140 lines
4.4 KiB
C
140 lines
4.4 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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#define __NO_VERSION__
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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(((unsigned long)(map)->handle) + (offset))
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/** Read a dword from a MMIO region */
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#define DRM_READ32(map, offset) readl(((unsigned long)(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, ((unsigned long)(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, ((unsigned long)(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->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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/** backwards compatibility with old irq return values */
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#ifndef IRQ_HANDLED
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typedef void irqreturn_t;
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#define IRQ_HANDLED /* nothing */
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#define IRQ_NONE /* nothing */
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#endif
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/** AGP types */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,70)
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#define DRM_AGP_MEM agp_memory
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#define DRM_AGP_KERN agp_kern_info
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#else
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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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#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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verify_area( VERIFY_READ, uaddr, size )
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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_PUT_USER_UNCHECKED(uaddr, val) \
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__put_user(val, uaddr)
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/** 'malloc' without the overhead of DRM(alloc)() */
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#define DRM_MALLOC(x) kmalloc(x, GFP_KERNEL)
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/** 'free' without the overhead of DRM(free)() */
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#define DRM_FREE(x,size) kfree(x)
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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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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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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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