PCI: Make early dump functionality generic
Move early dump functionality into common code so that it is available for
all architectures. No need to carry arch-specific reads around as the read
hooks are already initialized by the time pci_setup_device() is getting
called during scan.
Tested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index efc7aa7..f11b948 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2995,7 +2995,7 @@
See also Documentation/blockdev/paride.txt.
pci=option[,option...] [PCI] various PCI subsystem options:
- earlydump [X86] dump PCI config space before the kernel
+ earlydump dump PCI config space before the kernel
changes anything
off [X86] don't probe for the PCI bus
bios [X86-32] force use of PCI BIOS, don't access
diff --git a/arch/x86/include/asm/pci-direct.h b/arch/x86/include/asm/pci-direct.h
index e1084f7..94597a3 100644
--- a/arch/x86/include/asm/pci-direct.h
+++ b/arch/x86/include/asm/pci-direct.h
@@ -15,8 +15,4 @@
extern void write_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset, u16 val);
extern int early_pci_allowed(void);
-
-extern unsigned int pci_early_dump_regs;
-extern void early_dump_pci_device(u8 bus, u8 slot, u8 func);
-extern void early_dump_pci_devices(void);
#endif /* _ASM_X86_PCI_DIRECT_H */
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 2f86d88..480f250 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -991,11 +991,6 @@
setup_clear_cpu_cap(X86_FEATURE_APIC);
}
-#ifdef CONFIG_PCI
- if (pci_early_dump_regs)
- early_dump_pci_devices();
-#endif
-
e820__reserve_setup_data();
e820__finish_early_params();
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 563049c..d4ec117 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -22,7 +22,6 @@
unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
PCI_PROBE_MMCONF;
-unsigned int pci_early_dump_regs;
static int pci_bf_sort;
int pci_routeirq;
int noioapicquirk;
@@ -599,9 +598,6 @@
pci_probe |= PCI_BIG_ROOT_WINDOW;
return NULL;
#endif
- } else if (!strcmp(str, "earlydump")) {
- pci_early_dump_regs = 1;
- return NULL;
} else if (!strcmp(str, "routeirq")) {
pci_routeirq = 1;
return NULL;
diff --git a/arch/x86/pci/early.c b/arch/x86/pci/early.c
index e5f753c..f5fc953 100644
--- a/arch/x86/pci/early.c
+++ b/arch/x86/pci/early.c
@@ -57,47 +57,3 @@
PCI_PROBE_CONF1;
}
-void early_dump_pci_device(u8 bus, u8 slot, u8 func)
-{
- u32 value[256 / 4];
- int i;
-
- pr_info("pci 0000:%02x:%02x.%d config space:\n", bus, slot, func);
-
- for (i = 0; i < 256; i += 4)
- value[i / 4] = read_pci_config(bus, slot, func, i);
-
- print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, value, 256, false);
-}
-
-void early_dump_pci_devices(void)
-{
- unsigned bus, slot, func;
-
- if (!early_pci_allowed())
- return;
-
- for (bus = 0; bus < 256; bus++) {
- for (slot = 0; slot < 32; slot++) {
- for (func = 0; func < 8; func++) {
- u32 class;
- u8 type;
-
- class = read_pci_config(bus, slot, func,
- PCI_CLASS_REVISION);
- if (class == 0xffffffff)
- continue;
-
- early_dump_pci_device(bus, slot, func);
-
- if (func == 0) {
- type = read_pci_config_byte(bus, slot,
- func,
- PCI_HEADER_TYPE);
- if (!(type & 0x80))
- break;
- }
- }
- }
- }
-}
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 1b20c43..e1b0bbd 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -115,6 +115,9 @@
/* If set, the PCIe ATS capability will not be used. */
static bool pcie_ats_disabled;
+/* If set, the PCI config space of each device is printed during boot. */
+bool pci_early_dump;
+
bool pci_ats_disabled(void)
{
return pcie_ats_disabled;
@@ -5833,6 +5836,8 @@
pcie_ats_disabled = true;
} else if (!strcmp(str, "noaer")) {
pci_no_aer();
+ } else if (!strcmp(str, "earlydump")) {
+ pci_early_dump = true;
} else if (!strncmp(str, "realloc=", 8)) {
pci_realloc_get_opt(str + 8);
} else if (!strncmp(str, "realloc", 7)) {
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index c358e7a0..c33265e 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -7,6 +7,7 @@
#define PCI_VSEC_ID_INTEL_TBT 0x1234 /* Thunderbolt */
extern const unsigned char pcie_link_speed[];
+extern bool pci_early_dump;
bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index ac876e3..84034a6 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1549,6 +1549,20 @@
return 0;
}
+static void early_dump_pci_device(struct pci_dev *pdev)
+{
+ u32 value[256 / 4];
+ int i;
+
+ pci_info(pdev, "config space:\n");
+
+ for (i = 0; i < 256; i += 4)
+ pci_read_config_dword(pdev, i, &value[i / 4]);
+
+ print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1,
+ value, 256, false);
+}
+
/**
* pci_setup_device - Fill in class and map information of a device
* @dev: the device structure to fill
@@ -1598,6 +1612,9 @@
pci_printk(KERN_DEBUG, dev, "[%04x:%04x] type %02x class %#08x\n",
dev->vendor, dev->device, dev->hdr_type, dev->class);
+ if (pci_early_dump)
+ early_dump_pci_device(dev);
+
/* Need to have dev->class ready */
dev->cfg_size = pci_cfg_space_size(dev);