ipath_verbs.c 31.2 KB
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/*
 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <rdma/ib_mad.h>
#include <rdma/ib_user_verbs.h>
#include <linux/utsname.h>

#include "ipath_kernel.h"
#include "ipath_verbs.h"
#include "ips_common.h"

/* Not static, because we don't want the compiler removing it */
const char ipath_verbs_version[] = "ipath_verbs " IPATH_IDSTR;

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static unsigned int ib_ipath_qp_table_size = 251;
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module_param_named(qp_table_size, ib_ipath_qp_table_size, uint, S_IRUGO);
MODULE_PARM_DESC(qp_table_size, "QP table size");

unsigned int ib_ipath_lkey_table_size = 12;
module_param_named(lkey_table_size, ib_ipath_lkey_table_size, uint,
		   S_IRUGO);
MODULE_PARM_DESC(lkey_table_size,
		 "LKEY table size in bits (2^n, 1 <= n <= 23)");

unsigned int ib_ipath_debug;	/* debug mask */
module_param_named(debug, ib_ipath_debug, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(debug, "Verbs debug mask");

MODULE_LICENSE("GPL");
MODULE_AUTHOR("PathScale <support@pathscale.com>");
MODULE_DESCRIPTION("Pathscale InfiniPath driver");

const int ib_ipath_state_ops[IB_QPS_ERR + 1] = {
	[IB_QPS_RESET] = 0,
	[IB_QPS_INIT] = IPATH_POST_RECV_OK,
	[IB_QPS_RTR] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
	[IB_QPS_RTS] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
	    IPATH_POST_SEND_OK | IPATH_PROCESS_SEND_OK,
	[IB_QPS_SQD] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
	    IPATH_POST_SEND_OK,
	[IB_QPS_SQE] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
	[IB_QPS_ERR] = 0,
};

/*
 * Translate ib_wr_opcode into ib_wc_opcode.
 */
const enum ib_wc_opcode ib_ipath_wc_opcode[] = {
	[IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
	[IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
	[IB_WR_SEND] = IB_WC_SEND,
	[IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
	[IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
	[IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
	[IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD
};

/*
 * System image GUID.
 */
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static __be64 sys_image_guid;
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/**
 * ipath_copy_sge - copy data to SGE memory
 * @ss: the SGE state
 * @data: the data to copy
 * @length: the length of the data
 */
void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length)
{
	struct ipath_sge *sge = &ss->sge;

	while (length) {
		u32 len = sge->length;

		BUG_ON(len == 0);
		if (len > length)
			len = length;
		memcpy(sge->vaddr, data, len);
		sge->vaddr += len;
		sge->length -= len;
		sge->sge_length -= len;
		if (sge->sge_length == 0) {
			if (--ss->num_sge)
				*sge = *ss->sg_list++;
		} else if (sge->length == 0 && sge->mr != NULL) {
			if (++sge->n >= IPATH_SEGSZ) {
				if (++sge->m >= sge->mr->mapsz)
					break;
				sge->n = 0;
			}
			sge->vaddr =
				sge->mr->map[sge->m]->segs[sge->n].vaddr;
			sge->length =
				sge->mr->map[sge->m]->segs[sge->n].length;
		}
		data += len;
		length -= len;
	}
}

/**
 * ipath_skip_sge - skip over SGE memory - XXX almost dup of prev func
 * @ss: the SGE state
 * @length: the number of bytes to skip
 */
void ipath_skip_sge(struct ipath_sge_state *ss, u32 length)
{
	struct ipath_sge *sge = &ss->sge;

	while (length > sge->sge_length) {
		length -= sge->sge_length;
		ss->sge = *ss->sg_list++;
	}
	while (length) {
		u32 len = sge->length;

		BUG_ON(len == 0);
		if (len > length)
			len = length;
		sge->vaddr += len;
		sge->length -= len;
		sge->sge_length -= len;
		if (sge->sge_length == 0) {
			if (--ss->num_sge)
				*sge = *ss->sg_list++;
		} else if (sge->length == 0 && sge->mr != NULL) {
			if (++sge->n >= IPATH_SEGSZ) {
				if (++sge->m >= sge->mr->mapsz)
					break;
				sge->n = 0;
			}
			sge->vaddr =
				sge->mr->map[sge->m]->segs[sge->n].vaddr;
			sge->length =
				sge->mr->map[sge->m]->segs[sge->n].length;
		}
		length -= len;
	}
}

/**
 * ipath_post_send - post a send on a QP
 * @ibqp: the QP to post the send on
 * @wr: the list of work requests to post
 * @bad_wr: the first bad WR is put here
 *
 * This may be called from interrupt context.
 */
static int ipath_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
			   struct ib_send_wr **bad_wr)
{
	struct ipath_qp *qp = to_iqp(ibqp);
	int err = 0;

