/* $NetBSD: atapi_wdc.c,v 1.111 2010/03/28 20:46:18 snj Exp $ */ /* * Copyright (c) 1998, 2001 Manuel Bouyer. * * 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 ``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 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 __KERNEL_RCSID(0, "$NetBSD: atapi_wdc.c,v 1.111 2010/03/28 20:46:18 snj Exp $"); #ifndef ATADEBUG #define ATADEBUG #endif /* ATADEBUG */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __BUS_SPACE_HAS_STREAM_METHODS #define bus_space_write_multi_stream_2 bus_space_write_multi_2 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ #include #include #include #include #include #include /* for SCSI status */ #define DEBUG_INTR 0x01 #define DEBUG_XFERS 0x02 #define DEBUG_STATUS 0x04 #define DEBUG_FUNCS 0x08 #define DEBUG_PROBE 0x10 #ifdef ATADEBUG int wdcdebug_atapi_mask = 0; #define ATADEBUG_PRINT(args, level) \ if (wdcdebug_atapi_mask & (level)) \ printf args #else #define ATADEBUG_PRINT(args, level) #endif #define ATAPI_DELAY 10 /* 10 ms, this is used only before sending a cmd */ #define ATAPI_MODE_DELAY 1000 /* 1s, timeout for SET_FEATYRE cmds */ static int wdc_atapi_get_params(struct scsipi_channel *, int, struct ataparams *); static void wdc_atapi_probe_device(struct atapibus_softc *, int); static void wdc_atapi_minphys (struct buf *bp); static void wdc_atapi_start(struct ata_channel *,struct ata_xfer *); static int wdc_atapi_intr(struct ata_channel *, struct ata_xfer *, int); static void wdc_atapi_kill_xfer(struct ata_channel *, struct ata_xfer *, int); static void wdc_atapi_phase_complete(struct ata_xfer *); static void wdc_atapi_done(struct ata_channel *, struct ata_xfer *); static void wdc_atapi_reset(struct ata_channel *, struct ata_xfer *); static void wdc_atapi_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t, void *); static void wdc_atapi_kill_pending(struct scsipi_periph *); static void wdc_atapi_polldsc(void *arg); #define MAX_SIZE MAXPHYS static const struct scsipi_bustype wdc_atapi_bustype = { SCSIPI_BUSTYPE_ATAPI, atapi_scsipi_cmd, atapi_interpret_sense, atapi_print_addr, wdc_atapi_kill_pending, }; void wdc_atapibus_attach(struct atabus_softc *ata_sc) { struct ata_channel *chp = ata_sc->sc_chan; struct atac_softc *atac = chp->ch_atac; struct scsipi_adapter *adapt = &atac->atac_atapi_adapter._generic; struct scsipi_channel *chan = &chp->ch_atapi_channel; /* * Fill in the scsipi_adapter. */ adapt->adapt_dev = atac->atac_dev; adapt->adapt_nchannels = atac->atac_nchannels; adapt->adapt_request = wdc_atapi_scsipi_request; adapt->adapt_minphys = wdc_atapi_minphys; if (atac->atac_cap & ATAC_CAP_NOIRQ) adapt->adapt_flags |= SCSIPI_ADAPT_POLL_ONLY; atac->atac_atapi_adapter.atapi_probe_device = wdc_atapi_probe_device; /* * Fill in the scsipi_channel. */ memset(chan, 0, sizeof(*chan)); chan->chan_adapter = adapt; chan->chan_bustype = &wdc_atapi_bustype; chan->chan_channel = chp->ch_channel; chan->chan_flags = SCSIPI_CHAN_OPENINGS; chan->chan_openings = 1; chan->chan_max_periph = 1; chan->chan_ntargets = 2; chan->chan_nluns = 1; chp->atapibus = config_found_ia(ata_sc->sc_dev, "atapi", chan, atapiprint); } static void wdc_atapi_minphys(struct buf *bp) { if (bp->b_bcount > MAX_SIZE) bp->b_bcount = MAX_SIZE; minphys(bp); } /* * Kill off all pending xfers for a periph. * * Must be called at splbio(). */ static void wdc_atapi_kill_pending(struct scsipi_periph *periph) { struct atac_softc *atac = device_private(periph->periph_channel->chan_adapter->adapt_dev); struct ata_channel *chp = atac->atac_channels[periph->periph_channel->chan_channel]; ata_kill_pending(&chp->ch_drive[periph->periph_target]); } static void wdc_atapi_kill_xfer(struct ata_channel *chp, struct ata_xfer *xfer, int reason) { struct scsipi_xfer *sc_xfer = xfer->c_cmd; /* remove this command from xfer queue */ switch (reason) { case KILL_GONE: sc_xfer->error = XS_DRIVER_STUFFUP; break; case KILL_RESET: sc_xfer->error = XS_RESET; break; default: printf("wdc_ata_bio_kill_xfer: unknown reason %d\n", reason); panic("wdc_ata_bio_kill_xfer"); } ata_free_xfer(chp, xfer); scsipi_done(sc_xfer); } static int wdc_atapi_get_params(struct scsipi_channel *chan, int drive, struct ataparams *id) { struct wdc_softc *wdc = device_private(chan->chan_adapter->adapt_dev); struct atac_softc *atac = &wdc->sc_atac; struct wdc_regs *wdr = &wdc->regs[chan->chan_channel]; struct ata_channel *chp = atac->atac_channels[chan->chan_channel]; struct ata_command ata_c; /* if no ATAPI device detected at wdc attach time, skip */ if ((chp->ch_drive[drive].drive_flags & DRIVE_ATAPI) == 0) { ATADEBUG_PRINT(("wdc_atapi_get_params: drive %d not present\n", drive), DEBUG_PROBE); return -1; } memset(&ata_c, 0, sizeof(struct ata_command)); ata_c.r_command = ATAPI_SOFT_RESET; ata_c.r_st_bmask = 0; ata_c.r_st_pmask = 0; ata_c.flags = AT_WAIT | AT_POLL; ata_c.timeout = WDC_RESET_WAIT; if (wdc_exec_command(&chp->ch_drive[drive], &ata_c) != ATACMD_COMPLETE) { printf("wdc_atapi_get_params: ATAPI_SOFT_RESET failed for" " drive %s:%d:%d: driver failed\n", device_xname(atac->atac_dev), chp->ch_channel, drive); panic("wdc_atapi_get_params"); } if (ata_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) { ATADEBUG_PRINT(("wdc_atapi_get_params: ATAPI_SOFT_RESET " "failed for drive %s:%d:%d: error 0x%x\n", device_xname(atac->atac_dev), chp->ch_channel, drive, ata_c.r_error), DEBUG_PROBE); return -1; } chp->ch_drive[drive].state = 0; (void)bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); /* Some ATAPI devices need a bit more time after software reset. */ delay(5000); if (ata_get_params(&chp->ch_drive[drive], AT_WAIT, id) != 0) { ATADEBUG_PRINT(("wdc_atapi_get_params: ATAPI_IDENTIFY_DEVICE " "failed for drive %s:%d:%d: error 0x%x\n", device_xname(atac->atac_dev), chp->ch_channel, drive, ata_c.r_error), DEBUG_PROBE); return -1; } return 0; } static void wdc_atapi_probe_device(struct atapibus_softc *sc, int target) { struct scsipi_channel *chan = sc->sc_channel; struct scsipi_periph *periph; struct ataparams ids; struct ataparams *id = &ids; struct wdc_softc *wdc = device_private(chan->chan_adapter->adapt_dev); struct atac_softc *atac = &wdc->sc_atac; struct ata_channel *chp = atac->atac_channels[chan->chan_channel]; struct ata_drive_datas *drvp = &chp->ch_drive[target]; struct scsipibus_attach_args sa; char serial_number[21], model[41], firmware_revision[9]; int s; /* skip if already attached */ if (scsipi_lookup_periph(chan, target, 0) != NULL) return; if (wdc_atapi_get_params(chan, target, id) == 0) { #ifdef ATAPI_DEBUG_PROBE printf("%s drive %d: cmdsz 0x%x drqtype 0x%x\n", device_xname(sc->sc_dev), target, id->atap_config & ATAPI_CFG_CMD_MASK, id->atap_config & ATAPI_CFG_DRQ_MASK); #endif periph = scsipi_alloc_periph(M_NOWAIT); if (periph == NULL) { aprint_error_dev(sc->sc_dev, "unable to allocate periph for drive %d\n", target); return; } periph->periph_dev = NULL; periph->periph_channel = chan; periph->periph_switch = &atapi_probe_periphsw; periph->periph_target = target; periph->periph_lun = 0; periph->periph_quirks = PQUIRK_ONLYBIG; #ifdef SCSIPI_DEBUG if (SCSIPI_DEBUG_TYPE == SCSIPI_BUSTYPE_ATAPI && SCSIPI_DEBUG_TARGET == target) periph->periph_dbflags |= SCSIPI_DEBUG_FLAGS; #endif periph->periph_type = ATAPI_CFG_TYPE(id->atap_config); if (id->atap_config & ATAPI_CFG_REMOV) periph->periph_flags |= PERIPH_REMOVABLE; if (periph->periph_type == T_SEQUENTIAL) { s = splbio(); drvp->drive_flags |= DRIVE_ATAPIST; splx(s); } sa.sa_periph = periph; sa.sa_inqbuf.type = ATAPI_CFG_TYPE(id->atap_config); sa.sa_inqbuf.removable = id->atap_config & ATAPI_CFG_REMOV ? T_REMOV : T_FIXED; scsipi_strvis((u_char *)model, 40, id->atap_model, 40); scsipi_strvis((u_char *)serial_number, 20, id->atap_serial, 20); scsipi_strvis((u_char *)firmware_revision, 8, id->atap_revision, 8); sa.sa_inqbuf.vendor = model; sa.sa_inqbuf.product = serial_number; sa.sa_inqbuf.revision = firmware_revision; /* * Determine the operating mode capabilities of the device. */ if ((id->atap_config & ATAPI_CFG_CMD_MASK) == ATAPI_CFG_CMD_16) periph->periph_cap |= PERIPH_CAP_CMD16; /* XXX This is gross. */ periph->periph_cap |= (id->atap_config & ATAPI_CFG_DRQ_MASK); drvp->drv_softc = atapi_probe_device(sc, target, periph, &sa); if (drvp->drv_softc) ata_probe_caps(drvp); else { s = splbio(); drvp->drive_flags &= ~DRIVE_ATAPI; splx(s); } } else { s = splbio(); drvp->drive_flags &= ~DRIVE_ATAPI; splx(s); } } static void wdc_atapi_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, void *arg) { struct scsipi_adapter *adapt = chan->chan_adapter; struct scsipi_periph *periph; struct scsipi_xfer *sc_xfer; struct wdc_softc *wdc = device_private(adapt->adapt_dev); struct atac_softc *atac = &wdc->sc_atac; struct ata_xfer *xfer; int channel = chan->chan_channel; int drive, s; switch (req) { case ADAPTER_REQ_RUN_XFER: sc_xfer = arg; periph = sc_xfer->xs_periph; drive = periph->periph_target; ATADEBUG_PRINT(("wdc_atapi_scsipi_request %s:%d:%d\n", device_xname(atac->atac_dev), channel, drive), DEBUG_XFERS); if (!device_is_active(atac->atac_dev)) { sc_xfer->error = XS_DRIVER_STUFFUP; scsipi_done(sc_xfer); return; } xfer = ata_get_xfer(ATAXF_NOSLEEP); if (xfer == NULL) { sc_xfer->error = XS_RESOURCE_SHORTAGE; scsipi_done(sc_xfer); return; } if (sc_xfer->xs_control & XS_CTL_POLL) xfer->c_flags |= C_POLL; #if NATA_DMA if ((atac->atac_channels[channel]->ch_drive[drive].drive_flags & (DRIVE_DMA | DRIVE_UDMA)) && sc_xfer->datalen > 0) xfer->c_flags |= C_DMA; #endif #if NATA_DMA && NATA_PIOBM else #endif #if NATA_PIOBM if ((atac->atac_cap & ATAC_CAP_PIOBM) && sc_xfer->datalen > 0) xfer->c_flags |= C_PIOBM; #endif xfer->c_drive = drive; xfer->c_flags |= C_ATAPI; #if NATA_DMA if (sc_xfer->cmd->opcode == GPCMD_REPORT_KEY || sc_xfer->cmd->opcode == GPCMD_SEND_KEY || sc_xfer->cmd->opcode == GPCMD_READ_DVD_STRUCTURE) { /* * DVD authentication commands must always be done in * PIO mode. */ xfer->c_flags &= ~C_DMA; } /* * DMA normally can't deal with transfers which are not a * multiple of its databus width. It's a bug to request odd * length transfers for ATAPI. * * Some devices also can't cope with unaligned DMA xfers * either. Also some devices seem to not handle DMA xfers of * less than 4 bytes. * * By enforcing at least 4 byte aligned offset and length for * DMA, we might use PIO where DMA could be allowed but better * safe than sorry as recent problems proved. * * Offending structures that are thus done by PIO instead of * DMA are normally small structures since all bulkdata is * aligned. But as the request may come from userland, we have * to protect against it anyway. * * XXX check for the 32 bit wide flag? */ if (((uintptr_t) sc_xfer->data) & 0x03) xfer->c_flags &= ~C_DMA; if ((sc_xfer->datalen < 4) || (sc_xfer->datalen & 0x03)) xfer->c_flags &= ~C_DMA; #endif /* NATA_DMA */ xfer->c_cmd = sc_xfer; xfer->c_databuf = sc_xfer->data; xfer->c_bcount = sc_xfer->datalen; xfer->c_start = wdc_atapi_start; xfer->c_intr = wdc_atapi_intr; xfer->c_kill_xfer = wdc_atapi_kill_xfer; xfer->c_dscpoll = 0; s = splbio(); ata_exec_xfer(atac->atac_channels[channel], xfer); #ifdef DIAGNOSTIC if ((sc_xfer->xs_control & XS_CTL_POLL) != 0 && (sc_xfer->xs_status & XS_STS_DONE) == 0) panic("wdc_atapi_scsipi_request: polled command " "not done"); #endif splx(s); return; default: /* Not supported, nothing to do. */ ; } } static void wdc_atapi_start(struct ata_channel *chp, struct ata_xfer *xfer) { struct atac_softc *atac = chp->ch_atac; struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; struct scsipi_xfer *sc_xfer = xfer->c_cmd; struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; int wait_flags = (sc_xfer->xs_control & XS_CTL_POLL) ? AT_POLL : 0; const char *errstring; ATADEBUG_PRINT(("wdc_atapi_start %s:%d:%d, scsi flags 0x%x \n", device_xname(atac->atac_dev), chp->ch_channel, drvp->drive, sc_xfer->xs_control), DEBUG_XFERS); #if NATA_DMA if ((xfer->c_flags & C_DMA) && (drvp->n_xfers <= NXFER)) drvp->n_xfers++; #endif /* Do control operations specially. */ if (__predict_false(drvp->state < READY)) { /* If it's not a polled command, we need the kernel thread */ if ((sc_xfer->xs_control & XS_CTL_POLL) == 0 && (chp->ch_flags & ATACH_TH_RUN) == 0) { chp->ch_queue->queue_freeze++; wakeup(&chp->ch_thread); return; } /* * disable interrupts, all commands here should be quick * enough to be able to poll, and we don't go here that often */ bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT | WDCTL_IDS); if (wdc->select) wdc->select(chp, xfer->c_drive); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | (xfer->c_drive << 4)); /* Don't try to set mode if controller can't be adjusted */ if (atac->atac_set_modes == NULL) goto ready; /* Also don't try if the drive didn't report its mode */ if ((drvp->drive_flags & DRIVE_MODE) == 0) goto ready; errstring = "unbusy"; if (wdc_wait_for_unbusy(chp, ATAPI_DELAY, wait_flags)) goto timeout; wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 0x08 | drvp->PIO_mode, WDSF_SET_MODE); errstring = "piomode"; if (wdc_wait_for_unbusy(chp, ATAPI_MODE_DELAY, wait_flags)) goto timeout; if (chp->ch_status & WDCS_ERR) { if (chp->ch_error == WDCE_ABRT) { /* * Some ATAPI drives reject PIO settings. * Fall back to PIO mode 3 since that's the * minimum for ATAPI. */ printf("%s:%d:%d: PIO mode %d rejected, " "falling back to PIO mode 3\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, drvp->PIO_mode); if (drvp->PIO_mode > 3) drvp->PIO_mode = 3; } else goto error; } #if NATA_DMA #if NATA_UDMA if (drvp->drive_flags & DRIVE_UDMA) { wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 0x40 | drvp->UDMA_mode, WDSF_SET_MODE); } else #endif if (drvp->drive_flags & DRIVE_DMA) { wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 0x20 | drvp->DMA_mode, WDSF_SET_MODE); } else { goto ready; } errstring = "dmamode"; if (wdc_wait_for_unbusy(chp, ATAPI_MODE_DELAY, wait_flags)) goto timeout; if (chp->ch_status & WDCS_ERR) { if (chp->ch_error == WDCE_ABRT) { #if NATA_UDMA if (drvp->drive_flags & DRIVE_UDMA) goto error; else #endif { /* * The drive rejected our DMA setting. * Fall back to mode 1. */ printf("%s:%d:%d: DMA mode %d rejected, " "falling back to DMA mode 0\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, drvp->DMA_mode); if (drvp->DMA_mode > 0) drvp->DMA_mode = 0; } } else goto error; } #endif /* NATA_DMA */ ready: drvp->state = READY; bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); delay(10); /* some drives need a little delay here */ } /* start