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143 lines
4.8 KiB
143 lines
4.8 KiB
/* |
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* Copyright (c) 2016 Oracle. 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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#ifndef _RDS_IB_MR_H |
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#define _RDS_IB_MR_H |
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#include <linux/kernel.h> |
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#include "rds.h" |
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#include "ib.h" |
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#define RDS_MR_1M_POOL_SIZE (8192 / 2) |
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#define RDS_MR_1M_MSG_SIZE 256 |
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#define RDS_MR_8K_MSG_SIZE 2 |
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#define RDS_MR_8K_SCALE (256 / (RDS_MR_8K_MSG_SIZE + 1)) |
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#define RDS_MR_8K_POOL_SIZE (RDS_MR_8K_SCALE * (8192 / 2)) |
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enum rds_ib_fr_state { |
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FRMR_IS_FREE, /* mr invalidated & ready for use */ |
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FRMR_IS_INUSE, /* mr is in use or used & can be invalidated */ |
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FRMR_IS_STALE, /* Stale MR and needs to be dropped */ |
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}; |
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struct rds_ib_frmr { |
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struct ib_mr *mr; |
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enum rds_ib_fr_state fr_state; |
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bool fr_inv; |
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wait_queue_head_t fr_inv_done; |
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bool fr_reg; |
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wait_queue_head_t fr_reg_done; |
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struct ib_send_wr fr_wr; |
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unsigned int dma_npages; |
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unsigned int sg_byte_len; |
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}; |
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/* This is stored as mr->r_trans_private. */ |
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struct rds_ib_mr { |
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struct delayed_work work; |
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struct rds_ib_device *device; |
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struct rds_ib_mr_pool *pool; |
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struct rds_ib_connection *ic; |
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struct llist_node llnode; |
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/* unmap_list is for freeing */ |
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struct list_head unmap_list; |
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unsigned int remap_count; |
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struct scatterlist *sg; |
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unsigned int sg_len; |
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int sg_dma_len; |
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u8 odp:1; |
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union { |
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struct rds_ib_frmr frmr; |
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struct ib_mr *mr; |
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} u; |
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}; |
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/* Our own little MR pool */ |
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struct rds_ib_mr_pool { |
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unsigned int pool_type; |
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struct mutex flush_lock; /* serialize fmr invalidate */ |
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struct delayed_work flush_worker; /* flush worker */ |
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atomic_t item_count; /* total # of MRs */ |
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atomic_t dirty_count; /* # dirty of MRs */ |
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struct llist_head drop_list; /* MRs not reached max_maps */ |
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struct llist_head free_list; /* unused MRs */ |
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struct llist_head clean_list; /* unused & unmapped MRs */ |
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wait_queue_head_t flush_wait; |
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spinlock_t clean_lock; /* "clean_list" concurrency */ |
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atomic_t free_pinned; /* memory pinned by free MRs */ |
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unsigned long max_items; |
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unsigned long max_items_soft; |
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unsigned long max_free_pinned; |
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unsigned int max_pages; |
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}; |
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extern struct workqueue_struct *rds_ib_mr_wq; |
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extern bool prefer_frmr; |
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struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev, |
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int npages); |
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void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev, |
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struct rds_info_rdma_connection *iinfo); |
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void rds6_ib_get_mr_info(struct rds_ib_device *rds_ibdev, |
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struct rds6_info_rdma_connection *iinfo6); |
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void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *); |
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void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents, |
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struct rds_sock *rs, u32 *key_ret, |
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struct rds_connection *conn, u64 start, u64 length, |
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int need_odp); |
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void rds_ib_sync_mr(void *trans_private, int dir); |
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void rds_ib_free_mr(void *trans_private, int invalidate); |
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void rds_ib_flush_mrs(void); |
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int rds_ib_mr_init(void); |
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void rds_ib_mr_exit(void); |
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u32 rds_ib_get_lkey(void *trans_private); |
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void __rds_ib_teardown_mr(struct rds_ib_mr *); |
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void rds_ib_teardown_mr(struct rds_ib_mr *); |
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struct rds_ib_mr *rds_ib_reuse_mr(struct rds_ib_mr_pool *); |
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int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *, int, struct rds_ib_mr **); |
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struct rds_ib_mr *rds_ib_try_reuse_ibmr(struct rds_ib_mr_pool *); |
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struct rds_ib_mr *rds_ib_reg_frmr(struct rds_ib_device *rds_ibdev, |
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struct rds_ib_connection *ic, |
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struct scatterlist *sg, |
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unsigned long nents, u32 *key); |
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void rds_ib_unreg_frmr(struct list_head *list, unsigned int *nfreed, |
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unsigned long *unpinned, unsigned int goal); |
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void rds_ib_free_frmr_list(struct rds_ib_mr *); |
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#endif
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