Annotation of sys/arch/alpha/include/bus.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: bus.h,v 1.24 2006/05/12 20:48:19 brad Exp $ */
2: /* $NetBSD: bus.h,v 1.10 1996/12/02 22:19:32 cgd Exp $ */
3:
4: /*
5: * Copyright (c) 1996 Carnegie-Mellon University.
6: * All rights reserved.
7: *
8: * Author: Chris G. Demetriou
9: *
10: * Permission to use, copy, modify and distribute this software and
11: * its documentation is hereby granted, provided that both the copyright
12: * notice and this permission notice appear in all copies of the
13: * software, derivative works or modified versions, and any portions
14: * thereof, and that both notices appear in supporting documentation.
15: *
16: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19: *
20: * Carnegie Mellon requests users of this software to return to
21: *
22: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
23: * School of Computer Science
24: * Carnegie Mellon University
25: * Pittsburgh PA 15213-3890
26: *
27: * any improvements or extensions that they make and grant Carnegie the
28: * rights to redistribute these changes.
29: */
30:
31: #ifndef _ALPHA_BUS_H_
32: #define _ALPHA_BUS_H_
33:
34: /*
35: * Addresses (in bus space).
36: */
37: typedef u_long bus_addr_t;
38: typedef u_long bus_size_t;
39:
40: /*
41: * Access methods for bus space.
42: */
43: typedef struct alpha_bus_space *bus_space_tag_t;
44: typedef u_long bus_space_handle_t;
45:
46: struct alpha_bus_space {
47: /* cookie */
48: void *abs_cookie;
49:
50: /* mapping/unmapping */
51: int (*abs_map)(void *, bus_addr_t, bus_size_t,
52: int, bus_space_handle_t *);
53: void (*abs_unmap)(void *, bus_space_handle_t,
54: bus_size_t);
55: int (*abs_subregion)(void *, bus_space_handle_t,
56: bus_size_t, bus_size_t, bus_space_handle_t *);
57:
58: /* allocation/deallocation */
59: int (*abs_alloc)(void *, bus_addr_t, bus_addr_t,
60: bus_size_t, bus_size_t, bus_size_t, int,
61: bus_addr_t *, bus_space_handle_t *);
62: void (*abs_free)(void *, bus_space_handle_t,
63: bus_size_t);
64:
65: /* barrier */
66: void (*abs_barrier)(void *, bus_space_handle_t,
67: bus_size_t, bus_size_t, int);
68:
69: /* read (single) */
70: u_int8_t (*abs_r_1)(void *, bus_space_handle_t,
71: bus_size_t);
72: u_int16_t (*abs_r_2)(void *, bus_space_handle_t,
73: bus_size_t);
74: u_int32_t (*abs_r_4)(void *, bus_space_handle_t,
75: bus_size_t);
76: u_int64_t (*abs_r_8)(void *, bus_space_handle_t,
77: bus_size_t);
78:
79: /* read multiple */
80: void (*abs_rm_1)(void *, bus_space_handle_t,
81: bus_size_t, u_int8_t *, bus_size_t);
82: void (*abs_rm_2)(void *, bus_space_handle_t,
83: bus_size_t, u_int16_t *, bus_size_t);
84: void (*abs_rm_4)(void *, bus_space_handle_t,
85: bus_size_t, u_int32_t *, bus_size_t);
86: void (*abs_rm_8)(void *, bus_space_handle_t,
87: bus_size_t, u_int64_t *, bus_size_t);
88:
89: /* read region */
90: void (*abs_rr_1)(void *, bus_space_handle_t,
91: bus_size_t, u_int8_t *, bus_size_t);
92: void (*abs_rr_2)(void *, bus_space_handle_t,
93: bus_size_t, u_int16_t *, bus_size_t);
94: void (*abs_rr_4)(void *, bus_space_handle_t,
95: bus_size_t, u_int32_t *, bus_size_t);
96: void (*abs_rr_8)(void *, bus_space_handle_t,
97: bus_size_t, u_int64_t *, bus_size_t);
