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      1 /*	$NetBSD: iommuvar.h,v 1.26 2023/12/01 06:47:59 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999 Matthew R. Green
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _SPARC64_DEV_IOMMUVAR_H_
     30 #define _SPARC64_DEV_IOMMUVAR_H_
     31 
     32 #include <sys/vmem.h>
     33 
     34 /*
     35  * Streaming buffer control
     36  *
     37  * It's easy to deal w/sysio since it has a single streaming buffer, and
     38  * flushes are done on 8-byte boundaries.  But psycho is a pain since it
     39  * has two streaming buffers and the streaming buffer flush dumps 64 bytes
     40  * of data.
     41  */
     42 struct strbuf_ctl {
     43 	struct iommu_state	*sb_is;		/* Pointer to our iommu */
     44 	bus_space_handle_t	sb_sb;		/* Handle for our regs */
     45 	paddr_t			sb_flushpa;	/* to flush streaming buffers */
     46 	volatile int64_t	*sb_flush;
     47 };
     48 
     49 /*
     50  * per-IOMMU state
     51  */
     52 struct iommu_state {
     53 	paddr_t			is_ptsb;	/* TSB physical address */
     54 	int64_t			*is_tsb;	/* TSB virtual address */
     55 	int			is_tsbsize;	/* 0 = 8K, ... */
     56 	u_int			is_dvmabase;
     57 	u_int			is_dvmaend;
     58 	int64_t			is_cr;		/* IOMMU control register value */
     59 	vmem_t			*is_dvmamap;	/* DVMA map for this instance */
     60 	int			is_flags;
     61 #define IOMMU_FLUSH_CACHE	0x00000001
     62 #define IOMMU_TSBSIZE_IN_PTSB	0x00000002	/* PCIe */
     63 #define IOMMU_SYNC_BEFORE_UNMAP	0x00000004
     64 
     65 	struct strbuf_ctl	*is_sb[2];	/* Streaming buffers if any */
     66 
     67 	/* copies of our parents state, to allow us to be self contained */
     68 	bus_space_tag_t		is_bustag;	/* our bus tag */
     69 	bus_space_handle_t	is_iommu;	/* IOMMU registers */
     70 	uint64_t		is_devhandle;   /* for sun4v hypervisor calls */
     71 };
     72 
     73 /* interfaces for PCI/SBUS code */
     74 void	iommu_init(char *, struct iommu_state *, int, uint32_t);
     75 void	iommu_reset(struct iommu_state *);
     76 paddr_t iommu_extract(struct iommu_state *, vaddr_t);
     77 
     78 int	iommu_dvmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t,
     79 		struct proc *, int);
     80 void	iommu_dvmamap_unload(bus_dma_tag_t, bus_dmamap_t);
     81 int	iommu_dvmamap_load_raw(bus_dma_tag_t, bus_dmamap_t,
     82 		bus_dma_segment_t *, int, bus_size_t, int);
     83 void	iommu_dvmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t,
     84 		int);
     85 int	iommu_dvmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t,
     86 		bus_dma_segment_t *, int, int *, int);
     87 void	iommu_dvmamem_free(bus_dma_tag_t, bus_dma_segment_t *, int);
     88 int	iommu_dvmamem_map(bus_dma_tag_t, bus_dma_segment_t *, int, size_t,
     89 		void **, int);
     90 void	iommu_dvmamem_unmap(bus_dma_tag_t, void *, size_t);
     91 
     92 #endif /* _SPARC64_DEV_IOMMUVAR_H_ */
     93