2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
24 * Authors: Dave Airlie
29 #include <drm/radeon_drm.h>
31 #include "radeon_trace.h"
35 * GPUVM is similar to the legacy gart on older asics, however
36 * rather than there being a single global gart table
37 * for the entire GPU, there are multiple VM page tables active
38 * at any given time. The VM page tables can contain a mix
39 * vram pages and system memory pages and system memory pages
40 * can be mapped as snooped (cached system pages) or unsnooped
41 * (uncached system pages).
42 * Each VM has an ID associated with it and there is a page table
43 * associated with each VMID. When execting a command buffer,
44 * the kernel tells the the ring what VMID to use for that command
45 * buffer. VMIDs are allocated dynamically as commands are submitted.
46 * The userspace drivers maintain their own address space and the kernel
47 * sets up their pages tables accordingly when they submit their
48 * command buffers and a VMID is assigned.
49 * Cayman/Trinity support up to 8 active VMs at any given time;
54 * radeon_vm_num_pde - return the number of page directory entries
56 * @rdev: radeon_device pointer
58 * Calculate the number of page directory entries (cayman+).
60 static unsigned radeon_vm_num_pdes(struct radeon_device
*rdev
)
62 return rdev
->vm_manager
.max_pfn
>> radeon_vm_block_size
;
66 * radeon_vm_directory_size - returns the size of the page directory in bytes
68 * @rdev: radeon_device pointer
70 * Calculate the size of the page directory in bytes (cayman+).
72 static unsigned radeon_vm_directory_size(struct radeon_device
*rdev
)
74 return RADEON_GPU_PAGE_ALIGN(radeon_vm_num_pdes(rdev
) * 8);
78 * radeon_vm_manager_init - init the vm manager
80 * @rdev: radeon_device pointer
82 * Init the vm manager (cayman+).
83 * Returns 0 for success, error for failure.
85 int radeon_vm_manager_init(struct radeon_device
*rdev
)
89 if (!rdev
->vm_manager
.enabled
) {
90 r
= radeon_asic_vm_init(rdev
);
94 rdev
->vm_manager
.enabled
= true;
100 * radeon_vm_manager_fini - tear down the vm manager
102 * @rdev: radeon_device pointer
104 * Tear down the VM manager (cayman+).
106 void radeon_vm_manager_fini(struct radeon_device
*rdev
)
110 if (!rdev
->vm_manager
.enabled
)
113 for (i
= 0; i
< RADEON_NUM_VM
; ++i
)
114 radeon_fence_unref(&rdev
->vm_manager
.active
[i
]);
115 radeon_asic_vm_fini(rdev
);
116 rdev
->vm_manager
.enabled
= false;
120 * radeon_vm_get_bos - add the vm BOs to a validation list
122 * @vm: vm providing the BOs
123 * @head: head of validation list
125 * Add the page directory to the list of BOs to
126 * validate for command submission (cayman+).
128 struct radeon_cs_reloc
*radeon_vm_get_bos(struct radeon_device
*rdev
,
129 struct radeon_vm
*vm
,
130 struct list_head
*head
)
132 struct radeon_cs_reloc
*list
;
135 list
= kmalloc_array(vm
->max_pde_used
+ 2,
136 sizeof(struct radeon_cs_reloc
), GFP_KERNEL
);
140 /* add the vm page table to the list */
142 list
[0].robj
= vm
->page_directory
;
143 list
[0].prefered_domains
= RADEON_GEM_DOMAIN_VRAM
;
144 list
[0].allowed_domains
= RADEON_GEM_DOMAIN_VRAM
;
145 list
[0].tv
.bo
= &vm
->page_directory
->tbo
;
146 list
[0].tiling_flags
= 0;
148 list_add(&list
[0].tv
.head
, head
);
150 for (i
= 0, idx
= 1; i
<= vm
->max_pde_used
; i
++) {
151 if (!vm
->page_tables
[i
].bo
)
154 list
[idx
].gobj
= NULL
;
155 list
[idx
].robj
= vm
->page_tables
[i
].bo
;
156 list
[idx
].prefered_domains
= RADEON_GEM_DOMAIN_VRAM
;
157 list
[idx
].allowed_domains
= RADEON_GEM_DOMAIN_VRAM
;
158 list
[idx
].tv
.bo
= &list
[idx
].robj
->tbo
;
159 list
[idx
].tiling_flags
= 0;
160 list
[idx
].handle
= 0;
161 list_add(&list
[idx
++].tv
.head
, head
);
168 * radeon_vm_grab_id - allocate the next free VMID
170 * @rdev: radeon_device pointer
171 * @vm: vm to allocate id for
172 * @ring: ring we want to submit job to
174 * Allocate an id for the vm (cayman+).
