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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/moduleparam.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/aio.h>
#include <linux/pci.h>
#include <linux/reboot.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/kdev_t.h>
#include <linux/ioctl.h>
#include <linux/cdev.h>
#include <linux/list.h>
#include <linux/unistd.h>
#include <linux/delay.h>
#include "heci_data_structures.h"
#include "heci.h"
#include "heci_interface.h"
#include "heci_version.h"
/**
* heci_ioctl_get_version - the get driver version IOCTL function
*
* @dev: Device object for our driver
* @if_num: minor number
* @*u_msg: pointer to user data struct in user space
* @k_msg: data in kernel on the stack
* @file_ext: private data of the file object
*
* returns 0 on success, <0 on failure.
*/
int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
struct heci_message_data __user *u_msg,
struct heci_message_data k_msg,
struct heci_file_private *file_ext)
{
int rets = 0;
struct heci_driver_version *version;
struct heci_message_data res_msg;
if ((if_num != HECI_MINOR_NUMBER) || (!dev)
|| (!file_ext))
return -ENODEV;
if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
DBG("user buffer less than heci_driver_version.\n");
return -EMSGSIZE;
}
res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
if (!res_msg.data) {
DBG("failed allocation response buffer size = %d.\n",
(int) sizeof(struct heci_driver_version));
return -ENOMEM;
}
version = (struct heci_driver_version *) res_msg.data;
version->major = MAJOR_VERSION;
version->minor = MINOR_VERSION;
version->hotfix = QUICK_FIX_NUMBER;
version->build = VER_BUILD;
res_msg.size = sizeof(struct heci_driver_version);
if (k_msg.size < sizeof(struct heci_driver_version))
res_msg.size -= 2;
rets = file_ext->status;
/* now copy the data to user space */
if (copy_to_user((void __user *)k_msg.data, res_msg.data, res_msg.size)) {
rets = -EFAULT;
goto end;
}
if (put_user(res_msg.size, &u_msg->size)) {
rets = -EFAULT;
goto end;
}
end:
kfree(res_msg.data);
return rets;
}
/**
* heci_ioctl_connect_client - the connect to fw client IOCTL function
*
* @dev: Device object for our driver
* @if_num: minor number
* @*u_msg: pointer to user data struct in user space
* @k_msg: data in kernel on the stack
* @file_ext: private data of the file object
*
* returns 0 on success, <0 on failure.
*/
int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
struct heci_message_data __user *u_msg,
struct heci_message_data k_msg,
struct file *file)
{
int rets = 0;
struct heci_message_data req_msg, res_msg;
struct heci_cb_private *priv_cb = NULL;
struct heci_client *client;
struct heci_file_private *file_ext;
struct heci_file_private *file_pos = NULL;
struct heci_file_private *file_next = NULL;
long timeout = 15; /*15 second */
__u8 i;
int err = 0;
if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
return -ENODEV;
file_ext = file->private_data;
if (!file_ext)
return -ENODEV;
if (k_msg.size != sizeof(struct guid)) {
DBG("user buffer size is not equal to size of struct "
"guid(16).\n");
return -EMSGSIZE;
}
if (!k_msg.data)
return -EIO;
req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
if (!res_msg.data) {
DBG("failed allocation response buffer size = %d.\n",
(int) sizeof(struct heci_client));
kfree(req_msg.data);
return -ENOMEM;
}
if (!req_msg.data) {
DBG("failed allocation request buffer size = %d.\n",
(int) sizeof(struct guid));
