2 * Copyright(c) 2015-2017 Intel Corporation.
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 #include <linux/spinlock.h>
49 #include <linux/pci.h>
51 #include <linux/delay.h>
52 #include <linux/netdevice.h>
53 #include <linux/vmalloc.h>
54 #include <linux/module.h>
55 #include <linux/prefetch.h>
56 #include <rdma/ib_verbs.h>
66 #define pr_fmt(fmt) DRIVER_NAME ": " fmt
69 * The size has to be longer than this string, so we can append
70 * board/chip information to it in the initialization code.
72 const char ib_hfi1_version[] = HFI1_DRIVER_VERSION "\n";
74 DEFINE_SPINLOCK(hfi1_devs_lock);
75 LIST_HEAD(hfi1_dev_list);
76 DEFINE_MUTEX(hfi1_mutex); /* general driver use */
78 unsigned int hfi1_max_mtu = HFI1_DEFAULT_MAX_MTU;
79 module_param_named(max_mtu, hfi1_max_mtu, uint, S_IRUGO);
80 MODULE_PARM_DESC(max_mtu, "Set max MTU bytes, default is " __stringify(
81 HFI1_DEFAULT_MAX_MTU));
83 unsigned int hfi1_cu = 1;
84 module_param_named(cu, hfi1_cu, uint, S_IRUGO);
85 MODULE_PARM_DESC(cu, "Credit return units");
87 unsigned long hfi1_cap_mask = HFI1_CAP_MASK_DEFAULT;
88 static int hfi1_caps_set(const char *val, const struct kernel_param *kp);
89 static int hfi1_caps_get(char *buffer, const struct kernel_param *kp);
90 static const struct kernel_param_ops cap_ops = {
94 module_param_cb(cap_mask, &cap_ops, &hfi1_cap_mask, S_IWUSR | S_IRUGO);
95 MODULE_PARM_DESC(cap_mask, "Bit mask of enabled/disabled HW features");
97 MODULE_LICENSE("Dual BSD/GPL");
98 MODULE_DESCRIPTION("Intel Omni-Path Architecture driver");
101 * MAX_PKT_RCV is the max # if packets processed per receive interrupt.
103 #define MAX_PKT_RECV 64
105 * MAX_PKT_THREAD_RCV is the max # of packets processed before
106 * the qp_wait_list queue is flushed.
108 #define MAX_PKT_RECV_THREAD (MAX_PKT_RECV * 4)
109 #define EGR_HEAD_UPDATE_THRESHOLD 16
111 struct hfi1_ib_stats hfi1_stats;
113 static int hfi1_caps_set(const char *val, const struct kernel_param *kp)
116 unsigned long *cap_mask_ptr = (unsigned long *)kp->arg,
117 cap_mask = *cap_mask_ptr, value, diff,
118 write_mask = ((HFI1_CAP_WRITABLE_MASK << HFI1_CAP_USER_SHIFT) |
119 HFI1_CAP_WRITABLE_MASK);
121 ret = kstrtoul(val, 0, &value);
123 pr_warn("Invalid module parameter value for 'cap_mask'\n");
126 /* Get the changed bits (except the locked bit) */
127 diff = value ^ (cap_mask & ~HFI1_CAP_LOCKED_SMASK);
129 /* Remove any bits that are not allowed to change after driver load */
130 if (HFI1_CAP_LOCKED() && (diff & ~write_mask)) {
131 pr_warn("Ignoring non-writable capability bits %#lx\n",
136 /* Mask off any reserved bits */
137 diff &= ~HFI1_CAP_RESERVED_MASK;
138 /* Clear any previously set and changing bits */
140 /* Update the bits with the new capability */
141 cap_mask |= (value & diff);
142 /* Check for any kernel/user restrictions */
143 diff = (cap_mask & (HFI1_CAP_MUST_HAVE_KERN << HFI1_CAP_USER_SHIFT)) ^
144 ((cap_mask & HFI1_CAP_MUST_HAVE_KERN) << HFI1_CAP_USER_SHIFT);
146 /* Set the bitmask to the final set */
147 *cap_mask_ptr = cap_mask;
152 static int hfi1_caps_get(char *buffer, const struct kernel_param *kp)
154 unsigned long cap_mask = *(unsigned long *)kp->arg;
156 cap_mask &= ~HFI1_CAP_LOCKED_SMASK;
157 cap_mask |= ((cap_mask & HFI1_CAP_K2U) << HFI1_CAP_USER_SHIFT);
159 return scnprintf(buffer, PAGE_SIZE, "0x%lx", cap_mask);
162 const char *get_unit_name(int unit)
164 static char iname[16];
166 snprintf(iname, sizeof(iname), DRIVER_NAME "_%u", unit);
170 const char *get_card_name(struct rvt_dev_info *rdi)
172 struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi);
173 struct hfi1_devdata *dd = container_of(ibdev,
174 struct hfi1_devdata, verbs_dev);
175 return get_unit_name(dd->unit);
178 struct pci_dev *get_pci_dev(struct rvt_dev_info *rdi)
180 struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi);
181 struct hfi1_devdata *dd = container_of(ibdev,
182 struct hfi1_devdata, verbs_dev);
187 * Return count of units with at least one port ACTIVE.
189 int hfi1_count_active_units(void)
191 struct hfi1_devdata *dd;
192 struct hfi1_pportdata *ppd;
194 int pidx, nunits_active = 0;
196 spin_lock_irqsave(&hfi1_devs_lock, flags);
197 list_for_each_entry(dd, &hfi1_dev_list, list) {
198 if (!(dd->flags & HFI1_PRESENT) || !dd->kregbase1)
200 for (pidx = 0; pidx < dd->num_pports; ++pidx) {
201 ppd = dd->pport + pidx;
202 if (ppd->lid && ppd->linkup) {
208 spin_unlock_irqrestore(&hfi1_devs_lock, flags);
209 return nunits_active;
213 * Get address of eager buffer from it's index (allocated in chunks, not
216 static inline void *get_egrbuf(const struct hfi1_ctxtdata *rcd, u64 rhf,
219 u32 idx = rhf_egr_index(rhf), offset = rhf_egr_buf_offset(rhf);
221 *update |= !(idx & (rcd->egrbufs.threshold - 1)) && !offset;
222 return (void *)(((u64)(rcd->egrbufs.rcvtids[idx].addr)) +
223 (offset * RCV_BUF_BLOCK_SIZE));
226 static inline void *hfi1_get_header(struct hfi1_devdata *dd,
229 u32 offset = rhf_hdrq_offset(rhf_to_cpu(rhf_addr));
231 return (void *)(rhf_addr - dd->rhf_offset + offset);
234 static inline struct ib_header *hfi1_get_msgheader(struct hfi1_devdata *dd,
237 return (struct ib_header *)hfi1_get_header(dd, rhf_addr);
240 static inline struct hfi1_16b_header
241 *hfi1_get_16B_header(struct hfi1_devdata *dd,
244 return (struct hfi1_16b_header *)hfi1_get_header(dd, rhf_addr);
248 * Validate and encode the a given RcvArray Buffer size.
