cac.c revision 1.15.2.4
1 1.15.2.4 bouyer /* $NetBSD: cac.c,v 1.15.2.4 2000/12/13 15:50:01 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 1.15.2.3 bouyer #include <uvm/uvm_extern.h> 55 1.15.2.3 bouyer 56 1.15.2.2 bouyer #include <machine/bswap.h> 57 1.15.2.2 bouyer #include <machine/bus.h> 58 1.15.2.2 bouyer 59 1.15.2.2 bouyer #include <dev/ic/cacreg.h> 60 1.15.2.2 bouyer #include <dev/ic/cacvar.h> 61 1.15.2.2 bouyer 62 1.15.2.2 bouyer static struct cac_ccb *cac_ccb_alloc(struct cac_softc *, int); 63 1.15.2.2 bouyer static void cac_ccb_done(struct cac_softc *, struct cac_ccb *); 64 1.15.2.2 bouyer static void cac_ccb_free(struct cac_softc *, struct cac_ccb *); 65 1.15.2.2 bouyer static int cac_ccb_poll(struct cac_softc *, struct cac_ccb *, int); 66 1.15.2.2 bouyer static int cac_ccb_start(struct cac_softc *, struct cac_ccb *); 67 1.15.2.2 bouyer static int cac_print(void *, const char *); 68 1.15.2.2 bouyer static void cac_shutdown(void *); 69 1.15.2.2 bouyer static int cac_submatch(struct device *, struct cfdata *, void *); 70 1.15.2.2 bouyer 71 1.15.2.2 bouyer static struct cac_ccb *cac_l0_completed(struct cac_softc *); 72 1.15.2.2 bouyer static int cac_l0_fifo_full(struct cac_softc *); 73 1.15.2.2 bouyer static void cac_l0_intr_enable(struct cac_softc *, int); 74 1.15.2.2 bouyer static int cac_l0_intr_pending(struct cac_softc *); 75 1.15.2.2 bouyer static void cac_l0_submit(struct cac_softc *, struct cac_ccb *); 76 1.15.2.2 bouyer 77 1.15.2.2 bouyer static void *cac_sdh; /* shutdown hook */ 78 1.15.2.2 bouyer 79 1.15.2.2 bouyer struct cac_linkage cac_l0 = { 80 1.15.2.2 bouyer cac_l0_completed, 81 1.15.2.2 bouyer cac_l0_fifo_full, 82 1.15.2.2 bouyer cac_l0_intr_enable, 83 1.15.2.2 bouyer cac_l0_intr_pending, 84 1.15.2.2 bouyer cac_l0_submit 85 1.15.2.2 bouyer }; 86 1.15.2.2 bouyer 87 1.15.2.2 bouyer /* 88 1.15.2.2 bouyer * Initialise our interface to the controller. 89 1.15.2.2 bouyer */ 90 1.15.2.2 bouyer int 91 1.15.2.2 bouyer cac_init(struct cac_softc *sc, const char *intrstr, int startfw) 92 1.15.2.2 bouyer { 93 1.15.2.2 bouyer struct cac_controller_info cinfo; 94 1.15.2.2 bouyer struct cac_attach_args caca; 95 1.15.2.2 bouyer int error, rseg, size, i; 96 1.15.2.2 bouyer bus_dma_segment_t seg; 97 1.15.2.2 bouyer struct cac_ccb *ccb; 98 1.15.2.2 bouyer 99 1.15.2.2 bouyer if (intrstr != NULL) 100 1.15.2.2 bouyer printf("%s: interrupting at %s\n", sc->sc_dv.dv_xname, 101 1.15.2.2 bouyer intrstr); 102 1.15.2.2 bouyer 103 1.15.2.2 bouyer SIMPLEQ_INIT(&sc->sc_ccb_free); 104 1.15.2.2 bouyer SIMPLEQ_INIT(&sc->sc_ccb_queue); 