mei: move host bus message handling to hbm.c
for sake of more layered design we move host bus message handling to the new hbm.c file Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
Greg Kroah-Hartman
parent
3a65dd4ea3
commit
bb1b0133b3
6 changed files with 456 additions and 419 deletions
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@ -4,6 +4,7 @@
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#
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obj-$(CONFIG_INTEL_MEI) += mei.o
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mei-objs := init.o
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mei-objs += hbm.o
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mei-objs += interrupt.o
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mei-objs += interface.o
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mei-objs += iorw.o
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440
drivers/misc/mei/hbm.c
Normal file
440
drivers/misc/mei/hbm.c
Normal file
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@ -0,0 +1,440 @@
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/*
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*
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* Intel Management Engine Interface (Intel MEI) Linux driver
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* Copyright (c) 2003-2012, 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/sched.h>
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#include <linux/wait.h>
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#include <linux/mei.h>
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#include "mei_dev.h"
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#include "interface.h"
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/**
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* host_start_message - mei host sends start message.
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*
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* @dev: the device structure
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*
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* returns none.
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*/
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void mei_host_start_message(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr;
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struct hbm_host_version_request *start_req;
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const size_t len = sizeof(struct hbm_host_version_request);
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mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
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/* host start message */
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start_req = (struct hbm_host_version_request *)&dev->wr_msg_buf[1];
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memset(start_req, 0, len);
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start_req->hbm_cmd = HOST_START_REQ_CMD;
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start_req->host_version.major_version = HBM_MAJOR_VERSION;
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start_req->host_version.minor_version = HBM_MINOR_VERSION;
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dev->recvd_msg = false;
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if (mei_write_message(dev, mei_hdr, (unsigned char *)start_req)) {
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dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n");
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dev->dev_state = MEI_DEV_RESETING;
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mei_reset(dev, 1);
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}
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dev->init_clients_state = MEI_START_MESSAGE;
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dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
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return ;
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}
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/**
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* host_enum_clients_message - host sends enumeration client request message.
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*
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* @dev: the device structure
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*
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* returns none.
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*/
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void mei_host_enum_clients_message(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr;
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struct hbm_host_enum_request *enum_req;
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const size_t len = sizeof(struct hbm_host_enum_request);
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/* enumerate clients */
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mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
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enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
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memset(enum_req, 0, sizeof(struct hbm_host_enum_request));
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enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
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if (mei_write_message(dev, mei_hdr, (unsigned char *)enum_req)) {
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dev->dev_state = MEI_DEV_RESETING;
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dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
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mei_reset(dev, 1);
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}
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dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE;
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dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
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return;
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}
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int mei_host_client_enumerate(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr;
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struct hbm_props_request *prop_req;
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const size_t len = sizeof(struct hbm_props_request);
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unsigned long next_client_index;
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u8 client_num;
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client_num = dev->me_client_presentation_num;
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next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
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dev->me_client_index);
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/* We got all client properties */
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if (next_client_index == MEI_CLIENTS_MAX) {
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schedule_work(&dev->init_work);
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return 0;
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}
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dev->me_clients[client_num].client_id = next_client_index;
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dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
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mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
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prop_req = (struct hbm_props_request *)&dev->wr_msg_buf[1];
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memset(prop_req, 0, sizeof(struct hbm_props_request));
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prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
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prop_req->address = next_client_index;
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if (mei_write_message(dev, mei_hdr, (unsigned char *) prop_req)) {
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dev->dev_state = MEI_DEV_RESETING;
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dev_err(&dev->pdev->dev, "Properties request command failed\n");
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mei_reset(dev, 1);
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return -EIO;
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}
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dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
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dev->me_client_index = next_client_index;
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return 0;
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}
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/**
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* mei_send_flow_control - sends flow control to fw.
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*
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* @dev: the device structure
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* @cl: private data of the file object
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*
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* This function returns -EIO on write failure
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*/
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int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl)
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{
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struct mei_msg_hdr *mei_hdr;
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struct hbm_flow_control *flow_ctrl;
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const size_t len = sizeof(struct hbm_flow_control);
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mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
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flow_ctrl = (struct hbm_flow_control *)&dev->wr_msg_buf[1];
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memset(flow_ctrl, 0, len);
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flow_ctrl->hbm_cmd = MEI_FLOW_CONTROL_CMD;
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flow_ctrl->host_addr = cl->host_client_id;
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flow_ctrl->me_addr = cl->me_client_id;
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/* FIXME: reserved !? */
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memset(flow_ctrl->reserved, 0, sizeof(flow_ctrl->reserved));
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dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n",
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cl->host_client_id, cl->me_client_id);
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return mei_write_message(dev, mei_hdr, (unsigned char *) flow_ctrl);
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}
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/**
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* mei_disconnect - sends disconnect message to fw.
