FreeBSD/Linux Kernel Cross Reference
sys/dev/pst/pst-iop.c

     /*-
      * Copyright (c) 2001,2002,2003 Søren Schmidt <sos@FreeBSD.org>
      * 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 <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/8.1/sys/dev/pst/pst-iop.c 196405 2009-08-20 20:23:28Z jhb $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    #include <sys/bio.h>
    #include <sys/malloc.h>
    #include <sys/lock.h>
    #include <sys/mutex.h>
    #include <vm/vm.h>
    #include <vm/pmap.h>
    #include <machine/stdarg.h>
    #include <machine/resource.h>
    #include <machine/bus.h>
    #include <sys/rman.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    
    #include "dev/pst/pst-iop.h"
    
    struct iop_request {
        struct i2o_single_reply *reply;
        u_int32_t mfa;
    };
    
    /* local vars */
    MALLOC_DEFINE(M_PSTIOP, "PSTIOP", "Promise SuperTrak IOP driver");
    
    int
    iop_init(struct iop_softc *sc)
    {
        int mfa, timeout = 10000;
    
        while ((mfa = sc->reg->iqueue) == 0xffffffff && --timeout)
            DELAY(1000);
        if (!timeout) {
            printf("pstiop: no free mfa\n");
            return 0;
        }
        iop_free_mfa(sc, mfa);
    
        sc->reg->oqueue_intr_mask = 0xffffffff;
    
        if (!iop_reset(sc)) {
            printf("pstiop: no reset response\n");
            return 0;
        }
    
        if (!iop_init_outqueue(sc)) {
            printf("pstiop: init outbound queue failed\n");
            return 0;
        }
    
        /* register iop_attach to be run when interrupts are enabled */
        if (!(sc->iop_delayed_attach = (struct intr_config_hook *)
                                       malloc(sizeof(struct intr_config_hook),
                                       M_PSTIOP, M_NOWAIT | M_ZERO))) {
            printf("pstiop: malloc of delayed attach hook failed\n");
            return 0;
        }
        sc->iop_delayed_attach->ich_func = iop_attach;
        sc->iop_delayed_attach->ich_arg = sc;
        if (config_intrhook_establish(sc->iop_delayed_attach)) {
            printf("pstiop: config_intrhook_establish failed\n");
            free(sc->iop_delayed_attach, M_PSTIOP);
        }
        return 1;
    }
   
   void
   iop_attach(void *arg)
   {
       struct iop_softc *sc;
       int i;
   
       sc = arg;
       if (sc->iop_delayed_attach) {
           config_intrhook_disestablish(sc->iop_delayed_attach);
           free(sc->iop_delayed_attach, M_PSTIOP);
           sc->iop_delayed_attach = NULL;
       }
   
       if (!iop_get_lct(sc)) {
           printf("pstiop: get LCT failed\n");
           return;
       }
   
       /* figure out what devices are here and config as needed */
       for (i = 0; sc->lct[i].entry_size == I2O_LCT_ENTRYSIZE; i++) {
   #ifdef PSTDEBUG
           struct i2o_get_param_reply *reply;
   
           printf("pstiop: LCT entry %d ", i);
           printf("class=%04x ", sc->lct[i].class);
           printf("sub=%04x ", sc->lct[i].sub_class);
           printf("localtid=%04x ", sc->lct[i].local_tid);
           printf("usertid=%04x ", sc->lct[i].user_tid);
           printf("parentid=%04x\n", sc->lct[i].parent_tid);
   
           if ((reply = iop_get_util_params(sc, sc->lct[i].local_tid,
                                            I2O_PARAMS_OPERATION_FIELD_GET,
                                            I2O_UTIL_DEVICE_IDENTITY_GROUP_NO))) {
               struct i2o_device_identity *ident =
                   (struct i2o_device_identity *)reply->result;
               printf("pstiop: vendor=<%.16s> product=<%.16s>\n",
                      ident->vendor, ident->product);
               printf("pstiop: description=<%.16s> revision=<%.8s>\n",
                      ident->description, ident->revision);
               contigfree(reply, PAGE_SIZE, M_PSTIOP);
           }
   #endif
   
           if (sc->lct[i].user_tid != I2O_TID_NONE &&
               sc->lct[i].user_tid != I2O_TID_HOST)
               continue;
   
           switch (sc->lct[i].class) {
           case I2O_CLASS_DDM:
               if (sc->lct[i].sub_class == I2O_SUBCLASS_ISM)
                   sc->ism = sc->lct[i].local_tid;
               break;
   
           case I2O_CLASS_RANDOM_BLOCK_STORAGE:
               pst_add_raid(sc, &sc->lct[i]);
               break;
           }
       }
   
