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
60struct rds_ib_connect_private {
61
62 __be32 dp_saddr;
63 __be32 dp_daddr;
64 u8 dp_protocol_major;
65 u8 dp_protocol_minor;
66 __be16 dp_protocol_minor_mask;
67 __be32 dp_reserved1;
68 __be64 dp_ack_seq;
69 __be32 dp_credit;
70};
71
72struct rds_ib_send_work {
73 void *s_op;
74 union {
75 struct ib_send_wr s_wr;
76 struct ib_rdma_wr s_rdma_wr;
77 struct ib_atomic_wr s_atomic_wr;
78 };
79 struct ib_sge s_sge[RDS_IB_MAX_SGE];
80 unsigned long s_queued;
81};
82
83struct rds_ib_recv_work {
84 struct rds_ib_incoming *r_ibinc;
85 struct rds_page_frag *r_frag;
86 struct ib_recv_wr r_wr;
87 struct ib_sge r_sge[2];
88};
89
90struct rds_ib_work_ring {
91 u32 w_nr;
92 u32 w_alloc_ptr;
93 u32 w_alloc_ctr;
94 u32 w_free_ptr;
95 atomic_t w_free_ctr;
96};
97
98
99
100
101
102
103struct rds_ib_ack_state {
104 u64 ack_next;
105 u64 ack_recv;
106 unsigned int ack_required:1;
107 unsigned int ack_next_valid:1;
108 unsigned int ack_recv_valid:1;
109};
110
111
112struct rds_ib_device;
113
114struct rds_ib_connection {
115
116 struct list_head ib_node;
117 struct rds_ib_device *rds_ibdev;
118 struct rds_connection *conn;
119
120
121 struct rdma_cm_id *i_cm_id;
122 struct ib_pd *i_pd;
123 struct ib_cq *i_send_cq;
124 struct ib_cq *i_recv_cq;
125 struct ib_wc i_send_wc[RDS_IB_WC_MAX];
126 struct ib_wc i_recv_wc[RDS_IB_WC_MAX];
127
128
129 atomic_t i_fastreg_wrs;
130 atomic_t i_fastunreg_wrs;
131
132
133 struct tasklet_struct i_send_tasklet;
134 struct tasklet_struct i_recv_tasklet;
135
136
137 struct rds_ib_work_ring i_send_ring;
138 struct rm_data_op *i_data_op;
139 struct rds_header *i_send_hdrs;
140 dma_addr_t i_send_hdrs_dma;
141 struct rds_ib_send_work *i_sends;
142 atomic_t i_signaled_sends;
143
144
145 struct mutex i_recv_mutex;
146 struct rds_ib_work_ring i_recv_ring;
147 struct rds_ib_incoming *i_ibinc;
148 u32 i_recv_data_rem;
149 struct rds_header *i_recv_hdrs;
150 dma_addr_t i_recv_hdrs_dma;
151 struct rds_ib_recv_work *i_recvs;
152 u64 i_ack_recv;
153 struct rds_ib_refill_cache i_cache_incs;
154 struct rds_ib_refill_cache i_cache_frags;
155 atomic_t i_cache_allocs;
156
157
158 unsigned long i_ack_flags;
159#ifdef KERNEL_HAS_ATOMIC64
160 atomic64_t i_ack_next;
161#else
162 spinlock_t i_ack_lock;
163 u64 i_ack_next;
164#endif
165 struct rds_header *i_ack;
166 struct ib_send_wr i_ack_wr;
167 struct ib_sge i_ack_sge;
168 dma_addr_t i_ack_dma;
169 unsigned long i_ack_queued;
170
171
172
173
174
175
176
177
178
179 atomic_t i_credits;
180
181
182 unsigned int i_flowctl:1;
183
184
185 unsigned int i_unsignaled_wrs;
186
187
188 bool i_active_side;
189 atomic_t i_cq_quiesce;
190
191
192 int i_scq_vector;
193 int i_rcq_vector;
194};
195
196
197#define IB_GET_SEND_CREDITS(v) ((v) & 0xffff)
198#define IB_GET_POST_CREDITS(v) ((v) >> 16)
199#define IB_SET_SEND_CREDITS(v) ((v) & 0xffff)
200#define IB_SET_POST_CREDITS(v) ((v) << 16)
201
202struct rds_ib_ipaddr {
203 struct list_head list;
204 __be32 ipaddr;
205 struct rcu_head rcu;
206};
207
208enum {
209 RDS_IB_MR_8K_POOL,
210 RDS_IB_MR_1M_POOL,
211};
212
213struct rds_ib_device {
214 struct list_head list;
215 struct list_head ipaddr_list;
216 struct list_head conn_list;
217 struct ib_device *dev;
218 struct ib_pd *pd;
219 bool has_fmr;
220 bool has_fr;
221 bool use_fastreg;
222
223 unsigned int max_mrs;
224 struct rds_ib_mr_pool *mr_1m_pool;
225 struct rds_ib_mr_pool *mr_8k_pool;
226 unsigned int fmr_max_remaps;
227 unsigned int max_8k_mrs;
228 unsigned int max_1m_mrs;
229 int max_sge;
230 unsigned int max_wrs;
231 unsigned int max_initiator_depth;
232 unsigned int max_responder_resources;
233 spinlock_t spinlock;
234 refcount_t refcount;
235 struct work_struct free_work;
236 int *vector_load;
237};
238
