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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(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
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, true);
73}
74
75static void vmw_gem_object_unpin(struct drm_gem_object *obj)
76{
77 vmw_gem_pin_private(obj, 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(obj->dev, vmw_tt->dma_ttm.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(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;
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(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);
148out_no_bo:
149 return ret;
150}
151
152
153int 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);
176out_no_bo:
177 return ret;
178}
179
180#if defined(CONFIG_DEBUG_FS)
181
182static 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
233static 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
276DEFINE_SHOW_ATTRIBUTE(vmw_debugfs_gem_info);
277
278#endif
279
280void 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}