mirror of
https://github.com/FEX-Emu/linux.git
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Merge branch 'acpi-ipmi'
* acpi-ipmi: ACPI / IPMI: Cleanup coding styles ACPI / IPMI: Cleanup some Kconfig codes ACPI / IPMI: Cleanup some inclusion codes ACPI / IPMI: Cleanup some initialization codes ACPI / IPMI: Cleanup several acpi_ipmi_device members ACPI / IPMI: Add reference counting for ACPI IPMI transfers ACPI / IPMI: Use global IPMI operation region handler ACPI / IPMI: Fix race caused by the unprotected ACPI IPMI user ACPI / IPMI: Fix race caused by the timed out ACPI IPMI transfers ACPI / IPMI: Fix race caused by the unprotected ACPI IPMI transfers ACPI / IPMI: Fix potential response buffer overflow
This commit is contained in:
Rafael J. Wysocki
commit
c0ced86d38
@ -158,9 +158,10 @@ config ACPI_PROCESSOR
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To compile this driver as a module, choose M here:
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the module will be called processor.
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config ACPI_IPMI
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tristate "IPMI"
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depends on IPMI_SI && IPMI_HANDLER
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depends on IPMI_SI
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default n
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help
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This driver enables the ACPI to access the BMC controller. And it
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@ -1,8 +1,9 @@
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/*
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* acpi_ipmi.c - ACPI IPMI opregion
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*
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* Copyright (C) 2010 Intel Corporation
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* Copyright (C) 2010 Zhao Yakui <yakui.zhao@intel.com>
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* Copyright (C) 2010, 2013 Intel Corporation
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* Author: Zhao Yakui <yakui.zhao@intel.com>
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* Lv Zheng <lv.zheng@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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@ -23,60 +24,58 @@
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/io.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#include <linux/acpi.h>
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#include <linux/ipmi.h>
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#include <linux/device.h>
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#include <linux/pnp.h>
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#include <linux/spinlock.h>
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MODULE_AUTHOR("Zhao Yakui");
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MODULE_DESCRIPTION("ACPI IPMI Opregion driver");
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MODULE_LICENSE("GPL");
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#define IPMI_FLAGS_HANDLER_INSTALL 0
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#define ACPI_IPMI_OK 0
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#define ACPI_IPMI_TIMEOUT 0x10
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#define ACPI_IPMI_UNKNOWN 0x07
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/* the IPMI timeout is 5s */
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#define IPMI_TIMEOUT (5 * HZ)
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#define IPMI_TIMEOUT (5000)
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#define ACPI_IPMI_MAX_MSG_LENGTH 64
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struct acpi_ipmi_device {
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/* the device list attached to driver_data.ipmi_devices */
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struct list_head head;
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/* the IPMI request message list */
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struct list_head tx_msg_list;
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spinlock_t tx_msg_lock;
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spinlock_t tx_msg_lock;
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acpi_handle handle;
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struct pnp_dev *pnp_dev;
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ipmi_user_t user_interface;
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struct device *dev;
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ipmi_user_t user_interface;
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int ipmi_ifnum; /* IPMI interface number */
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long curr_msgid;
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unsigned long flags;
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struct ipmi_smi_info smi_data;
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bool dead;
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struct kref kref;
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};
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struct ipmi_driver_data {
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struct list_head ipmi_devices;
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struct ipmi_smi_watcher bmc_events;
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struct ipmi_user_hndl ipmi_hndlrs;
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struct mutex ipmi_lock;
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struct list_head ipmi_devices;
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struct ipmi_smi_watcher bmc_events;
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struct ipmi_user_hndl ipmi_hndlrs;
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struct mutex ipmi_lock;
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/*
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* NOTE: IPMI System Interface Selection
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* There is no system interface specified by the IPMI operation
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* region access. We try to select one system interface with ACPI
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* handle set. IPMI messages passed from the ACPI codes are sent
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* to this selected global IPMI system interface.
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*/
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struct acpi_ipmi_device *selected_smi;
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};
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struct acpi_ipmi_msg {
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struct list_head head;
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/*
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* General speaking the addr type should be SI_ADDR_TYPE. And
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* the addr channel should be BMC.
