1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2022, Microsoft Corporation. All rights reserved.
4 */
5
6#include "mana_ib.h"
7
8struct ib_wq *mana_ib_create_wq(struct ib_pd *pd,
9				struct ib_wq_init_attr *init_attr,
10				struct ib_udata *udata)
11{
12	struct mana_ib_dev *mdev =
13		container_of(pd->device, struct mana_ib_dev, ib_dev);
14	struct mana_ib_create_wq ucmd = {};
15	struct mana_ib_wq *wq;
16	struct ib_umem *umem;
17	int err;
18
19	if (udata->inlen < sizeof(ucmd))
20		return ERR_PTR(-EINVAL);
21
22	err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));
23	if (err) {
24		ibdev_dbg(&mdev->ib_dev,
25			  "Failed to copy from udata for create wq, %d\n", err);
26		return ERR_PTR(err);
27	}
28
29	wq = kzalloc(sizeof(*wq), GFP_KERNEL);
30	if (!wq)
31		return ERR_PTR(-ENOMEM);
32
33	ibdev_dbg(&mdev->ib_dev, "ucmd wq_buf_addr 0x%llx\n", ucmd.wq_buf_addr);
34
35	umem = ib_umem_get(pd->device, ucmd.wq_buf_addr, ucmd.wq_buf_size,
36			   IB_ACCESS_LOCAL_WRITE);
37	if (IS_ERR(umem)) {
38		err = PTR_ERR(umem);
39		ibdev_dbg(&mdev->ib_dev,
40			  "Failed to get umem for create wq, err %d\n", err);
41		goto err_free_wq;
42	}
43
44	wq->umem = umem;
45	wq->wqe = init_attr->max_wr;
46	wq->wq_buf_size = ucmd.wq_buf_size;
47	wq->rx_object = INVALID_MANA_HANDLE;
48
49	err = mana_ib_gd_create_dma_region(mdev, wq->umem, &wq->gdma_region);
50	if (err) {
51		ibdev_dbg(&mdev->ib_dev,
52			  "Failed to create dma region for create wq, %d\n",
53			  err);
54		goto err_release_umem;
55	}
56
57	ibdev_dbg(&mdev->ib_dev,
58		  "mana_ib_gd_create_dma_region ret %d gdma_region 0x%llx\n",
59		  err, wq->gdma_region);
60
61	/* WQ ID is returned at wq_create time, doesn't know the value yet */
62
63	return &wq->ibwq;
64
65err_release_umem:
66	ib_umem_release(umem);
67
68err_free_wq:
69	kfree(wq);
70
71	return ERR_PTR(err);
72}
73
74int mana_ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
75		      u32 wq_attr_mask, struct ib_udata *udata)
76{
77	/* modify_wq is not supported by this version of the driver */
78	return -EOPNOTSUPP;
79}
80
81int mana_ib_destroy_wq(struct ib_wq *ibwq, struct ib_udata *udata)
82{
83	struct mana_ib_wq *wq = container_of(ibwq, struct mana_ib_wq, ibwq);
84	struct ib_device *ib_dev = ibwq->device;
85	struct mana_ib_dev *mdev;
86
87	mdev = container_of(ib_dev, struct mana_ib_dev, ib_dev);
88
89	mana_ib_gd_destroy_dma_region(mdev, wq->gdma_region);
90	ib_umem_release(wq->umem);
91
92	kfree(wq);
93
94	return 0;
95}
96
97int mana_ib_create_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_table,
98				 struct ib_rwq_ind_table_init_attr *init_attr,
99				 struct ib_udata *udata)
100{
101	/*
102	 * There is no additional data in ind_table to be maintained by this
103	 * driver, do nothing
104	 */
105	return 0;
106}
107
108int mana_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_tbl)
109{
110	/*
111	 * There is no additional data in ind_table to be maintained by this
112	 * driver, do nothing
113	 */
114	return 0;
115}
116