/************************************************************************** * * Copyright © 2007 Red Hat Inc. * Copyright © 2007-2012 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 * Keith Whitwell * Eric Anholt * Dave Airlie */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "errno.h" #ifndef ETIME #define ETIME ETIMEDOUT #endif #include "libdrm_macros.h" #include "libdrm_lists.h" #include "intel_bufmgr.h" #include "intel_bufmgr_priv.h" #include "intel_chipset.h" #include "string.h" #include "i915_drm.h" #include "uthash.h" #if HAVE_VALGRIND #include #include #define VG(x) x #else #define VG(x) #endif #define memclear(s) memset(&s, 0, sizeof(s)) #define DBG(...) do { \ if (bufmgr_gem->bufmgr.debug) \ fprintf(stderr, __VA_ARGS__); \ } while (0) #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) #define MAX2(A, B) ((A) > (B) ? (A) : (B)) /** * upper_32_bits - return bits 32-63 of a number * @n: the number we're accessing * * A basic shift-right of a 64- or 32-bit quantity. Use this to suppress * the "right shift count >= width of type" warning when that quantity is * 32-bits. */ #define upper_32_bits(n) ((__u32)(((n) >> 16) >> 16)) /** * lower_32_bits - return bits 0-31 of a number * @n: the number we're accessing */ #define lower_32_bits(n) ((__u32)(n)) typedef struct _drm_intel_bo_gem drm_intel_bo_gem; struct drm_intel_gem_bo_bucket { drmMMListHead head; unsigned long size; }; typedef struct _drm_intel_bufmgr_gem { drm_intel_bufmgr bufmgr; atomic_t refcount; int fd; int max_relocs; pthread_mutex_t lock; struct drm_i915_gem_exec_object *exec_objects; struct drm_i915_gem_exec_object2 *exec2_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[14 * 4]; int num_buckets; time_t time; drmMMListHead managers; drm_intel_bo_gem *name_table; drm_intel_bo_gem *handle_table; drmMMListHead vma_cache; int vma_count, vma_open, vma_max; uint64_t gtt_size; int available_fences; int pci_device; int gen; unsigned int has_bsd : 1; unsigned int has_blt : 1; unsigned int has_relaxed_fencing : 1; unsigned int has_llc : 1; unsigned int has_wait_timeout : 1; unsigned int bo_reuse : 1; unsigned int no_exec : 1; unsigned int has_vebox : 1; unsigned int has_exec_async : 1; bool fenced_relocs; struct { void *ptr; uint32_t handle; } userptr_active; } drm_intel_bufmgr_gem; #define DRM_INTEL_RELOC_FENCE (1<<0) typedef struct _drm_intel_reloc_target_info { drm_intel_bo *bo; int flags; } drm_intel_reloc_target; 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 * * List contains both flink named and prime fd'd objects */ unsigned int global_name; UT_hash_handle handle_hh; UT_hash_handle name_hh; /** * 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; unsigned long stride; unsigned long kflags; time_t free_time; /** Array passed to the DRM containing relocation information. */ struct drm_i915_gem_relocation_entry *relocs; /** * Array of info structs corresponding to relocs[i].target_handle etc */ drm_intel_reloc_target *reloc_target_info; /** Number of entries in relocs */ int reloc_count; /** Array of BOs that are referenced by this buffer and will be softpinned */ drm_intel_bo **softpin_target; /** Number softpinned BOs that are referenced by this buffer */ int softpin_target_count; /** Maximum amount of softpinned BOs that are referenced by this buffer */ int softpin_target_size; /** 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; /** WC CPU address for the buffer, saved across map/unmap cycles */ void *wc_virtual; /** * Virtual address of the buffer allocated by user, used for userptr * objects only. */ void *user_virtual; int map_count; drmMMListHead vma_list; /** 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. */ bool 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. */ bool used_as_reloc_target; /** * Boolean of whether we have encountered an error whilst building the relocation tree. */ bool has_error; /** * Boolean of whether this buffer can be re-used */ bool reusable; /** * Boolean of whether the GPU is definitely not accessing the buffer. * * This is only valid when reusable, since non-reusable * buffers are those that have been shared with other * processes, so we don't know their state. */ bool idle; /** * Boolean of whether this buffer was allocated with userptr */ bool is_userptr; /** * 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; /** Flags that we may need to do the SW_FINISH ioctl on unmap. */ bool mapped_cpu_write; }; 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_internal(drm_intel_bo *bo, uint32_t tiling_mode, uint32_t stride); 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 inline drm_intel_bo_gem *to_bo_gem(drm_intel_bo *bo) { return (drm_intel_bo_gem *)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 (bufmgr_gem->gen >= 4) return ROUND_UP_TO(size, 4096); /* Older chips need powers of two, of at least 512k or 1M */ if (bufmgr_gem->gen == 3) { 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; } /* Do we need to allocate every page for the fence? */ if (bufmgr_gem->has_relaxed_fencing) return ROUND_UP_TO(size, 4096); 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; unsigned long i; /* If untiled, then just align it so that we can do rendering * to it with the 3D engine. */ if (*tiling_mode == I915_TILING_NONE) return ALIGN(pitch, 64); if (*tiling_mode == I915_TILING_X || (IS_915(bufmgr_gem->pci_device) && *tiling_mode == I915_TILING_Y)) tile_width = 512; else tile_width = 128; /* 965 is flexible */ if (bufmgr_gem->gen >= 4) return ROUND_UP_TO(pitch, tile_width); /* The older hardware has a maximum pitch of 8192 with tiled * surfaces, so fallback to untiled if it's too large. */ if (pitch > 8192) { *tiling_mode = I915_TILING_NONE; return ALIGN(pitch, 64); } /* 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 < bufmgr_gem->num_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 && bo_gem->softpin_target == NULL) { DBG("%2d: %d %s(%s)\n", i, bo_gem->gem_handle, bo_gem->kflags & EXEC_OBJECT_PINNED ? "*" : "", bo_gem->name); continue; } for (j = 0; j < bo_gem->reloc_count; j++) { drm_intel_bo *target_bo = bo_gem->reloc_target_info[j].bo; drm_intel_bo_gem *target_gem = (drm_intel_bo_gem *) target_bo; DBG("%2d: %d %s(%s)@0x%08x %08x -> " "%d (%s)@0x%08x %08x + 0x%08x\n", i, bo_gem->gem_handle, bo_gem->kflags & EXEC_OBJECT_PINNED ? "*" : "", bo_gem->name, upper_32_bits(bo_gem->relocs[j].offset), lower_32_bits(bo_gem->relocs[j].offset), target_gem->gem_handle, target_gem->name, upper_32_bits(target_bo->offset64), lower_32_bits(target_bo->offset64), bo_gem->relocs[j].delta); } for (j = 0; j < bo_gem->softpin_target_count; j++) { drm_intel_bo *target_bo = bo_gem->softpin_target[j]; drm_intel_bo_gem *target_gem = (drm_intel_bo_gem *) target_bo; DBG("%2d: %d %s(%s) -> " "%d *(%s)@0x%08x %08x\n", i, bo_gem->gem_handle, bo_gem->kflags & EXEC_OBJECT_PINNED ? "*" : "", bo_gem->name, target_gem->gem_handle, target_gem->name, upper_32_bits(target_bo->offset64), lower_32_bits(target_bo->offset64)); } } } static inline void drm_intel_gem_bo_reference(drm_intel_bo *bo) { drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; 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 = bo->align; bufmgr_gem->exec_objects[index].offset = 0; bufmgr_gem->exec_bos[index] = bo; bufmgr_gem->exec_count++; } static void drm_intel_add_validate_buffer2(drm_intel_bo *bo, int need_fence) { 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; unsigned long flags; flags = 0; if (need_fence) flags |= EXEC_OBJECT_NEEDS_FENCE; if (bo_gem->validate_index != -1) { bufmgr_gem->exec2_objects[bo_gem->validate_index].flags |= flags; 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->exec2_objects = realloc(bufmgr_gem->exec2_objects, sizeof(*bufmgr_gem->exec2_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->exec2_objects[index].handle = bo_gem->gem_handle; bufmgr_gem->exec2_objects[index].relocation_count = bo_gem->reloc_count; bufmgr_gem->exec2_objects[index].relocs_ptr = (uintptr_t)bo_gem->relocs; bufmgr_gem->exec2_objects[index].alignment = bo->align; bufmgr_gem->exec2_objects[index].offset = bo->offset64; bufmgr_gem->exec2_objects[index].flags = bo_gem->kflags | flags; bufmgr_gem->exec2_objects[index].rsvd1 = 0; bufmgr_gem->exec2_objects[index].rsvd2 = 0; bufmgr_gem->exec_bos[index] = bo; bufmgr_gem->exec_count++; } #define RELOC_BUF_SIZE(x) ((I915_RELOC_HEADER + x * I915_RELOC0_STRIDE) * \ sizeof(uint32_t)) static void drm_intel_bo_gem_set_in_aperture_size(drm_intel_bufmgr_gem *bufmgr_gem, drm_intel_bo_gem *bo_gem, unsigned int alignment) { unsigned int size; assert(!bo_gem->used_as_reloc_target); /* The older chipsets are far-less flexible in terms of tiling, * and require tiled buffer to be size aligned in the aperture. * This means that in the worst possible case we will need a hole * twice as large as the object in order for it to fit into the * aperture. Optimal packing is for wimps. */ size = bo_gem->bo.size; if (bufmgr_gem->gen < 4 && bo_gem->tiling_mode != I915_TILING_NONE) { unsigned int min_size; if (bufmgr_gem->has_relaxed_fencing) { if (bufmgr_gem->gen == 3) min_size = 1024*1024; else min_size = 512*1024; while (min_size < size) min_size *= 2; } else min_size = size; /* Account for worst-case alignment. */ alignment = MAX2(alignment, min_size); } bo_gem->reloc_tree_size = size + alignment; } 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_info = malloc(max_relocs * sizeof(drm_intel_reloc_target)); if (bo_gem->relocs == NULL || bo_gem->reloc_target_info == NULL) { bo_gem->has_error = true; free (bo_gem->relocs); bo_gem->relocs = NULL; free (bo_gem->reloc_target_info); bo_gem->reloc_target_info = NULL; return 1; } 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; if (bo_gem->reusable && bo_gem->idle) return false; memclear(busy); busy.handle = bo_gem->gem_handle; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_BUSY, &busy); if (ret == 0) { bo_gem->idle = !busy.busy; return busy.busy; } else { return false; } } static int drm_intel_gem_bo_madvise_internal(drm_intel_bufmgr_gem *bufmgr_gem, drm_intel_bo_gem *bo_gem, int state) { struct drm_i915_gem_madvise madv; memclear(madv); madv.handle = bo_gem->gem_handle; madv.madv = state; madv.retained = 1; drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MADVISE, &madv); return madv.retained; } static int drm_intel_gem_bo_madvise(drm_intel_bo *bo, int madv) { return drm_intel_gem_bo_madvise_internal ((drm_intel_bufmgr_gem *) bo->bufmgr, (drm_intel_bo_gem *) bo, madv); } /* 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_internal (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, uint32_t tiling_mode, unsigned long stride, unsigned int alignment) { 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; bool alloc_from_cache; unsigned long bo_size; bool for_render = false; if (flags & BO_ALLOC_FOR_RENDER) for_render = true; /* 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 = false; 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 = true; bo_gem->bo.align = alignment; } else { assert(alignment == 0); /* 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 = true; DRMLISTDEL(&bo_gem->head); } } if (alloc_from_cache) { if (!drm_intel_gem_bo_madvise_internal (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; } if (drm_intel_gem_bo_set_tiling_internal(&bo_gem->bo, tiling_mode, stride)) { drm_intel_gem_bo_free(&bo_gem->bo); goto retry; } } } if (!alloc_from_cache) { struct drm_i915_gem_create create; bo_gem = calloc(1, sizeof(*bo_gem)); if (!bo_gem) goto err; /* drm_intel_gem_bo_free calls DRMLISTDEL() for an uninitialized list (vma_list), so better set the list head here */ DRMINITLISTHEAD(&bo_gem->vma_list); bo_gem->bo.size = bo_size; memclear(create); create.size = bo_size; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_CREATE, &create); if (ret != 0) { free(bo_gem); goto err; } bo_gem->gem_handle = create.handle; HASH_ADD(handle_hh, bufmgr_gem->handle_table, gem_handle, sizeof(bo_gem->gem_handle), bo_gem); bo_gem->bo.handle = bo_gem->gem_handle; bo_gem->bo.bufmgr = bufmgr; bo_gem->bo.align = alignment; bo_gem->tiling_mode = I915_TILING_NONE; bo_gem->swizzle_mode = I915_BIT_6_SWIZZLE_NONE; bo_gem->stride = 0; if (drm_intel_gem_bo_set_tiling_internal(&bo_gem->bo, tiling_mode, stride)) goto err_free; } bo_gem->name = name; atomic_set(&bo_gem->refcount, 1); bo_gem->validate_index = -1; bo_gem->reloc_tree_fences = 0; bo_gem->used_as_reloc_target = false; bo_gem->has_error = false; bo_gem->reusable = true; drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, alignment); pthread_mutex_unlock(&bufmgr_gem->lock); DBG("bo_create: buf %d (%s) %ldb\n", bo_gem->gem_handle, bo_gem->name, size); return &bo_gem->bo; err_free: drm_intel_gem_bo_free(&bo_gem->bo); err: pthread_mutex_unlock(&bufmgr_gem->lock); return NULL; } 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, I915_TILING_NONE, 0, alignment); } 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, I915_TILING_NONE, 0, 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; unsigned long size, stride; uint32_t tiling; do { unsigned long aligned_y, height_alignment; tiling = *tiling_mode; /* If we're tiled, our allocations are in 8 or 32-row blocks, * so failure to align our height means that we won't allocate * enough pages. * * If we're untiled, we still have to align to 2 rows high * because the data port accesses 2x2 blocks even if the * bottom row isn't to be rendered, so failure to align means * we could walk off the end of the GTT and fault. This is * documented on 965, and may be the case on older chipsets * too so we try to be careful. */ aligned_y = y; height_alignment = 2; if ((bufmgr_gem->gen == 2) && tiling != I915_TILING_NONE) height_alignment = 16; else if (tiling == I915_TILING_X || (IS_915(bufmgr_gem->pci_device) && tiling == I915_TILING_Y)) height_alignment = 8; else if (tiling == I915_TILING_Y) height_alignment = 32; aligned_y = ALIGN(y, height_alignment); 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); } while (*tiling_mode != tiling); *pitch = stride; if (tiling == I915_TILING_NONE) stride = 0; return drm_intel_gem_bo_alloc_internal(bufmgr, name, size, flags, tiling, stride, 0); } static drm_intel_bo * drm_intel_gem_bo_alloc_userptr(drm_intel_bufmgr *bufmgr, const char *name, void *addr, uint32_t tiling_mode, uint32_t stride, unsigned long size, unsigned long flags) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr; drm_intel_bo_gem *bo_gem; int ret; struct drm_i915_gem_userptr userptr; /* Tiling with userptr surfaces is not supported * on all hardware so refuse it for time being. */ if (tiling_mode != I915_TILING_NONE) return NULL; bo_gem = calloc(1, sizeof(*bo_gem)); if (!bo_gem) return NULL; atomic_set(&bo_gem->refcount, 1); DRMINITLISTHEAD(&bo_gem->vma_list); bo_gem->bo.size = size; memclear(userptr); userptr.user_ptr = (__u64)((unsigned long)addr); userptr.user_size = size; userptr.flags = flags; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_USERPTR, &userptr); if (ret != 0) { DBG("bo_create_userptr: " "ioctl failed with user ptr %p size 0x%lx, " "user flags 0x%lx\n", addr, size, flags); free(bo_gem); return NULL; } pthread_mutex_lock(&bufmgr_gem->lock); bo_gem->gem_handle = userptr.handle; bo_gem->bo.handle = bo_gem->gem_handle; bo_gem->bo.bufmgr = bufmgr; bo_gem->is_userptr = true; bo_gem->bo.virtual = addr; /* Save the address provided by user */ bo_gem->user_virtual = addr; bo_gem->tiling_mode = I915_TILING_NONE; bo_gem->swizzle_mode = I915_BIT_6_SWIZZLE_NONE; bo_gem->stride = 0; HASH_ADD(handle_hh, bufmgr_gem->handle_table, gem_handle, sizeof(bo_gem->gem_handle), bo_gem); bo_gem->name = name; bo_gem->validate_index = -1; bo_gem->reloc_tree_fences = 0; bo_gem->used_as_reloc_target = false; bo_gem->has_error = false; bo_gem->reusable = false; drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, 0); pthread_mutex_unlock(&bufmgr_gem->lock); DBG("bo_create_userptr: " "ptr %p buf %d (%s) size %ldb, stride 0x%x, tile mode %d\n", addr, bo_gem->gem_handle, bo_gem->name, size, stride, tiling_mode); return &bo_gem->bo; } static bool has_userptr(drm_intel_bufmgr_gem *bufmgr_gem) { int ret; void *ptr; long pgsz; struct drm_i915_gem_userptr userptr; pgsz = sysconf(_SC_PAGESIZE); assert(pgsz > 0); ret = posix_memalign(&ptr, pgsz, pgsz); if (ret) { DBG("Failed to get a page (%ld) for userptr detection!\n", pgsz); return false; } memclear(userptr); userptr.user_ptr = (__u64)(unsigned long)ptr; userptr.user_size = pgsz; retry: ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_USERPTR, &userptr); if (ret) { if (errno == ENODEV && userptr.flags == 0) { userptr.flags = I915_USERPTR_UNSYNCHRONIZED; goto retry; } free(ptr); return false; } /* We don't release the userptr bo here as we want to keep the * kernel mm tracking alive for our lifetime. The first time we * create a userptr object the kernel has to install a mmu_notifer * which is a heavyweight operation (e.g. it requires taking all * mm_locks and stop_machine()). */ bufmgr_gem->userptr_active.ptr = ptr; bufmgr_gem->userptr_active.handle = userptr.handle; return true; } static drm_intel_bo * check_bo_alloc_userptr(drm_intel_bufmgr *bufmgr, const char *name, void *addr, uint32_t tiling_mode, uint32_t stride, unsigned long size, unsigned long flags) { if (has_userptr((drm_intel_bufmgr_gem *)bufmgr)) bufmgr->bo_alloc_userptr = drm_intel_gem_bo_alloc_userptr; else bufmgr->bo_alloc_userptr = NULL; return drm_intel_bo_alloc_userptr(bufmgr, name, addr, tiling_mode, stride, size, flags); } /** * 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; /* At the moment most applications only have a few named bo. * For instance, in a DRI client only the render buffers passed * between X and the client are named. And since X returns the * alternating names for the front/back buffer a linear search * provides a sufficiently fast match. */ pthread_mutex_lock(&bufmgr_gem->lock); HASH_FIND(name_hh, bufmgr_gem->name_table, &handle, sizeof(handle), bo_gem); if (bo_gem) { drm_intel_gem_bo_reference(&bo_gem->bo); goto out; } memclear(open_arg); open_arg.name = handle; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_GEM_OPEN, &open_arg); if (ret != 0) { DBG("Couldn't reference %s handle 0x%08x: %s\n", name, handle, strerror(errno)); bo_gem = NULL; goto out; } /* Now see if someone has used a prime handle to get this * object from the kernel before by looking through the list * again for a matching gem_handle */ HASH_FIND(handle_hh, bufmgr_gem->handle_table, &open_arg.handle, sizeof(open_arg.handle), bo_gem); if (bo_gem) { drm_intel_gem_bo_reference(&bo_gem->bo); goto out; } bo_gem = calloc(1, sizeof(*bo_gem)); if (!bo_gem) goto out; atomic_set(&bo_gem->refcount, 1); DRMINITLISTHEAD(&bo_gem->vma_list); bo_gem->bo.size = open_arg.size; bo_gem->bo.offset = 0; bo_gem->bo.offset64 = 0; bo_gem->bo.virtual = NULL; bo_gem->bo.bufmgr = bufmgr; bo_gem->name = name; bo_gem->validate_index = -1; bo_gem->gem_handle = open_arg.handle; bo_gem->bo.handle = open_arg.handle; bo_gem->global_name = handle; bo_gem->reusable = false; HASH_ADD(handle_hh, bufmgr_gem->handle_table, gem_handle, sizeof(bo_gem->gem_handle), bo_gem); HASH_ADD(name_hh, bufmgr_gem->name_table, global_name, sizeof(bo_gem->global_name), bo_gem); memclear(get_tiling); get_tiling.handle = bo_gem->gem_handle; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling); if (ret != 0) goto err_unref; bo_gem->tiling_mode = get_tiling.tiling_mode; bo_gem->swizzle_mode = get_tiling.swizzle_mode; /* XXX stride is unknown */ drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, 0); DBG("bo_create_from_handle: %d (%s)\n", handle, bo_gem->name); out: pthread_mutex_unlock(&bufmgr_gem->lock); return &bo_gem->bo; err_unref: drm_intel_gem_bo_free(&bo_gem->bo); pthread_mutex_unlock(&bufmgr_gem->lock); return NULL; } 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; DRMLISTDEL(&bo_gem->vma_list); if (bo_gem->mem_virtual) { VG(VALGRIND_FREELIKE_BLOCK(bo_gem->mem_virtual, 0)); drm_munmap(bo_gem->mem_virtual, bo_gem->bo.size); bufmgr_gem->vma_count--; } if (bo_gem->wc_virtual) { VG(VALGRIND_FREELIKE_BLOCK(bo_gem->wc_virtual, 0)); drm_munmap(bo_gem->wc_virtual, bo_gem->bo.size); bufmgr_gem->vma_count--; } if (bo_gem->gtt_virtual) { drm_munmap(bo_gem->gtt_virtual, bo_gem->bo.size); bufmgr_gem->vma_count--; } if (bo_gem->global_name) HASH_DELETE(name_hh, bufmgr_gem->name_table, bo_gem); HASH_DELETE(handle_hh, bufmgr_gem->handle_table, bo_gem); /* Close this object */ memclear(close); close.handle = bo_gem->gem_handle; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_GEM_CLOSE, &close); if (ret != 0) { DBG("DRM_IOCTL_GEM_CLOSE %d failed (%s): %s\n", bo_gem->gem_handle, bo_gem->name, strerror(errno)); } free(bo); } static void drm_intel_gem_bo_mark_mmaps_incoherent(drm_intel_bo *bo) { #if HAVE_VALGRIND drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; if (bo_gem->mem_virtual) VALGRIND_MAKE_MEM_NOACCESS(bo_gem->mem_virtual, bo->size); if (bo_gem->wc_virtual) VALGRIND_MAKE_MEM_NOACCESS(bo_gem->wc_virtual, bo->size); if (bo_gem->gtt_virtual) VALGRIND_MAKE_MEM_NOACCESS(bo_gem->gtt_virtual, bo->size); #endif } /** 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; if (bufmgr_gem->time == time) return; for (i = 0; i < bufmgr_gem->num_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); } } bufmgr_gem->time = time; } static void drm_intel_gem_bo_purge_vma_cache(drm_intel_bufmgr_gem *bufmgr_gem) { int limit; DBG("%s: cached=%d, open=%d, limit=%d\n", __FUNCTION__, bufmgr_gem->vma_count, bufmgr_gem->vma_open, bufmgr_gem->vma_max); if (bufmgr_gem->vma_max < 0) return; /* We may need to evict a few entries in order to create new mmaps */ limit = bufmgr_gem->vma_max - 2*bufmgr_gem->vma_open; if (limit < 0) limit = 0; while (bufmgr_gem->vma_count > limit) { drm_intel_bo_gem *bo_gem; bo_gem = DRMLISTENTRY(drm_intel_bo_gem, bufmgr_gem->vma_cache.next, vma_list); assert(bo_gem->map_count == 0); DRMLISTDELINIT(&bo_gem->vma_list); if (bo_gem->mem_virtual) { drm_munmap(bo_gem->mem_virtual, bo_gem->bo.size); bo_gem->mem_virtual = NULL; bufmgr_gem->vma_count--; } if (bo_gem->wc_virtual) { drm_munmap(bo_gem->wc_virtual, bo_gem->bo.size); bo_gem->wc_virtual = NULL; bufmgr_gem->vma_count--; } if (bo_gem->gtt_virtual) { drm_munmap(bo_gem->gtt_virtual, bo_gem->bo.size); bo_gem->gtt_virtual = NULL; bufmgr_gem->vma_count--; } } } static void drm_intel_gem_bo_close_vma(drm_intel_bufmgr_gem *bufmgr_gem, drm_intel_bo_gem *bo_gem) { bufmgr_gem->vma_open--; DRMLISTADDTAIL(&bo_gem->vma_list, &bufmgr_gem->vma_cache); if (bo_gem->mem_virtual) bufmgr_gem->vma_count++; if (bo_gem->wc_virtual) bufmgr_gem->vma_count++; if (bo_gem->gtt_virtual) bufmgr_gem->vma_count++; drm_intel_gem_bo_purge_vma_cache(bufmgr_gem); } static void drm_intel_gem_bo_open_vma(drm_intel_bufmgr_gem *bufmgr_gem, drm_intel_bo_gem *bo_gem) { bufmgr_gem->vma_open++; DRMLISTDEL(&bo_gem->vma_list); if (bo_gem->mem_virtual) bufmgr_gem->vma_count--; if (bo_gem->wc_virtual) bufmgr_gem->vma_count--; if (bo_gem->gtt_virtual) bufmgr_gem->vma_count--; drm_intel_gem_bo_purge_vma_cache(bufmgr_gem); } 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; int i; /* Unreference all the target buffers */ for (i = 0; i < bo_gem->reloc_count; i++) { if (bo_gem->reloc_target_info[i].bo != bo) { drm_intel_gem_bo_unreference_locked_timed(bo_gem-> reloc_target_info[i].bo, time); } } for (i = 0; i < bo_gem->softpin_target_count; i++) drm_intel_gem_bo_unreference_locked_timed(bo_gem->softpin_target[i], time); bo_gem->kflags = 0; bo_gem->reloc_count = 0; bo_gem->used_as_reloc_target = false; bo_gem->softpin_target_count = 0; DBG("bo_unreference final: %d (%s)\n", bo_gem->gem_handle, bo_gem->name); /* release memory associated with this object */ if (bo_gem->reloc_target_info) { free(bo_gem->reloc_target_info); bo_gem->reloc_target_info = NULL; } if (bo_gem->relocs) { free(bo_gem->relocs); bo_gem->relocs = NULL; } if (bo_gem->softpin_target) { free(bo_gem->softpin_target); bo_gem->softpin_target = NULL; bo_gem->softpin_target_size = 0; } /* Clear any left-over mappings */ if (bo_gem->map_count) { DBG("bo freed with non-zero map-count %d\n", bo_gem->map_count); bo_gem->map_count = 0; drm_intel_gem_bo_close_vma(bufmgr_gem, bo_gem); drm_intel_gem_bo_mark_mmaps_incoherent(bo); } bucket = drm_intel_gem_bo_bucket_for_size(bufmgr_gem, bo->size); /* Put the buffer into our internal cache for reuse if we can. */ if (bufmgr_gem->bo_reuse && bo_gem->reusable && bucket != NULL && drm_intel_gem_bo_madvise_internal(bufmgr_gem, bo_gem, I915_MADV_DONTNEED)) { bo_gem->free_time = time; bo_gem->name = NULL; bo_gem->validate_index = -1; DRMLISTADDTAIL(&bo_gem->head, &bucket->head); } else { drm_intel_gem_bo_free(bo); } } 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_add_unless(&bo_gem->refcount, -1, 1)) { 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); if (atomic_dec_and_test(&bo_gem->refcount)) { drm_intel_gem_bo_unreference_final(bo, time.tv_sec); drm_intel_gem_cleanup_bo_cache(bufmgr_gem, 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; if (bo_gem->is_userptr) { /* Return the same user ptr */ bo->virtual = bo_gem->user_virtual; return 0; } pthread_mutex_lock(&bufmgr_gem->lock); if (bo_gem->map_count++ == 0) drm_intel_gem_bo_open_vma(bufmgr_gem, bo_gem); if (!bo_gem->mem_virtual) { struct drm_i915_gem_mmap mmap_arg; DBG("bo_map: %d (%s), map_count=%d\n", bo_gem->gem_handle, bo_gem->name, bo_gem->map_count); memclear(mmap_arg); mmap_arg.handle = bo_gem->gem_handle; mmap_arg.size = bo->size; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg); if (ret != 0) { ret = -errno; DBG("%s:%d: Error mapping buffer %d (%s): %s .\n", __FILE__, __LINE__, bo_gem->gem_handle, bo_gem->name, strerror(errno)); if (--bo_gem->map_count == 0) drm_intel_gem_bo_close_vma(bufmgr_gem, bo_gem); pthread_mutex_unlock(&bufmgr_gem->lock); return ret; } VG(VALGRIND_MALLOCLIKE_BLOCK(mmap_arg.addr_ptr, mmap_arg.size, 0, 1)); 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; memclear(set_domain); 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; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain); if (ret != 0) { DBG("%s:%d: Error setting to CPU domain %d: %s\n", __FILE__, __LINE__, bo_gem->gem_handle, strerror(errno)); } if (write_enable) bo_gem->mapped_cpu_write = true; drm_intel_gem_bo_mark_mmaps_incoherent(bo); VG(VALGRIND_MAKE_MEM_DEFINED(bo_gem->mem_virtual, bo->size)); pthread_mutex_unlock(&bufmgr_gem->lock); return 0; } static int 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; int ret; if (bo_gem->is_userptr) return -EINVAL; if (bo_gem->map_count++ == 0) drm_intel_gem_bo_open_vma(bufmgr_gem, bo_gem); /* 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), map_count=%d\n", bo_gem->gem_handle, bo_gem->name, bo_gem->map_count); memclear(mmap_arg); mmap_arg.handle = bo_gem->gem_handle; /* Get the fake offset back... */ ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg); if (ret != 0) { ret = -errno; DBG("%s:%d: Error preparing buffer map %d (%s): %s .