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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"

#define RADEON_WAIT_IDLE_TIMEOUT 200

#define DRM_IRQ_ARGS            void *arg

struct drm_driver {

    irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);

    void (*irq_preinstall) (struct drm_device *dev);

    int (*irq_postinstall) (struct drm_device *dev);

};

extern int irq_override;

/**

 * 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);

}

/**

 * 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_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 irq_line;

	int r = 0;

    ENTER();

	spin_lock_init(&rdev->irq.lock);

	/* enable msi */

	rdev->msi_enabled = 0;

    rdev->irq.installed = true;

	r = drm_irq_install(rdev->ddev);

    if (r) {

       rdev->irq.installed = false;

       FAIL();

       return r;

   }

	DRM_INFO("radeon: irq initialized.\n");

	return 0;

}

/**

 * radeon_irq_kms_fini - tear down driver interrrupt 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_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;

	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;

	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);

}

static struct drm_driver drm_driver = {

    .irq_preinstall = radeon_driver_irq_preinstall_kms,

    .irq_postinstall = radeon_driver_irq_postinstall_kms,

    .irq_handler = radeon_driver_irq_handler_kms

};

static struct drm_driver *driver = &drm_driver;

int drm_irq_install(struct drm_device *dev)

{

    unsigned long sh_flags = 0;

    int irq_line;

    int ret = 0;

    char *irqname;

    mutex_lock(&dev->struct_mutex);

    /* Driver must have been initialized */

    if (!dev->dev_private) {

            mutex_unlock(&dev->struct_mutex);

            return -EINVAL;

    }

    if (dev->irq_enabled) {

            mutex_unlock(&dev->struct_mutex);

            return -EBUSY;

    }

    dev->irq_enabled = 1;

    mutex_unlock(&dev->struct_mutex);

    irq_line   = drm_dev_to_irq(dev);

    DRM_DEBUG("irq=%d\n", drm_dev_to_irq(dev));

    /* Before installing handler */

    if (driver->irq_preinstall)

            driver->irq_preinstall(dev);

    ret = AttachIntHandler(irq_line, driver->irq_handler, (u32)dev);

    /* After installing handler */

    if (driver->irq_postinstall)

            ret = driver->irq_postinstall(dev);

    if (ret < 0) {

            DRM_ERROR(__FUNCTION__);

    }

    u16_t cmd = PciRead16(dev->pdev->busnr, dev->pdev->devfn, 4);

    cmd&= ~(1<<10);

    PciWrite16(dev->pdev->busnr, dev->pdev->devfn, 4, cmd);

    return ret;

}