diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/catas.c | 11 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/cmd.c | 163 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/mcg.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/mlx4.h | 2 |
4 files changed, 152 insertions, 27 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/catas.c b/drivers/net/ethernet/mellanox/mlx4/catas.c index 588d6b5e1211..63f14ffcc906 100644 --- a/drivers/net/ethernet/mellanox/mlx4/catas.c +++ b/drivers/net/ethernet/mellanox/mlx4/catas.c @@ -42,8 +42,8 @@ enum { -static int internal_err_reset = 1; -module_param(internal_err_reset, int, 0644); +int mlx4_internal_err_reset = 1; +module_param_named(internal_err_reset, mlx4_internal_err_reset, int, 0644); MODULE_PARM_DESC(internal_err_reset, "Reset device on internal errors if non-zero" " (default 1, in SRIOV mode default is 0)"); @@ -92,7 +92,7 @@ void mlx4_enter_error_state(struct mlx4_dev_persistent *persist) int err; struct mlx4_dev *dev; - if (!internal_err_reset) + if (!mlx4_internal_err_reset) return; mutex_lock(&persist->device_state_mutex); @@ -110,6 +110,7 @@ void mlx4_enter_error_state(struct mlx4_dev_persistent *persist) /* At that step HW was already reset, now notify clients */ mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0); + mlx4_cmd_wake_completions(dev); return; out: @@ -157,7 +158,7 @@ static void poll_catas(unsigned long dev_ptr) return; internal_err: - if (internal_err_reset) + if (mlx4_internal_err_reset) queue_work(dev->persist->catas_wq, &dev->persist->catas_work); } @@ -177,7 +178,7 @@ void mlx4_start_catas_poll(struct mlx4_dev *dev) /*If we are in SRIOV the default of the module param must be 0*/ if (mlx4_is_mfunc(dev)) - internal_err_reset = 0; + mlx4_internal_err_reset = 0; INIT_LIST_HEAD(&priv->catas_err.list); init_timer(&priv->catas_err.timer); diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c index 7cd90e6a4272..3895b2b5fc92 100644 --- a/drivers/net/ethernet/mellanox/mlx4/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c @@ -182,6 +182,72 @@ static u8 mlx4_errno_to_status(int errno) } } +static int mlx4_internal_err_ret_value(struct mlx4_dev *dev, u16 op, + u8 op_modifier) +{ + switch (op) { + case MLX4_CMD_UNMAP_ICM: + case MLX4_CMD_UNMAP_ICM_AUX: + case MLX4_CMD_UNMAP_FA: + case MLX4_CMD_2RST_QP: + case MLX4_CMD_HW2SW_EQ: + case MLX4_CMD_HW2SW_CQ: + case MLX4_CMD_HW2SW_SRQ: + case MLX4_CMD_HW2SW_MPT: + case MLX4_CMD_CLOSE_HCA: + case MLX4_QP_FLOW_STEERING_DETACH: + case MLX4_CMD_FREE_RES: + case MLX4_CMD_CLOSE_PORT: + return CMD_STAT_OK; + + case MLX4_CMD_QP_ATTACH: + /* On Detach case return success */ + if (op_modifier == 0) + return CMD_STAT_OK; + return mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR); + + default: + return mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR); + } +} + +static int mlx4_closing_cmd_fatal_error(u16 op, u8 fw_status) +{ + /* Any error during the closing commands below is considered fatal */ + if (op == MLX4_CMD_CLOSE_HCA || + op == MLX4_CMD_HW2SW_EQ || + op == MLX4_CMD_HW2SW_CQ || + op == MLX4_CMD_2RST_QP || + op == MLX4_CMD_HW2SW_SRQ || + op == MLX4_CMD_SYNC_TPT || + op == MLX4_CMD_UNMAP_ICM || + op == MLX4_CMD_UNMAP_ICM_AUX || + op == MLX4_CMD_UNMAP_FA) + return 1; + /* Error on MLX4_CMD_HW2SW_MPT is fatal except when fw status equals + * CMD_STAT_REG_BOUND. + * This status indicates that memory region has memory windows bound to it + * which may result from invalid user space usage and is not fatal. + */ + if (op == MLX4_CMD_HW2SW_MPT && fw_status != CMD_STAT_REG_BOUND) + return 1; + return 0; +} + +static int mlx4_cmd_reset_flow(struct mlx4_dev *dev, u16 op, u8 op_modifier, + int err) +{ + /* Only if reset flow is really active return code is based on + * command, otherwise current error code is returned. + */ + if (mlx4_internal_err_reset) { + mlx4_enter_error_state(dev->persist); + err = mlx4_internal_err_ret_value(dev, op, op_modifier); + } + + return err; +} + static int comm_pending(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); @@ -258,7 +324,7 @@ static int mlx4_comm_cmd_wait(struct mlx4_dev *dev, u8 op, cmd->free_head = context->next; spin_unlock(&cmd->context_lock); - init_completion(&context->done); + reinit_completion(&context->done); mlx4_comm_cmd_post(dev, op, param); @@ -323,17 +389,21 @@ static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param, { struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd; u32 __iomem *hcr = cmd->hcr; - int ret = -EAGAIN; + int ret = -EIO; unsigned long end; - mutex_lock(&cmd->hcr_mutex); - - if (pci_channel_offline(dev->persist->pdev)) { + mutex_lock(&dev->persist->device_state_mutex); + /* To avoid writing to unknown addresses after the device state was + * changed to internal error and the chip was reset, + * check the INTERNAL_ERROR flag which is updated under + * device_state_mutex lock. + */ + if (pci_channel_offline(dev->persist->pdev) || + (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)) { /* * Device is going through error recovery * and cannot accept commands. */ - ret = -EIO; goto out; } @@ -347,7 +417,6 @@ static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param, * Device is going through error recovery * and cannot accept commands. */ - ret = -EIO; goto out; } @@ -391,7 +460,11 @@ static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param, ret = 0; out: - mutex_unlock(&cmd->hcr_mutex); + if (ret) + mlx4_warn(dev, "Could not post command 0x%x: ret=%d, in_param=0x%llx, in_mod=0x%x, op_mod=0x%x\n", + op, ret, in_param, in_modifier, op_modifier); + mutex_unlock(&dev->persist->device_state_mutex); + return ret; } @@ -464,12 +537,12 @@ static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param, down(&priv->cmd.poll_sem); - if (pci_channel_offline(dev->persist->pdev)) { + if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) { /* * Device is going through error recovery * and cannot accept commands. */ - err = -EIO; + err = mlx4_internal_err_ret_value(dev, op, op_modifier); goto out; } @@ -483,7 +556,7 @@ static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param, err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0, in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0); if (err) - goto out; + goto out_reset; end = msecs_to_jiffies(timeout) + jiffies; while (cmd_pending(dev) && time_before(jiffies, end)) { @@ -493,6 +566,11 @@ static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param, * and cannot accept commands. */ err = -EIO; + goto out_reset; + } + + if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) { + err = mlx4_internal_err_ret_value(dev, op, op_modifier); goto out; } @@ -502,8 +580,8 @@ static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param, if (cmd_pending(dev)) { mlx4_warn(dev, "command 0x%x timed out (go bit not cleared)\n", op); - err = -ETIMEDOUT; - goto out; + err = -EIO; + goto out_reset; } if (out_is_imm) @@ -515,10 +593,17 @@ static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param, stat = be32_to_cpu((__force __be32) __raw_readl(hcr + HCR_STATUS_OFFSET)) >> 24; err = mlx4_status_to_errno(stat); - if (err) + if (err) { mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n", op, stat); + if (mlx4_closing_cmd_fatal_error(op, stat)) + goto out_reset; + goto out; + } +out_reset: + if (err) + err = mlx4_cmd_reset_flow(dev, op, op_modifier, err); out: up(&priv->cmd.poll_sem); return err; @@ -565,17 +650,19 @@ static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param, goto out; } - init_completion(&context->done); + reinit_completion(&context->done); - mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0, - in_modifier, op_modifier, op, context->token, 1); + err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0, + in_modifier, op_modifier, op, context->token, 