2006-05-11 15:03:08 +08:00
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/*
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* Copyright (c) 2004, 2005, 2006 Voltaire, Inc. All rights reserved.
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2014-04-01 21:28:41 +08:00
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* Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved.
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2006-05-11 15:03:08 +08:00
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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/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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2006-10-20 04:08:53 +08:00
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#include <linux/highmem.h>
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2006-05-11 15:03:08 +08:00
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#include <linux/scatterlist.h>
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#include "iscsi_iser.h"
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2015-08-06 23:32:56 +08:00
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static struct iser_reg_ops fastreg_ops = {
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.alloc_reg_res = iser_alloc_fastreg_pool,
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.free_reg_res = iser_free_fastreg_pool,
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.reg_rdma_mem = iser_reg_rdma_mem_fastreg,
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.unreg_rdma_mem = iser_unreg_mem_fastreg,
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2015-08-06 23:33:01 +08:00
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.reg_desc_get = iser_reg_desc_get_fr,
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.reg_desc_put = iser_reg_desc_put_fr,
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2015-08-06 23:32:56 +08:00
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};
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static struct iser_reg_ops fmr_ops = {
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.alloc_reg_res = iser_alloc_fmr_pool,
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.free_reg_res = iser_free_fmr_pool,
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.reg_rdma_mem = iser_reg_rdma_mem_fmr,
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.unreg_rdma_mem = iser_unreg_mem_fmr,
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2015-08-06 23:33:01 +08:00
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.reg_desc_get = iser_reg_desc_get_fmr,
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.reg_desc_put = iser_reg_desc_put_fmr,
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2015-08-06 23:32:56 +08:00
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};
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int iser_assign_reg_ops(struct iser_device *device)
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{
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struct ib_device_attr *dev_attr = &device->dev_attr;
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/* Assign function handles - based on FMR support */
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if (device->ib_device->alloc_fmr && device->ib_device->dealloc_fmr &&
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device->ib_device->map_phys_fmr && device->ib_device->unmap_fmr) {
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iser_info("FMR supported, using FMR for registration\n");
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device->reg_ops = &fmr_ops;
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} else
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if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
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iser_info("FastReg supported, using FastReg for registration\n");
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device->reg_ops = &fastreg_ops;
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} else {
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iser_err("IB device does not support FMRs nor FastRegs, can't register memory\n");
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return -1;
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}
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return 0;
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}
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2015-04-14 23:08:28 +08:00
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static void
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iser_free_bounce_sg(struct iser_data_buf *data)
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{
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struct scatterlist *sg;
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int count;
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for_each_sg(data->sg, sg, data->size, count)
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__free_page(sg_page(sg));
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kfree(data->sg);
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data->sg = data->orig_sg;
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data->size = data->orig_size;
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data->orig_sg = NULL;
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data->orig_size = 0;
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}
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static int
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iser_alloc_bounce_sg(struct iser_data_buf *data)
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{
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struct scatterlist *sg;
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struct page *page;
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unsigned long length = data->data_len;
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int i = 0, nents = DIV_ROUND_UP(length, PAGE_SIZE);
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sg = kcalloc(nents, sizeof(*sg), GFP_ATOMIC);
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if (!sg)
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goto err;
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sg_init_table(sg, nents);
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while (length) {
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u32 page_len = min_t(u32, length, PAGE_SIZE);
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page = alloc_page(GFP_ATOMIC);
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if (!page)
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goto err;
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sg_set_page(&sg[i], page, page_len, 0);
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length -= page_len;
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i++;
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}
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data->orig_sg = data->sg;
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data->orig_size = data->size;
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data->sg = sg;
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data->size = nents;
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return 0;
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err:
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for (; i > 0; i--)
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__free_page(sg_page(&sg[i - 1]));
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kfree(sg);
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return -ENOMEM;
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}
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static void
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iser_copy_bounce(struct iser_data_buf *data, bool to_buffer)
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{
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struct scatterlist *osg, *bsg = data->sg;
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void *oaddr, *baddr;
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unsigned int left = data->data_len;
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unsigned int bsg_off = 0;
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int i;
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for_each_sg(data->orig_sg, osg, data->orig_size, i) {
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unsigned int copy_len, osg_off = 0;
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oaddr = kmap_atomic(sg_page(osg)) + osg->offset;
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copy_len = min(left, osg->length);
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while (copy_len) {
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unsigned int len = min(copy_len, bsg->length - bsg_off);
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baddr = kmap_atomic(sg_page(bsg)) + bsg->offset;
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if (to_buffer)
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memcpy(baddr + bsg_off, oaddr + osg_off, len);
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else
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memcpy(oaddr + osg_off, baddr + bsg_off, len);
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kunmap_atomic(baddr - bsg->offset);
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osg_off += len;
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bsg_off += len;
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copy_len -= len;
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if (bsg_off >= bsg->length) {
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bsg = sg_next(bsg);
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bsg_off = 0;
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}
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}
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kunmap_atomic(oaddr - osg->offset);
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left -= osg_off;
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}
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}
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static inline void
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iser_copy_from_bounce(struct iser_data_buf *data)
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{
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iser_copy_bounce(data, false);
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}
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static inline void
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iser_copy_to_bounce(struct iser_data_buf *data)
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{
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iser_copy_bounce(data, true);
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}
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2006-09-11 17:22:30 +08:00
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2015-08-06 23:32:54 +08:00
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struct iser_fr_desc *
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2015-08-06 23:33:01 +08:00
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iser_reg_desc_get_fr(struct ib_conn *ib_conn)
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2015-04-14 23:08:21 +08:00
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{
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2015-08-06 23:32:58 +08:00
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struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
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2015-08-06 23:32:54 +08:00
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struct iser_fr_desc *desc;
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2015-04-14 23:08:21 +08:00
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unsigned long flags;
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2015-08-06 23:32:58 +08:00
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spin_lock_irqsave(&fr_pool->lock, flags);
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2015-08-06 23:32:59 +08:00
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desc = list_first_entry(&fr_pool->list,
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2015-08-06 23:32:54 +08:00
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struct iser_fr_desc, list);
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2015-04-14 23:08:21 +08:00
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list_del(&desc->list);
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2015-08-06 23:32:58 +08:00
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spin_unlock_irqrestore(&fr_pool->lock, flags);
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2015-04-14 23:08:21 +08:00
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return desc;
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}
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void
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2015-08-06 23:33:01 +08:00
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iser_reg_desc_put_fr(struct ib_conn *ib_conn,
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struct iser_fr_desc *desc)
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2015-04-14 23:08:21 +08:00
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{
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2015-08-06 23:32:58 +08:00
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struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
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2015-04-14 23:08:21 +08:00
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unsigned long flags;
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2015-08-06 23:32:58 +08:00
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spin_lock_irqsave(&fr_pool->lock, flags);
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2015-08-06 23:32:59 +08:00
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list_add(&desc->list, &fr_pool->list);
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2015-08-06 23:32:58 +08:00
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spin_unlock_irqrestore(&fr_pool->lock, flags);
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2015-04-14 23:08:21 +08:00
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}
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2015-08-06 23:33:01 +08:00
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struct iser_fr_desc *
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iser_reg_desc_get_fmr(struct ib_conn *ib_conn)
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{
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struct iser_fr_pool *fr_pool = &ib_conn->fr_pool;
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return list_first_entry(&fr_pool->list,
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struct iser_fr_desc, list);
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}
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void
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iser_reg_desc_put_fmr(struct ib_conn *ib_conn,
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struct iser_fr_desc *desc)
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{
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}
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2006-05-11 15:03:08 +08:00
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/**
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* iser_start_rdma_unaligned_sg
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*/
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2008-05-22 04:54:11 +08:00
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static int iser_start_rdma_unaligned_sg(struct iscsi_iser_task *iser_task,
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2014-03-06 01:43:45 +08:00
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struct iser_data_buf *data,
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2007-07-18 09:37:42 +08:00
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enum iser_data_dir cmd_dir)
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2006-05-11 15:03:08 +08:00
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{
|
2014-10-01 19:01:58 +08:00
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struct ib_device *dev = iser_task->iser_conn->ib_conn.device->ib_device;
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2015-04-14 23:08:28 +08:00
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int rc;
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2006-05-11 15:03:08 +08:00
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2015-04-14 23:08:28 +08:00
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rc = iser_alloc_bounce_sg(data);
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if (rc) {
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iser_err("Failed to allocate bounce for data len %lu\n",
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data->data_len);
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return rc;
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2006-05-11 15:03:08 +08:00
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}
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2015-04-14 23:08:28 +08:00
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if (cmd_dir == ISER_DIR_OUT)
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iser_copy_to_bounce(data);
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data->dma_nents = ib_dma_map_sg(dev, data->sg, data->size,
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(cmd_dir == ISER_DIR_OUT) ?
