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 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 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 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 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 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 * 57 sg_to_qm_sg(struct scatterlist *sg, int sg_count, 58 struct qm_sg_entry *qm_sg_ptr, u16 offset) 59 { 60 while (sg_count && sg) { 61 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), 62 sg_dma_len(sg), offset); 63 qm_sg_ptr++; 64 sg = sg_next(sg); 65 sg_count--; 66 } 67 return qm_sg_ptr - 1; 68 } 69 70 /* 71 * convert scatterlist to h/w link table format 72 * scatterlist must have been previously dma mapped 73 */ 74 static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count, 75 struct qm_sg_entry *qm_sg_ptr, u16 offset) 76 { 77 qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset); 78 qm_sg_entry_set_f(qm_sg_ptr, qm_sg_entry_get_len(qm_sg_ptr)); 79 } 80 81 #endif /* __SG_SW_QM_H */ 82