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make SW interrupts more robust: write sequence number to scratch register, 

acknowledge any lost interrupts before waiting
main
Michel Daenzer 2002-09-27 21:47:52 +00:00
parent cc9a169d08
commit a33d42e2ba
4 changed files with 52 additions and 34 deletions
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2
shared-core/radeon_drv.h
View File

@ -141,7 +141,6 @@ typedef struct drm_radeon_private {
/* SW interrupt */
wait_queue_head_t swi_queue;
atomic_t swi_received;
atomic_t swi_emitted;
} drm_radeon_private_t;
@ -638,6 +637,7 @@ extern int radeon_emit_irq(drm_device_t *dev);
#define RADEON_LAST_FRAME_REG RADEON_SCRATCH_REG0
#define RADEON_LAST_DISPATCH_REG RADEON_SCRATCH_REG1
#define RADEON_LAST_CLEAR_REG RADEON_SCRATCH_REG2
#define RADEON_LAST_SWI_REG RADEON_SCRATCH_REG3
#define RADEON_LAST_DISPATCH 1
#define RADEON_MAX_VB_AGE 0x7fffffff

37
shared-core/radeon_irq.c
View File

@ -27,6 +27,7 @@
*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
* Michel Dänzer <michel@daenzer.net>
*/
#include "radeon.h"
@ -67,7 +68,6 @@ void DRM(dma_service)( DRM_IRQ_ARGS )
/* SW interrupt */
if (stat & RADEON_SW_INT_TEST) {
ack |= RADEON_SW_INT_TEST_ACK;
atomic_inc(&dev_priv->swi_received);
#ifdef __linux__
wake_up_interruptible(&dev_priv->swi_queue);
#endif
@ -92,21 +92,27 @@ void DRM(dma_service)( DRM_IRQ_ARGS )
RADEON_WRITE(RADEON_GEN_INT_STATUS, ack);
}
static inline void radeon_acknowledge_irqs(drm_radeon_private_t *dev_priv)
{
RADEON_WRITE( RADEON_GEN_INT_STATUS, RADEON_READ( RADEON_GEN_INT_STATUS ) );
}
int radeon_emit_irq(drm_device_t *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(2);
OUT_RING( CP_PACKET0( RADEON_GEN_INT_STATUS, 0 ) );
OUT_RING( RADEON_SW_INT_FIRE );
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 atomic_read(&dev_priv->swi_emitted);
return ret;
}
@ -120,23 +126,24 @@ int radeon_wait_irq(drm_device_t *dev, int swi_nr)
#endif /* __linux__ */
int ret = 0;
if (atomic_read(&dev_priv->swi_received) >= swi_nr)
if (RADEON_READ( RADEON_LAST_SWI_REG ) >= swi_nr)
return 0;
dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
radeon_acknowledge_irqs( dev_priv );
#ifdef __linux__
add_wait_queue(&dev_priv->swi_queue, &entry);
for (;;) {
current->state = TASK_INTERRUPTIBLE;
if (atomic_read(&dev_priv->swi_received) >= swi_nr)
if (RADEON_READ( RADEON_LAST_SWI_REG ) >= swi_nr)
break;
if((signed)(end - jiffies) <= 0) {
ret = -EBUSY; /* Lockup? Missed irq? */
break;
}
schedule_timeout(HZ*3);
schedule_timeout(max(HZ/100,1));
if (signal_pending(current)) {
ret = -EINTR;
break;
@ -171,7 +178,7 @@ int radeon_vblank_wait(drm_device_t *dev, unsigned int *sequence)
int ret = 0;
if ( !dev_priv ) {
DRM_ERROR( "%s called with no initialization\n", __func__ );
DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
return DRM_ERR(EINVAL);
}
@ -181,6 +188,9 @@ int radeon_vblank_wait(drm_device_t *dev, unsigned int *sequence)
while ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) )
+ ~*sequence + 1 ) > (1<<23) ) {
dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
radeon_acknowledge_irqs( dev_priv );
#ifdef __linux__
interruptible_sleep_on( &dev->vbl_queue );
@ -252,24 +262,23 @@ int radeon_irq_wait( DRM_IOCTL_ARGS )
}
/* drm_dma.h hooks
*/
void DRM(driver_irq_preinstall)( drm_device_t *dev ) {
drm_radeon_private_t *dev_priv =
(drm_radeon_private_t *)dev->dev_private;
u32 tmp;
/* Disable *all* interrupts */
RADEON_WRITE( RADEON_GEN_INT_CNTL, 0 );
/* Clear bits if they're already high */
tmp = RADEON_READ( RADEON_GEN_INT_STATUS );
RADEON_WRITE( RADEON_GEN_INT_STATUS, tmp );
radeon_acknowledge_irqs( dev_priv );
}
void DRM(driver_irq_postinstall)( drm_device_t *dev ) {
drm_radeon_private_t *dev_priv =
(drm_radeon_private_t *)dev->dev_private;
atomic_set(&dev_priv->swi_received, 0);
atomic_set(&dev_priv->swi_emitted, 0);
#ifdef __linux__
init_waitqueue_head(&dev_priv->swi_queue);

2
shared/radeon_drv.h
View File

@ -141,7 +141,6 @@ typedef struct drm_radeon_private {
/* SW interrupt */
wait_queue_head_t swi_queue;
atomic_t swi_received;
atomic_t swi_emitted;
} drm_radeon_private_t;
@ -638,6 +637,7 @@ extern int radeon_emit_irq(drm_device_t *dev);
#define RADEON_LAST_FRAME_REG RADEON_SCRATCH_REG0
#define RADEON_LAST_DISPATCH_REG RADEON_SCRATCH_REG1
#define RADEON_LAST_CLEAR_REG RADEON_SCRATCH_REG2
#define RADEON_LAST_SWI_REG RADEON_SCRATCH_REG3
#define RADEON_LAST_DISPATCH 1
#define RADEON_MAX_VB_AGE 0x7fffffff

37
shared/radeon_irq.c
View File

@ -27,6 +27,7 @@
*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
* Michel Dänzer <michel@daenzer.net>
*/
#include "radeon.h"
@ -67,7 +68,6 @@ void DRM(dma_service)( DRM_IRQ_ARGS )
/* SW interrupt */
if (stat & RADEON_SW_INT_TEST) {
ack |= RADEON_SW_INT_TEST_ACK;
atomic_inc(&dev_priv->swi_received);
#ifdef __linux__
wake_up_interruptible(&dev_priv->swi_queue);
#endif
@ -92,21 +92,27 @@ void DRM(dma_service)( DRM_IRQ_ARGS )
RADEON_WRITE(RADEON_GEN_INT_STATUS, ack);
}
static inline void radeon_acknowledge_irqs(drm_radeon_private_t *dev_priv)
{
RADEON_WRITE( RADEON_GEN_INT_STATUS, RADEON_READ( RADEON_GEN_INT_STATUS ) );
}
int radeon_emit_irq(drm_device_t *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(2);
OUT_RING( CP_PACKET0( RADEON_GEN_INT_STATUS, 0 ) );
OUT_RING( RADEON_SW_INT_FIRE );
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 atomic_read(&dev_priv->swi_emitted);
return ret;
}
@ -120,23 +126,24 @@ int radeon_wait_irq(drm_device_t *dev, int swi_nr)
#endif /* __linux__ */
int ret = 0;
if (atomic_read(&dev_priv->swi_received) >= swi_nr)
if (RADEON_READ( RADEON_LAST_SWI_REG ) >= swi_nr)
return 0;
dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
radeon_acknowledge_irqs( dev_priv );
#ifdef __linux__
add_wait_queue(&dev_priv->swi_queue, &entry);
for (;;) {
current->state = TASK_INTERRUPTIBLE;
if (atomic_read(&dev_priv->swi_received) >= swi_nr)
if (RADEON_READ( RADEON_LAST_SWI_REG ) >= swi_nr)
break;
if((signed)(end - jiffies) <= 0) {
ret = -EBUSY; /* Lockup? Missed irq? */
break;
}
schedule_timeout(HZ*3);
schedule_timeout(max(HZ/100,1));
if (signal_pending(current)) {
ret = -EINTR;
break;
@ -171,7 +178,7 @@ int radeon_vblank_wait(drm_device_t *dev, unsigned int *sequence)
int ret = 0;
if ( !dev_priv ) {
DRM_ERROR( "%s called with no initialization\n", __func__ );
DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
return DRM_ERR(EINVAL);
}
@ -181,6 +188,9 @@ int radeon_vblank_wait(drm_device_t *dev, unsigned int *sequence)
while ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) )
+ ~*sequence + 1 ) > (1<<23) ) {
dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
radeon_acknowledge_irqs( dev_priv );
#ifdef __linux__
interruptible_sleep_on( &dev->vbl_queue );
@ -252,24 +262,23 @@ int radeon_irq_wait( DRM_IOCTL_ARGS )
}
/* drm_dma.h hooks
*/
void DRM(driver_irq_preinstall)( drm_device_t *dev ) {
drm_radeon_private_t *dev_priv =
(drm_radeon_private_t *)dev->dev_private;
u32 tmp;
/* Disable *all* interrupts */
RADEON_WRITE( RADEON_GEN_INT_CNTL, 0 );
/* Clear bits if they're already high */
tmp = RADEON_READ( RADEON_GEN_INT_STATUS );
RADEON_WRITE( RADEON_GEN_INT_STATUS, tmp );
radeon_acknowledge_irqs( dev_priv );
}
void DRM(driver_irq_postinstall)( drm_device_t *dev ) {
drm_radeon_private_t *dev_priv =
(drm_radeon_private_t *)dev->dev_private;
atomic_set(&dev_priv->swi_received, 0);
atomic_set(&dev_priv->swi_emitted, 0);
#ifdef __linux__
init_waitqueue_head(&dev_priv->swi_queue);