1 // SPDX-License-Identifier: MIT
3 * Copyright © 2020 Intel Corporation
6 #include <linux/stop_machine.h>
8 #include <asm/set_memory.h>
11 #include <drm/i915_drm.h>
15 #include "i915_scatterlist.h"
16 #include "i915_vgpu.h"
18 #include "intel_gtt.h"
21 i915_get_ggtt_vma_pages(struct i915_vma
*vma
);
23 static void i915_ggtt_color_adjust(const struct drm_mm_node
*node
,
28 if (i915_node_color_differs(node
, color
))
29 *start
+= I915_GTT_PAGE_SIZE
;
32 * Also leave a space between the unallocated reserved node after the
33 * GTT and any objects within the GTT, i.e. we use the color adjustment
34 * to insert a guard page to prevent prefetches crossing over the
37 node
= list_next_entry(node
, node_list
);
38 if (node
->color
!= color
)
39 *end
-= I915_GTT_PAGE_SIZE
;
42 static int ggtt_init_hw(struct i915_ggtt
*ggtt
)
44 struct drm_i915_private
*i915
= ggtt
->vm
.i915
;
46 i915_address_space_init(&ggtt
->vm
, VM_CLASS_GGTT
);
48 ggtt
->vm
.is_ggtt
= true;
50 /* Only VLV supports read-only GGTT mappings */
51 ggtt
->vm
.has_read_only
= IS_VALLEYVIEW(i915
);
53 if (!HAS_LLC(i915
) && !HAS_PPGTT(i915
))
54 ggtt
->vm
.mm
.color_adjust
= i915_ggtt_color_adjust
;
56 if (ggtt
->mappable_end
) {
57 if (!io_mapping_init_wc(&ggtt
->iomap
,
59 ggtt
->mappable_end
)) {
60 ggtt
->vm
.cleanup(&ggtt
->vm
);
64 ggtt
->mtrr
= arch_phys_wc_add(ggtt
->gmadr
.start
,
68 intel_ggtt_init_fences(ggtt
);
74 * i915_ggtt_init_hw - Initialize GGTT hardware
77 int i915_ggtt_init_hw(struct drm_i915_private
*i915
)
82 * Note that we use page colouring to enforce a guard page at the
83 * end of the address space. This is required as the CS may prefetch
84 * beyond the end of the batch buffer, across the page boundary,
85 * and beyond the end of the GTT if we do not provide a guard.
87 ret
= ggtt_init_hw(&i915
->ggtt
);
95 * Certain Gen5 chipsets require require idling the GPU before
96 * unmapping anything from the GTT when VT-d is enabled.
98 static bool needs_idle_maps(struct drm_i915_private
*i915
)
101 * Query intel_iommu to see if we need the workaround. Presumably that
104 return IS_GEN(i915
, 5) && IS_MOBILE(i915
) && intel_vtd_active();
107 void i915_ggtt_suspend(struct i915_ggtt
*ggtt
)
109 struct i915_vma
*vma
, *vn
;
112 mutex_lock(&ggtt
->vm
.mutex
);
114 /* Skip rewriting PTE on VMA unbind. */
115 open
= atomic_xchg(&ggtt
->vm
.open
, 0);
117 list_for_each_entry_safe(vma
, vn
, &ggtt
->vm
.bound_list
, vm_link
) {
118 GEM_BUG_ON(!drm_mm_node_allocated(&vma
->node
));
119 i915_vma_wait_for_bind(vma
);
121 if (i915_vma_is_pinned(vma
))
124 if (!i915_vma_is_bound(vma
, I915_VMA_GLOBAL_BIND
)) {
125 __i915_vma_evict(vma
);
126 drm_mm_remove_node(&vma
->node
);
130 ggtt
->vm
.clear_range(&ggtt
->vm
, 0, ggtt
->vm
.total
);
131 ggtt
->invalidate(ggtt
);
132 atomic_set(&ggtt
->vm
.open
, open
);
134 mutex_unlock(&ggtt
->vm
.mutex
);
136 intel_gt_check_and_clear_faults(ggtt
->vm
.gt
);
139 void gen6_ggtt_invalidate(struct i915_ggtt
*ggtt
)
141 struct intel_uncore
*uncore
= ggtt
->vm
.gt
->uncore
;
143 spin_lock_irq(&uncore
->lock
);
144 intel_uncore_write_fw(uncore
, GFX_FLSH_CNTL_GEN6
, GFX_FLSH_CNTL_EN
);
145 intel_uncore_read_fw(uncore
, GFX_FLSH_CNTL_GEN6
);
146 spin_unlock_irq(&uncore
->lock
);
149 static void gen8_ggtt_invalidate(struct i915_ggtt
*ggtt
)
151 struct intel_uncore
*uncore
= ggtt
->vm
.gt
->uncore
;
154 * Note that as an uncached mmio write, this will flush the
155 * WCB of the writes into the GGTT before it triggers the invalidate.
157 intel_uncore_write_fw(uncore
, GFX_FLSH_CNTL_GEN6
, GFX_FLSH_CNTL_EN
);
160 static void guc_ggtt_invalidate(struct i915_ggtt
*ggtt
)
162 struct intel_uncore
*uncore
= ggtt
->vm
.gt
->uncore
;
163 struct drm_i915_private
*i915
= ggtt
->vm
.i915
;
165 gen8_ggtt_invalidate(ggtt
);
167 if (INTEL_GEN(i915
) >= 12)
168 intel_uncore_write_fw(uncore
, GEN12_GUC_TLB_INV_CR
,
169 GEN12_GUC_TLB_INV_CR_INVALIDATE
);
171 intel_uncore_write_fw(uncore
, GEN8_GTCR
, GEN8_GTCR_INVALIDATE
);
174 static void gmch_ggtt_invalidate(struct i915_ggtt
*ggtt
)
176 intel_gtt_chipset_flush();
179 static u64
gen8_ggtt_pte_encode(dma_addr_t addr
,
180 enum i915_cache_level level
,
183 return addr
| _PAGE_PRESENT
;
186 static void gen8_set_pte(void __iomem
*addr
, gen8_pte_t pte
)
191 static void gen8_ggtt_insert_page(struct i915_address_space
*vm
,
194 enum i915_cache_level level
,
197 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
198 gen8_pte_t __iomem
*pte
=
199 (gen8_pte_t __iomem
*)ggtt
->gsm
+ offset
/ I915_GTT_PAGE_SIZE
;
201 gen8_set_pte(pte
, gen8_ggtt_pte_encode(addr
, level
, 0));
203 ggtt
->invalidate(ggtt
);
206 static void gen8_ggtt_insert_entries(struct i915_address_space
*vm
,
207 struct i915_vma
*vma
,
208 enum i915_cache_level level
,
211 const gen8_pte_t pte_encode
= gen8_ggtt_pte_encode(0, level
, 0);
212 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
213 gen8_pte_t __iomem
*gte
;
214 gen8_pte_t __iomem
*end
;
215 struct sgt_iter iter
;
219 * Note that we ignore PTE_READ_ONLY here. The caller must be careful
220 * not to allow the user to override access to a read only page.
