1
2#ifndef _RDS_IB_H
3#define _RDS_IB_H
4
5#include <rdma/ib_verbs.h>
6#include <rdma/rdma_cm.h>
7#include <linux/interrupt.h>
8#include <linux/pci.h>
9#include <linux/slab.h>
10#include "rds.h"
11#include "rdma_transport.h"
12
13#define RDS_IB_MAX_SGE 8
14#define RDS_IB_RECV_SGE 2
15
16#define RDS_IB_DEFAULT_RECV_WR 1024
17#define RDS_IB_DEFAULT_SEND_WR 256
18#define RDS_IB_DEFAULT_FR_WR 256
19#define RDS_IB_DEFAULT_FR_INV_WR 256
20
21#define RDS_IB_DEFAULT_RETRY_COUNT 1
22
23#define RDS_IB_SUPPORTED_PROTOCOLS 0x00000003
24
25#define RDS_IB_RECYCLE_BATCH_COUNT 32
26
27#define RDS_IB_WC_MAX 32
28
29extern struct rw_semaphore rds_ib_devices_lock;
30extern struct list_head rds_ib_devices;
31
32
33
34
35
36
37struct rds_page_frag {
38 struct list_head f_item;
39 struct list_head f_cache_entry;
40 struct scatterlist f_sg;
41};
42
43struct rds_ib_incoming {
44 struct list_head ii_frags;
45 struct list_head ii_cache_entry;
46 struct rds_incoming ii_inc;
47};
48
49struct rds_ib_cache_head {
50 struct list_head *first;
51 unsigned long count;
52};
53
54struct rds_ib_refill_cache {
55 struct rds_ib_cache_head __percpu *percpu;
56 struct list_head *xfer;
57 struct list_head *ready;
58};
59
60
61
62
63
64
65
66struct rds_ib_conn_priv_cmn {
67 u8 ricpc_protocol_major;
68 u8 ricpc_protocol_minor;
69 __be16 ricpc_protocol_minor_mask;
70 u8 ricpc_dp_toss;
71 u8 ripc_reserved1;
72 __be16 ripc_reserved2;
73 __be64 ricpc_ack_seq;
74 __be32 ricpc_credit;
75};
76
77struct rds_ib_connect_private {
78
79 __be32 dp_saddr;
80 __be32 dp_daddr;
81 struct rds_ib_conn_priv_cmn dp_cmn;
82};
83
84struct rds6_ib_connect_private {
85
86 struct in6_addr dp_saddr;
87 struct in6_addr dp_daddr;
88 struct rds_ib_conn_priv_cmn dp_cmn;
89};
90
91#define dp_protocol_major dp_cmn.ricpc_protocol_major
92#define dp_protocol_minor dp_cmn.ricpc_protocol_minor
93#define dp_protocol_minor_mask dp_cmn.ricpc_protocol_minor_mask
94#define dp_ack_seq dp_cmn.ricpc_ack_seq
95#define dp_credit dp_cmn.ricpc_credit
96
97union rds_ib_conn_priv {
98 struct rds_ib_connect_private ricp_v4;
99 struct rds6_ib_connect_private ricp_v6;
100};
101
102struct rds_ib_send_work {
103 void *s_op;
104 union {
105 struct ib_send_wr s_wr;
106 struct ib_rdma_wr s_rdma_wr;
107 struct ib_atomic_wr s_atomic_wr;
108 };
109 struct ib_sge s_sge[RDS_IB_MAX_SGE];
110 unsigned long s_queued;
111};
112
113struct rds_ib_recv_work {
114 struct rds_ib_incoming *r_ibinc;
115 struct rds_page_frag *r_frag;
116 struct ib_recv_wr r_wr;
117 struct ib_sge r_sge[2];
118};
119
120struct rds_ib_work_ring {
121 u32 w_nr;
122 u32 w_alloc_ptr;
123 u32 w_alloc_ctr;
124 u32 w_free_ptr;
125 atomic_t w_free_ctr;
126};
127
128
129
130
131
132
133struct rds_ib_ack_state {
134 u64 ack_next;
135 u64 ack_recv;
136 unsigned int ack_required:1;
137 unsigned int ack_next_valid:1;
138 unsigned int ack_recv_valid:1;
139};
140
141
142struct rds_ib_device;
143
144struct rds_ib_connection {
145
146 struct list_head ib_node;
147 struct rds_ib_device *rds_ibdev;
148 struct rds_connection *conn;
149
150
151 struct rdma_cm_id *i_cm_id;
152 struct ib_pd *i_pd;
153 struct ib_cq *i_send_cq;
154 struct ib_cq *i_recv_cq;
155 struct ib_wc i_send_wc[RDS_IB_WC_MAX];
156 struct ib_wc i_recv_wc[RDS_IB_WC_MAX];
157
158
159 atomic_t i_fastreg_wrs;