	/* Check that state is OK to post send. */
	if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK)) {
		*bad_wr = wr;
		err = -EINVAL;
		goto bail;
	}

	for (; wr; wr = wr->next) {
		switch (qp->ibqp.qp_type) {
		case IB_QPT_UC:
		case IB_QPT_RC:
			err = ipath_post_rc_send(qp, wr);
			break;

		case IB_QPT_SMI:
		case IB_QPT_GSI:
		case IB_QPT_UD:
			err = ipath_post_ud_send(qp, wr);
			break;

		default:
			err = -EINVAL;
		}
		if (err) {
			*bad_wr = wr;
			break;
		}
	}

bail:
	return err;
}

/**
 * ipath_post_receive - post a receive on a QP
 * @ibqp: the QP to post the receive on
 * @wr: the WR to post
 * @bad_wr: the first bad WR is put here
 *
 * This may be called from interrupt context.
 */
static int ipath_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
			      struct ib_recv_wr **bad_wr)
{
	struct ipath_qp *qp = to_iqp(ibqp);
	unsigned long flags;
	int ret;

	/* Check that state is OK to post receive. */
	if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_RECV_OK)) {
		*bad_wr = wr;
		ret = -EINVAL;
		goto bail;
	}

	for (; wr; wr = wr->next) {
		struct ipath_rwqe *wqe;
		u32 next;
		int i, j;

		if (wr->num_sge > qp->r_rq.max_sge) {
			*bad_wr = wr;
			ret = -ENOMEM;
			goto bail;
		}

		spin_lock_irqsave(&qp->r_rq.lock, flags);
		next = qp->r_rq.head + 1;
		if (next >= qp->r_rq.size)
			next = 0;
		if (next == qp->r_rq.tail) {
			spin_unlock_irqrestore(&qp->r_rq.lock, flags);
			*bad_wr = wr;
			ret = -ENOMEM;
			goto bail;
		}

		wqe = get_rwqe_ptr(&qp->r_rq, qp->r_rq.head);
		wqe->wr_id = wr->wr_id;
		wqe->sg_list[0].mr = NULL;
		wqe->sg_list[0].vaddr = NULL;
		wqe->sg_list[0].length = 0;
		wqe->sg_list[0].sge_length = 0;
		wqe->length = 0;
		for (i = 0, j = 0; i < wr->num_sge; i++) {
			/* Check LKEY */
			if (to_ipd(qp->ibqp.pd)->user &&
			    wr->sg_list[i].lkey == 0) {
				spin_unlock_irqrestore(&qp->r_rq.lock,
						       flags);
				*bad_wr = wr;
				ret = -EINVAL;
				goto bail;
			}
			if (wr->sg_list[i].length == 0)
				continue;
			if (!ipath_lkey_ok(
				    &to_idev(qp->ibqp.device)->lk_table,
				    &wqe->sg_list[j], &wr->sg_list[i],
				    IB_ACCESS_LOCAL_WRITE)) {
				spin_unlock_irqrestore(&qp->r_rq.lock,
						       flags);
				*bad_wr = wr;
				ret = -EINVAL;
				goto bail;
			}
			wqe->length += wr->sg_list[i].length;
			j++;
		}
		wqe->num_sge = j;
		qp->r_rq.head = next;
		spin_unlock_irqrestore(&qp->r_rq.lock, flags);
	}
	ret = 0;

bail:
	return ret;
}

/**
 * ipath_qp_rcv - processing an incoming packet on a QP
 * @dev: the device the packet came on
 * @hdr: the packet header
 * @has_grh: true if the packet has a GRH
 * @data: the packet data
 * @tlen: the packet length
 * @qp: the QP the packet came on
 *
 * This is called from ipath_ib_rcv() to process an incoming packet
 * for the given QP.
 * Called at interrupt level.
 */
static void ipath_qp_rcv(struct ipath_ibdev *dev,
			 struct ipath_ib_header *hdr, int has_grh,
			 void *data, u32 tlen, struct ipath_qp *qp)
{
	/* Check for valid receive state. */
	if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_RECV_OK)) {
		dev->n_pkt_drops++;
		return;
	}

	switch (qp->ibqp.qp_type) {
	case IB_QPT_SMI:
	case IB_QPT_GSI:
	case IB_QPT_UD:
		ipath_ud_rcv(dev, hdr, has_grh, data, tlen, qp);
		break;

	case IB_QPT_RC:
		ipath_rc_rcv(dev, hdr, has_grh, data, tlen, qp);
		break;

	case IB_QPT_UC:
		ipath_uc_rcv(dev, hdr, has_grh, data, tlen, qp);
		break;

	default:
		break;
	}
}

/**
 * ipath_ib_rcv - process and incoming packet
 * @arg: the device pointer
 * @rhdr: the header of the packet
 * @data: the packet data
 * @tlen: the packet length
 *
 * This is called from ipath_kreceive() to process an incoming packet at
 * interrupt level. Tlen is the length of the header + data + CRC in bytes.
 */
static void ipath_ib_rcv(void *arg, void *rhdr, void *data, u32 tlen)
{
	struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
	struct ipath_ib_header *hdr = rhdr;
	struct ipath_other_headers *ohdr;
	struct ipath_qp *qp;
	u32 qp_num;
	int lnh;
	u8 opcode;
	u16 lid;

	if (unlikely(dev == NULL))
		goto bail;

	if (unlikely(tlen < 24)) {	/* LRH+BTH+CRC */
		dev->rcv_errors++;
		goto bail;
	}