249 * The function will check whether the given size falls within
250 * allowed size ranges for the respective type and, optionally,
251 * return the proper encoding.
253 int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encoded)
255 if (unlikely(!PAGE_ALIGNED(size)))
257 if (unlikely(size < MIN_EAGER_BUFFER))
260 (type == PT_EAGER ? MAX_EAGER_BUFFER : MAX_EXPECTED_BUFFER))
263 *encoded = ilog2(size / PAGE_SIZE) + 1;
267 static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
268 struct hfi1_packet *packet)
270 struct ib_header *rhdr = packet->hdr;
271 u32 rte = rhf_rcv_type_err(packet->rhf);
273 struct hfi1_ibport *ibp = rcd_to_iport(rcd);
274 struct hfi1_devdata *dd = ppd->dd;
275 struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
277 if (packet->rhf & (RHF_VCRC_ERR | RHF_ICRC_ERR))
280 if (packet->etype == RHF_RCV_TYPE_BYPASS) {
283 u8 lnh = ib_get_lnh(rhdr);
285 mlid_base = be16_to_cpu(IB_MULTICAST_LID_BASE);
286 if (lnh == HFI1_LRH_BTH) {
287 packet->ohdr = &rhdr->u.oth;
288 } else if (lnh == HFI1_LRH_GRH) {
289 packet->ohdr = &rhdr->u.l.oth;
290 packet->grh = &rhdr->u.l.grh;
296 if (packet->rhf & RHF_TID_ERR) {
297 /* For TIDERR and RC QPs preemptively schedule a NAK */
298 u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */
299 u32 dlid = ib_get_dlid(rhdr);
302 /* Sanity check packet */
309 struct ib_grh *grh = packet->grh;
311 if (grh->next_hdr != IB_GRH_NEXT_HDR)
313 vtf = be32_to_cpu(grh->version_tclass_flow);
314 if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
318 /* Get the destination QP number. */
319 qp_num = ib_bth_get_qpn(packet->ohdr);
320 if (dlid < mlid_base) {
325 qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
332 * Handle only RC QPs - for other QP types drop error
335 spin_lock_irqsave(&qp->r_lock, flags);
337 /* Check for valid receive state. */
338 if (!(ib_rvt_state_ops[qp->state] &
339 RVT_PROCESS_RECV_OK)) {
340 ibp->rvp.n_pkt_drops++;
343 switch (qp->ibqp.qp_type) {
345 hfi1_rc_hdrerr(rcd, packet, qp);
348 /* For now don't handle any other QP types */
352 spin_unlock_irqrestore(&qp->r_lock, flags);
355 } /* Valid packet with TIDErr */
357 /* handle "RcvTypeErr" flags */
359 case RHF_RTE_ERROR_OP_CODE_ERR:
364 if (rhf_use_egr_bfr(packet->rhf))
368 goto drop; /* this should never happen */
370 opcode = ib_bth_get_opcode(packet->ohdr);
371 if (opcode == IB_OPCODE_CNP) {
373 * Only in pre-B0 h/w is the CNP_OPCODE handled
374 * via this code path.
376 struct rvt_qp *qp = NULL;
379 u8 svc_type, sl, sc5;
381 sc5 = hfi1_9B_get_sc5(rhdr, packet->rhf);
382 sl = ibp->sc_to_sl[sc5];
384 lqpn = ib_bth_get_qpn(packet->ohdr);
386 qp = rvt_lookup_qpn(rdi, &ibp->rvp, lqpn);
392 switch (qp->ibqp.qp_type) {
396 svc_type = IB_CC_SVCTYPE_UD;
399 rlid = ib_get_slid(rhdr);
400 rqpn = qp->remote_qpn;
401 svc_type = IB_CC_SVCTYPE_UC;
407 process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
411 packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK;
422 static inline void init_packet(struct hfi1_ctxtdata *rcd,
423 struct hfi1_packet *packet)
425 packet->rsize = rcd->rcvhdrqentsize; /* words */
426 packet->maxcnt = rcd->rcvhdrq_cnt * packet->rsize; /* words */
430 packet->rhf_addr = get_rhf_addr(rcd);
431 packet->rhf = rhf_to_cpu(packet->rhf_addr);
432 packet->rhqoff = rcd->head;
436 void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt,
439 struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
440 struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
441 struct ib_other_headers *ohdr = pkt->ohdr;
442 struct ib_grh *grh = pkt->grh;
445 u32 rlid, slid, dlid = 0;
446 u8 hdr_type, sc, svc_type;
447 bool is_mcast = false;
449 /* can be called from prescan */
450 if (pkt->etype == RHF_RCV_TYPE_BYPASS) {
451 is_mcast = hfi1_is_16B_mcast(dlid);
452 pkey = hfi1_16B_get_pkey(pkt->hdr);
453 sc = hfi1_16B_get_sc(pkt->hdr);
454 dlid = hfi1_16B_get_dlid(pkt->hdr);
455 slid = hfi1_16B_get_slid(pkt->hdr);
456 hdr_type = HFI1_PKT_TYPE_16B;
458 is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
459 (dlid != be16_to_cpu(IB_LID_PERMISSIVE));
460 pkey = ib_bth_get_pkey(ohdr);
461 sc = hfi1_9B_get_sc5(pkt->hdr, pkt->rhf);
462 dlid = ib_get_dlid(pkt->hdr);
463 slid = ib_get_slid(pkt->hdr);
