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
77struct 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 */
92static 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
105static 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
112static 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
119static 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
127static 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
136static 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 */
150static inline u16
151hfi1_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 */
161static inline struct tid_group *
162hfi1_idx_to_tid_group(struct hfi1_ctxtdata *rcd, u16 idx)
163{
164	return &rcd->groups[idx];
165}
166
167int hfi1_alloc_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd);
168void hfi1_free_ctxt_rcv_groups(struct hfi1_ctxtdata *rcd);
169void hfi1_exp_tid_group_init(struct hfi1_ctxtdata *rcd);
170
171#endif /* _HFI1_EXP_RCV_H */
172