18c2ecf20Sopenharmony_ci/*
28c2ecf20Sopenharmony_ci * Copyright (c) 2012 - 2018 Intel Corporation.  All rights reserved.
38c2ecf20Sopenharmony_ci * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
48c2ecf20Sopenharmony_ci * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
58c2ecf20Sopenharmony_ci *
68c2ecf20Sopenharmony_ci * This software is available to you under a choice of one of two
78c2ecf20Sopenharmony_ci * licenses.  You may choose to be licensed under the terms of the GNU
88c2ecf20Sopenharmony_ci * General Public License (GPL) Version 2, available from the file
98c2ecf20Sopenharmony_ci * COPYING in the main directory of this source tree, or the
108c2ecf20Sopenharmony_ci * OpenIB.org BSD license below:
118c2ecf20Sopenharmony_ci *
128c2ecf20Sopenharmony_ci *     Redistribution and use in source and binary forms, with or
138c2ecf20Sopenharmony_ci *     without modification, are permitted provided that the following
148c2ecf20Sopenharmony_ci *     conditions are met:
158c2ecf20Sopenharmony_ci *
168c2ecf20Sopenharmony_ci *      - Redistributions of source code must retain the above
178c2ecf20Sopenharmony_ci *        copyright notice, this list of conditions and the following
188c2ecf20Sopenharmony_ci *        disclaimer.
198c2ecf20Sopenharmony_ci *
208c2ecf20Sopenharmony_ci *      - Redistributions in binary form must reproduce the above
218c2ecf20Sopenharmony_ci *        copyright notice, this list of conditions and the following
228c2ecf20Sopenharmony_ci *        disclaimer in the documentation and/or other materials
238c2ecf20Sopenharmony_ci *        provided with the distribution.
248c2ecf20Sopenharmony_ci *
258c2ecf20Sopenharmony_ci * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
268c2ecf20Sopenharmony_ci * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
278c2ecf20Sopenharmony_ci * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
288c2ecf20Sopenharmony_ci * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
298c2ecf20Sopenharmony_ci * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
308c2ecf20Sopenharmony_ci * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
318c2ecf20Sopenharmony_ci * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
328c2ecf20Sopenharmony_ci * SOFTWARE.
338c2ecf20Sopenharmony_ci */
348c2ecf20Sopenharmony_ci
358c2ecf20Sopenharmony_ci#include <rdma/ib_mad.h>
368c2ecf20Sopenharmony_ci#include <rdma/ib_user_verbs.h>
378c2ecf20Sopenharmony_ci#include <linux/io.h>
388c2ecf20Sopenharmony_ci#include <linux/module.h>
398c2ecf20Sopenharmony_ci#include <linux/utsname.h>
408c2ecf20Sopenharmony_ci#include <linux/rculist.h>
418c2ecf20Sopenharmony_ci#include <linux/mm.h>
428c2ecf20Sopenharmony_ci#include <linux/vmalloc.h>
438c2ecf20Sopenharmony_ci#include <rdma/rdma_vt.h>
448c2ecf20Sopenharmony_ci
458c2ecf20Sopenharmony_ci#include "qib.h"
468c2ecf20Sopenharmony_ci#include "qib_common.h"
478c2ecf20Sopenharmony_ci
488c2ecf20Sopenharmony_cistatic unsigned int ib_qib_qp_table_size = 256;
498c2ecf20Sopenharmony_cimodule_param_named(qp_table_size, ib_qib_qp_table_size, uint, S_IRUGO);
508c2ecf20Sopenharmony_ciMODULE_PARM_DESC(qp_table_size, "QP table size");
518c2ecf20Sopenharmony_ci
528c2ecf20Sopenharmony_cistatic unsigned int qib_lkey_table_size = 16;
538c2ecf20Sopenharmony_cimodule_param_named(lkey_table_size, qib_lkey_table_size, uint,
548c2ecf20Sopenharmony_ci		   S_IRUGO);
558c2ecf20Sopenharmony_ciMODULE_PARM_DESC(lkey_table_size,
568c2ecf20Sopenharmony_ci		 "LKEY table size in bits (2^n, 1 <= n <= 23)");
578c2ecf20Sopenharmony_ci
588c2ecf20Sopenharmony_cistatic unsigned int ib_qib_max_pds = 0xFFFF;
598c2ecf20Sopenharmony_cimodule_param_named(max_pds, ib_qib_max_pds, uint, S_IRUGO);
608c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_pds,
618c2ecf20Sopenharmony_ci		 "Maximum number of protection domains to support");
628c2ecf20Sopenharmony_ci
638c2ecf20Sopenharmony_cistatic unsigned int ib_qib_max_ahs = 0xFFFF;
648c2ecf20Sopenharmony_cimodule_param_named(max_ahs, ib_qib_max_ahs, uint, S_IRUGO);
658c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
668c2ecf20Sopenharmony_ci
678c2ecf20Sopenharmony_ciunsigned int ib_qib_max_cqes = 0x2FFFF;
688c2ecf20Sopenharmony_cimodule_param_named(max_cqes, ib_qib_max_cqes, uint, S_IRUGO);
698c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_cqes,
708c2ecf20Sopenharmony_ci		 "Maximum number of completion queue entries to support");
718c2ecf20Sopenharmony_ci
728c2ecf20Sopenharmony_ciunsigned int ib_qib_max_cqs = 0x1FFFF;
738c2ecf20Sopenharmony_cimodule_param_named(max_cqs, ib_qib_max_cqs, uint, S_IRUGO);
748c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
758c2ecf20Sopenharmony_ci
768c2ecf20Sopenharmony_ciunsigned int ib_qib_max_qp_wrs = 0x3FFF;
778c2ecf20Sopenharmony_cimodule_param_named(max_qp_wrs, ib_qib_max_qp_wrs, uint, S_IRUGO);
788c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
798c2ecf20Sopenharmony_ci
808c2ecf20Sopenharmony_ciunsigned int ib_qib_max_qps = 16384;
818c2ecf20Sopenharmony_cimodule_param_named(max_qps, ib_qib_max_qps, uint, S_IRUGO);
828c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");
838c2ecf20Sopenharmony_ci
848c2ecf20Sopenharmony_ciunsigned int ib_qib_max_sges = 0x60;
858c2ecf20Sopenharmony_cimodule_param_named(max_sges, ib_qib_max_sges, uint, S_IRUGO);
868c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
878c2ecf20Sopenharmony_ci
888c2ecf20Sopenharmony_ciunsigned int ib_qib_max_mcast_grps = 16384;
898c2ecf20Sopenharmony_cimodule_param_named(max_mcast_grps, ib_qib_max_mcast_grps, uint, S_IRUGO);
908c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_mcast_grps,
918c2ecf20Sopenharmony_ci		 "Maximum number of multicast groups to support");
928c2ecf20Sopenharmony_ci
938c2ecf20Sopenharmony_ciunsigned int ib_qib_max_mcast_qp_attached = 16;
948c2ecf20Sopenharmony_cimodule_param_named(max_mcast_qp_attached, ib_qib_max_mcast_qp_attached,
958c2ecf20Sopenharmony_ci		   uint, S_IRUGO);
968c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_mcast_qp_attached,
978c2ecf20Sopenharmony_ci		 "Maximum number of attached QPs to support");
988c2ecf20Sopenharmony_ci
998c2ecf20Sopenharmony_ciunsigned int ib_qib_max_srqs = 1024;
1008c2ecf20Sopenharmony_cimodule_param_named(max_srqs, ib_qib_max_srqs, uint, S_IRUGO);
1018c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
1028c2ecf20Sopenharmony_ci
1038c2ecf20Sopenharmony_ciunsigned int ib_qib_max_srq_sges = 128;
1048c2ecf20Sopenharmony_cimodule_param_named(max_srq_sges, ib_qib_max_srq_sges, uint, S_IRUGO);
1058c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
1068c2ecf20Sopenharmony_ci
1078c2ecf20Sopenharmony_ciunsigned int ib_qib_max_srq_wrs = 0x1FFFF;
1088c2ecf20Sopenharmony_cimodule_param_named(max_srq_wrs, ib_qib_max_srq_wrs, uint, S_IRUGO);
1098c2ecf20Sopenharmony_ciMODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
1108c2ecf20Sopenharmony_ci
1118c2ecf20Sopenharmony_cistatic unsigned int ib_qib_disable_sma;
1128c2ecf20Sopenharmony_cimodule_param_named(disable_sma, ib_qib_disable_sma, uint, S_IWUSR | S_IRUGO);
1138c2ecf20Sopenharmony_ciMODULE_PARM_DESC(disable_sma, "Disable the SMA");
1148c2ecf20Sopenharmony_ci
1158c2ecf20Sopenharmony_ci/*
1168c2ecf20Sopenharmony_ci * Translate ib_wr_opcode into ib_wc_opcode.
1178c2ecf20Sopenharmony_ci */
1188c2ecf20Sopenharmony_ciconst enum ib_wc_opcode ib_qib_wc_opcode[] = {
1198c2ecf20Sopenharmony_ci	[IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
1208c2ecf20Sopenharmony_ci	[IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
1218c2ecf20Sopenharmony_ci	[IB_WR_SEND] = IB_WC_SEND,
1228c2ecf20Sopenharmony_ci	[IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
1238c2ecf20Sopenharmony_ci	[IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
1248c2ecf20Sopenharmony_ci	[IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
1258c2ecf20Sopenharmony_ci	[IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD
1268c2ecf20Sopenharmony_ci};
1278c2ecf20Sopenharmony_ci
1288c2ecf20Sopenharmony_ci/*
1298c2ecf20Sopenharmony_ci * System image GUID.
1308c2ecf20Sopenharmony_ci */
1318c2ecf20Sopenharmony_ci__be64 ib_qib_sys_image_guid;
1328c2ecf20Sopenharmony_ci
1338c2ecf20Sopenharmony_ci/*
1348c2ecf20Sopenharmony_ci * Count the number of DMA descriptors needed to send length bytes of data.
1358c2ecf20Sopenharmony_ci * Don't modify the qib_sge_state to get the count.
1368c2ecf20Sopenharmony_ci * Return zero if any of the segments is not aligned.
1378c2ecf20Sopenharmony_ci */
1388c2ecf20Sopenharmony_cistatic u32 qib_count_sge(struct rvt_sge_state *ss, u32 length)
1398c2ecf20Sopenharmony_ci{
1408c2ecf20Sopenharmony_ci	struct rvt_sge *sg_list = ss->sg_list;
1418c2ecf20Sopenharmony_ci	struct rvt_sge sge = ss->sge;
1428c2ecf20Sopenharmony_ci	u8 num_sge = ss->num_sge;
1438c2ecf20Sopenharmony_ci	u32 ndesc = 1;  /* count the header */
1448c2ecf20Sopenharmony_ci
1458c2ecf20Sopenharmony_ci	while (length) {
1468c2ecf20Sopenharmony_ci		u32 len = rvt_get_sge_length(&sge, length);
1478c2ecf20Sopenharmony_ci
1488c2ecf20Sopenharmony_ci		if (((long) sge.vaddr & (sizeof(u32) - 1)) ||
1498c2ecf20Sopenharmony_ci		    (len != length && (len & (sizeof(u32) - 1)))) {
1508c2ecf20Sopenharmony_ci			ndesc = 0;
1518c2ecf20Sopenharmony_ci			break;
1528c2ecf20Sopenharmony_ci		}
1538c2ecf20Sopenharmony_ci		ndesc++;
1548c2ecf20Sopenharmony_ci		sge.vaddr += len;
1558c2ecf20Sopenharmony_ci		sge.length -= len;
1568c2ecf20Sopenharmony_ci		sge.sge_length -= len;
1578c2ecf20Sopenharmony_ci		if (sge.sge_length == 0) {
1588c2ecf20Sopenharmony_ci			if (--num_sge)
1598c2ecf20Sopenharmony_ci				sge = *sg_list++;
1608c2ecf20Sopenharmony_ci		} else if (sge.length == 0 && sge.mr->lkey) {
1618c2ecf20Sopenharmony_ci			if (++sge.n >= RVT_SEGSZ) {
1628c2ecf20Sopenharmony_ci				if (++sge.m >= sge.mr->mapsz)
1638c2ecf20Sopenharmony_ci					break;
1648c2ecf20Sopenharmony_ci				sge.n = 0;
1658c2ecf20Sopenharmony_ci			}
1668c2ecf20Sopenharmony_ci			sge.vaddr =
1678c2ecf20Sopenharmony_ci				sge.mr->map[sge.m]->segs[sge.n].vaddr;
1688c2ecf20Sopenharmony_ci			sge.length =
1698c2ecf20Sopenharmony_ci				sge.mr->map[sge.m]->segs[sge.n].length;
1708c2ecf20Sopenharmony_ci		}
1718c2ecf20Sopenharmony_ci		length -= len;
1728c2ecf20Sopenharmony_ci	}
1738c2ecf20Sopenharmony_ci	return ndesc;
1748c2ecf20Sopenharmony_ci}
1758c2ecf20Sopenharmony_ci
1768c2ecf20Sopenharmony_ci/*
1778c2ecf20Sopenharmony_ci * Copy from the SGEs to the data buffer.
1788c2ecf20Sopenharmony_ci */
1798c2ecf20Sopenharmony_cistatic void qib_copy_from_sge(void *data, struct rvt_sge_state *ss, u32 length)
1808c2ecf20Sopenharmony_ci{
1818c2ecf20Sopenharmony_ci	struct rvt_sge *sge = &ss->sge;
1828c2ecf20Sopenharmony_ci
1838c2ecf20Sopenharmony_ci	while (length) {
1848c2ecf20Sopenharmony_ci		u32 len = rvt_get_sge_length(sge, length);
1858c2ecf20Sopenharmony_ci
1868c2ecf20Sopenharmony_ci		memcpy(data, sge->vaddr, len);
1878c2ecf20Sopenharmony_ci		sge->vaddr += len;
1888c2ecf20Sopenharmony_ci		sge->length -= len;
1898c2ecf20Sopenharmony_ci		sge->sge_length -= len;
1908c2ecf20Sopenharmony_ci		if (sge->sge_length == 0) {
1918c2ecf20Sopenharmony_ci			if (--ss->num_sge)
1928c2ecf20Sopenharmony_ci				*sge = *ss->sg_list++;
1938c2ecf20Sopenharmony_ci		} else if (sge->length == 0 && sge->mr->lkey) {
1948c2ecf20Sopenharmony_ci			if (++sge->n >= RVT_SEGSZ) {
1958c2ecf20Sopenharmony_ci				if (++sge->m >= sge->mr->mapsz)
1968c2ecf20Sopenharmony_ci					break;
1978c2ecf20Sopenharmony_ci				sge->n = 0;
1988c2ecf20Sopenharmony_ci			}
1998c2ecf20Sopenharmony_ci			sge->vaddr =
2008c2ecf20Sopenharmony_ci				sge->mr->map[sge->m]->segs[sge->n].vaddr;
2018c2ecf20Sopenharmony_ci			sge->length =
2028c2ecf20Sopenharmony_ci				sge->mr->map[sge->m]->segs[sge->n].length;
2038c2ecf20Sopenharmony_ci		}
2048c2ecf20Sopenharmony_ci		data += len;
2058c2ecf20Sopenharmony_ci		length -= len;
2068c2ecf20Sopenharmony_ci	}
2078c2ecf20Sopenharmony_ci}
2088c2ecf20Sopenharmony_ci
2098c2ecf20Sopenharmony_ci/**
2108c2ecf20Sopenharmony_ci * qib_qp_rcv - processing an incoming packet on a QP
2118c2ecf20Sopenharmony_ci * @rcd: the context pointer
2128c2ecf20Sopenharmony_ci * @hdr: the packet header
2138c2ecf20Sopenharmony_ci * @has_grh: true if the packet has a GRH
2148c2ecf20Sopenharmony_ci * @data: the packet data
2158c2ecf20Sopenharmony_ci * @tlen: the packet length
2168c2ecf20Sopenharmony_ci * @qp: the QP the packet came on
2178c2ecf20Sopenharmony_ci *
2188c2ecf20Sopenharmony_ci * This is called from qib_ib_rcv() to process an incoming packet
2198c2ecf20Sopenharmony_ci * for the given QP.
2208c2ecf20Sopenharmony_ci * Called at interrupt level.
2218c2ecf20Sopenharmony_ci */
2228c2ecf20Sopenharmony_cistatic void qib_qp_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
2238c2ecf20Sopenharmony_ci		       int has_grh, void *data, u32 tlen, struct rvt_qp *qp)
2248c2ecf20Sopenharmony_ci{
2258c2ecf20Sopenharmony_ci	struct qib_ibport *ibp = &rcd->ppd->ibport_data;
2268c2ecf20Sopenharmony_ci
2278c2ecf20Sopenharmony_ci	spin_lock(&qp->r_lock);
2288c2ecf20Sopenharmony_ci
2298c2ecf20Sopenharmony_ci	/* Check for valid receive state. */
2308c2ecf20Sopenharmony_ci	if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) {
2318c2ecf20Sopenharmony_ci		ibp->rvp.n_pkt_drops++;
2328c2ecf20Sopenharmony_ci		goto unlock;
2338c2ecf20Sopenharmony_ci	}
2348c2ecf20Sopenharmony_ci
2358c2ecf20Sopenharmony_ci	switch (qp->ibqp.qp_type) {
2368c2ecf20Sopenharmony_ci	case IB_QPT_SMI:
2378c2ecf20Sopenharmony_ci	case IB_QPT_GSI:
2388c2ecf20Sopenharmony_ci		if (ib_qib_disable_sma)
2398c2ecf20Sopenharmony_ci			break;
2408c2ecf20Sopenharmony_ci		fallthrough;
2418c2ecf20Sopenharmony_ci	case IB_QPT_UD:
2428c2ecf20Sopenharmony_ci		qib_ud_rcv(ibp, hdr, has_grh, data, tlen, qp);
2438c2ecf20Sopenharmony_ci		break;
2448c2ecf20Sopenharmony_ci
2458c2ecf20Sopenharmony_ci	case IB_QPT_RC:
2468c2ecf20Sopenharmony_ci		qib_rc_rcv(rcd, hdr, has_grh, data, tlen, qp);
2478c2ecf20Sopenharmony_ci		break;
2488c2ecf20Sopenharmony_ci
2498c2ecf20Sopenharmony_ci	case IB_QPT_UC:
2508c2ecf20Sopenharmony_ci		qib_uc_rcv(ibp, hdr, has_grh, data, tlen, qp);
2518c2ecf20Sopenharmony_ci		break;
2528c2ecf20Sopenharmony_ci
2538c2ecf20Sopenharmony_ci	default:
2548c2ecf20Sopenharmony_ci		break;
2558c2ecf20Sopenharmony_ci	}
2568c2ecf20Sopenharmony_ci
2578c2ecf20Sopenharmony_ciunlock:
2588c2ecf20Sopenharmony_ci	spin_unlock(&qp->r_lock);
2598c2ecf20Sopenharmony_ci}
2608c2ecf20Sopenharmony_ci
2618c2ecf20Sopenharmony_ci/**
2628c2ecf20Sopenharmony_ci * qib_ib_rcv - process an incoming packet
2638c2ecf20Sopenharmony_ci * @rcd: the context pointer
2648c2ecf20Sopenharmony_ci * @rhdr: the header of the packet
2658c2ecf20Sopenharmony_ci * @data: the packet payload
2668c2ecf20Sopenharmony_ci * @tlen: the packet length
2678c2ecf20Sopenharmony_ci *
2688c2ecf20Sopenharmony_ci * This is called from qib_kreceive() to process an incoming packet at
2698c2ecf20Sopenharmony_ci * interrupt level. Tlen is the length of the header + data + CRC in bytes.
2708c2ecf20Sopenharmony_ci */
2718c2ecf20Sopenharmony_civoid qib_ib_rcv(struct qib_ctxtdata *rcd, void *rhdr, void *data, u32 tlen)
2728c2ecf20Sopenharmony_ci{
2738c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = rcd->ppd;
2748c2ecf20Sopenharmony_ci	struct qib_ibport *ibp = &ppd->ibport_data;
2758c2ecf20Sopenharmony_ci	struct ib_header *hdr = rhdr;
2768c2ecf20Sopenharmony_ci	struct qib_devdata *dd = ppd->dd;
2778c2ecf20Sopenharmony_ci	struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
2788c2ecf20Sopenharmony_ci	struct ib_other_headers *ohdr;
2798c2ecf20Sopenharmony_ci	struct rvt_qp *qp;
2808c2ecf20Sopenharmony_ci	u32 qp_num;
2818c2ecf20Sopenharmony_ci	int lnh;
2828c2ecf20Sopenharmony_ci	u8 opcode;
2838c2ecf20Sopenharmony_ci	u16 lid;
2848c2ecf20Sopenharmony_ci
2858c2ecf20Sopenharmony_ci	/* 24 == LRH+BTH+CRC */
2868c2ecf20Sopenharmony_ci	if (unlikely(tlen < 24))
2878c2ecf20Sopenharmony_ci		goto drop;
2888c2ecf20Sopenharmony_ci
2898c2ecf20Sopenharmony_ci	/* Check for a valid destination LID (see ch. 7.11.1). */
2908c2ecf20Sopenharmony_ci	lid = be16_to_cpu(hdr->lrh[1]);
2918c2ecf20Sopenharmony_ci	if (lid < be16_to_cpu(IB_MULTICAST_LID_BASE)) {
2928c2ecf20Sopenharmony_ci		lid &= ~((1 << ppd->lmc) - 1);
2938c2ecf20Sopenharmony_ci		if (unlikely(lid != ppd->lid))
2948c2ecf20Sopenharmony_ci			goto drop;
2958c2ecf20Sopenharmony_ci	}
2968c2ecf20Sopenharmony_ci
2978c2ecf20Sopenharmony_ci	/* Check for GRH */
2988c2ecf20Sopenharmony_ci	lnh = be16_to_cpu(hdr->lrh[0]) & 3;
2998c2ecf20Sopenharmony_ci	if (lnh == QIB_LRH_BTH)
3008c2ecf20Sopenharmony_ci		ohdr = &hdr->u.oth;
3018c2ecf20Sopenharmony_ci	else if (lnh == QIB_LRH_GRH) {
3028c2ecf20Sopenharmony_ci		u32 vtf;
3038c2ecf20Sopenharmony_ci
3048c2ecf20Sopenharmony_ci		ohdr = &hdr->u.l.oth;
3058c2ecf20Sopenharmony_ci		if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR)
3068c2ecf20Sopenharmony_ci			goto drop;
3078c2ecf20Sopenharmony_ci		vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow);
3088c2ecf20Sopenharmony_ci		if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
3098c2ecf20Sopenharmony_ci			goto drop;
3108c2ecf20Sopenharmony_ci	} else
3118c2ecf20Sopenharmony_ci		goto drop;
3128c2ecf20Sopenharmony_ci
3138c2ecf20Sopenharmony_ci	opcode = (be32_to_cpu(ohdr->bth[0]) >> 24) & 0x7f;
3148c2ecf20Sopenharmony_ci#ifdef CONFIG_DEBUG_FS
3158c2ecf20Sopenharmony_ci	rcd->opstats->stats[opcode].n_bytes += tlen;
3168c2ecf20Sopenharmony_ci	rcd->opstats->stats[opcode].n_packets++;
3178c2ecf20Sopenharmony_ci#endif
3188c2ecf20Sopenharmony_ci
3198c2ecf20Sopenharmony_ci	/* Get the destination QP number. */
3208c2ecf20Sopenharmony_ci	qp_num = be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK;
3218c2ecf20Sopenharmony_ci	if (qp_num == QIB_MULTICAST_QPN) {
3228c2ecf20Sopenharmony_ci		struct rvt_mcast *mcast;
3238c2ecf20Sopenharmony_ci		struct rvt_mcast_qp *p;
3248c2ecf20Sopenharmony_ci
3258c2ecf20Sopenharmony_ci		if (lnh != QIB_LRH_GRH)
3268c2ecf20Sopenharmony_ci			goto drop;
3278c2ecf20Sopenharmony_ci		mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid, lid);
3288c2ecf20Sopenharmony_ci		if (mcast == NULL)
3298c2ecf20Sopenharmony_ci			goto drop;
3308c2ecf20Sopenharmony_ci		this_cpu_inc(ibp->pmastats->n_multicast_rcv);
3318c2ecf20Sopenharmony_ci		rcu_read_lock();
3328c2ecf20Sopenharmony_ci		list_for_each_entry_rcu(p, &mcast->qp_list, list)
3338c2ecf20Sopenharmony_ci			qib_qp_rcv(rcd, hdr, 1, data, tlen, p->qp);
3348c2ecf20Sopenharmony_ci		rcu_read_unlock();
3358c2ecf20Sopenharmony_ci		/*
3368c2ecf20Sopenharmony_ci		 * Notify rvt_multicast_detach() if it is waiting for us
3378c2ecf20Sopenharmony_ci		 * to finish.
3388c2ecf20Sopenharmony_ci		 */
3398c2ecf20Sopenharmony_ci		if (atomic_dec_return(&mcast->refcount) <= 1)
3408c2ecf20Sopenharmony_ci			wake_up(&mcast->wait);
3418c2ecf20Sopenharmony_ci	} else {
3428c2ecf20Sopenharmony_ci		rcu_read_lock();
3438c2ecf20Sopenharmony_ci		qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
3448c2ecf20Sopenharmony_ci		if (!qp) {
3458c2ecf20Sopenharmony_ci			rcu_read_unlock();
3468c2ecf20Sopenharmony_ci			goto drop;
3478c2ecf20Sopenharmony_ci		}
3488c2ecf20Sopenharmony_ci		this_cpu_inc(ibp->pmastats->n_unicast_rcv);
3498c2ecf20Sopenharmony_ci		qib_qp_rcv(rcd, hdr, lnh == QIB_LRH_GRH, data, tlen, qp);
3508c2ecf20Sopenharmony_ci		rcu_read_unlock();
3518c2ecf20Sopenharmony_ci	}
3528c2ecf20Sopenharmony_ci	return;
3538c2ecf20Sopenharmony_ci
3548c2ecf20Sopenharmony_cidrop:
3558c2ecf20Sopenharmony_ci	ibp->rvp.n_pkt_drops++;
3568c2ecf20Sopenharmony_ci}
3578c2ecf20Sopenharmony_ci
3588c2ecf20Sopenharmony_ci/*
3598c2ecf20Sopenharmony_ci * This is called from a timer to check for QPs
3608c2ecf20Sopenharmony_ci * which need kernel memory in order to send a packet.
3618c2ecf20Sopenharmony_ci */
3628c2ecf20Sopenharmony_cistatic void mem_timer(struct timer_list *t)
3638c2ecf20Sopenharmony_ci{
3648c2ecf20Sopenharmony_ci	struct qib_ibdev *dev = from_timer(dev, t, mem_timer);
3658c2ecf20Sopenharmony_ci	struct list_head *list = &dev->memwait;
3668c2ecf20Sopenharmony_ci	struct rvt_qp *qp = NULL;
3678c2ecf20Sopenharmony_ci	struct qib_qp_priv *priv = NULL;
3688c2ecf20Sopenharmony_ci	unsigned long flags;
3698c2ecf20Sopenharmony_ci
3708c2ecf20Sopenharmony_ci	spin_lock_irqsave(&dev->rdi.pending_lock, flags);
3718c2ecf20Sopenharmony_ci	if (!list_empty(list)) {
3728c2ecf20Sopenharmony_ci		priv = list_entry(list->next, struct qib_qp_priv, iowait);
3738c2ecf20Sopenharmony_ci		qp = priv->owner;
3748c2ecf20Sopenharmony_ci		list_del_init(&priv->iowait);
3758c2ecf20Sopenharmony_ci		rvt_get_qp(qp);
3768c2ecf20Sopenharmony_ci		if (!list_empty(list))
3778c2ecf20Sopenharmony_ci			mod_timer(&dev->mem_timer, jiffies + 1);
3788c2ecf20Sopenharmony_ci	}
3798c2ecf20Sopenharmony_ci	spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
3808c2ecf20Sopenharmony_ci
3818c2ecf20Sopenharmony_ci	if (qp) {
3828c2ecf20Sopenharmony_ci		spin_lock_irqsave(&qp->s_lock, flags);
3838c2ecf20Sopenharmony_ci		if (qp->s_flags & RVT_S_WAIT_KMEM) {
3848c2ecf20Sopenharmony_ci			qp->s_flags &= ~RVT_S_WAIT_KMEM;
3858c2ecf20Sopenharmony_ci			qib_schedule_send(qp);
3868c2ecf20Sopenharmony_ci		}
3878c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&qp->s_lock, flags);
3888c2ecf20Sopenharmony_ci		rvt_put_qp(qp);
3898c2ecf20Sopenharmony_ci	}
3908c2ecf20Sopenharmony_ci}
3918c2ecf20Sopenharmony_ci
3928c2ecf20Sopenharmony_ci#ifdef __LITTLE_ENDIAN
3938c2ecf20Sopenharmony_cistatic inline u32 get_upper_bits(u32 data, u32 shift)
3948c2ecf20Sopenharmony_ci{
3958c2ecf20Sopenharmony_ci	return data >> shift;
3968c2ecf20Sopenharmony_ci}
3978c2ecf20Sopenharmony_ci
3988c2ecf20Sopenharmony_cistatic inline u32 set_upper_bits(u32 data, u32 shift)
3998c2ecf20Sopenharmony_ci{
4008c2ecf20Sopenharmony_ci	return data << shift;
4018c2ecf20Sopenharmony_ci}
4028c2ecf20Sopenharmony_ci
4038c2ecf20Sopenharmony_cistatic inline u32 clear_upper_bytes(u32 data, u32 n, u32 off)
4048c2ecf20Sopenharmony_ci{
4058c2ecf20Sopenharmony_ci	data <<= ((sizeof(u32) - n) * BITS_PER_BYTE);
4068c2ecf20Sopenharmony_ci	data >>= ((sizeof(u32) - n - off) * BITS_PER_BYTE);
4078c2ecf20Sopenharmony_ci	return data;
4088c2ecf20Sopenharmony_ci}
4098c2ecf20Sopenharmony_ci#else
4108c2ecf20Sopenharmony_cistatic inline u32 get_upper_bits(u32 data, u32 shift)
4118c2ecf20Sopenharmony_ci{
4128c2ecf20Sopenharmony_ci	return data << shift;
4138c2ecf20Sopenharmony_ci}
4148c2ecf20Sopenharmony_ci
4158c2ecf20Sopenharmony_cistatic inline u32 set_upper_bits(u32 data, u32 shift)
4168c2ecf20Sopenharmony_ci{
4178c2ecf20Sopenharmony_ci	return data >> shift;
4188c2ecf20Sopenharmony_ci}
4198c2ecf20Sopenharmony_ci
4208c2ecf20Sopenharmony_cistatic inline u32 clear_upper_bytes(u32 data, u32 n, u32 off)
4218c2ecf20Sopenharmony_ci{
4228c2ecf20Sopenharmony_ci	data >>= ((sizeof(u32) - n) * BITS_PER_BYTE);
4238c2ecf20Sopenharmony_ci	data <<= ((sizeof(u32) - n - off) * BITS_PER_BYTE);
4248c2ecf20Sopenharmony_ci	return data;
4258c2ecf20Sopenharmony_ci}
4268c2ecf20Sopenharmony_ci#endif
4278c2ecf20Sopenharmony_ci
4288c2ecf20Sopenharmony_cistatic void copy_io(u32 __iomem *piobuf, struct rvt_sge_state *ss,
4298c2ecf20Sopenharmony_ci		    u32 length, unsigned flush_wc)
4308c2ecf20Sopenharmony_ci{
4318c2ecf20Sopenharmony_ci	u32 extra = 0;
4328c2ecf20Sopenharmony_ci	u32 data = 0;
4338c2ecf20Sopenharmony_ci	u32 last;
4348c2ecf20Sopenharmony_ci
4358c2ecf20Sopenharmony_ci	while (1) {
4368c2ecf20Sopenharmony_ci		u32 len = rvt_get_sge_length(&ss->sge, length);
4378c2ecf20Sopenharmony_ci		u32 off;
4388c2ecf20Sopenharmony_ci
4398c2ecf20Sopenharmony_ci		/* If the source address is not aligned, try to align it. */
4408c2ecf20Sopenharmony_ci		off = (unsigned long)ss->sge.vaddr & (sizeof(u32) - 1);
4418c2ecf20Sopenharmony_ci		if (off) {
4428c2ecf20Sopenharmony_ci			u32 *addr = (u32 *)((unsigned long)ss->sge.vaddr &
4438c2ecf20Sopenharmony_ci					    ~(sizeof(u32) - 1));
4448c2ecf20Sopenharmony_ci			u32 v = get_upper_bits(*addr, off * BITS_PER_BYTE);
4458c2ecf20Sopenharmony_ci			u32 y;
4468c2ecf20Sopenharmony_ci
4478c2ecf20Sopenharmony_ci			y = sizeof(u32) - off;
4488c2ecf20Sopenharmony_ci			if (len > y)
4498c2ecf20Sopenharmony_ci				len = y;
4508c2ecf20Sopenharmony_ci			if (len + extra >= sizeof(u32)) {
4518c2ecf20Sopenharmony_ci				data |= set_upper_bits(v, extra *
4528c2ecf20Sopenharmony_ci						       BITS_PER_BYTE);
4538c2ecf20Sopenharmony_ci				len = sizeof(u32) - extra;
4548c2ecf20Sopenharmony_ci				if (len == length) {
4558c2ecf20Sopenharmony_ci					last = data;
4568c2ecf20Sopenharmony_ci					break;
4578c2ecf20Sopenharmony_ci				}
4588c2ecf20Sopenharmony_ci				__raw_writel(data, piobuf);
4598c2ecf20Sopenharmony_ci				piobuf++;
4608c2ecf20Sopenharmony_ci				extra = 0;
4618c2ecf20Sopenharmony_ci				data = 0;
4628c2ecf20Sopenharmony_ci			} else {
4638c2ecf20Sopenharmony_ci				/* Clear unused upper bytes */
4648c2ecf20Sopenharmony_ci				data |= clear_upper_bytes(v, len, extra);
4658c2ecf20Sopenharmony_ci				if (len == length) {
4668c2ecf20Sopenharmony_ci					last = data;
4678c2ecf20Sopenharmony_ci					break;
4688c2ecf20Sopenharmony_ci				}
4698c2ecf20Sopenharmony_ci				extra += len;
4708c2ecf20Sopenharmony_ci			}
4718c2ecf20Sopenharmony_ci		} else if (extra) {
4728c2ecf20Sopenharmony_ci			/* Source address is aligned. */
4738c2ecf20Sopenharmony_ci			u32 *addr = (u32 *) ss->sge.vaddr;
4748c2ecf20Sopenharmony_ci			int shift = extra * BITS_PER_BYTE;
4758c2ecf20Sopenharmony_ci			int ushift = 32 - shift;
4768c2ecf20Sopenharmony_ci			u32 l = len;
4778c2ecf20Sopenharmony_ci
4788c2ecf20Sopenharmony_ci			while (l >= sizeof(u32)) {
4798c2ecf20Sopenharmony_ci				u32 v = *addr;
4808c2ecf20Sopenharmony_ci
4818c2ecf20Sopenharmony_ci				data |= set_upper_bits(v, shift);
4828c2ecf20Sopenharmony_ci				__raw_writel(data, piobuf);
4838c2ecf20Sopenharmony_ci				data = get_upper_bits(v, ushift);
4848c2ecf20Sopenharmony_ci				piobuf++;
4858c2ecf20Sopenharmony_ci				addr++;
4868c2ecf20Sopenharmony_ci				l -= sizeof(u32);
4878c2ecf20Sopenharmony_ci			}
4888c2ecf20Sopenharmony_ci			/*
4898c2ecf20Sopenharmony_ci			 * We still have 'extra' number of bytes leftover.
