mirror of https://gitee.com/openkylin/linux.git
1384 lines
34 KiB
C
1384 lines
34 KiB
C
/*
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* Copyright (c) 2012, 2013 Intel Corporation. All rights reserved.
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* Copyright (c) 2006 - 2012 QLogic Corporation. * All rights reserved.
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* Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/err.h>
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#include <linux/vmalloc.h>
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#include <linux/jhash.h>
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#ifdef CONFIG_DEBUG_FS
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#include <linux/seq_file.h>
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#endif
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#include "qib.h"
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#define BITS_PER_PAGE (PAGE_SIZE*BITS_PER_BYTE)
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#define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
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static inline unsigned mk_qpn(struct qib_qpn_table *qpt,
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struct qpn_map *map, unsigned off)
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{
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return (map - qpt->map) * BITS_PER_PAGE + off;
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}
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static inline unsigned find_next_offset(struct qib_qpn_table *qpt,
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struct qpn_map *map, unsigned off,
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unsigned n)
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{
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if (qpt->mask) {
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off++;
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if (((off & qpt->mask) >> 1) >= n)
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off = (off | qpt->mask) + 2;
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} else
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off = find_next_zero_bit(map->page, BITS_PER_PAGE, off);
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return off;
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}
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/*
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* Convert the AETH credit code into the number of credits.
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*/
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static u32 credit_table[31] = {
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0, /* 0 */
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1, /* 1 */
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2, /* 2 */
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3, /* 3 */
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4, /* 4 */
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6, /* 5 */
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8, /* 6 */
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12, /* 7 */
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16, /* 8 */
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24, /* 9 */
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32, /* A */
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48, /* B */
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64, /* C */
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96, /* D */
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128, /* E */
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192, /* F */
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256, /* 10 */
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384, /* 11 */
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512, /* 12 */
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768, /* 13 */
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1024, /* 14 */
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1536, /* 15 */
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2048, /* 16 */
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3072, /* 17 */
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4096, /* 18 */
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6144, /* 19 */
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8192, /* 1A */
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12288, /* 1B */
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16384, /* 1C */
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24576, /* 1D */
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32768 /* 1E */
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};
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static void get_map_page(struct qib_qpn_table *qpt, struct qpn_map *map)
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{
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unsigned long page = get_zeroed_page(GFP_KERNEL);
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/*
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* Free the page if someone raced with us installing it.
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*/
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spin_lock(&qpt->lock);
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if (map->page)
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free_page(page);
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else
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map->page = (void *)page;
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spin_unlock(&qpt->lock);
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}
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/*
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* Allocate the next available QPN or
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* zero/one for QP type IB_QPT_SMI/IB_QPT_GSI.
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*/
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static int alloc_qpn(struct qib_devdata *dd, struct qib_qpn_table *qpt,
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enum ib_qp_type type, u8 port)
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{
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u32 i, offset, max_scan, qpn;
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struct qpn_map *map;
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u32 ret;
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if (type == IB_QPT_SMI || type == IB_QPT_GSI) {
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unsigned n;
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ret = type == IB_QPT_GSI;
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n = 1 << (ret + 2 * (port - 1));
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spin_lock(&qpt->lock);
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if (qpt->flags & n)
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ret = -EINVAL;
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else
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qpt->flags |= n;
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spin_unlock(&qpt->lock);
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goto bail;
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}
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qpn = qpt->last + 2;
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if (qpn >= QPN_MAX)
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qpn = 2;
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if (qpt->mask && ((qpn & qpt->mask) >> 1) >= dd->n_krcv_queues)
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qpn = (qpn | qpt->mask) + 2;
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offset = qpn & BITS_PER_PAGE_MASK;
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map = &qpt->map[qpn / BITS_PER_PAGE];
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max_scan = qpt->nmaps - !offset;
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for (i = 0;;) {
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if (unlikely(!map->page)) {
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get_map_page(qpt, map);
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if (unlikely(!map->page))
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break;
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}
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do {
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if (!test_and_set_bit(offset, map->page)) {
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qpt->last = qpn;
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ret = qpn;
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goto bail;
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}
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offset = find_next_offset(qpt, map, offset,
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dd->n_krcv_queues);
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qpn = mk_qpn(qpt, map, offset);
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/*
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* This test differs from alloc_pidmap().
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* If find_next_offset() does find a zero
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* bit, we don't need to check for QPN
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* wrapping around past our starting QPN.
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* We just need to be sure we don't loop
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* forever.
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*/
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} while (offset < BITS_PER_PAGE && qpn < QPN_MAX);
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/*
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* In order to keep the number of pages allocated to a
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* minimum, we scan the all existing pages before increasing
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* the size of the bitmap table.
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*/
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if (++i > max_scan) {
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if (qpt->nmaps == QPNMAP_ENTRIES)
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break;
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map = &qpt->map[qpt->nmaps++];
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offset = 0;
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} else if (map < &qpt->map[qpt->nmaps]) {
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++map;
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offset = 0;
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} else {
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map = &qpt->map[0];
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offset = 2;
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}
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qpn = mk_qpn(qpt, map, offset);
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}
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ret = -ENOMEM;
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bail:
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return ret;
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}
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static void free_qpn(struct qib_qpn_table *qpt, u32 qpn)
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{
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struct qpn_map *map;
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map = qpt->map + qpn / BITS_PER_PAGE;
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if (map->page)
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clear_bit(qpn & BITS_PER_PAGE_MASK, map->page);
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}
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static inline unsigned qpn_hash(struct qib_ibdev *dev, u32 qpn)
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{
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return jhash_1word(qpn, dev->qp_rnd) &
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(dev->qp_table_size - 1);
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}
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/*
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* Put the QP into the hash table.
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* The hash table holds a reference to the QP.
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*/
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static void insert_qp(struct qib_ibdev *dev, struct qib_qp *qp)
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{
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struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
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unsigned long flags;
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unsigned n = qpn_hash(dev, qp->ibqp.qp_num);
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atomic_inc(&qp->refcount);
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spin_lock_irqsave(&dev->qpt_lock, flags);
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if (qp->ibqp.qp_num == 0)
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rcu_assign_pointer(ibp->qp0, qp);
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else if (qp->ibqp.qp_num == 1)
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rcu_assign_pointer(ibp->qp1, qp);
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else {
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qp->next = dev->qp_table[n];
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rcu_assign_pointer(dev->qp_table[n], qp);
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}
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spin_unlock_irqrestore(&dev->qpt_lock, flags);
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}
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/*
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* Remove the QP from the table so it can't be found asynchronously by
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* the receive interrupt routine.
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*/
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static void remove_qp(struct qib_ibdev *dev, struct qib_qp *qp)
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{
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struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
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unsigned n = qpn_hash(dev, qp->ibqp.qp_num);
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unsigned long flags;
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int removed = 1;
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spin_lock_irqsave(&dev->qpt_lock, flags);
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if (rcu_dereference_protected(ibp->qp0,
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lockdep_is_held(&dev->qpt_lock)) == qp) {
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rcu_assign_pointer(ibp->qp0, NULL);
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} else if (rcu_dereference_protected(ibp->qp1,
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lockdep_is_held(&dev->qpt_lock)) == qp) {
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rcu_assign_pointer(ibp->qp1, NULL);
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} else {
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struct qib_qp *q;
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struct qib_qp __rcu **qpp;
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removed = 0;
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qpp = &dev->qp_table[n];
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for (; (q = rcu_dereference_protected(*qpp,
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lockdep_is_held(&dev->qpt_lock))) != NULL;
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qpp = &q->next)
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if (q == qp) {
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rcu_assign_pointer(*qpp,
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rcu_dereference_protected(qp->next,
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lockdep_is_held(&dev->qpt_lock)));
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removed = 1;
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break;
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}
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}
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spin_unlock_irqrestore(&dev->qpt_lock, flags);
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if (removed) {
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synchronize_rcu();
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atomic_dec(&qp->refcount);
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}
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}
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/**
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* qib_free_all_qps - check for QPs still in use
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* @qpt: the QP table to empty
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*
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* There should not be any QPs still in use.
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* Free memory for table.
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*/
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unsigned qib_free_all_qps(struct qib_devdata *dd)
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{
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struct qib_ibdev *dev = &dd->verbs_dev;
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unsigned long flags;
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struct qib_qp *qp;
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unsigned n, qp_inuse = 0;
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for (n = 0; n < dd->num_pports; n++) {
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struct qib_ibport *ibp = &dd->pport[n].ibport_data;
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if (!qib_mcast_tree_empty(ibp))
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qp_inuse++;
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rcu_read_lock();
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if (rcu_dereference(ibp->qp0))
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qp_inuse++;
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if (rcu_dereference(ibp->qp1))
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qp_inuse++;
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rcu_read_unlock();
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}
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spin_lock_irqsave(&dev->qpt_lock, flags);
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for (n = 0; n < dev->qp_table_size; n++) {
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qp = rcu_dereference_protected(dev->qp_table[n],
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lockdep_is_held(&dev->qpt_lock));
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rcu_assign_pointer(dev->qp_table[n], NULL);
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for (; qp; qp = rcu_dereference_protected(qp->next,
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lockdep_is_held(&dev->qpt_lock)))
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qp_inuse++;
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}
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spin_unlock_irqrestore(&dev->qpt_lock, flags);
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synchronize_rcu();
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return qp_inuse;
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}
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/**
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* qib_lookup_qpn - return the QP with the given QPN
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* @qpt: the QP table
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* @qpn: the QP number to look up
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*
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* The caller is responsible for decrementing the QP reference count
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* when done.
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*/
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struct qib_qp *qib_lookup_qpn(struct qib_ibport *ibp, u32 qpn)
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{
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struct qib_qp *qp = NULL;
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rcu_read_lock();
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if (unlikely(qpn <= 1)) {
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if (qpn == 0)
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qp = rcu_dereference(ibp->qp0);
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else
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qp = rcu_dereference(ibp->qp1);
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if (qp)
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atomic_inc(&qp->refcount);
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} else {
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struct qib_ibdev *dev = &ppd_from_ibp(ibp)->dd->verbs_dev;
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unsigned n = qpn_hash(dev, qpn);
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for (qp = rcu_dereference(dev->qp_table[n]); qp;
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qp = rcu_dereference(qp->next))
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if (qp->ibqp.qp_num == qpn) {
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atomic_inc(&qp->refcount);
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break;
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}
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}
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rcu_read_unlock();
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return qp;
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}
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/**
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* qib_reset_qp - initialize the QP state to the reset state
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* @qp: the QP to reset
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* @type: the QP type
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*/
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static void qib_reset_qp(struct qib_qp *qp, enum ib_qp_type type)
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{
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qp->remote_qpn = 0;
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qp->qkey = 0;
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qp->qp_access_flags = 0;
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atomic_set(&qp->s_dma_busy, 0);
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qp->s_flags &= QIB_S_SIGNAL_REQ_WR;
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qp->s_hdrwords = 0;
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qp->s_wqe = NULL;
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qp->s_draining = 0;
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qp->s_next_psn = 0;
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qp->s_last_psn = 0;
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qp->s_sending_psn = 0;
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qp->s_sending_hpsn = 0;
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qp->s_psn = 0;
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qp->r_psn = 0;
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qp->r_msn = 0;
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if (type == IB_QPT_RC) {
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qp->s_state = IB_OPCODE_RC_SEND_LAST;
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qp->r_state = IB_OPCODE_RC_SEND_LAST;
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} else {
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qp->s_state = IB_OPCODE_UC_SEND_LAST;
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qp->r_state = IB_OPCODE_UC_SEND_LAST;
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}
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qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
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qp->r_nak_state = 0;
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qp->r_aflags = 0;
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qp->r_flags = 0;
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qp->s_head = 0;
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qp->s_tail = 0;
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qp->s_cur = 0;
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qp->s_acked = 0;
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qp->s_last = 0;
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qp->s_ssn = 1;
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qp->s_lsn = 0;
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qp->s_mig_state = IB_MIG_MIGRATED;
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memset(qp->s_ack_queue, 0, sizeof(qp->s_ack_queue));
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qp->r_head_ack_queue = 0;
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qp->s_tail_ack_queue = 0;
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qp->s_num_rd_atomic = 0;
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if (qp->r_rq.wq) {
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qp->r_rq.wq->head = 0;
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qp->r_rq.wq->tail = 0;
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}
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qp->r_sge.num_sge = 0;
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}
|
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|
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static void clear_mr_refs(struct qib_qp *qp, int clr_sends)
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{
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unsigned n;
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if (test_and_clear_bit(QIB_R_REWIND_SGE, &qp->r_aflags))
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qib_put_ss(&qp->s_rdma_read_sge);
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qib_put_ss(&qp->r_sge);
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if (clr_sends) {
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while (qp->s_last != qp->s_head) {
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struct qib_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
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unsigned i;
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|
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for (i = 0; i < wqe->wr.num_sge; i++) {
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struct qib_sge *sge = &wqe->sg_list[i];
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|
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qib_put_mr(sge->mr);
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}
|
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if (qp->ibqp.qp_type == IB_QPT_UD ||
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qp->ibqp.qp_type == IB_QPT_SMI ||
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qp->ibqp.qp_type == IB_QPT_GSI)
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atomic_dec(&to_iah(wqe->wr.wr.ud.ah)->refcount);
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if (++qp->s_last >= qp->s_size)
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qp->s_last = 0;
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}
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if (qp->s_rdma_mr) {
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qib_put_mr(qp->s_rdma_mr);
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qp->s_rdma_mr = NULL;
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}
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}
|
|
|
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if (qp->ibqp.qp_type != IB_QPT_RC)
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return;
|
|
|
|
for (n = 0; n < ARRAY_SIZE(qp->s_ack_queue); n++) {
|
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struct qib_ack_entry *e = &qp->s_ack_queue[n];
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|
|
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if (e->opcode == IB_OPCODE_RC_RDMA_READ_REQUEST &&
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e->rdma_sge.mr) {
|
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qib_put_mr(e->rdma_sge.mr);
|
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e->rdma_sge.mr = NULL;
|
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}
|
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}
|
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}
|
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|
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/**
|
|
* qib_error_qp - put a QP into the error state
|
|
* @qp: the QP to put into the error state
|
|
* @err: the receive completion error to signal if a RWQE is active
|
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*
|
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* Flushes both send and receive work queues.
