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![Oren Weil](/assets/img/avatar_default.png)
ISR and interrupt thread for handling incoming data. e.g. read bus message, read client message, handle reset requests. quick handler: As MEI may share interrupt with GFX and/or USB the HW register need to be checked and acknowledged. thread handler: Check if HW has data for read. Write data to HW if possible. May init reset flow on error there can be two types of messages: 1) bus messages: Management messages between MEI Driver and ME e.g. Connect request/response, Disconnect request/response Enum clients request/response Flow control request/response those message are indicated by ME Address/ID == 0 && Host Address/ID == 0 2) feature/client messages: message that are sends between ME Feature/Client and an application, the struct of the message is defined by the ME Feature Protocol (e.g. APF Protocol, AMTHI Protocol) those message are indicated by ME Address/ID != 0 && Host Address/ID != 0 MEI Initialization state machine is also managed by this patch. After MEI Reset is preform: Send Start request wait for answer Send Enumerate Clients request wait for answer Send Get Client property for each client request wait for answers Init Done. 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>
1624 lines
44 KiB
C
1624 lines
44 KiB
C
/*
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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/kthread.h>
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#include <linux/interrupt.h>
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#include <linux/fs.h>
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#include <linux/jiffies.h>
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#include "mei_dev.h"
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#include "mei.h"
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#include "hw.h"
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#include "interface.h"
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/**
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* mei_interrupt_quick_handler - The ISR of the MEI device
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*
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* @irq: The irq number
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* @dev_id: pointer to the device structure
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*
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* returns irqreturn_t
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*/
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irqreturn_t mei_interrupt_quick_handler(int irq, void *dev_id)
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{
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struct mei_device *dev = (struct mei_device *) dev_id;
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u32 csr_reg = mei_hcsr_read(dev);
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if ((csr_reg & H_IS) != H_IS)
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return IRQ_NONE;
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/* clear H_IS bit in H_CSR */
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mei_reg_write(dev, H_CSR, csr_reg);
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return IRQ_WAKE_THREAD;
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}
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/**
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* _mei_cmpl - processes completed operation.
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*
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* @cl: private data of the file object.
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* @cb_pos: callback block.
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*/
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static void _mei_cmpl(struct mei_cl *cl, struct mei_cl_cb *cb_pos)
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{
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if (cb_pos->major_file_operations == MEI_WRITE) {
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mei_free_cb_private(cb_pos);
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cb_pos = NULL;
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cl->writing_state = MEI_WRITE_COMPLETE;
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if (waitqueue_active(&cl->tx_wait))
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wake_up_interruptible(&cl->tx_wait);
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} else if (cb_pos->major_file_operations == MEI_READ &&
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MEI_READING == cl->reading_state) {
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cl->reading_state = MEI_READ_COMPLETE;
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if (waitqueue_active(&cl->rx_wait))
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wake_up_interruptible(&cl->rx_wait);
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}
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}
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/**
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* _mei_cmpl_iamthif - processes completed iamthif operation.
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*
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* @dev: the device structure.
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* @cb_pos: callback block.
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*/
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static void _mei_cmpl_iamthif(struct mei_device *dev, struct mei_cl_cb *cb_pos)
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{
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if (dev->iamthif_canceled != 1) {
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dev->iamthif_state = MEI_IAMTHIF_READ_COMPLETE;
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dev->iamthif_stall_timer = 0;
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memcpy(cb_pos->response_buffer.data,
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dev->iamthif_msg_buf,
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dev->iamthif_msg_buf_index);
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list_add_tail(&cb_pos->cb_list,
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&dev->amthi_read_complete_list.mei_cb.cb_list);
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dev_dbg(&dev->pdev->dev, "amthi read completed.\n");
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dev->iamthif_timer = jiffies;
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dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n",
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dev->iamthif_timer);
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} else {
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run_next_iamthif_cmd(dev);
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}
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dev_dbg(&dev->pdev->dev, "completing amthi call back.\n");
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wake_up_interruptible(&dev->iamthif_cl.wait);
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}
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/**
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* mei_irq_thread_read_amthi_message - bottom half read routine after ISR to
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* handle the read amthi message data processing.
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*
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* @complete_list: An instance of our list structure
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* @dev: the device structure
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* @mei_hdr: header of amthi message
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*
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* returns 0 on success, <0 on failure.
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*/
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static int mei_irq_thread_read_amthi_message(struct mei_io_list *complete_list,
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struct mei_device *dev,
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struct mei_msg_hdr *mei_hdr)
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{
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struct mei_cl *cl;
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struct mei_cl_cb *cb;
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unsigned char *buffer;
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BUG_ON(mei_hdr->me_addr != dev->iamthif_cl.me_client_id);
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BUG_ON(dev->iamthif_state != MEI_IAMTHIF_READING);
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buffer = (unsigned char *) (dev->iamthif_msg_buf +
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dev->iamthif_msg_buf_index);
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BUG_ON(dev->iamthif_mtu < dev->iamthif_msg_buf_index + mei_hdr->length);
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mei_read_slots(dev, buffer, mei_hdr->length);
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dev->iamthif_msg_buf_index += mei_hdr->length;
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if (!mei_hdr->msg_complete)
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return 0;
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dev_dbg(&dev->pdev->dev,
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"amthi_message_buffer_index =%d\n",
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mei_hdr->length);
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dev_dbg(&dev->pdev->dev, "completed amthi read.\n ");
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if (!dev->iamthif_current_cb)
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return -ENODEV;
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cb = dev->iamthif_current_cb;
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dev->iamthif_current_cb = NULL;
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cl = (struct mei_cl *)cb->file_private;
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if (!cl)
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return -ENODEV;
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dev->iamthif_stall_timer = 0;
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cb->information = dev->iamthif_msg_buf_index;
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cb->read_time = jiffies;
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if (dev->iamthif_ioctl && cl == &dev->iamthif_cl) {
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/* found the iamthif cb */
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dev_dbg(&dev->pdev->dev, "complete the amthi read cb.\n ");
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dev_dbg(&dev->pdev->dev, "add the amthi read cb to complete.\n ");
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list_add_tail(&cb->cb_list,
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&complete_list->mei_cb.cb_list);
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}
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return 0;
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}
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/**
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* _mei_irq_thread_state_ok - checks if mei header matches file private data
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*
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* @cl: private data of the file object
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* @mei_hdr: header of mei client message
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*
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* returns !=0 if matches, 0 if no match.
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*/
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static int _mei_irq_thread_state_ok(struct mei_cl *cl,
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struct mei_msg_hdr *mei_hdr)
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{
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return (cl->host_client_id == mei_hdr->host_addr &&
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cl->me_client_id == mei_hdr->me_addr &&
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cl->state == MEI_FILE_CONNECTED &&
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MEI_READ_COMPLETE != cl->reading_state);
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}
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/**
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* mei_irq_thread_read_client_message - bottom half read routine after ISR to
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* handle the read mei client message data processing.
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*
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* @complete_list: An instance of our list structure
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* @dev: the device structure
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* @mei_hdr: header of mei client message
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*
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* returns 0 on success, <0 on failure.
