1 /* 2 * Copyright 2013 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Dave Airlie 23 * Alon Levy 24 */ 25 26 #include <linux/delay.h> 27 28 #include <drm/drm.h> 29 #include <drm/drm_file.h> 30 #include <drm/drm_debugfs.h> 31 #include <drm/drm_print.h> 32 #include <drm/qxl_drm.h> 33 #include <drm/ttm/ttm_bo.h> 34 #include <drm/ttm/ttm_placement.h> 35 #include <drm/ttm/ttm_range_manager.h> 36 #include <drm/ttm/ttm_tt.h> 37 38 #include "qxl_drv.h" 39 #include "qxl_object.h" 40 41 static struct qxl_device *qxl_get_qdev(struct ttm_device *bdev) 42 { 43 struct qxl_mman *mman; 44 struct qxl_device *qdev; 45 46 mman = container_of(bdev, struct qxl_mman, bdev); 47 qdev = container_of(mman, struct qxl_device, mman); 48 return qdev; 49 } 50 51 static void qxl_evict_flags(struct ttm_buffer_object *bo, 52 struct ttm_placement *placement) 53 { 54 struct qxl_bo *qbo; 55 static const struct ttm_place placements = { 56 .fpfn = 0, 57 .lpfn = 0, 58 .mem_type = TTM_PL_SYSTEM, 59 .flags = 0 60 }; 61 62 if (!qxl_ttm_bo_is_qxl_bo(bo)) { 63 placement->placement = &placements; 64 placement->num_placement = 1; 65 return; 66 } 67 qbo = to_qxl_bo(bo); 68 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU); 69 *placement = qbo->placement; 70 } 71 72 int qxl_ttm_io_mem_reserve(struct ttm_device *bdev, 73 struct ttm_resource *mem) 74 { 75 struct qxl_device *qdev = qxl_get_qdev(bdev); 76 77 switch (mem->mem_type) { 78 case TTM_PL_SYSTEM: 79 /* system memory */ 80 return 0; 81 case TTM_PL_VRAM: 82 mem->bus.is_iomem = true; 83 mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base; 84 mem->bus.caching = ttm_write_combined; 85 break; 86 case TTM_PL_PRIV: 87 mem->bus.is_iomem = true; 88 mem->bus.offset = (mem->start << PAGE_SHIFT) + 89 qdev->surfaceram_base; 90 mem->bus.caching = ttm_write_combined; 91 break; 92 default: 93 return -EINVAL; 94 } 95 return 0; 96 } 97 98 /* 99 * TTM backend functions. 100 */ 101 static void qxl_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm) 102 { 103 ttm_tt_fini(ttm); 104 kfree(ttm); 105 } 106 107 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo, 108 uint32_t page_flags) 109 { 110 struct ttm_tt *ttm; 111 112 ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL); 113 if (ttm == NULL) 114 return NULL; 115 if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) { 116 kfree(ttm); 117 return NULL; 118 } 119 return ttm; 120 } 121 122 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 123 struct ttm_resource *new_mem) 124 { 125 struct qxl_bo *qbo; 126 struct qxl_device *qdev; 127 128 if (!qxl_ttm_bo_is_qxl_bo(bo) || !bo->resource) 129 return; 130 qbo = to_qxl_bo(bo); 131 qdev = to_qxl(qbo->tbo.base.dev); 132 133 if (bo->resource->mem_type == TTM_PL_PRIV && qbo->surface_id) 134 qxl_surface_evict(qdev, qbo, new_mem ? true : false); 135 } 136 137 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict, 138 struct ttm_operation_ctx *ctx, 139 struct ttm_resource *new_mem, 140 struct ttm_place *hop) 141 { 142 struct ttm_resource *old_mem = bo->resource; 143 int ret; 144 145 if (!old_mem) { 146 if (new_mem->mem_type != TTM_PL_SYSTEM) { 147 hop->mem_type = TTM_PL_SYSTEM; 148 hop->flags = TTM_PL_FLAG_TEMPORARY; 149 return -EMULTIHOP; 150 } 151 152 ttm_bo_move_null(bo, new_mem); 153 return 0; 154 } 155 156 qxl_bo_move_notify(bo, new_mem); 157 158 ret = ttm_bo_wait_ctx(bo, ctx); 159 if (ret) 160 return ret; 161 162 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 163 ttm_bo_move_null(bo, new_mem); 164 return 0; 165 } 166 return ttm_bo_move_memcpy(bo, ctx, new_mem); 167 } 168 169 static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo) 170 { 171 qxl_bo_move_notify(bo, NULL); 172 } 173 174 static struct ttm_device_funcs qxl_bo_driver = { 175 .ttm_tt_create = &qxl_ttm_tt_create, 176 .ttm_tt_destroy = &qxl_ttm_backend_destroy, 177 .eviction_valuable = ttm_bo_eviction_valuable, 178 .evict_flags = &qxl_evict_flags, 179 .move = &qxl_bo_move, 180 .io_mem_reserve = &qxl_ttm_io_mem_reserve, 181 .delete_mem_notify = &qxl_bo_delete_mem_notify, 182 }; 183 184 static int qxl_ttm_init_mem_type(struct qxl_device *qdev, 185 unsigned int type, 186 uint64_t size) 187 { 188 return ttm_range_man_init(&qdev->mman.bdev, type, false, size); 189 } 190 191 int qxl_ttm_init(struct qxl_device *qdev) 192 { 193 int r; 194 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 195 196 /* No others user of address space so set it to 0 */ 197 r = ttm_device_init(&qdev->mman.bdev, &qxl_bo_driver, NULL, 198 qdev->ddev.anon_inode->i_mapping, 199 qdev->ddev.vma_offset_manager, 200 false, false); 201 if (r) { 202 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 203 return r; 204 } 205 /* NOTE: this includes the framebuffer (aka surface 0) */ 206 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 207 r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages); 208 if (r) { 209 DRM_ERROR("Failed initializing VRAM heap.\n"); 210 return r; 211 } 212 r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV, 213 qdev->surfaceram_size / PAGE_SIZE); 214 if (r) { 215 DRM_ERROR("Failed initializing Surfaces heap.\n"); 216 return r; 217 } 218 DRM_INFO("qxl: %uM of VRAM memory size\n", 219 (unsigned int)qdev->vram_size / (1024 * 1024)); 220 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 221 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 222 DRM_INFO("qxl: %uM of Surface memory size\n", 223 (unsigned int)qdev->surfaceram_size / (1024 * 1024)); 224 return 0; 225 } 226 227 void qxl_ttm_fini(struct qxl_device *qdev) 228 { 229 ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM); 230 ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV); 231 ttm_device_fini(&qdev->mman.bdev); 232 DRM_INFO("qxl: ttm finalized\n"); 233 } 234 235 void qxl_ttm_debugfs_init(struct qxl_device *qdev) 236 { 237 #if defined(CONFIG_DEBUG_FS) 238 ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev, 239 TTM_PL_VRAM), 240 qdev->ddev.primary->debugfs_root, "qxl_mem_mm"); 241 ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev, 242 TTM_PL_PRIV), 243 qdev->ddev.primary->debugfs_root, "qxl_surf_mm"); 244 #endif 245 } 246