blob: 26641e95e0a4be8cb0ce273c88eb65196bfe02af [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
2 * \file drm_os_linux.h
3 * OS abstraction macros.
4 */
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <linux/interrupt.h> /* For task queue support */
7#include <linux/delay.h>
8
Dave Airlie87f0da52009-02-26 10:12:10 +10009#ifndef readq
Dave Airlie522b5cc2009-03-31 15:14:39 +110010static inline u64 readq(void __iomem *reg)
Dave Airlie87f0da52009-02-26 10:12:10 +100011{
12 return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32);
13}
14
Dave Airlie522b5cc2009-03-31 15:14:39 +110015static inline void writeq(u64 val, void __iomem *reg)
Dave Airlie87f0da52009-02-26 10:12:10 +100016{
17 writel(val & 0xffffffff, reg);
18 writel(val >> 32, reg + 0x4UL);
19}
20#endif
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022/** Current process ID */
Pavel Emelyanovba25f9d2007-10-18 23:40:40 -070023#define DRM_CURRENTPID task_pid_nr(current)
Dave Airlie92514242005-11-12 21:52:46 +110024#define DRM_SUSER(p) capable(CAP_SYS_ADMIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#define DRM_UDELAY(d) udelay(d)
26/** Read a byte from a MMIO region */
27#define DRM_READ8(map, offset) readb(((void __iomem *)(map)->handle) + (offset))
28/** Read a word from a MMIO region */
29#define DRM_READ16(map, offset) readw(((void __iomem *)(map)->handle) + (offset))
30/** Read a dword from a MMIO region */
31#define DRM_READ32(map, offset) readl(((void __iomem *)(map)->handle) + (offset))
32/** Write a byte into a MMIO region */
33#define DRM_WRITE8(map, offset, val) writeb(val, ((void __iomem *)(map)->handle) + (offset))
34/** Write a word into a MMIO region */
35#define DRM_WRITE16(map, offset, val) writew(val, ((void __iomem *)(map)->handle) + (offset))
36/** Write a dword into a MMIO region */
37#define DRM_WRITE32(map, offset, val) writel(val, ((void __iomem *)(map)->handle) + (offset))
38/** Read memory barrier */
Dave Airlie87f0da52009-02-26 10:12:10 +100039
40/** Read a qword from a MMIO region - be careful using these unless you really understand them */
41#define DRM_READ64(map, offset) readq(((void __iomem *)(map)->handle) + (offset))
42/** Write a qword into a MMIO region */
43#define DRM_WRITE64(map, offset, val) writeq(val, ((void __iomem *)(map)->handle) + (offset))
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#define DRM_READMEMORYBARRIER() rmb()
46/** Write memory barrier */
47#define DRM_WRITEMEMORYBARRIER() wmb()
48/** Read/write memory barrier */
49#define DRM_MEMORYBARRIER() mb()
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51/** IRQ handler arguments and return type and values */
David Howells7d12e782006-10-05 14:55:46 +010052#define DRM_IRQ_ARGS int irq, void *arg
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54/** AGP types */
55#if __OS_HAS_AGP
56#define DRM_AGP_MEM struct agp_memory
57#define DRM_AGP_KERN struct agp_kern_info
58#else
59/* define some dummy types for non AGP supporting kernels */
60struct no_agp_kern {
Dave Airlieb5e89ed2005-09-25 14:28:13 +100061 unsigned long aper_base;
62 unsigned long aper_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063};
64#define DRM_AGP_MEM int
65#define DRM_AGP_KERN struct no_agp_kern
66#endif
67
68#if !(__OS_HAS_MTRR)
Dave Airlieb5e89ed2005-09-25 14:28:13 +100069static __inline__ int mtrr_add(unsigned long base, unsigned long size,
70 unsigned int type, char increment)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
72 return -ENODEV;
73}
74
Dave Airlieb5e89ed2005-09-25 14:28:13 +100075static __inline__ int mtrr_del(int reg, unsigned long base, unsigned long size)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076{
77 return -ENODEV;
78}
Dave Airlieb5e89ed2005-09-25 14:28:13 +100079
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#define MTRR_TYPE_WRCOMB 1
81
82#endif
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084/** Other copying of data to kernel space */
85#define DRM_COPY_FROM_USER(arg1, arg2, arg3) \
86 copy_from_user(arg1, arg2, arg3)
87/** Other copying of data from kernel space */
88#define DRM_COPY_TO_USER(arg1, arg2, arg3) \
89 copy_to_user(arg1, arg2, arg3)
90/* Macros for copyfrom user, but checking readability only once */
Dave Airliebc5f4522007-11-05 12:50:58 +100091#define DRM_VERIFYAREA_READ( uaddr, size ) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 (access_ok( VERIFY_READ, uaddr, size ) ? 0 : -EFAULT)
Dave Airliebc5f4522007-11-05 12:50:58 +100093#define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 __copy_from_user(arg1, arg2, arg3)
95#define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3) \
96 __copy_to_user(arg1, arg2, arg3)
97#define DRM_GET_USER_UNCHECKED(val, uaddr) \
98 __get_user(val, uaddr)
99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#define DRM_HZ HZ
101
102#define DRM_WAIT_ON( ret, queue, timeout, condition ) \
103do { \
104 DECLARE_WAITQUEUE(entry, current); \
105 unsigned long end = jiffies + (timeout); \
106 add_wait_queue(&(queue), &entry); \
107 \
108 for (;;) { \
109 __set_current_state(TASK_INTERRUPTIBLE); \
110 if (condition) \
111 break; \
112 if (time_after_eq(jiffies, end)) { \
113 ret = -EBUSY; \
114 break; \
115 } \
116 schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \
117 if (signal_pending(current)) { \
118 ret = -EINTR; \
119 break; \
120 } \
121 } \
122 __set_current_state(TASK_RUNNING); \
123 remove_wait_queue(&(queue), &entry); \
124} while (0)
125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126#define DRM_WAKEUP( queue ) wake_up_interruptible( queue )
127#define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue )