1 /* $NetBSD: i915_gem_object_types.h,v 1.7 2021/12/19 12:26:55 riastradh Exp $ */ 2 3 /* 4 * SPDX-License-Identifier: MIT 5 * 6 * Copyright 2016 Intel Corporation 7 */ 8 9 #ifndef __I915_GEM_OBJECT_TYPES_H__ 10 #define __I915_GEM_OBJECT_TYPES_H__ 11 12 #include <drm/drm_gem.h> 13 #include <uapi/drm/i915_drm.h> 14 15 #include "i915_active.h" 16 #include "i915_selftest.h" 17 18 struct drm_i915_gem_object; 19 struct intel_fronbuffer; 20 21 /* 22 * struct i915_lut_handle tracks the fast lookups from handle to vma used 23 * for execbuf. Although we use a radixtree for that mapping, in order to 24 * remove them as the object or context is closed, we need a secondary list 25 * and a translation entry (i915_lut_handle). 26 */ 27 struct i915_lut_handle { 28 struct list_head obj_link; 29 struct i915_gem_context *ctx; 30 u32 handle; 31 }; 32 33 struct drm_i915_gem_object_ops { 34 unsigned int flags; 35 #define I915_GEM_OBJECT_HAS_STRUCT_PAGE BIT(0) 36 #define I915_GEM_OBJECT_HAS_IOMEM BIT(1) 37 #define I915_GEM_OBJECT_IS_SHRINKABLE BIT(2) 38 #define I915_GEM_OBJECT_IS_PROXY BIT(3) 39 #define I915_GEM_OBJECT_NO_GGTT BIT(4) 40 #define I915_GEM_OBJECT_ASYNC_CANCEL BIT(5) 41 42 /* Interface between the GEM object and its backing storage. 43 * get_pages() is called once prior to the use of the associated set 44 * of pages before to binding them into the GTT, and put_pages() is 45 * called after we no longer need them. As we expect there to be 46 * associated cost with migrating pages between the backing storage 47 * and making them available for the GPU (e.g. clflush), we may hold 48 * onto the pages after they are no longer referenced by the GPU 49 * in case they may be used again shortly (for example migrating the 50 * pages to a different memory domain within the GTT). put_pages() 51 * will therefore most likely be called when the object itself is 52 * being released or under memory pressure (where we attempt to 53 * reap pages for the shrinker). 54 */ 55 int (*get_pages)(struct drm_i915_gem_object *obj); 56 void (*put_pages)(struct drm_i915_gem_object *obj, 57 struct sg_table *pages); 58 void (*truncate)(struct drm_i915_gem_object *obj); 59 void (*writeback)(struct drm_i915_gem_object *obj); 60 61 int (*pwrite)(struct drm_i915_gem_object *obj, 62 const struct drm_i915_gem_pwrite *arg); 63 64 int (*dmabuf_export)(struct drm_i915_gem_object *obj); 65 void (*release)(struct drm_i915_gem_object *obj); 66 }; 67 68 enum i915_mmap_type { 69 I915_MMAP_TYPE_GTT = 0, 70 I915_MMAP_TYPE_WC, 71 I915_MMAP_TYPE_WB, 72 I915_MMAP_TYPE_UC, 73 I915_MMAP_NTYPES 74 }; 75 76 struct i915_mmap_offset { 77 struct drm_vma_offset_node vma_node; 78 struct drm_i915_gem_object *obj; 79 enum i915_mmap_type mmap_type; 80 81 #ifdef __NetBSD__ 82 struct uvm_object uobj; 83 #else 84 struct rb_node offset; 85 #endif 86 }; 87 88 struct drm_i915_gem_object { 89 struct drm_gem_object base; 90 91 const struct drm_i915_gem_object_ops *ops; 92 93 struct { 94 /** 95 * @vma.lock: protect the list/tree of vmas 96 */ 97 spinlock_t lock; 98 99 /** 100 * @vma.list: List of VMAs backed by this object 101 * 102 * The VMA on this list are ordered by type, all GGTT vma are 103 * placed at the head and all ppGTT vma are placed at the tail. 104 * The different types of GGTT vma are unordered between 105 * themselves, use the @vma.tree (which has a defined order 106 * between all VMA) to quickly find an exact match. 107 */ 108 struct list_head list; 109 110 /** 111 * @vma.tree: Ordered tree of VMAs backed by this object 112 * 113 * All VMA created for this object are placed in the @vma.tree 114 * for fast retrieval via a binary search in 115 * i915_vma_instance(). They are also added to @vma.list for 116 * easy iteration. 117 */ 118 struct rb_root tree; 119 } vma; 120 121 /** 122 * @lut_list: List of vma lookup entries in use for this object. 123 * 124 * If this object is closed, we need to remove all of its VMA from 125 * the fast lookup index in associated contexts; @lut_list provides 126 * this translation from object to context->handles_vma. 127 */ 128 struct list_head lut_list; 129 130 /** Stolen memory for this object, instead of being backed by shmem. */ 131 struct drm_mm_node *stolen; 132 union { 133 struct rcu_head rcu; 134 struct llist_node freed; 135 }; 136 137 /** 138 * Whether the object is currently in the GGTT mmap. 139 */ 140 unsigned int userfault_count; 141 struct list_head userfault_link; 142 143 struct { 144 spinlock_t lock; /* Protects access to mmo offsets */ 145 #ifdef __NetBSD__ 146 struct i915_mmap_offset *offsets[I915_MMAP_NTYPES]; 147 #else 148 struct rb_root offsets; 149 #endif 150 } mmo; 151 152 I915_SELFTEST_DECLARE(struct list_head st_link); 153 154 unsigned long flags; 155 #define I915_BO_ALLOC_CONTIGUOUS BIT(0) 156 #define I915_BO_ALLOC_VOLATILE BIT(1) 157 #define I915_BO_ALLOC_FLAGS (I915_BO_ALLOC_CONTIGUOUS | I915_BO_ALLOC_VOLATILE) 158 #define I915_BO_READONLY BIT(2) 159 160 /* 161 * Is the object to be mapped as read-only to the GPU 162 * Only honoured if hardware has relevant pte bit 163 */ 164 unsigned int cache_level:3; 165 unsigned int cache_coherent:2; 166 #define I915_BO_CACHE_COHERENT_FOR_READ BIT(0) 167 #define I915_BO_CACHE_COHERENT_FOR_WRITE BIT(1) 168 unsigned int cache_dirty:1; 169 170 /** 171 * @read_domains: Read memory domains. 