1/*
2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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.
23 *
24 * Authors: Dave Airlie
25 * Alex Deucher
26 * Jerome Glisse
27 */
28#include <drm/drmP.h>
29#include <drm/radeon_drm.h>
30#include "radeon.h"
31#include "radeon_trace.h"
32
33/*
34 * GPUVM
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;
50 * SI supports 16.
51 */
52
53/**
54 * radeon_vm_num_pde - return the number of page directory entries
55 *
56 * @rdev: radeon_device pointer
57 *
58 * Calculate the number of page directory entries (cayman+).
59 */
60static unsigned radeon_vm_num_pdes(struct radeon_device *rdev)
61{
62 return rdev->vm_manager.max_pfn >> radeon_vm_block_size;
63}
64
65/**
66 * radeon_vm_directory_size - returns the size of the page directory in bytes
67 *
68 * @rdev: radeon_device pointer
69 *
70 * Calculate the size of the page directory in bytes (cayman+).
71 */
72static unsigned radeon_vm_directory_size(struct radeon_device *rdev)
73{
74 return RADEON_GPU_PAGE_ALIGN(radeon_vm_num_pdes(rdev) * 8);
75}
76
77/**
78 * radeon_vm_manager_init - init the vm manager
79 *
80 * @rdev: radeon_device pointer
81 *
82 * Init the vm manager (cayman+).
83 * Returns 0 for success, error for failure.
84 */
85int radeon_vm_manager_init(struct radeon_device *rdev)
86{
87 int r;
88
89 if (!rdev->vm_manager.enabled) {
90 r = radeon_asic_vm_init(rdev);
91 if (r)
92 return r;
93
94 rdev->vm_manager.enabled = true;
95 }
96 return 0;
97}
98
99/**
100 * radeon_vm_manager_fini - tear down the vm manager
101 *
102 * @rdev: radeon_device pointer
103 *
104 * Tear down the VM manager (cayman+).
105 */
106void radeon_vm_manager_fini(struct radeon_device *rdev)
107{
108 int i;
109
110 if (!rdev->vm_manager.enabled)
111 return;
112
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;
117}
118
119/**
120 * radeon_vm_get_bos - add the vm BOs to a validation list
121 *
122 * @vm: vm providing the BOs
123 * @head: head of validation list
124 *
125 * Add the page directory to the list of BOs to
126 * validate for command submission (cayman+).
127 */
128struct radeon_bo_list *radeon_vm_get_bos(struct radeon_device *rdev,
129 struct radeon_vm *vm,
130 struct list_head *head)
131{
132 struct radeon_bo_list *list;
133 unsigned i, idx;
134
135 list = kvmalloc_array(vm->max_pde_used + 2,
136 sizeof(struct radeon_bo_list), GFP_KERNEL);
137 if (!list)
138 return NULL;
139
140 /* add the vm page table to the list */
141 list[0].robj = vm->page_directory;
142 list[0].preferred_domains = RADEON_GEM_DOMAIN_VRAM;
143 list[0].allowed_domains = RADEON_GEM_DOMAIN_VRAM;
144 list[0].tv.bo = &vm->page_directory->tbo;
145 list[0].tv.num_shared = 1;
146 list[0].tiling_flags = 0;
147 list_add(&list[0].tv.head, head);
148
149 for (i = 0, idx = 1; i <= vm->max_pde_used; i++) {
150 if (!vm->page_tables[i].bo)
151 continue;
152
153 list[idx].robj = vm->page_tables[i].bo;
154 list[idx].preferred_domains = RADEON_GEM_DOMAIN_VRAM;
155 list[idx].allowed_domains = RADEON_GEM_DOMAIN_VRAM;
156 list[idx].tv.bo = &list[idx].robj->tbo;
157 list[idx].tv.num_shared = 1;
158 list[idx].tiling_flags = 0;
159 list_add(&list[idx++].tv.head, head);
160 }
161
162 return list;
163}
164
165/**
166 * radeon_vm_grab_id - allocate the next free VMID
167 *
168 * @rdev: radeon_device pointer
169 * @vm: vm to allocate id for
170 * @ring: ring we want to submit job to
171 *
172 * Allocate an id for the vm (cayman+).
173 * Returns the fence we need to sync to (if any).
174 *
175 * Global and local mutex must be locked!
176 */
177struct radeon_fence *radeon_vm_grab_id(struct radeon_device *rdev,
178 struct radeon_vm *vm, int ring)
179{
180 struct radeon_fence *best[RADEON_NUM_RINGS] = {};
181 struct radeon_vm_id *vm_id = &vm->ids[ring];
182
183 unsigned choices[2] = {};
184 unsigned i;
185
186 /* check if the id is still valid */
187 if (vm_id->id && vm_id->last_id_use &&
188 vm_id->last_id_use == rdev->vm_manager.active[vm_id->id])
189 return NULL;
190
191 /* we definately need to flush */
192 vm_id->pd_gpu_addr = ~0ll;
193
194 /* skip over VMID 0, since it is the system VM */
195 for (i = 1; i < rdev->vm_manager.nvm; ++i) {
196 struct radeon_fence *fence = rdev->vm_manager.active[i];
197
198 if (fence == NULL) {
199 /* found a free one */
200 vm_id->id = i;
201 trace_radeon_vm_grab_id(i, ring);
202 return NULL;
203 }
204
205 if (radeon_fence_is_earlier(fence, best[fence->ring])) {
206 best[fence->ring] = fence;
207 choices[fence->ring == ring ? 0 : 1] = i;
208 }
209 }
210
211 for (i = 0; i < 2; ++i) {
212 if (choices[i]) {
213 vm_id->id = choices[i];
214 trace_radeon_vm_grab_id(choices[i], ring);
215 return rdev->vm_manager.active[choices[i]];
216 }
217 }
218
219 /* should never happen */
220 BUG();
221 return NULL;
222}
223
224/**
225 * radeon_vm_flush - hardware flush the vm
226 *
227 * @rdev: radeon_device pointer
228 * @vm: vm we want to flush
229 * @ring: ring to use for flush
230 * @updates: last vm update that is waited for
231 *
232 * Flush the vm (cayman+).
