Home | History | Annotate | Line # | Download | only in ic
siisata.c revision 1.30.4.14
      1 /* $NetBSD: siisata.c,v 1.30.4.14 2017/04/24 21:19:21 jakllsch Exp $ */
      2 
      3 /* from ahcisata_core.c */
      4 
      5 /*
      6  * Copyright (c) 2006 Manuel Bouyer.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     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  */
     29 
     30 /* from atapi_wdc.c */
     31 
     32 /*
     33  * Copyright (c) 1998, 2001 Manuel Bouyer.
     34  *
     35  * Redistribution and use in source and binary forms, with or without
     36  * modification, are permitted provided that the following conditions
     37  * are met:
     38  * 1. Redistributions of source code must retain the above copyright
     39  *    notice, this list of conditions and the following disclaimer.
     40  * 2. Redistributions in binary form must reproduce the above copyright
     41  *    notice, this list of conditions and the following disclaimer in the
     42  *    documentation and/or other materials provided with the distribution.
     43  *
     44  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     45  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     46  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     47  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     48  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     49  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     50  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     51  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     52  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     53  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     54  */
     55 
     56 /*
     57  * Copyright (c) 2007, 2008, 2009, 2010 Jonathan A. Kollasch.
     58  * All rights reserved.
     59  *
     60  * Redistribution and use in source and binary forms, with or without
     61  * modification, are permitted provided that the following conditions
     62  * are met:
     63  * 1. Redistributions of source code must retain the above copyright
     64  *    notice, this list of conditions and the following disclaimer.
     65  * 2. Redistributions in binary form must reproduce the above copyright
     66  *    notice, this list of conditions and the following disclaimer in the
     67  *    documentation and/or other materials provided with the distribution.
     68  *
     69  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     70  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     71  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     72  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     73  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     74  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     75  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     76  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     77  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     78  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     79  */
     80 
     81 #include <sys/cdefs.h>
     82 __KERNEL_RCSID(0, "$NetBSD: siisata.c,v 1.30.4.14 2017/04/24 21:19:21 jakllsch Exp $");
     83 
     84 #include <sys/types.h>
     85 #include <sys/param.h>
     86 #include <sys/kernel.h>
     87 #include <sys/malloc.h>
     88 #include <sys/systm.h>
     89 #include <sys/syslog.h>
     90 #include <sys/disklabel.h>
     91 #include <sys/buf.h>
     92 #include <sys/proc.h>
     93 
     94 #include <dev/ata/atareg.h>
     95 #include <dev/ata/satavar.h>
     96 #include <dev/ata/satareg.h>
     97 #include <dev/ata/satafisvar.h>
     98 #include <dev/ata/satafisreg.h>
     99 #include <dev/ata/satapmpreg.h>
    100 #include <dev/ic/siisatavar.h>
    101 #include <dev/ic/siisatareg.h>
    102 
    103 #include <dev/scsipi/scsi_all.h> /* for SCSI status */
    104 
    105 #include "atapibus.h"
    106 
    107 #ifdef SIISATA_DEBUG
    108 int siisata_debug_mask = 0;
    109 #endif
    110 
    111 #define ATA_DELAY 10000		/* 10s for a drive I/O */
    112 
    113 #ifndef __BUS_SPACE_HAS_STREAM_METHODS
    114 #if _BYTE_ORDER == _LITTLE_ENDIAN
    115 #define bus_space_read_stream_4 bus_space_read_4
    116 #define bus_space_read_region_stream_4 bus_space_read_region_4
    117 #else
    118 static inline uint32_t
    119 bus_space_read_stream_4(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o)
    120 {
    121 	return htole32(bus_space_read_4(t, h, o));
    122 }
    123 
    124 static inline void
    125 bus_space_read_region_stream_4(bus_space_tag_t t, bus_space_handle_t h,
    126     bus_size_t o, uint32_t *p, bus_size_t c)
    127 {
    128 	bus_space_read_region_4(t, h, o, p, c);
    129 	for (bus_size_t i = 0; i < c; i++) {
    130 		p[i] = htole32(p[i]);
    131 	}
    132 }
    133 #endif
    134 #endif
    135 
    136 static void siisata_attach_port(struct siisata_softc *, int);
    137 static void siisata_intr_port(struct siisata_channel *);
    138 
    139 void siisata_probe_drive(struct ata_channel *);
    140 void siisata_setup_channel(struct ata_channel *);
    141 
    142 int siisata_ata_bio(struct ata_drive_datas *, struct ata_xfer *);
    143 void siisata_reset_drive(struct ata_drive_datas *, int, uint32_t *);
    144 void siisata_reset_channel(struct ata_channel *, int);
    145 int siisata_ata_addref(struct ata_drive_datas *);
    146 void siisata_ata_delref(struct ata_drive_datas *);
    147 void siisata_killpending(struct ata_drive_datas *);
    148 
    149 void siisata_cmd_start(struct ata_channel *, struct ata_xfer *);
    150 int siisata_cmd_complete(struct ata_channel *, struct ata_xfer *, int);
    151 void siisata_cmd_done(struct ata_channel *, struct ata_xfer *, int);
    152 void siisata_cmd_kill_xfer(struct ata_channel *, struct ata_xfer *, int);
    153 
    154 void siisata_bio_start(struct ata_channel *, struct ata_xfer *);
    155 int siisata_bio_complete(struct ata_channel *, struct ata_xfer *, int);
    156 void siisata_bio_kill_xfer(struct ata_channel *, struct ata_xfer *, int);
    157 int siisata_exec_command(struct ata_drive_datas *, struct ata_xfer *);
    158 
    159 void siisata_timeout(void *);
    160 
    161 static void siisata_reinit_port(struct ata_channel *);
    162 static void siisata_device_reset(struct ata_channel *);
    163 static void siisata_activate_prb(struct siisata_channel *, int);
    164 static void siisata_deactivate_prb(struct siisata_channel *, int);
    165 static int siisata_dma_setup(struct ata_channel *chp, int, void *,
    166     size_t, int);
    167 
    168 #if NATAPIBUS > 0
    169 void siisata_atapibus_attach(struct atabus_softc *);
    170 void siisata_atapi_probe_device(struct atapibus_softc *, int);
    171 void siisata_atapi_minphys(struct buf *);
    172 void siisata_atapi_start(struct ata_channel *,struct ata_xfer *);
    173 int siisata_atapi_complete(struct ata_channel *, struct ata_xfer *, int);
    174 void siisata_atapi_kill_xfer(struct ata_channel *, struct ata_xfer *, int);
    175 void siisata_atapi_scsipi_request(struct scsipi_channel *,
    176     scsipi_adapter_req_t, void *);
    177 void siisata_atapi_kill_pending(struct scsipi_periph *);
    178 #endif /* NATAPIBUS */
    179 
    180 const struct ata_bustype siisata_ata_bustype = {
    181 	SCSIPI_BUSTYPE_ATA,
    182 	siisata_ata_bio,
    183 	siisata_reset_drive,
    184 	siisata_reset_channel,
    185 	siisata_exec_command,
    186 	ata_get_params,
    187 	siisata_ata_addref,
    188 	siisata_ata_delref,
    189 	siisata_killpending
    190 };
    191 
    192 #if NATAPIBUS > 0
