2 * Internal Header for the Direct Rendering Manager
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
6 * Copyright (c) 2009-2010, Code Aurora Forum.
9 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
10 * Author: Gareth Hughes <gareth@valinux.com>
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
19 * The above copyright notice and this permission notice (including the next
20 * paragraph) shall be included in all copies or substantial portions of the
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
27 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
28 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
29 * OTHER DEALINGS IN THE SOFTWARE.
35 #include <linux/agp_backend.h>
36 #include <linux/cdev.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/file.h>
40 #include <linux/highmem.h>
41 #include <linux/idr.h>
42 #include <linux/init.h>
44 #include <linux/jiffies.h>
45 #include <linux/kernel.h>
46 #include <linux/kref.h>
47 #include <linux/miscdevice.h>
49 #include <linux/mutex.h>
50 #include <linux/platform_device.h>
51 #include <linux/poll.h>
52 #include <linux/ratelimit.h>
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/types.h>
56 #include <linux/vmalloc.h>
57 #include <linux/workqueue.h>
58 #include <linux/dma-fence.h>
59 #include <linux/module.h>
62 #include <asm/pgalloc.h>
63 #include <linux/uaccess.h>
65 #include <uapi/drm/drm.h>
66 #include <uapi/drm/drm_mode.h>
68 #include <drm/drm_agpsupport.h>
69 #include <drm/drm_crtc.h>
70 #include <drm/drm_fourcc.h>
71 #include <drm/drm_global.h>
72 #include <drm/drm_hashtab.h>
73 #include <drm/drm_mm.h>
74 #include <drm/drm_os_linux.h>
75 #include <drm/drm_sarea.h>
76 #include <drm/drm_drv.h>
77 #include <drm/drm_prime.h>
78 #include <drm/drm_pci.h>
79 #include <drm/drm_file.h>
80 #include <drm/drm_debugfs.h>
81 #include <drm/drm_ioctl.h>
82 #include <drm/drm_sysfs.h>
89 struct drm_device_dma;
90 struct drm_gem_object;
92 struct drm_vblank_crtc;
93 struct drm_vma_offset_manager;
97 struct reservation_object;
98 struct dma_buf_attachment;
101 struct pci_controller;
104 * The following categories are defined:
106 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
107 * This is the category used by the DRM_DEBUG() macro.
109 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
110 * This is the category used by the DRM_DEBUG_DRIVER() macro.
112 * KMS: used in the modesetting code.
113 * This is the category used by the DRM_DEBUG_KMS() macro.
115 * PRIME: used in the prime code.
116 * This is the category used by the DRM_DEBUG_PRIME() macro.
118 * ATOMIC: used in the atomic code.
119 * This is the category used by the DRM_DEBUG_ATOMIC() macro.
121 * VBL: used for verbose debug message in the vblank code
122 * This is the category used by the DRM_DEBUG_VBL() macro.
124 * Enabling verbose debug messages is done through the drm.debug parameter,
125 * each category being enabled by a bit.
127 * drm.debug=0x1 will enable CORE messages
128 * drm.debug=0x2 will enable DRIVER messages
129 * drm.debug=0x3 will enable CORE and DRIVER messages
131 * drm.debug=0x3f will enable all messages
133 * An interesting feature is that it's possible to enable verbose logging at
134 * run-time by echoing the debug value in its sysfs node:
135 * # echo 0xf > /sys/module/drm/parameters/debug
137 #define DRM_UT_NONE 0x00
138 #define DRM_UT_CORE 0x01
139 #define DRM_UT_DRIVER 0x02
140 #define DRM_UT_KMS 0x04
141 #define DRM_UT_PRIME 0x08
142 #define DRM_UT_ATOMIC 0x10
143 #define DRM_UT_VBL 0x20
144 #define DRM_UT_STATE 0x40
146 /***********************************************************************/
147 /** \name DRM template customization defaults */
150 /***********************************************************************/
151 /** \name Macros to make printk easier */
154 #define _DRM_PRINTK(once, level, fmt, ...) \
156 printk##once(KERN_##level "[" DRM_NAME "] " fmt, \
160 #define DRM_INFO(fmt, ...) \
161 _DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
162 #define DRM_NOTE(fmt, ...) \
163 _DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
164 #define DRM_WARN(fmt, ...) \
165 _DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
167 #define DRM_INFO_ONCE(fmt, ...) \
168 _DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
169 #define DRM_NOTE_ONCE(fmt, ...) \
170 _DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
171 #define DRM_WARN_ONCE(fmt, ...) \
172 _DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
177 * \param fmt printf() like format string.
