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/param.h> 29 #include <sys/endian.h> 30 #include <sys/pciio.h> 31 #include <sys/queue.h> 32 #include <err.h> 33 #include <fcntl.h> 34 #include <stdbool.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 38 #include <x86/iommu/intel_reg.h> 39 40 #include "acpidump.h" 41 42 int tflag; 43 int vflag; 44 45 static uint32_t 46 read_4(char *regs, size_t offset) 47 { 48 return *(uint32_t *)(regs + offset); 49 } 50 51 static uint64_t 52 read_8(char *regs, size_t offset) 53 { 54 return *(uint64_t *)(regs + offset); 55 } 56 57 static struct pci_conf * 58 pci_find_conf(int segment, int bus, int slot, int func) 59 { 60 static int pcifd = -1; 61 static struct pci_conf conf; 62 struct pci_conf_io pc; 63 struct pci_match_conf patterns[1]; 64 65 if (pcifd == -1) { 66 pcifd = open("/dev/pci", O_RDONLY); 67 if (pcifd < 0) 68 err(1, "Failed to open /dev/pci"); 69 } 70 71 bzero(&pc, sizeof(pc)); 72 pc.match_buf_len = sizeof(conf); 73 pc.matches = &conf; 74 bzero(&patterns, sizeof(patterns)); 75 patterns[0].pc_sel.pc_domain = segment; 76 patterns[0].pc_sel.pc_bus = bus; 77 patterns[0].pc_sel.pc_dev = slot; 78 patterns[0].pc_sel.pc_func = func; 79 patterns[0].flags = PCI_GETCONF_MATCH_DOMAIN | 80 PCI_GETCONF_MATCH_BUS | PCI_GETCONF_MATCH_DEV | 81 PCI_GETCONF_MATCH_FUNC; 82 pc.num_patterns = 1; 83 pc.pat_buf_len = sizeof(patterns); 84 pc.patterns = patterns; 85 if (ioctl(pcifd, PCIOCGETCONF, &pc) == -1) 86 err(1, "ioctl(PCIOCGETCONF)"); 87 88 if (pc.status != PCI_GETCONF_LAST_DEVICE || 89 pc.num_matches == 0) 90 return (NULL); 91 92 return (&conf); 93 } 94 95 static void 96 dump_context_table(int segment, int bus, uint64_t base_addr) 97 { 98 struct dmar_ctx_entry *ctx; 99 struct pci_conf *conf; 100 bool printed; 101 int idx; 102 103 printed = false; 104 ctx = acpi_map_physical(base_addr, DMAR_PAGE_SIZE); 105 for (idx = 0; idx < DMAR_CTX_CNT; idx++) { 106 if (!(ctx[idx].ctx1 & DMAR_CTX1_P)) 107 continue; 108 if (!printed) { 109 printf("\tPCI bus %d:\n", bus); 110 printed = true; 111 } 112 113 /* Check for ARI device first. */ 114 conf = pci_find_conf(segment, bus, 0, idx); 115 if (conf == NULL) 116 conf = pci_find_conf(segment, bus, idx >> 3, idx & 7); 117 if (conf != NULL) { 118 printf("\t { %d,%d }", conf->pc_sel.pc_dev, 119 conf->pc_sel.pc_func); 120 if (conf->pd_name[0] != '\0') 121 printf(" (%s%lu)", conf->pd_name, 122 conf->pd_unit); 123 } else 124 printf("\t { %d,%d } (absent)", idx >> 3, 125 idx & 7); 126 if (ctx[idx].ctx1 & DMAR_CTX1_FPD) 127 printf(" FPD"); 128 switch (ctx[idx].ctx1 & 0xc) { 129 case DMAR_CTX1_T_UNTR: 130 printf(" UNTR"); 131 break; 132 case DMAR_CTX1_T_TR: 133 printf(" TR"); 134 break; 135 case DMAR_CTX1_T_PASS: 136 printf(" PASS"); 137 break; 138 default: 139 printf(" TT3?"); 140 break; 141 } 142 printf(" SLPT %#jx", (uintmax_t)(ctx[idx].ctx1 & 143 DMAR_CTX1_ASR_MASK)); 144 printf(" domain %d", (int)DMAR_CTX2_GET_DID(ctx[idx].ctx2)); 145 printf("\n"); 146 } 147 } 148 149 static void 150 handle_drhd(int segment, uint64_t base_addr) 151 { 152 struct dmar_root_entry *root_table; 153 char *regs; 154 uint64_t rtaddr; 155 uint32_t gsts, ver; 156 bool extended; 157 int bus; 158 159 regs = acpi_map_physical(base_addr, 4096); 160 161 ver = read_4(regs, DMAR_VER_REG); 162 gsts = read_4(regs, DMAR_GSTS_REG); 163 printf("drhd @ %#jx (version %d.