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Date: Wed, 27 Mar 2024 09:25:32 -0400
From: Mateusz Polchlopek <mateusz.polchlopek@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
Jacob Keller <jacob.e.keller@...el.com>,
Wojciech Drewek <wojciech.drewek@...el.com>,
Mateusz Polchlopek <mateusz.polchlopek@...el.com>
Subject: [Intel-wired-lan] [PATCH iwl-next v2 01/12] virtchnl: add support for enabling PTP on iAVF
From: Jacob Keller <jacob.e.keller@...el.com>
Add support for allowing a VF to enable PTP feature - Rx timestamps
The new capability is gated by VIRTCHNL_VF_CAP_PTP, which must be
set by the VF to request access to the new operations. In addition, the
VIRTCHNL_OP_1588_PTP_CAPS command is used to determine the specific
capabilities available to the VF.
This support includes the following additional capabilities:
* Rx timestamps enabled in the Rx queues (when using flexible advanced
descriptors)
* Read access to PHC time over virtchnl using
VIRTCHNL_OP_1588_PTP_GET_TIME
Extra space is reserved in most structures to allow for future
extension (like set clock, Tx timestamps). Additional opcode numbers
are reserved and space in the virtchnl_ptp_caps structure is
specifically set aside for this.
Additionally, each structure has some space reserved for future
extensions to allow some flexibility.
Reviewed-by: Wojciech Drewek <wojciech.drewek@...el.com>
Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Signed-off-by: Mateusz Polchlopek <mateusz.polchlopek@...el.com>
---
include/linux/avf/virtchnl.h | 66 ++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)
diff --git a/include/linux/avf/virtchnl.h b/include/linux/avf/virtchnl.h
index 8e177b67e82f..5003d29e3f5b 100644
--- a/include/linux/avf/virtchnl.h
+++ b/include/linux/avf/virtchnl.h
@@ -151,6 +151,9 @@ enum virtchnl_ops {
VIRTCHNL_OP_DISABLE_VLAN_STRIPPING_V2 = 55,
VIRTCHNL_OP_ENABLE_VLAN_INSERTION_V2 = 56,
VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2 = 57,
+ /* opcode 58 and 59 are reserved */
+ VIRTCHNL_OP_1588_PTP_GET_CAPS = 60,
+ VIRTCHNL_OP_1588_PTP_GET_TIME = 61,
VIRTCHNL_OP_MAX,
};
@@ -260,6 +263,7 @@ VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_vsi_resource);
#define VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC BIT(26)
#define VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF BIT(27)
#define VIRTCHNL_VF_OFFLOAD_FDIR_PF BIT(28)
+#define VIRTCHNL_VF_CAP_PTP BIT(31)
#define VF_BASE_MODE_OFFLOADS (VIRTCHNL_VF_OFFLOAD_L2 | \
VIRTCHNL_VF_OFFLOAD_VLAN | \
@@ -1405,6 +1409,62 @@ struct virtchnl_fdir_del {
VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_fdir_del);
+#define VIRTCHNL_1588_PTP_CAP_RX_TSTAMP BIT(1)
+#define VIRTCHNL_1588_PTP_CAP_READ_PHC BIT(2)
+
+/**
+ * struct virtchnl_ptp_caps
+ *
+ * Structure that defines the PTP capabilities available to the VF. The VF
+ * sends VIRTCHNL_OP_1588_PTP_GET_CAPS, and must fill in the ptp_caps field
+ * indicating what capabilities it is requesting. The PF will respond with the
+ * same message with the virtchnl_ptp_caps structure indicating what is
+ * enabled for the VF.
+ *
+ * @caps: On send, VF sets what capabilities it requests. On reply, PF
+ * indicates what has been enabled for this VF. The PF shall not set
+ * bits which were not requested by the VF.
+ * @rsvd: Reserved bits for future extension.
+ *
+ * PTP capabilities
+ *
+ * VIRTCHNL_1588_PTP_CAP_RX_TSTAMP indicates that the VF receive queues have
+ * receive timestamps enabled in the flexible descriptors. Note that this
+ * requires a VF to also negotiate to enable advanced flexible descriptors in
+ * the receive path instead of the default legacy descriptor format.
+ *
+ * VIRTCHNL_1588_PTP_CAP_READ_PHC indicates that the VF may read the PHC time
+ * via the VIRTCHNL_OP_1588_PTP_GET_TIME command.
+ *
+ * Note that in the future, additional capability flags may be added which
+ * indicate additional extended support. All fields marked as reserved by this
+ * header will be set to zero. VF implementations should verify this to ensure
+ * that future extensions do not break compatibility.
+ */
+struct virtchnl_ptp_caps {
+ u32 caps;
+ u8 rsvd[44];
+};
+VIRTCHNL_CHECK_STRUCT_LEN(48, virtchnl_ptp_caps);
+
+/**
+ * struct virtchnl_phc_time
+ * @time: PHC time in nanoseconds
+ * @rsvd: Reserved for future extension
+ *
+ * Structure received with VIRTCHNL_OP_1588_PTP_GET_TIME. Contains the 64bits
+ * of PHC clock time in * nanoseconds.
+ *
+ * VIRTCHNL_OP_1588_PTP_GET_TIME may be sent to request the current time of
+ * the PHC. This op is available in case direct access via the PHC registers
+ * is not available.
+ */
+struct virtchnl_phc_time {
+ u64 time;
+ u8 rsvd[8];
+};
+VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_phc_time);
+
#define __vss_byone(p, member, count, old) \
(struct_size(p, member, count) + (old - 1 - struct_size(p, member, 0)))
@@ -1626,6 +1686,12 @@ virtchnl_vc_validate_vf_msg(struct virtchnl_version_info *ver, u32 v_opcode,
case VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2:
valid_len = sizeof(struct virtchnl_vlan_setting);
break;
+ case VIRTCHNL_OP_1588_PTP_GET_CAPS:
+ valid_len = sizeof(struct virtchnl_ptp_caps);
+ break;
+ case VIRTCHNL_OP_1588_PTP_GET_TIME:
+ valid_len = sizeof(struct virtchnl_phc_time);
+ break;
/* These are always errors coming from the VF. */
case VIRTCHNL_OP_EVENT:
case VIRTCHNL_OP_UNKNOWN:
--
2.38.1
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