2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
4 * Copyright (c) 2004 Intel Corporation. All rights reserved.
5 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
8 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
39 #if !defined(IB_VERBS_H)
42 #include <linux/types.h>
43 #include <linux/device.h>
45 #include <linux/dma-mapping.h>
46 #include <linux/kref.h>
47 #include <linux/list.h>
48 #include <linux/rwsem.h>
49 #include <linux/scatterlist.h>
50 #include <linux/workqueue.h>
51 #include <linux/socket.h>
52 #include <linux/irq_poll.h>
53 #include <uapi/linux/if_ether.h>
56 #include <linux/string.h>
57 #include <linux/slab.h>
59 #include <linux/if_link.h>
60 #include <linux/atomic.h>
61 #include <linux/mmu_notifier.h>
62 #include <asm/uaccess.h>
64 extern struct workqueue_struct *ib_wq;
65 extern struct workqueue_struct *ib_comp_wq;
75 extern union ib_gid zgid;
78 /* If link layer is Ethernet, this is RoCE V1 */
81 IB_GID_TYPE_ROCE_UDP_ENCAP = 1,
85 #define ROCE_V2_UDP_DPORT 4791
87 enum ib_gid_type gid_type;
88 struct net_device *ndev;
92 /* IB values map to NodeInfo:NodeType. */
102 /* set the local administered indication */
103 IB_SA_WELL_KNOWN_GUID = BIT_ULL(57) | 2,
106 enum rdma_transport_type {
108 RDMA_TRANSPORT_IWARP,
109 RDMA_TRANSPORT_USNIC,
110 RDMA_TRANSPORT_USNIC_UDP
113 enum rdma_protocol_type {
117 RDMA_PROTOCOL_USNIC_UDP
120 __attribute_const__ enum rdma_transport_type
121 rdma_node_get_transport(enum rdma_node_type node_type);
123 enum rdma_network_type {
125 RDMA_NETWORK_ROCE_V1 = RDMA_NETWORK_IB,
130 static inline enum ib_gid_type ib_network_to_gid_type(enum rdma_network_type network_type)
132 if (network_type == RDMA_NETWORK_IPV4 ||
133 network_type == RDMA_NETWORK_IPV6)
134 return IB_GID_TYPE_ROCE_UDP_ENCAP;
136 /* IB_GID_TYPE_IB same as RDMA_NETWORK_ROCE_V1 */
137 return IB_GID_TYPE_IB;
140 static inline enum rdma_network_type ib_gid_to_network_type(enum ib_gid_type gid_type,
143 if (gid_type == IB_GID_TYPE_IB)
144 return RDMA_NETWORK_IB;
146 if (ipv6_addr_v4mapped((struct in6_addr *)gid))
147 return RDMA_NETWORK_IPV4;
149 return RDMA_NETWORK_IPV6;
152 enum rdma_link_layer {
153 IB_LINK_LAYER_UNSPECIFIED,
154 IB_LINK_LAYER_INFINIBAND,
155 IB_LINK_LAYER_ETHERNET,
158 enum ib_device_cap_flags {
159 IB_DEVICE_RESIZE_MAX_WR = (1 << 0),
160 IB_DEVICE_BAD_PKEY_CNTR = (1 << 1),
161 IB_DEVICE_BAD_QKEY_CNTR = (1 << 2),
162 IB_DEVICE_RAW_MULTI = (1 << 3),
163 IB_DEVICE_AUTO_PATH_MIG = (1 << 4),
164 IB_DEVICE_CHANGE_PHY_PORT = (1 << 5),
165 IB_DEVICE_UD_AV_PORT_ENFORCE = (1 << 6),
166 IB_DEVICE_CURR_QP_STATE_MOD = (1 << 7),
167 IB_DEVICE_SHUTDOWN_PORT = (1 << 8),
168 IB_DEVICE_INIT_TYPE = (1 << 9),
169 IB_DEVICE_PORT_ACTIVE_EVENT = (1 << 10),
170 IB_DEVICE_SYS_IMAGE_GUID = (1 << 11),
171 IB_DEVICE_RC_RNR_NAK_GEN = (1 << 12),
172 IB_DEVICE_SRQ_RESIZE = (1 << 13),
173 IB_DEVICE_N_NOTIFY_CQ = (1 << 14),
176 * This device supports a per-device lkey or stag that can be
177 * used without performing a memory registration for the local
178 * memory. Note that ULPs should never check this flag, but
179 * instead of use the local_dma_lkey flag in the ib_pd structure,
180 * which will always contain a usable lkey.
182 IB_DEVICE_LOCAL_DMA_LKEY = (1 << 15),
183 IB_DEVICE_RESERVED /* old SEND_W_INV */ = (1 << 16),
184 IB_DEVICE_MEM_WINDOW = (1 << 17),
186 * Devices should set IB_DEVICE_UD_IP_SUM if they support
187 * insertion of UDP and TCP checksum on outgoing UD IPoIB
188 * messages and can verify the validity of checksum for
189 * incoming messages. Setting this flag implies that the
190 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
192 IB_DEVICE_UD_IP_CSUM = (1 << 18),
193 IB_DEVICE_UD_TSO = (1 << 19),
194 IB_DEVICE_XRC = (1 << 20),
197 * This device supports the IB "base memory management extension",
198 * which includes support for fast registrations (IB_WR_REG_MR,
199 * IB_WR_LOCAL_INV and IB_WR_SEND_WITH_INV verbs). This flag should
200 * also be set by any iWarp device which must support FRs to comply
201 * to the iWarp verbs spec. iWarp devices also support the
202 * IB_WR_RDMA_READ_WITH_INV verb for RDMA READs that invalidate the
205 IB_DEVICE_MEM_MGT_EXTENSIONS = (1 << 21),
206 IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1 << 22),
207 IB_DEVICE_MEM_WINDOW_TYPE_2A = (1 << 23),
208 IB_DEVICE_MEM_WINDOW_TYPE_2B = (1 << 24),
209 IB_DEVICE_RC_IP_CSUM = (1 << 25),
210 IB_DEVICE_RAW_IP_CSUM = (1 << 26),
212 * Devices should set IB_DEVICE_CROSS_CHANNEL if they
213 * support execution of WQEs that involve synchronization
214 * of I/O operations with single completion queue managed
217 IB_DEVICE_CROSS_CHANNEL = (1 << 27),
218 IB_DEVICE_MANAGED_FLOW_STEERING = (1 << 29),
219 IB_DEVICE_SIGNATURE_HANDOVER = (1 << 30),
220 IB_DEVICE_ON_DEMAND_PAGING = (1 << 31),
221 IB_DEVICE_SG_GAPS_REG = (1ULL << 32),
222 IB_DEVICE_VIRTUAL_FUNCTION = ((u64)1 << 33),
223 IB_DEVICE_RAW_SCATTER_FCS = ((u64)1 << 34),
226 enum ib_signature_prot_cap {
227 IB_PROT_T10DIF_TYPE_1 = 1,
228 IB_PROT_T10DIF_TYPE_2 = 1 << 1,
229 IB_PROT_T10DIF_TYPE_3 = 1 << 2,
232 enum ib_signature_guard_cap {
233 IB_GUARD_T10DIF_CRC = 1,
234 IB_GUARD_T10DIF_CSUM = 1 << 1,
243 enum ib_odp_general_cap_bits {
244 IB_ODP_SUPPORT = 1 << 0,
247 enum ib_odp_transport_cap_bits {
248 IB_ODP_SUPPORT_SEND = 1 << 0,
249 IB_ODP_SUPPORT_RECV = 1 << 1,
250 IB_ODP_SUPPORT_WRITE = 1 << 2,
251 IB_ODP_SUPPORT_READ = 1 << 3,
252 IB_ODP_SUPPORT_ATOMIC = 1 << 4,
256 uint64_t general_caps;
258 uint32_t rc_odp_caps;
259 uint32_t uc_odp_caps;
260 uint32_t ud_odp_caps;
261 } per_transport_caps;
264 enum ib_cq_creation_flags {
265 IB_CQ_FLAGS_TIMESTAMP_COMPLETION = 1 << 0,
266 IB_CQ_FLAGS_IGNORE_OVERRUN = 1 << 1,
269 struct ib_cq_init_attr {
275 struct ib_device_attr {
277 __be64 sys_image_guid;
285 u64 device_cap_flags;
295 int max_qp_init_rd_atom;
296 int max_ee_init_rd_atom;
297 enum ib_atomic_cap atomic_cap;
298 enum ib_atomic_cap masked_atomic_cap;
305 int max_mcast_qp_attach;
306 int max_total_mcast_qp_attach;
313 unsigned int max_fast_reg_page_list_len;
315 u8 local_ca_ack_delay;
318 struct ib_odp_caps odp_caps;
319 uint64_t timestamp_mask;
320 uint64_t hca_core_clock; /* in KHZ */
331 static inline int ib_mtu_enum_to_int(enum ib_mtu mtu)
334 case IB_MTU_256: return 256;
335 case IB_MTU_512: return 512;
336 case IB_MTU_1024: return 1024;
337 case IB_MTU_2048: return 2048;
338 case IB_MTU_4096: return 4096;
349 IB_PORT_ACTIVE_DEFER = 5
352 enum ib_port_cap_flags {
354 IB_PORT_NOTICE_SUP = 1 << 2,
355 IB_PORT_TRAP_SUP = 1 << 3,
356 IB_PORT_OPT_IPD_SUP = 1 << 4,
357 IB_PORT_AUTO_MIGR_SUP = 1 << 5,
358 IB_PORT_SL_MAP_SUP = 1 << 6,
359 IB_PORT_MKEY_NVRAM = 1 << 7,
360 IB_PORT_PKEY_NVRAM = 1 << 8,
361 IB_PORT_LED_INFO_SUP = 1 << 9,
362 IB_PORT_SM_DISABLED = 1 << 10,
363 IB_PORT_SYS_IMAGE_GUID_SUP = 1 << 11,
364 IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP = 1 << 12,
365 IB_PORT_EXTENDED_SPEEDS_SUP = 1 << 14,
366 IB_PORT_CM_SUP = 1 << 16,
367 IB_PORT_SNMP_TUNNEL_SUP = 1 << 17,
368 IB_PORT_REINIT_SUP = 1 << 18,
369 IB_PORT_DEVICE_MGMT_SUP = 1 << 19,
370 IB_PORT_VENDOR_CLASS_SUP = 1 << 20,
371 IB_PORT_DR_NOTICE_SUP = 1 << 21,
372 IB_PORT_CAP_MASK_NOTICE_SUP = 1 << 22,
373 IB_PORT_BOOT_MGMT_SUP = 1 << 23,
374 IB_PORT_LINK_LATENCY_SUP = 1 << 24,
375 IB_PORT_CLIENT_REG_SUP = 1 << 25,
376 IB_PORT_IP_BASED_GIDS = 1 << 26,
386 static inline int ib_width_enum_to_int(enum ib_port_width width)
389 case IB_WIDTH_1X: return 1;
390 case IB_WIDTH_4X: return 4;
391 case IB_WIDTH_8X: return 8;
392 case IB_WIDTH_12X: return 12;
406 struct ib_protocol_stats {
410 struct iw_protocol_stats {
413 u64 ipInTooBigErrors;
416 u64 ipInUnknownProtos;
417 u64 ipInTruncatedPkts;
420 u64 ipOutForwDatagrams;
452 union rdma_protocol_stats {
453 struct ib_protocol_stats ib;
454 struct iw_protocol_stats iw;
457 /* Define bits for the various functionality this port needs to be supported by
460 /* Management 0x00000FFF */
461 #define RDMA_CORE_CAP_IB_MAD 0x00000001
