xref: /freebsd/sys/dev/ata/ata-dma.c (revision 41466b50c1d5bfd1cf6adaae547a579a75d7c04e)
1 /*-
2  * Copyright (c) 1998,1999,2000,2001 S�ren Schmidt <sos@FreeBSD.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer,
10  *    without modification, immediately at the beginning of the file.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. The name of the author may not be used to endorse or promote products
15  *    derived from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * $FreeBSD$
29  */
30 
31 #include "pci.h"
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/ata.h>
35 #include <sys/bio.h>
36 #include <sys/malloc.h>
37 #include <sys/bus.h>
38 #include <sys/disk.h>
39 #include <sys/devicestat.h>
40 #include <vm/vm.h>
41 #include <vm/pmap.h>
42 #include <pci/pcivar.h>
43 #include <machine/bus.h>
44 #include <sys/rman.h>
45 #include <dev/ata/ata-all.h>
46 
47 /* prototypes */
48 static void cyrix_timing(struct ata_softc *, int, int);
49 static void promise_timing(struct ata_softc *, int, int);
50 static void hpt_timing(struct ata_softc *, int, int);
51 
52 /* misc defines */
53 #ifdef __alpha__
54 #undef vtophys
55 #define vtophys(va)	alpha_XXX_dmamap((vm_offset_t)va)
56 #endif
57 #define ATAPI_DEVICE(scp, device) \
58 	((device == ATA_MASTER && scp->devices & ATA_ATAPI_MASTER) || \
59 	 (device == ATA_SLAVE && scp->devices & ATA_ATAPI_SLAVE))
60 
61 
62 void *
63 ata_dmaalloc(struct ata_softc *scp, int device)
64 {
65     void *dmatab;
66 
67     if ((dmatab = malloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT))) {
68 	if (((uintptr_t)dmatab >> PAGE_SHIFT) ^
69 	    (((uintptr_t)dmatab + PAGE_SIZE - 1) >> PAGE_SHIFT)) {
70 	    ata_printf(scp, device, "dmatab crosses page boundary, no DMA\n");
71 	    free(dmatab, M_DEVBUF);
72 	    dmatab = NULL;
73 	}
74     }
75     return dmatab;
76 }
77 
78 void
79 ata_dmainit(struct ata_softc *scp, int device,
80 	    int apiomode, int wdmamode, int udmamode)
81 {
82     device_t parent = device_get_parent(scp->dev);
83     int devno = (scp->channel << 1) + ATA_DEV(device);
84     int error;
85 
86     /* set our most pessimistic default mode */
87     scp->mode[ATA_DEV(device)] = ATA_PIO;
88 
89     if (!scp->r_bmio)
90 	return;
91 
92     /* if simplex controller, only allow DMA on primary channel */
93     if (scp->channel == 1) {
94 	ATA_OUTB(scp->r_bmio, ATA_BMSTAT_PORT,
95 		 ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) &
96 		 (ATA_BMSTAT_DMA_MASTER | ATA_BMSTAT_DMA_SLAVE));
97 	if (ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) & ATA_BMSTAT_DMA_SIMPLEX) {
98 	    ata_printf(scp, device, "simplex device, DMA on primary only\n");
99 	    return;
100 	}
101     }
102 
103     /* DMA engine address alignment is usually 1 word (2 bytes) */
104     scp->alignment = 0x1;
105 
106 #if 1
107     if (udmamode > 2 && !ATA_PARAM(scp, device)->hwres_cblid) {
108 	ata_printf(scp, device,
109 		   "DMA limited to UDMA33, non-ATA66 compliant cable\n");
110 	udmamode = 2;
111     }
112 #endif
113     switch (scp->chiptype) {
114 
115     case 0x248a8086:	/* Intel ICH3 mobile */
116     case 0x248b8086:	/* Intel ICH3 */
117     case 0x244a8086:	/* Intel ICH2 mobile */
118     case 0x244b8086:	/* Intel ICH2 */
119 	if (udmamode >= 5) {
120 	    int32_t mask48, new48;
121 	    int16_t word54;
122 
123 	    word54 = pci_read_config(parent, 0x54, 2);
124 	    if (word54 & (0x10 << devno)) {
125 	        error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
126 				    ATA_UDMA5,  ATA_C_F_SETXFER,ATA_WAIT_READY);
127 	    	if (bootverbose)
128 		    ata_printf(scp, device,
129 			       "%s setting UDMA5 on Intel chip\n",
130 			       (error) ? "failed" : "success");
131 		if (!error) {
132 		    mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
133 		    new48 = (1 << devno) + (1 << (16 + (devno << 2)));
134 		    pci_write_config(parent, 0x48,
135 				     (pci_read_config(parent, 0x48, 4) &
136 				     ~mask48) | new48, 4);
137 	    	    pci_write_config(parent, 0x54, word54 | (0x1000<<devno), 2);
138 		    scp->mode[ATA_DEV(device)] = ATA_UDMA5;
139 		    return;
140 		}
141 	    }
142 	}
143 	/* make sure eventual ATA100 mode from the BIOS is disabled */
144 	pci_write_config(parent, 0x54,
145 			 pci_read_config(parent, 0x54, 2) & ~(0x1000<<devno),2);
146 	/* FALLTHROUGH */
147 
148     case 0x24118086:    /* Intel ICH */
149     case 0x76018086:    /* Intel ICH */
150 	if (udmamode >= 4) {
151 	    int32_t mask48, new48;
152 	    int16_t word54;
153 
154 	    word54 = pci_read_config(parent, 0x54, 2);
155 	    if (word54 & (0x10 << devno)) {
156 	        error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
157 				    ATA_UDMA4,  ATA_C_F_SETXFER,ATA_WAIT_READY);
158 	    	if (bootverbose)
159 		    ata_printf(scp, device,
160 			       "%s setting UDMA4 on Intel chip\n",
161 			       (error) ? "failed" : "success");
162 		if (!error) {
163 		    mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
164 		    new48 = (1 << devno) + (2 << (16 + (devno << 2)));
165 		    pci_write_config(parent, 0x48,
166 				     (pci_read_config(parent, 0x48, 4) &
167 				     ~mask48) | new48, 4);
168 		    pci_write_config(parent, 0x54, word54 | (1 << devno), 2);
169 		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
170 		    return;
171 		}
172 	    }
173 	}
174 	/* make sure eventual ATA66 mode from the BIOS is disabled */
175 	pci_write_config(parent, 0x54,
176 			 pci_read_config(parent, 0x54, 2) & ~(1 << devno), 2);
177 	/* FALLTHROUGH */
178 
179     case 0x71118086:	/* Intel PIIX4 */
180     case 0x84CA8086:	/* Intel PIIX4 */
181     case 0x71998086:	/* Intel PIIX4e */
182     case 0x24218086:	/* Intel ICH0 */
