[linux-2.6-block.git] / drivers / staging / rdma / amso1100 / c2_mq.h

/*
 * 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;
}

void c2_mq_lconsume(struct c2_mq *q, u32 wqe_count);
void *c2_mq_alloc(struct c2_mq *q);
void c2_mq_produce(struct c2_mq *q);
void *c2_mq_consume(struct c2_mq *q);
void c2_mq_free(struct c2_mq *q);
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);
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_ */
Commit	Line	Data
f94b533d TT	1	/*
	2	* Copyright (c) 2005 Ammasso, Inc. All rights reserved.
	3	* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
	4	*
	5	* This software is available to you under a choice of one of two
	6	* licenses. You may choose to be licensed under the terms of the GNU
	7	* General Public License (GPL) Version 2, available from the file
	8	* COPYING in the main directory of this source tree, or the
	9	* OpenIB.org BSD license below:
	10	*
	11	* Redistribution and use in source and binary forms, with or
	12	* without modification, are permitted provided that the following
	13	* conditions are met:
	14	*
	15	* - Redistributions of source code must retain the above
	16	* copyright notice, this list of conditions and the following
	17	* disclaimer.
	18	*
	19	* - Redistributions in binary form must reproduce the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer in the documentation and/or other materials
	22	* provided with the distribution.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	25	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	26	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	27	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	28	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	29	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	30	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	31	* SOFTWARE.
	32	*/
	33
	34	#ifndef _C2_MQ_H_
	35	#define _C2_MQ_H_
	36	#include <linux/kernel.h>
	37	#include <linux/dma-mapping.h>
	38	#include "c2_wr.h"
	39
	40	enum c2_shared_regs {
	41
	42	C2_SHARED_ARMED = 0x10,
	43	C2_SHARED_NOTIFY = 0x18,
	44	C2_SHARED_SHARED = 0x40,
	45	};
	46
	47	struct c2_mq_shared {
	48	u16 unused1;
	49	u8 armed;
	50	u8 notification_type;
	51	u32 unused2;
	52	u16 shared;
	53	/* Pad to 64 bytes. */
	54	u8 pad[64 - sizeof(u16) - 2 * sizeof(u8) - sizeof(u32) - sizeof(u16)];
	55	};
	56
	57	enum c2_mq_type {
	58	C2_MQ_HOST_TARGET = 1,
	59	C2_MQ_ADAPTER_TARGET = 2,
	60	};
	61
	62	/*
	63	* c2_mq_t is for kernel-mode MQs like the VQs Cand the AEQ.
	64	* c2_user_mq_t (which is the same format) is for user-mode MQs...
65	*/
66	#define C2_MQ_MAGIC 0x4d512020 /* 'MQ ' */
67	struct c2_mq {
68	u32 magic;
69	union {
70	u8 *host;
71	u8 __iomem *adapter;
72	} msg_pool;
73	dma_addr_t host_dma;
e7494440	74	DEFINE_DMA_UNMAP_ADDR(mapping);
f94b533d TT	75	u16 hint_count;
	76	u16 priv;
	77	struct c2_mq_shared __iomem *peer;
dc544bc9	78	__be16 *shared;
f94b533d TT	79	dma_addr_t shared_dma;
	80	u32 q_size;
	81	u32 msg_size;
	82	u32 index;
	83	enum c2_mq_type type;
	84	};
	85
	86	static __inline__ int c2_mq_empty(struct c2_mq *q)
	87	{
	88	return q->priv == be16_to_cpu(*q->shared);
	89	}
	90
	91	static __inline__ int c2_mq_full(struct c2_mq *q)
	92	{
	93	return q->priv == (be16_to_cpu(*q->shared) + q->q_size - 1) % q->q_size;
	94	}
	95
99d19626 AKC	96	void c2_mq_lconsume(struct c2_mq *q, u32 wqe_count);
	97	void c2_mq_alloc(struct c2_mq q);
	98	void c2_mq_produce(struct c2_mq *q);
	99	void c2_mq_consume(struct c2_mq q);
	100	void c2_mq_free(struct c2_mq *q);
	101	void c2_mq_req_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size,
f94b533d	102	u8 __iomem pool_start, u16 __iomem peer, u32 type);
99d19626	103	void c2_mq_rep_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size,
f94b533d TT	104	u8 pool_start, u16 __iomem peer, u32 type);
	105
	106	#endif /* _C2_MQ_H_ */