1#ifndef _RDS_IB_H
2#define _RDS_IB_H
3
4#include <rdma/ib_verbs.h>
5#include <rdma/rdma_cm.h>
6#include <linux/interrupt.h>
7#include <linux/pci.h>
8#include <linux/slab.h>
9#include "rds.h"
10#include "rdma_transport.h"
11
12#define RDS_FMR_SIZE 256
13#define RDS_FMR_POOL_SIZE 8192
14
15#define RDS_IB_MAX_SGE 8
16#define RDS_IB_RECV_SGE 2
17
18#define RDS_IB_DEFAULT_RECV_WR 1024
19#define RDS_IB_DEFAULT_SEND_WR 256
20
21#define RDS_IB_DEFAULT_RETRY_COUNT 2
22
23#define RDS_IB_SUPPORTED_PROTOCOLS 0x00000003
24
25#define RDS_IB_RECYCLE_BATCH_COUNT 32
26
27extern struct rw_semaphore rds_ib_devices_lock;
28extern struct list_head rds_ib_devices;
29
30
31
32
33
34
35struct rds_page_frag {
36 struct list_head f_item;
37 struct list_head f_cache_entry;
38 struct scatterlist f_sg;
39};
40
41struct rds_ib_incoming {
42 struct list_head ii_frags;
43 struct list_head ii_cache_entry;
44 struct rds_incoming ii_inc;
45};
46
47struct rds_ib_cache_head {
48 struct list_head *first;
49 unsigned long count;
50};
51
52struct rds_ib_refill_cache {
53 struct rds_ib_cache_head __percpu *percpu;
54 struct list_head *xfer;
55 struct list_head *ready;
56};
57
58struct rds_ib_connect_private {
59
60 __be32 dp_saddr;
61 __be32 dp_daddr;
62 u8 dp_protocol_major;
63 u8 dp_protocol_minor;
64 __be16 dp_protocol_minor_mask;
65 __be32 dp_reserved1;
66 __be64 dp_ack_seq;
67 __be32 dp_credit;
68};
69
70struct rds_ib_send_work {
71 void *s_op;
72 struct ib_send_wr s_wr;
73 struct ib_sge s_sge[RDS_IB_MAX_SGE];
74 unsigned long s_queued;
75};
76
77struct rds_ib_recv_work {
78 struct rds_ib_incoming *r_ibinc;
79 struct rds_page_frag *r_frag;
80 struct ib_recv_wr r_wr;
81 struct ib_sge r_sge[2];
82};
83
84struct rds_ib_work_ring {
85 u32 w_nr;
86 u32 w_alloc_ptr;
87 u32 w_alloc_ctr;
88 u32 w_free_ptr;
89 atomic_t w_free_ctr;
90};
91
92struct rds_ib_device;
93
94struct rds_ib_connection {
95
96 struct list_head ib_node;
97 struct rds_ib_device *rds_ibdev;
98 struct rds_connection *conn;
99
100
101 struct rdma_cm_id *i_cm_id;
102 struct ib_pd *i_pd;
103 struct ib_mr *i_mr;
104 struct ib_cq *i_send_cq;
105 struct ib_cq *i_recv_cq;
106
107
108 struct rds_ib_work_ring i_send_ring;
109 struct rm_data_op *i_data_op;
110 struct rds_header *i_send_hdrs;
111 u64 i_send_hdrs_dma;
112 struct rds_ib_send_work *i_sends;
113 atomic_t i_signaled_sends;
114
115
116 struct tasklet_struct i_recv_tasklet;
117 struct mutex i_recv_mutex;
118 struct rds_ib_work_ring i_recv_ring;
119 struct rds_ib_incoming *i_ibinc;
120 u32 i_recv_data_rem;
121 struct rds_header *i_recv_hdrs;
122 u64 i_recv_hdrs_dma;
123 struct rds_ib_recv_work *i_recvs;
124 u64 i_ack_recv;
125 struct rds_ib_refill_cache i_cache_incs;
126 struct rds_ib_refill_cache i_cache_frags;
127
128
129 unsigned long i_ack_flags;
130#ifdef KERNEL_HAS_ATOMIC64
131 atomic64_t i_ack_next;
132#else
133 spinlock_t i_ack_lock;
134 u64 i_ack_next;
135#endif
136 struct rds_header *i_ack;
137 struct ib_send_wr i_ack_wr;
138 struct ib_sge i_ack_sge;
139 u64 i_ack_dma;
140 unsigned long i_ack_queued;
141
142
143
144
145
146
147
148
149
150 atomic_t i_credits;
151
152
153 unsigned int i_flowctl:1;
154
155
156 unsigned int i_unsignaled_wrs;
157};
158
159
160#define IB_GET_SEND_CREDITS(v) ((v) & 0xffff)
161#define IB_GET_POST_CREDITS(v) ((v) >> 16)
162#define IB_SET_SEND_CREDITS(v) ((v) & 0xffff)
163#define IB_SET_POST_CREDITS(v) ((v) << 16)
164
165struct rds_ib_ipaddr {
166 struct list_head list;
167 __be32 ipaddr;
168};
169
170struct rds_ib_device {
171 struct list_head list;
172 struct list_head ipaddr_list;
173 struct list_head conn_list;
174 struct ib_device *dev;
175 struct ib_pd *pd;
176 struct ib_mr *mr;
177 struct rds_ib_mr_pool *mr_pool;
178 unsigned int fmr_max_remaps;