464 hdr_type = HFI1_PKT_TYPE_9B;
467 switch (qp->ibqp.qp_type) {
471 rqpn = ib_get_sqpn(pkt->ohdr);
472 svc_type = IB_CC_SVCTYPE_UD;
477 rqpn = ib_get_sqpn(pkt->ohdr);
478 svc_type = IB_CC_SVCTYPE_UD;
481 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
482 rqpn = qp->remote_qpn;
483 svc_type = IB_CC_SVCTYPE_UC;
486 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
487 rqpn = qp->remote_qpn;
488 svc_type = IB_CC_SVCTYPE_RC;
494 bth1 = be32_to_cpu(ohdr->bth[1]);
495 /* Call appropriate CNP handler */
496 if (do_cnp && (bth1 & IB_FECN_SMASK))
497 hfi1_handle_cnp_tbl[hdr_type](ibp, qp, rqpn, pkey,
498 dlid, rlid, sc, grh);
500 if (!is_mcast && (bth1 & IB_BECN_SMASK)) {
501 u32 lqpn = bth1 & RVT_QPN_MASK;
502 u8 sl = ibp->sc_to_sl[sc];
504 process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
510 struct hfi1_ctxtdata *rcd;
518 static inline void init_ps_mdata(struct ps_mdata *mdata,
519 struct hfi1_packet *packet)
521 struct hfi1_ctxtdata *rcd = packet->rcd;
524 mdata->rsize = packet->rsize;
525 mdata->maxcnt = packet->maxcnt;
526 mdata->ps_head = packet->rhqoff;
528 if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) {
529 mdata->ps_tail = get_rcvhdrtail(rcd);
530 if (rcd->ctxt == HFI1_CTRL_CTXT)
531 mdata->ps_seq = rcd->seq_cnt;
533 mdata->ps_seq = 0; /* not used with DMA_RTAIL */
535 mdata->ps_tail = 0; /* used only with DMA_RTAIL*/
536 mdata->ps_seq = rcd->seq_cnt;
540 static inline int ps_done(struct ps_mdata *mdata, u64 rhf,
541 struct hfi1_ctxtdata *rcd)
543 if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL))
544 return mdata->ps_head == mdata->ps_tail;
545 return mdata->ps_seq != rhf_rcv_seq(rhf);
548 static inline int ps_skip(struct ps_mdata *mdata, u64 rhf,
549 struct hfi1_ctxtdata *rcd)
552 * Control context can potentially receive an invalid rhf.
555 if ((rcd->ctxt == HFI1_CTRL_CTXT) && (mdata->ps_head != mdata->ps_tail))
556 return mdata->ps_seq != rhf_rcv_seq(rhf);
561 static inline void update_ps_mdata(struct ps_mdata *mdata,
562 struct hfi1_ctxtdata *rcd)
564 mdata->ps_head += mdata->rsize;
565 if (mdata->ps_head >= mdata->maxcnt)
568 /* Control context must do seq counting */
569 if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL) ||
570 (rcd->ctxt == HFI1_CTRL_CTXT)) {
571 if (++mdata->ps_seq > 13)
577 * prescan_rxq - search through the receive queue looking for packets
578 * containing Excplicit Congestion Notifications (FECNs, or BECNs).
579 * When an ECN is found, process the Congestion Notification, and toggle
581 * This is declared as a macro to allow quick checking of the port to avoid
582 * the overhead of a function call if not enabled.
584 #define prescan_rxq(rcd, packet) \
586 if (rcd->ppd->cc_prescan) \
587 __prescan_rxq(packet); \
589 static void __prescan_rxq(struct hfi1_packet *packet)
591 struct hfi1_ctxtdata *rcd = packet->rcd;
592 struct ps_mdata mdata;
594 init_ps_mdata(&mdata, packet);
597 struct hfi1_devdata *dd = rcd->dd;
598 struct hfi1_ibport *ibp = rcd_to_iport(rcd);
599 __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +
602 struct ib_header *hdr;
603 struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
604 u64 rhf = rhf_to_cpu(rhf_addr);
605 u32 etype = rhf_rcv_type(rhf), qpn, bth1;
609 if (ps_done(&mdata, rhf, rcd))
612 if (ps_skip(&mdata, rhf, rcd))
615 if (etype != RHF_RCV_TYPE_IB)
618 packet->hdr = hfi1_get_msgheader(dd, rhf_addr);
620 lnh = ib_get_lnh(hdr);
622 if (lnh == HFI1_LRH_BTH) {
623 packet->ohdr = &hdr->u.oth;
625 } else if (lnh == HFI1_LRH_GRH) {
626 packet->ohdr = &hdr->u.l.oth;
627 packet->grh = &hdr->u.l.grh;
629 goto next; /* just in case */
632 bth1 = be32_to_cpu(packet->ohdr->bth[1]);
633 is_ecn = !!(bth1 & (IB_FECN_SMASK | IB_BECN_SMASK));
638 qpn = bth1 & RVT_QPN_MASK;
640 qp = rvt_lookup_qpn(rdi, &ibp->rvp, qpn);
647 process_ecn(qp, packet, true);
650 /* turn off BECN, FECN */
651 bth1 &= ~(IB_FECN_SMASK | IB_BECN_SMASK);
652 packet->ohdr->bth[1] = cpu_to_be32(bth1);
654 update_ps_mdata(&mdata, rcd);
658 static void process_rcv_qp_work(struct hfi1_ctxtdata *rcd)
660 struct rvt_qp *qp, *nqp;
663 * Iterate over all QPs waiting to respond.
664 * The list won't change since the IRQ is only run on one CPU.
