Commit | Line | Data |
---|---|---|
814ab993 PY |
1 | // SPDX-License-Identifier: GPL-2.0 OR MIT |
2 | /* | |
3 | * Copyright 2020-2021 Advanced Micro Devices, Inc. | |
4 | * | |
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: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | */ | |
814ab993 PY |
23 | #include <linux/types.h> |
24 | #include <linux/hmm.h> | |
25 | #include <linux/dma-direction.h> | |
26 | #include <linux/dma-mapping.h> | |
730ff521 | 27 | #include <linux/migrate.h> |
814ab993 PY |
28 | #include "amdgpu_sync.h" |
29 | #include "amdgpu_object.h" | |
30 | #include "amdgpu_vm.h" | |
31 | #include "amdgpu_mn.h" | |
2fdcb55d | 32 | #include "amdgpu_res_cursor.h" |
814ab993 PY |
33 | #include "kfd_priv.h" |
34 | #include "kfd_svm.h" | |
35 | #include "kfd_migrate.h" | |
acac270d | 36 | #include "kfd_smi_events.h" |
814ab993 | 37 | |
a273bc99 PY |
38 | #ifdef dev_fmt |
39 | #undef dev_fmt | |
40 | #endif | |
7f161df1 | 41 | #define dev_fmt(fmt) "kfd_migrate: " fmt |
a273bc99 | 42 | |
50ea50cf PY |
43 | static uint64_t |
44 | svm_migrate_direct_mapping_addr(struct amdgpu_device *adev, uint64_t addr) | |
45 | { | |
46 | return addr + amdgpu_ttm_domain_start(adev, TTM_PL_VRAM); | |
47 | } | |
48 | ||
49 | static int | |
50 | svm_migrate_gart_map(struct amdgpu_ring *ring, uint64_t npages, | |
51 | dma_addr_t *addr, uint64_t *gart_addr, uint64_t flags) | |
52 | { | |
53 | struct amdgpu_device *adev = ring->adev; | |
54 | struct amdgpu_job *job; | |
55 | unsigned int num_dw, num_bytes; | |
56 | struct dma_fence *fence; | |
57 | uint64_t src_addr, dst_addr; | |
58 | uint64_t pte_flags; | |
59 | void *cpu_addr; | |
60 | int r; | |
61 | ||
62 | /* use gart window 0 */ | |
63 | *gart_addr = adev->gmc.gart_start; | |
64 | ||
65 | num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8); | |
66 | num_bytes = npages * 8; | |
67 | ||
68 | r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes, | |
69 | AMDGPU_IB_POOL_DELAYED, &job); | |
70 | if (r) | |
71 | return r; | |
72 | ||
73 | src_addr = num_dw * 4; | |
74 | src_addr += job->ibs[0].gpu_addr; | |
75 | ||
76 | dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo); | |
77 | amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr, | |
78 | dst_addr, num_bytes, false); | |
79 | ||
80 | amdgpu_ring_pad_ib(ring, &job->ibs[0]); | |
81 | WARN_ON(job->ibs[0].length_dw > num_dw); | |
82 | ||
83 | pte_flags = AMDGPU_PTE_VALID | AMDGPU_PTE_READABLE; | |
84 | pte_flags |= AMDGPU_PTE_SYSTEM | AMDGPU_PTE_SNOOPED; | |
85 | if (!(flags & KFD_IOCTL_SVM_FLAG_GPU_RO)) | |
86 | pte_flags |= AMDGPU_PTE_WRITEABLE; | |
87 | pte_flags |= adev->gart.gart_pte_flags; | |
88 | ||
89 | cpu_addr = &job->ibs[0].ptr[num_dw]; | |
90 | ||
1b08dfb8 | 91 | amdgpu_gart_map(adev, 0, npages, addr, pte_flags, cpu_addr); |
50ea50cf PY |
92 | r = amdgpu_job_submit(job, &adev->mman.entity, |
93 | AMDGPU_FENCE_OWNER_UNDEFINED, &fence); | |
94 | if (r) | |
95 | goto error_free; | |
96 | ||
97 | dma_fence_put(fence); | |
98 | ||
99 | return r; | |
100 | ||
101 | error_free: | |
102 | amdgpu_job_free(job); | |
103 | return r; | |
104 | } | |
105 | ||
106 | /** | |
107 | * svm_migrate_copy_memory_gart - sdma copy data between ram and vram | |
108 | * | |
109 | * @adev: amdgpu device the sdma ring running | |
bbe04dec IB |
110 | * @sys: system DMA pointer to be copied |
111 | * @vram: vram destination DMA pointer | |
50ea50cf PY |
112 | * @npages: number of pages to copy |
113 | * @direction: enum MIGRATION_COPY_DIR | |
114 | * @mfence: output, sdma fence to signal after sdma is done | |
115 | * | |
116 | * ram address uses GART table continuous entries mapping to ram pages, | |
117 | * vram address uses direct mapping of vram pages, which must have npages | |
118 | * number of continuous pages. | |
119 | * GART update and sdma uses same buf copy function ring, sdma is splited to | |
120 | * multiple GTT_MAX_PAGES transfer, all sdma operations are serialized, wait for | |
121 | * the last sdma finish fence which is returned to check copy memory is done. | |
122 | * | |
123 | * Context: Process context, takes and releases gtt_window_lock | |
124 | * | |
125 | * Return: | |
126 | * 0 - OK, otherwise error code | |
127 | */ | |
128 | ||
129 | static int | |
130 | svm_migrate_copy_memory_gart(struct amdgpu_device *adev, dma_addr_t *sys, | |
131 | uint64_t *vram, uint64_t npages, | |
132 | enum MIGRATION_COPY_DIR direction, | |
133 | struct dma_fence **mfence) | |
134 | { | |
135 | const uint64_t GTT_MAX_PAGES = AMDGPU_GTT_MAX_TRANSFER_SIZE; | |
136 | struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring; | |
137 | uint64_t gart_s, gart_d; | |
138 | struct dma_fence *next; | |
139 | uint64_t size; | |
140 | int r; | |
141 | ||
