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cxgb3 - Fix potential MAC hang

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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>
This commit is contained in:
Divy Le Ray
2007-03-18 13:10:12 -07:00
committed by Jeff Garzik
parent 2e2839627a
commit fc90664e34
4 changed files with 200 additions and 16 deletions
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15
drivers/net/cxgb3/common.h
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@ -260,6 +260,10 @@ struct mac_stats {
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 @@ struct adapter_params {
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 cmac {
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_address(struct cmac *mac, unsigned int idx, u8 addr[6]);
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,