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(addr)                 readb(addr)
  11 #define DRM_READ32(addr)                readl(addr)
  12 #define DRM_WRITE8(addr, val)           writeb(val, addr)
  13 #define DRM_WRITE32(addr, val)          writel(val, addr)
  14 #define DRM_READMEMORYBARRIER()         mb()
  15 #define DRM_WRITEMEMORYBARRIER()        wmb()
  16 #define DRM_DEVICE      drm_file_t      *priv   = filp->private_data; \
  17                         drm_device_t    *dev    = priv->dev
  18
  19 /* For data going from/to the kernel through the ioctl argument */
  20 #define DRM_COPY_FROM_USER_IOCTL(arg1, arg2, arg3)      \
  21         if ( copy_from_user(&arg1, arg2, arg3) )        \
  22                 return -EFAULT
  23 #define DRM_COPY_TO_USER_IOCTL(arg1, arg2, arg3)        \
  24         if ( copy_to_user(arg1, &arg2, arg3) )          \
  25                 return -EFAULT
  26 /* Other copying of data from/to kernel space */
  27 #define DRM_COPY_FROM_USER(arg1, arg2, arg3)            \
  28         copy_from_user(arg1, arg2, arg3)
  29 #define DRM_COPY_TO_USER(arg1, arg2, arg3)              \
  30         copy_to_user(arg1, arg2, arg3)
  31 /* Macros for copyfrom user, but checking readability only once */
  32 #define DRM_VERIFYAREA_READ( uaddr, size )              \
  33         verify_area( VERIFY_READ, uaddr, size )
  34 #define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3)  \
  35         __copy_from_user(arg1, arg2, arg3)
  36 #define DRM_GET_USER_UNCHECKED(val, uaddr)              \
  37         __get_user(val, uaddr)
  38
  39
  40 /* malloc/free without the overhead of DRM(alloc) */
  41 #define DRM_MALLOC(x) kmalloc(x, GFP_KERNEL)
  42 #define DRM_FREE(x) kfree(x)
  43
  44 #define DRM_GETSAREA()                                                           \
  45 do {                                                                             \
  46         struct list_head *list;                                                  \
  47         list_for_each( list, &dev->maplist->head ) {                             \
  48                 drm_map_list_t *entry = (drm_map_list_t *)list;                  \
  49                 if ( entry->map &&                                               \
  50                      entry->map->type == _DRM_SHM &&                             \
  51                      (entry->map->flags & _DRM_CONTAINS_LOCK) ) {                \
  52                         dev_priv->sarea = entry->map;                            \
  53                         break;                                                   \
  54                 }                                                                \
  55         }                                                                        \
  56 } while (0)