net/mlx5: Read timeout values from DTOR

Replace hard coded timeouts with values stored by firmware in default
timeouts register (DTOR). Timeouts are read during driver load. If DTOR
is not supported by firmware then fallback to hard coded defaults
instead.

Signed-off-by: Amir Tzin <amirtz@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

2 files changed, 80 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/tout.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/tout.c
index ee266e0d122a..0dd96a6b140d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/tout.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/tout.c
@@ -13,7 +13,17 @@ static const u32 tout_def_sw_val[MAX_TIMEOUT_TYPES] = {
 	[MLX5_TO_FW_PRE_INIT_WARN_MESSAGE_INTERVAL_MS] = 20000,
 	[MLX5_TO_FW_PRE_INIT_WAIT_MS] = 2,
 	[MLX5_TO_FW_INIT_MS] = 2000,
-	[MLX5_TO_CMD_MS] = 60000
+	[MLX5_TO_CMD_MS] = 60000,
+	[MLX5_TO_PCI_TOGGLE_MS] =  2000,
+	[MLX5_TO_HEALTH_POLL_INTERVAL_MS] =  2000,
+	[MLX5_TO_FULL_CRDUMP_MS] = 60000,
+	[MLX5_TO_FW_RESET_MS] = 60000,
+	[MLX5_TO_FLUSH_ON_ERROR_MS] = 2000,
+	[MLX5_TO_PCI_SYNC_UPDATE_MS] = 5000,
+	[MLX5_TO_TEARDOWN_MS] = 3000,
+	[MLX5_TO_FSM_REACTIVATE_MS] = 5000,
+	[MLX5_TO_RECLAIM_PAGES_MS] = 5000,
+	[MLX5_TO_RECLAIM_VFS_PAGES_MS] = 120000
 };
 
 static void tout_set(struct mlx5_core_dev *dev, u64 val, enum mlx5_timeouts_types type)
@@ -94,3 +104,59 @@ u64 _mlx5_tout_ms(struct mlx5_core_dev *dev, enum mlx5_timeouts_types type)
 {
 	return dev->timeouts->to[type];
 }
+
+#define MLX5_TIMEOUT_QUERY(fld, reg_out) \
+	({ \
+	struct mlx5_ifc_default_timeout_bits *time_field; \
+	u32 to_multi, to_value; \
+	u64 to_val_ms; \
+	\
+	time_field = MLX5_ADDR_OF(dtor_reg, reg_out, fld); \
+	to_multi = MLX5_GET(default_timeout, time_field, to_multiplier); \
+	to_value = MLX5_GET(default_timeout, time_field, to_value); \
+	to_val_ms = tout_convert_reg_field_to_ms(to_multi, to_value); \
+	to_val_ms; \
+	})
+
+#define MLX5_TIMEOUT_FILL(fld, reg_out, dev, to_type, to_extra) \
+	({ \
+	u64 fw_to = MLX5_TIMEOUT_QUERY(fld, reg_out); \
+	tout_set(dev, fw_to + (to_extra), to_type); \
+	fw_to; \
+	})
+
+static int tout_query_dtor(struct mlx5_core_dev *dev)
+{
+	u64 pcie_toggle_to_val, tear_down_to_val;
+	u32 out[MLX5_ST_SZ_DW(dtor_reg)] = {};
+	u32 in[MLX5_ST_SZ_DW(dtor_reg)] = {};
+	int err;
+
+	err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), MLX5_REG_DTOR, 0, 0);
+	if (err)
+		return err;
+
+	pcie_toggle_to_val = MLX5_TIMEOUT_FILL(pcie_toggle_to, out, dev, MLX5_TO_PCI_TOGGLE_MS, 0);
+	MLX5_TIMEOUT_FILL(fw_reset_to, out, dev, MLX5_TO_FW_RESET_MS, pcie_toggle_to_val);
+
+	tear_down_to_val = MLX5_TIMEOUT_FILL(tear_down_to, out, dev, MLX5_TO_TEARDOWN_MS, 0);
+	MLX5_TIMEOUT_FILL(pci_sync_update_to, out, dev, MLX5_TO_PCI_SYNC_UPDATE_MS,
+			  tear_down_to_val);
+
+	MLX5_TIMEOUT_FILL(health_poll_to, out, dev, MLX5_TO_HEALTH_POLL_INTERVAL_MS, 0);
+	MLX5_TIMEOUT_FILL(full_crdump_to, out, dev, MLX5_TO_FULL_CRDUMP_MS, 0);
+	MLX5_TIMEOUT_FILL(flush_on_err_to, out, dev, MLX5_TO_FLUSH_ON_ERROR_MS, 0);
+	MLX5_TIMEOUT_FILL(fsm_reactivate_to, out, dev, MLX5_TO_FSM_REACTIVATE_MS, 0);
+	MLX5_TIMEOUT_FILL(reclaim_pages_to, out, dev, MLX5_TO_RECLAIM_PAGES_MS, 0);
+	MLX5_TIMEOUT_FILL(reclaim_vfs_pages_to, out, dev, MLX5_TO_RECLAIM_VFS_PAGES_MS, 0);
+
+	return 0;
+}
+
+int mlx5_tout_query_dtor(struct mlx5_core_dev *dev)
+{
+	if (tout_is_supported(dev))
+		return tout_query_dtor(dev);
+
+	return 0;
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/tout.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/tout.h
index 7e6fc61c5b45..31faa5c17aa9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/tout.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/tout.h
@@ -14,6 +14,18 @@ enum mlx5_timeouts_types {
 	MLX5_TO_FW_INIT_MS,
 	MLX5_TO_CMD_MS,
 
+	/* DTOR timeouts */
+	MLX5_TO_PCI_TOGGLE_MS,
+	MLX5_TO_HEALTH_POLL_INTERVAL_MS,
+	MLX5_TO_FULL_CRDUMP_MS,
+	MLX5_TO_FW_RESET_MS,
+	MLX5_TO_FLUSH_ON_ERROR_MS,
+	MLX5_TO_PCI_SYNC_UPDATE_MS,
+	MLX5_TO_TEARDOWN_MS,
+	MLX5_TO_FSM_REACTIVATE_MS,
+	MLX5_TO_RECLAIM_PAGES_MS,
+	MLX5_TO_RECLAIM_VFS_PAGES_MS,
+
 	MAX_TIMEOUT_TYPES
 };
 
@@ -21,6 +33,7 @@ struct mlx5_core_dev;
 int mlx5_tout_init(struct mlx5_core_dev *dev);
 void mlx5_tout_cleanup(struct mlx5_core_dev *dev);
 void mlx5_tout_query_iseg(struct mlx5_core_dev *dev);
+int mlx5_tout_query_dtor(struct mlx5_core_dev *dev);
 u64 _mlx5_tout_ms(struct mlx5_core_dev *dev, enum mlx5_timeouts_types type);
 
 #define mlx5_tout_ms(dev, type) _mlx5_tout_ms(dev, MLX5_TO_##type##_MS)