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PCI hotplug: shpchp: use generic pci_configure_slot() 

Use the generic pci_configure_slot() rather than the SHPC-specific
program_fw_provided_values().

Unlike the previous SHPC-specific code, pci_configure_slot() programs PCIe
settings when an _HPX method provides them, so if it's possible to have an
SHPC-managed PCIe device, it 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>
This commit is contained in:
Bjorn Helgaas 2009-09-14 16:35:30 -06:00 committed by Jesse Barnes
parent d569c74d78
commit 11876e52e9
2 changed files with 1 additions and 68 deletions
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7
drivers/pci/hotplug/shpchp.h
View File

@ -188,19 +188,12 @@ static inline const char *slot_name(struct slot *slot)
#ifdef CONFIG_ACPI
#include <linux/pci-acpi.h>
static inline int get_hp_params_from_firmware(struct pci_dev *dev,
struct hotplug_params *hpp)
{
return acpi_get_hp_params_from_firmware(dev, hpp);
}
static inline int get_hp_hw_control_from_firmware(struct pci_dev *dev)
{
u32 flags = OSC_SHPC_NATIVE_HP_CONTROL;
return acpi_get_hp_hw_control_from_firmware(dev, flags);
}
#else
#define get_hp_params_from_firmware(dev, hpp) (-ENODEV)
#define get_hp_hw_control_from_firmware(dev) (0)
#endif

62
drivers/pci/hotplug/shpchp_pci.c
View File

@ -34,66 +34,6 @@
#include "../pci.h"
#include "shpchp.h"
static void program_fw_provided_values(struct pci_dev *dev)
{
u16 pci_cmd, pci_bctl;
struct pci_dev *cdev;
struct hotplug_params hpp;
/* 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;
/* use default values if we can't get them from firmware */
if (get_hp_params_from_firmware(dev, &hpp) ||
!hpp.t0 || (hpp.t0->revision > 1)) {
warn("Could not get hotplug parameters. Use defaults\n");
hpp.t0 = &hpp.type0_data;
hpp.t0->revision = 0;
hpp.t0->cache_line_size = 8;
hpp.t0->latency_timer = 0x40;
hpp.t0->enable_serr = 0;
hpp.t0->enable_perr = 0;
}
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_fw_provided_values(cdev);
}
}
}
int __ref shpchp_configure_device(struct slot *p_slot)
{
struct pci_dev *dev;
@ -153,7 +93,7 @@ int __ref shpchp_configure_device(struct slot *p_slot)
child->subordinate = pci_do_scan_bus(child);
pci_bus_size_bridges(child);
}
program_fw_provided_values(dev);
pci_configure_slot(dev);
pci_dev_put(dev);
}