	/* Check for a valid destination LID (see ch. 7.11.1). */
	lid = be16_to_cpu(hdr->lrh[1]);
	if (lid < IPS_MULTICAST_LID_BASE) {
		lid &= ~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
		if (unlikely(lid != ipath_layer_get_lid(dev->dd))) {
			dev->rcv_errors++;
			goto bail;
		}
	}

	/* Check for GRH */
	lnh = be16_to_cpu(hdr->lrh[0]) & 3;
	if (lnh == IPS_LRH_BTH)
		ohdr = &hdr->u.oth;
	else if (lnh == IPS_LRH_GRH)
		ohdr = &hdr->u.l.oth;
	else {
		dev->rcv_errors++;
		goto bail;
	}

	opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
	dev->opstats[opcode].n_bytes += tlen;
	dev->opstats[opcode].n_packets++;

	/* Get the destination QP number. */
	qp_num = be32_to_cpu(ohdr->bth[1]) & IPS_QPN_MASK;
	if (qp_num == IPS_MULTICAST_QPN) {
		struct ipath_mcast *mcast;
		struct ipath_mcast_qp *p;

		mcast = ipath_mcast_find(&hdr->u.l.grh.dgid);
		if (mcast == NULL) {
			dev->n_pkt_drops++;
			goto bail;
		}
		dev->n_multicast_rcv++;
		list_for_each_entry_rcu(p, &mcast->qp_list, list)
			ipath_qp_rcv(dev, hdr, lnh == IPS_LRH_GRH, data,
				     tlen, p->qp);
		/*
		 * Notify ipath_multicast_detach() if it is waiting for us
		 * to finish.
		 */
		if (atomic_dec_return(&mcast->refcount) <= 1)
			wake_up(&mcast->wait);
	} else {
		qp = ipath_lookup_qpn(&dev->qp_table, qp_num);
		if (qp) {
			dev->n_unicast_rcv++;
			ipath_qp_rcv(dev, hdr, lnh == IPS_LRH_GRH, data,
				     tlen, qp);
			/*
			 * Notify ipath_destroy_qp() if it is waiting
			 * for us to finish.
			 */
			if (atomic_dec_and_test(&qp->refcount))
				wake_up(&qp->wait);
		} else
			dev->n_pkt_drops++;
	}

bail:;
}

/**
 * ipath_ib_timer - verbs timer
 * @arg: the device pointer
 *
 * This is called from ipath_do_rcv_timer() at interrupt level to check for
 * QPs which need retransmits and to collect performance numbers.
 */
static void ipath_ib_timer(void *arg)
{
	struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
	struct ipath_qp *resend = NULL;
	struct list_head *last;
	struct ipath_qp *qp;
	unsigned long flags;

	if (dev == NULL)
		return;

	spin_lock_irqsave(&dev->pending_lock, flags);
	/* Start filling the next pending queue. */
	if (++dev->pending_index >= ARRAY_SIZE(dev->pending))
		dev->pending_index = 0;
	/* Save any requests still in the new queue, they have timed out. */
	last = &dev->pending[dev->pending_index];
	while (!list_empty(last)) {
		qp = list_entry(last->next, struct ipath_qp, timerwait);
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		list_del(&qp->timerwait);
		qp->timer_next = resend;
		resend = qp;
		atomic_inc(&qp->refcount);
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	}
	last = &dev->rnrwait;
	if (!list_empty(last)) {
		qp = list_entry(last->next, struct ipath_qp, timerwait);
		if (--qp->s_rnr_timeout == 0) {
			do {
				list_del(&qp->timerwait);
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				tasklet_hi_schedule(&qp->s_task);
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				if (list_empty(last))
					break;
				qp = list_entry(last->next, struct ipath_qp,
						timerwait);
			} while (qp->s_rnr_timeout == 0);
		}
	}
	/*
	 * We should only be in the started state if pma_sample_start != 0
	 */
	if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_STARTED &&
	    --dev->pma_sample_start == 0) {
		dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_RUNNING;
		ipath_layer_snapshot_counters(dev->dd, &dev->ipath_sword,
					      &dev->ipath_rword,
					      &dev->ipath_spkts,
					      &dev->ipath_rpkts,
					      &dev->ipath_xmit_wait);
	}
	if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_RUNNING) {
		if (dev->pma_sample_interval == 0) {
			u64 ta, tb, tc, td, te;

			dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_DONE;
			ipath_layer_snapshot_counters(dev->dd, &ta, &tb,
						      &tc, &td, &te);

			dev->ipath_sword = ta - dev->ipath_sword;
			dev->ipath_rword = tb - dev->ipath_rword;
			dev->ipath_spkts = tc - dev->ipath_spkts;
			dev->ipath_rpkts = td - dev->ipath_rpkts;
			dev->ipath_xmit_wait = te - dev->ipath_xmit_wait;
		}
		else
			dev->pma_sample_interval--;
	}
	spin_unlock_irqrestore(&dev->pending_lock, flags);

