mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 12:24:54 +07:00
827eef51f8
We add struct mei_hw_ops to virtualize access to hw specific configurations. This allows us to separate the compilation of the ME interface from the ME hardware specifics Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
778 lines
20 KiB
C
778 lines
20 KiB
C
/*
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*
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* Intel Management Engine Interface (Intel MEI) Linux driver
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* Copyright (c) 2003-2012, 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 <linux/mei.h>
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#include "mei_dev.h"
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#include "hbm.h"
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#include "hw-me.h"
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#include "client.h"
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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->fop_type == MEI_FOP_WRITE) {
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mei_io_cb_free(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->fop_type == MEI_FOP_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_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_cl_cb *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 = NULL;
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dev_dbg(&dev->pdev->dev, "start client msg\n");
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if (list_empty(&dev->read_list.list))
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goto quit;
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list_for_each_entry_safe(cb_pos, cb_next, &dev->read_list.list, list) {
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cl = cb_pos->cl;
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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 = cb_pos->response_buffer.data + cb_pos->buf_idx;
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if (cb_pos->response_buffer.size <
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mei_hdr->length + cb_pos->buf_idx) {
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dev_dbg(&dev->pdev->dev, "message overflow.\n");
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list_del(&cb_pos->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->buf_idx += 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->list);
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dev_dbg(&dev->pdev->dev,
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"completed read H cl = %d, ME cl = %d, 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->buf_idx);
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list_add_tail(&cb_pos->list,
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&complete_list->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, dev->rd_msg_buf, mei_hdr->length);
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dev_dbg(&dev->pdev->dev, "discarding message " MEI_HDR_FMT "\n",
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MEI_HDR_PRM(mei_hdr));
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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_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_cl_cb *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_connect_request)))
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return -EBADMSG;
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*slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
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if (mei_hbm_cl_disconnect_req(dev, cl)) {
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cl->status = 0;
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cb_pos->buf_idx = 0;
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list_move_tail(&cb_pos->list, &cmpl_list->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->buf_idx = 0;
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list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list);
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cl->timer_count = MEI_CONNECT_TIMEOUT;
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}
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return 0;
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}
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/**
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* _mei_hb_read - processes read 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_read(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_cl_cb *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_flow_control))) {
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/* return the cancel routine */
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list_del(&cb_pos->list);
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return -EBADMSG;
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}
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*slots -= mei_data2slots(sizeof(struct hbm_flow_control));
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if (mei_hbm_cl_flow_control_req(dev, cl)) {
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cl->status = -ENODEV;
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cb_pos->buf_idx = 0;
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list_move_tail(&cb_pos->list, &cmpl_list->list);
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return -ENODEV;
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}
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list_move_tail(&cb_pos->list, &dev->read_list.list);
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return 0;
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}
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/**
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* _mei_irq_thread_ioctl - processes ioctl 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_ioctl(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_cl_cb *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_connect_request))) {
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/* return the cancel routine */
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list_del(&cb_pos->list);
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return -EBADMSG;
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}
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cl->state = MEI_FILE_CONNECTING;
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*slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
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if (mei_hbm_cl_connect_req(dev, cl)) {
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cl->status = -ENODEV;
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cb_pos->buf_idx = 0;
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list_del(&cb_pos->list);
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return -ENODEV;
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} else {
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list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list);
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cl->timer_count = MEI_CONNECT_TIMEOUT;
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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_write_complete - write messages to device.
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*
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* @dev: the device structure.
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* @slots: free slots.
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* @cb: callback block.
