ixgbe:add support for a new 82599 10G Base-T device

This adds support for a new copper device for 82599, device id 0x151c.
This 82599 10GBase-T device uses the PHY's internal temperature sensor
to guard against over-temp conditions. In this scenario the PHY will be
put in a low power mode and link will no longer be able to transmit or
receive any data. When this occurs, the over-temp interrupt is latched
and driver logs this error message. A HW reset or power cycle is
required to clear this status.

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

7 files changed, 111 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index d0ea3d6dea95..ffae480587ae 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -360,6 +360,7 @@ struct ixgbe_adapter {
         u32 flags2;
 #define IXGBE_FLAG2_RSC_CAPABLE                 (u32)(1)
 #define IXGBE_FLAG2_RSC_ENABLED                 (u32)(1 << 1)
+#define IXGBE_FLAG2_TEMP_SENSOR_CAPABLE         (u32)(1 << 2)
 /* default to trying for four seconds */
 #define IXGBE_TRY_LINK_TIMEOUT (4 * HZ)
 
@@ -407,6 +408,8 @@ struct ixgbe_adapter {
         u16 eeprom_version;
 
         int node;
+        struct work_struct check_overtemp_task;
+        u32 interrupt_event;
 
         /* SR-IOV */
         DECLARE_BITMAP(active_vfs, IXGBE_MAX_VF_FUNCTIONS);
diff --git a/drivers/net/ixgbe/ixgbe_82598.c b/drivers/net/ixgbe/ixgbe_82598.c
index f2b7ff44215b..9c02d6014cc4 100644
--- a/drivers/net/ixgbe/ixgbe_82598.c
+++ b/drivers/net/ixgbe/ixgbe_82598.c
@@ -1236,6 +1236,7 @@ static struct ixgbe_phy_operations phy_ops_82598 = {
         .setup_link             = &ixgbe_setup_phy_link_generic,
         .setup_link_speed       = &ixgbe_setup_phy_link_speed_generic,
         .read_i2c_eeprom        = &ixgbe_read_i2c_eeprom_82598,
+        .check_overtemp   = &ixgbe_tn_check_overtemp,
 };
 
 struct ixgbe_info ixgbe_82598_info = {
diff --git a/drivers/net/ixgbe/ixgbe_82599.c b/drivers/net/ixgbe/ixgbe_82599.c
index e9706eb8e4ff..a4e2901f2f08 100644
--- a/drivers/net/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ixgbe/ixgbe_82599.c
@@ -2395,6 +2395,7 @@ static struct ixgbe_phy_operations phy_ops_82599 = {
         .write_i2c_byte         = &ixgbe_write_i2c_byte_generic,
         .read_i2c_eeprom        = &ixgbe_read_i2c_eeprom_generic,
         .write_i2c_eeprom       = &ixgbe_write_i2c_eeprom_generic,
+        .check_overtemp         = &ixgbe_tn_check_overtemp,
 };
 
 struct ixgbe_info ixgbe_82599_info = {
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 9551cbb7bf01..d571d101de08 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -108,6 +108,8 @@ static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
          board_82599 },
         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
          board_82599 },
+        {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM),
+         board_82599 },
         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
          board_82599 },
 
@@ -1618,6 +1620,48 @@ static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
         }
 }
 
+/**
+ * ixgbe_check_overtemp_task - worker thread to check over tempurature
+ * @work: pointer to work_struct containing our data
+ **/
+static void ixgbe_check_overtemp_task(struct work_struct *work)
+{
+        struct ixgbe_adapter *adapter = container_of(work,
+                                                     struct ixgbe_adapter,
+                                                     check_overtemp_task);
+        struct ixgbe_hw *hw = &adapter->hw;
+        u32 eicr = adapter->interrupt_event;
+
+        if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
+                switch (hw->device_id) {
+                case IXGBE_DEV_ID_82599_T3_LOM: {
+                        u32 autoneg;
+                        bool link_up = false;
+
+                        if (hw->mac.ops.check_link)
+                                hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
+
+                        if (((eicr & IXGBE_EICR_GPI_SDP0) && (!link_up)) ||
+                            (eicr & IXGBE_EICR_LSC))
+                                /* Check if this is due to overtemp */
+                                if (hw->phy.ops.check_overtemp(hw) == IXGBE_ERR_OVERTEMP)
+                                        break;
+                        }
+                        return;
+                default:
+                        if (!(eicr & IXGBE_EICR_GPI_SDP0))
+                                return;
+                        break;
+                }
+                DPRINTK(DRV, ERR, "Network adapter has been stopped because it "
+                        "has over heated. Restart the computer. If the problem "
+                        "persists, power off the system and replace the "
+                        "adapter\n");
+                /* write to clear the interrupt */
+                IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0);
+        }
+}
+
 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
 {
         struct ixgbe_hw *hw = &adapter->hw;
@@ -1689,6 +1733,10 @@ static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
 
