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" | |
2fdcb55d | 31 | #include "amdgpu_res_cursor.h" |
814ab993 PY |
32 | #include "kfd_priv.h" |
33 | #include "kfd_svm.h" | |
34 | #include "kfd_migrate.h" | |
acac270d | 35 | #include "kfd_smi_events.h" |
814ab993 | 36 | |
a273bc99 PY |
37 | #ifdef dev_fmt |
38 | #undef dev_fmt | |
39 | #endif | |
7f161df1 | 40 | #define dev_fmt(fmt) "kfd_migrate: " fmt |
a273bc99 | 41 | |
50ea50cf PY |
42 | static uint64_t |
43 | svm_migrate_direct_mapping_addr(struct amdgpu_device *adev, uint64_t addr) | |
44 | { | |
45 | return addr + amdgpu_ttm_domain_start(adev, TTM_PL_VRAM); | |
46 | } | |
47 | ||
48 | static int | |
49 | svm_migrate_gart_map(struct amdgpu_ring *ring, uint64_t npages, | |
50 | dma_addr_t *addr, uint64_t *gart_addr, uint64_t flags) | |
51 | { | |
52 | struct amdgpu_device *adev = ring->adev; | |
53 | struct amdgpu_job *job; | |
54 | unsigned int num_dw, num_bytes; | |
55 | struct dma_fence *fence; | |
56 | uint64_t src_addr, dst_addr; | |
57 | uint64_t pte_flags; | |
58 | void *cpu_addr; | |
59 | int r; | |
60 | ||
61 | /* use gart window 0 */ | |
62 | *gart_addr = adev->gmc.gart_start; | |
63 | ||
64 | num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8); | |
65 | num_bytes = npages * 8; | |
66 | ||
41ce6d6d | 67 | r = amdgpu_job_alloc_with_ib(adev, &adev->mman.high_pr, |
f7d66fb2 CK |
68 | AMDGPU_FENCE_OWNER_UNDEFINED, |
69 | num_dw * 4 + num_bytes, | |
70 | AMDGPU_IB_POOL_DELAYED, | |
71 | &job); | |
50ea50cf PY |
72 | if (r) |
73 | return r; | |
74 | ||
75 | src_addr = num_dw * 4; | |
76 | src_addr += job->ibs[0].gpu_addr; | |
77 | ||
78 | dst_addr = amdgpu_bo_gpu_offset(adev->gart.bo); | |
79 | amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr, | |
ea9238a8 | 80 | dst_addr, num_bytes, 0); |
50ea50cf PY |
81 | |
82 | amdgpu_ring_pad_ib(ring, &job->ibs[0]); | |
83 | WARN_ON(job->ibs[0].length_dw > num_dw); | |
84 | ||
85 | pte_flags = AMDGPU_PTE_VALID | AMDGPU_PTE_READABLE; | |
86 | pte_flags |= AMDGPU_PTE_SYSTEM | AMDGPU_PTE_SNOOPED; | |
87 | if (!(flags & KFD_IOCTL_SVM_FLAG_GPU_RO)) | |
88 | pte_flags |= AMDGPU_PTE_WRITEABLE; | |
89 | pte_flags |= adev->gart.gart_pte_flags; | |
90 | ||
91 | cpu_addr = &job->ibs[0].ptr[num_dw]; | |
92 | ||
1b08dfb8 | 93 | amdgpu_gart_map(adev, 0, npages, addr, pte_flags, cpu_addr); |
f7d66fb2 | 94 | fence = amdgpu_job_submit(job); |
50ea50cf PY |
95 | dma_fence_put(fence); |
96 | ||
97 | return r; | |
50ea50cf PY |
98 | } |
99 | ||
100 | /** | |
101 | * svm_migrate_copy_memory_gart - sdma copy data between ram and vram | |
102 | * | |
103 | * @adev: amdgpu device the sdma ring running | |
bbe04dec IB |
104 | * @sys: system DMA pointer to be copied |
105 | * @vram: vram destination DMA pointer | |
50ea50cf PY |
106 | * @npages: number of pages to copy |
107 | * @direction: enum MIGRATION_COPY_DIR | |
108 | * @mfence: output, sdma fence to signal after sdma is done | |
109 | * | |
110 | * ram address uses GART table continuous entries mapping to ram pages, | |
111 | * vram address uses direct mapping of vram pages, which must have npages | |
112 | * number of continuous pages. | |
113 | * GART update and sdma uses same buf copy function ring, sdma is splited to | |
114 | * multiple GTT_MAX_PAGES transfer, all sdma operations are serialized, wait for | |
115 | * the last sdma finish fence which is returned to check copy memory is done. | |
116 | * | |
117 | * Context: Process context, takes and releases gtt_window_lock | |
118 | * | |
119 | * Return: | |
120 | * 0 - OK, otherwise error code | |
121 | */ | |
122 | ||
123 | static int | |
124 | svm_migrate_copy_memory_gart(struct amdgpu_device *adev, dma_addr_t *sys, | |
125 | uint64_t *vram, uint64_t npages, | |
126 | enum MIGRATION_COPY_DIR direction, | |
127 | struct dma_fence **mfence) | |
128 | { | |
129 | const uint64_t GTT_MAX_PAGES = AMDGPU_GTT_MAX_TRANSFER_SIZE; | |
130 | struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring; | |
131 | uint64_t gart_s, gart_d; | |
132 | struct dma_fence *next; | |
133 | uint64_t size; | |
134 | int r; | |
135 | ||
136 | mutex_lock(&adev->mman.gtt_window_lock); | |
137 | ||
138 | while (npages) { | |
139 | size = min(GTT_MAX_PAGES, npages); | |
140 | ||
141 | if (direction == FROM_VRAM_TO_RAM) { | |
142 | gart_s = svm_migrate_direct_mapping_addr(adev, *vram); | |
143 | r = svm_migrate_gart_map(ring, size, sys, &gart_d, 0); | |
144 | ||
145 | } else if (direction == FROM_RAM_TO_VRAM) { | |
146 | r = svm_migrate_gart_map(ring, size, sys, &gart_s, | |
147 | KFD_IOCTL_SVM_FLAG_GPU_RO); | |
148 | gart_d = svm_migrate_direct_mapping_addr(adev, *vram); | |
149 | } | |
150 | if (r) { | |
a273bc99 | 151 | dev_err(adev->dev, "fail %d create gart mapping\n", r); |
50ea50cf PY |
152 | goto out_unlock; |
153 | } | |
154 | ||
155 | r = amdgpu_copy_buffer(ring, gart_s, gart_d, size * PAGE_SIZE, | |
ea9238a8 | 156 | NULL, &next, false, true, 0); |
50ea50cf | 157 | if (r) { |
a273bc99 | 158 | dev_err(adev->dev, "fail %d to copy memory\n", r); |
50ea50cf PY |
159 | goto out_unlock; |
160 | } | |
161 | ||
162 | dma_fence_put(*mfence); | |