160 atomic_t i_fastunreg_wrs;
161
162
163 struct tasklet_struct i_send_tasklet;
164 struct tasklet_struct i_recv_tasklet;
165
166
167 struct rds_ib_work_ring i_send_ring;
168 struct rm_data_op *i_data_op;
169 struct rds_header *i_send_hdrs;
170 dma_addr_t i_send_hdrs_dma;
171 struct rds_ib_send_work *i_sends;
172 atomic_t i_signaled_sends;
173
174
175 struct mutex i_recv_mutex;
176 struct rds_ib_work_ring i_recv_ring;
177 struct rds_ib_incoming *i_ibinc;
178 u32 i_recv_data_rem;
179 struct rds_header *i_recv_hdrs;
180 dma_addr_t i_recv_hdrs_dma;
181 struct rds_ib_recv_work *i_recvs;
182 u64 i_ack_recv;
183 struct rds_ib_refill_cache i_cache_incs;
184 struct rds_ib_refill_cache i_cache_frags;
185 atomic_t i_cache_allocs;
186
187
188 unsigned long i_ack_flags;
189#ifdef KERNEL_HAS_ATOMIC64
190 atomic64_t i_ack_next;
191#else
192 spinlock_t i_ack_lock;
193 u64 i_ack_next;
194#endif
195 struct rds_header *i_ack;
196 struct ib_send_wr i_ack_wr;
197 struct ib_sge i_ack_sge;
198 dma_addr_t i_ack_dma;
199 unsigned long i_ack_queued;
200
201
202
203
204
205
206
207
208
209 atomic_t i_credits;
210
211
212 unsigned int i_flowctl:1;
213
214
215 unsigned int i_unsignaled_wrs;
216
217
218 bool i_active_side;
219 atomic_t i_cq_quiesce;
220
221
222 int i_scq_vector;
223 int i_rcq_vector;
224};
225
226
227#define IB_GET_SEND_CREDITS(v) ((v) & 0xffff)
228#define IB_GET_POST_CREDITS(v) ((v) >> 16)
229#define IB_SET_SEND_CREDITS(v) ((v) & 0xffff)
230#define IB_SET_POST_CREDITS(v) ((v) << 16)
231
232struct rds_ib_ipaddr {
233 struct list_head list;
234 __be32 ipaddr;
235 struct rcu_head rcu;
236};
237
238enum {
239 RDS_IB_MR_8K_POOL,
240 RDS_IB_MR_1M_POOL,
241};
242
243struct rds_ib_device {
244 struct list_head list;
245 struct list_head ipaddr_list;
246 struct list_head conn_list;
247 struct ib_device *dev;
248 struct ib_pd *pd;
249 bool use_fastreg;
250
251 unsigned int max_mrs;
252 struct rds_ib_mr_pool *mr_1m_pool;
253 struct rds_ib_mr_pool *mr_8k_pool;
254 unsigned int fmr_max_remaps;
255 unsigned int max_8k_mrs;
256 unsigned int max_1m_mrs;
257 int max_sge;
258 unsigned int max_wrs;
259 unsigned int max_initiator_depth;
260 unsigned int max_responder_resources;
261 spinlock_t spinlock;
262 refcount_t refcount;
263 struct work_struct free_work;
264 int *vector_load;
265};
266
267#define ibdev_to_node(ibdev) dev_to_node((ibdev)->dev.parent)
268#define rdsibdev_to_node(rdsibdev) ibdev_to_node(rdsibdev->dev)
269
270
271#define IB_ACK_IN_FLIGHT 0
272#define IB_ACK_REQUESTED 1
273
274
275#define RDS_IB_ACK_WR_ID (~(u64) 0)
276
277struct rds_ib_statistics {
278 uint64_t s_ib_connect_raced;
279 uint64_t s_ib_listen_closed_stale;
280 uint64_t s_ib_evt_handler_call;
281 uint64_t s_ib_tasklet_call;
282 uint64_t s_ib_tx_cq_event;
283 uint64_t s_ib_tx_ring_full;
284 uint64_t s_ib_tx_throttle;
285 uint64_t s_ib_tx_sg_mapping_failure;
286 uint64_t s_ib_tx_stalled;
287 uint64_t s_ib_tx_credit_updates;
288 uint64_t s_ib_rx_cq_event;
289 uint64_t s_ib_rx_ring_empty;
290 uint64_t s_ib_rx_refill_from_cq;
291 uint64_t s_ib_rx_refill_from_thread;
292 uint64_t s_ib_rx_alloc_limit;
293 uint64_t s_ib_rx_total_frags;
294 uint64_t s_ib_rx_total_incs;
295 uint64_t s_ib_rx_credit_updates;
296 uint64_t s_ib_ack_sent;
297 uint64_t s_ib_ack_send_failure;
298 uint64_t s_ib_ack_send_delayed;
