Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2051 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c
new file mode 100644
index 000000000..1cf1dfbf2
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/verbs.c
@@ -0,0 +1,2051 @@
+/*
+ * Copyright(c) 2015 - 2018 Intel Corporation.
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  - Neither the name of Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <rdma/ib_mad.h>
+#include <rdma/ib_user_verbs.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/utsname.h>
+#include <linux/rculist.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <rdma/opa_addr.h>
+#include <linux/nospec.h>
+
+#include "hfi.h"
+#include "common.h"
+#include "device.h"
+#include "trace.h"
+#include "qp.h"
+#include "verbs_txreq.h"
+#include "debugfs.h"
+#include "vnic.h"
+#include "fault.h"
+#include "affinity.h"
+
+static unsigned int hfi1_lkey_table_size = 16;
+module_param_named(lkey_table_size, hfi1_lkey_table_size, uint,
+		   S_IRUGO);
+MODULE_PARM_DESC(lkey_table_size,
+		 "LKEY table size in bits (2^n, 1 <= n <= 23)");
+
+static unsigned int hfi1_max_pds = 0xFFFF;
+module_param_named(max_pds, hfi1_max_pds, uint, S_IRUGO);
+MODULE_PARM_DESC(max_pds,
+		 "Maximum number of protection domains to support");
+
+static unsigned int hfi1_max_ahs = 0xFFFF;
+module_param_named(max_ahs, hfi1_max_ahs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
+
+unsigned int hfi1_max_cqes = 0x2FFFFF;
+module_param_named(max_cqes, hfi1_max_cqes, uint, S_IRUGO);
+MODULE_PARM_DESC(max_cqes,
+		 "Maximum number of completion queue entries to support");
+
+unsigned int hfi1_max_cqs = 0x1FFFF;
+module_param_named(max_cqs, hfi1_max_cqs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
+
+unsigned int hfi1_max_qp_wrs = 0x3FFF;
+module_param_named(max_qp_wrs, hfi1_max_qp_wrs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
+
+unsigned int hfi1_max_qps = 32768;
+module_param_named(max_qps, hfi1_max_qps, uint, S_IRUGO);
+MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");
+
+unsigned int hfi1_max_sges = 0x60;
+module_param_named(max_sges, hfi1_max_sges, uint, S_IRUGO);
+MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
+
+unsigned int hfi1_max_mcast_grps = 16384;
+module_param_named(max_mcast_grps, hfi1_max_mcast_grps, uint, S_IRUGO);
+MODULE_PARM_DESC(max_mcast_grps,
+		 "Maximum number of multicast groups to support");
+
+unsigned int hfi1_max_mcast_qp_attached = 16;
+module_param_named(max_mcast_qp_attached, hfi1_max_mcast_qp_attached,
+		   uint, S_IRUGO);
+MODULE_PARM_DESC(max_mcast_qp_attached,
+		 "Maximum number of attached QPs to support");
+
+unsigned int hfi1_max_srqs = 1024;
+module_param_named(max_srqs, hfi1_max_srqs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
+
+unsigned int hfi1_max_srq_sges = 128;
+module_param_named(max_srq_sges, hfi1_max_srq_sges, uint, S_IRUGO);
+MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
+
+unsigned int hfi1_max_srq_wrs = 0x1FFFF;
+module_param_named(max_srq_wrs, hfi1_max_srq_wrs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
+
+unsigned short piothreshold = 256;
+module_param(piothreshold, ushort, S_IRUGO);
+MODULE_PARM_DESC(piothreshold, "size used to determine sdma vs. pio");
+
+#define COPY_CACHELESS 1
+#define COPY_ADAPTIVE  2
+static unsigned int sge_copy_mode;
+module_param(sge_copy_mode, uint, S_IRUGO);
+MODULE_PARM_DESC(sge_copy_mode,
+		 "Verbs copy mode: 0 use memcpy, 1 use cacheless copy, 2 adapt based on WSS");
+
+static void verbs_sdma_complete(
+	struct sdma_txreq *cookie,
+	int status);
+
+static int pio_wait(struct rvt_qp *qp,
+		    struct send_context *sc,
+		    struct hfi1_pkt_state *ps,
+		    u32 flag);
+
+/* Length of buffer to create verbs txreq cache name */
+#define TXREQ_NAME_LEN 24
+
+static uint wss_threshold;
+module_param(wss_threshold, uint, S_IRUGO);
+MODULE_PARM_DESC(wss_threshold, "Percentage (1-100) of LLC to use as a threshold for a cacheless copy");
+static uint wss_clean_period = 256;
+module_param(wss_clean_period, uint, S_IRUGO);
+MODULE_PARM_DESC(wss_clean_period, "Count of verbs copies before an entry in the page copy table is cleaned");
+
+/* memory working set size */
+struct hfi1_wss {
+	unsigned long *entries;
+	atomic_t total_count;
+	atomic_t clean_counter;
+	atomic_t clean_entry;
+
+	int threshold;
+	int num_entries;
+	long pages_mask;
+};
+
+static struct hfi1_wss wss;
+
+int hfi1_wss_init(void)
+{
+	long llc_size;
+	long llc_bits;
+	long table_size;
+	long table_bits;
+
+	/* check for a valid percent range - default to 80 if none or invalid */
+	if (wss_threshold < 1 || wss_threshold > 100)
+		wss_threshold = 80;
+	/* reject a wildly large period */
+	if (wss_clean_period > 1000000)
+		wss_clean_period = 256;
+	/* reject a zero period */
+	if (wss_clean_period == 0)
+		wss_clean_period = 1;
+
+	/*
+	 * Calculate the table size - the next power of 2 larger than the
+	 * LLC size.  LLC size is in KiB.
+	 */
+	llc_size = wss_llc_size() * 1024;
+	table_size = roundup_pow_of_two(llc_size);
+
+	/* one bit per page in rounded up table */
+	llc_bits = llc_size / PAGE_SIZE;
+	table_bits = table_size / PAGE_SIZE;
+	wss.pages_mask = table_bits - 1;
+	wss.num_entries = table_bits / BITS_PER_LONG;
+
+	wss.threshold = (llc_bits * wss_threshold) / 100;
+	if (wss.threshold == 0)
+		wss.threshold = 1;
+
+	atomic_set(&wss.clean_counter, wss_clean_period);
+
+	wss.entries = kcalloc(wss.num_entries, sizeof(*wss.entries),
+			      GFP_KERNEL);
+	if (!wss.entries) {
+		hfi1_wss_exit();
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+void hfi1_wss_exit(void)
+{
+	/* coded to handle partially initialized and repeat callers */
+	kfree(wss.entries);
+	wss.entries = NULL;
+}
+
+/*
+ * Advance the clean counter.  When the clean period has expired,
+ * clean an entry.
+ *
+ * This is implemented in atomics to avoid locking.  Because multiple
+ * variables are involved, it can be racy which can lead to slightly
+ * inaccurate information.  Since this is only a heuristic, this is
+ * OK.  Any innaccuracies will clean themselves out as the counter
+ * advances.  That said, it is unlikely the entry clean operation will
+ * race - the next possible racer will not start until the next clean
+ * period.
+ *
+ * The clean counter is implemented as a decrement to zero.  When zero
+ * is reached an entry is cleaned.
+ */
+static void wss_advance_clean_counter(void)
+{
+	int entry;
+	int weight;
+	unsigned long bits;
+
+	/* become the cleaner if we decrement the counter to zero */
+	if (atomic_dec_and_test(&wss.clean_counter)) {
+		/*
+		 * Set, not add, the clean period.  This avoids an issue
+		 * where the counter could decrement below the clean period.
+		 * Doing a set can result in lost decrements, slowing the
+		 * clean advance.  Since this a heuristic, this possible
+		 * slowdown is OK.
+		 *
+		 * An alternative is to loop, advancing the counter by a
+		 * clean period until the result is > 0. However, this could
+		 * lead to several threads keeping another in the clean loop.
+		 * This could be mitigated by limiting the number of times
+		 * we stay in the loop.
+		 */
+		atomic_set(&wss.clean_counter, wss_clean_period);
+
+		/*
+		 * Uniquely grab the entry to clean and move to next.
+		 * The current entry is always the lower bits of
+		 * wss.clean_entry.  The table size, wss.num_entries,
+		 * is always a power-of-2.
+		 */
+		entry = (atomic_inc_return(&wss.clean_entry) - 1)
+			& (wss.num_entries - 1);
+
+		/* clear the entry and count the bits */
+		bits = xchg(&wss.entries[entry], 0);
+		weight = hweight64((u64)bits);
+		/* only adjust the contended total count if needed */
+		if (weight)
+			atomic_sub(weight, &wss.total_count);
+	}
+}
+
+/*
+ * Insert the given address into the working set array.
+ */
+static void wss_insert(void *address)
+{
+	u32 page = ((unsigned long)address >> PAGE_SHIFT) & wss.pages_mask;
+	u32 entry = page / BITS_PER_LONG; /* assumes this ends up a shift */
+	u32 nr = page & (BITS_PER_LONG - 1);
+
+	if (!test_and_set_bit(nr, &wss.entries[entry]))
+		atomic_inc(&wss.total_count);
+
+	wss_advance_clean_counter();
+}
+
+/*
+ * Is the working set larger than the threshold?
+ */
+static inline bool wss_exceeds_threshold(void)
+{
+	return atomic_read(&wss.total_count) >= wss.threshold;
+}
+
+/*
+ * Translate ib_wr_opcode into ib_wc_opcode.
