/* * Copyright © 2016 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * */ #include <linux/sched/mm.h> #include <linux/dma-fence-array.h> #include <drm/drm_gem.h> #include "display/intel_display.h" #include "display/intel_frontbuffer.h" #include "gem/i915_gem_lmem.h" #include "gem/i915_gem_object_frontbuffer.h" #include "gem/i915_gem_tiling.h" #include "gt/intel_engine.h" #include "gt/intel_engine_heartbeat.h" #include "gt/intel_gt.h" #include "gt/intel_gt_pm.h" #include "gt/intel_gt_requests.h" #include "gt/intel_tlb.h" #include "i915_drv.h" #include "i915_gem_evict.h" #include "i915_sw_fence_work.h" #include "i915_trace.h" #include "i915_vma.h" #include "i915_vma_resource.h" static inline void assert_vma_held_evict(const struct i915_vma *vma) { … } static struct kmem_cache *slab_vmas; static struct i915_vma *i915_vma_alloc(void) { … } static void i915_vma_free(struct i915_vma *vma) { … } #if IS_ENABLED(CONFIG_DRM_I915_ERRLOG_GEM) && IS_ENABLED(CONFIG_DRM_DEBUG_MM) #include <linux/stackdepot.h> static void vma_print_allocator(struct i915_vma *vma, const char *reason) { char buf[512]; if (!vma->node.stack) { drm_dbg(vma->obj->base.dev, "vma.node [%08llx + %08llx] %s: unknown owner\n", vma->node.start, vma->node.size, reason); return; } stack_depot_snprint(vma->node.stack, buf, sizeof(buf), 0); drm_dbg(vma->obj->base.dev, "vma.node [%08llx + %08llx] %s: inserted at %s\n", vma->node.start, vma->node.size, reason, buf); } #else static void vma_print_allocator(struct i915_vma *vma, const char *reason) { … } #endif static inline struct i915_vma *active_to_vma(struct i915_active *ref) { … } static int __i915_vma_active(struct i915_active *ref) { … } static void __i915_vma_retire(struct i915_active *ref) { … } static struct i915_vma * vma_create(struct drm_i915_gem_object *obj, struct i915_address_space *vm, const struct i915_gtt_view *view) { … } static struct i915_vma * i915_vma_lookup(struct drm_i915_gem_object *obj, struct i915_address_space *vm, const struct i915_gtt_view *view) { … } /** * i915_vma_instance - return the singleton instance of the VMA * @obj: parent &struct drm_i915_gem_object to be mapped * @vm: address space in which the mapping is located * @view: additional mapping requirements * * i915_vma_instance() looks up an existing VMA of the @obj in the @vm with * the same @view characteristics. If a match is not found, one is created. * Once created, the VMA is kept until either the object is freed, or the * address space is closed. * * Returns the vma, or an error pointer. */ struct i915_vma * i915_vma_instance(struct drm_i915_gem_object *obj, struct i915_address_space *vm, const struct i915_gtt_view *view) { … } struct i915_vma_work { … }; static void __vma_bind(struct dma_fence_work *work) { … } static void __vma_release(struct dma_fence_work *work) { … } static const struct dma_fence_work_ops bind_ops = …; struct i915_vma_work *i915_vma_work(void) { … } int i915_vma_wait_for_bind(struct i915_vma *vma) { … } #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) static int i915_vma_verify_bind_complete(struct i915_vma *vma) { struct dma_fence *fence = i915_active_fence_get(&vma->active.excl); int err; if (!fence) return 0; if (dma_fence_is_signaled(fence)) err = fence->error; else err = -EBUSY; dma_fence_put(fence); return err; } #else #define i915_vma_verify_bind_complete(_vma) … #endif I915_SELFTEST_EXPORT void i915_vma_resource_init_from_vma(struct i915_vma_resource *vma_res, struct i915_vma *vma) { … } /** * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space. * @vma: VMA to map * @pat_index: PAT index to set in PTE * @flags: flags like global or local mapping * @work: preallocated worker for allocating and binding the PTE * @vma_res: pointer to a preallocated vma resource. The resource is either * consumed or freed. * * DMA addresses are taken from the scatter-gather table of this object (or of * this VMA in case of non-default GGTT views) and PTE entries set up. * Note that DMA addresses are also the only part of the SG table we care about. */ int i915_vma_bind(struct i915_vma *vma, unsigned int pat_index, u32 flags, struct i915_vma_work *work, struct i915_vma_resource *vma_res) { … } void __iomem *i915_vma_pin_iomap(struct i915_vma *vma) { … } void i915_vma_flush_writes(struct i915_vma *vma) { … } void i915_vma_unpin_iomap(struct i915_vma *vma) { … } void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags) { … } bool i915_vma_misplaced(const struct i915_vma *vma, u64 size, u64 alignment, u64 flags) { … } void __i915_vma_set_map_and_fenceable(struct i915_vma *vma) { … } bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long color) { … } /** * i915_vma_insert - finds a slot for the vma in its address space * @vma: the vma * @ww: An optional struct i915_gem_ww_ctx * @size: requested size in bytes (can be larger than the VMA) * @alignment: required alignment * @flags: mask of PIN_* flags to use * * First we try to allocate some free space that meets the requirements for * the VMA. Failiing that, if the flags permit, it will evict an old VMA, * preferrably the oldest idle entry to make room for the new VMA. * * Returns: * 0 on success, negative error code otherwise. */ static int i915_vma_insert(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, u64 size, u64 alignment, u64 flags) { … } static void i915_vma_detach(struct i915_vma *vma) { … } static bool try_qad_pin(struct i915_vma *vma, unsigned int flags) { … } static struct scatterlist * rotate_pages(struct drm_i915_gem_object *obj, unsigned int offset, unsigned int width, unsigned int height, unsigned int