223 gte
= (gen8_pte_t __iomem
*)ggtt
->gsm
;
224 gte
+= vma
->node
.start
/ I915_GTT_PAGE_SIZE
;
225 end
= gte
+ vma
->node
.size
/ I915_GTT_PAGE_SIZE
;
227 for_each_sgt_daddr(addr
, iter
, vma
->pages
)
228 gen8_set_pte(gte
++, pte_encode
| addr
);
229 GEM_BUG_ON(gte
> end
);
231 /* Fill the allocated but "unused" space beyond the end of the buffer */
233 gen8_set_pte(gte
++, vm
->scratch
[0]->encode
);
236 * We want to flush the TLBs only after we're certain all the PTE
237 * updates have finished.
239 ggtt
->invalidate(ggtt
);
242 static void gen6_ggtt_insert_page(struct i915_address_space
*vm
,
245 enum i915_cache_level level
,
248 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
249 gen6_pte_t __iomem
*pte
=
250 (gen6_pte_t __iomem
*)ggtt
->gsm
+ offset
/ I915_GTT_PAGE_SIZE
;
252 iowrite32(vm
->pte_encode(addr
, level
, flags
), pte
);
254 ggtt
->invalidate(ggtt
);
258 * Binds an object into the global gtt with the specified cache level.
259 * The object will be accessible to the GPU via commands whose operands
260 * reference offsets within the global GTT as well as accessible by the GPU
261 * through the GMADR mapped BAR (i915->mm.gtt->gtt).
263 static void gen6_ggtt_insert_entries(struct i915_address_space
*vm
,
264 struct i915_vma
*vma
,
265 enum i915_cache_level level
,
268 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
269 gen6_pte_t __iomem
*gte
;
270 gen6_pte_t __iomem
*end
;
271 struct sgt_iter iter
;
274 gte
= (gen6_pte_t __iomem
*)ggtt
->gsm
;
275 gte
+= vma
->node
.start
/ I915_GTT_PAGE_SIZE
;
276 end
= gte
+ vma
->node
.size
/ I915_GTT_PAGE_SIZE
;
278 for_each_sgt_daddr(addr
, iter
, vma
->pages
)
279 iowrite32(vm
->pte_encode(addr
, level
, flags
), gte
++);
280 GEM_BUG_ON(gte
> end
);
282 /* Fill the allocated but "unused" space beyond the end of the buffer */
284 iowrite32(vm
->scratch
[0]->encode
, gte
++);
287 * We want to flush the TLBs only after we're certain all the PTE
288 * updates have finished.
290 ggtt
->invalidate(ggtt
);
293 static void nop_clear_range(struct i915_address_space
*vm
,
294 u64 start
, u64 length
)
298 static void gen8_ggtt_clear_range(struct i915_address_space
*vm
,
299 u64 start
, u64 length
)
301 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
302 unsigned int first_entry
= start
/ I915_GTT_PAGE_SIZE
;
303 unsigned int num_entries
= length
/ I915_GTT_PAGE_SIZE
;
304 const gen8_pte_t scratch_pte
= vm
->scratch
[0]->encode
;
305 gen8_pte_t __iomem
*gtt_base
=
306 (gen8_pte_t __iomem
*)ggtt
->gsm
+ first_entry
;
307 const int max_entries
= ggtt_total_entries(ggtt
) - first_entry
;
310 if (WARN(num_entries
> max_entries
,
311 "First entry = %d; Num entries = %d (max=%d)\n",
312 first_entry
, num_entries
, max_entries
))
313 num_entries
= max_entries
;
315 for (i
= 0; i
< num_entries
; i
++)
316 gen8_set_pte(>t_base
[i
], scratch_pte
);
319 static void bxt_vtd_ggtt_wa(struct i915_address_space
*vm
)
322 * Make sure the internal GAM fifo has been cleared of all GTT
323 * writes before exiting stop_machine(). This guarantees that
324 * any aperture accesses waiting to start in another process
325 * cannot back up behind the GTT writes causing a hang.
326 * The register can be any arbitrary GAM register.
328 intel_uncore_posting_read_fw(vm
->gt
->uncore
, GFX_FLSH_CNTL_GEN6
);
332 struct i915_address_space
*vm
;
335 enum i915_cache_level level
;
338 static int bxt_vtd_ggtt_insert_page__cb(void *_arg
)
340 struct insert_page
*arg
= _arg
;
342 gen8_ggtt_insert_page(arg
->vm
, arg
->addr
, arg
->offset
, arg
->level
, 0);
343 bxt_vtd_ggtt_wa(arg
->vm
);
348 static void bxt_vtd_ggtt_insert_page__BKL(struct i915_address_space
*vm
,
351 enum i915_cache_level level
,
354 struct insert_page arg
= { vm
, addr
, offset
, level
};
356 stop_machine(bxt_vtd_ggtt_insert_page__cb
, &arg
, NULL
);
359 struct insert_entries
{
360 struct i915_address_space
*vm
;
361 struct i915_vma
*vma
;
362 enum i915_cache_level level
;
366 static int bxt_vtd_ggtt_insert_entries__cb(void *_arg
)
368 struct insert_entries
*arg
= _arg
;
370 gen8_ggtt_insert_entries(arg
->vm
, arg
->vma
, arg
->level
, arg
->flags
);
371 bxt_vtd_ggtt_wa(arg
->vm
);
376 static void bxt_vtd_ggtt_insert_entries__BKL(struct i915_address_space
*vm
,
377 struct i915_vma
*vma
,
378 enum i915_cache_level level
,
381 struct insert_entries arg
= { vm
, vma
, level
, flags
};
383 stop_machine(bxt_vtd_ggtt_insert_entries__cb
, &arg
, NULL
);
386 static void gen6_ggtt_clear_range(struct i915_address_space
*vm
,
387 u64 start
, u64 length
)
389 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
390 unsigned int first_entry
= start
/ I915_GTT_PAGE_SIZE
;
391 unsigned int num_entries
= length
/ I915_GTT_PAGE_SIZE
;
392 gen6_pte_t scratch_pte
, __iomem
*gtt_base
=
393 (gen6_pte_t __iomem
*)ggtt
->gsm
+ first_entry
;
394 const int max_entries
= ggtt_total_entries(ggtt
) - first_entry
;
397 if (WARN(num_entries
> max_entries
,
398 "First entry = %d; Num entries = %d (max=%d)\n",
399 first_entry
, num_entries
, max_entries
))
400 num_entries
= max_entries
;
402 scratch_pte
= vm
->scratch
[0]->encode
;
403 for (i
= 0; i
< num_entries
; i
++)
404 iowrite32(scratch_pte
, >t_base
[i
]);
407 static void i915_ggtt_insert_page(struct i915_address_space
*vm
,
410 enum i915_cache_level cache_level
,
413 unsigned int flags
= (cache_level
== I915_CACHE_NONE
) ?