4908c2ecf20Sopenharmony_ci			 */
4918c2ecf20Sopenharmony_ci			if (l) {
4928c2ecf20Sopenharmony_ci				u32 v = *addr;
4938c2ecf20Sopenharmony_ci
4948c2ecf20Sopenharmony_ci				if (l + extra >= sizeof(u32)) {
4958c2ecf20Sopenharmony_ci					data |= set_upper_bits(v, shift);
4968c2ecf20Sopenharmony_ci					len -= l + extra - sizeof(u32);
4978c2ecf20Sopenharmony_ci					if (len == length) {
4988c2ecf20Sopenharmony_ci						last = data;
4998c2ecf20Sopenharmony_ci						break;
5008c2ecf20Sopenharmony_ci					}
5018c2ecf20Sopenharmony_ci					__raw_writel(data, piobuf);
5028c2ecf20Sopenharmony_ci					piobuf++;
5038c2ecf20Sopenharmony_ci					extra = 0;
5048c2ecf20Sopenharmony_ci					data = 0;
5058c2ecf20Sopenharmony_ci				} else {
5068c2ecf20Sopenharmony_ci					/* Clear unused upper bytes */
5078c2ecf20Sopenharmony_ci					data |= clear_upper_bytes(v, l, extra);
5088c2ecf20Sopenharmony_ci					if (len == length) {
5098c2ecf20Sopenharmony_ci						last = data;
5108c2ecf20Sopenharmony_ci						break;
5118c2ecf20Sopenharmony_ci					}
5128c2ecf20Sopenharmony_ci					extra += l;
5138c2ecf20Sopenharmony_ci				}
5148c2ecf20Sopenharmony_ci			} else if (len == length) {
5158c2ecf20Sopenharmony_ci				last = data;
5168c2ecf20Sopenharmony_ci				break;
5178c2ecf20Sopenharmony_ci			}
5188c2ecf20Sopenharmony_ci		} else if (len == length) {
5198c2ecf20Sopenharmony_ci			u32 w;
5208c2ecf20Sopenharmony_ci
5218c2ecf20Sopenharmony_ci			/*
5228c2ecf20Sopenharmony_ci			 * Need to round up for the last dword in the
5238c2ecf20Sopenharmony_ci			 * packet.
5248c2ecf20Sopenharmony_ci			 */
5258c2ecf20Sopenharmony_ci			w = (len + 3) >> 2;
5268c2ecf20Sopenharmony_ci			qib_pio_copy(piobuf, ss->sge.vaddr, w - 1);
5278c2ecf20Sopenharmony_ci			piobuf += w - 1;
5288c2ecf20Sopenharmony_ci			last = ((u32 *) ss->sge.vaddr)[w - 1];
5298c2ecf20Sopenharmony_ci			break;
5308c2ecf20Sopenharmony_ci		} else {
5318c2ecf20Sopenharmony_ci			u32 w = len >> 2;
5328c2ecf20Sopenharmony_ci
5338c2ecf20Sopenharmony_ci			qib_pio_copy(piobuf, ss->sge.vaddr, w);
5348c2ecf20Sopenharmony_ci			piobuf += w;
5358c2ecf20Sopenharmony_ci
5368c2ecf20Sopenharmony_ci			extra = len & (sizeof(u32) - 1);
5378c2ecf20Sopenharmony_ci			if (extra) {
5388c2ecf20Sopenharmony_ci				u32 v = ((u32 *) ss->sge.vaddr)[w];
5398c2ecf20Sopenharmony_ci
5408c2ecf20Sopenharmony_ci				/* Clear unused upper bytes */
5418c2ecf20Sopenharmony_ci				data = clear_upper_bytes(v, extra, 0);
5428c2ecf20Sopenharmony_ci			}
5438c2ecf20Sopenharmony_ci		}
5448c2ecf20Sopenharmony_ci		rvt_update_sge(ss, len, false);
5458c2ecf20Sopenharmony_ci		length -= len;
5468c2ecf20Sopenharmony_ci	}
5478c2ecf20Sopenharmony_ci	/* Update address before sending packet. */
5488c2ecf20Sopenharmony_ci	rvt_update_sge(ss, length, false);
5498c2ecf20Sopenharmony_ci	if (flush_wc) {
5508c2ecf20Sopenharmony_ci		/* must flush early everything before trigger word */
5518c2ecf20Sopenharmony_ci		qib_flush_wc();
5528c2ecf20Sopenharmony_ci		__raw_writel(last, piobuf);
5538c2ecf20Sopenharmony_ci		/* be sure trigger word is written */
5548c2ecf20Sopenharmony_ci		qib_flush_wc();
5558c2ecf20Sopenharmony_ci	} else
5568c2ecf20Sopenharmony_ci		__raw_writel(last, piobuf);
5578c2ecf20Sopenharmony_ci}
5588c2ecf20Sopenharmony_ci
5598c2ecf20Sopenharmony_cistatic noinline struct qib_verbs_txreq *__get_txreq(struct qib_ibdev *dev,
5608c2ecf20Sopenharmony_ci					   struct rvt_qp *qp)
5618c2ecf20Sopenharmony_ci{
5628c2ecf20Sopenharmony_ci	struct qib_qp_priv *priv = qp->priv;
5638c2ecf20Sopenharmony_ci	struct qib_verbs_txreq *tx;
5648c2ecf20Sopenharmony_ci	unsigned long flags;
5658c2ecf20Sopenharmony_ci
5668c2ecf20Sopenharmony_ci	spin_lock_irqsave(&qp->s_lock, flags);
5678c2ecf20Sopenharmony_ci	spin_lock(&dev->rdi.pending_lock);
5688c2ecf20Sopenharmony_ci
5698c2ecf20Sopenharmony_ci	if (!list_empty(&dev->txreq_free)) {
5708c2ecf20Sopenharmony_ci		struct list_head *l = dev->txreq_free.next;
5718c2ecf20Sopenharmony_ci
5728c2ecf20Sopenharmony_ci		list_del(l);
5738c2ecf20Sopenharmony_ci		spin_unlock(&dev->rdi.pending_lock);
5748c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&qp->s_lock, flags);
5758c2ecf20Sopenharmony_ci		tx = list_entry(l, struct qib_verbs_txreq, txreq.list);
5768c2ecf20Sopenharmony_ci	} else {
5778c2ecf20Sopenharmony_ci		if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK &&
5788c2ecf20Sopenharmony_ci		    list_empty(&priv->iowait)) {
5798c2ecf20Sopenharmony_ci			dev->n_txwait++;
5808c2ecf20Sopenharmony_ci			qp->s_flags |= RVT_S_WAIT_TX;
5818c2ecf20Sopenharmony_ci			list_add_tail(&priv->iowait, &dev->txwait);
5828c2ecf20Sopenharmony_ci		}
5838c2ecf20Sopenharmony_ci		qp->s_flags &= ~RVT_S_BUSY;
5848c2ecf20Sopenharmony_ci		spin_unlock(&dev->rdi.pending_lock);
5858c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&qp->s_lock, flags);
5868c2ecf20Sopenharmony_ci		tx = ERR_PTR(-EBUSY);
5878c2ecf20Sopenharmony_ci	}
5888c2ecf20Sopenharmony_ci	return tx;
5898c2ecf20Sopenharmony_ci}
5908c2ecf20Sopenharmony_ci
5918c2ecf20Sopenharmony_cistatic inline struct qib_verbs_txreq *get_txreq(struct qib_ibdev *dev,
5928c2ecf20Sopenharmony_ci					 struct rvt_qp *qp)
5938c2ecf20Sopenharmony_ci{
5948c2ecf20Sopenharmony_ci	struct qib_verbs_txreq *tx;
5958c2ecf20Sopenharmony_ci	unsigned long flags;
5968c2ecf20Sopenharmony_ci
5978c2ecf20Sopenharmony_ci	spin_lock_irqsave(&dev->rdi.pending_lock, flags);
5988c2ecf20Sopenharmony_ci	/* assume the list non empty */
5998c2ecf20Sopenharmony_ci	if (likely(!list_empty(&dev->txreq_free))) {
6008c2ecf20Sopenharmony_ci		struct list_head *l = dev->txreq_free.next;
6018c2ecf20Sopenharmony_ci
6028c2ecf20Sopenharmony_ci		list_del(l);
6038c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
6048c2ecf20Sopenharmony_ci		tx = list_entry(l, struct qib_verbs_txreq, txreq.list);
6058c2ecf20Sopenharmony_ci	} else {
6068c2ecf20Sopenharmony_ci		/* call slow path to get the extra lock */
6078c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
6088c2ecf20Sopenharmony_ci		tx =  __get_txreq(dev, qp);
6098c2ecf20Sopenharmony_ci	}
6108c2ecf20Sopenharmony_ci	return tx;
6118c2ecf20Sopenharmony_ci}
6128c2ecf20Sopenharmony_ci
6138c2ecf20Sopenharmony_civoid qib_put_txreq(struct qib_verbs_txreq *tx)
6148c2ecf20Sopenharmony_ci{
6158c2ecf20Sopenharmony_ci	struct qib_ibdev *dev;
6168c2ecf20Sopenharmony_ci	struct rvt_qp *qp;
6178c2ecf20Sopenharmony_ci	struct qib_qp_priv *priv;
6188c2ecf20Sopenharmony_ci	unsigned long flags;
6198c2ecf20Sopenharmony_ci
6208c2ecf20Sopenharmony_ci	qp = tx->qp;
6218c2ecf20Sopenharmony_ci	dev = to_idev(qp->ibqp.device);
6228c2ecf20Sopenharmony_ci
6238c2ecf20Sopenharmony_ci	if (tx->mr) {
6248c2ecf20Sopenharmony_ci		rvt_put_mr(tx->mr);
6258c2ecf20Sopenharmony_ci		tx->mr = NULL;
6268c2ecf20Sopenharmony_ci	}
6278c2ecf20Sopenharmony_ci	if (tx->txreq.flags & QIB_SDMA_TXREQ_F_FREEBUF) {
6288c2ecf20Sopenharmony_ci		tx->txreq.flags &= ~QIB_SDMA_TXREQ_F_FREEBUF;
6298c2ecf20Sopenharmony_ci		dma_unmap_single(&dd_from_dev(dev)->pcidev->dev,
6308c2ecf20Sopenharmony_ci				 tx->txreq.addr, tx->hdr_dwords << 2,
6318c2ecf20Sopenharmony_ci				 DMA_TO_DEVICE);
6328c2ecf20Sopenharmony_ci		kfree(tx->align_buf);
6338c2ecf20Sopenharmony_ci	}
6348c2ecf20Sopenharmony_ci
6358c2ecf20Sopenharmony_ci	spin_lock_irqsave(&dev->rdi.pending_lock, flags);
6368c2ecf20Sopenharmony_ci
6378c2ecf20Sopenharmony_ci	/* Put struct back on free list */
6388c2ecf20Sopenharmony_ci	list_add(&tx->txreq.list, &dev->txreq_free);
6398c2ecf20Sopenharmony_ci
6408c2ecf20Sopenharmony_ci	if (!list_empty(&dev->txwait)) {
6418c2ecf20Sopenharmony_ci		/* Wake up first QP wanting a free struct */
6428c2ecf20Sopenharmony_ci		priv = list_entry(dev->txwait.next, struct qib_qp_priv,
6438c2ecf20Sopenharmony_ci				  iowait);
6448c2ecf20Sopenharmony_ci		qp = priv->owner;
6458c2ecf20Sopenharmony_ci		list_del_init(&priv->iowait);
6468c2ecf20Sopenharmony_ci		rvt_get_qp(qp);
6478c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
6488c2ecf20Sopenharmony_ci
6498c2ecf20Sopenharmony_ci		spin_lock_irqsave(&qp->s_lock, flags);
6508c2ecf20Sopenharmony_ci		if (qp->s_flags & RVT_S_WAIT_TX) {
6518c2ecf20Sopenharmony_ci			qp->s_flags &= ~RVT_S_WAIT_TX;
6528c2ecf20Sopenharmony_ci			qib_schedule_send(qp);
6538c2ecf20Sopenharmony_ci		}
6548c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&qp->s_lock, flags);
6558c2ecf20Sopenharmony_ci
6568c2ecf20Sopenharmony_ci		rvt_put_qp(qp);
6578c2ecf20Sopenharmony_ci	} else
6588c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
6598c2ecf20Sopenharmony_ci}
6608c2ecf20Sopenharmony_ci
6618c2ecf20Sopenharmony_ci/*
6628c2ecf20Sopenharmony_ci * This is called when there are send DMA descriptors that might be
6638c2ecf20Sopenharmony_ci * available.
6648c2ecf20Sopenharmony_ci *
6658c2ecf20Sopenharmony_ci * This is called with ppd->sdma_lock held.