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*
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* @dev: the device structure
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* @cl: private data of the file object
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*
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* This function returns -EIO on write failure
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*/
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int mei_disconnect(struct mei_device *dev, struct mei_cl *cl)
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{
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struct mei_msg_hdr *hdr;
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struct hbm_client_connect_request *req;
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const size_t len = sizeof(struct hbm_client_connect_request);
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hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
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req = (struct hbm_client_connect_request *)&dev->wr_msg_buf[1];
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memset(req, 0, len);
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req->hbm_cmd = CLIENT_DISCONNECT_REQ_CMD;
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req->host_addr = cl->host_client_id;
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req->me_addr = cl->me_client_id;
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req->reserved = 0;
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return mei_write_message(dev, hdr, (unsigned char *)req);
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}
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/**
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* mei_connect - sends connect message to fw.
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*
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* @dev: the device structure
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* @cl: private data of the file object
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*
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* This function returns -EIO on write failure
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*/
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int mei_connect(struct mei_device *dev, struct mei_cl *cl)
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{
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struct mei_msg_hdr *hdr;
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struct hbm_client_connect_request *req;
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const size_t len = sizeof(struct hbm_client_connect_request);
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hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
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req = (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
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req->hbm_cmd = CLIENT_CONNECT_REQ_CMD;
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req->host_addr = cl->host_client_id;
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req->me_addr = cl->me_client_id;
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req->reserved = 0;
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return mei_write_message(dev, hdr, (unsigned char *) req);
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}
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/**
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* same_disconn_addr - tells if they have the same address
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*
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* @file: private data of the file object.
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* @disconn: disconnection request.
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*
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* returns !=0, same; 0,not.
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*/
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static int same_disconn_addr(struct mei_cl *cl,
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struct hbm_client_connect_request *req)
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{
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return (cl->host_client_id == req->host_addr &&
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cl->me_client_id == req->me_addr);
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}
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/**
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* mei_client_disconnect_request - disconnects from request irq routine
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*
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* @dev: the device structure.
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* @disconnect_req: disconnect request bus message.
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*/
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static void mei_client_disconnect_request(struct mei_device *dev,
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struct hbm_client_connect_request *disconnect_req)
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{
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struct hbm_client_connect_response *disconnect_res;
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struct mei_cl *pos, *next;
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const size_t len = sizeof(struct hbm_client_connect_response);
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list_for_each_entry_safe(pos, next, &dev->file_list, link) {
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if (same_disconn_addr(pos, disconnect_req)) {
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dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n",
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disconnect_req->host_addr,
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disconnect_req->me_addr);
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pos->state = MEI_FILE_DISCONNECTED;
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pos->timer_count = 0;
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if (pos == &dev->wd_cl)
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dev->wd_pending = false;
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else if (pos == &dev->iamthif_cl)
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dev->iamthif_timer = 0;
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/* prepare disconnect response */
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(void)mei_hbm_hdr((u32 *)&dev->wr_ext_msg.hdr, len);
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disconnect_res =
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(struct hbm_client_connect_response *)
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&dev->wr_ext_msg.data;
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disconnect_res->hbm_cmd = CLIENT_DISCONNECT_RES_CMD;
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disconnect_res->host_addr = pos->host_client_id;
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disconnect_res->me_addr = pos->me_client_id;
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disconnect_res->status = 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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* mei_hbm_dispatch - bottom half read routine after ISR to
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* handle the read bus message cmd processing.