414 AGP_USER_MEMORY
: AGP_USER_CACHED_MEMORY
;
416 intel_gtt_insert_page(addr
, offset
>> PAGE_SHIFT
, flags
);
419 static void i915_ggtt_insert_entries(struct i915_address_space
*vm
,
420 struct i915_vma
*vma
,
421 enum i915_cache_level cache_level
,
424 unsigned int flags
= (cache_level
== I915_CACHE_NONE
) ?
425 AGP_USER_MEMORY
: AGP_USER_CACHED_MEMORY
;
427 intel_gtt_insert_sg_entries(vma
->pages
, vma
->node
.start
>> PAGE_SHIFT
,
431 static void i915_ggtt_clear_range(struct i915_address_space
*vm
,
432 u64 start
, u64 length
)
434 intel_gtt_clear_range(start
>> PAGE_SHIFT
, length
>> PAGE_SHIFT
);
437 static void ggtt_bind_vma(struct i915_address_space
*vm
,
438 struct i915_vm_pt_stash
*stash
,
439 struct i915_vma
*vma
,
440 enum i915_cache_level cache_level
,
443 struct drm_i915_gem_object
*obj
= vma
->obj
;
446 if (i915_vma_is_bound(vma
, ~flags
& I915_VMA_BIND_MASK
))
449 /* Applicable to VLV (gen8+ do not support RO in the GGTT) */
451 if (i915_gem_object_is_readonly(obj
))
452 pte_flags
|= PTE_READ_ONLY
;
454 vm
->insert_entries(vm
, vma
, cache_level
, pte_flags
);
455 vma
->page_sizes
.gtt
= I915_GTT_PAGE_SIZE
;
458 static void ggtt_unbind_vma(struct i915_address_space
*vm
, struct i915_vma
*vma
)
460 vm
->clear_range(vm
, vma
->node
.start
, vma
->size
);
463 static int ggtt_reserve_guc_top(struct i915_ggtt
*ggtt
)
468 if (!intel_uc_uses_guc(&ggtt
->vm
.gt
->uc
))
471 GEM_BUG_ON(ggtt
->vm
.total
<= GUC_GGTT_TOP
);
472 size
= ggtt
->vm
.total
- GUC_GGTT_TOP
;
474 ret
= i915_gem_gtt_reserve(&ggtt
->vm
, &ggtt
->uc_fw
, size
,
475 GUC_GGTT_TOP
, I915_COLOR_UNEVICTABLE
,
478 drm_dbg(&ggtt
->vm
.i915
->drm
,
479 "Failed to reserve top of GGTT for GuC\n");
484 static void ggtt_release_guc_top(struct i915_ggtt
*ggtt
)
486 if (drm_mm_node_allocated(&ggtt
->uc_fw
))
487 drm_mm_remove_node(&ggtt
->uc_fw
);
490 static void cleanup_init_ggtt(struct i915_ggtt
*ggtt
)
492 ggtt_release_guc_top(ggtt
);
493 if (drm_mm_node_allocated(&ggtt
->error_capture
))
494 drm_mm_remove_node(&ggtt
->error_capture
);
495 mutex_destroy(&ggtt
->error_mutex
);
498 static int init_ggtt(struct i915_ggtt
*ggtt
)
501 * Let GEM Manage all of the aperture.
503 * However, leave one page at the end still bound to the scratch page.
504 * There are a number of places where the hardware apparently prefetches
505 * past the end of the object, and we've seen multiple hangs with the
506 * GPU head pointer stuck in a batchbuffer bound at the last page of the
507 * aperture. One page should be enough to keep any prefetching inside
510 unsigned long hole_start
, hole_end
;
511 struct drm_mm_node
*entry
;
515 * GuC requires all resources that we're sharing with it to be placed in
516 * non-WOPCM memory. If GuC is not present or not in use we still need a
517 * small bias as ring wraparound at offset 0 sometimes hangs. No idea
520 ggtt
->pin_bias
= max_t(u32
, I915_GTT_PAGE_SIZE
,
521 intel_wopcm_guc_size(&ggtt
->vm
.i915
->wopcm
));
523 ret
= intel_vgt_balloon(ggtt
);
527 mutex_init(&ggtt
->error_mutex
);
528 if (ggtt
->mappable_end
) {
529 /* Reserve a mappable slot for our lockless error capture */
530 ret
= drm_mm_insert_node_in_range(&ggtt
->vm
.mm
,
531 &ggtt
->error_capture
,
533 I915_COLOR_UNEVICTABLE
,
534 0, ggtt
->mappable_end
,
541 * The upper portion of the GuC address space has a sizeable hole
542 * (several MB) that is inaccessible by GuC. Reserve this range within
543 * GGTT as it can comfortably hold GuC/HuC firmware images.
