usr/src/uts/i86pc/cpu/amd_opteron/ao_main.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 /*
  27  * The CPU module for the AMD Athlon64 and Opteron processors
  28  */
  29
  30 #include <sys/types.h>
  31 #include <sys/cmn_err.h>
  32 #include <sys/sunddi.h>
  33 #include <sys/cpu_module.h>
  34 #include <sys/cpu_module_ms_impl.h>
  35 #include <sys/cpuvar.h>
  36 #include <sys/x86_archext.h>
  37 #include <sys/kmem.h>
  38 #include <sys/pghw.h>
  39 #include <sys/modctl.h>
  40 #include <sys/mc.h>
  41 #include <sys/mca_x86.h>
  42
  43 #include "ao.h"
  44
  45 int ao_ms_support_disable = 0;
  46
  47 static struct ao_chipshared *ao_shared[AO_MAX_CHIPS];
  48
  49 /*
  50  * This cpu module supports AMD family 0xf revisions B/C/D/E/F/G.  If
  51  * a family 0xf cpu beyond the rev G model limit is detected then
  52  * return ENOTSUP and let the generic x86 CPU module load instead.
  53  */
  54 uint_t ao_model_limit = 0x6f;
  55
  56 int
  57 ao_ms_init(cmi_hdl_t hdl, void **datap)
  58 {
  59         uint_t chipid = cmi_hdl_chipid(hdl);
  60         struct ao_chipshared *sp, *osp;
  61         ao_ms_data_t *ao;
  62         uint64_t cap;
  63
  64         if (ao_ms_support_disable || cmi_hdl_model(hdl) >= ao_model_limit)
  65                 return (ENOTSUP);
  66
  67         if (!is_x86_feature(x86_featureset, X86FSET_MCA))
  68                 return (ENOTSUP);
  69
  70         if (cmi_hdl_rdmsr(hdl, IA32_MSR_MCG_CAP, &cap) != CMI_SUCCESS)
  71                 return (ENOTSUP);
  72
  73         if (!(cap & MCG_CAP_CTL_P))
  74                 return (ENOTSUP);
  75
  76         if ((cap & MCG_CAP_COUNT_MASK) != AMD_MCA_BANK_COUNT) {
  77                 cmn_err(CE_WARN, "Chip %d core %d has %llu MCA banks, "
  78                     "expected %u: disabling AMD-specific MCA support on "
  79                     "this CPU", chipid, cmi_hdl_coreid(hdl),
  80                     (u_longlong_t)cap & MCG_CAP_COUNT_MASK,
  81                     AMD_MCA_BANK_COUNT);
  82                 return (ENOTSUP);
  83         }
  84
  85         ao = *datap = kmem_zalloc(sizeof (ao_ms_data_t), KM_SLEEP);
  86         cmi_hdl_hold(hdl);      /* release in fini */
  87         ao->ao_ms_hdl = hdl;
  88
  89         /*
  90          * Allocate the chipshared structure if it appears not to have been
  91          * allocated already (by a sibling core).  Install the newly
  92          * allocated pointer atomically in case a sibling core beats
  93          * us to it.
  94          */
  95         if ((sp = ao_shared[chipid]) == NULL) {
  96                 sp = kmem_zalloc(sizeof (struct ao_chipshared), KM_SLEEP);
  97                 sp->aos_chiprev = cmi_hdl_chiprev(hdl);
  98                 membar_producer();
  99
 100                 osp = atomic_cas_ptr(&ao_shared[chipid], NULL, sp);
 101                 if (osp != NULL) {
 102                         kmem_free(sp, sizeof (struct ao_chipshared));
 103                         sp = osp;
 104                 }
 105         }
 106         ao->ao_ms_shared = sp;
 107
 108         return (0);
 109 }
 110
 111 /*ARGSUSED*/
 112 void
 113 ao_ms_post_mpstartup(cmi_hdl_t hdl)
 114 {
 115         (void) ddi_install_driver("mc-amd");
 116 }
 117
 118 cms_api_ver_t _cms_api_version = CMS_API_VERSION_2;
 119
 120 const cms_ops_t _cms_ops = {
 121         ao_ms_init,                     /* cms_init */
 122         ao_ms_post_startup,             /* cms_post_startup */
 123         ao_ms_post_mpstartup,           /* cms_post_mpstartup */
 124         NULL,                           /* cms_logout_size */
 125         ao_ms_mcgctl_val,               /* cms_mcgctl_val */
 126         ao_ms_bankctl_skipinit,         /* cms_bankctl_skipinit */
 127         ao_ms_bankctl_val,              /* cms_bankctl_val */
 128         NULL,                           /* cms_bankstatus_skipinit */
 129         NULL,                           /* cms_bankstatus_val */
 130         ao_ms_mca_init,                 /* cms_mca_init */
 131         ao_ms_poll_ownermask,           /* cms_poll_ownermask */
 132         NULL,                           /* cms_bank_logout */
 133         ao_ms_error_action,             /* cms_error_action */
 134         ao_ms_disp_match,               /* cms_disp_match */
 135         ao_ms_ereport_class,            /* cms_ereport_class */
 136         NULL,                           /* cms_ereport_detector */
 137         ao_ms_ereport_includestack,     /* cms_ereport_includestack */
 138         ao_ms_ereport_add_logout,       /* cms_ereport_add_logout */
 139         ao_ms_msrinject,                /* cms_msrinject */
 140         NULL,                           /* cms_fini */
 141 };
 142
 143 static struct modlcpu modlcpu = {
 144         &mod_cpuops,
 145         "AMD Athlon64/Opteron Model-Specific Support"
 146 };
 147
 148 static struct modlinkage modlinkage = {
 149         MODREV_1,
 150         (void *)&modlcpu,
 151         NULL
 152 };
 153
 154 int
 155 _init(void)
 156 {
 157         return (mod_install(&modlinkage));
 158 }
 159
 160 int
 161 _info(struct modinfo *modinfop)
 162 {
 163         return (mod_info(&modlinkage, modinfop));
 164 }
 165
 166 int
 167 _fini(void)
 168 {
 169         return (mod_remove(&modlinkage));
 170 }