462 #define RDMA_CORE_CAP_IB_SMI 0x00000002
463 #define RDMA_CORE_CAP_IB_CM 0x00000004
464 #define RDMA_CORE_CAP_IW_CM 0x00000008
465 #define RDMA_CORE_CAP_IB_SA 0x00000010
466 #define RDMA_CORE_CAP_OPA_MAD 0x00000020
468 /* Address format 0x000FF000 */
469 #define RDMA_CORE_CAP_AF_IB 0x00001000
470 #define RDMA_CORE_CAP_ETH_AH 0x00002000
472 /* Protocol 0xFFF00000 */
473 #define RDMA_CORE_CAP_PROT_IB 0x00100000
474 #define RDMA_CORE_CAP_PROT_ROCE 0x00200000
475 #define RDMA_CORE_CAP_PROT_IWARP 0x00400000
476 #define RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP 0x00800000
478 #define RDMA_CORE_PORT_IBA_IB (RDMA_CORE_CAP_PROT_IB \
479 | RDMA_CORE_CAP_IB_MAD \
480 | RDMA_CORE_CAP_IB_SMI \
481 | RDMA_CORE_CAP_IB_CM \
482 | RDMA_CORE_CAP_IB_SA \
483 | RDMA_CORE_CAP_AF_IB)
484 #define RDMA_CORE_PORT_IBA_ROCE (RDMA_CORE_CAP_PROT_ROCE \
485 | RDMA_CORE_CAP_IB_MAD \
486 | RDMA_CORE_CAP_IB_CM \
487 | RDMA_CORE_CAP_AF_IB \
488 | RDMA_CORE_CAP_ETH_AH)
489 #define RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP \
490 (RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP \
491 | RDMA_CORE_CAP_IB_MAD \
492 | RDMA_CORE_CAP_IB_CM \
493 | RDMA_CORE_CAP_AF_IB \
494 | RDMA_CORE_CAP_ETH_AH)
495 #define RDMA_CORE_PORT_IWARP (RDMA_CORE_CAP_PROT_IWARP \
496 | RDMA_CORE_CAP_IW_CM)
497 #define RDMA_CORE_PORT_INTEL_OPA (RDMA_CORE_PORT_IBA_IB \
498 | RDMA_CORE_CAP_OPA_MAD)
500 struct ib_port_attr {
502 enum ib_port_state state;
504 enum ib_mtu active_mtu;
524 enum ib_device_modify_flags {
525 IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0,
526 IB_DEVICE_MODIFY_NODE_DESC = 1 << 1
529 struct ib_device_modify {
534 enum ib_port_modify_flags {
535 IB_PORT_SHUTDOWN = 1,
536 IB_PORT_INIT_TYPE = (1<<2),
537 IB_PORT_RESET_QKEY_CNTR = (1<<3)
540 struct ib_port_modify {
541 u32 set_port_cap_mask;
542 u32 clr_port_cap_mask;
550 IB_EVENT_QP_ACCESS_ERR,
554 IB_EVENT_PATH_MIG_ERR,
555 IB_EVENT_DEVICE_FATAL,
556 IB_EVENT_PORT_ACTIVE,
559 IB_EVENT_PKEY_CHANGE,
562 IB_EVENT_SRQ_LIMIT_REACHED,
563 IB_EVENT_QP_LAST_WQE_REACHED,
564 IB_EVENT_CLIENT_REREGISTER,
568 const char *__attribute_const__ ib_event_msg(enum ib_event_type event);
571 struct ib_device *device;
578 enum ib_event_type event;
581 struct ib_event_handler {
582 struct ib_device *device;
583 void (*handler)(struct ib_event_handler *, struct ib_event *);
584 struct list_head list;
587 #define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler) \
589 (_ptr)->device = _device; \
590 (_ptr)->handler = _handler; \
591 INIT_LIST_HEAD(&(_ptr)->list); \
594 struct ib_global_route {
603 __be32 version_tclass_flow;
611 union rdma_network_hdr {
614 /* The IB spec states that if it's IPv4, the header
615 * is located in the last 20 bytes of the header.
618 struct iphdr roce4grh;
623 IB_MULTICAST_QPN = 0xffffff
626 #define IB_LID_PERMISSIVE cpu_to_be16(0xFFFF)
627 #define IB_MULTICAST_LID_BASE cpu_to_be16(0xC000)
634 IB_RATE_PORT_CURRENT = 0,
635 IB_RATE_2_5_GBPS = 2,
643 IB_RATE_120_GBPS = 10,
644 IB_RATE_14_GBPS = 11,
645 IB_RATE_56_GBPS = 12,
646 IB_RATE_112_GBPS = 13,
647 IB_RATE_168_GBPS = 14,
648 IB_RATE_25_GBPS = 15,
649 IB_RATE_100_GBPS = 16,
650 IB_RATE_200_GBPS = 17,
651 IB_RATE_300_GBPS = 18
655 * ib_rate_to_mult - Convert the IB rate enum to a multiple of the
656 * base rate of 2.5 Gbit/sec. For example, IB_RATE_5_GBPS will be
657 * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec.
658 * @rate: rate to convert.
660 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate);
663 * ib_rate_to_mbps - Convert the IB rate enum to Mbps.
664 * For example, IB_RATE_2_5_GBPS will be converted to 2500.
665 * @rate: rate to convert.
667 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);
671 * enum ib_mr_type - memory region type
672 * @IB_MR_TYPE_MEM_REG: memory region that is used for
673 * normal registration
674 * @IB_MR_TYPE_SIGNATURE: memory region that is used for
675 * signature operations (data-integrity
677 * @IB_MR_TYPE_SG_GAPS: memory region that is capable to
678 * register any arbitrary sg lists (without
679 * the normal mr constraints - see
684 IB_MR_TYPE_SIGNATURE,
690 * IB_SIG_TYPE_NONE: Unprotected.
691 * IB_SIG_TYPE_T10_DIF: Type T10-DIF
693 enum ib_signature_type {
699 * Signature T10-DIF block-guard types
700 * IB_T10DIF_CRC: Corresponds to T10-PI mandated CRC checksum rules.
701 * IB_T10DIF_CSUM: Corresponds to IP checksum rules.
703 enum ib_t10_dif_bg_type {
709 * struct ib_t10_dif_domain - Parameters specific for T10-DIF
711 * @bg_type: T10-DIF block guard type (CRC|CSUM)
712 * @pi_interval: protection information interval.
713 * @bg: seed of guard computation.
714 * @app_tag: application tag of guard block
715 * @ref_tag: initial guard block reference tag.
716 * @ref_remap: Indicate wethear the reftag increments each block
717 * @app_escape: Indicate to skip block check if apptag=0xffff
718 * @ref_escape: Indicate to skip block check if reftag=0xffffffff
719 * @apptag_check_mask: check bitmask of application tag.
721 struct ib_t10_dif_domain {
722 enum ib_t10_dif_bg_type bg_type;
730 u16 apptag_check_mask;
734 * struct ib_sig_domain - Parameters for signature domain
735 * @sig_type: specific signauture type
736 * @sig: union of all signature domain attributes that may
737 * be used to set domain layout.
739 struct ib_sig_domain {
740 enum ib_signature_type sig_type;
742 struct ib_t10_dif_domain dif;
747 * struct ib_sig_attrs - Parameters for signature handover operation
748 * @check_mask: bitmask for signature byte check (8 bytes)
749 * @mem: memory domain layout desciptor.
750 * @wire: wire domain layout desciptor.
752 struct ib_sig_attrs {
754 struct ib_sig_domain mem;
755 struct ib_sig_domain wire;
758 enum ib_sig_err_type {
765 * struct ib_sig_err - signature error descriptor
768 enum ib_sig_err_type err_type;
775 enum ib_mr_status_check {
776 IB_MR_CHECK_SIG_STATUS = 1,
780 * struct ib_mr_status - Memory region status container
782 * @fail_status: Bitmask of MR checks status. For each
783 * failed check a corresponding status bit is set.
784 * @sig_err: Additional info for IB_MR_CEHCK_SIG_STATUS
787 struct ib_mr_status {
789 struct ib_sig_err sig_err;
793 * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
795 * @mult: multiple to convert.
797 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult);
800 struct ib_global_route grh;
814 IB_WC_LOC_EEC_OP_ERR,
819 IB_WC_LOC_ACCESS_ERR,
820 IB_WC_REM_INV_REQ_ERR,
821 IB_WC_REM_ACCESS_ERR,
824 IB_WC_RNR_RETRY_EXC_ERR,
825 IB_WC_LOC_RDD_VIOL_ERR,
826 IB_WC_REM_INV_RD_REQ_ERR,
829 IB_WC_INV_EEC_STATE_ERR,
831 IB_WC_RESP_TIMEOUT_ERR,
835 const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status);
846 IB_WC_MASKED_COMP_SWAP,
847 IB_WC_MASKED_FETCH_ADD,
849 * Set value of IB_WC_RECV so consumers can test if a completion is a
850 * receive by testing (opcode & IB_WC_RECV).
853 IB_WC_RECV_RDMA_WITH_IMM
858 IB_WC_WITH_IMM = (1<<1),
859 IB_WC_WITH_INVALIDATE = (1<<2),
860 IB_WC_IP_CSUM_OK = (1<<3),
861 IB_WC_WITH_SMAC = (1<<4),
862 IB_WC_WITH_VLAN = (1<<5),
863 IB_WC_WITH_NETWORK_HDR_TYPE = (1<<6),
869 struct ib_cqe *wr_cqe;
871 enum ib_wc_status status;
872 enum ib_wc_opcode opcode;
886 u8 port_num; /* valid only for DR SMPs on switches */
892 enum ib_cq_notify_flags {
893 IB_CQ_SOLICITED = 1 << 0,
894 IB_CQ_NEXT_COMP = 1 << 1,
895 IB_CQ_SOLICITED_MASK = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP,
896 IB_CQ_REPORT_MISSED_EVENTS = 1 << 2,
904 enum ib_srq_attr_mask {
905 IB_SRQ_MAX_WR = 1 << 0,
906 IB_SRQ_LIMIT = 1 << 1,
915 struct ib_srq_init_attr {
916 void (*event_handler)(struct ib_event *, void *);
918 struct ib_srq_attr attr;
919 enum ib_srq_type srq_type;
923 struct ib_xrcd *xrcd;
944 * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries
945 * here (and in that order) since the MAD layer uses them as
946 * indices into a 2-entry table.
955 IB_QPT_RAW_ETHERTYPE,
956 IB_QPT_RAW_PACKET = 8,
960 /* Reserve a range for qp types internal to the low level driver.
