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
vmw_gem_object_free(struct drm_gem_object * gobj)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
vmw_gem_object_open(struct drm_gem_object * obj,struct drm_file * file_priv)40 static int vmw_gem_object_open(struct drm_gem_object *obj,
41 struct drm_file *file_priv)
42 {
43 return 0;
44 }
45
vmw_gem_object_close(struct drm_gem_object * obj,struct drm_file * file_priv)46 static void vmw_gem_object_close(struct drm_gem_object *obj,
47 struct drm_file *file_priv)
48 {
49 }
50
vmw_gem_pin_private(struct drm_gem_object * obj,bool do_pin)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
vmw_gem_object_pin(struct drm_gem_object * obj)70 static int vmw_gem_object_pin(struct drm_gem_object *obj)
71 {
72 return vmw_gem_pin_private(obj, true);
73 }
74
vmw_gem_object_unpin(struct drm_gem_object * obj)75 static void vmw_gem_object_unpin(struct drm_gem_object *obj)
76 {
77 vmw_gem_pin_private(obj, false);
78 }
79
vmw_gem_object_get_sg_table(struct drm_gem_object * obj)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
vmw_gem_object_create(struct vmw_private * vmw,struct vmw_bo_params * params,struct vmw_bo ** p_vbo)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
vmw_gem_object_create_with_handle(struct vmw_private * dev_priv,struct drm_file * filp,uint32_t size,uint32_t * handle,struct vmw_bo ** p_vbo)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
vmw_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * table)152 struct drm_gem_object *vmw_prime_import_sg_table(struct drm_device *dev,
153 struct dma_buf_attachment *attach,
154 struct sg_table *table)
155 {
156 int ret;
157 struct vmw_private *dev_priv = vmw_priv(dev);
158 struct drm_gem_object *gem = NULL;
159 struct vmw_bo *vbo;
160 struct vmw_bo_params params = {
161 .domain = (dev_priv->has_mob) ? VMW_BO_DOMAIN_SYS : VMW_BO_DOMAIN_VRAM,
162 .busy_domain = VMW_BO_DOMAIN_SYS,
163 .bo_type = ttm_bo_type_sg,
164 .size = attach->dmabuf->size,
165 .pin = false,
166 .keep_resv = true,
167 .resv = attach->dmabuf->resv,
168 .sg = table,
169
170 };
171
172 dma_resv_lock(params.resv, NULL);
173
174 ret = vmw_bo_create(dev_priv, ¶ms, &vbo);
175 if (ret != 0)
176 goto out_no_bo;
177
178 vbo->tbo.base.funcs = &vmw_gem_object_funcs;
179
180 gem = &vbo->tbo.base;
181 out_no_bo:
182 dma_resv_unlock(params.resv);
183 return gem;
184 }
185
vmw_gem_object_create_ioctl(struct drm_device * dev,void * data,struct drm_file * filp)186 int vmw_gem_object_create_ioctl(struct drm_device *dev, void *data,
187 struct drm_file *filp)
188 {
189 struct vmw_private *dev_priv = vmw_priv(dev);
190 union drm_vmw_alloc_dmabuf_arg *arg =
191 (union drm_vmw_alloc_dmabuf_arg *)data;
192 struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
193 struct drm_vmw_dmabuf_rep *rep = &arg->rep;
194 struct vmw_bo *vbo;
195 uint32_t handle;
196 int ret;
197
198 ret = vmw_gem_object_create_with_handle(dev_priv, filp,
199 req->size, &handle, &vbo);
200 if (ret)
201 goto out_no_bo;
202
203 rep->handle = handle;
204 rep->map_handle = drm_vma_node_offset_addr(&vbo->tbo.base.vma_node);
205 rep->cur_gmr_id = handle;
