drivers/gpu/drm/radeon/radeon_gart.c

   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 "drmP.h"
  29 #include "radeon_drm.h"
  30 #include "radeon.h"
  31 #include "radeon_reg.h"
  32
  33 /*
  34  * Common GART table functions.
  35  */
  36 int radeon_gart_table_ram_alloc(struct radeon_device *rdev)
  37 {
  38         void *ptr;
  39
  40         ptr = pci_alloc_consistent(rdev->pdev, rdev->gart.table_size,
  41                                    &rdev->gart.table_addr);
  42         if (ptr == NULL) {
  43                 return -ENOMEM;
  44         }
  45 #ifdef CONFIG_X86
  46         if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
  47             rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
  48                 set_memory_uc((unsigned long)ptr,
  49                               rdev->gart.table_size >> PAGE_SHIFT);
  50         }
  51 #endif
  52         rdev->gart.ptr = ptr;
  53         memset((void *)rdev->gart.ptr, 0, rdev->gart.table_size);
  54         return 0;
  55 }
  56
  57 void radeon_gart_table_ram_free(struct radeon_device *rdev)
  58 {
  59         if (rdev->gart.ptr == NULL) {
  60                 return;
  61         }
  62 #ifdef CONFIG_X86
  63         if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
  64             rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
  65                 set_memory_wb((unsigned long)rdev->gart.ptr,
  66                               rdev->gart.table_size >> PAGE_SHIFT);
  67         }
  68 #endif
  69         pci_free_consistent(rdev->pdev, rdev->gart.table_size,
  70                             (void *)rdev->gart.ptr,
  71                             rdev->gart.table_addr);
  72         rdev->gart.ptr = NULL;
  73         rdev->gart.table_addr = 0;
  74 }
  75
  76 int radeon_gart_table_vram_alloc(struct radeon_device *rdev)
  77 {
  78         int r;
  79
  80         if (rdev->gart.robj == NULL) {
  81                 r = radeon_bo_create(rdev, rdev->gart.table_size,
  82                                      PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM,
  83                                      &rdev->gart.robj);
  84                 if (r) {
  85                         return r;
  86                 }
  87         }
  88         return 0;
  89 }
  90
  91 int radeon_gart_table_vram_pin(struct radeon_device *rdev)
  92 {
  93         uint64_t gpu_addr;
  94         int r;
  95
  96         r = radeon_bo_reserve(rdev->gart.robj, false);
  97         if (unlikely(r != 0))
  98                 return r;
  99         r = radeon_bo_pin(rdev->gart.robj,
 100                                 RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
 101         if (r) {
 102                 radeon_bo_unreserve(rdev->gart.robj);
 103                 return r;
 104         }
 105         r = radeon_bo_kmap(rdev->gart.robj, &rdev->gart.ptr);
 106         if (r)
 107                 radeon_bo_unpin(rdev->gart.robj);
 108         radeon_bo_unreserve(rdev->gart.robj);
 109         rdev->gart.table_addr = gpu_addr;
 110         return r;
 111 }
 112
 113 void radeon_gart_table_vram_unpin(struct radeon_device *rdev)
 114 {
 115         int r;
 116
 117         if (rdev->gart.robj == NULL) {
 118                 return;
 119         }
 120         r = radeon_bo_reserve(rdev->gart.robj, false);
 121         if (likely(r == 0)) {
 122                 radeon_bo_kunmap(rdev->gart.robj);
 123                 radeon_bo_unpin(rdev->gart.robj);
 124                 radeon_bo_unreserve(rdev->gart.robj);
 125                 rdev->gart.ptr = NULL;
 126         }
 127 }
 128
 129 void radeon_gart_table_vram_free(struct radeon_device *rdev)
 130 {
 131         if (rdev->gart.robj == NULL) {
 132                 return;
 133         }
 134         radeon_gart_table_vram_unpin(rdev);
 135         radeon_bo_unref(&rdev->gart.robj);
 136 }
 137
 138
 139
 140
 141 /*
 142  * Common gart functions.
