2 * Copyright © 2010 Daniel Vetter
3 * Copyright © 2011-2014 Intel Corporation
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
26 #include <linux/seq_file.h>
27 #include <linux/stop_machine.h>
29 #include <drm/i915_drm.h>
31 #include "i915_vgpu.h"
32 #include "i915_trace.h"
33 #include "intel_drv.h"
35 #define I915_GFP_DMA (GFP_KERNEL | __GFP_HIGHMEM)
38 * DOC: Global GTT views
40 * Background and previous state
42 * Historically objects could exists (be bound) in global GTT space only as
43 * singular instances with a view representing all of the object's backing pages
44 * in a linear fashion. This view will be called a normal view.
46 * To support multiple views of the same object, where the number of mapped
47 * pages is not equal to the backing store, or where the layout of the pages
48 * is not linear, concept of a GGTT view was added.
50 * One example of an alternative view is a stereo display driven by a single
51 * image. In this case we would have a framebuffer looking like this
57 * Above would represent a normal GGTT view as normally mapped for GPU or CPU
58 * rendering. In contrast, fed to the display engine would be an alternative
59 * view which could look something like this:
64 * In this example both the size and layout of pages in the alternative view is
65 * different from the normal view.
67 * Implementation and usage
69 * GGTT views are implemented using VMAs and are distinguished via enum
70 * i915_ggtt_view_type and struct i915_ggtt_view.
72 * A new flavour of core GEM functions which work with GGTT bound objects were
73 * added with the _ggtt_ infix, and sometimes with _view postfix to avoid
74 * renaming in large amounts of code. They take the struct i915_ggtt_view
75 * parameter encapsulating all metadata required to implement a view.
77 * As a helper for callers which are only interested in the normal view,
78 * globally const i915_ggtt_view_normal singleton instance exists. All old core
79 * GEM API functions, the ones not taking the view parameter, are operating on,
80 * or with the normal GGTT view.
82 * Code wanting to add or use a new GGTT view needs to:
84 * 1. Add a new enum with a suitable name.
85 * 2. Extend the metadata in the i915_ggtt_view structure if required.
86 * 3. Add support to i915_get_vma_pages().
88 * New views are required to build a scatter-gather table from within the
89 * i915_get_vma_pages function. This table is stored in the vma.ggtt_view and
90 * exists for the lifetime of an VMA.
92 * Core API is designed to have copy semantics which means that passed in
93 * struct i915_ggtt_view does not need to be persistent (left around after
94 * calling the core API functions).
98 static inline struct i915_ggtt
*
99 i915_vm_to_ggtt(struct i915_address_space
*vm
)
101 GEM_BUG_ON(!i915_is_ggtt(vm
));
102 return container_of(vm
, struct i915_ggtt
, base
);
106 i915_get_ggtt_vma_pages(struct i915_vma
*vma
);
108 const struct i915_ggtt_view i915_ggtt_view_normal
= {
109 .type
= I915_GGTT_VIEW_NORMAL
,
111 const struct i915_ggtt_view i915_ggtt_view_rotated
= {
112 .type
= I915_GGTT_VIEW_ROTATED
,
115 int intel_sanitize_enable_ppgtt(struct drm_i915_private
*dev_priv
,
118 bool has_aliasing_ppgtt
;
120 bool has_full_48bit_ppgtt
;
122 has_aliasing_ppgtt
= INTEL_GEN(dev_priv
) >= 6;
123 has_full_ppgtt
= INTEL_GEN(dev_priv
) >= 7;
124 has_full_48bit_ppgtt
=
125 IS_BROADWELL(dev_priv
) || INTEL_GEN(dev_priv
) >= 9;
127 if (intel_vgpu_active(dev_priv
)) {
128 /* emulation is too hard */
129 has_full_ppgtt
= false;
130 has_full_48bit_ppgtt
= false;
133 if (!has_aliasing_ppgtt
)
137 * We don't allow disabling PPGTT for gen9+ as it's a requirement for
138 * execlists, the sole mechanism available to submit work.
140 if (enable_ppgtt
== 0 && INTEL_GEN(dev_priv
) < 9)
143 if (enable_ppgtt
== 1)
146 if (enable_ppgtt
== 2 && has_full_ppgtt
)
149 if (enable_ppgtt
== 3 && has_full_48bit_ppgtt
)
152 #ifdef CONFIG_INTEL_IOMMU
153 /* Disable ppgtt on SNB if VT-d is on. */
154 if (IS_GEN6(dev_priv
) && intel_iommu_gfx_mapped
) {
155 DRM_INFO("Disabling PPGTT because VT-d is on\n");
160 /* Early VLV doesn't have this */
161 if (IS_VALLEYVIEW(dev_priv
) && dev_priv
->drm
.pdev
->revision
< 0xb) {
162 DRM_DEBUG_DRIVER("disabling PPGTT on pre-B3 step VLV\n");
166 if (INTEL_GEN(dev_priv
) >= 8 && i915
.enable_execlists
&& has_full_ppgtt
)
167 return has_full_48bit_ppgtt
? 3 : 2;
169 return has_aliasing_ppgtt
? 1 : 0;
172 static int ppgtt_bind_vma(struct i915_vma
*vma
,
173 enum i915_cache_level cache_level
,
178 vma
->pages
= vma
->obj
->pages
;
180 /* Currently applicable only to VLV */
182 pte_flags
|= PTE_READ_ONLY
;
184 vma
->vm
->insert_entries(vma
->vm
, vma
->pages
, vma
->node
.start
,
185 cache_level
, pte_flags
);
190 static void ppgtt_unbind_vma(struct i915_vma
*vma
)
192 vma
->vm
->clear_range(vma
->vm
,
198 static gen8_pte_t
gen8_pte_encode(dma_addr_t addr
,
199 enum i915_cache_level level
,
202 gen8_pte_t pte
= valid
? _PAGE_PRESENT
| _PAGE_RW
: 0;
206 case I915_CACHE_NONE
:
207 pte
|= PPAT_UNCACHED_INDEX
;
210 pte
|= PPAT_DISPLAY_ELLC_INDEX
;
213 pte
|= PPAT_CACHED_INDEX
;
220 static gen8_pde_t
gen8_pde_encode(const dma_addr_t addr
,
221 const enum i915_cache_level level
)
223 gen8_pde_t pde
= _PAGE_PRESENT
| _PAGE_RW
;
225 if (level
!= I915_CACHE_NONE
)
226 pde
|= PPAT_CACHED_PDE_INDEX
;
228 pde
|= PPAT_UNCACHED_INDEX
;
232 #define gen8_pdpe_encode gen8_pde_encode
233 #define gen8_pml4e_encode gen8_pde_encode
235 static gen6_pte_t
snb_pte_encode(dma_addr_t addr
,
236 enum i915_cache_level level
,
237 bool valid
, u32 unused
)
239 gen6_pte_t pte
= valid
? GEN6_PTE_VALID
: 0;
240 pte
|= GEN6_PTE_ADDR_ENCODE(addr
);
243 case I915_CACHE_L3_LLC
:
245 pte
|= GEN6_PTE_CACHE_LLC
;
247 case I915_CACHE_NONE
:
248 pte
|= GEN6_PTE_UNCACHED
;
257 static gen6_pte_t
ivb_pte_encode(dma_addr_t addr
,
258 enum i915_cache_level level
,
259 bool valid
, u32 unused
)
261 gen6_pte_t pte
= valid
? GEN6_PTE_VALID
: 0;
262 pte
|= GEN6_PTE_ADDR_ENCODE(addr
);
265 case I915_CACHE_L3_LLC
:
266 pte
|= GEN7_PTE_CACHE_L3_LLC
;
269 pte
|= GEN6_PTE_CACHE_LLC
;
271 case I915_CACHE_NONE
:
272 pte
|= GEN6_PTE_UNCACHED
;
281 static gen6_pte_t
byt_pte_encode(dma_addr_t addr
,
282 enum i915_cache_level level
,
283 bool valid
, u32 flags
)
285 gen6_pte_t pte
= valid
? GEN6_PTE_VALID
: 0;
286 pte
|= GEN6_PTE_ADDR_ENCODE(addr
);
288 if (!(flags
& PTE_READ_ONLY
))
289 pte
|= BYT_PTE_WRITEABLE
;
291 if (level
!= I915_CACHE_NONE
)
292 pte
|= BYT_PTE_SNOOPED_BY_CPU_CACHES
;
297 static gen6_pte_t
hsw_pte_encode(dma_addr_t addr
,
298 enum i915_cache_level level
,
299 bool valid
, u32 unused
)
301 gen6_pte_t pte
= valid
? GEN6_PTE_VALID
: 0;
302 pte
|= HSW_PTE_ADDR_ENCODE(addr
);
304 if (level
!= I915_CACHE_NONE
)
305 pte
|= HSW_WB_LLC_AGE3
;
310 static gen6_pte_t
iris_pte_encode(dma_addr_t addr
,
311 enum i915_cache_level level
,
312 bool valid
, u32 unused
)
314 gen6_pte_t pte
= valid
? GEN6_PTE_VALID
: 0;
315 pte
|= HSW_PTE_ADDR_ENCODE(addr
);
318 case I915_CACHE_NONE
:
321 pte
|= HSW_WT_ELLC_LLC_AGE3
;
324 pte
|= HSW_WB_ELLC_LLC_AGE3
;
331 static int __setup_page_dma(struct drm_device
*dev
,
332 struct i915_page_dma
*p
, gfp_t flags
)
334 struct device
*kdev
= &dev
->pdev
->dev
;
336 p
->page
= alloc_page(flags
);
340 p
->daddr
= dma_map_page(kdev
,
341 p
->page
, 0, 4096, PCI_DMA_BIDIRECTIONAL
);
343 if (dma_mapping_error(kdev
, p
->daddr
)) {
344 __free_page(p
->page
);
351 static int setup_page_dma(struct drm_device
*dev
, struct i915_page_dma
*p
)
353 return __setup_page_dma(dev
, p
, I915_GFP_DMA
);
356 static void cleanup_page_dma(struct drm_device
*dev
, struct i915_page_dma
*p
)
358 struct pci_dev
*pdev
= dev
->pdev
;
360 if (WARN_ON(!p
->page
))
363 dma_unmap_page(&pdev
->dev
, p
->daddr
, 4096, PCI_DMA_BIDIRECTIONAL
);
364 __free_page(p
->page
);
365 memset(p
, 0, sizeof(*p
));
368 static void *kmap_page_dma(struct i915_page_dma
*p
)
370 return kmap_atomic(p
->page
);
373 /* We use the flushing unmap only with ppgtt structures:
374 * page directories, page tables and scratch pages.
376 static void kunmap_page_dma(struct drm_device
*dev
, void *vaddr
)
378 /* There are only few exceptions for gen >=6. chv and bxt.
379 * And we are not sure about the latter so play safe for now.
381 if (IS_CHERRYVIEW(dev
) || IS_BROXTON(dev
))
382 drm_clflush_virt_range(vaddr
, PAGE_SIZE
);
384 kunmap_atomic(vaddr
);
387 #define kmap_px(px) kmap_page_dma(px_base(px))
388 #define kunmap_px(ppgtt, vaddr) kunmap_page_dma((ppgtt)->base.dev, (vaddr))
390 #define setup_px(dev, px) setup_page_dma((dev), px_base(px))
391 #define cleanup_px(dev, px) cleanup_page_dma((dev), px_base(px))
392 #define fill_px(dev, px, v) fill_page_dma((dev), px_base(px), (v))
393 #define fill32_px(dev, px, v) fill_page_dma_32((dev), px_base(px), (v))
395 static void fill_page_dma(struct drm_device
*dev
, struct i915_page_dma
*p
,
399 uint64_t * const vaddr
= kmap_page_dma(p
);
401 for (i
= 0; i
< 512; i
++)
404 kunmap_page_dma(dev
, vaddr
);
407 static void fill_page_dma_32(struct drm_device
*dev
, struct i915_page_dma
*p
,
408 const uint32_t val32
)
414 fill_page_dma(dev
, p
, v
);
418 setup_scratch_page(struct drm_device
*dev
,
419 struct i915_page_dma
*scratch
,
422 return __setup_page_dma(dev
, scratch
, gfp
| __GFP_ZERO
);
425 static void cleanup_scratch_page(struct drm_device
*dev
,
426 struct i915_page_dma
*scratch
)
428 cleanup_page_dma(dev
, scratch
);
431 static struct i915_page_table
*alloc_pt(struct drm_device
*dev
)
433 struct i915_page_table
*pt
;
434 const size_t count
= INTEL_INFO(dev
)->gen
>= 8 ?
