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linux-next/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
Rafael J. Wysocki 3a2d5b7001 PM: Introduce PM_EVENT_HIBERNATE callback state 
During the last step of hibernation in the "platform" mode (with the
help of ACPI) we use the suspend code, including the devices'
->suspend() methods, to prepare the system for entering the ACPI S4
system sleep state.

But at least for some devices the operations performed by the
->suspend() callback in that case must be different from its operations
during regular suspend.

For this reason, introduce the new PM event type PM_EVENT_HIBERNATE and
pass it to the device drivers' ->suspend() methods during the last phase
of hibernation, so that they can distinguish this case and handle it as
appropriate.  Modify the drivers that handle PM_EVENT_SUSPEND in a
special way and need to handle PM_EVENT_HIBERNATE in the same way.

These changes are necessary to fix a hibernation regression related
to the i915 driver (ref. http://lkml.org/lkml/2008/2/22/488).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Tested-by: Jeff Chua <jeff.chua.linux@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-23 10:40:04 -08:00

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/*
* Linux driver attachment glue for PCI based controllers.
*
* Copyright (c) 2000-2001 Adaptec Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c#47 $
*/
#include "aic7xxx_osm.h"
#include "aic7xxx_pci.h"
/* Define the macro locally since it's different for different class of chips.
*/
#define ID(x) ID_C(x, PCI_CLASS_STORAGE_SCSI)
static struct pci_device_id ahc_linux_pci_id_table[] = {
/* aic7850 based controllers */
ID(ID_AHA_2902_04_10_15_20C_30C),
/* aic7860 based controllers */
ID(ID_AHA_2930CU),
ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK),
ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK),
ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK),
ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK),
/* aic7870 based controllers */
ID(ID_AHA_2940),
ID(ID_AHA_3940),
ID(ID_AHA_398X),
ID(ID_AHA_2944),
ID(ID_AHA_3944),
ID(ID_AHA_4944),
/* aic7880 based controllers */
ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK),
ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK),
ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK),
ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK),
ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK),
ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK),
ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK),
ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK),
ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK),
/* aic7890 based controllers */
ID(ID_AHA_2930U2),
ID(ID_AHA_2940U2B),
ID(ID_AHA_2940U2_OEM),
ID(ID_AHA_2940U2),
ID(ID_AHA_2950U2B),
ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK),
ID(ID_AAA_131U2),
/* aic7890 based controllers */
ID(ID_AHA_29160),
ID(ID_AHA_29160_CPQ),
ID(ID_AHA_29160N),
ID(ID_AHA_29160C),
ID(ID_AHA_29160B),
ID(ID_AHA_19160B),
ID(ID_AIC7892_ARO),
/* aic7892 based controllers */
ID(ID_AHA_2940U_DUAL),
ID(ID_AHA_3940AU),
ID(ID_AHA_3944AU),
ID(ID_AIC7895_ARO),
ID(ID_AHA_3950U2B_0),
ID(ID_AHA_3950U2B_1),
ID(ID_AHA_3950U2D_0),
ID(ID_AHA_3950U2D_1),
ID(ID_AIC7896_ARO),
/* aic7899 based controllers */
ID(ID_AHA_3960D),
ID(ID_AHA_3960D_CPQ),
ID(ID_AIC7899_ARO),
/* Generic chip probes for devices we don't know exactly. */
ID(ID_AIC7850 & ID_DEV_VENDOR_MASK),
ID(ID_AIC7855 & ID_DEV_VENDOR_MASK),
ID(ID_AIC7859 & ID_DEV_VENDOR_MASK),
ID(ID_AIC7860 & ID_DEV_VENDOR_MASK),
ID(ID_AIC7870 & ID_DEV_VENDOR_MASK),
ID(ID_AIC7880 & ID_DEV_VENDOR_MASK),
ID16(ID_AIC7890 & ID_9005_GENERIC_MASK),
ID16(ID_AIC7892 & ID_9005_GENERIC_MASK),
ID(ID_AIC7895 & ID_DEV_VENDOR_MASK),
ID16(ID_AIC7896 & ID_9005_GENERIC_MASK),
ID16(ID_AIC7899 & ID_9005_GENERIC_MASK),
ID(ID_AIC7810 & ID_DEV_VENDOR_MASK),
ID(ID_AIC7815 & ID_DEV_VENDOR_MASK),
{ 0 }
};
MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);
#ifdef CONFIG_PM
static int
ahc_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
struct ahc_softc *ahc = pci_get_drvdata(pdev);
int rc;
if ((rc = ahc_suspend(ahc)))
return rc;
pci_save_state(pdev);
pci_disable_device(pdev);
if (mesg.event & PM_EVENT_SLEEP)
pci_set_power_state(pdev, PCI_D3hot);
return rc;
}
static int
ahc_linux_pci_dev_resume(struct pci_dev *pdev)
{
struct ahc_softc *ahc = pci_get_drvdata(pdev);
int rc;
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
if ((rc = pci_enable_device(pdev))) {
dev_printk(KERN_ERR, &pdev->dev,
"failed to enable device after resume (%d)\n", rc);
return rc;
}
pci_set_master(pdev);
ahc_pci_resume(ahc);
return (ahc_resume(ahc));
}
#endif
static void
ahc_linux_pci_dev_remove(struct pci_dev *pdev)
{
struct ahc_softc *ahc = pci_get_drvdata(pdev);
u_long s;
if (ahc->platform_data && ahc->platform_data->host)
scsi_remove_host(ahc->platform_data->host);
ahc_lock(ahc, &s);
ahc_intr_enable(ahc, FALSE);
ahc_unlock(ahc, &s);
ahc_free(ahc);
}
static void
ahc_linux_pci_inherit_flags(struct ahc_softc *ahc)
{
