1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */ 2 /* 3 * Copyright 2021-2023 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_bo.h" 28 #include "vmwgfx_drv.h" 29 30 #include "drm/drm_prime.h" 31 #include "drm/drm_gem_ttm_helper.h" 32 33 #include <linux/debugfs.h> 34 35 static void vmw_gem_object_free(struct drm_gem_object *gobj) 36 { 37 struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gobj); 38 if (bo) 39 ttm_bo_put(bo); 40 } 41 42 static int vmw_gem_object_open(struct drm_gem_object *obj, 43 struct drm_file *file_priv) 44 { 45 return 0; 46 } 47 48 static void vmw_gem_object_close(struct drm_gem_object *obj, 49 struct drm_file *file_priv) 50 { 51 } 52 53 static int vmw_gem_object_pin(struct drm_gem_object *obj) 54 { 55 struct vmw_bo *vbo = to_vmw_bo(obj); 56 57 vmw_bo_pin_reserved(vbo, true); 58 59 return 0; 60 } 61 62 static void vmw_gem_object_unpin(struct drm_gem_object *obj) 63 { 64 struct vmw_bo *vbo = to_vmw_bo(obj); 65 66 vmw_bo_pin_reserved(vbo, false); 67 } 68 69 static struct sg_table *vmw_gem_object_get_sg_table(struct drm_gem_object *obj) 70 { 71 struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj); 72 struct vmw_ttm_tt *vmw_tt = 73 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm); 74 75 if (vmw_tt->vsgt.sgt) 76 return vmw_tt->vsgt.sgt; 77 78 return drm_prime_pages_to_sg(obj->dev, vmw_tt->dma_ttm.pages, vmw_tt->dma_ttm.num_pages); 79 } 80 81 static const struct vm_operations_struct vmw_vm_ops = { 82 .pfn_mkwrite = vmw_bo_vm_mkwrite, 83 .page_mkwrite = vmw_bo_vm_mkwrite, 84 .fault = vmw_bo_vm_fault, 85 .open = ttm_bo_vm_open, 86 .close = ttm_bo_vm_close, 87 }; 88 89 static const struct drm_gem_object_funcs vmw_gem_object_funcs = { 90 .free = vmw_gem_object_free, 91 .open = vmw_gem_object_open, 92 .close = vmw_gem_object_close, 93 .print_info = drm_gem_ttm_print_info, 94 .pin = vmw_gem_object_pin, 95 .unpin = vmw_gem_object_unpin, 96 .get_sg_table = vmw_gem_object_get_sg_table, 97 .vmap = drm_gem_ttm_vmap, 98 .vunmap = drm_gem_ttm_vunmap, 99 .mmap = drm_gem_ttm_mmap, 100 .vm_ops = &vmw_vm_ops, 101 }; 102 103 int vmw_gem_object_create(struct vmw_private *vmw, 104 struct vmw_bo_params *params, 105 struct vmw_bo **p_vbo) 106 { 107 int ret = vmw_bo_create(vmw, params, p_vbo); 108 109 if (ret != 0) 110 goto out_no_bo; 111 112 (*p_vbo)->tbo.base.funcs = &vmw_gem_object_funcs; 113 out_no_bo: 114 return ret; 115 } 116 117 int vmw_gem_object_create_with_handle(struct vmw_private *dev_priv, 118 struct drm_file *filp, 119 uint32_t size, 120 uint32_t *handle, 121 struct vmw_bo **p_vbo) 122 { 123 int ret; 124 struct vmw_bo_params params = { 125 .domain = (dev_priv->has_mob) ? VMW_BO_DOMAIN_SYS : VMW_BO_DOMAIN_VRAM, 126 .busy_domain = VMW_BO_DOMAIN_SYS, 127 .bo_type = ttm_bo_type_device, 128 .size = size, 129 .pin = false 130 }; 131 132 ret = vmw_gem_object_create(dev_priv, ¶ms, p_vbo); 133 if (ret != 0) 134 goto out_no_bo; 135 136 ret = drm_gem_handle_create(filp, &(*p_vbo)->tbo.base, handle); 137 out_no_bo: 138 return ret; 139 } 140 141 struct drm_gem_object *vmw_prime_import_sg_table(struct drm_device *dev, 142 struct dma_buf_attachment *attach, 143 struct sg_table *table) 144 { 145 int ret; 146 struct vmw_private *dev_priv = vmw_priv(dev); 147 struct drm_gem_object *gem = NULL; 148 struct vmw_bo *vbo; 149 struct vmw_bo_params params = { 150 .domain = (dev_priv->has_mob) ? VMW_BO_DOMAIN_SYS : VMW_BO_DOMAIN_VRAM, 151 .busy_domain = VMW_BO_DOMAIN_SYS, 152 .bo_type = ttm_bo_type_sg, 153 .size = attach->dmabuf->size, 154 .pin = false, 155 .resv = attach->dmabuf->resv, 156 .sg = table, 157 158 }; 159 160 dma_resv_lock(params.resv, NULL); 161 162 ret = vmw_bo_create(dev_priv, ¶ms, &vbo); 163 if (ret != 0) 164 goto out_no_bo; 165 166 vbo->tbo.base.funcs = &vmw_gem_object_funcs; 167 168 gem = &vbo->tbo.base; 169 out_no_bo: 170 dma_resv_unlock(params.resv); 171 return gem; 172 } 173 174 int vmw_gem_object_create_ioctl(struct drm_device *dev, void *data, 175 struct drm_file *filp) 176 { 177 struct vmw_private *dev_priv = vmw_priv(dev); 178 union drm_vmw_alloc_dmabuf_arg *arg = 179 (union drm_vmw_alloc_dmabuf_arg *)data; 180 struct drm_vmw_alloc_dmabuf_req *req = &arg->req; 181 struct drm_vmw_dmabuf_rep *rep = &arg->rep; 182 struct vmw_bo *vbo; 183 uint32_t handle; 184 int ret; 185 186 ret = vmw_gem_object_create_with_handle(dev_priv, filp, 187 req->size, &handle, &vbo); 188 if (ret) 189 goto out_no_bo; 190 191 rep->handle = handle; 192 rep->map_handle = drm_vma_node_offset_addr(&vbo->tbo.base.vma_node); 193 rep->cur_gmr_id = handle; 194 rep->cur_gmr_offset = 0; 195 /* drop reference from allocate - handle holds it now */ 196 drm_gem_object_put(&vbo->tbo.base); 197 out_no_bo: 198 return ret; 199 } 200 201 #if defined(CONFIG_DEBUG_FS) 202 203 static void vmw_bo_print_info(int id, struct vmw_bo *bo, struct seq_file *m) 204 { 205 const char *placement; 206 const char *type; 207 208 switch (bo->tbo.resource->mem_type) { 209 case TTM_PL_SYSTEM: 210 placement = " CPU"; 211 break; 212 case VMW_PL_GMR: 213 placement = " GMR"; 214 break; 215 case VMW_PL_MOB: 216 placement = " MOB"; 217 break; 218 case VMW_PL_SYSTEM: 219 placement = "VCPU"; 220 break; 221 case TTM_PL_VRAM: 222 placement = "VRAM"; 223 break; 224 default: 225 placement = "None"; 226 break; 227 } 228 229 switch (bo->tbo.type) { 230 case ttm_bo_type_device: 231 type = "device"; 232 break; 233 case ttm_bo_type_kernel: 234 type = "kernel"; 235 break; 236 case ttm_bo_type_sg: 237 type = "sg "; 238 break; 239 default: 240 type = "none "; 241 break; 242 } 243 244 seq_printf(m, "\t\t0x%08x: %12zu bytes %s, type = %s", 245 id, bo->tbo.base.size, placement, type); 246 seq_printf(m, ", priority = %u, pin_count = %u, GEM refs = %d, TTM refs = %d", 247 bo->tbo.priority, 248 bo->tbo.pin_count, 249 kref_read(&bo->tbo.base.refcount), 250 kref_read(&bo->tbo.kref)); 251 seq_puts(m, "\n"); 252 } 253 254 static int vmw_debugfs_gem_info_show(struct seq_file *m, void *unused) 255 { 256 struct vmw_private *vdev = (struct vmw_private *)m->private; 257 struct drm_device *dev = &vdev->drm; 258 struct drm_file *file; 259 int r; 260 261 r = mutex_lock_interruptible(&dev->filelist_mutex); 262 if (r) 263 return r; 264 265 list_for_each_entry(file, &dev->filelist, lhead) { 266 struct task_struct *task; 267 struct drm_gem_object *gobj; 268 struct pid *pid; 269 int id; 270 271 /* 272 * Although we have a valid reference on file->pid, that does 273 * not guarantee that the task_struct who called get_pid() is 274 * still alive (e.g. get_pid(current) => fork() => exit()). 275 * Therefore, we need to protect this ->comm access using RCU. 276 */ 277 rcu_read_lock(); 278 pid = rcu_dereference(file->pid); 279 task = pid_task(pid, PIDTYPE_TGID); 280 seq_printf(m, "pid %8d command %s:\n", pid_nr(pid), 281 task ? task->comm : "<unknown>"); 282 rcu_read_unlock(); 283 284 spin_lock(&file->table_lock); 285 idr_for_each_entry(&file->object_idr, gobj, id) { 286 struct vmw_bo *bo = to_vmw_bo(gobj); 287 288 vmw_bo_print_info(id, bo, m); 289 } 290 spin_unlock(&file->table_lock); 291 } 292 293 mutex_unlock(&dev->filelist_mutex); 294 return 0; 295 } 296 297 DEFINE_SHOW_ATTRIBUTE(vmw_debugfs_gem_info); 298 299 #endif 300 301 void vmw_debugfs_gem_init(struct vmw_private *vdev) 302 { 303 #if defined(CONFIG_DEBUG_FS) 304 struct drm_minor *minor = vdev->drm.primary; 305 struct dentry *root = minor->debugfs_root; 306 307 debugfs_create_file("vmwgfx_gem_info", 0444, root, vdev, 308 &vmw_debugfs_gem_info_fops); 309 #endif 310 } 311