206 rep->cur_gmr_offset = 0;
207 /* drop reference from allocate - handle holds it now */
208 drm_gem_object_put(&vbo->tbo.base);
209 out_no_bo:
210 return ret;
211 }
212
213 #if defined(CONFIG_DEBUG_FS)
214
vmw_bo_print_info(int id,struct vmw_bo * bo,struct seq_file * m)215 static void vmw_bo_print_info(int id, struct vmw_bo *bo, struct seq_file *m)
216 {
217 const char *placement;
218 const char *type;
219
220 switch (bo->tbo.resource->mem_type) {
221 case TTM_PL_SYSTEM:
222 placement = " CPU";
223 break;
224 case VMW_PL_GMR:
225 placement = " GMR";
226 break;
227 case VMW_PL_MOB:
228 placement = " MOB";
229 break;
230 case VMW_PL_SYSTEM:
231 placement = "VCPU";
232 break;
233 case TTM_PL_VRAM:
234 placement = "VRAM";
235 break;
236 default:
237 placement = "None";
238 break;
239 }
240
241 switch (bo->tbo.type) {
242 case ttm_bo_type_device:
243 type = "device";
244 break;
245 case ttm_bo_type_kernel:
246 type = "kernel";
247 break;
248 case ttm_bo_type_sg:
249 type = "sg ";
250 break;
251 default:
252 type = "none ";
253 break;
254 }
255
256 seq_printf(m, "\t\t0x%08x: %12zu bytes %s, type = %s",
257 id, bo->tbo.base.size, placement, type);
258 seq_printf(m, ", priority = %u, pin_count = %u, GEM refs = %d, TTM refs = %d",
259 bo->tbo.priority,
260 bo->tbo.pin_count,
261 kref_read(&bo->tbo.base.refcount),
262 kref_read(&bo->tbo.kref));
263 seq_puts(m, "\n");
264 }
265
vmw_debugfs_gem_info_show(struct seq_file * m,void * unused)266 static int vmw_debugfs_gem_info_show(struct seq_file *m, void *unused)
267 {
268 struct vmw_private *vdev = (struct vmw_private *)m->private;
269 struct drm_device *dev = &vdev->drm;
270 struct drm_file *file;
271 int r;
272
273 r = mutex_lock_interruptible(&dev->filelist_mutex);
274 if (r)
275 return r;
276
277 list_for_each_entry(file, &dev->filelist, lhead) {
278 struct task_struct *task;
279 struct drm_gem_object *gobj;
280 struct pid *pid;
281 int id;
282
283 /*
284 * Although we have a valid reference on file->pid, that does
285 * not guarantee that the task_struct who called get_pid() is
286 * still alive (e.g. get_pid(current) => fork() => exit()).
287 * Therefore, we need to protect this ->comm access using RCU.
288 */
289 rcu_read_lock();
290 pid = rcu_dereference(file->pid);
291 task = pid_task(pid, PIDTYPE_TGID);
292 seq_printf(m, "pid %8d command %s:\n", pid_nr(pid),
293 task ? task->comm : "<unknown>");
294 rcu_read_unlock();
295
296 spin_lock(&file->table_lock);
297 idr_for_each_entry(&file->object_idr, gobj, id) {
298 struct vmw_bo *bo = to_vmw_bo(gobj);
299
300 vmw_bo_print_info(id, bo, m);
301 }
302 spin_unlock(&file->table_lock);
303 }
304
305 mutex_unlock(&dev->filelist_mutex);
306 return 0;
307 }
308
309 DEFINE_SHOW_ATTRIBUTE(vmw_debugfs_gem_info);
310
311 #endif
312
vmw_debugfs_gem_init(struct vmw_private * vdev)313 void vmw_debugfs_gem_init(struct vmw_private *vdev)
314 {
315 #if defined(CONFIG_DEBUG_FS)
316 struct drm_minor *minor = vdev->drm.primary;
317 struct dentry *root = minor->debugfs_root;
318
319 debugfs_create_file("vmwgfx_gem_info", 0444, root, vdev,
320 &vmw_debugfs_gem_info_fops);
321 #endif
322 }
323