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1/* SPDX-License-Identifier: GPL-2.0 */
2/* n2rng.h: Niagara2 RNG defines.
3 *
4 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
5 */
6
7#ifndef _N2RNG_H
8#define _N2RNG_H
9
10/* ver1 devices - n2-rng, vf-rng, kt-rng */
11#define RNG_v1_CTL_WAIT 0x0000000001fffe00ULL /* Minimum wait time */
12#define RNG_v1_CTL_WAIT_SHIFT 9
13#define RNG_v1_CTL_BYPASS 0x0000000000000100ULL /* VCO voltage source */
14#define RNG_v1_CTL_VCO 0x00000000000000c0ULL /* VCO rate control */
15#define RNG_v1_CTL_VCO_SHIFT 6
16#define RNG_v1_CTL_ASEL 0x0000000000000030ULL /* Analog MUX select */
17#define RNG_v1_CTL_ASEL_SHIFT 4
18#define RNG_v1_CTL_ASEL_NOOUT 2
19
20/* these are the same in v2 as in v1 */
21#define RNG_CTL_LFSR 0x0000000000000008ULL /* Use LFSR or plain shift */
22#define RNG_CTL_ES3 0x0000000000000004ULL /* Enable entropy source 3 */
23#define RNG_CTL_ES2 0x0000000000000002ULL /* Enable entropy source 2 */
24#define RNG_CTL_ES1 0x0000000000000001ULL /* Enable entropy source 1 */
25
26/* ver2 devices - m4-rng, m7-rng */
27#define RNG_v2_CTL_WAIT 0x0000000007fff800ULL /* Minimum wait time */
28#define RNG_v2_CTL_WAIT_SHIFT 12
29#define RNG_v2_CTL_BYPASS 0x0000000000000400ULL /* VCO voltage source */
30#define RNG_v2_CTL_VCO 0x0000000000000300ULL /* VCO rate control */
31#define RNG_v2_CTL_VCO_SHIFT 9
32#define RNG_v2_CTL_PERF 0x0000000000000180ULL /* Perf */
33#define RNG_v2_CTL_ASEL 0x0000000000000070ULL /* Analog MUX select */
34#define RNG_v2_CTL_ASEL_SHIFT 4
35#define RNG_v2_CTL_ASEL_NOOUT 7
36
37
38#define HV_FAST_RNG_GET_DIAG_CTL 0x130
39#define HV_FAST_RNG_CTL_READ 0x131
40#define HV_FAST_RNG_CTL_WRITE 0x132
41#define HV_FAST_RNG_DATA_READ_DIAG 0x133
42#define HV_FAST_RNG_DATA_READ 0x134
43
44#define HV_RNG_STATE_UNCONFIGURED 0
45#define HV_RNG_STATE_CONFIGURED 1
46#define HV_RNG_STATE_HEALTHCHECK 2
47#define HV_RNG_STATE_ERROR 3
48
49#define HV_RNG_NUM_CONTROL 4
50
51#ifndef __ASSEMBLY__
52extern unsigned long sun4v_rng_get_diag_ctl(void);
53extern unsigned long sun4v_rng_ctl_read_v1(unsigned long ctl_regs_ra,
54 unsigned long *state,
55 unsigned long *tick_delta);
56extern unsigned long sun4v_rng_ctl_read_v2(unsigned long ctl_regs_ra,
57 unsigned long unit,
58 unsigned long *state,
59 unsigned long *tick_delta,
60 unsigned long *watchdog,
61 unsigned long *write_status);
62extern unsigned long sun4v_rng_ctl_write_v1(unsigned long ctl_regs_ra,
63 unsigned long state,
64 unsigned long write_timeout,
65 unsigned long *tick_delta);
