1 /* SPDX-License-Identifier: MIT */
2 /*
3 * Copyright © 2020 Intel Corporation
4 *
5 * Please try to maintain the following order within this file unless it makes
6 * sense to do otherwise. From top to bottom:
7 * 1. typedefs
8 * 2. #defines, and macros
9 * 3. structure definitions
10 * 4. function prototypes
11 *
12 * Within each section, please try to order by generation in ascending order,
13 * from top to bottom (ie. gen6 on the top, gen8 on the bottom).
14 */
15
16 #ifndef __INTEL_GTT_H__
17 #define __INTEL_GTT_H__
18
19 #include <linux/io-mapping.h>
20 #include <linux/kref.h>
21 #include <linux/mm.h>
22 #include <linux/pagevec.h>
23 #include <linux/scatterlist.h>
24 #include <linux/workqueue.h>
25
26 #include <drm/drm_mm.h>
27
28 #include "gt/intel_reset.h"
29 #include "i915_selftest.h"
30 #include "i915_vma_types.h"
31
32 #define I915_GFP_ALLOW_FAIL (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)
33
34 #if IS_ENABLED(CONFIG_DRM_I915_TRACE_GTT)
35 #define DBG(...) trace_printk(__VA_ARGS__)
36 #else
37 #define DBG(...)
38 #endif
39
40 #define NALLOC 3 /* 1 normal, 1 for concurrent threads, 1 for preallocation */
41
42 #define I915_GTT_PAGE_SIZE_4K BIT_ULL(12)
43 #define I915_GTT_PAGE_SIZE_64K BIT_ULL(16)
44 #define I915_GTT_PAGE_SIZE_2M BIT_ULL(21)
45
46 #define I915_GTT_PAGE_SIZE I915_GTT_PAGE_SIZE_4K
47 #define I915_GTT_MAX_PAGE_SIZE I915_GTT_PAGE_SIZE_2M
48
49 #define I915_GTT_PAGE_MASK -I915_GTT_PAGE_SIZE
50
51 #define I915_GTT_MIN_ALIGNMENT I915_GTT_PAGE_SIZE
52
53 #define I915_FENCE_REG_NONE -1
54 #define I915_MAX_NUM_FENCES 32
55 /* 32 fences + sign bit for FENCE_REG_NONE */
56 #define I915_MAX_NUM_FENCE_BITS 6
57
58 typedef u32 gen6_pte_t;
59 typedef u64 gen8_pte_t;
60
61 #define ggtt_total_entries(ggtt) ((ggtt)->vm.total >> PAGE_SHIFT)
62
63 #define I915_PTES(pte_len) ((unsigned int)(PAGE_SIZE / (pte_len)))
64 #define I915_PTE_MASK(pte_len) (I915_PTES(pte_len) - 1)
65 #define I915_PDES 512
66 #define I915_PDE_MASK (I915_PDES - 1)
67
68 /* gen6-hsw has bit 11-4 for physical addr bit 39-32 */
69 #define GEN6_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0xff0))
70 #define GEN6_PTE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr)
71 #define GEN6_PDE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr)
72 #define GEN6_PTE_CACHE_LLC (2 << 1)
73 #define GEN6_PTE_UNCACHED (1 << 1)
74 #define GEN6_PTE_VALID REG_BIT(0)
75
76 #define GEN6_PTES I915_PTES(sizeof(gen6_pte_t))
77 #define GEN6_PD_SIZE (I915_PDES * PAGE_SIZE)
78 #define GEN6_PD_ALIGN (PAGE_SIZE * 16)
79 #define GEN6_PDE_SHIFT 22
80 #define GEN6_PDE_VALID REG_BIT(0)
81 #define NUM_PTE(pde_shift) (1 << (pde_shift - PAGE_SHIFT))
82
83 #define GEN7_PTE_CACHE_L3_LLC (3 << 1)
84
85 #define BYT_PTE_SNOOPED_BY_CPU_CACHES REG_BIT(2)
86 #define BYT_PTE_WRITEABLE REG_BIT(1)
87
88 #define GEN12_PPGTT_PTE_LM BIT_ULL(11)
89
90 #define GEN12_GGTT_PTE_LM BIT_ULL(1)
91
92 /*
93 * Cacheability Control is a 4-bit value. The low three bits are stored in bits
94 * 3:1 of the PTE, while the fourth bit is stored in bit 11 of the PTE.