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*/
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static int mei_irq_thread_read_client_message(struct mei_io_list *complete_list,
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struct mei_device *dev,
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struct mei_msg_hdr *mei_hdr)
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{
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struct mei_cl *cl;
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struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
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unsigned char *buffer;
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dev_dbg(&dev->pdev->dev, "start client msg\n");
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if (!(dev->read_list.status == 0 &&
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!list_empty(&dev->read_list.mei_cb.cb_list)))
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goto quit;
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list_for_each_entry_safe(cb_pos, cb_next,
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&dev->read_list.mei_cb.cb_list, cb_list) {
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cl = (struct mei_cl *)cb_pos->file_private;
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if (cl && _mei_irq_thread_state_ok(cl, mei_hdr)) {
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cl->reading_state = MEI_READING;
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buffer = (unsigned char *)
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(cb_pos->response_buffer.data +
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cb_pos->information);
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BUG_ON(cb_pos->response_buffer.size <
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mei_hdr->length +
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cb_pos->information);
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if (cb_pos->response_buffer.size <
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mei_hdr->length + cb_pos->information) {
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dev_dbg(&dev->pdev->dev, "message overflow.\n");
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list_del(&cb_pos->cb_list);
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return -ENOMEM;
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}
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if (buffer)
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mei_read_slots(dev, buffer, mei_hdr->length);
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cb_pos->information += mei_hdr->length;
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if (mei_hdr->msg_complete) {
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cl->status = 0;
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list_del(&cb_pos->cb_list);
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dev_dbg(&dev->pdev->dev,
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"completed read host client = %d,"
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"ME client = %d, "
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"data length = %lu\n",
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cl->host_client_id,
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cl->me_client_id,
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cb_pos->information);
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*(cb_pos->response_buffer.data +
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cb_pos->information) = '\0';
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dev_dbg(&dev->pdev->dev, "cb_pos->res_buffer - %s\n",
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cb_pos->response_buffer.data);
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list_add_tail(&cb_pos->cb_list,
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&complete_list->mei_cb.cb_list);
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}
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break;
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}
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}
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quit:
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dev_dbg(&dev->pdev->dev, "message read\n");
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if (!buffer) {
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mei_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
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mei_hdr->length);
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dev_dbg(&dev->pdev->dev, "discarding message, header =%08x.\n",
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*(u32 *) dev->rd_msg_buf);
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}
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return 0;
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}
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/**
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* _mei_irq_thread_iamthif_read - prepares to read iamthif data.
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*
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* @dev: the device structure.
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* @slots: free slots.
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*
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* returns 0, OK; otherwise, error.
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*/
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static int _mei_irq_thread_iamthif_read(struct mei_device *dev, s32 *slots)
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{
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if (((*slots) * sizeof(u32)) >= (sizeof(struct mei_msg_hdr)
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+ sizeof(struct hbm_flow_control))) {
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*slots -= (sizeof(struct mei_msg_hdr) +
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sizeof(struct hbm_flow_control) + 3) / 4;
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if (!mei_send_flow_control(dev, &dev->iamthif_cl)) {
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dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
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} else {
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dev_dbg(&dev->pdev->dev, "iamthif flow control success\n");
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dev->iamthif_state = MEI_IAMTHIF_READING;
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dev->iamthif_flow_control_pending = 0;
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dev->iamthif_msg_buf_index = 0;
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dev->iamthif_msg_buf_size = 0;
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dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
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dev->mei_host_buffer_is_empty =
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mei_host_buffer_is_empty(dev);
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}
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return 0;
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} else {
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return -EMSGSIZE;
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}
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}
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/**
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* _mei_irq_thread_close - processes close related operation.
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*
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* @dev: the device structure.
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* @slots: free slots.
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* @cb_pos: callback block.
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* @cl: private data of the file object.
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* @cmpl_list: complete list.
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*
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* returns 0, OK; otherwise, error.
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*/
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static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots,
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struct mei_cl_cb *cb_pos,
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struct mei_cl *cl,
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struct mei_io_list *cmpl_list)
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{
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if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
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sizeof(struct hbm_client_disconnect_request))) {
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*slots -= (sizeof(struct mei_msg_hdr) +
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sizeof(struct hbm_client_disconnect_request) + 3) / 4;
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if (!mei_disconnect(dev, cl)) {
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cl->status = 0;
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cb_pos->information = 0;
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list_move_tail(&cb_pos->cb_list,
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&cmpl_list->mei_cb.cb_list);
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return -EMSGSIZE;
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} else {
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cl->state = MEI_FILE_DISCONNECTING;
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cl->status = 0;
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cb_pos->information = 0;
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list_move_tail(&cb_pos->cb_list,
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&dev->ctrl_rd_list.mei_cb.cb_list);
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cl->timer_count = MEI_CONNECT_TIMEOUT;
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}
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} else {
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/* return the cancel routine */
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return -EBADMSG;
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}
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return 0;
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}
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/**
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* is_treat_specially_client - checks if the message belongs
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* to the file private data.
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*
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* @cl: private data of the file object
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* @rs: connect response bus message
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*
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*/
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static bool is_treat_specially_client(struct mei_cl *cl,
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struct hbm_client_connect_response *rs)
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{
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if (cl->host_client_id == rs->host_addr &&
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cl->me_client_id == rs->me_addr) {
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if (!rs->status) {
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cl->state = MEI_FILE_CONNECTED;
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cl->status = 0;
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} else {
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cl->state = MEI_FILE_DISCONNECTED;
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cl->status = -ENODEV;
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}
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cl->timer_count = 0;
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return true;
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}
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return false;
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}
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/**
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* mei_client_connect_response - connects to response irq routine
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*
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* @dev: the device structure
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* @rs: connect response bus message
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*/
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static void mei_client_connect_response(struct mei_device *dev,
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struct hbm_client_connect_response *rs)
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{
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struct mei_cl *cl;
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struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
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dev_dbg(&dev->pdev->dev,
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"connect_response:\n"
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"ME Client = %d\n"
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"Host Client = %d\n"
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"Status = %d\n",
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rs->me_addr,
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rs->host_addr,
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rs->status);
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/* if WD or iamthif client treat specially */
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if (is_treat_specially_client(&(dev->wd_cl), rs)) {
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dev_dbg(&dev->pdev->dev, "dev->wd_timeout =%d.\n",
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dev->wd_timeout);
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dev->wd_due_counter = (dev->wd_timeout) ? 1 : 0;
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dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
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host_init_iamthif(dev);
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return;
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}
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if (is_treat_specially_client(&(dev->iamthif_cl), rs)) {
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dev->iamthif_state = MEI_IAMTHIF_IDLE;
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return;
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}
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if (!dev->ctrl_rd_list.status &&
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!list_empty(&dev->ctrl_rd_list.mei_cb.cb_list)) {
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list_for_each_entry_safe(cb_pos, cb_next,
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&dev->ctrl_rd_list.mei_cb.cb_list, cb_list) {
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cl = (struct mei_cl *)cb_pos->file_private;
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if (!cl) {
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list_del(&cb_pos->cb_list);
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return;
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}
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if (MEI_IOCTL == cb_pos->major_file_operations) {
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if (is_treat_specially_client(cl, rs)) {
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list_del(&cb_pos->cb_list);
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cl->status = 0;
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cl->timer_count = 0;
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break;
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}
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}
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}
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}
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}
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|
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/**
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* mei_client_disconnect_response - disconnects from response irq routine
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*
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* @dev: the device structure
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* @rs: disconnect response bus message
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*/
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static void mei_client_disconnect_response(struct mei_device *dev,
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struct hbm_client_connect_response *rs)
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{
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struct mei_cl *cl;
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struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
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dev_dbg(&dev->pdev->dev,
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"disconnect_response:\n"
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"ME Client = %d\n"
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"Host Client = %d\n"
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"Status = %d\n",
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rs->me_addr,
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rs->host_addr,
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rs->status);
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if (!dev->ctrl_rd_list.status &&
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!list_empty(&dev->ctrl_rd_list.mei_cb.cb_list)) {
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list_for_each_entry_safe(cb_pos, cb_next,
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&dev->ctrl_rd_list.mei_cb.cb_list, cb_list) {
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cl = (struct mei_cl *)cb_pos->file_private;
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if (!cl) {
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list_del(&cb_pos->cb_list);
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return;
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}
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dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
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if (cl->host_client_id == rs->host_addr &&
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cl->me_client_id == rs->me_addr) {
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list_del(&cb_pos->cb_list);
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if (!rs->status)
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cl->state = MEI_FILE_DISCONNECTED;
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cl->status = 0;
|
|
cl->timer_count = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* same_flow_addr - tells if they have the same address.
