[PATCH v2] net/ncsi: Add NCSI OEM command support
Samuel Mendoza-Jonas
sam at mendozajonas.com
Tue Oct 2 11:20:23 AEST 2018
On Fri, 2018-09-28 at 18:06 -0700, Vijay Khemka wrote:
> 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 at fb.com>
Hi Vijay - looks good to me, and should be a good common base for your
and Justin's changes.
Reviewed-by: Samuel Mendoza-Jonas <sam at mendozajonas.com>
> ---
> net/ncsi/internal.h | 4 ++++
> net/ncsi/ncsi-cmd.c | 31 ++++++++++++++++++++++++++++---
> net/ncsi/ncsi-pkt.h | 16 ++++++++++++++++
> net/ncsi/ncsi-rsp.c | 44 +++++++++++++++++++++++++++++++++++++++++++-
> 4 files changed, 91 insertions(+), 4 deletions(-)
>
> diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h
> index 8055e3965cef..c16cb7223064 100644
> --- a/net/ncsi/internal.h
> +++ b/net/ncsi/internal.h
> @@ -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 */
> diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c
> index 7567ca63aae2..2f98533eba46 100644
> --- a/net/ncsi/ncsi-cmd.c
> +++ b/net/ncsi/ncsi-cmd.c
> @@ -211,6 +211,26 @@ 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);
> + cmd->mfr_id = nca->dwords[0];
> + memcpy(cmd->data, &nca->dwords[1], nca->payload - 4);
> + ncsi_cmd_build_header(&cmd->cmd.common, nca);
> +
> + return 0;
> +}
> +
> static struct ncsi_cmd_handler {
> unsigned char type;
> int payload;
> @@ -244,7 +264,7 @@ 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 +336,13 @@ 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;
> diff --git a/net/ncsi/ncsi-pkt.h b/net/ncsi/ncsi-pkt.h
> index 91b4b66438df..1f338386810d 100644
> --- a/net/ncsi/ncsi-pkt.h
> +++ b/net/ncsi/ncsi-pkt.h
> @@ -151,6 +151,22 @@ 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[64]; /* OEM Payload Data */
> + __be32 checksum; /* Checksum */
> +};
> +
> +/* 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[64]; /* Payload data */
> + __be32 checksum; /* Checksum */
> +};
> +
> /* Get Link Status */
> struct ncsi_rsp_gls_pkt {
> struct ncsi_rsp_pkt_hdr rsp; /* Response header */
> diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c
> index 930c1d3796f0..22664ebdc93a 100644
> --- a/net/ncsi/ncsi-rsp.c
> +++ b/net/ncsi/ncsi-rsp.c
> @@ -596,6 +596,48 @@ 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 +974,7 @@ 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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