mirror of
https://github.com/torvalds/linux.git
synced 2024-11-17 09:31:50 +00:00
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>
107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2005 Ammasso, Inc. All rights reserved.
|
|
* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* OpenIB.org BSD license below:
|
|
*
|
|
* 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.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#ifndef _C2_MQ_H_
|
|
#define _C2_MQ_H_
|
|
#include <linux/kernel.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include "c2_wr.h"
|
|
|
|
enum c2_shared_regs {
|
|
|
|
C2_SHARED_ARMED = 0x10,
|
|
C2_SHARED_NOTIFY = 0x18,
|
|
C2_SHARED_SHARED = 0x40,
|
|
};
|
|
|
|
struct c2_mq_shared {
|
|
u16 unused1;
|
|
u8 armed;
|
|
u8 notification_type;
|
|
u32 unused2;
|
|
u16 shared;
|
|
/* Pad to 64 bytes. */
|
|
u8 pad[64 - sizeof(u16) - 2 * sizeof(u8) - sizeof(u32) - sizeof(u16)];
|
|
};
|
|
|
|
enum c2_mq_type {
|
|
C2_MQ_HOST_TARGET = 1,
|
|
C2_MQ_ADAPTER_TARGET = 2,
|
|
};
|
|
|
|
/*
|
|
* c2_mq_t is for kernel-mode MQs like the VQs Cand the AEQ.
|
|
* c2_user_mq_t (which is the same format) is for user-mode MQs...
|
|
*/
|
|
#define C2_MQ_MAGIC 0x4d512020 /* 'MQ ' */
|
|
struct c2_mq {
|
|
u32 magic;
|
|
union {
|
|
u8 *host;
|
|
u8 __iomem *adapter;
|
|
} msg_pool;
|
|
dma_addr_t host_dma;
|
|
DEFINE_DMA_UNMAP_ADDR(mapping);
|
|
u16 hint_count;
|
|
u16 priv;
|
|
struct c2_mq_shared __iomem *peer;
|
|
__be16 *shared;
|
|
dma_addr_t shared_dma;
|
|
u32 q_size;
|
|
u32 msg_size;
|
|
u32 index;
|
|
enum c2_mq_type type;
|
|
};
|
|
|
|
static __inline__ int c2_mq_empty(struct c2_mq *q)
|
|
{
|
|
return q->priv == be16_to_cpu(*q->shared);
|
|
}
|
|
|
|
static __inline__ int c2_mq_full(struct c2_mq *q)
|
|
{
|
|
return q->priv == (be16_to_cpu(*q->shared) + q->q_size - 1) % q->q_size;
|
|
}
|
|
|
|
extern void c2_mq_lconsume(struct c2_mq *q, u32 wqe_count);
|
|
extern void *c2_mq_alloc(struct c2_mq *q);
|
|
extern void c2_mq_produce(struct c2_mq *q);
|
|
extern void *c2_mq_consume(struct c2_mq *q);
|
|
extern void c2_mq_free(struct c2_mq *q);
|
|
extern void c2_mq_req_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size,
|
|
u8 __iomem *pool_start, u16 __iomem *peer, u32 type);
|
|
extern void c2_mq_rep_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size,
|
|
u8 *pool_start, u16 __iomem *peer, u32 type);
|
|
|
|
#endif /* _C2_MQ_H_ */
|