diff options
Diffstat (limited to 'drivers/net/cxgb3/cxgb3_main.c')
| -rw-r--r-- | drivers/net/cxgb3/cxgb3_main.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c index c32f514c41a..9ff0452fcdd 100644 --- a/drivers/net/cxgb3/cxgb3_main.c +++ b/drivers/net/cxgb3/cxgb3_main.c @@ -2471,6 +2471,8 @@ static void t3_adap_check_task(struct work_struct *work) struct adapter *adapter = container_of(work, struct adapter, adap_check_task.work); const struct adapter_params *p = &adapter->params; + int port; + unsigned int v, status, reset; adapter->check_task_cnt++; @@ -2489,6 +2491,54 @@ static void t3_adap_check_task(struct work_struct *work) if (p->rev == T3_REV_B2) check_t3b2_mac(adapter); + /* + * Scan the XGMAC's to check for various conditions which we want to + * monitor in a periodic polling manner rather than via an interrupt + * condition. This is used for conditions which would otherwise flood + * the system with interrupts and we only really need to know that the + * conditions are "happening" ... For each condition we count the + * detection of the condition and reset it for the next polling loop. + */ + for_each_port(adapter, port) { + struct cmac *mac = &adap2pinfo(adapter, port)->mac; + u32 cause; + + cause = t3_read_reg(adapter, A_XGM_INT_CAUSE + mac->offset); + reset = 0; + if (cause & F_RXFIFO_OVERFLOW) { + mac->stats.rx_fifo_ovfl++; + reset |= F_RXFIFO_OVERFLOW; + } + + t3_write_reg(adapter, A_XGM_INT_CAUSE + mac->offset, reset); + } + + /* + * We do the same as above for FL_EMPTY interrupts. + */ + status = t3_read_reg(adapter, A_SG_INT_CAUSE); + reset = 0; + + if (status & F_FLEMPTY) { + struct sge_qset *qs = &adapter->sge.qs[0]; + int i = 0; + + reset |= F_FLEMPTY; + + v = (t3_read_reg(adapter, A_SG_RSPQ_FL_STATUS) >> S_FL0EMPTY) & + 0xffff; + + while (v) { + qs->fl[i].empty += (v & 1); + if (i) + qs++; + i ^= 1; + v >>= 1; + } + } + + t3_write_reg(adapter, A_SG_INT_CAUSE, reset); + /* Schedule the next check update if any port is active. */ spin_lock_irq(&adapter->work_lock); if (adapter->open_device_map & PORT_MASK) |