FreeBSD/Linux Kernel Cross Reference
sys/dev/tws/tws_user.c

     /*
      * Copyright (c) 2010, LSI Corp.
      * All rights reserved.
      * Author : Manjunath Ranganathaiah
      * Support: freebsdraid@lsi.com
      *
      * 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. Neither the name of the <ORGANIZATION> nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
     * COPYRIGHT HOLDER 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: releng/11.2/sys/dev/tws/tws_user.c 331722 2018-03-29 02:50:57Z eadler $
     */
    
    #include <dev/tws/tws.h>
    #include <dev/tws/tws_services.h>
    #include <dev/tws/tws_hdm.h>
    #include <dev/tws/tws_user.h>
    
    
    int tws_ioctl(struct cdev *dev, long unsigned int cmd, caddr_t buf, int flags, 
                                                        struct thread *td);
    void tws_passthru_complete(struct tws_request *req);
    extern void tws_circular_aenq_insert(struct tws_softc *sc,
                        struct tws_circular_q *cq, struct tws_event_packet *aen);
    
    
    static int tws_passthru(struct tws_softc *sc, void *buf);
    static int tws_ioctl_aen(struct tws_softc *sc, u_long cmd, void *buf);
    
    extern int tws_bus_scan(struct tws_softc *sc);
    extern struct tws_request *tws_get_request(struct tws_softc *sc, 
                                               u_int16_t type);
    extern int32_t tws_map_request(struct tws_softc *sc, struct tws_request *req);
    extern void tws_unmap_request(struct tws_softc *sc, struct tws_request *req);
    extern uint8_t tws_get_state(struct tws_softc *sc);
    extern void tws_timeout(void *arg);
    
    int
    tws_ioctl(struct cdev *dev, u_long cmd, caddr_t buf, int flags, 
                                                        struct thread *td)
    {
        struct tws_softc *sc = (struct tws_softc *)(dev->si_drv1);
        int error;
    
        TWS_TRACE_DEBUG(sc, "entry", sc, cmd);
        sc->stats.ioctls++;
        switch(cmd) {
            case TWS_IOCTL_FIRMWARE_PASS_THROUGH :
                error = tws_passthru(sc, (void *)buf);
                break;
            case TWS_IOCTL_SCAN_BUS :
                TWS_TRACE_DEBUG(sc, "scan-bus", 0, 0);
                error = tws_bus_scan(sc);
                break;
            default :
                TWS_TRACE_DEBUG(sc, "ioctl-aen", cmd, buf);
                error = tws_ioctl_aen(sc, cmd, (void *)buf);
                break;
    
        }
        return(error);
    }
    
    static int 
    tws_passthru(struct tws_softc *sc, void *buf)
    {
        struct tws_request *req;
        struct tws_ioctl_no_data_buf *ubuf = (struct tws_ioctl_no_data_buf *)buf;
        int error;
        u_int16_t lun4;
    
    
        if ( tws_get_state(sc) != TWS_ONLINE) {
            return(EBUSY);
        }
    
       //==============================================================================================
       // Get a command
       //
       do {
           req = tws_get_request(sc, TWS_REQ_TYPE_PASSTHRU);
           if ( !req ) {
               error = tsleep(sc,  0, "tws_sleep", TWS_IOCTL_TIMEOUT*hz);
               if ( error == EWOULDBLOCK ) {
                   return(ETIMEDOUT);
               }
           } else {
               // Make sure we are still ready for new commands...
               if ( tws_get_state(sc) != TWS_ONLINE) {
                   return(EBUSY);
               }
               break;
           }
       } while(1);
   
       req->length = (ubuf->driver_pkt.buffer_length + 511) & ~511;
       TWS_TRACE_DEBUG(sc, "datal,rid", req->length, req->request_id);
       if ( req->length ) {
           req->data = sc->ioctl_data_mem;
           req->dma_map = sc->ioctl_data_map;
   
           //==========================================================================================
           // Copy data in from user space
           //
           error = copyin(ubuf->pdata, req->data, req->length);
       }
   
       //==============================================================================================
       // Set command fields
       //
       req->flags = TWS_DIR_IN | TWS_DIR_OUT;
       req->cb = tws_passthru_complete;
   
       memcpy(&req->cmd_pkt->cmd, &ubuf->cmd_pkt.cmd, 
                                 sizeof(struct tws_command_apache));
   
       if ( GET_OPCODE(req->cmd_pkt->cmd.pkt_a.res__opcode) == 
                                                  TWS_FW_CMD_EXECUTE_SCSI ) { 
           lun4 = req->cmd_pkt->cmd.pkt_a.lun_l4__req_id & 0xF000;
           req->cmd_pkt->cmd.pkt_a.lun_l4__req_id = lun4 | req->request_id;
       } else {
           req->cmd_pkt->cmd.pkt_g.generic.request_id = (u_int8_t) req->request_id;
       }
   
