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         uint64_t gpu_addr;
  79         int r;
  80
  81         if (rdev->gart.table.vram.robj == NULL) {
  82                 r = radeon_object_create(rdev, NULL,
  83                                          rdev->gart.table_size,
  84                                          true,
  85                                          RADEON_GEM_DOMAIN_VRAM,
  86                                          false, &rdev->gart.table.vram.robj);
  87                 if (r) {
  88                         return r;
  89                 }
  90         }
  91         r = radeon_object_pin(rdev->gart.table.vram.robj,
  92                               RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
  93         if (r) {
  94                 radeon_object_unref(&rdev->gart.table.vram.robj);
  95                 return r;
  96         }
  97         r = radeon_object_kmap(rdev->gart.table.vram.robj,
  98                                (void **)&rdev->gart.table.vram.ptr);
  99         if (r) {
 100                 radeon_object_unpin(rdev->gart.table.vram.robj);
 101                 radeon_object_unref(&rdev->gart.table.vram.robj);
 102                 DRM_ERROR("radeon: failed to map gart vram table.\n");
 103                 return r;
 104         }
 105         rdev->gart.table_addr = gpu_addr;
 106         return 0;
 107 }
 108
 109 void radeon_gart_table_vram_free(struct radeon_device *rdev)
 110 {
 111         if (rdev->gart.table.vram.robj == NULL) {
 112                 return;
 113         }
 114         radeon_object_kunmap(rdev->gart.table.vram.robj);
 115         radeon_object_unpin(rdev->gart.table.vram.robj);
 116         radeon_object_unref(&rdev->gart.table.vram.robj);
 117 }
 118
 119
 120
 121
 122 /*
 123  * Common gart functions.
 124  */
 125 void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
 126                         int pages)
 127 {
 128         unsigned t;
 129         unsigned p;
 130         int i, j;
 131
 132         if (!rdev->gart.ready) {
 133                 WARN(1, "trying to unbind memory to unitialized GART !\n");
 134                 return;
 135         }
 136         t = offset / 4096;
 137         p = t / (PAGE_SIZE / 4096);
 138         for (i = 0; i < pages; i++, p++) {
 139                 if (rdev->gart.pages[p]) {
 140                         pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
 141                                        PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 142                         rdev->gart.pages[p] = NULL;
 143                         rdev->gart.pages_addr[p] = 0;
 144                         for (j = 0; j < (PAGE_SIZE / 4096); j++, t++) {
 145                                 radeon_gart_set_page(rdev, t, 0);
 146                         }
 147                 }
 148         }
 149         mb();
 150         radeon_gart_tlb_flush(rdev);
 151 }
 152
 153 int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
 154                      int pages, struct page **pagelist)
 155 {
 156         unsigned t;
 157         unsigned p;
 158         uint64_t page_base;
 159         int i, j;
 160
 161         if (!rdev->gart.ready) {
 162                 DRM_ERROR("trying to bind memory to unitialized GART !\n");
 163                 return -EINVAL;
 164         }
 165         t = offset / 4096;
 166         p = t / (PAGE_SIZE / 4096);
 167
 168         for (i = 0; i < pages; i++, p++) {
 169                 /* we need to support large memory configurations */
 170                 /* assume that unbind have already been call on the range */
 171                 rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
 172                                                         0, PAGE_SIZE,
 173                                                         PCI_DMA_BIDIRECTIONAL);
 174                 if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
 175                         /* FIXME: failed to map page (return -ENOMEM?) */
 176                         radeon_gart_unbind(rdev, offset, pages);
 177                         return -ENOMEM;
 178                 }
 179                 rdev->gart.pages[p] = pagelist[i];
 180                 page_base = (uint32_t)rdev->gart.pages_addr[p];
 181                 for (j = 0; j < (PAGE_SIZE / 4096); j++, t++) {
 182                         radeon_gart_set_page(rdev, t, page_base);
 183                         page_base += 4096;
 184                 }
 185         }
 186         mb();
 187         radeon_gart_tlb_flush(rdev);
 188         return 0;
 189 }
 190
 191 int radeon_gart_init(struct radeon_device *rdev)
 192 {
 193         if (rdev->gart.pages) {
 194                 return 0;
 195         }
 196         /* We need PAGE_SIZE >= 4096 */
 197         if (PAGE_SIZE < 4096) {
 198                 DRM_ERROR("Page size is smaller than GPU page size!\n");
 199                 return -EINVAL;
 200         }
 201         /* Compute table size */
 202         rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
 203         rdev->gart.num_gpu_pages = rdev->mc.gtt_size / 4096;
 204         DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
 205                  rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
 206         /* Allocate pages table */
 207         rdev->gart.pages = kzalloc(sizeof(void *) * rdev->gart.num_cpu_pages,
 208                                    GFP_KERNEL);
 209         if (rdev->gart.pages == NULL) {
 210                 radeon_gart_fini(rdev);
 211                 return -ENOMEM;
 212         }
 213         rdev->gart.pages_addr = kzalloc(sizeof(dma_addr_t) *
 214                                         rdev->gart.num_cpu_pages, GFP_KERNEL);
 215         if (rdev->gart.pages_addr == NULL) {
 216                 radeon_gart_fini(rdev);
 217                 return -ENOMEM;
 218         }
 219         return 0;
 220 }
 221
 222 void radeon_gart_fini(struct radeon_device *rdev)
 223 {
 224         if (rdev->gart.pages && rdev->gart.pages_addr && rdev->gart.ready) {
 225                 /* unbind pages */
 226                 radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
 227         }
 228         rdev->gart.ready = false;
 229         kfree(rdev->gart.pages);
 230         kfree(rdev->gart.pages_addr);
 231         rdev->gart.pages = NULL;
 232         rdev->gart.pages_addr = NULL;
 233 }