[PATCH] shpchp: reduce dependence on ACPI
Reduce the SHPC hotplug driver's dependence on ACPI. We don't
walk the acpi namespace anymore to build a list of bridges and
devices. The remaining interaction with ACPI is to run the
_OSHP method to transition control of hotplug hardware from
system BIOS to the shpc hotplug driver, and to run the _HPP
method to get hotplug device parameters like cache line size,
latency timer and SERR/PERR enable from BIOS.
Note that one of the side effects of this patch is that shpchp
does not enable the hot-added device or its DMA bus mastering
automatically now. It expects the device driver to do that.
This may break some drivers and we will have to fix them as
they are reported.
Signed-off-by: Rajesh Shah <rajesh.shah@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h
index deea56c..1b345ae 100644
--- a/drivers/pci/hotplug/shpchp.h
+++ b/drivers/pci/hotplug/shpchp.h
@@ -122,6 +122,13 @@
u16 vendor_id;
};
+struct hotplug_params {
+ u8 cache_line_size;
+ u8 latency_timer;
+ u8 enable_serr;
+ u8 enable_perr;
+};
+
/* Define AMD SHPC ID */
#define PCI_DEVICE_ID_AMD_GOLAM_7450 0x7450
@@ -192,6 +199,11 @@
extern int shpchp_save_slot_config(struct controller *ctrl, struct pci_func * new_slot);
extern int shpchp_configure_device(struct slot *p_slot);
extern int shpchp_unconfigure_device(struct pci_func* func);
+extern void get_hp_hw_control_from_firmware(struct pci_dev *dev);
+extern void get_hp_params_from_firmware(struct pci_dev *dev,
+ struct hotplug_params *hpp);
+extern int shpchprm_get_physical_slot_number(struct controller *ctrl,
+ u32 *sun, u8 busnum, u8 devnum);
/* Global variables */
diff --git a/drivers/pci/hotplug/shpchp_core.c b/drivers/pci/hotplug/shpchp_core.c
index 8f5da50..e3c0c17 100644
--- a/drivers/pci/hotplug/shpchp_core.c
+++ b/drivers/pci/hotplug/shpchp_core.c
@@ -39,7 +39,6 @@
#include <linux/init.h>
#include <asm/uaccess.h>
#include "shpchp.h"
-#include "shpchprm.h"
/* Global variables */
int shpchp_debug;
@@ -566,16 +565,12 @@
if (retval)
goto error_hpc_init;
- retval = shpchprm_init(PCI);
- if (!retval) {
- retval = pci_register_driver(&shpc_driver);
- dbg("%s: pci_register_driver = %d\n", __FUNCTION__, retval);
- info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
- }
+ retval = pci_register_driver(&shpc_driver);
+ dbg("%s: pci_register_driver = %d\n", __FUNCTION__, retval);
+ info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
error_hpc_init:
if (retval) {
- shpchprm_cleanup();
shpchp_event_stop_thread();
}
return retval;
@@ -586,8 +581,6 @@
dbg("unload_shpchpd()\n");
unload_shpchpd();
- shpchprm_cleanup();
-
dbg("pci_unregister_driver\n");
pci_unregister_driver(&shpc_driver);
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index aa507e4..23dd61c 100644
--- a/drivers/pci/hotplug/shpchp_ctrl.c
+++ b/drivers/pci/hotplug/shpchp_ctrl.c
@@ -40,7 +40,6 @@
#include <linux/pci.h>
#include "../pci.h"
#include "shpchp.h"
-#include "shpchprm.h"
static void interrupt_event_handler(struct controller *ctrl);
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index 8d98410..d55a9a7 100644
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -1566,8 +1566,8 @@
err("Can't get irq %d for the hotplug controller\n", php_ctlr->irq);
goto abort_free_ctlr;
}
- /* Execute OSHP method here */
}
+ get_hp_hw_control_from_firmware(pdev);
dbg("%s: Before adding HPC to HPC list\n", __FUNCTION__);
/* Add this HPC instance into the HPC list */
diff --git a/drivers/pci/hotplug/shpchp_pci.c b/drivers/pci/hotplug/shpchp_pci.c
index 89e4048..6209972 100644
--- a/drivers/pci/hotplug/shpchp_pci.c
+++ b/drivers/pci/hotplug/shpchp_pci.c
@@ -38,6 +38,55 @@
#include "../pci.h"
#include "shpchp.h"
+void program_fw_provided_values(struct pci_dev *dev)
+{
+ u16 pci_cmd, pci_bctl;
+ struct pci_dev *cdev;
+ struct hotplug_params hpp = {0x8, 0x40, 0, 0}; /* defaults */
+
+ /* 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;
+
+ get_hp_params_from_firmware(dev, &hpp);
+
+ pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, hpp.cache_line_size);
+ pci_write_config_byte(dev, PCI_LATENCY_TIMER, hpp.latency_timer);
+ pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
+ if (hpp.enable_serr)
+ pci_cmd |= PCI_COMMAND_SERR;
+ else
+ pci_cmd &= ~PCI_COMMAND_SERR;
+ if (hpp.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.latency_timer);
+ pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
+ if (hpp.enable_serr)
+ pci_bctl |= PCI_BRIDGE_CTL_SERR;
+ else
+ pci_bctl &= ~PCI_BRIDGE_CTL_SERR;
+ if (hpp.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 shpchp_configure_device(struct slot *p_slot)
{
struct pci_dev *dev;
@@ -90,8 +139,7 @@
child->subordinate = pci_do_scan_bus(child);
pci_bus_size_bridges(child);
}
- /* TBD: program firmware provided _HPP values */
- /* program_fw_provided_values(dev); */
+ program_fw_provided_values(dev);
}
pci_bus_assign_resources(parent);
diff --git a/drivers/pci/hotplug/shpchprm.h b/drivers/pci/hotplug/shpchprm.h
deleted file mode 100644
index df474b2..0000000
--- a/drivers/pci/hotplug/shpchprm.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * SHPCHPRM : SHPCHP Resource Manager for ACPI/non-ACPI platform
- *
- * Copyright (C) 1995,2001 Compaq Computer Corporation
- * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2001 IBM Corp.
