summaryrefslogtreecommitdiff
path: root/drivers/infiniband/sw/rxe/rxe_srq.c
blob: 0c0721f0435729e267257e6028b72c4f4365ef02 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
 */

#include <linux/vmalloc.h>
#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"

int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
		     struct ib_srq_attr *attr, enum ib_srq_attr_mask mask)
{
	if (srq && srq->error) {
		pr_warn("srq in error state\n");
		goto err1;
	}

	if (mask & IB_SRQ_MAX_WR) {
		if (attr->max_wr > rxe->attr.max_srq_wr) {
			pr_warn("max_wr(%d) > max_srq_wr(%d)\n",
				attr->max_wr, rxe->attr.max_srq_wr);
			goto err1;
		}

		if (attr->max_wr <= 0) {
			pr_warn("max_wr(%d) <= 0\n", attr->max_wr);
			goto err1;
		}

		if (srq && srq->limit && (attr->max_wr < srq->limit)) {
			pr_warn("max_wr (%d) < srq->limit (%d)\n",
				attr->max_wr, srq->limit);
			goto err1;
		}

		if (attr->max_wr < RXE_MIN_SRQ_WR)
			attr->max_wr = RXE_MIN_SRQ_WR;
	}

	if (mask & IB_SRQ_LIMIT) {
		if (attr->srq_limit > rxe->attr.max_srq_wr) {
			pr_warn("srq_limit(%d) > max_srq_wr(%d)\n",
				attr->srq_limit, rxe->attr.max_srq_wr);
			goto err1;
		}

		if (srq && (attr->srq_limit > srq->rq.queue->buf->index_mask)) {
			pr_warn("srq_limit (%d) > cur limit(%d)\n",
				attr->srq_limit,
				 srq->rq.queue->buf->index_mask);
			goto err1;
		}
	}

	if (mask == IB_SRQ_INIT_MASK) {
		if (attr->max_sge > rxe->attr.max_srq_sge) {
			pr_warn("max_sge(%d) > max_srq_sge(%d)\n",
				attr->max_sge, rxe->attr.max_srq_sge);
			goto err1;
		}

		if (attr->max_sge < RXE_MIN_SRQ_SGE)
			attr->max_sge = RXE_MIN_SRQ_SGE;
	}

	return 0;

err1:
	return -EINVAL;
}

int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
		      struct ib_srq_init_attr *init, struct ib_udata *udata,
		      struct rxe_create_srq_resp __user *uresp)
{
	int err;
	int srq_wqe_size;
	struct rxe_queue *q;
	enum queue_type type;

	srq->ibsrq.event_handler	= init->event_handler;
	srq->ibsrq.srq_context		= init->srq_context;
	srq->limit		= init->attr.srq_limit;
	srq->srq_num		= srq->elem.index;
	srq->rq.max_wr		= init->attr.max_wr;
	srq->rq.max_sge		= init->attr.max_sge;

	srq_wqe_size		= rcv_wqe_size(srq->rq.max_sge);

	spin_lock_init(&srq->rq.producer_lock);
	spin_lock_init(&srq->rq.consumer_lock);

	type = QUEUE_TYPE_FROM_CLIENT;
	q = rxe_queue_init(rxe, &srq->rq.max_wr,
			srq_wqe_size, type);
	if (!q) {
		pr_warn("unable to allocate queue for srq\n");
		return -ENOMEM;
	}

	srq->rq.queue = q;

	err = do_mmap_info(rxe, uresp ? &uresp->mi : NULL, udata, q->buf,
			   q->buf_size, &q->ip);
	if (err) {
		vfree(q->buf);
		kfree(q);
		return err;
	}

	if (uresp) {
		if (copy_to_user(&uresp->srq_num, &srq->srq_num,
				 sizeof(uresp->srq_num))) {
			rxe_queue_cleanup(q);
			return -EFAULT;
		}
	}

	return 0;
}

int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
		      struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
		      struct rxe_modify_srq_cmd *ucmd, struct ib_udata *udata)
{
	int err;
	struct rxe_queue *q = srq->rq.queue;
	struct mminfo __user *mi = NULL;

	if (mask & IB_SRQ_MAX_WR) {
		/*
		 * This is completely screwed up, the response is supposed to
		 * be in the outbuf not like this.
		 */
		mi = u64_to_user_ptr(ucmd->mmap_info_addr);

		err = rxe_queue_resize(q, &attr->max_wr,
				       rcv_wqe_size(srq->rq.max_sge), udata, mi,
				       &srq->rq.producer_lock,
				       &srq->rq.consumer_lock);
		if (err)
			goto err2;
	}

	if (mask & IB_SRQ_LIMIT)
		srq->limit = attr->srq_limit;

	return 0;

err2:
	rxe_queue_cleanup(q);
	srq->rq.queue = NULL;
	return err;
}