455 lines
11 KiB
C
455 lines
11 KiB
C
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/*
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* Copyright (c) 2012 - 2019 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 <rdma/rdma_vt.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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static inline unsigned mk_qpn(struct rvt_qpn_table *qpt,
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struct rvt_qpn_map *map, unsigned off)
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{
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return (map - qpt->map) * RVT_BITS_PER_PAGE + off;
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}
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static inline unsigned find_next_offset(struct rvt_qpn_table *qpt,
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struct rvt_qpn_map *map, unsigned off,
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unsigned n, u16 qpt_mask)
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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, RVT_BITS_PER_PAGE, off);
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}
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return off;
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}
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const struct rvt_operation_params qib_post_parms[RVT_OPERATION_MAX] = {
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[IB_WR_RDMA_WRITE] = {
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.length = sizeof(struct ib_rdma_wr),
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.qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC),
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},
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[IB_WR_RDMA_READ] = {
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.length = sizeof(struct ib_rdma_wr),
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.qpt_support = BIT(IB_QPT_RC),
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.flags = RVT_OPERATION_ATOMIC,
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},
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[IB_WR_ATOMIC_CMP_AND_SWP] = {
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.length = sizeof(struct ib_atomic_wr),
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.qpt_support = BIT(IB_QPT_RC),
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.flags = RVT_OPERATION_ATOMIC | RVT_OPERATION_ATOMIC_SGE,
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},
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[IB_WR_ATOMIC_FETCH_AND_ADD] = {
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.length = sizeof(struct ib_atomic_wr),
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.qpt_support = BIT(IB_QPT_RC),
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.flags = RVT_OPERATION_ATOMIC | RVT_OPERATION_ATOMIC_SGE,
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},
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[IB_WR_RDMA_WRITE_WITH_IMM] = {
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.length = sizeof(struct ib_rdma_wr),
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.qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC),
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},
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[IB_WR_SEND] = {
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.length = sizeof(struct ib_send_wr),
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.qpt_support = BIT(IB_QPT_UD) | BIT(IB_QPT_SMI) | BIT(IB_QPT_GSI) |
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BIT(IB_QPT_UC) | BIT(IB_QPT_RC),
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},
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[IB_WR_SEND_WITH_IMM] = {
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.length = sizeof(struct ib_send_wr),
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.qpt_support = BIT(IB_QPT_UD) | BIT(IB_QPT_SMI) | BIT(IB_QPT_GSI) |
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BIT(IB_QPT_UC) | BIT(IB_QPT_RC),
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},
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};
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static void get_map_page(struct rvt_qpn_table *qpt, struct rvt_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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int qib_alloc_qpn(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt,
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enum ib_qp_type type, u32 port)
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{
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u32 i, offset, max_scan, qpn;
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struct rvt_qpn_map *map;
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u32 ret;
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struct qib_ibdev *verbs_dev = container_of(rdi, struct qib_ibdev, rdi);
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struct qib_devdata *dd = container_of(verbs_dev, struct qib_devdata,
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verbs_dev);
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u16 qpt_mask = dd->qpn_mask;
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if (type == IB_QPT_SMI || type == IB_QPT_GSI) {
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u32 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 >= RVT_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 & RVT_BITS_PER_PAGE_MASK;
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map = &qpt->map[qpn / RVT_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, qpt_mask);
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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 < RVT_BITS_PER_PAGE && qpn < RVT_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 == RVT_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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/*
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* qib_free_all_qps - check for QPs still in use
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*/
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unsigned qib_free_all_qps(struct rvt_dev_info *rdi)
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{
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struct qib_ibdev *verbs_dev = container_of(rdi, struct qib_ibdev, rdi);
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struct qib_devdata *dd = container_of(verbs_dev, struct qib_devdata,
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verbs_dev);
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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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rcu_read_lock();
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if (rcu_dereference(ibp->rvp.qp[0]))
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qp_inuse++;
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if (rcu_dereference(ibp->rvp.qp[1]))
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qp_inuse++;
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rcu_read_unlock();
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}
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return qp_inuse;
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}
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void qib_notify_qp_reset(struct rvt_qp *qp)
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{
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struct qib_qp_priv *priv = qp->priv;
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atomic_set(&priv->s_dma_busy, 0);
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}
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void qib_notify_error_qp(struct rvt_qp *qp)
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{
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struct qib_qp_priv *priv = qp->priv;
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struct qib_ibdev *dev = to_idev(qp->ibqp.device);
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spin_lock(&dev->rdi.pending_lock);
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if (!list_empty(&priv->iowait) && !(qp->s_flags & RVT_S_BUSY)) {
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qp->s_flags &= ~RVT_S_ANY_WAIT_IO;
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list_del_init(&priv->iowait);
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}
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spin_unlock(&dev->rdi.pending_lock);
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if (!(qp->s_flags & RVT_S_BUSY)) {
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qp->s_hdrwords = 0;