95 */
96 #define HSW_CACHEABILITY_CONTROL(bits) ((((bits) & 0x7) << 1) | \
97 (((bits) & 0x8) << (11 - 3)))
98 #define HSW_WB_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x2)
99 #define HSW_WB_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x3)
100 #define HSW_WB_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x8)
101 #define HSW_WB_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0xb)
102 #define HSW_WT_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x7)
103 #define HSW_WT_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x6)
104 #define HSW_PTE_UNCACHED (0)
105 #define HSW_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0x7f0))
106 #define HSW_PTE_ADDR_ENCODE(addr) HSW_GTT_ADDR_ENCODE(addr)
107
108 /*
109 * GEN8 32b style address is defined as a 3 level page table:
110 * 31:30 | 29:21 | 20:12 | 11:0
111 * PDPE | PDE | PTE | offset
112 * The difference as compared to normal x86 3 level page table is the PDPEs are
113 * programmed via register.
114 *
115 * GEN8 48b style address is defined as a 4 level page table:
116 * 47:39 | 38:30 | 29:21 | 20:12 | 11:0
117 * PML4E | PDPE | PDE | PTE | offset
118 */
119 #define GEN8_3LVL_PDPES 4
120
121 #define PPAT_UNCACHED (_PAGE_PWT | _PAGE_PCD)
122 #define PPAT_CACHED_PDE 0 /* WB LLC */
123 #define PPAT_CACHED _PAGE_PAT /* WB LLCeLLC */
124 #define PPAT_DISPLAY_ELLC _PAGE_PCD /* WT eLLC */
125
126 #define CHV_PPAT_SNOOP REG_BIT(6)
127 #define GEN8_PPAT_AGE(x) ((x)<<4)
128 #define GEN8_PPAT_LLCeLLC (3<<2)
129 #define GEN8_PPAT_LLCELLC (2<<2)
130 #define GEN8_PPAT_LLC (1<<2)
131 #define GEN8_PPAT_WB (3<<0)
132 #define GEN8_PPAT_WT (2<<0)
133 #define GEN8_PPAT_WC (1<<0)
134 #define GEN8_PPAT_UC (0<<0)
135 #define GEN8_PPAT_ELLC_OVERRIDE (0<<2)
136 #define GEN8_PPAT(i, x) ((u64)(x) << ((i) * 8))
137
138 #define GEN8_PDE_IPS_64K BIT(11)
139 #define GEN8_PDE_PS_2M BIT(7)
140
141 enum i915_cache_level;
142
143 struct drm_i915_gem_object;
144 struct i915_fence_reg;
145 struct i915_vma;
146 struct intel_gt;
147
148 #define for_each_sgt_daddr(__dp, __iter, __sgt) \
149 __for_each_sgt_daddr(__dp, __iter, __sgt, I915_GTT_PAGE_SIZE)
150
151 struct i915_page_table {
152 struct drm_i915_gem_object *base;
153 union {
154 atomic_t used;
155 struct i915_page_table *stash;
156 };
157 };
158
159 struct i915_page_directory {
160 struct i915_page_table pt;
161 spinlock_t lock;
162 void **entry;
163 };
164
165 #define __px_choose_expr(x, type, expr, other) \
166 __builtin_choose_expr( \
167 __builtin_types_compatible_p(typeof(x), type) || \
168 __builtin_types_compatible_p(typeof(x), const type), \
