[deliverable/linux.git] / drivers / gpu / drm / radeon / radeon_irq_kms.c

/*
 * Copyright 2008 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 * Copyright 2009 Jerome Glisse.
 *
 * 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 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
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Dave Airlie
 *          Alex Deucher
 *          Jerome Glisse
 */
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/radeon_drm.h>
#include "radeon_reg.h"
#include "radeon.h"
#include "atom.h"

#define RADEON_WAIT_IDLE_TIMEOUT 200

/**
 * radeon_driver_irq_handler_kms - irq handler for KMS
 *
 * @DRM_IRQ_ARGS: args
 *
 * This is the irq handler for the radeon KMS driver (all asics).
 * radeon_irq_process is a macro that points to the per-asic
 * irq handler callback.
 */
irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
{
	struct drm_device *dev = (struct drm_device *) arg;
	struct radeon_device *rdev = dev->dev_private;

	return radeon_irq_process(rdev);
}

/*
 * Handle hotplug events outside the interrupt handler proper.
 */
/**
 * radeon_hotplug_work_func - display hotplug work handler
 *
 * @work: work struct
 *
 * This is the hot plug event work handler (all asics).
 * The work gets scheduled from the irq handler if there
 * was a hot plug interrupt.  It walks the connector table
 * and calls the hotplug handler for each one, then sends
 * a drm hotplug event to alert userspace.
 */
static void radeon_hotplug_work_func(struct work_struct *work)
{
	struct radeon_device *rdev = container_of(work, struct radeon_device,
						  hotplug_work);
	struct drm_device *dev = rdev->ddev;
	struct drm_mode_config *mode_config = &dev->mode_config;
	struct drm_connector *connector;

	if (mode_config->num_connector) {
		list_for_each_entry(connector, &mode_config->connector_list, head)
			radeon_connector_hotplug(connector);
	}
	/* Just fire off a uevent and let userspace tell us what to do */
	drm_helper_hpd_irq_event(dev);
}

/**
 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
 *
 * @dev: drm dev pointer
 *
 * Gets the hw ready to enable irqs (all asics).
 * This function disables all interrupt sources on the GPU.
 */
void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
{
	struct radeon_device *rdev = dev->dev_private;
	unsigned long irqflags;
	unsigned i;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	/* Disable *all* interrupts */
	for (i = 0; i < RADEON_NUM_RINGS; i++)
		atomic_set(&rdev->irq.ring_int[i], 0);
	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
		rdev->irq.hpd[i] = false;
	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
		rdev->irq.crtc_vblank_int[i] = false;
		atomic_set(&rdev->irq.pflip[i], 0);
		rdev->irq.afmt[i] = false;
	}
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	/* Clear bits */
	radeon_irq_process(rdev);
}

/**
 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
 *
 * @dev: drm dev pointer
 *
 * Handles stuff to be done after enabling irqs (all asics).
 * Returns 0 on success.
 */
int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
{
	dev->max_vblank_count = 0x001fffff;
	return 0;
}

/**
 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
 *
 * @dev: drm dev pointer
 *
 * This function disables all interrupt sources on the GPU (all asics).
 */
void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
{
	struct radeon_device *rdev = dev->dev_private;
	unsigned long irqflags;
	unsigned i;

	if (rdev == NULL) {
		return;
	}
	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	/* Disable *all* interrupts */
	for (i = 0; i < RADEON_NUM_RINGS; i++)
		atomic_set(&rdev->irq.ring_int[i], 0);
	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
		rdev->irq.hpd[i] = false;
	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
		rdev->irq.crtc_vblank_int[i] = false;
		atomic_set(&rdev->irq.pflip[i], 0);
		rdev->irq.afmt[i] = false;
	}
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}

/**
 * radeon_msi_ok - asic specific msi checks
 *
 * @rdev: radeon device pointer
 *
 * Handles asic specific MSI checks to determine if
 * MSIs should be enabled on a particular chip (all asics).
 * Returns true if MSIs should be enabled, false if MSIs
 * should not be enabled.
 */
static bool radeon_msi_ok(struct radeon_device *rdev)
{
	/* RV370/RV380 was first asic with MSI support */
	if (rdev->family < CHIP_RV380)
		return false;