666 list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) {
667 list_del_init(&qp->rspwait);
668 if (qp->r_flags & RVT_R_RSP_NAK) {
669 qp->r_flags &= ~RVT_R_RSP_NAK;
670 hfi1_send_rc_ack(rcd, qp, 0);
672 if (qp->r_flags & RVT_R_RSP_SEND) {
675 qp->r_flags &= ~RVT_R_RSP_SEND;
676 spin_lock_irqsave(&qp->s_lock, flags);
677 if (ib_rvt_state_ops[qp->state] &
678 RVT_PROCESS_OR_FLUSH_SEND)
679 hfi1_schedule_send(qp);
680 spin_unlock_irqrestore(&qp->s_lock, flags);
686 static noinline int max_packet_exceeded(struct hfi1_packet *packet, int thread)
689 if ((packet->numpkt & (MAX_PKT_RECV_THREAD - 1)) == 0)
690 /* allow defered processing */
691 process_rcv_qp_work(packet->rcd);
695 this_cpu_inc(*packet->rcd->dd->rcv_limit);
696 return RCV_PKT_LIMIT;
700 static inline int check_max_packet(struct hfi1_packet *packet, int thread)
702 int ret = RCV_PKT_OK;
704 if (unlikely((packet->numpkt & (MAX_PKT_RECV - 1)) == 0))
705 ret = max_packet_exceeded(packet, thread);
709 static noinline int skip_rcv_packet(struct hfi1_packet *packet, int thread)
713 packet->rcd->dd->ctx0_seq_drop++;
714 /* Set up for the next packet */
715 packet->rhqoff += packet->rsize;
716 if (packet->rhqoff >= packet->maxcnt)
720 ret = check_max_packet(packet, thread);
722 packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff +
723 packet->rcd->dd->rhf_offset;
724 packet->rhf = rhf_to_cpu(packet->rhf_addr);
729 static inline int process_rcv_packet(struct hfi1_packet *packet, int thread)
733 packet->etype = rhf_rcv_type(packet->rhf);
736 packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */
737 /* retrieve eager buffer details */
739 if (rhf_use_egr_bfr(packet->rhf)) {
740 packet->etail = rhf_egr_index(packet->rhf);
741 packet->ebuf = get_egrbuf(packet->rcd, packet->rhf,
744 * Prefetch the contents of the eager buffer. It is
745 * OK to send a negative length to prefetch_range().
746 * The +2 is the size of the RHF.
748 prefetch_range(packet->ebuf,
749 packet->tlen - ((packet->rcd->rcvhdrqentsize -
750 (rhf_hdrq_offset(packet->rhf)
755 * Call a type specific handler for the packet. We
756 * should be able to trust that etype won't be beyond
757 * the range of valid indexes. If so something is really
758 * wrong and we can probably just let things come
759 * crashing down. There is no need to eat another
760 * comparison in this performance critical code.
762 packet->rcd->dd->rhf_rcv_function_map[packet->etype](packet);
765 /* Set up for the next packet */
766 packet->rhqoff += packet->rsize;
767 if (packet->rhqoff >= packet->maxcnt)
770 ret = check_max_packet(packet, thread);
772 packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff +
773 packet->rcd->dd->rhf_offset;
774 packet->rhf = rhf_to_cpu(packet->rhf_addr);
779 static inline void process_rcv_update(int last, struct hfi1_packet *packet)
782 * Update head regs etc., every 16 packets, if not last pkt,
783 * to help prevent rcvhdrq overflows, when many packets
784 * are processed and queue is nearly full.
785 * Don't request an interrupt for intermediate updates.
787 if (!last && !(packet->numpkt & 0xf)) {
788 update_usrhead(packet->rcd, packet->rhqoff, packet->updegr,
789 packet->etail, 0, 0);
795 static inline void finish_packet(struct hfi1_packet *packet)
798 * Nothing we need to free for the packet.
800 * The only thing we need to do is a final update and call for an
803 update_usrhead(packet->rcd, packet->rcd->head, packet->updegr,
804 packet->etail, rcv_intr_dynamic, packet->numpkt);
808 * Handle receive interrupts when using the no dma rtail option.
810 int handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd, int thread)
813 int last = RCV_PKT_OK;
814 struct hfi1_packet packet;
816 init_packet(rcd, &packet);
817 seq = rhf_rcv_seq(packet.rhf);
818 if (seq != rcd->seq_cnt) {
823 prescan_rxq(rcd, &packet);
825 while (last == RCV_PKT_OK) {
826 last = process_rcv_packet(&packet, thread);
827 seq = rhf_rcv_seq(packet.rhf);
828 if (++rcd->seq_cnt > 13)
830 if (seq != rcd->seq_cnt)
832 process_rcv_update(last, &packet);
834 process_rcv_qp_work(rcd);
835 rcd->head = packet.rhqoff;
837 finish_packet(&packet);
841 int handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd, int thread)
844 int last = RCV_PKT_OK;
845 struct hfi1_packet packet;
847 init_packet(rcd, &packet);
848 hdrqtail = get_rcvhdrtail(rcd);
849 if (packet.rhqoff == hdrqtail) {
853 smp_rmb(); /* prevent speculative reads of dma'ed hdrq */
855 prescan_rxq(rcd, &packet);
857 while (last == RCV_PKT_OK) {
858 last = process_rcv_packet(&packet, thread);
859 if (packet.rhqoff == hdrqtail)
861 process_rcv_update(last, &packet);
863 process_rcv_qp_work(rcd);
864 rcd->head = packet.rhqoff;
866 finish_packet(&packet);
870 static inline void set_nodma_rtail(struct hfi1_devdata *dd, u16 ctxt)
872 struct hfi1_ctxtdata *rcd;
876 * For dynamically allocated kernel contexts (like vnic) switch
877 * interrupt handler only for that context. Otherwise, switch
878 * interrupt handler for all statically allocated kernel contexts.
880 if (ctxt >= dd->first_dyn_alloc_ctxt) {
881 rcd = hfi1_rcd_get_by_index(dd, ctxt);
884 &handle_receive_interrupt_nodma_rtail;
890 for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) {
891 rcd = hfi1_rcd_get_by_index(dd, i);
894 &handle_receive_interrupt_nodma_rtail;
899 static inline void set_dma_rtail(struct hfi1_devdata *dd, u16 ctxt)
901 struct hfi1_ctxtdata *rcd;
905 * For dynamically allocated kernel contexts (like vnic) switch
906 * interrupt handler only for that context. Otherwise, switch
907 * interrupt handler for all statically allocated kernel contexts.
