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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/amdgpu_drm.h>
30#include "amdgpu.h"
31
32/*
33 * GART
34 * The GART (Graphics Aperture Remapping Table) is an aperture
35 * in the GPU's address space. System pages can be mapped into
36 * the aperture and look like contiguous pages from the GPU's
37 * perspective. A page table maps the pages in the aperture
38 * to the actual backing pages in system memory.
39 *
40 * Radeon GPUs support both an internal GART, as described above,
41 * and AGP. AGP works similarly, but the GART table is configured
42 * and maintained by the northbridge rather than the driver.
43 * Radeon hw has a separate AGP aperture that is programmed to
44 * point to the AGP aperture provided by the northbridge and the
45 * requests are passed through to the northbridge aperture.
46 * Both AGP and internal GART can be used at the same time, however
47 * that is not currently supported by the driver.
48 *
49 * This file handles the common internal GART management.
50 */
51
52/*
53 * Common GART table functions.
54 */
55/**
56 * amdgpu_gart_table_ram_alloc - allocate system ram for gart page table
57 *
58 * @adev: amdgpu_device pointer
59 *
60 * Allocate system memory for GART page table
61 * (r1xx-r3xx, non-pcie r4xx, rs400). These asics require the
62 * gart table to be in system memory.
63 * Returns 0 for success, -ENOMEM for failure.
64 */
65int amdgpu_gart_table_ram_alloc(struct amdgpu_device *adev)
66{
67 void *ptr;
68
69 ptr = pci_alloc_consistent(adev->pdev, adev->gart.table_size,
70 &adev->gart.table_addr);
71 if (ptr == NULL) {
72 return -ENOMEM;
73 }
74#ifdef CONFIG_X86
75 if (0) {
76 set_memory_uc((unsigned long)ptr,
77 adev->gart.table_size >> PAGE_SHIFT);
78 }
79#endif
80 adev->gart.ptr = ptr;
81 memset((void *)adev->gart.ptr, 0, adev->gart.table_size);
82 return 0;
83}
84
85/**
86 * amdgpu_gart_table_ram_free - free system ram for gart page table
87 *
88 * @adev: amdgpu_device pointer
89 *
90 * Free system memory for GART page table
91 * (r1xx-r3xx, non-pcie r4xx, rs400). These asics require the
92 * gart table to be in system memory.
93 */
94void amdgpu_gart_table_ram_free(struct amdgpu_device *adev)
95{
96 if (adev->gart.ptr == NULL) {
97 return;
98 }
99#ifdef CONFIG_X86
100 if (0) {
101 set_memory_wb((unsigned long)adev->gart.ptr,
102 adev->gart.table_size >> PAGE_SHIFT);
103 }
104#endif
105 pci_free_consistent(adev->pdev, adev->gart.table_size,
106 (void *)adev->gart.ptr,
107 adev->gart.table_addr);
108 adev->gart.ptr = NULL;
109 adev->gart.table_addr = 0;
110}
111
112/**
113 * amdgpu_gart_table_vram_alloc - allocate vram for gart page table
114 *
115 * @adev: amdgpu_device pointer
116 *
117 * Allocate video memory for GART page table
118 * (pcie r4xx, r5xx+). These asics require the
119 * gart table to be in video memory.
120 * Returns 0 for success, error for failure.
121 */
122int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev)
123{
124 int r;
125
126 if (adev->gart.robj == NULL) {
127 r = amdgpu_bo_create(adev, adev->gart.table_size,
128 PAGE_SIZE, true, AMDGPU_GEM_DOMAIN_VRAM,
129 AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
130 NULL, NULL, &adev->gart.robj);
131 if (r) {
132 return r;
133 }
134 }
135 return 0;
136}
137
138/**
139 * amdgpu_gart_table_vram_pin - pin gart page table in vram
140 *
141 * @adev: amdgpu_device pointer
142 *
143 * Pin the GART page table in vram so it will not be moved
144 * by the memory manager (pcie r4xx, r5xx+). These asics require the
145 * gart table to be in video memory.