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*
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* @dev: the device structure
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* @mei_hdr: header of bus message
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*/
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void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
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{
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struct mei_bus_message *mei_msg;
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struct mei_me_client *me_client;
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struct hbm_host_version_response *version_res;
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struct hbm_client_connect_response *connect_res;
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struct hbm_client_connect_response *disconnect_res;
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struct hbm_client_connect_request *disconnect_req;
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struct hbm_flow_control *flow_control;
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struct hbm_props_response *props_res;
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struct hbm_host_enum_response *enum_res;
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struct hbm_host_stop_request *stop_req;
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/* read the message to our buffer */
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BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
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mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
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mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
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switch (mei_msg->hbm_cmd) {
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case HOST_START_RES_CMD:
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version_res = (struct hbm_host_version_response *)mei_msg;
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if (version_res->host_version_supported) {
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dev->version.major_version = HBM_MAJOR_VERSION;
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dev->version.minor_version = HBM_MINOR_VERSION;
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if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
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dev->init_clients_state == MEI_START_MESSAGE) {
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dev->init_clients_timer = 0;
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mei_host_enum_clients_message(dev);
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} else {
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dev->recvd_msg = false;
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dev_dbg(&dev->pdev->dev, "IMEI reset due to received host start response bus message.\n");
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mei_reset(dev, 1);
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return;
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}
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} else {
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u32 *buf = dev->wr_msg_buf;
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const size_t len = sizeof(struct hbm_host_stop_request);
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dev->version = version_res->me_max_version;
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/* send stop message */
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hdr = mei_hbm_hdr(&buf[0], len);
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stop_req = (struct hbm_host_stop_request *)&buf[1];
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memset(stop_req, 0, len);
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stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
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stop_req->reason = DRIVER_STOP_REQUEST;
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mei_write_message(dev, hdr, (unsigned char *)stop_req);
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dev_dbg(&dev->pdev->dev, "version mismatch.\n");
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return;
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}
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dev->recvd_msg = true;
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dev_dbg(&dev->pdev->dev, "host start response message received.\n");
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break;
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case CLIENT_CONNECT_RES_CMD:
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connect_res = (struct hbm_client_connect_response *) mei_msg;
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mei_client_connect_response(dev, connect_res);
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dev_dbg(&dev->pdev->dev, "client connect response message received.\n");
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wake_up(&dev->wait_recvd_msg);
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break;
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case CLIENT_DISCONNECT_RES_CMD:
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disconnect_res = (struct hbm_client_connect_response *) mei_msg;
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mei_client_disconnect_response(dev, disconnect_res);
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dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n");
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wake_up(&dev->wait_recvd_msg);
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break;
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case MEI_FLOW_CONTROL_CMD:
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flow_control = (struct hbm_flow_control *) mei_msg;
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mei_client_flow_control_response(dev, flow_control);
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dev_dbg(&dev->pdev->dev, "client flow control response message received.\n");
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break;
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case HOST_CLIENT_PROPERTIES_RES_CMD:
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props_res = (struct hbm_props_response *)mei_msg;
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me_client = &dev->me_clients[dev->me_client_presentation_num];
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if (props_res->status || !dev->me_clients) {
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dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n");
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mei_reset(dev, 1);
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return;
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}
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if (me_client->client_id != props_res->address) {
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dev_err(&dev->pdev->dev,
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"Host client properties reply mismatch\n");
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mei_reset(dev, 1);
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return;
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}
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if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
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dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) {
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dev_err(&dev->pdev->dev,
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"Unexpected client properties reply\n");
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mei_reset(dev, 1);
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return;
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}
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me_client->props = props_res->client_properties;
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dev->me_client_index++;
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dev->me_client_presentation_num++;
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mei_host_client_enumerate(dev);
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break;
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case HOST_ENUM_RES_CMD:
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enum_res = (struct hbm_host_enum_response *) mei_msg;
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memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
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if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
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dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) {
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dev->init_clients_timer = 0;
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dev->me_client_presentation_num = 0;
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dev->me_client_index = 0;
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mei_allocate_me_clients_storage(dev);
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dev->init_clients_state =
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MEI_CLIENT_PROPERTIES_MESSAGE;
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mei_host_client_enumerate(dev);
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} else {
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dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n");
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mei_reset(dev, 1);
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return;
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}
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break;
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case HOST_STOP_RES_CMD:
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dev->dev_state = MEI_DEV_DISABLED;
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dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n");
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mei_reset(dev, 1);
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break;
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case CLIENT_DISCONNECT_REQ_CMD:
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/* search for client */
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disconnect_req = (struct hbm_client_connect_request *)mei_msg;
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mei_client_disconnect_request(dev, disconnect_req);
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break;
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case ME_STOP_REQ_CMD:
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{
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/* prepare stop request: sent in next interrupt event */
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const size_t len = sizeof(struct hbm_host_stop_request);
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||||
hdr = mei_hbm_hdr((u32 *)&dev->wr_ext_msg.hdr, len);
|
||||
stop_req = (struct hbm_host_stop_request *)&dev->wr_ext_msg.data;
|
||||
memset(stop_req, 0, len);
|
||||
stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
|
||||
stop_req->reason = DRIVER_STOP_REQUEST;
|
||||
break;
|
||||
}
|
||||
default:
|
||||
BUG();
|
||||
break;
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -320,70 +320,6 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
|
|||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* host_start_message - mei host sends start message.
