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/*

 * 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 

#include 

#include 

#include "radeon_reg.h"

#include "radeon.h"

#include "atom.h"

#include 

#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;

    return radeon_irq_process(rdev);

}

/**

 * 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)

{

	struct radeon_device *rdev = dev->dev_private;

	if (ASIC_IS_AVIVO(rdev))

		dev->max_vblank_count = 0x00ffffff;

	else

		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_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;

	}

	rdev->ddev->vblank_disable_allowed = true;

	/* enable msi */

	rdev->msi_enabled = 0;

	rdev->irq.installed = true;

	r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);

    if (r) {

       rdev->irq.installed = false;

       FAIL();

       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);

	}

}

/**

 * 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_get_delayed - 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.

 */

bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)

{

	return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;

}

/**

 * 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_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);

}