	/* MSIs don't work on AGP */
	if (rdev->flags & RADEON_IS_AGP)
		return false;

	/* force MSI on */
	if (radeon_msi == 1)
		return true;
	else if (radeon_msi == 0)
		return false;

	/* Quirks */
	/* HP RS690 only seems to work with MSIs. */
	if ((rdev->pdev->device == 0x791f) &&
	    (rdev->pdev->subsystem_vendor == 0x103c) &&
	    (rdev->pdev->subsystem_device == 0x30c2))
		return true;

	/* Dell RS690 only seems to work with MSIs. */
	if ((rdev->pdev->device == 0x791f) &&
	    (rdev->pdev->subsystem_vendor == 0x1028) &&
	    (rdev->pdev->subsystem_device == 0x01fc))
		return true;

	/* Dell RS690 only seems to work with MSIs. */
	if ((rdev->pdev->device == 0x791f) &&
	    (rdev->pdev->subsystem_vendor == 0x1028) &&
	    (rdev->pdev->subsystem_device == 0x01fd))
		return true;

	/* Gateway RS690 only seems to work with MSIs. */
	if ((rdev->pdev->device == 0x791f) &&
	    (rdev->pdev->subsystem_vendor == 0x107b) &&
	    (rdev->pdev->subsystem_device == 0x0185))
		return true;

	/* try and enable MSIs by default on all RS690s */
	if (rdev->family == CHIP_RS690)
		return true;

	/* RV515 seems to have MSI issues where it loses
	 * MSI rearms occasionally. This leads to lockups and freezes.
	 * disable it by default.
	 */
	if (rdev->family == CHIP_RV515)
		return false;
	if (rdev->flags & RADEON_IS_IGP) {
		/* APUs work fine with MSIs */
		if (rdev->family >= CHIP_PALM)
			return true;
		/* lots of IGPs have problems with MSIs */
		return false;
	}

	return true;
}

/**
 * radeon_irq_kms_init - init driver interrupt info
 *
 * @rdev: radeon device pointer
 *
 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
 * Returns 0 for success, error for failure.
 */
int radeon_irq_kms_init(struct radeon_device *rdev)
{
	int r = 0;

	INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
	INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);

	spin_lock_init(&rdev->irq.lock);
	r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
	if (r) {
		return r;
	}
	/* enable msi */
	rdev->msi_enabled = 0;

	if (radeon_msi_ok(rdev)) {
		int ret = pci_enable_msi(rdev->pdev);
		if (!ret) {
			rdev->msi_enabled = 1;
			dev_info(rdev->dev, "radeon: using MSI.\n");
		}
	}
	rdev->irq.installed = true;
	r = drm_irq_install(rdev->ddev);
	if (r) {
		rdev->irq.installed = false;
		return r;
	}
	DRM_INFO("radeon: irq initialized.\n");
	return 0;
}

/**
 * radeon_irq_kms_fini - tear down driver interrupt info
 *
 * @rdev: radeon device pointer
 *
 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
 */
void radeon_irq_kms_fini(struct radeon_device *rdev)
{
	drm_vblank_cleanup(rdev->ddev);
	if (rdev->irq.installed) {
		drm_irq_uninstall(rdev->ddev);
		rdev->irq.installed = false;
		if (rdev->msi_enabled)
			pci_disable_msi(rdev->pdev);
	}
	flush_work(&rdev->hotplug_work);
}

/**
 * radeon_irq_kms_sw_irq_get - enable software interrupt
 *
 * @rdev: radeon device pointer
 * @ring: ring whose interrupt you want to enable
 *
 * Enables the software interrupt for a specific ring (all asics).
 * The software interrupt is generally used to signal a fence on
 * a particular ring.
 */
void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
{
	unsigned long irqflags;

	if (!rdev->ddev->irq_enabled)
		return;

	if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
		spin_lock_irqsave(&rdev->irq.lock, irqflags);
		radeon_irq_set(rdev);
		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	}
}

/**
 * radeon_irq_kms_sw_irq_put - disable software interrupt
 *
 * @rdev: radeon device pointer
 * @ring: ring whose interrupt you want to disable
 *
 * Disables the software interrupt for a specific ring (all asics).
 * The software interrupt is generally used to signal a fence on
 * a particular ring.
 */
void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
{
	unsigned long irqflags;

	if (!rdev->ddev->irq_enabled)
		return;

	if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
		spin_lock_irqsave(&rdev->irq.lock, irqflags);
		radeon_irq_set(rdev);
		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	}
}

/**
 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
 *
 * @rdev: radeon device pointer
 * @crtc: crtc whose interrupt you want to enable
 *
 * Enables the pageflip interrupt for a specific crtc (all asics).
 * For pageflips we use the vblank interrupt source.
 */
void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
{
	unsigned long irqflags;

	if (crtc < 0 || crtc >= rdev->num_crtc)
		return;

	if (!rdev->ddev->irq_enabled)
		return;

	if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
		spin_lock_irqsave(&rdev->irq.lock, irqflags);
		radeon_irq_set(rdev);
		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	}
}

/**
 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
 *
 * @rdev: radeon device pointer
 * @crtc: crtc whose interrupt you want to disable
 *
 * Disables the pageflip interrupt for a specific crtc (all asics).
 * For pageflips we use the vblank interrupt source.
 */
void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
{
	unsigned long irqflags;

	if (crtc < 0 || crtc >= rdev->num_crtc)
		return;

	if (!rdev->ddev->irq_enabled)
		return;

	if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
		spin_lock_irqsave(&rdev->irq.lock, irqflags);
		radeon_irq_set(rdev);
		spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	}
}

/**
 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
 *
 * @rdev: radeon device pointer
 * @block: afmt block whose interrupt you want to enable
 *
 * Enables the afmt change interrupt for a specific afmt block (all asics).
 */
void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
{
	unsigned long irqflags;

	if (!rdev->ddev->irq_enabled)
		return;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	rdev->irq.afmt[block] = true;
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);

}

/**
 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
 *
 * @rdev: radeon device pointer
 * @block: afmt block whose interrupt you want to disable
 *
 * Disables the afmt change interrupt for a specific afmt block (all asics).
 */
void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
{
	unsigned long irqflags;

	if (!rdev->ddev->irq_enabled)
		return;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	rdev->irq.afmt[block] = false;
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}

/**
 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
 *
 * @rdev: radeon device pointer
 * @hpd_mask: mask of hpd pins you want to enable.
 *
 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
 */
void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
{
	unsigned long irqflags;
	int i;

	if (!rdev->ddev->irq_enabled)
		return;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
		rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}

/**
 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
 *
 * @rdev: radeon device pointer
 * @hpd_mask: mask of hpd pins you want to disable.
 *
 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
 */
void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
{
	unsigned long irqflags;
	int i;

	if (!rdev->ddev->irq_enabled)
		return;

	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
		rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
	radeon_irq_set(rdev);
	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
Commit	Line	Data
771fe6b9 JG	1	/*
	2	* Copyright 2008 Advanced Micro Devices, Inc.
	3	* Copyright 2008 Red Hat Inc.
	4	* Copyright 2009 Jerome Glisse.
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the "Software"),
	8	* to deal in the Software without restriction, including without limitation
	9	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	10	* and/or sell copies of the Software, and to permit persons to whom the
	11	* Software is furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	20	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	21	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	22	* OTHER DEALINGS IN THE SOFTWARE.
	23	*
	24	* Authors: Dave Airlie
	25	* Alex Deucher
	26	* Jerome Glisse
	27	*/
760285e7 DH	28	#include <drm/drmP.h>
	29	#include <drm/drm_crtc_helper.h>
	30	#include <drm/radeon_drm.h>
771fe6b9	31	#include "radeon_reg.h"
771fe6b9 JG	32	#include "radeon.h"
	33	#include "atom.h"
	34
fb98257a CK	35	#define RADEON_WAIT_IDLE_TIMEOUT 200
fb98257a CK	36
b73ba98d AD	37	/**
	38	* radeon_driver_irq_handler_kms - irq handler for KMS
	39	*
	40	* @DRM_IRQ_ARGS: args
	41	*
	42	* This is the irq handler for the radeon KMS driver (all asics).
	43	* radeon_irq_process is a macro that points to the per-asic
	44	* irq handler callback.
	45	*/
771fe6b9 JG	46	irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
	47	{
	48	struct drm_device dev = (struct drm_device ) arg;
	49	struct radeon_device *rdev = dev->dev_private;
	50
	51	return radeon_irq_process(rdev);
	52	}
	53
d4877cf2 AD	54	/*
	55	* Handle hotplug events outside the interrupt handler proper.
	56	*/
b73ba98d AD	57	/**
	58	* radeon_hotplug_work_func - display hotplug work handler
	59	*
	60	* @work: work struct
	61	*
	62	* This is the hot plug event work handler (all asics).
	63	* The work gets scheduled from the irq handler if there
	64	* was a hot plug interrupt. It walks the connector table
	65	* and calls the hotplug handler for each one, then sends
	66	* a drm hotplug event to alert userspace.
	67	*/
d4877cf2 AD	68	static void radeon_hotplug_work_func(struct work_struct *work)
	69	{
	70	struct radeon_device *rdev = container_of(work, struct radeon_device,
	71	hotplug_work);
	72	struct drm_device *dev = rdev->ddev;
	73	struct drm_mode_config *mode_config = &dev->mode_config;
	74	struct drm_connector *connector;
	75
	76	if (mode_config->num_connector) {
	77	list_for_each_entry(connector, &mode_config->connector_list, head)
	78	radeon_connector_hotplug(connector);
	79	}
	80	/* Just fire off a uevent and let userspace tell us what to do */
eb1f8e4f	81	drm_helper_hpd_irq_event(dev);
d4877cf2 AD	82	}
d4877cf2 AD	83
b73ba98d AD	84	/**
	85	* radeon_driver_irq_preinstall_kms - drm irq preinstall callback
	86	*
	87	* @dev: drm dev pointer
	88	*
	89	* Gets the hw ready to enable irqs (all asics).
	90	* This function disables all interrupt sources on the GPU.
	91	*/
771fe6b9 JG	92	void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
	93	{
	94	struct radeon_device *rdev = dev->dev_private;
fb98257a	95	unsigned long irqflags;
771fe6b9 JG	96	unsigned i;
771fe6b9 JG	97
fb98257a	98	spin_lock_irqsave(&rdev->irq.lock, irqflags);
771fe6b9	99	/* Disable all interrupts */
1b37078b	100	for (i = 0; i < RADEON_NUM_RINGS; i++)
736fc37f	101	atomic_set(&rdev->irq.ring_int[i], 0);
54bd5206	102	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
9e7b414e	103	rdev->irq.hpd[i] = false;
54bd5206 IH	104	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
54bd5206 IH	105	rdev->irq.crtc_vblank_int[i] = false;
736fc37f	106	atomic_set(&rdev->irq.pflip[i], 0);
f122c610	107	rdev->irq.afmt[i] = false;
6f34be50	108	}
771fe6b9	109	radeon_irq_set(rdev);
fb98257a	110	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
771fe6b9 JG	111	/* Clear bits */
