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12#ifndef SMC_WR_H
13#define SMC_WR_H
14
15#include <linux/atomic.h>
16#include <rdma/ib_verbs.h>
17#include <asm/div64.h>
18
19#include "smc.h"
20#include "smc_core.h"
21
22#define SMC_WR_BUF_CNT 16
23
24#define SMC_WR_TX_WAIT_FREE_SLOT_TIME (10 * HZ)
25#define SMC_WR_TX_WAIT_PENDING_TIME (5 * HZ)
26
27#define SMC_WR_TX_SIZE 44
28
29#define SMC_WR_TX_PEND_PRIV_SIZE 32
30
31struct smc_wr_tx_pend_priv {
32 u8 priv[SMC_WR_TX_PEND_PRIV_SIZE];
33};
34
35typedef void (*smc_wr_tx_handler)(struct smc_wr_tx_pend_priv *,
36 struct smc_link *,
37 enum ib_wc_status);
38
39typedef bool (*smc_wr_tx_filter)(struct smc_wr_tx_pend_priv *,
40 unsigned long);
41
42typedef void (*smc_wr_tx_dismisser)(struct smc_wr_tx_pend_priv *);
43
44struct smc_wr_rx_handler {
45 struct hlist_node list;
46 void (*handler)(struct ib_wc *, void *);
47 u8 type;
48};
49
50
51
52
53static inline long smc_wr_tx_get_next_wr_id(struct smc_link *link)
54{
55 return atomic_long_inc_return(&link->wr_tx_id);
56}
57
58static inline void smc_wr_tx_set_wr_id(atomic_long_t *wr_tx_id, long val)
59{
60 atomic_long_set(wr_tx_id, val);
61}
62
63
64static inline int smc_wr_rx_post(struct smc_link *link)
65{
66 int rc;
67 u64 wr_id, temp_wr_id;
68 u32 index;
69
70 wr_id = ++link->wr_rx_id;
71 temp_wr_id = wr_id;
72 index = do_div(temp_wr_id, link->wr_rx_cnt);
73 link->wr_rx_ibs[index].wr_id = wr_id;
74 rc = ib_post_recv(link->roce_qp, &link->wr_rx_ibs[index], NULL);
75 return rc;
76}
77
78int smc_wr_create_link(struct smc_link *lnk);
79int smc_wr_alloc_link_mem(struct smc_link *lnk);
80void smc_wr_free_link(struct smc_link *lnk);
81void smc_wr_free_link_mem(struct smc_link *lnk);
82void smc_wr_remember_qp_attr(struct smc_link *lnk);
83void smc_wr_remove_dev(struct smc_ib_device *smcibdev);
84void smc_wr_add_dev(struct smc_ib_device *smcibdev);
85
86int smc_wr_tx_get_free_slot(struct smc_link *link, smc_wr_tx_handler handler,
87 struct smc_wr_buf **wr_buf,
88 struct smc_rdma_wr **wrs,
89 struct smc_wr_tx_pend_priv **wr_pend_priv);
90int smc_wr_tx_put_slot(struct smc_link *link,
91 struct smc_wr_tx_pend_priv *wr_pend_priv);
92int smc_wr_tx_send(struct smc_link *link,
93 struct smc_wr_tx_pend_priv *wr_pend_priv);
94void smc_wr_tx_cq_handler(struct ib_cq *ib_cq, void *cq_context);
95void smc_wr_tx_dismiss_slots(struct smc_link *lnk, u8 wr_rx_hdr_type,
96 smc_wr_tx_filter filter,
97 smc_wr_tx_dismisser dismisser,
98 unsigned long data);
99
100int smc_wr_rx_register_handler(struct smc_wr_rx_handler *handler);
101int smc_wr_rx_post_init(struct smc_link *link);
102void smc_wr_rx_cq_handler(struct ib_cq *ib_cq, void *cq_context);
103int smc_wr_reg_send(struct smc_link *link, struct ib_mr *mr);
104
105#endif
106