octeon_rnm.c revision 1.1.2.2
1 1.1.2.2 skrll /* $NetBSD: octeon_rnm.c,v 1.1.2.2 2015/06/06 14:40:01 skrll Exp $ */ 2 1.1.2.2 skrll 3 1.1.2.2 skrll /* 4 1.1.2.2 skrll * Copyright (c) 2007 Internet Initiative Japan, Inc. 5 1.1.2.2 skrll * All rights reserved. 6 1.1.2.2 skrll * 7 1.1.2.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 skrll * modification, are permitted provided that the following conditions 9 1.1.2.2 skrll * are met: 10 1.1.2.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 skrll * documentation and/or other materials provided with the distribution. 15 1.1.2.2 skrll * 16 1.1.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17 1.1.2.2 skrll * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.1.2.2 skrll * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.1.2.2 skrll * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 1.1.2.2 skrll * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.1.2.2 skrll * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.1.2.2 skrll * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.1.2.2 skrll * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.1.2.2 skrll * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.2.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.2.2 skrll * SUCH DAMAGE. 27 1.1.2.2 skrll */ 28 1.1.2.2 skrll 29 1.1.2.2 skrll #include <sys/cdefs.h> 30 1.1.2.2 skrll __KERNEL_RCSID(0, "$NetBSD: octeon_rnm.c,v 1.1.2.2 2015/06/06 14:40:01 skrll Exp $"); 31 1.1.2.2 skrll 32 1.1.2.2 skrll #include <sys/param.h> 33 1.1.2.2 skrll #include <sys/device.h> 34 1.1.2.2 skrll #include <sys/systm.h> 35 1.1.2.2 skrll #include <sys/sysctl.h> 36 1.1.2.2 skrll #include <sys/kernel.h> 37 1.1.2.2 skrll #include <sys/rndsource.h> 38 1.1.2.2 skrll 39 1.1.2.2 skrll #include <mips/locore.h> 40 1.1.2.2 skrll #include <mips/cavium/include/iobusvar.h> 41 1.1.2.2 skrll #include <mips/cavium/dev/octeon_rnmreg.h> 42 1.1.2.2 skrll #include <mips/cavium/dev/octeon_corereg.h> 43 1.1.2.2 skrll #include <mips/cavium/octeonvar.h> 44 1.1.2.2 skrll 45 1.1.2.2 skrll #include <sys/bus.h> 46 1.1.2.2 skrll #include <machine/param.h> 47 1.1.2.2 skrll 48 1.1.2.2 skrll #define RNG_DELAY_CLOCK 91 49 1.1.2.2 skrll #define RNG_DEF_BURST_COUNT 10 50 1.1.2.2 skrll 51 1.1.2.2 skrll int octeon_rnm_burst_count = RNG_DEF_BURST_COUNT; 52 1.1.2.2 skrll 53 1.1.2.2 skrll struct octeon_rnm_softc { 54 1.1.2.2 skrll device_t sc_dev; 55 1.1.2.2 skrll 56 1.1.2.2 skrll bus_space_tag_t sc_bust; 57 1.1.2.2 skrll bus_space_handle_t sc_regh; 58 1.1.2.2 skrll 59 1.1.2.2 skrll krndsource_t sc_rndsrc; /* /dev/random source */ 60 1.1.2.2 skrll struct callout sc_rngto; /* rng timeout */ 61 1.1.2.2 skrll int sc_rnghz; /* rng poll time */ 62 1.1.2.2 skrll }; 63 1.1.2.2 skrll 64 