142 | mutex_lock(&adev->mman.gtt_window_lock); | |
143 | ||
144 | while (npages) { | |
145 | size = min(GTT_MAX_PAGES, npages); | |
146 | ||
147 | if (direction == FROM_VRAM_TO_RAM) { | |
148 | gart_s = svm_migrate_direct_mapping_addr(adev, *vram); | |
149 | r = svm_migrate_gart_map(ring, size, sys, &gart_d, 0); | |
150 | ||
151 | } else if (direction == FROM_RAM_TO_VRAM) { | |
152 | r = svm_migrate_gart_map(ring, size, sys, &gart_s, | |
153 | KFD_IOCTL_SVM_FLAG_GPU_RO); | |
154 | gart_d = svm_migrate_direct_mapping_addr(adev, *vram); | |
155 | } | |
156 | if (r) { | |
a273bc99 | 157 | dev_err(adev->dev, "fail %d create gart mapping\n", r); |
50ea50cf PY |
158 | goto out_unlock; |
159 | } | |
160 | ||
161 | r = amdgpu_copy_buffer(ring, gart_s, gart_d, size * PAGE_SIZE, | |
162 | NULL, &next, false, true, false); | |
163 | if (r) { | |
a273bc99 | 164 | dev_err(adev->dev, "fail %d to copy memory\n", r); |
50ea50cf PY |
165 | goto out_unlock; |
166 | } | |
167 | ||
168 | dma_fence_put(*mfence); | |
169 | *mfence = next; | |
170 | npages -= size; | |
171 | if (npages) { | |
172 | sys += size; | |
173 | vram += size; | |
174 | } | |
175 | } | |
176 | ||
177 | out_unlock: | |
178 | mutex_unlock(&adev->mman.gtt_window_lock); | |
179 | ||
180 | return r; | |
181 | } | |
182 | ||
183 | /** | |
184 | * svm_migrate_copy_done - wait for memory copy sdma is done | |
185 | * | |
186 | * @adev: amdgpu device the sdma memory copy is executing on | |
187 | * @mfence: migrate fence | |
188 | * | |
189 | * Wait for dma fence is signaled, if the copy ssplit into multiple sdma | |
190 | * operations, this is the last sdma operation fence. | |
191 | * | |
192 | * Context: called after svm_migrate_copy_memory | |
193 | * | |
194 | * Return: | |
195 | * 0 - success | |
196 | * otherwise - error code from dma fence signal | |
197 | */ | |
48ff079b | 198 | static int |
50ea50cf PY |
199 | svm_migrate_copy_done(struct amdgpu_device *adev, struct dma_fence *mfence) |
200 | { | |
201 | int r = 0; | |
202 | ||
203 | if (mfence) { | |
204 | r = dma_fence_wait(mfence, false); | |
205 | dma_fence_put(mfence); | |
206 | pr_debug("sdma copy memory fence done\n"); | |
207 | } | |
208 | ||
209 | return r; | |
210 | } | |
211 | ||
0b0e518d FK |
212 | unsigned long |
213 | svm_migrate_addr_to_pfn(struct amdgpu_device *adev, unsigned long addr) | |
214 | { | |
215 | return (addr + adev->kfd.dev->pgmap.range.start) >> PAGE_SHIFT; | |
216 | } | |
217 | ||
218 | static void | |
219 | svm_migrate_get_vram_page(struct svm_range *prange, unsigned long pfn) | |
220 | { | |
221 | struct page *page; | |
222 | ||
223 | page = pfn_to_page(pfn); | |
7981ec65 AS |
224 | svm_range_bo_ref(prange->svm_bo); |
225 | page->zone_device_data = prange->svm_bo; | |
0b0e518d FK |
226 | lock_page(page); |
227 | } | |
228 | ||
229 | static void | |
230 | svm_migrate_put_vram_page(struct amdgpu_device *adev, unsigned long addr) | |
231 | { | |
232 | struct page *page; | |
233 | ||
234 | page = pfn_to_page(svm_migrate_addr_to_pfn(adev, addr)); | |
235 | unlock_page(page); | |
236 | put_page(page); | |
237 | } | |
238 | ||
48ff079b FK |
239 | static unsigned long |
240 | svm_migrate_addr(struct amdgpu_device *adev, struct page *page) | |
241 | { | |
242 | unsigned long addr; | |
243 | ||
244 | addr = page_to_pfn(page) << PAGE_SHIFT; | |
245 | return (addr - adev->kfd.dev->pgmap.range.start); | |
246 | } | |
247 | ||
248 | static struct page * | |
249 | svm_migrate_get_sys_page(struct vm_area_struct *vma, unsigned long addr) | |
250 | { | |
251 | struct page *page; | |
252 | ||
253 | page = alloc_page_vma(GFP_HIGHUSER, vma, addr); | |
254 | if (page) | |
255 | lock_page(page); | |
256 | ||
257 | return page; | |
258 | } | |
259 | ||
2e4ec251 | 260 | static void svm_migrate_put_sys_page(unsigned long addr) |
48ff079b FK |
261 | { |
262 | struct page *page; | |
263 | ||
264 | page = pfn_to_page(addr >> PAGE_SHIFT); | |
265 | unlock_page(page); | |
266 | put_page(page); | |
267 | } | |
0b0e518d | 268 | |
33c6bd98 PY |
269 | static unsigned long svm_migrate_successful_pages(struct migrate_vma *migrate) |
270 | { | |
271 | unsigned long cpages = 0; | |
272 | unsigned long i; | |
273 | ||
274 | for (i = 0; i < migrate->npages; i++) { | |
275 | if (migrate->src[i] & MIGRATE_PFN_VALID && | |
276 | migrate->src[i] & MIGRATE_PFN_MIGRATE) | |
277 | cpages++; | |
278 | } | |
279 | return cpages; | |
280 | } | |
281 | ||
740a451b FK |
282 | static unsigned long svm_migrate_unsuccessful_pages(struct migrate_vma *migrate) |
283 | { | |
284 | unsigned long upages = 0; | |
285 | unsigned long i; | |
286 | ||
287 | for (i = 0; i < migrate->npages; i++) { | |
288 | if (migrate->src[i] & MIGRATE_PFN_VALID && | |
