Messages in this thread Patch in this message | | | Date | Sat, 20 Sep 2008 14:35:48 -0700 | From | "Yinghai Lu" <> | Subject | Re: irq 19: nobody cared |
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On Fri, Sep 19, 2008 at 3:32 PM, Chris Li <lkml@chrisli.org> wrote: > On Fri, Sep 19, 2008 at 2:57 PM, Yinghai Lu <yhlu.kernel@gmail.com> wrote: >> >> 0x1a.2 >> 0x1d.1 >> 0x1f.2 >> 0x1f.5 >> >> are sharing pin 0x19... >> >> but early dump can not find 0x1a.2, 0x1f.2, 0x1f.5 > > But later kernel does able to find those devices. Do you mean > there is a bug in the early PCI scanning? >
please apply attached patch and boot with pci=dump
YH From 14f8de9b3985f1b58f99dee3e32b4969af8c6693 Mon Sep 17 00:00:00 2001 From: Yinghai Lu <yhlu.kernel@gmail.com> Date: Sat, 20 Sep 2008 13:51:01 -0700 Subject: [PATCH 06/25] pci: dump pci config space before loading driver
try to figure out why get extra irq that confusing the drivers.
and sometime pci=earlydump doesn't dump some device, because late quirks unhide some pci devices...
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> --- drivers/pci/pci.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 44 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index a9301a2..9ed0187 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -27,6 +27,8 @@ unsigned int pci_pm_d3_delay = 10; int pci_domains_supported = 1; #endif +static int pci_dump_regs = 0; + #define DEFAULT_CARDBUS_IO_SIZE (256) #define DEFAULT_CARDBUS_MEM_SIZE (64*1024*1024) /* pci=cbmemsize=nnM,cbiosize=nn can override this */ @@ -1871,6 +1873,43 @@ static void __devinit pci_no_domains(void) #endif } +static void __devinit pci_dump(void) +{ + pci_dump_regs = 1; +} + +static void dump_pci_device_range(struct pci_dev *dev, unsigned start_reg, unsigned size) +{ + int i; + int j; + u32 val; + int end = start_reg + size; + + printk("PCI: %s", pci_name(dev)); + + for (i = start_reg; i < end; i += 4) { + if (!(i & 0x0f)) + printk("\n%04x:",i); + + pci_read_config_dword(dev, i, &val); + for (j = 0; j < 4; j++) { + printk(" %02x", val & 0xff); + val >>= 8; + } + } + printk("\n"); +} + +static int dump_pci_devices(void) +{ + struct pci_dev *dev = NULL; + + while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { + dump_pci_device_range(dev, 0, dev->cfg_size); + } + return 0; +} + static int __devinit pci_init(void) { struct pci_dev *dev = NULL; @@ -1878,6 +1917,9 @@ static int __devinit pci_init(void) while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { pci_fixup_device(pci_fixup_final, dev); } + + if (pci_dump_regs) + dump_pci_devices(); return 0; } @@ -1894,6 +1936,8 @@ static int __devinit pci_setup(char *str) pci_no_aer(); } else if (!strcmp(str, "nodomains")) { pci_no_domains(); + } else if (!strcmp(str, "dump")) { + pci_dump(); } else if (!strncmp(str, "cbiosize=", 9)) { pci_cardbus_io_size = memparse(str + 9, &str); } else if (!strncmp(str, "cbmemsize=", 10)) { -- 1.5.6
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