1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2013, 2015 The FreeBSD Foundation 5 * 6 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 7 * under sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/param.h> 32 #include <sys/bus.h> 33 #include <sys/kernel.h> 34 #include <sys/lock.h> 35 #include <sys/malloc.h> 36 #include <sys/memdesc.h> 37 #include <sys/module.h> 38 #include <sys/mutex.h> 39 #include <sys/rman.h> 40 #include <sys/rwlock.h> 41 #include <sys/smp.h> 42 #include <sys/taskqueue.h> 43 #include <sys/tree.h> 44 #include <sys/vmem.h> 45 #include <vm/vm.h> 46 #include <vm/vm_extern.h> 47 #include <vm/vm_kern.h> 48 #include <vm/vm_object.h> 49 #include <vm/vm_page.h> 50 #include <vm/vm_pager.h> 51 #include <vm/vm_map.h> 52 #include <contrib/dev/acpica/include/acpi.h> 53 #include <contrib/dev/acpica/include/accommon.h> 54 #include <dev/acpica/acpivar.h> 55 #include <dev/pci/pcireg.h> 56 #include <dev/pci/pcivar.h> 57 #include <machine/bus.h> 58 #include <x86/include/busdma_impl.h> 59 #include <dev/iommu/busdma_iommu.h> 60 #include <x86/iommu/intel_reg.h> 61 #include <x86/iommu/intel_dmar.h> 62 63 typedef void (*dmar_quirk_cpu_fun)(struct dmar_unit *); 64 65 struct intel_dmar_quirk_cpu { 66 u_int ext_family; 67 u_int ext_model; 68 u_int family_code; 69 u_int model; 70 u_int stepping; 71 dmar_quirk_cpu_fun quirk; 72 const char *descr; 73 }; 74 75 typedef void (*dmar_quirk_nb_fun)(struct dmar_unit *, device_t nb); 76 77 struct intel_dmar_quirk_nb { 78 u_int dev_id; 79 u_int rev_no; 80 dmar_quirk_nb_fun quirk; 81 const char *descr; 82 }; 83 84 #define QUIRK_NB_ALL_REV 0xffffffff 85 86 static void 87 dmar_match_quirks(struct dmar_unit *dmar, 88 const struct intel_dmar_quirk_nb *nb_quirks, int nb_quirks_len, 89 const struct intel_dmar_quirk_cpu *cpu_quirks, int cpu_quirks_len) 90 { 91 device_t nb; 92 const struct intel_dmar_quirk_nb *nb_quirk; 93 const struct intel_dmar_quirk_cpu *cpu_quirk; 94 u_int p[4]; 95 u_int dev_id, rev_no; 96 u_int ext_family, ext_model, family_code, model, stepping; 97 int i; 98 99 if (nb_quirks != NULL) { 100 nb = pci_find_bsf(0, 0, 0); 101 if (nb != NULL) { 102 dev_id = pci_get_device(nb); 103 rev_no = pci_get_revid(nb); 104 for (i = 0; i < nb_quirks_len; i++) { 105 nb_quirk = &nb_quirks[i]; 106 if (nb_quirk->dev_id == dev_id && 107 (nb_quirk->rev_no == rev_no || 108 nb_quirk->rev_no == QUIRK_NB_ALL_REV)) { 109 if (bootverbose) { 110 device_printf(dmar->dev, 111 "NB IOMMU quirk %s\n", 112 nb_quirk->descr); 113 } 114 nb_quirk->quirk(dmar, nb); 115 } 116 } 117 } else { 118 device_printf(dmar->dev, "cannot find northbridge\n"); 119 } 120 } 121 if (cpu_quirks != NULL) { 122 do_cpuid(1, p); 123 ext_family = (p[0] & CPUID_EXT_FAMILY) >> 20; 124 ext_model = (p[0] & CPUID_EXT_MODEL) >> 16; 125 family_code = (p[0] & CPUID_FAMILY) >> 8; 126 model = (p[0] & CPUID_MODEL) >> 4; 127 stepping = p[0] & CPUID_STEPPING; 128 for (i = 0; i < cpu_quirks_len; i++) { 129 cpu_quirk = &cpu_quirks[i]; 130 if (cpu_quirk->ext_family == ext_family && 131 cpu_quirk->ext_model == ext_model && 132 cpu_quirk->family_code == family_code && 133 cpu_quirk->model == model && 134 (cpu_quirk->stepping == -1 || 135 cpu_quirk->stepping == stepping)) { 136 if (bootverbose) { 137 device_printf(dmar->dev, 138 "CPU IOMMU quirk %s\n", 139 cpu_quirk->descr); 140 } 141 cpu_quirk->quirk(dmar); 142 } 143 } 144 } 145 } 146 147 static void 148 nb_5400_no_low_high_prot_mem(struct dmar_unit *unit, device_t nb __unused) 149 { 150 151 unit->hw_cap &= ~(DMAR_CAP_PHMR | DMAR_CAP_PLMR); 152 } 153 154 static void 155 nb_no_ir(struct dmar_unit *unit, device_t nb __unused) 156 { 157 158 unit->hw_ecap &= ~(DMAR_ECAP_IR | DMAR_ECAP_EIM); 159 } 160 161 static void 162 nb_5500_no_ir_rev13(struct dmar_unit *unit, device_t nb) 163 { 164 u_int rev_no; 165 166 rev_no = pci_get_revid(nb); 167 if (rev_no <= 0x13) 168 nb_no_ir(unit, nb); 169 } 170 171 static const struct intel_dmar_quirk_nb pre_use_nb[] = { 172 { 173 .dev_id = 0x4001, .rev_no = 0x20, 174 .quirk = nb_5400_no_low_high_prot_mem, 175 .descr = "5400 E23" /* no low/high protected memory */ 176 }, 177 { 178 .dev_id = 0x4003, .rev_no = 0x20, 179 .quirk = nb_5400_no_low_high_prot_mem, 180 .descr = "5400 E23" /* no low/high protected memory */ 181 }, 182 { 183 .dev_id = 0x3403, .rev_no = QUIRK_NB_ALL_REV, 184 .quirk = nb_5500_no_ir_rev13, 185 .descr = "5500 E47, E53" /* interrupt remapping does not work */ 186 }, 187 { 188 .dev_id = 0x3405, .rev_no = QUIRK_NB_ALL_REV, 189 .quirk = nb_5500_no_ir_rev13, 190 .descr = "5500 E47, E53" /* interrupt remapping does not work */ 191 }, 192 { 193 .dev_id = 0x3405, .rev_no = 0x22, 194 .quirk = nb_no_ir, 195 .descr = "5500 E47, E53" /* interrupt remapping does not work */ 196 }, 197 { 198 .dev_id = 0x3406, .rev_no = QUIRK_NB_ALL_REV, 199 .quirk = nb_5500_no_ir_rev13, 200 .descr = "5500 E47, E53" /* interrupt remapping does not work */ 201 }, 202 }; 203 204 static void 205 cpu_e5_am9(struct dmar_unit *unit) 206 { 207 208 unit->hw_cap &= ~(0x3fULL << 48); 209 unit->hw_cap |= (9ULL << 48); 210 } 211 212 static const struct intel_dmar_quirk_cpu post_ident_cpu[] = { 213 { 214 .ext_family = 0, .ext_model = 2, .family_code = 6, .model = 13, 215 .stepping = 6, .quirk = cpu_e5_am9, 216 .descr = "E5 BT176" /* AM should be at most 9 */ 217 }, 218 }; 219 220 void 221 dmar_quirks_pre_use(struct iommu_unit *unit) 222 { 223 struct dmar_unit *dmar; 224 225 dmar = IOMMU2DMAR(unit); 226 227 if (!dmar_barrier_enter(dmar, DMAR_BARRIER_USEQ)) 228 return; 229 DMAR_LOCK(dmar); 230 dmar_match_quirks(dmar, pre_use_nb, nitems(pre_use_nb), 231 NULL, 0); 232 dmar_barrier_exit(dmar, DMAR_BARRIER_USEQ); 233 } 234 235 void 236 dmar_quirks_post_ident(struct dmar_unit *dmar) 237 { 238 239 dmar_match_quirks(dmar, NULL, 0, post_ident_cpu, 240 nitems(post_ident_cpu)); 241 } 242