1#ifndef _RDS_IW_H
2#define _RDS_IW_H
3
4#include <rdma/ib_verbs.h>
5#include <rdma/rdma_cm.h>
6#include "rds.h"
7#include "rdma_transport.h"
8
9#define RDS_FASTREG_SIZE 20
10#define RDS_FASTREG_POOL_SIZE 2048
11
12#define RDS_IW_MAX_SGE 8
13#define RDS_IW_RECV_SGE 2
14
15#define RDS_IW_DEFAULT_RECV_WR 1024
16#define RDS_IW_DEFAULT_SEND_WR 256
17
18#define RDS_IW_SUPPORTED_PROTOCOLS 0x00000003
19
20extern struct list_head rds_iw_devices;
21
22
23
24
25
26
27
28#define RDS_PAGE_LAST_OFF (((PAGE_SIZE / RDS_FRAG_SIZE) - 1) * RDS_FRAG_SIZE)
29struct rds_page_frag {
30 struct list_head f_item;
31 struct page *f_page;
32 unsigned long f_offset;
33 dma_addr_t f_mapped;
34};
35
36struct rds_iw_incoming {
37 struct list_head ii_frags;
38 struct rds_incoming ii_inc;
39};
40
41struct rds_iw_connect_private {
42
43 __be32 dp_saddr;
44 __be32 dp_daddr;
45 u8 dp_protocol_major;
46 u8 dp_protocol_minor;
47 __be16 dp_protocol_minor_mask;
48 __be32 dp_reserved1;
49 __be64 dp_ack_seq;
50 __be32 dp_credit;
51};
52
53struct rds_iw_scatterlist {
54 struct scatterlist *list;
55 unsigned int len;
56 int dma_len;
57 unsigned int dma_npages;
58 unsigned int bytes;
59};
60
61struct rds_iw_mapping {
62 spinlock_t m_lock;
63 struct list_head m_list;
64 struct rds_iw_mr *m_mr;
65 uint32_t m_rkey;
66 struct rds_iw_scatterlist m_sg;
67};
68
69struct rds_iw_send_work {
70 struct rds_message *s_rm;
71
72
73 struct rds_rdma_op *s_op;
74 struct rds_iw_mapping *s_mapping;
75 struct ib_mr *s_mr;
76 struct ib_fast_reg_page_list *s_page_list;
77 unsigned char s_remap_count;
78
79 struct ib_send_wr s_wr;
80 struct ib_sge s_sge[RDS_IW_MAX_SGE];
81 unsigned long s_queued;
82};
83
84struct rds_iw_recv_work {
85 struct rds_iw_incoming *r_iwinc;
86 struct rds_page_frag *r_frag;
87 struct ib_recv_wr r_wr;
88 struct ib_sge r_sge[2];
89};
90
91struct rds_iw_work_ring {
92 u32 w_nr;
93 u32 w_alloc_ptr;
94 u32 w_alloc_ctr;
95 u32 w_free_ptr;
96 atomic_t w_free_ctr;
97};
98
99struct rds_iw_device;
100
101struct rds_iw_connection {
102
103 struct list_head iw_node;
104 struct rds_iw_device *rds_iwdev;
105 struct rds_connection *conn;
106
107
108 struct rdma_cm_id *i_cm_id;
109 struct ib_pd *i_pd;
110 struct ib_mr *i_mr;
111 struct ib_cq *i_send_cq;
112 struct ib_cq *i_recv_cq;
113
114
115 struct rds_iw_work_ring i_send_ring;
116 struct rds_message *i_rm;
117 struct rds_header *i_send_hdrs;
118 u64 i_send_hdrs_dma;
119 struct rds_iw_send_work *i_sends;
120
121
122 struct mutex i_recv_mutex;
123 struct rds_iw_work_ring i_recv_ring;
124 struct rds_iw_incoming *i_iwinc;
125 u32 i_recv_data_rem;
126 struct rds_header *i_recv_hdrs;
127 u64 i_recv_hdrs_dma;
128 struct rds_iw_recv_work *i_recvs;
129 struct rds_page_frag i_frag;
130 u64 i_ack_recv;
131
132
133 unsigned long i_ack_flags;
134#ifdef KERNEL_HAS_ATOMIC64
135 atomic64_t i_ack_next;
136#else
137 spinlock_t i_ack_lock;
138 u64 i_ack_next;
139#endif
140 struct rds_header *i_ack;
141 struct ib_send_wr i_ack_wr;
