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

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@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.
     * 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.
     *
     * $FreeBSD$
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/interrupt.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/rman.h>
    #include <sys/malloc.h>
    #include <sys/smp.h>
    #include <sys/pmc.h>
    #include <sys/pmckern.h>
    
    #include <machine/bus.h>
    #include <machine/intr_machdep.h>
    
    #include <contrib/octeon-sdk/cvmx.h>
    #include <mips/cavium/octeon_irq.h>
    
    struct octeon_pmc_softc {
            struct rman irq_rman;
            struct resource *octeon_pmc_irq;
    };
    
    static void             octeon_pmc_identify(driver_t *, device_t);
    static int              octeon_pmc_probe(device_t);
    static int              octeon_pmc_attach(device_t);
    static int              octeon_pmc_intr(void *);
    
    static void
    octeon_pmc_identify(driver_t *drv, device_t parent)
    {
            if (octeon_has_feature(OCTEON_FEATURE_USB))
                    BUS_ADD_CHILD(parent, 0, "pmc", 0);
    }
    
    static int
    octeon_pmc_probe(device_t dev)
    {
            if (device_get_unit(dev) != 0)
                    return (ENXIO);
    
            device_set_desc(dev, "Cavium Octeon Performance Counters");
            return (BUS_PROBE_NOWILDCARD);
    }
    
    static int
    octeon_pmc_attach(device_t dev)
    {
            struct octeon_pmc_softc *sc;
            int error;
            int rid;
    
            sc = device_get_softc(dev);
    
            rid = 0;
            sc->octeon_pmc_irq = bus_alloc_resource(dev, 
                SYS_RES_IRQ, &rid, OCTEON_PMC_IRQ,
                OCTEON_PMC_IRQ, 1, RF_ACTIVE);
    
            if (sc->octeon_pmc_irq == NULL) {
                    device_printf(dev, "could not allocate irq%d\n", OCTEON_PMC_IRQ);
                    return (ENXIO);
            }
    
            error = bus_setup_intr(dev, sc->octeon_pmc_irq, 
                INTR_TYPE_MISC, octeon_pmc_intr, NULL, sc, NULL);
           if (error != 0) {
                   device_printf(dev, "bus_setup_intr failed: %d\n", error);
                   return (error);
           }
   
           return (0);
   }
   
   static int
   octeon_pmc_intr(void *arg)
   {
           struct trapframe *tf = PCPU_GET(curthread)->td_intr_frame;
   
           if (pmc_intr)
                   (*pmc_intr)(tf);
   
           return (FILTER_HANDLED);
   }
   
   static device_method_t octeon_pmc_methods[] = {
           DEVMETHOD(device_identify,      octeon_pmc_identify),
           DEVMETHOD(device_probe,         octeon_pmc_probe),
           DEVMETHOD(device_attach,        octeon_pmc_attach),
           { 0, 0 }
   };
   
   static driver_t octeon_pmc_driver = {
           "pmc",
           octeon_pmc_methods,
           sizeof(struct octeon_pmc_softc),
   };
   static devclass_t octeon_pmc_devclass;
   DRIVER_MODULE(octeon_pmc, nexus, octeon_pmc_driver, octeon_pmc_devclass, 0, 0);

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