435 GEN8_PTES
: GEN6_PTES
;
438 pt
= kzalloc(sizeof(*pt
), GFP_KERNEL
);
440 return ERR_PTR(-ENOMEM
);
442 pt
->used_ptes
= kcalloc(BITS_TO_LONGS(count
), sizeof(*pt
->used_ptes
),
448 ret
= setup_px(dev
, pt
);
455 kfree(pt
->used_ptes
);
462 static void free_pt(struct drm_device
*dev
, struct i915_page_table
*pt
)
465 kfree(pt
->used_ptes
);
469 static void gen8_initialize_pt(struct i915_address_space
*vm
,
470 struct i915_page_table
*pt
)
472 gen8_pte_t scratch_pte
;
474 scratch_pte
= gen8_pte_encode(vm
->scratch_page
.daddr
,
475 I915_CACHE_LLC
, true);
477 fill_px(vm
->dev
, pt
, scratch_pte
);
480 static void gen6_initialize_pt(struct i915_address_space
*vm
,
481 struct i915_page_table
*pt
)
483 gen6_pte_t scratch_pte
;
485 WARN_ON(vm
->scratch_page
.daddr
== 0);
487 scratch_pte
= vm
->pte_encode(vm
->scratch_page
.daddr
,
488 I915_CACHE_LLC
, true, 0);
490 fill32_px(vm
->dev
, pt
, scratch_pte
);
493 static struct i915_page_directory
*alloc_pd(struct drm_device
*dev
)
495 struct i915_page_directory
*pd
;
498 pd
= kzalloc(sizeof(*pd
), GFP_KERNEL
);
500 return ERR_PTR(-ENOMEM
);
502 pd
->used_pdes
= kcalloc(BITS_TO_LONGS(I915_PDES
),
503 sizeof(*pd
->used_pdes
), GFP_KERNEL
);
507 ret
= setup_px(dev
, pd
);
514 kfree(pd
->used_pdes
);
521 static void free_pd(struct drm_device
*dev
, struct i915_page_directory
*pd
)
525 kfree(pd
->used_pdes
);
530 static void gen8_initialize_pd(struct i915_address_space
*vm
,
531 struct i915_page_directory
*pd
)
533 gen8_pde_t scratch_pde
;
535 scratch_pde
= gen8_pde_encode(px_dma(vm
->scratch_pt
), I915_CACHE_LLC
);
537 fill_px(vm
->dev
, pd
, scratch_pde
);
540 static int __pdp_init(struct drm_device
*dev
,
541 struct i915_page_directory_pointer
*pdp
)
543 size_t pdpes
= I915_PDPES_PER_PDP(dev
);
545 pdp
->used_pdpes
= kcalloc(BITS_TO_LONGS(pdpes
),
546 sizeof(unsigned long),
548 if (!pdp
->used_pdpes
)
551 pdp
->page_directory
= kcalloc(pdpes
, sizeof(*pdp
->page_directory
),
553 if (!pdp
->page_directory
) {
554 kfree(pdp
->used_pdpes
);
555 /* the PDP might be the statically allocated top level. Keep it
556 * as clean as possible */
557 pdp
->used_pdpes
= NULL
;
564 static void __pdp_fini(struct i915_page_directory_pointer
*pdp
)
566 kfree(pdp
->used_pdpes
);
567 kfree(pdp
->page_directory
);
568 pdp
->page_directory
= NULL
;
572 i915_page_directory_pointer
*alloc_pdp(struct drm_device
*dev
)
574 struct i915_page_directory_pointer
*pdp
;
577 WARN_ON(!USES_FULL_48BIT_PPGTT(dev
));
579 pdp
= kzalloc(sizeof(*pdp
), GFP_KERNEL
);
581 return ERR_PTR(-ENOMEM
);
583 ret
= __pdp_init(dev
, pdp
);
587 ret
= setup_px(dev
, pdp
);
601 static void free_pdp(struct drm_device
*dev
,
602 struct i915_page_directory_pointer
*pdp
)
605 if (USES_FULL_48BIT_PPGTT(dev
)) {
606 cleanup_px(dev
, pdp
);
611 static void gen8_initialize_pdp(struct i915_address_space
*vm
,
612 struct i915_page_directory_pointer
*pdp
)
614 gen8_ppgtt_pdpe_t scratch_pdpe
;
616 scratch_pdpe
= gen8_pdpe_encode(px_dma(vm
->scratch_pd
), I915_CACHE_LLC
);
618 fill_px(vm
->dev
, pdp
, scratch_pdpe
);
621 static void gen8_initialize_pml4(struct i915_address_space
*vm
,
622 struct i915_pml4
*pml4
)
624 gen8_ppgtt_pml4e_t scratch_pml4e
;
626 scratch_pml4e
= gen8_pml4e_encode(px_dma(vm
->scratch_pdp
),
629 fill_px(vm
->dev
, pml4
, scratch_pml4e
);
633 gen8_setup_page_directory(struct i915_hw_ppgtt
*ppgtt
,
634 struct i915_page_directory_pointer
*pdp
,
635 struct i915_page_directory
*pd
,
638 gen8_ppgtt_pdpe_t
*page_directorypo
;
640 if (!USES_FULL_48BIT_PPGTT(ppgtt
->base
.dev
))
643 page_directorypo
= kmap_px(pdp
);
644 page_directorypo
[index
] = gen8_pdpe_encode(px_dma(pd
), I915_CACHE_LLC
);
645 kunmap_px(ppgtt
, page_directorypo
);
649 gen8_setup_page_directory_pointer(struct i915_hw_ppgtt
*ppgtt
,
650 struct i915_pml4
*pml4
,
651 struct i915_page_directory_pointer
*pdp
,
654 gen8_ppgtt_pml4e_t
*pagemap
= kmap_px(pml4
);
656 WARN_ON(!USES_FULL_48BIT_PPGTT(ppgtt
->base
.dev
));
657 pagemap
[index
] = gen8_pml4e_encode(px_dma(pdp
), I915_CACHE_LLC
);
658 kunmap_px(ppgtt
, pagemap
);
661 /* Broadwell Page Directory Pointer Descriptors */
662 static int gen8_write_pdp(struct drm_i915_gem_request
*req
,
666 struct intel_ring
*ring
= req
->ring
;
667 struct intel_engine_cs
*engine
= req
->engine
;
672 ret
= intel_ring_begin(req
, 6);
676 intel_ring_emit(ring
, MI_LOAD_REGISTER_IMM(1));
677 intel_ring_emit_reg(ring
, GEN8_RING_PDP_UDW(engine
, entry
));
678 intel_ring_emit(ring
, upper_32_bits(addr
));
679 intel_ring_emit(ring
, MI_LOAD_REGISTER_IMM(1));
680 intel_ring_emit_reg(ring
, GEN8_RING_PDP_LDW(engine
, entry
));
681 intel_ring_emit(ring
, lower_32_bits(addr
));
682 intel_ring_advance(ring
);
687 static int gen8_legacy_mm_switch(struct i915_hw_ppgtt
*ppgtt
,
688 struct drm_i915_gem_request
*req
)
692 for (i
= GEN8_LEGACY_PDPES
- 1; i
>= 0; i
--) {
693 const dma_addr_t pd_daddr
= i915_page_dir_dma_addr(ppgtt
, i
);
695 ret
= gen8_write_pdp(req
, i
, pd_daddr
);
703 static int gen8_48b_mm_switch(struct i915_hw_ppgtt
*ppgtt
,
704 struct drm_i915_gem_request
*req
)
706 return gen8_write_pdp(req
, 0, px_dma(&ppgtt
->pml4
));
709 static void gen8_ppgtt_clear_pte_range(struct i915_address_space
*vm
,
710 struct i915_page_directory_pointer
*pdp
,
713 gen8_pte_t scratch_pte
)
715 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
716 gen8_pte_t
*pt_vaddr
;
717 unsigned pdpe
= gen8_pdpe_index(start
);
718 unsigned pde
= gen8_pde_index(start
);
719 unsigned pte
= gen8_pte_index(start
);
720 unsigned num_entries
= length
>> PAGE_SHIFT
;
721 unsigned last_pte
, i
;
726 while (num_entries
) {
727 struct i915_page_directory
*pd
;
728 struct i915_page_table
*pt
;
730 if (WARN_ON(!pdp
->page_directory
[pdpe
]))
733 pd
= pdp
->page_directory
[pdpe
];
735 if (WARN_ON(!pd
->page_table
[pde
]))
738 pt
= pd
->page_table
[pde
];
740 if (WARN_ON(!px_page(pt
)))
743 last_pte
= pte
+ num_entries
;
744 if (last_pte
> GEN8_PTES
)
745 last_pte
= GEN8_PTES
;
747 pt_vaddr
= kmap_px(pt
);
749 for (i
= pte
; i
< last_pte
; i
++) {
750 pt_vaddr
[i
] = scratch_pte
;
754 kunmap_px(ppgtt
, pt_vaddr
);
757 if (++pde
== I915_PDES
) {
758 if (++pdpe
== I915_PDPES_PER_PDP(vm
->dev
))
765 static void gen8_ppgtt_clear_range(struct i915_address_space
*vm
,
770 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
771 gen8_pte_t scratch_pte
= gen8_pte_encode(vm
->scratch_page
.daddr
,
772 I915_CACHE_LLC
, use_scratch
);
774 if (!USES_FULL_48BIT_PPGTT(vm
->dev
)) {
775 gen8_ppgtt_clear_pte_range(vm
, &ppgtt
->pdp
, start
, length
,
779 struct i915_page_directory_pointer
*pdp
;
781 gen8_for_each_pml4e(pdp
, &ppgtt
->pml4
, start
, length
, pml4e
) {
782 gen8_ppgtt_clear_pte_range(vm
, pdp
, start
, length
,
789 gen8_ppgtt_insert_pte_entries(struct i915_address_space
*vm
,
790 struct i915_page_directory_pointer
*pdp
,
791 struct sg_page_iter
*sg_iter
,
793 enum i915_cache_level cache_level
)
795 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
796 gen8_pte_t
*pt_vaddr
;
797 unsigned pdpe
= gen8_pdpe_index(start
);
798 unsigned pde
= gen8_pde_index(start
);
799 unsigned pte
= gen8_pte_index(start
);
803 while (__sg_page_iter_next(sg_iter
)) {
804 if (pt_vaddr
== NULL
) {
805 struct i915_page_directory
*pd
= pdp
->page_directory
[pdpe
];
806 struct i915_page_table
*pt
= pd
->page_table
[pde
];
807 pt_vaddr
= kmap_px(pt
);
811 gen8_pte_encode(sg_page_iter_dma_address(sg_iter
),
813 if (++pte
== GEN8_PTES
) {
814 kunmap_px(ppgtt
, pt_vaddr
);
816 if (++pde
== I915_PDES
) {
817 if (++pdpe
== I915_PDPES_PER_PDP(vm
->dev
))
826 kunmap_px(ppgtt
, pt_vaddr
);
829 static void gen8_ppgtt_insert_entries(struct i915_address_space
*vm
,
830 struct sg_table
*pages
,
832 enum i915_cache_level cache_level
,
835 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
836 struct sg_page_iter sg_iter
;
838 __sg_page_iter_start(&sg_iter
, pages
->sgl
, sg_nents(pages
->sgl
), 0);
840 if (!USES_FULL_48BIT_PPGTT(vm
->dev
)) {
841 gen8_ppgtt_insert_pte_entries(vm
, &ppgtt
->pdp
, &sg_iter
, start
,
844 struct i915_page_directory_pointer
*pdp
;
846 uint64_t length
= (uint64_t)pages
->orig_nents
<< PAGE_SHIFT
;
848 gen8_for_each_pml4e(pdp
, &ppgtt
->pml4
, start
, length
, pml4e
) {
849 gen8_ppgtt_insert_pte_entries(vm
, pdp
, &sg_iter
,
855 static void gen8_free_page_tables(struct drm_device
*dev
,
856 struct i915_page_directory
*pd
)
863 for_each_set_bit(i
, pd
->used_pdes
, I915_PDES
) {
864 if (WARN_ON(!pd
->page_table
[i
]))
867 free_pt(dev
, pd
->page_table
[i
]);
868 pd
->page_table
[i
] = NULL
;
872 static int gen8_init_scratch(struct i915_address_space
*vm
)
874 struct drm_device
*dev
= vm
->dev
;
877 ret
= setup_scratch_page(dev
, &vm
->scratch_page
, I915_GFP_DMA
);
881 vm
->scratch_pt
= alloc_pt(dev
);
882 if (IS_ERR(vm
->scratch_pt
)) {
883 ret
= PTR_ERR(vm
->scratch_pt
);
884 goto free_scratch_page
;
887 vm
->scratch_pd
= alloc_pd(dev
);
888 if (IS_ERR(vm
->scratch_pd
)) {
889 ret
= PTR_ERR(vm
->scratch_pd
);
893 if (USES_FULL_48BIT_PPGTT(dev
)) {
894 vm
->scratch_pdp
= alloc_pdp(dev
);
895 if (IS_ERR(vm
->scratch_pdp
)) {
896 ret
= PTR_ERR(vm
->scratch_pdp
);
901 gen8_initialize_pt(vm
, vm
->scratch_pt
);
902 gen8_initialize_pd(vm
, vm
->scratch_pd
);
903 if (USES_FULL_48BIT_PPGTT(dev
))
904 gen8_initialize_pdp(vm
, vm
->scratch_pdp
);
909 free_pd(dev
, vm
->scratch_pd
);
911 free_pt(dev
, vm
->scratch_pt
);
913 cleanup_scratch_page(dev
, &vm
->scratch_page
);
918 static int gen8_ppgtt_notify_vgt(struct i915_hw_ppgtt
*ppgtt
, bool create
)
920 enum vgt_g2v_type msg
;
921 struct drm_i915_private
*dev_priv
= to_i915(ppgtt
->base
.dev
);
924 if (USES_FULL_48BIT_PPGTT(dev_priv
)) {
925 u64 daddr
= px_dma(&ppgtt
->pml4
);
927 I915_WRITE(vgtif_reg(pdp
[0].lo
), lower_32_bits(daddr
));
928 I915_WRITE(vgtif_reg(pdp
[0].hi
), upper_32_bits(daddr
));
930 msg
= (create
? VGT_G2V_PPGTT_L4_PAGE_TABLE_CREATE
:
931 VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY
);
933 for (i
= 0; i
< GEN8_LEGACY_PDPES
; i
++) {
934 u64 daddr
= i915_page_dir_dma_addr(ppgtt
, i
);
936 I915_WRITE(vgtif_reg(pdp
[i
].lo
), lower_32_bits(daddr
));
937 I915_WRITE(vgtif_reg(pdp
[i
].hi
), upper_32_bits(daddr
));
940 msg
= (create
? VGT_G2V_PPGTT_L3_PAGE_TABLE_CREATE
:
941 VGT_G2V_PPGTT_L3_PAGE_TABLE_DESTROY
);
944 I915_WRITE(vgtif_reg(g2v_notify
), msg
);
949 static void gen8_free_scratch(struct i915_address_space
*vm
)
951 struct drm_device
*dev
= vm
->dev
;
953 if (USES_FULL_48BIT_PPGTT(dev
))
954 free_pdp(dev
, vm
->scratch_pdp
);
955 free_pd(dev
, vm
->scratch_pd
);
956 free_pt(dev
, vm
->scratch_pt
);
957 cleanup_scratch_page(dev
, &vm
->scratch_page
);
960 static void gen8_ppgtt_cleanup_3lvl(struct drm_device
*dev
,
961 struct i915_page_directory_pointer
*pdp
)
965 for_each_set_bit(i
, pdp
->used_pdpes
, I915_PDPES_PER_PDP(dev
)) {
966 if (WARN_ON(!pdp
->page_directory
[i
]))
969 gen8_free_page_tables(dev
, pdp
->page_directory
[i
]);
970 free_pd(dev
, pdp
->page_directory
[i
]);
976 static void gen8_ppgtt_cleanup_4lvl(struct i915_hw_ppgtt
*ppgtt
)
980 for_each_set_bit(i
, ppgtt
->pml4
.used_pml4es
, GEN8_PML4ES_PER_PML4
) {
981 if (WARN_ON(!ppgtt
->pml4
.pdps
[i
]))
984 gen8_ppgtt_cleanup_3lvl(ppgtt
->base
.dev
, ppgtt
->pml4
.pdps
[i
]);
987 cleanup_px(ppgtt
->base
.dev
, &ppgtt
->pml4
);
990 static void gen8_ppgtt_cleanup(struct i915_address_space
*vm
)
992 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
994 if (intel_vgpu_active(to_i915(vm
->dev
)))
995 gen8_ppgtt_notify_vgt(ppgtt
, false);
997 if (!USES_FULL_48BIT_PPGTT(ppgtt
->base
.dev
))
998 gen8_ppgtt_cleanup_3lvl(ppgtt
->base
.dev
, &ppgtt
->pdp
);
1000 gen8_ppgtt_cleanup_4lvl(ppgtt
);
1002 gen8_free_scratch(vm
);
1006 * gen8_ppgtt_alloc_pagetabs() - Allocate page tables for VA range.
1007 * @vm: Master vm structure.
1008 * @pd: Page directory for this address range.
1009 * @start: Starting virtual address to begin allocations.
1010 * @length: Size of the allocations.
1011 * @new_pts: Bitmap set by function with new allocations. Likely used by the
1012 * caller to free on error.
1014 * Allocate the required number of page tables. Extremely similar to
1015 * gen8_ppgtt_alloc_page_directories(). The main difference is here we are limited by
1016 * the page directory boundary (instead of the page directory pointer). That
1017 * boundary is 1GB virtual. Therefore, unlike gen8_ppgtt_alloc_page_directories(), it is
1018 * possible, and likely that the caller will need to use multiple calls of this
1019 * function to achieve the appropriate allocation.
1021 * Return: 0 if success; negative error code otherwise.
1023 static int gen8_ppgtt_alloc_pagetabs(struct i915_address_space
*vm
,
1024 struct i915_page_directory
*pd
,
1027 unsigned long *new_pts
)
1029 struct drm_device
*dev
= vm
->dev
;
1030 struct i915_page_table
*pt
;
1033 gen8_for_each_pde(pt
, pd
, start
, length
, pde
) {
1034 /* Don't reallocate page tables */
1035 if (test_bit(pde
, pd
->used_pdes
)) {
1036 /* Scratch is never allocated this way */
1037 WARN_ON(pt
== vm
->scratch_pt
);
1045 gen8_initialize_pt(vm
, pt
);
1046 pd
->page_table
[pde
] = pt
;
1047 __set_bit(pde
, new_pts
);
1048 trace_i915_page_table_entry_alloc(vm
, pde
, start
, GEN8_PDE_SHIFT
);
1054 for_each_set_bit(pde
, new_pts
, I915_PDES
)
1055 free_pt(dev
, pd
->page_table
[pde
]);
1061 * gen8_ppgtt_alloc_page_directories() - Allocate page directories for VA range.
1062 * @vm: Master vm structure.
1063 * @pdp: Page directory pointer for this address range.
1064 * @start: Starting virtual address to begin allocations.
1065 * @length: Size of the allocations.