961 * These qp types will not be visible at the IB core layer, so the
962 * IB_QPT_MAX usages should not be affected in the core layer
964 IB_QPT_RESERVED1 = 0x1000,
976 enum ib_qp_create_flags {
977 IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0,
978 IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK = 1 << 1,
979 IB_QP_CREATE_CROSS_CHANNEL = 1 << 2,
980 IB_QP_CREATE_MANAGED_SEND = 1 << 3,
981 IB_QP_CREATE_MANAGED_RECV = 1 << 4,
982 IB_QP_CREATE_NETIF_QP = 1 << 5,
983 IB_QP_CREATE_SIGNATURE_EN = 1 << 6,
984 IB_QP_CREATE_USE_GFP_NOIO = 1 << 7,
985 IB_QP_CREATE_SCATTER_FCS = 1 << 8,
986 /* reserve bits 26-31 for low level drivers' internal use */
987 IB_QP_CREATE_RESERVED_START = 1 << 26,
988 IB_QP_CREATE_RESERVED_END = 1 << 31,
992 * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler
993 * callback to destroy the passed in QP.
996 struct ib_qp_init_attr {
997 void (*event_handler)(struct ib_event *, void *);
999 struct ib_cq *send_cq;
1000 struct ib_cq *recv_cq;
1002 struct ib_xrcd *xrcd; /* XRC TGT QPs only */
1003 struct ib_qp_cap cap;
1004 enum ib_sig_type sq_sig_type;
1005 enum ib_qp_type qp_type;
1006 enum ib_qp_create_flags create_flags;
1007 u8 port_num; /* special QP types only */
1010 struct ib_qp_open_attr {
1011 void (*event_handler)(struct ib_event *, void *);
1014 enum ib_qp_type qp_type;
1017 enum ib_rnr_timeout {
1018 IB_RNR_TIMER_655_36 = 0,
1019 IB_RNR_TIMER_000_01 = 1,
1020 IB_RNR_TIMER_000_02 = 2,
1021 IB_RNR_TIMER_000_03 = 3,
1022 IB_RNR_TIMER_000_04 = 4,
1023 IB_RNR_TIMER_000_06 = 5,
1024 IB_RNR_TIMER_000_08 = 6,
1025 IB_RNR_TIMER_000_12 = 7,
1026 IB_RNR_TIMER_000_16 = 8,
1027 IB_RNR_TIMER_000_24 = 9,
1028 IB_RNR_TIMER_000_32 = 10,
1029 IB_RNR_TIMER_000_48 = 11,
1030 IB_RNR_TIMER_000_64 = 12,
1031 IB_RNR_TIMER_000_96 = 13,
1032 IB_RNR_TIMER_001_28 = 14,
1033 IB_RNR_TIMER_001_92 = 15,
1034 IB_RNR_TIMER_002_56 = 16,
1035 IB_RNR_TIMER_003_84 = 17,
1036 IB_RNR_TIMER_005_12 = 18,
1037 IB_RNR_TIMER_007_68 = 19,
1038 IB_RNR_TIMER_010_24 = 20,
1039 IB_RNR_TIMER_015_36 = 21,
1040 IB_RNR_TIMER_020_48 = 22,
1041 IB_RNR_TIMER_030_72 = 23,
1042 IB_RNR_TIMER_040_96 = 24,
1043 IB_RNR_TIMER_061_44 = 25,
1044 IB_RNR_TIMER_081_92 = 26,
1045 IB_RNR_TIMER_122_88 = 27,
1046 IB_RNR_TIMER_163_84 = 28,
1047 IB_RNR_TIMER_245_76 = 29,
1048 IB_RNR_TIMER_327_68 = 30,
1049 IB_RNR_TIMER_491_52 = 31
1052 enum ib_qp_attr_mask {
1054 IB_QP_CUR_STATE = (1<<1),
1055 IB_QP_EN_SQD_ASYNC_NOTIFY = (1<<2),
1056 IB_QP_ACCESS_FLAGS = (1<<3),
1057 IB_QP_PKEY_INDEX = (1<<4),
1058 IB_QP_PORT = (1<<5),
1059 IB_QP_QKEY = (1<<6),
1061 IB_QP_PATH_MTU = (1<<8),
1062 IB_QP_TIMEOUT = (1<<9),
1063 IB_QP_RETRY_CNT = (1<<10),
1064 IB_QP_RNR_RETRY = (1<<11),
1065 IB_QP_RQ_PSN = (1<<12),
1066 IB_QP_MAX_QP_RD_ATOMIC = (1<<13),
1067 IB_QP_ALT_PATH = (1<<14),
1068 IB_QP_MIN_RNR_TIMER = (1<<15),
1069 IB_QP_SQ_PSN = (1<<16),
1070 IB_QP_MAX_DEST_RD_ATOMIC = (1<<17),
1071 IB_QP_PATH_MIG_STATE = (1<<18),
1072 IB_QP_CAP = (1<<19),
1073 IB_QP_DEST_QPN = (1<<20),
1074 IB_QP_RESERVED1 = (1<<21),
1075 IB_QP_RESERVED2 = (1<<22),
1076 IB_QP_RESERVED3 = (1<<23),
1077 IB_QP_RESERVED4 = (1<<24),
1102 enum ib_qp_state qp_state;
1103 enum ib_qp_state cur_qp_state;
1104 enum ib_mtu path_mtu;
1105 enum ib_mig_state path_mig_state;
1110 int qp_access_flags;
1111 struct ib_qp_cap cap;
1112 struct ib_ah_attr ah_attr;
1113 struct ib_ah_attr alt_ah_attr;
1116 u8 en_sqd_async_notify;
1119 u8 max_dest_rd_atomic;
1131 IB_WR_RDMA_WRITE_WITH_IMM,
1133 IB_WR_SEND_WITH_IMM,
1135 IB_WR_ATOMIC_CMP_AND_SWP,
1136 IB_WR_ATOMIC_FETCH_AND_ADD,
1138 IB_WR_SEND_WITH_INV,
1139 IB_WR_RDMA_READ_WITH_INV,
1142 IB_WR_MASKED_ATOMIC_CMP_AND_SWP,
1143 IB_WR_MASKED_ATOMIC_FETCH_AND_ADD,
1145 /* reserve values for low level drivers' internal use.
1146 * These values will not be used at all in the ib core layer.
1148 IB_WR_RESERVED1 = 0xf0,
1160 enum ib_send_flags {
1162 IB_SEND_SIGNALED = (1<<1),
1163 IB_SEND_SOLICITED = (1<<2),
1164 IB_SEND_INLINE = (1<<3),
1165 IB_SEND_IP_CSUM = (1<<4),
1167 /* reserve bits 26-31 for low level drivers' internal use */
1168 IB_SEND_RESERVED_START = (1 << 26),
1169 IB_SEND_RESERVED_END = (1 << 31),
1179 void (*done)(struct ib_cq *cq, struct ib_wc *wc);
1183 struct ib_send_wr *next;
1186 struct ib_cqe *wr_cqe;
1188 struct ib_sge *sg_list;
1190 enum ib_wr_opcode opcode;
1194 u32 invalidate_rkey;
1199 struct ib_send_wr wr;
1204 static inline struct ib_rdma_wr *rdma_wr(struct ib_send_wr *wr)
1206 return container_of(wr, struct ib_rdma_wr, wr);
1209 struct ib_atomic_wr {
1210 struct ib_send_wr wr;
1214 u64 compare_add_mask;
1219 static inline struct ib_atomic_wr *atomic_wr(struct ib_send_wr *wr)
1221 return container_of(wr, struct ib_atomic_wr, wr);
1225 struct ib_send_wr wr;
1232 u16 pkey_index; /* valid for GSI only */
1233 u8 port_num; /* valid for DR SMPs on switch only */
1236 static inline struct ib_ud_wr *ud_wr(struct ib_send_wr *wr)
1238 return container_of(wr, struct ib_ud_wr, wr);
1242 struct ib_send_wr wr;
1248 static inline struct ib_reg_wr *reg_wr(struct ib_send_wr *wr)
1250 return container_of(wr, struct ib_reg_wr, wr);
1253 struct ib_sig_handover_wr {
1254 struct ib_send_wr wr;
1255 struct ib_sig_attrs *sig_attrs;
1256 struct ib_mr *sig_mr;
1258 struct ib_sge *prot;
1261 static inline struct ib_sig_handover_wr *sig_handover_wr(struct ib_send_wr *wr)
1263 return container_of(wr, struct ib_sig_handover_wr, wr);
1267 struct ib_recv_wr *next;
1270 struct ib_cqe *wr_cqe;
1272 struct ib_sge *sg_list;
1276 enum ib_access_flags {
1277 IB_ACCESS_LOCAL_WRITE = 1,
1278 IB_ACCESS_REMOTE_WRITE = (1<<1),
1279 IB_ACCESS_REMOTE_READ = (1<<2),
1280 IB_ACCESS_REMOTE_ATOMIC = (1<<3),
1281 IB_ACCESS_MW_BIND = (1<<4),
1282 IB_ZERO_BASED = (1<<5),
1283 IB_ACCESS_ON_DEMAND = (1<<6),
1287 * XXX: these are apparently used for ->rereg_user_mr, no idea why they
1288 * are hidden here instead of a uapi header!
1290 enum ib_mr_rereg_flags {
1291 IB_MR_REREG_TRANS = 1,
1292 IB_MR_REREG_PD = (1<<1),
1293 IB_MR_REREG_ACCESS = (1<<2),
1294 IB_MR_REREG_SUPPORTED = ((IB_MR_REREG_ACCESS << 1) - 1)
1297 struct ib_fmr_attr {
1305 struct ib_ucontext {
1306 struct ib_device *device;
1307 struct list_head pd_list;
1308 struct list_head mr_list;
1309 struct list_head mw_list;
1310 struct list_head cq_list;
1311 struct list_head qp_list;
1312 struct list_head srq_list;
1313 struct list_head ah_list;
1314 struct list_head xrcd_list;
1315 struct list_head rule_list;
1319 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
1320 struct rb_root umem_tree;
1322 * Protects .umem_rbroot and tree, as well as odp_mrs_count and
1323 * mmu notifiers registration.
