3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2015 Intel Corporation.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
21 * Copyright(c) 2015 Intel Corporation.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
27 * - Redistributions of source code must retain the above copyright
28 * notice, this list of conditions and the following disclaimer.
29 * - Redistributions in binary form must reproduce the above copyright
30 * notice, this list of conditions and the following disclaimer in
31 * the documentation and/or other materials provided with the
33 * - Neither the name of Intel Corporation nor the names of its
34 * contributors may be used to endorse or promote products derived
35 * from this software without specific prior written permission.
37 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
38 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
39 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
40 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
41 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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45 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 #include <linux/types.h>
55 #include <linux/seqlock.h>
56 #include <linux/kernel.h>
57 #include <linux/interrupt.h>
58 #include <linux/kref.h>
59 #include <linux/workqueue.h>
60 #include <linux/kthread.h>
61 #include <linux/completion.h>
62 #include <rdma/ib_pack.h>
63 #include <rdma/ib_user_verbs.h>
64 #include <rdma/ib_mad.h>
65 #include <rdma/rdma_vt.h>
66 #include <rdma/rdmavt_qp.h>
67 #include <rdma/rdmavt_cq.h>
70 struct hfi1_pportdata;
76 #define HFI1_MAX_RDMA_ATOMIC 16
77 #define HFI1_GUIDS_PER_PORT 5
80 * Increment this value if any changes that break userspace ABI
81 * compatibility are made.
83 #define HFI1_UVERBS_ABI_VERSION 2
85 #define IB_SEQ_NAK (3 << 29)
87 /* AETH NAK opcode values */
88 #define IB_RNR_NAK 0x20
89 #define IB_NAK_PSN_ERROR 0x60
90 #define IB_NAK_INVALID_REQUEST 0x61
91 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62
92 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
93 #define IB_NAK_INVALID_RD_REQUEST 0x64
95 /* IB Performance Manager status values */
96 #define IB_PMA_SAMPLE_STATUS_DONE 0x00
97 #define IB_PMA_SAMPLE_STATUS_STARTED 0x01
98 #define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
100 /* Mandatory IB performance counter select values. */
101 #define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
102 #define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
103 #define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
104 #define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
105 #define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
107 #define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
109 #define IB_BTH_REQ_ACK BIT(31)
110 #define IB_BTH_SOLICITED BIT(23)
111 #define IB_BTH_MIG_REQ BIT(22)
113 #define IB_GRH_VERSION 6
114 #define IB_GRH_VERSION_MASK 0xF
115 #define IB_GRH_VERSION_SHIFT 28
116 #define IB_GRH_TCLASS_MASK 0xFF
117 #define IB_GRH_TCLASS_SHIFT 20
118 #define IB_GRH_FLOW_MASK 0xFFFFF
119 #define IB_GRH_FLOW_SHIFT 0
120 #define IB_GRH_NEXT_HDR 0x1B
122 #define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
124 /* flags passed by hfi1_ib_rcv() */
126 HFI1_HAS_GRH = (1 << 0),
135 struct ib_atomic_eth {
136 __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */
153 __be32 atomic_ack_eth[2];
157 struct ib_atomic_eth atomic_eth;
160 struct hfi1_other_headers {
166 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
167 * long (72 w/ imm_data). Only the first 56 bytes of the IB header
168 * will be in the eager header buffer. The remaining 12 or 16 bytes
169 * are in the data buffer.
171 struct hfi1_ib_header {
176 struct hfi1_other_headers oth;
178 struct hfi1_other_headers oth;
182 struct ahg_ib_header {
183 struct sdma_engine *sde;
188 struct hfi1_ib_header ibh;
191 struct hfi1_pio_header {
193 struct hfi1_ib_header hdr;
197 * used for force cacheline alignment for AHG
199 struct tx_pio_header {
200 struct hfi1_pio_header phdr;
201 } ____cacheline_aligned;
204 * hfi1 specific data structures that will be hidden from rvt after the queue
205 * pair is made common
207 struct hfi1_qp_priv {
208 struct ahg_ib_header *s_hdr; /* next packet header to send */
209 struct sdma_engine *s_sde; /* current sde */
210 u8 s_sc; /* SC[0..4] for next packet */
211 u8 r_adefered; /* number of acks defered */
212 struct iowait s_iowait;
213 struct rvt_qp *owner;
217 * This structure is used to hold commonly lookedup and computed values during
218 * the send engine progress.