    193 static const struct scsipi_bustype siisata_atapi_bustype = {
    194 	SCSIPI_BUSTYPE_ATAPI,
    195 	atapi_scsipi_cmd,
    196 	atapi_interpret_sense,
    197 	atapi_print_addr,
    198 	siisata_atapi_kill_pending,
    199 	NULL,
    200 };
    201 #endif /* NATAPIBUS */
    202 
    203 
    204 void
    205 siisata_attach(struct siisata_softc *sc)
    206 {
    207 	int i;
    208 
    209 	SIISATA_DEBUG_PRINT(("%s: %s: GR_GC: 0x%08x\n",
    210 	    SIISATANAME(sc), __func__, GRREAD(sc, GR_GC)), DEBUG_FUNCS);
    211 
    212 	sc->sc_atac.atac_cap = ATAC_CAP_DMA | ATAC_CAP_UDMA;
    213 	sc->sc_atac.atac_pio_cap = 4;
    214 	sc->sc_atac.atac_dma_cap = 2;
    215 	sc->sc_atac.atac_udma_cap = 6;
    216 	sc->sc_atac.atac_channels = sc->sc_chanarray;
    217 	sc->sc_atac.atac_probe = siisata_probe_drive;
    218 	sc->sc_atac.atac_bustype_ata = &siisata_ata_bustype;
    219 	sc->sc_atac.atac_set_modes = siisata_setup_channel;
    220 #if NATAPIBUS > 0
    221 	sc->sc_atac.atac_atapibus_attach = siisata_atapibus_attach;
    222 #endif
    223 
    224 	/* come out of reset state */
    225 	GRWRITE(sc, GR_GC, 0);
    226 
    227 	for (i = 0; i < sc->sc_atac.atac_nchannels; i++) {
    228 		siisata_attach_port(sc, i);
    229 	}
    230 
    231 	SIISATA_DEBUG_PRINT(("%s: %s: GR_GC: 0x%08x\n", SIISATANAME(sc),
    232 	    __func__, GRREAD(sc, GR_GC)), DEBUG_FUNCS);
    233 	return;
    234 }
    235 
    236 static void
    237 siisata_disable_port_interrupt(struct ata_channel *chp)
    238 {
    239 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
    240 
    241 	PRWRITE(sc, PRX(chp->ch_channel, PRO_PIEC), 0xffffffff);
    242 }
    243 
    244 static void
    245 siisata_enable_port_interrupt(struct ata_channel *chp)
    246 {
    247 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
    248 
    249 	/* clear any interrupts */
    250 	(void)PRREAD(sc, PRX(chp->ch_channel, PRO_PSS));
    251 	PRWRITE(sc, PRX(chp->ch_channel, PRO_PIS), 0xffffffff);
    252 	/* and enable CmdErrr+CmdCmpl interrupting */
    253 	PRWRITE(sc, PRX(chp->ch_channel, PRO_PIES),
    254 	    PR_PIS_CMDERRR | PR_PIS_CMDCMPL);
    255 }
    256 
    257 static void
    258 siisata_init_port(struct siisata_softc *sc, int port)
    259 {
    260 	struct siisata_channel *schp;
    261 	struct ata_channel *chp;
    262 
    263 	schp = &sc->sc_channels[port];
    264 	chp = (struct ata_channel *)schp;
    265 
    266 	/* come out of reset, 64-bit activation */
    267 	PRWRITE(sc, PRX(chp->ch_channel, PRO_PCC),
    268 	    PR_PC_32BA | PR_PC_PORT_RESET);
    269 	/* initialize port */
    270 	siisata_reinit_port(chp);
    271 	/* enable CmdErrr+CmdCmpl interrupting */
    272 	siisata_enable_port_interrupt(chp);
    273 	/* enable port interrupt */
    274 	GRWRITE(sc, GR_GC, GRREAD(sc, GR_GC) | GR_GC_PXIE(chp->ch_channel));
    275 }
    276 
    277 static void
    278 siisata_attach_port(struct siisata_softc *sc, int port)
    279 {
    280 	int j;
    281 	int dmasize;
    282 	int error;
    283 	void *prbp;
    284 	struct siisata_channel *schp;
    285 	struct ata_channel *chp;
    286 
    287 	schp = &sc->sc_channels[port];
    288 	chp = (struct ata_channel *)schp;
    289 	sc->sc_chanarray[port] = chp;
    290 	chp->ch_channel = port;
    291 	chp->ch_atac = &sc->sc_atac;
    292 	chp->ch_queue = ata_queue_alloc(SIISATA_MAX_SLOTS);
    293 	if (chp->ch_queue == NULL) {
    294 		aprint_error_dev(sc->sc_atac.atac_dev,
    295 		    "port %d: can't allocate memory "
    296 		    "for command queue\n", chp->ch_channel);
    297 		return;
    298 	}
    299 
    300 	dmasize = SIISATA_CMD_SIZE * SIISATA_MAX_SLOTS;
    301 
    302 	SIISATA_DEBUG_PRINT(("%s: %s: dmasize: %d\n", SIISATANAME(sc),
    303 	    __func__, dmasize), DEBUG_FUNCS);
    304 
    305 	error = bus_dmamem_alloc(sc->sc_dmat, dmasize, PAGE_SIZE, 0,
    306 	    &schp->sch_prb_seg, 1, &schp->sch_prb_nseg, BUS_DMA_NOWAIT);
    307 	if (error) {
    308 		aprint_error_dev(sc->sc_atac.atac_dev,
    309 		    "unable to allocate PRB table memory, "
    310 		    "error=%d\n", error);
    311 		return;
    312 	}
    313 
    314 	error = bus_dmamem_map(sc->sc_dmat,
    315 	    &schp->sch_prb_seg, schp->sch_prb_nseg,
    316 	    dmasize, &prbp, BUS_DMA_NOWAIT | BUS_DMA_COHERENT);
    317 	if (error) {
    318 		aprint_error_dev(sc->sc_atac.atac_dev,
    319 		    "unable to map PRB table memory, "
    320 		    "error=%d\n", error);
    321 		bus_dmamem_free(sc->sc_dmat,
    322 		    &schp->sch_prb_seg, schp->sch_prb_nseg);
    323 		return;
    324 	}
    325 
    326 	error = bus_dmamap_create(sc->sc_dmat, dmasize, 1, dmasize, 0,
    327 	    BUS_DMA_NOWAIT, &schp->sch_prbd);
    328 	if (error) {
    329 		aprint_error_dev(sc->sc_atac.atac_dev,
    330 		    "unable to create PRB table map, "
    331 		    "error=%d\n", error);
    332 		bus_dmamem_unmap(sc->sc_dmat, prbp, dmasize);
    333 		bus_dmamem_free(sc->sc_dmat,
    334 		    &schp->sch_prb_seg, schp->sch_prb_nseg);
    335 		return;
    336 	}
    337 
    338 	error = bus_dmamap_load(sc->sc_dmat, schp->sch_prbd,
    339 	    prbp, dmasize, NULL, BUS_DMA_NOWAIT);
    340 	if (error) {
    341 		aprint_error_dev(sc->sc_atac.atac_dev,
    342 		    "unable to load PRB table map, "
    343 		    "error=%d\n", error);
    344 		bus_dmamap_destroy(sc->sc_dmat, schp->sch_prbd);
    345 		bus_dmamem_unmap(sc->sc_dmat, prbp, dmasize);
    346 		bus_dmamem_free(sc->sc_dmat,
    347 		    &schp->sch_prb_seg, schp->sch_prb_nseg);
    348 		return;
    349 	}
    350 
    351 	for (j = 0; j < SIISATA_MAX_SLOTS; j++) {
    352 		schp->sch_prb[j] = (struct siisata_prb *)
    353 		    ((char *)prbp + SIISATA_CMD_SIZE * j);
    354 		schp->sch_bus_prb[j] =
    355 		    schp->sch_prbd->dm_segs[0].ds_addr +
    356 		    SIISATA_CMD_SIZE * j;
    357 		error = bus_dmamap_create(sc->sc_dmat, MAXPHYS,
    358 		    SIISATA_NSGE, MAXPHYS, 0,
    359 		    BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
    360 		    &schp->sch_datad[j]);
    361 		if (error) {
    362 			aprint_error_dev(sc->sc_atac.atac_dev,
    363 			    "couldn't create xfer DMA map, error=%d\n",
    364 			    error);
    365 			return;
    366 		}
    367 	}
    368 
    369 	if (bus_space_subregion(sc->sc_prt, sc->sc_prh,
    370 	    PRX(chp->ch_channel, PRO_SSTATUS), 4, &schp->sch_sstatus) != 0) {
    371 		aprint_error_dev(sc->sc_atac.atac_dev,
    372 		    "couldn't map port %d SStatus regs\n",
    373 		    chp->ch_channel);
    374 		return;
    375 	}
    376 	if (bus_space_subregion(sc->sc_prt, sc->sc_prh,
    377 	    PRX(chp->ch_channel, PRO_SCONTROL), 4, &schp->sch_scontrol) != 0) {
    378 		aprint_error_dev(sc->sc_atac.atac_dev,
    379 		    "couldn't map port %d SControl regs\n",
    380 		    chp->ch_channel);
    381 		return;
    382 	}
    383 	if (bus_space_subregion(sc->sc_prt, sc->sc_prh,
    384 	    PRX(chp->ch_channel, PRO_SERROR), 4, &schp->sch_serror) != 0) {
    385 		aprint_error_dev(sc->sc_atac.atac_dev,
    386 		    "couldn't map port %d SError regs\n",
    387 		    chp->ch_channel);
    388 		return;
    389 	}
    390 
    391 	siisata_init_port(sc, port);
    392 
    393 	ata_channel_attach(chp);
    394 
    395 	return;
    396 }
    397 
    398 int
    399 siisata_detach(struct siisata_softc *sc, int flags)
    400 {
    401 	struct atac_softc *atac = &sc->sc_atac;
    402 	struct scsipi_adapter *adapt = &atac->atac_atapi_adapter._generic;
    403 	struct siisata_channel *schp;
    404 	struct ata_channel *chp;
    405 	int i, j, error;
    406 
    407 	for (i = 0; i < sc->sc_atac.atac_nchannels; i++) {
