diff options
Diffstat (limited to 'drivers/staging/mei/main.c')
| -rw-r--r-- | drivers/staging/mei/main.c | 1237 |
1 files changed, 0 insertions, 1237 deletions
diff --git a/drivers/staging/mei/main.c b/drivers/staging/mei/main.c deleted file mode 100644 index 7c9321fa7bb..00000000000 --- a/drivers/staging/mei/main.c +++ /dev/null @@ -1,1237 +0,0 @@ -/* - * - * Intel Management Engine Interface (Intel MEI) Linux driver - * Copyright (c) 2003-2012, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - */ - -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/kernel.h> -#include <linux/device.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/poll.h> -#include <linux/init.h> -#include <linux/ioctl.h> -#include <linux/cdev.h> -#include <linux/sched.h> -#include <linux/uuid.h> -#include <linux/compat.h> -#include <linux/jiffies.h> -#include <linux/interrupt.h> -#include <linux/miscdevice.h> - -#include "mei_dev.h" -#include "mei.h" -#include "interface.h" - - -#define MEI_READ_TIMEOUT 45 -#define MEI_DRIVER_NAME "mei" -#define MEI_DEV_NAME "mei" - -/* - * mei driver strings - */ -static char mei_driver_name[] = MEI_DRIVER_NAME; -static const char mei_driver_string[] = "Intel(R) Management Engine Interface"; - -/* The device pointer */ -/* Currently this driver works as long as there is only a single AMT device. */ -struct pci_dev *mei_device; - -/* mei_pci_tbl - PCI Device ID Table */ -static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = { - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G965)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GM965)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GME965)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q35)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82G33)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q33)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82X38)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_3200)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_6)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_7)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_8)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_9)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_10)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_1)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_2)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_3)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_4)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_1)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_2)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_3)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_4)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_1)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_2)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_CPT_1)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PBG_1)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_1)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_2)}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_3)}, - - /* required last entry */ - {0, } -}; - -MODULE_DEVICE_TABLE(pci, mei_pci_tbl); - -static DEFINE_MUTEX(mei_mutex); - - -/** - * mei_clear_list - removes all callbacks associated with file - * from mei_cb_list - * - * @dev: device structure. - * @file: file structure - * @mei_cb_list: callbacks list - * - * mei_clear_list is called to clear resources associated with file - * when application calls close function or Ctrl-C was pressed - * - * returns true if callback removed from the list, false otherwise - */ -static bool mei_clear_list(struct mei_device *dev, - struct file *file, struct list_head *mei_cb_list) -{ - struct mei_cl_cb *cb_pos = NULL; - struct mei_cl_cb *cb_next = NULL; - struct file *file_temp; - bool removed = false; - - /* list