220 struct hfi1_pkt_state {
221 struct hfi1_ibdev *dev;
222 struct hfi1_ibport *ibp;
223 struct hfi1_pportdata *ppd;
226 #define HFI1_PSN_CREDIT 16
228 struct hfi1_opcode_stats {
229 u64 n_packets; /* number of packets */
230 u64 n_bytes; /* total number of bytes */
233 struct hfi1_opcode_stats_perctx {
234 struct hfi1_opcode_stats stats[256];
237 static inline void inc_opstats(
239 struct hfi1_opcode_stats *stats)
241 #ifdef CONFIG_DEBUG_FS
242 stats->n_bytes += tlen;
248 struct rvt_qp __rcu *qp[2];
249 struct rvt_ibport rvp;
251 __be64 guids[HFI1_GUIDS_PER_PORT - 1]; /* writable GUIDs */
253 /* the first 16 entries are sl_to_vl for !OPA */
259 struct rvt_dev_info rdi; /* Must be first */
261 /* QP numbers are shared by all IB ports */
262 /* protect wait lists */
263 seqlock_t iowait_lock;
264 struct list_head txwait; /* list for wait verbs_txreq */
265 struct list_head memwait; /* list for wait kernel memory */
266 struct list_head txreq_free;
267 struct kmem_cache *verbs_txreq_cache;
268 struct timer_list mem_timer;
274 #ifdef CONFIG_DEBUG_FS
275 /* per HFI debugfs */
276 struct dentry *hfi1_ibdev_dbg;
277 /* per HFI symlinks to above */
278 struct dentry *hfi1_ibdev_link;
282 struct hfi1_verbs_counters {
283 u64 symbol_error_counter;
284 u64 link_error_recovery_counter;
285 u64 link_downed_counter;
287 u64 port_rcv_remphys_errors;
288 u64 port_xmit_discards;
291 u64 port_xmit_packets;
292 u64 port_rcv_packets;
293 u32 local_link_integrity_errors;
294 u32 excessive_buffer_overrun_errors;
298 static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
300 struct rvt_dev_info *rdi;
302 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
303 return container_of(rdi, struct hfi1_ibdev, rdi);
306 static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
308 struct hfi1_qp_priv *priv;
310 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
315 * Send if not busy or waiting for I/O and either
316 * a RC response is pending or we can process send work requests.
318 static inline int hfi1_send_ok(struct rvt_qp *qp)
320 return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) &&
321 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) ||
322 !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
326 * This must be called with s_lock held.
328 void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
329 u32 qp1, u32 qp2, u16 lid1, u16 lid2);
330 void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
331 void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
332 void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
333 int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
334 const struct ib_wc *in_wc, const struct ib_grh *in_grh,
335 const struct ib_mad_hdr *in_mad, size_t in_mad_size,
336 struct ib_mad_hdr *out_mad, size_t *out_mad_size,
337 u16 *out_mad_pkey_index);
340 * The PSN_MASK and PSN_SHIFT allow for
341 * 1) comparing two PSNs
342 * 2) returning the PSN with any upper bits masked
343 * 3) returning the difference between to PSNs
345 * The number of significant bits in the PSN must
346 * necessarily be at least one bit less than
347 * the container holding the PSN.
349 #ifndef CONFIG_HFI1_VERBS_31BIT_PSN
350 #define PSN_MASK 0xFFFFFF
353 #define PSN_MASK 0x7FFFFFFF
356 #define PSN_MODIFY_MASK 0xFFFFFF
358 /* Number of bits to pay attention to in the opcode for checking qp type */
359 #define OPCODE_QP_MASK 0xE0
362 * Compare the lower 24 bits of the msn values.
