forked from Minki/linux
staging/mei: MEI driver init flow.
Init driver list and queue, MEI Hardware reset flow, init of driver specific host client. MEI Init/reset flow: - Ack all waiting interrupts - Hardware reset flow (Set Reset Bit, Generate Interrupt, Clear Reset Bit Generate Interrupt) - Wait for ME Ready Bit (done in interrupt thread) - Set ME Ready Bit (done in interrupt thread) - Send Start request (done in interrupt thread) - wait for answer - Send Enumerate Clients request (done in interrupt thread) - wait for answer - Send Get Client property for each client request (done in interrupt thread) - Wait for answers - Init Done. MEI Driver connect internally to 2 ME clients/features: AMTHI and AMT watchdog. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Itzhak Tzeel-Krupp <itzhak.tzeel-krupp@intel.com> Signed-off-by: Oren Weil <oren.jer.weil@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oren Weil
Greg Kroah-Hartman
parent
3ce72726c6
commit
91f01c6d45
770
drivers/staging/mei/init.c
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770
drivers/staging/mei/init.c
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@ -0,0 +1,770 @@
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/*
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*
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* Intel Management Engine Interface (Intel MEI) Linux driver
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* Copyright (c) 2003-2011, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <linux/pci.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/delay.h>
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#include "mei_dev.h"
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#include "hw.h"
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#include "interface.h"
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#include "mei.h"
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const uuid_le mei_amthi_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, 0xac,
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0xa8, 0x46, 0xe0, 0xff, 0x65,
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0x81, 0x4c);
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/**
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* mei_initialize_list - Sets up a queue list.
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*
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* @list: An instance of our list structure
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* @dev: the device structure
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*/
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void mei_initialize_list(struct mei_io_list *list, struct mei_device *dev)
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{
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/* initialize our queue list */
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INIT_LIST_HEAD(&list->mei_cb.cb_list);
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list->status = 0;
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list->device_extension = dev;
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}
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/**
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* mei_flush_queues - flushes queue lists belonging to cl.
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*
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* @dev: the device structure
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* @cl: private data of the file object
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*/
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void mei_flush_queues(struct mei_device *dev, struct mei_cl *cl)
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{
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int i;
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if (!dev || !cl)
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return;
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for (i = 0; i < MEI_IO_LISTS_NUMBER; i++) {
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dev_dbg(&dev->pdev->dev, "remove list entry belonging to cl\n");
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mei_flush_list(dev->io_list_array[i], cl);
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}
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}
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/**
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* mei_flush_list - removes list entry belonging to cl.
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*
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* @list: An instance of our list structure
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* @cl: private data of the file object
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*/
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void mei_flush_list(struct mei_io_list *list, struct mei_cl *cl)
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{
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struct mei_cl *cl_tmp;
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struct mei_cl_cb *cb_pos = NULL;
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struct mei_cl_cb *cb_next = NULL;
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if (!list || !cl)
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return;
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if (list->status != 0)
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return;
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if (list_empty(&list->mei_cb.cb_list))
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return;
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list_for_each_entry_safe(cb_pos, cb_next,
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&list->mei_cb.cb_list, cb_list) {
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if (cb_pos) {
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cl_tmp = (struct mei_cl *)
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cb_pos->file_private;
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if (cl_tmp &&
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mei_fe_same_id(cl, cl_tmp))
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list_del(&cb_pos->cb_list);
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}
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}
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}
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/**
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* mei_reset_iamthif_params - initializes mei device iamthif
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*
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* @dev: the device structure
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*/
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static void mei_reset_iamthif_params(struct mei_device *dev)
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{
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/* reset iamthif parameters. */
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dev->iamthif_current_cb = NULL;
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dev->iamthif_msg_buf_size = 0;
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dev->iamthif_msg_buf_index = 0;
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dev->iamthif_canceled = 0;
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dev->iamthif_ioctl = 0;
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dev->iamthif_state = MEI_IAMTHIF_IDLE;
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dev->iamthif_timer = 0;
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}
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/**
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* init_mei_device - allocates and initializes the mei device structure
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*
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* @pdev: The pci device structure
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*
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* returns The mei_device_device pointer on success, NULL on failure.