1066 * @new_pds: Bitmap set by function with new allocations. Likely used by the
1067 * caller to free on error.
1069 * Allocate the required number of page directories starting at the pde index of
1070 * @start, and ending at the pde index @start + @length. This function will skip
1071 * over already allocated page directories within the range, and only allocate
1072 * new ones, setting the appropriate pointer within the pdp as well as the
1073 * correct position in the bitmap @new_pds.
1075 * The function will only allocate the pages within the range for a give page
1076 * directory pointer. In other words, if @start + @length straddles a virtually
1077 * addressed PDP boundary (512GB for 4k pages), there will be more allocations
1078 * required by the caller, This is not currently possible, and the BUG in the
1079 * code will prevent it.
1081 * Return: 0 if success; negative error code otherwise.
1084 gen8_ppgtt_alloc_page_directories(struct i915_address_space
*vm
,
1085 struct i915_page_directory_pointer
*pdp
,
1088 unsigned long *new_pds
)
1090 struct drm_device
*dev
= vm
->dev
;
1091 struct i915_page_directory
*pd
;
1093 uint32_t pdpes
= I915_PDPES_PER_PDP(dev
);
1095 WARN_ON(!bitmap_empty(new_pds
, pdpes
));
1097 gen8_for_each_pdpe(pd
, pdp
, start
, length
, pdpe
) {
1098 if (test_bit(pdpe
, pdp
->used_pdpes
))
1105 gen8_initialize_pd(vm
, pd
);
1106 pdp
->page_directory
[pdpe
] = pd
;
1107 __set_bit(pdpe
, new_pds
);
1108 trace_i915_page_directory_entry_alloc(vm
, pdpe
, start
, GEN8_PDPE_SHIFT
);
1114 for_each_set_bit(pdpe
, new_pds
, pdpes
)
1115 free_pd(dev
, pdp
->page_directory
[pdpe
]);
1121 * gen8_ppgtt_alloc_page_dirpointers() - Allocate pdps for VA range.
1122 * @vm: Master vm structure.
1123 * @pml4: Page map level 4 for this address range.
1124 * @start: Starting virtual address to begin allocations.
1125 * @length: Size of the allocations.
1126 * @new_pdps: Bitmap set by function with new allocations. Likely used by the
1127 * caller to free on error.
1129 * Allocate the required number of page directory pointers. Extremely similar to
1130 * gen8_ppgtt_alloc_page_directories() and gen8_ppgtt_alloc_pagetabs().
1131 * The main difference is here we are limited by the pml4 boundary (instead of
1132 * the page directory pointer).
1134 * Return: 0 if success; negative error code otherwise.
1137 gen8_ppgtt_alloc_page_dirpointers(struct i915_address_space
*vm
,
1138 struct i915_pml4
*pml4
,
1141 unsigned long *new_pdps
)
1143 struct drm_device
*dev
= vm
->dev
;
1144 struct i915_page_directory_pointer
*pdp
;
1147 WARN_ON(!bitmap_empty(new_pdps
, GEN8_PML4ES_PER_PML4
));
1149 gen8_for_each_pml4e(pdp
, pml4
, start
, length
, pml4e
) {
1150 if (!test_bit(pml4e
, pml4
->used_pml4es
)) {
1151 pdp
= alloc_pdp(dev
);
1155 gen8_initialize_pdp(vm
, pdp
);
1156 pml4
->pdps
[pml4e
] = pdp
;
1157 __set_bit(pml4e
, new_pdps
);
1158 trace_i915_page_directory_pointer_entry_alloc(vm
,
1168 for_each_set_bit(pml4e
, new_pdps
, GEN8_PML4ES_PER_PML4
)
1169 free_pdp(dev
, pml4
->pdps
[pml4e
]);
1175 free_gen8_temp_bitmaps(unsigned long *new_pds
, unsigned long *new_pts
)
1181 /* Fills in the page directory bitmap, and the array of page tables bitmap. Both
1182 * of these are based on the number of PDPEs in the system.
1185 int __must_check
alloc_gen8_temp_bitmaps(unsigned long **new_pds
,
1186 unsigned long **new_pts
,
1192 pds
= kcalloc(BITS_TO_LONGS(pdpes
), sizeof(unsigned long), GFP_TEMPORARY
);
1196 pts
= kcalloc(pdpes
, BITS_TO_LONGS(I915_PDES
) * sizeof(unsigned long),
1207 free_gen8_temp_bitmaps(pds
, pts
);
1211 /* PDE TLBs are a pain to invalidate on GEN8+. When we modify
1212 * the page table structures, we mark them dirty so that
1213 * context switching/execlist queuing code takes extra steps
1214 * to ensure that tlbs are flushed.
1216 static void mark_tlbs_dirty(struct i915_hw_ppgtt
*ppgtt
)
1218 ppgtt
->pd_dirty_rings
= INTEL_INFO(ppgtt
->base
.dev
)->ring_mask
;
1221 static int gen8_alloc_va_range_3lvl(struct i915_address_space
*vm
,
1222 struct i915_page_directory_pointer
*pdp
,
1226 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
1227 unsigned long *new_page_dirs
, *new_page_tables
;
1228 struct drm_device
*dev
= vm
->dev
;
1229 struct i915_page_directory
*pd
;
1230 const uint64_t orig_start
= start
;
1231 const uint64_t orig_length
= length
;
1233 uint32_t pdpes
= I915_PDPES_PER_PDP(dev
);
1236 /* Wrap is never okay since we can only represent 48b, and we don't
1237 * actually use the other side of the canonical address space.
1239 if (WARN_ON(start
+ length
< start
))
1242 if (WARN_ON(start
+ length
> vm
->total
))
1245 ret
= alloc_gen8_temp_bitmaps(&new_page_dirs
, &new_page_tables
, pdpes
);
1249 /* Do the allocations first so we can easily bail out */
1250 ret
= gen8_ppgtt_alloc_page_directories(vm
, pdp
, start
, length
,
1253 free_gen8_temp_bitmaps(new_page_dirs
, new_page_tables
);
1257 /* For every page directory referenced, allocate page tables */
1258 gen8_for_each_pdpe(pd
, pdp
, start
, length
, pdpe
) {
1259 ret
= gen8_ppgtt_alloc_pagetabs(vm
, pd
, start
, length
,
1260 new_page_tables
+ pdpe
* BITS_TO_LONGS(I915_PDES
));
1266 length
= orig_length
;
1268 /* Allocations have completed successfully, so set the bitmaps, and do
1270 gen8_for_each_pdpe(pd
, pdp
, start
, length
, pdpe
) {
1271 gen8_pde_t
*const page_directory
= kmap_px(pd
);
1272 struct i915_page_table
*pt
;
1273 uint64_t pd_len
= length
;
1274 uint64_t pd_start
= start
;
1277 /* Every pd should be allocated, we just did that above. */
1280 gen8_for_each_pde(pt
, pd
, pd_start
, pd_len
, pde
) {
1281 /* Same reasoning as pd */
1284 WARN_ON(!gen8_pte_count(pd_start
, pd_len
));
1286 /* Set our used ptes within the page table */
1287 bitmap_set(pt
->used_ptes
,
1288 gen8_pte_index(pd_start
),
1289 gen8_pte_count(pd_start
, pd_len
));
1291 /* Our pde is now pointing to the pagetable, pt */
1292 __set_bit(pde
, pd
->used_pdes
);
1294 /* Map the PDE to the page table */
1295 page_directory
[pde
] = gen8_pde_encode(px_dma(pt
),
1297 trace_i915_page_table_entry_map(&ppgtt
->base
, pde
, pt
,
1298 gen8_pte_index(start
),
1299 gen8_pte_count(start
, length
),
1302 /* NB: We haven't yet mapped ptes to pages. At this
1303 * point we're still relying on insert_entries() */
1306 kunmap_px(ppgtt
, page_directory
);
1307 __set_bit(pdpe
, pdp
->used_pdpes
);
1308 gen8_setup_page_directory(ppgtt
, pdp
, pd
, pdpe
);
1311 free_gen8_temp_bitmaps(new_page_dirs
, new_page_tables
);
1312 mark_tlbs_dirty(ppgtt
);
1319 for_each_set_bit(temp
, new_page_tables
+ pdpe
*
1320 BITS_TO_LONGS(I915_PDES
), I915_PDES
)
1321 free_pt(dev
, pdp
->page_directory
[pdpe
]->page_table
[temp
]);
1324 for_each_set_bit(pdpe
, new_page_dirs
, pdpes
)
1325 free_pd(dev
, pdp
->page_directory
[pdpe
]);
1327 free_gen8_temp_bitmaps(new_page_dirs
, new_page_tables
);
1328 mark_tlbs_dirty(ppgtt
);
1332 static int gen8_alloc_va_range_4lvl(struct i915_address_space
*vm
,
1333 struct i915_pml4
*pml4
,
1337 DECLARE_BITMAP(new_pdps
, GEN8_PML4ES_PER_PML4
);
1338 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
1339 struct i915_page_directory_pointer
*pdp
;
1343 /* Do the pml4 allocations first, so we don't need to track the newly
1344 * allocated tables below the pdp */
1345 bitmap_zero(new_pdps
, GEN8_PML4ES_PER_PML4
);
1347 /* The pagedirectory and pagetable allocations are done in the shared 3
1348 * and 4 level code. Just allocate the pdps.
1350 ret
= gen8_ppgtt_alloc_page_dirpointers(vm
, pml4
, start
, length
,
1355 WARN(bitmap_weight(new_pdps
, GEN8_PML4ES_PER_PML4
) > 2,
1356 "The allocation has spanned more than 512GB. "
1357 "It is highly likely this is incorrect.");
1359 gen8_for_each_pml4e(pdp
, pml4
, start
, length
, pml4e
) {
1362 ret
= gen8_alloc_va_range_3lvl(vm
, pdp
, start
, length
);
1366 gen8_setup_page_directory_pointer(ppgtt
, pml4
, pdp
, pml4e
);
1369 bitmap_or(pml4
->used_pml4es
, new_pdps
, pml4
->used_pml4es
,
1370 GEN8_PML4ES_PER_PML4
);
1375 for_each_set_bit(pml4e
, new_pdps
, GEN8_PML4ES_PER_PML4
)
1376 gen8_ppgtt_cleanup_3lvl(vm
->dev
, pml4
->pdps
[pml4e
]);
1381 static int gen8_alloc_va_range(struct i915_address_space
*vm
,
1382 uint64_t start
, uint64_t length
)
1384 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
1386 if (USES_FULL_48BIT_PPGTT(vm
->dev
))
1387 return gen8_alloc_va_range_4lvl(vm
, &ppgtt
->pml4
, start
, length
);
1389 return gen8_alloc_va_range_3lvl(vm
, &ppgtt
->pdp
, start
, length
);
1392 static void gen8_dump_pdp(struct i915_page_directory_pointer
*pdp
,
1393 uint64_t start
, uint64_t length
,
1394 gen8_pte_t scratch_pte
,
1397 struct i915_page_directory
*pd
;
1400 gen8_for_each_pdpe(pd
, pdp
, start
, length
, pdpe
) {
1401 struct i915_page_table
*pt
;
1402 uint64_t pd_len
= length
;
1403 uint64_t pd_start
= start
;
1406 if (!test_bit(pdpe
, pdp
->used_pdpes
))
1409 seq_printf(m
, "\tPDPE #%d\n", pdpe
);
1410 gen8_for_each_pde(pt
, pd
, pd_start
, pd_len
, pde
) {
1412 gen8_pte_t
*pt_vaddr
;
1414 if (!test_bit(pde
, pd
->used_pdes
))
1417 pt_vaddr
= kmap_px(pt
);
1418 for (pte
= 0; pte
< GEN8_PTES
; pte
+= 4) {
1420 (pdpe
<< GEN8_PDPE_SHIFT
) |
1421 (pde
<< GEN8_PDE_SHIFT
) |
1422 (pte
<< GEN8_PTE_SHIFT
);
1426 for (i
= 0; i
< 4; i
++)
1427 if (pt_vaddr
[pte
+ i
] != scratch_pte
)
1432 seq_printf(m
, "\t\t0x%llx [%03d,%03d,%04d]: =", va
, pdpe
, pde
, pte
);
1433 for (i
= 0; i
< 4; i
++) {
1434 if (pt_vaddr
[pte
+ i
] != scratch_pte
)
1435 seq_printf(m
, " %llx", pt_vaddr
[pte
+ i
]);
1437 seq_puts(m
, " SCRATCH ");
1441 /* don't use kunmap_px, it could trigger
1442 * an unnecessary flush.
