1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2 /*
3 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
4 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
5 * Copyright (c) 2004, 2020 Intel Corporation. All rights reserved.
6 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
7 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
8 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
9 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
10 */
11
12 #ifndef IB_VERBS_H
13 #define IB_VERBS_H
14
15 #include <linux/ethtool.h>
16 #include <linux/types.h>
17 #include <linux/device.h>
18 #include <linux/bvec.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/kref.h>
21 #include <linux/list.h>
22 #include <linux/rwsem.h>
23 #include <linux/workqueue.h>
24 #include <linux/irq_poll.h>
25 #include <uapi/linux/if_ether.h>
26 #include <net/ipv6.h>
27 #include <net/ip.h>
28 #include <linux/string.h>
29 #include <linux/slab.h>
30 #include <linux/netdevice.h>
31 #include <linux/refcount.h>
32 #include <linux/if_link.h>
33 #include <linux/atomic.h>
34 #include <linux/mmu_notifier.h>
35 #include <linux/uaccess.h>
36 #include <linux/cgroup_rdma.h>
37 #include <linux/irqflags.h>
38 #include <linux/preempt.h>
39 #include <linux/dim.h>
40 #include <uapi/rdma/ib_user_verbs.h>
41 #include <rdma/rdma_counter.h>
42 #include <rdma/restrack.h>
43 #include <rdma/signature.h>
44 #include <uapi/rdma/rdma_user_ioctl.h>
45 #include <uapi/rdma/ib_user_ioctl_verbs.h>
46 #include <linux/pci-tph.h>
47 #include <linux/dma-buf.h>
48
49 #define IB_FW_VERSION_NAME_MAX ETHTOOL_FWVERS_LEN
50
51 struct ib_umem_odp;
52 struct ib_uqp_object;
53 struct ib_usrq_object;
54 struct ib_uwq_object;
55 struct rdma_cm_id;
56 struct ib_port;
57 struct hw_stats_device_data;
58
59 extern struct workqueue_struct *ib_wq;
60 extern struct workqueue_struct *ib_comp_wq;
61 extern struct workqueue_struct *ib_comp_unbound_wq;
62
63 struct ib_ucq_object;
64
65 __printf(2, 3) __cold
66 void ibdev_emerg(const struct ib_device *ibdev, const char *format, ...);
67 __printf(2, 3) __cold
68 void ibdev_alert(const struct ib_device *ibdev, const char *format, ...);
69 __printf(2, 3) __cold
70 void ibdev_crit(const struct ib_device *ibdev, const char *format, ...);
71 __printf(2, 3) __cold
72 void ibdev_err(const struct ib_device *ibdev, const char *format, ...);
73 __printf(2, 3) __cold
74 void ibdev_warn(const struct ib_device *ibdev, const char *format, ...);
75 __printf(2, 3) __cold
76 void ibdev_notice(const struct ib_device *ibdev, const char *format, ...);
77 __printf(2, 3) __cold
78 void ibdev_info(const struct ib_device *ibdev, const char *format, ...);
79
80 #if defined(CONFIG_DYNAMIC_DEBUG) || \
81 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
82 #define ibdev_dbg(__dev, format, args...) \
83 dynamic_ibdev_dbg(__dev, format, ##args)
84 #else
85 __printf(2, 3) __cold
86 static inline
ibdev_dbg(const struct ib_device * ibdev,const char * format,...)87 void ibdev_dbg(const struct ib_device *ibdev, const char *format, ...) {}
88 #endif
89
90 #define ibdev_level_ratelimited(ibdev_level, ibdev, fmt, ...) \
91 do { \
92 static DEFINE_RATELIMIT_STATE(_rs, \
93 DEFAULT_RATELIMIT_INTERVAL, \
94 DEFAULT_RATELIMIT_BURST); \
95 if (__ratelimit(&_rs)) \
96 ibdev_level(ibdev, fmt, ##__VA_ARGS__); \
97 } while (0)
98
99 #define ibdev_emerg_ratelimited(ibdev, fmt, ...) \
100 ibdev_level_ratelimited(ibdev_emerg, ibdev, fmt, ##__VA_ARGS__)
101 #define ibdev_alert_ratelimited(ibdev, fmt, ...) \
102 ibdev_level_ratelimited(ibdev_alert, ibdev, fmt, ##__VA_ARGS__)
103 #define ibdev_crit_ratelimited(ibdev, fmt, ...) \
104 ibdev_level_ratelimited(ibdev_crit, ibdev, fmt, ##__VA_ARGS__)
105 #define ibdev_err_ratelimited(ibdev, fmt, ...) \
106 ibdev_level_ratelimited(ibdev_err, ibdev, fmt, ##__VA_ARGS__)
107 #define ibdev_warn_ratelimited(ibdev, fmt, ...) \
108 ibdev_level_ratelimited(ibdev_warn, ibdev, fmt, ##__VA_ARGS__)
109 #define ibdev_notice_ratelimited(ibdev, fmt, ...) \
110 ibdev_level_ratelimited(ibdev_notice, ibdev, fmt, ##__VA_ARGS__)
111 #define ibdev_info_ratelimited(ibdev, fmt, ...) \
112 ibdev_level_ratelimited(ibdev_info, ibdev, fmt, ##__VA_ARGS__)
113
114 #if defined(CONFIG_DYNAMIC_DEBUG) || \
115 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
116 /* descriptor check is first to prevent flooding with "callbacks suppressed" */
117 #define ibdev_dbg_ratelimited(ibdev, fmt, ...) \
118 do { \
119 static DEFINE_RATELIMIT_STATE(_rs, \
120 DEFAULT_RATELIMIT_INTERVAL, \
121 DEFAULT_RATELIMIT_BURST); \
122 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
123 if (DYNAMIC_DEBUG_BRANCH(descriptor) && __ratelimit(&_rs)) \
124 __dynamic_ibdev_dbg(&descriptor, ibdev, fmt, \
125 ##__VA_ARGS__); \
126 } while (0)
127 #else
128 __printf(2, 3) __cold
129 static inline
ibdev_dbg_ratelimited(const struct ib_device * ibdev,const char * format,...)130 void ibdev_dbg_ratelimited(const struct ib_device *ibdev, const char *format, ...) {}
131 #endif
132
133 union ib_gid {
134 u8 raw[16];
135 struct {
136 __be64 subnet_prefix;
137 __be64 interface_id;
138 } global;
139 };
140
141 extern union ib_gid zgid;
142
143 enum ib_gid_type {
144 IB_GID_TYPE_IB = IB_UVERBS_GID_TYPE_IB,
145 IB_GID_TYPE_ROCE = IB_UVERBS_GID_TYPE_ROCE_V1,
146 IB_GID_TYPE_ROCE_UDP_ENCAP = IB_UVERBS_GID_TYPE_ROCE_V2,
147 IB_GID_TYPE_SIZE
148 };
149
150 #define ROCE_V2_UDP_DPORT 4791
151 struct ib_gid_attr {
152 struct net_device __rcu *ndev;
153 struct ib_device *device;
154 union ib_gid gid;
155 enum ib_gid_type gid_type;
156 u16 index;
157 u32 port_num;
158 };
159
160 enum {
161 /* set the local administered indication */
162 IB_SA_WELL_KNOWN_GUID = BIT_ULL(57) | 2,
163 };
164
165 enum rdma_transport_type {
166 RDMA_TRANSPORT_IB,
167 RDMA_TRANSPORT_IWARP,
168 RDMA_TRANSPORT_USNIC,
169 RDMA_TRANSPORT_USNIC_UDP,
170 RDMA_TRANSPORT_UNSPECIFIED,
171 };
172
173 enum rdma_protocol_type {
174 RDMA_PROTOCOL_IB,
175 RDMA_PROTOCOL_IBOE,
176 RDMA_PROTOCOL_IWARP,
177 RDMA_PROTOCOL_USNIC_UDP
178 };
179
180 __attribute_const__ enum rdma_transport_type
181 rdma_node_get_transport(unsigned int node_type);
182
183 enum rdma_network_type {
184 RDMA_NETWORK_IB,
185 RDMA_NETWORK_ROCE_V1,
186 RDMA_NETWORK_IPV4,
187 RDMA_NETWORK_IPV6
188 };
189
ib_network_to_gid_type(enum rdma_network_type network_type)190 static inline enum ib_gid_type ib_network_to_gid_type(enum rdma_network_type network_type)
191 {
192 if (network_type == RDMA_NETWORK_IPV4 ||
193 network_type == RDMA_NETWORK_IPV6)
194 return IB_GID_TYPE_ROCE_UDP_ENCAP;
195 else if (network_type == RDMA_NETWORK_ROCE_V1)
196 return IB_GID_TYPE_ROCE;
197 else
198 return IB_GID_TYPE_IB;
199 }
200
201 static inline enum rdma_network_type
rdma_gid_attr_network_type(const struct ib_gid_attr * attr)202 rdma_gid_attr_network_type(const struct ib_gid_attr *attr)
203 {
204 if (attr->gid_type == IB_GID_TYPE_IB)
205 return RDMA_NETWORK_IB;
206
207 if (attr->gid_type == IB_GID_TYPE_ROCE)
208 return RDMA_NETWORK_ROCE_V1;
209
210 if (ipv6_addr_v4mapped((struct in6_addr *)&attr->gid))
211 return RDMA_NETWORK_IPV4;
212 else
213 return RDMA_NETWORK_IPV6;
214 }
215
216 enum rdma_link_layer {
217 IB_LINK_LAYER_UNSPECIFIED,
218 IB_LINK_LAYER_INFINIBAND,
219 IB_LINK_LAYER_ETHERNET,
220 };
221
222 enum ib_device_cap_flags {
223 IB_DEVICE_RESIZE_MAX_WR = IB_UVERBS_DEVICE_RESIZE_MAX_WR,
224 IB_DEVICE_BAD_PKEY_CNTR = IB_UVERBS_DEVICE_BAD_PKEY_CNTR,
225 IB_DEVICE_BAD_QKEY_CNTR = IB_UVERBS_DEVICE_BAD_QKEY_CNTR,
226 IB_DEVICE_RAW_MULTI = IB_UVERBS_DEVICE_RAW_MULTI,
227 IB_DEVICE_AUTO_PATH_MIG = IB_UVERBS_DEVICE_AUTO_PATH_MIG,
228 IB_DEVICE_CHANGE_PHY_PORT = IB_UVERBS_DEVICE_CHANGE_PHY_PORT,
229 IB_DEVICE_UD_AV_PORT_ENFORCE = IB_UVERBS_DEVICE_UD_AV_PORT_ENFORCE,
230 IB_DEVICE_CURR_QP_STATE_MOD = IB_UVERBS_DEVICE_CURR_QP_STATE_MOD,
231 IB_DEVICE_SHUTDOWN_PORT = IB_UVERBS_DEVICE_SHUTDOWN_PORT,
232 /* IB_DEVICE_INIT_TYPE = IB_UVERBS_DEVICE_INIT_TYPE, (not in use) */
233 IB_DEVICE_PORT_ACTIVE_EVENT = IB_UVERBS_DEVICE_PORT_ACTIVE_EVENT,
234 IB_DEVICE_SYS_IMAGE_GUID = IB_UVERBS_DEVICE_SYS_IMAGE_GUID,
235 IB_DEVICE_RC_RNR_NAK_GEN = IB_UVERBS_DEVICE_RC_RNR_NAK_GEN,
236 IB_DEVICE_SRQ_RESIZE = IB_UVERBS_DEVICE_SRQ_RESIZE,
237 IB_DEVICE_N_NOTIFY_CQ = IB_UVERBS_DEVICE_N_NOTIFY_CQ,
238
239 /* Reserved, old SEND_W_INV = 1 << 16,*/
240 IB_DEVICE_MEM_WINDOW = IB_UVERBS_DEVICE_MEM_WINDOW,
241 /*
242 * Devices should set IB_DEVICE_UD_IP_SUM if they support
243 * insertion of UDP and TCP checksum on outgoing UD IPoIB
244 * messages and can verify the validity of checksum for
245 * incoming messages. Setting this flag implies that the
246 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
247 */
248 IB_DEVICE_UD_IP_CSUM = IB_UVERBS_DEVICE_UD_IP_CSUM,
249 IB_DEVICE_XRC = IB_UVERBS_DEVICE_XRC,
250
251 /*
252 * This device supports the IB "base memory management extension",
253 * which includes support for fast registrations (IB_WR_REG_MR,
254 * IB_WR_LOCAL_INV and IB_WR_SEND_WITH_INV verbs). This flag should
255 * also be set by any iWarp device which must support FRs to comply
256 * to the iWarp verbs spec. iWarp devices also support the
257 * IB_WR_RDMA_READ_WITH_INV verb for RDMA READs that invalidate the
258 * stag.
259 */
260 IB_DEVICE_MEM_MGT_EXTENSIONS = IB_UVERBS_DEVICE_MEM_MGT_EXTENSIONS,
261 IB_DEVICE_MEM_WINDOW_TYPE_2A = IB_UVERBS_DEVICE_MEM_WINDOW_TYPE_2A,
262 IB_DEVICE_MEM_WINDOW_TYPE_2B = IB_UVERBS_DEVICE_MEM_WINDOW_TYPE_2B,
263 IB_DEVICE_RC_IP_CSUM = IB_UVERBS_DEVICE_RC_IP_CSUM,
264 /* Deprecated. Please use IB_RAW_PACKET_CAP_IP_CSUM. */
265 IB_DEVICE_RAW_IP_CSUM = IB_UVERBS_DEVICE_RAW_IP_CSUM,
266 IB_DEVICE_MANAGED_FLOW_STEERING =
267 IB_UVERBS_DEVICE_MANAGED_FLOW_STEERING,
268 /* Deprecated. Please use IB_RAW_PACKET_CAP_SCATTER_FCS. */
269 IB_DEVICE_RAW_SCATTER_FCS = IB_UVERBS_DEVICE_RAW_SCATTER_FCS,
270 /* The device supports padding incoming writes to cacheline. */
271 IB_DEVICE_PCI_WRITE_END_PADDING =
272 IB_UVERBS_DEVICE_PCI_WRITE_END_PADDING,
273 /* Placement type attributes */
274 IB_DEVICE_FLUSH_GLOBAL = IB_UVERBS_DEVICE_FLUSH_GLOBAL,
275 IB_DEVICE_FLUSH_PERSISTENT = IB_UVERBS_DEVICE_FLUSH_PERSISTENT,
276 IB_DEVICE_ATOMIC_WRITE = IB_UVERBS_DEVICE_ATOMIC_WRITE,
277 };
278
279 enum ib_kernel_cap_flags {
280 /*
281 * This device supports a per-device lkey or stag that can be
282 * used without performing a memory registration for the local
283 * memory. Note that ULPs should never check this flag, but
284 * instead of use the local_dma_lkey flag in the ib_pd structure,
285 * which will always contain a usable lkey.
286 */
287 IBK_LOCAL_DMA_LKEY = 1 << 0,
288 /* IB_QP_CREATE_INTEGRITY_EN is supported to implement T10-PI */
289 IBK_INTEGRITY_HANDOVER = 1 << 1,
290 /* IB_ACCESS_ON_DEMAND is supported during reg_user_mr() */
291 IBK_ON_DEMAND_PAGING = 1 << 2,
292 /* IB_MR_TYPE_SG_GAPS is supported */
293 IBK_SG_GAPS_REG = 1 << 3,
294 /* Driver supports RDMA_NLDEV_CMD_DELLINK */
295 IBK_ALLOW_USER_UNREG = 1 << 4,
296
297 /* ipoib will use IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK */
298 IBK_BLOCK_MULTICAST_LOOPBACK = 1 << 5,
299 /* iopib will use IB_QP_CREATE_IPOIB_UD_LSO for its QPs */
300 IBK_UD_TSO = 1 << 6,
301 /* iopib will use the device ops:
302 * get_vf_config
303 * get_vf_guid
304 * get_vf_stats
305 * set_vf_guid
306 * set_vf_link_state
307 */
308 IBK_VIRTUAL_FUNCTION = 1 << 7,
309 /* ipoib will use IB_QP_CREATE_NETDEV_USE for its QPs */
310 IBK_RDMA_NETDEV_OPA = 1 << 8,
311 };
312
313 enum ib_atomic_cap {
314 IB_ATOMIC_NONE,
315 IB_ATOMIC_HCA,
316 IB_ATOMIC_GLOB
317 };
318
319 enum ib_odp_general_cap_bits {
320 IB_ODP_SUPPORT = IB_UVERBS_ODP_SUPPORT,
321 IB_ODP_SUPPORT_IMPLICIT = IB_UVERBS_ODP_SUPPORT_IMPLICIT,
322 };
323
324 enum ib_odp_transport_cap_bits {
325 IB_ODP_SUPPORT_SEND = IB_UVERBS_ODP_SUPPORT_SEND,
326 IB_ODP_SUPPORT_RECV = IB_UVERBS_ODP_SUPPORT_RECV,
327 IB_ODP_SUPPORT_WRITE = IB_UVERBS_ODP_SUPPORT_WRITE,
328 IB_ODP_SUPPORT_READ = IB_UVERBS_ODP_SUPPORT_READ,
329 IB_ODP_SUPPORT_ATOMIC = IB_UVERBS_ODP_SUPPORT_ATOMIC,
330 IB_ODP_SUPPORT_SRQ_RECV = IB_UVERBS_ODP_SUPPORT_SRQ_RECV,
331 IB_ODP_SUPPORT_FLUSH = IB_UVERBS_ODP_SUPPORT_FLUSH,
332 IB_ODP_SUPPORT_ATOMIC_WRITE = IB_UVERBS_ODP_SUPPORT_ATOMIC_WRITE,
333 };
334
335 struct ib_odp_caps {
336 uint64_t general_caps;
337 struct {
338 uint32_t rc_odp_caps;
339 uint32_t uc_odp_caps;
340 uint32_t ud_odp_caps;
341 uint32_t xrc_odp_caps;
342 } per_transport_caps;
343 };
344
345 struct ib_rss_caps {
346 /* Corresponding bit will be set if qp type from
347 * 'enum ib_qp_type' is supported, e.g.
348 * supported_qpts |= 1 << IB_QPT_UD
349 */
350 u32 supported_qpts;
351 u32 max_rwq_indirection_tables;
352 u32 max_rwq_indirection_table_size;
353 };
354
355 enum ib_tm_cap_flags {
356 /* Support tag matching with rendezvous offload for RC transport */
357 IB_TM_CAP_RNDV_RC = 1 << 0,
358 };
359
360 struct ib_tm_caps {
361 /* Max size of RNDV header */
362 u32 max_rndv_hdr_size;
363 /* Max number of entries in tag matching list */
364 u32 max_num_tags;
365 /* From enum ib_tm_cap_flags */
366 u32 flags;
367 /* Max number of outstanding list operations */
368 u32 max_ops;
369 /* Max number of SGE in tag matching entry */
370 u32 max_sge;
371 };
372
373 struct ib_cq_init_attr {
374 unsigned int cqe;
375 u32 comp_vector;
376 u32 flags;
377 };
378
379 enum ib_cq_attr_mask {
380 IB_CQ_MODERATE = 1 << 0,
381 };
382
383 struct ib_cq_caps {
384 u16 max_cq_moderation_count;
385 u16 max_cq_moderation_period;
386 };
387
388 struct ib_dm_mr_attr {
389 u64 length;
390 u64 offset;
391 u32 access_flags;
392 };
393
394 struct ib_dm_alloc_attr {
395 u64 length;
396 u32 alignment;
397 u32 flags;
398 };
399
400 struct ib_device_attr {
401 u64 fw_ver;
402 __be64 sys_image_guid;
403 u64 max_mr_size;
404 u64 page_size_cap;
405 u32 vendor_id;
406 u32 vendor_part_id;
407 u32 hw_ver;
408 int max_qp;
409 int max_qp_wr;
410 u64 device_cap_flags;
411 u64 kernel_cap_flags;
412 int max_send_sge;
413 int max_recv_sge;
414 int max_sge_rd;
415 int max_cq;
416 int max_cqe;
417 int max_mr;
418 int max_pd;
419 int max_qp_rd_atom;
420 int max_ee_rd_atom;
421 int max_res_rd_atom;
422 int max_qp_init_rd_atom;
423 int max_ee_init_rd_atom;
424 enum ib_atomic_cap atomic_cap;
425 enum ib_atomic_cap masked_atomic_cap;
426 int max_ee;
427 int max_rdd;
428 int max_mw;
429 int max_raw_ipv6_qp;
430 int max_raw_ethy_qp;
431 int max_mcast_grp;
432 int max_mcast_qp_attach;
433 int max_total_mcast_qp_attach;
434 int max_ah;
435 int max_srq;
436 int max_srq_wr;
437 int max_srq_sge;
438 unsigned int max_fast_reg_page_list_len;
439 unsigned int max_pi_fast_reg_page_list_len;
440 u16 max_pkeys;
441 u8 local_ca_ack_delay;
442 int sig_prot_cap;
443 int sig_guard_cap;
444 struct ib_odp_caps odp_caps;
445 uint64_t timestamp_mask;
446 uint64_t hca_core_clock; /* in KHZ */
447 struct ib_rss_caps rss_caps;
448 u32 max_wq_type_rq;
449 u32 raw_packet_caps; /* Use ib_raw_packet_caps enum */
450 struct ib_tm_caps tm_caps;
451 struct ib_cq_caps cq_caps;
452 u64 max_dm_size;
453 /* Max entries for sgl for optimized performance per READ */
454 u32 max_sgl_rd;
455 };
456
457 enum ib_mtu {
458 IB_MTU_256 = 1,
459 IB_MTU_512 = 2,
460 IB_MTU_1024 = 3,
461 IB_MTU_2048 = 4,
462 IB_MTU_4096 = 5
463 };
464
465 enum opa_mtu {
466 OPA_MTU_8192 = 6,
467 OPA_MTU_10240 = 7
468 };
469
ib_mtu_enum_to_int(enum ib_mtu mtu)470 static inline int ib_mtu_enum_to_int(enum ib_mtu mtu)
471 {
472 switch (mtu) {
473 case IB_MTU_256: return 256;
474 case IB_MTU_512: return 512;
475 case IB_MTU_1024: return 1024;
476 case IB_MTU_2048: return 2048;
477 case IB_MTU_4096: return 4096;
478 default: return -1;
479 }
480 }
481
ib_mtu_int_to_enum(int mtu)482 static inline enum ib_mtu ib_mtu_int_to_enum(int mtu)
483 {
484 if (mtu >= 4096)
485 return IB_MTU_4096;
486 else if (mtu >= 2048)
487 return IB_MTU_2048;
488 else if (mtu >= 1024)
489 return IB_MTU_1024;
490 else if (mtu >= 512)
491 return IB_MTU_512;
492 else
493 return IB_MTU_256;
494 }
495
opa_mtu_enum_to_int(enum opa_mtu mtu)496 static inline int opa_mtu_enum_to_int(enum opa_mtu mtu)
497 {
498 switch (mtu) {
499 case OPA_MTU_8192:
500 return 8192;
501 case OPA_MTU_10240:
502 return 10240;
503 default:
504 return(ib_mtu_enum_to_int((enum ib_mtu)mtu));
505 }
506 }
507
opa_mtu_int_to_enum(int mtu)508 static inline enum opa_mtu opa_mtu_int_to_enum(int mtu)
509 {
510 if (mtu >= 10240)
511 return OPA_MTU_10240;
512 else if (mtu >= 8192)
513 return OPA_MTU_8192;
514 else
515 return ((enum opa_mtu)ib_mtu_int_to_enum(mtu));
516 }
517
518 enum ib_port_state {
519 IB_PORT_NOP = 0,
520 IB_PORT_DOWN = 1,
521 IB_PORT_INIT = 2,
522 IB_PORT_ARMED = 3,
523 IB_PORT_ACTIVE = 4,
524 IB_PORT_ACTIVE_DEFER = 5
525 };
526
527 static inline const char *__attribute_const__
ib_port_state_to_str(enum ib_port_state state)528 ib_port_state_to_str(enum ib_port_state state)
529 {
530 const char * const states[] = {
531 [IB_PORT_NOP] = "NOP",
532 [IB_PORT_DOWN] = "DOWN",
533 [IB_PORT_INIT] = "INIT",
534 [IB_PORT_ARMED] = "ARMED",
535 [IB_PORT_ACTIVE] = "ACTIVE",
536 [IB_PORT_ACTIVE_DEFER] = "ACTIVE_DEFER",
537 };
538
539 if (state < ARRAY_SIZE(states))
540 return states[state];
541 return "UNKNOWN";
542 }
543
544 enum ib_port_phys_state {
545 IB_PORT_PHYS_STATE_SLEEP = 1,
546 IB_PORT_PHYS_STATE_POLLING = 2,
547 IB_PORT_PHYS_STATE_DISABLED = 3,
548 IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING = 4,
549 IB_PORT_PHYS_STATE_LINK_UP = 5,
550 IB_PORT_PHYS_STATE_LINK_ERROR_RECOVERY = 6,
551 IB_PORT_PHYS_STATE_PHY_TEST = 7,
552 };
553
554 enum ib_port_width {
555 IB_WIDTH_1X = 1,
556 IB_WIDTH_2X = 16,
557 IB_WIDTH_4X = 2,
558 IB_WIDTH_8X = 4,
559 IB_WIDTH_12X = 8
560 };
561
ib_width_enum_to_int(enum ib_port_width width)562 static inline int ib_width_enum_to_int(enum ib_port_width width)
563 {
564 switch (width) {
565 case IB_WIDTH_1X: return 1;
566 case IB_WIDTH_2X: return 2;
567 case IB_WIDTH_4X: return 4;
568 case IB_WIDTH_8X: return 8;
569 case IB_WIDTH_12X: return 12;
570 default: return -1;
571 }
572 }
573
574 enum ib_port_speed {
575 IB_SPEED_SDR = 1,
576 IB_SPEED_DDR = 2,
577 IB_SPEED_QDR = 4,
578 IB_SPEED_FDR10 = 8,
579 IB_SPEED_FDR = 16,
580 IB_SPEED_EDR = 32,
581 IB_SPEED_HDR = 64,
582 IB_SPEED_NDR = 128,
583 IB_SPEED_XDR = 256,
584 };
585
586 enum ib_stat_flag {
587 IB_STAT_FLAG_OPTIONAL = 1 << 0,
588 };
589
590 /**
591 * struct rdma_stat_desc - description of one rdma stat/counter
592 * @name: The name of the counter
593 * @flags: Flags of the counter; For example, IB_STAT_FLAG_OPTIONAL
594 * @priv: Driver private information; Core code should not use
595 */
596 struct rdma_stat_desc {
597 const char *name;
598 unsigned int flags;
599 const void *priv;
600 };
601
602 /**
603 * struct rdma_hw_stats - collection of hardware stats and their management
604 * @lock: Mutex to protect parallel write access to lifespan and values
605 * of counters, which are 64bits and not guaranteed to be written
606 * atomicaly on 32bits systems.