909 if (ctxt >= dd->first_dyn_alloc_ctxt) {
910 rcd = hfi1_rcd_get_by_index(dd, ctxt);
913 &handle_receive_interrupt_dma_rtail;
919 for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) {
920 rcd = hfi1_rcd_get_by_index(dd, i);
923 &handle_receive_interrupt_dma_rtail;
928 void set_all_slowpath(struct hfi1_devdata *dd)
930 struct hfi1_ctxtdata *rcd;
933 /* HFI1_CTRL_CTXT must always use the slow path interrupt handler */
934 for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) {
935 rcd = hfi1_rcd_get_by_index(dd, i);
938 if ((i < dd->first_dyn_alloc_ctxt) ||
939 (rcd->sc && (rcd->sc->type == SC_KERNEL))) {
940 rcd->do_interrupt = &handle_receive_interrupt;
946 static inline int set_armed_to_active(struct hfi1_ctxtdata *rcd,
947 struct hfi1_packet *packet,
948 struct hfi1_devdata *dd)
950 struct work_struct *lsaw = &rcd->ppd->linkstate_active_work;
951 u8 etype = rhf_rcv_type(packet->rhf);
954 if (etype == RHF_RCV_TYPE_IB) {
955 struct ib_header *hdr = hfi1_get_msgheader(packet->rcd->dd,
957 sc = hfi1_9B_get_sc5(hdr, packet->rhf);
958 } else if (etype == RHF_RCV_TYPE_BYPASS) {
959 struct hfi1_16b_header *hdr = hfi1_get_16B_header(
962 sc = hfi1_16B_get_sc(hdr);
964 if (sc != SC15_PACKET) {
965 int hwstate = driver_lstate(rcd->ppd);
967 if (hwstate != IB_PORT_ACTIVE) {
969 "Unexpected link state %s\n",
970 opa_lstate_name(hwstate));
974 queue_work(rcd->ppd->link_wq, lsaw);
981 * handle_receive_interrupt - receive a packet
984 * Called from interrupt handler for errors or receive interrupt.
985 * This is the slow path interrupt handler.
987 int handle_receive_interrupt(struct hfi1_ctxtdata *rcd, int thread)
989 struct hfi1_devdata *dd = rcd->dd;
991 int needset, last = RCV_PKT_OK;
992 struct hfi1_packet packet;
995 /* Control context will always use the slow path interrupt handler */
996 needset = (rcd->ctxt == HFI1_CTRL_CTXT) ? 0 : 1;
998 init_packet(rcd, &packet);
1000 if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) {
1001 u32 seq = rhf_rcv_seq(packet.rhf);
1003 if (seq != rcd->seq_cnt) {
1004 last = RCV_PKT_DONE;
1009 hdrqtail = get_rcvhdrtail(rcd);
1010 if (packet.rhqoff == hdrqtail) {
1011 last = RCV_PKT_DONE;
1014 smp_rmb(); /* prevent speculative reads of dma'ed hdrq */
1017 * Control context can potentially receive an invalid
1018 * rhf. Drop such packets.
1020 if (rcd->ctxt == HFI1_CTRL_CTXT) {
1021 u32 seq = rhf_rcv_seq(packet.rhf);
1023 if (seq != rcd->seq_cnt)
1028 prescan_rxq(rcd, &packet);
1030 while (last == RCV_PKT_OK) {
1031 if (unlikely(dd->do_drop &&
1032 atomic_xchg(&dd->drop_packet, DROP_PACKET_OFF) ==
1036 /* On to the next packet */
1037 packet.rhqoff += packet.rsize;
1038 packet.rhf_addr = (__le32 *)rcd->rcvhdrq +
1041 packet.rhf = rhf_to_cpu(packet.rhf_addr);
1043 } else if (skip_pkt) {
1044 last = skip_rcv_packet(&packet, thread);
1047 /* Auto activate link on non-SC15 packet receive */
1048 if (unlikely(rcd->ppd->host_link_state ==
1050 set_armed_to_active(rcd, &packet, dd))
1052 last = process_rcv_packet(&packet, thread);
1055 if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) {
1056 u32 seq = rhf_rcv_seq(packet.rhf);
1058 if (++rcd->seq_cnt > 13)
1060 if (seq != rcd->seq_cnt)
1061 last = RCV_PKT_DONE;
1063 dd_dev_info(dd, "Switching to NO_DMA_RTAIL\n");
1064 set_nodma_rtail(dd, rcd->ctxt);
1068 if (packet.rhqoff == hdrqtail)
1069 last = RCV_PKT_DONE;
1071 * Control context can potentially receive an invalid
1072 * rhf. Drop such packets.
1074 if (rcd->ctxt == HFI1_CTRL_CTXT) {
1075 u32 seq = rhf_rcv_seq(packet.rhf);
1077 if (++rcd->seq_cnt > 13)
1079 if (!last && (seq != rcd->seq_cnt))
1085 "Switching to DMA_RTAIL\n");
1086 set_dma_rtail(dd, rcd->ctxt);
1091 process_rcv_update(last, &packet);
1094 process_rcv_qp_work(rcd);
1095 rcd->head = packet.rhqoff;
1099 * Always write head at end, and setup rcv interrupt, even
1100 * if no packets were processed.
1102 finish_packet(&packet);
1107 * We may discover in the interrupt that the hardware link state has
1108 * changed from ARMED to ACTIVE (due to the arrival of a non-SC15 packet),
1109 * and we need to update the driver's notion of the link state. We cannot
1110 * run set_link_state from interrupt context, so we queue this function on
1113 * We delay the regular interrupt processing until after the state changes
1114 * so that the link will be in the correct state by the time any application
1115 * we wake up attempts to send a reply to any message it received.
1116 * (Subsequent receive interrupts may possibly force the wakeup before we
1117 * update the link state.)
1119 * The rcd is freed in hfi1_free_ctxtdata after hfi1_postinit_cleanup invokes
1120 * dd->f_cleanup(dd) to disable the interrupt handler and flush workqueues,
1121 * so we're safe from use-after-free of the rcd.
1123 void receive_interrupt_work(struct work_struct *work)
1125 struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
1126 linkstate_active_work);
1127 struct hfi1_devdata *dd = ppd->dd;
1128 struct hfi1_ctxtdata *rcd;
1131 /* Received non-SC15 packet implies neighbor_normal */
1132 ppd->neighbor_normal = 1;
1133 set_link_state(ppd, HLS_UP_ACTIVE);
1136 * Interrupt all statically allocated kernel contexts that could
1137 * have had an interrupt during auto activation.
1139 for (i = HFI1_CTRL_CTXT; i < dd->first_dyn_alloc_ctxt; i++) {
1140 rcd = hfi1_rcd_get_by_index(dd, i);
1142 force_recv_intr(rcd);
1148 * Convert a given MTU size to the on-wire MAD packet enumeration.
1149 * Return -1 if the size is invalid.