146 * Returns 0 for success, error for failure.
147 */
148int amdgpu_gart_table_vram_pin(struct amdgpu_device *adev)
149{
150 uint64_t gpu_addr;
151 int r;
152
153 r = amdgpu_bo_reserve(adev->gart.robj, false);
154 if (unlikely(r != 0))
155 return r;
156 r = amdgpu_bo_pin(adev->gart.robj,
157 AMDGPU_GEM_DOMAIN_VRAM, &gpu_addr);
158 if (r) {
159 amdgpu_bo_unreserve(adev->gart.robj);
160 return r;
161 }
162 r = amdgpu_bo_kmap(adev->gart.robj, &adev->gart.ptr);
163 if (r)
164 amdgpu_bo_unpin(adev->gart.robj);
165 amdgpu_bo_unreserve(adev->gart.robj);
166 adev->gart.table_addr = gpu_addr;
167 return r;
168}
169
170/**
171 * amdgpu_gart_table_vram_unpin - unpin gart page table in vram
172 *
173 * @adev: amdgpu_device pointer
174 *
175 * Unpin the GART page table in vram (pcie r4xx, r5xx+).
176 * These asics require the gart table to be in video memory.
177 */
178void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev)
179{
180 int r;
181
182 if (adev->gart.robj == NULL) {
183 return;
184 }
185 r = amdgpu_bo_reserve(adev->gart.robj, false);
186 if (likely(r == 0)) {
187 amdgpu_bo_kunmap(adev->gart.robj);
188 amdgpu_bo_unpin(adev->gart.robj);
189 amdgpu_bo_unreserve(adev->gart.robj);
190 adev->gart.ptr = NULL;
191 }
192}
193
194/**
195 * amdgpu_gart_table_vram_free - free gart page table vram
196 *
197 * @adev: amdgpu_device pointer
198 *
199 * Free the video memory used for the GART page table
200 * (pcie r4xx, r5xx+). These asics require the gart table to
201 * be in video memory.
202 */
203void amdgpu_gart_table_vram_free(struct amdgpu_device *adev)
204{
205 if (adev->gart.robj == NULL) {
206 return;
207 }
208 amdgpu_bo_unref(&adev->gart.robj);
209}
210
211/*
212 * Common gart functions.
213 */
214/**
215 * amdgpu_gart_unbind - unbind pages from the gart page table
216 *
217 * @adev: amdgpu_device pointer
218 * @offset: offset into the GPU's gart aperture
219 * @pages: number of pages to unbind
220 *
221 * Unbinds the requested pages from the gart page table and
222 * replaces them with the dummy page (all asics).
223 */
224void amdgpu_gart_unbind(struct amdgpu_device *adev, unsigned offset,
225 int pages)
226{
227 unsigned t;
228 unsigned p;
229 int i, j;
230 u64 page_base;
231 uint32_t flags = AMDGPU_PTE_SYSTEM;
232
233 if (!adev->gart.ready) {
234 WARN(1, "trying to unbind memory from uninitialized GART !\n");
235 return;
236 }
237
238 t = offset / AMDGPU_GPU_PAGE_SIZE;
239 p = t / (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
240 for (i = 0; i < pages; i++, p++) {
241 if (adev->gart.pages[p]) {
242 adev->gart.pages[p] = NULL;
243 adev->gart.pages_addr[p] = adev->dummy_page.addr;
244 page_base = adev->gart.pages_addr[p];
245 if (!adev->gart.ptr)
246 continue;
247
248 for (j = 0; j < (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE); j++, t++) {
249 amdgpu_gart_set_pte_pde(adev, adev->gart.ptr,
250 t, page_base, flags);
251 page_base += AMDGPU_GPU_PAGE_SIZE;
252 }
253 }
254 }
255 mb();
256 amdgpu_gart_flush_gpu_tlb(adev, 0);
257}
258
259/**
260 * amdgpu_gart_bind - bind pages into the gart page table
261 *
262 * @adev: amdgpu_device pointer
263 * @offset: offset into the GPU's gart aperture
264 * @pages: number of pages to bind
265 * @pagelist: pages to bind
266 * @dma_addr: DMA addresses of pages
267 *
268 * Binds the requested pages to the gart page table
269 * (all asics).
