Commit fb4ee675 authored by Vijay Khemka's avatar Vijay Khemka Committed by David S. Miller
Browse files

net/ncsi: Add NCSI OEM command support 



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: default avatarVijay Khemka <vijaykhemka@fb.com>
Reviewed-by: default avatarJustin Lee <justin.lee1@dell.com>
Reviewed-by: default avatarSamuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6f847492

net/ncsi/internal.h

+5 −0
Original line number Diff line number Diff line
@@ -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;

net/ncsi/ncsi-cmd.c

+27 −3
Original line number Diff line number Diff line
@@ -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 }

};
@@ -316,7 +335,12 @@ int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca) 
		return -ENOENT;

	}



	/* Get packet payload length and allocate the request */

	/* 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)

net/ncsi/ncsi-pkt.h

+14 −0
Original line number Diff line number Diff line
@@ -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   */

net/ncsi/ncsi-rsp.c

+42 −1
Original line number Diff line number Diff line
@@ -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  }

};

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