6ce70ec7f9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
116 lines
4.4 KiB
C
116 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1999 Matthew R. Green
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* All rights reserved.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: NetBSD: iommuvar.h,v 1.6 2008/05/29 14:51:26 mrg Exp
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_IOMMUVAR_H_
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#define _MACHINE_IOMMUVAR_H_
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#define IO_PAGE_SIZE PAGE_SIZE_8K
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#define IO_PAGE_MASK PAGE_MASK_8K
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#define IO_PAGE_SHIFT PAGE_SHIFT_8K
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#define round_io_page(x) round_page(x)
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#define trunc_io_page(x) trunc_page(x)
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/*
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* LRU queue handling for lazy resource allocation
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*/
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TAILQ_HEAD(iommu_maplruq_head, bus_dmamap);
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/*
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* Per-IOMMU state; the parenthesized comments indicate the locking strategy:
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* i - protected by is_mtx.
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* r - read-only after initialization.
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* * - comment refers to pointer target / target hardware registers
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* (for bus_addr_t).
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* is_maplruq is also locked by is_mtx. Elements of is_tsb may only be
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* accessed from functions operating on the map owning the corresponding
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* resource, so the locking the user is required to do to protect the
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* map is sufficient.
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* dm_reslist of all maps are locked by is_mtx as well.
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* is_dvma_rman has its own internal lock.
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*/
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struct iommu_state {
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struct mtx is_mtx;
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struct rman is_dvma_rman; /* DVMA space rman */
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struct iommu_maplruq_head is_maplruq; /* (i) LRU queue */
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vm_paddr_t is_ptsb; /* (r) TSB physical address */
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uint64_t *is_tsb; /* (*i) TSB virtual address */
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int is_tsbsize; /* (r) 0 = 8K, ... */
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uint64_t is_pmaxaddr; /* (r) max. physical address */
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uint64_t is_dvmabase; /* (r) */
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uint64_t is_cr; /* (r) Control reg value */
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vm_paddr_t is_flushpa[2]; /* (r) */
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volatile uint64_t *is_flushva[2]; /* (r, *i) */
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/*
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* (i)
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* When a flush is completed, 64 bytes will be stored at the given
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* location, the first double word being 1, to indicate completion.
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* The lower 6 address bits are ignored, so the addresses need to be
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* suitably aligned; over-allocate a large enough margin to be able
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* to adjust it.
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* Two such buffers are needed.
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*/
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volatile char is_flush[STRBUF_FLUSHSYNC_NBYTES * 3 - 1];
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/* copies of our parent's state, to allow us to be self contained */
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bus_space_tag_t is_bustag; /* (r) Our bus tag */
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bus_space_handle_t is_bushandle; /* (r) */
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bus_addr_t is_iommu; /* (r, *i) IOMMU registers */
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bus_addr_t is_sb[2]; /* (r, *i) Streaming buffer */
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/* Tag diagnostics access */
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bus_addr_t is_dtag; /* (r, *r) */
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/* Data RAM diagnostic access */
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bus_addr_t is_ddram; /* (r, *r) */
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/* LRU queue diag. access */
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bus_addr_t is_dqueue; /* (r, *r) */
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/* Virtual address diagnostics register */
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bus_addr_t is_dva; /* (r, *r) */
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/* Tag compare diagnostics access */
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bus_addr_t is_dtcmp; /* (r, *r) */
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/* behavior flags */
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u_int is_flags; /* (r) */
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#define IOMMU_RERUN_DISABLE (1 << 0)
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#define IOMMU_FIRE (1 << 1)
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#define IOMMU_FLUSH_CACHE (1 << 2)
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#define IOMMU_PRESERVE_PROM (1 << 3)
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};
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/* interfaces for PCI/SBus code */
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void iommu_init(const char *name, struct iommu_state *is, u_int tsbsize,
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uint32_t iovabase, u_int resvpg);
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void iommu_reset(struct iommu_state *is);
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void iommu_decode_fault(struct iommu_state *is, vm_offset_t phys);
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extern struct bus_dma_methods iommu_dma_methods;
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#endif /* !_MACHINE_IOMMUVAR_H_ */
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