         if (hw->mac.type == ixgbe_mac_82599EB) {
                 ixgbe_check_sfp_event(adapter, eicr);
+                adapter->interrupt_event = eicr;
+                if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
+                    ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
+                        schedule_work(&adapter->check_overtemp_task);
 
                 /* Handle Flow Director Full threshold interrupt */
                 if (eicr & IXGBE_EICR_FLOW_DIR) {
@@ -2190,6 +2238,8 @@ static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
         u32 mask;
 
         mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
+        if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
+                mask |= IXGBE_EIMS_GPI_SDP0;
         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
                 mask |= IXGBE_EIMS_GPI_SDP1;
         if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
@@ -2250,6 +2300,9 @@ static irqreturn_t ixgbe_intr(int irq, void *data)
                 ixgbe_check_sfp_event(adapter, eicr);
 
         ixgbe_check_fan_failure(adapter, eicr);
+        if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
+            ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
+                schedule_work(&adapter->check_overtemp_task);
 
         if (napi_schedule_prep(&(q_vector->napi))) {
                 adapter->tx_ring[0]->total_packets = 0;
@@ -3265,6 +3318,13 @@ static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
                 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
         }
 
+        /* Enable Thermal over heat sensor interrupt */
+        if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
+                gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
+                gpie |= IXGBE_SDP0_GPIEN;
+                IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
+        }
+
         /* Enable fan failure interrupt if media type is copper */
         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
                 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
@@ -3666,6 +3726,9 @@ void ixgbe_down(struct ixgbe_adapter *adapter)
             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
                 cancel_work_sync(&adapter->fdir_reinit_task);
 
+        if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
+                cancel_work_sync(&adapter->check_overtemp_task);
+
         /* disable transmits in the hardware now that interrupts are off */
         for (i = 0; i < adapter->num_tx_queues; i++) {
                 j = adapter->tx_ring[i]->reg_idx;
@@ -4645,6 +4708,8 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
                 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
                 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
                 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
+                if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
+                        adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
                 if (dev->features & NETIF_F_NTUPLE) {
                         /* Flow Director perfect filter enabled */
                         adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
@@ -6561,7 +6626,9 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
         }
 
         /* reset_hw fills in the perm_addr as well */
+        hw->phy.reset_if_overtemp = true;
         err = hw->mac.ops.reset_hw(hw);
+        hw->phy.reset_if_overtemp = false;
         if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
             hw->mac.type == ixgbe_mac_82598EB) {
                 /*
@@ -6730,6 +6797,8 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
                 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
 
+        if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
+                INIT_WORK(&adapter->check_overtemp_task, ixgbe_check_overtemp_task);
 #ifdef CONFIG_IXGBE_DCA
         if (dca_add_requester(&pdev->dev) == 0) {
                 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
diff --git a/drivers/net/ixgbe/ixgbe_phy.c b/drivers/net/ixgbe/ixgbe_phy.c
index 22d21af14783..09e1911ff510 100644
--- a/drivers/net/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ixgbe/ixgbe_phy.c
@@ -135,6 +135,11 @@ static enum ixgbe_phy_type ixgbe_get_phy_type_from_id(u32 phy_id)
  **/
 s32 ixgbe_reset_phy_generic(struct ixgbe_hw *hw)
 {
+        /* Don't reset PHY if it's shut down due to overtemp. */
+        if (!hw->phy.reset_if_overtemp &&
+            (IXGBE_ERR_OVERTEMP == hw->phy.ops.check_overtemp(hw)))
+                return 0;
+
         /*
          * Perform soft PHY reset to the PHY_XS.
          * This will cause a soft reset to the PHY
@@ -1345,3 +1350,28 @@ s32 ixgbe_get_phy_firmware_version_tnx(struct ixgbe_hw *hw,
         return status;
 }
 
