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net/ncsi: Add NCSI Broadcom OEM command 

This patch adds OEM Broadcom commands and response handling. It also
defines OEM Get MAC Address handler to get and configure the device.

ncsi_oem_gma_handler_bcm: This handler send NCSI broadcom command for
getting mac address.
ncsi_rsp_handler_oem_bcm: This handles response received for all
broadcom OEM commands.
ncsi_rsp_handler_oem_bcm_gma: This handles get mac address response and
set it to device.

Signed-off-by: Vijay Khemka <vijaykhemka@fb.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 2018-10-16 12:13:19 -07:00 committed by David S. Miller
parent 1010c17ec5
commit cb10c7c0df
5 changed files with 147 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/ncsi/Kconfig
View File

@ -10,3 +10,9 @@ config NET_NCSI
support. Enable this only if your system connects to a network
device via NCSI and the ethernet driver you're using supports
the protocol explicitly.
config NCSI_OEM_CMD_GET_MAC
bool "Get NCSI OEM MAC Address"
depends on NET_NCSI
---help---
This allows to get MAC address from NCSI firmware and set them back to
controller.

9
net/ncsi/internal.h
View File

@ -71,6 +71,13 @@ enum {
/* OEM Vendor Manufacture ID */
#define NCSI_OEM_MFR_MLX_ID 0x8119
#define NCSI_OEM_MFR_BCM_ID 0x113d
/* Broadcom specific OEM Command */
#define NCSI_OEM_BCM_CMD_GMA 0x01 /* CMD ID for Get MAC */
/* OEM Command payload lengths*/
#define NCSI_OEM_BCM_CMD_GMA_LEN 12
/* Mac address offset in OEM response */
#define BCM_MAC_ADDR_OFFSET 28
struct ncsi_channel_version {
u32 version; /* Supported BCD encoded NCSI version */
@ -246,6 +253,7 @@ enum {
ncsi_dev_state_probe_dp,
ncsi_dev_state_config_sp = 0x0301,
ncsi_dev_state_config_cis,
ncsi_dev_state_config_oem_gma,
ncsi_dev_state_config_clear_vids,
ncsi_dev_state_config_svf,
ncsi_dev_state_config_ev,
@ -279,6 +287,7 @@ struct ncsi_dev_priv {
#define NCSI_DEV_PROBED 1 /* Finalized NCSI topology */
#define NCSI_DEV_HWA 2 /* Enabled HW arbitration */
#define NCSI_DEV_RESHUFFLE 4
unsigned int gma_flag; /* OEM GMA flag */
spinlock_t lock; /* Protect the NCSI device */
#if IS_ENABLED(CONFIG_IPV6)
unsigned int inet6_addr_num; /* Number of IPv6 addresses */

