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 <uapi/linux/if_ether.h>
54 #include <linux/atomic.h>
55 #include <linux/mmu_notifier.h>
56 #include <asm/uaccess.h>
58 extern struct workqueue_struct *ib_wq;
68 extern union ib_gid zgid;
71 struct net_device *ndev;
75 /* IB values map to NodeInfo:NodeType. */
84 enum rdma_transport_type {
88 RDMA_TRANSPORT_USNIC_UDP
91 enum rdma_protocol_type {
95 RDMA_PROTOCOL_USNIC_UDP
98 __attribute_const__ enum rdma_transport_type
99 rdma_node_get_transport(enum rdma_node_type node_type);
101 enum rdma_link_layer {
102 IB_LINK_LAYER_UNSPECIFIED,
103 IB_LINK_LAYER_INFINIBAND,
104 IB_LINK_LAYER_ETHERNET,
107 enum ib_device_cap_flags {
108 IB_DEVICE_RESIZE_MAX_WR = 1,
109 IB_DEVICE_BAD_PKEY_CNTR = (1<<1),
110 IB_DEVICE_BAD_QKEY_CNTR = (1<<2),
111 IB_DEVICE_RAW_MULTI = (1<<3),
112 IB_DEVICE_AUTO_PATH_MIG = (1<<4),
113 IB_DEVICE_CHANGE_PHY_PORT = (1<<5),
114 IB_DEVICE_UD_AV_PORT_ENFORCE = (1<<6),
115 IB_DEVICE_CURR_QP_STATE_MOD = (1<<7),
116 IB_DEVICE_SHUTDOWN_PORT = (1<<8),
117 IB_DEVICE_INIT_TYPE = (1<<9),
118 IB_DEVICE_PORT_ACTIVE_EVENT = (1<<10),
119 IB_DEVICE_SYS_IMAGE_GUID = (1<<11),
120 IB_DEVICE_RC_RNR_NAK_GEN = (1<<12),
121 IB_DEVICE_SRQ_RESIZE = (1<<13),
122 IB_DEVICE_N_NOTIFY_CQ = (1<<14),
123 IB_DEVICE_LOCAL_DMA_LKEY = (1<<15),
124 IB_DEVICE_RESERVED = (1<<16), /* old SEND_W_INV */
125 IB_DEVICE_MEM_WINDOW = (1<<17),
127 * Devices should set IB_DEVICE_UD_IP_SUM if they support
128 * insertion of UDP and TCP checksum on outgoing UD IPoIB
129 * messages and can verify the validity of checksum for
130 * incoming messages. Setting this flag implies that the
131 * IPoIB driver may set NETIF_F_IP_CSUM for datagram mode.
133 IB_DEVICE_UD_IP_CSUM = (1<<18),
134 IB_DEVICE_UD_TSO = (1<<19),
135 IB_DEVICE_XRC = (1<<20),
136 IB_DEVICE_MEM_MGT_EXTENSIONS = (1<<21),
137 IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22),
138 IB_DEVICE_MEM_WINDOW_TYPE_2A = (1<<23),
139 IB_DEVICE_MEM_WINDOW_TYPE_2B = (1<<24),
140 IB_DEVICE_MANAGED_FLOW_STEERING = (1<<29),
141 IB_DEVICE_SIGNATURE_HANDOVER = (1<<30),
142 IB_DEVICE_ON_DEMAND_PAGING = (1<<31),
145 enum ib_signature_prot_cap {
146 IB_PROT_T10DIF_TYPE_1 = 1,
147 IB_PROT_T10DIF_TYPE_2 = 1 << 1,
148 IB_PROT_T10DIF_TYPE_3 = 1 << 2,
151 enum ib_signature_guard_cap {
152 IB_GUARD_T10DIF_CRC = 1,
153 IB_GUARD_T10DIF_CSUM = 1 << 1,
162 enum ib_odp_general_cap_bits {
163 IB_ODP_SUPPORT = 1 << 0,
166 enum ib_odp_transport_cap_bits {
167 IB_ODP_SUPPORT_SEND = 1 << 0,
168 IB_ODP_SUPPORT_RECV = 1 << 1,
169 IB_ODP_SUPPORT_WRITE = 1 << 2,
170 IB_ODP_SUPPORT_READ = 1 << 3,
171 IB_ODP_SUPPORT_ATOMIC = 1 << 4,
175 uint64_t general_caps;
177 uint32_t rc_odp_caps;
178 uint32_t uc_odp_caps;
179 uint32_t ud_odp_caps;
180 } per_transport_caps;
183 enum ib_cq_creation_flags {
184 IB_CQ_FLAGS_TIMESTAMP_COMPLETION = 1 << 0,
187 struct ib_cq_init_attr {
193 struct ib_device_attr {
195 __be64 sys_image_guid;
203 int device_cap_flags;
213 int max_qp_init_rd_atom;
214 int max_ee_init_rd_atom;
215 enum ib_atomic_cap atomic_cap;
216 enum ib_atomic_cap masked_atomic_cap;
223 int max_mcast_qp_attach;
224 int max_total_mcast_qp_attach;
231 unsigned int max_fast_reg_page_list_len;
233 u8 local_ca_ack_delay;
236 struct ib_odp_caps odp_caps;
237 uint64_t timestamp_mask;
238 uint64_t hca_core_clock; /* in KHZ */
249 static inline int ib_mtu_enum_to_int(enum ib_mtu mtu)
252 case IB_MTU_256: return 256;
253 case IB_MTU_512: return 512;
254 case IB_MTU_1024: return 1024;
255 case IB_MTU_2048: return 2048;
256 case IB_MTU_4096: return 4096;
267 IB_PORT_ACTIVE_DEFER = 5
270 enum ib_port_cap_flags {
272 IB_PORT_NOTICE_SUP = 1 << 2,
273 IB_PORT_TRAP_SUP = 1 << 3,
274 IB_PORT_OPT_IPD_SUP = 1 << 4,
275 IB_PORT_AUTO_MIGR_SUP = 1 << 5,
276 IB_PORT_SL_MAP_SUP = 1 << 6,
277 IB_PORT_MKEY_NVRAM = 1 << 7,
278 IB_PORT_PKEY_NVRAM = 1 << 8,
279 IB_PORT_LED_INFO_SUP = 1 << 9,
280 IB_PORT_SM_DISABLED = 1 << 10,
281 IB_PORT_SYS_IMAGE_GUID_SUP = 1 << 11,
282 IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP = 1 << 12,
283 IB_PORT_EXTENDED_SPEEDS_SUP = 1 << 14,
284 IB_PORT_CM_SUP = 1 << 16,
285 IB_PORT_SNMP_TUNNEL_SUP = 1 << 17,
286 IB_PORT_REINIT_SUP = 1 << 18,
287 IB_PORT_DEVICE_MGMT_SUP = 1 << 19,
288 IB_PORT_VENDOR_CLASS_SUP = 1 << 20,
289 IB_PORT_DR_NOTICE_SUP = 1 << 21,
290 IB_PORT_CAP_MASK_NOTICE_SUP = 1 << 22,
291 IB_PORT_BOOT_MGMT_SUP = 1 << 23,
292 IB_PORT_LINK_LATENCY_SUP = 1 << 24,
293 IB_PORT_CLIENT_REG_SUP = 1 << 25,
294 IB_PORT_IP_BASED_GIDS = 1 << 26,
304 static inline int ib_width_enum_to_int(enum ib_port_width width)
307 case IB_WIDTH_1X: return 1;
308 case IB_WIDTH_4X: return 4;
309 case IB_WIDTH_8X: return 8;
310 case IB_WIDTH_12X: return 12;
324 struct ib_protocol_stats {
328 struct iw_protocol_stats {
331 u64 ipInTooBigErrors;
334 u64 ipInUnknownProtos;
335 u64 ipInTruncatedPkts;
338 u64 ipOutForwDatagrams;
370 union rdma_protocol_stats {
371 struct ib_protocol_stats ib;
372 struct iw_protocol_stats iw;
375 /* Define bits for the various functionality this port needs to be supported by
378 /* Management 0x00000FFF */
379 #define RDMA_CORE_CAP_IB_MAD 0x00000001
380 #define RDMA_CORE_CAP_IB_SMI 0x00000002
381 #define RDMA_CORE_CAP_IB_CM 0x00000004
382 #define RDMA_CORE_CAP_IW_CM 0x00000008
383 #define RDMA_CORE_CAP_IB_SA 0x00000010
384 #define RDMA_CORE_CAP_OPA_MAD 0x00000020
386 /* Address format 0x000FF000 */
387 #define RDMA_CORE_CAP_AF_IB 0x00001000
388 #define RDMA_CORE_CAP_ETH_AH 0x00002000
390 /* Protocol 0xFFF00000 */
391 #define RDMA_CORE_CAP_PROT_IB 0x00100000
392 #define RDMA_CORE_CAP_PROT_ROCE 0x00200000
393 #define RDMA_CORE_CAP_PROT_IWARP 0x00400000
395 #define RDMA_CORE_PORT_IBA_IB (RDMA_CORE_CAP_PROT_IB \
396 | RDMA_CORE_CAP_IB_MAD \
397 | RDMA_CORE_CAP_IB_SMI \
398 | RDMA_CORE_CAP_IB_CM \
399 | RDMA_CORE_CAP_IB_SA \
400 | RDMA_CORE_CAP_AF_IB)
401 #define RDMA_CORE_PORT_IBA_ROCE (RDMA_CORE_CAP_PROT_ROCE \
402 | RDMA_CORE_CAP_IB_MAD \
403 | RDMA_CORE_CAP_IB_CM \
404 | RDMA_CORE_CAP_AF_IB \
405 | RDMA_CORE_CAP_ETH_AH)
406 #define RDMA_CORE_PORT_IWARP (RDMA_CORE_CAP_PROT_IWARP \
407 | RDMA_CORE_CAP_IW_CM)
408 #define RDMA_CORE_PORT_INTEL_OPA (RDMA_CORE_PORT_IBA_IB \
409 | RDMA_CORE_CAP_OPA_MAD)
411 struct ib_port_attr {
412 enum ib_port_state state;
414 enum ib_mtu active_mtu;
433 enum ib_device_modify_flags {
434 IB_DEVICE_MODIFY_SYS_IMAGE_GUID = 1 << 0,
435 IB_DEVICE_MODIFY_NODE_DESC = 1 << 1
438 struct ib_device_modify {
443 enum ib_port_modify_flags {
444 IB_PORT_SHUTDOWN = 1,
445 IB_PORT_INIT_TYPE = (1<<2),
446 IB_PORT_RESET_QKEY_CNTR = (1<<3)
449 struct ib_port_modify {
450 u32 set_port_cap_mask;
451 u32 clr_port_cap_mask;
459 IB_EVENT_QP_ACCESS_ERR,
463 IB_EVENT_PATH_MIG_ERR,
464 IB_EVENT_DEVICE_FATAL,
465 IB_EVENT_PORT_ACTIVE,
468 IB_EVENT_PKEY_CHANGE,
471 IB_EVENT_SRQ_LIMIT_REACHED,
472 IB_EVENT_QP_LAST_WQE_REACHED,
473 IB_EVENT_CLIENT_REREGISTER,
477 __attribute_const__ const char *ib_event_msg(enum ib_event_type event);
480 struct ib_device *device;
487 enum ib_event_type event;
490 struct ib_event_handler {
491 struct ib_device *device;
492 void (*handler)(struct ib_event_handler *, struct ib_event *);
493 struct list_head list;
496 #define INIT_IB_EVENT_HANDLER(_ptr, _device, _handler) \
498 (_ptr)->device = _device; \
499 (_ptr)->handler = _handler; \
500 INIT_LIST_HEAD(&(_ptr)->list); \
503 struct ib_global_route {
512 __be32 version_tclass_flow;
521 IB_MULTICAST_QPN = 0xffffff
524 #define IB_LID_PERMISSIVE cpu_to_be16(0xFFFF)
531 IB_RATE_PORT_CURRENT = 0,
532 IB_RATE_2_5_GBPS = 2,
540 IB_RATE_120_GBPS = 10,
541 IB_RATE_14_GBPS = 11,
542 IB_RATE_56_GBPS = 12,
543 IB_RATE_112_GBPS = 13,
544 IB_RATE_168_GBPS = 14,
545 IB_RATE_25_GBPS = 15,
546 IB_RATE_100_GBPS = 16,
547 IB_RATE_200_GBPS = 17,
548 IB_RATE_300_GBPS = 18
552 * ib_rate_to_mult - Convert the IB rate enum to a multiple of the
553 * base rate of 2.5 Gbit/sec. For example, IB_RATE_5_GBPS will be
554 * converted to 2, since 5 Gbit/sec is 2 * 2.5 Gbit/sec.
