cac.c revision 1.15.2.2
1 1.15.2.2 bouyer /* $NetBSD: cac.c,v 1.15.2.2 2000/11/20 11:40:25 bouyer Exp $ */ 2 1.15.2.2 bouyer 3 1.15.2.2 bouyer /*- 4 1.15.2.2 bouyer * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 1.15.2.2 bouyer * All rights reserved. 6 1.15.2.2 bouyer * 7 1.15.2.2 bouyer * This code is derived from software contributed to The NetBSD Foundation 8 1.15.2.2 bouyer * by Andrew Doran. 9 1.15.2.2 bouyer * 10 1.15.2.2 bouyer * Redistribution and use in source and binary forms, with or without 11 1.15.2.2 bouyer * modification, are permitted provided that the following conditions 12 1.15.2.2 bouyer * are met: 13 1.15.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 14 1.15.2.2 bouyer * notice, this list of conditions and the following disclaimer. 15 1.15.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 16 1.15.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 17 1.15.2.2 bouyer * documentation and/or other materials provided with the distribution. 18 1.15.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 19 1.15.2.2 bouyer * must display the following acknowledgement: 20 1.15.2.2 bouyer * This product includes software developed by the NetBSD 21 1.15.2.2 bouyer * Foundation, Inc. and its contributors. 22 1.15.2.2 bouyer * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.15.2.2 bouyer * contributors may be used to endorse or promote products derived 24 1.15.2.2 bouyer * from this software without specific prior written permission. 25 1.15.2.2 bouyer * 26 1.15.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.15.2.2 bouyer * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.15.2.2 bouyer * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.15.2.2 bouyer * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.15.2.2 bouyer * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.15.2.2 bouyer * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.15.2.2 bouyer * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.15.2.2 bouyer * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.15.2.2 bouyer * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.15.2.2 bouyer * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.15.2.2 bouyer * POSSIBILITY OF SUCH DAMAGE. 37 1.15.2.2 bouyer */ 38 1.15.2.2 bouyer 39 1.15.2.2 bouyer /* 40 1.15.2.2 bouyer * Driver for Compaq array controllers. 41 1.15.2.2 bouyer */ 42 1.15.2.2 bouyer 43 1.15.2.2 bouyer #include <sys/param.h> 44 1.15.2.2 bouyer #include <sys/systm.h> 45 1.15.2.2 bouyer #include <sys/kernel.h> 46 1.15.2.2 bouyer #include <sys/device.h> 47 1.15.2.2 bouyer #include <sys/queue.h> 48 1.15.2.2 bouyer #include <sys/proc.h> 49 1.15.2.2 bouyer #include <sys/buf.h> 50 1.15.2.2 bouyer #include <sys/endian.h> 51 1.15.2.2 bouyer #include <sys/malloc.h> 52 1.15.2.2 bouyer #include <sys/pool.h> 53 1.15.2.2 bouyer 54 1.15.2.2 bouyer #include <machine/bswap.h> 55 1.15.2.2 bouyer #include <machine/bus.h> 56 1.15.2.2 bouyer 57 1.15.2.2 bouyer #include <dev/ic/cacreg.h> 58 1.15.2.2 bouyer #include <dev/ic/cacvar.h> 59 1.15.2.2 bouyer 60 1.15.2.2 bouyer static struct cac_ccb *cac_ccb_alloc(struct cac_softc *, int); 61 1.15.2.2 bouyer static void cac_ccb_done(struct cac_softc *, struct cac_ccb *); 62 1.15.2.2 bouyer static void cac_ccb_free(struct cac_softc *, struct cac_ccb *); 63 1.15.2.2 bouyer static int cac_ccb_poll(struct cac_softc *, struct cac_ccb *, int); 64 1.15.2.2 bouyer static int cac_ccb_start(struct cac_softc *, struct cac_ccb *); 65 1.15.2.2 bouyer static int cac_print(void *, const char *); 66 1.15.2.2 bouyer static void cac_shutdown(void *); 67 1.15.2.2 bouyer static int cac_submatch(struct device *, struct cfdata *, void *); 68 1.15.2.2 bouyer 69 1.15.2.2 bouyer static struct cac_ccb *cac_l0_completed(struct cac_softc *); 70 1.15.2.2 bouyer static int cac_l0_fifo_full(struct cac_softc *); 71 1.15.2.2 bouyer static void cac_l0_intr_enable(struct cac_softc *, int); 72 1.15.2.2 bouyer static int cac_l0_intr_pending(struct cac_softc *); 73 1.15.2.2 bouyer static void cac_l0_submit(struct cac_softc *, struct cac_ccb *); 74 1.15.2.2 bouyer 75 1.15.2.2 bouyer static void *cac_sdh; /* shutdown hook */ 76 1.15.2.2 bouyer 77 1.15.2.2 bouyer struct cac_linkage cac_l0 = { 78 1.15.2.2 bouyer cac_l0_completed, 79 1.15.2.2 bouyer cac_l0_fifo_full, 80 1.15.2.2 bouyer cac_l0_intr_enable, 81 1.15.2.2 bouyer cac_l0_intr_pending, 82 1.15.2.2 bouyer cac_l0_submit 83 1.15.2.2 bouyer }; 84 1.15.2.2 bouyer 85 1.15.2.2 bouyer /* 86 1.15.2.2 bouyer * Initialise our interface to the controller. 87 1.15.2.2 bouyer */ 88 1.15.2.2 bouyer int 89 1.15.2.2 bouyer cac_init(struct cac_softc *sc, const char *intrstr, int startfw) 90 1.15.2.2 bouyer { 91 1.15.2.2 bouyer struct cac_controller_info cinfo; 92 1.15.2.2 bouyer struct cac_attach_args caca; 93 1.15.2.2 bouyer int error, rseg, size, i; 94 1.15.2.2 bouyer bus_dma_segment_t seg; 95 1.15.2.2 bouyer struct cac_ccb *ccb; 96 1.15.2.2 bouyer 97 1.15.2.2 bouyer if (intrstr != NULL) 98 1.15.2.2 bouyer printf("%s: interrupting at %s\n", sc->sc_dv.dv_xname, 99 1.15.2.2 bouyer intrstr); 100 1.15.2.2 bouyer 101 1.15.2.2 bouyer SIMPLEQ_INIT(&sc->sc_ccb_free); 102 1.15.2.2 bouyer SIMPLEQ_INIT(&sc->sc_ccb_queue); 103 1.15.2.2 bouyer 104 1.15.2.2 bouyer size = sizeof(struct cac_ccb) * CAC_MAX_CCBS; 105 1.15.2.2 bouyer 106 1.15.2.2 bouyer if ((error = bus_dmamem_alloc(sc->sc_dmat, size, NBPG, 0, &seg, 1, 107 1.15.2.2 bouyer &rseg, BUS_DMA_NOWAIT)) != 0) { 108 1.15.2.2 bouyer printf("%s: unable to allocate CCBs, error = %d\n", 109 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 110 1.15.2.2 bouyer return (-1); 111 1.15.2.2 bouyer } 112 1.15.2.2 bouyer 113 1.15.2.2 bouyer if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, size, 114 1.15.2.2 bouyer (caddr_t *)&sc->sc_ccbs, 115 1.15.2.2 bouyer BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) { 116 1.15.2.2 bouyer printf("%s: unable to map CCBs, error = %d\n", 117 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 118 1.15.2.2 bouyer return (-1); 119 1.15.2.2 bouyer } 120 1.15.2.2 bouyer 121 1.15.2.2 bouyer if ((error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0, 122 1.15.2.2 bouyer BUS_DMA_NOWAIT, &sc->sc_dmamap)) != 0) { 123 1.15.2.2 bouyer printf("%s: unable to create CCB DMA map, error = %d\n", 124 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 125 1.15.2.2 bouyer return (-1); 126 1.15.2.2 bouyer } 127 1.15.2.2 bouyer 128 1.15.2.2 bouyer if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap, sc->sc_ccbs, 129 1.15.2.2 bouyer size, NULL, BUS_DMA_NOWAIT)) != 0) { 130 1.15.2.2 bouyer printf("%s: unable to load CCB DMA map, error = %d\n", 131 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 132 1.15.2.2 bouyer return (-1); 133 1.15.2.2 bouyer } 134 1.15.2.2 bouyer 135 1.15.2.2 bouyer sc->sc_ccbs_paddr = sc->sc_dmamap->dm_segs[0].ds_addr; 136 1.15.2.2 bouyer memset(sc->sc_ccbs, 0, size); 137 1.15.2.2 bouyer ccb = (struct cac_ccb *)sc->sc_ccbs; 138 1.15.2.2 bouyer 139 1.15.2.2 bouyer for (i = 0; i < CAC_MAX_CCBS; i++, ccb++) { 140 1.15.2.2 bouyer /* Create the DMA map for this CCB's data */ 141 1.15.2.2 bouyer error = bus_dmamap_create(sc->sc_dmat, CAC_MAX_XFER, 142 1.15.2.2 bouyer CAC_SG_SIZE, CAC_MAX_XFER, 0, 143 1.15.2.2 bouyer BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, 144 1.15.2.2 bouyer &ccb->ccb_dmamap_xfer); 145 1.15.2.2 bouyer 146 1.15.2.2 bouyer if (error) { 147 1.15.2.2 bouyer printf("%s: can't create ccb dmamap (%d)\n", 148 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 149 1.15.2.2 bouyer break; 150 1.15.2.2 bouyer } 151 1.15.2.2 bouyer 152 1.15.2.2 bouyer ccb->ccb_flags = 0; 153 1.15.2.2 bouyer ccb->ccb_paddr = sc->sc_ccbs_paddr + i * sizeof(struct cac_ccb); 154 1.15.2.2 bouyer SIMPLEQ_INSERT_TAIL(&sc->sc_ccb_free, ccb, ccb_chain); 155 1.15.2.2 bouyer } 156 1.15.2.2 bouyer 157 1.15.2.2 bouyer /* Start firmware background tasks, if needed. */ 158 1.15.2.2 bouyer if (startfw) { 159 1.15.2.2 bouyer if (cac_cmd(sc, CAC_CMD_START_FIRMWARE, &cinfo, sizeof(cinfo), 160 1.15.2.2 bouyer 0, 0, CAC_CCB_DATA_IN, NULL)) { 161 1.15.2.2 bouyer printf("%s: CAC_CMD_START_FIRMWARE failed\n", 162 1.15.2.2 bouyer sc->sc_dv.dv_xname); 163 1.15.2.2 bouyer return (-1); 164 1.15.2.2 bouyer } 165 1.15.2.2 bouyer } 166 1.15.2.2 bouyer 167 1.15.2.2 bouyer if (cac_cmd(sc, CAC_CMD_GET_CTRL_INFO, &cinfo, sizeof(cinfo), 0, 0, 168 1.15.2.2 bouyer CAC_CCB_DATA_IN, NULL)) { 169 1.15.2.2 bouyer printf("%s: CAC_CMD_GET_CTRL_INFO failed\n", 170 1.15.2.2 bouyer sc->sc_dv.dv_xname); 171 1.15.2.2 bouyer return (-1); 172 1.15.2.2 bouyer } 173 1.15.2.2 bouyer 174 1.15.2.2 bouyer for (i = 0; i < cinfo.num_drvs; i++) { 175 1.15.2.2 bouyer caca.caca_unit = i; 176 1.15.2.2 bouyer