1 /*- 2 * Copyright (c) 2016 Chelsio Communications, Inc. 3 * All rights reserved. 4 * Written by: John Baldwin <jhb@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #include <sys/param.h> 30 #include <sys/endian.h> 31 #include <sys/pciio.h> 32 #include <sys/queue.h> 33 #include <err.h> 34 #include <fcntl.h> 35 #include <stdbool.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 39 #include <x86/iommu/intel_reg.h> 40 41 #include "acpidump.h" 42 43 int tflag; 44 int vflag; 45 46 static uint32_t 47 read_4(char *regs, size_t offset) 48 { 49 return *(uint32_t *)(regs + offset); 50 } 51 52 static uint64_t 53 read_8(char *regs, size_t offset) 54 { 55 return *(uint64_t *)(regs + offset); 56 } 57 58 static struct pci_conf * 59 pci_find_conf(int segment, int bus, int slot, int func) 60 { 61 static int pcifd = -1; 62 static struct pci_conf conf; 63 struct pci_conf_io pc; 64 struct pci_match_conf patterns[1]; 65 66 if (pcifd == -1) { 67 pcifd = open("/dev/pci", O_RDONLY); 68 if (pcifd < 0) 69 err(1, "Failed to open /dev/pci"); 70 } 71 72 bzero(&pc, sizeof(pc)); 73 pc.match_buf_len = sizeof(conf); 74 pc.matches = &conf; 75 bzero(&patterns, sizeof(patterns)); 76 patterns[0].pc_sel.pc_domain = segment; 77 patterns[0].pc_sel.pc_bus = bus; 78 patterns[0].pc_sel.pc_dev = slot; 79 patterns[0].pc_sel.pc_func = func; 80 patterns[0].flags = PCI_GETCONF_MATCH_DOMAIN | 81 PCI_GETCONF_MATCH_BUS | PCI_GETCONF_MATCH_DEV | 82 PCI_GETCONF_MATCH_FUNC; 83 pc.num_patterns = 1; 84 pc.pat_buf_len = sizeof(patterns); 85 pc.patterns = patterns; 86 if (ioctl(pcifd, PCIOCGETCONF, &pc) == -1) 87 err(1, "ioctl(PCIOCGETCONF)"); 88 89 if (pc.status != PCI_GETCONF_LAST_DEVICE || 90 pc.num_matches == 0) 91 return (NULL); 92 93 return (&conf); 94 } 95 96 static void 97 dump_context_table(int segment, int bus, uint64_t base_addr) 98 { 99 struct dmar_ctx_entry *ctx; 100 struct pci_conf *conf; 101 bool printed; 102 int idx; 103 104 printed = false; 105 ctx = acpi_map_physical(base_addr, DMAR_PAGE_SIZE); 106 for (idx = 0; idx < DMAR_CTX_CNT; idx++) { 107 if (!(ctx[idx].ctx1 & DMAR_CTX1_P)) 108 continue; 109 if (!printed) { 110 printf("\tPCI bus %d:\n", bus); 111 printed = true; 112 } 113 114 /* Check for ARI device first. */ 115 conf = pci_find_conf(segment, bus, 0, idx); 116 if (conf == NULL) 117 conf = pci_find_conf(segment, bus, idx >> 3, idx & 7); 118 if (conf != NULL) { 119 printf("\t { %d,%d }", conf->pc_sel.pc_dev, 120 conf->pc_sel.pc_func); 121 if (conf->pd_name[0] != '\0') 122 printf(" (%s%lu)", conf->pd_name, 123 conf->pd_unit); 124 } else 125 printf("\t { %d,%d } (absent)", idx >> 3, 126 idx & 7); 127 if (ctx[idx].ctx1 & DMAR_CTX1_FPD) 128 printf(" FPD"); 129 switch (ctx[idx].ctx1 & 0xc) { 130 case DMAR_CTX1_T_UNTR: 131 printf(" UNTR"); 132 break; 133 case DMAR_CTX1_T_TR: 134 printf(" TR"); 135 break; 136 case DMAR_CTX1_T_PASS: 137 printf(" PASS"); 138 break; 139 default: 140 printf(" TT3?"); 141 break; 142 } 143 printf(" SLPT %#jx", (uintmax_t)(ctx[idx].ctx1 & 144 DMAR_CTX1_ASR_MASK)); 145 printf(" domain %d", (int)DMAR_CTX2_GET_DID(ctx[idx].ctx2)); 146 printf("\n"); 147 } 148 } 149 150 static void 151 handle_drhd(int segment, uint64_t base_addr) 152 { 153 struct dmar_root_entry *root_table; 154 char *regs; 155 uint64_t rtaddr; 156 uint32_t gsts, ver; 157 bool extended; 158 int bus; 159 160 regs = acpi_map_physical(base_addr, 4096); 161 162 ver = read_4(regs, DMAR_VER_REG); 163 gsts = read_4(regs, DMAR_GSTS_REG); 164 printf("drhd @ %#jx (version %d.%d) PCI segment %d%s:\n", 165 (uintmax_t)base_addr, DMAR_MAJOR_VER(ver), DMAR_MINOR_VER(ver), 166 segment, gsts & DMAR_GSTS_TES ? "" : " (disabled)"); 167 if ((gsts & (DMAR_GSTS_TES | DMAR_GSTS_RTPS)) != 168 (DMAR_GSTS_TES | DMAR_GSTS_RTPS)) 169 return; 170 rtaddr = read_8(regs, DMAR_RTADDR_REG); 171 extended = (rtaddr & DMAR_RTADDR_RTT) != 0; 172 printf(" %sroot table @ 0x%#jx\n", extended ? "extended " : "", 173 rtaddr & DMAR_RTADDR_RTA_MASK); 174 root_table = acpi_map_physical(rtaddr & DMAR_RTADDR_RTA_MASK, 4096); 175 for (bus = 0; bus < 255; bus++) { 176 if (extended) { 177 #ifdef notyet 178 if (root_table[bus].r1 & DMAR_ROOT_R1_P) 179 dump_ext_context_table(segment, bus, 180 root_table[bus].r1 & DMAR_ROOT_R1_CTP_MASK, 181 false); 182 if (root_table[bus].r2 & DMAR_ROOT_R1_P) 183 dump_ext_context_table(segment, bus, 184 root_table[bus].r2 & DMAR_ROOT_R1_CTP_MASK, 185 true); 186 #endif 187 } else if (root_table[bus].r1 & DMAR_ROOT_R1_P) 188 dump_context_table(segment, bus, root_table[bus].r1 & 189 DMAR_ROOT_R1_CTP_MASK); 190 } 191 } 192 193 /* Borrowed from acpi.c in acpidump: */ 194 195 static void 196 acpi_handle_dmar_drhd(ACPI_DMAR_HARDWARE_UNIT *drhd) 197 { 198 199 handle_drhd(drhd->Segment, drhd->Address); 200 } 201 202 static int 203 acpi_handle_dmar_remapping_structure(void *addr, int remaining) 204 { 205 ACPI_DMAR_HEADER *hdr = addr; 206 207 if (remaining < (int)sizeof(ACPI_DMAR_HEADER)) 208 return (-1); 209 210 if (remaining < hdr->Length) 211 return (-1); 212 213 switch (hdr->Type) { 214 case ACPI_DMAR_TYPE_HARDWARE_UNIT: 215 acpi_handle_dmar_drhd(addr); 216 break; 217 } 218 return (hdr->Length); 219 } 220 221 static void 222 acpi_handle_dmar(ACPI_TABLE_HEADER *sdp) 223 { 224 char *cp; 225 int remaining, consumed; 226 ACPI_TABLE_DMAR *dmar; 227 228 dmar = (ACPI_TABLE_DMAR *)sdp; 229 remaining = sdp->Length - sizeof(ACPI_TABLE_DMAR); 230 while (remaining > 0) { 231 cp = (char *)sdp + sdp->Length - remaining; 232 consumed = acpi_handle_dmar_remapping_structure(cp, remaining); 233 if (consumed <= 0) 234 break; 235 else 236 remaining -= consumed; 237 } 238 } 239 240 static ACPI_TABLE_HEADER * 241 acpi_map_sdt(vm_offset_t pa) 242 { 243 ACPI_TABLE_HEADER *sp; 244 245 sp = acpi_map_physical(pa, sizeof(ACPI_TABLE_HEADER)); 246 sp = acpi_map_physical(pa, sp->Length); 247 return (sp); 248 } 249 250 static void 251 walk_rsdt(ACPI_TABLE_HEADER *rsdp) 252 { 253 ACPI_TABLE_HEADER *sdp; 254 ACPI_TABLE_RSDT *rsdt; 255 ACPI_TABLE_XSDT *xsdt; 256 vm_offset_t addr; 257 int addr_size, entries, i; 258 259 if (memcmp(rsdp->Signature, "RSDT", 4) != 0) 260 addr_size = sizeof(uint32_t); 261 else 262 addr_size = sizeof(uint64_t); 263 rsdt = (ACPI_TABLE_RSDT *)rsdp; 264 xsdt = (ACPI_TABLE_XSDT *)rsdp; 265 entries = (rsdp->Length - sizeof(ACPI_TABLE_HEADER)) / addr_size; 266 for (i = 0; i < entries; i++) { 267 if (addr_size == 4) 268 addr = le32toh(rsdt->TableOffsetEntry[i]); 269 else 270 addr = le64toh(xsdt->TableOffsetEntry[i]); 271 if (addr == 0) 272 continue; 273 sdp = (ACPI_TABLE_HEADER *)acpi_map_sdt(addr); 274 if (acpi_checksum(sdp, sdp->Length)) { 275 continue; 276 } 277 if (!memcmp(sdp->Signature, ACPI_SIG_DMAR, 4)) 278 acpi_handle_dmar(sdp); 279 } 280 } 281 282 int 283 main(int argc __unused, char *argv[] __unused) 284 { 285 ACPI_TABLE_HEADER *rsdt; 286 287 rsdt = sdt_load_devmem(); 288 walk_rsdt(rsdt); 289 return 0; 290 } 291