163 | *mfence = next; | |
164 | npages -= size; | |
165 | if (npages) { | |
166 | sys += size; | |
167 | vram += size; | |
168 | } | |
169 | } | |
170 | ||
171 | out_unlock: | |
172 | mutex_unlock(&adev->mman.gtt_window_lock); | |
173 | ||
174 | return r; | |
175 | } | |
176 | ||
177 | /** | |
178 | * svm_migrate_copy_done - wait for memory copy sdma is done | |
179 | * | |
180 | * @adev: amdgpu device the sdma memory copy is executing on | |
181 | * @mfence: migrate fence | |
182 | * | |
183 | * Wait for dma fence is signaled, if the copy ssplit into multiple sdma | |
184 | * operations, this is the last sdma operation fence. | |
185 | * | |
186 | * Context: called after svm_migrate_copy_memory | |
187 | * | |
188 | * Return: | |
189 | * 0 - success | |
190 | * otherwise - error code from dma fence signal | |
191 | */ | |
48ff079b | 192 | static int |
50ea50cf PY |
193 | svm_migrate_copy_done(struct amdgpu_device *adev, struct dma_fence *mfence) |
194 | { | |
195 | int r = 0; | |
196 | ||
197 | if (mfence) { | |
198 | r = dma_fence_wait(mfence, false); | |
199 | dma_fence_put(mfence); | |
200 | pr_debug("sdma copy memory fence done\n"); | |
201 | } | |
202 | ||
203 | return r; | |
204 | } | |
205 | ||
0b0e518d FK |
206 | unsigned long |
207 | svm_migrate_addr_to_pfn(struct amdgpu_device *adev, unsigned long addr) | |
208 | { | |
610dab11 | 209 | return (addr + adev->kfd.pgmap.range.start) >> PAGE_SHIFT; |
0b0e518d FK |
210 | } |
211 | ||
212 | static void | |
213 | svm_migrate_get_vram_page(struct svm_range *prange, unsigned long pfn) | |
214 | { | |
215 | struct page *page; | |
216 | ||
217 | page = pfn_to_page(pfn); | |
7981ec65 AS |
218 | svm_range_bo_ref(prange->svm_bo); |
219 | page->zone_device_data = prange->svm_bo; | |
ef233450 | 220 | zone_device_page_init(page); |
0b0e518d FK |
221 | } |
222 | ||
223 | static void | |
224 | svm_migrate_put_vram_page(struct amdgpu_device *adev, unsigned long addr) | |
225 | { | |
226 | struct page *page; | |
227 | ||
228 | page = pfn_to_page(svm_migrate_addr_to_pfn(adev, addr)); | |
229 | unlock_page(page); | |
230 | put_page(page); | |
231 | } | |
232 | ||
48ff079b FK |
233 | static unsigned long |
234 | svm_migrate_addr(struct amdgpu_device *adev, struct page *page) | |
235 | { | |
236 | unsigned long addr; | |
237 | ||
238 | addr = page_to_pfn(page) << PAGE_SHIFT; | |
610dab11 | 239 | return (addr - adev->kfd.pgmap.range.start); |
48ff079b FK |
240 | } |
241 | ||
242 | static struct page * | |
243 | svm_migrate_get_sys_page(struct vm_area_struct *vma, unsigned long addr) | |
244 | { | |
245 | struct page *page; | |
246 | ||
247 | page = alloc_page_vma(GFP_HIGHUSER, vma, addr); | |
248 | if (page) | |
249 | lock_page(page); | |
250 | ||
251 | return page; | |
252 | } | |
253 | ||
2e4ec251 | 254 | static void svm_migrate_put_sys_page(unsigned long addr) |
48ff079b FK |
255 | { |
256 | struct page *page; | |
257 | ||
258 | page = pfn_to_page(addr >> PAGE_SHIFT); | |
259 | unlock_page(page); | |
260 | put_page(page); | |
261 | } | |
0b0e518d | 262 | |
740a451b FK |
263 | static unsigned long svm_migrate_unsuccessful_pages(struct migrate_vma *migrate) |
264 | { | |
265 | unsigned long upages = 0; | |
266 | unsigned long i; | |
267 | ||
268 | for (i = 0; i < migrate->npages; i++) { | |
269 | if (migrate->src[i] & MIGRATE_PFN_VALID && | |
270 | !(migrate->src[i] & MIGRATE_PFN_MIGRATE)) | |
271 | upages++; | |
272 | } | |
273 | return upages; | |
274 | } | |
275 | ||
0b0e518d | 276 | static int |
5fb34bd9 | 277 | svm_migrate_copy_to_vram(struct kfd_node *node, struct svm_range *prange, |
0b0e518d | 278 | struct migrate_vma *migrate, struct dma_fence **mfence, |
9473b6b2 | 279 | dma_addr_t *scratch, uint64_t ttm_res_offset) |
0b0e518d | 280 | { |
5fb34bd9 AS |
281 | uint64_t npages = migrate->cpages; |
282 | struct amdgpu_device *adev = node->adev; | |
0b0e518d | 283 | struct device *dev = adev->dev; |
2fdcb55d | 284 | struct amdgpu_res_cursor cursor; |
0b0e518d FK |
285 | dma_addr_t *src; |
286 | uint64_t *dst; | |
0b0e518d | 287 | uint64_t i, j; |
a40eb089 | 288 | int r; |
0b0e518d | 289 | |
9473b6b2 XC |
290 | pr_debug("svms 0x%p [0x%lx 0x%lx 0x%llx]\n", prange->svms, prange->start, |
291 | prange->last, ttm_res_offset); | |
0b0e518d FK |
292 | |
293 | src = scratch; | |
294 | dst = (uint64_t *)(scratch + npages); | |
295 | ||
9473b6b2 | 296 | amdgpu_res_first(prange->ttm_res, ttm_res_offset, |
2fdcb55d | 297 | npages << PAGE_SHIFT, &cursor); |
0b0e518d FK |
298 | for (i = j = 0; i < npages; i++) { |
299 | struct page *spage; | |
300 | ||
c969c5fd PY |
301 | dst[i] = cursor.start + (j << PAGE_SHIFT); |
302 | migrate->dst[i] = svm_migrate_addr_to_pfn(adev, dst[i]); | |
303 | svm_migrate_get_vram_page(prange, migrate->dst[i]); | |
304 | migrate->dst[i] = migrate_pfn(migrate->dst[i]); | |
305 | ||
6ffecc94 AS |
306 | spage = migrate_pfn_to_page(migrate->src[i]); |
307 | if (spage && !is_zone_device_page(spage)) { | |
0b0e518d FK |
308 | src[i] = dma_map_page(dev, spage, 0, PAGE_SIZE, |
309 | DMA_TO_DEVICE); | |
310 | r = dma_mapping_error(dev, src[i]); | |