82
net/ncsi/ncsi-manage.c
View File

@ -651,6 +651,72 @@ static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc,
return 0;
}
#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
/* NCSI OEM Command APIs */
static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca)
{
unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN];
int ret = 0;
nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN;
memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN);
*(unsigned int *)data = ntohl(NCSI_OEM_MFR_BCM_ID);
data[5] = NCSI_OEM_BCM_CMD_GMA;
nca->data = data;
ret = ncsi_xmit_cmd(nca);
if (ret)
netdev_err(nca->ndp->ndev.dev,
"NCSI: Failed to transmit cmd 0x%x during configure\n",
nca->type);
return ret;
}
/* OEM Command handlers initialization */
static struct ncsi_oem_gma_handler {
unsigned int mfr_id;
int (*handler)(struct ncsi_cmd_arg *nca);
} ncsi_oem_gma_handlers[] = {
{ NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm }
};
static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id)
{
struct ncsi_oem_gma_handler *nch = NULL;
int i;
/* This function should only be called once, return if flag set */
if (nca->ndp->gma_flag == 1)
return -1;
/* Find gma handler for given manufacturer id */
for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) {
if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) {
if (ncsi_oem_gma_handlers[i].handler)
nch = &ncsi_oem_gma_handlers[i];
break;
}
}
if (!nch) {
netdev_err(nca->ndp->ndev.dev,
"NCSI: No GMA handler available for MFR-ID (0x%x)\n",
mf_id);
return -1;
}
/* Set the flag for GMA command which should only be called once */
nca->ndp->gma_flag = 1;
/* Get Mac address from NCSI device */
return nch->handler(nca);
}
#endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
{
struct ncsi_dev *nd = &ndp->ndev;
@ -701,7 +767,23 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
goto error;
}
nd->state = ncsi_dev_state_config_oem_gma;
break;
case ncsi_dev_state_config_oem_gma:
nd->state = ncsi_dev_state_config_clear_vids;
ret = -1;
#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
nca.type = NCSI_PKT_CMD_OEM;
nca.package = np->id;
nca.channel = nc->id;
ndp->pending_req_num = 1;
ret = ncsi_gma_handler(&nca, nc->version.mf_id);
#endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
if (ret < 0)
schedule_work(&ndp->work);
break;
case ncsi_dev_state_config_clear_vids:
case ncsi_dev_state_config_svf:

8
net/ncsi/ncsi-pkt.h
View File

@ -165,6 +165,14 @@ struct ncsi_rsp_oem_pkt {
unsigned char data[]; /* Payload data */
};
/* Broadcom Response Data */
struct ncsi_rsp_oem_bcm_pkt {
unsigned char ver; /* Payload Version */
unsigned char type; /* OEM Command type */
__be16 len; /* Payload Length */
unsigned char data[]; /* Cmd specific Data */
};
/* Get Link Status */
struct ncsi_rsp_gls_pkt {
struct ncsi_rsp_pkt_hdr rsp; /* Response header */

44
net/ncsi/ncsi-rsp.c
View File

@ -611,19 +611,59 @@ static int ncsi_rsp_handler_snfc(struct ncsi_request *nr)
return 0;
}
/* Response handler for Broadcom command Get Mac Address */
static int ncsi_rsp_handler_oem_bcm_gma(struct ncsi_request *nr)
{
struct ncsi_dev_priv *ndp = nr->ndp;
struct net_device *ndev = ndp->ndev.dev;
const struct net_device_ops *ops = ndev->netdev_ops;
struct ncsi_rsp_oem_pkt *rsp;
struct sockaddr saddr;
int ret = 0;
/* Get the response header */
rsp = (struct ncsi_rsp_oem_pkt *)skb_network_header(nr->rsp);
saddr.sa_family = ndev->type;
ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
memcpy(saddr.sa_data, &rsp->data[BCM_MAC_ADDR_OFFSET], ETH_ALEN);
/* Increase mac address by 1 for BMC's address */
saddr.sa_data[ETH_ALEN - 1]++;
ret = ops->ndo_set_mac_address(ndev, &saddr);
if (ret < 0)
netdev_warn(ndev, "NCSI: 'Writing mac address to device failed\n");
return ret;
}
/* Response handler for Broadcom card */
static int ncsi_rsp_handler_oem_bcm(struct ncsi_request *nr)
{
struct ncsi_rsp_oem_bcm_pkt *bcm;
struct ncsi_rsp_oem_pkt *rsp;
/* Get the response header */
rsp = (struct ncsi_rsp_oem_pkt *)skb_network_header(nr->rsp);
bcm = (struct ncsi_rsp_oem_bcm_pkt *)(rsp->data);
if (bcm->type == NCSI_OEM_BCM_CMD_GMA)
return ncsi_rsp_handler_oem_bcm_gma(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 }
{ NCSI_OEM_MFR_BCM_ID, ncsi_rsp_handler_oem_bcm }
};
/* 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;
struct ncsi_rsp_oem_pkt *rsp;
unsigned int mfr_id, i;
/* Get the response header */