Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0cfdd8f9 UB |
2 | /* |
3 | * Shared Memory Communications over RDMA (SMC-R) and RoCE | |
4 | * | |
5 | * Definitions for SMC Connections, Link Groups and Links | |
6 | * | |
7 | * Copyright IBM Corp. 2016 | |
8 | * | |
9 | * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com> | |
10 | */ | |
11 | ||
12 | #ifndef _SMC_CORE_H | |
13 | #define _SMC_CORE_H | |
14 | ||
f38ba179 | 15 | #include <linux/atomic.h> |
aaf95523 GG |
16 | #include <linux/smc.h> |
17 | #include <linux/pci.h> | |
0cfdd8f9 | 18 | #include <rdma/ib_verbs.h> |
099b990b | 19 | #include <net/genetlink.h> |
0cfdd8f9 UB |
20 | |
21 | #include "smc.h" | |
22 | #include "smc_ib.h" | |
23 | ||
cd6851f3 UB |
24 | #define SMC_RMBS_PER_LGR_MAX 255 /* max. # of RMBs per link group */ |
25 | ||
0cfdd8f9 UB |
26 | struct smc_lgr_list { /* list of link group definition */ |
27 | struct list_head list; | |
28 | spinlock_t lock; /* protects list of link groups */ | |
9fda3510 | 29 | u32 num; /* unique link group number */ |
0cfdd8f9 UB |
30 | }; |
31 | ||
0cfdd8f9 UB |
32 | enum smc_lgr_role { /* possible roles of a link group */ |
33 | SMC_CLNT, /* client */ | |
34 | SMC_SERV /* server */ | |
35 | }; | |
36 | ||
52bedf37 | 37 | enum smc_link_state { /* possible states of a link */ |
d854fcbf | 38 | SMC_LNK_UNUSED, /* link is unused */ |
52bedf37 KG |
39 | SMC_LNK_INACTIVE, /* link is inactive */ |
40 | SMC_LNK_ACTIVATING, /* link is being activated */ | |
0d18a0cb | 41 | SMC_LNK_ACTIVE, /* link is active */ |
52bedf37 KG |
42 | }; |
43 | ||
f38ba179 | 44 | #define SMC_WR_BUF_SIZE 48 /* size of work request buffer */ |
8799e310 | 45 | #define SMC_WR_BUF_V2_SIZE 8192 /* size of v2 work request buffer */ |
f38ba179 UB |
46 | |
47 | struct smc_wr_buf { | |
48 | u8 raw[SMC_WR_BUF_SIZE]; | |
49 | }; | |
50 | ||
8799e310 KG |
51 | struct smc_wr_v2_buf { |
52 | u8 raw[SMC_WR_BUF_V2_SIZE]; | |
53 | }; | |
54 | ||
652a1e41 UB |
55 | #define SMC_WR_REG_MR_WAIT_TIME (5 * HZ)/* wait time for ib_wr_reg_mr result */ |
56 | ||
57 | enum smc_wr_reg_state { | |
58 | POSTED, /* ib_wr_reg_mr request posted */ | |
59 | CONFIRMED, /* ib_wr_reg_mr response: successful */ | |
60 | FAILED /* ib_wr_reg_mr response: failure */ | |
61 | }; | |
62 | ||
ad6f317f UB |
63 | struct smc_rdma_sge { /* sges for RDMA writes */ |
64 | struct ib_sge wr_tx_rdma_sge[SMC_IB_MAX_SEND_SGE]; | |
65 | }; | |
66 | ||
67 | #define SMC_MAX_RDMA_WRITES 2 /* max. # of RDMA writes per | |
68 | * message send | |
69 | */ | |
70 | ||
71 | struct smc_rdma_sges { /* sges per message send */ | |
72 | struct smc_rdma_sge tx_rdma_sge[SMC_MAX_RDMA_WRITES]; | |
73 | }; | |
74 | ||
75 | struct smc_rdma_wr { /* work requests per message | |
76 | * send | |
77 | */ | |
78 | struct ib_rdma_wr wr_tx_rdma[SMC_MAX_RDMA_WRITES]; | |
79 | }; | |
80 | ||
45fa8da0 KG |
81 | #define SMC_LGR_ID_SIZE 4 |
82 | ||
0cfdd8f9 UB |
83 | struct smc_link { |
84 | struct smc_ib_device *smcibdev; /* ib-device */ | |
85 | u8 ibport; /* port - values 1 | 2 */ | |
f38ba179 UB |
86 | struct ib_pd *roce_pd; /* IB protection domain, |
87 | * unique for every RoCE QP | |