178 * \param arg arguments
180 #define DRM_DEV_ERROR(dev, fmt, ...) \
181 drm_dev_printk(dev, KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*",\
183 #define DRM_ERROR(fmt, ...) \
184 drm_printk(KERN_ERR, DRM_UT_NONE, fmt, ##__VA_ARGS__)
187 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
189 * \param fmt printf() like format string.
190 * \param arg arguments
192 #define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...) \
194 static DEFINE_RATELIMIT_STATE(_rs, \
195 DEFAULT_RATELIMIT_INTERVAL, \
196 DEFAULT_RATELIMIT_BURST); \
198 if (__ratelimit(&_rs)) \
199 DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__); \
201 #define DRM_ERROR_RATELIMITED(fmt, ...) \
202 DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
204 #define DRM_DEV_INFO(dev, fmt, ...) \
205 drm_dev_printk(dev, KERN_INFO, DRM_UT_NONE, __func__, "", fmt, \
208 #define DRM_DEV_INFO_ONCE(dev, fmt, ...) \
210 static bool __print_once __read_mostly; \
211 if (!__print_once) { \
212 __print_once = true; \
213 DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__); \
220 * \param fmt printf() like format string.
221 * \param arg arguments
223 #define DRM_DEV_DEBUG(dev, fmt, args...) \
224 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt, \
226 #define DRM_DEBUG(fmt, ...) \
227 drm_printk(KERN_DEBUG, DRM_UT_CORE, fmt, ##__VA_ARGS__)
229 #define DRM_DEV_DEBUG_DRIVER(dev, fmt, args...) \
230 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_DRIVER, __func__, "", \
232 #define DRM_DEBUG_DRIVER(fmt, ...) \
233 drm_printk(KERN_DEBUG, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
235 #define DRM_DEV_DEBUG_KMS(dev, fmt, args...) \
236 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt, \
238 #define DRM_DEBUG_KMS(fmt, ...) \
239 drm_printk(KERN_DEBUG, DRM_UT_KMS, fmt, ##__VA_ARGS__)
241 #define DRM_DEV_DEBUG_PRIME(dev, fmt, args...) \
242 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_PRIME, __func__, "", \
244 #define DRM_DEBUG_PRIME(fmt, ...) \
245 drm_printk(KERN_DEBUG, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
247 #define DRM_DEV_DEBUG_ATOMIC(dev, fmt, args...) \
248 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ATOMIC, __func__, "", \
250 #define DRM_DEBUG_ATOMIC(fmt, ...) \
251 drm_printk(KERN_DEBUG, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
253 #define DRM_DEV_DEBUG_VBL(dev, fmt, args...) \
254 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt, \
256 #define DRM_DEBUG_VBL(fmt, ...) \
257 drm_printk(KERN_DEBUG, DRM_UT_VBL, fmt, ##__VA_ARGS__)
259 #define _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, level, fmt, args...) \
261 static DEFINE_RATELIMIT_STATE(_rs, \
262 DEFAULT_RATELIMIT_INTERVAL, \
263 DEFAULT_RATELIMIT_BURST); \
264 if (__ratelimit(&_rs)) \
265 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ ## level, \
266 __func__, "", fmt, ##args); \
270 * Rate limited debug output. Like DRM_DEBUG() but won't flood the log.
272 * \param fmt printf() like format string.
273 * \param arg arguments
275 #define DRM_DEV_DEBUG_RATELIMITED(dev, fmt, args...) \
276 DEV__DRM_DEFINE_DEBUG_RATELIMITED(dev, CORE, fmt, ##args)
277 #define DRM_DEBUG_RATELIMITED(fmt, args...) \
278 DRM_DEV_DEBUG_RATELIMITED(NULL, fmt, ##args)
279 #define DRM_DEV_DEBUG_DRIVER_RATELIMITED(dev, fmt, args...) \
280 _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, DRIVER, fmt, ##args)
281 #define DRM_DEBUG_DRIVER_RATELIMITED(fmt, args...) \
282 DRM_DEV_DEBUG_DRIVER_RATELIMITED(NULL, fmt, ##args)
283 #define DRM_DEV_DEBUG_KMS_RATELIMITED(dev, fmt, args...) \
284 _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, KMS, fmt, ##args)
285 #define DRM_DEBUG_KMS_RATELIMITED(fmt, args...) \
286 DRM_DEV_DEBUG_KMS_RATELIMITED(NULL, fmt, ##args)
287 #define DRM_DEV_DEBUG_PRIME_RATELIMITED(dev, fmt, args...) \
288 _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, PRIME, fmt, ##args)
289 #define DRM_DEBUG_PRIME_RATELIMITED(fmt, args...) \
290 DRM_DEV_DEBUG_PRIME_RATELIMITED(NULL, fmt, ##args)
292 /* Format strings and argument splitters to simplify printing
293 * various "complex" objects
298 /***********************************************************************/
299 /** \name Internal types and structures */
302 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
306 * DRM device structure. This structure represent a complete card that
307 * may contain multiple heads.
