xref: /wlan-driver/qca-wifi-host-cmn/hal/wifi3.0/hal_flow.h (revision 5113495b16420b49004c444715d2daae2066e7dc)
1 /*
2  * Copyright (c) 2019 The Linux Foundation. All rights reserved.
3  *
4  * Permission to use, copy, modify, and/or distribute this software for
5  * any purpose with or without fee is hereby granted, provided that the
6  * above copyright notice and this permission notice appear in all
7  * copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
10  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
11  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
12  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
13  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
14  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
15  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
16  * PERFORMANCE OF THIS SOFTWARE.
17  */
18 #ifndef __HAL_FLOW_H
19 #define __HAL_FLOW_H
20 
21 #define HAL_SET_FLD_SM(block, field, value) \
22 	(((value) << (block ## _ ## field ## _LSB)) & \
23 	 (block ## _ ## field ## _MASK))
24 
25 #define HAL_SET_FLD_MS(block, field, value) \
26 	(((value) & (block ## _ ## field ## _MASK)) >> \
27 	 (block ## _ ## field ## _LSB))
28 
29 #define HAL_CLR_FLD(desc, block, field) \
30 do { \
31 	uint32_t val; \
32 	typeof(desc) desc_ = desc; \
33 	val = *((uint32_t *)((uint8_t *)(desc_) + \
34 		HAL_OFFSET(block, field))); \
35 	val &= ~(block ## _ ## field ## _MASK); \
36 	HAL_SET_FLD(desc_, block, field) = val; \
37 } while (0)
38 
39 #define HAL_GET_FLD(desc, block, field) \
40 	    ((*((uint32_t *)((uint8_t *)(desc) + HAL_OFFSET(block, field))) & \
41 	    (block ## _ ## field ## _MASK)) >> (block ## _ ## field ## _LSB))
42 
43 /**
44  * struct hal_flow_tuple_info - Hal Flow 5-tuple
45  * @dest_ip_127_96: Destination IP address bits 96-127
46  * @dest_ip_95_64: Destination IP address bits 64-95
47  * @dest_ip_63_32: Destination IP address bits 32-63
48  * @dest_ip_31_0: Destination IP address bits 0-31
49  * @src_ip_127_96: Source IP address bits 96-127
50  * @src_ip_95_64: Source IP address bits 64-95
51  * @src_ip_63_32: Source IP address bits 32-63
52  * @src_ip_31_0: Source IP address bits 0-31
53  * @dest_port: Destination Port
54  * @src_port: Source Port
55  * @l4_protocol: Layer-4 protocol type (TCP/UDP)
56  */
57 struct hal_flow_tuple_info {
58 	uint32_t dest_ip_127_96;
59 	uint32_t dest_ip_95_64;
60 	uint32_t dest_ip_63_32;
61 	uint32_t dest_ip_31_0;
62 	uint32_t src_ip_127_96;
63 	uint32_t src_ip_95_64;
64 	uint32_t src_ip_63_32;
65 	uint32_t src_ip_31_0;
66 	uint16_t dest_port;
67 	uint16_t src_port;
68 	uint16_t l4_protocol;
69 };
70 
71 /**
72  * key_bitwise_shift_left() - Bitwise left shift (in place) an array of bytes
73  * @key: Pointer to array to key bytes
74  * @len: size of array (number of key bytes)
75  * @shift: number of shift operations to be performed
76  *
77  * Return:
78  */
79 static inline void
key_bitwise_shift_left(uint8_t * key,int len,int shift)80 key_bitwise_shift_left(uint8_t *key, int len, int shift)
81 {
82 	int i;
83 	int next;
84 
85 	while (shift--) {
86 		for (i = len - 1; i >= 0 ; i--) {
87 			if (i > 0)
88 				next = (key[i - 1] & 0x80 ? 1 : 0);
89 			else
90 				next = 0;
91 			key[i] = (key[i] << 1) | next;
92 		}
93 	}
94 }
95 
96 /**
97  * key_reverse() - Reverse the key buffer from MSB to LSB
98  * @dest: pointer to the destination key
99  * @src: pointer to the source key which should be shifted
100  * @len: size of key in bytes
101  *
102  * Return:
103  */
104 static inline void
key_reverse(uint8_t * dest,uint8_t * src,int len)105 key_reverse(uint8_t *dest, uint8_t *src, int len)
106 {
107 	int i, j;
108 
109 	for (i = 0, j = len  - 1; i < len; i++, j--)
110 		dest[i] = src[j];
111 }
112 #endif /* HAL_FLOW_H */
113