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DMA_TO_DEVICE : DMA_FROM_DEVICE);
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if (!data->dma_nents) {
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iser_err("Got dma_nents %d, something went wrong...\n",
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data->dma_nents);
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rc = -ENOMEM;
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goto err;
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}
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2014-03-06 01:43:45 +08:00
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2006-05-11 15:03:08 +08:00
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return 0;
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2015-04-14 23:08:28 +08:00
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err:
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iser_free_bounce_sg(data);
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return rc;
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2006-05-11 15:03:08 +08:00
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}
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/**
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* iser_finalize_rdma_unaligned_sg
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*/
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2014-03-06 01:43:44 +08:00
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2008-05-22 04:54:11 +08:00
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void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task,
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2014-03-06 01:43:44 +08:00
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struct iser_data_buf *data,
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enum iser_data_dir cmd_dir)
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2006-05-11 15:03:08 +08:00
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{
|
2015-04-14 23:08:28 +08:00
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struct ib_device *dev = iser_task->iser_conn->ib_conn.device->ib_device;
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2006-05-11 15:03:08 +08:00
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2015-04-14 23:08:28 +08:00
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ib_dma_unmap_sg(dev, data->sg, data->size,
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2006-12-13 06:31:00 +08:00
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(cmd_dir == ISER_DIR_OUT) ?
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DMA_TO_DEVICE : DMA_FROM_DEVICE);
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2006-05-11 15:03:08 +08:00
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2015-04-14 23:08:28 +08:00
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if (cmd_dir == ISER_DIR_IN)
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iser_copy_from_bounce(data);
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2006-05-11 15:03:08 +08:00
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2015-04-14 23:08:28 +08:00
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iser_free_bounce_sg(data);
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2006-05-11 15:03:08 +08:00
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}
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2009-11-13 03:32:27 +08:00
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#define IS_4K_ALIGNED(addr) ((((unsigned long)addr) & ~MASK_4K) == 0)
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2006-05-11 15:03:08 +08:00
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/**
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* iser_sg_to_page_vec - Translates scatterlist entries to physical addresses
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* and returns the length of resulting physical address array (may be less than
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* the original due to possible compaction).
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*
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* we build a "page vec" under the assumption that the SG meets the RDMA
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* alignment requirements. Other then the first and last SG elements, all
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* the "internal" elements can be compacted into a list whose elements are
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* dma addresses of physical pages. The code supports also the weird case
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* where --few fragments of the same page-- are present in the SG as
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* consecutive elements. Also, it handles one entry SG.
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*/
|
2009-11-13 03:32:27 +08:00
|
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|
2006-05-11 15:03:08 +08:00
|
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|
static int iser_sg_to_page_vec(struct iser_data_buf *data,
|
2013-07-28 17:35:40 +08:00
|
|
|
struct ib_device *ibdev, u64 *pages,
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|
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int *offset, int *data_size)
|
2006-05-11 15:03:08 +08:00
|
|
|
{
|
2015-04-14 23:08:15 +08:00
|
|
|
struct scatterlist *sg, *sgl = data->sg;
|
2009-11-13 03:32:27 +08:00
|
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|
u64 start_addr, end_addr, page, chunk_start = 0;
|
2006-05-11 15:03:08 +08:00
|
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unsigned long total_sz = 0;
|
2009-11-13 03:32:27 +08:00
|
|
|
unsigned int dma_len;
|
|
|
|
int i, new_chunk, cur_page, last_ent = data->dma_nents - 1;
|
2006-05-11 15:03:08 +08:00
|
|
|
|
|
|
|
/* compute the offset of first element */
|
2013-07-28 17:35:40 +08:00
|
|
|
*offset = (u64) sgl[0].offset & ~MASK_4K;
|
2006-05-11 15:03:08 +08:00
|
|
|
|
2009-11-13 03:32:27 +08:00
|
|
|
new_chunk = 1;
|
|
|
|
cur_page = 0;
|
2007-07-24 20:41:13 +08:00
|
|
|
for_each_sg(sgl, sg, data->dma_nents, i) {
|
2009-11-13 03:32:27 +08:00
|
|
|
start_addr = ib_sg_dma_address(ibdev, sg);
|
|
|
|
if (new_chunk)
|
|
|
|
chunk_start = start_addr;
|
|
|
|
dma_len = ib_sg_dma_len(ibdev, sg);
|
|
|
|
end_addr = start_addr + dma_len;
|
2006-12-13 06:31:00 +08:00
|
|
|
total_sz += dma_len;
|
2006-05-11 15:03:08 +08:00
|
|
|
|
2009-11-13 03:32:27 +08:00
|
|
|
/* collect page fragments until aligned or end of SG list */
|
|
|
|
if (!IS_4K_ALIGNED(end_addr) && i < last_ent) {
|
|
|
|
new_chunk = 0;
|
|
|
|
continue;
|
2006-05-11 15:03:08 +08:00
|
|
|
}
|
2009-11-13 03:32:27 +08:00
|
|
|
new_chunk = 1;
|
|
|
|
|
|
|
|
/* address of the first page in the contiguous chunk;
|
|
|
|
masking relevant for the very first SG entry,
|
|
|
|
which might be unaligned */
|
|
|
|
page = chunk_start & MASK_4K;
|
|
|
|
do {
|
2013-07-28 17:35:40 +08:00
|
|
|
pages[cur_page++] = page;
|
2006-09-11 17:22:30 +08:00
|
|
|
page += SIZE_4K;
|
2009-11-13 03:32:27 +08:00
|
|
|
} while (page < end_addr);
|
2006-05-11 15:03:08 +08:00
|
|
|
}
|
2009-11-13 03:32:27 +08:00
|
|
|
|
2013-07-28 17:35:40 +08:00
|
|
|
*data_size = total_sz;
|
|
|
|
iser_dbg("page_vec->data_size:%d cur_page %d\n",
|
|
|
|
*data_size, cur_page);
|
2006-05-11 15:03:08 +08:00
|
|
|
return cur_page;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* iser_data_buf_aligned_len - Tries to determine the maximal correctly aligned
|
|
|
|
* for RDMA sub-list of a scatter-gather list of memory buffers, and returns
|
|
|
|
* the number of entries which are aligned correctly. Supports the case where
|
|
|
|
* consecutive SG elements are actually fragments of the same physcial page.
|
|
|
|
*/
|
2009-11-13 03:32:27 +08:00
|
|
|
static int iser_data_buf_aligned_len(struct iser_data_buf *data,
|
|
|
|
struct ib_device *ibdev)
|
2006-05-11 15:03:08 +08:00
|
|
|
{
|
2015-04-14 23:08:15 +08:00
|
|
|
struct scatterlist *sg, *sgl, *next_sg = NULL;
|
2009-11-13 03:32:27 +08:00
|
|
|
u64 start_addr, end_addr;
|
|
|
|
int i, ret_len, start_check = 0;
|
|
|
|
|
|
|
|
if (data->dma_nents == 1)
|
|
|
|
return 1;
|
2006-05-11 15:03:08 +08:00
|
|
|
|
2015-04-14 23:08:15 +08:00
|
|
|
sgl = data->sg;
|
2009-11-13 03:32:27 +08:00
|
|
|
start_addr = ib_sg_dma_address(ibdev, sgl);
|
2006-05-11 15:03:08 +08:00
|
|
|
|
2007-07-24 20:41:13 +08:00
|
|
|
for_each_sg(sgl, sg, data->dma_nents, i) {
|
2009-11-13 03:32:27 +08:00
|
|
|
if (start_check && !IS_4K_ALIGNED(start_addr))
|
|
|
|
break;
|
|
|
|
|
|
|
|
next_sg = sg_next(sg);
|
|
|
|
if (!next_sg)
|
|
|
|
break;
|
|
|
|
|
|
|
|
end_addr = start_addr + ib_sg_dma_len(ibdev, sg);
|
|
|
|
start_addr = ib_sg_dma_address(ibdev, next_sg);
|
|
|
|
|
|
|
|
if (end_addr == start_addr) {
|
|
|
|
start_check = 0;
|
|
|
|
continue;
|
|
|
|
} else
|
|
|
|
start_check = 1;
|
|
|
|
|
|
|
|
if (!IS_4K_ALIGNED(end_addr))
|
|
|
|
break;
|
2006-05-11 15:03:08 +08:00
|
|
|
}
|
2009-11-13 03:32:27 +08:00
|
|
|
ret_len = (next_sg) ? i : i+1;
|
2015-08-06 23:32:52 +08:00
|
|
|
|
|
|
|
if (unlikely(ret_len != data->dma_nents))
|
|
|
|
iser_warn("rdma alignment violation (%d/%d aligned)\n",
|
|
|
|
ret_len, data->dma_nents);
|
|
|
|
|
2006-05-11 15:03:08 +08:00
|
|
|
return ret_len;
|
|
|
|
}
|
|
|
|
|
2006-12-13 06:31:00 +08:00
|
|
|
static void iser_data_buf_dump(struct iser_data_buf *data,
|
|
|
|
struct ib_device *ibdev)
|
2006-05-11 15:03:08 +08:00
|
|
|
{
|
2007-07-24 20:41:13 +08:00
|
|
|
struct scatterlist *sg;
|
2006-05-11 15:03:08 +08:00
|
|
|
int i;
|
|
|
|
|
2015-04-14 23:08:15 +08:00
|
|
|
for_each_sg(data->sg, sg, data->dma_nents, i)
|
2013-07-28 17:35:36 +08:00
|
|
|
iser_dbg("sg[%d] dma_addr:0x%lX page:0x%p "
|
2006-09-11 17:24:00 +08:00
|
|
|
"off:0x%x sz:0x%x dma_len:0x%x\n",
|
2007-07-24 20:41:13 +08:00
|
|
|
i, (unsigned long)ib_sg_dma_address(ibdev, sg),
|
2007-10-23 03:19:53 +08:00
|
|
|
sg_page(sg), sg->offset,
|
2007-07-24 20:41:13 +08:00
|
|
|
sg->length, ib_sg_dma_len(ibdev, sg));
|
2006-05-11 15:03:08 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void iser_dump_page_vec(struct iser_page_vec *page_vec)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
iser_err("page vec length %d data size %d\n",
|
|
|
|
page_vec->length, page_vec->data_size);
|
|
|
|
for (i = 0; i < page_vec->length; i++)
|
|
|
|
iser_err("%d %lx\n",i,(unsigned long)page_vec->pages[i]);
|
|
|
|
}
|
|
|
|
|
2008-05-22 04:54:11 +08:00
|
|
|
int iser_dma_map_task_data(struct iscsi_iser_task *iser_task,
|
|
|
|
struct iser_data_buf *data,
|
|
|
|
enum iser_data_dir iser_dir,
|
|
|
|
enum dma_data_direction dma_dir)
|
2006-09-27 21:43:06 +08:00
|
|
|
{
|
2006-12-13 06:31:00 +08:00
|
|
|
struct ib_device *dev;
|
2006-09-27 21:43:06 +08:00
|
|
|
|
2008-05-22 04:54:11 +08:00
|
|
|
iser_task->dir[iser_dir] = 1;
|
2014-10-01 19:01:58 +08:00
|
|
|
dev = iser_task->iser_conn->ib_conn.device->ib_device;
|
2006-09-27 21:43:06 +08:00
|
|
|
|
2015-04-14 23:08:15 +08:00
|
|
|
data->dma_nents = ib_dma_map_sg(dev, data->sg, data->size, dma_dir);
|
2006-09-27 21:43:06 +08:00
|
|
|
if (data->dma_nents == 0) {
|
|
|
|
iser_err("dma_map_sg failed!!!\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-03-06 01:43:44 +08:00
|
|
|
void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task,
|
2014-12-28 20:26:11 +08:00
|
|
|
struct iser_data_buf *data,
|
|
|
|
enum dma_data_direction dir)
|
2006-09-27 21:43:06 +08:00
|
|
|
{
|
2006-12-13 06:31:00 +08:00
|
|
|
struct ib_device *dev;
|
2006-09-27 21:43:06 +08:00
|
|
|
|
2014-10-01 19:01:58 +08:00
|
|
|
dev = iser_task->iser_conn->ib_conn.device->ib_device;
|
2015-04-14 23:08:15 +08:00
|
|
|
ib_dma_unmap_sg(dev, data->sg, data->size, dir);
|
2006-09-27 21:43:06 +08:00
|
|
|
}
|
|
|
|
|
2015-04-14 23:08:26 +08:00
|
|
