/*- * Copyright (c) 1998 - 2005 Søren Schmidt * 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, * without modification, immediately at the beginning of the file. * 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * 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 __FBSDID("$FreeBSD$"); #include "opt_ata.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __alpha__ #include #endif #include #include #include /* device structure */ static d_ioctl_t ata_ioctl; static struct cdevsw ata_cdevsw = { .d_version = D_VERSION, .d_flags = D_NEEDGIANT, /* we need this as newbus isn't safe */ .d_ioctl = ata_ioctl, .d_name = "ata", }; /* prototypes */ static void ata_interrupt(void *); static void ata_boot_attach(void); device_t ata_add_child(device_t parent, struct ata_device *atadev, int unit); static int ata_identify(device_t dev); /* global vars */ MALLOC_DEFINE(M_ATA, "ATA generic", "ATA driver generic layer"); int (*ata_ioctl_func)(struct ata_cmd *iocmd) = NULL; devclass_t ata_devclass; uma_zone_t ata_zone; int ata_wc = 1; /* local vars */ static struct intr_config_hook *ata_delayed_attach = NULL; static int ata_dma = 1; static int atapi_dma = 1; /* sysctl vars */ SYSCTL_NODE(_hw, OID_AUTO, ata, CTLFLAG_RD, 0, "ATA driver parameters"); TUNABLE_INT("hw.ata.ata_dma", &ata_dma); SYSCTL_INT(_hw_ata, OID_AUTO, ata_dma, CTLFLAG_RDTUN, &ata_dma, 0, "ATA disk DMA mode control"); TUNABLE_INT("hw.ata.atapi_dma", &atapi_dma); SYSCTL_INT(_hw_ata, OID_AUTO, atapi_dma, CTLFLAG_RDTUN, &atapi_dma, 0, "ATAPI device DMA mode control"); TUNABLE_INT("hw.ata.wc", &ata_wc); SYSCTL_INT(_hw_ata, OID_AUTO, wc, CTLFLAG_RDTUN, &ata_wc, 0, "ATA disk write caching"); /* * newbus device interface related functions */ int ata_probe(device_t dev) { return 0; } int ata_attach(device_t dev) { struct ata_channel *ch = device_get_softc(dev); int error, rid; /* check that we have a virgin channel to attach */ if (ch->r_irq) return EEXIST; /* initialize the softc basics */ ch->dev = dev; ch->state = ATA_IDLE; bzero(&ch->state_mtx, sizeof(struct mtx)); mtx_init(&ch->state_mtx, "ATA state lock", NULL, MTX_DEF); bzero(&ch->queue_mtx, sizeof(struct mtx)); mtx_init(&ch->queue_mtx, "ATA queue lock", NULL, MTX_DEF); TAILQ_INIT(&ch->ata_queue); /* reset the controller HW, the channel and device(s) */ while (ATA_LOCKING(dev, ATA_LF_LOCK) != ch->unit) tsleep(&error, PRIBIO, "ataatch", 1); ch->hw.reset(ch); ATA_LOCKING(dev, ATA_LF_UNLOCK); /* setup interrupt delivery */ rid = ATA_IRQ_RID; ch->r_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE); if (!ch->r_irq) { device_printf(dev, "unable to allocate interrupt\n"); return ENXIO; } if ((error = bus_setup_intr(dev, ch->r_irq, ATA_INTR_FLAGS, ata_interrupt, ch, &ch->ih))) { device_printf(dev, "unable to setup interrupt\n"); return error; } /* do not attach devices if we are in early boot */ if (ata_delayed_attach) return 0; /* probe and attach devices on this channel */ ata_identify(dev); return 0; } int ata_detach(device_t dev) { struct ata_channel *ch = device_get_softc(dev); device_t *children; int nchildren, i; /* check that we have a vaild channel to detach */ if (!ch->r_irq) return ENXIO; /* detach & delete all children */ if (!device_get_children(dev, &children, &nchildren)) { for (i = 0; i < nchildren; i++) if (children[i]) device_delete_child(dev, children[i]); free(children, M_TEMP); } /* release resources */ bus_teardown_intr(dev, ch->r_irq, ch->ih); bus_release_resource(dev, SYS_RES_IRQ, ATA_IRQ_RID, ch->r_irq); ch->r_irq = NULL; mtx_destroy(&ch->state_mtx); mtx_destroy(&ch->queue_mtx); return 0; } int ata_reinit(device_t dev) { struct ata_channel *ch = device_get_softc(dev); device_t *children; int nchildren, i; if (!ch || !ch->r_irq) return ENXIO; if (bootverbose) device_printf(dev, "reiniting channel ..\n"); /* poll for locking the channel */ while (ATA_LOCKING(dev, ATA_LF_LOCK) != ch->unit) tsleep(&dev, PRIBIO, "atarini", 1); /* grap the channel lock */ mtx_lock(&ch->state_mtx); ch->state = ATA_STALL_QUEUE; mtx_unlock(&ch->state_mtx); /* reset the controller HW, the channel and device(s) */ ch->hw.reset(ch); /* reinit the children and delete any that fails */ if (!device_get_children(dev, &children, &nchildren)) { mtx_lock(&Giant); /* newbus suckage it needs Giant */ for (i = 0; i < nchildren; i++) { if (children[i] && device_is_attached(children[i])) if (ATA_REINIT(children[i])) { if (ch->running->dev == children[i]) { device_printf(ch->running->dev, "FAILURE - device detached\n"); ch->running->dev = NULL; ch->running = NULL; } device_delete_child(dev, children[i]); } } free(children, M_TEMP); mtx_unlock(&Giant); /* newbus suckage dealt with, release Giant */ } /* catch running request if any */ ata_catch_inflight(ch); /* we're done release the channel for new work */ mtx_lock(&ch->state_mtx); ch->state = ATA_IDLE; mtx_unlock(&ch->state_mtx); ATA_LOCKING(dev, ATA_LF_UNLOCK); if (bootverbose) device_printf(dev, "reinit done ..\n"); /* kick off requests on the queue */ ata_start(dev); return 0; } int ata_suspend(device_t dev) { struct ata_channel *ch; if (!dev || !(ch = device_get_softc(dev))) return ENXIO; /* wait for the channel to be IDLE before when enter suspend mode */ while (1) { mtx_lock(&ch->state_mtx); if (ch->state == ATA_IDLE) { ch->state = ATA_ACTIVE; mtx_unlock(&ch->state_mtx); break; } mtx_unlock(&ch->state_mtx); tsleep(ch, PRIBIO, "atasusp", hz/10); } ATA_LOCKING(dev, ATA_LF_UNLOCK); return 0; } int ata_resume(device_t dev) { struct ata_channel *ch; int error; if (!dev || !(ch = device_get_softc(dev))) return ENXIO; /* reinit the devices, we dont know what mode/state they have */ error = ata_reinit(dev); /* kick off requests on the queue */ ata_start(dev); return error; } static void ata_interrupt(void *data) { struct ata_channel *ch = (struct ata_channel *)data; struct ata_request *request; mtx_lock(&ch->state_mtx); do { /* do we have a running request */ if (ch->state & ATA_TIMEOUT || !(request = ch->running)) break; ATA_DEBUG_RQ(request, "interrupt"); /* ignore interrupt if device is busy */ if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) { DELAY(100); if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) break; } /* check for the right state */ if (ch->state == ATA_ACTIVE || ch->state == ATA_STALL_QUEUE) { request->flags |= ATA_R_INTR_SEEN; } else { device_printf(request->dev, "interrupt state=%d unexpected\n", ch->state); break; } /* * we have the HW locks, so start the tranaction for this request * if it finishes immediately we dont need to wait for interrupt */ if (ch->hw.end_transaction(request) == ATA_OP_FINISHED) { ch->running = NULL; if (ch->state == ATA_ACTIVE) ch->state = ATA_IDLE; mtx_unlock(&ch->state_mtx); ATA_LOCKING(ch->dev, ATA_LF_UNLOCK); ata_finish(request); return; } else { request->flags &= ~ATA_R_INTR_SEEN; } } while (0); mtx_unlock(&ch->state_mtx); } /* * device related interfaces */ static int ata_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int32_t flag, struct thread *td) { struct ata_cmd *iocmd = (struct ata_cmd *)addr; device_t *children, device = NULL; struct ata_request *request; caddr_t buf; int nchildren, i; int error = ENOTTY; if (cmd != IOCATA) return ENOTSUP; if (iocmd->cmd == ATAGMAXCHANNEL) { iocmd->u.maxchan = devclass_get_maxunit(ata_devclass); return 0; } if (iocmd->channel < 0 || iocmd->channel >= devclass_get_maxunit(ata_devclass)) { return ENXIO; } if (!(device = devclass_get_device(ata_devclass, iocmd->channel))) return ENXIO; switch (iocmd->cmd) { case ATAGPARM: if (!device_get_children(device, &children, &nchildren)) { struct ata_channel *ch; if (!(ch = device_get_softc(device))) return ENXIO; iocmd->u.param.type[0] = ch->devices & (ATA_ATA_MASTER | ATA_ATAPI_MASTER); iocmd->u.param.type[1] = ch->devices & (ATA_ATA_SLAVE | ATA_ATAPI_SLAVE); for (i = 0; i < nchildren; i++) { if (children[i] && device_is_attached(children[i])) { struct ata_device *atadev = device_get_softc(children[i]); if (atadev->unit == ATA_MASTER) { strcpy(iocmd->u.param.name[0], device_get_nameunit(children[i])); bcopy(&atadev->param, &iocmd->u.param.params[0], sizeof(struct ata_params)); } if (atadev->unit == ATA_SLAVE) { strcpy(iocmd->u.param.name[1], device_get_nameunit(children[i])); bcopy(&atadev->param, &iocmd->u.param.params[1], sizeof(struct ata_params)); } } } free(children, M_TEMP); error = 0; } else error = ENXIO; break; case ATAGMODE: if (!device_get_children(device, &children, &nchildren)) { for (i = 0; i < nchildren; i++) { if (children[i] && device_is_attached(children[i])) { struct ata_device *atadev = device_get_softc(children[i]); atadev = device_get_softc(children[i]); if (atadev->unit == ATA_MASTER) iocmd->u.mode.mode[0] = atadev->mode; if (atadev->unit == ATA_SLAVE) iocmd->u.mode.mode[1] = atadev->mode; } free(children, M_TEMP); } error = 0; } else error = ENXIO; break; case ATASMODE: if (!device_get_children(device, &children, &nchildren)) { for (i = 0; i < nchildren; i++) { if (children[i] && device_is_attached(children[i])) { struct ata_device *atadev = device_get_softc(children[i]); if (atadev->unit == ATA_MASTER) { atadev->mode = iocmd->u.mode.mode[0]; ATA_SETMODE(device, children[i]); iocmd->u.mode.mode[0] = atadev->mode; } if (atadev->unit == ATA_SLAVE) { atadev->mode = iocmd->u.mode.mode[1]; ATA_SETMODE(device, children[i]); iocmd->u.mode.mode[1] = atadev->mode; } } } free(children, M_TEMP); error = 0; } else error = ENXIO; break; case ATAREQUEST: if (!device_get_children(device, &children, &nchildren)) { for (i = 0; i < nchildren; i++) { if (children[i] && device_is_attached(children[i])) { struct ata_device *atadev = device_get_softc(children[i]); if (ATA_DEV(atadev->unit) == iocmd->device) { if (!