Commit b7ae128d authored Jun 05, 2015 by Robert Richter Committed by Tejun Heo Jun 16, 2015

ahci: Add support for Cavium's ThunderX host controller



This patch adds support for Cavium's ThunderX host controller. The
controller resides on the SoC and is a AHCI compatible SATA controller
with one port, compliant with Serial ATA 3.1 and AHCI Revision 1.31.
There can exists multiple SATA controllers on the SoC.

The controller depends on MSI-X support since the PCI ECAM controller
on the SoC does not implement MSI nor lagacy intx interrupt support.
Thus, during device initialization, if MSI fails MSI-X will be used to
enable the device's interrupts.

The controller uses non-standard BAR0 for its register range. The
already existing device lookup (vendor and device id) that is already
implemented for other host controllers is used to change the PCI BAR.

Signed-off-by: Robert Richter <rrichter@cavium.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

parent ee2aad42

drivers/ata/ahci.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -53,6 +53,7 @@

		enum {
		AHCI_PCI_BAR_STA2X11 = 0,
		AHCI_PCI_BAR_CAVIUM = 0,
		AHCI_PCI_BAR_ENMOTUS = 2,
		AHCI_PCI_BAR_STANDARD = 5,
		};
		@@ -1374,11 +1375,13 @@ static int ahci_init_one(struct pci_dev pdev, const struct pci_device_id ent)
		dev_info(&pdev->dev,
		"PDC42819 can only drive SATA devices with this driver\n");

		/* Both Connext and Enmotus devices use non-standard BARs */
		/* Some devices use non-standard BARs */
		if (pdev->vendor == PCI_VENDOR_ID_STMICRO && pdev->device == 0xCC06)
		ahci_pci_bar = AHCI_PCI_BAR_STA2X11;
		else if (pdev->vendor == 0x1c44 && pdev->device == 0x8000)
		ahci_pci_bar = AHCI_PCI_BAR_ENMOTUS;
		else if (pdev->vendor == 0x177d && pdev->device == 0xa01c)
		ahci_pci_bar = AHCI_PCI_BAR_CAVIUM;

		/*
		* The JMicron chip 361/363 contains one SATA controller and one

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