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The Ethernet driver holds the privilege to execute the device commands. Export the function to execute RDMA reset command for use by RDMA driver. Reviewed-by: Shannon Nelson <shannon.nelson@amd.com> Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com> Link: https://patch.msgid.link/20250903061606.4139957-5-abhijit.gangurde@amd.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */
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#include <linux/kernel.h>
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#include "ionic.h"
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#include "ionic_lif.h"
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#include "ionic_aux.h"
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static DEFINE_IDA(aux_ida);
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static void ionic_auxbus_release(struct device *dev)
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{
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struct ionic_aux_dev *ionic_adev;
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ionic_adev = container_of(dev, struct ionic_aux_dev, adev.dev);
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ida_free(&aux_ida, ionic_adev->adev.id);
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kfree(ionic_adev);
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}
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int ionic_auxbus_register(struct ionic_lif *lif)
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{
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struct ionic_aux_dev *ionic_adev;
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struct auxiliary_device *aux_dev;
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int err, id;
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if (!(le64_to_cpu(lif->ionic->ident.lif.capabilities) & IONIC_LIF_CAP_RDMA))
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return 0;
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ionic_adev = kzalloc(sizeof(*ionic_adev), GFP_KERNEL);
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if (!ionic_adev)
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return -ENOMEM;
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aux_dev = &ionic_adev->adev;
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id = ida_alloc(&aux_ida, GFP_KERNEL);
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if (id < 0) {
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dev_err(lif->ionic->dev, "Failed to allocate aux id: %d\n", id);
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kfree(ionic_adev);
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return id;
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}
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aux_dev->id = id;
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aux_dev->name = "rdma";
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aux_dev->dev.parent = &lif->ionic->pdev->dev;
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aux_dev->dev.release = ionic_auxbus_release;
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ionic_adev->lif = lif;
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err = auxiliary_device_init(aux_dev);
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if (err) {
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dev_err(lif->ionic->dev, "Failed to initialize %s aux device: %d\n",
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aux_dev->name, err);
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ida_free(&aux_ida, id);
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kfree(ionic_adev);
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return err;
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}
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err = auxiliary_device_add(aux_dev);
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if (err) {
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dev_err(lif->ionic->dev, "Failed to add %s aux device: %d\n",
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aux_dev->name, err);
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auxiliary_device_uninit(aux_dev);
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return err;
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}
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lif->ionic_adev = ionic_adev;
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return 0;
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}
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void ionic_auxbus_unregister(struct ionic_lif *lif)
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{
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mutex_lock(&lif->adev_lock);
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if (!lif->ionic_adev)
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goto out;
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auxiliary_device_delete(&lif->ionic_adev->adev);
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auxiliary_device_uninit(&lif->ionic_adev->adev);
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lif->ionic_adev = NULL;
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out:
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mutex_unlock(&lif->adev_lock);
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}
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void ionic_request_rdma_reset(struct ionic_lif *lif)
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{
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struct ionic *ionic = lif->ionic;
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int err;
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union ionic_dev_cmd cmd = {
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.cmd.opcode = IONIC_CMD_RDMA_RESET_LIF,
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.cmd.lif_index = cpu_to_le16(lif->index),
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};
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mutex_lock(&ionic->dev_cmd_lock);
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ionic_dev_cmd_go(&ionic->idev, &cmd);
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err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
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mutex_unlock(&ionic->dev_cmd_lock);
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if (err)
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pr_warn("%s request_reset: error %d\n", __func__, err);
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}
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EXPORT_SYMBOL_NS(ionic_request_rdma_reset, "NET_IONIC");
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