1.1.2.2 skrll static int octeon_rnm_match(device_t, struct cfdata *, void *); 65 1.1.2.2 skrll static void octeon_rnm_attach(device_t, device_t, void *); 66 1.1.2.2 skrll static void octeon_rnm_rng(void *); 67 1.1.2.2 skrll static inline uint64_t octeon_rnm_load(struct octeon_rnm_softc *); 68 1.1.2.2 skrll static inline int octeon_rnm_iobdma(struct octeon_rnm_softc *); 69 1.1.2.2 skrll 70 1.1.2.2 skrll CFATTACH_DECL_NEW(octeon_rnm, sizeof(struct octeon_rnm_softc), 71 1.1.2.2 skrll octeon_rnm_match, octeon_rnm_attach, NULL, NULL); 72 1.1.2.2 skrll 73 1.1.2.2 skrll static int 74 1.1.2.2 skrll octeon_rnm_match(device_t parent, struct cfdata *cf, void *aux) 75 1.1.2.2 skrll { 76 1.1.2.2 skrll struct iobus_attach_args *aa = aux; 77 1.1.2.2 skrll int result = 0; 78 1.1.2.2 skrll 79 1.1.2.2 skrll if (strcmp(cf->cf_name, aa->aa_name) != 0) 80 1.1.2.2 skrll goto out; 81 1.1.2.2 skrll if (cf->cf_unit != aa->aa_unitno) 82 1.1.2.2 skrll goto out; 83 1.1.2.2 skrll result = 1; 84 1.1.2.2 skrll 85 1.1.2.2 skrll out: 86 1.1.2.2 skrll return result; 87 1.1.2.2 skrll } 88 1.1.2.2 skrll 89 1.1.2.2 skrll static void 90 1.1.2.2 skrll octeon_rnm_attach(device_t parent, device_t self, void *aux) 91 1.1.2.2 skrll { 92 1.1.2.2 skrll struct octeon_rnm_softc *sc = device_private(self); 93 1.1.2.2 skrll struct iobus_attach_args *aa = aux; 94 1.1.2.2 skrll int status; 95 1.1.2.2 skrll 96 1.1.2.2 skrll aprint_normal("\n"); 97 1.1.2.2 skrll 98 1.1.2.2 skrll sc->sc_dev = self; 99 1.1.2.2 skrll sc->sc_bust = aa->aa_bust; 100 1.1.2.2 skrll status = bus_space_map(aa->aa_bust, aa->aa_unit->addr, RNM_SIZE, 101 1.1.2.2 skrll 0, &sc->sc_regh); 102 1.1.2.2 skrll if (status != 0) 103 1.1.2.2 skrll panic(": can't map i/o space"); 104 1.1.2.2 skrll 105 1.1.2.2 skrll bus_space_write_8(sc->sc_bust, sc->sc_regh, RNM_CTL_STATUS_OFFSET, 106 1.1.2.2 skrll RNM_CTL_STATUS_RNG_EN | RNM_CTL_STATUS_ENT_EN); 107 1.1.2.2 skrll 108 1.1.2.2 skrll if (hz >= 100) 109 1.1.2.2 skrll sc->sc_rnghz = hz / 100; 110 1.1.2.2 skrll else 111 1.1.2.2 skrll sc->sc_rnghz = 1; 112 1.1.2.2 skrll 113 1.1.2.2 skrll rnd_attach_source(&sc->sc_rndsrc, device_xname(sc->sc_dev), 114 1.1.2.2 skrll RND_TYPE_RNG, RND_FLAG_NO_ESTIMATE); 115 1.1.2.2 skrll 116 1.1.2.2 skrll callout_init(&sc->sc_rngto, 0); 117 1.1.2.2 skrll 118 1.1.2.2 skrll octeon_rnm_rng(sc); 119 1.1.2.2 skrll 120 1.1.2.2 skrll aprint_normal("%s: random number generator enabled: %dhz\n", 121 1.1.2.2 skrll device_xname(sc->sc_dev), sc->sc_rnghz); 122 1.1.2.2 skrll } 123 1.1.2.2 skrll 124 1.1.2.2 skrll static void 125 1.1.2.2 skrll octeon_rnm_rng(void *vsc) 126 1.1.2.2 skrll { 127 1.1.2.2 skrll struct octeon_rnm_softc *sc = vsc; 128 1.1.2.2 skrll uint64_t rn; 129 1.1.2.2 skrll int i; 130 1.1.2.2 skrll 131 1.1.2.2 skrll for (i = 0; i < octeon_rnm_burst_count; i++) { 132 1.1.2.2 skrll rn = octeon_rnm_load(sc); 133 1.1.2.2 skrll rnd_add_data(&sc->sc_rndsrc, 134 1.1.2.2 skrll &rn, sizeof(rn), sizeof(rn) * NBBY); 135 1.1.2.2 skrll /* 136 1.1.2.2 skrll * XXX 137 1.1.2.2 skrll * delay should be over RNG_DELAY_CLOCK cycles at least, 138 1.1.2.2 skrll * we need nanodelay() or clkdelay(). 