	/* XXX What if timer fires again while this is running? */
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	for (qp = resend; qp != NULL; qp = qp->timer_next) {
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		struct ib_wc wc;

		spin_lock_irqsave(&qp->s_lock, flags);
		if (qp->s_last != qp->s_tail && qp->state == IB_QPS_RTS) {
			dev->n_timeouts++;
			ipath_restart_rc(qp, qp->s_last_psn + 1, &wc);
		}
		spin_unlock_irqrestore(&qp->s_lock, flags);

		/* Notify ipath_destroy_qp() if it is waiting. */
		if (atomic_dec_and_test(&qp->refcount))
			wake_up(&qp->wait);
	}
}

/**
 * ipath_ib_piobufavail - callback when a PIO buffer is available
 * @arg: the device pointer
 *
 * This is called from ipath_intr() at interrupt level when a PIO buffer is
 * available after ipath_verbs_send() returned an error that no buffers were
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 * available.  Return 1 if we consumed all the PIO buffers and we still have
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 * QPs waiting for buffers (for now, just do a tasklet_hi_schedule and
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 * return zero).
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 */
static int ipath_ib_piobufavail(void *arg)
{
	struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
	struct ipath_qp *qp;
	unsigned long flags;

	if (dev == NULL)
		goto bail;

	spin_lock_irqsave(&dev->pending_lock, flags);
	while (!list_empty(&dev->piowait)) {
		qp = list_entry(dev->piowait.next, struct ipath_qp,
				piowait);
		list_del(&qp->piowait);
		tasklet_hi_schedule(&qp->s_task);
	}
	spin_unlock_irqrestore(&dev->pending_lock, flags);

bail:
563
	return 0;
564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093
}

static int ipath_query_device(struct ib_device *ibdev,
			      struct ib_device_attr *props)
{
	struct ipath_ibdev *dev = to_idev(ibdev);
	u32 vendor, boardrev, majrev, minrev;

	memset(props, 0, sizeof(*props));

	props->device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
		IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
		IB_DEVICE_SYS_IMAGE_GUID;
	ipath_layer_query_device(dev->dd, &vendor, &boardrev,
				 &majrev, &minrev);
	props->vendor_id = vendor;
	props->vendor_part_id = boardrev;
	props->hw_ver = boardrev << 16 | majrev << 8 | minrev;

	props->sys_image_guid = dev->sys_image_guid;

	props->max_mr_size = ~0ull;
	props->max_qp = 0xffff;
	props->max_qp_wr = 0xffff;
	props->max_sge = 255;
	props->max_cq = 0xffff;
	props->max_cqe = 0xffff;
	props->max_mr = 0xffff;
	props->max_pd = 0xffff;
	props->max_qp_rd_atom = 1;
	props->max_qp_init_rd_atom = 1;
	/* props->max_res_rd_atom */
	props->max_srq = 0xffff;
	props->max_srq_wr = 0xffff;
	props->max_srq_sge = 255;
	/* props->local_ca_ack_delay */
	props->atomic_cap = IB_ATOMIC_HCA;
	props->max_pkeys = ipath_layer_get_npkeys(dev->dd);
	props->max_mcast_grp = 0xffff;
	props->max_mcast_qp_attach = 0xffff;
	props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
		props->max_mcast_grp;

	return 0;
}

const u8 ipath_cvt_physportstate[16] = {
	[INFINIPATH_IBCS_LT_STATE_DISABLED] = 3,
	[INFINIPATH_IBCS_LT_STATE_LINKUP] = 5,
	[INFINIPATH_IBCS_LT_STATE_POLLACTIVE] = 2,
	[INFINIPATH_IBCS_LT_STATE_POLLQUIET] = 2,
	[INFINIPATH_IBCS_LT_STATE_SLEEPDELAY] = 1,
	[INFINIPATH_IBCS_LT_STATE_SLEEPQUIET] = 1,
	[INFINIPATH_IBCS_LT_STATE_CFGDEBOUNCE] = 4,
	[INFINIPATH_IBCS_LT_STATE_CFGRCVFCFG] = 4,
	[INFINIPATH_IBCS_LT_STATE_CFGWAITRMT] = 4,
	[INFINIPATH_IBCS_LT_STATE_CFGIDLE] = 4,
	[INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN] = 6,
	[INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT] = 6,
	[INFINIPATH_IBCS_LT_STATE_RECOVERIDLE] = 6,
};

static int ipath_query_port(struct ib_device *ibdev,
			    u8 port, struct ib_port_attr *props)
{
	struct ipath_ibdev *dev = to_idev(ibdev);
	enum ib_mtu mtu;
	u16 lid = ipath_layer_get_lid(dev->dd);
	u64 ibcstat;

