drivers/gpu/drm/i915/i915_vma.h

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #ifndef __I915_VMA_H__
  26 #define __I915_VMA_H__
  27
  28 #include <linux/io-mapping.h>
  29 #include <linux/rbtree.h>
  30
  31 #include <drm/drm_mm.h>
  32
  33 #include "gem/i915_gem_object.h"
  34
  35 #include "i915_gem_gtt.h"
  36 #include "i915_gem_fence_reg.h"
  37
  38 #include "i915_active.h"
  39 #include "i915_request.h"
  40 #include "i915_vma_types.h"
  41
  42 struct i915_vma *
  43 i915_vma_instance(struct drm_i915_gem_object *obj,
  44                   struct i915_address_space *vm,
  45                   const struct i915_ggtt_view *view);
  46
  47 void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags);
  48 #define I915_VMA_RELEASE_MAP BIT(0)
  49
  50 static inline bool i915_vma_is_active(const struct i915_vma *vma)
  51 {
  52         return !i915_active_is_idle(&vma->active);
  53 }
  54
  55 int __must_check __i915_vma_move_to_active(struct i915_vma *vma,
  56                                            struct i915_request *rq);
  57 int __must_check i915_vma_move_to_active(struct i915_vma *vma,
  58                                          struct i915_request *rq,
  59                                          unsigned int flags);
  60
  61 #define __i915_vma_flags(v) ((unsigned long *)&(v)->flags.counter)
  62
  63 static inline bool i915_vma_is_ggtt(const struct i915_vma *vma)
  64 {
  65         return test_bit(I915_VMA_GGTT_BIT, __i915_vma_flags(vma));
  66 }
  67
  68 static inline bool i915_vma_has_ggtt_write(const struct i915_vma *vma)
  69 {
  70         return test_bit(I915_VMA_GGTT_WRITE_BIT, __i915_vma_flags(vma));
  71 }
  72
  73 static inline void i915_vma_set_ggtt_write(struct i915_vma *vma)
  74 {
  75         GEM_BUG_ON(!i915_vma_is_ggtt(vma));
  76         set_bit(I915_VMA_GGTT_WRITE_BIT, __i915_vma_flags(vma));
  77 }
  78
  79 static inline bool i915_vma_unset_ggtt_write(struct i915_vma *vma)
  80 {
  81         return test_and_clear_bit(I915_VMA_GGTT_WRITE_BIT,
  82                                   __i915_vma_flags(vma));
  83 }
  84
  85 void i915_vma_flush_writes(struct i915_vma *vma);
  86
  87 static inline bool i915_vma_is_map_and_fenceable(const struct i915_vma *vma)
  88 {
  89         return test_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma));
  90 }
  91
  92 static inline bool i915_vma_set_userfault(struct i915_vma *vma)
  93 {
  94         GEM_BUG_ON(!i915_vma_is_map_and_fenceable(vma));
  95         return test_and_set_bit(I915_VMA_USERFAULT_BIT, __i915_vma_flags(vma));
  96 }
  97
  98 static inline void i915_vma_unset_userfault(struct i915_vma *vma)
  99 {
 100         return clear_bit(I915_VMA_USERFAULT_BIT, __i915_vma_flags(vma));
 101 }
 102
 103 static inline bool i915_vma_has_userfault(const struct i915_vma *vma)
 104 {
 105         return test_bit(I915_VMA_USERFAULT_BIT, __i915_vma_flags(vma));
 106 }
 107
 108 static inline bool i915_vma_is_closed(const struct i915_vma *vma)
 109 {
 110         return !list_empty(&vma->closed_link);
 111 }
 112
 113 static inline u32 i915_ggtt_offset(const struct i915_vma *vma)
 114 {
 115         GEM_BUG_ON(!i915_vma_is_ggtt(vma));
 116         GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
 117         GEM_BUG_ON(upper_32_bits(vma->node.start));
 118         GEM_BUG_ON(upper_32_bits(vma->node.start + vma->node.size - 1));
 119         return lower_32_bits(vma->node.start);
 120 }
 121
 122 static inline u32 i915_ggtt_pin_bias(struct i915_vma *vma)
 123 {
 124         return i915_vm_to_ggtt(vma->vm)->pin_bias;
 125 }
 126
 127 static inline struct i915_vma *i915_vma_get(struct i915_vma *vma)
 128 {
 129         i915_gem_object_get(vma->obj);
 130         return vma;
 131 }
 132
 133 static inline struct i915_vma *i915_vma_tryget(struct i915_vma *vma)
 134 {
 135         if (likely(kref_get_unless_zero(&vma->obj->base.refcount)))
 136                 return vma;
 137
 138         return NULL;
 139 }
 140
 141 static inline void i915_vma_put(struct i915_vma *vma)
 142 {
 143         i915_gem_object_put(vma->obj);
 144 }
 145
 146 static __always_inline ptrdiff_t ptrdiff(const void *a, const void *b)
 147 {
 148         return a - b;
 149 }
 150
 151 static inline long
 152 i915_vma_compare(struct i915_vma *vma,
 153                  struct i915_address_space *vm,
 154                  const struct i915_ggtt_view *view)
 155 {
 156         ptrdiff_t cmp;
 157
 158         GEM_BUG_ON(view && !i915_is_ggtt(vm));
 159
 160         cmp = ptrdiff(vma->vm, vm);
 161         if (cmp)
 162                 return cmp;
 163
 164         BUILD_BUG_ON(I915_GGTT_VIEW_NORMAL != 0);
 165         cmp = vma->ggtt_view.type;
 166         if (!view)
 167                 return cmp;
 168
 169         cmp -= view->type;
 170         if (cmp)
 171                 return cmp;
 172
 173         assert_i915_gem_gtt_types();
 174
 175         /* ggtt_view.type also encodes its size so that we both distinguish
 176          * different views using it as a "type" and also use a compact (no
 177          * accessing of uninitialised padding bytes) memcmp without storing
 178          * an extra parameter or adding more code.
