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

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Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
adam radford 2009-03-09 12:15:01 -08:00 committed by James Bottomley
parent 4ab3b73f85
commit 7a252fe7bc
2 changed files with 100 additions and 3 deletions
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101
drivers/scsi/3w-9xxx.c
View file

@ -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
};

2
drivers/scsi/3w-9xxx.h
View file

@ -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