%s\n", __FUNCTION__);
+
+   if (intel == NULL)
+      return;
+
+   if (dst->pbo) {
+      if (dstx == 0 &&
+          dsty == 0 && width == dst->pitch && height == dst->height)
+         intel_region_release_pbo(intelScreen, dst);
+      else
+         intel_region_cow(intelScreen, dst);
+   }
+
+   assert(src->cpp == dst->cpp);
+
+   intelEmitCopyBlit(intel,
+                     dst->cpp,
+                     src->pitch, src->buffer, src_offset,
+                     dst->pitch, dst->buffer, dst_offset,
+                     srcx, srcy, dstx, dsty, width, height,
+		     GL_COPY);
+}
+
+/* Fill a rectangular sub-region.  Need better logic about when to
+ * push buffers into AGP - will currently do so whenever possible.
+ */
+void
+intel_region_fill(intelScreenPrivate *intelScreen,
+                  struct intel_region *dst,
+                  GLuint dst_offset,
+                  GLuint dstx, GLuint dsty,
+                  GLuint width, GLuint height, GLuint color)
+{
+   struct intel_context *intel = intelScreenContext(intelScreen);
+
+   DBG("%s\n", __FUNCTION__);
+
+   if (intel == NULL)
+      return;   
+
+   if (dst->pbo) {
+      if (dstx == 0 &&
+          dsty == 0 && width == dst->pitch && height == dst->height)
+         intel_region_release_pbo(intelScreen, dst);
+      else
+         intel_region_cow(intelScreen, dst);
+   }
+
+   intelEmitFillBlit(intel,
+                     dst->cpp,
+                     dst->pitch, dst->buffer, dst_offset,
+                     dstx, dsty, width, height, color);
+}
+
+/* Attach to a pbo, discarding our data.  Effectively zero-copy upload
+ * the pbo's data.
+ */
+void
+intel_region_attach_pbo(intelScreenPrivate *intelScreen,
+                        struct intel_region *region,
+                        struct intel_buffer_object *pbo)
+{
+   if (region->pbo == pbo)
+      return;
+
+   /* If there is already a pbo attached, break the cow tie now.
+    * Don't call intel_region_release_pbo() as that would
+    * unnecessarily allocate a new buffer we would have to immediately
+    * discard.
+    */
+   if (region->pbo) {
+      region->pbo->region = NULL;
+      region->pbo = NULL;
+   }
+
+   if (region->buffer) {
+      dri_bo_unreference(region->buffer);
+      region->buffer = NULL;
+   }
+
+   region->pbo = pbo;
+   region->pbo->region = region;
+   dri_bo_reference(pbo->buffer);
+   region->buffer = pbo->buffer;
+}
+
+
+/* Break the COW tie to the pbo and allocate a new buffer.
+ * The pbo gets to keep the data.
+ */
+void
+intel_region_release_pbo(intelScreenPrivate *intelScreen,
+                         struct intel_region *region)
+{
+   assert(region->buffer == region->pbo->buffer);
+   region->pbo->region = NULL;
+   region->pbo = NULL;
+   dri_bo_unreference(region->buffer);
+   region->buffer = NULL;
+
+   region->buffer = dri_bo_alloc(intelScreen->bufmgr, "region",
+				 region->pitch * region->cpp * region->height,
+				 64, DRM_BO_FLAG_MEM_TT);
+}
+
+/* Break the COW tie to the pbo.  Both the pbo and the region end up
+ * with a copy of the data.
+ */
+void
+intel_region_cow(intelScreenPrivate *intelScreen, struct intel_region *region)
+{
+   struct intel_context *intel = intelScreenContext(intelScreen);
+   struct intel_buffer_object *pbo = region->pbo;
+
+   if (intel == NULL)
+      return;
+
+   intel_region_release_pbo(intelScreen, region);
+
+   assert(region->cpp * region->pitch * region->height == pbo->Base.Size);
+
+   DBG("%s (%d bytes)\n", __FUNCTION__, pbo->Base.Size);
+
+   /* Now blit from the texture buffer to the new buffer: 
+    */
+
+   intel_batchbuffer_flush(intel->batch);
+
+   if (!intel->locked) {
+      LOCK_HARDWARE(intel);
+      intelEmitCopyBlit(intel,
+			region->cpp,
+			region->pitch,
+			region->buffer, 0,
+			region->pitch,
+			pbo->buffer, 0,
+			0, 0, 0, 0, 
+			region->pitch, region->height,
+			GL_COPY);
+      
+      intel_batchbuffer_flush(intel->batch);
+      UNLOCK_HARDWARE(intel);
+   }
+   else {
+      intelEmitCopyBlit(intel,
+			region->cpp,
+			region->pitch,
+			region->buffer, 0,
+			region->pitch,
+			pbo->buffer, 0,
+			0, 0, 0, 0, 
+			region->pitch, region->height,
+			GL_COPY);
+      
+      intel_batchbuffer_flush(intel->batch);
+   }
+}
+
+dri_bo *
+intel_region_buffer(intelScreenPrivate *intelScreen,
+                    struct intel_region *region, GLuint flag)
+{
+   if (region->pbo) {
+      if (flag == INTEL_WRITE_PART)
+         intel_region_cow(intelScreen, region);
+      else if (flag == INTEL_WRITE_FULL)
+         intel_region_release_pbo(intelScreen, region);
+   }
+
+   return region->buffer;
+}