 179          *
 180          * To ensure that the memcmp is valid for all branches of the union,
 181          * even though the code looks like it is just comparing one branch,
 182          * we assert above that all branches have the same address, and that
 183          * each branch has a unique type/size.
 184          */
 185         BUILD_BUG_ON(I915_GGTT_VIEW_NORMAL >= I915_GGTT_VIEW_PARTIAL);
 186         BUILD_BUG_ON(I915_GGTT_VIEW_PARTIAL >= I915_GGTT_VIEW_ROTATED);
 187         BUILD_BUG_ON(I915_GGTT_VIEW_ROTATED >= I915_GGTT_VIEW_REMAPPED);
 188         BUILD_BUG_ON(offsetof(typeof(*view), rotated) !=
 189                      offsetof(typeof(*view), partial));
 190         BUILD_BUG_ON(offsetof(typeof(*view), rotated) !=
 191                      offsetof(typeof(*view), remapped));
 192         return memcmp(&vma->ggtt_view.partial, &view->partial, view->type);
 193 }
 194
 195 struct i915_vma_work *i915_vma_work(void);
 196 int i915_vma_bind(struct i915_vma *vma,
 197                   enum i915_cache_level cache_level,
 198                   u32 flags,
 199                   struct i915_vma_work *work);
 200
 201 bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long color);
 202 bool i915_vma_misplaced(const struct i915_vma *vma,
 203                         u64 size, u64 alignment, u64 flags);
 204 void __i915_vma_set_map_and_fenceable(struct i915_vma *vma);
 205 void i915_vma_revoke_mmap(struct i915_vma *vma);
 206 int __i915_vma_unbind(struct i915_vma *vma);
 207 int __must_check i915_vma_unbind(struct i915_vma *vma);
 208 void i915_vma_unlink_ctx(struct i915_vma *vma);
 209 void i915_vma_close(struct i915_vma *vma);
 210 void i915_vma_reopen(struct i915_vma *vma);
 211
 212 static inline struct i915_vma *__i915_vma_get(struct i915_vma *vma)
 213 {
 214         if (kref_get_unless_zero(&vma->ref))
 215                 return vma;
 216
 217         return NULL;
 218 }
 219
 220 void i915_vma_release(struct kref *ref);
 221 static inline void __i915_vma_put(struct i915_vma *vma)
 222 {
 223         kref_put(&vma->ref, i915_vma_release);
 224 }
 225
 226 #define assert_vma_held(vma) dma_resv_assert_held((vma)->resv)
 227
 228 static inline void i915_vma_lock(struct i915_vma *vma)
 229 {
 230         dma_resv_lock(vma->resv, NULL);
 231 }
 232
 233 static inline void i915_vma_unlock(struct i915_vma *vma)
 234 {
 235         dma_resv_unlock(vma->resv);
 236 }
 237
 238 int __must_check
 239 i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags);
 240 int i915_ggtt_pin(struct i915_vma *vma, u32 align, unsigned int flags);
 241
 242 static inline int i915_vma_pin_count(const struct i915_vma *vma)
 243 {
 244         return atomic_read(&vma->flags) & I915_VMA_PIN_MASK;
 245 }
 246
 247 static inline bool i915_vma_is_pinned(const struct i915_vma *vma)
 248 {
 249         return i915_vma_pin_count(vma);
 250 }
 251
 252 static inline void __i915_vma_pin(struct i915_vma *vma)
 253 {
 254         atomic_inc(&vma->flags);
 255         GEM_BUG_ON(!i915_vma_is_pinned(vma));
 256 }
 257
 258 static inline void __i915_vma_unpin(struct i915_vma *vma)
 259 {
 260         GEM_BUG_ON(!i915_vma_is_pinned(vma));
 261         atomic_dec(&vma->flags);
 262 }
 263
 264 static inline void i915_vma_unpin(struct i915_vma *vma)
 265 {
 266         GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
 267         __i915_vma_unpin(vma);
 268 }
 269
 270 static inline bool i915_vma_is_bound(const struct i915_vma *vma,
 271                                      unsigned int where)
 272 {
 273         return atomic_read(&vma->flags) & where;
 274 }
 275
 276 static inline bool i915_node_color_differs(const struct drm_mm_node *node,
 277                                            unsigned long color)
 278 {
 279         return drm_mm_node_allocated(node) && node->color != color;
 280 }
 281
 282 /**
 283  * i915_vma_pin_iomap - calls ioremap_wc to map the GGTT VMA via the aperture
 284  * @vma: VMA to iomap
 285  *
 286  * The passed in VMA has to be pinned in the global GTT mappable region.