- * Copyright (C) 2003-2004 Intel Corporation
- *
- * All rights reserved.
- *
- * 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
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
- *
- */
-
-#ifndef _SHPCHPRM_H_
-#define _SHPCHPRM_H_
-
-#ifdef CONFIG_HOTPLUG_PCI_SHPC_PHPRM_LEGACY
-#include "shpchprm_legacy.h"
-#endif
-
-int shpchprm_init(enum php_ctlr_type ct);
-void shpchprm_cleanup(void);
-int shpchprm_set_hpp(struct controller *ctrl, struct pci_func *func, u8 card_type);
-void shpchprm_enable_card(struct controller *ctrl, struct pci_func *func, u8 card_type);
-int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum);
-
-#endif /* _SHPCHPRM_H_ */
diff --git a/drivers/pci/hotplug/shpchprm_acpi.c b/drivers/pci/hotplug/shpchprm_acpi.c
index 3d2f9c5..3be518c 100644
--- a/drivers/pci/hotplug/shpchprm_acpi.c
+++ b/drivers/pci/hotplug/shpchprm_acpi.c
@@ -38,62 +38,11 @@
#include <acpi/acpi_bus.h>
#include <acpi/actypes.h>
#include "shpchp.h"
-#include "shpchprm.h"
-
-#define PCI_MAX_BUS 0x100
-#define ACPI_STA_DEVICE_PRESENT 0x01
#define METHOD_NAME__SUN "_SUN"
#define METHOD_NAME__HPP "_HPP"
#define METHOD_NAME_OSHP "OSHP"
-#define PHP_RES_BUS 0xA0
-#define PHP_RES_IO 0xA1
-#define PHP_RES_MEM 0xA2
-#define PHP_RES_PMEM 0xA3
-
-#define BRIDGE_TYPE_P2P 0x00
-#define BRIDGE_TYPE_HOST 0x01
-
-/* this should go to drivers/acpi/include/ */
-struct acpi__hpp {
- u8 cache_line_size;
- u8 latency_timer;
- u8 enable_serr;
- u8 enable_perr;
-};
-
-struct acpi_php_slot {
- struct acpi_php_slot *next;
- struct acpi_bridge *bridge;
- acpi_handle handle;
- int seg;
- int bus;
- int dev;
- int fun;
- u32 sun;
- void *slot_ops; /* _STA, _EJx, etc */
- struct slot *slot;
-}; /* per func */
-
-struct acpi_bridge {
- struct acpi_bridge *parent;
- struct acpi_bridge *next;
- struct acpi_bridge *child;
- acpi_handle handle;
- int seg;
- int pbus; /* pdev->bus->number */
- int pdevice; /* PCI_SLOT(pdev->devfn) */
- int pfunction; /* PCI_DEVFN(pdev->devfn) */
- int bus; /* pdev->subordinate->number */
- struct acpi__hpp *_hpp;
- struct acpi_php_slot *slots;
- int scanned;
- int type;
-};
-
-static struct acpi_bridge *acpi_bridges_head;
-
static u8 * acpi_path_name( acpi_handle handle)
{
acpi_status status;
@@ -109,82 +58,43 @@
return path_name;
}
-static void acpi_get__hpp ( struct acpi_bridge *ab);
-static void acpi_run_oshp ( struct acpi_bridge *ab);
-
-static int acpi_add_slot_to_php_slots(
- struct acpi_bridge *ab,
- int bus_num,
- acpi_handle handle,
- u32 adr,
- u32 sun
- )
-{
- struct acpi_php_slot *aps;
- static long samesun = -1;
-
- aps = (struct acpi_php_slot *) kmalloc (sizeof(struct acpi_php_slot), GFP_KERNEL);
- if (!aps) {
- err ("acpi_shpchprm: alloc for aps fail\n");
- return -1;
- }
- memset(aps, 0, sizeof(struct acpi_php_slot));
-
- aps->handle = handle;
- aps->bus = bus_num;
- aps->dev = (adr >> 16) & 0xffff;
- aps->fun = adr & 0xffff;
- aps->sun = sun;
-
- aps->next = ab->slots; /* cling to the bridge */
- aps->bridge = ab;
- ab->slots = aps;
-
- ab->scanned += 1;
- if (!ab->_hpp)
- acpi_get__hpp(ab);
-
- acpi_run_oshp(ab);
-
- if (sun != samesun) {
- info("acpi_shpchprm: Slot sun(%x) at s:b:d:f=0x%02x:%02x:%02x:%02x\n", aps->sun, ab->seg,
- aps->bus, aps->dev, aps->fun);
- samesun = sun;
- }
- return 0;
-}
-
-static void acpi_get__hpp ( struct acpi_bridge *ab)
+static acpi_status
+acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
{
acpi_status status;
u8 nui[4];
struct acpi_buffer ret_buf = { 0, NULL};
union acpi_object *ext_obj, *package;
- u8 *path_name = acpi_path_name(ab->handle);
+ u8 *path_name = acpi_path_name(handle);
int i, len = 0;
/* get _hpp */
- status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf);
+ status = acpi_evaluate_object(handle, METHOD_NAME__HPP, NULL, &ret_buf);
switch (status) {
case AE_BUFFER_OVERFLOW:
ret_buf.pointer = kmalloc (ret_buf.length, GFP_KERNEL);
if (!ret_buf.pointer) {
- err ("acpi_shpchprm:%s alloc for _HPP fail\n", path_name);
- return;
+ err ("%s:%s alloc for _HPP fail\n", __FUNCTION__,
+ path_name);
+ return AE_NO_MEMORY;
}
- status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf);