98:
99: /* write (single) */
100: void (*abs_w_1)(void *, bus_space_handle_t,
101: bus_size_t, u_int8_t);
102: void (*abs_w_2)(void *, bus_space_handle_t,
103: bus_size_t, u_int16_t);
104: void (*abs_w_4)(void *, bus_space_handle_t,
105: bus_size_t, u_int32_t);
106: void (*abs_w_8)(void *, bus_space_handle_t,
107: bus_size_t, u_int64_t);
108:
109: /* write multiple */
110: void (*abs_wm_1)(void *, bus_space_handle_t,
111: bus_size_t, const u_int8_t *, bus_size_t);
112: void (*abs_wm_2)(void *, bus_space_handle_t,
113: bus_size_t, const u_int16_t *, bus_size_t);
114: void (*abs_wm_4)(void *, bus_space_handle_t,
115: bus_size_t, const u_int32_t *, bus_size_t);
116: void (*abs_wm_8)(void *, bus_space_handle_t,
117: bus_size_t, const u_int64_t *, bus_size_t);
118:
119: /* write region */
120: void (*abs_wr_1)(void *, bus_space_handle_t,
121: bus_size_t, const u_int8_t *, bus_size_t);
122: void (*abs_wr_2)(void *, bus_space_handle_t,
123: bus_size_t, const u_int16_t *, bus_size_t);
124: void (*abs_wr_4)(void *, bus_space_handle_t,
125: bus_size_t, const u_int32_t *, bus_size_t);
126: void (*abs_wr_8)(void *, bus_space_handle_t,
127: bus_size_t, const u_int64_t *, bus_size_t);
128:
129: /* set multiple */
130: void (*abs_sm_1)(void *, bus_space_handle_t,
131: bus_size_t, u_int8_t, bus_size_t);
132: void (*abs_sm_2)(void *, bus_space_handle_t,
133: bus_size_t, u_int16_t, bus_size_t);
134: void (*abs_sm_4)(void *, bus_space_handle_t,
135: bus_size_t, u_int32_t, bus_size_t);
136: void (*abs_sm_8)(void *, bus_space_handle_t,
137: bus_size_t, u_int64_t, bus_size_t);
138:
139: /* set region */
140: void (*abs_sr_1)(void *, bus_space_handle_t,
141: bus_size_t, u_int8_t, bus_size_t);
142: void (*abs_sr_2)(void *, bus_space_handle_t,
143: bus_size_t, u_int16_t, bus_size_t);
144: void (*abs_sr_4)(void *, bus_space_handle_t,
145: bus_size_t, u_int32_t, bus_size_t);
146: void (*abs_sr_8)(void *, bus_space_handle_t,
147: bus_size_t, u_int64_t, bus_size_t);
148:
149: /* copy */
150: void (*abs_c_1)(void *, bus_space_handle_t, bus_size_t,
151: bus_space_handle_t, bus_size_t, bus_size_t);
152: void (*abs_c_2)(void *, bus_space_handle_t, bus_size_t,
153: bus_space_handle_t, bus_size_t, bus_size_t);
154: void (*abs_c_4)(void *, bus_space_handle_t, bus_size_t,
155: bus_space_handle_t, bus_size_t, bus_size_t);
156: void (*abs_c_8)(void *, bus_space_handle_t, bus_size_t,
157: bus_space_handle_t, bus_size_t, bus_size_t);
158:
159: /* OpenBSD extensions follows */
160:
161: /* read multiple raw */
162: void (*abs_rrm_2)(void *, bus_space_handle_t,
163: bus_size_t, u_int8_t *, bus_size_t);
164: void (*abs_rrm_4)(void *, bus_space_handle_t,
165: bus_size_t, u_int8_t *, bus_size_t);
166: void (*abs_rrm_8)(void *, bus_space_handle_t,
167: bus_size_t, u_int8_t *, bus_size_t);
168:
169: /* write multiple raw */
170: void (*abs_wrm_2)(void *, bus_space_handle_t,
171: bus_size_t, const u_int8_t *, bus_size_t);
172: void (*abs_wrm_4)(void *, bus_space_handle_t,
173: bus_size_t, const u_int8_t *, bus_size_t);
174: void (*abs_wrm_8)(void *, bus_space_handle_t,
175: bus_size_t, const u_int8_t *, bus_size_t);
176: };
177:
178:
179: /*
180: * Utility macros; INTERNAL USE ONLY.
