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
33static 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
40static int vmw_gem_object_open(struct drm_gem_object *obj,
41 struct drm_file *file_priv)
42{
43 return 0;
44}
45
46static void vmw_gem_object_close(struct drm_gem_object *obj,
47 struct drm_file *file_priv)
48{
49}
50
51static 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(gobj: obj);
55 int ret;
56
57 ret = ttm_bo_reserve(bo, interruptible: false, no_wait: false, NULL);
58 if (unlikely(ret != 0))
59 goto err;
60
61 vmw_bo_pin_reserved(bo: vbo, pin: do_pin);
62
63 ttm_bo_unreserve(bo);
64
65err:
66 return ret;
67}
68
69
70static int vmw_gem_object_pin(struct drm_gem_object *obj)
71{
72 return vmw_gem_pin_private(obj, do_pin: true);
73}
74
75static void vmw_gem_object_unpin(struct drm_gem_object *obj)
76{
77 vmw_gem_pin_private(obj, do_pin: false);
78}
79
80static 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(dev: obj->dev, pages: vmw_tt->dma_ttm.pages, nr_pages: vmw_tt->dma_ttm.num_pages);
90}
91
92static 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
100static 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
114int 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(dev_priv: vmw, params, p_bo: p_vbo);
119
120 if (ret != 0)
121 goto out_no_bo;
122
123 (*p_vbo)->tbo.base.funcs = &vmw_gem_object_funcs;
124out_no_bo:
125 return ret;
126}
127
128int 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(vmw: dev_priv, params: &params, p_vbo);
144 if (ret != 0)
145 goto out_no_bo;
146
147 ret = drm_gem_handle_create(file_priv: filp, obj: &(*p_vbo)->tbo.base, handlep: handle);
148out_no_bo:
149 return ret;
150}
151
152struct 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 .resv = attach->dmabuf->resv,
167 .sg = table,
168
169 };
170
171 dma_resv_lock(obj: params.resv, NULL);
172
173 ret = vmw_bo_create(dev_priv, params: &params, p_bo: &vbo);
174 if (ret != 0)
175 goto out_no_bo;
176
177 vbo->tbo.base.funcs = &vmw_gem_object_funcs;
178
179 gem = &vbo->tbo.base;
180out_no_bo:
181 dma_resv_unlock(obj: params.resv);
182 return gem;
183}
184
185int vmw_gem_object_create_ioctl(struct drm_device *dev, void *data,
186 struct drm_file *filp)
187{
188 struct vmw_private *dev_priv = vmw_priv(dev);
189 union drm_vmw_alloc_dmabuf_arg *arg =
190 (union drm_vmw_alloc_dmabuf_arg *)data;
191 struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
192 struct drm_vmw_dmabuf_rep *rep = &arg->rep;
193 struct vmw_bo *vbo;
194 uint32_t handle;
195 int ret;
196
197 ret = vmw_gem_object_create_with_handle(dev_priv, filp,
198 size: req->size, handle: &handle, p_vbo: &vbo);
199 if (ret)
200 goto out_no_bo;
201
202 rep->handle = handle;
203 rep->map_handle = drm_vma_node_offset_addr(node: &vbo->tbo.base.vma_node);
204 rep->cur_gmr_id = handle;
205 rep->cur_gmr_offset = 0;
206 /* drop reference from allocate - handle holds it now */
207 drm_gem_object_put(obj: &vbo->tbo.base);
208out_no_bo:
209 return ret;
210}
211
212#if defined(CONFIG_DEBUG_FS)
213
214static void vmw_bo_print_info(int id, struct vmw_bo *bo, struct seq_file *m)
215{
216 const char *placement;
217 const char *type;
218
219 switch (bo->tbo.resource->mem_type) {
220 case TTM_PL_SYSTEM:
221 placement = " CPU";
222 break;
223 case VMW_PL_GMR:
224 placement = " GMR";
225 break;
226 case VMW_PL_MOB:
227 placement = " MOB";
228 break;
229 case VMW_PL_SYSTEM:
230 placement = "VCPU";
231 break;
232 case TTM_PL_VRAM:
233 placement = "VRAM";
234 break;
235 default:
236 placement = "None";
237 break;
238 }
239
240 switch (bo->tbo.type) {
241 case ttm_bo_type_device:
242 type = "device";
243 break;
244 case ttm_bo_type_kernel:
245 type = "kernel";
246 break;
247 case ttm_bo_type_sg:
248 type = "sg ";
249 break;
250 default:
251 type = "none ";
252 break;
253 }
254
255 seq_printf(m, fmt: "\t\t0x%08x: %12zu bytes %s, type = %s",
256 id, bo->tbo.base.size, placement, type);
257 seq_printf(m, fmt: ", priority = %u, pin_count = %u, GEM refs = %d, TTM refs = %d",
258 bo->tbo.priority,
259 bo->tbo.pin_count,
260 kref_read(kref: &bo->tbo.base.refcount),
261 kref_read(kref: &bo->tbo.kref));
262 seq_puts(m, s: "\n");
263}
264
265static int vmw_debugfs_gem_info_show(struct seq_file *m, void *unused)
266{
267 struct vmw_private *vdev = (struct vmw_private *)m->private;
268 struct drm_device *dev = &vdev->drm;
269 struct drm_file *file;
270 int r;
271
272 r = mutex_lock_interruptible(&dev->filelist_mutex);
273 if (r)
274 return r;
275
276 list_for_each_entry(file, &dev->filelist, lhead) {
277 struct task_struct *task;
278 struct drm_gem_object *gobj;
279 struct pid *pid;
280 int id;
281
282 /*
283 * Although we have a valid reference on file->pid, that does
284 * not guarantee that the task_struct who called get_pid() is
285 * still alive (e.g. get_pid(current) => fork() => exit()).
286 * Therefore, we need to protect this ->comm access using RCU.
287 */
288 rcu_read_lock();
289 pid = rcu_dereference(file->pid);
290 task = pid_task(pid, PIDTYPE_TGID);
291 seq_printf(m, fmt: "pid %8d command %s:\n", pid_nr(pid),
292 task ? task->comm : "<unknown>");
293 rcu_read_unlock();
294
295 spin_lock(lock: &file->table_lock);
296 idr_for_each_entry(&file->object_idr, gobj, id) {
297 struct vmw_bo *bo = to_vmw_bo(gobj);
298
299 vmw_bo_print_info(id, bo, m);
300 }
301 spin_unlock(lock: &file->table_lock);
302 }
303
304 mutex_unlock(lock: &dev->filelist_mutex);
305 return 0;
306}
307
308DEFINE_SHOW_ATTRIBUTE(vmw_debugfs_gem_info);
309
310#endif
311
312void vmw_debugfs_gem_init(struct vmw_private *vdev)
313{
314#if defined(CONFIG_DEBUG_FS)
315 struct drm_minor *minor = vdev->drm.primary;
316 struct dentry *root = minor->debugfs_root;
317
318 debugfs_create_file(name: "vmwgfx_gem_info", mode: 0444, parent: root, data: vdev,
319 fops: &vmw_debugfs_gem_info_fops);
320#endif
321}
322

source code of linux/drivers/gpu/drm/vmwgfx/vmwgfx_gem.c