270 * Returns 0 for success, -EINVAL for failure.
271 */
272int amdgpu_gart_bind(struct amdgpu_device *adev, unsigned offset,
273 int pages, struct page **pagelist, dma_addr_t *dma_addr,
274 uint32_t flags)
275{
276 unsigned t;
277 unsigned p;
278 uint64_t page_base;
279 int i, j;
280
281 if (!adev->gart.ready) {
282 WARN(1, "trying to bind memory to uninitialized GART !\n");
283 return -EINVAL;
284 }
285
286 t = offset / AMDGPU_GPU_PAGE_SIZE;
287 p = t / (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
288
289 for (i = 0; i < pages; i++, p++) {
290 adev->gart.pages_addr[p] = dma_addr[i];
291 adev->gart.pages[p] = pagelist[i];
292 if (adev->gart.ptr) {
293 page_base = adev->gart.pages_addr[p];
294 for (j = 0; j < (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE); j++, t++) {
295 amdgpu_gart_set_pte_pde(adev, adev->gart.ptr, t, page_base, flags);
296 page_base += AMDGPU_GPU_PAGE_SIZE;
297 }
298 }
299 }
300 mb();
301 amdgpu_gart_flush_gpu_tlb(adev, 0);
302 return 0;
303}
304
305/**
306 * amdgpu_gart_init - init the driver info for managing the gart
307 *
308 * @adev: amdgpu_device pointer
309 *
310 * Allocate the dummy page and init the gart driver info (all asics).
311 * Returns 0 for success, error for failure.
312 */
313int amdgpu_gart_init(struct amdgpu_device *adev)
314{
315 int r, i;
316
317 if (adev->gart.pages) {
318 return 0;
319 }
320 /* We need PAGE_SIZE >= AMDGPU_GPU_PAGE_SIZE */
321 if (PAGE_SIZE < AMDGPU_GPU_PAGE_SIZE) {
322 DRM_ERROR("Page size is smaller than GPU page size!\n");
323 return -EINVAL;
324 }
325 r = amdgpu_dummy_page_init(adev);
326 if (r)
327 return r;
328 /* Compute table size */
329 adev->gart.num_cpu_pages = adev->mc.gtt_size / PAGE_SIZE;
330 adev->gart.num_gpu_pages = adev->mc.gtt_size / AMDGPU_GPU_PAGE_SIZE;
331 DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
332 adev->gart.num_cpu_pages, adev->gart.num_gpu_pages);
333 /* Allocate pages table */
334 adev->gart.pages = vzalloc(sizeof(void *) * adev->gart.num_cpu_pages);
335 if (adev->gart.pages == NULL) {
336 amdgpu_gart_fini(adev);
337 return -ENOMEM;
338 }
339 adev->gart.pages_addr = vzalloc(sizeof(dma_addr_t) *
340 adev->gart.num_cpu_pages);
341 if (adev->gart.pages_addr == NULL) {
342 amdgpu_gart_fini(adev);
343 return -ENOMEM;
344 }
345 /* set GART entry to point to the dummy page by default */
346 for (i = 0; i < adev->gart.num_cpu_pages; i++) {
347 adev->gart.pages_addr[i] = adev->dummy_page.addr;
348 }
349 return 0;
350}
351
352/**
353 * amdgpu_gart_fini - tear down the driver info for managing the gart
354 *
355 * @adev: amdgpu_device pointer
356 *
357 * Tear down the gart driver info and free the dummy page (all asics).