config_found_sm(&sc->sc_dv, &caca, cac_print, cac_submatch); 177 1.15.2.2 bouyer } 178 1.15.2.2 bouyer 179 1.15.2.2 bouyer /* Set our `shutdownhook' before we start any device activity. */ 180 1.15.2.2 bouyer if (cac_sdh == NULL) 181 1.15.2.2 bouyer cac_sdh = shutdownhook_establish(cac_shutdown, NULL); 182 1.15.2.2 bouyer 183 1.15.2.2 bouyer (*sc->sc_cl->cl_intr_enable)(sc, CAC_INTR_ENABLE); 184 1.15.2.2 bouyer return (0); 185 1.15.2.2 bouyer } 186 1.15.2.2 bouyer 187 1.15.2.2 bouyer /* 188 1.15.2.2 bouyer * Shut down all `cac' controllers. 189 1.15.2.2 bouyer */ 190 1.15.2.2 bouyer static void 191 1.15.2.2 bouyer cac_shutdown(void *cookie) 192 1.15.2.2 bouyer { 193 1.15.2.2 bouyer extern struct cfdriver cac_cd; 194 1.15.2.2 bouyer struct cac_softc *sc; 195 1.15.2.2 bouyer u_int8_t buf[512]; 196 1.15.2.2 bouyer int i; 197 1.15.2.2 bouyer 198 1.15.2.2 bouyer for (i = 0; i < cac_cd.cd_ndevs; i++) { 199 1.15.2.2 bouyer if ((sc = device_lookup(&cac_cd, i)) == NULL) 200 1.15.2.2 bouyer continue; 201 1.15.2.2 bouyer memset(buf, 0, sizeof(buf)); 202 1.15.2.2 bouyer buf[0] = 1; 203 1.15.2.2 bouyer cac_cmd(sc, CAC_CMD_FLUSH_CACHE, buf, sizeof(buf), 0, 0, 204 1.15.2.2 bouyer CAC_CCB_DATA_OUT, NULL); 205 1.15.2.2 bouyer } 206 1.15.2.2 bouyer } 207 1.15.2.2 bouyer 208 1.15.2.2 bouyer /* 209 1.15.2.2 bouyer * Print autoconfiguration message for a sub-device. 210 1.15.2.2 bouyer */ 211 1.15.2.2 bouyer static int 212 1.15.2.2 bouyer cac_print(void *aux, const char *pnp) 213 1.15.2.2 bouyer { 214 1.15.2.2 bouyer struct cac_attach_args *caca; 215 1.15.2.2 bouyer 216 1.15.2.2 bouyer caca = (struct cac_attach_args *)aux; 217 1.15.2.2 bouyer 218 1.15.2.2 bouyer if (pnp != NULL) 219 1.15.2.2 bouyer printf("block device at %s", pnp); 220 1.15.2.2 bouyer printf(" unit %d", caca->caca_unit); 221 1.15.2.2 bouyer return (UNCONF); 222 1.15.2.2 bouyer } 223 1.15.2.2 bouyer 224 1.15.2.2 bouyer /* 225 1.15.2.2 bouyer * Match a sub-device. 226 1.15.2.2 bouyer */ 227 1.15.2.2 bouyer static int 228 1.15.2.2 bouyer cac_submatch(struct device *parent, struct cfdata *cf, void *aux) 229 1.15.2.2 bouyer { 230 1.15.2.2 bouyer struct cac_attach_args *caca; 231 1.15.2.2 bouyer 232 1.15.2.2 bouyer caca = (struct cac_attach_args *)aux; 233 1.15.2.2 bouyer 234 1.15.2.2 bouyer if (cf->cacacf_unit != CACCF_UNIT_DEFAULT && 235 1.15.2.2 bouyer cf->cacacf_unit != caca->caca_unit) 236 1.15.2.2 bouyer return (0); 237 1.15.2.2 bouyer 238 1.15.2.2 bouyer return (cf->cf_attach->ca_match(parent, cf, aux)); 239 1.15.2.2 bouyer } 240 1.15.2.2 bouyer 241 1.15.2.2 bouyer /* 242 1.15.2.2 bouyer * Handle an interrupt from the controller: process finished CCBs and 243 1.15.2.2 bouyer * dequeue any waiting CCBs. 244 1.15.2.2 bouyer */ 245 1.15.2.2 bouyer int 246 1.15.2.2 bouyer cac_intr(void *cookie) 247 1.15.2.2 bouyer { 248 1.15.2.2 bouyer struct cac_softc *sc; 249 1.15.2.2 bouyer struct cac_ccb *ccb; 250 1.15.2.2 bouyer 251 1.15.2.2 bouyer sc = (struct cac_softc *)cookie; 252 1.15.2.2 bouyer 253 1.15.2.2 bouyer if (!