|
|
*
|
|
* @file: private data of the file object.
|
|
* @flow: flow control.
|
|
*
|
|
* returns !=0, same; 0,not.
|
|
*/
|
|
static int same_flow_addr(struct mei_cl *cl, struct hbm_flow_control *flow)
|
|
{
|
|
return (cl->host_client_id == flow->host_addr &&
|
|
cl->me_client_id == flow->me_addr);
|
|
}
|
|
|
|
/**
|
|
* add_single_flow_creds - adds single buffer credentials.
|
|
*
|
|
* @file: private data ot the file object.
|
|
* @flow: flow control.
|
|
*/
|
|
static void add_single_flow_creds(struct mei_device *dev,
|
|
struct hbm_flow_control *flow)
|
|
{
|
|
struct mei_me_client *client;
|
|
int i;
|
|
|
|
for (i = 0; i < dev->num_mei_me_clients; i++) {
|
|
client = &dev->me_clients[i];
|
|
if (client && flow->me_addr == client->client_id) {
|
|
if (client->props.single_recv_buf) {
|
|
client->mei_flow_ctrl_creds++;
|
|
dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
|
|
flow->me_addr);
|
|
dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
|
|
client->mei_flow_ctrl_creds);
|
|
} else {
|
|
BUG(); /* error in flow control */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* mei_client_flow_control_response - flow control response irq routine
|
|
*
|
|
* @dev: the device structure
|
|
* @flow_control: flow control response bus message
|
|
*/
|
|
static void mei_client_flow_control_response(struct mei_device *dev,
|
|
struct hbm_flow_control *flow_control)
|
|
{
|
|
struct mei_cl *cl_pos = NULL;
|
|
struct mei_cl *cl_next = NULL;
|
|
|
|
if (!flow_control->host_addr) {
|
|
/* single receive buffer */
|
|
add_single_flow_creds(dev, flow_control);
|
|
} else {
|
|
/* normal connection */
|
|
list_for_each_entry_safe(cl_pos, cl_next,
|
|
&dev->file_list, link) {
|
|
dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in file_list\n");
|
|
|
|
dev_dbg(&dev->pdev->dev, "cl of host client %d ME client %d.\n",
|
|
cl_pos->host_client_id,
|
|
cl_pos->me_client_id);
|
|
dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
|
|
flow_control->host_addr,
|
|
flow_control->me_addr);
|
|
if (same_flow_addr(cl_pos, flow_control)) {
|
|
dev_dbg(&dev->pdev->dev, "recv ctrl msg for host %d ME %d.\n",
|
|
flow_control->host_addr,
|
|
flow_control->me_addr);
|
|
cl_pos->mei_flow_ctrl_creds++;
|
|
dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n",
|
|
cl_pos->mei_flow_ctrl_creds);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* same_disconn_addr - tells if they have the same address
|
|
*
|
|
* @file: private data of the file object.
|
|
* @disconn: disconnection request.
|
|
*
|
|
* returns !=0, same; 0,not.
|
|
*/
|
|
static int same_disconn_addr(struct mei_cl *cl,
|
|
struct hbm_client_disconnect_request *disconn)
|
|
{
|
|
return (cl->host_client_id == disconn->host_addr &&
|
|
cl->me_client_id == disconn->me_addr);
|
|
}
|
|
|
|
/**
|
|
* mei_client_disconnect_request - disconnects from request irq routine
|
|
*
|
|
* @dev: the device structure.
|
|
* @disconnect_req: disconnect request bus message.
|
|
*/
|
|
static void mei_client_disconnect_request(struct mei_device *dev,
|
|
struct hbm_client_disconnect_request *disconnect_req)
|
|
{
|
|
struct mei_msg_hdr *mei_hdr;
|
|
struct hbm_client_connect_response *disconnect_res;
|
|
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 (same_disconn_addr(cl_pos, disconnect_req)) {
|
|
dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n",
|
|
disconnect_req->host_addr,
|
|
disconnect_req->me_addr);
|
|
cl_pos->state = MEI_FILE_DISCONNECTED;
|
|
cl_pos->timer_count = 0;
|
|
if (cl_pos == &dev->wd_cl) {
|
|
dev->wd_due_counter = 0;
|
|
dev->wd_pending = 0;
|
|
} else if (cl_pos == &dev->iamthif_cl)
|
|
dev->iamthif_timer = 0;
|
|
|
|
/* prepare disconnect response */
|
|
mei_hdr =
|
|
(struct mei_msg_hdr *) &dev->ext_msg_buf[0];
|
|
mei_hdr->host_addr = 0;
|
|
mei_hdr->me_addr = 0;
|
|
mei_hdr->length =
|
|
sizeof(struct hbm_client_connect_response);
|
|
mei_hdr->msg_complete = 1;
|
|
mei_hdr->reserved = 0;
|
|
|
|
disconnect_res =
|
|
(struct hbm_client_connect_response *)
|
|
&dev->ext_msg_buf[1];
|
|
disconnect_res->host_addr = cl_pos->host_client_id;
|
|
disconnect_res->me_addr = cl_pos->me_client_id;
|
|
*(u8 *) (&disconnect_res->cmd) =
|
|
CLIENT_DISCONNECT_RES_CMD;
|
|
disconnect_res->status = 0;
|
|
dev->extra_write_index = 2;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* mei_irq_thread_read_bus_message - bottom half read routine after ISR to
|
|
* handle the read bus message cmd processing.