545 ret
= ggtt_reserve_guc_top(ggtt
);
549 /* Clear any non-preallocated blocks */
550 drm_mm_for_each_hole(entry
, &ggtt
->vm
.mm
, hole_start
, hole_end
) {
551 drm_dbg_kms(&ggtt
->vm
.i915
->drm
,
552 "clearing unused GTT space: [%lx, %lx]\n",
553 hole_start
, hole_end
);
554 ggtt
->vm
.clear_range(&ggtt
->vm
, hole_start
,
555 hole_end
- hole_start
);
558 /* And finally clear the reserved guard page */
559 ggtt
->vm
.clear_range(&ggtt
->vm
, ggtt
->vm
.total
- PAGE_SIZE
, PAGE_SIZE
);
564 cleanup_init_ggtt(ggtt
);
568 static void aliasing_gtt_bind_vma(struct i915_address_space
*vm
,
569 struct i915_vm_pt_stash
*stash
,
570 struct i915_vma
*vma
,
571 enum i915_cache_level cache_level
,
576 /* Currently applicable only to VLV */
578 if (i915_gem_object_is_readonly(vma
->obj
))
579 pte_flags
|= PTE_READ_ONLY
;
581 if (flags
& I915_VMA_LOCAL_BIND
)
582 ppgtt_bind_vma(&i915_vm_to_ggtt(vm
)->alias
->vm
,
583 stash
, vma
, cache_level
, flags
);
585 if (flags
& I915_VMA_GLOBAL_BIND
)
586 vm
->insert_entries(vm
, vma
, cache_level
, pte_flags
);
589 static void aliasing_gtt_unbind_vma(struct i915_address_space
*vm
,
590 struct i915_vma
*vma
)
592 if (i915_vma_is_bound(vma
, I915_VMA_GLOBAL_BIND
))
593 vm
->clear_range(vm
, vma
->node
.start
, vma
->size
);
595 if (i915_vma_is_bound(vma
, I915_VMA_LOCAL_BIND
))
596 ppgtt_unbind_vma(&i915_vm_to_ggtt(vm
)->alias
->vm
, vma
);
599 static int init_aliasing_ppgtt(struct i915_ggtt
*ggtt
)
601 struct i915_vm_pt_stash stash
= {};
602 struct i915_ppgtt
*ppgtt
;
605 ppgtt
= i915_ppgtt_create(ggtt
->vm
.gt
);
607 return PTR_ERR(ppgtt
);
609 if (GEM_WARN_ON(ppgtt
->vm
.total
< ggtt
->vm
.total
)) {
614 err
= i915_vm_alloc_pt_stash(&ppgtt
->vm
, &stash
, ggtt
->vm
.total
);
618 err
= i915_vm_pin_pt_stash(&ppgtt
->vm
, &stash
);
623 * Note we only pre-allocate as far as the end of the global
624 * GTT. On 48b / 4-level page-tables, the difference is very,
625 * very significant! We have to preallocate as GVT/vgpu does
626 * not like the page directory disappearing.
628 ppgtt
->vm
.allocate_va_range(&ppgtt
->vm
, &stash
, 0, ggtt
->vm
.total
);
631 ggtt
->vm
.bind_async_flags
|= ppgtt
->vm
.bind_async_flags
;
633 GEM_BUG_ON(ggtt
->vm
.vma_ops
.bind_vma
!= ggtt_bind_vma
);
634 ggtt
->vm
.vma_ops
.bind_vma
= aliasing_gtt_bind_vma
;
636 GEM_BUG_ON(ggtt
->vm
.vma_ops
.unbind_vma
!= ggtt_unbind_vma
);
637 ggtt
->vm
.vma_ops
.unbind_vma
= aliasing_gtt_unbind_vma
;
639 i915_vm_free_pt_stash(&ppgtt
->vm
, &stash
);
643 i915_vm_free_pt_stash(&ppgtt
->vm
, &stash
);
645 i915_vm_put(&ppgtt
->vm
);
649 static void fini_aliasing_ppgtt(struct i915_ggtt
*ggtt
)
651 struct i915_ppgtt
*ppgtt
;
653 ppgtt
= fetch_and_zero(&ggtt
->alias
);
657 i915_vm_put(&ppgtt
->vm
);
659 ggtt
->vm
.vma_ops
.bind_vma
= ggtt_bind_vma
;
660 ggtt
->vm
.vma_ops
.unbind_vma
= ggtt_unbind_vma
;
663 int i915_init_ggtt(struct drm_i915_private
*i915
)
667 ret
= init_ggtt(&i915
->ggtt
);
671 if (INTEL_PPGTT(i915
) == INTEL_PPGTT_ALIASING
) {
672 ret
= init_aliasing_ppgtt(&i915
->ggtt
);
674 cleanup_init_ggtt(&i915
->ggtt
);
680 static void ggtt_cleanup_hw(struct i915_ggtt
*ggtt
)
682 struct i915_vma
*vma
, *vn
;
684 atomic_set(&ggtt
->vm
.open
, 0);
686 rcu_barrier(); /* flush the RCU'ed__i915_vm_release */
687 flush_workqueue(ggtt
->vm
.i915
->wq
);
689 mutex_lock(&ggtt
->vm
.mutex
);
691 list_for_each_entry_safe(vma
, vn
, &ggtt
->vm
.bound_list
, vm_link
)
692 WARN_ON(__i915_vma_unbind(vma
));
694 if (drm_mm_node_allocated(&ggtt
->error_capture
))
695 drm_mm_remove_node(&ggtt
->error_capture
);
696 mutex_destroy(&ggtt
->error_mutex
);
698 ggtt_release_guc_top(ggtt
);
699 intel_vgt_deballoon(ggtt
);
701 ggtt
->vm
.cleanup(&ggtt
->vm
);
703 mutex_unlock(&ggtt
->vm
.mutex
);
704 i915_address_space_fini(&ggtt
->vm
);
706 arch_phys_wc_del(ggtt
->mtrr
);
708 if (ggtt
->iomap
.size
)
709 io_mapping_fini(&ggtt
->iomap
);
713 * i915_ggtt_driver_release - Clean up GGTT hardware initialization
716 void i915_ggtt_driver_release(struct drm_i915_private
*i915
)
718 struct i915_ggtt
*ggtt
= &i915
->ggtt
;
720 fini_aliasing_ppgtt(ggtt
);
722 intel_ggtt_fini_fences(ggtt
);
723 ggtt_cleanup_hw(ggtt
);
726 static unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl
)
728 snb_gmch_ctl
>>= SNB_GMCH_GGMS_SHIFT
;
729 snb_gmch_ctl
&= SNB_GMCH_GGMS_MASK
;
730 return snb_gmch_ctl
<< 20;
733 static unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl
)
735 bdw_gmch_ctl
>>= BDW_GMCH_GGMS_SHIFT
;
736 bdw_gmch_ctl
&= BDW_GMCH_GGMS_MASK
;
738 bdw_gmch_ctl
= 1 << bdw_gmch_ctl
;
741 /* Limit 32b platforms to a 2GB GGTT: 4 << 20 / pte size * I915_GTT_PAGE_SIZE */
742 if (bdw_gmch_ctl
> 4)
746 return bdw_gmch_ctl
<< 20;
749 static unsigned int chv_get_total_gtt_size(u16 gmch_ctrl
)
751 gmch_ctrl
>>= SNB_GMCH_GGMS_SHIFT
;
752 gmch_ctrl
&= SNB_GMCH_GGMS_MASK
;
755 return 1 << (20 + gmch_ctrl
);
760 static int ggtt_probe_common(struct i915_ggtt
*ggtt
, u64 size
)
762 struct drm_i915_private
*i915
= ggtt
->vm
.i915
;
763 struct pci_dev
*pdev
= i915
->drm
.pdev
;
764 phys_addr_t phys_addr
;
767 /* For Modern GENs the PTEs and register space are split in the BAR */
768 phys_addr
= pci_resource_start(pdev
, 0) + pci_resource_len(pdev
, 0) / 2;
771 * On BXT+/CNL+ writes larger than 64 bit to the GTT pagetable range
772 * will be dropped. For WC mappings in general we have 64 byte burst
773 * writes when the WC buffer is flushed, so we can't use it, but have to
774 * resort to an uncached mapping. The WC issue is easily caught by the
775 * readback check when writing GTT PTE entries.
