pci_hotplug-objs += cpci_hotplug_core.o \
cpci_hotplug_pci.o
endif
+ifdef CONFIG_ACPI
+pci_hotplug-objs += acpi_pcihp.o
+endif
cpqphp-objs := cpqphp_core.o \
cpqphp_ctrl.o \
pciehp_ctrl.o \
pciehp_pci.o \
pciehp_hpc.o
-ifdef CONFIG_ACPI
- pciehp-objs += pciehprm_acpi.o
-else
- pciehp-objs += pciehprm_nonacpi.o
-endif
shpchp-objs := shpchp_core.o \
shpchp_ctrl.o \
shpchp_pci.o \
shpchp_sysfs.o \
shpchp_hpc.o
-ifdef CONFIG_ACPI
- shpchp-objs += shpchprm_acpi.o
-else
- ifdef CONFIG_HOTPLUG_PCI_SHPC_PHPRM_LEGACY
- shpchp-objs += shpchprm_legacy.o
- else
- shpchp-objs += shpchprm_nonacpi.o
- endif
-endif
--- /dev/null
+/*
+ * Common ACPI functions for hot plug platforms
+ *
+ * Copyright (C) 2006 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 <kristen.c.accardi@intel.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <acpi/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/actypes.h>
+#include "pci_hotplug.h"
+
+#define METHOD_NAME__SUN "_SUN"
+#define METHOD_NAME__HPP "_HPP"
+#define METHOD_NAME_OSHP "OSHP"
+
+/* acpi_path_name
+ *
+ * @handle - the acpi_handle of the object who's name you want.
+ *
+ * Caller must free buffer.
+ */
+u8 * acpi_path_name(acpi_handle handle)
+{
+ acpi_status status;
+ struct acpi_buffer ret_buf = {ACPI_ALLOCATE_BUFFER, NULL};
+ union acpi_object *obj;
+
+ status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &ret_buf);
+ if (ACPI_FAILURE(status)) {
+ return NULL;
+ }
+ obj = ret_buf.pointer;
+ return obj->string.pointer;
+}
+EXPORT_SYMBOL_GPL(acpi_path_name);
+
+
+
+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(handle);
+ int i, len = 0;
+
+ /* get _hpp */
+ 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) {
+ printk(KERN_ERR "%s:%s alloc for _HPP fail\n",
+ __FUNCTION__, path_name);
+ acpi_os_free(path_name);
+ return AE_NO_MEMORY;
+ }
+ status = acpi_evaluate_object(handle, METHOD_NAME__HPP,
+ NULL, &ret_buf);
+ if (ACPI_SUCCESS(status))
+ break;
+ default:
+ if (ACPI_FAILURE(status)) {
+ pr_debug("%s:%s _HPP fail=0x%x\n", __FUNCTION__,
+ path_name, status);
+ acpi_os_free(path_name);
+ return status;
+ }
+ }
+
+ ext_obj = (union acpi_object *) ret_buf.pointer;
+ if (ext_obj->type != ACPI_TYPE_PACKAGE) {
+ printk(KERN_ERR "%s:%s _HPP obj not a package\n", __FUNCTION__,
+ path_name);
+ status = AE_ERROR;
+ goto free_and_return;
+ }
+
+ len = ext_obj->package.count;
+ package = (union acpi_object *) ret_buf.pointer;
+ for ( i = 0; (i < len) || (i < 4); i++) {
+ ext_obj = (union acpi_object *) &package->package.elements[i];
+ switch (ext_obj->type) {
+ case ACPI_TYPE_INTEGER:
+ nui[i] = (u8)ext_obj->integer.value;
+ break;
+ default:
+ printk(KERN_ERR "%s:%s _HPP obj type incorrect\n",
+ __FUNCTION__, path_name);
+ status = AE_ERROR;
+ goto free_and_return;
+ }
+ }
+
+ hpp->cache_line_size = nui[0];
+ hpp->latency_timer = nui[1];
+ hpp->enable_serr = nui[2];
+ hpp->enable_perr = nui[3];
+
+ pr_debug(" _HPP: cache_line_size=0x%x\n", hpp->cache_line_size);
+ pr_debug(" _HPP: latency timer =0x%x\n", hpp->latency_timer);
+ pr_debug(" _HPP: enable SERR =0x%x\n", hpp->enable_serr);
+ pr_debug(" _HPP: enable PERR =0x%x\n", hpp->enable_perr);
+
+free_and_return:
+ acpi_os_free(path_name);
+ kfree(ret_buf.pointer);
+ return status;
+}
+
+
+
+/* acpi_run_oshp - get control of hotplug from the firmware
+ *
+ * @handle - the handle of the hotplug controller.