175 * Returns the fence we need to sync to (if any).
177 * Global and local mutex must be locked!
179 struct radeon_fence
*radeon_vm_grab_id(struct radeon_device
*rdev
,
180 struct radeon_vm
*vm
, int ring
)
182 struct radeon_fence
*best
[RADEON_NUM_RINGS
] = {};
183 unsigned choices
[2] = {};
186 /* check if the id is still valid */
187 if (vm
->last_id_use
&& vm
->last_id_use
== rdev
->vm_manager
.active
[vm
->id
])
190 /* we definately need to flush */
191 radeon_fence_unref(&vm
->last_flush
);
193 /* skip over VMID 0, since it is the system VM */
194 for (i
= 1; i
< rdev
->vm_manager
.nvm
; ++i
) {
195 struct radeon_fence
*fence
= rdev
->vm_manager
.active
[i
];
198 /* found a free one */
200 trace_radeon_vm_grab_id(vm
->id
, ring
);
204 if (radeon_fence_is_earlier(fence
, best
[fence
->ring
])) {
205 best
[fence
->ring
] = fence
;
206 choices
[fence
->ring
== ring
? 0 : 1] = i
;
210 for (i
= 0; i
< 2; ++i
) {
213 trace_radeon_vm_grab_id(vm
->id
, ring
);
214 return rdev
->vm_manager
.active
[choices
[i
]];
218 /* should never happen */
224 * radeon_vm_flush - hardware flush the vm
226 * @rdev: radeon_device pointer
227 * @vm: vm we want to flush
228 * @ring: ring to use for flush
230 * Flush the vm (cayman+).
232 * Global and local mutex must be locked!
234 void radeon_vm_flush(struct radeon_device
*rdev
,
235 struct radeon_vm
*vm
,
238 uint64_t pd_addr
= radeon_bo_gpu_offset(vm
->page_directory
);
240 /* if we can't remember our last VM flush then flush now! */
241 if (!vm
->last_flush
|| pd_addr
!= vm
->pd_gpu_addr
) {
242 trace_radeon_vm_flush(pd_addr
, ring
, vm
->id
);
243 vm
->pd_gpu_addr
= pd_addr
;
244 radeon_ring_vm_flush(rdev
, ring
, vm
);
249 * radeon_vm_fence - remember fence for vm
251 * @rdev: radeon_device pointer
252 * @vm: vm we want to fence
253 * @fence: fence to remember
255 * Fence the vm (cayman+).
256 * Set the fence used to protect page table and id.
258 * Global and local mutex must be locked!
260 void radeon_vm_fence(struct radeon_device
*rdev
,
261 struct radeon_vm
*vm
,
262 struct radeon_fence
*fence
)
264 radeon_fence_unref(&vm
->fence
);
265 vm
->fence
= radeon_fence_ref(fence
);
267 radeon_fence_unref(&rdev
->vm_manager
.active
[vm
->id
]);
268 rdev
->vm_manager
.active
[vm
->id
] = radeon_fence_ref(fence
);
270 radeon_fence_unref(&vm
->last_id_use
);
271 vm
->last_id_use
= radeon_fence_ref(fence
);
273 /* we just flushed the VM, remember that */
275 vm
->last_flush
= radeon_fence_ref(fence
);
279 * radeon_vm_bo_find - find the bo_va for a specific vm & bo
282 * @bo: requested buffer object
284 * Find @bo inside the requested vm (cayman+).
285 * Search inside the @bos vm list for the requested vm
286 * Returns the found bo_va or NULL if none is found
288 * Object has to be reserved!
290 struct radeon_bo_va
*radeon_vm_bo_find(struct radeon_vm
*vm
,
291 struct radeon_bo
*bo
)
293 struct radeon_bo_va
*bo_va
;
295 list_for_each_entry(bo_va
, &bo
->va
, bo_list
) {
296 if (bo_va
->vm
== vm
) {
304 * radeon_vm_bo_add - add a bo to a specific vm
306 * @rdev: radeon_device pointer
308 * @bo: radeon buffer object
310 * Add @bo into the requested vm (cayman+).
311 * Add @bo to the list of bos associated with the vm
312 * Returns newly added bo_va or NULL for failure
314 * Object has to be reserved!