+ */
+const enum ib_wc_opcode ib_hfi1_wc_opcode[] = {
+	[IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
+	[IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
+	[IB_WR_SEND] = IB_WC_SEND,
+	[IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
+	[IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
+	[IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
+	[IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD,
+	[IB_WR_SEND_WITH_INV] = IB_WC_SEND,
+	[IB_WR_LOCAL_INV] = IB_WC_LOCAL_INV,
+	[IB_WR_REG_MR] = IB_WC_REG_MR
+};
+
+/*
+ * Length of header by opcode, 0 --> not supported
+ */
+const u8 hdr_len_by_opcode[256] = {
+	/* RC */
+	[IB_OPCODE_RC_SEND_FIRST]                     = 12 + 8,
+	[IB_OPCODE_RC_SEND_MIDDLE]                    = 12 + 8,
+	[IB_OPCODE_RC_SEND_LAST]                      = 12 + 8,
+	[IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE]       = 12 + 8 + 4,
+	[IB_OPCODE_RC_SEND_ONLY]                      = 12 + 8,
+	[IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE]       = 12 + 8 + 4,
+	[IB_OPCODE_RC_RDMA_WRITE_FIRST]               = 12 + 8 + 16,
+	[IB_OPCODE_RC_RDMA_WRITE_MIDDLE]              = 12 + 8,
+	[IB_OPCODE_RC_RDMA_WRITE_LAST]                = 12 + 8,
+	[IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+	[IB_OPCODE_RC_RDMA_WRITE_ONLY]                = 12 + 8 + 16,
+	[IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
+	[IB_OPCODE_RC_RDMA_READ_REQUEST]              = 12 + 8 + 16,
+	[IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST]       = 12 + 8 + 4,
+	[IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE]      = 12 + 8,
+	[IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST]        = 12 + 8 + 4,
+	[IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY]        = 12 + 8 + 4,
+	[IB_OPCODE_RC_ACKNOWLEDGE]                    = 12 + 8 + 4,
+	[IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE]             = 12 + 8 + 4 + 8,
+	[IB_OPCODE_RC_COMPARE_SWAP]                   = 12 + 8 + 28,
+	[IB_OPCODE_RC_FETCH_ADD]                      = 12 + 8 + 28,
+	[IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE]      = 12 + 8 + 4,
+	[IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE]      = 12 + 8 + 4,
+	/* UC */
+	[IB_OPCODE_UC_SEND_FIRST]                     = 12 + 8,
+	[IB_OPCODE_UC_SEND_MIDDLE]                    = 12 + 8,
+	[IB_OPCODE_UC_SEND_LAST]                      = 12 + 8,
+	[IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE]       = 12 + 8 + 4,
+	[IB_OPCODE_UC_SEND_ONLY]                      = 12 + 8,
+	[IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE]       = 12 + 8 + 4,
+	[IB_OPCODE_UC_RDMA_WRITE_FIRST]               = 12 + 8 + 16,
+	[IB_OPCODE_UC_RDMA_WRITE_MIDDLE]              = 12 + 8,
+	[IB_OPCODE_UC_RDMA_WRITE_LAST]                = 12 + 8,
+	[IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+	[IB_OPCODE_UC_RDMA_WRITE_ONLY]                = 12 + 8 + 16,
+	[IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
+	/* UD */
+	[IB_OPCODE_UD_SEND_ONLY]                      = 12 + 8 + 8,
+	[IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE]       = 12 + 8 + 12
+};
+
+static const opcode_handler opcode_handler_tbl[256] = {
+	/* RC */
+	[IB_OPCODE_RC_SEND_FIRST]                     = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_SEND_MIDDLE]                    = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_SEND_LAST]                      = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE]       = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_SEND_ONLY]                      = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE]       = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_WRITE_FIRST]               = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_WRITE_MIDDLE]              = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_WRITE_LAST]                = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_WRITE_ONLY]                = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_READ_REQUEST]              = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST]       = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE]      = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST]        = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY]        = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_ACKNOWLEDGE]                    = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE]             = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_COMPARE_SWAP]                   = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_FETCH_ADD]                      = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_SEND_LAST_WITH_INVALIDATE]      = &hfi1_rc_rcv,
+	[IB_OPCODE_RC_SEND_ONLY_WITH_INVALIDATE]      = &hfi1_rc_rcv,
+	/* UC */
+	[IB_OPCODE_UC_SEND_FIRST]                     = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_SEND_MIDDLE]                    = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_SEND_LAST]                      = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE]       = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_SEND_ONLY]                      = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE]       = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_RDMA_WRITE_FIRST]               = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_RDMA_WRITE_MIDDLE]              = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_RDMA_WRITE_LAST]                = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_RDMA_WRITE_ONLY]                = &hfi1_uc_rcv,
+	[IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv,
+	/* UD */
+	[IB_OPCODE_UD_SEND_ONLY]                      = &hfi1_ud_rcv,
+	[IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE]       = &hfi1_ud_rcv,
+	/* CNP */
+	[IB_OPCODE_CNP]				      = &hfi1_cnp_rcv
+};
+
+#define OPMASK 0x1f
+
+static const u32 pio_opmask[BIT(3)] = {
+	/* RC */
+	[IB_OPCODE_RC >> 5] =
+		BIT(RC_OP(SEND_ONLY) & OPMASK) |
+		BIT(RC_OP(SEND_ONLY_WITH_IMMEDIATE) & OPMASK) |
+		BIT(RC_OP(RDMA_WRITE_ONLY) & OPMASK) |
+		BIT(RC_OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE) & OPMASK) |
+		BIT(RC_OP(RDMA_READ_REQUEST) & OPMASK) |
+		BIT(RC_OP(ACKNOWLEDGE) & OPMASK) |
+		BIT(RC_OP(ATOMIC_ACKNOWLEDGE) & OPMASK) |
+		BIT(RC_OP(COMPARE_SWAP) & OPMASK) |
+		BIT(RC_OP(FETCH_ADD) & OPMASK),
+	/* UC */
+	[IB_OPCODE_UC >> 5] =
+		BIT(UC_OP(SEND_ONLY) & OPMASK) |
+		BIT(UC_OP(SEND_ONLY_WITH_IMMEDIATE) & OPMASK) |
+		BIT(UC_OP(RDMA_WRITE_ONLY) & OPMASK) |
+		BIT(UC_OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE) & OPMASK),
+};
+
+/*
+ * System image GUID.
+ */
+__be64 ib_hfi1_sys_image_guid;
+
+/**
+ * hfi1_copy_sge - copy data to SGE memory
+ * @ss: the SGE state
+ * @data: the data to copy
+ * @length: the length of the data
+ * @release: boolean to release MR
+ * @copy_last: do a separate copy of the last 8 bytes
+ */
+void hfi1_copy_sge(
+	struct rvt_sge_state *ss,
+	void *data, u32 length,
+	bool release,
+	bool copy_last)
+{
+	struct rvt_sge *sge = &ss->sge;
+	int i;
+	bool in_last = false;
+	bool cacheless_copy = false;
+
+	if (sge_copy_mode == COPY_CACHELESS) {
+		cacheless_copy = length >= PAGE_SIZE;
+	} else if (sge_copy_mode == COPY_ADAPTIVE) {
+		if (length >= PAGE_SIZE) {
+			/*
+			 * NOTE: this *assumes*:
+			 * o The first vaddr is the dest.
+			 * o If multiple pages, then vaddr is sequential.
+			 */
+			wss_insert(sge->vaddr);
+			if (length >= (2 * PAGE_SIZE))
+				wss_insert(sge->vaddr + PAGE_SIZE);
+
+			cacheless_copy = wss_exceeds_threshold();
+		} else {
+			wss_advance_clean_counter();
+		}
+	}
+	if (copy_last) {
+		if (length > 8) {
+			length -= 8;
+		} else {
+			copy_last = false;
+			in_last = true;
+		}
+	}
+
+again:
+	while (length) {
+		u32 len = rvt_get_sge_length(sge, length);
+
+		WARN_ON_ONCE(len == 0);
+		if (unlikely(in_last)) {
+			/* enforce byte transfer ordering */
+			for (i = 0; i < len; i++)
+				((u8 *)sge->vaddr)[i] = ((u8 *)data)[i];
+		} else if (cacheless_copy) {
+			cacheless_memcpy(sge->vaddr, data, len);
+		} else {
+			memcpy(sge->vaddr, data, len);
+		}
+		rvt_update_sge(ss, len, release);
+		data += len;
+		length -= len;
+	}
+
+	if (copy_last) {
+		copy_last = false;
+		in_last = true;
+		length = 8;
+		goto again;
+	}
+}
+
+/*
+ * Make sure the QP is ready and able to accept the given opcode.
+ */
+static inline opcode_handler qp_ok(struct hfi1_packet *packet)
+{
+	if (!(ib_rvt_state_ops[packet->qp->state] & RVT_PROCESS_RECV_OK))
+		return NULL;
+	if (((packet->opcode & RVT_OPCODE_QP_MASK) ==
+	     packet->qp->allowed_ops) ||
+	    (packet->opcode == IB_OPCODE_CNP))
+		return opcode_handler_tbl[packet->opcode];
+
+	return NULL;
+}
+
+static u64 hfi1_fault_tx(struct rvt_qp *qp, u8 opcode, u64 pbc)
+{
+#ifdef CONFIG_FAULT_INJECTION
+	if ((opcode & IB_OPCODE_MSP) == IB_OPCODE_MSP)
+		/*
+		 * In order to drop non-IB traffic we
+		 * set PbcInsertHrc to NONE (0x2).
+		 * The packet will still be delivered
+		 * to the receiving node but a
+		 * KHdrHCRCErr (KDETH packet with a bad
+		 * HCRC) will be triggered and the
+		 * packet will not be delivered to the
+		 * correct context.
+		 */
+		pbc |= (u64)PBC_IHCRC_NONE << PBC_INSERT_HCRC_SHIFT;
+	else
+		/*
+		 * In order to drop regular verbs
+		 * traffic we set the PbcTestEbp
+		 * flag. The packet will still be
+		 * delivered to the receiving node but
+		 * a 'late ebp error' will be
+		 * triggered and will be dropped.
