diff options
Diffstat (limited to 'intel/intel_bufmgr_gem.c')
| -rw-r--r-- | intel/intel_bufmgr_gem.c | 1722 |
1 files changed, 1722 insertions, 0 deletions
diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c new file mode 100644 index 00000000..87795f33 --- /dev/null +++ b/intel/intel_bufmgr_gem.c @@ -0,0 +1,1722 @@ +/************************************************************************** + * + * Copyright © 2007 Red Hat Inc. + * Copyright © 2007 Intel Corporation + * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA + * 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 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 + * THE COPYRIGHT HOLDERS, AUTHORS 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. + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * + **************************************************************************/ +/* + * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com> + * Keith Whitwell <keithw-at-tungstengraphics-dot-com> + * Eric Anholt <eric@anholt.net> + * Dave Airlie <airlied@linux.ie> + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <xf86drm.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <assert.h> +#include <pthread.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <sys/types.h> + +#include "errno.h" +#include "libdrm_lists.h" +#include "intel_atomic.h" +#include "intel_bufmgr.h" +#include "intel_bufmgr_priv.h" +#include "intel_chipset.h" +#include "string.h" + +#include "i915_drm.h" + +#define DBG(...) do { \ + if (bufmgr_gem->bufmgr.debug) \ + fprintf(stderr, __VA_ARGS__); \ +} while (0) + +typedef struct _drm_intel_bo_gem drm_intel_bo_gem; + +struct drm_intel_gem_bo_bucket { + drmMMListHead head; + unsigned long size; +}; + +/* Only cache objects up to 64MB. Bigger than that, and the rounding of the + * size makes many operations fail that wouldn't otherwise. + */ +#define DRM_INTEL_GEM_BO_BUCKETS 14 +typedef struct _drm_intel_bufmgr_gem { + drm_intel_bufmgr bufmgr; + + int fd; + + int max_relocs; + + pthread_mutex_t lock; + + struct drm_i915_gem_exec_object *exec_objects; + drm_intel_bo **exec_bos; + int exec_size; + int exec_count; + + /** Array of lists of cached gem objects of power-of-two sizes */ + struct drm_intel_gem_bo_bucket cache_bucket[DRM_INTEL_GEM_BO_BUCKETS]; + + uint64_t gtt_size; + int available_fences; + int pci_device; + char bo_reuse; +} drm_intel_bufmgr_gem; + +struct _drm_intel_bo_gem { + drm_intel_bo bo; + + atomic_t refcount; + uint32_t gem_handle; + const char *name; + + /** + * Kenel-assigned global name for this object + */ + unsigned int global_name; + + /** + * Index of the buffer within the validation list while preparing a + * batchbuffer execution. + */ + int validate_index; + + /** + * Current tiling mode + */ + uint32_t tiling_mode; + uint32_t swizzle_mode; + + time_t free_time; + + /** Array passed to the DRM containing relocation information. */ + struct drm_i915_gem_relocation_entry *relocs; + /** Array of bos corresponding to relocs[i].target_handle */ + drm_intel_bo **reloc_target_bo; + /** Number of entries in relocs */ + int reloc_count; + /** Mapped address for the buffer, saved across map/unmap cycles */ + void *mem_virtual; + /** GTT virtual address for the buffer, saved across map/unmap cycles */ + void *gtt_virtual; + + /** BO cache list */ + drmMMListHead head; + + /** + * Boolean of whether this BO and its children have been included in + * the current drm_intel_bufmgr_check_aperture_space() total. + */ + char included_in_check_aperture; + + /** + * Boolean of whether this buffer has been used as a relocation + * target and had its size accounted for, and thus can't have any + * further relocations added to it. + */ + char used_as_reloc_target; + + /** + * Boolean of whether this buffer can be re-used + */ + char reusable; + + /** + * Size in bytes of this buffer and its relocation descendents. + * + * Used to avoid costly tree walking in + * drm_intel_bufmgr_check_aperture in the common case. + */ + int reloc_tree_size; + + /** + * Number of potential fence registers required by this buffer and its + * relocations. + */ + int reloc_tree_fences; +}; + +static unsigned int +drm_intel_gem_estimate_batch_space(drm_intel_bo ** bo_array, int count); + +static unsigned int +drm_intel_gem_compute_batch_space(drm_intel_bo ** bo_array, int count); + +static int +drm_intel_gem_bo_get_tiling(drm_intel_bo *bo, uint32_t * tiling_mode, + uint32_t * swizzle_mode); + +static int +drm_intel_gem_bo_set_tiling(drm_intel_bo *bo, uint32_t * tiling_mode, + uint32_t stride); + +static void drm_intel_gem_bo_unreference_locked(drm_intel_bo *bo); +static void drm_intel_gem_bo_unreference_locked_timed(drm_intel_bo *bo, + time_t time); + +static void drm_intel_gem_bo_unreference(drm_intel_bo *bo); + +static void drm_intel_gem_bo_free(drm_intel_bo *bo); + +static unsigned long +drm_intel_gem_bo_tile_size(drm_intel_bufmgr_gem *bufmgr_gem, unsigned long size, + uint32_t *tiling_mode) +{ + unsigned long min_size, max_size; + unsigned long i; + + if (*tiling_mode == I915_TILING_NONE) + return size; + + /* 965+ just need multiples of page size for tiling */ + if (IS_I965G(bufmgr_gem)) + return ROUND_UP_TO(size, 4096); + + /* Older chips need powers of two, of at least 512k or 1M */ + if (IS_I9XX(bufmgr_gem)) { + min_size = 1024*1024; + max_size = 128*1024*1024; + } else { + min_size = 512*1024; + max_size = 64*1024*1024; + } + + if (size > max_size) { + *tiling_mode = I915_TILING_NONE; + return size; + } + + for (i = min_size; i < size; i <<= 1) + ; + + return i; +} + +/* + * Round a given pitch up to the minimum required for X tiling on a + * given chip. We use 512 as the minimum to allow for a later tiling + * change. + */ +static unsigned long +drm_intel_gem_bo_tile_pitch(drm_intel_bufmgr_gem *bufmgr_gem, + unsigned long pitch, uint32_t tiling_mode) +{ + unsigned long tile_width = 512; + unsigned long i; + + if (tiling_mode == I915_TILING_NONE) + return ROUND_UP_TO(pitch, tile_width); + + /* 965 is flexible */ + if (IS_I965G(bufmgr_gem)) + return ROUND_UP_TO(pitch, tile_width); + + /* Pre-965 needs power of two tile width */ + for (i = tile_width; i < pitch; i <<= 1) + ; + + return i; +} + +static struct drm_intel_gem_bo_bucket * +drm_intel_gem_bo_bucket_for_size(drm_intel_bufmgr_gem *bufmgr_gem, + unsigned long size) +{ + int i; + + for (i = 0; i < DRM_INTEL_GEM_BO_BUCKETS; i++) { + struct drm_intel_gem_bo_bucket *bucket = + &bufmgr_gem->cache_bucket[i]; + if (bucket->size >= size) { + return bucket; + } + } + + return NULL; +} + +static void +drm_intel_gem_dump_validation_list(drm_intel_bufmgr_gem *bufmgr_gem) +{ + int i, j; + + for (i = 0; i < bufmgr_gem->exec_count; i++) { + drm_intel_bo *bo = bufmgr_gem->exec_bos[i]; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + + if (bo_gem->relocs == NULL) { + DBG("%2d: %d (%s)\n", i, bo_gem->gem_handle, + bo_gem->name); + continue; + } + + for (j = 0; j < bo_gem->reloc_count; j++) { + drm_intel_bo *target_bo = bo_gem->reloc_target_bo[j]; + drm_intel_bo_gem *target_gem = + (drm_intel_bo_gem *) target_bo; + + DBG("%2d: %d (%s)@0x%08llx -> " + "%d (%s)@0x%08lx + 0x%08x\n", + i, + bo_gem->gem_handle, bo_gem->name, + (unsigned long long)bo_gem->relocs[j].offset, + target_gem->gem_handle, + target_gem->name, + target_bo->offset, + bo_gem->relocs[j].delta); + } + } +} + +static void +drm_intel_gem_bo_reference(drm_intel_bo *bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + + assert(atomic_read(&bo_gem->refcount) > 0); + atomic_inc(&bo_gem->refcount); +} + +/** + * Adds the given buffer to the list of buffers to be validated (moved into the + * appropriate memory type) with the next batch submission. + * + * If a buffer is validated multiple times in a batch submission, it ends up + * with the intersection of the memory type flags and the union of the + * access flags. + */ +static void +drm_intel_add_validate_buffer(drm_intel_bo *bo) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + int index; + + if (bo_gem->validate_index != -1) + return; + + /* Extend the array of validation entries as necessary. */ + if (bufmgr_gem->exec_count == bufmgr_gem->exec_size) { + int new_size = bufmgr_gem->exec_size * 2; + + if (new_size == 0) + new_size = 5; + + bufmgr_gem->exec_objects = + realloc(bufmgr_gem->exec_objects, + sizeof(*bufmgr_gem->exec_objects) * new_size); + bufmgr_gem->exec_bos = + realloc(bufmgr_gem->exec_bos, + sizeof(*bufmgr_gem->exec_bos) * new_size); + bufmgr_gem->exec_size = new_size; + } + + index = bufmgr_gem->exec_count; + bo_gem->validate_index = index; + /* Fill in array entry */ + bufmgr_gem->exec_objects[index].handle = bo_gem->gem_handle; + bufmgr_gem->exec_objects[index].relocation_count = bo_gem->reloc_count; + bufmgr_gem->exec_objects[index].relocs_ptr = (uintptr_t) bo_gem->relocs; + bufmgr_gem->exec_objects[index].alignment = 0; + bufmgr_gem->exec_objects[index].offset = 0; + bufmgr_gem->exec_bos[index] = bo; + drm_intel_gem_bo_reference(bo); + bufmgr_gem->exec_count++; +} + +#define RELOC_BUF_SIZE(x) ((I915_RELOC_HEADER + x * I915_RELOC0_STRIDE) * \ + sizeof(uint32_t)) + +static int +drm_intel_setup_reloc_list(drm_intel_bo *bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + unsigned int max_relocs = bufmgr_gem->max_relocs; + + if (bo->size / 4 < max_relocs) + max_relocs = bo->size / 4; + + bo_gem->relocs = malloc(max_relocs * + sizeof(struct drm_i915_gem_relocation_entry)); + bo_gem->reloc_target_bo = malloc(max_relocs * sizeof(drm_intel_bo *)); + + return 0; +} + +static int +drm_intel_gem_bo_busy(drm_intel_bo *bo) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_busy busy; + int ret; + + memset(&busy, 0, sizeof(busy)); + busy.handle = bo_gem->gem_handle; + + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_BUSY, &busy); + + return (ret == 0 && busy.busy); +} + +static int +drm_intel_gem_bo_madvise(drm_intel_bufmgr_gem *bufmgr_gem, + drm_intel_bo_gem *bo_gem, int state) +{ + struct drm_i915_gem_madvise madv; + + madv.handle = bo_gem->gem_handle; + madv.madv = state; + madv.retained = 1; + ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MADVISE, &madv); + + return madv.retained; +} + +/* drop the oldest entries that have been purged by the kernel */ +static void +drm_intel_gem_bo_cache_purge_bucket(drm_intel_bufmgr_gem *bufmgr_gem, + struct drm_intel_gem_bo_bucket *bucket) +{ + while (!DRMLISTEMPTY(&bucket->head)) { + drm_intel_bo_gem *bo_gem; + + bo_gem = DRMLISTENTRY(drm_intel_bo_gem, + bucket->head.next, head); + if (drm_intel_gem_bo_madvise + (bufmgr_gem, bo_gem, I915_MADV_DONTNEED)) + break; + + DRMLISTDEL(&bo_gem->head); + drm_intel_gem_bo_free(&bo_gem->bo); + } +} + +static drm_intel_bo * +drm_intel_gem_bo_alloc_internal(drm_intel_bufmgr *bufmgr, + const char *name, + unsigned long size, + unsigned long flags) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr; + drm_intel_bo_gem *bo_gem; + unsigned int page_size = getpagesize(); + int ret; + struct drm_intel_gem_bo_bucket *bucket; + int alloc_from_cache; + unsigned long bo_size; + int for_render = 0; + + if (flags & BO_ALLOC_FOR_RENDER) + for_render = 1; + + /* Round the allocated size up to a power of two number of pages. */ + bucket = drm_intel_gem_bo_bucket_for_size(bufmgr_gem, size); + + /* If we don't have caching at this size, don't actually round the + * allocation up. + */ + if (bucket == NULL) { + bo_size = size; + if (bo_size < page_size) + bo_size = page_size; + } else { + bo_size = bucket->size; + } + + pthread_mutex_lock(&bufmgr_gem->lock); + /* Get a buffer out of the cache if available */ +retry: + alloc_from_cache = 0; + if (bucket != NULL && !DRMLISTEMPTY(&bucket->head)) { + if (for_render) { + /* Allocate new render-target BOs from the tail (MRU) + * of the list, as it will likely be hot in the GPU + * cache and in the aperture for us. + */ + bo_gem = DRMLISTENTRY(drm_intel_bo_gem, + bucket->head.prev, head); + DRMLISTDEL(&bo_gem->head); + alloc_from_cache = 1; + } else { + /* For non-render-target BOs (where we're probably + * going to map it first thing in order to fill it + * with data), check if the last BO in the cache is + * unbusy, and only reuse in that case. Otherwise, + * allocating a new buffer is probably faster than + * waiting for the GPU to finish. + */ + bo_gem = DRMLISTENTRY(drm_intel_bo_gem, + bucket->head.next, head); + if (!drm_intel_gem_bo_busy(&bo_gem->bo)) { + alloc_from_cache = 1; + DRMLISTDEL(&bo_gem->head); + } + } + + if (alloc_from_cache) { + if (!drm_intel_gem_bo_madvise + (bufmgr_gem, bo_gem, I915_MADV_WILLNEED)) { + drm_intel_gem_bo_free(&bo_gem->bo); + drm_intel_gem_bo_cache_purge_bucket(bufmgr_gem, + bucket); + goto retry; + } + } + } + pthread_mutex_unlock(&bufmgr_gem->lock); + + if (!alloc_from_cache) { + struct drm_i915_gem_create create; + + bo_gem = calloc(1, sizeof(*bo_gem)); + if (!bo_gem) + return NULL; + + bo_gem->bo.size = bo_size; + memset(&create, 0, sizeof(create)); + create.size = bo_size; + + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_CREATE, &create); + bo_gem->gem_handle = create.handle; + bo_gem->bo.handle = bo_gem->gem_handle; + if (ret != 0) { + free(bo_gem); + return NULL; + } + bo_gem->bo.bufmgr = bufmgr; + } + + bo_gem->name = name; + atomic_set(&bo_gem->refcount, 1); + bo_gem->validate_index = -1; + bo_gem->reloc_tree_size = bo_gem->bo.size; + bo_gem->reloc_tree_fences = 0; + bo_gem->used_as_reloc_target = 0; + bo_gem->tiling_mode = I915_TILING_NONE; + bo_gem->swizzle_mode = I915_BIT_6_SWIZZLE_NONE; + bo_gem->reusable = 1; + + DBG("bo_create: buf %d (%s) %ldb\n", + bo_gem->gem_handle, bo_gem->name, size); + + return &bo_gem->bo; +} + +static drm_intel_bo * +drm_intel_gem_bo_alloc_for_render(drm_intel_bufmgr *bufmgr, + const char *name, + unsigned long size, + unsigned int alignment) +{ + return drm_intel_gem_bo_alloc_internal(bufmgr, name, size, + BO_ALLOC_FOR_RENDER); +} + +static drm_intel_bo * +drm_intel_gem_bo_alloc(drm_intel_bufmgr *bufmgr, + const char *name, + unsigned long size, + unsigned int alignment) +{ + return drm_intel_gem_bo_alloc_internal(bufmgr, name, size, 0); +} + +static drm_intel_bo * +drm_intel_gem_bo_alloc_tiled(drm_intel_bufmgr *bufmgr, const char *name, + int x, int y, int cpp, uint32_t *tiling_mode, + unsigned long *pitch, unsigned long flags) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bufmgr; + drm_intel_bo *bo; + unsigned long size, stride, aligned_y = y; + int ret; + + if (*tiling_mode == I915_TILING_NONE) + aligned_y = ALIGN(y, 2); + else if (*tiling_mode == I915_TILING_X) + aligned_y = ALIGN(y, 8); + else if (*tiling_mode == I915_TILING_Y) + aligned_y = ALIGN(y, 32); + + stride = x * cpp; + stride = drm_intel_gem_bo_tile_pitch(bufmgr_gem, stride, *tiling_mode); + size = stride * aligned_y; + size = drm_intel_gem_bo_tile_size(bufmgr_gem, size, tiling_mode); + + bo = drm_intel_gem_bo_alloc_internal(bufmgr, name, size, flags); + if (!bo) + return NULL; + + ret = drm_intel_gem_bo_set_tiling(bo, tiling_mode, stride); + if (ret != 0) { + drm_intel_gem_bo_unreference(bo); + return NULL; + } + + *pitch = stride; + + return bo; +} + +/** + * Returns a drm_intel_bo wrapping the given buffer object handle. + * + * This can be used when one application needs to pass a buffer object + * to another. + */ +drm_intel_bo * +drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr, + const char *name, + unsigned int handle) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr; + drm_intel_bo_gem *bo_gem; + int ret; + struct drm_gem_open open_arg; + struct drm_i915_gem_get_tiling get_tiling; + + bo_gem = calloc(1, sizeof(*bo_gem)); + if (!bo_gem) + return NULL; + + memset(&open_arg, 0, sizeof(open_arg)); + open_arg.name = handle; + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_OPEN, &open_arg); + if (ret != 0) { + fprintf(stderr, "Couldn't reference %s handle 0x%08x: %s\n", + name, handle, strerror(errno)); + free(bo_gem); + return NULL; + } + bo_gem->bo.size = open_arg.size; + bo_gem->bo.offset = 0; + bo_gem->bo.virtual = NULL; + bo_gem->bo.bufmgr = bufmgr; + bo_gem->name = name; + atomic_set(&bo_gem->refcount, 1); + bo_gem->validate_index = -1; + bo_gem->gem_handle = open_arg.handle; + bo_gem->global_name = handle; + bo_gem->reusable = 0; + + memset(&get_tiling, 0, sizeof(get_tiling)); + get_tiling.handle = bo_gem->gem_handle; + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling); + if (ret != 0) { + drm_intel_gem_bo_unreference(&bo_gem->bo); + return NULL; + } + bo_gem->tiling_mode = get_tiling.tiling_mode; + bo_gem->swizzle_mode = get_tiling.swizzle_mode; + if (bo_gem->tiling_mode == I915_TILING_NONE) + bo_gem->reloc_tree_fences = 0; + else + bo_gem->reloc_tree_fences = 1; + + DBG("bo_create_from_handle: %d (%s)\n", handle, bo_gem->name); + + return &bo_gem->bo; +} + +static void +drm_intel_gem_bo_free(drm_intel_bo *bo) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_gem_close close; + int ret; + + if (bo_gem->mem_virtual) + munmap(bo_gem->mem_virtual, bo_gem->bo.size); + if (bo_gem->gtt_virtual) + munmap(bo_gem->gtt_virtual, bo_gem->bo.size); + + free(bo_gem->reloc_target_bo); + free(bo_gem->relocs); + + /* Close this object */ + memset(&close, 0, sizeof(close)); + close.handle = bo_gem->gem_handle; + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_CLOSE, &close); + if (ret != 0) { + fprintf(stderr, + "DRM_IOCTL_GEM_CLOSE %d failed (%s): %s\n", + bo_gem->gem_handle, bo_gem->name, strerror(errno)); + } + free(bo); +} + +/** Frees all cached buffers significantly older than @time. */ +static void +drm_intel_gem_cleanup_bo_cache(drm_intel_bufmgr_gem *bufmgr_gem, time_t time) +{ + int i; + + for (i = 0; i < DRM_INTEL_GEM_BO_BUCKETS; i++) { + struct drm_intel_gem_bo_bucket *bucket = + &bufmgr_gem->cache_bucket[i]; + + while (!DRMLISTEMPTY(&bucket->head)) { + drm_intel_bo_gem *bo_gem; + + bo_gem = DRMLISTENTRY(drm_intel_bo_gem, + bucket->head.next, head); + if (time - bo_gem->free_time <= 1) + break; + + DRMLISTDEL(&bo_gem->head); + + drm_intel_gem_bo_free(&bo_gem->bo); + } + } +} + +static void +drm_intel_gem_bo_unreference_final(drm_intel_bo *bo, time_t time) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_intel_gem_bo_bucket *bucket; + uint32_t tiling_mode; + int i; + + /* Unreference all the target buffers */ + for (i = 0; i < bo_gem->reloc_count; i++) { + drm_intel_gem_bo_unreference_locked_timed(bo_gem-> + reloc_target_bo[i], + time); + } + + DBG("bo_unreference final: %d (%s)\n", + bo_gem->gem_handle, bo_gem->name); + + bucket = drm_intel_gem_bo_bucket_for_size(bufmgr_gem, bo->size); + /* Put the buffer into our internal cache for reuse if we can. */ + tiling_mode = I915_TILING_NONE; + if (bufmgr_gem->bo_reuse && bo_gem->reusable && bucket != NULL && + drm_intel_gem_bo_set_tiling(bo, &tiling_mode, 0) == 0) { + bo_gem->free_time = time; + + bo_gem->name = NULL; + bo_gem->validate_index = -1; + bo_gem->reloc_count = 0; + + DRMLISTADDTAIL(&bo_gem->head, &bucket->head); + + drm_intel_gem_bo_madvise(bufmgr_gem, bo_gem, + I915_MADV_DONTNEED); + drm_intel_gem_cleanup_bo_cache(bufmgr_gem, time); + } else { + drm_intel_gem_bo_free(bo); + } +} + +static void drm_intel_gem_bo_unreference_locked(drm_intel_bo *bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + + assert(atomic_read(&bo_gem->refcount) > 0); + if (atomic_dec_and_test(&bo_gem->refcount)) { + struct timespec time; + + clock_gettime(CLOCK_MONOTONIC, &time); + drm_intel_gem_bo_unreference_final(bo, time.tv_sec); + } +} + +static void drm_intel_gem_bo_unreference_locked_timed(drm_intel_bo *bo, + time_t time) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + + assert(atomic_read(&bo_gem->refcount) > 0); + if (atomic_dec_and_test(&bo_gem->refcount)) + drm_intel_gem_bo_unreference_final(bo, time); +} + +static void drm_intel_gem_bo_unreference(drm_intel_bo *bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + + assert(atomic_read(&bo_gem->refcount) > 0); + if (atomic_dec_and_test(&bo_gem->refcount)) { + drm_intel_bufmgr_gem *bufmgr_gem = + (drm_intel_bufmgr_gem *) bo->bufmgr; + struct timespec time; + + clock_gettime(CLOCK_MONOTONIC, &time); + + pthread_mutex_lock(&bufmgr_gem->lock); + drm_intel_gem_bo_unreference_final(bo, time.tv_sec); + pthread_mutex_unlock(&bufmgr_gem->lock); + } +} + +static int drm_intel_gem_bo_map(drm_intel_bo *bo, int write_enable) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_set_domain set_domain; + int ret; + + pthread_mutex_lock(&bufmgr_gem->lock); + + /* Allow recursive mapping. Mesa may recursively map buffers with + * nested display loops. + */ + if (!bo_gem->mem_virtual) { + struct drm_i915_gem_mmap mmap_arg; + + DBG("bo_map: %d (%s)\n", bo_gem->gem_handle, bo_gem->name); + + memset(&mmap_arg, 0, sizeof(mmap_arg)); + mmap_arg.handle = bo_gem->gem_handle; + mmap_arg.offset = 0; + mmap_arg.size = bo->size; + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg); + if (ret != 0) { + fprintf(stderr, + "%s:%d: Error mapping buffer %d (%s): %s .\n", + __FILE__, __LINE__, bo_gem->gem_handle, + bo_gem->name, strerror(errno)); + pthread_mutex_unlock(&bufmgr_gem->lock); + return ret; + } + bo_gem->mem_virtual = (void *)(uintptr_t) mmap_arg.addr_ptr; + } + DBG("bo_map: %d (%s) -> %p\n", bo_gem->gem_handle, bo_gem->name, + bo_gem->mem_virtual); + bo->virtual = bo_gem->mem_virtual; + + set_domain.handle = bo_gem->gem_handle; + set_domain.read_domains = I915_GEM_DOMAIN_CPU; + if (write_enable) + set_domain.write_domain = I915_GEM_DOMAIN_CPU; + else + set_domain.write_domain = 0; + do { + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, + &set_domain); + } while (ret == -1 && errno == EINTR); + if (ret != 0) { + fprintf(stderr, "%s:%d: Error setting to CPU domain %d: %s\n", + __FILE__, __LINE__, bo_gem->gem_handle, + strerror(errno)); + pthread_mutex_unlock(&bufmgr_gem->lock); + return ret; + } + + pthread_mutex_unlock(&bufmgr_gem->lock); + + return 0; +} + +int drm_intel_gem_bo_map_gtt(drm_intel_bo *bo) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_set_domain set_domain; + int ret; + + pthread_mutex_lock(&bufmgr_gem->lock); + + /* Get a mapping of the buffer if we haven't before. */ + if (bo_gem->gtt_virtual == NULL) { + struct drm_i915_gem_mmap_gtt mmap_arg; + + DBG("bo_map_gtt: mmap %d (%s)\n", bo_gem->gem_handle, + bo_gem->name); + + memset(&mmap_arg, 0, sizeof(mmap_arg)); + mmap_arg.handle = bo_gem->gem_handle; + + /* Get the fake offset back... */ + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, + &mmap_arg); + if (ret != 0) { + fprintf(stderr, + "%s:%d: Error preparing buffer map %d (%s): %s .\n", + __FILE__, __LINE__, + bo_gem->gem_handle, bo_gem->name, + strerror(errno)); + pthread_mutex_unlock(&bufmgr_gem->lock); + return ret; + } + + /* and mmap it */ + bo_gem->gtt_virtual = mmap(0, bo->size, PROT_READ | PROT_WRITE, + MAP_SHARED, bufmgr_gem->fd, + mmap_arg.offset); + if (bo_gem->gtt_virtual == MAP_FAILED) { + fprintf(stderr, + "%s:%d: Error mapping buffer %d (%s): %s .