1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
2 /*
3 * Copyright(c) 2017 Intel Corporation.
4 */
5
6 #ifndef _HFI1_EXP_RCV_H
7 #define _HFI1_EXP_RCV_H
8 #include "hfi.h"
9
10 #define EXP_TID_SET_EMPTY(set) (set.count == 0 && list_empty(&set.list))
11
12 #define EXP_TID_TIDLEN_MASK 0x7FFULL
13 #define EXP_TID_TIDLEN_SHIFT 0
14 #define EXP_TID_TIDCTRL_MASK 0x3ULL
15 #define EXP_TID_TIDCTRL_SHIFT 20
16 #define EXP_TID_TIDIDX_MASK 0x3FFULL
17 #define EXP_TID_TIDIDX_SHIFT 22
18 #define EXP_TID_GET(tid, field) \
19 (((tid) >> EXP_TID_TID##field##_SHIFT) & EXP_TID_TID##field##_MASK)
20
21 #define EXP_TID_SET(field, value) \
22 (((value) & EXP_TID_TID##field##_MASK) << \
23 EXP_TID_TID##field##_SHIFT)
24 #define EXP_TID_CLEAR(tid, field) ({ \
25 (tid) &= ~(EXP_TID_TID##field##_MASK << \
26 EXP_TID_TID##field##_SHIFT); \
27 })
28 #define EXP_TID_RESET(tid, field, value) do { \
29 EXP_TID_CLEAR(tid, field); \
30 (tid) |= EXP_TID_SET(field, (value)); \
31 } while (0)
32
33 /*
34 * Define fields in the KDETH header so we can update the header
35 * template.
36 */
37 #define KDETH_OFFSET_SHIFT 0
38 #define KDETH_OFFSET_MASK 0x7fff
39 #define KDETH_OM_SHIFT 15
40 #define KDETH_OM_MASK 0x1
41 #define KDETH_TID_SHIFT 16
42 #define KDETH_TID_MASK 0x3ff
43 #define KDETH_TIDCTRL_SHIFT 26
44 #define KDETH_TIDCTRL_MASK 0x3
45 #define KDETH_INTR_SHIFT 28
46 #define KDETH_INTR_MASK 0x1
47 #define KDETH_SH_SHIFT 29
48 #define KDETH_SH_MASK 0x1
49 #define KDETH_KVER_SHIFT 30
50 #define KDETH_KVER_MASK 0x3
51 #define KDETH_JKEY_SHIFT 0x0
52 #define KDETH_JKEY_MASK 0xff
53 #define KDETH_HCRC_UPPER_SHIFT 16
54 #define KDETH_HCRC_UPPER_MASK 0xff
55 #define KDETH_HCRC_LOWER_SHIFT 24
56 #define KDETH_HCRC_LOWER_MASK 0xff
57
58 #define KDETH_GET(val, field) \
59 (((le32_to_cpu((val))) >> KDETH_##field##_SHIFT) & KDETH_##field##_MASK)
60 #define KDETH_SET(dw, field, val) do { \
61 u32 dwval = le32_to_cpu(dw); \
62 dwval &= ~(KDETH_##field##_MASK << KDETH_##field##_SHIFT); \
63 dwval |= (((val) & KDETH_##field##_MASK) << \
64 KDETH_##field##_SHIFT); \
65 dw = cpu_to_le32(dwval); \
66 } while (0)
67
68 #define KDETH_RESET(dw, field, val) ({ dw = 0; KDETH_SET(dw, field, val); })
69
70 /* KDETH OM multipliers and switch over point */
71 #define KDETH_OM_SMALL 4
72 #define KDETH_OM_SMALL_SHIFT 2
73 #define KDETH_OM_LARGE 64
74 #define KDETH_OM_LARGE_SHIFT 6
75 #define KDETH_OM_MAX_SIZE (1 << ((KDETH_OM_LARGE / KDETH_OM_SMALL) + 1))
76
77 struct tid_group {
78 struct list_head list;
79 u32 base;
80 u8 size;
81 u8 used;
82 u8 map;
83 };
84
85 /*
86 * Write an "empty" RcvArray entry.
87 * This function exists so the TID registaration code can use it
88 * to write to unused/unneeded entries and still take advantage
89 * of the WC performance improvements. The HFI will ignore this
90 * write to the RcvArray entry.
91 */
rcv_array_wc_fill(struct hfi1_devdata * dd,u32 index)92 static inline void rcv_array_wc_fill(struct hfi1_devdata *dd, u32 index)
93 {
94 /*
95 * Doing the WC fill writes only makes sense if the device is
96 * present and the RcvArray has been mapped as WC memory.
97 */
98 if ((dd->flags & HFI1_PRESENT) && dd->rcvarray_wc) {
99 writeq(0, dd->rcvarray_wc + (index * 8));
100 if ((index & 3) == 3)
101 flush_wc();
102 }
103 }
104
tid_group_add_tail(struct tid_group * grp,struct exp_tid_set * set)105 static inline void tid_group_add_tail(struct tid_group *grp,
106 struct exp_tid_set *set)
107 {
108 list_add_tail(&grp->list, &set->list);
109 set->count++;
110 }
111
tid_group_remove(struct tid_group * grp,struct exp_tid_set * set)112 static inline void tid_group_remove(struct tid_group *grp,
113 struct exp_tid_set *set)
114 {
115 list_del_init(&grp->list);
116 set->count--;
117 }
118
tid_group_move(struct tid_group * group,struct exp_tid_set * s1,struct exp_tid_set * s2)119 static inline void tid_group_move(struct tid_group *group,
120 struct exp_tid_set *s1,
121 struct exp_tid_set *s2)
122 {
123 tid_group_remove(group, s1);
124 tid_group_add_tail(group, s2);
125 }
126
tid_group_pop(struct exp_tid_set * set)127 static inline struct tid_group *tid_group_pop(struct exp_tid_set *set)
128 {
129 struct tid_group *grp =
130 list_first_entry(&set->list, struct tid_group, list);
131 list_del_init(&grp->list);
132 set->count--;
133 return grp;
134 }
135
create_tid(u32 rcventry,u32 npages)136 static inline u32 create_tid(u32 rcventry, u32 npages)
137 {
138 u32 pair = rcventry & ~0x1;
139
140 return EXP_TID_SET(IDX, pair >> 1) |
141 EXP_TID_SET(CTRL, 1 << (rcventry - pair)) |
142 EXP_TID_SET(LEN, npages);
143 }
144
145 /**
146 * hfi1_tid_group_to_idx - convert an index to a group
147 * @rcd - the receive context
148 * @grp - the group pointer
149 */
150 static inline u16
hfi1_tid_group_to_idx(struct hfi1_ctxtdata * rcd,struct tid_group * grp)151 hfi1_tid_group_to_idx(struct hfi1_ctxtdata *rcd, struct tid_group *grp)
152 {
153 return grp - &rcd->groups[0];
154 }
155
156 /**
157 * hfi1_idx_to_tid_group - convert a group to an index
158 * @rcd - the receive context
159 * @idx - the index
160 */
161 static inline struct tid_group *
hfi1_idx_to_tid_group(struct hfi1_ctxtdata * rcd,u16 idx)162 hfi1_idx_to_tid_group(struct hfi1_ctxtdata *rcd, u16 idx)
163 {
164 return &rcd->groups[idx];
165 }
166
167 int hfi1_alloc_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd);
168 void hfi1_free_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd);
169 void hfi1_exp_tid_group_init(struct hfi1_ctxtdata *rcd);
170
171 #endif /* _HFI1_EXP_RCV_H */
172