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Commit 9ca9050b authored by Tomas Winkler's avatar Tomas Winkler Committed by Greg Kroah-Hartman
Browse files

mei: move client functions to client.c 



This file now contains me and host client functions
and also io callback helpers
We also kill iorw.c which is no longer needed

Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0edb23fc

drivers/misc/mei/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -7,7 +7,7 @@ mei-objs := init.o 
mei-objs += hbm.o

mei-objs += interrupt.o

mei-objs += interface.o

mei-objs += iorw.o

mei-objs += main.o

mei-objs += amthif.o

mei-objs += wd.o

mei-objs += client.o

drivers/misc/mei/iorw.c→drivers/misc/mei/client.c

+360 −17
Original line number Diff line number Diff line
@@ -14,24 +14,10 @@ 
 *

 */





#include <linux/kernel.h>

#include <linux/fs.h>

#include <linux/errno.h>

#include <linux/types.h>

#include <linux/fcntl.h>

#include <linux/aio.h>

#include <linux/pci.h>

#include <linux/init.h>

#include <linux/ioctl.h>

#include <linux/cdev.h>

#include <linux/list.h>

#include <linux/delay.h>

#include <linux/sched.h>

#include <linux/uuid.h>

#include <linux/jiffies.h>

#include <linux/uaccess.h>



#include <linux/wait.h>

#include <linux/delay.h>



#include <linux/mei.h>
@@ -39,6 +25,24 @@ 
#include "hbm.h"

#include "interface.h"





/**

 * mei_io_list_flush - removes list entry belonging to cl.

 *

 * @list:  An instance of our list structure

 * @cl: host client

 */

void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl)

{

	struct mei_cl_cb *cb;

	struct mei_cl_cb *next;



	list_for_each_entry_safe(cb, next, &list->list, list) {

		if (cb->cl && mei_cl_cmp_id(cl, cb->cl))

			list_del(&cb->list);

	}

}



/**

 * mei_io_cb_free - free mei_cb_private related memory

 *
@@ -53,6 +57,7 @@ void mei_io_cb_free(struct mei_cl_cb *cb) 
	kfree(cb->response_buffer.data);

	kfree(cb);

}



/**

 * mei_io_cb_init - allocate and initialize io callback

 *
@@ -77,7 +82,6 @@ struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp) 
	return cb;

}





/**

 * mei_io_cb_alloc_req_buf - allocate request buffer

 *
@@ -128,6 +132,50 @@ int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length) 
}







/**

 * mei_cl_flush_queues - flushes queue lists belonging to cl.

 *

 * @dev: the device structure

 * @cl: host client

 */

int mei_cl_flush_queues(struct mei_cl *cl)

{

	if (!cl || !cl->dev)

		return -EINVAL;



	dev_dbg(&cl->dev->pdev->dev, "remove list entry belonging to cl\n");

	mei_io_list_flush(&cl->dev->read_list, cl);

	mei_io_list_flush(&cl->dev->write_list, cl);

	mei_io_list_flush(&cl->dev->write_waiting_list, cl);

	mei_io_list_flush(&cl->dev->ctrl_wr_list, cl);

	mei_io_list_flush(&cl->dev->ctrl_rd_list, cl);

	mei_io_list_flush(&cl->dev->amthif_cmd_list, cl);

	mei_io_list_flush(&cl->dev->amthif_rd_complete_list, cl);

	return 0;

}



/**

 * mei_me_cl_by_uuid - locate index of me client

 *

 * @dev: mei device

 * returns me client index or -ENOENT if not found

 */

int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid)

{

	int i, res = -ENOENT;



	for (i = 0; i < dev->me_clients_num; ++i)

		if (uuid_le_cmp(*uuid,

				dev->me_clients[i].props.protocol_name) == 0) {

			res = i;

			break;

		}



	return res;

}





/**

 * mei_me_cl_by_id return index to me_clients for client_id

 *
@@ -154,6 +202,301 @@ int mei_me_cl_by_id(struct mei_device *dev, u8 client_id) 
	return i;

}



/**

 * mei_cl_init - initializes intialize cl.