(*sc->sc_cl->cl_intr_pending)(sc)) { 254 1.15.2.2 bouyer #ifdef DEBUG 255 1.15.2.2 bouyer printf("%s: spurious intr\n", sc->sc_dv.dv_xname); 256 1.15.2.2 bouyer #endif 257 1.15.2.2 bouyer return (0); 258 1.15.2.2 bouyer } 259 1.15.2.2 bouyer 260 1.15.2.2 bouyer while ((ccb = (*sc->sc_cl->cl_completed)(sc)) != NULL) { 261 1.15.2.2 bouyer cac_ccb_done(sc, ccb); 262 1.15.2.2 bouyer cac_ccb_start(sc, NULL); 263 1.15.2.2 bouyer } 264 1.15.2.2 bouyer 265 1.15.2.2 bouyer return (1); 266 1.15.2.2 bouyer } 267 1.15.2.2 bouyer 268 1.15.2.2 bouyer /* 269 1.15.2.2 bouyer * Execute a [polled] command. 270 1.15.2.2 bouyer */ 271 1.15.2.2 bouyer int 272 1.15.2.2 bouyer cac_cmd(struct cac_softc *sc, int command, void *data, int datasize, 273 1.15.2.2 bouyer int drive, int blkno, int flags, struct cac_context *context) 274 1.15.2.2 bouyer { 275 1.15.2.2 bouyer struct cac_ccb *ccb; 276 1.15.2.2 bouyer struct cac_sgb *sgb; 277 1.15.2.2 bouyer int s, i, rv, size, nsegs; 278 1.15.2.2 bouyer 279 1.15.2.2 bouyer size = 0; 280 1.15.2.2 bouyer 281 1.15.2.2 bouyer if ((ccb = cac_ccb_alloc(sc, 0)) == NULL) { 282 1.15.2.2 bouyer printf("%s: unable to alloc CCB", sc->sc_dv.dv_xname); 283 1.15.2.2 bouyer return (ENOMEM); 284 1.15.2.2 bouyer } 285 1.15.2.2 bouyer 286 1.15.2.2 bouyer if ((flags & (CAC_CCB_DATA_IN | CAC_CCB_DATA_OUT)) != 0) { 287 1.15.2.2 bouyer bus_dmamap_load(sc->sc_dmat, ccb->ccb_dmamap_xfer, 288 1.15.2.2 bouyer (void *)data, datasize, NULL, BUS_DMA_NOWAIT); 289 1.15.2.2 bouyer 290 1.15.2.2 bouyer bus_dmamap_sync(sc->sc_dmat, ccb->ccb_dmamap_xfer, 0, datasize, 291 1.15.2.2 bouyer (flags & CAC_CCB_DATA_IN) != 0 ? BUS_DMASYNC_PREREAD : 292 1.15.2.2 bouyer BUS_DMASYNC_PREWRITE); 293 1.15.2.2 bouyer 294 1.15.2.2 bouyer sgb = ccb->ccb_seg; 295 1.15.2.2 bouyer nsegs = min(ccb->ccb_dmamap_xfer->dm_nsegs, CAC_SG_SIZE); 296 1.15.2.2 bouyer 297 1.15.2.2 bouyer for (i = 0; i < nsegs; i++, sgb++) { 298 1.15.2.2 bouyer size += ccb->ccb_dmamap_xfer->dm_segs[i].ds_len; 299 1.15.2.2 bouyer sgb->length = 300 1.15.2.2 bouyer htole32(ccb->ccb_dmamap_xfer->dm_segs[i].ds_len); 301 1.15.2.2 bouyer sgb->addr = 302 1.15.2.2 bouyer htole32(ccb->ccb_dmamap_xfer->dm_segs[i].ds_addr); 303 1.15.2.2 bouyer } 304 1.15.2.2 bouyer } else { 305 1.15.2.2 bouyer size = datasize; 306 1.15.2.2 bouyer nsegs = 0; 307 1.15.2.2 bouyer } 308 1.15.2.2 bouyer 309 1.15.2.2 bouyer ccb->ccb_hdr.drive = drive; 310 1.15.2.2 bouyer ccb->ccb_hdr.size = htole16((sizeof(struct cac_req) + 311 1.15.2.2 bouyer sizeof(struct cac_sgb) * CAC_SG_SIZE) >> 2); 312 1.15.2.2 bouyer 313 1.15.2.2 bouyer ccb->ccb_req.bcount = htole16(howmany(size, DEV_BSIZE)); 314 1.15.2.2 bouyer ccb->ccb_req.command = command; 315 1.15.2.2 bouyer ccb->ccb_req.sgcount = nsegs; 316 1.15.2.2 bouyer ccb->ccb_req.blkno = htole32(blkno); 317 1.15.2.2 bouyer 