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Commit 7a252fe7 authored by Adam Radford's avatar Adam Radford Committed by James Bottomley
Browse files

[SCSI] 3w-9xxx: add power management support 



Signed-off-by: default avatarAdam Radford <aradford@gmail.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 4ab3b73f

drivers/scsi/3w-9xxx.c

+99 −2
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ 
   Written By: Adam Radford <linuxraid@amcc.com>

   Modifications By: Tom Couch <linuxraid@amcc.com>



   Copyright (C) 2004-2008 Applied Micro Circuits Corporation.

   Copyright (C) 2004-2009 Applied Micro Circuits Corporation.



   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by
@@ -75,6 +75,7 @@ 
                 Add MSI support and "use_msi" module parameter.

                 Fix bug in twa_get_param() on 4GB+.

                 Use pci_resource_len() for ioremap().

   2.26.02.012 - Add power management support.

*/



#include <linux/module.h>
@@ -99,7 +100,7 @@ 
#include "3w-9xxx.h"



/* Globals */

#define TW_DRIVER_VERSION "2.26.02.011"

#define TW_DRIVER_VERSION "2.26.02.012"

static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];

static unsigned int twa_device_extension_count;

static int twa_major = -1;
@@ -2182,6 +2183,98 @@ static void twa_remove(struct pci_dev *pdev) 
	twa_device_extension_count--;

} /* End twa_remove() */



#ifdef CONFIG_PM

/* This function is called on PCI suspend */

static int twa_suspend(struct pci_dev *pdev, pm_message_t state)

{

	struct Scsi_Host *host = pci_get_drvdata(pdev);

	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;



	printk(KERN_WARNING "3w-9xxx: Suspending host %d.\n", tw_dev->host->host_no);



	TW_DISABLE_INTERRUPTS(tw_dev);

	free_irq(tw_dev->tw_pci_dev->irq, tw_dev);



	if (test_bit(TW_USING_MSI, &tw_dev->flags))

		pci_disable_msi(pdev);



	/* Tell the card we are shutting down */

	if (twa_initconnection(tw_dev, 1, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL)) {

		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x38, "Connection shutdown failed during suspend");

	} else {

		printk(KERN_WARNING "3w-9xxx: Suspend complete.\n");

	}

	TW_CLEAR_ALL_INTERRUPTS(tw_dev);



	pci_save_state(pdev);

	pci_disable_device(pdev);

	pci_set_power_state(pdev, pci_choose_state(pdev, state));



	return 0;

} /* End twa_suspend() */



/* This function is called on PCI resume */

static int twa_resume(struct pci_dev *pdev)

{

	int retval = 0;

	struct Scsi_Host *host = pci_get_drvdata(pdev);

	TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;



	printk(KERN_WARNING "3w-9xxx: Resuming host %d.\n", tw_dev->host->host_no);

	pci_set_power_state(pdev, PCI_D0);

	pci_enable_wake(pdev, PCI_D0, 0);

	pci_restore_state(pdev);



	retval = pci_enable_device(pdev);

	if (retval) {

		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x39, "Enable device failed during resume");

		return retval;

	}



	pci_set_master(pdev);

	pci_try_set_mwi(pdev);



	if (pci_set_dma_mask(pdev, DMA_64BIT_MASK)

	    || pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))

		if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)

		    || pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)) {

			TW_PRINTK(host, TW_DRIVER, 0x40, "Failed to set dma mask during resume");

			retval = -ENODEV;

			goto out_disable_device;

		}



	/* Initialize the card */

	if (twa_reset_sequence(tw_dev, 0)) {

		retval = -ENODEV;

		goto out_disable_device;

	}



	/* Now setup the interrupt handler */

	retval = request_irq(pdev->irq, twa_interrupt, IRQF_SHARED, "3w-9xxx", tw_dev);

	if (retval) {

		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x42, "Error requesting IRQ during resume");

		retval = -ENODEV;

		goto out_disable_device;

	}



	/* Now enable MSI if enabled */

	if (test_bit(TW_USING_MSI, &tw_dev->flags))

		pci_enable_msi(pdev);



	/* Re-enable interrupts on the card */

	TW_ENABLE_AND_CLEAR_INTERRUPTS(tw_dev);



	printk(KERN_WARNING "3w-9xxx: Resume complete.\n");

	return 0;



out_disable_device:

	scsi_remove_host(host);

	pci_disable_device(pdev);



	return retval;

} /* End twa_resume() */

#endif



/* PCI Devices supported by this driver */

static struct pci_device_id twa_pci_tbl[] __devinitdata = {

	{ PCI_VENDOR_ID_3WARE, PCI_DEVICE_ID_3WARE_9000,
@@ -2202,6 +2295,10 @@ static struct pci_driver twa_driver = { 
	.id_table	= twa_pci_tbl,

	.probe		= twa_probe,

	.remove		= twa_remove,

#ifdef CONFIG_PM

	.suspend	= twa_suspend,

	.resume		= twa_resume,

#endif

	.shutdown	= twa_shutdown

};

drivers/scsi/3w-9xxx.h

+1 −1
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ 
   Written By: Adam Radford <linuxraid@amcc.com>

   Modifications By: Tom Couch <linuxraid@amcc.com>



   Copyright (C) 2004-2008 Applied Micro Circuits Corporation.

   Copyright (C) 2004-2009 Applied Micro Circuits Corporation.



   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by