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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>
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>
This commit is contained in:
Robert Richter 2018-06-07 22:59:32 -04:00 • committed by Liu Yang
parent cb51816516
commit 0879b07039
1 changed files with 24 additions and 0 deletions
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24
drivers/pci/quirks.c
View file

@ -4139,6 +4139,30 @@ 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.