+ */
+acpi_status acpi_run_oshp(acpi_handle handle)
+{
+ acpi_status status;
+ u8 *path_name = acpi_path_name(handle);
+
+ /* run OSHP */
+ status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL);
+ if (ACPI_FAILURE(status))
+ printk(KERN_ERR "%s:%s OSHP fails=0x%x\n", __FUNCTION__,
+ path_name, status);
+ else
+ pr_debug("%s:%s OSHP passes\n", __FUNCTION__, path_name);
+ acpi_os_free(path_name);
+ return status;
+}
+EXPORT_SYMBOL_GPL(acpi_run_oshp);
+
+
+
+/* acpi_get_hp_params_from_firmware
+ *
+ * @dev - the pci_dev of the newly added device
+ * @hpp - allocated by the caller
+ */
+acpi_status acpi_get_hp_params_from_firmware(struct pci_dev *dev,
+ struct hotplug_params *hpp)
+{
+ acpi_status status = AE_NOT_FOUND;
+ struct pci_dev *pdev = 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
+ */
+ 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;
+ }
+ return status;
+}
+EXPORT_SYMBOL_GPL(acpi_get_hp_params_from_firmware);
+
+
+/* acpi_root_bridge - check to see if this acpi object is a root bridge
+ *
+ * @handle - the acpi object in question.
+ */
+int acpi_root_bridge(acpi_handle handle)
+{
+ acpi_status status;
+ struct acpi_device_info *info;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ int i;
+
+ status = acpi_get_object_info(handle, &buffer);
+ if (ACPI_SUCCESS(status)) {
+ info = buffer.pointer;
+ if ((info->valid & ACPI_VALID_HID) &&
+ !strcmp(PCI_ROOT_HID_STRING,
+ info->hardware_id.value)) {
+ acpi_os_free(buffer.pointer);
+ return 1;
+ }
+ if (info->valid & ACPI_VALID_CID) {
+ for (i=0; i < info->compatibility_id.count; i++) {
+ if (!strcmp(PCI_ROOT_HID_STRING,
+ info->compatibility_id.id[i].value)) {
+ acpi_os_free(buffer.pointer);
+ return 1;
+ }
+ }
+ }
+ acpi_os_free(buffer.pointer);
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_root_bridge);
struct acpiphp_slot *acpi_slot;
};
-/**
- * struct hpp_param - ACPI 2.0 _HPP Hot Plug Parameters
- * @cache_line_size in DWORD
- * @latency_timer in PCI clock
- * @enable_SERR 0 or 1
- * @enable_PERR 0 or 1
- */
-struct hpp_param {
- u8 cache_line_size;
- u8 latency_timer;
- u8 enable_SERR;
- u8 enable_PERR;
-};
/**
struct pci_dev *pci_dev;
/* ACPI 2.0 _HPP parameters */
- struct hpp_param hpp;
+ struct hotplug_params hpp;
spinlock_t res_lock;
};
static void decode_hpp(struct acpiphp_bridge *bridge)
{
acpi_status status;
- struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER,
- .pointer = NULL};
- union acpi_object *package;
- int i;
-
- /* default numbers */
- bridge->hpp.cache_line_size = 0x10;
- bridge->hpp.latency_timer = 0x40;
- bridge->hpp.enable_SERR = 0;
- bridge->hpp.enable_PERR = 0;
-
- status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer);
+ status = acpi_get_hp_params_from_firmware(bridge->pci_dev, &bridge->hpp);
if (ACPI_FAILURE(status)) {
- dbg("_HPP evaluation failed\n");
- return;
- }
-
- package = (union acpi_object *) buffer.pointer;
-
- if (!package || package->type != ACPI_TYPE_PACKAGE ||
- package->package.count != 4 || !package->package.elements) {
- err("invalid _HPP object; ignoring\n");
- goto err_exit;
+ /* use default numbers */
+ bridge->hpp.cache_line_size = 0x10;
+ bridge->hpp.latency_timer = 0x40;
+ bridge->hpp.enable_serr = 0;
+ bridge->hpp.enable_perr = 0;
}
-
- for (i = 0; i < 4; i++) {
- if (package->package.elements[i].type != ACPI_TYPE_INTEGER) {
- err("invalid _HPP parameter type; ignoring\n");
- goto err_exit;
- }
- }
-
