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-rw-r--r--include/drm/drm_os_linux.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/include/drm/drm_os_linux.h b/include/drm/drm_os_linux.h
new file mode 100644
index 0000000..8dbd257
--- /dev/null
+++ b/include/drm/drm_os_linux.h
@@ -0,0 +1,108 @@
+/**
+ * \file drm_os_linux.h
+ * OS abstraction macros.
+ */
+
+#include <linux/interrupt.h> /* For task queue support */
+#include <linux/delay.h>
+
+/** Current process ID */
+#define DRM_CURRENTPID task_pid_nr(current)
+#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()
+
+/** 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
+
+/** 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 )
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