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 struct gdma_context *gc;
16 int err;
17
18 mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
19 gc = mdev_to_gc(mdev);
20
21 if (udata->inlen < sizeof(ucmd))
22 return -EINVAL;
23
24 if (attr->comp_vector > gc->max_num_queues)
25 return -EINVAL;
26
27 cq->comp_vector = attr->comp_vector;
28
29 err = ib_copy_from_udata(dest: &ucmd, udata, min(sizeof(ucmd), udata->inlen));
30 if (err) {
31 ibdev_dbg(ibdev,
32 "Failed to copy from udata for create cq, %d\n", err);
33 return err;
34 }
35
36 if (attr->cqe > mdev->adapter_caps.max_qp_wr) {
37 ibdev_dbg(ibdev, "CQE %d exceeding limit\n", attr->cqe);
38 return -EINVAL;
39 }
40
41 cq->cqe = attr->cqe;
42 cq->umem = ib_umem_get(device: ibdev, addr: ucmd.buf_addr, size: cq->cqe * COMP_ENTRY_SIZE,
43 access: IB_ACCESS_LOCAL_WRITE);
44 if (IS_ERR(ptr: cq->umem)) {
45 err = PTR_ERR(ptr: cq->umem);
46 ibdev_dbg(ibdev, "Failed to get umem for create cq, err %d\n",
47 err);
48 return err;
49 }
50
51 err = mana_ib_create_zero_offset_dma_region(dev: mdev, umem: cq->umem, gdma_region: &cq->gdma_region);
52 if (err) {
53 ibdev_dbg(ibdev,
54 "Failed to create dma region for create cq, %d\n",
55 err);
56 goto err_release_umem;
57 }
58
59 ibdev_dbg(ibdev,
60 "create_dma_region ret %d gdma_region 0x%llx\n",
61 err, cq->gdma_region);
62
63 /*
64 * The CQ ID is not known at this time. The ID is generated at create_qp
65 */
66 cq->id = INVALID_QUEUE_ID;
67
68 return 0;
69
70err_release_umem:
71 ib_umem_release(umem: cq->umem);
72 return err;
73}
74
75int mana_ib_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
76{
77 struct mana_ib_cq *cq = container_of(ibcq, struct mana_ib_cq, ibcq);
78 struct ib_device *ibdev = ibcq->device;
79 struct mana_ib_dev *mdev;
80 struct gdma_context *gc;
81 int err;
82
83 mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
84 gc = mdev_to_gc(mdev);
85
86 err = mana_ib_gd_destroy_dma_region(dev: mdev, gdma_region: cq->gdma_region);
87 if (err) {
88 ibdev_dbg(ibdev,
89 "Failed to destroy dma region, %d\n", err);
90 return err;
91 }
92
93 if (cq->id != INVALID_QUEUE_ID) {
94 kfree(objp: gc->cq_table[cq->id]);
95 gc->cq_table[cq->id] = NULL;
96 }
97
98 ib_umem_release(umem: cq->umem);
99
100 return 0;
101}
102
103static void mana_ib_cq_handler(void *ctx, struct gdma_queue *gdma_cq)
104{
105 struct mana_ib_cq *cq = ctx;
106
107 if (cq->ibcq.comp_handler)
108 cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
109}
110
111int mana_ib_install_cq_cb(struct mana_ib_dev *mdev, struct mana_ib_cq *cq)
112{
113 struct gdma_context *gc = mdev_to_gc(mdev);
114 struct gdma_queue *gdma_cq;
115
116 /* Create CQ table entry */
117 WARN_ON(gc->cq_table[cq->id]);
118 gdma_cq = kzalloc(size: sizeof(*gdma_cq), GFP_KERNEL);
119 if (!gdma_cq)
120 return -ENOMEM;
121
122 gdma_cq->cq.context = cq;
123 gdma_cq->type = GDMA_CQ;
124 gdma_cq->cq.callback = mana_ib_cq_handler;
125 gdma_cq->id = cq->id;
126 gc->cq_table[cq->id] = gdma_cq;
127 return 0;
128}
129

source code of linux/drivers/infiniband/hw/mana/cq.c