183 	if (udmamode >= 2) {
184 	    int32_t mask48, new48;
185 
186 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
187 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
188 	    if (bootverbose)
189 		ata_printf(scp, device, "%s setting UDMA2 on Intel chip\n",
190 			   (error) ? "failed" : "success");
191 	    if (!error) {
192 		mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
193 		new48 = (1 << devno) + (2 << (16 + (devno << 2)));
194 		pci_write_config(parent, 0x48,
195 				 (pci_read_config(parent, 0x48, 4) &
196 				 ~mask48) | new48, 4);
197 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
198 		return;
199 	    }
200 	}
201 	/* make sure eventual ATA33 mode from the BIOS is disabled */
202 	pci_write_config(parent, 0x48,
203 			 pci_read_config(parent, 0x48, 4) & ~(1 << devno), 4);
204 	/* FALLTHROUGH */
205 
206     case 0x70108086:	/* Intel PIIX3 */
207 	if (wdmamode >= 2 && apiomode >= 4) {
208 	    int32_t mask40, new40, mask44, new44;
209 
210 	    /* if SITRE not set doit for both channels */
211 	    if (!((pci_read_config(parent,0x40,4)>>(scp->channel<<8))&0x4000)) {
212 		new40 = pci_read_config(parent, 0x40, 4);
213 		new44 = pci_read_config(parent, 0x44, 4);
214 		if (!(new40 & 0x00004000)) {
215 		    new44 &= ~0x0000000f;
216 		    new44 |= ((new40&0x00003000)>>10)|((new40&0x00000300)>>8);
217 		}
218 		if (!(new40 & 0x40000000)) {
219 		    new44 &= ~0x000000f0;
220 		    new44 |= ((new40&0x30000000)>>22)|((new40&0x03000000)>>20);
221 		}
222 		new40 |= 0x40004000;
223 		pci_write_config(parent, 0x40, new40, 4);
224 		pci_write_config(parent, 0x44, new44, 4);
225 	    }
226 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
227 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
228 	    if (bootverbose)
229 		ata_printf(scp, device, "%s setting WDMA2 on Intel chip\n",
230 			   (error) ? "failed" : "success");
231 	    if (!error) {
232 		if (device == ATA_MASTER) {
233 		    mask40 = 0x0000330f;
234 		    new40 = 0x00002307;
235 		    mask44 = 0;
236 		    new44 = 0;
237 		}
238 		else {
239 		    mask40 = 0x000000f0;
240 		    new40 = 0x00000070;
241 		    mask44 = 0x0000000f;
242 		    new44 = 0x0000000b;
243 		}
244 		if (scp->channel) {
245 		    mask40 <<= 16;
246 		    new40 <<= 16;
247 		    mask44 <<= 4;
248 		    new44 <<= 4;
249 		}
250 		pci_write_config(parent, 0x40,
251 				 (pci_read_config(parent, 0x40, 4) & ~mask40)|
252  				 new40, 4);
253 		pci_write_config(parent, 0x44,
254 				 (pci_read_config(parent, 0x44, 4) & ~mask44)|
255  				 new44, 4);
256 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
257 		return;
258 	    }
259 	}
260 	/* we could set PIO mode timings, but we assume the BIOS did that */
261 	break;
262 
263     case 0x12308086:	/* Intel PIIX */
264 	if (wdmamode >= 2 && apiomode >= 4) {
265 	    int32_t word40;
266 
267 	    word40 = pci_read_config(parent, 0x40, 4);
268 	    word40 >>= scp->channel * 16;
269 
270 	    /* Check for timing config usable for DMA on controller */
271 	    if (!((word40 & 0x3300) == 0x2300 &&
272 		  ((word40 >> (device == ATA_MASTER ? 0 : 4)) & 1) == 1))
273 		break;
274 
275 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
276 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
277 	    if (bootverbose)
278 		ata_printf(scp, device,
279 			   "%s setting WDMA2 on Intel chip\n",
280 			   (error) ? "failed" : "success");
281 	    if (!error) {
282 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
283 		return;
284 	    }
285 	}
286 	break;
287 
288     case 0x522910b9:	/* AcerLabs Aladdin IV/V */
289 	/* the older Aladdin doesn't support ATAPI DMA on both master & slave */
290 	if (pci_get_revid(parent) < 0xC2 &&
291 	    scp->devices & ATA_ATAPI_MASTER && scp->devices & ATA_ATAPI_SLAVE) {
292 	    ata_printf(scp, device,
293 		       "Aladdin: two atapi devices on this channel, no DMA\n");
294 	    break;
295 	}
296 	if (udmamode >= 5 && pci_get_revid(parent) >= 0xC4) {
297 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
298 				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
299 	    if (bootverbose)
300 		ata_printf(scp, device,
301 			   "%s setting UDMA5 on Acer chip\n",
302 			   (error) ? "failed" : "success");
303 	    if (!error) {
304 		int32_t word54 = pci_read_config(parent, 0x54, 4);
305 
306 		pci_write_config(parent, 0x4b,
307 				 pci_read_config(parent, 0x4b, 1) | 0x01, 1);
308 		word54 &= ~(0x000f000f << (devno << 2));
309 		word54 |= (0x000f0005 << (devno << 2));
310 		pci_write_config(parent, 0x54, word54, 4);
311 		pci_write_config(parent, 0x53,
312 				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
313 		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
314 		return;
315 	    }
316 	}
317 	if (udmamode >= 4 && pci_get_revid(parent) >= 0xC2) {
318 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
319 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
320 	    if (bootverbose)
321 		ata_printf(scp, device,
322 			   "%s setting UDMA4 on Acer chip\n",
323 			   (error) ? "failed" : "success");
324 	    if (!error) {
325 		int32_t word54 = pci_read_config(parent, 0x54, 4);
326 
327 		pci_write_config(parent, 0x4b,
328 				 pci_read_config(parent, 0x4b, 1) | 0x01, 1);
329 		word54 &= ~(0x000f000f << (devno << 2));
330 		word54 |= (0x00080005 << (devno << 2));
331 		pci_write_config(parent, 0x54, word54, 4);
332 		pci_write_config(parent, 0x53,
333 				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
334 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
335 		return;
336 	    }
337 	}
338 	if (udmamode >= 2 && pci_get_revid(parent) >= 0x20) {
339 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
340 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