- bridge->hpp.cache_line_size = package->package.elements[0].integer.value;
- bridge->hpp.latency_timer = package->package.elements[1].integer.value;
- bridge->hpp.enable_SERR = package->package.elements[2].integer.value;
- bridge->hpp.enable_PERR = package->package.elements[3].integer.value;
-
- dbg("_HPP parameter = (%02x, %02x, %02x, %02x)\n",
- bridge->hpp.cache_line_size,
- bridge->hpp.latency_timer,
- bridge->hpp.enable_SERR,
- bridge->hpp.enable_PERR);
-
- bridge->flags |= BRIDGE_HAS_HPP;
-
- err_exit:
- kfree(buffer.pointer);
}
+
/* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */
static void init_bridge_misc(struct acpiphp_bridge *bridge)
{
pci_write_config_byte(dev, PCI_LATENCY_TIMER,
bridge->hpp.latency_timer);
pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
- if (bridge->hpp.enable_SERR)
+ if (bridge->hpp.enable_serr)
pci_cmd |= PCI_COMMAND_SERR;
else
pci_cmd &= ~PCI_COMMAND_SERR;
- if (bridge->hpp.enable_PERR)
+ if (bridge->hpp.enable_perr)
pci_cmd |= PCI_COMMAND_PARITY;
else
pci_cmd &= ~PCI_COMMAND_PARITY;
pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER,
bridge->hpp.latency_timer);
pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
- if (bridge->hpp.enable_SERR)
+ if (bridge->hpp.enable_serr)
pci_bctl |= PCI_BRIDGE_CTL_SERR;
else
pci_bctl &= ~PCI_BRIDGE_CTL_SERR;
- if (bridge->hpp.enable_PERR)
+ if (bridge->hpp.enable_perr)
pci_bctl |= PCI_BRIDGE_CTL_PARITY;
else
pci_bctl &= ~PCI_BRIDGE_CTL_PARITY;
memset(&bridge, 0, sizeof(bridge));
bridge.handle = handle;
+ bridge.pci_dev = bus->self;
decode_hpp(&bridge);
list_for_each_entry(dev, &bus->devices, bus_list)
program_hpp(dev, &bridge);
}
}
-static int is_root_bridge(acpi_handle handle)
-{
- acpi_status status;
- struct acpi_device_info *info;
- struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
- int i;
-
- status = acpi_get_object_info(handle, &buffer);
- if (ACPI_SUCCESS(status)) {
- info = buffer.pointer;
- if ((info->valid & ACPI_VALID_HID) &&
- !strcmp(PCI_ROOT_HID_STRING,
- info->hardware_id.value)) {
- acpi_os_free(buffer.pointer);
- return 1;
- }
- if (info->valid & ACPI_VALID_CID) {
- for (i=0; i < info->compatibility_id.count; i++) {
- if (!strcmp(PCI_ROOT_HID_STRING,
- info->compatibility_id.id[i].value)) {
- acpi_os_free(buffer.pointer);
- return 1;
- }
- }
- }
- }
- return 0;
-}
static acpi_status
find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
{
int *count = (int *)context;
- if (is_root_bridge(handle)) {
+ if (acpi_root_bridge(handle)) {
acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_bridge, NULL);
(*count)++;
struct hotplug_slot_info *info);
extern struct subsystem pci_hotplug_slots_subsys;
+struct hotplug_params {
+ u8 cache_line_size;
+ u8 latency_timer;
+ u8 enable_serr;
+ u8 enable_perr;
+};
+
+#ifdef CONFIG_ACPI
+#include <acpi/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/actypes.h>
+extern acpi_status acpi_run_oshp(acpi_handle handle);
+extern acpi_status acpi_get_hp_params_from_firmware(struct pci_dev *dev,
+ struct hotplug_params *hpp);
+extern u8 * acpi_path_name(acpi_handle handle);
+int acpi_root_bridge(acpi_handle handle);
+#endif
#endif
#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
-struct hotplug_params {
- u8 cache_line_size;
- u8 latency_timer;
- u8 enable_serr;
- u8 enable_perr;
-};
struct slot {
struct slot *next;
/* pci functions */
extern int pciehp_configure_device (struct slot *p_slot);
extern int pciehp_unconfigure_device (struct slot *p_slot);
