1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */ 2 /* 3 * Copyright 2021 VMware, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person 6 * obtaining a copy of this software and associated documentation 7 * files (the "Software"), to deal in the Software without 8 * restriction, including without limitation the rights to use, copy, 9 * modify, merge, publish, distribute, sublicense, and/or sell copies 10 * of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 * 25 */ 26 27 #include "vmwgfx_drv.h" 28 29 #include "drm/drm_prime.h" 30 #include "drm/drm_gem_ttm_helper.h" 31 32 /** 33 * vmw_buffer_object - Convert a struct ttm_buffer_object to a struct 34 * vmw_buffer_object. 35 * 36 * @bo: Pointer to the TTM buffer object. 37 * Return: Pointer to the struct vmw_buffer_object embedding the 38 * TTM buffer object. 39 */ 40 static struct vmw_buffer_object * 41 vmw_buffer_object(struct ttm_buffer_object *bo) 42 { 43 return container_of(bo, struct vmw_buffer_object, base); 44 } 45 46 static void vmw_gem_object_free(struct drm_gem_object *gobj) 47 { 48 struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gobj); 49 if (bo) { 50 ttm_bo_put(bo); 51 } 52 } 53 54 static int vmw_gem_object_open(struct drm_gem_object *obj, 55 struct drm_file *file_priv) 56 { 57 return 0; 58 } 59 60 static void vmw_gem_object_close(struct drm_gem_object *obj, 61 struct drm_file *file_priv) 62 { 63 } 64 65 static int vmw_gem_pin_private(struct drm_gem_object *obj, bool do_pin) 66 { 67 struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj); 68 struct vmw_buffer_object *vbo = vmw_buffer_object(bo); 69 int ret; 70 71 ret = ttm_bo_reserve(bo, false, false, NULL); 72 if (unlikely(ret != 0)) 73 goto err; 74 75 vmw_bo_pin_reserved(vbo, do_pin); 76 77 ttm_bo_unreserve(bo); 78 79 err: 80 return ret; 81 } 82 83 84 static int vmw_gem_object_pin(struct drm_gem_object *obj) 85 { 86 return vmw_gem_pin_private(obj, true); 87 } 88 89 static void vmw_gem_object_unpin(struct drm_gem_object *obj) 90 { 91 vmw_gem_pin_private(obj, false); 92 } 93 94 static struct sg_table *vmw_gem_object_get_sg_table(struct drm_gem_object *obj) 95 { 96 struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj); 97 struct vmw_ttm_tt *vmw_tt = 98 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm); 99 100 if (vmw_tt->vsgt.sgt) 101 return vmw_tt->vsgt.sgt; 102 103 return drm_prime_pages_to_sg(obj->dev, vmw_tt->dma_ttm.pages, vmw_tt->dma_ttm.num_pages); 104 } 105 106 107 static const struct drm_gem_object_funcs vmw_gem_object_funcs = { 108 .free = vmw_gem_object_free, 109 .open = vmw_gem_object_open, 110 .close = vmw_gem_object_close, 111 .print_info = drm_gem_ttm_print_info, 112 .pin = vmw_gem_object_pin, 113 .unpin = vmw_gem_object_unpin, 114 .get_sg_table = vmw_gem_object_get_sg_table, 115 .vmap = drm_gem_ttm_vmap, 116 .vunmap = drm_gem_ttm_vunmap, 117 .mmap = drm_gem_ttm_mmap, 118 }; 119 120 /** 121 * vmw_gem_destroy - vmw buffer object destructor 122 * 123 * @bo: Pointer to the embedded struct ttm_buffer_object 124 */ 125 void vmw_gem_destroy(struct ttm_buffer_object *bo) 126 { 127 struct vmw_buffer_object *vbo = vmw_buffer_object(bo); 128 129 WARN_ON(vbo->dirty); 130 WARN_ON(!RB_EMPTY_ROOT(&vbo->res_tree)); 131 vmw_bo_unmap(vbo); 132 drm_gem_object_release(&vbo->base.base); 133 kfree(vbo); 134 } 135 136 int vmw_gem_object_create_with_handle(struct vmw_private *dev_priv, 137 struct drm_file *filp, 138 uint32_t size, 139 uint32_t *handle, 140 struct vmw_buffer_object **p_vbo) 141 { 142 int ret; 143 144 ret = vmw_bo_create(dev_priv, size, 145 (dev_priv->has_mob) ? 