From ac17ad216c268c2deede9846517283d0704ed888 Mon Sep 17 00:00:00 2001 From: Robert Richter Date: Thu, 7 Jun 2018 22:59:32 -0400 Subject: [PATCH] Vulcan: AHCI PCI bar fix for Broadcom Vulcan early silicon Message-id: <1528412373-19128-2-git-send-email-rrichter@redhat.com> Patchwork-id: 220950 O-Subject: [RHEL-8.0 BZ 1563590 v2 1/2] PCI: Vulcan: AHCI PCI bar fix for Broadcom Vulcan early silicon Bugzilla: 1563590 RH-Acked-by: Dean Nelson RH-Acked-by: Mark Langsdorf RH-Acked-by: Mark Salter From: Ashok Kumar Sekar PCI BAR 5 is not setup correctly for the on-board AHCI controller on Broadcom's Vulcan processor. Added a quirk to fix BAR 5 by using BAR 4's resources which are populated correctly but NOT used by the AHCI controller actually. RHEL-only: Both patches are in RHEL-7.6 also. Inclusion of the patches into RHEL-8 was discussed. Since there are partners with Ax system configurations it was decided to carry them in RHEL8 too. See: https://bugzilla.redhat.com/show_bug.cgi?id=1563590#c1 Upstream Status: RHEL only Signed-off-by: Ashok Kumar Sekar Signed-off-by: Jayachandran C Signed-off-by: Robert Richter Signed-off-by: Herton R. Krzesinski --- drivers/pci/quirks.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index ca9ed5774eb1..bd0cee4236b0 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4183,6 +4183,30 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9000, DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9084, quirk_bridge_cavm_thrx2_pcie_root); +/* + * PCI BAR 5 is not setup correctly for the on-board AHCI controller + * on Broadcom's Vulcan processor. Added a quirk to fix BAR 5 by + * using BAR 4's resources which are populated correctly and NOT + * actually used by the AHCI controller. + */ +static void quirk_fix_vulcan_ahci_bars(struct pci_dev *dev) +{ + struct resource *r = &dev->resource[4]; + + if (!(r->flags & IORESOURCE_MEM) || (r->start == 0)) + return; + + /* Set BAR5 resource to BAR4 */ + dev->resource[5] = *r; + + /* Update BAR5 in pci config space */ + pci_write_config_dword(dev, PCI_BASE_ADDRESS_5, r->start); + + /* Clear BAR4's resource */ + memset(r, 0, sizeof(*r)); +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9027, quirk_fix_vulcan_ahci_bars); + /* * Intersil/Techwell TW686[4589]-based video capture cards have an empty (zero) * class code. Fix it. -- 2.26.2