LXR linux/drivers/gpu/drm/radeon/radeon

   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 */
  36int 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
  57void 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
  76int 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
  93int 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
 116void 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 */
 132void 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 / RADEON_GPU_PAGE_SIZE;
 144        p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 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 / RADEON_GPU_PAGE_SIZE); j++, t++) {
 152                                radeon_gart_set_page(rdev, t, 0);
 153                        }
 154                }
 155        }
 156        mb();
 157        radeon_gart_tlb_flush(rdev);
 158}
 159
 160int 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 / RADEON_GPU_PAGE_SIZE;
 173        p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 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 / RADEON_GPU_PAGE_SIZE); j++, t++) {
 189                        radeon_gart_set_page(rdev, t, page_base);
 190                        page_base += RADEON_GPU_PAGE_SIZE;
 191                }
 192        }
 193        mb();
 194        radeon_gart_tlb_flush(rdev);
 195        return 0;
 196}
 197
 198int radeon_gart_init(struct radeon_device *rdev)
 199{
 200        if (rdev->gart.pages) {
 201                return 0;
 202        }
 203        /* We need PAGE_SIZE >= RADEON_GPU_PAGE_SIZE */
 204        if (PAGE_SIZE < RADEON_GPU_PAGE_SIZE) {
 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 / RADEON_GPU_PAGE_SIZE;
 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
 229void 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}
 241