    408 		schp = &sc->sc_channels[i];
    409 		chp = sc->sc_chanarray[i];
    410 
    411 		if (chp->atabus == NULL)
    412 			continue;
    413 		if ((error = config_detach(chp->atabus, flags)) != 0)
    414 			return error;
    415 
    416 		for (j = 0; j < SIISATA_MAX_SLOTS; j++)
    417 			bus_dmamap_destroy(sc->sc_dmat, schp->sch_datad[j]);
    418 
    419 		bus_dmamap_unload(sc->sc_dmat, schp->sch_prbd);
    420 		bus_dmamap_destroy(sc->sc_dmat, schp->sch_prbd);
    421 		bus_dmamem_unmap(sc->sc_dmat, schp->sch_prb[0],
    422 		    SIISATA_CMD_SIZE * SIISATA_MAX_SLOTS);
    423 		bus_dmamem_free(sc->sc_dmat,
    424 		    &schp->sch_prb_seg, schp->sch_prb_nseg);
    425 
    426 		free(chp->ch_queue, M_DEVBUF);
    427 		chp->atabus = NULL;
    428 	}
    429 
    430 	if (adapt->adapt_refcnt != 0)
    431 		return EBUSY;
    432 
    433 	/* leave the chip in reset */
    434 	GRWRITE(sc, GR_GC, GR_GC_GLBLRST);
    435 
    436 	return 0;
    437 }
    438 
    439 void
    440 siisata_resume(struct siisata_softc *sc)
    441 {
    442 	int i;
    443 
    444 	/* come out of reset state */
    445 	GRWRITE(sc, GR_GC, 0);
    446 
    447 	for (i = 0; i < sc->sc_atac.atac_nchannels; i++) {
    448 		siisata_init_port(sc, i);
    449 	}
    450 
    451 }
    452 
    453 int
    454 siisata_intr(void *v)
    455 {
    456 	struct siisata_softc *sc = v;
    457 	uint32_t is;
    458 	int i, r = 0;
    459 	while ((is = GRREAD(sc, GR_GIS))) {
    460 		SIISATA_DEBUG_PRINT(("%s: %s: GR_GIS: 0x%08x\n",
    461 		    SIISATANAME(sc), __func__, is), DEBUG_INTR);
    462 		r = 1;
    463 		for (i = 0; i < sc->sc_atac.atac_nchannels; i++)
    464 			if (is & GR_GIS_PXIS(i))
    465 				siisata_intr_port(&sc->sc_channels[i]);
    466 	}
    467 	return r;
    468 }
    469 
    470 static void
    471 siisata_intr_port(struct siisata_channel *schp)
    472 {
    473 	struct siisata_softc *sc;
    474 	struct ata_channel *chp;
    475 	struct ata_xfer *xfer;
    476 	int slot;
    477 	uint32_t pss, pis;
    478 	uint32_t prbfis;
    479 
    480 	sc = (struct siisata_softc *)schp->ata_channel.ch_atac;
    481 	chp = &schp->ata_channel;
    482 	xfer = ata_queue_hwslot_to_xfer(chp->ch_queue, 0); /* XXX slot */
    483 	slot = SIISATA_NON_NCQ_SLOT;
    484 
    485 	pis = PRREAD(sc, PRX(chp->ch_channel, PRO_PIS));
    486 
    487 	SIISATA_DEBUG_PRINT(("%s: %s port %d, pis 0x%x ", SIISATANAME(sc),
    488 	    __func__, chp->ch_channel, pis), DEBUG_INTR);
    489 
    490 	if (pis & PR_PIS_CMDCMPL) {
    491 		/* get slot status, clearing completion interrupt */
    492 		pss = PRREAD(sc, PRX(chp->ch_channel, PRO_PSS));
    493 		SIISATA_DEBUG_PRINT(("pss 0x%x\n", pss), DEBUG_INTR);
    494 		/* is this expected? */
    495 		/* XXX improve */
    496 		if ((schp->sch_active_slots & __BIT(slot)) == 0) {
    497 			aprint_error( "%s: unexpected command "
    498 			    "completion on port %d\n",
    499 			    SIISATANAME(sc), chp->ch_channel);
    500 			return;
    501 		}
    502 		if ((~pss & __BIT(slot)) == 0) {
    503 			aprint_error( "%s: unknown slot "
    504 			    "completion on port %d, pss 0x%x\n",
    505 			    SIISATANAME(sc), chp->ch_channel, pss);
    506 			return;
    507 		}
    508 	} else if (pis & PR_PIS_CMDERRR) {
    509 		uint32_t ec;
    510 
    511 		/* emulate a CRC error by default */
    512 		chp->ch_status = WDCS_ERR;
    513 		chp->ch_error = WDCE_CRC;
    514 
    515 		ec = PRREAD(sc, PRX(chp->ch_channel, PRO_PCE));
    516 		SIISATA_DEBUG_PRINT(("ec %d\n", ec), DEBUG_INTR);
    517 		if (ec <= PR_PCE_DATAFISERROR) {
    518 			if (ec == PR_PCE_DEVICEERROR && xfer != NULL) {
    519 				/* read in specific information about error */
    520 				prbfis = bus_space_read_stream_4(
    521 				    sc->sc_prt, sc->sc_prh,
    522 				    PRSX(chp->ch_channel, slot, PRSO_FIS));
    523 				/* set ch_status and ch_error */
    524 				satafis_rdh_parse(chp, (uint8_t *)&prbfis);
    525 			}
    526 			siisata_reinit_port(chp);
    527 		} else {
    528 			aprint_error_dev(sc->sc_atac.atac_dev, "fatal error %d"
    529 			    " on channel %d (ctx 0x%x), resetting\n",
    530 			    ec, chp->ch_channel,
    531 			    PRREAD(sc, PRX(chp->ch_channel, PRO_PCR)));
    532 			/* okay, we have a "Fatal Error" */
    533 			siisata_device_reset(chp);
    534 		}
    535 	}
    536 
    537 	/* clear some (ok, all) ints */
    538 	PRWRITE(sc, PRX(chp->ch_channel, PRO_PIS), 0xffffffff);
    539 	if (xfer && xfer->c_intr)
    540 		xfer->c_intr(chp, xfer, 0);
    541 
    542 	return;
    543 }
    544 
    545 void
    546 siisata_reset_drive(struct ata_drive_datas *drvp, int flags, uint32_t *sigp)
    547 {
    548 	struct ata_channel *chp = drvp->chnl_softc;
    549 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
    550 	struct siisata_channel *schp = (struct siisata_channel *)chp;
    551 	struct siisata_prb *prb;
    552 	int slot = SIISATA_NON_NCQ_SLOT;
    553 	int i;
    554 
    555 	/* wait for ready */
    556 	while (!(PRREAD(sc, PRX(chp->ch_channel, PRO_PS)) & PR_PS_PORT_READY))
    557 		DELAY(10);
    558 
    559 	prb = schp->sch_prb[slot];
    560 	memset(prb, 0, SIISATA_CMD_SIZE);
    561 	prb->prb_control =
    562 	    htole16(PRB_CF_SOFT_RESET | PRB_CF_INTERRUPT_MASK);
    563 	KASSERT(drvp->drive <= PMP_PORT_CTL);
    564 	prb->prb_fis[rhd_c] = drvp->drive;
    565 
    566 	siisata_activate_prb(schp, slot);
    567 
    568 	for(i = 0; i < 3100; i++) {
    569 		if ((PRREAD(sc, PRX(chp->ch_channel, PRO_PSS)) &
    570 		    PR_PXSS(slot)) == 0)
    571 			break;
    572 		if (flags & AT_WAIT)
    573 			tsleep(schp, PRIBIO, "siiprb", mstohz(10));
    574 		else
    575 			DELAY(10000);
    576 	}
    577 
    578 	siisata_deactivate_prb(schp, slot);
    579 	if (i == 3100) {
    580 		/* timeout */
    581 		siisata_device_reset(chp);
    582 		if (sigp)
    583 			*sigp = 0xffffffff;
    584 	} else {
    585 		/* read the signature out of the FIS */
    586 		if (sigp) {
    587 			*sigp = 0;
    588 			*sigp |= (PRREAD(sc, PRSX(chp->ch_channel, slot,
    589 			    PRSO_FIS+0x4)) & 0x00ffffff) << 8;
    590 			*sigp |= PRREAD(sc, PRSX(chp->ch_channel, slot,
    591 			    PRSO_FIS+0xc)) & 0xff;
    592 		}
    593 	}
    594 
    595 #if 1
    596 	/* attempt to downgrade signaling in event of CRC error */
    597 	/* XXX should be part of the MI (S)ATA subsystem */
    598 	if (chp->ch_status == 0x51 && chp->ch_error == 0x84) {
    599 		bus_space_write_4(sc->sc_prt, schp->sch_scontrol, 0,
    600 		    SControl_IPM_NONE | SControl_SPD_G1 | SControl_DET_INIT);
    601 		DELAY(10);
    602 		bus_space_write_4(sc->sc_prt, schp->sch_scontrol, 0,
    603 		    SControl_IPM_NONE | SControl_SPD_G1);
    604 		DELAY(10);
    605 		for (;;) {
    606 			if ((bus_space_read_4(sc->sc_prt, schp->sch_sstatus, 0)
    607 			    & SStatus_DET_mask) == SStatus_DET_DEV)
    608 				break;
    609 			DELAY(10);
    610 		}
    611 	}
    612 #endif
    613 
    614 #if 1
    615 	chp->ch_status = 0;
    616 	chp->ch_error = 0;
    617 #endif
    618 	return;
    619 }
    620 
    621 void
    622 siisata_reset_channel(struct ata_channel *chp, int flags)
    623 {
    624 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
    625 	struct siisata_channel *schp = (struct siisata_channel *)chp;
    626 
    627 	SIISATA_DEBUG_PRINT(("%s: %s\n", SIISATANAME(sc), __func__),
    628 	    DEBUG_FUNCS);
    629 
    630 	if (sata_reset_interface(chp, sc->sc_prt, schp->sch_scontrol,
    631 	    schp->sch_sstatus, flags) != SStatus_DET_DEV) {
    632 		aprint_error("%s port %d: reset failed\n",
