/*- * Copyright (c) 2000 Michael Smith * Copyright (c) 2000 BSDi * 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. */ /*- * Copyright (c) 2002 Eric Moore * Copyright (c) 2002 LSI Logic Corporation * 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. * 3. The party using or redistributing the source code and binary forms * agrees to the disclaimer below and the terms and conditions set forth * herein. * * 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. * * $FreeBSD: src/sys/dev/amr/amr_cam.c,v 1.29 2011/11/07 06:44:47 ed Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int amr_cam_probe(device_t dev); static int amr_cam_attach(device_t dev); static int amr_cam_detach(device_t dev); static void amr_cam_action(struct cam_sim *sim, union ccb *ccb); static void amr_cam_poll(struct cam_sim *sim); static void amr_cam_complete(struct amr_command *ac); static int amr_cam_command(struct amr_softc *sc, struct amr_command **acp); static devclass_t amr_pass_devclass; static device_method_t amr_pass_methods[] = { DEVMETHOD(device_probe, amr_cam_probe), DEVMETHOD(device_attach, amr_cam_attach), DEVMETHOD(device_detach, amr_cam_detach), DEVMETHOD_END }; static driver_t amr_pass_driver = { "amrp", amr_pass_methods, 0 }; DRIVER_MODULE(amrp, amr, amr_pass_driver, amr_pass_devclass, NULL, NULL); MODULE_VERSION(amrp, 1); MODULE_DEPEND(amrp, amr, 1, 1, 1); MODULE_DEPEND(amrp, cam, 1, 1, 1); /*********************************************************************** * Enqueue/dequeue functions */ static __inline void amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb) { TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe); } static __inline void amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb) { TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe); } static __inline union ccb * amr_dequeue_ccb(struct amr_softc *sc) { union ccb *ccb; if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL) TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe); return(ccb); } static int amr_cam_probe(device_t dev) { return (0); } /******************************************************************************** * Attach our 'real' SCSI channels to CAM */ static int amr_cam_attach(device_t dev) { struct amr_softc *sc; struct cam_devq *devq; int chn, error; sc = device_get_softc(dev); /* initialise the ccb queue */ TAILQ_INIT(&sc->amr_cam_ccbq); /* * Allocate a devq for all our channels combined. This should * allow for the maximum number of SCSI commands we will accept * at one time. Save the pointer in the softc so we can find it later * during detach. */ if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL) return(ENOMEM); sc->amr_cam_devq = devq; /* * Iterate over our channels, registering them with CAM */ for (chn = 0; chn < sc->amr_maxchan; chn++) { /* allocate a sim */ if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action, amr_cam_poll, "amr", sc, device_get_unit(sc->amr_dev), &sc->amr_list_lock, 1, AMR_MAX_SCSI_CMDS, devq)) == NULL) { cam_simq_release(devq); device_printf(sc->amr_dev, "CAM SIM attach failed\n"); return(ENOMEM); } /* register the bus ID so we can get it later */ lockmgr(&sc->amr_list_lock, LK_EXCLUSIVE); error = xpt_bus_register(sc->amr_cam_sim[chn], chn); lockmgr(&sc->amr_list_lock, LK_RELEASE); if (error) { device_printf(sc->amr_dev, "CAM XPT bus registration failed\n"); return(ENXIO); } } /* * XXX we should scan the config and work out which devices are * actually protected. */ sc->amr_cam_command = amr_cam_command; return(0); } /******************************************************************************** * Disconnect ourselves from CAM */ static int amr_cam_detach(device_t dev) { struct amr_softc *sc; int chn; sc = device_get_softc(dev); lockmgr(&sc->amr_list_lock, LK_EXCLUSIVE); for (chn = 0; chn < sc->amr_maxchan; chn++) { /* * If a sim was allocated for this channel, free it */ if (sc->amr_cam_sim[chn] != NULL) { xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn])); cam_sim_free(sc->amr_cam_sim[chn]); } } lockmgr(&sc->amr_list_lock, LK_RELEASE); /* Now free the devq */ if (sc->amr_cam_devq != NULL) cam_simq_release(sc->amr_cam_devq); return (0); } /*********************************************************************** *********************************************************************** CAM passthrough interface *********************************************************************** ***********************************************************************/ /*********************************************************************** * Handle a request for action from CAM */ static void amr_cam_action(struct cam_sim *sim, union ccb *ccb) { struct amr_softc *sc = cam_sim_softc(sim); switch(ccb->ccb_h.func_code) { /* * Perform SCSI I/O to a physical device. */ case XPT_SCSI_IO: { struct ccb_hdr *ccbh = &ccb->ccb_h; struct ccb_scsiio *csio = &ccb->csio; /* Validate the CCB */ ccbh->status = CAM_REQ_INPROG; /* check the CDB length */ if (csio->cdb_len > AMR_MAX_EXTCDB_LEN) ccbh->status = CAM_REQ_INVALID; if ((csio->cdb_len > AMR_MAX_CDB_LEN) && (sc->support_ext_cdb == 0)) ccbh->status = CAM_REQ_INVALID; /* check that the CDB pointer is not to a physical address */ if ((ccbh->flags & CAM_CDB_POINTER) && (ccbh->flags & CAM_CDB_PHYS)) ccbh->status = CAM_REQ_INVALID; /* * if there is data transfer, it must be to/from a virtual * address */ if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) { if (ccbh->flags & CAM_DATA_PHYS) /* we can't map it */ ccbh->status = CAM_REQ_INVALID; if (ccbh->flags & CAM_SCATTER_VALID) /* we want to do the s/g setup */ ccbh->status = CAM_REQ_INVALID; } /* * If the command is to a LUN other than 0, fail it. * This is probably incorrect, but during testing the * firmware did not seem to respect the LUN field, and thus * devices appear echoed. */ if (csio->ccb_h.target_lun != 0) ccbh->status = CAM_DEV_NOT_THERE; /* if we're happy with the request, queue it for attention */ if (ccbh->status == CAM_REQ_INPROG) { /* save the channel number in the ccb */ csio->ccb_h.sim_priv.entries[0].field= cam_sim_bus(sim); amr_enqueue_ccb(sc, ccb); amr_startio(sc); return; } break; } case XPT_CALC_GEOMETRY: { cam_calc_geometry(&ccb->ccg, /*extended*/1); break; } /* * Return path stats. Some of these should probably be amended. */ case XPT_PATH_INQ: { struct ccb_pathinq *cpi = & ccb->cpi; debug(3, "XPT_PATH_INQ"); cpi->version_num = 1; /* XXX??? */ cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16; cpi->target_sprt = 0; cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN; cpi->hba_eng_cnt = 0; cpi->max_target = AMR_MAX_TARGETS; cpi->max_lun = 0 /* AMR_MAX_LUNS*/; cpi->initiator_id = 7; /* XXX variable? */ strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); strncpy(cpi->hba_vid, "LSI", HBA_IDLEN); strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); cpi->unit_number = cam_sim_unit(sim); cpi->bus_id = cam_sim_bus(sim); cpi->base_transfer_speed = 132 * 1024; /* XXX */ cpi->transport = XPORT_SPI; cpi->transport_version = 2; cpi->protocol = PROTO_SCSI; cpi->protocol_version = SCSI_REV_2; cpi->ccb_h.status = CAM_REQ_CMP; break; } case XPT_RESET_BUS: { struct ccb_pathinq *cpi = & ccb->cpi; debug(1, "XPT_RESET_BUS"); cpi->ccb_h.status = CAM_REQ_CMP; break; } case XPT_RESET_DEV: { debug(1, "XPT_RESET_DEV"); ccb->ccb_h.status = CAM_REQ_CMP; break; } case XPT_GET_TRAN_SETTINGS: { struct ccb_trans_settings *cts = &(ccb->cts); debug(3, "XPT_GET_TRAN_SETTINGS"); struct ccb_trans_settings_scsi *scsi; struct ccb_trans_settings_spi *spi; scsi = &cts->proto_specific.scsi; spi = &cts->xport_specific.spi; cts->protocol = PROTO_SCSI; cts->protocol_version = SCSI_REV_2; cts->transport = XPORT_SPI; cts->transport_version = 2; if (cts->type == CTS_TYPE_USER_SETTINGS) { ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; break; } spi->flags = CTS_SPI_FLAGS_DISC_ENB; spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT; spi->sync_period = 6; /* 40MHz how wide is this bus? */ spi->sync_offset = 31; /* How to extract this from board? */ spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET | CTS_SPI_VALID_BUS_WIDTH | CTS_SPI_VALID_DISC; scsi->valid = CTS_SCSI_VALID_TQ; ccb->ccb_h.status = CAM_REQ_CMP; break; } case XPT_SET_TRAN_SETTINGS: debug(3, "XPT_SET_TRAN_SETTINGS"); ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; break; /* * Reject anything else as unsupported. */ default: /* we can't do this */ ccb->ccb_h.status = CAM_REQ_INVALID; break; } KKASSERT(lockstatus(&sc->amr_list_lock, curthread) != 0); xpt_done(ccb); } /*********************************************************************** * Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI * command. */ static int amr_cam_command(struct amr_softc *sc, struct amr_command **acp) { struct amr_command *ac; struct amr_passthrough *ap; struct amr_ext_passthrough *aep; struct ccb_scsiio *csio; int bus, target, error; error = 0; ac = NULL; ap = NULL; aep = NULL; /* check to see if there is a ccb for us to work with */ if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL) goto out; /* get bus/target, XXX validate against protected devices? */ bus = csio->ccb_h.sim_priv.entries[0].field; target = csio->ccb_h.target_id; /* * Build a passthrough command. */ /* construct command */ if ((ac = amr_alloccmd(sc)) == NULL) { error = ENOMEM; goto out; } /* construct passthrough */ if (sc->support_ext_cdb ) { aep = &ac->ac_ccb->ccb_epthru; aep->ap_timeout = 2; aep->ap_ars = 1; aep->ap_request_sense_length = 14; aep->ap_islogical = 0; aep->ap_channel = bus; aep->ap_scsi_id = target; aep->ap_logical_drive_no = csio->ccb_h.target_lun; aep->ap_cdb_length = csio->cdb_len; aep->ap_data_transfer_length = csio->dxfer_len; if (csio->ccb_h.flags & CAM_CDB_POINTER) { bcopy(csio->cdb_io.cdb_ptr, aep->ap_cdb, csio->cdb_len); } else { bcopy(csio->cdb_io.cdb_bytes, aep->ap_cdb, csio->cdb_len); } /* * we leave the data s/g list and s/g count to the map routine * later */ debug(2, " COMMAND %x/%d+%d to %d:%d:%d", aep->ap_cdb[0], aep->ap_cdb_length, csio->dxfer_len, aep->ap_channel, aep->ap_scsi_id, aep->ap_logical_drive_no); } else { ap = &ac->ac_ccb->ccb_pthru; ap->ap_timeout = 0; ap->ap_ars = 1; ap->ap_request_sense_length = 14; ap->ap_islogical = 0; ap->ap_channel = bus; ap->ap_scsi_id = target; ap->ap_logical_drive_no = csio->ccb_h.target_lun; ap->ap_cdb_length = csio->cdb_len; ap->ap_data_transfer_length = csio->dxfer_len; if (csio->ccb_h.flags & CAM_CDB_POINTER) { bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len); } else { bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb, csio->cdb_len); } /* * we