6668c2ecf20Sopenharmony_ci */
6678c2ecf20Sopenharmony_civoid qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail)
6688c2ecf20Sopenharmony_ci{
6698c2ecf20Sopenharmony_ci	struct rvt_qp *qp;
6708c2ecf20Sopenharmony_ci	struct qib_qp_priv *qpp, *nqpp;
6718c2ecf20Sopenharmony_ci	struct rvt_qp *qps[20];
6728c2ecf20Sopenharmony_ci	struct qib_ibdev *dev;
6738c2ecf20Sopenharmony_ci	unsigned i, n;
6748c2ecf20Sopenharmony_ci
6758c2ecf20Sopenharmony_ci	n = 0;
6768c2ecf20Sopenharmony_ci	dev = &ppd->dd->verbs_dev;
6778c2ecf20Sopenharmony_ci	spin_lock(&dev->rdi.pending_lock);
6788c2ecf20Sopenharmony_ci
6798c2ecf20Sopenharmony_ci	/* Search wait list for first QP wanting DMA descriptors. */
6808c2ecf20Sopenharmony_ci	list_for_each_entry_safe(qpp, nqpp, &dev->dmawait, iowait) {
6818c2ecf20Sopenharmony_ci		qp = qpp->owner;
6828c2ecf20Sopenharmony_ci		if (qp->port_num != ppd->port)
6838c2ecf20Sopenharmony_ci			continue;
6848c2ecf20Sopenharmony_ci		if (n == ARRAY_SIZE(qps))
6858c2ecf20Sopenharmony_ci			break;
6868c2ecf20Sopenharmony_ci		if (qpp->s_tx->txreq.sg_count > avail)
6878c2ecf20Sopenharmony_ci			break;
6888c2ecf20Sopenharmony_ci		avail -= qpp->s_tx->txreq.sg_count;
6898c2ecf20Sopenharmony_ci		list_del_init(&qpp->iowait);
6908c2ecf20Sopenharmony_ci		rvt_get_qp(qp);
6918c2ecf20Sopenharmony_ci		qps[n++] = qp;
6928c2ecf20Sopenharmony_ci	}
6938c2ecf20Sopenharmony_ci
6948c2ecf20Sopenharmony_ci	spin_unlock(&dev->rdi.pending_lock);
6958c2ecf20Sopenharmony_ci
6968c2ecf20Sopenharmony_ci	for (i = 0; i < n; i++) {
6978c2ecf20Sopenharmony_ci		qp = qps[i];
6988c2ecf20Sopenharmony_ci		spin_lock(&qp->s_lock);
6998c2ecf20Sopenharmony_ci		if (qp->s_flags & RVT_S_WAIT_DMA_DESC) {
7008c2ecf20Sopenharmony_ci			qp->s_flags &= ~RVT_S_WAIT_DMA_DESC;
7018c2ecf20Sopenharmony_ci			qib_schedule_send(qp);
7028c2ecf20Sopenharmony_ci		}
7038c2ecf20Sopenharmony_ci		spin_unlock(&qp->s_lock);
7048c2ecf20Sopenharmony_ci		rvt_put_qp(qp);
7058c2ecf20Sopenharmony_ci	}
7068c2ecf20Sopenharmony_ci}
7078c2ecf20Sopenharmony_ci
7088c2ecf20Sopenharmony_ci/*
7098c2ecf20Sopenharmony_ci * This is called with ppd->sdma_lock held.
7108c2ecf20Sopenharmony_ci */
7118c2ecf20Sopenharmony_cistatic void sdma_complete(struct qib_sdma_txreq *cookie, int status)
7128c2ecf20Sopenharmony_ci{
7138c2ecf20Sopenharmony_ci	struct qib_verbs_txreq *tx =
7148c2ecf20Sopenharmony_ci		container_of(cookie, struct qib_verbs_txreq, txreq);
7158c2ecf20Sopenharmony_ci	struct rvt_qp *qp = tx->qp;
7168c2ecf20Sopenharmony_ci	struct qib_qp_priv *priv = qp->priv;
7178c2ecf20Sopenharmony_ci
7188c2ecf20Sopenharmony_ci	spin_lock(&qp->s_lock);
7198c2ecf20Sopenharmony_ci	if (tx->wqe)
7208c2ecf20Sopenharmony_ci		rvt_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
7218c2ecf20Sopenharmony_ci	else if (qp->ibqp.qp_type == IB_QPT_RC) {
7228c2ecf20Sopenharmony_ci		struct ib_header *hdr;
7238c2ecf20Sopenharmony_ci
7248c2ecf20Sopenharmony_ci		if (tx->txreq.flags & QIB_SDMA_TXREQ_F_FREEBUF)
7258c2ecf20Sopenharmony_ci			hdr = &tx->align_buf->hdr;
7268c2ecf20Sopenharmony_ci		else {
7278c2ecf20Sopenharmony_ci			struct qib_ibdev *dev = to_idev(qp->ibqp.device);
7288c2ecf20Sopenharmony_ci
7298c2ecf20Sopenharmony_ci			hdr = &dev->pio_hdrs[tx->hdr_inx].hdr;
7308c2ecf20Sopenharmony_ci		}
7318c2ecf20Sopenharmony_ci		qib_rc_send_complete(qp, hdr);
7328c2ecf20Sopenharmony_ci	}
7338c2ecf20Sopenharmony_ci	if (atomic_dec_and_test(&priv->s_dma_busy)) {
7348c2ecf20Sopenharmony_ci		if (qp->state == IB_QPS_RESET)
7358c2ecf20Sopenharmony_ci			wake_up(&priv->wait_dma);
7368c2ecf20Sopenharmony_ci		else if (qp->s_flags & RVT_S_WAIT_DMA) {
7378c2ecf20Sopenharmony_ci			qp->s_flags &= ~RVT_S_WAIT_DMA;
7388c2ecf20Sopenharmony_ci			qib_schedule_send(qp);
7398c2ecf20Sopenharmony_ci		}
7408c2ecf20Sopenharmony_ci	}
7418c2ecf20Sopenharmony_ci	spin_unlock(&qp->s_lock);
7428c2ecf20Sopenharmony_ci
7438c2ecf20Sopenharmony_ci	qib_put_txreq(tx);
7448c2ecf20Sopenharmony_ci}
7458c2ecf20Sopenharmony_ci
7468c2ecf20Sopenharmony_cistatic int wait_kmem(struct qib_ibdev *dev, struct rvt_qp *qp)
7478c2ecf20Sopenharmony_ci{
7488c2ecf20Sopenharmony_ci	struct qib_qp_priv *priv = qp->priv;
7498c2ecf20Sopenharmony_ci	unsigned long flags;
7508c2ecf20Sopenharmony_ci	int ret = 0;
7518c2ecf20Sopenharmony_ci
7528c2ecf20Sopenharmony_ci	spin_lock_irqsave(&qp->s_lock, flags);
7538c2ecf20Sopenharmony_ci	if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
7548c2ecf20Sopenharmony_ci		spin_lock(&dev->rdi.pending_lock);
7558c2ecf20Sopenharmony_ci		if (list_empty(&priv->iowait)) {
7568c2ecf20Sopenharmony_ci			if (list_empty(&dev->memwait))
7578c2ecf20Sopenharmony_ci				mod_timer(&dev->mem_timer, jiffies + 1);
7588c2ecf20Sopenharmony_ci			qp->s_flags |= RVT_S_WAIT_KMEM;
7598c2ecf20Sopenharmony_ci			list_add_tail(&priv->iowait, &dev->memwait);
7608c2ecf20Sopenharmony_ci		}
7618c2ecf20Sopenharmony_ci		spin_unlock(&dev->rdi.pending_lock);
7628c2ecf20Sopenharmony_ci		qp->s_flags &= ~RVT_S_BUSY;
7638c2ecf20Sopenharmony_ci		ret = -EBUSY;
7648c2ecf20Sopenharmony_ci	}
7658c2ecf20Sopenharmony_ci	spin_unlock_irqrestore(&qp->s_lock, flags);
7668c2ecf20Sopenharmony_ci
7678c2ecf20Sopenharmony_ci	return ret;
7688c2ecf20Sopenharmony_ci}
7698c2ecf20Sopenharmony_ci
7708c2ecf20Sopenharmony_cistatic int qib_verbs_send_dma(struct rvt_qp *qp, struct ib_header *hdr,
7718c2ecf20Sopenharmony_ci			      u32 hdrwords, struct rvt_sge_state *ss, u32 len,
7728c2ecf20Sopenharmony_ci			      u32 plen, u32 dwords)
7738c2ecf20Sopenharmony_ci{
7748c2ecf20Sopenharmony_ci	struct qib_qp_priv *priv = qp->priv;
7758c2ecf20Sopenharmony_ci	struct qib_ibdev *dev = to_idev(qp->ibqp.device);
7768c2ecf20Sopenharmony_ci	struct qib_devdata *dd = dd_from_dev(dev);
7778c2ecf20Sopenharmony_ci	struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
7788c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = ppd_from_ibp(ibp);
7798c2ecf20Sopenharmony_ci	struct qib_verbs_txreq *tx;
7808c2ecf20Sopenharmony_ci	struct qib_pio_header *phdr;
7818c2ecf20Sopenharmony_ci	u32 control;
7828c2ecf20Sopenharmony_ci	u32 ndesc;
7838c2ecf20Sopenharmony_ci	int ret;
7848c2ecf20Sopenharmony_ci
7858c2ecf20Sopenharmony_ci	tx = priv->s_tx;
7868c2ecf20Sopenharmony_ci	if (tx) {
7878c2ecf20Sopenharmony_ci		priv->s_tx = NULL;
7888c2ecf20Sopenharmony_ci		/* resend previously constructed packet */
7898c2ecf20Sopenharmony_ci		ret = qib_sdma_verbs_send(ppd, tx->ss, tx->dwords, tx);
7908c2ecf20Sopenharmony_ci		goto bail;
7918c2ecf20Sopenharmony_ci	}
7928c2ecf20Sopenharmony_ci
7938c2ecf20Sopenharmony_ci	tx = get_txreq(dev, qp);
7948c2ecf20Sopenharmony_ci	if (IS_ERR(tx))
7958c2ecf20Sopenharmony_ci		goto bail_tx;
7968c2ecf20Sopenharmony_ci
7978c2ecf20Sopenharmony_ci	control = dd->f_setpbc_control(ppd, plen, qp->s_srate,
7988c2ecf20Sopenharmony_ci				       be16_to_cpu(hdr->lrh[0]) >> 12);
7998c2ecf20Sopenharmony_ci	tx->qp = qp;
8008c2ecf20Sopenharmony_ci	tx->wqe = qp->s_wqe;
8018c2ecf20Sopenharmony_ci	tx->mr = qp->s_rdma_mr;
8028c2ecf20Sopenharmony_ci	if (qp->s_rdma_mr)
8038c2ecf20Sopenharmony_ci		qp->s_rdma_mr = NULL;
8048c2ecf20Sopenharmony_ci	tx->txreq.callback = sdma_complete;
8058c2ecf20Sopenharmony_ci	if (dd->flags & QIB_HAS_SDMA_TIMEOUT)
8068c2ecf20Sopenharmony_ci		tx->txreq.flags = QIB_SDMA_TXREQ_F_HEADTOHOST;
8078c2ecf20Sopenharmony_ci	else
8088c2ecf20Sopenharmony_ci		tx->txreq.flags = QIB_SDMA_TXREQ_F_INTREQ;
8098c2ecf20Sopenharmony_ci	if (plen + 1 > dd->piosize2kmax_dwords)
8108c2ecf20Sopenharmony_ci		tx->txreq.flags |= QIB_SDMA_TXREQ_F_USELARGEBUF;
8118c2ecf20Sopenharmony_ci
8128c2ecf20Sopenharmony_ci	if (len) {
8138c2ecf20Sopenharmony_ci		/*
8148c2ecf20Sopenharmony_ci		 * Don't try to DMA if it takes more descriptors than
8158c2ecf20Sopenharmony_ci		 * the queue holds.
8168c2ecf20Sopenharmony_ci		 */
8178c2ecf20Sopenharmony_ci		ndesc = qib_count_sge(ss, len);
8188c2ecf20Sopenharmony_ci		if (ndesc >= ppd->sdma_descq_cnt)
8198c2ecf20Sopenharmony_ci			ndesc = 0;
8208c2ecf20Sopenharmony_ci	} else
8218c2ecf20Sopenharmony_ci		ndesc = 1;
8228c2ecf20Sopenharmony_ci	if (ndesc) {
8238c2ecf20Sopenharmony_ci		phdr = &dev->pio_hdrs[tx->hdr_inx];
8248c2ecf20Sopenharmony_ci		phdr->pbc[0] = cpu_to_le32(plen);
8258c2ecf20Sopenharmony_ci		phdr->pbc[1] = cpu_to_le32(control);
8268c2ecf20Sopenharmony_ci		memcpy(&phdr->hdr, hdr, hdrwords << 2);
8278c2ecf20Sopenharmony_ci		tx->txreq.flags |= QIB_SDMA_TXREQ_F_FREEDESC;
8288c2ecf20Sopenharmony_ci		tx->txreq.sg_count = ndesc;
8298c2ecf20Sopenharmony_ci		tx->txreq.addr = dev->pio_hdrs_phys +
8308c2ecf20Sopenharmony_ci			tx->hdr_inx * sizeof(struct qib_pio_header);
8318c2ecf20Sopenharmony_ci		tx->hdr_dwords = hdrwords + 2; /* add PBC length */
8328c2ecf20Sopenharmony_ci		ret = qib_sdma_verbs_send(ppd, ss, dwords, tx);
8338c2ecf20Sopenharmony_ci		goto bail;
8348c2ecf20Sopenharmony_ci	}
8358c2ecf20Sopenharmony_ci
8368c2ecf20Sopenharmony_ci	/* Allocate a buffer and copy the header and payload to it. */
8378c2ecf20Sopenharmony_ci	tx->hdr_dwords = plen + 1;
8388c2ecf20Sopenharmony_ci	phdr = kmalloc(tx->hdr_dwords << 2, GFP_ATOMIC);
8398c2ecf20Sopenharmony_ci	if (!phdr)
8408c2ecf20Sopenharmony_ci		goto err_tx;
8418c2ecf20Sopenharmony_ci	phdr->pbc[0] = cpu_to_le32(plen);
8428c2ecf20Sopenharmony_ci	phdr->pbc[1] = cpu_to_le32(control);
8438c2ecf20Sopenharmony_ci	memcpy(&phdr->hdr, hdr, hdrwords << 2);
8448c2ecf20Sopenharmony_ci	qib_copy_from_sge((u32 *) &phdr->hdr + hdrwords, ss, len);
8458c2ecf20Sopenharmony_ci
8468c2ecf20Sopenharmony_ci	tx->txreq.addr = dma_map_single(&dd->pcidev->dev, phdr,
8478c2ecf20Sopenharmony_ci					tx->hdr_dwords << 2, DMA_TO_DEVICE);
8488c2ecf20Sopenharmony_ci	if (dma_mapping_error(&dd->pcidev->dev, tx->txreq.addr))
8498c2ecf20Sopenharmony_ci		goto map_err;
8508c2ecf20Sopenharmony_ci	tx->align_buf = phdr;
8518c2ecf20Sopenharmony_ci	tx->txreq.flags |= QIB_SDMA_TXREQ_F_FREEBUF;
8528c2ecf20Sopenharmony_ci	tx->txreq.sg_count = 1;
8538c2ecf20Sopenharmony_ci	ret = qib_sdma_verbs_send(ppd, NULL, 0, tx);
8548c2ecf20Sopenharmony_ci	goto unaligned;
8558c2ecf20Sopenharmony_ci
8568c2ecf20Sopenharmony_cimap_err:
8578c2ecf20Sopenharmony_ci	kfree(phdr);
8588c2ecf20Sopenharmony_cierr_tx:
8598c2ecf20Sopenharmony_ci	qib_put_txreq(tx);
8608c2ecf20Sopenharmony_ci	ret = wait_kmem(dev, qp);
8618c2ecf20Sopenharmony_ciunaligned:
8628c2ecf20Sopenharmony_ci	ibp->rvp.n_unaligned++;
8638c2ecf20Sopenharmony_cibail:
8648c2ecf20Sopenharmony_ci	return ret;
8658c2ecf20Sopenharmony_cibail_tx:
8668c2ecf20Sopenharmony_ci	ret = PTR_ERR(tx);
8678c2ecf20Sopenharmony_ci	goto bail;
8688c2ecf20Sopenharmony_ci}
8698c2ecf20Sopenharmony_ci
8708c2ecf20Sopenharmony_ci/*
8718c2ecf20Sopenharmony_ci * If we are now in the error state, return zero to flush the
8728c2ecf20Sopenharmony_ci * send work request.
