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cxgb4: Decode link down reason code obtained from firmware

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Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hariprasad Shenai 2016-04-26 20:10:29 +05:30 committed by David S. Miller
parent 23853a0a9a
commit ddc7740d9a
3 changed files with 40 additions and 0 deletions
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1
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
View File

@ -396,6 +396,7 @@ struct link_config {
unsigned char fc; /* actual link flow control */
unsigned char autoneg; /* autonegotiating? */
unsigned char link_ok; /* link up? */
unsigned char link_down_rc; /* link down reason */
};
#define FW_LEN16(fw_struct) FW_CMD_LEN16_V(sizeof(fw_struct) / 16)

34
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
View File

@ -7102,6 +7102,32 @@ int t4_ofld_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
}
/**
* t4_link_down_rc_str - return a string for a Link Down Reason Code
* @adap: the adapter
* @link_down_rc: Link Down Reason Code
*
* Returns a string representation of the Link Down Reason Code.
*/
static const char *t4_link_down_rc_str(unsigned char link_down_rc)
{
static const char * const reason[] = {
"Link Down",
"Remote Fault",
"Auto-negotiation Failure",
"Reserved",
"Insufficient Airflow",
"Unable To Determine Reason",
"No RX Signal Detected",
"Reserved",
};
if (link_down_rc >= ARRAY_SIZE(reason))
return "Bad Reason Code";
return reason[link_down_rc];
}
/**
* t4_handle_get_port_info - process a FW reply message
* @pi: the port info
@ -7142,6 +7168,14 @@ void t4_handle_get_port_info(struct port_info *pi, const __be64 *rpl)
}
if (link_ok != lc->link_ok || speed != lc->speed ||
fc != lc->fc) { /* something changed */
if (!link_ok && lc->link_ok) {
unsigned char rc = FW_PORT_CMD_LINKDNRC_G(stat);
lc->link_down_rc = rc;
dev_warn(adap->pdev_dev,
"Port %d link down, reason: %s\n",
pi->port_id, t4_link_down_rc_str(rc));
}
lc->link_ok = link_ok;
lc->speed = speed;
lc->fc = fc;

5
drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
View File

@ -2510,6 +2510,11 @@ struct fw_port_cmd {
#define FW_PORT_CMD_PTYPE_G(x) \
(((x) >> FW_PORT_CMD_PTYPE_S) & FW_PORT_CMD_PTYPE_M)
#define FW_PORT_CMD_LINKDNRC_S 5
#define FW_PORT_CMD_LINKDNRC_M 0x7
#define FW_PORT_CMD_LINKDNRC_G(x) \
(((x) >> FW_PORT_CMD_LINKDNRC_S) & FW_PORT_CMD_LINKDNRC_M)
#define FW_PORT_CMD_MODTYPE_S 0
#define FW_PORT_CMD_MODTYPE_M 0x1f
#define FW_PORT_CMD_MODTYPE_V(x) ((x) << FW_PORT_CMD_MODTYPE_S)