Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[firefly-linux-kernel-4.4.55.git] / arch / x86 / pci / early.c

diff --git a/arch/x86/pci/early.c b/arch/x86/pci/early.c
index 42df4b6606dfdbc6f21d2cce0cbb6e8ae3e3ea42..858dbe3399f9f79d5b318bef2767ffcb37153960 100644 (file)
--- a/arch/x86/pci/early.c
+++ b/arch/x86/pci/early.c
@@ -49,7 +49,14 @@ void write_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset, u8 val)
 {
        PDprintk("%x writing to %x: %x\n", slot, offset, val);
        outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
-       outb(val, 0xcfc);
+       outb(val, 0xcfc + (offset&3));
+}
+
+void write_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset, u16 val)
+{
+       PDprintk("%x writing to %x: %x\n", slot, offset, val);
+       outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
+       outw(val, 0xcfc + (offset&2));
 }
 
 int early_pci_allowed(void)
@@ -57,3 +64,54 @@ int early_pci_allowed(void)
        return (pci_probe & (PCI_PROBE_CONF1|PCI_PROBE_NOEARLY)) ==
                        PCI_PROBE_CONF1;
 }
+
+void early_dump_pci_device(u8 bus, u8 slot, u8 func)
+{
+       int i;
+       int j;
+       u32 val;
+
+       printk("PCI: %02x:%02x:%02x", bus, slot, func);
+
+       for (i = 0; i < 256; i += 4) {
+               if (!(i & 0x0f))
+                       printk("\n%04x:",i);
+
+               val = read_pci_config(bus, slot, func, i);
+               for (j = 0; j < 4; j++) {
+                       printk(" %02x", val & 0xff);
+                       val >>= 8;
+               }
+       }
+       printk("\n");
+}
+
+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)
+                                       break;
+
+                               early_dump_pci_device(bus, slot, func);
+
+                               /* No multi-function device? */
+                               type = read_pci_config_byte(bus, slot, func,
+                                                              PCI_HEADER_TYPE);
+                               if (!(type & 0x80))
+                                       break;
+                       }
+               }
+       }
+}
+