299 uint64_t s_ib_ack_send_piggybacked;
300 uint64_t s_ib_ack_received;
301 uint64_t s_ib_rdma_mr_8k_alloc;
302 uint64_t s_ib_rdma_mr_8k_free;
303 uint64_t s_ib_rdma_mr_8k_used;
304 uint64_t s_ib_rdma_mr_8k_pool_flush;
305 uint64_t s_ib_rdma_mr_8k_pool_wait;
306 uint64_t s_ib_rdma_mr_8k_pool_depleted;
307 uint64_t s_ib_rdma_mr_1m_alloc;
308 uint64_t s_ib_rdma_mr_1m_free;
309 uint64_t s_ib_rdma_mr_1m_used;
310 uint64_t s_ib_rdma_mr_1m_pool_flush;
311 uint64_t s_ib_rdma_mr_1m_pool_wait;
312 uint64_t s_ib_rdma_mr_1m_pool_depleted;
313 uint64_t s_ib_rdma_mr_8k_reused;
314 uint64_t s_ib_rdma_mr_1m_reused;
315 uint64_t s_ib_atomic_cswp;
316 uint64_t s_ib_atomic_fadd;
317 uint64_t s_ib_recv_added_to_cache;
318 uint64_t s_ib_recv_removed_from_cache;
319};
320
321extern struct workqueue_struct *rds_ib_wq;
322
323
324
325
326
327static inline void rds_ib_dma_sync_sg_for_cpu(struct ib_device *dev,
328 struct scatterlist *sglist,
329 unsigned int sg_dma_len,
330 int direction)
331{
332 struct scatterlist *sg;
333 unsigned int i;
334
335 for_each_sg(sglist, sg, sg_dma_len, i) {
336 ib_dma_sync_single_for_cpu(dev, sg_dma_address(sg),
337 sg_dma_len(sg), direction);
338 }
339}
340#define ib_dma_sync_sg_for_cpu rds_ib_dma_sync_sg_for_cpu
341
342static inline void rds_ib_dma_sync_sg_for_device(struct ib_device *dev,
343 struct scatterlist *sglist,
344 unsigned int sg_dma_len,
345 int direction)
346{
347 struct scatterlist *sg;
348 unsigned int i;
349
350 for_each_sg(sglist, sg, sg_dma_len, i) {
351 ib_dma_sync_single_for_device(dev, sg_dma_address(sg),
352 sg_dma_len(sg), direction);
353 }
354}
355#define ib_dma_sync_sg_for_device rds_ib_dma_sync_sg_for_device
356
357
358
359extern struct rds_transport rds_ib_transport;
360struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device);
361void rds_ib_dev_put(struct rds_ib_device *rds_ibdev);
362extern struct ib_client rds_ib_client;
363
364extern unsigned int rds_ib_retry_count;
365
366extern spinlock_t ib_nodev_conns_lock;
367extern struct list_head ib_nodev_conns;
368
369
370int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp);
371void rds_ib_conn_free(void *arg);
372int rds_ib_conn_path_connect(struct rds_conn_path *cp);
373void rds_ib_conn_path_shutdown(struct rds_conn_path *cp);
374void rds_ib_state_change(struct sock *sk);
375int rds_ib_listen_init(void);
376void rds_ib_listen_stop(void);
377__printf(2, 3)
378void __rds_ib_conn_error(struct rds_connection *conn, const char *, ...);
379int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id,
380 struct rdma_cm_event *event, bool isv6);
381int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id, bool isv6);
382void rds_ib_cm_connect_complete(struct rds_connection *conn,
383 struct rdma_cm_event *event);
384
385
386#define rds_ib_conn_error(conn, fmt...) \
387 __rds_ib_conn_error(conn, KERN_WARNING "RDS/IB: " fmt)
388
389
390int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev,
391 struct in6_addr *ipaddr);
392void rds_ib_add_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
393void rds_ib_remove_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
394void rds_ib_destroy_nodev_conns(void);
395void rds_ib_mr_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc);
396
397
398int rds_ib_recv_init(void);