311 | if (r) { | |
5fb34bd9 | 312 | dev_err(dev, "%s: fail %d dma_map_page\n", |
7f161df1 | 313 | __func__, r); |
0b0e518d FK |
314 | goto out_free_vram_pages; |
315 | } | |
316 | } else { | |
317 | if (j) { | |
318 | r = svm_migrate_copy_memory_gart( | |
319 | adev, src + i - j, | |
320 | dst + i - j, j, | |
321 | FROM_RAM_TO_VRAM, | |
322 | mfence); | |
323 | if (r) | |
324 | goto out_free_vram_pages; | |
88467db6 | 325 | amdgpu_res_next(&cursor, (j + 1) << PAGE_SHIFT); |
0b0e518d FK |
326 | j = 0; |
327 | } else { | |
2fdcb55d | 328 | amdgpu_res_next(&cursor, PAGE_SIZE); |
0b0e518d FK |
329 | } |
330 | continue; | |
331 | } | |
332 | ||
a273bc99 PY |
333 | pr_debug_ratelimited("dma mapping src to 0x%llx, pfn 0x%lx\n", |
334 | src[i] >> PAGE_SHIFT, page_to_pfn(spage)); | |
0b0e518d | 335 | |
2fdcb55d | 336 | if (j >= (cursor.size >> PAGE_SHIFT) - 1 && i < npages - 1) { |
0b0e518d FK |
337 | r = svm_migrate_copy_memory_gart(adev, src + i - j, |
338 | dst + i - j, j + 1, | |
339 | FROM_RAM_TO_VRAM, | |
340 | mfence); | |
341 | if (r) | |
342 | goto out_free_vram_pages; | |
2fdcb55d | 343 | amdgpu_res_next(&cursor, (j + 1) * PAGE_SIZE); |
2243f493 | 344 | j = 0; |
0b0e518d FK |
345 | } else { |
346 | j++; | |
347 | } | |
348 | } | |
349 | ||
350 | r = svm_migrate_copy_memory_gart(adev, src + i - j, dst + i - j, j, | |
351 | FROM_RAM_TO_VRAM, mfence); | |
352 | ||
353 | out_free_vram_pages: | |
354 | if (r) { | |
355 | pr_debug("failed %d to copy memory to vram\n", r); | |
356 | while (i--) { | |
357 | svm_migrate_put_vram_page(adev, dst[i]); | |
358 | migrate->dst[i] = 0; | |
359 | } | |
360 | } | |
361 | ||
3bf8282c AS |
362 | #ifdef DEBUG_FORCE_MIXED_DOMAINS |
363 | for (i = 0, j = 0; i < npages; i += 4, j++) { | |
364 | if (j & 1) | |
365 | continue; | |
366 | svm_migrate_put_vram_page(adev, dst[i]); | |
367 | migrate->dst[i] = 0; | |
368 | svm_migrate_put_vram_page(adev, dst[i + 1]); | |
369 | migrate->dst[i + 1] = 0; | |
370 | svm_migrate_put_vram_page(adev, dst[i + 2]); | |
371 | migrate->dst[i + 2] = 0; | |
372 | svm_migrate_put_vram_page(adev, dst[i + 3]); | |
373 | migrate->dst[i + 3] = 0; | |
374 | } | |
375 | #endif | |
0fb44d54 | 376 | |
0b0e518d FK |
377 | return r; |
378 | } | |
379 | ||
ca432dcc | 380 | static long |
5fb34bd9 | 381 | svm_migrate_vma_to_vram(struct kfd_node *node, struct svm_range *prange, |
0b0e518d | 382 | struct vm_area_struct *vma, uint64_t start, |
9473b6b2 | 383 | uint64_t end, uint32_t trigger, uint64_t ttm_res_offset) |
0b0e518d | 384 | { |
acac270d | 385 | struct kfd_process *p = container_of(prange->svms, struct kfd_process, svms); |
0b0e518d | 386 | uint64_t npages = (end - start) >> PAGE_SHIFT; |
5fb34bd9 | 387 | struct amdgpu_device *adev = node->adev; |
d4ebc200 | 388 | struct kfd_process_device *pdd; |
0b0e518d | 389 | struct dma_fence *mfence = NULL; |
16ce101d | 390 | struct migrate_vma migrate = { 0 }; |
75fa98d6 | 391 | unsigned long cpages = 0; |
006ad514 | 392 | unsigned long mpages = 0; |
0b0e518d | 393 | dma_addr_t *scratch; |
0b0e518d FK |
394 | void *buf; |
395 | int r = -ENOMEM; | |
0b0e518d FK |
396 | |
397 | memset(&migrate, 0, sizeof(migrate)); | |
398 | migrate.vma = vma; | |
399 | migrate.start = start; | |
400 | migrate.end = end; | |
401 | migrate.flags = MIGRATE_VMA_SELECT_SYSTEM; | |
3a61dae8 | 402 | migrate.pgmap_owner = SVM_ADEV_PGMAP_OWNER(adev); |
0b0e518d | 403 | |
cc9d82fc YW |
404 | buf = kvcalloc(npages, |
405 | 2 * sizeof(*migrate.src) + sizeof(uint64_t) + sizeof(dma_addr_t), | |
406 | GFP_KERNEL); | |
0b0e518d FK |
407 | if (!buf) |
408 | goto out; | |
409 | ||
410 | migrate.src = buf; | |
411 | migrate.dst = migrate.src + npages; | |
412 | scratch = (dma_addr_t *)(migrate.dst + npages); | |
413 | ||
d6e924ad | 414 | kfd_smi_event_migration_start(node, p->lead_thread->pid, |
acac270d | 415 | start >> PAGE_SHIFT, end >> PAGE_SHIFT, |
d6e924ad | 416 | 0, node->id, prange->prefetch_loc, |
acac270d PY |
417 | prange->preferred_loc, trigger); |
418 | ||
0b0e518d FK |
419 | r = migrate_vma_setup(&migrate); |
420 | if (r) { | |
7f161df1 AS |
421 | dev_err(adev->dev, "%s: vma setup fail %d range [0x%lx 0x%lx]\n", |
422 | __func__, r, prange->start, prange->last); | |
0b0e518d FK |
423 | goto out_free; |
424 | } | |
0b0e518d | 425 | |
75fa98d6 PY |
426 | cpages = migrate.cpages; |
427 | if (!cpages) { | |
ca432dcc PY |
428 | pr_debug("failed collect migrate sys pages [0x%lx 0x%lx]\n", |
429 | prange->start, prange->last); | |
430 | goto out_free; | |
0b0e518d | 431 | } |
75fa98d6 | 432 | if (cpages != npages) |
a546a276 | 433 | pr_debug("partial migration, 0x%lx/0x%llx pages collected\n", |
75fa98d6 PY |
434 | cpages, npages); |
435 | else | |
a546a276 | 436 | pr_debug("0x%lx pages collected\n", cpages); |
0b0e518d | 437 | |
5fb34bd9 | 438 | r = svm_migrate_copy_to_vram(node, prange, &migrate, &mfence, scratch, ttm_res_offset); |
ca432dcc | 439 | migrate_vma_pages(&migrate); |
33c6bd98 | 440 | |
ca432dcc PY |
441 | svm_migrate_copy_done(adev, mfence); |
442 | migrate_vma_finalize(&migrate); | |
443 | ||
006ad514 XC |
444 | mpages = cpages - svm_migrate_unsuccessful_pages(&migrate); |
