/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 1999,2000 Jonathan Lemon * All rights reserved. * # Derived from the original IDA Compaq RAID driver, which is * Copyright (c) 1996, 1997, 1998, 1999 * Mark Dawson and David James. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); /* * Generic driver for Compaq SMART RAID adapters. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* prototypes */ static int ida_alloc_qcbs(struct ida_softc *ida); static void ida_done(struct ida_softc *ida, struct ida_qcb *qcb); static void ida_start(struct ida_softc *ida); static void ida_startio(struct ida_softc *ida); static void ida_startup(void *arg); static void ida_timeout(void *arg); static int ida_wait(struct ida_softc *ida, struct ida_qcb *qcb); static d_ioctl_t ida_ioctl; static struct cdevsw ida_cdevsw = { .d_version = D_VERSION, .d_ioctl = ida_ioctl, .d_name = "ida", }; void ida_free(struct ida_softc *ida) { int i; if (ida->ih != NULL) bus_teardown_intr(ida->dev, ida->irq, ida->ih); mtx_lock(&ida->lock); callout_stop(&ida->ch); mtx_unlock(&ida->lock); callout_drain(&ida->ch); if (ida->buffer_dmat) { for (i = 0; i < IDA_QCB_MAX; i++) bus_dmamap_destroy(ida->buffer_dmat, ida->qcbs[i].dmamap); bus_dma_tag_destroy(ida->buffer_dmat); } if (ida->hwqcb_dmat) { if (ida->hwqcb_busaddr) bus_dmamap_unload(ida->hwqcb_dmat, ida->hwqcb_dmamap); if (ida->hwqcbs) bus_dmamem_free(ida->hwqcb_dmat, ida->hwqcbs, ida->hwqcb_dmamap); bus_dma_tag_destroy(ida->hwqcb_dmat); } if (ida->qcbs != NULL) free(ida->qcbs, M_DEVBUF); if (ida->irq != NULL) bus_release_resource(ida->dev, ida->irq_res_type, 0, ida->irq); if (ida->parent_dmat != NULL) bus_dma_tag_destroy(ida->parent_dmat); if (ida->regs != NULL) bus_release_resource(ida->dev, ida->regs_res_type, ida->regs_res_id, ida->regs); mtx_destroy(&ida->lock); } /* * record bus address from bus_dmamap_load */ static void ida_dma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) { bus_addr_t *baddr; baddr = (bus_addr_t *)arg; *baddr = segs->ds_addr; } static __inline struct ida_qcb * ida_get_qcb(struct ida_softc *ida) { struct ida_qcb *qcb; if ((qcb = SLIST_FIRST(&ida->free_qcbs)) != NULL) { SLIST_REMOVE_HEAD(&ida->free_qcbs, link.sle); bzero(qcb->hwqcb, sizeof(struct ida_hdr) + sizeof(struct ida_req)); } return (qcb); } static __inline void ida_free_qcb(struct ida_softc *ida, struct ida_qcb *qcb) { qcb->state = QCB_FREE; qcb->buf = NULL; qcb->error = 0; SLIST_INSERT_HEAD(&ida->free_qcbs, qcb, link.sle); } static __inline bus_addr_t idahwqcbvtop(struct ida_softc *ida, struct ida_hardware_qcb *hwqcb) { return (ida->hwqcb_busaddr + ((bus_addr_t)hwqcb - (bus_addr_t)ida->hwqcbs)); } static __inline struct ida_qcb * idahwqcbptov(struct ida_softc *ida, bus_addr_t hwqcb_addr) { struct ida_hardware_qcb *hwqcb; hwqcb = (struct ida_hardware_qcb *) ((bus_addr_t)ida->hwqcbs + (hwqcb_addr - ida->hwqcb_busaddr)); return (hwqcb->qcb); } static int ida_alloc_qcbs(struct ida_softc *ida) { struct ida_qcb *qcb; int error, i; for (i = 0; i < IDA_QCB_MAX; i++) { qcb = &ida->qcbs[i]; error = bus_dmamap_create(ida->buffer_dmat, /*flags*/0, &qcb->dmamap); if (error != 0) return (error); qcb->ida = ida; qcb->flags = QCB_FREE; qcb->hwqcb = &ida->hwqcbs[i]; qcb->hwqcb->qcb = qcb; qcb->hwqcb_busaddr = idahwqcbvtop(ida, qcb->hwqcb); SLIST_INSERT_HEAD(&ida->free_qcbs, qcb, link.sle); } return (0); } int ida_setup(struct ida_softc *ida) { struct ida_controller_info cinfo; device_t child; int error, i, unit; SLIST_INIT(&ida->free_qcbs); STAILQ_INIT(&ida->qcb_queue); bioq_init(&ida->bio_queue); ida->qcbs = (struct ida_qcb *) malloc(IDA_QCB_MAX * sizeof(struct ida_qcb), M_DEVBUF, M_NOWAIT | M_ZERO); if (ida->qcbs == NULL) return (ENOMEM); /* * Create our DMA tags */ /* DMA tag for our hardware QCB structures */ error = bus_dma_tag_create( /* parent */ ida->parent_dmat, /* alignment */ 1, /* boundary */ 0, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ BUS_SPACE_MAXADDR, /* filter */ NULL, /* filterarg */ NULL, /* maxsize */ IDA_QCB_MAX * sizeof(struct ida_hardware_qcb), /* nsegments */ 1, /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT, /* flags */ 0, /* lockfunc */ NULL, /* lockarg */ NULL, &ida->hwqcb_dmat); if (error) return (ENOMEM); /* DMA tag for mapping buffers into device space */ error = bus_dma_tag_create( /* parent */ ida->parent_dmat, /* alignment */ 1, /* boundary */ 0, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ BUS_SPACE_MAXADDR, /* filter */ NULL, /* filterarg */ NULL, /* maxsize */ DFLTPHYS, /* nsegments */ IDA_NSEG, /* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT, /* flags */ 0, /* lockfunc */ busdma_lock_mutex, /* lockarg */ &ida->lock, &ida->buffer_dmat); if (error) return (ENOMEM); /* Allocation of hardware QCBs */ /* XXX allocation is rounded to hardware page size */ error = bus_dmamem_alloc(ida->hwqcb_dmat, (void **)&ida->hwqcbs, BUS_DMA_NOWAIT, &ida->hwqcb_dmamap); if (error) return (ENOMEM); /* And permanently map them in */ bus_dmamap_load(ida->hwqcb_dmat, ida->hwqcb_dmamap, ida->hwqcbs, IDA_QCB_MAX * sizeof(struct ida_hardware_qcb), ida_dma_map_cb, &ida->hwqcb_busaddr, /*flags*/0); bzero(ida->hwqcbs, IDA_QCB_MAX * sizeof(struct ida_hardware_qcb)); error = ida_alloc_qcbs(ida); if (error) return (error); mtx_lock(&ida->lock); ida->cmd.int_enable(ida, 0); error = ida_command(ida, CMD_GET_CTRL_INFO, &cinfo, sizeof(cinfo), IDA_CONTROLLER, 0, DMA_DATA_IN); if (error) { mtx_unlock(&ida->lock); device_printf(ida->dev, "CMD_GET_CTRL_INFO failed.\n"); return (error); } device_printf(ida->dev, "drives=%d firm_rev=%c%c%c%c\n", cinfo.num_drvs, cinfo.firm_rev[0], cinfo.firm_rev[1], cinfo.firm_rev[2], cinfo.firm_rev[3]); if (ida->flags & IDA_FIRMWARE) { int data; error = ida_command(ida, CMD_START_FIRMWARE, &data, sizeof(data), IDA_CONTROLLER, 0, DMA_DATA_IN); if (error) { mtx_unlock(&ida->lock); device_printf(ida->dev, "CMD_START_FIRMWARE failed.\n"); return (error); } } ida->cmd.int_enable(ida, 1); ida->flags |= IDA_ATTACHED; mtx_unlock(&ida->lock); for (i = 0; i < cinfo.num_drvs; i++) { child = device_add_child(ida->dev, /*"idad"*/NULL, -1); if (child != NULL) device_set_ivars(child, (void *)(intptr_t)i); } ida->ich.ich_func = ida_startup; ida->ich.ich_arg = ida; if (config_intrhook_establish(&ida->ich) != 0) { device_delete_children(ida->dev); device_printf(ida->dev, "Cannot establish configuration hook\n"); return (error); } unit = device_get_unit(ida->dev); ida->ida_dev_t = make_dev(&ida_cdevsw, unit, UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, "ida%d", unit); ida->ida_dev_t->si_drv1 = ida; return (0); } static void ida_startup(void *arg) { struct ida_softc *ida; ida = arg; config_intrhook_disestablish(&ida->ich); bus_topo_lock(); bus_generic_attach(ida->dev); bus_topo_unlock(); } int ida_detach(device_t dev) { struct ida_softc *ida; int error; ida = (struct ida_softc *)device_get_softc(dev); error = bus_generic_detach(dev); if (error) return (error); error = device_delete_children(dev); if (error) return (error); /* * XXX * before detaching, we must make sure that the system is * quiescent; nothing mounted, no pending activity. */ /* * XXX * now, how are we supposed to maintain a list of our drives? * iterate over our "child devices"? */ destroy_dev(ida->ida_dev_t); ida_free(ida); return (error); } static void ida_data_cb(void *arg, bus_dma_segment_t *segs, int nsegments, int error) { struct ida_hardware_qcb *hwqcb; struct ida_softc *ida; struct ida_qcb *qcb; bus_dmasync_op_t op; int i; qcb = arg; ida = qcb->ida; if (!dumping) mtx_assert(&ida->lock, MA_OWNED); if (error) { qcb->error = error; ida_done(ida, qcb); return; } hwqcb = qcb->hwqcb; hwqcb->hdr.size = htole16((sizeof(struct ida_req) + sizeof(struct ida_sgb) * IDA_NSEG) >> 2); for (i = 0; i < nsegments; i++) { hwqcb->seg[i].addr = htole32(segs[i].ds_addr); hwqcb->seg[i].length = htole32(segs[i].ds_len); } hwqcb->req.sgcount = nsegments; if (qcb->flags & DMA_DATA_TRANSFER) { switch (qcb->flags & DMA_DATA_TRANSFER) { case DMA_DATA_TRANSFER: op = BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE; break; case DMA_DATA_IN: op = BUS_DMASYNC_PREREAD; break; default: KASSERT((qcb->flags & DMA_DATA_TRANSFER) == DMA_DATA_OUT, ("bad DMA data flags")); op = BUS_DMASYNC_PREWRITE; break; } bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op); } bus_dmamap_sync(ida->hwqcb_dmat, ida->hwqcb_dmamap, BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD); STAILQ_INSERT_TAIL(&ida->qcb_queue, qcb, link.stqe); ida_start(ida); ida->flags &= ~IDA_QFROZEN; } static int ida_map_qcb(struct ida_softc *ida, struct ida_qcb *qcb, void *data, bus_size_t datasize) { int