1151 int mtu_to_enum(u32 mtu, int default_if_bad)
1154 case 0: return OPA_MTU_0;
1155 case 256: return OPA_MTU_256;
1156 case 512: return OPA_MTU_512;
1157 case 1024: return OPA_MTU_1024;
1158 case 2048: return OPA_MTU_2048;
1159 case 4096: return OPA_MTU_4096;
1160 case 8192: return OPA_MTU_8192;
1161 case 10240: return OPA_MTU_10240;
1163 return default_if_bad;
1166 u16 enum_to_mtu(int mtu)
1169 case OPA_MTU_0: return 0;
1170 case OPA_MTU_256: return 256;
1171 case OPA_MTU_512: return 512;
1172 case OPA_MTU_1024: return 1024;
1173 case OPA_MTU_2048: return 2048;
1174 case OPA_MTU_4096: return 4096;
1175 case OPA_MTU_8192: return 8192;
1176 case OPA_MTU_10240: return 10240;
1177 default: return 0xffff;
1182 * set_mtu - set the MTU
1183 * @ppd: the per port data
1185 * We can handle "any" incoming size, the issue here is whether we
1186 * need to restrict our outgoing size. We do not deal with what happens
1187 * to programs that are already running when the size changes.
1189 int set_mtu(struct hfi1_pportdata *ppd)
1191 struct hfi1_devdata *dd = ppd->dd;
1192 int i, drain, ret = 0, is_up = 0;
1195 for (i = 0; i < ppd->vls_supported; i++)
1196 if (ppd->ibmtu < dd->vld[i].mtu)
1197 ppd->ibmtu = dd->vld[i].mtu;
1198 ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd);
1200 mutex_lock(&ppd->hls_lock);
1201 if (ppd->host_link_state == HLS_UP_INIT ||
1202 ppd->host_link_state == HLS_UP_ARMED ||
1203 ppd->host_link_state == HLS_UP_ACTIVE)
1206 drain = !is_ax(dd) && is_up;
1210 * MTU is specified per-VL. To ensure that no packet gets
1211 * stuck (due, e.g., to the MTU for the packet's VL being
1212 * reduced), empty the per-VL FIFOs before adjusting MTU.
1214 ret = stop_drain_data_vls(dd);
1217 dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n",
1222 hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0);
1225 open_fill_data_vls(dd); /* reopen all VLs */
1228 mutex_unlock(&ppd->hls_lock);
1233 int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc)
1235 struct hfi1_devdata *dd = ppd->dd;
1239 hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0);
1241 dd_dev_info(dd, "port %u: got a lid: 0x%x\n", ppd->port, lid);
1246 void shutdown_led_override(struct hfi1_pportdata *ppd)
1248 struct hfi1_devdata *dd = ppd->dd;
1251 * This pairs with the memory barrier in hfi1_start_led_override to
1252 * ensure that we read the correct state of LED beaconing represented
1253 * by led_override_timer_active
1256 if (atomic_read(&ppd->led_override_timer_active)) {
1257 del_timer_sync(&ppd->led_override_timer);
1258 atomic_set(&ppd->led_override_timer_active, 0);
1259 /* Ensure the atomic_set is visible to all CPUs */
1263 /* Hand control of the LED to the DC for normal operation */
1264 write_csr(dd, DCC_CFG_LED_CNTRL, 0);
1267 static void run_led_override(unsigned long opaque)
1269 struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)opaque;
1270 struct hfi1_devdata *dd = ppd->dd;
1271 unsigned long timeout;
1274 if (!(dd->flags & HFI1_INITTED))
1277 phase_idx = ppd->led_override_phase & 1;
1279 setextled(dd, phase_idx);
1281 timeout = ppd->led_override_vals[phase_idx];
1283 /* Set up for next phase */
1284 ppd->led_override_phase = !ppd->led_override_phase;
1286 mod_timer(&ppd->led_override_timer, jiffies + timeout);
1290 * To have the LED blink in a particular pattern, provide timeon and timeoff
1292 * To turn off custom blinking and return to normal operation, use
1293 * shutdown_led_override()
1295 void hfi1_start_led_override(struct hfi1_pportdata *ppd, unsigned int timeon,
1296 unsigned int timeoff)
1298 if (!(ppd->dd->flags & HFI1_INITTED))
1301 /* Convert to jiffies for direct use in timer */
1302 ppd->led_override_vals[0] = msecs_to_jiffies(timeoff);
1303 ppd->led_override_vals[1] = msecs_to_jiffies(timeon);
1305 /* Arbitrarily start from LED on phase */
1306 ppd->led_override_phase = 1;
1309 * If the timer has not already been started, do so. Use a "quick"
1310 * timeout so the handler will be called soon to look at our request.
1312 if (!timer_pending(&ppd->led_override_timer)) {
1313 setup_timer(&ppd->led_override_timer, run_led_override,
1314 (unsigned long)ppd);
1315 ppd->led_override_timer.expires = jiffies + 1;
1316 add_timer(&ppd->led_override_timer);
1317 atomic_set(&ppd->led_override_timer_active, 1);
1318 /* Ensure the atomic_set is visible to all CPUs */
1324 * hfi1_reset_device - reset the chip if possible
1325 * @unit: the device to reset
1327 * Whether or not reset is successful, we attempt to re-initialize the chip
1328 * (that is, much like a driver unload/reload). We clear the INITTED flag
1329 * so that the various entry points will fail until we reinitialize. For
1330 * now, we only allow this if no user contexts are open that use chip resources
1332 int hfi1_reset_device(int unit)
1335 struct hfi1_devdata *dd = hfi1_lookup(unit);
1336 struct hfi1_pportdata *ppd;
1344 dd_dev_info(dd, "Reset on unit %u requested\n", unit);
1346 if (!dd->kregbase1 || !(dd->flags & HFI1_PRESENT)) {
1348 "Invalid unit number %u or not initialized or not present\n",
1354 /* If there are any user/vnic contexts, we cannot reset */
1355 mutex_lock(&hfi1_mutex);
1357 if (hfi1_stats.sps_ctxts) {
1358 mutex_unlock(&hfi1_mutex);
1362 mutex_unlock(&hfi1_mutex);
1364 for (pidx = 0; pidx < dd->num_pports; ++pidx) {
1365 ppd = dd->pport + pidx;
1367 shutdown_led_override(ppd);
1369 if (dd->flags & HFI1_HAS_SEND_DMA)