88 | */ | |
0cfdd8f9 UB |
89 | struct ib_qp *roce_qp; /* IB queue pair */ |
90 | struct ib_qp_attr qp_attr; /* IB queue pair attributes */ | |
f38ba179 UB |
91 | |
92 | struct smc_wr_buf *wr_tx_bufs; /* WR send payload buffers */ | |
93 | struct ib_send_wr *wr_tx_ibs; /* WR send meta data */ | |
94 | struct ib_sge *wr_tx_sges; /* WR send gather meta data */ | |
ad6f317f UB |
95 | struct smc_rdma_sges *wr_tx_rdma_sges;/*RDMA WRITE gather meta data*/ |
96 | struct smc_rdma_wr *wr_tx_rdmas; /* WR RDMA WRITE */ | |
f38ba179 | 97 | struct smc_wr_tx_pend *wr_tx_pends; /* WR send waiting for CQE */ |
09c61d24 | 98 | struct completion *wr_tx_compl; /* WR send CQE completion */ |
f38ba179 | 99 | /* above four vectors have wr_tx_cnt elements and use the same index */ |
8799e310 KG |
100 | struct ib_send_wr *wr_tx_v2_ib; /* WR send v2 meta data */ |
101 | struct ib_sge *wr_tx_v2_sge; /* WR send v2 gather meta data*/ | |
102 | struct smc_wr_tx_pend *wr_tx_v2_pend; /* WR send v2 waiting for CQE */ | |
f38ba179 | 103 | dma_addr_t wr_tx_dma_addr; /* DMA address of wr_tx_bufs */ |
8799e310 | 104 | dma_addr_t wr_tx_v2_dma_addr; /* DMA address of v2 tx buf*/ |
f38ba179 UB |
105 | atomic_long_t wr_tx_id; /* seq # of last sent WR */ |
106 | unsigned long *wr_tx_mask; /* bit mask of used indexes */ | |
107 | u32 wr_tx_cnt; /* number of WR send buffers */ | |
108 | wait_queue_head_t wr_tx_wait; /* wait for free WR send buf */ | |
79a22238 KS |
109 | struct { |
110 | struct percpu_ref wr_tx_refs; | |
111 | } ____cacheline_aligned_in_smp; | |
112 | struct completion tx_ref_comp; | |
f38ba179 UB |
113 | |
114 | struct smc_wr_buf *wr_rx_bufs; /* WR recv payload buffers */ | |
115 | struct ib_recv_wr *wr_rx_ibs; /* WR recv meta data */ | |
116 | struct ib_sge *wr_rx_sges; /* WR recv scatter meta data */ | |
117 | /* above three vectors have wr_rx_cnt elements and use the same index */ | |
118 | dma_addr_t wr_rx_dma_addr; /* DMA address of wr_rx_bufs */ | |
8799e310 | 119 | dma_addr_t wr_rx_v2_dma_addr; /* DMA address of v2 rx buf*/ |
f38ba179 | 120 | u64 wr_rx_id; /* seq # of last recv WR */ |
e9b1a4f8 | 121 | u64 wr_rx_id_compl; /* seq # of last completed WR */ |
f38ba179 | 122 | u32 wr_rx_cnt; /* number of WR recv buffers */ |
877ae5be | 123 | unsigned long wr_rx_tstamp; /* jiffies when last buf rx */ |
e9b1a4f8 | 124 | wait_queue_head_t wr_rx_empty_wait; /* wait for RQ empty */ |
f38ba179 | 125 | |
652a1e41 UB |
126 | struct ib_reg_wr wr_reg; /* WR register memory region */ |
127 | wait_queue_head_t wr_reg_wait; /* wait for wr_reg result */ | |
79a22238 KS |
128 | struct { |
129 | struct percpu_ref wr_reg_refs; | |
130 | } ____cacheline_aligned_in_smp; | |
131 | struct completion reg_ref_comp; | |
652a1e41 UB |
132 | enum smc_wr_reg_state wr_reg_state; /* state of wr_reg request */ |
133 | ||
7005ada6 UB |
134 | u8 gid[SMC_GID_SIZE];/* gid matching used vlan id*/ |
135 | u8 sgid_index; /* gid index for vlan id */ | |
0cfdd8f9 UB |
136 | u32 peer_qpn; /* QP number of peer */ |
137 | enum ib_mtu path_mtu; /* used mtu */ | |
138 | enum ib_mtu peer_mtu; /* mtu size of peer */ | |
139 | u32 psn_initial; /* QP tx initial packet seqno */ | |
140 | u32 peer_psn; /* QP rx initial packet seqno */ | |
141 | u8 peer_mac[ETH_ALEN]; /* = gid[8:10||13:15] */ | |
7005ada6 | 142 | u8 peer_gid[SMC_GID_SIZE]; /* gid of peer*/ |
9bf9abea | 143 | u8 link_id; /* unique # within link group */ |
45fa8da0 | 144 | u8 link_uid[SMC_LGR_ID_SIZE]; /* unique lnk id */ |
649758ff | 145 | u8 peer_link_uid[SMC_LGR_ID_SIZE]; /* peer uid */ |
026c381f | 146 | u8 link_idx; /* index in lgr link array */ |
ad6c111b | 147 | u8 link_is_asym; /* is link asymmetric? */ |
20c9398d WG |
148 | u8 clearing : 1; /* link is being cleared */ |
149 | refcount_t refcnt; /* link reference count */ | |
387707fd | 150 | struct smc_link_group *lgr; /* parent link group */ |
541afa10 | 151 | struct work_struct link_down_wrk; /* wrk to bring link down */ |
6443b2f6 GG |
152 | char ibname[IB_DEVICE_NAME_MAX]; /* ib device name */ |
153 | int ndev_ifidx; /* network device ifindex */ | |
52bedf37 KG |
154 | |
155 | enum smc_link_state state; /* state of link */ | |
877ae5be KG |
156 | struct delayed_work llc_testlink_wrk; /* testlink worker */ |
157 | struct completion llc_testlink_resp; /* wait for rx of testlink */ | |
158 | int llc_testlink_time; /* testlink interval */ | |
07d51580 | 159 | atomic_t conn_cnt; /* connections on this link */ |
0cfdd8f9 UB |
160 | }; |
161 | ||
162 | /* For now we just allow one parallel link per link group. The SMC protocol | |
163 | * allows more (up to 8). | |
164 | */ | |
8574cf40 | 165 | #define SMC_LINKS_PER_LGR_MAX 3 |
0cfdd8f9 UB |
166 | #define SMC_SINGLE_LINK 0 |
167 | ||
cd6851f3 UB |
168 | /* tx/rx buffer list element for sndbufs list and rmbs list of a lgr */ |
169 | struct smc_buf_desc { | |
170 | struct list_head list; | |
cd6851f3 | 171 | void *cpu_addr; /* virtual address of buffer */ |
2ef4f27a | 172 | struct page *pages; |
69cb7dc0 | 173 | int len; /* length of buffer */ |
cd6851f3 | 174 | u32 used; /* currently used / unused */ |
c6ba7c9b HW |
175 | union { |
176 | struct { /* SMC-R */ | |
b9247544 KG |
177 | struct sg_table sgt[SMC_LINKS_PER_LGR_MAX]; |
178 | /* virtual buffer */ | |
b8d19945 WG |
179 | struct ib_mr *mr[SMC_LINKS_PER_LGR_MAX]; |
180 | /* memory region: for rmb and | |
181 | * vzalloced sndbuf | |
b9247544 | 182 | * incl. rkey provided to peer |
b8d19945 | 183 | * and lkey provided to local |
b9247544 KG |
184 | */ |
185 | u32 order; /* allocation order */ | |
186 | ||
187 | u8 is_conf_rkey; | |
188 | /* confirm_rkey done */ | |
189 | u8 is_reg_mr[SMC_LINKS_PER_LGR_MAX]; | |
190 | /* mem region registered */ | |
191 | u8 is_map_ib[SMC_LINKS_PER_LGR_MAX]; | |
192 | /* mem region mapped to lnk */ | |
0ef69e78 | 193 | u8 is_dma_need_sync; |
b9247544 KG |
194 | u8 is_reg_err; |
195 | /* buffer registration err */ | |
b8d19945 WG |
196 | u8 is_vm; |
197 | /* virtually contiguous */ | |
c6ba7c9b HW |
198 | }; |
199 | struct { /* SMC-D */ | |
b9247544 KG |
200 | unsigned short sba_idx; |
201 | /* SBA index number */ | |
202 | u64 token; | |
203 | /* DMB token number */ | |
204 | dma_addr_t dma_addr; | |
205 | /* DMA address */ | |
c6ba7c9b HW |
206 | }; |
207 | }; | |
cd6851f3 UB |
208 | }; |
209 | ||
