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authorJeff Garzik <jeff@garzik.org>2007-03-09 10:54:42 -0500
committerJeff Garzik <jeff@garzik.org>2007-04-28 14:15:59 -0400
commit8cdfb29c0cd8018f92214c11c631d8926f4cb032 (patch)
treed4a74d25c301e4c045ca21c45dbcbeadde234548 /drivers/pci/quirks.c
parente424675f152572d8d2365e351b90bfd81686a150 (diff)
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libata/IDE: remove combined mode quirk
Both old-IDE and libata should be able handle all controllers and devices found using normal resource reservation methods. This eliminates the awful, low-performing split-driver configuration where old-IDE drove the PATA portion of a PCI device, in PIO-only mode, and libata drove the SATA portion of the /same/ PCI device, in DMA mode. Typically vendors would ship SATA hard drive / PATA optical configuration, which would lend itself to slow (PIO-only) CD-ROM performance. For Intel users running in combined mode, it is now wholly dependent on your driver choice (potentially link order, if you compile both drivers in) whether old-IDE or libata will drive your hardware. In either case, you will get full performance from both SATA and PATA ports now, without having to pass a kernel command line parameter. Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c113
1 files changed, 0 insertions, 113 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 65d6f23..3411483 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1303,119 +1303,6 @@ static void __init quirk_alder_ioapic(struct pci_dev *pdev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EESSC, quirk_alder_ioapic );
#endif
-enum ide_combined_type { COMBINED = 0, IDE = 1, LIBATA = 2 };
-/* Defaults to combined */
-static enum ide_combined_type combined_mode;
-
-static int __init combined_setup(char *str)
-{
- if (!strncmp(str, "ide", 3))
- combined_mode = IDE;
- else if (!strncmp(str, "libata", 6))
- combined_mode = LIBATA;
- else /* "combined" or anything else defaults to old behavior */
- combined_mode = COMBINED;
-
- return 1;
-}
-__setup("combined_mode=", combined_setup);
-
-#ifdef CONFIG_SATA_INTEL_COMBINED
-static void __devinit quirk_intel_ide_combined(struct pci_dev *pdev)
-{
- u8 prog, comb, tmp;
- int ich = 0;
-
- /*
- * Narrow down to Intel SATA PCI devices.
- */
- switch (pdev->device) {
- /* PCI ids taken from drivers/scsi/ata_piix.c */
- case 0x24d1:
- case 0x24df:
- case 0x25a3:
- case 0x25b0:
- ich = 5;
- break;
- case 0x2651:
- case 0x2652:
- case 0x2653:
- case 0x2680: /* ESB2 */
- ich = 6;
- break;
- case 0x27c0:
- case 0x27c4:
- ich = 7;
- break;
- case 0x2828: /* ICH8M */
- ich = 8;
- break;
- default:
- /* we do not handle this PCI device */
- return;
- }
-
- /*
- * Read combined mode register.
- */
- pci_read_config_byte(pdev, 0x90, &tmp); /* combined mode reg */
-
- if (ich == 5) {
- tmp &= 0x6; /* interesting bits 2:1, PATA primary/secondary */
- if (tmp == 0x4) /* bits 10x */
- comb = (1 << 0); /* SATA port 0, PATA port 1 */
- else if (tmp == 0x6) /* bits 11x */
- comb = (1 << 2); /* PATA port 0, SATA port 1 */
- else
- return; /* not in combined mode */
- } else {
- WARN_ON((ich != 6) && (ich != 7) && (ich != 8));
- tmp &= 0x3; /* interesting bits 1:0 */
- if (tmp & (1 << 0))
- comb = (1 << 2); /* PATA port 0, SATA port 1 */
- else if (tmp & (1 << 1))
- comb = (1 << 0); /* SATA port 0, PATA port 1 */
- else
- return; /* not in combined mode */
- }
-
- /*
- * Read programming interface register.
- * (Tells us if it's legacy or native mode)
- */
- pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
-
- /* if SATA port is in native mode, we're ok. */
- if (prog & comb)
- return;
-
- /* Don't reserve any so the IDE driver can get them (but only if
- * combined_mode=ide).
- */
- if (combined_mode == IDE)
- return;
-
- /* Grab them both for libata if combined_mode=libata. */
- if (combined_mode == LIBATA) {
- request_region(0x1f0, 8, "libata"); /* port 0 */
- request_region(0x170, 8, "libata"); /* port 1 */
- return;
- }
-
- /* SATA port is in legacy mode. Reserve port so that
- * IDE driver does not attempt to use it. If request_region
- * fails, it will be obvious at boot time, so we don't bother
- * checking return values.
- */
- if (comb == (1 << 0))
- request_region(0x1f0, 8, "libata"); /* port 0 */
- else
- request_region(0x170, 8, "libata"); /* port 1 */
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, quirk_intel_ide_combined );
-#endif /* CONFIG_SATA_INTEL_COMBINED */
-
-
int pcie_mch_quirk;
EXPORT_SYMBOL(pcie_mch_quirk);
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