38 int DRM(open_helper)(struct inode *inode, struct file *filp, drm_device_t *dev)  in DRM()
56 	priv->dev	    = dev;  in DRM()
60 	down(&dev->struct_sem);  in DRM()
61 	if (!dev->file_last) {  in DRM()
64 		dev->file_first = priv;  in DRM()
65 		dev->file_last	= priv;  in DRM()
68 		priv->prev	     = dev->file_last;  in DRM()
69 		dev->file_last->next = priv;  in DRM()
70 		dev->file_last	     = priv;  in DRM()
72 	up(&dev->struct_sem);  in DRM()
78 	if (!dev->hose) {  in DRM()
81 		if (pci_dev) dev->hose = pci_dev->sysdata;  in DRM()
82 		if (!dev->hose) {  in DRM()
84 			if (b) dev->hose = b->sysdata;  in DRM()
95 	drm_device_t  *dev    = priv->dev;  in DRM()  local
98 		  current->pid, (long)dev->device, dev->open_count);  in DRM()
105 	drm_device_t  *dev    = priv->dev;  in DRM()  local
108 	DRM_DEBUG("fd = %d, device = 0x%lx\n", fd, (long)dev->device);  in DRM()
109 	retcode = fasync_helper(fd, filp, on, &dev->buf_async);  in DRM()
122 	drm_device_t  *dev    = priv->dev;  in DRM()  local
129 	DRM_DEBUG("%p, %p\n", dev->buf_rp, dev->buf_wp);  in DRM()
131 	add_wait_queue(&dev->buf_readers, &wait);  in DRM()
133 	while (dev->buf_rp == dev->buf_wp) {  in DRM()
136 			remove_wait_queue(&dev->buf_readers, &wait);  in DRM()
143 			remove_wait_queue(&dev->buf_readers, &wait);  in DRM()
150 	remove_wait_queue(&dev->buf_readers, &wait);  in DRM()
153 	left  = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;  in DRM()
158 		if (dev->buf_wp > dev->buf_rp) {  in DRM()
159 			cur = DRM_MIN(send, dev->buf_wp - dev->buf_rp);  in DRM()
161 			cur = DRM_MIN(send, dev->buf_end - dev->buf_rp);  in DRM()
163 		if (copy_to_user(buf, dev->buf_rp, cur))  in DRM()
165 		dev->buf_rp += cur;  in DRM()
166 		if (dev->buf_rp == dev->buf_end) dev->buf_rp = dev->buf;  in DRM()
170 	wake_up_interruptible(&dev->buf_writers);  in DRM()
174 int DRM(write_string)(drm_device_t *dev, const char *s)  in DRM()
176 	int left   = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;  in DRM()
181 		  left, send, dev->buf_rp, dev->buf_wp);  in DRM()
183 	if (left == 1 || dev->buf_wp != dev->buf_rp) {  in DRM()
186 			  dev->buf_wp,  in DRM()
187 			  dev->buf_rp);  in DRM()
191 		if (dev->buf_wp >= dev->buf_rp) {  in DRM()
192 			count = DRM_MIN(send, dev->buf_end - dev->buf_wp);  in DRM()
195 			count = DRM_MIN(send, dev->buf_rp - dev->buf_wp - 1);  in DRM()
197 		strncpy(dev->buf_wp, s, count);  in DRM()
198 		dev->buf_wp += count;  in DRM()
199 		if (dev->buf_wp == dev->buf_end) dev->buf_wp = dev->buf;  in DRM()
203 	if (dev->buf_async) kill_fasync(&dev->buf_async, SIGIO, POLL_IN);  in DRM()
206 	wake_up_interruptible(&dev->buf_readers);  in DRM()
213 	drm_device_t *dev  = priv->dev;  in DRM()  local
215 	poll_wait(filp, &dev->buf_readers, wait);  in DRM()
216 	if (dev->buf_wp != dev->buf_rp) return POLLIN | POLLRDNORM;  in DRM()