io/n2piupc/n2piupc.c

	n2piupc.c revision 193974072f41a843678abf5f61979c748687e66b
ea1a228c80597366447774aa1988868492330eb5schwartz/*
ea1a228c80597366447774aa1988868492330eb5schwartz * CDDL HEADER START
ea1a228c80597366447774aa1988868492330eb5schwartz *
ea1a228c80597366447774aa1988868492330eb5schwartz * The contents of this file are subject to the terms of the
ea1a228c80597366447774aa1988868492330eb5schwartz * Common Development and Distribution License (the "License").
ea1a228c80597366447774aa1988868492330eb5schwartz * You may not use this file except in compliance with the License.
ea1a228c80597366447774aa1988868492330eb5schwartz *
ea1a228c80597366447774aa1988868492330eb5schwartz * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
ea1a228c80597366447774aa1988868492330eb5schwartz * or http://www.opensolaris.org/os/licensing.
ea1a228c80597366447774aa1988868492330eb5schwartz * See the License for the specific language governing permissions
ea1a228c80597366447774aa1988868492330eb5schwartz * and limitations under the License.
ea1a228c80597366447774aa1988868492330eb5schwartz *
ea1a228c80597366447774aa1988868492330eb5schwartz * When distributing Covered Code, include this CDDL HEADER in each
ea1a228c80597366447774aa1988868492330eb5schwartz * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
ea1a228c80597366447774aa1988868492330eb5schwartz * If applicable, add the following below this CDDL HEADER, with the
ea1a228c80597366447774aa1988868492330eb5schwartz * fields enclosed by brackets "[]" replaced with your own identifying
ea1a228c80597366447774aa1988868492330eb5schwartz * information: Portions Copyright [yyyy] [name of copyright owner]
ea1a228c80597366447774aa1988868492330eb5schwartz *
ea1a228c80597366447774aa1988868492330eb5schwartz * CDDL HEADER END
ea1a228c80597366447774aa1988868492330eb5schwartz */
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/*
193974072f41a843678abf5f61979c748687e66bSherry Moore * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
ea1a228c80597366447774aa1988868492330eb5schwartz * Use is subject to license terms.
ea1a228c80597366447774aa1988868492330eb5schwartz */
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/*
ea1a228c80597366447774aa1988868492330eb5schwartz * Driver interconnect for the N2 PIU performance counter driver.
ea1a228c80597366447774aa1988868492330eb5schwartz */
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz#include <sys/types.h>
ea1a228c80597366447774aa1988868492330eb5schwartz#include <sys/ddi.h>
ea1a228c80597366447774aa1988868492330eb5schwartz#include <sys/modctl.h>
ea1a228c80597366447774aa1988868492330eb5schwartz#include <sys/hsvc.h>
ea1a228c80597366447774aa1988868492330eb5schwartz#include <n2piupc_tables.h>
ea1a228c80597366447774aa1988868492330eb5schwartz#include <n2piupc.h>
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/* Debugging level. */
ea1a228c80597366447774aa1988868492330eb5schwartz#ifdef DEBUG
ea1a228c80597366447774aa1988868492330eb5schwartzint n2piupc_debug = 0;
ea1a228c80597366447774aa1988868492330eb5schwartz#endif /* DEBUG */
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/* State structure anchor. */
ea1a228c80597366447774aa1988868492330eb5schwartzvoid *n2piupc_state_p;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzstatic int n2piupc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd);
ea1a228c80597366447774aa1988868492330eb5schwartzstatic int n2piupc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/*
ea1a228c80597366447774aa1988868492330eb5schwartz * Support for hypervisor versioning.
