2 * Copyright (c) 1999,2000 Jonathan Lemon
5 # Derived from the original IDA Compaq RAID driver, which is
6 * Copyright (c) 1996, 1997, 1998, 1999
7 * Mark Dawson and David James. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
35 * Generic driver for Compaq SMART RAID adapters.
37 * Specific probe routines are in:
39 * i386/eisa/ida_eisa.c
42 #include <sys/param.h>
43 #include <sys/kernel.h>
44 #include <sys/systm.h>
45 #include <sys/malloc.h>
51 #include <machine/bus_memio.h>
52 #include <machine/bus_pio.h>
53 #include <machine/bus.h>
56 #include <geom/geom_disk.h>
58 #include <dev/ida/idareg.h>
59 #include <dev/ida/idavar.h>
62 static void ida_alloc_qcb(struct ida_softc *ida);
63 static void ida_construct_qcb(struct ida_softc *ida);
64 static void ida_start(struct ida_softc *ida);
65 static void ida_done(struct ida_softc *ida, struct ida_qcb *qcb);
66 static int ida_wait(struct ida_softc *ida, struct ida_qcb *qcb);
69 ida_free(struct ida_softc *ida)
73 for (i = 0; i < ida->num_qcbs; i++)
74 bus_dmamap_destroy(ida->buffer_dmat, ida->qcbs[i].dmamap);
76 if (ida->hwqcb_busaddr)
77 bus_dmamap_unload(ida->hwqcb_dmat, ida->hwqcb_dmamap);
80 bus_dmamem_free(ida->hwqcb_dmat, ida->hwqcbs,
84 bus_dma_tag_destroy(ida->buffer_dmat);
87 bus_dma_tag_destroy(ida->hwqcb_dmat);
89 if (ida->qcbs != NULL)
90 free(ida->qcbs, M_DEVBUF);
93 bus_teardown_intr(ida->dev, ida->irq, ida->ih);
96 bus_release_resource(ida->dev, ida->irq_res_type,
99 if (ida->parent_dmat != NULL)
100 bus_dma_tag_destroy(ida->parent_dmat);
102 if (ida->regs != NULL)
103 bus_release_resource(ida->dev, ida->regs_res_type,
104 ida->regs_res_id, ida->regs);
108 * record bus address from bus_dmamap_load
111 ida_dma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
115 baddr = (bus_addr_t *)arg;
116 *baddr = segs->ds_addr;
119 static __inline struct ida_qcb *
120 ida_get_qcb(struct ida_softc *ida)
124 if ((qcb = SLIST_FIRST(&ida->free_qcbs)) != NULL) {
125 SLIST_REMOVE_HEAD(&ida->free_qcbs, link.sle);
128 if ((qcb = SLIST_FIRST(&ida->free_qcbs)) != NULL)
129 SLIST_REMOVE_HEAD(&ida->free_qcbs, link.sle);
134 static __inline bus_addr_t
135 idahwqcbvtop(struct ida_softc *ida, struct ida_hardware_qcb *hwqcb)
137 return (ida->hwqcb_busaddr +
138 ((bus_addr_t)hwqcb - (bus_addr_t)ida->hwqcbs));
141 static __inline struct ida_qcb *
142 idahwqcbptov(struct ida_softc *ida, bus_addr_t hwqcb_addr)
144 struct ida_hardware_qcb *hwqcb;
146 hwqcb = (struct ida_hardware_qcb *)
147 ((bus_addr_t)ida->hwqcbs + (hwqcb_addr - ida->hwqcb_busaddr));
153 * since we allocate all QCB space up front during initialization, then
154 * why bother with this routine?
157 ida_alloc_qcb(struct ida_softc *ida)
162 if (ida->num_qcbs >= IDA_QCB_MAX)
165 qcb = &ida->qcbs[ida->num_qcbs];
167 error = bus_dmamap_create(ida->buffer_dmat, /*flags*/0, &qcb->dmamap);
171 qcb->flags = QCB_FREE;
172 qcb->hwqcb = &ida->hwqcbs[ida->num_qcbs];
173 qcb->hwqcb->qcb = qcb;
174 qcb->hwqcb_busaddr = idahwqcbvtop(ida, qcb->hwqcb);
175 SLIST_INSERT_HEAD(&ida->free_qcbs, qcb, link.sle);
180 ida_init(struct ida_softc *ida)
184 ida->unit = device_get_unit(ida->dev);
185 ida->tag = rman_get_bustag(ida->regs);
186 ida->bsh = rman_get_bushandle(ida->regs);
188 SLIST_INIT(&ida->free_qcbs);
189 STAILQ_INIT(&ida->qcb_queue);
190 bioq_init(&ida->bio_queue);
192 ida->qcbs = (struct ida_qcb *)
193 malloc(IDA_QCB_MAX * sizeof(struct ida_qcb), M_DEVBUF,
195 if (ida->qcbs == NULL)
199 * Create our DMA tags
202 /* DMA tag for our hardware QCB structures */
203 error = bus_dma_tag_create(ida->parent_dmat,
204 /*alignment*/1, /*boundary*/0,
205 /*lowaddr*/BUS_SPACE_MAXADDR, /*highaddr*/BUS_SPACE_MAXADDR,
206 /*filter*/NULL, /*filterarg*/NULL,
207 IDA_QCB_MAX * sizeof(struct ida_hardware_qcb),
208 /*nsegments*/1, /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
209 /*flags*/0, /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant,
214 /* DMA tag for mapping buffers into device space */
215 error = bus_dma_tag_create(ida->parent_dmat,
216 /*alignment*/1, /*boundary*/0,
217 /*lowaddr*/BUS_SPACE_MAXADDR, /*highaddr*/BUS_SPACE_MAXADDR,
218 /*filter*/NULL, /*filterarg*/NULL,
219 /*maxsize*/MAXBSIZE, /*nsegments*/IDA_NSEG,
220 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, /*flags*/0,
221 /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant, &ida->buffer_dmat);
225 /* Allocation of hardware QCBs */
226 /* XXX allocation is rounded to hardware page size */
227 error = bus_dmamem_alloc(ida->hwqcb_dmat,
228 (void **)&ida->hwqcbs, BUS_DMA_NOWAIT, &ida->hwqcb_dmamap);
232 /* And permanently map them in */
233 bus_dmamap_load(ida->hwqcb_dmat, ida->hwqcb_dmamap,
234 ida->hwqcbs, IDA_QCB_MAX * sizeof(struct ida_hardware_qcb),
235 ida_dma_map_cb, &ida->hwqcb_busaddr, /*flags*/0);
237 bzero(ida->hwqcbs, IDA_QCB_MAX * sizeof(struct ida_hardware_qcb));
239 ida_alloc_qcb(ida); /* allocate an initial qcb */
245 ida_attach(struct ida_softc *ida)
247 struct ida_controller_info cinfo;
250 ida->cmd.int_enable(ida, 0);
252 error = ida_command(ida, CMD_GET_CTRL_INFO, &cinfo, sizeof(cinfo),
253 IDA_CONTROLLER, 0, DMA_DATA_IN);
255 device_printf(ida->dev, "CMD_GET_CTRL_INFO failed.\n");
259 device_printf(ida->dev, "drives=%d firm_rev=%c%c%c%c\n",
260 cinfo.num_drvs, cinfo.firm_rev[0], cinfo.firm_rev[1],
261 cinfo.firm_rev[2], cinfo.firm_rev[3]);
263 if (ida->flags & IDA_FIRMWARE) {
266 error = ida_command(ida, CMD_START_FIRMWARE,
267 &data, sizeof(data), IDA_CONTROLLER, 0, DMA_DATA_IN);
269 device_printf(ida->dev, "CMD_START_FIRMWARE failed.\n");
275 for (i = 0; i < cinfo.num_drvs; i++)
276 device_add_child(ida->dev, /*"idad"*/NULL, -1);
278 bus_generic_attach(ida->dev);
280 ida->cmd.int_enable(ida, 1);
284 ida_detach(device_t dev)
286 struct ida_softc *ida;
289 ida = (struct ida_softc *)device_get_softc(dev);
293 * before detaching, we must make sure that the system is
294 * quiescent; nothing mounted, no pending activity.
299 * now, how are we supposed to maintain a list of our drives?
300 * iterate over our "child devices"?
309 ida_setup_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
311 struct ida_hardware_qcb *hwqcb = (struct ida_hardware_qcb *)arg;
314 hwqcb->hdr.size = (sizeof(struct ida_req) +
315 sizeof(struct ida_sgb) * IDA_NSEG) >> 2;
317 for (i = 0; i < nsegments; i++) {
318 hwqcb->seg[i].addr = segs[i].ds_addr;
319 hwqcb->seg[i].length = segs[i].ds_len;
321 hwqcb->req.sgcount = nsegments;
325 ida_command(struct ida_softc *ida, int command, void *data, int datasize,
326 int drive, u_int32_t pblkno, int flags)
328 struct ida_hardware_qcb *hwqcb;
334 qcb = ida_get_qcb(ida);
338 printf("ida_command: out of QCBs");
343 bzero(hwqcb, sizeof(struct ida_hdr) + sizeof(struct ida_req));
345 bus_dmamap_load(ida->buffer_dmat, qcb->dmamap,
346 (void *)data, datasize, ida_setup_dmamap, hwqcb, 0);
347 op = qcb->flags & DMA_DATA_IN ?