1372 hfi1_reset_cpu_counters(dd);
1374 ret = hfi1_init(dd, 1);
1378 "Reinitialize unit %u after reset failed with %d\n",
1381 dd_dev_info(dd, "Reinitialized unit %u after resetting\n",
1388 static inline void hfi1_setup_ib_header(struct hfi1_packet *packet)
1390 packet->hdr = (struct hfi1_ib_message_header *)
1391 hfi1_get_msgheader(packet->rcd->dd,
1393 packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
1396 static int hfi1_bypass_ingress_pkt_check(struct hfi1_packet *packet)
1398 struct hfi1_pportdata *ppd = packet->rcd->ppd;
1400 /* slid and dlid cannot be 0 */
1401 if ((!packet->slid) || (!packet->dlid))
1404 /* Compare port lid with incoming packet dlid */
1405 if ((!(hfi1_is_16B_mcast(packet->dlid))) &&
1407 opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B))) {
1408 if (packet->dlid != ppd->lid)
1412 /* No multicast packets with SC15 */
1413 if ((hfi1_is_16B_mcast(packet->dlid)) && (packet->sc == 0xF))
1416 /* Packets with permissive DLID always on SC15 */
1417 if ((packet->dlid == opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE),
1419 (packet->sc != 0xF))
1425 static int hfi1_setup_9B_packet(struct hfi1_packet *packet)
1427 struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
1428 struct ib_header *hdr;
1431 hfi1_setup_ib_header(packet);
1434 lnh = ib_get_lnh(hdr);
1435 if (lnh == HFI1_LRH_BTH) {
1436 packet->ohdr = &hdr->u.oth;
1438 } else if (lnh == HFI1_LRH_GRH) {
1441 packet->ohdr = &hdr->u.l.oth;
1442 packet->grh = &hdr->u.l.grh;
1443 if (packet->grh->next_hdr != IB_GRH_NEXT_HDR)
1445 vtf = be32_to_cpu(packet->grh->version_tclass_flow);
1446 if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
1452 /* Query commonly used fields from packet header */
1453 packet->payload = packet->ebuf;
1454 packet->opcode = ib_bth_get_opcode(packet->ohdr);
1455 packet->slid = ib_get_slid(hdr);
1456 packet->dlid = ib_get_dlid(hdr);
1457 if (unlikely((packet->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
1458 (packet->dlid != be16_to_cpu(IB_LID_PERMISSIVE))))
1459 packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
1460 be16_to_cpu(IB_MULTICAST_LID_BASE);
1461 packet->sl = ib_get_sl(hdr);
1462 packet->sc = hfi1_9B_get_sc5(hdr, packet->rhf);
1463 packet->pad = ib_bth_get_pad(packet->ohdr);
1464 packet->extra_byte = 0;
1465 packet->fecn = ib_bth_get_fecn(packet->ohdr);
1466 packet->becn = ib_bth_get_becn(packet->ohdr);
1470 ibp->rvp.n_pkt_drops++;
1474 static int hfi1_setup_bypass_packet(struct hfi1_packet *packet)
1477 * Bypass packets have a different header/payload split
1478 * compared to an IB packet.
1479 * Current split is set such that 16 bytes of the actual
1480 * header is in the header buffer and the remining is in
1481 * the eager buffer. We chose 16 since hfi1 driver only
1482 * supports 16B bypass packets and we will be able to
1483 * receive the entire LRH with such a split.
1486 struct hfi1_ctxtdata *rcd = packet->rcd;
1487 struct hfi1_pportdata *ppd = rcd->ppd;
1488 struct hfi1_ibport *ibp = &ppd->ibport_data;
1492 packet->hdr = (struct hfi1_16b_header *)
1493 hfi1_get_16B_header(packet->rcd->dd,
1495 packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
1497 l4 = hfi1_16B_get_l4(packet->hdr);
1498 if (l4 == OPA_16B_L4_IB_LOCAL) {
1500 packet->ohdr = packet->ebuf;
1502 } else if (l4 == OPA_16B_L4_IB_GLOBAL) {
1505 grh_len = sizeof(struct ib_grh);
1506 packet->ohdr = packet->ebuf + grh_len;
1507 packet->grh = packet->ebuf;
1508 if (packet->grh->next_hdr != IB_GRH_NEXT_HDR)
1510 vtf = be32_to_cpu(packet->grh->version_tclass_flow);
1511 if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
1517 /* Query commonly used fields from packet header */
1518 packet->opcode = ib_bth_get_opcode(packet->ohdr);
1519 packet->hlen = hdr_len_by_opcode[packet->opcode] + 8 + grh_len;
1520 packet->payload = packet->ebuf + packet->hlen - (4 * sizeof(u32));
1521 packet->slid = hfi1_16B_get_slid(packet->hdr);
1522 packet->dlid = hfi1_16B_get_dlid(packet->hdr);
1523 if (unlikely(hfi1_is_16B_mcast(packet->dlid)))
1524 packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
1525 opa_get_lid(opa_get_mcast_base(OPA_MCAST_NR),
1527 packet->sc = hfi1_16B_get_sc(packet->hdr);
1528 packet->sl = ibp->sc_to_sl[packet->sc];
1529 packet->pad = hfi1_16B_bth_get_pad(packet->ohdr);
1530 packet->extra_byte = SIZE_OF_LT;
1531 packet->fecn = hfi1_16B_get_fecn(packet->hdr);
1532 packet->becn = hfi1_16B_get_becn(packet->hdr);
1534 if (hfi1_bypass_ingress_pkt_check(packet))
1539 hfi1_cdbg(PKT, "%s: packet dropped\n", __func__);
1540 ibp->rvp.n_pkt_drops++;
1544 void handle_eflags(struct hfi1_packet *packet)
1546 struct hfi1_ctxtdata *rcd = packet->rcd;
1547 u32 rte = rhf_rcv_type_err(packet->rhf);
1549 rcv_hdrerr(rcd, rcd->ppd, packet);
1550 if (rhf_err_flags(packet->rhf))
1552 "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n",
1553 rcd->ctxt, packet->rhf,
1554 packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "",
1555 packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "",
1556 packet->rhf & RHF_DC_ERR ? "dc " : "",
1557 packet->rhf & RHF_TID_ERR ? "tid " : "",
1558 packet->rhf & RHF_LEN_ERR ? "len " : "",
1559 packet->rhf & RHF_ECC_ERR ? "ecc " : "",
1560 packet->rhf & RHF_VCRC_ERR ? "vcrc " : "",
1561 packet->rhf & RHF_ICRC_ERR ? "icrc " : "",
1566 * The following functions are called by the interrupt handler. They are type
1567 * specific handlers for each packet type.