318 1.15.2.2 bouyer ccb->ccb_flags = flags; 319 1.15.2.2 bouyer ccb->ccb_datasize = size; 320 1.15.2.2 bouyer 321 1.15.2.2 bouyer if (context == NULL) { 322 1.15.2.2 bouyer memset(&ccb->ccb_context, 0, sizeof(struct cac_context)); 323 1.15.2.2 bouyer s = splbio(); 324 1.15.2.2 bouyer 325 1.15.2.2 bouyer /* Synchronous commands musn't wait. */ 326 1.15.2.2 bouyer if ((*sc->sc_cl->cl_fifo_full)(sc)) { 327 1.15.2.2 bouyer cac_ccb_free(sc, ccb); 328 1.15.2.2 bouyer rv = -1; 329 1.15.2.2 bouyer } else { 330 1.15.2.2 bouyer #ifdef DIAGNOSTIC 331 1.15.2.2 bouyer ccb->ccb_flags |= CAC_CCB_ACTIVE; 332 1.15.2.2 bouyer #endif 333 1.15.2.2 bouyer (*sc->sc_cl->cl_submit)(sc, ccb); 334 1.15.2.2 bouyer rv = cac_ccb_poll(sc, ccb, 2000); 335 1.15.2.2 bouyer cac_ccb_free(sc, ccb); 336 1.15.2.2 bouyer } 337 1.15.2.2 bouyer } else { 338 1.15.2.2 bouyer memcpy(&ccb->ccb_context, context, sizeof(struct cac_context)); 339 1.15.2.2 bouyer s = splbio(); 340 1.15.2.2 bouyer rv = cac_ccb_start(sc, ccb); 341 1.15.2.2 bouyer } 342 1.15.2.2 bouyer 343 1.15.2.2 bouyer splx(s); 344 1.15.2.2 bouyer return (rv); 345 1.15.2.2 bouyer } 346 1.15.2.2 bouyer 347 1.15.2.2 bouyer /* 348 1.15.2.2 bouyer * Wait for the specified CCB to complete. Must be called at splbio. 349 1.15.2.2 bouyer */ 350 1.15.2.2 bouyer static int 351 1.15.2.2 bouyer cac_ccb_poll(struct cac_softc *sc, struct cac_ccb *wantccb, int timo) 352 1.15.2.2 bouyer { 353 1.15.2.2 bouyer struct cac_ccb *ccb; 354 1.15.2.2 bouyer 355 1.15.2.2 bouyer timo *= 10; 356 1.15.2.2 bouyer 357 1.15.2.2 bouyer do { 358 1.15.2.2 bouyer for (; timo != 0; timo--) { 359 1.15.2.2 bouyer if ((ccb = (*sc->sc_cl->cl_completed)(sc)) != NULL) 360 1.15.2.2 bouyer break; 361 1.15.2.2 bouyer DELAY(100); 362 1.15.2.2 bouyer } 363 1.15.2.2 bouyer 364 1.15.2.2 bouyer if (timo == 0) { 365 1.15.2.2 bouyer printf("%s: timeout", sc->sc_dv.dv_xname); 366 1.15.2.2 bouyer return (EBUSY); 367 1.15.2.2 bouyer } 368 1.15.2.2 bouyer cac_ccb_done(sc, ccb); 369 1.15.2.2 bouyer } while (ccb != wantccb); 370 1.15.2.2 bouyer 371 1.15.2.2 bouyer return (0); 372 1.15.2.2 bouyer } 373 1.15.2.2 bouyer 374 1.15.2.2 bouyer /* 375 1.15.2.2 bouyer * Enqueue the specifed command (if any) and attempt to start all enqueued 376 1.15.2.2 bouyer * commands. Must be called at splbio. 377 1.15.2.2 bouyer */ 378 1.15.2.2 bouyer static int 379 1.15.2.2 bouyer cac_ccb_start(struct cac_softc *sc, struct cac_ccb *ccb) 380 1.15.2.2 bouyer { 381 1.15.2.2 bouyer 382 1.15.2.2 bouyer if (ccb != NULL) 383 1.15.2.2 bouyer SIMPLEQ_INSERT_TAIL(&sc->sc_ccb_queue, ccb, ccb_chain); 384 1.15.2.2 bouyer 385 1.15.2.2 bouyer while ((ccb = SIMPLEQ_FIRST(&sc->sc_ccb_queue)) != NULL) { 386 1.15.2.2 bouyer if ((*sc->sc_cl->cl_fifo_full)(sc)) 387 1.15.2.2 bouyer return (EBUSY); 388 1.15.2.2 bouyer SIMPLEQ_REMOVE_HEAD(&sc->sc_ccb_queue, ccb, ccb_chain); 389 1.15.2.2 bouyer #ifdef DIAGNOSTIC 390 1.15.2.2 bouyer ccb->ccb_flags |= CAC_CCB_ACTIVE; 391 1.15.2.2 bouyer #endif 392 1.15.2.2 bouyer (*sc->sc_cl->cl_submit)(sc, ccb); 393 1.15.2.2 bouyer } 394 1.15.2.2 bouyer 395 1.15.2.2 bouyer return (0); 396 1.15.2.2 bouyer } 397 1.15.2.2 bouyer 398 1.15.2.2 bouyer /* 399 1.15.2.2 bouyer * Process a finished CCB. 400 1.15.2.2 bouyer */ 401 1.15.2.2 bouyer static void 402 1.15.2.2 bouyer cac_ccb_done(struct cac_softc *sc, struct cac_ccb *ccb) 403 1.15.2.2 bouyer { 404 1.15.2.2 bouyer const char *errdvn; 405 1.15.2.2 bouyer int error; 406 1.15.2.2 bouyer 407 1.15.2.2 bouyer error = 0; 408 1.15.2.2 bouyer 409 1.15.2.2 bouyer #ifdef DIAGNOSTIC 410 1.15.2.2 bouyer if ((ccb->ccb_flags & CAC_CCB_ACTIVE) == 0) 411 1.15.2.2 bouyer panic("cac_ccb_done: CCB not active"); 412 1.15.2.2 bouyer ccb->ccb_flags &= ~CAC_CCB_ACTIVE; 413 1.15.2.2 bouyer #endif 414 1.15.2.2 bouyer 415 1.15.2.2 bouyer if ((ccb->ccb_flags & (CAC_CCB_DATA_IN | CAC_CCB_DATA_OUT)) != 0) { 416 1.15.2.2 bouyer bus_dmamap_sync(sc->sc_dmat, ccb->ccb_dmamap_xfer, 0, 417 1.15.2.2 bouyer ccb->ccb_datasize, ccb->ccb_flags & CAC_CCB_DATA_IN ? 418 1.15.2.2 bouyer BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 419 1.15.2.2 bouyer bus_dmamap_unload(sc->sc_dmat, ccb->ccb_dmamap_xfer); 420 1.15.2.2 bouyer } 421 1.15.2.2 bouyer 422 1.15.2.2 bouyer if (ccb->ccb_context.cc_dv != NULL) 423 1.15.2.2 bouyer errdvn = ccb->ccb_context.cc_dv->dv_xname; 424 1.15.2.2 bouyer else 425 1.15.2.2 bouyer errdvn = sc->sc_dv.dv_xname; 426 1.15.2.2 bouyer 427 1.15.2.2 bouyer if ((ccb->ccb_req.error & CAC_RET_SOFT_ERROR) != 0) 428 1.15.2.2 bouyer printf("%s: soft error; corrected\n", errdvn); 429 1.15.2.2 bouyer if ((ccb->ccb_req.error & CAC_RET_HARD_ERROR) != 0) { 430 1.15.2.2 bouyer error = 1; 431 1.15.2.2 bouyer printf("%s: hard error\n", errdvn); 432 1.15.2.2 bouyer } 433 1.15.2.2 bouyer if ((ccb->ccb_req.error & CAC_RET_CMD_REJECTED) != 0) { 434 1.15.2.2 bouyer error = 1; 435 1.15.2.2 bouyer printf("%s: invalid request\n", errdvn); 436 1.15.2.2 bouyer } 437 1.15.2.2 bouyer 438 1.15.2.2 bouyer if (ccb->ccb_context.cc_handler != NULL) { 439 1.15.2.2 bouyer (*ccb->ccb_context.cc_handler)(ccb, error); 440 1.15.2.2 bouyer cac_ccb_free(sc, ccb); 441 1.15.2.2 bouyer } 442 1.15.2.2 bouyer } 443 1.15.2.2 bouyer 444 1.15.2.2 bouyer /* 445 1.15.2.2 bouyer * Allocate a CCB. 446 1.15.2.2 bouyer */ 447 1.15.2.2 bouyer struct cac_ccb * 448 1.15.2.2 bouyer cac_ccb_alloc(struct cac_softc *sc, int nosleep) 449 1.15.2.2 bouyer { 450 1.15.2.2 bouyer struct cac_ccb *ccb; 451 1.15.2.2 bouyer int s; 452 1.15.2.2 bouyer 453 1.15.2.2 bouyer s = splbio(); 454 1.15.2.2 bouyer 455 1.15.2.2 bouyer for (;;) { 456 1.15.2.2 bouyer if ((ccb = SIMPLEQ_FIRST(&sc->sc_ccb_free)) != NULL) { 457 1.15.2.2 bouyer SIMPLEQ_REMOVE_HEAD(&sc->sc_ccb_free, ccb, ccb_chain); 458 1.15.2.2 bouyer break; 459 1.15.2.2 bouyer } 460 1.15.2.2 bouyer if (nosleep) { 461 1.15.2.2 bouyer ccb = NULL; 462 1.15.2.2 bouyer break; 463 1.15.2.2 bouyer } 464 1.15.2.2 bouyer tsleep(&sc->sc_ccb_free, PRIBIO, "cacccb", 0); 465 1.15.2.2 bouyer } 466 1.15.2.2 bouyer 467 1.15.2.2 bouyer splx(s); 468 1.15.2.2 bouyer return (ccb); 469 1.15.2.2 bouyer } 470 1.15.2.2 bouyer 471 1.15.2.2 bouyer /* 472 1.15.2.2 bouyer * Put a CCB onto the freelist. 