diff options
Diffstat (limited to 'nx-X11/extras/drm/linux/drm_fops.h')
| -rw-r--r-- | nx-X11/extras/drm/linux/drm_fops.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/nx-X11/extras/drm/linux/drm_fops.h b/nx-X11/extras/drm/linux/drm_fops.h new file mode 100644 index 000000000..0e91190a3 --- /dev/null +++ b/nx-X11/extras/drm/linux/drm_fops.h @@ -0,0 +1,153 @@ +/** + * \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. + */ + +#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 = iminor(inode); + drm_file_t *priv; + int ret; + + 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; + + if (dev->fn_tbl.open_helper) { + ret=dev->fn_tbl.open_helper(dev, priv); + if (ret < 0) + goto out_free; + } + + 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; +out_free: + DRM(free)(priv, sizeof(*priv), DRM_MEM_FILES); + filp->private_data=NULL; + return ret; +} + +/** 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; +} + +/** No-op. */ +unsigned int DRM(poll)(struct file *filp, struct poll_table_struct *wait) +{ + return 0; +} + + +/** No-op. */ +ssize_t DRM(read)(struct file *filp, char __user *buf, size_t count, loff_t *off) +{ + return 0; +} |