289 | !(migrate->src[i] & MIGRATE_PFN_MIGRATE)) | |
290 | upages++; | |
291 | } | |
292 | return upages; | |
293 | } | |
294 | ||
0b0e518d FK |
295 | static int |
296 | svm_migrate_copy_to_vram(struct amdgpu_device *adev, struct svm_range *prange, | |
297 | struct migrate_vma *migrate, struct dma_fence **mfence, | |
298 | dma_addr_t *scratch) | |
299 | { | |
88467db6 | 300 | uint64_t npages = migrate->npages; |
0b0e518d | 301 | struct device *dev = adev->dev; |
2fdcb55d | 302 | struct amdgpu_res_cursor cursor; |
0b0e518d FK |
303 | dma_addr_t *src; |
304 | uint64_t *dst; | |
0b0e518d | 305 | uint64_t i, j; |
a40eb089 | 306 | int r; |
0b0e518d FK |
307 | |
308 | pr_debug("svms 0x%p [0x%lx 0x%lx]\n", prange->svms, prange->start, | |
309 | prange->last); | |
310 | ||
311 | src = scratch; | |
312 | dst = (uint64_t *)(scratch + npages); | |
313 | ||
314 | r = svm_range_vram_node_new(adev, prange, true); | |
315 | if (r) { | |
7f161df1 | 316 | dev_dbg(adev->dev, "fail %d to alloc vram\n", r); |
0b0e518d FK |
317 | goto out; |
318 | } | |
319 | ||
2fdcb55d CK |
320 | amdgpu_res_first(prange->ttm_res, prange->offset << PAGE_SHIFT, |
321 | npages << PAGE_SHIFT, &cursor); | |
0b0e518d FK |
322 | for (i = j = 0; i < npages; i++) { |
323 | struct page *spage; | |
324 | ||
6ffecc94 AS |
325 | spage = migrate_pfn_to_page(migrate->src[i]); |
326 | if (spage && !is_zone_device_page(spage)) { | |
327 | dst[i] = cursor.start + (j << PAGE_SHIFT); | |
328 | migrate->dst[i] = svm_migrate_addr_to_pfn(adev, dst[i]); | |
329 | svm_migrate_get_vram_page(prange, migrate->dst[i]); | |
330 | migrate->dst[i] = migrate_pfn(migrate->dst[i]); | |
0b0e518d FK |
331 | src[i] = dma_map_page(dev, spage, 0, PAGE_SIZE, |
332 | DMA_TO_DEVICE); | |
333 | r = dma_mapping_error(dev, src[i]); | |
334 | if (r) { | |
7f161df1 AS |
335 | dev_err(adev->dev, "%s: fail %d dma_map_page\n", |
336 | __func__, r); | |
0b0e518d FK |
337 | goto out_free_vram_pages; |
338 | } | |
339 | } else { | |
340 | if (j) { | |
341 | r = svm_migrate_copy_memory_gart( | |
342 | adev, src + i - j, | |
343 | dst + i - j, j, | |
344 | FROM_RAM_TO_VRAM, | |
345 | mfence); | |
346 | if (r) | |
347 | goto out_free_vram_pages; | |
88467db6 | 348 | amdgpu_res_next(&cursor, (j + 1) << PAGE_SHIFT); |
0b0e518d FK |
349 | j = 0; |
350 | } else { | |
2fdcb55d | 351 | amdgpu_res_next(&cursor, PAGE_SIZE); |
0b0e518d FK |
352 | } |
353 | continue; | |
354 | } | |
355 | ||
a273bc99 PY |
356 | pr_debug_ratelimited("dma mapping src to 0x%llx, pfn 0x%lx\n", |
357 | src[i] >> PAGE_SHIFT, page_to_pfn(spage)); | |
0b0e518d | 358 | |
2fdcb55d | 359 | if (j >= (cursor.size >> PAGE_SHIFT) - 1 && i < npages - 1) { |
0b0e518d FK |
360 | r = svm_migrate_copy_memory_gart(adev, src + i - j, |
361 | dst + i - j, j + 1, | |
362 | FROM_RAM_TO_VRAM, | |
363 | mfence); | |
364 | if (r) | |
365 | goto out_free_vram_pages; | |
2fdcb55d | 366 | amdgpu_res_next(&cursor, (j + 1) * PAGE_SIZE); |
2243f493 | 367 | j = 0; |
0b0e518d FK |
368 | } else { |
369 | j++; | |
370 | } | |
371 | } | |
372 | ||
373 | r = svm_migrate_copy_memory_gart(adev, src + i - j, dst + i - j, j, | |
374 | FROM_RAM_TO_VRAM, mfence); | |
375 | ||
376 | out_free_vram_pages: | |
377 | if (r) { | |
378 | pr_debug("failed %d to copy memory to vram\n", r); | |
379 | while (i--) { | |
380 | svm_migrate_put_vram_page(adev, dst[i]); | |
381 | migrate->dst[i] = 0; | |
382 | } | |
383 | } | |
384 | ||
3bf8282c AS |
385 | #ifdef DEBUG_FORCE_MIXED_DOMAINS |
386 | for (i = 0, j = 0; i < npages; i += 4, j++) { | |
387 | if (j & 1) | |
388 | continue; | |
389 | svm_migrate_put_vram_page(adev, dst[i]); | |
390 | migrate->dst[i] = 0; | |
391 | svm_migrate_put_vram_page(adev, dst[i + 1]); | |
392 | migrate->dst[i + 1] = 0; | |
393 | svm_migrate_put_vram_page(adev, dst[i + 2]); | |
394 | migrate->dst[i + 2] = 0; | |
395 | svm_migrate_put_vram_page(adev, dst[i + 3]); | |
396 | migrate->dst[i + 3] = 0; | |
397 | } | |
398 | #endif | |
0b0e518d FK |
399 | out: |
400 | return r; | |
401 | } | |
402 | ||
ca432dcc | 403 | static long |
0b0e518d FK |
404 | svm_migrate_vma_to_vram(struct amdgpu_device *adev, struct svm_range *prange, |
405 | struct vm_area_struct *vma, uint64_t start, | |
acac270d | 406 | uint64_t end, uint32_t trigger) |
0b0e518d | 407 | { |
acac270d | 408 | struct kfd_process *p = container_of(prange->svms, struct kfd_process, svms); |
0b0e518d | 409 | uint64_t npages = (end - start) >> PAGE_SHIFT; |
d4ebc200 | 410 | struct kfd_process_device *pdd; |
0b0e518d | 411 | struct dma_fence *mfence = NULL; |
16ce101d | 412 | struct migrate_vma migrate = { 0 }; |
75fa98d6 | 413 | unsigned long cpages = 0; |
0b0e518d | 414 | dma_addr_t *scratch; |
0b0e518d FK |
415 | void *buf; |
416 | int r = -ENOMEM; | |
0b0e518d FK |
