X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fdrivers%2Fdri%2Fi965%2Fintel_buffer_objects.c;h=7a5b3fca595e3f3db46eb97553d75d37fc015d5f;hb=005c8e01062e8e88a86904b955d5422742bd32e7;hp=e06dd3c8d3c54014cf16e795a8c3d139b2ebfb59;hpb=ee0735fa2d4b2d2a9eae1f55e8f93f1f57feaf6d;p=mesa.git diff --git a/src/mesa/drivers/dri/i965/intel_buffer_objects.c b/src/mesa/drivers/dri/i965/intel_buffer_objects.c deleted file mode 120000 index e06dd3c8d3c..00000000000 --- a/src/mesa/drivers/dri/i965/intel_buffer_objects.c +++ /dev/null @@ -1 +0,0 @@ -../intel/intel_buffer_objects.c \ No newline at end of file diff --git a/src/mesa/drivers/dri/i965/intel_buffer_objects.c b/src/mesa/drivers/dri/i965/intel_buffer_objects.c new file mode 100644 index 00000000000..7a5b3fca595 --- /dev/null +++ b/src/mesa/drivers/dri/i965/intel_buffer_objects.c @@ -0,0 +1,650 @@ +/* + * Copyright 2003 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 (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 NONINFRINGEMENT. + * IN NO EVENT SHALL VMWARE 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. + */ + +/** + * @file intel_buffer_objects.c + * + * This provides core GL buffer object functionality. + */ + +#include "main/imports.h" +#include "main/mtypes.h" +#include "main/macros.h" +#include "main/bufferobj.h" + +#include "brw_context.h" +#include "intel_blit.h" +#include "intel_buffer_objects.h" +#include "intel_batchbuffer.h" + +/** + * Map a buffer object; issue performance warnings if mapping causes stalls. + * + * This matches the drm_intel_bo_map API, but takes an additional human-readable + * name for the buffer object to use in the performance debug message. + */ +int +brw_bo_map(struct brw_context *brw, + drm_intel_bo *bo, int write_enable, + const char *bo_name) +{ + if (likely(!brw->perf_debug) || !drm_intel_bo_busy(bo)) + return drm_intel_bo_map(bo, write_enable); + + double start_time = get_time(); + + int ret = drm_intel_bo_map(bo, write_enable); + + perf_debug("CPU mapping a busy %s BO stalled and took %.03f ms.\n", + bo_name, (get_time() - start_time) * 1000); + + return ret; +} + +int +brw_bo_map_gtt(struct brw_context *brw, drm_intel_bo *bo, const char *bo_name) +{ + if (likely(!brw->perf_debug) || !drm_intel_bo_busy(bo)) + return drm_intel_gem_bo_map_gtt(bo); + + double start_time = get_time(); + + int ret = drm_intel_gem_bo_map_gtt(bo); + + perf_debug("GTT mapping a busy %s BO stalled and took %.03f ms.\n", + bo_name, (get_time() - start_time) * 1000); + + return ret; +} + +static void +mark_buffer_gpu_usage(struct intel_buffer_object *intel_obj, + uint32_t offset, uint32_t size) +{ + intel_obj->gpu_active_start = MIN2(intel_obj->gpu_active_start, offset); + intel_obj->gpu_active_end = MAX2(intel_obj->gpu_active_end, offset + size); +} + +static void +mark_buffer_inactive(struct intel_buffer_object *intel_obj) +{ + intel_obj->gpu_active_start = ~0; + intel_obj->gpu_active_end = 0; +} + +/** Allocates a new drm_intel_bo to store the data for the buffer object. */ +static void +alloc_buffer_object(struct brw_context *brw, + struct intel_buffer_object *intel_obj) +{ + intel_obj->buffer = drm_intel_bo_alloc(brw->bufmgr, "bufferobj", + intel_obj->Base.Size, 64); + + /* the buffer might be bound as a uniform buffer, need to update it + */ + if (intel_obj->Base.UsageHistory & USAGE_UNIFORM_BUFFER) + brw->ctx.NewDriverState |= BRW_NEW_UNIFORM_BUFFER; + if (intel_obj->Base.UsageHistory & USAGE_SHADER_STORAGE_BUFFER) + brw->ctx.NewDriverState |= BRW_NEW_UNIFORM_BUFFER; + if (intel_obj->Base.UsageHistory & USAGE_TEXTURE_BUFFER) + brw->ctx.NewDriverState |= BRW_NEW_TEXTURE_BUFFER; + if (intel_obj->Base.UsageHistory & USAGE_ATOMIC_COUNTER_BUFFER) + brw->ctx.NewDriverState |= BRW_NEW_ATOMIC_BUFFER; + + mark_buffer_inactive(intel_obj); +} + +static void +release_buffer(struct intel_buffer_object *intel_obj) +{ + drm_intel_bo_unreference(intel_obj->buffer); + intel_obj->buffer = NULL; +} + +/** + * The NewBufferObject() driver hook. + * + * Allocates a new intel_buffer_object structure and initializes it. + * + * There is some duplication between mesa's bufferobjects and our + * bufmgr buffers. Both have an integer handle and a hashtable to + * lookup an opaque structure. It would be nice if the handles and + * internal structure where somehow shared. + */ +static struct gl_buffer_object * +brw_new_buffer_object(struct gl_context * ctx, GLuint name) +{ + struct intel_buffer_object *obj = CALLOC_STRUCT(intel_buffer_object); + if (!obj) { + _mesa_error_no_memory(__func__); + } + + _mesa_initialize_buffer_object(ctx, &obj->Base, name); + + obj->buffer = NULL; + + return &obj->Base; +} + +/** + * The DeleteBuffer() driver hook. + * + * Deletes a single OpenGL buffer object. Used by glDeleteBuffers(). + */ +static void +brw_delete_buffer(struct gl_context * ctx, struct gl_buffer_object *obj) +{ + struct intel_buffer_object *intel_obj = intel_buffer_object(obj); + + assert(intel_obj); + + /* Buffer objects are automatically unmapped when deleting according + * to the spec, but Mesa doesn't do UnmapBuffer for us at context destroy + * (though it does if you call glDeleteBuffers) + */ + _mesa_buffer_unmap_all_mappings(ctx, obj); + + drm_intel_bo_unreference(intel_obj->buffer); + free(intel_obj); +} + + +/** + * The BufferData() driver hook. + * + * Implements glBufferData(), which recreates a buffer object's data store + * and populates it with the given data, if present. + * + * Any data that was previously stored in the buffer object is lost. + * + * \return true for success, false if out of memory + */ +static GLboolean +brw_buffer_data(struct gl_context *ctx, + GLenum target, + GLsizeiptrARB size, + const GLvoid *data, + GLenum usage, + GLbitfield storageFlags, + struct gl_buffer_object *obj) +{ + struct brw_context *brw = brw_context(ctx); + struct intel_buffer_object *intel_obj = intel_buffer_object(obj); + + /* Part of the ABI, but this function doesn't use it. + */ + (void) target; + + intel_obj->Base.Size = size; + intel_obj->Base.Usage = usage; + intel_obj->Base.StorageFlags = storageFlags; + + assert(!obj->Mappings[MAP_USER].Pointer); /* Mesa should have unmapped it */ + assert(!obj->Mappings[MAP_INTERNAL].Pointer); + + if (intel_obj->buffer != NULL) + release_buffer(intel_obj); + + if (size != 0) { + alloc_buffer_object(brw, intel_obj); + if (!intel_obj->buffer) + return false; + + if (data != NULL) + drm_intel_bo_subdata(intel_obj->buffer, 0, size, data); + } + + return true; +} + + +/** + * The BufferSubData() driver hook. + * + * Implements glBufferSubData(), which replaces a portion of the data in a + * buffer object. + * + * If the data range specified by (size + offset) extends beyond the end of + * the buffer or if data is NULL, no copy is performed. + */ +static void +brw_buffer_subdata(struct gl_context *ctx, + GLintptrARB offset, + GLsizeiptrARB size, + const GLvoid *data, + struct gl_buffer_object *obj) +{ + struct brw_context *brw = brw_context(ctx); + struct intel_buffer_object *intel_obj = intel_buffer_object(obj); + bool busy; + + if (size == 