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*/
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struct mei_device *init_mei_device(struct pci_dev *pdev)
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{
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int i;
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struct mei_device *dev;
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dev = kzalloc(sizeof(struct mei_device), GFP_KERNEL);
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if (!dev)
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return NULL;
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/* setup our list array */
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dev->io_list_array[0] = &dev->read_list;
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dev->io_list_array[1] = &dev->write_list;
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dev->io_list_array[2] = &dev->write_waiting_list;
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dev->io_list_array[3] = &dev->ctrl_wr_list;
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dev->io_list_array[4] = &dev->ctrl_rd_list;
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dev->io_list_array[5] = &dev->amthi_cmd_list;
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dev->io_list_array[6] = &dev->amthi_read_complete_list;
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INIT_LIST_HEAD(&dev->file_list);
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INIT_LIST_HEAD(&dev->wd_cl.link);
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INIT_LIST_HEAD(&dev->iamthif_cl.link);
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mutex_init(&dev->device_lock);
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init_waitqueue_head(&dev->wait_recvd_msg);
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init_waitqueue_head(&dev->wait_stop_wd);
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dev->mei_state = MEI_INITIALIZING;
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dev->iamthif_state = MEI_IAMTHIF_IDLE;
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for (i = 0; i < MEI_IO_LISTS_NUMBER; i++)
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mei_initialize_list(dev->io_list_array[i], dev);
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dev->pdev = pdev;
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return dev;
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}
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/**
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* mei_hw_init - initializes host and fw to start work.
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*
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* @dev: the device structure
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*
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* returns 0 on success, <0 on failure.
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*/
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int mei_hw_init(struct mei_device *dev)
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{
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int err = 0;
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int ret;
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mutex_lock(&dev->device_lock);
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dev->host_hw_state = mei_hcsr_read(dev);
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dev->me_hw_state = mei_mecsr_read(dev);
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dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, mestate = 0x%08x.\n",
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dev->host_hw_state, dev->me_hw_state);
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/* acknowledge interrupt and stop interupts */
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if ((dev->host_hw_state & H_IS) == H_IS)
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mei_reg_write(dev, H_CSR, dev->host_hw_state);
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dev->recvd_msg = 0;
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dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n");
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mei_reset(dev, 1);
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dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
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dev->host_hw_state, dev->me_hw_state);
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/* wait for ME to turn on ME_RDY */
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if (!dev->recvd_msg) {
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mutex_unlock(&dev->device_lock);
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err = wait_event_interruptible_timeout(dev->wait_recvd_msg,
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dev->recvd_msg, MEI_INTEROP_TIMEOUT);
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mutex_lock(&dev->device_lock);
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}
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if (!err && !dev->recvd_msg) {
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dev->mei_state = MEI_DISABLED;
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dev_dbg(&dev->pdev->dev,
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"wait_event_interruptible_timeout failed"
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"on wait for ME to turn on ME_RDY.\n");
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ret = -ENODEV;
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goto out;
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}
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if (!(((dev->host_hw_state & H_RDY) == H_RDY) &&
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((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
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dev->mei_state = MEI_DISABLED;
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dev_dbg(&dev->pdev->dev,
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"host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
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dev->host_hw_state, dev->me_hw_state);
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if (!(dev->host_hw_state & H_RDY) != H_RDY)
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dev_dbg(&dev->pdev->dev, "host turn off H_RDY.\n");
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if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
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dev_dbg(&dev->pdev->dev, "ME turn off ME_RDY.\n");
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printk(KERN_ERR "mei: link layer initialization failed.\n");
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ret = -ENODEV;
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goto out;
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}
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if (dev->version.major_version != HBM_MAJOR_VERSION ||
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dev->version.minor_version != HBM_MINOR_VERSION) {
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dev_dbg(&dev->pdev->dev, "MEI start failed.\n");
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ret = -ENODEV;
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goto out;
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}
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dev->recvd_msg = 0;
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dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
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dev->host_hw_state, dev->me_hw_state);
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dev_dbg(&dev->pdev->dev, "ME turn on ME_RDY and host turn on H_RDY.\n");
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dev_dbg(&dev->pdev->dev, "link layer has been established.\n");
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dev_dbg(&dev->pdev->dev, "MEI start success.\n");
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ret = 0;
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out:
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mutex_unlock(&dev->device_lock);
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return ret;
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}
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/**
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* mei_hw_reset - resets fw via mei csr register.
