1 /* SPDX-License-Identifier: BSD-3-Clause */
2 /* Copyright(c) 2007-2022 Intel Corporation */
3 #include <linux/types.h>
4 #include "adf_accel_devices.h"
5 #include "adf_pfvf_msg.h"
6 #include "adf_pfvf_utils.h"
7
8 /* CRC Calculation */
9 #define ADF_CRC8_INIT_VALUE 0xFF
10
11 static const unsigned char pfvf_crc8_table[] =
12 { 0x00, 0x97, 0xB9, 0x2E, 0xE5, 0x72, 0x5C, 0xCB, 0x5D, 0xCA, 0xE4, 0x73,
13 0xB8, 0x2F, 0x01, 0x96, 0xBA, 0x2D, 0x03, 0x94, 0x5F, 0xC8, 0xE6, 0x71,
14 0xE7, 0x70, 0x5E, 0xC9, 0x02, 0x95, 0xBB, 0x2C, 0xE3, 0x74, 0x5A, 0xCD,
15 0x06, 0x91, 0xBF, 0x28, 0xBE, 0x29, 0x07, 0x90, 0x5B, 0xCC, 0xE2, 0x75,
16 0x59, 0xCE, 0xE0, 0x77, 0xBC, 0x2B, 0x05, 0x92, 0x04, 0x93, 0xBD, 0x2A,
17 0xE1, 0x76, 0x58, 0xCF, 0x51, 0xC6, 0xE8, 0x7F, 0xB4, 0x23, 0x0D, 0x9A,
18 0x0C, 0x9B, 0xB5, 0x22, 0xE9, 0x7E, 0x50, 0xC7, 0xEB, 0x7C, 0x52, 0xC5,
19 0x0E, 0x99, 0xB7, 0x20, 0xB6, 0x21, 0x0F, 0x98, 0x53, 0xC4, 0xEA, 0x7D,
20 0xB2, 0x25, 0x0B, 0x9C, 0x57, 0xC0, 0xEE, 0x79, 0xEF, 0x78, 0x56, 0xC1,
21 0x0A, 0x9D, 0xB3, 0x24, 0x08, 0x9F, 0xB1, 0x26, 0xED, 0x7A, 0x54, 0xC3,
22 0x55, 0xC2, 0xEC, 0x7B, 0xB0, 0x27, 0x09, 0x9E, 0xA2, 0x35, 0x1B, 0x8C,
23 0x47, 0xD0, 0xFE, 0x69, 0xFF, 0x68, 0x46, 0xD1, 0x1A, 0x8D, 0xA3, 0x34,
24 0x18, 0x8F, 0xA1, 0x36, 0xFD, 0x6A, 0x44, 0xD3, 0x45, 0xD2, 0xFC, 0x6B,
25 0xA0, 0x37, 0x19, 0x8E, 0x41, 0xD6, 0xF8, 0x6F, 0xA4, 0x33, 0x1D, 0x8A,
26 0x1C, 0x8B, 0xA5, 0x32, 0xF9, 0x6E, 0x40, 0xD7, 0xFB, 0x6C, 0x42, 0xD5,
27 0x1E, 0x89, 0xA7, 0x30, 0xA6, 0x31, 0x1F, 0x88, 0x43, 0xD4, 0xFA, 0x6D,
28 0xF3, 0x64, 0x4A, 0xDD, 0x16, 0x81, 0xAF, 0x38, 0xAE, 0x39, 0x17, 0x80,
29 0x4B, 0xDC, 0xF2, 0x65, 0x49, 0xDE, 0xF0, 0x67, 0xAC, 0x3B, 0x15, 0x82,
30 0x14, 0x83, 0xAD, 0x3A, 0xF1, 0x66, 0x48, 0xDF, 0x10, 0x87, 0xA9, 0x3E,
31 0xF5, 0x62, 0x4C, 0xDB, 0x4D, 0xDA, 0xF4, 0x63, 0xA8, 0x3F, 0x11, 0x86,
32 0xAA, 0x3D, 0x13, 0x84, 0x4F, 0xD8, 0xF6, 0x61, 0xF7, 0x60, 0x4E, 0xD9,
33 0x12, 0x85, 0xAB, 0x3C };
34
35 static u8
adf_pfvf_crc(u8 start_crc,u8 const * buf,u8 len)36 adf_pfvf_crc(u8 start_crc, u8 const *buf, u8 len)
37 {
38 u8 crc = start_crc;
39
40 while (len-- > 0)
41 crc = pfvf_crc8_table[(crc ^ *buf++) & 0xff];
42
43 return crc;
44 }
45
46 u8
adf_pfvf_calc_blkmsg_crc(u8 const * buf,u8 buf_len)47 adf_pfvf_calc_blkmsg_crc(u8 const *buf, u8 buf_len)
48 {
49 return adf_pfvf_crc(ADF_CRC8_INIT_VALUE, buf, buf_len);
50 }
51
52 static bool
set_value_on_csr_msg(struct adf_accel_dev * accel_dev,u32 * csr_msg,u32 value,const struct pfvf_field_format * fmt)53 set_value_on_csr_msg(struct adf_accel_dev *accel_dev,
54 u32 *csr_msg,
55 u32 value,
56 const struct pfvf_field_format *fmt)
57 {
58 if (unlikely((value & fmt->mask) != value)) {
59 device_printf(
60 GET_DEV(accel_dev),
61 "PFVF message value 0x%X out of range, %u max allowed\n",
62 value,
63 fmt->mask);
64 return false;
65 }
66
67 *csr_msg |= value << fmt->offset;
68
69 return true;
70 }
71
72 u32
adf_pfvf_csr_msg_of(struct adf_accel_dev * accel_dev,struct pfvf_message msg,const struct pfvf_csr_format * fmt)73 adf_pfvf_csr_msg_of(struct adf_accel_dev *accel_dev,
74 struct pfvf_message msg,
75 const struct pfvf_csr_format *fmt)
76 {
77 u32 csr_msg = 0;
78
79 if (!set_value_on_csr_msg(accel_dev, &csr_msg, msg.type, &fmt->type) ||
80 !set_value_on_csr_msg(accel_dev, &csr_msg, msg.data, &fmt->data))
81 return 0;
82
83 return csr_msg | ADF_PFVF_MSGORIGIN_SYSTEM;
84 }
85
86 struct pfvf_message
adf_pfvf_message_of(struct adf_accel_dev * accel_dev,u32 csr_msg,const struct pfvf_csr_format * fmt)87 adf_pfvf_message_of(struct adf_accel_dev *accel_dev,
88 u32 csr_msg,
89 const struct pfvf_csr_format *fmt)
90 {
91 struct pfvf_message msg = { 0 };
92
93 msg.type = (csr_msg >> fmt->type.offset) & fmt->type.mask;
94 msg.data = (csr_msg >> fmt->data.offset) & fmt->data.mask;
95
96 if (unlikely(!msg.type))
97 device_printf(GET_DEV(accel_dev),
98 "Invalid PFVF msg with no type received\n");
99
100 return msg;
101 }
102