105 1.15.2.2 bouyer 106 1.15.2.2 bouyer size = sizeof(struct cac_ccb) * CAC_MAX_CCBS; 107 1.15.2.2 bouyer 108 1.15.2.3 bouyer if ((error = bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0, &seg, 1, 109 1.15.2.2 bouyer &rseg, BUS_DMA_NOWAIT)) != 0) { 110 1.15.2.2 bouyer printf("%s: unable to allocate CCBs, error = %d\n", 111 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 112 1.15.2.2 bouyer return (-1); 113 1.15.2.2 bouyer } 114 1.15.2.2 bouyer 115 1.15.2.2 bouyer if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, size, 116 1.15.2.2 bouyer (caddr_t *)&sc->sc_ccbs, 117 1.15.2.2 bouyer BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) { 118 1.15.2.2 bouyer printf("%s: unable to map CCBs, error = %d\n", 119 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 120 1.15.2.2 bouyer return (-1); 121 1.15.2.2 bouyer } 122 1.15.2.2 bouyer 123 1.15.2.2 bouyer if ((error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0, 124 1.15.2.2 bouyer BUS_DMA_NOWAIT, &sc->sc_dmamap)) != 0) { 125 1.15.2.2 bouyer printf("%s: unable to create CCB DMA map, error = %d\n", 126 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 127 1.15.2.2 bouyer return (-1); 128 1.15.2.2 bouyer } 129 1.15.2.2 bouyer 130 1.15.2.2 bouyer if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap, sc->sc_ccbs, 131 1.15.2.2 bouyer size, NULL, BUS_DMA_NOWAIT)) != 0) { 132 1.15.2.2 bouyer printf("%s: unable to load CCB DMA map, error = %d\n", 133 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 134 1.15.2.2 bouyer return (-1); 135 1.15.2.2 bouyer } 136 1.15.2.2 bouyer 137 1.15.2.2 bouyer sc->sc_ccbs_paddr = sc->sc_dmamap->dm_segs[0].ds_addr; 138 1.15.2.2 bouyer memset(sc->sc_ccbs, 0, size); 139 1.15.2.2 bouyer ccb = (struct cac_ccb *)sc->sc_ccbs; 140 1.15.2.2 bouyer 141 1.15.2.2 bouyer for (i = 0; i < CAC_MAX_CCBS; i++, ccb++) { 142 1.15.2.2 bouyer /* Create the DMA map for this CCB's data */ 143 1.15.2.2 bouyer error = bus_dmamap_create(sc->sc_dmat, CAC_MAX_XFER, 144 1.15.2.2 bouyer CAC_SG_SIZE, CAC_MAX_XFER, 0, 145 1.15.2.2 bouyer BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, 146 1.15.2.2 bouyer &ccb->ccb_dmamap_xfer); 147 1.15.2.2 bouyer 148 1.15.2.2 bouyer if (error) { 149 1.15.2.2 bouyer printf("%s: can't create ccb dmamap (%d)\n", 150 1.15.2.2 bouyer sc->sc_dv.dv_xname, error); 151 1.15.2.2 bouyer break; 152 1.15.2.2 bouyer } 153 1.15.2.2 bouyer 154 1.15.2.2 bouyer ccb->ccb_flags = 0; 155 1.15.2.2 bouyer ccb->ccb_paddr = sc->sc_ccbs_paddr + i * sizeof(struct cac_ccb); 156 1.15.2.2 bouyer SIMPLEQ_INSERT_TAIL(&sc->sc_ccb_free, ccb, ccb_chain); 