@@ -13,4 +13,5 @@ obj-$(CONFIG_IAVF) += iavf.o
iavf-objs := iavf_main.o iavf_ethtool.o iavf_virtchnl.o iavf_fdir.o \
iavf_adv_rss.o \
- iavf_txrx.o iavf_common.o iavf_adminq.o
+ iavf_txrx.o iavf_common.o iavf_adminq.o \
+ iavf_ptp.o
@@ -2875,6 +2875,9 @@ static void iavf_init_config_adapter(struct iavf_adapter *adapter)
/* request initial VLAN offload settings */
iavf_set_vlan_offload_features(adapter, 0, netdev->features);
+ /* Setup initial PTP configuration */
+ iavf_ptp_init(adapter);
+
iavf_schedule_finish_config(adapter);
return;
@@ -5331,6 +5334,9 @@ static void iavf_remove(struct pci_dev *pdev)
}
iavf_misc_irq_disable(adapter);
+
+ iavf_ptp_release(adapter);
+
/* Shut down all the garbage mashers on the detention level */
cancel_work_sync(&adapter->reset_task);
cancel_delayed_work_sync(&adapter->watchdog_task);
new file mode 100644
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2024 Intel Corporation. */
+
+#include "iavf.h"
+
+/**
+ * iavf_ptp_cap_supported - Check if a PTP capability is supported
+ * @adapter: private adapter structure
+ * @cap: the capability bitmask to check
+ *
+ * Return true if every capability set in cap is also set in the enabled
+ * capabilities reported by the PF.
+ */
+bool iavf_ptp_cap_supported(struct iavf_adapter *adapter, u32 cap)
+{
+ if (!PTP_ALLOWED(adapter))
+ return false;
+
+ /* Only return true if every bit in cap is set in hw_caps.caps */
+ return (adapter->ptp.hw_caps.caps & cap) == cap;
+}
+
+/**
+ * iavf_ptp_register_clock - Register a new PTP for userspace
+ * @adapter: private adapter structure
+ *
+ * Allocate and register a new PTP clock device if necessary.
+ */
+static int iavf_ptp_register_clock(struct iavf_adapter *adapter)
+{
+ struct ptp_clock_info *ptp_info = &adapter->ptp.info;
+ struct device *dev = &adapter->pdev->dev;
+
+ memset(ptp_info, 0, sizeof(*ptp_info));
+
+ snprintf(ptp_info->name, sizeof(ptp_info->name) - 1, "%s-%s-clk",
+ dev_driver_string(dev),
+ dev_name(dev));
+ ptp_info->owner = THIS_MODULE;
+
+ adapter->ptp.clock = ptp_clock_register(ptp_info, dev);
+ if (IS_ERR(adapter->ptp.clock))
+ return PTR_ERR(adapter->ptp.clock);
+
+ dev_info(&adapter->pdev->dev, "PTP clock %s registered\n",
+ adapter->ptp.info.name);
+ return 0;
+}
+
+/**
+ * iavf_ptp_init - Initialize PTP support if capability was negotiated
+ * @adapter: private adapter structure
+ *
+ * Initialize PTP functionality, based on the capabilities that the PF has
+ * enabled for this VF.
+ */
+void iavf_ptp_init(struct iavf_adapter *adapter)
+{
+ struct device *dev = &adapter->pdev->dev;
+ int err;
+
+ if (WARN_ON(adapter->ptp.initialized)) {
+ dev_err(dev, "PTP functionality was already initialized!\n");
+ return;
+ }
+
+ if (!iavf_ptp_cap_supported(adapter, VIRTCHNL_1588_PTP_CAP_READ_PHC)) {
+ dev_dbg(dev, "Device does not have PTP clock support\n");
+ return;
+ }
+
+ err = iavf_ptp_register_clock(adapter);
+ if (err) {
+ dev_warn(dev, "Failed to register PTP clock device (%d)\n",
+ err);
+ return;
+ }
+
+ adapter->ptp.initialized = true;
+}
+
+/**
+ * iavf_ptp_release - Disable PTP support
+ * @adapter: private adapter structure
+ *
+ * Release all PTP resources that were previously initialized.
+ */
+void iavf_ptp_release(struct iavf_adapter *adapter)
+{
+ if (!IS_ERR_OR_NULL(adapter->ptp.clock)) {
+ dev_info(&adapter->pdev->dev, "removing PTP clock %s\n",
+ adapter->ptp.info.name);
+ ptp_clock_unregister(adapter->ptp.clock);
+ adapter->ptp.clock = NULL;
+ }
+
+ adapter->ptp.initialized = false;
+}
+
+/**
+ * iavf_ptp_process_caps - Handle change in PTP capabilities
+ * @adapter: private adapter structure
+ *
+ * Handle any state changes necessary due to change in PTP capabilities, such
+ * as after a device reset or change in configuration from the PF.
+ */
+void iavf_ptp_process_caps(struct iavf_adapter *adapter)
+{
+ struct device *dev = &adapter->pdev->dev;
+
+ dev_dbg(dev, "PTP capabilities changed at runtime\n");
+
+ /* Check if the device gained or lost necessary access to support the
+ * PTP hardware clock. If so, driver must respond appropriately by
+ * creating or destroying the PTP clock device.
+ */
+ if (adapter->ptp.initialized &&
+ !iavf_ptp_cap_supported(adapter, VIRTCHNL_1588_PTP_CAP_READ_PHC))
+ iavf_ptp_release(adapter);
+ else if (!adapter->ptp.initialized &&
+ iavf_ptp_cap_supported(adapter, VIRTCHNL_1588_PTP_CAP_READ_PHC))
+ iavf_ptp_init(adapter);
+}
@@ -4,9 +4,19 @@
#ifndef _IAVF_PTP_H_
#define _IAVF_PTP_H_
+#include <linux/ptp_clock_kernel.h>
+
/* fields used for PTP support */
struct iavf_ptp {
struct virtchnl_ptp_caps hw_caps;
+ bool initialized;
+ struct ptp_clock_info info;
+ struct ptp_clock *clock;
};
+void iavf_ptp_init(struct iavf_adapter *adapter);
+void iavf_ptp_release(struct iavf_adapter *adapter);
+void iavf_ptp_process_caps(struct iavf_adapter *adapter);
+bool iavf_ptp_cap_supported(struct iavf_adapter *adapter, u32 cap);
+
#endif /* _IAVF_PTP_H_ */
@@ -2511,6 +2511,8 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter,
case VIRTCHNL_OP_1588_PTP_GET_CAPS:
memcpy(&adapter->ptp.hw_caps, msg,
min_t(u16, msglen, sizeof(adapter->ptp.hw_caps)));
+ /* process any state change needed due to new capabilities */
+ iavf_ptp_process_caps(adapter);
break;
case VIRTCHNL_OP_ENABLE_QUEUES:
/* enable transmits */