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Diffstat (limited to 'net/rds/ib_fmr.c')
-rw-r--r--net/rds/ib_fmr.c269
1 files changed, 0 insertions, 269 deletions
diff --git a/net/rds/ib_fmr.c b/net/rds/ib_fmr.c
deleted file mode 100644
index 93c0437e6a5f..000000000000
--- a/net/rds/ib_fmr.c
+++ /dev/null
@@ -1,269 +0,0 @@
-/*
- * 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 = sg_dma_len(&scat[i]);
- u64 dma_addr = sg_dma_address(&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_array_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 = sg_dma_len(&scat[i]);
- u64 dma_addr = sg_dma_address(&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);
-}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-30 19:05:41 +0300