bd4ad577 UB |
210 | struct smc_rtoken { /* address/key of remote RMB */ |
211 | u64 dma_addr; | |
212 | u32 rkey; | |
213 | }; | |
214 | ||
2f6becaf HW |
215 | #define SMC_BUF_MIN_SIZE 16384 /* minimum size of an RMB */ |
216 | #define SMC_RMBE_SIZES 16 /* number of distinct RMBE sizes */ | |
217 | /* theoretically, the RFC states that largest size would be 512K, | |
218 | * i.e. compressed 5 and thus 6 sizes (0..5), despite | |
219 | * struct smc_clc_msg_accept_confirm.rmbe_size being a 4 bit value (0..15) | |
220 | */ | |
9bf9abea | 221 | |
c6ba7c9b HW |
222 | struct smcd_dev; |
223 | ||
81e6e5e7 KG |
224 | enum smc_lgr_type { /* redundancy state of lgr */ |
225 | SMC_LGR_NONE, /* no active links, lgr to be deleted */ | |
226 | SMC_LGR_SINGLE, /* 1 active RNIC on each peer */ | |
227 | SMC_LGR_SYMMETRIC, /* 2 active RNICs on each peer */ | |
228 | SMC_LGR_ASYMMETRIC_PEER, /* local has 2, peer 1 active RNICs */ | |
229 | SMC_LGR_ASYMMETRIC_LOCAL, /* local has 1, peer 2 active RNICs */ | |
230 | }; | |
231 | ||
4bc5008e WG |
232 | enum smcr_buf_type { /* types of SMC-R sndbufs and RMBs */ |
233 | SMCR_PHYS_CONT_BUFS = 0, | |
234 | SMCR_VIRT_CONT_BUFS = 1, | |
235 | SMCR_MIXED_BUFS = 2, | |
236 | }; | |
237 | ||
555da9af KG |
238 | enum smc_llc_flowtype { |
239 | SMC_LLC_FLOW_NONE = 0, | |
240 | SMC_LLC_FLOW_ADD_LINK = 2, | |
241 | SMC_LLC_FLOW_DEL_LINK = 4, | |
b4ba4652 | 242 | SMC_LLC_FLOW_REQ_ADD_LINK = 5, |
555da9af KG |
243 | SMC_LLC_FLOW_RKEY = 6, |
244 | }; | |
245 | ||
246 | struct smc_llc_qentry; | |
247 | ||
248 | struct smc_llc_flow { | |
249 | enum smc_llc_flowtype type; | |
250 | struct smc_llc_qentry *qentry; | |
251 | }; | |
252 | ||
0cfdd8f9 UB |
253 | struct smc_link_group { |
254 | struct list_head list; | |
0cfdd8f9 UB |
255 | struct rb_root conns_all; /* connection tree */ |
256 | rwlock_t conns_lock; /* protects conns_all */ | |
257 | unsigned int conns_num; /* current # of connections */ | |
258 | unsigned short vlan_id; /* vlan id of link group */ | |
cd6851f3 UB |
259 | |
260 | struct list_head sndbufs[SMC_RMBE_SIZES];/* tx buffers */ | |
aff7bfed | 261 | struct rw_semaphore sndbufs_lock; /* protects tx buffers */ |
cd6851f3 | 262 | struct list_head rmbs[SMC_RMBE_SIZES]; /* rx buffers */ |
aff7bfed | 263 | struct rw_semaphore rmbs_lock; /* protects rx buffers */ |
bd4ad577 | 264 | |
9bf9abea | 265 | u8 id[SMC_LGR_ID_SIZE]; /* unique lgr id */ |
0cfdd8f9 | 266 | struct delayed_work free_work; /* delayed freeing of an lgr */ |
f528ba24 | 267 | struct work_struct terminate_work; /* abnormal lgr termination */ |
22ef473d | 268 | struct workqueue_struct *tx_wq; /* wq for conn. tx workers */ |
517c300e KG |
269 | u8 sync_err : 1; /* lgr no longer fits to peer */ |
270 | u8 terminating : 1;/* lgr is terminating */ | |
8e316b9e | 271 | u8 freeing : 1; /* lgr is being freed */ |
c6ba7c9b | 272 | |
61f434b0 | 273 | refcount_t refcnt; /* lgr reference count */ |
c6ba7c9b | 274 | bool is_smcd; /* SMC-R or SMC-D */ |
b81a5eb7 UB |
275 | u8 smc_version; |
276 | u8 negotiated_eid[SMC_MAX_EID_LEN]; | |
277 | u8 peer_os; /* peer operating system */ | |
278 | u8 peer_smc_release; | |