233 *
234 * Global and local mutex must be locked!
235 */
236void radeon_vm_flush(struct radeon_device *rdev,
237 struct radeon_vm *vm,
238 int ring, struct radeon_fence *updates)
239{
240 uint64_t pd_addr = radeon_bo_gpu_offset(vm->page_directory);
241 struct radeon_vm_id *vm_id = &vm->ids[ring];
242
243 if (pd_addr != vm_id->pd_gpu_addr || !vm_id->flushed_updates ||
244 radeon_fence_is_earlier(vm_id->flushed_updates, updates)) {
245
246 trace_radeon_vm_flush(pd_addr, ring, vm->ids[ring].id);
247 radeon_fence_unref(&vm_id->flushed_updates);
248 vm_id->flushed_updates = radeon_fence_ref(updates);
249 vm_id->pd_gpu_addr = pd_addr;
250 radeon_ring_vm_flush(rdev, &rdev->ring[ring],
251 vm_id->id, vm_id->pd_gpu_addr);
252
253 }
254}
255
256/**
257 * radeon_vm_fence - remember fence for vm
258 *
259 * @rdev: radeon_device pointer
260 * @vm: vm we want to fence
261 * @fence: fence to remember
262 *
263 * Fence the vm (cayman+).
264 * Set the fence used to protect page table and id.
265 *
266 * Global and local mutex must be locked!
267 */
268void radeon_vm_fence(struct radeon_device *rdev,
269 struct radeon_vm *vm,
270 struct radeon_fence *fence)
271{
272 unsigned vm_id = vm->ids[fence->ring].id;
273
274 radeon_fence_unref(&rdev->vm_manager.active[vm_id]);
275 rdev->vm_manager.active[vm_id] = radeon_fence_ref(fence);
276
277 radeon_fence_unref(&vm->ids[fence->ring].last_id_use);
278 vm->ids[fence->ring].last_id_use = radeon_fence_ref(fence);
279}
280
281/**
282 * radeon_vm_bo_find - find the bo_va for a specific vm & bo
283 *
284 * @vm: requested vm
285 * @bo: requested buffer object
286 *
287 * Find @bo inside the requested vm (cayman+).
288 * Search inside the @bos vm list for the requested vm
289 * Returns the found bo_va or NULL if none is found
290 *
291 * Object has to be reserved!
292 */
293struct radeon_bo_va *radeon_vm_bo_find(struct radeon_vm *vm,
294 struct radeon_bo *bo)
295{
296 struct radeon_bo_va *bo_va;
297
298 list_for_each_entry(bo_va, &bo->va, bo_list) {
299 if (bo_va->vm == vm) {
300 return bo_va;
301 }
302 }
303 return NULL;
304}
305
306/**
307 * radeon_vm_bo_add - add a bo to a specific vm
308 *
309 * @rdev: radeon_device pointer
310 * @vm: requested vm
311 * @bo: radeon buffer object
312 *
313 * Add @bo into the requested vm (cayman+).
314 * Add @bo to the list of bos associated with the vm
315 * Returns newly added bo_va or NULL for failure
316 *
317 * Object has to be reserved!
318 */
319struct radeon_bo_va *radeon_vm_bo_add(struct radeon_device *rdev,
320 struct radeon_vm *vm,
321 struct radeon_bo *bo)
322{
323 struct radeon_bo_va *bo_va;
324
325 bo_va = kzalloc(sizeof(struct radeon_bo_va), GFP_KERNEL);
326 if (bo_va == NULL) {
327 return NULL;
328 }
329 bo_va->vm = vm;
330 bo_va->bo = bo;
331 bo_va->it.start = 0;
332 bo_va->it.last = 0;
333 bo_va->flags = 0;
334 bo_va->ref_count = 1;
335 INIT_LIST_HEAD(&bo_va->bo_list);
336 INIT_LIST_HEAD(&bo_va->vm_status);
337
338 mutex_lock(&vm->mutex);
339 list_add_tail(&bo_va->bo_list, &bo->va);
340 mutex_unlock(&vm->mutex);
341
342 return bo_va;
343}
344
345/**
346 * radeon_vm_set_pages - helper to call the right asic function
347 *
348 * @rdev: radeon_device pointer
349 * @ib: indirect buffer to fill with commands
350 * @pe: addr of the page entry
351 * @addr: dst addr to write into pe
352 * @count: number of page entries to update
353 * @incr: increase next addr by incr bytes
354 * @flags: hw access flags
355 *
356 * Traces the parameters and calls the right asic functions
357 * to setup the page table using the DMA.
