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 000000000000..8dbd2572b7c3
--- /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 )