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gerrit-public.fairphone.software / kernel / msm / b8a327be3fbf05b5d3a935b4c03a3dcdb6db833e / . / drivers / char / hw_random / n2rng.h
blob: a2b81e7bfc180f983b23a85c8350ec079398646e [file] [log] [blame]
David S. Millerce087152008-06-03 15:56:11 -0700[diff] [blame]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 of_device *op;
69
70 unsigned long flags;
71#define N2RNG_FLAG_VF 0x00000001 /* Victoria Falls RNG, else N2 */
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 */