kfree(res_msg.data);
return -ENOMEM;
}
req_msg.size = sizeof(struct guid);
res_msg.size = sizeof(struct heci_client);
/* copy the message to kernel space -
* use a pointer already copied into kernel space
*/
if (copy_from_user(req_msg.data, (void __user *)k_msg.data, k_msg.size)) {
rets = -EFAULT;
goto end;
}
/* buffered ioctl cb */
priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
if (!priv_cb) {
rets = -ENOMEM;
goto end;
}
INIT_LIST_HEAD(&priv_cb->cb_list);
priv_cb->response_buffer.data = res_msg.data;
priv_cb->response_buffer.size = res_msg.size;
priv_cb->request_buffer.data = req_msg.data;
priv_cb->request_buffer.size = req_msg.size;
priv_cb->major_file_operations = HECI_IOCTL;
spin_lock_bh(&dev->device_lock);
if (dev->heci_state != HECI_ENABLED) {
rets = -ENODEV;
spin_unlock_bh(&dev->device_lock);
goto end;
}
if ((file_ext->state != HECI_FILE_INITIALIZING) &&
(file_ext->state != HECI_FILE_DISCONNECTED)) {
rets = -EBUSY;
spin_unlock_bh(&dev->device_lock);
goto end;
}
/* find ME client we're trying to connect to */
for (i = 0; i < dev->num_heci_me_clients; i++) {
if (memcmp((struct guid *)req_msg.data,
&dev->me_clients[i].props.protocol_name,
sizeof(struct guid)) == 0) {
if (dev->me_clients[i].props.fixed_address == 0) {
file_ext->me_client_id =
dev->me_clients[i].client_id;
file_ext->state = HECI_FILE_CONNECTING;
}
break;
}
}
/* if we're connecting to PTHI client so we will use the exist
* connection
*/
if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
sizeof(struct guid)) == 0) {
if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
rets = -ENODEV;
spin_unlock_bh(&dev->device_lock);
goto end;
}
dev->heci_host_clients[file_ext->host_client_id / 8] &=
~(1 << (file_ext->host_client_id % 8));
list_for_each_entry_safe(file_pos,
file_next, &dev->file_list, link) {
if (heci_fe_same_id(file_ext, file_pos)) {
DBG("remove file private data node host"
" client = %d, ME client = %d.\n",
file_pos->host_client_id,
file_pos->me_client_id);
list_del(&file_pos->link);
}
}
DBG("free file private data memory.\n");
kfree(file_ext);
file_ext = NULL;
file->private_data = &dev->iamthif_file_ext;
client = (struct heci_client *) res_msg.data;
client->max_msg_length =
dev->me_clients[i].props.max_msg_length;
client->protocol_version =
dev->me_clients[i].props.protocol_version;
rets = dev->iamthif_file_ext.status;
spin_unlock_bh(&dev->device_lock);
/* now copy the data to user space */
if (copy_to_user((void __user *)k_msg.data,
res_msg.data, res_msg.size)) {
rets = -EFAULT;
goto end;
}
if (put_user(res_msg.size, &u_msg->size)) {
rets = -EFAULT;
goto end;
}
goto end;
}
spin_unlock_bh(&dev->device_lock);
spin_lock(&file_ext->file_lock);
spin_lock_bh(&dev->device_lock);
if (file_ext->state != HECI_FILE_CONNECTING) {
rets = -ENODEV;
spin_unlock_bh(&dev->device_lock);
spin_unlock(&file_ext->file_lock);
goto end;
}
/* prepare the output buffer */
client = (struct heci_client *) res_msg.data;
client->max_msg_length = dev->me_clients[i].props.max_msg_length;
client->protocol_version = dev->me_clients[i].props.protocol_version;
if (dev->host_buffer_is_empty
&& !other_client_is_connecting(dev, file_ext)) {
dev->host_buffer_is_empty = 0;
if (!heci_connect(dev, file_ext)) {
rets = -ENODEV;
spin_unlock_bh(&dev->device_lock);
spin_unlock(&file_ext->file_lock);
goto end;
} else {
file_ext->timer_count = HECI_CONNECT_TIMEOUT;
priv_cb->file_private = file_ext;
list_add_tail(&priv_cb->cb_list,
&dev->ctrl_rd_list.heci_cb.