358 */
359static void radeon_vm_set_pages(struct radeon_device *rdev,
360 struct radeon_ib *ib,
361 uint64_t pe,
362 uint64_t addr, unsigned count,
363 uint32_t incr, uint32_t flags)
364{
365 trace_radeon_vm_set_page(pe, addr, count, incr, flags);
366
367 if ((flags & R600_PTE_GART_MASK) == R600_PTE_GART_MASK) {
368 uint64_t src = rdev->gart.table_addr + (addr >> 12) * 8;
369 radeon_asic_vm_copy_pages(rdev, ib, pe, src, count);
370
371 } else if ((flags & R600_PTE_SYSTEM) || (count < 3)) {
372 radeon_asic_vm_write_pages(rdev, ib, pe, addr,
373 count, incr, flags);
374
375 } else {
376 radeon_asic_vm_set_pages(rdev, ib, pe, addr,
377 count, incr, flags);
378 }
379}
380
381/**
382 * radeon_vm_clear_bo - initially clear the page dir/table
383 *
384 * @rdev: radeon_device pointer
385 * @bo: bo to clear
386 */
387static int radeon_vm_clear_bo(struct radeon_device *rdev,
388 struct radeon_bo *bo)
389{
390 struct ttm_operation_ctx ctx = { true, false };
391 struct radeon_ib ib;
392 unsigned entries;
393 uint64_t addr;
394 int r;
395
396 r = radeon_bo_reserve(bo, false);
397 if (r)
398 return r;
399
400 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
401 if (r)
402 goto error_unreserve;
403
404 addr = radeon_bo_gpu_offset(bo);
405 entries = radeon_bo_size(bo) / 8;
406
407 r = radeon_ib_get(rdev, R600_RING_TYPE_DMA_INDEX, &ib, NULL, 256);
408 if (r)
409 goto error_unreserve;
410
411 ib.length_dw = 0;
412
413 radeon_vm_set_pages(rdev, &ib, addr, 0, entries, 0, 0);
414 radeon_asic_vm_pad_ib(rdev, &ib);
415 WARN_ON(ib.length_dw > 64);
416
417 r = radeon_ib_schedule(rdev, &ib, NULL, false);
418 if (r)
419 goto error_free;
420
421 ib.fence->is_vm_update = true;
422 radeon_bo_fence(bo, ib.fence, false);
423
424error_free:
425 radeon_ib_free(rdev, &ib);
426
427error_unreserve:
428 radeon_bo_unreserve(bo);
429 return r;
430}
431
432/**
433 * radeon_vm_bo_set_addr - set bos virtual address inside a vm
434 *
435 * @rdev: radeon_device pointer
436 * @bo_va: bo_va to store the address
437 * @soffset: requested offset of the buffer in the VM address space
438 * @flags: attributes of pages (read/write/valid/etc.)
439 *
440 * Set offset of @bo_va (cayman+).
441 * Validate and set the offset requested within the vm address space.
442 * Returns 0 for success, error for failure.
443 *
444 * Object has to be reserved and gets unreserved by this function!
445 */
446int radeon_vm_bo_set_addr(struct radeon_device *rdev,
447 struct radeon_bo_va *bo_va,
448 uint64_t soffset,
449 uint32_t flags)
450{
451 uint64_t size = radeon_bo_size(bo_va->bo);
452 struct radeon_vm *vm = bo_va->vm;
453 unsigned last_pfn, pt_idx;
454 uint64_t eoffset;
455 int r;
456
457 if (soffset) {
458 /* make sure object fit at this offset */
459 eoffset = soffset + size - 1;
460 if (soffset >= eoffset) {
461 r = -EINVAL;
462 goto error_unreserve;
463 }
464
465 last_pfn = eoffset / RADEON_GPU_PAGE_SIZE;
466 if (last_pfn >= rdev->vm_manager.max_pfn) {
467 dev_err(rdev->dev, "va above limit (0x%08X >= 0x%08X)\n",
468 last_pfn, rdev->vm_manager.max_pfn);
469 r = -EINVAL;
470 goto error_unreserve;
471 }
472
473 } else {
474 eoffset = last_pfn = 0;
475 }
476
477 mutex_lock(&vm->mutex);
478 soffset /= RADEON_GPU_PAGE_SIZE;
479 eoffset /= RADEON_GPU_PAGE_SIZE;
480 if (soffset || eoffset) {
481 struct interval_tree_node *it;
482 it = interval_tree_iter_first(&vm->va, soffset, eoffset);
483 if (it && it != &bo_va->it) {
484 struct radeon_bo_va *tmp;
485 tmp = container_of(it, struct radeon_bo_va, it);
486 /* bo and tmp overlap, invalid offset */
487 dev_err(rdev->dev, "bo %p va 0x%010Lx conflict with "
488 "(bo %p 0x%010lx 0x%010lx)\n", bo_va->bo,
489 soffset, tmp->bo, tmp->it.start, tmp->it.last);
490 mutex_unlock(&vm->mutex);
491 r = -EINVAL;
492 goto error_unreserve;
493 }
494 }
495
496 if (bo_va->it.start || bo_va->it.last) {