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@ -86,30 +85,31 @@ struct acpi_ipmi_msg {
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*/
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struct ipmi_addr addr;
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long tx_msgid;
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/* it is used to track whether the IPMI message is finished */
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struct completion tx_complete;
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struct kernel_ipmi_msg tx_message;
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int msg_done;
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/* tx data . And copy it from ACPI object buffer */
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u8 tx_data[64];
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int tx_len;
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u8 rx_data[64];
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int rx_len;
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int msg_done;
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/* tx/rx data . And copy it from/to ACPI object buffer */
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u8 data[ACPI_IPMI_MAX_MSG_LENGTH];
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u8 rx_len;
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struct acpi_ipmi_device *device;
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struct kref kref;
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};
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/* IPMI request/response buffer per ACPI 4.0, sec 5.5.2.4.3.2 */
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struct acpi_ipmi_buffer {
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u8 status;
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u8 length;
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u8 data[64];
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u8 data[ACPI_IPMI_MAX_MSG_LENGTH];
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};
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static void ipmi_register_bmc(int iface, struct device *dev);
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static void ipmi_bmc_gone(int iface);
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static void ipmi_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
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static void acpi_add_ipmi_device(struct acpi_ipmi_device *ipmi_device);
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static void acpi_remove_ipmi_device(struct acpi_ipmi_device *ipmi_device);
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static struct ipmi_driver_data driver_data = {
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.ipmi_devices = LIST_HEAD_INIT(driver_data.ipmi_devices),
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@ -121,29 +121,142 @@ static struct ipmi_driver_data driver_data = {
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.ipmi_hndlrs = {
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.ipmi_recv_hndl = ipmi_msg_handler,
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},
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.ipmi_lock = __MUTEX_INITIALIZER(driver_data.ipmi_lock)
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};
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static struct acpi_ipmi_msg *acpi_alloc_ipmi_msg(struct acpi_ipmi_device *ipmi)
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static struct acpi_ipmi_device *
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ipmi_dev_alloc(int iface, struct device *dev, acpi_handle handle)
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{
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struct acpi_ipmi_msg *ipmi_msg;
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struct pnp_dev *pnp_dev = ipmi->pnp_dev;
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struct acpi_ipmi_device *ipmi_device;
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int err;
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ipmi_user_t user;
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ipmi_msg = kzalloc(sizeof(struct acpi_ipmi_msg), GFP_KERNEL);
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if (!ipmi_msg) {
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dev_warn(&pnp_dev->dev, "Can't allocate memory for ipmi_msg\n");
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ipmi_device = kzalloc(sizeof(*ipmi_device), GFP_KERNEL);
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if (!ipmi_device)
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return NULL;
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kref_init(&ipmi_device->kref);
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INIT_LIST_HEAD(&ipmi_device->head);
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INIT_LIST_HEAD(&ipmi_device->tx_msg_list);
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spin_lock_init(&ipmi_device->tx_msg_lock);
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ipmi_device->handle = handle;
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ipmi_device->dev = get_device(dev);
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ipmi_device->ipmi_ifnum = iface;
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err = ipmi_create_user(iface, &driver_data.ipmi_hndlrs,
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ipmi_device, &user);
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if (err) {
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put_device(dev);
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kfree(ipmi_device);
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return NULL;
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}
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ipmi_device->user_interface = user;
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return ipmi_device;
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}
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static void ipmi_dev_release(struct acpi_ipmi_device *ipmi_device)
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{
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ipmi_destroy_user(ipmi_device->user_interface);
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put_device(ipmi_device->dev);
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kfree(ipmi_device);
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}
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static void ipmi_dev_release_kref(struct kref *kref)
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{
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struct acpi_ipmi_device *ipmi =
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container_of(kref, struct acpi_ipmi_device, kref);
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ipmi_dev_release(ipmi);
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}
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static void __ipmi_dev_kill(struct acpi_ipmi_device *ipmi_device)
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{
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list_del(&ipmi_device->head);
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if (driver_data.selected_smi == ipmi_device)
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driver_data.selected_smi = NULL;
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/*
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* Always setting dead flag after deleting from the list or
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* list_for_each_entry() codes must get changed.