 *

 * @cl: host client to be initialized

 * @dev: mei device

 */

void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)

{

	memset(cl, 0, sizeof(struct mei_cl));

	init_waitqueue_head(&cl->wait);

	init_waitqueue_head(&cl->rx_wait);

	init_waitqueue_head(&cl->tx_wait);

	INIT_LIST_HEAD(&cl->link);

	cl->reading_state = MEI_IDLE;

	cl->writing_state = MEI_IDLE;

	cl->dev = dev;

}



/**

 * mei_cl_allocate - allocates cl  structure and sets it up.

 *

 * @dev: mei device

 * returns  The allocated file or NULL on failure

 */

struct mei_cl *mei_cl_allocate(struct mei_device *dev)

{

	struct mei_cl *cl;



	cl = kmalloc(sizeof(struct mei_cl), GFP_KERNEL);

	if (!cl)

		return NULL;



	mei_cl_init(cl, dev);



	return cl;

}





/**

 * mei_me_cl_link - create link between host and me clinet and add

 *   me_cl to the list

 *

 * @dev: the device structure

 * @cl: link between me and host client assocated with opened file descriptor

 * @uuid: uuid of ME client

 * @client_id: id of the host client

 *

 * returns ME client index if ME client

 *	-EINVAL on incorrect values

 *	-ENONET if client not found

 */

int mei_me_cl_link(struct mei_device *dev, struct mei_cl *cl,

			const uuid_le *uuid, u8 host_cl_id)

{

	int i;



	if (!dev || !cl || !uuid)

		return -EINVAL;



	/* check for valid client id */

	i = mei_me_cl_by_uuid(dev, uuid);

	if (i >= 0) {

		cl->me_client_id = dev->me_clients[i].client_id;

		cl->state = MEI_FILE_CONNECTING;

		cl->host_client_id = host_cl_id;



		list_add_tail(&cl->link, &dev->file_list);

		return (u8)i;

	}



	return -ENOENT;

}

/**

 * mei_me_cl_unlink - remove me_cl from the list

 *

 * @dev: the device structure

 * @host_client_id: host client id to be removed

 */

void mei_me_cl_unlink(struct mei_device *dev, struct mei_cl *cl)

{

	struct mei_cl *pos, *next;

	list_for_each_entry_safe(pos, next, &dev->file_list, link) {

		if (cl->host_client_id == pos->host_client_id) {

			dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n",

					pos->host_client_id, pos->me_client_id);

			list_del_init(&pos->link);

			break;

		}

	}

}





void mei_host_client_init(struct work_struct *work)

{

	struct mei_device *dev = container_of(work,

					      struct mei_device, init_work);

	struct mei_client_properties *client_props;

	int i;



	mutex_lock(&dev->device_lock);



	bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);

	dev->open_handle_count = 0;



	/*

	 * Reserving the first three client IDs

	 * 0: Reserved for MEI Bus Message communications

	 * 1: Reserved for Watchdog

	 * 2: Reserved for AMTHI

	 */

	bitmap_set(dev->host_clients_map, 0, 3);



	for (i = 0; i < dev->me_clients_num; i++) {

		client_props = &dev->me_clients[i].props;



		if (!uuid_le_cmp(client_props->protocol_name, mei_amthi_guid))

			mei_amthif_host_init(dev);

		else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid))

			mei_wd_host_init(dev);

	}



	dev->dev_state = MEI_DEV_ENABLED;



	mutex_unlock(&dev->device_lock);

}





/**

 * mei_disconnect_host_client - sends disconnect message to fw from host client.

 *

 * @dev: the device structure

 * @cl: private data of the file object

 *

 * Locking: called under "dev->device_lock" lock

 *

 * returns 0 on success, <0 on failure.

