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Subjectback port piix ide fixup to 2.4.19.
Hello all:

My hardware is "00:1f.1 IDE interface: Intel Corp. 82801CAM IDE U100 (rev 02)",

In 2.4.19 without this patch, the hdparm can get only ~5M/sec.
In 2.4.19 with this patch, the hdparm can get data up to 20M/sec.

The old code is in 2.5.34.

Please test it.
-------
--- drivers/ide/ide-pci.c Wed Aug 7 19:28:13 2002
+++ drivers/ide/ide-pci.c.old Wed Sep 11 13:42:15 2002
@@ -951,6 +951,42 @@
ide_setup_pci_device(dev2, d2);
}

+inline void ide_register_xp_fix(struct pci_dev *dev)
+{
+ int i;
+ unsigned short cmd;
+ unsigned long flags;
+ unsigned long base_address[4] = { 0x1f0, 0x3f4, 0x170, 0x374 };
+
+ local_irq_save(flags);
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+ pci_write_config_word(dev, PCI_COMMAND, cmd & ~PCI_COMMAND_IO);
+ for (i=0; i<4; i++) {
+ dev->resource[i].start = 0;
+ dev->resource[i].end = 0;
+ dev->resource[i].flags = 0;
+ }
+ for (i=0; i<4; i++) {
+ dev->resource[i].start = base_address[i];
+ dev->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
+ pci_write_config_dword(dev,
+ (PCI_BASE_ADDRESS_0 + (i * 4)),
+ dev->resource[i].start);
+ }
+ pci_write_config_word(dev, PCI_COMMAND, cmd);
+ local_irq_restore(flags);
+}
+
+void __init fixup_device_piix (struct pci_dev *dev, ide_pci_device_t *d)
+{
+ if (dev->resource[0].start != 0x01F1)
+ ide_register_xp_fix(dev);
+ printk("%s: IDE controller on PCI bus %02x dev %02x\n",
+ d->name, dev->bus->number, dev->devfn);
+ ide_setup_pci_device(dev, d);
+
+}
+
/*
* ide_scan_pcibus() gets invoked at boot time from ide.c.
* It finds all PCI IDE controllers and calls ide_setup_pci_device for them.
@@ -977,6 +1013,8 @@
hpt366_device_order_fixup(dev, d);
else if (IDE_PCI_DEVID_EQ(d->devid, DEVID_PDC20270))
pdc20270_device_order_fixup(dev, d);
+ else if (IDE_PCI_DEVID_EQ(d->devid, DEVID_ICH3M))
+ fixup_device_piix(dev, d);
else if (!IDE_PCI_DEVID_EQ(d->devid, IDE_PCI_DEVID_NULL) || (dev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
if (IDE_PCI_DEVID_EQ(d->devid, IDE_PCI_DEVID_NULL))
printk("%s: unknown IDE controller on PCI bus %02x device %02x, VID=%04x, DID=%04x\n",
--
--- Hu Gang
-
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