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