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[PATCH] acpi_pcihp: Add support for _HPX

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This patch adds support for _HPX (Hot Plug Parameter Extensions)
defined in ACPI3.0a spec.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kenji Kaneshige
2006-05-02 10:57:14 +09:00
committed by Greg Kroah-Hartman
parent aad20cabaa
commit e22b735016
4 changed files with 262 additions and 36 deletions
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31
drivers/pci/hotplug/acpiphp_glue.c
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@@ -287,12 +287,18 @@ static void decode_hpp(struct acpiphp_bridge *bridge)
acpi_status status;
status = acpi_get_hp_params_from_firmware(bridge->pci_bus, &bridge->hpp);
if (ACPI_FAILURE(status)) {
if (ACPI_FAILURE(status) ||
!bridge->hpp.t0 || (bridge->hpp.t0->revision > 1)) {
/* use default numbers */
bridge->hpp.cache_line_size = 0x10;
bridge->hpp.latency_timer = 0x40;
bridge->hpp.enable_serr = 0;
bridge->hpp.enable_perr = 0;
printk(KERN_WARNING
"%s: Could not get hotplug parameters. Use defaults\n",
__FUNCTION__);
bridge->hpp.t0 = &bridge->hpp.type0_data;
bridge->hpp.t0->revision = 0;
bridge->hpp.t0->cache_line_size = 0x10;
bridge->hpp.t0->latency_timer = 0x40;
bridge->hpp.t0->enable_serr = 0;
bridge->hpp.t0->enable_perr = 0;
}
}
@@ -1206,16 +1212,17 @@ static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge)
(dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
return;
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
bridge->hpp.cache_line_size);
bridge->hpp.t0->cache_line_size);
pci_write_config_byte(dev, PCI_LATENCY_TIMER,
bridge->hpp.latency_timer);
bridge->hpp.t0->latency_timer);
pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
if (bridge->hpp.enable_serr)
if (bridge->hpp.t0->enable_serr)
pci_cmd |= PCI_COMMAND_SERR;
else
pci_cmd &= ~PCI_COMMAND_SERR;
if (bridge->hpp.enable_perr)
if (bridge->hpp.t0->enable_perr)
pci_cmd |= PCI_COMMAND_PARITY;
else
pci_cmd &= ~PCI_COMMAND_PARITY;
@@ -1224,13 +1231,13 @@ static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge)
/* Program bridge control value and child devices */
if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER,
bridge->hpp.latency_timer);
bridge->hpp.t0->latency_timer);
pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
if (bridge->hpp.enable_serr)
if (bridge->hpp.t0->enable_serr)
pci_bctl |= PCI_BRIDGE_CTL_SERR;
else
pci_bctl &= ~PCI_BRIDGE_CTL_SERR;
if (bridge->hpp.enable_perr)
if (bridge->hpp.t0->enable_perr)
pci_bctl |= PCI_BRIDGE_CTL_PARITY;
else
pci_bctl &= ~PCI_BRIDGE_CTL_PARITY;