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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */
#include <linux/kernel.h>
#include "ionic.h"
#include "ionic_lif.h"
#include "ionic_aux.h"
static DEFINE_IDA(aux_ida);
static void ionic_auxbus_release(struct device *dev)
{
struct ionic_aux_dev *ionic_adev;
ionic_adev = container_of(dev, struct ionic_aux_dev, adev.dev);
ida_free(&aux_ida, ionic_adev->adev.id);
kfree(ionic_adev);
}
int ionic_auxbus_register(struct ionic_lif *lif)
{
struct ionic_aux_dev *ionic_adev;
struct auxiliary_device *aux_dev;
int err, id;
if (!(le64_to_cpu(lif->ionic->ident.lif.capabilities) & IONIC_LIF_CAP_RDMA))
return 0;
ionic_adev = kzalloc(sizeof(*ionic_adev), GFP_KERNEL);
if (!ionic_adev)
return -ENOMEM;
aux_dev = &ionic_adev->adev;
id = ida_alloc(&aux_ida, GFP_KERNEL);
if (id < 0) {
dev_err(lif->ionic->dev, "Failed to allocate aux id: %d\n", id);
kfree(ionic_adev);
return id;
}
aux_dev->id = id;
aux_dev->name = "rdma";
aux_dev->dev.parent = &lif->ionic->pdev->dev;
aux_dev->dev.release = ionic_auxbus_release;
ionic_adev->lif = lif;
err = auxiliary_device_init(aux_dev);
if (err) {
dev_err(lif->ionic->dev, "Failed to initialize %s aux device: %d\n",
aux_dev->name, err);
ida_free(&aux_ida, id);
kfree(ionic_adev);
return err;
}
err = auxiliary_device_add(aux_dev);
if (err) {
dev_err(lif->ionic->dev, "Failed to add %s aux device: %d\n",
aux_dev->name, err);
auxiliary_device_uninit(aux_dev);
return err;
}
lif->ionic_adev = ionic_adev;
return 0;
}
void ionic_auxbus_unregister(struct ionic_lif *lif)
{
mutex_lock(&lif->adev_lock);
if (!lif->ionic_adev)
goto out;
auxiliary_device_delete(&lif->ionic_adev->adev);
auxiliary_device_uninit(&lif->ionic_adev->adev);
lif->ionic_adev = NULL;
out:
mutex_unlock(&lif->adev_lock);
}
void ionic_request_rdma_reset(struct ionic_lif *lif)
{
struct ionic *ionic = lif->ionic;
int err;
union ionic_dev_cmd cmd = {
.cmd.opcode = IONIC_CMD_RDMA_RESET_LIF,
.cmd.lif_index = cpu_to_le16(lif->index),
};
mutex_lock(&ionic->dev_cmd_lock);
ionic_dev_cmd_go(&ionic->idev, &cmd);
err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
mutex_unlock(&ionic->dev_cmd_lock);
if (err)
pr_warn("%s request_reset: error %d\n", __func__, err);
}
EXPORT_SYMBOL_NS(ionic_request_rdma_reset, "NET_IONIC");
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