|
|
*
|
|
* @dev: the device structure
|
|
* @mei_hdr: header of bus message
|
|
*/
|
|
static void mei_irq_thread_read_bus_message(struct mei_device *dev,
|
|
struct mei_msg_hdr *mei_hdr)
|
|
{
|
|
struct mei_bus_message *mei_msg;
|
|
struct hbm_host_version_response *version_res;
|
|
struct hbm_client_connect_response *connect_res;
|
|
struct hbm_client_connect_response *disconnect_res;
|
|
struct hbm_flow_control *flow_control;
|
|
struct hbm_props_response *props_res;
|
|
struct hbm_host_enum_response *enum_res;
|
|
struct hbm_client_disconnect_request *disconnect_req;
|
|
struct hbm_host_stop_request *host_stop_req;
|
|
|
|
unsigned char *buffer;
|
|
|
|
/* read the message to our buffer */
|
|
buffer = (unsigned char *) dev->rd_msg_buf;
|
|
BUG_ON(mei_hdr->length >= sizeof(dev->rd_msg_buf));
|
|
mei_read_slots(dev, buffer, mei_hdr->length);
|
|
mei_msg = (struct mei_bus_message *) buffer;
|
|
|
|
switch (*(u8 *) mei_msg) {
|
|
case HOST_START_RES_CMD:
|
|
version_res = (struct hbm_host_version_response *) mei_msg;
|
|
if (version_res->host_version_supported) {
|
|
dev->version.major_version = HBM_MAJOR_VERSION;
|
|
dev->version.minor_version = HBM_MINOR_VERSION;
|
|
if (dev->mei_state == MEI_INIT_CLIENTS &&
|
|
dev->init_clients_state == MEI_START_MESSAGE) {
|
|
dev->init_clients_timer = 0;
|
|
host_enum_clients_message(dev);
|
|
} else {
|
|
dev->recvd_msg = 0;
|
|
dev_dbg(&dev->pdev->dev, "IMEI reset due to received host start response bus message.\n");
|
|
mei_reset(dev, 1);
|
|
return;
|
|
}
|
|
} else {
|
|
dev->version = version_res->me_max_version;
|
|
/* send stop message */
|
|
mei_hdr->host_addr = 0;
|
|
mei_hdr->me_addr = 0;
|
|
mei_hdr->length = sizeof(struct hbm_host_stop_request);
|
|
mei_hdr->msg_complete = 1;
|
|
mei_hdr->reserved = 0;
|
|
|
|
host_stop_req = (struct hbm_host_stop_request *)
|
|
&dev->wr_msg_buf[1];
|
|
|
|
memset(host_stop_req,
|
|
0,
|
|
sizeof(struct hbm_host_stop_request));
|
|
host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
|
|
host_stop_req->reason = DRIVER_STOP_REQUEST;
|
|
mei_write_message(dev, mei_hdr,
|
|
(unsigned char *) (host_stop_req),
|
|
mei_hdr->length);
|
|
dev_dbg(&dev->pdev->dev, "version mismatch.\n");
|
|
return;
|
|
}
|
|
|
|
dev->recvd_msg = 1;
|
|
dev_dbg(&dev->pdev->dev, "host start response message received.\n");
|
|
break;
|
|
|
|
case CLIENT_CONNECT_RES_CMD:
|
|
connect_res =
|
|
(struct hbm_client_connect_response *) mei_msg;
|
|
mei_client_connect_response(dev, connect_res);
|
|
dev_dbg(&dev->pdev->dev, "client connect response message received.\n");
|
|
wake_up(&dev->wait_recvd_msg);
|
|
break;
|
|
|
|
case CLIENT_DISCONNECT_RES_CMD:
|
|
disconnect_res =
|
|
(struct hbm_client_connect_response *) mei_msg;
|
|
mei_client_disconnect_response(dev, disconnect_res);
|
|
dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n");
|
|
wake_up(&dev->wait_recvd_msg);
|
|
break;
|
|
|
|
case MEI_FLOW_CONTROL_CMD:
|
|
flow_control = (struct hbm_flow_control *) mei_msg;
|
|
mei_client_flow_control_response(dev, flow_control);
|
|
dev_dbg(&dev->pdev->dev, "client flow control response message received.\n");
|
|
break;
|
|
|
|
case HOST_CLIENT_PROPERTIES_RES_CMD:
|
|
props_res = (struct hbm_props_response *)mei_msg;
|
|
if (props_res->status || !dev->me_clients) {
|
|
dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n");
|
|
mei_reset(dev, 1);
|
|
return;
|
|
}
|
|
if (dev->me_clients[dev->me_client_presentation_num]
|
|
.client_id == props_res->address) {
|
|
|
|
dev->me_clients[dev->me_client_presentation_num].props
|
|
= props_res->client_properties;
|
|
|
|
if (dev->mei_state == MEI_INIT_CLIENTS &&
|
|
dev->init_clients_state ==
|
|
MEI_CLIENT_PROPERTIES_MESSAGE) {
|
|
dev->me_client_index++;
|
|
dev->me_client_presentation_num++;
|
|
host_client_properties(dev);
|
|
} else {
|
|
dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message");
|
|
mei_reset(dev, 1);
|
|
return;
|
|
}
|
|
} else {
|
|
dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message for wrong client ID\n");
|
|
mei_reset(dev, 1);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case HOST_ENUM_RES_CMD:
|
|
enum_res = (struct hbm_host_enum_response *) mei_msg;
|
|
memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
|
|
if (dev->mei_state == MEI_INIT_CLIENTS &&
|
|
dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) {
|
|
dev->init_clients_timer = 0;
|
|
dev->me_client_presentation_num = 0;
|
|
dev->me_client_index = 0;
|
|
allocate_me_clients_storage(dev);
|
|
dev->init_clients_state =
|
|
MEI_CLIENT_PROPERTIES_MESSAGE;
|
|
host_client_properties(dev);
|
|
} else {
|
|
dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n");
|
|
mei_reset(dev, 1);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case HOST_STOP_RES_CMD:
|
|
dev->mei_state = MEI_DISABLED;
|
|
dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n");
|
|
mei_reset(dev, 1);
|
|
break;
|
|
|
|
case CLIENT_DISCONNECT_REQ_CMD:
|
|
/* search for client */
|
|
disconnect_req =
|
|
(struct hbm_client_disconnect_request *) mei_msg;
|
|
mei_client_disconnect_request(dev, disconnect_req);
|
|
break;
|
|
|
|
case ME_STOP_REQ_CMD:
|
|
/* prepare stop request */
|
|
mei_hdr = (struct mei_msg_hdr *) &dev->ext_msg_buf[0];
|
|
mei_hdr->host_addr = 0;
|
|
mei_hdr->me_addr = 0;
|
|
mei_hdr->length = sizeof(struct hbm_host_stop_request);
|
|
mei_hdr->msg_complete = 1;
|
|
mei_hdr->reserved = 0;
|
|
host_stop_req =
|
|
(struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
|
|
memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
|
|
host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
|
|
host_stop_req->reason = DRIVER_STOP_REQUEST;
|
|
host_stop_req->reserved[0] = 0;
|
|
host_stop_req->reserved[1] = 0;
|
|
dev->extra_write_index = 2;
|
|
break;
|
|
|
|
default:
|
|
BUG();
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* _mei_hb_read - processes read related operation.
|
|
*
|
|
* @dev: the device structure.
|
|
* @slots: free slots.
|
|
* @cb_pos: callback block.
|
|
* @cl: private data of the file object.
|
|
* @cmpl_list: complete list.
|
|
*
|
|
* returns 0, OK; otherwise, error.
|
|
*/
|
|
static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots,
|
|
struct mei_cl_cb *cb_pos,
|
|
struct mei_cl *cl,
|
|
struct mei_io_list *cmpl_list)
|
|
{
|
|
if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
|
|
sizeof(struct hbm_flow_control))) {
|
|
*slots -= (sizeof(struct mei_msg_hdr) +
|
|
sizeof(struct hbm_flow_control) + 3) / 4;
|
|
if (!mei_send_flow_control(dev, cl)) {
|
|
cl->status = -ENODEV;
|
|
cb_pos->information = 0;
|
|
list_move_tail(&cb_pos->cb_list,
|
|
&cmpl_list->mei_cb.cb_list);
|
|
return -ENODEV;
|
|
} else {
|
|
list_move_tail(&cb_pos->cb_list,
|
|
&dev->read_list.mei_cb.cb_list);
|
|
}
|
|
} else {
|
|
/* return the cancel routine */
|
|
list_del(&cb_pos->cb_list);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* _mei_irq_thread_ioctl - processes ioctl related operation.