       //==============================================================================================
       // Send command to controller
       //
       error = tws_map_request(sc, req);
       if (error) {
           ubuf->driver_pkt.os_status = error;
           goto out_data;
       }
   
       if ( req->state == TWS_REQ_STATE_COMPLETE ) {
           ubuf->driver_pkt.os_status = req->error_code;
           goto out_unmap;
       }
   
       mtx_lock(&sc->gen_lock);
       error = mtx_sleep(req, &sc->gen_lock, 0, "tws_passthru", TWS_IOCTL_TIMEOUT*hz);
       mtx_unlock(&sc->gen_lock);
       if (( req->state != TWS_REQ_STATE_COMPLETE ) && ( error == EWOULDBLOCK )) {
               TWS_TRACE_DEBUG(sc, "msleep timeout", error, req->request_id);
               tws_timeout((void*) req);
       }
   
   out_unmap:
       if ( req->error_code == TWS_REQ_RET_RESET ) {
           error = EBUSY;
           req->error_code = EBUSY;
           TWS_TRACE_DEBUG(sc, "ioctl reset", error, req->request_id);
       }
   
       tws_unmap_request(sc, req);
   
       //==============================================================================================
       // Return command status to user space
       //
       memcpy(&ubuf->cmd_pkt.hdr, &req->cmd_pkt->hdr, sizeof(struct tws_command_apache));
       memcpy(&ubuf->cmd_pkt.cmd, &req->cmd_pkt->cmd, sizeof(struct tws_command_apache));
   
   out_data:
       if ( req->length ) {
           //==========================================================================================
           // Copy data out to user space
           //
           if ( !error )
               error = copyout(req->data, ubuf->pdata, ubuf->driver_pkt.buffer_length);
       }
   
       if ( error ) 
           TWS_TRACE_DEBUG(sc, "errored", error, 0);
   
       if ( req->error_code != TWS_REQ_RET_SUBMIT_SUCCESS )
           ubuf->driver_pkt.os_status = error;
   
       //==============================================================================================
       // Free command
       //
       req->state = TWS_REQ_STATE_FREE;
   
       wakeup_one(sc);
   
       return(error);
   }
   
   void 
   tws_passthru_complete(struct tws_request *req)
   {
       req->state = TWS_REQ_STATE_COMPLETE;
       wakeup_one(req);
   
   }
   
   static void 
   tws_retrive_aen(struct tws_softc *sc, u_long cmd, 
                               struct tws_ioctl_packet *ubuf)
   {
       u_int16_t index=0;
       struct tws_event_packet eventp, *qp;
   
       if ( sc->aen_q.head == sc->aen_q.tail ) {
           ubuf->driver_pkt.status = TWS_AEN_NO_EVENTS;
           return;
       }
       
       ubuf->driver_pkt.status = 0;
   
       /* 
        * once this flag is set cli will not display alarms 
        * needs a revisit from tools?
        */
       if ( sc->aen_q.overflow ) {
           ubuf->driver_pkt.status = TWS_AEN_OVERFLOW;
           sc->aen_q.overflow = 0; /* reset */
       }
   
       qp = (struct tws_event_packet *)sc->aen_q.q;
   
       switch (cmd) {
           case TWS_IOCTL_GET_FIRST_EVENT :
               index = sc->aen_q.head;
               break;
           case TWS_IOCTL_GET_LAST_EVENT :
               /* index = tail-1 */ 
               index = (sc->aen_q.depth + sc->aen_q.tail - 1) % sc->aen_q.depth;
               break;
           case TWS_IOCTL_GET_NEXT_EVENT :
               memcpy(&eventp, ubuf->data_buf, sizeof(struct tws_event_packet));
               index = sc->aen_q.head;
               do {
                   if ( qp[index].sequence_id == 
                              (eventp.sequence_id + 1) )
                       break;
                   index  = (index+1) % sc->aen_q.depth;
               }while ( index != sc->aen_q.tail );
               if ( index == sc->aen_q.tail ) {
                   ubuf->driver_pkt.status = TWS_AEN_NO_EVENTS;
                   return;
               }
               break;
           case TWS_IOCTL_GET_PREVIOUS_EVENT :
               memcpy(&eventp, ubuf->data_buf, sizeof(struct tws_event_packet));
               index = sc->aen_q.head;
               do {
                   if ( qp[index].sequence_id == 
                              (eventp.sequence_id - 1) )
                       break;
                   index  = (index+1) % sc->aen_q.depth;
               }while ( index != sc->aen_q.tail );
               if ( index == sc->aen_q.tail ) {
                   ubuf->driver_pkt.status = TWS_AEN_NO_EVENTS;
                   return;
               }
               break;
           default :
               TWS_TRACE_DEBUG(sc, "not a valid event", sc, cmd);
               ubuf->driver_pkt.status = TWS_AEN_NO_EVENTS;
               return;
       }
   
       memcpy(ubuf->data_buf, &qp[index], 
                              sizeof(struct tws_event_packet));
       qp[index].retrieved = TWS_AEN_RETRIEVED;
   
       return;
   