|
|
* Returns true if last WQE event should be generated.
|
|
* The QP r_lock and s_lock should be held and interrupts disabled.
|
|
* If we are already in error state, just return.
|
|
*/
|
|
int qib_error_qp(struct qib_qp *qp, enum ib_wc_status err)
|
|
{
|
|
struct qib_ibdev *dev = to_idev(qp->ibqp.device);
|
|
struct ib_wc wc;
|
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int ret = 0;
|
|
|
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if (qp->state == IB_QPS_ERR || qp->state == IB_QPS_RESET)
|
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goto bail;
|
|
|
|
qp->state = IB_QPS_ERR;
|
|
|
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if (qp->s_flags & (QIB_S_TIMER | QIB_S_WAIT_RNR)) {
|
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qp->s_flags &= ~(QIB_S_TIMER | QIB_S_WAIT_RNR);
|
|
del_timer(&qp->s_timer);
|
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}
|
|
|
|
if (qp->s_flags & QIB_S_ANY_WAIT_SEND)
|
|
qp->s_flags &= ~QIB_S_ANY_WAIT_SEND;
|
|
|
|
spin_lock(&dev->pending_lock);
|
|
if (!list_empty(&qp->iowait) && !(qp->s_flags & QIB_S_BUSY)) {
|
|
qp->s_flags &= ~QIB_S_ANY_WAIT_IO;
|
|
list_del_init(&qp->iowait);
|
|
}
|
|
spin_unlock(&dev->pending_lock);
|
|
|
|
if (!(qp->s_flags & QIB_S_BUSY)) {
|
|
qp->s_hdrwords = 0;
|
|
if (qp->s_rdma_mr) {
|
|
qib_put_mr(qp->s_rdma_mr);
|
|
qp->s_rdma_mr = NULL;
|
|
}
|
|
if (qp->s_tx) {
|
|
qib_put_txreq(qp->s_tx);
|
|
qp->s_tx = NULL;
|
|
}
|
|
}
|
|
|
|
/* Schedule the sending tasklet to drain the send work queue. */
|
|
if (qp->s_last != qp->s_head)
|
|
qib_schedule_send(qp);
|
|
|
|
clear_mr_refs(qp, 0);
|
|
|
|
memset(&wc, 0, sizeof(wc));
|
|
wc.qp = &qp->ibqp;
|
|
wc.opcode = IB_WC_RECV;
|
|
|
|
if (test_and_clear_bit(QIB_R_WRID_VALID, &qp->r_aflags)) {
|
|
wc.wr_id = qp->r_wr_id;
|
|
wc.status = err;
|
|
qib_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
|
|
}
|
|
wc.status = IB_WC_WR_FLUSH_ERR;
|
|
|
|
if (qp->r_rq.wq) {
|
|
struct qib_rwq *wq;
|
|
u32 head;
|
|
u32 tail;
|
|
|
|
spin_lock(&qp->r_rq.lock);
|
|
|
|
/* sanity check pointers before trusting them */
|
|
wq = qp->r_rq.wq;
|
|
head = wq->head;
|
|
if (head >= qp->r_rq.size)
|
|
head = 0;
|
|
tail = wq->tail;
|
|
if (tail >= qp->r_rq.size)
|
|
tail = 0;
|
|
while (tail != head) {
|
|
wc.wr_id = get_rwqe_ptr(&qp->r_rq, tail)->wr_id;
|
|
if (++tail >= qp->r_rq.size)
|
|
tail = 0;
|
|
qib_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
|
|
}
|
|
wq->tail = tail;
|
|
|
|
spin_unlock(&qp->r_rq.lock);
|
|
} else if (qp->ibqp.event_handler)
|
|
ret = 1;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qib_modify_qp - modify the attributes of a queue pair
|
|
* @ibqp: the queue pair who's attributes we're modifying
|
|
* @attr: the new attributes
|
|
* @attr_mask: the mask of attributes to modify
|
|
* @udata: user data for libibverbs.so
|
|
*
|
|
* Returns 0 on success, otherwise returns an errno.
|
|
*/
|
|
int qib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
|
|
int attr_mask, struct ib_udata *udata)
|
|
{
|
|
struct qib_ibdev *dev = to_idev(ibqp->device);
|
|
struct qib_qp *qp = to_iqp(ibqp);
|
|
enum ib_qp_state cur_state, new_state;
|
|
struct ib_event ev;
|
|
int lastwqe = 0;
|
|
int mig = 0;
|
|
int ret;
|
|
u32 pmtu = 0; /* for gcc warning only */
|
|
|
|
spin_lock_irq(&qp->r_lock);
|
|
spin_lock(&qp->s_lock);
|
|
|
|
cur_state = attr_mask & IB_QP_CUR_STATE ?