src_stride, unsigned int dst_stride, struct sg_table *st, struct scatterlist *sg) { … } static noinline struct sg_table * intel_rotate_pages(struct intel_rotation_info *rot_info, struct drm_i915_gem_object *obj) { … } static struct scatterlist * add_padding_pages(unsigned int count, struct sg_table *st, struct scatterlist *sg) { … } static struct scatterlist * remap_tiled_color_plane_pages(struct drm_i915_gem_object *obj, unsigned long offset, unsigned int alignment_pad, unsigned int width, unsigned int height, unsigned int src_stride, unsigned int dst_stride, struct sg_table *st, struct scatterlist *sg, unsigned int *gtt_offset) { … } static struct scatterlist * remap_contiguous_pages(struct drm_i915_gem_object *obj, pgoff_t obj_offset, unsigned int count, struct sg_table *st, struct scatterlist *sg) { … } static struct scatterlist * remap_linear_color_plane_pages(struct drm_i915_gem_object *obj, pgoff_t obj_offset, unsigned int alignment_pad, unsigned int size, struct sg_table *st, struct scatterlist *sg, unsigned int *gtt_offset) { … } static struct scatterlist * remap_color_plane_pages(const struct intel_remapped_info *rem_info, struct drm_i915_gem_object *obj, int color_plane, struct sg_table *st, struct scatterlist *sg, unsigned int *gtt_offset) { … } static noinline struct sg_table * intel_remap_pages(struct intel_remapped_info *rem_info, struct drm_i915_gem_object *obj) { … } static noinline struct sg_table * intel_partial_pages(const struct i915_gtt_view *view, struct drm_i915_gem_object *obj) { … } static int __i915_vma_get_pages(struct i915_vma *vma) { … } I915_SELFTEST_EXPORT int i915_vma_get_pages(struct i915_vma *vma) { … } void vma_invalidate_tlb(struct i915_address_space *vm, u32 *tlb) { … } static void __vma_put_pages(struct i915_vma *vma, unsigned int count) { … } I915_SELFTEST_EXPORT void i915_vma_put_pages(struct i915_vma *vma) { … } static void vma_unbind_pages(struct i915_vma *vma) { … } int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, u64 size, u64 alignment, u64 flags) { … } static void flush_idle_contexts(struct intel_gt *gt) { … } static int __i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, u32 align, unsigned int flags) { … } int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, u32 align, unsigned int flags) { … } /** * i915_ggtt_clear_scanout - Clear scanout flag for all objects ggtt vmas * @obj: i915 GEM object * This function clears scanout flags for objects ggtt vmas. These flags are set * when object is pinned for display use and this function to clear them all is * targeted to be called by frontbuffer tracking code when the frontbuffer is * about to be released. */ void i915_ggtt_clear_scanout(struct drm_i915_gem_object *obj) { … } static void __vma_close(struct i915_vma *vma, struct intel_gt *gt) { … } void i915_vma_close(struct i915_vma *vma) { … } static void __i915_vma_remove_closed(struct i915_vma *vma) { … } void i915_vma_reopen(struct i915_vma *vma) { … } static void force_unbind(struct i915_vma *vma) { … } static void release_references(struct i915_vma *vma, struct intel_gt *gt, bool vm_ddestroy) { … } /* * i915_vma_destroy_locked - Remove all weak reference to the vma and put * the initial reference. * * This function should be called when it's decided the vma isn't needed * anymore. The caller must assure that it doesn't race with another lookup * plus destroy, typically by taking an appropriate reference. * * Current callsites are * - __i915_gem_object_pages_fini() * - __i915_vm_close() - Blocks the above function by taking a reference on * the object. * - __i915_vma_parked() - Blocks the above functions by taking a reference * on the vm and a reference on the object. Also takes the object lock so * destruction from __i915_vma_parked() can be blocked by holding the * object lock. Since the object lock is only allowed from within i915 with * an object refcount, holding the object lock also implicitly blocks the * vma freeing from __i915_gem_object_pages_fini(). * * Because of locks taken during destruction, a vma is also guaranteed to * stay alive while the following locks are held if it was looked up while * holding one of the locks: * - vm->mutex * - obj->vma.lock * - gt->closed_lock */ void i915_vma_destroy_locked(struct i915_vma *vma) { … } void i915_vma_destroy(struct i915_vma *vma) { … } void i915_vma_parked(struct intel_gt *gt) { … } static void __i915_vma_iounmap(struct i915_vma *vma) { … } void i915_vma_revoke_mmap(struct i915_vma *vma) { … } static int __i915_request_await_bind(struct i915_request *rq, struct i915_vma *vma) { … } static int __i915_vma_move_to_active(struct i915_vma *vma, struct i915_request *rq) { … } int _i915_vma_move_to_active(struct i915_vma *vma, struct i915_request *rq, struct dma_fence *fence, unsigned int flags) { … } struct dma_fence *__i915_vma_evict(struct i915_vma *vma, bool async) { … } int __i915_vma_unbind(struct i915_vma *vma) { … } static struct dma_fence *__i915_vma_unbind_async(struct i915_vma *vma) { … } int i915_vma_unbind(struct i915_vma *vma) { … } int i915_vma_unbind_async(struct i915_vma *vma, bool trylock_vm) { … } int i915_vma_unbind_unlocked(struct i915_vma *vma) { … } struct i915_vma *i915_vma_make_unshrinkable(struct i915_vma *vma) { … } void i915_vma_make_shrinkable(struct i915_vma *vma) { … } void i915_vma_make_purgeable(struct i915_vma *vma) { … } #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) #include "selftests/i915_vma.c" #endif void i915_vma_module_exit(void) { … } int __init i915_vma_module_init(void) { … }
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