1 files changed, 109 insertions, 18 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index a9856a8bf8ad..9a16931ce39d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -57,36 +57,36 @@
 /* Module parameters */
 #define TX_TIMEO	5000
 static int watchdog = TX_TIMEO;
-module_param(watchdog, int, S_IRUGO | S_IWUSR);
+module_param(watchdog, int, 0644);
 MODULE_PARM_DESC(watchdog, "Transmit timeout in milliseconds (default 5s)");
 
 static int debug = -1;
-module_param(debug, int, S_IRUGO | S_IWUSR);
+module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)");
 
 static int phyaddr = -1;
-module_param(phyaddr, int, S_IRUGO);
+module_param(phyaddr, int, 0444);
 MODULE_PARM_DESC(phyaddr, "Physical device address");
 
 #define STMMAC_TX_THRESH	(DMA_TX_SIZE / 4)
 #define STMMAC_RX_THRESH	(DMA_RX_SIZE / 4)
 
 static int flow_ctrl = FLOW_OFF;
-module_param(flow_ctrl, int, S_IRUGO | S_IWUSR);
+module_param(flow_ctrl, int, 0644);
 MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]");
 
 static int pause = PAUSE_TIME;
-module_param(pause, int, S_IRUGO | S_IWUSR);
+module_param(pause, int, 0644);
 MODULE_PARM_DESC(pause, "Flow Control Pause Time");
 
 #define TC_DEFAULT 64
 static int tc = TC_DEFAULT;
-module_param(tc, int, S_IRUGO | S_IWUSR);
+module_param(tc, int, 0644);
 MODULE_PARM_DESC(tc, "DMA threshold control value");
 
 #define	DEFAULT_BUFSIZE	1536
 static int buf_sz = DEFAULT_BUFSIZE;
-module_param(buf_sz, int, S_IRUGO | S_IWUSR);
+module_param(buf_sz, int, 0644);
 MODULE_PARM_DESC(buf_sz, "DMA buffer size");
 
 #define	STMMAC_RX_COPYBREAK	256
@@ -97,7 +97,7 @@ static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
 
 #define STMMAC_DEFAULT_LPI_TIMER	1000
 static int eee_timer = STMMAC_DEFAULT_LPI_TIMER;
-module_param(eee_timer, int, S_IRUGO | S_IWUSR);
+module_param(eee_timer, int, 0644);
 MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec");
 #define STMMAC_LPI_T(x) (jiffies + msecs_to_jiffies(x))
 
@@ -105,7 +105,7 @@ MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec");
  * but allow user to force to use the chain instead of the ring
  */
 static unsigned int chain_mode;
-module_param(chain_mode, int, S_IRUGO);
+module_param(chain_mode, int, 0444);
 MODULE_PARM_DESC(chain_mode, "To use chain instead of ring mode");
 
 static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
@@ -196,6 +196,20 @@ static void stmmac_start_all_queues(struct stmmac_priv *priv)
 		netif_tx_start_queue(netdev_get_tx_queue(priv->dev, queue));
 }
 
+static void stmmac_service_event_schedule(struct stmmac_priv *priv)
+{
+	if (!test_bit(STMMAC_DOWN, &priv->state) &&
+	    !test_and_set_bit(STMMAC_SERVICE_SCHED, &priv->state))
+		queue_work(priv->wq, &priv->service_task);
+}
+
+static void stmmac_global_err(struct stmmac_priv *priv)
+{
+	netif_carrier_off(priv->dev);
+	set_bit(STMMAC_RESET_REQUESTED, &priv->state);
+	stmmac_service_event_schedule(priv);
+}
+
 /**
  * stmmac_clk_csr_set - dynamically set the MDC clock
  * @priv: driver private structure
@@ -2000,6 +2014,22 @@ static void stmmac_set_dma_operation_mode(struct stmmac_priv *priv, u32 txmode,
 	}
 }
 
+static bool stmmac_safety_feat_interrupt(struct stmmac_priv *priv)
+{
+	bool ret = false;
+
+	/* Safety features are only available in cores >= 5.10 */
+	if (priv->synopsys_id < DWMAC_CORE_5_10)
+		return ret;
+	if (priv->hw->mac->safety_feat_irq_status)
+		ret = priv->hw->mac->safety_feat_irq_status(priv->dev,
+				priv->ioaddr, priv->dma_cap.asp, &priv->sstats);
+
+	if (ret)
+		stmmac_global_err(priv);
+	return ret;
+}
+
 /**
  * stmmac_dma_interrupt - DMA ISR
  * @priv: driver private structure
@@ -2489,6 +2519,17 @@ static void stmmac_mtl_configuration(struct stmmac_priv *priv)
 		stmmac_mac_config_rx_queues_routing(priv);
 }
 
+static void stmmac_safety_feat_configuration(struct stmmac_priv *priv)
+{
+	if (priv->hw->mac->safety_feat_config && priv->dma_cap.asp) {
+		netdev_info(priv->dev, "Enabling Safety Features\n");
+		priv->hw->mac->safety_feat_config(priv->ioaddr,
+				priv->dma_cap.asp);
+	} else {
+		netdev_info(priv->dev, "No Safety Features support found\n");
+	}
+}
+
 /**
  * stmmac_hw_setup - setup mac in a usable state.
  *  @dev : pointer to the device structure.
@@ -2540,6 +2581,10 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp)
 	if (priv->synopsys_id >= DWMAC_CORE_4_00)
 		stmmac_mtl_configuration(priv);
 
