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Date: Tue, 26 May 2015 20:49:20 +0800
From: Hanjun Guo <hanjun.guo@...aro.org>
To: Bjorn Helgaas <bhelgaas@...gle.com>, Arnd Bergmann <arnd@...db.de>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: Jiang Liu <jiang.liu@...ux.intel.com>,
Liviu Dudau <Liviu.Dudau@....com>,
Thomas Gleixner <tglx@...utronix.de>,
Yijing Wang <wangyijing@...wei.com>,
Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
Tomasz Nowicki <tomasz.nowicki@...aro.org>,
Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
Mark Salter <msalter@...hat.com>, linux-pci@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-acpi@...r.kernel.org,
linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org,
Hanjun Guo <hanjun.guo@...aro.org>
Subject: [PATCH 07/11] x86, pci: mmconfig_{32,64}.c code refactoring - remove code duplication.
From: Tomasz Nowicki <tomasz.nowicki@...aro.org>
mmconfig_64.c version is going to be default implementation for arch
agnostic low-level direct PCI config space accessors for ECAM dirver.
However, now it initialize raw_pci_ext_ops pointer which is x86 specific
code only. Moreover, mmconfig_32.c is doing the same thing at the same time.
Move it to mmconfig_shared.c so it becomes common for both and
mmconfig_64.c turns out to be purely arch agnostic.
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@...aro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
---
arch/x86/pci/mmconfig-shared.c | 10 ++++++++--
arch/x86/pci/mmconfig_32.c | 10 ++--------
arch/x86/pci/mmconfig_64.c | 11 ++---------
include/linux/ecam.h | 5 +++++
4 files changed, 17 insertions(+), 19 deletions(-)
diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 6fa3080..8938db3 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -29,6 +29,11 @@
static bool pci_mmcfg_running_state;
static bool pci_mmcfg_arch_init_failed;
+const struct pci_raw_ops pci_mmcfg = {
+ .read = pci_mmcfg_read,
+ .write = pci_mmcfg_write,
+};
+
static u32
pci_mmconfig_amd_read(int len, void __iomem *addr)
{
@@ -555,9 +560,10 @@ static void __init __pci_mmcfg_init(int early)
}
}
- if (pci_mmcfg_arch_init())
+ if (pci_mmcfg_arch_init()) {
+ raw_pci_ext_ops = &pci_mmcfg;
pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
- else {
+ } else {
free_all_mmcfg();
pci_mmcfg_arch_init_failed = true;
}
diff --git a/arch/x86/pci/mmconfig_32.c b/arch/x86/pci/mmconfig_32.c
index 5cf6291..7a050cb 100644
--- a/arch/x86/pci/mmconfig_32.c
+++ b/arch/x86/pci/mmconfig_32.c
@@ -50,7 +50,7 @@ static void pci_exp_set_dev_base(unsigned int base, int bus, int devfn)
}
}
-static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
+int pci_mmcfg_read(unsigned int seg, unsigned int bus,
unsigned int devfn, int reg, int len, u32 *value)
{
unsigned long flags;
@@ -79,7 +79,7 @@ err: *value = -1;
return 0;
}
-static int pci_mmcfg_write(unsigned int seg, unsigned int bus,
+int pci_mmcfg_write(unsigned int seg, unsigned int bus,
unsigned int devfn, int reg, int len, u32 value)
{
unsigned long flags;
@@ -106,15 +106,9 @@ static int pci_mmcfg_write(unsigned int seg, unsigned int bus,
return 0;
}
-const struct pci_raw_ops pci_mmcfg = {
- .read = pci_mmcfg_read,
- .write = pci_mmcfg_write,
-};
-
int __init pci_mmcfg_arch_init(void)
{
printk(KERN_INFO "PCI: Using MMCONFIG for extended config space\n");
- raw_pci_ext_ops = &pci_mmcfg;
return 1;
}
diff --git a/arch/x86/pci/mmconfig_64.c b/arch/x86/pci/mmconfig_64.c
index b62ff18..fd857ea 100644
--- a/arch/x86/pci/mmconfig_64.c
+++ b/arch/x86/pci/mmconfig_64.c
@@ -25,7 +25,7 @@ static char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned i
return NULL;
}
-static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
+int pci_mmcfg_read(unsigned int seg, unsigned int bus,
unsigned int devfn, int reg, int len, u32 *value)
{
char __iomem *addr;
@@ -49,7 +49,7 @@ err: *value = -1;
return 0;
}
-static int pci_mmcfg_write(unsigned int seg, unsigned int bus,
+int pci_mmcfg_write(unsigned int seg, unsigned int bus,
unsigned int devfn, int reg, int len, u32 value)
{
char __iomem *addr;
@@ -71,11 +71,6 @@ static int pci_mmcfg_write(unsigned int seg, unsigned int bus,
return 0;
}
-const struct pci_raw_ops pci_mmcfg = {
- .read = pci_mmcfg_read,
- .write = pci_mmcfg_write,
-};
-
static void __iomem *mcfg_ioremap(struct pci_mmcfg_region *cfg)
{
void __iomem *addr;
@@ -101,8 +96,6 @@ int __init pci_mmcfg_arch_init(void)
return 0;
}
- raw_pci_ext_ops = &pci_mmcfg;
-
return 1;
}
diff --git a/include/linux/ecam.h b/include/linux/ecam.h
index 2387df5..fba5d6b 100644
--- a/include/linux/ecam.h
+++ b/include/linux/ecam.h
@@ -47,5 +47,10 @@ extern struct list_head pci_mmcfg_list;
#define PCI_MMCFG_BUS_OFFSET(bus) ((bus) << 20)
+int pci_mmcfg_read(unsigned int seg, unsigned int bus,
+ unsigned int devfn, int reg, int len, u32 *value);
+int pci_mmcfg_write(unsigned int seg, unsigned int bus,
+ unsigned int devfn, int reg, int len, u32 value);
+
#endif /* __KERNEL__ */
#endif /* __ECAM_H */
--
1.9.1
--
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