|
|
attr->cur_qp_state : qp->state;
|
|
new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
|
|
|
|
if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
|
|
attr_mask))
|
|
goto inval;
|
|
|
|
if (attr_mask & IB_QP_AV) {
|
|
if (attr->ah_attr.dlid >= QIB_MULTICAST_LID_BASE)
|
|
goto inval;
|
|
if (qib_check_ah(qp->ibqp.device, &attr->ah_attr))
|
|
goto inval;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_ALT_PATH) {
|
|
if (attr->alt_ah_attr.dlid >= QIB_MULTICAST_LID_BASE)
|
|
goto inval;
|
|
if (qib_check_ah(qp->ibqp.device, &attr->alt_ah_attr))
|
|
goto inval;
|
|
if (attr->alt_pkey_index >= qib_get_npkeys(dd_from_dev(dev)))
|
|
goto inval;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_PKEY_INDEX)
|
|
if (attr->pkey_index >= qib_get_npkeys(dd_from_dev(dev)))
|
|
goto inval;
|
|
|
|
if (attr_mask & IB_QP_MIN_RNR_TIMER)
|
|
if (attr->min_rnr_timer > 31)
|
|
goto inval;
|
|
|
|
if (attr_mask & IB_QP_PORT)
|
|
if (qp->ibqp.qp_type == IB_QPT_SMI ||
|
|
qp->ibqp.qp_type == IB_QPT_GSI ||
|
|
attr->port_num == 0 ||
|
|
attr->port_num > ibqp->device->phys_port_cnt)
|
|
goto inval;
|
|
|
|
if (attr_mask & IB_QP_DEST_QPN)
|
|
if (attr->dest_qp_num > QIB_QPN_MASK)
|
|
goto inval;
|
|
|
|
if (attr_mask & IB_QP_RETRY_CNT)
|
|
if (attr->retry_cnt > 7)
|
|
goto inval;
|
|
|
|
if (attr_mask & IB_QP_RNR_RETRY)
|
|
if (attr->rnr_retry > 7)
|
|
goto inval;
|
|
|
|
/*
|
|
* Don't allow invalid path_mtu values. OK to set greater
|
|
* than the active mtu (or even the max_cap, if we have tuned
|
|
* that to a small mtu. We'll set qp->path_mtu
|
|
* to the lesser of requested attribute mtu and active,
|
|
* for packetizing messages.
|
|
* Note that the QP port has to be set in INIT and MTU in RTR.
|
|
*/
|
|
if (attr_mask & IB_QP_PATH_MTU) {
|
|
struct qib_devdata *dd = dd_from_dev(dev);
|
|
int mtu, pidx = qp->port_num - 1;
|
|
|
|
mtu = ib_mtu_enum_to_int(attr->path_mtu);
|
|
if (mtu == -1)
|
|
goto inval;
|
|
if (mtu > dd->pport[pidx].ibmtu) {
|
|
switch (dd->pport[pidx].ibmtu) {
|
|
case 4096:
|
|
pmtu = IB_MTU_4096;
|
|
break;
|
|
case 2048:
|
|
pmtu = IB_MTU_2048;
|
|
break;
|
|
case 1024:
|
|
pmtu = IB_MTU_1024;
|
|
break;
|
|
case 512:
|
|
pmtu = IB_MTU_512;
|
|
break;
|
|
case 256:
|
|
pmtu = IB_MTU_256;
|
|
break;
|
|
default:
|
|
pmtu = IB_MTU_2048;
|
|
}
|
|
} else
|
|
pmtu = attr->path_mtu;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_PATH_MIG_STATE) {
|
|
if (attr->path_mig_state == IB_MIG_REARM) {
|
|
if (qp->s_mig_state == IB_MIG_ARMED)
|
|
goto inval;
|
|
if (new_state != IB_QPS_RTS)
|
|
goto inval;
|
|
} else if (attr->path_mig_state == IB_MIG_MIGRATED) {
|
|
if (qp->s_mig_state == IB_MIG_REARM)
|
|
goto inval;
|
|
if (new_state != IB_QPS_RTS && new_state != IB_QPS_SQD)
|
|
goto inval;
|
|
if (qp->s_mig_state == IB_MIG_ARMED)
|
|
mig = 1;
|
|
} else
|
|
goto inval;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
|
|
if (attr->max_dest_rd_atomic > QIB_MAX_RDMA_ATOMIC)
|
|
goto inval;
|
|
|
|
switch (new_state) {
|
|
case IB_QPS_RESET:
|
|
if (qp->state != IB_QPS_RESET) {
|
|
qp->state = IB_QPS_RESET;
|
|
spin_lock(&dev->pending_lock);
|
|
if (!list_empty(&qp->iowait))
|
|
list_del_init(&qp->iowait);
|
|
spin_unlock(&dev->pending_lock);
|
|
qp->s_flags &= ~(QIB_S_TIMER | QIB_S_ANY_WAIT);
|
|
spin_unlock(&qp->s_lock);
|
|
spin_unlock_irq(&qp->r_lock);
|
|
/* Stop the sending work queue and retry timer */
|
|
cancel_work_sync(&qp->s_work);
|
|
del_timer_sync(&qp->s_timer);
|
|
wait_event(qp->wait_dma, !atomic_read(&qp->s_dma_busy));
|
|
if (qp->s_tx) {
|
|
qib_put_txreq(qp->s_tx);
|
|
qp->s_tx = NULL;
|
|
}
|
|
remove_qp(dev, qp);
|
|
wait_event(qp->wait, !atomic_read(&qp->refcount));
|
|
spin_lock_irq(&qp->r_lock);
|
|
spin_lock(&qp->s_lock);
|
|
clear_mr_refs(qp, 1);
|
|
qib_reset_qp(qp, ibqp->qp_type);
|
|
}
|
|
break;
|
|
|
|
case IB_QPS_RTR:
|
|
/* Allow event to retrigger if QP set to RTR more than once */
|
|
qp->r_flags &= ~QIB_R_COMM_EST;
|
|
qp->state = new_state;
|
|
break;
|
|
|
|
case IB_QPS_SQD:
|
|
qp->s_draining = qp->s_last != qp->s_cur;
|
|
qp->state = new_state;
|
|
break;
|
|
|
|
case IB_QPS_SQE:
|
|
if (qp->ibqp.qp_type == IB_QPT_RC)
|
|
goto inval;
|
|
qp->state = new_state;
|
|
break;
|
|
|
|
case IB_QPS_ERR:
|
|
lastwqe = qib_error_qp(qp, IB_WC_WR_FLUSH_ERR);
|
|
break;
|
|
|
|
default:
|
|
qp->state = new_state;
|
|
break;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_PKEY_INDEX)
|
|
qp->s_pkey_index = attr->pkey_index;
|
|
|
|
if (attr_mask & IB_QP_PORT)
|
|
qp->port_num = attr->port_num;
|
|
|
|
if (attr_mask & IB_QP_DEST_QPN)
|
|
qp->remote_qpn = attr->dest_qp_num;
|
|
|
|
if (attr_mask & IB_QP_SQ_PSN) {
|
|