239#define ibdev_to_node(ibdev) dev_to_node((ibdev)->dev.parent)
240#define rdsibdev_to_node(rdsibdev) ibdev_to_node(rdsibdev->dev)
241
242
243#define IB_ACK_IN_FLIGHT 0
244#define IB_ACK_REQUESTED 1
245
246
247#define RDS_IB_ACK_WR_ID (~(u64) 0)
248
249struct rds_ib_statistics {
250 uint64_t s_ib_connect_raced;
251 uint64_t s_ib_listen_closed_stale;
252 uint64_t s_ib_evt_handler_call;
253 uint64_t s_ib_tasklet_call;
254 uint64_t s_ib_tx_cq_event;
255 uint64_t s_ib_tx_ring_full;
256 uint64_t s_ib_tx_throttle;
257 uint64_t s_ib_tx_sg_mapping_failure;
258 uint64_t s_ib_tx_stalled;
259 uint64_t s_ib_tx_credit_updates;
260 uint64_t s_ib_rx_cq_event;
261 uint64_t s_ib_rx_ring_empty;
262 uint64_t s_ib_rx_refill_from_cq;
263 uint64_t s_ib_rx_refill_from_thread;
264 uint64_t s_ib_rx_alloc_limit;
265 uint64_t s_ib_rx_total_frags;
266 uint64_t s_ib_rx_total_incs;
267 uint64_t s_ib_rx_credit_updates;
268 uint64_t s_ib_ack_sent;
269 uint64_t s_ib_ack_send_failure;
270 uint64_t s_ib_ack_send_delayed;
271 uint64_t s_ib_ack_send_piggybacked;
272 uint64_t s_ib_ack_received;
273 uint64_t s_ib_rdma_mr_8k_alloc;
274 uint64_t s_ib_rdma_mr_8k_free;
275 uint64_t s_ib_rdma_mr_8k_used;
276 uint64_t s_ib_rdma_mr_8k_pool_flush;
277 uint64_t s_ib_rdma_mr_8k_pool_wait;
278 uint64_t s_ib_rdma_mr_8k_pool_depleted;
279 uint64_t s_ib_rdma_mr_1m_alloc;
280 uint64_t s_ib_rdma_mr_1m_free;
281 uint64_t s_ib_rdma_mr_1m_used;
282 uint64_t s_ib_rdma_mr_1m_pool_flush;
283 uint64_t s_ib_rdma_mr_1m_pool_wait;
284 uint64_t s_ib_rdma_mr_1m_pool_depleted;
285 uint64_t s_ib_rdma_mr_8k_reused;
286 uint64_t s_ib_rdma_mr_1m_reused;
287 uint64_t s_ib_atomic_cswp;
288 uint64_t s_ib_atomic_fadd;
289 uint64_t s_ib_recv_added_to_cache;
290 uint64_t s_ib_recv_removed_from_cache;
291};
292
293extern struct workqueue_struct *rds_ib_wq;
294
295
296
297
298
299static inline void rds_ib_dma_sync_sg_for_cpu(struct ib_device *dev,
300 struct scatterlist *sglist,
301 unsigned int sg_dma_len,
302 int direction)
303{
304 struct scatterlist *sg;
305 unsigned int i;
306
307 for_each_sg(sglist, sg, sg_dma_len, i) {
308 ib_dma_sync_single_for_cpu(dev,
309 ib_sg_dma_address(dev, sg),
310 ib_sg_dma_len(dev, sg),
311 direction);
312 }
313}
314#define ib_dma_sync_sg_for_cpu rds_ib_dma_sync_sg_for_cpu
315
316static inline void rds_ib_dma_sync_sg_for_device(struct ib_device *dev,
317 struct scatterlist *sglist,
318 unsigned int sg_dma_len,
319 int direction)
320{
321 struct scatterlist *sg;
322 unsigned int i;
323
324 for_each_sg(sglist, sg, sg_dma_len, i) {
325 ib_dma_sync_single_for_device(dev,
326 ib_sg_dma_address(dev, sg),
327 ib_sg_dma_len(dev, sg),
328 direction);
329 }
330}
331#define ib_dma_sync_sg_for_device rds_ib_dma_sync_sg_for_device
332
333
334
335extern struct rds_transport rds_ib_transport;
336struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device);
337void rds_ib_dev_put(struct rds_ib_device *rds_ibdev);
338extern struct ib_client rds_ib_client;
339
340extern unsigned int rds_ib_retry_count;
341
342extern spinlock_t ib_nodev_conns_lock;
343extern struct list_head ib_nodev_conns;
344
345
346int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp);
347void rds_ib_conn_free(void *arg);
348int rds_ib_conn_path_connect(struct rds_conn_path *cp);
349void rds_ib_conn_path_shutdown(struct rds_conn_path *cp);
350void rds_ib_state_change(struct sock *sk);
351int rds_ib_listen_init(void);
352void rds_ib_listen_stop(void);
353__printf(2, 3)
354void __rds_ib_conn_error(struct rds_connection *conn, const char *, ...);
355int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id,
356 struct rdma_cm_event *event);
357int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id);
358void rds_ib_cm_connect_complete(struct rds_connection *conn,
359 struct rdma_cm_event *event);
