freebsd-dev/sys/x86/acpica/srat.c

364 lines
9.4 KiB
C
Raw Normal View History

/*-
* Copyright (c) 2010 Advanced Computing Technologies LLC
* Written by: John H. Baldwin <jhb@FreeBSD.org>
* All rights reserved.
*
* 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/bus.h>
#include <sys/kernel.h>
#include <sys/smp.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_param.h>
#include <vm/vm_phys.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/actables.h>
#include <machine/intr_machdep.h>
#include <machine/apicvar.h>
#include <dev/acpica/acpivar.h>
#if VM_NDOMAIN > 1
struct cpu_info {
int enabled:1;
int has_memory:1;
int domain;
} cpus[MAX_APIC_ID + 1];
struct mem_affinity mem_info[VM_PHYSSEG_MAX + 1];
int num_mem;
static ACPI_TABLE_SRAT *srat;
static vm_paddr_t srat_physaddr;
static void srat_walk_table(acpi_subtable_handler *handler, void *arg);
/*
* Returns true if a memory range overlaps with at least one range in
* phys_avail[].
*/
static int
overlaps_phys_avail(vm_paddr_t start, vm_paddr_t end)
{
int i;
for (i = 0; phys_avail[i] != 0 && phys_avail[i + 1] != 0; i += 2) {
if (phys_avail[i + 1] < start)
continue;
if (phys_avail[i] < end)
return (1);
break;
}
return (0);
}
static void
srat_parse_entry(ACPI_SUBTABLE_HEADER *entry, void *arg)
{
ACPI_SRAT_CPU_AFFINITY *cpu;
ACPI_SRAT_X2APIC_CPU_AFFINITY *x2apic;
ACPI_SRAT_MEM_AFFINITY *mem;
int domain, i, slot;
switch (entry->Type) {
case ACPI_SRAT_TYPE_CPU_AFFINITY:
cpu = (ACPI_SRAT_CPU_AFFINITY *)entry;
domain = cpu->ProximityDomainLo |
cpu->ProximityDomainHi[0] << 8 |
cpu->ProximityDomainHi[1] << 16 |
cpu->ProximityDomainHi[2] << 24;
if (bootverbose)
printf("SRAT: Found CPU APIC ID %u domain %d: %s\n",
cpu->ApicId, domain,
(cpu->Flags & ACPI_SRAT_CPU_ENABLED) ?
"enabled" : "disabled");
if (!(cpu->Flags & ACPI_SRAT_CPU_ENABLED))
break;
KASSERT(!cpus[cpu->ApicId].enabled,
("Duplicate local APIC ID %u", cpu->ApicId));
cpus[cpu->ApicId].domain = domain;
cpus[cpu->ApicId].enabled = 1;
break;
case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
x2apic = (ACPI_SRAT_X2APIC_CPU_AFFINITY *)entry;
if (bootverbose)
printf("SRAT: Found CPU APIC ID %u domain %d: %s\n",
x2apic->ApicId, x2apic->ProximityDomain,
(x2apic->Flags & ACPI_SRAT_CPU_ENABLED) ?
"enabled" : "disabled");
if (!(x2apic->Flags & ACPI_SRAT_CPU_ENABLED))
break;
KASSERT(!cpus[x2apic->ApicId].enabled,
("Duplicate local APIC ID %u", x2apic->ApicId));
cpus[x2apic->ApicId].domain = x2apic->ProximityDomain;
cpus[x2apic->ApicId].enabled = 1;
break;
case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
mem = (ACPI_SRAT_MEM_AFFINITY *)entry;
if (bootverbose)
printf(
"SRAT: Found memory domain %d addr %jx len %jx: %s\n",
mem->ProximityDomain, (uintmax_t)mem->BaseAddress,
(uintmax_t)mem->Length,
(mem->Flags & ACPI_SRAT_MEM_ENABLED) ?
"enabled" : "disabled");
if (!(mem->Flags & ACPI_SRAT_MEM_ENABLED))
break;
if (!overlaps_phys_avail(mem->BaseAddress,
mem->BaseAddress + mem->Length)) {
printf("SRAT: Ignoring memory at addr %jx\n",
(uintmax_t)mem->BaseAddress);
break;
}
if (num_mem == VM_PHYSSEG_MAX) {
printf("SRAT: Too many memory regions\n");
*(int *)arg = ENXIO;
break;
}
slot = num_mem;
for (i = 0; i < num_mem; i++) {
if (mem_info[i].end <= mem->BaseAddress)
continue;
if (mem_info[i].start <
(mem->BaseAddress + mem->Length)) {
printf("SRAT: Overlapping memory entries\n");
*(int *)arg = ENXIO;
return;
}
slot = i;
}
for (i = num_mem; i > slot; i--)
mem_info[i] = mem_info[i - 1];
mem_info[slot].start = mem->BaseAddress;
mem_info[slot].end = mem->BaseAddress + mem->Length;
mem_info[slot].domain = mem->ProximityDomain;
num_mem++;
break;
}
}
/*
* Ensure each memory domain has at least one CPU and that each CPU
* has at least one memory domain.