(buf = malloc(iocmd->u.request.count, M_ATA, M_NOWAIT))) { error = ENOMEM; break; } if (!(request = ata_alloc_request())) { error = ENOMEM; free(buf, M_ATA); break; } if (iocmd->u.request.flags & ATA_CMD_WRITE) { error = copyin(iocmd->u.request.data, buf, iocmd->u.request.count); if (error) { free(buf, M_ATA); ata_free_request(request); break; } } request->dev = atadev->dev; if (iocmd->u.request.flags & ATA_CMD_ATAPI) { request->flags = ATA_R_ATAPI; bcopy(iocmd->u.request.u.atapi.ccb, request->u.atapi.ccb, 16); } else { request->u.ata.command = iocmd->u.request.u.ata.command; request->u.ata.feature = iocmd->u.request.u.ata.feature; request->u.ata.lba = iocmd->u.request.u.ata.lba; request->u.ata.count = iocmd->u.request.u.ata.count; } request->timeout = iocmd->u.request.timeout; request->data = buf; request->bytecount = iocmd->u.request.count; request->transfersize = request->bytecount; if (iocmd->u.request.flags & ATA_CMD_CONTROL) request->flags |= ATA_R_CONTROL; if (iocmd->u.request.flags & ATA_CMD_READ) request->flags |= ATA_R_READ; if (iocmd->u.request.flags & ATA_CMD_WRITE) request->flags |= ATA_R_WRITE; ata_queue_request(request); if (!(request->flags & ATA_R_ATAPI)) { iocmd->u.request.u.ata.command = request->u.ata.command; iocmd->u.request.u.ata.feature = request->u.ata.feature; iocmd->u.request.u.ata.lba = request->u.ata.lba; iocmd->u.request.u.ata.count = request->u.ata.count; } iocmd->u.request.error = request->result; if (iocmd->u.request.flags & ATA_CMD_READ) error = copyout(buf, iocmd->u.request.data, iocmd->u.request.count); else error = 0; free(buf, M_ATA); ata_free_request(request); break; } } } free(children, M_TEMP); } else error = ENXIO; break; case ATAREINIT: error = ata_reinit(device); ata_start(device); break; case ATAATTACH: /* SOS should enable channel HW on controller XXX */ error = ata_attach(device); break; case ATADETACH: error = ata_detach(device); /* SOS should disable channel HW on controller XXX */ break; default: if (ata_ioctl_func) error = ata_ioctl_func(iocmd); } return error; } static void ata_boot_attach(void) { struct ata_channel *ch; int ctlr; /* release the hook that got us here, only needed during boot */ if (ata_delayed_attach) { config_intrhook_disestablish(ata_delayed_attach); free(ata_delayed_attach, M_TEMP); ata_delayed_attach = NULL; } /* kick of probe and attach on all channels */ for (ctlr = 0; ctlr < devclass_get_maxunit(ata_devclass); ctlr++) { if ((ch = devclass_get_softc(ata_devclass, ctlr))) { ata_identify(ch->dev); } } } /* * misc support functions */ device_t ata_add_child(device_t parent, struct ata_device *atadev, int unit) { struct ata_channel *ch = device_get_softc(parent); device_t child; if ((child = device_add_child(parent, NULL, unit))) { char buffer[64]; device_set_softc(child, atadev); sprintf(buffer, "%.40s/%.8s", atadev->param.model, atadev->param.revision); device_set_desc_copy(child, buffer); device_quiet(child); atadev->dev = child; atadev->max_iosize = DEV_BSIZE; atadev->mode = ATA_PIO_MAX; if (atadev->param.config & ATA_PROTO_ATAPI) { if (atapi_dma && ch->dma && (atadev->param.config & ATA_DRQ_MASK) != ATA_DRQ_INTR && ata_umode(&atadev->param) >= ATA_UDMA2) atadev->mode = ATA_DMA_MAX; } else { if (ata_dma && ch->dma) atadev->mode = ATA_DMA_MAX; } } return child; } static int ata_identify(device_t dev) { struct ata_channel *ch = device_get_softc(dev); struct ata_device *master, *slave; int master_res = EIO, slave_res = EIO, master_unit = -1, slave_unit = -1; if (!(master = malloc(sizeof(struct ata_device), M_ATA, M_NOWAIT | M_ZERO))) { device_printf(dev, "out of memory\n"); return ENOMEM; } master->unit = ATA_MASTER; if (!(slave = malloc(sizeof(struct ata_device), M_ATA, M_NOWAIT | M_ZERO))) { free(master, M_ATA); device_printf(dev, "out of memory\n"); return ENOMEM; } slave->unit = ATA_SLAVE; /* wait for the channel to be IDLE then grab it before touching HW */ while (ATA_LOCKING(dev, ATA_LF_LOCK) != ch->unit) tsleep(ch, PRIBIO, "ataidnt1", 1); while (1) { mtx_lock(&ch->state_mtx); if (ch->state == ATA_IDLE) { ch->state = ATA_ACTIVE; mtx_unlock(&ch->state_mtx); break; } mtx_unlock(&ch->state_mtx); tsleep(ch, PRIBIO, "ataidnt2", 1); } if (ch->devices & ATA_ATA_SLAVE) { slave_res = ata_getparam(dev, slave, ATA_ATA_IDENTIFY); #ifdef ATA_STATIC_ID slave_unit = (device_get_unit(dev) << 1) + 1; #endif } else if (ch->devices & ATA_ATAPI_SLAVE) slave_res = ata_getparam(dev, slave, ATA_ATAPI_IDENTIFY); if (ch->devices & ATA_ATA_MASTER) { master_res = ata_getparam(dev, master, ATA_ATA_IDENTIFY); #ifdef ATA_STATIC_ID master_unit = (device_get_unit(dev) << 1); #endif } else if (ch->devices & ATA_ATAPI_MASTER) master_res = ata_getparam(dev, master, ATA_ATAPI_IDENTIFY); if (master_res || !ata_add_child(dev, master, master_unit)) free(master, M_ATA); if (slave_res || !ata_add_child(dev, slave, slave_unit)) free(slave, M_ATA); mtx_lock(&ch->state_mtx); ch->state = ATA_IDLE; mtx_unlock(&ch->state_mtx); ATA_LOCKING(dev, ATA_LF_UNLOCK); bus_generic_probe(dev); bus_generic_attach(dev); return 0; } void ata_default_registers(struct ata_channel *ch) { /* fill in the defaults from whats setup already */ ch->r_io[ATA_ERROR].res = ch->r_io[ATA_FEATURE].res; ch->r_io[ATA_ERROR].offset = ch->r_io[ATA_FEATURE].offset; ch->r_io[ATA_IREASON].res = ch->r_io[ATA_COUNT].res; ch->r_io[ATA_IREASON].offset = ch->r_io[ATA_COUNT].offset; ch->r_io[ATA_STATUS].res = ch->r_io[ATA_COMMAND].res; ch->r_io[ATA_STATUS].offset = ch->r_io[ATA_COMMAND].offset; ch->r_io[ATA_ALTSTAT].res = ch->r_io[ATA_CONTROL].res; ch->r_io[ATA_ALTSTAT].offset = ch->r_io[ATA_CONTROL].offset; } void ata_udelay(int interval) { /* for now just use DELAY, the timer/sleep subsytems are not there yet */ if (1 || interval < (1000000/hz) || ata_delayed_attach) DELAY(interval); else tsleep(&interval, PRIBIO, "ataslp", interval/(1000000/hz)); } char * ata_mode2str(int mode) { switch (mode) { case ATA_PIO0: return "PIO0"; case ATA_PIO1: return "PIO1"; case ATA_PIO2: return "PIO2"; case ATA_PIO3: return "PIO3"; case ATA_PIO4: return "PIO4"; case ATA_WDMA0: return "WDMA0"; case ATA_WDMA1: return "WDMA1"; case ATA_WDMA2: return "WDMA2"; case ATA_UDMA0: return "UDMA16"; case ATA_UDMA1: return "UDMA25"; case ATA_UDMA2: return "UDMA33"; case ATA_UDMA3: return "UDMA40"; case ATA_UDMA4: return "UDMA66"; case ATA_UDMA5: return "UDMA100"; case ATA_UDMA6: return "UDMA133"; case ATA_SA150: return "SATA150"; default: if (mode & ATA_DMA_MASK) return "BIOSDMA"; else return "BIOSPIO"; } } int ata_pmode(struct ata_params *ap) { if (ap->atavalid & ATA_FLAG_64_70) { if (ap->apiomodes & 0x02) return ATA_PIO4; if (ap->apiomodes & 0x01) return ATA_PIO3; } if (ap->mwdmamodes & 0x04) return ATA_PIO4; if (ap->mwdmamodes & 0x02) return ATA_PIO3; if (ap->mwdmamodes & 0x01) return ATA_PIO2; if ((ap->retired_piomode & ATA_RETIRED_PIO_MASK) == 0x200) return ATA_PIO2; if ((ap->retired_piomode & ATA_RETIRED_PIO_MASK) == 0x100) return ATA_PIO1; if ((ap->retired_piomode & ATA_RETIRED_PIO_MASK) == 0x000) return ATA_PIO0; return ATA_PIO0; } int ata_wmode(struct ata_params *ap) { if (ap->mwdmamodes & 0x04) return ATA_WDMA2; if (ap->mwdmamodes & 0x02) return ATA_WDMA1; if (ap->mwdmamodes & 0x01) return ATA_WDMA0; return -1; } int ata_umode(struct ata_params *ap) { if (ap->atavalid & ATA_FLAG_88) { if (ap->udmamodes & 0x40) return ATA_UDMA6; if (ap->udmamodes & 0x20) return ATA_UDMA5; if (ap->udmamodes & 0x10) return ATA_UDMA4; if (ap->udmamodes & 0x08) return ATA_UDMA3; if (ap->udmamodes & 0x04) return ATA_UDMA2; if (ap->udmamodes & 0x02) return ATA_UDMA1; if (ap->udmamodes & 0x01) return ATA_UDMA0; } return -1; } int ata_limit_mode(struct ata_device *atadev, int mode, int maxmode) { if (maxmode && mode > maxmode) mode = maxmode; if (mode >= ATA_UDMA0 && ata_umode(&atadev->param) > 0) return min(mode, ata_umode(&atadev->param)); if (mode >= ATA_WDMA0 && ata_wmode(&atadev->param) > 0) return min(mode, ata_wmode(&atadev->param)); if (mode > ata_pmode(&atadev->param)) return min(mode, ata_pmode(&atadev->param)); return mode; } /* * module handeling */ static int ata_module_event_handler(module_t mod, int what, void *arg) { static struct cdev *atacdev; switch (what) { case MOD_LOAD: /* register controlling device */ atacdev = make_dev(&ata_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "ata"); if (cold) { /* register boot attach to be run when interrupts are enabled */ if (!(ata_delayed_attach = (struct intr_config_hook *) malloc(sizeof(struct intr_config_hook), M_TEMP, M_NOWAIT | M_ZERO))) { printf("ata: malloc of delayed attach hook failed\n"); return EIO; } ata_delayed_attach->ich_func = (void*)ata_boot_attach; if (config_intrhook_establish(ata_delayed_attach) != 0) { printf("ata: config_intrhook_establish failed\n"); free(ata_delayed_attach, M_TEMP); } } return 0; case MOD_UNLOAD: /* deregister controlling device */ destroy_dev(atacdev); return 0; default: return EOPNOTSUPP; } } static moduledata_t ata_moduledata = { "ata", ata_module_event_handler, NULL }; DECLARE_MODULE(ata, ata_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); MODULE_VERSION(ata, 1); static void ata_init(void) { /* init our UMA zone for ATA requests */ ata_zone = uma_zcreate("ata_request", sizeof(struct ata_request), NULL, NULL, NULL, NULL, 0, 0); } SYSINIT(atadev, SI_SUB_DRIVERS, SI_ORDER_SECOND, ata_init, NULL)