+		 */
+		pbc |= PBC_TEST_EBP;
+#endif
+	return pbc;
+}
+
+static int hfi1_do_pkey_check(struct hfi1_packet *packet)
+{
+	struct hfi1_ctxtdata *rcd = packet->rcd;
+	struct hfi1_pportdata *ppd = rcd->ppd;
+	struct hfi1_16b_header *hdr = packet->hdr;
+	u16 pkey;
+
+	/* Pkey check needed only for bypass packets */
+	if (packet->etype != RHF_RCV_TYPE_BYPASS)
+		return 0;
+
+	/* Perform pkey check */
+	pkey = hfi1_16B_get_pkey(hdr);
+	return ingress_pkey_check(ppd, pkey, packet->sc,
+				  packet->qp->s_pkey_index,
+				  packet->slid, true);
+}
+
+static inline void hfi1_handle_packet(struct hfi1_packet *packet,
+				      bool is_mcast)
+{
+	u32 qp_num;
+	struct hfi1_ctxtdata *rcd = packet->rcd;
+	struct hfi1_pportdata *ppd = rcd->ppd;
+	struct hfi1_ibport *ibp = rcd_to_iport(rcd);
+	struct rvt_dev_info *rdi = &ppd->dd->verbs_dev.rdi;
+	opcode_handler packet_handler;
+	unsigned long flags;
+
+	inc_opstats(packet->tlen, &rcd->opstats->stats[packet->opcode]);
+
+	if (unlikely(is_mcast)) {
+		struct rvt_mcast *mcast;
+		struct rvt_mcast_qp *p;
+
+		if (!packet->grh)
+			goto drop;
+		mcast = rvt_mcast_find(&ibp->rvp,
+				       &packet->grh->dgid,
+				       opa_get_lid(packet->dlid, 9B));
+		if (!mcast)
+			goto drop;
+		rcu_read_lock();
+		list_for_each_entry_rcu(p, &mcast->qp_list, list) {
+			packet->qp = p->qp;
+			if (hfi1_do_pkey_check(packet))
+				goto unlock_drop;
+			spin_lock_irqsave(&packet->qp->r_lock, flags);
+			packet_handler = qp_ok(packet);
+			if (likely(packet_handler))
+				packet_handler(packet);
+			else
+				ibp->rvp.n_pkt_drops++;
+			spin_unlock_irqrestore(&packet->qp->r_lock, flags);
+		}
+		rcu_read_unlock();
+		/*
+		 * Notify rvt_multicast_detach() if it is waiting for us
+		 * to finish.
+		 */
+		if (atomic_dec_return(&mcast->refcount) <= 1)
+			wake_up(&mcast->wait);
+	} else {
+		/* Get the destination QP number. */
+		if (packet->etype == RHF_RCV_TYPE_BYPASS &&
+		    hfi1_16B_get_l4(packet->hdr) == OPA_16B_L4_FM)
+			qp_num = hfi1_16B_get_dest_qpn(packet->mgmt);
+		else
+			qp_num = ib_bth_get_qpn(packet->ohdr);
+
+		rcu_read_lock();
+		packet->qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
+		if (!packet->qp)
+			goto unlock_drop;
+
+		if (hfi1_do_pkey_check(packet))
+			goto unlock_drop;
+
+		spin_lock_irqsave(&packet->qp->r_lock, flags);
+		packet_handler = qp_ok(packet);
+		if (likely(packet_handler))
+			packet_handler(packet);
+		else
+			ibp->rvp.n_pkt_drops++;
+		spin_unlock_irqrestore(&packet->qp->r_lock, flags);
+		rcu_read_unlock();
+	}
+	return;
+unlock_drop:
+	rcu_read_unlock();
+drop:
+	ibp->rvp.n_pkt_drops++;
+}
+
+/**
+ * hfi1_ib_rcv - process an incoming packet
+ * @packet: data packet information
+ *
+ * This is called to process an incoming packet at interrupt level.
+ */
+void hfi1_ib_rcv(struct hfi1_packet *packet)
+{
+	struct hfi1_ctxtdata *rcd = packet->rcd;
+
+	trace_input_ibhdr(rcd->dd, packet, !!(rhf_dc_info(packet->rhf)));
+	hfi1_handle_packet(packet, hfi1_check_mcast(packet->dlid));
+}
+
+void hfi1_16B_rcv(struct hfi1_packet *packet)
+{
+	struct hfi1_ctxtdata *rcd = packet->rcd;
+
+	trace_input_ibhdr(rcd->dd, packet, false);
+	hfi1_handle_packet(packet, hfi1_check_mcast(packet->dlid));
+}
+
+/*
+ * This is called from a timer to check for QPs
+ * which need kernel memory in order to send a packet.
+ */
+static void mem_timer(struct timer_list *t)
+{
+	struct hfi1_ibdev *dev = from_timer(dev, t, mem_timer);
+	struct list_head *list = &dev->memwait;
+	struct rvt_qp *qp = NULL;
+	struct iowait *wait;
+	unsigned long flags;
+	struct hfi1_qp_priv *priv;
+
+	write_seqlock_irqsave(&dev->iowait_lock, flags);
+	if (!list_empty(list)) {
+		wait = list_first_entry(list, struct iowait, list);
+		qp = iowait_to_qp(wait);
+		priv = qp->priv;
+		list_del_init(&priv->s_iowait.list);
+		priv->s_iowait.lock = NULL;
+		/* refcount held until actual wake up */
+		if (!list_empty(list))
+			mod_timer(&dev->mem_timer, jiffies + 1);
+	}
+	write_sequnlock_irqrestore(&dev->iowait_lock, flags);
+
+	if (qp)
+		hfi1_qp_wakeup(qp, RVT_S_WAIT_KMEM);
+}
+
+/*
+ * This is called with progress side lock held.
+ */
+/* New API */
+static void verbs_sdma_complete(
+	struct sdma_txreq *cookie,
+	int status)
+{
+	struct verbs_txreq *tx =
+		container_of(cookie, struct verbs_txreq, txreq);
+	struct rvt_qp *qp = tx->qp;
+
+	spin_lock(&qp->s_lock);
+	if (tx->wqe) {
+		hfi1_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
+	} else if (qp->ibqp.qp_type == IB_QPT_RC) {
+		struct hfi1_opa_header *hdr;
+
+		hdr = &tx->phdr.hdr;
+		hfi1_rc_send_complete(qp, hdr);
+	}
+	spin_unlock(&qp->s_lock);
+
+	hfi1_put_txreq(tx);
+}
+
+static int wait_kmem(struct hfi1_ibdev *dev,
+		     struct rvt_qp *qp,
+		     struct hfi1_pkt_state *ps)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&qp->s_lock, flags);
+	if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
+		write_seqlock(&dev->iowait_lock);
+		list_add_tail(&ps->s_txreq->txreq.list,
+			      &priv->s_iowait.tx_head);
+		if (list_empty(&priv->s_iowait.list)) {
+			if (list_empty(&dev->memwait))
+				mod_timer(&dev->mem_timer, jiffies + 1);
+			qp->s_flags |= RVT_S_WAIT_KMEM;
+			list_add_tail(&priv->s_iowait.list, &dev->memwait);
+			priv->s_iowait.lock = &dev->iowait_lock;
+			trace_hfi1_qpsleep(qp, RVT_S_WAIT_KMEM);
+			rvt_get_qp(qp);
+		}
+		write_sequnlock(&dev->iowait_lock);
+		qp->s_flags &= ~RVT_S_BUSY;
+		ret = -EBUSY;
+	}
+	spin_unlock_irqrestore(&qp->s_lock, flags);
+
+	return ret;
+}
+
+/*
+ * This routine calls txadds for each sg entry.
+ *
+ * Add failures will revert the sge cursor
+ */
+static noinline int build_verbs_ulp_payload(
+	struct sdma_engine *sde,
+	u32 length,
+	struct verbs_txreq *tx)
+{
+	struct rvt_sge_state *ss = tx->ss;
+	struct rvt_sge *sg_list = ss->sg_list;
+	struct rvt_sge sge = ss->sge;
+	u8 num_sge = ss->num_sge;
+	u32 len;
+	int ret = 0;
+
+	while (length) {
+		len = ss->sge.length;
+		if (len > length)
+			len = length;
+		if (len > ss->sge.sge_length)
+			len = ss->sge.sge_length;
+		WARN_ON_ONCE(len == 0);
+		ret = sdma_txadd_kvaddr(
+			sde->dd,
+			&tx->txreq,
+			ss->sge.vaddr,
+			len);
+		if (ret)
+			goto bail_txadd;
+		rvt_update_sge(ss, len, false);
+		length -= len;
+	}
+	return ret;
+bail_txadd:
+	/* unwind cursor */
+	ss->sge = sge;
+	ss->num_sge = num_sge;
+	ss->sg_list = sg_list;
+	return ret;
+}
+
+/**
+ * update_tx_opstats - record stats by opcode
+ * @qp; the qp
+ * @ps: transmit packet state
+ * @plen: the plen in dwords
+ *
+ * This is a routine to record the tx opstats after a
+ * packet has been presented to the egress mechanism.
+ */
+static void update_tx_opstats(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
+			      u32 plen)
+{
+#ifdef CONFIG_DEBUG_FS
+	struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+	struct hfi1_opcode_stats_perctx *s = get_cpu_ptr(dd->tx_opstats);
+
+	inc_opstats(plen * 4, &s->stats[ps->opcode]);
+	put_cpu_ptr(s);
+#endif
+}
+
+/*
+ * Build the number of DMA descriptors needed to send length bytes of data.
