Commit cd51ed64 authored by Tomas Winkler's avatar Tomas Winkler Committed by Greg Kroah-Hartman

mei: simplify preparing client host bus messages

Define a new parent type mei_hbm_cl_cmd for hbm
commands that are sent on behalf of specific ME client.
This allows us compacting boilerplate code via mei_hbm_cl_hdr
function
Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2efdf546
......@@ -22,6 +22,42 @@
#include "mei_dev.h"
#include "interface.h"
/**
* mei_hbm_cl_hdr - construct client hbm header
* @cl: - client
* @hbm_cmd: host bus message command
* @buf: buffer for cl header
* @len: buffer length
*/
static inline
void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
{
struct mei_hbm_cl_cmd *cmd = buf;
memset(cmd, 0, len);
cmd->hbm_cmd = hbm_cmd;
cmd->host_addr = cl->host_client_id;
cmd->me_addr = cl->me_client_id;
}
/**
* same_disconn_addr - tells if they have the same address
*
* @file: private data of the file object.
* @disconn: disconnection request.
*
* returns true if addres are same
*/
static inline
bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf)
{
struct mei_hbm_cl_cmd *cmd = buf;
return cl->host_client_id == cmd->host_addr &&
cl->me_client_id == cmd->me_addr;
}
/**
* host_start_message - mei host sends start message.
*
......@@ -144,22 +180,16 @@ int mei_host_client_enumerate(struct mei_device *dev)
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;
unsigned char *buf = (unsigned char *)&dev->wr_msg_buf[1];
const size_t len = sizeof(struct hbm_flow_control);
mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, buf, 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);
return mei_write_message(dev, mei_hdr, buf);
}
/**
......@@ -173,19 +203,13 @@ int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl)
int mei_disconnect(struct mei_device *dev, struct mei_cl *cl)
{
struct mei_msg_hdr *hdr;
struct hbm_client_connect_request *req;
unsigned char *buf = (unsigned char *)&dev->wr_msg_buf[1];
const size_t len = sizeof(struct hbm_client_connect_request);
hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, buf, 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);
return mei_write_message(dev, hdr, buf);
}
/**
......@@ -199,33 +223,13 @@ int mei_disconnect(struct mei_device *dev, struct mei_cl *cl)
int mei_connect(struct mei_device *dev, struct mei_cl *cl)
{
struct mei_msg_hdr *hdr;
struct hbm_client_connect_request *req;
unsigned char *buf = (unsigned char *)&dev->wr_msg_buf[1];
const size_t len = sizeof(struct hbm_client_connect_request);
hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, buf, 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);
return mei_write_message(dev, hdr, buf);
}
/**
......@@ -237,31 +241,25 @@ static int same_disconn_addr(struct mei_cl *cl,
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;
struct mei_cl *cl, *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)) {
list_for_each_entry_safe(cl, next, &dev->file_list, link) {
if (mei_hbm_cl_addr_equal(cl, 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)
cl->state = MEI_FILE_DISCONNECTED;
cl->timer_count = 0;
if (cl == &dev->wd_cl)
dev->wd_pending = false;
else if (pos == &dev->iamthif_cl)
else if (cl == &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;
mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD,
&dev->wr_ext_msg.data, len);
break;
}
}
......
......@@ -121,6 +121,22 @@ struct mei_bus_message {
u8 data[0];
} __packed;
/**
* struct hbm_cl_cmd - client specific host bus command
* CONNECT, DISCONNECT, and FlOW CONTROL
*
* @hbm_cmd - bus message command header
* @me_addr - address of the client in ME
* @host_addr - address of the client in the driver
* @data
*/
struct mei_hbm_cl_cmd {
u8 hbm_cmd;
u8 me_addr;
u8 host_addr;
u8 data;
};
struct hbm_version {
u8 minor_version;
u8 major_version;
......
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