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*/
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ipmi_device->dead = true;
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}
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static struct acpi_ipmi_device *acpi_ipmi_dev_get(void)
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{
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struct acpi_ipmi_device *ipmi_device = NULL;
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mutex_lock(&driver_data.ipmi_lock);
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if (driver_data.selected_smi) {
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ipmi_device = driver_data.selected_smi;
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kref_get(&ipmi_device->kref);
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}
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mutex_unlock(&driver_data.ipmi_lock);
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return ipmi_device;
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}
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static void acpi_ipmi_dev_put(struct acpi_ipmi_device *ipmi_device)
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{
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kref_put(&ipmi_device->kref, ipmi_dev_release_kref);
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}
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static struct acpi_ipmi_msg *ipmi_msg_alloc(void)
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{
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struct acpi_ipmi_device *ipmi;
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struct acpi_ipmi_msg *ipmi_msg;
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ipmi = acpi_ipmi_dev_get();
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if (!ipmi)
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return NULL;
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ipmi_msg = kzalloc(sizeof(struct acpi_ipmi_msg), GFP_KERNEL);
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if (!ipmi_msg) {
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acpi_ipmi_dev_put(ipmi);
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return NULL;
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}
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kref_init(&ipmi_msg->kref);
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init_completion(&ipmi_msg->tx_complete);
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INIT_LIST_HEAD(&ipmi_msg->head);
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ipmi_msg->device = ipmi;
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ipmi_msg->msg_done = ACPI_IPMI_UNKNOWN;
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return ipmi_msg;
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}
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#define IPMI_OP_RGN_NETFN(offset) ((offset >> 8) & 0xff)
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#define IPMI_OP_RGN_CMD(offset) (offset & 0xff)
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static void acpi_format_ipmi_msg(struct acpi_ipmi_msg *tx_msg,
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acpi_physical_address address,
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acpi_integer *value)
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static void ipmi_msg_release(struct acpi_ipmi_msg *tx_msg)
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{
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acpi_ipmi_dev_put(tx_msg->device);
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kfree(tx_msg);
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}
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static void ipmi_msg_release_kref(struct kref *kref)
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{
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struct acpi_ipmi_msg *tx_msg =
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container_of(kref, struct acpi_ipmi_msg, kref);
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ipmi_msg_release(tx_msg);
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}
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static struct acpi_ipmi_msg *acpi_ipmi_msg_get(struct acpi_ipmi_msg *tx_msg)
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{
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kref_get(&tx_msg->kref);
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return tx_msg;
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}
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static void acpi_ipmi_msg_put(struct acpi_ipmi_msg *tx_msg)
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{
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kref_put(&tx_msg->kref, ipmi_msg_release_kref);
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}
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#define IPMI_OP_RGN_NETFN(offset) ((offset >> 8) & 0xff)
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#define IPMI_OP_RGN_CMD(offset) (offset & 0xff)
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static int acpi_format_ipmi_request(struct acpi_ipmi_msg *tx_msg,
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acpi_physical_address address,
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acpi_integer *value)
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{
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struct kernel_ipmi_msg *msg;
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struct acpi_ipmi_buffer *buffer;
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@ -151,21 +264,31 @@ static void acpi_format_ipmi_msg(struct acpi_ipmi_msg *tx_msg,
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unsigned long flags;
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msg = &tx_msg->tx_message;
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/*
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* IPMI network function and command are encoded in the address
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* within the IPMI OpRegion; see ACPI 4.0, sec 5.5.2.4.3.
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*/
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msg->netfn = IPMI_OP_RGN_NETFN(address);
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msg->cmd = IPMI_OP_RGN_CMD(address);
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msg->data = tx_msg->tx_data;
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msg->data = tx_msg->data;
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/*
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* value is the parameter passed by the IPMI opregion space handler.
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* It points to the IPMI request message buffer
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*/
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buffer = (struct acpi_ipmi_buffer *)value;
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/* copy the tx message data */
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if (buffer->length > ACPI_IPMI_MAX_MSG_LENGTH) {
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dev_WARN_ONCE(tx_msg->device->dev, true,
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"Unexpected request (msg len %d).\n",
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buffer->length);
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return -EINVAL;
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}
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msg->data_len = buffer->length;
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memcpy(tx_msg->tx_data, buffer->data, msg->data_len);
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memcpy(tx_msg->data, buffer->data, msg->data_len);
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/*
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* now the default type is SYSTEM_INTERFACE and channel type is BMC.
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* If the netfn is APP_REQUEST and the cmd is SEND_MESSAGE,
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@ -179,14 +302,17 @@ static void acpi_format_ipmi_msg(struct acpi_ipmi_msg *tx_msg,
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/* Get the msgid */
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device = tx_msg->device;
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spin_lock_irqsave(&device->tx_msg_lock, flags);
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device->curr_msgid++;
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tx_msg->tx_msgid = device->curr_msgid;
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spin_unlock_irqrestore(&device->tx_msg_lock, flags);
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return 0;
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}
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static void acpi_format_ipmi_response(struct acpi_ipmi_msg *msg,
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acpi_integer *value, int rem_time)
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acpi_integer *value)
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{
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struct acpi_ipmi_buffer *buffer;
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@ -195,110 +321,158 @@ static void acpi_format_ipmi_response(struct acpi_ipmi_msg *msg,
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* IPMI message returned by IPMI command.
