You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
269 lines
6.8 KiB
269 lines
6.8 KiB
/*
|
|
* Copyright (c) 2016 Oracle. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* OpenIB.org BSD license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include "ib_mr.h"
|
|
|
|
struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev, int npages)
|
|
{
|
|
struct rds_ib_mr_pool *pool;
|
|
struct rds_ib_mr *ibmr = NULL;
|
|
struct rds_ib_fmr *fmr;
|
|
int err = 0;
|
|
|
|
if (npages <= RDS_MR_8K_MSG_SIZE)
|
|
pool = rds_ibdev->mr_8k_pool;
|
|
else
|
|
pool = rds_ibdev->mr_1m_pool;
|
|
|
|
if (atomic_read(&pool->dirty_count) >= pool->max_items / 10)
|
|
queue_delayed_work(rds_ib_mr_wq, &pool->flush_worker, 10);
|
|
|
|
/* Switch pools if one of the pool is reaching upper limit */
|
|
if (atomic_read(&pool->dirty_count) >= pool->max_items * 9 / 10) {
|
|
if (pool->pool_type == RDS_IB_MR_8K_POOL)
|
|
pool = rds_ibdev->mr_1m_pool;
|
|
else
|
|
pool = rds_ibdev->mr_8k_pool;
|
|
}
|
|
|
|
ibmr = rds_ib_try_reuse_ibmr(pool);
|
|
if (ibmr)
|
|
return ibmr;
|
|
|
|
ibmr = kzalloc_node(sizeof(*ibmr), GFP_KERNEL,
|
|
rdsibdev_to_node(rds_ibdev));
|
|
if (!ibmr) {
|
|
err = -ENOMEM;
|
|
goto out_no_cigar;
|
|
}
|
|
|
|
fmr = &ibmr->u.fmr;
|
|
fmr->fmr = ib_alloc_fmr(rds_ibdev->pd,
|
|
(IB_ACCESS_LOCAL_WRITE |
|
|
IB_ACCESS_REMOTE_READ |
|
|
IB_ACCESS_REMOTE_WRITE |
|
|
IB_ACCESS_REMOTE_ATOMIC),
|
|
&pool->fmr_attr);
|
|
if (IS_ERR(fmr->fmr)) {
|
|
err = PTR_ERR(fmr->fmr);
|
|
fmr->fmr = NULL;
|
|
pr_warn("RDS/IB: %s failed (err=%d)\n", __func__, err);
|
|
goto out_no_cigar;
|
|
}
|
|
|
|
ibmr->pool = pool;
|
|
if (pool->pool_type == RDS_IB_MR_8K_POOL)
|
|
rds_ib_stats_inc(s_ib_rdma_mr_8k_alloc);
|
|
else
|
|
rds_ib_stats_inc(s_ib_rdma_mr_1m_alloc);
|
|
|
|
return ibmr;
|
|
|
|
out_no_cigar:
|
|
kfree(ibmr);
|
|
atomic_dec(&pool->item_count);
|
|
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static int rds_ib_map_fmr(struct rds_ib_device *rds_ibdev,
|
|
struct rds_ib_mr *ibmr, struct scatterlist *sg,
|
|
unsigned int nents)
|
|
{
|
|
struct ib_device *dev = rds_ibdev->dev;
|
|
struct rds_ib_fmr *fmr = &ibmr->u.fmr;
|
|
struct scatterlist *scat = sg;
|
|
u64 io_addr = 0;
|
|
u64 *dma_pages;
|
|
u32 len;
|
|
int page_cnt, sg_dma_len;
|
|
int i, j;
|
|
int ret;
|
|
|
|
sg_dma_len = ib_dma_map_sg(dev, sg, nents, DMA_BIDIRECTIONAL);
|
|
if (unlikely(!sg_dma_len)) {
|
|
pr_warn("RDS/IB: %s failed!\n", __func__);
|
|
return -EBUSY;
|
|
}
|
|
|
|
len = 0;
|
|
page_cnt = 0;
|
|
|
|
for (i = 0; i < sg_dma_len; ++i) {
|
|
unsigned int dma_len = ib_sg_dma_len(dev, &scat[i]);
|
|
u64 dma_addr = ib_sg_dma_address(dev, &scat[i]);
|
|
|
|
if (dma_addr & ~PAGE_MASK) {
|
|
if (i > 0) {
|
|
ib_dma_unmap_sg(dev, sg, nents,
|
|
DMA_BIDIRECTIONAL);
|
|
return -EINVAL;
|
|
} else {
|
|
++page_cnt;
|
|
}
|
|
}
|
|
if ((dma_addr + dma_len) & ~PAGE_MASK) {
|
|
if (i < sg_dma_len - 1) {
|
|
ib_dma_unmap_sg(dev, sg, nents,
|
|
DMA_BIDIRECTIONAL);
|
|
return -EINVAL;
|
|
} else {
|
|
++page_cnt;
|
|
}
|
|
}
|
|
|
|
len += dma_len;
|
|
}
|
|
|
|
page_cnt += len >> PAGE_SHIFT;
|
|
if (page_cnt > ibmr->pool->fmr_attr.max_pages) {
|
|
ib_dma_unmap_sg(dev, sg, nents, DMA_BIDIRECTIONAL);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dma_pages = kmalloc_node(sizeof(u64) * page_cnt, GFP_ATOMIC,
|
|
rdsibdev_to_node(rds_ibdev));
|
|
if (!dma_pages) {
|
|
ib_dma_unmap_sg(dev, sg, nents, DMA_BIDIRECTIONAL);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
page_cnt = 0;
|
|
for (i = 0; i < sg_dma_len; ++i) {
|
|
unsigned int dma_len = ib_sg_dma_len(dev, &scat[i]);
|
|
u64 dma_addr = ib_sg_dma_address(dev, &scat[i]);
|
|
|
|
for (j = 0; j < dma_len; j += PAGE_SIZE)
|
|
dma_pages[page_cnt++] =
|
|
(dma_addr & PAGE_MASK) + j;
|
|
}
|
|
|
|
ret = ib_map_phys_fmr(fmr->fmr, dma_pages, page_cnt, io_addr);
|
|
if (ret) {
|
|
ib_dma_unmap_sg(dev, sg, nents, DMA_BIDIRECTIONAL);
|
|
goto out;
|
|
}
|
|
|
|
/* Success - we successfully remapped the MR, so we can
|
|
* safely tear down the old mapping.
