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|
/*
* Part of Intel(R) Manageability Engine Interface Linux driver
*
* Copyright (c) 2003 - 2008 Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/reboot.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/kdev_t.h>
#include <linux/moduleparam.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include "heci_data_structures.h"
#include "heci_interface.h"
#include "heci.h"
const __u8 heci_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
const __u8 heci_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
const __u8 heci_wd_state_independence_msg[3][4] = {
{0x05, 0x02, 0x51, 0x10},
{0x05, 0x02, 0x52, 0x10},
{0x07, 0x02, 0x01, 0x10}
};
static const struct guid heci_asf_guid = {
0x75B30CD6, 0xA29E, 0x4AF7,
{0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
};
const struct guid heci_wd_guid = {
0x05B79A6F, 0x4628, 0x4D7F,
{0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
};
const struct guid heci_pthi_guid = {
0x12f80028, 0xb4b7, 0x4b2d,
{0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
};
/*
* heci init function prototypes
*/
static void heci_check_asf_mode(struct iamt_heci_device *dev);
static int host_start_message(struct iamt_heci_device *dev);
static int host_enum_clients_message(struct iamt_heci_device *dev);
static int allocate_me_clients_storage(struct iamt_heci_device *dev);
static void host_init_wd(struct iamt_heci_device *dev);
static void host_init_iamthif(struct iamt_heci_device *dev);
static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
long timeout);
/**
* heci_initialize_list - Sets up a queue list.
*
* @list: An instance of our list structure
* @dev: Device object for our driver
*/
void heci_initialize_list(struct io_heci_list *list,
struct iamt_heci_device *dev)
{
/* initialize our queue list */
INIT_LIST_HEAD(&list->heci_cb.cb_list);
list->status = 0;
list->device_extension = dev;
}
/**
* heci_flush_queues - flush our queues list belong to file_ext.
*
* @dev: Device object for our driver
* @file_ext: private data of the file object
*/
void heci_flush_queues(struct iamt_heci_device *dev,
struct heci_file_private *file_ext)
{
int i;
if (!dev || !file_ext)
return;
/* flush our queue list belong to file_ext */
for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
DBG("remove list entry belong to file_ext\n");
heci_flush_list(dev->io_list_array[i], file_ext);
}
}
/**
* heci_flush_list - remove list entry belong to file_ext.
*
* @list: An instance of our list structure
* @file_ext: private data of the file object
*/
void heci_flush_list(struct io_heci_list *list,
struct heci_file_private *file_ext)
{
struct heci_file_private *file_ext_tmp;
struct heci_cb_private *priv_cb_pos = NULL;
struct heci_cb_private *priv_cb_next = NULL;
if (!list || !file_ext)
return;
if (list->status != 0)
return;
if (list_empty(&list->heci_cb.cb_list))
return;
list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
&list->heci_cb.cb_list, cb_list) {
if (priv_cb_pos) {
file_ext_tmp = (struct heci_file_private *)
priv_cb_pos->file_private;
if (file_ext_tmp) {
if (heci_fe_same_id(file_ext, file_ext_tmp))
list_del(&priv_cb_pos->cb_list);
}
}
}
}
/**
* heci_reset_iamthif_params - initializes heci device iamthif
*
* @dev: The heci device structure
*/
static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
{
/* reset iamthif parameters. */
dev->iamthif_current_cb = NULL;
dev->iamthif_msg_buf_size = 0;
dev->iamthif_msg_buf_index = 0;
dev->iamthif_canceled = 0;
dev->iamthif_file_ext.file = NULL;
dev->iamthif_ioctl = 0;
dev->iamthif_state = HECI_IAMTHIF_IDLE;
dev->iamthif_timer = 0;
}
/**
* init_heci_device - allocates and initializes the heci device structure
*
* @pdev: The pci device structure
*
* returns The heci_device_device pointer on success, NULL on failure.