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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_write_complete(struct mei_device *dev, s32 *slots,
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struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list)
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{
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struct mei_msg_hdr mei_hdr;
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struct mei_cl *cl = cb->cl;
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size_t len = cb->request_buffer.size - cb->buf_idx;
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size_t msg_slots = mei_data2slots(len);
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mei_hdr.host_addr = cl->host_client_id;
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mei_hdr.me_addr = cl->me_client_id;
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mei_hdr.reserved = 0;
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if (*slots >= msg_slots) {
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mei_hdr.length = len;
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mei_hdr.msg_complete = 1;
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/* Split the message only if we can write the whole host buffer */
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} else if (*slots == dev->hbuf_depth) {
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msg_slots = *slots;
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len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
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mei_hdr.length = len;
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mei_hdr.msg_complete = 0;
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} else {
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/* wait for next time the host buffer is empty */
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return 0;
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}
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dev_dbg(&dev->pdev->dev, "buf: size = %d idx = %lu\n",
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cb->request_buffer.size, cb->buf_idx);
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dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr));
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*slots -= msg_slots;
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if (mei_write_message(dev, &mei_hdr,
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cb->request_buffer.data + cb->buf_idx)) {
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cl->status = -ENODEV;
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list_move_tail(&cb->list, &cmpl_list->list);
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return -ENODEV;
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}
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if (mei_cl_flow_ctrl_reduce(cl))
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return -ENODEV;
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cl->status = 0;
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cb->buf_idx += mei_hdr.length;
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if (mei_hdr.msg_complete)
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list_move_tail(&cb->list, &dev->write_waiting_list.list);
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return 0;
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}
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/**
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* mei_irq_thread_read_handler - bottom half read routine after ISR to
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* handle the read processing.
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*
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* @cmpl_list: An instance of our list structure
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* @dev: the device structure
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* @slots: slots to read.
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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_handler(struct mei_cl_cb *cmpl_list,
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struct mei_device *dev,
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s32 *slots)
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{
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struct mei_msg_hdr *mei_hdr;
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struct mei_cl *cl_pos = NULL;
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struct mei_cl *cl_next = NULL;
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int ret = 0;
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if (!dev->rd_msg_hdr) {
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dev->rd_msg_hdr = mei_read_hdr(dev);
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dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
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(*slots)--;
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dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
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}
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mei_hdr = (struct mei_msg_hdr *) &dev->rd_msg_hdr;
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dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
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if (mei_hdr->reserved || !dev->rd_msg_hdr) {
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dev_dbg(&dev->pdev->dev, "corrupted message header.\n");
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ret = -EBADMSG;
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goto end;
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}
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if (mei_hdr->host_addr || mei_hdr->me_addr) {
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list_for_each_entry_safe(cl_pos, cl_next,
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&dev->file_list, link) {
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dev_dbg(&dev->pdev->dev,
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"list_for_each_entry_safe read host"
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" client = %d, ME client = %d\n",
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cl_pos->host_client_id,
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cl_pos->me_client_id);
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if (cl_pos->host_client_id == mei_hdr->host_addr &&
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cl_pos->me_client_id == mei_hdr->me_addr)
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break;
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}
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if (&cl_pos->link == &dev->file_list) {
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dev_dbg(&dev->pdev->dev, "corrupted message header\n");
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ret = -EBADMSG;
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goto end;
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}
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}
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if (((*slots) * sizeof(u32)) < mei_hdr->length) {
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dev_dbg(&dev->pdev->dev,
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"we can't read the message slots =%08x.\n",
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*slots);
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/* we can't read the message */
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ret = -ERANGE;
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goto end;
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}
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/* decide where to read the message too */
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if (!mei_hdr->host_addr) {
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dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_bus_message.\n");
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mei_hbm_dispatch(dev, mei_hdr);
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dev_dbg(&dev->pdev->dev, "end mei_irq_thread_read_bus_message.\n");
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} else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
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(MEI_FILE_CONNECTED == dev->iamthif_cl.state) &&
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(dev->iamthif_state == MEI_IAMTHIF_READING)) {
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dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
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dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
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ret = mei_amthif_irq_read_message(cmpl_list, dev, mei_hdr);
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if (ret)
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goto end;
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} else {
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dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n");
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ret = mei_irq_thread_read_client_message(cmpl_list,
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dev, mei_hdr);
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if (ret)
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goto end;
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}
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/* reset the number of slots and header */
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*slots = mei_count_full_read_slots(dev);
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dev->rd_msg_hdr = 0;
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if (*slots == -EOVERFLOW) {
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/* overflow - reset */
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dev_dbg(&dev->pdev->dev, "resetting due to slots overflow.\n");
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/* set the event since message has been read */
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ret = -ERANGE;
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goto end;
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}
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end:
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return ret;
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}
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/**
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* mei_irq_thread_write_handler - bottom half write routine after
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* ISR to handle the write processing.