struct pci_dev *pdev = ahc->dev_softc, *master_pdev;
unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
master_pdev = pci_get_slot(pdev->bus, master_devfn);
if (master_pdev) {
struct ahc_softc *master = pci_get_drvdata(master_pdev);
if (master) {
ahc->flags &= ~AHC_BIOS_ENABLED;
ahc->flags |= master->flags & AHC_BIOS_ENABLED;
ahc->flags &= ~AHC_PRIMARY_CHANNEL;
ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL;
} else
printk(KERN_ERR "aic7xxx: no multichannel peer found!\n");
pci_dev_put(master_pdev);
}
}
static int
ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
char buf[80];
const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
struct ahc_softc *ahc;
ahc_dev_softc_t pci;
struct ahc_pci_identity *entry;
char *name;
int error;
struct device *dev = &pdev->dev;
pci = pdev;
entry = ahc_find_pci_device(pci);
if (entry == NULL)
return (-ENODEV);
/*
* Allocate a softc for this card and
* set it up for attachment by our
* common detect routine.
*/
sprintf(buf, "ahc_pci:%d:%d:%d",
ahc_get_pci_bus(pci),
ahc_get_pci_slot(pci),
ahc_get_pci_function(pci));
name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
if (name == NULL)
return (-ENOMEM);
strcpy(name, buf);
ahc = ahc_alloc(NULL, name);
if (ahc == NULL)
return (-ENOMEM);
if (pci_enable_device(pdev)) {
ahc_free(ahc);
return (-ENODEV);
}
pci_set_master(pdev);
if (sizeof(dma_addr_t) > 4
&& ahc->features & AHC_LARGE_SCBS
&& dma_set_mask(dev, mask_39bit) == 0
&& dma_get_required_mask(dev) > DMA_32BIT_MASK) {
ahc->flags |= AHC_39BIT_ADDRESSING;
} else {
if (dma_set_mask(dev, DMA_32BIT_MASK)) {
ahc_free(ahc);
printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
return (-ENODEV);
}
}
ahc->dev_softc = pci;
error = ahc_pci_config(ahc, entry);
if (error != 0) {
ahc_free(ahc);
return (-error);
}
/*
* Second Function PCI devices need to inherit some
* settings from function 0.
*/
if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
ahc_linux_pci_inherit_flags(ahc);
pci_set_drvdata(pdev, ahc);
ahc_linux_register_host(ahc, &aic7xxx_driver_template);
return (0);
}
static struct pci_driver aic7xxx_pci_driver = {
.name = "aic7xxx",
.probe = ahc_linux_pci_dev_probe,
#ifdef CONFIG_PM
.suspend = ahc_linux_pci_dev_suspend,
.resume = ahc_linux_pci_dev_resume,
#endif
.remove = ahc_linux_pci_dev_remove,
.id_table = ahc_linux_pci_id_table
};
int
ahc_linux_pci_init(void)
{
return pci_register_driver(&aic7xxx_pci_driver);
}
void
ahc_linux_pci_exit(void)
{
pci_unregister_driver(&aic7xxx_pci_driver);
}
static int
ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
{
if (aic7xxx_allow_memio == 0)
return (ENOMEM);
*base = pci_resource_start(ahc->dev_softc, 0);
if (*base == 0)
return (ENOMEM);
if (request_region(*base, 256, "aic7xxx") == 0)
return (ENOMEM);
return (0);
}
static int
ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
u_long *bus_addr,
uint8_t __iomem **maddr)
{
u_long start;
int error;
error = 0;
start = pci_resource_start(ahc->dev_softc, 1);
if (start != 0) {
*bus_addr = start;
if (request_mem_region(start, 0x1000, "aic7xxx") == 0)
error = ENOMEM;
if (error == 0) {
*maddr = ioremap_nocache(start, 256);
if (*maddr == NULL) {
error = ENOMEM;
release_mem_region(start, 0x1000);
}
}
} else
error = ENOMEM;
return (error);
}
int
ahc_pci_map_registers(struct ahc_softc *ahc)
{
uint32_t command;
u_long base;
uint8_t __iomem *maddr;
int error;
/*
* If its allowed, we prefer memory mapped access.
*/
command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
base = 0;
maddr = NULL;
error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
if (error == 0) {
ahc->platform_data->mem_busaddr = base;
ahc->tag = BUS_SPACE_MEMIO;
ahc->bsh.maddr = maddr;
ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
command | PCIM_CMD_MEMEN, 4);
/*
* Do a quick test to see if memory mapped
* I/O is functioning correctly.
*/
if (ahc_pci_test_register_access(ahc) != 0) {
printf("aic7xxx: PCI Device %d:%d:%d "
"failed memory mapped test. Using PIO.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc));
iounmap(maddr);
release_mem_region(ahc->platform_data->mem_busaddr,
0x1000);
ahc->bsh.maddr = NULL;
maddr = NULL;
} else
command |= PCIM_CMD_MEMEN;
} else {
printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
"unavailable. Cannot memory map device.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
base);
}
/*
* We always prefer memory mapped access.
*/
if (maddr == NULL) {
error = ahc_linux_pci_reserve_io_region(ahc, &base);
if (error == 0) {
ahc->tag = BUS_SPACE_PIO;
ahc->bsh.ioport = base;
command |= PCIM_CMD_PORTEN;
} else {
printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
"unavailable. Cannot map device.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
base);
}
}
ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
return (error);
}
int
ahc_pci_map_int(struct ahc_softc *ahc)
{
int error;
error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
IRQF_SHARED, "aic7xxx", ahc);
if (error == 0)
ahc->platform_data->irq = ahc->dev_softc->irq;
return (-error);
}
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