66extern unsigned long sun4v_rng_ctl_write_v2(unsigned long ctl_regs_ra,
67 unsigned long state,
68 unsigned long write_timeout,
69 unsigned long unit);
70extern unsigned long sun4v_rng_data_read_diag_v1(unsigned long data_ra,
71 unsigned long len,
72 unsigned long *tick_delta);
73extern unsigned long sun4v_rng_data_read_diag_v2(unsigned long data_ra,
74 unsigned long len,
75 unsigned long unit,
76 unsigned long *tick_delta);
77extern unsigned long sun4v_rng_data_read(unsigned long data_ra,
78 unsigned long *tick_delta);
79
80enum n2rng_compat_id {
81 N2_n2_rng,
82 N2_vf_rng,
83 N2_kt_rng,
84 N2_m4_rng,
85 N2_m7_rng,
86};
87
88struct n2rng_template {
89 enum n2rng_compat_id id;
90 int multi_capable;
91 int chip_version;
92};
93
94struct n2rng_unit {
95 u64 control[HV_RNG_NUM_CONTROL];
96};
97
98struct n2rng {
99 struct platform_device *op;
100
101 unsigned long flags;
102#define N2RNG_FLAG_MULTI 0x00000001 /* Multi-unit capable RNG */
103#define N2RNG_FLAG_CONTROL 0x00000002 /* Operating in control domain */
104#define N2RNG_FLAG_READY 0x00000008 /* Ready for hw-rng layer */
105#define N2RNG_FLAG_SHUTDOWN 0x00000010 /* Driver unregistering */
106#define N2RNG_FLAG_BUFFER_VALID 0x00000020 /* u32 buffer holds valid data */
107
108 struct n2rng_template *data;
109 int num_units;
110 struct n2rng_unit *units;
111
112 struct hwrng hwrng;
113 u32 buffer;
114
115 /* Registered hypervisor group API major and minor version. */
116 unsigned long hvapi_major;
117 unsigned long hvapi_minor;
118
119 struct delayed_work work;
120
121 unsigned long hv_state; /* HV_RNG_STATE_foo */
122
123 unsigned long health_check_sec;
124 unsigned long accum_cycles;
125 unsigned long wd_timeo;
126#define N2RNG_HEALTH_CHECK_SEC_DEFAULT 0
127#define N2RNG_ACCUM_CYCLES_DEFAULT 2048
128#define N2RNG_WD_TIMEO_DEFAULT 0
129
130 u64 scratch_control[HV_RNG_NUM_CONTROL];
131
132#define RNG_v1_SELFTEST_TICKS 38859
133#define RNG_v1_SELFTEST_VAL ((u64)0xB8820C7BD387E32C)
134#define RNG_v2_SELFTEST_TICKS 64
135#define RNG_v2_SELFTEST_VAL ((u64)0xffffffffffffffff)
136#define SELFTEST_POLY ((u64)0x231DCEE91262B8A3)
137#define SELFTEST_MATCH_GOAL 6
138#define SELFTEST_LOOPS_MAX 40000
139#define SELFTEST_BUFFER_WORDS 8
140
141 u64 test_data;
142 u64 test_control[HV_RNG_NUM_CONTROL];
143 u64 test_buffer[SELFTEST_BUFFER_WORDS];
144};
145
146#define N2RNG_BLOCK_LIMIT 60000
147#define N2RNG_BUSY_LIMIT 100
148#define N2RNG_HCHECK_LIMIT 100
149
150#endif /* !(__ASSEMBLY__) */
151
152#endif /* _N2RNG_H */
1/* n2rng.h: Niagara2 RNG defines.
