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