include/drm/drmP.h

   1 /*
   2  * Internal Header for the Direct Rendering Manager
   3  *
   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.
   7  * All rights reserved.
   8  *
   9  * Author: Rickard E. (Rik) Faith <faith@valinux.com>
  10  * Author: Gareth Hughes <gareth@valinux.com>
  11  *
  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:
  18  *
  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
  21  * Software.
  22  *
  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.
  30  */
  31
  32 #ifndef _DRM_P_H_
  33 #define _DRM_P_H_
  34
  35 #include <linux/agp_backend.h>
  36 #include <linux/cdev.h>
  37 #include <linux/dma-mapping.h>
  38 #include <linux/file.h>
  39 #include <linux/fs.h>
  40 #include <linux/highmem.h>
  41 #include <linux/idr.h>
  42 #include <linux/init.h>
  43 #include <linux/io.h>
  44 #include <linux/jiffies.h>
  45 #include <linux/kernel.h>
  46 #include <linux/kref.h>
  47 #include <linux/miscdevice.h>
  48 #include <linux/mm.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>
  60
  61 #include <asm/mman.h>
  62 #include <asm/pgalloc.h>
  63 #include <linux/uaccess.h>
  64
  65 #include <uapi/drm/drm.h>
  66 #include <uapi/drm/drm_mode.h>
  67
  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>
  83 #include <drm/drm_vblank.h>
  84 #include <drm/drm_irq.h>
  85 #include <drm/drm_device.h>
  86
  87 struct module;
  88
  89 struct device_node;
  90 struct videomode;
  91 struct reservation_object;
  92 struct dma_buf_attachment;
  93
  94 struct pci_dev;
  95 struct pci_controller;
  96
  97 /*
  98  * The following categories are defined:
  99  *
 100  * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
 101  *       This is the category used by the DRM_DEBUG() macro.
 102  *
 103  * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
 104  *         This is the category used by the DRM_DEBUG_DRIVER() macro.
 105  *
 106  * KMS: used in the modesetting code.
 107  *      This is the category used by the DRM_DEBUG_KMS() macro.
 108  *
 109  * PRIME: used in the prime code.
 110  *        This is the category used by the DRM_DEBUG_PRIME() macro.
 111  *
 112  * ATOMIC: used in the atomic code.
 113  *        This is the category used by the DRM_DEBUG_ATOMIC() macro.
 114  *
 115  * VBL: used for verbose debug message in the vblank code
 116  *        This is the category used by the DRM_DEBUG_VBL() macro.
 117  *
 118  * Enabling verbose debug messages is done through the drm.debug parameter,
 119  * each category being enabled by a bit.
 120  *
 121  * drm.debug=0x1 will enable CORE messages
 122  * drm.debug=0x2 will enable DRIVER messages
 123  * drm.debug=0x3 will enable CORE and DRIVER messages
 124  * ...
 125  * drm.debug=0x3f will enable all messages
 126  *
 127  * An interesting feature is that it's possible to enable verbose logging at
 128  * run-time by echoing the debug value in its sysfs node:
 129  *   # echo 0xf > /sys/module/drm/parameters/debug
 130  */
 131 #define DRM_UT_NONE             0x00
 132 #define DRM_UT_CORE             0x01
 133 #define DRM_UT_DRIVER           0x02
 134 #define DRM_UT_KMS              0x04
 135 #define DRM_UT_PRIME            0x08
 136 #define DRM_UT_ATOMIC           0x10
 137 #define DRM_UT_VBL              0x20
 138 #define DRM_UT_STATE            0x40
 139
 140 /***********************************************************************/
 141 /** \name DRM template customization defaults */
 142 /*@{*/
 143
 144 /***********************************************************************/
 145 /** \name Macros to make printk easier */
 146 /*@{*/
 147
 148 #define _DRM_PRINTK(once, level, fmt, ...)                              \
 149         do {                                                            \
 150                 printk##once(KERN_##level "[" DRM_NAME "] " fmt,        \
 151                              ##__VA_ARGS__);                            \
 152         } while (0)
 153
 154 #define DRM_INFO(fmt, ...)                                              \
 155         _DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
 156 #define DRM_NOTE(fmt, ...)                                              \
 157         _DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
 158 #define DRM_WARN(fmt, ...)                                              \
 159         _DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
 160
 161 #define DRM_INFO_ONCE(fmt, ...)                                         \
 162         _DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
 163 #define DRM_NOTE_ONCE(fmt, ...)                                         \
 164         _DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
 165 #define DRM_WARN_ONCE(fmt, ...)                                         \
 166         _DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
 167
 168 /**
 169  * Error output.