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*
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* @dev: the device structure
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* @interrupts_enabled: if interrupt should be enabled after reset.
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*/
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static void mei_hw_reset(struct mei_device *dev, int interrupts_enabled)
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{
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dev->host_hw_state |= (H_RST | H_IG);
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if (interrupts_enabled)
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mei_enable_interrupts(dev);
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else
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mei_disable_interrupts(dev);
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}
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/**
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* mei_reset - resets host and fw.
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*
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* @dev: the device structure
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* @interrupts_enabled: if interrupt should be enabled after reset.
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*/
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void mei_reset(struct mei_device *dev, int interrupts_enabled)
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{
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struct mei_cl *cl_pos = NULL;
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struct mei_cl *cl_next = NULL;
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struct mei_cl_cb *cb_pos = NULL;
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struct mei_cl_cb *cb_next = NULL;
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bool unexpected;
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if (dev->mei_state == MEI_RECOVERING_FROM_RESET) {
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dev->need_reset = 1;
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return;
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}
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unexpected = (dev->mei_state != MEI_INITIALIZING &&
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dev->mei_state != MEI_DISABLED &&
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dev->mei_state != MEI_POWER_DOWN &&
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dev->mei_state != MEI_POWER_UP);
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dev->host_hw_state = mei_hcsr_read(dev);
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dev_dbg(&dev->pdev->dev, "before reset host_hw_state = 0x%08x.\n",
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dev->host_hw_state);
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mei_hw_reset(dev, interrupts_enabled);
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dev->host_hw_state &= ~H_RST;
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dev->host_hw_state |= H_IG;
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mei_hcsr_set(dev);
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dev_dbg(&dev->pdev->dev, "currently saved host_hw_state = 0x%08x.\n",
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dev->host_hw_state);
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dev->need_reset = 0;
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if (dev->mei_state != MEI_INITIALIZING) {
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if (dev->mei_state != MEI_DISABLED &&
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dev->mei_state != MEI_POWER_DOWN)
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dev->mei_state = MEI_RESETING;
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list_for_each_entry_safe(cl_pos,
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cl_next, &dev->file_list, link) {
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cl_pos->state = MEI_FILE_DISCONNECTED;
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cl_pos->mei_flow_ctrl_creds = 0;
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cl_pos->read_cb = NULL;
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cl_pos->timer_count = 0;
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}
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/* remove entry if already in list */
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dev_dbg(&dev->pdev->dev, "list del iamthif and wd file list.\n");
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mei_remove_client_from_file_list(dev,
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dev->wd_cl.host_client_id);
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mei_remove_client_from_file_list(dev,
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dev->iamthif_cl.host_client_id);
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mei_reset_iamthif_params(dev);
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dev->wd_due_counter = 0;
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dev->extra_write_index = 0;
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}
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dev->num_mei_me_clients = 0;
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dev->rd_msg_hdr = 0;
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dev->stop = 0;
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dev->wd_pending = 0;
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/* update the state of the registers after reset */
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dev->host_hw_state = mei_hcsr_read(dev);
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dev->me_hw_state = mei_mecsr_read(dev);
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dev_dbg(&dev->pdev->dev, "after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
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dev->host_hw_state, dev->me_hw_state);
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if (unexpected)
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dev_warn(&dev->pdev->dev, "unexpected reset.\n");
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/* Wake up all readings so they can be interrupted */
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list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
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if (waitqueue_active(&cl_pos->rx_wait)) {
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dev_dbg(&dev->pdev->dev, "Waking up client!\n");
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wake_up_interruptible(&cl_pos->rx_wait);
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}
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}
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/* remove all waiting requests */
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if (dev->write_list.status == 0 &&
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!list_empty(&dev->write_list.mei_cb.cb_list)) {
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list_for_each_entry_safe(cb_pos, cb_next,
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&dev->write_list.mei_cb.cb_list, cb_list) {
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if (cb_pos) {
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list_del(&cb_pos->cb_list);
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mei_free_cb_private(cb_pos);
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cb_pos = NULL;
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}
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}
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}
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}
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/**
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* host_start_message - mei host sends start message.
