forked from Minki/linux
e2b31644e9
Bus layer omitted check for client state transition while waiting for read completion The client state transition may occur for example as result of firmware initiated reset Add mei_cl_is_transitioning wrapper to reduce the code repetition.: Cc: <stable@vger.kernel.org> # 3.9+ Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
119 lines
3.3 KiB
C
119 lines
3.3 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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#ifndef _MEI_CLIENT_H_
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#define _MEI_CLIENT_H_
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#include <linux/types.h>
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#include <linux/watchdog.h>
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#include <linux/poll.h>
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#include <linux/mei.h>
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#include "mei_dev.h"
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int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid);
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int mei_me_cl_by_id(struct mei_device *dev, u8 client_id);
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/*
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* MEI IO Functions
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*/
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struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp);
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void mei_io_cb_free(struct mei_cl_cb *priv_cb);
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int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length);
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int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length);
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/**
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* mei_io_list_init - Sets up a queue list.
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*
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* @list: An instance cl callback structure
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*/
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static inline void mei_io_list_init(struct mei_cl_cb *list)
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{
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INIT_LIST_HEAD(&list->list);
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}
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void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl);
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/*
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* MEI Host Client Functions
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*/
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struct mei_cl *mei_cl_allocate(struct mei_device *dev);
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void mei_cl_init(struct mei_cl *cl, struct mei_device *dev);
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int mei_cl_link(struct mei_cl *cl, int id);
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int mei_cl_unlink(struct mei_cl *cl);
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int mei_cl_flush_queues(struct mei_cl *cl);
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struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl);
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/**
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* mei_cl_cmp_id - tells if file private data have same id
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*
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* @fe1: private data of 1. file object
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* @fe2: private data of 2. file object
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*
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* returns true - if ids are the same and not NULL
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*/
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static inline bool mei_cl_cmp_id(const struct mei_cl *cl1,
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const struct mei_cl *cl2)
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{
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return cl1 && cl2 &&
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(cl1->host_client_id == cl2->host_client_id) &&
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(cl1->me_client_id == cl2->me_client_id);
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}
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int mei_cl_flow_ctrl_creds(struct mei_cl *cl);
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int mei_cl_flow_ctrl_reduce(struct mei_cl *cl);
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/*
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* MEI input output function prototype
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*/
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static inline bool mei_cl_is_connected(struct mei_cl *cl)
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{
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return (cl->dev &&
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cl->dev->dev_state == MEI_DEV_ENABLED &&
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cl->state == MEI_FILE_CONNECTED);
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}
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static inline bool mei_cl_is_transitioning(struct mei_cl *cl)
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{
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return (MEI_FILE_INITIALIZING == cl->state ||
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MEI_FILE_DISCONNECTED == cl->state ||
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MEI_FILE_DISCONNECTING == cl->state);
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}
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bool mei_cl_is_other_connecting(struct mei_cl *cl);
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int mei_cl_disconnect(struct mei_cl *cl);
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int mei_cl_connect(struct mei_cl *cl, struct file *file);
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int mei_cl_read_start(struct mei_cl *cl, size_t length);
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int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking);
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int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
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s32 *slots, struct mei_cl_cb *cmpl_list);
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void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
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void mei_host_client_init(struct work_struct *work);
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void mei_cl_all_disconnect(struct mei_device *dev);
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void mei_cl_all_wakeup(struct mei_device *dev);
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void mei_cl_all_write_clear(struct mei_device *dev);
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#endif /* _MEI_CLIENT_H_ */
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