The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/mfi/mfi_cam.c

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    1 /*-
    2  * Copyright 2007 Scott Long
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include "opt_mfi.h"
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/kernel.h>
   35 #include <sys/malloc.h>
   36 #include <sys/module.h>
   37 #include <sys/selinfo.h>
   38 #include <sys/bus.h>
   39 #include <sys/conf.h>
   40 #include <sys/eventhandler.h>
   41 #include <sys/rman.h>
   42 #include <sys/bus_dma.h>
   43 #include <sys/bio.h>
   44 #include <sys/ioccom.h>
   45 #include <sys/uio.h>
   46 #include <sys/proc.h>
   47 #include <sys/signalvar.h>
   48 
   49 #include <cam/cam.h>
   50 #include <cam/cam_ccb.h>
   51 #include <cam/cam_debug.h>
   52 #include <cam/cam_sim.h>
   53 #include <cam/cam_xpt_sim.h>
   54 #include <cam/scsi/scsi_all.h>
   55 #include <cam/scsi/scsi_message.h>
   56 
   57 #include <sys/bus.h>
   58 #include <sys/conf.h>
   59 #include <machine/md_var.h>
   60 #include <machine/bus.h>
   61 #include <machine/resource.h>
   62 #include <sys/rman.h>
   63 
   64 #include <dev/mfi/mfireg.h>
   65 #include <dev/mfi/mfi_ioctl.h>
   66 #include <dev/mfi/mfivar.h>
   67 
   68 struct mfip_softc {
   69         device_t        dev;
   70         struct mfi_softc *mfi_sc;
   71         struct cam_devq *devq;
   72         struct cam_sim  *sim;
   73         struct cam_path *path;
   74 };
   75 
   76 static int      mfip_probe(device_t);
   77 static int      mfip_attach(device_t);
   78 static int      mfip_detach(device_t);
   79 static void     mfip_cam_action(struct cam_sim *, union ccb *);
   80 static void     mfip_cam_poll(struct cam_sim *);
   81 static struct mfi_command * mfip_start(void *);
   82 static void     mfip_done(struct mfi_command *cm);
   83 
   84 static devclass_t       mfip_devclass;
   85 static device_method_t  mfip_methods[] = {
   86         DEVMETHOD(device_probe,         mfip_probe),
   87         DEVMETHOD(device_attach,        mfip_attach),
   88         DEVMETHOD(device_detach,        mfip_detach),
   89         {0, 0}
   90 };
   91 static driver_t mfip_driver = {
   92         "mfip",
   93         mfip_methods,
   94         sizeof(struct mfip_softc)
   95 };
   96 DRIVER_MODULE(mfip, mfi, mfip_driver, mfip_devclass, 0, 0);
   97 MODULE_DEPEND(mfip, cam, 1, 1, 1);
   98 
   99 #define ccb_mfip_ptr sim_priv.entries[0].ptr
  100 
  101 static int
  102 mfip_probe(device_t dev)
  103 {
  104 
  105         device_set_desc(dev, "SCSI Passthrough Bus");
  106         return (0);
  107 }
  108 
  109 static int
  110 mfip_attach(device_t dev)
  111 {
  112         struct mfip_softc *sc;
  113         struct mfi_softc *mfisc;
  114 
  115         sc = device_get_softc(dev);
  116         if (sc == NULL)
  117                 return (EINVAL);
  118 
  119         mfisc = device_get_softc(device_get_parent(dev));
  120         sc->dev = dev;
  121         sc->mfi_sc = mfisc;
  122         mfisc->mfi_cam_start = mfip_start;
  123 
  124         if ((sc->devq = cam_simq_alloc(MFI_SCSI_MAX_CMDS)) == NULL)
  125                 return (ENOMEM);
  126 
  127         sc->sim = cam_sim_alloc(mfip_cam_action, mfip_cam_poll, "mfi", sc,
  128                                 device_get_unit(dev), &mfisc->mfi_io_lock, 1,
  129                                 MFI_SCSI_MAX_CMDS, sc->devq);
  130         if (sc->sim == NULL) {
  131                 cam_simq_free(sc->devq);
  132                 device_printf(dev, "CAM SIM attach failed\n");
  133                 return (EINVAL);
  134         }
  135 
  136         mtx_lock(&mfisc->mfi_io_lock);
  137         if (xpt_bus_register(sc->sim, dev, 0) != 0) {
  138                 device_printf(dev, "XPT bus registration failed\n");
  139                 cam_sim_free(sc->sim, FALSE);
  140                 cam_simq_free(sc->devq);
  141                 mtx_unlock(&mfisc->mfi_io_lock);
  142                 return (EINVAL);
  143         }
  144         mtx_unlock(&mfisc->mfi_io_lock);
  145 
  146         return (0);
  147 }
  148 
  149 static int
  150 mfip_detach(device_t dev)
  151 {
  152         struct mfip_softc *sc;
  153 
  154         sc = device_get_softc(dev);
  155         if (sc == NULL)
  156                 return (EINVAL);
  157 
  158         if (sc->sim != NULL) {
  159                 mtx_lock(&sc->mfi_sc->mfi_io_lock);
  160                 xpt_bus_deregister(cam_sim_path(sc->sim));
  161                 cam_sim_free(sc->sim, FALSE);
  162                 mtx_unlock(&sc->mfi_sc->mfi_io_lock);
  163         }
  164 
  165         if (sc->devq != NULL)
  166                 cam_simq_free(sc->devq);
  167 
  168         return (0);
  169 }
  170 
  171 static void
  172 mfip_cam_action(struct cam_sim *sim, union ccb *ccb)
  173 {
  174         struct mfip_softc *sc = cam_sim_softc(sim);
  175         struct mfi_softc *mfisc = sc->mfi_sc;
  176 
  177         mtx_assert(&mfisc->mfi_io_lock, MA_OWNED);
  178 
  179         switch (ccb->ccb_h.func_code) {
  180         case XPT_PATH_INQ:
  181         {
  182                 struct ccb_pathinq *cpi = &ccb->cpi;
  183 
  184                 cpi->version_num = 1;
  185                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
  186                 cpi->target_sprt = 0;
  187                 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
  188                 cpi->hba_eng_cnt = 0;
  189                 cpi->max_target = MFI_SCSI_MAX_TARGETS;
  190                 cpi->max_lun = MFI_SCSI_MAX_LUNS;
  191                 cpi->initiator_id = MFI_SCSI_INITIATOR_ID;
  192                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
  193                 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN);
  194                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
  195                 cpi->unit_number = cam_sim_unit(sim);
  196                 cpi->bus_id = cam_sim_bus(sim);
  197                 cpi->base_transfer_speed = 150000;
  198                 cpi->transport = XPORT_SAS;
  199                 cpi->transport_version = 0;
  200                 cpi->protocol = PROTO_SCSI;
  201                 cpi->protocol_version = SCSI_REV_2;
  202                 cpi->ccb_h.status = CAM_REQ_CMP;
  203                 break;
  204         }
  205         case XPT_RESET_BUS:
  206                 ccb->ccb_h.status = CAM_REQ_CMP;
  207                 break;
  208         case XPT_RESET_DEV:
  209                 ccb->ccb_h.status = CAM_REQ_CMP;
  210                 break;
  211         case XPT_GET_TRAN_SETTINGS:
  212         {
  213                 struct ccb_trans_settings_sas *sas =
  214                     &ccb->cts.xport_specific.sas;
  215 
  216                 ccb->cts.protocol = PROTO_SCSI;
  217                 ccb->cts.protocol_version = SCSI_REV_2;
  218                 ccb->cts.transport = XPORT_SAS;
  219                 ccb->cts.transport_version = 0;
  220 
  221                 sas->valid &= ~CTS_SAS_VALID_SPEED;
  222                 sas->bitrate = 150000;
  223 
  224                 ccb->ccb_h.status = CAM_REQ_CMP;
  225                 break;
  226         }
  227         case XPT_SET_TRAN_SETTINGS:
  228                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
  229                 break;
  230         case XPT_SCSI_IO:
  231         {
  232                 struct ccb_hdr          *ccbh = &ccb->ccb_h;
  233                 struct ccb_scsiio       *csio = &ccb->csio;
  234 
  235                 ccbh->status = CAM_REQ_INPROG;
  236                 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) {
  237                         ccbh->status = CAM_REQ_INVALID;
  238                         break;
  239                 }
  240                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
  241                         if (ccbh->flags & CAM_DATA_PHYS) {
  242                                 ccbh->status = CAM_REQ_INVALID;
  243                                 break;
  244                         }
  245                         if (ccbh->flags & CAM_SCATTER_VALID) {
  246                                 ccbh->status = CAM_REQ_INVALID;
  247                                 break;
  248                         }
  249                 }
  250 
  251                 ccbh->ccb_mfip_ptr = sc;
  252                 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe);
  253                 mfi_startio(mfisc);
  254                 return;
  255         }
  256         default:
  257                 ccb->ccb_h.status = CAM_REQ_INVALID;
  258                 break;
  259         }
  260 
  261         xpt_done(ccb);
  262         return;
  263 }
  264 
  265 static struct mfi_command *
  266 mfip_start(void *data)
  267 {
  268         union ccb *ccb = data;
  269         struct ccb_hdr *ccbh = &ccb->ccb_h;
  270         struct ccb_scsiio *csio = &ccb->csio;
  271         struct mfip_softc *sc;
  272         struct mfi_pass_frame *pt;