555 * @rate: rate to convert.
557 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate);
560 * ib_rate_to_mbps - Convert the IB rate enum to Mbps.
561 * For example, IB_RATE_2_5_GBPS will be converted to 2500.
562 * @rate: rate to convert.
564 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate);
568 * enum ib_mr_type - memory region type
569 * @IB_MR_TYPE_MEM_REG: memory region that is used for
570 * normal registration
571 * @IB_MR_TYPE_SIGNATURE: memory region that is used for
572 * signature operations (data-integrity
577 IB_MR_TYPE_SIGNATURE,
582 * IB_SIG_TYPE_NONE: Unprotected.
583 * IB_SIG_TYPE_T10_DIF: Type T10-DIF
585 enum ib_signature_type {
591 * Signature T10-DIF block-guard types
592 * IB_T10DIF_CRC: Corresponds to T10-PI mandated CRC checksum rules.
593 * IB_T10DIF_CSUM: Corresponds to IP checksum rules.
595 enum ib_t10_dif_bg_type {
601 * struct ib_t10_dif_domain - Parameters specific for T10-DIF
603 * @bg_type: T10-DIF block guard type (CRC|CSUM)
604 * @pi_interval: protection information interval.
605 * @bg: seed of guard computation.
606 * @app_tag: application tag of guard block
607 * @ref_tag: initial guard block reference tag.
608 * @ref_remap: Indicate wethear the reftag increments each block
609 * @app_escape: Indicate to skip block check if apptag=0xffff
610 * @ref_escape: Indicate to skip block check if reftag=0xffffffff
611 * @apptag_check_mask: check bitmask of application tag.
613 struct ib_t10_dif_domain {
614 enum ib_t10_dif_bg_type bg_type;
622 u16 apptag_check_mask;
626 * struct ib_sig_domain - Parameters for signature domain
627 * @sig_type: specific signauture type
628 * @sig: union of all signature domain attributes that may
629 * be used to set domain layout.
631 struct ib_sig_domain {
632 enum ib_signature_type sig_type;
634 struct ib_t10_dif_domain dif;
639 * struct ib_sig_attrs - Parameters for signature handover operation
640 * @check_mask: bitmask for signature byte check (8 bytes)
641 * @mem: memory domain layout desciptor.
642 * @wire: wire domain layout desciptor.
644 struct ib_sig_attrs {
646 struct ib_sig_domain mem;
647 struct ib_sig_domain wire;
650 enum ib_sig_err_type {
657 * struct ib_sig_err - signature error descriptor
660 enum ib_sig_err_type err_type;
667 enum ib_mr_status_check {
668 IB_MR_CHECK_SIG_STATUS = 1,
672 * struct ib_mr_status - Memory region status container
674 * @fail_status: Bitmask of MR checks status. For each
675 * failed check a corresponding status bit is set.
676 * @sig_err: Additional info for IB_MR_CEHCK_SIG_STATUS
679 struct ib_mr_status {
681 struct ib_sig_err sig_err;
685 * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
687 * @mult: multiple to convert.
689 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult);
692 struct ib_global_route grh;
707 IB_WC_LOC_EEC_OP_ERR,
712 IB_WC_LOC_ACCESS_ERR,
713 IB_WC_REM_INV_REQ_ERR,
714 IB_WC_REM_ACCESS_ERR,
717 IB_WC_RNR_RETRY_EXC_ERR,
718 IB_WC_LOC_RDD_VIOL_ERR,
719 IB_WC_REM_INV_RD_REQ_ERR,
722 IB_WC_INV_EEC_STATE_ERR,
724 IB_WC_RESP_TIMEOUT_ERR,
728 __attribute_const__ const char *ib_wc_status_msg(enum ib_wc_status status);
740 IB_WC_MASKED_COMP_SWAP,
741 IB_WC_MASKED_FETCH_ADD,
743 * Set value of IB_WC_RECV so consumers can test if a completion is a
744 * receive by testing (opcode & IB_WC_RECV).
747 IB_WC_RECV_RDMA_WITH_IMM
752 IB_WC_WITH_IMM = (1<<1),
753 IB_WC_WITH_INVALIDATE = (1<<2),
754 IB_WC_IP_CSUM_OK = (1<<3),
755 IB_WC_WITH_SMAC = (1<<4),
756 IB_WC_WITH_VLAN = (1<<5),
761 enum ib_wc_status status;
762 enum ib_wc_opcode opcode;
776 u8 port_num; /* valid only for DR SMPs on switches */
781 enum ib_cq_notify_flags {
782 IB_CQ_SOLICITED = 1 << 0,
783 IB_CQ_NEXT_COMP = 1 << 1,
784 IB_CQ_SOLICITED_MASK = IB_CQ_SOLICITED | IB_CQ_NEXT_COMP,
785 IB_CQ_REPORT_MISSED_EVENTS = 1 << 2,
793 enum ib_srq_attr_mask {
794 IB_SRQ_MAX_WR = 1 << 0,
795 IB_SRQ_LIMIT = 1 << 1,
804 struct ib_srq_init_attr {
805 void (*event_handler)(struct ib_event *, void *);
807 struct ib_srq_attr attr;
808 enum ib_srq_type srq_type;
812 struct ib_xrcd *xrcd;
833 * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries
834 * here (and in that order) since the MAD layer uses them as
835 * indices into a 2-entry table.
844 IB_QPT_RAW_ETHERTYPE,
845 IB_QPT_RAW_PACKET = 8,
849 /* Reserve a range for qp types internal to the low level driver.
850 * These qp types will not be visible at the IB core layer, so the
851 * IB_QPT_MAX usages should not be affected in the core layer
853 IB_QPT_RESERVED1 = 0x1000,
865 enum ib_qp_create_flags {
866 IB_QP_CREATE_IPOIB_UD_LSO = 1 << 0,
867 IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK = 1 << 1,
868 IB_QP_CREATE_NETIF_QP = 1 << 5,
869 IB_QP_CREATE_SIGNATURE_EN = 1 << 6,
870 IB_QP_CREATE_USE_GFP_NOIO = 1 << 7,
871 /* reserve bits 26-31 for low level drivers' internal use */
872 IB_QP_CREATE_RESERVED_START = 1 << 26,
873 IB_QP_CREATE_RESERVED_END = 1 << 31,
878 * Note: users may not call ib_close_qp or ib_destroy_qp from the event_handler
879 * callback to destroy the passed in QP.
882 struct ib_qp_init_attr {
883 void (*event_handler)(struct ib_event *, void *);
885 struct ib_cq *send_cq;
886 struct ib_cq *recv_cq;
888 struct ib_xrcd *xrcd; /* XRC TGT QPs only */
889 struct ib_qp_cap cap;
890 enum ib_sig_type sq_sig_type;
891 enum ib_qp_type qp_type;
892 enum ib_qp_create_flags create_flags;
893 u8 port_num; /* special QP types only */
896 struct ib_qp_open_attr {
897 void (*event_handler)(struct ib_event *, void *);
900 enum ib_qp_type qp_type;
903 enum ib_rnr_timeout {
904 IB_RNR_TIMER_655_36 = 0,
905 IB_RNR_TIMER_000_01 = 1,
906 IB_RNR_TIMER_000_02 = 2,
907 IB_RNR_TIMER_000_03 = 3,
908 IB_RNR_TIMER_000_04 = 4,
909 IB_RNR_TIMER_000_06 = 5,
910 IB_RNR_TIMER_000_08 = 6,
911 IB_RNR_TIMER_000_12 = 7,
912 IB_RNR_TIMER_000_16 = 8,
913 IB_RNR_TIMER_000_24 = 9,
914 IB_RNR_TIMER_000_32 = 10,
915 IB_RNR_TIMER_000_48 = 11,
916 IB_RNR_TIMER_000_64 = 12,
917 IB_RNR_TIMER_000_96 = 13,
918 IB_RNR_TIMER_001_28 = 14,
919 IB_RNR_TIMER_001_92 = 15,
920 IB_RNR_TIMER_002_56 = 16,
921 IB_RNR_TIMER_003_84 = 17,
922 IB_RNR_TIMER_005_12 = 18,
923 IB_RNR_TIMER_007_68 = 19,
924 IB_RNR_TIMER_010_24 = 20,
925 IB_RNR_TIMER_015_36 = 21,
926 IB_RNR_TIMER_020_48 = 22,
927 IB_RNR_TIMER_030_72 = 23,
928 IB_RNR_TIMER_040_96 = 24,
929 IB_RNR_TIMER_061_44 = 25,
930 IB_RNR_TIMER_081_92 = 26,
931 IB_RNR_TIMER_122_88 = 27,
932 IB_RNR_TIMER_163_84 = 28,
933 IB_RNR_TIMER_245_76 = 29,
934 IB_RNR_TIMER_327_68 = 30,
935 IB_RNR_TIMER_491_52 = 31
938 enum ib_qp_attr_mask {
940 IB_QP_CUR_STATE = (1<<1),
941 IB_QP_EN_SQD_ASYNC_NOTIFY = (1<<2),
942 IB_QP_ACCESS_FLAGS = (1<<3),
943 IB_QP_PKEY_INDEX = (1<<4),
947 IB_QP_PATH_MTU = (1<<8),
948 IB_QP_TIMEOUT = (1<<9),
949 IB_QP_RETRY_CNT = (1<<10),
950 IB_QP_RNR_RETRY = (1<<11),
951 IB_QP_RQ_PSN = (1<<12),
952 IB_QP_MAX_QP_RD_ATOMIC = (1<<13),
953 IB_QP_ALT_PATH = (1<<14),
954 IB_QP_MIN_RNR_TIMER = (1<<15),
955 IB_QP_SQ_PSN = (1<<16),
956 IB_QP_MAX_DEST_RD_ATOMIC = (1<<17),
957 IB_QP_PATH_MIG_STATE = (1<<18),
959 IB_QP_DEST_QPN = (1<<20),
960 IB_QP_SMAC = (1<<21),
961 IB_QP_ALT_SMAC = (1<<22),
963 IB_QP_ALT_VID = (1<<24),
988 enum ib_qp_state qp_state;
989 enum ib_qp_state cur_qp_state;
990 enum ib_mtu path_mtu;
991 enum ib_mig_state path_mig_state;
997 struct ib_qp_cap cap;
998 struct ib_ah_attr ah_attr;
999 struct ib_ah_attr alt_ah_attr;
1002 u8 en_sqd_async_notify;
1005 u8 max_dest_rd_atomic;
1014 u8 alt_smac[ETH_ALEN];
1021 IB_WR_RDMA_WRITE_WITH_IMM,
1023 IB_WR_SEND_WITH_IMM,
1025 IB_WR_ATOMIC_CMP_AND_SWP,
1026 IB_WR_ATOMIC_FETCH_AND_ADD,
1028 IB_WR_SEND_WITH_INV,
1029 IB_WR_RDMA_READ_WITH_INV,
1032 IB_WR_MASKED_ATOMIC_CMP_AND_SWP,
1033 IB_WR_MASKED_ATOMIC_FETCH_AND_ADD,
1036 /* reserve values for low level drivers' internal use.