0) + return; + + assert(intel_obj); + + /* See if we can unsynchronized write the data into the user's BO. This + * avoids GPU stalls in unfortunately common user patterns (uploading + * sequentially into a BO, with draw calls in between each upload). + * + * Once we've hit this path, we mark this GL BO as preferring stalling to + * blits, so that we can hopefully hit this path again in the future + * (otherwise, an app that might occasionally stall but mostly not will end + * up with blitting all the time, at the cost of bandwidth) + */ + if (offset + size <= intel_obj->gpu_active_start || + intel_obj->gpu_active_end <= offset) { + if (brw->has_llc) { + drm_intel_gem_bo_map_unsynchronized(intel_obj->buffer); + memcpy(intel_obj->buffer->virtual + offset, data, size); + drm_intel_bo_unmap(intel_obj->buffer); + + if (intel_obj->gpu_active_end > intel_obj->gpu_active_start) + intel_obj->prefer_stall_to_blit = true; + return; + } else { + perf_debug("BufferSubData could be unsynchronized, but !LLC doesn't support it yet\n"); + } + } + + busy = + drm_intel_bo_busy(intel_obj->buffer) || + drm_intel_bo_references(brw->batch.bo, intel_obj->buffer); + + if (busy) { + if (size == intel_obj->Base.Size) { + /* Replace the current busy bo so the subdata doesn't stall. */ + drm_intel_bo_unreference(intel_obj->buffer); + alloc_buffer_object(brw, intel_obj); + } else if (!intel_obj->prefer_stall_to_blit) { + perf_debug("Using a blit copy to avoid stalling on " + "glBufferSubData(%ld, %ld) (%ldkb) to a busy " + "(%d-%d) buffer object.\n", + (long)offset, (long)offset + size, (long)(size/1024), + intel_obj->gpu_active_start, + intel_obj->gpu_active_end); + drm_intel_bo *temp_bo = + drm_intel_bo_alloc(brw->bufmgr, "subdata temp", size, 64); + + drm_intel_bo_subdata(temp_bo, 0, size, data); + + intel_emit_linear_blit(brw, + intel_obj->buffer, offset, + temp_bo, 0, + size); + + drm_intel_bo_unreference(temp_bo); + return; + } else { + perf_debug("Stalling on glBufferSubData(%ld, %ld) (%ldkb) to a busy " + "(%d-%d) buffer object. Use glMapBufferRange() to " + "avoid this.\n", + (long)offset, (long)offset + size, (long)(size/1024), + intel_obj->gpu_active_start, + intel_obj->gpu_active_end); + intel_batchbuffer_flush(brw); + } + } + + drm_intel_bo_subdata(intel_obj->buffer, offset, size, data); + mark_buffer_inactive(intel_obj); +} + + +/** + * The GetBufferSubData() driver hook. + * + * Implements glGetBufferSubData(), which copies a subrange of a buffer + * object into user memory. + */ +static void +brw_get_buffer_subdata(struct gl_context *ctx, + GLintptrARB offset, + GLsizeiptrARB size, + GLvoid *data, + struct gl_buffer_object *obj) +{ + struct intel_buffer_object *intel_obj = intel_buffer_object(obj); + struct brw_context *brw = brw_context(ctx); + + assert(intel_obj); + if (drm_intel_bo_references(brw->batch.bo, intel_obj->buffer)) { + intel_batchbuffer_flush(brw); + } + drm_intel_bo_get_subdata(intel_obj->buffer, offset, size, data); + + mark_buffer_inactive(intel_obj); +} + + +/** + * The MapBufferRange() driver hook. + * + * This implements both glMapBufferRange() and glMapBuffer(). + * + * The goal of this extension is to allow apps to accumulate their rendering + * at the same time as they accumulate their buffer object. Without it, + * you'd end up blocking on execution of rendering every time you mapped + * the buffer to put new data in. + * + * We support it in 3 ways: If unsynchronized, then don't bother + * flushing the batchbuffer before mapping the buffer, which can save blocking + * in