error, flags; if (ida->flags & IDA_INTERRUPTS) flags = BUS_DMA_WAITOK; else flags = BUS_DMA_NOWAIT; error = bus_dmamap_load(ida->buffer_dmat, qcb->dmamap, data, datasize, ida_data_cb, qcb, flags); if (error == EINPROGRESS) { ida->flags |= IDA_QFROZEN; error = 0; } return (error); } int ida_command(struct ida_softc *ida, int command, void *data, int datasize, int drive, u_int32_t pblkno, int flags) { struct ida_hardware_qcb *hwqcb; struct ida_qcb *qcb; int error; if (!dumping) mtx_assert(&ida->lock, MA_OWNED); qcb = ida_get_qcb(ida); if (qcb == NULL) { device_printf(ida->dev, "out of QCBs\n"); return (EAGAIN); } qcb->flags = flags | IDA_COMMAND; hwqcb = qcb->hwqcb; hwqcb->hdr.drive = drive; hwqcb->req.blkno = htole32(pblkno); hwqcb->req.bcount = htole16(howmany(datasize, DEV_BSIZE)); hwqcb->req.command = command; error = ida_map_qcb(ida, qcb, data, datasize); if (error == 0) { error = ida_wait(ida, qcb); /* Don't free QCB on a timeout in case it later completes. */ if (error) return (error); error = qcb->error; } /* XXX should have status returned here? */ /* XXX have "status pointer" area in QCB? */ ida_free_qcb(ida, qcb); return (error); } void ida_submit_buf(struct ida_softc *ida, struct bio *bp) { mtx_lock(&ida->lock); bioq_insert_tail(&ida->bio_queue, bp); ida_startio(ida); mtx_unlock(&ida->lock); } static void ida_startio(struct ida_softc *ida) { struct ida_hardware_qcb *hwqcb; struct ida_qcb *qcb; struct idad_softc *drv; struct bio *bp; int error; mtx_assert(&ida->lock, MA_OWNED); for (;;) { if (ida->flags & IDA_QFROZEN) return; bp = bioq_first(&ida->bio_queue); if (bp == NULL) return; /* no more buffers */ qcb = ida_get_qcb(ida); if (qcb == NULL) return; /* out of resources */ bioq_remove(&ida->bio_queue, bp); qcb->buf = bp; qcb->flags = bp->bio_cmd == BIO_READ ? DMA_DATA_IN : DMA_DATA_OUT; hwqcb = qcb->hwqcb; drv = bp->bio_driver1; hwqcb->hdr.drive = drv->drive; hwqcb->req.blkno = bp->bio_pblkno; hwqcb->req.bcount = howmany(bp->bio_bcount, DEV_BSIZE); hwqcb->req.command = bp->bio_cmd == BIO_READ ? CMD_READ : CMD_WRITE; error = ida_map_qcb(ida, qcb, bp->bio_data, bp->bio_bcount); if (error) { qcb->error = error; ida_done(ida, qcb); } } } static void ida_start(struct ida_softc *ida) { struct ida_qcb *qcb; if (!dumping) mtx_assert(&ida->lock, MA_OWNED); while ((qcb = STAILQ_FIRST(&ida->qcb_queue)) != NULL) { if (ida->cmd.fifo_full(ida)) break; STAILQ_REMOVE_HEAD(&ida->qcb_queue, link.stqe); /* * XXX * place the qcb on an active list? */ /* Set a timeout. */ if (!ida->qactive && !dumping) callout_reset(&ida->ch, hz * 5, ida_timeout, ida); ida->qactive++; qcb->state = QCB_ACTIVE; ida->cmd.submit(ida, qcb); } } static int ida_wait(struct ida_softc *ida, struct ida_qcb *qcb) { struct ida_qcb *qcb_done = NULL; bus_addr_t completed; int delay; if (!dumping) mtx_assert(&ida->lock, MA_OWNED); if (ida->flags & IDA_INTERRUPTS) { if (mtx_sleep(qcb, &ida->lock, PRIBIO, "idacmd", 5 * hz)) { qcb->state = QCB_TIMEDOUT; return (ETIMEDOUT); } return (0); } again: delay = 5 * 1000 * 100; /* 5 sec delay */ while ((completed = ida->cmd.done(ida)) == 0) { if (delay-- == 0) { qcb->state = QCB_TIMEDOUT; return (ETIMEDOUT); } DELAY(10); } qcb_done = idahwqcbptov(ida, completed & ~3); if (qcb_done != qcb) goto again; ida_done(ida, qcb); return (0); } void ida_intr(void *data) { struct ida_softc *ida; struct ida_qcb *qcb; bus_addr_t completed; ida = (struct ida_softc *)data; mtx_lock(&ida->lock); if (ida->cmd.int_pending(ida) == 0) { mtx_unlock(&ida->lock); return; /* not our interrupt */ } while ((completed = ida->cmd.done(ida)) != 0) { qcb = idahwqcbptov(ida, completed & ~3); if (qcb == NULL || qcb->state != QCB_ACTIVE) { device_printf(ida->dev, "ignoring completion %jx\n", (intmax_t)completed); continue; } /* Handle "Bad Command List" errors. */ if ((completed & 3) && (qcb->hwqcb->req.error == 0)) qcb->hwqcb->req.error = CMD_REJECTED; ida_done(ida, qcb); } ida_startio(ida); mtx_unlock(&ida->lock); } /* * should switch out command type; may be status, not just I/O. */ static void ida_done(struct ida_softc *ida, struct ida_qcb *qcb) { bus_dmasync_op_t op; int active, error = 0; /* * finish up command */ if (!dumping) mtx_assert(&ida->lock, MA_OWNED); active = (qcb->state != QCB_FREE); if (qcb->flags & DMA_DATA_TRANSFER && active) { switch (qcb->flags & DMA_DATA_TRANSFER) { case DMA_DATA_TRANSFER: op = BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE; break; case DMA_DATA_IN: op = BUS_DMASYNC_POSTREAD; break; default: KASSERT((qcb->flags & DMA_DATA_TRANSFER) == DMA_DATA_OUT, ("bad DMA data flags")); op = BUS_DMASYNC_POSTWRITE; break; } bus_dmamap_sync(ida->buffer_dmat, qcb->dmamap, op); bus_dmamap_unload(ida->buffer_dmat, qcb->dmamap); } if (active) bus_dmamap_sync(ida->hwqcb_dmat, ida->hwqcb_dmamap, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); if (qcb->hwqcb->req.error & SOFT_ERROR) { if (qcb->buf) device_printf(ida->dev, "soft %s error\n", qcb->buf->bio_cmd == BIO_READ ? "read" : "write"); else device_printf(ida->dev, "soft error\n"); } if (qcb->hwqcb->req.error & HARD_ERROR) { error = 1; if (qcb->buf) device_printf(ida->dev, "hard %s error\n", qcb->buf->bio_cmd == BIO_READ ? "read" : "write"); else device_printf(ida->dev, "hard error\n"); } if (qcb->hwqcb->req.error & CMD_REJECTED) { error = 1; device_printf(ida->dev, "invalid request\n"); } if (qcb->error) { error = 1; device_printf(ida->dev, "request failed to map: %d\n", qcb->error); } if (qcb->flags & IDA_COMMAND) { if (ida->flags & IDA_INTERRUPTS) wakeup(qcb); if (qcb->state == QCB_TIMEDOUT) ida_free_qcb(ida, qcb); } else { KASSERT(qcb->buf != NULL, ("ida_done(): qcb->buf is NULL!")); if (error) qcb->buf->bio_flags |= BIO_ERROR; idad_intr(qcb->buf); ida_free_qcb(ida, qcb); } if (!active) return; ida->qactive--; /* Reschedule or cancel timeout */ if (ida->qactive) callout_reset(&ida->ch, hz * 5, ida_timeout, ida); else callout_stop(&ida->ch); } static void ida_timeout(void *arg) { struct ida_softc *ida; ida = (struct ida_softc *)arg; device_printf(ida->dev, "%s() qactive %d\n", __func__, ida->qactive); if (ida->flags & IDA_INTERRUPTS) device_printf(ida->dev, "IDA_INTERRUPTS\n"); device_printf(ida->dev, "\t R_CMD_FIFO: %08x\n" "\t R_DONE_FIFO: %08x\n" "\t R_INT_MASK: %08x\n" "\t R_STATUS: %08x\n" "\tR_INT_PENDING: %08x\n", ida_inl(ida, R_CMD_FIFO), ida_inl(ida, R_DONE_FIFO), ida_inl(ida, R_INT_MASK), ida_inl(ida, R_STATUS), ida_inl(ida, R_INT_PENDING)); return; } /* * IOCTL stuff follows. */ struct cmd_info { int cmd; int len; int flags; }; static struct cmd_info *ida_cmd_lookup(int); static int ida_ioctl (struct cdev *dev, u_long cmd, caddr_t addr, int32_t flag, struct thread *td) { struct ida_softc *sc; struct ida_user_command *uc; struct cmd_info *ci; int len; int flags; int error; int data; void *daddr; sc = (struct ida_softc *)dev->si_drv1; uc = (struct ida_user_command *)addr; error = 0; switch (cmd) { case IDAIO_COMMAND: ci = ida_cmd_lookup(uc->command); if (ci == NULL) { error = EINVAL; break; } len = ci->len; flags = ci->flags; if (len) daddr = &uc->d.buf; else { daddr = &data; len = sizeof(data); } mtx_lock(&sc->lock); error = ida_command(sc, uc->command, daddr, len, uc->drive, uc->blkno, flags); mtx_unlock(&sc->lock); break; default: error = ENOIOCTL; break; } return (error); } static struct cmd_info ci_list[] = { { CMD_GET_LOG_DRV_INFO, sizeof(struct ida_drive_info), DMA_DATA_IN }, { CMD_GET_CTRL_INFO, sizeof(struct ida_controller_info), DMA_DATA_IN }, { CMD_SENSE_DRV_STATUS, sizeof(struct ida_drive_status), DMA_DATA_IN }, { CMD_START_RECOVERY, 0, 0 }, { CMD_GET_PHYS_DRV_INFO, sizeof(struct ida_phys_drv_info), DMA_DATA_TRANSFER }, { CMD_BLINK_DRV_LEDS, sizeof(struct ida_blink_drv_leds), DMA_DATA_OUT }, { CMD_SENSE_DRV_LEDS, sizeof(struct ida_blink_drv_leds), DMA_DATA_IN }, { CMD_GET_LOG_DRV_EXT, sizeof(struct ida_drive_info_ext), DMA_DATA_IN }, { CMD_RESET_CTRL, 0, 0 }, { CMD_GET_CONFIG, 0, 0 }, { CMD_SET_CONFIG, 0, 0 }, { CMD_LABEL_LOG_DRV, sizeof(struct ida_label_logical), DMA_DATA_OUT }, { CMD_SET_SURFACE_DELAY, 0, 0 }, { CMD_SENSE_BUS_PARAMS, 0, 0 }, { CMD_SENSE_SUBSYS_INFO, 0, 0 }, { CMD_SENSE_SURFACE_ATS, 0, 0 }, { CMD_PASSTHROUGH, 0, 0 }, { CMD_RESET_SCSI_DEV, 0, 0 }, { CMD_PAUSE_BG_ACT, 0, 0 }, { CMD_RESUME_BG_ACT, 0, 0 }, { CMD_START_FIRMWARE, 0, 0 }, { CMD_SENSE_DRV_ERR_LOG, 0, 0 }, { CMD_START_CPM, 0, 0 }, { CMD_SENSE_CP, 0, 0 }, { CMD_STOP_CPM, 0, 0 }, { CMD_FLUSH_CACHE, 0, 0 }, { CMD_ACCEPT_MEDIA_EXCH, 0, 0 }, { 0, 0, 0 } }; static struct cmd_info * ida_cmd_lookup (int command) { struct cmd_info *ci; ci = ci_list; while (ci->cmd) { if (ci->cmd == command) return (ci); ci++; } return (NULL); }