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      1 /*	$NetBSD: ld_aac.c,v 1.32 2025/04/13 02:34:03 rin Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: ld_aac.c,v 1.32 2025/04/13 02:34:03 rin Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/kernel.h>
     38 #include <sys/device.h>
     39 #include <sys/buf.h>
     40 #include <sys/bufq.h>
     41 #include <sys/endian.h>
     42 #include <sys/dkio.h>
     43 #include <sys/disk.h>
     44 #include <sys/module.h>
     45 
     46 #include <sys/bus.h>
     47 
     48 #include <dev/ldvar.h>
     49 
     50 #include <dev/ic/aacreg.h>
     51 #include <dev/ic/aacvar.h>
     52 
     53 #include "ioconf.h"
     54 
     55 struct ld_aac_softc {
     56 	struct	ld_softc sc_ld;
     57 	int	sc_hwunit;
     58 };
     59 
     60 static void	ld_aac_attach(device_t, device_t, void *);
     61 static void	ld_aac_intr(struct aac_ccb *);
     62 static int	ld_aac_dobio(struct ld_aac_softc *, void *, int, daddr_t, int,
     63 			     struct buf *);
     64 static int	ld_aac_dump(struct ld_softc *, void *, daddr_t, int);
     65 static int	ld_aac_match(device_t, cfdata_t, void *);
     66 static int	ld_aac_start(struct ld_softc *, struct buf *);
     67 
     68 CFATTACH_DECL_NEW(ld_aac, sizeof(struct ld_aac_softc),
     69     ld_aac_match, ld_aac_attach, NULL, NULL);
     70 
     71 static int
     72 ld_aac_match(device_t parent, cfdata_t match, void *aux)
     73 {
     74 
     75 	return (1);
     76 }
     77 
     78 static void
     79 ld_aac_attach(device_t parent, device_t self, void *aux)
     80 {
     81 	struct aac_attach_args *aaca = aux;
     82 	struct ld_aac_softc *sc = device_private(self);
     83 	struct ld_softc *ld = &sc->sc_ld;
     84 	struct aac_softc *aac = device_private(parent);
     85 	struct aac_drive *hdr = &aac->sc_hdr[aaca->aaca_unit];
     86 
     87 	ld->sc_dv = self;
     88 
     89 	sc->sc_hwunit = aaca->aaca_unit;
     90 	ld->sc_flags = LDF_ENABLED;
     91 	ld->sc_maxxfer = AAC_MAX_XFER(aac);
     92 	ld->sc_secperunit = hdr->hd_size;
     93 	ld->sc_secsize = AAC_SECTOR_SIZE;
     94 	ld->sc_maxqueuecnt =
     95 	    (aac->sc_max_fibs - AAC_NCCBS_RESERVE) / aac->sc_nunits;
     96 	ld->sc_start = ld_aac_start;
     97 	ld->sc_dump = ld_aac_dump;
     98 
     99 	aprint_normal(": %s\n",
    100 	    aac_describe_code(aac_container_types, hdr->hd_devtype));
    101 	ldattach(ld, BUFQ_DISK_DEFAULT_STRAT);
    102 }
    103 
    104 static int
    105 ld_aac_dobio(struct ld_aac_softc *sc, void *data, int datasize, daddr_t blkno,
    106 	     int dowrite, struct buf *bp)
    107 {
    108 	struct aac_blockread_response *brr;
    109 	struct aac_blockwrite_response *bwr;
    110 	struct aac_ccb *ac;
    111 	struct aac_softc *aac;
    112 	struct aac_fib *fib;
    113 	bus_dmamap_t xfer;
    114 	u_int32_t status;
    115 	u_int16_t size;
    116 	int s, rv, i;
    117 
    118 	aac = device_private(device_parent(sc->sc_ld.sc_dv));
    119 
    120 	/*
    121 	 * Allocate a command control block and map the data transfer.
    122 	 */
    123 	ac = aac_ccb_alloc(aac, (dowrite ? AAC_CCB_DATA_OUT : AAC_CCB_DATA_IN));
    124 	if (ac == NULL)
    125 		return EBUSY;
    126 	ac->ac_data = data;
    127 	ac->ac_datalen = datasize;
    128 
    129 	if ((rv = aac_ccb_map(aac, ac)) != 0) {
    130 		aac_ccb_free(aac, ac);
    131 		return (rv);
    132 	}
    133 
    134 	/*
    135 	 * Build the command.