169 ({ type __x = (type)(x); expr; }), \
170 other)
171
172 #define px_base(px) \
173 __px_choose_expr(px, struct drm_i915_gem_object *, __x, \
174 __px_choose_expr(px, struct i915_page_table *, __x->base, \
175 __px_choose_expr(px, struct i915_page_directory *, __x->pt.base, \
176 (void)0)))
177
178 struct page *__px_page(struct drm_i915_gem_object *p);
179 dma_addr_t __px_dma(struct drm_i915_gem_object *p);
180 #define px_dma(px) (__px_dma(px_base(px)))
181
182 void *__px_vaddr(struct drm_i915_gem_object *p);
183 #define px_vaddr(px) (__px_vaddr(px_base(px)))
184
185 #define px_pt(px) \
186 __px_choose_expr(px, struct i915_page_table *, __x, \
187 __px_choose_expr(px, struct i915_page_directory *, &__x->pt, \
188 (void)0))
189 #define px_used(px) (&px_pt(px)->used)
190
191 struct i915_vm_pt_stash {
192 /* preallocated chains of page tables/directories */
193 struct i915_page_table *pt[2];
194 };
195
196 struct i915_vma_ops {
197 /* Map an object into an address space with the given cache flags. */
198 void (*bind_vma)(struct i915_address_space *vm,
199 struct i915_vm_pt_stash *stash,
200 struct i915_vma *vma,
201 enum i915_cache_level cache_level,
202 u32 flags);
203 /*
204 * Unmap an object from an address space. This usually consists of
205 * setting the valid PTE entries to a reserved scratch page.
206 */
207 void (*unbind_vma)(struct i915_address_space *vm,
208 struct i915_vma *vma);
209
210 int (*set_pages)(struct i915_vma *vma);
211 void (*clear_pages)(struct i915_vma *vma);
212 };
213
214 struct i915_address_space {
215 struct kref ref;
216 struct rcu_work rcu;
217
218 struct drm_mm mm;
219 struct intel_gt *gt;
220 struct drm_i915_private *i915;
221 struct device *dma;
222 u64 total; /* size addr space maps (ex. 2GB for ggtt) */
223 u64 reserved; /* size addr space reserved */
224
225 unsigned int bind_async_flags;
226
227 /*
228 * Each active user context has its own address space (in full-ppgtt).
229 * Since the vm may be shared between multiple contexts, we count how
230 * many contexts keep us "open". Once open hits zero, we are closed
231 * and do not allow any new attachments, and proceed to shutdown our
232 * vma and page directories.
233 */
234 atomic_t open;
235
236 struct mutex mutex; /* protects vma and our lists */
237
238 struct kref resv_ref; /* kref to keep the reservation lock alive. */
239 struct dma_resv _resv; /* reservation lock for all pd objects, and buffer pool */
240 #define VM_CLASS_GGTT 0
241 #define VM_CLASS_PPGTT 1
242 #define VM_CLASS_DPT 2
243
244 struct drm_i915_gem_object *scratch[4];
245 /**
246 * List of vma currently bound.
