[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"

#include <linux/pm_runtime.h>

#define RADEON_WAIT_IDLE_TIMEOUT 200

/**
 * radeon_driver_irq_handler_kms - irq handler for KMS
 *
 * @int irq, void *arg: 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(int irq, void *arg)
{
	struct drm_device *dev = (struct drm_device *) arg;
	struct radeon_device *rdev = dev->dev_private;
	irqreturn_t ret;

	ret = radeon_irq_process(rdev);
	if (ret == IRQ_HANDLED)
		pm_runtime_mark_last_busy(dev->dev);
	return ret;
}

/*
 * 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);
	rdev->irq.dpm_thermal = false;
	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);
	rdev->irq.dpm_thermal = false;
	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;

	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");
		}
	}

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

	rdev->irq.installed = true;
	r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
	if (r) {
		rdev->irq.installed = false;
		flush_work(&rdev->hotplug_work);
		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
10ebc0bc DA	35	#include <linux/pm_runtime.h>
10ebc0bc DA	36
fb98257a CK	37	#define RADEON_WAIT_IDLE_TIMEOUT 200
fb98257a CK	38
b73ba98d AD	39	/**
	40	* radeon_driver_irq_handler_kms - irq handler for KMS
	41	*
e9f0d76f	42	* @int irq, void *arg: args
b73ba98d AD	43	*
	44	* This is the irq handler for the radeon KMS driver (all asics).
	45	* radeon_irq_process is a macro that points to the per-asic
	46	* irq handler callback.
	47	*/
e9f0d76f	48	irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
771fe6b9 JG	49	{
	50	struct drm_device dev = (struct drm_device ) arg;
	51	struct radeon_device *rdev = dev->dev_private;
10ebc0bc	52	irqreturn_t ret;
771fe6b9	53
10ebc0bc DA	54	ret = radeon_irq_process(rdev);
	55	if (ret == IRQ_HANDLED)
	56	pm_runtime_mark_last_busy(dev->dev);
	57	return ret;
771fe6b9 JG	58	}
771fe6b9 JG	59
d4877cf2 AD	60	/*
	61	* Handle hotplug events outside the interrupt handler proper.
	62	*/
b73ba98d AD	63	/**
	64	* radeon_hotplug_work_func - display hotplug work handler
	65	*
	66	* @work: work struct
	67	*
	68	* This is the hot plug event work handler (all asics).
	69	* The work gets scheduled from the irq handler if there
	70	* was a hot plug interrupt. It walks the connector table
	71	* and calls the hotplug handler for each one, then sends
	72	* a drm hotplug event to alert userspace.
	73	*/
d4877cf2 AD	74	static void radeon_hotplug_work_func(struct work_struct *work)
	75	{
	76	struct radeon_device *rdev = container_of(work, struct radeon_device,
	77	hotplug_work);
	78	struct drm_device *dev = rdev->ddev;
	79	struct drm_mode_config *mode_config = &dev->mode_config;
	80	struct drm_connector *connector;
	81
	82	if (mode_config->num_connector) {
	83	list_for_each_entry(connector, &mode_config->connector_list, head)
	84	radeon_connector_hotplug(connector);
	85	}
	86	/* Just fire off a uevent and let userspace tell us what to do */
eb1f8e4f	87	drm_helper_hpd_irq_event(dev);
d4877cf2 AD	88	}
d4877cf2 AD	89
b73ba98d AD	90	/**
	91	* radeon_driver_irq_preinstall_kms - drm irq preinstall callback
	92	*
	93	* @dev: drm dev pointer
	94	*
	95	* Gets the hw ready to enable irqs (all asics).
	96	* This function disables all interrupt sources on the GPU.
	97	*/
771fe6b9 JG	98	void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
	99	{
	100	struct radeon_device *rdev = dev->dev_private;
fb98257a	101	unsigned long irqflags;
771fe6b9 JG	102	unsigned i;
771fe6b9 JG	103
fb98257a	104	spin_lock_irqsave(&rdev->irq.lock, irqflags);
771fe6b9	105	/* Disable all interrupts */
1b37078b	106	for (i = 0; i < RADEON_NUM_RINGS; i++)
736fc37f	107	atomic_set(&rdev->irq.ring_int[i], 0);
4a6369e9	108	rdev->irq.dpm_thermal = false;
54bd5206	109	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
9e7b414e	110	rdev->irq.hpd[i] = false;
54bd5206 IH	111	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
54bd5206 IH	112	rdev->irq.crtc_vblank_int[i] = false;
736fc37f	113	atomic_set(&rdev->irq.pflip[i], 0);
f122c610	114	rdev->irq.afmt[i] = false;