+ *
+ * NOTE: DMA mapping is held in the tx until completed in the ring or
+ *       the tx desc is freed without having been submitted to the ring
+ *
+ * This routine ensures all the helper routine calls succeed.
+ */
+/* New API */
+static int build_verbs_tx_desc(
+	struct sdma_engine *sde,
+	u32 length,
+	struct verbs_txreq *tx,
+	struct hfi1_ahg_info *ahg_info,
+	u64 pbc)
+{
+	int ret = 0;
+	struct hfi1_sdma_header *phdr = &tx->phdr;
+	u16 hdrbytes = (tx->hdr_dwords + sizeof(pbc) / 4) << 2;
+	u8 extra_bytes = 0;
+
+	if (tx->phdr.hdr.hdr_type) {
+		/*
+		 * hdrbytes accounts for PBC. Need to subtract 8 bytes
+		 * before calculating padding.
+		 */
+		extra_bytes = hfi1_get_16b_padding(hdrbytes - 8, length) +
+			      (SIZE_OF_CRC << 2) + SIZE_OF_LT;
+	}
+	if (!ahg_info->ahgcount) {
+		ret = sdma_txinit_ahg(
+			&tx->txreq,
+			ahg_info->tx_flags,
+			hdrbytes + length +
+			extra_bytes,
+			ahg_info->ahgidx,
+			0,
+			NULL,
+			0,
+			verbs_sdma_complete);
+		if (ret)
+			goto bail_txadd;
+		phdr->pbc = cpu_to_le64(pbc);
+		ret = sdma_txadd_kvaddr(
+			sde->dd,
+			&tx->txreq,
+			phdr,
+			hdrbytes);
+		if (ret)
+			goto bail_txadd;
+	} else {
+		ret = sdma_txinit_ahg(
+			&tx->txreq,
+			ahg_info->tx_flags,
+			length,
+			ahg_info->ahgidx,
+			ahg_info->ahgcount,
+			ahg_info->ahgdesc,
+			hdrbytes,
+			verbs_sdma_complete);
+		if (ret)
+			goto bail_txadd;
+	}
+	/* add the ulp payload - if any. tx->ss can be NULL for acks */
+	if (tx->ss) {
+		ret = build_verbs_ulp_payload(sde, length, tx);
+		if (ret)
+			goto bail_txadd;
+	}
+
+	/* add icrc, lt byte, and padding to flit */
+	if (extra_bytes)
+		ret = sdma_txadd_daddr(sde->dd, &tx->txreq,
+				       sde->dd->sdma_pad_phys, extra_bytes);
+
+bail_txadd:
+	return ret;
+}
+
+int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
+			u64 pbc)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+	struct hfi1_ahg_info *ahg_info = priv->s_ahg;
+	u32 hdrwords = ps->s_txreq->hdr_dwords;
+	u32 len = ps->s_txreq->s_cur_size;
+	u32 plen;
+	struct hfi1_ibdev *dev = ps->dev;
+	struct hfi1_pportdata *ppd = ps->ppd;
+	struct verbs_txreq *tx;
+	u8 sc5 = priv->s_sc;
+	int ret;
+	u32 dwords;
+
+	if (ps->s_txreq->phdr.hdr.hdr_type) {
+		u8 extra_bytes = hfi1_get_16b_padding((hdrwords << 2), len);
+
+		dwords = (len + extra_bytes + (SIZE_OF_CRC << 2) +
+			  SIZE_OF_LT) >> 2;
+	} else {
+		dwords = (len + 3) >> 2;
+	}
+	plen = hdrwords + dwords + sizeof(pbc) / 4;
+
+	tx = ps->s_txreq;
+	if (!sdma_txreq_built(&tx->txreq)) {
+		if (likely(pbc == 0)) {
+			u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
+
+			/* No vl15 here */
+			/* set PBC_DC_INFO bit (aka SC[4]) in pbc */
+			if (ps->s_txreq->phdr.hdr.hdr_type)
+				pbc |= PBC_PACKET_BYPASS |
+				       PBC_INSERT_BYPASS_ICRC;
+			else
+				pbc |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT);
+
+			if (unlikely(hfi1_dbg_should_fault_tx(qp, ps->opcode)))
+				pbc = hfi1_fault_tx(qp, ps->opcode, pbc);
+			pbc = create_pbc(ppd,
+					 pbc,
+					 qp->srate_mbps,
+					 vl,
+					 plen);
+		}
+		tx->wqe = qp->s_wqe;
+		ret = build_verbs_tx_desc(tx->sde, len, tx, ahg_info, pbc);
+		if (unlikely(ret))
+			goto bail_build;
+	}
+	ret =  sdma_send_txreq(tx->sde, &priv->s_iowait, &tx->txreq,
+			       ps->pkts_sent);
+	if (unlikely(ret < 0)) {
+		if (ret == -ECOMM)
+			goto bail_ecomm;
+		return ret;
+	}
+
+	update_tx_opstats(qp, ps, plen);
+	trace_sdma_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
+				&ps->s_txreq->phdr.hdr, ib_is_sc5(sc5));
+	return ret;
+
+bail_ecomm:
+	/* The current one got "sent" */
+	return 0;
+bail_build:
+	ret = wait_kmem(dev, qp, ps);
+	if (!ret) {
+		/* free txreq - bad state */
+		hfi1_put_txreq(ps->s_txreq);
+		ps->s_txreq = NULL;
+	}
+	return ret;
+}
+
+/*
+ * If we are now in the error state, return zero to flush the
+ * send work request.
+ */
+static int pio_wait(struct rvt_qp *qp,
+		    struct send_context *sc,
+		    struct hfi1_pkt_state *ps,
+		    u32 flag)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+	struct hfi1_devdata *dd = sc->dd;
+	struct hfi1_ibdev *dev = &dd->verbs_dev;
+	unsigned long flags;
+	int ret = 0;
+
+	/*
+	 * Note that as soon as want_buffer() is called and
+	 * possibly before it returns, sc_piobufavail()
+	 * could be called. Therefore, put QP on the I/O wait list before
+	 * enabling the PIO avail interrupt.
+	 */
+	spin_lock_irqsave(&qp->s_lock, flags);
+	if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
+		write_seqlock(&dev->iowait_lock);
+		list_add_tail(&ps->s_txreq->txreq.list,
+			      &priv->s_iowait.tx_head);
+		if (list_empty(&priv->s_iowait.list)) {
+			struct hfi1_ibdev *dev = &dd->verbs_dev;
+			int was_empty;
+
+			dev->n_piowait += !!(flag & RVT_S_WAIT_PIO);
+			dev->n_piodrain += !!(flag & HFI1_S_WAIT_PIO_DRAIN);
+			qp->s_flags |= flag;
+			was_empty = list_empty(&sc->piowait);
+			iowait_queue(ps->pkts_sent, &priv->s_iowait,
+				     &sc->piowait);
+			priv->s_iowait.lock = &dev->iowait_lock;
+			trace_hfi1_qpsleep(qp, RVT_S_WAIT_PIO);
+			rvt_get_qp(qp);
+			/* counting: only call wantpiobuf_intr if first user */
+			if (was_empty)
+				hfi1_sc_wantpiobuf_intr(sc, 1);
+		}
+		write_sequnlock(&dev->iowait_lock);
+		qp->s_flags &= ~RVT_S_BUSY;
+		ret = -EBUSY;
+	}
+	spin_unlock_irqrestore(&qp->s_lock, flags);
+	return ret;
+}
+
+static void verbs_pio_complete(void *arg, int code)
+{
+	struct rvt_qp *qp = (struct rvt_qp *)arg;
+	struct hfi1_qp_priv *priv = qp->priv;
+
+	if (iowait_pio_dec(&priv->s_iowait))
+		iowait_drain_wakeup(&priv->s_iowait);
+}
+
+int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
+			u64 pbc)
+{
+	struct hfi1_qp_priv *priv = qp->priv;
+	u32 hdrwords = ps->s_txreq->hdr_dwords;
+	struct rvt_sge_state *ss = ps->s_txreq->ss;
+	u32 len = ps->s_txreq->s_cur_size;
+	u32 dwords;
+	u32 plen;
+	struct hfi1_pportdata *ppd = ps->ppd;
+	u32 *hdr;
+	u8 sc5;
+	unsigned long flags = 0;
+	struct send_context *sc;
+	struct pio_buf *pbuf;
+	int wc_status = IB_WC_SUCCESS;
+	int ret = 0;
+	pio_release_cb cb = NULL;
+	u8 extra_bytes = 0;
+
+	if (ps->s_txreq->phdr.hdr.hdr_type) {
+		u8 pad_size = hfi1_get_16b_padding((hdrwords << 2), len);
+
+		extra_bytes = pad_size + (SIZE_OF_CRC << 2) + SIZE_OF_LT;
+		dwords = (len + extra_bytes) >> 2;
+		hdr = (u32 *)&ps->s_txreq->phdr.hdr.opah;
+	} else {
+		dwords = (len + 3) >> 2;
+		hdr = (u32 *)&ps->s_txreq->phdr.hdr.ibh;
+	}
+	plen = hdrwords + dwords + sizeof(pbc) / 4;
+
+	/* only RC/UC use complete */
+	switch (qp->ibqp.qp_type) {
+	case IB_QPT_RC:
+	case IB_QPT_UC:
+		cb = verbs_pio_complete;
+		break;
+	default:
+		break;
+	}
+
+	/* vl15 special case taken care of in ud.c */
+	sc5 = priv->s_sc;
+	sc = ps->s_txreq->psc;
+
+	if (likely(pbc == 0)) {
+		u8 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
+
+		/* set PBC_DC_INFO bit (aka SC[4]) in pbc */
+		if (ps->s_txreq->phdr.hdr.hdr_type)
+			pbc |= PBC_PACKET_BYPASS | PBC_INSERT_BYPASS_ICRC;
+		else
+			pbc |= (ib_is_sc5(sc5) << PBC_DC_INFO_SHIFT);
+
+		if (unlikely(hfi1_dbg_should_fault_tx(qp, ps->opcode)))
+			pbc = hfi1_fault_tx(qp, ps->opcode, pbc);
+		pbc = create_pbc(ppd, pbc, qp->srate_mbps, vl, plen);
+	}
+	if (cb)
+		iowait_pio_inc(&priv->s_iowait);
+	pbuf = sc_buffer_alloc(sc, plen, cb, qp);
+	if (unlikely(IS_ERR_OR_NULL(pbuf))) {
+		if (cb)
+			verbs_pio_complete(qp, 0);
+		if (IS_ERR(pbuf)) {
+			/*
+			 * If we have filled the PIO buffers to capacity and are
+			 * not in an active state this request is not going to
+			 * go out to so just complete it with an error or else a
+			 * ULP or the core may be stuck waiting.