1037 * These values will not be used at all in the ib core layer.
1039 IB_WR_RESERVED1 = 0xf0,
1051 enum ib_send_flags {
1053 IB_SEND_SIGNALED = (1<<1),
1054 IB_SEND_SOLICITED = (1<<2),
1055 IB_SEND_INLINE = (1<<3),
1056 IB_SEND_IP_CSUM = (1<<4),
1058 /* reserve bits 26-31 for low level drivers' internal use */
1059 IB_SEND_RESERVED_START = (1 << 26),
1060 IB_SEND_RESERVED_END = (1 << 31),
1069 struct ib_fast_reg_page_list {
1070 struct ib_device *device;
1072 unsigned int max_page_list_len;
1076 * struct ib_mw_bind_info - Parameters for a memory window bind operation.
1077 * @mr: A memory region to bind the memory window to.
1078 * @addr: The address where the memory window should begin.
1079 * @length: The length of the memory window, in bytes.
1080 * @mw_access_flags: Access flags from enum ib_access_flags for the window.
1082 * This struct contains the shared parameters for type 1 and type 2
1083 * memory window bind operations.
1085 struct ib_mw_bind_info {
1089 int mw_access_flags;
1093 struct ib_send_wr *next;
1095 struct ib_sge *sg_list;
1097 enum ib_wr_opcode opcode;
1101 u32 invalidate_rkey;
1112 u64 compare_add_mask;
1123 u16 pkey_index; /* valid for GSI only */
1124 u8 port_num; /* valid for DR SMPs on switch only */
1128 struct ib_fast_reg_page_list *page_list;
1129 unsigned int page_shift;
1130 unsigned int page_list_len;
1137 /* The new rkey for the memory window. */
1139 struct ib_mw_bind_info bind_info;
1142 struct ib_sig_attrs *sig_attrs;
1143 struct ib_mr *sig_mr;
1145 struct ib_sge *prot;
1148 u32 xrc_remote_srq_num; /* XRC TGT QPs only */
1152 struct ib_recv_wr *next;
1154 struct ib_sge *sg_list;
1158 enum ib_access_flags {
1159 IB_ACCESS_LOCAL_WRITE = 1,
1160 IB_ACCESS_REMOTE_WRITE = (1<<1),
1161 IB_ACCESS_REMOTE_READ = (1<<2),
1162 IB_ACCESS_REMOTE_ATOMIC = (1<<3),
1163 IB_ACCESS_MW_BIND = (1<<4),
1164 IB_ZERO_BASED = (1<<5),
1165 IB_ACCESS_ON_DEMAND = (1<<6),
1168 struct ib_phys_buf {
1175 u64 device_virt_addr;
1177 int mr_access_flags;
1182 enum ib_mr_rereg_flags {
1183 IB_MR_REREG_TRANS = 1,
1184 IB_MR_REREG_PD = (1<<1),
1185 IB_MR_REREG_ACCESS = (1<<2),
1186 IB_MR_REREG_SUPPORTED = ((IB_MR_REREG_ACCESS << 1) - 1)
1190 * struct ib_mw_bind - Parameters for a type 1 memory window bind operation.
1191 * @wr_id: Work request id.
1192 * @send_flags: Flags from ib_send_flags enum.
1193 * @bind_info: More parameters of the bind operation.
1198 struct ib_mw_bind_info bind_info;
1201 struct ib_fmr_attr {
1209 struct ib_ucontext {
1210 struct ib_device *device;
1211 struct list_head pd_list;
1212 struct list_head mr_list;
1213 struct list_head mw_list;
1214 struct list_head cq_list;
1215 struct list_head qp_list;
1216 struct list_head srq_list;
1217 struct list_head ah_list;
1218 struct list_head xrcd_list;
1219 struct list_head rule_list;
1223 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
1224 struct rb_root umem_tree;
1226 * Protects .umem_rbroot and tree, as well as odp_mrs_count and
1227 * mmu notifiers registration.
1229 struct rw_semaphore umem_rwsem;
1230 void (*invalidate_range)(struct ib_umem *umem,
1231 unsigned long start, unsigned long end);
1233 struct mmu_notifier mn;
1234 atomic_t notifier_count;
1235 /* A list of umems that don't have private mmu notifier counters yet. */
1236 struct list_head no_private_counters;
1242 u64 user_handle; /* handle given to us by userspace */
1243 struct ib_ucontext *context; /* associated user context */
1244 void *object; /* containing object */
1245 struct list_head list; /* link to context's list */
1246 int id; /* index into kernel idr */
1248 struct rw_semaphore mutex; /* protects .live */
1253 const void __user *inbuf;
1254 void __user *outbuf;
1261 struct ib_device *device;
1262 struct ib_uobject *uobject;
1263 atomic_t usecnt; /* count all resources */
1264 struct ib_mr *local_mr;
1268 struct ib_device *device;
1269 atomic_t usecnt; /* count all exposed resources */
1270 struct inode *inode;
1272 struct mutex tgt_qp_mutex;
1273 struct list_head tgt_qp_list;
1277 struct ib_device *device;
1279 struct ib_uobject *uobject;
1282 typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context);
1285 struct ib_device *device;
1286 struct ib_uobject *uobject;
1287 ib_comp_handler comp_handler;
1288 void (*event_handler)(struct ib_event *, void *);
1291 atomic_t usecnt; /* count number of work queues */
1295 struct ib_device *device;
1297 struct ib_uobject *uobject;
1298 void (*event_handler)(struct ib_event *, void *);
1300 enum ib_srq_type srq_type;
1305 struct ib_xrcd *xrcd;
1313 struct ib_device *device;
1315 struct ib_cq *send_cq;
1316 struct ib_cq *recv_cq;
1318 struct ib_xrcd *xrcd; /* XRC TGT QPs only */
1319 struct list_head xrcd_list;
1320 /* count times opened, mcast attaches, flow attaches */
1322 struct list_head open_list;
1323 struct ib_qp *real_qp;
1324 struct ib_uobject *uobject;
1325 void (*event_handler)(struct ib_event *, void *);
1328 enum ib_qp_type qp_type;
1332 struct ib_device *device;
1334 struct ib_uobject *uobject;
1337 atomic_t usecnt; /* count number of MWs */
1341 struct ib_device *device;
1343 struct ib_uobject *uobject;
1345 enum ib_mw_type type;
1349 struct ib_device *device;
1351 struct list_head list;
1356 /* Supported steering options */
1357 enum ib_flow_attr_type {
1358 /* steering according to rule specifications */
1359 IB_FLOW_ATTR_NORMAL = 0x0,
1360 /* default unicast and multicast rule -
1361 * receive all Eth traffic which isn't steered to any QP
1363 IB_FLOW_ATTR_ALL_DEFAULT = 0x1,
1364 /* default multicast rule -
1365 * receive all Eth multicast traffic which isn't steered to any QP
1367 IB_FLOW_ATTR_MC_DEFAULT = 0x2,
1368 /* sniffer rule - receive all port traffic */
1369 IB_FLOW_ATTR_SNIFFER = 0x3
1372 /* Supported steering header types */
1373 enum ib_flow_spec_type {
1375 IB_FLOW_SPEC_ETH = 0x20,
1376 IB_FLOW_SPEC_IB = 0x22,
1378 IB_FLOW_SPEC_IPV4 = 0x30,
1380 IB_FLOW_SPEC_TCP = 0x40,
1381 IB_FLOW_SPEC_UDP = 0x41
1383 #define IB_FLOW_SPEC_LAYER_MASK 0xF0
1384 #define IB_FLOW_SPEC_SUPPORT_LAYERS 4
1386 /* Flow steering rule priority is set according to it's domain.
1387 * Lower domain value means higher priority.
