/* $OpenBSD: bus.h,v 1.15 2001/11/05 17:25:57 art Exp $ */ /* $NetBSD: bus.h,v 1.10 1996/12/02 22:19:32 cgd Exp $ */ /* * Copyright (c) 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #ifndef _ALPHA_BUS_H_ #define _ALPHA_BUS_H_ /* * Addresses (in bus space). */ typedef u_long bus_addr_t; typedef u_long bus_size_t; /* * Access methods for bus space. */ typedef struct alpha_bus_space *bus_space_tag_t; typedef u_long bus_space_handle_t; struct alpha_bus_space { /* cookie */ void *abs_cookie; /* mapping/unmapping */ int (*abs_map)(void *, bus_addr_t, bus_size_t, int, bus_space_handle_t *); void (*abs_unmap)(void *, bus_space_handle_t, bus_size_t); int (*abs_subregion)(void *, bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *); /* allocation/deallocation */ int (*abs_alloc)(void *, bus_addr_t, bus_addr_t, bus_size_t, bus_size_t, bus_size_t, int, bus_addr_t *, bus_space_handle_t *); void (*abs_free)(void *, bus_space_handle_t, bus_size_t); /* barrier */ void (*abs_barrier)(void *, bus_space_handle_t, bus_size_t, bus_size_t, int); /* read (single) */ u_int8_t (*abs_r_1)(void *, bus_space_handle_t, bus_size_t); u_int16_t (*abs_r_2)(void *, bus_space_handle_t, bus_size_t); u_int32_t (*abs_r_4)(void *, bus_space_handle_t, bus_size_t); u_int64_t (*abs_r_8)(void *, bus_space_handle_t, bus_size_t); /* read multiple */ void (*abs_rm_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t); void (*abs_rm_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t); void (*abs_rm_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t); void (*abs_rm_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t *, bus_size_t); /* read region */ void (*abs_rr_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t); void (*abs_rr_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t); void (*abs_rr_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t); void (*abs_rr_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t *, bus_size_t); /* write (single) */ void (*abs_w_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t); void (*abs_w_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t); void (*abs_w_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t); void (*abs_w_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t); /* write multiple */ void (*abs_wm_1)(void *, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t); void (*abs_wm_2)(void *, bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t); void (*abs_wm_4)(void *, bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t); void (*abs_wm_8)(void *, bus_space_handle_t, bus_size_t, const u_int64_t *, bus_size_t); /* write region */ void (*abs_wr_1)(void *, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t); void (*abs_wr_2)(void *, bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t); void (*abs_wr_4)(void *, bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t); void (*abs_wr_8)(void *, bus_space_handle_t, bus_size_t, const u_int64_t *, bus_size_t); /* set multiple */ void (*abs_sm_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t, bus_size_t); void (*abs_sm_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t, bus_size_t); void (*abs_sm_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t, bus_size_t); void (*abs_sm_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t, bus_size_t); /* set region */ void (*abs_sr_1)(void *, bus_space_handle_t, bus_size_t, u_int8_t, bus_size_t); void (*abs_sr_2)(void *, bus_space_handle_t, bus_size_t, u_int16_t, bus_size_t); void (*abs_sr_4)(void *, bus_space_handle_t, bus_size_t, u_int32_t, bus_size_t); void (*abs_sr_8)(void *, bus_space_handle_t, bus_size_t, u_int64_t, bus_size_t); /* copy */ void (*abs_c_1)(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t); void (*abs_c_2)(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t); void (*abs_c_4)(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t); void (*abs_c_8)(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t); /* OpenBSD extensions follows */ /* read multiple raw */ void (*abs_rrm_2)(void *, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t); void (*abs_rrm_4)(void *, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t); void (*abs_rrm_8)(void *, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t); /* write multiple raw */ void (*abs_wrm_2)(void *, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t); void (*abs_wrm_4)(void *, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t); void (*abs_wrm_8)(void *, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t); }; /* * Utility macros; INTERNAL USE ONLY. */ #define __abs_c(a,b) __CONCAT(a,b) #define __abs_opname(op,size) __abs_c(__abs_c(__abs_c(abs_,op),_),size) #define __abs_rs(sz, t, h, o) \ (*(t)->__abs_opname(r,sz))((t)->abs_cookie, h, o) #define __abs_ws(sz, t, h, o, v) \ (*(t)->__abs_opname(w,sz))((t)->abs_cookie, h, o, v) #define __abs_nonsingle(type, sz, t, h, o, a, c) \ (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, a, c) #ifndef DEBUG #define __abs_aligned_nonsingle(type, sz, t, h, o, a, c) \ __abs_nonsingle(type, sz, (t), (h), (o), (a), (c)) #else #define __abs_aligned_nonsingle(type, sz, t, h, o, a, c) \ do { \ if (((unsigned long)a & (sz - 1)) != 0) \ panic("bus non-single %d-byte unaligned (to %p) at %s:%d", \ sz, a, __FILE__, __LINE__); \ (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, a, c); \ } while (0) #endif #define __abs_set(type, sz, t, h, o, v, c) \ (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, v, c) #define __abs_copy(sz, t, h1, o1, h2, o2, cnt) \ (*(t)->__abs_opname(c,sz))((t)->abs_cookie, h1, o1, h2, o2, cnt) /* * Mapping and unmapping operations. */ #define bus_space_map(t, a, s, c, hp) \ (*(t)->abs_map)((t)->abs_cookie, (a), (s), (c), (hp)) #define alpha_bus_space_map_noacct bus_space_map #define bus_space_unmap(t, h, s) \ (*(t)->abs_unmap)((t)->abs_cookie, (h), (s)) #define alpha_bus_space_unmap_noacct bus_space_unmap #define bus_space_subregion(t, h, o, s, hp) \ (*(t)->abs_subregion)((t)->abs_cookie, (h), (o), (s), (hp)) /* * Allocation and deallocation operations. */ #define bus_space_alloc(t, rs, re, s, a, b, c, ap, hp) \ (*(t)->abs_alloc)((t)->abs_cookie, (rs), (re), (s), (a), (b), \ (c), (ap), (hp)) #define bus_space_free(t, h, s) \ (*(t)->abs_free)((t)->abs_cookie, (h), (s)) /* * Bus barrier operations. */ #define bus_space_barrier(t, h, o, l, f) \ (*(t)->abs_barrier)((t)->abs_cookie, (h), (o), (l), (f)) #define BUS_BARRIER_READ 0x01 #define BUS_BARRIER_WRITE 0x02 #define BUS_SPACE_BARRIER_READ BUS_BARRIER_READ #define BUS_SPACE_BARRIER_WRITE BUS_BARRIER_WRITE /* * Bus read (single) operations. */ #define bus_space_read_1(t, h, o) __abs_rs(1,(t),(h),(o)) #define bus_space_read_2(t, h, o) __abs_rs(2,(t),(h),(o)) #define bus_space_read_4(t, h, o) __abs_rs(4,(t),(h),(o)) #define bus_space_read_8(t, h, o) __abs_rs(8,(t),(h),(o)) /* * Bus read multiple operations. */ #define bus_space_read_multi_1(t, h, o, a, c) \ __abs_nonsingle(rm,1,(t),(h),(o),(a),(c)) #define bus_space_read_multi_2(t, h, o, a, c) \ __abs_aligned_nonsingle(rm,2,(t),(h),(o),(a),(c)) #define bus_space_read_multi_4(t, h, o, a, c) \ __abs_aligned_nonsingle(rm,4,(t),(h),(o),(a),(c)) #define bus_space_read_multi_8(t, h, o, a, c) \ __abs_aligned_nonsingle(rm,8,(t),(h),(o),(a),(c)) /* * void bus_space_read_raw_multi_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_int8_t *addr, size_t count); * * Read `count' bytes in 2, 4 or 8 byte wide quantities from bus space * described by tag/handle/offset and copy into buffer provided. The buffer * must have proper alignment for the N byte wide entities. Furthermore * possible byte-swapping should be done by these functions. */ #define bus_space_read_raw_multi_2(t, h, o, a, c) \ __abs_nonsingle(rrm,2,(t),(h),(o),(a),(c)) #define bus_space_read_raw_multi_4(t, h, o, a, c) \ __abs_nonsingle(rrm,4,(t),(h),(o),(a),(c)) #define bus_space_read_raw_multi_8(t, h, o, a, c) \ __abs_nonsingle(rrm,8,(t),(h),(o),(a),(c)) /* * Bus read region operations. */ #define bus_space_read_region_1(t, h, o, a, c) \ __abs_nonsingle(rr,1,(t),(h),(o),(a),(c)) #define bus_space_read_region_2(t, h, o, a, c) \ __abs_aligned_nonsingle(rr,2,(t),(h),(o),(a),(c)) #define bus_space_read_region_4(t, h, o, a, c) \ __abs_aligned_nonsingle(rr,4,(t),(h),(o),(a),(c)) #define bus_space_read_region_8(t, h, o, a, c) \ __abs_aligned_nonsingle(rr,8,(t),(h),(o),(a),(c)) /* * Bus write (single) operations. */ #define bus_space_write_1(t, h, o, v) __abs_ws(1,(t),(h),(o),(v)) #define bus_space_write_2(t, h, o, v) __abs_ws(2,(t),(h),(o),(v)) #define bus_space_write_4(t, h, o, v) __abs_ws(4,(t),(h),(o),(v)) #define bus_space_write_8(t, h, o, v) __abs_ws(8,(t),(h),(o),(v)) /* * Bus write multiple operations. */ #define bus_space_write_multi_1(t, h, o, a, c) \ __abs_nonsingle(wm,1,(t),(h),(o),(a),(c)) #define bus_space_write_multi_2(t, h, o, a, c) \ __abs_aligned_nonsingle(wm,2,(t),(h),(o),(a),(c)) #define bus_space_write_multi_4(t, h, o, a, c) \ __abs_aligned_nonsingle(wm,4,(t),(h),(o),(a),(c)) #define bus_space_write_multi_8(t, h, o, a, c) \ __abs_aligned_nonsingle(wm,8,(t),(h),(o),(a),(c)) /* * void bus_space_write_raw_multi_N(bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * u_int8_t *addr, size_t count); * * Write `count' bytes in 2, 4 or 8 byte wide quantities from the buffer * provided to bus space described by tag/handle/offset. The buffer * must have proper alignment for the N byte wide entities. Furthermore * possible byte-swapping should be done by these functions. */ #define bus_space_write_raw_multi_2(t, h, o, a, c) \ __abs_nonsingle(wrm,2,(t),(h),(o),(a),(c)) #define bus_space_write_raw_multi_4(t, h, o, a, c) \ __abs_nonsingle(wrm,4,(t),(h),(o),(a),(c)) #define bus_space_write_raw_multi_8(t, h, o, a, c) \ __abs_nonsingle(wrm,8,(t),(h),(o),(a),(c)) /* * Bus write region operations. */ #define bus_space_write_region_1(t, h, o, a, c) \ __abs_nonsingle(wr,1,(t),(h),(o),(a),(c)) #define bus_space_write_region_2(t, h, o, a, c) \ __abs_aligned_nonsingle(wr,2,(t),(h),(o),(a),(c)) #define bus_space_write_region_4(t, h, o, a, c) \ __abs_aligned_nonsingle(wr,4,(t),(h),(o),(a),(c)) #define bus_space_write_region_8(t, h, o, a, c) \ __abs_aligned_nonsingle(wr,8,(t),(h),(o),(a),(c)) /* * void bus_space_write_raw_region_N __P((bus_space_tag_t tag, * bus_space_handle_t bsh, bus_size_t offset, * const u_int8_t *addr, size_t count)); * * Write `count' bytes in 2, 4 or 8 byte wide quantities to bus space * described by tag/handle and starting at `offset' from the * buffer provided. The buffer must have proper alignment for the N byte * wide entities. Furthermore possible byte-swapping should be done by * these functions. */ #define bus_space_write_raw_region_2(t, h, o, a, c) \ bus_space_write_region_2((t), (h), (o), (const u_int16_t *)(a), (c) >> 1) #define bus_space_write_raw_region_4(t, h, o, a, c) \ bus_space_write_region_4((t), (h), (o), (const u_int32_t *)(a), (c) >> 2) /* * Set multiple operations. */ #define bus_space_set_multi_1(t, h, o, v, c) \ __abs_set(sm,1,(t),(h),(o),(v),(c)) #define bus_space_set_multi_2(t, h, o, v, c) \ __abs_set(sm,2,(t),(h),(o),(v),(c)) #define bus_space_set_multi_4(t, h, o, v, c) \ __abs_set(sm,4,(t),(h),(o),(v),(c)) #define bus_space_set_multi_8(t, h, o, v, c) \ __abs_set(sm,8,(t),(h),(o),(v),(c)) /* * Set region operations. */ #define bus_space_set_region_1(t, h, o, v, c) \ __abs_set(sr,1,(t),(h),(o),(v),(c)) #define bus_space_set_region_2(t, h, o, v, c) \ __abs_set(sr,2,(t),(h),(o),(v),(c)) #define bus_space_set_region_4(t, h, o, v, c) \ __abs_set(sr,4,(t),(h),(o),(v),(c)) #define bus_space_set_region_8(t, h, o, v, c) \ __abs_set(sr,8,(t),(h),(o),(v),(c)) /* * Copy operations. */ #define bus_space_copy_1(t, h1, o1, h2, o2, c) \ __abs_copy(1, t, h1, o1, h2, o2, c) #define bus_space_copy_2(t, h1, o1, h2, o2, c) \ __abs_copy(2, t, h1, o1, h2, o2, c) #define bus_space_copy_4(t, h1, o1, h2, o2, c) \ __abs_copy(4, t, h1, o1, h2, o2, c) #define bus_space_copy_8(t, h1, o1, h2, o2, c) \ __abs_copy(8, t, h1, o1, h2, o2, c) /* * Bus DMA methods. */ /* * Flags used in various bus DMA methods. */ #define BUS_DMA_WAITOK 0x00 /* safe to sleep (pseudo-flag) */ #define BUS_DMA_NOWAIT 0x01 /* not safe to sleep */ #define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */ #define BUS_DMA_COHERENT 0x04 /* hint: map memory DMA coherent */ #define BUS_DMA_BUS1 0x10 /* placeholders for bus functions... */ #define BUS_DMA_BUS2 0x20 #define BUS_DMA_BUS3 0x40 #define BUS_DMA_BUS4 0x80 /* * Private flags stored in the DMA map. */ #define DMAMAP_NO_COALESCE 0x40000000 /* don't coalesce adjacent segments */ #define DMAMAP_HAS_SGMAP 0x80000000 /* sgva/len are valid */ /* Forwards needed by prototypes below. */ struct mbuf; struct uio; struct alpha_sgmap; /* * Operations performed by bus_dmamap_sync(). */ #define BUS_DMASYNC_PREREAD 0x01 #define BUS_DMASYNC_POSTREAD 0x02 #define BUS_DMASYNC_PREWRITE 0x04 #define BUS_DMASYNC_POSTWRITE 0x08 /* * alpha_bus_t * * Busses supported by NetBSD/alpha, used by internal * utility functions. NOT TO BE USED BY MACHINE-INDEPENDENT * CODE! */ typedef enum { ALPHA_BUS_TURBOCHANNEL, ALPHA_BUS_PCI, ALPHA_BUS_EISA, ALPHA_BUS_ISA, ALPHA_BUS_TLSB, } alpha_bus_t; typedef struct alpha_bus_dma_tag *bus_dma_tag_t; typedef struct alpha_bus_dmamap *bus_dmamap_t; /* * bus_dma_segment_t * * Describes a single contiguous DMA transaction. Values * are suitable for programming into DMA registers. */ struct alpha_bus_dma_segment { bus_addr_t ds_addr; /* DMA address */ bus_size_t ds_len; /* length of transfer */ }; typedef struct alpha_bus_dma_segment bus_dma_segment_t; /* * bus_dma_tag_t * * A machine-dependent opaque type describing the implementation of * DMA for a given bus. */ struct alpha_bus_dma_tag { void *_cookie; /* cookie used in the guts */ bus_addr_t _wbase; /* DMA window base */ /* * The following two members are used to chain DMA windows * together. If, during the course of a map load, the * resulting physical memory address is too large to * be addressed by the window, the next window will be * attempted. These would be chained together like so: * * direct -> sgmap -> NULL * or * sgmap -> NULL * or * direct -> NULL * * If the window size is 0, it will not be checked (e.g. * TurboChannel DMA). */ bus_size_t _wsize; struct alpha_bus_dma_tag *_next_window; /* * Some chipsets have a built-in boundary constraint, independent * of what the device requests. This allows that boundary to * be specified. If the device has a more restrictive contraint, * the map will use that, otherwise this boundary will be used. * This value is ignored if 0. */ bus_size_t _boundary; /* * A chipset may have more than one SGMAP window, so SGMAP * windows also get a pointer to their SGMAP state. */ struct alpha_sgmap *_sgmap; /* * Internal-use only utility methods. NOT TO BE USED BY * MACHINE-INDEPENDENT CODE! */ bus_dma_tag_t (*_get_tag)(bus_dma_tag_t, alpha_bus_t); /* * DMA mapping methods. */ int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *); void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t); int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int); void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t); void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int); /* * DMA