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
 8int mana_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 9		      struct ib_udata *udata)
10{
11	struct mana_ib_cq *cq = container_of(ibcq, struct mana_ib_cq, ibcq);
12	struct ib_device *ibdev = ibcq->device;
13	struct mana_ib_create_cq ucmd = {};
14	struct mana_ib_dev *mdev;
15	int err;
16
17	mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
18
19	if (udata->inlen < sizeof(ucmd))
20		return -EINVAL;
21
22	err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));
23	if (err) {
24		ibdev_dbg(ibdev,
25			  "Failed to copy from udata for create cq, %d\n", err);
26		return err;
27	}
28
29	if (attr->cqe > MAX_SEND_BUFFERS_PER_QUEUE) {
30		ibdev_dbg(ibdev, "CQE %d exceeding limit\n", attr->cqe);
31		return -EINVAL;
32	}
33
34	cq->cqe = attr->cqe;
35	cq->umem = ib_umem_get(ibdev, ucmd.buf_addr, cq->cqe * COMP_ENTRY_SIZE,
36			       IB_ACCESS_LOCAL_WRITE);
37	if (IS_ERR(cq->umem)) {
38		err = PTR_ERR(cq->umem);
39		ibdev_dbg(ibdev, "Failed to get umem for create cq, err %d\n",
40			  err);
41		return err;
42	}
43
44	err = mana_ib_gd_create_dma_region(mdev, cq->umem, &cq->gdma_region);
45	if (err) {
46		ibdev_dbg(ibdev,
47			  "Failed to create dma region for create cq, %d\n",
48			  err);
49		goto err_release_umem;
50	}
51
52	ibdev_dbg(ibdev,
53		  "mana_ib_gd_create_dma_region ret %d gdma_region 0x%llx\n",
54		  err, cq->gdma_region);
55
56	/*
57	 * The CQ ID is not known at this time. The ID is generated at create_qp
58	 */
59
60	return 0;
61
62err_release_umem:
63	ib_umem_release(cq->umem);
64	return err;
65}
66
67int mana_ib_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
68{
69	struct mana_ib_cq *cq = container_of(ibcq, struct mana_ib_cq, ibcq);
70	struct ib_device *ibdev = ibcq->device;
71	struct mana_ib_dev *mdev;
72
73	mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
74
75	mana_ib_gd_destroy_dma_region(mdev, cq->gdma_region);
76	ib_umem_release(cq->umem);
77
78	return 0;
79}