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*/
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buffer = (struct acpi_ipmi_buffer *)value;
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if (!rem_time && !msg->msg_done) {
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buffer->status = ACPI_IPMI_TIMEOUT;
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return;
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}
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/*
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* If the flag of msg_done is not set or the recv length is zero, it
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* means that the IPMI command is not executed correctly.
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* The status code will be ACPI_IPMI_UNKNOWN.
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* If the flag of msg_done is not set, it means that the IPMI command is
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* not executed correctly.
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*/
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if (!msg->msg_done || !msg->rx_len) {
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buffer->status = ACPI_IPMI_UNKNOWN;
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buffer->status = msg->msg_done;
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if (msg->msg_done != ACPI_IPMI_OK)
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return;
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}
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/*
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* If the IPMI response message is obtained correctly, the status code
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* will be ACPI_IPMI_OK
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*/
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buffer->status = ACPI_IPMI_OK;
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buffer->length = msg->rx_len;
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memcpy(buffer->data, msg->rx_data, msg->rx_len);
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memcpy(buffer->data, msg->data, msg->rx_len);
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}
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static void ipmi_flush_tx_msg(struct acpi_ipmi_device *ipmi)
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{
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struct acpi_ipmi_msg *tx_msg, *temp;
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int count = HZ / 10;
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struct pnp_dev *pnp_dev = ipmi->pnp_dev;
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struct acpi_ipmi_msg *tx_msg;
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unsigned long flags;
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/*
|
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* NOTE: On-going ipmi_recv_msg
|
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* ipmi_msg_handler() may still be invoked by ipmi_si after
|
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* flushing. But it is safe to do a fast flushing on module_exit()
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* without waiting for all ipmi_recv_msg(s) to complete from
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* ipmi_msg_handler() as it is ensured by ipmi_si that all
|
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* ipmi_recv_msg(s) are freed after invoking ipmi_destroy_user().
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*/
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spin_lock_irqsave(&ipmi->tx_msg_lock, flags);
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while (!list_empty(&ipmi->tx_msg_list)) {
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tx_msg = list_first_entry(&ipmi->tx_msg_list,
|
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struct acpi_ipmi_msg,
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head);
|
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list_del(&tx_msg->head);
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spin_unlock_irqrestore(&ipmi->tx_msg_lock, flags);
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list_for_each_entry_safe(tx_msg, temp, &ipmi->tx_msg_list, head) {
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/* wake up the sleep thread on the Tx msg */
|
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complete(&tx_msg->tx_complete);
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acpi_ipmi_msg_put(tx_msg);
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spin_lock_irqsave(&ipmi->tx_msg_lock, flags);
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}
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spin_unlock_irqrestore(&ipmi->tx_msg_lock, flags);
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}
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|
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/* wait for about 100ms to flush the tx message list */
|
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while (count--) {
|
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if (list_empty(&ipmi->tx_msg_list))
|
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static void ipmi_cancel_tx_msg(struct acpi_ipmi_device *ipmi,
