Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / char / hw_random / n2rng.h

diff --git a/kernel/drivers/char/hw_random/n2rng.h b/kernel/drivers/char/hw_random/n2rng.h
new file mode 100644 (file)
index 0000000..f244ac8
--- /dev/null
+++ b/kernel/drivers/char/hw_random/n2rng.h
@@ -0,0 +1,118 @@
+/* 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 platform_device  *op;
+
+       unsigned long           flags;
+#define N2RNG_FLAG_MULTI       0x00000001 /* Multi-unit capable RNG */
+#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 */