1 // SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
2 /*
3  * Copyright(c) 2017 Intel Corporation.
4  */
5 
6 #include "exp_rcv.h"
7 #include "trace.h"
8 
9 /**
10  * hfi1_exp_tid_set_init - initialize exp_tid_set
11  * @set: the set
12  */
hfi1_exp_tid_set_init(struct exp_tid_set * set)13 static void hfi1_exp_tid_set_init(struct exp_tid_set *set)
14 {
15 	INIT_LIST_HEAD(&set->list);
16 	set->count = 0;
17 }
18 
19 /**
20  * hfi1_exp_tid_group_init - initialize rcd expected receive
21  * @rcd: the rcd
22  */
hfi1_exp_tid_group_init(struct hfi1_ctxtdata * rcd)23 void hfi1_exp_tid_group_init(struct hfi1_ctxtdata *rcd)
24 {
25 	hfi1_exp_tid_set_init(&rcd->tid_group_list);
26 	hfi1_exp_tid_set_init(&rcd->tid_used_list);
27 	hfi1_exp_tid_set_init(&rcd->tid_full_list);
28 }
29 
30 /**
31  * hfi1_alloc_ctxt_rcv_groups - initialize expected receive groups
32  * @rcd: the context to add the groupings to
33  */
hfi1_alloc_ctxt_rcv_groups(struct hfi1_ctxtdata * rcd)34 int hfi1_alloc_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd)
35 {
36 	struct hfi1_devdata *dd = rcd->dd;
37 	u32 tidbase;
38 	struct tid_group *grp;
39 	int i;
40 	u32 ngroups;
41 
42 	ngroups = rcd->expected_count / dd->rcv_entries.group_size;
43 	rcd->groups =
44 		kcalloc_node(ngroups, sizeof(*rcd->groups),
45 			     GFP_KERNEL, rcd->numa_id);
46 	if (!rcd->groups)
47 		return -ENOMEM;
48 	tidbase = rcd->expected_base;
49 	for (i = 0; i < ngroups; i++) {
50 		grp = &rcd->groups[i];
51 		grp->size = dd->rcv_entries.group_size;
52 		grp->base = tidbase;
53 		tid_group_add_tail(grp, &rcd->tid_group_list);
54 		tidbase += dd->rcv_entries.group_size;
55 	}
56 
57 	return 0;
58 }
59 
60 /**
61  * hfi1_free_ctxt_rcv_groups - free  expected receive groups
62  * @rcd: the context to free
63  *
64  * The routine dismantles the expect receive linked
65  * list and clears any tids associated with the receive
66  * context.
67  *
68  * This should only be called for kernel contexts and the
69  * a base user context.
70  */
hfi1_free_ctxt_rcv_groups(struct hfi1_ctxtdata * rcd)71 void hfi1_free_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd)
72 {
73 	kfree(rcd->groups);
74 	rcd->groups = NULL;
75 	hfi1_exp_tid_group_init(rcd);
76 
77 	hfi1_clear_tids(rcd);
78 }
79