all list member */ - list_for_each_entry_safe(cb_pos, cb_next, mei_cb_list, cb_list) { - file_temp = (struct file *)cb_pos->file_object; - /* check if list member associated with a file */ - if (file_temp == file) { - /* remove member from the list */ - list_del(&cb_pos->cb_list); - /* check if cb equal to current iamthif cb */ - if (dev->iamthif_current_cb == cb_pos) { - dev->iamthif_current_cb = NULL; - /* send flow control to iamthif client */ - mei_send_flow_control(dev, &dev->iamthif_cl); - } - /* free all allocated buffers */ - mei_free_cb_private(cb_pos); - cb_pos = NULL; - removed = true; - } - } - return removed; -} - -/** - * mei_clear_lists - removes all callbacks associated with file - * - * @dev: device structure - * @file: file structure - * - * mei_clear_lists is called to clear resources associated with file - * when application calls close function or Ctrl-C was pressed - * - * returns true if callback removed from the list, false otherwise - */ -static bool mei_clear_lists(struct mei_device *dev, struct file *file) -{ - bool removed = false; - - /* remove callbacks associated with a file */ - mei_clear_list(dev, file, &dev->amthi_cmd_list.mei_cb.cb_list); - if (mei_clear_list(dev, file, - &dev->amthi_read_complete_list.mei_cb.cb_list)) - removed = true; - - mei_clear_list(dev, file, &dev->ctrl_rd_list.mei_cb.cb_list); - - if (mei_clear_list(dev, file, &dev->ctrl_wr_list.mei_cb.cb_list)) - removed = true; - - if (mei_clear_list(dev, file, &dev->write_waiting_list.mei_cb.cb_list)) - removed = true; - - if (mei_clear_list(dev, file, &dev->write_list.mei_cb.cb_list)) - removed = true; - - /* check if iamthif_current_cb not NULL */ - if (dev->iamthif_current_cb && !removed) { - /* check file and iamthif current cb association */ - if (dev->iamthif_current_cb->file_object == file) { - /* remove cb */ - mei_free_cb_private(dev->iamthif_current_cb); - dev->iamthif_current_cb = NULL; - removed = true; - } - } - return removed; -} -/** - * find_read_list_entry - find read list entry - * - * @dev: device structure - * @file: pointer to file structure - * - * returns cb on success, NULL on error - */ -static struct mei_cl_cb *find_read_list_entry( - struct mei_device *dev, - struct mei_cl *cl) -{ - struct mei_cl_cb *pos = NULL; - struct mei_cl_cb *next = NULL; - - dev_dbg(&dev->pdev->dev, "remove read_list CB\n"); - list_for_each_entry_safe(pos, next, - &dev->read_list.mei_cb.cb_list, cb_list) { - struct mei_cl *cl_temp; - cl_temp = (struct mei_cl *)pos->file_private; - - if (mei_cl_cmp_id(cl, cl_temp)) - return pos; - } - return NULL; -} - -/** - * mei_open - the open function - * - * @inode: pointer to inode structure - * @file: pointer to file structure - * - * returns 0 on success, <0 on error - */ -static int mei_open(struct inode *inode, struct file *file) -{ - struct mei_cl *cl; - struct mei_device *dev; - unsigned long cl_id; - int err; - - err = -ENODEV; - if (!mei_device) - goto out; - - dev = pci_get_drvdata(mei_device); - if (!dev) - goto out; - - mutex_lock(&dev->device_lock); - err = -ENOMEM; - cl = mei_cl_allocate(dev); - if (!cl) - goto out_unlock; - - err = -ENODEV; - if (dev->mei_state != MEI_ENABLED) { - dev_dbg(&dev->pdev->dev, "mei_state != MEI_ENABLED mei_state= %d\n", - dev->mei_state); - goto out_unlock; - } - err = -EMFILE; - if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) - goto out_unlock; - - cl_id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX); - if (cl_id >= MEI_CLIENTS_MAX) - goto out_unlock; - - cl->host_client_id = cl_id; - - dev_dbg(&dev->pdev->dev, "client_id = %d\n", cl->host_client_id); - - dev->open_handle_count++; - - list_add_tail(&cl->link, &dev->file_list); - - set_bit(cl->host_client_id, dev->host_clients_map); - cl->state = MEI_FILE_INITIALIZING; - cl->sm_state = 0; - - file->private_data = cl; - mutex_unlock(&dev->device_lock); - - return nonseekable_open(inode, file); - -out_unlock: - mutex_unlock(&dev->device_lock); - kfree(cl); -out: - return err; -} - -/** - * mei_release - the release function - * - * @inode: pointer to inode structure - * @file: pointer to file structure - * - * returns 0 on success, <0 on error - */ -static int mei_release(struct inode *inode, struct file *file) -{ - struct mei_cl *cl = file->private_data; - struct mei_cl_cb *cb; - struct mei_device *dev; - int rets = 0; - - if (WARN_ON(!cl || !cl->dev)) - return -ENODEV; - - dev = cl->dev; - - mutex_lock(&dev->device_lock); - if (cl != &dev->iamthif_cl) { - if (cl->state == MEI_FILE_CONNECTED) { - cl->state = MEI_FILE_DISCONNECTING; - dev_dbg(&dev->pdev->dev, - "disconnecting client host client = %d, " - "ME client = %d\n", - cl->host_client_id, - cl->me_client_id); - rets = mei_disconnect_host_client(dev, cl); - } - mei_cl_flush_queues(cl); - dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n", - cl->host_client_id, - cl->me_client_id); - - if (dev->open_handle_count > 0) { - clear_bit(cl->host_client_id, dev->host_clients_map); - dev->open_handle_count--; - } - mei_remove_client_from_file_list(dev, cl->host_client_id); - - /* free read cb */ - cb = NULL; - if (cl->read_cb) { - cb = find_read_list_entry(dev, cl); - /* Remove entry from read list */ - if (cb) - list_del(&cb->cb_list); - - cb = cl->read_cb; - cl->read_cb = NULL; - } - - file->private_data = NULL; - - if (cb) { - mei_free_cb_private(cb); - cb = NULL; - } - - kfree(cl); - } else { - if (dev->open_handle_count > 0) - dev->open_handle_count--; - - if (dev->iamthif_file_object == file && - dev->iamthif_state != MEI_IAMTHIF_IDLE) { - - dev_dbg(&dev->pdev->dev, "amthi canceled iamthif state %d\n", - dev->iamthif_state); - dev->iamthif_canceled = true; - if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) { - dev_dbg(&dev->pdev->dev, "run next amthi iamthif cb\n"); - mei_run_next_iamthif_cmd(dev); - } - } - - if (mei_clear_lists(dev, file)) - dev->iamthif_state = MEI_IAMTHIF_IDLE; - - } - mutex_unlock(&dev->device_lock); - return rets; -} - - -/** - * mei_read - the read function. - * - * @file: pointer to file structure - * @ubuf: pointer to user buffer - * @length: buffer length - * @offset: data offset in buffer - * - * returns >=0 data length on success , <0 on error - */ -static ssize_t mei_read(struct file *file, char __user *ubuf, - size_t length, loff_t *offset) -{ - struct mei_cl *cl = file->private_data; - struct mei_cl_cb *cb_pos = NULL; - struct mei_cl_cb *cb = NULL; - struct mei_device *dev; - int i; - int rets; - int err; - - - if (WARN_ON(!cl || !cl->dev)) - return -ENODEV; - - dev = cl->dev; - - mutex_lock(&dev->device_lock); - if (dev->mei_state != MEI_ENABLED) { - rets = -ENODEV; - goto out; - } - - if ((cl->sm_state & MEI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) { - /* Do not allow to read watchdog client */ - i = mei_find_me_client_index(dev, mei_wd_guid); - if (i >= 0) { - struct mei_me_client *me_client = &dev->me_clients[i]; - - if (cl->me_client_id == me_client->client_id) { - rets = -EBADF; - goto out; - } - } - } else { - cl->sm_state &= ~MEI_WD_STATE_INDEPENDENCE_MSG_SENT; - } - - if (cl == &dev->iamthif_cl) { - rets = amthi_read(dev, file, ubuf, length, offset); - goto out; - } - - if (cl->read_cb && cl->read_cb->information > *offset) { - cb = cl->read_cb; - goto copy_buffer; - } else if (cl->read_cb && cl->read_cb->information > 0 && - cl->read_cb->information <= *offset) { - cb = cl->read_cb; - rets = 0; - goto free; - } else if ((!cl->read_cb || !cl->read_cb->information) && - *offset > 0) { - /*Offset needs to be cleaned for contiguous reads*/ - *offset = 0; - rets = 0; - goto out; - } - - err = mei_start_read(dev, cl); - if (err && err != -EBUSY) { - dev_dbg(&dev->pdev->dev, - "mei start read failure with status = %d\n", err); - rets = err; - goto out; - } - - if (MEI_READ_COMPLETE != cl->reading_state && - !waitqueue_active(&cl->rx_wait)) { - if (file->f_flags & O_NONBLOCK) { - rets = -EAGAIN; - goto out; - } - - mutex_unlock(&dev->device_lock); - - if (wait_event_interruptible(cl->rx_wait, - (MEI_READ_COMPLETE == cl->reading_state || - MEI_FILE_INITIALIZING == cl->state || - MEI_FILE_DISCONNECTED == cl->state || - MEI_FILE_DISCONNECTING == cl->state))) { - if (signal_pending(current)) - return -EINTR; - return -ERESTARTSYS; - } - - mutex_lock(&dev->device_lock); - if (MEI_FILE_INITIALIZING == cl->state || - MEI_FILE_DISCONNECTED == cl->state || - MEI_FILE_DISCONNECTING == cl->state) { - rets = -EBUSY; - goto out; - } - } - - cb = cl->read_cb; - - if (!cb) { - rets = -ENODEV; - goto out; - } - if (cl->reading_state != MEI_READ_COMPLETE) { - rets = 0; - goto out; - } - /* now copy the data to user space */ -copy_buffer: - dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n", - cb->response_buffer.size); - dev_dbg(&dev->pdev->dev, "cb->information - %lu\n", - cb->information); - if (length == 0 || ubuf == NULL || *offset > cb->information) { - rets = -EMSGSIZE; - goto free; - } - - /* length is being truncated to PAGE_SIZE, however, */ - /* information size may be longer */ - length = min_t(size_t, length, (cb->information - *offset)); - - if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) { - rets = -EFAULT; - goto free; - } - - rets = length; - *offset += length; - if ((unsigned long)*offset < cb->information) - goto out; - -free: - cb_pos = find_read_list_entry(dev, cl); - /* Remove entry from read list */ - if (cb_pos) - list_del(&cb_pos->cb_list); - mei_free_cb_private(cb); - cl->reading_state = MEI_IDLE; - cl->read_cb = NULL; - cl->read_pending = 0; -out: - dev_dbg(&dev->pdev->dev, "end mei read rets= %d\n", rets); - mutex_unlock(&dev->device_lock); - return rets; -} - -/** - * mei_write - the write function. - * - * @file: pointer to file structure - * @ubuf: pointer to user buffer - * @length: buffer length - * @offset: data offset in buffer - * - * returns >=0 data length on success , <0 on error - */ -static ssize_t mei_write(struct file *file, const char __user *ubuf, - size_t length, loff_t *offset) -{ - struct mei_cl *cl = file->private_data; - struct mei_cl_cb *write_cb = NULL; - struct mei_msg_hdr mei_hdr; - struct mei_device *dev; - unsigned long timeout = 0; - int rets; - int i; - - if (WARN_ON(!cl || !cl->dev)) - return -ENODEV; - - dev = cl->dev; - - mutex_lock(&dev->device_lock); - - if (dev->mei_state != MEI_ENABLED) { - mutex_unlock(&dev->device_lock); - return -ENODEV; - } - - if (cl == &dev->iamthif_cl) { - write_cb = find_amthi_read_list_entry(dev, file); - - if (write_cb) { - timeout = write_cb->read_time + - msecs_to_jiffies(IAMTHIF_READ_TIMER); - - if (time_after(jiffies, timeout) || - cl->reading_state == MEI_READ_COMPLETE) { - *offset = 0; - list_del(&write_cb->cb_list); - mei_free_cb_private(write_cb); - write_cb = NULL; - } - } - } - - /* free entry used in read */ - if (cl->reading_state == MEI_READ_COMPLETE) { - *offset = 0; - write_cb = find_read_list_entry(dev, cl); - if (write_cb) { - list_del(&write_cb->cb_list); - mei_free_cb_private(write_cb); - write_cb = NULL; - cl->reading_state = MEI_IDLE; - cl->read_cb = NULL; - cl->read_pending = 0; - } - } else if (cl->reading_state == MEI_IDLE && !cl->read_pending) - *offset = 0; - - - write_cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL); - if (!write_cb) { - mutex_unlock(&dev->device_lock); - return -ENOMEM; - } - - write_cb->file_object = file; - write_cb->file_private = cl; - write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL); - rets = -ENOMEM; - if (!write_cb->request_buffer.data) - goto