1444 kunmap_atomic(pt_vaddr
);
1449 static void gen8_dump_ppgtt(struct i915_hw_ppgtt
*ppgtt
, struct seq_file
*m
)
1451 struct i915_address_space
*vm
= &ppgtt
->base
;
1452 uint64_t start
= ppgtt
->base
.start
;
1453 uint64_t length
= ppgtt
->base
.total
;
1454 gen8_pte_t scratch_pte
= gen8_pte_encode(vm
->scratch_page
.daddr
,
1455 I915_CACHE_LLC
, true);
1457 if (!USES_FULL_48BIT_PPGTT(vm
->dev
)) {
1458 gen8_dump_pdp(&ppgtt
->pdp
, start
, length
, scratch_pte
, m
);
1461 struct i915_pml4
*pml4
= &ppgtt
->pml4
;
1462 struct i915_page_directory_pointer
*pdp
;
1464 gen8_for_each_pml4e(pdp
, pml4
, start
, length
, pml4e
) {
1465 if (!test_bit(pml4e
, pml4
->used_pml4es
))
1468 seq_printf(m
, " PML4E #%llu\n", pml4e
);
1469 gen8_dump_pdp(pdp
, start
, length
, scratch_pte
, m
);
1474 static int gen8_preallocate_top_level_pdps(struct i915_hw_ppgtt
*ppgtt
)
1476 unsigned long *new_page_dirs
, *new_page_tables
;
1477 uint32_t pdpes
= I915_PDPES_PER_PDP(dev
);
1480 /* We allocate temp bitmap for page tables for no gain
1481 * but as this is for init only, lets keep the things simple
1483 ret
= alloc_gen8_temp_bitmaps(&new_page_dirs
, &new_page_tables
, pdpes
);
1487 /* Allocate for all pdps regardless of how the ppgtt
1490 ret
= gen8_ppgtt_alloc_page_directories(&ppgtt
->base
, &ppgtt
->pdp
,
1494 *ppgtt
->pdp
.used_pdpes
= *new_page_dirs
;
1496 free_gen8_temp_bitmaps(new_page_dirs
, new_page_tables
);
1502 * GEN8 legacy ppgtt programming is accomplished through a max 4 PDP registers
1503 * with a net effect resembling a 2-level page table in normal x86 terms. Each
1504 * PDP represents 1GB of memory 4 * 512 * 512 * 4096 = 4GB legacy 32b address
1508 static int gen8_ppgtt_init(struct i915_hw_ppgtt
*ppgtt
)
1512 ret
= gen8_init_scratch(&ppgtt
->base
);
1516 ppgtt
->base
.start
= 0;
1517 ppgtt
->base
.cleanup
= gen8_ppgtt_cleanup
;
1518 ppgtt
->base
.allocate_va_range
= gen8_alloc_va_range
;
1519 ppgtt
->base
.insert_entries
= gen8_ppgtt_insert_entries
;
1520 ppgtt
->base
.clear_range
= gen8_ppgtt_clear_range
;
1521 ppgtt
->base
.unbind_vma
= ppgtt_unbind_vma
;
1522 ppgtt
->base
.bind_vma
= ppgtt_bind_vma
;
1523 ppgtt
->debug_dump
= gen8_dump_ppgtt
;
1525 if (USES_FULL_48BIT_PPGTT(ppgtt
->base
.dev
)) {
1526 ret
= setup_px(ppgtt
->base
.dev
, &ppgtt
->pml4
);
1530 gen8_initialize_pml4(&ppgtt
->base
, &ppgtt
->pml4
);
1532 ppgtt
->base
.total
= 1ULL << 48;
1533 ppgtt
->switch_mm
= gen8_48b_mm_switch
;
1535 ret
= __pdp_init(ppgtt
->base
.dev
, &ppgtt
->pdp
);
1539 ppgtt
->base
.total
= 1ULL << 32;
1540 ppgtt
->switch_mm
= gen8_legacy_mm_switch
;
1541 trace_i915_page_directory_pointer_entry_alloc(&ppgtt
->base
,
1545 if (intel_vgpu_active(to_i915(ppgtt
->base
.dev
))) {
1546 ret
= gen8_preallocate_top_level_pdps(ppgtt
);
1552 if (intel_vgpu_active(to_i915(ppgtt
->base
.dev
)))
1553 gen8_ppgtt_notify_vgt(ppgtt
, true);
1558 gen8_free_scratch(&ppgtt
->base
);
1562 static void gen6_dump_ppgtt(struct i915_hw_ppgtt
*ppgtt
, struct seq_file
*m
)
1564 struct i915_address_space
*vm
= &ppgtt
->base
;
1565 struct i915_page_table
*unused
;
1566 gen6_pte_t scratch_pte
;
1569 uint32_t start
= ppgtt
->base
.start
, length
= ppgtt
->base
.total
;
1571 scratch_pte
= vm
->pte_encode(vm
->scratch_page
.daddr
,
1572 I915_CACHE_LLC
, true, 0);
1574 gen6_for_each_pde(unused
, &ppgtt
->pd
, start
, length
, pde
) {
1576 gen6_pte_t
*pt_vaddr
;
1577 const dma_addr_t pt_addr
= px_dma(ppgtt
->pd
.page_table
[pde
]);
1578 pd_entry
= readl(ppgtt
->pd_addr
+ pde
);
1579 expected
= (GEN6_PDE_ADDR_ENCODE(pt_addr
) | GEN6_PDE_VALID
);
1581 if (pd_entry
!= expected
)
1582 seq_printf(m
, "\tPDE #%d mismatch: Actual PDE: %x Expected PDE: %x\n",
1586 seq_printf(m
, "\tPDE: %x\n", pd_entry
);
1588 pt_vaddr
= kmap_px(ppgtt
->pd
.page_table
[pde
]);
1590 for (pte
= 0; pte
< GEN6_PTES
; pte
+=4) {
1592 (pde
* PAGE_SIZE
* GEN6_PTES
) +
1596 for (i
= 0; i
< 4; i
++)
1597 if (pt_vaddr
[pte
+ i
] != scratch_pte
)
1602 seq_printf(m
, "\t\t0x%lx [%03d,%04d]: =", va
, pde
, pte
);
1603 for (i
= 0; i
< 4; i
++) {
1604 if (pt_vaddr
[pte
+ i
] != scratch_pte
)
1605 seq_printf(m
, " %08x", pt_vaddr
[pte
+ i
]);
1607 seq_puts(m
, " SCRATCH ");
1611 kunmap_px(ppgtt
, pt_vaddr
);
1615 /* Write pde (index) from the page directory @pd to the page table @pt */
1616 static void gen6_write_pde(struct i915_page_directory
*pd
,
1617 const int pde
, struct i915_page_table
*pt
)
1619 /* Caller needs to make sure the write completes if necessary */
1620 struct i915_hw_ppgtt
*ppgtt
=
1621 container_of(pd
, struct i915_hw_ppgtt
, pd
);
1624 pd_entry
= GEN6_PDE_ADDR_ENCODE(px_dma(pt
));
1625 pd_entry
|= GEN6_PDE_VALID
;
1627 writel(pd_entry
, ppgtt
->pd_addr
+ pde
);
1630 /* Write all the page tables found in the ppgtt structure to incrementing page
1632 static void gen6_write_page_range(struct drm_i915_private
*dev_priv
,
1633 struct i915_page_directory
*pd
,
1634 uint32_t start
, uint32_t length
)
1636 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
1637 struct i915_page_table
*pt
;
1640 gen6_for_each_pde(pt
, pd
, start
, length
, pde
)
1641 gen6_write_pde(pd
, pde
, pt
);
1643 /* Make sure write is complete before other code can use this page
1644 * table. Also require for WC mapped PTEs */
1648 static uint32_t get_pd_offset(struct i915_hw_ppgtt
*ppgtt
)
1650 BUG_ON(ppgtt
->pd
.base
.ggtt_offset
& 0x3f);
1652 return (ppgtt
->pd
.base
.ggtt_offset
/ 64) << 16;
1655 static int hsw_mm_switch(struct i915_hw_ppgtt
*ppgtt
,
1656 struct drm_i915_gem_request
*req
)
1658 struct intel_ring
*ring
= req
->ring
;
1659 struct intel_engine_cs
*engine
= req
->engine
;
1662 /* NB: TLBs must be flushed and invalidated before a switch */
1663 ret
= engine
->emit_flush(req
, EMIT_INVALIDATE
| EMIT_FLUSH
);
1667 ret
= intel_ring_begin(req
, 6);
1671 intel_ring_emit(ring
, MI_LOAD_REGISTER_IMM(2));
1672 intel_ring_emit_reg(ring
, RING_PP_DIR_DCLV(engine
));
1673 intel_ring_emit(ring
, PP_DIR_DCLV_2G
);
1674 intel_ring_emit_reg(ring
, RING_PP_DIR_BASE(engine
));
1675 intel_ring_emit(ring
, get_pd_offset(ppgtt
));
1676 intel_ring_emit(ring
, MI_NOOP
);
1677 intel_ring_advance(ring
);
1682 static int gen7_mm_switch(struct i915_hw_ppgtt
*ppgtt
,
1683 struct drm_i915_gem_request
*req
)
1685 struct intel_ring
*ring
= req
->ring
;
1686 struct intel_engine_cs
*engine
= req
->engine
;
1689 /* NB: TLBs must be flushed and invalidated before a switch */
1690 ret
= engine
->emit_flush(req
, EMIT_INVALIDATE
| EMIT_FLUSH
);
1694 ret
= intel_ring_begin(req
, 6);
1698 intel_ring_emit(ring
, MI_LOAD_REGISTER_IMM(2));
1699 intel_ring_emit_reg(ring
, RING_PP_DIR_DCLV(engine
));
1700 intel_ring_emit(ring
, PP_DIR_DCLV_2G
);
1701 intel_ring_emit_reg(ring
, RING_PP_DIR_BASE(engine
));
1702 intel_ring_emit(ring
, get_pd_offset(ppgtt
));
1703 intel_ring_emit(ring
, MI_NOOP
);
1704 intel_ring_advance(ring
);
1706 /* XXX: RCS is the only one to auto invalidate the TLBs? */
1707 if (engine
->id
!= RCS
) {
1708 ret
= engine
->emit_flush(req
, EMIT_INVALIDATE
| EMIT_FLUSH
);
1716 static int gen6_mm_switch(struct i915_hw_ppgtt
*ppgtt
,
1717 struct drm_i915_gem_request
*req
)
1719 struct intel_engine_cs
*engine
= req
->engine
;
1720 struct drm_i915_private
*dev_priv
= req
->i915
;
1722 I915_WRITE(RING_PP_DIR_DCLV(engine
), PP_DIR_DCLV_2G
);
1723 I915_WRITE(RING_PP_DIR_BASE(engine
), get_pd_offset(ppgtt
));
1727 static void gen8_ppgtt_enable(struct drm_device
*dev
)
1729 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1730 struct intel_engine_cs
*engine
;
1732 for_each_engine(engine
, dev_priv
) {
1733 u32 four_level
= USES_FULL_48BIT_PPGTT(dev
) ? GEN8_GFX_PPGTT_48B
: 0;
1734 I915_WRITE(RING_MODE_GEN7(engine
),
1735 _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE
| four_level
));
1739 static void gen7_ppgtt_enable(struct drm_device
*dev
)
1741 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1742 struct intel_engine_cs
*engine
;
1743 uint32_t ecochk
, ecobits
;
1745 ecobits
= I915_READ(GAC_ECO_BITS
);
1746 I915_WRITE(GAC_ECO_BITS
, ecobits
| ECOBITS_PPGTT_CACHE64B
);
1748 ecochk
= I915_READ(GAM_ECOCHK
);
1749 if (IS_HASWELL(dev
)) {
1750 ecochk
|= ECOCHK_PPGTT_WB_HSW
;
1752 ecochk
|= ECOCHK_PPGTT_LLC_IVB
;
1753 ecochk
&= ~ECOCHK_PPGTT_GFDT_IVB
;
1755 I915_WRITE(GAM_ECOCHK
, ecochk
);
1757 for_each_engine(engine
, dev_priv
) {
1758 /* GFX_MODE is per-ring on gen7+ */
1759 I915_WRITE(RING_MODE_GEN7(engine
),
1760 _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE
));
1764 static void gen6_ppgtt_enable(struct drm_device
*dev
)
1766 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1767 uint32_t ecochk
, gab_ctl
, ecobits
;
1769 ecobits
= I915_READ(GAC_ECO_BITS
);
1770 I915_WRITE(GAC_ECO_BITS
, ecobits
| ECOBITS_SNB_BIT
|
1771 ECOBITS_PPGTT_CACHE64B
);
1773 gab_ctl
= I915_READ(GAB_CTL
);
1774 I915_WRITE(GAB_CTL
, gab_ctl
| GAB_CTL_CONT_AFTER_PAGEFAULT
);
1776 ecochk
= I915_READ(GAM_ECOCHK
);
1777 I915_WRITE(GAM_ECOCHK
, ecochk
| ECOCHK_SNB_BIT
| ECOCHK_PPGTT_CACHE64B
);
1779 I915_WRITE(GFX_MODE
, _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE
));
1782 /* PPGTT support for Sandybdrige/Gen6 and later */
1783 static void gen6_ppgtt_clear_range(struct i915_address_space
*vm
,
1788 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
1789 gen6_pte_t
*pt_vaddr
, scratch_pte
;
1790 unsigned first_entry
= start
>> PAGE_SHIFT
;
1791 unsigned num_entries
= length
>> PAGE_SHIFT
;
1792 unsigned act_pt
= first_entry
/ GEN6_PTES
;
1793 unsigned first_pte
= first_entry
% GEN6_PTES
;
1794 unsigned last_pte
, i
;
1796 scratch_pte
= vm
->pte_encode(vm
->scratch_page
.daddr
,
1797 I915_CACHE_LLC
, true, 0);
1799 while (num_entries
) {
1800 last_pte
= first_pte
+ num_entries
;
1801 if (last_pte
> GEN6_PTES
)
1802 last_pte
= GEN6_PTES
;
1804 pt_vaddr
= kmap_px(ppgtt
->pd
.page_table
[act_pt
]);
1806 for (i
= first_pte
; i
< last_pte
; i
++)
1807 pt_vaddr
[i
] = scratch_pte
;
1809 kunmap_px(ppgtt
, pt_vaddr
);
1811 num_entries
-= last_pte
- first_pte
;
1817 static void gen6_ppgtt_insert_entries(struct i915_address_space
*vm
,
1818 struct sg_table
*pages
,
1820 enum i915_cache_level cache_level
, u32 flags
)
1822 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
1823 unsigned first_entry
= start
>> PAGE_SHIFT
;
1824 unsigned act_pt
= first_entry
/ GEN6_PTES
;
1825 unsigned act_pte
= first_entry
% GEN6_PTES
;
1826 gen6_pte_t
*pt_vaddr
= NULL
;
1827 struct sgt_iter sgt_iter
;
1830 for_each_sgt_dma(addr
, sgt_iter
, pages
) {
1831 if (pt_vaddr
== NULL
)
1832 pt_vaddr
= kmap_px(ppgtt
->pd
.page_table
[act_pt
]);
1835 vm
->pte_encode(addr
, cache_level
, true, flags
);
1837 if (++act_pte
== GEN6_PTES
) {
1838 kunmap_px(ppgtt
, pt_vaddr
);
1846 kunmap_px(ppgtt
, pt_vaddr
);
1849 static int gen6_alloc_va_range(struct i915_address_space
*vm
,
1850 uint64_t start_in
, uint64_t length_in
)
1852 DECLARE_BITMAP(new_page_tables
, I915_PDES
);
1853 struct drm_device
*dev
= vm
->dev
;
1854 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1855 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
1856 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
1857 struct i915_page_table
*pt
;
1858 uint32_t start
, length
, start_save
, length_save
;
1862 if (WARN_ON(start_in
+ length_in
> ppgtt
->base
.total
))
1865 start
= start_save
= start_in
;
1866 length
= length_save
= length_in
;
1868 bitmap_zero(new_page_tables
, I915_PDES
);
1870 /* The allocation is done in two stages so that we can bail out with
1871 * minimal amount of pain. The first stage finds new page tables that
1872 * need allocation. The second stage marks use ptes within the page
1875 gen6_for_each_pde(pt
, &ppgtt
->pd
, start
, length
, pde
) {
1876 if (pt
!= vm
->scratch_pt
) {
1877 WARN_ON(bitmap_empty(pt
->used_ptes
, GEN6_PTES
));
1881 /* We've already allocated a page table */
1882 WARN_ON(!bitmap_empty(pt
->used_ptes
, GEN6_PTES
));
1890 gen6_initialize_pt(vm
, pt
);
1892 ppgtt
->pd
.page_table
[pde
] = pt
;
1893 __set_bit(pde
, new_page_tables
);
1894 trace_i915_page_table_entry_alloc(vm
, pde
, start
, GEN6_PDE_SHIFT
);
1898 length
= length_save
;
1900 gen6_for_each_pde(pt
, &ppgtt
->pd
, start
, length
, pde
) {
1901 DECLARE_BITMAP(tmp_bitmap
, GEN6_PTES
);
1903 bitmap_zero(tmp_bitmap
, GEN6_PTES
);
1904 bitmap_set(tmp_bitmap
, gen6_pte_index(start
),
1905 gen6_pte_count(start
, length
));
1907 if (__test_and_clear_bit(pde
, new_page_tables
))
1908 gen6_write_pde(&ppgtt
->pd
, pde
, pt
);
1910 trace_i915_page_table_entry_map(vm
, pde
, pt
,
1911 gen6_pte_index(start
),
1912 gen6_pte_count(start
, length
),
1914 bitmap_or(pt
->used_ptes
, tmp_bitmap
, pt
->used_ptes
,
1918 WARN_ON(!bitmap_empty(new_page_tables
, I915_PDES
));
1920 /* Make sure write is complete before other code can use this page
1921 * table. Also require for WC mapped PTEs */
1924 mark_tlbs_dirty(ppgtt
);
1928 for_each_set_bit(pde
, new_page_tables
, I915_PDES
) {
1929 struct i915_page_table
*pt
= ppgtt
->pd
.page_table
[pde
];
1931 ppgtt
->pd
.page_table
[pde
] = vm
->scratch_pt
;
1932 free_pt(vm
->dev
, pt
);
1935 mark_tlbs_dirty(ppgtt
);
1939 static int gen6_init_scratch(struct i915_address_space
*vm
)
1941 struct drm_device
*dev
= vm
->dev
;
1944 ret
= setup_scratch_page(dev
, &vm
->scratch_page
, I915_GFP_DMA
);
1948 vm
->scratch_pt
= alloc_pt(dev
);
1949 if (IS_ERR(vm
->scratch_pt
)) {
1950 cleanup_scratch_page(dev
, &vm
->scratch_page
);
1951 return PTR_ERR(vm
->scratch_pt
);
1954 gen6_initialize_pt(vm
, vm
->scratch_pt
);
1959 static void gen6_free_scratch(struct i915_address_space
*vm
)
1961 struct drm_device
*dev
= vm
->dev
;
1963 free_pt(dev
, vm
->scratch_pt
);
1964 cleanup_scratch_page(dev
, &vm
->scratch_page
);
1967 static void gen6_ppgtt_cleanup(struct i915_address_space
*vm
)
1969 struct i915_hw_ppgtt
*ppgtt
= i915_vm_to_ppgtt(vm
);
1970 struct i915_page_directory
*pd
= &ppgtt
->pd
;
1971 struct drm_device
*dev
= vm
->dev
;
1972 struct i915_page_table
*pt
;
1975 drm_mm_remove_node(&ppgtt
->node
);
1977 gen6_for_all_pdes(pt
, pd
, pde
)
1978 if (pt
!= vm
->scratch_pt
)
1981 gen6_free_scratch(vm
);
1984 static int gen6_ppgtt_allocate_page_directories(struct i915_hw_ppgtt
*ppgtt
)
1986 struct i915_address_space
*vm
= &ppgtt
->base
;
1987 struct drm_device
*dev
= ppgtt
->base
.dev
;
1988 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1989 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
1990 bool retried
= false;
1993 /* PPGTT PDEs reside in the GGTT and consists of 512 entries. The
1994 * allocator works in address space sizes, so it's multiplied by page
1995 * size. We allocate at the top of the GTT to avoid fragmentation.