   }
   
   static int 
   tws_ioctl_aen(struct tws_softc *sc, u_long cmd, void *buf)
   {
   
       struct tws_ioctl_packet *ubuf = (struct tws_ioctl_packet *)buf;
       struct tws_compatibility_packet cpkt;
       struct tws_lock_packet lpkt;
       time_t ctime;
   
       mtx_lock(&sc->gen_lock);
       ubuf->driver_pkt.status = 0;
       switch(cmd) {
           case TWS_IOCTL_GET_FIRST_EVENT :
           case TWS_IOCTL_GET_LAST_EVENT :
           case TWS_IOCTL_GET_NEXT_EVENT :
           case TWS_IOCTL_GET_PREVIOUS_EVENT :
               tws_retrive_aen(sc,cmd,ubuf);
               break;
           case TWS_IOCTL_GET_LOCK :
               ctime = TWS_LOCAL_TIME;
               memcpy(&lpkt, ubuf->data_buf, sizeof(struct tws_lock_packet));
               if ( (sc->ioctl_lock.lock == TWS_IOCTL_LOCK_FREE) ||
                    (lpkt.force_flag) ||
                    (ctime >= sc->ioctl_lock.timeout) ) {
                   sc->ioctl_lock.lock = TWS_IOCTL_LOCK_HELD;
                   sc->ioctl_lock.timeout = ctime + (lpkt.timeout_msec / 1000);
                   lpkt.time_remaining_msec = lpkt.timeout_msec;
               }  else {
                   lpkt.time_remaining_msec = (u_int32_t)
                             ((sc->ioctl_lock.timeout - ctime) * 1000);
                   ubuf->driver_pkt.status = TWS_IOCTL_LOCK_ALREADY_HELD;
   
               }
               break;
           case TWS_IOCTL_RELEASE_LOCK :
               if (sc->ioctl_lock.lock == TWS_IOCTL_LOCK_FREE) {
                   ubuf->driver_pkt.status = TWS_IOCTL_LOCK_NOT_HELD;
               } else {
                   sc->ioctl_lock.lock = TWS_IOCTL_LOCK_FREE;
                   ubuf->driver_pkt.status = 0;
               }
               break;
           case TWS_IOCTL_GET_COMPATIBILITY_INFO :
               TWS_TRACE_DEBUG(sc, "get comp info", sc, cmd);
   
               memcpy( cpkt.driver_version, TWS_DRIVER_VERSION_STRING,
                                            sizeof(TWS_DRIVER_VERSION_STRING));
               cpkt.working_srl = sc->cinfo.working_srl;
               cpkt.working_branch = sc->cinfo.working_branch;
               cpkt.working_build = sc->cinfo.working_build;
               cpkt.driver_srl_high = TWS_CURRENT_FW_SRL;
               cpkt.driver_branch_high = TWS_CURRENT_FW_BRANCH;
               cpkt.driver_build_high = TWS_CURRENT_FW_BUILD;
               cpkt.driver_srl_low = TWS_BASE_FW_SRL;
               cpkt.driver_branch_low = TWS_BASE_FW_BRANCH;
               cpkt.driver_build_low = TWS_BASE_FW_BUILD;
               cpkt.fw_on_ctlr_srl = sc->cinfo.fw_on_ctlr_srl;
               cpkt.fw_on_ctlr_branch = sc->cinfo.fw_on_ctlr_branch;
               cpkt.fw_on_ctlr_build = sc->cinfo.fw_on_ctlr_build;
               ubuf->driver_pkt.status = 0;
               int len = sizeof(struct tws_compatibility_packet);
               if ( ubuf->driver_pkt.buffer_length < len )
                   len = ubuf->driver_pkt.buffer_length;
               memcpy(ubuf->data_buf, &cpkt, len);
   
               break;
           default :
               TWS_TRACE_DEBUG(sc, "not valid cmd", cmd, 
                              TWS_IOCTL_GET_COMPATIBILITY_INFO);
               break;
   
       }
       mtx_unlock(&sc->gen_lock);
       return(SUCCESS);
   
   }
   
   void
   tws_circular_aenq_insert(struct tws_softc *sc, struct tws_circular_q *cq,
   struct tws_event_packet *aen)
   {
   
       struct tws_event_packet *q = (struct tws_event_packet *)cq->q;
       volatile u_int16_t head, tail;
       u_int8_t retr;
       mtx_assert(&sc->gen_lock, MA_OWNED);
   
       head = cq->head;
       tail = cq->tail;
       retr = q[tail].retrieved;
   
       memcpy(&q[tail], aen, sizeof(struct tws_event_packet));
       tail = (tail+1) % cq->depth;
   
       if ( head == tail ) { /* q is full */
           if ( retr != TWS_AEN_RETRIEVED )
               cq->overflow = 1;
           cq->head = (head+1) % cq->depth;
       }
       cq->tail = tail;
   
   }

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