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*
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* @dev: the device structure
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*
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* returns none.
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*/
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void host_start_message(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr;
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struct hbm_host_version_request *host_start_req;
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/* host start message */
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mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
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mei_hdr->host_addr = 0;
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mei_hdr->me_addr = 0;
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mei_hdr->length = sizeof(struct hbm_host_version_request);
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mei_hdr->msg_complete = 1;
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mei_hdr->reserved = 0;
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host_start_req =
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(struct hbm_host_version_request *) &dev->wr_msg_buf[1];
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memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
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host_start_req->cmd.cmd = HOST_START_REQ_CMD;
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host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
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host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
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dev->recvd_msg = 0;
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if (!mei_write_message(dev, mei_hdr,
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(unsigned char *) (host_start_req),
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mei_hdr->length)) {
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dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n");
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dev->mei_state = MEI_RESETING;
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mei_reset(dev, 1);
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}
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dev->init_clients_state = MEI_START_MESSAGE;
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dev->init_clients_timer = INIT_CLIENTS_TIMEOUT;
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return ;
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}
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/**
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* host_enum_clients_message - host sends enumeration client request message.
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*
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* @dev: the device structure
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*
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* returns none.
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*/
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void host_enum_clients_message(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr;
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struct hbm_host_enum_request *host_enum_req;
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mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
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/* enumerate clients */
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mei_hdr->host_addr = 0;
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mei_hdr->me_addr = 0;
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mei_hdr->length = sizeof(struct hbm_host_enum_request);
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mei_hdr->msg_complete = 1;
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mei_hdr->reserved = 0;
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host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
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memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
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host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
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if (!mei_write_message(dev, mei_hdr,
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(unsigned char *) (host_enum_req),
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mei_hdr->length)) {
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dev->mei_state = MEI_RESETING;
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dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
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mei_reset(dev, 1);
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}
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dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE;
|
||||
dev->init_clients_timer = INIT_CLIENTS_TIMEOUT;
|
||||
return ;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* allocate_me_clients_storage - allocates storage for me clients
|
||||
*
|
||||
* @dev: the device structure
|
||||
*
|
||||
* returns none.
