Merge branch 'thunderx-fixes'

Sunil Goutham says:

====================
thunderx: miscellaneous fixes

This patch series contains fixes for various issues observed
with BGX and NIC drivers.

Changes from v1:
- Fixed comment syle in the first patch of the series
- Removed 'Increase transmit queue length' patch from the series,
  will recheck if it's a driver or system issue and resubmit.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/thunder/nic.h

@@ -120,10 +120,9 @@
  * Calculated for SCLK of 700Mhz
  * value written should be a 1/16th of what is expected
  *
- * 1 tick per 0.05usec = value of 2.2
- * This 10% would be covered in CQ timer thresh value
+ * 1 tick per 0.025usec
  */
-#define NICPF_CLK_PER_INT_TICK		2
+#define NICPF_CLK_PER_INT_TICK		1
 
 /* Time to wait before we decide that a SQ is stuck.
  *

drivers/net/ethernet/cavium/thunder/nic_main.c

@@ -37,6 +37,7 @@ struct nicpf {
 #define	NIC_GET_BGX_FROM_VF_LMAC_MAP(map)	((map >> 4) & 0xF)
 #define	NIC_GET_LMAC_FROM_VF_LMAC_MAP(map)	(map & 0xF)
 	u8			vf_lmac_map[MAX_LMAC];
+	u8			lmac_cnt;
 	struct delayed_work     dwork;
 	struct workqueue_struct *check_link;
 	u8			link[MAX_LMAC];
@@ -279,6 +280,7 @@ static void nic_set_lmac_vf_mapping(struct nicpf *nic)
 	u64 lmac_credit;
 
 	nic->num_vf_en = 0;
+	nic->lmac_cnt = 0;
 
 	for (bgx = 0; bgx < NIC_MAX_BGX; bgx++) {
 		if (!(bgx_map & (1 << bgx)))
@@ -288,6 +290,7 @@ static void nic_set_lmac_vf_mapping(struct nicpf *nic)
 			nic->vf_lmac_map[next_bgx_lmac++] =
 						NIC_SET_VF_LMAC_MAP(bgx, lmac);
 		nic->num_vf_en += lmac_cnt;
+		nic->lmac_cnt += lmac_cnt;
 
 		/* Program LMAC credits */
 		lmac_credit = (1ull << 1); /* channel credit enable */
@@ -715,6 +718,13 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf)
 	case NIC_MBOX_MSG_CFG_DONE:
 		/* Last message of VF config msg sequence */
 		nic->vf_enabled[vf] = true;
+		if (vf >= nic->lmac_cnt)
+			goto unlock;
+
+		bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+		lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+
+		bgx_lmac_rx_tx_enable(nic->node, bgx, lmac, true);
 		goto unlock;
 	case NIC_MBOX_MSG_SHUTDOWN:
 		/* First msg in VF teardown sequence */
@@ -722,6 +732,14 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf)
 		if (vf >= nic->num_vf_en)
 			nic->sqs_used[vf - nic->num_vf_en] = false;
 		nic->pqs_vf[vf] = 0;
+
+		if (vf >= nic->lmac_cnt)
+			break;
+
+		bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+		lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
+
+		bgx_lmac_rx_tx_enable(nic->node, bgx, lmac, false);
 		break;
 	case NIC_MBOX_MSG_ALLOC_SQS:
 		nic_alloc_sqs(nic, &mbx.sqs_alloc);
@@ -940,7 +958,7 @@ static void nic_poll_for_link(struct work_struct *work)
 
 	mbx.link_status.msg = NIC_MBOX_MSG_BGX_LINK_CHANGE;
 
-	for (vf = 0; vf < nic->num_vf_en; vf++) {
+	for (vf = 0; vf < nic->lmac_cnt; vf++) {
 		/* Poll only if VF is UP */
 		if (!nic->vf_enabled[vf])
 			continue;
@@ -1074,8 +1092,7 @@ static void nic_remove(struct pci_dev *pdev)
 
 	if (nic->check_link) {
 		/* Destroy work Queue */
-		cancel_delayed_work(&nic->dwork);
-		flush_workqueue(nic->check_link);
+		cancel_delayed_work_sync(&nic->dwork);
 		destroy_workqueue(nic->check_link);
 	}
 

drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c

@@ -112,6 +112,13 @@ static int nicvf_get_settings(struct net_device *netdev,
 
 	cmd->supported = 0;
 	cmd->transceiver = XCVR_EXTERNAL;
+
+	if (!nic->link_up) {
+		cmd->duplex = DUPLEX_UNKNOWN;
+		ethtool_cmd_speed_set(cmd, SPEED_UNKNOWN);
+		return 0;
+	}
+
 	if (nic->speed <= 1000) {
 		cmd->port = PORT_MII;
 		cmd->autoneg = AUTONEG_ENABLE;
@@ -125,6 +132,13 @@ static int nicvf_get_settings(struct net_device *netdev,
 	return 0;
 }
 
+static u32 nicvf_get_link(struct net_device *netdev)
+{
+	struct nicvf *nic = netdev_priv(netdev);
+
+	return nic->link_up;
+}
+
 static void nicvf_get_drvinfo(struct net_device *netdev,
 			      struct ethtool_drvinfo *info)
 {
@@ -660,7 +674,7 @@ static int nicvf_set_channels(struct net_device *dev,
 
 static const struct ethtool_ops nicvf_ethtool_ops = {
 	.get_settings		= nicvf_get_settings,
-	.get_link		= ethtool_op_get_link,
+	.get_link		= nicvf_get_link,
 	.get_drvinfo		= nicvf_get_drvinfo,
 	.get_msglevel		= nicvf_get_msglevel,
 	.set_msglevel		= nicvf_set_msglevel,

drivers/net/ethernet/cavium/thunder/nicvf_main.c

@@ -1057,6 +1057,7 @@ int nicvf_stop(struct net_device *netdev)
 
 	netif_carrier_off(netdev);
 	netif_tx_stop_all_queues(nic->netdev);
+	nic->link_up = false;
 
 	/* Teardown secondary qsets first */
 	if (!nic->sqs_mode) {
@@ -1211,9 +1212,6 @@ int nicvf_open(struct net_device *netdev)
 	nic->drv_stats.txq_stop = 0;
 	nic->drv_stats.txq_wake = 0;
 
-	netif_carrier_on(netdev);
-	netif_tx_start_all_queues(netdev);
-
 	return 0;
 cleanup:
 	nicvf_disable_intr(nic, NICVF_INTR_MBOX, 0);

drivers/net/ethernet/cavium/thunder/nicvf_queues.c

@@ -592,7 +592,7 @@ void nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs,
 	/* Set threshold value for interrupt generation */
 	nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_THRESH, qidx, cq->thresh);
 	nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG2,
-			      qidx, nic->cq_coalesce_usecs);
+			      qidx, CMP_QUEUE_TIMER_THRESH);
 }
 
 /* Configures transmit queue */

drivers/net/ethernet/cavium/thunder/nicvf_queues.h

@@ -76,7 +76,7 @@
 #define CMP_QSIZE		CMP_QUEUE_SIZE2
 #define CMP_QUEUE_LEN		(1ULL << (CMP_QSIZE + 10))
 #define CMP_QUEUE_CQE_THRESH	0
-#define CMP_QUEUE_TIMER_THRESH	220 /* 10usec */
+#define CMP_QUEUE_TIMER_THRESH	80 /* ~2usec */
 
 #define RBDR_SIZE		RBDR_SIZE0
 #define RCV_BUF_COUNT		(1ULL << (RBDR_SIZE + 13))

drivers/net/ethernet/cavium/thunder/thunder_bgx.c

@@ -186,6 +186,23 @@ void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac)
 }
 EXPORT_SYMBOL(bgx_set_lmac_mac);
 
+void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable)
+{
+	struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
+	u64 cfg;
+
+	if (!bgx)
+		return;
+
+	cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG);
+	if (enable)
+		cfg |= CMR_PKT_RX_EN | CMR_PKT_TX_EN;
+	else
+		cfg &= ~(CMR_PKT_RX_EN | CMR_PKT_TX_EN);
+	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg);
+}
+EXPORT_SYMBOL(bgx_lmac_rx_tx_enable);
+
 static void bgx_sgmii_change_link_state(struct lmac *lmac)
 {
 	struct bgx *bgx = lmac->bgx;
@@ -612,6 +629,8 @@ static void bgx_poll_for_link(struct work_struct *work)
 		lmac->last_duplex = 1;
 	} else {
 		lmac->link_up = 0;
+		lmac->last_speed = SPEED_UNKNOWN;
+		lmac->last_duplex = DUPLEX_UNKNOWN;
 	}
 
 	if (lmac->last_link != lmac->link_up) {
@@ -654,8 +673,7 @@ static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
 	}
 
 	/* Enable lmac */
-	bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG,
-		       CMR_EN | CMR_PKT_RX_EN | CMR_PKT_TX_EN);
+	bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN);
 
 	/* Restore default cfg, incase low level firmware changed it */
 	bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, 0x03);
@@ -695,8 +713,7 @@ static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)
 	lmac = &bgx->lmac[lmacid];
 	if (lmac->check_link) {
 		/* Destroy work queue */
-		cancel_delayed_work(&lmac->dwork);
-		flush_workqueue(lmac->check_link);
+		cancel_delayed_work_sync(&lmac->dwork);
 		destroy_workqueue(lmac->check_link);
 	}
 
@@ -1009,6 +1026,9 @@ static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct bgx *bgx = NULL;
 	u8 lmac;
 
+	/* Load octeon mdio driver */
+	octeon_mdiobus_force_mod_depencency();
+
 	bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL);
 	if (!bgx)
 		return -ENOMEM;

drivers/net/ethernet/cavium/thunder/thunder_bgx.h

@@ -182,6 +182,8 @@ enum MCAST_MODE {
 #define BCAST_ACCEPT	1
 #define CAM_ACCEPT	1
 
+void octeon_mdiobus_force_mod_depencency(void);
+void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable);
 void bgx_add_dmac_addr(u64 dmac, int node, int bgx_idx, int lmac);
 unsigned bgx_get_map(int node);
 int bgx_get_lmac_count(int node, int bgx);