octeon_rnm.c revision 1.1.18.2
1 1.1.18.2 jdolecek /* $NetBSD: octeon_rnm.c,v 1.1.18.2 2017/12/03 11:36:27 jdolecek Exp $ */ 2 1.1.18.2 jdolecek 3 1.1.18.2 jdolecek /* 4 1.1.18.2 jdolecek * Copyright (c) 2007 Internet Initiative Japan, Inc. 5 1.1.18.2 jdolecek * All rights reserved. 6 1.1.18.2 jdolecek * 7 1.1.18.2 jdolecek * Redistribution and use in source and binary forms, with or without 8 1.1.18.2 jdolecek * modification, are permitted provided that the following conditions 9 1.1.18.2 jdolecek * are met: 10 1.1.18.2 jdolecek * 1. Redistributions of source code must retain the above copyright 11 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer. 12 1.1.18.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer in the 14 1.1.18.2 jdolecek * documentation and/or other materials provided with the distribution. 15 1.1.18.2 jdolecek * 16 1.1.18.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17 1.1.18.2 jdolecek * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.1.18.2 jdolecek * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.1.18.2 jdolecek * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 1.1.18.2 jdolecek * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.1.18.2 jdolecek * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.1.18.2 jdolecek * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.1.18.2 jdolecek * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.1.18.2 jdolecek * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.18.2 jdolecek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.18.2 jdolecek * SUCH DAMAGE. 27 1.1.18.2 jdolecek */ 28 1.1.18.2 jdolecek 29 1.1.18.2 jdolecek #include <sys/cdefs.h> 30 1.1.18.2 jdolecek __KERNEL_RCSID(0, "$NetBSD: octeon_rnm.c,v 1.1.18.2 2017/12/03 11:36:27 jdolecek Exp $"); 31 1.1.18.2 jdolecek 32 1.1.18.2 jdolecek #include <sys/param.h> 33 1.1.18.2 jdolecek #include <sys/device.h> 34 1.1.18.2 jdolecek #include <sys/systm.h> 35 1.1.18.2 jdolecek #include <sys/sysctl.h> 36 1.1.18.2 jdolecek #include <sys/kernel.h> 37 1.1.18.2 jdolecek #include <sys/rndsource.h> 38 1.1.18.2 jdolecek 39 1.1.18.2 jdolecek #include <mips/locore.h> 40 1.1.18.2 jdolecek #include <mips/cavium/include/iobusvar.h> 41 1.1.18.2 jdolecek #include <mips/cavium/dev/octeon_rnmreg.h> 42 1.1.18.2 jdolecek #include <mips/cavium/dev/octeon_corereg.h> 43 1.1.18.2 jdolecek #include <mips/cavium/octeonvar.h> 44 1.1.18.2 jdolecek 45 1.1.18.2 jdolecek #include <sys/bus.h> 46 1.1.18.2 jdolecek #include <machine/param.h> 47 1.1.18.2 jdolecek 48 1.1.18.2 jdolecek #define RNG_DELAY_CLOCK 91 49 1.1.18.2 jdolecek #define RNG_DEF_BURST_COUNT 10 50 1.1.18.2 jdolecek 51 1.1.18.2 jdolecek int octeon_rnm_burst_count = RNG_DEF_BURST_COUNT; 52 1.1.18.2 jdolecek 53 1.1.18.2 jdolecek struct octeon_rnm_softc { 54 1.1.18.2 jdolecek device_t sc_dev; 55 1.1.18.2 jdolecek 56 1.1.18.2 jdolecek bus_space_tag_t sc_bust; 57 1.1.18.2 jdolecek bus_space_handle_t sc_regh; 58 1.1.18.2 jdolecek 59 1.1.18.2 jdolecek krndsource_t sc_rndsrc; /* /dev/random source */ 60 1.1.18.2 jdolecek struct callout sc_rngto; /* rng