| /************************************************************************** |
| * |
| * 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 "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) |
| { |
| intelFlush(&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 && |
| intel->intelScreen->kernel_exec_fencing) |
| drm_intel_gem_bo_map_gtt(region->buffer); |
| else |
| dri_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 && |
| intel->intelScreen->kernel_exec_fencing) |
| drm_intel_gem_bo_unmap_gtt(region->buffer); |
| else |
| dri_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, |
| dri_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; |
| region->bit_6_swizzle = I915_BIT_6_SWIZZLE_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, GLuint pitch, |
| GLboolean expect_accelerated_upload) |
| { |
| dri_bo *buffer; |
| struct intel_region *region; |
| |
| /* If we're tiled, our allocations are in 8 or 32-row blocks, so |
| * failure to align our height means that we won't allocate enough pages. |
| * |
| * If we're untiled, we still have to align to 2 rows high because the |
| * data port accesses 2x2 blocks even if the bottom row isn't to be |
| * rendered, so failure to align means we could walk off the end of the |
| * GTT and fault. |
| */ |
| if (tiling == I915_TILING_X) |
| height = ALIGN(height, 8); |
| else if (tiling == I915_TILING_Y) |
| height = ALIGN(height, 32); |
| else |
| height = ALIGN(height, 2); |
| |
| /* If we're untiled, we have to align to 2 rows high because the |
| * data port accesses 2x2 blocks even if the bottom row isn't to be |
| * rendered, so failure to align means we could walk off the end of the |
| * GTT and fault. |
| */ |
| height = ALIGN(height, 2); |
| |
| if (expect_accelerated_upload) { |
| buffer = drm_intel_bo_alloc_for_render(intel->bufmgr, "region", |
| pitch * cpp * height, 64); |
| } else { |
| buffer = drm_intel_bo_alloc(intel->bufmgr, "region", |
| pitch * cpp * height, 64); |
| } |
| |
| region = intel_region_alloc_internal(intel, cpp, width, height, |
| pitch, buffer); |
| |
| if (tiling != I915_TILING_NONE) { |
| assert(((pitch * cpp) & 127) == 0); |
| drm_intel_bo_set_tiling(buffer, &tiling, pitch * cpp); |
| drm_intel_bo_get_tiling(buffer, ®ion->tiling, ®ion->bit_6_swizzle); |
| } |
| |
| 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; |
| dri_bo *buffer; |
| int ret; |
| |
| 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 = dri_bo_get_tiling(region->buffer, ®ion->tiling, |
| ®ion->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(®ion); |
| return NULL; |
| } |
| |
| 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; |
| dri_bo_unreference(region->buffer); |
| |
| 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 * 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(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); |
| } |
| |
| _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, |
| GLenum logicop) |
| { |
| _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); |
| |
| 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) |
| { |
| dri_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) { |
| dri_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; |
| dri_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; |
| dri_bo_unreference(region->buffer); |
| region->buffer = NULL; |
| |
| region->buffer = dri_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: |
| */ |
| |
| 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); |
| } |
| |
| dri_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; |
| } |