|
||||
*/
|
||||
void allocate_me_clients_storage(struct mei_device *dev)
|
||||
{
|
||||
struct mei_me_client *clients;
|
||||
int b;
|
||||
|
||||
/* count how many ME clients we have */
|
||||
for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX)
|
||||
dev->num_mei_me_clients++;
|
||||
|
||||
if (dev->num_mei_me_clients <= 0)
|
||||
return ;
|
||||
|
||||
|
||||
if (dev->me_clients != NULL) {
|
||||
kfree(dev->me_clients);
|
||||
dev->me_clients = NULL;
|
||||
}
|
||||
dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%zd.\n",
|
||||
dev->num_mei_me_clients * sizeof(struct mei_me_client));
|
||||
/* allocate storage for ME clients representation */
|
||||
clients = kcalloc(dev->num_mei_me_clients,
|
||||
sizeof(struct mei_me_client), GFP_KERNEL);
|
||||
if (!clients) {
|
||||
dev_dbg(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
|
||||
dev->mei_state = MEI_RESETING;
|
||||
mei_reset(dev, 1);
|
||||
return ;
|
||||
}
|
||||
dev->me_clients = clients;
|
||||
return ;
|
||||
}
|
||||
/**
|
||||
* host_client_properties - reads properties for client
|
||||
*
|
||||
* @dev: the device structure
|
||||
*
|
||||
* returns none.
|
||||
*/
|
||||
void host_client_properties(struct mei_device *dev)
|
||||
{
|
||||
struct mei_msg_hdr *mei_header;
|
||||
struct hbm_props_request *host_cli_req;
|
||||
int b;
|
||||
u8 client_num = dev->me_client_presentation_num;
|
||||
|
||||
b = dev->me_client_index;
|
||||
b = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, b);
|
||||
if (b < MEI_CLIENTS_MAX) {
|
||||
dev->me_clients[client_num].client_id = b;
|
||||
dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
|
||||
mei_header = (struct mei_msg_hdr *)&dev->wr_msg_buf[0];
|
||||
mei_header->host_addr = 0;
|
||||
mei_header->me_addr = 0;
|
||||
mei_header->length = sizeof(struct hbm_props_request);
|
||||
mei_header->msg_complete = 1;
|
||||
mei_header->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_PROPERTIES_REQ_CMD;
|
||||
host_cli_req->address = b;
|
||||
|
||||
if (!mei_write_message(dev, mei_header,
|
||||
(unsigned char *)host_cli_req,
|
||||
mei_header->length)) {
|
||||
dev->mei_state = MEI_RESETING;
|
||||
dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
|
||||
mei_reset(dev, 1);
|
||||
return;
|
||||
}
|
||||
|
||||
dev->init_clients_timer = INIT_CLIENTS_TIMEOUT;
|
||||
dev->me_client_index = b;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Clear Map for indicating now ME clients
|
||||
* with associated host client
|
||||
*/
|
||||
bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
|
||||
dev->write_hang = -1;
|
||||
dev->open_handle_count = 0;
|
||||
bitmap_set(dev->host_clients_map, 0, 3);
|
||||
dev->mei_state = MEI_ENABLED;
|
||||
|
||||
mei_wd_host_init(dev);
|
||||
return;
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_init_file_private - initializes private file structure.
|
||||
*
|
||||
* @priv: private file structure to be initialized
|
||||
* @file: the file structure
|
||||
*/
|
||||
void mei_init_file_private(struct mei_cl *priv, struct mei_device *dev)
|
||||
{
|
||||
memset(priv, 0, sizeof(struct mei_cl));
|
||||
init_waitqueue_head(&priv->wait);
|
||||
init_waitqueue_head(&priv->rx_wait);
|
||||
init_waitqueue_head(&priv->tx_wait);
|
||||
INIT_LIST_HEAD(&priv->link);
|
||||
priv->reading_state = MEI_IDLE;
|
||||
priv->writing_state = MEI_IDLE;
|
||||
priv->dev = dev;
|
||||
}
|
||||
|
||||
int mei_find_me_client_index(const struct mei_device *dev, uuid_le cuuid)
|
||||
{
|
||||
int i, res = -1;
|
||||
|
||||
for (i = 0; i < dev->num_mei_me_clients; ++i)
|
||||
if (uuid_le_cmp(cuuid,
|
||||
dev->me_clients[i].props.protocol_name) == 0) {
|
||||
res = i;
|
||||
break;
|
||||
}
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* mei_find_me_client_update_filext - searches for ME client guid
|
||||
* sets client_id in mei_file_private if found
|
||||
* @dev: the device structure
|
||||
* @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
|
||||
*/
|
||||
u8 mei_find_me_client_update_filext(struct mei_device *dev, struct mei_cl *priv,
|
||||
const uuid_le *cguid, u8 client_id)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (!dev || !priv || !cguid)
|
||||
return 0;
|
||||
|
||||
/* check for valid client id */
|
||||
i = mei_find_me_client_index(dev, *cguid);
|
||||
if (i >= 0) {
|
||||
priv->me_client_id = dev->me_clients[i].client_id;
|
||||
priv->state = MEI_FILE_CONNECTING;
|
||||
priv->host_client_id = client_id;
|
||||
|
||||
list_add_tail(&priv->link, &dev->file_list);
|
||||
return (u8)i;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* host_init_iamthif - mei initialization iamthif client.
