Commit | Line | Data |
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1da177e4 LT |
1 | /** |
2 | * \file drm_os_linux.h | |
3 | * OS abstraction macros. | |
4 | */ | |
5 | ||
1da177e4 LT |
6 | #include <linux/interrupt.h> /* For task queue support */ |
7 | #include <linux/delay.h> | |
8 | ||
87f0da55 | 9 | #ifndef readq |
522b5cc7 | 10 | static inline u64 readq(void __iomem *reg) |
87f0da55 DA |
11 | { |
12 | return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32); | |
13 | } | |
14 | ||
522b5cc7 | 15 | static inline void writeq(u64 val, void __iomem *reg) |
87f0da55 DA |
16 | { |
17 | writel(val & 0xffffffff, reg); | |
18 | writel(val >> 32, reg + 0x4UL); | |
19 | } | |
20 | #endif | |
21 | ||
1da177e4 | 22 | /** Current process ID */ |
ba25f9dc | 23 | #define DRM_CURRENTPID task_pid_nr(current) |
92514243 | 24 | #define DRM_SUSER(p) capable(CAP_SYS_ADMIN) |
1da177e4 LT |
25 | #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 */ | |
87f0da55 DA |
39 | |
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 | ||
1da177e4 LT |
45 | #define DRM_READMEMORYBARRIER() rmb() |
46 | /** Write memory barrier */ | |
47 | #define DRM_WRITEMEMORYBARRIER() wmb() | |
48 | /** Read/write memory barrier */ | |
49 | #define DRM_MEMORYBARRIER() mb() | |
1da177e4 LT |
50 | |
51 | /** IRQ handler arguments and return type and values */ | |
7d12e780 | 52 | #define DRM_IRQ_ARGS int irq, void *arg |
1da177e4 LT |
53 | |
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 */ | |
60 | struct no_agp_kern { | |
b5e89ed5 DA |
61 | unsigned long aper_base; |
62 | unsigned long aper_size; | |
1da177e4 LT |
63 | }; |
64 | #define DRM_AGP_MEM int | |
65 | #define DRM_AGP_KERN struct no_agp_kern | |
66 | #endif | |
1da177e4 | 67 | |
1da177e4 LT |
68 | /** Other copying of data to kernel space */ |
69 | #define DRM_COPY_FROM_USER(arg1, arg2, arg3) \ | |
70 | copy_from_user(arg1, arg2, arg3) | |
71 | /** Other copying of data from kernel space */ | |
72 | #define DRM_COPY_TO_USER(arg1, arg2, arg3) \ | |
73 | copy_to_user(arg1, arg2, arg3) | |
1da177e4 | 74 | |
1da177e4 LT |
75 | #define DRM_HZ HZ |
76 | ||
77 | #define DRM_WAIT_ON( ret, queue, timeout, condition ) \ | |
78 | do { \ | |
79 | DECLARE_WAITQUEUE(entry, current); \ | |
80 | unsigned long end = jiffies + (timeout); \ | |
81 | add_wait_queue(&(queue), &entry); \ | |
82 | \ | |
83 | for (;;) { \ | |
84 | __set_current_state(TASK_INTERRUPTIBLE); \ | |
85 | if (condition) \ | |
86 | break; \ | |
87 | if (time_after_eq(jiffies, end)) { \ | |
88 | ret = -EBUSY; \ | |
89 | break; \ | |
90 | } \ | |
91 | schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \ | |
92 | if (signal_pending(current)) { \ | |
93 | ret = -EINTR; \ | |
94 | break; \ | |
95 | } \ | |
96 | } \ | |
97 | __set_current_state(TASK_RUNNING); \ | |
98 | remove_wait_queue(&(queue), &entry); \ | |
99 | } while (0) | |
100 | ||
48764bf4 | 101 | #define DRM_WAKEUP( queue ) wake_up( queue ) |
1da177e4 | 102 | #define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue ) |