\n", __FILE__, __LINE__, bo_gem->gem_handle, bo_gem->name, strerror(errno)); if (--bo_gem->map_count == 0) drm_intel_gem_bo_close_vma(bufmgr_gem, bo_gem); return ret; } /* and mmap it */ bo_gem->gtt_virtual = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED, bufmgr_gem->fd, mmap_arg.offset); if (bo_gem->gtt_virtual == MAP_FAILED) { bo_gem->gtt_virtual = NULL; ret = -errno; DBG("%s:%d: Error mapping buffer %d (%s): %s .\n", __FILE__, __LINE__, bo_gem->gem_handle, bo_gem->name, strerror(errno)); if (--bo_gem->map_count == 0) drm_intel_gem_bo_close_vma(bufmgr_gem, bo_gem); return ret; } } 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); 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); ret = map_gtt(bo); if (ret) { pthread_mutex_unlock(&bufmgr_gem->lock); return ret; } /* Now move it to the GTT domain so that the GPU and CPU * caches are flushed and the GPU isn't actively using the * buffer. * * The pagefault handler does this domain change for us when * it has unbound the BO from the GTT, but it's up to us to * tell it when we're about to use things if we had done * rendering and it still happens to be bound to the GTT. */ memclear(set_domain); set_domain.handle = bo_gem->gem_handle; set_domain.read_domains = I915_GEM_DOMAIN_GTT; set_domain.write_domain = I915_GEM_DOMAIN_GTT; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain); if (ret != 0) { DBG("%s:%d: Error setting domain %d: %s\n", __FILE__, __LINE__, bo_gem->gem_handle, strerror(errno)); } drm_intel_gem_bo_mark_mmaps_incoherent(bo); VG(VALGRIND_MAKE_MEM_DEFINED(bo_gem->gtt_virtual, bo->size)); pthread_mutex_unlock(&bufmgr_gem->lock); return 0; } /** * Performs a mapping of the buffer object like the normal GTT * mapping, but avoids waiting for the GPU to be done reading from or * rendering to the buffer. * * This is used in the implementation of GL_ARB_map_buffer_range: The * user asks to create a buffer, then does a mapping, fills some * space, runs a drawing command, then asks to map it again without * synchronizing because it guarantees that it won't write over the * data that the GPU is busy using (or, more specifically, that if it * does write over the data, it acknowledges that rendering is * undefined). */ int drm_intel_gem_bo_map_unsynchronized(drm_intel_bo *bo) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; #if HAVE_VALGRIND drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; #endif int ret; /* If the CPU cache isn't coherent with the GTT, then use a * regular synchronized mapping. The problem is that we don't * track where the buffer was last used on the CPU side in * terms of drm_intel_bo_map vs drm_intel_gem_bo_map_gtt, so * we would potentially corrupt the buffer even when the user * does reasonable things. */ if (!bufmgr_gem->has_llc) return drm_intel_gem_bo_map_gtt(bo); pthread_mutex_lock(&bufmgr_gem->lock); ret = map_gtt(bo); if (ret == 0) { drm_intel_gem_bo_mark_mmaps_incoherent(bo); VG(VALGRIND_MAKE_MEM_DEFINED(bo_gem->gtt_virtual, bo->size)); } 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_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; int ret = 0; if (bo == NULL) return 0; if (bo_gem->is_userptr) return 0; bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; pthread_mutex_lock(&bufmgr_gem->lock); if (bo_gem->map_count <= 0) { DBG("attempted to unmap an unmapped bo\n"); pthread_mutex_unlock(&bufmgr_gem->lock); /* Preserve the old behaviour of just treating this as a * no-op rather than reporting the error. */ return 0; } if (bo_gem->mapped_cpu_write) { struct drm_i915_gem_sw_finish sw_finish; /* Cause a flush to happen if the buffer's pinned for * scanout, so the results show up in a timely manner. * Unlike GTT set domains, this only does work if the * buffer should be scanout-related. */ memclear(sw_finish); sw_finish.handle = bo_gem->gem_handle; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SW_FINISH, &sw_finish); ret = ret == -1 ? -errno : 0; bo_gem->mapped_cpu_write = false; } /* We need to unmap after every innovation as we cannot track * an open vma for every bo as that will exhaust the system * limits and cause later failures. */ if (--bo_gem->map_count == 0) { drm_intel_gem_bo_close_vma(bufmgr_gem, bo_gem); drm_intel_gem_bo_mark_mmaps_incoherent(bo); bo->virtual = NULL; } pthread_mutex_unlock(&bufmgr_gem->lock); return ret; } int drm_intel_gem_bo_unmap_gtt(drm_intel_bo *bo) { return drm_intel_gem_bo_unmap(bo); } 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; if (bo_gem->is_userptr) return -EINVAL; memclear(pwrite); pwrite.handle = bo_gem->gem_handle; pwrite.offset = offset; pwrite.size = size; pwrite.data_ptr = (uint64_t) (uintptr_t) data; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite); if (ret != 0) { ret = -errno; DBG("%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 ret; } 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; memclear(get_pipe_from_crtc_id); get_pipe_from_crtc_id.crtc_id = crtc_id; ret = drmIoctl(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; if (bo_gem->is_userptr) return -EINVAL; memclear(pread); pread.handle = bo_gem->gem_handle; pread.offset = offset; pread.size = size; pread.data_ptr = (uint64_t) (uintptr_t) data; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_PREAD, &pread); if (ret != 0) { ret = -errno; DBG("%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 ret; } /** Waits for all GPU rendering with 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, 1); } /** * Waits on a BO for the given amount of time. * * @bo: buffer object to wait for * @timeout_ns: amount of time to wait in nanoseconds. * If value is less than 0, an infinite wait will occur. * * Returns 0 if the wait was successful ie. the last batch referencing the * object has completed within the allotted time. Otherwise some negative return * value describes the error. Of particular interest is -ETIME when the wait has * failed to yield the desired result. * * Similar to drm_intel_gem_bo_wait_rendering except a timeout parameter allows * the operation to give up after a certain amount of time. Another subtle * difference is the internal locking semantics are different (this variant does * not hold the lock for the duration of the wait). This makes the wait subject * to a larger userspace race window. * * The implementation shall wait until the object is no longer actively * referenced within a batch buffer at the time of the call. The wait will * not guarantee that the buffer is re-issued via another thread, or an flinked * handle. Userspace must make sure this race does not occur if such precision * is important. * * Note that some kernels have broken the inifite wait for negative values * promise, upgrade to latest stable kernels if this is the case. */ int drm_intel_gem_bo_wait(drm_intel_bo *bo, int64_t timeout_ns) { 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_wait wait; int ret; if (!bufmgr_gem->has_wait_timeout) { DBG("%s:%d: Timed wait is not supported. Falling back to " "infinite wait\n", __FILE__, __LINE__); if (timeout_ns) { drm_intel_gem_bo_wait_rendering(bo); return 0; } else { return drm_intel_gem_bo_busy(bo) ? -ETIME : 0; } } memclear(wait); wait.bo_handle = bo_gem->gem_handle; wait.timeout_ns = timeout_ns; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_WAIT, &wait); if (ret == -1) return -errno; return ret; } /** * 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; memclear(set_domain); 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; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain); if (ret != 0) { DBG("%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; struct drm_gem_close close_bo; int i, ret; free(bufmgr_gem->exec2_objects); 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 < bufmgr_gem->num_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); } } /* Release userptr bo kept hanging around for optimisation. */ if (bufmgr_gem->userptr_active.ptr) { memclear(close_bo); close_bo.handle = bufmgr_gem->userptr_active.handle; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_GEM_CLOSE, &close_bo); free(bufmgr_gem->userptr_active.ptr); if (ret) fprintf(stderr, "Failed to release test userptr object! (%d) " "i915 kernel driver may not be sane!\n", errno); } 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 do_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, bool need_fence) { 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; bool fenced_command; if (bo_gem->has_error) return -ENOMEM; if (target_bo_gem->has_error) { bo_gem->has_error = true; return -ENOMEM; } /* We never use HW fences for rendering on 965+ */ if (bufmgr_gem->gen >= 4) need_fence = false; fenced_command = need_fence; if (target_bo_gem->tiling_mode == I915_TILING_NONE) need_fence = false; /* Create a new relocation list if needed */ if (bo_gem->relocs == NULL && drm_intel_setup_reloc_list(bo)) return -ENOMEM; /* 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); /* An object needing a fence is a tiled buffer, so it won't have * relocs to other buffers. */ if (need_fence) { assert(target_bo_gem->reloc_count == 0); target_bo_gem->reloc_tree_fences = 1; } /* 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); if (target_bo_gem != bo_gem) { target_bo_gem->used_as_reloc_target = true; bo_gem->reloc_tree_size += target_bo_gem->reloc_tree_size; bo_gem->reloc_tree_fences += target_bo_gem->reloc_tree_fences; } bo_gem->reloc_target_info[bo_gem->reloc_count].bo = target_bo; if (target_bo != bo) drm_intel_gem_bo_reference(target_bo); if (fenced_command) bo_gem->reloc_target_info[bo_gem->reloc_count].flags = DRM_INTEL_RELOC_FENCE; else bo_gem->reloc_target_info[bo_gem->reloc_count].flags = 0; 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->offset64; bo_gem->reloc_count++; return 0; } static void drm_intel_gem_bo_use_48b_address_range(drm_intel_bo *bo, uint32_t enable) { drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; if (enable) bo_gem->kflags |= EXEC_OBJECT_SUPPORTS_48B_ADDRESS; else bo_gem->kflags &= ~EXEC_OBJECT_SUPPORTS_48B_ADDRESS; } static int drm_intel_gem_bo_add_softpin_target(drm_intel_bo *bo, drm_intel_bo *target_bo) { 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; if (bo_gem->has_error) return -ENOMEM; if (target_bo_gem->has_error) { bo_gem->has_error = true; return -ENOMEM; } if (!(target_bo_gem->kflags & EXEC_OBJECT_PINNED)) return -EINVAL; if (target_bo_gem == bo_gem) return -EINVAL; if (bo_gem->softpin_target_count == bo_gem->softpin_target_size) { int new_size = bo_gem->softpin_target_size * 2; if (new_size == 0) new_size = bufmgr_gem->max_relocs; bo_gem->softpin_target = realloc(bo_gem->softpin_target, new_size * sizeof(drm_intel_bo *)); if (!bo_gem->softpin_target) return -ENOMEM; bo_gem->softpin_target_size = new_size; } bo_gem->softpin_target[bo_gem->softpin_target_count] = target_bo; drm_intel_gem_bo_reference(target_bo); bo_gem->softpin_target_count++; return 0; } 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 *target_bo_gem = (drm_intel_bo_gem *)target_bo; if (target_bo_gem->kflags & EXEC_OBJECT_PINNED) return drm_intel_gem_bo_add_softpin_target(bo, target_bo); else return do_bo_emit_reloc(bo, offset, target_bo, target_offset, read_domains, write_domain, !bufmgr_gem->fenced_relocs); } static int drm_intel_gem_bo_emit_reloc_fence(drm_intel_bo *bo, uint32_t offset, drm_intel_bo *target_bo, uint32_t target_offset, uint32_t read_domains, uint32_t write_domain) { return do_bo_emit_reloc(bo, offset, target_bo, target_offset, read_domains, write_domain, true); } int drm_intel_gem_bo_get_reloc_count(drm_intel_bo *bo) { drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; return bo_gem->reloc_count; } /** * Removes existing relocation entries in the BO after "start". * * This allows a user to avoid a two-step process for state setup with * counting up all the buffer objects and doing a * drm_intel_bufmgr_check_aperture_space() before emitting any of the * relocations for the state setup. Instead, save the state of the * batchbuffer including drm_intel_gem_get_reloc_count(), emit all the * state, and then check if it still fits in the aperture. * * Any further drm_intel_bufmgr_check_aperture_space() queries * involving this buffer in the tree are undefined after this call. * * This also removes all softpinned targets being referenced by the BO. */ void drm_intel_gem_bo_clear_relocs(drm_intel_bo *bo, int start) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; int i; struct timespec time; clock_gettime(CLOCK_MONOTONIC, &time); assert(bo_gem->reloc_count >= start); /* Unreference the cleared target buffers */ pthread_mutex_lock(&bufmgr_gem->lock); for (i = start; i < bo_gem->reloc_count; i++) { drm_intel_bo_gem *target_bo_gem = (drm_intel_bo_gem *) bo_gem->reloc_target_info[i].bo; if (&target_bo_gem->bo != bo) { bo_gem->reloc_tree_fences -= target_bo_gem->reloc_tree_fences; drm_intel_gem_bo_unreference_locked_timed(&target_bo_gem->bo, time.tv_sec); } } bo_gem->reloc_count = start; for (i = 0; i < bo_gem->softpin_target_count; i++) { drm_intel_bo_gem *target_bo_gem = (drm_intel_bo_gem *) bo_gem->softpin_target[i]; drm_intel_gem_bo_unreference_locked_timed(&target_bo_gem->bo, time.tv_sec); } bo_gem->softpin_target_count = 0; pthread_mutex_unlock(&bufmgr_gem->lock); } /** * 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_info[i].bo; if (target_bo == bo) continue; drm_intel_gem_bo_mark_mmaps_incoherent(bo); /* 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_gem_bo_process_reloc2(drm_intel_bo *bo) { drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *)bo; int i; if (bo_gem->relocs == NULL && bo_gem->softpin_target == NULL) return; for (i = 0; i < bo_gem->reloc_count; i++) { drm_intel_bo *target_bo = bo_gem->reloc_target_info[i].bo; int need_fence; if (target_bo == bo) continue; drm_intel_gem_bo_mark_mmaps_incoherent(bo); /* Continue walking the tree depth-first. */ drm_intel_gem_bo_process_reloc2(target_bo); need_fence = (bo_gem->reloc_target_info[i].flags & DRM_INTEL_RELOC_FENCE); /* Add the target to the validate list */ drm_intel_add_validate_buffer2(target_bo, need_fence); } for (i = 0; i < bo_gem->softpin_target_count; i++) { drm_intel_bo *target_bo = bo_gem->softpin_target[i]; if (target_bo == bo) continue; drm_intel_gem_bo_mark_mmaps_incoherent(bo); drm_intel_gem_bo_process_reloc2(target_bo); drm_intel_add_validate_buffer2(target_bo, false); } } 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->offset64) { DBG("BO %d (%s) migrated: 0x%08x %08x -> 0x%08x %08x\n", bo_gem->gem_handle, bo_gem->name, upper_32_bits(bo->offset64), lower_32_bits(bo->offset64), upper_32_bits(bufmgr_gem->exec_objects[i].offset), lower_32_bits(bufmgr_gem->exec_objects[i].offset)); bo->offset64 = bufmgr_gem->exec_objects[i].offset; bo->offset = bufmgr_gem->exec_objects[i].offset; } } } static void drm_intel_update_buffer_offsets2 (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->exec2_objects[i].offset != bo->offset64) { /* If we're seeing softpinned object here it means that the kernel * has relocated our object... Indicating a programming error */ assert(!(bo_gem->kflags & EXEC_OBJECT_PINNED)); DBG("BO %d (%s) migrated: 0x%08x %08x -> 0x%08x %08x\n", bo_gem->gem_handle, bo_gem->name, upper_32_bits(bo->offset64), lower_32_bits(bo->offset64), upper_32_bits(bufmgr_gem->exec2_objects[i].offset), lower_32_bits(bufmgr_gem->exec2_objects[i].offset)); bo->offset64 = bufmgr_gem->exec2_objects[i].offset; bo->offset = bufmgr_gem->exec2_objects[i].offset; } } } void drm_intel_gem_bo_aub_dump_bmp(drm_intel_bo *bo, int x1, int y1, int width, int height, enum aub_dump_bmp_format format, int pitch, int 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; if (to_bo_gem(bo)->has_error) return -ENOMEM; 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); memclear(execbuf); 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; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_EXECBUFFER, &execbuf); if (ret != 0) { ret = -errno; if (errno == ENOSPC) { DBG("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_gem *bo_gem = to_bo_gem(bufmgr_gem->exec_bos[i]); bo_gem->idle = false; /* Disconnect the buffer from the validate list */ bo_gem->validate_index = -1; bufmgr_gem->exec_bos[i] = NULL; } bufmgr_gem->exec_count = 0; pthread_mutex_unlock(&bufmgr_gem->lock); return ret; } static int do_exec2(drm_intel_bo *bo, int used, drm_intel_context *ctx, drm_clip_rect_t *cliprects, int num_cliprects, int DR4, int in_fence, int *out_fence, unsigned int flags) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bo->bufmgr; struct drm_i915_gem_execbuffer2 execbuf; int ret = 0; int i; if (to_bo_gem(bo)->has_error) return -ENOMEM; switch (flags & 0x7) { default: return -EINVAL; case I915_EXEC_BLT: if (!bufmgr_gem->has_blt) return -EINVAL; break; case I915_EXEC_BSD: if (!bufmgr_gem->has_bsd) return -EINVAL; break; case I915_EXEC_VEBOX: if (!bufmgr_gem->has_vebox) return -EINVAL; break; case I915_EXEC_RENDER: case I915_EXEC_DEFAULT: break; } pthread_mutex_lock(&bufmgr_gem->lock); /* Update indices and set up the validate list. */ drm_intel_gem_bo_process_reloc2(bo); /* Add the batch buffer to the validation list. There are no relocations * pointing to it. */ drm_intel_add_validate_buffer2(bo, 0); memclear(execbuf); execbuf.buffers_ptr = (uintptr_t)bufmgr_gem->exec2_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; execbuf.flags = flags; if (ctx == NULL) i915_execbuffer2_set_context_id(execbuf, 0); else i915_execbuffer2_set_context_id(execbuf, ctx->ctx_id); execbuf.rsvd2 = 0; if (in_fence != -1) { execbuf.rsvd2 = in_fence; execbuf.flags |= I915_EXEC_FENCE_IN; } if (out_fence != NULL) { *out_fence = -1; execbuf.flags |= I915_EXEC_FENCE_OUT; } if (bufmgr_gem->no_exec) goto skip_execution; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_EXECBUFFER2_WR, &execbuf); if (ret != 0) { ret = -errno; if (ret == -ENOSPC) { DBG("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_offsets2(bufmgr_gem); if (ret == 0 && out_fence != NULL) *out_fence = execbuf.rsvd2 >> 32; skip_execution: 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_gem *bo_gem = to_bo_gem(bufmgr_gem->exec_bos[i]); bo_gem->idle = false; /* Disconnect the buffer from the validate list */ bo_gem->validate_index = -1; bufmgr_gem->exec_bos[i] = NULL; } bufmgr_gem->exec_count = 0; pthread_mutex_unlock(&bufmgr_gem->lock); return ret; } static int drm_intel_gem_bo_exec2(drm_intel_bo *bo, int used, drm_clip_rect_t *cliprects, int num_cliprects, int DR4) { return do_exec2(bo, used, NULL, cliprects, num_cliprects, DR4, -1, NULL, I915_EXEC_RENDER); } static int drm_intel_gem_bo_mrb_exec2(drm_intel_bo *bo, int used, drm_clip_rect_t *cliprects, int num_cliprects, int DR4, unsigned int flags) { return do_exec2(bo, used, NULL, cliprects, num_cliprects, DR4, -1, NULL, flags); } int drm_intel_gem_bo_context_exec(drm_intel_bo *bo, drm_intel_context *ctx, int used, unsigned int flags) { return do_exec2(bo, used, ctx, NULL, 0, 0, -1, NULL, flags); } int drm_intel_gem_bo_fence_exec(drm_intel_bo *bo, drm_intel_context *ctx, int used, int in_fence, int *out_fence, unsigned int flags) { return do_exec2(bo, used, ctx, NULL, 0, 0, in_fence, out_fence, flags); } 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; memclear(pin); pin.handle = bo_gem->gem_handle; pin.alignment = alignment; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_PIN, &pin); if (ret != 0) return -errno; bo->offset64 = pin.offset; 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; memclear(unpin); unpin.handle = bo_gem->gem_handle; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_UNPIN, &unpin); if (ret != 0) return -errno; return 0; } static int drm_intel_gem_bo_set_tiling_internal(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 && stride == bo_gem->stride) return 0; memset(&set_tiling, 0, sizeof(set_tiling)); do { /* set_tiling is slightly broken and overwrites the * input on the error path, so we have to open code * rmIoctl. */ 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); } while (ret == -1 && (errno == EINTR || errno == EAGAIN)); if (ret == -1) return -errno; bo_gem->tiling_mode = set_tiling.tiling_mode; bo_gem->swizzle_mode = set_tiling.swizzle_mode; bo_gem->stride = set_tiling.stride; 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; int ret; /* Tiling with userptr surfaces is not supported * on all hardware so refuse it for time being. */ if (bo_gem->is_userptr) return -EINVAL; /* Linear buffers have no stride. By ensuring that we only ever use * stride 0 with linear buffers, we simplify our code. */ if (*tiling_mode == I915_TILING_NONE) stride = 0; ret = drm_intel_gem_bo_set_tiling_internal(bo, *tiling_mode, stride); if (ret == 0) drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, 0); *tiling_mode = bo_gem->tiling_mode; return ret; } 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_set_softpin_offset(drm_intel_bo *bo, uint64_t offset) { drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; bo->offset64 = offset; bo->offset = offset; bo_gem->kflags |= EXEC_OBJECT_PINNED; return 0; } drm_intel_bo * drm_intel_bo_gem_create_from_prime(drm_intel_bufmgr *bufmgr, int prime_fd, int size) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr; int ret; uint32_t handle; drm_intel_bo_gem *bo_gem; struct drm_i915_gem_get_tiling get_tiling; pthread_mutex_lock(&bufmgr_gem->lock); ret = drmPrimeFDToHandle(bufmgr_gem->fd, prime_fd, &handle); if (ret) { DBG("create_from_prime: failed to obtain handle from fd: %s\n", strerror(errno)); pthread_mutex_unlock(&bufmgr_gem->lock); return NULL; } /* * See if the kernel has already returned this buffer to us. Just as * for named buffers, we must not create two bo's pointing at the same * kernel object */ HASH_FIND(handle_hh, bufmgr_gem->handle_table, &handle, sizeof(handle), bo_gem); if (bo_gem) { drm_intel_gem_bo_reference(&bo_gem->bo); goto out; } bo_gem = calloc(1, sizeof(*bo_gem)); if (!bo_gem) goto out; atomic_set(&bo_gem->refcount, 1); DRMINITLISTHEAD(&bo_gem->vma_list); /* Determine size of bo. The fd-to-handle ioctl really should * return the size, but it doesn't. If we have kernel 3.12 or * later, we can lseek on the prime fd to get the size. Older * kernels will just fail, in which case we fall back to the * provided (estimated or guess size). */ ret = lseek(prime_fd, 0, SEEK_END); if (ret != -1) bo_gem->bo.size = ret; else bo_gem->bo.size = size; bo_gem->bo.handle = handle; bo_gem->bo.bufmgr = bufmgr; bo_gem->gem_handle = handle; HASH_ADD(handle_hh, bufmgr_gem->handle_table, gem_handle, sizeof(bo_gem->gem_handle), bo_gem); bo_gem->name = "prime"; bo_gem->validate_index = -1; bo_gem->reloc_tree_fences = 0; bo_gem->used_as_reloc_target = false; bo_gem->has_error = false; bo_gem->reusable = false; memclear(get_tiling); get_tiling.handle = bo_gem->gem_handle; if (drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling)) goto err; bo_gem->tiling_mode = get_tiling.tiling_mode; bo_gem->swizzle_mode = get_tiling.swizzle_mode; /* XXX stride is unknown */ drm_intel_bo_gem_set_in_aperture_size(bufmgr_gem, bo_gem, 0); out: pthread_mutex_unlock(&bufmgr_gem->lock); return &bo_gem->bo; err: drm_intel_gem_bo_free(&bo_gem->bo); pthread_mutex_unlock(&bufmgr_gem->lock); return NULL; } int drm_intel_bo_gem_export_to_prime(drm_intel_bo *bo, int *prime_fd) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr; drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; if (drmPrimeHandleToFD(bufmgr_gem->fd, bo_gem->gem_handle, DRM_CLOEXEC, prime_fd) != 0) return -errno; bo_gem->reusable = false; 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; if (!bo_gem->global_name) { struct drm_gem_flink flink; memclear(flink); flink.handle = bo_gem->gem_handle; if (drmIoctl(bufmgr_gem->fd, DRM_IOCTL_GEM_FLINK, &flink)) return -errno; pthread_mutex_lock(&bufmgr_gem->lock); if (!bo_gem->global_name) { bo_gem->global_name = flink.name; bo_gem->reusable = false; HASH_ADD(name_hh, bufmgr_gem->name_table, global_name, sizeof(bo_gem->global_name), bo_gem); } pthread_mutex_unlock(&bufmgr_gem->lock); } *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 = true; } /** * Disables implicit synchronisation before executing the bo * * This will cause rendering corruption unless you correctly manage explicit * fences for all rendering involving this buffer - including use by others. * Disabling the implicit serialisation is only required if that serialisation * is too coarse (for example, you have split the buffer into many * non-overlapping regions and are sharing the whole buffer between concurrent * independent command streams). * * Note the kernel must advertise support via I915_PARAM_HAS_EXEC_ASYNC, * which can be checked using drm_intel_bufmgr_can_disable_implicit_sync, * or subsequent execbufs involving the bo will generate EINVAL. */ void drm_intel_gem_bo_disable_implicit_sync(drm_intel_bo *bo) { drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; bo_gem->kflags |= EXEC_OBJECT_ASYNC; } /** * Enables implicit synchronisation before executing the bo * * This is the default behaviour of the kernel, to wait upon prior writes * completing on the object before rendering with it, or to wait for prior * reads to complete before writing into the object. * drm_intel_gem_bo_disable_implicit_sync() can stop this behaviour, telling * the kernel never to insert a stall before using the object. Then this * function can be used to restore the implicit sync before subsequent * rendering. */ void drm_intel_gem_bo_enable_implicit_sync(drm_intel_bo *bo) { drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; bo_gem->kflags &= ~EXEC_OBJECT_ASYNC; } /** * Query whether the kernel supports disabling of its implicit synchronisation * before execbuf. See drm_intel_gem_bo_disable_implicit_sync() */ int drm_intel_bufmgr_gem_can_disable_implicit_sync(drm_intel_bufmgr *bufmgr) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bufmgr; return bufmgr_gem->has_exec_async; } /** * Enable use of fenced reloc type. * * New code should enable this to avoid unnecessary fence register * allocation. If this option is not enabled, all relocs will have fence * register allocated. */ void drm_intel_bufmgr_gem_enable_fenced_relocs(drm_intel_bufmgr *bufmgr) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bufmgr; if (bufmgr_gem->bufmgr.bo_exec == drm_intel_gem_bo_exec2) bufmgr_gem->fenced_relocs = true; } /** * 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 = true; for (i = 0; i < bo_gem->reloc_count; i++) total += drm_intel_gem_bo_get_aperture_space(bo_gem-> reloc_target_info[i].bo); 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 = false; for (i = 0; i < bo_gem->reloc_count; i++) drm_intel_gem_bo_clear_aperture_space_flag(bo_gem-> reloc_target_info[i].bo); } /** * 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 -ENOSPC; } 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 -ENOSPC; } 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 = false; return 0; } static int drm_intel_gem_bo_is_reusable(drm_intel_bo *bo) { drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo; return bo_gem->reusable; } 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_info[i].bo == target_bo) return 1; if (bo == bo_gem->reloc_target_info[i].bo) continue; if (_drm_intel_gem_bo_references(bo_gem->reloc_target_info[i].bo, target_bo)) return 1; } for (i = 0; i< bo_gem->softpin_target_count; i++) { if (bo_gem->softpin_target[i] == target_bo) return 1; if (_drm_intel_gem_bo_references(bo_gem->softpin_target[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; } static void add_bucket(drm_intel_bufmgr_gem *bufmgr_gem, int size) { unsigned int i = bufmgr_gem->num_buckets; assert(i < ARRAY_SIZE(bufmgr_gem->cache_bucket)); DRMINITLISTHEAD(&bufmgr_gem->cache_bucket[i].head); bufmgr_gem->cache_bucket[i].size = size; bufmgr_gem->num_buckets++; } static void init_cache_buckets(drm_intel_bufmgr_gem *bufmgr_gem) { unsigned long size, cache_max_size = 64 * 1024 * 1024; /* OK, so power of two buckets was too wasteful of memory. * Give 3 other sizes between each power of two, to hopefully * cover things accurately enough. (The alternative is * probably to just go for exact matching of sizes, and assume * that for things like composited window resize the tiled * width/height alignment and rounding of sizes to pages will * get us useful cache hit rates anyway) */ add_bucket(bufmgr_gem, 4096); add_bucket(bufmgr_gem, 4096 * 2); add_bucket(bufmgr_gem, 4096 * 3); /* Initialize the linked lists for BO reuse cache. */ for (size = 4 * 4096; size <= cache_max_size; size *= 2) { add_bucket(bufmgr_gem, size); add_bucket(bufmgr_gem, size + size * 1 / 4); add_bucket(bufmgr_gem, size + size * 2 / 4); add_bucket(bufmgr_gem, size + size * 3 / 4); } } void drm_intel_bufmgr_gem_set_vma_cache_size(drm_intel_bufmgr *bufmgr, int limit) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bufmgr; bufmgr_gem->vma_max = limit; drm_intel_gem_bo_purge_vma_cache(bufmgr_gem); } static int parse_devid_override(const char *devid_override) { static const struct { const char *name; int pci_id; } name_map[] = { { "brw", PCI_CHIP_I965_GM }, { "g4x", PCI_CHIP_GM45_GM }, { "ilk", PCI_CHIP_ILD_G }, { "snb", PCI_CHIP_SANDYBRIDGE_M_GT2_PLUS }, { "ivb", PCI_CHIP_IVYBRIDGE_S_GT2 }, { "hsw", PCI_CHIP_HASWELL_CRW_E_GT3 }, { "byt", PCI_CHIP_VALLEYVIEW_3 }, { "bdw", 0x1620 | BDW_ULX }, { "skl", PCI_CHIP_SKYLAKE_DT_GT2 }, { "kbl", PCI_CHIP_KABYLAKE_DT_GT2 }, }; unsigned int i; for (i = 0; i < ARRAY_SIZE(name_map); i++) { if (!strcmp(name_map[i].name, devid_override)) return name_map[i].pci_id; } return strtod(devid_override, NULL); } /** * Get the PCI ID for the device. This can be overridden by setting the * INTEL_DEVID_OVERRIDE environment variable to the desired ID. */ static int get_pci_device_id(drm_intel_bufmgr_gem *bufmgr_gem) { char *devid_override; int devid = 0; int ret; drm_i915_getparam_t gp; if (geteuid() == getuid()) { devid_override = getenv("INTEL_DEVID_OVERRIDE"); if (devid_override) { bufmgr_gem->no_exec = true; return parse_devid_override(devid_override); } } memclear(gp); gp.param = I915_PARAM_CHIPSET_ID; gp.value = &devid; ret = drmIoctl(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); } return devid; } int drm_intel_bufmgr_gem_get_devid(drm_intel_bufmgr *bufmgr) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bufmgr; return bufmgr_gem->pci_device; } /** * Sets the AUB filename. * * This function has to be called before drm_intel_bufmgr_gem_set_aub_dump() * for it to have any effect. */ void drm_intel_bufmgr_gem_set_aub_filename(drm_intel_bufmgr *bufmgr, const char *filename) { } /** * Sets up AUB dumping. * * This is a trace file format that can be used with the simulator. * Packets are emitted in a format somewhat like GPU command packets. * You can set up a GTT and upload your objects into the referenced * space, then send off batchbuffers and get BMPs out the other end. */ void drm_intel_bufmgr_gem_set_aub_dump(drm_intel_bufmgr *bufmgr, int enable) { fprintf(stderr, "libdrm aub dumping is deprecated.\n\n" "Use intel_aubdump from intel-gpu-tools instead. Install intel-gpu-tools,\n" "then run (for example)\n\n" "\t$ intel_aubdump --output=trace.aub glxgears -geometry 500x500\n\n" "See the intel_aubdump man page for more details.\n"); } drm_intel_context * drm_intel_gem_context_create(drm_intel_bufmgr *bufmgr) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bufmgr; struct drm_i915_gem_context_create create; drm_intel_context *context = NULL; int ret; context = calloc(1, sizeof(*context)); if (!context) return NULL; memclear(create); ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create); if (ret != 0) { DBG("DRM_IOCTL_I915_GEM_CONTEXT_CREATE failed: %s\n", strerror(errno)); free(context); return NULL; } context->ctx_id = create.ctx_id; context->bufmgr = bufmgr; return context; } int drm_intel_gem_context_get_id(drm_intel_context *ctx, uint32_t *ctx_id) { if (ctx == NULL) return -EINVAL; *ctx_id = ctx->ctx_id; return 0; } void drm_intel_gem_context_destroy(drm_intel_context *ctx) { drm_intel_bufmgr_gem *bufmgr_gem; struct drm_i915_gem_context_destroy destroy; int ret; if (ctx == NULL) return; memclear(destroy); bufmgr_gem = (drm_intel_bufmgr_gem *)ctx->bufmgr; destroy.ctx_id = ctx->ctx_id; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_CONTEXT_DESTROY, &destroy); if (ret != 0) fprintf(stderr, "DRM_IOCTL_I915_GEM_CONTEXT_DESTROY failed: %s\n", strerror(errno)); free(ctx); } int drm_intel_get_reset_stats(drm_intel_context *ctx, uint32_t *reset_count, uint32_t *active, uint32_t *pending) { drm_intel_bufmgr_gem *bufmgr_gem; struct drm_i915_reset_stats stats; int ret; if (ctx == NULL) return -EINVAL; memclear(stats); bufmgr_gem = (drm_intel_bufmgr_gem *)ctx->bufmgr; stats.ctx_id = ctx->ctx_id; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GET_RESET_STATS, &stats); if (ret == 0) { if (reset_count != NULL) *reset_count = stats.reset_count; if (active != NULL) *active = stats.batch_active; if (pending != NULL) *pending = stats.batch_pending; } return ret; } int drm_intel_reg_read(drm_intel_bufmgr *bufmgr, uint32_t offset, uint64_t *result) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bufmgr; struct drm_i915_reg_read reg_read; int ret; memclear(reg_read); reg_read.offset = offset; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_REG_READ, ®_read); *result = reg_read.val; return ret; } int drm_intel_get_subslice_total(int fd, unsigned int *subslice_total) { drm_i915_getparam_t gp; int ret; memclear(gp); gp.value = (int*)subslice_total; gp.param = I915_PARAM_SUBSLICE_TOTAL; ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp); if (ret) return -errno; return 0; } int drm_intel_get_eu_total(int fd, unsigned int *eu_total) { drm_i915_getparam_t gp; int ret; memclear(gp); gp.value = (int*)eu_total; gp.param = I915_PARAM_EU_TOTAL; ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp); if (ret) return -errno; return 0; } int drm_intel_get_pooled_eu(int fd) { drm_i915_getparam_t gp; int ret = -1; memclear(gp); gp.param = I915_PARAM_HAS_POOLED_EU; gp.value = &ret; if (drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp)) return -errno; return ret; } int drm_intel_get_min_eu_in_pool(int fd) { drm_i915_getparam_t gp; int ret = -1; memclear(gp); gp.param = I915_PARAM_MIN_EU_IN_POOL; gp.value = &ret; if (drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp)) return -errno; return ret; } /** * Annotate the given bo for use in aub dumping. * * \param annotations is an array of drm_intel_aub_annotation objects * describing the type of data in various sections of the bo. Each * element of the array specifies the type and subtype of a section of * the bo, and the past-the-end offset of that section. The elements * of \c annotations must be sorted so that ending_offset is * increasing. * * \param count is the number of elements in the \c annotations array. * If \c count is zero, then \c annotations will not be dereferenced. * * Annotations are copied into a private data structure, so caller may * re-use the memory pointed to by \c annotations after the call * returns. * * Annotations are stored for the lifetime of the bo; to reset to the * default state (no annotations), call this function with a \c count * of zero. */ void drm_intel_bufmgr_gem_set_aub_annotations(drm_intel_bo *bo, drm_intel_aub_annotation *annotations, unsigned count) { } static pthread_mutex_t bufmgr_list_mutex = PTHREAD_MUTEX_INITIALIZER; static drmMMListHead bufmgr_list = { &bufmgr_list, &bufmgr_list }; static drm_intel_bufmgr_gem * drm_intel_bufmgr_gem_find(int fd) { drm_intel_bufmgr_gem *bufmgr_gem; DRMLISTFOREACHENTRY(bufmgr_gem, &bufmgr_list, managers) { if (bufmgr_gem->fd == fd) { atomic_inc(&bufmgr_gem->refcount); return bufmgr_gem; } } return NULL; } static void drm_intel_bufmgr_gem_unref(drm_intel_bufmgr *bufmgr) { drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bufmgr; if (atomic_add_unless(&bufmgr_gem->refcount, -1, 1)) { pthread_mutex_lock(&bufmgr_list_mutex); if (atomic_dec_and_test(&bufmgr_gem->refcount)) { DRMLISTDEL(&bufmgr_gem->managers); drm_intel_bufmgr_gem_destroy(bufmgr); } pthread_mutex_unlock(&bufmgr_list_mutex); } } void *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; if (bo_gem->gtt_virtual) return bo_gem->gtt_virtual; if (bo_gem->is_userptr) return NULL; pthread_mutex_lock(&bufmgr_gem->lock); if (bo_gem->gtt_virtual == NULL) { struct drm_i915_gem_mmap_gtt mmap_arg; void *ptr; DBG("bo_map_gtt: mmap %d (%s), map_count=%d\n", bo_gem->gem_handle, bo_gem->name, bo_gem->map_count); if (bo_gem->map_count++ == 0) drm_intel_gem_bo_open_vma(bufmgr_gem, bo_gem); memclear(mmap_arg); mmap_arg.handle = bo_gem->gem_handle; /* Get the fake offset back... */ ptr = MAP_FAILED; if (drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg) == 0) { /* and mmap it */ ptr = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED, bufmgr_gem->fd, mmap_arg.offset); } if (ptr == MAP_FAILED) { if (--bo_gem->map_count == 0) drm_intel_gem_bo_close_vma(bufmgr_gem, bo_gem); ptr = NULL; } bo_gem->gtt_virtual = ptr; } pthread_mutex_unlock(&bufmgr_gem->lock); return bo_gem->gtt_virtual; } void *drm_intel_gem_bo_map__cpu(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; if (bo_gem->mem_virtual) return bo_gem->mem_virtual; if (bo_gem->is_userptr) { /* Return the same user ptr */ return bo_gem->user_virtual; } pthread_mutex_lock(&bufmgr_gem->lock); if (!bo_gem->mem_virtual) { struct drm_i915_gem_mmap mmap_arg; if (bo_gem->map_count++ == 0) drm_intel_gem_bo_open_vma(bufmgr_gem, bo_gem); DBG("bo_map: %d (%s), map_count=%d\n", bo_gem->gem_handle, bo_gem->name, bo_gem->map_count); memclear(mmap_arg); mmap_arg.handle = bo_gem->gem_handle; mmap_arg.size = bo->size; if (drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg)) { DBG("%s:%d: Error mapping buffer %d (%s): %s .\n", __FILE__, __LINE__, bo_gem->gem_handle, bo_gem->name, strerror(errno)); if (--bo_gem->map_count == 0) drm_intel_gem_bo_close_vma(bufmgr_gem, bo_gem); } else { VG(VALGRIND_MALLOCLIKE_BLOCK(mmap_arg.addr_ptr, mmap_arg.size, 0, 1)); bo_gem->mem_virtual = (void *)(uintptr_t) mmap_arg.addr_ptr; } } pthread_mutex_unlock(&bufmgr_gem->lock); return bo_gem->mem_virtual; } void *drm_intel_gem_bo_map__wc(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; if (bo_gem->wc_virtual) return bo_gem->wc_virtual; if (bo_gem->is_userptr) return NULL; pthread_mutex_lock(&bufmgr_gem->lock); if (!bo_gem->wc_virtual) { struct drm_i915_gem_mmap mmap_arg; if (bo_gem->map_count++ == 0) drm_intel_gem_bo_open_vma(bufmgr_gem, bo_gem); DBG("bo_map: %d (%s), map_count=%d\n", bo_gem->gem_handle, bo_gem->name, bo_gem->map_count); memclear(mmap_arg); mmap_arg.handle = bo_gem->gem_handle; mmap_arg.size = bo->size; mmap_arg.flags = I915_MMAP_WC; if (drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg)) { DBG("%s:%d: Error mapping buffer %d (%s): %s .\n", __FILE__, __LINE__, bo_gem->gem_handle, bo_gem->name, strerror(errno)); if (--bo_gem->map_count == 0) drm_intel_gem_bo_close_vma(bufmgr_gem, bo_gem); } else { VG(VALGRIND_MALLOCLIKE_BLOCK(mmap_arg.addr_ptr, mmap_arg.size, 0, 1)); bo_gem->wc_virtual = (void *)(uintptr_t) mmap_arg.addr_ptr; } } pthread_mutex_unlock(&bufmgr_gem->lock); return bo_gem->wc_virtual; } /** * 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, tmp; bool exec2 = false; pthread_mutex_lock(&bufmgr_list_mutex); bufmgr_gem = drm_intel_bufmgr_gem_find(fd); if (bufmgr_gem) goto exit; bufmgr_gem = calloc(1, sizeof(*bufmgr_gem)); if (bufmgr_gem == NULL) goto exit; bufmgr_gem->fd = fd; atomic_set(&bufmgr_gem->refcount, 1); if (pthread_mutex_init(&bufmgr_gem->lock, NULL) != 0) { free(bufmgr_gem); bufmgr_gem = NULL; goto exit; } memclear(aperture); ret = drmIoctl(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); } bufmgr_gem->pci_device = get_pci_device_id(bufmgr_gem); if (IS_GEN2(bufmgr_gem->pci_device)) bufmgr_gem->gen = 2; else if (IS_GEN3(bufmgr_gem->pci_device)) bufmgr_gem->gen = 3; else if (IS_GEN4(bufmgr_gem->pci_device)) bufmgr_gem->gen = 4; else if (IS_GEN5(bufmgr_gem->pci_device)) bufmgr_gem->gen = 5; else if (IS_GEN6(bufmgr_gem->pci_device)) bufmgr_gem->gen = 6; else if (IS_GEN7(bufmgr_gem->pci_device)) bufmgr_gem->gen = 7; else if (IS_GEN8(bufmgr_gem->pci_device)) bufmgr_gem->gen = 8; else if (IS_GEN9(bufmgr_gem->pci_device)) bufmgr_gem->gen = 9; else if (IS_GEN10(bufmgr_gem->pci_device)) bufmgr_gem->gen = 10; else { free(bufmgr_gem); bufmgr_gem = NULL; goto exit; } if (IS_GEN3(bufmgr_gem->pci_device) && bufmgr_gem->gtt_size > 256*1024*1024) { /* The unmappable part of gtt on gen 3 (i.e. above 256MB) can't * be used for tiled blits. To simplify the accounting, just * subtract the unmappable part (fixed to 256MB on all known * gen3 devices) if the kernel advertises it. */ bufmgr_gem->gtt_size -= 256*1024*1024; } memclear(gp); gp.value = &tmp; gp.param = I915_PARAM_HAS_EXECBUF2; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); if (!ret) exec2 = true; gp.param = I915_PARAM_HAS_BSD; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); bufmgr_gem->has_bsd = ret == 0; gp.param = I915_PARAM_HAS_BLT; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); bufmgr_gem->has_blt = ret == 0; gp.param = I915_PARAM_HAS_RELAXED_FENCING; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); bufmgr_gem->has_relaxed_fencing = ret == 0; gp.param = I915_PARAM_HAS_EXEC_ASYNC; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); bufmgr_gem->has_exec_async = ret == 0; bufmgr_gem->bufmgr.bo_alloc_userptr = check_bo_alloc_userptr; gp.param = I915_PARAM_HAS_WAIT_TIMEOUT; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); bufmgr_gem->has_wait_timeout = ret == 0; gp.param = I915_PARAM_HAS_LLC; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); if (ret != 0) { /* Kernel does not supports HAS_LLC query, fallback to GPU * generation detection and assume that we have LLC on GEN6/7 */ bufmgr_gem->has_llc = (IS_GEN6(bufmgr_gem->pci_device) | IS_GEN7(bufmgr_gem->pci_device)); } else bufmgr_gem->has_llc = *gp.value; gp.param = I915_PARAM_HAS_VEBOX; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); bufmgr_gem->has_vebox = (ret == 0) & (*gp.value > 0); gp.param = I915_PARAM_HAS_EXEC_SOFTPIN; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); if (ret == 0 && *gp.value > 0) bufmgr_gem->bufmgr.bo_set_softpin_offset = drm_intel_gem_bo_set_softpin_offset; if (bufmgr_gem->gen < 4) { gp.param = I915_PARAM_NUM_FENCES_AVAIL; gp.value = &bufmgr_gem->available_fences; ret = drmIoctl(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; } else { /* XXX The kernel reports the total number of fences, * including any that may be pinned. * * We presume that there will be at least one pinned * fence for the scanout buffer, but there may be more * than one scanout and the user may be manually * pinning buffers. Let's move to execbuffer2 and * thereby forget the insanity of using fences... */ bufmgr_gem->available_fences -= 2; if (bufmgr_gem->available_fences < 0) bufmgr_gem->available_fences = 0; } } if (bufmgr_gem->gen >= 8) { gp.param = I915_PARAM_HAS_ALIASING_PPGTT; ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp); if (ret == 0 && *gp.value == 3) bufmgr_gem->bufmgr.bo_use_48b_address_range = drm_intel_gem_bo_use_48b_address_range; } /* 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_emit_reloc_fence = drm_intel_gem_bo_emit_reloc_fence; 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; /* Use the new one if available */ if (exec2) { bufmgr_gem->bufmgr.bo_exec = drm_intel_gem_bo_exec2; bufmgr_gem->bufmgr.bo_mrb_exec = drm_intel_gem_bo_mrb_exec2; } else bufmgr_gem->bufmgr.bo_exec = drm_intel_gem_bo_exec; bufmgr_gem->bufmgr.bo_busy = drm_intel_gem_bo_busy; bufmgr_gem->bufmgr.bo_madvise = drm_intel_gem_bo_madvise; bufmgr_gem->bufmgr.destroy = drm_intel_bufmgr_gem_unref; 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.bo_is_reusable = drm_intel_gem_bo_is_reusable; 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; init_cache_buckets(bufmgr_gem); DRMINITLISTHEAD(&bufmgr_gem->vma_cache); bufmgr_gem->vma_max = -1; /* unlimited by default */ DRMLISTADD(&bufmgr_gem->managers, &bufmgr_list); exit: pthread_mutex_unlock(&bufmgr_list_mutex); return bufmgr_gem != NULL ? &bufmgr_gem->bufmgr : NULL; }