2 *
3 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
4 */
5
6#ifndef _N2RNG_H
7#define _N2RNG_H
8
9#define RNG_CTL_WAIT 0x0000000001fffe00ULL /* Minimum wait time */
10#define RNG_CTL_WAIT_SHIFT 9
11#define RNG_CTL_BYPASS 0x0000000000000100ULL /* VCO voltage source */
12#define RNG_CTL_VCO 0x00000000000000c0ULL /* VCO rate control */
13#define RNG_CTL_VCO_SHIFT 6
14#define RNG_CTL_ASEL 0x0000000000000030ULL /* Analog MUX select */
15#define RNG_CTL_ASEL_SHIFT 4
16#define RNG_CTL_LFSR 0x0000000000000008ULL /* Use LFSR or plain shift */
17#define RNG_CTL_ES3 0x0000000000000004ULL /* Enable entropy source 3 */
18#define RNG_CTL_ES2 0x0000000000000002ULL /* Enable entropy source 2 */
19#define RNG_CTL_ES1 0x0000000000000001ULL /* Enable entropy source 1 */
20
21#define HV_FAST_RNG_GET_DIAG_CTL 0x130
22#define HV_FAST_RNG_CTL_READ 0x131
23#define HV_FAST_RNG_CTL_WRITE 0x132
24#define HV_FAST_RNG_DATA_READ_DIAG 0x133
25#define HV_FAST_RNG_DATA_READ 0x134
26
27#define HV_RNG_STATE_UNCONFIGURED 0
28#define HV_RNG_STATE_CONFIGURED 1
29#define HV_RNG_STATE_HEALTHCHECK 2
30#define HV_RNG_STATE_ERROR 3
31
32#define HV_RNG_NUM_CONTROL 4
33
34#ifndef __ASSEMBLY__
35extern unsigned long sun4v_rng_get_diag_ctl(void);
36extern unsigned long sun4v_rng_ctl_read_v1(unsigned long ctl_regs_ra,
37 unsigned long *state,
38 unsigned long *tick_delta);
39extern unsigned long sun4v_rng_ctl_read_v2(unsigned long ctl_regs_ra,
40 unsigned long unit,
41 unsigned long *state,
42 unsigned long *tick_delta,
43 unsigned long *watchdog,
44 unsigned long *write_status);
45extern unsigned long sun4v_rng_ctl_write_v1(unsigned long ctl_regs_ra,
46 unsigned long state,
47 unsigned long write_timeout,
48 unsigned long *tick_delta);
49extern unsigned long sun4v_rng_ctl_write_v2(unsigned long ctl_regs_ra,
50 unsigned long state,
51 unsigned long write_timeout,
52 unsigned long unit);
53extern unsigned long sun4v_rng_data_read_diag_v1(unsigned long data_ra,
54 unsigned long len,
55 unsigned long *tick_delta);
56extern unsigned long sun4v_rng_data_read_diag_v2(unsigned long data_ra,
57 unsigned long len,
58 unsigned long unit,
59 unsigned long *tick_delta);
60extern unsigned long sun4v_rng_data_read(unsigned long data_ra,
61 unsigned long *tick_delta);
62
63struct n2rng_unit {
64 u64 control[HV_RNG_NUM_CONTROL];
65};
66
67struct n2rng {
68 struct platform_device *op;
69
70 unsigned long flags;
71#define N2RNG_FLAG_MULTI 0x00000001 /* Multi-unit capable RNG */
72#define N2RNG_FLAG_CONTROL 0x00000002 /* Operating in control domain */
73#define N2RNG_FLAG_READY 0x00000008 /* Ready for hw-rng layer */
74#define N2RNG_FLAG_SHUTDOWN 0x00000010 /* Driver unregistering */
75#define N2RNG_FLAG_BUFFER_VALID 0x00000020 /* u32 buffer holds valid data */
76
77 int num_units;
78 struct n2rng_unit *units;
79
80 struct hwrng hwrng;
81 u32 buffer;
82
83 /* Registered hypervisor group API major and minor version. */
84 unsigned long hvapi_major;
85 unsigned long hvapi_minor;
86
87 struct delayed_work work;
88
89 unsigned long hv_state; /* HV_RNG_STATE_foo */
90
91 unsigned long health_check_sec;
92 unsigned long accum_cycles;
93 unsigned long wd_timeo;
94#define N2RNG_HEALTH_CHECK_SEC_DEFAULT 0
95#define N2RNG_ACCUM_CYCLES_DEFAULT 2048
96#define N2RNG_WD_TIMEO_DEFAULT 0
97
98 u64 scratch_control[HV_RNG_NUM_CONTROL];
99
100#define SELFTEST_TICKS 38859
101#define SELFTEST_VAL ((u64)0xB8820C7BD387E32C)
102#define SELFTEST_POLY ((u64)0x231DCEE91262B8A3)
103#define SELFTEST_MATCH_GOAL 6
104#define SELFTEST_LOOPS_MAX 40000
105#define SELFTEST_BUFFER_WORDS 8
106
107 u64 test_data;
108 u64 test_control[HV_RNG_NUM_CONTROL];
109 u64 test_buffer[SELFTEST_BUFFER_WORDS];
110};
111
112#define N2RNG_BLOCK_LIMIT 60000
113#define N2RNG_BUSY_LIMIT 100
114#define N2RNG_HCHECK_LIMIT 100
115
116#endif /* !(__ASSEMBLY__) */
117
118#endif /* _N2RNG_H */