1997 BUG_ON(!drm_mm_initialized(&ggtt
->base
.mm
));
1999 ret
= gen6_init_scratch(vm
);
2004 ret
= drm_mm_insert_node_in_range_generic(&ggtt
->base
.mm
,
2005 &ppgtt
->node
, GEN6_PD_SIZE
,
2007 0, ggtt
->base
.total
,
2009 if (ret
== -ENOSPC
&& !retried
) {
2010 ret
= i915_gem_evict_something(&ggtt
->base
,
2011 GEN6_PD_SIZE
, GEN6_PD_ALIGN
,
2013 0, ggtt
->base
.total
,
2026 if (ppgtt
->node
.start
< ggtt
->mappable_end
)
2027 DRM_DEBUG("Forced to use aperture for PDEs\n");
2032 gen6_free_scratch(vm
);
2036 static int gen6_ppgtt_alloc(struct i915_hw_ppgtt
*ppgtt
)
2038 return gen6_ppgtt_allocate_page_directories(ppgtt
);
2041 static void gen6_scratch_va_range(struct i915_hw_ppgtt
*ppgtt
,
2042 uint64_t start
, uint64_t length
)
2044 struct i915_page_table
*unused
;
2047 gen6_for_each_pde(unused
, &ppgtt
->pd
, start
, length
, pde
)
2048 ppgtt
->pd
.page_table
[pde
] = ppgtt
->base
.scratch_pt
;
2051 static int gen6_ppgtt_init(struct i915_hw_ppgtt
*ppgtt
)
2053 struct drm_device
*dev
= ppgtt
->base
.dev
;
2054 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2055 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
2058 ppgtt
->base
.pte_encode
= ggtt
->base
.pte_encode
;
2059 if (intel_vgpu_active(dev_priv
) || IS_GEN6(dev
))
2060 ppgtt
->switch_mm
= gen6_mm_switch
;
2061 else if (IS_HASWELL(dev
))
2062 ppgtt
->switch_mm
= hsw_mm_switch
;
2063 else if (IS_GEN7(dev
))
2064 ppgtt
->switch_mm
= gen7_mm_switch
;
2068 ret
= gen6_ppgtt_alloc(ppgtt
);
2072 ppgtt
->base
.allocate_va_range
= gen6_alloc_va_range
;
2073 ppgtt
->base
.clear_range
= gen6_ppgtt_clear_range
;
2074 ppgtt
->base
.insert_entries
= gen6_ppgtt_insert_entries
;
2075 ppgtt
->base
.unbind_vma
= ppgtt_unbind_vma
;
2076 ppgtt
->base
.bind_vma
= ppgtt_bind_vma
;
2077 ppgtt
->base
.cleanup
= gen6_ppgtt_cleanup
;
2078 ppgtt
->base
.start
= 0;
2079 ppgtt
->base
.total
= I915_PDES
* GEN6_PTES
* PAGE_SIZE
;
2080 ppgtt
->debug_dump
= gen6_dump_ppgtt
;
2082 ppgtt
->pd
.base
.ggtt_offset
=
2083 ppgtt
->node
.start
/ PAGE_SIZE
* sizeof(gen6_pte_t
);
2085 ppgtt
->pd_addr
= (gen6_pte_t __iomem
*)ggtt
->gsm
+
2086 ppgtt
->pd
.base
.ggtt_offset
/ sizeof(gen6_pte_t
);
2088 gen6_scratch_va_range(ppgtt
, 0, ppgtt
->base
.total
);
2090 gen6_write_page_range(dev_priv
, &ppgtt
->pd
, 0, ppgtt
->base
.total
);
2092 DRM_DEBUG_DRIVER("Allocated pde space (%lldM) at GTT entry: %llx\n",
2093 ppgtt
->node
.size
>> 20,
2094 ppgtt
->node
.start
/ PAGE_SIZE
);
2096 DRM_DEBUG("Adding PPGTT at offset %x\n",
2097 ppgtt
->pd
.base
.ggtt_offset
<< 10);
2102 static int __hw_ppgtt_init(struct i915_hw_ppgtt
*ppgtt
,
2103 struct drm_i915_private
*dev_priv
)
2105 ppgtt
->base
.dev
= &dev_priv
->drm
;
2107 if (INTEL_INFO(dev_priv
)->gen
< 8)
2108 return gen6_ppgtt_init(ppgtt
);
2110 return gen8_ppgtt_init(ppgtt
);
2113 static void i915_address_space_init(struct i915_address_space
*vm
,
2114 struct drm_i915_private
*dev_priv
)
2116 drm_mm_init(&vm
->mm
, vm
->start
, vm
->total
);
2117 INIT_LIST_HEAD(&vm
->active_list
);
2118 INIT_LIST_HEAD(&vm
->inactive_list
);
2119 INIT_LIST_HEAD(&vm
->unbound_list
);
2120 list_add_tail(&vm
->global_link
, &dev_priv
->vm_list
);
2123 static void gtt_write_workarounds(struct drm_device
*dev
)
2125 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2127 /* This function is for gtt related workarounds. This function is
2128 * called on driver load and after a GPU reset, so you can place
2129 * workarounds here even if they get overwritten by GPU reset.
2131 /* WaIncreaseDefaultTLBEntries:chv,bdw,skl,bxt */
2132 if (IS_BROADWELL(dev
))
2133 I915_WRITE(GEN8_L3_LRA_1_GPGPU
, GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_BDW
);
2134 else if (IS_CHERRYVIEW(dev
))
2135 I915_WRITE(GEN8_L3_LRA_1_GPGPU
, GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_CHV
);
2136 else if (IS_SKYLAKE(dev
))
2137 I915_WRITE(GEN8_L3_LRA_1_GPGPU
, GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_SKL
);
2138 else if (IS_BROXTON(dev
))
2139 I915_WRITE(GEN8_L3_LRA_1_GPGPU
, GEN9_L3_LRA_1_GPGPU_DEFAULT_VALUE_BXT
);
2142 static int i915_ppgtt_init(struct i915_hw_ppgtt
*ppgtt
,
2143 struct drm_i915_private
*dev_priv
,
2144 struct drm_i915_file_private
*file_priv
)
2148 ret
= __hw_ppgtt_init(ppgtt
, dev_priv
);
2150 kref_init(&ppgtt
->ref
);
2151 i915_address_space_init(&ppgtt
->base
, dev_priv
);
2152 ppgtt
->base
.file
= file_priv
;
2158 int i915_ppgtt_init_hw(struct drm_device
*dev
)
2160 gtt_write_workarounds(dev
);
2162 /* In the case of execlists, PPGTT is enabled by the context descriptor
2163 * and the PDPs are contained within the context itself. We don't
2164 * need to do anything here. */
2165 if (i915
.enable_execlists
)
2168 if (!USES_PPGTT(dev
))
2172 gen6_ppgtt_enable(dev
);
2173 else if (IS_GEN7(dev
))
2174 gen7_ppgtt_enable(dev
);
2175 else if (INTEL_INFO(dev
)->gen
>= 8)
2176 gen8_ppgtt_enable(dev
);
2178 MISSING_CASE(INTEL_INFO(dev
)->gen
);
2183 struct i915_hw_ppgtt
*
2184 i915_ppgtt_create(struct drm_i915_private
*dev_priv
,
2185 struct drm_i915_file_private
*fpriv
)
2187 struct i915_hw_ppgtt
*ppgtt
;
2190 ppgtt
= kzalloc(sizeof(*ppgtt
), GFP_KERNEL
);
2192 return ERR_PTR(-ENOMEM
);
2194 ret
= i915_ppgtt_init(ppgtt
, dev_priv
, fpriv
);
2197 return ERR_PTR(ret
);
2200 trace_i915_ppgtt_create(&ppgtt
->base
);
2205 void i915_ppgtt_release(struct kref
*kref
)
2207 struct i915_hw_ppgtt
*ppgtt
=
2208 container_of(kref
, struct i915_hw_ppgtt
, ref
);
2210 trace_i915_ppgtt_release(&ppgtt
->base
);
2212 /* vmas should already be unbound and destroyed */
2213 WARN_ON(!list_empty(&ppgtt
->base
.active_list
));
2214 WARN_ON(!list_empty(&ppgtt
->base
.inactive_list
));
2215 WARN_ON(!list_empty(&ppgtt
->base
.unbound_list
));
2217 list_del(&ppgtt
->base
.global_link
);
2218 drm_mm_takedown(&ppgtt
->base
.mm
);
2220 ppgtt
->base
.cleanup(&ppgtt
->base
);
2224 /* Certain Gen5 chipsets require require idling the GPU before
2225 * unmapping anything from the GTT when VT-d is enabled.
2227 static bool needs_idle_maps(struct drm_i915_private
*dev_priv
)
2229 #ifdef CONFIG_INTEL_IOMMU
2230 /* Query intel_iommu to see if we need the workaround. Presumably that
2233 if (IS_GEN5(dev_priv
) && IS_MOBILE(dev_priv
) && intel_iommu_gfx_mapped
)
2239 void i915_check_and_clear_faults(struct drm_i915_private
*dev_priv
)
2241 struct intel_engine_cs
*engine
;
2243 if (INTEL_INFO(dev_priv
)->gen
< 6)
2246 for_each_engine(engine
, dev_priv
) {
2248 fault_reg
= I915_READ(RING_FAULT_REG(engine
));
2249 if (fault_reg
& RING_FAULT_VALID
) {
2250 DRM_DEBUG_DRIVER("Unexpected fault\n"
2252 "\tAddress space: %s\n"
2255 fault_reg
& PAGE_MASK
,
2256 fault_reg
& RING_FAULT_GTTSEL_MASK
? "GGTT" : "PPGTT",
2257 RING_FAULT_SRCID(fault_reg
),
2258 RING_FAULT_FAULT_TYPE(fault_reg
));
2259 I915_WRITE(RING_FAULT_REG(engine
),
2260 fault_reg
& ~RING_FAULT_VALID
);
2263 POSTING_READ(RING_FAULT_REG(&dev_priv
->engine
[RCS
]));
2266 static void i915_ggtt_flush(struct drm_i915_private
*dev_priv
)
2268 if (INTEL_INFO(dev_priv
)->gen
< 6) {
2269 intel_gtt_chipset_flush();
2271 I915_WRITE(GFX_FLSH_CNTL_GEN6
, GFX_FLSH_CNTL_EN
);
2272 POSTING_READ(GFX_FLSH_CNTL_GEN6
);
2276 void i915_gem_suspend_gtt_mappings(struct drm_device
*dev
)
2278 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2279 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
2281 /* Don't bother messing with faults pre GEN6 as we have little
2282 * documentation supporting that it's a good idea.
2284 if (INTEL_INFO(dev
)->gen
< 6)
2287 i915_check_and_clear_faults(dev_priv
);
2289 ggtt
->base
.clear_range(&ggtt
->base
, ggtt
->base
.start
, ggtt
->base
.total
,
2292 i915_ggtt_flush(dev_priv
);
2295 int i915_gem_gtt_prepare_object(struct drm_i915_gem_object
*obj
)
2297 if (!dma_map_sg(&obj
->base
.dev
->pdev
->dev
,
2298 obj
->pages
->sgl
, obj
->pages
->nents
,
2299 PCI_DMA_BIDIRECTIONAL
))
2305 static void gen8_set_pte(void __iomem
*addr
, gen8_pte_t pte
)
2310 static void gen8_ggtt_insert_page(struct i915_address_space
*vm
,
2313 enum i915_cache_level level
,
2316 struct drm_i915_private
*dev_priv
= to_i915(vm
->dev
);
2317 gen8_pte_t __iomem
*pte
=
2318 (gen8_pte_t __iomem
*)dev_priv
->ggtt
.gsm
+
2319 (offset
>> PAGE_SHIFT
);
2322 rpm_atomic_seq
= assert_rpm_atomic_begin(dev_priv
);
2324 gen8_set_pte(pte
, gen8_pte_encode(addr
, level
, true));
2326 I915_WRITE(GFX_FLSH_CNTL_GEN6
, GFX_FLSH_CNTL_EN
);
2327 POSTING_READ(GFX_FLSH_CNTL_GEN6
);
2329 assert_rpm_atomic_end(dev_priv
, rpm_atomic_seq
);
2332 static void gen8_ggtt_insert_entries(struct i915_address_space
*vm
,
2333 struct sg_table
*st
,
2335 enum i915_cache_level level
, u32 unused
)
2337 struct drm_i915_private
*dev_priv
= to_i915(vm
->dev
);
2338 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
2339 struct sgt_iter sgt_iter
;
2340 gen8_pte_t __iomem
*gtt_entries
;
2341 gen8_pte_t gtt_entry
;
2346 rpm_atomic_seq
= assert_rpm_atomic_begin(dev_priv
);
2348 gtt_entries
= (gen8_pte_t __iomem
*)ggtt
->gsm
+ (start
>> PAGE_SHIFT
);
2350 for_each_sgt_dma(addr
, sgt_iter
, st
) {
2351 gtt_entry
= gen8_pte_encode(addr
, level
, true);
2352 gen8_set_pte(>t_entries
[i
++], gtt_entry
);
2356 * XXX: This serves as a posting read to make sure that the PTE has
2357 * actually been updated. There is some concern that even though
2358 * registers and PTEs are within the same BAR that they are potentially
2359 * of NUMA access patterns. Therefore, even with the way we assume
2360 * hardware should work, we must keep this posting read for paranoia.
2363 WARN_ON(readq(>t_entries
[i
-1]) != gtt_entry
);
2365 /* This next bit makes the above posting read even more important. We
2366 * want to flush the TLBs only after we're certain all the PTE updates
2369 I915_WRITE(GFX_FLSH_CNTL_GEN6
, GFX_FLSH_CNTL_EN
);
2370 POSTING_READ(GFX_FLSH_CNTL_GEN6
);
2372 assert_rpm_atomic_end(dev_priv
, rpm_atomic_seq
);
2375 struct insert_entries
{
2376 struct i915_address_space
*vm
;
2377 struct sg_table
*st
;
2379 enum i915_cache_level level
;
2383 static int gen8_ggtt_insert_entries__cb(void *_arg
)
2385 struct insert_entries
*arg
= _arg
;
2386 gen8_ggtt_insert_entries(arg
->vm
, arg
->st
,
2387 arg
->start
, arg
->level
, arg
->flags
);
2391 static void gen8_ggtt_insert_entries__BKL(struct i915_address_space
*vm
,
2392 struct sg_table
*st
,
2394 enum i915_cache_level level
,
2397 struct insert_entries arg
= { vm
, st
, start
, level
, flags
};
2398 stop_machine(gen8_ggtt_insert_entries__cb
, &arg
, NULL
);
2401 static void gen6_ggtt_insert_page(struct i915_address_space
*vm
,
2404 enum i915_cache_level level
,
2407 struct drm_i915_private
*dev_priv
= to_i915(vm
->dev
);
2408 gen6_pte_t __iomem
*pte
=
2409 (gen6_pte_t __iomem
*)dev_priv
->ggtt
.gsm
+
2410 (offset
>> PAGE_SHIFT
);
2413 rpm_atomic_seq
= assert_rpm_atomic_begin(dev_priv
);
2415 iowrite32(vm
->pte_encode(addr
, level
, true, flags
), pte
);
2417 I915_WRITE(GFX_FLSH_CNTL_GEN6
, GFX_FLSH_CNTL_EN
);
2418 POSTING_READ(GFX_FLSH_CNTL_GEN6
);
2420 assert_rpm_atomic_end(dev_priv
, rpm_atomic_seq
);
2424 * Binds an object into the global gtt with the specified cache level. The object
2425 * will be accessible to the GPU via commands whose operands reference offsets
2426 * within the global GTT as well as accessible by the GPU through the GMADR
2427 * mapped BAR (dev_priv->mm.gtt->gtt).