|
||||
*
|
||||
* @dev: the device structure
|
||||
*
|
||||
*/
|
||||
void host_init_iamthif(struct mei_device *dev)
|
||||
{
|
||||
u8 i;
|
||||
unsigned char *msg_buf;
|
||||
|
||||
mei_init_file_private(&dev->iamthif_cl, dev);
|
||||
dev->iamthif_cl.state = MEI_FILE_DISCONNECTED;
|
||||
|
||||
/* find ME amthi client */
|
||||
i = mei_find_me_client_update_filext(dev, &dev->iamthif_cl,
|
||||
&mei_amthi_guid, MEI_IAMTHIF_HOST_CLIENT_ID);
|
||||
if (dev->iamthif_cl.state != MEI_FILE_CONNECTING) {
|
||||
dev_dbg(&dev->pdev->dev, "failed to find iamthif client.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Do not render the system unusable when iamthif_mtu is not equal to
|
||||
the value received from ME.
|
||||
Assign iamthif_mtu to the value received from ME in order to solve the
|
||||
hardware macro incompatibility. */
|
||||
|
||||
dev_dbg(&dev->pdev->dev, "[DEFAULT] IAMTHIF = %d\n", dev->iamthif_mtu);
|
||||
dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length;
|
||||
dev_dbg(&dev->pdev->dev,
|
||||
"IAMTHIF = %d\n",
|
||||
dev->me_clients[i].props.max_msg_length);
|
||||
|
||||
kfree(dev->iamthif_msg_buf);
|
||||
dev->iamthif_msg_buf = NULL;
|
||||
|
||||
/* allocate storage for ME message buffer */
|
||||
msg_buf = kcalloc(dev->iamthif_mtu,
|
||||
sizeof(unsigned char), GFP_KERNEL);
|
||||
if (!msg_buf) {
|
||||
dev_dbg(&dev->pdev->dev, "memory allocation for ME message buffer failed.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
dev->iamthif_msg_buf = msg_buf;
|
||||
|
||||
if (!mei_connect(dev, &dev->iamthif_cl)) {
|
||||
dev_dbg(&dev->pdev->dev, "Failed to connect to AMTHI client\n");
|
||||
dev->iamthif_cl.state = MEI_FILE_DISCONNECTED;
|
||||
dev->iamthif_cl.host_client_id = 0;
|
||||
} else {
|
||||
dev->iamthif_cl.timer_count = CONNECT_TIMEOUT;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_alloc_file_private - allocates a private file structure and sets it up.
|
||||
* @file: the file structure
|
||||
*
|
||||
* returns The allocated file or NULL on failure
|
||||
*/
|
||||
struct mei_cl *mei_alloc_file_private(struct mei_device *dev)
|
||||
{
|
||||
struct mei_cl *priv;
|
||||
|
||||
priv = kmalloc(sizeof(struct mei_cl), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return NULL;
|
||||
|
||||
mei_init_file_private(priv, dev);
|
||||
|
||||
return priv;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* mei_disconnect_host_client - sends disconnect message to fw from host client.
