[PATCH 02/11] x86/pci: Add support for Hygon's Dhyana Family 18h processor
From: Pu Wen
Date: Sat Jun 09 2018 - 09:32:11 EST
This patch enables the x86 PCI support to Hygon Family 18h CPU:
- AMD Northbridge
- Add PCI_DEVICE_ID_HYGON_18H_ROOT, PCI_DEVICE_ID_HYGON_18H_DF_F3
and PCI_DEVICE_ID_HYGON_18H_DF_F4 support in amd_nb.c
- PCI for X86
- Add Hygon Vendor ID(0x1D94) support.
- Add Hygon irq router support in pirq_routers arrays.
- Add Hygon support in amd_postcore_init(), early_root_info_init().
- APIC for X86
- Add Hygon support in modern_apic() and sync_Arb_IDs() as Hygon
processors are modern processors.
- Add Hygon support in detect_init_API().
Signed-off-by: Pu Wen <puwen@xxxxxxxx>
---
arch/x86/kernel/amd_nb.c | 11 ++++++++++-
arch/x86/kernel/apic/apic.c | 13 +++++++++++--
arch/x86/pci/amd_bus.c | 6 ++++--
arch/x86/pci/irq.c | 1 +
include/linux/pci_ids.h | 2 ++
5 files changed, 28 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c
index b481b95..054b7fa 100644
--- a/arch/x86/kernel/amd_nb.c
+++ b/arch/x86/kernel/amd_nb.c
@@ -20,6 +20,11 @@
#define PCI_DEVICE_ID_AMD_17H_M10H_DF_F3 0x15eb
#define PCI_DEVICE_ID_AMD_17H_M10H_DF_F4 0x15ec
+/* Hygon Family 18h follow AMD Family 17h's Device ID definition */
+#define PCI_DEVICE_ID_HYGON_18H_ROOT PCI_DEVICE_ID_AMD_17H_ROOT
+#define PCI_DEVICE_ID_HYGON_18H_DF_F3 PCI_DEVICE_ID_AMD_17H_DF_F3
+#define PCI_DEVICE_ID_HYGON_18H_DF_F4 PCI_DEVICE_ID_AMD_17H_DF_F4
+
/* Protect the PCI config register pairs used for SMN and DF indirect access. */
static DEFINE_MUTEX(smn_mutex);
@@ -28,6 +33,7 @@ static u32 *flush_words;
static const struct pci_device_id amd_root_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_ROOT) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_M10H_ROOT) },
+ { PCI_DEVICE(PCI_VENDOR_ID_HYGON, PCI_DEVICE_ID_HYGON_18H_ROOT) },
{}
};
@@ -45,6 +51,7 @@ const struct pci_device_id amd_nb_misc_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_M10H_DF_F3) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CNB17H_F3) },
+ { PCI_DEVICE(PCI_VENDOR_ID_HYGON, PCI_DEVICE_ID_HYGON_18H_DF_F3) },
{}
};
EXPORT_SYMBOL_GPL(amd_nb_misc_ids);
@@ -58,6 +65,7 @@ static const struct pci_device_id amd_nb_link_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_DF_F4) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_17H_M10H_DF_F4) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CNB17H_F4) },
+ { PCI_DEVICE(PCI_VENDOR_ID_HYGON, PCI_DEVICE_ID_HYGON_18H_DF_F4) },
{}
};
@@ -277,7 +285,8 @@ struct resource *amd_get_mmconfig_range(struct resource *res)
u64 base, msr;
unsigned int segn_busn_bits;
- if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
+ boot_cpu_data.x86_vendor != X86_VENDOR_HYGON)
return NULL;
/* assume all cpus from fam10h have mmconfig */
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 2aabd4c..d8b7ac1 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -223,6 +223,11 @@ static int modern_apic(void)
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
boot_cpu_data.x86 >= 0xf)
return 1;
+
+ /* Hygon systems use modern APIC */
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
+ return 1;
+
return lapic_get_version() >= 0x14;
}
@@ -1207,9 +1212,11 @@ void __init sync_Arb_IDs(void)
{
/*
* Unsupported on P4 - see Intel Dev. Manual Vol. 3, Ch. 8.6.1 And not
- * needed on AMD.
+ * needed on AMD or Hygon.
*/
- if (modern_apic() || boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+ if (modern_apic() ||
+ boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
+ boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
return;
/*
@@ -1908,6 +1915,8 @@ static int __init detect_init_APIC(void)
(boot_cpu_data.x86 >= 15))
break;
goto no_apic;
+ case X86_VENDOR_HYGON:
+ break;
case X86_VENDOR_INTEL:
if (boot_cpu_data.x86 == 6 || boot_cpu_data.x86 == 15 ||
(boot_cpu_data.x86 == 5 && boot_cpu_has(X86_FEATURE_APIC)))
diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c
index 649bdde..bfa50e6 100644
--- a/arch/x86/pci/amd_bus.c
+++ b/arch/x86/pci/amd_bus.c
@@ -93,7 +93,8 @@ static int __init early_root_info_init(void)
vendor = id & 0xffff;
device = (id>>16) & 0xffff;
- if (vendor != PCI_VENDOR_ID_AMD)
+ if (vendor != PCI_VENDOR_ID_AMD &&
+ vendor != PCI_VENDOR_ID_HYGON)
continue;
if (hb_probes[i].device == device) {
@@ -390,7 +391,8 @@ static int __init pci_io_ecs_init(void)
static int __init amd_postcore_init(void)
{
- if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
+ boot_cpu_data.x86_vendor != X86_VENDOR_HYGON)
return 0;
early_root_info_init();
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index 52e5510..63ff5e3 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -804,6 +804,7 @@ static __initdata struct irq_router_handler pirq_routers[] = {
{ PCI_VENDOR_ID_VLSI, vlsi_router_probe },
{ PCI_VENDOR_ID_SERVERWORKS, serverworks_router_probe },
{ PCI_VENDOR_ID_AMD, amd_router_probe },
+ { PCI_VENDOR_ID_HYGON, amd_router_probe },
{ PCI_VENDOR_ID_PICOPOWER, pico_router_probe },
/* Someone with docs needs to add the ATI Radeon IGP */
{ 0, NULL }
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index cc608fc5..efb5dfd 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -511,6 +511,8 @@
#define PCI_DEVICE_ID_AMI_MEGARAID 0x9010
#define PCI_DEVICE_ID_AMI_MEGARAID2 0x9060
+#define PCI_VENDOR_ID_HYGON 0x1d94
+
#define PCI_VENDOR_ID_AMD 0x1022
#define PCI_DEVICE_ID_AMD_K8_NB 0x1100
#define PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP 0x1101
--
2.7.4