 */

int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl)

{

	struct mei_cl_cb *cb;

	int rets, err;



	if (!dev || !cl)

		return -ENODEV;



	if (cl->state != MEI_FILE_DISCONNECTING)

		return 0;



	cb = mei_io_cb_init(cl, NULL);

	if (!cb)

		return -ENOMEM;



	cb->fop_type = MEI_FOP_CLOSE;

	if (dev->mei_host_buffer_is_empty) {

		dev->mei_host_buffer_is_empty = false;

		if (mei_hbm_cl_disconnect_req(dev, cl)) {

			rets = -ENODEV;

			dev_err(&dev->pdev->dev, "failed to disconnect.\n");

			goto free;

		}

		mdelay(10); /* Wait for hardware disconnection ready */

		list_add_tail(&cb->list, &dev->ctrl_rd_list.list);

	} else {

		dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n");

		list_add_tail(&cb->list, &dev->ctrl_wr_list.list);



	}

	mutex_unlock(&dev->device_lock);



	err = wait_event_timeout(dev->wait_recvd_msg,

			MEI_FILE_DISCONNECTED == cl->state,

			mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));



	mutex_lock(&dev->device_lock);

	if (MEI_FILE_DISCONNECTED == cl->state) {

		rets = 0;

		dev_dbg(&dev->pdev->dev, "successfully disconnected from FW client.\n");

	} else {

		rets = -ENODEV;

		if (MEI_FILE_DISCONNECTED != cl->state)

			dev_dbg(&dev->pdev->dev, "wrong status client disconnect.\n");



		if (err)

			dev_dbg(&dev->pdev->dev,

					"wait failed disconnect err=%08x\n",

					err);



		dev_dbg(&dev->pdev->dev, "failed to disconnect from FW client.\n");

	}



	mei_io_list_flush(&dev->ctrl_rd_list, cl);

	mei_io_list_flush(&dev->ctrl_wr_list, cl);

free:

	mei_io_cb_free(cb);

	return rets;

}





/**

 * mei_other_client_is_connecting - checks if other

 *    client with the same client id is connected.

 *

 * @dev: the device structure

 * @cl: private data of the file object

 *

 * returns 1 if other client is connected, 0 - otherwise.

 */

int mei_other_client_is_connecting(struct mei_device *dev,

				struct mei_cl *cl)

{

	struct mei_cl *cl_pos = NULL;

	struct mei_cl *cl_next = NULL;



	list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {

		if ((cl_pos->state == MEI_FILE_CONNECTING) &&

			(cl_pos != cl) &&

			cl->me_client_id == cl_pos->me_client_id)

			return 1;



	}

	return 0;

}



/**

 * mei_flow_ctrl_creds - checks flow_control credentials.

 *

 * @dev: the device structure

 * @cl: private data of the file object

 *

 * returns 1 if mei_flow_ctrl_creds >0, 0 - otherwise.

 *	-ENOENT if mei_cl is not present

 *	-EINVAL if single_recv_buf == 0

 */

int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl)

{

	int i;



	if (!dev->me_clients_num)

		return 0;



	if (cl->mei_flow_ctrl_creds > 0)

		return 1;



	for (i = 0; i < dev->me_clients_num; i++) {

		struct mei_me_client  *me_cl = &dev->me_clients[i];

		if (me_cl->client_id == cl->me_client_id) {

			if (me_cl->mei_flow_ctrl_creds) {

				if (WARN_ON(me_cl->props.single_recv_buf == 0))

					return -EINVAL;

				return 1;

			} else {

				return 0;

			}

		}

	}

	return -ENOENT;

}



/**

 * mei_flow_ctrl_reduce - reduces flow_control.