607 * @timestamp: Used by the core code to track when the last update was
608 * @lifespan: Used by the core code to determine how old the counters
609 * should be before being updated again. Stored in jiffies, defaults
610 * to 10 milliseconds, drivers can override the default be specifying
611 * their own value during their allocation routine.
612 * @descs: Array of pointers to static descriptors used for the counters
613 * in directory.
614 * @is_disabled: A bitmap to indicate each counter is currently disabled
615 * or not.
616 * @num_counters: How many hardware counters there are. If name is
617 * shorter than this number, a kernel oops will result. Driver authors
618 * are encouraged to leave BUILD_BUG_ON(ARRAY_SIZE(@name) < num_counters)
619 * in their code to prevent this.
620 * @value: Array of u64 counters that are accessed by the sysfs code and
621 * filled in by the drivers get_stats routine
622 */
623 struct rdma_hw_stats {
624 struct mutex lock; /* Protect lifespan and values[] */
625 unsigned long timestamp;
626 unsigned long lifespan;
627 const struct rdma_stat_desc *descs;
628 unsigned long *is_disabled;
629 int num_counters;
630 u64 value[] __counted_by(num_counters);
631 };
632
633 #define RDMA_HW_STATS_DEFAULT_LIFESPAN 10
634
635 struct rdma_hw_stats *rdma_alloc_hw_stats_struct(
636 const struct rdma_stat_desc *descs, int num_counters,
637 unsigned long lifespan);
638
639 void rdma_free_hw_stats_struct(struct rdma_hw_stats *stats);
640
641 /* Define bits for the various functionality this port needs to be supported by
642 * the core.
643 */
644 /* Management 0x00000FFF */
645 #define RDMA_CORE_CAP_IB_MAD 0x00000001
646 #define RDMA_CORE_CAP_IB_SMI 0x00000002
647 #define RDMA_CORE_CAP_IB_CM 0x00000004
648 #define RDMA_CORE_CAP_IW_CM 0x00000008
649 #define RDMA_CORE_CAP_IB_SA 0x00000010
650 #define RDMA_CORE_CAP_OPA_MAD 0x00000020
651
652 /* Address format 0x000FF000 */
653 #define RDMA_CORE_CAP_AF_IB 0x00001000
654 #define RDMA_CORE_CAP_ETH_AH 0x00002000
655 #define RDMA_CORE_CAP_OPA_AH 0x00004000
656 #define RDMA_CORE_CAP_IB_GRH_REQUIRED 0x00008000
657
658 /* Protocol 0xFFF00000 */
659 #define RDMA_CORE_CAP_PROT_IB 0x00100000
660 #define RDMA_CORE_CAP_PROT_ROCE 0x00200000
661 #define RDMA_CORE_CAP_PROT_IWARP 0x00400000
662 #define RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP 0x00800000
663 #define RDMA_CORE_CAP_PROT_RAW_PACKET 0x01000000
664 #define RDMA_CORE_CAP_PROT_USNIC 0x02000000
665
666 #define RDMA_CORE_PORT_IB_GRH_REQUIRED (RDMA_CORE_CAP_IB_GRH_REQUIRED \
667 | RDMA_CORE_CAP_PROT_ROCE \
668 | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP)
669
670 #define RDMA_CORE_PORT_IBA_IB (RDMA_CORE_CAP_PROT_IB \
671 | RDMA_CORE_CAP_IB_MAD \
672 | RDMA_CORE_CAP_IB_SMI \
673 | RDMA_CORE_CAP_IB_CM \
674 | RDMA_CORE_CAP_IB_SA \
675 | RDMA_CORE_CAP_AF_IB)
676 #define RDMA_CORE_PORT_IBA_ROCE (RDMA_CORE_CAP_PROT_ROCE \
677 | RDMA_CORE_CAP_IB_MAD \
678 | RDMA_CORE_CAP_IB_CM \
679 | RDMA_CORE_CAP_AF_IB \
680 | RDMA_CORE_CAP_ETH_AH)
681 #define RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP \
682 (RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP \
683 | RDMA_CORE_CAP_IB_MAD \
684 | RDMA_CORE_CAP_IB_CM \
685 | RDMA_CORE_CAP_AF_IB \
686 | RDMA_CORE_CAP_ETH_AH)
687 #define RDMA_CORE_PORT_IWARP (RDMA_CORE_CAP_PROT_IWARP \
688 | RDMA_CORE_CAP_IW_CM)
689 #define RDMA_CORE_PORT_INTEL_OPA (RDMA_CORE_PORT_IBA_IB \
690 | RDMA_CORE_CAP_OPA_MAD)
691
692 #define RDMA_CORE_PORT_RAW_PACKET (RDMA_CORE_CAP_PROT_RAW_PACKET)
693
694 #define RDMA_CORE_PORT_USNIC (RDMA_CORE_CAP_PROT_USNIC)
695
696 struct ib_port_attr {
697 u64 subnet_prefix;
698 enum ib_port_state state;
699 enum ib_mtu max_mtu;
700 enum ib_mtu active_mtu;
701 u32 phys_mtu;
702 int gid_tbl_len;
703 unsigned int ip_gids:1;
704 /* This is the value from PortInfo CapabilityMask, defined by IBA */
705 u32 port_cap_flags;
706 u32 max_msg_sz;
707 u32 bad_pkey_cntr;
708 u32 qkey_viol_cntr;
709 u16 pkey_tbl_len;
710 u32 sm_lid;
711 u32 lid;
712 u8 lmc;
713 u8 max_vl_num;
714 u8 sm_sl;
715 u8 subnet_timeout;
716 u8 init_type_reply;
717 u8 active_width;
718 u16 active_speed;
719 u8 phys_state;
720 u16 port_cap_flags2;
721 };
722
723 enum ib_device_modify_flags {
724 IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0,
725 IB_DEVICE_MODIFY_NODE_DESC = 1 << 1
726 };
727
728 #define IB_DEVICE_NODE_DESC_MAX 64
729
730 struct ib_device_modify {
731 u64 sys_image_guid;
732 char node_desc[IB_DEVICE_NODE_DESC_MAX];
733 };
734
735 enum ib_port_modify_flags {
736 IB_PORT_SHUTDOWN = 1,
737 IB_PORT_INIT_TYPE = (1<<2),
738 IB_PORT_RESET_QKEY_CNTR = (1<<3),
739 IB_PORT_OPA_MASK_CHG = (1<<4)
740 };
741
742 struct ib_port_modify {
743 u32 set_port_cap_mask;
744 u32 clr_port_cap_mask;
745 u8 init_type;
746 };
747
748 enum ib_event_type {
749 IB_EVENT_CQ_ERR,
750 IB_EVENT_QP_FATAL,
751 IB_EVENT_QP_REQ_ERR,
752 IB_EVENT_QP_ACCESS_ERR,
753 IB_EVENT_COMM_EST,
754 IB_EVENT_SQ_DRAINED,
755 IB_EVENT_PATH_MIG,
756 IB_EVENT_PATH_MIG_ERR,
757 IB_EVENT_DEVICE_FATAL,
758 IB_EVENT_PORT_ACTIVE,
759 IB_EVENT_PORT_ERR,
760 IB_EVENT_LID_CHANGE,
761 IB_EVENT_PKEY_CHANGE,
762 IB_EVENT_SM_CHANGE,
763 IB_EVENT_SRQ_ERR,
764 IB_EVENT_SRQ_LIMIT_REACHED,
765 IB_EVENT_QP_LAST_WQE_REACHED,
766 IB_EVENT_CLIENT_REREGISTER,
767 IB_EVENT_GID_CHANGE,
768 IB_EVENT_WQ_FATAL,
769 IB_EVENT_DEVICE_SPEED_CHANGE,
770 };
771
772 const char *__attribute_const__ ib_event_msg(enum ib_event_type event);
773
774 struct ib_event {
775 struct ib_device *device;
776 union {
777 struct ib_cq *cq;
778 struct ib_qp *qp;
779 struct ib_srq *srq;
780 struct ib_wq *wq;
781 u32 port_num;
782 } element;
783 enum ib_event_type event;
784 };
785
786 struct ib_event_handler {
787 struct ib_device *device;
788 void (*handler)(struct ib_event_handler *, struct ib_event *);
789 struct list_head list;
790 };
791
792 #define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler) \
793 do { \
794 (_ptr)->device = _device; \
795 (_ptr)->handler = _handler; \
796 INIT_LIST_HEAD(&(_ptr)->list); \
797 } while (0)
798
799 struct ib_global_route {
800 const struct ib_gid_attr *sgid_attr;
801 union ib_gid dgid;
802 u32 flow_label;
803 u8 sgid_index;
804 u8 hop_limit;
805 u8 traffic_class;
806 };
807
808 struct ib_grh {
809 __be32 version_tclass_flow;
810 __be16 paylen;
811 u8 next_hdr;
812 u8 hop_limit;
813 union ib_gid sgid;
814 union ib_gid dgid;
815 };
816
817 union rdma_network_hdr {
818 struct ib_grh ibgrh;
819 struct {
820 /* The IB spec states that if it's IPv4, the header
821 * is located in the last 20 bytes of the header.
822 */
823 u8 reserved[20];
824 struct iphdr roce4grh;
825 };
826 };
827
828 #define IB_QPN_MASK 0xFFFFFF
829
830 enum {
831 IB_MULTICAST_QPN = 0xffffff
832 };
833
834 #define IB_LID_PERMISSIVE cpu_to_be16(0xFFFF)
835 #define IB_MULTICAST_LID_BASE cpu_to_be16(0xC000)
836
837 enum ib_ah_flags {
838 IB_AH_GRH = 1
839 };
840
841 enum ib_rate {
842 IB_RATE_PORT_CURRENT = 0,
843 IB_RATE_2_5_GBPS = 2,
844 IB_RATE_5_GBPS = 5,
845 IB_RATE_10_GBPS = 3,
846 IB_RATE_20_GBPS = 6,
847 IB_RATE_30_GBPS = 4,
848 IB_RATE_40_GBPS = 7,
849 IB_RATE_60_GBPS = 8,
850 IB_RATE_80_GBPS = 9,
851 IB_RATE_120_GBPS = 10,
852 IB_RATE_14_GBPS = 11,
853 IB_RATE_56_GBPS = 12,
854 IB_RATE_112_GBPS = 13,
855 IB_RATE_168_GBPS = 14,
856 IB_RATE_25_GBPS = 15,
857 IB_RATE_100_GBPS = 16,
858 IB_RATE_200_GBPS = 17,
859 IB_RATE_300_GBPS = 18,
860 IB_RATE_28_GBPS = 19,
861 IB_RATE_50_GBPS = 20,
862 IB_RATE_400_GBPS = 21,
863 IB_RATE_600_GBPS = 22,
864 IB_RATE_800_GBPS = 23,
865 IB_RATE_1600_GBPS = 25,
866 };
867
868 /**
869 * ib_rate_to_mult - Convert the IB rate enum to a multiple of the
870 * base rate of 2.5 Gbit/sec. For example, IB_RATE_5_GBPS will be
871 * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec.
872 * @rate: rate to convert.
873 */
874 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate);
875
876 /**
877 * ib_rate_to_mbps - Convert the IB rate enum to Mbps.
878 * For example, IB_RATE_2_5_GBPS will be converted to 2500.
879 * @rate: rate to convert.
880 */
881 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);
882
883 struct ib_port_speed_info {
884 const char *str;
885 int rate; /* in deci-Gb/sec (100 MBps units) */
886 };
887
888 /**
889 * ib_port_attr_to_speed_info - Convert port attributes to speed information
890 * @attr: Port attributes containing active_speed and active_width
891 * @speed_info: Speed information to return
892 *
893 * Returns 0 on success, -EINVAL on error.
894 */
895 int ib_port_attr_to_speed_info(struct ib_port_attr *attr,
896 struct ib_port_speed_info *speed_info);
897
898 /**
899 * enum ib_mr_type - memory region type
900 * @IB_MR_TYPE_MEM_REG: memory region that is used for
901 * normal registration
902 * @IB_MR_TYPE_SG_GAPS: memory region that is capable to
903 * register any arbitrary sg lists (without
904 * the normal mr constraints - see
905 * ib_map_mr_sg)
906 * @IB_MR_TYPE_DM: memory region that is used for device
907 * memory registration
908 * @IB_MR_TYPE_USER: memory region that is used for the user-space
909 * application
910 * @IB_MR_TYPE_DMA: memory region that is used for DMA operations
911 * without address translations (VA=PA)
912 * @IB_MR_TYPE_INTEGRITY: memory region that is used for
913 * data integrity operations
914 */
915 enum ib_mr_type {
916 IB_MR_TYPE_MEM_REG,
917 IB_MR_TYPE_SG_GAPS,
918 IB_MR_TYPE_DM,
919 IB_MR_TYPE_USER,
920 IB_MR_TYPE_DMA,
921 IB_MR_TYPE_INTEGRITY,
922 };
923
924 enum ib_mr_status_check {
925 IB_MR_CHECK_SIG_STATUS = 1,
926 };
927
928 /**
929 * struct ib_mr_status - Memory region status container
930 *
931 * @fail_status: Bitmask of MR checks status. For each
932 * failed check a corresponding status bit is set.
933 * @sig_err: Additional info for IB_MR_CEHCK_SIG_STATUS
934 * failure.
935 */
936 struct ib_mr_status {
937 u32 fail_status;
938 struct ib_sig_err sig_err;
939 };
940
941 /**
942 * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
943 * enum.
944 * @mult: multiple to convert.
945 */
946 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult);
947
948 struct rdma_ah_init_attr {
949 struct rdma_ah_attr *ah_attr;
950 u32 flags;
951 struct net_device *xmit_slave;
952 };
953
954 enum rdma_ah_attr_type {
955 RDMA_AH_ATTR_TYPE_UNDEFINED,
956 RDMA_AH_ATTR_TYPE_IB,
957 RDMA_AH_ATTR_TYPE_ROCE,
958 RDMA_AH_ATTR_TYPE_OPA,
959 };
960
961 struct ib_ah_attr {
962 u16 dlid;
963 u8 src_path_bits;
964 };
965
966 struct roce_ah_attr {
967 u8 dmac[ETH_ALEN];
968 };
969
970 struct opa_ah_attr {
971 u32 dlid;
972 u8 src_path_bits;
973 bool make_grd;
974 };
975
976 struct rdma_ah_attr {
977 struct ib_global_route grh;
978 u8 sl;
979 u8 static_rate;
980 u32 port_num;
981 u8 ah_flags;
982 enum rdma_ah_attr_type type;
983 union {
984 struct ib_ah_attr ib;
985 struct roce_ah_attr roce;
986 struct opa_ah_attr opa;
987 };
988 };
989
990 enum ib_wc_status {
991 IB_WC_SUCCESS,
992 IB_WC_LOC_LEN_ERR,
993 IB_WC_LOC_QP_OP_ERR,
994 IB_WC_LOC_EEC_OP_ERR,
995 IB_WC_LOC_PROT_ERR,
996 IB_WC_WR_FLUSH_ERR,
997 IB_WC_MW_BIND_ERR,
998 IB_WC_BAD_RESP_ERR,
999 IB_WC_LOC_ACCESS_ERR,
1000 IB_WC_REM_INV_REQ_ERR,
1001 IB_WC_REM_ACCESS_ERR,
1002 IB_WC_REM_OP_ERR,
1003 IB_WC_RETRY_EXC_ERR,
1004 IB_WC_RNR_RETRY_EXC_ERR,
1005 IB_WC_LOC_RDD_VIOL_ERR,
1006 IB_WC_REM_INV_RD_REQ_ERR,
1007 IB_WC_REM_ABORT_ERR,
1008 IB_WC_INV_EECN_ERR,
1009 IB_WC_INV_EEC_STATE_ERR,
1010 IB_WC_FATAL_ERR,
1011 IB_WC_RESP_TIMEOUT_ERR,
1012 IB_WC_GENERAL_ERR
1013 };
1014
1015 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status);
1016
1017 enum ib_wc_opcode {
1018 IB_WC_SEND = IB_UVERBS_WC_SEND,
1019 IB_WC_RDMA_WRITE = IB_UVERBS_WC_RDMA_WRITE,
1020 IB_WC_RDMA_READ = IB_UVERBS_WC_RDMA_READ,
1021 IB_WC_COMP_SWAP = IB_UVERBS_WC_COMP_SWAP,
1022 IB_WC_FETCH_ADD = IB_UVERBS_WC_FETCH_ADD,
1023 IB_WC_BIND_MW = IB_UVERBS_WC_BIND_MW,
1024 IB_WC_LOCAL_INV = IB_UVERBS_WC_LOCAL_INV,
1025 IB_WC_LSO = IB_UVERBS_WC_TSO,
1026 IB_WC_ATOMIC_WRITE = IB_UVERBS_WC_ATOMIC_WRITE,
1027 IB_WC_REG_MR,
1028 IB_WC_MASKED_COMP_SWAP,
1029 IB_WC_MASKED_FETCH_ADD,
1030 IB_WC_FLUSH = IB_UVERBS_WC_FLUSH,
1031 /*
1032 * Set value of IB_WC_RECV so consumers can test if a completion is a
1033 * receive by testing (opcode & IB_WC_RECV).
1034 */
1035 IB_WC_RECV = 1 << 7,
1036 IB_WC_RECV_RDMA_WITH_IMM
1037 };
1038
1039 enum ib_wc_flags {
1040 IB_WC_GRH = 1,
1041 IB_WC_WITH_IMM = (1<<1),
1042 IB_WC_WITH_INVALIDATE = (1<<2),
1043 IB_WC_IP_CSUM_OK = (1<<3),
1044 IB_WC_WITH_SMAC = (1<<4),
1045 IB_WC_WITH_VLAN = (1<<5),
1046 IB_WC_WITH_NETWORK_HDR_TYPE = (1<<6),
1047 };
1048
1049 struct ib_wc {
1050 union {
1051 u64 wr_id;
1052 struct ib_cqe *wr_cqe;
1053 };
1054 enum ib_wc_status status;
1055 enum ib_wc_opcode opcode;
1056 u32 vendor_err;
1057 u32 byte_len;
1058 struct ib_qp *qp;
1059 union {
1060 __be32 imm_data;
1061 u32 invalidate_rkey;
1062 } ex;
1063 u32 src_qp;
1064 u32 slid;
1065 int wc_flags;
1066 u16 pkey_index;
1067 u8 sl;
1068 u8 dlid_path_bits;
1069 u32 port_num; /* valid only for DR SMPs on switches */
1070 u8 smac[ETH_ALEN];
1071 u16 vlan_id;
1072 u8 network_hdr_type;
1073 };
1074
1075 enum ib_cq_notify_flags {
1076 IB_CQ_SOLICITED = 1 << 0,
1077 IB_CQ_NEXT_COMP = 1 << 1,
1078 IB_CQ_SOLICITED_MASK = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP,
1079 IB_CQ_REPORT_MISSED_EVENTS = 1 << 2,
1080 };
1081
1082 enum ib_srq_type {
1083 IB_SRQT_BASIC = IB_UVERBS_SRQT_BASIC,
1084 IB_SRQT_XRC = IB_UVERBS_SRQT_XRC,
1085 IB_SRQT_TM = IB_UVERBS_SRQT_TM,
1086 };
1087
ib_srq_has_cq(enum ib_srq_type srq_type)1088 static inline bool ib_srq_has_cq(enum ib_srq_type srq_type)
1089 {
1090 return srq_type == IB_SRQT_XRC ||
1091 srq_type == IB_SRQT_TM;
1092 }
1093
1094 enum ib_srq_attr_mask {
1095 IB_SRQ_MAX_WR = 1 << 0,
1096 IB_SRQ_LIMIT = 1 << 1,
1097 };
1098
1099 struct ib_srq_attr {
1100 u32 max_wr;
1101 u32 max_sge;
1102 u32 srq_limit;
1103 };
1104
1105 struct ib_srq_init_attr {
1106 void (*event_handler)(struct ib_event *, void *);
1107 void *srq_context;
1108 struct ib_srq_attr attr;
1109 enum ib_srq_type srq_type;
1110
1111 struct {
1112 struct ib_cq *cq;
1113 union {
1114 struct {
1115 struct ib_xrcd *xrcd;
1116 } xrc;
1117
1118 struct {
1119 u32 max_num_tags;
1120 } tag_matching;
1121 };
1122 } ext;
1123 };
1124
1125 struct ib_qp_cap {
1126 u32 max_send_wr;
1127 u32 max_recv_wr;
1128 u32 max_send_sge;
1129 u32 max_recv_sge;
1130 u32 max_inline_data;
1131
1132 /*
1133 * Maximum number of rdma_rw_ctx structures in flight at a time.
1134 * ib_create_qp() will calculate the right amount of needed WRs
1135 * and MRs based on this.
1136 */
1137 u32 max_rdma_ctxs;
1138 };
1139
1140 enum ib_sig_type {
1141 IB_SIGNAL_ALL_WR,
1142 IB_SIGNAL_REQ_WR
1143 };
1144
1145 enum ib_qp_type {
1146 /*
1147 * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries
1148 * here (and in that order) since the MAD layer uses them as
1149 * indices into a 2-entry table.
1150 */
1151 IB_QPT_SMI,
1152 IB_QPT_GSI,
1153
1154 IB_QPT_RC = IB_UVERBS_QPT_RC,
1155 IB_QPT_UC = IB_UVERBS_QPT_UC,
1156 IB_QPT_UD = IB_UVERBS_QPT_UD,
1157 IB_QPT_RAW_IPV6,
1158 IB_QPT_RAW_ETHERTYPE,
1159 IB_QPT_RAW_PACKET = IB_UVERBS_QPT_RAW_PACKET,
1160 IB_QPT_XRC_INI = IB_UVERBS_QPT_XRC_INI,
1161 IB_QPT_XRC_TGT = IB_UVERBS_QPT_XRC_TGT,
1162 IB_QPT_MAX,
1163 IB_QPT_DRIVER = IB_UVERBS_QPT_DRIVER,
1164 /* Reserve a range for qp types internal to the low level driver.
1165 * These qp types will not be visible at the IB core layer, so the
1166 * IB_QPT_MAX usages should not be affected in the core layer
1167 */
1168 IB_QPT_RESERVED1 = 0x1000,
1169 IB_QPT_RESERVED2,
1170 IB_QPT_RESERVED3,
1171 IB_QPT_RESERVED4,
1172 IB_QPT_RESERVED5,
1173 IB_QPT_RESERVED6,
1174 IB_QPT_RESERVED7,
1175 IB_QPT_RESERVED8,
1176 IB_QPT_RESERVED9,
1177 IB_QPT_RESERVED10,
1178 };
1179
1180 enum ib_qp_create_flags {
1181 IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0,
1182 IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK =
1183 IB_UVERBS_QP_CREATE_BLOCK_MULTICAST_LOOPBACK,
1184 IB_QP_CREATE_CROSS_CHANNEL = 1 << 2,
1185 IB_QP_CREATE_MANAGED_SEND = 1 << 3,
1186 IB_QP_CREATE_MANAGED_RECV = 1 << 4,
1187 IB_QP_CREATE_NETIF_QP = 1 << 5,
1188 IB_QP_CREATE_INTEGRITY_EN = 1 << 6,
1189 IB_QP_CREATE_NETDEV_USE = 1 << 7,
1190 IB_QP_CREATE_SCATTER_FCS =
1191 IB_UVERBS_QP_CREATE_SCATTER_FCS,
1192 IB_QP_CREATE_CVLAN_STRIPPING =
1193 IB_UVERBS_QP_CREATE_CVLAN_STRIPPING,
1194 IB_QP_CREATE_SOURCE_QPN = 1 << 10,
1195 IB_QP_CREATE_PCI_WRITE_END_PADDING =
1196 IB_UVERBS_QP_CREATE_PCI_WRITE_END_PADDING,
1197 /* reserve bits 26-31 for low level drivers' internal use */
1198 IB_QP_CREATE_RESERVED_START = 1 << 26,
1199 IB_QP_CREATE_RESERVED_END = 1 << 31,
1200 };
1201
1202 /*
1203 * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler
1204 * callback to destroy the passed in QP.
1205 */
1206
1207 struct ib_qp_init_attr {
1208 /* This callback occurs in workqueue context */
1209 void (*event_handler)(struct ib_event *, void *);
1210
1211 void *qp_context;
1212 struct ib_cq *send_cq;
1213 struct ib_cq *recv_cq;
1214 struct ib_srq *srq;
1215 struct ib_xrcd *xrcd; /* XRC TGT QPs only */
1216 struct ib_qp_cap cap;
1217 enum ib_sig_type sq_sig_type;
1218 enum ib_qp_type qp_type;
1219 u32 create_flags;
1220
1221 /*
1222 * Only needed for special QP types, or when using the RW API.