unlock_dev; - - dev_dbg(&dev->pdev->dev, "length =%d\n", (int) length); - - rets = -EFAULT; - if (copy_from_user(write_cb->request_buffer.data, ubuf, length)) - goto unlock_dev; - - cl->sm_state = 0; - if (length == 4 && - ((memcmp(mei_wd_state_independence_msg[0], - write_cb->request_buffer.data, 4) == 0) || - (memcmp(mei_wd_state_independence_msg[1], - write_cb->request_buffer.data, 4) == 0) || - (memcmp(mei_wd_state_independence_msg[2], - write_cb->request_buffer.data, 4) == 0))) - cl->sm_state |= MEI_WD_STATE_INDEPENDENCE_MSG_SENT; - - INIT_LIST_HEAD(&write_cb->cb_list); - if (cl == &dev->iamthif_cl) { - write_cb->response_buffer.data = - kmalloc(dev->iamthif_mtu, GFP_KERNEL); - if (!write_cb->response_buffer.data) { - rets = -ENOMEM; - goto unlock_dev; - } - if (dev->mei_state != MEI_ENABLED) { - rets = -ENODEV; - goto unlock_dev; - } - for (i = 0; i < dev->me_clients_num; i++) { - if (dev->me_clients[i].client_id == - dev->iamthif_cl.me_client_id) - break; - } - - if (WARN_ON(dev->me_clients[i].client_id != cl->me_client_id)) { - rets = -ENODEV; - goto unlock_dev; - } - if (i == dev->me_clients_num || - (dev->me_clients[i].client_id != - dev->iamthif_cl.me_client_id)) { - rets = -ENODEV; - goto unlock_dev; - } else if (length > dev->me_clients[i].props.max_msg_length || - length <= 0) { - rets = -EMSGSIZE; - goto unlock_dev; - } - - write_cb->response_buffer.size = dev->iamthif_mtu; - write_cb->major_file_operations = MEI_IOCTL; - write_cb->information = 0; - write_cb->request_buffer.size = length; - if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) { - rets = -ENODEV; - goto unlock_dev; - } - - if (!list_empty(&dev->amthi_cmd_list.mei_cb.cb_list) || - dev->iamthif_state != MEI_IAMTHIF_IDLE) { - dev_dbg(&dev->pdev->dev, "amthi_state = %d\n", - (int) dev->iamthif_state); - dev_dbg(&dev->pdev->dev, "add amthi cb to amthi cmd waiting list\n"); - list_add_tail(&write_cb->cb_list, - &dev->amthi_cmd_list.mei_cb.cb_list); - rets = length; - } else { - dev_dbg(&dev->pdev->dev, "call amthi write\n"); - rets = amthi_write(dev, write_cb); - - if (rets) { - dev_dbg(&dev->pdev->dev, "amthi write failed with status = %d\n", - rets); - goto unlock_dev; - } - rets = length; - } - mutex_unlock(&dev->device_lock); - return rets; - } - - write_cb->major_file_operations = MEI_WRITE; - /* make sure information is zero before we start */ - - write_cb->information = 0; - write_cb->request_buffer.size = length; - - dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n", - cl->host_client_id, cl->me_client_id); - if (cl->state != MEI_FILE_CONNECTED) { - rets = -ENODEV; - dev_dbg(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d", - cl->host_client_id, - cl->me_client_id); - goto unlock_dev; - } - for (i = 0; i < dev->me_clients_num; i++) { - if (dev->me_clients[i].client_id == - cl->me_client_id) - break; - } - if (WARN_ON(dev->me_clients[i].client_id != cl->me_client_id)) { - rets = -ENODEV; - goto unlock_dev; - } - if (i == dev->me_clients_num) { - rets = -ENODEV; - goto unlock_dev; - } - if (length > dev->me_clients[i].props.max_msg_length || length <= 0) { - rets = -EINVAL; - goto unlock_dev; - } - write_cb->file_private = cl; - - rets = mei_flow_ctrl_creds(dev, cl); - if (rets < 0) - goto unlock_dev; - - if (rets && dev->mei_host_buffer_is_empty) { - rets = 0; - dev->mei_host_buffer_is_empty = false; - if (length > ((((dev->host_hw_state & H_CBD) >> 24) * - sizeof(u32)) - sizeof(struct mei_msg_hdr))) { - - mei_hdr.length = - (((dev->host_hw_state & H_CBD) >> 24) * - sizeof(u32)) - - sizeof(struct mei_msg_hdr); - mei_hdr.msg_complete = 0; - } else { - mei_hdr.length = length; - mei_hdr.msg_complete = 1; - } - mei_hdr.host_addr = cl->host_client_id; - mei_hdr.me_addr = cl->me_client_id; - mei_hdr.reserved = 0; - dev_dbg(&dev->pdev->dev, "call mei_write_message header=%08x.