/* $NetBSD: drm_irq.c,v 1.16.6.1 2009/04/23 02:17:14 snj Exp $ */ /* drm_irq.c -- IRQ IOCTL and function support * Created: Fri Oct 18 2003 by anholt@FreeBSD.org */ /*- * Copyright 2003 Eric Anholt * 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 * ERIC ANHOLT 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: * Eric Anholt * */ #include __KERNEL_RCSID(0, "$NetBSD: drm_irq.c,v 1.16.6.1 2009/04/23 02:17:14 snj Exp $"); /* __FBSDID("$FreeBSD: src/sys/dev/drm/drm_irq.c,v 1.2 2005/11/28 23:13:52 anholt Exp $"); */ #include "drmP.h" #include "drm.h" int drm_irq_by_busid(DRM_IOCTL_ARGS) { DRM_DEVICE; drm_irq_busid_t irq; DRM_COPY_FROM_USER_IOCTL(irq, (drm_irq_busid_t *)data, sizeof(irq)); if ((irq.busnum >> 8) != dev->pci_domain || (irq.busnum & 0xff) != dev->pci_bus || irq.devnum != dev->pci_slot || irq.funcnum != dev->pci_func) return EINVAL; irq.irq = dev->irq; DRM_DEBUG("%d:%d:%d => IRQ %d\n", irq.busnum, irq.devnum, irq.funcnum, irq.irq); DRM_COPY_TO_USER_IOCTL( (drm_irq_busid_t *)data, irq, sizeof(irq) ); return 0; } static irqreturn_t drm_irq_handler_wrap(DRM_IRQ_ARGS) { irqreturn_t ret; drm_device_t *dev = (drm_device_t *)arg; DRM_SPINLOCK(&dev->irq_lock); ret = dev->driver.irq_handler(arg); DRM_SPINUNLOCK(&dev->irq_lock); return ret; } int drm_irq_install(drm_device_t *dev) { int retcode; pci_intr_handle_t ih; const char *istr; if (dev->irq == 0 || dev->dev_private == NULL) return DRM_ERR(EINVAL); DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq ); DRM_LOCK(); if (dev->irq_enabled) { DRM_UNLOCK(); return DRM_ERR(EBUSY); } dev->irq_enabled = 1; dev->context_flag = 0; /* Before installing handler */ dev->driver.irq_preinstall(dev); DRM_UNLOCK(); /* Install handler */ if (pci_intr_map(&dev->pa, &ih) != 0) { retcode = ENOENT; goto err; } istr = pci_intr_string(dev->pa.pa_pc, ih); dev->irqh = pci_intr_establish(dev->pa.pa_pc, ih, IPL_TTY, drm_irq_handler_wrap, dev); if (!dev->irqh) { retcode = ENOENT; goto err; } aprint_normal_dev(dev->device, "interrupting at %s\n", istr); /* After installing handler */ DRM_LOCK(); dev->driver.irq_postinstall(dev); DRM_UNLOCK(); return 0; err: DRM_LOCK(); dev->irq_enabled = 0; DRM_SPINUNINIT(&dev->irq_lock); DRM_UNLOCK(); return retcode; } int drm_irq_uninstall(drm_device_t *dev) { if (!dev->irq_enabled) return DRM_ERR(EINVAL); dev->irq_enabled = 0; DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq ); dev->driver.irq_uninstall(dev); pci_intr_disestablish(dev->pa.pa_pc, dev->irqh); return 0; } int drm_control(DRM_IOCTL_ARGS) { DRM_DEVICE; drm_control_t ctl; int err; DRM_COPY_FROM_USER_IOCTL( ctl, (drm_control_t *) data, sizeof(ctl) ); switch ( ctl.func ) { case DRM_INST_HANDLER: /* Handle drivers whose DRM used to require IRQ setup but the * no longer does. */ if (!dev->driver.use_irq) return 0; if (dev->if_version < DRM_IF_VERSION(1, 2) && ctl.irq != dev->irq) return DRM_ERR(EINVAL); return drm_irq_install(dev); case DRM_UNINST_HANDLER: if (!dev->driver.use_irq) return 0; DRM_LOCK(); err = drm_irq_uninstall(dev); DRM_UNLOCK(); return err; default: return DRM_ERR(EINVAL); } } int drm_wait_vblank(DRM_IOCTL_ARGS) { DRM_DEVICE; drm_wait_vblank_t vblwait; struct timeval now; int ret; if (!dev->irq_enabled) return DRM_ERR(EINVAL); DRM_COPY_FROM_USER_IOCTL( vblwait, (drm_wait_vblank_t *)data, sizeof(vblwait) ); if (vblwait.request.type & _DRM_VBLANK_RELATIVE) { vblwait.request.sequence += atomic_read(&dev->vbl_received); vblwait.request.type &= ~_DRM_VBLANK_RELATIVE; } flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK; if (flags & _DRM_VBLANK_SIGNAL) { #if 0 /* disabled */ drm_vbl_sig_t *vbl_sig = malloc(sizeof(drm_vbl_sig_t), M_DRM, M_NOWAIT | M_ZERO); if (vbl_sig == NULL) return ENOMEM; vbl_sig->sequence = vblwait.request.sequence; vbl_sig->signo = vblwait.request.signal; vbl_sig->pid = DRM_CURRENTPID; vblwait.reply.sequence = atomic_read(&dev->vbl_received); DRM_SPINLOCK(&dev->irq_lock); TAILQ_INSERT_HEAD(&dev->vbl_sig_list, vbl_sig, link); DRM_SPINUNLOCK(&dev->irq_lock); ret = 0; #endif ret = EINVAL; } else { DRM_LOCK(); ret = dev->driver.vblank_wait(dev, &vblwait.request.sequence); DRM_UNLOCK(); microtime(&now); vblwait.reply.tval_sec = now.tv_sec; vblwait.reply.tval_usec = now.tv_usec; } DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait, sizeof(vblwait) ); return ret; } void drm_vbl_send_signals(drm_device_t *dev) { } #if 0 /* disabled */ void drm_vbl_send_signals( drm_device_t *dev ) { drm_vbl_sig_t *vbl_sig; unsigned int vbl_seq = atomic_read( &dev->vbl_received ); struct proc *p; vbl_sig = TAILQ_FIRST(&dev->vbl_sig_list); while (vbl_sig != NULL) { drm_vbl_sig_t *next = TAILQ_NEXT(vbl_sig, link); if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) { p = pfind(vbl_sig->pid); if (p != NULL) psignal(p, vbl_sig->signo); TAILQ_REMOVE(&dev->vbl_sig_list, vbl_sig, link); DRM_FREE(vbl_sig,sizeof(*vbl_sig)); } vbl_sig = next; } } #endif