/*-
* Copyright (c) 2016 Chelsio Communications, Inc.
* All rights reserved.
* Written by: John Baldwin <jhb@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/endian.h>
#include <sys/pciio.h>
#include <sys/queue.h>
#include <err.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <x86/iommu/intel_reg.h>
#include "acpidump.h"
int tflag;
int vflag;
static uint32_t
read_4(char *regs, size_t offset)
{
return *(uint32_t *)(regs + offset);
}
static uint64_t
read_8(char *regs, size_t offset)
{
return *(uint64_t *)(regs + offset);
}
static struct pci_conf *
pci_find_conf(int segment, int bus, int slot, int func)
{
static int pcifd = -1;
static struct pci_conf conf;
struct pci_conf_io pc;
struct pci_match_conf patterns[1];
if (pcifd == -1) {
pcifd = open("/dev/pci", O_RDONLY);
if (pcifd < 0)
err(1, "Failed to open /dev/pci");
}
bzero(&pc, sizeof(pc));
pc.match_buf_len = sizeof(conf);
pc.matches = &conf;
bzero(&patterns, sizeof(patterns));
patterns[0].pc_sel.pc_domain = segment;
patterns[0].pc_sel.pc_bus = bus;
patterns[0].pc_sel.pc_dev = slot;
patterns[0].pc_sel.pc_func = func;
patterns[0].flags = PCI_GETCONF_MATCH_DOMAIN |
PCI_GETCONF_MATCH_BUS | PCI_GETCONF_MATCH_DEV |
PCI_GETCONF_MATCH_FUNC;
pc.num_patterns = 1;
pc.pat_buf_len = sizeof(patterns);
pc.patterns = patterns;
if (ioctl(pcifd, PCIOCGETCONF, &pc) == -1)
err(1, "ioctl(PCIOCGETCONF)");
if (pc.status != PCI_GETCONF_LAST_DEVICE ||
pc.num_matches == 0)
return (NULL);
return (&conf);
}
static void
dump_context_table(int segment, int bus, uint64_t base_addr)
{
struct dmar_ctx_entry *ctx;
struct pci_conf *conf;
bool printed;
int idx;
printed = false;
ctx = acpi_map_physical(base_addr, DMAR_PAGE_SIZE);
for (idx = 0; idx < DMAR_CTX_CNT; idx++) {
if (!(ctx[idx].ctx1 & DMAR_CTX1_P))
continue;
if (!printed) {
printf("\tPCI bus %d:\n", bus);
printed = true;
}
/* Check for ARI device first. */
conf = pci_find_conf(segment, bus, 0, idx);
if (conf == NULL)
conf = pci_find_conf(segment, bus, idx >> 3, idx & 7);
if (conf != NULL) {
printf("\t { %d,%d }", conf->pc_sel.pc_dev,
conf->pc_sel.pc_func);
if (conf->pd_name[0] != '\0')
printf(" (%s%lu)", conf->pd_name,
conf->pd_unit);
} else
printf("\t { %d,%d } (absent)", idx >> 3,
idx & 7);
if (ctx[idx].ctx1 & DMAR_CTX1_FPD)
printf(" FPD");
switch (ctx[idx].ctx1 & 0xc) {
case DMAR_CTX1_T_UNTR:
printf(" UNTR");
break;
case DMAR_CTX1_T_TR:
printf(" TR");
break;
case DMAR_CTX1_T_PASS:
printf(" PASS");
break;
default:
printf(" TT3?");
break;
}
printf(" SLPT %#jx", (uintmax_t)(ctx[idx].ctx1 &
DMAR_CTX1_ASR_MASK));
printf(" domain %d", (int)DMAR_CTX2_GET_DID(ctx[idx].ctx2));
printf("\n");
}
}
static void
handle_drhd(int segment, uint64_t base_addr)
{
struct dmar_root_entry *root_table;
char *regs;
uint64_t rtaddr;
uint32_t gsts, ver;
bool extended;
int bus;
regs = acpi_map_physical(base_addr, 4096);
ver = read_4(regs, DMAR_VER_REG);
gsts = read_4(regs, DMAR_GSTS_REG);