139 1.1.2.2 skrll */ 140 1.1.2.2 skrll delay(1); 141 1.1.2.2 skrll } 142 1.1.2.2 skrll 143 1.1.2.2 skrll callout_reset(&sc->sc_rngto, sc->sc_rnghz, octeon_rnm_rng, sc); 144 1.1.2.2 skrll } 145 1.1.2.2 skrll 146 1.1.2.2 skrll static inline uint64_t 147 1.1.2.2 skrll octeon_rnm_load(struct octeon_rnm_softc *sc) 148 1.1.2.2 skrll { 149 1.1.2.2 skrll uint64_t addr = 150 1.1.2.2 skrll RNM_OPERATION_BASE_IO_BIT | 151 1.1.2.2 skrll __BITS64_SET(RNM_OPERATION_BASE_MAJOR_DID, 0x08) | 152 1.1.2.2 skrll __BITS64_SET(RNM_OPERATION_BASE_SUB_DID, 0x00); 153 1.1.2.2 skrll 154 1.1.2.2 skrll return octeon_xkphys_read_8(addr); 155 1.1.2.2 skrll } 156 1.1.2.2 skrll 157 1.1.2.2 skrll static inline int 158 1.1.2.2 skrll octeon_rnm_iobdma(struct octeon_rnm_softc *sc) 159 1.1.2.2 skrll { 160 1.1.2.2 skrll 161 1.1.2.2 skrll /* XXX */ 162 1.1.2.2 skrll return 0; 163 1.1.2.2 skrll } 164 1.1.2.2 skrll 165 1.1.2.2 skrll SYSCTL_SETUP(octeon_rnm_sysctl, "sysctl octeon_rnm subtree setup") 166 1.1.2.2 skrll { 167 1.1.2.2 skrll int rc, root_num; 168 1.1.2.2 skrll const struct sysctlnode *node; 169 1.1.2.2 skrll 170 1.1.2.2 skrll if ( (rc = sysctl_createv(clog, 0, NULL, NULL, 171 1.1.2.2 skrll CTLFLAG_PERMANENT, CTLTYPE_NODE, "hw", NULL, 172 1.1.2.2 skrll NULL, 0, NULL, 0, CTL_HW, CTL_EOL)) != 0) { 173 1.1.2.2 skrll goto err; 174 1.1.2.2 skrll } 175 1.1.2.2 skrll 176 1.1.2.2 skrll if ( (rc = sysctl_createv(clog, 0, NULL, &node, 177 1.1.2.2 skrll CTLFLAG_PERMANENT, CTLTYPE_NODE, "octeon_rnm", 178 1.1.2.2 skrll SYSCTL_DESCR("octeon_rnm controls"), 179 1.1.2.2 skrll NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0) { 180 1.1.2.2 skrll goto err; 181 1.1.2.2 skrll } 182 1.1.2.2 skrll 183 1.1.2.2 skrll root_num = node->sysctl_num; 184 1.1.2.2 skrll 185 1.1.2.2 skrll if ( (rc = sysctl_createv(clog, 0, NULL, NULL, 186 1.1.2.2 skrll CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 187 1.1.2.2 skrll CTLTYPE_INT, "burst_count", 188 1.1.2.2 skrll SYSCTL_DESCR("Burst read count per callout"), 189 1.1.2.2 skrll NULL, 0, &octeon_rnm_burst_count, 190 1.1.2.2 skrll 0, CTL_HW, root_num, CTL_CREATE, CTL_EOL)) != 0) { 191 1.1.2.2 skrll goto err; 192 1.1.2.2 skrll } 193 1.1.2.2 skrll 194 1.1.2.2 skrll return; 195 1.1.2.2 skrll err: 196 1.1.2.2 skrll printf("%s: sysctl_createv failed (rc = %d)\n", __func__, rc); 197 1.1.2.2 skrll } 198
Indexes created Fri Oct 03 02:09:57 GMT 2025