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

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author	Ben Skeggs <darktama@iinet.net.au>	2007-01-02 15:08:04 +1100
committer	Ben Skeggs <darktama@iinet.net.au>	2007-01-02 15:08:04 +1100
commit	41da9fd2e59b2af295c8f345586030e5a70d7a83 (patch)
tree	6eb478f72669456a3aca2081b39731da6218bf48 /linux-core/via_buffer.c
parent	0e0d954584ba95656663efa3daf6e191e521040b (diff)

nouveau: Hook up grctx code for NV4x.

This is enough to get grctx switching going on my NV40 and C51 after the binary driver has initialised the card first. Bumping the drm patchlevel because the ddx needs some modifications to have NV4x work at all with these changes.

Diffstat (limited to 'linux-core/via_buffer.c')

0 files changed, 0 insertions, 0 deletions

/* fops.c -- File operations for DRM -*- c -*- * Created: Mon Jan 4 08:58:31 1999 by faith@precisioninsight.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 * PRECISION INSIGHT 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> * */ #define __NO_VERSION__ #include "drmP.h" #include <sys/signalvar.h> #include <sys/poll.h> drm_file_t *drm_find_file_by_proc(drm_device_t *dev, struct proc *p) { uid_t uid = p->p_cred->p_svuid; pid_t pid = p->p_pid; drm_file_t *priv; TAILQ_FOREACH(priv, &dev->files, link) if (priv->pid == pid && priv->uid == uid) return priv; return NULL; } /* drm_open is called whenever a process opens /dev/drm. */ int drm_open_helper(dev_t kdev, int flags, int fmt, struct proc *p, drm_device_t *dev) { int m = minor(kdev); drm_file_t *priv; if (flags & O_EXCL) return EBUSY; /* No exclusive opens */ dev->flags = flags; DRM_DEBUG("pid = %d, device = %p, minor = %d\n", p->p_pid, dev->device, m); priv = drm_find_file_by_proc(dev, p); if (priv) { priv->refs++; } else { priv = drm_alloc(sizeof(*priv), DRM_MEM_FILES); memset(priv, 0, sizeof(*priv)); priv->uid = p->p_cred->p_svuid; priv->pid = p->p_pid; priv->refs = 1; priv->minor = m; priv->devXX = dev; priv->ioctl_count = 0; priv->authenticated = !suser(p); lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, p); TAILQ_INSERT_TAIL(&dev->files, priv, link); lockmgr(&dev->dev_lock, LK_RELEASE, 0, p); } kdev->si_drv1 = dev; return 0; } int drm_write(dev_t kdev, struct uio *uio, int ioflag) { struct proc *p = curproc; drm_device_t *dev = kdev->si_drv1; DRM_DEBUG("pid = %d, device = %p, open_count = %d\n", p->p_pid, dev->device, dev->open_count); return 0; } /* drm_release is called whenever a process closes /dev/drm*. */ int drm_close(dev_t kdev, int fflag, int devtype, struct proc *p) { drm_device_t *dev = kdev->si_drv1; drm_file_t *priv; DRM_DEBUG("pid = %d, device = %p, open_count = %d\n", p->p_pid, dev->device, dev->open_count); priv = drm_find_file_by_proc(dev, p); if (!priv) { DRM_DEBUG("can't find authenticator\n"); return EINVAL; } if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) && dev->lock.pid == p->p_pid) { DRM_ERROR("Process %d dead, freeing lock for context %d\n", p->p_pid, _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)); drm_lock_free(dev, &dev->lock.hw_lock->lock, _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)); /* FIXME: may require heavy-handed reset of hardware at this point, possibly processed via a callback to the X server. */ } drm_reclaim_buffers(dev, priv->pid); funsetown(dev->buf_sigio); lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, p); priv = drm_find_file_by_proc(dev, p); if (priv) { priv->refs--; if (!priv->refs) { TAILQ_REMOVE(&dev->files, priv, link); drm_free(priv, sizeof(*priv), DRM_MEM_FILES); } } lockmgr(&dev->dev_lock, LK_RELEASE, 0, p); return 0; } /* The drm_read and drm_write_string code (especially that which manages the circular buffer), is based on Alessandro Rubini's LINUX DEVICE DRIVERS (Cambridge: O'Reilly, 1998), pages 111-113. */ ssize_t drm_read(dev_t kdev, struct uio *uio, int ioflag) { drm_device_t *dev = kdev->si_drv1; int left; int avail; int send; int cur; int error = 0; DRM_DEBUG("%p, %p\n", dev->buf_rp, dev->buf_wp); while (dev->buf_rp == dev->buf_wp) { DRM_DEBUG(" sleeping\n"); if (dev->flags & FASYNC) { return EWOULDBLOCK; } error = tsleep(&dev->buf_rp, PZERO|PCATCH, "drmrd", 0); if (error) { DRM_DEBUG(" interrupted\n"); return error; } DRM_DEBUG(" awake\n"); } left = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ; avail = DRM_BSZ - left; send = DRM_MIN(avail, uio->uio_resid); while (send) { if (dev->buf_wp > dev->buf_rp) { cur = DRM_MIN(send, dev->buf_wp - dev->buf_rp); } else { cur = DRM_MIN(send, dev->buf_end - dev->buf_rp); } error = uiomove(dev->buf_rp, cur, uio); if (error) break; dev->buf_rp += cur; if (dev->buf_rp == dev->buf_end) dev->buf_rp = dev->buf; send -= cur; } wakeup(&dev->buf_wp); return error; } int drm_write_string(drm_device_t *dev, const char *s) { int left = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ; int send = strlen(s); int count; DRM_DEBUG("%d left, %d to send (%p, %p)\n", left, send, dev->buf_rp, dev->buf_wp); if (left == 1 || dev->buf_wp != dev->buf_rp) { DRM_ERROR("Buffer not empty (%d left, wp = %p, rp = %p)\n", left, dev->buf_wp, dev->buf_rp); } while (send) { if (dev->buf_wp >= dev->buf_rp) { count = DRM_MIN(send, dev->buf_end - dev->buf_wp); if (count == left) --count; /* Leave a hole */ } else { count = DRM_MIN(send, dev->buf_rp - dev->buf_wp - 1); } strncpy(dev->buf_wp, s, count); dev->buf_wp += count; if (dev->buf_wp == dev->buf_end) dev->buf_wp = dev->buf; send -= count; } if (dev->buf_selecting) { dev->buf_selecting = 0; selwakeup(&dev->buf_sel); } DRM_DEBUG("dev->buf_sigio=%p\n", dev->buf_sigio); if (dev->buf_sigio) { DRM_DEBUG("dev->buf_sigio->sio_pgid=%d\n", dev->buf_sigio->sio_pgid); pgsigio(dev->buf_sigio, SIGIO, 0); } DRM_DEBUG("waking\n"); wakeup(&dev->buf_rp); return 0; } int drm_poll(dev_t kdev, int events, struct proc *p) { drm_device_t *dev = kdev->si_drv1; int s; int revents = 0; s = spldrm(); if (events & (POLLIN | POLLRDNORM)) { int left = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ; if (left > 0) revents |= events & (POLLIN | POLLRDNORM); else selrecord(p, &dev->buf_sel); } splx(s); return revents; }


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