137 lines
4.4 KiB
C
137 lines
4.4 KiB
C
/*
|
|
* Copyright(c) 2016 Intel Corporation.
|
|
*
|
|
* This file is provided under a dual BSD/GPLv2 license. When using or
|
|
* redistributing this file, you may do so under either license.
|
|
*
|
|
* GPL LICENSE SUMMARY
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* BSD LICENSE
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* - Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* - Neither the name of Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#ifndef HFI1_SDMA_TXREQ_H
|
|
#define HFI1_SDMA_TXREQ_H
|
|
|
|
/* increased for AHG */
|
|
#define NUM_DESC 6
|
|
|
|
/*
|
|
* struct sdma_desc - canonical fragment descriptor
|
|
*
|
|
* This is the descriptor carried in the tx request
|
|
* corresponding to each fragment.
|
|
*
|
|
*/
|
|
struct sdma_desc {
|
|
/* private: don't use directly */
|
|
u64 qw[2];
|
|
};
|
|
|
|
/**
|
|
* struct sdma_txreq - the sdma_txreq structure (one per packet)
|
|
* @list: for use by user and by queuing for wait
|
|
*
|
|
* This is the representation of a packet which consists of some
|
|
* number of fragments. Storage is provided to within the structure.
|
|
* for all fragments.
|
|
*
|
|
* The storage for the descriptors are automatically extended as needed
|
|
* when the currently allocation is exceeded.
|
|
*
|
|
* The user (Verbs or PSM) may overload this structure with fields
|
|
* specific to their use by putting this struct first in their struct.
|
|
* The method of allocation of the overloaded structure is user dependent
|
|
*
|
|
* The list is the only public field in the structure.
|
|
*
|
|
*/
|
|
|
|
#define SDMA_TXREQ_S_OK 0
|
|
#define SDMA_TXREQ_S_SENDERROR 1
|
|
#define SDMA_TXREQ_S_ABORTED 2
|
|
#define SDMA_TXREQ_S_SHUTDOWN 3
|
|
|
|
/* flags bits */
|
|
#define SDMA_TXREQ_F_URGENT 0x0001
|
|
#define SDMA_TXREQ_F_AHG_COPY 0x0002
|
|
#define SDMA_TXREQ_F_USE_AHG 0x0004
|
|
#define SDMA_TXREQ_F_VIP 0x0010
|
|
|
|
struct sdma_txreq;
|
|
typedef void (*callback_t)(struct sdma_txreq *, int);
|
|
|
|
struct iowait;
|
|
struct sdma_txreq {
|
|
struct list_head list;
|
|
/* private: */
|
|
struct sdma_desc *descp;
|
|
/* private: */
|
|
void *coalesce_buf;
|
|
/* private: */
|
|
struct iowait *wait;
|
|
/* private: */
|
|
callback_t complete;
|
|
#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
|
|
u64 sn;
|
|
#endif
|
|
/* private: - used in coalesce/pad processing */
|
|
u16 packet_len;
|
|
/* private: - down-counted to trigger last */
|
|
u16 tlen;
|
|
/* private: */
|
|
u16 num_desc;
|
|
/* private: */
|
|
u16 desc_limit;
|
|
/* private: */
|
|
u16 next_descq_idx;
|
|
/* private: */
|
|
u16 coalesce_idx;
|
|
/* private: flags */
|
|
u16 flags;
|
|
/* private: */
|
|
struct sdma_desc descs[NUM_DESC];
|
|
};
|
|
|
|
static inline int sdma_txreq_built(struct sdma_txreq *tx)
|
|
{
|
|
return tx->num_desc;
|
|
}
|
|
|
|
#endif /* HFI1_SDMA_TXREQ_H */
|