+ status = acpi_evaluate_object(handle, METHOD_NAME__HPP,
+ NULL, &ret_buf);
if (ACPI_SUCCESS(status))
break;
default:
if (ACPI_FAILURE(status)) {
- err("acpi_shpchprm:%s _HPP fail=0x%x\n", path_name, status);
- return;
+ dbg("%s:%s _HPP fail=0x%x\n", __FUNCTION__,
+ path_name, status);
+ return status;
}
}
ext_obj = (union acpi_object *) ret_buf.pointer;
if (ext_obj->type != ACPI_TYPE_PACKAGE) {
- err ("acpi_shpchprm:%s _HPP obj not a package\n", path_name);
+ err ("%s:%s _HPP obj not a package\n", __FUNCTION__,
+ path_name);
+ status = AE_ERROR;
goto free_and_return;
}
@@ -197,553 +107,41 @@
nui[i] = (u8)ext_obj->integer.value;
break;
default:
- err ("acpi_shpchprm:%s _HPP obj type incorrect\n", path_name);
+ err ("%s:%s _HPP obj type incorrect\n", __FUNCTION__,
+ path_name);
+ status = AE_ERROR;
goto free_and_return;
}
}
- ab->_hpp = kmalloc (sizeof (struct acpi__hpp), GFP_KERNEL);
- if (!ab->_hpp) {
- err ("acpi_shpchprm:%s alloc for _HPP failed\n", path_name);
- goto free_and_return;
- }
- memset(ab->_hpp, 0, sizeof(struct acpi__hpp));
+ hpp->cache_line_size = nui[0];
+ hpp->latency_timer = nui[1];
+ hpp->enable_serr = nui[2];
+ hpp->enable_perr = nui[3];
- ab->_hpp->cache_line_size = nui[0];
- ab->_hpp->latency_timer = nui[1];
- ab->_hpp->enable_serr = nui[2];
- ab->_hpp->enable_perr = nui[3];
-
- dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size);
- dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer);
- dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr);
- dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr);
+ dbg(" _HPP: cache_line_size=0x%x\n", hpp->cache_line_size);
+ dbg(" _HPP: latency timer =0x%x\n", hpp->latency_timer);
+ dbg(" _HPP: enable SERR =0x%x\n", hpp->enable_serr);
+ dbg(" _HPP: enable PERR =0x%x\n", hpp->enable_perr);
free_and_return:
kfree(ret_buf.pointer);
+ return status;
}
-static void acpi_run_oshp ( struct acpi_bridge *ab)
+static void acpi_run_oshp(acpi_handle handle)
{
acpi_status status;
- u8 *path_name = acpi_path_name(ab->handle);
+ u8 *path_name = acpi_path_name(handle);
/* run OSHP */
- status = acpi_evaluate_object(ab->handle, METHOD_NAME_OSHP, NULL, NULL);
+ status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL);
if (ACPI_FAILURE(status)) {
- err("acpi_pciehprm:%s OSHP fails=0x%x\n", path_name, status);
- } else
- dbg("acpi_pciehprm:%s OSHP passes =0x%x\n", path_name, status);
- return;
-}
-
-/* find acpi_bridge downword from ab. */
-static struct acpi_bridge *
-find_acpi_bridge_by_bus(
- struct acpi_bridge *ab,
- int seg,
- int bus /* pdev->subordinate->number */
- )
-{
- struct acpi_bridge *lab = NULL;
-
- if (!ab)
- return NULL;
-
- if ((ab->bus == bus) && (ab->seg == seg))
- return ab;
-
- if (ab->child)
- lab = find_acpi_bridge_by_bus(ab->child, seg, bus);
-
- if (!lab)
- if (ab->next)
- lab = find_acpi_bridge_by_bus(ab->next, seg, bus);
-
- return lab;
-}
-
-/*
- * Build a device tree of ACPI PCI Bridges
- */
-static void shpchprm_acpi_register_a_bridge (
- struct acpi_bridge **head,
- struct acpi_bridge *pab, /* parent bridge to which child bridge is added */
- struct acpi_bridge *cab /* child bridge to add */
- )
-{
- struct acpi_bridge *lpab;
- struct acpi_bridge *lcab;
-
- lpab = find_acpi_bridge_by_bus(*head, pab->seg, pab->bus);
- if (!lpab) {
- if (!(pab->type & BRIDGE_TYPE_HOST))
- warn("PCI parent bridge s:b(%x:%x) not in list.\n", pab->seg, pab->bus);
- pab->next = *head;
- *head = pab;
- lpab = pab;
- }
-
- if ((cab->type & BRIDGE_TYPE_HOST) && (pab == cab))
- return;
-
- lcab = find_acpi_bridge_by_bus(*head, cab->seg, cab->bus);
- if (lcab) {
- if ((pab->bus != lcab->parent->bus) || (lcab->bus != cab->bus))
- err("PCI child bridge s:b(%x:%x) in list with diff parent.\n", cab->seg, cab->bus);
- return;
- } else
- lcab = cab;
-
- lcab->parent = lpab;
- lcab->next = lpab->child;
- lpab->child = lcab;
-}
-
-static acpi_status shpchprm_acpi_build_php_slots_callback(
- acpi_handle handle,
- u32 Level,
- void *context,
- void **retval
- )
-{
- ulong bus_num;
- ulong seg_num;
- ulong sun, adr;
- ulong padr = 0;