    633 		    SIISATANAME(sc), chp->ch_channel);
    634 		/* XXX and then ? */
    635 	}
    636 	/* wait for ready */
    637 	while (!(PRREAD(sc, PRX(chp->ch_channel, PRO_PS)) & PR_PS_PORT_READY))
    638 		DELAY(10);
    639 	PRWRITE(sc, PRX(chp->ch_channel, PRO_SERROR),
    640 	    PRREAD(sc, PRX(chp->ch_channel, PRO_SERROR)));
    641 	ata_kill_active(chp, KILL_RESET);
    642 
    643 	return;
    644 }
    645 
    646 int
    647 siisata_ata_addref(struct ata_drive_datas *drvp)
    648 {
    649 	return 0;
    650 }
    651 
    652 void
    653 siisata_ata_delref(struct ata_drive_datas *drvp)
    654 {
    655 	return;
    656 }
    657 
    658 void
    659 siisata_killpending(struct ata_drive_datas *drvp)
    660 {
    661 	return;
    662 }
    663 
    664 void
    665 siisata_probe_drive(struct ata_channel *chp)
    666 {
    667 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
    668 	struct siisata_channel *schp = (struct siisata_channel *)chp;
    669 	int i;
    670 	uint32_t sig;
    671 	int slot = SIISATA_NON_NCQ_SLOT;
    672 	struct siisata_prb *prb;
    673 	bool timed_out;
    674 
    675 	SIISATA_DEBUG_PRINT(("%s: %s: port %d start\n", SIISATANAME(sc),
    676 	    __func__, chp->ch_channel), DEBUG_FUNCS);
    677 
    678 	/*
    679 	 * disable port interrupt as we're polling for PHY up and
    680 	 * prb completion
    681 	 */
    682 	siisata_disable_port_interrupt(chp);
    683 
    684 	switch(sata_reset_interface(chp, sc->sc_prt, schp->sch_scontrol,
    685 		schp->sch_sstatus, AT_WAIT)) {
    686 	case SStatus_DET_DEV:
    687 		/* clear any interrupts */
    688 		(void)PRREAD(sc, PRX(chp->ch_channel, PRO_PSS));
    689 		PRWRITE(sc, PRX(chp->ch_channel, PRO_PIS), 0xffffffff);
    690 		/* wait for ready */
    691 		while (!(PRREAD(sc, PRX(chp->ch_channel, PRO_PS))
    692 		    & PR_PS_PORT_READY))
    693 			DELAY(10);
    694 		prb = schp->sch_prb[slot];
    695 		memset(prb, 0, SIISATA_CMD_SIZE);
    696 		prb->prb_control = htole16(PRB_CF_SOFT_RESET);
    697 		prb->prb_fis[rhd_c] = PMP_PORT_CTL;
    698 
    699 		siisata_activate_prb(schp, slot);
    700 
    701 		timed_out = 1;
    702 		for(i = 0; i < 3100; i++) {
    703 			if ((PRREAD(sc, PRX(chp->ch_channel, PRO_PSS)) &
    704 			    PR_PXSS(slot)) == 0) {
    705 				/* prb completed */
    706 				timed_out = 0;
    707 				break;
    708 			}
    709 			if (PRREAD(sc, PRX(chp->ch_channel, PRO_PIS)) &
    710 			    (PR_PIS_CMDERRR << 16)) {
    711 				/* we got an error; handle as timeout */
    712 				break;
    713 			}
    714 
    715 			tsleep(schp, PRIBIO, "siiprb", mstohz(10));
    716 		}
    717 
    718 		siisata_deactivate_prb(schp, slot);
    719 		if (timed_out) {
    720 			aprint_error_dev(sc->sc_atac.atac_dev,
    721 			    "SOFT_RESET failed on port %d (error %d PSS 0x%x), "
    722 			    "resetting\n", chp->ch_channel,
    723 			    PRREAD(sc, PRX(chp->ch_channel, PRO_PCE)),
    724 			    PRREAD(sc, PRX(chp->ch_channel, PRO_PSS)));
    725 			siisata_reinit_port(chp);
    726 			break;
    727 		}
    728 
    729 		/* read the signature out of the FIS */
    730 		sig = 0;
    731 		sig |= (PRREAD(sc, PRSX(chp->ch_channel, slot,
    732 		    PRSO_FIS+0x4)) & 0x00ffffff) << 8;
    733 		sig |= PRREAD(sc, PRSX(chp->ch_channel, slot,
    734 		    PRSO_FIS+0xc)) & 0xff;
    735 
    736 		SIISATA_DEBUG_PRINT(("%s: %s: sig=0x%08x\n", SIISATANAME(sc),
    737 		    __func__, sig), DEBUG_PROBE);
    738 
    739 		if (sig == 0x96690101)
    740 			PRWRITE(sc, PRX(chp->ch_channel, PRO_PCS),
    741 			    PR_PC_PMP_ENABLE);
    742 		sata_interpret_sig(chp, 0, sig);
    743 		break;
    744 	default:
    745 		break;
    746 	}
    747 
    748 	siisata_enable_port_interrupt(chp);
    749 	SIISATA_DEBUG_PRINT(("%s: %s: port %d done\n", SIISATANAME(sc),
    750 	    __func__, chp->ch_channel), DEBUG_PROBE);
    751 	return;
    752 }
    753 
    754 void
    755 siisata_setup_channel(struct ata_channel *chp)
    756 {
    757 	return;
    758 }
    759 
    760 int
    761 siisata_exec_command(struct ata_drive_datas *drvp, struct ata_xfer *xfer)
    762 {
    763 	struct ata_channel *chp = drvp->chnl_softc;
    764 	struct ata_command *ata_c = &xfer->c_ata_c;
    765 	int ret;
    766 	int s;
    767 
    768 	SIISATA_DEBUG_PRINT(("%s: %s begins\n",
    769 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), __func__),
    770 	    DEBUG_FUNCS);
    771 
    772 	if (ata_c->flags & AT_POLL)
    773 		xfer->c_flags |= C_POLL;
    774 	if (ata_c->flags & AT_WAIT)
    775 		xfer->c_flags |= C_WAIT;
    776 	xfer->c_drive = drvp->drive;
    777 	xfer->c_databuf = ata_c->data;
    778 	xfer->c_bcount = ata_c->bcount;
    779 	xfer->c_start = siisata_cmd_start;
    780 	xfer->c_intr = siisata_cmd_complete;
    781 	xfer->c_kill_xfer = siisata_cmd_kill_xfer;
    782 	s = splbio();
    783 	ata_exec_xfer(chp, xfer);
    784 #ifdef DIAGNOSTIC
    785 	if ((ata_c->flags & AT_POLL) != 0 &&
    786 	    (ata_c->flags & AT_DONE) == 0)
    787 		panic("%s: polled command not done", __func__);
    788 #endif
    789 	if (ata_c->flags & AT_DONE) {
    790 		ret = ATACMD_COMPLETE;
    791 	} else {
    792 		if (ata_c->flags & AT_WAIT) {
    793 			while ((ata_c->flags & AT_DONE) == 0) {
    794 				SIISATA_DEBUG_PRINT(("%s: %s: sleeping\n",
    795 				    SIISATANAME(
    796 				    (struct siisata_softc *)chp->ch_atac),
    797 				    __func__), DEBUG_FUNCS);
    798 				tsleep(ata_c, PRIBIO, "siicmd", 0);
    799 			}
    800 			ret = ATACMD_COMPLETE;
    801 		} else {
    802 			ret = ATACMD_QUEUED;
    803 		}
    804 	}
    805 	splx(s);
    806 	SIISATA_DEBUG_PRINT( ("%s: %s ends\n",
    807 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), __func__),
    808 	    DEBUG_FUNCS);
    809 	return ret;
    810 }
    811 
    812 void
    813 siisata_cmd_start(struct ata_channel *chp, struct ata_xfer *xfer)
    814 {
    815 	struct siisata_channel *schp = (struct siisata_channel *)chp;
    816 	struct ata_command *ata_c = &xfer->c_ata_c;
    817 	int slot = SIISATA_NON_NCQ_SLOT;
    818 	struct siisata_prb *prb;
    819 	int i;
    820 
    821 	SIISATA_DEBUG_PRINT(("%s: %s port %d drive %d command 0x%x, slot %d\n",
    822 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), __func__,
    823 	    chp->ch_channel, xfer->c_drive, ata_c->r_command, slot),
    824 	    DEBUG_FUNCS|DEBUG_XFERS);
    825 
    826 	chp->ch_status = 0;
    827 	chp->ch_error = 0;
    828 
    829 	prb = schp->sch_prb[slot];
    830 	memset(prb, 0, SIISATA_CMD_SIZE);
    831 
    832 	satafis_rhd_construct_cmd(ata_c, prb->prb_fis);
    833 	KASSERT(xfer->c_drive <= PMP_PORT_CTL);
    834 	prb->prb_fis[rhd_c] |= xfer->c_drive;
    835 
    836 	if (ata_c->r_command == ATA_DATA_SET_MANAGEMENT) {
    837 		prb->prb_control |= htole16(PRB_CF_PROTOCOL_OVERRIDE);
    838 		prb->prb_protocol_override |= htole16(PRB_PO_WRITE);
    839 	}
    840 
    841 	if (siisata_dma_setup(chp, slot,
    842 	    (ata_c->flags & (AT_READ | AT_WRITE)) ? ata_c->data : NULL,
    843 	    ata_c->bcount,
    844 	    (ata_c->flags & AT_READ) ? BUS_DMA_READ : BUS_DMA_WRITE)) {
    845 		ata_c->flags |= AT_DF;
    846 		siisata_cmd_complete(chp, xfer, 0);
    847 		return;
    848 	}
    849 
    850 	if (xfer->c_flags & C_POLL) {
    851 		/* polled command, disable interrupts */
    852 		prb->prb_control = htole16(PRB_CF_INTERRUPT_MASK);
    853 		siisata_disable_port_interrupt(chp);
    854 	}
    855 
    856 	/* go for it */
    857 	siisata_activate_prb(schp, slot);
    858 
    859 	if ((ata_c->flags & AT_POLL) == 0) {
    860 		chp->ch_flags |= ATACH_IRQ_WAIT; /* wait for interrupt */
