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authorTomasz Nowicki <tn@semihalf.com>2015-12-23 10:55:16 +0100
committerTomasz Nowicki <tn@semihalf.com>2016-01-22 12:18:33 +0100
commite28c293427838525cdc529c1c0e222ee1bd3027d (patch)
treeac9b8d2c65237b3b01b2ee2dd418c3082b79132b
parent7d39f0ce69e2ac36533fcb66037fd6929dd19c3e (diff)
downloadleg-kernel-e28c293427838525cdc529c1c0e222ee1bd3027d.tar.gz
x86, pci, ecam: mmconfig_64.c becomes default implementation for ECAM driver.
Hosts with custom ECAM hooks (like 32bit x86) should select ARCH_HAS_CUSTOM_PCI_ECAM. Otherwise, host will use generic version provided by this patch (like 64bit x86 does). Note, we leaved x86-specific PCI config accessors in corresponding files. Signed-off-by: Tomasz Nowicki <tn@semihalf.com> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Tested-by: Jeremy Linton <jeremy.linton@arm.com>
-rw-r--r--arch/x86/Kconfig1
-rw-r--r--arch/x86/include/asm/pci_x86.h4
-rw-r--r--arch/x86/pci/mmconfig_64.c55
-rw-r--r--drivers/acpi/mcfg.c2
-rw-r--r--drivers/pci/Kconfig3
-rw-r--r--drivers/pci/ecam.c59
-rw-r--r--include/linux/ecam.h6
7 files changed, 68 insertions, 62 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 350bd528bd0a..102d7d1c958f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -30,6 +30,7 @@ config X86
select ARCH_HAS_PMEM_API if X86_64
select ARCH_HAS_MMIO_FLUSH
select ARCH_HAS_SG_CHAIN
+ select ARCH_HAS_CUSTOM_PCI_ECAM if X86_32
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
select ARCH_MIGHT_HAVE_PC_PARPORT
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
index 0482807490dc..be091b47ad95 100644
--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -123,10 +123,6 @@ extern int pci_legacy_init(void);
extern int pcibios_fixup_irq(struct pci_dev *dev, u8 pin);
/* pci-mmconfig.c */
-extern int __init pci_mmcfg_arch_init(void);
-extern void __init pci_mmcfg_arch_free(void);
-extern int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg);
-extern void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg);
extern int pci_mmconfig_insert(struct device *dev, u16 seg, u8 start, u8 end,
phys_addr_t addr);
diff --git a/arch/x86/pci/mmconfig_64.c b/arch/x86/pci/mmconfig_64.c
index d0c48eb65762..fd356cc0a43c 100644
--- a/arch/x86/pci/mmconfig_64.c
+++ b/arch/x86/pci/mmconfig_64.c
@@ -90,58 +90,3 @@ int pci_mmcfg_write(unsigned int seg, unsigned int bus,
return 0;
}
-
-static void __iomem *mcfg_ioremap(struct pci_mmcfg_region *cfg)
-{
- void __iomem *addr;
- u64 start, size;
- int num_buses;
-
- start = cfg->address + PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
- num_buses = cfg->end_bus - cfg->start_bus + 1;
- size = PCI_MMCFG_BUS_OFFSET(num_buses);
- addr = ioremap_nocache(start, size);
- if (addr)
- addr -= PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
- return addr;
-}
-
-int __init pci_mmcfg_arch_init(void)
-{
- struct pci_mmcfg_region *cfg;
-
- list_for_each_entry(cfg, &pci_mmcfg_list, list)
- if (pci_mmcfg_arch_map(cfg)) {
- pci_mmcfg_arch_free();
- return 0;
- }
-
- return 1;
-}
-
-void __init pci_mmcfg_arch_free(void)
-{
- struct pci_mmcfg_region *cfg;
-
- list_for_each_entry(cfg, &pci_mmcfg_list, list)
- pci_mmcfg_arch_unmap(cfg);
-}
-
-int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg)
-{