|
static int
|
|
|
|
iser_reg_dma(struct iser_device *device, struct iser_data_buf *mem,
|
|
|
|
struct iser_mem_reg *reg)
|
|
|
|
{
|
|
|
|
struct scatterlist *sg = mem->sg;
|
|
|
|
|
|
|
|
reg->sge.lkey = device->mr->lkey;
|
|
|
|
reg->rkey = device->mr->rkey;
|
|
|
|
reg->sge.addr = ib_sg_dma_address(device->ib_device, &sg[0]);
|
|
|
|
reg->sge.length = ib_sg_dma_len(device->ib_device, &sg[0]);
|
|
|
|
|
|
|
|
iser_dbg("Single DMA entry: lkey=0x%x, rkey=0x%x, addr=0x%llx,"
|
|
|
|
" length=0x%x\n", reg->sge.lkey, reg->rkey,
|
|
|
|
reg->sge.addr, reg->sge.length);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-07-28 17:35:40 +08:00
|
|
|
static int fall_to_bounce_buf(struct iscsi_iser_task *iser_task,
|
2014-03-06 01:43:45 +08:00
|
|
|
struct iser_data_buf *mem,
|
2015-08-06 23:32:52 +08:00
|
|
|
enum iser_data_dir cmd_dir)
|
2013-07-28 17:35:40 +08:00
|
|
|
{
|
2015-04-14 23:08:16 +08:00
|
|
|
struct iscsi_conn *iscsi_conn = iser_task->iser_conn->iscsi_conn;
|
|
|
|
struct iser_device *device = iser_task->iser_conn->ib_conn.device;
|
2013-07-28 17:35:40 +08:00
|
|
|
|
|
|
|
iscsi_conn->fmr_unalign_cnt++;
|
|
|
|
|
|
|
|
if (iser_debug_level > 0)
|
2015-04-14 23:08:16 +08:00
|
|
|
iser_data_buf_dump(mem, device->ib_device);
|
2013-07-28 17:35:40 +08:00
|
|
|
|
|
|
|
/* unmap the command data before accessing it */
|
2014-12-28 20:26:11 +08:00
|
|
|
iser_dma_unmap_task_data(iser_task, mem,
|
|
|
|
(cmd_dir == ISER_DIR_OUT) ?
|
|
|
|
DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
2013-07-28 17:35:40 +08:00
|
|
|
|
|
|
|
/* allocate copy buf, if we are writing, copy the */
|
|
|
|
/* unaligned scatterlist, dma map the copy */
|
2015-04-14 23:08:15 +08:00
|
|
|
if (iser_start_rdma_unaligned_sg(iser_task, mem, cmd_dir) != 0)
|
2014-03-06 01:43:45 +08:00
|
|
|
return -ENOMEM;
|
2013-07-28 17:35:40 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-04-14 23:08:17 +08:00
|
|
|
/**
|
|
|
|
* iser_reg_page_vec - Register physical memory
|
|
|
|
*
|
|
|
|
* returns: 0 on success, errno code on failure
|
|
|
|
*/
|
|
|
|
static
|
2015-08-06 23:33:00 +08:00
|
|
|
int iser_fast_reg_fmr(struct iscsi_iser_task *iser_task,
|
2015-04-14 23:08:20 +08:00
|
|
|
struct iser_data_buf *mem,
|
2015-08-06 23:32:59 +08:00
|
|
|
struct iser_reg_resources *rsc,
|
2015-08-06 23:33:00 +08:00
|
|
|
struct iser_mem_reg *reg)
|
2015-04-14 23:08:17 +08:00
|
|
|
{
|
2015-04-14 23:08:20 +08:00
|
|
|
struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn;
|
|
|
|
struct iser_device *device = ib_conn->device;
|
2015-08-06 23:32:59 +08:00
|
|
|
struct iser_page_vec *page_vec = rsc->page_vec;
|
|
|
|
struct ib_fmr_pool *fmr_pool = rsc->fmr_pool;
|
2015-04-14 23:08:20 +08:00
|
|
|
struct ib_pool_fmr *fmr;
|
|
|
|
int ret, plen;
|
|
|
|
|
|
|
|
plen = iser_sg_to_page_vec(mem, device->ib_device,
|
|
|
|
page_vec->pages,
|
|
|
|
&page_vec->offset,
|
|
|
|
&page_vec->data_size);
|
|
|
|
page_vec->length = plen;
|
|
|
|
if (plen * SIZE_4K < page_vec->data_size) {
|
|
|
|
iser_err("page vec too short to hold this SG\n");
|
|
|
|
iser_data_buf_dump(mem, device->ib_device);
|
|
|
|
iser_dump_page_vec(page_vec);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
2015-04-14 23:08:17 +08:00
|
|
|
|
2015-08-06 23:32:59 +08:00
|
|
|
fmr = ib_fmr_pool_map_phys(fmr_pool,
|
2015-04-14 23:08:20 +08:00
|
|
|
page_vec->pages,
|
2015-04-14 23:08:17 +08:00
|
|
|
page_vec->length,
|
2015-04-14 23:08:20 +08:00
|
|
|
page_vec->pages[0]);
|
|
|
|
if (IS_ERR(fmr)) {
|
|
|
|
ret = PTR_ERR(fmr);
|
|
|
|
iser_err("ib_fmr_pool_map_phys failed: %d\n", ret);
|
|
|
|
return ret;
|
2015-04-14 23:08:17 +08:00
|
|
|
}
|
|
|
|
|
2015-08-06 23:33:00 +08:00
|
|
|
reg->sge.lkey = fmr->fmr->lkey;
|
|
|
|
reg->rkey = fmr->fmr->rkey;
|
|
|
|
reg->sge.addr = page_vec->pages[0] + page_vec->offset;
|
|
|
|
reg->sge.length = page_vec->data_size;
|
|
|
|
reg->mem_h = fmr;
|
2015-04-14 23:08:20 +08:00
|
|
|
|
2015-04-14 23:08:17 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Unregister (previosuly registered using FMR) memory.
|
|
|
|
* If memory is non-FMR does nothing.
|
|
|
|
*/
|
|
|
|
void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task,
|
|
|
|
enum iser_data_dir cmd_dir)
|
|
|
|
{
|
2015-04-14 23:08:19 +08:00
|
|
|
struct iser_mem_reg *reg = &iser_task->rdma_reg[cmd_dir];
|
2015-04-14 23:08:17 +08:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!reg->mem_h)
|
|
|
|
return;
|
|
|
|
|
|
|
|
iser_dbg("PHYSICAL Mem.Unregister mem_h %p\n", reg->mem_h);
|
|
|
|
|
|
|
|
ret = ib_fmr_pool_unmap((struct ib_pool_fmr *)reg->mem_h);
|
|
|
|
if (ret)
|
|
|
|
iser_err("ib_fmr_pool_unmap failed %d\n", ret);
|
|
|
|
|
|
|
|
reg->mem_h = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task,
|
|
|
|
enum iser_data_dir cmd_dir)
|
|
|
|
{
|
2015-08-06 23:33:01 +08:00
|
|
|
struct iser_device *device = iser_task->iser_conn->ib_conn.device;
|
2015-04-14 23:08:19 +08:00
|
|
|
struct iser_mem_reg *reg = &iser_task->rdma_reg[cmd_dir];
|
2015-04-14 23:08:17 +08:00
|
|
|
|
2015-04-14 23:08:21 +08:00
|
|
|
if (!reg->mem_h)
|
2015-04-14 23:08:17 +08:00
|
|
|
return;
|
|
|
|
|
2015-08-06 23:33:01 +08:00
|
|
|
device->reg_ops->reg_desc_put(&iser_task->iser_conn->ib_conn,
|
|
|
|
reg->mem_h);
|
2015-04-14 23:08:17 +08:00
|
|
|
reg->mem_h = NULL;
|
|
|
|
}
|
|
|
|
|
2006-05-11 15:03:08 +08:00
|
|
|
/**
|
2013-07-28 17:35:41 +08:00
|
|
|
* iser_reg_rdma_mem_fmr - Registers memory intended for RDMA,
|
|
|
|
* using FMR (if possible) obtaining rkey and va
|
2006-05-11 15:03:08 +08:00
|
|
|
*
|
|
|
|
* returns 0 on success, errno code on failure
|
|
|
|
*/
|
2013-07-28 17:35:41 +08:00
|
|
|
int iser_reg_rdma_mem_fmr(struct iscsi_iser_task *iser_task,
|
|
|
|
enum iser_data_dir cmd_dir)
|
2006-05-11 15:03:08 +08:00
|
|
|
{
|
2014-10-01 19:01:58 +08:00
|
|
|
struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn;
|
|
|
|
struct iser_device *device = ib_conn->device;
|
2006-12-13 06:31:00 +08:00
|
|
|
struct ib_device *ibdev = device->ib_device;
|
2008-05-22 04:54:11 +08:00
|
|
|
struct iser_data_buf *mem = &iser_task->data[cmd_dir];
|
2015-04-14 23:08:19 +08:00
|
|
|
struct iser_mem_reg *mem_reg;
|
2006-05-11 15:03:08 +08:00
|
|
|
int aligned_len;
|
|
|
|
int err;
|
2006-09-11 17:24:00 +08:00
|
|
|
int i;
|
2006-05-11 15:03:08 +08:00
|
|
|
|
2015-04-14 23:08:19 +08:00
|
|
|
mem_reg = &iser_task->rdma_reg[cmd_dir];
|
2006-05-11 15:03:08 +08:00
|
|
|
|
2006-12-13 06:31:00 +08:00
|
|
|
aligned_len = iser_data_buf_aligned_len(mem, ibdev);
|
2013-07-28 17:35:42 +08:00
|
|
|
if (aligned_len != mem->dma_nents) {
|
2015-08-06 23:32:52 +08:00
|
|
|
err = fall_to_bounce_buf(iser_task, mem, cmd_dir);
|
2013-07-28 17:35:40 +08:00
|
|
|
if (err) {
|
|
|
|
iser_err("failed to allocate bounce buffer\n");
|
|
|
|
return err;
|
|
|
|
}
|
2006-05-11 15:03:08 +08:00
|
|
|
}
|
|
|
|
|
2006-09-11 17:26:33 +08:00
|
|
|
/* if there a single dma entry, FMR is not needed */
|
|
|
|
if (mem->dma_nents == 1) {
|
2015-04-14 23:08:26 +08:00
|
|
|
return iser_reg_dma(device, mem, mem_reg);
|
2006-09-11 17:26:33 +08:00
|
|
|
} else { /* use FMR for multiple dma entries */
|
2015-08-06 23:32:59 +08:00
|
|
|
struct iser_fr_desc *desc;
|
|
|
|
|
2015-08-06 23:33:01 +08:00
|
|
|
desc = device->reg_ops->reg_desc_get(ib_conn);
|
2015-08-06 23:33:00 +08:00
|
|
|
err = iser_fast_reg_fmr(iser_task, mem, &desc->rsc, mem_reg);
|
2013-02-21 22:50:09 +08:00
|
|
|
if (err && err != -EAGAIN) {
|
2006-12-13 06:31:00 +08:00
|
|
|
iser_data_buf_dump(mem, ibdev);
|
2008-05-22 04:54:11 +08:00
|
|
|
iser_err("mem->dma_nents = %d (dlength = 0x%x)\n",
|
|
|
|
mem->dma_nents,
|
|
|
|
ntoh24(iser_task->desc.iscsi_header.dlength));
|
2006-09-11 17:26:33 +08:00
|
|
|
iser_err("page_vec: data_size = 0x%x, length = %d, offset = 0x%x\n",
|
2015-08-06 23:32:59 +08:00
|
|
|
desc->rsc.page_vec->data_size,
|
|
|
|
desc->rsc.page_vec->length,
|
|
|
|
desc->rsc.page_vec->offset);
|
|
|
|
for (i = 0; i < desc->rsc.page_vec->length; i++)
|
2006-09-11 17:26:33 +08:00
|
|
|
iser_err("page_vec[%d] = 0x%llx\n", i,
|
2015-08-06 23:32:59 +08:00
|
|
|
(unsigned long long)desc->rsc.page_vec->pages[i]);
|
2006-09-11 17:24:00 +08:00
|
|
|
}
|
2013-05-01 21:25:26 +08:00
|
|
|
if (err)
|
|
|
|
return err;
|
2006-09-11 17:24:00 +08:00
|
|
|
}
|
2006-05-11 15:03:08 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2013-07-28 17:35:42 +08:00
|
|
|
|
2014-12-07 22:10:06 +08:00
|
|
|
static void
|
2014-08-14 00:54:33 +08:00
|
|
|
iser_set_dif_domain(struct scsi_cmnd *sc, struct ib_sig_attrs *sig_attrs,
|
|
|
|
struct ib_sig_domain *domain)
|
|
|
|
{
|
2014-08-14 00:54:35 +08:00
|
|
|
domain->sig_type = IB_SIG_TYPE_T10_DIF;
|
2014-12-07 22:10:06 +08:00
|
|
|
domain->sig.dif.pi_interval = scsi_prot_interval(sc);
|
|
|
|
domain->sig.dif.ref_tag = scsi_prot_ref_tag(sc);
|
2014-08-14 00:54:35 +08:00
|
|
|
/*
|
|
|
|
* At the moment we hard code those, but in the future
|
|
|
|
* we will take them from sc.