181: */
182: #define __abs_c(a,b) __CONCAT(a,b)
183: #define __abs_opname(op,size) __abs_c(__abs_c(__abs_c(abs_,op),_),size)
184:
185: #define __abs_rs(sz, t, h, o) \
186: (*(t)->__abs_opname(r,sz))((t)->abs_cookie, h, o)
187: #define __abs_ws(sz, t, h, o, v) \
188: (*(t)->__abs_opname(w,sz))((t)->abs_cookie, h, o, v)
189: #define __abs_nonsingle(type, sz, t, h, o, a, c) \
190: (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, a, c)
191: #ifndef DEBUG
192: #define __abs_aligned_nonsingle(type, sz, t, h, o, a, c) \
193: __abs_nonsingle(type, sz, (t), (h), (o), (a), (c))
194:
195: #else
196: #define __abs_aligned_nonsingle(type, sz, t, h, o, a, c) \
197: do { \
198: if (((unsigned long)a & (sz - 1)) != 0) \
199: panic("bus non-single %d-byte unaligned (to %p) at %s:%d", \
200: sz, a, __FILE__, __LINE__); \
201: (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, a, c); \
202: } while (0)
203: #endif
204: #define __abs_set(type, sz, t, h, o, v, c) \
205: (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, v, c)
206: #define __abs_copy(sz, t, h1, o1, h2, o2, cnt) \
207: (*(t)->__abs_opname(c,sz))((t)->abs_cookie, h1, o1, h2, o2, cnt)
208:
209: /*
210: * Mapping and unmapping operations.
211: */
212: #define bus_space_map(t, a, s, c, hp) \
213: (*(t)->abs_map)((t)->abs_cookie, (a), (s), (c), (hp))
214: #define alpha_bus_space_map_noacct bus_space_map
215: #define bus_space_unmap(t, h, s) \
216: (*(t)->abs_unmap)((t)->abs_cookie, (h), (s))
217: #define alpha_bus_space_unmap_noacct bus_space_unmap
218: #define bus_space_subregion(t, h, o, s, hp) \
219: (*(t)->abs_subregion)((t)->abs_cookie, (h), (o), (s), (hp))
220:
221:
222: /*
223: * Allocation and deallocation operations.
224: */
225: #define bus_space_alloc(t, rs, re, s, a, b, c, ap, hp) \
226: (*(t)->abs_alloc)((t)->abs_cookie, (rs), (re), (s), (a), (b), \
227: (c), (ap), (hp))
228: #define bus_space_free(t, h, s) \
229: (*(t)->abs_free)((t)->abs_cookie, (h), (s))
230:
231:
232: /*
233: * Bus barrier operations.
234: */
235: #define bus_space_barrier(t, h, o, l, f) \
236: (*(t)->abs_barrier)((t)->abs_cookie, (h), (o), (l), (f))
237:
238: #define BUS_BARRIER_READ 0x01
239: #define BUS_BARRIER_WRITE 0x02
240: #define BUS_SPACE_BARRIER_READ BUS_BARRIER_READ
241: #define BUS_SPACE_BARRIER_WRITE BUS_BARRIER_WRITE
242:
243:
244: /*
245: * Bus read (single) operations.
246: */
247: #define bus_space_read_1(t, h, o) __abs_rs(1,(t),(h),(o))
248: #define bus_space_read_2(t, h, o) __abs_rs(2,(t),(h),(o))
249: #define bus_space_read_4(t, h, o) __abs_rs(4,(t),(h),(o))
250: #define bus_space_read_8(t, h, o) __abs_rs(8,(t),(h),(o))
251:
252:
253: /*
254: * Bus read multiple operations.
255: */
256: #define bus_space_read_multi_1(t, h, o, a, c) \
257: __abs_nonsingle(rm,1,(t),(h),(o),(a),(c))
258: #define bus_space_read_multi_2(t, h, o, a, c) \
259: __abs_aligned_nonsingle(rm,2,(t),(h),(o),(a),(c))
260: #define bus_space_read_multi_4(t, h, o, a, c) \
261: __abs_aligned_nonsingle(rm,4,(t),(h),(o),(a),(c))
262: #define bus_space_read_multi_8(t, h, o, a, c) \
263: __abs_aligned_nonsingle(rm,8,(t),(h),(o),(a),(c))
264:
265:
266: /*
267: * void bus_space_read_raw_multi_N(bus_space_tag_t tag,
268: * bus_space_handle_t bsh, bus_size_t offset,
269: * u_int8_t *addr, size_t count);
270: *
271: * Read `count' bytes in 2, 4 or 8 byte wide quantities from bus space
272: * described by tag/handle/offset and copy into buffer provided. The buffer
273: * must have proper alignment for the N byte wide entities. Furthermore
274: * possible byte-swapping should be done by these functions.