247 */
248 struct list_head bound_list;
249
250 /* Global GTT */
251 bool is_ggtt:1;
252
253 /* Display page table */
254 bool is_dpt:1;
255
256 /* Some systems support read-only mappings for GGTT and/or PPGTT */
257 bool has_read_only:1;
258
259 u8 top;
260 u8 pd_shift;
261 u8 scratch_order;
262
263 struct drm_i915_gem_object *
264 (*alloc_pt_dma)(struct i915_address_space *vm, int sz);
265
266 u64 (*pte_encode)(dma_addr_t addr,
267 enum i915_cache_level level,
268 u32 flags); /* Create a valid PTE */
269 #define PTE_READ_ONLY BIT(0)
270 #define PTE_LM BIT(1)
271
272 void (*allocate_va_range)(struct i915_address_space *vm,
273 struct i915_vm_pt_stash *stash,
274 u64 start, u64 length);
275 void (*clear_range)(struct i915_address_space *vm,
276 u64 start, u64 length);
277 void (*insert_page)(struct i915_address_space *vm,
278 dma_addr_t addr,
279 u64 offset,
280 enum i915_cache_level cache_level,
281 u32 flags);
282 void (*insert_entries)(struct i915_address_space *vm,
283 struct i915_vma *vma,
284 enum i915_cache_level cache_level,
285 u32 flags);
286 void (*cleanup)(struct i915_address_space *vm);
287
288 void (*foreach)(struct i915_address_space *vm,
289 u64 start, u64 length,
290 void (*fn)(struct i915_address_space *vm,
291 struct i915_page_table *pt,
292 void *data),
293 void *data);
294
295 struct i915_vma_ops vma_ops;
296
297 I915_SELFTEST_DECLARE(struct fault_attr fault_attr);
298 I915_SELFTEST_DECLARE(bool scrub_64K);
299 };
300
301 /*
302 * The Graphics Translation Table is the way in which GEN hardware translates a
303 * Graphics Virtual Address into a Physical Address. In addition to the normal
304 * collateral associated with any va->pa translations GEN hardware also has a
305 * portion of the GTT which can be mapped by the CPU and remain both coherent
306 * and correct (in cases like swizzling). That region is referred to as GMADR in
307 * the spec.
308 */
309 struct i915_ggtt {
310 struct i915_address_space vm;
311
312 struct io_mapping iomap; /* Mapping to our CPU mappable region */
313 struct resource gmadr; /* GMADR resource */
314 resource_size_t mappable_end; /* End offset that we can CPU map */
315
316 /** "Graphics Stolen Memory" holds the global PTEs */
317 void __iomem *gsm;
318 void (*invalidate)(struct i915_ggtt *ggtt);
319
320 /** PPGTT used for aliasing the PPGTT with the GTT */
321 struct i915_ppgtt *alias;
322
323 bool do_idle_maps;
324
325 int mtrr;
326
327 /** Bit 6 swizzling required for X tiling */
328 u32 bit_6_swizzle_x;
329 /** Bit 6 swizzling required for Y tiling */
330 u32 bit_6_swizzle_y;
331
332 u32 pin_bias;
333
334 unsigned int num_fences;
335 struct i915_fence_reg *fence_regs;
336 struct list_head fence_list;
337
338 /**
339 * List of all objects in gtt_space, currently mmaped by userspace.
340 * All objects within this list must also be on bound_list.
341 */
342 struct list_head userfault_list;
343
344 /* Manual runtime pm autosuspend delay for user GGTT mmaps */
345 struct intel_wakeref_auto userfault_wakeref;
346
347 struct mutex error_mutex;
348 struct drm_mm_node error_capture;
349 struct drm_mm_node uc_fw;
350 };
351
352 struct i915_ppgtt {
353 struct i915_address_space vm;
354
355 struct i915_page_directory *pd;
356 };
357
358 #define i915_is_ggtt(vm) ((vm)->is_ggtt)
359 #define i915_is_dpt(vm) ((vm)->is_dpt)
360 #define i915_is_ggtt_or_dpt(vm) (i915_is_ggtt(vm) || i915_is_dpt(vm))
361
362 int __must_check
363 i915_vm_lock_objects(struct i915_address_space *vm, struct i915_gem_ww_ctx *ww);
364
365 static inline bool
i915_vm_is_4lvl(const struct i915_address_space * vm)366 i915_vm_is_4lvl(const struct i915_address_space *vm)
