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.table.ram.ptr = ptr;
  53         memset((void *)rdev->gart.table.ram.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.table.ram.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.table.ram.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.table.ram.ptr,
  71                             rdev->gart.table_addr);
  72         rdev->gart.table.ram.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.table.vram.robj == NULL) {
  81                 r = radeon_bo_create(rdev, rdev->gart.table_size,
  82                                      PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM,
  83                                      &rdev->gart.table.vram.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.table.vram.robj, false);
  97         if (unlikely(r != 0))
  98                 return r;
  99         r = radeon_bo_pin(rdev->gart.table.vram.robj,
 100                                 RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
 101         if (r) {
 102                 radeon_bo_unreserve(rdev->gart.table.vram.robj);
 103                 return r;
 104         }
 105         r = radeon_bo_kmap(rdev->gart.table.vram.robj,
 106                                 (void **)&rdev->gart.table.vram.ptr);
 107         if (r)
 108                 radeon_bo_unpin(rdev->gart.table.vram.robj);
 109         radeon_bo_unreserve(rdev->gart.table.vram.robj);
 110         rdev->gart.table_addr = gpu_addr;
 111         return r;
 112 }
 113
 114 void radeon_gart_table_vram_free(struct radeon_device *rdev)
 115 {
 116         int r;
 117
 118         if (rdev->gart.table.vram.robj == NULL) {
 119                 return;
 120         }
 121         r = radeon_bo_reserve(rdev->gart.table.vram.robj, false);
 122         if (likely(r == 0)) {
 123                 radeon_bo_kunmap(rdev->gart.table.vram.robj);
 124                 radeon_bo_unpin(rdev->gart.table.vram.robj);
 125                 radeon_bo_unreserve(rdev->gart.table.vram.robj);
 126         }
 127         radeon_bo_unref(&rdev->gart.table.vram.robj);
 128 }
 129
 130
 131
 132
 133 /*
 134  * Common gart functions.
 135  */
 136 void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
 137                         int pages)
 138 {
 139         unsigned t;
 140         unsigned p;
 141         int i, j;
 142         u64 page_base;
 143
 144         if (!rdev->gart.ready) {
 145                 WARN(1, "trying to unbind memory to unitialized GART !\n");
 146                 return;
 147         }
 148         t = offset / RADEON_GPU_PAGE_SIZE;
 149         p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 150         for (i = 0; i < pages; i++, p++) {
 151                 if (rdev->gart.pages[p]) {
 152                         if (!rdev->gart.ttm_alloced[p])
 153                                 pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
 154                                                 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 155                         rdev->gart.pages[p] = NULL;
 156                         rdev->gart.pages_addr[p] = rdev->dummy_page.addr;
 157                         page_base = rdev->gart.pages_addr[p];
 158                         for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 159                                 radeon_gart_set_page(rdev, t, page_base);
 160                                 page_base += RADEON_GPU_PAGE_SIZE;
 161                         }
 162                 }
 163         }
 164         mb();
 165         radeon_gart_tlb_flush(rdev);
 166 }
 167
 168 int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
 169                      int pages, struct page **pagelist, dma_addr_t *dma_addr)
 170 {
 171         unsigned t;
 172         unsigned p;
 173         uint64_t page_base;
 174         int i, j;
 175
 176         if (!rdev->gart.ready) {
 177                 WARN(1, "trying to bind memory to unitialized GART !\n");
 178                 return -EINVAL;
 179         }
 180         t = offset / RADEON_GPU_PAGE_SIZE;
 181         p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 182
 183         for (i = 0; i < pages; i++, p++) {
 184                 /* On TTM path, we only use the DMA API if TTM_PAGE_FLAG_DMA32
 185                  * is requested. */
 186                 if (dma_addr[i] != DMA_ERROR_CODE) {
 187                         rdev->gart.ttm_alloced[p] = true;
 188                         rdev->gart.pages_addr[p] = dma_addr[i];
