diff options
Diffstat (limited to 'drivers/char/drm/drm_os_linux.h')
| -rw-r--r-- | drivers/char/drm/drm_os_linux.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/drivers/char/drm/drm_os_linux.h b/drivers/char/drm/drm_os_linux.h new file mode 100644 index 000000000000..b14cd370dea5 --- /dev/null +++ b/drivers/char/drm/drm_os_linux.h @@ -0,0 +1,149 @@ +/** + * \file drm_os_linux.h + * OS abstraction macros. + */ + + +#include <linux/interrupt.h> /* For task queue support */ +#include <linux/delay.h> + +/** File pointer type */ +#define DRMFILE struct file * +/** Ioctl arguments */ +#define DRM_IOCTL_ARGS struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data +#define DRM_ERR(d) -(d) +/** Current process ID */ +#define DRM_CURRENTPID current->pid +#define DRM_UDELAY(d) udelay(d) +/** Read a byte from a MMIO region */ +#define DRM_READ8(map, offset) readb(((void __iomem *)(map)->handle) + (offset)) +/** Read a word from a MMIO region */ +#define DRM_READ16(map, offset) readw(((void __iomem *)(map)->handle) + (offset)) +/** Read a dword from a MMIO region */ +#define DRM_READ32(map, offset) readl(((void __iomem *)(map)->handle) + (offset)) +/** Write a byte into a MMIO region */ +#define DRM_WRITE8(map, offset, val) writeb(val, ((void __iomem *)(map)->handle) + (offset)) +/** Write a word into a MMIO region */ +#define DRM_WRITE16(map, offset, val) writew(val, ((void __iomem *)(map)->handle) + (offset)) +/** Write a dword into a MMIO region */ +#define DRM_WRITE32(map, offset, val) writel(val, ((void __iomem *)(map)->handle) + (offset)) +/** Read memory barrier */ +#define DRM_READMEMORYBARRIER() rmb() +/** Write memory barrier */ +#define DRM_WRITEMEMORYBARRIER() wmb() +/** Read/write memory barrier */ +#define DRM_MEMORYBARRIER() mb() +/** DRM device local declaration */ +#define DRM_DEVICE drm_file_t *priv = filp->private_data; \ + drm_device_t *dev = priv->head->dev + +/** IRQ handler arguments and return type and values */ +#define DRM_IRQ_ARGS int irq, void *arg, struct pt_regs *regs + +/** AGP types */ +#if __OS_HAS_AGP +#define DRM_AGP_MEM struct agp_memory +#define DRM_AGP_KERN struct agp_kern_info +#else +/* define some dummy types for non AGP supporting kernels */ +struct no_agp_kern { + unsigned long aper_base; + unsigned long aper_size; +}; +#define DRM_AGP_MEM int +#define DRM_AGP_KERN struct no_agp_kern +#endif + +#if !(__OS_HAS_MTRR) +static __inline__ int mtrr_add (unsigned long base, unsigned long size, + unsigned int type, char increment) +{ + return -ENODEV; +} + +static __inline__ int mtrr_del (int reg, unsigned long base, + unsigned long size) +{ + return -ENODEV; +} +#define MTRR_TYPE_WRCOMB 1 + +#endif + +/** Task queue handler arguments */ +#define DRM_TASKQUEUE_ARGS void *arg + +/** For data going into the kernel through the ioctl argument */ +#define DRM_COPY_FROM_USER_IOCTL(arg1, arg2, arg3) \ + if ( copy_from_user(&arg1, arg2, arg3) ) \ + return -EFAULT +/** For data going from the kernel through the ioctl argument */ +#define DRM_COPY_TO_USER_IOCTL(arg1, arg2, arg3) \ + if ( copy_to_user(arg1, &arg2, arg3) ) \ + return -EFAULT +/** Other copying of data to kernel space */ +#define DRM_COPY_FROM_USER(arg1, arg2, arg3) \ + copy_from_user(arg1, arg2, arg3) +/** Other copying of data from kernel space */ +#define DRM_COPY_TO_USER(arg1, arg2, arg3) \ + copy_to_user(arg1, arg2, arg3) +/* Macros for copyfrom user, but checking readability only once */ +#define DRM_VERIFYAREA_READ( uaddr, size ) \ + (access_ok( VERIFY_READ, uaddr, size ) ? 0 : -EFAULT) +#define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3) \ + __copy_from_user(arg1, arg2, arg3) +#define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3) \ + __copy_to_user(arg1, arg2, arg3) +#define DRM_GET_USER_UNCHECKED(val, uaddr) \ + __get_user(val, uaddr) + +#define DRM_GET_PRIV_WITH_RETURN(_priv, _filp) _priv = _filp->private_data + +/** + * Get the pointer to the SAREA. + * + * Searches the SAREA on the mapping lists and points drm_device::sarea to it. + */ +#define DRM_GETSAREA() \ +do { \ + drm_map_list_t *entry; \ + list_for_each_entry( entry, &dev->maplist->head, head ) { \ + if ( entry->map && \ + entry->map->type == _DRM_SHM && \ + (entry->map->flags & _DRM_CONTAINS_LOCK) ) { \ + dev_priv->sarea = entry->map; \ + break; \ + } \ + } \ +} while (0) + +#define DRM_HZ HZ + +#define DRM_WAIT_ON( ret, queue, timeout, condition ) \ +do { \ + DECLARE_WAITQUEUE(entry, current); \ + unsigned long end = jiffies + (timeout); \ + add_wait_queue(&(queue), &entry); \ + \ + for (;;) { \ + __set_current_state(TASK_INTERRUPTIBLE); \ + if (condition) \ + break; \ + if (time_after_eq(jiffies, end)) { \ + ret = -EBUSY; \ + break; \ + } \ + schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \ + if (signal_pending(current)) { \ + ret = -EINTR; \ + break; \ + } \ + } \ + __set_current_state(TASK_RUNNING); \ + remove_wait_queue(&(queue), &entry); \ +} while (0) + + +#define DRM_WAKEUP( queue ) wake_up_interruptible( queue ) +#define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue ) + |