qp->s_next_psn = attr->sq_psn & QIB_PSN_MASK;
|
|
qp->s_psn = qp->s_next_psn;
|
|
qp->s_sending_psn = qp->s_next_psn;
|
|
qp->s_last_psn = qp->s_next_psn - 1;
|
|
qp->s_sending_hpsn = qp->s_last_psn;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_RQ_PSN)
|
|
qp->r_psn = attr->rq_psn & QIB_PSN_MASK;
|
|
|
|
if (attr_mask & IB_QP_ACCESS_FLAGS)
|
|
qp->qp_access_flags = attr->qp_access_flags;
|
|
|
|
if (attr_mask & IB_QP_AV) {
|
|
qp->remote_ah_attr = attr->ah_attr;
|
|
qp->s_srate = attr->ah_attr.static_rate;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_ALT_PATH) {
|
|
qp->alt_ah_attr = attr->alt_ah_attr;
|
|
qp->s_alt_pkey_index = attr->alt_pkey_index;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_PATH_MIG_STATE) {
|
|
qp->s_mig_state = attr->path_mig_state;
|
|
if (mig) {
|
|
qp->remote_ah_attr = qp->alt_ah_attr;
|
|
qp->port_num = qp->alt_ah_attr.port_num;
|
|
qp->s_pkey_index = qp->s_alt_pkey_index;
|
|
}
|
|
}
|
|
|
|
if (attr_mask & IB_QP_PATH_MTU) {
|
|
qp->path_mtu = pmtu;
|
|
qp->pmtu = ib_mtu_enum_to_int(pmtu);
|
|
}
|
|
|
|
if (attr_mask & IB_QP_RETRY_CNT) {
|
|
qp->s_retry_cnt = attr->retry_cnt;
|
|
qp->s_retry = attr->retry_cnt;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_RNR_RETRY) {
|
|
qp->s_rnr_retry_cnt = attr->rnr_retry;
|
|
qp->s_rnr_retry = attr->rnr_retry;
|
|
}
|
|
|
|
if (attr_mask & IB_QP_MIN_RNR_TIMER)
|
|
qp->r_min_rnr_timer = attr->min_rnr_timer;
|
|
|
|
if (attr_mask & IB_QP_TIMEOUT) {
|
|
qp->timeout = attr->timeout;
|
|
qp->timeout_jiffies =
|
|
usecs_to_jiffies((4096UL * (1UL << qp->timeout)) /
|
|
1000UL);
|
|
}
|
|
|
|
if (attr_mask & IB_QP_QKEY)
|
|
qp->qkey = attr->qkey;
|
|
|
|
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
|
|
qp->r_max_rd_atomic = attr->max_dest_rd_atomic;
|
|
|
|
if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
|
|
qp->s_max_rd_atomic = attr->max_rd_atomic;
|
|
|
|
spin_unlock(&qp->s_lock);
|
|
spin_unlock_irq(&qp->r_lock);
|
|
|
|
if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
|
|
insert_qp(dev, qp);
|
|
|
|
if (lastwqe) {
|
|
ev.device = qp->ibqp.device;
|
|
ev.element.qp = &qp->ibqp;
|
|
ev.event = IB_EVENT_QP_LAST_WQE_REACHED;
|
|
qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
|
|
}
|
|
if (mig) {
|
|
ev.device = qp->ibqp.device;
|
|
ev.element.qp = &qp->ibqp;
|
|
ev.event = IB_EVENT_PATH_MIG;
|
|
qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
|
|
}
|
|
ret = 0;
|
|
goto bail;
|
|
|
|
inval:
|
|
spin_unlock(&qp->s_lock);
|
|
spin_unlock_irq(&qp->r_lock);
|
|
ret = -EINVAL;
|
|
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
int qib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
|
|
int attr_mask, struct ib_qp_init_attr *init_attr)
|
|
{
|
|
struct qib_qp *qp = to_iqp(ibqp);
|
|
|
|
attr->qp_state = qp->state;
|
|
attr->cur_qp_state = attr->qp_state;
|
|
attr->path_mtu = qp->path_mtu;
|
|
attr->path_mig_state = qp->s_mig_state;
|
|
attr->qkey = qp->qkey;
|
|
attr->rq_psn = qp->r_psn & QIB_PSN_MASK;
|
|
attr->sq_psn = qp->s_next_psn & QIB_PSN_MASK;
|
|
attr->dest_qp_num = qp->remote_qpn;
|
|
attr->qp_access_flags = qp->qp_access_flags;
|
|
attr->cap.max_send_wr = qp->s_size - 1;
|
|
attr->cap.max_recv_wr = qp->ibqp.srq ? 0 : qp->r_rq.size - 1;
|
|
attr->cap.max_send_sge = qp->s_max_sge;
|
|
attr->cap.max_recv_sge = qp->r_rq.max_sge;
|
|
attr->cap.max_inline_data = 0;
|
|
attr->ah_attr = qp->remote_ah_attr;
|
|
attr->alt_ah_attr = qp->alt_ah_attr;
|
|
attr->pkey_index = qp->s_pkey_index;
|
|
attr->alt_pkey_index = qp->s_alt_pkey_index;
|
|
attr->en_sqd_async_notify = 0;
|
|
attr->sq_draining = qp->s_draining;
|
|
attr->max_rd_atomic = qp->s_max_rd_atomic;
|
|
attr->max_dest_rd_atomic = qp->r_max_rd_atomic;
|
|
attr->min_rnr_timer = qp->r_min_rnr_timer;
|
|
attr->port_num = qp->port_num;
|
|
attr->timeout = qp->timeout;
|
|
attr->retry_cnt = qp->s_retry_cnt;
|
|
attr->rnr_retry = qp->s_rnr_retry_cnt;
|
|
attr->alt_port_num = qp->alt_ah_attr.port_num;
|
|
attr->alt_timeout = qp->alt_timeout;
|
|
|
|
init_attr->event_handler = qp->ibqp.event_handler;
|
|
init_attr->qp_context = qp->ibqp.qp_context;
|
|
init_attr->send_cq = qp->ibqp.send_cq;
|
|
init_attr->recv_cq = qp->ibqp.recv_cq;
|
|
init_attr->srq = qp->ibqp.srq;
|
|
init_attr->cap = attr->cap;
|
|
if (qp->s_flags & QIB_S_SIGNAL_REQ_WR)
|
|
init_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
|
|
else
|
|
init_attr->sq_sig_type = IB_SIGNAL_ALL_WR;
|
|
init_attr->qp_type = qp->ibqp.qp_type;
|
|
init_attr->port_num = qp->port_num;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* qib_compute_aeth - compute the AETH (syndrome + MSN)
|
|
* @qp: the queue pair to compute the AETH for
|
|
*
|
|
* Returns the AETH.
