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Diffstat (limited to 'src/mesa/drivers/dri/intel/intel_regions.c')
-rw-r--r--src/mesa/drivers/dri/intel/intel_regions.c507
1 files changed, 507 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_regions.c b/src/mesa/drivers/dri/intel/intel_regions.c
new file mode 100644
index 0000000000..fe4de18960
--- /dev/null
+++ b/src/mesa/drivers/dri/intel/intel_regions.c
@@ -0,0 +1,507 @@
+/**************************************************************************
+ *
+ * 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 <sys/ioctl.h>
+#include <errno.h>
+
+#include "main/hash.h"
+#include "intel_context.h"
+#include "intel_regions.h"
+#include "intel_blit.h"
+#include "intel_buffer_objects.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+
+#define FILE_DEBUG_FLAG DEBUG_REGION
+
+/* This should be set to the maximum backtrace size desired.
+ * Set it to 0 to disable backtrace debugging.
+ */
+#define DEBUG_BACKTRACE_SIZE 0
+
+#if DEBUG_BACKTRACE_SIZE == 0
+/* Use the standard debug output */
+#define _DBG(...) DBG(__VA_ARGS__)
+#else
+/* Use backtracing debug output */
+#define _DBG(...) {debug_backtrace(); DBG(__VA_ARGS__);}
+
+/* Backtracing debug support */
+#include <execinfo.h>
+
+static void
+debug_backtrace(void)
+{
+ void *trace[DEBUG_BACKTRACE_SIZE];
+ char **strings = NULL;
+ int traceSize;
+ register int i;
+
+ traceSize = backtrace(trace, DEBUG_BACKTRACE_SIZE);
+ strings = backtrace_symbols(trace, traceSize);
+ if (strings == NULL) {
+ DBG("no backtrace:");
+ return;
+ }
+
+ /* Spit out all the strings with a colon separator. Ignore
+ * the first, since we don't really care about the call
+ * to debug_backtrace() itself. Skip until the final "/" in
+ * the trace to avoid really long lines.
+ */
+ for (i = 1; i < traceSize; i++) {
+ char *p = strings[i], *slash = strings[i];
+ while (*p) {
+ if (*p++ == '/') {
+ slash = p;
+ }
+ }
+
+ DBG("%s:", slash);
+ }
+
+ /* Free up the memory, and we're done */
+ free(strings);
+}
+
+#endif
+
+
+
+/* XXX: Thread safety?
+ */
+GLubyte *
+intel_region_map(struct intel_context *intel, struct intel_region *region)
+{
+ intel_flush(&intel->ctx);
+
+ _DBG("%s %p\n", __FUNCTION__, region);
+ if (!region->map_refcount++) {
+ if (region->pbo)
+ intel_region_cow(intel, region);
+
+ if (region->tiling != I915_TILING_NONE)
+ drm_intel_gem_bo_map_gtt(region->buffer);
+ else
+ drm_intel_bo_map(region->buffer, GL_TRUE);
+ region->map = region->buffer->virtual;
+ }
+
+ return region->map;
+}
+
+void
+intel_region_unmap(struct intel_context *intel, struct intel_region *region)
+{
+ _DBG("%s %p\n", __FUNCTION__, region);
+ if (!--region->map_refcount) {
+ if (region->tiling != I915_TILING_NONE)
+ drm_intel_gem_bo_unmap_gtt(region->buffer);
+ else
+ drm_intel_bo_unmap(region->buffer);
+ region->map = NULL;
+ }
+}
+
+static struct intel_region *
+intel_region_alloc_internal(struct intel_context *intel,
+ GLuint cpp,
+ GLuint width, GLuint height, GLuint pitch,
+ drm_intel_bo *buffer)
+{
+ struct intel_region *region;
+
+ if (buffer == NULL) {
+ _DBG("%s <-- NULL\n", __FUNCTION__);
+ return NULL;
+ }
+
+ region = calloc(sizeof(*region), 1);
+ region->cpp = cpp;
+ region->width = width;
+ region->height = height;
+ region->pitch = pitch;
+ region->refcount = 1;
+ region->buffer = buffer;
+
+ /* Default to no tiling */
+ region->tiling = I915_TILING_NONE;
+
