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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>
*
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "drmP.h"
#include "drm.h"
/*ARGSUSED*/
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 (DRM_ERR(EINVAL));
irq.irq = dev->irq;
DRM_DEBUG("%x:%x:%x => IRQ %x\n",
irq.busnum, irq.devnum, irq.funcnum, irq.irq);
DRM_COPY_TO_USER_IOCTL((drm_irq_busid_t *)data, irq, sizeof (irq));
return (0);
}
/*ARGSUSED*/
static int
drm_install_irq_handle(drm_softstate_t *dev)
{
dev_info_t *dip = NULL;
dip = dev->dip;
if (dip == NULL) {
DRM_ERROR("drm_install_irq_handle: cannot get vgatext's dip");
return (DDI_FAILURE);
}
if (ddi_intr_hilevel(dip, 0) != 0) {
DRM_ERROR("drm_install_irq_handle: "
"high-level interrupts are not supported");
return (DDI_FAILURE);
}
if (ddi_get_iblock_cookie(dip, (uint_t)0,
&dev->intr_block) != DDI_SUCCESS) {
DRM_ERROR("drm_install_irq_handle: cannot get iblock cookie");
return (DDI_FAILURE);
}
mutex_init(&dev->irq_lock, NULL, MUTEX_DRIVER, (void *)dev->intr_block);
/* setup the interrupt handler */
if (ddi_add_intr(dip, 0, &dev->intr_block,
(ddi_idevice_cookie_t *)NULL, dev->irq_handler,
(caddr_t)dev) != DDI_SUCCESS) {
DRM_ERROR("drm_install_irq_handle: ddi_add_intr failed");
return (DDI_FAILURE);
}
DRM_DEBUG("drm_install_irq_handle: add the intr handle successful");
return (DDI_SUCCESS);
}
/*ARGSUSED*/
int
drm_irq_install(drm_softstate_t *dev)
{
int ret;
if (dev->dev_private == NULL) {
DRM_ERROR("drm_irq_install: dev_private is NULL");
return (DRM_ERR(EINVAL));
}
if (dev->irq_enabled) {
DRM_ERROR("drm_irq_install: irq already enabled");
return (DRM_ERR(EBUSY));
}
dev->context_flag = 0;
mutex_init(&dev->tasklet_lock, NULL, MUTEX_DRIVER, NULL);
/* before installing handler */
dev->irq_preinstall(dev);
/* install handler */
ret = drm_install_irq_handle(dev);
if (ret != DDI_SUCCESS) {
DRM_ERROR("drm_irq_install: drm_install_irq_handle failed");
return (ret);
}
/* after installing handler */
dev->irq_postinstall(dev);
dev->irq_enabled = 1;
return (DDI_SUCCESS);
}
static void
drm_uninstall_irq_handle(drm_device_t *dev)
{
ASSERT(dev->dip);
ddi_remove_intr(dev->dip, 0, dev->intr_block);
}
/*ARGSUSED*/
int
drm_irq_uninstall(drm_softstate_t *dev)
{
if (!dev->irq_enabled) {
return (DRM_ERR(EINVAL));
}
dev->irq_enabled = 0;
dev->irq_uninstall(dev);
drm_uninstall_irq_handle(dev);
dev->locked_tasklet_func = NULL;
mutex_destroy(&dev->tasklet_lock);
return (DDI_SUCCESS);
}
/*ARGSUSED*/
int
drm_control(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_control_t ctl;
int err;
DRM_DEBUG("drm_control: install irq = %x\n", dev->irq);
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.
*/
return (drm_irq_install(dev));
case DRM_UNINST_HANDLER:
err = drm_irq_uninstall(dev);
return (err);
default:
return (DRM_ERR(EINVAL));
}
}
/*ARGSUSED*/
int
drm_wait_vblank(DRM_IOCTL_ARGS)
{
return (0);
}
/*ARGSUSED*/
void
drm_vbl_send_signals(drm_device_t *dev)
{
}
void
drm_locked_tasklet(drm_device_t *dev, void (*func)(drm_device_t *))
{
mutex_enter(&dev->tasklet_lock);
if (dev->locked_tasklet_func) {
mutex_exit(&dev->tasklet_lock);
return;
}
dev->locked_tasklet_func = func;
mutex_exit(&dev->tasklet_lock);
}
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