+	/* Initialize Safety Features */
+	if (priv->synopsys_id >= DWMAC_CORE_5_10)
+		stmmac_safety_feat_configuration(priv);
+
 	ret = priv->hw->mac->rx_ipc(priv->hw);
 	if (!ret) {
 		netdev_warn(priv->dev, "RX IPC Checksum Offload disabled\n");
@@ -3587,12 +3632,8 @@ static int stmmac_poll(struct napi_struct *napi, int budget)
 static void stmmac_tx_timeout(struct net_device *dev)
 {
 	struct stmmac_priv *priv = netdev_priv(dev);
-	u32 tx_count = priv->plat->tx_queues_to_use;
-	u32 chan;
 
-	/* Clear Tx resources and restart transmitting again */
-	for (chan = 0; chan < tx_count; chan++)
-		stmmac_tx_err(priv, chan);
+	stmmac_global_err(priv);
 }
 
 /**
@@ -3716,6 +3757,13 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
 		return IRQ_NONE;
 	}
 
+	/* Check if adapter is up */
+	if (test_bit(STMMAC_DOWN, &priv->state))
+		return IRQ_HANDLED;
+	/* Check if a fatal error happened */
+	if (stmmac_safety_feat_interrupt(priv))
+		return IRQ_HANDLED;
+
 	/* To handle GMAC own interrupts */
 	if ((priv->plat->has_gmac) || (priv->plat->has_gmac4)) {
 		int status = priv->hw->mac->host_irq_status(priv->hw,
@@ -4001,7 +4049,7 @@ static int stmmac_init_fs(struct net_device *dev)
 
 	/* Entry to report DMA RX/TX rings */
 	priv->dbgfs_rings_status =
-		debugfs_create_file("descriptors_status", S_IRUGO,
+		debugfs_create_file("descriptors_status", 0444,
 				    priv->dbgfs_dir, dev,
 				    &stmmac_rings_status_fops);
 
@@ -4013,9 +4061,9 @@ static int stmmac_init_fs(struct net_device *dev)
 	}
 
 	/* Entry to report the DMA HW features */
-	priv->dbgfs_dma_cap = debugfs_create_file("dma_cap", S_IRUGO,
-					    priv->dbgfs_dir,
-					    dev, &stmmac_dma_cap_fops);
+	priv->dbgfs_dma_cap = debugfs_create_file("dma_cap", 0444,
+						  priv->dbgfs_dir,
+						  dev, &stmmac_dma_cap_fops);
 
 	if (!priv->dbgfs_dma_cap || IS_ERR(priv->dbgfs_dma_cap)) {
 		netdev_err(priv->dev, "ERROR creating stmmac MMC debugfs file\n");
@@ -4051,6 +4099,37 @@ static const struct net_device_ops stmmac_netdev_ops = {
 	.ndo_set_mac_address = stmmac_set_mac_address,
 };
 
+static void stmmac_reset_subtask(struct stmmac_priv *priv)
+{
+	if (!test_and_clear_bit(STMMAC_RESET_REQUESTED, &priv->state))
+		return;
+	if (test_bit(STMMAC_DOWN, &priv->state))
+		return;
+
+	netdev_err(priv->dev, "Reset adapter.\n");
+
+	rtnl_lock();
+	netif_trans_update(priv->dev);
+	while (test_and_set_bit(STMMAC_RESETING, &priv->state))
+		usleep_range(1000, 2000);
+
+	set_bit(STMMAC_DOWN, &priv->state);
+	dev_close(priv->dev);
+	dev_open(priv->dev);
+	clear_bit(STMMAC_DOWN, &priv->state);
+	clear_bit(STMMAC_RESETING, &priv->state);
+	rtnl_unlock();
+}
+
+static void stmmac_service_task(struct work_struct *work)
+{
+	struct stmmac_priv *priv = container_of(work, struct stmmac_priv,
+			service_task);
+
+	stmmac_reset_subtask(priv);
+	clear_bit(STMMAC_SERVICE_SCHED, &priv->state);
+}
+
 /**
  *  stmmac_hw_init - Init the MAC device
  *  @priv: driver private structure
@@ -4212,6 +4291,15 @@ int stmmac_dvr_probe(struct device *device,
 	/* Verify driver arguments */
 	stmmac_verify_args();
 
+	/* Allocate workqueue */
+	priv->wq = create_singlethread_workqueue("stmmac_wq");
+	if (!priv->wq) {
+		dev_err(priv->device, "failed to create workqueue\n");
+		goto error_wq;
+	}
+
+	INIT_WORK(&priv->service_task, stmmac_service_task);
+
 	/* Override with kernel parameters if supplied XXX CRS XXX
 	 * this needs to have multiple instances
 	 */
@@ -4342,6 +4430,8 @@ error_mdio_register:
 		netif_napi_del(&rx_q->napi);
 	}
 error_hw_init:
+	destroy_workqueue(priv->wq);
+error_wq:
 	free_netdev(ndev);
 
 	return ret;
@@ -4374,6 +4464,7 @@ int stmmac_dvr_remove(struct device *dev)
 	    priv->hw->pcs != STMMAC_PCS_TBI &&
 	    priv->hw->pcs != STMMAC_PCS_RTBI)
 		stmmac_mdio_unregister(ndev);
+	destroy_workqueue(priv->wq);
 	free_netdev(ndev);
 
 	return 0;