|
|
*
|
|
* @dev: the device structure.
|
|
* @slots: free slots.
|
|
* @cb_pos: callback block.
|
|
* @cl: private data of the file object.
|
|
* @cmpl_list: complete list.
|
|
*
|
|
* returns 0, OK; otherwise, error.
|
|
*/
|
|
static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots,
|
|
struct mei_cl_cb *cb_pos,
|
|
struct mei_cl *cl,
|
|
struct mei_io_list *cmpl_list)
|
|
{
|
|
if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
|
|
sizeof(struct hbm_client_connect_request))) {
|
|
cl->state = MEI_FILE_CONNECTING;
|
|
*slots -= (sizeof(struct mei_msg_hdr) +
|
|
sizeof(struct hbm_client_connect_request) + 3) / 4;
|
|
if (!mei_connect(dev, cl)) {
|
|
cl->status = -ENODEV;
|
|
cb_pos->information = 0;
|
|
list_del(&cb_pos->cb_list);
|
|
return -ENODEV;
|
|
} else {
|
|
list_move_tail(&cb_pos->cb_list,
|
|
&dev->ctrl_rd_list.mei_cb.cb_list);
|
|
cl->timer_count = MEI_CONNECT_TIMEOUT;
|
|
}
|
|
} else {
|
|
/* return the cancel routine */
|
|
list_del(&cb_pos->cb_list);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* _mei_irq_thread_cmpl - processes completed and no-iamthif operation.
|
|
*
|
|
* @dev: the device structure.
|
|
* @slots: free slots.
|
|
* @cb_pos: callback block.
|
|
* @cl: private data of the file object.
|
|
* @cmpl_list: complete list.
|
|
*
|
|
* returns 0, OK; otherwise, error.
|
|
*/
|
|
static int _mei_irq_thread_cmpl(struct mei_device *dev, s32 *slots,
|
|
struct mei_cl_cb *cb_pos,
|
|
struct mei_cl *cl,
|
|
struct mei_io_list *cmpl_list)
|
|
{
|
|
struct mei_msg_hdr *mei_hdr;
|
|
|
|
if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
|
|
(cb_pos->request_buffer.size -
|
|
cb_pos->information))) {
|
|
mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
|
|
mei_hdr->host_addr = cl->host_client_id;
|
|
mei_hdr->me_addr = cl->me_client_id;
|
|
mei_hdr->length = cb_pos->request_buffer.size -
|
|
cb_pos->information;
|
|
mei_hdr->msg_complete = 1;
|
|
mei_hdr->reserved = 0;
|
|
dev_dbg(&dev->pdev->dev, "cb_pos->request_buffer.size =%d"
|
|
"mei_hdr->msg_complete = %d\n",
|
|
cb_pos->request_buffer.size,
|
|
mei_hdr->msg_complete);
|
|
dev_dbg(&dev->pdev->dev, "cb_pos->information =%lu\n",
|
|
cb_pos->information);
|
|
dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n",
|
|
mei_hdr->length);
|
|
*slots -= (sizeof(struct mei_msg_hdr) +
|
|
mei_hdr->length + 3) / 4;
|
|
if (!mei_write_message(dev, mei_hdr,
|
|
(unsigned char *)
|
|
(cb_pos->request_buffer.data +
|
|
cb_pos->information),
|
|
mei_hdr->length)) {
|
|
cl->status = -ENODEV;
|
|
list_move_tail(&cb_pos->cb_list,
|
|
&cmpl_list->mei_cb.cb_list);
|
|
return -ENODEV;
|
|
} else {
|
|
if (mei_flow_ctrl_reduce(dev, cl))
|
|
return -ENODEV;
|
|
cl->status = 0;
|
|
cb_pos->information += mei_hdr->length;
|
|
list_move_tail(&cb_pos->cb_list,
|
|
&dev->write_waiting_list.mei_cb.cb_list);
|
|
}
|
|
} else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
|
|
/* buffer is still empty */
|
|
mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
|
|
mei_hdr->host_addr = cl->host_client_id;
|
|
mei_hdr->me_addr = cl->me_client_id;
|
|
mei_hdr->length =
|
|
(*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
|
|
mei_hdr->msg_complete = 0;
|
|
mei_hdr->reserved = 0;
|
|
|
|
(*slots) -= (sizeof(struct mei_msg_hdr) +
|
|
mei_hdr->length + 3) / 4;
|
|
if (!mei_write_message(dev, mei_hdr,
|
|
(unsigned char *)
|
|
(cb_pos->request_buffer.data +
|
|
cb_pos->information),
|
|
mei_hdr->length)) {
|
|
cl->status = -ENODEV;
|
|
list_move_tail(&cb_pos->cb_list,
|
|
&cmpl_list->mei_cb.cb_list);
|
|
return -ENODEV;
|
|
} else {
|
|
cb_pos->information += mei_hdr->length;
|
|
dev_dbg(&dev->pdev->dev,
|
|
"cb_pos->request_buffer.size =%d"
|
|
" mei_hdr->msg_complete = %d\n",
|
|
cb_pos->request_buffer.size,
|
|
mei_hdr->msg_complete);
|
|
dev_dbg(&dev->pdev->dev, "cb_pos->information =%lu\n",
|
|
cb_pos->information);
|
|
dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n",
|
|
mei_hdr->length);
|
|
}
|
|
return -EMSGSIZE;
|
|
} else {
|
|
return -EBADMSG;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* _mei_irq_thread_cmpl_iamthif - processes completed iamthif operation.
|
|
*
|
|
* @dev: the device structure.
|
|
* @slots: free slots.
|
|
* @cb_pos: callback block.
|
|
* @cl: private data of the file object.
|
|
* @cmpl_list: complete list.
|
|
*
|
|
* returns 0, OK; otherwise, error.
|
|
*/
|
|
static int _mei_irq_thread_cmpl_iamthif(struct mei_device *dev, s32 *slots,
|
|
struct mei_cl_cb *cb_pos,
|
|
struct mei_cl *cl,
|
|
struct mei_io_list *cmpl_list)
|
|
{
|
|
struct mei_msg_hdr *mei_hdr;
|
|
|
|
if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
|
|
dev->iamthif_msg_buf_size -
|
|
dev->iamthif_msg_buf_index)) {
|
|
mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
|
|
mei_hdr->host_addr = cl->host_client_id;
|
|
mei_hdr->me_addr = cl->me_client_id;
|
|
mei_hdr->length = dev->iamthif_msg_buf_size -
|
|
dev->iamthif_msg_buf_index;
|
|
mei_hdr->msg_complete = 1;
|
|
mei_hdr->reserved = 0;
|
|
|
|
*slots -= (sizeof(struct mei_msg_hdr) +
|
|
mei_hdr->length + 3) / 4;
|
|
|
|
if (!mei_write_message(dev, mei_hdr,
|
|
(dev->iamthif_msg_buf +
|
|
dev->iamthif_msg_buf_index),
|
|
mei_hdr->length)) {
|
|
dev->iamthif_state = MEI_IAMTHIF_IDLE;
|
|
cl->status = -ENODEV;
|
|
list_del(&cb_pos->cb_list);
|
|
return -ENODEV;
|
|
} else {
|
|
if (mei_flow_ctrl_reduce(dev, cl))
|
|
return -ENODEV;
|
|
dev->iamthif_msg_buf_index += mei_hdr->length;
|
|
cb_pos->information = dev->iamthif_msg_buf_index;
|
|
cl->status = 0;
|
|
dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
|
|
dev->iamthif_flow_control_pending = 1;
|
|
/* save iamthif cb sent to amthi client */
|
|
dev->iamthif_current_cb = cb_pos;
|
|
list_move_tail(&cb_pos->cb_list,
|
|
&dev->write_waiting_list.mei_cb.cb_list);
|
|
|
|
}
|
|
} else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
|
|
/* buffer is still empty */
|
|
mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
|
|
mei_hdr->host_addr = cl->host_client_id;
|
|
mei_hdr->me_addr = cl->me_client_id;
|
|
mei_hdr->length =
|
|
(*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
|
|
mei_hdr->msg_complete = 0;
|
|
mei_hdr->reserved = 0;
|
|
|
|
*slots -= (sizeof(struct mei_msg_hdr) +
|
|
mei_hdr->length + 3) / 4;
|
|
|
|
if (!mei_write_message(dev, mei_hdr,
|
|
(dev->iamthif_msg_buf +
|
|
dev->iamthif_msg_buf_index),
|
|
mei_hdr->length)) {
|
|
cl->status = -ENODEV;
|
|
list_del(&cb_pos->cb_list);
|
|
} else {
|
|
dev->iamthif_msg_buf_index += mei_hdr->length;
|
|
}
|
|
return -EMSGSIZE;
|
|
} else {
|
|
return -EBADMSG;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* mei_irq_thread_read_handler - bottom half read routine after ISR to
|
|
* handle the read processing.
