1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2019 Intel Corporation 4 */ 5 6 #include <uapi/drm/i915_drm.h> 7 8 #include "intel_memory_region.h" 9 #include "gem/i915_gem_region.h" 10 #include "gem/i915_gem_lmem.h" 11 #include "i915_drv.h" 12 13 void __iomem * 14 i915_gem_object_lmem_io_map(struct drm_i915_gem_object *obj, 15 unsigned long n, 16 unsigned long size) 17 { 18 resource_size_t offset; 19 20 GEM_BUG_ON(!i915_gem_object_is_contiguous(obj)); 21 22 offset = i915_gem_object_get_dma_address(obj, n); 23 offset -= obj->mm.region->region.start; 24 25 return io_mapping_map_wc(&obj->mm.region->iomap, offset, size); 26 } 27 28 /** 29 * i915_gem_object_is_lmem - Whether the object is resident in 30 * lmem 31 * @obj: The object to check. 32 * 33 * Even if an object is allowed to migrate and change memory region, 34 * this function checks whether it will always be present in lmem when 35 * valid *or* if that's not the case, whether it's currently resident in lmem. 36 * For migratable and evictable objects, the latter only makes sense when 37 * the object is locked. 38 * 39 * Return: Whether the object migratable but resident in lmem, or not 40 * migratable and will be present in lmem when valid. 41 */ 42 bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj) 43 { 44 struct intel_memory_region *mr = READ_ONCE(obj->mm.region); 45 46 #ifdef CONFIG_LOCKDEP 47 if (i915_gem_object_migratable(obj) && 48 i915_gem_object_evictable(obj)) 49 assert_object_held(obj); 50 #endif 51 return mr && (mr->type == INTEL_MEMORY_LOCAL || 52 mr->type == INTEL_MEMORY_STOLEN_LOCAL); 53 } 54 55 /** 56 * __i915_gem_object_is_lmem - Whether the object is resident in 57 * lmem while in the fence signaling critical path. 58 * @obj: The object to check. 59 * 60 * This function is intended to be called from within the fence signaling 61 * path where the fence, or a pin, keeps the object from being migrated. For 62 * example during gpu reset or similar. 63 * 64 * Return: Whether the object is resident in lmem. 65 */ 66 bool __i915_gem_object_is_lmem(struct drm_i915_gem_object *obj) 67 { 68 struct intel_memory_region *mr = READ_ONCE(obj->mm.region); 69 70 #ifdef CONFIG_LOCKDEP 71 GEM_WARN_ON(dma_resv_test_signaled(obj->base.resv, DMA_RESV_USAGE_BOOKKEEP) && 72 i915_gem_object_evictable(obj)); 73 #endif 74 return mr && (mr->type == INTEL_MEMORY_LOCAL || 75 mr->type == INTEL_MEMORY_STOLEN_LOCAL); 76 } 77 78 /** 79 * __i915_gem_object_create_lmem_with_ps - Create lmem object and force the 80 * minimum page size for the backing pages. 81 * @i915: The i915 instance. 82 * @size: The size in bytes for the object. Note that we need to round the size 83 * up depending on the @page_size. The final object size can be fished out from 84 * the drm GEM object. 85 * @page_size: The requested minimum page size in bytes for this object. This is 86 * useful if we need something bigger than the regions min_page_size due to some 87 * hw restriction, or in some very specialised cases where it needs to be 88 * smaller, where the internal fragmentation cost is too great when rounding up 89 * the object size. 90 * @flags: The optional BO allocation flags. 91 * 92 * Note that this interface assumes you know what you are doing when forcing the 93 * @page_size. If this is smaller than the regions min_page_size then it can 94 * never be inserted into any GTT, otherwise it might lead to undefined 95 * behaviour. 96 * 97 * Return: The object pointer, which might be an ERR_PTR in the case of failure. 98 */ 99 struct drm_i915_gem_object * 100 __i915_gem_object_create_lmem_with_ps(struct drm_i915_private *i915, 101 resource_size_t size, 102 resource_size_t page_size, 103 unsigned int flags) 104 { 105 return i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_LMEM_0], 106 size, page_size, flags); 107 } 108 109 struct drm_i915_gem_object * 110 i915_gem_object_create_lmem_from_data(struct drm_i915_private *i915, 111 const void *data, size_t size) 112 { 113 struct drm_i915_gem_object *obj; 114 void *map; 115 116 obj = i915_gem_object_create_lmem(i915, 117 round_up(size, PAGE_SIZE), 118 I915_BO_ALLOC_CONTIGUOUS); 119 if (IS_ERR(obj)) 120 return obj; 121 122 map = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WC); 123 if (IS_ERR(map)) { 124 i915_gem_object_put(obj); 125 return map; 126 } 127 128 memcpy(map, data, size); 129 130 i915_gem_object_unpin_map(obj); 131 132 return obj; 133 } 134 135 struct drm_i915_gem_object * 136 i915_gem_object_create_lmem(struct drm_i915_private *i915, 137 resource_size_t size, 138 unsigned int flags) 139 { 140 return i915_gem_object_create_region(i915->mm.regions[INTEL_REGION_LMEM_0], 141 size, 0, flags); 142 } 143