399void rds_ib_recv_exit(void);
400int rds_ib_recv_path(struct rds_conn_path *conn);
401int rds_ib_recv_alloc_caches(struct rds_ib_connection *ic, gfp_t gfp);
402void rds_ib_recv_free_caches(struct rds_ib_connection *ic);
403void rds_ib_recv_refill(struct rds_connection *conn, int prefill, gfp_t gfp);
404void rds_ib_inc_free(struct rds_incoming *inc);
405int rds_ib_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to);
406void rds_ib_recv_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc,
407 struct rds_ib_ack_state *state);
408void rds_ib_recv_tasklet_fn(unsigned long data);
409void rds_ib_recv_init_ring(struct rds_ib_connection *ic);
410void rds_ib_recv_clear_ring(struct rds_ib_connection *ic);
411void rds_ib_recv_init_ack(struct rds_ib_connection *ic);
412void rds_ib_attempt_ack(struct rds_ib_connection *ic);
413void rds_ib_ack_send_complete(struct rds_ib_connection *ic);
414u64 rds_ib_piggyb_ack(struct rds_ib_connection *ic);
415void rds_ib_set_ack(struct rds_ib_connection *ic, u64 seq, int ack_required);
416
417
418void rds_ib_ring_init(struct rds_ib_work_ring *ring, u32 nr);
419void rds_ib_ring_resize(struct rds_ib_work_ring *ring, u32 nr);
420u32 rds_ib_ring_alloc(struct rds_ib_work_ring *ring, u32 val, u32 *pos);
421void rds_ib_ring_free(struct rds_ib_work_ring *ring, u32 val);
422void rds_ib_ring_unalloc(struct rds_ib_work_ring *ring, u32 val);
423int rds_ib_ring_empty(struct rds_ib_work_ring *ring);
424int rds_ib_ring_low(struct rds_ib_work_ring *ring);
425u32 rds_ib_ring_oldest(struct rds_ib_work_ring *ring);
426u32 rds_ib_ring_completed(struct rds_ib_work_ring *ring, u32 wr_id, u32 oldest);
427extern wait_queue_head_t rds_ib_ring_empty_wait;
428
429
430void rds_ib_xmit_path_complete(struct rds_conn_path *cp);
431int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
432 unsigned int hdr_off, unsigned int sg, unsigned int off);
433void rds_ib_send_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc);
434void rds_ib_send_init_ring(struct rds_ib_connection *ic);
435void rds_ib_send_clear_ring(struct rds_ib_connection *ic);
436int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op);
437void rds_ib_send_add_credits(struct rds_connection *conn, unsigned int credits);
438void rds_ib_advertise_credits(struct rds_connection *conn, unsigned int posted);
439int rds_ib_send_grab_credits(struct rds_ib_connection *ic, u32 wanted,
440 u32 *adv_credits, int need_posted, int max_posted);
441int rds_ib_xmit_atomic(struct rds_connection *conn, struct rm_atomic_op *op);
442
443
444DECLARE_PER_CPU_SHARED_ALIGNED(struct rds_ib_statistics, rds_ib_stats);
445#define rds_ib_stats_inc(member) rds_stats_inc_which(rds_ib_stats, member)
446#define rds_ib_stats_add(member, count) \
447 rds_stats_add_which(rds_ib_stats, member, count)
448unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
449 unsigned int avail);
450
451
452int rds_ib_sysctl_init(void);
453void rds_ib_sysctl_exit(void);
454extern unsigned long rds_ib_sysctl_max_send_wr;
455extern unsigned long rds_ib_sysctl_max_recv_wr;
456extern unsigned long rds_ib_sysctl_max_unsig_wrs;
457extern unsigned long rds_ib_sysctl_max_unsig_bytes;
458extern unsigned long rds_ib_sysctl_max_recv_allocation;
459extern unsigned int rds_ib_sysctl_flow_control;
460
461#endif
462