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include/drm/drm_os_linux.h
3.94 KB
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/** * \file drm_os_linux.h * OS abstraction macros. */ |
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#include <linux/interrupt.h> /* For task queue support */ #include <linux/delay.h> |
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#ifndef readq |
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static inline u64 readq(void __iomem *reg) |
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{ return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32); } |
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static inline void writeq(u64 val, void __iomem *reg) |
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{ writel(val & 0xffffffff, reg); writel(val >> 32, reg + 0x4UL); } #endif |
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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) /** 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 */ |
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/** Read a qword from a MMIO region - be careful using these unless you really understand them */ #define DRM_READ64(map, offset) readq(((void __iomem *)(map)->handle) + (offset)) /** Write a qword into a MMIO region */ #define DRM_WRITE64(map, offset, val) writeq(val, ((void __iomem *)(map)->handle) + (offset)) |
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#define DRM_READMEMORYBARRIER() rmb() /** Write memory barrier */ #define DRM_WRITEMEMORYBARRIER() wmb() /** Read/write memory barrier */ #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 */ #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 { |
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unsigned long aper_base; unsigned long aper_size; |
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}; #define DRM_AGP_MEM int #define DRM_AGP_KERN struct no_agp_kern #endif #if !(__OS_HAS_MTRR) |
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static __inline__ int mtrr_add(unsigned long base, unsigned long size, unsigned int type, char increment) |
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{ return -ENODEV; } |
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static __inline__ int mtrr_del(int reg, unsigned long base, unsigned long size) |
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{ return -ENODEV; } |
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#define MTRR_TYPE_WRCOMB 1 #endif |
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/** 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 */ |
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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) #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) |
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#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) |
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#define DRM_WAKEUP( queue ) wake_up( queue ) |
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#define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue ) |