/* n2rng.h: Niagara2 RNG defines. * * Copyright (C) 2008 David S. Miller <davem@davemloft.net> */ #ifndef _N2RNG_H #define _N2RNG_H #define RNG_CTL_WAIT 0x0000000001fffe00ULL /* Minimum wait time */ #define RNG_CTL_WAIT_SHIFT 9 #define RNG_CTL_BYPASS 0x0000000000000100ULL /* VCO voltage source */ #define RNG_CTL_VCO 0x00000000000000c0ULL /* VCO rate control */ #define RNG_CTL_VCO_SHIFT 6 #define RNG_CTL_ASEL 0x0000000000000030ULL /* Analog MUX select */ #define RNG_CTL_ASEL_SHIFT 4 #define RNG_CTL_LFSR 0x0000000000000008ULL /* Use LFSR or plain shift */ #define RNG_CTL_ES3 0x0000000000000004ULL /* Enable entropy source 3 */ #define RNG_CTL_ES2 0x0000000000000002ULL /* Enable entropy source 2 */ #define RNG_CTL_ES1 0x0000000000000001ULL /* Enable entropy source 1 */ #define HV_FAST_RNG_GET_DIAG_CTL 0x130 #define HV_FAST_RNG_CTL_READ 0x131 #define HV_FAST_RNG_CTL_WRITE 0x132 #define HV_FAST_RNG_DATA_READ_DIAG 0x133 #define HV_FAST_RNG_DATA_READ 0x134 #define HV_RNG_STATE_UNCONFIGURED 0 #define HV_RNG_STATE_CONFIGURED 1 #define HV_RNG_STATE_HEALTHCHECK 2 #define HV_RNG_STATE_ERROR 3 #define HV_RNG_NUM_CONTROL 4 #ifndef __ASSEMBLY__ extern unsigned long sun4v_rng_get_diag_ctl(void); extern unsigned long sun4v_rng_ctl_read_v1(unsigned long ctl_regs_ra, unsigned long *state, unsigned long *tick_delta); extern unsigned long sun4v_rng_ctl_read_v2(unsigned long ctl_regs_ra, unsigned long unit, unsigned long *state, unsigned long *tick_delta, unsigned long *watchdog, unsigned long *write_status); extern unsigned long sun4v_rng_ctl_write_v1(unsigned long ctl_regs_ra, unsigned long state, unsigned long write_timeout, unsigned long *tick_delta); extern unsigned long sun4v_rng_ctl_write_v2(unsigned long ctl_regs_ra, unsigned long state, unsigned long write_timeout, unsigned long unit); extern unsigned long sun4v_rng_data_read_diag_v1(unsigned long data_ra, unsigned long len, unsigned long *tick_delta); extern unsigned long sun4v_rng_data_read_diag_v2(unsigned long data_ra, unsigned long len, unsigned long unit, unsigned long *tick_delta); extern unsigned long sun4v_rng_data_read(unsigned long data_ra, unsigned long *tick_delta); struct n2rng_unit { u64 control[HV_RNG_NUM_CONTROL]; }; struct n2rng { struct of_device *op; unsigned long flags; #define N2RNG_FLAG_VF 0x00000001 /* Victoria Falls RNG, else N2 */ #define N2RNG_FLAG_CONTROL 0x00000002 /* Operating in control domain */ #define N2RNG_FLAG_READY 0x00000008 /* Ready for hw-rng layer */ #define N2RNG_FLAG_SHUTDOWN 0x00000010 /* Driver unregistering */ #define N2RNG_FLAG_BUFFER_VALID 0x00000020 /* u32 buffer holds valid data */ int num_units; struct n2rng_unit *units; struct hwrng hwrng; u32 buffer; /* Registered hypervisor group API major and minor version. */ unsigned long hvapi_major; unsigned long hvapi_minor; struct delayed_work work; unsigned long hv_state; /* HV_RNG_STATE_foo */ unsigned long health_check_sec; unsigned long accum_cycles; unsigned long wd_timeo; #define N2RNG_HEALTH_CHECK_SEC_DEFAULT 0 #define N2RNG_ACCUM_CYCLES_DEFAULT 2048 #define N2RNG_WD_TIMEO_DEFAULT 0 u64 scratch_control[HV_RNG_NUM_CONTROL]; #define SELFTEST_TICKS 38859 #define SELFTEST_VAL ((u64)0xB8820C7BD387E32C) #define SELFTEST_POLY ((u64)0x231DCEE91262B8A3) #define SELFTEST_MATCH_GOAL 6 #define SELFTEST_LOOPS_MAX 40000 #define SELFTEST_BUFFER_WORDS 8 u64 test_data; u64 test_control[HV_RNG_NUM_CONTROL]; u64 test_buffer[SELFTEST_BUFFER_WORDS]; }; #define N2RNG_BLOCK_LIMIT 60000 #define N2RNG_BUSY_LIMIT 100 #define N2RNG_HCHECK_LIMIT 100 #endif /* !(__ASSEMBLY__) */ #endif /* _N2RNG_H */