+/**
+ *  ixgbe_tn_check_overtemp - Checks if an overtemp occured.
+ *  @hw: pointer to hardware structure
+ *
+ *  Checks if the LASI temp alarm status was triggered due to overtemp
+ **/
+s32 ixgbe_tn_check_overtemp(struct ixgbe_hw *hw)
+{
+        s32 status = 0;
+        u16 phy_data = 0;
+
+        if (hw->device_id != IXGBE_DEV_ID_82599_T3_LOM)
+                goto out;
+
+        /* Check that the LASI temp alarm status was triggered */
+        hw->phy.ops.read_reg(hw, IXGBE_TN_LASI_STATUS_REG,
+                             MDIO_MMD_PMAPMD, &phy_data);
+
+        if (!(phy_data & IXGBE_TN_LASI_STATUS_TEMP_ALARM))
+                goto out;
+
+        status = IXGBE_ERR_OVERTEMP;
+out:
+        return status;
+}
diff --git a/drivers/net/ixgbe/ixgbe_phy.h b/drivers/net/ixgbe/ixgbe_phy.h
index c9c545941407..ef4ba834c593 100644
--- a/drivers/net/ixgbe/ixgbe_phy.h
+++ b/drivers/net/ixgbe/ixgbe_phy.h
@@ -80,6 +80,8 @@
 #define IXGBE_I2C_T_SU_STO  4
 #define IXGBE_I2C_T_BUF     5
 
+#define IXGBE_TN_LASI_STATUS_REG        0x9005
+#define IXGBE_TN_LASI_STATUS_TEMP_ALARM 0x0008
 
 s32 ixgbe_init_phy_ops_generic(struct ixgbe_hw *hw);
 s32 ixgbe_identify_phy_generic(struct ixgbe_hw *hw);
@@ -106,6 +108,7 @@ s32 ixgbe_identify_sfp_module_generic(struct ixgbe_hw *hw);
 s32 ixgbe_get_sfp_init_sequence_offsets(struct ixgbe_hw *hw,
                                         u16 *list_offset,
                                         u16 *data_offset);
+s32 ixgbe_tn_check_overtemp(struct ixgbe_hw *hw);
 s32 ixgbe_read_i2c_byte_generic(struct ixgbe_hw *hw, u8 byte_offset,
                                 u8 dev_addr, u8 *data);
 s32 ixgbe_write_i2c_byte_generic(struct ixgbe_hw *hw, u8 byte_offset,
diff --git a/drivers/net/ixgbe/ixgbe_type.h b/drivers/net/ixgbe/ixgbe_type.h
index 39b9be897439..2eb6e151016c 100644
--- a/drivers/net/ixgbe/ixgbe_type.h
+++ b/drivers/net/ixgbe/ixgbe_type.h
@@ -51,6 +51,7 @@
 #define IXGBE_DEV_ID_82599_KX4           0x10F7
 #define IXGBE_DEV_ID_82599_KX4_MEZZ      0x1514
 #define IXGBE_DEV_ID_82599_KR            0x1517
+#define IXGBE_DEV_ID_82599_T3_LOM        0x151C
 #define IXGBE_DEV_ID_82599_CX4           0x10F9
 #define IXGBE_DEV_ID_82599_SFP           0x10FB
 #define IXGBE_DEV_ID_82599_SFP_EM        0x1507
@@ -2470,6 +2471,7 @@ struct ixgbe_phy_operations {
         s32 (*write_i2c_byte)(struct ixgbe_hw *, u8, u8, u8);
         s32 (*read_i2c_eeprom)(struct ixgbe_hw *, u8 , u8 *);
         s32 (*write_i2c_eeprom)(struct ixgbe_hw *, u8, u8);
+        s32 (*check_overtemp)(struct ixgbe_hw *);
 };
 
 struct ixgbe_eeprom_info {
@@ -2518,6 +2520,7 @@ struct ixgbe_phy_info {
         enum ixgbe_smart_speed          smart_speed;
         bool                            smart_speed_active;
         bool                            multispeed_fiber;
+        bool                            reset_if_overtemp;
 };
 
 #include "ixgbe_mbx.h"
@@ -2605,6 +2608,7 @@ struct ixgbe_info {
 #define IXGBE_ERR_FDIR_REINIT_FAILED            -23
 #define IXGBE_ERR_EEPROM_VERSION                -24
 #define IXGBE_ERR_NO_SPACE                      -25
+#define IXGBE_ERR_OVERTEMP                      -26
 #define IXGBE_NOT_IMPLEMENTED                   0x7FFFFFFF
 
 #endif /* _IXGBE_TYPE_H_ */