341 	    if (bootverbose)
342 		ata_printf(scp, device,
343 			   "%s setting UDMA2 on Acer chip\n",
344 			   (error) ? "failed" : "success");
345 	    if (!error) {
346 		int32_t word54 = pci_read_config(parent, 0x54, 4);
347 
348 		word54 &= ~(0x000f000f << (devno << 2));
349 		word54 |= (0x000a0005 << (devno << 2));
350 		pci_write_config(parent, 0x54, word54, 4);
351 		pci_write_config(parent, 0x53,
352 				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
353 		scp->flags |= ATA_ATAPI_DMA_RO;
354 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
355 		return;
356 	    }
357 	}
358 
359 	/* make sure eventual UDMA mode from the BIOS is disabled */
360 	pci_write_config(parent, 0x56, pci_read_config(parent, 0x56, 2) &
361 				       ~(0x0008 << (devno << 2)), 2);
362 
363 	if (wdmamode >= 2 && apiomode >= 4) {
364 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
365 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
366 	    if (bootverbose)
367 		ata_printf(scp, device,
368 			   "%s setting WDMA2 on Acer chip\n",
369 			   (error) ? "failed" : "success");
370 	    if (!error) {
371 		pci_write_config(parent, 0x53,
372 				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
373 		scp->flags |= ATA_ATAPI_DMA_RO;
374 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
375 		return;
376 	    }
377 	}
378 	pci_write_config(parent, 0x53,
379 			 (pci_read_config(parent, 0x53, 1) & ~0x01) | 0x02, 1);
380 	/* we could set PIO mode timings, but we assume the BIOS did that */
381 	break;
382 
383     case 0x74111022:	/* AMD 766 */
384 	if (udmamode >= 5) {
385 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
386 				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
387 	    if (bootverbose)
388 		ata_printf(scp, device,
389 			   "%s setting UDMA5 on AMD chip\n",
390 			   (error) ? "failed" : "success");
391 	    if (!error) {
392 	        pci_write_config(parent, 0x53 - devno, 0xc6, 1);
393 		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
394 		return;
395 	    }
396 	}
397 	/* FALLTHROUGH */
398 
399     case 0x74091022:	/* AMD 756 */
400 	if (udmamode >= 4) {
401 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
402 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
403 	    if (bootverbose)
404 		ata_printf(scp, device,
405 			   "%s setting UDMA4 on AMD chip\n",
406 			   (error) ? "failed" : "success");
407 	    if (!error) {
408 	        pci_write_config(parent, 0x53 - devno, 0xc5, 1);
409 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
410 		return;
411 	    }
412 	}
413 	goto via_82c586;
414 
415     case 0x05711106:	/* VIA 82C571, 82C586, 82C596, 82C686 */
416 	if (ata_find_dev(parent, 0x06861106, 0x40) ||
417 	    ata_find_dev(parent, 0x30741106, 0)) {		/* 82C686b */
418 	    if (udmamode >= 5) {
419 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
420 				    ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
421 		if (bootverbose)
422 		    ata_printf(scp, device,
423 			       "%s setting UDMA5 on VIA chip\n",
424 			       (error) ? "failed" : "success");
425 		if (!error) {
426 		    pci_write_config(parent, 0x53 - devno, 0xf0, 1);
427 		    scp->mode[ATA_DEV(device)] = ATA_UDMA5;
428 		    return;
429 		}
430 	    }
431 	    if (udmamode >= 4) {
432 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
433 				    ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
434 		if (bootverbose)
435 		    ata_printf(scp, device,
436 			       "%s setting UDMA4 on VIA chip\n",
437 			       (error) ? "failed" : "success");
438 		if (!error) {
439 		    pci_write_config(parent, 0x53 - devno, 0xf1, 1);
440 		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
441 		    return;
442 		}
443 	    }
444 	    if (udmamode >= 2) {
445 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
446 				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
447 		if (bootverbose)
448 		    ata_printf(scp, device,
449 			       "%s setting UDMA2 on VIA chip\n",
450 			       (error) ? "failed" : "success");
451 		if (!error) {
452 		    pci_write_config(parent, 0x53 - devno, 0xf4, 1);
453 		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
454 		    return;
455 		}
456 	    }
457 	}
458 	else if (ata_find_dev(parent, 0x06861106, 0) ||		/* 82C686a */
459 		 ata_find_dev(parent, 0x05961106, 0x12)) {	/* 82C596b */
460 	    if (udmamode >= 4) {
461 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
462 				    ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
463 		if (bootverbose)
464 		    ata_printf(scp, device,
465 			       "%s setting UDMA4 on VIA chip\n",
466 			       (error) ? "failed" : "success");
467 		if (!error) {
468 		    pci_write_config(parent, 0x53 - devno, 0xe8, 1);
469 		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
470 		    return;
471 		}
472 	    }
473 	    if (udmamode >= 2) {
474 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
475 				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
476 		if (bootverbose)
477 		    ata_printf(scp, device,
478 			       "%s setting UDMA2 on VIA chip\n",
479 			       (error) ? "failed" : "success");
480 		if (!error) {
481 		    pci_write_config(parent, 0x53 - devno, 0xea, 1);
482 		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
483 		    return;
484 		}
485 	    }
486 	}
487 	else if (ata_find_dev(parent, 0x05961106, 0) ||		/* 82C596a */
488 		 ata_find_dev(parent, 0x05861106, 0x03)) {	/* 82C586b */
489 via_82c586:
490 	    if (udmamode >= 2) {
491 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
492 				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
493 		if (bootverbose)
494 		    ata_printf(scp, device, "%s setting UDMA2 on %s chip\n",
495 			       (error) ? "failed" : "success",
496 			       ((scp->chiptype == 0x74091022) ||
497 				(scp->chiptype == 0x74111022)) ? "AMD" : "VIA");
498 		if (!error) {
499 	            pci_write_config(parent, 0x53 - devno, 0xc0, 1);
500 		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
501 		    return;
502 		}
503 	    }
504 	}
505 	if (wdmamode >= 2 && apiomode >= 4) {
506 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
507 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
508 	    if (bootverbose)
509 		ata_printf(scp, device, "%s setting WDMA2 on %s chip\n",
510 			   (error) ? "failed" : "success",
511 			   (scp->chiptype == 0x74091022) ? "AMD" : "VIA");
512 	    if (!error) {
513 	        pci_write_config(parent, 0x53 - devno, 0x0b, 1);
514 	        pci_write_config(parent, 0x4b - devno, 0x31, 1);
515 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
516 		return;
517 	    }
518 	}
519 	/* we could set PIO mode timings, but we assume the BIOS did that */
520 	break;
521 
522     case 0x55131039:	/* SiS 5591 */
523 	if (udmamode >= 2 && pci_get_revid(parent) > 0xc1) {
524 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
525 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
526 	    if (bootverbose)
527 		ata_printf(scp, device,
528 			   "%s setting UDMA2 on SiS chip\n",
529 			   (error) ? "failed" : "success");
530 	    if (!error) {
531 		pci_write_config(parent, 0x40 + (devno << 1), 0xa301, 2);
532 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
533 		return;
534 	    }
535 	}
536 	if (wdmamode >=2 && apiomode >= 4) {
537 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
538 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
539 	    if (bootverbose)
540 		ata_printf(scp, device,
541 			   "%s setting WDMA2 on SiS chip\n",
542 			   (error) ? "failed" : "success");
543 	    if (!error) {
544 		pci_write_config(parent, 0x40 + (devno << 1), 0x0301, 2);
545 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
546 		return;
547 	    }
548 	}
549 	/* we could set PIO mode timings, but we assume the BIOS did that */
550 	break;
551 
552     case 0x06491095:	/* CMD 649 ATA100 controller */
553 	if (udmamode >= 5) {
554 	    u_int8_t umode;
555 
556 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
557 				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
558 	    if (bootverbose)
559 		ata_printf(scp, device, "%s setting UDMA5 on CMD chip\n",
560 			   (error) ? "failed" : "success");
561 	    if (!error) {
562 		umode = pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1);
563 		umode &= ~(device == ATA_MASTER ? 0x35 : 0xca);
564 		umode |= (device == ATA_MASTER ? 0x05 : 0x0a);
565 		pci_write_config(parent, scp->channel ? 0x7b : 0x73, umode, 1);
566 		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
567 		return;
568 	    }
569 	}
570 	/* FALLTHROUGH */
571 
572     case 0x06481095:	/* CMD 648 ATA66 controller */
573 	if (udmamode >= 4) {
574 	    u_int8_t umode;
575 
576 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
577 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
578 	    if (bootverbose)
579 		ata_printf(scp, device, "%s setting UDMA4 on CMD chip\n",
580 			   (error) ? "failed" : "success");
581 	    if (!error) {
582 		umode = pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1);
583 		umode &= ~(device == ATA_MASTER ? 0x35 : 0xca);
584 		umode |= (device == ATA_MASTER ? 0x15 : 0x4a);
585 		pci_write_config(parent, scp->channel ? 0x7b : 0x73, umode, 1);
586 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
587 		return;
588 	    }
589 	}
590 	if (udmamode >= 2) {
591 	    u_int8_t umode;
592 
593 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
594 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
595 	    if (bootverbose)
596 		ata_printf(scp, device, "%s setting UDMA2 on CMD chip\n",
597 			   (error) ? "failed" : "success");
598 	    if (!error) {
599 		umode = pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1);
600 		umode &= ~(device == ATA_MASTER ? 0x35 : 0xca);
601 		umode |= (device == ATA_MASTER ? 0x11 : 0x42);
602 		pci_write_config(parent, scp->channel ? 0x7b : 0x73, umode, 1);
603 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
604 		return;
605 	    }
606 	}
607 	/* make sure eventual UDMA mode from the BIOS is disabled */
608 	pci_write_config(parent, scp->channel ? 0x7b : 0x73,
609 			 pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1)&
610 			 ~(device == ATA_MASTER ? 0x35 : 0xca), 1);
611 	/* FALLTHROUGH */
612 
613     case 0x06461095:	/* CMD 646 ATA controller */
614 	if (wdmamode >= 2 && apiomode >= 4) {
615 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
616 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
617 	    if (bootverbose)
618 		ata_printf(scp, device, "%s setting WDMA2 on CMD chip\n",
619 			   error ? "failed" : "success");
620 	    if (!error) {
621 		int32_t offset = (devno < 3) ? (devno << 1) : 7;
622 
623 		pci_write_config(parent, 0x54 + offset, 0x3f, 1);
624 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
625 		return;
626 	    }
627 	}
628 	/* we could set PIO mode timings, but we assume the BIOS did that */
629 	break;
630 
631     case 0xc6931080:	/* Cypress 82c693 ATA controller */
632 	if (wdmamode >= 2 && apiomode >= 4) {
633 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
634 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
635 	    if (bootverbose)
636 		ata_printf(scp, device,
637 			   "%s setting WDMA2 on Cypress chip\n",
638 			   error ? "failed" : "success");
639 	    if (!error) {
640 		pci_write_config(scp->dev, scp->channel ? 0x4e:0x4c, 0x2020, 2);
641 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
642 		return;
643 	    }
644 	}
645 	/* we could set PIO mode timings, but we assume the BIOS did that */
646 	break;
647 
648     case 0x01021078:	/* Cyrix 5530 ATA33 controller */
649 	scp->alignment = 0xf;	/* DMA engine requires 16 byte alignment */
650 	if (udmamode >= 2) {
651 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
652 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
653 	    if (bootverbose)
654 		ata_printf(scp, device, "%s setting UDMA2 on Cyrix chip\n",
655 			   (error) ? "failed" : "success");
656 	    if (!error) {
657 		cyrix_timing(scp, devno, ATA_UDMA2);
658 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
659 		return;
660 	    }
661 	}
662 	if (wdmamode >= 2 && apiomode >= 4) {
663 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
664 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
665 	    if (bootverbose)
666 		ata_printf(scp, device, "%s setting WDMA2 on Cyrix chip\n",
667 			   (error) ? "failed" : "success");
668 	    if (!error) {
669 		cyrix_timing(scp, devno, ATA_WDMA2);
670 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
671 		return;
672 	    }
673 	}
674 	error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
675 			    ATA_PIO0 + apiomode, ATA_C_F_SETXFER,
676 			    ATA_WAIT_READY);
677 	if (bootverbose)
678 	    ata_printf(scp, device, "%s setting %s on Cyrix chip\n",
679 		       (error) ? "failed" : "success",
680 		       ata_mode2str(ATA_PIO0 + apiomode));
681 	cyrix_timing(scp, devno, ATA_PIO0 + apiomode);
682 	scp->mode[ATA_DEV(device)] = ATA_PIO0 + apiomode;
683 	return;
684 
685     case 0x02111166:	/* ServerWorks ROSB4 ATA33 controller */
686 	if (udmamode >= 2) {
687 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
688 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
689 	    if (bootverbose)
690 		ata_printf(scp, device,
691 			   "%s setting UDMA2 on ServerWorks chip\n",
692 			   (error) ? "failed" : "success");
693 	    if (!error) {
694 		u_int16_t reg56;
695 
696 		pci_write_config(parent, 0x54,
697 				 pci_read_config(parent, 0x54, 1) |
698 				 (0x01 << devno), 1);
699 		reg56 = pci_read_config(parent, 0x56, 2);
700 		reg56 &= ~(0xf << (devno * 4));
701 		reg56 |= (0x2 << (devno * 4));
702 		pci_write_config(parent, 0x56, reg56, 2);
703 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
704 		return;
705 	    }
706 	}
707 	if (wdmamode >= 2 && apiomode >= 4) {
708 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
709 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
710 	    if (bootverbose)
711 		ata_printf(scp, device,
712 			   "%s setting WDMA2 on ServerWorks chip\n",
713 			   (error) ? "failed" : "success");
714 	    if (!error) {
715 		int offset = (scp->channel * 2) + (device == ATA_MASTER);
716 		int word44 = pci_read_config(parent, 0x44, 4);
717 
718 		pci_write_config(parent, 0x54,
719 				 pci_read_config(parent, 0x54, 1) &
720 				 ~(0x01 << devno), 1);
721 		word44 &= ~(0xff << (offset << 8));
722 		word44 |= (0x20 << (offset << 8));
723 		pci_write_config(parent, 0x44, 0x20, 4);
724 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
725 		return;
726 	    }
727 	}
728 	/* we could set PIO mode timings, but we assume the BIOS did that */
729 	break;
730 
731     case 0x4d68105a:	/* Promise TX2 ATA100 controllers */
732     case 0x6268105a:	/* Promise TX2v2 ATA100 controllers */
733     case 0x4d69105a:	/* Promise ATA133 controllers */
734 	ATA_OUTB(scp->r_bmio, ATA_BMDEVSPEC_0, 0x0b);
735 	if (udmamode >= 4 && !(ATA_INB(scp->r_bmio, ATA_BMDEVSPEC_1) & 0x04)) {
736 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
737 				ATA_UDMA + udmamode, ATA_C_F_SETXFER,
738 				ATA_WAIT_READY);
739 	    if (bootverbose)
740 		ata_printf(scp, device, "%s setting %s on Promise chip\n",
741 			   (error) ? "failed" : "success",
742 			   ata_mode2str(ATA_UDMA + udmamode));
743 	    if (!error) {
744 		scp->mode[ATA_DEV(device)] = ATA_UDMA + udmamode;
745 		return;
746 	    }
747 	}
748 	if (udmamode >= 2) {
749 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
750 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
751 	    if (bootverbose)
752 		ata_printf(scp, device, "%s setting %s on Promise chip\n",
753 			   (error) ? "failed" : "success", "UDMA2");
754 	    if (!error) {
755 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
756 		return;
757 	    }
758 	}
759 	if (wdmamode >= 2 && apiomode >= 4) {
760 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
761 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
762 	    if (bootverbose)
763 		ata_printf(scp, device, "%s setting %s on Promise chip\n",
764 			   (error) ? "failed" : "success", "WDMA2");
765 	    if (!error) {
766 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
767 		return;
768 	    }
769 	}
770 	break;
771 
772     case 0x4d30105a:	/* Promise Ultra/FastTrak 100 controllers */
773     case 0x0d30105a:	/* Promise OEM ATA100 controllers */
774 	if (!ATAPI_DEVICE(scp, device) && udmamode >= 5 &&
775 	    !(pci_read_config(parent, 0x50, 2)&(scp->channel ? 1<<11 : 1<<10))){
776 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
777 				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
778 	    if (bootverbose)
779 		ata_printf(scp, device,
780 			   "%s setting UDMA5 on Promise chip\n",
781 			   (error) ? "failed" : "success");
782 	    if (!error) {
783 		promise_timing(scp, devno, ATA_UDMA5);
784 		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
785 		return;
786 	    }
787 	}
788 	/* FALLTHROUGH */
789 
790     case 0x4d38105a:	/* Promise Ultra/FastTrak 66 controllers */
791 	if (!ATAPI_DEVICE(scp, device) && udmamode >= 4 &&
792 	    !(pci_read_config(parent, 0x50, 2)&(scp->channel ? 1<<11 : 1<<10))){
793 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
794 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
795 	    if (bootverbose)
796 		ata_printf(scp, device,
797 			   "%s setting UDMA4 on Promise chip\n",
798 			   (error) ? "failed" : "success");
799 	    if (!error) {
800 		promise_timing(scp, devno, ATA_UDMA4);
801 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
802 		return;
803 	    }
804 	}
805 	/* FALLTHROUGH */
806 
807     case 0x4d33105a:	/* Promise Ultra/FastTrak 33 controllers */
808 	if (!ATAPI_DEVICE(scp, device) && udmamode >= 2) {
809 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
810 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
811 	    if (bootverbose)
812 		ata_printf(scp, device,
813 			   "%s setting UDMA2 on Promise chip\n",
814 			   (error) ? "failed" : "success");
815 	    if (!error) {
816 		promise_timing(scp, devno, ATA_UDMA2);
817 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
818 		return;
819 	    }
820 	}
821 	if (!ATAPI_DEVICE(scp, device) && wdmamode >= 2 && apiomode >= 4) {
822 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
823 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
824 	    if (bootverbose)
825 		ata_printf(scp, device,
826 			   "%s setting WDMA2 on Promise chip\n",
827 			   (error) ? "failed" : "success");
828 	    if (!error) {
829 		promise_timing(scp, devno, ATA_WDMA2);
830 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
831 		return;
832 	    }
833 	}
834 	error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
835 			    ATA_PIO0 + apiomode,
836 			    ATA_C_F_SETXFER, ATA_WAIT_READY);
837 	if (bootverbose)
838 	    ata_printf(scp, device,
839 		       "%s setting PIO%d on Promise chip\n",
840 		       (error) ? "failed" : "success",
841 		       (apiomode >= 0) ? apiomode : 0);
842 	promise_timing(scp, devno, ATA_PIO0 + apiomode);
843 	scp->mode[ATA_DEV(device)] = ATA_PIO0 + apiomode;
844 	return;
845 
846     case 0x00041103:	/* HighPoint HPT366/368/370/372 controllers */
847 	if (!ATAPI_DEVICE(scp, device) &&
848 	    udmamode >= 6 && pci_get_revid(parent) >= 0x05 &&
849 	    !(pci_read_config(parent, 0x5a, 1) & (scp->channel ? 0x01:0x02))) {
850 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
851 				ATA_UDMA6, ATA_C_F_SETXFER, ATA_WAIT_READY);
852 	    if (bootverbose)
853 		ata_printf(scp, device,
854 			   "%s setting UDMA6 on HighPoint chip\n",
855 			   (error) ? "failed" : "success");
856 	    if (!error) {
857 		hpt_timing(scp, devno, ATA_UDMA6);
858 		scp->mode[ATA_DEV(device)] = ATA_UDMA6;
859 		return;
860 	    }
861 	}
862 	if (!ATAPI_DEVICE(scp, device) &&
863 	    udmamode >=5 && pci_get_revid(parent) >= 0x03 &&
864 	    !(pci_read_config(parent, 0x5a, 1) & (scp->channel ? 0x01:0x02))) {
865 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
866 				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
867 	    if (bootverbose)
868 		ata_printf(scp, device,
869 			   "%s setting UDMA5 on HighPoint chip\n",
870 			   (error) ? "failed" : "success");
871 	    if (!error) {
872 		hpt_timing(scp, devno, ATA_UDMA5);
873 		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
874 		return;
875 	    }
876 	}
877 	if (!ATAPI_DEVICE(scp, device) && udmamode >=4 &&
878 	    !(pci_read_config(parent, 0x5a, 1) & (scp->channel ? 0x01:0x02))) {
879 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
880 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
881 	    if (bootverbose)
882 		ata_printf(scp, device,
883 			   "%s setting UDMA4 on HighPoint chip\n",
884 			   (error) ? "failed" : "success");
885 	    if (!error) {
886 		hpt_timing(scp, devno, ATA_UDMA4);
887 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
888 		return;
889 	    }
890 	}
891 	if (!ATAPI_DEVICE(scp, device) && udmamode >= 2) {
892 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
893 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
894 	    if (bootverbose)
895 		ata_printf(scp, device,
896 			   "%s setting UDMA2 on HighPoint chip\n",
897 			   (error) ? "failed" : "success");
898 	    if (!error) {
899 		hpt_timing(scp, devno, ATA_UDMA2);
900 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
901 		return;
902 	    }
903 	}
904 	if (!ATAPI_DEVICE(scp, device) && wdmamode >= 2 && apiomode >= 4) {
905 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
906 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
907 	    if (bootverbose)
908 		ata_printf(scp, device,
909 			   "%s setting WDMA2 on HighPoint chip\n",
910 			   (error) ? "failed" : "success");
911 	    if (!error) {
912 		hpt_timing(scp, devno, ATA_WDMA2);
913 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
914 		return;
915 	    }
916 	}
917 	error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
918 			    ATA_PIO0 + apiomode,
919 			    ATA_C_F_SETXFER, ATA_WAIT_READY);
920 	if (bootverbose)
921 	    ata_printf(scp, device, "%s setting PIO%d on HighPoint chip\n",
922 		       (error) ? "failed" : "success",
923 		       (apiomode >= 0) ? apiomode : 0);
924 	hpt_timing(scp, devno, ATA_PIO0 + apiomode);
925 	scp->mode[ATA_DEV(device)] = ATA_PIO0 + apiomode;
926 	return;
927 
928     default:		/* unknown controller chip */
929 	/* better not try generic DMA on ATAPI devices it almost never works */
930 	if ((device == ATA_MASTER && scp->devices & ATA_ATAPI_MASTER) ||
931 	    (device == ATA_SLAVE && scp->devices & ATA_ATAPI_SLAVE))
932 	    break;
933 
934 	/* if controller says its setup for DMA take the easy way out */
935 	/* the downside is we dont know what DMA mode we are in */
936 	if ((udmamode >= 0 || wdmamode > 1) &&
937 	    (ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) &
938 	     ((device==ATA_MASTER) ?
939 	      ATA_BMSTAT_DMA_MASTER : ATA_BMSTAT_DMA_SLAVE))) {
940 	    scp->mode[ATA_DEV(device)] = ATA_DMA;
941 	    return;
942 	}
943 
944 	/* well, we have no support for this, but try anyways */
945 	if ((wdmamode >= 2 && apiomode >= 4) && scp->r_bmio) {
946 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
947 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
948 	    if (bootverbose)
949 		ata_printf(scp, device,
950 			   "%s setting WDMA2 on generic chip\n",
951 			   (error) ? "failed" : "success");
952 	    if (!error) {
953 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
954 		return;
955 	    }
956 	}
957     }
958     error = ata_command(scp, device, ATA_C_SETFEATURES, 0, ATA_PIO0 + apiomode,
959 			ATA_C_F_SETXFER,ATA_WAIT_READY);
960     if (bootverbose)
961 	ata_printf(scp, device, "%s setting PIO%d on generic chip\n",
962 		   (error) ? "failed" : "success", apiomode < 0 ? 0 : apiomode);
963     if (!error)
964         scp->mode[ATA_DEV(device)] = ATA_PIO0 + apiomode;
965     else {
966 	if (bootverbose)
967 	    ata_printf(scp, device, "using PIO mode set by BIOS\n");
968         scp->mode[ATA_DEV(device)] = ATA_PIO;
969     }
970 }
971 
972 int
973 ata_dmasetup(struct ata_softc *scp, int device, struct ata_dmaentry *dmatab,
974 	     caddr_t data, int32_t count)
975 {
976     u_int32_t dma_count, dma_base;
977     int i = 0;
978 
979     if (((uintptr_t)data & scp->alignment) || (count & scp->alignment)) {
980 	ata_printf(scp, device, "non aligned DMA transfer attempted\n");
981 	return -1;
982     }
983 
984     if (!count) {
985 	ata_printf(scp, device, "zero length DMA transfer attempted\n");
986 	return -1;
987     }
988 
989     dma_base = vtophys(data);
990     dma_count = min(count, (PAGE_SIZE - ((uintptr_t)data & PAGE_MASK)));
991     data += dma_count;
992     count -= dma_count;
993 
994     while (count) {
995 	dmatab[i].base = dma_base;
996 	dmatab[i].count = (dma_count & 0xffff);
997 	i++;
998 	if (i >= ATA_DMA_ENTRIES) {
999 	    ata_printf(scp, device, "too many segments in DMA table\n");
1000 	    return -1;
1001 	}
1002 	dma_base = vtophys(data);
1003 	dma_count = min(count, PAGE_SIZE);
1004 	data += min(count, PAGE_SIZE);
1005 	count -= min(count, PAGE_SIZE);
1006     }
1007     dmatab[i].base = dma_base;
1008     dmatab[i].count = (dma_count & 0xffff) | ATA_DMA_EOT;
1009     return 0;
1010 }
1011 
1012 void
1013 ata_dmastart(struct ata_softc *scp, int device,
1014 	     struct ata_dmaentry *dmatab, int dir)
1015 {
1016     scp->flags |= ATA_DMA_ACTIVE;
1017     ATA_OUTL(scp->r_bmio, ATA_BMDTP_PORT, vtophys(dmatab));
1018     ATA_OUTB(scp->r_bmio, ATA_BMCMD_PORT, dir ? ATA_BMCMD_WRITE_READ : 0);
1019     ATA_OUTB(scp->r_bmio, ATA_BMSTAT_PORT,
1020          (ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) |
1021 	  (ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR)));
1022     ATA_OUTB(scp->r_bmio, ATA_BMCMD_PORT,
1023 	 ATA_INB(scp->r_bmio, ATA_BMCMD_PORT) | ATA_BMCMD_START_STOP);
1024 }
1025 
1026 int
1027 ata_dmadone(struct ata_softc *scp)
1028 {
1029     int error;
1030 
1031     ATA_OUTB(scp->r_bmio, ATA_BMCMD_PORT,
1032 		ATA_INB(scp->r_bmio, ATA_BMCMD_PORT) & ~ATA_BMCMD_START_STOP);
1033     scp->flags &= ~ATA_DMA_ACTIVE;
1034     error = ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT);
1035     ATA_OUTB(scp->r_bmio, ATA_BMSTAT_PORT,
1036 	     error | ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR);
1037     return error & ATA_BMSTAT_MASK;
1038 }
1039 
1040 int
1041 ata_dmastatus(struct ata_softc *scp)
1042 {
1043     return ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;
1044 }
1045 
1046 static void
1047 cyrix_timing(struct ata_softc *scp, int devno, int mode)
1048 {
1049     u_int32_t reg20 = 0x0000e132;
1050     u_int32_t reg24 = 0x00017771;
1051 
1052     switch (mode) {
1053     case ATA_PIO0:	reg20 = 0x0000e132; break;
1054     case ATA_PIO1:	reg20 = 0x00018121; break;
1055     case ATA_PIO2:	reg20 = 0x00024020; break;
1056     case ATA_PIO3:	reg20 = 0x00032010; break;
1057     case ATA_PIO4:	reg20 = 0x00040010; break;
1058     case ATA_WDMA2:	reg24 = 0x00002020; break;
1059     case ATA_UDMA2:	reg24 = 0x00911030; break;
1060     }
1061     ATA_OUTL(scp->r_bmio, (devno << 3) + 0x20, reg20);
1062     ATA_OUTL(scp->r_bmio, (devno << 3) + 0x24, reg24);
1063 }
1064 
1065 static void
1066 promise_timing(struct ata_softc *scp, int devno, int mode)
1067 {
1068     u_int32_t timing = 0;
1069     struct promise_timing {
1070 	u_int8_t  pa:4;
1071 	u_int8_t  prefetch:1;
1072 	u_int8_t  iordy:1;
1073 	u_int8_t  errdy:1;
1074 	u_int8_t  syncin:1;
1075 	u_int8_t  pb:5;
1076 	u_int8_t  mb:3;
1077 	u_int8_t  mc:4;
1078 	u_int8_t  dmaw:1;
1079 	u_int8_t  dmar:1;
1080 	u_int8_t  iordyp:1;
1081 	u_int8_t  dmarqp:1;
1082 	u_int8_t  reserved:8;
1083     } *t = (struct promise_timing*)&timing;
1084 
1085     t->iordy = 1; t->iordyp = 1;
1086     if (mode >= ATA_DMA) {
1087 	t->prefetch = 1; t->errdy = 1; t->syncin = 1;
1088     }
1089 
1090     switch (scp->chiptype) {
1091     case 0x4d33105a:  /* Promise Ultra/Fasttrak 33 */
1092 	switch (mode) {
1093 	default:
1094 	case ATA_PIO0:  t->pa =  9; t->pb = 19; t->mb = 7; t->mc = 15; break;
1095 	case ATA_PIO1:  t->pa =  5; t->pb = 12; t->mb = 7; t->mc = 15; break;
1096 	case ATA_PIO2:  t->pa =  3; t->pb =  8; t->mb = 7; t->mc = 15; break;
1097 	case ATA_PIO3:  t->pa =  2; t->pb =  6; t->mb = 7; t->mc = 15; break;
1098 	case ATA_PIO4:  t->pa =  1; t->pb =  4; t->mb = 7; t->mc = 15; break;
1099 	case ATA_WDMA2: t->pa =  3; t->pb =  7; t->mb = 3; t->mc =  3; break;
1100 	case ATA_UDMA2: t->pa =  3; t->pb =  7; t->mb = 1; t->mc =  1; break;
1101 	}
1102 	break;
1103 
1104     case 0x4d38105a:  /* Promise Ultra/Fasttrak 66 */
1105     case 0x4d30105a:  /* Promise Ultra/Fasttrak 100 */
1106     case 0x0d30105a:  /* Promise OEM ATA 100 */
1107 	switch (mode) {
1108 	default:
1109 	case ATA_PIO0:  t->pa = 15; t->pb = 31; t->mb = 7; t->mc = 15; break;
1110 	case ATA_PIO1:  t->pa = 10; t->pb = 24; t->mb = 7; t->mc = 15; break;
1111 	case ATA_PIO2:  t->pa =  6; t->pb = 16; t->mb = 7; t->mc = 15; break;
1112 	case ATA_PIO3:  t->pa =  4; t->pb = 12; t->mb = 7; t->mc = 15; break;
1113 	case ATA_PIO4:  t->pa =  2; t->pb =  8; t->mb = 7; t->mc = 15; break;
1114 	case ATA_WDMA2: t->pa =  6; t->pb = 14; t->mb = 6; t->mc =  6; break;
1115 	case ATA_UDMA2: t->pa =  6; t->pb = 14; t->mb = 2; t->mc =  2; break;
1116 	case ATA_UDMA4: t->pa =  3; t->pb =  7; t->mb = 1; t->mc =  1; break;
1117 	case ATA_UDMA5: t->pa =  3; t->pb =  7; t->mb = 1; t->mc =  1; break;
1118 	}
1119 	break;
1120     }
1121     pci_write_config(device_get_parent(scp->dev), 0x60 + (devno<<2), timing, 4);
1122 }
1123 
1124 static void
1125 hpt_timing(struct ata_softc *scp, int devno, int mode)
1126 {
1127     device_t parent = device_get_parent(scp->dev);
1128     u_int32_t timing;
1129     if (pci_get_revid(parent) >= 0x05) {	/* HPT372 */
1130 	switch (mode) {
1131 	case ATA_PIO0:  timing = 0x0d029d5e; break;
1132 	case ATA_PIO1:  timing = 0x0d029d26; break;
1133 	case ATA_PIO2:  timing = 0x0c829ca6; break;
1134 	case ATA_PIO3:  timing = 0x0c829c84; break;
1135 	case ATA_PIO4:  timing = 0x0c829c62; break;
1136 	case ATA_WDMA2: timing = 0x2c829262; break;
1137 	case ATA_UDMA2:	timing = 0x1c91dc62; break;
1138 	case ATA_UDMA4:	timing = 0x1c8ddc62; break;
1139 	case ATA_UDMA5:	timing = 0x1c6ddc62; break;
1140 	case ATA_UDMA6:	timing = 0x1c81dc62; break;
1141 	default:	timing = 0x0d029d5e;
1142 	}
1143 	pci_write_config(parent, 0x40 + (devno << 2) , timing, 4);
1144 	pci_write_config(parent, 0x5b, 0x20, 1);
1145     }
1146     else if (pci_get_revid(parent) >= 0x03) {	/* HPT370 */
1147 	switch (mode) {
1148 	case ATA_PIO0:	timing = 0x06914e57; break;
1149 	case ATA_PIO1:	timing = 0x06914e43; break;
1150 	case ATA_PIO2:	timing = 0x06514e33; break;
1151 	case ATA_PIO3:	timing = 0x06514e22; break;
1152 	case ATA_PIO4:	timing = 0x06514e21; break;
1153 	case ATA_WDMA2:	timing = 0x26514e21; break;
1154 	case ATA_UDMA2:	timing = 0x16494e31; break;
1155 	case ATA_UDMA4:	timing = 0x16454e31; break;
1156 	case ATA_UDMA5:	timing = 0x16454e31; break;
1157 	default:	timing = 0x06514e57;
1158 	}
1159 	pci_write_config(parent, 0x40 + (devno << 2) , timing, 4);
1160 	pci_write_config(parent, 0x5b, 0x22, 1);
1161     }
1162     else {					/* HPT36[68] */
1163 	switch (pci_read_config(parent, 0x41 + (devno << 2), 1)) {
1164 	case 0x85:	/* 25Mhz */
1165 	    switch (mode) {
1166 	    case ATA_PIO0:	timing = 0xc0d08585; break;
1167 	    case ATA_PIO1:	timing = 0xc0d08572; break;
1168 	    case ATA_PIO2:	timing = 0xc0ca8542; break;
1169 	    case ATA_PIO3:	timing = 0xc0ca8532; break;
1170 	    case ATA_PIO4:	timing = 0xc0ca8521; break;
1171 	    case ATA_WDMA2:	timing = 0xa0ca8521; break;
1172 	    case ATA_UDMA2:	timing = 0x90cf8521; break;
1173 	    case ATA_UDMA4:	timing = 0x90c98521; break;
1174 	    default:		timing = 0x01208585;
1175 	    }
1176 	    break;
1177 	default:
1178 	case 0xa7:	/* 33MHz */
1179 	    switch (mode) {
1180 	    case ATA_PIO0:	timing = 0xc0d0a7aa; break;
1181 	    case ATA_PIO1:	timing = 0xc0d0a7a3; break;
1182 	    case ATA_PIO2:	timing = 0xc0d0a753; break;
1183 	    case ATA_PIO3:	timing = 0xc0c8a742; break;
1184 	    case ATA_PIO4:	timing = 0xc0c8a731; break;
1185 	    case ATA_WDMA2:	timing = 0xa0c8a731; break;
1186 	    case ATA_UDMA2:	timing = 0x90caa731; break;
1187 	    case ATA_UDMA4:	timing = 0x90c9a731; break;
1188 	    default:		timing = 0x0120a7a7;
1189 	    }
1190 	    break;
1191 	case 0xd9:	/* 40Mhz */
1192 	    switch (mode) {
1193 	    case ATA_PIO0:	timing = 0xc018d9d9; break;
1194 	    case ATA_PIO1:	timing = 0xc010d9c7; break;
1195 	    case ATA_PIO2:	timing = 0xc010d997; break;
1196 	    case ATA_PIO3:	timing = 0xc010d974; break;
1197 	    case ATA_PIO4:	timing = 0xc008d963; break;
1198 	    case ATA_WDMA2:	timing = 0xa008d943; break;
1199 	    case ATA_UDMA2:	timing = 0x900bd943; break;
1200 	    case ATA_UDMA4:	timing = 0x900fd943; break;
1201 	    default:		timing = 0x0120d9d9;
1202 	    }
1203 	}
1204 	pci_write_config(parent, 0x40 + (devno << 2), (timing & ~0x80000000),4);
1205     }
1206 }
1207