146 &vmw_sys_placement : 147 &vmw_vram_sys_placement, 148 true, false, &vmw_gem_destroy, p_vbo); 149 if (ret != 0) 150 goto out_no_bo; 151 152 (*p_vbo)->base.base.funcs = &vmw_gem_object_funcs; 153 154 ret = drm_gem_handle_create(filp, &(*p_vbo)->base.base, handle); 155 out_no_bo: 156 return ret; 157 } 158 159 160 int vmw_gem_object_create_ioctl(struct drm_device *dev, void *data, 161 struct drm_file *filp) 162 { 163 struct vmw_private *dev_priv = vmw_priv(dev); 164 union drm_vmw_alloc_dmabuf_arg *arg = 165 (union drm_vmw_alloc_dmabuf_arg *)data; 166 struct drm_vmw_alloc_dmabuf_req *req = &arg->req; 167 struct drm_vmw_dmabuf_rep *rep = &arg->rep; 168 struct vmw_buffer_object *vbo; 169 uint32_t handle; 170 int ret; 171 172 ret = vmw_gem_object_create_with_handle(dev_priv, filp, 173 req->size, &handle, &vbo); 174 if (ret) 175 goto out_no_bo; 176 177 rep->handle = handle; 178 rep->map_handle = drm_vma_node_offset_addr(&vbo->base.base.vma_node); 179 rep->cur_gmr_id = handle; 180 rep->cur_gmr_offset = 0; 181 /* drop reference from allocate - handle holds it now */ 182 drm_gem_object_put(&vbo->base.base); 183 out_no_bo: 184 return ret; 185 } 186 187 #if defined(CONFIG_DEBUG_FS) 188 189 static void vmw_bo_print_info(int id, struct vmw_buffer_object *bo, struct seq_file *m) 190 { 191 const char *placement; 192 const char *type; 193 194 switch (bo->base.resource->mem_type) { 195 case TTM_PL_SYSTEM: 196 placement = " CPU"; 197 break; 198 case VMW_PL_GMR: 199 placement = " GMR"; 200 break; 201 case VMW_PL_MOB: 202 placement = " MOB"; 203 break; 204 case VMW_PL_SYSTEM: 205 placement = "VCPU"; 206 break; 207 case TTM_PL_VRAM: 208 placement = "VRAM"; 209 break; 210 default: 211 placement = "None"; 212 break; 213 } 214 215 switch (bo->base.type) { 216 case ttm_bo_type_device: 217 type = "device"; 218 break; 219 case ttm_bo_type_kernel: 220 type = "kernel"; 221 break; 222 case ttm_bo_type_sg: 223 type = "sg "; 224 break; 225 default: 226 type = "none "; 227 break; 228 } 229 230 seq_printf(m, "\t\t0x%08x: %12zu bytes %s, type = %s", 231 id, bo->base.base.size, placement, type); 232 seq_printf(m, ", priority = %u, pin_count = %u, GEM refs = %d, TTM refs = %d", 233 bo->base.priority, 234 bo->base.pin_count, 235 kref_read(&bo->base.base.refcount), 236 kref_read(&bo->base.kref)); 237 seq_puts(m, "\n"); 238 } 239 240 static int vmw_debugfs_gem_info_show(struct seq_file *m, void *unused) 241 { 242 struct vmw_private *vdev = (struct vmw_private *)m->private; 243 struct drm_device *dev = &vdev->drm; 244 struct drm_file *file; 245 int r; 246 247 r = mutex_lock_interruptible(&dev->filelist_mutex); 248 if (r) 249 return r; 250 251 list_for_each_entry(file, &dev->filelist, lhead) { 252 struct task_struct *task; 253 struct drm_gem_object *gobj; 254 int id; 255 256 /* 257 * Although we have a valid reference on file->pid, that does 258 * not guarantee that the task_struct who called get_pid() is 259 * still alive (e.g. get_pid(current) => fork() => exit()). 260 * Therefore, we need to protect this ->comm access using RCU. 261 */ 262 rcu_read_lock(); 263 task = pid_task(file->pid, PIDTYPE_PID); 264 seq_printf(m, "pid %8d command %s:\n", pid_nr(file->pid), 265 task ? task->comm : "<unknown>"); 266 rcu_read_unlock(); 267 268 spin_lock(&file->table_lock); 269 idr_for_each_entry(&file->object_idr, gobj, id) { 270 struct vmw_buffer_object *bo = gem_to_vmw_bo(gobj); 271 272 vmw_bo_print_info(id, bo, m); 273 } 274 spin_unlock(&file->table_lock); 275 } 276 277 mutex_unlock(&dev->filelist_mutex); 278 return 0; 279 } 280 281 DEFINE_SHOW_ATTRIBUTE(vmw_debugfs_gem_info); 282 283 #endif 284 285 void vmw_debugfs_gem_init(struct vmw_private *vdev) 286 { 287 #if defined(CONFIG_DEBUG_FS) 288 struct drm_minor *minor = vdev->drm.primary; 289 struct dentry *root = minor->debugfs_root; 290 291 debugfs_create_file("vmwgfx_gem_info", 0444, root, vdev, 292 &vmw_debugfs_gem_info_fops); 293 #endif 294 } 295