FreeBSD/Linux Kernel Cross Reference
sys/dev/dpaa/bman_portals.c

     /*-
      * Copyright (c) 2012 Semihalf.
      * 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.
     */
    
    #include "opt_platform.h"
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/lock.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/proc.h>
    #include <sys/pcpu.h>
    #include <sys/sched.h>
    
    #include <machine/bus.h>
    #include <machine/tlb.h>
    
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include <powerpc/mpc85xx/mpc85xx.h>
    
    #include "bman.h"
    #include "portals.h"
    
    t_Handle bman_portal_setup(struct bman_softc *);
    
    struct dpaa_portals_softc *bp_sc;
    
    int
    bman_portals_attach(device_t dev)
    {
            struct dpaa_portals_softc *sc;
    
            sc = bp_sc = device_get_softc(dev);
            
            /* Map bman portal to physical address space */
            if (law_enable(OCP85XX_TGTIF_BMAN, sc->sc_dp_pa, sc->sc_dp_size)) {
                    bman_portals_detach(dev);
                    return (ENXIO);
            }
            /* Set portal properties for XX_VirtToPhys() */
            XX_PortalSetInfo(dev);
    
            return (bus_generic_attach(dev));
    }
    
    int
    bman_portals_detach(device_t dev)
    {
            struct dpaa_portals_softc *sc;
            int i;
    
            bp_sc = NULL;
            sc = device_get_softc(dev);
    
            for (i = 0; i < ARRAY_SIZE(sc->sc_dp); i++) {
                    if (sc->sc_dp[i].dp_ph != NULL) {
                            thread_lock(curthread);
                            sched_bind(curthread, i);
                            thread_unlock(curthread);
    
                            BM_PORTAL_Free(sc->sc_dp[i].dp_ph);
    
                            thread_lock(curthread);
                            sched_unbind(curthread);
                            thread_unlock(curthread);
                    }
    
                    if (sc->sc_dp[i].dp_ires != NULL) {
                            XX_DeallocIntr((uintptr_t)sc->sc_dp[i].dp_ires);
                            bus_release_resource(dev, SYS_RES_IRQ,
                               sc->sc_dp[i].dp_irid, sc->sc_dp[i].dp_ires);
                   }
           }
           for (i = 0; i < ARRAY_SIZE(sc->sc_rres); i++) {
                   if (sc->sc_rres[i] != NULL)
                           bus_release_resource(dev, SYS_RES_MEMORY,
                               sc->sc_rrid[i],
                               sc->sc_rres[i]);
           }
   
           return (0);
   }
   
   t_Handle
   bman_portal_setup(struct bman_softc *bsc)
   {
           struct dpaa_portals_softc *sc;
           t_BmPortalParam bpp;
           t_Handle portal;
           unsigned int cpu;
           uintptr_t p;
   
           /* Return NULL if we're not ready or while detach */
           if (bp_sc == NULL)
                   return (NULL);
   
           sc = bp_sc;
   
           sched_pin();
           portal = NULL;
           cpu = PCPU_GET(cpuid);
   
           /* Check if portal is ready */
           while (atomic_cmpset_acq_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph,
               0, -1) == 0) {
                   p = atomic_load_acq_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph);
   
                   /* Return if portal is already initialized */
                   if (p != 0 && p != -1) {
                           sched_unpin();
                           return ((t_Handle)p);
                   }
   
                   /* Not inititialized and "owned" by another thread */
                   thread_lock(curthread);
                   mi_switch(SW_VOL);
           }
   
           /* Map portal registers */
           dpaa_portal_map_registers(sc);
   
           /* Configure and initialize portal */
           bpp.ceBaseAddress = rman_get_bushandle(sc->sc_rres[0]);
           bpp.ciBaseAddress = rman_get_bushandle(sc->sc_rres[1]);
           bpp.h_Bm = bsc->sc_bh;
           bpp.swPortalId = cpu;
           bpp.irq = (uintptr_t)sc->sc_dp[cpu].dp_ires;
   
           portal = BM_PORTAL_Config(&bpp);
           if (portal == NULL)
                   goto err;
   
           if (BM_PORTAL_Init(portal) != E_OK)
                   goto err;
   
           atomic_store_rel_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph, (uintptr_t)portal);
           
           sched_unpin();
   
           return (portal);
   
   err:
           if (portal != NULL)
                   BM_PORTAL_Free(portal);
   
           atomic_store_rel_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph, 0);
           sched_unpin();
   
           return (NULL);
   }

Cache object: 9924bc2d1b4cdf5e5fc8d2a862a90322