 *

 * @dev: the device structure

 * @cl: private data of the file object

 * @returns

 *	0 on success

 *	-ENOENT when me client is not found

 *	-EINVAL when ctrl credits are <= 0

 */

int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl)

{

	int i;



	if (!dev->me_clients_num)

		return -ENOENT;



	for (i = 0; i < dev->me_clients_num; i++) {

		struct mei_me_client  *me_cl = &dev->me_clients[i];

		if (me_cl->client_id == cl->me_client_id) {

			if (me_cl->props.single_recv_buf != 0) {

				if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0))

					return -EINVAL;

				dev->me_clients[i].mei_flow_ctrl_creds--;

			} else {

				if (WARN_ON(cl->mei_flow_ctrl_creds <= 0))

					return -EINVAL;

				cl->mei_flow_ctrl_creds--;

			}

			return 0;

		}

	}

	return -ENOENT;

}







/**

 * mei_ioctl_connect_client - the connect to fw client IOCTL function

 *

drivers/misc/mei/init.c

+0 −252
Original line number Diff line number Diff line
@@ -22,7 +22,6 @@ 
#include <linux/mei.h>



#include "mei_dev.h"

#include "hbm.h"

#include "interface.h"



const char *mei_dev_state_str(int state)
@@ -45,47 +44,6 @@ const char *mei_dev_state_str(int state) 






/**

 * mei_io_list_flush - removes list entry belonging to cl.

 *

 * @list:  An instance of our list structure

 * @cl: private data of the file object

 */

void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl)

{

	struct mei_cl_cb *pos;

	struct mei_cl_cb *next;



	list_for_each_entry_safe(pos, next, &list->list, list) {

		if (pos->cl) {

			if (mei_cl_cmp_id(cl, pos->cl))

				list_del(&pos->list);

		}

	}

}

/**

 * mei_cl_flush_queues - flushes queue lists belonging to cl.

 *

 * @dev: the device structure

 * @cl: private data of the file object

 */

int mei_cl_flush_queues(struct mei_cl *cl)

{

	if (!cl || !cl->dev)

		return -EINVAL;



	dev_dbg(&cl->dev->pdev->dev, "remove list entry belonging to cl\n");

	mei_io_list_flush(&cl->dev->read_list, cl);

	mei_io_list_flush(&cl->dev->write_list, cl);

	mei_io_list_flush(&cl->dev->write_waiting_list, cl);

	mei_io_list_flush(&cl->dev->ctrl_wr_list, cl);

	mei_io_list_flush(&cl->dev->ctrl_rd_list, cl);

	mei_io_list_flush(&cl->dev->amthif_cmd_list, cl);

	mei_io_list_flush(&cl->dev->amthif_rd_complete_list, cl);

	return 0;

}







/**

 * init_mei_device - allocates and initializes the mei device structure
@@ -360,215 +318,5 @@ void mei_allocate_me_clients_storage(struct mei_device *dev) 
	return ;

}



void mei_host_client_init(struct work_struct *work)

{

	struct mei_device *dev = container_of(work,

					      struct mei_device, init_work);

	struct mei_client_properties *client_props;

	int i;



	mutex_lock(&dev->device_lock);



	bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);

	dev->open_handle_count = 0;



	/*

	 * Reserving the first three client IDs

	 * 0: Reserved for MEI Bus Message communications

	 * 1: Reserved for Watchdog

	 * 2: Reserved for AMTHI

	 */

	bitmap_set(dev->host_clients_map, 0, 3);



	for (i = 0; i < dev->me_clients_num; i++) {

		client_props = &dev->me_clients[i].props;



		if (!uuid_le_cmp(client_props->protocol_name, mei_amthi_guid))

			mei_amthif_host_init(dev);

		else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid))

			mei_wd_host_init(dev);

	}



	dev->dev_state = MEI_DEV_ENABLED;



	mutex_unlock(&dev->device_lock);

}





/**

 * mei_init_file_private - initializes private file structure.

