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/*
* Copyright 2007 Jérôme Glisse
* Copyright 2007 Alex Deucher
* Copyright 2007 Dave Airlie
* 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
* 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:
* Jerome Glisse <glisse@freedesktop.org>
*/
#include "drmP.h"
#include "drm.h"
#include "radeon_ms.h"
static uint32_t radeon_ack_irqs(struct drm_radeon_private *dev_priv,
uint32_t mask)
{
uint32_t irqs;
irqs = MMIO_R(GEN_INT_STATUS);
if (irqs) {
MMIO_W(GEN_INT_STATUS, irqs);
}
if (irqs & (~mask)) {
/* reprogram irq */
MMIO_W(GEN_INT_CNTL, dev_priv->driver_state.gen_int_cntl);
}
return irqs;
}
void radeon_ms_irq_emit(struct drm_device *dev)
{
struct drm_radeon_private *dev_priv = dev->dev_private;
uint32_t cmd[4];
int i, ret;
cmd[0] = CP_PACKET0(GEN_INT_CNTL, 1);
cmd[1] = dev_priv->driver_state.gen_int_cntl | GEN_INT_CNTL__SW_INT_EN;
cmd[2] = GEN_INT_STATUS__SW_INT_SET;
/* try to wait but if we timeout we likely are in bad situation */
for (i = 0; i < dev_priv->usec_timeout; i++) {
ret = radeon_ms_ring_emit(dev, cmd, 3);
if (!ret) {
break;
}
}
}
static void radeon_ms_irq_enable(struct drm_device *dev)
{
struct drm_radeon_private *dev_priv = dev->dev_private;
struct radeon_state *state = &dev_priv->driver_state;
state->gen_int_cntl = GEN_INT_CNTL__SW_INT_EN;
radeon_ms_irq_restore(dev, state);
}
irqreturn_t radeon_ms_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *)arg;
struct drm_radeon_private *dev_priv = dev->dev_private;
uint32_t status, mask;
/* Only consider the bits we're interested in - others could be used
* outside the DRM
*/
mask = GEN_INT_STATUS__SW_INT |
GEN_INT_STATUS__CRTC_VBLANK_STAT |
GEN_INT_STATUS__CRTC2_VBLANK_STAT;
status = radeon_ack_irqs(dev_priv, mask);
if (!status) {
return IRQ_NONE;
}
/* SW interrupt */
if (GEN_INT_STATUS__SW_INT & status) {
r3xx_fence_handler(dev);
}
r3xx_fence_handler(dev);
return IRQ_HANDLED;
}
void radeon_ms_irq_preinstall(struct drm_device * dev)
{
struct drm_radeon_private *dev_priv = dev->dev_private;
struct radeon_state *state = &dev_priv->driver_state;
uint32_t mask;
/* Disable *all* interrupts */
state->gen_int_cntl = 0;
radeon_ms_irq_restore(dev, state);
/* Clear bits if they're already high */
mask = GEN_INT_STATUS__SW_INT |
GEN_INT_STATUS__CRTC_VBLANK_STAT |
GEN_INT_STATUS__CRTC2_VBLANK_STAT;
radeon_ack_irqs(dev_priv, mask);
}
int radeon_ms_irq_postinstall(struct drm_device * dev)
{
radeon_ms_irq_enable(dev);
return 0;
}
int radeon_ms_irq_init(struct drm_device *dev)
{
struct drm_radeon_private *dev_priv = dev->dev_private;
struct radeon_state *state = &dev_priv->driver_state;
/* Disable *all* interrupts */
state->gen_int_cntl = 0;
radeon_ms_irq_restore(dev, state);
return 0;
}
void radeon_ms_irq_restore(struct drm_device *dev, struct radeon_state *state)
{
struct drm_radeon_private *dev_priv = dev->dev_private;
MMIO_W(GEN_INT_CNTL, state->gen_int_cntl);
}
void radeon_ms_irq_save(struct drm_device *dev, struct radeon_state *state)
{
struct drm_radeon_private *dev_priv = dev->dev_private;
state->gen_int_cntl = MMIO_R(GEN_INT_CNTL);
}
void radeon_ms_irq_uninstall(struct drm_device * dev)
{
struct drm_radeon_private *dev_priv = dev->dev_private;
struct radeon_state *state = &dev_priv->driver_state;
if (dev_priv == NULL) {
return;
}
/* Disable *all* interrupts */
state->gen_int_cntl = 0;
radeon_ms_irq_restore(dev, state);
}
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