diff options
Diffstat (limited to 'SOURCES/0001-Vulcan-AHCI-PCI-bar-fix-for-Broadcom-Vulcan-early-si.patch')
| -rw-r--r-- | SOURCES/0001-Vulcan-AHCI-PCI-bar-fix-for-Broadcom-Vulcan-early-si.patch | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/SOURCES/0001-Vulcan-AHCI-PCI-bar-fix-for-Broadcom-Vulcan-early-si.patch b/SOURCES/0001-Vulcan-AHCI-PCI-bar-fix-for-Broadcom-Vulcan-early-si.patch new file mode 100644 index 0000000..828ed5d --- /dev/null +++ b/SOURCES/0001-Vulcan-AHCI-PCI-bar-fix-for-Broadcom-Vulcan-early-si.patch @@ -0,0 +1,75 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: Robert Richter <rrichter@redhat.com> +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 <dnelson@redhat.com> +RH-Acked-by: Mark Langsdorf <mlangsdo@redhat.com> +RH-Acked-by: Mark Salter <msalter@redhat.com> + +From: Ashok Kumar Sekar <asekar@redhat.com> + +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 <asekar@redhat.com> +Signed-off-by: Jayachandran C <jchandra@broadcom.com> +Signed-off-by: Robert Richter <rrichter@redhat.com> +Signed-off-by: Herton R. Krzesinski <herton@redhat.com> +--- + 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 + |