ea1a228c80597366447774aa1988868492330eb5schwartz * Need to negotiate for the N2PIU_PERF_COUNTER_GROUP
ea1a228c80597366447774aa1988868492330eb5schwartz */
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz#define N2PIUPC_REQ_MAJOR_VER       1
ea1a228c80597366447774aa1988868492330eb5schwartz#define N2PIUPC_REQ_MINOR_VER       0
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzstatic hsvc_info_t n2piupc_hsvc = {
ea1a228c80597366447774aa1988868492330eb5schwartz    HSVC_REV_1,
ea1a228c80597366447774aa1988868492330eb5schwartz    NULL,
ea1a228c80597366447774aa1988868492330eb5schwartz    N2PIU_PERF_COUNTER_GROUP_ID,
ea1a228c80597366447774aa1988868492330eb5schwartz    N2PIUPC_REQ_MAJOR_VER,
ea1a228c80597366447774aa1988868492330eb5schwartz    N2PIUPC_REQ_MINOR_VER,
ea1a228c80597366447774aa1988868492330eb5schwartz    MODULE_NAME /* Passed in as a #define from Makefile */
ea1a228c80597366447774aa1988868492330eb5schwartz};
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzstatic uint64_t n2piupc_sup_minor;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/* Driver boilerplate stuff.  Having no minor nodes keep things very simple. */
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzstatic struct dev_ops n2piupc_ops = {
ea1a228c80597366447774aa1988868492330eb5schwartz    DEVO_REV,
ea1a228c80597366447774aa1988868492330eb5schwartz    0,
ea1a228c80597366447774aa1988868492330eb5schwartz    nulldev,
ea1a228c80597366447774aa1988868492330eb5schwartz    nulldev,
ea1a228c80597366447774aa1988868492330eb5schwartz    nulldev,
ea1a228c80597366447774aa1988868492330eb5schwartz    n2piupc_attach,
ea1a228c80597366447774aa1988868492330eb5schwartz    n2piupc_detach,
ea1a228c80597366447774aa1988868492330eb5schwartz    nodev,
ea1a228c80597366447774aa1988868492330eb5schwartz    NULL,
ea1a228c80597366447774aa1988868492330eb5schwartz    NULL,
193974072f41a843678abf5f61979c748687e66bSherry Moore    nodev,
193974072f41a843678abf5f61979c748687e66bSherry Moore    ddi_quiesce_not_needed,
ea1a228c80597366447774aa1988868492330eb5schwartz};
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzextern struct mod_ops mod_driverops;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzstatic struct modldrv md = {
ea1a228c80597366447774aa1988868492330eb5schwartz    &mod_driverops,
193974072f41a843678abf5f61979c748687e66bSherry Moore    "N2 PIU Perf Counter",
ea1a228c80597366447774aa1988868492330eb5schwartz    &n2piupc_ops,
ea1a228c80597366447774aa1988868492330eb5schwartz};
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzstatic struct modlinkage ml = {
ea1a228c80597366447774aa1988868492330eb5schwartz    MODREV_1,
ea1a228c80597366447774aa1988868492330eb5schwartz    (void *)&md,
ea1a228c80597366447774aa1988868492330eb5schwartz    NULL
ea1a228c80597366447774aa1988868492330eb5schwartz};
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/*
ea1a228c80597366447774aa1988868492330eb5schwartz * One-time module-wide initialization.
ea1a228c80597366447774aa1988868492330eb5schwartz */
ea1a228c80597366447774aa1988868492330eb5schwartzint
ea1a228c80597366447774aa1988868492330eb5schwartz_init(void)
ea1a228c80597366447774aa1988868492330eb5schwartz{
ea1a228c80597366447774aa1988868492330eb5schwartz    int rval;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    /* Negotiate for hypervisor support. */
ea1a228c80597366447774aa1988868492330eb5schwartz    if ((rval = hsvc_register(&n2piupc_hsvc, &n2piupc_sup_minor)) !=
ea1a228c80597366447774aa1988868492330eb5schwartz        DDI_SUCCESS) {
ea1a228c80597366447774aa1988868492330eb5schwartz        N2PIUPC_DBG1("%s: Could not hsvc_register: %d\n",
ea1a228c80597366447774aa1988868492330eb5schwartz            MODULE_NAME, rval);
ea1a228c80597366447774aa1988868492330eb5schwartz        goto bad_hv_register;
ea1a228c80597366447774aa1988868492330eb5schwartz    }
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    /* Initialize per-leaf soft state pointer. */
ea1a228c80597366447774aa1988868492330eb5schwartz    if ((rval = ddi_soft_state_init(&n2piupc_state_p,
ea1a228c80597366447774aa1988868492330eb5schwartz        sizeof (n2piupc_t), 1)) != DDI_SUCCESS)
ea1a228c80597366447774aa1988868492330eb5schwartz        goto bad_softstate_init;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    /* Initialize one-time kstat structures. */
ea1a228c80597366447774aa1988868492330eb5schwartz    if ((rval = n2piupc_kstat_init()) != DDI_SUCCESS)
ea1a228c80597366447774aa1988868492330eb5schwartz        goto bad_kstat_init;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    /* If all checks out, install the module. */
ea1a228c80597366447774aa1988868492330eb5schwartz    if ((rval = mod_install(&ml)) == DDI_SUCCESS)
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz        return (DDI_SUCCESS);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzbad_mod_install:
ea1a228c80597366447774aa1988868492330eb5schwartz    n2piupc_kstat_fini();
ea1a228c80597366447774aa1988868492330eb5schwartzbad_kstat_init:
ea1a228c80597366447774aa1988868492330eb5schwartz    ddi_soft_state_fini(&n2piupc_state_p);
ea1a228c80597366447774aa1988868492330eb5schwartzbad_softstate_init:
ea1a228c80597366447774aa1988868492330eb5schwartz    (void) hsvc_unregister(&n2piupc_hsvc);
ea1a228c80597366447774aa1988868492330eb5schwartzbad_hv_register:
ea1a228c80597366447774aa1988868492330eb5schwartz    return (rval);
ea1a228c80597366447774aa1988868492330eb5schwartz}
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/*
ea1a228c80597366447774aa1988868492330eb5schwartz * One-time module-wide cleanup, after last detach is done.
