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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - drivers/char/hw_random/n2rng.h
1 /* n2rng.h: Niagara2 RNG defines.
3 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
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 */
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
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
32 #define HV_RNG_NUM_CONTROL 4
35 extern unsigned long sun4v_rng_get_diag_ctl(void);
36 extern unsigned long sun4v_rng_ctl_read_v1(unsigned long ctl_regs_ra
,
38 unsigned long *tick_delta
);
39 extern unsigned long sun4v_rng_ctl_read_v2(unsigned long ctl_regs_ra
,
42 unsigned long *tick_delta
,
43 unsigned long *watchdog
,
44 unsigned long *write_status
);
45 extern unsigned long sun4v_rng_ctl_write_v1(unsigned long ctl_regs_ra
,
47 unsigned long write_timeout
,
48 unsigned long *tick_delta
);
49 extern unsigned long sun4v_rng_ctl_write_v2(unsigned long ctl_regs_ra
,
51 unsigned long write_timeout
,
53 extern unsigned long sun4v_rng_data_read_diag_v1(unsigned long data_ra
,
55 unsigned long *tick_delta
);
56 extern unsigned long sun4v_rng_data_read_diag_v2(unsigned long data_ra
,
59 unsigned long *tick_delta
);
60 extern unsigned long sun4v_rng_data_read(unsigned long data_ra
,
61 unsigned long *tick_delta
);
64 u64 control
[HV_RNG_NUM_CONTROL
];
68 struct platform_device
*op
;
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 */
78 struct n2rng_unit
*units
;
83 /* Registered hypervisor group API major and minor version. */
84 unsigned long hvapi_major
;
85 unsigned long hvapi_minor
;
87 struct delayed_work work
;
89 unsigned long hv_state
; /* HV_RNG_STATE_foo */
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
98 u64 scratch_control
[HV_RNG_NUM_CONTROL
];
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
108 u64 test_control
[HV_RNG_NUM_CONTROL
];
109 u64 test_buffer
[SELFTEST_BUFFER_WORDS
];
112 #define N2RNG_BLOCK_LIMIT 60000
113 #define N2RNG_BUSY_LIMIT 100
114 #define N2RNG_HCHECK_LIMIT 100
116 #endif /* !(__ASSEMBLY__) */
118 #endif /* _N2RNG_H */