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/* radeon_irq.c -- IRQ handling for radeon -*- linux-c -*- */
/*-
* Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
*
* The Weather Channel (TM) funded Tungsten Graphics to develop the
* initial release of the Radeon 8500 driver under the XFree86 license.
* This notice must be preserved.
*
* 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
* PRECISION INSIGHT 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:
* Keith Whitwell <keith@tungstengraphics.com>
* Michel D�zer <michel@daenzer.net>
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/drm/radeon_irq.c 197603 2009-09-28 22:37:07Z rnoland $");
#include "dev/drm/drmP.h"
#include "dev/drm/drm.h"
#include "dev/drm/radeon_drm.h"
#include "dev/drm/radeon_drv.h"
void radeon_irq_set_state(struct drm_device *dev, u32 mask, int state)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
if (state)
dev_priv->irq_enable_reg |= mask;
else
dev_priv->irq_enable_reg &= ~mask;
if (dev->irq_enabled)
RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg);
}
static void r500_vbl_irq_set_state(struct drm_device *dev, u32 mask, int state)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
if (state)
dev_priv->r500_disp_irq_reg |= mask;
else
dev_priv->r500_disp_irq_reg &= ~mask;
if (dev->irq_enabled)
RADEON_WRITE(R500_DxMODE_INT_MASK, dev_priv->r500_disp_irq_reg);
}
int radeon_enable_vblank(struct drm_device *dev, int crtc)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
switch (crtc) {
case 0:
r500_vbl_irq_set_state(dev, R500_D1MODE_INT_MASK, 1);
break;
case 1:
r500_vbl_irq_set_state(dev, R500_D2MODE_INT_MASK, 1);
break;
default:
DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
crtc);
return EINVAL;
}
} else {
switch (crtc) {
case 0:
radeon_irq_set_state(dev, RADEON_CRTC_VBLANK_MASK, 1);
break;
case 1:
radeon_irq_set_state(dev, RADEON_CRTC2_VBLANK_MASK, 1);
break;
default:
DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
crtc);
return EINVAL;
}
}
return 0;
}
void radeon_disable_vblank(struct drm_device *dev, int crtc)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
switch (crtc) {
case 0:
r500_vbl_irq_set_state(dev, R500_D1MODE_INT_MASK, 0);
break;
case 1:
r500_vbl_irq_set_state(dev, R500_D2MODE_INT_MASK, 0);
break;
default:
DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
crtc);
break;
}
} else {
switch (crtc) {
case 0:
radeon_irq_set_state(dev, RADEON_CRTC_VBLANK_MASK, 0);
break;
case 1:
radeon_irq_set_state(dev, RADEON_CRTC2_VBLANK_MASK, 0);
break;
default:
DRM_ERROR("tried to enable vblank on non-existent crtc %d\n",
crtc);
break;
}
}
}
static __inline__ u32 radeon_acknowledge_irqs(drm_radeon_private_t * dev_priv, u32 *r500_disp_int)
{
u32 irqs = RADEON_READ(RADEON_GEN_INT_STATUS);
u32 irq_mask = RADEON_SW_INT_TEST;
*r500_disp_int = 0;
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
/* vbl interrupts in a different place */
if (irqs & R500_DISPLAY_INT_STATUS) {
/* if a display interrupt */
u32 disp_irq;
disp_irq = RADEON_READ(R500_DISP_INTERRUPT_STATUS);
*r500_disp_int = disp_irq;
if (disp_irq & R500_D1_VBLANK_INTERRUPT) {
RADEON_WRITE(R500_D1MODE_VBLANK_STATUS, R500_VBLANK_ACK);
}
if (disp_irq & R500_D2_VBLANK_INTERRUPT) {
RADEON_WRITE(R500_D2MODE_VBLANK_STATUS, R500_VBLANK_ACK);
}
}
irq_mask |= R500_DISPLAY_INT_STATUS;
} else
irq_mask |= RADEON_CRTC_VBLANK_STAT | RADEON_CRTC2_VBLANK_STAT;
irqs &= irq_mask;
if (irqs)
RADEON_WRITE(RADEON_GEN_INT_STATUS, irqs);
return irqs;
}
/* Interrupts - Used for device synchronization and flushing in the
* following circumstances:
*
* - Exclusive FB access with hw idle:
* - Wait for GUI Idle (?) interrupt, then do normal flush.
*
* - Frame throttling, NV_fence:
* - Drop marker irq's into command stream ahead of time.
* - Wait on irq's with lock *not held*
* - Check each for termination condition
*
* - Internally in cp_getbuffer, etc:
* - as above, but wait with lock held???
*
* NOTE: These functions are misleadingly named -- the irq's aren't
* tied to dma at all, this is just a hangover from dri prehistory.