    861 		callout_reset(&xfer->c_timo_callout, mstohz(ata_c->timeout),
    862 		    siisata_timeout, xfer);
    863 		goto out;
    864 	}
    865 
    866 	/*
    867 	 * polled command
    868 	 */
    869 	for (i = 0; i < ata_c->timeout / 10; i++) {
    870 		if (ata_c->flags & AT_DONE)
    871 			break;
    872 		siisata_intr_port(schp);
    873 		DELAY(1000);
    874 	}
    875 
    876 	if ((ata_c->flags & AT_DONE) == 0) {
    877 		siisata_timeout(xfer);
    878 	}
    879 
    880 	/* reenable interrupts */
    881 	siisata_enable_port_interrupt(chp);
    882 out:
    883 	SIISATA_DEBUG_PRINT(("%s: %s: done\n",
    884 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), __func__),
    885 	    DEBUG_FUNCS);
    886 	return;
    887 }
    888 
    889 void
    890 siisata_cmd_kill_xfer(struct ata_channel *chp, struct ata_xfer *xfer,
    891     int reason)
    892 {
    893 	int slot = SIISATA_NON_NCQ_SLOT;
    894 
    895 	struct ata_command *ata_c = &xfer->c_ata_c;
    896 	switch (reason) {
    897 	case KILL_GONE:
    898 		ata_c->flags |= AT_GONE;
    899 		break;
    900 	case KILL_RESET:
    901 		ata_c->flags |= AT_RESET;
    902 		break;
    903 	default:
    904 		panic("%s: port %d: unknown reason %d",
    905 		   __func__, chp->ch_channel, reason);
    906 	}
    907 	siisata_cmd_done(chp, xfer, slot);
    908 }
    909 
    910 int
    911 siisata_cmd_complete(struct ata_channel *chp, struct ata_xfer *xfer, int is)
    912 {
    913 	struct ata_command *ata_c = &xfer->c_ata_c;
    914 #ifdef SIISATA_DEBUG
    915 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
    916 #endif
    917 	int slot = SIISATA_NON_NCQ_SLOT;
    918 
    919 	SIISATA_DEBUG_PRINT(("%s: %s\n", SIISATANAME(sc), __func__),
    920 	    DEBUG_FUNCS|DEBUG_XFERS);
    921 
    922 	chp->ch_flags &= ~ATACH_IRQ_WAIT;
    923 	if (xfer->c_flags & C_TIMEOU)
    924 		ata_c->flags |= AT_TIMEOU;
    925 	else
    926 		callout_stop(&xfer->c_timo_callout);
    927 
    928 	if (chp->ch_status & WDCS_BSY) {
    929 		ata_c->flags |= AT_TIMEOU;
    930 	} else if (chp->ch_status & WDCS_ERR) {
    931 		ata_c->r_error = chp->ch_error;
    932 		ata_c->flags |= AT_ERROR;
    933 	}
    934 
    935 	ata_deactivate_xfer(chp, xfer);
    936 
    937 	if (!ata_waitdrain_xfer_check(chp, xfer)) {
    938 		siisata_cmd_done(chp, xfer, slot);
    939 	}
    940 
    941 	return 0;
    942 }
    943 
    944 void
    945 siisata_cmd_done(struct ata_channel *chp, struct ata_xfer *xfer, int slot)
    946 {
    947 	uint32_t fis[howmany(RDH_FISLEN,sizeof(uint32_t))];
    948 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
    949 	struct siisata_channel *schp = (struct siisata_channel *)chp;
    950 	struct ata_command *ata_c = &xfer->c_ata_c;
    951 	uint16_t *idwordbuf;
    952 	int i;
    953 
    954 	SIISATA_DEBUG_PRINT(("%s: %s flags 0x%x error 0x%x\n", SIISATANAME(sc),
    955 	    __func__, ata_c->flags, ata_c->r_error), DEBUG_FUNCS|DEBUG_XFERS);
    956 
    957 	siisata_deactivate_prb(schp, slot);
    958 
    959 	if (ata_c->flags & (AT_READ | AT_WRITE)) {
    960 		bus_dmamap_sync(sc->sc_dmat, schp->sch_datad[slot], 0,
    961 		    schp->sch_datad[slot]->dm_mapsize,
    962 		    (ata_c->flags & AT_READ) ? BUS_DMASYNC_POSTREAD :
    963 		    BUS_DMASYNC_POSTWRITE);
    964 		bus_dmamap_unload(sc->sc_dmat, schp->sch_datad[slot]);
    965 	}
    966 
    967 	if (ata_c->flags & AT_READREG) {
    968 		bus_space_read_region_stream_4(sc->sc_prt, sc->sc_prh,
    969 		    PRSX(chp->ch_channel, slot, PRSO_FIS),
    970 		    fis, __arraycount(fis));
    971 		satafis_rdh_cmd_readreg(ata_c, (uint8_t *)fis);
    972 	}
    973 
    974 	/* correct the endianess of IDENTIFY data */
    975 	if (ata_c->r_command == WDCC_IDENTIFY ||
    976 	    ata_c->r_command == ATAPI_IDENTIFY_DEVICE) {
    977 		idwordbuf = xfer->c_databuf;
    978 		for (i = 0; i < (xfer->c_bcount / sizeof(*idwordbuf)); i++) {
    979 			idwordbuf[i] = le16toh(idwordbuf[i]);
    980 		}
    981 	}
    982 
    983 	ata_c->flags |= AT_DONE;
    984 	if (PRREAD(sc, PRSX(chp->ch_channel, slot, PRSO_RTC)))
    985 		ata_c->flags |= AT_XFDONE;
    986 
    987 	if (ata_c->flags & AT_WAIT)
    988 		wakeup(ata_c);
    989 	else if (ata_c->callback)
    990 		ata_c->callback(ata_c->callback_arg);
    991 	atastart(chp);
    992 	return;
    993 }
    994 
    995 int
    996 siisata_ata_bio(struct ata_drive_datas *drvp, struct ata_xfer *xfer)
    997 {
    998 	struct ata_channel *chp = drvp->chnl_softc;
    999 	struct ata_bio *ata_bio = &xfer->c_bio;
   1000 
   1001 	SIISATA_DEBUG_PRINT(("%s: %s.\n",
   1002 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), __func__),
   1003 	    DEBUG_FUNCS);
   1004 
   1005 	if (xfer == NULL)
   1006 		return ATACMD_TRY_AGAIN;
   1007 	if (ata_bio->flags & ATA_POLL)
   1008 		xfer->c_flags |= C_POLL;
   1009 	xfer->c_drive = drvp->drive;
   1010 	xfer->c_databuf = ata_bio->databuf;
   1011 	xfer->c_bcount = ata_bio->bcount;
   1012 	xfer->c_start = siisata_bio_start;
   1013 	xfer->c_intr = siisata_bio_complete;
   1014 	xfer->c_kill_xfer = siisata_bio_kill_xfer;
   1015 	ata_exec_xfer(chp, xfer);
   1016 	return (ata_bio->flags & ATA_ITSDONE) ?
   1017 	    ATACMD_COMPLETE : ATACMD_QUEUED;
   1018 }
   1019 
   1020 void
   1021 siisata_bio_start(struct ata_channel *chp, struct ata_xfer *xfer)
   1022 {
   1023 	struct siisata_channel *schp = (struct siisata_channel *)chp;
   1024 	struct siisata_prb *prb;
   1025 	struct ata_bio *ata_bio = &xfer->c_bio;
   1026 	int slot = SIISATA_NON_NCQ_SLOT;
   1027 	int i;
   1028 
   1029 	SIISATA_DEBUG_PRINT(("%s: %s port %d, slot %d\n",
   1030 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), __func__,
   1031 	    chp->ch_channel, slot), DEBUG_FUNCS);
   1032 
   1033 	chp->ch_status = 0;
   1034 	chp->ch_error = 0;
   1035 
   1036 	prb = schp->sch_prb[slot];
   1037 	memset(prb, 0, SIISATA_CMD_SIZE);
   1038 
   1039 	satafis_rhd_construct_bio(xfer, prb->prb_fis);
   1040 	KASSERT(xfer->c_drive <= PMP_PORT_CTL);
   1041 	prb->prb_fis[rhd_c] |= xfer->c_drive;
   1042 
   1043 	if (siisata_dma_setup(chp, slot, ata_bio->databuf, ata_bio->bcount,
   1044 	    (ata_bio->flags & ATA_READ) ? BUS_DMA_READ : BUS_DMA_WRITE)) {
   1045 		ata_bio->error = ERR_DMA;
   1046 		ata_bio->r_error = 0;
   1047 		siisata_bio_complete(chp, xfer, 0);
   1048 		return;
   1049 	}
   1050 
   1051 	if (xfer->c_flags & C_POLL) {
   1052 		/* polled command, disable interrupts */
   1053 		prb->prb_control = htole16(PRB_CF_INTERRUPT_MASK);
   1054 		siisata_disable_port_interrupt(chp);
   1055 	}
   1056 
   1057 	siisata_activate_prb(schp, slot);
   1058 
   1059 	if ((ata_bio->flags & ATA_POLL) == 0) {
   1060 		chp->ch_flags |= ATACH_IRQ_WAIT; /* wait for interrupt */
   1061 		callout_reset(&xfer->c_timo_callout, mstohz(ATA_DELAY),
   1062 		    siisata_timeout, xfer);
   1063 		goto out;
   1064 	}
   1065 
   1066 	/*
   1067 	 * polled command
   1068 	 */
   1069 	for (i = 0; i < ATA_DELAY / 10; i++) {
   1070 		if (ata_bio->flags & ATA_ITSDONE)
   1071 			break;
   1072 		siisata_intr_port(schp);
   1073 		DELAY(1000);
   1074 	}
   1075 
   1076 	siisata_enable_port_interrupt(chp);
   1077 out:
   1078 	SIISATA_DEBUG_PRINT(("%s: %s: done\n",
   1079 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), __func__),
   1080 	    DEBUG_FUNCS);
   1081 	return;
   1082 }
   1083 
   1084 void
   1085 siisata_bio_kill_xfer(struct ata_channel *chp, struct ata_xfer *xfer,
   1086     int reason)
   1087 {
   1088 	struct siisata_channel *schp = (struct siisata_channel *)chp;