358 */
359void amdgpu_gart_fini(struct amdgpu_device *adev)
360{
361 if (adev->gart.pages && adev->gart.pages_addr && adev->gart.ready) {
362 /* unbind pages */
363 amdgpu_gart_unbind(adev, 0, adev->gart.num_cpu_pages);
364 }
365 adev->gart.ready = false;
366 vfree(adev->gart.pages);
367 vfree(adev->gart.pages_addr);
368 adev->gart.pages = NULL;
369 adev->gart.pages_addr = NULL;
370
371 amdgpu_dummy_page_fini(adev);
372}
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/amdgpu_drm.h>
30#include "amdgpu.h"
31
32/*
33 * GART
34 * The GART (Graphics Aperture Remapping Table) is an aperture
35 * in the GPU's address space. System pages can be mapped into
36 * the aperture and look like contiguous pages from the GPU's
37 * perspective. A page table maps the pages in the aperture
38 * to the actual backing pages in system memory.
39 *
40 * Radeon GPUs support both an internal GART, as described above,
41 * and AGP. AGP works similarly, but the GART table is configured
42 * and maintained by the northbridge rather than the driver.
43 * Radeon hw has a separate AGP aperture that is programmed to
44 * point to the AGP aperture provided by the northbridge and the
45 * requests are passed through to the northbridge aperture.
46 * Both AGP and internal GART can be used at the same time, however
47 * that is not currently supported by the driver.
48 *
49 * This file handles the common internal GART management.
50 */
51
52/*
53 * Common GART table functions.
54 */
55/**
56 * amdgpu_gart_table_ram_alloc - allocate system ram for gart page table
57 *
58 * @adev: amdgpu_device pointer
59 *
60 * Allocate system memory for GART page table
61 * (r1xx-r3xx, non-pcie r4xx, rs400). These asics require the
62 * gart table to be in system memory.
63 * Returns 0 for success, -ENOMEM for failure.
64 */
65int amdgpu_gart_table_ram_alloc(struct amdgpu_device *adev)
66{
67 void *ptr;
68
69 ptr = pci_alloc_consistent(adev->pdev, adev->gart.table_size,
70 &adev->gart.table_addr);
71 if (ptr == NULL) {
72 return -ENOMEM;
73 }
74#ifdef CONFIG_X86
75 if (0) {
76 set_memory_uc((unsigned long)ptr,
77 adev->gart.table_size >> PAGE_SHIFT);
78 }
79#endif
80 adev->gart.ptr = ptr;
81 memset((void *)adev->gart.ptr, 0, adev->gart.table_size);
82 return 0;
83}
84
85/**
86 * amdgpu_gart_table_ram_free - free system ram for gart page table
87 *
88 * @adev: amdgpu_device pointer
89 *
90 * Free system memory for GART page table
91 * (r1xx-r3xx, non-pcie r4xx, rs400). These asics require the
92 * gart table to be in system memory.
93 */
94void amdgpu_gart_table_ram_free(struct amdgpu_device *adev)
95{
96 if (adev->gart.ptr == NULL) {
97 return;
98 }
99#ifdef CONFIG_X86
100 if (0) {
101 set_memory_wb((unsigned long)adev->gart.ptr,
102 adev->gart.table_size >> PAGE_SHIFT);
103 }
104#endif
105 pci_free_consistent(adev->pdev, adev->gart.table_size,
106 (void *)adev->gart.ptr,
107 adev->gart.table_addr);
108 adev->gart.ptr = NULL;
109 adev->gart.table_addr = 0;
110}
111
112/**
113 * amdgpu_gart_table_vram_alloc - allocate vram for gart page table
114 *
115 * @adev: amdgpu_device pointer
116 *
117 * Allocate video memory for GART page table
118 * (pcie r4xx, r5xx+). These asics require the
119 * gart table to be in video memory.
120 * Returns 0 for success, error for failure.