2429 static void gen6_ggtt_insert_entries(struct i915_address_space
*vm
,
2430 struct sg_table
*st
,
2432 enum i915_cache_level level
, u32 flags
)
2434 struct drm_i915_private
*dev_priv
= to_i915(vm
->dev
);
2435 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
2436 struct sgt_iter sgt_iter
;
2437 gen6_pte_t __iomem
*gtt_entries
;
2438 gen6_pte_t gtt_entry
;
2443 rpm_atomic_seq
= assert_rpm_atomic_begin(dev_priv
);
2445 gtt_entries
= (gen6_pte_t __iomem
*)ggtt
->gsm
+ (start
>> PAGE_SHIFT
);
2447 for_each_sgt_dma(addr
, sgt_iter
, st
) {
2448 gtt_entry
= vm
->pte_encode(addr
, level
, true, flags
);
2449 iowrite32(gtt_entry
, >t_entries
[i
++]);
2452 /* XXX: This serves as a posting read to make sure that the PTE has
2453 * actually been updated. There is some concern that even though
2454 * registers and PTEs are within the same BAR that they are potentially
2455 * of NUMA access patterns. Therefore, even with the way we assume
2456 * hardware should work, we must keep this posting read for paranoia.
2459 WARN_ON(readl(>t_entries
[i
-1]) != gtt_entry
);
2461 /* This next bit makes the above posting read even more important. We
2462 * want to flush the TLBs only after we're certain all the PTE updates
2465 I915_WRITE(GFX_FLSH_CNTL_GEN6
, GFX_FLSH_CNTL_EN
);
2466 POSTING_READ(GFX_FLSH_CNTL_GEN6
);
2468 assert_rpm_atomic_end(dev_priv
, rpm_atomic_seq
);
2471 static void nop_clear_range(struct i915_address_space
*vm
,
2478 static void gen8_ggtt_clear_range(struct i915_address_space
*vm
,
2483 struct drm_i915_private
*dev_priv
= to_i915(vm
->dev
);
2484 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
2485 unsigned first_entry
= start
>> PAGE_SHIFT
;
2486 unsigned num_entries
= length
>> PAGE_SHIFT
;
2487 gen8_pte_t scratch_pte
, __iomem
*gtt_base
=
2488 (gen8_pte_t __iomem
*)ggtt
->gsm
+ first_entry
;
2489 const int max_entries
= ggtt_total_entries(ggtt
) - first_entry
;
2493 rpm_atomic_seq
= assert_rpm_atomic_begin(dev_priv
);
2495 if (WARN(num_entries
> max_entries
,
2496 "First entry = %d; Num entries = %d (max=%d)\n",
2497 first_entry
, num_entries
, max_entries
))
2498 num_entries
= max_entries
;
2500 scratch_pte
= gen8_pte_encode(vm
->scratch_page
.daddr
,
2503 for (i
= 0; i
< num_entries
; i
++)
2504 gen8_set_pte(>t_base
[i
], scratch_pte
);
2507 assert_rpm_atomic_end(dev_priv
, rpm_atomic_seq
);
2510 static void gen6_ggtt_clear_range(struct i915_address_space
*vm
,
2515 struct drm_i915_private
*dev_priv
= to_i915(vm
->dev
);
2516 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
2517 unsigned first_entry
= start
>> PAGE_SHIFT
;
2518 unsigned num_entries
= length
>> PAGE_SHIFT
;
2519 gen6_pte_t scratch_pte
, __iomem
*gtt_base
=
2520 (gen6_pte_t __iomem
*)ggtt
->gsm
+ first_entry
;
2521 const int max_entries
= ggtt_total_entries(ggtt
) - first_entry
;
2525 rpm_atomic_seq
= assert_rpm_atomic_begin(dev_priv
);
2527 if (WARN(num_entries
> max_entries
,
2528 "First entry = %d; Num entries = %d (max=%d)\n",
2529 first_entry
, num_entries
, max_entries
))
2530 num_entries
= max_entries
;
2532 scratch_pte
= vm
->pte_encode(vm
->scratch_page
.daddr
,
2533 I915_CACHE_LLC
, use_scratch
, 0);
2535 for (i
= 0; i
< num_entries
; i
++)
2536 iowrite32(scratch_pte
, >t_base
[i
]);
2539 assert_rpm_atomic_end(dev_priv
, rpm_atomic_seq
);
2542 static void i915_ggtt_insert_page(struct i915_address_space
*vm
,
2545 enum i915_cache_level cache_level
,
2548 struct drm_i915_private
*dev_priv
= to_i915(vm
->dev
);
2549 unsigned int flags
= (cache_level
== I915_CACHE_NONE
) ?
2550 AGP_USER_MEMORY
: AGP_USER_CACHED_MEMORY
;
2553 rpm_atomic_seq
= assert_rpm_atomic_begin(dev_priv
);
2555 intel_gtt_insert_page(addr
, offset
>> PAGE_SHIFT
, flags
);
2557 assert_rpm_atomic_end(dev_priv
, rpm_atomic_seq
);
2560 static void i915_ggtt_insert_entries(struct i915_address_space
*vm
,
2561 struct sg_table
*pages
,
2563 enum i915_cache_level cache_level
, u32 unused
)
2565 struct drm_i915_private
*dev_priv
= to_i915(vm
->dev
);
2566 unsigned int flags
= (cache_level
== I915_CACHE_NONE
) ?
2567 AGP_USER_MEMORY
: AGP_USER_CACHED_MEMORY
;
2570 rpm_atomic_seq
= assert_rpm_atomic_begin(dev_priv
);
2572 intel_gtt_insert_sg_entries(pages
, start
>> PAGE_SHIFT
, flags
);
2574 assert_rpm_atomic_end(dev_priv
, rpm_atomic_seq
);
2578 static void i915_ggtt_clear_range(struct i915_address_space
*vm
,
2583 struct drm_i915_private
*dev_priv
= to_i915(vm
->dev
);
2584 unsigned first_entry
= start
>> PAGE_SHIFT
;
2585 unsigned num_entries
= length
>> PAGE_SHIFT
;
2588 rpm_atomic_seq
= assert_rpm_atomic_begin(dev_priv
);
2590 intel_gtt_clear_range(first_entry
, num_entries
);
2592 assert_rpm_atomic_end(dev_priv
, rpm_atomic_seq
);
2595 static int ggtt_bind_vma(struct i915_vma
*vma
,
2596 enum i915_cache_level cache_level
,
2599 struct drm_i915_gem_object
*obj
= vma
->obj
;
2603 ret
= i915_get_ggtt_vma_pages(vma
);
2607 /* Currently applicable only to VLV */
2609 pte_flags
|= PTE_READ_ONLY
;
2611 vma
->vm
->insert_entries(vma
->vm
, vma
->pages
, vma
->node
.start
,
2612 cache_level
, pte_flags
);
2615 * Without aliasing PPGTT there's no difference between
2616 * GLOBAL/LOCAL_BIND, it's all the same ptes. Hence unconditionally
2617 * upgrade to both bound if we bind either to avoid double-binding.
2619 vma
->flags
|= I915_VMA_GLOBAL_BIND
| I915_VMA_LOCAL_BIND
;
2624 static int aliasing_gtt_bind_vma(struct i915_vma
*vma
,
2625 enum i915_cache_level cache_level
,
2631 ret
= i915_get_ggtt_vma_pages(vma
);
2635 /* Currently applicable only to VLV */
2637 if (vma
->obj
->gt_ro
)
2638 pte_flags
|= PTE_READ_ONLY
;
2641 if (flags
& I915_VMA_GLOBAL_BIND
) {
2642 vma
->vm
->insert_entries(vma
->vm
,
2643 vma
->pages
, vma
->node
.start
,
2644 cache_level
, pte_flags
);
2647 if (flags
& I915_VMA_LOCAL_BIND
) {
2648 struct i915_hw_ppgtt
*appgtt
=
2649 to_i915(vma
->vm
->dev
)->mm
.aliasing_ppgtt
;
2650 appgtt
->base
.insert_entries(&appgtt
->base
,
2651 vma
->pages
, vma
->node
.start
,
2652 cache_level
, pte_flags
);
2658 static void ggtt_unbind_vma(struct i915_vma
*vma
)
2660 struct i915_hw_ppgtt
*appgtt
= to_i915(vma
->vm
->dev
)->mm
.aliasing_ppgtt
;
2661 const u64 size
= min(vma
->size
, vma
->node
.size
);
2663 if (vma
->flags
& I915_VMA_GLOBAL_BIND
)
2664 vma
->vm
->clear_range(vma
->vm
,
2665 vma
->node
.start
, size
,
2668 if (vma
->flags
& I915_VMA_LOCAL_BIND
&& appgtt
)
2669 appgtt
->base
.clear_range(&appgtt
->base
,
2670 vma
->node
.start
, size
,
2674 void i915_gem_gtt_finish_object(struct drm_i915_gem_object
*obj
)
2676 struct drm_i915_private
*dev_priv
= to_i915(obj
->base
.dev
);
2677 struct device
*kdev
= &dev_priv
->drm
.pdev
->dev
;
2678 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
2680 if (unlikely(ggtt
->do_idle_maps
)) {
2681 if (i915_gem_wait_for_idle(dev_priv
, I915_WAIT_LOCKED
)) {
2682 DRM_ERROR("Failed to wait for idle; VT'd may hang.\n");
2683 /* Wait a bit, in hopes it avoids the hang */
2688 dma_unmap_sg(kdev
, obj
->pages
->sgl
, obj
->pages
->nents
,
2689 PCI_DMA_BIDIRECTIONAL
);
2692 static void i915_gtt_color_adjust(struct drm_mm_node
*node
,
2693 unsigned long color
,
2697 if (node
->color
!= color
)
2700 node
= list_first_entry_or_null(&node
->node_list
,
2703 if (node
&& node
->allocated
&& node
->color
!= color
)
2707 int i915_gem_init_ggtt(struct drm_i915_private
*dev_priv
)
2709 /* Let GEM Manage all of the aperture.
2711 * However, leave one page at the end still bound to the scratch page.
2712 * There are a number of places where the hardware apparently prefetches
2713 * past the end of the object, and we've seen multiple hangs with the
2714 * GPU head pointer stuck in a batchbuffer bound at the last page of the
2715 * aperture. One page should be enough to keep any prefetching inside
2718 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
2719 unsigned long hole_start
, hole_end
;
2720 struct drm_mm_node
*entry
;
2723 ret
= intel_vgt_balloon(dev_priv
);
2727 /* Clear any non-preallocated blocks */
2728 drm_mm_for_each_hole(entry
, &ggtt
->base
.mm
, hole_start
, hole_end
) {
2729 DRM_DEBUG_KMS("clearing unused GTT space: [%lx, %lx]\n",
2730 hole_start
, hole_end
);
2731 ggtt
->base
.clear_range(&ggtt
->base
, hole_start
,
2732 hole_end
- hole_start
, true);
2735 /* And finally clear the reserved guard page */
2736 ggtt
->base
.clear_range(&ggtt
->base
,
2737 ggtt
->base
.total
- PAGE_SIZE
, PAGE_SIZE
,
2740 if (USES_PPGTT(dev_priv
) && !USES_FULL_PPGTT(dev_priv
)) {
2741 struct i915_hw_ppgtt
*ppgtt
;
2743 ppgtt
= kzalloc(sizeof(*ppgtt
), GFP_KERNEL
);
2747 ret
= __hw_ppgtt_init(ppgtt
, dev_priv
);
2753 if (ppgtt
->base
.allocate_va_range
)
2754 ret
= ppgtt
->base
.allocate_va_range(&ppgtt
->base
, 0,
2757 ppgtt
->base
.cleanup(&ppgtt
->base
);
2762 ppgtt
->base
.clear_range(&ppgtt
->base
,
2767 dev_priv
->mm
.aliasing_ppgtt
= ppgtt
;
2768 WARN_ON(ggtt
->base
.bind_vma
!= ggtt_bind_vma
);
2769 ggtt
->base
.bind_vma
= aliasing_gtt_bind_vma
;
2776 * i915_ggtt_cleanup_hw - Clean up GGTT hardware initialization
2777 * @dev_priv: i915 device
2779 void i915_ggtt_cleanup_hw(struct drm_i915_private
*dev_priv
)
2781 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
2783 if (dev_priv
->mm
.aliasing_ppgtt
) {
2784 struct i915_hw_ppgtt
*ppgtt
= dev_priv
->mm
.aliasing_ppgtt
;
2785 ppgtt
->base
.cleanup(&ppgtt
->base
);
2789 i915_gem_cleanup_stolen(&dev_priv
->drm
);
2791 if (drm_mm_initialized(&ggtt
->base
.mm
)) {
2792 intel_vgt_deballoon(dev_priv
);
2794 drm_mm_takedown(&ggtt
->base
.mm
);
2795 list_del(&ggtt
->base
.global_link
);
2798 ggtt
->base
.cleanup(&ggtt
->base
);
2800 arch_phys_wc_del(ggtt
->mtrr
);
2801 io_mapping_fini(&ggtt
->mappable
);
2804 static unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl
)
2806 snb_gmch_ctl
>>= SNB_GMCH_GGMS_SHIFT
;
2807 snb_gmch_ctl
&= SNB_GMCH_GGMS_MASK
;
2808 return snb_gmch_ctl
<< 20;
2811 static unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl
)
2813 bdw_gmch_ctl
>>= BDW_GMCH_GGMS_SHIFT
;
2814 bdw_gmch_ctl
&= BDW_GMCH_GGMS_MASK
;
2816 bdw_gmch_ctl
= 1 << bdw_gmch_ctl
;
2818 #ifdef CONFIG_X86_32
2819 /* Limit 32b platforms to a 2GB GGTT: 4 << 20 / pte size * PAGE_SIZE */
2820 if (bdw_gmch_ctl
> 4)
2824 return bdw_gmch_ctl
<< 20;
2827 static unsigned int chv_get_total_gtt_size(u16 gmch_ctrl
)
2829 gmch_ctrl
>>= SNB_GMCH_GGMS_SHIFT
;
2830 gmch_ctrl
&= SNB_GMCH_GGMS_MASK
;
2833 return 1 << (20 + gmch_ctrl
);
2838 static size_t gen6_get_stolen_size(u16 snb_gmch_ctl
)
2840 snb_gmch_ctl
>>= SNB_GMCH_GMS_SHIFT
;
2841 snb_gmch_ctl
&= SNB_GMCH_GMS_MASK
;
2842 return snb_gmch_ctl
<< 25; /* 32 MB units */
2845 static size_t gen8_get_stolen_size(u16 bdw_gmch_ctl
)
2847 bdw_gmch_ctl
>>= BDW_GMCH_GMS_SHIFT
;
2848 bdw_gmch_ctl
&= BDW_GMCH_GMS_MASK
;
2849 return bdw_gmch_ctl
<< 25; /* 32 MB units */
2852 static size_t chv_get_stolen_size(u16 gmch_ctrl
)
2854 gmch_ctrl
>>= SNB_GMCH_GMS_SHIFT
;
2855 gmch_ctrl
&= SNB_GMCH_GMS_MASK
;
2858 * 0x0 to 0x10: 32MB increments starting at 0MB
2859 * 0x11 to 0x16: 4MB increments starting at 8MB
2860 * 0x17 to 0x1d: 4MB increments start at 36MB
2862 if (gmch_ctrl
< 0x11)
2863 return gmch_ctrl
<< 25;
2864 else if (gmch_ctrl
< 0x17)
2865 return (gmch_ctrl
- 0x11 + 2) << 22;
2867 return (gmch_ctrl
- 0x17 + 9) << 22;
2870 static size_t gen9_get_stolen_size(u16 gen9_gmch_ctl
)
2872 gen9_gmch_ctl
>>= BDW_GMCH_GMS_SHIFT
;
2873 gen9_gmch_ctl
&= BDW_GMCH_GMS_MASK
;
2875 if (gen9_gmch_ctl
< 0xf0)
2876 return gen9_gmch_ctl
<< 25; /* 32 MB units */
2878 /* 4MB increments starting at 0xf0 for 4MB */
2879 return (gen9_gmch_ctl
- 0xf0 + 1) << 22;
2882 static int ggtt_probe_common(struct i915_ggtt
*ggtt
, u64 size
)
2884 struct pci_dev
*pdev
= ggtt
->base
.dev
->pdev
;
2885 phys_addr_t phys_addr
;
2888 /* For Modern GENs the PTEs and register space are split in the BAR */
2889 phys_addr
= pci_resource_start(pdev
, 0) + pci_resource_len(pdev
, 0) / 2;
2892 * On BXT writes larger than 64 bit to the GTT pagetable range will be
2893 * dropped. For WC mappings in general we have 64 byte burst writes
2894 * when the WC buffer is flushed, so we can't use it, but have to
2895 * resort to an uncached mapping. The WC issue is easily caught by the
2896 * readback check when writing GTT PTE entries.