%d) PCI segment %d%s:\n", 164 (uintmax_t)base_addr, DMAR_MAJOR_VER(ver), DMAR_MINOR_VER(ver), 165 segment, gsts & DMAR_GSTS_TES ? "" : " (disabled)"); 166 if ((gsts & (DMAR_GSTS_TES | DMAR_GSTS_RTPS)) != 167 (DMAR_GSTS_TES | DMAR_GSTS_RTPS)) 168 return; 169 rtaddr = read_8(regs, DMAR_RTADDR_REG); 170 extended = (rtaddr & DMAR_RTADDR_RTT) != 0; 171 printf(" %sroot table @ 0x%#jx\n", extended ? "extended " : "", 172 rtaddr & DMAR_RTADDR_RTA_MASK); 173 root_table = acpi_map_physical(rtaddr & DMAR_RTADDR_RTA_MASK, 4096); 174 for (bus = 0; bus < 255; bus++) { 175 if (extended) { 176 #ifdef notyet 177 if (root_table[bus].r1 & DMAR_ROOT_R1_P) 178 dump_ext_context_table(segment, bus, 179 root_table[bus].r1 & DMAR_ROOT_R1_CTP_MASK, 180 false); 181 if (root_table[bus].r2 & DMAR_ROOT_R1_P) 182 dump_ext_context_table(segment, bus, 183 root_table[bus].r2 & DMAR_ROOT_R1_CTP_MASK, 184 true); 185 #endif 186 } else if (root_table[bus].r1 & DMAR_ROOT_R1_P) 187 dump_context_table(segment, bus, root_table[bus].r1 & 188 DMAR_ROOT_R1_CTP_MASK); 189 } 190 } 191 192 /* Borrowed from acpi.c in acpidump: */ 193 194 static void 195 acpi_handle_dmar_drhd(ACPI_DMAR_HARDWARE_UNIT *drhd) 196 { 197 198 handle_drhd(drhd->Segment, drhd->Address); 199 } 200 201 static int 202 acpi_handle_dmar_remapping_structure(void *addr, int remaining) 203 { 204 ACPI_DMAR_HEADER *hdr = addr; 205 206 if (remaining < (int)sizeof(ACPI_DMAR_HEADER)) 207 return (-1); 208 209 if (remaining < hdr->Length) 210 return (-1); 211 212 switch (hdr->Type) { 213 case ACPI_DMAR_TYPE_HARDWARE_UNIT: 214 acpi_handle_dmar_drhd(addr); 215 break; 216 } 217 return (hdr->Length); 218 } 219 220 static void 221 acpi_handle_dmar(ACPI_TABLE_HEADER *sdp) 222 { 223 char *cp; 224 int remaining, consumed; 225 ACPI_TABLE_DMAR *dmar; 226 227 dmar = (ACPI_TABLE_DMAR *)sdp; 228 remaining = sdp->Length - sizeof(ACPI_TABLE_DMAR); 229 while (remaining > 0) { 230 cp = (char *)sdp + sdp->Length - remaining; 231 consumed = acpi_handle_dmar_remapping_structure(cp, remaining); 232 if (consumed <= 0) 233 break; 234 else 235 remaining -= consumed; 236 } 237 } 238 239 static ACPI_TABLE_HEADER * 240 acpi_map_sdt(vm_offset_t pa) 241 { 242 ACPI_TABLE_HEADER *sp; 243 244 sp = acpi_map_physical(pa, sizeof(ACPI_TABLE_HEADER)); 245 sp = acpi_map_physical(pa, sp->Length); 246 return (sp); 247 } 248 249 static void 250 walk_rsdt(ACPI_TABLE_HEADER *rsdp) 251 { 252 ACPI_TABLE_HEADER *sdp; 253 ACPI_TABLE_RSDT *rsdt; 254 ACPI_TABLE_XSDT *xsdt; 255 vm_offset_t addr; 256 int addr_size, entries, i; 257 258 if (memcmp(rsdp->Signature, "RSDT", 4) != 0) 259 addr_size = sizeof(uint32_t); 260 else 261 addr_size = sizeof(uint64_t); 262 rsdt = (ACPI_TABLE_RSDT *)rsdp; 263 xsdt = (ACPI_TABLE_XSDT *)rsdp; 264 entries = (rsdp->Length - sizeof(ACPI_TABLE_HEADER)) / addr_size; 265 for (i = 0; i < entries; i++) { 266 if (addr_size == 4) 267 addr = le32toh(rsdt->TableOffsetEntry[i]); 268 else 269 addr = le64toh(xsdt->TableOffsetEntry[i]); 270 if (addr == 0) 271 continue; 272 sdp = (ACPI_TABLE_HEADER *)acpi_map_sdt(addr); 273 if (acpi_checksum(sdp, sdp->Length)) { 274 continue; 275 } 276 if (!memcmp(sdp->Signature, ACPI_SIG_DMAR, 4)) 277 acpi_handle_dmar(sdp); 278 } 279 } 280 281 int 282 main(int argc __unused, char *argv[] __unused) 283 { 284 ACPI_TABLE_HEADER *rsdt; 285 286 rsdt = sdt_load_devmem(); 287 walk_rsdt(rsdt); 288 return 0; 289 } 290