*/
struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
{
int i;
struct iamt_heci_device *dev;
dev = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
if (!dev)
return NULL;
/* setup our list array */
dev->io_list_array[0] = &dev->read_list;
dev->io_list_array[1] = &dev->write_list;
dev->io_list_array[2] = &dev->write_waiting_list;
dev->io_list_array[3] = &dev->ctrl_wr_list;
dev->io_list_array[4] = &dev->ctrl_rd_list;
dev->io_list_array[5] = &dev->pthi_cmd_list;
dev->io_list_array[6] = &dev->pthi_read_complete_list;
INIT_LIST_HEAD(&dev->file_list);
INIT_LIST_HEAD(&dev->wd_file_ext.link);
INIT_LIST_HEAD(&dev->iamthif_file_ext.link);
spin_lock_init(&dev->device_lock);
init_waitqueue_head(&dev->wait_recvd_msg);
init_waitqueue_head(&dev->wait_stop_wd);
dev->heci_state = HECI_INITIALIZING;
dev->iamthif_state = HECI_IAMTHIF_IDLE;
/* init work for schedule work */
INIT_WORK(&dev->work, NULL);
for (i = 0; i < HECI_IO_LISTS_NUMBER; i++)
heci_initialize_list(dev->io_list_array[i], dev);
dev->pdev = pdev;
return dev;
}
static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
long timeout)
{
return wait_event_interruptible_timeout(dev->wait_recvd_msg,
(dev->recvd_msg), timeout);
}
/**
* heci_hw_init - init host and fw to start work.
*
* @dev: Device object for our driver
*
* returns 0 on success, <0 on failure.
*/
int heci_hw_init(struct iamt_heci_device *dev)
{
int err = 0;
dev->host_hw_state = read_heci_register(dev, H_CSR);
dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
dev->host_hw_state, dev->me_hw_state);
if ((dev->host_hw_state & H_IS) == H_IS) {
/* acknowledge interrupt and stop interupts */
heci_set_csr_register(dev);
}
dev->recvd_msg = 0;
DBG("reset in start the heci device.\n");
heci_reset(dev, 1);
DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
dev->host_hw_state, dev->me_hw_state);
/* wait for ME to turn on ME_RDY */
if (!dev->recvd_msg)
err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
if (!err && !dev->recvd_msg) {
dev->heci_state = HECI_DISABLED;
DBG("wait_event_interruptible_timeout failed"
"on wait for ME to turn on ME_RDY.\n");
return -ENODEV;
} else {
if (!(((dev->host_hw_state & H_RDY) == H_RDY)
&& ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
dev->heci_state = HECI_DISABLED;
DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
dev->host_hw_state,
dev->me_hw_state);
if (!(dev->host_hw_state & H_RDY) != H_RDY)
DBG("host turn off H_RDY.\n");
if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
DBG("ME turn off ME_RDY.\n");
printk(KERN_ERR
"heci: link layer initialization failed.\n");
return -ENODEV;
}
}
dev->recvd_msg = 0;
DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
dev->host_hw_state, dev->me_hw_state);
DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
printk(KERN_INFO "heci: link layer has been established.\n");
return 0;
}
/**
* heci_hw_reset - reset fw via heci csr register.
*
* @dev: Device object for our driver
* @interrupts: if interrupt should be enable after reset.
*/
static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
{
dev->host_hw_state |= (H_RST | H_IG);
if (interrupts)
heci_csr_enable_interrupts(dev);
else
heci_csr_disable_interrupts(dev);
BUG_ON((dev->host_hw_state & H_RST) != H_RST);
BUG_ON((dev->host_hw_state & H_RDY) != 0);
}
/**
* heci_reset - reset host and fw.
*
* @dev: Device object for our driver
* @interrupts: if interrupt should be enable after reset.