777 if (IS_GEN9_LP(i915
) || INTEL_GEN(i915
) >= 10)
778 ggtt
->gsm
= ioremap(phys_addr
, size
);
780 ggtt
->gsm
= ioremap_wc(phys_addr
, size
);
782 drm_err(&i915
->drm
, "Failed to map the ggtt page table\n");
786 ret
= setup_scratch_page(&ggtt
->vm
);
788 drm_err(&i915
->drm
, "Scratch setup failed\n");
789 /* iounmap will also get called at remove, but meh */
794 ggtt
->vm
.scratch
[0]->encode
=
795 ggtt
->vm
.pte_encode(px_dma(ggtt
->vm
.scratch
[0]),
801 int ggtt_set_pages(struct i915_vma
*vma
)
805 GEM_BUG_ON(vma
->pages
);
807 ret
= i915_get_ggtt_vma_pages(vma
);
811 vma
->page_sizes
= vma
->obj
->mm
.page_sizes
;
816 static void gen6_gmch_remove(struct i915_address_space
*vm
)
818 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
824 static struct resource
pci_resource(struct pci_dev
*pdev
, int bar
)
826 return (struct resource
)DEFINE_RES_MEM(pci_resource_start(pdev
, bar
),
827 pci_resource_len(pdev
, bar
));
830 static int gen8_gmch_probe(struct i915_ggtt
*ggtt
)
832 struct drm_i915_private
*i915
= ggtt
->vm
.i915
;
833 struct pci_dev
*pdev
= i915
->drm
.pdev
;
837 /* TODO: We're not aware of mappable constraints on gen8 yet */
838 if (!HAS_LMEM(i915
)) {
839 ggtt
->gmadr
= pci_resource(pdev
, 2);
840 ggtt
->mappable_end
= resource_size(&ggtt
->gmadr
);
843 pci_read_config_word(pdev
, SNB_GMCH_CTRL
, &snb_gmch_ctl
);
844 if (IS_CHERRYVIEW(i915
))
845 size
= chv_get_total_gtt_size(snb_gmch_ctl
);
847 size
= gen8_get_total_gtt_size(snb_gmch_ctl
);
849 ggtt
->vm
.alloc_pt_dma
= alloc_pt_dma
;
851 ggtt
->vm
.total
= (size
/ sizeof(gen8_pte_t
)) * I915_GTT_PAGE_SIZE
;
852 ggtt
->vm
.cleanup
= gen6_gmch_remove
;
853 ggtt
->vm
.insert_page
= gen8_ggtt_insert_page
;
854 ggtt
->vm
.clear_range
= nop_clear_range
;
855 if (intel_scanout_needs_vtd_wa(i915
))
856 ggtt
->vm
.clear_range
= gen8_ggtt_clear_range
;
858 ggtt
->vm
.insert_entries
= gen8_ggtt_insert_entries
;
860 /* Serialize GTT updates with aperture access on BXT if VT-d is on. */
861 if (intel_ggtt_update_needs_vtd_wa(i915
) ||
862 IS_CHERRYVIEW(i915
) /* fails with concurrent use/update */) {
863 ggtt
->vm
.insert_entries
= bxt_vtd_ggtt_insert_entries__BKL
;
864 ggtt
->vm
.insert_page
= bxt_vtd_ggtt_insert_page__BKL
;
865 ggtt
->vm
.bind_async_flags
=
866 I915_VMA_GLOBAL_BIND
| I915_VMA_LOCAL_BIND
;
869 ggtt
->invalidate
= gen8_ggtt_invalidate
;
871 ggtt
->vm
.vma_ops
.bind_vma
= ggtt_bind_vma
;
872 ggtt
->vm
.vma_ops
.unbind_vma
= ggtt_unbind_vma
;
873 ggtt
->vm
.vma_ops
.set_pages
= ggtt_set_pages
;
874 ggtt
->vm
.vma_ops
.clear_pages
= clear_pages
;
876 ggtt
->vm
.pte_encode
= gen8_ggtt_pte_encode
;
878 setup_private_pat(ggtt
->vm
.gt
->uncore
);
880 return ggtt_probe_common(ggtt
, size
);
883 static u64
snb_pte_encode(dma_addr_t addr
,
884 enum i915_cache_level level
,
887 gen6_pte_t pte
= GEN6_PTE_ADDR_ENCODE(addr
) | GEN6_PTE_VALID
;
890 case I915_CACHE_L3_LLC
:
892 pte
|= GEN6_PTE_CACHE_LLC
;
894 case I915_CACHE_NONE
:
895 pte
|= GEN6_PTE_UNCACHED
;
904 static u64
ivb_pte_encode(dma_addr_t addr
,
905 enum i915_cache_level level
,
908 gen6_pte_t pte
= GEN6_PTE_ADDR_ENCODE(addr
) | GEN6_PTE_VALID
;
911 case I915_CACHE_L3_LLC
:
912 pte
|= GEN7_PTE_CACHE_L3_LLC
;
915 pte
|= GEN6_PTE_CACHE_LLC
;
917 case I915_CACHE_NONE
:
918 pte
|= GEN6_PTE_UNCACHED
;
927 static u64
byt_pte_encode(dma_addr_t addr
,
928 enum i915_cache_level level
,
931 gen6_pte_t pte
= GEN6_PTE_ADDR_ENCODE(addr
) | GEN6_PTE_VALID
;
933 if (!(flags
& PTE_READ_ONLY
))
934 pte
|= BYT_PTE_WRITEABLE
;
936 if (level
!= I915_CACHE_NONE
)
937 pte
|= BYT_PTE_SNOOPED_BY_CPU_CACHES
;
942 static u64
hsw_pte_encode(dma_addr_t addr
,
943 enum i915_cache_level level