142 struct ib_sge i_ack_sge;
143 u64 i_ack_dma;
144 unsigned long i_ack_queued;
145
146
147
148
149
150
151
152
153
154 atomic_t i_credits;
155
156
157 unsigned int i_flowctl:1;
158 unsigned int i_dma_local_lkey:1;
159 unsigned int i_fastreg_posted:1;
160
161 unsigned int i_unsignaled_wrs;
162 long i_unsignaled_bytes;
163};
164
165
166#define IB_GET_SEND_CREDITS(v) ((v) & 0xffff)
167#define IB_GET_POST_CREDITS(v) ((v) >> 16)
168#define IB_SET_SEND_CREDITS(v) ((v) & 0xffff)
169#define IB_SET_POST_CREDITS(v) ((v) << 16)
170
171struct rds_iw_cm_id {
172 struct list_head list;
173 struct rdma_cm_id *cm_id;
174};
175
176struct rds_iw_device {
177 struct list_head list;
178 struct list_head cm_id_list;
179 struct list_head conn_list;
180 struct ib_device *dev;
181 struct ib_pd *pd;
182 struct ib_mr *mr;
183 struct rds_iw_mr_pool *mr_pool;
184 int max_sge;
185 unsigned int max_wrs;
186 unsigned int dma_local_lkey:1;
187 spinlock_t spinlock;
188};
189
190
191#define IB_ACK_IN_FLIGHT 0
192#define IB_ACK_REQUESTED 1
193
194
195#define RDS_IW_ACK_WR_ID ((u64)0xffffffffffffffffULL)
196#define RDS_IW_FAST_REG_WR_ID ((u64)0xefefefefefefefefULL)
197#define RDS_IW_LOCAL_INV_WR_ID ((u64)0xdfdfdfdfdfdfdfdfULL)
198
199struct rds_iw_statistics {
200 uint64_t s_iw_connect_raced;
201 uint64_t s_iw_listen_closed_stale;
202 uint64_t s_iw_tx_cq_call;
203 uint64_t s_iw_tx_cq_event;
204 uint64_t s_iw_tx_ring_full;
205 uint64_t s_iw_tx_throttle;
206 uint64_t s_iw_tx_sg_mapping_failure;
207 uint64_t s_iw_tx_stalled;
208 uint64_t s_iw_tx_credit_updates;
209 uint64_t s_iw_rx_cq_call;
210 uint64_t s_iw_rx_cq_event;
211 uint64_t s_iw_rx_ring_empty;
212 uint64_t s_iw_rx_refill_from_cq;
213 uint64_t s_iw_rx_refill_from_thread;
214 uint64_t s_iw_rx_alloc_limit;
215 uint64_t s_iw_rx_credit_updates;
216 uint64_t s_iw_ack_sent;
217 uint64_t s_iw_ack_send_failure;
218 uint64_t s_iw_ack_send_delayed;
219 uint64_t s_iw_ack_send_piggybacked;
220 uint64_t s_iw_ack_received;
221 uint64_t s_iw_rdma_mr_alloc;
222 uint64_t s_iw_rdma_mr_free;
223 uint64_t s_iw_rdma_mr_used;
224 uint64_t s_iw_rdma_mr_pool_flush;
225 uint64_t s_iw_rdma_mr_pool_wait;
226 uint64_t s_iw_rdma_mr_pool_depleted;
227};
228
229extern struct workqueue_struct *rds_iw_wq;
230
231
232
233
234
235static inline void rds_iw_dma_sync_sg_for_cpu(struct ib_device *dev,
236 struct scatterlist *sg, unsigned int sg_dma_len, int direction)
237{
238 unsigned int i;
239
240 for (i = 0; i < sg_dma_len; ++i) {
241 ib_dma_sync_single_for_cpu(dev,
242 ib_sg_dma_address(dev, &sg[i]),
243 ib_sg_dma_len(dev, &sg[i]),
244 direction);
245 }
246}
247#define ib_dma_sync_sg_for_cpu rds_iw_dma_sync_sg_for_cpu
248
249static inline void rds_iw_dma_sync_sg_for_device(struct ib_device *dev,
250 struct scatterlist *sg, unsigned int sg_dma_len, int direction)
251{
252 unsigned int i;
253
254 for (i = 0; i < sg_dma_len; ++i) {
255 ib_dma_sync_single_for_device(dev,
256 ib_sg_dma_address(dev, &sg[i]),
257 ib_sg_dma_len(dev, &sg[i]),
