3 * OS abstraction macros.
6 #include <linux/interrupt.h> /* For task queue support */
7 #include <linux/delay.h>
9 /** File pointer type */
10 #define DRMFILE struct file *
11 /** Ioctl arguments */
12 #define DRM_IOCTL_ARGS struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data
13 /** Current process ID */
14 #define DRM_CURRENTPID current->pid
15 #define DRM_SUSER(p) capable(CAP_SYS_ADMIN)
16 #define DRM_UDELAY(d) udelay(d)
17 #if LINUX_VERSION_CODE <= 0x020608 /* KERNEL_VERSION(2,6,8) */
21 /** Read a byte from a MMIO region */
22 #define DRM_READ8(map, offset) readb(((void __iomem *)(map)->handle) + (offset))
23 /** Read a word from a MMIO region */
24 #define DRM_READ16(map, offset) readw(((void __iomem *)(map)->handle) + (offset))
25 /** Read a dword from a MMIO region */
26 #define DRM_READ32(map, offset) readl(((void __iomem *)(map)->handle) + (offset))
27 /** Write a byte into a MMIO region */
28 #define DRM_WRITE8(map, offset, val) writeb(val, ((void __iomem *)(map)->handle) + (offset))
29 /** Write a word into a MMIO region */
30 #define DRM_WRITE16(map, offset, val) writew(val, ((void __iomem *)(map)->handle) + (offset))
31 /** Write a dword into a MMIO region */
32 #define DRM_WRITE32(map, offset, val) writel(val, ((void __iomem *)(map)->handle) + (offset))
34 /** Read a byte from a MMIO region */
35 #define DRM_READ8(map, offset) readb((map)->handle + (offset))
36 /** Read a word from a MMIO region */
37 #define DRM_READ16(map, offset) readw((map)->handle + (offset))
38 /** Read a dword from a MMIO region */
39 #define DRM_READ32(map, offset) readl((map)->handle + (offset))
40 /** Write a byte into a MMIO region */
41 #define DRM_WRITE8(map, offset, val) writeb(val, (map)->handle + (offset))
42 /** Write a word into a MMIO region */
43 #define DRM_WRITE16(map, offset, val) writew(val, (map)->handle + (offset))
44 /** Write a dword into a MMIO region */
45 #define DRM_WRITE32(map, offset, val) writel(val, (map)->handle + (offset))
47 /** Read memory barrier */
48 #define DRM_READMEMORYBARRIER() rmb()
49 /** Write memory barrier */
50 #define DRM_WRITEMEMORYBARRIER() wmb()
51 /** Read/write memory barrier */
52 #define DRM_MEMORYBARRIER() mb()
53 /** DRM device local declaration */
54 #define DRM_DEVICE struct drm_file *priv = filp->private_data; \
55 struct drm_device *dev = priv->head->dev
57 /** IRQ handler arguments and return type and values */
58 #define DRM_IRQ_ARGS int irq, void *arg
59 /** backwards compatibility with old irq return values */
61 typedef void irqreturn_t;
62 #define IRQ_HANDLED /* nothing */
63 #define IRQ_NONE /* nothing */
68 #define DRM_AGP_MEM struct agp_memory
69 #define DRM_AGP_KERN struct agp_kern_info
71 /* define some dummy types for non AGP supporting kernels */
73 unsigned long aper_base;
74 unsigned long aper_size;
76 #define DRM_AGP_MEM int
77 #define DRM_AGP_KERN struct no_agp_kern
81 static __inline__ int mtrr_add(unsigned long base, unsigned long size,
82 unsigned int type, char increment)
87 static __inline__ int mtrr_del(int reg, unsigned long base, unsigned long size)
92 #define MTRR_TYPE_WRCOMB 1
95 /** For data going into the kernel through the ioctl argument */
96 #define DRM_COPY_FROM_USER_IOCTL(arg1, arg2, arg3) \
97 if ( copy_from_user(&arg1, arg2, arg3) ) \
99 /** For data going from the kernel through the ioctl argument */
100 #define DRM_COPY_TO_USER_IOCTL(arg1, arg2, arg3) \
101 if ( copy_to_user(arg1, &arg2, arg3) ) \
103 /** Other copying of data to kernel space */
104 #define DRM_COPY_FROM_USER(arg1, arg2, arg3) \
105 copy_from_user(arg1, arg2, arg3)
106 /** Other copying of data from kernel space */
107 #define DRM_COPY_TO_USER(arg1, arg2, arg3) \
108 copy_to_user(arg1, arg2, arg3)
109 /* Macros for copyfrom user, but checking readability only once */
110 #define DRM_VERIFYAREA_READ( uaddr, size ) \
111 (access_ok( VERIFY_READ, uaddr, size) ? 0 : -EFAULT)
112 #define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3) \
113 __copy_from_user(arg1, arg2, arg3)
114 #define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3) \
115 __copy_to_user(arg1, arg2, arg3)
116 #define DRM_GET_USER_UNCHECKED(val, uaddr) \
117 __get_user(val, uaddr)
119 #define DRM_GET_PRIV_WITH_RETURN(_priv, _filp) _priv = _filp->private_data
123 #define DRM_WAIT_ON( ret, queue, timeout, condition ) \
125 DECLARE_WAITQUEUE(entry, current); \
126 unsigned long end = jiffies + (timeout); \
127 add_wait_queue(&(queue), &entry); \
130 __set_current_state(TASK_INTERRUPTIBLE); \
133 if (time_after_eq(jiffies, end)) { \
137 schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \
138 if (signal_pending(current)) { \
143 __set_current_state(TASK_RUNNING); \
144 remove_wait_queue(&(queue), &entry); \
147 #define DRM_WAKEUP( queue ) wake_up_interruptible( queue )
148 #define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue )