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
30 * $FreeBSD: src/sys/dev/ida/ida.c,v 1.7.2.3 2001/03/01 01:57:32 ps Exp $
31 * $DragonFly: src/sys/dev/raid/ida/ida.c,v 1.17 2008/06/10 17:20:50 dillon Exp $
35 * Generic driver for Compaq SMART RAID adapters.
37 * Specific probe routines are in:
39 * i386/eisa/ida_eisa.c
44 #include <sys/param.h>
45 #include <sys/kernel.h>
46 #include <sys/systm.h>
47 #include <sys/malloc.h>
48 #include <sys/kernel.h>
52 #include <sys/devicestat.h>
56 #include <sys/thread2.h>
58 #include <machine/clock.h>
64 static void ida_alloc_qcb(struct ida_softc *ida);
65 static void ida_construct_qcb(struct ida_softc *ida);
66 static void ida_start(struct ida_softc *ida);
67 static void ida_done(struct ida_softc *ida, struct ida_qcb *qcb);
68 static int ida_wait(struct ida_softc *ida, struct ida_qcb *qcb);
70 DECLARE_DUMMY_MODULE(ida);
73 ida_free(struct ida_softc *ida)
77 for (i = 0; i < ida->num_qcbs; i++)
78 bus_dmamap_destroy(ida->buffer_dmat, ida->qcbs[i].dmamap);
80 if (ida->hwqcb_busaddr)
81 bus_dmamap_unload(ida->hwqcb_dmat, ida->hwqcb_dmamap);
84 bus_dmamem_free(ida->hwqcb_dmat, ida->hwqcbs,
88 bus_dma_tag_destroy(ida->buffer_dmat);
91 bus_dma_tag_destroy(ida->hwqcb_dmat);
93 if (ida->qcbs != NULL)
94 kfree(ida->qcbs, M_DEVBUF);
97 bus_teardown_intr(ida->dev, ida->irq, ida->ih);
100 bus_release_resource(ida->dev, ida->irq_res_type,
103 if (ida->parent_dmat != NULL)
104 bus_dma_tag_destroy(ida->parent_dmat);
106 if (ida->regs != NULL)
107 bus_release_resource(ida->dev, ida->regs_res_type,
108 ida->regs_res_id, ida->regs);
112 * record bus address from bus_dmamap_load
115 ida_dma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
119 baddr = (bus_addr_t *)arg;
120 *baddr = segs->ds_addr;
123 static __inline struct ida_qcb *
124 ida_get_qcb(struct ida_softc *ida)
128 if ((qcb = SLIST_FIRST(&ida->free_qcbs)) != NULL) {
129 SLIST_REMOVE_HEAD(&ida->free_qcbs, link.sle);
132 if ((qcb = SLIST_FIRST(&ida->free_qcbs)) != NULL)
133 SLIST_REMOVE_HEAD(&ida->free_qcbs, link.sle);
138 static __inline bus_addr_t
139 idahwqcbvtop(struct ida_softc *ida, struct ida_hardware_qcb *hwqcb)
141 return (ida->hwqcb_busaddr +
142 ((bus_addr_t)hwqcb - (bus_addr_t)ida->hwqcbs));
145 static __inline struct ida_qcb *
146 idahwqcbptov(struct ida_softc *ida, bus_addr_t hwqcb_addr)
148 struct ida_hardware_qcb *hwqcb;
150 hwqcb = (struct ida_hardware_qcb *)
151 ((bus_addr_t)ida->hwqcbs + (hwqcb_addr - ida->hwqcb_busaddr));
157 * since we allocate all QCB space up front during initialization, then
158 * why bother with this routine?
161 ida_alloc_qcb(struct ida_softc *ida)
166 if (ida->num_qcbs >= IDA_QCB_MAX)
169 qcb = &ida->qcbs[ida->num_qcbs];
171 error = bus_dmamap_create(ida->buffer_dmat, /*flags*/0, &qcb->dmamap);
175 qcb->flags = QCB_FREE;
176 qcb->hwqcb = &ida->hwqcbs[ida->num_qcbs];
177 qcb->hwqcb->qcb = qcb;
178 qcb->hwqcb_busaddr = idahwqcbvtop(ida, qcb->hwqcb);
179 SLIST_INSERT_HEAD(&ida->free_qcbs, qcb, link.sle);
184 ida_init(struct ida_softc *ida)
188 ida->unit = device_get_unit(ida->dev);
189 ida->tag = rman_get_bustag(ida->regs);
190 ida->bsh = rman_get_bushandle(ida->regs);
192 SLIST_INIT(&ida->free_qcbs);
193 STAILQ_INIT(&ida->qcb_queue);
194 bioq_init(&ida->bio_queue);
196 ida->qcbs = kmalloc(IDA_QCB_MAX * sizeof(struct ida_qcb),
197 M_DEVBUF, M_INTWAIT|M_ZERO);
200 * Create our DMA tags
203 /* DMA tag for our hardware QCB structures */
204 error = bus_dma_tag_create(ida->parent_dmat,
205 /*alignment*/1, /*boundary*/0,
206 /*lowaddr*/BUS_SPACE_MAXADDR, /*highaddr*/BUS_SPACE_MAXADDR,
207 /*filter*/NULL, /*filterarg*/NULL,
208 IDA_QCB_MAX * sizeof(struct ida_hardware_qcb),
209 /*nsegments*/1, /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
210 /*flags*/0, &ida->hwqcb_dmat);
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, &ida->buffer_dmat);
224 /* Allocation of hardware QCBs */
225 /* XXX allocation is rounded to hardware page size */
226 error = bus_dmamem_alloc(ida->hwqcb_dmat,
227 (void **)&ida->hwqcbs, BUS_DMA_NOWAIT, &ida->hwqcb_dmamap);
231 /* And permanently map them in */
232 bus_dmamap_load(ida->hwqcb_dmat, ida->hwqcb_dmamap,
233 ida->hwqcbs, IDA_QCB_MAX * sizeof(struct ida_hardware_qcb),
234 ida_dma_map_cb, &ida->hwqcb_busaddr, /*flags*/0);
236 bzero(ida->hwqcbs, IDA_QCB_MAX * sizeof(struct ida_hardware_qcb));
238 ida_alloc_qcb(ida); /* allocate an initial qcb */
244 ida_attach(struct ida_softc *ida)
246 struct ida_controller_info cinfo;
249 ida->cmd.int_enable(ida, 0);
251 error = ida_command(ida, CMD_GET_CTRL_INFO, &cinfo, sizeof(cinfo),
252 IDA_CONTROLLER, 0, DMA_DATA_IN);
254 device_printf(ida->dev, "CMD_GET_CTRL_INFO failed.\n");
258 device_printf(ida->dev, "drives=%d firm_rev=%c%c%c%c\n",
259 cinfo.num_drvs, cinfo.firm_rev[0], cinfo.firm_rev[1],
260 cinfo.firm_rev[2], cinfo.firm_rev[3]);
262 if (ida->flags & IDA_FIRMWARE) {
265 error = ida_command(ida, CMD_START_FIRMWARE,
266 &data, sizeof(data), IDA_CONTROLLER, 0, DMA_DATA_IN);
268 device_printf(ida->dev, "CMD_START_FIRMWARE failed.\n");
274 for (i = 0; i < cinfo.num_drvs; i++)
275 device_add_child(ida->dev, /*"idad"*/NULL, -1);
277 bus_generic_attach(ida->dev);
279 ida->cmd.int_enable(ida, 1);
283 ida_detach(device_t dev)
285 struct ida_softc *ida;
288 ida = (struct ida_softc *)device_get_softc(dev);
292 * before detaching, we must make sure that the system is
293 * quiescent; nothing mounted, no pending activity.
298 * now, how are we supposed to maintain a list of our drives?
299 * iterate over our "child devices"?
308 ida_setup_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
310 struct ida_hardware_qcb *hwqcb = (struct ida_hardware_qcb *)arg;
313 hwqcb->hdr.size = (sizeof(struct ida_req) +
314 sizeof(struct ida_sgb) * IDA_NSEG) >> 2;
316 for (i = 0; i < nsegments; i++) {
317 hwqcb->seg[i].addr = segs[i].ds_addr;
318 hwqcb->seg[i].length = segs[i].ds_len;
320 hwqcb->req.sgcount = nsegments;
324 ida_command(struct ida_softc *ida, int command, void *data, int datasize,
325 int drive, u_int64_t pblkno, int flags)
327 struct ida_hardware_qcb *hwqcb;
333 qcb = ida_get_qcb(ida);
337 kprintf("ida_command: out of QCBs");
342 bzero(hwqcb, sizeof(struct ida_hdr) + sizeof(struct ida_req));
344 bus_dmamap_load(ida->buffer_dmat, qcb->dmamap,
345 (void *)data, datasize, ida_setup_dmamap, hwqcb, 0);
346 op = qcb->flags & DMA_DATA_IN ?
347 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE;
348 bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op);
350 hwqcb->hdr.drive = drive;
351 hwqcb->req.blkno = pblkno;
352 hwqcb->req.bcount = howmany(datasize, DEV_BSIZE);
353 hwqcb->req.command = command;
355 KKASSERT(pblkno < 0x100000000ULL);
357 qcb->flags = flags | IDA_COMMAND;
360 STAILQ_INSERT_TAIL(&ida->qcb_queue, qcb, link.stqe);
362 error = ida_wait(ida, qcb);
365 /* XXX should have status returned here? */
366 /* XXX have "status pointer" area in QCB? */
372 ida_submit_buf(struct ida_softc *ida, struct bio *bio)
374 bioqdisksort(&ida->bio_queue, bio);
375 ida_construct_qcb(ida);
380 ida_construct_qcb(struct ida_softc *ida)
382 struct ida_hardware_qcb *hwqcb;
388 bio = bioq_first(&ida->bio_queue);
390 return; /* no more buffers */
392 qcb = ida_get_qcb(ida);
394 return; /* out of resources */
396 bioq_remove(&ida->bio_queue, bio);
401 bzero(hwqcb, sizeof(struct ida_hdr) + sizeof(struct ida_req));
404 bus_dmamap_load(ida->buffer_dmat, qcb->dmamap,
405 (void *)bp->b_data, bp->b_bcount, ida_setup_dmamap, hwqcb, 0);
406 op = qcb->flags & DMA_DATA_IN ?
407 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE;
408 bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op);
411 struct idad_softc *drv;
413 drv = (struct idad_softc *)bio->bio_driver_info;
414 hwqcb->hdr.drive = drv->drive;
417 hwqcb->req.blkno = bio->bio_offset >> DEV_BSHIFT;
418 hwqcb->req.bcount = howmany(bp->b_bcount, DEV_BSIZE);
419 hwqcb->req.command = (bp->b_cmd == BUF_CMD_READ) ? CMD_READ : CMD_WRITE;
421 KKASSERT(bio->bio_offset < 0x100000000ULL * DEV_BSIZE);
423 STAILQ_INSERT_TAIL(&ida->qcb_queue, qcb, link.stqe);
427 * This routine will be called from ida_intr in order to queue up more
428 * I/O, meaning that we may be in an interrupt context. Hence, we should
429 * not muck around with spl() in this routine.
432 ida_start(struct ida_softc *ida)
436 while ((qcb = STAILQ_FIRST(&ida->qcb_queue)) != NULL) {
437 if (ida->cmd.fifo_full(ida))
439 STAILQ_REMOVE_HEAD(&ida->qcb_queue, link.stqe);
442 * place the qcb on an active list and set a timeout?
444 qcb->state = QCB_ACTIVE;
445 ida->cmd.submit(ida, qcb);
450 ida_wait(struct ida_softc *ida, struct ida_qcb *qcb)
452 struct ida_qcb *qcb_done = NULL;
453 bus_addr_t completed;
456 if (ida->flags & IDA_INTERRUPTS) {
457 if (tsleep((caddr_t)qcb, 0, "idacmd", 5 * hz))
463 delay = 5 * 1000 * 100; /* 5 sec delay */
464 while ((completed = ida->cmd.done(ida)) == 0) {
470 qcb_done = idahwqcbptov(ida, completed & ~3);
480 struct ida_softc *ida;
482 bus_addr_t completed;
484 ida = (struct ida_softc *)data;
486 if (ida->cmd.int_pending(ida) == 0)
487 return; /* not our interrupt */
489 while ((completed = ida->cmd.done(ida)) != 0) {
490 qcb = idahwqcbptov(ida, completed & ~3);
492 if (qcb == NULL || qcb->state != QCB_ACTIVE) {
493 device_printf(ida->dev,
494 "ignoring completion %jx\n", (uintmax_t)completed);
503 * should switch out command type; may be status, not just I/O.
506 ida_done(struct ida_softc *ida, struct ida_qcb *qcb)
513 if (qcb->flags & DMA_DATA_TRANSFER) {
516 op = qcb->flags & DMA_DATA_IN ?
517 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE;
518 bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op);
519 bus_dmamap_unload(ida->buffer_dmat, qcb->dmamap);
522 if (qcb->hwqcb->req.error & SOFT_ERROR)
523 device_printf(ida->dev, "soft error\n");
524 if (qcb->hwqcb->req.error & HARD_ERROR) {
526 device_printf(ida->dev, "hard error\n");
528 if (qcb->hwqcb->req.error & CMD_REJECTED) {
530 device_printf(ida->dev, "invalid request\n");
533 if (qcb->flags & IDA_COMMAND) {
534 if (ida->flags & IDA_INTERRUPTS)
538 qcb->bio->bio_buf->b_flags |= B_ERROR;
542 qcb->state = QCB_FREE;
543 SLIST_INSERT_HEAD(&ida->free_qcbs, qcb, link.sle);
544 ida_construct_qcb(ida);