many cases. If we would still block, and they allow the whole buffer + * to be invalidated, then just allocate a new buffer to replace the old one. + * If not, and we'd block, and they allow the subrange of the buffer to be + * invalidated, then we can make a new little BO, let them write into that, + * and blit it into the real BO at unmap time. + */ +static void * +brw_map_buffer_range(struct gl_context *ctx, + GLintptr offset, GLsizeiptr length, + GLbitfield access, struct gl_buffer_object *obj, + gl_map_buffer_index index) +{ + struct brw_context *brw = brw_context(ctx); + struct intel_buffer_object *intel_obj = intel_buffer_object(obj); + + assert(intel_obj); + + /* _mesa_MapBufferRange (GL entrypoint) sets these, but the vbo module also + * internally uses our functions directly. + */ + obj->Mappings[index].Offset = offset; + obj->Mappings[index].Length = length; + obj->Mappings[index].AccessFlags = access; + + if (intel_obj->buffer == NULL) { + obj->Mappings[index].Pointer = NULL; + return NULL; + } + + /* If the access is synchronized (like a normal buffer mapping), then get + * things flushed out so the later mapping syncs appropriately through GEM. + * If the user doesn't care about existing buffer contents and mapping would + * cause us to block, then throw out the old buffer. + * + * If they set INVALIDATE_BUFFER, we can pitch the current contents to + * achieve the required synchronization. + */ + if (!(access & GL_MAP_UNSYNCHRONIZED_BIT)) { + if (drm_intel_bo_references(brw->batch.bo, intel_obj->buffer)) { + if (access & GL_MAP_INVALIDATE_BUFFER_BIT) { + drm_intel_bo_unreference(intel_obj->buffer); + alloc_buffer_object(brw, intel_obj); + } else { + perf_debug("Stalling on the GPU for mapping a busy buffer " + "object\n"); + intel_batchbuffer_flush(brw); + } + } else if (drm_intel_bo_busy(intel_obj->buffer) && + (access & GL_MAP_INVALIDATE_BUFFER_BIT)) { + drm_intel_bo_unreference(intel_obj->buffer); + alloc_buffer_object(brw, intel_obj); + } + } + + /* If the user is mapping a range of an active buffer object but + * doesn't require the current contents of that range, make a new + * BO, and we'll copy what they put in there out at unmap or + * FlushRange time. + * + * That is, unless they're looking for a persistent mapping -- we would + * need to do blits in the MemoryBarrier call, and it's easier to just do a + * GPU stall and do a mapping. + */ + if (!(access & (GL_MAP_UNSYNCHRONIZED_BIT | GL_MAP_PERSISTENT_BIT)) && + (access & GL_MAP_INVALIDATE_RANGE_BIT) && + drm_intel_bo_busy(intel_obj->buffer)) { + /* Ensure that the base alignment of the allocation meets the alignment + * guarantees the driver has advertised to the application. + */ + const unsigned alignment = ctx->Const.MinMapBufferAlignment; + + intel_obj->map_extra[index] = (uintptr_t) offset % alignment; + intel_obj->range_map_bo[index] = drm_intel_bo_alloc(brw->bufmgr, + "BO blit temp", + length + + intel_obj->map_extra[index], + alignment); + if (brw->has_llc) { + brw_bo_map(brw, intel_obj->range_map_bo[index], + (access & GL_MAP_WRITE_BIT) != 0, "range-map"); + } else { + drm_intel_gem_bo_map_gtt(intel_obj->range_map_bo[index]); + } + obj->Mappings[index].Pointer = + intel_obj->range_map_bo[index]->virtual + intel_obj->map_extra[index]; + return obj->Mappings[index].Pointer; + } + + if (access & GL_MAP_UNSYNCHRONIZED_BIT) { + if (!brw->has_llc && brw->perf_debug && + drm_intel_bo_busy(intel_obj->buffer)) { + perf_debug("MapBufferRange with GL_MAP_UNSYNCHRONIZED_BIT stalling (it's actually synchronized on non-LLC platforms)\n"); + } + drm_intel_gem_bo_map_unsynchronized(intel_obj->buffer); + } else if (!brw->has_llc && (!