367 {
368 return (vm->total - 1) >> 32;
369 }
370
371 static inline bool
i915_vm_has_scratch_64K(struct i915_address_space * vm)372 i915_vm_has_scratch_64K(struct i915_address_space *vm)
373 {
374 return vm->scratch_order == get_order(I915_GTT_PAGE_SIZE_64K);
375 }
376
377 static inline bool
i915_vm_has_cache_coloring(struct i915_address_space * vm)378 i915_vm_has_cache_coloring(struct i915_address_space *vm)
379 {
380 return i915_is_ggtt(vm) && vm->mm.color_adjust;
381 }
382
383 static inline struct i915_ggtt *
i915_vm_to_ggtt(struct i915_address_space * vm)384 i915_vm_to_ggtt(struct i915_address_space *vm)
385 {
386 BUILD_BUG_ON(offsetof(struct i915_ggtt, vm));
387 GEM_BUG_ON(!i915_is_ggtt(vm));
388 return container_of(vm, struct i915_ggtt, vm);
389 }
390
391 static inline struct i915_ppgtt *
i915_vm_to_ppgtt(struct i915_address_space * vm)392 i915_vm_to_ppgtt(struct i915_address_space *vm)
393 {
394 BUILD_BUG_ON(offsetof(struct i915_ppgtt, vm));
395 GEM_BUG_ON(i915_is_ggtt_or_dpt(vm));
396 return container_of(vm, struct i915_ppgtt, vm);
397 }
398
399 static inline struct i915_address_space *
i915_vm_get(struct i915_address_space * vm)400 i915_vm_get(struct i915_address_space *vm)
401 {
402 kref_get(&vm->ref);
403 return vm;
404 }
405
406 /**
407 * i915_vm_resv_get - Obtain a reference on the vm's reservation lock
408 * @vm: The vm whose reservation lock we want to share.
409 *
410 * Return: A pointer to the vm's reservation lock.
411 */
i915_vm_resv_get(struct i915_address_space * vm)412 static inline struct dma_resv *i915_vm_resv_get(struct i915_address_space *vm)
413 {
414 kref_get(&vm->resv_ref);
415 return &vm->_resv;
416 }
417
418 void i915_vm_release(struct kref *kref);
419
420 void i915_vm_resv_release(struct kref *kref);
421
i915_vm_put(struct i915_address_space * vm)422 static inline void i915_vm_put(struct i915_address_space *vm)
423 {
424 kref_put(&vm->ref, i915_vm_release);
425 }
426
427 /**
428 * i915_vm_resv_put - Release a reference on the vm's reservation lock
429 * @resv: Pointer to a reservation lock obtained from i915_vm_resv_get()
430 */
i915_vm_resv_put(struct i915_address_space * vm)431 static inline void i915_vm_resv_put(struct i915_address_space *vm)
432 {
433 kref_put(&vm->resv_ref, i915_vm_resv_release);
434 }
435
436 static inline struct i915_address_space *
i915_vm_open(struct i915_address_space * vm)437 i915_vm_open(struct i915_address_space *vm)
438 {
439 GEM_BUG_ON(!atomic_read(&vm->open));
440 atomic_inc(&vm->open);
441 return i915_vm_get(vm);
442 }
443
444 static inline bool
i915_vm_tryopen(struct i915_address_space * vm)445 i915_vm_tryopen(struct i915_address_space *vm)
446 {
447 if (atomic_add_unless(&vm->open, 1, 0))
448 return i915_vm_get(vm);
449
450 return false;
451 }
452
453 void __i915_vm_close(struct i915_address_space *vm);
454
455 static inline void
i915_vm_close(struct i915_address_space * vm)456 i915_vm_close(struct i915_address_space *vm)
457 {
458 GEM_BUG_ON(!atomic_read(&vm->open));
459 __i915_vm_close(vm);
460
461 i915_vm_put(vm);
462 }
463
464 void i915_address_space_init(struct i915_address_space *vm, int subclass);
465 void i915_address_space_fini(struct i915_address_space *vm);
466
i915_pte_index(u64 address,unsigned int pde_shift)467 static inline u32 i915_pte_index(u64 address, unsigned int pde_shift)
468 {
469 const u32 mask = NUM_PTE(pde_shift) - 1;
470
471 return (address >> PAGE_SHIFT) & mask;
472 }
473
474 /*
475 * Helper to counts the number of PTEs within the given length. This count
476 * does not cross a page table boundary, so the max value would be
477 * GEN6_PTES for GEN6, and GEN8_PTES for GEN8.