348 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE;
349 bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op);
351 hwqcb->hdr.drive = drive;
352 hwqcb->req.blkno = pblkno;
353 hwqcb->req.bcount = howmany(datasize, DEV_BSIZE);
354 hwqcb->req.command = command;
356 qcb->flags = flags | IDA_COMMAND;
359 STAILQ_INSERT_TAIL(&ida->qcb_queue, qcb, link.stqe);
361 error = ida_wait(ida, qcb);
364 /* XXX should have status returned here? */
365 /* XXX have "status pointer" area in QCB? */
371 ida_submit_buf(struct ida_softc *ida, struct bio *bp)
373 bioq_insert_tail(&ida->bio_queue, bp);
374 ida_construct_qcb(ida);
379 ida_construct_qcb(struct ida_softc *ida)
381 struct ida_hardware_qcb *hwqcb;
386 bp = bioq_first(&ida->bio_queue);
388 return; /* no more buffers */
390 qcb = ida_get_qcb(ida);
392 return; /* out of resources */
394 bioq_remove(&ida->bio_queue, bp);
399 bzero(hwqcb, sizeof(struct ida_hdr) + sizeof(struct ida_req));
401 bus_dmamap_load(ida->buffer_dmat, qcb->dmamap,
402 (void *)bp->bio_data, bp->bio_bcount, ida_setup_dmamap, hwqcb, 0);
403 op = qcb->flags & DMA_DATA_IN ?
404 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE;
405 bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op);
408 struct idad_softc *drv = (struct idad_softc *)bp->bio_driver1;
409 hwqcb->hdr.drive = drv->drive;
412 hwqcb->req.blkno = bp->bio_pblkno;
413 hwqcb->req.bcount = howmany(bp->bio_bcount, DEV_BSIZE);
414 hwqcb->req.command = bp->bio_cmd == BIO_READ ? CMD_READ : CMD_WRITE;
416 STAILQ_INSERT_TAIL(&ida->qcb_queue, qcb, link.stqe);
420 * This routine will be called from ida_intr in order to queue up more
421 * I/O, meaning that we may be in an interrupt context. Hence, we should
422 * not muck around with spl() in this routine.
425 ida_start(struct ida_softc *ida)
429 while ((qcb = STAILQ_FIRST(&ida->qcb_queue)) != NULL) {
430 if (ida->cmd.fifo_full(ida))
432 STAILQ_REMOVE_HEAD(&ida->qcb_queue, link.stqe);
435 * place the qcb on an active list and set a timeout?
437 qcb->state = QCB_ACTIVE;
438 ida->cmd.submit(ida, qcb);
443 ida_wait(struct ida_softc *ida, struct ida_qcb *qcb)
445 struct ida_qcb *qcb_done = NULL;
446 bus_addr_t completed;
449 if (ida->flags & IDA_INTERRUPTS) {
450 if (tsleep(qcb, PRIBIO, "idacmd", 5 * hz))
456 delay = 5 * 1000 * 100; /* 5 sec delay */
457 while ((completed = ida->cmd.done(ida)) == 0) {
463 qcb_done = idahwqcbptov(ida, completed & ~3);
473 struct ida_softc *ida;
475 bus_addr_t completed;
477 ida = (struct ida_softc *)data;
479 if (ida->cmd.int_pending(ida) == 0)
480 return; /* not our interrupt */
482 while ((completed = ida->cmd.done(ida)) != 0) {
483 qcb = idahwqcbptov(ida, completed & ~3);
485 if (qcb == NULL || qcb->state != QCB_ACTIVE) {
486 device_printf(ida->dev,
487 "ignoring completion %jx\n", (intmax_t)completed);
496 * should switch out command type; may be status, not just I/O.
499 ida_done(struct ida_softc *ida, struct ida_qcb *qcb)
506 if (qcb->flags & DMA_DATA_TRANSFER) {
509 op = qcb->flags & DMA_DATA_IN ?
510 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE;
511 bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op);
512 bus_dmamap_unload(ida->buffer_dmat, qcb->dmamap);
515 if (qcb->hwqcb->req.error & SOFT_ERROR)
516 device_printf(ida->dev, "soft error\n");
517 if (qcb->hwqcb->req.error & HARD_ERROR) {
519 device_printf(ida->dev, "hard error\n");
521 if (qcb->hwqcb->req.error & CMD_REJECTED) {
523 device_printf(ida->dev, "invalid request\n");
526 if (qcb->flags & IDA_COMMAND) {
527 if (ida->flags & IDA_INTERRUPTS)
531 qcb->buf->bio_flags |= BIO_ERROR;
535 qcb->state = QCB_FREE;
536 SLIST_INSERT_HEAD(&ida->free_qcbs, qcb, link.sle);
537 ida_construct_qcb(ida);