-extern int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev);
-extern void pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
- struct hotplug_params *hpp);
int (*check_lnk_status) (struct controller *ctrl);
};
+
+#ifdef CONFIG_ACPI
+#define pciehp_get_hp_hw_control_from_firmware(dev) \
+ pciehp_acpi_get_hp_hw_control_from_firmware(dev)
+static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
+ struct hotplug_params *hpp)
+{
+ if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev, hpp)))
+ return -ENODEV;
+ return 0;
+}
+#else
+#define pciehp_get_hp_hw_control_from_firmware(dev) 0
+#define pciehp_get_hp_params_from_firmware(dev, hpp) (-ENODEV)
+#endif /* CONFIG_ACPI */
#endif /* _PCIEHP_H */
#include "../pci.h"
#include "pciehp.h"
-
+#include <acpi/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/actypes.h>
+#include <linux/pci-acpi.h>
#ifdef DEBUG
#define DBG_K_TRACE_ENTRY ((unsigned int)0x00000001) /* On function entry */
#define DBG_K_TRACE_EXIT ((unsigned int)0x00000002) /* On function exit */
.check_lnk_status = hpc_check_lnk_status,
};
+#ifdef CONFIG_ACPI
+int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
+{
+ acpi_status status;
+ acpi_handle chandle, handle = DEVICE_ACPI_HANDLE(&(dev->dev));
+ struct pci_dev *pdev = dev;
+ struct pci_bus *parent;
+ u8 *path_name = NULL;
+
+ /*
+ * Per PCI firmware specification, we should run the ACPI _OSC
+ * method to get control of hotplug hardware before using it.
+ * If an _OSC is missing, we look for an OSHP to do the same thing.
+ * To handle different BIOS behavior, we look for _OSC and OSHP
+ * within the scope of the hotplug controller and its parents, upto
+ * the host bridge under which this controller exists.
+ */
+ while (!handle) {
+ /*
+ * This hotplug controller was not listed in the ACPI name
+ * space at all. Try to get acpi handle of parent pci bus.
+ */
+ if (!pdev || !pdev->bus->parent)
+ break;
+ parent = pdev->bus->parent;
+ dbg("Could not find %s in acpi namespace, trying parent\n",
+ pci_name(pdev));
+ if (!parent->self)
+ /* Parent must be a host bridge */
+ handle = acpi_get_pci_rootbridge_handle(
+ pci_domain_nr(parent),
+ parent->number);
+ else
+ handle = DEVICE_ACPI_HANDLE(
+ &(parent->self->dev));
+ pdev = parent->self;
+ }
+
+ while (handle) {
+ path_name = acpi_path_name(handle);
+ dbg("Trying to get hotplug control for %s \n", path_name);
+ status = pci_osc_control_set(handle,
+ OSC_PCI_EXPRESS_NATIVE_HP_CONTROL);
+ if (status == AE_NOT_FOUND)
+ status = acpi_run_oshp(handle);
+ if (ACPI_SUCCESS(status)) {
+ dbg("Gained control for hotplug HW for pci %s (%s)\n",
+ pci_name(dev), path_name);
+ acpi_os_free(path_name);
+ return 0;
+ }
+ if (acpi_root_bridge(handle))
+ break;
+ chandle = handle;
+ status = acpi_get_parent(chandle, &handle);
+ if (ACPI_FAILURE(status))
+ break;
+ }
+
+ err("Cannot get control of hotplug hardware for pci %s\n",
+ pci_name(dev));
+ if (path_name)
+ acpi_os_free(path_name);
+ return -1;
+}
+#endif
+
+
+
int pcie_init(struct controller * ctrl, struct pcie_device *dev)
{
struct php_ctlr_state_s *php_ctlr, *p;
+++ /dev/null
-/*
- * PCIEHPRM ACPI: PHP Resource Manager for ACPI platform
- *
- * 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 <kristen.c.accardi@intel.com>
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/acpi.h>
-#include <linux/pci-acpi.h>
-#include <acpi/acpi_bus.h>
-#include <acpi/actypes.h>
-#include "pciehp.h"
-
-#define METHOD_NAME__SUN "_SUN"