- acpi_handle phandle = NULL;
- struct acpi_bridge *pab = (struct acpi_bridge *)context;
- struct acpi_bridge *lab;
- acpi_status status;
- u8 *path_name = acpi_path_name(handle);
-
- /* get _SUN */
- status = acpi_evaluate_integer(handle, METHOD_NAME__SUN, NULL, &sun);
- switch(status) {
- case AE_NOT_FOUND:
- return AE_OK;
- default:
- if (ACPI_FAILURE(status)) {
- err("acpi_shpchprm:%s _SUN fail=0x%x\n", path_name, status);
- return status;
- }
- }
-
- /* get _ADR. _ADR must exist if _SUN exists */
- status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
- if (ACPI_FAILURE(status)) {
- err("acpi_shpchprm:%s _ADR fail=0x%x\n", path_name, status);
- return status;
- }
-
- dbg("acpi_shpchprm:%s sun=0x%08x adr=0x%08x\n", path_name, (u32)sun, (u32)adr);
-
- status = acpi_get_parent(handle, &phandle);
- if (ACPI_FAILURE(status)) {
- err("acpi_shpchprm:%s get_parent fail=0x%x\n", path_name, status);
- return (status);
- }
-
- bus_num = pab->bus;
- seg_num = pab->seg;
-
- if (pab->bus == bus_num) {
- lab = pab;
+ err("%s:%s OSHP fails=0x%x\n", __FUNCTION__, path_name,
+ status);
} else {
- dbg("WARN: pab is not parent\n");
- lab = find_acpi_bridge_by_bus(pab, seg_num, bus_num);
- if (!lab) {
- dbg("acpi_shpchprm: alloc new P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun);
- lab = (struct acpi_bridge *)kmalloc(sizeof(struct acpi_bridge), GFP_KERNEL);
- if (!lab) {
- err("acpi_shpchprm: alloc for ab fail\n");
- return AE_NO_MEMORY;
- }
- memset(lab, 0, sizeof(struct acpi_bridge));
-
- lab->handle = phandle;
- lab->pbus = pab->bus;
- lab->pdevice = (int)(padr >> 16) & 0xffff;
- lab->pfunction = (int)(padr & 0xffff);
- lab->bus = (int)bus_num;
- lab->scanned = 0;
- lab->type = BRIDGE_TYPE_P2P;
-
- shpchprm_acpi_register_a_bridge (&acpi_bridges_head, pab, lab);
- } else
- dbg("acpi_shpchprm: found P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun);
+ dbg("%s:%s OSHP passes\n", __FUNCTION__, path_name);
}
-
- acpi_add_slot_to_php_slots(lab, (int)bus_num, handle, (u32)adr, (u32)sun);
- return (status);
-}
-
-static int shpchprm_acpi_build_php_slots(
- struct acpi_bridge *ab,
- u32 depth
- )
-{
- acpi_status status;
- u8 *path_name = acpi_path_name(ab->handle);
-
- /* Walk down this pci bridge to get _SUNs if any behind P2P */
- status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
- ab->handle,
- depth,
- shpchprm_acpi_build_php_slots_callback,
- ab,
- NULL );
- if (ACPI_FAILURE(status)) {
- dbg("acpi_shpchprm:%s walk for _SUN on pci bridge seg:bus(%x:%x) fail=0x%x\n", path_name, ab->seg, ab->bus, status);
- return -1;
- }
-
- return 0;
-}
-
-static void build_a_bridge(
- struct acpi_bridge *pab,
- struct acpi_bridge *ab
- )
-{
- u8 *path_name = acpi_path_name(ab->handle);
-
- shpchprm_acpi_register_a_bridge (&acpi_bridges_head, pab, ab);
-
- switch (ab->type) {
- case BRIDGE_TYPE_HOST:
- dbg("acpi_shpchprm: Registered PCI HOST Bridge(%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n",
- ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name);
- break;
- case BRIDGE_TYPE_P2P:
- dbg("acpi_shpchprm: Registered PCI P2P Bridge(%02x-%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n",
- ab->pbus, ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name);
- break;
- };
-
- /* build any immediate PHP slots under this pci bridge */
- shpchprm_acpi_build_php_slots(ab, 1);
-}
-
-static struct acpi_bridge * add_p2p_bridge(
- acpi_handle handle,
- struct acpi_bridge *pab, /* parent */
- ulong adr
- )
-{
- struct acpi_bridge *ab;
- struct pci_dev *pdev;
- ulong devnum, funcnum;
- u8 *path_name = acpi_path_name(handle);
-
- ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL);
- if (!ab) {
- err("acpi_shpchprm: alloc for ab fail\n");
- return NULL;
- }
- memset(ab, 0, sizeof(struct acpi_bridge));
-
- devnum = (adr >> 16) & 0xffff;
- funcnum = adr & 0xffff;
-
- pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum));
- if (!pdev || !pdev->subordinate) {
- err("acpi_shpchprm:%s is not a P2P Bridge\n", path_name);
- kfree(ab);
- return NULL;
- }
-
- ab->handle = handle;
- ab->seg = pab->seg;