+ _DBG("%s <-- %p\n", __FUNCTION__, region);
+ return region;
+}
+
+struct intel_region *
+intel_region_alloc(struct intel_context *intel,
+ uint32_t tiling,
+ GLuint cpp, GLuint width, GLuint height,
+ GLboolean expect_accelerated_upload)
+{
+ drm_intel_bo *buffer;
+ struct intel_region *region;
+ unsigned long flags = 0;
+ unsigned long aligned_pitch;
+
+ if (expect_accelerated_upload)
+ flags |= BO_ALLOC_FOR_RENDER;
+
+ buffer = drm_intel_bo_alloc_tiled(intel->bufmgr, "region",
+ width, height, cpp,
+ &tiling, &aligned_pitch, flags);
+
+ region = intel_region_alloc_internal(intel, cpp, width, height,
+ aligned_pitch / cpp, buffer);
+ region->tiling = tiling;
+
+ return region;
+}
+
+struct intel_region *
+intel_region_alloc_for_handle(struct intel_context *intel,
+ GLuint cpp,
+ GLuint width, GLuint height, GLuint pitch,
+ GLuint handle, const char *name)
+{
+ struct intel_region *region, *dummy;
+ drm_intel_bo *buffer;
+ int ret;
+ uint32_t bit_6_swizzle;
+
+ region = _mesa_HashLookup(intel->intelScreen->named_regions, handle);
+ if (region != NULL) {
+ dummy = NULL;
+ if (region->width != width || region->height != height ||
+ region->cpp != cpp || region->pitch != pitch) {
+ fprintf(stderr,
+ "Region for name %d already exists but is not compatible\n",
+ handle);
+ return NULL;
+ }
+ intel_region_reference(&dummy, region);
+ return dummy;
+ }
+
+ buffer = intel_bo_gem_create_from_name(intel->bufmgr, name, handle);
+
+ region = intel_region_alloc_internal(intel, cpp,
+ width, height, pitch, buffer);
+ if (region == NULL)
+ return region;
+
+ ret = drm_intel_bo_get_tiling(region->buffer, &region->tiling,
+ &bit_6_swizzle);
+ if (ret != 0) {
+ fprintf(stderr, "Couldn't get tiling of buffer %d (%s): %s\n",
+ handle, name, strerror(-ret));
+ intel_region_release(&region);
+ return NULL;
+ }
+
+ region->name = handle;
+ region->screen = intel->intelScreen;
+ _mesa_HashInsert(intel->intelScreen->named_regions, handle, region);
+
+ return region;
+}
+
+void
+intel_region_reference(struct intel_region **dst, struct intel_region *src)
+{
+ if (src)
+ _DBG("%s %p %d\n", __FUNCTION__, src, src->refcount);
+
+ assert(*dst == NULL);
+ if (src) {
+ src->refcount++;
+ *dst = src;
+ }
+}
+
+void
+intel_region_release(struct intel_region **region_handle)
+{
+ struct intel_region *region = *region_handle;
+
+ if (region == NULL) {
+ _DBG("%s NULL\n", __FUNCTION__);
+ return;
+ }
+
+ _DBG("%s %p %d\n", __FUNCTION__, region, 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;
+ drm_intel_bo_unreference(region->buffer);
+
+ if (region->name > 0)
+ _mesa_HashRemove(region->screen->named_regions, region->name);
+
+ free(region);
+ }
+ *region_handle = NULL;
+}
+
+/*
+ * XXX Move this into core Mesa?
+ */
+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 * src_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(struct intel_context *intel,
+ 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)
+{
+ _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(intel, dst);
+ else
+ intel_region_cow(intel, dst);
+ }
+
+ intel_prepare_render(intel);
+
+ _mesa_copy_rect(intel_region_map(intel, dst) + dst_offset,
+ dst->cpp,
+ dst->pitch,
+ dstx, dsty, width, height, src, src_pitch, srcx, srcy);
+
+ intel_region_unmap(intel, dst);
+}
+
+/* Copy rectangular sub-regions. Need better logic about when to
+ * push buffers into AGP - will currently do so whenever possible.
