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Date: Thu, 28 Feb 2008 23:56:50 -0800
From: Yinghai Lu <Yinghai.Lu@....COM>
To: Ingo Molnar <mingo@...e.hu>
Cc: Greg KH <greg@...ah.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86 pci: remove checking type for mmconfig probe v2
doesn't need to check if it is type1 or type2. we can use raw_pci_ops dirctly.
also make pci_direct_conf1 static again.
anyway is there system with type 2 and mmconf support?
Signed-off-by: Yinghai Lu <yinghai.lu@....com>
Index: linux-2.6/arch/x86/pci/direct.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/direct.c
+++ linux-2.6/arch/x86/pci/direct.c
@@ -76,7 +76,7 @@ static int pci_conf1_write(unsigned int
#undef PCI_CONF1_ADDRESS
-struct pci_raw_ops pci_direct_conf1 = {
+static struct pci_raw_ops pci_direct_conf1 = {
.read = pci_conf1_read,
.write = pci_conf1_write,
};
@@ -258,7 +258,8 @@ void __init pci_direct_init(int type)
{
if (type == 0)
return;
- printk(KERN_INFO "PCI: Using configuration type %d\n", type);
+ printk(KERN_INFO "PCI: Using configuration type %d for base access\n",
+ type);
if (type == 1)
raw_pci_ops = &pci_direct_conf1;
else
@@ -275,8 +276,10 @@ int __init pci_direct_probe(void)
if (!region)
goto type2;
- if (pci_check_type1())
+ if (pci_check_type1()) {
+ raw_pci_ops = &pci_direct_conf1;
return 1;
+ }
release_resource(region);
type2:
@@ -290,7 +293,6 @@ int __init pci_direct_probe(void)
goto fail2;
if (pci_check_type2()) {
- printk(KERN_INFO "PCI: Using configuration type 2\n");
raw_pci_ops = &pci_direct_conf2;
return 2;
}
Index: linux-2.6/arch/x86/pci/init.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/init.c
+++ linux-2.6/arch/x86/pci/init.c
@@ -6,14 +6,13 @@
in the right sequence from here. */
static __init int pci_access_init(void)
{
- int type __maybe_unused = 0;
-
#ifdef CONFIG_PCI_DIRECT
+ int type = 0;
+
type = pci_direct_probe();
#endif
- pci_mmcfg_early_init(type);
- if (raw_pci_ops)
- return 0;
+ pci_mmcfg_early_init();
+
#ifdef CONFIG_PCI_BIOS
pci_pcbios_init();
#endif
@@ -26,7 +25,7 @@ static __init int pci_access_init(void)
#ifdef CONFIG_PCI_DIRECT
pci_direct_init(type);
#endif
- if (!raw_pci_ops)
+ if (!raw_pci_ops && !raw_pci_ext_ops)
printk(KERN_ERR
"PCI: Fatal: No config space access function found\n");
Index: linux-2.6/arch/x86/pci/mmconfig-shared.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/mmconfig-shared.c
+++ linux-2.6/arch/x86/pci/mmconfig-shared.c
@@ -28,7 +28,7 @@ static int __initdata pci_mmcfg_resource
static const char __init *pci_mmcfg_e7520(void)
{
u32 win;
- pci_direct_conf1.read(0, 0, PCI_DEVFN(0,0), 0xce, 2, &win);
+ raw_pci_ops->read(0, 0, PCI_DEVFN(0, 0), 0xce, 2, &win);
win = win & 0xf000;
if(win == 0x0000 || win == 0xf000)
@@ -53,7 +53,7 @@ static const char __init *pci_mmcfg_inte
pci_mmcfg_config_num = 1;
- pci_direct_conf1.read(0, 0, PCI_DEVFN(0,0), 0x48, 4, &pciexbar);
+ raw_pci_ops->read(0, 0, PCI_DEVFN(0, 0), 0x48, 4, &pciexbar);
/* Enable bit */
if (!(pciexbar & 1))
@@ -179,6 +179,9 @@ static int __init pci_mmcfg_check_hostbr
int i;
const char *name;
+ if (!raw_pci_ops)
+ return 0;
+
pci_mmcfg_config_num = 0;
pci_mmcfg_config = NULL;
name = NULL;