|
||||
*
|
||||
* @dev: the device structure
|
||||
*
|
||||
* returns none.
|
||||
*/
|
||||
void mei_host_start_message(struct mei_device *dev)
|
||||
{
|
||||
struct mei_msg_hdr *mei_hdr;
|
||||
struct hbm_host_version_request *start_req;
|
||||
const size_t len = sizeof(struct hbm_host_version_request);
|
||||
|
||||
mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
|
||||
|
||||
/* host start message */
|
||||
start_req = (struct hbm_host_version_request *)&dev->wr_msg_buf[1];
|
||||
memset(start_req, 0, len);
|
||||
start_req->hbm_cmd = HOST_START_REQ_CMD;
|
||||
start_req->host_version.major_version = HBM_MAJOR_VERSION;
|
||||
start_req->host_version.minor_version = HBM_MINOR_VERSION;
|
||||
|
||||
dev->recvd_msg = false;
|
||||
if (mei_write_message(dev, mei_hdr, (unsigned char *)start_req)) {
|
||||
dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n");
|
||||
dev->dev_state = MEI_DEV_RESETING;
|
||||
mei_reset(dev, 1);
|
||||
}
|
||||
dev->init_clients_state = MEI_START_MESSAGE;
|
||||
dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
|
||||
return ;
|
||||
}
|
||||
|
||||
/**
|
||||
* host_enum_clients_message - host sends enumeration client request message.
|
||||
*
|
||||
* @dev: the device structure
|
||||
*
|
||||
* returns none.
|
||||
*/
|
||||
void mei_host_enum_clients_message(struct mei_device *dev)
|
||||
{
|
||||
struct mei_msg_hdr *mei_hdr;
|
||||
struct hbm_host_enum_request *enum_req;
|
||||
const size_t len = sizeof(struct hbm_host_enum_request);
|
||||
/* enumerate clients */
|
||||
mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
|
||||
|
||||
enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
|
||||
memset(enum_req, 0, sizeof(struct hbm_host_enum_request));
|
||||
enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
|
||||
|
||||
if (mei_write_message(dev, mei_hdr, (unsigned char *)enum_req)) {
|
||||
dev->dev_state = MEI_DEV_RESETING;
|
||||
dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
|
||||
mei_reset(dev, 1);
|
||||
}
|
||||
dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE;
|
||||
dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* allocate_me_clients_storage - allocates storage for me clients
|
||||
*
|
||||
|
|
@ -457,53 +393,6 @@ void mei_host_client_init(struct work_struct *work)
|
|||
mutex_unlock(&dev->device_lock);
|
||||
}
|
||||
|
||||
int mei_host_client_enumerate(struct mei_device *dev)
|
||||
{
|
||||
|
||||
struct mei_msg_hdr *mei_hdr;
|
||||
struct hbm_props_request *prop_req;
|
||||
const size_t len = sizeof(struct hbm_props_request);
|
||||
unsigned long next_client_index;
|
||||
u8 client_num;
|
||||
|
||||
|
||||
client_num = dev->me_client_presentation_num;
|
||||
|
||||
next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
|
||||
dev->me_client_index);
|
||||
|
||||
/* We got all client properties */
|
||||
if (next_client_index == MEI_CLIENTS_MAX) {
|
||||
schedule_work(&dev->init_work);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
dev->me_clients[client_num].client_id = next_client_index;
|
||||
dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
|
||||
|
||||
mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
|
||||
prop_req = (struct hbm_props_request *)&dev->wr_msg_buf[1];
|
||||
|
||||
memset(prop_req, 0, sizeof(struct hbm_props_request));
|
||||
|
||||
|
||||
prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
|
||||
prop_req->address = next_client_index;
|
||||
|
||||
if (mei_write_message(dev, mei_hdr, (unsigned char *) prop_req)) {
|
||||
dev->dev_state = MEI_DEV_RESETING;
|
||||
dev_err(&dev->pdev->dev, "Properties request command failed\n");
|
||||
mei_reset(dev, 1);
|
||||
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
|
||||
dev->me_client_index = next_client_index;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_init_file_private - initializes private file structure.
