renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

Age	Commit message (Expand)	Author
2008-10-07	drm: add create gpu tree script	Dave Airlie

/** * \file drm_fops.h * File operations for DRM * * \author Rickard E. (Rik) Faith <faith@valinux.com> * \author Daryll Strauss <daryll@valinux.com> * \author Gareth Hughes <gareth@valinux.com> */ /* * 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 <linux/poll.h> /** * 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 = minor(inode->i_rdev); 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; 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)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)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 *buf, size_t count, loff_t *off) { return 0; } #endif