summaryrefslogtreecommitdiffstats
path: root/slirp/ncsi.c
blob: d12ba3e494b07c35af02e8e2ea4f890edd427736 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
/*
 * NC-SI (Network Controller Sideband Interface) "echo" model
 *
 * Copyright (C) 2016 IBM Corp.
 *
 * This code is licensed under the GPL version 2 or later. See the
 * COPYING file in the top-level directory.
 */
#include "qemu/osdep.h"
#include "slirp.h"

#include "ncsi-pkt.h"

/* Get Capabilities */
static int ncsi_rsp_handler_gc(struct ncsi_rsp_pkt_hdr *rnh)
{
    struct ncsi_rsp_gc_pkt *rsp = (struct ncsi_rsp_gc_pkt *) rnh;

    rsp->cap = htonl(~0);
    rsp->bc_cap = htonl(~0);
    rsp->mc_cap = htonl(~0);
    rsp->buf_cap = htonl(~0);
    rsp->aen_cap = htonl(~0);
    rsp->vlan_mode = 0xff;
    rsp->uc_cnt = 2;
    return 0;
}

/* Get Link status */
static int ncsi_rsp_handler_gls(struct ncsi_rsp_pkt_hdr *rnh)
{
    struct ncsi_rsp_gls_pkt *rsp = (struct ncsi_rsp_gls_pkt *) rnh;

    rsp->status = htonl(0x1);
    return 0;
}

static const struct ncsi_rsp_handler {
        unsigned char   type;
        int             payload;
        int             (*handler)(struct ncsi_rsp_pkt_hdr *rnh);
} ncsi_rsp_handlers[] = {
        { NCSI_PKT_RSP_CIS,     4, NULL },
        { NCSI_PKT_RSP_SP,      4, NULL },
        { NCSI_PKT_RSP_DP,      4, NULL },
        { NCSI_PKT_RSP_EC,      4, NULL },
        { NCSI_PKT_RSP_DC,      4, NULL },
        { NCSI_PKT_RSP_RC,      4, NULL },
        { NCSI_PKT_RSP_ECNT,    4, NULL },
        { NCSI_PKT_RSP_DCNT,    4, NULL },
        { NCSI_PKT_RSP_AE,      4, NULL },
        { NCSI_PKT_RSP_SL,      4, NULL },
        { NCSI_PKT_RSP_GLS,    16, ncsi_rsp_handler_gls },
        { NCSI_PKT_RSP_SVF,     4, NULL },
        { NCSI_PKT_RSP_EV,      4, NULL },
        { NCSI_PKT_RSP_DV,      4, NULL },
        { NCSI_PKT_RSP_SMA,     4, NULL },
        { NCSI_PKT_RSP_EBF,     4, NULL },
        { NCSI_PKT_RSP_DBF,     4, NULL },
        { NCSI_PKT_RSP_EGMF,    4, NULL },
        { NCSI_PKT_RSP_DGMF,    4, NULL },
        { NCSI_PKT_RSP_SNFC,    4, NULL },
        { NCSI_PKT_RSP_GVI,    36, NULL },
        { NCSI_PKT_RSP_GC,     32, ncsi_rsp_handler_gc },
        { NCSI_PKT_RSP_GP,     -1, NULL },
        { NCSI_PKT_RSP_GCPS,  172, NULL },
        { NCSI_PKT_RSP_GNS,   172, NULL },
        { NCSI_PKT_RSP_GNPTS, 172, NULL },
        { NCSI_PKT_RSP_GPS,     8, NULL },
        { NCSI_PKT_RSP_OEM,     0, NULL },
        { NCSI_PKT_RSP_PLDM,    0, NULL },
        { NCSI_PKT_RSP_GPUUID, 20, NULL }
};

/*
 * packet format : ncsi header + payload + checksum
 */
#define NCSI_MAX_PAYLOAD 172
#define NCSI_MAX_LEN     (sizeof(struct ncsi_pkt_hdr) + NCSI_MAX_PAYLOAD + 4)

void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
{
    struct ncsi_pkt_hdr *nh = (struct ncsi_pkt_hdr *)(pkt + ETH_HLEN);
    uint8_t ncsi_reply[ETH_HLEN + NCSI_MAX_LEN];
    struct ethhdr *reh = (struct ethhdr *)ncsi_reply;
    struct ncsi_rsp_pkt_hdr *rnh = (struct ncsi_rsp_pkt_hdr *)
        (ncsi_reply + ETH_HLEN);
    const struct ncsi_rsp_handler *handler = NULL;
    int i;

    memset(ncsi_reply, 0, sizeof(ncsi_reply));

    memset(reh->h_dest, 0xff, ETH_ALEN);
    memset(reh->h_source, 0xff, ETH_ALEN);
    reh->h_proto = htons(ETH_P_NCSI);

    for (i = 0; i < ARRAY_SIZE(ncsi_rsp_handlers); i++) {
        if (ncsi_rsp_handlers[i].type == nh->type + 0x80) {
            handler = &ncsi_rsp_handlers[i];
            break;
        }
    }

    rnh->common.mc_id      = nh->mc_id;
    rnh->common.revision   = NCSI_PKT_REVISION;
    rnh->common.id         = nh->id;
    rnh->common.type       = nh->type + 0x80;
    rnh->common.channel    = nh->channel;

    if (handler) {
        rnh->common.length = htons(handler->payload);
        rnh->code          = htons(NCSI_PKT_RSP_C_COMPLETED);
        rnh->reason        = htons(NCSI_PKT_RSP_R_NO_ERROR);

        if (handler->handler) {
            /* TODO: handle errors */
            handler->handler(rnh);
        }
    } else {
        rnh->common.length = 0;
        rnh->code          = htons(NCSI_PKT_RSP_C_UNAVAILABLE);
        rnh->reason        = htons(NCSI_PKT_RSP_R_UNKNOWN);
    }

    /* TODO: add a checksum at the end of the frame but the specs
     * allows it to be zero */

    slirp_output(slirp->opaque, ncsi_reply, ETH_HLEN + sizeof(*nh) +
                 (handler ? handler->payload : 0) + 4);
}