	memset(props, 0, sizeof(*props));
	props->lid = lid ? lid : __constant_be16_to_cpu(IB_LID_PERMISSIVE);
	props->lmc = dev->mkeyprot_resv_lmc & 7;
	props->sm_lid = dev->sm_lid;
	props->sm_sl = dev->sm_sl;
	ibcstat = ipath_layer_get_lastibcstat(dev->dd);
	props->state = ((ibcstat >> 4) & 0x3) + 1;
	/* See phys_state_show() */
	props->phys_state = ipath_cvt_physportstate[
		ipath_layer_get_lastibcstat(dev->dd) & 0xf];
	props->port_cap_flags = dev->port_cap_flags;
	props->gid_tbl_len = 1;
	props->max_msg_sz = 4096;
	props->pkey_tbl_len = ipath_layer_get_npkeys(dev->dd);
	props->bad_pkey_cntr = ipath_layer_get_cr_errpkey(dev->dd) -
		dev->n_pkey_violations;
	props->qkey_viol_cntr = dev->qkey_violations;
	props->active_width = IB_WIDTH_4X;
	/* See rate_show() */
	props->active_speed = 1;	/* Regular 10Mbs speed. */
	props->max_vl_num = 1;		/* VLCap = VL0 */
	props->init_type_reply = 0;

	props->max_mtu = IB_MTU_4096;
	switch (ipath_layer_get_ibmtu(dev->dd)) {
	case 4096:
		mtu = IB_MTU_4096;
		break;
	case 2048:
		mtu = IB_MTU_2048;
		break;
	case 1024:
		mtu = IB_MTU_1024;
		break;
	case 512:
		mtu = IB_MTU_512;
		break;
	case 256:
		mtu = IB_MTU_256;
		break;
	default:
		mtu = IB_MTU_2048;
	}
	props->active_mtu = mtu;
	props->subnet_timeout = dev->subnet_timeout;

	return 0;
}

static int ipath_modify_device(struct ib_device *device,
			       int device_modify_mask,
			       struct ib_device_modify *device_modify)
{
	int ret;

	if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
				   IB_DEVICE_MODIFY_NODE_DESC)) {
		ret = -EOPNOTSUPP;
		goto bail;
	}

	if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC)
		memcpy(device->node_desc, device_modify->node_desc, 64);

	if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
		to_idev(device)->sys_image_guid =
			cpu_to_be64(device_modify->sys_image_guid);

	ret = 0;

bail:
	return ret;
}

static int ipath_modify_port(struct ib_device *ibdev,
			     u8 port, int port_modify_mask,
			     struct ib_port_modify *props)
{
	struct ipath_ibdev *dev = to_idev(ibdev);

	dev->port_cap_flags |= props->set_port_cap_mask;
	dev->port_cap_flags &= ~props->clr_port_cap_mask;
	if (port_modify_mask & IB_PORT_SHUTDOWN)
		ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKDOWN);
	if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
		dev->qkey_violations = 0;
	return 0;
}

static int ipath_query_gid(struct ib_device *ibdev, u8 port,
			   int index, union ib_gid *gid)
{
	struct ipath_ibdev *dev = to_idev(ibdev);
	int ret;

	if (index >= 1) {
		ret = -EINVAL;
		goto bail;
	}
	gid->global.subnet_prefix = dev->gid_prefix;
	gid->global.interface_id = ipath_layer_get_guid(dev->dd);

	ret = 0;

bail:
	return ret;
}

static struct ib_pd *ipath_alloc_pd(struct ib_device *ibdev,
				    struct ib_ucontext *context,
				    struct ib_udata *udata)
{
	struct ipath_pd *pd;
	struct ib_pd *ret;

	pd = kmalloc(sizeof *pd, GFP_KERNEL);
	if (!pd) {
		ret = ERR_PTR(-ENOMEM);
		goto bail;
	}

	/* ib_alloc_pd() will initialize pd->ibpd. */
	pd->user = udata != NULL;

	ret = &pd->ibpd;

bail:
	return ret;
}

static int ipath_dealloc_pd(struct ib_pd *ibpd)
{
	struct ipath_pd *pd = to_ipd(ibpd);

	kfree(pd);

	return 0;
}

/**
 * ipath_create_ah - create an address handle
 * @pd: the protection domain
 * @ah_attr: the attributes of the AH
 *
 * This may be called from interrupt context.
 */
static struct ib_ah *ipath_create_ah(struct ib_pd *pd,
				     struct ib_ah_attr *ah_attr)
{
	struct ipath_ah *ah;
	struct ib_ah *ret;

	/* A multicast address requires a GRH (see ch. 8.4.1). */
	if (ah_attr->dlid >= IPS_MULTICAST_LID_BASE &&
	    ah_attr->dlid != IPS_PERMISSIVE_LID &&
	    !(ah_attr->ah_flags & IB_AH_GRH)) {
		ret = ERR_PTR(-EINVAL);
		goto bail;
	}

	ah = kmalloc(sizeof *ah, GFP_ATOMIC);
	if (!ah) {
		ret = ERR_PTR(-ENOMEM);
		goto bail;
	}