|
||||
|
|
|
|||
|
|
@ -367,34 +367,6 @@ int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl)
|
|||
return -ENOENT;
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_send_flow_control - sends flow control to fw.
|
||||
*
|
||||
* @dev: the device structure
|
||||
* @cl: private data of the file object
|
||||
*
|
||||
* This function returns -EIO on write failure
|
||||
*/
|
||||
int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl)
|
||||
{
|
||||
struct mei_msg_hdr *mei_hdr;
|
||||
struct hbm_flow_control *flow_ctrl;
|
||||
const size_t len = sizeof(struct hbm_flow_control);
|
||||
|
||||
mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
|
||||
|
||||
flow_ctrl = (struct hbm_flow_control *)&dev->wr_msg_buf[1];
|
||||
memset(flow_ctrl, 0, len);
|
||||
flow_ctrl->hbm_cmd = MEI_FLOW_CONTROL_CMD;
|
||||
flow_ctrl->host_addr = cl->host_client_id;
|
||||
flow_ctrl->me_addr = cl->me_client_id;
|
||||
/* FIXME: reserved !? */
|
||||
memset(flow_ctrl->reserved, 0, sizeof(flow_ctrl->reserved));
|
||||
dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n",
|
||||
cl->host_client_id, cl->me_client_id);
|
||||
|
||||
return mei_write_message(dev, mei_hdr, (unsigned char *) flow_ctrl);
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_other_client_is_connecting - checks if other
|
||||
|
|
@ -421,53 +393,3 @@ int mei_other_client_is_connecting(struct mei_device *dev,
|
|||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_disconnect - sends disconnect message to fw.
|
||||
*
|
||||
* @dev: the device structure
|
||||
* @cl: private data of the file object
|
||||
*
|
||||
* This function returns -EIO on write failure
|
||||
*/
|
||||
int mei_disconnect(struct mei_device *dev, struct mei_cl *cl)
|
||||
{
|
||||
struct mei_msg_hdr *hdr;
|
||||
struct hbm_client_connect_request *req;
|
||||
const size_t len = sizeof(struct hbm_client_connect_request);
|
||||
|
||||
hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
|
||||
|
||||
req = (struct hbm_client_connect_request *)&dev->wr_msg_buf[1];
|
||||
memset(req, 0, len);
|
||||
req->hbm_cmd = CLIENT_DISCONNECT_REQ_CMD;
|
||||
req->host_addr = cl->host_client_id;
|
||||
req->me_addr = cl->me_client_id;
|
||||
req->reserved = 0;
|
||||
|
||||
return mei_write_message(dev, hdr, (unsigned char *)req);
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_connect - sends connect message to fw.
