| /* |
| * Copyright 2003 VMware, Inc. |
| * Copyright © 2007 Intel Corporation |
| * |
| * 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 |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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_upload.c |
| * |
| * Batched upload via BOs. |
| */ |
| |
| #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" |
| #include "intel_fbo.h" |
| #include "intel_mipmap_tree.h" |
| |
| #include "brw_context.h" |
| |
| #define INTEL_UPLOAD_SIZE (64*1024) |
| |
| void |
| intel_upload_finish(struct brw_context *brw) |
| { |
| if (!brw->upload.bo) |
| return; |
| |
| drm_intel_bo_unmap(brw->upload.bo); |
| drm_intel_bo_unreference(brw->upload.bo); |
| brw->upload.bo = NULL; |
| brw->upload.next_offset = 0; |
| } |
| |
| /** |
| * Interface for getting memory for uploading streamed data to the GPU |
| * |
| * In most cases, streamed data (for GPU state structures, for example) is |
| * uploaded through brw_state_batch(), since that interface allows relocations |
| * from the streamed space returned to other BOs. However, that interface has |
| * the restriction that the amount of space allocated has to be "small" (see |
| * estimated_max_prim_size in brw_draw.c). |
| * |
| * This interface, on the other hand, is able to handle arbitrary sized |
| * allocation requests, though it will batch small allocations into the same |
| * BO for efficiency and reduced memory footprint. |
| * |
| * \note The returned pointer is valid only until intel_upload_finish(), which |
| * will happen at batch flush or the next |
| * intel_upload_space()/intel_upload_data(). |
| * |
| * \param out_bo Pointer to a BO, which must point to a valid BO or NULL on |
| * entry, and will have a reference to the new BO containing the state on |
| * return. |
| * |
| * \param out_offset Offset within the buffer object that the data will land. |
| */ |
| void * |
| intel_upload_space(struct brw_context *brw, |
| uint32_t size, |
| uint32_t alignment, |
| drm_intel_bo **out_bo, |
| uint32_t *out_offset) |
| { |
| uint32_t offset; |
| |
| offset = ALIGN_NPOT(brw->upload.next_offset, alignment); |
| if (brw->upload.bo && offset + size > brw->upload.bo->size) { |
| intel_upload_finish(brw); |
| offset = 0; |
| } |
| |
| if (!brw->upload.bo) { |
| brw->upload.bo = drm_intel_bo_alloc(brw->bufmgr, "streamed data", |
| MAX2(INTEL_UPLOAD_SIZE, size), 4096); |
| if (brw->has_llc) |
| drm_intel_bo_map(brw->upload.bo, true); |
| else |
| drm_intel_gem_bo_map_gtt(brw->upload.bo); |
| } |
| |
| brw->upload.next_offset = offset + size; |
| |
| *out_offset = offset; |
| if (*out_bo != brw->upload.bo) { |
| drm_intel_bo_unreference(*out_bo); |
| *out_bo = brw->upload.bo; |
| drm_intel_bo_reference(brw->upload.bo); |
| } |
| |
| return brw->upload.bo->virtual + offset; |
| } |
| |
| /** |
| * Handy interface to upload some data to temporary GPU memory quickly. |
| * |
| * References to this memory should not be retained across batch flushes. |
| */ |
| void |
| intel_upload_data(struct brw_context *brw, |
| const void *data, |
| uint32_t size, |
| uint32_t alignment, |
| drm_intel_bo **out_bo, |
| uint32_t *out_offset) |
| { |
| void *dst = intel_upload_space(brw, size, alignment, out_bo, out_offset); |
| memcpy(dst, data, size); |
| } |