3 * OS abstraction macros.
7 #include <linux/interrupt.h> /* For task queue support */
8 #include <linux/delay.h>
10 /** File pointer type */
11 #define DRMFILE struct file *
12 /** Ioctl arguments */
13 #define DRM_IOCTL_ARGS struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data
14 #define DRM_ERR(d) -(d)
15 /** Current process ID */
16 #define DRM_CURRENTPID current->pid
17 #define DRM_UDELAY(d) udelay(d)
18 #if LINUX_VERSION_CODE <= 0x020608 /* KERNEL_VERSION(2,6,8) */
19 /** Read a byte from a MMIO region */
20 #define DRM_READ8(map, offset) readb(((unsigned long)(map)->handle) + (offset))
21 /** Read a word from a MMIO region */
22 #define DRM_READ16(map, offset) readw(((unsigned long)(map)->handle) + (offset))
23 /** Read a dword from a MMIO region */
24 #define DRM_READ32(map, offset) readl(((unsigned long)(map)->handle) + (offset))
25 /** Write a byte into a MMIO region */
26 #define DRM_WRITE8(map, offset, val) writeb(val, ((unsigned long)(map)->handle) + (offset))
27 /** Write a word into a MMIO region */
28 #define DRM_WRITE16(map, offset, val) writew(val, ((unsigned long)(map)->handle) + (offset))
29 /** Write a dword into a MMIO region */
30 #define DRM_WRITE32(map, offset, val) writel(val, ((unsigned long)(map)->handle) + (offset))
32 /** Read a byte from a MMIO region */
33 #define DRM_READ8(map, offset) readb((map)->handle + (offset))
34 /** Read a word from a MMIO region */
35 #define DRM_READ16(map, offset) readw((map)->handle + (offset))
36 /** Read a dword from a MMIO region */
37 #define DRM_READ32(map, offset) readl((map)->handle + (offset))
38 /** Write a byte into a MMIO region */
39 #define DRM_WRITE8(map, offset, val) writeb(val, (map)->handle + (offset))
40 /** Write a word into a MMIO region */
41 #define DRM_WRITE16(map, offset, val) writew(val, (map)->handle + (offset))
42 /** Write a dword into a MMIO region */
43 #define DRM_WRITE32(map, offset, val) writel(val, (map)->handle + (offset))
45 /** Read memory barrier */
46 #define DRM_READMEMORYBARRIER() rmb()
47 /** Write memory barrier */
48 #define DRM_WRITEMEMORYBARRIER() wmb()
49 /** Read/write memory barrier */
50 #define DRM_MEMORYBARRIER() mb()
51 /** DRM device local declaration */
52 #define DRM_DEVICE drm_file_t *priv = filp->private_data; \
53 drm_device_t *dev = priv->dev
55 /** IRQ handler arguments and return type and values */
56 #define DRM_IRQ_ARGS int irq, void *arg, struct pt_regs *regs
57 /** backwards compatibility with old irq return values */
59 typedef void irqreturn_t;
60 #define IRQ_HANDLED /* nothing */
61 #define IRQ_NONE /* nothing */
66 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,70)
67 #define DRM_AGP_MEM agp_memory
68 #define DRM_AGP_KERN agp_kern_info
70 #define DRM_AGP_MEM struct agp_memory
71 #define DRM_AGP_KERN struct agp_kern_info
74 /* define some dummy types for non AGP supporting kernels */
76 unsigned long aper_base;
77 unsigned long aper_size;
79 #define DRM_AGP_MEM int
80 #define DRM_AGP_KERN struct no_agp_kern
84 static __inline__ int mtrr_add (unsigned long base, unsigned long size,
85 unsigned int type, char increment)
90 static __inline__ int mtrr_del (int reg, unsigned long base,
95 #define MTRR_TYPE_WRCOMB 1
98 /** Task queue handler arguments */
99 #define DRM_TASKQUEUE_ARGS void *arg
101 /** For data going into the kernel through the ioctl argument */
102 #define DRM_COPY_FROM_USER_IOCTL(arg1, arg2, arg3) \
103 if ( copy_from_user(&arg1, arg2, arg3) ) \
105 /** For data going from the kernel through the ioctl argument */
106 #define DRM_COPY_TO_USER_IOCTL(arg1, arg2, arg3) \
107 if ( copy_to_user(arg1, &arg2, arg3) ) \
109 /** Other copying of data to kernel space */
110 #define DRM_COPY_FROM_USER(arg1, arg2, arg3) \
111 copy_from_user(arg1, arg2, arg3)
112 /** Other copying of data from kernel space */
113 #define DRM_COPY_TO_USER(arg1, arg2, arg3) \
114 copy_to_user(arg1, arg2, arg3)
115 /* Macros for copyfrom user, but checking readability only once */
116 #define DRM_VERIFYAREA_READ( uaddr, size ) \
117 verify_area( VERIFY_READ, uaddr, size )
118 #define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3) \
119 __copy_from_user(arg1, arg2, arg3)
120 #define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3) \
121 __copy_to_user(arg1, arg2, arg3)
122 #define DRM_GET_USER_UNCHECKED(val, uaddr) \
123 __get_user(val, uaddr)
124 #define DRM_PUT_USER_UNCHECKED(uaddr, val) \
125 __put_user(val, uaddr)
128 #define DRM_GET_PRIV_WITH_RETURN(_priv, _filp) _priv = _filp->private_data
131 * Get the pointer to the SAREA.
133 * Searches the SAREA on the mapping lists and points drm_device::sarea to it.
135 #define DRM_GETSAREA() \
137 drm_map_list_t *entry; \
138 list_for_each_entry( entry, &dev->maplist->head, head ) { \
140 entry->map->type == _DRM_SHM && \
141 (entry->map->flags & _DRM_CONTAINS_LOCK) ) { \
142 dev_priv->sarea = entry->map; \
150 #define DRM_WAIT_ON( ret, queue, timeout, condition ) \
152 DECLARE_WAITQUEUE(entry, current); \
153 unsigned long end = jiffies + (timeout); \
154 add_wait_queue(&(queue), &entry); \
157 current->state = TASK_INTERRUPTIBLE; \
160 if (time_after_eq(jiffies, end)) { \
164 schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \
165 if (signal_pending(current)) { \
170 current->state = TASK_RUNNING; \
171 remove_wait_queue(&(queue), &entry); \
175 #define DRM_WAKEUP( queue ) wake_up_interruptible( queue )
176 #define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue )