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PCI hotplug: acpiphp: use generic pci_configure_slot() 

Use the generic pci_configure_slot() rather than the acpiphp-specific
decode_hpp() and program_hpp().

Unlike the previous acpiphp-specific code, pci_configure_slot() programs
PCIe settings when an _HPX method provides them, so acpiphp-managed PCIe
devices can now be configured.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Acked-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
hifive-unleashed-5.1
Bjorn Helgaas 2009-09-14 16:35:35 -06:00 committed by Jesse Barnes
parent 11876e52e9
commit e81995bb1c
3 changed files with 7 additions and 87 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/pci/hotplug/acpi_pcihp.c
View File

@ -322,13 +322,12 @@ static acpi_status acpi_run_oshp(acpi_handle handle)
return status;
}
/* acpi_get_hp_params_from_firmware
/* pci_get_hp_params
*
* @dev - the pci_dev for which we want parameters
* @hpp - allocated by the caller
*/
int acpi_get_hp_params_from_firmware(struct pci_dev *dev,
struct hotplug_params *hpp)
int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp)
{
acpi_status status;
acpi_handle handle, phandle;
@ -345,7 +344,7 @@ int acpi_get_hp_params_from_firmware(struct pci_dev *dev,
* _HPP settings apply to all child buses, until another _HPP is
* encountered. If we don't find an _HPP for the input pci dev,
* look for it in the parent device scope since that would apply to
* this pci dev. If we don't find any _HPP, use hardcoded defaults
* this pci dev.
*/
while (handle) {
status = acpi_run_hpx(handle, hpp);
@ -363,7 +362,7 @@ int acpi_get_hp_params_from_firmware(struct pci_dev *dev,
}
return -ENODEV;
}
EXPORT_SYMBOL_GPL(acpi_get_hp_params_from_firmware);
EXPORT_SYMBOL_GPL(pci_get_hp_params);
/**
* acpi_get_hp_hw_control_from_firmware

81
drivers/pci/hotplug/acpiphp_glue.c
View File

@ -271,29 +271,6 @@ static int detect_ejectable_slots(acpi_handle handle)
return found;
}
/* decode ACPI 2.0 _HPP hot plug parameters */
static void decode_hpp(struct pci_dev *dev, struct hotplug_params *hpp)
{
int ret;
ret = acpi_get_hp_params_from_firmware(dev, hpp);
if (ret || !hpp->t0 || (hpp->t0->revision > 1)) {
/* use default numbers */
printk(KERN_WARNING
"%s: Could not get hotplug parameters. Use defaults\n",
__func__);
hpp->t0 = &hpp->type0_data;
hpp->t0->revision = 0;
hpp->t0->cache_line_size = 0x10;
hpp->t0->latency_timer = 0x40;
hpp->t0->enable_serr = 0;
hpp->t0->enable_perr = 0;
}
}
/* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */
static void init_bridge_misc(struct acpiphp_bridge *bridge)
{
@ -1247,66 +1224,12 @@ static int acpiphp_check_bridge(struct acpiphp_bridge *bridge)
return retval;
}
static void program_hpp(struct pci_dev *dev, struct hotplug_params *hpp)
{
u16 pci_cmd, pci_bctl;
struct pci_dev *cdev;
/* Program hpp values for this device */
if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL ||
(dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
return;
if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
return;
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
hpp->t0->cache_line_size);
pci_write_config_byte(dev, PCI_LATENCY_TIMER,
hpp->t0->latency_timer);
pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
if (hpp->t0->enable_serr)
pci_cmd |= PCI_COMMAND_SERR;
else
pci_cmd &= ~PCI_COMMAND_SERR;
if (hpp->t0->enable_perr)
pci_cmd |= PCI_COMMAND_PARITY;
else
pci_cmd &= ~PCI_COMMAND_PARITY;
pci_write_config_word(dev, PCI_COMMAND, pci_cmd);
/* Program bridge control value and child devices */
if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER,
hpp->t0->latency_timer);
pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
if (hpp->t0->enable_serr)
pci_bctl |= PCI_BRIDGE_CTL_SERR;
else
pci_bctl &= ~PCI_BRIDGE_CTL_SERR;
if (hpp->t0->enable_perr)
pci_bctl |= PCI_BRIDGE_CTL_PARITY;
else
pci_bctl &= ~PCI_BRIDGE_CTL_PARITY;
pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl);
if (dev->subordinate) {
list_for_each_entry(cdev, &dev->subordinate->devices,
bus_list)
program_hpp(cdev, hpp);
}
}
}
static void acpiphp_set_hpp_values(struct pci_bus *bus)
{
struct pci_dev *dev;
struct hotplug_params hpp;
list_for_each_entry(dev, &bus->devices, bus_list) {
decode_hpp(dev, &hpp);
program_hpp(dev, &hpp);
}
list_for_each_entry(dev, &bus->devices, bus_list)
pci_configure_slot(dev);
}
/*

4
include/linux/pci_hotplug.h
View File

@ -227,12 +227,10 @@ struct hotplug_params {
#ifdef CONFIG_ACPI
#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>
int acpi_get_hp_params_from_firmware(struct pci_dev *dev,
struct hotplug_params *hpp);
int pci_get_hp_params(struct pci_dev *dev, struct hotplug_params *hpp);
int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags);
int acpi_pci_check_ejectable(struct pci_bus *pbus, acpi_handle handle);
int acpi_pci_detect_ejectable(acpi_handle handle);
#define pci_get_hp_params(dev, hpp) acpi_get_hp_params_from_firmware(dev, hpp)
#else
static inline int pci_get_hp_params(struct pci_dev *dev,
struct hotplug_params *hpp)