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

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Diffstat (limited to 'bsd-core/mach64_dma.c')

0 files changed, 0 insertions, 0 deletions

/** * \file drm_irq.c * IRQ support * * \author Rickard E. (Rik) Faith <faith@valinux.com> * \author Gareth Hughes <gareth@valinux.com> */ /* * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com * * Copyright 1999, 2000 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/interrupt.h> /* For task queue support */ /** * Get interrupt from bus id. * * \param inode device inode. * \param filp file pointer. * \param cmd command. * \param arg user argument, pointing to a drm_irq_busid structure. * \return zero on success or a negative number on failure. * * Finds the PCI device with the specified bus id and gets its IRQ number. * This IOCTL is deprecated, and will now return EINVAL for any busid not equal * to that of the device that this DRM instance attached to. */ int drm_irq_by_busid(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { struct drm_file *priv = filp->private_data; struct drm_device *dev = priv->head->dev; struct drm_irq_busid __user *argp = (void __user *)arg; struct drm_irq_busid p; if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return -EINVAL; if (copy_from_user(&p, argp, sizeof(p))) return -EFAULT; if ((p.busnum >> 8) != drm_get_pci_domain(dev) || (p.busnum & 0xff) != dev->pdev->bus->number || p.devnum != PCI_SLOT(dev->pdev->devfn) || p.funcnum != PCI_FUNC(dev->pdev->devfn)) return -EINVAL; p.irq = dev->irq; DRM_DEBUG("%d:%d:%d => IRQ %d\n", p.busnum, p.devnum, p.funcnum, p.irq); if (copy_to_user(argp, &p, sizeof(p))) return -EFAULT; return 0; } /** * Install IRQ handler. * * \param dev DRM device. * * Initializes the IRQ related data, and setups drm_device::vbl_queue. Installs the handler, calling the driver * \c drm_driver_irq_preinstall() and \c drm_driver_irq_postinstall() functions * before and after the installation. */ static int drm_irq_install(struct drm_device * dev) { int ret; unsigned long sh_flags = 0; if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return -EINVAL; if (dev->irq == 0) return -EINVAL; mutex_lock(&dev->struct_mutex); /* Driver must have been initialized */ if (!dev->dev_private) { mutex_unlock(&dev->struct_mutex); return -EINVAL; } if (dev->irq_enabled) { mutex_unlock(&dev->struct_mutex); return -EBUSY; } dev->irq_enabled = 1; mutex_unlock(&dev->struct_mutex); DRM_DEBUG("%s: irq=%d\n", __FUNCTION__, dev->irq); if (drm_core_check_feature(dev, DRIVER_IRQ_VBL)) { init_waitqueue_head(&dev->vbl_queue); spin_lock_init(&dev->vbl_lock); INIT_LIST_HEAD(&dev->vbl_sigs); INIT_LIST_HEAD(&dev->vbl_sigs2); dev->vbl_pending = 0; } /* Before installing handler */ dev->driver->irq_preinstall(dev); /* Install handler */ if (drm_core_check_feature(dev, DRIVER_IRQ_SHARED)) sh_flags = IRQF_SHARED; ret = request_irq(dev->irq, dev->driver->irq_handler, sh_flags, dev->devname, dev); if (ret < 0) { mutex_lock(&dev->struct_mutex); dev->irq_enabled = 0; mutex_unlock(&dev->struct_mutex); return ret; } /* After installing handler */ dev->driver->irq_postinstall(dev); return 0; } /** * Uninstall the IRQ handler. * * \param dev DRM device. * * Calls the driver's \c drm_driver_irq_uninstall() function, and stops the irq. */ int drm_irq_uninstall(struct drm_device * dev) { int irq_enabled; if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return -EINVAL; mutex_lock(&dev->struct_mutex); irq_enabled = dev->irq_enabled; dev->irq_enabled = 0; mutex_unlock(&dev->struct_mutex); if (!irq_enabled) return -EINVAL; DRM_DEBUG("%s: irq=%d\n", __FUNCTION__, dev->irq); dev->driver->irq_uninstall(dev); free_irq(dev->irq, dev); dev->locked_tasklet_func = NULL; return 0; } EXPORT_SYMBOL(drm_irq_uninstall); /** * IRQ control ioctl. * * \param inode device inode. * \param filp file pointer. * \param cmd command. * \param arg user argument, pointing to a drm_control structure. * \return zero on success or a negative number on failure. * * Calls irq_install() or irq_uninstall() according to \p arg. */ int drm_control(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { struct drm_file *priv = filp->private_data; struct drm_device *dev = priv->head->dev; struct drm_control ctl; /* if we haven't irq we fallback for compatibility reasons - this used to be a separate function in drm_dma.h */ if (copy_from_user(&ctl, (struct drm_control __user *) arg, sizeof(ctl))) return -EFAULT; switch (ctl.func) { case DRM_INST_HANDLER: if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return 0; if (dev->if_version < DRM_IF_VERSION(1, 2) && ctl.irq != dev->irq) return -EINVAL; return drm_irq_install(dev); case DRM_UNINST_HANDLER: if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return 0; return drm_irq_uninstall(dev); default: return -EINVAL; } } /** * Wait for VBLANK. * * \param inode device inode. * \param filp file pointer. * \param cmd command. * \param data user argument, pointing to a drm_wait_vblank structure. * \return zero on success or a negative number on failure. * * Verifies the IRQ is installed. * * If a signal is requested checks if this task has already scheduled the same signal * for the same vblank sequence number - nothing to be done in * that case. If the number of tasks waiting for the interrupt exceeds 100 the * function fails. Otherwise adds a new entry to drm_device::vbl_sigs for this * task. * * If a signal is not requested, then calls vblank_wait(). */ int drm_wait_vblank(DRM_IOCTL_ARGS) { struct drm_file *priv = filp->private_data; struct drm_device *dev = priv->head->dev; union drm_wait_vblank __user *argp = (void __user *)data; union drm_wait_vblank vblwait; struct timeval now; int ret = 0; unsigned int flags, seq; if ((!dev->irq) || (!dev->irq_enabled)) return -EINVAL; if (copy_from_user(&vblwait, argp, sizeof(vblwait))) return -EFAULT; if (vblwait.request.type & ~(_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK)) { DRM_ERROR("Unsupported type value 0x%x, supported mask 0x%x\n", vblwait.request.type, (_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK)); return -EINVAL; } flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK; if (!drm_core_check_feature(dev, (flags & _DRM_VBLANK_SECONDARY) ? DRIVER_IRQ_VBL2 : DRIVER_IRQ_VBL)) return -EINVAL; seq = atomic_read((flags & _DRM_VBLANK_SECONDARY) ? &dev->vbl_received2 : &dev->vbl_received); switch (vblwait.request.type & _DRM_VBLANK_TYPES_MASK) { case _DRM_VBLANK_RELATIVE: vblwait.request.sequence += seq; vblwait.request.type &= ~_DRM_VBLANK_RELATIVE; case _DRM_VBLANK_ABSOLUTE: break; default: return -EINVAL; } if ((flags & _DRM_VBLANK_NEXTONMISS) && (seq - vblwait.request.sequence) <= (1<<23)) { vblwait.request.sequence = seq + 1; } if (flags & _DRM_VBLANK_SIGNAL) { unsigned long irqflags; struct list_head *vbl_sigs = (flags & _DRM_VBLANK_SECONDARY) ? &dev->vbl_sigs2 : &dev->vbl_sigs; struct drm_vbl_sig *vbl_sig; spin_lock_irqsave(&dev->vbl_lock, irqflags); /* Check if this task has already scheduled the same signal


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