275: */
276:
277: #define bus_space_read_raw_multi_2(t, h, o, a, c) \
278: __abs_nonsingle(rrm,2,(t),(h),(o),(a),(c))
279: #define bus_space_read_raw_multi_4(t, h, o, a, c) \
280: __abs_nonsingle(rrm,4,(t),(h),(o),(a),(c))
281: #define bus_space_read_raw_multi_8(t, h, o, a, c) \
282: __abs_nonsingle(rrm,8,(t),(h),(o),(a),(c))
283:
284: /*
285: * Bus read region operations.
286: */
287: #define bus_space_read_region_1(t, h, o, a, c) \
288: __abs_nonsingle(rr,1,(t),(h),(o),(a),(c))
289: #define bus_space_read_region_2(t, h, o, a, c) \
290: __abs_aligned_nonsingle(rr,2,(t),(h),(o),(a),(c))
291: #define bus_space_read_region_4(t, h, o, a, c) \
292: __abs_aligned_nonsingle(rr,4,(t),(h),(o),(a),(c))
293: #define bus_space_read_region_8(t, h, o, a, c) \
294: __abs_aligned_nonsingle(rr,8,(t),(h),(o),(a),(c))
295:
296:
297: /*
298: * void bus_space_read_raw_region_N(bus_space_tag_t tag,
299: * bus_space_handle_t bsh, bus_size_t offset,
300: * u_int8_t *addr, size_t count);
301: *
302: * Read `count' bytes in 2, 4 or 8 byte wide quantities from bus space
303: * described by tag/handle and starting at `offset' from the
304: * buffer provided. The buffer must have proper alignment for the N byte
305: * wide entities. Furthermore possible byte-swapping should be done by
306: * these functions.
307: */
308:
309: #define bus_space_read_raw_region_2(t, h, o, a, c) \
310: bus_space_read_region_2((t), (h), (o), (u_int16_t *)(a), (c) >> 1)
311: #define bus_space_read_raw_region_4(t, h, o, a, c) \
312: bus_space_read_region_4((t), (h), (o), (u_int32_t *)(a), (c) >> 2)
313:
314: /*
315: * Bus write (single) operations.
316: */
317: #define bus_space_write_1(t, h, o, v) __abs_ws(1,(t),(h),(o),(v))
318: #define bus_space_write_2(t, h, o, v) __abs_ws(2,(t),(h),(o),(v))
319: #define bus_space_write_4(t, h, o, v) __abs_ws(4,(t),(h),(o),(v))
320: #define bus_space_write_8(t, h, o, v) __abs_ws(8,(t),(h),(o),(v))
321:
322:
323: /*
324: * Bus write multiple operations.
325: */
326: #define bus_space_write_multi_1(t, h, o, a, c) \
327: __abs_nonsingle(wm,1,(t),(h),(o),(a),(c))
328: #define bus_space_write_multi_2(t, h, o, a, c) \
329: __abs_aligned_nonsingle(wm,2,(t),(h),(o),(a),(c))
330: #define bus_space_write_multi_4(t, h, o, a, c) \
331: __abs_aligned_nonsingle(wm,4,(t),(h),(o),(a),(c))
332: #define bus_space_write_multi_8(t, h, o, a, c) \
333: __abs_aligned_nonsingle(wm,8,(t),(h),(o),(a),(c))
334:
335: /*
336: * void bus_space_write_raw_multi_N(bus_space_tag_t tag,
337: * bus_space_handle_t bsh, bus_size_t offset,
338: * u_int8_t *addr, size_t count);
339: *
340: * Write `count' bytes in 2, 4 or 8 byte wide quantities from the buffer
341: * provided to bus space described by tag/handle/offset. The buffer
342: * must have proper alignment for the N byte wide entities. Furthermore
343: * possible byte-swapping should be done by these functions.
344: */
345:
346: #define bus_space_write_raw_multi_2(t, h, o, a, c) \
347: __abs_nonsingle(wrm,2,(t),(h),(o),(a),(c))
348: #define bus_space_write_raw_multi_4(t, h, o, a, c) \
349: __abs_nonsingle(wrm,4,(t),(h),(o),(a),(c))
350: #define bus_space_write_raw_multi_8(t, h, o, a, c) \
351: __abs_nonsingle(wrm,8,(t),(h),(o),(a),(c))
352:
353: /*
354: * Bus write region operations.
