76 lines
2.6 KiB
Diff
76 lines
2.6 KiB
Diff
From 95073ff591ddf911c18609f01c1f048be2a042a5 Mon Sep 17 00:00:00 2001
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From: Robert Richter <rrichter@redhat.com>
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Date: Thu, 7 Jun 2018 22:59:32 -0400
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Subject: [PATCH] Vulcan: AHCI PCI bar fix for Broadcom Vulcan early silicon
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Message-id: <1528412373-19128-2-git-send-email-rrichter@redhat.com>
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Patchwork-id: 220950
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O-Subject: [RHEL-8.0 BZ 1563590 v2 1/2] PCI: Vulcan: AHCI PCI bar fix for Broadcom Vulcan early silicon
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Bugzilla: 1563590
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RH-Acked-by: Dean Nelson <dnelson@redhat.com>
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RH-Acked-by: Mark Langsdorf <mlangsdo@redhat.com>
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RH-Acked-by: Mark Salter <msalter@redhat.com>
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From: Ashok Kumar Sekar <asekar@redhat.com>
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PCI BAR 5 is not setup correctly for the on-board AHCI
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controller on Broadcom's Vulcan processor. Added a quirk to fix BAR 5
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by using BAR 4's resources which are populated correctly but NOT used
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by the AHCI controller actually.
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RHEL-only:
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Both patches are in RHEL-7.6 also. Inclusion of the patches into RHEL-8
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was discussed. Since there are partners with Ax system configurations it
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was decided to carry them in RHEL8 too. See:
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https://bugzilla.redhat.com/show_bug.cgi?id=1563590#c1
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Upstream Status: RHEL only
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Signed-off-by: Ashok Kumar Sekar <asekar@redhat.com>
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Signed-off-by: Jayachandran C <jchandra@broadcom.com>
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Signed-off-by: Robert Richter <rrichter@redhat.com>
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Signed-off-by: Herton R. Krzesinski <herton@redhat.com>
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---
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drivers/pci/quirks.c | 24 ++++++++++++++++++++++++
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1 file changed, 24 insertions(+)
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diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
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index ca9ed5774eb1..bd0cee4236b0 100644
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--- a/drivers/pci/quirks.c
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+++ b/drivers/pci/quirks.c
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@@ -4183,6 +4183,30 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9000,
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9084,
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quirk_bridge_cavm_thrx2_pcie_root);
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+/*
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+ * PCI BAR 5 is not setup correctly for the on-board AHCI controller
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+ * on Broadcom's Vulcan processor. Added a quirk to fix BAR 5 by
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+ * using BAR 4's resources which are populated correctly and NOT
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+ * actually used by the AHCI controller.
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+ */
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+static void quirk_fix_vulcan_ahci_bars(struct pci_dev *dev)
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+{
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+ struct resource *r = &dev->resource[4];
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+
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+ if (!(r->flags & IORESOURCE_MEM) || (r->start == 0))
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+ return;
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+
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+ /* Set BAR5 resource to BAR4 */
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+ dev->resource[5] = *r;
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+
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+ /* Update BAR5 in pci config space */
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+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_5, r->start);
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+
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+ /* Clear BAR4's resource */
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+ memset(r, 0, sizeof(*r));
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+}
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+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9027, quirk_fix_vulcan_ahci_bars);
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+
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/*
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* Intersil/Techwell TW686[4589]-based video capture cards have an empty (zero)
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* class code. Fix it.
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--
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2.26.2
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