|
|
|
|
*/
|
|
|
|
domain->sig.dif.apptag_check_mask = 0xffff;
|
|
|
|
domain->sig.dif.app_escape = true;
|
|
|
|
domain->sig.dif.ref_escape = true;
|
2014-12-07 22:10:06 +08:00
|
|
|
if (sc->prot_flags & SCSI_PROT_REF_INCREMENT)
|
2014-08-14 00:54:35 +08:00
|
|
|
domain->sig.dif.ref_remap = true;
|
2014-08-14 00:54:33 +08:00
|
|
|
};
|
2014-03-06 01:43:48 +08:00
|
|
|
|
|
|
|
static int
|
|
|
|
iser_set_sig_attrs(struct scsi_cmnd *sc, struct ib_sig_attrs *sig_attrs)
|
|
|
|
{
|
|
|
|
switch (scsi_get_prot_op(sc)) {
|
|
|
|
case SCSI_PROT_WRITE_INSERT:
|
|
|
|
case SCSI_PROT_READ_STRIP:
|
2014-08-14 00:54:35 +08:00
|
|
|
sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE;
|
2014-08-14 00:54:33 +08:00
|
|
|
iser_set_dif_domain(sc, sig_attrs, &sig_attrs->wire);
|
2014-03-06 01:43:48 +08:00
|
|
|
sig_attrs->wire.sig.dif.bg_type = IB_T10DIF_CRC;
|
|
|
|
break;
|
|
|
|
case SCSI_PROT_READ_INSERT:
|
|
|
|
case SCSI_PROT_WRITE_STRIP:
|
2014-08-14 00:54:35 +08:00
|
|
|
sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE;
|
2014-08-14 00:54:33 +08:00
|
|
|
iser_set_dif_domain(sc, sig_attrs, &sig_attrs->mem);
|
2014-12-07 22:10:06 +08:00
|
|
|
sig_attrs->mem.sig.dif.bg_type = sc->prot_flags & SCSI_PROT_IP_CHECKSUM ?
|
|
|
|
IB_T10DIF_CSUM : IB_T10DIF_CRC;
|
2014-03-06 01:43:48 +08:00
|
|
|
break;
|
|
|
|
case SCSI_PROT_READ_PASS:
|
|
|
|
case SCSI_PROT_WRITE_PASS:
|
2014-08-14 00:54:33 +08:00
|
|
|
iser_set_dif_domain(sc, sig_attrs, &sig_attrs->wire);
|
2014-03-06 01:43:48 +08:00
|
|
|
sig_attrs->wire.sig.dif.bg_type = IB_T10DIF_CRC;
|
2014-08-14 00:54:33 +08:00
|
|
|
iser_set_dif_domain(sc, sig_attrs, &sig_attrs->mem);
|
2014-12-07 22:10:06 +08:00
|
|
|
sig_attrs->mem.sig.dif.bg_type = sc->prot_flags & SCSI_PROT_IP_CHECKSUM ?
|
|
|
|
IB_T10DIF_CSUM : IB_T10DIF_CRC;
|
2014-03-06 01:43:48 +08:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
iser_err("Unsupported PI operation %d\n",
|
|
|
|
scsi_get_prot_op(sc));
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
2014-08-14 00:54:35 +08:00
|
|
|
|
2014-03-06 01:43:48 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-12-07 22:10:06 +08:00
|
|
|
static inline void
|
2014-03-06 01:43:48 +08:00
|
|
|
iser_set_prot_checks(struct scsi_cmnd *sc, u8 *mask)
|
|
|
|
{
|
2014-12-07 22:10:06 +08:00
|
|
|
*mask = 0;
|
|
|
|
if (sc->prot_flags & SCSI_PROT_REF_CHECK)
|
|
|
|
*mask |= ISER_CHECK_REFTAG;
|
|
|
|
if (sc->prot_flags & SCSI_PROT_GUARD_CHECK)
|
|
|
|
*mask |= ISER_CHECK_GUARD;
|
2014-03-06 01:43:48 +08:00
|
|
|
}
|
|
|
|
|
2014-12-07 22:10:01 +08:00
|
|
|
static void
|
|
|
|
iser_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr)
|
|
|
|
{
|
|
|
|
u32 rkey;
|
|
|
|
|
|
|
|
memset(inv_wr, 0, sizeof(*inv_wr));
|
|
|
|
inv_wr->opcode = IB_WR_LOCAL_INV;
|
|
|
|
inv_wr->wr_id = ISER_FASTREG_LI_WRID;
|
|
|
|
inv_wr->ex.invalidate_rkey = mr->rkey;
|
|
|
|
|
|
|
|
rkey = ib_inc_rkey(mr->rkey);
|
|
|
|
ib_update_fast_reg_key(mr, rkey);
|
|
|
|
}
|
|
|
|
|
2014-03-06 01:43:48 +08:00
|
|
|
static int
|
|
|
|
iser_reg_sig_mr(struct iscsi_iser_task *iser_task,
|
2015-08-06 23:32:53 +08:00
|
|
|
struct iser_pi_context *pi_ctx,
|
2015-04-14 23:08:25 +08:00
|
|
|
struct iser_mem_reg *data_reg,
|
|
|
|
struct iser_mem_reg *prot_reg,
|
|
|
|
struct iser_mem_reg *sig_reg)
|
2014-03-06 01:43:48 +08:00
|
|
|
{
|
2014-10-01 19:01:58 +08:00
|
|
|
struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn;
|
2014-03-06 01:43:48 +08:00
|
|
|
struct ib_send_wr sig_wr, inv_wr;
|
|
|
|
struct ib_send_wr *bad_wr, *wr = NULL;
|
|
|
|
struct ib_sig_attrs sig_attrs;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
memset(&sig_attrs, 0, sizeof(sig_attrs));
|
|
|
|
ret = iser_set_sig_attrs(iser_task->sc, &sig_attrs);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
|
|
|
|
2014-12-07 22:10:06 +08:00
|
|
|
iser_set_prot_checks(iser_task->sc, &sig_attrs.check_mask);
|
2014-03-06 01:43:48 +08:00
|
|
|
|
2015-08-06 23:32:53 +08:00
|
|
|
if (!pi_ctx->sig_mr_valid) {
|
2014-12-07 22:10:01 +08:00
|
|
|
iser_inv_rkey(&inv_wr, pi_ctx->sig_mr);
|
2014-03-06 01:43:48 +08:00
|
|
|
wr = &inv_wr;
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(&sig_wr, 0, sizeof(sig_wr));