 *

 * @priv: private file structure to be initialized

 * @file: the file structure

 */

void mei_cl_init(struct mei_cl *priv, struct mei_device *dev)

{

	memset(priv, 0, sizeof(struct mei_cl));

	init_waitqueue_head(&priv->wait);

	init_waitqueue_head(&priv->rx_wait);

	init_waitqueue_head(&priv->tx_wait);

	INIT_LIST_HEAD(&priv->link);

	priv->reading_state = MEI_IDLE;

	priv->writing_state = MEI_IDLE;

	priv->dev = dev;

}



int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid)

{

	int i, res = -ENOENT;



	for (i = 0; i < dev->me_clients_num; ++i)

		if (uuid_le_cmp(*cuuid,

				dev->me_clients[i].props.protocol_name) == 0) {

			res = i;

			break;

		}



	return res;

}





/**

 * mei_me_cl_link - create link between host and me clinet and add

 *   me_cl to the list

 *

 * @dev: the device structure

 * @cl: link between me and host client assocated with opened file descriptor

 * @cuuid: uuid of ME client

 * @client_id: id of the host client

 *

 * returns ME client index if ME client

 *	-EINVAL on incorrect values

 *	-ENONET if client not found

 */

int mei_me_cl_link(struct mei_device *dev, struct mei_cl *cl,

			const uuid_le *cuuid, u8 host_cl_id)

{

	int i;



	if (!dev || !cl || !cuuid)

		return -EINVAL;



	/* check for valid client id */

	i = mei_me_cl_by_uuid(dev, cuuid);

	if (i >= 0) {

		cl->me_client_id = dev->me_clients[i].client_id;

		cl->state = MEI_FILE_CONNECTING;

		cl->host_client_id = host_cl_id;



		list_add_tail(&cl->link, &dev->file_list);

		return (u8)i;

	}



	return -ENOENT;

}

/**

 * mei_me_cl_unlink - remove me_cl from the list

 *

 * @dev: the device structure

 * @host_client_id: host client id to be removed

 */

void mei_me_cl_unlink(struct mei_device *dev, struct mei_cl *cl)

{

	struct mei_cl *pos, *next;

	list_for_each_entry_safe(pos, next, &dev->file_list, link) {

		if (cl->host_client_id == pos->host_client_id) {

			dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n",

					pos->host_client_id, pos->me_client_id);

			list_del_init(&pos->link);

			break;

		}

	}

}



/**

 * mei_alloc_file_private - allocates a private file structure and sets it up.

 * @file: the file structure

 *

 * returns  The allocated file or NULL on failure

 */

struct mei_cl *mei_cl_allocate(struct mei_device *dev)

{

	struct mei_cl *cl;



	cl = kmalloc(sizeof(struct mei_cl), GFP_KERNEL);

	if (!cl)

		return NULL;



	mei_cl_init(cl, dev);



	return cl;

}







/**

 * mei_disconnect_host_client - sends disconnect message to fw from host client.

 *

 * @dev: the device structure

 * @cl: private data of the file object

 *

 * Locking: called under "dev->device_lock" lock

 *

 * returns 0 on success, <0 on failure.

 */

int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl)

{

	struct mei_cl_cb *cb;

	int rets, err;



	if (!dev || !cl)

		return -ENODEV;



	if (cl->state != MEI_FILE_DISCONNECTING)

		return 0;



	cb = mei_io_cb_init(cl, NULL);

	if (!cb)

		return -ENOMEM;



	cb->fop_type = MEI_FOP_CLOSE;

	if (dev->mei_host_buffer_is_empty) {

		dev->mei_host_buffer_is_empty = false;

		if (mei_hbm_cl_disconnect_req(dev, cl)) {

			rets = -ENODEV;

			dev_err(&dev->pdev->dev, "failed to disconnect.\n");

			goto free;

		}

		mdelay(10); /* Wait for hardware disconnection ready */

		list_add_tail(&cb->list, &dev->ctrl_rd_list.list);

	} else {

		dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n");

		list_add_tail(&cb->list, &dev->ctrl_wr_list.list);