1389 enum ib_flow_domain {
1390 IB_FLOW_DOMAIN_USER,
1391 IB_FLOW_DOMAIN_ETHTOOL,
1394 IB_FLOW_DOMAIN_NUM /* Must be last */
1397 struct ib_flow_eth_filter {
1404 struct ib_flow_spec_eth {
1405 enum ib_flow_spec_type type;
1407 struct ib_flow_eth_filter val;
1408 struct ib_flow_eth_filter mask;
1411 struct ib_flow_ib_filter {
1416 struct ib_flow_spec_ib {
1417 enum ib_flow_spec_type type;
1419 struct ib_flow_ib_filter val;
1420 struct ib_flow_ib_filter mask;
1423 struct ib_flow_ipv4_filter {
1428 struct ib_flow_spec_ipv4 {
1429 enum ib_flow_spec_type type;
1431 struct ib_flow_ipv4_filter val;
1432 struct ib_flow_ipv4_filter mask;
1435 struct ib_flow_tcp_udp_filter {
1440 struct ib_flow_spec_tcp_udp {
1441 enum ib_flow_spec_type type;
1443 struct ib_flow_tcp_udp_filter val;
1444 struct ib_flow_tcp_udp_filter mask;
1447 union ib_flow_spec {
1449 enum ib_flow_spec_type type;
1452 struct ib_flow_spec_eth eth;
1453 struct ib_flow_spec_ib ib;
1454 struct ib_flow_spec_ipv4 ipv4;
1455 struct ib_flow_spec_tcp_udp tcp_udp;
1458 struct ib_flow_attr {
1459 enum ib_flow_attr_type type;
1465 /* Following are the optional layers according to user request
1466 * struct ib_flow_spec_xxx
1467 * struct ib_flow_spec_yyy
1473 struct ib_uobject *uobject;
1479 enum ib_process_mad_flags {
1480 IB_MAD_IGNORE_MKEY = 1,
1481 IB_MAD_IGNORE_BKEY = 2,
1482 IB_MAD_IGNORE_ALL = IB_MAD_IGNORE_MKEY | IB_MAD_IGNORE_BKEY
1485 enum ib_mad_result {
1486 IB_MAD_RESULT_FAILURE = 0, /* (!SUCCESS is the important flag) */
1487 IB_MAD_RESULT_SUCCESS = 1 << 0, /* MAD was successfully processed */
1488 IB_MAD_RESULT_REPLY = 1 << 1, /* Reply packet needs to be sent */
1489 IB_MAD_RESULT_CONSUMED = 1 << 2 /* Packet consumed: stop processing */
1492 #define IB_DEVICE_NAME_MAX 64
1496 struct ib_event_handler event_handler;
1497 struct ib_pkey_cache **pkey_cache;
1498 struct ib_gid_table **gid_cache;
1502 struct ib_dma_mapping_ops {
1503 int (*mapping_error)(struct ib_device *dev,
1505 u64 (*map_single)(struct ib_device *dev,
1506 void *ptr, size_t size,
1507 enum dma_data_direction direction);
1508 void (*unmap_single)(struct ib_device *dev,
1509 u64 addr, size_t size,
1510 enum dma_data_direction direction);
1511 u64 (*map_page)(struct ib_device *dev,
1512 struct page *page, unsigned long offset,
1514 enum dma_data_direction direction);
1515 void (*unmap_page)(struct ib_device *dev,
1516 u64 addr, size_t size,
1517 enum dma_data_direction direction);
1518 int (*map_sg)(struct ib_device *dev,
1519 struct scatterlist *sg, int nents,
1520 enum dma_data_direction direction);
1521 void (*unmap_sg)(struct ib_device *dev,
1522 struct scatterlist *sg, int nents,
1523 enum dma_data_direction direction);
1524 void (*sync_single_for_cpu)(struct ib_device *dev,
1527 enum dma_data_direction dir);
1528 void (*sync_single_for_device)(struct ib_device *dev,
1531 enum dma_data_direction dir);
1532 void *(*alloc_coherent)(struct ib_device *dev,
1536 void (*free_coherent)(struct ib_device *dev,
1537 size_t size, void *cpu_addr,
1543 struct ib_port_immutable {
1551 struct device *dma_device;
1553 char name[IB_DEVICE_NAME_MAX];
1555 struct list_head event_handler_list;
1556 spinlock_t event_handler_lock;
1558 spinlock_t client_data_lock;
1559 struct list_head core_list;
1560 /* Access to the client_data_list is protected by the client_data_lock
1561 * spinlock and the lists_rwsem read-write semaphore */
1562 struct list_head client_data_list;
1564 struct ib_cache cache;
1566 * port_immutable is indexed by port number
1568 struct ib_port_immutable *port_immutable;
1570 int num_comp_vectors;
1572 struct iw_cm_verbs *iwcm;
1574 int (*get_protocol_stats)(struct ib_device *device,
1575 union rdma_protocol_stats *stats);
1576 int (*query_device)(struct ib_device *device,
1577 struct ib_device_attr *device_attr,
1578 struct ib_udata *udata);
1579 int (*query_port)(struct ib_device *device,
1581 struct ib_port_attr *port_attr);
1582 enum rdma_link_layer (*get_link_layer)(struct ib_device *device,
1584 /* When calling get_netdev, the HW vendor's driver should return the
1585 * net device of device @device at port @port_num or NULL if such
1586 * a net device doesn't exist. The vendor driver should call dev_hold
1587 * on this net device. The HW vendor's device driver must guarantee
1588 * that this function returns NULL before the net device reaches
1589 * NETDEV_UNREGISTER_FINAL state.
1591 struct net_device *(*get_netdev)(struct ib_device *device,
1593 int (*query_gid)(struct ib_device *device,
1594 u8 port_num, int index,
1596 /* When calling add_gid, the HW vendor's driver should
1597 * add the gid of device @device at gid index @index of
1598 * port @port_num to be @gid. Meta-info of that gid (for example,
1599 * the network device related to this gid is available
1600 * at @attr. @context allows the HW vendor driver to store extra
1601 * information together with a GID entry. The HW vendor may allocate
1602 * memory to contain this information and store it in @context when a
1603 * new GID entry is written to. Params are consistent until the next
1604 * call of add_gid or delete_gid. The function should return 0 on
1605 * success or error otherwise. The function could be called
1606 * concurrently for different ports. This function is only called
1607 * when roce_gid_table is used.
1609 int (*add_gid)(struct ib_device *device,
1612 const union ib_gid *gid,
1613 const struct ib_gid_attr *attr,
1615 /* When calling del_gid, the HW vendor's driver should delete the
1616 * gid of device @device at gid index @index of port @port_num.
1617 * Upon the deletion of a GID entry, the HW vendor must free any
1618 * allocated memory. The caller will clear @context afterwards.
1619 * This function is only called when roce_gid_table is used.
1621 int (*del_gid)(struct ib_device *device,
1625 int (*query_pkey)(struct ib_device *device,
1626 u8 port_num, u16 index, u16 *pkey);
1627 int (*modify_device)(struct ib_device *device,
1628 int device_modify_mask,
1629 struct ib_device_modify *device_modify);
1630 int (*modify_port)(struct ib_device *device,
1631 u8 port_num, int port_modify_mask,
1632 struct ib_port_modify *port_modify);
1633 struct ib_ucontext * (*alloc_ucontext)(struct ib_device *device,
1634 struct ib_udata *udata);
1635 int (*dealloc_ucontext)(struct ib_ucontext *context);
1636 int (*mmap)(struct ib_ucontext *context,
1637 struct vm_area_struct *vma);
1638 struct ib_pd * (*alloc_pd)(struct ib_device *device,
1639 struct ib_ucontext *context,
1640 struct ib_udata *udata);
1641 int (*dealloc_pd)(struct ib_pd *pd);
1642 struct ib_ah * (*create_ah)(struct ib_pd *pd,
1643 struct ib_ah_attr *ah_attr);
1644 int (*modify_ah)(struct ib_ah *ah,
1645 struct ib_ah_attr *ah_attr);
1646 int (*query_ah)(struct ib_ah *ah,
1647 struct ib_ah_attr *ah_attr);
1648 int (*destroy_ah)(struct ib_ah *ah);
1649 struct ib_srq * (*create_srq)(struct ib_pd *pd,
1650 struct ib_srq_init_attr *srq_init_attr,
1651 struct ib_udata *udata);
1652 int (*modify_srq)(struct ib_srq *srq,
1653 struct ib_srq_attr *srq_attr,
1654 enum ib_srq_attr_mask srq_attr_mask,
1655 struct ib_udata *udata);
1656 int (*query_srq)(struct ib_srq *srq,
1657 struct ib_srq_attr *srq_attr);
1658 int (*destroy_srq)(struct ib_srq *srq);
1659 int (*post_srq_recv)(struct ib_srq *srq,
1660 struct ib_recv_wr *recv_wr,
1661 struct ib_recv_wr **bad_recv_wr);
1662 struct ib_qp * (*create_qp)(struct ib_pd *pd,
1663 struct ib_qp_init_attr *qp_init_attr,
1664 struct ib_udata *udata);
1665 int (*modify_qp)(struct ib_qp *qp,
1666 struct ib_qp_attr *qp_attr,
1668 struct ib_udata *udata);
1669 int (*query_qp)(struct ib_qp *qp,
1670 struct ib_qp_attr *qp_attr,
1672 struct ib_qp_init_attr *qp_init_attr);
1673 int (*destroy_qp)(struct ib_qp *qp);
1674 int (*post_send)(struct ib_qp *qp,
1675 struct ib_send_wr *send_wr,
1676 struct ib_send_wr **bad_send_wr);
1677 int (*post_recv)(struct ib_qp *qp,
1678 struct ib_recv_wr *recv_wr,
1679 struct ib_recv_wr **bad_recv_wr);
1680 struct ib_cq * (*create_cq)(struct ib_device *device,
1681 const struct ib_cq_init_attr *attr,
1682 struct ib_ucontext *context,
1683 struct ib_udata *udata);
1684 int (*modify_cq)(struct ib_cq *cq, u16 cq_count,
1686 int (*destroy_cq)(struct ib_cq *cq);
1687 int (*resize_cq)(struct ib_cq *cq, int cqe,
1688 struct ib_udata *udata);
1689 int (*poll_cq)(struct ib_cq *cq, int num_entries,
1691 int (*peek_cq)(struct ib_cq *cq, int wc_cnt);
1692 int (*req_notify_cq)(struct ib_cq *cq,
1693 enum ib_cq_notify_flags flags);
1694 int (*req_ncomp_notif)(struct ib_cq *cq,
1696 struct ib_mr * (*get_dma_mr)(struct ib_pd *pd,
1697 int mr_access_flags);
1698 struct ib_mr * (*reg_phys_mr)(struct ib_pd *pd,
1699 struct ib_phys_buf *phys_buf_array,
1701 int mr_access_flags,
1703 struct ib_mr * (*reg_user_mr)(struct ib_pd *pd,
1704 u64 start, u64 length,
1706 int mr_access_flags,
1707 struct ib_udata *udata);
1708 int (*rereg_user_mr)(struct ib_mr *mr,
1710 u64 start, u64 length,
1712 int mr_access_flags,
1714 struct ib_udata *udata);
1715 int (*query_mr)(struct ib_mr *mr,
1716 struct ib_mr_attr *mr_attr);
1717 int (*dereg_mr)(struct ib_mr *mr);
1718 struct ib_mr * (*alloc_mr)(struct ib_pd *pd,
1719 enum ib_mr_type mr_type,
1721 struct ib_fast_reg_page_list * (*alloc_fast_reg_page_list)(struct ib_device *device,
1723 void (*free_fast_reg_page_list)(struct ib_fast_reg_page_list *page_list);
1724 int (*rereg_phys_mr)(struct ib_mr *mr,
1727 struct ib_phys_buf *phys_buf_array,
1729 int mr_access_flags,
1731 struct ib_mw * (*alloc_mw)(struct ib_pd *pd,
1732 enum ib_mw_type type);
1733 int (*bind_mw)(struct ib_qp *qp,
1735 struct ib_mw_bind *mw_bind);
1736 int (*dealloc_mw)(struct ib_mw *mw);
1737 struct ib_fmr * (*alloc_fmr)(struct ib_pd *pd,
1738 int mr_access_flags,
1739 struct ib_fmr_attr *fmr_attr);
1740 int (*map_phys_fmr)(struct ib_fmr *fmr,
1741 u64 *page_list, int list_len,
1743 int (*unmap_fmr)(struct list_head *fmr_list);
1744 int (*dealloc_fmr)(struct ib_fmr *fmr);
1745 int (*attach_mcast)(struct ib_qp *qp,
1748 int (*detach_mcast)(struct ib_qp *qp,
1751 int (*process_mad)(struct ib_device *device,
1752 int process_mad_flags,
1754 const struct ib_wc *in_wc,
1755 const struct ib_grh *in_grh,
1756 const struct ib_mad_hdr *in_mad,
1758 struct ib_mad_hdr *out_mad,
1759 size_t *out_mad_size,
1760 u16 *out_mad_pkey_index);
1761 struct ib_xrcd * (*alloc_xrcd)(struct ib_device *device,
1762 struct ib_ucontext *ucontext,
1763 struct ib_udata *udata);
1764 int (*dealloc_xrcd)(struct ib_xrcd *xrcd);
1765 struct ib_flow * (*create_flow)(struct ib_qp *qp,
1769 int (*destroy_flow)(struct ib_flow *flow_id);
1770 int (*check_mr_status)(struct ib_mr *mr, u32 check_mask,
1771 struct ib_mr_status *mr_status);
1773 struct ib_dma_mapping_ops *dma_ops;
1775 struct module *owner;
1777 struct kobject *ports_parent;
1778 struct list_head port_list;
1781 IB_DEV_UNINITIALIZED,
1787 u64 uverbs_cmd_mask;
1788 u64 uverbs_ex_cmd_mask;
1798 * The following mandatory functions are used only at device
1799 * registration. Keep functions such as these at the end of this
1800 * structure to avoid cache line misses when accessing struct ib_device
1803 int (*get_port_immutable)(struct ib_device *, u8, struct ib_port_immutable *);
1808 void (*add) (struct ib_device *);
1809 void (*remove)(struct ib_device *, void *client_data);
1811 /* Returns the net_dev belonging to this ib_client and matching the
1813 * @dev: An RDMA device that the net_dev use for communication.