8738c2ecf20Sopenharmony_ci */
8748c2ecf20Sopenharmony_cistatic int no_bufs_available(struct rvt_qp *qp)
8758c2ecf20Sopenharmony_ci{
8768c2ecf20Sopenharmony_ci	struct qib_qp_priv *priv = qp->priv;
8778c2ecf20Sopenharmony_ci	struct qib_ibdev *dev = to_idev(qp->ibqp.device);
8788c2ecf20Sopenharmony_ci	struct qib_devdata *dd;
8798c2ecf20Sopenharmony_ci	unsigned long flags;
8808c2ecf20Sopenharmony_ci	int ret = 0;
8818c2ecf20Sopenharmony_ci
8828c2ecf20Sopenharmony_ci	/*
8838c2ecf20Sopenharmony_ci	 * Note that as soon as want_buffer() is called and
8848c2ecf20Sopenharmony_ci	 * possibly before it returns, qib_ib_piobufavail()
8858c2ecf20Sopenharmony_ci	 * could be called. Therefore, put QP on the I/O wait list before
8868c2ecf20Sopenharmony_ci	 * enabling the PIO avail interrupt.
8878c2ecf20Sopenharmony_ci	 */
8888c2ecf20Sopenharmony_ci	spin_lock_irqsave(&qp->s_lock, flags);
8898c2ecf20Sopenharmony_ci	if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
8908c2ecf20Sopenharmony_ci		spin_lock(&dev->rdi.pending_lock);
8918c2ecf20Sopenharmony_ci		if (list_empty(&priv->iowait)) {
8928c2ecf20Sopenharmony_ci			dev->n_piowait++;
8938c2ecf20Sopenharmony_ci			qp->s_flags |= RVT_S_WAIT_PIO;
8948c2ecf20Sopenharmony_ci			list_add_tail(&priv->iowait, &dev->piowait);
8958c2ecf20Sopenharmony_ci			dd = dd_from_dev(dev);
8968c2ecf20Sopenharmony_ci			dd->f_wantpiobuf_intr(dd, 1);
8978c2ecf20Sopenharmony_ci		}
8988c2ecf20Sopenharmony_ci		spin_unlock(&dev->rdi.pending_lock);
8998c2ecf20Sopenharmony_ci		qp->s_flags &= ~RVT_S_BUSY;
9008c2ecf20Sopenharmony_ci		ret = -EBUSY;
9018c2ecf20Sopenharmony_ci	}
9028c2ecf20Sopenharmony_ci	spin_unlock_irqrestore(&qp->s_lock, flags);
9038c2ecf20Sopenharmony_ci	return ret;
9048c2ecf20Sopenharmony_ci}
9058c2ecf20Sopenharmony_ci
9068c2ecf20Sopenharmony_cistatic int qib_verbs_send_pio(struct rvt_qp *qp, struct ib_header *ibhdr,
9078c2ecf20Sopenharmony_ci			      u32 hdrwords, struct rvt_sge_state *ss, u32 len,
9088c2ecf20Sopenharmony_ci			      u32 plen, u32 dwords)
9098c2ecf20Sopenharmony_ci{
9108c2ecf20Sopenharmony_ci	struct qib_devdata *dd = dd_from_ibdev(qp->ibqp.device);
9118c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = dd->pport + qp->port_num - 1;
9128c2ecf20Sopenharmony_ci	u32 *hdr = (u32 *) ibhdr;
9138c2ecf20Sopenharmony_ci	u32 __iomem *piobuf_orig;
9148c2ecf20Sopenharmony_ci	u32 __iomem *piobuf;
9158c2ecf20Sopenharmony_ci	u64 pbc;
9168c2ecf20Sopenharmony_ci	unsigned long flags;
9178c2ecf20Sopenharmony_ci	unsigned flush_wc;
9188c2ecf20Sopenharmony_ci	u32 control;
9198c2ecf20Sopenharmony_ci	u32 pbufn;
9208c2ecf20Sopenharmony_ci
9218c2ecf20Sopenharmony_ci	control = dd->f_setpbc_control(ppd, plen, qp->s_srate,
9228c2ecf20Sopenharmony_ci		be16_to_cpu(ibhdr->lrh[0]) >> 12);
9238c2ecf20Sopenharmony_ci	pbc = ((u64) control << 32) | plen;
9248c2ecf20Sopenharmony_ci	piobuf = dd->f_getsendbuf(ppd, pbc, &pbufn);
9258c2ecf20Sopenharmony_ci	if (unlikely(piobuf == NULL))
9268c2ecf20Sopenharmony_ci		return no_bufs_available(qp);
9278c2ecf20Sopenharmony_ci
9288c2ecf20Sopenharmony_ci	/*
9298c2ecf20Sopenharmony_ci	 * Write the pbc.
9308c2ecf20Sopenharmony_ci	 * We have to flush after the PBC for correctness on some cpus
9318c2ecf20Sopenharmony_ci	 * or WC buffer can be written out of order.
9328c2ecf20Sopenharmony_ci	 */
9338c2ecf20Sopenharmony_ci	writeq(pbc, piobuf);
9348c2ecf20Sopenharmony_ci	piobuf_orig = piobuf;
9358c2ecf20Sopenharmony_ci	piobuf += 2;
9368c2ecf20Sopenharmony_ci
9378c2ecf20Sopenharmony_ci	flush_wc = dd->flags & QIB_PIO_FLUSH_WC;
9388c2ecf20Sopenharmony_ci	if (len == 0) {
9398c2ecf20Sopenharmony_ci		/*
9408c2ecf20Sopenharmony_ci		 * If there is just the header portion, must flush before
9418c2ecf20Sopenharmony_ci		 * writing last word of header for correctness, and after
9428c2ecf20Sopenharmony_ci		 * the last header word (trigger word).
9438c2ecf20Sopenharmony_ci		 */
9448c2ecf20Sopenharmony_ci		if (flush_wc) {
9458c2ecf20Sopenharmony_ci			qib_flush_wc();
9468c2ecf20Sopenharmony_ci			qib_pio_copy(piobuf, hdr, hdrwords - 1);
9478c2ecf20Sopenharmony_ci			qib_flush_wc();
9488c2ecf20Sopenharmony_ci			__raw_writel(hdr[hdrwords - 1], piobuf + hdrwords - 1);
9498c2ecf20Sopenharmony_ci			qib_flush_wc();
9508c2ecf20Sopenharmony_ci		} else
9518c2ecf20Sopenharmony_ci			qib_pio_copy(piobuf, hdr, hdrwords);
9528c2ecf20Sopenharmony_ci		goto done;
9538c2ecf20Sopenharmony_ci	}
9548c2ecf20Sopenharmony_ci
9558c2ecf20Sopenharmony_ci	if (flush_wc)
9568c2ecf20Sopenharmony_ci		qib_flush_wc();
9578c2ecf20Sopenharmony_ci	qib_pio_copy(piobuf, hdr, hdrwords);
9588c2ecf20Sopenharmony_ci	piobuf += hdrwords;
9598c2ecf20Sopenharmony_ci
9608c2ecf20Sopenharmony_ci	/* The common case is aligned and contained in one segment. */
9618c2ecf20Sopenharmony_ci	if (likely(ss->num_sge == 1 && len <= ss->sge.length &&
9628c2ecf20Sopenharmony_ci		   !((unsigned long)ss->sge.vaddr & (sizeof(u32) - 1)))) {
9638c2ecf20Sopenharmony_ci		u32 *addr = (u32 *) ss->sge.vaddr;
9648c2ecf20Sopenharmony_ci
9658c2ecf20Sopenharmony_ci		/* Update address before sending packet. */
9668c2ecf20Sopenharmony_ci		rvt_update_sge(ss, len, false);
9678c2ecf20Sopenharmony_ci		if (flush_wc) {
9688c2ecf20Sopenharmony_ci			qib_pio_copy(piobuf, addr, dwords - 1);
9698c2ecf20Sopenharmony_ci			/* must flush early everything before trigger word */
9708c2ecf20Sopenharmony_ci			qib_flush_wc();
9718c2ecf20Sopenharmony_ci			__raw_writel(addr[dwords - 1], piobuf + dwords - 1);
9728c2ecf20Sopenharmony_ci			/* be sure trigger word is written */
9738c2ecf20Sopenharmony_ci			qib_flush_wc();
9748c2ecf20Sopenharmony_ci		} else
9758c2ecf20Sopenharmony_ci			qib_pio_copy(piobuf, addr, dwords);
9768c2ecf20Sopenharmony_ci		goto done;
9778c2ecf20Sopenharmony_ci	}
9788c2ecf20Sopenharmony_ci	copy_io(piobuf, ss, len, flush_wc);
9798c2ecf20Sopenharmony_cidone:
9808c2ecf20Sopenharmony_ci	if (dd->flags & QIB_USE_SPCL_TRIG) {
9818c2ecf20Sopenharmony_ci		u32 spcl_off = (pbufn >= dd->piobcnt2k) ? 2047 : 1023;
9828c2ecf20Sopenharmony_ci
9838c2ecf20Sopenharmony_ci		qib_flush_wc();
9848c2ecf20Sopenharmony_ci		__raw_writel(0xaebecede, piobuf_orig + spcl_off);
9858c2ecf20Sopenharmony_ci	}
9868c2ecf20Sopenharmony_ci	qib_sendbuf_done(dd, pbufn);
9878c2ecf20Sopenharmony_ci	if (qp->s_rdma_mr) {
9888c2ecf20Sopenharmony_ci		rvt_put_mr(qp->s_rdma_mr);
9898c2ecf20Sopenharmony_ci		qp->s_rdma_mr = NULL;
9908c2ecf20Sopenharmony_ci	}
9918c2ecf20Sopenharmony_ci	if (qp->s_wqe) {
9928c2ecf20Sopenharmony_ci		spin_lock_irqsave(&qp->s_lock, flags);
9938c2ecf20Sopenharmony_ci		rvt_send_complete(qp, qp->s_wqe, IB_WC_SUCCESS);
9948c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&qp->s_lock, flags);
9958c2ecf20Sopenharmony_ci	} else if (qp->ibqp.qp_type == IB_QPT_RC) {
9968c2ecf20Sopenharmony_ci		spin_lock_irqsave(&qp->s_lock, flags);
9978c2ecf20Sopenharmony_ci		qib_rc_send_complete(qp, ibhdr);
9988c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&qp->s_lock, flags);
9998c2ecf20Sopenharmony_ci	}
10008c2ecf20Sopenharmony_ci	return 0;
10018c2ecf20Sopenharmony_ci}
10028c2ecf20Sopenharmony_ci
10038c2ecf20Sopenharmony_ci/**
10048c2ecf20Sopenharmony_ci * qib_verbs_send - send a packet
10058c2ecf20Sopenharmony_ci * @qp: the QP to send on
10068c2ecf20Sopenharmony_ci * @hdr: the packet header
10078c2ecf20Sopenharmony_ci * @hdrwords: the number of 32-bit words in the header
10088c2ecf20Sopenharmony_ci * @ss: the SGE to send
10098c2ecf20Sopenharmony_ci * @len: the length of the packet in bytes
10108c2ecf20Sopenharmony_ci *
10118c2ecf20Sopenharmony_ci * Return zero if packet is sent or queued OK.
10128c2ecf20Sopenharmony_ci * Return non-zero and clear qp->s_flags RVT_S_BUSY otherwise.
10138c2ecf20Sopenharmony_ci */
10148c2ecf20Sopenharmony_ciint qib_verbs_send(struct rvt_qp *qp, struct ib_header *hdr,
10158c2ecf20Sopenharmony_ci		   u32 hdrwords, struct rvt_sge_state *ss, u32 len)
10168c2ecf20Sopenharmony_ci{
10178c2ecf20Sopenharmony_ci	struct qib_devdata *dd = dd_from_ibdev(qp->ibqp.device);
10188c2ecf20Sopenharmony_ci	u32 plen;
10198c2ecf20Sopenharmony_ci	int ret;
10208c2ecf20Sopenharmony_ci	u32 dwords = (len + 3) >> 2;
10218c2ecf20Sopenharmony_ci
10228c2ecf20Sopenharmony_ci	/*
10238c2ecf20Sopenharmony_ci	 * Calculate the send buffer trigger address.
10248c2ecf20Sopenharmony_ci	 * The +1 counts for the pbc control dword following the pbc length.
10258c2ecf20Sopenharmony_ci	 */
10268c2ecf20Sopenharmony_ci	plen = hdrwords + dwords + 1;
10278c2ecf20Sopenharmony_ci
10288c2ecf20Sopenharmony_ci	/*
10298c2ecf20Sopenharmony_ci	 * VL15 packets (IB_QPT_SMI) will always use PIO, so we
10308c2ecf20Sopenharmony_ci	 * can defer SDMA restart until link goes ACTIVE without
10318c2ecf20Sopenharmony_ci	 * worrying about just how we got there.
10328c2ecf20Sopenharmony_ci	 */
10338c2ecf20Sopenharmony_ci	if (qp->ibqp.qp_type == IB_QPT_SMI ||
10348c2ecf20Sopenharmony_ci	    !(dd->flags & QIB_HAS_SEND_DMA))
10358c2ecf20Sopenharmony_ci		ret = qib_verbs_send_pio(qp, hdr, hdrwords, ss, len,
10368c2ecf20Sopenharmony_ci					 plen, dwords);
10378c2ecf20Sopenharmony_ci	else
10388c2ecf20Sopenharmony_ci		ret = qib_verbs_send_dma(qp, hdr, hdrwords, ss, len,
10398c2ecf20Sopenharmony_ci					 plen, dwords);
10408c2ecf20Sopenharmony_ci
10418c2ecf20Sopenharmony_ci	return ret;
10428c2ecf20Sopenharmony_ci}
10438c2ecf20Sopenharmony_ci
10448c2ecf20Sopenharmony_ciint qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords,
10458c2ecf20Sopenharmony_ci			  u64 *rwords, u64 *spkts, u64 *rpkts,
10468c2ecf20Sopenharmony_ci			  u64 *xmit_wait)
10478c2ecf20Sopenharmony_ci{
10488c2ecf20Sopenharmony_ci	int ret;
10498c2ecf20Sopenharmony_ci	struct qib_devdata *dd = ppd->dd;
10508c2ecf20Sopenharmony_ci
10518c2ecf20Sopenharmony_ci	if (!(dd->flags & QIB_PRESENT)) {
10528c2ecf20Sopenharmony_ci		/* no hardware, freeze, etc. */
10538c2ecf20Sopenharmony_ci		ret = -EINVAL;
10548c2ecf20Sopenharmony_ci		goto bail;
10558c2ecf20Sopenharmony_ci	}
10568c2ecf20Sopenharmony_ci	*swords = dd->f_portcntr(ppd, QIBPORTCNTR_WORDSEND);
10578c2ecf20Sopenharmony_ci	*rwords = dd->f_portcntr(ppd, QIBPORTCNTR_WORDRCV);
10588c2ecf20Sopenharmony_ci	*spkts = dd->f_portcntr(ppd, QIBPORTCNTR_PKTSEND);
10598c2ecf20Sopenharmony_ci	*rpkts = dd->f_portcntr(ppd, QIBPORTCNTR_PKTRCV);
10608c2ecf20Sopenharmony_ci	*xmit_wait = dd->f_portcntr(ppd, QIBPORTCNTR_SENDSTALL);
10618c2ecf20Sopenharmony_ci
10628c2ecf20Sopenharmony_ci	ret = 0;
10638c2ecf20Sopenharmony_ci
10648c2ecf20Sopenharmony_cibail:
10658c2ecf20Sopenharmony_ci	return ret;
10668c2ecf20Sopenharmony_ci}
10678c2ecf20Sopenharmony_ci
10688c2ecf20Sopenharmony_ci/**
10698c2ecf20Sopenharmony_ci * qib_get_counters - get various chip counters
10708c2ecf20Sopenharmony_ci * @dd: the qlogic_ib device
10718c2ecf20Sopenharmony_ci * @cntrs: counters are placed here
10728c2ecf20Sopenharmony_ci *
10738c2ecf20Sopenharmony_ci * Return the counters needed by recv_pma_get_portcounters().