|
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struct acpi_ipmi_msg *msg)
|
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{
|
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struct acpi_ipmi_msg *tx_msg, *temp;
|
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bool msg_found = false;
|
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unsigned long flags;
|
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|
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spin_lock_irqsave(&ipmi->tx_msg_lock, flags);
|
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list_for_each_entry_safe(tx_msg, temp, &ipmi->tx_msg_list, head) {
|
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if (msg == tx_msg) {
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msg_found = true;
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list_del(&tx_msg->head);
|
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break;
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schedule_timeout(1);
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}
|
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}
|
||||
if (!list_empty(&ipmi->tx_msg_list))
|
||||
dev_warn(&pnp_dev->dev, "tx msg list is not NULL\n");
|
||||
spin_unlock_irqrestore(&ipmi->tx_msg_lock, flags);
|
||||
|
||||
if (msg_found)
|
||||
acpi_ipmi_msg_put(tx_msg);
|
||||
}
|
||||
|
||||
static void ipmi_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
|
||||
{
|
||||
struct acpi_ipmi_device *ipmi_device = user_msg_data;
|
||||
int msg_found = 0;
|
||||
struct acpi_ipmi_msg *tx_msg;
|
||||
struct pnp_dev *pnp_dev = ipmi_device->pnp_dev;
|
||||
bool msg_found = false;
|
||||
struct acpi_ipmi_msg *tx_msg, *temp;
|
||||
struct device *dev = ipmi_device->dev;
|
||||
unsigned long flags;
|
||||
|
||||
if (msg->user != ipmi_device->user_interface) {
|
||||
dev_warn(&pnp_dev->dev, "Unexpected response is returned. "
|
||||
"returned user %p, expected user %p\n",
|
||||
msg->user, ipmi_device->user_interface);
|
||||
ipmi_free_recv_msg(msg);
|
||||
return;
|
||||
dev_warn(dev,
|
||||
"Unexpected response is returned. returned user %p, expected user %p\n",
|
||||
msg->user, ipmi_device->user_interface);
|
||||
goto out_msg;
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&ipmi_device->tx_msg_lock, flags);
|
||||
list_for_each_entry(tx_msg, &ipmi_device->tx_msg_list, head) {
|
||||
list_for_each_entry_safe(tx_msg, temp, &ipmi_device->tx_msg_list, head) {
|
||||
if (msg->msgid == tx_msg->tx_msgid) {
|
||||
msg_found = 1;
|
||||
msg_found = true;
|
||||
list_del(&tx_msg->head);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
spin_unlock_irqrestore(&ipmi_device->tx_msg_lock, flags);
|
||||
|
||||
if (!msg_found) {
|
||||
dev_warn(&pnp_dev->dev, "Unexpected response (msg id %ld) is "
|
||||
"returned.\n", msg->msgid);
|
||||
ipmi_free_recv_msg(msg);
|
||||
return;
|
||||
dev_warn(dev,
|
||||
"Unexpected response (msg id %ld) is returned.\n",
|
||||
msg->msgid);
|
||||
goto out_msg;
|
||||
}
|
||||
|
||||
if (msg->msg.data_len) {
|
||||
/* copy the response data to Rx_data buffer */
|
||||
memcpy(tx_msg->rx_data, msg->msg_data, msg->msg.data_len);
|
||||
tx_msg->rx_len = msg->msg.data_len;
|
||||
tx_msg->msg_done = 1;
|
||||
/* copy the response data to Rx_data buffer */
|
||||
if (msg->msg.data_len > ACPI_IPMI_MAX_MSG_LENGTH) {
|
||||
dev_WARN_ONCE(dev, true,
|
||||
"Unexpected response (msg len %d).\n",
|
||||
msg->msg.data_len);
|
||||
goto out_comp;
|
||||
}
|
||||
|
||||
/* response msg is an error msg */
|
||||
msg->recv_type = IPMI_RESPONSE_RECV_TYPE;
|
||||
if (msg->recv_type == IPMI_RESPONSE_RECV_TYPE &&
|
||||
msg->msg.data_len == 1) {
|
||||
if (msg->msg.data[0] == IPMI_TIMEOUT_COMPLETION_CODE) {
|
||||
dev_WARN_ONCE(dev, true,
|
||||
"Unexpected response (timeout).\n");
|
||||
tx_msg->msg_done = ACPI_IPMI_TIMEOUT;
|
||||
}
|
||||
goto out_comp;
|
||||
}
|
||||
|
||||
tx_msg->rx_len = msg->msg.data_len;
|
||||
memcpy(tx_msg->data, msg->msg.data, tx_msg->rx_len);
|
||||
tx_msg->msg_done = ACPI_IPMI_OK;
|
||||
|
||||
out_comp:
|
||||
complete(&tx_msg->tx_complete);
|
||||
acpi_ipmi_msg_put(tx_msg);
|
||||
out_msg:
|
||||
ipmi_free_recv_msg(msg);
|
||||
};
|
||||
}
|
||||
|
||||
static void ipmi_register_bmc(int iface, struct device *dev)
|
||||
{
|
||||
struct acpi_ipmi_device *ipmi_device, *temp;
|
||||
struct pnp_dev *pnp_dev;
|
||||
ipmi_user_t user;
|
||||
int err;
|
||||
struct ipmi_smi_info smi_data;
|
||||
acpi_handle handle;
|
||||
|
||||
err = ipmi_get_smi_info(iface, &smi_data);
|
||||
|
||||
if (err)
|
||||
return;
|
||||
|
||||
if (smi_data.addr_src != SI_ACPI) {
|
||||
put_device(smi_data.dev);
|
||||
return;
|
||||
}
|
||||
|
||||
if (smi_data.addr_src != SI_ACPI)
|
||||
goto err_ref;
|
||||
handle = smi_data.addr_info.acpi_info.acpi_handle;
|
||||
if (!handle)
|
||||
goto err_ref;
|
||||
|
||||
ipmi_device = ipmi_dev_alloc(iface, smi_data.dev, handle);
|
||||
if (!ipmi_device) {
|
||||
dev_warn(smi_data.dev, "Can't create IPMI user interface\n");
|
||||
goto err_ref;
|
||||
}
|
||||
|
||||
mutex_lock(&driver_data.ipmi_lock);
|
||||
list_for_each_entry(temp, &driver_data.ipmi_devices, head) {
|
||||
@ -307,34 +481,20 @@ static void ipmi_register_bmc(int iface, struct device *dev)
|
||||
* to the device list, don't add it again.