316 struct radeon_bo_va
*radeon_vm_bo_add(struct radeon_device
*rdev
,
317 struct radeon_vm
*vm
,
318 struct radeon_bo
*bo
)
320 struct radeon_bo_va
*bo_va
;
322 bo_va
= kzalloc(sizeof(struct radeon_bo_va
), GFP_KERNEL
);
332 bo_va
->ref_count
= 1;
333 INIT_LIST_HEAD(&bo_va
->bo_list
);
334 INIT_LIST_HEAD(&bo_va
->vm_status
);
336 mutex_lock(&vm
->mutex
);
337 list_add_tail(&bo_va
->bo_list
, &bo
->va
);
338 mutex_unlock(&vm
->mutex
);
344 * radeon_vm_set_pages - helper to call the right asic function
346 * @rdev: radeon_device pointer
347 * @ib: indirect buffer to fill with commands
348 * @pe: addr of the page entry
349 * @addr: dst addr to write into pe
350 * @count: number of page entries to update
351 * @incr: increase next addr by incr bytes
352 * @flags: hw access flags
354 * Traces the parameters and calls the right asic functions
355 * to setup the page table using the DMA.
357 static void radeon_vm_set_pages(struct radeon_device
*rdev
,
358 struct radeon_ib
*ib
,
360 uint64_t addr
, unsigned count
,
361 uint32_t incr
, uint32_t flags
)
363 trace_radeon_vm_set_page(pe
, addr
, count
, incr
, flags
);
365 if ((flags
& R600_PTE_GART_MASK
) == R600_PTE_GART_MASK
) {
366 uint64_t src
= rdev
->gart
.table_addr
+ (addr
>> 12) * 8;
367 radeon_asic_vm_copy_pages(rdev
, ib
, pe
, src
, count
);
369 } else if ((flags
& R600_PTE_SYSTEM
) || (count
< 3)) {
370 radeon_asic_vm_write_pages(rdev
, ib
, pe
, addr
,
374 radeon_asic_vm_set_pages(rdev
, ib
, pe
, addr
,
380 * radeon_vm_clear_bo - initially clear the page dir/table
382 * @rdev: radeon_device pointer
385 static int radeon_vm_clear_bo(struct radeon_device
*rdev
,
386 struct radeon_bo
*bo
)
388 struct ttm_validate_buffer tv
;
389 struct ww_acquire_ctx ticket
;
390 struct list_head head
;
396 memset(&tv
, 0, sizeof(tv
));
399 INIT_LIST_HEAD(&head
);
400 list_add(&tv
.head
, &head
);
402 r
= ttm_eu_reserve_buffers(&ticket
, &head
, true);
406 r
= ttm_bo_validate(&bo
->tbo
, &bo
->placement
, true, false);
410 addr
= radeon_bo_gpu_offset(bo
);
411 entries
= radeon_bo_size(bo
) / 8;
413 r
= radeon_ib_get(rdev
, R600_RING_TYPE_DMA_INDEX
, &ib
, NULL
, 256);
419 radeon_vm_set_pages(rdev
, &ib
, addr
, 0, entries
, 0, 0);
420 radeon_asic_vm_pad_ib(rdev
, &ib
);
421 WARN_ON(ib
.length_dw
> 64);
423 r
= radeon_ib_schedule(rdev
, &ib
, NULL
, false);
427 ttm_eu_fence_buffer_objects(&ticket
, &head
, &ib
.fence
->base
);
428 radeon_ib_free(rdev
, &ib
);
433 ttm_eu_backoff_reservation(&ticket
, &head
);
438 * radeon_vm_bo_set_addr - set bos virtual address inside a vm
440 * @rdev: radeon_device pointer
441 * @bo_va: bo_va to store the address
442 * @soffset: requested offset of the buffer in the VM address space
443 * @flags: attributes of pages (read/write/valid/etc.)
445 * Set offset of @bo_va (cayman+).
446 * Validate and set the offset requested within the vm address space.
447 * Returns 0 for success, error for failure.
449 * Object has to be reserved!