   1089 	struct ata_bio *ata_bio = &xfer->c_bio;
   1090 	int drive = xfer->c_drive;
   1091 	int slot = SIISATA_NON_NCQ_SLOT;
   1092 
   1093 	SIISATA_DEBUG_PRINT(("%s: %s: port %d\n",
   1094 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), __func__,
   1095 	    chp->ch_channel), DEBUG_FUNCS);
   1096 
   1097 	siisata_deactivate_prb(schp, slot);
   1098 
   1099 	ata_bio->flags |= ATA_ITSDONE;
   1100 	switch (reason) {
   1101 	case KILL_GONE:
   1102 		ata_bio->error = ERR_NODEV;
   1103 		break;
   1104 	case KILL_RESET:
   1105 		ata_bio->error = ERR_RESET;
   1106 		break;
   1107 	default:
   1108 		panic("%s: port %d: unknown reason %d",
   1109 		   __func__, chp->ch_channel, reason);
   1110 	}
   1111 	ata_bio->r_error = WDCE_ABRT;
   1112 	(*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc, xfer);
   1113 }
   1114 
   1115 int
   1116 siisata_bio_complete(struct ata_channel *chp, struct ata_xfer *xfer, int is)
   1117 {
   1118 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
   1119 	struct siisata_channel *schp = (struct siisata_channel *)chp;
   1120 	struct ata_bio *ata_bio = &xfer->c_bio;
   1121 	int drive = xfer->c_drive;
   1122 	int slot = SIISATA_NON_NCQ_SLOT;
   1123 
   1124 	schp->sch_active_slots &= ~__BIT(slot);
   1125 	chp->ch_flags &= ~ATACH_IRQ_WAIT;
   1126 	if (xfer->c_flags & C_TIMEOU) {
   1127 		ata_bio->error = TIMEOUT;
   1128 	} else {
   1129 		callout_stop(&xfer->c_timo_callout);
   1130 		ata_bio->error = NOERROR;
   1131 	}
   1132 
   1133 	bus_dmamap_sync(sc->sc_dmat, schp->sch_datad[slot], 0,
   1134 	    schp->sch_datad[slot]->dm_mapsize,
   1135 	    (ata_bio->flags & ATA_READ) ? BUS_DMASYNC_POSTREAD :
   1136 	    BUS_DMASYNC_POSTWRITE);
   1137 	bus_dmamap_unload(sc->sc_dmat, schp->sch_datad[slot]);
   1138 
   1139 	ata_deactivate_xfer(chp, xfer);
   1140 
   1141 	if (ata_waitdrain_xfer_check(chp, xfer)) {
   1142 		return 0;
   1143 	}
   1144 
   1145 	ata_bio->flags |= ATA_ITSDONE;
   1146 	if (chp->ch_status & WDCS_DWF) {
   1147 		ata_bio->error = ERR_DF;
   1148 	} else if (chp->ch_status & WDCS_ERR) {
   1149 		ata_bio->error = ERROR;
   1150 		ata_bio->r_error = chp->ch_error;
   1151 	} else if (chp->ch_status & WDCS_CORR)
   1152 		ata_bio->flags |= ATA_CORR;
   1153 
   1154 	SIISATA_DEBUG_PRINT(("%s: %s bcount: %ld", SIISATANAME(sc), __func__,
   1155 	    ata_bio->bcount), DEBUG_XFERS);
   1156 	if (ata_bio->error == NOERROR) {
   1157 		if (ata_bio->flags & ATA_READ)
   1158 			ata_bio->bcount -=
   1159 			    PRREAD(sc, PRSX(chp->ch_channel, slot, PRSO_RTC));
   1160 		else
   1161 			ata_bio->bcount = 0;
   1162 	}
   1163 	SIISATA_DEBUG_PRINT((" now %ld\n", ata_bio->bcount), DEBUG_XFERS);
   1164 	if (ata_bio->flags & ATA_POLL)
   1165 		return 1;
   1166 	(*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc, xfer);
   1167 	atastart(chp);
   1168 	return 0;
   1169 }
   1170 
   1171 void
   1172 siisata_timeout(void *v)
   1173 {
   1174 	struct ata_xfer *xfer = v;
   1175 	struct ata_channel *chp = xfer->c_chp;
   1176 	int s = splbio();
   1177 	SIISATA_DEBUG_PRINT(("%s: %p\n", __func__, xfer), DEBUG_INTR);
   1178 	siisata_device_reset(chp);
   1179 	if ((chp->ch_flags & ATACH_IRQ_WAIT) != 0) {
   1180 		xfer->c_flags |= C_TIMEOU;
   1181 		xfer->c_intr(chp, xfer, 0);
   1182 	}
   1183 	splx(s);
   1184 }
   1185 
   1186 static int
   1187 siisata_dma_setup(struct ata_channel *chp, int slot, void *data,
   1188     size_t count, int op)
   1189 {
   1190 
   1191 	int error, seg;
   1192 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
   1193 	struct siisata_channel *schp = (struct siisata_channel *)chp;
   1194 
   1195 	struct siisata_prb *prbp;
   1196 
   1197 	prbp = schp->sch_prb[slot];
   1198 
   1199 	if (data == NULL) {
   1200 		goto end;
   1201 	}
   1202 
   1203 	error = bus_dmamap_load(sc->sc_dmat, schp->sch_datad[slot],
   1204 	    data, count, NULL, BUS_DMA_NOWAIT | BUS_DMA_STREAMING | op);
   1205 	if (error) {
   1206 		aprint_error("%s port %d: "
   1207 		    "failed to load xfer in slot %d: error %d\n",
   1208 		    SIISATANAME(sc), chp->ch_channel, slot, error);
   1209 		return error;
   1210 	}
   1211 
   1212 	bus_dmamap_sync(sc->sc_dmat, schp->sch_datad[slot], 0,
   1213 	    schp->sch_datad[slot]->dm_mapsize,
   1214 	    (op == BUS_DMA_READ) ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
   1215 
   1216 	SIISATA_DEBUG_PRINT(("%s: %d segs, %ld count\n", __func__,
   1217 	    schp->sch_datad[slot]->dm_nsegs, (long unsigned int) count),
   1218 	    DEBUG_FUNCS | DEBUG_DEBUG);
   1219 
   1220 	for (seg = 0; seg < schp->sch_datad[slot]->dm_nsegs; seg++) {
   1221 		prbp->prb_sge[seg].sge_da =
   1222 		    htole64(schp->sch_datad[slot]->dm_segs[seg].ds_addr);
   1223 		prbp->prb_sge[seg].sge_dc =
   1224 		    htole32(schp->sch_datad[slot]->dm_segs[seg].ds_len);
   1225 		prbp->prb_sge[seg].sge_flags = htole32(0);
   1226 	}
   1227 	prbp->prb_sge[seg - 1].sge_flags |= htole32(SGE_FLAG_TRM);
   1228 end:
   1229 	return 0;
   1230 }
   1231 
   1232 static void
   1233 siisata_activate_prb(struct siisata_channel *schp, int slot)
   1234 {
   1235 	struct siisata_softc *sc;
   1236 	bus_size_t offset;
   1237 	uint64_t pprb;
   1238 
   1239 	sc = (struct siisata_softc *)schp->ata_channel.ch_atac;
   1240 
   1241 	KASSERTMSG((schp->sch_active_slots & __BIT(slot)) != __BIT(slot),
   1242 	    "%s: trying to activate active slot %d", SIISATANAME(sc), slot);
   1243 
   1244 	SIISATA_PRB_SYNC(sc, schp, slot, BUS_DMASYNC_PREWRITE);
   1245 	/* keep track of what's going on */
   1246 	schp->sch_active_slots |= __BIT(slot);
   1247 
   1248 	offset = PRO_CARX(schp->ata_channel.ch_channel, slot);
   1249 
   1250 	pprb = schp->sch_bus_prb[slot];
   1251 
   1252 	PRWRITE(sc, offset + 0, pprb >>  0);
   1253 	PRWRITE(sc, offset + 4, pprb >> 32);
   1254 }
   1255 
   1256 static void
   1257 siisata_deactivate_prb(struct siisata_channel *schp, int slot)
   1258 {
   1259 	struct siisata_softc *sc;
   1260 
   1261 	sc = (struct siisata_softc *)schp->ata_channel.ch_atac;
   1262 
   1263 	KASSERTMSG((schp->sch_active_slots & __BIT(slot)) != 0,
   1264 	    "%s: trying to deactivate inactive slot %d", SIISATANAME(sc),
   1265 	    slot);
   1266 
   1267 	schp->sch_active_slots &= ~__BIT(slot); /* mark free */
   1268 	SIISATA_PRB_SYNC(sc, schp, slot, BUS_DMASYNC_POSTWRITE);
   1269 }
   1270 
   1271 static void
   1272 siisata_reinit_port(struct ata_channel *chp)
   1273 {
   1274 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
   1275 
   1276 	PRWRITE(sc, PRX(chp->ch_channel, PRO_PCS), PR_PC_PORT_INITIALIZE);
   1277 	while (!(PRREAD(sc, PRX(chp->ch_channel, PRO_PS)) & PR_PS_PORT_READY))
   1278 		DELAY(10);
   1279 	if (chp->ch_ndrives > 1)
   1280 		PRWRITE(sc, PRX(chp->ch_channel, PRO_PCS), PR_PC_PMP_ENABLE);
   1281 }
   1282 
   1283 static void
   1284 siisata_device_reset(struct ata_channel *chp)
   1285 {
   1286 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
   1287 
   1288 	PRWRITE(sc, PRX(chp->ch_channel, PRO_PCS), PR_PC_DEVICE_RESET);
   1289 	while (!(PRREAD(sc, PRX(chp->ch_channel, PRO_PS)) & PR_PS_PORT_READY))
   1290 		DELAY(10);
   1291 }
   1292 
   1293 
   1294 #if NATAPIBUS > 0
   1295 void
   1296 siisata_atapibus_attach(struct atabus_softc *ata_sc)
   1297 {
   1298 	struct ata_channel *chp = ata_sc->sc_chan;
   1299 	struct atac_softc *atac = chp->ch_atac;
   1300 	struct scsipi_adapter *adapt = &atac->atac_atapi_adapter._generic;
   1301 	struct scsipi_channel *chan = &chp->ch_atapi_channel;
   1302 
   1303 	/*
   1304 	 * Fill in the scsipi_adapter.
