1 /* 2 * CAAM/SEC 4.x functions for using scatterlists in caam driver 3 * 4 * Copyright 2008-2011 Freescale Semiconductor, Inc. 5 * 6 */ 7 8 #ifndef _SG_SW_SEC4_H_ 9 #define _SG_SW_SEC4_H_ 10 11 #include "ctrl.h" 12 #include "regs.h" 13 #include "sg_sw_qm2.h" 14 #include "../../../drivers/staging/fsl-mc/include/dpaa2-fd.h" 15 16 struct sec4_sg_entry { 17 u64 ptr; 18 u32 len; 19 u32 bpid_offset; 20 }; 21 22 /* 23 * convert single dma address to h/w link table format 24 */ 25 static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr, 26 dma_addr_t dma, u32 len, u16 offset) 27 { 28 if (caam_dpaa2) { 29 dma_to_qm_sg_one((struct dpaa2_sg_entry *)sec4_sg_ptr, dma, len, 30 offset); 31 } else { 32 sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma); 33 sec4_sg_ptr->len = cpu_to_caam32(len); 34 sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset & 35 SEC4_SG_OFFSET_MASK); 36 } 37 #ifdef DEBUG 38 print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ", 39 DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr, 40 sizeof(struct sec4_sg_entry), 1); 41 #endif 42 } 43 44 /* 45 * convert scatterlist to h/w link table format 46 * but does not have final bit; instead, returns last entry 47 */ 48 static inline struct sec4_sg_entry * 49 sg_to_sec4_sg(struct scatterlist *sg, int sg_count, 50 struct sec4_sg_entry *sec4_sg_ptr, u16 offset) 51 { 52 while (sg_count) { 53 dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), 54 sg_dma_len(sg), offset); 55 sec4_sg_ptr++; 56 sg = sg_next(sg); 57 sg_count--; 58 } 59 return sec4_sg_ptr - 1; 60 } 61 62 static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr) 63 { 64 if (caam_dpaa2) 65 dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true); 66 else 67 sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN); 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_sec4_sg_last(struct scatterlist *sg, int sg_count, 75 struct sec4_sg_entry *sec4_sg_ptr, 76 u16 offset) 77 { 78 sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset); 79 sg_to_sec4_set_last(sec4_sg_ptr); 80 } 81 82 #endif /* _SG_SW_SEC4_H_ */ 83