1223 */
1224 u32 port_num;
1225 struct ib_rwq_ind_table *rwq_ind_tbl;
1226 u32 source_qpn;
1227 };
1228
1229 struct ib_qp_open_attr {
1230 void (*event_handler)(struct ib_event *, void *);
1231 void *qp_context;
1232 u32 qp_num;
1233 enum ib_qp_type qp_type;
1234 };
1235
1236 enum ib_rnr_timeout {
1237 IB_RNR_TIMER_655_36 = 0,
1238 IB_RNR_TIMER_000_01 = 1,
1239 IB_RNR_TIMER_000_02 = 2,
1240 IB_RNR_TIMER_000_03 = 3,
1241 IB_RNR_TIMER_000_04 = 4,
1242 IB_RNR_TIMER_000_06 = 5,
1243 IB_RNR_TIMER_000_08 = 6,
1244 IB_RNR_TIMER_000_12 = 7,
1245 IB_RNR_TIMER_000_16 = 8,
1246 IB_RNR_TIMER_000_24 = 9,
1247 IB_RNR_TIMER_000_32 = 10,
1248 IB_RNR_TIMER_000_48 = 11,
1249 IB_RNR_TIMER_000_64 = 12,
1250 IB_RNR_TIMER_000_96 = 13,
1251 IB_RNR_TIMER_001_28 = 14,
1252 IB_RNR_TIMER_001_92 = 15,
1253 IB_RNR_TIMER_002_56 = 16,
1254 IB_RNR_TIMER_003_84 = 17,
1255 IB_RNR_TIMER_005_12 = 18,
1256 IB_RNR_TIMER_007_68 = 19,
1257 IB_RNR_TIMER_010_24 = 20,
1258 IB_RNR_TIMER_015_36 = 21,
1259 IB_RNR_TIMER_020_48 = 22,
1260 IB_RNR_TIMER_030_72 = 23,
1261 IB_RNR_TIMER_040_96 = 24,
1262 IB_RNR_TIMER_061_44 = 25,
1263 IB_RNR_TIMER_081_92 = 26,
1264 IB_RNR_TIMER_122_88 = 27,
1265 IB_RNR_TIMER_163_84 = 28,
1266 IB_RNR_TIMER_245_76 = 29,
1267 IB_RNR_TIMER_327_68 = 30,
1268 IB_RNR_TIMER_491_52 = 31
1269 };
1270
1271 enum ib_qp_attr_mask {
1272 IB_QP_STATE = 1,
1273 IB_QP_CUR_STATE = (1<<1),
1274 IB_QP_EN_SQD_ASYNC_NOTIFY = (1<<2),
1275 IB_QP_ACCESS_FLAGS = (1<<3),
1276 IB_QP_PKEY_INDEX = (1<<4),
1277 IB_QP_PORT = (1<<5),
1278 IB_QP_QKEY = (1<<6),
1279 IB_QP_AV = (1<<7),
1280 IB_QP_PATH_MTU = (1<<8),
1281 IB_QP_TIMEOUT = (1<<9),
1282 IB_QP_RETRY_CNT = (1<<10),
1283 IB_QP_RNR_RETRY = (1<<11),
1284 IB_QP_RQ_PSN = (1<<12),
1285 IB_QP_MAX_QP_RD_ATOMIC = (1<<13),
1286 IB_QP_ALT_PATH = (1<<14),
1287 IB_QP_MIN_RNR_TIMER = (1<<15),
1288 IB_QP_SQ_PSN = (1<<16),
1289 IB_QP_MAX_DEST_RD_ATOMIC = (1<<17),
1290 IB_QP_PATH_MIG_STATE = (1<<18),
1291 IB_QP_CAP = (1<<19),
1292 IB_QP_DEST_QPN = (1<<20),
1293 IB_QP_RESERVED1 = (1<<21),
1294 IB_QP_RESERVED2 = (1<<22),
1295 IB_QP_RESERVED3 = (1<<23),
1296 IB_QP_RESERVED4 = (1<<24),
1297 IB_QP_RATE_LIMIT = (1<<25),
1298
1299 IB_QP_ATTR_STANDARD_BITS = GENMASK(20, 0),
1300 };
1301
1302 enum ib_qp_state {
1303 IB_QPS_RESET,
1304 IB_QPS_INIT,
1305 IB_QPS_RTR,
1306 IB_QPS_RTS,
1307 IB_QPS_SQD,
1308 IB_QPS_SQE,
1309 IB_QPS_ERR
1310 };
1311
1312 enum ib_mig_state {
1313 IB_MIG_MIGRATED,
1314 IB_MIG_REARM,
1315 IB_MIG_ARMED
1316 };
1317
1318 enum ib_mw_type {
1319 IB_MW_TYPE_1 = 1,
1320 IB_MW_TYPE_2 = 2
1321 };
1322
1323 struct ib_qp_attr {
1324 enum ib_qp_state qp_state;
1325 enum ib_qp_state cur_qp_state;
1326 enum ib_mtu path_mtu;
1327 enum ib_mig_state path_mig_state;
1328 u32 qkey;
1329 u32 rq_psn;
1330 u32 sq_psn;
1331 u32 dest_qp_num;
1332 int qp_access_flags;
1333 struct ib_qp_cap cap;
1334 struct rdma_ah_attr ah_attr;
1335 struct rdma_ah_attr alt_ah_attr;
1336 u16 pkey_index;
1337 u16 alt_pkey_index;
1338 u8 en_sqd_async_notify;
1339 u8 sq_draining;
1340 u8 max_rd_atomic;
1341 u8 max_dest_rd_atomic;
1342 u8 min_rnr_timer;
1343 u32 port_num;
1344 u8 timeout;
1345 u8 retry_cnt;
1346 u8 rnr_retry;
1347 u32 alt_port_num;
1348 u8 alt_timeout;
1349 u32 rate_limit;
1350 struct net_device *xmit_slave;
1351 };
1352
1353 enum ib_wr_opcode {
1354 /* These are shared with userspace */
1355 IB_WR_RDMA_WRITE = IB_UVERBS_WR_RDMA_WRITE,
1356 IB_WR_RDMA_WRITE_WITH_IMM = IB_UVERBS_WR_RDMA_WRITE_WITH_IMM,
1357 IB_WR_SEND = IB_UVERBS_WR_SEND,
1358 IB_WR_SEND_WITH_IMM = IB_UVERBS_WR_SEND_WITH_IMM,
1359 IB_WR_RDMA_READ = IB_UVERBS_WR_RDMA_READ,
1360 IB_WR_ATOMIC_CMP_AND_SWP = IB_UVERBS_WR_ATOMIC_CMP_AND_SWP,
1361 IB_WR_ATOMIC_FETCH_AND_ADD = IB_UVERBS_WR_ATOMIC_FETCH_AND_ADD,
1362 IB_WR_BIND_MW = IB_UVERBS_WR_BIND_MW,
1363 IB_WR_LSO = IB_UVERBS_WR_TSO,
1364 IB_WR_SEND_WITH_INV = IB_UVERBS_WR_SEND_WITH_INV,
1365 IB_WR_RDMA_READ_WITH_INV = IB_UVERBS_WR_RDMA_READ_WITH_INV,
1366 IB_WR_LOCAL_INV = IB_UVERBS_WR_LOCAL_INV,
1367 IB_WR_MASKED_ATOMIC_CMP_AND_SWP =
1368 IB_UVERBS_WR_MASKED_ATOMIC_CMP_AND_SWP,
1369 IB_WR_MASKED_ATOMIC_FETCH_AND_ADD =
1370 IB_UVERBS_WR_MASKED_ATOMIC_FETCH_AND_ADD,
1371 IB_WR_FLUSH = IB_UVERBS_WR_FLUSH,
1372 IB_WR_ATOMIC_WRITE = IB_UVERBS_WR_ATOMIC_WRITE,
1373
1374 /* These are kernel only and can not be issued by userspace */
1375 IB_WR_REG_MR = 0x20,
1376 IB_WR_REG_MR_INTEGRITY,
1377
1378 /* reserve values for low level drivers' internal use.
1379 * These values will not be used at all in the ib core layer.
1380 */
1381 IB_WR_RESERVED1 = 0xf0,
1382 IB_WR_RESERVED2,
1383 IB_WR_RESERVED3,
1384 IB_WR_RESERVED4,
1385 IB_WR_RESERVED5,
1386 IB_WR_RESERVED6,
1387 IB_WR_RESERVED7,
1388 IB_WR_RESERVED8,
1389 IB_WR_RESERVED9,
1390 IB_WR_RESERVED10,
1391 };
1392
1393 enum ib_send_flags {
1394 IB_SEND_FENCE = 1,
1395 IB_SEND_SIGNALED = (1<<1),
1396 IB_SEND_SOLICITED = (1<<2),
1397 IB_SEND_INLINE = (1<<3),
1398 IB_SEND_IP_CSUM = (1<<4),
1399
1400 /* reserve bits 26-31 for low level drivers' internal use */
1401 IB_SEND_RESERVED_START = (1 << 26),
1402 IB_SEND_RESERVED_END = (1 << 31),
1403 };
1404
1405 struct ib_sge {
1406 u64 addr;
1407 u32 length;
1408 u32 lkey;
1409 };
1410
1411 struct ib_cqe {
1412 void (*done)(struct ib_cq *cq, struct ib_wc *wc);
1413 };
1414
1415 struct ib_send_wr {
1416 struct ib_send_wr *next;
1417 union {
1418 u64 wr_id;
1419 struct ib_cqe *wr_cqe;
1420 };
1421 struct ib_sge *sg_list;
1422 int num_sge;
1423 enum ib_wr_opcode opcode;
1424 int send_flags;
1425 union {
1426 __be32 imm_data;
1427 u32 invalidate_rkey;
1428 } ex;
1429 };
1430
1431 struct ib_rdma_wr {
1432 struct ib_send_wr wr;
1433 u64 remote_addr;
1434 u32 rkey;
1435 };
1436
rdma_wr(const struct ib_send_wr * wr)1437 static inline const struct ib_rdma_wr *rdma_wr(const struct ib_send_wr *wr)
1438 {
1439 return container_of(wr, struct ib_rdma_wr, wr);
1440 }
1441
1442 struct ib_atomic_wr {
1443 struct ib_send_wr wr;
1444 u64 remote_addr;
1445 u64 compare_add;
1446 u64 swap;
1447 u64 compare_add_mask;
1448 u64 swap_mask;
1449 u32 rkey;
1450 };
1451
atomic_wr(const struct ib_send_wr * wr)1452 static inline const struct ib_atomic_wr *atomic_wr(const struct ib_send_wr *wr)
1453 {
1454 return container_of(wr, struct ib_atomic_wr, wr);
1455 }
1456
1457 struct ib_ud_wr {
1458 struct ib_send_wr wr;
1459 struct ib_ah *ah;
1460 void *header;
1461 int hlen;
1462 int mss;
1463 u32 remote_qpn;
1464 u32 remote_qkey;
1465 u16 pkey_index; /* valid for GSI only */
1466 u32 port_num; /* valid for DR SMPs on switch only */
1467 };
1468
ud_wr(const struct ib_send_wr * wr)1469 static inline const struct ib_ud_wr *ud_wr(const struct ib_send_wr *wr)
1470 {
1471 return container_of(wr, struct ib_ud_wr, wr);
1472 }
1473
1474 struct ib_reg_wr {
1475 struct ib_send_wr wr;
1476 struct ib_mr *mr;
1477 u32 key;
1478 int access;
1479 };
1480
reg_wr(const struct ib_send_wr * wr)1481 static inline const struct ib_reg_wr *reg_wr(const struct ib_send_wr *wr)
1482 {
1483 return container_of(wr, struct ib_reg_wr, wr);
1484 }
1485
1486 struct ib_recv_wr {
1487 struct ib_recv_wr *next;
1488 union {
1489 u64 wr_id;
1490 struct ib_cqe *wr_cqe;
1491 };
1492 struct ib_sge *sg_list;
1493 int num_sge;
1494 };
1495
1496 enum ib_access_flags {
1497 IB_ACCESS_LOCAL_WRITE = IB_UVERBS_ACCESS_LOCAL_WRITE,
1498 IB_ACCESS_REMOTE_WRITE = IB_UVERBS_ACCESS_REMOTE_WRITE,
1499 IB_ACCESS_REMOTE_READ = IB_UVERBS_ACCESS_REMOTE_READ,
1500 IB_ACCESS_REMOTE_ATOMIC = IB_UVERBS_ACCESS_REMOTE_ATOMIC,
1501 IB_ACCESS_MW_BIND = IB_UVERBS_ACCESS_MW_BIND,
1502 IB_ZERO_BASED = IB_UVERBS_ACCESS_ZERO_BASED,
1503 IB_ACCESS_ON_DEMAND = IB_UVERBS_ACCESS_ON_DEMAND,
1504 IB_ACCESS_HUGETLB = IB_UVERBS_ACCESS_HUGETLB,
1505 IB_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_RELAXED_ORDERING,
1506 IB_ACCESS_FLUSH_GLOBAL = IB_UVERBS_ACCESS_FLUSH_GLOBAL,
1507 IB_ACCESS_FLUSH_PERSISTENT = IB_UVERBS_ACCESS_FLUSH_PERSISTENT,
1508
1509 IB_ACCESS_OPTIONAL = IB_UVERBS_ACCESS_OPTIONAL_RANGE,
1510 IB_ACCESS_SUPPORTED =
1511 ((IB_ACCESS_FLUSH_PERSISTENT << 1) - 1) | IB_ACCESS_OPTIONAL,
1512 };
1513
1514 /*
1515 * XXX: these are apparently used for ->rereg_user_mr, no idea why they
1516 * are hidden here instead of a uapi header!
1517 */
1518 enum ib_mr_rereg_flags {
1519 IB_MR_REREG_TRANS = 1,
1520 IB_MR_REREG_PD = (1<<1),
1521 IB_MR_REREG_ACCESS = (1<<2),
1522 IB_MR_REREG_SUPPORTED = ((IB_MR_REREG_ACCESS << 1) - 1)
1523 };
1524
1525 struct ib_umem;
1526
1527 enum rdma_remove_reason {
1528 /*
1529 * Userspace requested uobject deletion or initial try
1530 * to remove uobject via cleanup. Call could fail
1531 */
1532 RDMA_REMOVE_DESTROY,
1533 /* Context deletion. This call should delete the actual object itself */
1534 RDMA_REMOVE_CLOSE,
1535 /* Driver is being hot-unplugged. This call should delete the actual object itself */
1536 RDMA_REMOVE_DRIVER_REMOVE,
1537 /* uobj is being cleaned-up before being committed */
1538 RDMA_REMOVE_ABORT,
1539 /* The driver failed to destroy the uobject and is being disconnected */
1540 RDMA_REMOVE_DRIVER_FAILURE,
1541 };
1542
1543 struct ib_rdmacg_object {
1544 #ifdef CONFIG_CGROUP_RDMA
1545 struct rdma_cgroup *cg; /* owner rdma cgroup */
1546 #endif
1547 };
1548
1549 struct ib_ucontext {
1550 struct ib_device *device;
1551 struct ib_uverbs_file *ufile;
1552
1553 struct ib_rdmacg_object cg_obj;
1554 u64 enabled_caps;
1555 /*
1556 * Implementation details of the RDMA core, don't use in drivers:
1557 */
1558 struct rdma_restrack_entry res;
1559 struct xarray mmap_xa;
1560 };
1561
1562 struct ib_uobject {
1563 u64 user_handle; /* handle given to us by userspace */
1564 /* ufile & ucontext owning this object */
1565 struct ib_uverbs_file *ufile;
1566 /* FIXME, save memory: ufile->context == context */
1567 struct ib_ucontext *context; /* associated user context */
1568 void *object; /* containing object */
1569 struct list_head list; /* link to context's list */
1570 struct ib_rdmacg_object cg_obj; /* rdmacg object */
1571 int id; /* index into kernel idr */
1572 struct kref ref;
1573 atomic_t usecnt; /* protects exclusive access */
1574 struct rcu_head rcu; /* kfree_rcu() overhead */
1575
1576 const struct uverbs_api_object *uapi_object;
1577 };
1578
1579 struct ib_udata {
1580 const void __user *inbuf;
1581 void __user *outbuf;
1582 size_t inlen;
1583 size_t outlen;
1584 };
1585
1586 struct ib_pd {
1587 u32 local_dma_lkey;
1588 u32 flags;
1589 struct ib_device *device;
1590 struct ib_uobject *uobject;
1591 atomic_t usecnt; /* count all resources */
1592
1593 u32 unsafe_global_rkey;
1594
1595 /*
1596 * Implementation details of the RDMA core, don't use in drivers:
1597 */
1598 struct ib_mr *__internal_mr;
1599 struct rdma_restrack_entry res;
1600 };
1601
1602 struct ib_xrcd {
1603 struct ib_device *device;
1604 atomic_t usecnt; /* count all exposed resources */
1605 struct inode *inode;
1606 struct rw_semaphore tgt_qps_rwsem;
1607 struct xarray tgt_qps;
1608 };
1609
1610 struct ib_ah {
1611 struct ib_device *device;
1612 struct ib_pd *pd;
1613 struct ib_uobject *uobject;
1614 const struct ib_gid_attr *sgid_attr;
1615 enum rdma_ah_attr_type type;
1616 };
1617
1618 typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context);
1619
1620 enum ib_poll_context {
1621 IB_POLL_SOFTIRQ, /* poll from softirq context */
1622 IB_POLL_WORKQUEUE, /* poll from workqueue */
1623 IB_POLL_UNBOUND_WORKQUEUE, /* poll from unbound workqueue */
1624 IB_POLL_LAST_POOL_TYPE = IB_POLL_UNBOUND_WORKQUEUE,
1625
1626 IB_POLL_DIRECT, /* caller context, no hw completions */
1627 };
1628
1629 struct ib_cq {
1630 struct ib_device *device;
1631 struct ib_ucq_object *uobject;
1632 ib_comp_handler comp_handler;
1633 void (*event_handler)(struct ib_event *, void *);
1634 void *cq_context;
1635 int cqe;
1636 unsigned int cqe_used;
1637 atomic_t usecnt; /* count number of work queues */
1638 enum ib_poll_context poll_ctx;
1639 struct ib_wc *wc;
1640 struct list_head pool_entry;
1641 union {
1642 struct irq_poll iop;
1643 struct work_struct work;
1644 };
1645 struct workqueue_struct *comp_wq;
1646 struct dim *dim;
1647
1648 /* updated only by trace points */
1649 ktime_t timestamp;
1650 u8 interrupt:1;
1651 u8 shared:1;
1652 unsigned int comp_vector;
1653
1654 /*
1655 * Implementation details of the RDMA core, don't use in drivers:
1656 */
1657 struct rdma_restrack_entry res;
1658 };
1659
1660 struct ib_srq {
1661 struct ib_device *device;
1662 struct ib_pd *pd;
1663 struct ib_usrq_object *uobject;
1664 void (*event_handler)(struct ib_event *, void *);
1665 void *srq_context;
1666 enum ib_srq_type srq_type;
1667 atomic_t usecnt;
1668
1669 struct {
1670 struct ib_cq *cq;
1671 union {
1672 struct {
1673 struct ib_xrcd *xrcd;
1674 u32 srq_num;
1675 } xrc;
1676 };
1677 } ext;
1678
1679 /*
1680 * Implementation details of the RDMA core, don't use in drivers:
1681 */
1682 struct rdma_restrack_entry res;
1683 };
1684
1685 enum ib_raw_packet_caps {
1686 /*
1687 * Strip cvlan from incoming packet and report it in the matching work
1688 * completion is supported.
1689 */
1690 IB_RAW_PACKET_CAP_CVLAN_STRIPPING =
1691 IB_UVERBS_RAW_PACKET_CAP_CVLAN_STRIPPING,
1692 /*
1693 * Scatter FCS field of an incoming packet to host memory is supported.
1694 */
1695 IB_RAW_PACKET_CAP_SCATTER_FCS = IB_UVERBS_RAW_PACKET_CAP_SCATTER_FCS,
1696 /* Checksum offloads are supported (for both send and receive). */
1697 IB_RAW_PACKET_CAP_IP_CSUM = IB_UVERBS_RAW_PACKET_CAP_IP_CSUM,
1698 /*
1699 * When a packet is received for an RQ with no receive WQEs, the
1700 * packet processing is delayed.
1701 */
1702 IB_RAW_PACKET_CAP_DELAY_DROP = IB_UVERBS_RAW_PACKET_CAP_DELAY_DROP,
1703 };
1704
1705 enum ib_wq_type {
1706 IB_WQT_RQ = IB_UVERBS_WQT_RQ,
1707 };
1708
1709 enum ib_wq_state {
1710 IB_WQS_RESET,
1711 IB_WQS_RDY,
1712 IB_WQS_ERR
1713 };
1714
1715 struct ib_wq {
1716 struct ib_device *device;
1717 struct ib_uwq_object *uobject;
1718 void *wq_context;
1719 void (*event_handler)(struct ib_event *, void *);
1720 struct ib_pd *pd;
1721 struct ib_cq *cq;
1722 u32 wq_num;
1723 enum ib_wq_state state;
1724 enum ib_wq_type wq_type;
1725 atomic_t usecnt;
1726 };
1727
1728 enum ib_wq_flags {
1729 IB_WQ_FLAGS_CVLAN_STRIPPING = IB_UVERBS_WQ_FLAGS_CVLAN_STRIPPING,
1730 IB_WQ_FLAGS_SCATTER_FCS = IB_UVERBS_WQ_FLAGS_SCATTER_FCS,
1731 IB_WQ_FLAGS_DELAY_DROP = IB_UVERBS_WQ_FLAGS_DELAY_DROP,
1732 IB_WQ_FLAGS_PCI_WRITE_END_PADDING =
1733 IB_UVERBS_WQ_FLAGS_PCI_WRITE_END_PADDING,
1734 };
1735
1736 struct ib_wq_init_attr {
1737 void *wq_context;
1738 enum ib_wq_type wq_type;
1739 u32 max_wr;
1740 u32 max_sge;
1741 struct ib_cq *cq;
1742 void (*event_handler)(struct ib_event *, void *);
1743 u32 create_flags; /* Use enum ib_wq_flags */
1744 };
1745
1746 enum ib_wq_attr_mask {
1747 IB_WQ_STATE = 1 << 0,
1748 IB_WQ_CUR_STATE = 1 << 1,
1749 IB_WQ_FLAGS = 1 << 2,
1750 };
1751
1752 struct ib_wq_attr {
1753 enum ib_wq_state wq_state;
1754 enum ib_wq_state curr_wq_state;
1755 u32 flags; /* Use enum ib_wq_flags */
1756 u32 flags_mask; /* Use enum ib_wq_flags */
1757 };
1758
1759 struct ib_rwq_ind_table {
1760 struct ib_device *device;
1761 struct ib_uobject *uobject;
1762 atomic_t usecnt;
1763 u32 ind_tbl_num;
1764 u32 log_ind_tbl_size;
1765 struct ib_wq **ind_tbl;
1766 };
1767
1768 struct ib_rwq_ind_table_init_attr {
1769 u32 log_ind_tbl_size;
1770 /* Each entry is a pointer to Receive Work Queue */
1771 struct ib_wq **ind_tbl;
1772 };
1773
1774 enum port_pkey_state {
1775 IB_PORT_PKEY_NOT_VALID = 0,
1776 IB_PORT_PKEY_VALID = 1,
1777 IB_PORT_PKEY_LISTED = 2,
1778 };
1779
1780 struct ib_qp_security;
1781
1782 struct ib_port_pkey {
1783 enum port_pkey_state state;
1784 u16 pkey_index;
1785 u32 port_num;
1786 struct list_head qp_list;
1787 struct list_head to_error_list;
1788 struct ib_qp_security *sec;
1789 };
1790
1791 struct ib_ports_pkeys {
1792 struct ib_port_pkey main;
1793 struct ib_port_pkey alt;
1794 };
1795
1796 struct ib_qp_security {
1797 struct ib_qp *qp;
1798 struct ib_device *dev;
1799 /* Hold this mutex when changing port and pkey settings. */
1800 struct mutex mutex;
1801 struct ib_ports_pkeys *ports_pkeys;
1802 /* A list of all open shared QP handles. Required to enforce security
1803 * properly for all users of a shared QP.
1804 */
1805 struct list_head shared_qp_list;
1806 void *security;
1807 bool destroying;
1808 atomic_t error_list_count;
1809 struct completion error_complete;
1810 int error_comps_pending;
1811 };
1812
1813 /*
1814 * @max_write_sge: Maximum SGE elements per RDMA WRITE request.
1815 * @max_read_sge: Maximum SGE elements per RDMA READ request.
1816 */
1817 struct ib_qp {
1818 struct ib_device *device;
1819 struct ib_pd *pd;
1820 struct ib_cq *send_cq;
1821 struct ib_cq *recv_cq;
1822 spinlock_t mr_lock;
1823 int mrs_used;
1824 struct list_head rdma_mrs;
1825 struct list_head sig_mrs;
1826 struct ib_srq *srq;
1827 struct completion srq_completion;
1828 struct ib_xrcd *xrcd; /* XRC TGT QPs only */
1829 struct list_head xrcd_list;
1830
1831 /* count times opened, mcast attaches, flow attaches */
1832 atomic_t usecnt;
1833 struct list_head open_list;
1834 struct ib_qp *real_qp;
1835 struct ib_uqp_object *uobject;
1836 void (*event_handler)(struct ib_event *, void *);
1837 void (*registered_event_handler)(struct ib_event *, void *);
1838 void *qp_context;
1839 /* sgid_attrs associated with the AV's */
1840 const struct ib_gid_attr *av_sgid_attr;
1841 const struct ib_gid_attr *alt_path_sgid_attr;
1842 u32 qp_num;
1843 u32 max_write_sge;
1844 u32 max_read_sge;
1845 enum ib_qp_type qp_type;
1846 struct ib_rwq_ind_table *rwq_ind_tbl;
1847 struct ib_qp_security *qp_sec;
1848 u32 port;
1849
1850 bool integrity_en;
1851 /*
1852 * Implementation details of the RDMA core, don't use in drivers:
1853 */
1854 struct rdma_restrack_entry res;
1855
1856 /* The counter the qp is bind to */
1857 struct rdma_counter *counter;
1858 };
1859
1860 struct ib_dm {
1861 struct ib_device *device;
1862 u32 length;
1863 u32 flags;
1864 struct ib_uobject *uobject;
1865 atomic_t usecnt;
1866 };
1867
1868 /* bit values to mark existence of ib_dmah fields */
1869 enum {
1870 IB_DMAH_CPU_ID_EXISTS,
1871 IB_DMAH_MEM_TYPE_EXISTS,
1872 IB_DMAH_PH_EXISTS,
1873 };
1874
1875 struct ib_dmah {
1876 struct ib_device *device;
1877 struct ib_uobject *uobject;
1878 /*
1879 * Implementation details of the RDMA core, don't use in drivers:
1880 */
1881 struct rdma_restrack_entry res;
1882 u32 cpu_id;
1883 enum tph_mem_type mem_type;
1884 atomic_t usecnt;
1885 u8 ph;
1886 u8 valid_fields; /* use IB_DMAH_XXX_EXISTS */
1887 };
1888
1889 struct ib_mr {
1890 struct ib_device *device;
1891 struct ib_pd *pd;
1892 u32 lkey;
1893 u32 rkey;
1894 u64 iova;
1895 u64 length;
1896 unsigned int page_size;
1897 enum ib_mr_type type;
1898 bool need_inval;
1899 union {
1900 struct ib_uobject *uobject; /* user */
1901 struct list_head qp_entry; /* FR */
1902 };
1903
1904 struct ib_dm *dm;
1905 struct ib_sig_attrs *sig_attrs; /* only for IB_MR_TYPE_INTEGRITY MRs */
1906 struct ib_dmah *dmah;
1907 /*
1908 * Implementation details of the RDMA core, don't use in drivers:
1909 */
1910 struct rdma_restrack_entry res;
1911 };
1912
1913 struct ib_mw {
1914 struct ib_device *device;
1915 struct ib_pd *pd;
1916 struct ib_uobject *uobject;
1917 u32 rkey;
1918 enum ib_mw_type type;
1919 };
1920
1921 /* Supported steering options */
1922 enum ib_flow_attr_type {
1923 /* steering according to rule specifications */
1924 IB_FLOW_ATTR_NORMAL = 0x0,
1925 /* default unicast and multicast rule -
1926 * receive all Eth traffic which isn't steered to any QP
1927 */
1928 IB_FLOW_ATTR_ALL_DEFAULT = 0x1,
1929 /* default multicast rule -
1930 * receive all Eth multicast traffic which isn't steered to any QP
1931 */
1932 IB_FLOW_ATTR_MC_DEFAULT = 0x2,
1933 /* sniffer rule - receive all port traffic */
1934 IB_FLOW_ATTR_SNIFFER = 0x3
1935 };
1936
1937 /* Supported steering header types */
1938 enum ib_flow_spec_type {
1939 /* L2 headers*/
1940 IB_FLOW_SPEC_ETH = 0x20,
1941 IB_FLOW_SPEC_IB = 0x22,
1942 /* L3 header*/
1943 IB_FLOW_SPEC_IPV4 = 0x30,
1944 IB_FLOW_SPEC_IPV6 = 0x31,
1945 IB_FLOW_SPEC_ESP = 0x34,
1946 /* L4 headers*/
1947 IB_FLOW_SPEC_TCP = 0x40,
1948 IB_FLOW_SPEC_UDP = 0x41,
1949 IB_FLOW_SPEC_VXLAN_TUNNEL = 0x50,
1950 IB_FLOW_SPEC_GRE = 0x51,
1951 IB_FLOW_SPEC_MPLS = 0x60,
1952 IB_FLOW_SPEC_INNER = 0x100,
1953 /* Actions */
1954 IB_FLOW_SPEC_ACTION_TAG = 0x1000,
1955 IB_FLOW_SPEC_ACTION_DROP = 0x1001,
1956 IB_FLOW_SPEC_ACTION_HANDLE = 0x1002,
1957 IB_FLOW_SPEC_ACTION_COUNT = 0x1003,
1958 };
1959 #define IB_FLOW_SPEC_LAYER_MASK 0xF0
1960 #define IB_FLOW_SPEC_SUPPORT_LAYERS 10
1961
1962 enum ib_flow_flags {
1963 IB_FLOW_ATTR_FLAGS_DONT_TRAP = 1UL << 1, /* Continue match, no steal */
1964 IB_FLOW_ATTR_FLAGS_EGRESS = 1UL << 2, /* Egress flow */
1965 IB_FLOW_ATTR_FLAGS_RESERVED = 1UL << 3 /* Must be last */
1966 };
1967
1968 struct ib_flow_eth_filter {
1969 u8 dst_mac[6];
1970 u8 src_mac[6];
1971 __be16 ether_type;
1972 __be16 vlan_tag;
1973 };
1974
1975 struct ib_flow_spec_eth {
1976 u32 type;
1977 u16 size;
1978 struct ib_flow_eth_filter val;
1979 struct ib_flow_eth_filter mask;
1980 };
1981
1982 struct ib_flow_ib_filter {
1983 __be16 dlid;
1984 __u8 sl;
1985 };
1986
1987 struct ib_flow_spec_ib {
1988 u32 type;
1989 u16 size;
1990 struct ib_flow_ib_filter val;
1991 struct ib_flow_ib_filter mask;
1992 };
1993
1994 /* IPv4 header flags */
1995 enum ib_ipv4_flags {
1996 IB_IPV4_DONT_FRAG = 0x2, /* Don't enable packet fragmentation */
1997 IB_IPV4_MORE_FRAG = 0X4 /* For All fragmented packets except the
1998 last have this flag set */
1999 };
2000
2001 struct ib_flow_ipv4_filter {
2002 __be32 src_ip;
2003 __be32 dst_ip;
2004 u8 proto;
2005 u8 tos;
2006 u8 ttl;
2007 u8 flags;
2008 };
2009
2010 struct ib_flow_spec_ipv4 {
2011 u32 type;
2012 u16 size;
2013 struct ib_flow_ipv4_filter val;
2014 struct ib_flow_ipv4_filter mask;
2015 };
2016
2017 struct ib_flow_ipv6_filter {
2018 u8 src_ip[16];
2019 u8 dst_ip[16];
2020 __be32 flow_label;
2021 u8 next_hdr;
2022 u8 traffic_class;
2023 u8 hop_limit;
2024 } __packed;
2025
2026 struct ib_flow_spec_ipv6 {
2027 u32 type;
2028 u16 size;
2029 struct ib_flow_ipv6_filter val;
2030 struct ib_flow_ipv6_filter mask;
2031 };
2032
2033 struct ib_flow_tcp_udp_filter {
2034 __be16 dst_port;
2035 __be16 src_port;
2036 };
2037
2038 struct ib_flow_spec_tcp_udp {
2039 u32 type;
2040 u16 size;
2041 struct ib_flow_tcp_udp_filter val;
2042 struct ib_flow_tcp_udp_filter mask;
2043 };
2044
2045 struct ib_flow_tunnel_filter {
2046 __be32 tunnel_id;
2047 };
2048
2049 /* ib_flow_spec_tunnel describes the Vxlan tunnel
2050 * the tunnel_id from val has the vni value
2051 */
2052 struct ib_flow_spec_tunnel {
2053 u32 type;
2054 u16 size;
2055 struct ib_flow_tunnel_filter val;
2056 struct ib_flow_tunnel_filter mask;
2057 };
2058
2059 struct ib_flow_esp_filter {
2060 __be32 spi;
2061 __be32 seq;
2062 };
2063
2064 struct ib_flow_spec_esp {
2065 u32 type;
2066 u16 size;
2067 struct ib_flow_esp_filter val;
2068 struct ib_flow_esp_filter mask;
2069 };
2070
2071 struct ib_flow_gre_filter {
2072 __be16 c_ks_res0_ver;
2073 __be16 protocol;
2074 __be32 key;
2075 };
2076
2077 struct ib_flow_spec_gre {
2078 u32 type;
2079 u16 size;
2080 struct ib_flow_gre_filter val;
2081 struct ib_flow_gre_filter mask;
2082 };
2083
2084 struct ib_flow_mpls_filter {
2085 __be32 tag;
2086 };
2087
2088 struct ib_flow_spec_mpls {
2089 u32 type;
2090 u16 size;
2091 struct ib_flow_mpls_filter val;
2092 struct ib_flow_mpls_filter mask;
2093 };
2094
2095 struct ib_flow_spec_action_tag {
2096 enum ib_flow_spec_type type;
2097 u16 size;
2098 u32 tag_id;
2099 };
2100
2101 struct ib_flow_spec_action_drop {
2102 enum ib_flow_spec_type type;
2103 u16 size;
2104 };
2105
2106 struct ib_flow_spec_action_handle {
2107 enum ib_flow_spec_type type;
2108 u16 size;
2109 struct ib_flow_action *act;
2110 };
2111
2112 enum ib_counters_description {
2113 IB_COUNTER_PACKETS,
2114 IB_COUNTER_BYTES,
2115 };
2116
2117 struct ib_flow_spec_action_count {
2118 enum ib_flow_spec_type type;
2119 u16 size;
2120 struct ib_counters *counters;
2121 };
2122
2123 union ib_flow_spec {
2124 struct {
2125 u32 type;
2126 u16 size;
2127 };
2128 struct ib_flow_spec_eth eth;
2129 struct ib_flow_spec_ib ib;
2130 struct ib_flow_spec_ipv4 ipv4;
2131 struct ib_flow_spec_tcp_udp tcp_udp;
2132 struct ib_flow_spec_ipv6 ipv6;
2133 struct ib_flow_spec_tunnel tunnel;
2134 struct ib_flow_spec_esp esp;
2135 struct ib_flow_spec_gre gre;
2136 struct ib_flow_spec_mpls mpls;
2137 struct ib_flow_spec_action_tag flow_tag;
2138 struct ib_flow_spec_action_drop drop;
2139 struct ib_flow_spec_action_handle action;
2140 struct ib_flow_spec_action_count flow_count;
2141 };
2142
2143 struct ib_flow_attr {
2144 enum ib_flow_attr_type type;
2145 u16 size;
2146 u16 priority;
2147 u32 flags;
2148 u8 num_of_specs;
2149 u32 port;
2150 union ib_flow_spec flows[];
2151 };
2152
2153 struct ib_flow {
2154 struct ib_qp *qp;
2155 struct ib_device *device;
2156 struct ib_uobject *uobject;
2157 };
2158
2159 enum ib_flow_action_type {
2160 IB_FLOW_ACTION_UNSPECIFIED,
2161 IB_FLOW_ACTION_ESP = 1,
2162 };
2163
2164 struct ib_flow_action_attrs_esp_keymats {
2165 enum ib_uverbs_flow_action_esp_keymat protocol;
2166 union {
2167 struct ib_uverbs_flow_action_esp_keymat_aes_gcm aes_gcm;
2168 } keymat;
2169 };
2170
2171 struct ib_flow_action_attrs_esp_replays {
2172 enum ib_uverbs_flow_action_esp_replay protocol;
2173 union {
2174 struct ib_uverbs_flow_action_esp_replay_bmp bmp;
2175 } replay;
2176 };
2177
2178 enum ib_flow_action_attrs_esp_flags {
2179 /* All user-space flags at the top: Use enum ib_uverbs_flow_action_esp_flags
2180 * This is done in order to share the same flags between user-space and
2181 * kernel and spare an unnecessary translation.
2182 */
2183
2184 /* Kernel flags */
2185 IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED = 1ULL << 32,
2186 IB_FLOW_ACTION_ESP_FLAGS_MOD_ESP_ATTRS = 1ULL << 33,
2187 };
2188
2189 struct ib_flow_spec_list {
2190 struct ib_flow_spec_list *next;
2191 union ib_flow_spec spec;
2192 };
2193
2194 struct ib_flow_action_attrs_esp {
2195 struct ib_flow_action_attrs_esp_keymats *keymat;
2196 struct ib_flow_action_attrs_esp_replays *replay;
2197 struct ib_flow_spec_list *encap;
2198 /* Used only if IB_FLOW_ACTION_ESP_FLAGS_ESN_TRIGGERED is enabled.
2199 * Value of 0 is a valid value.
2200 */
2201 u32 esn;
2202 u32 spi;
2203 u32 seq;
2204 u32 tfc_pad;
2205 /* Use enum ib_flow_action_attrs_esp_flags */
2206 u64 flags;
2207 u64 hard_limit_pkts;
2208 };
2209
2210 struct ib_flow_action {
2211 struct ib_device *device;
2212 struct ib_uobject *uobject;
2213 enum ib_flow_action_type type;
2214 atomic_t usecnt;
2215 };
2216
2217 struct ib_mad;
2218
2219 enum ib_process_mad_flags {
2220 IB_MAD_IGNORE_MKEY = 1,
2221 IB_MAD_IGNORE_BKEY = 2,
2222 IB_MAD_IGNORE_ALL = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY
2223 };
2224
2225 enum ib_mad_result {
2226 IB_MAD_RESULT_FAILURE = 0, /* (!SUCCESS is the important flag) */
2227 IB_MAD_RESULT_SUCCESS = 1 << 0, /* MAD was successfully processed */
2228 IB_MAD_RESULT_REPLY = 1 << 1, /* Reply packet needs to be sent */
2229 IB_MAD_RESULT_CONSUMED = 1 << 2 /* Packet consumed: stop processing */
2230 };
2231
2232 struct ib_port_cache {
2233 u64 subnet_prefix;
2234 struct ib_pkey_cache *pkey;
2235 struct ib_gid_table *gid;
2236 u8 lmc;
2237 enum ib_port_state port_state;
2238 enum ib_port_state last_port_state;
2239 };
2240
2241 struct ib_port_immutable {
2242 int pkey_tbl_len;
2243 int gid_tbl_len;
2244 u32 core_cap_flags;
2245 u32 max_mad_size;
2246 };
2247
2248 struct ib_port_data {
2249 struct ib_device *ib_dev;
2250
2251 struct ib_port_immutable immutable;
2252
2253 spinlock_t pkey_list_lock;
2254
2255 spinlock_t netdev_lock;
2256
2257 struct list_head pkey_list;
2258
2259 struct ib_port_cache cache;
2260
2261 struct net_device __rcu *netdev;
2262 netdevice_tracker netdev_tracker;
2263 struct hlist_node ndev_hash_link;
2264 struct rdma_port_counter port_counter;
2265 struct ib_port *sysfs;
2266 };
2267
2268 /* rdma netdev type - specifies protocol type */
2269 enum rdma_netdev_t {
2270 RDMA_NETDEV_OPA_VNIC,
2271 RDMA_NETDEV_IPOIB,
2272 };
2273
2274 /**
2275 * struct rdma_netdev - rdma netdev
2276 * For cases where netstack interfacing is required.
2277 */
2278 struct rdma_netdev {
2279 void *clnt_priv;
2280 struct ib_device *hca;
2281 u32 port_num;
2282 int mtu;
2283
2284 /*
2285 * cleanup function must be specified.
2286 * FIXME: This is only used for OPA_VNIC and that usage should be
2287 * removed too.
2288 */
2289 void (*free_rdma_netdev)(struct net_device *netdev);
2290
2291 /* control functions */
2292 void (*set_id)(struct net_device *netdev, int id);
2293 /* send packet */
2294 int (*send)(struct net_device *dev, struct sk_buff *skb,
2295 struct ib_ah *address, u32 dqpn);
2296 /* multicast */
2297 int (*attach_mcast)(struct net_device *dev, struct ib_device *hca,
2298 union ib_gid *gid, u16 mlid,
2299 int set_qkey, u32 qkey);
2300 int (*detach_mcast)(struct net_device *dev, struct ib_device *hca,
2301 union ib_gid *gid, u16 mlid);
2302 /* timeout */
2303 void (*tx_timeout)(struct net_device *dev, unsigned int txqueue);
2304 };
2305
2306 struct rdma_netdev_alloc_params {
2307 size_t sizeof_priv;
2308 unsigned int txqs;
2309 unsigned int rxqs;
2310 void *param;
2311
2312 int (*initialize_rdma_netdev)(struct ib_device *device, u32 port_num,
2313 struct net_device *netdev, void *param);
2314 };
2315
2316 struct ib_odp_counters {
2317 atomic64_t faults;
2318 atomic64_t faults_handled;
2319 atomic64_t invalidations;
2320 atomic64_t invalidations_handled;
2321 atomic64_t prefetch;
2322 };
2323
2324 struct ib_counters {
2325 struct ib_device *device;
2326 struct ib_uobject *uobject;
2327 /* num of objects attached */
2328 atomic_t usecnt;
2329 };
2330
2331 struct ib_counters_read_attr {
2332 u64 *counters_buff;
2333 u32 ncounters;
2334 u32 flags; /* use enum ib_read_counters_flags */
2335 };
2336
2337 struct uverbs_attr_bundle;
2338 struct iw_cm_id;
2339 struct iw_cm_conn_param;
2340
2341 #define INIT_RDMA_OBJ_SIZE(ib_struct, drv_struct, member) \
2342 .size_##ib_struct = \
2343 (sizeof(struct drv_struct) + \
2344 BUILD_BUG_ON_ZERO(offsetof(struct drv_struct, member)) + \
2345 BUILD_BUG_ON_ZERO( \
2346 !__same_type(((struct drv_struct *)NULL)->member, \
2347 struct ib_struct)))
2348
2349 #define rdma_zalloc_drv_obj_gfp(ib_dev, ib_type, gfp) \
2350 ((struct ib_type *)rdma_zalloc_obj(ib_dev, ib_dev->ops.size_##ib_type, \
2351 gfp, false))
2352
2353 #define rdma_zalloc_drv_obj_numa(ib_dev, ib_type) \
2354 ((struct ib_type *)rdma_zalloc_obj(ib_dev, ib_dev->ops.size_##ib_type, \
2355 GFP_KERNEL, true))
2356
2357 #define rdma_zalloc_drv_obj(ib_dev, ib_type) \
2358 rdma_zalloc_drv_obj_gfp(ib_dev, ib_type, GFP_KERNEL)
2359
2360 #define DECLARE_RDMA_OBJ_SIZE(ib_struct) size_t size_##ib_struct
2361
2362 struct rdma_user_mmap_entry {
2363 struct kref ref;
2364 struct ib_ucontext *ucontext;
2365 unsigned long start_pgoff;
2366 size_t npages;
2367 bool driver_removed;
2368 /* protects access to dmabufs */
2369 struct mutex dmabufs_lock;
2370 struct list_head dmabufs;
2371 };
2372
2373 /* Return the offset (in bytes) the user should pass to libc's mmap() */
2374 static inline u64
rdma_user_mmap_get_offset(const struct rdma_user_mmap_entry * entry)2375 rdma_user_mmap_get_offset(const struct rdma_user_mmap_entry *entry)
2376 {
2377 return (u64)entry->start_pgoff << PAGE_SHIFT;
2378 }
2379
2380 /**
2381 * struct ib_device_ops - InfiniBand device operations
2382 * This structure defines all the InfiniBand device operations, providers will
2383 * need to define the supported operations, otherwise they will be set to null.
2384 */
2385 struct ib_device_ops {
2386 struct module *owner;
2387 enum rdma_driver_id driver_id;
2388 u32 uverbs_abi_ver;
2389 unsigned int uverbs_no_driver_id_binding:1;
2390
2391 /*
2392 * NOTE: New drivers should not make use of device_group; instead new
2393 * device parameter should be exposed via netlink command. This
2394 * mechanism exists only for existing drivers.
2395 */
2396 const struct attribute_group *device_group;
2397 const struct attribute_group **port_groups;
2398
2399 int (*post_send)(struct ib_qp *qp, const struct ib_send_wr *send_wr,
2400 const struct ib_send_wr **bad_send_wr);
2401 int (*post_recv)(struct ib_qp *qp, const struct ib_recv_wr *recv_wr,
2402 const struct ib_recv_wr **bad_recv_wr);
2403 void (*drain_rq)(struct ib_qp *qp);
2404 void (*drain_sq)(struct ib_qp *qp);
2405 int (*poll_cq)(struct ib_cq *cq, int num_entries, struct ib_wc *wc);
2406 int (*peek_cq)(struct ib_cq *cq, int wc_cnt);
2407 int (*req_notify_cq)(struct ib_cq *cq, enum ib_cq_notify_flags flags);
2408 int (*post_srq_recv)(struct ib_srq *srq,
2409 const struct ib_recv_wr *recv_wr,
2410 const struct ib_recv_wr **bad_recv_wr);
2411 int (*process_mad)(struct ib_device *device, int process_mad_flags,
2412 u32 port_num, const struct ib_wc *in_wc,
2413 const struct ib_grh *in_grh,
2414 const struct ib_mad *in_mad, struct ib_mad *out_mad,
2415 size_t *out_mad_size, u16 *out_mad_pkey_index);
2416 int (*query_device)(struct ib_device *device,
2417 struct ib_device_attr *device_attr,
2418 struct ib_udata *udata);
2419 int (*modify_device)(struct ib_device *device, int device_modify_mask,
2420 struct ib_device_modify *device_modify);
2421 void (*get_dev_fw_str)(struct ib_device *device, char *str);
2422 const struct cpumask *(*get_vector_affinity)(struct ib_device *ibdev,
2423 int comp_vector);
2424 int (*query_port)(struct ib_device *device, u32 port_num,
2425 struct ib_port_attr *port_attr);
2426 int (*query_port_speed)(struct ib_device *device, u32 port_num,
2427 u64 *speed);
2428 int (*modify_port)(struct ib_device *device, u32 port_num,
2429 int port_modify_mask,
2430 struct ib_port_modify *port_modify);
2431 /*
2432 * The following mandatory functions are used only at device
2433 * registration. Keep functions such as these at the end of this
2434 * structure to avoid cache line misses when accessing struct ib_device
2435 * in fast paths.
2436 */
2437 int (*get_port_immutable)(struct ib_device *device, u32 port_num,
2438 struct ib_port_immutable *immutable);
2439 enum rdma_link_layer (*get_link_layer)(struct ib_device *device,
2440 u32 port_num);
2441 /*
2442 * When calling get_netdev, the HW vendor's driver should return the
2443 * net device of device @device at port @port_num or NULL if such
2444 * a net device doesn't exist. The vendor driver should call dev_hold
2445 * on this net device. The HW vendor's device driver must guarantee
2446 * that this function returns NULL before the net device has finished
2447 * NETDEV_UNREGISTER state.
2448 */
2449 struct net_device *(*get_netdev)(struct ib_device *device,
2450 u32 port_num);
2451 /*
2452 * rdma netdev operation
2453 *
2454 * Driver implementing alloc_rdma_netdev or rdma_netdev_get_params
2455 * must return -EOPNOTSUPP if it doesn't support the specified type.
2456 */
2457 struct net_device *(*alloc_rdma_netdev)(
2458 struct ib_device *device, u32 port_num, enum rdma_netdev_t type,
2459 const char *name, unsigned char name_assign_type,
2460 void (*setup)(struct net_device *));
2461
2462 int (*rdma_netdev_get_params)(struct ib_device *device, u32 port_num,
2463 enum rdma_netdev_t type,
2464 struct rdma_netdev_alloc_params *params);
2465 /*
2466 * query_gid should be return GID value for @device, when @port_num
2467 * link layer is either IB or iWarp. It is no-op if @port_num port
2468 * is RoCE link layer.
2469 */
2470 int (*query_gid)(struct ib_device *device, u32 port_num, int index,
2471 union ib_gid *gid);
2472 /*
2473 * When calling add_gid, the HW vendor's driver should add the gid
2474 * of device of port at gid index available at @attr. Meta-info of
2475 * that gid (for example, the network device related to this gid) is
2476 * available at @attr. @context allows the HW vendor driver to store
2477 * extra information together with a GID entry. The HW vendor driver may
2478 * allocate memory to contain this information and store it in @context
2479 * when a new GID entry is written to. Params are consistent until the
2480 * next call of add_gid or delete_gid. The function should return 0 on
2481 * success or error otherwise. The function could be called
2482 * concurrently for different ports. This function is only called when
2483 * roce_gid_table is used.
2484 */
2485 int (*add_gid)(const struct ib_gid_attr *attr, void **context);
2486 /*
2487 * When calling del_gid, the HW vendor's driver should delete the
2488 * gid of device @device at gid index gid_index of port port_num
2489 * available in @attr.
2490 * Upon the deletion of a GID entry, the HW vendor must free any
2491 * allocated memory. The caller will clear @context afterwards.
2492 * This function is only called when roce_gid_table is used.
2493 */
2494 int (*del_gid)(const struct ib_gid_attr *attr, void **context);
2495 int (*query_pkey)(struct ib_device *device, u32 port_num, u16 index,
2496 u16 *pkey);
2497 int (*alloc_ucontext)(struct ib_ucontext *context,
2498 struct ib_udata *udata);
2499 void (*dealloc_ucontext)(struct ib_ucontext *context);
2500 int (*mmap)(struct ib_ucontext *context, struct vm_area_struct *vma);
2501 /*
2502 * This will be called once refcount of an entry in mmap_xa reaches
2503 * zero. The type of the memory that was mapped may differ between
2504 * entries and is opaque to the rdma_user_mmap interface.
2505 * Therefore needs to be implemented by the driver in mmap_free.
2506 */
2507 void (*mmap_free)(struct rdma_user_mmap_entry *entry);
2508 int (*mmap_get_pfns)(struct rdma_user_mmap_entry *entry,
2509 struct phys_vec *phys_vec,
2510 struct p2pdma_provider **provider);
2511 struct rdma_user_mmap_entry *(*pgoff_to_mmap_entry)(struct ib_ucontext *ucontext,
2512 off_t pg_off);
2513 void (*disassociate_ucontext)(struct ib_ucontext *ibcontext);
2514 int (*alloc_pd)(struct ib_pd *pd, struct ib_udata *udata);
2515 int (*dealloc_pd)(struct ib_pd *pd, struct ib_udata *udata);
2516 int (*create_ah)(struct ib_ah *ah, struct rdma_ah_init_attr *attr,
2517 struct ib_udata *udata);
2518 int (*create_user_ah)(struct ib_ah *ah, struct rdma_ah_init_attr *attr,
2519 struct ib_udata *udata);
2520 int (*modify_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);
2521 int (*query_ah)(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);
2522 int (*destroy_ah)(struct ib_ah *ah, u32 flags);
2523 int (*create_srq)(struct ib_srq *srq,
2524 struct ib_srq_init_attr *srq_init_attr,
2525 struct ib_udata *udata);
2526 int (*modify_srq)(struct ib_srq *srq, struct ib_srq_attr *srq_attr,
2527 enum ib_srq_attr_mask srq_attr_mask,
2528 struct ib_udata *udata);
2529 int (*query_srq)(struct ib_srq *srq, struct ib_srq_attr *srq_attr);
2530 int (*destroy_srq)(struct ib_srq *srq, struct ib_udata *udata);
2531 int (*create_qp)(struct ib_qp *qp, struct ib_qp_init_attr *qp_init_attr,
2532 struct ib_udata *udata);
2533 int (*modify_qp)(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
2534 int qp_attr_mask, struct ib_udata *udata);
2535 int (*query_qp)(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
2536 int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr);
2537 int (*destroy_qp)(struct ib_qp *qp, struct ib_udata *udata);
2538 int (*create_cq)(struct ib_cq *cq, const struct ib_cq_init_attr *attr,
2539 struct uverbs_attr_bundle *attrs);
2540 int (*create_cq_umem)(struct ib_cq *cq,
2541 const struct ib_cq_init_attr *attr,
2542 struct ib_umem *umem,
2543 struct uverbs_attr_bundle *attrs);
2544 int (*modify_cq)(struct ib_cq *cq, u16 cq_count, u16 cq_period);
2545 int (*destroy_cq)(struct ib_cq *cq, struct ib_udata *udata);
2546 int (*resize_cq)(struct ib_cq *cq, int cqe, struct ib_udata *udata);
2547 /*
2548 * pre_destroy_cq - Prevent a cq from generating any new work
2549 * completions, but not free any kernel resources
2550 */
2551 int (*pre_destroy_cq)(struct ib_cq *cq);
2552 /*
2553 * post_destroy_cq - Free all kernel resources
2554 */
2555 void (*post_destroy_cq)(struct ib_cq *cq);
2556 struct ib_mr *(*get_dma_mr)(struct ib_pd *pd, int mr_access_flags);
2557 struct ib_mr *(*reg_user_mr)(struct ib_pd *pd, u64 start, u64 length,
2558 u64 virt_addr, int mr_access_flags,
2559 struct ib_dmah *dmah,
2560 struct ib_udata *udata);
2561 struct ib_mr *(*reg_user_mr_dmabuf)(struct ib_pd *pd, u64 offset,
2562 u64 length, u64 virt_addr, int fd,
2563 int mr_access_flags,
2564 struct ib_dmah *dmah,
2565 struct uverbs_attr_bundle *attrs);
2566 struct ib_mr *(*rereg_user_mr)(struct ib_mr *mr, int flags, u64 start,
2567 u64 length, u64 virt_addr,
2568 int mr_access_flags, struct ib_pd *pd,
2569 struct ib_udata *udata);
2570 int (*dereg_mr)(struct ib_mr *mr, struct ib_udata *udata);
2571 struct ib_mr *(*alloc_mr)(struct ib_pd *pd, enum ib_mr_type mr_type,
2572 u32 max_num_sg);
2573 struct ib_mr *(*alloc_mr_integrity)(struct ib_pd *pd,
2574 u32 max_num_data_sg,
2575 u32 max_num_meta_sg);
2576 int (*advise_mr)(struct ib_pd *pd,
2577 enum ib_uverbs_advise_mr_advice advice, u32 flags,
2578 struct ib_sge *sg_list, u32 num_sge,
2579 struct uverbs_attr_bundle *attrs);
2580
2581 /*
2582 * Kernel users should universally support relaxed ordering (RO), as
2583 * they are designed to read data only after observing the CQE and use
2584 * the DMA API correctly.
2585 *
2586 * Some drivers implicitly enable RO if platform supports it.