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if (qp->s_rdma_mr) {
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rvt_put_mr(qp->s_rdma_mr);
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qp->s_rdma_mr = NULL;
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}
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if (priv->s_tx) {
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qib_put_txreq(priv->s_tx);
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priv->s_tx = NULL;
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}
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}
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}
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static int mtu_to_enum(u32 mtu)
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{
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int enum_mtu;
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switch (mtu) {
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case 4096:
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enum_mtu = IB_MTU_4096;
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break;
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case 2048:
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enum_mtu = IB_MTU_2048;
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break;
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case 1024:
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enum_mtu = IB_MTU_1024;
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break;
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case 512:
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enum_mtu = IB_MTU_512;
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break;
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case 256:
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enum_mtu = IB_MTU_256;
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break;
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default:
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enum_mtu = IB_MTU_2048;
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}
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return enum_mtu;
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}
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int qib_get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp,
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struct ib_qp_attr *attr)
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{
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int mtu, pmtu, pidx = qp->port_num - 1;
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struct qib_ibdev *verbs_dev = container_of(rdi, struct qib_ibdev, rdi);
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struct qib_devdata *dd = container_of(verbs_dev, struct qib_devdata,
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verbs_dev);
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mtu = ib_mtu_enum_to_int(attr->path_mtu);
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if (mtu == -1)
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return -EINVAL;
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if (mtu > dd->pport[pidx].ibmtu)
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pmtu = mtu_to_enum(dd->pport[pidx].ibmtu);
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else
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pmtu = attr->path_mtu;
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return pmtu;
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}
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int qib_mtu_to_path_mtu(u32 mtu)
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{
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return mtu_to_enum(mtu);
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}
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u32 qib_mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu)
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{
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return ib_mtu_enum_to_int(pmtu);
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}
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void *qib_qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp)
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{
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struct qib_qp_priv *priv;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return ERR_PTR(-ENOMEM);
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priv->owner = qp;
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priv->s_hdr = kzalloc(sizeof(*priv->s_hdr), GFP_KERNEL);
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if (!priv->s_hdr) {
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kfree(priv);
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return ERR_PTR(-ENOMEM);
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}
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init_waitqueue_head(&priv->wait_dma);
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INIT_WORK(&priv->s_work, _qib_do_send);
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INIT_LIST_HEAD(&priv->iowait);
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return priv;
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}
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void qib_qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp)
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{
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struct qib_qp_priv *priv = qp->priv;
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kfree(priv->s_hdr);
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kfree(priv);
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}
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void qib_stop_send_queue(struct rvt_qp *qp)
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{
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struct qib_qp_priv *priv = qp->priv;
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cancel_work_sync(&priv->s_work);
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}
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void qib_quiesce_qp(struct rvt_qp *qp)
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{
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struct qib_qp_priv *priv = qp->priv;
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wait_event(priv->wait_dma, !atomic_read(&priv->s_dma_busy));
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if (priv->s_tx) {
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|
|
qib_put_txreq(priv->s_tx);
|
||
|
|
priv->s_tx = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void qib_flush_qp_waiters(struct rvt_qp *qp)
|
||
|
|
{
|
||
|
|
struct qib_qp_priv *priv = qp->priv;
|
||
|
|
struct qib_ibdev *dev = to_idev(qp->ibqp.device);
|
||
|
|
|
||
|
|
spin_lock(&dev->rdi.pending_lock);
|
||
|
|
if (!list_empty(&priv->iowait))
|
||
|
|
list_del_init(&priv->iowait);
|
||
|
|
spin_unlock(&dev->rdi.pending_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* qib_check_send_wqe - validate wr/wqe
|
||
|
|
* @qp: The qp
|
||
|
|
* @wqe: The built wqe
|
||
|
|
* @call_send: Determine if the send should be posted or scheduled
|
||
|
|
*
|
||
|
|
* Returns 0 on success, -EINVAL on failure
|
||
|
|
*/
|
||
|
|
int qib_check_send_wqe(struct rvt_qp *qp,
|
||
|
|
struct rvt_swqe *wqe, bool *call_send)
|
||
|
|
{
|
||
|
|
struct rvt_ah *ah;
|
||
|
|
|
||
|
|
switch (qp->ibqp.qp_type) {
|
||
|
|
case IB_QPT_RC:
|
||
|
|
case IB_QPT_UC:
|
||
|
|
if (wqe->length > 0x80000000U)
|
||
|
|
return -EINVAL;
|
||
|
|
if (wqe->length > qp->pmtu)
|
||
|
|
*call_send = false;
|
||
|
|
break;
|
||
|
|
case IB_QPT_SMI:
|
||
|
|
case IB_QPT_GSI:
|
||
|
|
case IB_QPT_UD:
|
||
|
|
ah = rvt_get_swqe_ah(wqe);
|
||
|
|
if (wqe->length > (1 << ah->log_pmtu))
|
||
|
|
return -EINVAL;
|
||
|
|
/* progress hint */
|
||
|
|
*call_send = true;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_DEBUG_FS
|
||
|
|
|
||
|
|
static const char * const qp_type_str[] = {
|
||
|
|
"SMI", "GSI", "RC", "UC", "UD",
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* qib_qp_iter_print - print information to seq_file
|
||
|
|
* @s: the seq_file
|
||
|
|
* @iter: the iterator
|
||
|
|
*/
|
||
|
|
void qib_qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter)
|
||
|
|
{
|
||
|
|
struct rvt_swqe *wqe;
|
||
|
|
struct rvt_qp *qp = iter->qp;
|
||
|
|
struct qib_qp_priv *priv = qp->priv;
|
||
|
|
|
||
|
|
wqe = rvt_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(&priv->s_dma_busy),
|
||
|
|
!list_empty(&priv->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,
|
||
|
|
rdma_ah_get_dlid(&qp->remote_ah_attr));
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|