[SeaBIOS] [PATCH 2/3] AMD IOMMU support
Eduard - Gabriel Munteanu
eduard.munteanu at linux360.ro
Fri Feb 4 00:24:14 CET 2011
This initializes the AMD IOMMU and creates ACPI tables for it.
Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu at linux360.ro>
---
src/acpi.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
src/config.h | 3 ++
src/pci_ids.h | 1 +
src/pci_regs.h | 1 +
src/pciinit.c | 29 +++++++++++++++++++
5 files changed, 118 insertions(+), 0 deletions(-)
diff --git a/src/acpi.c b/src/acpi.c
index 18830dc..fca152c 100644
--- a/src/acpi.c
+++ b/src/acpi.c
@@ -196,6 +196,36 @@ struct srat_memory_affinity
u32 reserved3[2];
} PACKED;
+/*
+ * IVRS (I/O Virtualization Reporting Structure) table.
+ *
+ * Describes the AMD IOMMU, as per:
+ * "AMD I/O Virtualization Technology (IOMMU) Specification", rev 1.26
+ */
+
+struct ivrs_ivhd
+{
+ u8 type;
+ u8 flags;
+ u16 length;
+ u16 devid;
+ u16 capab_off;
+ u32 iommu_base_low;
+ u32 iommu_base_high;
+ u16 pci_seg_group;
+ u16 iommu_info;
+ u32 reserved;
+ u8 entry[0];
+} PACKED;
+
+struct ivrs_table
+{
+ ACPI_TABLE_HEADER_DEF /* ACPI common table header. */
+ u32 iv_info;
+ u32 reserved[2];
+ struct ivrs_ivhd ivhd;
+} PACKED;
+
#include "acpi-dsdt.hex"
static void
@@ -579,6 +609,59 @@ build_srat(void)
return srat;
}
+#define IVRS_SIGNATURE 0x53525649 // IVRS
+#define IVRS_MAX_DEVS 32
+static void *
+build_ivrs(void)
+{
+ int iommu_bdf, iommu_cap;
+ int bdf, max, i;
+ struct ivrs_table *ivrs;
+ struct ivrs_ivhd *ivhd;
+
+ /* Note this currently works for a single IOMMU! */
+ iommu_bdf = pci_find_class(PCI_CLASS_SYSTEM_IOMMU);
+ if (iommu_bdf < 0)
+ return NULL;
+ iommu_cap = pci_find_capability(iommu_bdf, PCI_CAP_ID_SEC);
+ if (iommu_cap < 0)
+ return NULL;
+
+ ivrs = malloc_high(sizeof(struct ivrs_table) + 4 * IVRS_MAX_DEVS);
+ ivrs->iv_info = pci_config_readw(iommu_bdf, iommu_cap + 0x12) & ~0x000F;
+
+ ivhd = &ivrs->ivhd;
+ ivhd->type = 0x10;
+ ivhd->flags = 0;
+ ivhd->length = sizeof(struct ivrs_ivhd);
+ ivhd->devid = iommu_bdf;
+ ivhd->capab_off = iommu_cap;
+ ivhd->iommu_base_low = pci_config_readl(iommu_bdf, iommu_cap + 0x04) &
+ 0xFFFFFFFE;
+ ivhd->iommu_base_high = pci_config_readl(iommu_bdf, iommu_cap + 0x08);
+ ivhd->pci_seg_group = 0;
+ ivhd->iommu_info = 0;
+ ivhd->reserved = 0;
+
+ i = 0;
+ foreachpci(bdf, max) {
+ if (bdf == ivhd->devid)
+ continue;
+ ivhd->entry[4 * i + 0] = 2;
+ ivhd->entry[4 * i + 1] = bdf & 0xFF;
+ ivhd->entry[4 * i + 2] = (bdf >> 8) & 0xFF;
+ ivhd->entry[4 * i + 3] = ~(1 << 3);
+ ivhd->length += 4;
+ if (++i >= IVRS_MAX_DEVS)
+ break;
+ }
+
+ build_header((void *) ivrs, IVRS_SIGNATURE,
+ sizeof(struct ivrs_table) + 4 * i, 1);
+
+ return ivrs;
+}
+
static const struct pci_device_id acpi_find_tbl[] = {
/* PIIX4 Power Management device. */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, NULL),
@@ -625,6 +708,7 @@ acpi_bios_init(void)
ACPI_INIT_TABLE(build_madt());
ACPI_INIT_TABLE(build_hpet());
ACPI_INIT_TABLE(build_srat());
+ ACPI_INIT_TABLE(build_ivrs());
u16 i, external_tables = qemu_cfg_acpi_additional_tables();