- ab->pbus = pab->bus; /* or pdev->bus->number */
- ab->pdevice = devnum; /* or PCI_SLOT(pdev->devfn) */
- ab->pfunction = funcnum; /* or PCI_FUNC(pdev->devfn) */
- ab->bus = pdev->subordinate->number;
- ab->scanned = 0;
- ab->type = BRIDGE_TYPE_P2P;
-
- dbg("acpi_shpchprm: P2P(%x-%x) on pci=b:d:f(%x:%x:%x) acpi=b:d:f(%x:%x:%x) [%s]\n",
- pab->bus, ab->bus, pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
- pab->bus, (u32)devnum, (u32)funcnum, path_name);
-
- build_a_bridge(pab, ab);
-
- return ab;
-}
-
-static acpi_status scan_p2p_bridge(
- acpi_handle handle,
- u32 Level,
- void *context,
- void **retval
- )
-{
- struct acpi_bridge *pab = (struct acpi_bridge *)context;
- struct acpi_bridge *ab;
- acpi_status status;
- ulong adr = 0;
- u8 *path_name = acpi_path_name(handle);
- ulong devnum, funcnum;
- struct pci_dev *pdev;
-
- /* get device, function */
- status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
- if (ACPI_FAILURE(status)) {
- if (status != AE_NOT_FOUND)
- err("acpi_shpchprm:%s _ADR fail=0x%x\n", path_name, status);
- return AE_OK;
- }
-
- devnum = (adr >> 16) & 0xffff;
- funcnum = adr & 0xffff;
-
- pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum));
- if (!pdev)
- return AE_OK;
- if (!pdev->subordinate)
- return AE_OK;
-
- ab = add_p2p_bridge(handle, pab, adr);
- if (ab) {
- status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
- handle,
- (u32)1,
- scan_p2p_bridge,
- ab,
- NULL);
- if (ACPI_FAILURE(status))
- dbg("acpi_shpchprm:%s find_p2p fail=0x%x\n", path_name, status);
- }
-
- return AE_OK;
-}
-
-static struct acpi_bridge * add_host_bridge(
- acpi_handle handle,
- ulong segnum,
- ulong busnum
- )
-{
- ulong adr = 0;
- acpi_status status;
- struct acpi_bridge *ab;
- u8 *path_name = acpi_path_name(handle);
-
- /* get device, function: host br adr is always 0000 though. */
- status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
- if (ACPI_FAILURE(status)) {
- err("acpi_shpchprm:%s _ADR fail=0x%x\n", path_name, status);
- return NULL;
- }
- dbg("acpi_shpchprm: ROOT PCI seg(0x%x)bus(0x%x)dev(0x%x)func(0x%x) [%s]\n", (u32)segnum, (u32)busnum,
- (u32)(adr >> 16) & 0xffff, (u32)adr & 0xffff, path_name);
-
- ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL);
- if (!ab) {
- err("acpi_shpchprm: alloc for ab fail\n");
- return NULL;
- }
- memset(ab, 0, sizeof(struct acpi_bridge));
-
- ab->handle = handle;
- ab->seg = (int)segnum;
- ab->bus = ab->pbus = (int)busnum;
- ab->pdevice = (int)(adr >> 16) & 0xffff;
- ab->pfunction = (int)(adr & 0xffff);
- ab->scanned = 0;
- ab->type = BRIDGE_TYPE_HOST;
-
- build_a_bridge(ab, ab);
-
- return ab;
-}
-
-static acpi_status acpi_scan_from_root_pci_callback (
- acpi_handle handle,
- u32 Level,
- void *context,
- void **retval
- )
-{
- ulong segnum = 0;
- ulong busnum = 0;
- acpi_status status;
- struct acpi_bridge *ab;
- u8 *path_name = acpi_path_name(handle);
-
- /* get bus number of this pci root bridge */
- status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, &segnum);
- if (ACPI_FAILURE(status)) {
- if (status != AE_NOT_FOUND) {
- err("acpi_shpchprm:%s evaluate _SEG fail=0x%x\n", path_name, status);
- return status;
- }
- segnum = 0;
- }
-
- /* get bus number of this pci root bridge */
- status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL, &busnum);
- if (ACPI_FAILURE(status)) {
- err("acpi_shpchprm:%s evaluate _BBN fail=0x%x\n", path_name, status);
- return (status);
- }
-
- ab = add_host_bridge(handle, segnum, busnum);
- if (ab) {
- status = acpi_walk_namespace ( ACPI_TYPE_DEVICE,
- handle,
- 1,
- scan_p2p_bridge,
- ab,
- NULL);
- if (ACPI_FAILURE(status))
- dbg("acpi_shpchprm:%s find_p2p fail=0x%x\n", path_name, status);
- }
-
- return AE_OK;
-}
-
-static int shpchprm_acpi_scan_pci (void)
-{
- acpi_status status;
-
- /*
- * TBD: traverse LDM device tree with the help of
- * unified ACPI augmented for php device population.
- */
- status = acpi_get_devices ( PCI_ROOT_HID_STRING,
- acpi_scan_from_root_pci_callback,
- NULL,
- NULL );
- if (ACPI_FAILURE(status)) {
- err("acpi_shpchprm:get_device PCI ROOT HID fail=0x%x\n", status);
- return -1;
