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ca8c5584e0
add a per channel waitqueue to be able to have more than one ringbuffer entry in flight. Signed-off-by: Sven Schnelle <svens@stackframe.org>
53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
/*
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* Broadcom PCIe 1570 webcam driver
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*
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* Copyright (C) 2015 Sven Schnelle <svens@stackframe.org>
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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 of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation.
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*
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*/
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#ifndef _FTHD_RINGBUF_H
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#define _FTHD_RINGBUF_H
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#define FTHD_RINGBUF_ENTRY_SIZE 64
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#define FTHD_RINGBUF_ADDRESS_FLAGS 0
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#define FTHD_RINGBUF_REQUEST_SIZE 4
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#define FTHD_RINGBUF_RESPONSE_SIZE 8
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enum ringbuf_type_t {
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RINGBUF_TYPE_H2T=0,
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RINGBUF_TYPE_T2H=1,
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RINGBUF_TYPE_UNIDIRECTIONAL,
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};
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struct fthd_ringbuf {
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void *doorbell;
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int idx;
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};
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struct fw_channel;
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struct fthd_private;
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extern void fthd_channel_ringbuf_dump(struct fthd_private *dev_priv, struct fw_channel *chan);
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extern void fthd_channel_ringbuf_init(struct fthd_private *dev_priv, struct fw_channel *chan);
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extern u32 fthd_channel_ringbuf_get_entry(struct fthd_private *, struct fw_channel *);
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extern int fthd_channel_ringbuf_send(struct fthd_private *dev_priv, struct fw_channel *chan,
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u32 data_offset, u32 request_size, u32 response_size, u32 *entry);
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extern u32 fthd_channel_ringbuf_receive(struct fthd_private *dev_priv,
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struct fw_channel *chan);
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extern int fthd_channel_wait_ready(struct fthd_private *dev_priv, struct fw_channel *chan, u32 entry, int timeout);
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#endif
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