| /** |
| * \file drm_os_linux.h |
| * OS abstraction macros. |
| */ |
| |
| #include <linux/interrupt.h> /* For task queue support */ |
| #include <linux/delay.h> |
| |
| /** Ioctl arguments */ |
| #define DRM_IOCTL_ARGS struct inode *inode, struct drm_file *file_priv, unsigned int cmd, unsigned long data |
| /** Current process ID */ |
| #define DRM_CURRENTPID current->pid |
| #define DRM_SUSER(p) capable(CAP_SYS_ADMIN) |
| #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 struct drm_device *dev = file_priv->head->dev |
| |
| /** IRQ handler arguments and return type and values */ |
| #define DRM_IRQ_ARGS int irq, void *arg |
| |
| /** 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 |
| |
| /** 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_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 ) |