timeout */ 61 1.1.18.2 jdolecek int sc_rnghz; /* rng poll time */ 62 1.1.18.2 jdolecek }; 63 1.1.18.2 jdolecek 64 1.1.18.2 jdolecek static int octeon_rnm_match(device_t, struct cfdata *, void *); 65 1.1.18.2 jdolecek static void octeon_rnm_attach(device_t, device_t, void *); 66 1.1.18.2 jdolecek static void octeon_rnm_rng(void *); 67 1.1.18.2 jdolecek static inline uint64_t octeon_rnm_load(struct octeon_rnm_softc *); 68 1.1.18.2 jdolecek static inline int octeon_rnm_iobdma(struct octeon_rnm_softc *); 69 1.1.18.2 jdolecek 70 1.1.18.2 jdolecek CFATTACH_DECL_NEW(octeon_rnm, sizeof(struct octeon_rnm_softc), 71 1.1.18.2 jdolecek octeon_rnm_match, octeon_rnm_attach, NULL, NULL); 72 1.1.18.2 jdolecek 73 1.1.18.2 jdolecek static int 74 1.1.18.2 jdolecek octeon_rnm_match(device_t parent, struct cfdata *cf, void *aux) 75 1.1.18.2 jdolecek { 76 1.1.18.2 jdolecek struct iobus_attach_args *aa = aux; 77 1.1.18.2 jdolecek int result = 0; 78 1.1.18.2 jdolecek 79 1.1.18.2 jdolecek if (strcmp(cf->cf_name, aa->aa_name) != 0) 80 1.1.18.2 jdolecek goto out; 81 1.1.18.2 jdolecek if (cf->cf_unit != aa->aa_unitno) 82 1.1.18.2 jdolecek goto out; 83 1.1.18.2 jdolecek result = 1; 84 1.1.18.2 jdolecek 85 1.1.18.2 jdolecek out: 86 1.1.18.2 jdolecek return result; 87 1.1.18.2 jdolecek } 88 1.1.18.2 jdolecek 89 1.1.18.2 jdolecek static void 90 1.1.18.2 jdolecek octeon_rnm_attach(device_t parent, device_t self, void *aux) 91 1.1.18.2 jdolecek { 92 1.1.18.2 jdolecek struct octeon_rnm_softc *sc = device_private(self); 93 1.1.18.2 jdolecek struct iobus_attach_args *aa = aux; 94 1.1.18.2 jdolecek int status; 95 1.1.18.2 jdolecek 96 1.1.18.2 jdolecek aprint_normal("\n"); 97 1.1.18.2 jdolecek 98 1.1.18.2 jdolecek sc->sc_dev = self; 99 1.1.18.2 jdolecek sc->sc_bust = aa->aa_bust; 100 1.1.18.2 jdolecek status = bus_space_map(aa->aa_bust, aa->aa_unit->addr, RNM_SIZE, 101 1.1.18.2 jdolecek 0, &sc->sc_regh); 102 1.1.18.2 jdolecek if (status != 0) 103 1.1.18.2 jdolecek panic(": can't map i/o space"); 104 1.1.18.2 jdolecek 105 1.1.18.2 jdolecek bus_space_write_8(sc->sc_bust, sc->sc_regh, RNM_CTL_STATUS_OFFSET, 106 1.1.18.2 jdolecek RNM_CTL_STATUS_RNG_EN | RNM_CTL_STATUS_ENT_EN); 107 1.1.18.2 jdolecek 108 1.1.18.2 jdolecek if (hz >= 100) 109 1.1.18.2 jdolecek sc->sc_rnghz = hz / 100; 110 1.1.18.2 jdolecek else 111 1.1.18.2 jdolecek sc->sc_rnghz = 1; 112 1.1.18.2 jdolecek 113 1.1.18.2 jdolecek rnd_attach_source(&sc->sc_rndsrc, device_xname(sc->sc_dev), 114 1.1.18.2 jdolecek RND_TYPE_RNG, RND_FLAG_NO_ESTIMATE); 115 1.1.18.2 jdolecek 116 1.1.18.2 jdolecek callout_init(&sc->sc_rngto, 0); 117 1.1.18.2 jdolecek 118 1.1.18.2 jdolecek octeon_rnm_rng(sc); 119 1.1.18.2 jdolecek 120 1.1.18.2 jdolecek aprint_normal("%s: random number generator enabled: %dhz\n", 121 1.1.18.2 jdolecek device_xname(sc->sc_dev), sc->sc_rnghz); 122 1.1.18.2 jdolecek } 123 1.1.18.2 jdolecek 124 1.1.18.2 jdolecek static void 125 1.1.18.2 jdolecek octeon_rnm_rng(void *vsc) 126 1.1.18.2 jdolecek { 127 1.1.18.2 jdolecek struct octeon_rnm_softc *sc = vsc; 128 1.1.18.2 jdolecek uint64_t rn; 129 1.1.18.2 jdolecek int i; 130 1.1.18.2 jdolecek 131 1.1.18.2 jdolecek for (i = 0; i < octeon_rnm_burst_count; i++) { 132 1.1.18.2 jdolecek rn = octeon_rnm_load(sc); 133 1.1.18.2 jdolecek rnd_add_data(&sc->sc_rndsrc, 134 1.1.18.2 jdolecek &rn, sizeof(rn), sizeof(rn) * NBBY); 135 1.1.18.2 jdolecek /* 136 1.1.18.2 jdolecek * XXX 137 1.1.18.2 jdolecek * delay should be over RNG_DELAY_CLOCK cycles at least, 138 1.1.18.2 jdolecek * we need nanodelay() or clkdelay(). 