 287  * An extra pinning of the VMA is acquired for the return iomapping,
 288  * the caller must call i915_vma_unpin_iomap to relinquish the pinning
 289  * after the iomapping is no longer required.
 290  *
 291  * Returns a valid iomapped pointer or ERR_PTR.
 292  */
 293 void __iomem *i915_vma_pin_iomap(struct i915_vma *vma);
 294 #define IO_ERR_PTR(x) ((void __iomem *)ERR_PTR(x))
 295
 296 /**
 297  * i915_vma_unpin_iomap - unpins the mapping returned from i915_vma_iomap
 298  * @vma: VMA to unpin
 299  *
 300  * Unpins the previously iomapped VMA from i915_vma_pin_iomap().
 301  *
 302  * This function is only valid to be called on a VMA previously
 303  * iomapped by the caller with i915_vma_pin_iomap().
 304  */
 305 void i915_vma_unpin_iomap(struct i915_vma *vma);
 306
 307 static inline struct page *i915_vma_first_page(struct i915_vma *vma)
 308 {
 309         GEM_BUG_ON(!vma->pages);
 310         return sg_page(vma->pages->sgl);
 311 }
 312
 313 /**
 314  * i915_vma_pin_fence - pin fencing state
 315  * @vma: vma to pin fencing for
 316  *
 317  * This pins the fencing state (whether tiled or untiled) to make sure the
 318  * vma (and its object) is ready to be used as a scanout target. Fencing
 319  * status must be synchronize first by calling i915_vma_get_fence():
 320  *
 321  * The resulting fence pin reference must be released again with
 322  * i915_vma_unpin_fence().
 323  *
 324  * Returns:
 325  *
 326  * True if the vma has a fence, false otherwise.
 327  */
 328 int __must_check i915_vma_pin_fence(struct i915_vma *vma);
 329 int __must_check i915_vma_revoke_fence(struct i915_vma *vma);
 330
 331 int __i915_vma_pin_fence(struct i915_vma *vma);
 332
 333 static inline void __i915_vma_unpin_fence(struct i915_vma *vma)
 334 {
 335         GEM_BUG_ON(atomic_read(&vma->fence->pin_count) <= 0);
 336         atomic_dec(&vma->fence->pin_count);
 337 }
 338
 339 /**
 340  * i915_vma_unpin_fence - unpin fencing state
 341  * @vma: vma to unpin fencing for
 342  *
 343  * This releases the fence pin reference acquired through
 344  * i915_vma_pin_fence. It will handle both objects with and without an
 345  * attached fence correctly, callers do not need to distinguish this.
 346  */
 347 static inline void
 348 i915_vma_unpin_fence(struct i915_vma *vma)
 349 {
 350         if (vma->fence)
 351                 __i915_vma_unpin_fence(vma);
 352 }
 353
 354 void i915_vma_parked(struct intel_gt *gt);
 355
 356 #define for_each_until(cond) if (cond) break; else
 357
 358 /**
 359  * for_each_ggtt_vma - Iterate over the GGTT VMA belonging to an object.
 360  * @V: the #i915_vma iterator
 361  * @OBJ: the #drm_i915_gem_object
 362  *
 363  * GGTT VMA are placed at the being of the object's vma_list, see
 364  * vma_create(), so we can stop our walk as soon as we see a ppgtt VMA,
 365  * or the list is empty ofc.
 366  */
 367 #define for_each_ggtt_vma(V, OBJ) \
 368         list_for_each_entry(V, &(OBJ)->vma.list, obj_link)              \
 369                 for_each_until(!i915_vma_is_ggtt(V))
 370
 371 struct i915_vma *i915_vma_alloc(void);
 372 void i915_vma_free(struct i915_vma *vma);
 373
 374 struct i915_vma *i915_vma_make_unshrinkable(struct i915_vma *vma);
 375 void i915_vma_make_shrinkable(struct i915_vma *vma);
 376 void i915_vma_make_purgeable(struct i915_vma *vma);
 377
 378 static inline int i915_vma_sync(struct i915_vma *vma)
 379 {
 380         /* Wait for the asynchronous bindings and pending GPU reads */
 381         return i915_active_wait(&vma->active);
 382 }
 383
 384 #endif