+			 */
+			hfi1_cdbg(
+				PIO,
+				"alloc failed. state not active, completing");
+			wc_status = IB_WC_GENERAL_ERR;
+			goto pio_bail;
+		} else {
+			/*
+			 * This is a normal occurrence. The PIO buffs are full
+			 * up but we are still happily sending, well we could be
+			 * so lets continue to queue the request.
+			 */
+			hfi1_cdbg(PIO, "alloc failed. state active, queuing");
+			ret = pio_wait(qp, sc, ps, RVT_S_WAIT_PIO);
+			if (!ret)
+				/* txreq not queued - free */
+				goto bail;
+			/* tx consumed in wait */
+			return ret;
+		}
+	}
+
+	if (dwords == 0) {
+		pio_copy(ppd->dd, pbuf, pbc, hdr, hdrwords);
+	} else {
+		seg_pio_copy_start(pbuf, pbc,
+				   hdr, hdrwords * 4);
+		if (ss) {
+			while (len) {
+				void *addr = ss->sge.vaddr;
+				u32 slen = ss->sge.length;
+
+				if (slen > len)
+					slen = len;
+				if (slen > ss->sge.sge_length)
+					slen = ss->sge.sge_length;
+				rvt_update_sge(ss, slen, false);
+				seg_pio_copy_mid(pbuf, addr, slen);
+				len -= slen;
+			}
+		}
+		/* add icrc, lt byte, and padding to flit */
+		if (extra_bytes)
+			seg_pio_copy_mid(pbuf, ppd->dd->sdma_pad_dma,
+					 extra_bytes);
+
+		seg_pio_copy_end(pbuf);
+	}
+
+	update_tx_opstats(qp, ps, plen);
+	trace_pio_output_ibhdr(dd_from_ibdev(qp->ibqp.device),
+			       &ps->s_txreq->phdr.hdr, ib_is_sc5(sc5));
+
+pio_bail:
+	if (qp->s_wqe) {
+		spin_lock_irqsave(&qp->s_lock, flags);
+		hfi1_send_complete(qp, qp->s_wqe, wc_status);
+		spin_unlock_irqrestore(&qp->s_lock, flags);
+	} else if (qp->ibqp.qp_type == IB_QPT_RC) {
+		spin_lock_irqsave(&qp->s_lock, flags);
+		hfi1_rc_send_complete(qp, &ps->s_txreq->phdr.hdr);
+		spin_unlock_irqrestore(&qp->s_lock, flags);
+	}
+
+	ret = 0;
+
+bail:
+	hfi1_put_txreq(ps->s_txreq);
+	return ret;
+}
+
+/*
+ * egress_pkey_matches_entry - return 1 if the pkey matches ent (ent
+ * being an entry from the partition key table), return 0
+ * otherwise. Use the matching criteria for egress partition keys
+ * specified in the OPAv1 spec., section 9.1l.7.
+ */
+static inline int egress_pkey_matches_entry(u16 pkey, u16 ent)
+{
+	u16 mkey = pkey & PKEY_LOW_15_MASK;
+	u16 mentry = ent & PKEY_LOW_15_MASK;
+
+	if (mkey == mentry) {
+		/*
+		 * If pkey[15] is set (full partition member),
+		 * is bit 15 in the corresponding table element
+		 * clear (limited member)?
+		 */
+		if (pkey & PKEY_MEMBER_MASK)
+			return !!(ent & PKEY_MEMBER_MASK);
+		return 1;
+	}
+	return 0;
+}
+
+/**
+ * egress_pkey_check - check P_KEY of a packet
+ * @ppd:  Physical IB port data
+ * @slid: SLID for packet
+ * @bkey: PKEY for header
+ * @sc5:  SC for packet
+ * @s_pkey_index: It will be used for look up optimization for kernel contexts
+ * only. If it is negative value, then it means user contexts is calling this
+ * function.
+ *
+ * It checks if hdr's pkey is valid.
+ *
+ * Return: 0 on success, otherwise, 1
+ */
+int egress_pkey_check(struct hfi1_pportdata *ppd, u32 slid, u16 pkey,
+		      u8 sc5, int8_t s_pkey_index)
+{
+	struct hfi1_devdata *dd;
+	int i;
+	int is_user_ctxt_mechanism = (s_pkey_index < 0);
+
+	if (!(ppd->part_enforce & HFI1_PART_ENFORCE_OUT))
+		return 0;
+
+	/* If SC15, pkey[0:14] must be 0x7fff */
+	if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK))
+		goto bad;
+
+	/* Is the pkey = 0x0, or 0x8000? */
+	if ((pkey & PKEY_LOW_15_MASK) == 0)
+		goto bad;
+
+	/*
+	 * For the kernel contexts only, if a qp is passed into the function,
+	 * the most likely matching pkey has index qp->s_pkey_index
+	 */
+	if (!is_user_ctxt_mechanism &&
+	    egress_pkey_matches_entry(pkey, ppd->pkeys[s_pkey_index])) {
+		return 0;
+	}
+
+	for (i = 0; i < MAX_PKEY_VALUES; i++) {
+		if (egress_pkey_matches_entry(pkey, ppd->pkeys[i]))
+			return 0;
+	}
+bad:
+	/*
+	 * For the user-context mechanism, the P_KEY check would only happen
+	 * once per SDMA request, not once per packet.  Therefore, there's no
+	 * need to increment the counter for the user-context mechanism.
+	 */
+	if (!is_user_ctxt_mechanism) {
+		incr_cntr64(&ppd->port_xmit_constraint_errors);
+		dd = ppd->dd;
+		if (!(dd->err_info_xmit_constraint.status &
+		      OPA_EI_STATUS_SMASK)) {
+			dd->err_info_xmit_constraint.status |=
+				OPA_EI_STATUS_SMASK;
+			dd->err_info_xmit_constraint.slid = slid;
+			dd->err_info_xmit_constraint.pkey = pkey;
+		}
+	}
+	return 1;
+}
+
+/**
+ * get_send_routine - choose an egress routine
+ *
+ * Choose an egress routine based on QP type
+ * and size
+ */
+static inline send_routine get_send_routine(struct rvt_qp *qp,
+					    struct hfi1_pkt_state *ps)
+{
+	struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+	struct hfi1_qp_priv *priv = qp->priv;
+	struct verbs_txreq *tx = ps->s_txreq;
+
+	if (unlikely(!(dd->flags & HFI1_HAS_SEND_DMA)))
+		return dd->process_pio_send;
+	switch (qp->ibqp.qp_type) {
+	case IB_QPT_SMI:
+		return dd->process_pio_send;
+	case IB_QPT_GSI:
+	case IB_QPT_UD:
+		break;
+	case IB_QPT_UC:
+	case IB_QPT_RC: {
+		if (piothreshold &&
+		    tx->s_cur_size <= min(piothreshold, qp->pmtu) &&
+		    (BIT(ps->opcode & OPMASK) & pio_opmask[ps->opcode >> 5]) &&
+		    iowait_sdma_pending(&priv->s_iowait) == 0 &&
+		    !sdma_txreq_built(&tx->txreq))
+			return dd->process_pio_send;
+		break;
+	}
+	default:
+		break;
+	}
+	return dd->process_dma_send;
+}
+
+/**
+ * hfi1_verbs_send - send a packet
+ * @qp: the QP to send on
+ * @ps: the state of the packet to send
+ *
+ * Return zero if packet is sent or queued OK.
+ * Return non-zero and clear qp->s_flags RVT_S_BUSY otherwise.
+ */
+int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
+{
+	struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+	struct hfi1_qp_priv *priv = qp->priv;
+	struct ib_other_headers *ohdr = NULL;
+	send_routine sr;
+	int ret;
+	u16 pkey;
+	u32 slid;
+	u8 l4 = 0;
+
+	/* locate the pkey within the headers */
+	if (ps->s_txreq->phdr.hdr.hdr_type) {
+		struct hfi1_16b_header *hdr = &ps->s_txreq->phdr.hdr.opah;
+
+		l4 = hfi1_16B_get_l4(hdr);
+		if (l4 == OPA_16B_L4_IB_LOCAL)
+			ohdr = &hdr->u.oth;
+		else if (l4 == OPA_16B_L4_IB_GLOBAL)
+			ohdr = &hdr->u.l.oth;
+
+		slid = hfi1_16B_get_slid(hdr);
+		pkey = hfi1_16B_get_pkey(hdr);
+	} else {
+		struct ib_header *hdr = &ps->s_txreq->phdr.hdr.ibh;
+		u8 lnh = ib_get_lnh(hdr);
+
+		if (lnh == HFI1_LRH_GRH)
+			ohdr = &hdr->u.l.oth;
+		else
+			ohdr = &hdr->u.oth;
+		slid = ib_get_slid(hdr);
+		pkey = ib_bth_get_pkey(ohdr);
+	}
+
+	if (likely(l4 != OPA_16B_L4_FM))
+		ps->opcode = ib_bth_get_opcode(ohdr);
+	else
+		ps->opcode = IB_OPCODE_UD_SEND_ONLY;
+
+	sr = get_send_routine(qp, ps);
+	ret = egress_pkey_check(dd->pport, slid, pkey,
+				priv->s_sc, qp->s_pkey_index);
+	if (unlikely(ret)) {
+		/*
+		 * The value we are returning here does not get propagated to
+		 * the verbs caller. Thus we need to complete the request with
+		 * error otherwise the caller could be sitting waiting on the
+		 * completion event. Only do this for PIO. SDMA has its own
+		 * mechanism for handling the errors. So for SDMA we can just
+		 * return.
