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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0cf89dcdbc
Implement toleration of dynamic memory operations and 16 GB gigantic pages, where "toleration" means that the driver can cope with dynamic memory operations that happen before the driver is loaded. While the ehca driver is loaded, dynamic memory operations are still prohibited by returning NOTIFY_BAD from the memory notifier. On module load the driver walks through available system memory, checks for available memory ranges and then registers the kernel internal memory region accordingly. The translation of address ranges is implemented via a 3-level busmap. Signed-off-by: Hannes Hering <hering2@de.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*
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* IBM eServer eHCA Infiniband device driver for Linux on POWER
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*
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* MR/MW declarations and inline functions
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*
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* Authors: Dietmar Decker <ddecker@de.ibm.com>
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* Christoph Raisch <raisch@de.ibm.com>
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*
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* Copyright (c) 2005 IBM Corporation
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*
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* All rights reserved.
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*
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* This source code is distributed under a dual license of GPL v2.0 and OpenIB
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* BSD.
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*
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* OpenIB BSD License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _EHCA_MRMW_H_
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#define _EHCA_MRMW_H_
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enum ehca_reg_type {
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EHCA_REG_MR,
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EHCA_REG_BUSMAP_MR
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};
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int ehca_reg_mr(struct ehca_shca *shca,
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struct ehca_mr *e_mr,
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u64 *iova_start,
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u64 size,
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int acl,
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struct ehca_pd *e_pd,
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struct ehca_mr_pginfo *pginfo,
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u32 *lkey,
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u32 *rkey,
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enum ehca_reg_type reg_type);
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int ehca_reg_mr_rpages(struct ehca_shca *shca,
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struct ehca_mr *e_mr,
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struct ehca_mr_pginfo *pginfo);
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int ehca_rereg_mr(struct ehca_shca *shca,
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struct ehca_mr *e_mr,
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u64 *iova_start,
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u64 size,
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int mr_access_flags,
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struct ehca_pd *e_pd,
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struct ehca_mr_pginfo *pginfo,
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u32 *lkey,
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u32 *rkey);
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int ehca_unmap_one_fmr(struct ehca_shca *shca,
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struct ehca_mr *e_fmr);
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int ehca_reg_smr(struct ehca_shca *shca,
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struct ehca_mr *e_origmr,
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struct ehca_mr *e_newmr,
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u64 *iova_start,
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int acl,
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struct ehca_pd *e_pd,
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u32 *lkey,
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u32 *rkey);
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int ehca_reg_internal_maxmr(struct ehca_shca *shca,
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struct ehca_pd *e_pd,
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struct ehca_mr **maxmr);
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int ehca_reg_maxmr(struct ehca_shca *shca,
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struct ehca_mr *e_newmr,
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u64 *iova_start,
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int acl,
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struct ehca_pd *e_pd,
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u32 *lkey,
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u32 *rkey);
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int ehca_dereg_internal_maxmr(struct ehca_shca *shca);
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int ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf *phys_buf_array,
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int num_phys_buf,
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u64 *iova_start,
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u64 *size);
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int ehca_fmr_check_page_list(struct ehca_mr *e_fmr,
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u64 *page_list,
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int list_len);
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int ehca_set_pagebuf(struct ehca_mr_pginfo *pginfo,
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u32 number,
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u64 *kpage);
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int ehca_mr_is_maxmr(u64 size,
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u64 *iova_start);
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void ehca_mrmw_map_acl(int ib_acl,
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u32 *hipz_acl);
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void ehca_mrmw_set_pgsize_hipz_acl(u32 pgsize, u32 *hipz_acl);
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void ehca_mrmw_reverse_map_acl(const u32 *hipz_acl,
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int *ib_acl);
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void ehca_mr_deletenew(struct ehca_mr *mr);
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int ehca_create_busmap(void);
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void ehca_destroy_busmap(void);
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extern struct ib_dma_mapping_ops ehca_dma_mapping_ops;
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#endif /*_EHCA_MRMW_H_*/
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