1325 struct rw_semaphore umem_rwsem;
1326 void (*invalidate_range)(struct ib_umem *umem,
1327 unsigned long start, unsigned long end);
1329 struct mmu_notifier mn;
1330 atomic_t notifier_count;
1331 /* A list of umems that don't have private mmu notifier counters yet. */
1332 struct list_head no_private_counters;
1338 u64 user_handle; /* handle given to us by userspace */
1339 struct ib_ucontext *context; /* associated user context */
1340 void *object; /* containing object */
1341 struct list_head list; /* link to context's list */
1342 int id; /* index into kernel idr */
1344 struct rw_semaphore mutex; /* protects .live */
1345 struct rcu_head rcu; /* kfree_rcu() overhead */
1350 const void __user *inbuf;
1351 void __user *outbuf;
1358 struct ib_device *device;
1359 struct ib_uobject *uobject;
1360 atomic_t usecnt; /* count all resources */
1361 struct ib_mr *local_mr;
1365 struct ib_device *device;
1366 atomic_t usecnt; /* count all exposed resources */
1367 struct inode *inode;
1369 struct mutex tgt_qp_mutex;
1370 struct list_head tgt_qp_list;
1374 struct ib_device *device;
1376 struct ib_uobject *uobject;
1379 typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context);
1381 enum ib_poll_context {
1382 IB_POLL_DIRECT, /* caller context, no hw completions */
1383 IB_POLL_SOFTIRQ, /* poll from softirq context */
1384 IB_POLL_WORKQUEUE, /* poll from workqueue */
1388 struct ib_device *device;
1389 struct ib_uobject *uobject;
1390 ib_comp_handler comp_handler;
1391 void (*event_handler)(struct ib_event *, void *);
1394 atomic_t usecnt; /* count number of work queues */
1395 enum ib_poll_context poll_ctx;
1398 struct irq_poll iop;
1399 struct work_struct work;
1404 struct ib_device *device;
1406 struct ib_uobject *uobject;
1407 void (*event_handler)(struct ib_event *, void *);
1409 enum ib_srq_type srq_type;
1414 struct ib_xrcd *xrcd;
1422 struct ib_device *device;
1424 struct ib_cq *send_cq;
1425 struct ib_cq *recv_cq;
1427 struct ib_xrcd *xrcd; /* XRC TGT QPs only */
1428 struct list_head xrcd_list;
1429 /* count times opened, mcast attaches, flow attaches */
1431 struct list_head open_list;
1432 struct ib_qp *real_qp;
1433 struct ib_uobject *uobject;
1434 void (*event_handler)(struct ib_event *, void *);
1437 enum ib_qp_type qp_type;
1441 struct ib_device *device;
1443 struct ib_uobject *uobject;
1448 unsigned int page_size;
1452 struct ib_device *device;
1454 struct ib_uobject *uobject;
1456 enum ib_mw_type type;
1460 struct ib_device *device;
1462 struct list_head list;
1467 /* Supported steering options */
1468 enum ib_flow_attr_type {
1469 /* steering according to rule specifications */
1470 IB_FLOW_ATTR_NORMAL = 0x0,
1471 /* default unicast and multicast rule -
1472 * receive all Eth traffic which isn't steered to any QP
1474 IB_FLOW_ATTR_ALL_DEFAULT = 0x1,
1475 /* default multicast rule -
1476 * receive all Eth multicast traffic which isn't steered to any QP
1478 IB_FLOW_ATTR_MC_DEFAULT = 0x2,
1479 /* sniffer rule - receive all port traffic */
1480 IB_FLOW_ATTR_SNIFFER = 0x3
1483 /* Supported steering header types */
1484 enum ib_flow_spec_type {
1486 IB_FLOW_SPEC_ETH = 0x20,
1487 IB_FLOW_SPEC_IB = 0x22,
1489 IB_FLOW_SPEC_IPV4 = 0x30,
1491 IB_FLOW_SPEC_TCP = 0x40,
1492 IB_FLOW_SPEC_UDP = 0x41
1494 #define IB_FLOW_SPEC_LAYER_MASK 0xF0
1495 #define IB_FLOW_SPEC_SUPPORT_LAYERS 4
1497 /* Flow steering rule priority is set according to it's domain.
1498 * Lower domain value means higher priority.
1500 enum ib_flow_domain {
1501 IB_FLOW_DOMAIN_USER,
1502 IB_FLOW_DOMAIN_ETHTOOL,
1505 IB_FLOW_DOMAIN_NUM /* Must be last */
1508 enum ib_flow_flags {
1509 IB_FLOW_ATTR_FLAGS_DONT_TRAP = 1UL << 1, /* Continue match, no steal */
1510 IB_FLOW_ATTR_FLAGS_RESERVED = 1UL << 2 /* Must be last */
1513 struct ib_flow_eth_filter {
1520 struct ib_flow_spec_eth {
1521 enum ib_flow_spec_type type;
1523 struct ib_flow_eth_filter val;
1524 struct ib_flow_eth_filter mask;
1527 struct ib_flow_ib_filter {
1532 struct ib_flow_spec_ib {
1533 enum ib_flow_spec_type type;
1535 struct ib_flow_ib_filter val;
1536 struct ib_flow_ib_filter mask;
1539 struct ib_flow_ipv4_filter {
1544 struct ib_flow_spec_ipv4 {
1545 enum ib_flow_spec_type type;
1547 struct ib_flow_ipv4_filter val;
1548 struct ib_flow_ipv4_filter mask;
1551 struct ib_flow_tcp_udp_filter {
1556 struct ib_flow_spec_tcp_udp {
1557 enum ib_flow_spec_type type;
1559 struct ib_flow_tcp_udp_filter val;
1560 struct ib_flow_tcp_udp_filter mask;
1563 union ib_flow_spec {
1565 enum ib_flow_spec_type type;
1568 struct ib_flow_spec_eth eth;
1569 struct ib_flow_spec_ib ib;
1570 struct ib_flow_spec_ipv4 ipv4;
1571 struct ib_flow_spec_tcp_udp tcp_udp;
1574 struct ib_flow_attr {
1575 enum ib_flow_attr_type type;
1581 /* Following are the optional layers according to user request
1582 * struct ib_flow_spec_xxx
1583 * struct ib_flow_spec_yyy
1589 struct ib_uobject *uobject;
1595 enum ib_process_mad_flags {
1596 IB_MAD_IGNORE_MKEY = 1,
1597 IB_MAD_IGNORE_BKEY = 2,
1598 IB_MAD_IGNORE_ALL = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY
1601 enum ib_mad_result {
1602 IB_MAD_RESULT_FAILURE = 0, /* (!SUCCESS is the important flag) */
1603 IB_MAD_RESULT_SUCCESS = 1 << 0, /* MAD was successfully processed */
1604 IB_MAD_RESULT_REPLY = 1 << 1, /* Reply packet needs to be sent */
1605 IB_MAD_RESULT_CONSUMED = 1 << 2 /* Packet consumed: stop processing */
1608 #define IB_DEVICE_NAME_MAX 64
1612 struct ib_event_handler event_handler;
1613 struct ib_pkey_cache **pkey_cache;
1614 struct ib_gid_table **gid_cache;
1618 struct ib_dma_mapping_ops {
1619 int (*mapping_error)(struct ib_device *dev,
1621 u64 (*map_single)(struct ib_device *dev,
1622 void *ptr, size_t size,
1623 enum dma_data_direction direction);
1624 void (*unmap_single)(struct ib_device *dev,
1625 u64 addr, size_t size,
1626 enum dma_data_direction direction);
1627 u64 (*map_page)(struct ib_device *dev,
1628 struct page *page, unsigned long offset,
1630 enum dma_data_direction direction);
1631 void (*unmap_page)(struct ib_device *dev,
1632 u64 addr, size_t size,
1633 enum dma_data_direction direction);
1634 int (*map_sg)(struct ib_device *dev,
1635 struct scatterlist *sg, int nents,
1636 enum dma_data_direction direction);
1637 void (*unmap_sg)(struct ib_device *dev,
1638 struct scatterlist *sg, int nents,
1639 enum dma_data_direction direction);
1640 void (*sync_single_for_cpu)(struct ib_device *dev,
1643 enum dma_data_direction dir);
1644 void (*sync_single_for_device)(struct ib_device *dev,
1647 enum dma_data_direction dir);
1648 void *(*alloc_coherent)(struct ib_device *dev,
1652 void (*free_coherent)(struct ib_device *dev,
1653 size_t size, void *cpu_addr,
1659 struct ib_port_immutable {
1667 struct device *dma_device;
1669 char name[IB_DEVICE_NAME_MAX];
1671 struct list_head event_handler_list;
1672 spinlock_t event_handler_lock;
1674 spinlock_t client_data_lock;
1675 struct list_head core_list;
1676 /* Access to the client_data_list is protected by the client_data_lock
1677 * spinlock and the lists_rwsem read-write semaphore */
1678 struct list_head client_data_list;
1680 struct ib_cache cache;
1682 * port_immutable is indexed by port number
1684 struct ib_port_immutable *port_immutable;
1686 int num_comp_vectors;
1688 struct iw_cm_verbs *iwcm;
1690 int (*get_protocol_stats)(struct ib_device *device,
1691 union rdma_protocol_stats *stats);
1692 int (*query_device)(struct ib_device *device,
1693 struct ib_device_attr *device_attr,
1694 struct ib_udata *udata);
1695 int (*query_port)(struct ib_device *device,
1697 struct ib_port_attr *port_attr);
1698 enum rdma_link_layer (*get_link_layer)(struct ib_device *device,
1700 /* When calling get_netdev, the HW vendor's driver should return the
1701 * net device of device @device at port @port_num or NULL if such
1702 * a net device doesn't exist. The vendor driver should call dev_hold
1703 * on this net device. The HW vendor's device driver must guarantee
1704 * that this function returns NULL before the net device reaches
1705 * NETDEV_UNREGISTER_FINAL state.
1707 struct net_device *(*get_netdev)(struct ib_device *device,
1709 int (*query_gid)(struct ib_device *device,
1710 u8 port_num, int index,
1712 /* When calling add_gid, the HW vendor's driver should
1713 * add the gid of device @device at gid index @index of
1714 * port @port_num to be @gid. Meta-info of that gid (for example,
1715 * the network device related to this gid is available
1716 * at @attr. @context allows the HW vendor driver to store extra
1717 * information together with a GID entry. The HW vendor may allocate
1718 * memory to contain this information and store it in @context when a
1719 * new GID entry is written to. Params are consistent until the next
1720 * call of add_gid or delete_gid. The function should return 0 on
1721 * success or error otherwise. The function could be called
1722 * concurrently for different ports. This function is only called
1723 * when roce_gid_table is used.
1725 int (*add_gid)(struct ib_device *device,
1728 const union ib_gid *gid,
1729 const struct ib_gid_attr *attr,
1731 /* When calling del_gid, the HW vendor's driver should delete the
1732 * gid of device @device at gid index @index of port @port_num.
1733 * Upon the deletion of a GID entry, the HW vendor must free any
1734 * allocated memory. The caller will clear @context afterwards.
1735 * This function is only called when roce_gid_table is used.