- }
-
- return 0;
-}
-
-int shpchprm_init(enum php_ctlr_type ctlr_type)
-{
- int rc;
-
- if (ctlr_type != PCI)
- return -ENODEV;
-
- dbg("shpchprm ACPI init <enter>\n");
- acpi_bridges_head = NULL;
-
- /* construct PCI bus:device tree of acpi_handles */
- rc = shpchprm_acpi_scan_pci();
- if (rc)
- return rc;
-
- dbg("shpchprm ACPI init %s\n", (rc)?"fail":"success");
- return rc;
-}
-
-static void free_a_slot(struct acpi_php_slot *aps)
-{
- dbg(" free a php func of slot(0x%02x) on PCI b:d:f=0x%02x:%02x:%02x\n", aps->sun, aps->bus, aps->dev, aps->fun);
-
- kfree(aps);
-}
-
-static void free_a_bridge( struct acpi_bridge *ab)
-{
- struct acpi_php_slot *aps, *next;
-
- switch (ab->type) {
- case BRIDGE_TYPE_HOST:
- dbg("Free ACPI PCI HOST Bridge(%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n",
- ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction);
- break;
- case BRIDGE_TYPE_P2P:
- dbg("Free ACPI PCI P2P Bridge(%x-%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n",
- ab->pbus, ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction);
- break;
- };
-
- /* free slots first */
- for (aps = ab->slots; aps; aps = next) {
- next = aps->next;
- free_a_slot(aps);
- }
-
- kfree(ab);
-}
-
-static void shpchprm_free_bridges ( struct acpi_bridge *ab)
-{
- if (!ab)
- return;
-
- if (ab->child)
- shpchprm_free_bridges (ab->child);
-
- if (ab->next)
- shpchprm_free_bridges (ab->next);
-
- free_a_bridge(ab);
-}
-
-void shpchprm_cleanup(void)
-{
- shpchprm_free_bridges (acpi_bridges_head);
-}
-
-static int get_number_of_slots (
- struct acpi_bridge *ab,
- int selfonly
- )
-{
- struct acpi_php_slot *aps;
- int prev_slot = -1;
- int slot_num = 0;
-
- for ( aps = ab->slots; aps; aps = aps->next)
- if (aps->dev != prev_slot) {
- prev_slot = aps->dev;
- slot_num++;
- }
-
- if (ab->child)
- slot_num += get_number_of_slots (ab->child, 0);
-
- if (selfonly)
- return slot_num;
-
- if (ab->next)
- slot_num += get_number_of_slots (ab->next, 0);
-
- return slot_num;
-}
-
-static struct acpi_php_slot * get_acpi_slot (
- struct acpi_bridge *ab,
- u32 sun
- )
-{
- struct acpi_php_slot *aps = NULL;
-
- for ( aps = ab->slots; aps; aps = aps->next)
- if (aps->sun == sun)
- return aps;
-
- if (!aps && ab->child) {
- aps = (struct acpi_php_slot *)get_acpi_slot (ab->child, sun);
- if (aps)
- return aps;
- }
-
- if (!aps && ab->next) {
- aps = (struct acpi_php_slot *)get_acpi_slot (ab->next, sun);
- if (aps)
- return aps;
- }
-
- return aps;
-
}
int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
@@ -755,108 +153,40 @@
return 0;
}
-int shpchprm_set_hpp(
- struct controller *ctrl,
- struct pci_func *func,
- u8 card_type
- )
+void get_hp_hw_control_from_firmware(struct pci_dev *dev)
{
- struct acpi_bridge *ab;
- struct pci_bus lpci_bus, *pci_bus;
- int rc = 0;
- unsigned int devfn;
- u8 cls= 0x08; /* default cache line size */
- u8 lt = 0x40; /* default latency timer */
- u8 ep = 0;
- u8 es = 0;
-
- memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
- pci_bus = &lpci_bus;
- pci_bus->number = func->bus;
- devfn = PCI_DEVFN(func->device, func->function);
-
- ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->slot_bus);
-
- if (ab) {
- if (ab->_hpp) {
- lt = (u8)ab->_hpp->latency_timer;
- cls = (u8)ab->_hpp->cache_line_size;
- ep = (u8)ab->_hpp->enable_perr;
- es = (u8)ab->_hpp->enable_serr;
- } else
- dbg("_hpp: no _hpp for B/D/F=%#x/%#x/%#x. use default value\n", func->bus, func->device, func->function);
- } else
- dbg("_hpp: no acpi bridge for B/D/F = %#x/%#x/%#x. use default value\n", func->bus, func->device, func->function);
-
-
- if (card_type == PCI_HEADER_TYPE_BRIDGE) {
- /* set subordinate Latency Timer */
- rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, lt);
- }
-
- /* set base Latency Timer */
- rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, lt);
- dbg(" set latency timer =0x%02x: %x\n", lt, rc);
-
- rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, cls);
- dbg(" set cache_line_size=0x%02x: %x\n", cls, rc);
-
- return rc;
+ /*
+ * OSHP is an optional ACPI firmware control method. If present,
