drivers/gpu/drm/radeon/radeon_irq.c - linux/kernel/git/torvalds/linux - Git at Google

 /* 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 "drmP.h"
 #include "drm.h"
 #include "radeon_drm.h"
 #include "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_RS690) {
 		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_RS690) {
 		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_RS690) {
 		/* 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;

 	/* 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_RS690) {
 		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);
 	}
 	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);

 	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_RS690) {
 		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;

 	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;

 	/* Disable *all* interrupts */
 	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690)
 		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);

 	dev->max_vblank_count = 0x001fffff;

 	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;

 	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690)
 		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;
 }
	/* 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 "drmP.h"
	#include "drm.h"
	#include "radeon_drm.h"
	#include "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_RS690) {
	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_RS690) {
	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_RS690) {
	/* 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;

	/* 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_RS690) {
	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);
	}
	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);

	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_RS690) {
	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;

	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;

	/* Disable all interrupts */
	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690)
	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);

	dev->max_vblank_count = 0x001fffff;

	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;

	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690)
	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;
	}