279 | u8 peer_hostname[SMC_MAX_HOSTNAME_LEN]; | |
c6ba7c9b HW |
280 | union { |
281 | struct { /* SMC-R */ | |
282 | enum smc_lgr_role role; | |
283 | /* client or server */ | |
284 | struct smc_link lnk[SMC_LINKS_PER_LGR_MAX]; | |
285 | /* smc link */ | |
8799e310 KG |
286 | struct smc_wr_v2_buf *wr_rx_buf_v2; |
287 | /* WR v2 recv payload buffer */ | |
288 | struct smc_wr_v2_buf *wr_tx_buf_v2; | |
289 | /* WR v2 send payload buffer */ | |
c6ba7c9b HW |
290 | char peer_systemid[SMC_SYSTEMID_LEN]; |
291 | /* unique system_id of peer */ | |
292 | struct smc_rtoken rtokens[SMC_RMBS_PER_LGR_MAX] | |
293 | [SMC_LINKS_PER_LGR_MAX]; | |
294 | /* remote addr/key pairs */ | |
144ce4b9 | 295 | DECLARE_BITMAP(rtokens_used_mask, SMC_RMBS_PER_LGR_MAX); |
c6ba7c9b | 296 | /* used rtoken elements */ |
026c381f | 297 | u8 next_link_id; |
81e6e5e7 | 298 | enum smc_lgr_type type; |
b984f370 | 299 | enum smcr_buf_type buf_type; |
81e6e5e7 | 300 | /* redundancy state */ |
35dcf7ec KG |
301 | u8 pnet_id[SMC_MAX_PNETID_LEN + 1]; |
302 | /* pnet id of this lgr */ | |
6c8968c4 KG |
303 | struct list_head llc_event_q; |
304 | /* queue for llc events */ | |
305 | spinlock_t llc_event_q_lock; | |
306 | /* protects llc_event_q */ | |
b5dd4d69 | 307 | struct rw_semaphore llc_conf_mutex; |
d5500667 | 308 | /* protects lgr reconfig. */ |
b45e7f98 | 309 | struct work_struct llc_add_link_work; |
9ec6bf19 | 310 | struct work_struct llc_del_link_work; |
6c8968c4 KG |
311 | struct work_struct llc_event_work; |
312 | /* llc event worker */ | |
6778a6be | 313 | wait_queue_head_t llc_flow_waiter; |
555da9af | 314 | /* w4 next llc event */ |
6778a6be KG |
315 | wait_queue_head_t llc_msg_waiter; |
316 | /* w4 next llc msg */ | |
555da9af KG |
317 | struct smc_llc_flow llc_flow_lcl; |
318 | /* llc local control field */ | |
319 | struct smc_llc_flow llc_flow_rmt; | |
320 | /* llc remote control field */ | |
321 | struct smc_llc_qentry *delayed_event; | |
322 | /* arrived when flow active */ | |
323 | spinlock_t llc_flow_lock; | |
324 | /* protects llc flow */ | |
00a049cf KG |
325 | int llc_testlink_time; |
326 | /* link keep alive time */ | |
3e0c40af KG |
327 | u32 llc_termination_rsn; |
328 | /* rsn code for termination */ | |
e5c4744c KG |
329 | u8 nexthop_mac[ETH_ALEN]; |
330 | u8 uses_gateway; | |
331 | __be32 saddr; | |
0237a3a6 TL |
332 | /* net namespace */ |
333 | struct net *net; | |
c6ba7c9b HW |
334 | }; |
335 | struct { /* SMC-D */ | |
336 | u64 peer_gid; | |
337 | /* Peer GID (remote) */ | |
338 | struct smcd_dev *smcd; | |
339 | /* ISM device for VLAN reg. */ | |
50c6b20e UB |
340 | u8 peer_shutdown : 1; |
341 | /* peer triggered shutdownn */ | |
c6ba7c9b HW |
342 | }; |
343 | }; | |
0cfdd8f9 UB |
344 | }; |
345 | ||
bc36d2fc KG |
346 | struct smc_clc_msg_local; |
347 | ||
42042dbb KG |
348 | #define GID_LIST_SIZE 2 |
349 | ||
350 | struct smc_gidlist { | |
351 | u8 len; | |
352 | u8 list[GID_LIST_SIZE][SMC_GID_SIZE]; | |
353 | }; | |
354 | ||
355 | struct smc_init_info_smcrv2 { | |
356 | /* Input fields */ | |
357 | __be32 saddr; | |
358 | struct sock *clc_sk; | |
359 | __be32 daddr; | |
360 | ||
361 | /* Output fields when saddr is set */ | |