   1305 	 */
   1306 	adapt->adapt_dev = atac->atac_dev;
   1307 	adapt->adapt_nchannels = atac->atac_nchannels;
   1308 	adapt->adapt_request = siisata_atapi_scsipi_request;
   1309 	adapt->adapt_minphys = siisata_atapi_minphys;
   1310 	atac->atac_atapi_adapter.atapi_probe_device =
   1311 	    siisata_atapi_probe_device;
   1312 
   1313 	/*
   1314 	 * Fill in the scsipi_channel.
   1315 	 */
   1316 	memset(chan, 0, sizeof(*chan));
   1317 	chan->chan_adapter = adapt;
   1318 	chan->chan_bustype = &siisata_atapi_bustype;
   1319 	chan->chan_channel = chp->ch_channel;
   1320 	chan->chan_flags = SCSIPI_CHAN_OPENINGS;
   1321 	chan->chan_openings = 1;
   1322 	chan->chan_max_periph = 1;
   1323 	chan->chan_ntargets = 1;
   1324 	chan->chan_nluns = 1;
   1325 
   1326 	chp->atapibus = config_found_ia(ata_sc->sc_dev, "atapi", chan,
   1327 	    atapiprint);
   1328 }
   1329 
   1330 void
   1331 siisata_atapi_minphys(struct buf *bp)
   1332 {
   1333 	if (bp->b_bcount > MAXPHYS)
   1334 		bp->b_bcount = MAXPHYS;
   1335 	minphys(bp);
   1336 }
   1337 
   1338 /*
   1339  * Kill off all pending xfers for a periph.
   1340  *
   1341  * Must be called at splbio().
   1342  */
   1343 void
   1344 siisata_atapi_kill_pending(struct scsipi_periph *periph)
   1345 {
   1346 	struct atac_softc *atac =
   1347 	    device_private(periph->periph_channel->chan_adapter->adapt_dev);
   1348 	struct ata_channel *chp =
   1349 	    atac->atac_channels[periph->periph_channel->chan_channel];
   1350 
   1351 	ata_kill_pending(&chp->ch_drive[periph->periph_target]);
   1352 }
   1353 
   1354 void
   1355 siisata_atapi_kill_xfer(struct ata_channel *chp, struct ata_xfer *xfer,
   1356     int reason)
   1357 {
   1358 	struct scsipi_xfer *sc_xfer = xfer->c_scsipi;
   1359 
   1360 	/* remove this command from xfer queue */
   1361 	switch (reason) {
   1362 	case KILL_GONE:
   1363 		sc_xfer->error = XS_DRIVER_STUFFUP;
   1364 		break;
   1365 	case KILL_RESET:
   1366 		sc_xfer->error = XS_RESET;
   1367 		break;
   1368 	default:
   1369 		panic("%s: port %d: unknown reason %d",
   1370 		   __func__, chp->ch_channel, reason);
   1371 	}
   1372 	ata_free_xfer(chp, xfer);
   1373 	scsipi_done(sc_xfer);
   1374 }
   1375 
   1376 void
   1377 siisata_atapi_probe_device(struct atapibus_softc *sc, int target)
   1378 {
   1379 	struct scsipi_channel *chan = sc->sc_channel;
   1380 	struct scsipi_periph *periph;
   1381 	struct ataparams ids;
   1382 	struct ataparams *id = &ids;
   1383 	struct siisata_softc *siic =
   1384 	    device_private(chan->chan_adapter->adapt_dev);
   1385 	struct atac_softc *atac = &siic->sc_atac;
   1386 	struct ata_channel *chp = atac->atac_channels[chan->chan_channel];
   1387 	struct ata_drive_datas *drvp = &chp->ch_drive[target];
   1388 	struct scsipibus_attach_args sa;
   1389 	char serial_number[21], model[41], firmware_revision[9];
   1390 	int s;
   1391 
   1392 	/* skip if already attached */
   1393 	if (scsipi_lookup_periph(chan, target, 0) != NULL)
   1394 		return;
   1395 
   1396 	/* if no ATAPI device detected at attach time, skip */
   1397 	if (drvp->drive_type != ATA_DRIVET_ATAPI) {
   1398 		SIISATA_DEBUG_PRINT(("%s: drive %d not present\n", __func__,
   1399 		    target), DEBUG_PROBE);
   1400 		return;
   1401 	}
   1402 
   1403 	/* Some ATAPI devices need a bit more time after software reset. */
   1404 	DELAY(5000);
   1405 	if (ata_get_params(drvp, AT_WAIT, id) == 0) {
   1406 #ifdef ATAPI_DEBUG_PROBE
   1407 		log(LOG_DEBUG, "%s drive %d: cmdsz 0x%x drqtype 0x%x\n",
   1408 		    device_xname(sc->sc_dev), target,
   1409 		    id->atap_config & ATAPI_CFG_CMD_MASK,
   1410 		    id->atap_config & ATAPI_CFG_DRQ_MASK);
   1411 #endif
   1412 		periph = scsipi_alloc_periph(M_NOWAIT);
   1413 		if (periph == NULL) {
   1414 			aprint_error_dev(sc->sc_dev,
   1415 			    "%s: unable to allocate periph for "
   1416 			    "channel %d drive %d\n", __func__,
   1417 			    chp->ch_channel, target);
   1418 			return;
   1419 		}
   1420 		periph->periph_dev = NULL;
   1421 		periph->periph_channel = chan;
   1422 		periph->periph_switch = &atapi_probe_periphsw;
   1423 		periph->periph_target = target;
   1424 		periph->periph_lun = 0;
   1425 		periph->periph_quirks = PQUIRK_ONLYBIG;
   1426 
   1427 #ifdef SCSIPI_DEBUG
   1428 		if (SCSIPI_DEBUG_TYPE == SCSIPI_BUSTYPE_ATAPI &&
   1429 		    SCSIPI_DEBUG_TARGET == target)
   1430 			periph->periph_dbflags |= SCSIPI_DEBUG_FLAGS;
   1431 #endif
   1432 		periph->periph_type = ATAPI_CFG_TYPE(id->atap_config);
   1433 		if (id->atap_config & ATAPI_CFG_REMOV)
   1434 			periph->periph_flags |= PERIPH_REMOVABLE;
   1435 		sa.sa_periph = periph;
   1436 		sa.sa_inqbuf.type = ATAPI_CFG_TYPE(id->atap_config);
   1437 		sa.sa_inqbuf.removable = id->atap_config & ATAPI_CFG_REMOV ?
   1438 		    T_REMOV : T_FIXED;
   1439 		strnvisx(model, sizeof(model), id->atap_model, 40,
   1440 		    VIS_TRIM|VIS_SAFE|VIS_OCTAL);
   1441 		strnvisx(serial_number, sizeof(serial_number),
   1442 		    id->atap_serial, 20, VIS_TRIM|VIS_SAFE|VIS_OCTAL);
   1443 		strnvisx(firmware_revision, sizeof(firmware_revision),
   1444 		    id->atap_revision, 8, VIS_TRIM|VIS_SAFE|VIS_OCTAL);
   1445 		sa.sa_inqbuf.vendor = model;
   1446 		sa.sa_inqbuf.product = serial_number;
   1447 		sa.sa_inqbuf.revision = firmware_revision;
   1448 
   1449 		/*
   1450 		 * Determine the operating mode capabilities of the device.