,
946 gen6_pte_t pte
= HSW_PTE_ADDR_ENCODE(addr
) | GEN6_PTE_VALID
;
948 if (level
!= I915_CACHE_NONE
)
949 pte
|= HSW_WB_LLC_AGE3
;
954 static u64
iris_pte_encode(dma_addr_t addr
,
955 enum i915_cache_level level
,
958 gen6_pte_t pte
= HSW_PTE_ADDR_ENCODE(addr
) | GEN6_PTE_VALID
;
961 case I915_CACHE_NONE
:
964 pte
|= HSW_WT_ELLC_LLC_AGE3
;
967 pte
|= HSW_WB_ELLC_LLC_AGE3
;
974 static int gen6_gmch_probe(struct i915_ggtt
*ggtt
)
976 struct drm_i915_private
*i915
= ggtt
->vm
.i915
;
977 struct pci_dev
*pdev
= i915
->drm
.pdev
;
981 ggtt
->gmadr
= pci_resource(pdev
, 2);
982 ggtt
->mappable_end
= resource_size(&ggtt
->gmadr
);
985 * 64/512MB is the current min/max we actually know of, but this is
986 * just a coarse sanity check.
988 if (ggtt
->mappable_end
< (64<<20) || ggtt
->mappable_end
> (512<<20)) {
989 drm_err(&i915
->drm
, "Unknown GMADR size (%pa)\n",
990 &ggtt
->mappable_end
);
994 pci_read_config_word(pdev
, SNB_GMCH_CTRL
, &snb_gmch_ctl
);
996 size
= gen6_get_total_gtt_size(snb_gmch_ctl
);
997 ggtt
->vm
.total
= (size
/ sizeof(gen6_pte_t
)) * I915_GTT_PAGE_SIZE
;
999 ggtt
->vm
.alloc_pt_dma
= alloc_pt_dma
;
1001 ggtt
->vm
.clear_range
= nop_clear_range
;
1002 if (!HAS_FULL_PPGTT(i915
) || intel_scanout_needs_vtd_wa(i915
))
1003 ggtt
->vm
.clear_range
= gen6_ggtt_clear_range
;
1004 ggtt
->vm
.insert_page
= gen6_ggtt_insert_page
;
1005 ggtt
->vm
.insert_entries
= gen6_ggtt_insert_entries
;
1006 ggtt
->vm
.cleanup
= gen6_gmch_remove
;
1008 ggtt
->invalidate
= gen6_ggtt_invalidate
;
1010 if (HAS_EDRAM(i915
))
1011 ggtt
->vm
.pte_encode
= iris_pte_encode
;
1012 else if (IS_HASWELL(i915
))
1013 ggtt
->vm
.pte_encode
= hsw_pte_encode
;
1014 else if (IS_VALLEYVIEW(i915
))
1015 ggtt
->vm
.pte_encode
= byt_pte_encode
;
1016 else if (INTEL_GEN(i915
) >= 7)
1017 ggtt
->vm
.pte_encode
= ivb_pte_encode
;
1019 ggtt
->vm
.pte_encode
= snb_pte_encode
;
1021 ggtt
->vm
.vma_ops
.bind_vma
= ggtt_bind_vma
;
1022 ggtt
->vm
.vma_ops
.unbind_vma
= ggtt_unbind_vma
;
1023 ggtt
->vm
.vma_ops
.set_pages
= ggtt_set_pages
;
1024 ggtt
->vm
.vma_ops
.clear_pages
= clear_pages
;
1026 return ggtt_probe_common(ggtt
, size
);
1029 static void i915_gmch_remove(struct i915_address_space
*vm
)
1031 intel_gmch_remove();
1034 static int i915_gmch_probe(struct i915_ggtt
*ggtt
)
1036 struct drm_i915_private
*i915
= ggtt
->vm
.i915
;
1037 phys_addr_t gmadr_base
;
1040 ret
= intel_gmch_probe(i915
->bridge_dev
, i915
->drm
.pdev
, NULL
);
1042 drm_err(&i915
->drm
, "failed to set up gmch\n");
1046 intel_gtt_get(&ggtt
->vm
.total
, &gmadr_base
, &ggtt
->mappable_end
);
1049 (struct resource
)DEFINE_RES_MEM(gmadr_base
, ggtt
->mappable_end
);
1051 ggtt
->vm
.alloc_pt_dma
= alloc_pt_dma
;
1053 ggtt
->do_idle_maps
= needs_idle_maps(i915
);
1054 ggtt
->vm
.insert_page
= i915_ggtt_insert_page
;
1055 ggtt
->vm
.insert_entries
= i915_ggtt_insert_entries
;
1056 ggtt
->vm
.clear_range
= i915_ggtt_clear_range
;
1057 ggtt
->vm
.cleanup
= i915_gmch_remove
;
1059 ggtt
->invalidate
= gmch_ggtt_invalidate
;
1061 ggtt
->vm
.vma_ops
.bind_vma
= ggtt_bind_vma
;
1062 ggtt
->vm
.vma_ops
.unbind_vma
= ggtt_unbind_vma
;
1063 ggtt
->vm
.vma_ops
.set_pages
= ggtt_set_pages
;
1064 ggtt
->vm
.vma_ops
.clear_pages
= clear_pages
;
1066 if (unlikely(ggtt
->do_idle_maps
))
1067 drm_notice(&i915
->drm
,
1068 "Applying Ironlake quirks for intel_iommu\n");
1073 static int ggtt_probe_hw(struct i915_ggtt
*ggtt
, struct intel_gt
*gt
)
1075 struct drm_i915_private
*i915
= gt
->i915
;
1079 ggtt
->vm
.i915
= i915
;
1080 ggtt
->vm
.dma
= &i915
->drm
.pdev
->dev
;
1082 if (INTEL_GEN(i915
) <= 5)
1083 ret
= i915_gmch_probe(ggtt
);
1084 else if (INTEL_GEN(i915
) < 8)
1085 ret
= gen6_gmch_probe(ggtt
);
1087 ret
= gen8_gmch_probe(ggtt
);
1091 if ((ggtt
->vm
.total
- 1) >> 32) {
1093 "We never expected a Global GTT with more than 32bits"
1094 " of address space! Found %lldM!\n",
1095 ggtt
->vm
.total
>> 20);
1096 ggtt
->vm
.total
= 1ULL << 32;
1097 ggtt
->mappable_end
=
1098 min_t(u64
, ggtt
->mappable_end
, ggtt
->vm
.total
);
1101 if (ggtt
->mappable_end
> ggtt
->vm
.total
) {
1103 "mappable aperture extends past end of GGTT,"
1104 " aperture=%pa, total=%llx\n",
1105 &ggtt
->mappable_end
, ggtt
->vm
.total
);
1106 ggtt
->mappable_end
= ggtt
->vm
.total
;
1109 /* GMADR is the PCI mmio aperture into the global GTT. */
1110 drm_dbg(&i915
->drm
, "GGTT size = %lluM\n", ggtt
->vm
.total
>> 20);
1111 drm_dbg(&i915
->drm
, "GMADR size = %lluM\n",
1112 (u64
)ggtt
->mappable_end
>> 20);
1113 drm_dbg(&i915
->drm
, "DSM size = %lluM\n",
1114 (u64
)resource_size(&intel_graphics_stolen_res
) >> 20);
1120 * i915_ggtt_probe_hw - Probe GGTT hardware location
1121 * @i915: i915 device
1123 int i915_ggtt_probe_hw(struct drm_i915_private
*i915
)
1127 ret
= ggtt_probe_hw(&i915
->ggtt
, &i915
->gt
);
1131 if (intel_vtd_active())
1132 drm_info(&i915
->drm
, "VT-d active for gfx access\n");
1137 int i915_ggtt_enable_hw(struct drm_i915_private
*i915
)
1139 if (INTEL_GEN(i915
) < 6 && !intel_enable_gtt())
1145 void i915_ggtt_enable_guc(struct i915_ggtt
*ggtt
)
1147 GEM_BUG_ON(ggtt
->invalidate
!= gen8_ggtt_invalidate
);
1149 ggtt
->invalidate
= guc_ggtt_invalidate
;
1151 ggtt
->invalidate(ggtt
);
1154 void i915_ggtt_disable_guc(struct i915_ggtt
*ggtt
)
1156 /* XXX Temporary pardon for error unload */
1157 if (ggtt
->invalidate
== gen8_ggtt_invalidate
)
1160 /* We should only be called after i915_ggtt_enable_guc() */
1161 GEM_BUG_ON(ggtt
->invalidate
!= guc_ggtt_invalidate
);
1163 ggtt
->invalidate
= gen8_ggtt_invalidate
;
1165 ggtt
->invalidate(ggtt
);
1168 void i915_ggtt_resume(struct i915_ggtt
*ggtt
)
1170 struct i915_vma
*vma
;
1174 intel_gt_check_and_clear_faults(ggtt
->vm
.gt
);
1176 /* First fill our portion of the GTT with scratch pages */
1177 ggtt
->vm
.clear_range(&ggtt
->vm
, 0, ggtt
->vm
.total
);
1179 /* Skip rewriting PTE on VMA unbind. */
1180 open
= atomic_xchg(&ggtt
->vm
.open
, 0);
1182 /* clflush objects bound into the GGTT and rebind them. */
1183 list_for_each_entry(vma
, &ggtt
->vm
.bound_list
, vm_link
) {
1184 struct drm_i915_gem_object
*obj
= vma
->obj
;
1185 unsigned int was_bound
=
1186 atomic_read(&vma
->flags
) & I915_VMA_BIND_MASK
;
1188 GEM_BUG_ON(!was_bound
);
1189 vma
->ops
->bind_vma(&ggtt
->vm
, NULL
, vma
,
1190 obj
? obj
->cache_level
: 0,
1192 if (obj
) { /* only used during resume => exclusive access */
1193 flush
|= fetch_and_zero(&obj
->write_domain
);
1194 obj
->read_domains
|= I915_GEM_DOMAIN_GTT
;
1198 atomic_set(&ggtt
->vm
.open
, open
);
1199 ggtt
->invalidate(ggtt
);
1202 wbinvd_on_all_cpus();
1204 if (INTEL_GEN(ggtt
->vm
.i915
) >= 8)
1205 setup_private_pat(ggtt
->vm
.gt
->uncore
);
1207 intel_ggtt_restore_fences(ggtt
);
1210 static struct scatterlist
*
1211 rotate_pages(struct drm_i915_gem_object
*obj
, unsigned int offset
,
1212 unsigned int width
, unsigned int height
,
1213 unsigned int stride
,
1214 struct sg_table
*st
, struct scatterlist
*sg
)
1216 unsigned int column
, row
;
1217 unsigned int src_idx
;
1219 for (column
= 0; column
< width
; column
++) {
1220 src_idx
= stride
* (height
- 1) + column
+ offset
;
1221 for (row
= 0; row
< height
; row
++) {
1224 * We don't need the pages, but need to initialize
1225 * the entries so the sg list can be happily traversed.
1226 * The only thing we need are DMA addresses.