417 | |
418 | memset(&migrate, 0, sizeof(migrate)); | |
419 | migrate.vma = vma; | |
420 | migrate.start = start; | |
421 | migrate.end = end; | |
422 | migrate.flags = MIGRATE_VMA_SELECT_SYSTEM; | |
3a61dae8 | 423 | migrate.pgmap_owner = SVM_ADEV_PGMAP_OWNER(adev); |
0b0e518d | 424 | |
cc9d82fc YW |
425 | buf = kvcalloc(npages, |
426 | 2 * sizeof(*migrate.src) + sizeof(uint64_t) + sizeof(dma_addr_t), | |
427 | GFP_KERNEL); | |
0b0e518d FK |
428 | if (!buf) |
429 | goto out; | |
430 | ||
431 | migrate.src = buf; | |
432 | migrate.dst = migrate.src + npages; | |
433 | scratch = (dma_addr_t *)(migrate.dst + npages); | |
434 | ||
acac270d PY |
435 | kfd_smi_event_migration_start(adev->kfd.dev, p->lead_thread->pid, |
436 | start >> PAGE_SHIFT, end >> PAGE_SHIFT, | |
437 | 0, adev->kfd.dev->id, prange->prefetch_loc, | |
438 | prange->preferred_loc, trigger); | |
439 | ||
0b0e518d FK |
440 | r = migrate_vma_setup(&migrate); |
441 | if (r) { | |
7f161df1 AS |
442 | dev_err(adev->dev, "%s: vma setup fail %d range [0x%lx 0x%lx]\n", |
443 | __func__, r, prange->start, prange->last); | |
0b0e518d FK |
444 | goto out_free; |
445 | } | |
0b0e518d | 446 | |
75fa98d6 PY |
447 | cpages = migrate.cpages; |
448 | if (!cpages) { | |
ca432dcc PY |
449 | pr_debug("failed collect migrate sys pages [0x%lx 0x%lx]\n", |
450 | prange->start, prange->last); | |
451 | goto out_free; | |
0b0e518d | 452 | } |
75fa98d6 PY |
453 | if (cpages != npages) |
454 | pr_debug("partial migration, 0x%lx/0x%llx pages migrated\n", | |
455 | cpages, npages); | |
456 | else | |
457 | pr_debug("0x%lx pages migrated\n", cpages); | |
0b0e518d | 458 | |
ca432dcc PY |
459 | r = svm_migrate_copy_to_vram(adev, prange, &migrate, &mfence, scratch); |
460 | migrate_vma_pages(&migrate); | |
33c6bd98 PY |
461 | |
462 | pr_debug("successful/cpages/npages 0x%lx/0x%lx/0x%lx\n", | |
463 | svm_migrate_successful_pages(&migrate), cpages, migrate.npages); | |
464 | ||
ca432dcc PY |
465 | svm_migrate_copy_done(adev, mfence); |
466 | migrate_vma_finalize(&migrate); | |
467 | ||
acac270d PY |
468 | kfd_smi_event_migration_end(adev->kfd.dev, p->lead_thread->pid, |
469 | start >> PAGE_SHIFT, end >> PAGE_SHIFT, | |
470 | 0, adev->kfd.dev->id, trigger); | |
471 | ||
0b0e518d FK |
472 | svm_range_dma_unmap(adev->dev, scratch, 0, npages); |
473 | svm_range_free_dma_mappings(prange); | |
474 | ||
475 | out_free: | |
476 | kvfree(buf); | |
477 | out: | |
75fa98d6 | 478 | if (!r && cpages) { |
d4ebc200 PY |
479 | pdd = svm_range_get_pdd_by_adev(prange, adev); |
480 | if (pdd) | |
75fa98d6 | 481 | WRITE_ONCE(pdd->page_in, pdd->page_in + cpages); |
d4ebc200 | 482 | |
75fa98d6 | 483 | return cpages; |
ca432dcc | 484 | } |
0b0e518d FK |
485 | return r; |
486 | } | |
487 | ||
488 | /** | |
489 | * svm_migrate_ram_to_vram - migrate svm range from system to device | |
490 | * @prange: range structure | |
491 | * @best_loc: the device to migrate to | |
cda0f85b | 492 | * @mm: the process mm structure |
acac270d | 493 | * @trigger: reason of migration |
0b0e518d FK |
494 | * |
495 | * Context: Process context, caller hold mmap read lock, svms lock, prange lock | |
496 | * | |
497 | * Return: | |
498 | * 0 - OK, otherwise error code | |
499 | */ | |
1a3b2b5d FK |
500 | static int |
501 | svm_migrate_ram_to_vram(struct svm_range *prange, uint32_t best_loc, | |
acac270d | 502 | struct mm_struct *mm, uint32_t trigger) |
0b0e518d FK |
503 | { |
504 | unsigned long addr, start, end; | |
505 | struct vm_area_struct *vma; | |
506 | struct amdgpu_device *adev; | |
ca432dcc PY |
507 | unsigned long cpages = 0; |
508 | long r = 0; | |
0b0e518d FK |
509 | |
510 | if (prange->actual_loc == best_loc) { | |
511 | pr_debug("svms 0x%p [0x%lx 0x%lx] already on best_loc 0x%x\n", | |
512 | prange->svms, prange->start, prange->last, best_loc); | |
513 | return 0; | |
514 | } | |
515 | ||
516 | adev = svm_range_get_adev_by_id(prange, best_loc); | |
517 | if (!adev) { | |
518 | pr_debug("failed to get device by id 0x%x\n", best_loc); | |
519 | return -ENODEV; | |
520 | } | |
521 | ||
522 | pr_debug("svms 0x%p [0x%lx 0x%lx] to gpu 0x%x\n", prange->svms, | |
523 | prange->start, prange->last, best_loc); | |
524 | ||
525 | /* FIXME: workaround for page locking bug with invalid pages */ | |
a010d98a | 526 | svm_range_prefault(prange, mm, SVM_ADEV_PGMAP_OWNER(adev)); |
0b0e518d FK |
527 | |
528 | start = prange->start << PAGE_SHIFT; | |
529 | end = (prange->last + 1) << PAGE_SHIFT; | |
530 | ||
0b0e518d FK |
531 | for (addr = start; addr < end;) { |
532 | unsigned long next; | |
533 | ||
534 | vma = find_vma(mm, addr); | |
535 | if (!vma || addr < vma->vm_start) | |
536 | break; | |
537 | ||
538 | next = min(vma->vm_end, end); | |
