1 /* $OpenBSD: ogxnexus.c,v 1.1 2019/11/04 14:58:40 visa Exp $ */ 2 3 /* 4 * Copyright (c) 2019 Visa Hankala 5 * 6 * Permission to use, copy, modify, and/or distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /* 20 * Driver for OCTEON BGX nexus. 21 */ 22 23 #include <sys/param.h> 24 #include <sys/systm.h> 25 #include <sys/device.h> 26 27 #include <dev/ofw/fdt.h> 28 #include <dev/ofw/openfirm.h> 29 30 #include <machine/bus.h> 31 #include <machine/fdt.h> 32 33 #include <octeon/dev/ogxreg.h> 34 #include <octeon/dev/ogxvar.h> 35 36 struct ogxnexus_softc { 37 struct device sc_dev; 38 bus_space_tag_t sc_iot; 39 bus_space_handle_t sc_ioh; 40 int sc_bgxid; 41 }; 42 43 #define NEXUS_RD_8(sc, reg) \ 44 bus_space_write_8((sc)->sc_iot, (sc)->sc_ioh, (reg)) 45 #define NEXUS_WR_8(sc, reg, val) \ 46 bus_space_write_8((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) 47 48 int ogxnexus_match(struct device *, void *, void *); 49 void ogxnexus_attach(struct device *, struct device *, void *); 50 51 const struct cfattach ogxnexus_ca = { 52 sizeof(struct ogxnexus_softc), ogxnexus_match, ogxnexus_attach 53 }; 54 55 struct cfdriver ogxnexus_cd = { 56 NULL, "ogxnexus", DV_DULL 57 }; 58 59 int 60 ogxnexus_match(struct device *parent, void *match, void *aux) 61 { 62 struct fdt_attach_args *faa = aux; 63 64 return OF_is_compatible(faa->fa_node, "cavium,octeon-7890-bgx"); 65 } 66 67 void 68 ogxnexus_attach(struct device *parent, struct device *self, void *aux) 69 { 70 struct ogx_attach_args oaa; 71 struct fdt_attach_args *faa = aux; 72 struct ogxnexus_softc *sc = (struct ogxnexus_softc *)self; 73 int i, node; 74 75 if (faa->fa_nreg < 1) { 76 printf(": no registers\n"); 77 return; 78 } 79 80 sc->sc_bgxid = (faa->fa_reg[0].addr >> 24) & 7; 81 82 sc->sc_iot = faa->fa_iot; 83 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, 84 0, &sc->sc_ioh)) { 85 printf(": can't map IO space\n"); 86 return; 87 } 88 89 /* Disable all CAM entries. */ 90 for (i = 0; i < BGX_NCAM; i++) 91 NEXUS_WR_8(sc, BGX_CMR_RX_ADR_CAM(i), 0); 92 93 /* Set the number of LMACs per BGX. */ 94 NEXUS_WR_8(sc, BGX_CMR_RX_LMACS, BGX_NLMAC); 95 NEXUS_WR_8(sc, BGX_CMR_TX_LMACS, BGX_NLMAC); 96 97 printf("\n"); 98 99 for (node = OF_child(faa->fa_node); node != 0; node = OF_peer(node)) { 100 memset(&oaa, 0, sizeof(oaa)); 101 oaa.oaa_node = node; 102 oaa.oaa_bgxid = sc->sc_bgxid; 103 oaa.oaa_iot = sc->sc_iot; 104 oaa.oaa_ioh = sc->sc_ioh; 105 oaa.oaa_dmat = faa->fa_dmat; 106 107 config_found(&sc->sc_dev, &oaa, NULL); 108 } 109 } 110