258 direction);
259 }
260}
261#define ib_dma_sync_sg_for_device rds_iw_dma_sync_sg_for_device
262
263static inline u32 rds_iw_local_dma_lkey(struct rds_iw_connection *ic)
264{
265 return ic->i_dma_local_lkey ? ic->i_cm_id->device->local_dma_lkey : ic->i_mr->lkey;
266}
267
268
269extern struct rds_transport rds_iw_transport;
270extern void rds_iw_add_one(struct ib_device *device);
271extern void rds_iw_remove_one(struct ib_device *device);
272extern struct ib_client rds_iw_client;
273
274extern unsigned int fastreg_pool_size;
275extern unsigned int fastreg_message_size;
276
277extern spinlock_t iw_nodev_conns_lock;
278extern struct list_head iw_nodev_conns;
279
280
281int rds_iw_conn_alloc(struct rds_connection *conn, gfp_t gfp);
282void rds_iw_conn_free(void *arg);
283int rds_iw_conn_connect(struct rds_connection *conn);
284void rds_iw_conn_shutdown(struct rds_connection *conn);
285void rds_iw_state_change(struct sock *sk);
286int __init rds_iw_listen_init(void);
287void rds_iw_listen_stop(void);
288void __rds_iw_conn_error(struct rds_connection *conn, const char *, ...);
289int rds_iw_cm_handle_connect(struct rdma_cm_id *cm_id,
290 struct rdma_cm_event *event);
291int rds_iw_cm_initiate_connect(struct rdma_cm_id *cm_id);
292void rds_iw_cm_connect_complete(struct rds_connection *conn,
293 struct rdma_cm_event *event);
294
295
296#define rds_iw_conn_error(conn, fmt...) \
297 __rds_iw_conn_error(conn, KERN_WARNING "RDS/IW: " fmt)
298
299
300int rds_iw_update_cm_id(struct rds_iw_device *rds_iwdev, struct rdma_cm_id *cm_id);
301void rds_iw_add_conn(struct rds_iw_device *rds_iwdev, struct rds_connection *conn);
302void rds_iw_remove_conn(struct rds_iw_device *rds_iwdev, struct rds_connection *conn);
303void __rds_iw_destroy_conns(struct list_head *list, spinlock_t *list_lock);
304static inline void rds_iw_destroy_nodev_conns(void)
305{
306 __rds_iw_destroy_conns(&iw_nodev_conns, &iw_nodev_conns_lock);
307}
308static inline void rds_iw_destroy_conns(struct rds_iw_device *rds_iwdev)
309{
310 __rds_iw_destroy_conns(&rds_iwdev->conn_list, &rds_iwdev->spinlock);
311}
312struct rds_iw_mr_pool *rds_iw_create_mr_pool(struct rds_iw_device *);
313void rds_iw_get_mr_info(struct rds_iw_device *rds_iwdev, struct rds_info_rdma_connection *iinfo);
314void rds_iw_destroy_mr_pool(struct rds_iw_mr_pool *);
315void *rds_iw_get_mr(struct scatterlist *sg, unsigned long nents,
316 struct rds_sock *rs, u32 *key_ret);
317void rds_iw_sync_mr(void *trans_private, int dir);
318void rds_iw_free_mr(void *trans_private, int invalidate);
319void rds_iw_flush_mrs(void);
320void rds_iw_remove_cm_id(struct rds_iw_device *rds_iwdev, struct rdma_cm_id *cm_id);
321
322
323int __init rds_iw_recv_init(void);
324void rds_iw_recv_exit(void);
325int rds_iw_recv(struct rds_connection *conn);
326int rds_iw_recv_refill(struct rds_connection *conn, gfp_t kptr_gfp,
327 gfp_t page_gfp, int prefill);
328void rds_iw_inc_purge(struct rds_incoming *inc);
329void rds_iw_inc_free(struct rds_incoming *inc);