    136 	 */
    137 	fib = ac->ac_fib;
    138 
    139         fib->Header.XferState = htole32(AAC_FIBSTATE_HOSTOWNED |
    140 	    AAC_FIBSTATE_INITIALISED | AAC_FIBSTATE_FROMHOST |
    141 	    AAC_FIBSTATE_REXPECTED | AAC_FIBSTATE_NORM |
    142 	    AAC_FIBSTATE_ASYNC | AAC_FIBSTATE_FAST_RESPONSE );
    143 
    144 	if (aac->sc_quirks & AAC_QUIRK_RAW_IO) {
    145 		struct aac_raw_io *raw;
    146 		struct aac_sg_entryraw *sge;
    147 		struct aac_sg_tableraw *sgt;
    148 
    149 		raw = (struct aac_raw_io *)&fib->data[0];
    150 		fib->Header.Command = htole16(RawIo);
    151 		raw->BlockNumber = htole64(blkno);
    152 		raw->ByteCount = htole32(datasize);
    153 		raw->ContainerId = htole16(sc->sc_hwunit);
    154 		raw->BpTotal = 0;
    155 		raw->BpComplete = 0;
    156 		size = sizeof(struct aac_raw_io);
    157 		sgt = &raw->SgMapRaw;
    158 		raw->Flags = (dowrite ? 0 : 1);
    159 
    160 		xfer = ac->ac_dmamap_xfer;
    161 		sgt->SgCount = xfer->dm_nsegs;
    162 		sge = sgt->SgEntryRaw;
    163 
    164 		for (i = 0; i < xfer->dm_nsegs; i++, sge++) {
    165 			sge->SgAddress = htole64(xfer->dm_segs[i].ds_addr);
    166 			sge->SgByteCount = htole32(xfer->dm_segs[i].ds_len);
    167 			sge->Next = 0;
    168 			sge->Prev = 0;
    169 			sge->Flags = 0;
    170 		}
    171 		size += xfer->dm_nsegs * sizeof(struct aac_sg_entryraw);
    172 		size = sizeof(fib->Header) + size;
    173 		fib->Header.Size = htole16(size);
    174 	} else if ((aac->sc_quirks & AAC_QUIRK_SG_64BIT) == 0) {
    175 		struct aac_blockread *br;
    176 		struct aac_blockwrite *bw;
    177 		struct aac_sg_entry *sge;
    178 		struct aac_sg_table *sgt;
    179 
    180 		fib->Header.Command = htole16(ContainerCommand);
    181 		if (dowrite) {
    182 			bw = (struct aac_blockwrite *)&fib->data[0];
    183 			bw->Command = htole32(VM_CtBlockWrite);
    184 			bw->ContainerId = htole32(sc->sc_hwunit);
    185 			bw->BlockNumber = htole32(blkno);
    186 			bw->ByteCount = htole32(datasize);
    187 			bw->Stable = htole32(CUNSTABLE);
    188 			/* CSTABLE sometimes?  FUA? */
    189 
    190 			size = sizeof(struct aac_blockwrite);
    191 			sgt = &bw->SgMap;
    192 		} else {
    193 			br = (struct aac_blockread *)&fib->data[0];
    194 			br->Command = htole32(VM_CtBlockRead);
    195 			br->ContainerId = htole32(sc->sc_hwunit);
    196 			br->BlockNumber = htole32(blkno);
    197 			br->ByteCount = htole32(datasize);
    198 
    199 			size = sizeof(struct aac_blockread);
    200 			sgt = &br->SgMap;
    201 		}
    202 
    203 		xfer = ac->ac_dmamap_xfer;
    204 		sgt->SgCount = xfer->dm_nsegs;
    205 		sge = sgt->SgEntry;
    206 
    207 		for (i = 0; i < xfer->dm_nsegs; i++, sge++) {
