cxgb3 - Fix potential MAC hang
Under rare conditions, the MAC might hang while generating a pause frame.
This patch fine tunes the MAC settings to avoid the issue, allows for
periodic MAC state check, and triggers a recovery if hung.
Also fix one MAC statistics counter for the rev board T3B2.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/cxgb3/common.h b/drivers/net/cxgb3/common.h
index e23deeb..85e5543 100644
--- a/drivers/net/cxgb3/common.h
+++ b/drivers/net/cxgb3/common.h
@@ -260,6 +260,10 @@
unsigned long serdes_signal_loss;
unsigned long xaui_pcs_ctc_err;
unsigned long xaui_pcs_align_change;
+
+ unsigned long num_toggled; /* # times toggled TxEn due to stuck TX */
+ unsigned long num_resets; /* # times reset due to stuck TX */
+
};
struct tp_mib_stats {
@@ -400,6 +404,12 @@
unsigned int rev; /* chip revision */
};
+enum { /* chip revisions */
+ T3_REV_A = 0,
+ T3_REV_B = 2,
+ T3_REV_B2 = 3,
+};
+
struct trace_params {
u32 sip;
u32 sip_mask;
@@ -465,6 +475,10 @@
struct adapter *adapter;
unsigned int offset;
unsigned int nucast; /* # of address filters for unicast MACs */
+ unsigned int tcnt;
+ unsigned int xcnt;
+ unsigned int toggle_cnt;
+ unsigned int txen;
struct mac_stats stats;
};
@@ -666,6 +680,7 @@
int t3_mac_set_num_ucast(struct cmac *mac, int n);
const struct mac_stats *t3_mac_update_stats(struct cmac *mac);
int t3_mac_set_speed_duplex_fc(struct cmac *mac, int speed, int duplex, int fc);
+int t3b2_mac_watchdog_task(struct cmac *mac);
void t3_mc5_prep(struct adapter *adapter, struct mc5 *mc5, int mode);
int t3_mc5_init(struct mc5 *mc5, unsigned int nservers, unsigned int nfilters,