acac270d | 539 | r = svm_migrate_vma_to_vram(adev, prange, vma, addr, next, trigger); |
ca432dcc PY |
540 | if (r < 0) { |
541 | pr_debug("failed %ld to migrate\n", r); | |
0b0e518d | 542 | break; |
ca432dcc PY |
543 | } else { |
544 | cpages += r; | |
0b0e518d FK |
545 | } |
546 | addr = next; | |
547 | } | |
548 | ||
ca432dcc | 549 | if (cpages) |
0b0e518d FK |
550 | prange->actual_loc = best_loc; |
551 | ||
ca432dcc | 552 | return r < 0 ? r : 0; |
0b0e518d FK |
553 | } |
554 | ||
814ab993 PY |
555 | static void svm_migrate_page_free(struct page *page) |
556 | { | |
7981ec65 AS |
557 | struct svm_range_bo *svm_bo = page->zone_device_data; |
558 | ||
559 | if (svm_bo) { | |
a273bc99 | 560 | pr_debug_ratelimited("ref: %d\n", kref_read(&svm_bo->kref)); |
69879b30 | 561 | svm_range_bo_unref_async(svm_bo); |
7981ec65 | 562 | } |
48ff079b FK |
563 | } |
564 | ||
565 | static int | |
566 | svm_migrate_copy_to_ram(struct amdgpu_device *adev, struct svm_range *prange, | |
567 | struct migrate_vma *migrate, struct dma_fence **mfence, | |
1ade5f84 | 568 | dma_addr_t *scratch, uint64_t npages) |
48ff079b | 569 | { |
48ff079b FK |
570 | struct device *dev = adev->dev; |
571 | uint64_t *src; | |
572 | dma_addr_t *dst; | |
573 | struct page *dpage; | |
574 | uint64_t i = 0, j; | |
575 | uint64_t addr; | |
576 | int r = 0; | |
577 | ||
578 | pr_debug("svms 0x%p [0x%lx 0x%lx]\n", prange->svms, prange->start, | |
579 | prange->last); | |
580 | ||
581 | addr = prange->start << PAGE_SHIFT; | |
582 | ||
583 | src = (uint64_t *)(scratch + npages); | |
584 | dst = scratch; | |
585 | ||
1ade5f84 | 586 | for (i = 0, j = 0; i < npages; i++, addr += PAGE_SIZE) { |
48ff079b FK |
587 | struct page *spage; |
588 | ||
589 | spage = migrate_pfn_to_page(migrate->src[i]); | |
1ade5f84 AS |
590 | if (!spage || !is_zone_device_page(spage)) { |
591 | pr_debug("invalid page. Could be in CPU already svms 0x%p [0x%lx 0x%lx]\n", | |
48ff079b | 592 | prange->svms, prange->start, prange->last); |
1ade5f84 AS |
593 | if (j) { |
594 | r = svm_migrate_copy_memory_gart(adev, dst + i - j, | |
595 | src + i - j, j, | |
596 | FROM_VRAM_TO_RAM, | |
597 | mfence); | |
598 | if (r) | |
599 | goto out_oom; | |
600 | j = 0; | |
601 | } | |
602 | continue; | |
48ff079b FK |
603 | } |
604 | src[i] = svm_migrate_addr(adev, spage); | |
88467db6 | 605 | if (j > 0 && src[i] != src[i - 1] + PAGE_SIZE) { |
48ff079b FK |
606 | r = svm_migrate_copy_memory_gart(adev, dst + i - j, |
607 | src + i - j, j, | |
608 | FROM_VRAM_TO_RAM, | |
609 | mfence); | |
610 | if (r) | |
611 | goto out_oom; | |
612 | j = 0; | |
613 | } | |
614 | ||
615 | dpage = svm_migrate_get_sys_page(migrate->vma, addr); | |
616 | if (!dpage) { | |
617 | pr_debug("failed get page svms 0x%p [0x%lx 0x%lx]\n", | |
618 | prange->svms, prange->start, prange->last); | |
619 | r = -ENOMEM; | |
620 | goto out_oom; | |
621 | } | |
622 | ||
623 | dst[i] = dma_map_page(dev, dpage, 0, PAGE_SIZE, DMA_FROM_DEVICE); | |
624 | r = dma_mapping_error(dev, dst[i]); | |
625 | if (r) { | |
7f161df1 | 626 | dev_err(adev->dev, "%s: fail %d dma_map_page\n", __func__, r); |
48ff079b FK |
627 | goto out_oom; |
628 | } | |
629 | ||
a273bc99 PY |
630 | pr_debug_ratelimited("dma mapping dst to 0x%llx, pfn 0x%lx\n", |
631 | dst[i] >> PAGE_SHIFT, page_to_pfn(dpage)); | |
48ff079b FK |
632 | |
633 | migrate->dst[i] = migrate_pfn(page_to_pfn(dpage)); | |
1ade5f84 | 634 | j++; |
48ff079b FK |
635 | } |
636 | ||
637 | r = svm_migrate_copy_memory_gart(adev, dst + i - j, src + i - j, j, | |
638 | FROM_VRAM_TO_RAM, mfence); | |
639 | ||
640 | out_oom: | |
641 | if (r) { | |
642 | pr_debug("failed %d copy to ram\n", r); | |
643 | while (i--) { | |
644 | svm_migrate_put_sys_page(dst[i]); | |
645 | migrate->dst[i] = 0; | |
646 | } | |
647 | } | |
648 | ||
649 | return r; | |
650 | } | |
651 | ||
9527b9ca PY |
652 | /** |
653 | * svm_migrate_vma_to_ram - migrate range inside one vma from device to system | |
654 | * | |
655 | * @adev: amdgpu device to migrate from | |
656 | * @prange: svm range structure | |
657 | * @vma: vm_area_struct that range [start, end] belongs to | |
658 | * @start: range start virtual address in pages | |
659 | * @end: range end virtual address in pages | |
660 | * | |
661 | * Context: Process context, caller hold mmap read lock, prange->migrate_mutex | |
662 | * | |
663 | * Return: | |
664 | * 0 - success with all pages migrated | |
665 | * negative values - indicate error | |
666 | * positive values - partial migration, number of pages not migrated | |
667 | */ | |
ca432dcc | 668 | static long |
48ff079b | 669 | svm_migrate_vma_to_ram(struct amdgpu_device *adev, struct svm_range *prange, |
acac270d | 670 | struct vm_area_struct *vma, uint64_t start, uint64_t end, |