+		 */
+		if (sr == dd->process_pio_send) {
+			unsigned long flags;
+
+			hfi1_cdbg(PIO, "%s() Failed. Completing with err",
+				  __func__);
+			spin_lock_irqsave(&qp->s_lock, flags);
+			hfi1_send_complete(qp, qp->s_wqe, IB_WC_GENERAL_ERR);
+			spin_unlock_irqrestore(&qp->s_lock, flags);
+		}
+		return -EINVAL;
+	}
+	if (sr == dd->process_dma_send && iowait_pio_pending(&priv->s_iowait))
+		return pio_wait(qp,
+				ps->s_txreq->psc,
+				ps,
+				HFI1_S_WAIT_PIO_DRAIN);
+	return sr(qp, ps, 0);
+}
+
+/**
+ * hfi1_fill_device_attr - Fill in rvt dev info device attributes.
+ * @dd: the device data structure
+ */
+static void hfi1_fill_device_attr(struct hfi1_devdata *dd)
+{
+	struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
+	u32 ver = dd->dc8051_ver;
+
+	memset(&rdi->dparms.props, 0, sizeof(rdi->dparms.props));
+
+	rdi->dparms.props.fw_ver = ((u64)(dc8051_ver_maj(ver)) << 32) |
+		((u64)(dc8051_ver_min(ver)) << 16) |
+		(u64)dc8051_ver_patch(ver);
+
+	rdi->dparms.props.device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
+			IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
+			IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN |
+			IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE |
+			IB_DEVICE_MEM_MGT_EXTENSIONS |
+			IB_DEVICE_RDMA_NETDEV_OPA_VNIC;
+	rdi->dparms.props.page_size_cap = PAGE_SIZE;
+	rdi->dparms.props.vendor_id = dd->oui1 << 16 | dd->oui2 << 8 | dd->oui3;
+	rdi->dparms.props.vendor_part_id = dd->pcidev->device;
+	rdi->dparms.props.hw_ver = dd->minrev;
+	rdi->dparms.props.sys_image_guid = ib_hfi1_sys_image_guid;
+	rdi->dparms.props.max_mr_size = U64_MAX;
+	rdi->dparms.props.max_fast_reg_page_list_len = UINT_MAX;
+	rdi->dparms.props.max_qp = hfi1_max_qps;
+	rdi->dparms.props.max_qp_wr = hfi1_max_qp_wrs;
+	rdi->dparms.props.max_send_sge = hfi1_max_sges;
+	rdi->dparms.props.max_recv_sge = hfi1_max_sges;
+	rdi->dparms.props.max_sge_rd = hfi1_max_sges;
+	rdi->dparms.props.max_cq = hfi1_max_cqs;
+	rdi->dparms.props.max_ah = hfi1_max_ahs;
+	rdi->dparms.props.max_cqe = hfi1_max_cqes;
+	rdi->dparms.props.max_map_per_fmr = 32767;
+	rdi->dparms.props.max_pd = hfi1_max_pds;
+	rdi->dparms.props.max_qp_rd_atom = HFI1_MAX_RDMA_ATOMIC;
+	rdi->dparms.props.max_qp_init_rd_atom = 255;
+	rdi->dparms.props.max_srq = hfi1_max_srqs;
+	rdi->dparms.props.max_srq_wr = hfi1_max_srq_wrs;
+	rdi->dparms.props.max_srq_sge = hfi1_max_srq_sges;
+	rdi->dparms.props.atomic_cap = IB_ATOMIC_GLOB;
+	rdi->dparms.props.max_pkeys = hfi1_get_npkeys(dd);
+	rdi->dparms.props.max_mcast_grp = hfi1_max_mcast_grps;
+	rdi->dparms.props.max_mcast_qp_attach = hfi1_max_mcast_qp_attached;
+	rdi->dparms.props.max_total_mcast_qp_attach =
+					rdi->dparms.props.max_mcast_qp_attach *
+					rdi->dparms.props.max_mcast_grp;
+}
+
+static inline u16 opa_speed_to_ib(u16 in)
+{
+	u16 out = 0;
+
+	if (in & OPA_LINK_SPEED_25G)
+		out |= IB_SPEED_EDR;
+	if (in & OPA_LINK_SPEED_12_5G)
+		out |= IB_SPEED_FDR;
+
+	return out;
+}
+
+/*
+ * Convert a single OPA link width (no multiple flags) to an IB value.
+ * A zero OPA link width means link down, which means the IB width value
+ * is a don't care.
+ */
+static inline u16 opa_width_to_ib(u16 in)
+{
+	switch (in) {
+	case OPA_LINK_WIDTH_1X:
+	/* map 2x and 3x to 1x as they don't exist in IB */
+	case OPA_LINK_WIDTH_2X:
+	case OPA_LINK_WIDTH_3X:
+		return IB_WIDTH_1X;
+	default: /* link down or unknown, return our largest width */
+	case OPA_LINK_WIDTH_4X:
+		return IB_WIDTH_4X;
+	}
+}
+
+static int query_port(struct rvt_dev_info *rdi, u8 port_num,
+		      struct ib_port_attr *props)
+{
+	struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
+	struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
+	struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
+	u32 lid = ppd->lid;
+
+	/* props being zeroed by the caller, avoid zeroing it here */
+	props->lid = lid ? lid : 0;
+	props->lmc = ppd->lmc;
+	/* OPA logical states match IB logical states */
+	props->state = driver_lstate(ppd);
+	props->phys_state = driver_pstate(ppd);
+	props->gid_tbl_len = HFI1_GUIDS_PER_PORT;
+	props->active_width = (u8)opa_width_to_ib(ppd->link_width_active);
+	/* see rate_show() in ib core/sysfs.c */
+	props->active_speed = (u8)opa_speed_to_ib(ppd->link_speed_active);
+	props->max_vl_num = ppd->vls_supported;
+
+	/* Once we are a "first class" citizen and have added the OPA MTUs to
+	 * the core we can advertise the larger MTU enum to the ULPs, for now
+	 * advertise only 4K.
+	 *
+	 * Those applications which are either OPA aware or pass the MTU enum
+	 * from the Path Records to us will get the new 8k MTU.  Those that
+	 * attempt to process the MTU enum may fail in various ways.
+	 */
+	props->max_mtu = mtu_to_enum((!valid_ib_mtu(hfi1_max_mtu) ?
+				      4096 : hfi1_max_mtu), IB_MTU_4096);
+	props->active_mtu = !valid_ib_mtu(ppd->ibmtu) ? props->max_mtu :
+		mtu_to_enum(ppd->ibmtu, IB_MTU_4096);
+
+	return 0;
+}
+
+static int modify_device(struct ib_device *device,
+			 int device_modify_mask,
+			 struct ib_device_modify *device_modify)
+{
+	struct hfi1_devdata *dd = dd_from_ibdev(device);
+	unsigned i;
+	int ret;
+
+	if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
+				   IB_DEVICE_MODIFY_NODE_DESC)) {
+		ret = -EOPNOTSUPP;
+		goto bail;
+	}
+
+	if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) {
+		memcpy(device->node_desc, device_modify->node_desc,
+		       IB_DEVICE_NODE_DESC_MAX);
+		for (i = 0; i < dd->num_pports; i++) {
+			struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
+
+			hfi1_node_desc_chg(ibp);
+		}
+	}
+
+	if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
+		ib_hfi1_sys_image_guid =
+			cpu_to_be64(device_modify->sys_image_guid);
+		for (i = 0; i < dd->num_pports; i++) {
+			struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
+
+			hfi1_sys_guid_chg(ibp);
+		}
+	}
+
+	ret = 0;
+
+bail:
+	return ret;
+}
+
+static int shut_down_port(struct rvt_dev_info *rdi, u8 port_num)
+{
+	struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
+	struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
+	struct hfi1_pportdata *ppd = &dd->pport[port_num - 1];
+	int ret;
+
+	set_link_down_reason(ppd, OPA_LINKDOWN_REASON_UNKNOWN, 0,
+			     OPA_LINKDOWN_REASON_UNKNOWN);
+	ret = set_link_state(ppd, HLS_DN_DOWNDEF);
+	return ret;
+}
+
+static int hfi1_get_guid_be(struct rvt_dev_info *rdi, struct rvt_ibport *rvp,
+			    int guid_index, __be64 *guid)
+{
+	struct hfi1_ibport *ibp = container_of(rvp, struct hfi1_ibport, rvp);
+
+	if (guid_index >= HFI1_GUIDS_PER_PORT)
+		return -EINVAL;
+
+	*guid = get_sguid(ibp, guid_index);
+	return 0;
+}
+
+/*
+ * convert ah port,sl to sc
+ */
+u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah)
+{
+	struct hfi1_ibport *ibp = to_iport(ibdev, rdma_ah_get_port_num(ah));
+
+	return ibp->sl_to_sc[rdma_ah_get_sl(ah)];
+}
+
+static int hfi1_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr)
+{
+	struct hfi1_ibport *ibp;
+	struct hfi1_pportdata *ppd;
+	struct hfi1_devdata *dd;
+	u8 sc5;
+	u8 sl;
+
+	if (hfi1_check_mcast(rdma_ah_get_dlid(ah_attr)) &&
+	    !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
+		return -EINVAL;
+
+	/* test the mapping for validity */
+	ibp = to_iport(ibdev, rdma_ah_get_port_num(ah_attr));
+	ppd = ppd_from_ibp(ibp);
+	dd = dd_from_ppd(ppd);
+
+	sl = rdma_ah_get_sl(ah_attr);
+	if (sl >= ARRAY_SIZE(ibp->sl_to_sc))
+		return -EINVAL;
+	sl = array_index_nospec(sl, ARRAY_SIZE(ibp->sl_to_sc));
+
+	sc5 = ibp->sl_to_sc[sl];
+	if (sc_to_vlt(dd, sc5) > num_vls && sc_to_vlt(dd, sc5) != 0xf)
+		return -EINVAL;
+	return 0;
+}
+
+static void hfi1_notify_new_ah(struct ib_device *ibdev,
+			       struct rdma_ah_attr *ah_attr,
+			       struct rvt_ah *ah)
+{
+	struct hfi1_ibport *ibp;
+	struct hfi1_pportdata *ppd;
+	struct hfi1_devdata *dd;
+	u8 sc5;
+	struct rdma_ah_attr *attr = &ah->attr;
+
+	/*
+	 * Do not trust reading anything from rvt_ah at this point as it is not
+	 * done being setup. We can however modify things which we need to set.
