sys/dev/dpaa/bman_portals.c

   1 /*-
   2  * Copyright (c) 2012 Semihalf.
   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 "opt_platform.h"
  28 #include <sys/cdefs.h>
  29 __FBSDID("$FreeBSD$");
  30
  31 #include <sys/param.h>
  32 #include <sys/systm.h>
  33 #include <sys/kernel.h>
  34 #include <sys/bus.h>
  35 #include <sys/lock.h>
  36 #include <sys/module.h>
  37 #include <sys/mutex.h>
  38 #include <sys/proc.h>
  39 #include <sys/pcpu.h>
  40 #include <sys/sched.h>
  41
  42 #include <machine/bus.h>
  43 #include <machine/tlb.h>
  44
  45 #include <dev/ofw/ofw_bus.h>
  46 #include <dev/ofw/ofw_bus_subr.h>
  47
  48 #include <powerpc/mpc85xx/mpc85xx.h>
  49
  50 #include "bman.h"
  51 #include "portals.h"
  52
  53 t_Handle bman_portal_setup(struct bman_softc *);
  54
  55 struct dpaa_portals_softc *bp_sc;
  56
  57 int
  58 bman_portals_attach(device_t dev)
  59 {
  60         struct dpaa_portals_softc *sc;
  61
  62         sc = bp_sc = device_get_softc(dev);
  63
  64         /* Map bman portal to physical address space */
  65         if (law_enable(OCP85XX_TGTIF_BMAN, sc->sc_dp_pa, sc->sc_dp_size)) {
  66                 bman_portals_detach(dev);
  67                 return (ENXIO);
  68         }
  69         /* Set portal properties for XX_VirtToPhys() */
  70         XX_PortalSetInfo(dev);
  71
  72         return (bus_generic_attach(dev));
  73 }
  74
  75 int
  76 bman_portals_detach(device_t dev)
  77 {
  78         struct dpaa_portals_softc *sc;
  79         int i;
  80
  81         bp_sc = NULL;
  82         sc = device_get_softc(dev);
  83
  84         for (i = 0; i < ARRAY_SIZE(sc->sc_dp); i++) {
  85                 if (sc->sc_dp[i].dp_ph != NULL) {
  86                         thread_lock(curthread);
  87                         sched_bind(curthread, i);
  88                         thread_unlock(curthread);
  89
  90                         BM_PORTAL_Free(sc->sc_dp[i].dp_ph);
  91
  92                         thread_lock(curthread);
  93                         sched_unbind(curthread);
  94                         thread_unlock(curthread);
  95                 }
  96
  97                 if (sc->sc_dp[i].dp_ires != NULL) {
  98                         XX_DeallocIntr((uintptr_t)sc->sc_dp[i].dp_ires);
  99                         bus_release_resource(dev, SYS_RES_IRQ,
 100                             sc->sc_dp[i].dp_irid, sc->sc_dp[i].dp_ires);
 101                 }
 102         }
 103         for (i = 0; i < ARRAY_SIZE(sc->sc_rres); i++) {
 104                 if (sc->sc_rres[i] != NULL)
 105                         bus_release_resource(dev, SYS_RES_MEMORY,
 106                             sc->sc_rrid[i],
 107                             sc->sc_rres[i]);
 108         }
 109
 110         return (0);
 111 }
 112
 113 t_Handle
 114 bman_portal_setup(struct bman_softc *bsc)
 115 {
 116         struct dpaa_portals_softc *sc;
 117         t_BmPortalParam bpp;
 118         t_Handle portal;
 119         unsigned int cpu;
 120         uintptr_t p;
 121
 122         /* Return NULL if we're not ready or while detach */
 123         if (bp_sc == NULL)
 124                 return (NULL);
 125
 126         sc = bp_sc;
 127
 128         sched_pin();
 129         portal = NULL;
 130         cpu = PCPU_GET(cpuid);
 131
 132         /* Check if portal is ready */
 133         while (atomic_cmpset_acq_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph,
 134             0, -1) == 0) {
 135                 p = atomic_load_acq_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph);
 136
 137                 /* Return if portal is already initialized */
 138                 if (p != 0 && p != -1) {
 139                         sched_unpin();
 140                         return ((t_Handle)p);
 141                 }
 142
 143                 /* Not inititialized and "owned" by another thread */
 144                 thread_lock(curthread);
 145                 mi_switch(SW_VOL, NULL);
 146                 thread_unlock(curthread);
 147         }
 148
 149         /* Map portal registers */
 150         dpaa_portal_map_registers(sc);
 151
 152         /* Configure and initialize portal */
 153         bpp.ceBaseAddress = rman_get_bushandle(sc->sc_rres[0]);
 154         bpp.ciBaseAddress = rman_get_bushandle(sc->sc_rres[1]);
 155         bpp.h_Bm = bsc->sc_bh;
 156         bpp.swPortalId = cpu;
 157         bpp.irq = (uintptr_t)sc->sc_dp[cpu].dp_ires;
 158
 159         portal = BM_PORTAL_Config(&bpp);
 160         if (portal == NULL)
 161                 goto err;
 162
 163         if (BM_PORTAL_Init(portal) != E_OK)
 164                 goto err;
 165
 166         atomic_store_rel_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph, (uintptr_t)portal);
 167
 168         sched_unpin();
 169
 170         return (portal);
 171
 172 err:
 173         if (portal != NULL)
 174                 BM_PORTAL_Free(portal);
 175
 176         atomic_store_rel_ptr((uintptr_t *)&sc->sc_dp[cpu].dp_ph, 0);
 177         sched_unpin();
 178
 179         return (NULL);
 180 }