16ce101d | 671 | uint32_t trigger, struct page *fault_page) |
48ff079b | 672 | { |
acac270d | 673 | struct kfd_process *p = container_of(prange->svms, struct kfd_process, svms); |
48ff079b | 674 | uint64_t npages = (end - start) >> PAGE_SHIFT; |
740a451b FK |
675 | unsigned long upages = npages; |
676 | unsigned long cpages = 0; | |
d4ebc200 | 677 | struct kfd_process_device *pdd; |
48ff079b | 678 | struct dma_fence *mfence = NULL; |
16ce101d | 679 | struct migrate_vma migrate = { 0 }; |
48ff079b | 680 | dma_addr_t *scratch; |
48ff079b FK |
681 | void *buf; |
682 | int r = -ENOMEM; | |
683 | ||
684 | memset(&migrate, 0, sizeof(migrate)); | |
685 | migrate.vma = vma; | |
686 | migrate.start = start; | |
687 | migrate.end = end; | |
3a61dae8 | 688 | migrate.pgmap_owner = SVM_ADEV_PGMAP_OWNER(adev); |
c83dee9b AS |
689 | if (adev->gmc.xgmi.connected_to_cpu) |
690 | migrate.flags = MIGRATE_VMA_SELECT_DEVICE_COHERENT; | |
691 | else | |
692 | migrate.flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE; | |
48ff079b | 693 | |
cc9d82fc YW |
694 | buf = kvcalloc(npages, |
695 | 2 * sizeof(*migrate.src) + sizeof(uint64_t) + sizeof(dma_addr_t), | |
696 | GFP_KERNEL); | |
48ff079b FK |
697 | if (!buf) |
698 | goto out; | |
699 | ||
700 | migrate.src = buf; | |
701 | migrate.dst = migrate.src + npages; | |
16ce101d | 702 | migrate.fault_page = fault_page; |
48ff079b FK |
703 | scratch = (dma_addr_t *)(migrate.dst + npages); |
704 | ||
acac270d PY |
705 | kfd_smi_event_migration_start(adev->kfd.dev, p->lead_thread->pid, |
706 | start >> PAGE_SHIFT, end >> PAGE_SHIFT, | |
707 | adev->kfd.dev->id, 0, prange->prefetch_loc, | |
708 | prange->preferred_loc, trigger); | |
709 | ||
48ff079b FK |
710 | r = migrate_vma_setup(&migrate); |
711 | if (r) { | |
7f161df1 AS |
712 | dev_err(adev->dev, "%s: vma setup fail %d range [0x%lx 0x%lx]\n", |
713 | __func__, r, prange->start, prange->last); | |
48ff079b FK |
714 | goto out_free; |
715 | } | |
716 | ||
75fa98d6 PY |
717 | cpages = migrate.cpages; |
718 | if (!cpages) { | |
48ff079b FK |
719 | pr_debug("failed collect migrate device pages [0x%lx 0x%lx]\n", |
720 | prange->start, prange->last); | |
740a451b | 721 | upages = svm_migrate_unsuccessful_pages(&migrate); |
ca432dcc | 722 | goto out_free; |
48ff079b | 723 | } |
75fa98d6 PY |
724 | if (cpages != npages) |
725 | pr_debug("partial migration, 0x%lx/0x%llx pages migrated\n", | |
726 | cpages, npages); | |
727 | else | |
728 | pr_debug("0x%lx pages migrated\n", cpages); | |
48ff079b | 729 | |
ca432dcc PY |
730 | r = svm_migrate_copy_to_ram(adev, prange, &migrate, &mfence, |
731 | scratch, npages); | |
732 | migrate_vma_pages(&migrate); | |
33c6bd98 | 733 | |
740a451b FK |
734 | upages = svm_migrate_unsuccessful_pages(&migrate); |
735 | pr_debug("unsuccessful/cpages/npages 0x%lx/0x%lx/0x%lx\n", | |
736 | upages, cpages, migrate.npages); | |
33c6bd98 | 737 | |
ca432dcc PY |
738 | svm_migrate_copy_done(adev, mfence); |
739 | migrate_vma_finalize(&migrate); | |
acac270d PY |
740 | |
741 | kfd_smi_event_migration_end(adev->kfd.dev, p->lead_thread->pid, | |
742 | start >> PAGE_SHIFT, end >> PAGE_SHIFT, | |
743 | adev->kfd.dev->id, 0, trigger); | |
744 | ||
48ff079b FK |
745 | svm_range_dma_unmap(adev->dev, scratch, 0, npages); |
746 | ||
747 | out_free: | |
748 | kvfree(buf); | |
749 | out: | |
75fa98d6 | 750 | if (!r && cpages) { |
d4ebc200 PY |
751 | pdd = svm_range_get_pdd_by_adev(prange, adev); |
752 | if (pdd) | |
75fa98d6 | 753 | WRITE_ONCE(pdd->page_out, pdd->page_out + cpages); |
d4ebc200 | 754 | } |
740a451b | 755 | return r ? r : upages; |
48ff079b FK |
756 | } |
757 | ||
758 | /** | |
759 | * svm_migrate_vram_to_ram - migrate svm range from device to system | |
760 | * @prange: range structure | |
761 | * @mm: process mm, use current->mm if NULL | |
acac270d | 762 | * @trigger: reason of migration |
48ff079b | 763 | * |
9527b9ca | 764 | * Context: Process context, caller hold mmap read lock, prange->migrate_mutex |
48ff079b FK |
765 | * |
766 | * Return: | |
767 | * 0 - OK, otherwise error code | |
768 | */ | |
acac270d | 769 | int svm_migrate_vram_to_ram(struct svm_range *prange, struct mm_struct *mm, |
16ce101d | 770 | uint32_t trigger, struct page *fault_page) |
48ff079b FK |
771 | { |
772 | struct amdgpu_device *adev; | |
773 | struct vm_area_struct *vma; | |
774 | unsigned long addr; | |
775 | unsigned long start; | |
776 | unsigned long end; | |
740a451b | 777 | unsigned long upages = 0; |
ca432dcc | 778 | long r = 0; |
48ff079b FK |
779 | |
780 | if (!prange->actual_loc) { | |
781 | pr_debug("[0x%lx 0x%lx] already migrated to ram\n", | |
782 | prange->start, prange->last); | |
783 | return 0; | |
784 | } | |
785 | ||
786 | adev = svm_range_get_adev_by_id(prange, prange->actual_loc); | |