2898 if (IS_BROXTON(ggtt
->base
.dev
))
2899 ggtt
->gsm
= ioremap_nocache(phys_addr
, size
);
2901 ggtt
->gsm
= ioremap_wc(phys_addr
, size
);
2903 DRM_ERROR("Failed to map the ggtt page table\n");
2907 ret
= setup_scratch_page(ggtt
->base
.dev
,
2908 &ggtt
->base
.scratch_page
,
2911 DRM_ERROR("Scratch setup failed\n");
2912 /* iounmap will also get called at remove, but meh */
2920 /* The GGTT and PPGTT need a private PPAT setup in order to handle cacheability
2921 * bits. When using advanced contexts each context stores its own PAT, but
2922 * writing this data shouldn't be harmful even in those cases. */
2923 static void bdw_setup_private_ppat(struct drm_i915_private
*dev_priv
)
2927 pat
= GEN8_PPAT(0, GEN8_PPAT_WB
| GEN8_PPAT_LLC
) | /* for normal objects, no eLLC */
2928 GEN8_PPAT(1, GEN8_PPAT_WC
| GEN8_PPAT_LLCELLC
) | /* for something pointing to ptes? */
2929 GEN8_PPAT(2, GEN8_PPAT_WT
| GEN8_PPAT_LLCELLC
) | /* for scanout with eLLC */
2930 GEN8_PPAT(3, GEN8_PPAT_UC
) | /* Uncached objects, mostly for scanout */
2931 GEN8_PPAT(4, GEN8_PPAT_WB
| GEN8_PPAT_LLCELLC
| GEN8_PPAT_AGE(0)) |
2932 GEN8_PPAT(5, GEN8_PPAT_WB
| GEN8_PPAT_LLCELLC
| GEN8_PPAT_AGE(1)) |
2933 GEN8_PPAT(6, GEN8_PPAT_WB
| GEN8_PPAT_LLCELLC
| GEN8_PPAT_AGE(2)) |
2934 GEN8_PPAT(7, GEN8_PPAT_WB
| GEN8_PPAT_LLCELLC
| GEN8_PPAT_AGE(3));
2936 if (!USES_PPGTT(dev_priv
))
2937 /* Spec: "For GGTT, there is NO pat_sel[2:0] from the entry,
2938 * so RTL will always use the value corresponding to
2940 * So let's disable cache for GGTT to avoid screen corruptions.
2941 * MOCS still can be used though.
2942 * - System agent ggtt writes (i.e. cpu gtt mmaps) already work
2943 * before this patch, i.e. the same uncached + snooping access
2944 * like on gen6/7 seems to be in effect.
2945 * - So this just fixes blitter/render access. Again it looks
2946 * like it's not just uncached access, but uncached + snooping.
2947 * So we can still hold onto all our assumptions wrt cpu
2948 * clflushing on LLC machines.
2950 pat
= GEN8_PPAT(0, GEN8_PPAT_UC
);
2952 /* XXX: spec defines this as 2 distinct registers. It's unclear if a 64b
2953 * write would work. */
2954 I915_WRITE(GEN8_PRIVATE_PAT_LO
, pat
);
2955 I915_WRITE(GEN8_PRIVATE_PAT_HI
, pat
>> 32);
2958 static void chv_setup_private_ppat(struct drm_i915_private
*dev_priv
)
2963 * Map WB on BDW to snooped on CHV.
2965 * Only the snoop bit has meaning for CHV, the rest is
2968 * The hardware will never snoop for certain types of accesses:
2969 * - CPU GTT (GMADR->GGTT->no snoop->memory)
2970 * - PPGTT page tables
2971 * - some other special cycles
2973 * As with BDW, we also need to consider the following for GT accesses:
2974 * "For GGTT, there is NO pat_sel[2:0] from the entry,
2975 * so RTL will always use the value corresponding to
2977 * Which means we must set the snoop bit in PAT entry 0
2978 * in order to keep the global status page working.
2980 pat
= GEN8_PPAT(0, CHV_PPAT_SNOOP
) |
2984 GEN8_PPAT(4, CHV_PPAT_SNOOP
) |
2985 GEN8_PPAT(5, CHV_PPAT_SNOOP
) |
2986 GEN8_PPAT(6, CHV_PPAT_SNOOP
) |
2987 GEN8_PPAT(7, CHV_PPAT_SNOOP
);
2989 I915_WRITE(GEN8_PRIVATE_PAT_LO
, pat
);
2990 I915_WRITE(GEN8_PRIVATE_PAT_HI
, pat
>> 32);
2993 static void gen6_gmch_remove(struct i915_address_space
*vm
)
2995 struct i915_ggtt
*ggtt
= i915_vm_to_ggtt(vm
);
2998 cleanup_scratch_page(vm
->dev
, &vm
->scratch_page
);
3001 static int gen8_gmch_probe(struct i915_ggtt
*ggtt
)
3003 struct drm_i915_private
*dev_priv
= to_i915(ggtt
->base
.dev
);
3004 struct pci_dev
*pdev
= dev_priv
->drm
.pdev
;
3008 /* TODO: We're not aware of mappable constraints on gen8 yet */
3009 ggtt
->mappable_base
= pci_resource_start(pdev
, 2);
3010 ggtt
->mappable_end
= pci_resource_len(pdev
, 2);
3012 if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(39)))
3013 pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(39));
3015 pci_read_config_word(pdev
, SNB_GMCH_CTRL
, &snb_gmch_ctl
);
3017 if (INTEL_GEN(dev_priv
) >= 9) {
3018 ggtt
->stolen_size
= gen9_get_stolen_size(snb_gmch_ctl
);
3019 size
= gen8_get_total_gtt_size(snb_gmch_ctl
);
3020 } else if (IS_CHERRYVIEW(dev_priv
)) {
3021 ggtt
->stolen_size
= chv_get_stolen_size(snb_gmch_ctl
);
3022 size
= chv_get_total_gtt_size(snb_gmch_ctl
);
3024 ggtt
->stolen_size
= gen8_get_stolen_size(snb_gmch_ctl
);
3025 size
= gen8_get_total_gtt_size(snb_gmch_ctl
);
3028 ggtt
->base
.total
= (size
/ sizeof(gen8_pte_t
)) << PAGE_SHIFT
;
3030 if (IS_CHERRYVIEW(dev_priv
) || IS_BROXTON(dev_priv
))
3031 chv_setup_private_ppat(dev_priv
);
3033 bdw_setup_private_ppat(dev_priv
);
3035 ggtt
->base
.cleanup
= gen6_gmch_remove
;
3036 ggtt
->base
.bind_vma
= ggtt_bind_vma
;
3037 ggtt
->base
.unbind_vma
= ggtt_unbind_vma
;
3038 ggtt
->base
.insert_page
= gen8_ggtt_insert_page
;
3039 ggtt
->base
.clear_range
= nop_clear_range
;
3040 if (!USES_FULL_PPGTT(dev_priv
) || intel_scanout_needs_vtd_wa(dev_priv
))
3041 ggtt
->base
.clear_range
= gen8_ggtt_clear_range
;
3043 ggtt
->base
.insert_entries
= gen8_ggtt_insert_entries
;
3044 if (IS_CHERRYVIEW(dev_priv
))
3045 ggtt
->base
.insert_entries
= gen8_ggtt_insert_entries__BKL
;
3047 return ggtt_probe_common(ggtt
, size
);
3050 static int gen6_gmch_probe(struct i915_ggtt
*ggtt
)
3052 struct drm_i915_private
*dev_priv
= to_i915(ggtt
->base
.dev
);
3053 struct pci_dev
*pdev
= dev_priv
->drm
.pdev
;
3057 ggtt
->mappable_base
= pci_resource_start(pdev
, 2);
3058 ggtt
->mappable_end
= pci_resource_len(pdev
, 2);
3060 /* 64/512MB is the current min/max we actually know of, but this is just
3061 * a coarse sanity check.
3063 if (ggtt
->mappable_end
< (64<<20) || ggtt
->mappable_end
> (512<<20)) {
3064 DRM_ERROR("Unknown GMADR size (%llx)\n", ggtt
->mappable_end
);
3068 if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(40)))
3069 pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(40));
3070 pci_read_config_word(pdev
, SNB_GMCH_CTRL
, &snb_gmch_ctl
);
3072 ggtt
->stolen_size
= gen6_get_stolen_size(snb_gmch_ctl
);
3074 size
= gen6_get_total_gtt_size(snb_gmch_ctl
);
3075 ggtt
->base
.total
= (size
/ sizeof(gen6_pte_t
)) << PAGE_SHIFT
;
3077 ggtt
->base
.clear_range
= gen6_ggtt_clear_range
;
3078 ggtt
->base
.insert_page
= gen6_ggtt_insert_page
;
3079 ggtt
->base
.insert_entries
= gen6_ggtt_insert_entries
;
3080 ggtt
->base
.bind_vma
= ggtt_bind_vma
;
3081 ggtt
->base
.unbind_vma
= ggtt_unbind_vma
;
3082 ggtt
->base
.cleanup
= gen6_gmch_remove
;
3084 if (HAS_EDRAM(dev_priv
))
3085 ggtt
->base
.pte_encode
= iris_pte_encode
;
3086 else if (IS_HASWELL(dev_priv
))
3087 ggtt
->base
.pte_encode
= hsw_pte_encode
;
3088 else if (IS_VALLEYVIEW(dev_priv
))
3089 ggtt
->base
.pte_encode
= byt_pte_encode
;
3090 else if (INTEL_GEN(dev_priv
) >= 7)
3091 ggtt
->base
.pte_encode
= ivb_pte_encode
;
3093 ggtt
->base
.pte_encode
= snb_pte_encode
;
3095 return ggtt_probe_common(ggtt
, size
);
3098 static void i915_gmch_remove(struct i915_address_space
*vm
)
3100 intel_gmch_remove();
3103 static int i915_gmch_probe(struct i915_ggtt
*ggtt
)
3105 struct drm_i915_private
*dev_priv
= to_i915(ggtt
->base
.dev
);
3108 ret
= intel_gmch_probe(dev_priv
->bridge_dev
, dev_priv
->drm
.pdev
, NULL
);
3110 DRM_ERROR("failed to set up gmch\n");
3114 intel_gtt_get(&ggtt
->base
.total
, &ggtt
->stolen_size
,
3115 &ggtt
->mappable_base
, &ggtt
->mappable_end
);
3117 ggtt
->do_idle_maps
= needs_idle_maps(dev_priv
);
3118 ggtt
->base
.insert_page
= i915_ggtt_insert_page
;
3119 ggtt
->base
.insert_entries
= i915_ggtt_insert_entries
;
3120 ggtt
->base
.clear_range
= i915_ggtt_clear_range
;
3121 ggtt
->base
.bind_vma
= ggtt_bind_vma
;
3122 ggtt
->base
.unbind_vma
= ggtt_unbind_vma
;
3123 ggtt
->base
.cleanup
= i915_gmch_remove
;
3125 if (unlikely(ggtt
->do_idle_maps
))
3126 DRM_INFO("applying Ironlake quirks for intel_iommu\n");
3132 * i915_ggtt_probe_hw - Probe GGTT hardware location
3133 * @dev_priv: i915 device
3135 int i915_ggtt_probe_hw(struct drm_i915_private
*dev_priv
)
3137 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
3140 ggtt
->base
.dev
= &dev_priv
->drm
;
3142 if (INTEL_GEN(dev_priv
) <= 5)
3143 ret
= i915_gmch_probe(ggtt
);
3144 else if (INTEL_GEN(dev_priv
) < 8)
3145 ret
= gen6_gmch_probe(ggtt
);
3147 ret
= gen8_gmch_probe(ggtt
);
3151 if ((ggtt
->base
.total
- 1) >> 32) {
3152 DRM_ERROR("We never expected a Global GTT with more than 32bits"
3153 " of address space! Found %lldM!\n",
3154 ggtt
->base
.total
>> 20);
3155 ggtt
->base
.total
= 1ULL << 32;
3156 ggtt
->mappable_end
= min(ggtt
->mappable_end
, ggtt
->base
.total
);
3159 if (ggtt
->mappable_end
> ggtt
->base
.total
) {
3160 DRM_ERROR("mappable aperture extends past end of GGTT,"
3161 " aperture=%llx, total=%llx\n",
3162 ggtt
->mappable_end
, ggtt
->base
.total
);
3163 ggtt
->mappable_end
= ggtt
->base
.total
;
3166 /* GMADR is the PCI mmio aperture into the global GTT. */
3167 DRM_INFO("Memory usable by graphics device = %lluM\n",
3168 ggtt
->base
.total
>> 20);
3169 DRM_DEBUG_DRIVER("GMADR size = %lldM\n", ggtt
->mappable_end
>> 20);
3170 DRM_DEBUG_DRIVER("GTT stolen size = %zdM\n", ggtt
->stolen_size
>> 20);
3171 #ifdef CONFIG_INTEL_IOMMU
3172 if (intel_iommu_gfx_mapped
)
3173 DRM_INFO("VT-d active for gfx access\n");
3180 * i915_ggtt_init_hw - Initialize GGTT hardware
3181 * @dev_priv: i915 device
3183 int i915_ggtt_init_hw(struct drm_i915_private
*dev_priv
)
3185 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
3188 INIT_LIST_HEAD(&dev_priv
->vm_list
);
3190 /* Subtract the guard page before address space initialization to
3191 * shrink the range used by drm_mm.
3193 ggtt
->base
.total
-= PAGE_SIZE
;
3194 i915_address_space_init(&ggtt
->base
, dev_priv
);
3195 ggtt
->base
.total
+= PAGE_SIZE
;
3196 if (!HAS_LLC(dev_priv
))
3197 ggtt
->base
.mm
.color_adjust
= i915_gtt_color_adjust
;
3199 if (!io_mapping_init_wc(&dev_priv
->ggtt
.mappable
,
3200 dev_priv
->ggtt
.mappable_base
,
3201 dev_priv
->ggtt
.mappable_end
)) {
3203 goto out_gtt_cleanup
;
3206 ggtt
->mtrr
= arch_phys_wc_add(ggtt
->mappable_base
, ggtt
->mappable_end
);
3209 * Initialise stolen early so that we may reserve preallocated
3210 * objects for the BIOS to KMS transition.