memory utility functions. */ int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t, bus_dma_segment_t *, int, int *, int); void (*_dmamem_free)(bus_dma_tag_t, bus_dma_segment_t *, int); int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, int, size_t, caddr_t *, int); void (*_dmamem_unmap)(bus_dma_tag_t, caddr_t, size_t); paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, int, off_t, int, int); }; #define alphabus_dma_get_tag(t, b) \ (*(t)->_get_tag)(t, b) #define bus_dmamap_create(t, s, n, m, b, f, p) \ (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) #define bus_dmamap_destroy(t, p) \ (*(t)->_dmamap_destroy)((t), (p)) #define bus_dmamap_load(t, m, b, s, p, f) \ (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) #define bus_dmamap_load_mbuf(t, m, b, f) \ (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) #define bus_dmamap_load_uio(t, m, u, f) \ (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) #define bus_dmamap_unload(t, p) \ (*(t)->_dmamap_unload)((t), (p)) #define bus_dmamap_sync(t, p, a, s, op) \ (*(t)->_dmamap_sync)((t), (p), (a), (s), (op)) #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) #define bus_dmamem_free(t, sg, n) \ (*(t)->_dmamem_free)((t), (sg), (n)) #define bus_dmamem_map(t, sg, n, s, k, f) \ (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) #define bus_dmamem_unmap(t, k, s) \ (*(t)->_dmamem_unmap)((t), (k), (s)) #define bus_dmamem_mmap(t, sg, n, o, p, f) \ (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) /* * bus_dmamap_t * * Describes a DMA mapping. */ struct alpha_bus_dmamap { /* * PRIVATE MEMBERS: not for use my machine-independent code. */ bus_size_t _dm_size; /* largest DMA transfer mappable */ int _dm_segcnt; /* number of segs this map can map */ bus_size_t _dm_maxsegsz; /* largest possible segment */ bus_size_t _dm_boundary; /* don't cross this */ int _dm_flags; /* misc. flags */ /* * This is used only for SGMAP-mapped DMA, but we keep it * here to avoid pointless indirection. */ int _dm_pteidx; /* PTE index */ int _dm_ptecnt; /* PTE count */ u_long _dm_sgva; /* allocated sgva */ bus_size_t _dm_sgvalen; /* svga length */ /* * Private cookie to be used by the DMA back-end. */ void *_dm_cookie; /* * PUBLIC MEMBERS: these are used by machine-independent code. */ bus_size_t dm_mapsize; /* size of the mapping */ int dm_nsegs; /* # valid segments in mapping */ bus_dma_segment_t dm_segs[1]; /* segments; variable length */ }; #ifdef _ALPHA_BUS_DMA_PRIVATE int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *); void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); int _bus_dmamap_load_direct(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, struct proc *, int); int _bus_dmamap_load_mbuf_direct(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); int _bus_dmamap_load_uio_direct(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); int _bus_dmamap_load_raw_direct(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int); void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, int); int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size, bus_size_t alignment, bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags); int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size, bus_size_t alignment, bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, paddr_t low, paddr_t high); void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs); int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs, size_t size, caddr_t *kvap, int flags); void _bus_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva, size_t size); paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs, off_t off, int prot, int flags); #endif /* _ALPHA_BUS_DMA_PRIVATE */ #endif /* _ALPHA_BUS_H_ */