sys/mips/cavium/octeon_pmc.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * $FreeBSD$
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/bus.h>
  37 #include <sys/interrupt.h>
  38 #include <sys/kernel.h>
  39 #include <sys/module.h>
  40 #include <sys/rman.h>
  41 #include <sys/malloc.h>
  42 #include <sys/smp.h>
  43 #include <sys/pmc.h>
  44 #include <sys/pmckern.h>
  45
  46 #include <machine/bus.h>
  47 #include <machine/intr_machdep.h>
  48
  49 #include <contrib/octeon-sdk/cvmx.h>
  50 #include <mips/cavium/octeon_irq.h>
  51
  52 struct octeon_pmc_softc {
  53         struct rman irq_rman;
  54         struct resource *octeon_pmc_irq;
  55 };
  56
  57 static void             octeon_pmc_identify(driver_t *, device_t);
  58 static int              octeon_pmc_probe(device_t);
  59 static int              octeon_pmc_attach(device_t);
  60 static int              octeon_pmc_intr(void *);
  61
  62 static void
  63 octeon_pmc_identify(driver_t *drv, device_t parent)
  64 {
  65         if (octeon_has_feature(OCTEON_FEATURE_USB))
  66                 BUS_ADD_CHILD(parent, 0, "pmc", 0);
  67 }
  68
  69 static int
  70 octeon_pmc_probe(device_t dev)
  71 {
  72         if (device_get_unit(dev) != 0)
  73                 return (ENXIO);
  74
  75         device_set_desc(dev, "Cavium Octeon Performance Counters");
  76         return (BUS_PROBE_NOWILDCARD);
  77 }
  78
  79 static int
  80 octeon_pmc_attach(device_t dev)
  81 {
  82         struct octeon_pmc_softc *sc;
  83         int error;
  84         int rid;
  85
  86         sc = device_get_softc(dev);
  87
  88         rid = 0;
  89         sc->octeon_pmc_irq = bus_alloc_resource(dev,
  90             SYS_RES_IRQ, &rid, OCTEON_PMC_IRQ,
  91             OCTEON_PMC_IRQ, 1, RF_ACTIVE);
  92
  93         if (sc->octeon_pmc_irq == NULL) {
  94                 device_printf(dev, "could not allocate irq%d\n", OCTEON_PMC_IRQ);
  95                 return (ENXIO);
  96         }
  97
  98         error = bus_setup_intr(dev, sc->octeon_pmc_irq,
  99             INTR_TYPE_MISC, octeon_pmc_intr, NULL, sc, NULL);
 100         if (error != 0) {
 101                 device_printf(dev, "bus_setup_intr failed: %d\n", error);
 102                 return (error);
 103         }
 104
 105         return (0);
 106 }
 107
 108 static int
 109 octeon_pmc_intr(void *arg)
 110 {
 111         struct trapframe *tf = PCPU_GET(curthread)->td_intr_frame;
 112
 113         if (pmc_intr)
 114                 (*pmc_intr)(tf);
 115
 116         return (FILTER_HANDLED);
 117 }
 118
 119 static device_method_t octeon_pmc_methods[] = {
 120         DEVMETHOD(device_identify,      octeon_pmc_identify),
 121         DEVMETHOD(device_probe,         octeon_pmc_probe),
 122         DEVMETHOD(device_attach,        octeon_pmc_attach),
 123         { 0, 0 }
 124 };
 125
 126 static driver_t octeon_pmc_driver = {
 127         "pmc",
 128         octeon_pmc_methods,
 129         sizeof(struct octeon_pmc_softc),
 130 };
 131 static devclass_t octeon_pmc_devclass;
 132 DRIVER_MODULE(octeon_pmc, nexus, octeon_pmc_driver, octeon_pmc_devclass, 0, 0);