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/* drm_dma.c -- DMA 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
* 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:
* Eric Anholt <anholt@FreeBSD.org>
*
*/
#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);
DRM(irq_handler)(arg);
DRM_SPINUNLOCK(&dev->irq_lock);
}
#endif
int DRM(irq_install)( drm_device_t *dev, int irq )
{
int retcode;
if ( irq == 0 || dev->dev_private == NULL)
return DRM_ERR(EINVAL);
DRM_LOCK();
if ( dev->irq ) {
DRM_UNLOCK();
return DRM_ERR(EBUSY);
}
dev->irq = irq;
DRM_UNLOCK();
DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, irq );
dev->context_flag = 0;
dev->dma->next_buffer = NULL;
dev->dma->this_buffer = NULL;
#if __HAVE_IRQ_BH
TASK_INIT(&dev->task, 0, DRM(dma_immediate_bh), dev);
#endif
DRM_SPININIT(dev->irq_lock, "DRM IRQ lock");
#if __HAVE_VBL_IRQ && 0 /* disabled */
TAILQ_INIT( &dev->vbl_sig_list );
#endif
/* Before installing handler */
DRM(driver_irq_preinstall)( dev );
/* Install handler */
dev->irqrid = 0;
#ifdef __FreeBSD__
dev->irqr = bus_alloc_resource(dev->device, SYS_RES_IRQ, &dev->irqrid,
0, ~0, 1, RF_SHAREABLE);
if (!dev->irqr) {
#elif defined(__NetBSD__)
if (pci_intr_map(&dev->pa, &dev->ih) != 0) {
#endif
DRM_LOCK();
DRM_SPINUNINIT(dev->irq_lock);
dev->irq = 0;
dev->irqrid = 0;
DRM_UNLOCK();
return ENOENT;
}
#ifdef __FreeBSD__
#if __FreeBSD_version < 500000
retcode = bus_setup_intr(dev->device, dev->irqr, INTR_TYPE_TTY,
DRM(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 ) {
#elif defined(__NetBSD__)
dev->irqh = pci_intr_establish(&dev->pa.pa_pc, dev->ih, IPL_TTY,
(irqreturn_t (*)(DRM_IRQ_ARGS))DRM(irq_handler), dev);
if ( !dev->irqh ) {
#endif
DRM_LOCK();
#ifdef __FreeBSD__
bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid, dev->irqr);
#endif
DRM_SPINUNINIT(dev->irq_lock);
dev->irq = 0;
dev->irqrid = 0;
DRM_UNLOCK();
return retcode;
}
/* After installing handler */
DRM(driver_irq_postinstall)( dev );
return 0;
}
int DRM(irq_uninstall)( drm_device_t *dev )
{
int irq;
int irqrid;
DRM_LOCK();
irq = dev->irq;
irqrid = dev->irqrid;
dev->irq = 0;
dev->irqrid = 0;
DRM_UNLOCK();
if ( !irq )
return DRM_ERR(EINVAL);
DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, irq );
DRM(driver_irq_uninstall)( dev );
#ifdef __FreeBSD__
bus_teardown_intr(dev->device, dev->irqr, dev->irqh);
bus_release_resource(dev->device, SYS_RES_IRQ, irqrid, dev->irqr);
#elif defined(__NetBSD__)
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;
DRM_COPY_FROM_USER_IOCTL( ctl, (drm_control_t *) data, sizeof(ctl) );
switch ( ctl.func ) {
case DRM_INST_HANDLER:
return DRM(irq_install)( dev, ctl.irq );
case DRM_UNINST_HANDLER:
return DRM(irq_uninstall)( dev );
default:
return DRM_ERR(EINVAL);
}
}
#if __HAVE_VBL_IRQ
int DRM(wait_vblank)( DRM_IOCTL_ARGS )
{
DRM_DEVICE;
drm_wait_vblank_t vblwait;
struct timeval now;
int ret;
if (!dev->irq)
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 = DRM_MALLOC(sizeof(drm_vbl_sig_t));
if (vbl_sig == NULL)
return ENOMEM;
bzero(vbl_sig, sizeof(*vbl_sig));
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 {
ret = DRM(vblank_wait)(dev, &vblwait.request.sequence);
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
#endif /* __HAVE_VBL_IRQ */
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