       /* setup and enable interrupts */
       bus_setup_intr(sc->dev, sc->r_irq, INTR_TYPE_BIO|INTR_ENTROPY|INTR_MPSAFE,
                      NULL, iop_intr, sc, &sc->handle);
       sc->reg->oqueue_intr_mask = 0x0;
   }
   
   void
   iop_intr(void *data)
   {
       struct iop_softc *sc = (struct iop_softc *)data;
       struct i2o_single_reply *reply;
       u_int32_t mfa;
   
       /* we might get more than one finished request pr interrupt */
       mtx_lock(&sc->mtx);
       while (1) {
           if ((mfa = sc->reg->oqueue) == 0xffffffff)
               if ((mfa = sc->reg->oqueue) == 0xffffffff)
                   break;
   
           reply = (struct i2o_single_reply *)(sc->obase + (mfa - sc->phys_obase));
   
           /* if this is an event register reply, shout! */
           if (reply->function == I2O_UTIL_EVENT_REGISTER) {
               struct i2o_util_event_reply_message *event =
                   (struct i2o_util_event_reply_message *)reply;
   
               printf("pstiop: EVENT!! idx=%08x data=%08x\n",
                      event->event_mask, event->event_data[0]);
               break;
           }
   
           /* if reply is a failurenotice we need to free the original mfa */
           if (reply->message_flags & I2O_MESSAGE_FLAGS_FAIL)
               iop_free_mfa(sc,((struct i2o_fault_reply *)(reply))->preserved_mfa);
   
           /* reply->initiator_context points to the service routine */
           ((void (*)(struct iop_softc *, u_int32_t, struct i2o_single_reply *))
               (reply->initiator_context))(sc, mfa, reply);
       }
       mtx_unlock(&sc->mtx);
   }
   
   int
   iop_reset(struct iop_softc *sc)
   {
       struct i2o_exec_iop_reset_message *msg;
       int mfa, timeout = 5000;
       volatile u_int32_t reply = 0;
   
       mfa = iop_get_mfa(sc);
       msg = (struct i2o_exec_iop_reset_message *)(sc->ibase + mfa);
       bzero(msg, sizeof(struct i2o_exec_iop_reset_message));
       msg->version_offset = 0x1;
       msg->message_flags = 0x0;
       msg->message_size = sizeof(struct i2o_exec_iop_reset_message) >> 2;
       msg->target_address = I2O_TID_IOP;
       msg->initiator_address = I2O_TID_HOST;
       msg->function = I2O_EXEC_IOP_RESET;
       msg->status_word_low_addr = vtophys(&reply);
       msg->status_word_high_addr = 0;
   
       sc->reg->iqueue = mfa;
   
       while (--timeout && !reply)
           DELAY(1000);
   
       /* wait for iqueue ready */
       timeout = 10000;
       while ((mfa = sc->reg->iqueue) == 0xffffffff && --timeout)
           DELAY(1000);
   
       iop_free_mfa(sc, mfa);
       return reply;
   }
   
   int
   iop_init_outqueue(struct iop_softc *sc)
   {
       struct i2o_exec_init_outqueue_message *msg;
       int i, mfa, timeout = 5000;
       volatile u_int32_t reply = 0;
   
       if (!(sc->obase = contigmalloc(I2O_IOP_OUTBOUND_FRAME_COUNT *
                                      I2O_IOP_OUTBOUND_FRAME_SIZE,
                                      M_PSTIOP, M_NOWAIT,
                                      0x00010000, 0xFFFFFFFF,
                                      PAGE_SIZE, 0))) {
           printf("pstiop: contigmalloc of outqueue buffers failed!\n");
           return 0;
       }
       sc->phys_obase = vtophys(sc->obase);
       mfa = iop_get_mfa(sc);
       msg = (struct i2o_exec_init_outqueue_message *)(sc->ibase + mfa);
       bzero(msg, sizeof(struct i2o_exec_init_outqueue_message));
       msg->version_offset = 0x61;
       msg->message_flags = 0x0;
       msg->message_size = sizeof(struct i2o_exec_init_outqueue_message) >> 2;
       msg->target_address = I2O_TID_IOP;
       msg->initiator_address = I2O_TID_HOST;
       msg->function = I2O_EXEC_OUTBOUND_INIT;
       msg->host_pagesize = PAGE_SIZE;
       msg->init_code = 0x00; /* SOS XXX should be 0x80 == OS */
       msg->queue_framesize = I2O_IOP_OUTBOUND_FRAME_SIZE / sizeof(u_int32_t);
       msg->sgl[0].flags = I2O_SGL_SIMPLE | I2O_SGL_END | I2O_SGL_EOB;
       msg->sgl[0].count = sizeof(reply);
       msg->sgl[0].phys_addr[0] = vtophys(&reply);
       msg->sgl[1].flags = I2O_SGL_END | I2O_SGL_EOB;
       msg->sgl[1].count = 1;
       msg->sgl[1].phys_addr[0] = 0;
   
       sc->reg->iqueue = mfa;
   
       /* wait for init to complete */
       while (--timeout && reply != I2O_EXEC_OUTBOUND_INIT_COMPLETE)
           DELAY(1000);
   
       if (!timeout) {
           printf("pstiop: timeout waiting for init-complete response\n");
           iop_free_mfa(sc, mfa);
           return 0;
       }
   
       /* now init our oqueue bufs */
       for (i = 0; i < I2O_IOP_OUTBOUND_FRAME_COUNT; i++) {
           sc->reg->oqueue = sc->phys_obase + (i * I2O_IOP_OUTBOUND_FRAME_SIZE);
           DELAY(1000);
       }
   
       return 1;
   }
   
   int
   iop_get_lct(struct iop_softc *sc)
   {
       struct i2o_exec_get_lct_message *msg;
       struct i2o_get_lct_reply *reply;
       int mfa;
   #define ALLOCSIZE        (PAGE_SIZE + (256 * sizeof(struct i2o_lct_entry)))
   
       if (!(reply = contigmalloc(ALLOCSIZE, M_PSTIOP, M_NOWAIT | M_ZERO,
                                  0x00010000, 0xFFFFFFFF, PAGE_SIZE, 0)))
           return 0;
   
       mfa = iop_get_mfa(sc);
       msg = (struct i2o_exec_get_lct_message *)(sc->ibase + mfa);
       bzero(msg, sizeof(struct i2o_exec_get_lct_message));
       msg->version_offset = 0x61;
       msg->message_flags = 0x0;
       msg->message_size = sizeof(struct i2o_exec_get_lct_message) >> 2;
       msg->target_address = I2O_TID_IOP;
       msg->initiator_address = I2O_TID_HOST;
       msg->function = I2O_EXEC_LCT_NOTIFY;
       msg->class = I2O_CLASS_MATCH_ANYCLASS;
       msg->last_change_id = 0;
   
       msg->sgl.flags = I2O_SGL_SIMPLE | I2O_SGL_END | I2O_SGL_EOB;
       msg->sgl.count = ALLOCSIZE;
       msg->sgl.phys_addr[0] = vtophys(reply);
   
       if (iop_queue_wait_msg(sc, mfa, (struct i2o_basic_message *)msg)) {
           contigfree(reply, ALLOCSIZE, M_PSTIOP);
           return 0;
       }
       if (!(sc->lct = malloc(reply->table_size * sizeof(struct i2o_lct_entry),
                              M_PSTIOP, M_NOWAIT | M_ZERO))) {
           contigfree(reply, ALLOCSIZE, M_PSTIOP);
           return 0;
       }
       bcopy(&reply->entry[0], sc->lct,
             reply->table_size * sizeof(struct i2o_lct_entry));
       sc->lct_count = reply->table_size;
       contigfree(reply, ALLOCSIZE, M_PSTIOP);
       return 1;
   }
   
   struct i2o_get_param_reply *
   iop_get_util_params(struct iop_softc *sc, int target, int operation, int group)
   {
       struct i2o_util_get_param_message *msg;
       struct i2o_get_param_operation *param;
       struct i2o_get_param_reply *reply;
       int mfa;
   
       if (!(param = contigmalloc(PAGE_SIZE, M_PSTIOP, M_NOWAIT | M_ZERO,
                                  0x00010000, 0xFFFFFFFF, PAGE_SIZE, 0)))
           return NULL;
   
       if (!(reply = contigmalloc(PAGE_SIZE, M_PSTIOP, M_NOWAIT | M_ZERO,
                                  0x00010000, 0xFFFFFFFF, PAGE_SIZE, 0)))
           return NULL;
   
       mfa = iop_get_mfa(sc);
       msg = (struct i2o_util_get_param_message *)(sc->ibase + mfa);
       bzero(msg, sizeof(struct i2o_util_get_param_message));
       msg->version_offset = 0x51;
       msg->message_flags = 0x0;
       msg->message_size = sizeof(struct i2o_util_get_param_message) >> 2;
       msg->target_address = target;
       msg->initiator_address = I2O_TID_HOST;
       msg->function = I2O_UTIL_PARAMS_GET;
       msg->operation_flags = 0;
   
       param->operation_count = 1;
       param->operation[0].operation = operation;
       param->operation[0].group = group;
       param->operation[0].field_count = 0xffff;
   
       msg->sgl[0].flags = I2O_SGL_SIMPLE | I2O_SGL_DIR | I2O_SGL_EOB;
       msg->sgl[0].count = sizeof(struct i2o_get_param_operation);
       msg->sgl[0].phys_addr[0] = vtophys(param);
   