|
||||
*
|
||||
* @dev: the device structure
|
||||
* @cl: private data of the file object
|
||||
*
|
||||
* This function returns -EIO on write failure
|
||||
*/
|
||||
int mei_connect(struct mei_device *dev, struct mei_cl *cl)
|
||||
{
|
||||
struct mei_msg_hdr *hdr;
|
||||
struct hbm_client_connect_request *req;
|
||||
const size_t len = sizeof(struct hbm_client_connect_request);
|
||||
|
||||
hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
|
||||
|
||||
req = (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
|
||||
req->hbm_cmd = CLIENT_CONNECT_REQ_CMD;
|
||||
req->host_addr = cl->host_client_id;
|
||||
req->me_addr = cl->me_client_id;
|
||||
req->reserved = 0;
|
||||
|
||||
return mei_write_message(dev, hdr, (unsigned char *) req);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -208,7 +208,7 @@ static bool is_treat_specially_client(struct mei_cl *cl,
|
|||
* @dev: the device structure
|
||||
* @rs: connect response bus message
|
||||
*/
|
||||
static void mei_client_connect_response(struct mei_device *dev,
|
||||
void mei_client_connect_response(struct mei_device *dev,
|
||||
struct hbm_client_connect_response *rs)
|
||||
{
|
||||
|
||||
|
|
@ -261,8 +261,8 @@ static void mei_client_connect_response(struct mei_device *dev,
|
|||
* @dev: the device structure
|
||||
* @rs: disconnect response bus message
|
||||
*/
|
||||
static void mei_client_disconnect_response(struct mei_device *dev,
|
||||
struct hbm_client_connect_response *rs)
|
||||
void mei_client_disconnect_response(struct mei_device *dev,
|
||||
struct hbm_client_connect_response *rs)
|
||||
{
|
||||
struct mei_cl *cl;
|
||||
struct mei_cl_cb *pos = NULL, *next = NULL;
|
||||
|
|
@ -347,7 +347,7 @@ static void add_single_flow_creds(struct mei_device *dev,
|
|||
* @dev: the device structure
|
||||
* @flow_control: flow control response bus message
|
||||
*/
|
||||
static void mei_client_flow_control_response(struct mei_device *dev,
|
||||
void mei_client_flow_control_response(struct mei_device *dev,
|
||||
struct hbm_flow_control *flow_control)
|
||||
{
|
||||
struct mei_cl *cl_pos = NULL;
|
||||
|
|
@ -381,231 +381,6 @@ static void mei_client_flow_control_response(struct mei_device *dev,
|
|||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 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_connect_request *req)
|
||||
{
|
||||
return (cl->host_client_id == req->host_addr &&
|
||||
cl->me_client_id == req->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_connect_request *disconnect_req)
|
||||
{
|
||||
struct hbm_client_connect_response *disconnect_res;
|
||||
struct mei_cl *pos, *next;
|
||||
const size_t len = sizeof(struct hbm_client_connect_response);
|
||||
|
||||
list_for_each_entry_safe(pos, next, &dev->file_list, link) {
|
||||
if (same_disconn_addr(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);
|
||||
pos->state = MEI_FILE_DISCONNECTED;
|
||||
pos->timer_count = 0;
|
||||
if (pos == &dev->wd_cl)
|
||||
dev->wd_pending = false;
|
||||
else if (pos == &dev->iamthif_cl)
|
||||
dev->iamthif_timer = 0;
|
||||
|
||||
/* prepare disconnect response */
|
||||
(void)mei_hbm_hdr((u32 *)&dev->wr_ext_msg.hdr, len);
|
||||
disconnect_res =
|
||||
(struct hbm_client_connect_response *)
|
||||
&dev->wr_ext_msg.data;
|
||||
disconnect_res->hbm_cmd = CLIENT_DISCONNECT_RES_CMD;
|
||||
disconnect_res->host_addr = pos->host_client_id;
|
||||
disconnect_res->me_addr = pos->me_client_id;
|
||||
disconnect_res->status = 0;
|
||||
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 *hdr)
|
||||
{
|
||||
struct mei_bus_message *mei_msg;
|
||||
struct mei_me_client *me_client;
|
||||
struct hbm_host_version_response *version_res;
|
||||
struct hbm_client_connect_response *connect_res;
|
||||
struct hbm_client_connect_response *disconnect_res;
|
||||
struct hbm_client_connect_request *disconnect_req;
|
||||
struct hbm_flow_control *flow_control;
|
||||
struct hbm_props_response *props_res;
|
||||
struct hbm_host_enum_response *enum_res;
|
||||
struct hbm_host_stop_request *stop_req;
|
||||
|
||||
/* read the message to our buffer */
|
||||
BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
|
||||
mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
|
||||
mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
|
||||
|
||||
switch (mei_msg->hbm_cmd) {
