mlx4_core: Report thermal error events

Print an error message when a thermal error async event is reported by the HW.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Dotan Barak <dotanb@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

2 files changed, 35 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/eq.c b/drivers/net/ethernet/mellanox/mlx4/eq.c
index 8fa41f3082cf..780b5adf8e7d 100644
--- a/drivers/net/ethernet/mellanox/mlx4/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/eq.c
@@ -79,7 +79,8 @@ enum {
                                (1ull << MLX4_EVENT_TYPE_SRQ_LIMIT)          | \
                                (1ull << MLX4_EVENT_TYPE_CMD)                | \
                                (1ull << MLX4_EVENT_TYPE_COMM_CHANNEL)       | \
-                               (1ull << MLX4_EVENT_TYPE_FLR_EVENT))
+                               (1ull << MLX4_EVENT_TYPE_FLR_EVENT)          | \
+                               (1ull << MLX4_EVENT_TYPE_FATAL_WARNING))
 
 static void eq_set_ci(struct mlx4_eq *eq, int req_not)
 {
@@ -443,6 +444,35 @@ static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
                         queue_work(priv->mfunc.master.comm_wq,
                                    &priv->mfunc.master.slave_flr_event_work);
                         break;
+
+                case MLX4_EVENT_TYPE_FATAL_WARNING:
+                        if (eqe->subtype == MLX4_FATAL_WARNING_SUBTYPE_WARMING) {
+                                if (mlx4_is_master(dev))
+                                        for (i = 0; i < dev->num_slaves; i++) {
+                                                mlx4_dbg(dev, "%s: Sending "
+                                                        "MLX4_FATAL_WARNING_SUBTYPE_WARMING"
+                                                        " to slave: %d\n", __func__, i);
+                                                if (i == dev->caps.function)
+                                                        continue;
+                                                mlx4_slave_event(dev, i, eqe);
+                                        }
+                                mlx4_err(dev, "Temperature Threshold was reached! "
+                                        "Threshold: %d celsius degrees; "
+                                        "Current Temperature: %d\n",
+                                        be16_to_cpu(eqe->event.warming.warning_threshold),
+                                        be16_to_cpu(eqe->event.warming.current_temperature));
+                        } else
+                                mlx4_warn(dev, "Unhandled event FATAL WARNING (%02x), "
+                                          "subtype %02x on EQ %d at index %u. owner=%x, "
+                                          "nent=0x%x, slave=%x, ownership=%s\n",
+                                          eqe->type, eqe->subtype, eq->eqn,
+                                          eq->cons_index, eqe->owner, eq->nent,
+                                          eqe->slave_id,
+                                          !!(eqe->owner & 0x80) ^
+                                          !!(eq->cons_index & eq->nent) ? "HW" : "SW");
+
+                        break;
+
                 case MLX4_EVENT_TYPE_EEC_CATAS_ERROR:
                 case MLX4_EVENT_TYPE_ECC_DETECT:
                 default:
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index c92269f8c057..ac2d6061268d 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -363,6 +363,10 @@ struct mlx4_eqe {
                 struct {
                         __be32  slave_id;
                 } __packed flr_event;
+                struct {
+                        __be16  current_temperature;
+                        __be16  warning_threshold;
+                } __packed warming;
         }                       event;
         u8                      slave_id;
         u8                      reserved3[2];