 143  */
 144 void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
 145                         int pages)
 146 {
 147         unsigned t;
 148         unsigned p;
 149         int i, j;
 150         u64 page_base;
 151
 152         if (!rdev->gart.ready) {
 153                 WARN(1, "trying to unbind memory from uninitialized GART !\n");
 154                 return;
 155         }
 156         t = offset / RADEON_GPU_PAGE_SIZE;
 157         p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 158         for (i = 0; i < pages; i++, p++) {
 159                 if (rdev->gart.pages[p]) {
 160                         if (!rdev->gart.ttm_alloced[p])
 161                                 pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
 162                                                 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 163                         rdev->gart.pages[p] = NULL;
 164                         rdev->gart.pages_addr[p] = rdev->dummy_page.addr;
 165                         page_base = rdev->gart.pages_addr[p];
 166                         for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 167                                 if (rdev->gart.ptr) {
 168                                         radeon_gart_set_page(rdev, t, page_base);
 169                                 }
 170                                 page_base += RADEON_GPU_PAGE_SIZE;
 171                         }
 172                 }
 173         }
 174         mb();
 175         radeon_gart_tlb_flush(rdev);
 176 }
 177
 178 int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
 179                      int pages, struct page **pagelist, dma_addr_t *dma_addr)
 180 {
 181         unsigned t;
 182         unsigned p;
 183         uint64_t page_base;
 184         int i, j;
 185
 186         if (!rdev->gart.ready) {
 187                 WARN(1, "trying to bind memory to uninitialized GART !\n");
 188                 return -EINVAL;
 189         }
 190         t = offset / RADEON_GPU_PAGE_SIZE;
 191         p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 192
 193         for (i = 0; i < pages; i++, p++) {
 194                 /* we reverted the patch using dma_addr in TTM for now but this
 195                  * code stops building on alpha so just comment it out for now */
 196                 if (0) { /*dma_addr[i] != DMA_ERROR_CODE) */
 197                         rdev->gart.ttm_alloced[p] = true;
 198                         rdev->gart.pages_addr[p] = dma_addr[i];
 199                 } else {
 200                         /* we need to support large memory configurations */
 201                         /* assume that unbind have already been call on the range */
 202                         rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
 203                                                         0, PAGE_SIZE,
 204                                                         PCI_DMA_BIDIRECTIONAL);
 205                         if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
 206                                 /* FIXME: failed to map page (return -ENOMEM?) */
 207                                 radeon_gart_unbind(rdev, offset, pages);
 208                                 return -ENOMEM;
 209                         }
 210                 }
 211                 rdev->gart.pages[p] = pagelist[i];
 212                 if (rdev->gart.ptr) {
 213                         page_base = rdev->gart.pages_addr[p];
 214                         for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 215                                 radeon_gart_set_page(rdev, t, page_base);
 216                                 page_base += RADEON_GPU_PAGE_SIZE;
 217                         }
 218                 }
 219         }
 220         mb();
 221         radeon_gart_tlb_flush(rdev);
 222         return 0;
 223 }
 224
 225 void radeon_gart_restore(struct radeon_device *rdev)
 226 {
 227         int i, j, t;
 228         u64 page_base;
 229
 230         if (!rdev->gart.ptr) {
 231                 return;
 232         }
 233         for (i = 0, t = 0; i < rdev->gart.num_cpu_pages; i++) {
 234                 page_base = rdev->gart.pages_addr[i];
 235                 for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 236                         radeon_gart_set_page(rdev, t, page_base);
 237                         page_base += RADEON_GPU_PAGE_SIZE;
 238                 }
 239         }
 240         mb();
 241         radeon_gart_tlb_flush(rdev);
 242 }
 243
 244 int radeon_gart_init(struct radeon_device *rdev)
 245 {
 246         int r, i;
 247
 248         if (rdev->gart.pages) {
 249                 return 0;
 250         }
 251         /* We need PAGE_SIZE >= RADEON_GPU_PAGE_SIZE */
 252         if (PAGE_SIZE < RADEON_GPU_PAGE_SIZE) {
 253                 DRM_ERROR("Page size is smaller than GPU page size!\n");
 254                 return -EINVAL;
 255         }
 256         r = radeon_dummy_page_init(rdev);
 257         if (r)
 258                 return r;
 259         /* Compute table size */
 260         rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
 261         rdev->gart.num_gpu_pages = rdev->mc.gtt_size / RADEON_GPU_PAGE_SIZE;
 262         DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
 263                  rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
 264         /* Allocate pages table */
 265         rdev->gart.pages = kzalloc(sizeof(void *) * rdev->gart.num_cpu_pages,
 266                                    GFP_KERNEL);
 267         if (rdev->gart.pages == NULL) {
 268                 radeon_gart_fini(rdev);
 269                 return -ENOMEM;
 270         }
 271         rdev->gart.pages_addr = kzalloc(sizeof(dma_addr_t) *
 272                                         rdev->gart.num_cpu_pages, GFP_KERNEL);
 273         if (rdev->gart.pages_addr == NULL) {
 274                 radeon_gart_fini(rdev);
 275                 return -ENOMEM;
 276         }
 277         rdev->gart.ttm_alloced = kzalloc(sizeof(bool) *
 278                                          rdev->gart.num_cpu_pages, GFP_KERNEL);
 279         if (rdev->gart.ttm_alloced == NULL) {
 280                 radeon_gart_fini(rdev);
 281                 return -ENOMEM;
 282         }
 283         /* set GART entry to point to the dummy page by default */
 284         for (i = 0; i < rdev->gart.num_cpu_pages; i++) {
 285                 rdev->gart.pages_addr[i] = rdev->dummy_page.addr;
 286         }
 287         return 0;
 288 }
 289
 290 void radeon_gart_fini(struct radeon_device *rdev)
 291 {
 292         if (rdev->gart.pages && rdev->gart.pages_addr && rdev->gart.ready) {
 293                 /* unbind pages */
 294                 radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
 295         }
 296         rdev->gart.ready = false;
 297         kfree(rdev->gart.pages);
 298         kfree(rdev->gart.pages_addr);
 299         kfree(rdev->gart.ttm_alloced);
 300         rdev->gart.pages = NULL;
 301         rdev->gart.pages_addr = NULL;
 302         rdev->gart.ttm_alloced = NULL;
 303
 304         radeon_dummy_page_fini(rdev);
 305 }