timeout machinery */ if ((sc_xfer->xs_control & XS_CTL_POLL) == 0) callout_reset(&chp->ch_callout, mstohz(sc_xfer->timeout), wdctimeout, chp); if (wdc->select) wdc->select(chp, xfer->c_drive); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | (xfer->c_drive << 4)); switch (wdc_wait_for_unbusy(chp, ATAPI_DELAY, wait_flags) < 0) { case WDCWAIT_OK: break; case WDCWAIT_TOUT: printf("wdc_atapi_start: not ready, st = %02x\n", chp->ch_status); sc_xfer->error = XS_TIMEOUT; wdc_atapi_reset(chp, xfer); return; case WDCWAIT_THR: return; } /* * Even with WDCS_ERR, the device should accept a command packet * Limit length to what can be stuffed into the cylinder register * (16 bits). Some CD-ROMs seem to interpret '0' as 65536, * but not all devices do that and it's not obvious from the * ATAPI spec that that behaviour should be expected. If more * data is necessary, multiple data transfer phases will be done. */ wdccommand(chp, xfer->c_drive, ATAPI_PKT_CMD, xfer->c_bcount <= 0xffff ? xfer->c_bcount : 0xffff, 0, 0, 0, #if NATA_DMA (xfer->c_flags & C_DMA) ? ATAPI_PKT_CMD_FTRE_DMA : #endif 0 ); #if NATA_PIOBM if (xfer->c_flags & C_PIOBM) { int error; int dma_flags = (sc_xfer->xs_control & XS_CTL_DATA_IN) ? WDC_DMA_READ : 0; if (xfer->c_flags & C_POLL) { /* XXX not supported yet --- fall back to PIO */ xfer->c_flags &= ~C_PIOBM; } else { /* Init the DMA channel. */ error = (*wdc->dma_init)(wdc->dma_arg, chp->ch_channel, xfer->c_drive, (char *)xfer->c_databuf, xfer->c_bcount, dma_flags | WDC_DMA_PIOBM_ATAPI); if (error) { if (error == EINVAL) { /* * We can't do DMA on this transfer * for some reason. Fall back to * PIO. */ xfer->c_flags &= ~C_PIOBM; error = 0; } else { sc_xfer->error = XS_DRIVER_STUFFUP; errstring = "piobm"; goto error; } } } } #endif /* * If there is no interrupt for CMD input, busy-wait for it (done in * the interrupt routine. If it is a polled command, call the interrupt * routine until command is done. */ if ((sc_xfer->xs_periph->periph_cap & ATAPI_CFG_DRQ_MASK) != ATAPI_CFG_IRQ_DRQ || (sc_xfer->xs_control & XS_CTL_POLL)) { /* Wait for at last 400ns for status bit to be valid */ DELAY(1); wdc_atapi_intr(chp, xfer, 0); } else { chp->ch_flags |= ATACH_IRQ_WAIT; } if (sc_xfer->xs_control & XS_CTL_POLL) { #if NATA_DMA if (chp->ch_flags & ATACH_DMA_WAIT) { wdc_dmawait(chp, xfer, sc_xfer->timeout); chp->ch_flags &= ~ATACH_DMA_WAIT; } #endif while ((sc_xfer->xs_status & XS_STS_DONE) == 0) { /* Wait for at last 400ns for status bit to be valid */ DELAY(1); wdc_atapi_intr(chp, xfer, 0); } } return; timeout: printf("%s:%d:%d: %s timed out\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, errstring); sc_xfer->error = XS_TIMEOUT; bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); delay(10); /* some drives need a little delay here */ wdc_atapi_reset(chp, xfer); return; error: printf("%s:%d:%d: %s ", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, errstring); printf("error (0x%x)\n", chp->ch_error); sc_xfer->error = XS_SHORTSENSE; sc_xfer->sense.atapi_sense = chp->ch_error; bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); delay(10); /* some drives need a little delay here */ wdc_atapi_reset(chp, xfer); return; } static int wdc_atapi_intr(struct ata_channel *chp, struct ata_xfer *xfer, int irq) { struct atac_softc *atac = chp->ch_atac; struct wdc_softc *wdc = CHAN_TO_WDC(chp); struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; struct scsipi_xfer *sc_xfer = xfer->c_cmd; struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; int len, phase, i, retries=0; int ire; #if NATA_DMA int error; #endif #if NATA_DMA || NATA_PIOBM int dma_flags = 0; #endif void *cmd; ATADEBUG_PRINT(("wdc_atapi_intr %s:%d:%d\n", device_xname(atac->atac_dev), chp->ch_channel, drvp->drive), DEBUG_INTR); /* Is it not a transfer, but a control operation? */ if (drvp->state < READY) { printf("%s:%d:%d: bad state %d in wdc_atapi_intr\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, drvp->state); panic("wdc_atapi_intr: bad state"); } /* * If we missed an interrupt in a PIO transfer, reset and restart. * Don't try to continue transfer, we may have missed cycles. */ if ((xfer->c_flags & (C_TIMEOU | C_DMA)) == C_TIMEOU) { sc_xfer->error = XS_TIMEOUT; wdc_atapi_reset(chp, xfer); return 1; } #if NATA_PIOBM /* Transfer-done interrupt for busmastering PIO operation */ if ((xfer->c_flags & C_PIOBM) && (chp->ch_flags & ATACH_PIOBM_WAIT)) { chp->ch_flags &= ~ATACH_PIOBM_WAIT; /* restore transfer length */ len = xfer->c_bcount; if (xfer->c_lenoff < 0) len += xfer->c_lenoff; if (sc_xfer->xs_control & XS_CTL_DATA_IN) goto end_piobm_datain; else goto end_piobm_dataout; } #endif /* Ack interrupt done in wdc_wait_for_unbusy */ if (wdc->select) wdc->select(chp, xfer->c_drive); bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, WDSD_IBM | (xfer->c_drive << 4)); if (wdc_wait_for_unbusy(chp, (irq == 0) ? sc_xfer->timeout : 0, AT_POLL) == WDCWAIT_TOUT) { if (irq && (xfer->c_flags & C_TIMEOU) == 0) return 0; /* IRQ was not for us */ printf("%s:%d:%d: device timeout, c_bcount=%d, c_skip=%d\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, xfer->c_bcount, xfer->c_skip); #if NATA_DMA if (xfer->c_flags & C_DMA) { ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); } #endif sc_xfer->error = XS_TIMEOUT; wdc_atapi_reset(chp, xfer); return 1; } if (wdc->irqack) wdc->irqack(chp); #if NATA_DMA /* * If we missed an IRQ and were using DMA, flag it as a DMA error * and reset device. */ if ((xfer->c_flags & C_TIMEOU) && (xfer->c_flags & C_DMA)) { ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); sc_xfer->error = XS_RESET; wdc_atapi_reset(chp, xfer); return (1); } #endif /* * if the request sense command was aborted, report the short sense * previously recorded, else continue normal processing */ #if NATA_DMA || NATA_PIOBM if (xfer->c_flags & (C_DMA | C_PIOBM)) dma_flags = (sc_xfer->xs_control & XS_CTL_DATA_IN) ? WDC_DMA_READ : 0; #endif again: len = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_lo], 0) + 256 * bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_cyl_hi], 0); ire = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_ireason], 0); phase = (ire & (WDCI_CMD | WDCI_IN)) | (chp->ch_status & WDCS_DRQ); ATADEBUG_PRINT(("wdc_atapi_intr: c_bcount %d len %d st 0x%x err 0x%x " "ire 0x%x :", xfer->c_bcount, len, chp->ch_status, chp->ch_error, ire), DEBUG_INTR); switch (phase) { case PHASE_CMDOUT: cmd = sc_xfer->cmd; ATADEBUG_PRINT(("PHASE_CMDOUT\n"), DEBUG_INTR); #if NATA_DMA /* Init the DMA channel if necessary */ if (xfer->c_flags & C_DMA) { error = (*wdc->dma_init)(wdc->dma_arg, chp->ch_channel, xfer->c_drive, xfer->c_databuf, xfer->c_bcount, dma_flags); if (error) { if (error == EINVAL) { /* * We can't do DMA on this transfer * for some reason. Fall back to * PIO. */ xfer->c_flags &= ~C_DMA; error = 0; } else { sc_xfer->error = XS_DRIVER_STUFFUP; break; } } } #endif /* send packet command */ /* Commands are 12 or 16 bytes long. It's 32-bit aligned */ wdc->dataout_pio(chp, drvp->drive_flags, cmd, sc_xfer->cmdlen); #if NATA_DMA /* Start the DMA channel if necessary */ if (xfer->c_flags & C_DMA) { (*wdc->dma_start)(wdc->dma_arg, chp->ch_channel, xfer->c_drive); chp->ch_flags |= ATACH_DMA_WAIT; } #endif if ((sc_xfer->xs_control & XS_CTL_POLL) == 0) { chp->ch_flags |= ATACH_IRQ_WAIT; } return 1; case PHASE_DATAOUT: /* write data */ ATADEBUG_PRINT(("PHASE_DATAOUT\n"), DEBUG_INTR); #if NATA_DMA if ((sc_xfer->xs_control & XS_CTL_DATA_OUT) == 0 || (xfer->c_flags & C_DMA) != 0) { printf("wdc_atapi_intr: bad data phase DATAOUT\n"); if (xfer->c_flags & C_DMA) { ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); } sc_xfer->error = XS_TIMEOUT; wdc_atapi_reset(chp, xfer); return 1; } #endif xfer->c_lenoff = len - xfer->c_bcount; if (xfer->c_bcount < len) { printf("wdc_atapi_intr: warning: write only " "%d of %d requested bytes\n", xfer->c_bcount, len); len = xfer->c_bcount; } #if NATA_PIOBM if (xfer->c_flags & C_PIOBM) { /* start the busmastering PIO */ (*wdc->piobm_start)(wdc->dma_arg, chp->ch_channel, xfer->c_drive, xfer->c_skip, len, WDC_PIOBM_XFER_IRQ); chp->ch_flags |= ATACH_DMA_WAIT | ATACH_IRQ_WAIT | ATACH_PIOBM_WAIT; return 1; } #endif wdc->dataout_pio(chp, drvp->drive_flags, (char *)xfer->c_databuf + xfer->c_skip, len); #if NATA_PIOBM end_piobm_dataout: #endif for (i = xfer->c_lenoff; i > 0; i -= 2) bus_space_write_2(wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0, 0); xfer->c_skip += len; xfer->c_bcount -= len; if ((sc_xfer->xs_control & XS_CTL_POLL) == 0) { chp->ch_flags |= ATACH_IRQ_WAIT; } return 1; case PHASE_DATAIN: /* Read data */ ATADEBUG_PRINT(("PHASE_DATAIN\n"), DEBUG_INTR); #if NATA_DMA if ((sc_xfer->xs_control & XS_CTL_DATA_IN) == 0 || (xfer->c_flags & C_DMA) != 0) { printf("wdc_atapi_intr: bad data phase DATAIN\n"); if (xfer->c_flags & C_DMA) { ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); } sc_xfer->error = XS_TIMEOUT; wdc_atapi_reset(chp, xfer); return 1; } #endif xfer->c_lenoff = len - xfer->c_bcount; if (xfer->c_bcount < len) { printf("wdc_atapi_intr: warning: reading only " "%d of %d bytes\n", xfer->c_bcount, len); len = xfer->c_bcount; } #if NATA_PIOBM if (xfer->c_flags & C_PIOBM) { /* start the busmastering PIO */ (*wdc->piobm_start)(wdc->dma_arg, chp->ch_channel, xfer->c_drive, xfer->c_skip, len, WDC_PIOBM_XFER_IRQ); chp->ch_flags |= ATACH_DMA_WAIT | ATACH_IRQ_WAIT | ATACH_PIOBM_WAIT; return 1; } #endif wdc->datain_pio(chp, drvp->drive_flags, (char *)xfer->c_databuf + xfer->c_skip, len); #if NATA_PIOBM end_piobm_datain: #endif if (xfer->c_lenoff > 0) wdcbit_bucket(chp, len - xfer->c_bcount); xfer->c_skip += len; xfer->c_bcount -= len; if ((sc_xfer->xs_control & XS_CTL_POLL) == 0) { chp->ch_flags |= ATACH_IRQ_WAIT; } return 1; case PHASE_ABORTED: case PHASE_COMPLETED: ATADEBUG_PRINT(("PHASE_COMPLETED\n"), DEBUG_INTR); #if NATA_DMA if (xfer->c_flags & C_DMA) { xfer->c_bcount -= sc_xfer->datalen; } #endif sc_xfer->resid = xfer->c_bcount; wdc_atapi_phase_complete(xfer); return(1); default: if (++retries<500) { DELAY(100); chp->ch_status = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_status], 0); chp->ch_error = bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_error], 0); goto again; } printf("wdc_atapi_intr: unknown phase 0x%x\n", phase); if (chp->ch_status & WDCS_ERR) { sc_xfer->error = XS_SHORTSENSE; sc_xfer->sense.atapi_sense = chp->ch_error; } else { #if NATA_DMA if (xfer->c_flags & C_DMA) { ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); } #endif sc_xfer->error = XS_RESET; wdc_atapi_reset(chp, xfer); return (1); } } ATADEBUG_PRINT(("wdc_atapi_intr: wdc_atapi_done() (end), error 0x%x " "sense 0x%x\n", sc_xfer->error, sc_xfer->sense.atapi_sense), DEBUG_INTR); wdc_atapi_done(chp, xfer); return (1); } static void wdc_atapi_phase_complete(struct ata_xfer *xfer) { struct ata_channel *chp = xfer->c_chp; struct