157 1.15.2.2 bouyer } 158 1.15.2.2 bouyer 159 1.15.2.2 bouyer /* Start firmware background tasks, if needed. */ 160 1.15.2.2 bouyer if (startfw) { 161 1.15.2.2 bouyer if (cac_cmd(sc, CAC_CMD_START_FIRMWARE, &cinfo, sizeof(cinfo), 162 1.15.2.2 bouyer 0, 0, CAC_CCB_DATA_IN, NULL)) { 163 1.15.2.2 bouyer printf("%s: CAC_CMD_START_FIRMWARE failed\n", 164 1.15.2.2 bouyer sc->sc_dv.dv_xname); 165 1.15.2.2 bouyer return (-1); 166 1.15.2.2 bouyer } 167 1.15.2.2 bouyer } 168 1.15.2.2 bouyer 169 1.15.2.2 bouyer if (cac_cmd(sc, CAC_CMD_GET_CTRL_INFO, &cinfo, sizeof(cinfo), 0, 0, 170 1.15.2.2 bouyer CAC_CCB_DATA_IN, NULL)) { 171 1.15.2.2 bouyer printf("%s: CAC_CMD_GET_CTRL_INFO failed\n", 172 1.15.2.2 bouyer sc->sc_dv.dv_xname); 173 1.15.2.2 bouyer return (-1); 174 1.15.2.2 bouyer } 175 1.15.2.2 bouyer 176 1.15.2.3 bouyer sc->sc_nunits = cinfo.num_drvs; 177 1.15.2.2 bouyer for (i = 0; i < cinfo.num_drvs; i++) { 178 1.15.2.2 bouyer caca.caca_unit = i; 179 1.15.2.2 bouyer config_found_sm(&sc->sc_dv, &caca, cac_print, cac_submatch); 180 1.15.2.2 bouyer } 181 1.15.2.2 bouyer 182 1.15.2.2 bouyer /* Set our `shutdownhook' before we start any device activity. */ 183 1.15.2.2 bouyer if (cac_sdh == NULL) 184 1.15.2.2 bouyer cac_sdh = shutdownhook_establish(cac_shutdown, NULL); 185 1.15.2.2 bouyer 186 1.15.2.2 bouyer (*sc->sc_cl->cl_intr_enable)(sc, CAC_INTR_ENABLE); 187 1.15.2.2 bouyer return (0); 188 1.15.2.2 bouyer } 189 1.15.2.2 bouyer 190 1.15.2.2 bouyer /* 191 1.15.2.2 bouyer * Shut down all `cac' controllers. 192 1.15.2.2 bouyer */ 193 1.15.2.2 bouyer static void 194 1.15.2.2 bouyer cac_shutdown(void *cookie) 195 1.15.2.2 bouyer { 196 1.15.2.2 bouyer extern struct cfdriver cac_cd; 197 1.15.2.2 bouyer struct cac_softc *sc; 198 1.15.2.2 bouyer u_int8_t buf[512]; 199 1.15.2.2 bouyer int i; 200 1.15.2.2 bouyer 201 1.15.2.2 bouyer for (i = 0; i < cac_cd.cd_ndevs; i++) { 202 1.15.2.2 bouyer if ((sc = device_lookup(&cac_cd, i)) == NULL) 203 1.15.2.2 bouyer continue; 204 1.15.2.2 bouyer memset(buf, 0, sizeof(buf)); 205 1.15.2.2 bouyer buf[0] = 1; 206 1.15.2.2 bouyer cac_cmd(sc, CAC_CMD_FLUSH_CACHE, buf, sizeof(buf), 0, 0, 207 1.15.2.2 bouyer CAC_CCB_DATA_OUT, NULL); 208 1.15.2.2 bouyer } 209 1.15.2.2 bouyer } 210 1.15.2.2 bouyer 211 1.15.2.2 bouyer /* 212 1.15.2.2 bouyer * Print autoconfiguration message for a sub-device. 