	}

	mutex_unlock(&dev->device_lock);



	err = wait_event_timeout(dev->wait_recvd_msg,

			MEI_FILE_DISCONNECTED == cl->state,

			mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));



	mutex_lock(&dev->device_lock);

	if (MEI_FILE_DISCONNECTED == cl->state) {

		rets = 0;

		dev_dbg(&dev->pdev->dev, "successfully disconnected from FW client.\n");

	} else {

		rets = -ENODEV;

		if (MEI_FILE_DISCONNECTED != cl->state)

			dev_dbg(&dev->pdev->dev, "wrong status client disconnect.\n");



		if (err)

			dev_dbg(&dev->pdev->dev,

					"wait failed disconnect err=%08x\n",

					err);



		dev_dbg(&dev->pdev->dev, "failed to disconnect from FW client.\n");

	}



	mei_io_list_flush(&dev->ctrl_rd_list, cl);

	mei_io_list_flush(&dev->ctrl_wr_list, cl);

free:

	mei_io_cb_free(cb);

	return rets;

}

drivers/misc/mei/interface.c

+0 −96
Original line number Diff line number Diff line
@@ -297,99 +297,3 @@ void mei_read_slots(struct mei_device *dev, unsigned char *buffer, 
	mei_hcsr_set(dev);

}

/**

 * mei_flow_ctrl_creds - checks flow_control credentials.

 *

 * @dev: the device structure

 * @cl: private data of the file object

 *

 * returns 1 if mei_flow_ctrl_creds >0, 0 - otherwise.

 *	-ENOENT if mei_cl is not present

 *	-EINVAL if single_recv_buf == 0

 */

int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl)

{

	int i;



	if (!dev->me_clients_num)

		return 0;



	if (cl->mei_flow_ctrl_creds > 0)

		return 1;



	for (i = 0; i < dev->me_clients_num; i++) {

		struct mei_me_client  *me_cl = &dev->me_clients[i];

		if (me_cl->client_id == cl->me_client_id) {

			if (me_cl->mei_flow_ctrl_creds) {

				if (WARN_ON(me_cl->props.single_recv_buf == 0))

					return -EINVAL;

				return 1;

			} else {

				return 0;

			}

		}

	}

	return -ENOENT;

}



/**

 * mei_flow_ctrl_reduce - reduces flow_control.

 *

 * @dev: the device structure

 * @cl: private data of the file object

 * @returns

 *	0 on success

 *	-ENOENT when me client is not found

 *	-EINVAL when ctrl credits are <= 0

 */

int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl)

{

	int i;



	if (!dev->me_clients_num)

		return -ENOENT;



	for (i = 0; i < dev->me_clients_num; i++) {

		struct mei_me_client  *me_cl = &dev->me_clients[i];

		if (me_cl->client_id == cl->me_client_id) {

			if (me_cl->props.single_recv_buf != 0) {

				if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0))

					return -EINVAL;

				dev->me_clients[i].mei_flow_ctrl_creds--;

			} else {

				if (WARN_ON(cl->mei_flow_ctrl_creds <= 0))

					return -EINVAL;

				cl->mei_flow_ctrl_creds--;

			}

			return 0;

		}

	}

	return -ENOENT;

}





/**

 * mei_other_client_is_connecting - checks if other

 *    client with the same client id is connected.

 *

 * @dev: the device structure

 * @cl: private data of the file object

 *

 * returns 1 if other client is connected, 0 - otherwise.

 */

int mei_other_client_is_connecting(struct mei_device *dev,

				struct mei_cl *cl)

{

	struct mei_cl *cl_pos = NULL;

	struct mei_cl *cl_next = NULL;



	list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {

		if ((cl_pos->state == MEI_FILE_CONNECTING) &&

			(cl_pos != cl) &&

			cl->me_client_id == cl_pos->me_client_id)

			return 1;



	}

	return 0;

}