+	 */
+
+	ibp = to_iport(ibdev, rdma_ah_get_port_num(ah_attr));
+	ppd = ppd_from_ibp(ibp);
+	sc5 = ibp->sl_to_sc[rdma_ah_get_sl(&ah->attr)];
+	hfi1_update_ah_attr(ibdev, attr);
+	hfi1_make_opa_lid(attr);
+	dd = dd_from_ppd(ppd);
+	ah->vl = sc_to_vlt(dd, sc5);
+	if (ah->vl < num_vls || ah->vl == 15)
+		ah->log_pmtu = ilog2(dd->vld[ah->vl].mtu);
+}
+
+/**
+ * hfi1_get_npkeys - return the size of the PKEY table for context 0
+ * @dd: the hfi1_ib device
+ */
+unsigned hfi1_get_npkeys(struct hfi1_devdata *dd)
+{
+	return ARRAY_SIZE(dd->pport[0].pkeys);
+}
+
+static void init_ibport(struct hfi1_pportdata *ppd)
+{
+	struct hfi1_ibport *ibp = &ppd->ibport_data;
+	size_t sz = ARRAY_SIZE(ibp->sl_to_sc);
+	int i;
+
+	for (i = 0; i < sz; i++) {
+		ibp->sl_to_sc[i] = i;
+		ibp->sc_to_sl[i] = i;
+	}
+
+	for (i = 0; i < RVT_MAX_TRAP_LISTS ; i++)
+		INIT_LIST_HEAD(&ibp->rvp.trap_lists[i].list);
+	timer_setup(&ibp->rvp.trap_timer, hfi1_handle_trap_timer, 0);
+
+	spin_lock_init(&ibp->rvp.lock);
+	/* Set the prefix to the default value (see ch. 4.1.1) */
+	ibp->rvp.gid_prefix = IB_DEFAULT_GID_PREFIX;
+	ibp->rvp.sm_lid = 0;
+	/*
+	 * Below should only set bits defined in OPA PortInfo.CapabilityMask
+	 * and PortInfo.CapabilityMask3
+	 */
+	ibp->rvp.port_cap_flags = IB_PORT_AUTO_MIGR_SUP |
+		IB_PORT_CAP_MASK_NOTICE_SUP;
+	ibp->rvp.port_cap3_flags = OPA_CAP_MASK3_IsSharedSpaceSupported;
+	ibp->rvp.pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
+	ibp->rvp.pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
+	ibp->rvp.pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
+	ibp->rvp.pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
+	ibp->rvp.pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;
+
+	RCU_INIT_POINTER(ibp->rvp.qp[0], NULL);
+	RCU_INIT_POINTER(ibp->rvp.qp[1], NULL);
+}
+
+static void hfi1_get_dev_fw_str(struct ib_device *ibdev, char *str)
+{
+	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
+	struct hfi1_ibdev *dev = dev_from_rdi(rdi);
+	u32 ver = dd_from_dev(dev)->dc8051_ver;
+
+	snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u.%u", dc8051_ver_maj(ver),
+		 dc8051_ver_min(ver), dc8051_ver_patch(ver));
+}
+
+static const char * const driver_cntr_names[] = {
+	/* must be element 0*/
+	"DRIVER_KernIntr",
+	"DRIVER_ErrorIntr",
+	"DRIVER_Tx_Errs",
+	"DRIVER_Rcv_Errs",
+	"DRIVER_HW_Errs",
+	"DRIVER_NoPIOBufs",
+	"DRIVER_CtxtsOpen",
+	"DRIVER_RcvLen_Errs",
+	"DRIVER_EgrBufFull",
+	"DRIVER_EgrHdrFull"
+};
+
+static DEFINE_MUTEX(cntr_names_lock); /* protects the *_cntr_names bufers */
+static const char **dev_cntr_names;
+static const char **port_cntr_names;
+int num_driver_cntrs = ARRAY_SIZE(driver_cntr_names);
+static int num_dev_cntrs;
+static int num_port_cntrs;
+static int cntr_names_initialized;
+
+/*
+ * Convert a list of names separated by '\n' into an array of NULL terminated
+ * strings. Optionally some entries can be reserved in the array to hold extra
+ * external strings.
+ */
+static int init_cntr_names(const char *names_in,
+			   const size_t names_len,
+			   int num_extra_names,
+			   int *num_cntrs,
+			   const char ***cntr_names)
+{
+	char *names_out, *p, **q;
+	int i, n;
+
+	n = 0;
+	for (i = 0; i < names_len; i++)
+		if (names_in[i] == '\n')
+			n++;
+
+	names_out = kmalloc((n + num_extra_names) * sizeof(char *) + names_len,
+			    GFP_KERNEL);
+	if (!names_out) {
+		*num_cntrs = 0;
+		*cntr_names = NULL;
+		return -ENOMEM;
+	}
+
+	p = names_out + (n + num_extra_names) * sizeof(char *);
+	memcpy(p, names_in, names_len);
+
+	q = (char **)names_out;
+	for (i = 0; i < n; i++) {
+		q[i] = p;
+		p = strchr(p, '\n');
+		*p++ = '\0';
+	}
+
+	*num_cntrs = n;
+	*cntr_names = (const char **)names_out;
+	return 0;
+}
+
+static struct rdma_hw_stats *alloc_hw_stats(struct ib_device *ibdev,
+					    u8 port_num)
+{
+	int i, err;
+
+	mutex_lock(&cntr_names_lock);
+	if (!cntr_names_initialized) {
+		struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+
+		err = init_cntr_names(dd->cntrnames,
+				      dd->cntrnameslen,
+				      num_driver_cntrs,
+				      &num_dev_cntrs,
+				      &dev_cntr_names);
+		if (err) {
+			mutex_unlock(&cntr_names_lock);
+			return NULL;
+		}
+
+		for (i = 0; i < num_driver_cntrs; i++)
+			dev_cntr_names[num_dev_cntrs + i] =
+				driver_cntr_names[i];
+
+		err = init_cntr_names(dd->portcntrnames,
+				      dd->portcntrnameslen,
+				      0,
+				      &num_port_cntrs,
+				      &port_cntr_names);
+		if (err) {
+			kfree(dev_cntr_names);
+			dev_cntr_names = NULL;
+			mutex_unlock(&cntr_names_lock);
+			return NULL;
+		}
+		cntr_names_initialized = 1;
+	}
+	mutex_unlock(&cntr_names_lock);
+
+	if (!port_num)
+		return rdma_alloc_hw_stats_struct(
+				dev_cntr_names,
+				num_dev_cntrs + num_driver_cntrs,
+				RDMA_HW_STATS_DEFAULT_LIFESPAN);
+	else
+		return rdma_alloc_hw_stats_struct(
+				port_cntr_names,
+				num_port_cntrs,
+				RDMA_HW_STATS_DEFAULT_LIFESPAN);
+}
+
+static u64 hfi1_sps_ints(void)
+{
+	unsigned long flags;
+	struct hfi1_devdata *dd;
+	u64 sps_ints = 0;
+
+	spin_lock_irqsave(&hfi1_devs_lock, flags);
+	list_for_each_entry(dd, &hfi1_dev_list, list) {
+		sps_ints += get_all_cpu_total(dd->int_counter);
+	}
+	spin_unlock_irqrestore(&hfi1_devs_lock, flags);
+	return sps_ints;
+}
+
+static int get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
+			u8 port, int index)
+{
+	u64 *values;
+	int count;
+
+	if (!port) {
+		u64 *stats = (u64 *)&hfi1_stats;
+		int i;
+
+		hfi1_read_cntrs(dd_from_ibdev(ibdev), NULL, &values);
+		values[num_dev_cntrs] = hfi1_sps_ints();
+		for (i = 1; i < num_driver_cntrs; i++)
+			values[num_dev_cntrs + i] = stats[i];
+		count = num_dev_cntrs + num_driver_cntrs;
+	} else {
+		struct hfi1_ibport *ibp = to_iport(ibdev, port);
+
+		hfi1_read_portcntrs(ppd_from_ibp(ibp), NULL, &values);
+		count = num_port_cntrs;
+	}
+
+	memcpy(stats->value, values, count * sizeof(u64));
+	return count;
+}
+
+/**
+ * hfi1_register_ib_device - register our device with the infiniband core
+ * @dd: the device data structure
+ * Return 0 if successful, errno if unsuccessful.