445 | pr_debug("successful/cpages/npages 0x%lx/0x%lx/0x%lx\n", | |
446 | mpages, cpages, migrate.npages); | |
447 | ||
d6e924ad | 448 | kfd_smi_event_migration_end(node, p->lead_thread->pid, |
acac270d | 449 | start >> PAGE_SHIFT, end >> PAGE_SHIFT, |
d6e924ad | 450 | 0, node->id, trigger); |
acac270d | 451 | |
df954b69 | 452 | svm_range_dma_unmap_dev(adev->dev, scratch, 0, npages); |
0b0e518d FK |
453 | |
454 | out_free: | |
455 | kvfree(buf); | |
456 | out: | |
006ad514 | 457 | if (!r && mpages) { |
5fb34bd9 | 458 | pdd = svm_range_get_pdd_by_node(prange, node); |
d4ebc200 | 459 | if (pdd) |
006ad514 | 460 | WRITE_ONCE(pdd->page_in, pdd->page_in + mpages); |
d4ebc200 | 461 | |
006ad514 | 462 | return mpages; |
ca432dcc | 463 | } |
0b0e518d FK |
464 | return r; |
465 | } | |
466 | ||
467 | /** | |
468 | * svm_migrate_ram_to_vram - migrate svm range from system to device | |
469 | * @prange: range structure | |
470 | * @best_loc: the device to migrate to | |
a546a276 XC |
471 | * @start_mgr: start page to migrate |
472 | * @last_mgr: last page to migrate | |
cda0f85b | 473 | * @mm: the process mm structure |
acac270d | 474 | * @trigger: reason of migration |
0b0e518d FK |
475 | * |
476 | * Context: Process context, caller hold mmap read lock, svms lock, prange lock | |
477 | * | |
478 | * Return: | |
479 | * 0 - OK, otherwise error code | |
480 | */ | |
1a3b2b5d FK |
481 | static int |
482 | svm_migrate_ram_to_vram(struct svm_range *prange, uint32_t best_loc, | |
a546a276 | 483 | unsigned long start_mgr, unsigned long last_mgr, |
acac270d | 484 | struct mm_struct *mm, uint32_t trigger) |
0b0e518d FK |
485 | { |
486 | unsigned long addr, start, end; | |
487 | struct vm_area_struct *vma; | |
9473b6b2 | 488 | uint64_t ttm_res_offset; |
5fb34bd9 | 489 | struct kfd_node *node; |
006ad514 | 490 | unsigned long mpages = 0; |
ca432dcc | 491 | long r = 0; |
0b0e518d | 492 | |
a546a276 XC |
493 | if (start_mgr < prange->start || last_mgr > prange->last) { |
494 | pr_debug("range [0x%lx 0x%lx] out prange [0x%lx 0x%lx]\n", | |
495 | start_mgr, last_mgr, prange->start, prange->last); | |
496 | return -EFAULT; | |
0b0e518d FK |
497 | } |
498 | ||
5fb34bd9 AS |
499 | node = svm_range_get_node_by_id(prange, best_loc); |
500 | if (!node) { | |
501 | pr_debug("failed to get kfd node by id 0x%x\n", best_loc); | |
0b0e518d FK |
502 | return -ENODEV; |
503 | } | |
504 | ||
a546a276 XC |
505 | pr_debug("svms 0x%p [0x%lx 0x%lx] in [0x%lx 0x%lx] to gpu 0x%x\n", |
506 | prange->svms, start_mgr, last_mgr, prange->start, prange->last, | |
507 | best_loc); | |
0b0e518d | 508 | |
a546a276 XC |
509 | start = start_mgr << PAGE_SHIFT; |
510 | end = (last_mgr + 1) << PAGE_SHIFT; | |
0fb44d54 | 511 | |
63335b38 MJ |
512 | r = amdgpu_amdkfd_reserve_mem_limit(node->adev, |
513 | prange->npages * PAGE_SIZE, | |
514 | KFD_IOC_ALLOC_MEM_FLAGS_VRAM, | |
515 | node->xcp ? node->xcp->id : 0); | |
516 | if (r) { | |
517 | dev_dbg(node->adev->dev, "failed to reserve VRAM, r: %ld\n", r); | |
518 | return -ENOSPC; | |
519 | } | |
520 | ||
5fb34bd9 | 521 | r = svm_range_vram_node_new(node, prange, true); |
0fb44d54 | 522 | if (r) { |
5fb34bd9 | 523 | dev_dbg(node->adev->dev, "fail %ld to alloc vram\n", r); |
63335b38 | 524 | goto out; |
0fb44d54 | 525 | } |
a546a276 | 526 | ttm_res_offset = (start_mgr - prange->start + prange->offset) << PAGE_SHIFT; |
0b0e518d | 527 | |
0b0e518d FK |
528 | for (addr = start; addr < end;) { |
529 | unsigned long next; | |
530 | ||
3a3e841d DW |
531 | vma = vma_lookup(mm, addr); |
532 | if (!vma) | |
0b0e518d FK |
533 | break; |
534 | ||
535 | next = min(vma->vm_end, end); | |
5fb34bd9 | 536 | r = svm_migrate_vma_to_vram(node, prange, vma, addr, next, trigger, ttm_res_offset); |
ca432dcc PY |
537 | if (r < 0) { |
538 | pr_debug("failed %ld to migrate\n", r); | |
0b0e518d | 539 | break; |
ca432dcc | 540 | } else { |
006ad514 | 541 | mpages += r; |
0b0e518d | 542 | } |
9473b6b2 | 543 | ttm_res_offset += next - addr; |
0b0e518d FK |
544 | addr = next; |
545 | } | |
546 | ||
006ad514 | 547 | if (mpages) { |
0b0e518d | 548 | prange->actual_loc = best_loc; |
006ad514 | 549 | prange->vram_pages += mpages; |
a546a276 XC |
550 | } else if (!prange->actual_loc) { |
551 | /* if no page migrated and all pages from prange are at | |
552 | * sys ram drop svm_bo got from svm_range_vram_node_new | |
553 | */ | |
0fb44d54 | 554 | svm_range_vram_node_free(prange); |
ab3400eb | 555 | } |
0b0e518d | 556 | |
63335b38 MJ |
557 | out: |
558 | amdgpu_amdkfd_unreserve_mem_limit(node->adev, | |
559 | prange->npages * PAGE_SIZE, | |
560 | KFD_IOC_ALLOC_MEM_FLAGS_VRAM, | |
561 | node->xcp ? node->xcp->id : 0); | |
ca432dcc | 562 | return r < 0 ? r : 0; |
0b0e518d FK |
563 | } |
564 | ||
814ab993 PY |
565 | static void svm_migrate_page_free(struct page *page) |
566 | { | |
7981ec65 AS |
567 | struct svm_range_bo *svm_bo = page->zone_device_data; |
568 | ||
569 | if (svm_bo) { | |
a273bc99 | 570 | pr_debug_ratelimited("ref: %d\n", kref_read(&svm_bo->kref)); |
69879b30 | 571 | svm_range_bo_unref_async(svm_bo); |
7981ec65 | 572 | } |