1814 * @port: A physical port number on the RDMA device.
1815 * @pkey: P_Key that the net_dev uses if applicable.
1816 * @gid: A GID that the net_dev uses to communicate.
1817 * @addr: An IP address the net_dev is configured with.
1818 * @client_data: The device's client data set by ib_set_client_data().
1820 * An ib_client that implements a net_dev on top of RDMA devices
1821 * (such as IP over IB) should implement this callback, allowing the
1822 * rdma_cm module to find the right net_dev for a given request.
1824 * The caller is responsible for calling dev_put on the returned
1826 struct net_device *(*get_net_dev_by_params)(
1827 struct ib_device *dev,
1830 const union ib_gid *gid,
1831 const struct sockaddr *addr,
1833 struct list_head list;
1836 struct ib_device *ib_alloc_device(size_t size);
1837 void ib_dealloc_device(struct ib_device *device);
1839 int ib_register_device(struct ib_device *device,
1840 int (*port_callback)(struct ib_device *,
1841 u8, struct kobject *));
1842 void ib_unregister_device(struct ib_device *device);
1844 int ib_register_client (struct ib_client *client);
1845 void ib_unregister_client(struct ib_client *client);
1847 void *ib_get_client_data(struct ib_device *device, struct ib_client *client);
1848 void ib_set_client_data(struct ib_device *device, struct ib_client *client,
1851 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)
1853 return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0;
1856 static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len)
1858 return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0;
1862 * ib_modify_qp_is_ok - Check that the supplied attribute mask
1863 * contains all required attributes and no attributes not allowed for
1864 * the given QP state transition.
1865 * @cur_state: Current QP state
1866 * @next_state: Next QP state
1868 * @mask: Mask of supplied QP attributes
1869 * @ll : link layer of port
1871 * This function is a helper function that a low-level driver's
1872 * modify_qp method can use to validate the consumer's input. It
1873 * checks that cur_state and next_state are valid QP states, that a
1874 * transition from cur_state to next_state is allowed by the IB spec,
1875 * and that the attribute mask supplied is allowed for the transition.
1877 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
1878 enum ib_qp_type type, enum ib_qp_attr_mask mask,
1879 enum rdma_link_layer ll);
1881 int ib_register_event_handler (struct ib_event_handler *event_handler);
1882 int ib_unregister_event_handler(struct ib_event_handler *event_handler);
1883 void ib_dispatch_event(struct ib_event *event);
1885 int ib_query_device(struct ib_device *device,
1886 struct ib_device_attr *device_attr);
1888 int ib_query_port(struct ib_device *device,
1889 u8 port_num, struct ib_port_attr *port_attr);
1891 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
1895 * rdma_cap_ib_switch - Check if the device is IB switch
1896 * @device: Device to check
1898 * Device driver is responsible for setting is_switch bit on
1899 * in ib_device structure at init time.
1901 * Return: true if the device is IB switch.
1903 static inline bool rdma_cap_ib_switch(const struct ib_device *device)
1905 return device->is_switch;
1909 * rdma_start_port - Return the first valid port number for the device
1912 * @device: Device to be checked
1914 * Return start port number
1916 static inline u8 rdma_start_port(const struct ib_device *device)
1918 return rdma_cap_ib_switch(device) ? 0 : 1;
1922 * rdma_end_port - Return the last valid port number for the device
1925 * @device: Device to be checked
1927 * Return last port number
1929 static inline u8 rdma_end_port(const struct ib_device *device)
1931 return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt;
1934 static inline bool rdma_protocol_ib(const struct ib_device *device, u8 port_num)
1936 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IB;
1939 static inline bool rdma_protocol_roce(const struct ib_device *device, u8 port_num)
1941 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_ROCE;
1944 static inline bool rdma_protocol_iwarp(const struct ib_device *device, u8 port_num)
1946 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_PROT_IWARP;
1949 static inline bool rdma_ib_or_roce(const struct ib_device *device, u8 port_num)
1951 return device->port_immutable[port_num].core_cap_flags &
1952 (RDMA_CORE_CAP_PROT_IB | RDMA_CORE_CAP_PROT_ROCE);
1956 * rdma_cap_ib_mad - Check if the port of a device supports Infiniband
1957 * Management Datagrams.
1958 * @device: Device to check
1959 * @port_num: Port number to check
1961 * Management Datagrams (MAD) are a required part of the InfiniBand
1962 * specification and are supported on all InfiniBand devices. A slightly
1963 * extended version are also supported on OPA interfaces.
1965 * Return: true if the port supports sending/receiving of MAD packets.
1967 static inline bool rdma_cap_ib_mad(const struct ib_device *device, u8 port_num)
1969 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_MAD;
1973 * rdma_cap_opa_mad - Check if the port of device provides support for OPA
1974 * Management Datagrams.
1975 * @device: Device to check
1976 * @port_num: Port number to check
1978 * Intel OmniPath devices extend and/or replace the InfiniBand Management
1979 * datagrams with their own versions. These OPA MADs share many but not all of
1980 * the characteristics of InfiniBand MADs.
1982 * OPA MADs differ in the following ways:
1984 * 1) MADs are variable size up to 2K
1985 * IBTA defined MADs remain fixed at 256 bytes
1986 * 2) OPA SMPs must carry valid PKeys
1987 * 3) OPA SMP packets are a different format
1989 * Return: true if the port supports OPA MAD packet formats.
1991 static inline bool rdma_cap_opa_mad(struct ib_device *device, u8 port_num)
1993 return (device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_OPA_MAD)
1994 == RDMA_CORE_CAP_OPA_MAD;
1998 * rdma_cap_ib_smi - Check if the port of a device provides an Infiniband
1999 * Subnet Management Agent (SMA) on the Subnet Management Interface (SMI).
2000 * @device: Device to check
2001 * @port_num: Port number to check
2003 * Each InfiniBand node is required to provide a Subnet Management Agent
2004 * that the subnet manager can access. Prior to the fabric being fully
2005 * configured by the subnet manager, the SMA is accessed via a well known
2006 * interface called the Subnet Management Interface (SMI). This interface
2007 * uses directed route packets to communicate with the SM to get around the
2008 * chicken and egg problem of the SM needing to know what's on the fabric
2009 * in order to configure the fabric, and needing to configure the fabric in
2010 * order to send packets to the devices on the fabric. These directed
2011 * route packets do not need the fabric fully configured in order to reach
2012 * their destination. The SMI is the only method allowed to send
2013 * directed route packets on an InfiniBand fabric.
2015 * Return: true if the port provides an SMI.
2017 static inline bool rdma_cap_ib_smi(const struct ib_device *device, u8 port_num)
2019 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SMI;
2023 * rdma_cap_ib_cm - Check if the port of device has the capability Infiniband
2024 * Communication Manager.
2025 * @device: Device to check
2026 * @port_num: Port number to check
2028 * The InfiniBand Communication Manager is one of many pre-defined General
2029 * Service Agents (GSA) that are accessed via the General Service
2030 * Interface (GSI). It's role is to facilitate establishment of connections
2031 * between nodes as well as other management related tasks for established
2034 * Return: true if the port supports an IB CM (this does not guarantee that
2035 * a CM is actually running however).
2037 static inline bool rdma_cap_ib_cm(const struct ib_device *device, u8 port_num)
2039 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_CM;
2043 * rdma_cap_iw_cm - Check if the port of device has the capability IWARP
2044 * Communication Manager.
2045 * @device: Device to check
2046 * @port_num: Port number to check
2048 * Similar to above, but specific to iWARP connections which have a different
2049 * managment protocol than InfiniBand.
2051 * Return: true if the port supports an iWARP CM (this does not guarantee that
2052 * a CM is actually running however).
2054 static inline bool rdma_cap_iw_cm(const struct ib_device *device, u8 port_num)
2056 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IW_CM;
2060 * rdma_cap_ib_sa - Check if the port of device has the capability Infiniband
2061 * Subnet Administration.
2062 * @device: Device to check
2063 * @port_num: Port number to check
2065 * An InfiniBand Subnet Administration (SA) service is a pre-defined General
2066 * Service Agent (GSA) provided by the Subnet Manager (SM). On InfiniBand
2067 * fabrics, devices should resolve routes to other hosts by contacting the
2068 * SA to query the proper route.
2070 * Return: true if the port should act as a client to the fabric Subnet
2071 * Administration interface. This does not imply that the SA service is
2074 static inline bool rdma_cap_ib_sa(const struct ib_device *device, u8 port_num)
2076 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_IB_SA;
2080 * rdma_cap_ib_mcast - Check if the port of device has the capability Infiniband
2082 * @device: Device to check
2083 * @port_num: Port number to check
2085 * InfiniBand multicast registration is more complex than normal IPv4 or
2086 * IPv6 multicast registration. Each Host Channel Adapter must register
2087 * with the Subnet Manager when it wishes to join a multicast group. It
2088 * should do so only once regardless of how many queue pairs it subscribes
2089 * to this group. And it should leave the group only after all queue pairs
2090 * attached to the group have been detached.
2092 * Return: true if the port must undertake the additional adminstrative
2093 * overhead of registering/unregistering with the SM and tracking of the
2094 * total number of queue pairs attached to the multicast group.
2096 static inline bool rdma_cap_ib_mcast(const struct ib_device *device, u8 port_num)
2098 return rdma_cap_ib_sa(device, port_num);
2102 * rdma_cap_af_ib - Check if the port of device has the capability
2103 * Native Infiniband Address.
