sys/mips/cavium/octeon_pmc.c

   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);