/** * \file drm_fops.h * File operations for DRM * * \author Rickard E. (Rik) Faith * \author Daryll Strauss * \author Gareth Hughes */ /* * Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #define __NO_VERSION__ #include "drmP.h" #include /** * Called whenever a process opens /dev/drm. * * \param inode device inode. * \param filp file pointer. * \param dev device. * \return zero on success or a negative number on failure. * * Creates and initializes a drm_file structure for the file private data in \p * filp and add it into the double linked list in \p dev. */ int DRM(open_helper)(struct inode *inode, struct file *filp, drm_device_t *dev) { int minor = iminor(inode); drm_file_t *priv; if (filp->f_flags & O_EXCL) return -EBUSY; /* No exclusive opens */ if (!DRM(cpu_valid)()) return -EINVAL; DRM_DEBUG("pid = %d, minor = %d\n", current->pid, minor); priv = DRM(alloc)(sizeof(*priv), DRM_MEM_FILES); if(!priv) return -ENOMEM; memset(priv, 0, sizeof(*priv)); filp->private_data = priv; priv->uid = current->euid; priv->pid = current->pid; priv->minor = minor; priv->dev = dev; priv->ioctl_count = 0; priv->authenticated = capable(CAP_SYS_ADMIN); priv->lock_count = 0; DRIVER_OPEN_HELPER( priv, dev ); down(&dev->struct_sem); if (!dev->file_last) { priv->next = NULL; priv->prev = NULL; dev->file_first = priv; dev->file_last = priv; } else { priv->next = NULL; priv->prev = dev->file_last; dev->file_last->next = priv; dev->file_last = priv; } up(&dev->struct_sem); #ifdef __alpha__ /* * Default the hose */ if (!dev->hose) { struct pci_dev *pci_dev; pci_dev = pci_find_class(PCI_CLASS_DISPLAY_VGA << 8, NULL); if (pci_dev) dev->hose = pci_dev->sysdata; if (!dev->hose) { struct pci_bus *b = pci_bus_b(pci_root_buses.next); if (b) dev->hose = b->sysdata; } } #endif return 0; } /** No-op. */ int DRM(flush)(struct file *filp) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n", current->pid, (long)old_encode_dev(dev->device), dev->open_count); return 0; } /** No-op. */ int DRM(fasync)(int fd, struct file *filp, int on) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; int retcode; DRM_DEBUG("fd = %d, device = 0x%lx\n", fd, (long)old_encode_dev(dev->device)); retcode = fasync_helper(fd, filp, on, &dev->buf_async); if (retcode < 0) return retcode; return 0; } #if !__HAVE_DRIVER_FOPS_POLL /** No-op. */ unsigned int DRM(poll)(struct file *filp, struct poll_table_struct *wait) { return 0; } #endif #if !__HAVE_DRIVER_FOPS_READ /** No-op. */ ssize_t DRM(read)(struct file *filp, char __user *buf, size_t count, loff_t *off) { return 0; } #endif n46' href='#n46'>46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 
/**
 * \file drm_os_linux.h
 * OS abstraction macros.
 */

#define __NO_VERSION__

#include <linux/interrupt.h>	/* For task queue support */
#include <linux/delay.h>

/** File pointer type */
#define DRMFILE                         struct file *
/** Ioctl arguments */
#define DRM_IOCTL_ARGS			struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data
#define DRM_ERR(d)			-(d)
/** Current process ID */
#define DRM_CURRENTPID			current->pid
#define DRM_UDELAY(d)			udelay(d)
/** Read a byte from a MMIO region */
#define DRM_READ8(map, offset)		readb(((unsigned long)(map)->handle) + (offset))
/** Read a word from a MMIO region */
#define DRM_READ16(map, offset)		readw(((unsigned long)(map)->handle) + (offset))
/** Read a dword from a MMIO region */
#define DRM_READ32(map, offset)		readl(((unsigned long)(map)->handle) + (offset))
/** Write a byte into a MMIO region */
#define DRM_WRITE8(map, offset, val)	writeb(val, ((unsigned long)(map)->handle) + (offset))
/** Write a word into a MMIO region */
#define DRM_WRITE16(map, offset, val)	writew(val, ((unsigned long)(map)->handle) + (offset))
/** Write a dword into a MMIO region */
#define DRM_WRITE32(map, offset, val)	writel(val, ((unsigned long)(map)->handle) + (offset))
/** Read memory barrier */
#define DRM_READMEMORYBARRIER()		rmb()
/** Write memory barrier */
#define DRM_WRITEMEMORYBARRIER()	wmb()
/** Read/write memory barrier */
#define DRM_MEMORYBARRIER()		mb()
/** DRM device local declaration */
#define DRM_DEVICE	drm_file_t	*priv	= filp->private_data; \
			drm_device_t	*dev	= priv->dev

/** IRQ handler arguments and return type and values */
#define DRM_IRQ_ARGS		int irq, void *arg, struct pt_regs *regs
/** backwards compatibility with old irq return values */
#ifndef IRQ_HANDLED
typedef void irqreturn_t;
#define IRQ_HANDLED   /* nothing */
#define IRQ_NONE      /* nothing */
#endif