ea1a228c80597366447774aa1988868492330eb5schwartz */
ea1a228c80597366447774aa1988868492330eb5schwartzint
ea1a228c80597366447774aa1988868492330eb5schwartz_fini(void)
ea1a228c80597366447774aa1988868492330eb5schwartz{
ea1a228c80597366447774aa1988868492330eb5schwartz    int rval;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    /*
ea1a228c80597366447774aa1988868492330eb5schwartz     * Remove the module first as this operation is the only thing here
ea1a228c80597366447774aa1988868492330eb5schwartz     * which can fail.
ea1a228c80597366447774aa1988868492330eb5schwartz     */
ea1a228c80597366447774aa1988868492330eb5schwartz    rval = mod_remove(&ml);
ea1a228c80597366447774aa1988868492330eb5schwartz    if (rval != DDI_SUCCESS)
ea1a228c80597366447774aa1988868492330eb5schwartz        return (rval);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    /* One-shot kstat data structure cleanup. */
ea1a228c80597366447774aa1988868492330eb5schwartz    n2piupc_kstat_fini();
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    /* Free px soft state */
ea1a228c80597366447774aa1988868492330eb5schwartz    ddi_soft_state_fini(&n2piupc_state_p);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    /* Unregister with hypervisor. */
ea1a228c80597366447774aa1988868492330eb5schwartz    (void) hsvc_unregister(&n2piupc_hsvc);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    return (rval);
ea1a228c80597366447774aa1988868492330eb5schwartz}
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzint
ea1a228c80597366447774aa1988868492330eb5schwartz_info(struct modinfo *modinfop)
ea1a228c80597366447774aa1988868492330eb5schwartz{
ea1a228c80597366447774aa1988868492330eb5schwartz    return (mod_info(&ml, modinfop));
ea1a228c80597366447774aa1988868492330eb5schwartz}
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/*
ea1a228c80597366447774aa1988868492330eb5schwartz * Per-instance initialization.  Suspend/resume not supported.