*/
irqreturn_t radeon_driver_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
drm_radeon_private_t *dev_priv =
(drm_radeon_private_t *) dev->dev_private;
u32 stat;
u32 r500_disp_int;
u32 tmp;
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
return IRQ_NONE;
/* Only consider the bits we're interested in - others could be used
* outside the DRM
*/
stat = radeon_acknowledge_irqs(dev_priv, &r500_disp_int);
if (!stat)
return IRQ_NONE;
stat &= dev_priv->irq_enable_reg;
/* SW interrupt */
if (stat & RADEON_SW_INT_TEST)
DRM_WAKEUP(&dev_priv->swi_queue);
/* VBLANK interrupt */
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
if (r500_disp_int & R500_D1_VBLANK_INTERRUPT)
drm_handle_vblank(dev, 0);
if (r500_disp_int & R500_D2_VBLANK_INTERRUPT)
drm_handle_vblank(dev, 1);
} else {
if (stat & RADEON_CRTC_VBLANK_STAT)
drm_handle_vblank(dev, 0);
if (stat & RADEON_CRTC2_VBLANK_STAT)
drm_handle_vblank(dev, 1);
}
if (dev->msi_enabled) {
switch(dev_priv->flags & RADEON_FAMILY_MASK) {
case CHIP_RS400:
case CHIP_RS480:
tmp = RADEON_READ(RADEON_AIC_CNTL) &
~RS400_MSI_REARM;
RADEON_WRITE(RADEON_AIC_CNTL, tmp);
RADEON_WRITE(RADEON_AIC_CNTL,
tmp | RS400_MSI_REARM);
break;
case CHIP_RS600:
case CHIP_RS690:
case CHIP_RS740:
tmp = RADEON_READ(RADEON_BUS_CNTL) &
~RS600_MSI_REARM;
RADEON_WRITE(RADEON_BUS_CNTL, tmp);
RADEON_WRITE(RADEON_BUS_CNTL, tmp |
RS600_MSI_REARM);
break;
default:
tmp = RADEON_READ(RADEON_MSI_REARM_EN) &
~RV370_MSI_REARM_EN;
RADEON_WRITE(RADEON_MSI_REARM_EN, tmp);
RADEON_WRITE(RADEON_MSI_REARM_EN,
tmp | RV370_MSI_REARM_EN);
break;
}
}
return IRQ_HANDLED;
}
static int radeon_emit_irq(struct drm_device * dev)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
unsigned int ret;
RING_LOCALS;
atomic_inc(&dev_priv->swi_emitted);
ret = atomic_read(&dev_priv->swi_emitted);
BEGIN_RING(4);
OUT_RING_REG(RADEON_LAST_SWI_REG, ret);
OUT_RING_REG(RADEON_GEN_INT_STATUS, RADEON_SW_INT_FIRE);
ADVANCE_RING();
COMMIT_RING();
return ret;
}
static int radeon_wait_irq(struct drm_device * dev, int swi_nr)
{
drm_radeon_private_t *dev_priv =
(drm_radeon_private_t *) dev->dev_private;
int ret = 0;
if (RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr)
return 0;
dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
DRM_WAIT_ON(ret, dev_priv->swi_queue, 3 * DRM_HZ,
RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr);
if (ret == -ERESTART)
DRM_DEBUG("restarting syscall");
return ret;
}
u32 radeon_get_vblank_counter(struct drm_device *dev, int crtc)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
if (crtc < 0 || crtc > 1) {
DRM_ERROR("Invalid crtc %d\n", crtc);
return -EINVAL;
}
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600) {
if (crtc == 0)
return RADEON_READ(R500_D1CRTC_FRAME_COUNT);
else
return RADEON_READ(R500_D2CRTC_FRAME_COUNT);
} else {
if (crtc == 0)
return RADEON_READ(RADEON_CRTC_CRNT_FRAME);
else
return RADEON_READ(RADEON_CRTC2_CRNT_FRAME);
}
}
/* Needs the lock as it touches the ring.
*/
int radeon_irq_emit(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
drm_radeon_irq_emit_t *emit = data;
int result;
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
return -EINVAL;
LOCK_TEST_WITH_RETURN(dev, file_priv);
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
result = radeon_emit_irq(dev);
if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {
DRM_ERROR("copy_to_user\n");
return -EFAULT;
}
return 0;
}
/* Doesn't need the hardware lock.
*/
int radeon_irq_wait(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
drm_radeon_irq_wait_t *irqwait = data;
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
return radeon_wait_irq(dev, irqwait->irq_seq);
}
/* drm_dma.h hooks
*/
void radeon_driver_irq_preinstall(struct drm_device * dev)
{
drm_radeon_private_t *dev_priv =
(drm_radeon_private_t *) dev->dev_private;
u32 dummy;
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
return;
/* Disable *all* interrupts */
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600)
RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
/* Clear bits if they're already high */
radeon_acknowledge_irqs(dev_priv, &dummy);
}
int radeon_driver_irq_postinstall(struct drm_device * dev)
{
drm_radeon_private_t *dev_priv =
(drm_radeon_private_t *) dev->dev_private;
atomic_set(&dev_priv->swi_emitted, 0);
DRM_INIT_WAITQUEUE(&dev_priv->swi_queue);
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
return 0;
radeon_irq_set_state(dev, RADEON_SW_INT_ENABLE, 1);
return 0;
}
void radeon_driver_irq_uninstall(struct drm_device * dev)
{
drm_radeon_private_t *dev_priv =
(drm_radeon_private_t *) dev->dev_private;
if (!dev_priv)
return;
dev_priv->irq_enabled = 0;
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
return;
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600)
RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
/* Disable *all* interrupts */
RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
}
int radeon_vblank_crtc_get(struct drm_device *dev)
{
drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private;
return dev_priv->vblank_crtc;
}
int radeon_vblank_crtc_set(struct drm_device *dev, int64_t value)
{
drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private;
if (value & ~(DRM_RADEON_VBLANK_CRTC1 | DRM_RADEON_VBLANK_CRTC2)) {
DRM_ERROR("called with invalid crtc 0x%x\n", (unsigned int)value);
return -EINVAL;
}
dev_priv->vblank_crtc = (unsigned int)value;
return 0;
}