2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
24 * Authors: Dave Airlie
29 #include <drm/radeon_drm.h>
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.
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.
49 * This file handles the common internal GART management.
53 * Common GART table functions.
56 * radeon_gart_table_ram_alloc - allocate system ram for gart page table
58 * @rdev: radeon_device pointer
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.
65 int radeon_gart_table_ram_alloc(struct radeon_device *rdev)
69 ptr = pci_alloc_consistent(rdev->pdev, rdev->gart.table_size,
70 &rdev->gart.table_addr);
75 if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
76 rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
77 set_memory_uc((unsigned long)ptr,
78 rdev->gart.table_size >> PAGE_SHIFT);
82 memset((void *)rdev->gart.ptr, 0, rdev->gart.table_size);
87 * radeon_gart_table_ram_free - free system ram for gart page table
89 * @rdev: radeon_device pointer
91 * Free system memory for GART page table
92 * (r1xx-r3xx, non-pcie r4xx, rs400). These asics require the
93 * gart table to be in system memory.
95 void radeon_gart_table_ram_free(struct radeon_device *rdev)
97 if (rdev->gart.ptr == NULL) {
101 if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
102 rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
103 set_memory_wb((unsigned long)rdev->gart.ptr,
104 rdev->gart.table_size >> PAGE_SHIFT);
107 pci_free_consistent(rdev->pdev, rdev->gart.table_size,
108 (void *)rdev->gart.ptr,
109 rdev->gart.table_addr);
110 rdev->gart.ptr = NULL;
111 rdev->gart.table_addr = 0;
115 * radeon_gart_table_vram_alloc - allocate vram for gart page table
117 * @rdev: radeon_device pointer
119 * Allocate video memory for GART page table
120 * (pcie r4xx, r5xx+). These asics require the
121 * gart table to be in video memory.
122 * Returns 0 for success, error for failure.
124 int radeon_gart_table_vram_alloc(struct radeon_device *rdev)
128 if (rdev->gart.robj == NULL) {
129 r = radeon_bo_create(rdev, rdev->gart.table_size,
130 PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM,
131 0, NULL, NULL, &rdev->gart.robj);
140 * radeon_gart_table_vram_pin - pin gart page table in vram
142 * @rdev: radeon_device pointer
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.
149 int radeon_gart_table_vram_pin(struct radeon_device *rdev)
154 r = radeon_bo_reserve(rdev->gart.robj, false);
155 if (unlikely(r != 0))
157 r = radeon_bo_pin(rdev->gart.robj,
158 RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
160 radeon_bo_unreserve(rdev->gart.robj);
163 r = radeon_bo_kmap(rdev->gart.robj, &rdev->gart.ptr);
165 radeon_bo_unpin(rdev->gart.robj);
166 radeon_bo_unreserve(rdev->gart.robj);
167 rdev->gart.table_addr = gpu_addr;
172 /* We might have dropped some GART table updates while it wasn't
173 * mapped, restore all entries
175 for (i = 0; i < rdev->gart.num_gpu_pages; i++)
176 radeon_gart_set_page(rdev, i, rdev->gart.pages_entry[i]);
178 radeon_gart_tlb_flush(rdev);
185 * radeon_gart_table_vram_unpin - unpin gart page table in vram
187 * @rdev: radeon_device pointer
189 * Unpin the GART page table in vram (pcie r4xx, r5xx+).
190 * These asics require the gart table to be in video memory.
192 void radeon_gart_table_vram_unpin(struct radeon_device *rdev)
196 if (rdev->gart.robj == NULL) {
199 r = radeon_bo_reserve(rdev->gart.robj, false);
200 if (likely(r == 0)) {
201 radeon_bo_kunmap(rdev->gart.robj);
202 radeon_bo_unpin(rdev->gart.robj);
203 radeon_bo_unreserve(rdev->gart.robj);
204 rdev->gart.ptr = NULL;
209 * radeon_gart_table_vram_free - free gart page table vram
211 * @rdev: radeon_device pointer
213 * Free the video memory used for the GART page table
214 * (pcie r4xx, r5xx+). These asics require the gart table to
215 * be in video memory.
217 void radeon_gart_table_vram_free(struct radeon_device *rdev)
219 if (rdev->gart.robj == NULL) {
222 radeon_bo_unref(&rdev->gart.robj);
226 * Common gart functions.
