1 /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
2 /*
3 * Copyright 2013-2016 Freescale Semiconductor, Inc.
4 * Copyright 2016-2017 NXP
5 */
6
7 #ifndef __SG_SW_QM_H
8 #define __SG_SW_QM_H
9
10 #include <soc/fsl/qman.h>
11 #include "regs.h"
12
__dma_to_qm_sg(struct qm_sg_entry * qm_sg_ptr,dma_addr_t dma,u16 offset)13 static inline void __dma_to_qm_sg(struct qm_sg_entry *qm_sg_ptr, dma_addr_t dma,
14 u16 offset)
15 {
16 qm_sg_entry_set64(qm_sg_ptr, dma);
17 qm_sg_ptr->__reserved2 = 0;
18 qm_sg_ptr->bpid = 0;
19 qm_sg_ptr->offset = cpu_to_be16(offset & QM_SG_OFF_MASK);
20 }
21
dma_to_qm_sg_one(struct qm_sg_entry * qm_sg_ptr,dma_addr_t dma,u32 len,u16 offset)22 static inline void dma_to_qm_sg_one(struct qm_sg_entry *qm_sg_ptr,
23 dma_addr_t dma, u32 len, u16 offset)
24 {
25 __dma_to_qm_sg(qm_sg_ptr, dma, offset);
26 qm_sg_entry_set_len(qm_sg_ptr, len);
27 }
28
dma_to_qm_sg_one_last(struct qm_sg_entry * qm_sg_ptr,dma_addr_t dma,u32 len,u16 offset)29 static inline void dma_to_qm_sg_one_last(struct qm_sg_entry *qm_sg_ptr,
30 dma_addr_t dma, u32 len, u16 offset)
31 {
32 __dma_to_qm_sg(qm_sg_ptr, dma, offset);
33 qm_sg_entry_set_f(qm_sg_ptr, len);
34 }
35
dma_to_qm_sg_one_ext(struct qm_sg_entry * qm_sg_ptr,dma_addr_t dma,u32 len,u16 offset)36 static inline void dma_to_qm_sg_one_ext(struct qm_sg_entry *qm_sg_ptr,
37 dma_addr_t dma, u32 len, u16 offset)
38 {
39 __dma_to_qm_sg(qm_sg_ptr, dma, offset);
40 qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | (len & QM_SG_LEN_MASK));
41 }
42
dma_to_qm_sg_one_last_ext(struct qm_sg_entry * qm_sg_ptr,dma_addr_t dma,u32 len,u16 offset)43 static inline void dma_to_qm_sg_one_last_ext(struct qm_sg_entry *qm_sg_ptr,
44 dma_addr_t dma, u32 len,
45 u16 offset)
46 {
47 __dma_to_qm_sg(qm_sg_ptr, dma, offset);
48 qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | QM_SG_FIN |
49 (len & QM_SG_LEN_MASK));
50 }
51
52 /*
53 * convert scatterlist to h/w link table format
54 * but does not have final bit; instead, returns last entry
55 */
56 static inline struct qm_sg_entry *
sg_to_qm_sg(struct scatterlist * sg,int len,struct qm_sg_entry * qm_sg_ptr,u16 offset)57 sg_to_qm_sg(struct scatterlist *sg, int len,
58 struct qm_sg_entry *qm_sg_ptr, u16 offset)
59 {
60 int ent_len;
61
62 while (len) {
63 ent_len = min_t(int, sg_dma_len(sg), len);
64
65 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), ent_len,
66 offset);
67 qm_sg_ptr++;
68 sg = sg_next(sg);
69 len -= ent_len;
70 }
71 return qm_sg_ptr - 1;
72 }
73
74 /*
75 * convert scatterlist to h/w link table format
76 * scatterlist must have been previously dma mapped
77 */
sg_to_qm_sg_last(struct scatterlist * sg,int len,struct qm_sg_entry * qm_sg_ptr,u16 offset)78 static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
79 struct qm_sg_entry *qm_sg_ptr, u16 offset)
80 {
81 qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);
82 qm_sg_entry_set_f(qm_sg_ptr, qm_sg_entry_get_len(qm_sg_ptr));
83 }
84
85 #endif /* __SG_SW_QM_H */
86