787 | if (!adev) { | |
788 | pr_debug("failed to get device by id 0x%x\n", | |
789 | prange->actual_loc); | |
790 | return -ENODEV; | |
791 | } | |
792 | ||
793 | pr_debug("svms 0x%p prange 0x%p [0x%lx 0x%lx] from gpu 0x%x to ram\n", | |
794 | prange->svms, prange, prange->start, prange->last, | |
795 | prange->actual_loc); | |
796 | ||
797 | start = prange->start << PAGE_SHIFT; | |
798 | end = (prange->last + 1) << PAGE_SHIFT; | |
799 | ||
800 | for (addr = start; addr < end;) { | |
801 | unsigned long next; | |
802 | ||
803 | vma = find_vma(mm, addr); | |
9527b9ca PY |
804 | if (!vma || addr < vma->vm_start) { |
805 | pr_debug("failed to find vma for prange %p\n", prange); | |
806 | r = -EFAULT; | |
48ff079b | 807 | break; |
9527b9ca | 808 | } |
48ff079b FK |
809 | |
810 | next = min(vma->vm_end, end); | |
16ce101d AP |
811 | r = svm_migrate_vma_to_ram(adev, prange, vma, addr, next, trigger, |
812 | fault_page); | |
ca432dcc | 813 | if (r < 0) { |
9527b9ca | 814 | pr_debug("failed %ld to migrate prange %p\n", r, prange); |
48ff079b | 815 | break; |
ca432dcc | 816 | } else { |
740a451b | 817 | upages += r; |
48ff079b FK |
818 | } |
819 | addr = next; | |
820 | } | |
821 | ||
9527b9ca | 822 | if (r >= 0 && !upages) { |
48ff079b FK |
823 | svm_range_vram_node_free(prange); |
824 | prange->actual_loc = 0; | |
825 | } | |
ca432dcc PY |
826 | |
827 | return r < 0 ? r : 0; | |
814ab993 PY |
828 | } |
829 | ||
1a3b2b5d FK |
830 | /** |
831 | * svm_migrate_vram_to_vram - migrate svm range from device to device | |
832 | * @prange: range structure | |
833 | * @best_loc: the device to migrate to | |
834 | * @mm: process mm, use current->mm if NULL | |
acac270d | 835 | * @trigger: reason of migration |
1a3b2b5d FK |
836 | * |
837 | * Context: Process context, caller hold mmap read lock, svms lock, prange lock | |
838 | * | |
839 | * Return: | |
840 | * 0 - OK, otherwise error code | |
841 | */ | |
842 | static int | |
843 | svm_migrate_vram_to_vram(struct svm_range *prange, uint32_t best_loc, | |
acac270d | 844 | struct mm_struct *mm, uint32_t trigger) |
1a3b2b5d | 845 | { |
740a451b | 846 | int r, retries = 3; |
1a3b2b5d FK |
847 | |
848 | /* | |
849 | * TODO: for both devices with PCIe large bar or on same xgmi hive, skip | |
850 | * system memory as migration bridge | |
851 | */ | |
852 | ||
853 | pr_debug("from gpu 0x%x to gpu 0x%x\n", prange->actual_loc, best_loc); | |
854 | ||
740a451b | 855 | do { |
16ce101d | 856 | r = svm_migrate_vram_to_ram(prange, mm, trigger, NULL); |
740a451b FK |
857 | if (r) |
858 | return r; | |
859 | } while (prange->actual_loc && --retries); | |
860 | ||
861 | if (prange->actual_loc) | |
862 | return -EDEADLK; | |
1a3b2b5d | 863 | |
acac270d | 864 | return svm_migrate_ram_to_vram(prange, best_loc, mm, trigger); |
1a3b2b5d FK |
865 | } |
866 | ||
867 | int | |
868 | svm_migrate_to_vram(struct svm_range *prange, uint32_t best_loc, | |
acac270d | 869 | struct mm_struct *mm, uint32_t trigger) |
1a3b2b5d FK |
870 | { |
871 | if (!prange->actual_loc) | |
acac270d | 872 | return svm_migrate_ram_to_vram(prange, best_loc, mm, trigger); |
1a3b2b5d | 873 | else |
acac270d | 874 | return svm_migrate_vram_to_vram(prange, best_loc, mm, trigger); |
1a3b2b5d FK |
875 | |
876 | } | |
877 | ||
814ab993 PY |
878 | /** |
879 | * svm_migrate_to_ram - CPU page fault handler | |
880 | * @vmf: CPU vm fault vma, address | |
881 | * | |
48ff079b | 882 | * Context: vm fault handler, caller holds the mmap read lock |
814ab993 PY |
883 | * |
884 | * Return: | |
885 | * 0 - OK | |
886 | * VM_FAULT_SIGBUS - notice application to have SIGBUS page fault | |
887 | */ | |
888 | static vm_fault_t svm_migrate_to_ram(struct vm_fault *vmf) | |
889 | { | |
48ff079b FK |
890 | unsigned long addr = vmf->address; |
891 | struct vm_area_struct *vma; | |
892 | enum svm_work_list_ops op; | |
893 | struct svm_range *parent; | |
894 | struct svm_range *prange; | |
895 | struct kfd_process *p; | |
896 | struct mm_struct *mm; | |
897 | int r = 0; | |
898 | ||
899 | vma = vmf->vma; | |
900 | mm = vma->vm_mm; | |
901 | ||
902 | p = kfd_lookup_process_by_mm(vma->vm_mm); | |
903 | if (!p) { | |
904 | pr_debug("failed find process at fault address 0x%lx\n", addr); | |
905 | return VM_FAULT_SIGBUS; | |
906 | } | |
a6283010 AS |
907 | if (READ_ONCE(p->svms.faulting_task) == current) { |
908 | pr_debug("skipping ram migration\n"); | |
909 | kfd_unref_process(p); | |
910 | return 0; | |
911 | } | |
48ff079b FK |
912 | addr >>= PAGE_SHIFT; |
913 | pr_debug("CPU page fault svms 0x%p address 0x%lx\n", &p->svms, addr); | |
914 | ||
915 | mutex_lock(&p->svms.lock); | |
916 | ||
917 | prange = svm_range_from_addr(&p->svms, addr, &parent); | |
918 | if (!prange) { | |