213 1.15.2.2 bouyer */ 214 1.15.2.2 bouyer static int 215 1.15.2.2 bouyer cac_print(void *aux, const char *pnp) 216 1.15.2.2 bouyer { 217 1.15.2.2 bouyer struct cac_attach_args *caca; 218 1.15.2.2 bouyer 219 1.15.2.2 bouyer caca = (struct cac_attach_args *)aux; 220 1.15.2.2 bouyer 221 1.15.2.2 bouyer if (pnp != NULL) 222 1.15.2.2 bouyer printf("block device at %s", pnp); 223 1.15.2.2 bouyer printf(" unit %d", caca->caca_unit); 224 1.15.2.2 bouyer return (UNCONF); 225 1.15.2.2 bouyer } 226 1.15.2.2 bouyer 227 1.15.2.2 bouyer /* 228 1.15.2.2 bouyer * Match a sub-device. 229 1.15.2.2 bouyer */ 230 1.15.2.2 bouyer static int 231 1.15.2.2 bouyer cac_submatch(struct device *parent, struct cfdata *cf, void *aux) 232 1.15.2.2 bouyer { 233 1.15.2.2 bouyer struct cac_attach_args *caca; 234 1.15.2.2 bouyer 235 1.15.2.2 bouyer caca = (struct cac_attach_args *)aux; 236 1.15.2.2 bouyer 237 1.15.2.2 bouyer if (cf->cacacf_unit != CACCF_UNIT_DEFAULT && 238 1.15.2.2 bouyer cf->cacacf_unit != caca->caca_unit) 239 1.15.2.2 bouyer return (0); 240 1.15.2.2 bouyer 241 1.15.2.2 bouyer return (cf->cf_attach->ca_match(parent, cf, aux)); 242 1.15.2.2 bouyer } 243 1.15.2.2 bouyer 244 1.15.2.2 bouyer /* 245 1.15.2.2 bouyer * Handle an interrupt from the controller: process finished CCBs and 246 1.15.2.2 bouyer * dequeue any waiting CCBs. 247 1.15.2.2 bouyer */ 248 1.15.2.2 bouyer int 249 1.15.2.2 bouyer cac_intr(void *cookie) 250 1.15.2.2 bouyer { 251 1.15.2.2 bouyer struct cac_softc *sc; 252 1.15.2.2 bouyer struct cac_ccb *ccb; 253 1.15.2.2 bouyer 254 1.15.2.2 bouyer sc = (struct cac_softc *)cookie; 255 1.15.2.2 bouyer 256 1.15.2.2 bouyer if (!(*sc->sc_cl->cl_intr_pending)(sc)) { 257 1.15.2.2 bouyer #ifdef DEBUG 258 1.15.2.2 bouyer printf("%s: spurious intr\n", sc->sc_dv.dv_xname); 259 1.15.2.2 bouyer #endif 260 1.15.2.2 bouyer return (0); 261 1.15.2.2 bouyer } 262 1.15.2.2 bouyer 263 1.15.2.2 bouyer while ((ccb = (*sc->sc_cl->cl_completed)(sc)) != NULL) { 264 1.15.2.2 bouyer cac_ccb_done(sc, ccb); 265 1.15.2.2 bouyer cac_ccb_start(sc, NULL); 266 1.15.2.2 bouyer } 267 1.15.2.2 bouyer 268 1.15.2.2 bouyer return (1); 269 1.15.2.2 bouyer } 270 1.15.2.2 bouyer 271 1.15.2.2 bouyer /* 272 1.15.2.2 bouyer * Execute a [polled] command. 273 1.15.2.2 bouyer */ 274 1.15.2.2 bouyer int 275 1.15.2.2 bouyer cac_cmd(struct cac_softc *sc, int command, void *data, int datasize, 276 1.15.2.2 bouyer int drive, int blkno, int flags, struct cac_context *context) 277 1.15.2.2 bouyer { 278 1.15.2.2 bouyer struct cac_ccb *ccb; 279 1.15.2.2 bouyer struct cac_sgb *sgb; 280 1.15.2.2 bouyer int s, i, rv, size, nsegs; 281 1.15.2.2 bouyer 282 1.15.2.2 bouyer size = 0; 283 1.15.2.2 bouyer 284 1.15.2.2 bouyer if ((ccb = cac_ccb_alloc(sc, 0)) == NULL) { 285 1.15.2.2 bouyer printf("%s: unable to alloc