e749444057
The DMA API is preferred; no functional change. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Roland Dreier <rolandd@cisco.com>
106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
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* Copyright (c) 2005 Ammasso, Inc. All rights reserved.
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* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _C2_MQ_H_
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#define _C2_MQ_H_
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#include <linux/kernel.h>
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#include <linux/dma-mapping.h>
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#include "c2_wr.h"
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enum c2_shared_regs {
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C2_SHARED_ARMED = 0x10,
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C2_SHARED_NOTIFY = 0x18,
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C2_SHARED_SHARED = 0x40,
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};
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struct c2_mq_shared {
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u16 unused1;
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u8 armed;
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u8 notification_type;
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u32 unused2;
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u16 shared;
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/* Pad to 64 bytes. */
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u8 pad[64 - sizeof(u16) - 2 * sizeof(u8) - sizeof(u32) - sizeof(u16)];
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};
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enum c2_mq_type {
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C2_MQ_HOST_TARGET = 1,
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C2_MQ_ADAPTER_TARGET = 2,
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};
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/*
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* c2_mq_t is for kernel-mode MQs like the VQs Cand the AEQ.
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* c2_user_mq_t (which is the same format) is for user-mode MQs...
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*/
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#define C2_MQ_MAGIC 0x4d512020 /* 'MQ ' */
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struct c2_mq {
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u32 magic;
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union {
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u8 *host;
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u8 __iomem *adapter;
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} msg_pool;
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dma_addr_t host_dma;
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DEFINE_DMA_UNMAP_ADDR(mapping);
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u16 hint_count;
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u16 priv;
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struct c2_mq_shared __iomem *peer;
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__be16 *shared;
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dma_addr_t shared_dma;
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u32 q_size;
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u32 msg_size;
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u32 index;
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enum c2_mq_type type;
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};
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static __inline__ int c2_mq_empty(struct c2_mq *q)
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{
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return q->priv == be16_to_cpu(*q->shared);
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}
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static __inline__ int c2_mq_full(struct c2_mq *q)
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{
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return q->priv == (be16_to_cpu(*q->shared) + q->q_size - 1) % q->q_size;
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}
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extern void c2_mq_lconsume(struct c2_mq *q, u32 wqe_count);
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extern void *c2_mq_alloc(struct c2_mq *q);
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extern void c2_mq_produce(struct c2_mq *q);
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extern void *c2_mq_consume(struct c2_mq *q);
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extern void c2_mq_free(struct c2_mq *q);
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extern void c2_mq_req_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size,
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u8 __iomem *pool_start, u16 __iomem *peer, u32 type);
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extern void c2_mq_rep_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size,
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u8 *pool_start, u16 __iomem *peer, u32 type);
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#endif /* _C2_MQ_H_ */
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