 170  *
 171  * \param fmt printf() like format string.
 172  * \param arg arguments
 173  */
 174 #define DRM_DEV_ERROR(dev, fmt, ...)                                    \
 175         drm_dev_printk(dev, KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*",\
 176                        fmt, ##__VA_ARGS__)
 177 #define DRM_ERROR(fmt, ...)                                             \
 178         drm_printk(KERN_ERR, DRM_UT_NONE, fmt,  ##__VA_ARGS__)
 179
 180 /**
 181  * Rate limited error output.  Like DRM_ERROR() but won't flood the log.
 182  *
 183  * \param fmt printf() like format string.
 184  * \param arg arguments
 185  */
 186 #define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...)                        \
 187 ({                                                                      \
 188         static DEFINE_RATELIMIT_STATE(_rs,                              \
 189                                       DEFAULT_RATELIMIT_INTERVAL,       \
 190                                       DEFAULT_RATELIMIT_BURST);         \
 191                                                                         \
 192         if (__ratelimit(&_rs))                                          \
 193                 DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__);                 \
 194 })
 195 #define DRM_ERROR_RATELIMITED(fmt, ...)                                 \
 196         DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
 197
 198 #define DRM_DEV_INFO(dev, fmt, ...)                                     \
 199         drm_dev_printk(dev, KERN_INFO, DRM_UT_NONE, __func__, "", fmt,  \
 200                        ##__VA_ARGS__)
 201
 202 #define DRM_DEV_INFO_ONCE(dev, fmt, ...)                                \
 203 ({                                                                      \
 204         static bool __print_once __read_mostly;                         \
 205         if (!__print_once) {                                            \
 206                 __print_once = true;                                    \
 207                 DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__);                  \
 208         }                                                               \
 209 })
 210
 211 /**
 212  * Debug output.
 213  *
 214  * \param fmt printf() like format string.
 215  * \param arg arguments
 216  */
 217 #define DRM_DEV_DEBUG(dev, fmt, args...)                                \
 218         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt, \
 219                        ##args)
 220 #define DRM_DEBUG(fmt, ...)                                             \
 221         drm_printk(KERN_DEBUG, DRM_UT_CORE, fmt, ##__VA_ARGS__)
 222
 223 #define DRM_DEV_DEBUG_DRIVER(dev, fmt, args...)                         \
 224         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_DRIVER, __func__, "",    \
 225                        fmt, ##args)
 226 #define DRM_DEBUG_DRIVER(fmt, ...)                                      \
 227         drm_printk(KERN_DEBUG, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
 228
 229 #define DRM_DEV_DEBUG_KMS(dev, fmt, args...)                            \
 230         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt,  \
 231                        ##args)
 232 #define DRM_DEBUG_KMS(fmt, ...)                                 \
 233         drm_printk(KERN_DEBUG, DRM_UT_KMS, fmt, ##__VA_ARGS__)
 234
 235 #define DRM_DEV_DEBUG_PRIME(dev, fmt, args...)                          \
 236         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_PRIME, __func__, "",     \
 237                        fmt, ##args)
 238 #define DRM_DEBUG_PRIME(fmt, ...)                                       \
 239         drm_printk(KERN_DEBUG, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
 240
 241 #define DRM_DEV_DEBUG_ATOMIC(dev, fmt, args...)                         \
 242         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ATOMIC, __func__, "",    \
 243                        fmt, ##args)
 244 #define DRM_DEBUG_ATOMIC(fmt, ...)                                      \
 245         drm_printk(KERN_DEBUG, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
 246
 247 #define DRM_DEV_DEBUG_VBL(dev, fmt, args...)                            \
 248         drm_dev_printk(dev, KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt,  \
 249                        ##args)
 250 #define DRM_DEBUG_VBL(fmt, ...)                                 \
 251         drm_printk(KERN_DEBUG, DRM_UT_VBL, fmt, ##__VA_ARGS__)
 252
 253 #define _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, level, fmt, args...)     \
 254 ({                                                                      \
 255         static DEFINE_RATELIMIT_STATE(_rs,                              \
 256                                       DEFAULT_RATELIMIT_INTERVAL,       \
 257                                       DEFAULT_RATELIMIT_BURST);         \
 258         if (__ratelimit(&_rs))                                          \
 259                 drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ ## level,       \
 260                                __func__, "", fmt, ##args);              \
 261 })
 262
 263 /**
 264  * Rate limited debug output. Like DRM_DEBUG() but won't flood the log.