2587 */
2588 int (*map_mr_sg)(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
2589 unsigned int *sg_offset);
2590 int (*check_mr_status)(struct ib_mr *mr, u32 check_mask,
2591 struct ib_mr_status *mr_status);
2592 int (*alloc_mw)(struct ib_mw *mw, struct ib_udata *udata);
2593 int (*dealloc_mw)(struct ib_mw *mw);
2594 int (*attach_mcast)(struct ib_qp *qp, union ib_gid *gid, u16 lid);
2595 int (*detach_mcast)(struct ib_qp *qp, union ib_gid *gid, u16 lid);
2596 int (*alloc_xrcd)(struct ib_xrcd *xrcd, struct ib_udata *udata);
2597 int (*dealloc_xrcd)(struct ib_xrcd *xrcd, struct ib_udata *udata);
2598 struct ib_flow *(*create_flow)(struct ib_qp *qp,
2599 struct ib_flow_attr *flow_attr,
2600 struct ib_udata *udata);
2601 int (*destroy_flow)(struct ib_flow *flow_id);
2602 int (*destroy_flow_action)(struct ib_flow_action *action);
2603 int (*set_vf_link_state)(struct ib_device *device, int vf, u32 port,
2604 int state);
2605 int (*get_vf_config)(struct ib_device *device, int vf, u32 port,
2606 struct ifla_vf_info *ivf);
2607 int (*get_vf_stats)(struct ib_device *device, int vf, u32 port,
2608 struct ifla_vf_stats *stats);
2609 int (*get_vf_guid)(struct ib_device *device, int vf, u32 port,
2610 struct ifla_vf_guid *node_guid,
2611 struct ifla_vf_guid *port_guid);
2612 int (*set_vf_guid)(struct ib_device *device, int vf, u32 port, u64 guid,
2613 int type);
2614 struct ib_wq *(*create_wq)(struct ib_pd *pd,
2615 struct ib_wq_init_attr *init_attr,
2616 struct ib_udata *udata);
2617 int (*destroy_wq)(struct ib_wq *wq, struct ib_udata *udata);
2618 int (*modify_wq)(struct ib_wq *wq, struct ib_wq_attr *attr,
2619 u32 wq_attr_mask, struct ib_udata *udata);
2620 int (*create_rwq_ind_table)(struct ib_rwq_ind_table *ib_rwq_ind_table,
2621 struct ib_rwq_ind_table_init_attr *init_attr,
2622 struct ib_udata *udata);
2623 int (*destroy_rwq_ind_table)(struct ib_rwq_ind_table *wq_ind_table);
2624 struct ib_dm *(*alloc_dm)(struct ib_device *device,
2625 struct ib_ucontext *context,
2626 struct ib_dm_alloc_attr *attr,
2627 struct uverbs_attr_bundle *attrs);
2628 int (*dealloc_dm)(struct ib_dm *dm, struct uverbs_attr_bundle *attrs);
2629 int (*alloc_dmah)(struct ib_dmah *ibdmah,
2630 struct uverbs_attr_bundle *attrs);
2631 int (*dealloc_dmah)(struct ib_dmah *dmah, struct uverbs_attr_bundle *attrs);
2632 struct ib_mr *(*reg_dm_mr)(struct ib_pd *pd, struct ib_dm *dm,
2633 struct ib_dm_mr_attr *attr,
2634 struct uverbs_attr_bundle *attrs);
2635 int (*create_counters)(struct ib_counters *counters,
2636 struct uverbs_attr_bundle *attrs);
2637 int (*destroy_counters)(struct ib_counters *counters);
2638 int (*read_counters)(struct ib_counters *counters,
2639 struct ib_counters_read_attr *counters_read_attr,
2640 struct uverbs_attr_bundle *attrs);
2641 int (*map_mr_sg_pi)(struct ib_mr *mr, struct scatterlist *data_sg,
2642 int data_sg_nents, unsigned int *data_sg_offset,
2643 struct scatterlist *meta_sg, int meta_sg_nents,
2644 unsigned int *meta_sg_offset);
2645
2646 /*
2647 * alloc_hw_[device,port]_stats - Allocate a struct rdma_hw_stats and
2648 * fill in the driver initialized data. The struct is kfree()'ed by
2649 * the sysfs core when the device is removed. A lifespan of -1 in the
2650 * return struct tells the core to set a default lifespan.
2651 */
2652 struct rdma_hw_stats *(*alloc_hw_device_stats)(struct ib_device *device);
2653 struct rdma_hw_stats *(*alloc_hw_port_stats)(struct ib_device *device,
2654 u32 port_num);
2655 /*
2656 * get_hw_stats - Fill in the counter value(s) in the stats struct.
2657 * @index - The index in the value array we wish to have updated, or
2658 * num_counters if we want all stats updated
2659 * Return codes -
2660 * < 0 - Error, no counters updated
2661 * index - Updated the single counter pointed to by index
2662 * num_counters - Updated all counters (will reset the timestamp
2663 * and prevent further calls for lifespan milliseconds)
2664 * Drivers are allowed to update all counters in leiu of just the
2665 * one given in index at their option
2666 */
2667 int (*get_hw_stats)(struct ib_device *device,
2668 struct rdma_hw_stats *stats, u32 port, int index);
2669
2670 /*
2671 * modify_hw_stat - Modify the counter configuration
2672 * @enable: true/false when enable/disable a counter
2673 * Return codes - 0 on success or error code otherwise.
2674 */
2675 int (*modify_hw_stat)(struct ib_device *device, u32 port,
2676 unsigned int counter_index, bool enable);
2677 /*
2678 * Allows rdma drivers to add their own restrack attributes.
2679 */
2680 int (*fill_res_mr_entry)(struct sk_buff *msg, struct ib_mr *ibmr);
2681 int (*fill_res_mr_entry_raw)(struct sk_buff *msg, struct ib_mr *ibmr);
2682 int (*fill_res_cq_entry)(struct sk_buff *msg, struct ib_cq *ibcq);
2683 int (*fill_res_cq_entry_raw)(struct sk_buff *msg, struct ib_cq *ibcq);
2684 int (*fill_res_qp_entry)(struct sk_buff *msg, struct ib_qp *ibqp);
2685 int (*fill_res_qp_entry_raw)(struct sk_buff *msg, struct ib_qp *ibqp);
2686 int (*fill_res_cm_id_entry)(struct sk_buff *msg, struct rdma_cm_id *id);
2687 int (*fill_res_srq_entry)(struct sk_buff *msg, struct ib_srq *ib_srq);
2688 int (*fill_res_srq_entry_raw)(struct sk_buff *msg, struct ib_srq *ib_srq);
2689
2690 /* Device lifecycle callbacks */
2691 /*
2692 * Called after the device becomes registered, before clients are
2693 * attached
2694 */
2695 int (*enable_driver)(struct ib_device *dev);
2696 /*
2697 * This is called as part of ib_dealloc_device().
2698 */
2699 void (*dealloc_driver)(struct ib_device *dev);
2700
2701 /* iWarp CM callbacks */
2702 void (*iw_add_ref)(struct ib_qp *qp);
2703 void (*iw_rem_ref)(struct ib_qp *qp);
2704 struct ib_qp *(*iw_get_qp)(struct ib_device *device, int qpn);
2705 int (*iw_connect)(struct iw_cm_id *cm_id,
2706 struct iw_cm_conn_param *conn_param);
2707 int (*iw_accept)(struct iw_cm_id *cm_id,
2708 struct iw_cm_conn_param *conn_param);
2709 int (*iw_reject)(struct iw_cm_id *cm_id, const void *pdata,
2710 u8 pdata_len);
2711 int (*iw_create_listen)(struct iw_cm_id *cm_id, int backlog);
2712 int (*iw_destroy_listen)(struct iw_cm_id *cm_id);
2713 /*
2714 * counter_bind_qp - Bind a QP to a counter.
2715 * @counter - The counter to be bound. If counter->id is zero then
2716 * the driver needs to allocate a new counter and set counter->id
2717 */
2718 int (*counter_bind_qp)(struct rdma_counter *counter, struct ib_qp *qp,
2719 u32 port);
2720 /*
2721 * counter_unbind_qp - Unbind the qp from the dynamically-allocated
2722 * counter and bind it onto the default one
2723 */
2724 int (*counter_unbind_qp)(struct ib_qp *qp, u32 port);
2725 /*
2726 * counter_dealloc -De-allocate the hw counter
2727 */
2728 int (*counter_dealloc)(struct rdma_counter *counter);
2729 /*
2730 * counter_alloc_stats - Allocate a struct rdma_hw_stats and fill in
2731 * the driver initialized data.
2732 */
2733 struct rdma_hw_stats *(*counter_alloc_stats)(
2734 struct rdma_counter *counter);
2735 /*
2736 * counter_update_stats - Query the stats value of this counter
2737 */
2738 int (*counter_update_stats)(struct rdma_counter *counter);
2739
2740 /*
2741 * counter_init - Initialize the driver specific rdma counter struct.
2742 */
2743 void (*counter_init)(struct rdma_counter *counter);
2744
2745 /*
2746 * Allows rdma drivers to add their own restrack attributes
2747 * dumped via 'rdma stat' iproute2 command.
2748 */
2749 int (*fill_stat_mr_entry)(struct sk_buff *msg, struct ib_mr *ibmr);
2750
2751 /* query driver for its ucontext properties */
2752 int (*query_ucontext)(struct ib_ucontext *context,
2753 struct uverbs_attr_bundle *attrs);
2754
2755 /*
2756 * Provide NUMA node. This API exists for rdmavt/hfi1 only.
2757 * Everyone else relies on Linux memory management model.
2758 */
2759 int (*get_numa_node)(struct ib_device *dev);
2760
2761 /*
2762 * add_sub_dev - Add a sub IB device
2763 */
2764 struct ib_device *(*add_sub_dev)(struct ib_device *parent,
2765 enum rdma_nl_dev_type type,
2766 const char *name);
2767
2768 /*
2769 * del_sub_dev - Delete a sub IB device
2770 */
2771 void (*del_sub_dev)(struct ib_device *sub_dev);
2772
2773 /*
2774 * ufile_cleanup - Attempt to cleanup ubojects HW resources inside
2775 * the ufile.
2776 */
2777 void (*ufile_hw_cleanup)(struct ib_uverbs_file *ufile);
2778
2779 /*
2780 * report_port_event - Drivers need to implement this if they have
2781 * some private stuff to handle when link status changes.
2782 */
2783 void (*report_port_event)(struct ib_device *ibdev,
2784 struct net_device *ndev, unsigned long event);
2785
2786 DECLARE_RDMA_OBJ_SIZE(ib_ah);
2787 DECLARE_RDMA_OBJ_SIZE(ib_counters);
2788 DECLARE_RDMA_OBJ_SIZE(ib_cq);
2789 DECLARE_RDMA_OBJ_SIZE(ib_dmah);
2790 DECLARE_RDMA_OBJ_SIZE(ib_mw);
2791 DECLARE_RDMA_OBJ_SIZE(ib_pd);
2792 DECLARE_RDMA_OBJ_SIZE(ib_qp);
2793 DECLARE_RDMA_OBJ_SIZE(ib_rwq_ind_table);
2794 DECLARE_RDMA_OBJ_SIZE(ib_srq);
2795 DECLARE_RDMA_OBJ_SIZE(ib_ucontext);
2796 DECLARE_RDMA_OBJ_SIZE(ib_xrcd);
2797 DECLARE_RDMA_OBJ_SIZE(rdma_counter);
2798 };
2799
2800 struct ib_core_device {
2801 /* device must be the first element in structure until,
2802 * union of ib_core_device and device exists in ib_device.
2803 */
2804 struct device dev;
2805 possible_net_t rdma_net;
2806 struct kobject *ports_kobj;
2807 struct list_head port_list;
2808 struct ib_device *owner; /* reach back to owner ib_device */
2809 };
2810
2811 struct rdma_restrack_root;
2812 struct ib_device {
2813 /* Do not access @dma_device directly from ULP nor from HW drivers. */
2814 struct device *dma_device;
2815 struct ib_device_ops ops;
2816 char name[IB_DEVICE_NAME_MAX];
2817 struct rcu_head rcu_head;
2818
2819 struct list_head event_handler_list;
2820 /* Protects event_handler_list */
2821 struct rw_semaphore event_handler_rwsem;
2822
2823 /* Protects QP's event_handler calls and open_qp list */
2824 spinlock_t qp_open_list_lock;
2825
2826 struct rw_semaphore client_data_rwsem;
2827 struct xarray client_data;
2828 struct mutex unregistration_lock;
2829
2830 /* Synchronize GID, Pkey cache entries, subnet prefix, LMC */
2831 rwlock_t cache_lock;
2832 /**
2833 * port_data is indexed by port number
2834 */
2835 struct ib_port_data *port_data;
2836
2837 int num_comp_vectors;
2838
2839 union {
2840 struct device dev;
2841 struct ib_core_device coredev;
2842 };
2843
2844 /* First group is for device attributes,
2845 * Second group is for driver provided attributes (optional).
2846 * Third group is for the hw_stats
2847 * It is a NULL terminated array.
2848 */
2849 const struct attribute_group *groups[4];
2850 u8 hw_stats_attr_index;
2851
2852 u64 uverbs_cmd_mask;
2853
2854 char node_desc[IB_DEVICE_NODE_DESC_MAX];
2855 __be64 node_guid;
2856 u32 local_dma_lkey;
2857 u16 is_switch:1;
2858 /* Indicates kernel verbs support, should not be used in drivers */
2859 u16 kverbs_provider:1;
2860 /* CQ adaptive moderation (RDMA DIM) */
2861 u16 use_cq_dim:1;
2862 u8 node_type;
2863 u32 phys_port_cnt;
2864 struct ib_device_attr attrs;
2865 struct hw_stats_device_data *hw_stats_data;
2866
2867 #ifdef CONFIG_CGROUP_RDMA
2868 struct rdmacg_device cg_device;
2869 #endif
2870
2871 u32 index;
2872
2873 spinlock_t cq_pools_lock;
2874 struct list_head cq_pools[IB_POLL_LAST_POOL_TYPE + 1];
2875
2876 struct rdma_restrack_root *res;
2877
2878 const struct uapi_definition *driver_def;
2879
2880 /*
2881 * Positive refcount indicates that the device is currently
2882 * registered and cannot be unregistered.
2883 */
2884 refcount_t refcount;
2885 struct completion unreg_completion;
2886 struct work_struct unregistration_work;
2887
2888 const struct rdma_link_ops *link_ops;
2889
2890 /* Protects compat_devs xarray modifications */
2891 struct mutex compat_devs_mutex;
2892 /* Maintains compat devices for each net namespace */
2893 struct xarray compat_devs;
2894
2895 /* Used by iWarp CM */
2896 char iw_ifname[IFNAMSIZ];
2897 u32 iw_driver_flags;
2898 u32 lag_flags;
2899
2900 /* A parent device has a list of sub-devices */
2901 struct mutex subdev_lock;
2902 struct list_head subdev_list_head;
2903
2904 /* A sub device has a type and a parent */
2905 enum rdma_nl_dev_type type;
2906 struct ib_device *parent;
2907 struct list_head subdev_list;
2908
2909 enum rdma_nl_name_assign_type name_assign_type;
2910 };
2911
rdma_zalloc_obj(struct ib_device * dev,size_t size,gfp_t gfp,bool is_numa_aware)2912 static inline void *rdma_zalloc_obj(struct ib_device *dev, size_t size,
2913 gfp_t gfp, bool is_numa_aware)
2914 {
2915 if (is_numa_aware && dev->ops.get_numa_node)
2916 return kzalloc_node(size, gfp, dev->ops.get_numa_node(dev));
2917
2918 return kzalloc(size, gfp);
2919 }
2920
2921 struct ib_client_nl_info;
2922 struct ib_client {
2923 const char *name;
2924 int (*add)(struct ib_device *ibdev);
2925 void (*remove)(struct ib_device *, void *client_data);
2926 void (*rename)(struct ib_device *dev, void *client_data);
2927 int (*get_nl_info)(struct ib_device *ibdev, void *client_data,
2928 struct ib_client_nl_info *res);
2929 int (*get_global_nl_info)(struct ib_client_nl_info *res);
2930
2931 /* Returns the net_dev belonging to this ib_client and matching the
2932 * given parameters.
2933 * @dev: An RDMA device that the net_dev use for communication.
2934 * @port: A physical port number on the RDMA device.
2935 * @pkey: P_Key that the net_dev uses if applicable.
2936 * @gid: A GID that the net_dev uses to communicate.
2937 * @addr: An IP address the net_dev is configured with.
2938 * @client_data: The device's client data set by ib_set_client_data().
2939 *
2940 * An ib_client that implements a net_dev on top of RDMA devices
2941 * (such as IP over IB) should implement this callback, allowing the
2942 * rdma_cm module to find the right net_dev for a given request.
2943 *
2944 * The caller is responsible for calling dev_put on the returned
2945 * netdev. */
2946 struct net_device *(*get_net_dev_by_params)(
2947 struct ib_device *dev,
2948 u32 port,
2949 u16 pkey,
2950 const union ib_gid *gid,
2951 const struct sockaddr *addr,
2952 void *client_data);
2953
2954 refcount_t uses;
2955 struct completion uses_zero;
2956 u32 client_id;
2957
2958 /* kverbs are not required by the client */
2959 u8 no_kverbs_req:1;
2960 };
2961
2962 /*
2963 * IB block DMA iterator
2964 *
2965 * Iterates the DMA-mapped SGL in contiguous memory blocks aligned
2966 * to a HW supported page size.
2967 */
2968 struct ib_block_iter {
2969 /* internal states */
2970 struct scatterlist *__sg; /* sg holding the current aligned block */
2971 dma_addr_t __dma_addr; /* unaligned DMA address of this block */
2972 size_t __sg_numblocks; /* ib_umem_num_dma_blocks() */
2973 unsigned int __sg_nents; /* number of SG entries */
2974 unsigned int __sg_advance; /* number of bytes to advance in sg in next step */
2975 unsigned int __pg_bit; /* alignment of current block */
2976 };
2977
2978 struct ib_device *_ib_alloc_device(size_t size, struct net *net);
2979 #define ib_alloc_device(drv_struct, member) \
2980 container_of(_ib_alloc_device(sizeof(struct drv_struct) + \
2981 BUILD_BUG_ON_ZERO(offsetof( \
2982 struct drv_struct, member)), \
2983 &init_net), \
2984 struct drv_struct, member)
2985
2986 #define ib_alloc_device_with_net(drv_struct, member, net) \
2987 container_of(_ib_alloc_device(sizeof(struct drv_struct) + \
2988 BUILD_BUG_ON_ZERO(offsetof( \
2989 struct drv_struct, member)), net), \
2990 struct drv_struct, member)
2991
2992 void ib_dealloc_device(struct ib_device *device);
2993
2994 void ib_get_device_fw_str(struct ib_device *device, char *str);
2995
2996 int ib_register_device(struct ib_device *device, const char *name,
2997 struct device *dma_device);
2998 void ib_unregister_device(struct ib_device *device);
2999 void ib_unregister_driver(enum rdma_driver_id driver_id);
3000 void ib_unregister_device_and_put(struct ib_device *device);
3001 void ib_unregister_device_queued(struct ib_device *ib_dev);
3002
3003 int ib_register_client (struct ib_client *client);
3004 void ib_unregister_client(struct ib_client *client);
3005
3006 void __rdma_block_iter_start(struct ib_block_iter *biter,
3007 struct scatterlist *sglist,
3008 unsigned int nents,
3009 unsigned long pgsz);
3010 bool __rdma_block_iter_next(struct ib_block_iter *biter);
3011
3012 /**
3013 * rdma_block_iter_dma_address - get the aligned dma address of the current
3014 * block held by the block iterator.
3015 * @biter: block iterator holding the memory block
3016 */
3017 static inline dma_addr_t
rdma_block_iter_dma_address(struct ib_block_iter * biter)3018 rdma_block_iter_dma_address(struct ib_block_iter *biter)
3019 {
3020 return biter->__dma_addr & ~(BIT_ULL(biter->__pg_bit) - 1);
3021 }
3022
3023 /**
3024 * rdma_for_each_block - iterate over contiguous memory blocks of the sg list
3025 * @sglist: sglist to iterate over
3026 * @biter: block iterator holding the memory block
3027 * @nents: maximum number of sg entries to iterate over
3028 * @pgsz: best HW supported page size to use
3029 *
3030 * Callers may use rdma_block_iter_dma_address() to get each
3031 * blocks aligned DMA address.
3032 */
3033 #define rdma_for_each_block(sglist, biter, nents, pgsz) \
3034 for (__rdma_block_iter_start(biter, sglist, nents, \
3035 pgsz); \
3036 __rdma_block_iter_next(biter);)
3037
3038 /**
3039 * ib_get_client_data - Get IB client context
3040 * @device:Device to get context for
3041 * @client:Client to get context for
3042 *
3043 * ib_get_client_data() returns the client context data set with
3044 * ib_set_client_data(). This can only be called while the client is
3045 * registered to the device, once the ib_client remove() callback returns this
3046 * cannot be called.
3047 */
ib_get_client_data(struct ib_device * device,struct ib_client * client)3048 static inline void *ib_get_client_data(struct ib_device *device,
3049 struct ib_client *client)
3050 {
3051 return xa_load(&device->client_data, client->client_id);
3052 }
3053 void ib_set_client_data(struct ib_device *device, struct ib_client *client,
3054 void *data);
3055 void ib_set_device_ops(struct ib_device *device,
3056 const struct ib_device_ops *ops);
3057
3058 int rdma_user_mmap_io(struct ib_ucontext *ucontext, struct vm_area_struct *vma,
3059 unsigned long pfn, unsigned long size, pgprot_t prot,
3060 struct rdma_user_mmap_entry *entry);
3061 int rdma_user_mmap_entry_insert(struct ib_ucontext *ucontext,
3062 struct rdma_user_mmap_entry *entry,
3063 size_t length);
3064 int rdma_user_mmap_entry_insert_range(struct ib_ucontext *ucontext,
3065 struct rdma_user_mmap_entry *entry,
3066 size_t length, u32 min_pgoff,
3067 u32 max_pgoff);
3068
3069 #if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS)
3070 void rdma_user_mmap_disassociate(struct ib_device *device);
3071 #else
rdma_user_mmap_disassociate(struct ib_device * device)3072 static inline void rdma_user_mmap_disassociate(struct ib_device *device)
3073 {
3074 }
3075 #endif
3076
3077 static inline int
rdma_user_mmap_entry_insert_exact(struct ib_ucontext * ucontext,struct rdma_user_mmap_entry * entry,size_t length,u32 pgoff)3078 rdma_user_mmap_entry_insert_exact(struct ib_ucontext *ucontext,
3079 struct rdma_user_mmap_entry *entry,
3080 size_t length, u32 pgoff)
3081 {
3082 return rdma_user_mmap_entry_insert_range(ucontext, entry, length, pgoff,
3083 pgoff);
3084 }
3085
3086 struct rdma_user_mmap_entry *
3087 rdma_user_mmap_entry_get_pgoff(struct ib_ucontext *ucontext,
3088 unsigned long pgoff);
3089 struct rdma_user_mmap_entry *
3090 rdma_user_mmap_entry_get(struct ib_ucontext *ucontext,
3091 struct vm_area_struct *vma);
3092 void rdma_user_mmap_entry_put(struct rdma_user_mmap_entry *entry);
3093
3094 void rdma_user_mmap_entry_remove(struct rdma_user_mmap_entry *entry);
3095
ib_copy_from_udata(void * dest,struct ib_udata * udata,size_t len)3096 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)
3097 {
3098 return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0;
3099 }
3100
ib_copy_to_udata(struct ib_udata * udata,void * src,size_t len)3101 static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len)
3102 {
3103 return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0;
3104 }
3105
ib_is_buffer_cleared(const void __user * p,size_t len)3106 static inline bool ib_is_buffer_cleared(const void __user *p,
3107 size_t len)
3108 {
3109 bool ret;
3110 u8 *buf;
3111
3112 if (len > USHRT_MAX)
3113 return false;
3114
3115 buf = memdup_user(p, len);
3116 if (IS_ERR(buf))
3117 return false;
3118
3119 ret = !memchr_inv(buf, 0, len);
3120 kfree(buf);
3121 return ret;
3122 }
3123
ib_is_udata_cleared(struct ib_udata * udata,size_t offset,size_t len)3124 static inline bool ib_is_udata_cleared(struct ib_udata *udata,
3125 size_t offset,
3126 size_t len)
3127 {
3128 return ib_is_buffer_cleared(udata->inbuf + offset, len);
3129 }
3130
3131 /**
3132 * ib_modify_qp_is_ok - Check that the supplied attribute mask
3133 * contains all required attributes and no attributes not allowed for
3134 * the given QP state transition.
3135 * @cur_state: Current QP state
3136 * @next_state: Next QP state
3137 * @type: QP type
3138 * @mask: Mask of supplied QP attributes
3139 *
3140 * This function is a helper function that a low-level driver's
3141 * modify_qp method can use to validate the consumer's input. It
3142 * checks that cur_state and next_state are valid QP states, that a
3143 * transition from cur_state to next_state is allowed by the IB spec,
3144 * and that the attribute mask supplied is allowed for the transition.
3145 */
3146 bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
3147 enum ib_qp_type type, enum ib_qp_attr_mask mask);
3148
3149 void ib_register_event_handler(struct ib_event_handler *event_handler);
3150 void ib_unregister_event_handler(struct ib_event_handler *event_handler);
3151 void ib_dispatch_event(const struct ib_event *event);
3152
3153 int ib_query_port(struct ib_device *device,
3154 u32 port_num, struct ib_port_attr *port_attr);
3155
3156 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
3157 u32 port_num);
3158
3159 /**
3160 * rdma_cap_ib_switch - Check if the device is IB switch
3161 * @device: Device to check
3162 *
3163 * Device driver is responsible for setting is_switch bit on
3164 * in ib_device structure at init time.
3165 *
3166 * Return: true if the device is IB switch.