2104 * @device: Device to check
2105 * @port_num: Port number to check
2107 * InfiniBand addressing uses a port's GUID + Subnet Prefix to make a default
2108 * GID. RoCE uses a different mechanism, but still generates a GID via
2109 * a prescribed mechanism and port specific data.
2111 * Return: true if the port uses a GID address to identify devices on the
2114 static inline bool rdma_cap_af_ib(const struct ib_device *device, u8 port_num)
2116 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_AF_IB;
2120 * rdma_cap_eth_ah - Check if the port of device has the capability
2121 * Ethernet Address Handle.
2122 * @device: Device to check
2123 * @port_num: Port number to check
2125 * RoCE is InfiniBand over Ethernet, and it uses a well defined technique
2126 * to fabricate GIDs over Ethernet/IP specific addresses native to the
2127 * port. Normally, packet headers are generated by the sending host
2128 * adapter, but when sending connectionless datagrams, we must manually
2129 * inject the proper headers for the fabric we are communicating over.
2131 * Return: true if we are running as a RoCE port and must force the
2132 * addition of a Global Route Header built from our Ethernet Address
2133 * Handle into our header list for connectionless packets.
2135 static inline bool rdma_cap_eth_ah(const struct ib_device *device, u8 port_num)
2137 return device->port_immutable[port_num].core_cap_flags & RDMA_CORE_CAP_ETH_AH;
2141 * rdma_max_mad_size - Return the max MAD size required by this RDMA Port.
2144 * @port_num: Port number
2146 * This MAD size includes the MAD headers and MAD payload. No other headers
2149 * Return the max MAD size required by the Port. Will return 0 if the port
2150 * does not support MADs
2152 static inline size_t rdma_max_mad_size(const struct ib_device *device, u8 port_num)
2154 return device->port_immutable[port_num].max_mad_size;
2158 * rdma_cap_roce_gid_table - Check if the port of device uses roce_gid_table
2159 * @device: Device to check
2160 * @port_num: Port number to check
2162 * RoCE GID table mechanism manages the various GIDs for a device.
2164 * NOTE: if allocating the port's GID table has failed, this call will still
2165 * return true, but any RoCE GID table API will fail.
2167 * Return: true if the port uses RoCE GID table mechanism in order to manage
2170 static inline bool rdma_cap_roce_gid_table(const struct ib_device *device,
2173 return rdma_protocol_roce(device, port_num) &&
2174 device->add_gid && device->del_gid;
2177 int ib_query_gid(struct ib_device *device,
2178 u8 port_num, int index, union ib_gid *gid);
2180 int ib_query_pkey(struct ib_device *device,
2181 u8 port_num, u16 index, u16 *pkey);
2183 int ib_modify_device(struct ib_device *device,
2184 int device_modify_mask,
2185 struct ib_device_modify *device_modify);
2187 int ib_modify_port(struct ib_device *device,
2188 u8 port_num, int port_modify_mask,
2189 struct ib_port_modify *port_modify);
2191 int ib_find_gid(struct ib_device *device, union ib_gid *gid,
2192 u8 *port_num, u16 *index);
2194 int ib_find_pkey(struct ib_device *device,
2195 u8 port_num, u16 pkey, u16 *index);
2197 struct ib_pd *ib_alloc_pd(struct ib_device *device);
2200 * ib_dealloc_pd - Deallocates a protection domain.
2201 * @pd: The protection domain to deallocate.
2203 int ib_dealloc_pd(struct ib_pd *pd);
2206 * ib_create_ah - Creates an address handle for the given address vector.
2207 * @pd: The protection domain associated with the address handle.
2208 * @ah_attr: The attributes of the address vector.
2210 * The address handle is used to reference a local or global destination
2211 * in all UD QP post sends.
2213 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
2216 * ib_init_ah_from_wc - Initializes address handle attributes from a
2218 * @device: Device on which the received message arrived.
2219 * @port_num: Port on which the received message arrived.
2220 * @wc: Work completion associated with the received message.
2221 * @grh: References the received global route header. This parameter is
2222 * ignored unless the work completion indicates that the GRH is valid.
2223 * @ah_attr: Returned attributes that can be used when creating an address
2224 * handle for replying to the message.
2226 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
2227 const struct ib_wc *wc, const struct ib_grh *grh,
2228 struct ib_ah_attr *ah_attr);
2231 * ib_create_ah_from_wc - Creates an address handle associated with the
2232 * sender of the specified work completion.
2233 * @pd: The protection domain associated with the address handle.
2234 * @wc: Work completion information associated with a received message.
2235 * @grh: References the received global route header. This parameter is
2236 * ignored unless the work completion indicates that the GRH is valid.
2237 * @port_num: The outbound port number to associate with the address.
2239 * The address handle is used to reference a local or global destination
2240 * in all UD QP post sends.
2242 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
2243 const struct ib_grh *grh, u8 port_num);
2246 * ib_modify_ah - Modifies the address vector associated with an address
2248 * @ah: The address handle to modify.
2249 * @ah_attr: The new address vector attributes to associate with the
2252 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
2255 * ib_query_ah - Queries the address vector associated with an address
2257 * @ah: The address handle to query.
2258 * @ah_attr: The address vector attributes associated with the address
2261 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr);
2264 * ib_destroy_ah - Destroys an address handle.
2265 * @ah: The address handle to destroy.
2267 int ib_destroy_ah(struct ib_ah *ah);
2270 * ib_create_srq - Creates a SRQ associated with the specified protection
2272 * @pd: The protection domain associated with the SRQ.
2273 * @srq_init_attr: A list of initial attributes required to create the
2274 * SRQ. If SRQ creation succeeds, then the attributes are updated to
2275 * the actual capabilities of the created SRQ.
2277 * srq_attr->max_wr and srq_attr->max_sge are read the determine the
2278 * requested size of the SRQ, and set to the actual values allocated
2279 * on return. If ib_create_srq() succeeds, then max_wr and max_sge
2280 * will always be at least as large as the requested values.
2282 struct ib_srq *ib_create_srq(struct ib_pd *pd,
2283 struct ib_srq_init_attr *srq_init_attr);
2286 * ib_modify_srq - Modifies the attributes for the specified SRQ.
2287 * @srq: The SRQ to modify.
2288 * @srq_attr: On input, specifies the SRQ attributes to modify. On output,
2289 * the current values of selected SRQ attributes are returned.
2290 * @srq_attr_mask: A bit-mask used to specify which attributes of the SRQ
2291 * are being modified.
2293 * The mask may contain IB_SRQ_MAX_WR to resize the SRQ and/or
2294 * IB_SRQ_LIMIT to set the SRQ's limit and request notification when
2295 * the number of receives queued drops below the limit.
2297 int ib_modify_srq(struct ib_srq *srq,
2298 struct ib_srq_attr *srq_attr,
2299 enum ib_srq_attr_mask srq_attr_mask);
2302 * ib_query_srq - Returns the attribute list and current values for the
2304 * @srq: The SRQ to query.
2305 * @srq_attr: The attributes of the specified SRQ.
2307 int ib_query_srq(struct ib_srq *srq,
2308 struct ib_srq_attr *srq_attr);
2311 * ib_destroy_srq - Destroys the specified SRQ.
2312 * @srq: The SRQ to destroy.
2314 int ib_destroy_srq(struct ib_srq *srq);
2317 * ib_post_srq_recv - Posts a list of work requests to the specified SRQ.
2318 * @srq: The SRQ to post the work request on.
2319 * @recv_wr: A list of work requests to post on the receive queue.
2320 * @bad_recv_wr: On an immediate failure, this parameter will reference
2321 * the work request that failed to be posted on the QP.
2323 static inline int ib_post_srq_recv(struct ib_srq *srq,
2324 struct ib_recv_wr *recv_wr,
2325 struct ib_recv_wr **bad_recv_wr)
2327 return srq->device->post_srq_recv(srq, recv_wr, bad_recv_wr);
2331 * ib_create_qp - Creates a QP associated with the specified protection
2333 * @pd: The protection domain associated with the QP.
2334 * @qp_init_attr: A list of initial attributes required to create the
2335 * QP. If QP creation succeeds, then the attributes are updated to
2336 * the actual capabilities of the created QP.
2338 struct ib_qp *ib_create_qp(struct ib_pd *pd,
2339 struct ib_qp_init_attr *qp_init_attr);
2342 * ib_modify_qp - Modifies the attributes for the specified QP and then
2343 * transitions the QP to the given state.
2344 * @qp: The QP to modify.
2345 * @qp_attr: On input, specifies the QP attributes to modify. On output,
2346 * the current values of selected QP attributes are returned.
2347 * @qp_attr_mask: A bit-mask used to specify which attributes of the QP
2348 * are being modified.
2350 int ib_modify_qp(struct ib_qp *qp,
2351 struct ib_qp_attr *qp_attr,
2355 * ib_query_qp - Returns the attribute list and current values for the
2357 * @qp: The QP to query.
2358 * @qp_attr: The attributes of the specified QP.
2359 * @qp_attr_mask: A bit-mask used to select specific attributes to query.
2360 * @qp_init_attr: Additional attributes of the selected QP.
2362 * The qp_attr_mask may be used to limit the query to gathering only the
2363 * selected attributes.
2365 int ib_query_qp(struct ib_qp *qp,
2366 struct ib_qp_attr *qp_attr,
2368 struct ib_qp_init_attr *qp_init_attr);
2371 * ib_destroy_qp - Destroys the specified QP.
2372 * @qp: The QP to destroy.
2374 int ib_destroy_qp(struct ib_qp *qp);
2377 * ib_open_qp - Obtain a reference to an existing sharable QP.
2378 * @xrcd - XRC domain
2379 * @qp_open_attr: Attributes identifying the QP to open.
2381 * Returns a reference to a sharable QP.
2383 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
2384 struct ib_qp_open_attr *qp_open_attr);
2387 * ib_close_qp - Release an external reference to a QP.
2388 * @qp: The QP handle to release
2390 * The opened QP handle is released by the caller. The underlying
2391 * shared QP is not destroyed until all internal references are released.
2393 int ib_close_qp(struct ib_qp *qp);
2396 * ib_post_send - Posts a list of work requests to the send queue of
2398 * @qp: The QP to post the work request on.
2399 * @send_wr: A list of work requests to post on the send queue.
2400 * @bad_send_wr: On an immediate failure, this parameter will reference
2401 * the work request that failed to be posted on the QP.
2403 * While IBA Vol. 1 section 11.4.1.1 specifies that if an immediate
2404 * error is returned, the QP state shall not be affected,
2405 * ib_post_send() will return an immediate error after queueing any
2406 * earlier work requests in the list.
2408 static inline int ib_post_send(struct ib_qp *qp,
2409 struct ib_send_wr *send_wr,
2410 struct ib_send_wr **bad_send_wr)
2412 return qp->device->post_send(qp, send_wr, bad_send_wr);
2416 * ib_post_recv - Posts a list of work requests to the receive queue of
2418 * @qp: The QP to post the work request on.
2419 * @recv_wr: A list of work requests to post on the receive queue.
2420 * @bad_recv_wr: On an immediate failure, this parameter will reference
2421 * the work request that failed to be posted on the QP.