497 /* add a clone of the bo_va to clear the old address */
498 struct radeon_bo_va *tmp;
499 tmp = kzalloc(sizeof(struct radeon_bo_va), GFP_KERNEL);
500 if (!tmp) {
501 mutex_unlock(&vm->mutex);
502 r = -ENOMEM;
503 goto error_unreserve;
504 }
505 tmp->it.start = bo_va->it.start;
506 tmp->it.last = bo_va->it.last;
507 tmp->vm = vm;
508 tmp->bo = radeon_bo_ref(bo_va->bo);
509
510 interval_tree_remove(&bo_va->it, &vm->va);
511 spin_lock(&vm->status_lock);
512 bo_va->it.start = 0;
513 bo_va->it.last = 0;
514 list_del_init(&bo_va->vm_status);
515 list_add(&tmp->vm_status, &vm->freed);
516 spin_unlock(&vm->status_lock);
517 }
518
519 if (soffset || eoffset) {
520 spin_lock(&vm->status_lock);
521 bo_va->it.start = soffset;
522 bo_va->it.last = eoffset;
523 list_add(&bo_va->vm_status, &vm->cleared);
524 spin_unlock(&vm->status_lock);
525 interval_tree_insert(&bo_va->it, &vm->va);
526 }
527
528 bo_va->flags = flags;
529
530 soffset >>= radeon_vm_block_size;
531 eoffset >>= radeon_vm_block_size;
532
533 BUG_ON(eoffset >= radeon_vm_num_pdes(rdev));
534
535 if (eoffset > vm->max_pde_used)
536 vm->max_pde_used = eoffset;
537
538 radeon_bo_unreserve(bo_va->bo);
539
540 /* walk over the address space and allocate the page tables */
541 for (pt_idx = soffset; pt_idx <= eoffset; ++pt_idx) {
542 struct radeon_bo *pt;
543
544 if (vm->page_tables[pt_idx].bo)
545 continue;
546
547 /* drop mutex to allocate and clear page table */
548 mutex_unlock(&vm->mutex);
549
550 r = radeon_bo_create(rdev, RADEON_VM_PTE_COUNT * 8,
551 RADEON_GPU_PAGE_SIZE, true,
552 RADEON_GEM_DOMAIN_VRAM, 0,
553 NULL, NULL, &pt);
554 if (r)
555 return r;
556
557 r = radeon_vm_clear_bo(rdev, pt);
558 if (r) {
559 radeon_bo_unref(&pt);
560 return r;
561 }
562
563 /* aquire mutex again */
564 mutex_lock(&vm->mutex);
565 if (vm->page_tables[pt_idx].bo) {
566 /* someone else allocated the pt in the meantime */
567 mutex_unlock(&vm->mutex);
568 radeon_bo_unref(&pt);
569 mutex_lock(&vm->mutex);
570 continue;
571 }
572
573 vm->page_tables[pt_idx].addr = 0;
574 vm->page_tables[pt_idx].bo = pt;
575 }
576
577 mutex_unlock(&vm->mutex);
578 return 0;
579
580error_unreserve:
581 radeon_bo_unreserve(bo_va->bo);
582 return r;
583}
584
585/**
586 * radeon_vm_map_gart - get the physical address of a gart page
587 *
588 * @rdev: radeon_device pointer
589 * @addr: the unmapped addr
590 *
591 * Look up the physical address of the page that the pte resolves
592 * to (cayman+).
593 * Returns the physical address of the page.
594 */
595uint64_t radeon_vm_map_gart(struct radeon_device *rdev, uint64_t addr)
596{
597 uint64_t result;
598
599 /* page table offset */
600 result = rdev->gart.pages_entry[addr >> RADEON_GPU_PAGE_SHIFT];
601 result &= ~RADEON_GPU_PAGE_MASK;
602
603 return result;
604}
605
606/**
607 * radeon_vm_page_flags - translate page flags to what the hw uses
608 *
609 * @flags: flags comming from userspace
610 *
611 * Translate the flags the userspace ABI uses to hw flags.
612 */
613static uint32_t radeon_vm_page_flags(uint32_t flags)
614{
615 uint32_t hw_flags = 0;
616
617 hw_flags |= (flags & RADEON_VM_PAGE_VALID) ? R600_PTE_VALID : 0;
618 hw_flags |= (flags & RADEON_VM_PAGE_READABLE) ? R600_PTE_READABLE : 0;
619 hw_flags |= (flags & RADEON_VM_PAGE_WRITEABLE) ? R600_PTE_WRITEABLE : 0;
620 if (flags & RADEON_VM_PAGE_SYSTEM) {
621 hw_flags |= R600_PTE_SYSTEM;
622 hw_flags |= (flags & RADEON_VM_PAGE_SNOOPED) ? R600_PTE_SNOOPED : 0;
623 }
624 return hw_flags;
625}
626
627/**
628 * radeon_vm_update_pdes - make sure that page directory is valid
629 *
630 * @rdev: radeon_device pointer
631 * @vm: requested vm
632 * @start: start of GPU address range
633 * @end: end of GPU address range
634 *
635 * Allocates new page tables if necessary
636 * and updates the page directory (cayman+).
637 * Returns 0 for success, error for failure.
638 *
639 * Global and local mutex must be locked!
