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Message-ID: <1496958410-4220-15-git-send-email-netanel@amazon.com>
Date: Fri, 9 Jun 2017 00:46:41 +0300
From: <netanel@...zon.com>
To: <davem@...emloft.net>, <netdev@...r.kernel.org>
CC: Netanel Belgazal <netanel@...zon.com>, <dwmw@...zon.com>,
<zorik@...zon.com>, <matua@...zon.com>, <saeedb@...zon.com>,
<msw@...zon.com>, <aliguori@...zon.com>, <nafea@...zon.com>,
<evgenys@...zon.com>
Subject: [PATCH net-next 04/13] net: ena: add reset reason for each device FLR
From: Netanel Belgazal <netanel@...zon.com>
For each device reset, log to the device what is the cause
the reset occur.
Signed-off-by: Netanel Belgazal <netanel@...zon.com>
---
drivers/net/ethernet/amazon/ena/ena_com.c | 5 +++-
drivers/net/ethernet/amazon/ena/ena_com.h | 4 +++-
drivers/net/ethernet/amazon/ena/ena_netdev.c | 17 +++++++++----
drivers/net/ethernet/amazon/ena/ena_netdev.h | 2 ++
drivers/net/ethernet/amazon/ena/ena_regs_defs.h | 32 +++++++++++++++++++++++++
5 files changed, 54 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index 2721c70..f6e1d30 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -1825,7 +1825,8 @@ void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data)
writel((u32)aenq->head, dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
}
-int ena_com_dev_reset(struct ena_com_dev *ena_dev)
+int ena_com_dev_reset(struct ena_com_dev *ena_dev,
+ enum ena_regs_reset_reason_types reset_reason)
{
u32 stat, timeout, cap, reset_val;
int rc;
@@ -1853,6 +1854,8 @@ int ena_com_dev_reset(struct ena_com_dev *ena_dev)
/* start reset */
reset_val = ENA_REGS_DEV_CTL_DEV_RESET_MASK;
+ reset_val |= (reset_reason << ENA_REGS_DEV_CTL_RESET_REASON_SHIFT) &
+ ENA_REGS_DEV_CTL_RESET_REASON_MASK;
writel(reset_val, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
/* Write again the MMIO read request address */
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h
index 630c09a..7b784f8 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -420,10 +420,12 @@ void ena_com_admin_destroy(struct ena_com_dev *ena_dev);
/* ena_com_dev_reset - Perform device FLR to the device.
* @ena_dev: ENA communication layer struct
+ * @reset_reason: Specify what is the trigger for the reset in case of an error.
*
* @return - 0 on success, negative value on failure.
*/
-int ena_com_dev_reset(struct ena_com_dev *ena_dev);
+int ena_com_dev_reset(struct ena_com_dev *ena_dev,
+ enum ena_regs_reset_reason_types reset_reason);
/* ena_com_create_io_queue - Create io queue.
* @ena_dev: ENA communication layer struct
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 1ee06e1..0d35a4cc 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -87,6 +87,7 @@ static void ena_tx_timeout(struct net_device *dev)
if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
return;
+ adapter->reset_reason = ENA_REGS_RESET_OS_NETDEV_WD;
u64_stats_update_begin(&adapter->syncp);
adapter->dev_stats.tx_timeout++;
u64_stats_update_end(&adapter->syncp);
@@ -670,6 +671,7 @@ static int validate_tx_req_id(struct ena_ring *tx_ring, u16 req_id)
u64_stats_update_end(&tx_ring->syncp);
/* Trigger device reset */
+ tx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_TX_REQ_ID;
set_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags);
return -EFAULT;
}
@@ -1055,6 +1057,7 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
u64_stats_update_end(&rx_ring->syncp);
/* Too many desc from the device. Trigger reset */
+ adapter->reset_reason = ENA_REGS_RESET_TOO_MANY_RX_DESCS;
set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
return 0;
@@ -1720,7 +1723,7 @@ static void ena_down(struct ena_adapter *adapter)
if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags)) {
int rc;
- rc = ena_com_dev_reset(adapter->ena_dev);
+ rc = ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
if (rc)
dev_err(&adapter->pdev->dev, "Device reset failed\n");
}
@@ -2353,7 +2356,7 @@ static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
readless_supported = !(pdev->revision & ENA_MMIO_DISABLE_REG_READ);
ena_com_set_mmio_read_mode(ena_dev, readless_supported);
