xref: /titanic_41/usr/src/uts/common/io/comstar/port/qlt/qlt_dma.h (revision 4558d122136f151d62acbbc02ddb42df89a5ef66)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2009 QLogic Corporation.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*
28  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
29  */
30 
31 #ifndef	_QLT_DMA_H
32 #define	_QLT_DMA_H
33 
34 #include <sys/stmf.h>
35 
36 #ifdef	__cplusplus
37 extern "C" {
38 #endif
39 
40 /*
41  * DMA memory object.
42  */
43 #define	QLT_DMA_SG_LIST_LENGTH	1270
44 #define	CMD7_2400_DATA_SEGMENTS	1
45 #define	CONT_A64_DATA_SEGMENTS	5
46 
47 
48 /*
49  * Container for ddi_dma_handle
50  *
51  * These elements are either linked to an active dbuf or in the free list.
52  */
53 struct qlt_dma_handle {
54 	struct qlt_dma_handle	*next;
55 	ddi_dma_handle_t	dma_handle;
56 	ddi_dma_cookie_t	first_cookie;
57 	uint_t			num_cookies;
58 	uint_t			num_cookies_fetched;
59 };
60 
61 typedef struct qlt_dma_handle qlt_dma_handle_t;
62 
63 /*
64  * The dbuf private data when using a scatter/gather list.
65  */
66 struct qlt_dma_sgl {
67 	uint16_t		handle_count;
68 	uint16_t		cookie_count;
69 	uint16_t		cookie_next_fetch;
70 	uint16_t		cookie_prefetched;
71 	qlt_dma_handle_t	*handle_list;
72 	qlt_dma_handle_t	*handle_next_fetch;
73 	size_t			qsize;
74 	ddi_dma_cookie_t	cookie[1];
75 };
76 
77 typedef struct qlt_dma_sgl qlt_dma_sgl_t;
78 
79 /*
80  * Structure to maintain ddi_dma_handle free pool.
81  */
82 struct qlt_dma_handle_pool {
83 	kmutex_t		pool_lock;	/* protects all fields */
84 	qlt_dma_handle_t	*free_list;
85 	int			num_free;
86 	int			num_total;
87 };
88 
89 typedef struct qlt_dma_handle_pool qlt_dma_handle_pool_t;
90 
91 struct qlt_dmem_bucket;
92 
93 typedef struct qlt_dmem_bctl {
94 	struct qlt_dmem_bucket	*bctl_bucket;
95 	struct qlt_dmem_bctl	*bctl_next;
96 	uint64_t		bctl_dev_addr;
97 	uint8_t			bctl_task_ndx;	/* notused */
98 	stmf_data_buf_t		*bctl_buf;
99 } qlt_dmem_bctl_t;
100 
101 typedef struct qlt_dmem_bucket {
102 	uint32_t		dmem_buf_size;
103 	uint32_t		dmem_nbufs;
104 	uint32_t		dmem_nbufs_free;
105 	uint8_t			*dmem_host_addr;
106 	uint64_t		dmem_dev_addr;
107 	ddi_dma_handle_t	dmem_dma_handle;
108 	ddi_acc_handle_t	dmem_acc_handle;
109 	kmutex_t		dmem_lock;
110 	qlt_dmem_bctl_t		*dmem_bctl_free_list;
111 	void			*dmem_bctls_mem;
112 } qlt_dmem_bucket_t;
113 
114 fct_status_t qlt_dmem_init(qlt_state_t *qlt);
115 void qlt_dmem_fini(qlt_state_t *qlt);
116 void qlt_dma_handle_pool_init(qlt_state_t *qlt);
117 void qlt_dma_handle_pool_fini(qlt_state_t *qlt);
118 stmf_data_buf_t *qlt_dmem_alloc(fct_local_port_t *port, uint32_t size,
119     uint32_t *pminsize, uint32_t flags);
120 stmf_data_buf_t *qlt_i_dmem_alloc(qlt_state_t *qlt, uint32_t size,
121     uint32_t *pminsize, uint32_t flags);
122 void qlt_dmem_free(fct_dbuf_store_t *fds, stmf_data_buf_t *dbuf);
123 void qlt_i_dmem_free(qlt_state_t *qlt, stmf_data_buf_t *dbuf);
124 stmf_status_t qlt_dma_setup_dbuf(fct_local_port_t *port,
125     stmf_data_buf_t *dbuf, uint32_t flags);
126 void qlt_dma_teardown_dbuf(fct_dbuf_store_t *fds, stmf_data_buf_t *dbuf);
127 void qlt_dmem_dma_sync(stmf_data_buf_t *dbuf, uint_t sync_type);
128 uint8_t qlt_get_iocb_count(uint32_t cookie_cnt);
129 uint64_t qlt_ddi_vtop(caddr_t vaddr);
130 /*
131  * XXX move the following into the fct layer
132  */
133 uint16_t qlt_get_cookie_count(stmf_data_buf_t *dbuf);
134 void qlt_ddi_dma_nextcookie(stmf_data_buf_t *dbuf, ddi_dma_cookie_t *cookie_p);
135 ddi_dma_cookie_t *qlt_get_cookie_array(stmf_data_buf_t *dbuf);
136 
137 
138 #ifdef	__cplusplus
139 }
140 #endif
141 
142 #endif /* _QLT_DMA_H */
143