48ff079b FK |
573 | } |
574 | ||
575 | static int | |
576 | svm_migrate_copy_to_ram(struct amdgpu_device *adev, struct svm_range *prange, | |
577 | struct migrate_vma *migrate, struct dma_fence **mfence, | |
1ade5f84 | 578 | dma_addr_t *scratch, uint64_t npages) |
48ff079b | 579 | { |
48ff079b FK |
580 | struct device *dev = adev->dev; |
581 | uint64_t *src; | |
582 | dma_addr_t *dst; | |
583 | struct page *dpage; | |
584 | uint64_t i = 0, j; | |
585 | uint64_t addr; | |
586 | int r = 0; | |
587 | ||
588 | pr_debug("svms 0x%p [0x%lx 0x%lx]\n", prange->svms, prange->start, | |
589 | prange->last); | |
590 | ||
961df308 | 591 | addr = migrate->start; |
48ff079b FK |
592 | |
593 | src = (uint64_t *)(scratch + npages); | |
594 | dst = scratch; | |
595 | ||
1ade5f84 | 596 | for (i = 0, j = 0; i < npages; i++, addr += PAGE_SIZE) { |
48ff079b FK |
597 | struct page *spage; |
598 | ||
599 | spage = migrate_pfn_to_page(migrate->src[i]); | |
1ade5f84 AS |
600 | if (!spage || !is_zone_device_page(spage)) { |
601 | pr_debug("invalid page. Could be in CPU already svms 0x%p [0x%lx 0x%lx]\n", | |
48ff079b | 602 | prange->svms, prange->start, prange->last); |
1ade5f84 AS |
603 | if (j) { |
604 | r = svm_migrate_copy_memory_gart(adev, dst + i - j, | |
605 | src + i - j, j, | |
606 | FROM_VRAM_TO_RAM, | |
607 | mfence); | |
608 | if (r) | |
609 | goto out_oom; | |
610 | j = 0; | |
611 | } | |
612 | continue; | |
48ff079b FK |
613 | } |
614 | src[i] = svm_migrate_addr(adev, spage); | |
88467db6 | 615 | if (j > 0 && src[i] != src[i - 1] + PAGE_SIZE) { |
48ff079b FK |
616 | r = svm_migrate_copy_memory_gart(adev, dst + i - j, |
617 | src + i - j, j, | |
618 | FROM_VRAM_TO_RAM, | |
619 | mfence); | |
620 | if (r) | |
621 | goto out_oom; | |
622 | j = 0; | |
623 | } | |
624 | ||
625 | dpage = svm_migrate_get_sys_page(migrate->vma, addr); | |
626 | if (!dpage) { | |
627 | pr_debug("failed get page svms 0x%p [0x%lx 0x%lx]\n", | |
628 | prange->svms, prange->start, prange->last); | |
629 | r = -ENOMEM; | |
630 | goto out_oom; | |
631 | } | |
632 | ||
633 | dst[i] = dma_map_page(dev, dpage, 0, PAGE_SIZE, DMA_FROM_DEVICE); | |
634 | r = dma_mapping_error(dev, dst[i]); | |
635 | if (r) { | |
7f161df1 | 636 | dev_err(adev->dev, "%s: fail %d dma_map_page\n", __func__, r); |
48ff079b FK |
637 | goto out_oom; |
638 | } | |
639 | ||
a273bc99 PY |
640 | pr_debug_ratelimited("dma mapping dst to 0x%llx, pfn 0x%lx\n", |
641 | dst[i] >> PAGE_SHIFT, page_to_pfn(dpage)); | |
48ff079b FK |
642 | |
643 | migrate->dst[i] = migrate_pfn(page_to_pfn(dpage)); | |
1ade5f84 | 644 | j++; |
48ff079b FK |
645 | } |
646 | ||
647 | r = svm_migrate_copy_memory_gart(adev, dst + i - j, src + i - j, j, | |
648 | FROM_VRAM_TO_RAM, mfence); | |
649 | ||
650 | out_oom: | |
651 | if (r) { | |
652 | pr_debug("failed %d copy to ram\n", r); | |
653 | while (i--) { | |
654 | svm_migrate_put_sys_page(dst[i]); | |
655 | migrate->dst[i] = 0; | |
656 | } | |
657 | } | |
658 | ||
659 | return r; | |
660 | } | |
661 | ||
9527b9ca PY |
662 | /** |
663 | * svm_migrate_vma_to_ram - migrate range inside one vma from device to system | |
664 | * | |
9527b9ca PY |
665 | * @prange: svm range structure |
666 | * @vma: vm_area_struct that range [start, end] belongs to | |
667 | * @start: range start virtual address in pages | |
668 | * @end: range end virtual address in pages | |
b3a02e8b SS |
669 | * @node: kfd node device to migrate from |
670 | * @trigger: reason of migration | |
671 | * @fault_page: is from vmf->page, svm_migrate_to_ram(), this is CPU page fault callback | |
9527b9ca PY |
672 | * |
673 | * Context: Process context, caller hold mmap read lock, prange->migrate_mutex | |
674 | * | |
675 | * Return: | |
9527b9ca | 676 | * negative values - indicate error |
a546a276 | 677 | * positive values or zero - number of pages got migrated |
9527b9ca | 678 | */ |
ca432dcc | 679 | static long |
5fb34bd9 | 680 | svm_migrate_vma_to_ram(struct kfd_node *node, struct svm_range *prange, |
acac270d | 681 | struct vm_area_struct *vma, uint64_t start, uint64_t end, |
16ce101d | 682 | uint32_t trigger, struct page *fault_page) |
48ff079b | 683 | { |
acac270d | 684 | struct kfd_process *p = container_of(prange->svms, struct kfd_process, svms); |
48ff079b | 685 | uint64_t npages = (end - start) >> PAGE_SHIFT; |
740a451b FK |
686 | unsigned long upages = npages; |
687 | unsigned long cpages = 0; | |
a546a276 | 688 | unsigned long mpages = 0; |
5fb34bd9 | 689 | struct amdgpu_device *adev = node->adev; |
d4ebc200 | 690 | struct kfd_process_device *pdd; |
48ff079b | 691 | struct dma_fence *mfence = NULL; |
16ce101d | 692 | struct migrate_vma migrate = { 0 }; |
48ff079b | 693 | dma_addr_t *scratch; |
48ff079b FK |
694 | void *buf; |
695 | int r = -ENOMEM; | |
696 | ||
697 | memset(&migrate, 0, sizeof(migrate)); | |
698 | migrate.vma = vma; | |
699 | migrate.start = start; | |
700 | migrate.end = end; | |
3a61dae8 | 701 | migrate.pgmap_owner = SVM_ADEV_PGMAP_OWNER(adev); |
c83dee9b AS |
702 | if (adev->gmc.xgmi.connected_to_cpu) |
703 | migrate.flags = MIGRATE_VMA_SELECT_DEVICE_COHERENT; | |
704 | else | |