cb_list);
}
} else {
priv_cb->file_private = file_ext;
DBG("add connect 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);
spin_unlock(&file_ext->file_lock);
err = wait_event_timeout(dev->wait_recvd_msg,
(HECI_FILE_CONNECTED == file_ext->state
|| HECI_FILE_DISCONNECTED == file_ext->state),
timeout * HZ);
spin_lock_bh(&dev->device_lock);
if (HECI_FILE_CONNECTED == file_ext->state) {
spin_unlock_bh(&dev->device_lock);
DBG("successfully connected to FW client.\n");
rets = file_ext->status;
/* now copy the data to user space */
if (copy_to_user((void __user *)k_msg.data,
res_msg.data, res_msg.size)) {
rets = -EFAULT;
goto end;
}
if (put_user(res_msg.size, &u_msg->size)) {
rets = -EFAULT;
goto end;
}
goto end;
} else {
DBG("failed to connect to FW client.file_ext->state = %d.\n",
file_ext->state);
spin_unlock_bh(&dev->device_lock);
if (!err) {
DBG("wait_event_interruptible_timeout failed on client"
" connect message fw response message.\n");
}
rets = -EFAULT;
goto remove_list;
}
remove_list:
if (priv_cb) {
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);
}
end:
DBG("free connect cb memory.");
kfree(req_msg.data);
kfree(res_msg.data);
kfree(priv_cb);
return rets;
}
/**
* heci_ioctl_wd - the wd IOCTL function
*
* @dev: Device object for our driver
* @if_num: minor number
* @k_msg: data in kernel on the stack
* @file_ext: private data of the file object
*
* returns 0 on success, <0 on failure.
*/
int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
struct heci_message_data k_msg,
struct heci_file_private *file_ext)
{
int rets = 0;
struct heci_message_data req_msg; /*in kernel on the stack */
if (if_num != HECI_MINOR_NUMBER)
return -ENODEV;
spin_lock(&file_ext->file_lock);
if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
DBG("user buffer has invalid size.\n");
spin_unlock(&file_ext->file_lock);
return -EMSGSIZE;
}
spin_unlock(&file_ext->file_lock);
req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
if (!req_msg.data) {
DBG("failed allocation request buffer size = %d.\n",
HECI_WATCHDOG_DATA_SIZE);
return -ENOMEM;
}
req_msg.size = HECI_WATCHDOG_DATA_SIZE;
/* copy the message to kernel space - use a pointer already
* copied into kernel space
*/
if (copy_from_user(req_msg.data,
(void __user *)k_msg.data, req_msg.size)) {
rets = -EFAULT;
goto end;
}
spin_lock_bh(&dev->device_lock);
if (dev->heci_state != HECI_ENABLED) {
rets = -ENODEV;
spin_unlock_bh(&dev->device_lock);
goto end;
}
if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
rets = -ENODEV;
spin_unlock_bh(&dev->device_lock);
goto end;
}
if (!dev->asf_mode) {
rets = -EIO;
spin_unlock_bh(&dev->device_lock);
goto end;
}
memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
HECI_WATCHDOG_DATA_SIZE);
dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
dev->wd_pending = 0;
dev->wd_due_counter = 1; /* next timer */
if (dev->wd_timeout == 0) {
memcpy(dev->wd_data, heci_stop_wd_params,
HECI_WD_PARAMS_SIZE);
} else {
memcpy(dev->wd_data, heci_start_wd_params,
HECI_WD_PARAMS_SIZE);
mod_timer(&dev->wd_timer, jiffies);
}
spin_unlock_bh(&dev->device_lock);
end:
kfree(req_msg.data);
return rets;
}
/**
* heci_ioctl_bypass_wd - the bypass_wd IOCTL function
*
* @dev: Device object for our driver
* @if_num: minor number
* @k_msg: data in kernel on the stack
* @file_ext: private data of the file object
*
* returns 0 on success, <0 on failure.
