1 /* $OpenBSD: vcc.c,v 1.2 2021/10/24 17:05:04 mpi Exp $ */
2 /*
3 * Copyright (c) 2009 Mark Kettenis
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/param.h>
19 #include <sys/buf.h>
20 #include <sys/device.h>
21 #include <sys/malloc.h>
22 #include <sys/systm.h>
23
24 #include <machine/autoconf.h>
25 #include <machine/hypervisor.h>
26 #include <machine/mdesc.h>
27
28 #include <sparc64/dev/cbusvar.h>
29
30 #ifdef VCC_DEBUG
31 #define DPRINTF(x) printf x
32 #else
33 #define DPRINTF(x)
34 #endif
35
36 struct vcc_softc {
37 struct device sc_dv;
38 bus_space_tag_t sc_bustag;
39 bus_dma_tag_t sc_dmatag;
40 };
41
42 int vcc_match(struct device *, void *, void *);
43 void vcc_attach(struct device *, struct device *, void *);
44
45 const struct cfattach vcc_ca = {
46 sizeof(struct vcc_softc), vcc_match, vcc_attach
47 };
48
49 struct cfdriver vcc_cd = {
50 NULL, "vcc", DV_DULL
51 };
52
53 void vcc_get_channel_endpoint(int, struct cbus_attach_args *);
54
55 int
vcc_match(struct device * parent,void * match,void * aux)56 vcc_match(struct device *parent, void *match, void *aux)
57 {
58 struct cbus_attach_args *ca = aux;
59
60 if (strcmp(ca->ca_name, "virtual-console-concentrator") == 0)
61 return (1);
62
63 return (0);
64 }
65
66 void
vcc_attach(struct device * parent,struct device * self,void * aux)67 vcc_attach(struct device *parent, struct device *self, void *aux)
68 {
69 struct cbus_attach_args *ca = aux;
70 struct cbus_attach_args nca;
71 struct md_header *hdr;
72 struct md_element *elem;
73 const char *name_blk;
74 const char *str;
75 int idx;
76 int arc;
77
78 printf("\n");
79
80 hdr = (struct md_header *)mdesc;
81 elem = (struct md_element *)(mdesc + sizeof(struct md_header));
82 name_blk = mdesc + sizeof(struct md_header) + hdr->node_blk_sz;
83
84 idx = ca->ca_idx;
85 for (; elem[idx].tag != 'E'; idx++) {
86 str = name_blk + elem[idx].name_offset;
87 if (elem[idx].tag != 'a' || strcmp(str, "fwd") != 0)
88 continue;
89
90 arc = elem[idx].d.val;
91 str = name_blk + elem[arc].name_offset;
92 if (strcmp(str, "virtual-device-port") == 0) {
93 str = mdesc_get_prop_str(arc, "vcc-domain-name");
94 if (str) {
95 bzero(&nca, sizeof(nca));
96 nca.ca_name = str;
97 nca.ca_node = ca->ca_node;
98 nca.ca_bustag = ca->ca_bustag;
99 nca.ca_dmatag = ca->ca_dmatag;
100 vcc_get_channel_endpoint(arc, &nca);
101 config_found(self, &nca, cbus_print);
102 }
103 }
104 }
105 }
106
107 void
vcc_get_channel_endpoint(int idx,struct cbus_attach_args * ca)108 vcc_get_channel_endpoint(int idx, struct cbus_attach_args *ca)
109 {
110 struct md_header *hdr;
111 struct md_element *elem;
112 const char *name_blk;
113 const char *str;
114 int arc;
115
116 hdr = (struct md_header *)mdesc;
117 elem = (struct md_element *)(mdesc + sizeof(struct md_header));
118 name_blk = mdesc + sizeof(struct md_header) + hdr->node_blk_sz;
119
120 ca->ca_idx = idx;
121
122 ca->ca_id = -1;
123 ca->ca_tx_ino = -1;
124 ca->ca_rx_ino = -1;
125
126 for (; elem[idx].tag != 'E'; idx++) {
127 str = name_blk + elem[idx].name_offset;
128 if (elem[idx].tag != 'a' || strcmp(str, "fwd") != 0)
129 continue;
130
131 arc = elem[idx].d.val;
132 str = name_blk + elem[arc].name_offset;
133 if (strcmp(str, "channel-endpoint") == 0) {
134 ca->ca_id = mdesc_get_prop_val(arc, "id");
135 ca->ca_tx_ino = mdesc_get_prop_val(arc, "tx-ino");
136 ca->ca_rx_ino = mdesc_get_prop_val(arc, "rx-ino");
137 return;
138 }
139 }
140 }
141