360
361
362#define rds_ib_conn_error(conn, fmt...) \
363 __rds_ib_conn_error(conn, KERN_WARNING "RDS/IB: " fmt)
364
365
366int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev, __be32 ipaddr);
367void rds_ib_add_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
368void rds_ib_remove_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
369void rds_ib_destroy_nodev_conns(void);
370void rds_ib_mr_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc);
371
372
373int rds_ib_recv_init(void);
374void rds_ib_recv_exit(void);
375int rds_ib_recv_path(struct rds_conn_path *conn);
376int rds_ib_recv_alloc_caches(struct rds_ib_connection *ic);
377void rds_ib_recv_free_caches(struct rds_ib_connection *ic);
378void rds_ib_recv_refill(struct rds_connection *conn, int prefill, gfp_t gfp);
379void rds_ib_inc_free(struct rds_incoming *inc);
380int rds_ib_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to);
381void rds_ib_recv_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc,
382 struct rds_ib_ack_state *state);
383void rds_ib_recv_tasklet_fn(unsigned long data);
384void rds_ib_recv_init_ring(struct rds_ib_connection *ic);
385void rds_ib_recv_clear_ring(struct rds_ib_connection *ic);
386void rds_ib_recv_init_ack(struct rds_ib_connection *ic);
387void rds_ib_attempt_ack(struct rds_ib_connection *ic);
388void rds_ib_ack_send_complete(struct rds_ib_connection *ic);
389u64 rds_ib_piggyb_ack(struct rds_ib_connection *ic);
390void rds_ib_set_ack(struct rds_ib_connection *ic, u64 seq, int ack_required);
391
392
393void rds_ib_ring_init(struct rds_ib_work_ring *ring, u32 nr);
394void rds_ib_ring_resize(struct rds_ib_work_ring *ring, u32 nr);
395u32 rds_ib_ring_alloc(struct rds_ib_work_ring *ring, u32 val, u32 *pos);
396void rds_ib_ring_free(struct rds_ib_work_ring *ring, u32 val);
397void rds_ib_ring_unalloc(struct rds_ib_work_ring *ring, u32 val);
398int rds_ib_ring_empty(struct rds_ib_work_ring *ring);
399int rds_ib_ring_low(struct rds_ib_work_ring *ring);
400u32 rds_ib_ring_oldest(struct rds_ib_work_ring *ring);
401u32 rds_ib_ring_completed(struct rds_ib_work_ring *ring, u32 wr_id, u32 oldest);
402extern wait_queue_head_t rds_ib_ring_empty_wait;
403
404
405void rds_ib_xmit_path_complete(struct rds_conn_path *cp);
406int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
407 unsigned int hdr_off, unsigned int sg, unsigned int off);
408void rds_ib_send_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc);
409void rds_ib_send_init_ring(struct rds_ib_connection *ic);
410void rds_ib_send_clear_ring(struct rds_ib_connection *ic);
411int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op);
412void rds_ib_send_add_credits(struct rds_connection *conn, unsigned int credits);
413void rds_ib_advertise_credits(struct rds_connection *conn, unsigned int posted);
414int rds_ib_send_grab_credits(struct rds_ib_connection *ic, u32 wanted,
415 u32 *adv_credits, int need_posted, int max_posted);
416int rds_ib_xmit_atomic(struct rds_connection *conn, struct rm_atomic_op *op);
417
418
419DECLARE_PER_CPU(struct rds_ib_statistics, rds_ib_stats);
420#define rds_ib_stats_inc(member) rds_stats_inc_which(rds_ib_stats, member)
421#define rds_ib_stats_add(member, count) \
422 rds_stats_add_which(rds_ib_stats, member, count)
423unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
424 unsigned int avail);
425
426
427int rds_ib_sysctl_init(void);
428void rds_ib_sysctl_exit(void);
429extern unsigned long rds_ib_sysctl_max_send_wr;
430extern unsigned long rds_ib_sysctl_max_recv_wr;
431extern unsigned long rds_ib_sysctl_max_unsig_wrs;
432extern unsigned long rds_ib_sysctl_max_unsig_bytes;
433extern unsigned long rds_ib_sysctl_max_recv_allocation;
434extern unsigned int rds_ib_sysctl_flow_control;
435
436#endif
437