qed*: esl priv flag support through ethtool

ESL(Enhanced System Lockdown) was designed to lock PCI adapter firmware
images and prevent changes to critical non-volatile configuration data
so that uncontrolled, malicious or unintentional modification to the
adapters are avoided, ensuring it's operational state. Once this feature is
enabled, the device is locked, rejecting any modification to non-volatile
images. Once unlocked, the protection is off such that firmware and
non-volatile configurations may be altered.

Driver just reflects the capability and status of this through
the ethtool private flag.

Signed-off-by: Manish Chopra <[e-mail]>
Signed-off-by: Prabhakar Kushwaha <[e-mail]>
Signed-off-by: Alok Prasad <[e-mail]>
Signed-off-by: Ariel Elior <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/qlogic/qed/qed_main.c

···
 			dev_info->wol_support = true;
 
 		dev_info->smart_an = qed_mcp_is_smart_an_supported(p_hwfn);
-
+		dev_info->esl = qed_mcp_is_esl_supported(p_hwfn);
 		dev_info->abs_pf_id = QED_LEADING_HWFN(cdev)->abs_pf_id;
 	} else {
 		qed_vf_get_fw_version(&cdev->hwfns[0], &dev_info->fw_major,
···
 	return QED_AFFIN_HWFN_IDX(cdev);
 }
 
+static int qed_get_esl_status(struct qed_dev *cdev, bool *esl_active)
+{
+	struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
+	struct qed_ptt *ptt;
+	int rc = 0;
+
+	*esl_active = false;
+
+	if (IS_VF(cdev))
+		return 0;
+
+	ptt = qed_ptt_acquire(hwfn);
+	if (!ptt)
+		return -EAGAIN;
+
+	rc = qed_mcp_get_esl_status(hwfn, ptt, esl_active);
+
+	qed_ptt_release(hwfn, ptt);
+
+	return rc;
+}
+
 static struct qed_selftest_ops qed_selftest_ops_pass = {
 	.selftest_memory = &qed_selftest_memory,
 	.selftest_interrupt = &qed_selftest_interrupt,
···
 	.set_grc_config = &qed_set_grc_config,
 	.mfw_report = &qed_mfw_report,
 	.get_sb_info = &qed_get_sb_info,
+	.get_esl_status = &qed_get_esl_status,
 };
 
 void qed_get_protocol_stats(struct qed_dev *cdev,

drivers/net/ethernet/qlogic/qed/qed_mcp.c

···
 	return qed_mcp_send_debug_data(p_hwfn, p_ptt,
 				       QED_MCP_DBG_DATA_TYPE_RAW, p_buf, size);
 }
+
+bool qed_mcp_is_esl_supported(struct qed_hwfn *p_hwfn)
+{
+	return !!(p_hwfn->mcp_info->capabilities &
+		  FW_MB_PARAM_FEATURE_SUPPORT_ENHANCED_SYS_LCK);
+}
+
+int qed_mcp_get_esl_status(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, bool *active)
+{
+	u32 resp = 0, param = 0;
+	int rc;
+
+	rc = qed_mcp_cmd(p_hwfn, p_ptt, DRV_MSG_CODE_GET_MANAGEMENT_STATUS, 0, &resp, &param);
+	if (rc) {
+		DP_NOTICE(p_hwfn, "Failed to send ESL command, rc = %d\n", rc);
+		return rc;
+	}
+
+	*active = !!(param & FW_MB_PARAM_MANAGEMENT_STATUS_LOCKDOWN_ENABLED);
+
+	return 0;
+}

drivers/net/ethernet/qlogic/qed/qed_mcp.h

···
 int qed_mcp_nvm_set_cfg(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
 			u16 option_id, u8 entity_id, u16 flags, u8 *p_buf,
 			u32 len);
+
+/**
+ * qed_mcp_is_esl_supported(): Return whether management firmware support ESL or not.
+ *
+ * @p_hwfn: hw function pointer
+ *
+ * Return: true if esl is supported, otherwise return false
+ */
+bool qed_mcp_is_esl_supported(struct qed_hwfn *p_hwfn);
+
+/**
+ * qed_mcp_get_esl_status(): Get enhanced system lockdown status
+ *
+ * @p_hwfn: hw function pointer
+ * @p_ptt: ptt resource pointer
+ * @active: ESL active status data pointer
+ *
+ * Return: 0 with esl status info on success, otherwise return error
+ */
+int qed_mcp_get_esl_status(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, bool *active);
 #endif

drivers/net/ethernet/qlogic/qed/qed_mfw_hsi.h

···
 	DRV_MSG_CODE_CFG_VF_MSIX = DRV_MSG_CODE(0xc001),
 	DRV_MSG_CODE_CFG_PF_VFS_MSIX = DRV_MSG_CODE(0xc002),
 	DRV_MSG_CODE_DEBUG_DATA_SEND = DRV_MSG_CODE(0xc004),
+	DRV_MSG_CODE_GET_MANAGEMENT_STATUS = DRV_MSG_CODE(0xc007),
 };
 
 #define DRV_MSG_CODE_VMAC_TYPE_SHIFT            4

drivers/net/ethernet/qlogic/qede/qede_ethtool.c

···
 	QEDE_PRI_FLAG_CMT,
 	QEDE_PRI_FLAG_SMART_AN_SUPPORT, /* MFW supports SmartAN */
 	QEDE_PRI_FLAG_RECOVER_ON_ERROR,
+	QEDE_PRI_FLAG_ESL_SUPPORT, /* MFW supports Enhanced System Lockdown */
+	QEDE_PRI_FLAG_ESL_ACTIVE, /* Enhanced System Lockdown Active status */
 	QEDE_PRI_FLAG_LEN,
 };
 
···
 	"Coupled-Function",
 	"SmartAN capable",
 	"Recover on error",
+	"ESL capable",
+	"ESL active",
 };
 
 enum qede_ethtool_tests {
···
 static u32 qede_get_priv_flags(struct net_device *dev)
 {
 	struct qede_dev *edev = netdev_priv(dev);
+	bool esl_active;
 	u32 flags = 0;
 
 	if (edev->dev_info.common.num_hwfns > 1)
···
 
 	if (edev->err_flags & BIT(QEDE_ERR_IS_RECOVERABLE))
 		flags |= BIT(QEDE_PRI_FLAG_RECOVER_ON_ERROR);
+
+	if (edev->dev_info.common.esl)
+		flags |= BIT(QEDE_PRI_FLAG_ESL_SUPPORT);
+
+	edev->ops->common->get_esl_status(edev->cdev, &esl_active);
+
+	if (esl_active)
+		flags |= BIT(QEDE_PRI_FLAG_ESL_ACTIVE);
 
 	return flags;
 }

include/linux/qed/qed_if.h

···
 
 	bool wol_support;
 	bool smart_an;
+	bool esl;
 
 	/* MBI version */
 	u32 mbi_version;
···
 
 	int (*get_sb_info)(struct qed_dev *cdev, struct qed_sb_info *sb,
 			   u16 qid, struct qed_sb_info_dbg *sb_dbg);
+
+	int (*get_esl_status)(struct qed_dev *cdev, bool *esl_active);
 };
 
 #define MASK_FIELD(_name, _value) \