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*
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* @dev: the device structure
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* @cmpl_list: An instance of our list structure
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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_write_handler(struct mei_device *dev,
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struct mei_cl_cb *cmpl_list)
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{
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struct mei_cl *cl;
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struct mei_cl_cb *pos = NULL, *next = NULL;
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struct mei_cl_cb *list;
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s32 slots;
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int ret;
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if (!mei_hbuf_is_ready(dev)) {
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dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n");
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return 0;
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}
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slots = mei_hbuf_empty_slots(dev);
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if (slots <= 0)
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return -EMSGSIZE;
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/* complete all waiting for write CB */
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dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n");
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list = &dev->write_waiting_list;
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list_for_each_entry_safe(pos, next, &list->list, list) {
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cl = pos->cl;
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if (cl == NULL)
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continue;
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cl->status = 0;
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list_del(&pos->list);
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if (MEI_WRITING == cl->writing_state &&
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pos->fop_type == MEI_FOP_WRITE &&
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cl != &dev->iamthif_cl) {
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dev_dbg(&dev->pdev->dev, "MEI WRITE COMPLETE\n");
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cl->writing_state = MEI_WRITE_COMPLETE;
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list_add_tail(&pos->list, &cmpl_list->list);
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}
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if (cl == &dev->iamthif_cl) {
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dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n");
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if (dev->iamthif_flow_control_pending) {
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ret = mei_amthif_irq_read(dev, &slots);
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if (ret)
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return ret;
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}
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}
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}
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if (dev->wd_state == MEI_WD_STOPPING) {
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dev->wd_state = MEI_WD_IDLE;
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wake_up_interruptible(&dev->wait_stop_wd);
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}
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if (dev->wr_ext_msg.hdr.length) {
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mei_write_message(dev, &dev->wr_ext_msg.hdr,
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dev->wr_ext_msg.data);
|
|
slots -= mei_data2slots(dev->wr_ext_msg.hdr.length);
|
|
dev->wr_ext_msg.hdr.length = 0;
|
|
}
|
|
if (dev->dev_state == MEI_DEV_ENABLED) {
|
|
if (dev->wd_pending &&
|
|
mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) {
|
|
if (mei_wd_send(dev))
|
|
dev_dbg(&dev->pdev->dev, "wd send failed.\n");
|
|
else if (mei_cl_flow_ctrl_reduce(&dev->wd_cl))
|
|
return -ENODEV;
|
|
|
|
dev->wd_pending = false;
|
|
|
|
if (dev->wd_state == MEI_WD_RUNNING)
|
|
slots -= mei_data2slots(MEI_WD_START_MSG_SIZE);
|
|
else
|
|
slots -= mei_data2slots(MEI_WD_STOP_MSG_SIZE);
|
|
}
|
|
}
|
|
|
|
/* complete control write list CB */
|
|
dev_dbg(&dev->pdev->dev, "complete control write list cb.\n");
|
|
