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 DRM_IOCTL_ARGS                  struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data
   7 #define DRM_ERR(d)                      -(d)
   8 #define DRM_CURRENTPID                  current->pid
   9 #define DRM_UDELAY(d)                   udelay(d)
  10 #define DRM_READ8(map, offset)          readb(((unsigned long)(map)->handle) + (offset))
  11 #define DRM_READ32(map, offset)         readl(((unsigned long)(map)->handle) + (offset))
  12 #define DRM_WRITE8(map, offset, val)    writeb(val, ((unsigned long)(map)->handle) + (offset))
  13 #define DRM_WRITE32(map, offset, val)   writel(val, ((unsigned long)(map)->handle) + (offset))
  14 #define DRM_READMEMORYBARRIER(map)      mb()
  15 #define DRM_WRITEMEMORYBARRIER(map)     wmb()
  16 #define DRM_DEVICE      drm_file_t      *priv   = filp->private_data; \
  17                         drm_device_t    *dev    = priv->dev
  18
  19 #define DRM_IRQ_ARGS            int irq, void *arg, struct pt_regs *regs
  20 #define DRM_TASKQUEUE_ARGS      void *arg
  21
  22 /* For data going from/to the kernel through the ioctl argument */
  23 #define DRM_COPY_FROM_USER_IOCTL(arg1, arg2, arg3)      \
  24         if ( copy_from_user(&arg1, arg2, arg3) )        \
  25                 return -EFAULT
  26 #define DRM_COPY_TO_USER_IOCTL(arg1, arg2, arg3)        \
  27         if ( copy_to_user(arg1, &arg2, arg3) )          \
  28                 return -EFAULT
  29 /* Other copying of data from/to kernel space */
  30 #define DRM_COPY_FROM_USER(arg1, arg2, arg3)            \
  31         copy_from_user(arg1, arg2, arg3)
  32 #define DRM_COPY_TO_USER(arg1, arg2, arg3)              \
  33         copy_to_user(arg1, arg2, arg3)
  34 /* Macros for copyfrom user, but checking readability only once */
  35 #define DRM_VERIFYAREA_READ( uaddr, size )              \
  36         verify_area( VERIFY_READ, uaddr, size )
  37 #define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3)  \
  38         __copy_from_user(arg1, arg2, arg3)
  39 #define DRM_GET_USER_UNCHECKED(val, uaddr)              \
  40         __get_user(val, uaddr)
  41
  42
  43 /* malloc/free without the overhead of DRM(alloc) */
  44 #define DRM_MALLOC(x) kmalloc(x, GFP_KERNEL)
  45 #define DRM_FREE(x) kfree(x)
  46
  47 #define DRM_GETSAREA()                                                   \
  48 do {                                                                     \
  49         struct list_head *list;                                          \
  50         list_for_each( list, &dev->maplist->head ) {                     \
  51                 drm_map_list_t *entry = (drm_map_list_t *)list;          \
  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