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 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * The CPU module for the AMD Athlon64 and Opteron processors 31 */ 32 33 #include <sys/types.h> 34 #include <sys/cmn_err.h> 35 #include <sys/sunddi.h> 36 #include <sys/cpu_module_impl.h> 37 #include <sys/cpuvar.h> 38 #include <sys/x86_archext.h> 39 #include <sys/kmem.h> 40 #include <sys/pghw.h> 41 #include <sys/modctl.h> 42 #include <sys/mc.h> 43 #include <sys/mca_x86.h> 44 45 #include "ao.h" 46 47 static struct ao_chipshared *ao_shared[NCPU]; 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 static int 57 ao_init(cpu_t *cp, void **datap) 58 { 59 uint_t chipid = pg_plat_hw_instance_id(CPU, PGHW_CHIP); 60 struct ao_chipshared *sp, *osp; 61 ao_data_t *ao; 62 uint64_t cap; 63 64 if (cpuid_getmodel(cp) >= ao_model_limit) 65 return (ENOTSUP); 66 67 if (!(x86_feature & X86_MCA)) 68 return (ENOTSUP); 69 70 cap = rdmsr(IA32_MSR_MCG_CAP); 71 if (!(cap & MCG_CAP_CTL_P)) 72 return (ENOTSUP); 73 74 /* 75 * Arrange to fallback to generic.cpu if the bank count is not 76 * as expected. We're not silent about this - if we have X86_MCA 77 * and MCG_CAP_CTL_P then we appear not to be virtualized. 78 */ 79 if ((cap & MCG_CAP_COUNT_MASK) != AMD_MCA_BANK_COUNT) { 80 cmn_err(CE_WARN, "CPU %d has %llu MCA banks; expected %u: " 81 "disabling AMD-specific MCA support on this CPU", 82 cp->cpu_id, (u_longlong_t)cap & MCG_CAP_COUNT_MASK, 83 AMD_MCA_BANK_COUNT); 84 return (ENOTSUP); 85 } 86 87 ao = *datap = kmem_zalloc(sizeof (ao_data_t), KM_SLEEP); 88 ao->ao_cpu = cp; 89 90 /* 91 * Allocate the chipshared structure if it appears not to have been 92 * allocated already (by a sibling core). Install the newly 93 * allocated pointer atomically in case a sibling core beats 94 * us to it. 95 */ 96 if ((sp = ao_shared[chipid]) == NULL) { 97 sp = kmem_zalloc(sizeof (struct ao_chipshared), KM_SLEEP); 98 osp = atomic_cas_ptr(&ao_shared[chipid], NULL, sp); 99 if (osp != NULL) { 100 kmem_free(sp, sizeof (struct ao_chipshared)); 101 sp = osp; 102 } 103 } 104 ao->ao_shared = sp; 105 106 return (0); 107 } 108 109 /*ARGSUSED*/ 110 static void 111 ao_post_mpstartup(void *data) 112 { 113 (void) ddi_install_driver("mc-amd"); 114 } 115 116 static void 117 ao_fini(void *data) 118 { 119 kmem_free(data, sizeof (ao_data_t)); 120 } 121 122 const cmi_ops_t _cmi_ops = { 123 ao_init, 124 ao_mca_post_init, 125 ao_post_mpstartup, 126 ao_fini, 127 ao_faulted_enter, 128 ao_faulted_exit, 129 ao_scrubber_enable, 130 ao_mca_init, 131 ao_mca_trap, 132 ao_mca_inject, 133 ao_mca_poke, 134 ao_mc_register, 135 ao_mc_getops 136 }; 137 138 static struct modlcpu modlcpu = { 139 &mod_cpuops, 140 "AMD Athlon64/Opteron CPU Module" 141 }; 142 143 static struct modlinkage modlinkage = { 144 MODREV_1, 145 (void *)&modlcpu, 146 NULL 147 }; 148 149 int 150 _init(void) 151 { 152 int err; 153 154 ao_mca_queue = errorq_create("ao_mca_queue", 155 ao_mca_drain, NULL, AO_MCA_MAX_ERRORS * (max_ncpus + 1), 156 sizeof (ao_cpu_logout_t), 1, ERRORQ_VITAL); 157 158 if (ao_mca_queue == NULL) 159 return (EAGAIN); /* errorq_create() logs a message for us */ 160 161 if ((err = mod_install(&modlinkage)) != 0) { 162 errorq_destroy(ao_mca_queue); 163 ao_mca_queue = NULL; 164 } 165 166 return (err); 167 } 168 169 int 170 _info(struct modinfo *modinfop) 171 { 172 return (mod_info(&modlinkage, modinfop)); 173 } 174 175 int 176 _fini(void) 177 { 178 int err; 179 180 if ((err = mod_remove(&modlinkage)) == 0) 181 errorq_destroy(ao_mca_queue); 182 183 return (err); 184 } 185