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authorMyron Stowe <mstowe@redhat.com>2011-10-28 15:48:38 -0600
committerJesse Barnes <jbarnes@virtuousgeek.org>2012-01-06 12:10:42 -0800
commit96c5590058d7fded14f43af2ab521436cecf3125 (patch)
tree673577f86b1ee8886c27cc86333fdfdc6cc783ac /arch
parent9cdce18d6f0baae53f012fb3f50e66e7ff24c509 (diff)
downloadop-kernel-dev-96c5590058d7fded14f43af2ab521436cecf3125.zip
op-kernel-dev-96c5590058d7fded14f43af2ab521436cecf3125.tar.gz
PCI: Pull PCI 'latency timer' setup up into the core
The 'latency timer' of PCI devices, both Type 0 and Type 1, is setup in architecture-specific code [see: 'pcibios_set_master()']. There are two approaches being taken by all the architectures - check if the 'latency timer' is currently set between 16 and 255 and if not bring it within bounds, or, do nothing (and then there is the gratuitously different PA-RISC implementation). There is nothing architecture-specific about PCI's 'latency timer' so this patch pulls its setup functionality up into the PCI core by creating a generic 'pcibios_set_master()' function using the '__weak' attribute which can be used by all architectures as a default which, if necessary, can then be over-ridden by architecture-specific code. No functional change. Signed-off-by: Myron Stowe <myron.stowe@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/blackfin/include/asm/pci.h4
-rw-r--r--arch/frv/mb93090-mb00/pci-frv.c6
-rw-r--r--arch/frv/mb93090-mb00/pci-frv.h2
-rw-r--r--arch/h8300/include/asm/pci.h5
-rw-r--r--arch/mips/pci/pci.c6
-rw-r--r--arch/mn10300/unit-asb2305/pci-asb2305.c6
-rw-r--r--arch/mn10300/unit-asb2305/pci-asb2305.h2
-rw-r--r--arch/sh/drivers/pci/pci.c6
-rw-r--r--arch/x86/include/asm/pci_x86.h2
-rw-r--r--arch/x86/pci/i386.c6
10 files changed, 0 insertions, 45 deletions
diff --git a/arch/blackfin/include/asm/pci.h b/arch/blackfin/include/asm/pci.h
index 99cae2e..74352c4 100644
--- a/arch/blackfin/include/asm/pci.h
+++ b/arch/blackfin/include/asm/pci.h
@@ -10,10 +10,6 @@
#define PCIBIOS_MIN_IO 0x00001000
#define PCIBIOS_MIN_MEM 0x10000000
-static inline void pcibios_set_master(struct pci_dev *dev)
-{
- /* No special bus mastering setup handling */
-}
static inline void pcibios_penalize_isa_irq(int irq)
{
/* We don't do dynamic PCI IRQ allocation */
diff --git a/arch/frv/mb93090-mb00/pci-frv.c b/arch/frv/mb93090-mb00/pci-frv.c
index 6b4fb28..6a0cd64 100644
--- a/arch/frv/mb93090-mb00/pci-frv.c
+++ b/arch/frv/mb93090-mb00/pci-frv.c
@@ -195,12 +195,6 @@ void __init pcibios_resource_survey(void)
pcibios_assign_resources();
}
-/*
- * If we set up a device for bus mastering, we need to check the latency
- * timer as certain crappy BIOSes forget to set it properly.
- */
-unsigned int pcibios_max_latency = 255;
-
void pcibios_set_master(struct pci_dev *dev)
{
u8 lat;
diff --git a/arch/frv/mb93090-mb00/pci-frv.h b/arch/frv/mb93090-mb00/pci-frv.h
index f3fe5591..089eeba 100644
--- a/arch/frv/mb93090-mb00/pci-frv.h
+++ b/arch/frv/mb93090-mb00/pci-frv.h
@@ -26,8 +26,6 @@ extern unsigned int __nongpreldata pci_probe;
/* pci-frv.c */
-extern unsigned int pcibios_max_latency;
-
void pcibios_resource_survey(void);
/* pci-vdk.c */
diff --git a/arch/h8300/include/asm/pci.h b/arch/h8300/include/asm/pci.h
index cc97620..0b2acaa 100644
--- a/arch/h8300/include/asm/pci.h
+++ b/arch/h8300/include/asm/pci.h
@@ -9,11 +9,6 @@
#define pcibios_assign_all_busses() 0
-static inline void pcibios_set_master(struct pci_dev *dev)
-{
- /* No special bus mastering setup handling */
-}
-
static inline void pcibios_penalize_isa_irq(int irq, int active)
{
/* We don't do dynamic PCI IRQ allocation */
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 41af7fa..f93f749 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -205,12 +205,6 @@ static int pcibios_enable_resources(struct pci_dev *dev, int mask)
return 0;
}
-/*
- * If we set up a device for bus mastering, we need to check the latency
- * timer as certain crappy BIOSes forget to set it properly.
- */
-static unsigned int pcibios_max_latency = 255;
-
void pcibios_set_master(struct pci_dev *dev)
{
u8 lat;
diff --git a/arch/mn10300/unit-asb2305/pci-asb2305.c b/arch/mn10300/unit-asb2305/pci-asb2305.c
index 8e6763e..2b299c4 100644
--- a/arch/mn10300/unit-asb2305/pci-asb2305.c
+++ b/arch/mn10300/unit-asb2305/pci-asb2305.c
@@ -213,12 +213,6 @@ void __init pcibios_resource_survey(void)
pcibios_allocate_resources(1);
}
-/*
- * If we set up a device for bus mastering, we need to check the latency
- * timer as certain crappy BIOSes forget to set it properly.
- */
-unsigned int pcibios_max_latency = 255;
-
void pcibios_set_master(struct pci_dev *dev)
{
u8 lat;
diff --git a/arch/mn10300/unit-asb2305/pci-asb2305.h b/arch/mn10300/unit-asb2305/pci-asb2305.h
index c3fa294..1194fe4 100644
--- a/arch/mn10300/unit-asb2305/pci-asb2305.h
+++ b/arch/mn10300/unit-asb2305/pci-asb2305.h
@@ -31,8 +31,6 @@ extern unsigned int pci_probe;
/* pci-asb2305.c */
-extern unsigned int pcibios_max_latency;
-
extern void pcibios_resource_survey(void);
/* pci.c */
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index c2691af..cfdb2f6 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -243,12 +243,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
return pci_enable_resources(dev, mask);
}
-/*
- * If we set up a device for bus mastering, we need to check and set
- * the latency timer as it may not be properly set.
- */
-static unsigned int pcibios_max_latency = 255;
-
void pcibios_set_master(struct pci_dev *dev)
{
u8 lat;
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
index e381978..b3a5317 100644
--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -44,8 +44,6 @@ enum pci_bf_sort_state {
/* pci-i386.c */
-extern unsigned int pcibios_max_latency;
-
void pcibios_resource_survey(void);
void pcibios_set_cache_line_size(void);
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 794b092..dd5806b 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -254,12 +254,6 @@ void __init pcibios_resource_survey(void)
*/
fs_initcall(pcibios_assign_resources);
-/*
- * If we set up a device for bus mastering, we need to check the latency
- * timer as certain crappy BIOSes forget to set it properly.
- */
-unsigned int pcibios_max_latency = 255;
-
void pcibios_set_master(struct pci_dev *dev)
{
u8 lat;
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