10748c2ecf20Sopenharmony_ci */
10758c2ecf20Sopenharmony_ciint qib_get_counters(struct qib_pportdata *ppd,
10768c2ecf20Sopenharmony_ci		     struct qib_verbs_counters *cntrs)
10778c2ecf20Sopenharmony_ci{
10788c2ecf20Sopenharmony_ci	int ret;
10798c2ecf20Sopenharmony_ci
10808c2ecf20Sopenharmony_ci	if (!(ppd->dd->flags & QIB_PRESENT)) {
10818c2ecf20Sopenharmony_ci		/* no hardware, freeze, etc. */
10828c2ecf20Sopenharmony_ci		ret = -EINVAL;
10838c2ecf20Sopenharmony_ci		goto bail;
10848c2ecf20Sopenharmony_ci	}
10858c2ecf20Sopenharmony_ci	cntrs->symbol_error_counter =
10868c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBSYMBOLERR);
10878c2ecf20Sopenharmony_ci	cntrs->link_error_recovery_counter =
10888c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBLINKERRRECOV);
10898c2ecf20Sopenharmony_ci	/*
10908c2ecf20Sopenharmony_ci	 * The link downed counter counts when the other side downs the
10918c2ecf20Sopenharmony_ci	 * connection.  We add in the number of times we downed the link
10928c2ecf20Sopenharmony_ci	 * due to local link integrity errors to compensate.
10938c2ecf20Sopenharmony_ci	 */
10948c2ecf20Sopenharmony_ci	cntrs->link_downed_counter =
10958c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBLINKDOWN);
10968c2ecf20Sopenharmony_ci	cntrs->port_rcv_errors =
10978c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXDROPPKT) +
10988c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RCVOVFL) +
10998c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERR_RLEN) +
11008c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_INVALIDRLEN) +
11018c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRLINK) +
11028c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRICRC) +
11038c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRVCRC) +
11048c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRLPCRC) +
11058c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_BADFORMAT);
11068c2ecf20Sopenharmony_ci	cntrs->port_rcv_errors +=
11078c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXLOCALPHYERR);
11088c2ecf20Sopenharmony_ci	cntrs->port_rcv_errors +=
11098c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXVLERR);
11108c2ecf20Sopenharmony_ci	cntrs->port_rcv_remphys_errors =
11118c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RCVEBP);
11128c2ecf20Sopenharmony_ci	cntrs->port_xmit_discards =
11138c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_UNSUPVL);
11148c2ecf20Sopenharmony_ci	cntrs->port_xmit_data = ppd->dd->f_portcntr(ppd,
11158c2ecf20Sopenharmony_ci			QIBPORTCNTR_WORDSEND);
11168c2ecf20Sopenharmony_ci	cntrs->port_rcv_data = ppd->dd->f_portcntr(ppd,
11178c2ecf20Sopenharmony_ci			QIBPORTCNTR_WORDRCV);
11188c2ecf20Sopenharmony_ci	cntrs->port_xmit_packets = ppd->dd->f_portcntr(ppd,
11198c2ecf20Sopenharmony_ci			QIBPORTCNTR_PKTSEND);
11208c2ecf20Sopenharmony_ci	cntrs->port_rcv_packets = ppd->dd->f_portcntr(ppd,
11218c2ecf20Sopenharmony_ci			QIBPORTCNTR_PKTRCV);
11228c2ecf20Sopenharmony_ci	cntrs->local_link_integrity_errors =
11238c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_LLI);
11248c2ecf20Sopenharmony_ci	cntrs->excessive_buffer_overrun_errors =
11258c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_EXCESSBUFOVFL);
11268c2ecf20Sopenharmony_ci	cntrs->vl15_dropped =
11278c2ecf20Sopenharmony_ci		ppd->dd->f_portcntr(ppd, QIBPORTCNTR_VL15PKTDROP);
11288c2ecf20Sopenharmony_ci
11298c2ecf20Sopenharmony_ci	ret = 0;
11308c2ecf20Sopenharmony_ci
11318c2ecf20Sopenharmony_cibail:
11328c2ecf20Sopenharmony_ci	return ret;
11338c2ecf20Sopenharmony_ci}
11348c2ecf20Sopenharmony_ci
11358c2ecf20Sopenharmony_ci/**
11368c2ecf20Sopenharmony_ci * qib_ib_piobufavail - callback when a PIO buffer is available
11378c2ecf20Sopenharmony_ci * @dd: the device pointer
11388c2ecf20Sopenharmony_ci *
11398c2ecf20Sopenharmony_ci * This is called from qib_intr() at interrupt level when a PIO buffer is
11408c2ecf20Sopenharmony_ci * available after qib_verbs_send() returned an error that no buffers were
11418c2ecf20Sopenharmony_ci * available. Disable the interrupt if there are no more QPs waiting.
11428c2ecf20Sopenharmony_ci */
11438c2ecf20Sopenharmony_civoid qib_ib_piobufavail(struct qib_devdata *dd)
11448c2ecf20Sopenharmony_ci{
11458c2ecf20Sopenharmony_ci	struct qib_ibdev *dev = &dd->verbs_dev;
11468c2ecf20Sopenharmony_ci	struct list_head *list;
11478c2ecf20Sopenharmony_ci	struct rvt_qp *qps[5];
11488c2ecf20Sopenharmony_ci	struct rvt_qp *qp;
11498c2ecf20Sopenharmony_ci	unsigned long flags;
11508c2ecf20Sopenharmony_ci	unsigned i, n;
11518c2ecf20Sopenharmony_ci	struct qib_qp_priv *priv;
11528c2ecf20Sopenharmony_ci
11538c2ecf20Sopenharmony_ci	list = &dev->piowait;
11548c2ecf20Sopenharmony_ci	n = 0;
11558c2ecf20Sopenharmony_ci
11568c2ecf20Sopenharmony_ci	/*
11578c2ecf20Sopenharmony_ci	 * Note: checking that the piowait list is empty and clearing
11588c2ecf20Sopenharmony_ci	 * the buffer available interrupt needs to be atomic or we
11598c2ecf20Sopenharmony_ci	 * could end up with QPs on the wait list with the interrupt
11608c2ecf20Sopenharmony_ci	 * disabled.
11618c2ecf20Sopenharmony_ci	 */
11628c2ecf20Sopenharmony_ci	spin_lock_irqsave(&dev->rdi.pending_lock, flags);
11638c2ecf20Sopenharmony_ci	while (!list_empty(list)) {
11648c2ecf20Sopenharmony_ci		if (n == ARRAY_SIZE(qps))
11658c2ecf20Sopenharmony_ci			goto full;
11668c2ecf20Sopenharmony_ci		priv = list_entry(list->next, struct qib_qp_priv, iowait);
11678c2ecf20Sopenharmony_ci		qp = priv->owner;
11688c2ecf20Sopenharmony_ci		list_del_init(&priv->iowait);
11698c2ecf20Sopenharmony_ci		rvt_get_qp(qp);
11708c2ecf20Sopenharmony_ci		qps[n++] = qp;
11718c2ecf20Sopenharmony_ci	}
11728c2ecf20Sopenharmony_ci	dd->f_wantpiobuf_intr(dd, 0);
11738c2ecf20Sopenharmony_cifull:
11748c2ecf20Sopenharmony_ci	spin_unlock_irqrestore(&dev->rdi.pending_lock, flags);
11758c2ecf20Sopenharmony_ci
11768c2ecf20Sopenharmony_ci	for (i = 0; i < n; i++) {
11778c2ecf20Sopenharmony_ci		qp = qps[i];
11788c2ecf20Sopenharmony_ci
11798c2ecf20Sopenharmony_ci		spin_lock_irqsave(&qp->s_lock, flags);
11808c2ecf20Sopenharmony_ci		if (qp->s_flags & RVT_S_WAIT_PIO) {
11818c2ecf20Sopenharmony_ci			qp->s_flags &= ~RVT_S_WAIT_PIO;
11828c2ecf20Sopenharmony_ci			qib_schedule_send(qp);
11838c2ecf20Sopenharmony_ci		}
11848c2ecf20Sopenharmony_ci		spin_unlock_irqrestore(&qp->s_lock, flags);
11858c2ecf20Sopenharmony_ci
11868c2ecf20Sopenharmony_ci		/* Notify qib_destroy_qp() if it is waiting. */
11878c2ecf20Sopenharmony_ci		rvt_put_qp(qp);
11888c2ecf20Sopenharmony_ci	}
11898c2ecf20Sopenharmony_ci}
11908c2ecf20Sopenharmony_ci
11918c2ecf20Sopenharmony_cistatic int qib_query_port(struct rvt_dev_info *rdi, u8 port_num,
11928c2ecf20Sopenharmony_ci			  struct ib_port_attr *props)
11938c2ecf20Sopenharmony_ci{
11948c2ecf20Sopenharmony_ci	struct qib_ibdev *ibdev = container_of(rdi, struct qib_ibdev, rdi);
11958c2ecf20Sopenharmony_ci	struct qib_devdata *dd = dd_from_dev(ibdev);
11968c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = &dd->pport[port_num - 1];
11978c2ecf20Sopenharmony_ci	enum ib_mtu mtu;
11988c2ecf20Sopenharmony_ci	u16 lid = ppd->lid;
11998c2ecf20Sopenharmony_ci
12008c2ecf20Sopenharmony_ci	/* props being zeroed by the caller, avoid zeroing it here */
12018c2ecf20Sopenharmony_ci	props->lid = lid ? lid : be16_to_cpu(IB_LID_PERMISSIVE);
12028c2ecf20Sopenharmony_ci	props->lmc = ppd->lmc;
12038c2ecf20Sopenharmony_ci	props->state = dd->f_iblink_state(ppd->lastibcstat);
12048c2ecf20Sopenharmony_ci	props->phys_state = dd->f_ibphys_portstate(ppd->lastibcstat);
12058c2ecf20Sopenharmony_ci	props->gid_tbl_len = QIB_GUIDS_PER_PORT;
12068c2ecf20Sopenharmony_ci	props->active_width = ppd->link_width_active;
12078c2ecf20Sopenharmony_ci	/* See rate_show() */
12088c2ecf20Sopenharmony_ci	props->active_speed = ppd->link_speed_active;
12098c2ecf20Sopenharmony_ci	props->max_vl_num = qib_num_vls(ppd->vls_supported);
12108c2ecf20Sopenharmony_ci
12118c2ecf20Sopenharmony_ci	props->max_mtu = qib_ibmtu ? qib_ibmtu : IB_MTU_4096;
12128c2ecf20Sopenharmony_ci	switch (ppd->ibmtu) {
12138c2ecf20Sopenharmony_ci	case 4096:
12148c2ecf20Sopenharmony_ci		mtu = IB_MTU_4096;
12158c2ecf20Sopenharmony_ci		break;
12168c2ecf20Sopenharmony_ci	case 2048:
12178c2ecf20Sopenharmony_ci		mtu = IB_MTU_2048;
12188c2ecf20Sopenharmony_ci		break;
12198c2ecf20Sopenharmony_ci	case 1024:
12208c2ecf20Sopenharmony_ci		mtu = IB_MTU_1024;
12218c2ecf20Sopenharmony_ci		break;
12228c2ecf20Sopenharmony_ci	case 512:
12238c2ecf20Sopenharmony_ci		mtu = IB_MTU_512;
12248c2ecf20Sopenharmony_ci		break;
12258c2ecf20Sopenharmony_ci	case 256:
12268c2ecf20Sopenharmony_ci		mtu = IB_MTU_256;
12278c2ecf20Sopenharmony_ci		break;
12288c2ecf20Sopenharmony_ci	default:
12298c2ecf20Sopenharmony_ci		mtu = IB_MTU_2048;
12308c2ecf20Sopenharmony_ci	}
12318c2ecf20Sopenharmony_ci	props->active_mtu = mtu;
12328c2ecf20Sopenharmony_ci
12338c2ecf20Sopenharmony_ci	return 0;
12348c2ecf20Sopenharmony_ci}
12358c2ecf20Sopenharmony_ci
12368c2ecf20Sopenharmony_cistatic int qib_modify_device(struct ib_device *device,
12378c2ecf20Sopenharmony_ci			     int device_modify_mask,
12388c2ecf20Sopenharmony_ci			     struct ib_device_modify *device_modify)
12398c2ecf20Sopenharmony_ci{
12408c2ecf20Sopenharmony_ci	struct qib_devdata *dd = dd_from_ibdev(device);
12418c2ecf20Sopenharmony_ci	unsigned i;
12428c2ecf20Sopenharmony_ci	int ret;
12438c2ecf20Sopenharmony_ci
12448c2ecf20Sopenharmony_ci	if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
12458c2ecf20Sopenharmony_ci				   IB_DEVICE_MODIFY_NODE_DESC)) {
12468c2ecf20Sopenharmony_ci		ret = -EOPNOTSUPP;
12478c2ecf20Sopenharmony_ci		goto bail;
12488c2ecf20Sopenharmony_ci	}
12498c2ecf20Sopenharmony_ci
12508c2ecf20Sopenharmony_ci	if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) {
12518c2ecf20Sopenharmony_ci		memcpy(device->node_desc, device_modify->node_desc,
12528c2ecf20Sopenharmony_ci		       IB_DEVICE_NODE_DESC_MAX);
12538c2ecf20Sopenharmony_ci		for (i = 0; i < dd->num_pports; i++) {
12548c2ecf20Sopenharmony_ci			struct qib_ibport *ibp = &dd->pport[i].ibport_data;
12558c2ecf20Sopenharmony_ci
12568c2ecf20Sopenharmony_ci			qib_node_desc_chg(ibp);
12578c2ecf20Sopenharmony_ci		}
12588c2ecf20Sopenharmony_ci	}
12598c2ecf20Sopenharmony_ci
12608c2ecf20Sopenharmony_ci	if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
12618c2ecf20Sopenharmony_ci		ib_qib_sys_image_guid =
12628c2ecf20Sopenharmony_ci			cpu_to_be64(device_modify->sys_image_guid);
12638c2ecf20Sopenharmony_ci		for (i = 0; i < dd->num_pports; i++) {
12648c2ecf20Sopenharmony_ci			struct qib_ibport *ibp = &dd->pport[i].ibport_data;
12658c2ecf20Sopenharmony_ci
12668c2ecf20Sopenharmony_ci			qib_sys_guid_chg(ibp);
12678c2ecf20Sopenharmony_ci		}
12688c2ecf20Sopenharmony_ci	}
12698c2ecf20Sopenharmony_ci
12708c2ecf20Sopenharmony_ci	ret = 0;
12718c2ecf20Sopenharmony_ci
12728c2ecf20Sopenharmony_cibail:
12738c2ecf20Sopenharmony_ci	return ret;
12748c2ecf20Sopenharmony_ci}
12758c2ecf20Sopenharmony_ci
12768c2ecf20Sopenharmony_cistatic int qib_shut_down_port(struct rvt_dev_info *rdi, u8 port_num)
12778c2ecf20Sopenharmony_ci{
12788c2ecf20Sopenharmony_ci	struct qib_ibdev *ibdev = container_of(rdi, struct qib_ibdev, rdi);
12798c2ecf20Sopenharmony_ci	struct qib_devdata *dd = dd_from_dev(ibdev);
12808c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = &dd->pport[port_num - 1];
12818c2ecf20Sopenharmony_ci
12828c2ecf20Sopenharmony_ci	qib_set_linkstate(ppd, QIB_IB_LINKDOWN);
12838c2ecf20Sopenharmony_ci
12848c2ecf20Sopenharmony_ci	return 0;
12858c2ecf20Sopenharmony_ci}
12868c2ecf20Sopenharmony_ci
12878c2ecf20Sopenharmony_cistatic int qib_get_guid_be(struct rvt_dev_info *rdi, struct rvt_ibport *rvp,
12888c2ecf20Sopenharmony_ci			   int guid_index, __be64 *guid)
12898c2ecf20Sopenharmony_ci{
12908c2ecf20Sopenharmony_ci	struct qib_ibport *ibp = container_of(rvp, struct qib_ibport, rvp);
12918c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = ppd_from_ibp(ibp);
12928c2ecf20Sopenharmony_ci
12938c2ecf20Sopenharmony_ci	if (guid_index == 0)
12948c2ecf20Sopenharmony_ci		*guid = ppd->guid;
12958c2ecf20Sopenharmony_ci	else if (guid_index < QIB_GUIDS_PER_PORT)
12968c2ecf20Sopenharmony_ci		*guid = ibp->guids[guid_index - 1];
12978c2ecf20Sopenharmony_ci	else
12988c2ecf20Sopenharmony_ci		return -EINVAL;
12998c2ecf20Sopenharmony_ci
13008c2ecf20Sopenharmony_ci	return 0;
13018c2ecf20Sopenharmony_ci}
13028c2ecf20Sopenharmony_ci
13038c2ecf20Sopenharmony_ciint qib_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr)
13048c2ecf20Sopenharmony_ci{
13058c2ecf20Sopenharmony_ci	if (rdma_ah_get_sl(ah_attr) > 15)
13068c2ecf20Sopenharmony_ci		return -EINVAL;
13078c2ecf20Sopenharmony_ci
13088c2ecf20Sopenharmony_ci	if (rdma_ah_get_dlid(ah_attr) == 0)
13098c2ecf20Sopenharmony_ci		return -EINVAL;
13108c2ecf20Sopenharmony_ci	if (rdma_ah_get_dlid(ah_attr) >=
13118c2ecf20Sopenharmony_ci		be16_to_cpu(IB_MULTICAST_LID_BASE) &&
13128c2ecf20Sopenharmony_ci	    rdma_ah_get_dlid(ah_attr) !=
13138c2ecf20Sopenharmony_ci		be16_to_cpu(IB_LID_PERMISSIVE) &&
13148c2ecf20Sopenharmony_ci	    !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
13158c2ecf20Sopenharmony_ci		return -EINVAL;
13168c2ecf20Sopenharmony_ci
13178c2ecf20Sopenharmony_ci	return 0;
13188c2ecf20Sopenharmony_ci}
13198c2ecf20Sopenharmony_ci
13208c2ecf20Sopenharmony_cistatic void qib_notify_new_ah(struct ib_device *ibdev,
13218c2ecf20Sopenharmony_ci			      struct rdma_ah_attr *ah_attr,
13228c2ecf20Sopenharmony_ci			      struct rvt_ah *ah)
13238c2ecf20Sopenharmony_ci{
13248c2ecf20Sopenharmony_ci	struct qib_ibport *ibp;
13258c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd;
13268c2ecf20Sopenharmony_ci
13278c2ecf20Sopenharmony_ci	/*
13288c2ecf20Sopenharmony_ci	 * Do not trust reading anything from rvt_ah at this point as it is not
13298c2ecf20Sopenharmony_ci	 * done being setup. We can however modify things which we need to set.
