diff options
Diffstat (limited to 'drivers/staging/heci/io_heci.c')
| -rw-r--r-- | drivers/staging/heci/io_heci.c | 872 |
1 files changed, 0 insertions, 872 deletions
diff --git a/drivers/staging/heci/io_heci.c b/drivers/staging/heci/io_heci.c deleted file mode 100644 index 1a6faf88e16c..000000000000 --- a/drivers/staging/heci/io_heci.c +++ /dev/null @@ -1,872 +0,0 @@ -/* - * 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); -} - |