  273         struct mfi_command *cm;
  274 
  275         sc = ccbh->ccb_mfip_ptr;
  276 
  277         if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL)
  278                 return (NULL);
  279 
  280         pt = &cm->cm_frame->pass;
  281         pt->header.cmd = MFI_CMD_PD_SCSI_IO;
  282         pt->header.cmd_status = 0;
  283         pt->header.scsi_status = 0;
  284         pt->header.target_id = ccbh->target_id;
  285         pt->header.lun_id = ccbh->target_lun;
  286         pt->header.flags = 0;
  287         pt->header.timeout = 0;
  288         pt->header.data_len = csio->dxfer_len;
  289         pt->header.sense_len = MFI_SENSE_LEN;
  290         pt->header.cdb_len = csio->cdb_len;
  291         pt->sense_addr_lo = cm->cm_sense_busaddr;
  292         pt->sense_addr_hi = 0;
  293         if (ccbh->flags & CAM_CDB_POINTER)
  294                 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len);
  295         else
  296                 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len);
  297         cm->cm_complete = mfip_done;
  298         cm->cm_private = ccb;
  299         cm->cm_sg = &pt->sgl;
  300         cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE;
  301         cm->cm_data = csio->data_ptr;
  302         cm->cm_len = csio->dxfer_len;
  303         switch (ccbh->flags & CAM_DIR_MASK) {
  304         case CAM_DIR_IN:
  305                 cm->cm_flags = MFI_CMD_DATAIN;
  306                 break;
  307         case CAM_DIR_OUT:
  308                 cm->cm_flags = MFI_CMD_DATAOUT;
  309                 break;
  310         case CAM_DIR_NONE:
  311         default:
  312                 cm->cm_data = NULL;
  313                 cm->cm_len = 0;
  314                 cm->cm_flags = 0;
  315                 break;
  316         }
  317 
  318         TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe);
  319         return (cm);
  320 }
  321 
  322 static void
  323 mfip_done(struct mfi_command *cm)
  324 {
  325         union ccb *ccb = cm->cm_private;
  326         struct ccb_hdr *ccbh = &ccb->ccb_h;
  327         struct ccb_scsiio *csio = &ccb->csio;
  328         struct mfip_softc *sc;
  329         struct mfi_pass_frame *pt;
  330 
  331         sc = ccbh->ccb_mfip_ptr;
  332         pt = &cm->cm_frame->pass;
  333 
  334         switch (pt->header.cmd_status) {
  335         case MFI_STAT_OK:
  336         {
  337                 uint8_t command, device;
  338 
  339                 ccbh->status = CAM_REQ_CMP;
  340                 csio->scsi_status = pt->header.scsi_status;
  341                 if (ccbh->flags & CAM_CDB_POINTER)
  342                         command = ccb->csio.cdb_io.cdb_ptr[0];
  343                 else
  344                         command = ccb->csio.cdb_io.cdb_bytes[0];
  345                 if (command == INQUIRY) {
  346                         device = ccb->csio.data_ptr[0] & 0x1f;
  347                         if ((device == T_DIRECT) || (device == T_PROCESSOR))
  348                                 csio->data_ptr[0] =
  349                                      (device & 0xe0) | T_NODEVICE;
  350                 }
  351                 break;
  352         }
  353         case MFI_STAT_SCSI_DONE_WITH_ERROR:
  354         {
  355                 int sense_len;
  356 
  357                 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
  358                 csio->scsi_status = pt->header.scsi_status;
  359                 sense_len = min(pt->header.sense_len, sizeof(struct scsi_sense_data));
  360                 bzero(&csio->sense_data, sizeof(struct scsi_sense_data));
  361                 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len);
  362                 break;
  363         }
  364         case MFI_STAT_DEVICE_NOT_FOUND:
  365                 ccbh->status = CAM_SEL_TIMEOUT;
  366                 break;
  367         case MFI_STAT_SCSI_IO_FAILED:
  368                 ccbh->status = CAM_REQ_CMP_ERR;
  369                 csio->scsi_status = pt->header.scsi_status;
  370                 break;
  371         default:
  372                 ccbh->status = CAM_REQ_CMP_ERR;
  373                 csio->scsi_status = pt->header.scsi_status;
  374                 break;
  375         }
  376 
  377         mfi_release_command(cm);
  378         xpt_done(ccb);
  379 }
  380 
  381 static void
  382 mfip_cam_poll(struct cam_sim *sim)
  383 {
  384         return;
  385 }
  386 

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