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ACPI: Add functions for DMAR I/O-APIC and HPET entries 

Refactor acpi_create_dmar_drhd_ds_pci() and add similar functions for
I/O-APICs and MSI capable HPETs. We violate the spec [1] here, which
talks about 16-bit source-ids spread over start_bus and path entries.
Intel actually uses bus/dev/fn identification for those devices too,
and so do we.

[1] Intel Virtualization Technology for Directed I/O
    Architecture Specification
    Document-Number: D51397

Change-Id: I0fce075961762610d44b5552b71e010511871fc2
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/12192
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@google.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Nico Huber 2015-10-26 12:03:54 +01:00 committed by Patrick Georgi
parent e561f35fa5
commit 6c4751d596
2 changed files with 41 additions and 10 deletions
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37
src/arch/x86/acpi.c
View File

@ -436,20 +436,45 @@ void acpi_dmar_drhd_fixup(unsigned long base, unsigned long current)
drhd->length = current - base;
}
unsigned long acpi_create_dmar_drhd_ds_pci(unsigned long current, u8 segment,
u8 dev, u8 fn)
static unsigned long acpi_create_dmar_drhd_ds(unsigned long current,
enum dev_scope_type type, u8 enumeration_id, u8 bus, u8 dev, u8 fn)
{
/* we don't support longer paths yet */
const size_t dev_scope_length = sizeof(dev_scope_t) + 2;
dev_scope_t *ds = (dev_scope_t *)current;
memset(ds, 0, sizeof(*ds));
ds->type = SCOPE_PCI_ENDPOINT;
ds->length = sizeof(*ds) + 2; /* we don't support longer paths yet */
ds->start_bus = segment;
memset(ds, 0, dev_scope_length);
ds->type = type;
ds->length = dev_scope_length;
ds->enumeration = enumeration_id;
ds->start_bus = bus;
ds->path[0].dev = dev;
ds->path[0].fn = fn;
return ds->length;
}
unsigned long acpi_create_dmar_drhd_ds_pci(unsigned long current, u8 bus,
u8 dev, u8 fn)
{
return acpi_create_dmar_drhd_ds(current,
SCOPE_PCI_ENDPOINT, 0, bus, dev, fn);
}
unsigned long acpi_create_dmar_drhd_ds_ioapic(unsigned long current,
u8 enumeration_id, u8 bus, u8 dev, u8 fn)
{
return acpi_create_dmar_drhd_ds(current,
SCOPE_IOAPIC, enumeration_id, bus, dev, fn);
}
unsigned long acpi_create_dmar_drhd_ds_msi_hpet(unsigned long current,
u8 enumeration_id, u8 bus, u8 dev, u8 fn)
{
return acpi_create_dmar_drhd_ds(current,
SCOPE_MSI_HPET, enumeration_id, bus, dev, fn);
}
/* http://h21007.www2.hp.com/portal/download/files/unprot/Itanium/slit.pdf */
void acpi_create_slit(acpi_slit_t *slit,
unsigned long (*acpi_fill_slit)(unsigned long current))

10
src/arch/x86/include/arch/acpi.h
View File

@ -553,8 +553,14 @@ void acpi_create_dmar(acpi_dmar_t *dmar, enum dmar_flags flags,
unsigned long acpi_create_dmar_drhd(unsigned long current, u8 flags,
u16 segment, u32 bar);
void acpi_dmar_drhd_fixup(unsigned long base, unsigned long current);
unsigned long acpi_create_dmar_drhd_ds_pci(unsigned long current, u8 segment,
u8 dev, u8 fn);
unsigned long acpi_create_dmar_drhd_ds_pci(unsigned long current,
u8 bus, u8 dev, u8 fn);
unsigned long acpi_create_dmar_drhd_ds_ioapic(unsigned long current,
u8 enumeration_id,
u8 bus, u8 dev, u8 fn);
unsigned long acpi_create_dmar_drhd_ds_msi_hpet(unsigned long current,
u8 enumeration_id,
u8 bus, u8 dev, u8 fn);
void acpi_write_hest(acpi_hest_t *hest,
unsigned long (*acpi_fill_hest)(acpi_hest_t *hest));