705 | migrate.flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE; | |
48ff079b | 706 | |
cc9d82fc YW |
707 | buf = kvcalloc(npages, |
708 | 2 * sizeof(*migrate.src) + sizeof(uint64_t) + sizeof(dma_addr_t), | |
709 | GFP_KERNEL); | |
48ff079b FK |
710 | if (!buf) |
711 | goto out; | |
712 | ||
713 | migrate.src = buf; | |
714 | migrate.dst = migrate.src + npages; | |
16ce101d | 715 | migrate.fault_page = fault_page; |
48ff079b FK |
716 | scratch = (dma_addr_t *)(migrate.dst + npages); |
717 | ||
d6e924ad | 718 | kfd_smi_event_migration_start(node, p->lead_thread->pid, |
acac270d | 719 | start >> PAGE_SHIFT, end >> PAGE_SHIFT, |
d6e924ad | 720 | node->id, 0, prange->prefetch_loc, |
acac270d PY |
721 | prange->preferred_loc, trigger); |
722 | ||
48ff079b FK |
723 | r = migrate_vma_setup(&migrate); |
724 | if (r) { | |
7f161df1 AS |
725 | dev_err(adev->dev, "%s: vma setup fail %d range [0x%lx 0x%lx]\n", |
726 | __func__, r, prange->start, prange->last); | |
48ff079b FK |
727 | goto out_free; |
728 | } | |
729 | ||
75fa98d6 PY |
730 | cpages = migrate.cpages; |
731 | if (!cpages) { | |
48ff079b FK |
732 | pr_debug("failed collect migrate device pages [0x%lx 0x%lx]\n", |
733 | prange->start, prange->last); | |
740a451b | 734 | upages = svm_migrate_unsuccessful_pages(&migrate); |
ca432dcc | 735 | goto out_free; |
48ff079b | 736 | } |
75fa98d6 | 737 | if (cpages != npages) |
a546a276 | 738 | pr_debug("partial migration, 0x%lx/0x%llx pages collected\n", |
75fa98d6 PY |
739 | cpages, npages); |
740 | else | |
a546a276 | 741 | pr_debug("0x%lx pages collected\n", cpages); |
48ff079b | 742 | |
ca432dcc PY |
743 | r = svm_migrate_copy_to_ram(adev, prange, &migrate, &mfence, |
744 | scratch, npages); | |
745 | migrate_vma_pages(&migrate); | |
33c6bd98 | 746 | |
740a451b FK |
747 | upages = svm_migrate_unsuccessful_pages(&migrate); |
748 | pr_debug("unsuccessful/cpages/npages 0x%lx/0x%lx/0x%lx\n", | |
749 | upages, cpages, migrate.npages); | |
33c6bd98 | 750 | |
ca432dcc PY |
751 | svm_migrate_copy_done(adev, mfence); |
752 | migrate_vma_finalize(&migrate); | |
acac270d | 753 | |
d6e924ad | 754 | kfd_smi_event_migration_end(node, p->lead_thread->pid, |
acac270d | 755 | start >> PAGE_SHIFT, end >> PAGE_SHIFT, |
d6e924ad | 756 | node->id, 0, trigger); |
acac270d | 757 | |
df954b69 | 758 | svm_range_dma_unmap_dev(adev->dev, scratch, 0, npages); |
48ff079b FK |
759 | |
760 | out_free: | |
761 | kvfree(buf); | |
762 | out: | |
75fa98d6 | 763 | if (!r && cpages) { |
a546a276 | 764 | mpages = cpages - upages; |
5fb34bd9 | 765 | pdd = svm_range_get_pdd_by_node(prange, node); |
d4ebc200 | 766 | if (pdd) |
a546a276 | 767 | WRITE_ONCE(pdd->page_out, pdd->page_out + mpages); |
d4ebc200 | 768 | } |
a546a276 XC |
769 | |
770 | return r ? r : mpages; | |
48ff079b FK |
771 | } |
772 | ||
773 | /** | |
774 | * svm_migrate_vram_to_ram - migrate svm range from device to system | |
775 | * @prange: range structure | |
776 | * @mm: process mm, use current->mm if NULL | |
a546a276 XC |
777 | * @start_mgr: start page need be migrated to sys ram |
778 | * @last_mgr: last page need be migrated to sys ram | |
acac270d | 779 | * @trigger: reason of migration |
b3a02e8b | 780 | * @fault_page: is from vmf->page, svm_migrate_to_ram(), this is CPU page fault callback |
48ff079b | 781 | * |
9527b9ca | 782 | * Context: Process context, caller hold mmap read lock, prange->migrate_mutex |
48ff079b FK |
783 | * |
784 | * Return: | |
785 | * 0 - OK, otherwise error code | |
786 | */ | |
acac270d | 787 | int svm_migrate_vram_to_ram(struct svm_range *prange, struct mm_struct *mm, |
a546a276 | 788 | unsigned long start_mgr, unsigned long last_mgr, |
16ce101d | 789 | uint32_t trigger, struct page *fault_page) |
48ff079b | 790 | { |
5fb34bd9 | 791 | struct kfd_node *node; |
48ff079b FK |
792 | struct vm_area_struct *vma; |
793 | unsigned long addr; | |
794 | unsigned long start; | |
795 | unsigned long end; | |
a546a276 | 796 | unsigned long mpages = 0; |
ca432dcc | 797 | long r = 0; |
48ff079b | 798 | |
a546a276 | 799 | /* this pragne has no any vram page to migrate to sys ram */ |
48ff079b FK |
800 | if (!prange->actual_loc) { |
801 | pr_debug("[0x%lx 0x%lx] already migrated to ram\n", | |
802 | prange->start, prange->last); | |
803 | return 0; | |
804 | } | |
805 | ||
a546a276 XC |
806 | if (start_mgr < prange->start || last_mgr > prange->last) { |
807 | pr_debug("range [0x%lx 0x%lx] out prange [0x%lx 0x%lx]\n", | |
808 | start_mgr, last_mgr, prange->start, prange->last); | |
809 | return -EFAULT; | |
810 | } | |
811 | ||
5fb34bd9 AS |
812 | node = svm_range_get_node_by_id(prange, prange->actual_loc); |
813 | if (!node) { | |
814 | pr_debug("failed to get kfd node by id 0x%x\n", prange->actual_loc); | |
48ff079b FK |
815 | return -ENODEV; |
816 | } | |
48ff079b | 817 | pr_debug("svms 0x%p prange 0x%p [0x%lx 0x%lx] from gpu 0x%x to ram\n", |
a546a276 | 818 | prange->svms, prange, start_mgr, last_mgr, |
48ff079b FK |
819 | prange->actual_loc); |
820 | ||
a546a276 XC |
821 | start = start_mgr << PAGE_SHIFT; |
822 | end = (last_mgr + 1) << PAGE_SHIFT; | |