|
|
*/
|
|
rds_ib_teardown_mr(ibmr);
|
|
|
|
ibmr->sg = scat;
|
|
ibmr->sg_len = nents;
|
|
ibmr->sg_dma_len = sg_dma_len;
|
|
ibmr->remap_count++;
|
|
|
|
if (ibmr->pool->pool_type == RDS_IB_MR_8K_POOL)
|
|
rds_ib_stats_inc(s_ib_rdma_mr_8k_used);
|
|
else
|
|
rds_ib_stats_inc(s_ib_rdma_mr_1m_used);
|
|
ret = 0;
|
|
|
|
out:
|
|
kfree(dma_pages);
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct rds_ib_mr *rds_ib_reg_fmr(struct rds_ib_device *rds_ibdev,
|
|
struct scatterlist *sg,
|
|
unsigned long nents,
|
|
u32 *key)
|
|
{
|
|
struct rds_ib_mr *ibmr = NULL;
|
|
struct rds_ib_fmr *fmr;
|
|
int ret;
|
|
|
|
ibmr = rds_ib_alloc_fmr(rds_ibdev, nents);
|
|
if (IS_ERR(ibmr))
|
|
return ibmr;
|
|
|
|
ibmr->device = rds_ibdev;
|
|
fmr = &ibmr->u.fmr;
|
|
ret = rds_ib_map_fmr(rds_ibdev, ibmr, sg, nents);
|
|
if (ret == 0)
|
|
*key = fmr->fmr->rkey;
|
|
else
|
|
rds_ib_free_mr(ibmr, 0);
|
|
|
|
return ibmr;
|
|
}
|
|
|
|
void rds_ib_unreg_fmr(struct list_head *list, unsigned int *nfreed,
|
|
unsigned long *unpinned, unsigned int goal)
|
|
{
|
|
struct rds_ib_mr *ibmr, *next;
|
|
struct rds_ib_fmr *fmr;
|
|
LIST_HEAD(fmr_list);
|
|
int ret = 0;
|
|
unsigned int freed = *nfreed;
|
|
|
|
/* String all ib_mr's onto one list and hand them to ib_unmap_fmr */
|
|
list_for_each_entry(ibmr, list, unmap_list) {
|
|
fmr = &ibmr->u.fmr;
|
|
list_add(&fmr->fmr->list, &fmr_list);
|
|
}
|
|
|
|
ret = ib_unmap_fmr(&fmr_list);
|
|
if (ret)
|
|
pr_warn("RDS/IB: FMR invalidation failed (err=%d)\n", ret);
|
|
|
|
/* Now we can destroy the DMA mapping and unpin any pages */
|
|
list_for_each_entry_safe(ibmr, next, list, unmap_list) {
|
|
fmr = &ibmr->u.fmr;
|
|
*unpinned += ibmr->sg_len;
|
|
__rds_ib_teardown_mr(ibmr);
|
|
if (freed < goal ||
|
|
ibmr->remap_count >= ibmr->pool->fmr_attr.max_maps) {
|
|
if (ibmr->pool->pool_type == RDS_IB_MR_8K_POOL)
|
|
rds_ib_stats_inc(s_ib_rdma_mr_8k_free);
|
|
else
|
|
rds_ib_stats_inc(s_ib_rdma_mr_1m_free);
|
|
list_del(&ibmr->unmap_list);
|
|
ib_dealloc_fmr(fmr->fmr);
|
|
kfree(ibmr);
|
|
freed++;
|
|
}
|
|
}
|
|
*nfreed = freed;
|
|
}
|
|
|
|
void rds_ib_free_fmr_list(struct rds_ib_mr *ibmr)
|
|
{
|
|
struct rds_ib_mr_pool *pool = ibmr->pool;
|
|
|
|
if (ibmr->remap_count >= pool->fmr_attr.max_maps)
|
|
llist_add(&ibmr->llnode, &pool->drop_list);
|
|
else
|
|
llist_add(&ibmr->llnode, &pool->free_list);
|
|
}
|
|
|