atac_softc *atac = chp->ch_atac; #if NATA_DMA || NATA_PIOBM struct wdc_softc *wdc = CHAN_TO_WDC(chp); #endif struct scsipi_xfer *sc_xfer = xfer->c_cmd; struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; /* wait for DSC if needed */ if (drvp->drive_flags & DRIVE_ATAPIST) { ATADEBUG_PRINT(("wdc_atapi_phase_complete(%s:%d:%d) " "polldsc %d\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, xfer->c_dscpoll), DEBUG_XFERS); #if 1 if (cold) panic("wdc_atapi_phase_complete: cold"); #endif if (wdcwait(chp, WDCS_DSC, WDCS_DSC, 10, AT_POLL) == WDCWAIT_TOUT) { /* 10ms not enough, try again in 1 tick */ if (xfer->c_dscpoll++ > mstohz(sc_xfer->timeout)) { printf("%s:%d:%d: wait_for_dsc " "failed\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive); sc_xfer->error = XS_TIMEOUT; wdc_atapi_reset(chp, xfer); return; } else callout_reset(&chp->ch_callout, 1, wdc_atapi_polldsc, xfer); return; } } /* * Some drive occasionally set WDCS_ERR with * "ATA illegal length indication" in the error * register. If we read some data the sense is valid * anyway, so don't report the error. */ if (chp->ch_status & WDCS_ERR && ((sc_xfer->xs_control & XS_CTL_REQSENSE) == 0 || sc_xfer->resid == sc_xfer->datalen)) { /* save the short sense */ sc_xfer->error = XS_SHORTSENSE; sc_xfer->sense.atapi_sense = chp->ch_error; if ((sc_xfer->xs_periph->periph_quirks & PQUIRK_NOSENSE) == 0) { /* ask scsipi to send a REQUEST_SENSE */ sc_xfer->error = XS_BUSY; sc_xfer->status = SCSI_CHECK; } #if NATA_DMA || NATA_PIOBM else if (wdc->dma_status & (WDC_DMAST_NOIRQ | WDC_DMAST_ERR)) { #if NATA_DMA ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); #endif sc_xfer->error = XS_RESET; wdc_atapi_reset(chp, xfer); return; } #endif } if (xfer->c_bcount != 0) { ATADEBUG_PRINT(("wdc_atapi_intr: bcount value is " "%d after io\n", xfer->c_bcount), DEBUG_XFERS); } #ifdef DIAGNOSTIC if (xfer->c_bcount < 0) { printf("wdc_atapi_intr warning: bcount value " "is %d after io\n", xfer->c_bcount); } #endif ATADEBUG_PRINT(("wdc_atapi_phase_complete: wdc_atapi_done(), " "error 0x%x sense 0x%x\n", sc_xfer->error, sc_xfer->sense.atapi_sense), DEBUG_INTR); wdc_atapi_done(chp, xfer); } static void wdc_atapi_done(struct ata_channel *chp, struct ata_xfer *xfer) { struct atac_softc *atac = chp->ch_atac; struct scsipi_xfer *sc_xfer = xfer->c_cmd; int drive = xfer->c_drive; ATADEBUG_PRINT(("wdc_atapi_done %s:%d:%d: flags 0x%x\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, (u_int)xfer->c_flags), DEBUG_XFERS); callout_stop(&chp->ch_callout); /* mark controller inactive and free the command */ chp->ch_queue->active_xfer = NULL; ata_free_xfer(chp, xfer); if (chp->ch_drive[drive].drive_flags & DRIVE_WAITDRAIN) { sc_xfer->error = XS_DRIVER_STUFFUP; chp->ch_drive[drive].drive_flags &= ~DRIVE_WAITDRAIN; wakeup(&chp->ch_queue->active_xfer); } ATADEBUG_PRINT(("wdc_atapi_done: scsipi_done\n"), DEBUG_XFERS); scsipi_done(sc_xfer); ATADEBUG_PRINT(("atastart from wdc_atapi_done, flags 0x%x\n", chp->ch_flags), DEBUG_XFERS); atastart(chp); } static void wdc_atapi_reset(struct ata_channel *chp, struct ata_xfer *xfer) { struct atac_softc *atac = chp->ch_atac; struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; struct scsipi_xfer *sc_xfer = xfer->c_cmd; wdccommandshort(chp, xfer->c_drive, ATAPI_SOFT_RESET); drvp->state = 0; if (wdc_wait_for_unbusy(chp, WDC_RESET_WAIT, AT_POLL) != 0) { printf("%s:%d:%d: reset failed\n", device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive); sc_xfer->error = XS_SELTIMEOUT; } wdc_atapi_done(chp, xfer); return; } static void wdc_atapi_polldsc(void *arg) { wdc_atapi_phase_complete(arg); }