2423 static inline int ib_post_recv(struct ib_qp *qp,
2424 struct ib_recv_wr *recv_wr,
2425 struct ib_recv_wr **bad_recv_wr)
2427 return qp->device->post_recv(qp, recv_wr, bad_recv_wr);
2431 * ib_create_cq - Creates a CQ on the specified device.
2432 * @device: The device on which to create the CQ.
2433 * @comp_handler: A user-specified callback that is invoked when a
2434 * completion event occurs on the CQ.
2435 * @event_handler: A user-specified callback that is invoked when an
2436 * asynchronous event not associated with a completion occurs on the CQ.
2437 * @cq_context: Context associated with the CQ returned to the user via
2438 * the associated completion and event handlers.
2439 * @cq_attr: The attributes the CQ should be created upon.
2441 * Users can examine the cq structure to determine the actual CQ size.
2443 struct ib_cq *ib_create_cq(struct ib_device *device,
2444 ib_comp_handler comp_handler,
2445 void (*event_handler)(struct ib_event *, void *),
2447 const struct ib_cq_init_attr *cq_attr);
2450 * ib_resize_cq - Modifies the capacity of the CQ.
2451 * @cq: The CQ to resize.
2452 * @cqe: The minimum size of the CQ.
2454 * Users can examine the cq structure to determine the actual CQ size.
2456 int ib_resize_cq(struct ib_cq *cq, int cqe);
2459 * ib_modify_cq - Modifies moderation params of the CQ
2460 * @cq: The CQ to modify.
2461 * @cq_count: number of CQEs that will trigger an event
2462 * @cq_period: max period of time in usec before triggering an event
2465 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
2468 * ib_destroy_cq - Destroys the specified CQ.
2469 * @cq: The CQ to destroy.
2471 int ib_destroy_cq(struct ib_cq *cq);
2474 * ib_poll_cq - poll a CQ for completion(s)
2475 * @cq:the CQ being polled
2476 * @num_entries:maximum number of completions to return
2477 * @wc:array of at least @num_entries &struct ib_wc where completions
2480 * Poll a CQ for (possibly multiple) completions. If the return value
2481 * is < 0, an error occurred. If the return value is >= 0, it is the
2482 * number of completions returned. If the return value is
2483 * non-negative and < num_entries, then the CQ was emptied.
2485 static inline int ib_poll_cq(struct ib_cq *cq, int num_entries,
2488 return cq->device->poll_cq(cq, num_entries, wc);
2492 * ib_peek_cq - Returns the number of unreaped completions currently
2493 * on the specified CQ.
2494 * @cq: The CQ to peek.
2495 * @wc_cnt: A minimum number of unreaped completions to check for.
2497 * If the number of unreaped completions is greater than or equal to wc_cnt,
2498 * this function returns wc_cnt, otherwise, it returns the actual number of
2499 * unreaped completions.
2501 int ib_peek_cq(struct ib_cq *cq, int wc_cnt);
2504 * ib_req_notify_cq - Request completion notification on a CQ.
2505 * @cq: The CQ to generate an event for.
2507 * Must contain exactly one of %IB_CQ_SOLICITED or %IB_CQ_NEXT_COMP
2508 * to request an event on the next solicited event or next work
2509 * completion at any type, respectively. %IB_CQ_REPORT_MISSED_EVENTS
2510 * may also be |ed in to request a hint about missed events, as
2514 * < 0 means an error occurred while requesting notification
2515 * == 0 means notification was requested successfully, and if
2516 * IB_CQ_REPORT_MISSED_EVENTS was passed in, then no events
2517 * were missed and it is safe to wait for another event. In
2518 * this case is it guaranteed that any work completions added
2519 * to the CQ since the last CQ poll will trigger a completion
2520 * notification event.
2521 * > 0 is only returned if IB_CQ_REPORT_MISSED_EVENTS was passed
2522 * in. It means that the consumer must poll the CQ again to
2523 * make sure it is empty to avoid missing an event because of a
2524 * race between requesting notification and an entry being
2525 * added to the CQ. This return value means it is possible
2526 * (but not guaranteed) that a work completion has been added
2527 * to the CQ since the last poll without triggering a
2528 * completion notification event.
2530 static inline int ib_req_notify_cq(struct ib_cq *cq,
2531 enum ib_cq_notify_flags flags)
2533 return cq->device->req_notify_cq(cq, flags);
2537 * ib_req_ncomp_notif - Request completion notification when there are
2538 * at least the specified number of unreaped completions on the CQ.
2539 * @cq: The CQ to generate an event for.
2540 * @wc_cnt: The number of unreaped completions that should be on the
2541 * CQ before an event is generated.
2543 static inline int ib_req_ncomp_notif(struct ib_cq *cq, int wc_cnt)
2545 return cq->device->req_ncomp_notif ?
2546 cq->device->req_ncomp_notif(cq, wc_cnt) :
2551 * ib_get_dma_mr - Returns a memory region for system memory that is
2553 * @pd: The protection domain associated with the memory region.
2554 * @mr_access_flags: Specifies the memory access rights.
2556 * Note that the ib_dma_*() functions defined below must be used
2557 * to create/destroy addresses used with the Lkey or Rkey returned
2558 * by ib_get_dma_mr().
2560 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
2563 * ib_dma_mapping_error - check a DMA addr for error
2564 * @dev: The device for which the dma_addr was created
2565 * @dma_addr: The DMA address to check
2567 static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
2570 return dev->dma_ops->mapping_error(dev, dma_addr);
2571 return dma_mapping_error(dev->dma_device, dma_addr);
2575 * ib_dma_map_single - Map a kernel virtual address to DMA address
2576 * @dev: The device for which the dma_addr is to be created
2577 * @cpu_addr: The kernel virtual address
2578 * @size: The size of the region in bytes
2579 * @direction: The direction of the DMA
2581 static inline u64 ib_dma_map_single(struct ib_device *dev,
2582 void *cpu_addr, size_t size,
2583 enum dma_data_direction direction)
2586 return dev->dma_ops->map_single(dev, cpu_addr, size, direction);
2587 return dma_map_single(dev->dma_device, cpu_addr, size, direction);
2591 * ib_dma_unmap_single - Destroy a mapping created by ib_dma_map_single()
2592 * @dev: The device for which the DMA address was created
2593 * @addr: The DMA address
2594 * @size: The size of the region in bytes
2595 * @direction: The direction of the DMA
2597 static inline void ib_dma_unmap_single(struct ib_device *dev,
2598 u64 addr, size_t size,
2599 enum dma_data_direction direction)
2602 dev->dma_ops->unmap_single(dev, addr, size, direction);
2604 dma_unmap_single(dev->dma_device, addr, size, direction);
2607 static inline u64 ib_dma_map_single_attrs(struct ib_device *dev,
2608 void *cpu_addr, size_t size,
2609 enum dma_data_direction direction,
2610 struct dma_attrs *attrs)
2612 return dma_map_single_attrs(dev->dma_device, cpu_addr, size,
2616 static inline void ib_dma_unmap_single_attrs(struct ib_device *dev,
2617 u64 addr, size_t size,
2618 enum dma_data_direction direction,
2619 struct dma_attrs *attrs)
2621 return dma_unmap_single_attrs(dev->dma_device, addr, size,
2626 * ib_dma_map_page - Map a physical page to DMA address
2627 * @dev: The device for which the dma_addr is to be created
2628 * @page: The page to be mapped
2629 * @offset: The offset within the page
2630 * @size: The size of the region in bytes
2631 * @direction: The direction of the DMA
2633 static inline u64 ib_dma_map_page(struct ib_device *dev,
2635 unsigned long offset,
2637 enum dma_data_direction direction)
2640 return dev->dma_ops->map_page(dev, page, offset, size, direction);
2641 return dma_map_page(dev->dma_device, page, offset, size, direction);
2645 * ib_dma_unmap_page - Destroy a mapping created by ib_dma_map_page()
2646 * @dev: The device for which the DMA address was created
2647 * @addr: The DMA address
2648 * @size: The size of the region in bytes
2649 * @direction: The direction of the DMA
2651 static inline void ib_dma_unmap_page(struct ib_device *dev,
2652 u64 addr, size_t size,
2653 enum dma_data_direction direction)
2656 dev->dma_ops->unmap_page(dev, addr, size, direction);
2658 dma_unmap_page(dev->dma_device, addr, size, direction);
2662 * ib_dma_map_sg - Map a scatter/gather list to DMA addresses
2663 * @dev: The device for which the DMA addresses are to be created
2664 * @sg: The array of scatter/gather entries
2665 * @nents: The number of scatter/gather entries
2666 * @direction: The direction of the DMA
2668 static inline int ib_dma_map_sg(struct ib_device *dev,
2669 struct scatterlist *sg, int nents,
2670 enum dma_data_direction direction)
2673 return dev->dma_ops->map_sg(dev, sg, nents, direction);
2674 return dma_map_sg(dev->dma_device, sg, nents, direction);
2678 * ib_dma_unmap_sg - Unmap a scatter/gather list of DMA addresses
2679 * @dev: The device for which the DMA addresses were created
2680 * @sg: The array of scatter/gather entries
2681 * @nents: The number of scatter/gather entries
2682 * @direction: The direction of the DMA
2684 static inline void ib_dma_unmap_sg(struct ib_device *dev,
2685 struct scatterlist *sg, int nents,
2686 enum dma_data_direction direction)
2689 dev->dma_ops->unmap_sg(dev, sg, nents, direction);
2691 dma_unmap_sg(dev->dma_device, sg, nents, direction);
2694 static inline int ib_dma_map_sg_attrs(struct ib_device *dev,
2695 struct scatterlist *sg, int nents,
2696 enum dma_data_direction direction,
2697 struct dma_attrs *attrs)
2699 return dma_map_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2702 static inline void ib_dma_unmap_sg_attrs(struct ib_device *dev,
2703 struct scatterlist *sg, int nents,
2704 enum dma_data_direction direction,
2705 struct dma_attrs *attrs)
2707 dma_unmap_sg_attrs(dev->dma_device, sg, nents, direction, attrs);
2710 * ib_sg_dma_address - Return the DMA address from a scatter/gather entry
2711 * @dev: The device for which the DMA addresses were created
2712 * @sg: The scatter/gather entry
2714 * Note: this function is obsolete. To do: change all occurrences of
2715 * ib_sg_dma_address() into sg_dma_address().
2717 static inline u64 ib_sg_dma_address(struct ib_device *dev,
2718 struct scatterlist *sg)
2720 return sg_dma_address(sg);
2724 * ib_sg_dma_len - Return the DMA length from a scatter/gather entry
2725 * @dev: The device for which the DMA addresses were created
2726 * @sg: The scatter/gather entry
2728 * Note: this function is obsolete. To do: change all occurrences of
2729 * ib_sg_dma_len() into sg_dma_len().
