[net-next-2.6.git] / drivers / char / drm / radeon_irq.c

/* 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 Dänzer <michel@daenzer.net>
 */

#include "drmP.h"
#include "drm.h"
#include "radeon_drm.h"
#include "radeon_drv.h"

static __inline__ u32 radeon_acknowledge_irqs(drm_radeon_private_t * dev_priv,
					      u32 mask)
{
	u32 irqs = RADEON_READ(RADEON_GEN_INT_STATUS) & 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;

	/* Only consider the bits we're interested in - others could be used
	 * outside the DRM
	 */
	stat = radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK |
						  RADEON_CRTC_VBLANK_STAT |
						  RADEON_CRTC2_VBLANK_STAT));
	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 (stat & (RADEON_CRTC_VBLANK_STAT|RADEON_CRTC2_VBLANK_STAT)) {
		int vblank_crtc = dev_priv->vblank_crtc;

		if ((vblank_crtc &
		     (DRM_RADEON_VBLANK_CRTC1 | DRM_RADEON_VBLANK_CRTC2)) ==
		    (DRM_RADEON_VBLANK_CRTC1 | DRM_RADEON_VBLANK_CRTC2)) {
			if (stat & RADEON_CRTC_VBLANK_STAT)
				atomic_inc(&dev->vbl_received);
			if (stat & RADEON_CRTC2_VBLANK_STAT)
				atomic_inc(&dev->vbl_received2);
		} else if (((stat & RADEON_CRTC_VBLANK_STAT) &&
			   (vblank_crtc & DRM_RADEON_VBLANK_CRTC1)) ||
			   ((stat & RADEON_CRTC2_VBLANK_STAT) &&
			    (vblank_crtc & DRM_RADEON_VBLANK_CRTC2)))
			atomic_inc(&dev->vbl_received);

		DRM_WAKEUP(&dev->vbl_queue);
		drm_vbl_send_signals(dev);
	}

	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;
}

static int radeon_driver_vblank_do_wait(struct drm_device * dev,
					unsigned int *sequence, int crtc)
{
	drm_radeon_private_t *dev_priv =
	    (drm_radeon_private_t *) dev->dev_private;
	unsigned int cur_vblank;
	int ret = 0;
	int ack = 0;
	atomic_t *counter;
	if (!dev_priv) {
		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
		return -EINVAL;
	}

	if (crtc == DRM_RADEON_VBLANK_CRTC1) {
		counter = &dev->vbl_received;
		ack |= RADEON_CRTC_VBLANK_STAT;
	} else if (crtc == DRM_RADEON_VBLANK_CRTC2) {
		counter = &dev->vbl_received2;
		ack |= RADEON_CRTC2_VBLANK_STAT;
	} else
		return -EINVAL;

	radeon_acknowledge_irqs(dev_priv, ack);

	dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;

	/* Assume that the user has missed the current sequence number
	 * by about a day rather than she wants to wait for years
	 * using vertical blanks...
	 */
	DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ,
		    (((cur_vblank = atomic_read(counter))
		      - *sequence) <= (1 << 23)));

	*sequence = cur_vblank;

	return ret;
}

int radeon_driver_vblank_wait(struct drm_device *dev, unsigned int *sequence)
{
	return radeon_driver_vblank_do_wait(dev, sequence, DRM_RADEON_VBLANK_CRTC1);
}

int radeon_driver_vblank_wait2(struct drm_device *dev, unsigned int *sequence)
{
	return radeon_driver_vblank_do_wait(dev, sequence, DRM_RADEON_VBLANK_CRTC2);
}

/* 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("%s called with no initialization\n", __FUNCTION__);
		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("%s called with no initialization\n", __FUNCTION__);
		return -EINVAL;
	}

	return radeon_wait_irq(dev, irqwait->irq_seq);
}

static void radeon_enable_interrupt(struct drm_device *dev)
{
	drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private;

	dev_priv->irq_enable_reg = RADEON_SW_INT_ENABLE;
	if (dev_priv->vblank_crtc & DRM_RADEON_VBLANK_CRTC1)
		dev_priv->irq_enable_reg |= RADEON_CRTC_VBLANK_MASK;

	if (dev_priv->vblank_crtc & DRM_RADEON_VBLANK_CRTC2)
		dev_priv->irq_enable_reg |= RADEON_CRTC2_VBLANK_MASK;

	RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg);
	dev_priv->irq_enabled = 1;
}

/* 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;

	/* Disable *all* interrupts */
	RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);

	/* Clear bits if they're already high */
	radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK |
					   RADEON_CRTC_VBLANK_STAT |
					   RADEON_CRTC2_VBLANK_STAT));
}

void 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);

	radeon_enable_interrupt(dev);
}

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;

	/* 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;
	u32 flag;
	u32 value;

	flag = RADEON_READ(RADEON_GEN_INT_CNTL);
	value = 0;

	if (flag & RADEON_CRTC_VBLANK_MASK)
		value |= DRM_RADEON_VBLANK_CRTC1;

	if (flag & RADEON_CRTC2_VBLANK_MASK)
		value |= DRM_RADEON_VBLANK_CRTC2;
	return value;
}

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;
	radeon_enable_interrupt(dev);
	return 0;
}
Commit	Line	Data
94bb598e DA	1	/* radeon_irq.c -- IRQ handling for radeon -- linux-c -- */
94bb598e DA	2	/*
1da177e4	3	* Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
b5e89ed5	4	*
1da177e4 LT	5	* The Weather Channel (TM) funded Tungsten Graphics to develop the
	6	* initial release of the Radeon 8500 driver under the XFree86 license.
	7	* This notice must be preserved.
	8	*
	9	* Permission is hereby granted, free of charge, to any person obtaining a
	10	* copy of this software and associated documentation files (the "Software"),
	11	* to deal in the Software without restriction, including without limitation
	12	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	13	* and/or sell copies of the Software, and to permit persons to whom the
	14	* Software is furnished to do so, subject to the following conditions:
	15	*
	16	* The above copyright notice and this permission notice (including the next
	17	* paragraph) shall be included in all copies or substantial portions of the
	18	* Software.
	19	*
	20	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	21	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	23	* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	24	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	25	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	26	* DEALINGS IN THE SOFTWARE.
	27	*
	28	* Authors:
	29	* Keith Whitwell <keith@tungstengraphics.com>
96de0e25	30	* Michel Dänzer <michel@daenzer.net>
1da177e4 LT	31	*/
	32
	33	#include "drmP.h"
	34	#include "drm.h"
	35	#include "radeon_drm.h"
	36	#include "radeon_drv.h"
	37
b5e89ed5 DA	38	static __inline__ u32 radeon_acknowledge_irqs(drm_radeon_private_t * dev_priv,
b5e89ed5 DA	39	u32 mask)
6921e331 DA	40	{
	41	u32 irqs = RADEON_READ(RADEON_GEN_INT_STATUS) & mask;
	42	if (irqs)
	43	RADEON_WRITE(RADEON_GEN_INT_STATUS, irqs);
	44	return irqs;
	45	}
	46
1da177e4 LT	47	/* Interrupts - Used for device synchronization and flushing in the
	48	* following circumstances:
	49	*
	50	* - Exclusive FB access with hw idle:
	51	* - Wait for GUI Idle (?) interrupt, then do normal flush.
	52	*
	53	* - Frame throttling, NV_fence:
	54	* - Drop marker irq's into command stream ahead of time.
	55	* - Wait on irq's with lock not held
	56	* - Check each for termination condition
	57	*
	58	* - Internally in cp_getbuffer, etc:
	59	* - as above, but wait with lock held???
	60	*
	61	* NOTE: These functions are misleadingly named -- the irq's aren't
	62	* tied to dma at all, this is just a hangover from dri prehistory.
	63	*/
	64
b5e89ed5	65	irqreturn_t radeon_driver_irq_handler(DRM_IRQ_ARGS)
1da177e4	66	{
84b1fd10	67	struct drm_device dev = (struct drm_device ) arg;
b5e89ed5 DA	68	drm_radeon_private_t *dev_priv =
	69	(drm_radeon_private_t *) dev->dev_private;
	70	u32 stat;
1da177e4 LT	71
	72	/* Only consider the bits we're interested in - others could be used
	73	* outside the DRM
	74	*/
b5e89ed5	75	stat = radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK \|
ddbee333 DA	76	RADEON_CRTC_VBLANK_STAT \|
ddbee333 DA	77	RADEON_CRTC2_VBLANK_STAT));
1da177e4 LT	78	if (!stat)
	79	return IRQ_NONE;
	80
ddbee333 DA	81	stat &= dev_priv->irq_enable_reg;
ddbee333 DA	82
1da177e4 LT	83	/* SW interrupt */
1da177e4 LT	84	if (stat & RADEON_SW_INT_TEST) {
b5e89ed5	85	DRM_WAKEUP(&dev_priv->swi_queue);
1da177e4 LT	86	}
	87
	88	/* VBLANK interrupt */
ddbee333 DA	89	if (stat & (RADEON_CRTC_VBLANK_STAT\|RADEON_CRTC2_VBLANK_STAT)) {
	90	int vblank_crtc = dev_priv->vblank_crtc;
	91
	92	if ((vblank_crtc &
	93	(DRM_RADEON_VBLANK_CRTC1 \| DRM_RADEON_VBLANK_CRTC2)) ==
	94	(DRM_RADEON_VBLANK_CRTC1 \| DRM_RADEON_VBLANK_CRTC2)) {
	95	if (stat & RADEON_CRTC_VBLANK_STAT)
	96	atomic_inc(&dev->vbl_received);
	97	if (stat & RADEON_CRTC2_VBLANK_STAT)
	98	atomic_inc(&dev->vbl_received2);
	99	} else if (((stat & RADEON_CRTC_VBLANK_STAT) &&
	100	(vblank_crtc & DRM_RADEON_VBLANK_CRTC1)) \|\|
	101	((stat & RADEON_CRTC2_VBLANK_STAT) &&
	102	(vblank_crtc & DRM_RADEON_VBLANK_CRTC2)))
	103	atomic_inc(&dev->vbl_received);
	104
1da177e4	105	DRM_WAKEUP(&dev->vbl_queue);
b5e89ed5	106	drm_vbl_send_signals(dev);
1da177e4 LT	107	}
1da177e4 LT	108
1da177e4 LT	109	return IRQ_HANDLED;
	110	}
	111
84b1fd10	112	static int radeon_emit_irq(struct drm_device * dev)
1da177e4 LT	113	{
	114	drm_radeon_private_t *dev_priv = dev->dev_private;
	115	unsigned int ret;
	116	RING_LOCALS;
	117
	118	atomic_inc(&dev_priv->swi_emitted);
	119	ret = atomic_read(&dev_priv->swi_emitted);
	120
b5e89ed5 DA	121	BEGIN_RING(4);
	122	OUT_RING_REG(RADEON_LAST_SWI_REG, ret);
	123	OUT_RING_REG(RADEON_GEN_INT_STATUS, RADEON_SW_INT_FIRE);
	124	ADVANCE_RING();
	125	COMMIT_RING();
1da177e4 LT	126
	127	return ret;
	128	}
	129
84b1fd10	130	static int radeon_wait_irq(struct drm_device * dev, int swi_nr)
1da177e4	131	{
b5e89ed5 DA	132	drm_radeon_private_t *dev_priv =
b5e89ed5 DA	133	(drm_radeon_private_t *) dev->dev_private;
1da177e4 LT	134	int ret = 0;
1da177e4 LT	135
b5e89ed5 DA	136	if (RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr)
b5e89ed5 DA	137	return 0;
1da177e4 LT	138
	139	dev_priv->stats.boxes \|= RADEON_BOX_WAIT_IDLE;
	140
b5e89ed5 DA	141	DRM_WAIT_ON(ret, dev_priv->swi_queue, 3 * DRM_HZ,
b5e89ed5 DA	142	RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr);
1da177e4 LT	143
	144	return ret;
	145	}
	146
f75a71f5 AB	147	static int radeon_driver_vblank_do_wait(struct drm_device * dev,
f75a71f5 AB	148	unsigned int *sequence, int crtc)
1da177e4	149	{
b5e89ed5 DA	150	drm_radeon_private_t *dev_priv =
b5e89ed5 DA	151	(drm_radeon_private_t *) dev->dev_private;
1da177e4 LT	152	unsigned int cur_vblank;
1da177e4 LT	153	int ret = 0;
ddbee333 DA	154	int ack = 0;
ddbee333 DA	155	atomic_t *counter;
b5e89ed5 DA	156	if (!dev_priv) {
b5e89ed5 DA	157	DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
20caafa6	158	return -EINVAL;
1da177e4 LT	159	}
1da177e4 LT	160
ddbee333 DA	161	if (crtc == DRM_RADEON_VBLANK_CRTC1) {
	162	counter = &dev->vbl_received;
	163	ack \|= RADEON_CRTC_VBLANK_STAT;
	164	} else if (crtc == DRM_RADEON_VBLANK_CRTC2) {
	165	counter = &dev->vbl_received2;
	166	ack \|= RADEON_CRTC2_VBLANK_STAT;
	167	} else
20caafa6	168	return -EINVAL;
ddbee333 DA	169
ddbee333 DA	170	radeon_acknowledge_irqs(dev_priv, ack);
1da177e4 LT	171
	172	dev_priv->stats.boxes \|= RADEON_BOX_WAIT_IDLE;
	173
	174	/* Assume that the user has missed the current sequence number
	175	* by about a day rather than she wants to wait for years
b5e89ed5	176	* using vertical blanks...
1da177e4	177	*/
b5e89ed5	178	DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ,
ddbee333	179	(((cur_vblank = atomic_read(counter))
b5e89ed5	180	- *sequence) <= (1 << 23)));
1da177e4 LT	181
	182	*sequence = cur_vblank;
	183
	184	return ret;
	185	}
	186
84b1fd10	187	int radeon_driver_vblank_wait(struct drm_device dev, unsigned int sequence)
ddbee333 DA	188	{
	189	return radeon_driver_vblank_do_wait(dev, sequence, DRM_RADEON_VBLANK_CRTC1);
	190	}
	191
84b1fd10	192	int radeon_driver_vblank_wait2(struct drm_device dev, unsigned int sequence)
ddbee333 DA	193	{
	194	return radeon_driver_vblank_do_wait(dev, sequence, DRM_RADEON_VBLANK_CRTC2);
	195	}
	196
1da177e4 LT	197	/* Needs the lock as it touches the ring.
1da177e4 LT	198	*/
c153f45f	199	int radeon_irq_emit(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	200	{
1da177e4	201	drm_radeon_private_t *dev_priv = dev->dev_private;
c153f45f	202	drm_radeon_irq_emit_t *emit = data;
1da177e4 LT	203	int result;
1da177e4 LT	204
6c340eac	205	LOCK_TEST_WITH_RETURN(dev, file_priv);
1da177e4	206
b5e89ed5 DA	207	if (!dev_priv) {
b5e89ed5 DA	208	DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
20caafa6	209	return -EINVAL;
1da177e4 LT	210	}
1da177e4 LT	211
b5e89ed5	212	result = radeon_emit_irq(dev);
1da177e4	213
c153f45f	214	if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {
b5e89ed5	215	DRM_ERROR("copy_to_user\n");
20caafa6	216	return -EFAULT;
1da177e4 LT	217	}
	218
	219	return 0;
	220	}
	221
1da177e4 LT	222	/* Doesn't need the hardware lock.
1da177e4 LT	223	*/
c153f45f	224	int radeon_irq_wait(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	225	{
1da177e4	226	drm_radeon_private_t *dev_priv = dev->dev_private;
c153f45f	227	drm_radeon_irq_wait_t *irqwait = data;
1da177e4	228
b5e89ed5 DA	229	if (!dev_priv) {
b5e89ed5 DA	230	DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
20caafa6	231	return -EINVAL;
1da177e4 LT	232	}
1da177e4 LT	233
c153f45f	234	return radeon_wait_irq(dev, irqwait->irq_seq);
1da177e4 LT	235	}
1da177e4 LT	236
84b1fd10	237	static void radeon_enable_interrupt(struct drm_device *dev)
ddbee333 DA	238	{
	239	drm_radeon_private_t dev_priv = (drm_radeon_private_t ) dev->dev_private;
	240
	241	dev_priv->irq_enable_reg = RADEON_SW_INT_ENABLE;
	242	if (dev_priv->vblank_crtc & DRM_RADEON_VBLANK_CRTC1)
	243	dev_priv->irq_enable_reg \|= RADEON_CRTC_VBLANK_MASK;
	244
	245	if (dev_priv->vblank_crtc & DRM_RADEON_VBLANK_CRTC2)
	246	dev_priv->irq_enable_reg \|= RADEON_CRTC2_VBLANK_MASK;
	247
	248	RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg);
	249	dev_priv->irq_enabled = 1;
	250	}
	251
1da177e4 LT	252	/* drm_dma.h hooks
1da177e4 LT	253	*/
84b1fd10	254	void radeon_driver_irq_preinstall(struct drm_device * dev)
b5e89ed5	255	{
1da177e4	256	drm_radeon_private_t *dev_priv =
b5e89ed5	257	(drm_radeon_private_t *) dev->dev_private;
1da177e4	258
b5e89ed5 DA	259	/* Disable all interrupts */
b5e89ed5 DA	260	RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
1da177e4 LT	261
1da177e4 LT	262	/* Clear bits if they're already high */
6921e331	263	radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK \|
ddbee333 DA	264	RADEON_CRTC_VBLANK_STAT \|
ddbee333 DA	265	RADEON_CRTC2_VBLANK_STAT));
1da177e4 LT	266	}
1da177e4 LT	267
84b1fd10	268	void radeon_driver_irq_postinstall(struct drm_device * dev)
b5e89ed5	269	{
1da177e4	270	drm_radeon_private_t *dev_priv =
b5e89ed5	271	(drm_radeon_private_t *) dev->dev_private;
1da177e4	272
b5e89ed5 DA	273	atomic_set(&dev_priv->swi_emitted, 0);
b5e89ed5 DA	274	DRM_INIT_WAITQUEUE(&dev_priv->swi_queue);
1da177e4	275
ddbee333	276	radeon_enable_interrupt(dev);
1da177e4 LT	277	}
1da177e4 LT	278
84b1fd10	279	void radeon_driver_irq_uninstall(struct drm_device * dev)
b5e89ed5	280	{
1da177e4	281	drm_radeon_private_t *dev_priv =
b5e89ed5	282	(drm_radeon_private_t *) dev->dev_private;
1da177e4 LT	283	if (!dev_priv)
	284	return;
	285
ddbee333 DA	286	dev_priv->irq_enabled = 0;
ddbee333 DA	287
1da177e4	288	/* Disable all interrupts */
b5e89ed5	289	RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
1da177e4	290	}
ddbee333 DA	291
ddbee333 DA	292
84b1fd10	293	int radeon_vblank_crtc_get(struct drm_device *dev)
ddbee333 DA	294	{
	295	drm_radeon_private_t dev_priv = (drm_radeon_private_t ) dev->dev_private;
	296	u32 flag;
	297	u32 value;
	298
	299	flag = RADEON_READ(RADEON_GEN_INT_CNTL);
	300	value = 0;
	301
	302	if (flag & RADEON_CRTC_VBLANK_MASK)
	303	value \|= DRM_RADEON_VBLANK_CRTC1;
	304
	305	if (flag & RADEON_CRTC2_VBLANK_MASK)
	306	value \|= DRM_RADEON_VBLANK_CRTC2;
	307	return value;
	308	}
	309
84b1fd10	310	int radeon_vblank_crtc_set(struct drm_device *dev, int64_t value)
ddbee333 DA	311	{
	312	drm_radeon_private_t dev_priv = (drm_radeon_private_t ) dev->dev_private;
	313	if (value & ~(DRM_RADEON_VBLANK_CRTC1 \| DRM_RADEON_VBLANK_CRTC2)) {
	314	DRM_ERROR("called with invalid crtc 0x%x\n", (unsigned int)value);
20caafa6	315	return -EINVAL;
ddbee333 DA	316	}
	317	dev_priv->vblank_crtc = (unsigned int)value;
	318	radeon_enable_interrupt(dev);
	319	return 0;
	320	}