staging: qlge: Initialize devlink health dump framework

Initialize devlink health dump framework for the qlge driver so the
coredump could be done via devlink.

struct qlge_adapter is now used as the private data structure of
struct devlink so it could exist independently of struct net_device
and devlink reload could be supported in the future. The private data
of PCIe driver now points to qlge_adapter.

Since devlink_alloc will zero out struct qlge_adapter, memset in
qlge_init_device is not necessary.
Signed-off-by: Coiby Xu <coiby.xu@gmail.com>
Link: https://lore.kernel.org/r/20210123104613.38359-3-coiby.xu@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/qlge/Kconfig

@@ -3,6 +3,7 @@
 config QLGE
 	tristate "QLogic QLGE 10Gb Ethernet Driver Support"
 	depends on ETHERNET && PCI
+	select NET_DEVLINK
 	help
 	This driver supports QLogic ISP8XXX 10Gb Ethernet cards.
 

drivers/staging/qlge/Makefile

@@ -5,4 +5,4 @@
 
 obj-$(CONFIG_QLGE) += qlge.o
 
-qlge-objs := qlge_main.o qlge_dbg.o qlge_mpi.o qlge_ethtool.o
+qlge-objs := qlge_main.o qlge_dbg.o qlge_mpi.o qlge_ethtool.o qlge_devlink.o

drivers/staging/qlge/qlge.h

@@ -2060,6 +2060,18 @@ struct nic_operations {
 	int (*port_initialize)(struct qlge_adapter *qdev);
 };
 
+struct qlge_netdev_priv {
+	struct qlge_adapter *qdev;
+	struct net_device *ndev;
+};
+
+static inline
+struct qlge_adapter *netdev_to_qdev(struct net_device *ndev)
+{
+	struct qlge_netdev_priv *ndev_priv = netdev_priv(ndev);
+
+	return ndev_priv->qdev;
+}
 /*
  * The main Adapter structure definition.
  * This structure has all fields relevant to the hardware.
@@ -2077,6 +2089,7 @@ struct qlge_adapter {
 	struct pci_dev *pdev;
 	struct net_device *ndev;	/* Parent NET device */
 
+	struct devlink_health_reporter *reporter;
 	/* Hardware information */
 	u32 chip_rev_id;
 	u32 fw_rev_id;

drivers/staging/qlge/qlge_devlink.c

+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "qlge.h"
+#include "qlge_devlink.h"
+
+static int
+qlge_reporter_coredump(struct devlink_health_reporter *reporter,
+		       struct devlink_fmsg *fmsg, void *priv_ctx,
+		       struct netlink_ext_ack *extack)
+{
+	return 0;
+}
+
+static const struct devlink_health_reporter_ops qlge_reporter_ops = {
+	.name = "dummy",
+	.dump = qlge_reporter_coredump,
+};
+
+void qlge_health_create_reporters(struct qlge_adapter *priv)
+{
+	struct devlink_health_reporter *reporter;
+	struct devlink *devlink;
+
+	devlink = priv_to_devlink(priv);
+	priv->reporter =
+		devlink_health_reporter_create(devlink, &qlge_reporter_ops,
+					       0, priv);
+	if (IS_ERR(priv->reporter))
+		netdev_warn(priv->ndev,
+			    "Failed to create reporter, err = %ld\n",
+			    PTR_ERR(reporter));
+}

drivers/staging/qlge/qlge_devlink.h

+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef QLGE_DEVLINK_H
+#define QLGE_DEVLINK_H
+
+#include <net/devlink.h>
+
+void qlge_health_create_reporters(struct qlge_adapter *priv);
+
+#endif /* QLGE_DEVLINK_H */

drivers/staging/qlge/qlge_ethtool.c

@@ -366,7 +366,7 @@ static void
 qlge_get_ethtool_stats(struct net_device *ndev,
 		       struct ethtool_stats *stats, u64 *data)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 	int index, length;
 
 	length = QLGE_STATS_LEN;
@@ -383,7 +383,7 @@ qlge_get_ethtool_stats(struct net_device *ndev,
 static int qlge_get_link_ksettings(struct net_device *ndev,
 				   struct ethtool_link_ksettings *ecmd)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 	u32 supported, advertising;
 
 	supported = SUPPORTED_10000baseT_Full;
@@ -415,7 +415,7 @@ static int qlge_get_link_ksettings(struct net_device *ndev,
 static void qlge_get_drvinfo(struct net_device *ndev,
 			     struct ethtool_drvinfo *drvinfo)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	strlcpy(drvinfo->driver, qlge_driver_name, sizeof(drvinfo->driver));
 	strlcpy(drvinfo->version, qlge_driver_version,
@@ -431,7 +431,7 @@ static void qlge_get_drvinfo(struct net_device *ndev,
 
 static void qlge_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 	unsigned short ssys_dev = qdev->pdev->subsystem_device;
 
 	/* WOL is only supported for mezz card. */
@@ -444,7 +444,7 @@ static void qlge_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
 
 static int qlge_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 	unsigned short ssys_dev = qdev->pdev->subsystem_device;
 
 	/* WOL is only supported for mezz card. */
@@ -466,7 +466,7 @@ static int qlge_set_phys_id(struct net_device *ndev,
 			    enum ethtool_phys_id_state state)
 
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	switch (state) {
 	case ETHTOOL_ID_ACTIVE:
@@ -574,7 +574,7 @@ static int qlge_loopback_test(struct qlge_adapter *qdev, u64 *data)
 static void qlge_self_test(struct net_device *ndev,
 			   struct ethtool_test *eth_test, u64 *data)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	memset(data, 0, sizeof(u64) * QLGE_TEST_LEN);
 
@@ -603,7 +603,7 @@ static void qlge_self_test(struct net_device *ndev,
 
 static int qlge_get_regs_len(struct net_device *ndev)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	if (!test_bit(QL_FRC_COREDUMP, &qdev->flags))
 		return sizeof(struct qlge_mpi_coredump);
@@ -614,7 +614,7 @@ static int qlge_get_regs_len(struct net_device *ndev)
 static void qlge_get_regs(struct net_device *ndev,
 			  struct ethtool_regs *regs, void *p)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	qlge_get_dump(qdev, p);
 	qdev->core_is_dumped = 0;
@@ -624,9 +624,9 @@ static void qlge_get_regs(struct net_device *ndev,
 		regs->len = sizeof(struct qlge_reg_dump);
 }
 
-static int qlge_get_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
+static int qlge_get_coalesce(struct net_device *ndev, struct ethtool_coalesce *c)
 {
-	struct qlge_adapter *qdev = netdev_priv(dev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	c->rx_coalesce_usecs = qdev->rx_coalesce_usecs;
 	c->tx_coalesce_usecs = qdev->tx_coalesce_usecs;
@@ -649,7 +649,7 @@ static int qlge_get_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
 
 static int qlge_set_coalesce(struct net_device *ndev, struct ethtool_coalesce *c)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	/* Validate user parameters. */
 	if (c->rx_coalesce_usecs > qdev->rx_ring_size / 2)
@@ -677,10 +677,10 @@ static int qlge_set_coalesce(struct net_device *ndev, struct ethtool_coalesce *c
 	return qlge_update_ring_coalescing(qdev);
 }
 
-static void qlge_get_pauseparam(struct net_device *netdev,
+static void qlge_get_pauseparam(struct net_device *ndev,
 				struct ethtool_pauseparam *pause)
 {
-	struct qlge_adapter *qdev = netdev_priv(netdev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	qlge_mb_get_port_cfg(qdev);
 	if (qdev->link_config & CFG_PAUSE_STD) {
@@ -689,10 +689,10 @@ static void qlge_get_pauseparam(struct net_device *netdev,
 	}
 }
 
-static int qlge_set_pauseparam(struct net_device *netdev,
+static int qlge_set_pauseparam(struct net_device *ndev,
 			       struct ethtool_pauseparam *pause)
 {
-	struct qlge_adapter *qdev = netdev_priv(netdev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	if ((pause->rx_pause) && (pause->tx_pause))
 		qdev->link_config |= CFG_PAUSE_STD;
@@ -706,14 +706,14 @@ static int qlge_set_pauseparam(struct net_device *netdev,
 
 static u32 qlge_get_msglevel(struct net_device *ndev)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	return qdev->msg_enable;
 }
 
 static void qlge_set_msglevel(struct net_device *ndev, u32 value)
 {
-	struct qlge_adapter *qdev = netdev_priv(ndev);
+	struct qlge_adapter *qdev = netdev_to_qdev(ndev);
 
 	qdev->msg_enable = value;
 }