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6#include <linux/list.h>
7#include <linux/module.h>
8#include <linux/mutex.h>
9#include <linux/seq_file.h>
10#include <linux/slab.h>
11
12#include <drm/drm_client.h>
13#include <drm/drm_debugfs.h>
14#include <drm/drm_device.h>
15#include <drm/drm_drv.h>
16#include <drm/drm_file.h>
17#include <drm/drm_fourcc.h>
18#include <drm/drm_gem.h>
19#include <drm/drm_mode.h>
20#include <drm/drm_print.h>
21#include <drm/drmP.h>
22
23#include "drm_crtc_internal.h"
24#include "drm_internal.h"
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34
35static int drm_client_open(struct drm_client_dev *client)
36{
37 struct drm_device *dev = client->dev;
38 struct drm_file *file;
39
40 file = drm_file_alloc(dev->primary);
41 if (IS_ERR(file))
42 return PTR_ERR(file);
43
44 mutex_lock(&dev->filelist_mutex);
45 list_add(&file->lhead, &dev->filelist_internal);
46 mutex_unlock(&dev->filelist_mutex);
47
48 client->file = file;
49
50 return 0;
51}
52
53static void drm_client_close(struct drm_client_dev *client)
54{
55 struct drm_device *dev = client->dev;
56
57 mutex_lock(&dev->filelist_mutex);
58 list_del(&client->file->lhead);
59 mutex_unlock(&dev->filelist_mutex);
60
61 drm_file_free(client->file);
62}
63EXPORT_SYMBOL(drm_client_close);
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78
79int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
80 const char *name, const struct drm_client_funcs *funcs)
81{
82 int ret;
83
84 if (!drm_core_check_feature(dev, DRIVER_MODESET) || !dev->driver->dumb_create)
85 return -EOPNOTSUPP;
86
87 if (funcs && !try_module_get(funcs->owner))
88 return -ENODEV;
89
90 client->dev = dev;
91 client->name = name;
92 client->funcs = funcs;
93
94 ret = drm_client_open(client);
95 if (ret)
96 goto err_put_module;
97
98 drm_dev_get(dev);
99
100 return 0;
101
102err_put_module:
103 if (funcs)
104 module_put(funcs->owner);
105
106 return ret;
107}
108EXPORT_SYMBOL(drm_client_init);
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119
120void drm_client_add(struct drm_client_dev *client)
121{
122 struct drm_device *dev = client->dev;
123
124 mutex_lock(&dev->clientlist_mutex);
125 list_add(&client->list, &dev->clientlist);
126 mutex_unlock(&dev->clientlist_mutex);
127}
128EXPORT_SYMBOL(drm_client_add);
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143
144void drm_client_release(struct drm_client_dev *client)
145{
146 struct drm_device *dev = client->dev;
147
148 DRM_DEV_DEBUG_KMS(dev->dev, "%s\n", client->name);
149
150 drm_client_close(client);
151 drm_dev_put(dev);
152 if (client->funcs)
153 module_put(client->funcs->owner);
154}
155EXPORT_SYMBOL(drm_client_release);
156
157void drm_client_dev_unregister(struct drm_device *dev)
158{
159 struct drm_client_dev *client, *tmp;
160
161 if (!drm_core_check_feature(dev, DRIVER_MODESET))
162 return;
163
164 mutex_lock(&dev->clientlist_mutex);
165 list_for_each_entry_safe(client, tmp, &dev->clientlist, list) {
166 list_del(&client->list);
167 if (client->funcs && client->funcs->unregister) {
168 client->funcs->unregister(client);
169 } else {
170 drm_client_release(client);
171 kfree(client);
172 }
173 }
174 mutex_unlock(&dev->clientlist_mutex);
175}
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185
186void drm_client_dev_hotplug(struct drm_device *dev)
187{
188 struct drm_client_dev *client;
189 int ret;
190
191 if (!drm_core_check_feature(dev, DRIVER_MODESET))
192 return;
193
194 mutex_lock(&dev->clientlist_mutex);
195 list_for_each_entry(client, &dev->clientlist, list) {
196 if (!client->funcs || !client->funcs->hotplug)
197 continue;
198
199 ret = client->funcs->hotplug(client);
200 DRM_DEV_DEBUG_KMS(dev->dev, "%s: ret=%d\n", client->name, ret);
201 }
202 mutex_unlock(&dev->clientlist_mutex);
203}
204EXPORT_SYMBOL(drm_client_dev_hotplug);
205
206void drm_client_dev_restore(struct drm_device *dev)
207{
208 struct drm_client_dev *client;
209 int ret;
210
211 if (!drm_core_check_feature(dev, DRIVER_MODESET))
212 return;
213
214 mutex_lock(&dev->clientlist_mutex);
215 list_for_each_entry(client, &dev->clientlist, list) {
216 if (!client->funcs || !client->funcs->restore)
217 continue;
218
219 ret = client->funcs->restore(client);
220 DRM_DEV_DEBUG_KMS(dev->dev, "%s: ret=%d\n", client->name, ret);
221 if (!ret)
222 break;
223 }
224 mutex_unlock(&dev->clientlist_mutex);
225}
226
227static void drm_client_buffer_delete(struct drm_client_buffer *buffer)
228{
