diff options
Diffstat (limited to 'linux/drm_os_linux.h')
| -rw-r--r-- | linux/drm_os_linux.h | 40 |
1 files changed, 33 insertions, 7 deletions
diff --git a/linux/drm_os_linux.h b/linux/drm_os_linux.h index e804399a..c5cb65f1 100644 --- a/linux/drm_os_linux.h +++ b/linux/drm_os_linux.h @@ -1,36 +1,56 @@ +/** + * \file drm_os_linux.h + * OS abstraction macros. + */ + #define __NO_VERSION__ #include <linux/interrupt.h> /* For task queue support */ #include <linux/delay.h> +/** File pointer type */ #define DRMFILE struct file * +/** Ioctl arguments */ #define DRM_IOCTL_ARGS struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data #define DRM_ERR(d) -(d) +/** Current process ID */ #define DRM_CURRENTPID current->pid #define DRM_UDELAY(d) udelay(d) +/** Read a byte from a MMIO region */ #define DRM_READ8(map, offset) readb(((unsigned long)(map)->handle) + (offset)) +/** Read a dword from a MMIO region */ #define DRM_READ32(map, offset) readl(((unsigned long)(map)->handle) + (offset)) +/** Write a byte into a MMIO region */ #define DRM_WRITE8(map, offset, val) writeb(val, ((unsigned long)(map)->handle) + (offset)) +/** Write a dword into a MMIO region */ #define DRM_WRITE32(map, offset, val) writel(val, ((unsigned long)(map)->handle) + (offset)) -#define DRM_READMEMORYBARRIER() rmb() -#define DRM_WRITEMEMORYBARRIER() wmb() -#define DRM_MEMORYBARRIER() mb() +/** Read memory barrier */ +#define DRM_READMEMORYBARRIER(map) rmb() +/** Write memory barrier */ +#define DRM_WRITEMEMORYBARRIER(map) wmb() +/** Read/write memory barrier */ +#define DRM_MEMORYBARRIER(map) mb() +/** DRM device local declaration */ #define DRM_DEVICE drm_file_t *priv = filp->private_data; \ drm_device_t *dev = priv->dev - + +/** IRQ handler arguments */ #define DRM_IRQ_ARGS int irq, void *arg, struct pt_regs *regs +/** Task queue handler arguments */ #define DRM_TASKQUEUE_ARGS void *arg -/* For data going from/to the kernel through the ioctl argument */ +/** 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 from/to kernel space */ +/** 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 */ @@ -42,10 +62,16 @@ __get_user(val, uaddr) -/* malloc/free without the overhead of DRM(alloc) */ +/** 'malloc' without the overhead of DRM(alloc)() */ #define DRM_MALLOC(x) kmalloc(x, GFP_KERNEL) +/** 'free' without the overhead of DRM(free)() */ #define DRM_FREE(x,size) kfree(x) +/** + * Get the pointer to the SAREA. + * + * Searches the SAREA on the mapping lists and points drm_device::sarea to it. + */ #define DRM_GETSAREA() \ do { \ drm_map_list_t *entry; \ |