	/* ib_create_ah() will initialize ah->ibah. */
	ah->attr = *ah_attr;

	ret = &ah->ibah;

bail:
	return ret;
}

/**
 * ipath_destroy_ah - destroy an address handle
 * @ibah: the AH to destroy
 *
 * This may be called from interrupt context.
 */
static int ipath_destroy_ah(struct ib_ah *ibah)
{
	struct ipath_ah *ah = to_iah(ibah);

	kfree(ah);

	return 0;
}

static int ipath_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
{
	struct ipath_ah *ah = to_iah(ibah);

	*ah_attr = ah->attr;

	return 0;
}

static int ipath_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
			    u16 *pkey)
{
	struct ipath_ibdev *dev = to_idev(ibdev);
	int ret;

	if (index >= ipath_layer_get_npkeys(dev->dd)) {
		ret = -EINVAL;
		goto bail;
	}

	*pkey = ipath_layer_get_pkey(dev->dd, index);
	ret = 0;

bail:
	return ret;
}


/**
 * ipath_alloc_ucontext - allocate a ucontest
 * @ibdev: the infiniband device
 * @udata: not used by the InfiniPath driver
 */

static struct ib_ucontext *ipath_alloc_ucontext(struct ib_device *ibdev,
						struct ib_udata *udata)
{
	struct ipath_ucontext *context;
	struct ib_ucontext *ret;

	context = kmalloc(sizeof *context, GFP_KERNEL);
	if (!context) {
		ret = ERR_PTR(-ENOMEM);
		goto bail;
	}

	ret = &context->ibucontext;

bail:
	return ret;
}

static int ipath_dealloc_ucontext(struct ib_ucontext *context)
{
	kfree(to_iucontext(context));
	return 0;
}

static int ipath_verbs_register_sysfs(struct ib_device *dev);

/**
 * ipath_register_ib_device - register our device with the infiniband core
 * @unit: the device number to register
 * @dd: the device data structure
 * Return the allocated ipath_ibdev pointer or NULL on error.
 */
static void *ipath_register_ib_device(int unit, struct ipath_devdata *dd)
{
	struct ipath_ibdev *idev;
	struct ib_device *dev;
	int ret;

	idev = (struct ipath_ibdev *)ib_alloc_device(sizeof *idev);
	if (idev == NULL)
		goto bail;

	dev = &idev->ibdev;

	/* Only need to initialize non-zero fields. */
	spin_lock_init(&idev->qp_table.lock);
	spin_lock_init(&idev->lk_table.lock);
	idev->sm_lid = __constant_be16_to_cpu(IB_LID_PERMISSIVE);
	/* Set the prefix to the default value (see ch. 4.1.1) */
	idev->gid_prefix = __constant_cpu_to_be64(0xfe80000000000000ULL);

	ret = ipath_init_qp_table(idev, ib_ipath_qp_table_size);
	if (ret)
		goto err_qp;

	/*
	 * The top ib_ipath_lkey_table_size bits are used to index the
	 * table.  The lower 8 bits can be owned by the user (copied from
	 * the LKEY).  The remaining bits act as a generation number or tag.
	 */
	idev->lk_table.max = 1 << ib_ipath_lkey_table_size;
	idev->lk_table.table = kzalloc(idev->lk_table.max *
				       sizeof(*idev->lk_table.table),
				       GFP_KERNEL);
	if (idev->lk_table.table == NULL) {
		ret = -ENOMEM;
		goto err_lk;
	}
	spin_lock_init(&idev->pending_lock);
	INIT_LIST_HEAD(&idev->pending[0]);
	INIT_LIST_HEAD(&idev->pending[1]);
	INIT_LIST_HEAD(&idev->pending[2]);
	INIT_LIST_HEAD(&idev->piowait);
	INIT_LIST_HEAD(&idev->rnrwait);
	idev->pending_index = 0;
	idev->port_cap_flags =
		IB_PORT_SYS_IMAGE_GUID_SUP | IB_PORT_CLIENT_REG_SUP;
	idev->pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
	idev->pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
	idev->pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
	idev->pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
	idev->pma_counter_select[5] = IB_PMA_PORT_XMIT_WAIT;
	idev->link_width_enabled = 3;	/* 1x or 4x */

	/*
	 * The system image GUID is supposed to be the same for all
	 * IB HCAs in a single system but since there can be other
	 * device types in the system, we can't be sure this is unique.
	 */
	if (!sys_image_guid)
		sys_image_guid = ipath_layer_get_guid(dd);
	idev->sys_image_guid = sys_image_guid;
	idev->ib_unit = unit;
	idev->dd = dd;

