merged r200-0-2-branch to trunk

1 files changed, 214 insertions, 0 deletions

diff --git a/shared/radeon_irq.c b/shared/radeon_irq.c
new file mode 100644
index 000000000..116093932
--- /dev/null
+++ b/shared/radeon_irq.c
@@ -0,0 +1,214 @@
+/* radeon_mem.c -- Simple agp/fb memory manager 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>
+ */
+
+#include "radeon.h"
+#include "drmP.h"
+#include "drm.h"
+#include "radeon_drm.h"
+#include "radeon_drv.h"
+
+/* 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.
+ */
+
+void DRM(dma_service)( DRM_IRQ_ARGS )
+{
+	drm_device_t *dev = (drm_device_t *) arg;
+	drm_radeon_private_t *dev_priv = 
+	   (drm_radeon_private_t *)dev->dev_private;
+   	u32 temp;
+
+	/* Need to wait for fifo to drain?
+	 */
+	temp = RADEON_READ(RADEON_GEN_INT_STATUS);  
+	temp = temp & RADEON_SW_INT_TEST_ACK;  
+	if (temp == 0) return;  
+	RADEON_WRITE(RADEON_GEN_INT_STATUS, temp);  
+
+	atomic_inc(&dev_priv->irq_received);
+#ifdef __linux__
+	queue_task(&dev->tq, &tq_immediate);  
+	mark_bh(IMMEDIATE_BH);  
+#endif /* __linux__ */
+#ifdef __FreeBSD__
+	taskqueue_enqueue(taskqueue_swi, &dev->task);
+#endif /* __FreeBSD__ */
+}
+
+void DRM(dma_immediate_bh)( DRM_TASKQUEUE_ARGS )
+{
+	drm_device_t *dev = (drm_device_t *) arg;
+	drm_radeon_private_t *dev_priv = 
+	   (drm_radeon_private_t *)dev->dev_private;
+
+#ifdef __linux__
+	wake_up_interruptible(&dev_priv->irq_queue); 
+#endif /* __linux__ */
+#ifdef __FreeBSD__
+	wakeup( &dev_priv->irq_queue );
+#endif
+}
+
+
+int radeon_emit_irq(drm_device_t *dev)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	RING_LOCALS;
+
+	atomic_inc(&dev_priv->irq_emitted);
+
+	BEGIN_RING(2); 
+	OUT_RING( CP_PACKET0( RADEON_GEN_INT_STATUS, 0 ) );
+	OUT_RING( RADEON_SW_INT_FIRE );
+	ADVANCE_RING(); 
+ 	COMMIT_RING();
+
+	return atomic_read(&dev_priv->irq_emitted);
+}
+
+
+int radeon_wait_irq(drm_device_t *dev, int irq_nr)
+{
+  	drm_radeon_private_t *dev_priv = 
+	   (drm_radeon_private_t *)dev->dev_private;
+#ifdef __linux__
+	DECLARE_WAITQUEUE(entry, current);
+	unsigned long end = jiffies + HZ*3;
+#endif /* __linux__ */
+	int ret = 0;
+
+ 	if (atomic_read(&dev_priv->irq_received) >= irq_nr)  
+ 		return 0; 
+
+	dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
+
+#ifdef __linux__
+	add_wait_queue(&dev_priv->irq_queue, &entry);
+
+	for (;;) {
+		current->state = TASK_INTERRUPTIBLE;
+	   	if (atomic_read(&dev_priv->irq_received) >= irq_nr) 
+		   break;
+		if((signed)(end - jiffies) <= 0) {
+		   	ret = -EBUSY;	/* Lockup?  Missed irq? */
+			break;
+		}
+	      	schedule_timeout(HZ*3);
+	      	if (signal_pending(current)) {
+		   	ret = -EINTR;
+			break;
+		}
+	}
+
+	current->state = TASK_RUNNING;
+	remove_wait_queue(&dev_priv->irq_queue, &entry);
+	return ret;
+#endif /* __linux__ */
+	
+#ifdef __FreeBSD__
+	ret = tsleep( &dev_priv->irq_queue, PZERO | PCATCH, \
+		"rdnirq", 3*hz );
+	if ( (ret == EWOULDBLOCK) || (ret == EINTR) )
+		return DRM_ERR(EBUSY);
+	return ret;
+#endif /* __FreeBSD__ */
+}
+
+
+int radeon_emit_and_wait_irq(drm_device_t *dev)
+{
+	return radeon_wait_irq( dev, radeon_emit_irq(dev) );
+}
+
+
+/* Needs the lock as it touches the ring.
+ */
+int radeon_irq_emit( DRM_IOCTL_ARGS )
+{
+	DRM_DEVICE;
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	drm_radeon_irq_emit_t emit;
+	int result;
+
+	LOCK_TEST_WITH_RETURN( dev );
+
+	if ( !dev_priv ) {
+		DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
+		return DRM_ERR(EINVAL);
+	}
+
+	DRM_COPY_FROM_USER_IOCTL( emit, (drm_radeon_irq_emit_t *)data,
+				  sizeof(emit) );
+
+	result = radeon_emit_irq( dev );
+
+	if ( DRM_COPY_TO_USER( emit.irq_seq, &result, sizeof(int) ) ) {
+		DRM_ERROR( "copy_to_user\n" );
+		return DRM_ERR(EFAULT);
+	}
+
+	return 0;
+}
+
+
+/* Doesn't need the hardware lock.
+ */
+int radeon_irq_wait( DRM_IOCTL_ARGS )
+{
+	DRM_DEVICE;
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	drm_radeon_irq_wait_t irqwait;
+
+	if ( !dev_priv ) {
+		DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
+		return DRM_ERR(EINVAL);
+	}
+
+	DRM_COPY_FROM_USER_IOCTL( irqwait, (drm_radeon_irq_wait_t *)data,
+				  sizeof(irqwait) );
+
+	return radeon_wait_irq( dev, irqwait.irq_seq );
+}
+