|
|
*/
|
|
__be32 qib_compute_aeth(struct qib_qp *qp)
|
|
{
|
|
u32 aeth = qp->r_msn & QIB_MSN_MASK;
|
|
|
|
if (qp->ibqp.srq) {
|
|
/*
|
|
* Shared receive queues don't generate credits.
|
|
* Set the credit field to the invalid value.
|
|
*/
|
|
aeth |= QIB_AETH_CREDIT_INVAL << QIB_AETH_CREDIT_SHIFT;
|
|
} else {
|
|
u32 min, max, x;
|
|
u32 credits;
|
|
struct qib_rwq *wq = qp->r_rq.wq;
|
|
u32 head;
|
|
u32 tail;
|
|
|
|
/* sanity check pointers before trusting them */
|
|
head = wq->head;
|
|
if (head >= qp->r_rq.size)
|
|
head = 0;
|
|
tail = wq->tail;
|
|
if (tail >= qp->r_rq.size)
|
|
tail = 0;
|
|
/*
|
|
* Compute the number of credits available (RWQEs).
|
|
* XXX Not holding the r_rq.lock here so there is a small
|
|
* chance that the pair of reads are not atomic.
|
|
*/
|
|
credits = head - tail;
|
|
if ((int)credits < 0)
|
|
credits += qp->r_rq.size;
|
|
/*
|
|
* Binary search the credit table to find the code to
|
|
* use.
|
|
*/
|
|
min = 0;
|
|
max = 31;
|
|
for (;;) {
|
|
x = (min + max) / 2;
|
|
if (credit_table[x] == credits)
|
|
break;
|
|
if (credit_table[x] > credits)
|
|
max = x;
|
|
else if (min == x)
|
|
break;
|
|
else
|
|
min = x;
|
|
}
|
|
aeth |= x << QIB_AETH_CREDIT_SHIFT;
|
|
}
|
|
return cpu_to_be32(aeth);
|
|
}
|
|
|
|
/**
|
|
* qib_create_qp - create a queue pair for a device
|
|
* @ibpd: the protection domain who's device we create the queue pair for
|
|
* @init_attr: the attributes of the queue pair
|
|
* @udata: user data for libibverbs.so
|
|
*
|
|
* Returns the queue pair on success, otherwise returns an errno.
|
|
*
|
|
* Called by the ib_create_qp() core verbs function.
|
|
*/
|
|
struct ib_qp *qib_create_qp(struct ib_pd *ibpd,
|
|
struct ib_qp_init_attr *init_attr,
|
|
struct ib_udata *udata)
|
|
{
|
|
struct qib_qp *qp;
|
|
int err;
|
|
struct qib_swqe *swq = NULL;
|
|
struct qib_ibdev *dev;
|
|
struct qib_devdata *dd;
|
|
size_t sz;
|
|
size_t sg_list_sz;
|
|
struct ib_qp *ret;
|
|
|
|
if (init_attr->cap.max_send_sge > ib_qib_max_sges ||
|
|
init_attr->cap.max_send_wr > ib_qib_max_qp_wrs) {
|
|
ret = ERR_PTR(-EINVAL);
|
|
goto bail;
|
|
}
|
|
|
|
/* Check receive queue parameters if no SRQ is specified. */
|
|
if (!init_attr->srq) {
|
|
if (init_attr->cap.max_recv_sge > ib_qib_max_sges ||
|
|
init_attr->cap.max_recv_wr > ib_qib_max_qp_wrs) {
|
|
ret = ERR_PTR(-EINVAL);
|
|
goto bail;
|
|
}
|
|
if (init_attr->cap.max_send_sge +
|
|
init_attr->cap.max_send_wr +
|
|
init_attr->cap.max_recv_sge +
|
|
init_attr->cap.max_recv_wr == 0) {
|
|
ret = ERR_PTR(-EINVAL);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
switch (init_attr->qp_type) {
|
|
case IB_QPT_SMI:
|
|
case IB_QPT_GSI:
|
|
if (init_attr->port_num == 0 ||
|
|
init_attr->port_num > ibpd->device->phys_port_cnt) {
|
|
ret = ERR_PTR(-EINVAL);
|
|
goto bail;
|
|
}
|
|
case IB_QPT_UC:
|
|
case IB_QPT_RC:
|
|
case IB_QPT_UD:
|
|
sz = sizeof(struct qib_sge) *
|
|
init_attr->cap.max_send_sge +
|
|
sizeof(struct qib_swqe);
|
|
swq = vmalloc((init_attr->cap.max_send_wr + 1) * sz);
|
|
if (swq == NULL) {
|
|
ret = ERR_PTR(-ENOMEM);
|
|
goto bail;
|
|
}
|
|
sz = sizeof(*qp);
|
|
sg_list_sz = 0;
|
|
if (init_attr->srq) {
|
|
struct qib_srq *srq = to_isrq(init_attr->srq);
|
|
|
|
if (srq->rq.max_sge > 1)
|
|
sg_list_sz = sizeof(*qp->r_sg_list) *
|
|
(srq->rq.max_sge - 1);
|
|
} else if (init_attr->cap.max_recv_sge > 1)
|
|
sg_list_sz = sizeof(*qp->r_sg_list) *
|
|
(init_attr->cap.max_recv_sge - 1);
|
|
qp = kzalloc(sz + sg_list_sz, GFP_KERNEL);
|
|
if (!qp) {
|
|
ret = ERR_PTR(-ENOMEM);
|
|
goto bail_swq;
|
|
}
|
|
RCU_INIT_POINTER(qp->next, NULL);
|
|
qp->s_hdr = kzalloc(sizeof(*qp->s_hdr), GFP_KERNEL);
|
|
if (!qp->s_hdr) {
|
|
ret = ERR_PTR(-ENOMEM);
|
|
goto bail_qp;
|
|
}
|
|
qp->timeout_jiffies =
|
|
usecs_to_jiffies((4096UL * (1UL << qp->timeout)) /
|
|
1000UL);
|
|
if (init_attr->srq)
|
|
sz = 0;
|
|
else {
|
|
qp->r_rq.size = init_attr->cap.max_recv_wr + 1;
|
|
qp->r_rq.max_sge = init_attr->cap.max_recv_sge;
|
|
sz = (sizeof(struct ib_sge) * qp->r_rq.max_sge) +
|
|
sizeof(struct qib_rwqe);
|
|
qp->r_rq.wq = vmalloc_user(sizeof(struct qib_rwq) +
|
|
qp->r_rq.size * sz);
|
|
if (!qp->r_rq.wq) {
|
|
ret = ERR_PTR(-ENOMEM);
|
|
goto bail_qp;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ib_create_qp() will initialize qp->ibqp
|
|
* except for qp->ibqp.qp_num.