|
||||
*/
|
||||
if (temp->handle == handle)
|
||||
goto out;
|
||||
goto err_lock;
|
||||
}
|
||||
|
||||
ipmi_device = kzalloc(sizeof(*ipmi_device), GFP_KERNEL);
|
||||
|
||||
if (!ipmi_device)
|
||||
goto out;
|
||||
|
||||
pnp_dev = to_pnp_dev(smi_data.dev);
|
||||
ipmi_device->handle = handle;
|
||||
ipmi_device->pnp_dev = pnp_dev;
|
||||
|
||||
err = ipmi_create_user(iface, &driver_data.ipmi_hndlrs,
|
||||
ipmi_device, &user);
|
||||
if (err) {
|
||||
dev_warn(&pnp_dev->dev, "Can't create IPMI user interface\n");
|
||||
kfree(ipmi_device);
|
||||
goto out;
|
||||
}
|
||||
acpi_add_ipmi_device(ipmi_device);
|
||||
ipmi_device->user_interface = user;
|
||||
ipmi_device->ipmi_ifnum = iface;
|
||||
if (!driver_data.selected_smi)
|
||||
driver_data.selected_smi = ipmi_device;
|
||||
list_add_tail(&ipmi_device->head, &driver_data.ipmi_devices);
|
||||
mutex_unlock(&driver_data.ipmi_lock);
|
||||
memcpy(&ipmi_device->smi_data, &smi_data, sizeof(struct ipmi_smi_info));
|
||||
|
||||
put_device(smi_data.dev);
|
||||
return;
|
||||
|
||||
out:
|
||||
err_lock:
|
||||
mutex_unlock(&driver_data.ipmi_lock);
|
||||
ipmi_dev_release(ipmi_device);
|
||||
err_ref:
|
||||
put_device(smi_data.dev);
|
||||
return;
|
||||
}
|
||||
@ -342,23 +502,29 @@ out:
|
||||
static void ipmi_bmc_gone(int iface)
|
||||
{
|
||||
struct acpi_ipmi_device *ipmi_device, *temp;
|
||||
bool dev_found = false;
|
||||
|
||||
mutex_lock(&driver_data.ipmi_lock);
|
||||
list_for_each_entry_safe(ipmi_device, temp,
|
||||
&driver_data.ipmi_devices, head) {
|
||||
if (ipmi_device->ipmi_ifnum != iface)
|
||||
continue;
|
||||
|
||||
acpi_remove_ipmi_device(ipmi_device);
|
||||
put_device(ipmi_device->smi_data.dev);
|
||||
kfree(ipmi_device);
|
||||
break;
|
||||
&driver_data.ipmi_devices, head) {
|
||||
if (ipmi_device->ipmi_ifnum != iface) {
|
||||
dev_found = true;
|
||||
__ipmi_dev_kill(ipmi_device);
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (!driver_data.selected_smi)
|
||||
driver_data.selected_smi = list_first_entry_or_null(
|
||||
&driver_data.ipmi_devices,
|
||||
struct acpi_ipmi_device, head);
|
||||
mutex_unlock(&driver_data.ipmi_lock);
|
||||
|
||||
if (dev_found) {
|
||||
ipmi_flush_tx_msg(ipmi_device);
|
||||
acpi_ipmi_dev_put(ipmi_device);
|
||||
}
|
||||
}
|
||||
/* --------------------------------------------------------------------------
|
||||
* Address Space Management
|
||||
* -------------------------------------------------------------------------- */
|
||||
|
||||
/*
|
||||
* This is the IPMI opregion space handler.
|
||||
* @function: indicates the read/write. In fact as the IPMI message is driven
|
||||
@ -371,17 +537,17 @@ static void ipmi_bmc_gone(int iface)
|
||||
* the response IPMI message returned by IPMI command.
|
||||
* @handler_context: IPMI device context.