139 1.1.18.2 jdolecek */ 140 1.1.18.2 jdolecek delay(1); 141 1.1.18.2 jdolecek } 142 1.1.18.2 jdolecek 143 1.1.18.2 jdolecek callout_reset(&sc->sc_rngto, sc->sc_rnghz, octeon_rnm_rng, sc); 144 1.1.18.2 jdolecek } 145 1.1.18.2 jdolecek 146 1.1.18.2 jdolecek static inline uint64_t 147 1.1.18.2 jdolecek octeon_rnm_load(struct octeon_rnm_softc *sc) 148 1.1.18.2 jdolecek { 149 1.1.18.2 jdolecek uint64_t addr = 150 1.1.18.2 jdolecek RNM_OPERATION_BASE_IO_BIT | 151 1.1.18.2 jdolecek __BITS64_SET(RNM_OPERATION_BASE_MAJOR_DID, 0x08) | 152 1.1.18.2 jdolecek __BITS64_SET(RNM_OPERATION_BASE_SUB_DID, 0x00); 153 1.1.18.2 jdolecek 154 1.1.18.2 jdolecek return octeon_xkphys_read_8(addr); 155 1.1.18.2 jdolecek } 156 1.1.18.2 jdolecek 157 1.1.18.2 jdolecek static inline int 158 1.1.18.2 jdolecek octeon_rnm_iobdma(struct octeon_rnm_softc *sc) 159 1.1.18.2 jdolecek { 160 1.1.18.2 jdolecek 161 1.1.18.2 jdolecek /* XXX */ 162 1.1.18.2 jdolecek return 0; 163 1.1.18.2 jdolecek } 164 1.1.18.2 jdolecek 165 1.1.18.2 jdolecek SYSCTL_SETUP(octeon_rnm_sysctl, "sysctl octeon_rnm subtree setup") 166 1.1.18.2 jdolecek { 167 1.1.18.2 jdolecek int rc, root_num; 168 1.1.18.2 jdolecek const struct sysctlnode *node; 169 1.1.18.2 jdolecek 170 1.1.18.2 jdolecek if ( (rc = sysctl_createv(clog, 0, NULL, NULL, 171 1.1.18.2 jdolecek CTLFLAG_PERMANENT, CTLTYPE_NODE, "hw", NULL, 172 1.1.18.2 jdolecek NULL, 0, NULL, 0, CTL_HW, CTL_EOL)) != 0) { 173 1.1.18.2 jdolecek goto err; 174 1.1.18.2 jdolecek } 175 1.1.18.2 jdolecek 176 1.1.18.2 jdolecek if ( (rc = sysctl_createv(clog, 0, NULL, &node, 177 1.1.18.2 jdolecek CTLFLAG_PERMANENT, CTLTYPE_NODE, "octeon_rnm", 178 1.1.18.2 jdolecek SYSCTL_DESCR("octeon_rnm controls"), 179 1.1.18.2 jdolecek NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0) { 180 1.1.18.2 jdolecek goto err; 181 1.1.18.2 jdolecek } 182 1.1.18.2 jdolecek 183 1.1.18.2 jdolecek root_num = node->sysctl_num; 184 1.1.18.2 jdolecek 185 1.1.18.2 jdolecek if ( (rc = sysctl_createv(clog, 0, NULL, NULL, 186 1.1.18.2 jdolecek CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 187 1.1.18.2 jdolecek CTLTYPE_INT, "burst_count", 188 1.1.18.2 jdolecek SYSCTL_DESCR("Burst read count per callout"), 189 1.1.18.2 jdolecek NULL, 0, &octeon_rnm_burst_count, 190 1.1.18.2 jdolecek 0, CTL_HW, root_num, CTL_CREATE, CTL_EOL)) != 0) { 191 1.1.18.2 jdolecek goto err; 192 1.1.18.2 jdolecek } 193 1.1.18.2 jdolecek 194 1.1.18.2 jdolecek return; 195 1.1.18.2 jdolecek err: 196 1.1.18.2 jdolecek printf("%s: sysctl_createv failed (rc = %d)\n", __func__, rc); 197 1.1.18.2 jdolecek } 198
Indexes created Thu Oct 02 14:10:14 GMT 2025