3167 */
rdma_cap_ib_switch(const struct ib_device * device)3168 static inline bool rdma_cap_ib_switch(const struct ib_device *device)
3169 {
3170 return device->is_switch;
3171 }
3172
3173 /**
3174 * rdma_start_port - Return the first valid port number for the device
3175 * specified
3176 *
3177 * @device: Device to be checked
3178 *
3179 * Return start port number
3180 */
rdma_start_port(const struct ib_device * device)3181 static inline u32 rdma_start_port(const struct ib_device *device)
3182 {
3183 return rdma_cap_ib_switch(device) ? 0 : 1;
3184 }
3185
3186 /**
3187 * rdma_for_each_port - Iterate over all valid port numbers of the IB device
3188 * @device: The struct ib_device * to iterate over
3189 * @iter: The unsigned int to store the port number
3190 */
3191 #define rdma_for_each_port(device, iter) \
3192 for (iter = rdma_start_port(device + \
3193 BUILD_BUG_ON_ZERO(!__same_type(u32, \
3194 iter))); \
3195 iter <= rdma_end_port(device); iter++)
3196
3197 /**
3198 * rdma_end_port - Return the last valid port number for the device
3199 * specified
3200 *
3201 * @device: Device to be checked
3202 *
3203 * Return last port number
3204 */
rdma_end_port(const struct ib_device * device)3205 static inline u32 rdma_end_port(const struct ib_device *device)
3206 {
3207 return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt;
3208 }
3209
rdma_is_port_valid(const struct ib_device * device,unsigned int port)3210 static inline int rdma_is_port_valid(const struct ib_device *device,
3211 unsigned int port)
3212 {
3213 return (port >= rdma_start_port(device) &&
3214 port <= rdma_end_port(device));
3215 }
3216
rdma_is_grh_required(const struct ib_device * device,u32 port_num)3217 static inline bool rdma_is_grh_required(const struct ib_device *device,
3218 u32 port_num)
3219 {
3220 return device->port_data[port_num].immutable.core_cap_flags &
3221 RDMA_CORE_PORT_IB_GRH_REQUIRED;
3222 }
3223
rdma_protocol_ib(const struct ib_device * device,u32 port_num)3224 static inline bool rdma_protocol_ib(const struct ib_device *device,
3225 u32 port_num)
3226 {
3227 return device->port_data[port_num].immutable.core_cap_flags &
3228 RDMA_CORE_CAP_PROT_IB;
3229 }
3230
rdma_protocol_roce(const struct ib_device * device,u32 port_num)3231 static inline bool rdma_protocol_roce(const struct ib_device *device,
3232 u32 port_num)
3233 {
3234 return device->port_data[port_num].immutable.core_cap_flags &
3235 (RDMA_CORE_CAP_PROT_ROCE | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP);
3236 }
3237
rdma_protocol_roce_udp_encap(const struct ib_device * device,u32 port_num)3238 static inline bool rdma_protocol_roce_udp_encap(const struct ib_device *device,
3239 u32 port_num)
3240 {
3241 return device->port_data[port_num].immutable.core_cap_flags &
3242 RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
3243 }
3244
rdma_protocol_roce_eth_encap(const struct ib_device * device,u32 port_num)3245 static inline bool rdma_protocol_roce_eth_encap(const struct ib_device *device,
3246 u32 port_num)
3247 {
3248 return device->port_data[port_num].immutable.core_cap_flags &
3249 RDMA_CORE_CAP_PROT_ROCE;
3250 }
3251
rdma_protocol_iwarp(const struct ib_device * device,u32 port_num)3252 static inline bool rdma_protocol_iwarp(const struct ib_device *device,
3253 u32 port_num)
3254 {
3255 return device->port_data[port_num].immutable.core_cap_flags &
3256 RDMA_CORE_CAP_PROT_IWARP;
3257 }
3258
rdma_ib_or_roce(const struct ib_device * device,u32 port_num)3259 static inline bool rdma_ib_or_roce(const struct ib_device *device,
3260 u32 port_num)
3261 {
3262 return rdma_protocol_ib(device, port_num) ||
3263 rdma_protocol_roce(device, port_num);
3264 }
3265
rdma_protocol_raw_packet(const struct ib_device * device,u32 port_num)3266 static inline bool rdma_protocol_raw_packet(const struct ib_device *device,
3267 u32 port_num)
3268 {
3269 return device->port_data[port_num].immutable.core_cap_flags &
3270 RDMA_CORE_CAP_PROT_RAW_PACKET;
3271 }
3272
rdma_protocol_usnic(const struct ib_device * device,u32 port_num)3273 static inline bool rdma_protocol_usnic(const struct ib_device *device,
3274 u32 port_num)
3275 {
3276 return device->port_data[port_num].immutable.core_cap_flags &
3277 RDMA_CORE_CAP_PROT_USNIC;
3278 }
3279
3280 /**
3281 * rdma_cap_ib_mad - Check if the port of a device supports Infiniband
3282 * Management Datagrams.
3283 * @device: Device to check
3284 * @port_num: Port number to check
3285 *
3286 * Management Datagrams (MAD) are a required part of the InfiniBand
3287 * specification and are supported on all InfiniBand devices. A slightly
3288 * extended version are also supported on OPA interfaces.
3289 *
3290 * Return: true if the port supports sending/receiving of MAD packets.
3291 */
rdma_cap_ib_mad(const struct ib_device * device,u32 port_num)3292 static inline bool rdma_cap_ib_mad(const struct ib_device *device, u32 port_num)
3293 {
3294 return device->port_data[port_num].immutable.core_cap_flags &
3295 RDMA_CORE_CAP_IB_MAD;
3296 }
3297
3298 /**
3299 * rdma_cap_opa_mad - Check if the port of device provides support for OPA
3300 * Management Datagrams.
3301 * @device: Device to check
3302 * @port_num: Port number to check
3303 *
3304 * Intel OmniPath devices extend and/or replace the InfiniBand Management
3305 * datagrams with their own versions. These OPA MADs share many but not all of
3306 * the characteristics of InfiniBand MADs.
3307 *
3308 * OPA MADs differ in the following ways:
3309 *
3310 * 1) MADs are variable size up to 2K
3311 * IBTA defined MADs remain fixed at 256 bytes
3312 * 2) OPA SMPs must carry valid PKeys
3313 * 3) OPA SMP packets are a different format
3314 *
3315 * Return: true if the port supports OPA MAD packet formats.
3316 */
rdma_cap_opa_mad(struct ib_device * device,u32 port_num)3317 static inline bool rdma_cap_opa_mad(struct ib_device *device, u32 port_num)
3318 {
3319 return device->port_data[port_num].immutable.core_cap_flags &
3320 RDMA_CORE_CAP_OPA_MAD;
3321 }
3322
3323 /**
3324 * rdma_cap_ib_smi - Check if the port of a device provides an Infiniband
3325 * Subnet Management Agent (SMA) on the Subnet Management Interface (SMI).
3326 * @device: Device to check
3327 * @port_num: Port number to check
3328 *
3329 * Each InfiniBand node is required to provide a Subnet Management Agent
3330 * that the subnet manager can access. Prior to the fabric being fully
3331 * configured by the subnet manager, the SMA is accessed via a well known
3332 * interface called the Subnet Management Interface (SMI). This interface
3333 * uses directed route packets to communicate with the SM to get around the
3334 * chicken and egg problem of the SM needing to know what's on the fabric
3335 * in order to configure the fabric, and needing to configure the fabric in
3336 * order to send packets to the devices on the fabric. These directed
3337 * route packets do not need the fabric fully configured in order to reach
3338 * their destination. The SMI is the only method allowed to send
3339 * directed route packets on an InfiniBand fabric.
3340 *
3341 * Return: true if the port provides an SMI.
3342 */
rdma_cap_ib_smi(const struct ib_device * device,u32 port_num)3343 static inline bool rdma_cap_ib_smi(const struct ib_device *device, u32 port_num)
3344 {
3345 return device->port_data[port_num].immutable.core_cap_flags &
3346 RDMA_CORE_CAP_IB_SMI;
3347 }
3348
3349 /**
3350 * rdma_cap_ib_cm - Check if the port of device has the capability Infiniband
3351 * Communication Manager.
3352 * @device: Device to check
3353 * @port_num: Port number to check
3354 *
3355 * The InfiniBand Communication Manager is one of many pre-defined General
3356 * Service Agents (GSA) that are accessed via the General Service
3357 * Interface (GSI). It's role is to facilitate establishment of connections
3358 * between nodes as well as other management related tasks for established
3359 * connections.
3360 *
3361 * Return: true if the port supports an IB CM (this does not guarantee that
3362 * a CM is actually running however).
3363 */
rdma_cap_ib_cm(const struct ib_device * device,u32 port_num)3364 static inline bool rdma_cap_ib_cm(const struct ib_device *device, u32 port_num)
3365 {
3366 return device->port_data[port_num].immutable.core_cap_flags &
3367 RDMA_CORE_CAP_IB_CM;
3368 }
3369
3370 /**
3371 * rdma_cap_iw_cm - Check if the port of device has the capability IWARP
3372 * Communication Manager.
3373 * @device: Device to check
3374 * @port_num: Port number to check
3375 *
3376 * Similar to above, but specific to iWARP connections which have a different
3377 * managment protocol than InfiniBand.
3378 *
3379 * Return: true if the port supports an iWARP CM (this does not guarantee that
3380 * a CM is actually running however).
3381 */
rdma_cap_iw_cm(const struct ib_device * device,u32 port_num)3382 static inline bool rdma_cap_iw_cm(const struct ib_device *device, u32 port_num)
3383 {
3384 return device->port_data[port_num].immutable.core_cap_flags &
3385 RDMA_CORE_CAP_IW_CM;
3386 }
3387
3388 /**
3389 * rdma_cap_ib_sa - Check if the port of device has the capability Infiniband
3390 * Subnet Administration.
3391 * @device: Device to check
3392 * @port_num: Port number to check
3393 *
3394 * An InfiniBand Subnet Administration (SA) service is a pre-defined General
3395 * Service Agent (GSA) provided by the Subnet Manager (SM). On InfiniBand
3396 * fabrics, devices should resolve routes to other hosts by contacting the
3397 * SA to query the proper route.
3398 *
3399 * Return: true if the port should act as a client to the fabric Subnet
3400 * Administration interface. This does not imply that the SA service is
3401 * running locally.
3402 */
rdma_cap_ib_sa(const struct ib_device * device,u32 port_num)3403 static inline bool rdma_cap_ib_sa(const struct ib_device *device, u32 port_num)
3404 {
3405 return device->port_data[port_num].immutable.core_cap_flags &
3406 RDMA_CORE_CAP_IB_SA;
3407 }
3408
3409 /**
3410 * rdma_cap_ib_mcast - Check if the port of device has the capability Infiniband
3411 * Multicast.
3412 * @device: Device to check
3413 * @port_num: Port number to check
3414 *
3415 * InfiniBand multicast registration is more complex than normal IPv4 or
3416 * IPv6 multicast registration. Each Host Channel Adapter must register
3417 * with the Subnet Manager when it wishes to join a multicast group. It
3418 * should do so only once regardless of how many queue pairs it subscribes
3419 * to this group. And it should leave the group only after all queue pairs
3420 * attached to the group have been detached.
3421 *
3422 * Return: true if the port must undertake the additional adminstrative
3423 * overhead of registering/unregistering with the SM and tracking of the
3424 * total number of queue pairs attached to the multicast group.
3425 */
rdma_cap_ib_mcast(const struct ib_device * device,u32 port_num)3426 static inline bool rdma_cap_ib_mcast(const struct ib_device *device,
3427 u32 port_num)
3428 {
3429 return rdma_cap_ib_sa(device, port_num);
3430 }
3431
3432 /**
3433 * rdma_cap_af_ib - Check if the port of device has the capability
3434 * Native Infiniband Address.
3435 * @device: Device to check
3436 * @port_num: Port number to check
3437 *
3438 * InfiniBand addressing uses a port's GUID + Subnet Prefix to make a default
3439 * GID. RoCE uses a different mechanism, but still generates a GID via
3440 * a prescribed mechanism and port specific data.
3441 *
3442 * Return: true if the port uses a GID address to identify devices on the
3443 * network.
3444 */
rdma_cap_af_ib(const struct ib_device * device,u32 port_num)3445 static inline bool rdma_cap_af_ib(const struct ib_device *device, u32 port_num)
3446 {
3447 return device->port_data[port_num].immutable.core_cap_flags &
3448 RDMA_CORE_CAP_AF_IB;
3449 }
3450
3451 /**
3452 * rdma_cap_eth_ah - Check if the port of device has the capability
3453 * Ethernet Address Handle.
3454 * @device: Device to check
3455 * @port_num: Port number to check
3456 *
3457 * RoCE is InfiniBand over Ethernet, and it uses a well defined technique
3458 * to fabricate GIDs over Ethernet/IP specific addresses native to the
3459 * port. Normally, packet headers are generated by the sending host
3460 * adapter, but when sending connectionless datagrams, we must manually
3461 * inject the proper headers for the fabric we are communicating over.
3462 *
3463 * Return: true if we are running as a RoCE port and must force the
3464 * addition of a Global Route Header built from our Ethernet Address
3465 * Handle into our header list for connectionless packets.
3466 */
rdma_cap_eth_ah(const struct ib_device * device,u32 port_num)3467 static inline bool rdma_cap_eth_ah(const struct ib_device *device, u32 port_num)
3468 {
3469 return device->port_data[port_num].immutable.core_cap_flags &
3470 RDMA_CORE_CAP_ETH_AH;
3471 }
3472
3473 /**
3474 * rdma_cap_opa_ah - Check if the port of device supports
3475 * OPA Address handles
3476 * @device: Device to check
3477 * @port_num: Port number to check
3478 *
3479 * Return: true if we are running on an OPA device which supports
3480 * the extended OPA addressing.
3481 */
rdma_cap_opa_ah(struct ib_device * device,u32 port_num)3482 static inline bool rdma_cap_opa_ah(struct ib_device *device, u32 port_num)
3483 {
3484 return (device->port_data[port_num].immutable.core_cap_flags &
3485 RDMA_CORE_CAP_OPA_AH) == RDMA_CORE_CAP_OPA_AH;
3486 }
3487
3488 /**
3489 * rdma_max_mad_size - Return the max MAD size required by this RDMA Port.
3490 *
3491 * @device: Device
3492 * @port_num: Port number
3493 *
3494 * This MAD size includes the MAD headers and MAD payload. No other headers
3495 * are included.
3496 *
3497 * Return the max MAD size required by the Port. Will return 0 if the port
3498 * does not support MADs
3499 */
rdma_max_mad_size(const struct ib_device * device,u32 port_num)3500 static inline size_t rdma_max_mad_size(const struct ib_device *device,
3501 u32 port_num)
3502 {
3503 return device->port_data[port_num].immutable.max_mad_size;
3504 }
3505
3506 /**
3507 * rdma_cap_roce_gid_table - Check if the port of device uses roce_gid_table
3508 * @device: Device to check
3509 * @port_num: Port number to check
3510 *
3511 * RoCE GID table mechanism manages the various GIDs for a device.
3512 *
3513 * NOTE: if allocating the port's GID table has failed, this call will still
3514 * return true, but any RoCE GID table API will fail.
3515 *
3516 * Return: true if the port uses RoCE GID table mechanism in order to manage
3517 * its GIDs.
3518 */
rdma_cap_roce_gid_table(const struct ib_device * device,u32 port_num)3519 static inline bool rdma_cap_roce_gid_table(const struct ib_device *device,
3520 u32 port_num)
3521 {
3522 return rdma_protocol_roce(device, port_num) &&
3523 device->ops.add_gid && device->ops.del_gid;
3524 }
3525
3526 /*
3527 * Check if the device supports READ W/ INVALIDATE.
3528 */
rdma_cap_read_inv(struct ib_device * dev,u32 port_num)3529 static inline bool rdma_cap_read_inv(struct ib_device *dev, u32 port_num)
3530 {
3531 /*
3532 * iWarp drivers must support READ W/ INVALIDATE. No other protocol
3533 * has support for it yet.
3534 */
3535 return rdma_protocol_iwarp(dev, port_num);
3536 }
3537
3538 /**
3539 * rdma_core_cap_opa_port - Return whether the RDMA Port is OPA or not.
3540 * @device: Device
3541 * @port_num: 1 based Port number
3542 *
3543 * Return true if port is an Intel OPA port , false if not
3544 */
rdma_core_cap_opa_port(struct ib_device * device,u32 port_num)3545 static inline bool rdma_core_cap_opa_port(struct ib_device *device,
3546 u32 port_num)
3547 {
3548 return (device->port_data[port_num].immutable.core_cap_flags &
3549 RDMA_CORE_PORT_INTEL_OPA) == RDMA_CORE_PORT_INTEL_OPA;
3550 }
3551
3552 /**
3553 * rdma_mtu_enum_to_int - Return the mtu of the port as an integer value.
3554 * @device: Device
3555 * @port: Port number
3556 * @mtu: enum value of MTU
3557 *
3558 * Return the MTU size supported by the port as an integer value. Will return
3559 * -1 if enum value of mtu is not supported.
3560 */
rdma_mtu_enum_to_int(struct ib_device * device,u32 port,int mtu)3561 static inline int rdma_mtu_enum_to_int(struct ib_device *device, u32 port,
3562 int mtu)
3563 {
3564 if (rdma_core_cap_opa_port(device, port))
3565 return opa_mtu_enum_to_int((enum opa_mtu)mtu);
3566 else
3567 return ib_mtu_enum_to_int((enum ib_mtu)mtu);
3568 }
3569
3570 /**
3571 * rdma_mtu_from_attr - Return the mtu of the port from the port attribute.
3572 * @device: Device
3573 * @port: Port number
3574 * @attr: port attribute
3575 *
3576 * Return the MTU size supported by the port as an integer value.
3577 */
rdma_mtu_from_attr(struct ib_device * device,u32 port,struct ib_port_attr * attr)3578 static inline int rdma_mtu_from_attr(struct ib_device *device, u32 port,
3579 struct ib_port_attr *attr)
3580 {
3581 if (rdma_core_cap_opa_port(device, port))
3582 return attr->phys_mtu;
3583 else
3584 return ib_mtu_enum_to_int(attr->max_mtu);
3585 }
3586
3587 int ib_set_vf_link_state(struct ib_device *device, int vf, u32 port,
3588 int state);
3589 int ib_get_vf_config(struct ib_device *device, int vf, u32 port,
3590 struct ifla_vf_info *info);
3591 int ib_get_vf_stats(struct ib_device *device, int vf, u32 port,
3592 struct ifla_vf_stats *stats);
3593 int ib_get_vf_guid(struct ib_device *device, int vf, u32 port,
3594 struct ifla_vf_guid *node_guid,
3595 struct ifla_vf_guid *port_guid);
3596 int ib_set_vf_guid(struct ib_device *device, int vf, u32 port, u64 guid,
3597 int type);
3598
3599 int ib_query_pkey(struct ib_device *device,
3600 u32 port_num, u16 index, u16 *pkey);
3601
3602 int ib_modify_device(struct ib_device *device,
3603 int device_modify_mask,
3604 struct ib_device_modify *device_modify);
3605
3606 int ib_modify_port(struct ib_device *device,
3607 u32 port_num, int port_modify_mask,
3608 struct ib_port_modify *port_modify);
3609
3610 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
3611 u32 *port_num, u16 *index);
3612
3613 int ib_find_pkey(struct ib_device *device,
3614 u32 port_num, u16 pkey, u16 *index);
3615
3616 enum ib_pd_flags {
3617 /*
3618 * Create a memory registration for all memory in the system and place
3619 * the rkey for it into pd->unsafe_global_rkey. This can be used by
3620 * ULPs to avoid the overhead of dynamic MRs.
3621 *
3622 * This flag is generally considered unsafe and must only be used in
3623 * extremly trusted environments. Every use of it will log a warning
3624 * in the kernel log.
3625 */
3626 IB_PD_UNSAFE_GLOBAL_RKEY = 0x01,
3627 };
3628
3629 struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
3630 const char *caller);
3631
3632 /**
3633 * ib_alloc_pd - Allocates an unused protection domain.
3634 * @device: The device on which to allocate the protection domain.
3635 * @flags: protection domain flags
3636 *
3637 * A protection domain object provides an association between QPs, shared
3638 * receive queues, address handles, memory regions, and memory windows.
3639 *
3640 * Every PD has a local_dma_lkey which can be used as the lkey value for local
3641 * memory operations.
3642 */
3643 #define ib_alloc_pd(device, flags) \
3644 __ib_alloc_pd((device), (flags), KBUILD_MODNAME)
3645
3646 int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata);
3647
3648 /**
3649 * ib_dealloc_pd - Deallocate kernel PD
3650 * @pd: The protection domain
3651 *
3652 * NOTE: for user PD use ib_dealloc_pd_user with valid udata!
3653 */
ib_dealloc_pd(struct ib_pd * pd)3654 static inline void ib_dealloc_pd(struct ib_pd *pd)
3655 {
3656 int ret = ib_dealloc_pd_user(pd, NULL);
3657
3658 WARN_ONCE(ret, "Destroy of kernel PD shouldn't fail");
3659 }
3660
3661 enum rdma_create_ah_flags {
3662 /* In a sleepable context */
3663 RDMA_CREATE_AH_SLEEPABLE = BIT(0),
3664 };
3665
3666 /**
3667 * rdma_create_ah - Creates an address handle for the given address vector.
3668 * @pd: The protection domain associated with the address handle.
3669 * @ah_attr: The attributes of the address vector.
3670 * @flags: Create address handle flags (see enum rdma_create_ah_flags).
3671 *
3672 * The address handle is used to reference a local or global destination
3673 * in all UD QP post sends.
3674 */
3675 struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
3676 u32 flags);
3677
3678 /**
3679 * rdma_create_user_ah - Creates an address handle for the given address vector.
3680 * It resolves destination mac address for ah attribute of RoCE type.
3681 * @pd: The protection domain associated with the address handle.
3682 * @ah_attr: The attributes of the address vector.
3683 * @udata: pointer to user's input output buffer information need by
3684 * provider driver.
3685 *
3686 * It returns 0 on success and returns appropriate error code on error.
3687 * The address handle is used to reference a local or global destination
3688 * in all UD QP post sends.
3689 */
3690 struct ib_ah *rdma_create_user_ah(struct ib_pd *pd,
3691 struct rdma_ah_attr *ah_attr,
3692 struct ib_udata *udata);
3693 /**
3694 * ib_get_gids_from_rdma_hdr - Get sgid and dgid from GRH or IPv4 header
3695 * work completion.
3696 * @hdr: the L3 header to parse
3697 * @net_type: type of header to parse
3698 * @sgid: place to store source gid
3699 * @dgid: place to store destination gid
3700 */
3701 int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,
3702 enum rdma_network_type net_type,
3703 union ib_gid *sgid, union ib_gid *dgid);
3704
3705 /**
3706 * ib_get_rdma_header_version - Get the header version
3707 * @hdr: the L3 header to parse
3708 */
3709 int ib_get_rdma_header_version(const union rdma_network_hdr *hdr);
3710
3711 /**
3712 * ib_init_ah_attr_from_wc - Initializes address handle attributes from a
3713 * work completion.
3714 * @device: Device on which the received message arrived.
3715 * @port_num: Port on which the received message arrived.
3716 * @wc: Work completion associated with the received message.
3717 * @grh: References the received global route header. This parameter is
3718 * ignored unless the work completion indicates that the GRH is valid.
3719 * @ah_attr: Returned attributes that can be used when creating an address
3720 * handle for replying to the message.
3721 * When ib_init_ah_attr_from_wc() returns success,
3722 * (a) for IB link layer it optionally contains a reference to SGID attribute
3723 * when GRH is present for IB link layer.
3724 * (b) for RoCE link layer it contains a reference to SGID attribute.
3725 * User must invoke rdma_cleanup_ah_attr_gid_attr() to release reference to SGID
3726 * attributes which are initialized using ib_init_ah_attr_from_wc().
3727 *
3728 */
3729 int ib_init_ah_attr_from_wc(struct ib_device *device, u32 port_num,
3730 const struct ib_wc *wc, const struct ib_grh *grh,
3731 struct rdma_ah_attr *ah_attr);
3732
3733 /**
3734 * ib_create_ah_from_wc - Creates an address handle associated with the
3735 * sender of the specified work completion.
3736 * @pd: The protection domain associated with the address handle.
3737 * @wc: Work completion information associated with a received message.
3738 * @grh: References the received global route header. This parameter is
3739 * ignored unless the work completion indicates that the GRH is valid.
3740 * @port_num: The outbound port number to associate with the address.
3741 *
3742 * The address handle is used to reference a local or global destination
3743 * in all UD QP post sends.
3744 */
3745 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
3746 const struct ib_grh *grh, u32 port_num);
3747
3748 /**
3749 * rdma_modify_ah - Modifies the address vector associated with an address
3750 * handle.
3751 * @ah: The address handle to modify.
3752 * @ah_attr: The new address vector attributes to associate with the
3753 * address handle.
3754 */
3755 int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);
3756
3757 /**
3758 * rdma_query_ah - Queries the address vector associated with an address
3759 * handle.
3760 * @ah: The address handle to query.
3761 * @ah_attr: The address vector attributes associated with the address
3762 * handle.
3763 */
3764 int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);
3765
3766 enum rdma_destroy_ah_flags {
3767 /* In a sleepable context */
3768 RDMA_DESTROY_AH_SLEEPABLE = BIT(0),
3769 };
3770
3771 /**
3772 * rdma_destroy_ah_user - Destroys an address handle.
3773 * @ah: The address handle to destroy.
3774 * @flags: Destroy address handle flags (see enum rdma_destroy_ah_flags).
3775 * @udata: Valid user data or NULL for kernel objects
3776 */
3777 int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata);
3778
3779 /**
3780 * rdma_destroy_ah - Destroys an kernel address handle.
3781 * @ah: The address handle to destroy.
3782 * @flags: Destroy address handle flags (see enum rdma_destroy_ah_flags).
3783 *
3784 * NOTE: for user ah use rdma_destroy_ah_user with valid udata!
3785 */
rdma_destroy_ah(struct ib_ah * ah,u32 flags)3786 static inline void rdma_destroy_ah(struct ib_ah *ah, u32 flags)
3787 {
3788 int ret = rdma_destroy_ah_user(ah, flags, NULL);
3789
3790 WARN_ONCE(ret, "Destroy of kernel AH shouldn't fail");
3791 }
3792
3793 struct ib_srq *ib_create_srq_user(struct ib_pd *pd,
3794 struct ib_srq_init_attr *srq_init_attr,
3795 struct ib_usrq_object *uobject,
3796 struct ib_udata *udata);
3797 static inline struct ib_srq *
ib_create_srq(struct ib_pd * pd,struct ib_srq_init_attr * srq_init_attr)3798 ib_create_srq(struct ib_pd *pd, struct ib_srq_init_attr *srq_init_attr)
3799 {
3800 if (!pd->device->ops.create_srq)
3801 return ERR_PTR(-EOPNOTSUPP);
3802
3803 return ib_create_srq_user(pd, srq_init_attr, NULL, NULL);
3804 }
3805
3806 /**
3807 * ib_modify_srq - Modifies the attributes for the specified SRQ.
3808 * @srq: The SRQ to modify.
3809 * @srq_attr: On input, specifies the SRQ attributes to modify. On output,
3810 * the current values of selected SRQ attributes are returned.
3811 * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ
3812 * are being modified.
3813 *
3814 * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or
3815 * IB_SRQ_LIMIT to set the SRQ's limit and request notification when
3816 * the number of receives queued drops below the limit.
3817 */
3818 int ib_modify_srq(struct ib_srq *srq,
3819 struct ib_srq_attr *srq_attr,
3820 enum ib_srq_attr_mask srq_attr_mask);
3821
3822 /**
3823 * ib_query_srq - Returns the attribute list and current values for the
3824 * specified SRQ.
3825 * @srq: The SRQ to query.
3826 * @srq_attr: The attributes of the specified SRQ.