363 * Returns an integer <, ==, or > than zero.
365 static inline int cmp_msn(u32 a, u32 b)
367 return (((int) a) - ((int) b)) << 8;
372 * Returns an integer <, ==, or > than zero.
374 static inline int cmp_psn(u32 a, u32 b)
376 return (((int) a) - ((int) b)) << PSN_SHIFT;
382 static inline u32 mask_psn(u32 a)
388 * Return delta between two PSNs
390 static inline u32 delta_psn(u32 a, u32 b)
392 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
396 void hfi1_put_txreq(struct verbs_txreq *tx);
398 int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
400 void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length,
401 int release, int copy_last);
403 void hfi1_skip_sge(struct rvt_sge_state *ss, u32 length, int release);
405 void hfi1_cnp_rcv(struct hfi1_packet *packet);
407 void hfi1_uc_rcv(struct hfi1_packet *packet);
409 void hfi1_rc_rcv(struct hfi1_packet *packet);
412 struct hfi1_ctxtdata *rcd,
413 struct hfi1_ib_header *hdr,
417 u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
419 struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid);
421 void hfi1_rc_rnr_retry(unsigned long arg);
423 void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_ib_header *hdr);
425 void hfi1_rc_error(struct rvt_qp *qp, enum ib_wc_status err);
427 void hfi1_ud_rcv(struct hfi1_packet *packet);
429 int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
431 int hfi1_rvt_get_rwqe(struct rvt_qp *qp, int wr_id_only);
433 void hfi1_migrate_qp(struct rvt_qp *qp);
435 int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
436 int attr_mask, struct ib_udata *udata);
438 void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
439 int attr_mask, struct ib_udata *udata);
441 int hfi1_check_send_wr(struct rvt_qp *qp, struct ib_send_wr *wr);
443 int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_ib_header *hdr,
444 int has_grh, struct rvt_qp *qp, u32 bth0);
446 u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
447 struct ib_global_route *grh, u32 hwords, u32 nwords);
449 void hfi1_make_ruc_header(struct rvt_qp *qp, struct hfi1_other_headers *ohdr,
450 u32 bth0, u32 bth2, int middle);
452 void _hfi1_do_send(struct work_struct *work);
454 void hfi1_do_send(struct rvt_qp *qp);
456 void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
457 enum ib_wc_status status);
459 void hfi1_send_rc_ack(struct hfi1_ctxtdata *, struct rvt_qp *qp, int is_fecn);
461 int hfi1_make_rc_req(struct rvt_qp *qp);
463 int hfi1_make_uc_req(struct rvt_qp *qp);
465 int hfi1_make_ud_req(struct rvt_qp *qp);
467 int hfi1_register_ib_device(struct hfi1_devdata *);
469 void hfi1_unregister_ib_device(struct hfi1_devdata *);
471 void hfi1_ib_rcv(struct hfi1_packet *packet);
473 unsigned hfi1_get_npkeys(struct hfi1_devdata *);
475 int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
478 int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
481 struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5);
483 extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
485 extern const u8 hdr_len_by_opcode[];
487 extern const int ib_rvt_state_ops[];
489 extern __be64 ib_hfi1_sys_image_guid; /* in network order */
491 extern unsigned int hfi1_max_cqes;
493 extern unsigned int hfi1_max_cqs;
495 extern unsigned int hfi1_max_qp_wrs;
497 extern unsigned int hfi1_max_qps;
499 extern unsigned int hfi1_max_sges;
501 extern unsigned int hfi1_max_mcast_grps;
503 extern unsigned int hfi1_max_mcast_qp_attached;
505 extern unsigned int hfi1_max_srqs;
507 extern unsigned int hfi1_max_srq_sges;
509 extern unsigned int hfi1_max_srq_wrs;
511 extern const u32 ib_hfi1_rnr_table[];
513 #endif /* HFI1_VERBS_H */