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mei: compact code for mei bus message creation
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1. replace boilerplate code for filling up the bus message header
 with a common wrapper function
2. shorten variable names and use temporal variables
 to save some screen space

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Tomas Winkler authored and Greg Kroah-Hartman committed Nov 21, 2012
1 parent 2c9e9fd commit 5bd6471
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Showing 4 changed files with 112 additions and 148 deletions.
78 changes: 34 additions & 44 deletions drivers/misc/mei/init.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ const char *mei_dev_state_str(int state)
}



/**
* mei_io_list_flush - removes list entry belonging to cl.
*
Expand Down Expand Up @@ -331,25 +332,20 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
void mei_host_start_message(struct mei_device *dev)
{
struct mei_msg_hdr *mei_hdr;
struct hbm_host_version_request *host_start_req;
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 */
mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
mei_hdr->host_addr = 0;
mei_hdr->me_addr = 0;
mei_hdr->length = sizeof(struct hbm_host_version_request);
mei_hdr->msg_complete = 1;
mei_hdr->reserved = 0;

host_start_req =
(struct hbm_host_version_request *) &dev->wr_msg_buf[1];
memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
host_start_req->hbm_cmd = HOST_START_REQ_CMD;
host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
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 *)host_start_req,
mei_hdr->length)) {
if (mei_write_message(dev, mei_hdr, (unsigned char *)start_req, len)) {
dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n");
dev->dev_state = MEI_DEV_RESETING;
mei_reset(dev, 1);
Expand All @@ -369,20 +365,16 @@ void mei_host_start_message(struct mei_device *dev)
void mei_host_enum_clients_message(struct mei_device *dev)
{
struct mei_msg_hdr *mei_hdr;
struct hbm_host_enum_request *host_enum_req;
mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
struct hbm_host_enum_request *enum_req;
const size_t len = sizeof(struct hbm_host_enum_request);
/* enumerate clients */
mei_hdr->host_addr = 0;
mei_hdr->me_addr = 0;
mei_hdr->length = sizeof(struct hbm_host_enum_request);
mei_hdr->msg_complete = 1;
mei_hdr->reserved = 0;

host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
host_enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
if (mei_write_message(dev, mei_hdr, (unsigned char *)host_enum_req,
mei_hdr->length)) {
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, len)) {
dev->dev_state = MEI_DEV_RESETING;
dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
mei_reset(dev, 1);
Expand Down Expand Up @@ -443,33 +435,31 @@ void mei_allocate_me_clients_storage(struct mei_device *dev)
*/
int mei_host_client_properties(struct mei_device *dev)
{
struct mei_msg_hdr *mei_header;
struct hbm_props_request *host_cli_req;

struct mei_msg_hdr *mei_hdr;
struct hbm_props_request *prop_req;
const size_t len = sizeof(struct hbm_props_request);

int b;
u8 client_num = dev->me_client_presentation_num;

prop_req = (struct hbm_props_request *)&dev->wr_msg_buf[1];

b = dev->me_client_index;
b = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, b);
if (b < MEI_CLIENTS_MAX) {
dev->me_clients[client_num].client_id = b;
dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
mei_header = (struct mei_msg_hdr *)&dev->wr_msg_buf[0];
mei_header->host_addr = 0;
mei_header->me_addr = 0;
mei_header->length = sizeof(struct hbm_props_request);
mei_header->msg_complete = 1;
mei_header->reserved = 0;
mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);

host_cli_req = (struct hbm_props_request *)&dev->wr_msg_buf[1];

memset(host_cli_req, 0, sizeof(struct hbm_props_request));
memset(prop_req, 0, sizeof(struct hbm_props_request));

host_cli_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
host_cli_req->address = b;
prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
prop_req->address = b;

if (mei_write_message(dev, mei_header,
(unsigned char *)host_cli_req,
mei_header->length)) {
if (mei_write_message(dev, mei_hdr,
(unsigned char *)prop_req, len)) {
dev->dev_state = MEI_DEV_RESETING;
dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
mei_reset(dev, 1);
Expand Down
75 changes: 29 additions & 46 deletions drivers/misc/mei/interface.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -292,28 +292,23 @@ int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl)
int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl)
{
struct mei_msg_hdr *mei_hdr;
struct hbm_flow_control *mei_flow_control;

mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
mei_hdr->host_addr = 0;
mei_hdr->me_addr = 0;
mei_hdr->length = sizeof(struct hbm_flow_control);
mei_hdr->msg_complete = 1;
mei_hdr->reserved = 0;

mei_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
memset(mei_flow_control, 0, sizeof(*mei_flow_control));
mei_flow_control->host_addr = cl->host_client_id;
mei_flow_control->me_addr = cl->me_client_id;
mei_flow_control->hbm_cmd = MEI_FLOW_CONTROL_CMD;
memset(mei_flow_control->reserved, 0,
sizeof(mei_flow_control->reserved));
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 *) mei_flow_control,
sizeof(struct hbm_flow_control));
(unsigned char *) flow_ctrl, len);
}

/**
Expand Down Expand Up @@ -353,23 +348,18 @@ int mei_disconnect(struct mei_device *dev, struct mei_cl *cl)
{
struct mei_msg_hdr *mei_hdr;
struct hbm_client_connect_request *req;
const size_t len = sizeof(struct hbm_client_connect_request);

mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
mei_hdr->host_addr = 0;
mei_hdr->me_addr = 0;
mei_hdr->length = sizeof(struct hbm_client_connect_request);
mei_hdr->msg_complete = 1;
mei_hdr->reserved = 0;
mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);

req = (struct hbm_client_connect_request *)&dev->wr_msg_buf[1];
memset(req, 0, sizeof(*req));
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->hbm_cmd = CLIENT_DISCONNECT_REQ_CMD;
req->reserved = 0;

return mei_write_message(dev, mei_hdr, (unsigned char *)req,
sizeof(struct hbm_client_connect_request));
return mei_write_message(dev, mei_hdr, (unsigned char *)req, len);
}