2731 static inline unsigned int ib_sg_dma_len(struct ib_device *dev,
2732 struct scatterlist *sg)
2734 return sg_dma_len(sg);
2738 * ib_dma_sync_single_for_cpu - Prepare DMA region to be accessed by CPU
2739 * @dev: The device for which the DMA address was created
2740 * @addr: The DMA address
2741 * @size: The size of the region in bytes
2742 * @dir: The direction of the DMA
2744 static inline void ib_dma_sync_single_for_cpu(struct ib_device *dev,
2747 enum dma_data_direction dir)
2750 dev->dma_ops->sync_single_for_cpu(dev, addr, size, dir);
2752 dma_sync_single_for_cpu(dev->dma_device, addr, size, dir);
2756 * ib_dma_sync_single_for_device - Prepare DMA region to be accessed by device
2757 * @dev: The device for which the DMA address was created
2758 * @addr: The DMA address
2759 * @size: The size of the region in bytes
2760 * @dir: The direction of the DMA
2762 static inline void ib_dma_sync_single_for_device(struct ib_device *dev,
2765 enum dma_data_direction dir)
2768 dev->dma_ops->sync_single_for_device(dev, addr, size, dir);
2770 dma_sync_single_for_device(dev->dma_device, addr, size, dir);
2774 * ib_dma_alloc_coherent - Allocate memory and map it for DMA
2775 * @dev: The device for which the DMA address is requested
2776 * @size: The size of the region to allocate in bytes
2777 * @dma_handle: A pointer for returning the DMA address of the region
2778 * @flag: memory allocator flags
2780 static inline void *ib_dma_alloc_coherent(struct ib_device *dev,
2786 return dev->dma_ops->alloc_coherent(dev, size, dma_handle, flag);
2791 ret = dma_alloc_coherent(dev->dma_device, size, &handle, flag);
2792 *dma_handle = handle;
2798 * ib_dma_free_coherent - Free memory allocated by ib_dma_alloc_coherent()
2799 * @dev: The device for which the DMA addresses were allocated
2800 * @size: The size of the region
2801 * @cpu_addr: the address returned by ib_dma_alloc_coherent()
2802 * @dma_handle: the DMA address returned by ib_dma_alloc_coherent()
2804 static inline void ib_dma_free_coherent(struct ib_device *dev,
2805 size_t size, void *cpu_addr,
2809 dev->dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
2811 dma_free_coherent(dev->dma_device, size, cpu_addr, dma_handle);
2815 * ib_reg_phys_mr - Prepares a virtually addressed memory region for use
2817 * @pd: The protection domain associated assigned to the registered region.
2818 * @phys_buf_array: Specifies a list of physical buffers to use in the
2820 * @num_phys_buf: Specifies the size of the phys_buf_array.
2821 * @mr_access_flags: Specifies the memory access rights.
2822 * @iova_start: The offset of the region's starting I/O virtual address.
2824 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
2825 struct ib_phys_buf *phys_buf_array,
2827 int mr_access_flags,
2831 * ib_rereg_phys_mr - Modifies the attributes of an existing memory region.
2832 * Conceptually, this call performs the functions deregister memory region
2833 * followed by register physical memory region. Where possible,
2834 * resources are reused instead of deallocated and reallocated.
2835 * @mr: The memory region to modify.
2836 * @mr_rereg_mask: A bit-mask used to indicate which of the following
2837 * properties of the memory region are being modified.
2838 * @pd: If %IB_MR_REREG_PD is set in mr_rereg_mask, this field specifies
2839 * the new protection domain to associated with the memory region,
2840 * otherwise, this parameter is ignored.
2841 * @phys_buf_array: If %IB_MR_REREG_TRANS is set in mr_rereg_mask, this
2842 * field specifies a list of physical buffers to use in the new
2843 * translation, otherwise, this parameter is ignored.
2844 * @num_phys_buf: If %IB_MR_REREG_TRANS is set in mr_rereg_mask, this
2845 * field specifies the size of the phys_buf_array, otherwise, this
2846 * parameter is ignored.
2847 * @mr_access_flags: If %IB_MR_REREG_ACCESS is set in mr_rereg_mask, this
2848 * field specifies the new memory access rights, otherwise, this
2849 * parameter is ignored.
2850 * @iova_start: The offset of the region's starting I/O virtual address.
2852 int ib_rereg_phys_mr(struct ib_mr *mr,
2855 struct ib_phys_buf *phys_buf_array,
2857 int mr_access_flags,
2861 * ib_query_mr - Retrieves information about a specific memory region.
2862 * @mr: The memory region to retrieve information about.
2863 * @mr_attr: The attributes of the specified memory region.
2865 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr);
2868 * ib_dereg_mr - Deregisters a memory region and removes it from the
2869 * HCA translation table.
2870 * @mr: The memory region to deregister.
2872 * This function can fail, if the memory region has memory windows bound to it.
2874 int ib_dereg_mr(struct ib_mr *mr);
2876 struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
2877 enum ib_mr_type mr_type,
2881 * ib_alloc_fast_reg_page_list - Allocates a page list array
2882 * @device - ib device pointer.
2883 * @page_list_len - size of the page list array to be allocated.
2885 * This allocates and returns a struct ib_fast_reg_page_list * and a
2886 * page_list array that is at least page_list_len in size. The actual
2887 * size is returned in max_page_list_len. The caller is responsible
2888 * for initializing the contents of the page_list array before posting
2889 * a send work request with the IB_WC_FAST_REG_MR opcode.
2891 * The page_list array entries must be translated using one of the
2892 * ib_dma_*() functions just like the addresses passed to
2893 * ib_map_phys_fmr(). Once the ib_post_send() is issued, the struct
2894 * ib_fast_reg_page_list must not be modified by the caller until the
2895 * IB_WC_FAST_REG_MR work request completes.
2897 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(
2898 struct ib_device *device, int page_list_len);
2901 * ib_free_fast_reg_page_list - Deallocates a previously allocated
2903 * @page_list - struct ib_fast_reg_page_list pointer to be deallocated.
2905 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list);
2908 * ib_update_fast_reg_key - updates the key portion of the fast_reg MR
2910 * @mr - struct ib_mr pointer to be updated.
2911 * @newkey - new key to be used.
2913 static inline void ib_update_fast_reg_key(struct ib_mr *mr, u8 newkey)
2915 mr->lkey = (mr->lkey & 0xffffff00) | newkey;
2916 mr->rkey = (mr->rkey & 0xffffff00) | newkey;
2920 * ib_inc_rkey - increments the key portion of the given rkey. Can be used
2921 * for calculating a new rkey for type 2 memory windows.
2922 * @rkey - the rkey to increment.
2924 static inline u32 ib_inc_rkey(u32 rkey)
2926 const u32 mask = 0x000000ff;
2927 return ((rkey + 1) & mask) | (rkey & ~mask);
2931 * ib_alloc_mw - Allocates a memory window.
2932 * @pd: The protection domain associated with the memory window.
2933 * @type: The type of the memory window (1 or 2).
2935 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type);
2938 * ib_bind_mw - Posts a work request to the send queue of the specified
2939 * QP, which binds the memory window to the given address range and
2940 * remote access attributes.
2941 * @qp: QP to post the bind work request on.
2942 * @mw: The memory window to bind.
2943 * @mw_bind: Specifies information about the memory window, including
2944 * its address range, remote access rights, and associated memory region.
2946 * If there is no immediate error, the function will update the rkey member
2947 * of the mw parameter to its new value. The bind operation can still fail
2950 static inline int ib_bind_mw(struct ib_qp *qp,
2952 struct ib_mw_bind *mw_bind)
2954 /* XXX reference counting in corresponding MR? */
2955 return mw->device->bind_mw ?
2956 mw->device->bind_mw(qp, mw, mw_bind) :
2961 * ib_dealloc_mw - Deallocates a memory window.
2962 * @mw: The memory window to deallocate.
2964 int ib_dealloc_mw(struct ib_mw *mw);
2967 * ib_alloc_fmr - Allocates a unmapped fast memory region.
2968 * @pd: The protection domain associated with the unmapped region.
2969 * @mr_access_flags: Specifies the memory access rights.
2970 * @fmr_attr: Attributes of the unmapped region.
2972 * A fast memory region must be mapped before it can be used as part of
2975 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
2976 int mr_access_flags,
2977 struct ib_fmr_attr *fmr_attr);
2980 * ib_map_phys_fmr - Maps a list of physical pages to a fast memory region.
2981 * @fmr: The fast memory region to associate with the pages.
2982 * @page_list: An array of physical pages to map to the fast memory region.
2983 * @list_len: The number of pages in page_list.
2984 * @iova: The I/O virtual address to use with the mapped region.
2986 static inline int ib_map_phys_fmr(struct ib_fmr *fmr,
2987 u64 *page_list, int list_len,
2990 return fmr->device->map_phys_fmr(fmr, page_list, list_len, iova);
2994 * ib_unmap_fmr - Removes the mapping from a list of fast memory regions.
2995 * @fmr_list: A linked list of fast memory regions to unmap.
2997 int ib_unmap_fmr(struct list_head *fmr_list);
3000 * ib_dealloc_fmr - Deallocates a fast memory region.
3001 * @fmr: The fast memory region to deallocate.
3003 int ib_dealloc_fmr(struct ib_fmr *fmr);
3006 * ib_attach_mcast - Attaches the specified QP to a multicast group.
3007 * @qp: QP to attach to the multicast group. The QP must be type
3009 * @gid: Multicast group GID.
3010 * @lid: Multicast group LID in host byte order.
3012 * In order to send and receive multicast packets, subnet
3013 * administration must have created the multicast group and configured
3014 * the fabric appropriately. The port associated with the specified
3015 * QP must also be a member of the multicast group.
3017 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
3020 * ib_detach_mcast - Detaches the specified QP from a multicast group.
3021 * @qp: QP to detach from the multicast group.
3022 * @gid: Multicast group GID.
3023 * @lid: Multicast group LID in host byte order.
3025 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid);
3028 * ib_alloc_xrcd - Allocates an XRC domain.
3029 * @device: The device on which to allocate the XRC domain.
3031 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device);
3034 * ib_dealloc_xrcd - Deallocates an XRC domain.
3035 * @xrcd: The XRC domain to deallocate.
3037 int ib_dealloc_xrcd(struct ib_xrcd *xrcd);
3039 struct ib_flow *ib_create_flow(struct ib_qp *qp,
3040 struct ib_flow_attr *flow_attr, int domain);
3041 int ib_destroy_flow(struct ib_flow *flow_id);
3043 static inline int ib_check_mr_access(int flags)
3046 * Local write permission is required if remote write or
3047 * remote atomic permission is also requested.
3049 if (flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
3050 !(flags & IB_ACCESS_LOCAL_WRITE))
3057 * ib_check_mr_status: lightweight check of MR status.
3058 * This routine may provide status checks on a selected
3059 * ib_mr. first use is for signature status check.
3061 * @mr: A memory region.
3062 * @check_mask: Bitmask of which checks to perform from
3063 * ib_mr_status_check enumeration.
3064 * @mr_status: The container of relevant status checks.
3065 * failed checks will be indicated in the status bitmask
3066 * and the relevant info shall be in the error item.
3068 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
3069 struct ib_mr_status *mr_status);
3071 struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port,
3072 u16 pkey, const union ib_gid *gid,
3073 const struct sockaddr *addr);
3075 #endif /* IB_VERBS_H */