|
|
*
|
|
* @cmpl_list: An instance of our list structure
|
|
* @dev: the device structure
|
|
* @slots: slots to read.
|
|
*
|
|
* returns 0 on success, <0 on failure.
|
|
*/
|
|
static int mei_irq_thread_read_handler(struct mei_io_list *cmpl_list,
|
|
struct mei_device *dev,
|
|
s32 *slots)
|
|
{
|
|
struct mei_msg_hdr *mei_hdr;
|
|
struct mei_cl *cl_pos = NULL;
|
|
struct mei_cl *cl_next = NULL;
|
|
int ret = 0;
|
|
|
|
if (!dev->rd_msg_hdr) {
|
|
dev->rd_msg_hdr = mei_mecbrw_read(dev);
|
|
dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
|
|
(*slots)--;
|
|
dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
|
|
}
|
|
mei_hdr = (struct mei_msg_hdr *) &dev->rd_msg_hdr;
|
|
dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", mei_hdr->length);
|
|
|
|
if (mei_hdr->reserved || !dev->rd_msg_hdr) {
|
|
dev_dbg(&dev->pdev->dev, "corrupted message header.\n");
|
|
ret = -EBADMSG;
|
|
goto end;
|
|
}
|
|
|
|
if (mei_hdr->host_addr || mei_hdr->me_addr) {
|
|
list_for_each_entry_safe(cl_pos, cl_next,
|
|
&dev->file_list, link) {
|
|
dev_dbg(&dev->pdev->dev,
|
|
"list_for_each_entry_safe read host"
|
|
" client = %d, ME client = %d\n",
|
|
cl_pos->host_client_id,
|
|
cl_pos->me_client_id);
|
|
if (cl_pos->host_client_id == mei_hdr->host_addr &&
|
|
cl_pos->me_client_id == mei_hdr->me_addr)
|
|
break;
|
|
}
|
|
|
|
if (&cl_pos->link == &dev->file_list) {
|
|
dev_dbg(&dev->pdev->dev, "corrupted message header\n");
|
|
ret = -EBADMSG;
|
|
goto end;
|
|
}
|
|
}
|
|
if (((*slots) * sizeof(u32)) < mei_hdr->length) {
|
|
dev_dbg(&dev->pdev->dev,
|
|
"we can't read the message slots =%08x.\n",
|
|
*slots);
|
|
/* we can't read the message */
|
|
ret = -ERANGE;
|
|
goto end;
|
|
}
|
|
|
|
/* decide where to read the message too */
|
|
if (!mei_hdr->host_addr) {
|
|
dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_bus_message.\n");
|
|
mei_irq_thread_read_bus_message(dev, mei_hdr);
|
|
dev_dbg(&dev->pdev->dev, "end mei_irq_thread_read_bus_message.\n");
|
|
} else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
|
|
(MEI_FILE_CONNECTED == dev->iamthif_cl.state) &&
|
|
(dev->iamthif_state == MEI_IAMTHIF_READING)) {
|
|
dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
|
|
dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n",
|
|
mei_hdr->length);
|
|
ret = mei_irq_thread_read_amthi_message(cmpl_list,
|
|
dev, mei_hdr);
|
|
if (ret)
|
|
goto end;
|
|
|
|
} else {
|
|
dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n");
|
|
ret = mei_irq_thread_read_client_message(cmpl_list,
|
|
dev, mei_hdr);
|
|
if (ret)
|
|
goto end;
|
|
|
|
}
|
|
|
|
/* reset the number of slots and header */
|
|
*slots = mei_count_full_read_slots(dev);
|
|
dev->rd_msg_hdr = 0;
|
|
|
|
if (*slots == -EOVERFLOW) {
|
|
/* overflow - reset */
|
|
dev_dbg(&dev->pdev->dev, "resetting due to slots overflow.\n");
|
|
/* set the event since message has been read */
|
|
ret = -ERANGE;
|
|
goto end;
|
|
}
|
|
end:
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* mei_irq_thread_write_handler - bottom half write routine after
|
|
* ISR to handle the write processing.
|
|
*
|
|
* @cmpl_list: An instance of our list structure
|
|
* @dev: the device structure
|
|
* @slots: slots to write.
|
|
*
|
|
* returns 0 on success, <0 on failure.