1737 int (*del_gid)(struct ib_device *device,
1741 int (*query_pkey)(struct ib_device *device,
1742 u8 port_num, u16 index, u16 *pkey);
1743 int (*modify_device)(struct ib_device *device,
1744 int device_modify_mask,
1745 struct ib_device_modify *device_modify);
1746 int (*modify_port)(struct ib_device *device,
1747 u8 port_num, int port_modify_mask,
1748 struct ib_port_modify *port_modify);
1749 struct ib_ucontext * (*alloc_ucontext)(struct ib_device *device,
1750 struct ib_udata *udata);
1751 int (*dealloc_ucontext)(struct ib_ucontext *context);
1752 int (*mmap)(struct ib_ucontext *context,
1753 struct vm_area_struct *vma);
1754 struct ib_pd * (*alloc_pd)(struct ib_device *device,
1755 struct ib_ucontext *context,
1756 struct ib_udata *udata);
1757 int (*dealloc_pd)(struct ib_pd *pd);
1758 struct ib_ah * (*create_ah)(struct ib_pd *pd,
1759 struct ib_ah_attr *ah_attr);
1760 int (*modify_ah)(struct ib_ah *ah,
1761 struct ib_ah_attr *ah_attr);
1762 int (*query_ah)(struct ib_ah *ah,
1763 struct ib_ah_attr *ah_attr);
1764 int (*destroy_ah)(struct ib_ah *ah);
1765 struct ib_srq * (*create_srq)(struct ib_pd *pd,
1766 struct ib_srq_init_attr *srq_init_attr,
1767 struct ib_udata *udata);
1768 int (*modify_srq)(struct ib_srq *srq,
1769 struct ib_srq_attr *srq_attr,
1770 enum ib_srq_attr_mask srq_attr_mask,
1771 struct ib_udata *udata);
1772 int (*query_srq)(struct ib_srq *srq,
1773 struct ib_srq_attr *srq_attr);
1774 int (*destroy_srq)(struct ib_srq *srq);
1775 int (*post_srq_recv)(struct ib_srq *srq,
1776 struct ib_recv_wr *recv_wr,
1777 struct ib_recv_wr **bad_recv_wr);
1778 struct ib_qp * (*create_qp)(struct ib_pd *pd,
1779 struct ib_qp_init_attr *qp_init_attr,
1780 struct ib_udata *udata);
1781 int (*modify_qp)(struct ib_qp *qp,
1782 struct ib_qp_attr *qp_attr,
1784 struct ib_udata *udata);
1785 int (*query_qp)(struct ib_qp *qp,
1786 struct ib_qp_attr *qp_attr,
1788 struct ib_qp_init_attr *qp_init_attr);
1789 int (*destroy_qp)(struct ib_qp *qp);
1790 int (*post_send)(struct ib_qp *qp,
1791 struct ib_send_wr *send_wr,
1792 struct ib_send_wr **bad_send_wr);
1793 int (*post_recv)(struct ib_qp *qp,
1794 struct ib_recv_wr *recv_wr,
1795 struct ib_recv_wr **bad_recv_wr);
1796 struct ib_cq * (*create_cq)(struct ib_device *device,
1797 const struct ib_cq_init_attr *attr,
1798 struct ib_ucontext *context,
1799 struct ib_udata *udata);
1800 int (*modify_cq)(struct ib_cq *cq, u16 cq_count,
1802 int (*destroy_cq)(struct ib_cq *cq);
1803 int (*resize_cq)(struct ib_cq *cq, int cqe,
1804 struct ib_udata *udata);
1805 int (*poll_cq)(struct ib_cq *cq, int num_entries,
1807 int (*peek_cq)(struct ib_cq *cq, int wc_cnt);
1808 int (*req_notify_cq)(struct ib_cq *cq,
1809 enum ib_cq_notify_flags flags);
1810 int (*req_ncomp_notif)(struct ib_cq *cq,
1812 struct ib_mr * (*get_dma_mr)(struct ib_pd *pd,
1813 int mr_access_flags);
1814 struct ib_mr * (*reg_user_mr)(struct ib_pd *pd,
1815 u64 start, u64 length,
1817 int mr_access_flags,
1818 struct ib_udata *udata);
1819 int (*rereg_user_mr)(struct ib_mr *mr,
1821 u64 start, u64 length,
1823 int mr_access_flags,
1825 struct ib_udata *udata);
1826 int (*dereg_mr)(struct ib_mr *mr);
1827 struct ib_mr * (*alloc_mr)(struct ib_pd *pd,
1828 enum ib_mr_type mr_type,
1830 int (*map_mr_sg)(struct ib_mr *mr,
1831 struct scatterlist *sg,
1833 struct ib_mw * (*alloc_mw)(struct ib_pd *pd,
1834 enum ib_mw_type type,
1835 struct ib_udata *udata);
1836 int (*dealloc_mw)(struct ib_mw *mw);
1837 struct ib_fmr * (*alloc_fmr)(struct ib_pd *pd,
1838 int mr_access_flags,
1839 struct ib_fmr_attr *fmr_attr);
1840 int (*map_phys_fmr)(struct ib_fmr *fmr,
1841 u64 *page_list, int list_len,
1843 int (*unmap_fmr)(struct list_head *fmr_list);
1844 int (*dealloc_fmr)(struct ib_fmr *fmr);
1845 int (*attach_mcast)(struct ib_qp *qp,
1848 int (*detach_mcast)(struct ib_qp *qp,
1851 int (*process_mad)(struct ib_device *device,
1852 int process_mad_flags,
1854 const struct ib_wc *in_wc,
1855 const struct ib_grh *in_grh,
1856 const struct ib_mad_hdr *in_mad,
1858 struct ib_mad_hdr *out_mad,
1859 size_t *out_mad_size,
1860 u16 *out_mad_pkey_index);
1861 struct ib_xrcd * (*alloc_xrcd)(struct ib_device *device,
1862 struct ib_ucontext *ucontext,
1863 struct ib_udata *udata);
1864 int (*dealloc_xrcd)(struct ib_xrcd *xrcd);
1865 struct ib_flow * (*create_flow)(struct ib_qp *qp,
1869 int (*destroy_flow)(struct ib_flow *flow_id);
1870 int (*check_mr_status)(struct ib_mr *mr, u32 check_mask,
1871 struct ib_mr_status *mr_status);
1872 void (*disassociate_ucontext)(struct ib_ucontext *ibcontext);
1873 void (*drain_rq)(struct ib_qp *qp);
1874 void (*drain_sq)(struct ib_qp *qp);
1875 int (*set_vf_link_state)(struct ib_device *device, int vf, u8 port,
1877 int (*get_vf_config)(struct ib_device *device, int vf, u8 port,
1878 struct ifla_vf_info *ivf);
1879 int (*get_vf_stats)(struct ib_device *device, int vf, u8 port,
1880 struct ifla_vf_stats *stats);
1881 int (*set_vf_guid)(struct ib_device *device, int vf, u8 port, u64 guid,
1884 struct ib_dma_mapping_ops *dma_ops;
1886 struct module *owner;
1888 struct kobject *ports_parent;
1889 struct list_head port_list;
1892 IB_DEV_UNINITIALIZED,
1898 u64 uverbs_cmd_mask;
1899 u64 uverbs_ex_cmd_mask;
1907 struct ib_device_attr attrs;
1910 * The following mandatory functions are used only at device
1911 * registration. Keep functions such as these at the end of this
1912 * structure to avoid cache line misses when accessing struct ib_device
1915 int (*get_port_immutable)(struct ib_device *, u8, struct ib_port_immutable *);
1920 void (*add) (struct ib_device *);
1921 void (*remove)(struct ib_device *, void *client_data);
1923 /* Returns the net_dev belonging to this ib_client and matching the
1925 * @dev: An RDMA device that the net_dev use for communication.
1926 * @port: A physical port number on the RDMA device.
1927 * @pkey: P_Key that the net_dev uses if applicable.
1928 * @gid: A GID that the net_dev uses to communicate.
1929 * @addr: An IP address the net_dev is configured with.
1930 * @client_data: The device's client data set by ib_set_client_data().
1932 * An ib_client that implements a net_dev on top of RDMA devices
1933 * (such as IP over IB) should implement this callback, allowing the
1934 * rdma_cm module to find the right net_dev for a given request.
1936 * The caller is responsible for calling dev_put on the returned
1938 struct net_device *(*get_net_dev_by_params)(
1939 struct ib_device *dev,
1942 const union ib_gid *gid,
1943 const struct sockaddr *addr,
1945 struct list_head list;
1948 struct ib_device *ib_alloc_device(size_t size);
1949 void ib_dealloc_device(struct ib_device *device);
1951 int ib_register_device(struct ib_device *device,
1952 int (*port_callback)(struct ib_device *,
1953 u8, struct kobject *));
1954 void ib_unregister_device(struct ib_device *device);
1956 int ib_register_client (struct ib_client *client);
1957 void ib_unregister_client(struct ib_client *client);
1959 void *ib_get_client_data(struct ib_device *device, struct ib_client *client);
1960 void ib_set_client_data(struct ib_device *device, struct ib_client *client,
1963 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)
1965 return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0;
1968 static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len)
1970 return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0;
1973 static inline bool ib_is_udata_cleared(struct ib_udata *udata,
1977 const void __user *p = udata->inbuf + offset;
1981 if (len > USHRT_MAX)
1984 buf = kmalloc(len, GFP_KERNEL);
1988 if (copy_from_user(buf, p, len))
1991 ret = !memchr_inv(buf, 0, len);
1999 * ib_modify_qp_is_ok - Check that the supplied attribute mask
2000 * contains all required attributes and no attributes not allowed for
2001 * the given QP state transition.
2002 * @cur_state: Current QP state
2003 * @next_state: Next QP state
2005 * @mask: Mask of supplied QP attributes
2006 * @ll : link layer of port
2008 * This function is a helper function that a low-level driver's
2009 * modify_qp method can use to validate the consumer's input. It
2010 * checks that cur_state and next_state are valid QP states, that a
2011 * transition from cur_state to next_state is allowed by the IB spec,
2012 * and that the attribute mask supplied is allowed for the transition.
2014 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
2015 enum ib_qp_type type, enum ib_qp_attr_mask mask,
2016 enum rdma_link_layer ll);
2018 int ib_register_event_handler (struct ib_event_handler *event_handler);
2019 int ib_unregister_event_handler(struct ib_event_handler *event_handler);
2020 void ib_dispatch_event(struct ib_event *event);
2022 int ib_query_port(struct ib_device *device,
2023 u8 port_num, struct ib_port_attr *port_attr);
2025 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
2029 * rdma_cap_ib_switch - Check if the device is IB switch
2030 * @device: Device to check
2032 * Device driver is responsible for setting is_switch bit on
2033 * in ib_device structure at init time.
2035 * Return: true if the device is IB switch.
2037 static inline bool rdma_cap_ib_switch(const struct ib_device *device)
2039 return device->is_switch;
2043 * rdma_start_port - Return the first valid port number for the device
2046 * @device: Device to be checked
2048 * Return start port number
2050 static inline u8 rdma_start_port(const struct ib_device *device)
2052 return rdma_cap_ib_switch(device) ? 0 : 1;
2056 * rdma_end_port - Return the last valid port number for the device
2059 * @device: Device to be checked
2061 * Return last port number
2063 static inline u8 rdma_end_port(const struct ib_device *device)
2065 return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt;
2068 static inline bool rdma_protocol_ib(const struct ib_device *device, u8 port_num)
2070 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IB;
2073 static inline bool rdma_protocol_roce(const struct ib_device *device, u8 port_num)
2075 return device->port_immutable[port_num].core_cap_flags &
2076 (RDMA_CORE_CAP_PROT_ROCE | RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP);
2079 static inline bool rdma_protocol_roce_udp_encap(const struct ib_device *device, u8 port_num)
2081 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
2084 static inline bool rdma_protocol_roce_eth_encap(const struct ib_device *device, u8 port_num)
2086 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_ROCE;
2089 static inline bool rdma_protocol_iwarp(const struct ib_device *device, u8 port_num)
2091 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IWARP;
2094 static inline bool rdma_ib_or_roce(const struct ib_device *device, u8 port_num)
2096 return rdma_protocol_ib(device, port_num) ||
2097 rdma_protocol_roce(device, port_num);
2101 * rdma_cap_ib_mad - Check if the port of a device supports Infiniband
2102 * Management Datagrams.
2103 * @device: Device to check
2104 * @port_num: Port number to check
2106 * Management Datagrams (MAD) are a required part of the InfiniBand
2107 * specification and are supported on all InfiniBand devices. A slightly
2108 * extended version are also supported on OPA interfaces.
2110 * Return: true if the port supports sending/receiving of MAD packets.