451 int radeon_vm_bo_set_addr(struct radeon_device
*rdev
,
452 struct radeon_bo_va
*bo_va
,
456 uint64_t size
= radeon_bo_size(bo_va
->bo
);
457 struct radeon_vm
*vm
= bo_va
->vm
;
458 unsigned last_pfn
, pt_idx
;
463 /* make sure object fit at this offset */
464 eoffset
= soffset
+ size
;
465 if (soffset
>= eoffset
) {
469 last_pfn
= eoffset
/ RADEON_GPU_PAGE_SIZE
;
470 if (last_pfn
> rdev
->vm_manager
.max_pfn
) {
471 dev_err(rdev
->dev
, "va above limit (0x%08X > 0x%08X)\n",
472 last_pfn
, rdev
->vm_manager
.max_pfn
);
477 eoffset
= last_pfn
= 0;
480 mutex_lock(&vm
->mutex
);
481 if (bo_va
->it
.start
|| bo_va
->it
.last
) {
483 /* add a clone of the bo_va to clear the old address */
484 struct radeon_bo_va
*tmp
;
485 tmp
= kzalloc(sizeof(struct radeon_bo_va
), GFP_KERNEL
);
487 mutex_unlock(&vm
->mutex
);
490 tmp
->it
.start
= bo_va
->it
.start
;
491 tmp
->it
.last
= bo_va
->it
.last
;
493 tmp
->addr
= bo_va
->addr
;
494 tmp
->bo
= radeon_bo_ref(bo_va
->bo
);
495 list_add(&tmp
->vm_status
, &vm
->freed
);
498 interval_tree_remove(&bo_va
->it
, &vm
->va
);
503 soffset
/= RADEON_GPU_PAGE_SIZE
;
504 eoffset
/= RADEON_GPU_PAGE_SIZE
;
505 if (soffset
|| eoffset
) {
506 struct interval_tree_node
*it
;
507 it
= interval_tree_iter_first(&vm
->va
, soffset
, eoffset
- 1);
509 struct radeon_bo_va
*tmp
;
510 tmp
= container_of(it
, struct radeon_bo_va
, it
);
511 /* bo and tmp overlap, invalid offset */
512 dev_err(rdev
->dev
, "bo %p va 0x%010Lx conflict with "
513 "(bo %p 0x%010lx 0x%010lx)\n", bo_va
->bo
,
514 soffset
, tmp
->bo
, tmp
->it
.start
, tmp
->it
.last
);
515 mutex_unlock(&vm
->mutex
);
518 bo_va
->it
.start
= soffset
;
519 bo_va
->it
.last
= eoffset
- 1;
520 interval_tree_insert(&bo_va
->it
, &vm
->va
);
523 bo_va
->flags
= flags
;
526 soffset
>>= radeon_vm_block_size
;
527 eoffset
>>= radeon_vm_block_size
;
529 BUG_ON(eoffset
>= radeon_vm_num_pdes(rdev
));
531 if (eoffset
> vm
->max_pde_used
)
532 vm
->max_pde_used
= eoffset
;
534 radeon_bo_unreserve(bo_va
->bo
);
536 /* walk over the address space and allocate the page tables */
537 for (pt_idx
= soffset
; pt_idx
<= eoffset
; ++pt_idx
) {
538 struct radeon_bo
*pt
;
540 if (vm
->page_tables
[pt_idx
].bo
)
543 /* drop mutex to allocate and clear page table */
544 mutex_unlock(&vm
->mutex
);
546 r
= radeon_bo_create(rdev
, RADEON_VM_PTE_COUNT
* 8,
547 RADEON_GPU_PAGE_SIZE
, true,
548 RADEON_GEM_DOMAIN_VRAM
, 0, NULL
, &pt
);
552 r
= radeon_vm_clear_bo(rdev
, pt
);
554 radeon_bo_unref(&pt
);
555 radeon_bo_reserve(bo_va
->bo
, false);
559 /* aquire mutex again */
560 mutex_lock(&vm
->mutex
);
561 if (vm
->page_tables
[pt_idx
].bo
) {
562 /* someone else allocated the pt in the meantime */
563 mutex_unlock(&vm
->mutex
);
564 radeon_bo_unref(&pt
);
565 mutex_lock(&vm
->mutex
);
569 vm
->page_tables
[pt_idx
].addr
= 0;
570 vm
->page_tables
[pt_idx
].bo
= pt
;
573 mutex_unlock(&vm
->mutex
);
574 return radeon_bo_reserve(bo_va
->bo
, false);
578 * radeon_vm_map_gart - get the physical address of a gart page
580 * @rdev: radeon_device pointer
581 * @addr: the unmapped addr
583 * Look up the physical address of the page that the pte resolves
585 * Returns the physical address of the page.
587 uint64_t radeon_vm_map_gart(struct radeon_device
*rdev
, uint64_t addr
)
591 /* page table offset */
592 result
= rdev
->gart
.pages_addr
[addr
>> PAGE_SHIFT
];
594 /* in case cpu page size != gpu page size*/
595 result
|= addr
& (~PAGE_MASK
);
601 * radeon_vm_page_flags - translate page flags to what the hw uses
603 * @flags: flags comming from userspace
605 * Translate the flags the userspace ABI uses to hw flags.
