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a40b260da6
rename function to mei_me_cl_allocate to match the current names convention: mei_hbm_me_cl_allocate Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
670 lines
17 KiB
C
670 lines
17 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/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 "hbm.h"
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#include "hw-me.h"
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/**
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* mei_hbm_me_cl_allocate - allocates storage for me clients
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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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static void mei_hbm_me_cl_allocate(struct mei_device *dev)
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{
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struct mei_me_client *clients;
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int b;
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/* count how many ME clients we have */
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for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX)
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dev->me_clients_num++;
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if (dev->me_clients_num <= 0)
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return;
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kfree(dev->me_clients);
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dev->me_clients = NULL;
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dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%zd.\n",
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dev->me_clients_num * sizeof(struct mei_me_client));
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/* allocate storage for ME clients representation */
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clients = kcalloc(dev->me_clients_num,
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sizeof(struct mei_me_client), GFP_KERNEL);
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if (!clients) {
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dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
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dev->dev_state = MEI_DEV_RESETING;
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mei_reset(dev, 1);
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return;
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}
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dev->me_clients = clients;
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return;
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}
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/**
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* mei_hbm_cl_hdr - construct client hbm header
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* @cl: - client
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* @hbm_cmd: host bus message command
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* @buf: buffer for cl header
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* @len: buffer length
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*/
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static inline
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void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
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{
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struct mei_hbm_cl_cmd *cmd = buf;
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memset(cmd, 0, len);
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cmd->hbm_cmd = hbm_cmd;
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cmd->host_addr = cl->host_client_id;
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cmd->me_addr = cl->me_client_id;
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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 true if addres are same
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*/
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static inline
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bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf)
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{
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struct mei_hbm_cl_cmd *cmd = buf;
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return cl->host_client_id == cmd->host_addr &&
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cl->me_client_id == cmd->me_addr;
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}
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/**
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* is_treat_specially_client - checks if the message belongs
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* to the file private data.
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*
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* @cl: private data of the file object
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* @rs: connect response bus message
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*
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*/
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static bool is_treat_specially_client(struct mei_cl *cl,
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struct hbm_client_connect_response *rs)
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{
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if (mei_hbm_cl_addr_equal(cl, rs)) {
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if (!rs->status) {
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cl->state = MEI_FILE_CONNECTED;
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cl->status = 0;
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} else {
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cl->state = MEI_FILE_DISCONNECTED;
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cl->status = -ENODEV;
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}
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cl->timer_count = 0;
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return true;
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}
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return false;
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}
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/**
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* mei_hbm_start_req - sends start request message.
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*
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* @dev: the device structure
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*/
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void mei_hbm_start_req(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.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_hbm_hdr(mei_hdr, len);
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/* host start message */
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start_req = (struct hbm_host_version_request *)dev->wr_msg.data;
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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, dev->wr_msg.data)) {
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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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* mei_hbm_enum_clients_req - 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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static void mei_hbm_enum_clients_req(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.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_hbm_hdr(mei_hdr, len);
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enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data;
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memset(enum_req, 0, len);
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enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
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if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
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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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/**
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* mei_hbm_prop_requsest - request property for a single client
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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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static int mei_hbm_prop_req(struct mei_device *dev)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.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_hbm_hdr(mei_hdr, len);
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prop_req = (struct hbm_props_request *)dev->wr_msg.data;
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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, dev->wr_msg.data)) {
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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_hbm_stop_req_prepare - perpare stop request message
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*
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* @dev - mei device
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* @mei_hdr - mei message header
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* @data - hbm message body buffer
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*/
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static void mei_hbm_stop_req_prepare(struct mei_device *dev,
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struct mei_msg_hdr *mei_hdr, unsigned char *data)
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{
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struct hbm_host_stop_request *req =
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(struct hbm_host_stop_request *)data;
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const size_t len = sizeof(struct hbm_host_stop_request);
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mei_hbm_hdr(mei_hdr, len);
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memset(req, 0, len);
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req->hbm_cmd = HOST_STOP_REQ_CMD;
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req->reason = DRIVER_STOP_REQUEST;
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}
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/**
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* mei_hbm_cl_flow_control_req - sends flow control requst.
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*
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* @dev: the device structure
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* @cl: client info
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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_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
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const size_t len = sizeof(struct hbm_flow_control);
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mei_hbm_hdr(mei_hdr, len);
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mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len);
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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, dev->wr_msg.data);
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}
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/**
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* add_single_flow_creds - adds single buffer credentials.
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*
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* @file: private data ot the file object.
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* @flow: flow control.
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*/
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static void mei_hbm_add_single_flow_creds(struct mei_device *dev,
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struct hbm_flow_control *flow)
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{
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struct mei_me_client *client;
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int i;
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for (i = 0; i < dev->me_clients_num; i++) {
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client = &dev->me_clients[i];
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if (client && flow->me_addr == client->client_id) {
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if (client->props.single_recv_buf) {
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client->mei_flow_ctrl_creds++;
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dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
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flow->me_addr);
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dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
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client->mei_flow_ctrl_creds);
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} else {
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BUG(); /* error in flow control */
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}
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}
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}
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}
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/**
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* mei_hbm_cl_flow_control_res - flow control response from me
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*
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* @dev: the device structure
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* @flow_control: flow control response bus message
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*/
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static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
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struct hbm_flow_control *flow_control)
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{
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struct mei_cl *cl = NULL;
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struct mei_cl *next = NULL;
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if (!flow_control->host_addr) {
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/* single receive buffer */
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mei_hbm_add_single_flow_creds(dev, flow_control);
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return;
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}
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/* normal connection */
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list_for_each_entry_safe(cl, next, &dev->file_list, link) {
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if (mei_hbm_cl_addr_equal(cl, flow_control)) {
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cl->mei_flow_ctrl_creds++;
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dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
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flow_control->host_addr, flow_control->me_addr);
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dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n",
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cl->mei_flow_ctrl_creds);
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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_cl_disconnect_req - sends disconnect message to fw.
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*
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* @dev: the device structure
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* @cl: a client to disconnect from
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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_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
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const size_t len = sizeof(struct hbm_client_connect_request);
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mei_hbm_hdr(mei_hdr, len);
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mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, dev->wr_msg.data, len);
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return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
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}
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/**
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* mei_hbm_cl_disconnect_res - disconnect response from ME
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*
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* @dev: the device structure
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* @rs: disconnect response bus message
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*/
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static void mei_hbm_cl_disconnect_res(struct mei_device *dev,
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struct hbm_client_connect_response *rs)
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{
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struct mei_cl *cl;
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struct mei_cl_cb *pos = NULL, *next = NULL;
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dev_dbg(&dev->pdev->dev,
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"disconnect_response:\n"
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"ME Client = %d\n"
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"Host Client = %d\n"
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"Status = %d\n",
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rs->me_addr,
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rs->host_addr,
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rs->status);
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list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
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cl = pos->cl;
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if (!cl) {
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list_del(&pos->list);
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return;
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}
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dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
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if (mei_hbm_cl_addr_equal(cl, rs)) {
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list_del(&pos->list);
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if (!rs->status)
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cl->state = MEI_FILE_DISCONNECTED;
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cl->status = 0;
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cl->timer_count = 0;