|
|
|
|
sig_wr.opcode = IB_WR_REG_SIG_MR;
|
|
|
|
sig_wr.wr_id = ISER_FASTREG_LI_WRID;
|
2015-04-14 23:08:25 +08:00
|
|
|
sig_wr.sg_list = &data_reg->sge;
|
2014-03-06 01:43:48 +08:00
|
|
|
sig_wr.num_sge = 1;
|
|
|
|
sig_wr.wr.sig_handover.sig_attrs = &sig_attrs;
|
|
|
|
sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr;
|
|
|
|
if (scsi_prot_sg_count(iser_task->sc))
|
2015-04-14 23:08:25 +08:00
|
|
|
sig_wr.wr.sig_handover.prot = &prot_reg->sge;
|
2014-03-06 01:43:48 +08:00
|
|
|
sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE |
|
|
|
|
IB_ACCESS_REMOTE_READ |
|
|
|
|
IB_ACCESS_REMOTE_WRITE;
|
|
|
|
|
|
|
|
if (!wr)
|
|
|
|
wr = &sig_wr;
|
|
|
|
else
|
|
|
|
wr->next = &sig_wr;
|
|
|
|
|
2014-10-01 19:01:58 +08:00
|
|
|
ret = ib_post_send(ib_conn->qp, wr, &bad_wr);
|
2014-03-06 01:43:48 +08:00
|
|
|
if (ret) {
|
|
|
|
iser_err("reg_sig_mr failed, ret:%d\n", ret);
|
|
|
|
goto err;
|
|
|
|
}
|
2015-08-06 23:32:53 +08:00
|
|
|
pi_ctx->sig_mr_valid = 0;
|
2014-03-06 01:43:48 +08:00
|
|
|
|
2015-04-14 23:08:25 +08:00
|
|
|
sig_reg->sge.lkey = pi_ctx->sig_mr->lkey;
|
|
|
|
sig_reg->rkey = pi_ctx->sig_mr->rkey;
|
|
|
|
sig_reg->sge.addr = 0;
|
|
|
|
sig_reg->sge.length = scsi_transfer_length(iser_task->sc);
|
2014-03-06 01:43:48 +08:00
|
|
|
|
2015-04-14 23:08:25 +08:00
|
|
|
iser_dbg("sig_sge: lkey: 0x%x, rkey: 0x%x, addr: 0x%llx, length: %u\n",
|
|
|
|
sig_reg->sge.lkey, sig_reg->rkey, sig_reg->sge.addr,
|
|
|
|
sig_reg->sge.length);
|
2014-03-06 01:43:48 +08:00
|
|
|
err:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2014-03-06 01:43:40 +08:00
|
|
|
static int iser_fast_reg_mr(struct iscsi_iser_task *iser_task,
|
|
|
|
struct iser_data_buf *mem,
|
2015-08-06 23:32:53 +08:00
|
|
|
struct iser_reg_resources *rsc,
|
2015-04-14 23:08:25 +08:00
|
|
|
struct iser_mem_reg *reg)
|
2013-07-28 17:35:42 +08:00
|
|
|
{
|
2014-10-01 19:01:58 +08:00
|
|
|
struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn;
|
|
|
|
struct iser_device *device = ib_conn->device;
|
2014-03-06 01:43:48 +08:00
|
|
|
struct ib_mr *mr;
|
|
|
|
struct ib_fast_reg_page_list *frpl;
|
2013-07-28 17:35:42 +08:00
|
|
|
struct ib_send_wr fastreg_wr, inv_wr;
|
|
|
|
struct ib_send_wr *bad_wr, *wr = NULL;
|
2014-03-06 01:43:40 +08:00
|
|
|
int ret, offset, size, plen;
|
|
|
|
|
|
|
|
/* if there a single dma entry, dma mr suffices */
|
2015-04-14 23:08:26 +08:00
|
|
|
if (mem->dma_nents == 1)
|
|
|
|
return iser_reg_dma(device, mem, reg);
|
2014-03-06 01:43:40 +08:00
|
|
|
|
2015-08-06 23:32:53 +08:00
|
|
|
mr = rsc->mr;
|
|
|
|
frpl = rsc->frpl;
|
2014-03-06 01:43:48 +08:00
|
|
|
|
|
|
|
plen = iser_sg_to_page_vec(mem, device->ib_device, frpl->page_list,
|
2014-03-06 01:43:40 +08:00
|
|
|
&offset, &size);
|
|
|
|
if (plen * SIZE_4K < size) {
|
|
|
|
iser_err("fast reg page_list too short to hold this SG\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
2013-07-28 17:35:42 +08:00
|
|
|
|
2015-08-06 23:32:53 +08:00
|
|
|
if (!rsc->mr_valid) {
|
2014-12-07 22:10:01 +08:00
|
|
|
iser_inv_rkey(&inv_wr, mr);
|
2013-07-28 17:35:42 +08:00
|
|
|
wr = &inv_wr;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Prepare FASTREG WR */
|
|
|
|
memset(&fastreg_wr, 0, sizeof(fastreg_wr));
|
2014-03-06 01:43:39 +08:00
|
|
|
fastreg_wr.wr_id = ISER_FASTREG_LI_WRID;
|
2013-07-28 17:35:42 +08:00
|
|
|
fastreg_wr.opcode = IB_WR_FAST_REG_MR;
|
2014-03-06 01:43:48 +08:00
|
|
|
fastreg_wr.wr.fast_reg.iova_start = frpl->page_list[0] + offset;
|
|
|
|
fastreg_wr.wr.fast_reg.page_list = frpl;
|
2014-03-06 01:43:40 +08:00
|
|
|
fastreg_wr.wr.fast_reg.page_list_len = plen;
|
2013-07-28 17:35:42 +08:00
|
|
|
fastreg_wr.wr.fast_reg.page_shift = SHIFT_4K;
|
2014-03-06 01:43:40 +08:00
|
|
|
fastreg_wr.wr.fast_reg.length = size;
|
2014-03-06 01:43:48 +08:00
|
|
|
fastreg_wr.wr.fast_reg.rkey = mr->rkey;
|
2013-07-28 17:35:42 +08:00
|
|
|
fastreg_wr.wr.fast_reg.access_flags = (IB_ACCESS_LOCAL_WRITE |
|
|
|
|
IB_ACCESS_REMOTE_WRITE |
|
|
|
|
IB_ACCESS_REMOTE_READ);
|
|
|
|
|
2014-01-23 18:31:28 +08:00
|
|
|
if (!wr)
|
2013-07-28 17:35:42 +08:00
|
|
|
wr = &fastreg_wr;
|
2014-01-23 18:31:28 +08:00
