linux-core/drm_os_linux.h

   1 #define __NO_VERSION__
   2
   3 #include <linux/interrupt.h>    /* For task queue support */
   4 #include <linux/delay.h>
   5
   6 #define DRMFILE                         struct file *
   7 #define DRM_IOCTL_ARGS                  struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data
   8 #define DRM_ERR(d)                      -(d)
   9 #define DRM_CURRENTPID                  current->pid
  10 #define DRM_UDELAY(d)                   udelay(d)
  11 #define DRM_READ8(map, offset)          readb(((unsigned long)(map)->handle) + (offset))
  12 #define DRM_READ32(map, offset)         readl(((unsigned long)(map)->handle) + (offset))
  13 #define DRM_WRITE8(map, offset, val)    writeb(val, ((unsigned long)(map)->handle) + (offset))
  14 #define DRM_WRITE32(map, offset, val)   writel(val, ((unsigned long)(map)->handle) + (offset))
  15 #define DRM_READMEMORYBARRIER(map)      mb()
  16 #define DRM_WRITEMEMORYBARRIER(map)     wmb()
  17 #define DRM_DEVICE      drm_file_t      *priv   = filp->private_data; \
  18                         drm_device_t    *dev    = priv->dev
  19
  20 #define DRM_IRQ_ARGS            int irq, void *arg, struct pt_regs *regs
  21 #define DRM_TASKQUEUE_ARGS      void *arg
  22
  23 /* For data going from/to the kernel through the ioctl argument */
  24 #define DRM_COPY_FROM_USER_IOCTL(arg1, arg2, arg3)      \
  25         if ( copy_from_user(&arg1, arg2, arg3) )        \
  26                 return -EFAULT
  27 #define DRM_COPY_TO_USER_IOCTL(arg1, arg2, arg3)        \
  28         if ( copy_to_user(arg1, &arg2, arg3) )          \
  29                 return -EFAULT
  30 /* Other copying of data from/to kernel space */
  31 #define DRM_COPY_FROM_USER(arg1, arg2, arg3)            \
  32         copy_from_user(arg1, arg2, arg3)
  33 #define DRM_COPY_TO_USER(arg1, arg2, arg3)              \
  34         copy_to_user(arg1, arg2, arg3)
  35 /* Macros for copyfrom user, but checking readability only once */
  36 #define DRM_VERIFYAREA_READ( uaddr, size )              \
  37         verify_area( VERIFY_READ, uaddr, size )
  38 #define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3)  \
  39         __copy_from_user(arg1, arg2, arg3)
  40 #define DRM_GET_USER_UNCHECKED(val, uaddr)              \
  41         __get_user(val, uaddr)
  42
  43
  44 /* malloc/free without the overhead of DRM(alloc) */
  45 #define DRM_MALLOC(x) kmalloc(x, GFP_KERNEL)
  46 #define DRM_FREE(x,size) kfree(x)
  47
  48 #define DRM_GETSAREA()                                                   \
  49 do {                                                                     \
  50         drm_map_list_t *entry;                                           \
  51         list_for_each_entry( entry, &dev->maplist->head, head ) {        \
  52                 if ( entry->map &&                                       \
  53                      entry->map->type == _DRM_SHM &&                     \
  54                      (entry->map->flags & _DRM_CONTAINS_LOCK) ) {        \
  55                         dev_priv->sarea = entry->map;                    \
  56                         break;                                           \
  57                 }                                                        \
  58         }                                                                \
  59 } while (0)
  60
  61 #define DRM_HZ HZ
  62
  63 #define DRM_WAIT_ON( ret, queue, timeout, condition )           \
  64 do {                                                            \
  65         DECLARE_WAITQUEUE(entry, current);                      \
  66         unsigned long end = jiffies + (timeout);                \
  67         add_wait_queue(&(queue), &entry);                       \
  68                                                                 \
  69         for (;;) {                                              \
  70                 current->state = TASK_INTERRUPTIBLE;            \
  71                 if (condition)                                  \
  72                         break;                                  \
  73                 if((signed)(end - jiffies) <= 0) {              \
  74                         ret = -EBUSY;                           \
  75                         break;                                  \
  76                 }                                               \
  77                 schedule_timeout((HZ/100 > 1) ? HZ/100 : 1);    \
  78                 if (signal_pending(current)) {                  \
  79                         ret = -EINTR;                           \
  80                         break;                                  \
  81                 }                                               \
  82         }                                                       \
  83         current->state = TASK_RUNNING;                          \
  84         remove_wait_queue(&(queue), &entry);                    \
  85 } while (0)
  86
  87
  88 #define DRM_WAKEUP( queue ) wake_up_interruptible( queue )
  89 #define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue )
  90