607 static uint32_t radeon_vm_page_flags(uint32_t flags
)
609 uint32_t hw_flags
= 0;
610 hw_flags
|= (flags
& RADEON_VM_PAGE_VALID
) ? R600_PTE_VALID
: 0;
611 hw_flags
|= (flags
& RADEON_VM_PAGE_READABLE
) ? R600_PTE_READABLE
: 0;
612 hw_flags
|= (flags
& RADEON_VM_PAGE_WRITEABLE
) ? R600_PTE_WRITEABLE
: 0;
613 if (flags
& RADEON_VM_PAGE_SYSTEM
) {
614 hw_flags
|= R600_PTE_SYSTEM
;
615 hw_flags
|= (flags
& RADEON_VM_PAGE_SNOOPED
) ? R600_PTE_SNOOPED
: 0;
621 * radeon_vm_update_pdes - make sure that page directory is valid
623 * @rdev: radeon_device pointer
625 * @start: start of GPU address range
626 * @end: end of GPU address range
628 * Allocates new page tables if necessary
629 * and updates the page directory (cayman+).
630 * Returns 0 for success, error for failure.
632 * Global and local mutex must be locked!
634 int radeon_vm_update_page_directory(struct radeon_device
*rdev
,
635 struct radeon_vm
*vm
)
637 struct radeon_bo
*pd
= vm
->page_directory
;
638 uint64_t pd_addr
= radeon_bo_gpu_offset(pd
);
639 uint32_t incr
= RADEON_VM_PTE_COUNT
* 8;
640 uint64_t last_pde
= ~0, last_pt
= ~0;
641 unsigned count
= 0, pt_idx
, ndw
;
648 /* assume the worst case */
649 ndw
+= vm
->max_pde_used
* 6;
651 /* update too big for an IB */
655 r
= radeon_ib_get(rdev
, R600_RING_TYPE_DMA_INDEX
, &ib
, NULL
, ndw
* 4);
660 /* walk over the address space and update the page directory */
661 for (pt_idx
= 0; pt_idx
<= vm
->max_pde_used
; ++pt_idx
) {
662 struct radeon_bo
*bo
= vm
->page_tables
[pt_idx
].bo
;
668 pt
= radeon_bo_gpu_offset(bo
);
669 if (vm
->page_tables
[pt_idx
].addr
== pt
)
671 vm
->page_tables
[pt_idx
].addr
= pt
;
673 pde
= pd_addr
+ pt_idx
* 8;
674 if (((last_pde
+ 8 * count
) != pde
) ||
675 ((last_pt
+ incr
* count
) != pt
)) {
678 radeon_vm_set_pages(rdev
, &ib
, last_pde
,
679 last_pt
, count
, incr
,
692 radeon_vm_set_pages(rdev
, &ib
, last_pde
, last_pt
, count
,
693 incr
, R600_PTE_VALID
);
695 if (ib
.length_dw
!= 0) {
698 radeon_asic_vm_pad_ib(rdev
, &ib
);
700 fence
= reservation_object_get_excl(pd
->tbo
.resv
);
701 radeon_semaphore_sync_to(ib
.semaphore
,
702 (struct radeon_fence
*)fence
);
704 radeon_semaphore_sync_to(ib
.semaphore
, vm
->last_id_use
);
705 WARN_ON(ib
.length_dw
> ndw
);
706 r
= radeon_ib_schedule(rdev
, &ib
, NULL
, false);
708 radeon_ib_free(rdev
, &ib
);
711 radeon_fence_unref(&vm
->fence
);
712 vm
->fence
= radeon_fence_ref(ib
.fence
);
713 radeon_fence_unref(&vm
->last_flush
);
715 radeon_ib_free(rdev
, &ib
);
721 * radeon_vm_frag_ptes - add fragment information to PTEs
723 * @rdev: radeon_device pointer
724 * @ib: IB for the update
725 * @pe_start: first PTE to handle
726 * @pe_end: last PTE to handle
727 * @addr: addr those PTEs should point to
728 * @flags: hw mapping flags
730 * Global and local mutex must be locked!
732 static void radeon_vm_frag_ptes(struct radeon_device
*rdev
,
733 struct radeon_ib
*ib
,
734 uint64_t pe_start
, uint64_t pe_end
,
735 uint64_t addr
, uint32_t flags
)
738 * The MC L1 TLB supports variable sized pages, based on a fragment
739 * field in the PTE. When this field is set to a non-zero value, page
740 * granularity is increased from 4KB to (1 << (12 + frag)). The PTE
741 * flags are considered valid for all PTEs within the fragment range
742 * and corresponding mappings are assumed to be physically contiguous.
744 * The L1 TLB can store a single PTE for the whole fragment,
745 * significantly increasing the space available for translation
746 * caching. This leads to large improvements in throughput when the
747 * TLB is under pressure.
749 * The L2 TLB distributes small and large fragments into two
750 * asymmetric partitions. The large fragment cache is significantly
751 * larger. Thus, we try to use large fragments wherever possible.
752 * Userspace can support this by aligning virtual base address and
753 * allocation size to the fragment size.
756 /* NI is optimized for 256KB fragments, SI and newer for 64KB */
757 uint64_t frag_flags
= rdev
->family
== CHIP_CAYMAN
?