|
||||
*/
|
||||
|
||||
static acpi_status
|
||||
acpi_ipmi_space_handler(u32 function, acpi_physical_address address,
|
||||
u32 bits, acpi_integer *value,
|
||||
void *handler_context, void *region_context)
|
||||
u32 bits, acpi_integer *value,
|
||||
void *handler_context, void *region_context)
|
||||
{
|
||||
struct acpi_ipmi_msg *tx_msg;
|
||||
struct acpi_ipmi_device *ipmi_device = handler_context;
|
||||
int err, rem_time;
|
||||
struct acpi_ipmi_device *ipmi_device;
|
||||
int err;
|
||||
acpi_status status;
|
||||
unsigned long flags;
|
||||
|
||||
/*
|
||||
* IPMI opregion message.
|
||||
* IPMI message is firstly written to the BMC and system software
|
||||
@ -391,118 +557,75 @@ acpi_ipmi_space_handler(u32 function, acpi_physical_address address,
|
||||
if ((function & ACPI_IO_MASK) == ACPI_READ)
|
||||
return AE_TYPE;
|
||||
|
||||
if (!ipmi_device->user_interface)
|
||||
return AE_NOT_EXIST;
|
||||
|
||||
tx_msg = acpi_alloc_ipmi_msg(ipmi_device);
|
||||
tx_msg = ipmi_msg_alloc();
|
||||
if (!tx_msg)
|
||||
return AE_NO_MEMORY;
|
||||
return AE_NOT_EXIST;
|
||||
ipmi_device = tx_msg->device;
|
||||
|
||||
acpi_format_ipmi_msg(tx_msg, address, value);
|
||||
if (acpi_format_ipmi_request(tx_msg, address, value) != 0) {
|
||||
ipmi_msg_release(tx_msg);
|
||||
return AE_TYPE;
|
||||
}
|
||||
|
||||
acpi_ipmi_msg_get(tx_msg);
|
||||
mutex_lock(&driver_data.ipmi_lock);
|
||||
/* Do not add a tx_msg that can not be flushed. */
|
||||
if (ipmi_device->dead) {
|
||||
mutex_unlock(&driver_data.ipmi_lock);
|
||||
ipmi_msg_release(tx_msg);
|
||||
return AE_NOT_EXIST;
|
||||
}
|
||||
spin_lock_irqsave(&ipmi_device->tx_msg_lock, flags);
|
||||
list_add_tail(&tx_msg->head, &ipmi_device->tx_msg_list);
|
||||
spin_unlock_irqrestore(&ipmi_device->tx_msg_lock, flags);
|
||||
mutex_unlock(&driver_data.ipmi_lock);
|
||||
|
||||
err = ipmi_request_settime(ipmi_device->user_interface,
|
||||
&tx_msg->addr,
|
||||
tx_msg->tx_msgid,
|
||||
&tx_msg->tx_message,
|
||||
NULL, 0, 0, 0);
|
||||
&tx_msg->addr,
|
||||
tx_msg->tx_msgid,
|
||||
&tx_msg->tx_message,
|
||||
NULL, 0, 0, IPMI_TIMEOUT);
|
||||
if (err) {
|
||||
status = AE_ERROR;
|
||||
goto end_label;
|
||||
goto out_msg;
|
||||
}
|
||||
rem_time = wait_for_completion_timeout(&tx_msg->tx_complete,
|
||||
IPMI_TIMEOUT);
|
||||
acpi_format_ipmi_response(tx_msg, value, rem_time);
|
||||
wait_for_completion(&tx_msg->tx_complete);
|
||||
|
||||
acpi_format_ipmi_response(tx_msg, value);
|
||||
status = AE_OK;
|
||||
|
||||
end_label:
|
||||
spin_lock_irqsave(&ipmi_device->tx_msg_lock, flags);
|
||||
list_del(&tx_msg->head);
|
||||
spin_unlock_irqrestore(&ipmi_device->tx_msg_lock, flags);
|
||||
kfree(tx_msg);
|
||||
out_msg:
|
||||
ipmi_cancel_tx_msg(ipmi_device, tx_msg);
|
||||
acpi_ipmi_msg_put(tx_msg);
|
||||
return status;
|
||||
}
|
||||
|
||||
static void ipmi_remove_space_handler(struct acpi_ipmi_device *ipmi)
|
||||
{
|
||||
if (!test_bit(IPMI_FLAGS_HANDLER_INSTALL, &ipmi->flags))
|
||||
return;
|
||||
|
||||
acpi_remove_address_space_handler(ipmi->handle,
|
||||
ACPI_ADR_SPACE_IPMI, &acpi_ipmi_space_handler);
|
||||
|
||||
clear_bit(IPMI_FLAGS_HANDLER_INSTALL, &ipmi->flags);
|
||||
}
|
||||
|
||||
static int ipmi_install_space_handler(struct acpi_ipmi_device *ipmi)
|
||||
{
|
||||
acpi_status status;
|
||||
|
||||
if (test_bit(IPMI_FLAGS_HANDLER_INSTALL, &ipmi->flags))
|
||||
return 0;
|
||||
|