2112 static inline bool rdma_cap_ib_mad(const struct ib_device *device, u8 port_num)
2114 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_MAD;
2118 * rdma_cap_opa_mad - Check if the port of device provides support for OPA
2119 * Management Datagrams.
2120 * @device: Device to check
2121 * @port_num: Port number to check
2123 * Intel OmniPath devices extend and/or replace the InfiniBand Management
2124 * datagrams with their own versions. These OPA MADs share many but not all of
2125 * the characteristics of InfiniBand MADs.
2127 * OPA MADs differ in the following ways:
2129 * 1) MADs are variable size up to 2K
2130 * IBTA defined MADs remain fixed at 256 bytes
2131 * 2) OPA SMPs must carry valid PKeys
2132 * 3) OPA SMP packets are a different format
2134 * Return: true if the port supports OPA MAD packet formats.
2136 static inline bool rdma_cap_opa_mad(struct ib_device *device, u8 port_num)
2138 return (device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_OPA_MAD)
2139 == RDMA_CORE_CAP_OPA_MAD;
2143 * rdma_cap_ib_smi - Check if the port of a device provides an Infiniband
2144 * Subnet Management Agent (SMA) on the Subnet Management Interface (SMI).
2145 * @device: Device to check
2146 * @port_num: Port number to check
2148 * Each InfiniBand node is required to provide a Subnet Management Agent
2149 * that the subnet manager can access. Prior to the fabric being fully
2150 * configured by the subnet manager, the SMA is accessed via a well known
2151 * interface called the Subnet Management Interface (SMI). This interface
2152 * uses directed route packets to communicate with the SM to get around the
2153 * chicken and egg problem of the SM needing to know what's on the fabric
2154 * in order to configure the fabric, and needing to configure the fabric in
2155 * order to send packets to the devices on the fabric. These directed
2156 * route packets do not need the fabric fully configured in order to reach
2157 * their destination. The SMI is the only method allowed to send
2158 * directed route packets on an InfiniBand fabric.
2160 * Return: true if the port provides an SMI.
2162 static inline bool rdma_cap_ib_smi(const struct ib_device *device, u8 port_num)
2164 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SMI;
2168 * rdma_cap_ib_cm - Check if the port of device has the capability Infiniband
2169 * Communication Manager.
2170 * @device: Device to check
2171 * @port_num: Port number to check
2173 * The InfiniBand Communication Manager is one of many pre-defined General
2174 * Service Agents (GSA) that are accessed via the General Service
2175 * Interface (GSI). It's role is to facilitate establishment of connections
2176 * between nodes as well as other management related tasks for established
2179 * Return: true if the port supports an IB CM (this does not guarantee that
2180 * a CM is actually running however).
2182 static inline bool rdma_cap_ib_cm(const struct ib_device *device, u8 port_num)
2184 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_CM;
2188 * rdma_cap_iw_cm - Check if the port of device has the capability IWARP
2189 * Communication Manager.
2190 * @device: Device to check
2191 * @port_num: Port number to check
2193 * Similar to above, but specific to iWARP connections which have a different
2194 * managment protocol than InfiniBand.
2196 * Return: true if the port supports an iWARP CM (this does not guarantee that
2197 * a CM is actually running however).
2199 static inline bool rdma_cap_iw_cm(const struct ib_device *device, u8 port_num)
2201 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IW_CM;
2205 * rdma_cap_ib_sa - Check if the port of device has the capability Infiniband
2206 * Subnet Administration.
2207 * @device: Device to check
2208 * @port_num: Port number to check
2210 * An InfiniBand Subnet Administration (SA) service is a pre-defined General
2211 * Service Agent (GSA) provided by the Subnet Manager (SM). On InfiniBand
2212 * fabrics, devices should resolve routes to other hosts by contacting the
2213 * SA to query the proper route.
2215 * Return: true if the port should act as a client to the fabric Subnet
2216 * Administration interface. This does not imply that the SA service is
2219 static inline bool rdma_cap_ib_sa(const struct ib_device *device, u8 port_num)
2221 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SA;
2225 * rdma_cap_ib_mcast - Check if the port of device has the capability Infiniband
2227 * @device: Device to check
2228 * @port_num: Port number to check
2230 * InfiniBand multicast registration is more complex than normal IPv4 or
2231 * IPv6 multicast registration. Each Host Channel Adapter must register
2232 * with the Subnet Manager when it wishes to join a multicast group. It
2233 * should do so only once regardless of how many queue pairs it subscribes
2234 * to this group. And it should leave the group only after all queue pairs
2235 * attached to the group have been detached.
2237 * Return: true if the port must undertake the additional adminstrative
2238 * overhead of registering/unregistering with the SM and tracking of the
2239 * total number of queue pairs attached to the multicast group.
2241 static inline bool rdma_cap_ib_mcast(const struct ib_device *device, u8 port_num)
2243 return rdma_cap_ib_sa(device, port_num);
2247 * rdma_cap_af_ib - Check if the port of device has the capability
2248 * Native Infiniband Address.
2249 * @device: Device to check
2250 * @port_num: Port number to check
2252 * InfiniBand addressing uses a port's GUID + Subnet Prefix to make a default
2253 * GID. RoCE uses a different mechanism, but still generates a GID via
2254 * a prescribed mechanism and port specific data.
2256 * Return: true if the port uses a GID address to identify devices on the
2259 static inline bool rdma_cap_af_ib(const struct ib_device *device, u8 port_num)
2261 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_AF_IB;
2265 * rdma_cap_eth_ah - Check if the port of device has the capability
2266 * Ethernet Address Handle.
2267 * @device: Device to check
2268 * @port_num: Port number to check
2270 * RoCE is InfiniBand over Ethernet, and it uses a well defined technique
2271 * to fabricate GIDs over Ethernet/IP specific addresses native to the
2272 * port. Normally, packet headers are generated by the sending host
2273 * adapter, but when sending connectionless datagrams, we must manually
2274 * inject the proper headers for the fabric we are communicating over.
2276 * Return: true if we are running as a RoCE port and must force the
2277 * addition of a Global Route Header built from our Ethernet Address
2278 * Handle into our header list for connectionless packets.
2280 static inline bool rdma_cap_eth_ah(const struct ib_device *device, u8 port_num)
2282 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_ETH_AH;
2286 * rdma_max_mad_size - Return the max MAD size required by this RDMA Port.
2289 * @port_num: Port number
2291 * This MAD size includes the MAD headers and MAD payload. No other headers
2294 * Return the max MAD size required by the Port. Will return 0 if the port
2295 * does not support MADs
2297 static inline size_t rdma_max_mad_size(const struct ib_device *device, u8 port_num)
2299 return device->port_immutable[port_num].max_mad_size;
2303 * rdma_cap_roce_gid_table - Check if the port of device uses roce_gid_table
2304 * @device: Device to check
2305 * @port_num: Port number to check
2307 * RoCE GID table mechanism manages the various GIDs for a device.
2309 * NOTE: if allocating the port's GID table has failed, this call will still
2310 * return true, but any RoCE GID table API will fail.
2312 * Return: true if the port uses RoCE GID table mechanism in order to manage
2315 static inline bool rdma_cap_roce_gid_table(const struct ib_device *device,
2318 return rdma_protocol_roce(device, port_num) &&
2319 device->add_gid && device->del_gid;
2322 int ib_query_gid(struct ib_device *device,
2323 u8 port_num, int index, union ib_gid *gid,
2324 struct ib_gid_attr *attr);
2326 int ib_set_vf_link_state(struct ib_device *device, int vf, u8 port,
2328 int ib_get_vf_config(struct ib_device *device, int vf, u8 port,
2329 struct ifla_vf_info *info);
2330 int ib_get_vf_stats(struct ib_device *device, int vf, u8 port,
2331 struct ifla_vf_stats *stats);
2332 int ib_set_vf_guid(struct ib_device *device, int vf, u8 port, u64 guid,
2335 int ib_query_pkey(struct ib_device *device,
2336 u8 port_num, u16 index, u16 *pkey);
2338 int ib_modify_device(struct ib_device *device,
2339 int device_modify_mask,
2340 struct ib_device_modify *device_modify);
2342 int ib_modify_port(struct ib_device *device,
2343 u8 port_num, int port_modify_mask,
2344 struct ib_port_modify *port_modify);
2346 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
2347 enum ib_gid_type gid_type, struct net_device *ndev,
2348 u8 *port_num, u16 *index);
2350 int ib_find_pkey(struct ib_device *device,
2351 u8 port_num, u16 pkey, u16 *index);
2353 struct ib_pd *ib_alloc_pd(struct ib_device *device);
2355 void ib_dealloc_pd(struct ib_pd *pd);
2358 * ib_create_ah - Creates an address handle for the given address vector.
2359 * @pd: The protection domain associated with the address handle.
2360 * @ah_attr: The attributes of the address vector.
2362 * The address handle is used to reference a local or global destination
2363 * in all UD QP post sends.
2365 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
2368 * ib_init_ah_from_wc - Initializes address handle attributes from a
2370 * @device: Device on which the received message arrived.
2371 * @port_num: Port on which the received message arrived.
2372 * @wc: Work completion associated with the received message.
2373 * @grh: References the received global route header. This parameter is
2374 * ignored unless the work completion indicates that the GRH is valid.
2375 * @ah_attr: Returned attributes that can be used when creating an address
2376 * handle for replying to the message.
2378 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
2379 const struct ib_wc *wc, const struct ib_grh *grh,
2380 struct ib_ah_attr *ah_attr);
2383 * ib_create_ah_from_wc - Creates an address handle associated with the
2384 * sender of the specified work completion.
2385 * @pd: The protection domain associated with the address handle.
2386 * @wc: Work completion information associated with a received message.
2387 * @grh: References the received global route header. This parameter is
2388 * ignored unless the work completion indicates that the GRH is valid.
2389 * @port_num: The outbound port number to associate with the address.
2391 * The address handle is used to reference a local or global destination
2392 * in all UD QP post sends.
2394 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
2395 const struct ib_grh *grh, u8 port_num);
2398 * ib_modify_ah - Modifies the address vector associated with an address
2400 * @ah: The address handle to modify.
2401 * @ah_attr: The new address vector attributes to associate with the
2404 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
2407 * ib_query_ah - Queries the address vector associated with an address
2409 * @ah: The address handle to query.
2410 * @ah_attr: The address vector attributes associated with the address
2413 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
2416 * ib_destroy_ah - Destroys an address handle.
2417 * @ah: The address handle to destroy.
2419 int ib_destroy_ah(struct ib_ah *ah);
2422 * ib_create_srq - Creates a SRQ associated with the specified protection
2424 * @pd: The protection domain associated with the SRQ.
2425 * @srq_init_attr: A list of initial attributes required to create the
2426 * SRQ. If SRQ creation succeeds, then the attributes are updated to
2427 * the actual capabilities of the created SRQ.
2429 * srq_attr->max_wr and srq_attr->max_sge are read the determine the
2430 * requested size of the SRQ, and set to the actual values allocated
2431 * on return. If ib_create_srq() succeeds, then max_wr and max_sge
2432 * will always be at least as large as the requested values.
2434 struct ib_srq *ib_create_srq(struct ib_pd *pd,
2435 struct ib_srq_init_attr *srq_init_attr);
2438 * ib_modify_srq - Modifies the attributes for the specified SRQ.
