86 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * CAAM/SEC 4.x functions for using scatterlists in caam driver4 *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 <soc/fsl/dpaa2-fd.h>16 17struct 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 format25 */26static 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 39 print_hex_dump_debug("sec4_sg_ptr@: ", DUMP_PREFIX_ADDRESS, 16, 4,40 sec4_sg_ptr, sizeof(struct sec4_sg_entry), 1);41}42 43/*44 * convert scatterlist to h/w link table format45 * but does not have final bit; instead, returns last entry46 */47static inline struct sec4_sg_entry *48sg_to_sec4_sg(struct scatterlist *sg, int len,49 struct sec4_sg_entry *sec4_sg_ptr, u16 offset)50{51 int ent_len;52 53 while (len) {54 ent_len = min_t(int, sg_dma_len(sg), len);55 56 dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), ent_len,57 offset);58 sec4_sg_ptr++;59 sg = sg_next(sg);60 len -= ent_len;61 }62 return sec4_sg_ptr - 1;63}64 65static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr)66{67 if (caam_dpaa2)68 dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true);69 else70 sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN);71}72 73/*74 * convert scatterlist to h/w link table format75 * scatterlist must have been previously dma mapped76 */77static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int len,78 struct sec4_sg_entry *sec4_sg_ptr,79 u16 offset)80{81 sec4_sg_ptr = sg_to_sec4_sg(sg, len, sec4_sg_ptr, offset);82 sg_to_sec4_set_last(sec4_sg_ptr);83}84 85#endif /* _SG_SW_SEC4_H_ */86