/**
Expand All @@ -383,23 +373,16 @@ 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 *mei_hdr;
struct hbm_client_connect_request *mei_cli_connect;

mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
mei_hdr->host_addr = 0;
mei_hdr->me_addr = 0;
mei_hdr->length = sizeof(struct hbm_client_connect_request);
mei_hdr->msg_complete = 1;
mei_hdr->reserved = 0;

mei_cli_connect =
(struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
mei_cli_connect->host_addr = cl->host_client_id;
mei_cli_connect->me_addr = cl->me_client_id;
mei_cli_connect->hbm_cmd = CLIENT_CONNECT_REQ_CMD;
mei_cli_connect->reserved = 0;
struct hbm_client_connect_request *req;
const size_t len = sizeof(struct hbm_client_connect_request);

return mei_write_message(dev, mei_hdr,
(unsigned char *) mei_cli_connect,
sizeof(struct hbm_client_connect_request));
mei_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, mei_hdr, (unsigned char *) req, len);
}
96 changes: 38 additions & 58 deletions drivers/misc/mei/interrupt.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -429,47 +429,37 @@ 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 mei_msg_hdr *mei_hdr;
struct hbm_client_connect_response *disconnect_res;
struct mei_cl *cl_pos = NULL;
struct mei_cl *cl_next = NULL;
struct mei_cl *pos, *next;
const size_t len = sizeof(struct hbm_client_connect_response);

list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
if (same_disconn_addr(cl_pos, disconnect_req)) {
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);
cl_pos->state = MEI_FILE_DISCONNECTED;
cl_pos->timer_count = 0;
if (cl_pos == &dev->wd_cl)
pos->state = MEI_FILE_DISCONNECTED;
pos->timer_count = 0;
if (pos == &dev->wd_cl)
dev->wd_pending = false;
else if (cl_pos == &dev->iamthif_cl)
else if (pos == &dev->iamthif_cl)
dev->iamthif_timer = 0;

/* prepare disconnect response */
mei_hdr =
(struct mei_msg_hdr *) &dev->ext_msg_buf[0];
mei_hdr->host_addr = 0;
mei_hdr->me_addr = 0;
mei_hdr->length =
sizeof(struct hbm_client_connect_response);
mei_hdr->msg_complete = 1;
mei_hdr->reserved = 0;

(void)mei_hbm_hdr(&dev->ext_msg_buf[0], len);
disconnect_res =
(struct hbm_client_connect_response *)
&dev->ext_msg_buf[1];
disconnect_res->host_addr = cl_pos->host_client_id;
disconnect_res->me_addr = cl_pos->me_client_id;
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;
dev->extra_write_index = 2;
break;
}
}
}


/**
* mei_irq_thread_read_bus_message - bottom half read routine after ISR to
* handle the read bus message cmd processing.
Expand All @@ -488,7 +478,7 @@ static void mei_irq_thread_read_bus_message(struct mei_device *dev,
struct hbm_flow_control *flow_control;
struct hbm_props_response *props_res;
struct hbm_host_enum_response *enum_res;
struct hbm_host_stop_request *host_stop_req;
struct hbm_host_stop_request *stop_req;
int res;


Expand All @@ -514,26 +504,20 @@ static void mei_irq_thread_read_bus_message(struct mei_device *dev,
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 */
mei_hdr = (struct mei_msg_hdr *)&dev->wr_msg_buf[0];
mei_hdr->host_addr = 0;
mei_hdr->me_addr = 0;
mei_hdr->length = sizeof(struct hbm_host_stop_request);
mei_hdr->msg_complete = 1;
mei_hdr->reserved = 0;

host_stop_req = (struct hbm_host_stop_request *)
&dev->wr_msg_buf[1];

memset(host_stop_req,
0,
sizeof(struct hbm_host_stop_request));
host_stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
host_stop_req->reason = DRIVER_STOP_REQUEST;
mei_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, mei_hdr,
(unsigned char *) (host_stop_req),
mei_hdr->length);
(unsigned char *)stop_req, len);
dev_dbg(&dev->pdev->dev, "version mismatch.\n");
return;
}
Expand All @@ -543,16 +527,14 @@ static void mei_irq_thread_read_bus_message(struct mei_device *dev,
break;

case CLIENT_CONNECT_RES_CMD:
connect_res =
(struct hbm_client_connect_response *) mei_msg;
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;
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);
Expand Down Expand Up @@ -658,23 +640,21 @@ static void mei_irq_thread_read_bus_message(struct mei_device *dev,
break;

case ME_STOP_REQ_CMD:
/* prepare stop request */
mei_hdr = (struct mei_msg_hdr *) &dev->ext_msg_buf[0];
mei_hdr->host_addr = 0;
mei_hdr->me_addr = 0;
mei_hdr->length = sizeof(struct hbm_host_stop_request);
mei_hdr->msg_complete = 1;
mei_hdr->reserved = 0;
host_stop_req =
(struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
host_stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
host_stop_req->reason = DRIVER_STOP_REQUEST;
host_stop_req->reserved[0] = 0;
host_stop_req->reserved[1] = 0;
{
/* prepare stop request: sent in next interrupt event */

u32 *buf = dev->ext_msg_buf;
const size_t len = sizeof(struct hbm_host_stop_request);

mei_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;

dev->extra_write_index = 2;
break;

}
default:
BUG();
break;
Expand Down
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