list_for_each_entry_safe(pos, next, &dev->ctrl_wr_list.list, list) {
|
|
cl = pos->cl;
|
|
if (!cl) {
|
|
list_del(&pos->list);
|
|
return -ENODEV;
|
|
}
|
|
switch (pos->fop_type) {
|
|
case MEI_FOP_CLOSE:
|
|
/* send disconnect message */
|
|
ret = _mei_irq_thread_close(dev, &slots, pos,
|
|
cl, cmpl_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
break;
|
|
case MEI_FOP_READ:
|
|
/* send flow control message */
|
|
ret = _mei_irq_thread_read(dev, &slots, pos,
|
|
cl, cmpl_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
break;
|
|
case MEI_FOP_IOCTL:
|
|
/* connect message */
|
|
if (mei_cl_is_other_connecting(cl))
|
|
continue;
|
|
ret = _mei_irq_thread_ioctl(dev, &slots, pos,
|
|
cl, cmpl_list);
|
|
if (ret)
|
|
return ret;
|
|
|
|
break;
|
|
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
}
|
|
/* complete write list CB */
|
|
dev_dbg(&dev->pdev->dev, "complete write list cb.\n");
|
|
list_for_each_entry_safe(pos, next, &dev->write_list.list, list) {
|
|
cl = pos->cl;
|
|
if (cl == NULL)
|
|
continue;
|
|
if (mei_cl_flow_ctrl_creds(cl) <= 0) {
|
|
dev_dbg(&dev->pdev->dev,
|
|
"No flow control credentials for client %d, not sending.\n",
|
|
cl->host_client_id);
|
|
continue;
|
|
}
|
|
|
|
if (cl == &dev->iamthif_cl)
|
|
ret = mei_amthif_irq_write_complete(dev, &slots,
|
|
pos, cmpl_list);
|
|
else
|
|
ret = mei_irq_thread_write_complete(dev, &slots, pos,
|
|
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_timer(struct work_struct *work)
|
|
{
|
|
unsigned long timeout;
|
|
struct mei_cl *cl_pos = NULL;
|
|
struct mei_cl *cl_next = 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, timer_work.work);
|
|
|
|
|
|
mutex_lock(&dev->device_lock);
|
|
if (dev->dev_state != MEI_DEV_ENABLED) {
|
|
if (dev->dev_state == MEI_DEV_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->iamthif_stall_timer) {
|
|
if (--dev->iamthif_stall_timer == 0) {
|
|
dev_dbg(&dev->pdev->dev, "resetting 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 = false;
|
|
dev->iamthif_ioctl = true;
|
|
dev->iamthif_state = MEI_IAMTHIF_IDLE;
|
|
dev->iamthif_timer = 0;
|
|
|
|
mei_io_cb_free(dev->iamthif_current_cb);
|
|
dev->iamthif_current_cb = NULL;
|
|
|
|
dev->iamthif_file_object = NULL;
|
|
mei_amthif_run_next_cmd(dev);
|
|
}
|
|
}
|
|
|
|
if (dev->iamthif_timer) {
|
|
|
|
timeout = dev->iamthif_timer +
|
|
mei_secs_to_jiffies(MEI_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");
|
|
|
|
list_for_each_entry_safe(cb_pos, cb_next,
|
|
&dev->amthif_rd_complete_list.list, list) {
|
|
|
|
cl_pos = cb_pos->file_object->private_data;
|
|
|
|
/* Finding the AMTHI entry. */
|
|
if (cl_pos == &dev->iamthif_cl)
|
|
list_del(&cb_pos->list);
|
|
}
|
|
mei_io_cb_free(dev->iamthif_current_cb);
|
|
dev->iamthif_current_cb = NULL;
|
|
|
|
dev->iamthif_file_object->private_data = NULL;
|
|
dev->iamthif_file_object = NULL;
|
|
dev->iamthif_timer = 0;
|
|
mei_amthif_run_next_cmd(dev);
|
|
|
|
}
|
|
}
|
|
out:
|
|
schedule_delayed_work(&dev->timer_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_cl_cb 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_io_list_init(&complete_list);
|
|
|
|
/* Ack the interrupt here
|
|
* In case of MSI we don't go through the quick handler */
|
|
if (pci_dev_msi_enabled(dev->pdev))
|
|
mei_clear_interrupts(dev);
|
|
|
|
/* check if ME wants a reset */
|
|
if (!mei_hw_is_ready(dev) &&
|
|
dev->dev_state != MEI_DEV_RESETING &&
|
|
dev->dev_state != MEI_DEV_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 (!mei_host_is_ready(dev)) {
|
|
if (mei_hw_is_ready(dev)) {
|
|
dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");
|
|
|
|
mei_host_set_ready(dev);
|
|
|
|
dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
|
|
/* link is established * start sending messages. */
|
|
|
|
dev->dev_state = MEI_DEV_INIT_CLIENTS;
|
|
|
|
mei_hbm_start_req(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 available for reading */
|
|
slots = mei_count_full_read_slots(dev);
|
|
while (slots > 0) {
|
|
/* we have urgent data to send so break the read */
|
|
if (dev->wr_ext_msg.hdr.length)
|
|
break;
|
|
dev_dbg(&dev->pdev->dev, "slots =%08x\n", slots);
|
|
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(dev, &complete_list);
|
|
end:
|
|
dev_dbg(&dev->pdev->dev, "end of bottom half function.\n");
|
|
dev->mei_host_buffer_is_empty = mei_hbuf_is_ready(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 (list_empty(&complete_list.list))
|
|
return IRQ_HANDLED;
|
|
|
|
|
|
list_for_each_entry_safe(cb_pos, cb_next, &complete_list.list, list) {
|
|
cl = cb_pos->cl;
|
|
list_del(&cb_pos->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_amthif_complete(dev, cb_pos);
|
|
}
|
|
}
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|