CCB", sc->sc_dv.dv_xname); 286 1.15.2.2 bouyer return (ENOMEM); 287 1.15.2.2 bouyer } 288 1.15.2.2 bouyer 289 1.15.2.2 bouyer if ((flags & (CAC_CCB_DATA_IN | CAC_CCB_DATA_OUT)) != 0) { 290 1.15.2.2 bouyer bus_dmamap_load(sc->sc_dmat, ccb->ccb_dmamap_xfer, 291 1.15.2.2 bouyer (void *)data, datasize, NULL, BUS_DMA_NOWAIT); 292 1.15.2.2 bouyer 293 1.15.2.2 bouyer bus_dmamap_sync(sc->sc_dmat, ccb->ccb_dmamap_xfer, 0, datasize, 294 1.15.2.2 bouyer (flags & CAC_CCB_DATA_IN) != 0 ? BUS_DMASYNC_PREREAD : 295 1.15.2.2 bouyer BUS_DMASYNC_PREWRITE); 296 1.15.2.2 bouyer 297 1.15.2.2 bouyer sgb = ccb->ccb_seg; 298 1.15.2.2 bouyer nsegs = min(ccb->ccb_dmamap_xfer->dm_nsegs, CAC_SG_SIZE); 299 1.15.2.2 bouyer 300 1.15.2.2 bouyer for (i = 0; i < nsegs; i++, sgb++) { 301 1.15.2.2 bouyer size += ccb->ccb_dmamap_xfer->dm_segs[i].ds_len; 302 1.15.2.2 bouyer sgb->length = 303 1.15.2.2 bouyer htole32(ccb->ccb_dmamap_xfer->dm_segs[i].ds_len); 304 1.15.2.2 bouyer sgb->addr = 305 1.15.2.2 bouyer htole32(ccb->ccb_dmamap_xfer->dm_segs[i].ds_addr); 306 1.15.2.2 bouyer } 307 1.15.2.2 bouyer } else { 308 1.15.2.2 bouyer size = datasize; 309 1.15.2.2 bouyer nsegs = 0; 310 1.15.2.2 bouyer } 311 1.15.2.2 bouyer 312 1.15.2.2 bouyer ccb->ccb_hdr.drive = drive; 313 1.15.2.2 bouyer ccb->ccb_hdr.size = htole16((sizeof(struct cac_req) + 314 1.15.2.2 bouyer sizeof(struct cac_sgb) * CAC_SG_SIZE) >> 2); 315 1.15.2.2 bouyer 316 1.15.2.2 bouyer ccb->ccb_req.bcount = htole16(howmany(size, DEV_BSIZE)); 317 1.15.2.2 bouyer ccb->ccb_req.command = command; 318 1.15.2.2 bouyer ccb->ccb_req.sgcount = nsegs; 319 1.15.2.2 bouyer ccb->ccb_req.blkno = htole32(blkno); 320 1.15.2.2 bouyer 321 1.15.2.2 bouyer ccb->ccb_flags = flags; 322 1.15.2.2 bouyer ccb->ccb_datasize = size; 323 1.15.2.2 bouyer 324 1.15.2.2 bouyer if (context == NULL) { 325 1.15.2.2 bouyer memset(&ccb->ccb_context, 0, sizeof(struct cac_context)); 326 1.15.2.2 bouyer s = splbio(); 327 1.15.2.2 bouyer 328 1.15.2.2 bouyer /* Synchronous commands musn't wait. */ 329 1.15.2.2 bouyer if ((*sc->sc_cl->cl_fifo_full)(sc)) { 330 1.15.2.2 bouyer cac_ccb_free(sc, ccb); 331 1.15.2.2 bouyer rv = -1; 332 1.15.2.2 bouyer } else { 333 1.15.2.2 bouyer #ifdef DIAGNOSTIC 334 1.15.2.2 bouyer ccb->ccb_flags |= CAC_CCB_ACTIVE; 335 1.15.2.2 bouyer #endif 336 1.15.2.2 bouyer (*sc->sc_cl->cl_submit)(sc, ccb); 337 1.15.2.2 bouyer rv = cac_ccb_poll(sc, ccb, 2000); 338 1.15.2.2 bouyer cac_ccb_free(sc, ccb); 339 1.15.2.2 bouyer } 340 1.15.2.2 bouyer } else { 341 1.15.2.2 bouyer memcpy(&ccb->ccb_context, context, sizeof(struct cac_context)); 342 1.15.2.2 bouyer s = splbio(); 343 1.15.2.2 bouyer rv = cac_ccb_start(sc, ccb); 344 1.15.2.2 bouyer } 345 1.15.2.2 bouyer 346 1.15.2.2 bouyer splx(s); 347 1.15.2.2 bouyer return (rv); 348 1.15.2.2 bouyer } 349 1.15.2.2 bouyer 350 1.15.2.2 bouyer /* 351 1.15.2.2 bouyer * Wait for the specified CCB to complete. Must be called at splbio. 