-#define METHOD_NAME__HPP "_HPP"
-#define METHOD_NAME_OSHP "OSHP"
-
-static u8 * acpi_path_name( acpi_handle handle)
-{
- acpi_status status;
- static u8 path_name[ACPI_PATHNAME_MAX];
- struct acpi_buffer ret_buf = { ACPI_PATHNAME_MAX, path_name };
-
- memset(path_name, 0, sizeof (path_name));
- status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &ret_buf);
-
- if (ACPI_FAILURE(status))
- return NULL;
- else
- return path_name;
-}
-
-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(handle);
- int i, len = 0;
-
- /* get _hpp */
- 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 ("%s:%s alloc for _HPP fail\n", __FUNCTION__,
- path_name);
- return AE_NO_MEMORY;
- }
- status = acpi_evaluate_object(handle, METHOD_NAME__HPP,
- NULL, &ret_buf);
- if (ACPI_SUCCESS(status))
- break;
- default:
- if (ACPI_FAILURE(status)) {
- 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 ("%s:%s _HPP obj not a package\n", __FUNCTION__,
- path_name);
- status = AE_ERROR;
- goto free_and_return;
- }
-
- len = ext_obj->package.count;
- package = (union acpi_object *) ret_buf.pointer;
- for ( i = 0; (i < len) || (i < 4); i++) {
- ext_obj = (union acpi_object *) &package->package.elements[i];
- switch (ext_obj->type) {
- case ACPI_TYPE_INTEGER:
- nui[i] = (u8)ext_obj->integer.value;
- break;
- default:
- err ("%s:%s _HPP obj type incorrect\n", __FUNCTION__,
- path_name);
- status = AE_ERROR;
- goto free_and_return;
- }
- }
-
- hpp->cache_line_size = nui[0];
- hpp->latency_timer = nui[1];
- hpp->enable_serr = nui[2];
- hpp->enable_perr = nui[3];
-
- 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 acpi_status acpi_run_oshp(acpi_handle handle)
-{
- acpi_status status;
- u8 *path_name = acpi_path_name(handle);
-
- /* run OSHP */
- status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL);
- if (ACPI_FAILURE(status)) {
- dbg("%s:%s OSHP fails=0x%x\n", __FUNCTION__, path_name,
- status);
- } else {
- dbg("%s:%s OSHP passes\n", __FUNCTION__, path_name);
- }
- return status;
-}
-
-static int is_root_bridge(acpi_handle handle)
-{
- acpi_status status;
- struct acpi_device_info *info;
- struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
- int i;
-
- status = acpi_get_object_info(handle, &buffer);
- if (ACPI_SUCCESS(status)) {
- info = buffer.pointer;
- if ((info->valid & ACPI_VALID_HID) &&
- !strcmp(PCI_ROOT_HID_STRING,
- info->hardware_id.value)) {
- acpi_os_free(buffer.pointer);
- return 1;
- }
- if (info->valid & ACPI_VALID_CID) {
- for (i=0; i < info->compatibility_id.count; i++) {
- if (!strcmp(PCI_ROOT_HID_STRING,
- info->compatibility_id.id[i].value)) {
- acpi_os_free(buffer.pointer);
- return 1;
- }
- }
- }
- }
- return 0;
-}
-
-int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev)
-{
- acpi_status status;
- acpi_handle chandle, handle = DEVICE_ACPI_HANDLE(&(dev->dev));
- struct pci_dev *pdev = dev;
- struct pci_bus *parent;
- u8 *path_name;
-
- /*
- * Per PCI firmware specification, we should run the ACPI _OSC
- * method to get control of hotplug hardware before using it.
- * If an _OSC is missing, we look for an OSHP to do the same thing.
- * To handle different BIOS behavior, we look for _OSC and OSHP
- * within the scope of the hotplug controller and its parents, upto
- * the host bridge under which this controller exists.
- */
- while (!handle) {
- /*
- * This hotplug controller was not listed in the ACPI name
- * space at all. Try to get acpi handle of parent pci bus.