758 R600_PTE_FRAG_256KB
: R600_PTE_FRAG_64KB
;
759 uint64_t frag_align
= rdev
->family
== CHIP_CAYMAN
? 0x200 : 0x80;
761 uint64_t frag_start
= ALIGN(pe_start
, frag_align
);
762 uint64_t frag_end
= pe_end
& ~(frag_align
- 1);
766 /* system pages are non continuously */
767 if ((flags
& R600_PTE_SYSTEM
) || !(flags
& R600_PTE_VALID
) ||
768 (frag_start
>= frag_end
)) {
770 count
= (pe_end
- pe_start
) / 8;
771 radeon_vm_set_pages(rdev
, ib
, pe_start
, addr
, count
,
772 RADEON_GPU_PAGE_SIZE
, flags
);
776 /* handle the 4K area at the beginning */
777 if (pe_start
!= frag_start
) {
778 count
= (frag_start
- pe_start
) / 8;
779 radeon_vm_set_pages(rdev
, ib
, pe_start
, addr
, count
,
780 RADEON_GPU_PAGE_SIZE
, flags
);
781 addr
+= RADEON_GPU_PAGE_SIZE
* count
;
784 /* handle the area in the middle */
785 count
= (frag_end
- frag_start
) / 8;
786 radeon_vm_set_pages(rdev
, ib
, frag_start
, addr
, count
,
787 RADEON_GPU_PAGE_SIZE
, flags
| frag_flags
);
789 /* handle the 4K area at the end */
790 if (frag_end
!= pe_end
) {
791 addr
+= RADEON_GPU_PAGE_SIZE
* count
;
792 count
= (pe_end
- frag_end
) / 8;
793 radeon_vm_set_pages(rdev
, ib
, frag_end
, addr
, count
,
794 RADEON_GPU_PAGE_SIZE
, flags
);
799 * radeon_vm_update_ptes - make sure that page tables are valid
801 * @rdev: radeon_device pointer
803 * @start: start of GPU address range
804 * @end: end of GPU address range
805 * @dst: destination address to map to
806 * @flags: mapping flags
808 * Update the page tables in the range @start - @end (cayman+).
810 * Global and local mutex must be locked!
812 static void radeon_vm_update_ptes(struct radeon_device
*rdev
,
813 struct radeon_vm
*vm
,
814 struct radeon_ib
*ib
,
815 uint64_t start
, uint64_t end
,
816 uint64_t dst
, uint32_t flags
)
818 uint64_t mask
= RADEON_VM_PTE_COUNT
- 1;
819 uint64_t last_pte
= ~0, last_dst
= ~0;
823 /* walk over the address space and update the page tables */
824 for (addr
= start
; addr
< end
; ) {
825 uint64_t pt_idx
= addr
>> radeon_vm_block_size
;
826 struct radeon_bo
*pt
= vm
->page_tables
[pt_idx
].bo
;
831 fence
= reservation_object_get_excl(pt
->tbo
.resv
);
832 radeon_semaphore_sync_to(ib
->semaphore
,
833 (struct radeon_fence
*)fence
);
835 if ((addr
& ~mask
) == (end
& ~mask
))
838 nptes
= RADEON_VM_PTE_COUNT
- (addr
& mask
);
840 pte
= radeon_bo_gpu_offset(pt
);
841 pte
+= (addr
& mask
) * 8;
843 if ((last_pte
+ 8 * count
) != pte
) {
846 radeon_vm_frag_ptes(rdev
, ib
, last_pte
,
847 last_pte
+ 8 * count
,
859 dst
+= nptes
* RADEON_GPU_PAGE_SIZE
;
863 radeon_vm_frag_ptes(rdev
, ib
, last_pte
,
864 last_pte
+ 8 * count
,
870 * radeon_vm_bo_update - map a bo into the vm page table
872 * @rdev: radeon_device pointer
874 * @bo: radeon buffer object
877 * Fill in the page table entries for @bo (cayman+).
878 * Returns 0 for success, -EINVAL for failure.
880 * Object have to be reserved and mutex must be locked!
