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/qxl_drm.h> 32 #include <drm/ttm/ttm_bo.h> 33 #include <drm/ttm/ttm_placement.h> 34 #include <drm/ttm/ttm_range_manager.h> 35 #include <drm/ttm/ttm_tt.h> 36 37 #include "qxl_drv.h" 38 #include "qxl_object.h" 39 40 static struct qxl_device *qxl_get_qdev(struct ttm_device *bdev) 41 { 42 struct qxl_mman *mman; 43 struct qxl_device *qdev; 44 45 mman = container_of(bdev, struct qxl_mman, bdev); 46 qdev = container_of(mman, struct qxl_device, mman); 47 return qdev; 48 } 49 50 static void qxl_evict_flags(struct ttm_buffer_object *bo, 51 struct ttm_placement *placement) 52 { 53 struct qxl_bo *qbo; 54 static const struct ttm_place placements = { 55 .fpfn = 0, 56 .lpfn = 0, 57 .mem_type = TTM_PL_SYSTEM, 58 .flags = 0 59 }; 60 61 if (!qxl_ttm_bo_is_qxl_bo(bo)) { 62 placement->placement = &placements; 63 placement->num_placement = 1; 64 return; 65 } 66 qbo = to_qxl_bo(bo); 67 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU); 68 *placement = qbo->placement; 69 } 70 71 int qxl_ttm_io_mem_reserve(struct ttm_device *bdev, 72 struct ttm_resource *mem) 73 { 74 struct qxl_device *qdev = qxl_get_qdev(bdev); 75 76 switch (mem->mem_type) { 77 case TTM_PL_SYSTEM: 78 /* system memory */ 79 return 0; 80 case TTM_PL_VRAM: 81 mem->bus.is_iomem = true; 82 mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base; 83 mem->bus.caching = ttm_write_combined; 84 break; 85 case TTM_PL_PRIV: 86 mem->bus.is_iomem = true; 87 mem->bus.offset = (mem->start << PAGE_SHIFT) + 88 qdev->surfaceram_base; 89 mem->bus.caching = ttm_write_combined; 90 break; 91 default: 92 return -EINVAL; 93 } 94 return 0; 95 } 96 97 /* 98 * TTM backend functions. 99 */ 100 static void qxl_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm) 101 { 102 ttm_tt_fini(ttm); 103 kfree(ttm); 104 } 105 106 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo, 107 uint32_t page_flags) 108 { 109 struct ttm_tt *ttm; 110 111 ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL); 112 if (ttm == NULL) 113 return NULL; 114 if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) { 115 kfree(ttm); 116 return NULL; 117 } 118 return ttm; 119 } 120 121 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 122 struct ttm_resource *new_mem) 123 { 124 struct qxl_bo *qbo; 125 struct qxl_device *qdev; 126 127 if (!qxl_ttm_bo_is_qxl_bo(bo) || !bo->resource) 128 return; 129 qbo = to_qxl_bo(bo); 130 qdev = to_qxl(qbo->tbo.base.dev); 131 132 if (bo->resource->mem_type == TTM_PL_PRIV && qbo->surface_id) 133 qxl_surface_evict(qdev, qbo, new_mem ? true : false); 134 } 135 136 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict, 137 struct ttm_operation_ctx *ctx, 138 struct ttm_resource *new_mem, 139 struct ttm_place *hop) 140 { 141 struct ttm_resource *old_mem = bo->resource; 142 int ret; 143 144 if (!old_mem) { 145 if (new_mem->mem_type != TTM_PL_SYSTEM) { 146 hop->mem_type = TTM_PL_SYSTEM; 147 hop->flags = TTM_PL_FLAG_TEMPORARY; 148 return -EMULTIHOP; 149 } 150 151 ttm_bo_move_null(bo, new_mem); 152 return 0; 153 } 154 155 qxl_bo_move_notify(bo, new_mem); 156 157 ret = ttm_bo_wait_ctx(bo, ctx); 158 if (ret) 159 return ret; 160 161 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 162 ttm_bo_move_null(bo, new_mem); 163 return 0; 164 } 165 return ttm_bo_move_memcpy(bo, ctx, new_mem); 166 } 167 168 static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo) 169 { 170 qxl_bo_move_notify(bo, NULL); 171 } 172 173 static struct ttm_device_funcs qxl_bo_driver = { 174 .ttm_tt_create = &qxl_ttm_tt_create, 175 .ttm_tt_destroy = &qxl_ttm_backend_destroy, 176 .eviction_valuable = ttm_bo_eviction_valuable, 177 .evict_flags = &qxl_evict_flags, 178 .move = &qxl_bo_move, 179 .io_mem_reserve = &qxl_ttm_io_mem_reserve, 180 .delete_mem_notify = &qxl_bo_delete_mem_notify, 181 }; 182 183 static int qxl_ttm_init_mem_type(struct qxl_device *qdev, 184 unsigned int type, 185 uint64_t size) 186 { 187 return ttm_range_man_init(&qdev->mman.bdev, type, false, size); 188 } 189 190 int qxl_ttm_init(struct qxl_device *qdev) 191 { 192 int r; 193 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 194 195 /* No others user of address space so set it to 0 */ 196 r = ttm_device_init(&qdev->mman.bdev, &qxl_bo_driver, NULL, 197 qdev->ddev.anon_inode->i_mapping, 198 qdev->ddev.vma_offset_manager, 199 false, false); 200 if (r) { 201 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 202 return r; 203 } 204 /* NOTE: this includes the framebuffer (aka surface 0) */ 205 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 206 r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages); 207 if (r) { 208 DRM_ERROR("Failed initializing VRAM heap.\n"); 209 return r; 210 } 211 r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV, 212 qdev->surfaceram_size / PAGE_SIZE); 213 if (r) { 214 DRM_ERROR("Failed initializing Surfaces heap.\n"); 215 return r; 216 } 217 DRM_INFO("qxl: %uM of VRAM memory size\n", 218 (unsigned int)qdev->vram_size / (1024 * 1024)); 219 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 220 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 221 DRM_INFO("qxl: %uM of Surface memory size\n", 222 (unsigned int)qdev->surfaceram_size / (1024 * 1024)); 223 return 0; 224 } 225 226 void qxl_ttm_fini(struct qxl_device *qdev) 227 { 228 ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM); 229 ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV); 230 ttm_device_fini(&qdev->mman.bdev); 231 DRM_INFO("qxl: ttm finalized\n"); 232 } 233 234 void qxl_ttm_debugfs_init(struct qxl_device *qdev) 235 { 236 #if defined(CONFIG_DEBUG_FS) 237 ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev, 238 TTM_PL_VRAM), 239 qdev->ddev.primary->debugfs_root, "qxl_mem_mm"); 240 ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev, 241 TTM_PL_PRIV), 242 qdev->ddev.primary->debugfs_root, "qxl_surf_mm"); 243 #endif 244 } 245