- */
- if (!pdev || !pdev->bus->parent)
- break;
- parent = pdev->bus->parent;
- dbg("Could not find %s in acpi namespace, trying parent\n",
- pci_name(pdev));
- if (!parent->self)
- /* Parent must be a host bridge */
- handle = acpi_get_pci_rootbridge_handle(
- pci_domain_nr(parent),
- parent->number);
- else
- handle = DEVICE_ACPI_HANDLE(
- &(parent->self->dev));
- pdev = parent->self;
- }
-
- while (handle) {
- path_name = acpi_path_name(handle);
- dbg("Trying to get hotplug control for %s \n", path_name);
- status = pci_osc_control_set(handle,
- OSC_PCI_EXPRESS_NATIVE_HP_CONTROL);
- if (status == AE_NOT_FOUND)
- status = acpi_run_oshp(handle);
- if (ACPI_SUCCESS(status)) {
- dbg("Gained control for hotplug HW for pci %s (%s)\n",
- pci_name(dev), path_name);
- return 0;
- }
- if (is_root_bridge(handle))
- break;
- chandle = handle;
- status = acpi_get_parent(chandle, &handle);
- if (ACPI_FAILURE(status))
- break;
- }
-
- err("Cannot get control of hotplug hardware for pci %s\n",
- pci_name(dev));
- return -1;
-}
-
-void pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
- struct hotplug_params *hpp)
-{
- acpi_status status = AE_NOT_FOUND;
- struct pci_dev *pdev = 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
- */
- 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;
- }
-}
-
+++ /dev/null
-/*
- * PCIEHPRM NONACPI: PHP Resource Manager for Non-ACPI/Legacy 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>
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-#include "pciehp.h"
-
-void pciehp_get_hp_params_from_firmware(struct pci_dev *dev,
- struct hotplug_params *hpp)
-{
- return;
-}
-
-int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev)
-{
- return 0;
-}
volatile int cmd_busy;
};
-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
extern int shpchp_save_config(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
extern int shpchp_configure_device(struct slot *p_slot);
extern int shpchp_unconfigure_device(struct slot *p_slot);
-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);
extern void shpchp_remove_ctrl_files(struct controller *ctrl);
extern void cleanup_slots(struct controller *ctrl);
extern void queue_pushbutton_work(void *data);
+
+#ifdef CONFIG_ACPI
+static inline int get_hp_params_from_firmware(struct pci_dev *dev,
+ struct hotplug_params *hpp)
+{
+ if (ACPI_FAILURE(acpi_get_hp_params_from_firmware(dev, hpp)))
+ return -ENODEV;
+ return 0;
+}
+#define get_hp_hw_control_from_firmware(pdev) \
+ do { \
+ if (DEVICE_ACPI_HANDLE(&(pdev->dev))) \
+ acpi_run_oshp(DEVICE_ACPI_HANDLE(&(pdev->dev))); \
+ } while (0)
+#else
+#define get_hp_params_from_firmware(dev, hpp) (-ENODEV)
+#define get_hp_hw_control_from_firmware(dev) do { } while (0)
+#endif
+
struct ctrl_reg {
volatile u32 base_offset;
volatile u32 slot_avail1;
slot->bus, slot->number);
}
+
+
+
+static int
+shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun,
+ u8 busnum, u8 devnum)
+{
+ int offset = devnum - ctrl->slot_device_offset;
+
+ dbg("%s: ctrl->slot_num_inc %d, offset %d\n", __FUNCTION__,
+ ctrl->slot_num_inc, offset);
+ *sun = (u8) (ctrl->first_slot + ctrl->slot_num_inc *offset);
+ return 0;
+}
+
+
+
static int init_slots(struct controller *ctrl)
{
struct slot *slot;
{
u16 pci_cmd, pci_bctl;
struct pci_dev *cdev;
- struct hotplug_params hpp = {0x8, 0x40, 0, 0}; /* defaults */
+ struct hotplug_params hpp;
/* Program hpp values for this device */
if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL ||
(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
return;
- get_hp_params_from_firmware(dev, &hpp);
+ /* use default values if we can't get them from firmware */
+ if (get_hp_params_from_firmware(dev, &hpp)) {
+ hpp.cache_line_size = 8;
+ hpp.latency_timer = 0x40;
+ hpp.enable_serr = 0;
+ hpp.enable_perr = 0;
+ }
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, hpp.cache_line_size);
pci_write_config_byte(dev, PCI_LATENCY_TIMER, hpp.latency_timer);
+++ /dev/null
-/*
- * SHPCHPRM ACPI: PHP Resource Manager for ACPI platform
- *
- * 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 <kristen.c.accardi@intel.com>
