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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
#include <linux/mlx5/driver.h>
#include <net/devlink.h>
#include "sh_devlink.h"
static const struct devlink_ops mlx5_shd_ops = {
};
int mlx5_shd_init(struct mlx5_core_dev *dev)
{
u8 *vpd_data __free(kfree) = NULL;
struct pci_dev *pdev = dev->pdev;
unsigned int vpd_size, kw_len;
struct devlink *devlink;
char *sn, *end;
int start;
int err;
if (!mlx5_core_is_pf(dev))
return 0;
vpd_data = pci_vpd_alloc(pdev, &vpd_size);
if (IS_ERR(vpd_data)) {
err = PTR_ERR(vpd_data);
return err == -ENODEV ? 0 : err;
}
start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size, "V3", &kw_len);
if (start < 0) {
/* Fall-back to SN for older devices. */
start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
PCI_VPD_RO_KEYWORD_SERIALNO, &kw_len);
if (start < 0)
return 0; /* No usable serial number found, ignore. */
}
sn = kstrndup(vpd_data + start, kw_len, GFP_KERNEL);
if (!sn)
return -ENOMEM;
/* Firmware may return spaces at the end of the string, strip it. */
end = strchrnul(sn, ' ');
*end = '\0';
/* Get or create shared devlink instance */
devlink = devlink_shd_get(sn, &mlx5_shd_ops, 0, pdev->dev.driver);
kfree(sn);
if (!devlink)
return -ENOMEM;
dev->shd = devlink;
return 0;
}
void mlx5_shd_uninit(struct mlx5_core_dev *dev)
{
if (!dev->shd)
return;
devlink_shd_put(dev->shd);
}
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