qlt_dma.h revision 4558d122136f151d62acbbc02ddb42df89a5ef66
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 QLogic Corporation. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#ifndef _QLT_DMA_H
#define _QLT_DMA_H
#include <sys/stmf.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* DMA memory object.
*/
#define QLT_DMA_SG_LIST_LENGTH 1270
#define CMD7_2400_DATA_SEGMENTS 1
#define CONT_A64_DATA_SEGMENTS 5
/*
* Container for ddi_dma_handle
*
* These elements are either linked to an active dbuf or in the free list.
*/
struct qlt_dma_handle {
struct qlt_dma_handle *next;
ddi_dma_handle_t dma_handle;
ddi_dma_cookie_t first_cookie;
uint_t num_cookies;
uint_t num_cookies_fetched;
};
typedef struct qlt_dma_handle qlt_dma_handle_t;
/*
* The dbuf private data when using a scatter/gather list.
*/
struct qlt_dma_sgl {
uint16_t handle_count;
uint16_t cookie_count;
uint16_t cookie_next_fetch;
uint16_t cookie_prefetched;
qlt_dma_handle_t *handle_list;
qlt_dma_handle_t *handle_next_fetch;
size_t qsize;
ddi_dma_cookie_t cookie[1];
};
typedef struct qlt_dma_sgl qlt_dma_sgl_t;
/*
* Structure to maintain ddi_dma_handle free pool.
*/
struct qlt_dma_handle_pool {
kmutex_t pool_lock; /* protects all fields */
qlt_dma_handle_t *free_list;
int num_free;
int num_total;
};
typedef struct qlt_dma_handle_pool qlt_dma_handle_pool_t;
struct qlt_dmem_bucket;
typedef struct qlt_dmem_bctl {
struct qlt_dmem_bucket *bctl_bucket;
struct qlt_dmem_bctl *bctl_next;
uint64_t bctl_dev_addr;
uint8_t bctl_task_ndx; /* notused */
stmf_data_buf_t *bctl_buf;
} qlt_dmem_bctl_t;
typedef struct qlt_dmem_bucket {
uint32_t dmem_buf_size;
uint32_t dmem_nbufs;
uint32_t dmem_nbufs_free;
uint8_t *dmem_host_addr;
uint64_t dmem_dev_addr;
ddi_dma_handle_t dmem_dma_handle;
ddi_acc_handle_t dmem_acc_handle;
kmutex_t dmem_lock;
qlt_dmem_bctl_t *dmem_bctl_free_list;
void *dmem_bctls_mem;
} qlt_dmem_bucket_t;
fct_status_t qlt_dmem_init(qlt_state_t *qlt);
void qlt_dmem_fini(qlt_state_t *qlt);
void qlt_dma_handle_pool_init(qlt_state_t *qlt);
void qlt_dma_handle_pool_fini(qlt_state_t *qlt);
stmf_data_buf_t *qlt_dmem_alloc(fct_local_port_t *port, uint32_t size,
uint32_t *pminsize, uint32_t flags);
stmf_data_buf_t *qlt_i_dmem_alloc(qlt_state_t *qlt, uint32_t size,
uint32_t *pminsize, uint32_t flags);
void qlt_dmem_free(fct_dbuf_store_t *fds, stmf_data_buf_t *dbuf);
void qlt_i_dmem_free(qlt_state_t *qlt, stmf_data_buf_t *dbuf);
stmf_status_t qlt_dma_setup_dbuf(fct_local_port_t *port,
stmf_data_buf_t *dbuf, uint32_t flags);
void qlt_dma_teardown_dbuf(fct_dbuf_store_t *fds, stmf_data_buf_t *dbuf);
void qlt_dmem_dma_sync(stmf_data_buf_t *dbuf, uint_t sync_type);
uint8_t qlt_get_iocb_count(uint32_t cookie_cnt);
uint64_t qlt_ddi_vtop(caddr_t vaddr);
/*
* XXX move the following into the fct layer
*/
uint16_t qlt_get_cookie_count(stmf_data_buf_t *dbuf);
void qlt_ddi_dma_nextcookie(stmf_data_buf_t *dbuf, ddi_dma_cookie_t *cookie_p);
ddi_dma_cookie_t *qlt_get_cookie_array(stmf_data_buf_t *dbuf);
#ifdef __cplusplus
}
#endif
#endif /* _QLT_DMA_H */