|
||||
*
|
||||
* @dev: the device structure
|
||||
* @cl: private data of the file object
|
||||
*
|
||||
* Locking: called under "dev->device_lock" lock
|
||||
*
|
||||
* returns 0 on success, <0 on failure.
|
||||
*/
|
||||
int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl)
|
||||
{
|
||||
int rets, err;
|
||||
long timeout = 15; /* 15 seconds */
|
||||
struct mei_cl_cb *cb;
|
||||
|
||||
if (!dev || !cl)
|
||||
return -ENODEV;
|
||||
|
||||
if (cl->state != MEI_FILE_DISCONNECTING)
|
||||
return 0;
|
||||
|
||||
cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL);
|
||||
if (!cb)
|
||||
return -ENOMEM;
|
||||
|
||||
INIT_LIST_HEAD(&cb->cb_list);
|
||||
cb->file_private = cl;
|
||||
cb->major_file_operations = MEI_CLOSE;
|
||||
if (dev->mei_host_buffer_is_empty) {
|
||||
dev->mei_host_buffer_is_empty = 0;
|
||||
if (mei_disconnect(dev, cl)) {
|
||||
mdelay(10); /* Wait for hardware disconnection ready */
|
||||
list_add_tail(&cb->cb_list,
|
||||
&dev->ctrl_rd_list.mei_cb.cb_list);
|
||||
} else {
|
||||
rets = -ENODEV;
|
||||
dev_dbg(&dev->pdev->dev, "failed to call mei_disconnect.\n");
|
||||
goto free;
|
||||
}
|
||||
} else {
|
||||
dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n");
|
||||
list_add_tail(&cb->cb_list,
|
||||
&dev->ctrl_wr_list.mei_cb.cb_list);
|
||||
}
|
||||
mutex_unlock(&dev->device_lock);
|
||||
|
||||
err = wait_event_timeout(dev->wait_recvd_msg,
|
||||
(MEI_FILE_DISCONNECTED == cl->state),
|
||||
timeout * HZ);
|
||||
|
||||
mutex_lock(&dev->device_lock);
|
||||
if (MEI_FILE_DISCONNECTED == cl->state) {
|
||||
rets = 0;
|
||||
dev_dbg(&dev->pdev->dev, "successfully disconnected from FW client.\n");
|
||||
} else {
|
||||
rets = -ENODEV;
|
||||
if (MEI_FILE_DISCONNECTED != cl->state)
|
||||
dev_dbg(&dev->pdev->dev, "wrong status client disconnect.\n");
|
||||
|
||||
if (err)
|
||||
dev_dbg(&dev->pdev->dev,
|
||||
"wait failed disconnect err=%08x\n",
|
||||
err);
|
||||
|
||||
dev_dbg(&dev->pdev->dev, "failed to disconnect from FW client.\n");
|
||||
}
|
||||
|
||||
mei_flush_list(&dev->ctrl_rd_list, cl);
|
||||
mei_flush_list(&dev->ctrl_wr_list, cl);
|
||||
free:
|
||||
mei_free_cb_private(cb);
|
||||
return rets;
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_remove_client_from_file_list -
|
||||
* removes file private data from device file list
|
||||
*
|
||||
* @dev: the device structure
|
||||
* @host_client_id: host client id to be removed
|
||||
*/
|
||||
void mei_remove_client_from_file_list(struct mei_device *dev,
|
||||
u8 host_client_id)
|
||||
{
|
||||
struct mei_cl *cl_pos = NULL;
|
||||
struct mei_cl *cl_next = NULL;
|
||||
list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
|
||||
if (host_client_id == cl_pos->host_client_id) {
|
||||
dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n",
|
||||
cl_pos->host_client_id,
|
||||
cl_pos->me_client_id);
|
||||
list_del_init(&cl_pos->link);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user