3212 ret
= i915_gem_init_stolen(&dev_priv
->drm
);
3214 goto out_gtt_cleanup
;
3219 ggtt
->base
.cleanup(&ggtt
->base
);
3223 int i915_ggtt_enable_hw(struct drm_i915_private
*dev_priv
)
3225 if (INTEL_GEN(dev_priv
) < 6 && !intel_enable_gtt())
3231 void i915_gem_restore_gtt_mappings(struct drm_device
*dev
)
3233 struct drm_i915_private
*dev_priv
= to_i915(dev
);
3234 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
3235 struct drm_i915_gem_object
*obj
, *on
;
3237 i915_check_and_clear_faults(dev_priv
);
3239 /* First fill our portion of the GTT with scratch pages */
3240 ggtt
->base
.clear_range(&ggtt
->base
, ggtt
->base
.start
, ggtt
->base
.total
,
3243 ggtt
->base
.closed
= true; /* skip rewriting PTE on VMA unbind */
3245 /* clflush objects bound into the GGTT and rebind them. */
3246 list_for_each_entry_safe(obj
, on
,
3247 &dev_priv
->mm
.bound_list
, global_list
) {
3248 bool ggtt_bound
= false;
3249 struct i915_vma
*vma
;
3251 list_for_each_entry(vma
, &obj
->vma_list
, obj_link
) {
3252 if (vma
->vm
!= &ggtt
->base
)
3255 if (!i915_vma_unbind(vma
))
3258 WARN_ON(i915_vma_bind(vma
, obj
->cache_level
,
3264 WARN_ON(i915_gem_object_set_to_gtt_domain(obj
, false));
3267 ggtt
->base
.closed
= false;
3269 if (INTEL_INFO(dev
)->gen
>= 8) {
3270 if (IS_CHERRYVIEW(dev
) || IS_BROXTON(dev
))
3271 chv_setup_private_ppat(dev_priv
);
3273 bdw_setup_private_ppat(dev_priv
);
3278 if (USES_PPGTT(dev
)) {
3279 struct i915_address_space
*vm
;
3281 list_for_each_entry(vm
, &dev_priv
->vm_list
, global_link
) {
3282 /* TODO: Perhaps it shouldn't be gen6 specific */
3284 struct i915_hw_ppgtt
*ppgtt
;
3286 if (i915_is_ggtt(vm
))
3287 ppgtt
= dev_priv
->mm
.aliasing_ppgtt
;
3289 ppgtt
= i915_vm_to_ppgtt(vm
);
3291 gen6_write_page_range(dev_priv
, &ppgtt
->pd
,
3292 0, ppgtt
->base
.total
);
3296 i915_ggtt_flush(dev_priv
);
3300 i915_vma_retire(struct i915_gem_active
*active
,
3301 struct drm_i915_gem_request
*rq
)
3303 const unsigned int idx
= rq
->engine
->id
;
3304 struct i915_vma
*vma
=
3305 container_of(active
, struct i915_vma
, last_read
[idx
]);
3307 GEM_BUG_ON(!i915_vma_has_active_engine(vma
, idx
));
3309 i915_vma_clear_active(vma
, idx
);
3310 if (i915_vma_is_active(vma
))
3313 list_move_tail(&vma
->vm_link
, &vma
->vm
->inactive_list
);
3314 if (unlikely(i915_vma_is_closed(vma
) && !i915_vma_is_pinned(vma
)))
3315 WARN_ON(i915_vma_unbind(vma
));
3318 void i915_vma_destroy(struct i915_vma
*vma
)
3320 GEM_BUG_ON(vma
->node
.allocated
);
3321 GEM_BUG_ON(i915_vma_is_active(vma
));
3322 GEM_BUG_ON(!i915_vma_is_closed(vma
));
3323 GEM_BUG_ON(vma
->fence
);
3325 list_del(&vma
->vm_link
);
3326 if (!i915_vma_is_ggtt(vma
))
3327 i915_ppgtt_put(i915_vm_to_ppgtt(vma
->vm
));
3329 kmem_cache_free(to_i915(vma
->obj
->base
.dev
)->vmas
, vma
);
3332 void i915_vma_close(struct i915_vma
*vma
)
3334 GEM_BUG_ON(i915_vma_is_closed(vma
));
3335 vma
->flags
|= I915_VMA_CLOSED
;
3337 list_del_init(&vma
->obj_link
);
3338 if (!i915_vma_is_active(vma
) && !i915_vma_is_pinned(vma
))
3339 WARN_ON(i915_vma_unbind(vma
));
3342 static struct i915_vma
*
3343 __i915_vma_create(struct drm_i915_gem_object
*obj
,
3344 struct i915_address_space
*vm
,
3345 const struct i915_ggtt_view
*view
)
3347 struct i915_vma
*vma
;
3350 GEM_BUG_ON(vm
->closed
);
3352 vma
= kmem_cache_zalloc(to_i915(obj
->base
.dev
)->vmas
, GFP_KERNEL
);
3354 return ERR_PTR(-ENOMEM
);
3356 INIT_LIST_HEAD(&vma
->exec_list
);
3357 for (i
= 0; i
< ARRAY_SIZE(vma
->last_read
); i
++)
3358 init_request_active(&vma
->last_read
[i
], i915_vma_retire
);
3359 init_request_active(&vma
->last_fence
, NULL
);
3360 list_add(&vma
->vm_link
, &vm
->unbound_list
);
3363 vma
->size
= obj
->base
.size
;
3366 vma
->ggtt_view
= *view
;
3367 if (view
->type
== I915_GGTT_VIEW_PARTIAL
) {
3368 vma
->size
= view
->params
.partial
.size
;
3369 vma
->size
<<= PAGE_SHIFT
;
3370 } else if (view
->type
== I915_GGTT_VIEW_ROTATED
) {
3372 intel_rotation_info_size(&view
->params
.rotated
);
3373 vma
->size
<<= PAGE_SHIFT
;
3377 if (i915_is_ggtt(vm
)) {
3378 vma
->flags
|= I915_VMA_GGTT
;
3380 i915_ppgtt_get(i915_vm_to_ppgtt(vm
));
3383 list_add_tail(&vma
->obj_link
, &obj
->vma_list
);
3387 static inline bool vma_matches(struct i915_vma
*vma
,
3388 struct i915_address_space
*vm
,
3389 const struct i915_ggtt_view
*view
)
3394 if (!i915_vma_is_ggtt(vma
))
3398 return vma
->ggtt_view
.type
== 0;
3400 if (vma
->ggtt_view
.type
!= view
->type
)
3403 return memcmp(&vma
->ggtt_view
.params
,
3405 sizeof(view
->params
)) == 0;
3409 i915_vma_create(struct drm_i915_gem_object
*obj
,
3410 struct i915_address_space
*vm
,
3411 const struct i915_ggtt_view
*view
)
3413 GEM_BUG_ON(view
&& !i915_is_ggtt(vm
));
3414 GEM_BUG_ON(i915_gem_obj_to_vma(obj
, vm
, view
));
3416 return __i915_vma_create(obj
, vm
, view
);
3420 i915_gem_obj_to_vma(struct drm_i915_gem_object
*obj
,
3421 struct i915_address_space
*vm
,
3422 const struct i915_ggtt_view
*view
)
3424 struct i915_vma
*vma
;
3426 list_for_each_entry_reverse(vma
, &obj
->vma_list
, obj_link
)
3427 if (vma_matches(vma
, vm
, view
))
3434 i915_gem_obj_lookup_or_create_vma(struct drm_i915_gem_object
*obj
,
3435 struct i915_address_space
*vm
,
3436 const struct i915_ggtt_view
*view
)
3438 struct i915_vma
*vma
;
3440 GEM_BUG_ON(view
&& !i915_is_ggtt(vm
));
3442 vma
= i915_gem_obj_to_vma(obj
, vm
, view
);
3444 vma
= __i915_vma_create(obj
, vm
, view
);
3446 GEM_BUG_ON(i915_vma_is_closed(vma
));
3450 static struct scatterlist
*
3451 rotate_pages(const dma_addr_t
*in
, unsigned int offset
,
3452 unsigned int width
, unsigned int height
,
3453 unsigned int stride
,
3454 struct sg_table
*st
, struct scatterlist
*sg
)
3456 unsigned int column
, row
;
3457 unsigned int src_idx
;
3459 for (column
= 0; column
< width
; column
++) {
3460 src_idx
= stride
* (height
- 1) + column
;
3461 for (row
= 0; row
< height
; row
++) {
3463 /* We don't need the pages, but need to initialize
3464 * the entries so the sg list can be happily traversed.
3465 * The only thing we need are DMA addresses.
3467 sg_set_page(sg
, NULL
, PAGE_SIZE
, 0);
3468 sg_dma_address(sg
) = in
[offset
+ src_idx
];
3469 sg_dma_len(sg
) = PAGE_SIZE
;
3478 static struct sg_table
*
3479 intel_rotate_fb_obj_pages(const struct intel_rotation_info
*rot_info
,
3480 struct drm_i915_gem_object
*obj
)
3482 const size_t n_pages
= obj
->base
.size
/ PAGE_SIZE
;
3483 unsigned int size
= intel_rotation_info_size(rot_info
);
3484 struct sgt_iter sgt_iter
;
3485 dma_addr_t dma_addr
;
3487 dma_addr_t
*page_addr_list
;
3488 struct sg_table
*st
;
3489 struct scatterlist
*sg
;
3492 /* Allocate a temporary list of source pages for random access. */
3493 page_addr_list
= drm_malloc_gfp(n_pages
,
3496 if (!page_addr_list
)
3497 return ERR_PTR(ret
);
3499 /* Allocate target SG list. */
3500 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
3504 ret
= sg_alloc_table(st
, size
, GFP_KERNEL
);
3508 /* Populate source page list from the object. */
3510 for_each_sgt_dma(dma_addr
, sgt_iter
, obj
->pages
)
3511 page_addr_list
[i
++] = dma_addr
;
3513 GEM_BUG_ON(i
!= n_pages
);
3517 for (i
= 0 ; i
< ARRAY_SIZE(rot_info
->plane
); i
++) {
3518 sg
= rotate_pages(page_addr_list
, rot_info
->plane
[i
].offset
,
3519 rot_info
->plane
[i
].width
, rot_info
->plane
[i
].height
,
3520 rot_info
->plane
[i
].stride
, st
, sg
);
3523 DRM_DEBUG_KMS("Created rotated page mapping for object size %zu (%ux%u tiles, %u pages)\n",
3524 obj
->base
.size
, rot_info
->plane
[0].width
, rot_info
->plane
[0].height
, size
);
3526 drm_free_large(page_addr_list
);
3533 drm_free_large(page_addr_list
);
3535 DRM_DEBUG_KMS("Failed to create rotated mapping for object size %zu! (%ux%u tiles, %u pages)\n",
3536 obj
->base
.size
, rot_info
->plane
[0].width
, rot_info
->plane
[0].height
, size
);
3538 return ERR_PTR(ret
);
3541 static struct sg_table
*
3542 intel_partial_pages(const struct i915_ggtt_view
*view
,
3543 struct drm_i915_gem_object
*obj
)
3545 struct sg_table
*st
;
3546 struct scatterlist
*sg
;
3547 struct sg_page_iter obj_sg_iter
;
3550 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
3554 ret
= sg_alloc_table(st
, view
->params
.partial
.size
, GFP_KERNEL
);
3560 for_each_sg_page(obj
->pages
->sgl
, &obj_sg_iter
, obj
->pages
->nents
,
3561 view
->params
.partial
.offset
)
3563 if (st
->nents
>= view
->params
.partial
.size
)
3566 sg_set_page(sg
, NULL
, PAGE_SIZE
, 0);
3567 sg_dma_address(sg
) = sg_page_iter_dma_address(&obj_sg_iter
);
3568 sg_dma_len(sg
) = PAGE_SIZE
;
3579 return ERR_PTR(ret
);
3583 i915_get_ggtt_vma_pages(struct i915_vma
*vma
)
3590 if (vma
->ggtt_view
.type
== I915_GGTT_VIEW_NORMAL
)
3591 vma
->pages
= vma
->obj
->pages
;
3592 else if (vma
->ggtt_view
.type
== I915_GGTT_VIEW_ROTATED
)
3594 intel_rotate_fb_obj_pages(&vma
->ggtt_view
.params
.rotated
, vma
->obj
);
3595 else if (vma
->ggtt_view
.type
== I915_GGTT_VIEW_PARTIAL
)
3596 vma
->pages
= intel_partial_pages(&vma
->ggtt_view
, vma
->obj
);
3598 WARN_ONCE(1, "GGTT view %u not implemented!\n",
3599 vma
->ggtt_view
.type
);
3602 DRM_ERROR("Failed to get pages for GGTT view type %u!\n",
3603 vma
->ggtt_view
.type
);
3605 } else if (IS_ERR(vma
->pages
)) {
3606 ret
= PTR_ERR(vma
->pages
);
3608 DRM_ERROR("Failed to get pages for VMA view type %u (%d)!\n",
3609 vma
->ggtt_view
.type
, ret
);
3616 * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space.
3618 * @cache_level: mapping cache level
3619 * @flags: flags like global or local mapping
3621 * DMA addresses are taken from the scatter-gather table of this object (or of
3622 * this VMA in case of non-default GGTT views) and PTE entries set up.
3623 * Note that DMA addresses are also the only part of the SG table we care about.
3625 int i915_vma_bind(struct i915_vma
*vma
, enum i915_cache_level cache_level
,
3632 if (WARN_ON(flags
== 0))
3636 if (flags
& PIN_GLOBAL
)
3637 bind_flags
|= I915_VMA_GLOBAL_BIND
;
3638 if (flags
& PIN_USER
)
3639 bind_flags
|= I915_VMA_LOCAL_BIND
;
3641 vma_flags
= vma
->flags
& (I915_VMA_GLOBAL_BIND
| I915_VMA_LOCAL_BIND
);
3642 if (flags
& PIN_UPDATE
)
3643 bind_flags
|= vma_flags
;
3645 bind_flags
&= ~vma_flags
;
3646 if (bind_flags
== 0)
3649 if (vma_flags
== 0 && vma
->vm
->allocate_va_range
) {
3650 trace_i915_va_alloc(vma
);
3651 ret
= vma
->vm
->allocate_va_range(vma
->vm
,
3658 ret
= vma
->vm
->bind_vma(vma
, cache_level
, bind_flags
);
3662 vma
->flags
|= bind_flags
;
3666 void __iomem
*i915_vma_pin_iomap(struct i915_vma
*vma
)
3670 /* Access through the GTT requires the device to be awake. */
3671 assert_rpm_wakelock_held(to_i915(vma
->vm
->dev
));
3673 lockdep_assert_held(&vma
->vm
->dev
->struct_mutex
);
3674 if (WARN_ON(!i915_vma_is_map_and_fenceable(vma
)))
3675 return IO_ERR_PTR(-ENODEV
);
3677 GEM_BUG_ON(!i915_vma_is_ggtt(vma
));
3678 GEM_BUG_ON((vma
->flags
& I915_VMA_GLOBAL_BIND
) == 0);
3682 ptr
= io_mapping_map_wc(&i915_vm_to_ggtt(vma
->vm
)->mappable
,
3686 return IO_ERR_PTR(-ENOMEM
);
3691 __i915_vma_pin(vma
);
3695 void i915_vma_unpin_and_release(struct i915_vma
**p_vma
)
3697 struct i915_vma
*vma
;
3699 vma
= fetch_and_zero(p_vma
);
3703 i915_vma_unpin(vma
);