640 */
641int radeon_vm_update_page_directory(struct radeon_device *rdev,
642 struct radeon_vm *vm)
643{
644 struct radeon_bo *pd = vm->page_directory;
645 uint64_t pd_addr = radeon_bo_gpu_offset(pd);
646 uint32_t incr = RADEON_VM_PTE_COUNT * 8;
647 uint64_t last_pde = ~0, last_pt = ~0;
648 unsigned count = 0, pt_idx, ndw;
649 struct radeon_ib ib;
650 int r;
651
652 /* padding, etc. */
653 ndw = 64;
654
655 /* assume the worst case */
656 ndw += vm->max_pde_used * 6;
657
658 /* update too big for an IB */
659 if (ndw > 0xfffff)
660 return -ENOMEM;
661
662 r = radeon_ib_get(rdev, R600_RING_TYPE_DMA_INDEX, &ib, NULL, ndw * 4);
663 if (r)
664 return r;
665 ib.length_dw = 0;
666
667 /* walk over the address space and update the page directory */
668 for (pt_idx = 0; pt_idx <= vm->max_pde_used; ++pt_idx) {
669 struct radeon_bo *bo = vm->page_tables[pt_idx].bo;
670 uint64_t pde, pt;
671
672 if (bo == NULL)
673 continue;
674
675 pt = radeon_bo_gpu_offset(bo);
676 if (vm->page_tables[pt_idx].addr == pt)
677 continue;
678 vm->page_tables[pt_idx].addr = pt;
679
680 pde = pd_addr + pt_idx * 8;
681 if (((last_pde + 8 * count) != pde) ||
682 ((last_pt + incr * count) != pt)) {
683
684 if (count) {
685 radeon_vm_set_pages(rdev, &ib, last_pde,
686 last_pt, count, incr,
687 R600_PTE_VALID);
688 }
689
690 count = 1;
691 last_pde = pde;
692 last_pt = pt;
693 } else {
694 ++count;
695 }
696 }
697
698 if (count)
699 radeon_vm_set_pages(rdev, &ib, last_pde, last_pt, count,
700 incr, R600_PTE_VALID);
701
702 if (ib.length_dw != 0) {
703 radeon_asic_vm_pad_ib(rdev, &ib);
704
705 radeon_sync_resv(rdev, &ib.sync, pd->tbo.resv, true);
706 WARN_ON(ib.length_dw > ndw);
707 r = radeon_ib_schedule(rdev, &ib, NULL, false);
708 if (r) {
709 radeon_ib_free(rdev, &ib);
710 return r;
711 }
712 ib.fence->is_vm_update = true;
713 radeon_bo_fence(pd, ib.fence, false);
714 }
715 radeon_ib_free(rdev, &ib);
716
717 return 0;
718}
719
720/**
721 * radeon_vm_frag_ptes - add fragment information to PTEs
722 *
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
729 *
730 * Global and local mutex must be locked!
731 */
732static 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)
736{
737 /**
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.
743 *
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.
748 *
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.
754 */
755
756 /* NI is optimized for 256KB fragments, SI and newer for 64KB */
757 uint64_t frag_flags = ((rdev->family == CHIP_CAYMAN) ||
758 (rdev->family == CHIP_ARUBA)) ?
759 R600_PTE_FRAG_256KB : R600_PTE_FRAG_64KB;
760 uint64_t frag_align = ((rdev->family == CHIP_CAYMAN) ||
761 (rdev->family == CHIP_ARUBA)) ? 0x200 : 0x80;
762
763 uint64_t frag_start = ALIGN(pe_start, frag_align);
764 uint64_t frag_end = pe_end & ~(frag_align - 1);
765
766 unsigned count;
767
768 /* system pages are non continuously */
769 if ((flags & R600_PTE_SYSTEM) || !(flags & R600_PTE_VALID) ||
770 (frag_start >= frag_end)) {
771
772 count = (pe_end - pe_start) / 8;
773 radeon_vm_set_pages(rdev, ib, pe_start, addr, count,
774 RADEON_GPU_PAGE_SIZE, flags);
775 return;
776 }
777
778 /* handle the 4K area at the beginning */
779 if (pe_start != frag_start) {
780 count = (frag_start - pe_start) / 8;
781 radeon_vm_set_pages(rdev, ib, pe_start, addr, count,
782 RADEON_GPU_PAGE_SIZE, flags);
783 addr += RADEON_GPU_PAGE_SIZE * count;
784 }
785
786 /* handle the area in the middle */
787 count = (frag_end - frag_start) / 8;
788 radeon_vm_set_pages(rdev, ib, frag_start, addr, count,
789 RADEON_GPU_PAGE_SIZE, flags | frag_flags);
790
791 /* handle the 4K area at the end */
792 if (frag_end != pe_end) {
793 addr += RADEON_GPU_PAGE_SIZE * count;
794 count = (pe_end - frag_end) / 8;
795 radeon_vm_set_pages(rdev, ib, frag_end, addr, count,
796 RADEON_GPU_PAGE_SIZE, flags);
797 }
798}
799
800/**
801 * radeon_vm_update_ptes - make sure that page tables are valid
802 *
803 * @rdev: radeon_device pointer
804 * @vm: requested vm
805 * @start: start of GPU address range
806 * @end: end of GPU address range
807 * @dst: destination address to map to
808 * @flags: mapping flags
809 *
810 * Update the page tables in the range @start - @end (cayman+).
811 *
812 * Global and local mutex must be locked!