229 * radeon_gart_unbind - unbind pages from the gart page table
231 * @rdev: radeon_device pointer
232 * @offset: offset into the GPU's gart aperture
233 * @pages: number of pages to unbind
235 * Unbinds the requested pages from the gart page table and
236 * replaces them with the dummy page (all asics).
238 void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
245 if (!rdev->gart.ready) {
246 WARN(1, "trying to unbind memory from uninitialized GART !\n");
249 t = offset / RADEON_GPU_PAGE_SIZE;
250 p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
251 for (i = 0; i < pages; i++, p++) {
252 if (rdev->gart.pages[p]) {
253 rdev->gart.pages[p] = NULL;
254 for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
255 rdev->gart.pages_entry[t] = rdev->dummy_page.entry;
256 if (rdev->gart.ptr) {
257 radeon_gart_set_page(rdev, t,
258 rdev->dummy_page.entry);
263 if (rdev->gart.ptr) {
265 radeon_gart_tlb_flush(rdev);
270 * radeon_gart_bind - bind pages into the gart page table
272 * @rdev: radeon_device pointer
273 * @offset: offset into the GPU's gart aperture
274 * @pages: number of pages to bind
275 * @pagelist: pages to bind
276 * @dma_addr: DMA addresses of pages
277 * @flags: RADEON_GART_PAGE_* flags
279 * Binds the requested pages to the gart page table
281 * Returns 0 for success, -EINVAL for failure.
283 int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
284 int pages, struct page **pagelist, dma_addr_t *dma_addr,
289 uint64_t page_base, page_entry;
292 if (!rdev->gart.ready) {
293 WARN(1, "trying to bind memory to uninitialized GART !\n");
296 t = offset / RADEON_GPU_PAGE_SIZE;
297 p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
299 for (i = 0; i < pages; i++, p++) {
300 rdev->gart.pages[p] = pagelist[i];
301 page_base = dma_addr[i];
302 for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
303 page_entry = radeon_gart_get_page_entry(page_base, flags);
304 rdev->gart.pages_entry[t] = page_entry;
305 if (rdev->gart.ptr) {
306 radeon_gart_set_page(rdev, t, page_entry);
308 page_base += RADEON_GPU_PAGE_SIZE;
311 if (rdev->gart.ptr) {
313 radeon_gart_tlb_flush(rdev);
319 * radeon_gart_init - init the driver info for managing the gart
321 * @rdev: radeon_device pointer
323 * Allocate the dummy page and init the gart driver info (all asics).
324 * Returns 0 for success, error for failure.
326 int radeon_gart_init(struct radeon_device *rdev)
330 if (rdev->gart.pages) {
333 /* We need PAGE_SIZE >= RADEON_GPU_PAGE_SIZE */
334 if (PAGE_SIZE < RADEON_GPU_PAGE_SIZE) {
335 DRM_ERROR("Page size is smaller than GPU page size!\n");
338 r = radeon_dummy_page_init(rdev);
341 /* Compute table size */
342 rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
343 rdev->gart.num_gpu_pages = rdev->mc.gtt_size / RADEON_GPU_PAGE_SIZE;
344 DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
345 rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
346 /* Allocate pages table */
347 rdev->gart.pages = vzalloc(sizeof(void *) * rdev->gart.num_cpu_pages);
348 if (rdev->gart.pages == NULL) {
349 radeon_gart_fini(rdev);
352 rdev->gart.pages_entry = vmalloc(sizeof(uint64_t) *
353 rdev->gart.num_gpu_pages);
354 if (rdev->gart.pages_entry == NULL) {
355 radeon_gart_fini(rdev);
358 /* set GART entry to point to the dummy page by default */
359 for (i = 0; i < rdev->gart.num_gpu_pages; i++)
360 rdev->gart.pages_entry[i] = rdev->dummy_page.entry;
365 * radeon_gart_fini - tear down the driver info for managing the gart
367 * @rdev: radeon_device pointer
369 * Tear down the gart driver info and free the dummy page (all asics).
371 void radeon_gart_fini(struct radeon_device *rdev)
373 if (rdev->gart.ready) {
375 radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
377 rdev->gart.ready = false;
378 vfree(rdev->gart.pages);
379 vfree(rdev->gart.pages_entry);
380 rdev->gart.pages = NULL;
381 rdev->gart.pages_entry = NULL;
383 radeon_dummy_page_fini(rdev);