179 unsigned int max_fmrs;
180 int max_sge;
181 unsigned int max_wrs;
182 unsigned int max_initiator_depth;
183 unsigned int max_responder_resources;
184 spinlock_t spinlock;
185 atomic_t refcount;
186 struct work_struct free_work;
187};
188
189#define ibdev_to_node(ibdev) dev_to_node(ibdev->dma_device)
190#define rdsibdev_to_node(rdsibdev) ibdev_to_node(rdsibdev->dev)
191
192
193#define IB_ACK_IN_FLIGHT 0
194#define IB_ACK_REQUESTED 1
195
196
197#define RDS_IB_ACK_WR_ID (~(u64) 0)
198
199struct rds_ib_statistics {
200 uint64_t s_ib_connect_raced;
201 uint64_t s_ib_listen_closed_stale;
202 uint64_t s_ib_tx_cq_call;
203 uint64_t s_ib_tx_cq_event;
204 uint64_t s_ib_tx_ring_full;
205 uint64_t s_ib_tx_throttle;
206 uint64_t s_ib_tx_sg_mapping_failure;
207 uint64_t s_ib_tx_stalled;
208 uint64_t s_ib_tx_credit_updates;
209 uint64_t s_ib_rx_cq_call;
210 uint64_t s_ib_rx_cq_event;
211 uint64_t s_ib_rx_ring_empty;
212 uint64_t s_ib_rx_refill_from_cq;
213 uint64_t s_ib_rx_refill_from_thread;
214 uint64_t s_ib_rx_alloc_limit;
215 uint64_t s_ib_rx_credit_updates;
216 uint64_t s_ib_ack_sent;
217 uint64_t s_ib_ack_send_failure;
218 uint64_t s_ib_ack_send_delayed;
219 uint64_t s_ib_ack_send_piggybacked;
220 uint64_t s_ib_ack_received;
221 uint64_t s_ib_rdma_mr_alloc;
222 uint64_t s_ib_rdma_mr_free;
223 uint64_t s_ib_rdma_mr_used;
224 uint64_t s_ib_rdma_mr_pool_flush;
225 uint64_t s_ib_rdma_mr_pool_wait;
226 uint64_t s_ib_rdma_mr_pool_depleted;
227 uint64_t s_ib_atomic_cswp;
228 uint64_t s_ib_atomic_fadd;
229};
230
231extern struct workqueue_struct *rds_ib_wq;
232
233
234
235
236
237static inline void rds_ib_dma_sync_sg_for_cpu(struct ib_device *dev,
238 struct scatterlist *sg, unsigned int sg_dma_len, int direction)
239{
240 unsigned int i;
241
242 for (i = 0; i < sg_dma_len; ++i) {
243 ib_dma_sync_single_for_cpu(dev,
244 ib_sg_dma_address(dev, &sg[i]),
245 ib_sg_dma_len(dev, &sg[i]),
246 direction);
247 }
248}
249#define ib_dma_sync_sg_for_cpu rds_ib_dma_sync_sg_for_cpu
250
251static inline void rds_ib_dma_sync_sg_for_device(struct ib_device *dev,
252 struct scatterlist *sg, unsigned int sg_dma_len, int direction)
253{
254 unsigned int i;
255
256 for (i = 0; i < sg_dma_len; ++i) {
257 ib_dma_sync_single_for_device(dev,
258 ib_sg_dma_address(dev, &sg[i]),
259 ib_sg_dma_len(dev, &sg[i]),
260 direction);
261 }
262}
263#define ib_dma_sync_sg_for_device rds_ib_dma_sync_sg_for_device
264
265
266
267extern struct rds_transport rds_ib_transport;
268struct rds_ib_device *rds_ib_get_client_data(struct ib_device *device);
269void rds_ib_dev_put(struct rds_ib_device *rds_ibdev);
270extern struct ib_client rds_ib_client;
271
272extern unsigned int fmr_message_size;
273extern unsigned int rds_ib_retry_count;
274
275extern spinlock_t ib_nodev_conns_lock;
276extern struct list_head ib_nodev_conns;
277
278
279int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp);
280void rds_ib_conn_free(void *arg);
281int rds_ib_conn_connect(struct rds_connection *conn);
282void rds_ib_conn_shutdown(struct rds_connection *conn);
283void rds_ib_state_change(struct sock *sk);
284int rds_ib_listen_init(void);
285void rds_ib_listen_stop(void);
286void __rds_ib_conn_error(struct rds_connection *conn, const char *, ...);
287int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id,
288 struct rdma_cm_event *event);
289int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id);
290void rds_ib_cm_connect_complete(struct rds_connection *conn,
291 struct rdma_cm_event *event);
292
293
294#define rds_ib_conn_error(conn, fmt...) \
295 __rds_ib_conn_error(conn, KERN_WARNING "RDS/IB: " fmt)
296
297
298int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev, __be32 ipaddr);
299void rds_ib_add_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
300void rds_ib_remove_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
301void rds_ib_destroy_nodev_conns(void);
302struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *);
303void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev, struct rds_info_rdma_connection *iinfo);
304void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *);
305void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
306 struct rds_sock *rs, u32 *key_ret);
307void rds_ib_sync_mr(void *trans_private, int dir);
308void rds_ib_free_mr(void *trans_private, int invalidate);
309void rds_ib_flush_mrs(void);
310
311
312int rds_ib_recv_init(void);
313void rds_ib_recv_exit(void);
314int rds_ib_recv(struct rds_connection *conn);
315int rds_ib_recv_alloc_caches(struct rds_ib_connection *ic);
316void rds_ib_recv_free_caches(struct rds_ib_connection *ic);
317void rds_ib_recv_refill(struct rds_connection *conn, int prefill);
318void rds_ib_inc_free(struct rds_incoming *inc);
319int rds_ib_inc_copy_to_user(struct rds_incoming *inc, struct iovec *iov,
320 size_t size);
321void rds_ib_recv_cq_comp_handler(struct ib_cq *cq, void *context);
322void rds_ib_recv_tasklet_fn(unsigned long data);
323void rds_ib_recv_init_ring(struct rds_ib_connection *ic);
324void rds_ib_recv_clear_ring(struct rds_ib_connection *ic);
325void rds_ib_recv_init_ack(struct rds_ib_connection *ic);
326void rds_ib_attempt_ack(struct rds_ib_connection *ic);
327void rds_ib_ack_send_complete(struct rds_ib_connection *ic);
328u64 rds_ib_piggyb_ack(struct rds_ib_connection *ic);
329
330
331void rds_ib_ring_init(struct rds_ib_work_ring *ring, u32 nr);
332void rds_ib_ring_resize(struct rds_ib_work_ring *ring, u32 nr);
333u32 rds_ib_ring_alloc(struct rds_ib_work_ring *ring, u32 val, u32 *pos);
334void rds_ib_ring_free(struct rds_ib_work_ring *ring, u32 val);
335void rds_ib_ring_unalloc(struct rds_ib_work_ring *ring, u32 val);
336int rds_ib_ring_empty(struct rds_ib_work_ring *ring);
337int rds_ib_ring_low(struct rds_ib_work_ring *ring);
338u32 rds_ib_ring_oldest(struct rds_ib_work_ring *ring);
339u32 rds_ib_ring_completed(struct rds_ib_work_ring *ring, u32 wr_id, u32 oldest);
340extern wait_queue_head_t rds_ib_ring_empty_wait;
341
342
343char *rds_ib_wc_status_str(enum ib_wc_status status);
344void rds_ib_xmit_complete(struct rds_connection *conn);
345int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
346 unsigned int hdr_off, unsigned int sg, unsigned int off);
347void rds_ib_send_cq_comp_handler(struct ib_cq *cq, void *context);
348void rds_ib_send_init_ring(struct rds_ib_connection *ic);
349void rds_ib_send_clear_ring(struct rds_ib_connection *ic);
350int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op);
351void rds_ib_send_add_credits(struct rds_connection *conn, unsigned int credits);
352void rds_ib_advertise_credits(struct rds_connection *conn, unsigned int posted);
353int rds_ib_send_grab_credits(struct rds_ib_connection *ic, u32 wanted,
354 u32 *adv_credits, int need_posted, int max_posted);
355int rds_ib_xmit_atomic(struct rds_connection *conn, struct rm_atomic_op *op);
356
357
358DECLARE_PER_CPU(struct rds_ib_statistics, rds_ib_stats);
359#define rds_ib_stats_inc(member) rds_stats_inc_which(rds_ib_stats, member)
360unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
361 unsigned int avail);
362
363
364int rds_ib_sysctl_init(void);
365void rds_ib_sysctl_exit(void);
366extern unsigned long rds_ib_sysctl_max_send_wr;
367extern unsigned long rds_ib_sysctl_max_recv_wr;
368extern unsigned long rds_ib_sysctl_max_unsig_wrs;
369extern unsigned long rds_ib_sysctl_max_unsig_bytes;
370extern unsigned long rds_ib_sysctl_max_recv_allocation;
371extern unsigned int rds_ib_sysctl_flow_control;
372
373#endif
374