352 1.15.2.2 bouyer */ 353 1.15.2.2 bouyer static int 354 1.15.2.2 bouyer cac_ccb_poll(struct cac_softc *sc, struct cac_ccb *wantccb, int timo) 355 1.15.2.2 bouyer { 356 1.15.2.2 bouyer struct cac_ccb *ccb; 357 1.15.2.2 bouyer 358 1.15.2.2 bouyer timo *= 10; 359 1.15.2.2 bouyer 360 1.15.2.2 bouyer do { 361 1.15.2.2 bouyer for (; timo != 0; timo--) { 362 1.15.2.2 bouyer if ((ccb = (*sc->sc_cl->cl_completed)(sc)) != NULL) 363 1.15.2.2 bouyer break; 364 1.15.2.2 bouyer DELAY(100); 365 1.15.2.2 bouyer } 366 1.15.2.2 bouyer 367 1.15.2.2 bouyer if (timo == 0) { 368 1.15.2.2 bouyer printf("%s: timeout", sc->sc_dv.dv_xname); 369 1.15.2.2 bouyer return (EBUSY); 370 1.15.2.2 bouyer } 371 1.15.2.2 bouyer cac_ccb_done(sc, ccb); 372 1.15.2.2 bouyer } while (ccb != wantccb); 373 1.15.2.2 bouyer 374 1.15.2.2 bouyer return (0); 375 1.15.2.2 bouyer } 376 1.15.2.2 bouyer 377 1.15.2.2 bouyer /* 378 1.15.2.2 bouyer * Enqueue the specifed command (if any) and attempt to start all enqueued 379 1.15.2.2 bouyer * commands. Must be called at splbio. 380 1.15.2.2 bouyer */ 381 1.15.2.2 bouyer static int 382 1.15.2.2 bouyer cac_ccb_start(struct cac_softc *sc, struct cac_ccb *ccb) 383 1.15.2.2 bouyer { 384 1.15.2.2 bouyer 385 1.15.2.2 bouyer if (ccb != NULL) 386 1.15.2.2 bouyer SIMPLEQ_INSERT_TAIL(&sc->sc_ccb_queue, ccb, ccb_chain); 387 1.15.2.2 bouyer 388 1.15.2.2 bouyer while ((ccb = SIMPLEQ_FIRST(&sc->sc_ccb_queue)) != NULL) { 389 1.15.2.2 bouyer if ((*sc->sc_cl->cl_fifo_full)(sc)) 390 1.15.2.2 bouyer return (EBUSY); 391 1.15.2.2 bouyer SIMPLEQ_REMOVE_HEAD(&sc->sc_ccb_queue, ccb, ccb_chain); 392 1.15.2.2 bouyer #ifdef DIAGNOSTIC 393 1.15.2.2 bouyer ccb->ccb_flags |= CAC_CCB_ACTIVE; 394 1.15.2.2 bouyer #endif 395 1.15.2.2 bouyer (*sc->sc_cl->cl_submit)(sc, ccb); 396 1.15.2.2 bouyer } 397 1.15.2.2 bouyer 398 1.15.2.2 bouyer return (0); 399 1.15.2.2 bouyer } 400 1.15.2.2 bouyer 401 1.15.2.2 bouyer /* 402 1.15.2.2 bouyer * Process a finished CCB. 403 1.15.2.2 bouyer */ 404 1.15.2.2 bouyer static void 405 1.15.2.2 bouyer cac_ccb_done(struct cac_softc *sc, struct cac_ccb *ccb) 406 1.15.2.2 bouyer { 407 1.15.2.3 bouyer struct device *dv; 408 1.15.2.3 bouyer void *context; 409 1.15.2.2 bouyer int error; 410 1.15.2.2 bouyer 411 1.15.2.2 bouyer error = 0; 412 1.15.2.2 bouyer 413 1.15.2.2 bouyer #ifdef DIAGNOSTIC 414 1.15.2.2 bouyer if ((ccb->ccb_flags & CAC_CCB_ACTIVE) == 0) 415 1.15.2.2 bouyer panic("cac_ccb_done: CCB not active"); 416 1.15.2.2 bouyer ccb->ccb_flags &= ~CAC_CCB_ACTIVE; 417 1.15.2.2 bouyer #endif 418 1.15.2.2 bouyer 419 1.15.2.2 bouyer if ((ccb->ccb_flags & (CAC_CCB_DATA_IN | CAC_CCB_DATA_OUT)) != 0) { 420 1.15.2.2 bouyer bus_dmamap_sync(sc->sc_dmat, ccb->ccb_dmamap_xfer, 0, 421 1.15.2.2 bouyer ccb->ccb_datasize, ccb->ccb_flags & CAC_CCB_DATA_IN ? 422 1.15.2.2 bouyer BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 423 1.15.2.2 bouyer bus_dmamap_unload(sc->sc_dmat, ccb->ccb_dmamap_xfer); 424 1.15.2.2 bouyer } 425 1.15.2.2 bouyer 426 1.15.2.4 bouyer error = ccb->ccb_req.error; 427 1.15.2.2 bouyer if (ccb->ccb_context.cc_handler != NULL) { 428 1.15.2.3 bouyer dv = ccb->ccb_context.cc_dv; 429 1.15.2.3 bouyer context = ccb->ccb_context.cc_context; 430 1.15.2.2 bouyer cac_ccb_free(sc, ccb); 431 1.15.2.3 bouyer (*ccb->ccb_context.cc_handler)(dv, context, error); 432 1.15.2.4 bouyer } else { 433 1.15.2.4 bouyer if ((error & CAC_RET_SOFT_ERROR) != 0) 434 1.15.2.4 bouyer printf("%s: soft error; array may be degraded\n", 435 1.15.2.4 bouyer sc->sc_dv.dv_xname); 436 1.15.2.4 bouyer if ((error & CAC_RET_HARD_ERROR) != 0) 437 1.15.2.4 bouyer printf("%s: hard error\n", sc->sc_dv.dv_xname); 438 1.15.2.4 bouyer if ((error & CAC_RET_CMD_REJECTED) != 0) { 439 1.15.2.4 bouyer error = 1; 440 1.15.2.4 bouyer printf("%s: invalid request\n", sc->sc_dv.dv_xname); 441 1.15.2.4 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 /* 446 1.15.2.2 bouyer * Allocate a CCB. 447 1.15.2.2 bouyer */ 448 1.15.2.2 bouyer struct cac_ccb * 449 1.15.2.2 bouyer cac_ccb_alloc(struct cac_softc *sc, int nosleep) 450 1.15.2.2 bouyer { 451 1.15.2.2 bouyer struct cac_ccb *ccb; 452 1.15.2.2 bouyer int s; 453 1.15.2.2 bouyer 454 1.15.2.2 bouyer s = splbio(); 455 1.15.2.2 bouyer 456 1.15.2.2 bouyer for (;;) { 457 1.15.2.2 bouyer if ((ccb = SIMPLEQ_FIRST(&sc->sc_ccb_free)) != NULL) { 458 1.15.2.2 bouyer SIMPLEQ_REMOVE_HEAD(&sc->sc_ccb_free, ccb, ccb_chain); 459 1.15.2.2 bouyer break; 460 1.15.2.2 bouyer } 461 1.15.2.2 bouyer if (nosleep) { 462 1.15.2.2 bouyer ccb = NULL; 463 1.15.2.2 bouyer break; 464 1.15.2.2 bouyer } 465 1.15.2.2 bouyer tsleep(&sc->sc_ccb_free, PRIBIO, "cacccb", 0); 466 1.15.2.2 bouyer } 467 1.15.2.2 bouyer 468 1.15.2.2 bouyer splx(s); 469 1.15.2.2 bouyer return (ccb); 470 1.15.2.2 bouyer } 471 1.15.2.2 bouyer 472 1.15.2.2 bouyer /* 473 1.15.2.2 bouyer * Put a CCB onto the freelist. 