1); + if (err) + goto out_reset; if (!wait_for_completion_timeout(&context->done, msecs_to_jiffies(timeout))) { mlx4_warn(dev, "command 0x%x timed out (go bit not cleared)\n", op); - err = -EBUSY; - goto out; + err = -EIO; + goto out_reset; } err = context->result; @@ -592,12 +679,20 @@ static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param, else mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n", op, context->fw_status); + if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) + err = mlx4_internal_err_ret_value(dev, op, op_modifier); + else if (mlx4_closing_cmd_fatal_error(op, context->fw_status)) + goto out_reset; + goto out; } if (out_is_imm) *out_param = context->out_param; +out_reset: + if (err) + err = mlx4_cmd_reset_flow(dev, op, op_modifier, err); out: spin_lock(&cmd->context_lock); context->next = cmd->free_head; @@ -613,9 +708,12 @@ int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param, u16 op, unsigned long timeout, int native) { if (pci_channel_offline(dev->persist->pdev)) - return -EIO; + return mlx4_cmd_reset_flow(dev, op, op_modifier, -EIO); if (!mlx4_is_mfunc(dev) || (native && mlx4_is_master(dev))) { + if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) + return mlx4_internal_err_ret_value(dev, op, + op_modifier); if (mlx4_priv(dev)->cmd.use_events) return mlx4_cmd_wait(dev, in_param, out_param, out_is_imm, in_modifier, @@ -2121,7 +2219,6 @@ int mlx4_cmd_init(struct mlx4_dev *dev) int flags = 0; if (!priv->cmd.initialized) { - mutex_init(&priv->cmd.hcr_mutex); mutex_init(&priv->cmd.slave_cmd_mutex); sema_init(&priv->cmd.poll_sem, 1); priv->cmd.use_events = 0; @@ -2232,6 +2329,11 @@ int mlx4_cmd_use_events(struct mlx4_dev *dev) for (i = 0; i < priv->cmd.max_cmds; ++i) { priv->cmd.context[i].token = i; priv->cmd.context[i].next = i + 1; + /* To support fatal error flow, initialize all + * cmd contexts to allow simulating completions + * with complete() at any time. + */ + init_completion(&priv->cmd.context[i].done); } priv->cmd.context[priv->cmd.max_cmds - 1].next = -1; @@ -2329,6 +2431,25 @@ int mlx4_get_vf_indx(struct mlx4_dev *dev, int slave) return slave - 1; } +void mlx4_cmd_wake_completions(struct mlx4_dev *dev) +{ + struct mlx4_priv *priv = mlx4_priv(dev); + struct mlx4_cmd_context *context; + int i; + + spin_lock(&priv->cmd.context_lock); + if (priv->cmd.context) { + for (i = 0; i < priv->cmd.max_cmds; ++i) { + context = &priv->cmd.context[i]; + context->fw_status = CMD_STAT_INTERNAL_ERR; + context->result = + mlx4_status_to_errno(CMD_STAT_INTERNAL_ERR); + complete(&context->done); + } + } + spin_unlock(&priv->cmd.context_lock); +} + struct mlx4_active_ports mlx4_get_active_ports(struct mlx4_dev *dev, int slave) { struct mlx4_active_ports actv_ports; diff --git a/drivers/net/ethernet/mellanox/mlx4/mcg.c b/drivers/net/ethernet/mellanox/mlx4/mcg.c index a3867e7ef885..d22d9283d2cd 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mcg.c +++ b/drivers/net/ethernet/mellanox/mlx4/mcg.c @@ -1318,6 +1318,9 @@ out: mutex_unlock(&priv->mcg_table.mutex); mlx4_free_cmd_mailbox(dev, mailbox); + if (err && dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) + /* In case device is under an error, return success as a closing command */ + err = 0; return err; } diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h index aa1ecbc5a606..5c772ea4473b 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h @@ -235,6 +235,7 @@ do { \ extern int mlx4_log_num_mgm_entry_size; extern int log_mtts_per_seg; +extern int mlx4_internal_err_reset; #define MLX4_MAX_NUM_SLAVES (MLX4_MAX_NUM_PF + MLX4_MAX_NUM_VF) #define ALL_SLAVES 0xff @@ -607,7 +608,6 @@ struct mlx4_mgm { struct mlx4_cmd { struct pci_pool *pool; void __iomem *hcr; - struct mutex hcr_mutex; struct mutex slave_cmd_mutex; struct semaphore poll_sem; struct semaphore event_sem; |