diff options
Diffstat (limited to 'net/rds/ib_mr.h')
| -rw-r--r-- | net/rds/ib_mr.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/net/rds/ib_mr.h b/net/rds/ib_mr.h new file mode 100644 index 000000000000..d88724fe9a0b --- /dev/null +++ b/net/rds/ib_mr.h @@ -0,0 +1,109 @@ +/* + * 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. + */ +#ifndef _RDS_IB_MR_H +#define _RDS_IB_MR_H + +#include <linux/kernel.h> + +#include "rds.h" +#include "ib.h" + +#define RDS_MR_1M_POOL_SIZE (8192 / 2) +#define RDS_MR_1M_MSG_SIZE 256 +#define RDS_MR_8K_MSG_SIZE 2 +#define RDS_MR_8K_SCALE (256 / (RDS_MR_8K_MSG_SIZE + 1)) +#define RDS_MR_8K_POOL_SIZE (RDS_MR_8K_SCALE * (8192 / 2)) + +/* This is stored as mr->r_trans_private. */ +struct rds_ib_mr { + struct rds_ib_device *device; + struct rds_ib_mr_pool *pool; + struct ib_fmr *fmr; + + struct llist_node llnode; + + /* unmap_list is for freeing */ + struct list_head unmap_list; + unsigned int remap_count; + + struct scatterlist *sg; + unsigned int sg_len; + u64 *dma; + int sg_dma_len; +}; + +/* Our own little MR pool */ +struct rds_ib_mr_pool { + unsigned int pool_type; + struct mutex flush_lock; /* serialize fmr invalidate */ + struct delayed_work flush_worker; /* flush worker */ + + atomic_t item_count; /* total # of MRs */ + atomic_t dirty_count; /* # dirty of MRs */ + + struct llist_head drop_list; /* MRs not reached max_maps */ + struct llist_head free_list; /* unused MRs */ + struct llist_head clean_list; /* unused & unmapped MRs */ + wait_queue_head_t flush_wait; + + atomic_t free_pinned; /* memory pinned by free MRs */ + unsigned long max_items; + unsigned long max_items_soft; + unsigned long max_free_pinned; + struct ib_fmr_attr fmr_attr; +}; + +extern struct workqueue_struct *rds_ib_mr_wq; +extern unsigned int rds_ib_mr_1m_pool_size; +extern unsigned int rds_ib_mr_8k_pool_size; + +struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev, + int npages); +void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev, + struct rds_info_rdma_connection *iinfo); +void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *); +void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents, + struct rds_sock *rs, u32 *key_ret); +void rds_ib_sync_mr(void *trans_private, int dir); +void rds_ib_free_mr(void *trans_private, int invalidate); +void rds_ib_flush_mrs(void); +int rds_ib_mr_init(void); +void rds_ib_mr_exit(void); + +void __rds_ib_teardown_mr(struct rds_ib_mr *); +void rds_ib_teardown_mr(struct rds_ib_mr *); +struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *, int); +int rds_ib_map_fmr(struct rds_ib_device *, struct rds_ib_mr *, + struct scatterlist *, unsigned int); +struct rds_ib_mr *rds_ib_reuse_mr(struct rds_ib_mr_pool *); +int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *, int, struct rds_ib_mr **); +#endif |