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <acpi/acpi.h>
-#include <acpi/acpi_bus.h>
-#include <acpi/actypes.h>
-#include "shpchp.h"
-
-#define METHOD_NAME__SUN "_SUN"
-#define METHOD_NAME__HPP "_HPP"
-#define METHOD_NAME_OSHP "OSHP"
-
-static u8 * acpi_path_name( acpi_handle handle)
-{
- acpi_status status;
- static u8 path_name[ACPI_PATHNAME_MAX];
- struct acpi_buffer ret_buf = { ACPI_PATHNAME_MAX, path_name };
-
- memset(path_name, 0, sizeof (path_name));
- status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &ret_buf);
-
- if (ACPI_FAILURE(status))
- return NULL;
- else
- return path_name;
-}
-
-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(handle);
- int i, len = 0;
-
- /* get _hpp */
- 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 ("%s:%s alloc for _HPP fail\n", __FUNCTION__,
- path_name);
- return AE_NO_MEMORY;
- }
- status = acpi_evaluate_object(handle, METHOD_NAME__HPP,
- NULL, &ret_buf);
- if (ACPI_SUCCESS(status))
- break;
- default:
- if (ACPI_FAILURE(status)) {
- 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 ("%s:%s _HPP obj not a package\n", __FUNCTION__,
- path_name);
- status = AE_ERROR;
- goto free_and_return;
- }
-
- len = ext_obj->package.count;
- package = (union acpi_object *) ret_buf.pointer;
- for ( i = 0; (i < len) || (i < 4); i++) {
- ext_obj = (union acpi_object *) &package->package.elements[i];
- switch (ext_obj->type) {
- case ACPI_TYPE_INTEGER:
- nui[i] = (u8)ext_obj->integer.value;
- break;
- default:
- err ("%s:%s _HPP obj type incorrect\n", __FUNCTION__,
- path_name);
- status = AE_ERROR;
- goto free_and_return;
- }
- }
-
- hpp->cache_line_size = nui[0];
- hpp->latency_timer = nui[1];
- hpp->enable_serr = nui[2];
- hpp->enable_perr = nui[3];
-
- 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(acpi_handle handle)
-{
- acpi_status status;
- u8 *path_name = acpi_path_name(handle);
-
- /* run OSHP */
- status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL);
- if (ACPI_FAILURE(status)) {
- err("%s:%s OSHP fails=0x%x\n", __FUNCTION__, path_name,
- status);
- } else {
- dbg("%s:%s OSHP passes\n", __FUNCTION__, path_name);
- }
-}
-
-int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
-{
- int offset = devnum - ctrl->slot_device_offset;
-
- dbg("%s: ctrl->slot_num_inc %d, offset %d\n", __FUNCTION__, ctrl->slot_num_inc, offset);
- *sun = (u8) (ctrl->first_slot + ctrl->slot_num_inc *offset);
- return 0;
-}
-
-void get_hp_hw_control_from_firmware(struct pci_dev *dev)
-{
- /*
- * 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 get_hp_params_from_firmware(struct pci_dev *dev,
- struct hotplug_params *hpp)
-{
- acpi_status status = AE_NOT_FOUND;
- struct pci_dev *pdev = 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
- */
- 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;
- }
-}
-
+++ /dev/null
-/*
- * SHPCHPRM Legacy: PHP Resource Manager for Non-ACPI/Legacy 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>
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include "shpchp.h"
-
-int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
-{
- int offset = devnum - ctrl->slot_device_offset;
-
- *sun = (u8) (ctrl->first_slot + ctrl->slot_num_inc * offset);
- return 0;
-}
-
-void get_hp_params_from_firmware(struct pci_dev *dev,
- struct hotplug_params *hpp)
-{
- return;
-}
-
-void get_hp_hw_control_from_firmware(struct pci_dev *dev)
-{
- return;
-}
-
+++ /dev/null
-/*
- * SHPCHPRM NONACPI: PHP Resource Manager for Non-ACPI/Legacy 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>
- *
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-
-#include "shpchp.h"
-
-int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
-{
- int offset = devnum - ctrl->slot_device_offset;
-
- dbg("%s: ctrl->slot_num_inc %d, offset %d\n", __FUNCTION__, ctrl->slot_num_inc, offset);
- *sun = (u8) (ctrl->first_slot + ctrl->slot_num_inc * offset);
- return 0;
-}
-
-void get_hp_params_from_firmware(struct pci_dev *dev,
- struct hotplug_params *hpp)
-{
- return;
-}
-
-void get_hp_hw_control_from_firmware(struct pci_dev *dev)
-{
- return;
-}
projects / powerpc.git / commitdiff