362 | struct smc_ib_device *ib_dev_v2; | |
363 | u8 ib_port_v2; | |
364 | u8 ib_gid_v2[SMC_GID_SIZE]; | |
365 | ||
366 | /* Additional output fields when clc_sk and daddr is set as well */ | |
367 | u8 uses_gateway; | |
368 | u8 nexthop_mac[ETH_ALEN]; | |
369 | ||
370 | struct smc_gidlist gidlist; | |
371 | }; | |
372 | ||
bc36d2fc KG |
373 | struct smc_init_info { |
374 | u8 is_smcd; | |
d70bf4f7 UB |
375 | u8 smc_type_v1; |
376 | u8 smc_type_v2; | |
5ac54d87 UB |
377 | u8 first_contact_peer; |
378 | u8 first_contact_local; | |
bc36d2fc | 379 | unsigned short vlan_id; |
3752404a | 380 | u32 rc; |
fa086662 | 381 | u8 negotiated_eid[SMC_MAX_EID_LEN]; |
bc36d2fc | 382 | /* SMC-R */ |
42042dbb KG |
383 | u8 smcr_version; |
384 | u8 check_smcrv2; | |
e5c4744c KG |
385 | u8 peer_gid[SMC_GID_SIZE]; |
386 | u8 peer_mac[ETH_ALEN]; | |
387 | u8 peer_systemid[SMC_SYSTEMID_LEN]; | |
bc36d2fc KG |
388 | struct smc_ib_device *ib_dev; |
389 | u8 ib_gid[SMC_GID_SIZE]; | |
390 | u8 ib_port; | |
391 | u32 ib_clcqpn; | |
42042dbb | 392 | struct smc_init_info_smcrv2 smcrv2; |
bc36d2fc | 393 | /* SMC-D */ |
3fc64937 UB |
394 | u64 ism_peer_gid[SMC_MAX_ISM_DEVS + 1]; |
395 | struct smcd_dev *ism_dev[SMC_MAX_ISM_DEVS + 1]; | |
8caaccf5 | 396 | u16 ism_chid[SMC_MAX_ISM_DEVS + 1]; |
d70bf4f7 | 397 | u8 ism_offered_cnt; /* # of ISM devices offered */ |
5c21c4cc | 398 | u8 ism_selected; /* index of selected ISM dev*/ |
d70bf4f7 | 399 | u8 smcd_version; |
bc36d2fc KG |
400 | }; |
401 | ||
0cfdd8f9 UB |
402 | /* Find the connection associated with the given alert token in the link group. |
403 | * To use rbtrees we have to implement our own search core. | |
404 | * Requires @conns_lock | |
405 | * @token alert token to search for | |
406 | * @lgr link group to search in | |
407 | * Returns connection associated with token if found, NULL otherwise. | |
408 | */ | |
409 | static inline struct smc_connection *smc_lgr_find_conn( | |
410 | u32 token, struct smc_link_group *lgr) | |
411 | { | |
412 | struct smc_connection *res = NULL; | |
413 | struct rb_node *node; | |
414 | ||
415 | node = lgr->conns_all.rb_node; | |
416 | while (node) { | |
417 | struct smc_connection *cur = rb_entry(node, | |
418 | struct smc_connection, alert_node); | |
419 | ||
420 | if (cur->alert_token_local > token) { | |
421 | node = node->rb_left; | |
422 | } else { | |
423 | if (cur->alert_token_local < token) { | |
424 | node = node->rb_right; | |
425 | } else { | |
426 | res = cur; | |
427 | break; | |
428 | } | |
429 | } | |
430 | } | |
431 | ||
432 | return res; | |
ea89c6c0 WG |
433 | } |
434 | ||
435 | static inline bool smc_conn_lgr_valid(struct smc_connection *conn) | |
436 | { | |
437 | return conn->lgr && conn->alert_token_local; | |
0cfdd8f9 UB |
438 | } |
439 | ||
1f52a938 DL |
440 | /* |
441 | * Returns true if the specified link is usable. | |
442 | * | |
443 | * usable means the link is ready to receive RDMA messages, map memory | |
444 | * on the link, etc. This doesn't ensure we are able to send RDMA messages | |
445 | * on this link, if sending RDMA messages is needed, use smc_link_sendable() | |
446 | */ | |
