From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/ide/rz1000.c | 99 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 kernel/drivers/ide/rz1000.c (limited to 'kernel/drivers/ide/rz1000.c') diff --git a/kernel/drivers/ide/rz1000.c b/kernel/drivers/ide/rz1000.c new file mode 100644 index 000000000..f4b66f7ec --- /dev/null +++ b/kernel/drivers/ide/rz1000.c @@ -0,0 +1,99 @@ +/* + * Copyright (C) 1995-1998 Linus Torvalds & author (see below) + */ + +/* + * Principal Author: mlord@pobox.com (Mark Lord) + * + * See linux/MAINTAINERS for address of current maintainer. + * + * This file provides support for disabling the buggy read-ahead + * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards. + * + * Dunno if this fixes both ports, or only the primary port (?). + */ + +#include +#include +#include +#include +#include +#include + +#define DRV_NAME "rz1000" + +static int rz1000_disable_readahead(struct pci_dev *dev) +{ + u16 reg; + + if (!pci_read_config_word (dev, 0x40, ®) && + !pci_write_config_word(dev, 0x40, reg & 0xdfff)) { + printk(KERN_INFO "%s: disabled chipset read-ahead " + "(buggy RZ1000/RZ1001)\n", pci_name(dev)); + return 0; + } else { + printk(KERN_INFO "%s: serialized, disabled unmasking " + "(buggy RZ1000/RZ1001)\n", pci_name(dev)); + return 1; + } +} + +static const struct ide_port_info rz1000_chipset = { + .name = DRV_NAME, + .host_flags = IDE_HFLAG_NO_DMA, +}; + +static int rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + struct ide_port_info d = rz1000_chipset; + int rc; + + rc = pci_enable_device(dev); + if (rc) + return rc; + + if (rz1000_disable_readahead(dev)) { + d.host_flags |= IDE_HFLAG_SERIALIZE; + d.host_flags |= IDE_HFLAG_NO_UNMASK_IRQS; + } + + return ide_pci_init_one(dev, &d, NULL); +} + +static void rz1000_remove(struct pci_dev *dev) +{ + ide_pci_remove(dev); + pci_disable_device(dev); +} + +static const struct pci_device_id rz1000_pci_tbl[] = { + { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 }, + { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl); + +static struct pci_driver rz1000_pci_driver = { + .name = "RZ1000_IDE", + .id_table = rz1000_pci_tbl, + .probe = rz1000_init_one, + .remove = rz1000_remove, +}; + +static int __init rz1000_ide_init(void) +{ + return ide_pci_register_driver(&rz1000_pci_driver); +} + +static void __exit rz1000_ide_exit(void) +{ + pci_unregister_driver(&rz1000_pci_driver); +} + +module_init(rz1000_ide_init); +module_exit(rz1000_ide_exit); + +MODULE_AUTHOR("Andre Hedrick"); +MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE"); +MODULE_LICENSE("GPL"); + -- cgit 1.2.3-korg