- cfg->virt = mcfg_ioremap(cfg);
- if (!cfg->virt) {
- pr_err(PREFIX "can't map MMCONFIG at %pR\n", &cfg->res);
- return -ENOMEM;
- }
-
- return 0;
-}
-
-void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg)
-{
- if (cfg && cfg->virt) {
- iounmap(cfg->virt + PCI_MMCFG_BUS_OFFSET(cfg->start_bus));
- cfg->virt = NULL;
- }
-}
diff --git a/drivers/acpi/mcfg.c b/drivers/acpi/mcfg.c
index fad99172f7c8..745b83ec2c43 100644
--- a/drivers/acpi/mcfg.c
+++ b/drivers/acpi/mcfg.c
@@ -10,8 +10,6 @@
#include <linux/acpi.h>
#include <linux/ecam.h>
-#include <asm/pci_x86.h> /* Temp hack before refactoring arch-specific calls */
-
#define PREFIX "MCFG: "
int __init acpi_parse_mcfg(struct acpi_table_header *header)
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 9950248fcec2..b2e27c8d0d87 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -33,6 +33,9 @@ config PCI_ECAM
config HAVE_PCI_ECAM
bool
+config ARCH_HAS_CUSTOM_PCI_ECAM
+ bool
+
config PCI_DEBUG
bool "PCI Debugging"
depends on PCI && DEBUG_KERNEL
diff --git a/drivers/pci/ecam.c b/drivers/pci/ecam.c
index d221dba03b3e..8a5eef78e255 100644
--- a/drivers/pci/ecam.c
+++ b/drivers/pci/ecam.c
@@ -16,7 +16,6 @@
#include <linux/ecam.h>
#include <asm/io.h>
-#include <asm/pci_x86.h> /* Temp hack before refactoring arch-specific calls */
#define PREFIX "PCI: "
@@ -24,6 +23,64 @@ static DEFINE_MUTEX(pci_mmcfg_lock);
LIST_HEAD(pci_mmcfg_list);
+#ifndef CONFIG_ARCH_HAS_CUSTOM_PCI_ECAM
+
+static void __iomem *mcfg_ioremap(struct pci_mmcfg_region *cfg)
+{
+ void __iomem *addr;
+ u64 start, size;
+ int num_buses;
+
+ start = cfg->address + PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
+ num_buses = cfg->end_bus - cfg->start_bus + 1;
+ size = PCI_MMCFG_BUS_OFFSET(num_buses);
+ addr = ioremap_nocache(start, size);
+ if (addr)
+ addr -= PCI_MMCFG_BUS_OFFSET(cfg->start_bus);
+ return addr;
+}
+
+int __init pci_mmcfg_arch_init(void)
+{
+ struct pci_mmcfg_region *cfg;
+
+ list_for_each_entry(cfg, &pci_mmcfg_list, list)
+ if (pci_mmcfg_arch_map(cfg)) {
+ pci_mmcfg_arch_free();
+ return 0;
+ }
+
+ return 1;
+}
+
+void __init pci_mmcfg_arch_free(void)
+{
+ struct pci_mmcfg_region *cfg;
+
+ list_for_each_entry(cfg, &pci_mmcfg_list, list)
+ pci_mmcfg_arch_unmap(cfg);
+}
+
+int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg)
+{
+ cfg->virt = mcfg_ioremap(cfg);
+ if (!cfg->virt) {
+ pr_err(PREFIX "can't map MMCONFIG at %pR\n", &cfg->res);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg)
+{
+ if (cfg && cfg->virt) {
+ iounmap(cfg->virt + PCI_MMCFG_BUS_OFFSET(cfg->start_bus));
+ cfg->virt = NULL;
+ }
+}
+#endif
+
static void __init pci_mmconfig_remove(struct pci_mmcfg_region *cfg)
{
if (cfg->res.parent)
diff --git a/include/linux/ecam.h b/include/linux/ecam.h
index dec3b523d112..813acd13a999 100644
--- a/include/linux/ecam.h
+++ b/include/linux/ecam.h
@@ -29,6 +29,12 @@ void list_add_sorted(struct pci_mmcfg_region *new);
void free_all_mmcfg(void);
int pci_mmconfig_delete(u16 seg, u8 start, u8 end);
+/* Arch specific calls */
+int pci_mmcfg_arch_init(void);
+void pci_mmcfg_arch_free(void);
+int pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg);
+void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg);
+
extern struct list_head pci_mmcfg_list;
#define PCI_MMCFG_BUS_OFFSET(bus) ((bus) << 20)