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f290d48f02
Enable initial support for the devlink interface with the ixd driver. The
ixd hardware is a single function PCIe device. So, the PCIe adapter gets
its own devlink instance to manage device-wide resources or configuration.
$ devlink dev show
pci/0000:83:00.6
$ devlink dev info pci/0000:83:00.6
pci/0000:83:00.6:
driver ixd
serial_number 00-a0-c9-ff-ff-23-45-67
versions:
fixed:
device.type MEV
running:
fw.mgmt.api 2.0
Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Tested-by: Bharath R <Bharath.r@intel.com>
Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2025, Intel Corporation. */
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#include "ixd.h"
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#include "ixd_devlink.h"
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#define IXD_DEVLINK_INFO_LEN 128
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/**
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* ixd_fill_dsn - Get the serial number for the ixd device
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* @adapter: adapter to query
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* @buf: storage buffer for the info request
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*/
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static void ixd_fill_dsn(struct ixd_adapter *adapter, char *buf)
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{
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u8 dsn[8];
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/* Copy the DSN into an array in Big Endian format */
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put_unaligned_be64(pci_get_dsn(adapter->cp_ctx.mmio_info.pdev), dsn);
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snprintf(buf, IXD_DEVLINK_INFO_LEN, "%8phD", dsn);
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}
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/**
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* ixd_fill_device_name - Get the name of the underlying hardware
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* @adapter: adapter to query
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* @buf: storage buffer for the info request
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* @buf_size: size of the storage buffer
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*/
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static void ixd_fill_device_name(struct ixd_adapter *adapter, char *buf,
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size_t buf_size)
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{
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if (adapter->caps.device_type == cpu_to_le32(VIRTCHNL2_MEV_DEVICE))
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snprintf(buf, buf_size, "%s", "MEV");
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else
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snprintf(buf, buf_size, "%s", "UNKNOWN");
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}
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/**
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* ixd_devlink_info_get - .info_get devlink handler
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* @devlink: devlink instance structure
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* @req: the devlink info request
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* @extack: extended netdev ack structure
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*
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* Callback for the devlink .info_get operation. Reports information about the
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* device.
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*
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* Return: zero on success or an error code on failure.
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*/
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static int ixd_devlink_info_get(struct devlink *devlink,
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struct devlink_info_req *req,
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struct netlink_ext_ack *extack)
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{
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struct ixd_adapter *adapter = devlink_priv(devlink);
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char buf[IXD_DEVLINK_INFO_LEN];
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int err;
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ixd_fill_dsn(adapter, buf);
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err = devlink_info_serial_number_put(req, buf);
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if (err)
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return err;
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ixd_fill_device_name(adapter, buf, IXD_DEVLINK_INFO_LEN);
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err = devlink_info_version_fixed_put(req, "device.type", buf);
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if (err)
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return err;
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snprintf(buf, sizeof(buf), "%u.%u",
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adapter->vc_ver.major, adapter->vc_ver.minor);
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return devlink_info_version_running_put(req,
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DEVLINK_INFO_VERSION_GENERIC_FW_MGMT_API,
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buf);
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}
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static const struct devlink_ops ixd_devlink_ops = {
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.info_get = ixd_devlink_info_get,
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};
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/**
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* ixd_adapter_alloc - Allocate devlink and return adapter pointer
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* @dev: the device to allocate for
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*
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* Allocate a devlink instance for this device and return the private area as
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* the adapter structure.
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*
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* Return: adapter structure on success, NULL on failure
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*/
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struct ixd_adapter *ixd_adapter_alloc(struct device *dev)
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{
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struct devlink *devlink;
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devlink = devlink_alloc(&ixd_devlink_ops, sizeof(struct ixd_adapter),
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dev);
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if (!devlink)
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return NULL;
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return devlink_priv(devlink);
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}
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