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 2012-12-25 19:06:07 +02:00 committed by Greg Kroah-Hartman
parent 3a65dd4ea3
commit bb1b0133b3
6 changed files with 456 additions and 419 deletions

View file

@ -4,6 +4,7 @@
#
obj-$(CONFIG_INTEL_MEI) += mei.o
mei-objs := init.o
mei-objs += hbm.o
mei-objs += interrupt.o
mei-objs += interface.o
mei-objs += iorw.o

440
drivers/misc/mei/hbm.c Normal file
View file

@ -0,0 +1,440 @@
/*
*
* Intel Management Engine Interface (Intel MEI) Linux driver
* Copyright (c) 2003-2012, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
*/
#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/mei.h>
#include "mei_dev.h"
#include "interface.h"
/**
* 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;
}
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_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_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);
}
/**
* 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_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;
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;
}
}

View file

@ -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.

View file

@ -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);
}

View file

@ -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) &&

View file

@ -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;