3827 */
3828 int ib_query_srq(struct ib_srq *srq,
3829 struct ib_srq_attr *srq_attr);
3830
3831 /**
3832 * ib_destroy_srq_user - Destroys the specified SRQ.
3833 * @srq: The SRQ to destroy.
3834 * @udata: Valid user data or NULL for kernel objects
3835 */
3836 int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata);
3837
3838 /**
3839 * ib_destroy_srq - Destroys the specified kernel SRQ.
3840 * @srq: The SRQ to destroy.
3841 *
3842 * NOTE: for user srq use ib_destroy_srq_user with valid udata!
3843 */
ib_destroy_srq(struct ib_srq * srq)3844 static inline void ib_destroy_srq(struct ib_srq *srq)
3845 {
3846 int ret = ib_destroy_srq_user(srq, NULL);
3847
3848 WARN_ONCE(ret, "Destroy of kernel SRQ shouldn't fail");
3849 }
3850
3851 /**
3852 * ib_post_srq_recv - Posts a list of work requests to the specified SRQ.
3853 * @srq: The SRQ to post the work request on.
3854 * @recv_wr: A list of work requests to post on the receive queue.
3855 * @bad_recv_wr: On an immediate failure, this parameter will reference
3856 * the work request that failed to be posted on the QP.
3857 */
ib_post_srq_recv(struct ib_srq * srq,const struct ib_recv_wr * recv_wr,const struct ib_recv_wr ** bad_recv_wr)3858 static inline int ib_post_srq_recv(struct ib_srq *srq,
3859 const struct ib_recv_wr *recv_wr,
3860 const struct ib_recv_wr **bad_recv_wr)
3861 {
3862 const struct ib_recv_wr *dummy;
3863
3864 return srq->device->ops.post_srq_recv(srq, recv_wr,
3865 bad_recv_wr ? : &dummy);
3866 }
3867
3868 struct ib_qp *ib_create_qp_kernel(struct ib_pd *pd,
3869 struct ib_qp_init_attr *qp_init_attr,
3870 const char *caller);
3871 /**
3872 * ib_create_qp - Creates a kernel QP associated with the specific protection
3873 * domain.
3874 * @pd: The protection domain associated with the QP.
3875 * @init_attr: A list of initial attributes required to create the
3876 * QP. If QP creation succeeds, then the attributes are updated to
3877 * the actual capabilities of the created QP.
3878 */
ib_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * init_attr)3879 static inline struct ib_qp *ib_create_qp(struct ib_pd *pd,
3880 struct ib_qp_init_attr *init_attr)
3881 {
3882 return ib_create_qp_kernel(pd, init_attr, KBUILD_MODNAME);
3883 }
3884
3885 /**
3886 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP.
3887 * @qp: The QP to modify.
3888 * @attr: On input, specifies the QP attributes to modify. On output,
3889 * the current values of selected QP attributes are returned.
3890 * @attr_mask: A bit-mask used to specify which attributes of the QP
3891 * are being modified.
3892 * @udata: pointer to user's input output buffer information
3893 * are being modified.
3894 * It returns 0 on success and returns appropriate error code on error.
3895 */
3896 int ib_modify_qp_with_udata(struct ib_qp *qp,
3897 struct ib_qp_attr *attr,
3898 int attr_mask,
3899 struct ib_udata *udata);
3900
3901 /**
3902 * ib_modify_qp - Modifies the attributes for the specified QP and then
3903 * transitions the QP to the given state.
3904 * @qp: The QP to modify.
3905 * @qp_attr: On input, specifies the QP attributes to modify. On output,
3906 * the current values of selected QP attributes are returned.
3907 * @qp_attr_mask: A bit-mask used to specify which attributes of the QP
3908 * are being modified.
3909 */
3910 int ib_modify_qp(struct ib_qp *qp,
3911 struct ib_qp_attr *qp_attr,
3912 int qp_attr_mask);
3913
3914 /**
3915 * ib_query_qp - Returns the attribute list and current values for the
3916 * specified QP.
3917 * @qp: The QP to query.
3918 * @qp_attr: The attributes of the specified QP.
3919 * @qp_attr_mask: A bit-mask used to select specific attributes to query.
3920 * @qp_init_attr: Additional attributes of the selected QP.
3921 *
3922 * The qp_attr_mask may be used to limit the query to gathering only the
3923 * selected attributes.
3924 */
3925 int ib_query_qp(struct ib_qp *qp,
3926 struct ib_qp_attr *qp_attr,
3927 int qp_attr_mask,
3928 struct ib_qp_init_attr *qp_init_attr);
3929
3930 /**
3931 * ib_destroy_qp - Destroys the specified QP.
3932 * @qp: The QP to destroy.
3933 * @udata: Valid udata or NULL for kernel objects
3934 */
3935 int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata);
3936
3937 /**
3938 * ib_destroy_qp - Destroys the specified kernel QP.
3939 * @qp: The QP to destroy.
3940 *
3941 * NOTE: for user qp use ib_destroy_qp_user with valid udata!
3942 */
ib_destroy_qp(struct ib_qp * qp)3943 static inline int ib_destroy_qp(struct ib_qp *qp)
3944 {
3945 return ib_destroy_qp_user(qp, NULL);
3946 }
3947
3948 /**
3949 * ib_open_qp - Obtain a reference to an existing sharable QP.
3950 * @xrcd: XRC domain
3951 * @qp_open_attr: Attributes identifying the QP to open.
3952 *
3953 * Returns a reference to a sharable QP.
3954 */
3955 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
3956 struct ib_qp_open_attr *qp_open_attr);
3957
3958 /**
3959 * ib_close_qp - Release an external reference to a QP.
3960 * @qp: The QP handle to release
3961 *
3962 * The opened QP handle is released by the caller. The underlying
3963 * shared QP is not destroyed until all internal references are released.
3964 */
3965 int ib_close_qp(struct ib_qp *qp);
3966
3967 /**
3968 * ib_post_send - Posts a list of work requests to the send queue of
3969 * the specified QP.
3970 * @qp: The QP to post the work request on.
3971 * @send_wr: A list of work requests to post on the send queue.
3972 * @bad_send_wr: On an immediate failure, this parameter will reference
3973 * the work request that failed to be posted on the QP.
3974 *
3975 * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate
3976 * error is returned, the QP state shall not be affected,
3977 * ib_post_send() will return an immediate error after queueing any
3978 * earlier work requests in the list.
3979 */
ib_post_send(struct ib_qp * qp,const struct ib_send_wr * send_wr,const struct ib_send_wr ** bad_send_wr)3980 static inline int ib_post_send(struct ib_qp *qp,
3981 const struct ib_send_wr *send_wr,
3982 const struct ib_send_wr **bad_send_wr)
3983 {
3984 const struct ib_send_wr *dummy;
3985
3986 return qp->device->ops.post_send(qp, send_wr, bad_send_wr ? : &dummy);
3987 }
3988
3989 /**
3990 * ib_post_recv - Posts a list of work requests to the receive queue of
3991 * the specified QP.
3992 * @qp: The QP to post the work request on.
3993 * @recv_wr: A list of work requests to post on the receive queue.
3994 * @bad_recv_wr: On an immediate failure, this parameter will reference
3995 * the work request that failed to be posted on the QP.
3996 */
ib_post_recv(struct ib_qp * qp,const struct ib_recv_wr * recv_wr,const struct ib_recv_wr ** bad_recv_wr)3997 static inline int ib_post_recv(struct ib_qp *qp,
3998 const struct ib_recv_wr *recv_wr,
3999 const struct ib_recv_wr **bad_recv_wr)
4000 {
4001 const struct ib_recv_wr *dummy;
4002
4003 return qp->device->ops.post_recv(qp, recv_wr, bad_recv_wr ? : &dummy);
4004 }
4005
4006 struct ib_cq *__ib_alloc_cq(struct ib_device *dev, void *private, int nr_cqe,
4007 int comp_vector, enum ib_poll_context poll_ctx,
4008 const char *caller);
ib_alloc_cq(struct ib_device * dev,void * private,int nr_cqe,int comp_vector,enum ib_poll_context poll_ctx)4009 static inline struct ib_cq *ib_alloc_cq(struct ib_device *dev, void *private,
4010 int nr_cqe, int comp_vector,
4011 enum ib_poll_context poll_ctx)
4012 {
4013 return __ib_alloc_cq(dev, private, nr_cqe, comp_vector, poll_ctx,
4014 KBUILD_MODNAME);
4015 }
4016
4017 struct ib_cq *__ib_alloc_cq_any(struct ib_device *dev, void *private,
4018 int nr_cqe, enum ib_poll_context poll_ctx,
4019 const char *caller);
4020
4021 /**
4022 * ib_alloc_cq_any: Allocate kernel CQ
4023 * @dev: The IB device
4024 * @private: Private data attached to the CQE
4025 * @nr_cqe: Number of CQEs in the CQ
4026 * @poll_ctx: Context used for polling the CQ
4027 */
ib_alloc_cq_any(struct ib_device * dev,void * private,int nr_cqe,enum ib_poll_context poll_ctx)4028 static inline struct ib_cq *ib_alloc_cq_any(struct ib_device *dev,
4029 void *private, int nr_cqe,
4030 enum ib_poll_context poll_ctx)
4031 {
4032 return __ib_alloc_cq_any(dev, private, nr_cqe, poll_ctx,
4033 KBUILD_MODNAME);
4034 }
4035
4036 void ib_free_cq(struct ib_cq *cq);
4037 int ib_process_cq_direct(struct ib_cq *cq, int budget);
4038
4039 /**
4040 * ib_create_cq - Creates a CQ on the specified device.
4041 * @device: The device on which to create the CQ.
4042 * @comp_handler: A user-specified callback that is invoked when a
4043 * completion event occurs on the CQ.
4044 * @event_handler: A user-specified callback that is invoked when an
4045 * asynchronous event not associated with a completion occurs on the CQ.
4046 * @cq_context: Context associated with the CQ returned to the user via
4047 * the associated completion and event handlers.
4048 * @cq_attr: The attributes the CQ should be created upon.
4049 *
4050 * Users can examine the cq structure to determine the actual CQ size.
4051 */
4052 struct ib_cq *__ib_create_cq(struct ib_device *device,
4053 ib_comp_handler comp_handler,
4054 void (*event_handler)(struct ib_event *, void *),
4055 void *cq_context,
4056 const struct ib_cq_init_attr *cq_attr,
4057 const char *caller);
4058 #define ib_create_cq(device, cmp_hndlr, evt_hndlr, cq_ctxt, cq_attr) \
4059 __ib_create_cq((device), (cmp_hndlr), (evt_hndlr), (cq_ctxt), (cq_attr), KBUILD_MODNAME)
4060
4061 /**
4062 * ib_resize_cq - Modifies the capacity of the CQ.
4063 * @cq: The CQ to resize.
4064 * @cqe: The minimum size of the CQ.
4065 *
4066 * Users can examine the cq structure to determine the actual CQ size.
4067 */
4068 int ib_resize_cq(struct ib_cq *cq, int cqe);
4069
4070 /**
4071 * rdma_set_cq_moderation - Modifies moderation params of the CQ
4072 * @cq: The CQ to modify.
4073 * @cq_count: number of CQEs that will trigger an event
4074 * @cq_period: max period of time in usec before triggering an event
4075 *
4076 */
4077 int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period);
4078
4079 /**
4080 * ib_destroy_cq_user - Destroys the specified CQ.
4081 * @cq: The CQ to destroy.
4082 * @udata: Valid user data or NULL for kernel objects
4083 */
4084 int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata);
4085
4086 /**
4087 * ib_destroy_cq - Destroys the specified kernel CQ.
4088 * @cq: The CQ to destroy.
4089 *
4090 * NOTE: for user cq use ib_destroy_cq_user with valid udata!
4091 */
ib_destroy_cq(struct ib_cq * cq)4092 static inline void ib_destroy_cq(struct ib_cq *cq)
4093 {
4094 int ret = ib_destroy_cq_user(cq, NULL);
4095
4096 WARN_ONCE(ret, "Destroy of kernel CQ shouldn't fail");
4097 }
4098
4099 /**
4100 * ib_poll_cq - poll a CQ for completion(s)
4101 * @cq:the CQ being polled
4102 * @num_entries:maximum number of completions to return
4103 * @wc:array of at least @num_entries &struct ib_wc where completions
4104 * will be returned
4105 *
4106 * Poll a CQ for (possibly multiple) completions. If the return value
4107 * is < 0, an error occurred. If the return value is >= 0, it is the
4108 * number of completions returned. If the return value is
4109 * non-negative and < num_entries, then the CQ was emptied.
4110 */
ib_poll_cq(struct ib_cq * cq,int num_entries,struct ib_wc * wc)4111 static inline int ib_poll_cq(struct ib_cq *cq, int num_entries,
4112 struct ib_wc *wc)
4113 {
4114 return cq->device->ops.poll_cq(cq, num_entries, wc);
4115 }
4116
4117 /**
4118 * ib_req_notify_cq - Request completion notification on a CQ.
4119 * @cq: The CQ to generate an event for.
4120 * @flags:
4121 * Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP
4122 * to request an event on the next solicited event or next work
4123 * completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS
4124 * may also be |ed in to request a hint about missed events, as
4125 * described below.
4126 *
4127 * Return Value:
4128 * < 0 means an error occurred while requesting notification
4129 * == 0 means notification was requested successfully, and if
4130 * IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events
4131 * were missed and it is safe to wait for another event. In
4132 * this case is it guaranteed that any work completions added
4133 * to the CQ since the last CQ poll will trigger a completion
4134 * notification event.
4135 * > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed
4136 * in. It means that the consumer must poll the CQ again to
4137 * make sure it is empty to avoid missing an event because of a
4138 * race between requesting notification and an entry being
4139 * added to the CQ. This return value means it is possible
4140 * (but not guaranteed) that a work completion has been added
4141 * to the CQ since the last poll without triggering a
4142 * completion notification event.
4143 */
ib_req_notify_cq(struct ib_cq * cq,enum ib_cq_notify_flags flags)4144 static inline int ib_req_notify_cq(struct ib_cq *cq,
4145 enum ib_cq_notify_flags flags)
4146 {
4147 return cq->device->ops.req_notify_cq(cq, flags);
4148 }
4149
4150 struct ib_cq *ib_cq_pool_get(struct ib_device *dev, unsigned int nr_cqe,
4151 int comp_vector_hint,
4152 enum ib_poll_context poll_ctx);
4153
4154 void ib_cq_pool_put(struct ib_cq *cq, unsigned int nr_cqe);
4155
4156 /*
4157 * Drivers that don't need a DMA mapping at the RDMA layer, set dma_device to
4158 * NULL. This causes the ib_dma* helpers to just stash the kernel virtual
4159 * address into the dma address.
4160 */
ib_uses_virt_dma(struct ib_device * dev)4161 static inline bool ib_uses_virt_dma(struct ib_device *dev)
4162 {
4163 return IS_ENABLED(CONFIG_INFINIBAND_VIRT_DMA) && !dev->dma_device;
4164 }
4165
4166 /*
4167 * Check if a IB device's underlying DMA mapping supports P2PDMA transfers.
4168 */
ib_dma_pci_p2p_dma_supported(struct ib_device * dev)4169 static inline bool ib_dma_pci_p2p_dma_supported(struct ib_device *dev)
4170 {
4171 if (ib_uses_virt_dma(dev))
4172 return false;
4173
4174 return dma_pci_p2pdma_supported(dev->dma_device);
4175 }
4176
4177 /**
4178 * ib_virt_dma_to_ptr - Convert a dma_addr to a kernel pointer
4179 * @dma_addr: The DMA address
4180 *
4181 * Used by ib_uses_virt_dma() devices to get back to the kernel pointer after
4182 * going through the dma_addr marshalling.
4183 */
ib_virt_dma_to_ptr(u64 dma_addr)4184 static inline void *ib_virt_dma_to_ptr(u64 dma_addr)
4185 {
4186 /* virt_dma mode maps the kvs's directly into the dma addr */
4187 return (void *)(uintptr_t)dma_addr;
4188 }
4189
4190 /**
4191 * ib_virt_dma_to_page - Convert a dma_addr to a struct page
4192 * @dma_addr: The DMA address
4193 *
4194 * Used by ib_uses_virt_dma() device to get back to the struct page after going
4195 * through the dma_addr marshalling.
4196 */
ib_virt_dma_to_page(u64 dma_addr)4197 static inline struct page *ib_virt_dma_to_page(u64 dma_addr)
4198 {
4199 return virt_to_page(ib_virt_dma_to_ptr(dma_addr));
4200 }
4201
4202 /**
4203 * ib_dma_mapping_error - check a DMA addr for error
4204 * @dev: The device for which the dma_addr was created
4205 * @dma_addr: The DMA address to check
4206 */
ib_dma_mapping_error(struct ib_device * dev,u64 dma_addr)4207 static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
4208 {
4209 if (ib_uses_virt_dma(dev))
4210 return 0;
4211 return dma_mapping_error(dev->dma_device, dma_addr);
4212 }
4213
4214 /**
4215 * ib_dma_map_single - Map a kernel virtual address to DMA address
4216 * @dev: The device for which the dma_addr is to be created
4217 * @cpu_addr: The kernel virtual address
4218 * @size: The size of the region in bytes
4219 * @direction: The direction of the DMA
4220 */
ib_dma_map_single(struct ib_device * dev,void * cpu_addr,size_t size,enum dma_data_direction direction)4221 static inline u64 ib_dma_map_single(struct ib_device *dev,
4222 void *cpu_addr, size_t size,
4223 enum dma_data_direction direction)
4224 {
4225 if (ib_uses_virt_dma(dev))
4226 return (uintptr_t)cpu_addr;
4227 return dma_map_single(dev->dma_device, cpu_addr, size, direction);
4228 }
4229
4230 /**
4231 * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single()
4232 * @dev: The device for which the DMA address was created
4233 * @addr: The DMA address
4234 * @size: The size of the region in bytes
4235 * @direction: The direction of the DMA
4236 */
ib_dma_unmap_single(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction direction)4237 static inline void ib_dma_unmap_single(struct ib_device *dev,
4238 u64 addr, size_t size,
4239 enum dma_data_direction direction)
4240 {
4241 if (!ib_uses_virt_dma(dev))
4242 dma_unmap_single(dev->dma_device, addr, size, direction);
4243 }
4244
4245 /**
4246 * ib_dma_map_page - Map a physical page to DMA address
4247 * @dev: The device for which the dma_addr is to be created
4248 * @page: The page to be mapped
4249 * @offset: The offset within the page
4250 * @size: The size of the region in bytes
4251 * @direction: The direction of the DMA
4252 */
ib_dma_map_page(struct ib_device * dev,struct page * page,unsigned long offset,size_t size,enum dma_data_direction direction)4253 static inline u64 ib_dma_map_page(struct ib_device *dev,
4254 struct page *page,
4255 unsigned long offset,
4256 size_t size,
4257 enum dma_data_direction direction)
4258 {
4259 if (ib_uses_virt_dma(dev))
4260 return (uintptr_t)(page_address(page) + offset);
4261 return dma_map_page(dev->dma_device, page, offset, size, direction);
4262 }
4263
4264 /**
4265 * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page()
4266 * @dev: The device for which the DMA address was created
4267 * @addr: The DMA address
4268 * @size: The size of the region in bytes
4269 * @direction: The direction of the DMA
4270 */
ib_dma_unmap_page(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction direction)4271 static inline void ib_dma_unmap_page(struct ib_device *dev,
4272 u64 addr, size_t size,
4273 enum dma_data_direction direction)
4274 {
4275 if (!ib_uses_virt_dma(dev))
4276 dma_unmap_page(dev->dma_device, addr, size, direction);
4277 }
4278
4279 /**
4280 * ib_dma_map_bvec - Map a bio_vec to DMA address
4281 * @dev: The device for which the dma_addr is to be created
4282 * @bvec: The bio_vec to map
4283 * @direction: The direction of the DMA
4284 *
4285 * Returns a DMA address for the bio_vec. The caller must check the
4286 * result with ib_dma_mapping_error() before use; a failed mapping
4287 * must not be passed to ib_dma_unmap_bvec().
4288 *
4289 * For software RDMA devices (rxe, siw), returns a virtual address
4290 * and no actual DMA mapping occurs.
4291 */
ib_dma_map_bvec(struct ib_device * dev,struct bio_vec * bvec,enum dma_data_direction direction)4292 static inline u64 ib_dma_map_bvec(struct ib_device *dev,
4293 struct bio_vec *bvec,
4294 enum dma_data_direction direction)
4295 {
4296 if (ib_uses_virt_dma(dev))
4297 return (uintptr_t)bvec_virt(bvec);
4298 return dma_map_phys(dev->dma_device, bvec_phys(bvec),
4299 bvec->bv_len, direction, 0);
4300 }
4301
4302 /**
4303 * ib_dma_unmap_bvec - Unmap a bio_vec DMA mapping
4304 * @dev: The device for which the DMA address was created
4305 * @addr: The DMA address returned by ib_dma_map_bvec()
4306 * @size: The size of the region in bytes
4307 * @direction: The direction of the DMA
4308 *
4309 * Releases a DMA mapping created by ib_dma_map_bvec(). For software
4310 * RDMA devices this is a no-op since no actual mapping occurred.
4311 */
ib_dma_unmap_bvec(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction direction)4312 static inline void ib_dma_unmap_bvec(struct ib_device *dev,
4313 u64 addr, size_t size,
4314 enum dma_data_direction direction)
4315 {
4316 if (!ib_uses_virt_dma(dev))
4317 dma_unmap_phys(dev->dma_device, addr, size, direction, 0);
4318 }
4319
4320 int ib_dma_virt_map_sg(struct ib_device *dev, struct scatterlist *sg, int nents);
ib_dma_map_sg_attrs(struct ib_device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,unsigned long dma_attrs)4321 static inline int ib_dma_map_sg_attrs(struct ib_device *dev,
4322 struct scatterlist *sg, int nents,
4323 enum dma_data_direction direction,
4324 unsigned long dma_attrs)
4325 {
4326 if (ib_uses_virt_dma(dev))
4327 return ib_dma_virt_map_sg(dev, sg, nents);
4328 return dma_map_sg_attrs(dev->dma_device, sg, nents, direction,
4329 dma_attrs);
4330 }
4331
ib_dma_unmap_sg_attrs(struct ib_device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,unsigned long dma_attrs)4332 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
4333 struct scatterlist *sg, int nents,
4334 enum dma_data_direction direction,
4335 unsigned long dma_attrs)
4336 {
4337 if (!ib_uses_virt_dma(dev))
4338 dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction,
4339 dma_attrs);
4340 }
4341
4342 /**
4343 * ib_dma_map_sgtable_attrs - Map a scatter/gather table to DMA addresses
4344 * @dev: The device for which the DMA addresses are to be created
4345 * @sgt: The sg_table object describing the buffer
4346 * @direction: The direction of the DMA
4347 * @dma_attrs: Optional DMA attributes for the map operation
4348 */
ib_dma_map_sgtable_attrs(struct ib_device * dev,struct sg_table * sgt,enum dma_data_direction direction,unsigned long dma_attrs)4349 static inline int ib_dma_map_sgtable_attrs(struct ib_device *dev,
4350 struct sg_table *sgt,
4351 enum dma_data_direction direction,
4352 unsigned long dma_attrs)
4353 {
4354 int nents;
4355
4356 if (ib_uses_virt_dma(dev)) {
4357 nents = ib_dma_virt_map_sg(dev, sgt->sgl, sgt->orig_nents);
4358 if (!nents)
4359 return -EIO;
4360 sgt->nents = nents;
4361 return 0;
4362 }
4363 return dma_map_sgtable(dev->dma_device, sgt, direction, dma_attrs);
4364 }
4365
ib_dma_unmap_sgtable_attrs(struct ib_device * dev,struct sg_table * sgt,enum dma_data_direction direction,unsigned long dma_attrs)4366 static inline void ib_dma_unmap_sgtable_attrs(struct ib_device *dev,
4367 struct sg_table *sgt,
4368 enum dma_data_direction direction,
4369 unsigned long dma_attrs)
4370 {
4371 if (!ib_uses_virt_dma(dev))
4372 dma_unmap_sgtable(dev->dma_device, sgt, direction, dma_attrs);
4373 }
4374
4375 /**
4376 * ib_dma_map_sg - Map a scatter/gather list to DMA addresses
4377 * @dev: The device for which the DMA addresses are to be created
4378 * @sg: The array of scatter/gather entries
4379 * @nents: The number of scatter/gather entries
4380 * @direction: The direction of the DMA
4381 */
ib_dma_map_sg(struct ib_device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction)4382 static inline int ib_dma_map_sg(struct ib_device *dev,
4383 struct scatterlist *sg, int nents,
4384 enum dma_data_direction direction)
4385 {
4386 return ib_dma_map_sg_attrs(dev, sg, nents, direction, 0);
4387 }
4388
4389 /**
4390 * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses
4391 * @dev: The device for which the DMA addresses were created
4392 * @sg: The array of scatter/gather entries
4393 * @nents: The number of scatter/gather entries
4394 * @direction: The direction of the DMA
4395 */
ib_dma_unmap_sg(struct ib_device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction)4396 static inline void ib_dma_unmap_sg(struct ib_device *dev,
4397 struct scatterlist *sg, int nents,
4398 enum dma_data_direction direction)
4399 {
4400 ib_dma_unmap_sg_attrs(dev, sg, nents, direction, 0);
4401 }
4402
4403 /**
4404 * ib_dma_max_seg_size - Return the size limit of a single DMA transfer
4405 * @dev: The device to query
4406 *
4407 * The returned value represents a size in bytes.
4408 */
ib_dma_max_seg_size(struct ib_device * dev)4409 static inline unsigned int ib_dma_max_seg_size(struct ib_device *dev)
4410 {
4411 if (ib_uses_virt_dma(dev))
4412 return UINT_MAX;
4413 return dma_get_max_seg_size(dev->dma_device);
4414 }
4415
4416 /**
4417 * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU
4418 * @dev: The device for which the DMA address was created
4419 * @addr: The DMA address
4420 * @size: The size of the region in bytes
4421 * @dir: The direction of the DMA
4422 */
ib_dma_sync_single_for_cpu(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction dir)4423 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev,
4424 u64 addr,
4425 size_t size,
4426 enum dma_data_direction dir)
4427 {
4428 if (!ib_uses_virt_dma(dev))
4429 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
4430 }
4431
4432 /**
4433 * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device
4434 * @dev: The device for which the DMA address was created
4435 * @addr: The DMA address
4436 * @size: The size of the region in bytes
4437 * @dir: The direction of the DMA
4438 */
ib_dma_sync_single_for_device(struct ib_device * dev,u64 addr,size_t size,enum dma_data_direction dir)4439 static inline void ib_dma_sync_single_for_device(struct ib_device *dev,
4440 u64 addr,
4441 size_t size,
4442 enum dma_data_direction dir)
4443 {
4444 if (!ib_uses_virt_dma(dev))
4445 dma_sync_single_for_device(dev->dma_device, addr, size, dir);
4446 }
4447
4448 /* ib_reg_user_mr - register a memory region for virtual addresses from kernel
4449 * space. This function should be called when 'current' is the owning MM.
