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_object_create(rdev, NULL,
  82                                          rdev->gart.table_size,
  83                                          true,
  84                                          RADEON_GEM_DOMAIN_VRAM,
  85                                          false, &rdev->gart.table.vram.robj);
  86                 if (r) {
  87                         return r;
  88                 }
  89         }
  90         return 0;
  91 }
  92
  93 int radeon_gart_table_vram_pin(struct radeon_device *rdev)
  94 {
  95         uint64_t gpu_addr;
  96         int r;
  97
  98         r = radeon_object_pin(rdev->gart.table.vram.robj,
  99                               RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
 100         if (r) {
 101                 radeon_object_unref(&rdev->gart.table.vram.robj);
 102                 return r;
 103         }
 104         r = radeon_object_kmap(rdev->gart.table.vram.robj,
 105                                (void **)&rdev->gart.table.vram.ptr);
 106         if (r) {
 107                 radeon_object_unpin(rdev->gart.table.vram.robj);
 108                 radeon_object_unref(&rdev->gart.table.vram.robj);
 109                 DRM_ERROR("radeon: failed to map gart vram table.\n");
 110                 return r;
 111         }
 112         rdev->gart.table_addr = gpu_addr;
 113         return 0;
 114 }
 115
 116 void radeon_gart_table_vram_free(struct radeon_device *rdev)
 117 {
 118         if (rdev->gart.table.vram.robj == NULL) {
 119                 return;
 120         }
 121         radeon_object_kunmap(rdev->gart.table.vram.robj);
 122         radeon_object_unpin(rdev->gart.table.vram.robj);
 123         radeon_object_unref(&rdev->gart.table.vram.robj);
 124 }
 125
 126
 127
 128
 129 /*
 130  * Common gart functions.
 131  */
 132 void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
 133                         int pages)
 134 {
 135         unsigned t;
 136         unsigned p;
 137         int i, j;
 138
 139         if (!rdev->gart.ready) {
 140                 WARN(1, "trying to unbind memory to unitialized GART !\n");
 141                 return;
 142         }
 143         t = offset / 4096;
 144         p = t / (PAGE_SIZE / 4096);
 145         for (i = 0; i < pages; i++, p++) {
 146                 if (rdev->gart.pages[p]) {
 147                         pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
 148                                        PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 149                         rdev->gart.pages[p] = NULL;
 150                         rdev->gart.pages_addr[p] = 0;
 151                         for (j = 0; j < (PAGE_SIZE / 4096); j++, t++) {
 152                                 radeon_gart_set_page(rdev, t, 0);
 153                         }
 154                 }
 155         }
 156         mb();
 157         radeon_gart_tlb_flush(rdev);
 158 }
 159
 160 int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
 161                      int pages, struct page **pagelist)
 162 {
 163         unsigned t;
 164         unsigned p;
 165         uint64_t page_base;
 166         int i, j;
 167
 168         if (!rdev->gart.ready) {
 169                 DRM_ERROR("trying to bind memory to unitialized GART !\n");
 170                 return -EINVAL;
 171         }
 172         t = offset / 4096;
 173         p = t / (PAGE_SIZE / 4096);
 174
 175         for (i = 0; i < pages; i++, p++) {
 176                 /* we need to support large memory configurations */
 177                 /* assume that unbind have already been call on the range */
 178                 rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
 179                                                         0, PAGE_SIZE,
 180                                                         PCI_DMA_BIDIRECTIONAL);
 181                 if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
 182                         /* FIXME: failed to map page (return -ENOMEM?) */
 183                         radeon_gart_unbind(rdev, offset, pages);
 184                         return -ENOMEM;
 185                 }
 186                 rdev->gart.pages[p] = pagelist[i];
 187                 page_base = rdev->gart.pages_addr[p];
 188                 for (j = 0; j < (PAGE_SIZE / 4096); j++, t++) {
 189                         radeon_gart_set_page(rdev, t, page_base);
 190                         page_base += 4096;
 191                 }
 192         }
 193         mb();
 194         radeon_gart_tlb_flush(rdev);
 195         return 0;
 196 }
 197
 198 int radeon_gart_init(struct radeon_device *rdev)
 199 {
 200         if (rdev->gart.pages) {
 201                 return 0;
 202         }
 203         /* We need PAGE_SIZE >= 4096 */
 204         if (PAGE_SIZE < 4096) {
 205                 DRM_ERROR("Page size is smaller than GPU page size!\n");
 206                 return -EINVAL;
 207         }
 208         /* Compute table size */
 209         rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
 210         rdev->gart.num_gpu_pages = rdev->mc.gtt_size / 4096;
 211         DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
 212                  rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
 213         /* Allocate pages table */
 214         rdev->gart.pages = kzalloc(sizeof(void *) * rdev->gart.num_cpu_pages,
 215                                    GFP_KERNEL);
 216         if (rdev->gart.pages == NULL) {
 217                 radeon_gart_fini(rdev);
 218                 return -ENOMEM;
 219         }
 220         rdev->gart.pages_addr = kzalloc(sizeof(dma_addr_t) *
 221                                         rdev->gart.num_cpu_pages, GFP_KERNEL);
 222         if (rdev->gart.pages_addr == NULL) {
 223                 radeon_gart_fini(rdev);
 224                 return -ENOMEM;
 225         }
 226         return 0;
 227 }
 228
 229 void radeon_gart_fini(struct radeon_device *rdev)
 230 {
 231         if (rdev->gart.pages && rdev->gart.pages_addr && rdev->gart.ready) {
 232                 /* unbind pages */
 233                 radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
 234         }
 235         rdev->gart.ready = false;
 236         kfree(rdev->gart.pages);
 237         kfree(rdev->gart.pages_addr);
 238         rdev->gart.pages = NULL;
 239         rdev->gart.pages_addr = NULL;
 240 }