- rc = ena_com_dev_reset(ena_dev);
+ rc = ena_com_dev_reset(ena_dev, ENA_REGS_RESET_NORMAL);
if (rc) {
dev_err(dev, "Can not reset device\n");
goto err_mmio_read_less;
@@ -2512,6 +2515,7 @@ static void ena_fw_reset_device(struct work_struct *work)
ena_com_mmio_reg_read_request_destroy(ena_dev);
+ adapter->reset_reason = ENA_REGS_RESET_NORMAL;
clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
/* Finish with the destroy part. Start the init part */
@@ -2591,6 +2595,8 @@ static int check_missing_comp_in_queue(struct ena_adapter *adapter,
"The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
missed_tx,
adapter->missing_tx_completion_threshold);
+ adapter->reset_reason =
+ ENA_REGS_RESET_MISS_TX_CMPL;
set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
return -EIO;
}
@@ -2705,6 +2711,7 @@ static void check_for_missing_keep_alive(struct ena_adapter *adapter)
u64_stats_update_begin(&adapter->syncp);
adapter->dev_stats.wd_expired++;
u64_stats_update_end(&adapter->syncp);
+ adapter->reset_reason = ENA_REGS_RESET_KEEP_ALIVE_TO;
set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
}
}
@@ -2717,6 +2724,7 @@ static void check_for_admin_com_state(struct ena_adapter *adapter)
u64_stats_update_begin(&adapter->syncp);
adapter->dev_stats.admin_q_pause++;
u64_stats_update_end(&adapter->syncp);
+ adapter->reset_reason = ENA_REGS_RESET_ADMIN_TO;
set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
}
}
@@ -3121,6 +3129,7 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ena_set_conf_feat_params(adapter, &get_feat_ctx);
adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
+ adapter->reset_reason = ENA_REGS_RESET_NORMAL;
adapter->tx_ring_size = queue_size;
adapter->rx_ring_size = queue_size;
@@ -3205,7 +3214,7 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ena_com_delete_debug_area(ena_dev);
ena_com_rss_destroy(ena_dev);
err_free_msix:
- ena_com_dev_reset(ena_dev);
+ ena_com_dev_reset(ena_dev, ENA_REGS_RESET_INIT_ERR);
ena_free_mgmnt_irq(adapter);
pci_free_irq_vectors(adapter->pdev);
err_worker_destroy:
@@ -3288,7 +3297,7 @@ static void ena_remove(struct pci_dev *pdev)
/* Reset the device only if the device is running. */
if (test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
- ena_com_dev_reset(ena_dev);
+ ena_com_dev_reset(ena_dev, adapter->reset_reason);
ena_free_mgmnt_irq(adapter);
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 56637be..bbae971 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -327,6 +327,8 @@ struct ena_adapter {
/* last queue index that was checked for uncompleted tx packets */
u32 last_monitored_tx_qid;
+
+ enum ena_regs_reset_reason_types reset_reason;
};
void ena_set_ethtool_ops(struct net_device *netdev);
diff --git a/drivers/net/ethernet/amazon/ena/ena_regs_defs.h b/drivers/net/ethernet/amazon/ena/ena_regs_defs.h
index c3891c5..9aec43c 100644
--- a/drivers/net/ethernet/amazon/ena/ena_regs_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_regs_defs.h
@@ -32,6 +32,36 @@
#ifndef _ENA_REGS_H_
#define _ENA_REGS_H_
+enum ena_regs_reset_reason_types {
+ ENA_REGS_RESET_NORMAL = 0,
+
+ ENA_REGS_RESET_KEEP_ALIVE_TO = 1,
+
+ ENA_REGS_RESET_ADMIN_TO = 2,
+
+ ENA_REGS_RESET_MISS_TX_CMPL = 3,
+
+ ENA_REGS_RESET_INV_RX_REQ_ID = 4,
+
+ ENA_REGS_RESET_INV_TX_REQ_ID = 5,
+
+ ENA_REGS_RESET_TOO_MANY_RX_DESCS = 6,
+
+ ENA_REGS_RESET_INIT_ERR = 7,
+
+ ENA_REGS_RESET_DRIVER_INVALID_STATE = 8,
+
+ ENA_REGS_RESET_OS_TRIGGER = 9,
+
+ ENA_REGS_RESET_OS_NETDEV_WD = 10,
+
+ ENA_REGS_RESET_SHUTDOWN = 11,
+
+ ENA_REGS_RESET_USER_TRIGGER = 12,
+
+ ENA_REGS_RESET_GENERIC = 13,
+};
+
/* ena_registers offsets */
#define ENA_REGS_VERSION_OFF 0x0
#define ENA_REGS_CONTROLLER_VERSION_OFF 0x4
@@ -104,6 +134,8 @@
#define ENA_REGS_DEV_CTL_QUIESCENT_MASK 0x4
#define ENA_REGS_DEV_CTL_IO_RESUME_SHIFT 3
#define ENA_REGS_DEV_CTL_IO_RESUME_MASK 0x8
+#define ENA_REGS_DEV_CTL_RESET_REASON_SHIFT 28
+#define ENA_REGS_DEV_CTL_RESET_REASON_MASK 0xf0000000
/* dev_sts register */
#define ENA_REGS_DEV_STS_READY_MASK 0x1
--
2.7.4
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