13308c2ecf20Sopenharmony_ci	 */
13318c2ecf20Sopenharmony_ci
13328c2ecf20Sopenharmony_ci	ibp = to_iport(ibdev, rdma_ah_get_port_num(ah_attr));
13338c2ecf20Sopenharmony_ci	ppd = ppd_from_ibp(ibp);
13348c2ecf20Sopenharmony_ci	ah->vl = ibp->sl_to_vl[rdma_ah_get_sl(&ah->attr)];
13358c2ecf20Sopenharmony_ci	ah->log_pmtu = ilog2(ppd->ibmtu);
13368c2ecf20Sopenharmony_ci}
13378c2ecf20Sopenharmony_ci
13388c2ecf20Sopenharmony_cistruct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid)
13398c2ecf20Sopenharmony_ci{
13408c2ecf20Sopenharmony_ci	struct rdma_ah_attr attr;
13418c2ecf20Sopenharmony_ci	struct ib_ah *ah = ERR_PTR(-EINVAL);
13428c2ecf20Sopenharmony_ci	struct rvt_qp *qp0;
13438c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = ppd_from_ibp(ibp);
13448c2ecf20Sopenharmony_ci	struct qib_devdata *dd = dd_from_ppd(ppd);
13458c2ecf20Sopenharmony_ci	u8 port_num = ppd->port;
13468c2ecf20Sopenharmony_ci
13478c2ecf20Sopenharmony_ci	memset(&attr, 0, sizeof(attr));
13488c2ecf20Sopenharmony_ci	attr.type = rdma_ah_find_type(&dd->verbs_dev.rdi.ibdev, port_num);
13498c2ecf20Sopenharmony_ci	rdma_ah_set_dlid(&attr, dlid);
13508c2ecf20Sopenharmony_ci	rdma_ah_set_port_num(&attr, port_num);
13518c2ecf20Sopenharmony_ci	rcu_read_lock();
13528c2ecf20Sopenharmony_ci	qp0 = rcu_dereference(ibp->rvp.qp[0]);
13538c2ecf20Sopenharmony_ci	if (qp0)
13548c2ecf20Sopenharmony_ci		ah = rdma_create_ah(qp0->ibqp.pd, &attr, 0);
13558c2ecf20Sopenharmony_ci	rcu_read_unlock();
13568c2ecf20Sopenharmony_ci	return ah;
13578c2ecf20Sopenharmony_ci}
13588c2ecf20Sopenharmony_ci
13598c2ecf20Sopenharmony_ci/**
13608c2ecf20Sopenharmony_ci * qib_get_npkeys - return the size of the PKEY table for context 0
13618c2ecf20Sopenharmony_ci * @dd: the qlogic_ib device
13628c2ecf20Sopenharmony_ci */
13638c2ecf20Sopenharmony_ciunsigned qib_get_npkeys(struct qib_devdata *dd)
13648c2ecf20Sopenharmony_ci{
13658c2ecf20Sopenharmony_ci	return ARRAY_SIZE(dd->rcd[0]->pkeys);
13668c2ecf20Sopenharmony_ci}
13678c2ecf20Sopenharmony_ci
13688c2ecf20Sopenharmony_ci/*
13698c2ecf20Sopenharmony_ci * Return the indexed PKEY from the port PKEY table.
13708c2ecf20Sopenharmony_ci * No need to validate rcd[ctxt]; the port is setup if we are here.
13718c2ecf20Sopenharmony_ci */
13728c2ecf20Sopenharmony_ciunsigned qib_get_pkey(struct qib_ibport *ibp, unsigned index)
13738c2ecf20Sopenharmony_ci{
13748c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = ppd_from_ibp(ibp);
13758c2ecf20Sopenharmony_ci	struct qib_devdata *dd = ppd->dd;
13768c2ecf20Sopenharmony_ci	unsigned ctxt = ppd->hw_pidx;
13778c2ecf20Sopenharmony_ci	unsigned ret;
13788c2ecf20Sopenharmony_ci
13798c2ecf20Sopenharmony_ci	/* dd->rcd null if mini_init or some init failures */
13808c2ecf20Sopenharmony_ci	if (!dd->rcd || index >= ARRAY_SIZE(dd->rcd[ctxt]->pkeys))
13818c2ecf20Sopenharmony_ci		ret = 0;
13828c2ecf20Sopenharmony_ci	else
13838c2ecf20Sopenharmony_ci		ret = dd->rcd[ctxt]->pkeys[index];
13848c2ecf20Sopenharmony_ci
13858c2ecf20Sopenharmony_ci	return ret;
13868c2ecf20Sopenharmony_ci}
13878c2ecf20Sopenharmony_ci
13888c2ecf20Sopenharmony_cistatic void init_ibport(struct qib_pportdata *ppd)
13898c2ecf20Sopenharmony_ci{
13908c2ecf20Sopenharmony_ci	struct qib_verbs_counters cntrs;
13918c2ecf20Sopenharmony_ci	struct qib_ibport *ibp = &ppd->ibport_data;
13928c2ecf20Sopenharmony_ci
13938c2ecf20Sopenharmony_ci	spin_lock_init(&ibp->rvp.lock);
13948c2ecf20Sopenharmony_ci	/* Set the prefix to the default value (see ch. 4.1.1) */
13958c2ecf20Sopenharmony_ci	ibp->rvp.gid_prefix = IB_DEFAULT_GID_PREFIX;
13968c2ecf20Sopenharmony_ci	ibp->rvp.sm_lid = be16_to_cpu(IB_LID_PERMISSIVE);
13978c2ecf20Sopenharmony_ci	ibp->rvp.port_cap_flags = IB_PORT_SYS_IMAGE_GUID_SUP |
13988c2ecf20Sopenharmony_ci		IB_PORT_CLIENT_REG_SUP | IB_PORT_SL_MAP_SUP |
13998c2ecf20Sopenharmony_ci		IB_PORT_TRAP_SUP | IB_PORT_AUTO_MIGR_SUP |
14008c2ecf20Sopenharmony_ci		IB_PORT_DR_NOTICE_SUP | IB_PORT_CAP_MASK_NOTICE_SUP |
14018c2ecf20Sopenharmony_ci		IB_PORT_OTHER_LOCAL_CHANGES_SUP;
14028c2ecf20Sopenharmony_ci	if (ppd->dd->flags & QIB_HAS_LINK_LATENCY)
14038c2ecf20Sopenharmony_ci		ibp->rvp.port_cap_flags |= IB_PORT_LINK_LATENCY_SUP;
14048c2ecf20Sopenharmony_ci	ibp->rvp.pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
14058c2ecf20Sopenharmony_ci	ibp->rvp.pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
14068c2ecf20Sopenharmony_ci	ibp->rvp.pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
14078c2ecf20Sopenharmony_ci	ibp->rvp.pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
14088c2ecf20Sopenharmony_ci	ibp->rvp.pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;
14098c2ecf20Sopenharmony_ci
14108c2ecf20Sopenharmony_ci	/* Snapshot current HW counters to "clear" them. */
14118c2ecf20Sopenharmony_ci	qib_get_counters(ppd, &cntrs);
14128c2ecf20Sopenharmony_ci	ibp->z_symbol_error_counter = cntrs.symbol_error_counter;
14138c2ecf20Sopenharmony_ci	ibp->z_link_error_recovery_counter =
14148c2ecf20Sopenharmony_ci		cntrs.link_error_recovery_counter;
14158c2ecf20Sopenharmony_ci	ibp->z_link_downed_counter = cntrs.link_downed_counter;
14168c2ecf20Sopenharmony_ci	ibp->z_port_rcv_errors = cntrs.port_rcv_errors;
14178c2ecf20Sopenharmony_ci	ibp->z_port_rcv_remphys_errors = cntrs.port_rcv_remphys_errors;
14188c2ecf20Sopenharmony_ci	ibp->z_port_xmit_discards = cntrs.port_xmit_discards;
14198c2ecf20Sopenharmony_ci	ibp->z_port_xmit_data = cntrs.port_xmit_data;
14208c2ecf20Sopenharmony_ci	ibp->z_port_rcv_data = cntrs.port_rcv_data;
14218c2ecf20Sopenharmony_ci	ibp->z_port_xmit_packets = cntrs.port_xmit_packets;
14228c2ecf20Sopenharmony_ci	ibp->z_port_rcv_packets = cntrs.port_rcv_packets;
14238c2ecf20Sopenharmony_ci	ibp->z_local_link_integrity_errors =
14248c2ecf20Sopenharmony_ci		cntrs.local_link_integrity_errors;
14258c2ecf20Sopenharmony_ci	ibp->z_excessive_buffer_overrun_errors =
14268c2ecf20Sopenharmony_ci		cntrs.excessive_buffer_overrun_errors;
14278c2ecf20Sopenharmony_ci	ibp->z_vl15_dropped = cntrs.vl15_dropped;
14288c2ecf20Sopenharmony_ci	RCU_INIT_POINTER(ibp->rvp.qp[0], NULL);
14298c2ecf20Sopenharmony_ci	RCU_INIT_POINTER(ibp->rvp.qp[1], NULL);
14308c2ecf20Sopenharmony_ci}
14318c2ecf20Sopenharmony_ci
14328c2ecf20Sopenharmony_ci/**
14338c2ecf20Sopenharmony_ci * qib_fill_device_attr - Fill in rvt dev info device attributes.
14348c2ecf20Sopenharmony_ci * @dd: the device data structure
14358c2ecf20Sopenharmony_ci */
14368c2ecf20Sopenharmony_cistatic void qib_fill_device_attr(struct qib_devdata *dd)
14378c2ecf20Sopenharmony_ci{
14388c2ecf20Sopenharmony_ci	struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
14398c2ecf20Sopenharmony_ci
14408c2ecf20Sopenharmony_ci	memset(&rdi->dparms.props, 0, sizeof(rdi->dparms.props));
14418c2ecf20Sopenharmony_ci
14428c2ecf20Sopenharmony_ci	rdi->dparms.props.max_pd = ib_qib_max_pds;
14438c2ecf20Sopenharmony_ci	rdi->dparms.props.max_ah = ib_qib_max_ahs;
14448c2ecf20Sopenharmony_ci	rdi->dparms.props.device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
14458c2ecf20Sopenharmony_ci		IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
14468c2ecf20Sopenharmony_ci		IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN |
14478c2ecf20Sopenharmony_ci		IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE;
14488c2ecf20Sopenharmony_ci	rdi->dparms.props.page_size_cap = PAGE_SIZE;
14498c2ecf20Sopenharmony_ci	rdi->dparms.props.vendor_id =
14508c2ecf20Sopenharmony_ci		QIB_SRC_OUI_1 << 16 | QIB_SRC_OUI_2 << 8 | QIB_SRC_OUI_3;
14518c2ecf20Sopenharmony_ci	rdi->dparms.props.vendor_part_id = dd->deviceid;
14528c2ecf20Sopenharmony_ci	rdi->dparms.props.hw_ver = dd->minrev;
14538c2ecf20Sopenharmony_ci	rdi->dparms.props.sys_image_guid = ib_qib_sys_image_guid;
14548c2ecf20Sopenharmony_ci	rdi->dparms.props.max_mr_size = ~0ULL;
14558c2ecf20Sopenharmony_ci	rdi->dparms.props.max_qp = ib_qib_max_qps;
14568c2ecf20Sopenharmony_ci	rdi->dparms.props.max_qp_wr = ib_qib_max_qp_wrs;
14578c2ecf20Sopenharmony_ci	rdi->dparms.props.max_send_sge = ib_qib_max_sges;
14588c2ecf20Sopenharmony_ci	rdi->dparms.props.max_recv_sge = ib_qib_max_sges;
14598c2ecf20Sopenharmony_ci	rdi->dparms.props.max_sge_rd = ib_qib_max_sges;
14608c2ecf20Sopenharmony_ci	rdi->dparms.props.max_cq = ib_qib_max_cqs;
14618c2ecf20Sopenharmony_ci	rdi->dparms.props.max_cqe = ib_qib_max_cqes;
14628c2ecf20Sopenharmony_ci	rdi->dparms.props.max_ah = ib_qib_max_ahs;
14638c2ecf20Sopenharmony_ci	rdi->dparms.props.max_qp_rd_atom = QIB_MAX_RDMA_ATOMIC;
14648c2ecf20Sopenharmony_ci	rdi->dparms.props.max_qp_init_rd_atom = 255;
14658c2ecf20Sopenharmony_ci	rdi->dparms.props.max_srq = ib_qib_max_srqs;
14668c2ecf20Sopenharmony_ci	rdi->dparms.props.max_srq_wr = ib_qib_max_srq_wrs;
14678c2ecf20Sopenharmony_ci	rdi->dparms.props.max_srq_sge = ib_qib_max_srq_sges;
14688c2ecf20Sopenharmony_ci	rdi->dparms.props.atomic_cap = IB_ATOMIC_GLOB;
14698c2ecf20Sopenharmony_ci	rdi->dparms.props.max_pkeys = qib_get_npkeys(dd);
14708c2ecf20Sopenharmony_ci	rdi->dparms.props.max_mcast_grp = ib_qib_max_mcast_grps;
14718c2ecf20Sopenharmony_ci	rdi->dparms.props.max_mcast_qp_attach = ib_qib_max_mcast_qp_attached;
14728c2ecf20Sopenharmony_ci	rdi->dparms.props.max_total_mcast_qp_attach =
14738c2ecf20Sopenharmony_ci					rdi->dparms.props.max_mcast_qp_attach *
14748c2ecf20Sopenharmony_ci					rdi->dparms.props.max_mcast_grp;
14758c2ecf20Sopenharmony_ci	/* post send table */
14768c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.post_parms = qib_post_parms;
14778c2ecf20Sopenharmony_ci
14788c2ecf20Sopenharmony_ci	/* opcode translation table */
14798c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.wc_opcode = ib_qib_wc_opcode;
14808c2ecf20Sopenharmony_ci}
14818c2ecf20Sopenharmony_ci
14828c2ecf20Sopenharmony_cistatic const struct ib_device_ops qib_dev_ops = {
14838c2ecf20Sopenharmony_ci	.owner = THIS_MODULE,
14848c2ecf20Sopenharmony_ci	.driver_id = RDMA_DRIVER_QIB,
14858c2ecf20Sopenharmony_ci
14868c2ecf20Sopenharmony_ci	.init_port = qib_create_port_files,
14878c2ecf20Sopenharmony_ci	.modify_device = qib_modify_device,
14888c2ecf20Sopenharmony_ci	.process_mad = qib_process_mad,
14898c2ecf20Sopenharmony_ci};
14908c2ecf20Sopenharmony_ci
14918c2ecf20Sopenharmony_ci/**
14928c2ecf20Sopenharmony_ci * qib_register_ib_device - register our device with the infiniband core
14938c2ecf20Sopenharmony_ci * @dd: the device data structure
14948c2ecf20Sopenharmony_ci * Return the allocated qib_ibdev pointer or NULL on error.