355: */
356: #define bus_space_write_region_1(t, h, o, a, c) \
357: __abs_nonsingle(wr,1,(t),(h),(o),(a),(c))
358: #define bus_space_write_region_2(t, h, o, a, c) \
359: __abs_aligned_nonsingle(wr,2,(t),(h),(o),(a),(c))
360: #define bus_space_write_region_4(t, h, o, a, c) \
361: __abs_aligned_nonsingle(wr,4,(t),(h),(o),(a),(c))
362: #define bus_space_write_region_8(t, h, o, a, c) \
363: __abs_aligned_nonsingle(wr,8,(t),(h),(o),(a),(c))
364:
365:
366: /*
367: * void bus_space_write_raw_region_N(bus_space_tag_t tag,
368: * bus_space_handle_t bsh, bus_size_t offset,
369: * const u_int8_t *addr, size_t count);
370: *
371: * Write `count' bytes in 2, 4 or 8 byte wide quantities to bus space
372: * described by tag/handle and starting at `offset' from the
373: * buffer provided. The buffer must have proper alignment for the N byte
374: * wide entities. Furthermore possible byte-swapping should be done by
375: * these functions.
376: */
377:
378: #define bus_space_write_raw_region_2(t, h, o, a, c) \
379: bus_space_write_region_2((t), (h), (o), (const u_int16_t *)(a), (c) >> 1)
380: #define bus_space_write_raw_region_4(t, h, o, a, c) \
381: bus_space_write_region_4((t), (h), (o), (const u_int32_t *)(a), (c) >> 2)
382:
383: /*
384: * Set multiple operations.
385: */
386: #define bus_space_set_multi_1(t, h, o, v, c) \
387: __abs_set(sm,1,(t),(h),(o),(v),(c))
388: #define bus_space_set_multi_2(t, h, o, v, c) \
389: __abs_set(sm,2,(t),(h),(o),(v),(c))
390: #define bus_space_set_multi_4(t, h, o, v, c) \
391: __abs_set(sm,4,(t),(h),(o),(v),(c))
392: #define bus_space_set_multi_8(t, h, o, v, c) \
393: __abs_set(sm,8,(t),(h),(o),(v),(c))
394:
395:
396: /*
397: * Set region operations.
398: */
399: #define bus_space_set_region_1(t, h, o, v, c) \
400: __abs_set(sr,1,(t),(h),(o),(v),(c))
401: #define bus_space_set_region_2(t, h, o, v, c) \
402: __abs_set(sr,2,(t),(h),(o),(v),(c))
403: #define bus_space_set_region_4(t, h, o, v, c) \
404: __abs_set(sr,4,(t),(h),(o),(v),(c))
405: #define bus_space_set_region_8(t, h, o, v, c) \
406: __abs_set(sr,8,(t),(h),(o),(v),(c))
407:
408:
409: /*
410: * Copy operations.
411: */
412: #define bus_space_copy_1(t, h1, o1, h2, o2, c) \
413: __abs_copy(1, t, h1, o1, h2, o2, c)
414: #define bus_space_copy_2(t, h1, o1, h2, o2, c) \
415: __abs_copy(2, t, h1, o1, h2, o2, c)
416: #define bus_space_copy_4(t, h1, o1, h2, o2, c) \
417: __abs_copy(4, t, h1, o1, h2, o2, c)
418: #define bus_space_copy_8(t, h1, o1, h2, o2, c) \
419: __abs_copy(8, t, h1, o1, h2, o2, c)
420:
421: /*
422: * Bus DMA methods.
423: */
424:
425: /*
426: * Flags used in various bus DMA methods.
427: */
428: #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */
429: #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */
430: #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */
431: #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */
432: #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */
433: #define BUS_DMA_BUS2 0x020
434: #define BUS_DMA_BUS3 0x040
435: #define BUS_DMA_24BIT 0x080 /* isadma map */
436: #define BUS_DMA_STREAMING 0x100 /* hint: sequential, unidirectional */
437: #define BUS_DMA_READ 0x200 /* mapping is device -> memory only */
438: #define BUS_DMA_WRITE 0x400 /* mapping is memory -> device only */
439:
440: /*
441: * Private flags stored in the DMA map.