1569 int process_receive_ib(struct hfi1_packet *packet)
1571 if (unlikely(hfi1_dbg_fault_packet(packet)))
1572 return RHF_RCV_CONTINUE;
1574 if (hfi1_setup_9B_packet(packet))
1575 return RHF_RCV_CONTINUE;
1577 trace_hfi1_rcvhdr(packet->rcd->ppd->dd,
1579 rhf_err_flags(packet->rhf),
1584 rhf_egr_index(packet->rhf));
1587 (hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) &&
1588 (packet->rhf & RHF_DC_ERR))))
1589 return RHF_RCV_CONTINUE;
1591 if (unlikely(rhf_err_flags(packet->rhf))) {
1592 handle_eflags(packet);
1593 return RHF_RCV_CONTINUE;
1596 hfi1_ib_rcv(packet);
1597 return RHF_RCV_CONTINUE;
1600 static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet)
1602 /* Packet received in VNIC context via RSM */
1603 if (packet->rcd->is_vnic)
1606 if ((hfi1_16B_get_l2(packet->ebuf) == OPA_16B_L2_TYPE) &&
1607 (hfi1_16B_get_l4(packet->ebuf) == OPA_16B_L4_ETHR))
1613 int process_receive_bypass(struct hfi1_packet *packet)
1615 struct hfi1_devdata *dd = packet->rcd->dd;
1617 if (hfi1_is_vnic_packet(packet)) {
1618 hfi1_vnic_bypass_rcv(packet);
1619 return RHF_RCV_CONTINUE;
1622 if (hfi1_setup_bypass_packet(packet))
1623 return RHF_RCV_CONTINUE;
1625 if (unlikely(rhf_err_flags(packet->rhf))) {
1626 handle_eflags(packet);
1627 return RHF_RCV_CONTINUE;
1630 if (hfi1_16B_get_l2(packet->hdr) == 0x2) {
1631 hfi1_16B_rcv(packet);
1634 "Bypass packets other than 16B are not supported in normal operation. Dropping\n");
1635 incr_cntr64(&dd->sw_rcv_bypass_packet_errors);
1636 if (!(dd->err_info_rcvport.status_and_code &
1637 OPA_EI_STATUS_SMASK)) {
1638 u64 *flits = packet->ebuf;
1640 if (flits && !(packet->rhf & RHF_LEN_ERR)) {
1641 dd->err_info_rcvport.packet_flit1 = flits[0];
1642 dd->err_info_rcvport.packet_flit2 =
1643 packet->tlen > sizeof(flits[0]) ?
1646 dd->err_info_rcvport.status_and_code |=
1647 (OPA_EI_STATUS_SMASK | BAD_L2_ERR);
1650 return RHF_RCV_CONTINUE;
1653 int process_receive_error(struct hfi1_packet *packet)
1655 /* KHdrHCRCErr -- KDETH packet with a bad HCRC */
1657 hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) &&
1658 rhf_rcv_type_err(packet->rhf) == 3))
1659 return RHF_RCV_CONTINUE;
1661 hfi1_setup_ib_header(packet);
1662 handle_eflags(packet);
1664 if (unlikely(rhf_err_flags(packet->rhf)))
1665 dd_dev_err(packet->rcd->dd,
1666 "Unhandled error packet received. Dropping.\n");
1668 return RHF_RCV_CONTINUE;
1671 int kdeth_process_expected(struct hfi1_packet *packet)
1673 if (unlikely(hfi1_dbg_fault_packet(packet)))
1674 return RHF_RCV_CONTINUE;
1676 hfi1_setup_ib_header(packet);
1677 if (unlikely(rhf_err_flags(packet->rhf)))
1678 handle_eflags(packet);
1680 dd_dev_err(packet->rcd->dd,
1681 "Unhandled expected packet received. Dropping.\n");
1682 return RHF_RCV_CONTINUE;
1685 int kdeth_process_eager(struct hfi1_packet *packet)
1687 hfi1_setup_ib_header(packet);
1688 if (unlikely(rhf_err_flags(packet->rhf)))
1689 handle_eflags(packet);
1690 if (unlikely(hfi1_dbg_fault_packet(packet)))
1691 return RHF_RCV_CONTINUE;
1693 dd_dev_err(packet->rcd->dd,
1694 "Unhandled eager packet received. Dropping.\n");
1695 return RHF_RCV_CONTINUE;
1698 int process_receive_invalid(struct hfi1_packet *packet)
1700 dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n",
1701 rhf_rcv_type(packet->rhf));
1702 return RHF_RCV_CONTINUE;
1705 void seqfile_dump_rcd(struct seq_file *s, struct hfi1_ctxtdata *rcd)
1707 struct hfi1_packet packet;
1708 struct ps_mdata mdata;
1710 seq_printf(s, "Rcd %u: RcvHdr cnt %u entsize %u %s head %llu tail %llu\n",
1711 rcd->ctxt, rcd->rcvhdrq_cnt, rcd->rcvhdrqentsize,
1712 HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL) ?
1713 "dma_rtail" : "nodma_rtail",
1714 read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD) &
1715 RCV_HDR_HEAD_HEAD_MASK,
1716 read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL));
1718 init_packet(rcd, &packet);
1719 init_ps_mdata(&mdata, &packet);
1722 struct hfi1_devdata *dd = rcd->dd;
1723 __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +
1725 struct ib_header *hdr;
1726 u64 rhf = rhf_to_cpu(rhf_addr);
1727 u32 etype = rhf_rcv_type(rhf), qpn;
1732 if (ps_done(&mdata, rhf, rcd))
1735 if (ps_skip(&mdata, rhf, rcd))
1738 if (etype > RHF_RCV_TYPE_IB)
1741 packet.hdr = hfi1_get_msgheader(dd, rhf_addr);
1744 lnh = be16_to_cpu(hdr->lrh[0]) & 3;
1746 if (lnh == HFI1_LRH_BTH)
1747 packet.ohdr = &hdr->u.oth;
1748 else if (lnh == HFI1_LRH_GRH)
1749 packet.ohdr = &hdr->u.l.oth;
1751 goto next; /* just in case */
1753 opcode = (be32_to_cpu(packet.ohdr->bth[0]) >> 24);
1754 qpn = be32_to_cpu(packet.ohdr->bth[1]) & RVT_QPN_MASK;
1755 psn = mask_psn(be32_to_cpu(packet.ohdr->bth[2]));
1757 seq_printf(s, "\tEnt %u: opcode 0x%x, qpn 0x%x, psn 0x%x\n",
1758 mdata.ps_head, opcode, qpn, psn);
1760 update_ps_mdata(&mdata, rcd);