renesas/periject.git - Renesas periject clone

Age	Commit message (Expand)	Author
2019-12-09	wiki: Porting wiki: Porting Chat Log	Kuninori Morimoto

/* drm_fops.h -- File operations for DRM -*- linux-c -*- * 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. * * Authors: * Rickard E. (Rik) Faith <faith@valinux.com> * Daryll Strauss <daryll@valinux.com> * Gareth Hughes <gareth@valinux.com> * */ #include "drmP.h" drm_file_t *drm_find_file_by_proc(drm_device_t *dev, DRM_STRUCTPROC *p) { #if __FreeBSD_version >= 500021 uid_t uid = p->td_ucred->cr_svuid; pid_t pid = p->td_proc->p_pid; #else uid_t uid = p->p_cred->p_svuid; pid_t pid = p->p_pid; #endif drm_file_t *priv; DRM_SPINLOCK_ASSERT(&dev->dev_lock); TAILQ_FOREACH(priv, &dev->files, link) if (priv->pid == pid && priv->uid == uid) return priv; return NULL; } /* drm_open_helper is called whenever a process opens /dev/drm. */ int drm_open_helper(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p, drm_device_t *dev) { int m = minor(kdev); drm_file_t *priv; int retcode; if (flags & O_EXCL) return EBUSY; /* No exclusive opens */ dev->flags = flags; DRM_DEBUG("pid = %d, minor = %d\n", DRM_CURRENTPID, m); DRM_LOCK(); priv = drm_find_file_by_proc(dev, p); if (priv) { priv->refs++; } else { priv = malloc(sizeof(*priv), M_DRM, M_NOWAIT | M_ZERO); if (priv == NULL) { DRM_UNLOCK(); return ENOMEM; } #if __FreeBSD_version >= 500000 priv->uid = p->td_ucred->cr_svuid; priv->pid = p->td_proc->p_pid; #else priv->uid = p->p_cred->p_svuid; priv->pid = p->p_pid; #endif priv->refs = 1; priv->minor = m; priv->ioctl_count = 0; /* for compatibility root is always authenticated */ priv->authenticated = DRM_SUSER(p); if (dev->driver.open) { retcode = -dev->driver.open(dev, priv); if (retcode != 0) { free(priv, M_DRM); DRM_UNLOCK(); return retcode; } } /* first opener automatically becomes master */ priv->master = TAILQ_EMPTY(&dev->files); TAILQ_INSERT_TAIL(&dev->files, priv, link); } DRM_UNLOCK(); #ifdef __FreeBSD__ kdev->si_drv1 = dev; #endif return 0; } /* The drm_read and drm_poll are stubs to prevent spurious errors * on older X Servers (4.3.0 and earlier) */ int drm_read(struct cdev *kdev, struct uio *uio, int ioflag) { return 0; } int drm_poll(struct cdev *kdev, int events, DRM_STRUCTPROC *p) { return 0; }