	112	radeon_irq_process(rdev);
	113	}
	114
b73ba98d AD	115	/**
	116	* radeon_driver_irq_postinstall_kms - drm irq preinstall callback
	117	*
	118	* @dev: drm dev pointer
	119	*
	120	* Handles stuff to be done after enabling irqs (all asics).
	121	* Returns 0 on success.
	122	*/
771fe6b9 JG	123	int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
771fe6b9 JG	124	{
771fe6b9	125	dev->max_vblank_count = 0x001fffff;
771fe6b9 JG	126	return 0;
	127	}
	128
b73ba98d AD	129	/**
	130	* radeon_driver_irq_uninstall_kms - drm irq uninstall callback
	131	*
	132	* @dev: drm dev pointer
	133	*
	134	* This function disables all interrupt sources on the GPU (all asics).
	135	*/
771fe6b9 JG	136	void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
	137	{
	138	struct radeon_device *rdev = dev->dev_private;
fb98257a	139	unsigned long irqflags;
771fe6b9 JG	140	unsigned i;
	141
	142	if (rdev == NULL) {
	143	return;
	144	}
fb98257a	145	spin_lock_irqsave(&rdev->irq.lock, irqflags);
771fe6b9	146	/* Disable all interrupts */
1b37078b	147	for (i = 0; i < RADEON_NUM_RINGS; i++)
736fc37f	148	atomic_set(&rdev->irq.ring_int[i], 0);
54bd5206	149	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
003e69f9	150	rdev->irq.hpd[i] = false;
54bd5206 IH	151	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
54bd5206 IH	152	rdev->irq.crtc_vblank_int[i] = false;
736fc37f	153	atomic_set(&rdev->irq.pflip[i], 0);
f122c610	154	rdev->irq.afmt[i] = false;
6f34be50	155	}
771fe6b9	156	radeon_irq_set(rdev);
fb98257a	157	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
771fe6b9 JG	158	}
771fe6b9 JG	159
b73ba98d AD	160	/**
	161	* radeon_msi_ok - asic specific msi checks
	162	*
	163	* @rdev: radeon device pointer
	164	*
	165	* Handles asic specific MSI checks to determine if
	166	* MSIs should be enabled on a particular chip (all asics).
	167	* Returns true if MSIs should be enabled, false if MSIs
	168	* should not be enabled.
	169	*/
8f6c25c5 AD	170	static bool radeon_msi_ok(struct radeon_device *rdev)
	171	{
	172	/* RV370/RV380 was first asic with MSI support */
	173	if (rdev->family < CHIP_RV380)
	174	return false;
	175
	176	/* MSIs don't work on AGP */
	177	if (rdev->flags & RADEON_IS_AGP)
	178	return false;
	179
a18cee15 AD	180	/* force MSI on */
	181	if (radeon_msi == 1)
	182	return true;
	183	else if (radeon_msi == 0)
	184	return false;
	185
b362105f AD	186	/* Quirks */
	187	/* HP RS690 only seems to work with MSIs. */
	188	if ((rdev->pdev->device == 0x791f) &&
	189	(rdev->pdev->subsystem_vendor == 0x103c) &&
	190	(rdev->pdev->subsystem_device == 0x30c2))
	191	return true;
	192
44517c44 AD	193	/* Dell RS690 only seems to work with MSIs. */
	194	if ((rdev->pdev->device == 0x791f) &&
	195	(rdev->pdev->subsystem_vendor == 0x1028) &&
	196	(rdev->pdev->subsystem_device == 0x01fc))
	197	return true;
	198
01e718ec AD	199	/* Dell RS690 only seems to work with MSIs. */
	200	if ((rdev->pdev->device == 0x791f) &&
	201	(rdev->pdev->subsystem_vendor == 0x1028) &&
	202	(rdev->pdev->subsystem_device == 0x01fd))
	203	return true;
	204
3a6d59df AD	205	/* Gateway RS690 only seems to work with MSIs. */
	206	if ((rdev->pdev->device == 0x791f) &&
	207	(rdev->pdev->subsystem_vendor == 0x107b) &&
	208	(rdev->pdev->subsystem_device == 0x0185))
	209	return true;
	210
fb6ca6d1 AD	211	/* try and enable MSIs by default on all RS690s */
	212	if (rdev->family == CHIP_RS690)
	213	return true;
	214
16a5e32b DA	215	/* RV515 seems to have MSI issues where it loses
	216	* MSI rearms occasionally. This leads to lockups and freezes.
	217	* disable it by default.
	218	*/
	219	if (rdev->family == CHIP_RV515)
	220	return false;
8f6c25c5 AD	221	if (rdev->flags & RADEON_IS_IGP) {
	222	/* APUs work fine with MSIs */
	223	if (rdev->family >= CHIP_PALM)
	224	return true;
	225	/* lots of IGPs have problems with MSIs */
	226	return false;
	227	}
	228
	229	return true;
	230	}
	231
b73ba98d AD	232	/**
	233	* radeon_irq_kms_init - init driver interrupt info
	234	*