(access & GL_MAP_READ_BIT) || + (access & GL_MAP_PERSISTENT_BIT))) { + drm_intel_gem_bo_map_gtt(intel_obj->buffer); + mark_buffer_inactive(intel_obj); + } else { + brw_bo_map(brw, intel_obj->buffer, (access & GL_MAP_WRITE_BIT) != 0, + "MapBufferRange"); + mark_buffer_inactive(intel_obj); + } + + obj->Mappings[index].Pointer = intel_obj->buffer->virtual + offset; + return obj->Mappings[index].Pointer; +} + +/** + * The FlushMappedBufferRange() driver hook. + * + * Implements glFlushMappedBufferRange(), which signifies that modifications + * have been made to a range of a mapped buffer, and it should be flushed. + * + * This is only used for buffers mapped with GL_MAP_FLUSH_EXPLICIT_BIT. + * + * Ideally we'd use a BO to avoid taking up cache space for the temporary + * data, but FlushMappedBufferRange may be followed by further writes to + * the pointer, so we would have to re-map after emitting our blit, which + * would defeat the point. + */ +static void +brw_flush_mapped_buffer_range(struct gl_context *ctx, + GLintptr offset, GLsizeiptr length, + struct gl_buffer_object *obj, + gl_map_buffer_index index) +{ + struct brw_context *brw = brw_context(ctx); + struct intel_buffer_object *intel_obj = intel_buffer_object(obj); + + assert(obj->Mappings[index].AccessFlags & GL_MAP_FLUSH_EXPLICIT_BIT); + + /* If we gave a direct mapping of the buffer instead of using a temporary, + * then there's nothing to do. + */ + if (intel_obj->range_map_bo[index] == NULL) + return; + + if (length == 0) + return; + + /* Note that we're not unmapping our buffer while executing the blit. We + * need to have a mapping still at the end of this call, since the user + * gets to make further modifications and glFlushMappedBufferRange() calls. + * This is safe, because: + * + * - On LLC platforms, we're using a CPU mapping that's coherent with the + * GPU (except for the render caches), so the kernel doesn't need to do + * any flushing work for us except for what happens at batch exec time + * anyway. + * + * - On non-LLC platforms, we're using a GTT mapping that writes directly + * to system memory (except for the chipset cache that gets flushed at + * batch exec time). + * + * In both cases we don't need to stall for the previous blit to complete + * so we can re-map (and we definitely don't want to, since that would be + * slow): If the user edits a part of their buffer that's previously been + * blitted, then our lack of synchoronization is fine, because either + * they'll get some too-new data in the first blit and not do another blit + * of that area (but in that case the results are undefined), or they'll do + * another blit of that area and the complete newer data will land the + * second time. + */ + intel_emit_linear_blit(brw, + intel_obj->buffer, + obj->Mappings[index].Offset + offset, + intel_obj->range_map_bo[index], + intel_obj->map_extra[index] + offset, + length); + mark_buffer_gpu_usage(intel_obj, + obj->Mappings[index].Offset + offset, + length); +} + + +/** + * The UnmapBuffer() driver hook. + * + * Implements glUnmapBuffer(). + */ +static GLboolean +brw_unmap_buffer(struct gl_context *ctx, + struct gl_buffer_object *obj, + gl_map_buffer_index index) +{ + struct brw_context *brw = brw_context(ctx); + struct intel_buffer_object *intel_obj = intel_buffer_object(obj); + + assert(intel_obj); + assert(obj->Mappings[index].Pointer); + if (intel_obj->range_map_bo[index] != NULL) { + drm_intel_bo_unmap(intel_obj->range_map_bo[index]); + + if (!