leave the data s/g list and s/g count to the map routine * later */ debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0], ap->ap_cdb_length, csio->dxfer_len, ap->ap_channel, ap->ap_scsi_id, ap->ap_logical_drive_no); } ac->ac_flags |= AMR_CMD_CCB; ac->ac_data = csio->data_ptr; ac->ac_length = csio->dxfer_len; if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) ac->ac_flags |= AMR_CMD_DATAIN; if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) ac->ac_flags |= AMR_CMD_DATAOUT; ac->ac_private = csio; ac->ac_complete = amr_cam_complete; if ( sc->support_ext_cdb ) { ac->ac_mailbox.mb_command = AMR_CMD_EXTPASS; } else { ac->ac_mailbox.mb_command = AMR_CMD_PASS; } out: if (error != 0) { if (ac != NULL) amr_releasecmd(ac); if (csio != NULL) /* put it back and try again later */ amr_requeue_ccb(sc, (union ccb *)csio); } *acp = ac; return(error); } /*********************************************************************** * Check for interrupt status */ static void amr_cam_poll(struct cam_sim *sim) { amr_done(cam_sim_softc(sim)); } /********************************************************************** * Handle completion of a command submitted via CAM. */ static void amr_cam_complete(struct amr_command *ac) { struct amr_passthrough *ap; struct amr_ext_passthrough *aep; struct ccb_scsiio *csio; struct scsi_inquiry_data *inq; int scsi_status, cdb0; #ifdef AMR_DEBUG char hexstr[HEX_NCPYLEN(16)]; #endif ap = &ac->ac_ccb->ccb_pthru; aep = &ac->ac_ccb->ccb_epthru; csio = (struct ccb_scsiio *)ac->ac_private; inq = (struct scsi_inquiry_data *)csio->data_ptr; if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS) scsi_status = aep->ap_scsi_status; else scsi_status = ap->ap_scsi_status; debug(1, "status 0x%x AP scsi_status 0x%x", ac->ac_status, scsi_status); /* Make sure the status is sane */ if ((ac->ac_status != AMR_STATUS_SUCCESS) && (scsi_status == 0)) { csio->ccb_h.status = CAM_REQ_CMP_ERR; goto out; } /* * Hide disks from CAM so that they're not picked up and treated as * 'normal' disks. * * If the configuration provides a mechanism to mark a disk a "not * managed", we could add handling for that to allow disks to be * selectively visible. */ /* handle passthrough SCSI status */ switch(scsi_status) { case 0: /* completed OK */ if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS) cdb0 = aep->ap_cdb[0]; else cdb0 = ap->ap_cdb[0]; if ((cdb0 == INQUIRY) && (SID_TYPE(inq) == T_DIRECT)) inq->device = (inq->device & 0xe0) | T_NODEVICE; csio->ccb_h.status = CAM_REQ_CMP; break; case 0x02: csio->ccb_h.status = CAM_SCSI_STATUS_ERROR; csio->scsi_status = SCSI_STATUS_CHECK_COND; if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS) bcopy(aep->ap_request_sense_area, &csio->sense_data, AMR_MAX_REQ_SENSE_LEN); else bcopy(ap->ap_request_sense_area, &csio->sense_data, AMR_MAX_REQ_SENSE_LEN); csio->sense_len = AMR_MAX_REQ_SENSE_LEN; csio->ccb_h.status |= CAM_AUTOSNS_VALID; break; case 0x08: csio->ccb_h.status = CAM_SCSI_BUSY; break; case 0xf0: case 0xf4: default: /* * Non-zero LUNs are already filtered, so there's no need * to return CAM_DEV_NOT_THERE. */ csio->ccb_h.status = CAM_SEL_TIMEOUT; break; } out: if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) debug(2, "%s\n", hexncpy(csio->data_ptr, imin(csio->dxfer_len, 16), hexstr, HEX_NCPYLEN(imin(csio->dxfer_len, 16)), " ")); lockmgr(&ac->ac_sc->amr_list_lock, LK_EXCLUSIVE); xpt_done((union ccb *)csio); amr_releasecmd(ac); lockmgr(&ac->ac_sc->amr_list_lock, LK_RELEASE); }