813 */
814static int radeon_vm_update_ptes(struct radeon_device *rdev,
815 struct radeon_vm *vm,
816 struct radeon_ib *ib,
817 uint64_t start, uint64_t end,
818 uint64_t dst, uint32_t flags)
819{
820 uint64_t mask = RADEON_VM_PTE_COUNT - 1;
821 uint64_t last_pte = ~0, last_dst = ~0;
822 unsigned count = 0;
823 uint64_t addr;
824
825 /* walk over the address space and update the page tables */
826 for (addr = start; addr < end; ) {
827 uint64_t pt_idx = addr >> radeon_vm_block_size;
828 struct radeon_bo *pt = vm->page_tables[pt_idx].bo;
829 unsigned nptes;
830 uint64_t pte;
831 int r;
832
833 radeon_sync_resv(rdev, &ib->sync, pt->tbo.resv, true);
834 r = reservation_object_reserve_shared(pt->tbo.resv, 1);
835 if (r)
836 return r;
837
838 if ((addr & ~mask) == (end & ~mask))
839 nptes = end - addr;
840 else
841 nptes = RADEON_VM_PTE_COUNT - (addr & mask);
842
843 pte = radeon_bo_gpu_offset(pt);
844 pte += (addr & mask) * 8;
845
846 if ((last_pte + 8 * count) != pte) {
847
848 if (count) {
849 radeon_vm_frag_ptes(rdev, ib, last_pte,
850 last_pte + 8 * count,
851 last_dst, flags);
852 }
853
854 count = nptes;
855 last_pte = pte;
856 last_dst = dst;
857 } else {
858 count += nptes;
859 }
860
861 addr += nptes;
862 dst += nptes * RADEON_GPU_PAGE_SIZE;
863 }
864
865 if (count) {
866 radeon_vm_frag_ptes(rdev, ib, last_pte,
867 last_pte + 8 * count,
868 last_dst, flags);
869 }
870
871 return 0;
872}
873
874/**
875 * radeon_vm_fence_pts - fence page tables after an update
876 *
877 * @vm: requested vm
878 * @start: start of GPU address range
879 * @end: end of GPU address range
880 * @fence: fence to use
881 *
882 * Fence the page tables in the range @start - @end (cayman+).
883 *
884 * Global and local mutex must be locked!
885 */
886static void radeon_vm_fence_pts(struct radeon_vm *vm,
887 uint64_t start, uint64_t end,
888 struct radeon_fence *fence)
889{
890 unsigned i;
891
892 start >>= radeon_vm_block_size;
893 end = (end - 1) >> radeon_vm_block_size;
894
895 for (i = start; i <= end; ++i)
896 radeon_bo_fence(vm->page_tables[i].bo, fence, true);
897}
898
899/**
900 * radeon_vm_bo_update - map a bo into the vm page table
901 *
902 * @rdev: radeon_device pointer
903 * @vm: requested vm
904 * @bo: radeon buffer object
905 * @mem: ttm mem
906 *
907 * Fill in the page table entries for @bo (cayman+).
908 * Returns 0 for success, -EINVAL for failure.
909 *
910 * Object have to be reserved and mutex must be locked!
911 */
912int radeon_vm_bo_update(struct radeon_device *rdev,
913 struct radeon_bo_va *bo_va,
914 struct ttm_mem_reg *mem)
915{
916 struct radeon_vm *vm = bo_va->vm;
917 struct radeon_ib ib;
918 unsigned nptes, ncmds, ndw;
919 uint64_t addr;
920 uint32_t flags;
921 int r;
922
923 if (!bo_va->it.start) {
924 dev_err(rdev->dev, "bo %p don't has a mapping in vm %p\n",
925 bo_va->bo, vm);
926 return -EINVAL;
927 }
928
929 spin_lock(&vm->status_lock);
930 if (mem) {
931 if (list_empty(&bo_va->vm_status)) {
932 spin_unlock(&vm->status_lock);
933 return 0;
934 }
935 list_del_init(&bo_va->vm_status);
936 } else {
937 list_del(&bo_va->vm_status);
938 list_add(&bo_va->vm_status, &vm->cleared);
939 }
940 spin_unlock(&vm->status_lock);
941
942 bo_va->flags &= ~RADEON_VM_PAGE_VALID;
943 bo_va->flags &= ~RADEON_VM_PAGE_SYSTEM;
944 bo_va->flags &= ~RADEON_VM_PAGE_SNOOPED;
945 if (bo_va->bo && radeon_ttm_tt_is_readonly(bo_va->bo->tbo.ttm))
946 bo_va->flags &= ~RADEON_VM_PAGE_WRITEABLE;
947
948 if (mem) {
949 addr = (u64)mem->start << PAGE_SHIFT;
950 if (mem->mem_type != TTM_PL_SYSTEM) {
951 bo_va->flags |= RADEON_VM_PAGE_VALID;
952 }
953 if (mem->mem_type == TTM_PL_TT) {
954 bo_va->flags |= RADEON_VM_PAGE_SYSTEM;
955 if (!(bo_va->bo->flags & (RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC)))
956 bo_va->flags |= RADEON_VM_PAGE_SNOOPED;
957
958 } else {
959 addr += rdev->vm_manager.vram_base_offset;
960 }
961 } else {
962 addr = 0;
963 }
964
965 trace_radeon_vm_bo_update(bo_va);
966
967 nptes = bo_va->it.last - bo_va->it.start + 1;
968
969 /* reserve space for one command every (1 << BLOCK_SIZE) entries
970 or 2k dwords (whatever is smaller) */
971 ncmds = (nptes >> min(radeon_vm_block_size, 11)) + 1;
972
973 /* padding, etc. */
974 ndw = 64;
975
976 flags = radeon_vm_page_flags(bo_va->flags);
977 if ((flags & R600_PTE_GART_MASK) == R600_PTE_GART_MASK) {
978 /* only copy commands needed */
979 ndw += ncmds * 7;