2439 * @srq: The SRQ to modify.
2440 * @srq_attr: On input, specifies the SRQ attributes to modify. On output,
2441 * the current values of selected SRQ attributes are returned.
2442 * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ
2443 * are being modified.
2445 * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or
2446 * IB_SRQ_LIMIT to set the SRQ's limit and request notification when
2447 * the number of receives queued drops below the limit.
2449 int ib_modify_srq(struct ib_srq *srq,
2450 struct ib_srq_attr *srq_attr,
2451 enum ib_srq_attr_mask srq_attr_mask);
2454 * ib_query_srq - Returns the attribute list and current values for the
2456 * @srq: The SRQ to query.
2457 * @srq_attr: The attributes of the specified SRQ.
2459 int ib_query_srq(struct ib_srq *srq,
2460 struct ib_srq_attr *srq_attr);
2463 * ib_destroy_srq - Destroys the specified SRQ.
2464 * @srq: The SRQ to destroy.
2466 int ib_destroy_srq(struct ib_srq *srq);
2469 * ib_post_srq_recv - Posts a list of work requests to the specified SRQ.
2470 * @srq: The SRQ to post the work request on.
2471 * @recv_wr: A list of work requests to post on the receive queue.
2472 * @bad_recv_wr: On an immediate failure, this parameter will reference
2473 * the work request that failed to be posted on the QP.
2475 static inline int ib_post_srq_recv(struct ib_srq *srq,
2476 struct ib_recv_wr *recv_wr,
2477 struct ib_recv_wr **bad_recv_wr)
2479 return srq->device->post_srq_recv(srq, recv_wr, bad_recv_wr);
2483 * ib_create_qp - Creates a QP associated with the specified protection
2485 * @pd: The protection domain associated with the QP.
2486 * @qp_init_attr: A list of initial attributes required to create the
2487 * QP. If QP creation succeeds, then the attributes are updated to
2488 * the actual capabilities of the created QP.
2490 struct ib_qp *ib_create_qp(struct ib_pd *pd,
2491 struct ib_qp_init_attr *qp_init_attr);
2494 * ib_modify_qp - Modifies the attributes for the specified QP and then
2495 * transitions the QP to the given state.
2496 * @qp: The QP to modify.
2497 * @qp_attr: On input, specifies the QP attributes to modify. On output,
2498 * the current values of selected QP attributes are returned.
2499 * @qp_attr_mask: A bit-mask used to specify which attributes of the QP
2500 * are being modified.
2502 int ib_modify_qp(struct ib_qp *qp,
2503 struct ib_qp_attr *qp_attr,
2507 * ib_query_qp - Returns the attribute list and current values for the
2509 * @qp: The QP to query.
2510 * @qp_attr: The attributes of the specified QP.
2511 * @qp_attr_mask: A bit-mask used to select specific attributes to query.
2512 * @qp_init_attr: Additional attributes of the selected QP.
2514 * The qp_attr_mask may be used to limit the query to gathering only the
2515 * selected attributes.
2517 int ib_query_qp(struct ib_qp *qp,
2518 struct ib_qp_attr *qp_attr,
2520 struct ib_qp_init_attr *qp_init_attr);
2523 * ib_destroy_qp - Destroys the specified QP.
2524 * @qp: The QP to destroy.
2526 int ib_destroy_qp(struct ib_qp *qp);
2529 * ib_open_qp - Obtain a reference to an existing sharable QP.
2530 * @xrcd - XRC domain
2531 * @qp_open_attr: Attributes identifying the QP to open.
2533 * Returns a reference to a sharable QP.
2535 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
2536 struct ib_qp_open_attr *qp_open_attr);
2539 * ib_close_qp - Release an external reference to a QP.
2540 * @qp: The QP handle to release
2542 * The opened QP handle is released by the caller. The underlying
2543 * shared QP is not destroyed until all internal references are released.
2545 int ib_close_qp(struct ib_qp *qp);
2548 * ib_post_send - Posts a list of work requests to the send queue of
2550 * @qp: The QP to post the work request on.
2551 * @send_wr: A list of work requests to post on the send queue.
2552 * @bad_send_wr: On an immediate failure, this parameter will reference
2553 * the work request that failed to be posted on the QP.
2555 * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate
2556 * error is returned, the QP state shall not be affected,
2557 * ib_post_send() will return an immediate error after queueing any
2558 * earlier work requests in the list.
2560 static inline int ib_post_send(struct ib_qp *qp,
2561 struct ib_send_wr *send_wr,
2562 struct ib_send_wr **bad_send_wr)
2564 return qp->device->post_send(qp, send_wr, bad_send_wr);
2568 * ib_post_recv - Posts a list of work requests to the receive queue of
2570 * @qp: The QP to post the work request on.
2571 * @recv_wr: A list of work requests to post on the receive queue.
2572 * @bad_recv_wr: On an immediate failure, this parameter will reference
2573 * the work request that failed to be posted on the QP.
2575 static inline int ib_post_recv(struct ib_qp *qp,
2576 struct ib_recv_wr *recv_wr,
2577 struct ib_recv_wr **bad_recv_wr)
2579 return qp->device->post_recv(qp, recv_wr, bad_recv_wr);
2582 struct ib_cq *ib_alloc_cq(struct ib_device *dev, void *private,
2583 int nr_cqe, int comp_vector, enum ib_poll_context poll_ctx);
2584 void ib_free_cq(struct ib_cq *cq);
2585 int ib_process_cq_direct(struct ib_cq *cq, int budget);
2588 * ib_create_cq - Creates a CQ on the specified device.
2589 * @device: The device on which to create the CQ.
2590 * @comp_handler: A user-specified callback that is invoked when a
2591 * completion event occurs on the CQ.
2592 * @event_handler: A user-specified callback that is invoked when an
2593 * asynchronous event not associated with a completion occurs on the CQ.
2594 * @cq_context: Context associated with the CQ returned to the user via
2595 * the associated completion and event handlers.
2596 * @cq_attr: The attributes the CQ should be created upon.
2598 * Users can examine the cq structure to determine the actual CQ size.
2600 struct ib_cq *ib_create_cq(struct ib_device *device,
2601 ib_comp_handler comp_handler,
2602 void (*event_handler)(struct ib_event *, void *),
2604 const struct ib_cq_init_attr *cq_attr);
2607 * ib_resize_cq - Modifies the capacity of the CQ.
2608 * @cq: The CQ to resize.
2609 * @cqe: The minimum size of the CQ.
2611 * Users can examine the cq structure to determine the actual CQ size.
2613 int ib_resize_cq(struct ib_cq *cq, int cqe);
2616 * ib_modify_cq - Modifies moderation params of the CQ
2617 * @cq: The CQ to modify.
2618 * @cq_count: number of CQEs that will trigger an event
2619 * @cq_period: max period of time in usec before triggering an event
2622 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
2625 * ib_destroy_cq - Destroys the specified CQ.
2626 * @cq: The CQ to destroy.
2628 int ib_destroy_cq(struct ib_cq *cq);
2631 * ib_poll_cq - poll a CQ for completion(s)
2632 * @cq:the CQ being polled
2633 * @num_entries:maximum number of completions to return
2634 * @wc:array of at least @num_entries &struct ib_wc where completions
2637 * Poll a CQ for (possibly multiple) completions. If the return value
2638 * is < 0, an error occurred. If the return value is >= 0, it is the
2639 * number of completions returned. If the return value is
2640 * non-negative and < num_entries, then the CQ was emptied.
2642 static inline int ib_poll_cq(struct ib_cq *cq, int num_entries,
2645 return cq->device->poll_cq(cq, num_entries, wc);
2649 * ib_peek_cq - Returns the number of unreaped completions currently
2650 * on the specified CQ.
2651 * @cq: The CQ to peek.
2652 * @wc_cnt: A minimum number of unreaped completions to check for.
2654 * If the number of unreaped completions is greater than or equal to wc_cnt,
2655 * this function returns wc_cnt, otherwise, it returns the actual number of
2656 * unreaped completions.
2658 int ib_peek_cq(struct ib_cq *cq, int wc_cnt);
2661 * ib_req_notify_cq - Request completion notification on a CQ.
2662 * @cq: The CQ to generate an event for.
2664 * Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP
2665 * to request an event on the next solicited event or next work
2666 * completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS
2667 * may also be |ed in to request a hint about missed events, as
2671 * < 0 means an error occurred while requesting notification
2672 * == 0 means notification was requested successfully, and if
2673 * IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events
2674 * were missed and it is safe to wait for another event. In
2675 * this case is it guaranteed that any work completions added
2676 * to the CQ since the last CQ poll will trigger a completion
2677 * notification event.
2678 * > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed
2679 * in. It means that the consumer must poll the CQ again to
2680 * make sure it is empty to avoid missing an event because of a
2681 * race between requesting notification and an entry being
2682 * added to the CQ. This return value means it is possible
2683 * (but not guaranteed) that a work completion has been added
2684 * to the CQ since the last poll without triggering a
2685 * completion notification event.
2687 static inline int ib_req_notify_cq(struct ib_cq *cq,
2688 enum ib_cq_notify_flags flags)
2690 return cq->device->req_notify_cq(cq, flags);
2694 * ib_req_ncomp_notif - Request completion notification when there are
2695 * at least the specified number of unreaped completions on the CQ.
2696 * @cq: The CQ to generate an event for.
2697 * @wc_cnt: The number of unreaped completions that should be on the
2698 * CQ before an event is generated.
2700 static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt)
2702 return cq->device->req_ncomp_notif ?
2703 cq->device->req_ncomp_notif(cq, wc_cnt) :
2708 * ib_get_dma_mr - Returns a memory region for system memory that is
2710 * @pd: The protection domain associated with the memory region.
2711 * @mr_access_flags: Specifies the memory access rights.
2713 * Note that the ib_dma_*() functions defined below must be used
2714 * to create/destroy addresses used with the Lkey or Rkey returned
2715 * by ib_get_dma_mr().
