linux/drm_os_linux.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117

/**
 * \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))
/** Read memory barrier */
#define DRM_READMEMORYBARRIER()		rmb()
/** Write memory barrier */
#define DRM_WRITEMEMORYBARRIER()	wmb()
/** Read/write memory barrier */
#define DRM_MEMORYBARRIER()		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 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 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 ) 		\
	verify_area( VERIFY_READ, uaddr, size )
#define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3) 	\
	__copy_from_user(arg1, arg2, arg3)
#define DRM_GET_USER_UNCHECKED(val, uaddr)		\
	__get_user(val, uaddr)


/** '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;						 \
	list_for_each_entry( entry, &dev->maplist->head, head ) {	 \