1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright 2016 Broadcom
4  */
5 
6 #ifndef _UTIL_H
7 #define _UTIL_H
8 
9 #include <linux/kernel.h>
10 #include <linux/delay.h>
11 
12 #include "spu.h"
13 
14 extern int flow_debug_logging;
15 extern int packet_debug_logging;
16 extern int debug_logging_sleep;
17 
18 #ifdef DEBUG
19 #define flow_log(...)	                \
20 	do {	                              \
21 		if (flow_debug_logging) {	        \
22 			printk(__VA_ARGS__);	          \
23 			if (debug_logging_sleep)	      \
24 				msleep(debug_logging_sleep);	\
25 		}	                                \
26 	} while (0)
27 #define flow_dump(msg, var, var_len)	   \
28 	do {	                                 \
29 		if (flow_debug_logging) {	           \
30 			print_hex_dump(KERN_ALERT, msg, DUMP_PREFIX_NONE,  \
31 					16, 1, var, var_len, false); \
32 				if (debug_logging_sleep)	       \
33 					msleep(debug_logging_sleep);   \
34 		}                                    \
35 	} while (0)
36 
37 #define packet_log(...)               \
38 	do {                                \
39 		if (packet_debug_logging) {       \
40 			printk(__VA_ARGS__);            \
41 			if (debug_logging_sleep)        \
42 				msleep(debug_logging_sleep);  \
43 		}                                 \
44 	} while (0)
45 #define packet_dump(msg, var, var_len)   \
46 	do {                                   \
47 		if (packet_debug_logging) {          \
48 			print_hex_dump(KERN_ALERT, msg, DUMP_PREFIX_NONE,  \
49 					16, 1, var, var_len, false); \
50 			if (debug_logging_sleep)           \
51 				msleep(debug_logging_sleep);     \
52 		}                                    \
53 	} while (0)
54 
55 void __dump_sg(struct scatterlist *sg, unsigned int skip, unsigned int len);
56 
57 #define dump_sg(sg, skip, len)     __dump_sg(sg, skip, len)
58 
59 #else /* !DEBUG_ON */
60 
flow_log(const char * format,...)61 static inline void flow_log(const char *format, ...)
62 {
63 }
64 
flow_dump(const char * msg,const void * var,size_t var_len)65 static inline void flow_dump(const char *msg, const void *var, size_t var_len)
66 {
67 }
68 
packet_log(const char * format,...)69 static inline void packet_log(const char *format, ...)
70 {
71 }
72 
packet_dump(const char * msg,const void * var,size_t var_len)73 static inline void packet_dump(const char *msg, const void *var, size_t var_len)
74 {
75 }
76 
dump_sg(struct scatterlist * sg,unsigned int skip,unsigned int len)77 static inline void dump_sg(struct scatterlist *sg, unsigned int skip,
78 			   unsigned int len)
79 {
80 }
81 
82 #endif /* DEBUG_ON */
83 
84 int spu_sg_at_offset(struct scatterlist *sg, unsigned int skip,
85 		     struct scatterlist **sge, unsigned int *sge_offset);
86 
87 /* Copy sg data, from skip, length len, to dest */
88 void sg_copy_part_to_buf(struct scatterlist *src, u8 *dest,
89 			 unsigned int len, unsigned int skip);
90 /* Copy src into scatterlist from offset, length len */
91 void sg_copy_part_from_buf(struct scatterlist *dest, u8 *src,
92 			   unsigned int len, unsigned int skip);
93 
94 int spu_sg_count(struct scatterlist *sg_list, unsigned int skip, int nbytes);
95 u32 spu_msg_sg_add(struct scatterlist **to_sg,
96 		   struct scatterlist **from_sg, u32 *skip,
97 		   u8 from_nents, u32 tot_len);
98 
99 void add_to_ctr(u8 *ctr_pos, unsigned int increment);
100 
101 /* produce a message digest from data of length n bytes */
102 int do_shash(unsigned char *name, unsigned char *result,
103 	     const u8 *data1, unsigned int data1_len,
104 	     const u8 *data2, unsigned int data2_len,
105 	     const u8 *key, unsigned int key_len);
106 
107 char *spu_alg_name(enum spu_cipher_alg alg, enum spu_cipher_mode mode);
108 
109 void spu_setup_debugfs(void);
110 void spu_free_debugfs(void);
111 void format_value_ccm(unsigned int val, u8 *buf, u8 len);
112 
113 #endif
114