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 /** Read a byte from a MMIO region */
19 #define DRM_READ8(map, offset) readb(((unsigned long)(map)->handle) + (offset))
20 /** Read a word from a MMIO region */
21 #define DRM_READ16(map, offset) readw(((unsigned long)(map)->handle) + (offset))
22 /** Read a dword from a MMIO region */
23 #define DRM_READ32(map, offset) readl(((unsigned long)(map)->handle) + (offset))
24 /** Write a byte into a MMIO region */
25 #define DRM_WRITE8(map, offset, val) writeb(val, ((unsigned long)(map)->handle) + (offset))
26 /** Write a word into a MMIO region */
27 #define DRM_WRITE16(map, offset, val) writew(val, ((unsigned long)(map)->handle) + (offset))
28 /** Write a dword into a MMIO region */
29 #define DRM_WRITE32(map, offset, val) writel(val, ((unsigned long)(map)->handle) + (offset))
30 /** Read memory barrier */
31 #define DRM_READMEMORYBARRIER() rmb()
32 /** Write memory barrier */
33 #define DRM_WRITEMEMORYBARRIER() wmb()
34 /** Read/write memory barrier */
35 #define DRM_MEMORYBARRIER() mb()
36 /** DRM device local declaration */
37 #define DRM_DEVICE drm_file_t *priv = filp->private_data; \
38 drm_device_t *dev = priv->dev
40 /** IRQ handler arguments and return type and values */
41 #define DRM_IRQ_ARGS int irq, void *arg, struct pt_regs *regs
42 /** backwards compatibility with old irq return values */
44 typedef void irqreturn_t;
45 #define IRQ_HANDLED /* nothing */
46 #define IRQ_NONE /* nothing */
51 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,70)
52 #define DRM_AGP_MEM agp_memory
53 #define DRM_AGP_KERN agp_kern_info
55 #define DRM_AGP_MEM struct agp_memory
56 #define DRM_AGP_KERN struct agp_kern_info
59 /* define some dummy types for non AGP supporting kernels */
61 unsigned long aper_base;
62 unsigned long aper_size;
64 #define DRM_AGP_MEM int
65 #define DRM_AGP_KERN struct no_agp_kern
69 static __inline__ int mtrr_add (unsigned long base, unsigned long size,
70 unsigned int type, char increment)
75 static __inline__ int mtrr_del (int reg, unsigned long base,
80 #define MTRR_TYPE_WRCOMB 1
83 /** Task queue handler arguments */
84 #define DRM_TASKQUEUE_ARGS void *arg
86 /** For data going into the kernel through the ioctl argument */
87 #define DRM_COPY_FROM_USER_IOCTL(arg1, arg2, arg3) \
88 if ( copy_from_user(&arg1, arg2, arg3) ) \
90 /** For data going from the kernel through the ioctl argument */
91 #define DRM_COPY_TO_USER_IOCTL(arg1, arg2, arg3) \
92 if ( copy_to_user(arg1, &arg2, arg3) ) \
94 /** Other copying of data to kernel space */
95 #define DRM_COPY_FROM_USER(arg1, arg2, arg3) \
96 copy_from_user(arg1, arg2, arg3)
97 /** Other copying of data from kernel space */
98 #define DRM_COPY_TO_USER(arg1, arg2, arg3) \
99 copy_to_user(arg1, arg2, arg3)
100 /* Macros for copyfrom user, but checking readability only once */
101 #define DRM_VERIFYAREA_READ( uaddr, size ) \
102 verify_area( VERIFY_READ, uaddr, size )
103 #define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3) \
104 __copy_from_user(arg1, arg2, arg3)
105 #define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3) \
106 __copy_to_user(arg1, arg2, arg3)
107 #define DRM_GET_USER_UNCHECKED(val, uaddr) \
108 __get_user(val, uaddr)
109 #define DRM_PUT_USER_UNCHECKED(uaddr, val) \
110 __put_user(val, uaddr)
113 #define DRM_GET_PRIV_WITH_RETURN(_priv, _filp) _priv = _filp->private_data
116 * Get the pointer to the SAREA.
118 * Searches the SAREA on the mapping lists and points drm_device::sarea to it.
120 #define DRM_GETSAREA() \
122 drm_map_list_t *entry; \
123 list_for_each_entry( entry, &dev->maplist->head, head ) { \
125 entry->map->type == _DRM_SHM && \
126 (entry->map->flags & _DRM_CONTAINS_LOCK) ) { \
127 dev_priv->sarea = entry->map; \
135 #define DRM_WAIT_ON( ret, queue, timeout, condition ) \
137 DECLARE_WAITQUEUE(entry, current); \
138 unsigned long end = jiffies + (timeout); \
139 add_wait_queue(&(queue), &entry); \
142 current->state = TASK_INTERRUPTIBLE; \
145 if (time_after_eq(jiffies, end)) { \
149 schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \
150 if (signal_pending(current)) { \
155 current->state = TASK_RUNNING; \
156 remove_wait_queue(&(queue), &entry); \
160 #define DRM_WAKEUP( queue ) wake_up_interruptible( queue )
161 #define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue )