x86/boot/64: Move 5-level paging global variable assignments back
[sfrench/cifs-2.6.git] / drivers / infiniband / sw / rxe / rxe_cq.c
1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /*
3  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
4  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
5  */
6 #include <linux/vmalloc.h>
7 #include "rxe.h"
8 #include "rxe_loc.h"
9 #include "rxe_queue.h"
10
11 int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq,
12                     int cqe, int comp_vector)
13 {
14         int count;
15
16         if (cqe <= 0) {
17                 rxe_dbg_dev(rxe, "cqe(%d) <= 0\n", cqe);
18                 goto err1;
19         }
20
21         if (cqe > rxe->attr.max_cqe) {
22                 rxe_dbg_dev(rxe, "cqe(%d) > max_cqe(%d)\n",
23                                 cqe, rxe->attr.max_cqe);
24                 goto err1;
25         }
26
27         if (cq) {
28                 count = queue_count(cq->queue, QUEUE_TYPE_TO_CLIENT);
29                 if (cqe < count) {
30                         rxe_dbg_cq(cq, "cqe(%d) < current # elements in queue (%d)",
31                                         cqe, count);
32                         goto err1;
33                 }
34         }
35
36         return 0;
37
38 err1:
39         return -EINVAL;
40 }
41
42 int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe,
43                      int comp_vector, struct ib_udata *udata,
44                      struct rxe_create_cq_resp __user *uresp)
45 {
46         int err;
47         enum queue_type type;
48
49         type = QUEUE_TYPE_TO_CLIENT;
50         cq->queue = rxe_queue_init(rxe, &cqe,
51                         sizeof(struct rxe_cqe), type);
52         if (!cq->queue) {
53                 rxe_dbg_dev(rxe, "unable to create cq\n");
54                 return -ENOMEM;
55         }
56
57         err = do_mmap_info(rxe, uresp ? &uresp->mi : NULL, udata,
58                            cq->queue->buf, cq->queue->buf_size, &cq->queue->ip);
59         if (err) {
60                 vfree(cq->queue->buf);
61                 kfree(cq->queue);
62                 return err;
63         }
64
65         cq->is_user = uresp;
66
67         spin_lock_init(&cq->cq_lock);
68         cq->ibcq.cqe = cqe;
69         return 0;
70 }
71
72 int rxe_cq_resize_queue(struct rxe_cq *cq, int cqe,
73                         struct rxe_resize_cq_resp __user *uresp,
74                         struct ib_udata *udata)
75 {
76         int err;
77
78         err = rxe_queue_resize(cq->queue, (unsigned int *)&cqe,
79                                sizeof(struct rxe_cqe), udata,
80                                uresp ? &uresp->mi : NULL, NULL, &cq->cq_lock);
81         if (!err)
82                 cq->ibcq.cqe = cqe;
83
84         return err;
85 }
86
87 /* caller holds reference to cq */
88 int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited)
89 {
90         struct ib_event ev;
91         int full;
92         void *addr;
93         unsigned long flags;
94
95         spin_lock_irqsave(&cq->cq_lock, flags);
96
97         full = queue_full(cq->queue, QUEUE_TYPE_TO_CLIENT);
98         if (unlikely(full)) {
99                 rxe_err_cq(cq, "queue full");
100                 spin_unlock_irqrestore(&cq->cq_lock, flags);
101                 if (cq->ibcq.event_handler) {
102                         ev.device = cq->ibcq.device;
103                         ev.element.cq = &cq->ibcq;
104                         ev.event = IB_EVENT_CQ_ERR;
105                         cq->ibcq.event_handler(&ev, cq->ibcq.cq_context);
106                 }
107
108                 return -EBUSY;
109         }
110
111         addr = queue_producer_addr(cq->queue, QUEUE_TYPE_TO_CLIENT);
112         memcpy(addr, cqe, sizeof(*cqe));
113
114         queue_advance_producer(cq->queue, QUEUE_TYPE_TO_CLIENT);
115
116         if ((cq->notify & IB_CQ_NEXT_COMP) ||
117             (cq->notify & IB_CQ_SOLICITED && solicited)) {
118                 cq->notify = 0;
119                 cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
120         }
121
122         spin_unlock_irqrestore(&cq->cq_lock, flags);
123
124         return 0;
125 }
126
127 void rxe_cq_cleanup(struct rxe_pool_elem *elem)
128 {
129         struct rxe_cq *cq = container_of(elem, typeof(*cq), elem);
130
131         if (cq->queue)
132                 rxe_queue_cleanup(cq->queue);
133 }