330int rds_iw_inc_copy_to_user(struct rds_incoming *inc, struct iovec *iov,
331 size_t size);
332void rds_iw_recv_cq_comp_handler(struct ib_cq *cq, void *context);
333void rds_iw_recv_init_ring(struct rds_iw_connection *ic);
334void rds_iw_recv_clear_ring(struct rds_iw_connection *ic);
335void rds_iw_recv_init_ack(struct rds_iw_connection *ic);
336void rds_iw_attempt_ack(struct rds_iw_connection *ic);
337void rds_iw_ack_send_complete(struct rds_iw_connection *ic);
338u64 rds_iw_piggyb_ack(struct rds_iw_connection *ic);
339
340
341void rds_iw_ring_init(struct rds_iw_work_ring *ring, u32 nr);
342void rds_iw_ring_resize(struct rds_iw_work_ring *ring, u32 nr);
343u32 rds_iw_ring_alloc(struct rds_iw_work_ring *ring, u32 val, u32 *pos);
344void rds_iw_ring_free(struct rds_iw_work_ring *ring, u32 val);
345void rds_iw_ring_unalloc(struct rds_iw_work_ring *ring, u32 val);
346int rds_iw_ring_empty(struct rds_iw_work_ring *ring);
347int rds_iw_ring_low(struct rds_iw_work_ring *ring);
348u32 rds_iw_ring_oldest(struct rds_iw_work_ring *ring);
349u32 rds_iw_ring_completed(struct rds_iw_work_ring *ring, u32 wr_id, u32 oldest);
350extern wait_queue_head_t rds_iw_ring_empty_wait;
351
352
353void rds_iw_xmit_complete(struct rds_connection *conn);
354int rds_iw_xmit(struct rds_connection *conn, struct rds_message *rm,
355 unsigned int hdr_off, unsigned int sg, unsigned int off);
356void rds_iw_send_cq_comp_handler(struct ib_cq *cq, void *context);
357void rds_iw_send_init_ring(struct rds_iw_connection *ic);
358void rds_iw_send_clear_ring(struct rds_iw_connection *ic);
359int rds_iw_xmit_rdma(struct rds_connection *conn, struct rds_rdma_op *op);
360void rds_iw_send_add_credits(struct rds_connection *conn, unsigned int credits);
361void rds_iw_advertise_credits(struct rds_connection *conn, unsigned int posted);
362int rds_iw_send_grab_credits(struct rds_iw_connection *ic, u32 wanted,
363 u32 *adv_credits, int need_posted, int max_posted);
364
365
366DECLARE_PER_CPU(struct rds_iw_statistics, rds_iw_stats);
367#define rds_iw_stats_inc(member) rds_stats_inc_which(rds_iw_stats, member)
368unsigned int rds_iw_stats_info_copy(struct rds_info_iterator *iter,
369 unsigned int avail);
370
371
372int __init rds_iw_sysctl_init(void);
373void rds_iw_sysctl_exit(void);
374extern unsigned long rds_iw_sysctl_max_send_wr;
375extern unsigned long rds_iw_sysctl_max_recv_wr;
376extern unsigned long rds_iw_sysctl_max_unsig_wrs;
377extern unsigned long rds_iw_sysctl_max_unsig_bytes;
378extern unsigned long rds_iw_sysctl_max_recv_allocation;
379extern unsigned int rds_iw_sysctl_flow_control;
380extern ctl_table rds_iw_sysctl_table[];
381
382
383
384
385
386static inline struct ib_sge *
387rds_iw_header_sge(struct rds_iw_connection *ic, struct ib_sge *sge)
388{
389 return &sge[0];
390}
391
392static inline struct ib_sge *
393rds_iw_data_sge(struct rds_iw_connection *ic, struct ib_sge *sge)
394{
395 return &sge[1];
396}
397
398#endif
399