882 int radeon_vm_bo_update(struct radeon_device
*rdev
,
883 struct radeon_bo_va
*bo_va
,
884 struct ttm_mem_reg
*mem
)
886 struct radeon_vm
*vm
= bo_va
->vm
;
888 unsigned nptes
, ncmds
, ndw
;
893 if (!bo_va
->it
.start
) {
894 dev_err(rdev
->dev
, "bo %p don't has a mapping in vm %p\n",
899 list_del_init(&bo_va
->vm_status
);
901 bo_va
->flags
&= ~RADEON_VM_PAGE_VALID
;
902 bo_va
->flags
&= ~RADEON_VM_PAGE_SYSTEM
;
903 bo_va
->flags
&= ~RADEON_VM_PAGE_SNOOPED
;
904 if (bo_va
->bo
&& radeon_ttm_tt_is_readonly(bo_va
->bo
->tbo
.ttm
))
905 bo_va
->flags
&= ~RADEON_VM_PAGE_WRITEABLE
;
908 addr
= mem
->start
<< PAGE_SHIFT
;
909 if (mem
->mem_type
!= TTM_PL_SYSTEM
) {
910 bo_va
->flags
|= RADEON_VM_PAGE_VALID
;
912 if (mem
->mem_type
== TTM_PL_TT
) {
913 bo_va
->flags
|= RADEON_VM_PAGE_SYSTEM
;
914 if (!(bo_va
->bo
->flags
& (RADEON_GEM_GTT_WC
| RADEON_GEM_GTT_UC
)))
915 bo_va
->flags
|= RADEON_VM_PAGE_SNOOPED
;
918 addr
+= rdev
->vm_manager
.vram_base_offset
;
924 if (addr
== bo_va
->addr
)
928 trace_radeon_vm_bo_update(bo_va
);
930 nptes
= bo_va
->it
.last
- bo_va
->it
.start
+ 1;
932 /* reserve space for one command every (1 << BLOCK_SIZE) entries
933 or 2k dwords (whatever is smaller) */
934 ncmds
= (nptes
>> min(radeon_vm_block_size
, 11)) + 1;
939 flags
= radeon_vm_page_flags(bo_va
->flags
);
940 if ((flags
& R600_PTE_GART_MASK
) == R600_PTE_GART_MASK
) {
941 /* only copy commands needed */
944 } else if (flags
& R600_PTE_SYSTEM
) {
945 /* header for write data commands */
948 /* body of write data command */
952 /* set page commands needed */
955 /* two extra commands for begin/end of fragment */
959 /* update too big for an IB */
963 r
= radeon_ib_get(rdev
, R600_RING_TYPE_DMA_INDEX
, &ib
, NULL
, ndw
* 4);
968 radeon_vm_update_ptes(rdev
, vm
, &ib
, bo_va
->it
.start
,
969 bo_va
->it
.last
+ 1, addr
,
970 radeon_vm_page_flags(bo_va
->flags
));
972 radeon_asic_vm_pad_ib(rdev
, &ib
);
973 WARN_ON(ib
.length_dw
> ndw
);
975 radeon_semaphore_sync_to(ib
.semaphore
, vm
->fence
);
976 r
= radeon_ib_schedule(rdev
, &ib
, NULL
, false);
978 radeon_ib_free(rdev
, &ib
);
981 radeon_fence_unref(&vm
->fence
);
982 vm
->fence
= radeon_fence_ref(ib
.fence
);
983 radeon_ib_free(rdev
, &ib
);
984 radeon_fence_unref(&vm
->last_flush
);
990 * radeon_vm_clear_freed - clear freed BOs in the PT
992 * @rdev: radeon_device pointer
995 * Make sure all freed BOs are cleared in the PT.
996 * Returns 0 for success.
998 * PTs have to be reserved and mutex must be locked!
1000 int radeon_vm_clear_freed(struct radeon_device
*rdev
,
1001 struct radeon_vm
*vm
)
1003 struct radeon_bo_va
*bo_va
, *tmp
;
1006 list_for_each_entry_safe(bo_va
, tmp
, &vm
->freed
, vm_status
) {
1007 r
= radeon_vm_bo_update(rdev
, bo_va
, NULL
);
1008 radeon_bo_unref(&bo_va
->bo
);
1018 * radeon_vm_clear_invalids - clear invalidated BOs in the PT
1020 * @rdev: radeon_device pointer
1023 * Make sure all invalidated BOs are cleared in the PT.
1024 * Returns 0 for success.
1026 * PTs have to be reserved and mutex must be locked!
1028 int radeon_vm_clear_invalids(struct radeon_device
*rdev
,
1029 struct radeon_vm
*vm
)
1031 struct radeon_bo_va
*bo_va
, *tmp
;
1034 list_for_each_entry_safe(bo_va
, tmp
, &vm
->invalidated
, vm_status
) {
1035 r
= radeon_vm_bo_update(rdev
, bo_va
, NULL
);
1043 * radeon_vm_bo_rmv - remove a bo to a specific vm
1045 * @rdev: radeon_device pointer
1046 * @bo_va: requested bo_va
1048 * Remove @bo_va->bo from the requested vm (cayman+).
1050 * Object have to be reserved!
