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virtchnl: add support for enabling PTP on iAVF

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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.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Mateusz Polchlopek <mateusz.polchlopek@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Jacob Keller
2024-11-06 12:37:18 -05:00
committed by Tony Nguyen
parent 7a7e019713
commit 27ebd8bf9e
1 changed files with 66 additions and 1 deletions
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67
include/linux/avf/virtchnl.h
View File

@@ -154,7 +154,10 @@ 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 57 - 65 are reserved */
/* opcode 58 and 59 are reserved */
VIRTCHNL_OP_1588_PTP_GET_CAPS = 60,
VIRTCHNL_OP_1588_PTP_GET_TIME = 61,
/* opcode 62 - 65 are reserved */
VIRTCHNL_OP_GET_QOS_CAPS = 66,
/* opcode 68 through 111 are reserved */
VIRTCHNL_OP_CONFIG_QUEUE_BW = 112,
@@ -270,6 +273,7 @@ VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_vsi_resource);
#define VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF BIT(27)
#define VIRTCHNL_VF_OFFLOAD_FDIR_PF BIT(28)
#define VIRTCHNL_VF_OFFLOAD_QOS BIT(29)
#define VIRTCHNL_VF_CAP_PTP BIT(31)
#define VF_BASE_MODE_OFFLOADS (VIRTCHNL_VF_OFFLOAD_L2 | \
VIRTCHNL_VF_OFFLOAD_VLAN | \
@@ -1425,6 +1429,61 @@ 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 - Defines the PTP caps available to 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.
*
* 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.
*
* 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 - Contains the 64bits of PHC clock time in ns.
* @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);
struct virtchnl_shaper_bw {
/* Unit is Kbps */
u32 committed;
@@ -1757,6 +1816,12 @@ virtchnl_vc_validate_vf_msg(struct virtchnl_version_info *ver, u32 v_opcode,
}
}
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: