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NetBSD/sys/dev/drm/drm_irq.c

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/* 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 <anholt@FreeBSD.org>
*
*/
#include <sys/cdefs.h>
/*
__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;
}
#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
static irqreturn_t
drm_irq_handler_wrap(DRM_IRQ_ARGS)
{
drm_device_t *dev = (drm_device_t *)arg;
DRM_SPINLOCK(&dev->irq_lock);
dev->driver.irq_handler(arg);
DRM_SPINUNLOCK(&dev->irq_lock);
}
#endif
#ifdef __NetBSD__
static irqreturn_t
drm_irq_handler_wrap(DRM_IRQ_ARGS)
{
int s;
irqreturn_t ret;
drm_device_t *dev = (drm_device_t *)arg;
s = spldrm();
DRM_SPINLOCK(&dev->irq_lock);
ret = dev->driver.irq_handler(arg);
DRM_SPINUNLOCK(&dev->irq_lock);
splx(s);
return ret;
}
#endif
int drm_irq_install(drm_device_t *dev)
{
int retcode;
#ifdef __NetBSD__
pci_intr_handle_t ih;
const char *istr;
#endif
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;
DRM_SPININIT(dev->irq_lock, "DRM IRQ lock");
/* Before installing handler */
dev->driver.irq_preinstall(dev);
DRM_UNLOCK();
/* Install handler */
#ifdef __FreeBSD__
dev->irqrid = 0;
dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
&dev->irqrid, RF_SHAREABLE);
if (!dev->irqr) {
retcode = ENOENT;
goto err;
}
#if __FreeBSD_version < 500000
retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY,
dev->irq_handler, dev, &dev->irqh);
#else
retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY | INTR_MPSAFE,
drm_irq_handler_wrap, dev, &dev->irqh);
#endif
if (retcode != 0)
goto err;
#elif defined(__NetBSD__) || defined(__OpenBSD__)
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("%s: interrupting at %s\n", dev->device.dv_xname, istr);
#endif
/* After installing handler */
DRM_LOCK();
dev->driver.irq_postinstall(dev);
DRM_UNLOCK();
return 0;
err:
DRM_LOCK();
dev->irq_enabled = 0;
#ifdef ___FreeBSD__
if (dev->irqrid != 0) {
bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
dev->irqr);
dev->irqrid = 0;
}
#endif
DRM_SPINUNINIT(dev->irq_lock);
DRM_UNLOCK();
return retcode;
}
int drm_irq_uninstall(drm_device_t *dev)
{
#ifdef __FreeBSD__
int irqrid;
#endif
if (!dev->irq_enabled)
return DRM_ERR(EINVAL);
dev->irq_enabled = 0;
#ifdef __FreeBSD__
irqrid = dev->irqrid;
dev->irqrid = 0;
#endif
DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
dev->driver.irq_uninstall(dev);
#ifdef __FreeBSD__
DRM_UNLOCK();
bus_teardown_intr(dev->device, dev->irqr, dev->irqh);
bus_release_resource(dev->device, SYS_RES_IRQ, irqrid, dev->irqr);
DRM_LOCK();
#elif defined(__NetBSD__) || defined(__OpenBSD__)
pci_intr_disestablish(dev->pa.pa_pc, dev->irqh);
#endif
DRM_SPINUNINIT(dev->irq_lock);
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
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