-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathsmc_wr.h
108 lines (88 loc) · 3.3 KB
/
smc_wr.h
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
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Shared Memory Communications over RDMA (SMC-R) and RoCE
*
* Work Requests exploiting Infiniband API
*
* Copyright IBM Corp. 2016
*
* Author(s): Steffen Maier <[email protected]>
*/
#ifndef SMC_WR_H
#define SMC_WR_H
#include <linux/atomic.h>
#include <rdma/ib_verbs.h>
#include <asm/div64.h>
#include "smc.h"
#include "smc_core.h"
#define SMC_WR_MAX_CQE 32768 /* max. # of completion queue elements */
#define SMC_WR_BUF_CNT 16 /* # of ctrl buffers per link */
#define SMC_WR_TX_WAIT_FREE_SLOT_TIME (10 * HZ)
#define SMC_WR_TX_WAIT_PENDING_TIME (5 * HZ)
#define SMC_WR_TX_SIZE 44 /* actual size of wr_send data (<=SMC_WR_BUF_SIZE) */
#define SMC_WR_TX_PEND_PRIV_SIZE 32
struct smc_wr_tx_pend_priv {
u8 priv[SMC_WR_TX_PEND_PRIV_SIZE];
};
typedef void (*smc_wr_tx_handler)(struct smc_wr_tx_pend_priv *,
struct smc_link *,
enum ib_wc_status);
typedef bool (*smc_wr_tx_filter)(struct smc_wr_tx_pend_priv *,
unsigned long);
typedef void (*smc_wr_tx_dismisser)(struct smc_wr_tx_pend_priv *);
struct smc_wr_rx_handler {
struct hlist_node list; /* hash table collision resolution */
void (*handler)(struct ib_wc *, void *);
u8 type;
};
/* Only used by RDMA write WRs.
* All other WRs (CDC/LLC) use smc_wr_tx_send handling WR_ID implicitly
*/
static inline long smc_wr_tx_get_next_wr_id(struct smc_link *link)
{
return atomic_long_inc_return(&link->wr_tx_id);
}
static inline void smc_wr_tx_set_wr_id(atomic_long_t *wr_tx_id, long val)
{
atomic_long_set(wr_tx_id, val);
}
/* post a new receive work request to fill a completed old work request entry */
static inline int smc_wr_rx_post(struct smc_link *link)
{
struct ib_recv_wr *bad_recv_wr = NULL;
int rc;
u64 wr_id, temp_wr_id;
u32 index;
wr_id = ++link->wr_rx_id; /* tasklet context, thus not atomic */
temp_wr_id = wr_id;
index = do_div(temp_wr_id, link->wr_rx_cnt);
link->wr_rx_ibs[index].wr_id = wr_id;
rc = ib_post_recv(link->roce_qp, &link->wr_rx_ibs[index], &bad_recv_wr);
return rc;
}
int smc_wr_create_link(struct smc_link *lnk);
int smc_wr_alloc_link_mem(struct smc_link *lnk);
void smc_wr_free_link(struct smc_link *lnk);
void smc_wr_free_link_mem(struct smc_link *lnk);
void smc_wr_remember_qp_attr(struct smc_link *lnk);
void smc_wr_remove_dev(struct smc_ib_device *smcibdev);
void smc_wr_add_dev(struct smc_ib_device *smcibdev);
int smc_wr_tx_get_free_slot(struct smc_link *link, smc_wr_tx_handler handler,
struct smc_wr_buf **wr_buf,
struct smc_wr_tx_pend_priv **wr_pend_priv);
int smc_wr_tx_put_slot(struct smc_link *link,
struct smc_wr_tx_pend_priv *wr_pend_priv);
int smc_wr_tx_send(struct smc_link *link,
struct smc_wr_tx_pend_priv *wr_pend_priv);
void smc_wr_tx_cq_handler(struct ib_cq *ib_cq, void *cq_context);
bool smc_wr_tx_has_pending(struct smc_link *link, u8 wr_rx_hdr_type,
smc_wr_tx_filter filter, unsigned long data);
void smc_wr_tx_dismiss_slots(struct smc_link *lnk, u8 wr_rx_hdr_type,
smc_wr_tx_filter filter,
smc_wr_tx_dismisser dismisser,
unsigned long data);
int smc_wr_rx_register_handler(struct smc_wr_rx_handler *handler);
int smc_wr_rx_post_init(struct smc_link *link);
void smc_wr_rx_cq_handler(struct ib_cq *ib_cq, void *cq_context);
int smc_wr_reg_send(struct smc_link *link, struct ib_mr *mr);
#endif /* SMC_WR_H */