--- /dev/null
+/*
+ * 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/streaming-load-memcpy.h"
+#include "main/bufferobj.h"
+#include "x86/common_x86_asm.h"
+
+#include "brw_context.h"
+#include "brw_blorp.h"
+#include "intel_buffer_objects.h"
+#include "intel_batchbuffer.h"
+
+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;
+}
+
+static void
+mark_buffer_valid_data(struct intel_buffer_object *intel_obj,
+ uint32_t offset, uint32_t size)
+{
+ intel_obj->valid_data_start = MIN2(intel_obj->valid_data_start, offset);
+ intel_obj->valid_data_end = MAX2(intel_obj->valid_data_end, offset + size);
+}
+
+static void
+mark_buffer_invalid(struct intel_buffer_object *intel_obj)
+{
+ intel_obj->valid_data_start = ~0;
+ intel_obj->valid_data_end = 0;
+}
+
+/** Allocates a new brw_bo to store the data for the buffer object. */
+static void
+alloc_buffer_object(struct brw_context *brw,
+ struct intel_buffer_object *intel_obj)
+{
+ const struct gl_context *ctx = &brw->ctx;
+
+ uint64_t size = intel_obj->Base.Size;
+ if (ctx->Const.RobustAccess) {
+ /* Pad out buffer objects with an extra 2kB (half a page).
+ *
+ * When pushing UBOs, we need to safeguard against 3DSTATE_CONSTANT_*
+ * reading out of bounds memory. The application might bind a UBO that's
+ * smaller than what the program expects. Ideally, we'd bind an extra
+ * push buffer containing zeros, but we have a limited number of those,
+ * so it's not always viable. Our only safe option is to pad all buffer
+ * objects by the maximum push data length, so that it will never read
+ * past the end of a BO.
+ *
+ * This is unfortunate, but it should result in at most 1 extra page,
+ * which probably isn't too terrible.
+ */
+ size += 64 * 32; /* max read length of 64 256-bit units */
+ }
+ intel_obj->buffer =
+ brw_bo_alloc(brw->bufmgr, "bufferobj", size, BRW_MEMZONE_OTHER);
+
+ /* 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_UNIFORM_BUFFER;
+
+ mark_buffer_inactive(intel_obj);
+ mark_buffer_invalid(intel_obj);
+}
+
+static void
+release_buffer(struct intel_buffer_object *intel_obj)
+{
+ brw_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__);
+ return NULL;
+ }
+
+ _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);
+
+ brw_bo_unreference(intel_obj->buffer);
+ _mesa_delete_buffer_object(ctx, 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) {
+ brw_bo_subdata(intel_obj->buffer, 0, size, data);
+ mark_buffer_valid_data(intel_obj, 0, size);
+ }
+ }
+
+ 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 ||
+ offset + size <= intel_obj->valid_data_start ||
+ intel_obj->valid_data_end <= offset) {
+ void *map = brw_bo_map(brw, intel_obj->buffer, MAP_WRITE | MAP_ASYNC);
+ memcpy(map + offset, data, size);
+ brw_bo_unmap(intel_obj->buffer);
+
+ if (intel_obj->gpu_active_end > intel_obj->gpu_active_start)
+ intel_obj->prefer_stall_to_blit = true;
+
+ mark_buffer_valid_data(intel_obj, offset, size);
+ return;
+ }
+
+ busy =
+ brw_bo_busy(intel_obj->buffer) ||
+ brw_batch_references(&brw->batch, intel_obj->buffer);
+
+ if (busy) {
+ if (size == intel_obj->Base.Size ||
+ (intel_obj->valid_data_start >= offset &&
+ intel_obj->valid_data_end <= offset + size)) {
+ /* Replace the current busy bo so the subdata doesn't stall. */
+ brw_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) / valid (%d-%d) buffer object.\n",
+ (long)offset, (long)offset + size, (long)(size/1024),
+ intel_obj->gpu_active_start,
+ intel_obj->gpu_active_end,
+ intel_obj->valid_data_start,
+ intel_obj->valid_data_end);
+ struct brw_bo *temp_bo =
+ brw_bo_alloc(brw->bufmgr, "subdata temp", size, BRW_MEMZONE_OTHER);
+
+ brw_bo_subdata(temp_bo, 0, size, data);
+
+ brw_blorp_copy_buffers(brw,
+ temp_bo, 0,
+ intel_obj->buffer, offset,
+ size);
+ brw_emit_mi_flush(brw);
+
+ brw_bo_unreference(temp_bo);
+ mark_buffer_valid_data(intel_obj, offset, size);
+ 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);
+ }
+ }
+
+ brw_bo_subdata(intel_obj->buffer, offset, size, data);
+ mark_buffer_inactive(intel_obj);
+ mark_buffer_valid_data(intel_obj, offset, size);
+}
+
+/* Typedef for memcpy function (used in brw_get_buffer_subdata below). */
+typedef void *(*mem_copy_fn)(void *dest, const void *src, size_t n);
+
+/**
+ * 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 (brw_batch_references(&brw->batch, intel_obj->buffer)) {
+ intel_batchbuffer_flush(brw);
+ }
+
+ unsigned int map_flags = MAP_READ;
+ mem_copy_fn memcpy_fn = memcpy;
+#ifdef USE_SSE41
+ if (!intel_obj->buffer->cache_coherent && cpu_has_sse4_1) {
+ /* Rather than acquire a new WB mmaping of the buffer object and pull
+ * it into the CPU cache, keep using the WC mmap that we have for writes,
+ * and use the magic movntd instructions instead.
+ */
+ map_flags |= MAP_COHERENT;
+ memcpy_fn = (mem_copy_fn) _mesa_streaming_load_memcpy;
+ }
+#endif
+
+ void *map = brw_bo_map(brw, intel_obj->buffer, map_flags);
+ if (unlikely(!map)) {
+ _mesa_error_no_memory(__func__);
+ return;
+ }
+ memcpy_fn(data, map + offset, size);
+ brw_bo_unmap(intel_obj->buffer);
+
+ 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);
+
+ STATIC_ASSERT(GL_MAP_UNSYNCHRONIZED_BIT == MAP_ASYNC);
+ STATIC_ASSERT(GL_MAP_WRITE_BIT == MAP_WRITE);
+ STATIC_ASSERT(GL_MAP_READ_BIT == MAP_READ);
+ STATIC_ASSERT(GL_MAP_PERSISTENT_BIT == MAP_PERSISTENT);
+ STATIC_ASSERT(GL_MAP_COHERENT_BIT == MAP_COHERENT);
+ assert((access & MAP_INTERNAL_MASK) == 0);
+
+ /* _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 (brw_batch_references(&brw->batch, intel_obj->buffer)) {
+ if (access & GL_MAP_INVALIDATE_BUFFER_BIT) {
+ brw_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 (brw_bo_busy(intel_obj->buffer) &&
+ (access & GL_MAP_INVALIDATE_BUFFER_BIT)) {
+ brw_bo_unreference(intel_obj->buffer);
+ alloc_buffer_object(brw, intel_obj);
+ }
+ }
+
+ if (access & MAP_WRITE)
+ mark_buffer_valid_data(intel_obj, offset, length);
+
+ /* 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) &&
+ brw_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] =
+ brw_bo_alloc(brw->bufmgr, "BO blit temp",
+ length + intel_obj->map_extra[index],
+ BRW_MEMZONE_OTHER);
+ void *map = brw_bo_map(brw, intel_obj->range_map_bo[index], access);
+ obj->Mappings[index].Pointer = map + intel_obj->map_extra[index];
+ return obj->Mappings[index].Pointer;
+ }
+
+ void *map = brw_bo_map(brw, intel_obj->buffer, access);
+ if (!(access & GL_MAP_UNSYNCHRONIZED_BIT)) {
+ mark_buffer_inactive(intel_obj);
+ }
+
+ obj->Mappings[index].Pointer = map + 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.
+ */
+ brw_blorp_copy_buffers(brw,
+ intel_obj->range_map_bo[index],
+ intel_obj->map_extra[index] + offset,
+ intel_obj->buffer,
+ obj->Mappings[index].Offset + offset,
+ length);
+ mark_buffer_gpu_usage(intel_obj,
+ obj->Mappings[index].Offset + offset,
+ length);
+ brw_emit_mi_flush(brw);
+}
+
+
+/**
+ * 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) {
+ brw_bo_unmap(intel_obj->range_map_bo[index]);
+
+ if (!(obj->Mappings[index].AccessFlags & GL_MAP_FLUSH_EXPLICIT_BIT)) {
+ brw_blorp_copy_buffers(brw,
+ intel_obj->range_map_bo[index],
+ intel_obj->map_extra[index],
+ intel_obj->buffer, obj->Mappings[index].Offset,
+ obj->Mappings[index].Length);
+ mark_buffer_gpu_usage(intel_obj, obj->Mappings[index].Offset,
+ obj->Mappings[index].Length);
+ brw_emit_mi_flush(brw);
+ }
+
+ /* 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_bo_unreference(intel_obj->range_map_bo[index]);
+ intel_obj->range_map_bo[index] = NULL;
+ } else if (intel_obj->buffer != NULL) {
+ brw_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.
+ */
+struct brw_bo *
+intel_bufferobj_buffer(struct brw_context *brw,
+ struct intel_buffer_object *intel_obj,
+ uint32_t offset, uint32_t size, bool write)
+{
+ /* 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);
+
+ /* If writing, (conservatively) mark this section as having valid data. */
+ if (write)
+ mark_buffer_valid_data(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);
+ struct brw_bo *src_bo, *dst_bo;
+
+ if (size == 0)
+ return;
+
+ dst_bo = intel_bufferobj_buffer(brw, intel_dst, write_offset, size, true);
+ src_bo = intel_bufferobj_buffer(brw, intel_src, read_offset, size, false);
+
+ brw_blorp_copy_buffers(brw,
+ src_bo, read_offset,
+ dst_bo, write_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;
+}
projects / mesa.git / blobdiff