	strlcpy(dev->name, "ipath%d", IB_DEVICE_NAME_MAX);
	dev->node_guid = ipath_layer_get_guid(dd);
	dev->uverbs_abi_ver = IPATH_UVERBS_ABI_VERSION;
	dev->uverbs_cmd_mask =
		(1ull << IB_USER_VERBS_CMD_GET_CONTEXT)		|
		(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)	|
		(1ull << IB_USER_VERBS_CMD_QUERY_PORT)		|
		(1ull << IB_USER_VERBS_CMD_ALLOC_PD)		|
		(1ull << IB_USER_VERBS_CMD_DEALLOC_PD)		|
		(1ull << IB_USER_VERBS_CMD_CREATE_AH)		|
		(1ull << IB_USER_VERBS_CMD_DESTROY_AH)		|
		(1ull << IB_USER_VERBS_CMD_QUERY_AH)		|
		(1ull << IB_USER_VERBS_CMD_REG_MR)		|
		(1ull << IB_USER_VERBS_CMD_DEREG_MR)		|
		(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
		(1ull << IB_USER_VERBS_CMD_CREATE_CQ)		|
		(1ull << IB_USER_VERBS_CMD_RESIZE_CQ)		|
		(1ull << IB_USER_VERBS_CMD_DESTROY_CQ)		|
		(1ull << IB_USER_VERBS_CMD_POLL_CQ)		|
		(1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)	|
		(1ull << IB_USER_VERBS_CMD_CREATE_QP)		|
		(1ull << IB_USER_VERBS_CMD_QUERY_QP)		|
		(1ull << IB_USER_VERBS_CMD_MODIFY_QP)		|
		(1ull << IB_USER_VERBS_CMD_DESTROY_QP)		|
		(1ull << IB_USER_VERBS_CMD_POST_SEND)		|
		(1ull << IB_USER_VERBS_CMD_POST_RECV)		|
		(1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)	|
		(1ull << IB_USER_VERBS_CMD_DETACH_MCAST)	|
		(1ull << IB_USER_VERBS_CMD_CREATE_SRQ)		|
		(1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)		|
		(1ull << IB_USER_VERBS_CMD_QUERY_SRQ)		|
		(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)		|
		(1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
	dev->node_type = IB_NODE_CA;
	dev->phys_port_cnt = 1;
	dev->dma_device = ipath_layer_get_device(dd);
	dev->class_dev.dev = dev->dma_device;
	dev->query_device = ipath_query_device;
	dev->modify_device = ipath_modify_device;
	dev->query_port = ipath_query_port;
	dev->modify_port = ipath_modify_port;
	dev->query_pkey = ipath_query_pkey;
	dev->query_gid = ipath_query_gid;
	dev->alloc_ucontext = ipath_alloc_ucontext;
	dev->dealloc_ucontext = ipath_dealloc_ucontext;
	dev->alloc_pd = ipath_alloc_pd;
	dev->dealloc_pd = ipath_dealloc_pd;
	dev->create_ah = ipath_create_ah;
	dev->destroy_ah = ipath_destroy_ah;
	dev->query_ah = ipath_query_ah;
	dev->create_srq = ipath_create_srq;
	dev->modify_srq = ipath_modify_srq;
	dev->query_srq = ipath_query_srq;
	dev->destroy_srq = ipath_destroy_srq;
	dev->create_qp = ipath_create_qp;
	dev->modify_qp = ipath_modify_qp;
	dev->query_qp = ipath_query_qp;
	dev->destroy_qp = ipath_destroy_qp;
	dev->post_send = ipath_post_send;
	dev->post_recv = ipath_post_receive;
	dev->post_srq_recv = ipath_post_srq_receive;
	dev->create_cq = ipath_create_cq;
	dev->destroy_cq = ipath_destroy_cq;
	dev->resize_cq = ipath_resize_cq;
	dev->poll_cq = ipath_poll_cq;
	dev->req_notify_cq = ipath_req_notify_cq;
	dev->get_dma_mr = ipath_get_dma_mr;
	dev->reg_phys_mr = ipath_reg_phys_mr;
	dev->reg_user_mr = ipath_reg_user_mr;
	dev->dereg_mr = ipath_dereg_mr;
	dev->alloc_fmr = ipath_alloc_fmr;
	dev->map_phys_fmr = ipath_map_phys_fmr;
	dev->unmap_fmr = ipath_unmap_fmr;
	dev->dealloc_fmr = ipath_dealloc_fmr;
	dev->attach_mcast = ipath_multicast_attach;
	dev->detach_mcast = ipath_multicast_detach;
	dev->process_mad = ipath_process_mad;

	snprintf(dev->node_desc, sizeof(dev->node_desc),
		 IPATH_IDSTR " %s kernel_SMA", system_utsname.nodename);

	ret = ib_register_device(dev);
	if (ret)
		goto err_reg;

	if (ipath_verbs_register_sysfs(dev))
		goto err_class;

	ipath_layer_enable_timer(dd);

	goto bail;

err_class:
	ib_unregister_device(dev);
err_reg:
	kfree(idev->lk_table.table);
err_lk:
	kfree(idev->qp_table.table);
err_qp:
	ib_dealloc_device(dev);
	_VERBS_ERROR("ib_ipath%d cannot register verbs (%d)!\n",
		     unit, -ret);
	idev = NULL;

bail:
	return idev;
}

static void ipath_unregister_ib_device(void *arg)
{
	struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
	struct ib_device *ibdev = &dev->ibdev;

	ipath_layer_disable_timer(dev->dd);

	ib_unregister_device(ibdev);

	if (!list_empty(&dev->pending[0]) ||
	    !list_empty(&dev->pending[1]) ||
	    !list_empty(&dev->pending[2]))
		_VERBS_ERROR("ipath%d pending list not empty!\n",
			     dev->ib_unit);
	if (!list_empty(&dev->piowait))
		_VERBS_ERROR("ipath%d piowait list not empty!\n",
			     dev->ib_unit);
	if (!list_empty(&dev->rnrwait))
		_VERBS_ERROR("ipath%d rnrwait list not empty!\n",
			     dev->ib_unit);
	if (!ipath_mcast_tree_empty())
		_VERBS_ERROR("ipath%d multicast table memory leak!\n",
			     dev->ib_unit);
	/*
	 * Note that ipath_unregister_ib_device() can be called before all
	 * the QPs are destroyed!
	 */
	ipath_free_all_qps(&dev->qp_table);
	kfree(dev->qp_table.table);
	kfree(dev->lk_table.table);
	ib_dealloc_device(ibdev);
}

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Roland Dreier 已提交
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static int __init ipath_verbs_init(void)
1095 1096 1097 1098 1099 1100 1101
{
	return ipath_verbs_register(ipath_register_ib_device,
				    ipath_unregister_ib_device,
				    ipath_ib_piobufavail, ipath_ib_rcv,
				    ipath_ib_timer);
}

R
Roland Dreier 已提交
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static void __exit ipath_verbs_cleanup(void)
1103 1104 1105 1106 1107 1108
{
	ipath_verbs_unregister();
}

static ssize_t show_rev(struct class_device *cdev, char *buf)
{
R
Roland Dreier 已提交
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	struct ipath_ibdev *dev =
		container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
	int vendor, boardrev, majrev, minrev;
1112

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Roland Dreier 已提交
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	ipath_layer_query_device(dev->dd, &vendor, &boardrev,
				 &majrev, &minrev);
	return sprintf(buf, "%d.%d\n", majrev, minrev);
1116 1117 1118 1119
}

static ssize_t show_hca(struct class_device *cdev, char *buf)
{
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Roland Dreier 已提交
1120 1121 1122
	struct ipath_ibdev *dev =
		container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
	int ret;
1123

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	ret = ipath_layer_get_boardname(dev->dd, buf, 128);
	if (ret < 0)
		goto bail;
	strcat(buf, "\n");
	ret = strlen(buf);
1129 1130 1131 1132 1133 1134 1135

bail:
	return ret;
}

static ssize_t show_stats(struct class_device *cdev, char *buf)
{
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	struct ipath_ibdev *dev =
		container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
	int i;
	int len;

	len = sprintf(buf,
		      "RC resends  %d\n"
1143
		      "RC no QACK  %d\n"
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		      "RC ACKs     %d\n"
		      "RC SEQ NAKs %d\n"
		      "RC RDMA seq %d\n"
		      "RC RNR NAKs %d\n"
		      "RC OTH NAKs %d\n"
		      "RC timeouts %d\n"
		      "RC RDMA dup %d\n"
		      "piobuf wait %d\n"
		      "no piobuf   %d\n"
		      "PKT drops   %d\n"
		      "WQE errs    %d\n",
		      dev->n_rc_resends, dev->n_rc_qacks, dev->n_rc_acks,
		      dev->n_seq_naks, dev->n_rdma_seq, dev->n_rnr_naks,
		      dev->n_other_naks, dev->n_timeouts,
		      dev->n_rdma_dup_busy, dev->n_piowait,
		      dev->n_no_piobuf, dev->n_pkt_drops, dev->n_wqe_errs);
	for (i = 0; i < ARRAY_SIZE(dev->opstats); i++) {
1161 1162
		const struct ipath_opcode_stats *si = &dev->opstats[i];

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		if (!si->n_packets && !si->n_bytes)
			continue;
		len += sprintf(buf + len, "%02x %llu/%llu\n", i,
1166
			       (unsigned long long) si->n_packets,
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			       (unsigned long long) si->n_bytes);
	}
	return len;
1170 1171 1172 1173 1174 1175 1176 1177
}

static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
static CLASS_DEVICE_ATTR(stats, S_IRUGO, show_stats, NULL);

static struct class_device_attribute *ipath_class_attributes[] = {
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	&class_device_attr_hw_rev,
	&class_device_attr_hca_type,
	&class_device_attr_board_id,
	&class_device_attr_stats
1182 1183 1184 1185
};

static int ipath_verbs_register_sysfs(struct ib_device *dev)
{
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	int i;
1187 1188
	int ret;

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	for (i = 0; i < ARRAY_SIZE(ipath_class_attributes); ++i)
		if (class_device_create_file(&dev->class_dev,
					     ipath_class_attributes[i])) {
			ret = 1;
1193 1194 1195
			goto bail;
		}

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	ret = 0;
1197 1198 1199 1200 1201 1202 1203

bail:
	return ret;
}

module_init(ipath_verbs_init);
module_exit(ipath_verbs_cleanup);