121 */
122int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev)
123{
124 int r;
125
126 if (adev->gart.robj == NULL) {
127 r = amdgpu_bo_create(adev, adev->gart.table_size,
128 PAGE_SIZE, true, AMDGPU_GEM_DOMAIN_VRAM,
129 AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
130 AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS,
131 NULL, NULL, &adev->gart.robj);
132 if (r) {
133 return r;
134 }
135 }
136 return 0;
137}
138
139/**
140 * amdgpu_gart_table_vram_pin - pin gart page table in vram
141 *
142 * @adev: amdgpu_device pointer
143 *
144 * Pin the GART page table in vram so it will not be moved
145 * by the memory manager (pcie r4xx, r5xx+). These asics require the
146 * gart table to be in video memory.
147 * Returns 0 for success, error for failure.
148 */
149int amdgpu_gart_table_vram_pin(struct amdgpu_device *adev)
150{
151 uint64_t gpu_addr;
152 int r;
153
154 r = amdgpu_bo_reserve(adev->gart.robj, false);
155 if (unlikely(r != 0))
156 return r;
157 r = amdgpu_bo_pin(adev->gart.robj,
158 AMDGPU_GEM_DOMAIN_VRAM, &gpu_addr);
159 if (r) {
160 amdgpu_bo_unreserve(adev->gart.robj);
161 return r;
162 }
163 r = amdgpu_bo_kmap(adev->gart.robj, &adev->gart.ptr);
164 if (r)
165 amdgpu_bo_unpin(adev->gart.robj);
166 amdgpu_bo_unreserve(adev->gart.robj);
167 adev->gart.table_addr = gpu_addr;
168 return r;
169}
170
171/**
172 * amdgpu_gart_table_vram_unpin - unpin gart page table in vram
173 *
174 * @adev: amdgpu_device pointer
175 *
176 * Unpin the GART page table in vram (pcie r4xx, r5xx+).
177 * These asics require the gart table to be in video memory.
178 */
179void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev)
180{
181 int r;
182
183 if (adev->gart.robj == NULL) {
184 return;
185 }
186 r = amdgpu_bo_reserve(adev->gart.robj, false);
187 if (likely(r == 0)) {
188 amdgpu_bo_kunmap(adev->gart.robj);
189 amdgpu_bo_unpin(adev->gart.robj);
190 amdgpu_bo_unreserve(adev->gart.robj);
191 adev->gart.ptr = NULL;
192 }
193}
194
195/**
196 * amdgpu_gart_table_vram_free - free gart page table vram
197 *
198 * @adev: amdgpu_device pointer
199 *
200 * Free the video memory used for the GART page table
201 * (pcie r4xx, r5xx+). These asics require the gart table to
202 * be in video memory.
203 */
204void amdgpu_gart_table_vram_free(struct amdgpu_device *adev)
205{
206 if (adev->gart.robj == NULL) {
207 return;
208 }
209 amdgpu_bo_unref(&adev->gart.robj);
210}
211
212/*
213 * Common gart functions.
214 */
215/**
216 * amdgpu_gart_unbind - unbind pages from the gart page table
217 *
218 * @adev: amdgpu_device pointer
219 * @offset: offset into the GPU's gart aperture
220 * @pages: number of pages to unbind
221 *
222 * Unbinds the requested pages from the gart page table and
223 * replaces them with the dummy page (all asics).
224 */
225void amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
226 int pages)
227{
228 unsigned t;
229 unsigned p;
230 int i, j;
231 u64 page_base;
232 uint32_t flags = AMDGPU_PTE_SYSTEM;
233
234 if (!adev->gart.ready) {
235 WARN(1, "trying to unbind memory from uninitialized GART !\n");
236 return;
237 }
238
239 t = offset / AMDGPU_GPU_PAGE_SIZE;
240 p = t / (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
241 for (i = 0; i < pages; i++, p++) {
242#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
243 adev->gart.pages[p] = NULL;
244#endif
245 page_base = adev->dummy_page.addr;
246 if (!adev->gart.ptr)
247 continue;
248
249 for (j = 0; j < (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE); j++, t++) {
250 amdgpu_gart_set_pte_pde(adev, adev->gart.ptr,
251 t, page_base, flags);
252 page_base += AMDGPU_GPU_PAGE_SIZE;
253 }
254 }
255 mb();
256 amdgpu_gart_flush_gpu_tlb(adev, 0);
257}
258
259/**
260 * amdgpu_gart_bind - bind pages into the gart page table
261 *
262 * @adev: amdgpu_device pointer
263 * @offset: offset into the GPU's gart aperture
264 * @pages: number of pages to bind
265 * @pagelist: pages to bind
266 * @dma_addr: DMA addresses of pages
267 *
268 * Binds the requested pages to the gart page table
269 * (all asics).
