1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * CAAM/SEC 4.x functions for using scatterlists in caam driver 4 * 5 * Copyright 2008-2011 Freescale Semiconductor, Inc. 6 * 7 */ 8 9 #ifndef _SG_SW_SEC4_H_ 10 #define _SG_SW_SEC4_H_ 11 12 #include "ctrl.h" 13 #include "regs.h" 14 #include "sg_sw_qm2.h" 15 #include "../../../drivers/staging/fsl-mc/include/dpaa2-fd.h" 16 17 struct sec4_sg_entry { 18 u64 ptr; 19 u32 len; 20 u32 bpid_offset; 21 }; 22 23 /* 24 * convert single dma address to h/w link table format 25 */ 26 static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr, 27 dma_addr_t dma, u32 len, u16 offset) 28 { 29 if (caam_dpaa2) { 30 dma_to_qm_sg_one((struct dpaa2_sg_entry *)sec4_sg_ptr, dma, len, 31 offset); 32 } else { 33 sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma); 34 sec4_sg_ptr->len = cpu_to_caam32(len); 35 sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset & 36 SEC4_SG_OFFSET_MASK); 37 } 38 #ifdef DEBUG 39 print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ", 40 DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr, 41 sizeof(struct sec4_sg_entry), 1); 42 #endif 43 } 44 45 /* 46 * convert scatterlist to h/w link table format 47 * but does not have final bit; instead, returns last entry 48 */ 49 static inline struct sec4_sg_entry * 50 sg_to_sec4_sg(struct scatterlist *sg, int sg_count, 51 struct sec4_sg_entry *sec4_sg_ptr, u16 offset) 52 { 53 while (sg_count) { 54 dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), 55 sg_dma_len(sg), offset); 56 sec4_sg_ptr++; 57 sg = sg_next(sg); 58 sg_count--; 59 } 60 return sec4_sg_ptr - 1; 61 } 62 63 static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr) 64 { 65 if (caam_dpaa2) 66 dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true); 67 else 68 sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN); 69 } 70 71 /* 72 * convert scatterlist to h/w link table format 73 * scatterlist must have been previously dma mapped 74 */ 75 static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count, 76 struct sec4_sg_entry *sec4_sg_ptr, 77 u16 offset) 78 { 79 sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset); 80 sg_to_sec4_set_last(sec4_sg_ptr); 81 } 82 83 #endif /* _SG_SW_SEC4_H_ */ 84