+ * we need to run it to inform BIOS that we will control SHPC
+ * hardware from now on.
+ */
+ acpi_handle handle = DEVICE_ACPI_HANDLE(&(dev->dev));
+ if (!handle)
+ return;
+ acpi_run_oshp(handle);
}
-void shpchprm_enable_card(
- struct controller *ctrl,
- struct pci_func *func,
- u8 card_type)
+void get_hp_params_from_firmware(struct pci_dev *dev,
+ struct hotplug_params *hpp)
{
- u16 command, cmd, bcommand, bcmd;
- struct pci_bus lpci_bus, *pci_bus;
- struct acpi_bridge *ab;
- unsigned int devfn;
- int rc;
+ acpi_status status = AE_NOT_FOUND;
+ struct pci_dev *pdev = dev;
- memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
- pci_bus = &lpci_bus;
- pci_bus->number = func->bus;
- devfn = PCI_DEVFN(func->device, func->function);
-
- rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
-
- if (card_type == PCI_HEADER_TYPE_BRIDGE) {
- rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
- }
-
- cmd = command = command | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
- | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
- bcmd = bcommand = bcommand | PCI_BRIDGE_CTL_NO_ISA;
-
- ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->slot_bus);
- if (ab) {
- if (ab->_hpp) {
- if (ab->_hpp->enable_perr) {
- command |= PCI_COMMAND_PARITY;
- bcommand |= PCI_BRIDGE_CTL_PARITY;
- } else {
- command &= ~PCI_COMMAND_PARITY;
- bcommand &= ~PCI_BRIDGE_CTL_PARITY;
- }
- if (ab->_hpp->enable_serr) {
- command |= PCI_COMMAND_SERR;
- bcommand |= PCI_BRIDGE_CTL_SERR;
- } else {
- command &= ~PCI_COMMAND_SERR;
- bcommand &= ~PCI_BRIDGE_CTL_SERR;
- }
- } else
- dbg("no _hpp for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function);
- } else
- dbg("no acpi bridge for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function);
-
- if (command != cmd) {
- rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
- }
- if ((card_type == PCI_HEADER_TYPE_BRIDGE) && (bcommand != bcmd)) {
- rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
+ /*
+ * _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
+ */
+ while (pdev && (ACPI_FAILURE(status))) {
+ acpi_handle handle = DEVICE_ACPI_HANDLE(&(pdev->dev));
+ if (!handle)
+ break;
+ status = acpi_run_hpp(handle, hpp);
+ if (!(pdev->bus->parent))
+ break;
+ /* Check if a parent object supports _HPP */
+ pdev = pdev->bus->parent->self;
}
}
diff --git a/drivers/pci/hotplug/shpchprm_legacy.c b/drivers/pci/hotplug/shpchprm_legacy.c
index 6c27deb..cfc6092 100644
--- a/drivers/pci/hotplug/shpchprm_legacy.c
+++ b/drivers/pci/hotplug/shpchprm_legacy.c
@@ -37,10 +37,6 @@
#include "shpchp.h"
#include "shpchprm.h"
-void shpchprm_cleanup(void)
-{
-}
-
int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
{
int offset = devnum - ctrl->slot_device_offset;
@@ -49,97 +45,14 @@
return 0;
}
-int shpchprm_set_hpp(
- struct controller *ctrl,
- struct pci_func *func,
- u8 card_type)
+void get_hp_params_from_firmware(struct pci_dev *dev,
+ struct hotplug_params *hpp)
{
- u32 rc;
- u8 temp_byte;
- struct pci_bus lpci_bus, *pci_bus;
- unsigned int devfn;
- memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
- pci_bus = &lpci_bus;
- pci_bus->number = func->bus;
- devfn = PCI_DEVFN(func->device, func->function);
-
- temp_byte = 0x40; /* hard coded value for LT */
- if (card_type == PCI_HEADER_TYPE_BRIDGE) {
- /* set subordinate Latency Timer */
- rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
- if (rc) {
- dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus,
- func->device, func->function);
- return rc;
- }
- }
-
- /* set base Latency Timer */
- rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
- if (rc) {
- dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
- return rc;
- }
-
- /* set Cache Line size */
- temp_byte = 0x08; /* hard coded value for CLS */
- rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
- if (rc) {
- dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
- }
-
- /* set enable_perr */
- /* set enable_serr */
-
- return rc;
+ return;
}
-void shpchprm_enable_card(
- struct controller *ctrl,
- struct pci_func *func,
- u8 card_type)