270 * Returns 0 for success, -EINVAL for failure.
271 */
272int amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset,
273 int pages, struct page **pagelist, dma_addr_t *dma_addr,
274 uint32_t flags)
275{
276 unsigned t;
277 unsigned p;
278 uint64_t page_base;
279 int i, j;
280
281 if (!adev->gart.ready) {
282 WARN(1, "trying to bind memory to uninitialized GART !\n");
283 return -EINVAL;
284 }
285
286 t = offset / AMDGPU_GPU_PAGE_SIZE;
287 p = t / (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE);
288
289 for (i = 0; i < pages; i++, p++) {
290#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
291 adev->gart.pages[p] = pagelist[i];
292#endif
293 if (adev->gart.ptr) {
294 page_base = dma_addr[i];
295 for (j = 0; j < (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE); j++, t++) {
296 amdgpu_gart_set_pte_pde(adev, adev->gart.ptr, t, page_base, flags);
297 page_base += AMDGPU_GPU_PAGE_SIZE;
298 }
299 }
300 }
301 mb();
302 amdgpu_gart_flush_gpu_tlb(adev, 0);
303 return 0;
304}
305
306/**
307 * amdgpu_gart_init - init the driver info for managing the gart
308 *
309 * @adev: amdgpu_device pointer
310 *
311 * Allocate the dummy page and init the gart driver info (all asics).
312 * Returns 0 for success, error for failure.
313 */
314int amdgpu_gart_init(struct amdgpu_device *adev)
315{
316 int r;
317
318 if (adev->dummy_page.page)
319 return 0;
320
321 /* We need PAGE_SIZE >= AMDGPU_GPU_PAGE_SIZE */
322 if (PAGE_SIZE < AMDGPU_GPU_PAGE_SIZE) {
323 DRM_ERROR("Page size is smaller than GPU page size!\n");
324 return -EINVAL;
325 }
326 r = amdgpu_dummy_page_init(adev);
327 if (r)
328 return r;
329 /* Compute table size */
330 adev->gart.num_cpu_pages = adev->mc.gtt_size / PAGE_SIZE;
331 adev->gart.num_gpu_pages = adev->mc.gtt_size / AMDGPU_GPU_PAGE_SIZE;
332 DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
333 adev->gart.num_cpu_pages, adev->gart.num_gpu_pages);
334
335#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
336 /* Allocate pages table */
337 adev->gart.pages = vzalloc(sizeof(void *) * adev->gart.num_cpu_pages);
338 if (adev->gart.pages == NULL) {
339 amdgpu_gart_fini(adev);
340 return -ENOMEM;
341 }
342#endif
343
344 return 0;
345}
346
347/**
348 * amdgpu_gart_fini - tear down the driver info for managing the gart
349 *
350 * @adev: amdgpu_device pointer
351 *
352 * Tear down the gart driver info and free the dummy page (all asics).
353 */
354void amdgpu_gart_fini(struct amdgpu_device *adev)
355{
356 if (adev->gart.ready) {
357 /* unbind pages */
358 amdgpu_gart_unbind(adev, 0, adev->gart.num_cpu_pages);
359 }
360 adev->gart.ready = false;
361#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
362 vfree(adev->gart.pages);
363 adev->gart.pages = NULL;
364#endif
365 amdgpu_dummy_page_fini(adev);
366}