442: */
443: #define DMAMAP_NO_COALESCE 0x40000000 /* don't coalesce adjacent
444: segments */
445:
446: /* Forwards needed by prototypes below. */
447: struct mbuf;
448: struct uio;
449: struct alpha_sgmap;
450:
451: /*
452: * Operations performed by bus_dmamap_sync().
453: */
454: #define BUS_DMASYNC_PREREAD 0x01
455: #define BUS_DMASYNC_POSTREAD 0x02
456: #define BUS_DMASYNC_PREWRITE 0x04
457: #define BUS_DMASYNC_POSTWRITE 0x08
458:
459: /*
460: * alpha_bus_t
461: *
462: * Busses supported by NetBSD/alpha, used by internal
463: * utility functions. NOT TO BE USED BY MACHINE-INDEPENDENT
464: * CODE!
465: */
466: typedef enum {
467: ALPHA_BUS_TURBOCHANNEL,
468: ALPHA_BUS_PCI,
469: ALPHA_BUS_EISA,
470: ALPHA_BUS_ISA,
471: ALPHA_BUS_TLSB,
472: } alpha_bus_t;
473:
474: typedef struct alpha_bus_dma_tag *bus_dma_tag_t;
475: typedef struct alpha_bus_dmamap *bus_dmamap_t;
476:
477: /*
478: * bus_dma_segment_t
479: *
480: * Describes a single contiguous DMA transaction. Values
481: * are suitable for programming into DMA registers.
482: */
483: struct alpha_bus_dma_segment {
484: bus_addr_t ds_addr; /* DMA address */
485: bus_size_t ds_len; /* length of transfer */
486: };
487: typedef struct alpha_bus_dma_segment bus_dma_segment_t;
488:
489: /*
490: * bus_dma_tag_t
491: *
492: * A machine-dependent opaque type describing the implementation of
493: * DMA for a given bus.
494: */
495: struct alpha_bus_dma_tag {
496: void *_cookie; /* cookie used in the guts */
497: bus_addr_t _wbase; /* DMA window base */
498:
499: /*
500: * The following two members are used to chain DMA windows
501: * together. If, during the course of a map load, the
502: * resulting physical memory address is too large to
503: * be addressed by the window, the next window will be
504: * attempted. These would be chained together like so:
505: *
506: * direct -> sgmap -> NULL
507: * or
508: * sgmap -> NULL
509: * or
510: * direct -> NULL
511: *
512: * If the window size is 0, it will not be checked (e.g.
513: * TurboChannel DMA).
514: */
515: bus_size_t _wsize;
516: struct alpha_bus_dma_tag *_next_window;
517:
518: /*
519: * Some chipsets have a built-in boundary constraint, independent
520: * of what the device requests. This allows that boundary to
521: * be specified. If the device has a more restrictive constraint,
522: * the map will use that, otherwise this boundary will be used.
523: * This value is ignored if 0.
524: */
525: bus_size_t _boundary;
526:
527: /*
528: * A chipset may have more than one SGMAP window, so SGMAP
529: * windows also get a pointer to their SGMAP state.
530: */
531: struct alpha_sgmap *_sgmap;
532:
533: /*
534: * The SGMAP MMU implements a prefetch FIFO to keep data
535: * moving down the pipe, when doing host->bus DMA writes.
536: * The threshold (distance until the next page) used to
537: * trigger the prefetch is differnet on different chipsets,
538: * and we need to know what it is in order to know whether
539: * or not to allocate a spill page.
540: */
541: bus_size_t _pfthresh;
542:
543: /*
544: * Internal-use only utility methods. NOT TO BE USED BY
545: * MACHINE-INDEPENDENT CODE!
546: */
547: bus_dma_tag_t (*_get_tag)(bus_dma_tag_t, alpha_bus_t);
548:
549: /*
550: * DMA mapping methods.
551: */
552: int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int,
553: bus_size_t, bus_size_t, int, bus_dmamap_t *);
554: void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t);
555: int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *,
556: bus_size_t, struct proc *, int);
557: int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t,
558: struct mbuf *, int);
559: int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t,
560: struct uio *, int);
561: int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t,
562: bus_dma_segment_t *, int, bus_size_t, int);
563: void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t);
564: void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t,
565: bus_addr_t, bus_size_t, int);
566:
567: /*
568: * DMA memory utility functions.