|
|
*/
|
|
static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
|
|
struct mei_device *dev,
|
|
s32 *slots)
|
|
{
|
|
|
|
struct mei_cl *cl;
|
|
struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
|
|
struct mei_io_list *list;
|
|
int ret;
|
|
|
|
if (!mei_host_buffer_is_empty(dev)) {
|
|
dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n");
|
|
return 0;
|
|
}
|
|
dev->write_hang = -1;
|
|
*slots = mei_count_empty_write_slots(dev);
|
|
/* complete all waiting for write CB */
|
|
dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n");
|
|
|
|
list = &dev->write_waiting_list;
|
|
if (!list->status && !list_empty(&list->mei_cb.cb_list)) {
|
|
list_for_each_entry_safe(cb_pos, cb_next,
|
|
&list->mei_cb.cb_list, cb_list) {
|
|
cl = (struct mei_cl *)cb_pos->file_private;
|
|
if (cl) {
|
|
cl->status = 0;
|
|
list_del(&cb_pos->cb_list);
|
|
if (MEI_WRITING == cl->writing_state &&
|
|
(cb_pos->major_file_operations ==
|
|
MEI_WRITE) &&
|
|
(cl != &dev->iamthif_cl)) {
|
|
dev_dbg(&dev->pdev->dev,
|
|
"MEI WRITE COMPLETE\n");
|
|
cl->writing_state =
|
|
MEI_WRITE_COMPLETE;
|
|
list_add_tail(&cb_pos->cb_list,
|
|
&cmpl_list->mei_cb.cb_list);
|
|
}
|
|
if (cl == &dev->iamthif_cl) {
|
|
dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n");
|
|
if (dev->iamthif_flow_control_pending) {
|
|
ret =
|
|
_mei_irq_thread_iamthif_read(
|
|
dev, slots);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
if (dev->stop && !dev->wd_pending) {
|
|
dev->wd_stopped = 1;
|
|
wake_up_interruptible(&dev->wait_stop_wd);
|
|
return 0;
|
|
}
|
|
|
|
if (dev->extra_write_index) {
|
|
dev_dbg(&dev->pdev->dev, "extra_write_index =%d.\n",
|
|
dev->extra_write_index);
|
|
mei_write_message(dev,
|
|
(struct mei_msg_hdr *) &dev->ext_msg_buf[0],
|
|
(unsigned char *) &dev->ext_msg_buf[1],
|
|
(dev->extra_write_index - 1) * sizeof(u32));
|
|
*slots -= dev->extra_write_index;
|
|
dev->extra_write_index = 0;
|
|
}
|
|
if (dev->mei_state == MEI_ENABLED) {
|
|
if (dev->wd_pending &&
|
|
mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) {
|
|
if (mei_wd_send(dev))
|
|
dev_dbg(&dev->pdev->dev, "wd send failed.\n");
|
|
else
|
|
if (mei_flow_ctrl_reduce(dev, &dev->wd_cl))
|
|
return -ENODEV;
|
|
|
|
dev->wd_pending = 0;
|
|
|
|
if (dev->wd_timeout) {
|
|
*slots -= (sizeof(struct mei_msg_hdr) +
|
|
MEI_START_WD_DATA_SIZE + 3) / 4;
|
|
dev->wd_due_counter = 2;
|
|
} else {
|
|
*slots -= (sizeof(struct mei_msg_hdr) +
|
|
MEI_WD_PARAMS_SIZE + 3) / 4;
|
|
dev->wd_due_counter = 0;
|
|
}
|
|
|
|
}
|
|
}
|
|
if (dev->stop)
|
|
return ~ENODEV;
|
|
|
|
/* complete control write list CB */
|
|
if (!dev->ctrl_wr_list.status) {
|
|
/* complete control write list CB */
|
|
dev_dbg(&dev->pdev->dev, "complete control write list cb.\n");
|
|
list_for_each_entry_safe(cb_pos, cb_next,
|
|
&dev->ctrl_wr_list.mei_cb.cb_list, cb_list) {
|
|
cl = (struct mei_cl *)
|
|
cb_pos->file_private;
|
|
if (!cl) {
|
|
list_del(&cb_pos->cb_list);
|
|
return -ENODEV;
|
|
}
|
|
switch (cb_pos->major_file_operations) {
|
|
case MEI_CLOSE:
|
|
/* send disconnect message */
|
|
ret = _mei_irq_thread_close(dev, slots,
|
|
cb_pos, cl, cmpl_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
break;
|
|
case MEI_READ:
|
|
/* send flow control message */
|
|
ret = _mei_irq_thread_read(dev, slots,
|
|
cb_pos, cl, cmpl_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
break;
|
|
case MEI_IOCTL:
|
|
/* connect message */
|
|
if (!mei_other_client_is_connecting(dev,
|
|
cl))
|
|
continue;
|
|
ret = _mei_irq_thread_ioctl(dev, slots,
|
|
cb_pos, cl, cmpl_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
break;
|
|
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
}
|
|
}
|
|
/* complete write list CB */
|
|
if (!dev->write_list.status &&
|
|
!list_empty(&dev->write_list.mei_cb.cb_list)) {
|
|
dev_dbg(&dev->pdev->dev, "complete write list cb.\n");
|
|
list_for_each_entry_safe(cb_pos, cb_next,
|
|
&dev->write_list.mei_cb.cb_list, cb_list) {
|
|
cl = (struct mei_cl *)cb_pos->file_private;
|
|
|
|
if (cl) {
|
|
if (cl != &dev->iamthif_cl) {
|
|
if (!mei_flow_ctrl_creds(dev,
|
|
cl)) {
|
|
dev_dbg(&dev->pdev->dev,
|
|
"No flow control"
|
|
" credentials for client"
|
|
" %d, not sending.\n",
|
|
cl->host_client_id);
|
|
continue;
|
|
}
|
|
ret = _mei_irq_thread_cmpl(dev, slots,
|
|
cb_pos,
|
|
cl, cmpl_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
} else if (cl == &dev->iamthif_cl) {
|
|
/* IAMTHIF IOCTL */
|
|
dev_dbg(&dev->pdev->dev, "complete amthi write cb.\n");
|
|
if (!mei_flow_ctrl_creds(dev,
|
|
cl)) {
|
|
dev_dbg(&dev->pdev->dev,
|
|
"No flow control"
|
|
" credentials for amthi"
|
|
" client %d.\n",
|
|
cl->host_client_id);
|
|
continue;
|
|
}
|
|
ret = _mei_irq_thread_cmpl_iamthif(dev,
|
|
slots,
|
|
cb_pos,
|
|
cl,
|
|
cmpl_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* mei_timer - timer function.
|
|
*
|
|
* @work: pointer to the work_struct structure
|
|
*
|
|
* NOTE: This function is called by timer interrupt work
|
|
*/
|
|
void mei_wd_timer(struct work_struct *work)
|
|
{
|
|
unsigned long timeout;
|
|
struct mei_cl *cl_pos = NULL;
|
|
struct mei_cl *cl_next = NULL;
|
|
struct list_head *amthi_complete_list = NULL;
|
|
struct mei_cl_cb *cb_pos = NULL;
|
|
struct mei_cl_cb *cb_next = NULL;
|
|
|
|
struct mei_device *dev = container_of(work,
|
|
struct mei_device, wd_work.work);
|
|
|
|
|
|
mutex_lock(&dev->device_lock);
|
|
if (dev->mei_state != MEI_ENABLED) {
|
|
if (dev->mei_state == MEI_INIT_CLIENTS) {
|
|
if (dev->init_clients_timer) {
|
|
if (--dev->init_clients_timer == 0) {
|
|
dev_dbg(&dev->pdev->dev, "IMEI reset due to init clients timeout ,init clients state = %d.\n",
|
|
dev->init_clients_state);
|
|
mei_reset(dev, 1);
|
|
}
|
|
}
|
|
}
|
|
goto out;
|
|
}
|
|
/*** connect/disconnect timeouts ***/
|
|
list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
|
|
if (cl_pos->timer_count) {
|
|
if (--cl_pos->timer_count == 0) {
|
|
dev_dbg(&dev->pdev->dev, "HECI reset due to connect/disconnect timeout.\n");
|
|
mei_reset(dev, 1);
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (dev->wd_cl.state != MEI_FILE_CONNECTED)
|
|
goto out;
|
|
|
|
/* Watchdog */
|
|
if (dev->wd_due_counter && !dev->wd_bypass) {
|
|
if (--dev->wd_due_counter == 0) {
|
|
if (dev->mei_host_buffer_is_empty &&
|
|
mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) {
|
|
dev->mei_host_buffer_is_empty = 0;
|
|
dev_dbg(&dev->pdev->dev, "send watchdog.\n");
|
|
|
|
if (mei_wd_send(dev))
|
|
dev_dbg(&dev->pdev->dev, "wd send failed.\n");
|
|
else
|
|
if (mei_flow_ctrl_reduce(dev, &dev->wd_cl))
|
|
goto out;
|
|
|
|
if (dev->wd_timeout)
|
|
dev->wd_due_counter = 2;
|
|
else
|
|
dev->wd_due_counter = 0;
|
|
|
|
} else
|
|
dev->wd_pending = 1;
|
|
|
|
}
|
|
}
|
|
if (dev->iamthif_stall_timer) {
|
|
if (--dev->iamthif_stall_timer == 0) {
|
|
dev_dbg(&dev->pdev->dev, "reseting because of hang to amthi.\n");
|
|
mei_reset(dev, 1);
|
|
dev->iamthif_msg_buf_size = 0;
|
|
dev->iamthif_msg_buf_index = 0;
|
|
dev->iamthif_canceled = 0;
|
|
dev->iamthif_ioctl = 1;
|
|
dev->iamthif_state = MEI_IAMTHIF_IDLE;
|
|
dev->iamthif_timer = 0;
|
|
|
|
if (dev->iamthif_current_cb)
|
|
mei_free_cb_private(dev->iamthif_current_cb);
|
|
|
|
dev->iamthif_file_object = NULL;
|
|
dev->iamthif_current_cb = NULL;
|
|
run_next_iamthif_cmd(dev);
|
|
}
|
|
}
|
|
|
|
if (dev->iamthif_timer) {
|
|
|
|
timeout = dev->iamthif_timer +
|
|
msecs_to_jiffies(IAMTHIF_READ_TIMER);
|
|
|
|
dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n",
|
|
dev->iamthif_timer);
|
|
dev_dbg(&dev->pdev->dev, "timeout = %ld\n", timeout);
|
|
dev_dbg(&dev->pdev->dev, "jiffies = %ld\n", jiffies);
|
|
if (time_after(jiffies, timeout)) {
|
|
/*
|
|
* User didn't read the AMTHI data on time (15sec)
|
|
* freeing AMTHI for other requests
|
|
*/
|
|
|
|
dev_dbg(&dev->pdev->dev, "freeing AMTHI for other requests\n");
|
|
|
|
amthi_complete_list = &dev->amthi_read_complete_list.