+ */
+int hfi1_register_ib_device(struct hfi1_devdata *dd)
+{
+	struct hfi1_ibdev *dev = &dd->verbs_dev;
+	struct ib_device *ibdev = &dev->rdi.ibdev;
+	struct hfi1_pportdata *ppd = dd->pport;
+	struct hfi1_ibport *ibp = &ppd->ibport_data;
+	unsigned i;
+	int ret;
+
+	for (i = 0; i < dd->num_pports; i++)
+		init_ibport(ppd + i);
+
+	/* Only need to initialize non-zero fields. */
+
+	timer_setup(&dev->mem_timer, mem_timer, 0);
+
+	seqlock_init(&dev->iowait_lock);
+	seqlock_init(&dev->txwait_lock);
+	INIT_LIST_HEAD(&dev->txwait);
+	INIT_LIST_HEAD(&dev->memwait);
+
+	ret = verbs_txreq_init(dev);
+	if (ret)
+		goto err_verbs_txreq;
+
+	/* Use first-port GUID as node guid */
+	ibdev->node_guid = get_sguid(ibp, HFI1_PORT_GUID_INDEX);
+
+	/*
+	 * The system image GUID is supposed to be the same for all
+	 * HFIs in a single system but since there can be other
+	 * device types in the system, we can't be sure this is unique.
+	 */
+	if (!ib_hfi1_sys_image_guid)
+		ib_hfi1_sys_image_guid = ibdev->node_guid;
+	ibdev->owner = THIS_MODULE;
+	ibdev->phys_port_cnt = dd->num_pports;
+	ibdev->dev.parent = &dd->pcidev->dev;
+	ibdev->modify_device = modify_device;
+	ibdev->alloc_hw_stats = alloc_hw_stats;
+	ibdev->get_hw_stats = get_hw_stats;
+	ibdev->alloc_rdma_netdev = hfi1_vnic_alloc_rn;
+
+	/* keep process mad in the driver */
+	ibdev->process_mad = hfi1_process_mad;
+	ibdev->get_dev_fw_str = hfi1_get_dev_fw_str;
+
+	strlcpy(ibdev->node_desc, init_utsname()->nodename,
+		sizeof(ibdev->node_desc));
+
+	/*
+	 * Fill in rvt info object.
+	 */
+	dd->verbs_dev.rdi.driver_f.port_callback = hfi1_create_port_files;
+	dd->verbs_dev.rdi.driver_f.get_pci_dev = get_pci_dev;
+	dd->verbs_dev.rdi.driver_f.check_ah = hfi1_check_ah;
+	dd->verbs_dev.rdi.driver_f.notify_new_ah = hfi1_notify_new_ah;
+	dd->verbs_dev.rdi.driver_f.get_guid_be = hfi1_get_guid_be;
+	dd->verbs_dev.rdi.driver_f.query_port_state = query_port;
+	dd->verbs_dev.rdi.driver_f.shut_down_port = shut_down_port;
+	dd->verbs_dev.rdi.driver_f.cap_mask_chg = hfi1_cap_mask_chg;
+	/*
+	 * Fill in rvt info device attributes.
+	 */
+	hfi1_fill_device_attr(dd);
+
+	/* queue pair */
+	dd->verbs_dev.rdi.dparms.qp_table_size = hfi1_qp_table_size;
+	dd->verbs_dev.rdi.dparms.qpn_start = 0;
+	dd->verbs_dev.rdi.dparms.qpn_inc = 1;
+	dd->verbs_dev.rdi.dparms.qos_shift = dd->qos_shift;
+	dd->verbs_dev.rdi.dparms.qpn_res_start = kdeth_qp << 16;
+	dd->verbs_dev.rdi.dparms.qpn_res_end =
+	dd->verbs_dev.rdi.dparms.qpn_res_start + 65535;
+	dd->verbs_dev.rdi.dparms.max_rdma_atomic = HFI1_MAX_RDMA_ATOMIC;
+	dd->verbs_dev.rdi.dparms.psn_mask = PSN_MASK;
+	dd->verbs_dev.rdi.dparms.psn_shift = PSN_SHIFT;
+	dd->verbs_dev.rdi.dparms.psn_modify_mask = PSN_MODIFY_MASK;
+	dd->verbs_dev.rdi.dparms.core_cap_flags = RDMA_CORE_PORT_INTEL_OPA |
+						RDMA_CORE_CAP_OPA_AH;
+	dd->verbs_dev.rdi.dparms.max_mad_size = OPA_MGMT_MAD_SIZE;
+
+	dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qp_priv_alloc;
+	dd->verbs_dev.rdi.driver_f.qp_priv_free = qp_priv_free;
+	dd->verbs_dev.rdi.driver_f.free_all_qps = free_all_qps;
+	dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset;
+	dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send_from_rvt;
+	dd->verbs_dev.rdi.driver_f.schedule_send = hfi1_schedule_send;
+	dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _hfi1_schedule_send;
+	dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = get_pmtu_from_attr;
+	dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
+	dd->verbs_dev.rdi.driver_f.flush_qp_waiters = flush_qp_waiters;
+	dd->verbs_dev.rdi.driver_f.stop_send_queue = stop_send_queue;
+	dd->verbs_dev.rdi.driver_f.quiesce_qp = quiesce_qp;
+	dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
+	dd->verbs_dev.rdi.driver_f.mtu_from_qp = mtu_from_qp;
+	dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = mtu_to_path_mtu;
+	dd->verbs_dev.rdi.driver_f.check_modify_qp = hfi1_check_modify_qp;
+	dd->verbs_dev.rdi.driver_f.modify_qp = hfi1_modify_qp;
+	dd->verbs_dev.rdi.driver_f.notify_restart_rc = hfi1_restart_rc;
+	dd->verbs_dev.rdi.driver_f.check_send_wqe = hfi1_check_send_wqe;
+	dd->verbs_dev.rdi.driver_f.comp_vect_cpu_lookup =
+						hfi1_comp_vect_mappings_lookup;
+
+	/* completeion queue */
+	dd->verbs_dev.rdi.ibdev.num_comp_vectors = dd->comp_vect_possible_cpus;
+	dd->verbs_dev.rdi.dparms.node = dd->node;
+
+	/* misc settings */
+	dd->verbs_dev.rdi.flags = 0; /* Let rdmavt handle it all */
+	dd->verbs_dev.rdi.dparms.lkey_table_size = hfi1_lkey_table_size;
+	dd->verbs_dev.rdi.dparms.nports = dd->num_pports;
+	dd->verbs_dev.rdi.dparms.npkeys = hfi1_get_npkeys(dd);
+
+	/* post send table */
+	dd->verbs_dev.rdi.post_parms = hfi1_post_parms;
+
+	ppd = dd->pport;
+	for (i = 0; i < dd->num_pports; i++, ppd++)
+		rvt_init_port(&dd->verbs_dev.rdi,
+			      &ppd->ibport_data.rvp,
+			      i,
+			      ppd->pkeys);
+
+	ret = rvt_register_device(&dd->verbs_dev.rdi, RDMA_DRIVER_HFI1);
+	if (ret)
+		goto err_verbs_txreq;
+
+	ret = hfi1_verbs_register_sysfs(dd);
+	if (ret)
+		goto err_class;
+
+	return ret;
+
+err_class:
+	rvt_unregister_device(&dd->verbs_dev.rdi);
+err_verbs_txreq:
+	verbs_txreq_exit(dev);
+	dd_dev_err(dd, "cannot register verbs: %d!\n", -ret);
+	return ret;
+}
+
+void hfi1_unregister_ib_device(struct hfi1_devdata *dd)
+{
+	struct hfi1_ibdev *dev = &dd->verbs_dev;
+
+	hfi1_verbs_unregister_sysfs(dd);
+
+	rvt_unregister_device(&dd->verbs_dev.rdi);
+
+	if (!list_empty(&dev->txwait))
+		dd_dev_err(dd, "txwait list not empty!\n");
+	if (!list_empty(&dev->memwait))
+		dd_dev_err(dd, "memwait list not empty!\n");
+
+	del_timer_sync(&dev->mem_timer);
+	verbs_txreq_exit(dev);
+
+	mutex_lock(&cntr_names_lock);
+	kfree(dev_cntr_names);
+	kfree(port_cntr_names);
+	dev_cntr_names = NULL;
+	port_cntr_names = NULL;
+	cntr_names_initialized = 0;
+	mutex_unlock(&cntr_names_lock);
+}
+
+void hfi1_cnp_rcv(struct hfi1_packet *packet)
+{
+	struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
+	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+	struct ib_header *hdr = packet->hdr;
+	struct rvt_qp *qp = packet->qp;
+	u32 lqpn, rqpn = 0;
+	u16 rlid = 0;
+	u8 sl, sc5, svc_type;
+
+	switch (packet->qp->ibqp.qp_type) {
+	case IB_QPT_UC:
+		rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
+		rqpn = qp->remote_qpn;
+		svc_type = IB_CC_SVCTYPE_UC;
+		break;
+	case IB_QPT_RC:
+		rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
+		rqpn = qp->remote_qpn;
+		svc_type = IB_CC_SVCTYPE_RC;
+		break;
+	case IB_QPT_SMI:
+	case IB_QPT_GSI:
+	case IB_QPT_UD:
+		svc_type = IB_CC_SVCTYPE_UD;
+		break;
+	default:
+		ibp->rvp.n_pkt_drops++;
+		return;
+	}
+
+	sc5 = hfi1_9B_get_sc5(hdr, packet->rhf);
+	sl = ibp->sc_to_sl[sc5];
+	lqpn = qp->ibqp.qp_num;
+
+	process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
+}