       msg->sgl[1].flags = I2O_SGL_SIMPLE | I2O_SGL_END | I2O_SGL_EOB;
       msg->sgl[1].count = PAGE_SIZE;
       msg->sgl[1].phys_addr[0] = vtophys(reply);
   
       if (iop_queue_wait_msg(sc, mfa, (struct i2o_basic_message *)msg) ||
           reply->error_info_size) {
           contigfree(reply, PAGE_SIZE, M_PSTIOP);
           reply = NULL;
       }
       contigfree(param, PAGE_SIZE, M_PSTIOP);
       return reply;
   }
   
   u_int32_t
   iop_get_mfa(struct iop_softc *sc)
   {
       u_int32_t mfa;
       int timeout = 10000;
   
       while ((mfa = sc->reg->iqueue) == 0xffffffff && timeout) {
           DELAY(1000);
           timeout--;
       }
       if (!timeout)
           printf("pstiop: no free mfa\n");
       return mfa;
   }
   
   void
   iop_free_mfa(struct iop_softc *sc, int mfa)
   {
       struct i2o_basic_message *msg = (struct i2o_basic_message *)(sc->ibase+mfa);
   
       bzero(msg, sizeof(struct i2o_basic_message));
       msg->version = 0x01;
       msg->message_flags = 0x0;
       msg->message_size = sizeof(struct i2o_basic_message) >> 2;
       msg->target_address = I2O_TID_IOP;
       msg->initiator_address = I2O_TID_HOST;
       msg->function = I2O_UTIL_NOP;
       sc->reg->iqueue = mfa;
   }
   
   static void
   iop_done(struct iop_softc *sc, u_int32_t mfa, struct i2o_single_reply *reply)
   {
       struct iop_request *request =
           (struct iop_request *)reply->transaction_context;
       
       request->reply = reply;
       request->mfa = mfa;
       wakeup(request);
   }
   
   int
   iop_queue_wait_msg(struct iop_softc *sc, int mfa, struct i2o_basic_message *msg)
   {
       struct i2o_single_reply *reply;
       struct iop_request request;
       u_int32_t out_mfa;
       int status, timeout = 10000;
   
       mtx_lock(&sc->mtx);
       if (!(sc->reg->oqueue_intr_mask & 0x08)) {
           msg->transaction_context = (u_int32_t)&request;
           msg->initiator_context = (u_int32_t)iop_done;
           sc->reg->iqueue = mfa;
           if (msleep(&request, &sc->mtx, PRIBIO, "pstwt", 10 * hz)) {
               printf("pstiop: timeout waiting for message response\n");
               iop_free_mfa(sc, mfa);
               mtx_unlock(&sc->mtx);
               return -1;
           }
           status = request.reply->status;
           sc->reg->oqueue = request.mfa;
       }
       else {
           sc->reg->iqueue = mfa;
           while (--timeout && ((out_mfa = sc->reg->oqueue) == 0xffffffff))
               DELAY(1000);
           if (!timeout) {
               printf("pstiop: timeout waiting for message response\n");
               iop_free_mfa(sc, mfa);
               mtx_unlock(&sc->mtx);
               return -1;
           }
           reply = (struct i2o_single_reply *)(sc->obase+(out_mfa-sc->phys_obase));
           status = reply->status;
           sc->reg->oqueue = out_mfa;
       }
       mtx_unlock(&sc->mtx);
       return status;
   }
   
   int
   iop_create_sgl(struct i2o_basic_message *msg, caddr_t data, int count, int dir)
   {
       struct i2o_sgl *sgl = (struct i2o_sgl *)((int32_t *)msg + msg->offset);
       u_int32_t sgl_count, sgl_phys;
       int i = 0;
   
       if (((uintptr_t)data & 3) || (count & 3)) {
           printf("pstiop: non aligned DMA transfer attempted\n");
           return 0;
       }
       if (!count) {
           printf("pstiop: zero length DMA transfer attempted\n");
           return 0;
       }
   
       sgl_count = min(count, (PAGE_SIZE - ((uintptr_t)data & PAGE_MASK)));
       sgl_phys = vtophys(data);
       sgl->flags = dir | I2O_SGL_PAGELIST | I2O_SGL_EOB | I2O_SGL_END;
       sgl->count = count;
       data += sgl_count;
       count -= sgl_count;
   
       while (count) {
           sgl->phys_addr[i] = sgl_phys;
           sgl_phys = vtophys(data);
           data += min(count, PAGE_SIZE);
           count -= min(count, PAGE_SIZE);
           if (++i >= I2O_SGL_MAX_SEGS) {
               printf("pstiop: too many segments in SGL\n");
               return 0;
           }
       }
       sgl->phys_addr[i] = sgl_phys;
       msg->message_size += i;
       return 1;
   }

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