octeon_pmc.c

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    1 /*-
    2  * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
    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  * $FreeBSD$
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/bus.h>
   35 #include <sys/interrupt.h>
   36 #include <sys/kernel.h>
   37 #include <sys/module.h>
   38 #include <sys/rman.h>
   39 #include <sys/malloc.h>
   40 #include <sys/smp.h>
   41 #include <sys/pmc.h>
   42 #include <sys/pmckern.h>
   43 
   44 #include <machine/bus.h>
   45 #include <machine/intr_machdep.h>
   46 
   47 #include <contrib/octeon-sdk/cvmx.h>
   48 #include <mips/cavium/octeon_irq.h>
   49 
   50 struct octeon_pmc_softc {
   51         struct rman irq_rman;
   52         struct resource *octeon_pmc_irq;
   53 };
   54 
   55 static void             octeon_pmc_identify(driver_t *, device_t);
   56 static int              octeon_pmc_probe(device_t);
   57 static int              octeon_pmc_attach(device_t);
   58 static int              octeon_pmc_intr(void *);
   59 
   60 static void
   61 octeon_pmc_identify(driver_t *drv, device_t parent)
   62 {
   63         if (octeon_has_feature(OCTEON_FEATURE_USB))
   64                 BUS_ADD_CHILD(parent, 0, "pmc", 0);
   65 }
   66 
   67 static int
   68 octeon_pmc_probe(device_t dev)
   69 {
   70         if (device_get_unit(dev) != 0)
   71                 return (ENXIO);
   72 
   73         device_set_desc(dev, "Cavium Octeon Performance Counters");
   74         return (BUS_PROBE_NOWILDCARD);
   75 }
   76 
   77 static int
   78 octeon_pmc_attach(device_t dev)
   79 {
   80         struct octeon_pmc_softc *sc;
   81         int error;
   82         int rid;
   83 
   84         sc = device_get_softc(dev);
   85 
   86         rid = 0;
   87         sc->octeon_pmc_irq = bus_alloc_resource(dev, 
   88             SYS_RES_IRQ, &rid, OCTEON_PMC_IRQ,
   89             OCTEON_PMC_IRQ, 1, RF_ACTIVE);
   90 
   91         if (sc->octeon_pmc_irq == NULL) {
   92                 device_printf(dev, "could not allocate irq%d\n", OCTEON_PMC_IRQ);
   93                 return (ENXIO);
   94         }
   95 
   96         error = bus_setup_intr(dev, sc->octeon_pmc_irq, 
   97             INTR_TYPE_MISC, octeon_pmc_intr, NULL, sc, NULL);
   98         if (error != 0) {
   99                 device_printf(dev, "bus_setup_intr failed: %d\n", error);
  100                 return (error);
  101         }
  102 
  103         return (0);
  104 }
  105 
  106 static int
  107 octeon_pmc_intr(void *arg)
  108 {
  109         struct trapframe *tf = PCPU_GET(curthread)->td_intr_frame;
  110 
  111         if (pmc_intr)
  112                 (*pmc_intr)(PCPU_GET(cpuid), tf);
  113 
  114         return (FILTER_HANDLED);
  115 }
  116 
  117 static device_method_t octeon_pmc_methods[] = {
  118         DEVMETHOD(device_identify,      octeon_pmc_identify),
  119         DEVMETHOD(device_probe,         octeon_pmc_probe),
  120         DEVMETHOD(device_attach,        octeon_pmc_attach),
  121         { 0, 0 }
  122 };
  123 
  124 static driver_t octeon_pmc_driver = {
  125         "pmc",
  126         octeon_pmc_methods,
  127         sizeof(struct octeon_pmc_softc),
  128 };
  129 static devclass_t octeon_pmc_devclass;
  130 DRIVER_MODULE(octeon_pmc, nexus, octeon_pmc_driver, octeon_pmc_devclass, 0, 0);

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FreeBSD/Linux Kernel Cross Reference sys/mips/cavium/octeon_pmc.c

FreeBSD/Linux Kernel Cross Reference
sys/mips/cavium/octeon_pmc.c