\n", + __FILE__, __LINE__, + bo_gem->gem_handle, bo_gem->name, + strerror(errno)); + pthread_mutex_unlock(&bufmgr_gem->lock); + return errno; + } + } + + bo->virtual = bo_gem->gtt_virtual; + + DBG("bo_map_gtt: %d (%s) -> %p\n", bo_gem->gem_handle, bo_gem->name, + bo_gem->gtt_virtual); + + /* Now move it to the GTT domain so that the CPU caches are flushed */ + set_domain.handle = bo_gem->gem_handle; + set_domain.read_domains = I915_GEM_DOMAIN_GTT; + set_domain.write_domain = I915_GEM_DOMAIN_GTT; + do { + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, + &set_domain); + } while (ret == -1 && errno == EINTR); + + if (ret != 0) { + fprintf(stderr, "%s:%d: Error setting domain %d: %s\n", + __FILE__, __LINE__, bo_gem->gem_handle, + strerror(errno)); + } + + pthread_mutex_unlock(&bufmgr_gem->lock); + + return 0; +} + +int drm_intel_gem_bo_unmap_gtt(drm_intel_bo *bo) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + int ret = 0; + + if (bo == NULL) + return 0; + + assert(bo_gem->gtt_virtual != NULL); + + pthread_mutex_lock(&bufmgr_gem->lock); + bo->virtual = NULL; + pthread_mutex_unlock(&bufmgr_gem->lock); + + return ret; +} + +static int drm_intel_gem_bo_unmap(drm_intel_bo *bo) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_sw_finish sw_finish; + int ret; + + if (bo == NULL) + return 0; + + assert(bo_gem->mem_virtual != NULL); + + pthread_mutex_lock(&bufmgr_gem->lock); + + /* Cause a flush to happen if the buffer's pinned for scanout, so the + * results show up in a timely manner. + */ + sw_finish.handle = bo_gem->gem_handle; + do { + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SW_FINISH, + &sw_finish); + } while (ret == -1 && errno == EINTR); + + bo->virtual = NULL; + pthread_mutex_unlock(&bufmgr_gem->lock); + return 0; +} + +static int +drm_intel_gem_bo_subdata(drm_intel_bo *bo, unsigned long offset, + unsigned long size, const void *data) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_pwrite pwrite; + int ret; + + memset(&pwrite, 0, sizeof(pwrite)); + pwrite.handle = bo_gem->gem_handle; + pwrite.offset = offset; + pwrite.size = size; + pwrite.data_ptr = (uint64_t) (uintptr_t) data; + do { + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite); + } while (ret == -1 && errno == EINTR); + if (ret != 0) { + fprintf(stderr, + "%s:%d: Error writing data to buffer %d: (%d %d) %s .\n", + __FILE__, __LINE__, bo_gem->gem_handle, (int)offset, + (int)size, strerror(errno)); + } + return 0; +} + +static int +drm_intel_gem_get_pipe_from_crtc_id(drm_intel_bufmgr *bufmgr, int crtc_id) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr; + struct drm_i915_get_pipe_from_crtc_id get_pipe_from_crtc_id; + int ret; + + get_pipe_from_crtc_id.crtc_id = crtc_id; + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID, + &get_pipe_from_crtc_id); + if (ret != 0) { + /* We return -1 here to signal that we don't + * know which pipe is associated with this crtc. + * This lets the caller know that this information + * isn't available; using the wrong pipe for + * vblank waiting can cause the chipset to lock up + */ + return -1; + } + + return get_pipe_from_crtc_id.pipe; +} + +static int +drm_intel_gem_bo_get_subdata(drm_intel_bo *bo, unsigned long offset, + unsigned long size, void *data) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_pread pread; + int ret; + + memset(&pread, 0, sizeof(pread)); + pread.handle = bo_gem->gem_handle; + pread.offset = offset; + pread.size = size; + pread.data_ptr = (uint64_t) (uintptr_t) data; + do { + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_PREAD, &pread); + } while (ret == -1 && errno == EINTR); + if (ret != 0) { + fprintf(stderr, + "%s:%d: Error reading data from buffer %d: (%d %d) %s .\n", + __FILE__, __LINE__, bo_gem->gem_handle, (int)offset, + (int)size, strerror(errno)); + } + return 0; +} + +/** Waits for all GPU rendering to the object to have completed. */ +static void +drm_intel_gem_bo_wait_rendering(drm_intel_bo *bo) +{ + drm_intel_gem_bo_start_gtt_access(bo, 0); +} + +/** + * Sets the object to the GTT read and possibly write domain, used by the X + * 2D driver in the absence of kernel support to do drm_intel_gem_bo_map_gtt(). + * + * In combination with drm_intel_gem_bo_pin() and manual fence management, we + * can do tiled pixmaps this way. + */ +void +drm_intel_gem_bo_start_gtt_access(drm_intel_bo *bo, int write_enable) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_set_domain set_domain; + int ret; + + set_domain.handle = bo_gem->gem_handle; + set_domain.read_domains = I915_GEM_DOMAIN_GTT; + set_domain.write_domain = write_enable ? I915_GEM_DOMAIN_GTT : 0; + do { + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, + &set_domain); + } while (ret == -1 && errno == EINTR); + if (ret != 0) { + fprintf(stderr, + "%s:%d: Error setting memory domains %d (%08x %08x): %s .\n", + __FILE__, __LINE__, bo_gem->gem_handle, + set_domain.read_domains, set_domain.write_domain, + strerror(errno)); + } +} + +static void +drm_intel_bufmgr_gem_destroy(drm_intel_bufmgr *bufmgr) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr; + int i; + + free(bufmgr_gem->exec_objects); + free(bufmgr_gem->exec_bos); + + pthread_mutex_destroy(&bufmgr_gem->lock); + + /* Free any cached buffer objects we were going to reuse */ + for (i = 0; i < DRM_INTEL_GEM_BO_BUCKETS; i++) { + struct drm_intel_gem_bo_bucket *bucket = + &bufmgr_gem->cache_bucket[i]; + drm_intel_bo_gem *bo_gem; + + while (!DRMLISTEMPTY(&bucket->head)) { + bo_gem = DRMLISTENTRY(drm_intel_bo_gem, + bucket->head.next, head); + DRMLISTDEL(&bo_gem->head); + + drm_intel_gem_bo_free(&bo_gem->bo); + } + } + + free(bufmgr); +} + +/** + * Adds the target buffer to the validation list and adds the relocation + * to the reloc_buffer's relocation list. + * + * The relocation entry at the given offset must already contain the + * precomputed relocation value, because the kernel will optimize out + * the relocation entry write when the buffer hasn't moved from the + * last known offset in target_bo. + */ +static int +drm_intel_gem_bo_emit_reloc(drm_intel_bo *bo, uint32_t