    208 			sge->SgAddress = htole32(xfer->dm_segs[i].ds_addr);
    209 			sge->SgByteCount = htole32(xfer->dm_segs[i].ds_len);
    210 			AAC_DPRINTF(AAC_D_IO,
    211 			    ("#%d va %p pa %" PRIxPADDR " len %zx\n",
    212 			    i, data, xfer->dm_segs[i].ds_addr,
    213 			    xfer->dm_segs[i].ds_len));
    214 		}
    215 
    216 		size += xfer->dm_nsegs * sizeof(struct aac_sg_entry);
    217 		size = sizeof(fib->Header) + size;
    218 		fib->Header.Size = htole16(size);
    219 	} else {
    220 		struct aac_blockread64 *br;
    221 		struct aac_blockwrite64 *bw;
    222 		struct aac_sg_entry64 *sge;
    223 		struct aac_sg_table64 *sgt;
    224 
    225 		fib->Header.Command = htole16(ContainerCommand64);
    226 		if (dowrite) {
    227 			bw = (struct aac_blockwrite64 *)&fib->data[0];
    228 			bw->Command = htole32(VM_CtHostWrite64);
    229 			bw->BlockNumber = htole32(blkno);
    230 			bw->ContainerId = htole16(sc->sc_hwunit);
    231 			bw->SectorCount = htole16(datasize / AAC_BLOCK_SIZE);
    232 			bw->Pad = 0;
    233 			bw->Flags = 0;
    234 
    235 			size = sizeof(struct aac_blockwrite64);
    236 			sgt = &bw->SgMap64;
    237 		} else {
    238 			br = (struct aac_blockread64 *)&fib->data[0];
    239 			br->Command = htole32(VM_CtHostRead64);
    240 			br->BlockNumber = htole32(blkno);
    241 			br->ContainerId = htole16(sc->sc_hwunit);
    242 			br->SectorCount = htole16(datasize / AAC_BLOCK_SIZE);
    243 			br->Pad = 0;
    244 			br->Flags = 0;
    245 
    246 			size = sizeof(struct aac_blockread64);
    247 			sgt = &br->SgMap64;
    248 		}
    249 
    250 		xfer = ac->ac_dmamap_xfer;
    251 		sgt->SgCount = xfer->dm_nsegs;
    252 		sge = sgt->SgEntry64;
    253 
    254 		for (i = 0; i < xfer->dm_nsegs; i++, sge++) {
    255 			/*
    256 			 * XXX - This is probably an alignment issue on non-x86
    257 			 * platforms since this is a packed array of 64/32-bit
    258 			 * tuples, so every other SgAddress is 32-bit, but not
    259 			 * 64-bit aligned.
    260 			 */
    261 			sge->SgAddress = htole64(xfer->dm_segs[i].ds_addr);
    262 			sge->SgByteCount = htole32(xfer->dm_segs[i].ds_len);
    263 			AAC_DPRINTF(AAC_D_IO,
    264 			    ("#%d va %p pa %" PRIxPADDR " len %zx\n",
    265 			    i, data, xfer->dm_segs[i].ds_addr,
    266 			    xfer->dm_segs[i].ds_len));
    267 		}
    268 		size += xfer->dm_nsegs * sizeof(struct aac_sg_entry64);
    269 		size = sizeof(fib->Header) + size;
    270 		fib->Header.Size = htole16(size);
    271 	}
    272 
    273 	if (bp == NULL) {
    274 		/*
    275 		 * Polled commands must not sit on the software queue.  Wait
    276 		 * up to 30 seconds for the command to complete.