|
|
*/
|
|
spin_lock_init(&qp->r_lock);
|
|
spin_lock_init(&qp->s_lock);
|
|
spin_lock_init(&qp->r_rq.lock);
|
|
atomic_set(&qp->refcount, 0);
|
|
init_waitqueue_head(&qp->wait);
|
|
init_waitqueue_head(&qp->wait_dma);
|
|
init_timer(&qp->s_timer);
|
|
qp->s_timer.data = (unsigned long)qp;
|
|
INIT_WORK(&qp->s_work, qib_do_send);
|
|
INIT_LIST_HEAD(&qp->iowait);
|
|
INIT_LIST_HEAD(&qp->rspwait);
|
|
qp->state = IB_QPS_RESET;
|
|
qp->s_wq = swq;
|
|
qp->s_size = init_attr->cap.max_send_wr + 1;
|
|
qp->s_max_sge = init_attr->cap.max_send_sge;
|
|
if (init_attr->sq_sig_type == IB_SIGNAL_REQ_WR)
|
|
qp->s_flags = QIB_S_SIGNAL_REQ_WR;
|
|
dev = to_idev(ibpd->device);
|
|
dd = dd_from_dev(dev);
|
|
err = alloc_qpn(dd, &dev->qpn_table, init_attr->qp_type,
|
|
init_attr->port_num);
|
|
if (err < 0) {
|
|
ret = ERR_PTR(err);
|
|
vfree(qp->r_rq.wq);
|
|
goto bail_qp;
|
|
}
|
|
qp->ibqp.qp_num = err;
|
|
qp->port_num = init_attr->port_num;
|
|
qib_reset_qp(qp, init_attr->qp_type);
|
|
break;
|
|
|
|
default:
|
|
/* Don't support raw QPs */
|
|
ret = ERR_PTR(-ENOSYS);
|
|
goto bail;
|
|
}
|
|
|
|
init_attr->cap.max_inline_data = 0;
|
|
|
|
/*
|
|
* Return the address of the RWQ as the offset to mmap.
|
|
* See qib_mmap() for details.
|
|
*/
|
|
if (udata && udata->outlen >= sizeof(__u64)) {
|
|
if (!qp->r_rq.wq) {
|
|
__u64 offset = 0;
|
|
|
|
err = ib_copy_to_udata(udata, &offset,
|
|
sizeof(offset));
|
|
if (err) {
|
|
ret = ERR_PTR(err);
|
|
goto bail_ip;
|
|
}
|
|
} else {
|
|
u32 s = sizeof(struct qib_rwq) + qp->r_rq.size * sz;
|
|
|
|
qp->ip = qib_create_mmap_info(dev, s,
|
|
ibpd->uobject->context,
|
|
qp->r_rq.wq);
|
|
if (!qp->ip) {
|
|
ret = ERR_PTR(-ENOMEM);
|
|
goto bail_ip;
|
|
}
|
|
|
|
err = ib_copy_to_udata(udata, &(qp->ip->offset),
|
|
sizeof(qp->ip->offset));
|
|
if (err) {
|
|
ret = ERR_PTR(err);
|
|
goto bail_ip;
|
|
}
|
|
}
|
|
}
|
|
|
|
spin_lock(&dev->n_qps_lock);
|
|
if (dev->n_qps_allocated == ib_qib_max_qps) {
|
|
spin_unlock(&dev->n_qps_lock);
|
|
ret = ERR_PTR(-ENOMEM);
|
|
goto bail_ip;
|
|
}
|
|
|
|
dev->n_qps_allocated++;
|
|
spin_unlock(&dev->n_qps_lock);
|
|
|
|
if (qp->ip) {
|
|
spin_lock_irq(&dev->pending_lock);
|
|
list_add(&qp->ip->pending_mmaps, &dev->pending_mmaps);
|
|
spin_unlock_irq(&dev->pending_lock);
|
|
}
|
|
|
|
ret = &qp->ibqp;
|
|
goto bail;
|
|
|
|
bail_ip:
|
|
if (qp->ip)
|
|
kref_put(&qp->ip->ref, qib_release_mmap_info);
|
|
else
|
|
vfree(qp->r_rq.wq);
|
|
free_qpn(&dev->qpn_table, qp->ibqp.qp_num);
|
|
bail_qp:
|
|
kfree(qp->s_hdr);
|
|
kfree(qp);
|
|
bail_swq:
|
|
vfree(swq);
|
|
bail:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qib_destroy_qp - destroy a queue pair
|
|
* @ibqp: the queue pair to destroy
|
|
*
|
|
* Returns 0 on success.
|
|
*
|
|
* Note that this can be called while the QP is actively sending or
|
|
* receiving!
