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net/ncsi: Add NCSI OEM command support

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This patch adds OEM commands and response handling. It also defines OEM
command and response structure as per NCSI specification along with its
handlers.

ncsi_cmd_handler_oem: This is a generic command request handler for OEM
commands
ncsi_rsp_handler_oem: This is a generic response handler for OEM commands

Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Reviewed-by: Justin Lee <justin.lee1@dell.com>
Reviewed-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vijay Khemka 2018-10-05 10:46:01 -07:00 committed by David S. Miller
parent 6f8474922b
commit fb4ee67529
4 changed files with 88 additions and 4 deletions
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5
net/ncsi/internal.h
View File

@ -68,6 +68,10 @@ enum {
NCSI_MODE_MAX
};
/* OEM Vendor Manufacture ID */
#define NCSI_OEM_MFR_MLX_ID 0x8119
#define NCSI_OEM_MFR_BCM_ID 0x113d
struct ncsi_channel_version {
u32 version; /* Supported BCD encoded NCSI version */
u32 alpha2; /* Supported BCD encoded NCSI version */
@ -305,6 +309,7 @@ struct ncsi_cmd_arg {
unsigned short words[8];
unsigned int dwords[4];
};
unsigned char *data; /* NCSI OEM data */
};
extern struct list_head ncsi_dev_list;

30
net/ncsi/ncsi-cmd.c
View File

@ -211,6 +211,25 @@ static int ncsi_cmd_handler_snfc(struct sk_buff *skb,
return 0;
}
static int ncsi_cmd_handler_oem(struct sk_buff *skb,
struct ncsi_cmd_arg *nca)
{
struct ncsi_cmd_oem_pkt *cmd;
unsigned int len;
len = sizeof(struct ncsi_cmd_pkt_hdr) + 4;
if (nca->payload < 26)
len += 26;
else
len += nca->payload;
cmd = skb_put_zero(skb, len);
memcpy(&cmd->mfr_id, nca->data, nca->payload);
ncsi_cmd_build_header(&cmd->cmd.common, nca);
return 0;
}
static struct ncsi_cmd_handler {
unsigned char type;
int payload;
@ -244,7 +263,7 @@ static struct ncsi_cmd_handler {
{ NCSI_PKT_CMD_GNS, 0, ncsi_cmd_handler_default },
{ NCSI_PKT_CMD_GNPTS, 0, ncsi_cmd_handler_default },
{ NCSI_PKT_CMD_GPS, 0, ncsi_cmd_handler_default },
{ NCSI_PKT_CMD_OEM, 0, NULL },
{ NCSI_PKT_CMD_OEM, -1, ncsi_cmd_handler_oem },
{ NCSI_PKT_CMD_PLDM, 0, NULL },
{ NCSI_PKT_CMD_GPUUID, 0, ncsi_cmd_handler_default }
};
@ -316,8 +335,13 @@ int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca)
return -ENOENT;
}
/* Get packet payload length and allocate the request */
nca->payload = nch->payload;
/* Get packet payload length and allocate the request
* It is expected that if length set as negative in
* handler structure means caller is initializing it
* and setting length in nca before calling xmit function
*/
if (nch->payload >= 0)
nca->payload = nch->payload;
nr = ncsi_alloc_command(nca);
if (!nr)
return -ENOMEM;

14
net/ncsi/ncsi-pkt.h
View File

@ -151,6 +151,20 @@ struct ncsi_cmd_snfc_pkt {
unsigned char pad[22];
};
/* OEM Request Command as per NCSI Specification */
struct ncsi_cmd_oem_pkt {
struct ncsi_cmd_pkt_hdr cmd; /* Command header */
__be32 mfr_id; /* Manufacture ID */
unsigned char data[]; /* OEM Payload Data */
};
/* OEM Response Packet as per NCSI Specification */
struct ncsi_rsp_oem_pkt {
struct ncsi_rsp_pkt_hdr rsp; /* Command header */
__be32 mfr_id; /* Manufacture ID */
unsigned char data[]; /* Payload data */
};
/* Get Link Status */
struct ncsi_rsp_gls_pkt {
struct ncsi_rsp_pkt_hdr rsp; /* Response header */

43
net/ncsi/ncsi-rsp.c
View File

@ -596,6 +596,47 @@ static int ncsi_rsp_handler_snfc(struct ncsi_request *nr)
return 0;
}
static struct ncsi_rsp_oem_handler {
unsigned int mfr_id;
int (*handler)(struct ncsi_request *nr);
} ncsi_rsp_oem_handlers[] = {
{ NCSI_OEM_MFR_MLX_ID, NULL },
{ NCSI_OEM_MFR_BCM_ID, NULL }
};
/* Response handler for OEM command */
static int ncsi_rsp_handler_oem(struct ncsi_request *nr)
{
struct ncsi_rsp_oem_pkt *rsp;
struct ncsi_rsp_oem_handler *nrh = NULL;
unsigned int mfr_id, i;
/* Get the response header */
rsp = (struct ncsi_rsp_oem_pkt *)skb_network_header(nr->rsp);
mfr_id = ntohl(rsp->mfr_id);
/* Check for manufacturer id and Find the handler */
for (i = 0; i < ARRAY_SIZE(ncsi_rsp_oem_handlers); i++) {
if (ncsi_rsp_oem_handlers[i].mfr_id == mfr_id) {
if (ncsi_rsp_oem_handlers[i].handler)
nrh = &ncsi_rsp_oem_handlers[i];
else
nrh = NULL;
break;
}
}
if (!nrh) {
netdev_err(nr->ndp->ndev.dev, "Received unrecognized OEM packet with MFR-ID (0x%x)\n",
mfr_id);
return -ENOENT;
}
/* Process the packet */
return nrh->handler(nr);
}
static int ncsi_rsp_handler_gvi(struct ncsi_request *nr)
{
struct ncsi_rsp_gvi_pkt *rsp;
@ -932,7 +973,7 @@ static struct ncsi_rsp_handler {
{ NCSI_PKT_RSP_GNS, 172, ncsi_rsp_handler_gns },
{ NCSI_PKT_RSP_GNPTS, 172, ncsi_rsp_handler_gnpts },
{ NCSI_PKT_RSP_GPS, 8, ncsi_rsp_handler_gps },
{ NCSI_PKT_RSP_OEM, 0, NULL },
{ NCSI_PKT_RSP_OEM, -1, ncsi_rsp_handler_oem },
{ NCSI_PKT_RSP_PLDM, 0, NULL },
{ NCSI_PKT_RSP_GPUUID, 20, ncsi_rsp_handler_gpuuid }
};