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 } 234