569: */
570: int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t,
571: bus_size_t, bus_dma_segment_t *, int, int *, int);
572: void (*_dmamem_free)(bus_dma_tag_t,
573: bus_dma_segment_t *, int);
574: int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *,
575: int, size_t, caddr_t *, int);
576: void (*_dmamem_unmap)(bus_dma_tag_t, caddr_t, size_t);
577: paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *,
578: int, off_t, int, int);
579: };
580:
581: #define alphabus_dma_get_tag(t, b) \
582: (*(t)->_get_tag)(t, b)
583:
584: #define bus_dmamap_create(t, s, n, m, b, f, p) \
585: (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p))
586: #define bus_dmamap_destroy(t, p) \
587: (*(t)->_dmamap_destroy)((t), (p))
588: #define bus_dmamap_load(t, m, b, s, p, f) \
589: (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f))
590: #define bus_dmamap_load_mbuf(t, m, b, f) \
591: (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f))
592: #define bus_dmamap_load_uio(t, m, u, f) \
593: (*(t)->_dmamap_load_uio)((t), (m), (u), (f))
594: #define bus_dmamap_load_raw(t, m, sg, n, s, f) \
595: (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f))
596: #define bus_dmamap_unload(t, p) \
597: (void)(t), \
598: (*(p)->_dm_window->_dmamap_unload)((p)->_dm_window, (p))
599: #define bus_dmamap_sync(t, p, a, s, op) \
600: (void)(t), \
601: (*(p)->_dm_window->_dmamap_sync)((p)->_dm_window, (p), (a), (s), (op))
602: #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \
603: (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f))
604: #define bus_dmamem_free(t, sg, n) \
605: (*(t)->_dmamem_free)((t), (sg), (n))
606: #define bus_dmamem_map(t, sg, n, s, k, f) \
607: (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f))
608: #define bus_dmamem_unmap(t, k, s) \
609: (*(t)->_dmamem_unmap)((t), (k), (s))
610: #define bus_dmamem_mmap(t, sg, n, o, p, f) \
611: (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f))
612:
613: /*
614: * bus_dmamap_t
615: *
616: * Describes a DMA mapping.
617: */
618: struct alpha_bus_dmamap {
619: /*
620: * PRIVATE MEMBERS: not for use by machine-independent code.
621: */
622: bus_size_t _dm_size; /* largest DMA transfer mappable */
623: int _dm_segcnt; /* number of segs this map can map */
624: bus_size_t _dm_maxsegsz; /* largest possible segment */
625: bus_size_t _dm_boundary; /* don't cross this */
626: int _dm_flags; /* misc. flags */
627:
628: /*
629: * Private cookie to be used by the DMA back-end.
630: */
631: void *_dm_cookie;
632:
633: /*
634: * The DMA window that we ended up being mapped in.
635: */
636: bus_dma_tag_t _dm_window;
637:
638: /*
639: * PUBLIC MEMBERS: these are used by machine-independent code.
640: */
641: bus_size_t dm_mapsize; /* size of the mapping */
642: int dm_nsegs; /* # valid segments in mapping */
643: bus_dma_segment_t dm_segs[1]; /* segments; variable length */
644: };
645:
646: #ifdef _ALPHA_BUS_DMA_PRIVATE
647: int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
648: bus_size_t, int, bus_dmamap_t *);
649: void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
650:
651: int _bus_dmamap_load_direct(bus_dma_tag_t, bus_dmamap_t,
652: void *, bus_size_t, struct proc *, int);
653: int _bus_dmamap_load_mbuf_direct(bus_dma_tag_t,
654: bus_dmamap_t, struct mbuf *, int);
655: int _bus_dmamap_load_uio_direct(bus_dma_tag_t,
656: bus_dmamap_t, struct uio *, int);
657: int _bus_dmamap_load_raw_direct(bus_dma_tag_t,
658: bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int);
659:
660: void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t);
661: void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
662: bus_size_t, int);
663:
664: int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size,
665: bus_size_t alignment, bus_size_t boundary,
666: bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags);
667: int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size,
668: bus_size_t alignment, bus_size_t boundary,
669: bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
670: paddr_t low, paddr_t high);
671: void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs,
672: int nsegs);
673: int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs,
674: int nsegs, size_t size, caddr_t *kvap, int flags);
675: void _bus_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva,
676: size_t size);
677: paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs,
678: int nsegs, off_t off, int prot, int flags);
679: #endif /* _ALPHA_BUS_DMA_PRIVATE */
680:
681: #endif /* _ALPHA_BUS_H_ */
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