2717 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
2720 * ib_dma_mapping_error - check a DMA addr for error
2721 * @dev: The device for which the dma_addr was created
2722 * @dma_addr: The DMA address to check
2724 static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
2727 return dev->dma_ops->mapping_error(dev, dma_addr);
2728 return dma_mapping_error(dev->dma_device, dma_addr);
2732 * ib_dma_map_single - Map a kernel virtual address to DMA address
2733 * @dev: The device for which the dma_addr is to be created
2734 * @cpu_addr: The kernel virtual address
2735 * @size: The size of the region in bytes
2736 * @direction: The direction of the DMA
2738 static inline u64 ib_dma_map_single(struct ib_device *dev,
2739 void *cpu_addr, size_t size,
2740 enum dma_data_direction direction)
2743 return dev->dma_ops->map_single(dev, cpu_addr, size, direction);
2744 return dma_map_single(dev->dma_device, cpu_addr, size, direction);
2748 * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single()
2749 * @dev: The device for which the DMA address was created
2750 * @addr: The DMA address
2751 * @size: The size of the region in bytes
2752 * @direction: The direction of the DMA
2754 static inline void ib_dma_unmap_single(struct ib_device *dev,
2755 u64 addr, size_t size,
2756 enum dma_data_direction direction)
2759 dev->dma_ops->unmap_single(dev, addr, size, direction);
2761 dma_unmap_single(dev->dma_device, addr, size, direction);
2764 static inline u64 ib_dma_map_single_attrs(struct ib_device *dev,
2765 void *cpu_addr, size_t size,
2766 enum dma_data_direction direction,
2767 struct dma_attrs *attrs)
2769 return dma_map_single_attrs(dev->dma_device, cpu_addr, size,
2773 static inline void ib_dma_unmap_single_attrs(struct ib_device *dev,
2774 u64 addr, size_t size,
2775 enum dma_data_direction direction,
2776 struct dma_attrs *attrs)
2778 return dma_unmap_single_attrs(dev->dma_device, addr, size,
2783 * ib_dma_map_page - Map a physical page to DMA address
2784 * @dev: The device for which the dma_addr is to be created
2785 * @page: The page to be mapped
2786 * @offset: The offset within the page
2787 * @size: The size of the region in bytes
2788 * @direction: The direction of the DMA
2790 static inline u64 ib_dma_map_page(struct ib_device *dev,
2792 unsigned long offset,
2794 enum dma_data_direction direction)
2797 return dev->dma_ops->map_page(dev, page, offset, size, direction);
2798 return dma_map_page(dev->dma_device, page, offset, size, direction);
2802 * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page()
2803 * @dev: The device for which the DMA address was created
2804 * @addr: The DMA address
2805 * @size: The size of the region in bytes
2806 * @direction: The direction of the DMA
2808 static inline void ib_dma_unmap_page(struct ib_device *dev,
2809 u64 addr, size_t size,
2810 enum dma_data_direction direction)
2813 dev->dma_ops->unmap_page(dev, addr, size, direction);
2815 dma_unmap_page(dev->dma_device, addr, size, direction);
2819 * ib_dma_map_sg - Map a scatter/gather list to DMA addresses
2820 * @dev: The device for which the DMA addresses are to be created
2821 * @sg: The array of scatter/gather entries
2822 * @nents: The number of scatter/gather entries
2823 * @direction: The direction of the DMA
2825 static inline int ib_dma_map_sg(struct ib_device *dev,
2826 struct scatterlist *sg, int nents,
2827 enum dma_data_direction direction)
2830 return dev->dma_ops->map_sg(dev, sg, nents, direction);
2831 return dma_map_sg(dev->dma_device, sg, nents, direction);
2835 * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses
2836 * @dev: The device for which the DMA addresses were created
2837 * @sg: The array of scatter/gather entries
2838 * @nents: The number of scatter/gather entries
2839 * @direction: The direction of the DMA
2841 static inline void ib_dma_unmap_sg(struct ib_device *dev,
2842 struct scatterlist *sg, int nents,
2843 enum dma_data_direction direction)
2846 dev->dma_ops->unmap_sg(dev, sg, nents, direction);
2848 dma_unmap_sg(dev->dma_device, sg, nents, direction);
2851 static inline int ib_dma_map_sg_attrs(struct ib_device *dev,
2852 struct scatterlist *sg, int nents,
2853 enum dma_data_direction direction,
2854 struct dma_attrs *attrs)
2856 return dma_map_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2859 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
2860 struct scatterlist *sg, int nents,
2861 enum dma_data_direction direction,
2862 struct dma_attrs *attrs)
2864 dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2867 * ib_sg_dma_address - Return the DMA address from a scatter/gather entry
2868 * @dev: The device for which the DMA addresses were created
2869 * @sg: The scatter/gather entry
2871 * Note: this function is obsolete. To do: change all occurrences of
2872 * ib_sg_dma_address() into sg_dma_address().
2874 static inline u64 ib_sg_dma_address(struct ib_device *dev,
2875 struct scatterlist *sg)
2877 return sg_dma_address(sg);
2881 * ib_sg_dma_len - Return the DMA length from a scatter/gather entry
2882 * @dev: The device for which the DMA addresses were created
2883 * @sg: The scatter/gather entry
2885 * Note: this function is obsolete. To do: change all occurrences of
2886 * ib_sg_dma_len() into sg_dma_len().
2888 static inline unsigned int ib_sg_dma_len(struct ib_device *dev,
2889 struct scatterlist *sg)
2891 return sg_dma_len(sg);
2895 * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU
2896 * @dev: The device for which the DMA address was created
2897 * @addr: The DMA address
2898 * @size: The size of the region in bytes
2899 * @dir: The direction of the DMA
2901 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev,
2904 enum dma_data_direction dir)
2907 dev->dma_ops->sync_single_for_cpu(dev, addr, size, dir);
2909 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
2913 * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device
2914 * @dev: The device for which the DMA address was created
2915 * @addr: The DMA address
2916 * @size: The size of the region in bytes
2917 * @dir: The direction of the DMA
2919 static inline void ib_dma_sync_single_for_device(struct ib_device *dev,
2922 enum dma_data_direction dir)
2925 dev->dma_ops->sync_single_for_device(dev, addr, size, dir);
2927 dma_sync_single_for_device(dev->dma_device, addr, size, dir);
2931 * ib_dma_alloc_coherent - Allocate memory and map it for DMA
2932 * @dev: The device for which the DMA address is requested
2933 * @size: The size of the region to allocate in bytes
2934 * @dma_handle: A pointer for returning the DMA address of the region
2935 * @flag: memory allocator flags
2937 static inline void *ib_dma_alloc_coherent(struct ib_device *dev,
2943 return dev->dma_ops->alloc_coherent(dev, size, dma_handle, flag);
2948 ret = dma_alloc_coherent(dev->dma_device, size, &handle, flag);
2949 *dma_handle = handle;
2955 * ib_dma_free_coherent - Free memory allocated by ib_dma_alloc_coherent()
2956 * @dev: The device for which the DMA addresses were allocated
2957 * @size: The size of the region
2958 * @cpu_addr: the address returned by ib_dma_alloc_coherent()
2959 * @dma_handle: the DMA address returned by ib_dma_alloc_coherent()
2961 static inline void ib_dma_free_coherent(struct ib_device *dev,
2962 size_t size, void *cpu_addr,
2966 dev->dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
2968 dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle);
2972 * ib_dereg_mr - Deregisters a memory region and removes it from the
2973 * HCA translation table.
2974 * @mr: The memory region to deregister.
2976 * This function can fail, if the memory region has memory windows bound to it.
2978 int ib_dereg_mr(struct ib_mr *mr);
2980 struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
2981 enum ib_mr_type mr_type,
2985 * ib_update_fast_reg_key - updates the key portion of the fast_reg MR
2987 * @mr - struct ib_mr pointer to be updated.
2988 * @newkey - new key to be used.
2990 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey)
2992 mr->lkey = (mr->lkey & 0xffffff00) | newkey;
2993 mr->rkey = (mr->rkey & 0xffffff00) | newkey;
2997 * ib_inc_rkey - increments the key portion of the given rkey. Can be used
2998 * for calculating a new rkey for type 2 memory windows.
2999 * @rkey - the rkey to increment.
3001 static inline u32 ib_inc_rkey(u32 rkey)
3003 const u32 mask = 0x000000ff;
3004 return ((rkey + 1) & mask) | (rkey & ~mask);
3008 * ib_alloc_fmr - Allocates a unmapped fast memory region.
3009 * @pd: The protection domain associated with the unmapped region.
3010 * @mr_access_flags: Specifies the memory access rights.
3011 * @fmr_attr: Attributes of the unmapped region.
3013 * A fast memory region must be mapped before it can be used as part of
3016 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
3017 int mr_access_flags,
3018 struct ib_fmr_attr *fmr_attr);
3021 * ib_map_phys_fmr - Maps a list of physical pages to a fast memory region.
3022 * @fmr: The fast memory region to associate with the pages.
3023 * @page_list: An array of physical pages to map to the fast memory region.
3024 * @list_len: The number of pages in page_list.
3025 * @iova: The I/O virtual address to use with the mapped region.
3027 static inline int ib_map_phys_fmr(struct ib_fmr *fmr,
3028 u64 *page_list, int list_len,
3031 return fmr->device->map_phys_fmr(fmr, page_list, list_len, iova);
3035 * ib_unmap_fmr - Removes the mapping from a list of fast memory regions.
3036 * @fmr_list: A linked list of fast memory regions to unmap.
3038 int ib_unmap_fmr(struct list_head *fmr_list);
3041 * ib_dealloc_fmr - Deallocates a fast memory region.
3042 * @fmr: The fast memory region to deallocate.
3044 int ib_dealloc_fmr(struct ib_fmr *fmr);
3047 * ib_attach_mcast - Attaches the specified QP to a multicast group.
3048 * @qp: QP to attach to the multicast group. The QP must be type
3050 * @gid: Multicast group GID.
3051 * @lid: Multicast group LID in host byte order.
3053 * In order to send and receive multicast packets, subnet
3054 * administration must have created the multicast group and configured
3055 * the fabric appropriately. The port associated with the specified
3056 * QP must also be a member of the multicast group.
3058 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
3061 * ib_detach_mcast - Detaches the specified QP from a multicast group.
3062 * @qp: QP to detach from the multicast group.
3063 * @gid: Multicast group GID.
3064 * @lid: Multicast group LID in host byte order.
3066 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
3069 * ib_alloc_xrcd - Allocates an XRC domain.
3070 * @device: The device on which to allocate the XRC domain.
3072 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device);
3075 * ib_dealloc_xrcd - Deallocates an XRC domain.
3076 * @xrcd: The XRC domain to deallocate.
3078 int ib_dealloc_xrcd(struct ib_xrcd *xrcd);
3080 struct ib_flow *ib_create_flow(struct ib_qp *qp,
3081 struct ib_flow_attr *flow_attr, int domain);
3082 int ib_destroy_flow(struct ib_flow *flow_id);
3084 static inline int ib_check_mr_access(int flags)
3087 * Local write permission is required if remote write or
3088 * remote atomic permission is also requested.
3090 if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
3091 !(flags & IB_ACCESS_LOCAL_WRITE))
3098 * ib_check_mr_status: lightweight check of MR status.
3099 * This routine may provide status checks on a selected
3100 * ib_mr. first use is for signature status check.
3102 * @mr: A memory region.
3103 * @check_mask: Bitmask of which checks to perform from
3104 * ib_mr_status_check enumeration.
3105 * @mr_status: The container of relevant status checks.
3106 * failed checks will be indicated in the status bitmask
3107 * and the relevant info shall be in the error item.
3109 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
3110 struct ib_mr_status *mr_status);
3112 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port,
3113 u16 pkey, const union ib_gid *gid,
3114 const struct sockaddr *addr);
3116 int ib_map_mr_sg(struct ib_mr *mr,
3117 struct scatterlist *sg,
3119 unsigned int page_size);
3122 ib_map_mr_sg_zbva(struct ib_mr *mr,
3123 struct scatterlist *sg,
3125 unsigned int page_size)
3129 n = ib_map_mr_sg(mr, sg, sg_nents, page_size);
3135 int ib_sg_to_pages(struct ib_mr *mr,
3136 struct scatterlist *sgl,
3138 int (*set_page)(struct ib_mr *, u64));
3140 void ib_drain_rq(struct ib_qp *qp);
3141 void ib_drain_sq(struct ib_qp *qp);
3142 void ib_drain_qp(struct ib_qp *qp);
3143 #endif /* IB_VERBS_H */