*/
static int
check_domains(void)
{
int found, i, j;
for (i = 0; i < num_mem; i++) {
found = 0;
for (j = 0; j <= MAX_APIC_ID; j++)
if (cpus[j].enabled &&
cpus[j].domain == mem_info[i].domain) {
cpus[j].has_memory = 1;
found++;
}
if (!found) {
printf("SRAT: No CPU found for memory domain %d\n",
mem_info[i].domain);
return (ENXIO);
}
}
for (i = 0; i <= MAX_APIC_ID; i++)
if (cpus[i].enabled && !cpus[i].has_memory) {
printf("SRAT: No memory found for CPU %d\n", i);
return (ENXIO);
}
return (0);
}
/*
* Check that the SRAT memory regions cover all of the regions in
* phys_avail[].
*/
static int
check_phys_avail(void)
{
vm_paddr_t address;
int i, j;
/* j is the current offset into phys_avail[]. */
address = phys_avail[0];
j = 0;
for (i = 0; i < num_mem; i++) {
/*
* Consume as many phys_avail[] entries as fit in this
* region.
*/
while (address >= mem_info[i].start &&
address <= mem_info[i].end) {
/*
* If we cover the rest of this phys_avail[] entry,
* advance to the next entry.
*/
if (phys_avail[j + 1] <= mem_info[i].end) {
j += 2;
if (phys_avail[j] == 0 &&
phys_avail[j + 1] == 0) {
return (0);
}
address = phys_avail[j];
} else
address = mem_info[i].end + 1;
}
}
printf("SRAT: No memory region found for %jx - %jx\n",
(uintmax_t)phys_avail[j], (uintmax_t)phys_avail[j + 1]);
return (ENXIO);
}
/*
* Renumber the memory domains to be compact and zero-based if not
* already. Returns an error if there are too many domains.
*/
static int
renumber_domains(void)
{
int domains[VM_PHYSSEG_MAX];
int ndomain, i, j, slot;
/* Enumerate all the domains. */
ndomain = 0;
for (i = 0; i < num_mem; i++) {
/* See if this domain is already known. */
for (j = 0; j < ndomain; j++) {
if (domains[j] >= mem_info[i].domain)
break;
}
if (j < ndomain && domains[j] == mem_info[i].domain)
continue;
/* Insert the new domain at slot 'j'. */
slot = j;
for (j = ndomain; j > slot; j--)
domains[j] = domains[j - 1];
domains[slot] = mem_info[i].domain;
ndomain++;
if (ndomain > VM_NDOMAIN) {
printf("SRAT: Too many memory domains\n");
return (EFBIG);
}
}
/* Renumber each domain to its index in the sorted 'domains' list. */
for (i = 0; i < ndomain; i++) {
/*
* If the domain is already the right value, no need
* to renumber.
*/
if (domains[i] == i)
continue;
/* Walk the cpu[] and mem_info[] arrays to renumber. */
for (j = 0; j < num_mem; j++)
if (mem_info[j].domain == domains[i])
mem_info[j].domain = i;
for (j = 0; j <= MAX_APIC_ID; j++)
if (cpus[j].enabled && cpus[j].domain == domains[i])
cpus[j].domain = i;
}
return (0);
}
/*
* Look for an ACPI System Resource Affinity Table ("SRAT")
*/
static void
parse_srat(void *dummy)
{
int error;
if (resource_disabled("srat", 0))
return;
srat_physaddr = acpi_find_table(ACPI_SIG_SRAT);
if (srat_physaddr == 0)
return;
/*
* Make a pass over the table to populate the cpus[] and
* mem_info[] tables.
*/
srat = acpi_map_table(srat_physaddr, ACPI_SIG_SRAT);
error = 0;
srat_walk_table(srat_parse_entry, &error);
acpi_unmap_table(srat);
srat = NULL;
if (error || check_domains() != 0 || check_phys_avail() != 0 ||
renumber_domains() != 0) {
srat_physaddr = 0;
return;
}
/* Point vm_phys at our memory affinity table. */
mem_affinity = mem_info;
}
SYSINIT(parse_srat, SI_SUB_VM - 1, SI_ORDER_FIRST, parse_srat, NULL);
static void
srat_walk_table(acpi_subtable_handler *handler, void *arg)
{
acpi_walk_subtables(srat + 1, (char *)srat + srat->Header.Length,
handler, arg);
}
/*
* Setup per-CPU ACPI IDs.
*/
static void
srat_set_cpus(void *dummy)
{
struct cpu_info *cpu;
struct pcpu *pc;
u_int i;
if (srat_physaddr == 0)
return;
for (i = 0; i < MAXCPU; i++) {
if (CPU_ABSENT(i))
continue;
pc = pcpu_find(i);
KASSERT(pc != NULL, ("no pcpu data for CPU %u", i));
cpu = &cpus[pc->pc_apic_id];
if (!cpu->enabled)
panic("SRAT: CPU with APIC ID %u is not known",
pc->pc_apic_id);
pc->pc_domain = cpu->domain;
if (bootverbose)
printf("SRAT: CPU %u has memory domain %d\n", i,
cpu->domain);
}
}
SYSINIT(srat_set_cpus, SI_SUB_CPU, SI_ORDER_ANY, srat_set_cpus, NULL);
#endif /* VM_NDOMAIN > 1 */