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https://github.com/edk2-porting/linux-next.git
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c0e09200dc
With the coming of kernel based modesetting and the memory manager stuff, the everything in one directory approach was getting very ugly and starting to be unmanageable. This restructures the drm along the lines of other kernel components. It creates a drivers/gpu/drm directory and moves the hw drivers into subdirectores. It moves the includes into an include/drm, and sets up the unifdef for the userspace headers we should be exporting. Signed-off-by: Dave Airlie <airlied@redhat.com>
109 lines
3.4 KiB
C
109 lines
3.4 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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#include <linux/interrupt.h> /* For task queue support */
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#include <linux/delay.h>
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/** Current process ID */
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#define DRM_CURRENTPID task_pid_nr(current)
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#define DRM_SUSER(p) capable(CAP_SYS_ADMIN)
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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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/** IRQ handler arguments and return type and values */
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#define DRM_IRQ_ARGS int irq, void *arg
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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, 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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/** 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_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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