octeon_pmc.c revision 296373
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: releng/10.3/sys/mips/cavium/octeon_pmc.c 265999 2014-05-14 01:35:43Z ian $ 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: releng/10.3/sys/mips/cavium/octeon_pmc.c 265999 2014-05-14 01:35:43Z ian $"); 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 50struct octeon_pmc_softc { 51 struct rman irq_rman; 52 struct resource *octeon_pmc_irq; 53}; 54 55static void octeon_pmc_identify(driver_t *, device_t); 56static int octeon_pmc_probe(device_t); 57static int octeon_pmc_attach(device_t); 58static int octeon_pmc_intr(void *); 59 60static void 61octeon_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 67static int 68octeon_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 77static int 78octeon_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 106static int 107octeon_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 117static 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 124static driver_t octeon_pmc_driver = { 125 "pmc", 126 octeon_pmc_methods, 127 sizeof(struct octeon_pmc_softc), 128}; 129static devclass_t octeon_pmc_devclass; 130DRIVER_MODULE(octeon_pmc, nexus, octeon_pmc_driver, octeon_pmc_devclass, 0, 0); 131