473 1.15.2.2 bouyer */ 474 1.15.2.2 bouyer void 475 1.15.2.2 bouyer cac_ccb_free(struct cac_softc *sc, struct cac_ccb *ccb) 476 1.15.2.2 bouyer { 477 1.15.2.2 bouyer int s; 478 1.15.2.2 bouyer 479 1.15.2.2 bouyer ccb->ccb_flags = 0; 480 1.15.2.2 bouyer s = splbio(); 481 1.15.2.2 bouyer SIMPLEQ_INSERT_HEAD(&sc->sc_ccb_free, ccb, ccb_chain); 482 1.15.2.2 bouyer if (SIMPLEQ_NEXT(ccb, ccb_chain) == NULL) 483 1.15.2.2 bouyer wakeup_one(&sc->sc_ccb_free); 484 1.15.2.2 bouyer splx(s); 485 1.15.2.2 bouyer } 486 1.15.2.2 bouyer 487 1.15.2.2 bouyer /* 488 1.15.2.2 bouyer * Board specific linkage shared between multiple bus types. 489 1.15.2.2 bouyer */ 490 1.15.2.2 bouyer 491 1.15.2.2 bouyer static int 492 1.15.2.2 bouyer cac_l0_fifo_full(struct cac_softc *sc) 493 1.15.2.2 bouyer { 494 1.15.2.2 bouyer 495 1.15.2.2 bouyer return (cac_inl(sc, CAC_REG_CMD_FIFO) == 0); 496 1.15.2.2 bouyer } 497 1.15.2.2 bouyer 498 1.15.2.2 bouyer static void 499 1.15.2.2 bouyer cac_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb) 500 1.15.2.2 bouyer { 501 1.15.2.2 bouyer 502 1.15.2.2 bouyer bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, (caddr_t)ccb - sc->sc_ccbs, 503 1.15.2.2 bouyer sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD); 504 1.15.2.2 bouyer cac_outl(sc, CAC_REG_CMD_FIFO, ccb->ccb_paddr); 505 1.15.2.2 bouyer } 506 1.15.2.2 bouyer 507 1.15.2.2 bouyer static struct cac_ccb * 508 1.15.2.2 bouyer cac_l0_completed(struct cac_softc *sc) 509 1.15.2.2 bouyer { 510 1.15.2.2 bouyer struct cac_ccb *ccb; 511 1.15.2.2 bouyer paddr_t off; 512 1.15.2.2 bouyer 513 1.15.2.2 bouyer off = (cac_inl(sc, CAC_REG_DONE_FIFO) & ~3) - sc->sc_ccbs_paddr; 514 1.15.2.2 bouyer ccb = (struct cac_ccb *)(sc->sc_ccbs + off); 515 1.15.2.2 bouyer 516 1.15.2.2 bouyer bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb), 517 1.15.2.2 bouyer BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD); 518 1.15.2.2 bouyer 519 1.15.2.2 bouyer return (ccb); 520 1.15.2.2 bouyer } 521 1.15.2.2 bouyer 522 1.15.2.2 bouyer static int 523 1.15.2.2 bouyer cac_l0_intr_pending(struct cac_softc *sc) 524 1.15.2.2 bouyer { 525 1.15.2.2 bouyer 526 1.15.2.2 bouyer return (cac_inl(sc, CAC_REG_INTR_PENDING)); 527 1.15.2.2 bouyer } 528 1.15.2.2 bouyer 529 1.15.2.2 bouyer static void 530 1.15.2.2 bouyer cac_l0_intr_enable(struct cac_softc *sc, int state) 531 1.15.2.2 bouyer { 532 1.15.2.2 bouyer 533 1.15.2.2 bouyer cac_outl(sc, CAC_REG_INTR_MASK, 534 1.15.2.2 bouyer state ? CAC_INTR_ENABLE : CAC_INTR_DISABLE); 535 1.15.2.2 bouyer } 536
Indexes created Wed Oct 22 06:10:02 GMT 2025