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Diffstat (limited to 'dist/Mesa/src/mesa/drivers/dri/i915tex/intel_regions.c')
-rw-r--r--dist/Mesa/src/mesa/drivers/dri/i915tex/intel_regions.c471
1 files changed, 471 insertions, 0 deletions
diff --git a/dist/Mesa/src/mesa/drivers/dri/i915tex/intel_regions.c b/dist/Mesa/src/mesa/drivers/dri/i915tex/intel_regions.c
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index 000000000..1205b180c
--- /dev/null
+++ b/dist/Mesa/src/mesa/drivers/dri/i915tex/intel_regions.c
@@ -0,0 +1,471 @@
+/**************************************************************************
+ *
+ * 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__);
+ if (region && region->buffer)
+ driBOWaitIdle(region->buffer, GL_FALSE);
+}
+
+/* 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);
+
+ region->map = driBOMap(region->buffer,
+ DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 0);
+ }
+
+ return region->map;
+}
+
+void
+intel_region_unmap(intelScreenPrivate *intelScreen, struct intel_region *region)
+{
+ DBG("%s\n", __FUNCTION__);
+ if (!--region->map_refcount) {
+ driBOUnmap(region->buffer);
+ region->map = NULL;
+ }
+}
+
+#undef TEST_CACHED_TEXTURES
+
+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;
+
+ driGenBuffers(intelScreen->regionPool,
+ "region", 1, &region->buffer, 64,
+#ifdef TEST_CACHED_TEXTURES
+ DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_BIND_CACHED |
+ DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE,
+#else
+ 0,
+#endif
+ 0);
+ driBOData(region->buffer, pitch * cpp * height, NULL, 0);
+ 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;
+ driBOUnReference((*region)->buffer);
+ free(*region);
+ }
+ *region = NULL;
+}
+
+
+struct intel_region *
+intel_region_create_static(intelScreenPrivate *intelScreen,
+ GLuint mem_type,
+ 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;
+
+ /*
+ * We use a "shared" buffer type to indicate buffers created and
+ * shared by others.
+ */
+
+ driGenBuffers(intelScreen->staticPool, "static region", 1,
+ &region->buffer, 64,
+ DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_NO_MOVE |
+ DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 0);
+ driBOSetStatic(region->buffer, offset, pitch * cpp * height, virtual, 0);
+
+ return region;
+}
+
+
+
+void
+intel_region_update_static(intelScreenPrivate *intelScreen,
+ struct intel_region *region,
+ GLuint mem_type,
+ 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.
+ */
+
+ driDeleteBuffers(1, &region->buffer);
+ driGenBuffers(intelScreen->staticPool, "static region", 1,
+ &region->buffer, 64,
+ DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_NO_MOVE |
+ DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 0);
+ driBOSetStatic(region->buffer, offset, pitch * cpp * height, virtual, 0);
+
+}
+
+
+
+/*
+ * 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,
+ 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,
+ 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) {
+ driDeleteBuffers(1, &region->buffer);
+ region->buffer = NULL;
+ }
+
+ region->pbo = pbo;
+ region->pbo->region = region;
+ region->buffer = driBOReference(pbo->buffer);
+}
+
+
+/* Break the COW tie to the pbo. 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;
+ driBOUnReference(region->buffer);
+ region->buffer = NULL;
+
+ driGenBuffers(intelScreen->regionPool,
+ "region", 1, &region->buffer, 64, 0, 0);
+ driBOData(region->buffer,
+ region->cpp * region->pitch * region->height, NULL, 0);
+}
+
+/* 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);
+ }
+}
+
+struct _DriBufferObject *
+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;
+}
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