980
981 } else if (flags & R600_PTE_SYSTEM) {
982 /* header for write data commands */
983 ndw += ncmds * 4;
984
985 /* body of write data command */
986 ndw += nptes * 2;
987
988 } else {
989 /* set page commands needed */
990 ndw += ncmds * 10;
991
992 /* two extra commands for begin/end of fragment */
993 ndw += 2 * 10;
994 }
995
996 /* update too big for an IB */
997 if (ndw > 0xfffff)
998 return -ENOMEM;
999
1000 r = radeon_ib_get(rdev, R600_RING_TYPE_DMA_INDEX, &ib, NULL, ndw * 4);
1001 if (r)
1002 return r;
1003 ib.length_dw = 0;
1004
1005 if (!(bo_va->flags & RADEON_VM_PAGE_VALID)) {
1006 unsigned i;
1007
1008 for (i = 0; i < RADEON_NUM_RINGS; ++i)
1009 radeon_sync_fence(&ib.sync, vm->ids[i].last_id_use);
1010 }
1011
1012 r = radeon_vm_update_ptes(rdev, vm, &ib, bo_va->it.start,
1013 bo_va->it.last + 1, addr,
1014 radeon_vm_page_flags(bo_va->flags));
1015 if (r) {
1016 radeon_ib_free(rdev, &ib);
1017 return r;
1018 }
1019
1020 radeon_asic_vm_pad_ib(rdev, &ib);
1021 WARN_ON(ib.length_dw > ndw);
1022
1023 r = radeon_ib_schedule(rdev, &ib, NULL, false);
1024 if (r) {
1025 radeon_ib_free(rdev, &ib);
1026 return r;
1027 }
1028 ib.fence->is_vm_update = true;
1029 radeon_vm_fence_pts(vm, bo_va->it.start, bo_va->it.last + 1, ib.fence);
1030 radeon_fence_unref(&bo_va->last_pt_update);
1031 bo_va->last_pt_update = radeon_fence_ref(ib.fence);
1032 radeon_ib_free(rdev, &ib);
1033
1034 return 0;
1035}
1036
1037/**
1038 * radeon_vm_clear_freed - clear freed BOs in the PT
1039 *
1040 * @rdev: radeon_device pointer
1041 * @vm: requested vm
1042 *
1043 * Make sure all freed BOs are cleared in the PT.
1044 * Returns 0 for success.
1045 *
1046 * PTs have to be reserved and mutex must be locked!
1047 */
1048int radeon_vm_clear_freed(struct radeon_device *rdev,
1049 struct radeon_vm *vm)
1050{
1051 struct radeon_bo_va *bo_va;
1052 int r = 0;
1053
1054 spin_lock(&vm->status_lock);
1055 while (!list_empty(&vm->freed)) {
1056 bo_va = list_first_entry(&vm->freed,
1057 struct radeon_bo_va, vm_status);
1058 spin_unlock(&vm->status_lock);
1059
1060 r = radeon_vm_bo_update(rdev, bo_va, NULL);
1061 radeon_bo_unref(&bo_va->bo);
1062 radeon_fence_unref(&bo_va->last_pt_update);
1063 spin_lock(&vm->status_lock);
1064 list_del(&bo_va->vm_status);
1065 kfree(bo_va);
1066 if (r)
1067 break;
1068
1069 }
1070 spin_unlock(&vm->status_lock);
1071 return r;
1072
1073}
1074
1075/**
1076 * radeon_vm_clear_invalids - clear invalidated BOs in the PT
1077 *
1078 * @rdev: radeon_device pointer
1079 * @vm: requested vm
1080 *
1081 * Make sure all invalidated BOs are cleared in the PT.
1082 * Returns 0 for success.
1083 *
1084 * PTs have to be reserved and mutex must be locked!
1085 */
1086int radeon_vm_clear_invalids(struct radeon_device *rdev,
1087 struct radeon_vm *vm)
1088{
1089 struct radeon_bo_va *bo_va;
1090 int r;
1091
1092 spin_lock(&vm->status_lock);
1093 while (!list_empty(&vm->invalidated)) {
1094 bo_va = list_first_entry(&vm->invalidated,
1095 struct radeon_bo_va, vm_status);
1096 spin_unlock(&vm->status_lock);
1097
1098 r = radeon_vm_bo_update(rdev, bo_va, NULL);
1099 if (r)
1100 return r;
1101
1102 spin_lock(&vm->status_lock);
1103 }
1104 spin_unlock(&vm->status_lock);
1105
1106 return 0;
1107}
1108
1109/**
1110 * radeon_vm_bo_rmv - remove a bo to a specific vm
1111 *
1112 * @rdev: radeon_device pointer
1113 * @bo_va: requested bo_va
1114 *
1115 * Remove @bo_va->bo from the requested vm (cayman+).
1116 *
1117 * Object have to be reserved!
1118 */
1119void radeon_vm_bo_rmv(struct radeon_device *rdev,
1120 struct radeon_bo_va *bo_va)
1121{
1122 struct radeon_vm *vm = bo_va->vm;
1123
1124 list_del(&bo_va->bo_list);
1125
1126 mutex_lock(&vm->mutex);
1127 if (bo_va->it.start || bo_va->it.last)
1128 interval_tree_remove(&bo_va->it, &vm->va);
1129
1130 spin_lock(&vm->status_lock);
1131 list_del(&bo_va->vm_status);
1132 if (bo_va->it.start || bo_va->it.last) {
1133 bo_va->bo = radeon_bo_ref(bo_va->bo);
1134 list_add(&bo_va->vm_status, &vm->freed);
1135 } else {
1136 radeon_fence_unref(&bo_va->last_pt_update);
1137 kfree(bo_va);
1138 }
1139 spin_unlock(&vm->status_lock);
1140
1141 mutex_unlock(&vm->mutex);
1142}
1143
1144/**
1145 * radeon_vm_bo_invalidate - mark the bo as invalid
1146 *
1147 * @rdev: radeon_device pointer
1148 * @vm: requested vm
1149 * @bo: radeon buffer object
1150 *
1151 * Mark @bo as invalid (cayman+).
