From 1ef903bf795be01c91c10c93a0f9d9d6f2f7921b Mon Sep 17 00:00:00 2001 From: Daniel Jurgens Date: Mon, 26 Mar 2018 13:35:29 -0500 Subject: net/mlx5: Free IRQs in shutdown path Some platforms require IRQs to be free'd in the shutdown path. Otherwise they will fail to be reallocated after a kexec. Fixes: 8812c24d28f4 ("net/mlx5: Add fast unload support in shutdown flow") Signed-off-by: Daniel Jurgens Signed-off-by: Saeed Mahameed --- drivers/net/ethernet/mellanox/mlx5/core/eq.c | 28 ++++++++++++++++++++++ drivers/net/ethernet/mellanox/mlx5/core/main.c | 8 +++++++ .../net/ethernet/mellanox/mlx5/core/mlx5_core.h | 2 ++ 3 files changed, 38 insertions(+) (limited to 'drivers') diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c index c1c94974e16b..1814f803bd2c 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c @@ -34,6 +34,9 @@ #include #include #include +#ifdef CONFIG_RFS_ACCEL +#include +#endif #include "mlx5_core.h" #include "fpga/core.h" #include "eswitch.h" @@ -923,3 +926,28 @@ int mlx5_core_eq_query(struct mlx5_core_dev *dev, struct mlx5_eq *eq, MLX5_SET(query_eq_in, in, eq_number, eq->eqn); return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen); } + +/* This function should only be called after mlx5_cmd_force_teardown_hca */ +void mlx5_core_eq_free_irqs(struct mlx5_core_dev *dev) +{ + struct mlx5_eq_table *table = &dev->priv.eq_table; + struct mlx5_eq *eq; + +#ifdef CONFIG_RFS_ACCEL + if (dev->rmap) { + free_irq_cpu_rmap(dev->rmap); + dev->rmap = NULL; + } +#endif + list_for_each_entry(eq, &table->comp_eqs_list, list) + free_irq(eq->irqn, eq); + + free_irq(table->pages_eq.irqn, &table->pages_eq); + free_irq(table->async_eq.irqn, &table->async_eq); + free_irq(table->cmd_eq.irqn, &table->cmd_eq); +#ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING + if (MLX5_CAP_GEN(dev, pg)) + free_irq(table->pfault_eq.irqn, &table->pfault_eq); +#endif + pci_free_irq_vectors(dev->pdev); +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c index 63a8ea31601c..e2c465b0b3f8 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c @@ -1587,6 +1587,14 @@ static int mlx5_try_fast_unload(struct mlx5_core_dev *dev) mlx5_enter_error_state(dev, true); + /* Some platforms requiring freeing the IRQ's in the shutdown + * flow. If they aren't freed they can't be allocated after + * kexec. There is no need to cleanup the mlx5_core software + * contexts. + */ + mlx5_irq_clear_affinity_hints(dev); + mlx5_core_eq_free_irqs(dev); + return 0; } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h index 7d001fe6e631..023882d9a22e 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h @@ -128,6 +128,8 @@ int mlx5_core_eq_query(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u32 *out, int outlen); int mlx5_start_eqs(struct mlx5_core_dev *dev); void mlx5_stop_eqs(struct mlx5_core_dev *dev); +/* This function should only be called after mlx5_cmd_force_teardown_hca */ +void mlx5_core_eq_free_irqs(struct mlx5_core_dev *dev); struct mlx5_eq *mlx5_eqn2eq(struct mlx5_core_dev *dev, int eqn); u32 mlx5_eq_poll_irq_disabled(struct mlx5_eq *eq); void mlx5_cq_tasklet_cb(unsigned long data); -- cgit 1.4.1