d854fcbf KG |
447 | static inline bool smc_link_usable(struct smc_link *lnk) |
448 | { | |
449 | if (lnk->state == SMC_LNK_UNUSED || lnk->state == SMC_LNK_INACTIVE) | |
450 | return false; | |
451 | return true; | |
452 | } | |
453 | ||
1f52a938 DL |
454 | /* |
455 | * Returns true if the specified link is ready to receive AND send RDMA | |
456 | * messages. | |
457 | * | |
458 | * For the client side in first contact, the underlying QP may still in | |
459 | * RESET or RTR when the link state is ACTIVATING, checks in smc_link_usable() | |
460 | * is not strong enough. For those places that need to send any CDC or LLC | |
461 | * messages, use smc_link_sendable(), otherwise, use smc_link_usable() instead | |
462 | */ | |
90cee52f DL |
463 | static inline bool smc_link_sendable(struct smc_link *lnk) |
464 | { | |
465 | return smc_link_usable(lnk) && | |
466 | lnk->qp_attr.cur_qp_state == IB_QPS_RTS; | |
467 | } | |
468 | ||
741a49a4 KG |
469 | static inline bool smc_link_active(struct smc_link *lnk) |
470 | { | |
471 | return lnk->state == SMC_LNK_ACTIVE; | |
472 | } | |
473 | ||
5a7e09d5 GG |
474 | static inline void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw) |
475 | { | |
476 | sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x", | |
477 | be16_to_cpu(((__be16 *)gid_raw)[0]), | |
478 | be16_to_cpu(((__be16 *)gid_raw)[1]), | |
479 | be16_to_cpu(((__be16 *)gid_raw)[2]), | |
480 | be16_to_cpu(((__be16 *)gid_raw)[3]), | |
481 | be16_to_cpu(((__be16 *)gid_raw)[4]), | |
482 | be16_to_cpu(((__be16 *)gid_raw)[5]), | |
483 | be16_to_cpu(((__be16 *)gid_raw)[6]), | |
484 | be16_to_cpu(((__be16 *)gid_raw)[7])); | |
485 | } | |
486 | ||
aaf95523 GG |
487 | struct smc_pci_dev { |
488 | __u32 pci_fid; | |
489 | __u16 pci_pchid; | |
490 | __u16 pci_vendor; | |
491 | __u16 pci_device; | |
492 | __u8 pci_id[SMC_PCI_ID_STR_LEN]; | |
493 | }; | |
494 | ||
495 | static inline void smc_set_pci_values(struct pci_dev *pci_dev, | |
496 | struct smc_pci_dev *smc_dev) | |
497 | { | |
498 | smc_dev->pci_vendor = pci_dev->vendor; | |
499 | smc_dev->pci_device = pci_dev->device; | |
500 | snprintf(smc_dev->pci_id, sizeof(smc_dev->pci_id), "%s", | |
501 | pci_name(pci_dev)); | |
502 | #if IS_ENABLED(CONFIG_S390) | |
503 | { /* Set s390 specific PCI information */ | |
504 | struct zpci_dev *zdev; | |
505 | ||
506 | zdev = to_zpci(pci_dev); | |
507 | smc_dev->pci_fid = zdev->fid; | |
508 | smc_dev->pci_pchid = zdev->pchid; | |
509 | } | |
510 | #endif | |
511 | } | |
512 | ||
cd6851f3 UB |
513 | struct smc_sock; |
514 | struct smc_clc_msg_accept_confirm; | |
515 | ||
36595d8a | 516 | void smc_lgr_cleanup_early(struct smc_link_group *lgr); |
5f78fe96 | 517 | void smc_lgr_terminate_sched(struct smc_link_group *lgr); |
61f434b0 WG |
518 | void smc_lgr_hold(struct smc_link_group *lgr); |
519 | void smc_lgr_put(struct smc_link_group *lgr); | |
1f90a05d | 520 | void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport); |
541afa10 | 521 | void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport); |
0512f69e HW |
522 | void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid, |
523 | unsigned short vlan); | |