919 | pr_debug("cannot find svm range at 0x%lx\n", addr); | |
920 | r = -EFAULT; | |
921 | goto out; | |
922 | } | |
923 | ||
924 | mutex_lock(&parent->migrate_mutex); | |
925 | if (prange != parent) | |
926 | mutex_lock_nested(&prange->migrate_mutex, 1); | |
927 | ||
928 | if (!prange->actual_loc) | |
929 | goto out_unlock_prange; | |
930 | ||
931 | svm_range_lock(parent); | |
932 | if (prange != parent) | |
933 | mutex_lock_nested(&prange->lock, 1); | |
934 | r = svm_range_split_by_granularity(p, mm, addr, parent, prange); | |
935 | if (prange != parent) | |
936 | mutex_unlock(&prange->lock); | |
937 | svm_range_unlock(parent); | |
938 | if (r) { | |
939 | pr_debug("failed %d to split range by granularity\n", r); | |
940 | goto out_unlock_prange; | |
941 | } | |
942 | ||
16ce101d AP |
943 | r = svm_migrate_vram_to_ram(prange, mm, KFD_MIGRATE_TRIGGER_PAGEFAULT_CPU, |
944 | vmf->page); | |
48ff079b FK |
945 | if (r) |
946 | pr_debug("failed %d migrate 0x%p [0x%lx 0x%lx] to ram\n", r, | |
947 | prange, prange->start, prange->last); | |
948 | ||
90d7d3ed FK |
949 | /* xnack on, update mapping on GPUs with ACCESS_IN_PLACE */ |
950 | if (p->xnack_enabled && parent == prange) | |
951 | op = SVM_OP_UPDATE_RANGE_NOTIFIER_AND_MAP; | |
952 | else | |
953 | op = SVM_OP_UPDATE_RANGE_NOTIFIER; | |
48ff079b FK |
954 | svm_range_add_list_work(&p->svms, parent, mm, op); |
955 | schedule_deferred_list_work(&p->svms); | |
956 | ||
957 | out_unlock_prange: | |
958 | if (prange != parent) | |
959 | mutex_unlock(&prange->migrate_mutex); | |
960 | mutex_unlock(&parent->migrate_mutex); | |
961 | out: | |
962 | mutex_unlock(&p->svms.lock); | |
963 | kfd_unref_process(p); | |
964 | ||
965 | pr_debug("CPU fault svms 0x%p address 0x%lx done\n", &p->svms, addr); | |
966 | ||
967 | return r ? VM_FAULT_SIGBUS : 0; | |
814ab993 PY |
968 | } |
969 | ||
970 | static const struct dev_pagemap_ops svm_migrate_pgmap_ops = { | |
971 | .page_free = svm_migrate_page_free, | |
972 | .migrate_to_ram = svm_migrate_to_ram, | |
973 | }; | |
974 | ||
c46ebb6a PY |
975 | /* Each VRAM page uses sizeof(struct page) on system memory */ |
976 | #define SVM_HMM_PAGE_STRUCT_SIZE(size) ((size)/PAGE_SIZE * sizeof(struct page)) | |
977 | ||
814ab993 PY |
978 | int svm_migrate_init(struct amdgpu_device *adev) |
979 | { | |
980 | struct kfd_dev *kfddev = adev->kfd.dev; | |
981 | struct dev_pagemap *pgmap; | |
c83dee9b | 982 | struct resource *res = NULL; |
814ab993 PY |
983 | unsigned long size; |
984 | void *r; | |
985 | ||
986 | /* Page migration works on Vega10 or newer */ | |
046e674b | 987 | if (!KFD_IS_SOC15(kfddev)) |
814ab993 PY |
988 | return -EINVAL; |
989 | ||
990 | pgmap = &kfddev->pgmap; | |
991 | memset(pgmap, 0, sizeof(*pgmap)); | |
992 | ||
993 | /* TODO: register all vram to HMM for now. | |
994 | * should remove reserved size | |
995 | */ | |
996 | size = ALIGN(adev->gmc.real_vram_size, 2ULL << 20); | |
c83dee9b AS |
997 | if (adev->gmc.xgmi.connected_to_cpu) { |
998 | pgmap->range.start = adev->gmc.aper_base; | |
999 | pgmap->range.end = adev->gmc.aper_base + adev->gmc.aper_size - 1; | |
1000 | pgmap->type = MEMORY_DEVICE_COHERENT; | |
1001 | } else { | |
1002 | res = devm_request_free_mem_region(adev->dev, &iomem_resource, size); | |
1003 | if (IS_ERR(res)) | |
1004 | return -ENOMEM; | |
1005 | pgmap->range.start = res->start; | |
1006 | pgmap->range.end = res->end; | |
1007 | pgmap->type = MEMORY_DEVICE_PRIVATE; | |
1008 | } | |
814ab993 | 1009 | |
814ab993 | 1010 | pgmap->nr_range = 1; |
814ab993 | 1011 | pgmap->ops = &svm_migrate_pgmap_ops; |
3a61dae8 | 1012 | pgmap->owner = SVM_ADEV_PGMAP_OWNER(adev); |
c83dee9b | 1013 | pgmap->flags = 0; |
22f4f4fa PY |
1014 | /* Device manager releases device-specific resources, memory region and |
1015 | * pgmap when driver disconnects from device. | |
1016 | */ | |
814ab993 PY |
1017 | r = devm_memremap_pages(adev->dev, pgmap); |
1018 | if (IS_ERR(r)) { | |
1019 | pr_err("failed to register HMM device memory\n"); | |
586d71a4 PY |
1020 | /* Disable SVM support capability */ |
1021 | pgmap->type = 0; | |
c83dee9b AS |
1022 | if (pgmap->type == MEMORY_DEVICE_PRIVATE) |
1023 | devm_release_mem_region(adev->dev, res->start, | |
1024 | res->end - res->start + 1); | |
814ab993 PY |
1025 | return PTR_ERR(r); |
1026 | } | |
1027 | ||
c46ebb6a PY |
1028 | pr_debug("reserve %ldMB system memory for VRAM pages struct\n", |
1029 | SVM_HMM_PAGE_STRUCT_SIZE(size) >> 20); | |
1030 | ||
1031 | amdgpu_amdkfd_reserve_system_mem(SVM_HMM_PAGE_STRUCT_SIZE(size)); | |
1032 | ||
4959e609 PY |
1033 | svm_range_set_max_pages(adev); |
1034 | ||
814ab993 PY |
1035 | pr_info("HMM registered %ldMB device memory\n", size >> 20); |
1036 | ||
1037 | return 0; | |
1038 | } |