drivers/gpu/drm/vmwgfx/vmwgfx_gem.c

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