offset, + drm_intel_bo *target_bo, uint32_t target_offset, + uint32_t read_domains, uint32_t write_domain) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + drm_intel_bo_gem *target_bo_gem = (drm_intel_bo_gem *) target_bo; + + pthread_mutex_lock(&bufmgr_gem->lock); + + /* Create a new relocation list if needed */ + if (bo_gem->relocs == NULL) + drm_intel_setup_reloc_list(bo); + + /* Check overflow */ + assert(bo_gem->reloc_count < bufmgr_gem->max_relocs); + + /* Check args */ + assert(offset <= bo->size - 4); + assert((write_domain & (write_domain - 1)) == 0); + + /* Make sure that we're not adding a reloc to something whose size has + * already been accounted for. + */ + assert(!bo_gem->used_as_reloc_target); + bo_gem->reloc_tree_size += target_bo_gem->reloc_tree_size; + bo_gem->reloc_tree_fences += target_bo_gem->reloc_tree_fences; + + /* Flag the target to disallow further relocations in it. */ + target_bo_gem->used_as_reloc_target = 1; + + bo_gem->relocs[bo_gem->reloc_count].offset = offset; + bo_gem->relocs[bo_gem->reloc_count].delta = target_offset; + bo_gem->relocs[bo_gem->reloc_count].target_handle = + target_bo_gem->gem_handle; + bo_gem->relocs[bo_gem->reloc_count].read_domains = read_domains; + bo_gem->relocs[bo_gem->reloc_count].write_domain = write_domain; + bo_gem->relocs[bo_gem->reloc_count].presumed_offset = target_bo->offset; + + bo_gem->reloc_target_bo[bo_gem->reloc_count] = target_bo; + drm_intel_gem_bo_reference(target_bo); + + bo_gem->reloc_count++; + + pthread_mutex_unlock(&bufmgr_gem->lock); + + return 0; +} + +/** + * Walk the tree of relocations rooted at BO and accumulate the list of + * validations to be performed and update the relocation buffers with + * index values into the validation list. + */ +static void +drm_intel_gem_bo_process_reloc(drm_intel_bo *bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + int i; + + if (bo_gem->relocs == NULL) + return; + + for (i = 0; i < bo_gem->reloc_count; i++) { + drm_intel_bo *target_bo = bo_gem->reloc_target_bo[i]; + + /* Continue walking the tree depth-first. */ + drm_intel_gem_bo_process_reloc(target_bo); + + /* Add the target to the validate list */ + drm_intel_add_validate_buffer(target_bo); + } +} + +static void +drm_intel_update_buffer_offsets(drm_intel_bufmgr_gem *bufmgr_gem) +{ + int i; + + for (i = 0; i < bufmgr_gem->exec_count; i++) { + drm_intel_bo *bo = bufmgr_gem->exec_bos[i]; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + + /* Update the buffer offset */ + if (bufmgr_gem->exec_objects[i].offset != bo->offset) { + DBG("BO %d (%s) migrated: 0x%08lx -> 0x%08llx\n", + bo_gem->gem_handle, bo_gem->name, bo->offset, + (unsigned long long)bufmgr_gem->exec_objects[i]. + offset); + bo->offset = bufmgr_gem->exec_objects[i].offset; + } + } +} + +static int +drm_intel_gem_bo_exec(drm_intel_bo *bo, int used, + drm_clip_rect_t * cliprects, int num_cliprects, int DR4) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + struct drm_i915_gem_execbuffer execbuf; + int ret, i; + + pthread_mutex_lock(&bufmgr_gem->lock); + /* Update indices and set up the validate list. */ + drm_intel_gem_bo_process_reloc(bo); + + /* Add the batch buffer to the validation list. There are no + * relocations pointing to it. + */ + drm_intel_add_validate_buffer(bo); + + execbuf.buffers_ptr = (uintptr_t) bufmgr_gem->exec_objects; + execbuf.buffer_count = bufmgr_gem->exec_count; + execbuf.batch_start_offset = 0; + execbuf.batch_len = used; + execbuf.cliprects_ptr = (uintptr_t) cliprects; + execbuf.num_cliprects = num_cliprects; + execbuf.DR1 = 0; + execbuf.DR4 = DR4; + + do { + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_EXECBUFFER, + &execbuf); + } while (ret != 0 && errno == EAGAIN); + + if (ret != 0 && errno == ENOMEM) { + fprintf(stderr, + "Execbuffer fails to pin. " + "Estimate: %u. Actual: %u. Available: %u\n", + drm_intel_gem_estimate_batch_space(bufmgr_gem->exec_bos, + bufmgr_gem-> + exec_count), + drm_intel_gem_compute_batch_space(bufmgr_gem->exec_bos, + bufmgr_gem-> + exec_count), + (unsigned int)bufmgr_gem->gtt_size); + } + drm_intel_update_buffer_offsets(bufmgr_gem); + + if (bufmgr_gem->bufmgr.debug) + drm_intel_gem_dump_validation_list(bufmgr_gem); + + for (i = 0; i < bufmgr_gem->exec_count; i++) { + drm_intel_bo *bo = bufmgr_gem->exec_bos[i]; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + + /* Disconnect the buffer from the validate list */ + bo_gem->validate_index = -1; + drm_intel_gem_bo_unreference_locked(bo); + bufmgr_gem->exec_bos[i] = NULL; + } + bufmgr_gem->exec_count = 0; + pthread_mutex_unlock(&bufmgr_gem->lock); + + return 0; +} + +static int +drm_intel_gem_bo_pin(drm_intel_bo *bo, uint32_t alignment) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_pin pin; + int ret; + + memset(&pin, 0, sizeof(pin)); + pin.handle = bo_gem->gem_handle; + pin.alignment = alignment; + + do { + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_PIN, &pin); + } while (ret == -1 && errno == EINTR); + + if (ret != 0) + return -errno; + + bo->offset = pin.offset; + return 0; +} + +static int +drm_intel_gem_bo_unpin(drm_intel_bo *bo) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_unpin unpin; + int ret; + + memset(&unpin, 0, sizeof(unpin)); + unpin.handle = bo_gem->gem_handle; + + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_UNPIN, &unpin); + if (ret != 0) + return -errno; + + return 0; +} + +static int +drm_intel_gem_bo_set_tiling(drm_intel_bo *bo, uint32_t * tiling_mode, + uint32_t stride) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_i915_gem_set_tiling set_tiling; + int ret; + + if (bo_gem->global_name == 0 && *tiling_mode == bo_gem->tiling_mode) + return 0; + + /* If we're going from non-tiling to tiling, bump fence count */ + if (bo_gem->tiling_mode == I915_TILING_NONE) + bo_gem->reloc_tree_fences++; + + memset(&set_tiling, 0, sizeof(set_tiling)); + set_tiling.handle = bo_gem->gem_handle; + set_tiling.tiling_mode = *tiling_mode; + set_tiling.stride = stride; + + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling); + if (ret != 0) { + *tiling_mode = bo_gem->tiling_mode; + return -errno; + } + bo_gem->tiling_mode = set_tiling.tiling_mode; + bo_gem->swizzle_mode = set_tiling.swizzle_mode; + + /* If we're going from tiling to non-tiling, drop fence count */ + if (bo_gem->tiling_mode == I915_TILING_NONE) + bo_gem->reloc_tree_fences--; + + *tiling_mode = bo_gem->tiling_mode; + return 0; +} + +static int +drm_intel_gem_bo_get_tiling(drm_intel_bo *bo, uint32_t * tiling_mode, + uint32_t * swizzle_mode) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + + *tiling_mode = bo_gem->tiling_mode; + *swizzle_mode = bo_gem->swizzle_mode; + return 0; +} + +static int +drm_intel_gem_bo_flink(drm_intel_bo *bo, uint32_t * name) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + struct drm_gem_flink flink; + int ret; + + if (!bo_gem->global_name) { + memset(&flink, 0, sizeof(flink)); + flink.handle = bo_gem->gem_handle; + + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_FLINK, &flink); + if (ret != 0) + return -errno; + bo_gem->global_name = flink.name; + bo_gem->reusable = 0; + } + + *name = bo_gem->global_name; + return 0; +} + +/** + * Enables unlimited caching of buffer objects for reuse. + * + * This is potentially very memory expensive, as the cache at each bucket + * size is only bounded by how many buffers of that size we've managed to have + * in flight at once. + */ +void +drm_intel_bufmgr_gem_enable_reuse(drm_intel_bufmgr *bufmgr) +{ + drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr; + + bufmgr_gem->bo_reuse = 1; +} + +/** + * Return the additional aperture space required by the tree of buffer objects + * rooted at bo. + */ +static int +drm_intel_gem_bo_get_aperture_space(drm_intel_bo *bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + int i; + int total = 0; + + if (bo == NULL || bo_gem->included_in_check_aperture) + return 0; + + total += bo->size; + bo_gem->included_in_check_aperture = 1; + + for (i = 0; i < bo_gem->reloc_count; i++) + total += + drm_intel_gem_bo_get_aperture_space(bo_gem-> + reloc_target_bo[i]); + + return total; +} + +/** + * Count the number of buffers in this list that need a fence reg + * + * If the count is greater than the number of available regs, we'll have + * to ask the caller to resubmit a batch with fewer tiled buffers. + * + * This function over-counts if the same buffer is used multiple times. + */ +static unsigned int +drm_intel_gem_total_fences(drm_intel_bo ** bo_array, int count) +{ + int i; + unsigned int total = 0; + + for (i = 0; i < count; i++) { + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo_array[i]; + + if (bo_gem == NULL) + continue; + + total += bo_gem->reloc_tree_fences; + } + return total; +} + +/** + * Clear the flag set by drm_intel_gem_bo_get_aperture_space() so we're ready + * for the next drm_intel_bufmgr_check_aperture_space() call. + */ +static void +drm_intel_gem_bo_clear_aperture_space_flag(drm_intel_bo *bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + int i; + + if (bo == NULL || !bo_gem->included_in_check_aperture) + return; + + bo_gem->included_in_check_aperture = 0; + + for (i = 0; i < bo_gem->reloc_count; i++) + drm_intel_gem_bo_clear_aperture_space_flag(bo_gem-> + reloc_target_bo[i]); +} + +/** + * Return a conservative estimate for the amount of aperture required + * for a collection of buffers. This may double-count some buffers. + */ +static unsigned int +drm_intel_gem_estimate_batch_space(drm_intel_bo **bo_array, int count) +{ + int i; + unsigned int total = 0; + + for (i = 0; i < count; i++) { + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo_array[i]; + if (bo_gem != NULL) + total += bo_gem->reloc_tree_size; + } + return total; +} + +/** + * Return the amount of aperture needed for a collection of buffers. + * This avoids double counting any buffers, at the cost of looking + * at every buffer in the set. + */ +static unsigned int +drm_intel_gem_compute_batch_space(drm_intel_bo **bo_array, int count) +{ + int i; + unsigned int total = 0; + + for (i = 0; i < count; i++) { + total += drm_intel_gem_bo_get_aperture_space(bo_array[i]); + /* For the first buffer object in the array, we get an + * accurate count back for its reloc_tree size (since nothing + * had been flagged as being counted yet). We can save that + * value out as a more conservative reloc_tree_size that + * avoids double-counting target buffers. Since the first + * buffer happens to usually be the batch buffer in our + * callers, this can pull us back from doing the tree + * walk on every new batch emit. + */ + if (i == 0) { + drm_intel_bo_gem *bo_gem = + (drm_intel_bo_gem *) bo_array[i]; + bo_gem->reloc_tree_size = total; + } + } + + for (i = 0; i < count; i++) + drm_intel_gem_bo_clear_aperture_space_flag(bo_array[i]); + return total; +} + +/** + * Return -1 if the batchbuffer should be flushed before attempting to + * emit rendering referencing the buffers pointed to by bo_array. + * + * This is required because if we try to emit a batchbuffer with relocations + * to a tree of buffers that won't simultaneously fit in the aperture, + * the rendering will return an error at a point where the software is not + * prepared to recover from it. + * + * However, we also want to emit the batchbuffer significantly before we reach + * the limit, as a series of batchbuffers each of which references buffers + * covering almost all of the aperture means that at each emit we end up + * waiting to evict a buffer from the last rendering, and we get synchronous + * performance. By emitting smaller batchbuffers, we