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
ogxnexus_match(struct device * parent,void * match,void * aux)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
ogxnexus_attach(struct device * parent,struct device * self,void * aux)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