||||
status = acpi_install_address_space_handler(ipmi->handle,
|
||||
ACPI_ADR_SPACE_IPMI,
|
||||
&acpi_ipmi_space_handler,
|
||||
NULL, ipmi);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
struct pnp_dev *pnp_dev = ipmi->pnp_dev;
|
||||
dev_warn(&pnp_dev->dev, "Can't register IPMI opregion space "
|
||||
"handle\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
set_bit(IPMI_FLAGS_HANDLER_INSTALL, &ipmi->flags);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void acpi_add_ipmi_device(struct acpi_ipmi_device *ipmi_device)
|
||||
{
|
||||
|
||||
INIT_LIST_HEAD(&ipmi_device->head);
|
||||
|
||||
spin_lock_init(&ipmi_device->tx_msg_lock);
|
||||
INIT_LIST_HEAD(&ipmi_device->tx_msg_list);
|
||||
ipmi_install_space_handler(ipmi_device);
|
||||
|
||||
list_add_tail(&ipmi_device->head, &driver_data.ipmi_devices);
|
||||
}
|
||||
|
||||
static void acpi_remove_ipmi_device(struct acpi_ipmi_device *ipmi_device)
|
||||
{
|
||||
/*
|
||||
* If the IPMI user interface is created, it should be
|
||||
* destroyed.
|
||||
*/
|
||||
if (ipmi_device->user_interface) {
|
||||
ipmi_destroy_user(ipmi_device->user_interface);
|
||||
ipmi_device->user_interface = NULL;
|
||||
}
|
||||
/* flush the Tx_msg list */
|
||||
if (!list_empty(&ipmi_device->tx_msg_list))
|
||||
ipmi_flush_tx_msg(ipmi_device);
|
||||
|
||||
list_del(&ipmi_device->head);
|
||||
ipmi_remove_space_handler(ipmi_device);
|
||||
}
|
||||
|
||||
static int __init acpi_ipmi_init(void)
|
||||
{
|
||||
int result = 0;
|
||||
int result;
|
||||
acpi_status status;
|
||||
|
||||
if (acpi_disabled)
|
||||
return result;
|
||||
|
||||
mutex_init(&driver_data.ipmi_lock);
|
||||
return 0;
|
||||
|
||||
status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,
|
||||
ACPI_ADR_SPACE_IPMI,
|
||||
&acpi_ipmi_space_handler,
|
||||
NULL, NULL);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
pr_warn("Can't register IPMI opregion space handle\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
result = ipmi_smi_watcher_register(&driver_data.bmc_events);
|
||||
if (result)
|
||||
pr_err("Can't register IPMI system interface watcher\n");
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
static void __exit acpi_ipmi_exit(void)
|
||||
{
|
||||
struct acpi_ipmi_device *ipmi_device, *temp;
|
||||
struct acpi_ipmi_device *ipmi_device;
|
||||
|
||||
if (acpi_disabled)
|
||||
return;
|
||||
@ -516,13 +639,22 @@ static void __exit acpi_ipmi_exit(void)
|
||||
* handler and free it.
|
||||
*/
|
||||
mutex_lock(&driver_data.ipmi_lock);
|
||||
list_for_each_entry_safe(ipmi_device, temp,
|
||||
&driver_data.ipmi_devices, head) {
|
||||
acpi_remove_ipmi_device(ipmi_device);
|
||||
put_device(ipmi_device->smi_data.dev);
|
||||
kfree(ipmi_device);
|
||||
while (!list_empty(&driver_data.ipmi_devices)) {
|
||||
ipmi_device = list_first_entry(&driver_data.ipmi_devices,
|
||||
struct acpi_ipmi_device,
|
||||
head);
|
||||
__ipmi_dev_kill(ipmi_device);
|
||||
mutex_unlock(&driver_data.ipmi_lock);
|
||||
|
||||
ipmi_flush_tx_msg(ipmi_device);
|
||||
acpi_ipmi_dev_put(ipmi_device);
|
||||
|
||||
mutex_lock(&driver_data.ipmi_lock);
|
||||
}
|
||||
mutex_unlock(&driver_data.ipmi_lock);
|
||||
acpi_remove_address_space_handler(ACPI_ROOT_OBJECT,
|
||||
ACPI_ADR_SPACE_IPMI,
|
||||
&acpi_ipmi_space_handler);
|
||||
}
|
||||
|
||||
module_init(acpi_ipmi_init);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user