*/
void heci_reset(struct iamt_heci_device *dev, int interrupts)
{
struct heci_file_private *file_pos = NULL;
struct heci_file_private *file_next = NULL;
struct heci_cb_private *priv_cb_pos = NULL;
struct heci_cb_private *priv_cb_next = NULL;
int unexpected = 0;
if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
dev->need_reset = 1;
return;
}
if (dev->heci_state != HECI_INITIALIZING &&
dev->heci_state != HECI_DISABLED &&
dev->heci_state != HECI_POWER_DOWN &&
dev->heci_state != HECI_POWER_UP)
unexpected = 1;
if (dev->reinit_tsk != NULL) {
kthread_stop(dev->reinit_tsk);
dev->reinit_tsk = NULL;
}
dev->host_hw_state = read_heci_register(dev, H_CSR);
DBG("before reset host_hw_state = 0x%08x.\n",
dev->host_hw_state);
heci_hw_reset(dev, interrupts);
dev->host_hw_state &= ~H_RST;
dev->host_hw_state |= H_IG;
write_heci_register(dev, H_CSR, dev->host_hw_state);
DBG("currently saved host_hw_state = 0x%08x.\n",
dev->host_hw_state);
dev->need_reset = 0;
if (dev->heci_state != HECI_INITIALIZING) {
if ((dev->heci_state != HECI_DISABLED) &&
(dev->heci_state != HECI_POWER_DOWN))
dev->heci_state = HECI_RESETING;
list_for_each_entry_safe(file_pos,
file_next, &dev->file_list, link) {
file_pos->state = HECI_FILE_DISCONNECTED;
file_pos->flow_ctrl_creds = 0;
file_pos->read_cb = NULL;
file_pos->timer_count = 0;
}
/* remove entry if already in list */
DBG("list del iamthif and wd file list.\n");
heci_remove_client_from_file_list(dev,
dev->wd_file_ext.host_client_id);
heci_remove_client_from_file_list(dev,
dev->iamthif_file_ext.host_client_id);
heci_reset_iamthif_params(dev);
dev->wd_due_counter = 0;
dev->extra_write_index = 0;
}
dev->num_heci_me_clients = 0;
dev->rd_msg_hdr = 0;
dev->stop = 0;
dev->wd_pending = 0;
/* update the state of the registers after reset */
dev->host_hw_state = read_heci_register(dev, H_CSR);
dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
dev->host_hw_state, dev->me_hw_state);
if (unexpected)
printk(KERN_WARNING "heci: unexpected reset.\n");
/* Wake up all readings so they can be interrupted */
list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
if (&file_pos->rx_wait &&
waitqueue_active(&file_pos->rx_wait)) {
printk(KERN_INFO "heci: Waking up client!\n");
wake_up_interruptible(&file_pos->rx_wait);
}
}
/* remove all waiting requests */
if (dev->write_list.status == 0 &&
!list_empty(&dev->write_list.heci_cb.cb_list)) {
list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
&dev->write_list.heci_cb.cb_list, cb_list) {
if (priv_cb_pos) {
list_del(&priv_cb_pos->cb_list);
heci_free_cb_private(priv_cb_pos);
}
}
}
}
/**
* heci_initialize_clients - heci communication initialization.
*
* @dev: Device object for our driver
*/
int heci_initialize_clients(struct iamt_heci_device *dev)
{
int status;
msleep(100); /* FW needs time to be ready to talk with us */
DBG("link is established start sending messages.\n");
/* link is established start sending messages. */
status = host_start_message(dev);
if (status != 0) {
spin_lock_bh(&dev->device_lock);
dev->heci_state = HECI_DISABLED;
spin_unlock_bh(&dev->device_lock);
DBG("start sending messages failed.\n");
return status;
}
/* enumerate clients */
status = host_enum_clients_message(dev);
if (status != 0) {
spin_lock_bh(&dev->device_lock);
dev->heci_state = HECI_DISABLED;
spin_unlock_bh(&dev->device_lock);
DBG("enum clients failed.\n");
return status;
}
/* allocate storage for ME clients representation */
status = allocate_me_clients_storage(dev);
if (status != 0) {
spin_lock_bh(&dev->device_lock);
dev->num_heci_me_clients = 0;
dev->heci_state = HECI_DISABLED;
spin_unlock_bh(&dev->device_lock);
DBG("allocate clients failed.\n");
return status;
}
heci_check_asf_mode(dev);
/*heci initialization wd */
host_init_wd(dev);
/*heci initialization iamthif client */
host_init_iamthif(dev);
spin_lock_bh(&dev->device_lock);
if (dev->need_reset) {
dev->need_reset = 0;
dev->heci_state = HECI_DISABLED;
spin_unlock_bh(&dev->device_lock);
return -ENODEV;
}
memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
dev->open_handle_count = 0;
dev->heci_host_clients[0] |= 7;
dev->current_host_client_id = 3;
dev->heci_state = HECI_ENABLED;
spin_unlock_bh(&dev->device_lock);
DBG("initialization heci clients successful.\n");
return 0;
}
/**
* heci_task_initialize_clients - heci reinitialization task
*
* @data: Device object for our driver
*/
int heci_task_initialize_clients(void *data)
{
int ret;
struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
spin_lock_bh(&dev->device_lock);
if (dev->reinit_tsk != NULL) {
spin_unlock_bh(&dev->device_lock);
DBG("reinit task already started.\n");
return 0;
}
dev->reinit_tsk = current;
current->flags |= PF_NOFREEZE;
spin_unlock_bh(&dev->device_lock);
ret = heci_initialize_clients(dev);
spin_lock_bh(&dev->device_lock);
dev->reinit_tsk = NULL;
spin_unlock_bh(&dev->device_lock);
return ret;
}
/**
* host_start_message - heci host send start message.