310 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
311 int if_version; /**< Highest interface version set */
313 /** \name Lifetime Management */
315 struct kref ref; /**< Object ref-count */
316 struct device *dev; /**< Device structure of bus-device */
317 struct drm_driver *driver; /**< DRM driver managing the device */
318 void *dev_private; /**< DRM driver private data */
319 struct drm_minor *control; /**< Control node */
320 struct drm_minor *primary; /**< Primary node */
321 struct drm_minor *render; /**< Render node */
324 /* currently active master for this device. Protected by master_mutex */
325 struct drm_master *master;
327 atomic_t unplugged; /**< Flag whether dev is dead */
328 struct inode *anon_inode; /**< inode for private address-space */
329 char *unique; /**< unique name of the device */
334 struct mutex struct_mutex; /**< For others */
335 struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
338 /** \name Usage Counters */
340 int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
341 spinlock_t buf_lock; /**< For drm_device::buf_use and a few other things. */
342 int buf_use; /**< Buffers in use -- cannot alloc */
343 atomic_t buf_alloc; /**< Buffer allocation in progress */
346 struct mutex filelist_mutex;
347 struct list_head filelist;
349 /** \name Memory management */
351 struct list_head maplist; /**< Linked list of regions */
352 struct drm_open_hash map_hash; /**< User token hash table for maps */
354 /** \name Context handle management */
356 struct list_head ctxlist; /**< Linked list of context handles */
357 struct mutex ctxlist_mutex; /**< For ctxlist */
361 struct list_head vmalist; /**< List of vmas (for debugging) */
365 /** \name DMA support */
367 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
370 /** \name Context support */
373 __volatile__ long context_flag; /**< Context swapping flag */
374 int last_context; /**< Last current context */
377 /** \name VBLANK IRQ support */
383 * If true, vblank interrupt will be disabled immediately when the
384 * refcount drops to zero, as opposed to via the vblank disable
386 * This can be set to true it the hardware has a working vblank
387 * counter and the driver uses drm_vblank_on() and drm_vblank_off()
390 bool vblank_disable_immediate;
392 /* array of size num_crtcs */
393 struct drm_vblank_crtc *vblank;
395 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
398 u32 max_vblank_count; /**< size of vblank counter register */
403 struct list_head vblank_event_list;
404 spinlock_t event_lock;
408 struct drm_agp_head *agp; /**< AGP data */
410 struct pci_dev *pdev; /**< PCI device structure */
412 struct pci_controller *hose;
415 struct drm_sg_mem *sg; /**< Scatter gather memory */
416 unsigned int num_crtcs; /**< Number of CRTCs on this device */
420 struct drm_hw_lock *lock;
423 struct drm_local_map *agp_buffer_map;
424 unsigned int agp_buffer_token;
426 struct drm_mode_config mode_config; /**< Current mode config */
428 /** \name GEM information */
430 struct mutex object_name_lock;
431 struct idr object_name_idr;
432 struct drm_vma_offset_manager *vma_offset_manager;
434 int switch_power_state;
438 * drm_drv_uses_atomic_modeset - check if the driver implements
442 * This check is useful if drivers do not have DRIVER_ATOMIC set but
443 * have atomic modesetting internally implemented.
445 static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev)
447 return dev->mode_config.funcs->atomic_commit != NULL;
450 #include <drm/drm_irq.h>
452 #define DRM_SWITCH_POWER_ON 0
453 #define DRM_SWITCH_POWER_OFF 1
454 #define DRM_SWITCH_POWER_CHANGING 2
455 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
457 static __inline__ int drm_core_check_feature(struct drm_device *dev,
460 return ((dev->driver->driver_features & feature) ? 1 : 0);
463 static inline void drm_device_set_unplugged(struct drm_device *dev)
466 atomic_set(&dev->unplugged, 1);
469 static inline int drm_device_is_unplugged(struct drm_device *dev)
471 int ret = atomic_read(&dev->unplugged);
476 /******************************************************************/
477 /** \name Internal function definitions */
480 /* Driver support (drm_drv.h) */
483 * These are exported to drivers so that they can implement fencing using
484 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
489 /* returns true if currently okay to sleep */
490 static __inline__ bool drm_can_sleep(void)
492 if (in_atomic() || in_dbg_master() || irqs_disabled())
497 /* helper for handling conditionals in various for_each macros */
498 #define for_each_if(condition) if (!(condition)) {} else