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break;
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}
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}
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}
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/**
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* mei_hbm_cl_connect_req - send connection request to specific me client
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*
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* @dev: the device structure
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* @cl: a client to connect to
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*
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* returns -EIO on write failure
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*/
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int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
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{
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struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
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const size_t len = sizeof(struct hbm_client_connect_request);
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mei_hbm_hdr(mei_hdr, len);
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mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, dev->wr_msg.data, len);
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return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
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}
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/**
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* mei_hbm_cl_connect_res - connect resposne from the ME
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*
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* @dev: the device structure
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* @rs: connect response bus message
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*/
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static void mei_hbm_cl_connect_res(struct mei_device *dev,
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struct hbm_client_connect_response *rs)
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{
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struct mei_cl *cl;
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struct mei_cl_cb *pos = NULL, *next = NULL;
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dev_dbg(&dev->pdev->dev,
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"connect_response:\n"
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"ME Client = %d\n"
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"Host Client = %d\n"
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"Status = %d\n",
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rs->me_addr,
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rs->host_addr,
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rs->status);
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/* if WD or iamthif client treat specially */
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if (is_treat_specially_client(&dev->wd_cl, rs)) {
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dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
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mei_watchdog_register(dev);
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return;
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}
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if (is_treat_specially_client(&dev->iamthif_cl, rs)) {
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dev->iamthif_state = MEI_IAMTHIF_IDLE;
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return;
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}
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list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
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cl = pos->cl;
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if (!cl) {
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list_del(&pos->list);
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return;
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}
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if (pos->fop_type == MEI_FOP_IOCTL) {
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if (is_treat_specially_client(cl, rs)) {
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list_del(&pos->list);
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cl->status = 0;
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cl->timer_count = 0;
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break;
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}
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}
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}
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}
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/**
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* mei_client_disconnect_request - disconnect request initiated by me
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* host sends disoconnect response
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*
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* @dev: the device structure.
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* @disconnect_req: disconnect request bus message from the me
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*/
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static void mei_hbm_fw_disconnect_req(struct mei_device *dev,
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struct hbm_client_connect_request *disconnect_req)
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{
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struct mei_cl *cl, *next;
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const size_t len = sizeof(struct hbm_client_connect_response);
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list_for_each_entry_safe(cl, next, &dev->file_list, link) {
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if (mei_hbm_cl_addr_equal(cl, 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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cl->state = MEI_FILE_DISCONNECTED;
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cl->timer_count = 0;
|
|
if (cl == &dev->wd_cl)
|
|
dev->wd_pending = false;
|
|
else if (cl == &dev->iamthif_cl)
|
|
dev->iamthif_timer = 0;
|
|
|
|
/* prepare disconnect response */
|
|
mei_hbm_hdr(&dev->wr_ext_msg.hdr, len);
|
|
mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD,
|
|
dev->wr_ext_msg.data, len);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* mei_hbm_dispatch - bottom half read routine after ISR to
|
|
* handle the read bus message cmd processing.
|
|
*
|
|
* @dev: the device structure
|
|
* @mei_hdr: header of bus message
|
|
*/
|
|
void mei_hbm_dispatch(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;
|
|
|
|
/* 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 = version_res->me_max_version;
|
|
dev_dbg(&dev->pdev->dev, "version mismatch.\n");
|
|
|
|
mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr,
|
|
dev->wr_msg.data);
|
|
mei_write_message(dev, &dev->wr_msg.hdr,
|
|
dev->wr_msg.data);
|
|
return;
|
|
}
|
|
|
|
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_hbm_enum_clients_req(dev);
|
|
} else {
|
|
dev->recvd_msg = false;
|
|
dev_dbg(&dev->pdev->dev, "reset due to received hbm: host start\n");
|
|
mei_reset(dev, 1);
|
|
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_hbm_cl_connect_res(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_hbm_cl_disconnect_res(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_hbm_cl_flow_control_res(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++;
|
|
|
|
/* request property for the next client */
|
|
mei_hbm_prop_req(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_hbm_me_cl_allocate(dev);
|
|
dev->init_clients_state =
|
|
MEI_CLIENT_PROPERTIES_MESSAGE;
|
|
|
|
/* first property reqeust */
|
|
mei_hbm_prop_req(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_hbm_fw_disconnect_req(dev, disconnect_req);
|
|
break;
|
|
|
|
case ME_STOP_REQ_CMD:
|
|
|
|
mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr,
|
|
dev->wr_ext_msg.data);
|
|
break;
|
|
default:
|
|
BUG();
|
|
break;
|
|
|
|
}
|
|
}
|
|
|