1052 void radeon_vm_bo_rmv(struct radeon_device
*rdev
,
1053 struct radeon_bo_va
*bo_va
)
1055 struct radeon_vm
*vm
= bo_va
->vm
;
1057 list_del(&bo_va
->bo_list
);
1059 mutex_lock(&vm
->mutex
);
1060 interval_tree_remove(&bo_va
->it
, &vm
->va
);
1061 list_del(&bo_va
->vm_status
);
1064 bo_va
->bo
= radeon_bo_ref(bo_va
->bo
);
1065 list_add(&bo_va
->vm_status
, &vm
->freed
);
1070 mutex_unlock(&vm
->mutex
);
1074 * radeon_vm_bo_invalidate - mark the bo as invalid
1076 * @rdev: radeon_device pointer
1078 * @bo: radeon buffer object
1080 * Mark @bo as invalid (cayman+).
1082 void radeon_vm_bo_invalidate(struct radeon_device
*rdev
,
1083 struct radeon_bo
*bo
)
1085 struct radeon_bo_va
*bo_va
;
1087 list_for_each_entry(bo_va
, &bo
->va
, bo_list
) {
1089 mutex_lock(&bo_va
->vm
->mutex
);
1090 list_del(&bo_va
->vm_status
);
1091 list_add(&bo_va
->vm_status
, &bo_va
->vm
->invalidated
);
1092 mutex_unlock(&bo_va
->vm
->mutex
);
1098 * radeon_vm_init - initialize a vm instance
1100 * @rdev: radeon_device pointer
1103 * Init @vm fields (cayman+).
1105 int radeon_vm_init(struct radeon_device
*rdev
, struct radeon_vm
*vm
)
1107 const unsigned align
= min(RADEON_VM_PTB_ALIGN_SIZE
,
1108 RADEON_VM_PTE_COUNT
* 8);
1109 unsigned pd_size
, pd_entries
, pts_size
;
1113 vm
->ib_bo_va
= NULL
;
1115 vm
->last_flush
= NULL
;
1116 vm
->last_id_use
= NULL
;
1117 mutex_init(&vm
->mutex
);
1119 INIT_LIST_HEAD(&vm
->invalidated
);
1120 INIT_LIST_HEAD(&vm
->freed
);
1122 pd_size
= radeon_vm_directory_size(rdev
);
1123 pd_entries
= radeon_vm_num_pdes(rdev
);
1125 /* allocate page table array */
1126 pts_size
= pd_entries
* sizeof(struct radeon_vm_pt
);
1127 vm
->page_tables
= kzalloc(pts_size
, GFP_KERNEL
);
1128 if (vm
->page_tables
== NULL
) {
1129 DRM_ERROR("Cannot allocate memory for page table array\n");
1133 r
= radeon_bo_create(rdev
, pd_size
, align
, true,
1134 RADEON_GEM_DOMAIN_VRAM
, 0, NULL
,
1135 &vm
->page_directory
);
1139 r
= radeon_vm_clear_bo(rdev
, vm
->page_directory
);
1141 radeon_bo_unref(&vm
->page_directory
);
1142 vm
->page_directory
= NULL
;
1150 * radeon_vm_fini - tear down a vm instance
1152 * @rdev: radeon_device pointer
1155 * Tear down @vm (cayman+).
1156 * Unbind the VM and remove all bos from the vm bo list
1158 void radeon_vm_fini(struct radeon_device
*rdev
, struct radeon_vm
*vm
)
1160 struct radeon_bo_va
*bo_va
, *tmp
;
1163 if (!RB_EMPTY_ROOT(&vm
->va
)) {
1164 dev_err(rdev
->dev
, "still active bo inside vm\n");
1166 rbtree_postorder_for_each_entry_safe(bo_va
, tmp
, &vm
->va
, it
.rb
) {
1167 interval_tree_remove(&bo_va
->it
, &vm
->va
);
1168 r
= radeon_bo_reserve(bo_va
->bo
, false);
1170 list_del_init(&bo_va
->bo_list
);
1171 radeon_bo_unreserve(bo_va
->bo
);
1175 list_for_each_entry_safe(bo_va
, tmp
, &vm
->freed
, vm_status
) {
1176 radeon_bo_unref(&bo_va
->bo
);
1180 for (i
= 0; i
< radeon_vm_num_pdes(rdev
); i
++)
1181 radeon_bo_unref(&vm
->page_tables
[i
].bo
);
1182 kfree(vm
->page_tables
);
1184 radeon_bo_unref(&vm
->page_directory
);
1186 radeon_fence_unref(&vm
->fence
);
1187 radeon_fence_unref(&vm
->last_flush
);
1188 radeon_fence_unref(&vm
->last_id_use
);
1190 mutex_destroy(&vm
->mutex
);
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