1152 */
1153void radeon_vm_bo_invalidate(struct radeon_device *rdev,
1154 struct radeon_bo *bo)
1155{
1156 struct radeon_bo_va *bo_va;
1157
1158 list_for_each_entry(bo_va, &bo->va, bo_list) {
1159 spin_lock(&bo_va->vm->status_lock);
1160 if (list_empty(&bo_va->vm_status) &&
1161 (bo_va->it.start || bo_va->it.last))
1162 list_add(&bo_va->vm_status, &bo_va->vm->invalidated);
1163 spin_unlock(&bo_va->vm->status_lock);
1164 }
1165}
1166
1167/**
1168 * radeon_vm_init - initialize a vm instance
1169 *
1170 * @rdev: radeon_device pointer
1171 * @vm: requested vm
1172 *
1173 * Init @vm fields (cayman+).
1174 */
1175int radeon_vm_init(struct radeon_device *rdev, struct radeon_vm *vm)
1176{
1177 const unsigned align = min(RADEON_VM_PTB_ALIGN_SIZE,
1178 RADEON_VM_PTE_COUNT * 8);
1179 unsigned pd_size, pd_entries, pts_size;
1180 int i, r;
1181
1182 vm->ib_bo_va = NULL;
1183 for (i = 0; i < RADEON_NUM_RINGS; ++i) {
1184 vm->ids[i].id = 0;
1185 vm->ids[i].flushed_updates = NULL;
1186 vm->ids[i].last_id_use = NULL;
1187 }
1188 mutex_init(&vm->mutex);
1189 vm->va = RB_ROOT_CACHED;
1190 spin_lock_init(&vm->status_lock);
1191 INIT_LIST_HEAD(&vm->invalidated);
1192 INIT_LIST_HEAD(&vm->freed);
1193 INIT_LIST_HEAD(&vm->cleared);
1194
1195 pd_size = radeon_vm_directory_size(rdev);
1196 pd_entries = radeon_vm_num_pdes(rdev);
1197
1198 /* allocate page table array */
1199 pts_size = pd_entries * sizeof(struct radeon_vm_pt);
1200 vm->page_tables = kzalloc(pts_size, GFP_KERNEL);
1201 if (vm->page_tables == NULL) {
1202 DRM_ERROR("Cannot allocate memory for page table array\n");
1203 return -ENOMEM;
1204 }
1205
1206 r = radeon_bo_create(rdev, pd_size, align, true,
1207 RADEON_GEM_DOMAIN_VRAM, 0, NULL,
1208 NULL, &vm->page_directory);
1209 if (r)
1210 return r;
1211
1212 r = radeon_vm_clear_bo(rdev, vm->page_directory);
1213 if (r) {
1214 radeon_bo_unref(&vm->page_directory);
1215 vm->page_directory = NULL;
1216 return r;
1217 }
1218
1219 return 0;
1220}
1221
1222/**
1223 * radeon_vm_fini - tear down a vm instance
1224 *
1225 * @rdev: radeon_device pointer
1226 * @vm: requested vm
1227 *
1228 * Tear down @vm (cayman+).
1229 * Unbind the VM and remove all bos from the vm bo list
1230 */
1231void radeon_vm_fini(struct radeon_device *rdev, struct radeon_vm *vm)
1232{
1233 struct radeon_bo_va *bo_va, *tmp;
1234 int i, r;
1235
1236 if (!RB_EMPTY_ROOT(&vm->va.rb_root)) {
1237 dev_err(rdev->dev, "still active bo inside vm\n");
1238 }
1239 rbtree_postorder_for_each_entry_safe(bo_va, tmp,
1240 &vm->va.rb_root, it.rb) {
1241 interval_tree_remove(&bo_va->it, &vm->va);
1242 r = radeon_bo_reserve(bo_va->bo, false);
1243 if (!r) {
1244 list_del_init(&bo_va->bo_list);
1245 radeon_bo_unreserve(bo_va->bo);
1246 radeon_fence_unref(&bo_va->last_pt_update);
1247 kfree(bo_va);
1248 }
1249 }
1250 list_for_each_entry_safe(bo_va, tmp, &vm->freed, vm_status) {
1251 radeon_bo_unref(&bo_va->bo);
1252 radeon_fence_unref(&bo_va->last_pt_update);
1253 kfree(bo_va);
1254 }
1255
1256 for (i = 0; i < radeon_vm_num_pdes(rdev); i++)
1257 radeon_bo_unref(&vm->page_tables[i].bo);
1258 kfree(vm->page_tables);
1259
1260 radeon_bo_unref(&vm->page_directory);
1261
1262 for (i = 0; i < RADEON_NUM_RINGS; ++i) {
1263 radeon_fence_unref(&vm->ids[i].flushed_updates);
1264 radeon_fence_unref(&vm->ids[i].last_id_use);
1265 }
1266
1267 mutex_destroy(&vm->mutex);
1268}
1269