    277 		 */
    278 		s = splbio();
    279 		rv = aac_ccb_poll(aac, ac, 30000);
    280 		aac_ccb_unmap(aac, ac);
    281 		aac_ccb_free(aac, ac);
    282 		splx(s);
    283 
    284 		if (rv == 0) {
    285 			if (dowrite) {
    286 				bwr = (struct aac_blockwrite_response *)
    287 				    &ac->ac_fib->data[0];
    288 				status = le32toh(bwr->Status);
    289 			} else {
    290 				brr = (struct aac_blockread_response *)
    291 				    &ac->ac_fib->data[0];
    292 				status = le32toh(brr->Status);
    293 			}
    294 
    295 			if (status != ST_OK) {
    296 				device_printf(sc->sc_ld.sc_dv,
    297 				    "I/O error: %s\n",
    298 				    aac_describe_code(aac_command_status_table,
    299 				    status));
    300 				rv = EIO;
    301 			}
    302 		}
    303 	} else {
    304 		ac->ac_device = sc->sc_ld.sc_dv;
    305 		ac->ac_context = bp;
    306 		ac->ac_intr = ld_aac_intr;
    307 		aac_ccb_enqueue(aac, ac);
    308 		rv = 0;
    309 	}
    310 
    311 	return (rv);
    312 }
    313 
    314 static int
    315 ld_aac_start(struct ld_softc *ld, struct buf *bp)
    316 {
    317 
    318 	return (ld_aac_dobio((struct ld_aac_softc *)ld, bp->b_data,
    319 	    bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp));
    320 }
    321 
    322 static void
    323 ld_aac_intr(struct aac_ccb *ac)
    324 {
    325 	struct aac_blockread_response *brr;
    326 	struct aac_blockwrite_response *bwr;
    327 	struct ld_aac_softc *sc;
    328 	struct aac_softc *aac;
    329 	struct buf *bp;
    330 	u_int32_t status;
    331 
    332 	bp = ac->ac_context;
    333 	sc = device_private(ac->ac_device);
    334 	aac = device_private(device_parent(ac->ac_device));
    335 
    336 	if ((bp->b_flags & B_READ) != 0) {
    337 		brr = (struct aac_blockread_response *)&ac->ac_fib->data[0];
    338 		status = le32toh(brr->Status);
    339 	} else {
    340 		bwr = (struct aac_blockwrite_response *)&ac->ac_fib->data[0];
    341 		status = le32toh(bwr->Status);
    342 	}
    343 
    344 	aac_ccb_unmap(aac, ac);
    345 	aac_ccb_free(aac, ac);
    346 
    347 	if (status != ST_OK) {
    348 		bp->b_error = EIO;
    349 		bp->b_resid = bp->b_bcount;
    350 
    351 		device_printf(sc->sc_ld.sc_dv, "I/O error: %s\n",
    352 		    aac_describe_code(aac_command_status_table, status));
    353 	} else
    354 		bp->b_resid = 0;
    355 
    356 	lddone(&sc->sc_ld, bp);
    357 }
    358 
    359 static int
    360 ld_aac_dump(struct ld_softc *ld, void *data, daddr_t blkno, int blkcnt)
    361 {
    362 
    363 	return (ld_aac_dobio((struct ld_aac_softc *)ld, data,
    364 	    blkcnt * ld->sc_secsize, blkno, 1, NULL));
    365 }
    366 
    367 MODULE(MODULE_CLASS_DRIVER, ld_aac, "ld,aac");
    368 
    369 #ifdef _MODULE
    370 /*
    371  * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd"
    372  * XXX it will be defined in the common-code module
    373  */
    374 #undef  CFDRIVER_DECL
    375 #define CFDRIVER_DECL(name, class, attr)
    376 #include "ioconf.c"
    377 #endif
    378 
    379 static int
    380 ld_aac_modcmd(modcmd_t cmd, void *opaque)
    381 {
    382 #ifdef _MODULE
    383 	/*
    384 	 * We ignore the cfdriver_vec[] that ioconf provides, since
    385 	 * the cfdrivers are attached already.
    386 	 */
    387 	static struct cfdriver * const no_cfdriver_vec[] = { NULL };
    388 #endif
    389 	int error = 0;
    390 
    391 #ifdef _MODULE
    392 	switch (cmd) {
    393 	case MODULE_CMD_INIT:
    394 		error = config_init_component(no_cfdriver_vec,
    395 		    cfattach_ioconf_ld_aac, cfdata_ioconf_ld_aac);
    396 		break;
    397 	case MODULE_CMD_FINI:
    398 		error = config_fini_component(no_cfdriver_vec,
    399 		    cfattach_ioconf_ld_aac, cfdata_ioconf_ld_aac);
    400 		break;
    401 	default:
    402 		error = ENOTTY;
    403 		break;
    404 	}
    405 #endif
    406 
    407 	return error;
    408 }
    409 
    410