6f34be50	115	}
771fe6b9	116	radeon_irq_set(rdev);
fb98257a	117	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
771fe6b9 JG	118	/* Clear bits */
	119	radeon_irq_process(rdev);
	120	}
	121
b73ba98d AD	122	/**
	123	* radeon_driver_irq_postinstall_kms - drm irq preinstall callback
	124	*
	125	* @dev: drm dev pointer
	126	*
	127	* Handles stuff to be done after enabling irqs (all asics).
	128	* Returns 0 on success.
	129	*/
771fe6b9 JG	130	int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
771fe6b9 JG	131	{
771fe6b9	132	dev->max_vblank_count = 0x001fffff;
771fe6b9 JG	133	return 0;
	134	}
	135
b73ba98d AD	136	/**
	137	* radeon_driver_irq_uninstall_kms - drm irq uninstall callback
	138	*
	139	* @dev: drm dev pointer
	140	*
	141	* This function disables all interrupt sources on the GPU (all asics).
	142	*/
771fe6b9 JG	143	void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
	144	{
	145	struct radeon_device *rdev = dev->dev_private;
fb98257a	146	unsigned long irqflags;
771fe6b9 JG	147	unsigned i;
	148
	149	if (rdev == NULL) {
	150	return;
	151	}
fb98257a	152	spin_lock_irqsave(&rdev->irq.lock, irqflags);
771fe6b9	153	/* Disable all interrupts */
1b37078b	154	for (i = 0; i < RADEON_NUM_RINGS; i++)
736fc37f	155	atomic_set(&rdev->irq.ring_int[i], 0);
4a6369e9	156	rdev->irq.dpm_thermal = false;
54bd5206	157	for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
003e69f9	158	rdev->irq.hpd[i] = false;
54bd5206 IH	159	for (i = 0; i < RADEON_MAX_CRTCS; i++) {
54bd5206 IH	160	rdev->irq.crtc_vblank_int[i] = false;
736fc37f	161	atomic_set(&rdev->irq.pflip[i], 0);
f122c610	162	rdev->irq.afmt[i] = false;
6f34be50	163	}
771fe6b9	164	radeon_irq_set(rdev);
fb98257a	165	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
771fe6b9 JG	166	}
771fe6b9 JG	167
b73ba98d AD	168	/**
	169	* radeon_msi_ok - asic specific msi checks
	170	*
	171	* @rdev: radeon device pointer
	172	*
	173	* Handles asic specific MSI checks to determine if
	174	* MSIs should be enabled on a particular chip (all asics).
	175	* Returns true if MSIs should be enabled, false if MSIs
	176	* should not be enabled.
	177	*/
8f6c25c5 AD	178	static bool radeon_msi_ok(struct radeon_device *rdev)
	179	{
	180	/* RV370/RV380 was first asic with MSI support */
	181	if (rdev->family < CHIP_RV380)
	182	return false;
	183
	184	/* MSIs don't work on AGP */
	185	if (rdev->flags & RADEON_IS_AGP)
	186	return false;
	187
a18cee15 AD	188	/* force MSI on */
	189	if (radeon_msi == 1)
	190	return true;
	191	else if (radeon_msi == 0)
	192	return false;
	193
b362105f AD	194	/* Quirks */
	195	/* HP RS690 only seems to work with MSIs. */
	196	if ((rdev->pdev->device == 0x791f) &&
	197	(rdev->pdev->subsystem_vendor == 0x103c) &&
	198	(rdev->pdev->subsystem_device == 0x30c2))
	199	return true;
	200
44517c44 AD	201	/* Dell RS690 only seems to work with MSIs. */
	202	if ((rdev->pdev->device == 0x791f) &&
	203	(rdev->pdev->subsystem_vendor == 0x1028) &&
	204	(rdev->pdev->subsystem_device == 0x01fc))
	205	return true;
	206
01e718ec AD	207	/* Dell RS690 only seems to work with MSIs. */
	208	if ((rdev->pdev->device == 0x791f) &&
	209	(rdev->pdev->subsystem_vendor == 0x1028) &&
	210	(rdev->pdev->subsystem_device == 0x01fd))
	211	return true;
	212
3a6d59df AD	213	/* Gateway RS690 only seems to work with MSIs. */
	214	if ((rdev->pdev->device == 0x791f) &&
	215	(rdev->pdev->subsystem_vendor == 0x107b) &&
	216	(rdev->pdev->subsystem_device == 0x0185))
	217	return true;
	218
fb6ca6d1 AD	219	/* try and enable MSIs by default on all RS690s */
	220	if (rdev->family == CHIP_RS690)
	221	return true;
	222
16a5e32b DA	223	/* RV515 seems to have MSI issues where it loses
	224	* MSI rearms occasionally. This leads to lockups and freezes.
	225	* disable it by default.
	226	*/
	227	if (rdev->family == CHIP_RV515)
	228	return false;
8f6c25c5 AD	229	if (rdev->flags & RADEON_IS_IGP) {
	230	/* APUs work fine with MSIs */
	231	if (rdev->family >= CHIP_PALM)
	232	return true;
	233	/* lots of IGPs have problems with MSIs */
	234	return false;
	235	}
	236
	237	return true;
	238	}
	239
b73ba98d AD	240	/**
	241	* radeon_irq_kms_init - init driver interrupt info
	242	*
	243	* @rdev: radeon device pointer
	244	*
	245	* Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
	246	* Returns 0 for success, error for failure.
	247	*/
771fe6b9 JG	248	int radeon_irq_kms_init(struct radeon_device *rdev)
	249	{
	250	int r = 0;
	251
fb98257a	252	spin_lock_init(&rdev->irq.lock);
9e7b414e	253	r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
771fe6b9 JG	254	if (r) {
	255	return r;
	256	}
3e5cb98d AD	257	/* enable msi */
3e5cb98d AD	258	rdev->msi_enabled = 0;
8f6c25c5 AD	259
8f6c25c5 AD	260	if (radeon_msi_ok(rdev)) {
3e5cb98d	261	int ret = pci_enable_msi(rdev->pdev);
d8f60cfc	262	if (!ret) {
3e5cb98d	263	rdev->msi_enabled = 1;
da7be684	264	dev_info(rdev->dev, "radeon: using MSI.\n");
d8f60cfc	265	}
3e5cb98d	266	}
27c505ca SS	267
	268	INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
	269	INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
27c505ca	270
771fe6b9	271	rdev->irq.installed = true;
bb0f1b5c	272	r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
003e69f9 JG	273	if (r) {
003e69f9 JG	274	rdev->irq.installed = false;
27c505ca	275	flush_work(&rdev->hotplug_work);
003e69f9 JG	276	return r;
003e69f9 JG	277	}
a01c34f7	278
771fe6b9 JG	279	DRM_INFO("radeon: irq initialized.\n");
	280	return 0;
	281	}
	282
b73ba98d	283	/**
cf2fbdd2	284	* radeon_irq_kms_fini - tear down driver interrupt info
b73ba98d AD	285	*
	286	* @rdev: radeon device pointer
	287	*
	288	* Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
	289	*/
771fe6b9 JG	290	void radeon_irq_kms_fini(struct radeon_device *rdev)
771fe6b9 JG	291	{
003e69f9	292	drm_vblank_cleanup(rdev->ddev);
771fe6b9	293	if (rdev->irq.installed) {
771fe6b9	294	drm_irq_uninstall(rdev->ddev);
003e69f9	295	rdev->irq.installed = false;
3e5cb98d AD	296	if (rdev->msi_enabled)
3e5cb98d AD	297	pci_disable_msi(rdev->pdev);
a01c34f7	298	flush_work(&rdev->hotplug_work);
771fe6b9 JG	299	}
771fe6b9 JG	300	}
1614f8b1	301
b73ba98d AD	302	/**
	303	* radeon_irq_kms_sw_irq_get - enable software interrupt
	304	*
	305	* @rdev: radeon device pointer
	306	* @ring: ring whose interrupt you want to enable
	307	*
	308	* Enables the software interrupt for a specific ring (all asics).
	309	* The software interrupt is generally used to signal a fence on
	310	* a particular ring.
	311	*/
1b37078b	312	void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
1614f8b1 DA	313	{
	314	unsigned long irqflags;
	315
736fc37f CK	316	if (!rdev->ddev->irq_enabled)
	317	return;
	318
	319	if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
	320	spin_lock_irqsave(&rdev->irq.lock, irqflags);
1614f8b1	321	radeon_irq_set(rdev);
736fc37f	322	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
1614f8b1	323	}
1614f8b1 DA	324	}
1614f8b1 DA	325
b73ba98d AD	326	/**
	327	* radeon_irq_kms_sw_irq_put - disable software interrupt
	328	*
	329	* @rdev: radeon device pointer
	330	* @ring: ring whose interrupt you want to disable
	331	*
	332	* Disables the software interrupt for a specific ring (all asics).
	333	* The software interrupt is generally used to signal a fence on
	334	* a particular ring.
	335	*/
1b37078b	336	void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
1614f8b1 DA	337	{
	338	unsigned long irqflags;
	339
736fc37f CK	340	if (!rdev->ddev->irq_enabled)
	341	return;
	342
	343	if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
	344	spin_lock_irqsave(&rdev->irq.lock, irqflags);
1614f8b1	345	radeon_irq_set(rdev);
736fc37f	346	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
1614f8b1	347	}
1614f8b1 DA	348	}
1614f8b1 DA	349
b73ba98d AD	350	/**
	351	* radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
	352	*
	353	* @rdev: radeon device pointer
	354	* @crtc: crtc whose interrupt you want to enable
	355	*
	356	* Enables the pageflip interrupt for a specific crtc (all asics).
	357	* For pageflips we use the vblank interrupt source.
	358	*/
6f34be50 AD	359	void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
	360	{
	361	unsigned long irqflags;
	362
	363	if (crtc < 0 \|\| crtc >= rdev->num_crtc)
	364	return;
	365
736fc37f CK	366	if (!rdev->ddev->irq_enabled)
	367	return;
	368
	369	if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
	370	spin_lock_irqsave(&rdev->irq.lock, irqflags);
6f34be50	371	radeon_irq_set(rdev);
736fc37f	372	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
6f34be50	373	}
6f34be50 AD	374	}
6f34be50 AD	375
b73ba98d AD	376	/**
	377	* radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
	378	*
	379	* @rdev: radeon device pointer
	380	* @crtc: crtc whose interrupt you want to disable
	381	*
	382	* Disables the pageflip interrupt for a specific crtc (all asics).
	383	* For pageflips we use the vblank interrupt source.
	384	*/
6f34be50 AD	385	void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
	386	{
	387	unsigned long irqflags;
	388
	389	if (crtc < 0 \|\| crtc >= rdev->num_crtc)
	390	return;
	391
736fc37f CK	392	if (!rdev->ddev->irq_enabled)
	393	return;
	394
	395	if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
	396	spin_lock_irqsave(&rdev->irq.lock, irqflags);
6f34be50	397	radeon_irq_set(rdev);
736fc37f	398	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
6f34be50	399	}
6f34be50 AD	400	}
6f34be50 AD	401
b73ba98d AD	402	/**
	403	* radeon_irq_kms_enable_afmt - enable audio format change interrupt
	404	*
	405	* @rdev: radeon device pointer
	406	* @block: afmt block whose interrupt you want to enable
	407	*
	408	* Enables the afmt change interrupt for a specific afmt block (all asics).
	409	*/
fb98257a CK	410	void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
	411	{
	412	unsigned long irqflags;
	413
cc9945bf AD	414	if (!rdev->ddev->irq_enabled)
	415	return;
	416
fb98257a CK	417	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	418	rdev->irq.afmt[block] = true;
	419	radeon_irq_set(rdev);
	420	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	421
	422	}
	423
b73ba98d AD	424	/**
	425	* radeon_irq_kms_disable_afmt - disable audio format change interrupt
	426	*
	427	* @rdev: radeon device pointer
	428	* @block: afmt block whose interrupt you want to disable
	429	*
	430	* Disables the afmt change interrupt for a specific afmt block (all asics).
	431	*/
fb98257a CK	432	void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
	433	{
	434	unsigned long irqflags;
	435
cc9945bf AD	436	if (!rdev->ddev->irq_enabled)
	437	return;
	438
fb98257a CK	439	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	440	rdev->irq.afmt[block] = false;
	441	radeon_irq_set(rdev);
	442	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	443	}
	444
b73ba98d AD	445	/**
	446	* radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
	447	*
	448	* @rdev: radeon device pointer
	449	* @hpd_mask: mask of hpd pins you want to enable.
	450	*
	451	* Enables the hotplug detect interrupt for a specific hpd pin (all asics).
	452	*/
fb98257a CK	453	void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
	454	{
	455	unsigned long irqflags;
	456	int i;
	457
cc9945bf AD	458	if (!rdev->ddev->irq_enabled)
	459	return;
	460
fb98257a CK	461	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	462	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
	463	rdev->irq.hpd[i] \|= !!(hpd_mask & (1 << i));
	464	radeon_irq_set(rdev);
	465	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	466	}
	467
b73ba98d AD	468	/**
	469	* radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
	470	*
	471	* @rdev: radeon device pointer
	472	* @hpd_mask: mask of hpd pins you want to disable.
	473	*
	474	* Disables the hotplug detect interrupt for a specific hpd pin (all asics).
	475	*/
fb98257a CK	476	void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
	477	{
	478	unsigned long irqflags;
	479	int i;
	480
cc9945bf AD	481	if (!rdev->ddev->irq_enabled)
	482	return;
	483
fb98257a CK	484	spin_lock_irqsave(&rdev->irq.lock, irqflags);
	485	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
	486	rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
	487	radeon_irq_set(rdev);
	488	spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
	489	}
	490