*/
int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
struct heci_message_data k_msg,
struct heci_file_private *file_ext)
{
__u8 flag = 0;
int rets = 0;
if (if_num != HECI_MINOR_NUMBER)
return -ENODEV;
spin_lock(&file_ext->file_lock);
if (k_msg.size < 1) {
DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE.\n");
spin_unlock(&file_ext->file_lock);
return -EMSGSIZE;
}
spin_unlock(&file_ext->file_lock);
if (copy_from_user(&flag, (void __user *)k_msg.data, 1)) {
rets = -EFAULT;
goto end;
}
spin_lock_bh(&dev->device_lock);
flag = flag ? (1) : (0);
dev->wd_bypass = flag;
spin_unlock_bh(&dev->device_lock);
end:
return rets;
}
/**
* find_pthi_read_list_entry - finds a PTHIlist entry for current file
*
* @dev: Device object for our driver
* @file: pointer to file object
*
* returns returned a list entry on success, NULL on failure.
*/
struct heci_cb_private *find_pthi_read_list_entry(
struct iamt_heci_device *dev,
struct file *file)
{
struct heci_file_private *file_ext_temp;
struct heci_cb_private *priv_cb_pos = NULL;
struct heci_cb_private *priv_cb_next = NULL;
if ((dev->pthi_read_complete_list.status == 0) &&
!list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
&dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
file_ext_temp = (struct heci_file_private *)
priv_cb_pos->file_private;
if ((file_ext_temp != NULL) &&
(file_ext_temp == &dev->iamthif_file_ext) &&
(priv_cb_pos->file_object == file))
return priv_cb_pos;
}
}
return NULL;
}
/**
* pthi_read - read data from pthi client
*
* @dev: Device object for our driver
* @if_num: minor number
* @file: pointer to file object
* @*ubuf: pointer to user data in user space
* @length: data length to read
* @offset: data read offset
*
* returns
* returned data length on success,
* zero if no data to read,
* negative on failure.
*/
int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
char __user *ubuf, size_t length, loff_t *offset)
{
int rets = 0;
struct heci_cb_private *priv_cb = NULL;
struct heci_file_private *file_ext = file->private_data;
__u8 i;
unsigned long currtime = get_seconds();
if ((if_num != HECI_MINOR_NUMBER) || (!dev))
return -ENODEV;
if ((file_ext == NULL) || (file_ext != &dev->iamthif_file_ext))
return -ENODEV;
spin_lock_bh(&dev->device_lock);
for (i = 0; i < dev->num_heci_me_clients; i++) {
if (dev->me_clients[i].client_id ==
dev->iamthif_file_ext.me_client_id)
break;
}
BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
if ((i == dev->num_heci_me_clients)
|| (dev->me_clients[i].client_id !=
dev->iamthif_file_ext.me_client_id)) {
DBG("PTHI client not found.\n");
spin_unlock_bh(&dev->device_lock);
return -ENODEV;
}
priv_cb = find_pthi_read_list_entry(dev, file);
if (!priv_cb) {
spin_unlock_bh(&dev->device_lock);
return 0; /* No more data to read */
} else {
if (priv_cb &&
(currtime - priv_cb->read_time > IAMTHIF_READ_TIMER)) {
/* 15 sec for the message has expired */
list_del(&priv_cb->cb_list);
spin_unlock_bh(&dev->device_lock);
rets = -ETIMEDOUT;
goto free;
}
/* if the whole message will fit remove it from the list */
if ((priv_cb->information >= *offset) &&
(length >= (priv_cb->information - *offset)))
list_del(&priv_cb->cb_list);
else if ((priv_cb->information > 0) &&
(priv_cb->information <= *offset)) {
/* end of the message has been reached */
list_del(&priv_cb->cb_list);
rets = 0;
spin_unlock_bh(&dev->device_lock);
goto free;
}
/* else means that not full buffer will be read and do not
* remove message from deletion list
*/
}
DBG("pthi priv_cb->response_buffer size - %d\n",
priv_cb->response_buffer.size);
DBG("pthi priv_cb->information - %lu\n",
priv_cb->information);
spin_unlock_bh(&dev->device_lock);
/* length is being turncated to PAGE_SIZE, however,
* the information may be longer */
length = length < (priv_cb->information - *offset) ?
length : (priv_cb->information - *offset);
if (copy_to_user(ubuf,
priv_cb->response_buffer.data + *offset,
length))
rets = -EFAULT;
else {
rets = length;
if ((*offset + length) < priv_cb->information) {
*offset += length;
goto out;
}
}
free:
DBG("free pthi cb memory.\n");
*offset = 0;
heci_free_cb_private(priv_cb);
out:
return rets;
}
/**
* heci_start_read - the start read client message function.
*
* @dev: Device object for our driver
* @if_num: minor number
* @file_ext: private data of the file object
*
* returns 0 on success, <0 on failure.
*/
int heci_start_read(struct iamt_heci_device *dev, int if_num,
struct heci_file_private *file_ext)
{
int rets = 0;
__u8 i;
struct heci_cb_private *priv_cb = NULL;
if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
DBG("received wrong function input param.\n");
return -ENODEV;
}
spin_lock_bh(&dev->device_lock);
if (file_ext->state != HECI_FILE_CONNECTED) {
spin_unlock_bh(&dev->device_lock);
return -ENODEV;
}
if (dev->heci_state != HECI_ENABLED) {
spin_unlock_bh(&dev->device_lock);
return -ENODEV;
}
spin_unlock_bh(&dev->device_lock);
DBG("check if read is pending.\n");
spin_lock_bh(&file_ext->read_io_lock);
if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
DBG("read is pending.\n");
spin_unlock_bh(&file_ext->read_io_lock);
return -EBUSY;
}
spin_unlock_bh(&file_ext->read_io_lock);
priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
if (!priv_cb)
return -ENOMEM;
spin_lock_bh(&file_ext->read_io_lock);
DBG("allocation call back success\n"
"host client = %d, ME client = %d\n",
file_ext->host_client_id, file_ext->me_client_id);
spin_unlock_bh(&file_ext->read_io_lock);
spin_lock_bh(&dev->device_lock);
spin_lock_bh(&file_ext->read_io_lock);
for (i = 0; i < dev->num_heci_me_clients; i++) {
if (dev->me_clients[i].client_id == file_ext->me_client_id)
break;
}
BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
spin_unlock_bh(&file_ext->read_io_lock);
if (i == dev->num_heci_me_clients) {
rets = -ENODEV;
goto unlock;
}
priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
spin_unlock_bh(&dev->device_lock);
priv_cb->response_buffer.data =
kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
if (!priv_cb->response_buffer.data) {
rets = -ENOMEM;
goto fail;
}
DBG("allocation call back data success.\n");
priv_cb->major_file_operations = HECI_READ;
/* make sure information is zero before we start */
priv_cb->information = 0;
priv_cb->file_private = (void *) file_ext;
spin_lock_bh(&dev->device_lock);
spin_lock_bh(&file_ext->read_io_lock);
file_ext->read_cb = priv_cb;
if (dev->host_buffer_is_empty) {
dev->host_buffer_is_empty = 0;
if (!heci_send_flow_control(dev, file_ext)) {
rets = -ENODEV;
spin_unlock_bh(&file_ext->read_io_lock);
goto unlock;
} else {
list_add_tail(&priv_cb->cb_list,
&dev->read_list.heci_cb.cb_list);
}
} else {
list_add_tail(&priv_cb->cb_list,
&dev->ctrl_wr_list.heci_cb.cb_list);
}
spin_unlock_bh(&file_ext->read_io_lock);
spin_unlock_bh(&dev->device_lock);
return rets;
unlock:
spin_unlock_bh(&dev->device_lock);
fail:
heci_free_cb_private(priv_cb);
return rets;
}
/**
* pthi_write - write iamthif data to pthi client
*
* @dev: Device object for our driver
* @priv_cb: heci call back struct
*
* returns 0 on success, <0 on failure.
*/
int pthi_write(struct iamt_heci_device *dev,
struct heci_cb_private *priv_cb)
{
int rets = 0;
struct heci_msg_hdr heci_hdr;
if ((!dev) || (!priv_cb))
return -ENODEV;
DBG("write data to pthi client.\n");
dev->iamthif_state = HECI_IAMTHIF_WRITING;
dev->iamthif_current_cb = priv_cb;
dev->iamthif_file_object = priv_cb->file_object;
dev->iamthif_canceled = 0;
dev->iamthif_ioctl = 1;
dev->iamthif_msg_buf_size = priv_cb->request_buffer.size;
memcpy(dev->iamthif_msg_buf, priv_cb->request_buffer.data,
priv_cb->request_buffer.size);
if (flow_ctrl_creds(dev, &dev->iamthif_file_ext) &&
dev->host_buffer_is_empty) {
dev->host_buffer_is_empty = 0;
if (priv_cb->request_buffer.size >
(((dev->host_hw_state & H_CBD) >> 24) *
sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
heci_hdr.length =
(((dev->host_hw_state & H_CBD) >> 24) *
sizeof(__u32)) - sizeof(struct heci_msg_hdr);
heci_hdr.msg_complete = 0;
} else {
heci_hdr.length = priv_cb->request_buffer.size;
heci_hdr.msg_complete = 1;
}
heci_hdr.host_addr = dev->iamthif_file_ext.host_client_id;
heci_hdr.me_addr = dev->iamthif_file_ext.me_client_id;
heci_hdr.reserved = 0;
dev->iamthif_msg_buf_index += heci_hdr.length;
if (!heci_write_message(dev, &heci_hdr,
(unsigned char *)(dev->iamthif_msg_buf),
heci_hdr.length))
return -ENODEV;
if (heci_hdr.msg_complete) {
flow_ctrl_reduce(dev, &dev->iamthif_file_ext);
dev->iamthif_flow_control_pending = 1;
dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
DBG("add pthi cb to write waiting list\n");
dev->iamthif_current_cb = priv_cb;
dev->iamthif_file_object = priv_cb->file_object;
list_add_tail(&priv_cb->cb_list,
&dev->write_waiting_list.heci_cb.cb_list);
} else {
DBG("message does not complete, "
"so add pthi cb to write list.\n");
list_add_tail(&priv_cb->cb_list,
&dev->write_list.heci_cb.cb_list);
}
} else {
if (!(dev->host_buffer_is_empty))
DBG("host buffer is not empty");
DBG("No flow control credentials, "
"so add iamthif cb to write list.\n");
list_add_tail(&priv_cb->cb_list,
&dev->write_list.heci_cb.cb_list);
}
return rets;
}
/**
* iamthif_ioctl_send_msg - send cmd data to pthi client
*
* @dev: Device object for our driver
*
* returns 0 on success, <0 on failure.
*/
void run_next_iamthif_cmd(struct iamt_heci_device *dev)
{
struct heci_file_private *file_ext_tmp;
struct heci_cb_private *priv_cb_pos = NULL;
struct heci_cb_private *priv_cb_next = NULL;
int status = 0;
if (!dev)
return;
dev->iamthif_msg_buf_size = 0;
dev->iamthif_msg_buf_index = 0;
dev->iamthif_canceled = 0;
dev->iamthif_ioctl = 1;
dev->iamthif_state = HECI_IAMTHIF_IDLE;
dev->iamthif_timer = 0;
dev->iamthif_file_object = NULL;
if (dev->pthi_cmd_list.status == 0 &&
!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
DBG("complete pthi cmd_list cb.\n");
list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
&dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
list_del(&priv_cb_pos->cb_list);
file_ext_tmp = (struct heci_file_private *)
priv_cb_pos->file_private;
if ((file_ext_tmp != NULL) &&
(file_ext_tmp == &dev->iamthif_file_ext)) {
status = pthi_write(dev, priv_cb_pos);
if (status != 0) {
DBG("pthi write failed status = %d\n",
status);
return;
}
break;
}
}
}
}
/**
* heci_free_cb_private - free heci_cb_private related memory
*
* @priv_cb: heci callback struct
*/
void heci_free_cb_private(struct heci_cb_private *priv_cb)
{
if (priv_cb == NULL)
return;
kfree(priv_cb->request_buffer.data);
kfree(priv_cb->response_buffer.data);
kfree(priv_cb);
}
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