1228 sg_set_page(sg
, NULL
, I915_GTT_PAGE_SIZE
, 0);
1229 sg_dma_address(sg
) =
1230 i915_gem_object_get_dma_address(obj
, src_idx
);
1231 sg_dma_len(sg
) = I915_GTT_PAGE_SIZE
;
1240 static noinline
struct sg_table
*
1241 intel_rotate_pages(struct intel_rotation_info
*rot_info
,
1242 struct drm_i915_gem_object
*obj
)
1244 unsigned int size
= intel_rotation_info_size(rot_info
);
1245 struct drm_i915_private
*i915
= to_i915(obj
->base
.dev
);
1246 struct sg_table
*st
;
1247 struct scatterlist
*sg
;
1251 /* Allocate target SG list. */
1252 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
1256 ret
= sg_alloc_table(st
, size
, GFP_KERNEL
);
1263 for (i
= 0 ; i
< ARRAY_SIZE(rot_info
->plane
); i
++) {
1264 sg
= rotate_pages(obj
, rot_info
->plane
[i
].offset
,
1265 rot_info
->plane
[i
].width
, rot_info
->plane
[i
].height
,
1266 rot_info
->plane
[i
].stride
, st
, sg
);
1275 drm_dbg(&i915
->drm
, "Failed to create rotated mapping for object size %zu! (%ux%u tiles, %u pages)\n",
1276 obj
->base
.size
, rot_info
->plane
[0].width
,
1277 rot_info
->plane
[0].height
, size
);
1279 return ERR_PTR(ret
);
1282 static struct scatterlist
*
1283 remap_pages(struct drm_i915_gem_object
*obj
, unsigned int offset
,
1284 unsigned int width
, unsigned int height
,
1285 unsigned int stride
,
1286 struct sg_table
*st
, struct scatterlist
*sg
)
1290 for (row
= 0; row
< height
; row
++) {
1291 unsigned int left
= width
* I915_GTT_PAGE_SIZE
;
1295 unsigned int length
;
1298 * We don't need the pages, but need to initialize
1299 * the entries so the sg list can be happily traversed.
1300 * The only thing we need are DMA addresses.
1303 addr
= i915_gem_object_get_dma_address_len(obj
, offset
, &length
);
1305 length
= min(left
, length
);
1309 sg_set_page(sg
, NULL
, length
, 0);
1310 sg_dma_address(sg
) = addr
;
1311 sg_dma_len(sg
) = length
;
1314 offset
+= length
/ I915_GTT_PAGE_SIZE
;
1318 offset
+= stride
- width
;
1324 static noinline
struct sg_table
*
1325 intel_remap_pages(struct intel_remapped_info
*rem_info
,
1326 struct drm_i915_gem_object
*obj
)
1328 unsigned int size
= intel_remapped_info_size(rem_info
);
1329 struct drm_i915_private
*i915
= to_i915(obj
->base
.dev
);
1330 struct sg_table
*st
;
1331 struct scatterlist
*sg
;
1335 /* Allocate target SG list. */
1336 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
1340 ret
= sg_alloc_table(st
, size
, GFP_KERNEL
);
1347 for (i
= 0 ; i
< ARRAY_SIZE(rem_info
->plane
); i
++) {
1348 sg
= remap_pages(obj
, rem_info
->plane
[i
].offset
,
1349 rem_info
->plane
[i
].width
, rem_info
->plane
[i
].height
,
1350 rem_info
->plane
[i
].stride
, st
, sg
);
1361 drm_dbg(&i915
->drm
, "Failed to create remapped mapping for object size %zu! (%ux%u tiles, %u pages)\n",
1362 obj
->base
.size
, rem_info
->plane
[0].width
,
1363 rem_info
->plane
[0].height
, size
);
1365 return ERR_PTR(ret
);
1368 static noinline
struct sg_table
*
1369 intel_partial_pages(const struct i915_ggtt_view
*view
,
1370 struct drm_i915_gem_object
*obj
)
1372 struct sg_table
*st
;
1373 struct scatterlist
*sg
, *iter
;
1374 unsigned int count
= view
->partial
.size
;
1375 unsigned int offset
;
1378 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
1382 ret
= sg_alloc_table(st
, count
, GFP_KERNEL
);
1386 iter
= i915_gem_object_get_sg_dma(obj
, view
->partial
.offset
, &offset
);
1394 len
= min(sg_dma_len(iter
) - (offset
<< PAGE_SHIFT
),
1395 count
<< PAGE_SHIFT
);
1396 sg_set_page(sg
, NULL
, len
, 0);
1397 sg_dma_address(sg
) =
1398 sg_dma_address(iter
) + (offset
<< PAGE_SHIFT
);
1399 sg_dma_len(sg
) = len
;
1402 count
-= len
>> PAGE_SHIFT
;
1405 i915_sg_trim(st
); /* Drop any unused tail entries. */
1411 iter
= __sg_next(iter
);
1418 return ERR_PTR(ret
);
1422 i915_get_ggtt_vma_pages(struct i915_vma
*vma
)
1427 * The vma->pages are only valid within the lifespan of the borrowed
1428 * obj->mm.pages. When the obj->mm.pages sg_table is regenerated, so
1429 * must be the vma->pages. A simple rule is that vma->pages must only
1430 * be accessed when the obj->mm.pages are pinned.
1432 GEM_BUG_ON(!i915_gem_object_has_pinned_pages(vma
->obj
));
1434 switch (vma
->ggtt_view
.type
) {
1436 GEM_BUG_ON(vma
->ggtt_view
.type
);
1438 case I915_GGTT_VIEW_NORMAL
:
1439 vma
->pages
= vma
->obj
->mm
.pages
;
1442 case I915_GGTT_VIEW_ROTATED
:
1444 intel_rotate_pages(&vma
->ggtt_view
.rotated
, vma
->obj
);
1447 case I915_GGTT_VIEW_REMAPPED
:
1449 intel_remap_pages(&vma
->ggtt_view
.remapped
, vma
->obj
);
1452 case I915_GGTT_VIEW_PARTIAL
:
1453 vma
->pages
= intel_partial_pages(&vma
->ggtt_view
, vma
->obj
);
1458 if (IS_ERR(vma
->pages
)) {
1459 ret
= PTR_ERR(vma
->pages
);
1461 drm_err(&vma
->vm
->i915
->drm
,
1462 "Failed to get pages for VMA view type %u (%d)!\n",
1463 vma
->ggtt_view
.type
, ret
);