diff --git a/src/config.h b/src/config.h
index 6356941..0ba5723 100644
--- a/src/config.h
+++ b/src/config.h
@@ -172,6 +172,9 @@
#define BUILD_APIC_ADDR 0xfee00000
#define BUILD_IOAPIC_ADDR 0xfec00000
+#define BUILD_AMD_IOMMU_START 0xfed00000
+#define BUILD_AMD_IOMMU_END 0xfee00000 /* BUILD_APIC_ADDR */
+
#define BUILD_SMM_INIT_ADDR 0x38000
#define BUILD_SMM_ADDR 0xa8000
#define BUILD_SMM_SIZE 0x8000
diff --git a/src/pci_ids.h b/src/pci_ids.h
index e1cded2..3cc3c6e 100644
--- a/src/pci_ids.h
+++ b/src/pci_ids.h
@@ -72,6 +72,7 @@
#define PCI_CLASS_SYSTEM_RTC 0x0803
#define PCI_CLASS_SYSTEM_PCI_HOTPLUG 0x0804
#define PCI_CLASS_SYSTEM_SDHCI 0x0805
+#define PCI_CLASS_SYSTEM_IOMMU 0x0806
#define PCI_CLASS_SYSTEM_OTHER 0x0880
#define PCI_BASE_CLASS_INPUT 0x09
diff --git a/src/pci_regs.h b/src/pci_regs.h
index e5effd4..bfac824 100644
--- a/src/pci_regs.h
+++ b/src/pci_regs.h
@@ -208,6 +208,7 @@
#define PCI_CAP_ID_SHPC 0x0C /* PCI Standard Hot-Plug Controller */
#define PCI_CAP_ID_SSVID 0x0D /* Bridge subsystem vendor/device ID */
#define PCI_CAP_ID_AGP3 0x0E /* AGP Target PCI-PCI bridge */
+#define PCI_CAP_ID_SEC 0x0F /* Secure Device (AMD IOMMU) */
#define PCI_CAP_ID_EXP 0x10 /* PCI Express */
#define PCI_CAP_ID_MSIX 0x11 /* MSI-X */
#define PCI_CAP_LIST_NEXT 1 /* Next capability in the list */
diff --git a/src/pciinit.c b/src/pciinit.c
index ee2e72d..4ebcfbe 100644
--- a/src/pciinit.c
+++ b/src/pciinit.c
@@ -21,6 +21,8 @@ static struct pci_region pci_bios_io_region;
static struct pci_region pci_bios_mem_region;
static struct pci_region pci_bios_prefmem_region;
+static u32 amd_iommu_addr;
+
/* host irqs corresponding to PCI irqs A-D */
const u8 pci_irqs[4] = {
10, 10, 11, 11
@@ -256,6 +258,27 @@ static void apple_macio_init(u16 bdf, void *arg)
pci_set_io_region_addr(bdf, 0, 0x80800000);
}
+static void amd_iommu_init(u16 bdf, void *arg)
+{
+ int cap;
+ u32 base_addr;
+
+ cap = pci_find_capability(bdf, PCI_CAP_ID_SEC);
+ if (cap < 0) {
+ return;
+ }
+
+ if (amd_iommu_addr >= BUILD_AMD_IOMMU_END) {
+ return;
+ }
+ base_addr = amd_iommu_addr;
+ amd_iommu_addr += 0x4000;
+
+ pci_config_writel(bdf, cap + 0x0C, 0);
+ pci_config_writel(bdf, cap + 0x08, 0);
+ pci_config_writel(bdf, cap + 0x04, base_addr | 1);
+}
+
static const struct pci_device_id pci_class_tbl[] = {
/* STORAGE IDE */
PCI_DEVICE_CLASS(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1,
@@ -279,6 +302,10 @@ static const struct pci_device_id pci_class_tbl[] = {
PCI_DEVICE_CLASS(PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_BRIDGE_PCI,
pci_bios_init_device_bridge),
+ /* AMD IOMMU */
+ PCI_DEVICE_CLASS(PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_SYSTEM_IOMMU,
+ amd_iommu_init),
+
/* default */
PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID, pci_bios_allocate_regions),
@@ -408,6 +435,8 @@ pci_setup(void)
pci_region_init(&pci_bios_prefmem_region,
BUILD_PCIPREFMEM_START, BUILD_PCIPREFMEM_END - 1);
+ amd_iommu_addr = BUILD_AMD_IOMMU_START;
+
pci_bios_init_bus();
int bdf, max;
--
1.7.3.4
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