qlcnic: Loopback Inter Driver Communication AEN handler

o Loopback initiator function drivers should process loopback time extend AEN.
  These AENs are triggered by the loopback time extend mailbox command
  issued by the target function drivers.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 37 insertions, 9 deletions

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
index 9ae5d2eb1a2d..86dd695143a5 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h
@@ -467,6 +467,7 @@ struct qlcnic_hardware_context {
         u32 mbox_aen[QLC_83XX_MBX_AEN_CNT];
         u32 mbox_reg[4];
         struct qlcnic_mailbox *mailbox;
+        u8 extend_lb_time;
 };
 
 struct qlcnic_adapter_stats {
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
index e53caaaf1303..c5daf78539ab 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
@@ -860,9 +860,9 @@ static void qlcnic_83xx_handle_idc_comp_aen(struct qlcnic_adapter *adapter,
 
 void __qlcnic_83xx_process_aen(struct qlcnic_adapter *adapter)
 {
+        struct qlcnic_hardware_context *ahw = adapter->ahw;
         u32 event[QLC_83XX_MBX_AEN_CNT];
         int i;
-        struct qlcnic_hardware_context *ahw = adapter->ahw;
 
         for (i = 0; i < QLC_83XX_MBX_AEN_CNT; i++)
                 event[i] = readl(QLCNIC_MBX_FW(ahw, i));
@@ -882,6 +882,7 @@ void __qlcnic_83xx_process_aen(struct qlcnic_adapter *adapter)
                                    &adapter->idc_aen_work, 0);
                 break;
         case QLCNIC_MBX_TIME_EXTEND_EVENT:
+                ahw->extend_lb_time = event[1] >> 8 & 0xf;
                 break;
         case QLCNIC_MBX_BC_EVENT:
                 qlcnic_sriov_handle_bc_event(adapter, event[1]);
@@ -1706,13 +1707,28 @@ fail_diag_alloc:
         return ret;
 }
 
+static void qlcnic_extend_lb_idc_cmpltn_wait(struct qlcnic_adapter *adapter,
+                                             u32 *max_wait_count)
+{
+        struct qlcnic_hardware_context *ahw = adapter->ahw;
+        int temp;
+
+        netdev_info(adapter->netdev, "Recieved loopback IDC time extend event for 0x%x seconds\n",
+                    ahw->extend_lb_time);
+        temp = ahw->extend_lb_time * 1000;
+        *max_wait_count += temp / QLC_83XX_LB_MSLEEP_COUNT;
+        ahw->extend_lb_time = 0;
+}
+
 int qlcnic_83xx_set_lb_mode(struct qlcnic_adapter *adapter, u8 mode)
 {
         struct qlcnic_hardware_context *ahw = adapter->ahw;
         struct net_device *netdev = adapter->netdev;
+        u32 config, max_wait_count;
         int status = 0, loop = 0;
-        u32 config;
 
+        ahw->extend_lb_time = 0;
+        max_wait_count = QLC_83XX_LB_WAIT_COUNT;
         status = qlcnic_83xx_get_port_config(adapter);
         if (status)
                 return status;
@@ -1754,9 +1770,14 @@ int qlcnic_83xx_set_lb_mode(struct qlcnic_adapter *adapter, u8 mode)
                         clear_bit(QLC_83XX_IDC_COMP_AEN, &ahw->idc.status);
                         return -EBUSY;
                 }
-                if (loop++ > QLC_83XX_LB_WAIT_COUNT) {
-                        netdev_err(netdev,
-                                   "Did not receive IDC completion AEN\n");
+
+                if (ahw->extend_lb_time)
+                        qlcnic_extend_lb_idc_cmpltn_wait(adapter,
+                                                         &max_wait_count);
+
+                if (loop++ > max_wait_count) {
+                        netdev_err(netdev, "%s: Did not receive loopback IDC completion AEN\n",
+                                   __func__);
                         clear_bit(QLC_83XX_IDC_COMP_AEN, &ahw->idc.status);
                         qlcnic_83xx_clear_lb_mode(adapter, mode);
                         return -ETIMEDOUT;
@@ -1771,10 +1792,12 @@ int qlcnic_83xx_set_lb_mode(struct qlcnic_adapter *adapter, u8 mode)
 int qlcnic_83xx_clear_lb_mode(struct qlcnic_adapter *adapter, u8 mode)
 {
         struct qlcnic_hardware_context *ahw = adapter->ahw;
+        u32 config = ahw->port_config, max_wait_count;
         struct net_device *netdev = adapter->netdev;
         int status = 0, loop = 0;
-        u32 config = ahw->port_config;
 
+        ahw->extend_lb_time = 0;
+        max_wait_count = QLC_83XX_LB_WAIT_COUNT;
         set_bit(QLC_83XX_IDC_COMP_AEN, &ahw->idc.status);
         if (mode == QLCNIC_ILB_MODE)
                 ahw->port_config &= ~QLC_83XX_CFG_LOOPBACK_HSS;
@@ -1802,9 +1825,13 @@ int qlcnic_83xx_clear_lb_mode(struct qlcnic_adapter *adapter, u8 mode)
                         return -EBUSY;
                 }
 
-                if (loop++ > QLC_83XX_LB_WAIT_COUNT) {
-                        netdev_err(netdev,
-                                   "Did not receive IDC completion AEN\n");
+                if (ahw->extend_lb_time)
+                        qlcnic_extend_lb_idc_cmpltn_wait(adapter,
+                                                         &max_wait_count);
+
+                if (loop++ > max_wait_count) {
+                        netdev_err(netdev, "%s: Did not receive loopback IDC completion AEN\n",
+                                   __func__);
                         clear_bit(QLC_83XX_IDC_COMP_AEN, &ahw->idc.status);
                         return -ETIMEDOUT;
                 }