printf("drhd @ %#jx (version %d.%d) PCI segment %d%s:\n",
(uintmax_t)base_addr, DMAR_MAJOR_VER(ver), DMAR_MINOR_VER(ver),
segment, gsts & DMAR_GSTS_TES ? "" : " (disabled)");
if ((gsts & (DMAR_GSTS_TES | DMAR_GSTS_RTPS)) !=
(DMAR_GSTS_TES | DMAR_GSTS_RTPS))
return;
rtaddr = read_8(regs, DMAR_RTADDR_REG);
extended = (rtaddr & DMAR_RTADDR_RTT) != 0;
printf(" %sroot table @ 0x%#jx\n", extended ? "extended " : "",
rtaddr & DMAR_RTADDR_RTA_MASK);
root_table = acpi_map_physical(rtaddr & DMAR_RTADDR_RTA_MASK, 4096);
for (bus = 0; bus < 255; bus++) {
if (extended) {
#ifdef notyet
if (root_table[bus].r1 & DMAR_ROOT_R1_P)
dump_ext_context_table(segment, bus,
root_table[bus].r1 & DMAR_ROOT_R1_CTP_MASK,
false);
if (root_table[bus].r2 & DMAR_ROOT_R1_P)
dump_ext_context_table(segment, bus,
root_table[bus].r2 & DMAR_ROOT_R1_CTP_MASK,
true);
#endif
} else if (root_table[bus].r1 & DMAR_ROOT_R1_P)
dump_context_table(segment, bus, root_table[bus].r1 &
DMAR_ROOT_R1_CTP_MASK);
}
}
/* Borrowed from acpi.c in acpidump: */
static void
acpi_handle_dmar_drhd(ACPI_DMAR_HARDWARE_UNIT *drhd)
{
handle_drhd(drhd->Segment, drhd->Address);
}
static int
acpi_handle_dmar_remapping_structure(void *addr, int remaining)
{
ACPI_DMAR_HEADER *hdr = addr;
if (remaining < (int)sizeof(ACPI_DMAR_HEADER))
return (-1);
if (remaining < hdr->Length)
return (-1);
switch (hdr->Type) {
case ACPI_DMAR_TYPE_HARDWARE_UNIT:
acpi_handle_dmar_drhd(addr);
break;
}
return (hdr->Length);
}
static void
acpi_handle_dmar(ACPI_TABLE_HEADER *sdp)
{
char *cp;
int remaining, consumed;
ACPI_TABLE_DMAR *dmar;
dmar = (ACPI_TABLE_DMAR *)sdp;
remaining = sdp->Length - sizeof(ACPI_TABLE_DMAR);
while (remaining > 0) {
cp = (char *)sdp + sdp->Length - remaining;
consumed = acpi_handle_dmar_remapping_structure(cp, remaining);
if (consumed <= 0)
break;
else
remaining -= consumed;
}
}
static ACPI_TABLE_HEADER *
acpi_map_sdt(vm_offset_t pa)
{
ACPI_TABLE_HEADER *sp;
sp = acpi_map_physical(pa, sizeof(ACPI_TABLE_HEADER));
sp = acpi_map_physical(pa, sp->Length);
return (sp);
}
static void
walk_rsdt(ACPI_TABLE_HEADER *rsdp)
{
ACPI_TABLE_HEADER *sdp;
ACPI_TABLE_RSDT *rsdt;
ACPI_TABLE_XSDT *xsdt;
vm_offset_t addr;
int addr_size, entries, i;
if (memcmp(rsdp->Signature, "RSDT", 4) != 0)
addr_size = sizeof(uint32_t);
else
addr_size = sizeof(uint64_t);
rsdt = (ACPI_TABLE_RSDT *)rsdp;
xsdt = (ACPI_TABLE_XSDT *)rsdp;
entries = (rsdp->Length - sizeof(ACPI_TABLE_HEADER)) / addr_size;
for (i = 0; i < entries; i++) {
if (addr_size == 4)
addr = le32toh(rsdt->TableOffsetEntry[i]);
else
addr = le64toh(xsdt->TableOffsetEntry[i]);
if (addr == 0)
continue;
sdp = (ACPI_TABLE_HEADER *)acpi_map_sdt(addr);
if (acpi_checksum(sdp, sdp->Length)) {
continue;
}
if (!memcmp(sdp->Signature, ACPI_SIG_DMAR, 4))
acpi_handle_dmar(sdp);
}
}
int
main(int argc __unused, char *argv[] __unused)
{
ACPI_TABLE_HEADER *rsdt;
rsdt = sdt_load_devmem();
walk_rsdt(rsdt);
return 0;
}