48ff079b FK |
823 | |
824 | for (addr = start; addr < end;) { | |
825 | unsigned long next; | |
826 | ||
3a3e841d DW |
827 | vma = vma_lookup(mm, addr); |
828 | if (!vma) { | |
9527b9ca PY |
829 | pr_debug("failed to find vma for prange %p\n", prange); |
830 | r = -EFAULT; | |
48ff079b | 831 | break; |
9527b9ca | 832 | } |
48ff079b FK |
833 | |
834 | next = min(vma->vm_end, end); | |
5fb34bd9 | 835 | r = svm_migrate_vma_to_ram(node, prange, vma, addr, next, trigger, |
16ce101d | 836 | fault_page); |
ca432dcc | 837 | if (r < 0) { |
9527b9ca | 838 | pr_debug("failed %ld to migrate prange %p\n", r, prange); |
48ff079b | 839 | break; |
ca432dcc | 840 | } else { |
a546a276 | 841 | mpages += r; |
48ff079b FK |
842 | } |
843 | addr = next; | |
844 | } | |
845 | ||
a546a276 XC |
846 | if (r >= 0) { |
847 | prange->vram_pages -= mpages; | |
848 | ||
849 | /* prange does not have vram page set its actual_loc to system | |
850 | * and drop its svm_bo ref | |
851 | */ | |
852 | if (prange->vram_pages == 0 && prange->ttm_res) { | |
853 | prange->actual_loc = 0; | |
854 | svm_range_vram_node_free(prange); | |
855 | } | |
48ff079b | 856 | } |
ca432dcc PY |
857 | |
858 | return r < 0 ? r : 0; | |
814ab993 PY |
859 | } |
860 | ||
1a3b2b5d FK |
861 | /** |
862 | * svm_migrate_vram_to_vram - migrate svm range from device to device | |
863 | * @prange: range structure | |
864 | * @best_loc: the device to migrate to | |
a546a276 XC |
865 | * @start: start page need be migrated to sys ram |
866 | * @last: last page need be migrated to sys ram | |
1a3b2b5d | 867 | * @mm: process mm, use current->mm if NULL |
acac270d | 868 | * @trigger: reason of migration |
1a3b2b5d FK |
869 | * |
870 | * Context: Process context, caller hold mmap read lock, svms lock, prange lock | |
871 | * | |
a546a276 XC |
872 | * migrate all vram pages in prange to sys ram, then migrate |
873 | * [start, last] pages from sys ram to gpu node best_loc. | |
874 | * | |
1a3b2b5d FK |
875 | * Return: |
876 | * 0 - OK, otherwise error code | |
877 | */ | |
878 | static int | |
879 | svm_migrate_vram_to_vram(struct svm_range *prange, uint32_t best_loc, | |
a546a276 XC |
880 | unsigned long start, unsigned long last, |
881 | struct mm_struct *mm, uint32_t trigger) | |
1a3b2b5d | 882 | { |
740a451b | 883 | int r, retries = 3; |
1a3b2b5d FK |
884 | |
885 | /* | |
886 | * TODO: for both devices with PCIe large bar or on same xgmi hive, skip | |
887 | * system memory as migration bridge | |
888 | */ | |
889 | ||
890 | pr_debug("from gpu 0x%x to gpu 0x%x\n", prange->actual_loc, best_loc); | |
891 | ||
740a451b | 892 | do { |
a546a276 XC |
893 | r = svm_migrate_vram_to_ram(prange, mm, prange->start, prange->last, |
894 | trigger, NULL); | |
740a451b FK |
895 | if (r) |
896 | return r; | |
897 | } while (prange->actual_loc && --retries); | |
898 | ||
899 | if (prange->actual_loc) | |
900 | return -EDEADLK; | |
1a3b2b5d | 901 | |
a546a276 | 902 | return svm_migrate_ram_to_vram(prange, best_loc, start, last, mm, trigger); |
1a3b2b5d FK |
903 | } |
904 | ||
905 | int | |
906 | svm_migrate_to_vram(struct svm_range *prange, uint32_t best_loc, | |
a546a276 | 907 | unsigned long start, unsigned long last, |
541c341d | 908 | struct mm_struct *mm, uint32_t trigger) |
1a3b2b5d | 909 | { |
a546a276 XC |
910 | if (!prange->actual_loc || prange->actual_loc == best_loc) |
911 | return svm_migrate_ram_to_vram(prange, best_loc, start, last, | |
912 | mm, trigger); | |
913 | ||
1a3b2b5d | 914 | else |
a546a276 XC |
915 | return svm_migrate_vram_to_vram(prange, best_loc, start, last, |
916 | mm, trigger); | |
1a3b2b5d FK |
917 | |
918 | } | |
919 | ||
814ab993 PY |
920 | /** |
921 | * svm_migrate_to_ram - CPU page fault handler | |
922 | * @vmf: CPU vm fault vma, address | |
923 | * | |
48ff079b | 924 | * Context: vm fault handler, caller holds the mmap read lock |
814ab993 PY |
925 | * |
926 | * Return: | |
927 | * 0 - OK | |
928 | * VM_FAULT_SIGBUS - notice application to have SIGBUS page fault | |
929 | */ | |
930 | static vm_fault_t svm_migrate_to_ram(struct vm_fault *vmf) | |
931 | { | |
a546a276 | 932 | unsigned long start, last, size; |
48ff079b | 933 | unsigned long addr = vmf->address; |
e1f84eef | 934 | struct svm_range_bo *svm_bo; |
48ff079b FK |
935 | struct svm_range *prange; |
936 | struct kfd_process *p; | |
937 | struct mm_struct *mm; | |
938 | int r = 0; | |
939 | ||
e1f84eef PY |
940 | svm_bo = vmf->page->zone_device_data; |
941 | if (!svm_bo) { | |
942 | pr_debug("failed get device page at addr 0x%lx\n", addr); | |
943 | return VM_FAULT_SIGBUS; | |
944 | } | |
945 | if (!mmget_not_zero(svm_bo->eviction_fence->mm)) { | |
e6a7746e | 946 | pr_debug("addr 0x%lx of process mm is destroyed\n", addr); |
e1f84eef PY |
947 | return VM_FAULT_SIGBUS; |
948 | } | |
949 | ||
950 | mm = svm_bo->eviction_fence->mm; | |
951 | if (mm != vmf->vma->vm_mm) | |
952 | pr_debug("addr 0x%lx is COW mapping in child process\n", addr); | |
48ff079b | 953 | |
e1f84eef | 954 | p = kfd_lookup_process_by_mm(mm); |
48ff079b FK |
955 | if (!p) { |
956 | pr_debug("failed find process at fault address 0x%lx\n", addr); | |
e1f84eef PY |
957 | r = VM_FAULT_SIGBUS; |
958 | goto out_mmput; | |
48ff079b | 959 | } |
a6283010 AS |
960 | if (READ_ONCE(p->svms.faulting_task) == current) { |
961 | pr_debug("skipping ram migration\n"); | |
e1f84eef PY |
962 | r = 0; |
963 | goto out_unref_process; | |
a6283010 | 964 | } |
e1f84eef | 965 | |
48ff079b | 966 | pr_debug("CPU page fault svms 0x%p address 0x%lx\n", &p->svms, addr); |
e1f84eef | 967 | addr >>= PAGE_SHIFT; |
48ff079b FK |
968 | |
969 | mutex_lock(&p->svms.lock); | |
970 | ||
a546a276 | 971 | prange = svm_range_from_addr(&p->svms, addr, NULL); |
48ff079b | 972 | if (!prange) { |
e1f84eef | 973 | pr_debug("failed get range svms 0x%p addr 0x%lx\n", &p->svms, addr); |
48ff079b | 974 | r = -EFAULT; |
e1f84eef | 975 | goto out_unlock_svms; |
48ff079b FK |
976 | } |
977 | ||
a546a276 | 978 | mutex_lock(&prange->migrate_mutex); |
48ff079b FK |
979 | |
980 | if (!prange->actual_loc) | |
981 | goto out_unlock_prange; | |
982 | ||
a546a276 XC |
983 | /* Align migration range start and size to granularity size */ |
984 | size = 1UL << prange->granularity; | |
985 | start = max(ALIGN_DOWN(addr, size), prange->start); | |
986 | last = min(ALIGN(addr + 1, size) - 1, prange->last); | |
48ff079b | 987 | |
a546a276 XC |
988 | r = svm_migrate_vram_to_ram(prange, vmf->vma->vm_mm, start, last, |
989 | KFD_MIGRATE_TRIGGER_PAGEFAULT_CPU, vmf->page); | |
48ff079b | 990 | if (r) |
e1f84eef | 991 | pr_debug("failed %d migrate svms 0x%p range 0x%p [0x%lx 0x%lx]\n", |
a546a276 | 992 | r, prange->svms, prange, start, last); |
48ff079b FK |
993 | |
994 | out_unlock_prange: | |
a546a276 | 995 | mutex_unlock(&prange->migrate_mutex); |
e1f84eef | 996 | out_unlock_svms: |
48ff079b | 997 | mutex_unlock(&p->svms.lock); |
e1f84eef | 998 | out_unref_process: |
9682069a | 999 | pr_debug("CPU fault svms 0x%p address 0x%lx done\n", &p->svms, addr); |
48ff079b | 1000 | kfd_unref_process(p); |
e1f84eef PY |
1001 | out_mmput: |
1002 | mmput(mm); | |
48ff079b | 1003 | return r ? VM_FAULT_SIGBUS : 0; |
814ab993 PY |
1004 | } |
1005 | ||
1006 | static const struct dev_pagemap_ops svm_migrate_pgmap_ops = { | |
1007 | .page_free = svm_migrate_page_free, | |
1008 | .migrate_to_ram = svm_migrate_to_ram, | |
1009 | }; | |
1010 | ||
c46ebb6a PY |
1011 | /* Each VRAM page uses sizeof(struct page) on system memory */ |
1012 | #define SVM_HMM_PAGE_STRUCT_SIZE(size) ((size)/PAGE_SIZE * sizeof(struct page)) | |
1013 | ||
84b4dd3f | 1014 | int kgd2kfd_init_zone_device(struct amdgpu_device *adev) |
814ab993 | 1015 | { |
610dab11 | 1016 | struct amdgpu_kfd_dev *kfddev = &adev->kfd; |
814ab993 | 1017 | struct dev_pagemap *pgmap; |
c83dee9b | 1018 | struct resource *res = NULL; |
814ab993 PY |
1019 | unsigned long size; |
1020 | void *r; | |
1021 | ||
84b4dd3f | 1022 | /* Page migration works on gfx9 or newer */ |
4e8303cf | 1023 | if (amdgpu_ip_version(adev, GC_HWIP, 0) < IP_VERSION(9, 0, 1)) |
814ab993 PY |
1024 | return -EINVAL; |
1025 | ||
1f327dfc | 1026 | if (adev->flags & AMD_IS_APU) |
25f50704 PY |
1027 | return 0; |
1028 | ||
814ab993 PY |
1029 | pgmap = &kfddev->pgmap; |
1030 | memset(pgmap, 0, sizeof(*pgmap)); | |
1031 | ||
1032 | /* TODO: register all vram to HMM for now. | |
1033 | * should remove reserved size | |
1034 | */ | |
1035 | size = ALIGN(adev->gmc.real_vram_size, 2ULL << 20); | |
c83dee9b AS |
1036 | if (adev->gmc.xgmi.connected_to_cpu) { |
1037 | pgmap->range.start = adev->gmc.aper_base; | |
1038 | pgmap->range.end = adev->gmc.aper_base + adev->gmc.aper_size - 1; | |
1039 | pgmap->type = MEMORY_DEVICE_COHERENT; | |
1040 | } else { | |
1041 | res = devm_request_free_mem_region(adev->dev, &iomem_resource, size); | |
1042 | if (IS_ERR(res)) | |
02eed83a | 1043 | return PTR_ERR(res); |
c83dee9b AS |
1044 | pgmap->range.start = res->start; |
1045 | pgmap->range.end = res->end; | |
1046 | pgmap->type = MEMORY_DEVICE_PRIVATE; | |
1047 | } | |
814ab993 | 1048 | |
814ab993 | 1049 | pgmap->nr_range = 1; |
814ab993 | 1050 | pgmap->ops = &svm_migrate_pgmap_ops; |
3a61dae8 | 1051 | pgmap->owner = SVM_ADEV_PGMAP_OWNER(adev); |
c83dee9b | 1052 | pgmap->flags = 0; |
22f4f4fa PY |
1053 | /* Device manager releases device-specific resources, memory region and |
1054 | * pgmap when driver disconnects from device. | |
1055 | */ | |
814ab993 PY |
1056 | r = devm_memremap_pages(adev->dev, pgmap); |
1057 | if (IS_ERR(r)) { | |
1058 | pr_err("failed to register HMM device memory\n"); | |
c83dee9b | 1059 | if (pgmap->type == MEMORY_DEVICE_PRIVATE) |
9d086e0d | 1060 | devm_release_mem_region(adev->dev, res->start, resource_size(res)); |
02eed83a DH |
1061 | /* Disable SVM support capability */ |
1062 | pgmap->type = 0; | |
814ab993 PY |
1063 | return PTR_ERR(r); |
1064 | } | |
1065 | ||
c46ebb6a PY |
1066 | pr_debug("reserve %ldMB system memory for VRAM pages struct\n", |
1067 | SVM_HMM_PAGE_STRUCT_SIZE(size) >> 20); | |
1068 | ||
1069 | amdgpu_amdkfd_reserve_system_mem(SVM_HMM_PAGE_STRUCT_SIZE(size)); | |
1070 | ||
814ab993 PY |
1071 | pr_info("HMM registered %ldMB device memory\n", size >> 20); |
1072 | ||
1073 | return 0; | |
1074 | } |