|
|
mei_cb.cb_list;
|
|
|
|
if (!list_empty(amthi_complete_list)) {
|
|
|
|
list_for_each_entry_safe(cb_pos, cb_next,
|
|
amthi_complete_list,
|
|
cb_list) {
|
|
|
|
cl_pos = cb_pos->file_object->private_data;
|
|
|
|
/* Finding the AMTHI entry. */
|
|
if (cl_pos == &dev->iamthif_cl)
|
|
list_del(&cb_pos->cb_list);
|
|
}
|
|
}
|
|
if (dev->iamthif_current_cb)
|
|
mei_free_cb_private(dev->iamthif_current_cb);
|
|
|
|
dev->iamthif_file_object->private_data = NULL;
|
|
dev->iamthif_file_object = NULL;
|
|
dev->iamthif_current_cb = NULL;
|
|
dev->iamthif_timer = 0;
|
|
run_next_iamthif_cmd(dev);
|
|
|
|
}
|
|
}
|
|
out:
|
|
schedule_delayed_work(&dev->wd_work, 2 * HZ);
|
|
mutex_unlock(&dev->device_lock);
|
|
}
|
|
|
|
/**
|
|
* mei_interrupt_thread_handler - function called after ISR to handle the interrupt
|
|
* processing.
|
|
*
|
|
* @irq: The irq number
|
|
* @dev_id: pointer to the device structure
|
|
*
|
|
* returns irqreturn_t
|
|
*
|
|
*/
|
|
irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id)
|
|
{
|
|
struct mei_device *dev = (struct mei_device *) dev_id;
|
|
struct mei_io_list complete_list;
|
|
struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
|
|
struct mei_cl *cl;
|
|
s32 slots;
|
|
int rets;
|
|
bool bus_message_received;
|
|
|
|
|
|
dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n");
|
|
/* initialize our complete list */
|
|
mutex_lock(&dev->device_lock);
|
|
mei_initialize_list(&complete_list, dev);
|
|
dev->host_hw_state = mei_hcsr_read(dev);
|
|
dev->me_hw_state = mei_mecsr_read(dev);
|
|
|
|
/* check if ME wants a reset */
|
|
if ((dev->me_hw_state & ME_RDY_HRA) == 0 &&
|
|
dev->mei_state != MEI_RESETING &&
|
|
dev->mei_state != MEI_INITIALIZING) {
|
|
dev_dbg(&dev->pdev->dev, "FW not ready.\n");
|
|
mei_reset(dev, 1);
|
|
mutex_unlock(&dev->device_lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* check if we need to start the dev */
|
|
if ((dev->host_hw_state & H_RDY) == 0) {
|
|
if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
|
|
dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");
|
|
dev->host_hw_state |= (H_IE | H_IG | H_RDY);
|
|
mei_hcsr_set(dev);
|
|
dev->mei_state = MEI_INIT_CLIENTS;
|
|
dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
|
|
/* link is established
|
|
* start sending messages.
|
|
*/
|
|
host_start_message(dev);
|
|
mutex_unlock(&dev->device_lock);
|
|
return IRQ_HANDLED;
|
|
} else {
|
|
dev_dbg(&dev->pdev->dev, "FW not ready.\n");
|
|
mutex_unlock(&dev->device_lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
}
|
|
/* check slots avalable for reading */
|
|
slots = mei_count_full_read_slots(dev);
|
|
dev_dbg(&dev->pdev->dev, "slots =%08x extra_write_index =%08x.\n",
|
|
slots, dev->extra_write_index);
|
|
while (slots > 0 && !dev->extra_write_index) {
|
|
dev_dbg(&dev->pdev->dev, "slots =%08x extra_write_index =%08x.\n",
|
|
slots, dev->extra_write_index);
|
|
dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_handler.\n");
|
|
rets = mei_irq_thread_read_handler(&complete_list, dev, &slots);
|
|
if (rets)
|
|
goto end;
|
|
}
|
|
rets = mei_irq_thread_write_handler(&complete_list, dev, &slots);
|
|
end:
|
|
dev_dbg(&dev->pdev->dev, "end of bottom half function.\n");
|
|
dev->host_hw_state = mei_hcsr_read(dev);
|
|
dev->mei_host_buffer_is_empty = mei_host_buffer_is_empty(dev);
|
|
|
|
bus_message_received = false;
|
|
if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
|
|
dev_dbg(&dev->pdev->dev, "received waiting bus message\n");
|
|
bus_message_received = true;
|
|
}
|
|
mutex_unlock(&dev->device_lock);
|
|
if (bus_message_received) {
|
|
dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n");
|
|
wake_up_interruptible(&dev->wait_recvd_msg);
|
|
bus_message_received = false;
|
|
}
|
|
if (complete_list.status || list_empty(&complete_list.mei_cb.cb_list))
|
|
return IRQ_HANDLED;
|
|
|
|
|
|
list_for_each_entry_safe(cb_pos, cb_next,
|
|
&complete_list.mei_cb.cb_list, cb_list) {
|
|
cl = (struct mei_cl *)cb_pos->file_private;
|
|
list_del(&cb_pos->cb_list);
|
|
if (cl) {
|
|
if (cl != &dev->iamthif_cl) {
|
|
dev_dbg(&dev->pdev->dev, "completing call back.\n");
|
|
_mei_cmpl(cl, cb_pos);
|
|
cb_pos = NULL;
|
|
} else if (cl == &dev->iamthif_cl) {
|
|
_mei_cmpl_iamthif(dev, cb_pos);
|
|
}
|
|
}
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|