 189                 } else {
 190                         /* we need to support large memory configurations */
 191                         /* assume that unbind have already been call on the range */
 192                         rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
 193                                                         0, PAGE_SIZE,
 194                                                         PCI_DMA_BIDIRECTIONAL);
 195                         if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
 196                                 /* FIXME: failed to map page (return -ENOMEM?) */
 197                                 radeon_gart_unbind(rdev, offset, pages);
 198                                 return -ENOMEM;
 199                         }
 200                 }
 201                 rdev->gart.pages[p] = pagelist[i];
 202                 page_base = rdev->gart.pages_addr[p];
 203                 for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 204                         radeon_gart_set_page(rdev, t, page_base);
 205                         page_base += RADEON_GPU_PAGE_SIZE;
 206                 }
 207         }
 208         mb();
 209         radeon_gart_tlb_flush(rdev);
 210         return 0;
 211 }
 212
 213 void radeon_gart_restore(struct radeon_device *rdev)
 214 {
 215         int i, j, t;
 216         u64 page_base;
 217
 218         for (i = 0, t = 0; i < rdev->gart.num_cpu_pages; i++) {
 219                 page_base = rdev->gart.pages_addr[i];
 220                 for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 221                         radeon_gart_set_page(rdev, t, page_base);
 222                         page_base += RADEON_GPU_PAGE_SIZE;
 223                 }
 224         }
 225         mb();
 226         radeon_gart_tlb_flush(rdev);
 227 }
 228
 229 int radeon_gart_init(struct radeon_device *rdev)
 230 {
 231         int r, i;
 232
 233         if (rdev->gart.pages) {
 234                 return 0;
 235         }
 236         /* We need PAGE_SIZE >= RADEON_GPU_PAGE_SIZE */
 237         if (PAGE_SIZE < RADEON_GPU_PAGE_SIZE) {
 238                 DRM_ERROR("Page size is smaller than GPU page size!\n");
 239                 return -EINVAL;
 240         }
 241         r = radeon_dummy_page_init(rdev);
 242         if (r)
 243                 return r;
 244         /* Compute table size */
 245         rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
 246         rdev->gart.num_gpu_pages = rdev->mc.gtt_size / RADEON_GPU_PAGE_SIZE;
 247         DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
 248                  rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
 249         /* Allocate pages table */
 250         rdev->gart.pages = kzalloc(sizeof(void *) * rdev->gart.num_cpu_pages,
 251                                    GFP_KERNEL);
 252         if (rdev->gart.pages == NULL) {
 253                 radeon_gart_fini(rdev);
 254                 return -ENOMEM;
 255         }
 256         rdev->gart.pages_addr = kzalloc(sizeof(dma_addr_t) *
 257                                         rdev->gart.num_cpu_pages, GFP_KERNEL);
 258         if (rdev->gart.pages_addr == NULL) {
 259                 radeon_gart_fini(rdev);
 260                 return -ENOMEM;
 261         }
 262         rdev->gart.ttm_alloced = kzalloc(sizeof(bool) *
 263                                          rdev->gart.num_cpu_pages, GFP_KERNEL);
 264         if (rdev->gart.ttm_alloced == NULL) {
 265                 radeon_gart_fini(rdev);
 266                 return -ENOMEM;
 267         }
 268         /* set GART entry to point to the dummy page by default */
 269         for (i = 0; i < rdev->gart.num_cpu_pages; i++) {
 270                 rdev->gart.pages_addr[i] = rdev->dummy_page.addr;
 271         }
 272         return 0;
 273 }
 274
 275 void radeon_gart_fini(struct radeon_device *rdev)
 276 {
 277         if (rdev->gart.pages && rdev->gart.pages_addr && rdev->gart.ready) {
 278                 /* unbind pages */
 279                 radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
 280         }
 281         rdev->gart.ready = false;
 282         kfree(rdev->gart.pages);
 283         kfree(rdev->gart.pages_addr);
 284         kfree(rdev->gart.ttm_alloced);
 285         rdev->gart.pages = NULL;
 286         rdev->gart.pages_addr = NULL;
 287         rdev->gart.ttm_alloced = NULL;
 288
 289         radeon_dummy_page_fini(rdev);
 290 }