|
||||
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->dev_state == MEI_DEV_INIT_CLIENTS &&
|
||||
dev->init_clients_state == MEI_START_MESSAGE) {
|
||||
dev->init_clients_timer = 0;
|
||||
mei_host_enum_clients_message(dev);
|
||||
} else {
|
||||
dev->recvd_msg = false;
|
||||
dev_dbg(&dev->pdev->dev, "IMEI reset due to received host start response bus message.\n");
|
||||
mei_reset(dev, 1);
|
||||
return;
|
||||
}
|
||||
} else {
|
||||
u32 *buf = dev->wr_msg_buf;
|
||||
const size_t len = sizeof(struct hbm_host_stop_request);
|
||||
|
||||
dev->version = version_res->me_max_version;
|
||||
|
||||
/* send stop message */
|
||||
hdr = mei_hbm_hdr(&buf[0], len);
|
||||
stop_req = (struct hbm_host_stop_request *)&buf[1];
|
||||
memset(stop_req, 0, len);
|
||||
stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
|
||||
stop_req->reason = DRIVER_STOP_REQUEST;
|
||||
|
||||
mei_write_message(dev, hdr, (unsigned char *)stop_req);
|
||||
dev_dbg(&dev->pdev->dev, "version mismatch.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
dev->recvd_msg = true;
|
||||
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;
|
||||
me_client = &dev->me_clients[dev->me_client_presentation_num];
|
||||
|
||||
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 (me_client->client_id != props_res->address) {
|
||||
dev_err(&dev->pdev->dev,
|
||||
"Host client properties reply mismatch\n");
|
||||
mei_reset(dev, 1);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
|
||||
dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) {
|
||||
dev_err(&dev->pdev->dev,
|
||||
"Unexpected client properties reply\n");
|
||||
mei_reset(dev, 1);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
me_client->props = props_res->client_properties;
|
||||
dev->me_client_index++;
|
||||
dev->me_client_presentation_num++;
|
||||
|
||||
mei_host_client_enumerate(dev);
|
||||
|
||||
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->dev_state == MEI_DEV_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;
|
||||
mei_allocate_me_clients_storage(dev);
|
||||
dev->init_clients_state =
|
||||
MEI_CLIENT_PROPERTIES_MESSAGE;
|
||||
|
||||
mei_host_client_enumerate(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->dev_state = MEI_DEV_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_connect_request *)mei_msg;
|
||||
mei_client_disconnect_request(dev, disconnect_req);
|
||||
break;
|
||||
|
||||
case ME_STOP_REQ_CMD:
|
||||
{
|
||||
/* prepare stop request: sent in next interrupt event */
|
||||
|
||||
const size_t len = sizeof(struct hbm_host_stop_request);
|
||||
|
||||
hdr = mei_hbm_hdr((u32 *)&dev->wr_ext_msg.hdr, len);
|
||||
stop_req = (struct hbm_host_stop_request *)&dev->wr_ext_msg.data;
|
||||
memset(stop_req, 0, len);
|
||||
stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
|
||||
stop_req->reason = DRIVER_STOP_REQUEST;
|
||||
break;
|
||||
}
|
||||
default:
|
||||
BUG();
|
||||
break;
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* _mei_hb_read - processes read related operation.
|
||||
|
|
@ -806,7 +581,7 @@ static int mei_irq_thread_read_handler(struct mei_cl_cb *cmpl_list,
|
|||
/* 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);
|
||||
mei_hbm_dispatch(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) &&
|
||||
|
|
|
|||
|
|
@ -402,6 +402,14 @@ int mei_ioctl_connect_client(struct file *file,
|
|||
int mei_start_read(struct mei_device *dev, struct mei_cl *cl);
|
||||
|
||||
|
||||
void mei_client_disconnect_response(struct mei_device *dev,
|
||||
struct hbm_client_connect_response *rs);
|
||||
|
||||
void mei_client_connect_response(struct mei_device *dev,
|
||||
struct hbm_client_connect_response *rs);
|
||||
|
||||
void mei_client_flow_control_response(struct mei_device *dev,
|
||||
struct hbm_flow_control *flow_control);
|
||||
/*
|
||||
* AMTHIF - AMT Host Interface Functions
|
||||
*/
|
||||
|
|
@ -452,6 +460,8 @@ void mei_enable_interrupts(struct mei_device *dev);
|
|||
void mei_disable_interrupts(struct mei_device *dev);
|
||||
|
||||
|
||||
void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr);
|
||||
|
||||
static inline struct mei_msg_hdr *mei_hbm_hdr(u32 *buf, size_t length)
|
||||
{
|
||||
struct mei_msg_hdr *hdr = (struct mei_msg_hdr *)buf;
|
||||
|
|
|
|||
Loading…
Reference in a new issue