/* $OpenBSD: bus.h,v 1.24 2006/05/12 20:48:19 brad 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))
/*
* void bus_space_read_raw_region_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 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_read_raw_region_2(t, h, o, a, c) \
bus_space_read_region_2((t), (h), (o), (u_int16_t *)(a), (c) >> 1)
#define bus_space_read_raw_region_4(t, h, o, a, c) \
bus_space_read_region_4((t), (h), (o), (u_int32_t *)(a), (c) >> 2)
/*
* 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(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 0x000 /* safe to sleep (pseudo-flag) */
#define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */
#define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */
#define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */
#define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */
#define BUS_DMA_BUS2 0x020
#define BUS_DMA_BUS3 0x040
#define BUS_DMA_24BIT 0x080 /* isadma map */
#define BUS_DMA_STREAMING 0x100 /* hint: sequential, unidirectional */
#define BUS_DMA_READ 0x200 /* mapping is device -> memory only */
#define BUS_DMA_WRITE 0x400 /* mapping is memory -> device only */
/*
* Private flags stored in the DMA map.
*/
#define DMAMAP_NO_COALESCE 0x40000000 /* don't coalesce adjacent
segments */
/* 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 constraint,
* 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;
/*
* The SGMAP MMU implements a prefetch FIFO to keep data
* moving down the pipe, when doing host->bus DMA writes.
* The threshold (distance until the next page) used to
* trigger the prefetch is differnet on different chipsets,
* and we need to know what it is in order to know whether
* or not to allocate a spill page.
*/
bus_size_t _pfthresh;
/*
* 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) \
(void)(t), \
(*(p)->_dm_window->_dmamap_unload)((p)->_dm_window, (p))
#define bus_dmamap_sync(t, p, a, s, op) \
(void)(t), \
(*(p)->_dm_window->_dmamap_sync)((p)->_dm_window, (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 by 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 */
/*
* Private cookie to be used by the DMA back-end.
*/
void *_dm_cookie;
/*
* The DMA window that we ended up being mapped in.
*/
bus_dma_tag_t _dm_window;
/*
* 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_ */
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