ea1a228c80597366447774aa1988868492330eb5schwartz */
ea1a228c80597366447774aa1988868492330eb5schwartzstatic int
ea1a228c80597366447774aa1988868492330eb5schwartzn2piupc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
ea1a228c80597366447774aa1988868492330eb5schwartz{
ea1a228c80597366447774aa1988868492330eb5schwartz    n2piupc_t *n2piupc_p;
ea1a228c80597366447774aa1988868492330eb5schwartz    uint32_t regprop[4];
ea1a228c80597366447774aa1988868492330eb5schwartz    int len;
ea1a228c80597366447774aa1988868492330eb5schwartz    int instance = ddi_get_instance(dip);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    switch (cmd) {
ea1a228c80597366447774aa1988868492330eb5schwartz    case DDI_RESUME:
ea1a228c80597366447774aa1988868492330eb5schwartz    case DDI_ATTACH:
ea1a228c80597366447774aa1988868492330eb5schwartz        if (ddi_soft_state_zalloc(n2piupc_state_p, instance) !=
ea1a228c80597366447774aa1988868492330eb5schwartz            DDI_SUCCESS) {
ea1a228c80597366447774aa1988868492330eb5schwartz            cmn_err(CE_WARN, "%s%d: Can't allocate softstate.\n",
ea1a228c80597366447774aa1988868492330eb5schwartz                NAMEINST(dip));
ea1a228c80597366447774aa1988868492330eb5schwartz            goto bad_softstate;
ea1a228c80597366447774aa1988868492330eb5schwartz        }
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz        n2piupc_p = (n2piupc_t *)ddi_get_soft_state(n2piupc_state_p,
ea1a228c80597366447774aa1988868492330eb5schwartz            instance);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz        n2piupc_p->n2piupc_dip = dip;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz        /* Get handle for hypervisor access of performance counters. */
ea1a228c80597366447774aa1988868492330eb5schwartz        len = sizeof (regprop);
ea1a228c80597366447774aa1988868492330eb5schwartz        if (ddi_getlongprop_buf(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
ea1a228c80597366447774aa1988868492330eb5schwartz            "reg", (caddr_t)regprop, &len) != DDI_SUCCESS) {
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz            cmn_err(CE_WARN,
ea1a228c80597366447774aa1988868492330eb5schwartz                "%s%d: Cannot get reg property\n",
ea1a228c80597366447774aa1988868492330eb5schwartz                NAMEINST(dip));
ea1a228c80597366447774aa1988868492330eb5schwartz            goto bad_handle;
ea1a228c80597366447774aa1988868492330eb5schwartz        }
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz        /* Look only at the lower 28 bits of the highest cell. */
ea1a228c80597366447774aa1988868492330eb5schwartz        n2piupc_p->n2piupc_handle = regprop[0] & 0xfffffff;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz        /* Set up kstats. */
ea1a228c80597366447774aa1988868492330eb5schwartz        if (n2piupc_kstat_attach(n2piupc_p) != DDI_SUCCESS)
ea1a228c80597366447774aa1988868492330eb5schwartz            goto bad_kstat_attach;
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz        return (DDI_SUCCESS);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartzbad_kstat_attach:
ea1a228c80597366447774aa1988868492330eb5schwartzbad_handle:
ea1a228c80597366447774aa1988868492330eb5schwartz        (void) ddi_soft_state_free(n2piupc_state_p, instance);
ea1a228c80597366447774aa1988868492330eb5schwartzbad_softstate:
ea1a228c80597366447774aa1988868492330eb5schwartz        return (DDI_FAILURE);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    default:
ea1a228c80597366447774aa1988868492330eb5schwartz        return (DDI_FAILURE);
ea1a228c80597366447774aa1988868492330eb5schwartz    }
ea1a228c80597366447774aa1988868492330eb5schwartz}
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz/*
ea1a228c80597366447774aa1988868492330eb5schwartz * Per-instance cleanup.  Suspend/resume not supported.
ea1a228c80597366447774aa1988868492330eb5schwartz */
ea1a228c80597366447774aa1988868492330eb5schwartzstatic int
ea1a228c80597366447774aa1988868492330eb5schwartzn2piupc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
ea1a228c80597366447774aa1988868492330eb5schwartz{
ea1a228c80597366447774aa1988868492330eb5schwartz    int instance = ddi_get_instance(dip);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    n2piupc_t *n2piupc_p = (n2piupc_t *)ddi_get_soft_state(
ea1a228c80597366447774aa1988868492330eb5schwartz        n2piupc_state_p, instance);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    switch (cmd) {
ea1a228c80597366447774aa1988868492330eb5schwartz    case DDI_SUSPEND:
ea1a228c80597366447774aa1988868492330eb5schwartz    case DDI_DETACH:
ea1a228c80597366447774aa1988868492330eb5schwartz        n2piupc_kstat_detach(n2piupc_p);
ea1a228c80597366447774aa1988868492330eb5schwartz        (void) ddi_soft_state_free(n2piupc_state_p, instance);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz        return (DDI_SUCCESS);
ea1a228c80597366447774aa1988868492330eb5schwartz
ea1a228c80597366447774aa1988868492330eb5schwartz    default:
ea1a228c80597366447774aa1988868492330eb5schwartz        return (DDI_FAILURE);
ea1a228c80597366447774aa1988868492330eb5schwartz    }
ea1a228c80597366447774aa1988868492330eb5schwartz}