	235	* @rdev: radeon device pointer
	236	*
	237	* Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
	238	* Returns 0 for success, error for failure.
	239	*/
771fe6b9 JG	240	int radeon_irq_kms_init(struct radeon_device *rdev)
	241	{
	242	int r = 0;
	243
32c87fca	244	INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
f122c610	245	INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
32c87fca	246
fb98257a	247	spin_lock_init(&rdev->irq.lock);
9e7b414e	248	r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
771fe6b9 JG	249	if (r) {
	250	return r;
	251	}
3e5cb98d AD	252	/* enable msi */
3e5cb98d AD	253	rdev->msi_enabled = 0;
8f6c25c5 AD	254
8f6c25c5 AD	255	if (radeon_msi_ok(rdev)) {
3e5cb98d	256	int ret = pci_enable_msi(rdev->pdev);
d8f60cfc	257	if (!ret) {
3e5cb98d	258	rdev->msi_enabled = 1;
da7be684	259	dev_info(rdev->dev, "radeon: using MSI.\n");
d8f60cfc	260	}
3e5cb98d	261	}
771fe6b9	262	rdev->irq.installed = true;
003e69f9 JG	263	r = drm_irq_install(rdev->ddev);
	264	if (r) {
	265	rdev->irq.installed = false;
	266	return r;
	267	}
771fe6b9 JG	268	DRM_INFO("radeon: irq initialized.\n");
	269	return 0;
	270	}
	271
b73ba98d	272	/**
cf2fbdd2	273	* radeon_irq_kms_fini - tear down driver interrupt info
b73ba98d AD	274	*
	275	* @rdev: radeon device pointer
	276	*
	277	* Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
	278	*/
771fe6b9 JG	279	void radeon_irq_kms_fini(struct radeon_device *rdev)
771fe6b9 JG	280	{
003e69f9	281	drm_vblank_cleanup(rdev->ddev);
771fe6b9	282	if (rdev->irq.installed) {
771fe6b9	283	drm_irq_uninstall(rdev->ddev);
003e69f9	284	rdev->irq.installed = false;
3e5cb98d AD	285	if (rdev->msi_enabled)
3e5cb98d AD	286	pci_disable_msi(rdev->pdev);
771fe6b9	287	}
43829731	288	flush_work(&rdev->hotplug_work);
771fe6b9	289	}
1614f8b1	290
b73ba98d AD	291	/**
	292	* radeon_irq_kms_sw_irq_get - enable software interrupt
	293	*
	294	* @rdev: radeon device pointer
	295	* @ring: ring whose interrupt you want to enable
	296	*
	297	* Enables the software interrupt for a specific ring (all asics).
	298	* The software interrupt is generally used to signal a fence on
	299	* a particular ring.
	300	*/
1b37078b	301	void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
1614f8b1 DA	302	{
	303	unsigned long irqflags;
	304
736fc37f CK	305	if (!rdev->ddev->irq_enabled)
	306	return;
	307
	308	if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
	309	spin_lock_irqsave(&rdev->irq.lock, irqflags);
1614f8b1	310	radeon_irq_set(rdev);
736fc37f	311	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
1614f8b1	312	}
1614f8b1 DA	313	}
1614f8b1 DA	314
b73ba98d AD	315	/**
	316	* radeon_irq_kms_sw_irq_put - disable software interrupt
	317	*
	318	* @rdev: radeon device pointer
	319	* @ring: ring whose interrupt you want to disable
	320	*
	321	* Disables the software interrupt for a specific ring (all asics).
	322	* The software interrupt is generally used to signal a fence on
	323	* a particular ring.
	324	*/
1b37078b	325	void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
1614f8b1 DA	326	{
	327	unsigned long irqflags;
	328
736fc37f CK	329	if (!rdev->ddev->irq_enabled)
	330	return;
	331
	332	if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
	333	spin_lock_irqsave(&rdev->irq.lock, irqflags);
1614f8b1	334	radeon_irq_set(rdev);
736fc37f	335	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
1614f8b1	336	}
1614f8b1 DA	337	}
1614f8b1 DA	338
b73ba98d AD	339	/**
	340	* radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
	341	*
	342	* @rdev: radeon device pointer
	343	* @crtc: crtc whose interrupt you want to enable
	344	*
	345	* Enables the pageflip interrupt for a specific crtc (all asics).
	346	* For pageflips we use the vblank interrupt source.
	347	*/
6f34be50 AD	348	void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
	349	{
	350	unsigned long irqflags;
	351
	352	if (crtc < 0 \|\| crtc >= rdev->num_crtc)
	353	return;
	354
736fc37f CK	355	if (!rdev->ddev->irq_enabled)