14958c2ecf20Sopenharmony_ci */
14968c2ecf20Sopenharmony_ciint qib_register_ib_device(struct qib_devdata *dd)
14978c2ecf20Sopenharmony_ci{
14988c2ecf20Sopenharmony_ci	struct qib_ibdev *dev = &dd->verbs_dev;
14998c2ecf20Sopenharmony_ci	struct ib_device *ibdev = &dev->rdi.ibdev;
15008c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = dd->pport;
15018c2ecf20Sopenharmony_ci	unsigned i, ctxt;
15028c2ecf20Sopenharmony_ci	int ret;
15038c2ecf20Sopenharmony_ci
15048c2ecf20Sopenharmony_ci	for (i = 0; i < dd->num_pports; i++)
15058c2ecf20Sopenharmony_ci		init_ibport(ppd + i);
15068c2ecf20Sopenharmony_ci
15078c2ecf20Sopenharmony_ci	/* Only need to initialize non-zero fields. */
15088c2ecf20Sopenharmony_ci	timer_setup(&dev->mem_timer, mem_timer, 0);
15098c2ecf20Sopenharmony_ci
15108c2ecf20Sopenharmony_ci	INIT_LIST_HEAD(&dev->piowait);
15118c2ecf20Sopenharmony_ci	INIT_LIST_HEAD(&dev->dmawait);
15128c2ecf20Sopenharmony_ci	INIT_LIST_HEAD(&dev->txwait);
15138c2ecf20Sopenharmony_ci	INIT_LIST_HEAD(&dev->memwait);
15148c2ecf20Sopenharmony_ci	INIT_LIST_HEAD(&dev->txreq_free);
15158c2ecf20Sopenharmony_ci
15168c2ecf20Sopenharmony_ci	if (ppd->sdma_descq_cnt) {
15178c2ecf20Sopenharmony_ci		dev->pio_hdrs = dma_alloc_coherent(&dd->pcidev->dev,
15188c2ecf20Sopenharmony_ci						ppd->sdma_descq_cnt *
15198c2ecf20Sopenharmony_ci						sizeof(struct qib_pio_header),
15208c2ecf20Sopenharmony_ci						&dev->pio_hdrs_phys,
15218c2ecf20Sopenharmony_ci						GFP_KERNEL);
15228c2ecf20Sopenharmony_ci		if (!dev->pio_hdrs) {
15238c2ecf20Sopenharmony_ci			ret = -ENOMEM;
15248c2ecf20Sopenharmony_ci			goto err_hdrs;
15258c2ecf20Sopenharmony_ci		}
15268c2ecf20Sopenharmony_ci	}
15278c2ecf20Sopenharmony_ci
15288c2ecf20Sopenharmony_ci	for (i = 0; i < ppd->sdma_descq_cnt; i++) {
15298c2ecf20Sopenharmony_ci		struct qib_verbs_txreq *tx;
15308c2ecf20Sopenharmony_ci
15318c2ecf20Sopenharmony_ci		tx = kzalloc(sizeof(*tx), GFP_KERNEL);
15328c2ecf20Sopenharmony_ci		if (!tx) {
15338c2ecf20Sopenharmony_ci			ret = -ENOMEM;
15348c2ecf20Sopenharmony_ci			goto err_tx;
15358c2ecf20Sopenharmony_ci		}
15368c2ecf20Sopenharmony_ci		tx->hdr_inx = i;
15378c2ecf20Sopenharmony_ci		list_add(&tx->txreq.list, &dev->txreq_free);
15388c2ecf20Sopenharmony_ci	}
15398c2ecf20Sopenharmony_ci
15408c2ecf20Sopenharmony_ci	/*
15418c2ecf20Sopenharmony_ci	 * The system image GUID is supposed to be the same for all
15428c2ecf20Sopenharmony_ci	 * IB HCAs in a single system but since there can be other
15438c2ecf20Sopenharmony_ci	 * device types in the system, we can't be sure this is unique.
15448c2ecf20Sopenharmony_ci	 */
15458c2ecf20Sopenharmony_ci	if (!ib_qib_sys_image_guid)
15468c2ecf20Sopenharmony_ci		ib_qib_sys_image_guid = ppd->guid;
15478c2ecf20Sopenharmony_ci
15488c2ecf20Sopenharmony_ci	ibdev->node_guid = ppd->guid;
15498c2ecf20Sopenharmony_ci	ibdev->phys_port_cnt = dd->num_pports;
15508c2ecf20Sopenharmony_ci	ibdev->dev.parent = &dd->pcidev->dev;
15518c2ecf20Sopenharmony_ci
15528c2ecf20Sopenharmony_ci	snprintf(ibdev->node_desc, sizeof(ibdev->node_desc),
15538c2ecf20Sopenharmony_ci		 "Intel Infiniband HCA %s", init_utsname()->nodename);
15548c2ecf20Sopenharmony_ci
15558c2ecf20Sopenharmony_ci	/*
15568c2ecf20Sopenharmony_ci	 * Fill in rvt info object.
15578c2ecf20Sopenharmony_ci	 */
15588c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.get_pci_dev = qib_get_pci_dev;
15598c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.check_ah = qib_check_ah;
15608c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.setup_wqe = qib_check_send_wqe;
15618c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.notify_new_ah = qib_notify_new_ah;
15628c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.alloc_qpn = qib_alloc_qpn;
15638c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qib_qp_priv_alloc;
15648c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.qp_priv_free = qib_qp_priv_free;
15658c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.free_all_qps = qib_free_all_qps;
15668c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.notify_qp_reset = qib_notify_qp_reset;
15678c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.do_send = qib_do_send;
15688c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.schedule_send = qib_schedule_send;
15698c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.quiesce_qp = qib_quiesce_qp;
15708c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.stop_send_queue = qib_stop_send_queue;
15718c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.flush_qp_waiters = qib_flush_qp_waiters;
15728c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.notify_error_qp = qib_notify_error_qp;
15738c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.notify_restart_rc = qib_restart_rc;
15748c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = qib_mtu_to_path_mtu;
15758c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.mtu_from_qp = qib_mtu_from_qp;
15768c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = qib_get_pmtu_from_attr;
15778c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _qib_schedule_send;
15788c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.query_port_state = qib_query_port;
15798c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.shut_down_port = qib_shut_down_port;
15808c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.cap_mask_chg = qib_cap_mask_chg;
15818c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.notify_create_mad_agent =
15828c2ecf20Sopenharmony_ci						qib_notify_create_mad_agent;
15838c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.notify_free_mad_agent =
15848c2ecf20Sopenharmony_ci						qib_notify_free_mad_agent;
15858c2ecf20Sopenharmony_ci
15868c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.max_rdma_atomic = QIB_MAX_RDMA_ATOMIC;
15878c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.driver_f.get_guid_be = qib_get_guid_be;
15888c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.lkey_table_size = qib_lkey_table_size;
15898c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.qp_table_size = ib_qib_qp_table_size;
15908c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.qpn_start = 1;
15918c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.qpn_res_start = QIB_KD_QP;
15928c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.qpn_res_end = QIB_KD_QP; /* Reserve one QP */
15938c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.qpn_inc = 1;
15948c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.qos_shift = 1;
15958c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.psn_mask = QIB_PSN_MASK;
15968c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.psn_shift = QIB_PSN_SHIFT;
15978c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.psn_modify_mask = QIB_PSN_MASK;
15988c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.nports = dd->num_pports;
15998c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.npkeys = qib_get_npkeys(dd);
16008c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.node = dd->assigned_node_id;
16018c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.core_cap_flags = RDMA_CORE_PORT_IBA_IB;
16028c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.max_mad_size = IB_MGMT_MAD_SIZE;
16038c2ecf20Sopenharmony_ci	dd->verbs_dev.rdi.dparms.sge_copy_mode = RVT_SGE_COPY_MEMCPY;
16048c2ecf20Sopenharmony_ci
16058c2ecf20Sopenharmony_ci	qib_fill_device_attr(dd);
16068c2ecf20Sopenharmony_ci
16078c2ecf20Sopenharmony_ci	ppd = dd->pport;
16088c2ecf20Sopenharmony_ci	for (i = 0; i < dd->num_pports; i++, ppd++) {
16098c2ecf20Sopenharmony_ci		ctxt = ppd->hw_pidx;
16108c2ecf20Sopenharmony_ci		rvt_init_port(&dd->verbs_dev.rdi,
16118c2ecf20Sopenharmony_ci			      &ppd->ibport_data.rvp,
16128c2ecf20Sopenharmony_ci			      i,
16138c2ecf20Sopenharmony_ci			      dd->rcd[ctxt]->pkeys);
16148c2ecf20Sopenharmony_ci	}
16158c2ecf20Sopenharmony_ci	rdma_set_device_sysfs_group(&dd->verbs_dev.rdi.ibdev, &qib_attr_group);
16168c2ecf20Sopenharmony_ci
16178c2ecf20Sopenharmony_ci	ib_set_device_ops(ibdev, &qib_dev_ops);
16188c2ecf20Sopenharmony_ci	ret = rvt_register_device(&dd->verbs_dev.rdi);
16198c2ecf20Sopenharmony_ci	if (ret)
16208c2ecf20Sopenharmony_ci		goto err_tx;
16218c2ecf20Sopenharmony_ci
16228c2ecf20Sopenharmony_ci	return ret;
16238c2ecf20Sopenharmony_ci
16248c2ecf20Sopenharmony_cierr_tx:
16258c2ecf20Sopenharmony_ci	while (!list_empty(&dev->txreq_free)) {
16268c2ecf20Sopenharmony_ci		struct list_head *l = dev->txreq_free.next;
16278c2ecf20Sopenharmony_ci		struct qib_verbs_txreq *tx;
16288c2ecf20Sopenharmony_ci
16298c2ecf20Sopenharmony_ci		list_del(l);
16308c2ecf20Sopenharmony_ci		tx = list_entry(l, struct qib_verbs_txreq, txreq.list);
16318c2ecf20Sopenharmony_ci		kfree(tx);
16328c2ecf20Sopenharmony_ci	}
16338c2ecf20Sopenharmony_ci	if (ppd->sdma_descq_cnt)
16348c2ecf20Sopenharmony_ci		dma_free_coherent(&dd->pcidev->dev,
16358c2ecf20Sopenharmony_ci				  ppd->sdma_descq_cnt *
16368c2ecf20Sopenharmony_ci					sizeof(struct qib_pio_header),
16378c2ecf20Sopenharmony_ci				  dev->pio_hdrs, dev->pio_hdrs_phys);
16388c2ecf20Sopenharmony_cierr_hdrs:
16398c2ecf20Sopenharmony_ci	qib_dev_err(dd, "cannot register verbs: %d!\n", -ret);
16408c2ecf20Sopenharmony_ci	return ret;
16418c2ecf20Sopenharmony_ci}
16428c2ecf20Sopenharmony_ci
16438c2ecf20Sopenharmony_civoid qib_unregister_ib_device(struct qib_devdata *dd)
16448c2ecf20Sopenharmony_ci{
16458c2ecf20Sopenharmony_ci	struct qib_ibdev *dev = &dd->verbs_dev;
16468c2ecf20Sopenharmony_ci
16478c2ecf20Sopenharmony_ci	qib_verbs_unregister_sysfs(dd);
16488c2ecf20Sopenharmony_ci
16498c2ecf20Sopenharmony_ci	rvt_unregister_device(&dd->verbs_dev.rdi);
16508c2ecf20Sopenharmony_ci
16518c2ecf20Sopenharmony_ci	if (!list_empty(&dev->piowait))
16528c2ecf20Sopenharmony_ci		qib_dev_err(dd, "piowait list not empty!\n");
16538c2ecf20Sopenharmony_ci	if (!list_empty(&dev->dmawait))
16548c2ecf20Sopenharmony_ci		qib_dev_err(dd, "dmawait list not empty!\n");
16558c2ecf20Sopenharmony_ci	if (!list_empty(&dev->txwait))
16568c2ecf20Sopenharmony_ci		qib_dev_err(dd, "txwait list not empty!\n");
16578c2ecf20Sopenharmony_ci	if (!list_empty(&dev->memwait))
16588c2ecf20Sopenharmony_ci		qib_dev_err(dd, "memwait list not empty!\n");
16598c2ecf20Sopenharmony_ci
16608c2ecf20Sopenharmony_ci	del_timer_sync(&dev->mem_timer);
16618c2ecf20Sopenharmony_ci	while (!list_empty(&dev->txreq_free)) {
16628c2ecf20Sopenharmony_ci		struct list_head *l = dev->txreq_free.next;
16638c2ecf20Sopenharmony_ci		struct qib_verbs_txreq *tx;
16648c2ecf20Sopenharmony_ci
16658c2ecf20Sopenharmony_ci		list_del(l);
16668c2ecf20Sopenharmony_ci		tx = list_entry(l, struct qib_verbs_txreq, txreq.list);
16678c2ecf20Sopenharmony_ci		kfree(tx);
16688c2ecf20Sopenharmony_ci	}
16698c2ecf20Sopenharmony_ci	if (dd->pport->sdma_descq_cnt)
16708c2ecf20Sopenharmony_ci		dma_free_coherent(&dd->pcidev->dev,
16718c2ecf20Sopenharmony_ci				  dd->pport->sdma_descq_cnt *
16728c2ecf20Sopenharmony_ci					sizeof(struct qib_pio_header),
16738c2ecf20Sopenharmony_ci				  dev->pio_hdrs, dev->pio_hdrs_phys);
16748c2ecf20Sopenharmony_ci}
16758c2ecf20Sopenharmony_ci
16768c2ecf20Sopenharmony_ci/**
16778c2ecf20Sopenharmony_ci * _qib_schedule_send - schedule progress
16788c2ecf20Sopenharmony_ci * @qp - the qp
16798c2ecf20Sopenharmony_ci *
16808c2ecf20Sopenharmony_ci * This schedules progress w/o regard to the s_flags.
16818c2ecf20Sopenharmony_ci *
16828c2ecf20Sopenharmony_ci * It is only used in post send, which doesn't hold
16838c2ecf20Sopenharmony_ci * the s_lock.
16848c2ecf20Sopenharmony_ci */
16858c2ecf20Sopenharmony_cibool _qib_schedule_send(struct rvt_qp *qp)
16868c2ecf20Sopenharmony_ci{
16878c2ecf20Sopenharmony_ci	struct qib_ibport *ibp =
16888c2ecf20Sopenharmony_ci		to_iport(qp->ibqp.device, qp->port_num);
16898c2ecf20Sopenharmony_ci	struct qib_pportdata *ppd = ppd_from_ibp(ibp);
16908c2ecf20Sopenharmony_ci	struct qib_qp_priv *priv = qp->priv;
16918c2ecf20Sopenharmony_ci
16928c2ecf20Sopenharmony_ci	return queue_work(ppd->qib_wq, &priv->s_work);
16938c2ecf20Sopenharmony_ci}
16948c2ecf20Sopenharmony_ci
16958c2ecf20Sopenharmony_ci/**
16968c2ecf20Sopenharmony_ci * qib_schedule_send - schedule progress
16978c2ecf20Sopenharmony_ci * @qp - the qp
16988c2ecf20Sopenharmony_ci *
16998c2ecf20Sopenharmony_ci * This schedules qp progress.  The s_lock
17008c2ecf20Sopenharmony_ci * should be held.
17018c2ecf20Sopenharmony_ci */
17028c2ecf20Sopenharmony_cibool qib_schedule_send(struct rvt_qp *qp)
17038c2ecf20Sopenharmony_ci{
17048c2ecf20Sopenharmony_ci	if (qib_send_ok(qp))
17058c2ecf20Sopenharmony_ci		return _qib_schedule_send(qp);
17068c2ecf20Sopenharmony_ci	return false;
17078c2ecf20Sopenharmony_ci}
1708