   1451 		 */
   1452 		if ((id->atap_config & ATAPI_CFG_CMD_MASK)
   1453 		    == ATAPI_CFG_CMD_16) {
   1454 			periph->periph_cap |= PERIPH_CAP_CMD16;
   1455 
   1456 			/* configure port for packet length */
   1457 			PRWRITE(siic, PRX(chp->ch_channel, PRO_PCS),
   1458 			    PR_PC_PACKET_LENGTH);
   1459 		} else {
   1460 			PRWRITE(siic, PRX(chp->ch_channel, PRO_PCC),
   1461 			    PR_PC_PACKET_LENGTH);
   1462 		}
   1463 
   1464 		/* XXX This is gross. */
   1465 		periph->periph_cap |= (id->atap_config & ATAPI_CFG_DRQ_MASK);
   1466 
   1467 		drvp->drv_softc = atapi_probe_device(sc, target, periph, &sa);
   1468 
   1469 		if (drvp->drv_softc)
   1470 			ata_probe_caps(drvp);
   1471 		else {
   1472 			s = splbio();
   1473 			drvp->drive_type &= ATA_DRIVET_NONE;
   1474 			splx(s);
   1475 		}
   1476 	} else {
   1477 		SIISATA_DEBUG_PRINT(("%s: ATAPI_IDENTIFY_DEVICE "
   1478 		    "failed for drive %s:%d:%d: error 0x%x\n",
   1479 		    __func__, SIISATANAME(siic), chp->ch_channel, target,
   1480 		    chp->ch_error), DEBUG_PROBE);
   1481 		s = splbio();
   1482 		drvp->drive_type &= ATA_DRIVET_NONE;
   1483 		splx(s);
   1484 	}
   1485 }
   1486 
   1487 void
   1488 siisata_atapi_scsipi_request(struct scsipi_channel *chan,
   1489     scsipi_adapter_req_t req, void *arg)
   1490 {
   1491 	struct scsipi_adapter *adapt = chan->chan_adapter;
   1492 	struct scsipi_periph *periph;
   1493 	struct scsipi_xfer *sc_xfer;
   1494 	struct siisata_softc *sc = device_private(adapt->adapt_dev);
   1495 	struct atac_softc *atac = &sc->sc_atac;
   1496 	struct ata_xfer *xfer;
   1497 	int channel = chan->chan_channel;
   1498 	int drive, s;
   1499 
   1500 	switch (req) {
   1501 	case ADAPTER_REQ_RUN_XFER:
   1502 		sc_xfer = arg;
   1503 		periph = sc_xfer->xs_periph;
   1504 		drive = periph->periph_target;
   1505 
   1506 		SIISATA_DEBUG_PRINT(("%s: %s:%d:%d\n", __func__,
   1507 		    device_xname(atac->atac_dev), channel, drive),
   1508 		    DEBUG_XFERS);
   1509 
   1510 		if (!device_is_active(atac->atac_dev)) {
   1511 			sc_xfer->error = XS_DRIVER_STUFFUP;
   1512 			scsipi_done(sc_xfer);
   1513 			return;
   1514 		}
   1515 		xfer = ata_get_xfer(atac->atac_channels[channel]);
   1516 		if (xfer == NULL) {
   1517 			sc_xfer->error = XS_RESOURCE_SHORTAGE;
   1518 			scsipi_done(sc_xfer);
   1519 			return;
   1520 		}
   1521 
   1522 		if (sc_xfer->xs_control & XS_CTL_POLL)
   1523 			xfer->c_flags |= C_POLL;
   1524 		xfer->c_drive = drive;
   1525 		xfer->c_flags |= C_ATAPI;
   1526 		xfer->c_scsipi = sc_xfer;
   1527 		xfer->c_databuf = sc_xfer->data;
   1528 		xfer->c_bcount = sc_xfer->datalen;
   1529 		xfer->c_start = siisata_atapi_start;
   1530 		xfer->c_intr = siisata_atapi_complete;
   1531 		xfer->c_kill_xfer = siisata_atapi_kill_xfer;
   1532 		xfer->c_dscpoll = 0;
   1533 		s = splbio();
   1534 		ata_exec_xfer(atac->atac_channels[channel], xfer);
   1535 #ifdef DIAGNOSTIC
   1536 		if ((sc_xfer->xs_control & XS_CTL_POLL) != 0 &&
   1537 		    (sc_xfer->xs_status & XS_STS_DONE) == 0)
   1538 			panic("%s: polled command not done", __func__);
   1539 #endif
   1540 		splx(s);
   1541 		return;
   1542 
   1543 	default:
   1544 		/* Not supported, nothing to do. */
   1545 		;
   1546 	}
   1547 }
   1548 
   1549 void
   1550 siisata_atapi_start(struct ata_channel *chp, struct ata_xfer *xfer)
   1551 {
   1552 	struct siisata_channel *schp = (struct siisata_channel *)chp;
   1553 	struct siisata_prb *prbp;
   1554 
   1555 	struct scsipi_xfer *sc_xfer = xfer->c_scsipi;
   1556 
   1557 	int slot = SIISATA_NON_NCQ_SLOT;
   1558 	int i;
   1559 
   1560 	SIISATA_DEBUG_PRINT( ("%s: %s:%d:%d, scsi flags 0x%x\n", __func__,
   1561 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), chp->ch_channel,
   1562 	    chp->ch_drive[xfer->c_drive].drive, sc_xfer->xs_control),
   1563 	    DEBUG_XFERS);
   1564 
   1565 	chp->ch_status = 0;
   1566 	chp->ch_error = 0;
   1567 
   1568 	prbp = schp->sch_prb[slot];
   1569 	memset(prbp, 0, SIISATA_CMD_SIZE);
   1570 
   1571 	/* fill in direction for ATAPI command */
   1572 	if ((sc_xfer->xs_control & XS_CTL_DATA_IN))
   1573 		prbp->prb_control |= htole16(PRB_CF_PACKET_READ);
   1574 	if ((sc_xfer->xs_control & XS_CTL_DATA_OUT))
   1575 		prbp->prb_control |= htole16(PRB_CF_PACKET_WRITE);
   1576 
   1577 	satafis_rhd_construct_atapi(xfer, prbp->prb_fis);
   1578 	KASSERT(xfer->c_drive <= PMP_PORT_CTL);
   1579 	prbp->prb_fis[rhd_c] |= xfer->c_drive;
   1580 
   1581 	/* copy over ATAPI command */
   1582 	memcpy(prbp->prb_atapi, sc_xfer->cmd, sc_xfer->cmdlen);
   1583 
   1584 	if (siisata_dma_setup(chp, slot,
   1585 		(sc_xfer->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) ?
   1586 		xfer->c_databuf : NULL,
   1587 		xfer->c_bcount,
   1588 		(sc_xfer->xs_control & XS_CTL_DATA_IN) ?
   1589 		BUS_DMA_READ : BUS_DMA_WRITE)
   1590 	)
   1591 		panic("%s", __func__);
   1592 
   1593 	if (xfer->c_flags & C_POLL) {
   1594 		/* polled command, disable interrupts */
   1595 		prbp->prb_control = htole16(PRB_CF_INTERRUPT_MASK);
   1596 		siisata_disable_port_interrupt(chp);
   1597 	}
   1598 
   1599 	siisata_activate_prb(schp, slot);
   1600 
   1601 	if ((xfer->c_flags & C_POLL) == 0) {
   1602 		chp->ch_flags |= ATACH_IRQ_WAIT; /* wait for interrupt */
   1603 		callout_reset(&xfer->c_timo_callout, mstohz(sc_xfer->timeout),
   1604 		    siisata_timeout, xfer);
   1605 		goto out;
   1606 	}
   1607 
   1608 	/*
   1609 	 * polled command
   1610 	 */
   1611 	for (i = 0; i < ATA_DELAY / 10; i++) {
   1612 		if (sc_xfer->xs_status & XS_STS_DONE)
   1613 			break;
   1614 		siisata_intr_port(schp);
   1615 		DELAY(1000);
   1616 	}
   1617 	if ((sc_xfer->xs_status & XS_STS_DONE) == 0) {
   1618 		siisata_timeout(xfer);
   1619 	}
   1620 	/* reenable interrupts */
   1621 	siisata_enable_port_interrupt(chp);
   1622 out:
   1623 	SIISATA_DEBUG_PRINT(("%s: %s: done\n",
   1624 	    SIISATANAME((struct siisata_softc *)chp->ch_atac), __func__),
   1625 	    DEBUG_FUNCS);
   1626 	return;
   1627 }
   1628 
   1629 int
   1630 siisata_atapi_complete(struct ata_channel *chp, struct ata_xfer *xfer,
   1631     int is)
   1632 {
   1633 	struct siisata_softc *sc = (struct siisata_softc *)chp->ch_atac;
   1634 	struct siisata_channel *schp = (struct siisata_channel *)chp;
   1635 	struct scsipi_xfer *sc_xfer = xfer->c_scsipi;
   1636 	int slot = SIISATA_NON_NCQ_SLOT;
   1637 
   1638 	SIISATA_DEBUG_PRINT(("%s: %s()\n", SIISATANAME(sc), __func__),
   1639 	    DEBUG_INTR);
   1640 
   1641 	/* this command is not active any more */
   1642 	schp->sch_active_slots &= ~__BIT(slot);
   1643 	chp->ch_flags &= ~ATACH_IRQ_WAIT;
   1644 	if (xfer->c_flags & C_TIMEOU) {
   1645 		sc_xfer->error = XS_TIMEOUT;
   1646 	} else {
   1647 		callout_stop(&xfer->c_timo_callout);
   1648 		sc_xfer->error = XS_NOERROR;
   1649 	}
   1650 
   1651 	bus_dmamap_sync(sc->sc_dmat, schp->sch_datad[slot], 0,
   1652 	    schp->sch_datad[slot]->dm_mapsize,
   1653 	    (sc_xfer->xs_control & XS_CTL_DATA_IN) ?
   1654 	    BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
   1655 	bus_dmamap_unload(sc->sc_dmat, schp->sch_datad[slot]);
   1656 
   1657 	ata_deactivate_xfer(chp, xfer);
   1658 
   1659 	if (ata_waitdrain_xfer_check(chp, xfer)) {
   1660 		sc_xfer->error = XS_DRIVER_STUFFUP;
   1661 		return 0; /* XXX verify */
   1662 	}
   1663 
   1664 	ata_free_xfer(chp, xfer);
   1665 	sc_xfer->resid = sc_xfer->datalen;
   1666 	sc_xfer->resid -= PRREAD(sc, PRSX(chp->ch_channel, slot, PRSO_RTC));
   1667 	SIISATA_DEBUG_PRINT(("%s: %s datalen %d resid %d\n", SIISATANAME(sc),
   1668 	    __func__, sc_xfer->datalen, sc_xfer->resid), DEBUG_XFERS);
   1669 	if ((chp->ch_status & WDCS_ERR) &&
   1670 	    ((sc_xfer->xs_control & XS_CTL_REQSENSE) == 0 ||
   1671 	    sc_xfer->resid == sc_xfer->datalen)) {
   1672 		sc_xfer->error = XS_SHORTSENSE;
   1673 		sc_xfer->sense.atapi_sense = chp->ch_error;
   1674 		if ((sc_xfer->xs_periph->periph_quirks &
   1675 		    PQUIRK_NOSENSE) == 0) {
   1676 			/* request sense */
   1677 			sc_xfer->error = XS_BUSY;
   1678 			sc_xfer->status = SCSI_CHECK;
   1679 		}
   1680 	}
   1681 	scsipi_done(sc_xfer);
   1682 	atastart(chp);
   1683 	return 0; /* XXX verify */
   1684 }
   1685 
   1686 #endif /* NATAPIBUS */
   1687