*
* @dev: Device object for our driver
*
* returns 0 on success, <0 on failure.
*/
static int host_start_message(struct iamt_heci_device *dev)
{
long timeout = 60; /* 60 second */
struct heci_msg_hdr *heci_hdr;
struct hbm_host_version_request *host_start_req;
struct hbm_host_stop_request *host_stop_req;
int err = 0;
/* host start message */
heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
heci_hdr->host_addr = 0;
heci_hdr->me_addr = 0;
heci_hdr->length = sizeof(struct hbm_host_version_request);
heci_hdr->msg_complete = 1;
heci_hdr->reserved = 0;
host_start_req =
(struct hbm_host_version_request *) &dev->wr_msg_buf[1];
memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
host_start_req->cmd.cmd = HOST_START_REQ_CMD;
host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
dev->recvd_msg = 0;
if (!heci_write_message(dev, heci_hdr,
(unsigned char *) (host_start_req),
heci_hdr->length)) {
DBG("send version to fw fail.\n");
return -ENODEV;
}
DBG("call wait_event_interruptible_timeout for response message.\n");
/* wait for response */
err = heci_wait_event_int_timeout(dev, timeout * HZ);
if (!err && !dev->recvd_msg) {
DBG("wait_timeout failed on host start response message.\n");
return -ENODEV;
}
dev->recvd_msg = 0;
DBG("wait_timeout successful on host start response message.\n");
if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
(dev->version.minor_version != HBM_MINOR_VERSION)) {
/* send stop message */
heci_hdr->host_addr = 0;
heci_hdr->me_addr = 0;
heci_hdr->length = sizeof(struct hbm_host_stop_request);
heci_hdr->msg_complete = 1;
heci_hdr->reserved = 0;
host_stop_req =
(struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
host_stop_req->reason = DRIVER_STOP_REQUEST;
heci_write_message(dev, heci_hdr,
(unsigned char *) (host_stop_req),
heci_hdr->length);
DBG("version mismatch.\n");
return -ENODEV;
}
return 0;
}
/**
* host_enum_clients_message - host send enumeration client request message.
*
* @dev: Device object for our driver
*
* returns 0 on success, <0 on failure.
*/
static int host_enum_clients_message(struct iamt_heci_device *dev)
{
long timeout = 5; /*5 second */
struct heci_msg_hdr *heci_hdr;
struct hbm_host_enum_request *host_enum_req;
int err = 0;
int i, j;
heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
/* enumerate clients */
heci_hdr->host_addr = 0;
heci_hdr->me_addr = 0;
heci_hdr->length = sizeof(struct hbm_host_enum_request);
heci_hdr->msg_complete = 1;
heci_hdr->reserved = 0;
host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
if (!heci_write_message(dev, heci_hdr,
(unsigned char *) (host_enum_req),
heci_hdr->length)) {
DBG("send enumeration request failed.\n");
return -ENODEV;
}
/* wait for response */
dev->recvd_msg = 0;
err = heci_wait_event_int_timeout(dev, timeout * HZ);
if (!err && !dev->recvd_msg) {
DBG("wait_event_interruptible_timeout failed "
"on enumeration clients response message.\n");
return -ENODEV;
}
dev->recvd_msg = 0;
spin_lock_bh(&dev->device_lock);
/* count how many ME clients we have */
for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
for (j = 0; j < 8; j++) {
if ((dev->heci_me_clients[i] & (1 << j)) != 0)
dev->num_heci_me_clients++;
}
}
spin_unlock_bh(&dev->device_lock);
return 0;
}
/**
* host_client_properties - reads properties for client
*
* @dev: Device object for our driver
* @idx: client index in me client array
* @client_id: id of the client
*
* returns 0 on success, <0 on failure.
*/
static int host_client_properties(struct iamt_heci_device *dev,
struct heci_me_client *client)
{
struct heci_msg_hdr *heci_hdr;
struct hbm_props_request *host_cli_req;
int err;
heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
heci_hdr->host_addr = 0;
heci_hdr->me_addr = 0;
heci_hdr->length = sizeof(struct hbm_props_request);
heci_hdr->msg_complete = 1;
heci_hdr->reserved = 0;
host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
memset(host_cli_req, 0, sizeof(struct hbm_props_request));
host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
host_cli_req->address = client->client_id;
if (!heci_write_message(dev, heci_hdr,
(unsigned char *) (host_cli_req),
heci_hdr->length)) {
DBG("send props request failed.\n");
return -ENODEV;
}
/* wait for response */
dev->recvd_msg = 0;
err = heci_wait_event_int_timeout(dev, 10 * HZ);
if (!err && !dev->recvd_msg) {
DBG("wait failed on props resp msg.\n");
return -ENODEV;
}
dev->recvd_msg = 0;
return 0;
}
/**
* allocate_me_clients_storage - allocate storage for me clients
*
* @dev: Device object for our driver
*
* returns 0 on success, <0 on failure.
*/
static int allocate_me_clients_storage(struct iamt_heci_device *dev)
{
struct heci_me_client *clients;
struct heci_me_client *client;
__u8 num, i, j;
int err;
if (dev->num_heci_me_clients <= 0)
return 0;
spin_lock_bh(&dev->device_lock);
kfree(dev->me_clients);
dev->me_clients = NULL;
spin_unlock_bh(&dev->device_lock);
/* allocate storage for ME clients representation */
clients = kcalloc(dev->num_heci_me_clients,
sizeof(struct heci_me_client), GFP_KERNEL);
if (!clients) {
DBG("memory allocation for ME clients failed.\n");
return -ENOMEM;
}
spin_lock_bh(&dev->device_lock);
dev->me_clients = clients;
spin_unlock_bh(&dev->device_lock);
num = 0;
for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
for (j = 0; j < 8; j++) {
if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
client = &dev->me_clients[num];
client->client_id = (i * 8) + j;
client->flow_ctrl_creds = 0;
err = host_client_properties(dev, client);
if (err != 0) {
spin_lock_bh(&dev->device_lock);
kfree(dev->me_clients);
dev->me_clients = NULL;
spin_unlock_bh(&dev->device_lock);
return err;
}
num++;
}
}
}
return 0;
}
/**
* heci_init_file_private - initializes private file structure.
*
* @priv: private file structure to be initialized
* @file: the file structure
*/
static void heci_init_file_private(struct heci_file_private *priv,
struct file *file)
{
memset(priv, 0, sizeof(struct heci_file_private));
spin_lock_init(&priv->file_lock);
spin_lock_init(&priv->read_io_lock);
spin_lock_init(&priv->write_io_lock);
init_waitqueue_head(&priv->wait);
init_waitqueue_head(&priv->rx_wait);
DBG("priv->rx_wait =%p\n", &priv->rx_wait);
init_waitqueue_head(&priv->tx_wait);
INIT_LIST_HEAD(&priv->link);
priv->reading_state = HECI_IDLE;
priv->writing_state = HECI_IDLE;
}
/**
* heci_find_me_client - search for ME client guid
* sets client_id in heci_file_private if found
* @dev: Device object for our driver
* @priv: private file structure to set client_id in
* @cguid: searched guid of ME client
* @client_id: id of host client to be set in file private structure
*
* returns ME client index
*/
static __u8 heci_find_me_client(struct iamt_heci_device *dev,
struct heci_file_private *priv,
const struct guid *cguid, __u8 client_id)
{
__u8 i;
if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
return 0;
for (i = 0; i < dev->num_heci_me_clients; i++) {
if (memcmp(cguid,
&dev->me_clients[i].props.protocol_name,
sizeof(struct guid)) == 0) {
priv->me_client_id = dev->me_clients[i].client_id;
priv->state = HECI_FILE_CONNECTING;
priv->host_client_id = client_id;
list_add_tail(&priv->link, &dev->file_list);
return i;
}
}
return 0;
}
/**
* heci_check_asf_mode - check for ASF client
*
* @dev: Device object for our driver
*/
static void heci_check_asf_mode(struct iamt_heci_device *dev)
{
__u8 i;
spin_lock_bh(&dev->device_lock);
dev->asf_mode = 0;
/* find ME ASF client - otherwise assume AMT mode */
DBG("find ME ASF client - otherwise assume AMT mode.\n");
for (i = 0; i < dev->num_heci_me_clients; i++) {
if (memcmp(&heci_asf_guid,
&dev->me_clients[i].props.protocol_name,
sizeof(struct guid)) == 0) {
dev->asf_mode = 1;
spin_unlock_bh(&dev->device_lock);
DBG("found ME ASF client.\n");
return;
}
}
spin_unlock_bh(&dev->device_lock);
DBG("assume AMT mode.\n");
}
/**
* heci_connect_me_client - connect ME client
* @dev: Device object for our driver
* @priv: private file structure
* @timeout: connect timeout in seconds
*
* returns 1 - if connected, 0 - if not
*/
static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
struct heci_file_private *priv,
long timeout)
{
int err = 0;
if ((dev == NULL) || (priv == NULL))
return 0;
if (!heci_connect(dev, priv)) {
DBG("failed to call heci_connect for client_id=%d.\n",
priv->host_client_id);
spin_lock_bh(&dev->device_lock);
heci_remove_client_from_file_list(dev, priv->host_client_id);
priv->state = HECI_FILE_DISCONNECTED;
spin_unlock_bh(&dev->device_lock);
return 0;
}
err = wait_event_timeout(dev->wait_recvd_msg,
(HECI_FILE_CONNECTED == priv->state ||
HECI_FILE_DISCONNECTED == priv->state),
timeout * HZ);
if (HECI_FILE_CONNECTED != priv->state) {
spin_lock_bh(&dev->device_lock);
heci_remove_client_from_file_list(dev, priv->host_client_id);
DBG("failed to connect client_id=%d state=%d.\n",
priv->host_client_id, priv->state);
if (err)
DBG("failed connect err=%08x\n", err);
priv->state = HECI_FILE_DISCONNECTED;
spin_unlock_bh(&dev->device_lock);
return 0;
}
DBG("successfully connected client_id=%d.\n",
priv->host_client_id);
return 1;
}
/**
* host_init_wd - heci initialization wd.
*
* @dev: Device object for our driver
*/
static void host_init_wd(struct iamt_heci_device *dev)
{
spin_lock_bh(&dev->device_lock);
heci_init_file_private(&dev->wd_file_ext, NULL);
/* look for WD client and connect to it */
dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
dev->wd_timeout = 0;
if (dev->asf_mode) {
memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
} else {
/* AMT mode */
dev->wd_timeout = AMT_WD_VALUE;
DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
memcpy(dev->wd_data, heci_start_wd_params, HECI_WD_PARAMS_SIZE);
memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
&dev->wd_timeout, sizeof(__u16));
}
/* find ME WD client */
heci_find_me_client(dev, &dev->wd_file_ext,
&heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
spin_unlock_bh(&dev->device_lock);
DBG("check wd_file_ext\n");
if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
if (dev->wd_timeout != 0)
dev->wd_due_counter = 1;
else
dev->wd_due_counter = 0;
DBG("successfully connected to WD client.\n");
}
} else
DBG("failed to find WD client.\n");
spin_lock_bh(&dev->device_lock);
dev->wd_timer.function = &heci_wd_timer;
dev->wd_timer.data = (unsigned long) dev;
spin_unlock_bh(&dev->device_lock);
}
/**
* host_init_iamthif - heci initialization iamthif client.
*
* @dev: Device object for our driver
*
*/
static void host_init_iamthif(struct iamt_heci_device *dev)
{
__u8 i;
spin_lock_bh(&dev->device_lock);
heci_init_file_private(&dev->iamthif_file_ext, NULL);
dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
/* find ME PTHI client */
i = heci_find_me_client(dev, &dev->iamthif_file_ext,
&heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) {
DBG("failed to find iamthif client.\n");
spin_unlock_bh(&dev->device_lock);
return;
}
BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
spin_unlock_bh(&dev->device_lock);
if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) {
DBG("connected to iamthif client.\n");
dev->iamthif_state = HECI_IAMTHIF_IDLE;
}
}
/**
* heci_alloc_file_private - allocates a private file structure and set it up.
* @file: the file structure
*
* returns The allocated file or NULL on failure
*/
struct heci_file_private *heci_alloc_file_private(struct file *file)
{
struct heci_file_private *priv;
priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
if (!priv)
return NULL;
heci_init_file_private(priv, file);
return priv;
}
/**
* heci_disconnect_host_client - send disconnect message to fw from host client.
*
* @dev: Device object for our driver
* @file_ext: private data of the file object
*
* returns 0 on success, <0 on failure.
*/
int heci_disconnect_host_client(struct iamt_heci_device *dev,
struct heci_file_private *file_ext)
{
int rets, err;
long timeout = 15; /* 15 seconds */
struct heci_cb_private *priv_cb;
if ((!dev) || (!file_ext))
return -ENODEV;
if (file_ext->state != HECI_FILE_DISCONNECTING)
return 0;
priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
if (!priv_cb)
return -ENOMEM;
INIT_LIST_HEAD(&priv_cb->cb_list);
priv_cb->file_private = file_ext;
priv_cb->major_file_operations = HECI_CLOSE;
spin_lock_bh(&dev->device_lock);
if (dev->host_buffer_is_empty) {
dev->host_buffer_is_empty = 0;
if (heci_disconnect(dev, file_ext)) {
mdelay(10); /* Wait for hardware disconnection ready */
list_add_tail(&priv_cb->cb_list,
&dev->ctrl_rd_list.heci_cb.cb_list);
} else {
spin_unlock_bh(&dev->device_lock);
rets = -ENODEV;
DBG("failed to call heci_disconnect.\n");
goto free;
}
} else {
DBG("add disconnect cb to control write list\n");
list_add_tail(&priv_cb->cb_list,
&dev->ctrl_wr_list.heci_cb.cb_list);
}
spin_unlock_bh(&dev->device_lock);
err = wait_event_timeout(dev->wait_recvd_msg,
(HECI_FILE_DISCONNECTED == file_ext->state),
timeout * HZ);
if (HECI_FILE_DISCONNECTED == file_ext->state) {
rets = 0;
DBG("successfully disconnected from fw client.\n");
} else {
rets = -ENODEV;
if (HECI_FILE_DISCONNECTED != file_ext->state)
DBG("wrong status client disconnect.\n");
if (err)
DBG("wait failed disconnect err=%08x\n", err);
DBG("failed to disconnect from fw client.\n");
}
spin_lock_bh(&dev->device_lock);
heci_flush_list(&dev->ctrl_rd_list, file_ext);
heci_flush_list(&dev->ctrl_wr_list, file_ext);
spin_unlock_bh(&dev->device_lock);
free:
heci_free_cb_private(priv_cb);
return rets;
}
/**
* heci_remove_client_from_file_list -
* remove file private data from device file list
*
* @dev: Device object for our driver
* @host_client_id: host client id to be removed
*/
void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
__u8 host_client_id)
{
struct heci_file_private *file_pos = NULL;
struct heci_file_private *file_next = NULL;
list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
if (host_client_id == file_pos->host_client_id) {
DBG("remove host client = %d, ME client = %d\n",
file_pos->host_client_id,
file_pos->me_client_id);
list_del_init(&file_pos->link);
break;
}
}
}
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