+ */
+GLboolean
+intel_region_copy(struct intel_context *intel,
+ 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,
+ GLboolean flip,
+ GLenum logicop)
+{
+ uint32_t src_pitch = src->pitch;
+
+ _DBG("%s\n", __FUNCTION__);
+
+ if (intel == NULL)
+ return GL_FALSE;
+
+ if (dst->pbo) {
+ if (dstx == 0 &&
+ dsty == 0 && width == dst->pitch && height == dst->height)
+ intel_region_release_pbo(intel, dst);
+ else
+ intel_region_cow(intel, dst);
+ }
+
+ assert(src->cpp == dst->cpp);
+
+ if (flip)
+ src_pitch = -src_pitch;
+
+ return intelEmitCopyBlit(intel,
+ dst->cpp,
+ src_pitch, src->buffer, src_offset, src->tiling,
+ dst->pitch, dst->buffer, dst_offset, dst->tiling,
+ srcx, srcy, dstx, dsty, width, height,
+ logicop);
+}
+
+/* Attach to a pbo, discarding our data. Effectively zero-copy upload
+ * the pbo's data.
+ */
+void
+intel_region_attach_pbo(struct intel_context *intel,
+ struct intel_region *region,
+ struct intel_buffer_object *pbo)
+{
+ drm_intel_bo *buffer;
+
+ if (region->pbo == pbo)
+ return;
+
+ _DBG("%s %p %p\n", __FUNCTION__, region, pbo);
+
+ /* 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) {
+ drm_intel_bo_unreference(region->buffer);
+ region->buffer = NULL;
+ }
+
+ /* make sure pbo has a buffer of its own */
+ buffer = intel_bufferobj_buffer(intel, pbo, INTEL_WRITE_FULL);
+
+ region->pbo = pbo;
+ region->pbo->region = region;
+ drm_intel_bo_reference(buffer);
+ region->buffer = buffer;
+ region->tiling = I915_TILING_NONE;
+}
+
+
+/* Break the COW tie to the pbo and allocate a new buffer.
+ * The pbo gets to keep the data.
+ */
+void
+intel_region_release_pbo(struct intel_context *intel,
+ struct intel_region *region)
+{
+ _DBG("%s %p\n", __FUNCTION__, region);
+ assert(region->buffer == region->pbo->buffer);
+ region->pbo->region = NULL;
+ region->pbo = NULL;
+ drm_intel_bo_unreference(region->buffer);
+ region->buffer = NULL;
+
+ region->buffer = drm_intel_bo_alloc(intel->bufmgr, "region",
+ region->pitch * region->cpp *
+ region->height,
+ 64);
+}
+
+/* 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(struct intel_context *intel, struct intel_region *region)
+{
+ struct intel_buffer_object *pbo = region->pbo;
+ GLboolean ok;
+
+ intel_region_release_pbo(intel, region);
+
+ assert(region->cpp * region->pitch * region->height == pbo->Base.Size);
+
+ _DBG("%s %p (%d bytes)\n", __FUNCTION__, region, pbo->Base.Size);
+
+ /* Now blit from the texture buffer to the new buffer:
+ */
+
+ intel_prepare_render(intel);
+ ok = intelEmitCopyBlit(intel,
+ region->cpp,
+ region->pitch, pbo->buffer, 0, region->tiling,
+ region->pitch, region->buffer, 0, region->tiling,
+ 0, 0, 0, 0,
+ region->pitch, region->height,
+ GL_COPY);
+ assert(ok);
+}
+
+drm_intel_bo *
+intel_region_buffer(struct intel_context *intel,
+ struct intel_region *region, GLuint flag)
+{
+ if (region->pbo) {
+ if (flag == INTEL_WRITE_PART)
+ intel_region_cow(intel, region);
+ else if (flag == INTEL_WRITE_FULL)
+ intel_region_release_pbo(intel, region);
+ }
+
+ return region->buffer;
+}
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