xref: /openbmc/linux/drivers/infiniband/hw/mana/cq.c (revision 724ba675)
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 
8 int 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 
62 err_release_umem:
63 	ib_umem_release(cq->umem);
64 	return err;
65 }
66 
67 int 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 }
80