4450 */
4451 struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
4452 u64 virt_addr, int mr_access_flags);
4453
4454 /* ib_advise_mr - give an advice about an address range in a memory region */
4455 int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice,
4456 u32 flags, struct ib_sge *sg_list, u32 num_sge);
4457 /**
4458 * ib_dereg_mr_user - Deregisters a memory region and removes it from the
4459 * HCA translation table.
4460 * @mr: The memory region to deregister.
4461 * @udata: Valid user data or NULL for kernel object
4462 *
4463 * This function can fail, if the memory region has memory windows bound to it.
4464 */
4465 int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata);
4466
4467 /**
4468 * ib_dereg_mr - Deregisters a kernel memory region and removes it from the
4469 * HCA translation table.
4470 * @mr: The memory region to deregister.
4471 *
4472 * This function can fail, if the memory region has memory windows bound to it.
4473 *
4474 * NOTE: for user mr use ib_dereg_mr_user with valid udata!
4475 */
ib_dereg_mr(struct ib_mr * mr)4476 static inline int ib_dereg_mr(struct ib_mr *mr)
4477 {
4478 return ib_dereg_mr_user(mr, NULL);
4479 }
4480
4481 struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
4482 u32 max_num_sg);
4483
4484 struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
4485 u32 max_num_data_sg,
4486 u32 max_num_meta_sg);
4487
4488 /**
4489 * ib_update_fast_reg_key - updates the key portion of the fast_reg MR
4490 * R_Key and L_Key.
4491 * @mr: struct ib_mr pointer to be updated.
4492 * @newkey: new key to be used.
4493 */
ib_update_fast_reg_key(struct ib_mr * mr,u8 newkey)4494 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey)
4495 {
4496 mr->lkey = (mr->lkey & 0xffffff00) | newkey;
4497 mr->rkey = (mr->rkey & 0xffffff00) | newkey;
4498 }
4499
4500 /**
4501 * ib_inc_rkey - increments the key portion of the given rkey. Can be used
4502 * for calculating a new rkey for type 2 memory windows.
4503 * @rkey: the rkey to increment.
4504 */
ib_inc_rkey(u32 rkey)4505 static inline u32 ib_inc_rkey(u32 rkey)
4506 {
4507 const u32 mask = 0x000000ff;
4508 return ((rkey + 1) & mask) | (rkey & ~mask);
4509 }
4510
4511 /**
4512 * ib_attach_mcast - Attaches the specified QP to a multicast group.
4513 * @qp: QP to attach to the multicast group. The QP must be type
4514 * IB_QPT_UD.
4515 * @gid: Multicast group GID.
4516 * @lid: Multicast group LID in host byte order.
4517 *
4518 * In order to send and receive multicast packets, subnet
4519 * administration must have created the multicast group and configured
4520 * the fabric appropriately. The port associated with the specified
4521 * QP must also be a member of the multicast group.
4522 */
4523 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
4524
4525 /**
4526 * ib_detach_mcast - Detaches the specified QP from a multicast group.
4527 * @qp: QP to detach from the multicast group.
4528 * @gid: Multicast group GID.
4529 * @lid: Multicast group LID in host byte order.
4530 */
4531 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
4532
4533 struct ib_xrcd *ib_alloc_xrcd_user(struct ib_device *device,
4534 struct inode *inode, struct ib_udata *udata);
4535 int ib_dealloc_xrcd_user(struct ib_xrcd *xrcd, struct ib_udata *udata);
4536
ib_check_mr_access(struct ib_device * ib_dev,unsigned int flags)4537 static inline int ib_check_mr_access(struct ib_device *ib_dev,
4538 unsigned int flags)
4539 {
4540 u64 device_cap = ib_dev->attrs.device_cap_flags;
4541
4542 /*
4543 * Local write permission is required if remote write or
4544 * remote atomic permission is also requested.
4545 */
4546 if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
4547 !(flags & IB_ACCESS_LOCAL_WRITE))
4548 return -EINVAL;
4549
4550 if (flags & ~IB_ACCESS_SUPPORTED)
4551 return -EINVAL;
4552
4553 if (flags & IB_ACCESS_ON_DEMAND &&
4554 !(ib_dev->attrs.kernel_cap_flags & IBK_ON_DEMAND_PAGING))
4555 return -EOPNOTSUPP;
4556
4557 if ((flags & IB_ACCESS_FLUSH_GLOBAL &&
4558 !(device_cap & IB_DEVICE_FLUSH_GLOBAL)) ||
4559 (flags & IB_ACCESS_FLUSH_PERSISTENT &&
4560 !(device_cap & IB_DEVICE_FLUSH_PERSISTENT)))
4561 return -EOPNOTSUPP;
4562
4563 return 0;
4564 }
4565
ib_access_writable(int access_flags)4566 static inline bool ib_access_writable(int access_flags)
4567 {
4568 /*
4569 * We have writable memory backing the MR if any of the following
4570 * access flags are set. "Local write" and "remote write" obviously
4571 * require write access. "Remote atomic" can do things like fetch and
4572 * add, which will modify memory, and "MW bind" can change permissions
4573 * by binding a window.
4574 */
4575 return access_flags &
4576 (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE |
4577 IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND);
4578 }
4579
4580 /**
4581 * ib_check_mr_status: lightweight check of MR status.
4582 * This routine may provide status checks on a selected
4583 * ib_mr. first use is for signature status check.
4584 *
4585 * @mr: A memory region.
4586 * @check_mask: Bitmask of which checks to perform from
4587 * ib_mr_status_check enumeration.
4588 * @mr_status: The container of relevant status checks.
4589 * failed checks will be indicated in the status bitmask
4590 * and the relevant info shall be in the error item.
4591 */
4592 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
4593 struct ib_mr_status *mr_status);
4594
4595 /**
4596 * ib_device_try_get: Hold a registration lock
4597 * @dev: The device to lock
4598 *
4599 * A device under an active registration lock cannot become unregistered. It
4600 * is only possible to obtain a registration lock on a device that is fully
4601 * registered, otherwise this function returns false.
4602 *
4603 * The registration lock is only necessary for actions which require the
4604 * device to still be registered. Uses that only require the device pointer to
4605 * be valid should use get_device(&ibdev->dev) to hold the memory.
4606 *
4607 */
ib_device_try_get(struct ib_device * dev)4608 static inline bool ib_device_try_get(struct ib_device *dev)
4609 {
4610 return refcount_inc_not_zero(&dev->refcount);
4611 }
4612
4613 void ib_device_put(struct ib_device *device);
4614 struct ib_device *ib_device_get_by_netdev(struct net_device *ndev,
4615 enum rdma_driver_id driver_id);
4616 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u32 port,
4617 u16 pkey, const union ib_gid *gid,
4618 const struct sockaddr *addr);
4619 int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev,
4620 unsigned int port);
4621 struct net_device *ib_device_get_netdev(struct ib_device *ib_dev,
4622 u32 port);
4623 int ib_query_netdev_port(struct ib_device *ibdev, struct net_device *ndev,
4624 u32 *port);
4625
ib_get_curr_port_state(struct net_device * net_dev)4626 static inline enum ib_port_state ib_get_curr_port_state(struct net_device *net_dev)
4627 {
4628 return (netif_running(net_dev) && netif_carrier_ok(net_dev)) ?
4629 IB_PORT_ACTIVE : IB_PORT_DOWN;
4630 }
4631
4632 void ib_dispatch_port_state_event(struct ib_device *ibdev,
4633 struct net_device *ndev);
4634 struct ib_wq *ib_create_wq(struct ib_pd *pd,
4635 struct ib_wq_init_attr *init_attr);
4636 int ib_destroy_wq_user(struct ib_wq *wq, struct ib_udata *udata);
4637
4638 int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
4639 unsigned int *sg_offset, unsigned int page_size);
4640 int ib_map_mr_sg_pi(struct ib_mr *mr, struct scatterlist *data_sg,
4641 int data_sg_nents, unsigned int *data_sg_offset,
4642 struct scatterlist *meta_sg, int meta_sg_nents,
4643 unsigned int *meta_sg_offset, unsigned int page_size);
4644
4645 static inline int
ib_map_mr_sg_zbva(struct ib_mr * mr,struct scatterlist * sg,int sg_nents,unsigned int * sg_offset,unsigned int page_size)4646 ib_map_mr_sg_zbva(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
4647 unsigned int *sg_offset, unsigned int page_size)
4648 {
4649 int n;
4650
4651 n = ib_map_mr_sg(mr, sg, sg_nents, sg_offset, page_size);
4652 mr->iova = 0;
4653
4654 return n;
4655 }
4656
4657 int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
4658 unsigned int *sg_offset, int (*set_page)(struct ib_mr *, u64));
4659
4660 void ib_drain_rq(struct ib_qp *qp);
4661 void ib_drain_sq(struct ib_qp *qp);
4662 void ib_drain_qp(struct ib_qp *qp);
4663
4664 int ib_get_eth_speed(struct ib_device *dev, u32 port_num, u16 *speed,
4665 u8 *width);
4666
rdma_ah_retrieve_dmac(struct rdma_ah_attr * attr)4667 static inline u8 *rdma_ah_retrieve_dmac(struct rdma_ah_attr *attr)
4668 {
4669 if (attr->type == RDMA_AH_ATTR_TYPE_ROCE)
4670 return attr->roce.dmac;
4671 return NULL;
4672 }
4673
rdma_ah_set_dlid(struct rdma_ah_attr * attr,u32 dlid)4674 static inline void rdma_ah_set_dlid(struct rdma_ah_attr *attr, u32 dlid)
4675 {
4676 if (attr->type == RDMA_AH_ATTR_TYPE_IB)
4677 attr->ib.dlid = (u16)dlid;
4678 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
4679 attr->opa.dlid = dlid;
4680 }
4681
rdma_ah_get_dlid(const struct rdma_ah_attr * attr)4682 static inline u32 rdma_ah_get_dlid(const struct rdma_ah_attr *attr)
4683 {
4684 if (attr->type == RDMA_AH_ATTR_TYPE_IB)
4685 return attr->ib.dlid;
4686 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
4687 return attr->opa.dlid;
4688 return 0;
4689 }
4690
rdma_ah_set_sl(struct rdma_ah_attr * attr,u8 sl)4691 static inline void rdma_ah_set_sl(struct rdma_ah_attr *attr, u8 sl)
4692 {
4693 attr->sl = sl;
4694 }
4695
rdma_ah_get_sl(const struct rdma_ah_attr * attr)4696 static inline u8 rdma_ah_get_sl(const struct rdma_ah_attr *attr)
4697 {
4698 return attr->sl;
4699 }
4700
rdma_ah_set_path_bits(struct rdma_ah_attr * attr,u8 src_path_bits)4701 static inline void rdma_ah_set_path_bits(struct rdma_ah_attr *attr,
4702 u8 src_path_bits)
4703 {
4704 if (attr->type == RDMA_AH_ATTR_TYPE_IB)
4705 attr->ib.src_path_bits = src_path_bits;
4706 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
4707 attr->opa.src_path_bits = src_path_bits;
4708 }
4709
rdma_ah_get_path_bits(const struct rdma_ah_attr * attr)4710 static inline u8 rdma_ah_get_path_bits(const struct rdma_ah_attr *attr)
4711 {
4712 if (attr->type == RDMA_AH_ATTR_TYPE_IB)
4713 return attr->ib.src_path_bits;
4714 else if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
4715 return attr->opa.src_path_bits;
4716 return 0;
4717 }
4718
rdma_ah_set_make_grd(struct rdma_ah_attr * attr,bool make_grd)4719 static inline void rdma_ah_set_make_grd(struct rdma_ah_attr *attr,
4720 bool make_grd)
4721 {
4722 if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
4723 attr->opa.make_grd = make_grd;
4724 }
4725
rdma_ah_get_make_grd(const struct rdma_ah_attr * attr)4726 static inline bool rdma_ah_get_make_grd(const struct rdma_ah_attr *attr)
4727 {
4728 if (attr->type == RDMA_AH_ATTR_TYPE_OPA)
4729 return attr->opa.make_grd;
4730 return false;
4731 }
4732
rdma_ah_set_port_num(struct rdma_ah_attr * attr,u32 port_num)4733 static inline void rdma_ah_set_port_num(struct rdma_ah_attr *attr, u32 port_num)
4734 {
4735 attr->port_num = port_num;
4736 }
4737
rdma_ah_get_port_num(const struct rdma_ah_attr * attr)4738 static inline u32 rdma_ah_get_port_num(const struct rdma_ah_attr *attr)
4739 {
4740 return attr->port_num;
4741 }
4742
rdma_ah_set_static_rate(struct rdma_ah_attr * attr,u8 static_rate)4743 static inline void rdma_ah_set_static_rate(struct rdma_ah_attr *attr,
4744 u8 static_rate)
4745 {
4746 attr->static_rate = static_rate;
4747 }
4748
rdma_ah_get_static_rate(const struct rdma_ah_attr * attr)4749 static inline u8 rdma_ah_get_static_rate(const struct rdma_ah_attr *attr)
4750 {
4751 return attr->static_rate;
4752 }
4753
rdma_ah_set_ah_flags(struct rdma_ah_attr * attr,enum ib_ah_flags flag)4754 static inline void rdma_ah_set_ah_flags(struct rdma_ah_attr *attr,
4755 enum ib_ah_flags flag)
4756 {
4757 attr->ah_flags = flag;
4758 }
4759
4760 static inline enum ib_ah_flags
rdma_ah_get_ah_flags(const struct rdma_ah_attr * attr)4761 rdma_ah_get_ah_flags(const struct rdma_ah_attr *attr)
4762 {
4763 return attr->ah_flags;
4764 }
4765
4766 static inline const struct ib_global_route
rdma_ah_read_grh(const struct rdma_ah_attr * attr)4767 *rdma_ah_read_grh(const struct rdma_ah_attr *attr)
4768 {
4769 return &attr->grh;
4770 }
4771
4772 /*To retrieve and modify the grh */
4773 static inline struct ib_global_route
rdma_ah_retrieve_grh(struct rdma_ah_attr * attr)4774 *rdma_ah_retrieve_grh(struct rdma_ah_attr *attr)
4775 {
4776 return &attr->grh;
4777 }
4778
rdma_ah_set_dgid_raw(struct rdma_ah_attr * attr,void * dgid)4779 static inline void rdma_ah_set_dgid_raw(struct rdma_ah_attr *attr, void *dgid)
4780 {
4781 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
4782
4783 memcpy(grh->dgid.raw, dgid, sizeof(grh->dgid));
4784 }
4785
rdma_ah_set_subnet_prefix(struct rdma_ah_attr * attr,__be64 prefix)4786 static inline void rdma_ah_set_subnet_prefix(struct rdma_ah_attr *attr,
4787 __be64 prefix)
4788 {
4789 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
4790
4791 grh->dgid.global.subnet_prefix = prefix;
4792 }
4793
rdma_ah_set_interface_id(struct rdma_ah_attr * attr,__be64 if_id)4794 static inline void rdma_ah_set_interface_id(struct rdma_ah_attr *attr,
4795 __be64 if_id)
4796 {
4797 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
4798
4799 grh->dgid.global.interface_id = if_id;
4800 }
4801
rdma_ah_set_grh(struct rdma_ah_attr * attr,union ib_gid * dgid,u32 flow_label,u8 sgid_index,u8 hop_limit,u8 traffic_class)4802 static inline void rdma_ah_set_grh(struct rdma_ah_attr *attr,
4803 union ib_gid *dgid, u32 flow_label,
4804 u8 sgid_index, u8 hop_limit,
4805 u8 traffic_class)
4806 {
4807 struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);
4808
4809 attr->ah_flags = IB_AH_GRH;
4810 if (dgid)
4811 grh->dgid = *dgid;
4812 grh->flow_label = flow_label;
4813 grh->sgid_index = sgid_index;
4814 grh->hop_limit = hop_limit;
4815 grh->traffic_class = traffic_class;
4816 grh->sgid_attr = NULL;
4817 }
4818
4819 void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr);
4820 void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid,
4821 u32 flow_label, u8 hop_limit, u8 traffic_class,
4822 const struct ib_gid_attr *sgid_attr);
4823 void rdma_copy_ah_attr(struct rdma_ah_attr *dest,
4824 const struct rdma_ah_attr *src);
4825 void rdma_replace_ah_attr(struct rdma_ah_attr *old,
4826 const struct rdma_ah_attr *new);
4827 void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src);
4828
4829 /**
4830 * rdma_ah_find_type - Return address handle type.
4831 *
4832 * @dev: Device to be checked
4833 * @port_num: Port number
4834 */
rdma_ah_find_type(struct ib_device * dev,u32 port_num)4835 static inline enum rdma_ah_attr_type rdma_ah_find_type(struct ib_device *dev,
4836 u32 port_num)
4837 {
4838 if (rdma_protocol_roce(dev, port_num))
4839 return RDMA_AH_ATTR_TYPE_ROCE;
4840 if (rdma_protocol_ib(dev, port_num)) {
4841 if (rdma_cap_opa_ah(dev, port_num))
4842 return RDMA_AH_ATTR_TYPE_OPA;
4843 return RDMA_AH_ATTR_TYPE_IB;
4844 }
4845 if (dev->type == RDMA_DEVICE_TYPE_SMI)
4846 return RDMA_AH_ATTR_TYPE_IB;
4847
4848 return RDMA_AH_ATTR_TYPE_UNDEFINED;
4849 }
4850
4851 /**
4852 * ib_lid_cpu16 - Return lid in 16bit CPU encoding.
4853 * In the current implementation the only way to
4854 * get the 32bit lid is from other sources for OPA.
4855 * For IB, lids will always be 16bits so cast the
4856 * value accordingly.
4857 *
4858 * @lid: A 32bit LID
4859 */
ib_lid_cpu16(u32 lid)4860 static inline u16 ib_lid_cpu16(u32 lid)
4861 {
4862 WARN_ON_ONCE(lid & 0xFFFF0000);
4863 return (u16)lid;
4864 }
4865
4866 /**
4867 * ib_lid_be16 - Return lid in 16bit BE encoding.
4868 *
4869 * @lid: A 32bit LID
4870 */
ib_lid_be16(u32 lid)4871 static inline __be16 ib_lid_be16(u32 lid)
4872 {
4873 WARN_ON_ONCE(lid & 0xFFFF0000);
4874 return cpu_to_be16((u16)lid);
4875 }
4876
4877 /**
4878 * ib_get_vector_affinity - Get the affinity mappings of a given completion
4879 * vector
4880 * @device: the rdma device
4881 * @comp_vector: index of completion vector
4882 *
4883 * Returns NULL on failure, otherwise a corresponding cpu map of the
4884 * completion vector (returns all-cpus map if the device driver doesn't
4885 * implement get_vector_affinity).
4886 */
4887 static inline const struct cpumask *
ib_get_vector_affinity(struct ib_device * device,int comp_vector)4888 ib_get_vector_affinity(struct ib_device *device, int comp_vector)
4889 {
4890 if (comp_vector < 0 || comp_vector >= device->num_comp_vectors ||
4891 !device->ops.get_vector_affinity)
4892 return NULL;
4893
4894 return device->ops.get_vector_affinity(device, comp_vector);
4895
4896 }
4897
4898 /**
4899 * rdma_roce_rescan_device - Rescan all of the network devices in the system
4900 * and add their gids, as needed, to the relevant RoCE devices.
4901 *
4902 * @ibdev: the rdma device
4903 */
4904 void rdma_roce_rescan_device(struct ib_device *ibdev);
4905 void rdma_roce_rescan_port(struct ib_device *ib_dev, u32 port);
4906 void roce_del_all_netdev_gids(struct ib_device *ib_dev,
4907 u32 port, struct net_device *ndev);
4908
4909 struct ib_ucontext *ib_uverbs_get_ucontext_file(struct ib_uverbs_file *ufile);
4910
4911 #if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS)
4912 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs);
4913 bool rdma_uattrs_has_raw_cap(const struct uverbs_attr_bundle *attrs);
4914 #else
uverbs_destroy_def_handler(struct uverbs_attr_bundle * attrs)4915 static inline int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs)
4916 {
4917 return 0;
4918 }
4919 static inline bool
rdma_uattrs_has_raw_cap(const struct uverbs_attr_bundle * attrs)4920 rdma_uattrs_has_raw_cap(const struct uverbs_attr_bundle *attrs)
4921 {
4922 return false;
4923 }
4924 #endif
4925
4926 struct net_device *rdma_alloc_netdev(struct ib_device *device, u32 port_num,
4927 enum rdma_netdev_t type, const char *name,
4928 unsigned char name_assign_type,
4929 void (*setup)(struct net_device *));
4930
4931 int rdma_init_netdev(struct ib_device *device, u32 port_num,
4932 enum rdma_netdev_t type, const char *name,
4933 unsigned char name_assign_type,
4934 void (*setup)(struct net_device *),
4935 struct net_device *netdev);
4936
4937 /**
4938 * rdma_device_to_ibdev - Get ib_device pointer from device pointer
4939 *
4940 * @device: device pointer for which ib_device pointer to retrieve
4941 *
4942 * rdma_device_to_ibdev() retrieves ib_device pointer from device.
4943 *
4944 */
rdma_device_to_ibdev(struct device * device)4945 static inline struct ib_device *rdma_device_to_ibdev(struct device *device)
4946 {
4947 struct ib_core_device *coredev =
4948 container_of(device, struct ib_core_device, dev);
4949
4950 return coredev->owner;
4951 }
4952
4953 /**
4954 * ibdev_to_node - return the NUMA node for a given ib_device
4955 * @ibdev: device to get the NUMA node for.
4956 */
ibdev_to_node(struct ib_device * ibdev)4957 static inline int ibdev_to_node(struct ib_device *ibdev)
4958 {
4959 struct device *parent = ibdev->dev.parent;
4960
4961 if (!parent)
4962 return NUMA_NO_NODE;
4963 return dev_to_node(parent);
4964 }
4965
4966 /**
4967 * rdma_device_to_drv_device - Helper macro to reach back to driver's
4968 * ib_device holder structure from device pointer.
4969 *
4970 * NOTE: New drivers should not make use of this API; This API is only for
4971 * existing drivers who have exposed sysfs entries using
4972 * ops->device_group.
4973 */
4974 #define rdma_device_to_drv_device(dev, drv_dev_struct, ibdev_member) \
4975 container_of(rdma_device_to_ibdev(dev), drv_dev_struct, ibdev_member)
4976
4977 bool rdma_dev_access_netns(const struct ib_device *device,
4978 const struct net *net);
4979
4980 bool rdma_dev_has_raw_cap(const struct ib_device *dev);
rdma_dev_net(struct ib_device * device)4981 static inline struct net *rdma_dev_net(struct ib_device *device)
4982 {
4983 return read_pnet(&device->coredev.rdma_net);
4984 }
4985
4986 #define IB_ROCE_UDP_ENCAP_VALID_PORT_MIN (0xC000)
4987 #define IB_ROCE_UDP_ENCAP_VALID_PORT_MAX (0xFFFF)
4988 #define IB_GRH_FLOWLABEL_MASK (0x000FFFFF)
4989
4990 /**
4991 * rdma_flow_label_to_udp_sport - generate a RoCE v2 UDP src port value based
4992 * on the flow_label
4993 * @fl: flow_label value
4994 *
4995 * This function will convert the 20 bit flow_label input to a valid RoCE v2
4996 * UDP src port 14 bit value. All RoCE V2 drivers should use this same
4997 * convention.
4998 */
rdma_flow_label_to_udp_sport(u32 fl)4999 static inline u16 rdma_flow_label_to_udp_sport(u32 fl)
5000 {
5001 u32 fl_low = fl & 0x03fff, fl_high = fl & 0xFC000;
5002
5003 fl_low ^= fl_high >> 14;
5004 return (u16)(fl_low | IB_ROCE_UDP_ENCAP_VALID_PORT_MIN);
5005 }
5006
5007 /**
5008 * rdma_calc_flow_label - generate a RDMA symmetric flow label value based on
5009 * local and remote qpn values
5010 *
5011 * This function folded the multiplication results of two qpns, 24 bit each,
5012 * fields, and converts it to a 20 bit results.
5013 *
5014 * This function will create symmetric flow_label value based on the local
5015 * and remote qpn values. this will allow both the requester and responder
5016 * to calculate the same flow_label for a given connection.
5017 *
5018 * This helper function should be used by driver in case the upper layer
5019 * provide a zero flow_label value. This is to improve entropy of RDMA
5020 * traffic in the network.
5021 */
rdma_calc_flow_label(u32 lqpn,u32 rqpn)5022 static inline u32 rdma_calc_flow_label(u32 lqpn, u32 rqpn)
5023 {
5024 u64 v = (u64)lqpn * rqpn;
5025
5026 v ^= v >> 20;
5027 v ^= v >> 40;
5028
5029 return (u32)(v & IB_GRH_FLOWLABEL_MASK);
5030 }
5031
5032 /**
5033 * rdma_get_udp_sport - Calculate and set UDP source port based on the flow
5034 * label. If flow label is not defined in GRH then
5035 * calculate it based on lqpn/rqpn.
5036 *
5037 * @fl: flow label from GRH
5038 * @lqpn: local qp number
5039 * @rqpn: remote qp number
5040 */
rdma_get_udp_sport(u32 fl,u32 lqpn,u32 rqpn)5041 static inline u16 rdma_get_udp_sport(u32 fl, u32 lqpn, u32 rqpn)
5042 {
5043 if (!fl)
5044 fl = rdma_calc_flow_label(lqpn, rqpn);
5045
5046 return rdma_flow_label_to_udp_sport(fl);
5047 }
5048
5049 const struct ib_port_immutable*
5050 ib_port_immutable_read(struct ib_device *dev, unsigned int port);
5051
5052 /** ib_add_sub_device - Add a sub IB device on an existing one
5053 *
5054 * @parent: The IB device that needs to add a sub device
5055 * @type: The type of the new sub device
5056 * @name: The name of the new sub device
5057 *
5058 *
5059 * Return 0 on success, an error code otherwise
5060 */
5061 int ib_add_sub_device(struct ib_device *parent,
5062 enum rdma_nl_dev_type type,
5063 const char *name);
5064
5065
5066 /** ib_del_sub_device_and_put - Delect an IB sub device while holding a 'get'
5067 *
5068 * @sub: The sub device that is going to be deleted
5069 *
5070 * Return 0 on success, an error code otherwise
5071 */
5072 int ib_del_sub_device_and_put(struct ib_device *sub);
5073
ib_mark_name_assigned_by_user(struct ib_device * ibdev)5074 static inline void ib_mark_name_assigned_by_user(struct ib_device *ibdev)
5075 {
5076 ibdev->name_assign_type = RDMA_NAME_ASSIGN_TYPE_USER;
5077 }
5078
5079 #endif /* IB_VERBS_H */
5080