|
|
*/
|
|
int qib_destroy_qp(struct ib_qp *ibqp)
|
|
{
|
|
struct qib_qp *qp = to_iqp(ibqp);
|
|
struct qib_ibdev *dev = to_idev(ibqp->device);
|
|
|
|
/* Make sure HW and driver activity is stopped. */
|
|
spin_lock_irq(&qp->s_lock);
|
|
if (qp->state != IB_QPS_RESET) {
|
|
qp->state = IB_QPS_RESET;
|
|
spin_lock(&dev->pending_lock);
|
|
if (!list_empty(&qp->iowait))
|
|
list_del_init(&qp->iowait);
|
|
spin_unlock(&dev->pending_lock);
|
|
qp->s_flags &= ~(QIB_S_TIMER | QIB_S_ANY_WAIT);
|
|
spin_unlock_irq(&qp->s_lock);
|
|
cancel_work_sync(&qp->s_work);
|
|
del_timer_sync(&qp->s_timer);
|
|
wait_event(qp->wait_dma, !atomic_read(&qp->s_dma_busy));
|
|
if (qp->s_tx) {
|
|
qib_put_txreq(qp->s_tx);
|
|
qp->s_tx = NULL;
|
|
}
|
|
remove_qp(dev, qp);
|
|
wait_event(qp->wait, !atomic_read(&qp->refcount));
|
|
clear_mr_refs(qp, 1);
|
|
} else
|
|
spin_unlock_irq(&qp->s_lock);
|
|
|
|
/* all user's cleaned up, mark it available */
|
|
free_qpn(&dev->qpn_table, qp->ibqp.qp_num);
|
|
spin_lock(&dev->n_qps_lock);
|
|
dev->n_qps_allocated--;
|
|
spin_unlock(&dev->n_qps_lock);
|
|
|
|
if (qp->ip)
|
|
kref_put(&qp->ip->ref, qib_release_mmap_info);
|
|
else
|
|
vfree(qp->r_rq.wq);
|
|
vfree(qp->s_wq);
|
|
kfree(qp->s_hdr);
|
|
kfree(qp);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* qib_init_qpn_table - initialize the QP number table for a device
|
|
* @qpt: the QPN table
|
|
*/
|
|
void qib_init_qpn_table(struct qib_devdata *dd, struct qib_qpn_table *qpt)
|
|
{
|
|
spin_lock_init(&qpt->lock);
|
|
qpt->last = 1; /* start with QPN 2 */
|
|
qpt->nmaps = 1;
|
|
qpt->mask = dd->qpn_mask;
|
|
}
|
|
|
|
/**
|
|
* qib_free_qpn_table - free the QP number table for a device
|
|
* @qpt: the QPN table
|
|
*/
|
|
void qib_free_qpn_table(struct qib_qpn_table *qpt)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(qpt->map); i++)
|
|
if (qpt->map[i].page)
|
|
free_page((unsigned long) qpt->map[i].page);
|
|
}
|
|
|
|
/**
|
|
* qib_get_credit - flush the send work queue of a QP
|
|
* @qp: the qp who's send work queue to flush
|
|
* @aeth: the Acknowledge Extended Transport Header
|
|
*
|
|
* The QP s_lock should be held.
|
|
*/
|
|
void qib_get_credit(struct qib_qp *qp, u32 aeth)
|
|
{
|
|
u32 credit = (aeth >> QIB_AETH_CREDIT_SHIFT) & QIB_AETH_CREDIT_MASK;
|
|
|
|
/*
|
|
* If the credit is invalid, we can send
|
|
* as many packets as we like. Otherwise, we have to
|
|
* honor the credit field.
|
|
*/
|
|
if (credit == QIB_AETH_CREDIT_INVAL) {
|
|
if (!(qp->s_flags & QIB_S_UNLIMITED_CREDIT)) {
|
|
qp->s_flags |= QIB_S_UNLIMITED_CREDIT;
|
|
if (qp->s_flags & QIB_S_WAIT_SSN_CREDIT) {
|
|
qp->s_flags &= ~QIB_S_WAIT_SSN_CREDIT;
|
|
qib_schedule_send(qp);
|
|
}
|
|
}
|
|
} else if (!(qp->s_flags & QIB_S_UNLIMITED_CREDIT)) {
|
|
/* Compute new LSN (i.e., MSN + credit) */
|
|
credit = (aeth + credit_table[credit]) & QIB_MSN_MASK;
|
|
if (qib_cmp24(credit, qp->s_lsn) > 0) {
|
|
qp->s_lsn = credit;
|
|
if (qp->s_flags & QIB_S_WAIT_SSN_CREDIT) {
|
|
qp->s_flags &= ~QIB_S_WAIT_SSN_CREDIT;
|
|
qib_schedule_send(qp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
struct qib_qp_iter {
|
|
struct qib_ibdev *dev;
|
|
struct qib_qp *qp;
|
|
int n;
|
|
};
|
|
|
|
struct qib_qp_iter *qib_qp_iter_init(struct qib_ibdev *dev)
|
|
{
|
|
struct qib_qp_iter *iter;
|
|
|
|
iter = kzalloc(sizeof(*iter), GFP_KERNEL);
|
|
if (!iter)
|
|
return NULL;
|
|
|
|
iter->dev = dev;
|
|
if (qib_qp_iter_next(iter)) {
|
|
kfree(iter);
|
|
return NULL;
|
|
}
|
|
|
|
return iter;
|
|
}
|
|
|
|
int qib_qp_iter_next(struct qib_qp_iter *iter)
|
|
{
|
|
struct qib_ibdev *dev = iter->dev;
|
|
int n = iter->n;
|
|
int ret = 1;
|
|
struct qib_qp *pqp = iter->qp;
|
|
struct qib_qp *qp;
|
|
|
|
rcu_read_lock();
|
|
for (; n < dev->qp_table_size; n++) {
|
|
if (pqp)
|
|
qp = rcu_dereference(pqp->next);
|
|
else
|
|
qp = rcu_dereference(dev->qp_table[n]);
|
|
pqp = qp;
|
|
if (qp) {
|
|
if (iter->qp)
|
|
atomic_dec(&iter->qp->refcount);
|
|
atomic_inc(&qp->refcount);
|
|
rcu_read_unlock();
|
|
iter->qp = qp;
|
|
iter->n = n;
|
|
return 0;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
if (iter->qp)
|
|
atomic_dec(&iter->qp->refcount);
|
|
return ret;
|
|
}
|
|
|
|
static const char * const qp_type_str[] = {
|
|
"SMI", "GSI", "RC", "UC", "UD",
|
|
};
|
|
|
|
void qib_qp_iter_print(struct seq_file *s, struct qib_qp_iter *iter)
|
|
{
|
|
struct qib_swqe *wqe;
|
|
struct qib_qp *qp = iter->qp;
|
|
|
|
wqe = get_swqe_ptr(qp, qp->s_last);
|
|
seq_printf(s,
|
|
"N %d QP%u %s %u %u %u f=%x %u %u %u %u %u PSN %x %x %x %x %x (%u %u %u %u %u %u) QP%u LID %x\n",
|
|
iter->n,
|
|
qp->ibqp.qp_num,
|
|
qp_type_str[qp->ibqp.qp_type],
|
|
qp->state,
|
|
wqe->wr.opcode,
|
|
qp->s_hdrwords,
|
|
qp->s_flags,
|
|
atomic_read(&qp->s_dma_busy),
|
|
!list_empty(&qp->iowait),
|
|
qp->timeout,
|
|
wqe->ssn,
|
|
qp->s_lsn,
|
|
qp->s_last_psn,
|
|
qp->s_psn, qp->s_next_psn,
|
|
qp->s_sending_psn, qp->s_sending_hpsn,
|
|
qp->s_last, qp->s_acked, qp->s_cur,
|
|
qp->s_tail, qp->s_head, qp->s_size,
|
|
qp->remote_qpn,
|
|
qp->remote_ah_attr.dlid);
|
|
}
|
|
|
|
#endif
|