474 1.15.2.2 bouyer */ 475 1.15.2.2 bouyer void 476 1.15.2.2 bouyer cac_ccb_free(struct cac_softc *sc, struct cac_ccb *ccb) 477 1.15.2.2 bouyer { 478 1.15.2.2 bouyer int s; 479 1.15.2.2 bouyer 480 1.15.2.2 bouyer ccb->ccb_flags = 0; 481 1.15.2.2 bouyer s = splbio(); 482 1.15.2.2 bouyer SIMPLEQ_INSERT_HEAD(&sc->sc_ccb_free, ccb, ccb_chain); 483 1.15.2.2 bouyer if (SIMPLEQ_NEXT(ccb, ccb_chain) == NULL) 484 1.15.2.2 bouyer wakeup_one(&sc->sc_ccb_free); 485 1.15.2.2 bouyer splx(s); 486 1.15.2.2 bouyer } 487 1.15.2.2 bouyer 488 1.15.2.2 bouyer /* 489 1.15.2.2 bouyer * Board specific linkage shared between multiple bus types. 490 1.15.2.2 bouyer */ 491 1.15.2.2 bouyer 492 1.15.2.2 bouyer static int 493 1.15.2.2 bouyer cac_l0_fifo_full(struct cac_softc *sc) 494 1.15.2.2 bouyer { 495 1.15.2.2 bouyer 496 1.15.2.2 bouyer return (cac_inl(sc, CAC_REG_CMD_FIFO) == 0); 497 1.15.2.2 bouyer } 498 1.15.2.2 bouyer 499 1.15.2.2 bouyer static void 500 1.15.2.2 bouyer cac_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb) 501 1.15.2.2 bouyer { 502 1.15.2.2 bouyer 503 1.15.2.2 bouyer bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, (caddr_t)ccb - sc->sc_ccbs, 504 1.15.2.2 bouyer sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD); 505 1.15.2.2 bouyer cac_outl(sc, CAC_REG_CMD_FIFO, ccb->ccb_paddr); 506 1.15.2.2 bouyer } 507 1.15.2.2 bouyer 508 1.15.2.2 bouyer static struct cac_ccb * 509 1.15.2.2 bouyer cac_l0_completed(struct cac_softc *sc) 510 1.15.2.2 bouyer { 511 1.15.2.2 bouyer struct cac_ccb *ccb; 512 1.15.2.2 bouyer paddr_t off; 513 1.15.2.2 bouyer 514 1.15.2.2 bouyer off = (cac_inl(sc, CAC_REG_DONE_FIFO) & ~3) - sc->sc_ccbs_paddr; 515 1.15.2.2 bouyer ccb = (struct cac_ccb *)(sc->sc_ccbs + off); 516 1.15.2.2 bouyer 517 1.15.2.2 bouyer bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb), 518 1.15.2.2 bouyer BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD); 519 1.15.2.2 bouyer 520 1.15.2.2 bouyer return (ccb); 521 1.15.2.2 bouyer } 522 1.15.2.2 bouyer 523 1.15.2.2 bouyer static int 524 1.15.2.2 bouyer cac_l0_intr_pending(struct cac_softc *sc) 525 1.15.2.2 bouyer { 526 1.15.2.2 bouyer 527 1.15.2.2 bouyer return (cac_inl(sc, CAC_REG_INTR_PENDING)); 528 1.15.2.2 bouyer } 529 1.15.2.2 bouyer 530 1.15.2.2 bouyer static void 531 1.15.2.2 bouyer cac_l0_intr_enable(struct cac_softc *sc, int state) 532 1.15.2.2 bouyer { 533 1.15.2.2 bouyer 534 1.15.2.2 bouyer cac_outl(sc, CAC_REG_INTR_MASK, 535 1.15.2.2 bouyer state ? CAC_INTR_ENABLE : CAC_INTR_DISABLE); 536 1.15.2.2 bouyer } 537
Indexes created Mon Oct 20 20:10:13 GMT 2025