eat some CPU overhead to + * get better parallelism. + */ +static int +drm_intel_gem_check_aperture_space(drm_intel_bo **bo_array, int count) +{ + drm_intel_bufmgr_gem *bufmgr_gem = + (drm_intel_bufmgr_gem *) bo_array[0]->bufmgr; + unsigned int total = 0; + unsigned int threshold = bufmgr_gem->gtt_size * 3 / 4; + int total_fences; + + /* Check for fence reg constraints if necessary */ + if (bufmgr_gem->available_fences) { + total_fences = drm_intel_gem_total_fences(bo_array, count); + if (total_fences > bufmgr_gem->available_fences) + return -1; + } + + total = drm_intel_gem_estimate_batch_space(bo_array, count); + + if (total > threshold) + total = drm_intel_gem_compute_batch_space(bo_array, count); + + if (total > threshold) { + DBG("check_space: overflowed available aperture, " + "%dkb vs %dkb\n", + total / 1024, (int)bufmgr_gem->gtt_size / 1024); + return -1; + } else { + DBG("drm_check_space: total %dkb vs bufgr %dkb\n", total / 1024, + (int)bufmgr_gem->gtt_size / 1024); + return 0; + } +} + +/* + * Disable buffer reuse for objects which are shared with the kernel + * as scanout buffers + */ +static int +drm_intel_gem_bo_disable_reuse(drm_intel_bo *bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + + bo_gem->reusable = 0; + return 0; +} + +static int +_drm_intel_gem_bo_references(drm_intel_bo *bo, drm_intel_bo *target_bo) +{ + drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; + int i; + + for (i = 0; i < bo_gem->reloc_count; i++) { + if (bo_gem->reloc_target_bo[i] == target_bo) + return 1; + if (_drm_intel_gem_bo_references(bo_gem->reloc_target_bo[i], + target_bo)) + return 1; + } + + return 0; +} + +/** Return true if target_bo is referenced by bo's relocation tree. */ +static int +drm_intel_gem_bo_references(drm_intel_bo *bo, drm_intel_bo *target_bo) +{ + drm_intel_bo_gem *target_bo_gem = (drm_intel_bo_gem *) target_bo; + + if (bo == NULL || target_bo == NULL) + return 0; + if (target_bo_gem->used_as_reloc_target) + return _drm_intel_gem_bo_references(bo, target_bo); + return 0; +} + +/** + * Initializes the GEM buffer manager, which uses the kernel to allocate, map, + * and manage map buffer objections. + * + * \param fd File descriptor of the opened DRM device. + */ +drm_intel_bufmgr * +drm_intel_bufmgr_gem_init(int fd, int batch_size) +{ + drm_intel_bufmgr_gem *bufmgr_gem; + struct drm_i915_gem_get_aperture aperture; + drm_i915_getparam_t gp; + int ret, i; + unsigned long size; + + bufmgr_gem = calloc(1, sizeof(*bufmgr_gem)); + bufmgr_gem->fd = fd; + + if (pthread_mutex_init(&bufmgr_gem->lock, NULL) != 0) { + free(bufmgr_gem); + return NULL; + } + + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_GET_APERTURE, &aperture); + + if (ret == 0) + bufmgr_gem->gtt_size = aperture.aper_available_size; + else { + fprintf(stderr, "DRM_IOCTL_I915_GEM_APERTURE failed: %s\n", + strerror(errno)); + bufmgr_gem->gtt_size = 128 * 1024 * 1024; + fprintf(stderr, "Assuming %dkB available aperture size.\n" + "May lead to reduced performance or incorrect " + "rendering.\n", + (int)bufmgr_gem->gtt_size / 1024); + } + + gp.param = I915_PARAM_CHIPSET_ID; + gp.value = &bufmgr_gem->pci_device; + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); + if (ret) { + fprintf(stderr, "get chip id failed: %d [%d]\n", ret, errno); + fprintf(stderr, "param: %d, val: %d\n", gp.param, *gp.value); + } + + if (!IS_I965G(bufmgr_gem)) { + gp.param = I915_PARAM_NUM_FENCES_AVAIL; + gp.value = &bufmgr_gem->available_fences; + ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); + if (ret) { + fprintf(stderr, "get fences failed: %d [%d]\n", ret, + errno); + fprintf(stderr, "param: %d, val: %d\n", gp.param, + *gp.value); + bufmgr_gem->available_fences = 0; + } + } + + /* Let's go with one relocation per every 2 dwords (but round down a bit + * since a power of two will mean an extra page allocation for the reloc + * buffer). + * + * Every 4 was too few for the blender benchmark. + */ + bufmgr_gem->max_relocs = batch_size / sizeof(uint32_t) / 2 - 2; + + bufmgr_gem->bufmgr.bo_alloc = drm_intel_gem_bo_alloc; + bufmgr_gem->bufmgr.bo_alloc_for_render = + drm_intel_gem_bo_alloc_for_render; + bufmgr_gem->bufmgr.bo_alloc_tiled = drm_intel_gem_bo_alloc_tiled; + bufmgr_gem->bufmgr.bo_reference = drm_intel_gem_bo_reference; + bufmgr_gem->bufmgr.bo_unreference = drm_intel_gem_bo_unreference; + bufmgr_gem->bufmgr.bo_map = drm_intel_gem_bo_map; + bufmgr_gem->bufmgr.bo_unmap = drm_intel_gem_bo_unmap; + bufmgr_gem->bufmgr.bo_subdata = drm_intel_gem_bo_subdata; + bufmgr_gem->bufmgr.bo_get_subdata = drm_intel_gem_bo_get_subdata; + bufmgr_gem->bufmgr.bo_wait_rendering = drm_intel_gem_bo_wait_rendering; + bufmgr_gem->bufmgr.bo_emit_reloc = drm_intel_gem_bo_emit_reloc; + bufmgr_gem->bufmgr.bo_pin = drm_intel_gem_bo_pin; + bufmgr_gem->bufmgr.bo_unpin = drm_intel_gem_bo_unpin; + bufmgr_gem->bufmgr.bo_get_tiling = drm_intel_gem_bo_get_tiling; + bufmgr_gem->bufmgr.bo_set_tiling = drm_intel_gem_bo_set_tiling; + bufmgr_gem->bufmgr.bo_flink = drm_intel_gem_bo_flink; + bufmgr_gem->bufmgr.bo_exec = drm_intel_gem_bo_exec; + bufmgr_gem->bufmgr.bo_busy = drm_intel_gem_bo_busy; + bufmgr_gem->bufmgr.destroy = drm_intel_bufmgr_gem_destroy; + bufmgr_gem->bufmgr.debug = 0; + bufmgr_gem->bufmgr.check_aperture_space = + drm_intel_gem_check_aperture_space; + bufmgr_gem->bufmgr.bo_disable_reuse = drm_intel_gem_bo_disable_reuse; + bufmgr_gem->bufmgr.get_pipe_from_crtc_id = + drm_intel_gem_get_pipe_from_crtc_id; + bufmgr_gem->bufmgr.bo_references = drm_intel_gem_bo_references; + + /* Initialize the linked lists for BO reuse cache. */ + for (i = 0, size = 4096; i < DRM_INTEL_GEM_BO_BUCKETS; i++, size *= 2) { + DRMINITLISTHEAD(&bufmgr_gem->cache_bucket[i].head); + bufmgr_gem->cache_bucket[i].size = size; + } + + return &bufmgr_gem->bufmgr; +} |