229 struct drm_device *dev = buffer->client->dev;
230
231 drm_gem_vunmap(buffer->gem, buffer->vaddr);
232
233 if (buffer->gem)
234 drm_gem_object_put_unlocked(buffer->gem);
235
236 if (buffer->handle)
237 drm_mode_destroy_dumb(dev, buffer->handle, buffer->client->file);
238
239 kfree(buffer);
240}
241
242static struct drm_client_buffer *
243drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format)
244{
245 struct drm_mode_create_dumb dumb_args = { };
246 struct drm_device *dev = client->dev;
247 struct drm_client_buffer *buffer;
248 struct drm_gem_object *obj;
249 void *vaddr;
250 int ret;
251
252 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
253 if (!buffer)
254 return ERR_PTR(-ENOMEM);
255
256 buffer->client = client;
257
258 dumb_args.width = width;
259 dumb_args.height = height;
260 dumb_args.bpp = drm_format_plane_cpp(format, 0) * 8;
261 ret = drm_mode_create_dumb(dev, &dumb_args, client->file);
262 if (ret)
263 goto err_delete;
264
265 buffer->handle = dumb_args.handle;
266 buffer->pitch = dumb_args.pitch;
267
268 obj = drm_gem_object_lookup(client->file, dumb_args.handle);
269 if (!obj) {
270 ret = -ENOENT;
271 goto err_delete;
272 }
273
274 buffer->gem = obj;
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284 vaddr = drm_gem_vmap(obj);
285 if (IS_ERR(vaddr)) {
286 ret = PTR_ERR(vaddr);
287 goto err_delete;
288 }
289
290 buffer->vaddr = vaddr;
291
292 return buffer;
293
294err_delete:
295 drm_client_buffer_delete(buffer);
296
297 return ERR_PTR(ret);
298}
299
300static void drm_client_buffer_rmfb(struct drm_client_buffer *buffer)
301{
302 int ret;
303
304 if (!buffer->fb)
305 return;
306
307 ret = drm_mode_rmfb(buffer->client->dev, buffer->fb->base.id, buffer->client->file);
308 if (ret)
309 DRM_DEV_ERROR(buffer->client->dev->dev,
310 "Error removing FB:%u (%d)\n", buffer->fb->base.id, ret);
311
312 buffer->fb = NULL;
313}
314
315static int drm_client_buffer_addfb(struct drm_client_buffer *buffer,
316 u32 width, u32 height, u32 format)
317{
318 struct drm_client_dev *client = buffer->client;
319 struct drm_mode_fb_cmd fb_req = { };
320 const struct drm_format_info *info;
321 int ret;
322
323 info = drm_format_info(format);
324 fb_req.bpp = info->cpp[0] * 8;
325 fb_req.depth = info->depth;
326 fb_req.width = width;
327 fb_req.height = height;
328 fb_req.handle = buffer->handle;
329 fb_req.pitch = buffer->pitch;
330
331 ret = drm_mode_addfb(client->dev, &fb_req, client->file);
332 if (ret)
333 return ret;
334
335 buffer->fb = drm_framebuffer_lookup(client->dev, buffer->client->file, fb_req.fb_id);
336 if (WARN_ON(!buffer->fb))
337 return -ENOENT;
338
339
340 drm_framebuffer_put(buffer->fb);
341
342 strscpy(buffer->fb->comm, client->name, TASK_COMM_LEN);
343
344 return 0;
345}
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361struct drm_client_buffer *
362drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format)
363{
364 struct drm_client_buffer *buffer;
365 int ret;
366
367 buffer = drm_client_buffer_create(client, width, height, format);
368 if (IS_ERR(buffer))
369 return buffer;
370
371 ret = drm_client_buffer_addfb(buffer, width, height, format);
372 if (ret) {
373 drm_client_buffer_delete(buffer);
374 return ERR_PTR(ret);
375 }
376
377 return buffer;
378}
379EXPORT_SYMBOL(drm_client_framebuffer_create);
380
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384
385void drm_client_framebuffer_delete(struct drm_client_buffer *buffer)
386{
387 if (!buffer)
388 return;
389
390 drm_client_buffer_rmfb(buffer);
391 drm_client_buffer_delete(buffer);
392}
393EXPORT_SYMBOL(drm_client_framebuffer_delete);
394
395#ifdef CONFIG_DEBUG_FS
396static int drm_client_debugfs_internal_clients(struct seq_file *m, void *data)
397{
398 struct drm_info_node *node = m->private;
399 struct drm_device *dev = node->minor->dev;
400 struct drm_printer p = drm_seq_file_printer(m);
401 struct drm_client_dev *client;
402
403 mutex_lock(&dev->clientlist_mutex);
404 list_for_each_entry(client, &dev->clientlist, list)
405 drm_printf(&p, "%s\n", client->name);
406 mutex_unlock(&dev->clientlist_mutex);
407
408 return 0;
409}
410
411static const struct drm_info_list drm_client_debugfs_list[] = {
412 { "internal_clients", drm_client_debugfs_internal_clients, 0 },
413};
414
415int drm_client_debugfs_init(struct drm_minor *minor)
416{
417 return drm_debugfs_create_files(drm_client_debugfs_list,
418 ARRAY_SIZE(drm_client_debugfs_list),
419 minor->debugfs_root, minor);
420}
421#endif
422