5421ec28 | 524 | void smc_smcd_terminate_all(struct smcd_dev *dev); |
0b29ec64 | 525 | void smc_smcr_terminate_all(struct smc_ib_device *smcibdev); |
c6ba7c9b | 526 | int smc_buf_create(struct smc_sock *smc, bool is_smcd); |
2f6becaf | 527 | int smc_uncompress_bufsize(u8 compressed); |
e07d31dc | 528 | int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link, |
bd4ad577 | 529 | struct smc_clc_msg_accept_confirm *clc); |
387707fd KG |
530 | int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey); |
531 | int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey); | |
ba21abd2 KG |
532 | void smc_rtoken_set(struct smc_link_group *lgr, int link_idx, int link_idx_new, |
533 | __be32 nw_rkey_known, __be64 nw_vaddr, __be32 nw_rkey); | |
534 | void smc_rtoken_set2(struct smc_link_group *lgr, int rtok_idx, int link_id, | |
535 | __be64 nw_vaddr, __be32 nw_rkey); | |
10428dd8 UB |
536 | void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn); |
537 | void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn); | |
bc36d2fc | 538 | int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini); |
c6ba7c9b | 539 | |
2f6becaf | 540 | void smc_conn_free(struct smc_connection *conn); |
bc36d2fc | 541 | int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini); |
0d18a0cb | 542 | void smc_lgr_schedule_free_work_fast(struct smc_link_group *lgr); |
6dabd405 | 543 | int smc_core_init(void); |
9fda3510 | 544 | void smc_core_exit(void); |
00e5fb26 | 545 | |
336ba09f KG |
546 | int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk, |
547 | u8 link_idx, struct smc_init_info *ini); | |
0a99be43 | 548 | void smcr_link_clear(struct smc_link *lnk, bool log); |
20c9398d WG |
549 | void smcr_link_hold(struct smc_link *lnk); |
550 | void smcr_link_put(struct smc_link *lnk); | |
64513d26 GG |
551 | void smc_switch_link_and_count(struct smc_connection *conn, |
552 | struct smc_link *to_lnk); | |
fb33d277 KG |
553 | int smcr_buf_map_lgr(struct smc_link *lnk); |
554 | int smcr_buf_reg_lgr(struct smc_link *lnk); | |
ad6c111b KG |
555 | void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type); |
556 | void smcr_lgr_set_type_asym(struct smc_link_group *lgr, | |
557 | enum smc_lgr_type new_type, int asym_lnk_idx); | |
b8d19945 | 558 | int smcr_link_reg_buf(struct smc_link *link, struct smc_buf_desc *rmb_desc); |
c6f02ebe KG |
559 | struct smc_link *smc_switch_conns(struct smc_link_group *lgr, |
560 | struct smc_link *from_lnk, bool is_dev_err); | |
541afa10 KG |
561 | void smcr_link_down_cond(struct smc_link *lnk); |
562 | void smcr_link_down_cond_sched(struct smc_link *lnk); | |
099b990b | 563 | int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb); |
e9b8c845 | 564 | int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb); |
5a7e09d5 | 565 | int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb); |
8f9dde4b | 566 | int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb); |
541afa10 | 567 | |
00e5fb26 SR |
568 | static inline struct smc_link_group *smc_get_lgr(struct smc_link *link) |
569 | { | |
387707fd | 570 | return link->lgr; |
00e5fb26 | 571 | } |
0cfdd8f9 | 572 | #endif |