(obj->Mappings[index].AccessFlags & GL_MAP_FLUSH_EXPLICIT_BIT)) { + intel_emit_linear_blit(brw, + intel_obj->buffer, obj->Mappings[index].Offset, + intel_obj->range_map_bo[index], + intel_obj->map_extra[index], + obj->Mappings[index].Length); + mark_buffer_gpu_usage(intel_obj, obj->Mappings[index].Offset, + obj->Mappings[index].Length); + } + + /* Since we've emitted some blits to buffers that will (likely) be used + * in rendering operations in other cache domains in this batch, emit a + * flush. Once again, we wish for a domain tracker in libdrm to cover + * usage inside of a batchbuffer. + */ + brw_emit_mi_flush(brw); + + drm_intel_bo_unreference(intel_obj->range_map_bo[index]); + intel_obj->range_map_bo[index] = NULL; + } else if (intel_obj->buffer != NULL) { + drm_intel_bo_unmap(intel_obj->buffer); + } + obj->Mappings[index].Pointer = NULL; + obj->Mappings[index].Offset = 0; + obj->Mappings[index].Length = 0; + + return true; +} + +/** + * Gets a pointer to the object's BO, and marks the given range as being used + * on the GPU. + * + * Anywhere that uses buffer objects in the pipeline should be using this to + * mark the range of the buffer that is being accessed by the pipeline. + */ +drm_intel_bo * +intel_bufferobj_buffer(struct brw_context *brw, + struct intel_buffer_object *intel_obj, + uint32_t offset, uint32_t size) +{ + /* This is needed so that things like transform feedback and texture buffer + * objects that need a BO but don't want to check that they exist for + * draw-time validation can just always get a BO from a GL buffer object. + */ + if (intel_obj->buffer == NULL) + alloc_buffer_object(brw, intel_obj); + + mark_buffer_gpu_usage(intel_obj, offset, size); + + return intel_obj->buffer; +} + +/** + * The CopyBufferSubData() driver hook. + * + * Implements glCopyBufferSubData(), which copies a portion of one buffer + * object's data to another. Independent source and destination offsets + * are allowed. + */ +static void +brw_copy_buffer_subdata(struct gl_context *ctx, + struct gl_buffer_object *src, + struct gl_buffer_object *dst, + GLintptr read_offset, GLintptr write_offset, + GLsizeiptr size) +{ + struct brw_context *brw = brw_context(ctx); + struct intel_buffer_object *intel_src = intel_buffer_object(src); + struct intel_buffer_object *intel_dst = intel_buffer_object(dst); + drm_intel_bo *src_bo, *dst_bo; + + if (size == 0) + return; + + dst_bo = intel_bufferobj_buffer(brw, intel_dst, write_offset, size); + src_bo = intel_bufferobj_buffer(brw, intel_src, read_offset, size); + + intel_emit_linear_blit(brw, + dst_bo, write_offset, + src_bo, read_offset, size); + + /* Since we've emitted some blits to buffers that will (likely) be used + * in rendering operations in other cache domains in this batch, emit a + * flush. Once again, we wish for a domain tracker in libdrm to cover + * usage inside of a batchbuffer. + */ + brw_emit_mi_flush(brw); +} + +void +intelInitBufferObjectFuncs(struct dd_function_table *functions) +{ + functions->NewBufferObject = brw_new_buffer_object; + functions->DeleteBuffer = brw_delete_buffer; + functions->BufferData = brw_buffer_data; + functions->BufferSubData = brw_buffer_subdata; + functions->GetBufferSubData = brw_get_buffer_subdata; + functions->MapBufferRange = brw_map_buffer_range; + functions->FlushMappedBufferRange = brw_flush_mapped_buffer_range; + functions->UnmapBuffer = brw_unmap_buffer; + functions->CopyBufferSubData = brw_copy_buffer_subdata; +}