+void get_hp_hw_control_from_firmware(struct pci_dev *dev)
{
- u16 command, bcommand;
- struct pci_bus lpci_bus, *pci_bus;
- unsigned int devfn;
- int rc;
-
- memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
- pci_bus = &lpci_bus;
- pci_bus->number = func->bus;
- devfn = PCI_DEVFN(func->device, func->function);
-
- rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
- command |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR
- | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
- | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
- rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
-
- if (card_type == PCI_HEADER_TYPE_BRIDGE) {
- rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
- bcommand |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR
- | PCI_BRIDGE_CTL_NO_ISA;
- rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
- }
+ return;
}
-static int legacy_shpchprm_init_pci(void)
-{
- return 0;
-}
-
-int shpchprm_init(enum php_ctlr_type ctrl_type)
-{
- int retval;
-
- switch (ctrl_type) {
- case PCI:
- retval = legacy_shpchprm_init_pci();
- break;
- default:
- retval = -ENODEV;
- break;
- }
-
- return retval;
-}
diff --git a/drivers/pci/hotplug/shpchprm_nonacpi.c b/drivers/pci/hotplug/shpchprm_nonacpi.c
index 9d4ccae..f36c188 100644
--- a/drivers/pci/hotplug/shpchprm_nonacpi.c
+++ b/drivers/pci/hotplug/shpchprm_nonacpi.c
@@ -37,11 +37,6 @@
#include "shpchp.h"
#include "shpchprm.h"
-void shpchprm_cleanup(void)
-{
- return;
-}
-
int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
{
int offset = devnum - ctrl->slot_device_offset;
@@ -51,106 +46,13 @@
return 0;
}
-int shpchprm_set_hpp(
- struct controller *ctrl,
- struct pci_func *func,
- u8 card_type)
+void get_hp_params_from_firmware(struct pci_dev *dev,
+ struct hotplug_params *hpp)
{
- u32 rc;
- u8 temp_byte;
- struct pci_bus lpci_bus, *pci_bus;
- unsigned int devfn;
- memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
- pci_bus = &lpci_bus;
- pci_bus->number = func->bus;
- devfn = PCI_DEVFN(func->device, func->function);
-
- temp_byte = 0x40; /* hard coded value for LT */
- if (card_type == PCI_HEADER_TYPE_BRIDGE) {
- /* set subordinate Latency Timer */
- rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
-
- if (rc) {
- dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus,
- func->device, func->function);
- return rc;
- }
- }
-
- /* set base Latency Timer */
- rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
-
- if (rc) {
- dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
- return rc;
- }
-
- /* set Cache Line size */
- temp_byte = 0x08; /* hard coded value for CLS */
-
- rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
-
- if (rc) {
- dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
- }
-
- /* set enable_perr */
- /* set enable_serr */
-
- return rc;
+ return;
}
-void shpchprm_enable_card(
- struct controller *ctrl,
- struct pci_func *func,
- u8 card_type)
+void get_hp_hw_control_from_firmware(struct pci_dev *dev)
{
- u16 command, bcommand;
- struct pci_bus lpci_bus, *pci_bus;
- unsigned int devfn;
- int rc;
-
- memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
- pci_bus = &lpci_bus;
- pci_bus->number = func->bus;
- devfn = PCI_DEVFN(func->device, func->function);
-
- rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
-
- command |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR
- | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
- | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
-
- rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
-
- if (card_type == PCI_HEADER_TYPE_BRIDGE) {
-
- rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
-
- bcommand |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR
- | PCI_BRIDGE_CTL_NO_ISA;
-
- rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
- }
-}
-
-static int legacy_shpchprm_init_pci(void)
-{
- return 0;
-}
-
-int shpchprm_init(enum php_ctlr_type ctrl_type)
-{
- int retval;
-
- switch (ctrl_type) {
- case PCI:
- retval = legacy_shpchprm_init_pci();
- break;
- default:
- retval = -ENODEV;
- break;
- }
-
- return retval;
+ return;
}