478 */
i915_pte_count(u64 addr,u64 length,unsigned int pde_shift)479 static inline u32 i915_pte_count(u64 addr, u64 length, unsigned int pde_shift)
480 {
481 const u64 mask = ~((1ULL << pde_shift) - 1);
482 u64 end;
483
484 GEM_BUG_ON(length == 0);
485 GEM_BUG_ON(offset_in_page(addr | length));
486
487 end = addr + length;
488
489 if ((addr & mask) != (end & mask))
490 return NUM_PTE(pde_shift) - i915_pte_index(addr, pde_shift);
491
492 return i915_pte_index(end, pde_shift) - i915_pte_index(addr, pde_shift);
493 }
494
i915_pde_index(u64 addr,u32 shift)495 static inline u32 i915_pde_index(u64 addr, u32 shift)
496 {
497 return (addr >> shift) & I915_PDE_MASK;
498 }
499
500 static inline struct i915_page_table *
i915_pt_entry(const struct i915_page_directory * const pd,const unsigned short n)501 i915_pt_entry(const struct i915_page_directory * const pd,
502 const unsigned short n)
503 {
504 return pd->entry[n];
505 }
506
507 static inline struct i915_page_directory *
i915_pd_entry(const struct i915_page_directory * const pdp,const unsigned short n)508 i915_pd_entry(const struct i915_page_directory * const pdp,
509 const unsigned short n)
510 {
511 return pdp->entry[n];
512 }
513
514 static inline dma_addr_t
i915_page_dir_dma_addr(const struct i915_ppgtt * ppgtt,const unsigned int n)515 i915_page_dir_dma_addr(const struct i915_ppgtt *ppgtt, const unsigned int n)
516 {
517 struct i915_page_table *pt = ppgtt->pd->entry[n];
518
519 return __px_dma(pt ? px_base(pt) : ppgtt->vm.scratch[ppgtt->vm.top]);
520 }
521
522 void ppgtt_init(struct i915_ppgtt *ppgtt, struct intel_gt *gt);
523
524 int i915_ggtt_probe_hw(struct drm_i915_private *i915);
525 int i915_ggtt_init_hw(struct drm_i915_private *i915);
526 int i915_ggtt_enable_hw(struct drm_i915_private *i915);
527 void i915_ggtt_enable_guc(struct i915_ggtt *ggtt);
528 void i915_ggtt_disable_guc(struct i915_ggtt *ggtt);
529 int i915_init_ggtt(struct drm_i915_private *i915);
530 void i915_ggtt_driver_release(struct drm_i915_private *i915);
531 void i915_ggtt_driver_late_release(struct drm_i915_private *i915);
532
i915_ggtt_has_aperture(const struct i915_ggtt * ggtt)533 static inline bool i915_ggtt_has_aperture(const struct i915_ggtt *ggtt)
534 {
535 return ggtt->mappable_end > 0;
536 }
537
538 int i915_ppgtt_init_hw(struct intel_gt *gt);
539
540 struct i915_ppgtt *i915_ppgtt_create(struct intel_gt *gt);
541
542 void i915_ggtt_suspend(struct i915_ggtt *gtt);
543 void i915_ggtt_resume(struct i915_ggtt *ggtt);
544
545 void
546 fill_page_dma(struct drm_i915_gem_object *p, const u64 val, unsigned int count);
547
548 #define fill_px(px, v) fill_page_dma(px_base(px), (v), PAGE_SIZE / sizeof(u64))
549 #define fill32_px(px, v) do { \
550 u64 v__ = lower_32_bits(v); \
551 fill_px((px), v__ << 32 | v__); \
552 } while (0)
553
554 int setup_scratch_page(struct i915_address_space *vm);
