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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