Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */
3
4#include <linux/kernel.h>
5#include "ionic.h"
6#include "ionic_lif.h"
7#include "ionic_aux.h"
8
9static DEFINE_IDA(aux_ida);
10
11static void ionic_auxbus_release(struct device *dev)
12{
13 struct ionic_aux_dev *ionic_adev;
14
15 ionic_adev = container_of(dev, struct ionic_aux_dev, adev.dev);
16 ida_free(&aux_ida, ionic_adev->adev.id);
17 kfree(ionic_adev);
18}
19
20int ionic_auxbus_register(struct ionic_lif *lif)
21{
22 struct ionic_aux_dev *ionic_adev;
23 struct auxiliary_device *aux_dev;
24 int err, id;
25
26 if (!(le64_to_cpu(lif->ionic->ident.lif.capabilities) & IONIC_LIF_CAP_RDMA))
27 return 0;
28
29 ionic_adev = kzalloc(sizeof(*ionic_adev), GFP_KERNEL);
30 if (!ionic_adev)
31 return -ENOMEM;
32
33 aux_dev = &ionic_adev->adev;
34
35 id = ida_alloc(&aux_ida, GFP_KERNEL);
36 if (id < 0) {
37 dev_err(lif->ionic->dev, "Failed to allocate aux id: %d\n", id);
38 kfree(ionic_adev);
39 return id;
40 }
41
42 aux_dev->id = id;
43 aux_dev->name = "rdma";
44 aux_dev->dev.parent = &lif->ionic->pdev->dev;
45 aux_dev->dev.release = ionic_auxbus_release;
46 ionic_adev->lif = lif;
47 err = auxiliary_device_init(aux_dev);
48 if (err) {
49 dev_err(lif->ionic->dev, "Failed to initialize %s aux device: %d\n",
50 aux_dev->name, err);
51 ida_free(&aux_ida, id);
52 kfree(ionic_adev);
53 return err;
54 }
55
56 err = auxiliary_device_add(aux_dev);
57 if (err) {
58 dev_err(lif->ionic->dev, "Failed to add %s aux device: %d\n",
59 aux_dev->name, err);
60 auxiliary_device_uninit(aux_dev);
61 return err;
62 }
63
64 lif->ionic_adev = ionic_adev;
65 return 0;
66}
67
68void ionic_auxbus_unregister(struct ionic_lif *lif)
69{
70 mutex_lock(&lif->adev_lock);
71 if (!lif->ionic_adev)
72 goto out;
73
74 auxiliary_device_delete(&lif->ionic_adev->adev);
75 auxiliary_device_uninit(&lif->ionic_adev->adev);
76
77 lif->ionic_adev = NULL;
78out:
79 mutex_unlock(&lif->adev_lock);
80}
81
82void ionic_request_rdma_reset(struct ionic_lif *lif)
83{
84 struct ionic *ionic = lif->ionic;
85 int err;
86
87 union ionic_dev_cmd cmd = {
88 .cmd.opcode = IONIC_CMD_RDMA_RESET_LIF,
89 .cmd.lif_index = cpu_to_le16(lif->index),
90 };
91
92 mutex_lock(&ionic->dev_cmd_lock);
93
94 ionic_dev_cmd_go(&ionic->idev, &cmd);
95 err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
96
97 mutex_unlock(&ionic->dev_cmd_lock);
98
99 if (err)
100 pr_warn("%s request_reset: error %d\n", __func__, err);
101}
102EXPORT_SYMBOL_NS(ionic_request_rdma_reset, "NET_IONIC");