172 * 173 * These monitor which caches contain read/write data related to the 174 * object. When transitioning from one set of domains to another, 175 * the driver is called to ensure that caches are suitably flushed and 176 * invalidated. 177 */ 178 u16 read_domains; 179 180 /** 181 * @write_domain: Corresponding unique write memory domain. 182 */ 183 u16 write_domain; 184 185 struct intel_frontbuffer __rcu *frontbuffer; 186 187 /** Current tiling stride for the object, if it's tiled. */ 188 unsigned int tiling_and_stride; 189 #define FENCE_MINIMUM_STRIDE 128 /* See i915_tiling_ok() */ 190 #define TILING_MASK (FENCE_MINIMUM_STRIDE - 1) 191 #define STRIDE_MASK (~TILING_MASK) 192 193 /** Count of VMA actually bound by this object */ 194 atomic_t bind_count; 195 196 struct { 197 /* 198 * Protects the pages and their use. Do not use directly, but 199 * instead go through the pin/unpin interfaces. 200 */ 201 struct mutex lock; 202 atomic_t pages_pin_count; 203 atomic_t shrink_pin; 204 205 /** 206 * Memory region for this object. 207 */ 208 struct intel_memory_region *region; 209 /** 210 * List of memory region blocks allocated for this object. 211 */ 212 struct list_head blocks; 213 /** 214 * Element within memory_region->objects or region->purgeable 215 * if the object is marked as DONTNEED. Access is protected by 216 * region->obj_lock. 217 */ 218 struct list_head region_link; 219 220 #ifdef __NetBSD__ 221 /* internal objects */ 222 union { 223 struct { 224 bus_dma_segment_t *segs; 225 int nsegs; 226 int rsegs; 227 } internal; 228 struct { 229 bus_dma_segment_t seg; 230 void *kva; 231 } phys; 232 } u; 233 #endif 234 235 struct sg_table *pages; 236 void *mapping; 237 238 struct i915_page_sizes { 239 /** 240 * The sg mask of the pages sg_table. i.e the mask of 241 * of the lengths for each sg entry. 242 */ 243 unsigned int phys; 244 245 /** 246 * The gtt page sizes we are allowed to use given the 247 * sg mask and the supported page sizes. This will 248 * express the smallest unit we can use for the whole 249 * object, as well as the larger sizes we may be able 250 * to use opportunistically. 251 */ 252 unsigned int sg; 253 254 /** 255 * The actual gtt page size usage. Since we can have 256 * multiple vma associated with this object we need to 257 * prevent any trampling of state, hence a copy of this 258 * struct also lives in each vma, therefore the gtt 259 * value here should only be read/write through the vma. 260 */ 261 unsigned int gtt; 262 } page_sizes; 263 264 I915_SELFTEST_DECLARE(unsigned int page_mask); 265 266 struct i915_gem_object_page_iter { 267 struct scatterlist *sg_pos; 268 unsigned int sg_idx; /* in pages, but 32bit eek! */ 269 270 struct radix_tree_root radix; 271 struct mutex lock; /* protects this cache */ 272 } get_page; 273 274 /** 275 * Element within i915->mm.unbound_list or i915->mm.bound_list, 276 * locked by i915->mm.obj_lock. 277 */ 278 struct list_head link; 279 280 /** 281 * Advice: are the backing pages purgeable? 282 */ 283 unsigned int madv:2; 284 285 /** 286 * This is set if the object has been written to since the 287 * pages were last acquired. 288 */ 289 bool dirty:1; 290 291 /** 292 * This is set if the object has been pinned due to unknown 293 * swizzling. 294 */ 295 bool quirked:1; 296 } mm; 297 298 /** Record of address bit 17 of each page at last unbind. */ 299 unsigned long *bit_17; 300 301 union { 302 struct i915_gem_userptr { 303 uintptr_t ptr; 304 305 struct i915_mm_struct *mm; 306 struct i915_mmu_object *mmu_object; 307 struct work_struct *work; 308 } userptr; 309 310 unsigned long scratch; 311 312 void *gvt_info; 313 }; 314 }; 315 316 static inline struct drm_i915_gem_object * 317 to_intel_bo(struct drm_gem_object *gem) 318 { 319 /* Assert that to_intel_bo(NULL) == NULL */ 320 BUILD_BUG_ON(offsetof(struct drm_i915_gem_object, base)); 321 322 return container_of(gem, struct drm_i915_gem_object, base); 323 } 324 325 #endif 326
Indexes created Sat Sep 20 22:09:52 GMT 2025