\n", - *((u32 *) &mei_hdr)); - if (mei_write_message(dev, &mei_hdr, - (unsigned char *) (write_cb->request_buffer.data), - mei_hdr.length)) { - rets = -ENODEV; - goto unlock_dev; - } - cl->writing_state = MEI_WRITING; - write_cb->information = mei_hdr.length; - if (mei_hdr.msg_complete) { - if (mei_flow_ctrl_reduce(dev, cl)) { - rets = -ENODEV; - goto unlock_dev; - } - list_add_tail(&write_cb->cb_list, - &dev->write_waiting_list.mei_cb.cb_list); - } else { - list_add_tail(&write_cb->cb_list, - &dev->write_list.mei_cb.cb_list); - } - - } else { - - write_cb->information = 0; - cl->writing_state = MEI_WRITING; - list_add_tail(&write_cb->cb_list, - &dev->write_list.mei_cb.cb_list); - } - mutex_unlock(&dev->device_lock); - return length; - -unlock_dev: - mutex_unlock(&dev->device_lock); - mei_free_cb_private(write_cb); - return rets; -} - - -/** - * mei_ioctl - the IOCTL function - * - * @file: pointer to file structure - * @cmd: ioctl command - * @data: pointer to mei message structure - * - * returns 0 on success , <0 on error - */ -static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) -{ - struct mei_device *dev; - struct mei_cl *cl = file->private_data; - struct mei_connect_client_data *connect_data = NULL; - int rets; - - if (cmd != IOCTL_MEI_CONNECT_CLIENT) - return -EINVAL; - - if (WARN_ON(!cl || !cl->dev)) - return -ENODEV; - - dev = cl->dev; - - dev_dbg(&dev->pdev->dev, "IOCTL cmd = 0x%x", cmd); - - mutex_lock(&dev->device_lock); - if (dev->mei_state != MEI_ENABLED) { - rets = -ENODEV; - goto out; - } - - dev_dbg(&dev->pdev->dev, ": IOCTL_MEI_CONNECT_CLIENT.\n"); - - connect_data = kzalloc(sizeof(struct mei_connect_client_data), - GFP_KERNEL); - if (!connect_data) { - rets = -ENOMEM; - goto out; - } - dev_dbg(&dev->pdev->dev, "copy connect data from user\n"); - if (copy_from_user(connect_data, (char __user *)data, - sizeof(struct mei_connect_client_data))) { - dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n"); - rets = -EFAULT; - goto out; - } - rets = mei_ioctl_connect_client(file, connect_data); - - /* if all is ok, copying the data back to user. */ - if (rets) - goto out; - - dev_dbg(&dev->pdev->dev, "copy connect data to user\n"); - if (copy_to_user((char __user *)data, connect_data, - sizeof(struct mei_connect_client_data))) { - dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n"); - rets = -EFAULT; - goto out; - } - -out: - kfree(connect_data); - mutex_unlock(&dev->device_lock); - return rets; -} - -/** - * mei_compat_ioctl - the compat IOCTL function - * - * @file: pointer to file structure - * @cmd: ioctl command - * @data: pointer to mei message structure - * - * returns 0 on success , <0 on error - */ -#ifdef CONFIG_COMPAT -static long mei_compat_ioctl(struct file *file, - unsigned int cmd, unsigned long data) -{ - return mei_ioctl(file, cmd, (unsigned long)compat_ptr(data)); -} -#endif - - -/** - * mei_poll - the poll function - * - * @file: pointer to file structure - * @wait: pointer to poll_table structure - * - * returns poll mask - */ -static unsigned int mei_poll(struct file *file, poll_table *wait) -{ - struct mei_cl *cl = file->private_data; - struct mei_device *dev; - unsigned int mask = 0; - - if (WARN_ON(!cl || !cl->dev)) - return mask; - - dev = cl->dev; - - mutex_lock(&dev->device_lock); - - if (dev->mei_state != MEI_ENABLED) - goto out; - - - if (cl == &dev->iamthif_cl) { - mutex_unlock(&dev->device_lock); - poll_wait(file, &dev->iamthif_cl.wait, wait); - mutex_lock(&dev->device_lock); - if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE && - dev->iamthif_file_object == file) { - mask |= (POLLIN | POLLRDNORM); - dev_dbg(&dev->pdev->dev, "run next amthi cb\n"); - mei_run_next_iamthif_cmd(dev); - } - goto out; - } - - mutex_unlock(&dev->device_lock); - poll_wait(file, &cl->tx_wait, wait); - mutex_lock(&dev->device_lock); - if (MEI_WRITE_COMPLETE == cl->writing_state) - mask |= (POLLIN | POLLRDNORM); - -out: - mutex_unlock(&dev->device_lock); - return mask; -} - -/* - * file operations structure will be used for mei char device. - */ -static const struct file_operations mei_fops = { - .owner = THIS_MODULE, - .read = mei_read, - .unlocked_ioctl = mei_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = mei_compat_ioctl, -#endif - .open = mei_open, - .release = mei_release, - .write = mei_write, - .poll = mei_poll, - .llseek = no_llseek -}; - - -/* - * Misc Device Struct - */ -static struct miscdevice mei_misc_device = { - .name = MEI_DRIVER_NAME, - .fops = &mei_fops, - .minor = MISC_DYNAMIC_MINOR, -}; - -/** - * mei_probe - Device Initialization Routine - * - * @pdev: PCI device structure - * @ent: entry in kcs_pci_tbl - * - * returns 0 on success, <0 on failure. - */ -static int __devinit mei_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - struct mei_device *dev; - int err; - - mutex_lock(&mei_mutex); - if (mei_device) { - err = -EEXIST; - goto end; - } - /* enable pci dev */ - err = pci_enable_device(pdev); - if (err) { - printk(KERN_ERR "mei: Failed to enable pci device.\n"); - goto end; - } - /* set PCI host mastering */ - pci_set_master(pdev); - /* pci request regions for mei driver */ - err = pci_request_regions(pdev, mei_driver_name); - if (err) { - printk(KERN_ERR "mei: Failed to get pci regions.\n"); - goto disable_device; - } - /* allocates and initializes the mei dev structure */ - dev = mei_device_init(pdev); - if (!dev) { - err = -ENOMEM; - goto release_regions; - } - /* mapping IO device memory */ - dev->mem_addr = pci_iomap(pdev, 0, 0); - if (!dev->mem_addr) { - printk(KERN_ERR "mei: mapping I/O device memory failure.\n"); - err = -ENOMEM; - goto free_device; - } - pci_enable_msi(pdev); - - /* request and enable interrupt */ - if (pci_dev_msi_enabled(pdev)) - err = request_threaded_irq(pdev->irq, - NULL, - mei_interrupt_thread_handler, - 0, mei_driver_name, dev); - else - err = request_threaded_irq(pdev->irq, - mei_interrupt_quick_handler, - mei_interrupt_thread_handler, - IRQF_SHARED, mei_driver_name, dev); - - if (err) { - printk(KERN_ERR "mei: request_threaded_irq failure. irq = %d\n", - pdev->irq); - goto unmap_memory; - } - INIT_DELAYED_WORK(&dev->timer_work, mei_timer); - if (mei_hw_init(dev)) { - printk(KERN_ERR "mei: Init hw failure.\n"); - err = -ENODEV; - goto release_irq; - } - - err = misc_register(&mei_misc_device); - if (err) - goto release_irq; - - mei_device = pdev; - pci_set_drvdata(pdev, dev); - - - schedule_delayed_work(&dev->timer_work, HZ); - - mutex_unlock(&mei_mutex); - - pr_debug("mei: Driver initialization successful.\n"); - - return 0; - -release_irq: - /* disable interrupts */ - dev->host_hw_state = mei_hcsr_read(dev); - mei_disable_interrupts(dev); - flush_scheduled_work(); - free_irq(pdev->irq, dev); - pci_disable_msi(pdev); -unmap_memory: - pci_iounmap(pdev, dev->mem_addr); -free_device: - kfree(dev); -release_regions: - pci_release_regions(pdev); -disable_device: - pci_disable_device(pdev); -end: - mutex_unlock(&mei_mutex); - printk(KERN_ERR "mei: Driver initialization failed.\n"); - return err; -} - -/** - * mei_remove - Device Removal Routine - * - * @pdev: PCI device structure - * - * mei_remove is called by the PCI subsystem to alert the driver - * that it should release a PCI device. - */ -static void __devexit mei_remove(struct pci_dev *pdev) -{ - struct mei_device *dev; - - if (mei_device != pdev) - return; - - dev = pci_get_drvdata(pdev); - if (!dev) - return; - - mutex_lock(&dev->device_lock); - - mei_wd_stop(dev, false); - - mei_device = NULL; - - if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) { - dev->iamthif_cl.state = MEI_FILE_DISCONNECTING; - mei_disconnect_host_client(dev, &dev->iamthif_cl); - } - if (dev->wd_cl.state == MEI_FILE_CONNECTED) { - dev->wd_cl.state = MEI_FILE_DISCONNECTING; - mei_disconnect_host_client(dev, &dev->wd_cl); - } - - /* Unregistering watchdog device */ - mei_watchdog_unregister(dev); - - /* remove entry if already in list */ - dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n"); - mei_remove_client_from_file_list(dev, dev->wd_cl.host_client_id); - mei_remove_client_from_file_list(dev, dev->iamthif_cl.host_client_id); - - dev->iamthif_current_cb = NULL; - dev->me_clients_num = 0; - - mutex_unlock(&dev->device_lock); - - flush_scheduled_work(); - - /* disable interrupts */ - mei_disable_interrupts(dev); - - free_irq(pdev->irq, dev); - pci_disable_msi(pdev); - pci_set_drvdata(pdev, NULL); - - if (dev->mem_addr) - pci_iounmap(pdev, dev->mem_addr); - - kfree(dev); - - pci_release_regions(pdev); - pci_disable_device(pdev); -} -#ifdef CONFIG_PM -static int mei_pci_suspend(struct device *device) -{ - struct pci_dev *pdev = to_pci_dev(device); - struct mei_device *dev = pci_get_drvdata(pdev); - int err; - - if (!dev) - return -ENODEV; - mutex_lock(&dev->device_lock); - /* Stop watchdog if exists */ - err = mei_wd_stop(dev, true); - /* Set new mei state */ - if (dev->mei_state == MEI_ENABLED || - dev->mei_state == MEI_RECOVERING_FROM_RESET) { - dev->mei_state = MEI_POWER_DOWN; - mei_reset(dev, 0); - } - mutex_unlock(&dev->device_lock); - - free_irq(pdev->irq, dev); - pci_disable_msi(pdev); - - return err; -} - -static int mei_pci_resume(struct device *device) -{ - struct pci_dev *pdev = to_pci_dev(device); - struct mei_device *dev; - int err; - - dev = pci_get_drvdata(pdev); - if (!dev) - return -ENODEV; - - pci_enable_msi(pdev); - - /* request and enable interrupt */ - if (pci_dev_msi_enabled(pdev)) - err = request_threaded_irq(pdev->irq, - NULL, - mei_interrupt_thread_handler, - 0, mei_driver_name, dev); - else - err = request_threaded_irq(pdev->irq, - mei_interrupt_quick_handler, - mei_interrupt_thread_handler, - IRQF_SHARED, mei_driver_name, dev); - - if (err) { - printk(KERN_ERR "mei: Request_irq failure. irq = %d\n", - pdev->irq); - return err; - } - - mutex_lock(&dev->device_lock); - dev->mei_state = MEI_POWER_UP; - mei_reset(dev, 1); - mutex_unlock(&dev->device_lock); - - /* Start timer if stopped in suspend */ - schedule_delayed_work(&dev->timer_work, HZ); - - return err; -} -static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume); -#define MEI_PM_OPS (&mei_pm_ops) -#else -#define MEI_PM_OPS NULL -#endif /* CONFIG_PM */ -/* - * PCI driver structure - */ -static struct pci_driver mei_driver = { - .name = mei_driver_name, - .id_table = mei_pci_tbl, - .probe = mei_probe, - .remove = __devexit_p(mei_remove), - .shutdown = __devexit_p(mei_remove), - .driver.pm = MEI_PM_OPS, -}; - -/** - * mei_init_module - Driver Registration Routine - * - * mei_init_module is the first routine called when the driver is - * loaded. All it does is to register with the PCI subsystem. - * - * returns 0 on success, <0 on failure. - */ -static int __init mei_init_module(void) -{ - int ret; - - pr_debug("mei: %s\n", mei_driver_string); - /* init pci module */ - ret = pci_register_driver(&mei_driver); - if (ret < 0) - printk(KERN_ERR "mei: Error registering driver.\n"); - - return ret; -} - -module_init(mei_init_module); - -/** - * mei_exit_module - Driver Exit Cleanup Routine - * - * mei_exit_module is called just before the driver is removed - * from memory. - */ -static void __exit mei_exit_module(void) -{ - misc_deregister(&mei_misc_device); - pci_unregister_driver(&mei_driver); - - pr_debug("mei: Driver unloaded successfully.\n"); -} - -module_exit(mei_exit_module); - - -MODULE_AUTHOR("Intel Corporation"); -MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); -MODULE_LICENSE("GPL v2"); |