@@ -186,7 +189,7 @@ static int __init pci_mmcfg_check_hostbr
for (i = 0; !name && i < ARRAY_SIZE(pci_mmcfg_probes); i++) {
bus = pci_mmcfg_probes[i].bus;
devfn = pci_mmcfg_probes[i].devfn;
- pci_direct_conf1.read(0, bus, devfn, 0, 4, &l);
+ raw_pci_ops->read(0, bus, devfn, 0, 4, &l);
vendor = l & 0xffff;
device = (l >> 16) & 0xffff;
@@ -304,7 +307,7 @@ static int __init is_acpi_reserved(unsig
return mcfg_res.flags;
}
-static void __init pci_mmcfg_reject_broken(int type, int early)
+static void __init pci_mmcfg_reject_broken(int early)
{
typeof(pci_mmcfg_config[0]) *cfg;
int i;
@@ -342,8 +345,8 @@ static void __init pci_mmcfg_reject_brok
" reserved in ACPI motherboard resources\n",
cfg->address);
/* Don't try to do this check unless configuration
- type 1 is available. */
- if (type == 1 && e820_all_mapped(cfg->address,
+ type 1 is available. how about type 2 ?*/
+ if (raw_pci_ops && e820_all_mapped(cfg->address,
cfg->address + size - 1,
E820_RESERVED)) {
printk(KERN_NOTICE
@@ -368,7 +371,7 @@ reject:
static int __initdata known_bridge;
-void __init __pci_mmcfg_init(int type, int early)
+void __init __pci_mmcfg_init(int early)
{
/* MMCONFIG disabled */
if ((pci_probe & PCI_PROBE_MMCONF) == 0)
@@ -382,7 +385,7 @@ void __init __pci_mmcfg_init(int type, i
if (known_bridge)
return;
- if (early && type == 1) {
+ if (early) {
if (pci_mmcfg_check_hostbridge())
known_bridge = 1;
#if 0
@@ -394,7 +397,7 @@ void __init __pci_mmcfg_init(int type, i
if (!known_bridge) {
acpi_table_parse(ACPI_SIG_MCFG, acpi_parse_mcfg);
- pci_mmcfg_reject_broken(type, early);
+ pci_mmcfg_reject_broken(early);
}
if ((pci_mmcfg_config_num == 0) ||
@@ -415,19 +418,14 @@ void __init __pci_mmcfg_init(int type, i
}
}
-void __init pci_mmcfg_early_init(int type)
+void __init pci_mmcfg_early_init(void)
{
- __pci_mmcfg_init(type, 1);
+ __pci_mmcfg_init(1);
}
void __init pci_mmcfg_late_init(void)
{
- int type = 0;
-
- if (pci_probe & PCI_PROBE_CONF1)
- type = 1;
-
- __pci_mmcfg_init(type, 0);
+ __pci_mmcfg_init(0);
}
static int __init pci_mmcfg_late_insert_resources(void)
Index: linux-2.6/arch/x86/pci/pci.h
===================================================================
--- linux-2.6.orig/arch/x86/pci/pci.h
+++ linux-2.6/arch/x86/pci/pci.h
@@ -95,8 +95,6 @@ struct pci_raw_ops {
extern struct pci_raw_ops *raw_pci_ops;
extern struct pci_raw_ops *raw_pci_ext_ops;
-extern struct pci_raw_ops pci_direct_conf1;
-
extern int pci_direct_probe(void);
extern void pci_direct_init(int type);
extern void pci_pcbios_init(void);
Index: linux-2.6/include/linux/pci.h
===================================================================
--- linux-2.6.orig/include/linux/pci.h
+++ linux-2.6/include/linux/pci.h
@@ -1052,10 +1052,10 @@ extern unsigned long pci_cardbus_mem_siz
extern int pcibios_add_platform_entries(struct pci_dev *dev);
#ifdef CONFIG_PCI_MMCONFIG
-extern void __init pci_mmcfg_early_init(int type);
+extern void __init pci_mmcfg_early_init(void);
extern void __init pci_mmcfg_late_init(void);
#else
-static inline void pci_mmcfg_early_init(int type) { }
+static inline void pci_mmcfg_early_init(void) { }
static inline void pci_mmcfg_late_init(void) { }
#endif
--
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