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Message-ID: <20240715191148.746362-1-kheib@redhat.com>
Date: Mon, 15 Jul 2024 15:11:48 -0400
From: Kamal Heib <kheib@...hat.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	Tony Nguyen <anthony.l.nguyen@...el.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Ivan Vecera <ivecera@...hat.com>,
	Jakub Kicinski <kuba@...nel.org>,
	"David S . Miller" <davem@...emloft.net>,
	Paolo Abeni <pabeni@...hat.com>,
	Kamal Heib <kheib@...hat.com>
Subject: [PATCH iwl-next] i40e: Add support for fw health report

Add support for reporting fw status via the devlink health report.

Example:
 # devlink health show pci/0000:02:00.0 reporter fw
 pci/0000:02:00.0:
   reporter fw
     state healthy error 0 recover 0
 # devlink health diagnose pci/0000:02:00.0 reporter fw
 Status: normal

Signed-off-by: Kamal Heib <kheib@...hat.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h        |  1 +
 .../net/ethernet/intel/i40e/i40e_devlink.c    | 57 +++++++++++++++++++
 .../net/ethernet/intel/i40e/i40e_devlink.h    |  2 +
 drivers/net/ethernet/intel/i40e/i40e_main.c   | 15 +++++
 4 files changed, 75 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index d546567e0286..f94671b6e7c6 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -465,6 +465,7 @@ static inline const u8 *i40e_channel_mac(struct i40e_channel *ch)
 struct i40e_pf {
 	struct pci_dev *pdev;
 	struct devlink_port devlink_port;
+	struct devlink_health_reporter *fw_health_report;
 	struct i40e_hw hw;
 	DECLARE_BITMAP(state, __I40E_STATE_SIZE__);
 	struct msix_entry *msix_entries;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_devlink.c b/drivers/net/ethernet/intel/i40e/i40e_devlink.c
index cc4e9e2addb7..ad91c150cdba 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_devlink.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_devlink.c
@@ -122,6 +122,25 @@ static int i40e_devlink_info_get(struct devlink *dl,
 	return err;
 }
 
+static int i40e_fw_reporter_diagnose(struct devlink_health_reporter *reporter,
+				     struct devlink_fmsg *fmsg,
+				     struct netlink_ext_ack *extack)
+{
+	struct i40e_pf *pf = devlink_health_reporter_priv(reporter);
+
+	if (test_bit(__I40E_RECOVERY_MODE, pf->state))
+		devlink_fmsg_string_pair_put(fmsg, "Status", "recovery");
+	else
+		devlink_fmsg_string_pair_put(fmsg, "Status", "normal");
+
+	return 0;
+}
+
+static const struct devlink_health_reporter_ops i40e_fw_reporter_ops = {
+	.name = "fw",
+	.diagnose = i40e_fw_reporter_diagnose,
+};
+
 static const struct devlink_ops i40e_devlink_ops = {
 	.info_get = i40e_devlink_info_get,
 };
@@ -233,3 +252,41 @@ void i40e_devlink_destroy_port(struct i40e_pf *pf)
 {
 	devlink_port_unregister(&pf->devlink_port);
 }
+
+/**
+ * i40e_devlink_create_health_reporter - Create the health reporter for this PF
+ * @pf: the PF to create reporter for
+ *
+ * Create health reporter for this PF.
+ *
+ * Return: zero on success or an error code on failure.
+ **/
+int i40e_devlink_create_health_reporter(struct i40e_pf *pf)
+{
+	struct devlink *devlink = priv_to_devlink(pf);
+	struct device *dev = &pf->pdev->dev;
+	int rc = 0;
+
+	devl_lock(devlink);
+	pf->fw_health_report =
+		devl_health_reporter_create(devlink, &i40e_fw_reporter_ops, 0, pf);
+	if (IS_ERR(pf->fw_health_report)) {
+		rc = PTR_ERR(pf->fw_health_report);
+		dev_err(dev, "Failed to create fw reporter, err = %d\n", rc);
+	}
+	devl_unlock(devlink);
+
+	return rc;
+}
+
+/**
+ * i40e_devlink_destroy_health_reporter - Destroy the health reporter
+ * @pf: the PF to cleanup
+ *
+ * Destroy the health reporter
+ **/
+void i40e_devlink_destroy_health_reporter(struct i40e_pf *pf)
+{
+	if (!IS_ERR_OR_NULL(pf->fw_health_report))
+		devlink_health_reporter_destroy(pf->fw_health_report);
+}
diff --git a/drivers/net/ethernet/intel/i40e/i40e_devlink.h b/drivers/net/ethernet/intel/i40e/i40e_devlink.h
index 469fb3d2ee25..018679094bb5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_devlink.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_devlink.h
@@ -14,5 +14,7 @@ void i40e_devlink_register(struct i40e_pf *pf);
 void i40e_devlink_unregister(struct i40e_pf *pf);
 int i40e_devlink_create_port(struct i40e_pf *pf);
 void i40e_devlink_destroy_port(struct i40e_pf *pf);
+int i40e_devlink_create_health_reporter(struct i40e_pf *pf);
+void i40e_devlink_destroy_health_reporter(struct i40e_pf *pf);
 
 #endif /* _I40E_DEVLINK_H_ */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index cbcfada7b357..13cad5f58029 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -15370,6 +15370,9 @@ static bool i40e_check_recovery_mode(struct i40e_pf *pf)
 		dev_crit(&pf->pdev->dev, "Firmware recovery mode detected. Limiting functionality.\n");
 		dev_crit(&pf->pdev->dev, "Refer to the Intel(R) Ethernet Adapters and Devices User Guide for details on firmware recovery mode.\n");
 		set_bit(__I40E_RECOVERY_MODE, pf->state);
+		if (pf->fw_health_report)
+			devlink_health_report(pf->fw_health_report,
+					      "FW recovery mode detected", pf);
 
 		return true;
 	}
@@ -15636,6 +15639,14 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		err = -ENOMEM;
 		goto err_pf_alloc;
 	}
+
+	err = i40e_devlink_create_health_reporter(pf);
+	if (err) {
+		dev_err(&pdev->dev,
+			"Failed to create health reporter %d\n", err);
+		goto err_health_reporter;
+	}
+
 	pf->next_vsi = 0;
 	pf->pdev = pdev;
 	set_bit(__I40E_DOWN, pf->state);
@@ -16180,6 +16191,8 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 err_pf_reset:
 	iounmap(hw->hw_addr);
 err_ioremap:
+	i40e_devlink_destroy_health_reporter(pf);
+err_health_reporter:
 	i40e_free_pf(pf);
 err_pf_alloc:
 	pci_release_mem_regions(pdev);
@@ -16209,6 +16222,8 @@ static void i40e_remove(struct pci_dev *pdev)
 
 	i40e_devlink_unregister(pf);
 
+	i40e_devlink_destroy_health_reporter(pf);
+
 	i40e_dbg_pf_exit(pf);
 
 	i40e_ptp_stop(pf);
-- 
2.45.2


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