	356	return;
	357
	358	if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
	359	spin_lock_irqsave(&rdev->irq.lock, irqflags);
6f34be50	360	radeon_irq_set(rdev);
736fc37f	361	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
6f34be50	362	}
6f34be50 AD	363	}
6f34be50 AD	364
b73ba98d AD	365	/**
	366	* radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
	367	*
	368	* @rdev: radeon device pointer
	369	* @crtc: crtc whose interrupt you want to disable
	370	*
	371	* Disables the pageflip interrupt for a specific crtc (all asics).
	372	* For pageflips we use the vblank interrupt source.
	373	*/
6f34be50 AD	374	void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
	375	{
	376	unsigned long irqflags;
	377
	378	if (crtc < 0 \|\| crtc >= rdev->num_crtc)
	379	return;
	380
736fc37f CK	381	if (!rdev->ddev->irq_enabled)
	382	return;
	383
	384	if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
	385	spin_lock_irqsave(&rdev->irq.lock, irqflags);
6f34be50	386	radeon_irq_set(rdev);
736fc37f	387	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
6f34be50	388	}
6f34be50 AD	389	}
6f34be50 AD	390
b73ba98d AD	391	/**
	392	* radeon_irq_kms_enable_afmt - enable audio format change interrupt
	393	*
	394	* @rdev: radeon device pointer
	395	* @block: afmt block whose interrupt you want to enable
	396	*
	397	* Enables the afmt change interrupt for a specific afmt block (all asics).
	398	*/
fb98257a CK	399	void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
	400	{
	401	unsigned long irqflags;
	402
cc9945bf AD	403	if (!rdev->ddev->irq_enabled)
	404	return;
	405
fb98257a CK	406	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	407	rdev->irq.afmt[block] = true;
	408	radeon_irq_set(rdev);
	409	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	410
	411	}
	412
b73ba98d AD	413	/**
	414	* radeon_irq_kms_disable_afmt - disable audio format change interrupt
	415	*
	416	* @rdev: radeon device pointer
	417	* @block: afmt block whose interrupt you want to disable
	418	*
	419	* Disables the afmt change interrupt for a specific afmt block (all asics).
	420	*/
fb98257a CK	421	void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
	422	{
	423	unsigned long irqflags;
	424
cc9945bf AD	425	if (!rdev->ddev->irq_enabled)
	426	return;
	427
fb98257a CK	428	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	429	rdev->irq.afmt[block] = false;
	430	radeon_irq_set(rdev);
	431	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	432	}
	433
b73ba98d AD	434	/**
	435	* radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
	436	*
	437	* @rdev: radeon device pointer
	438	* @hpd_mask: mask of hpd pins you want to enable.
	439	*
	440	* Enables the hotplug detect interrupt for a specific hpd pin (all asics).
	441	*/
fb98257a CK	442	void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
	443	{
	444	unsigned long irqflags;
	445	int i;
	446
cc9945bf AD	447	if (!rdev->ddev->irq_enabled)
	448	return;
	449
fb98257a CK	450	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	451	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
	452	rdev->irq.hpd[i] \|= !!(hpd_mask & (1 << i));
	453	radeon_irq_set(rdev);
	454	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	455	}
	456
b73ba98d AD	457	/**
	458	* radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
	459	*
	460	* @rdev: radeon device pointer
	461	* @hpd_mask: mask of hpd pins you want to disable.
	462	*
	463	* Disables the hotplug detect interrupt for a specific hpd pin (all asics).
	464	*/
fb98257a CK	465	void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
	466	{
	467	unsigned long irqflags;
	468	int i;
	469
cc9945bf AD	470	if (!rdev->ddev->irq_enabled)
	471	return;
	472
fb98257a CK	473	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	474	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
	475	rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
	476	radeon_irq_set(rdev);
	477	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	478	}
	479