555 void free_scratch(struct i915_address_space *vm);
556
557 struct drm_i915_gem_object *alloc_pt_dma(struct i915_address_space *vm, int sz);
558 struct drm_i915_gem_object *alloc_pt_lmem(struct i915_address_space *vm, int sz);
559 struct i915_page_table *alloc_pt(struct i915_address_space *vm);
560 struct i915_page_directory *alloc_pd(struct i915_address_space *vm);
561 struct i915_page_directory *__alloc_pd(int npde);
562
563 int map_pt_dma(struct i915_address_space *vm, struct drm_i915_gem_object *obj);
564 int map_pt_dma_locked(struct i915_address_space *vm, struct drm_i915_gem_object *obj);
565
566 void free_px(struct i915_address_space *vm,
567 struct i915_page_table *pt, int lvl);
568 #define free_pt(vm, px) free_px(vm, px, 0)
569 #define free_pd(vm, px) free_px(vm, px_pt(px), 1)
570
571 void
572 __set_pd_entry(struct i915_page_directory * const pd,
573 const unsigned short idx,
574 struct i915_page_table *pt,
575 u64 (*encode)(const dma_addr_t, const enum i915_cache_level));
576
577 #define set_pd_entry(pd, idx, to) \
578 __set_pd_entry((pd), (idx), px_pt(to), gen8_pde_encode)
579
580 void
581 clear_pd_entry(struct i915_page_directory * const pd,
582 const unsigned short idx,
583 const struct drm_i915_gem_object * const scratch);
584
585 bool
586 release_pd_entry(struct i915_page_directory * const pd,
587 const unsigned short idx,
588 struct i915_page_table * const pt,
589 const struct drm_i915_gem_object * const scratch);
590 void gen6_ggtt_invalidate(struct i915_ggtt *ggtt);
591
592 int ggtt_set_pages(struct i915_vma *vma);
593 int ppgtt_set_pages(struct i915_vma *vma);
594 void clear_pages(struct i915_vma *vma);
595
596 void ppgtt_bind_vma(struct i915_address_space *vm,
597 struct i915_vm_pt_stash *stash,
598 struct i915_vma *vma,
599 enum i915_cache_level cache_level,
600 u32 flags);
601 void ppgtt_unbind_vma(struct i915_address_space *vm,
602 struct i915_vma *vma);
603
604 void gtt_write_workarounds(struct intel_gt *gt);
605
606 void setup_private_pat(struct intel_uncore *uncore);
607
608 int i915_vm_alloc_pt_stash(struct i915_address_space *vm,
609 struct i915_vm_pt_stash *stash,
610 u64 size);
611 int i915_vm_map_pt_stash(struct i915_address_space *vm,
612 struct i915_vm_pt_stash *stash);
613 void i915_vm_free_pt_stash(struct i915_address_space *vm,
614 struct i915_vm_pt_stash *stash);
615
616 struct i915_vma *
617 __vm_create_scratch_for_read(struct i915_address_space *vm, unsigned long size);
618
619 struct i915_vma *
620 __vm_create_scratch_for_read_pinned(struct i915_address_space *vm, unsigned long size);
621
622 static inline struct sgt_dma {
623 struct scatterlist *sg;
624 dma_addr_t dma, max;
sgt_dma(struct i915_vma * vma)625 } sgt_dma(struct i915_vma *vma) {
626 struct scatterlist *sg = vma->pages->sgl;
627 dma_addr_t addr = sg_dma_address(sg);
628
629 return (struct sgt_dma){ sg, addr, addr + sg_dma_len(sg) };
630 }
631
632 #endif
633