|
|
|
else
|
2013-07-28 17:35:42 +08:00
|
|
|
wr->next = &fastreg_wr;
|
|
|
|
|
2014-10-01 19:01:58 +08:00
|
|
|
ret = ib_post_send(ib_conn->qp, wr, &bad_wr);
|
2013-07-28 17:35:42 +08:00
|
|
|
if (ret) {
|
|
|
|
iser_err("fast registration failed, ret:%d\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
2015-08-06 23:32:53 +08:00
|
|
|
rsc->mr_valid = 0;
|
2013-07-28 17:35:42 +08:00
|
|
|
|
2015-04-14 23:08:25 +08:00
|
|
|
reg->sge.lkey = mr->lkey;
|
|
|
|
reg->rkey = mr->rkey;
|
|
|
|
reg->sge.addr = frpl->page_list[0] + offset;
|
|
|
|
reg->sge.length = size;
|
2013-07-28 17:35:42 +08:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2014-03-06 01:43:39 +08:00
|
|
|
* iser_reg_rdma_mem_fastreg - Registers memory intended for RDMA,
|
2013-07-28 17:35:42 +08:00
|
|
|
* using Fast Registration WR (if possible) obtaining rkey and va
|
|
|
|
*
|
|
|
|
* returns 0 on success, errno code on failure
|
|
|
|
*/
|
2014-03-06 01:43:39 +08:00
|
|
|
int iser_reg_rdma_mem_fastreg(struct iscsi_iser_task *iser_task,
|
|
|
|
enum iser_data_dir cmd_dir)
|
2013-07-28 17:35:42 +08:00
|
|
|
{
|
2014-10-01 19:01:58 +08:00
|
|
|
struct ib_conn *ib_conn = &iser_task->iser_conn->ib_conn;
|
|
|
|
struct iser_device *device = ib_conn->device;
|
2013-07-28 17:35:42 +08:00
|
|
|
struct ib_device *ibdev = device->ib_device;
|
|
|
|
struct iser_data_buf *mem = &iser_task->data[cmd_dir];
|
2015-04-14 23:08:19 +08:00
|
|
|
struct iser_mem_reg *mem_reg = &iser_task->rdma_reg[cmd_dir];
|
2015-08-06 23:32:54 +08:00
|
|
|
struct iser_fr_desc *desc = NULL;
|
2013-07-28 17:35:42 +08:00
|
|
|
int err, aligned_len;
|
|
|
|
|
|
|
|
aligned_len = iser_data_buf_aligned_len(mem, ibdev);
|
|
|
|
if (aligned_len != mem->dma_nents) {
|
2015-08-06 23:32:52 +08:00
|
|
|
err = fall_to_bounce_buf(iser_task, mem, cmd_dir);
|
2013-07-28 17:35:42 +08:00
|
|
|
if (err) {
|
|
|
|
iser_err("failed to allocate bounce buffer\n");
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-06 01:43:48 +08:00
|
|
|
if (mem->dma_nents != 1 ||
|
|
|
|
scsi_get_prot_op(iser_task->sc) != SCSI_PROT_NORMAL) {
|
2015-08-06 23:33:01 +08:00
|
|
|
desc = device->reg_ops->reg_desc_get(ib_conn);
|
2015-04-14 23:08:19 +08:00
|
|
|
mem_reg->mem_h = desc;
|
2014-03-06 01:43:40 +08:00
|
|
|
}
|
2013-07-28 17:35:42 +08:00
|
|
|
|
2015-08-06 23:32:53 +08:00
|
|
|
err = iser_fast_reg_mr(iser_task, mem,
|
|
|
|
desc ? &desc->rsc : NULL, mem_reg);
|
2014-03-06 01:43:40 +08:00
|
|
|
if (err)
|
|
|
|
goto err_reg;
|
|
|
|
|
2014-03-06 01:43:48 +08:00
|
|
|
if (scsi_get_prot_op(iser_task->sc) != SCSI_PROT_NORMAL) {
|
2015-04-14 23:08:25 +08:00
|
|
|
struct iser_mem_reg prot_reg;
|
2014-03-06 01:43:48 +08:00
|
|
|
|
2015-04-14 23:08:25 +08:00
|
|
|
memset(&prot_reg, 0, sizeof(prot_reg));
|
2014-03-06 01:43:48 +08:00
|
|
|
if (scsi_prot_sg_count(iser_task->sc)) {
|
|
|
|
mem = &iser_task->prot[cmd_dir];
|
|
|
|
aligned_len = iser_data_buf_aligned_len(mem, ibdev);
|
|
|
|
if (aligned_len != mem->dma_nents) {
|
2015-04-14 23:08:16 +08:00
|
|
|
err = fall_to_bounce_buf(iser_task, mem,
|
2015-08-06 23:32:52 +08:00
|
|
|
cmd_dir);
|
2014-03-06 01:43:48 +08:00
|
|
|
if (err) {
|
|
|
|
iser_err("failed to allocate bounce buffer\n");
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-08-06 23:32:53 +08:00
|
|
|
err = iser_fast_reg_mr(iser_task, mem,
|
|
|
|
&desc->pi_ctx->rsc, &prot_reg);
|
2014-03-06 01:43:48 +08:00
|
|
|
if (err)
|
|
|
|
goto err_reg;
|
|
|
|
}
|
|
|
|
|
2015-08-06 23:32:53 +08:00
|
|
|
err = iser_reg_sig_mr(iser_task, desc->pi_ctx, mem_reg,
|
2015-04-14 23:08:25 +08:00
|
|
|
&prot_reg, mem_reg);
|
2014-03-06 01:43:48 +08:00
|
|
|
if (err) {
|
|
|
|
iser_err("Failed to register signature mr\n");
|
|
|
|
return err;
|
|
|
|
}
|
2015-08-06 23:32:53 +08:00
|
|
|
desc->pi_ctx->sig_protected = 1;
|
2014-03-06 01:43:48 +08:00
|
|
|
}
|
2014-03-06 01:43:40 +08:00
|
|
|
|
2013-07-28 17:35:42 +08:00
|
|
|
return 0;
|
|
|
|
err_reg:
|
2015-04-14 23:08:21 +08:00
|
|
|
if (desc)
|
2015-08-06 23:33:01 +08:00
|
|
|
device->reg_ops->reg_desc_put(ib_conn, desc);
|
2014-03-06 01:43:40 +08:00
|
|
|
|
2013-07-28 17:35:42 +08:00
|
|
|
return err;
|
|
|
|
}
|