 265  *
 266  * \param fmt printf() like format string.
 267  * \param arg arguments
 268  */
 269 #define DRM_DEV_DEBUG_RATELIMITED(dev, fmt, args...)                    \
 270         DEV__DRM_DEFINE_DEBUG_RATELIMITED(dev, CORE, fmt, ##args)
 271 #define DRM_DEBUG_RATELIMITED(fmt, args...)                             \
 272         DRM_DEV_DEBUG_RATELIMITED(NULL, fmt, ##args)
 273 #define DRM_DEV_DEBUG_DRIVER_RATELIMITED(dev, fmt, args...)             \
 274         _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, DRIVER, fmt, ##args)
 275 #define DRM_DEBUG_DRIVER_RATELIMITED(fmt, args...)                      \
 276         DRM_DEV_DEBUG_DRIVER_RATELIMITED(NULL, fmt, ##args)
 277 #define DRM_DEV_DEBUG_KMS_RATELIMITED(dev, fmt, args...)                \
 278         _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, KMS, fmt, ##args)
 279 #define DRM_DEBUG_KMS_RATELIMITED(fmt, args...)                         \
 280         DRM_DEV_DEBUG_KMS_RATELIMITED(NULL, fmt, ##args)
 281 #define DRM_DEV_DEBUG_PRIME_RATELIMITED(dev, fmt, args...)              \
 282         _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, PRIME, fmt, ##args)
 283 #define DRM_DEBUG_PRIME_RATELIMITED(fmt, args...)                       \
 284         DRM_DEV_DEBUG_PRIME_RATELIMITED(NULL, fmt, ##args)
 285
 286 /* Format strings and argument splitters to simplify printing
 287  * various "complex" objects
 288  */
 289
 290 /*@}*/
 291
 292 /***********************************************************************/
 293 /** \name Internal types and structures */
 294 /*@{*/
 295
 296 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
 297
 298
 299 /**
 300  * drm_drv_uses_atomic_modeset - check if the driver implements
 301  * atomic_commit()
 302  * @dev: DRM device
 303  *
 304  * This check is useful if drivers do not have DRIVER_ATOMIC set but
 305  * have atomic modesetting internally implemented.
 306  */
 307 static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev)
 308 {
 309         return dev->mode_config.funcs->atomic_commit != NULL;
 310 }
 311
 312 #define DRM_SWITCH_POWER_ON 0
 313 #define DRM_SWITCH_POWER_OFF 1
 314 #define DRM_SWITCH_POWER_CHANGING 2
 315 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
 316
 317 static __inline__ int drm_core_check_feature(struct drm_device *dev,
 318                                              int feature)
 319 {
 320         return ((dev->driver->driver_features & feature) ? 1 : 0);
 321 }
 322
 323 /******************************************************************/
 324 /** \name Internal function definitions */
 325 /*@{*/
 326
 327                                 /* Driver support (drm_drv.h) */
 328
 329 /*
 330  * These are exported to drivers so that they can implement fencing using
 331  * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
 332  */
 333
 334 /*@}*/
 335
 336 /* returns true if currently okay to sleep */
 337 static __inline__ bool drm_can_sleep(void)
 338 {
 339         if (in_atomic() || in_dbg_master() || irqs_disabled())
 340                 return false;
 341         return true;
 342 }
 343
 344 /* helper for handling conditionals in various for_each macros */
 345 #define for_each_if(condition) if (!(condition)) {} else
 346
 347 #endif