xref: /openbmc/linux/drivers/crypto/caam/sg_sw_qm.h (revision 4da722ca)
1 /*
2  * Copyright 2013-2016 Freescale Semiconductor, Inc.
3  * Copyright 2016-2017 NXP
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *     * Redistributions of source code must retain the above copyright
8  *       notice, this list of conditions and the following disclaimer.
9  *     * Redistributions in binary form must reproduce the above copyright
10  *       notice, this list of conditions and the following disclaimer in the
11  *       documentation and/or other materials provided with the distribution.
12  *     * Neither the name of Freescale Semiconductor nor the
13  *       names of its contributors may be used to endorse or promote products
14  *       derived from this software without specific prior written permission.
15  *
16  *
17  * ALTERNATIVELY, this software may be distributed under the terms of the
18  * GNU General Public License ("GPL") as published by the Free Software
19  * Foundation, either version 2 of that License or (at your option) any
20  * later version.
21  *
22  * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
23  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25  * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
26  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
29  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 #ifndef __SG_SW_QM_H
35 #define __SG_SW_QM_H
36 
37 #include <soc/fsl/qman.h>
38 #include "regs.h"
39 
40 static inline void __dma_to_qm_sg(struct qm_sg_entry *qm_sg_ptr, dma_addr_t dma,
41 				  u16 offset)
42 {
43 	qm_sg_entry_set64(qm_sg_ptr, dma);
44 	qm_sg_ptr->__reserved2 = 0;
45 	qm_sg_ptr->bpid = 0;
46 	qm_sg_ptr->offset = cpu_to_be16(offset & QM_SG_OFF_MASK);
47 }
48 
49 static inline void dma_to_qm_sg_one(struct qm_sg_entry *qm_sg_ptr,
50 				    dma_addr_t dma, u32 len, u16 offset)
51 {
52 	__dma_to_qm_sg(qm_sg_ptr, dma, offset);
53 	qm_sg_entry_set_len(qm_sg_ptr, len);
54 }
55 
56 static inline void dma_to_qm_sg_one_last(struct qm_sg_entry *qm_sg_ptr,
57 					 dma_addr_t dma, u32 len, u16 offset)
58 {
59 	__dma_to_qm_sg(qm_sg_ptr, dma, offset);
60 	qm_sg_entry_set_f(qm_sg_ptr, len);
61 }
62 
63 static inline void dma_to_qm_sg_one_ext(struct qm_sg_entry *qm_sg_ptr,
64 					dma_addr_t dma, u32 len, u16 offset)
65 {
66 	__dma_to_qm_sg(qm_sg_ptr, dma, offset);
67 	qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | (len & QM_SG_LEN_MASK));
68 }
69 
70 static inline void dma_to_qm_sg_one_last_ext(struct qm_sg_entry *qm_sg_ptr,
71 					     dma_addr_t dma, u32 len,
72 					     u16 offset)
73 {
74 	__dma_to_qm_sg(qm_sg_ptr, dma, offset);
75 	qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | QM_SG_FIN |
76 				     (len & QM_SG_LEN_MASK));
77 }
78 
79 /*
80  * convert scatterlist to h/w link table format
81  * but does not have final bit; instead, returns last entry
82  */
83 static inline struct qm_sg_entry *
84 sg_to_qm_sg(struct scatterlist *sg, int sg_count,
85 	    struct qm_sg_entry *qm_sg_ptr, u16 offset)
86 {
87 	while (sg_count && sg) {
88 		dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
89 				 sg_dma_len(sg), offset);
90 		qm_sg_ptr++;
91 		sg = sg_next(sg);
92 		sg_count--;
93 	}
94 	return qm_sg_ptr - 1;
95 }
96 
97 /*
98  * convert scatterlist to h/w link table format
99  * scatterlist must have been previously dma mapped
100  */
101 static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
102 				    struct qm_sg_entry *qm_sg_ptr, u16 offset)
103 {
104 	qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
105 	qm_sg_entry_set_f(qm_sg_ptr, qm_sg_entry_get_len(qm_sg_ptr));
106 }
107 
108 #endif /* __SG_SW_QM_H */
109