Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754181AbbLKFVx (ORCPT ); Fri, 11 Dec 2015 00:21:53 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:47221 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754040AbbLKFJj (ORCPT ); Fri, 11 Dec 2015 00:09:39 -0500 From: Yinghai Lu To: Bjorn Helgaas , David Miller , Benjamin Herrenschmidt , Wei Yang , TJ , Yijing Wang , Khalid Aziz Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH v9 07/60] PCI: Ignore BAR for ALi M1533 PCI-ISA bridge Date: Thu, 10 Dec 2015 21:06:03 -0800 Message-Id: <1449810416-2950-8-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.4.5 In-Reply-To: <1449810416-2950-1-git-send-email-yinghai@kernel.org> References: <1449810416-2950-1-git-send-email-yinghai@kernel.org> X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3811 Lines: 73 Meelis reported strange conflicts on sparc v210: pci 0001:00:07.0: can't claim BAR 2 [mem 0x7ff00000000-0x7ff000fffff]: address conflict with 0001:00:07.0 [mem 0x7ff00000000-0x7ff000fffff] pci 0001:00:06.0: can't claim BAR 0 [io 0x7fe01000000-0x7fe0100000f]: address conflict with 0001:00:07.0 [io 0x7fe01000000-0x7fe0100ffff] pci 0001:00:0d.0: can't claim BAR 0 [io 0x7fe01000900-0x7fe01000907]: address conflict with 0001:00:07.0 [io 0x7fe01000000-0x7fe0100ffff] pci 0001:00:0d.0: can't claim BAR 1 [io 0x7fe01000918-0x7fe0100091f]: address conflict with 0001:00:07.0 [io 0x7fe01000000-0x7fe0100ffff] pci 0001:00:0d.0: can't claim BAR 2 [io 0x7fe01000910-0x7fe01000917]: address conflict with 0001:00:07.0 [io 0x7fe01000000-0x7fe0100ffff] pci 0001:00:0d.0: can't claim BAR 3 [io 0x7fe01000908-0x7fe0100090f]: address conflict with 0001:00:07.0 [io 0x7fe01000000-0x7fe0100ffff] pci 0001:00:0d.0: can't claim BAR 4 [io 0x7fe01000920-0x7fe0100092f]: address conflict with 0001:00:07.0 [io 0x7fe01000000-0x7fe0100ffff] PCI: /pci@1e,600000 can't claim Video RAM area [mem 0x7ff000a0000-0x7ff000bffff]: address conflict with 0001:00:07.0 [mem 0x7ff00000000-0x7ff000fffff] PCI: /pci@1e,600000 can't claim System ROM [mem 0x7ff000f0000-0x7ff000fffff]: address conflict with 0001:00:07.0 [mem 0x7ff00000000-0x7ff000fffff] PCI: /pci@1e,600000 can't claim Video ROM [mem 0x7ff000c0000-0x7ff000c7fff]: address conflict with 0001:00:07.0 [mem 0x7ff00000000-0x7ff000fffff] we have pci_bus 0001:00: root bus resource [io 0x7fe01000000-0x7fe01ffffff] (bus address [0x0000-0xffffff]) pci_bus 0001:00: root bus resource [mem 0x7ff00000000-0x7ffffffffff] (bus address [0x00000000-0xffffffff]) so pci bus address in the bars for 0001:00:07.0 has all 0s. 0001:00:07.0 ISA bridge: ULi Electronics Inc. M1533/M1535/M1543 PCI to ISA Bridge [Aladdin IV/V/V+] Region 0: [virtual] I/O ports at 0000 [size=64K] Region 1: Memory at (32-bit, non-prefetchable) [size=1M] Region 2: Memory at (32-bit, non-prefetchable) [size=1M] 00: b9 10 33 15 0f 00 10 02 00 00 01 06 00 00 00 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 a0 00 00 00 00 00 00 00 00 00 00 00 According to http://www.versalogic.com/Support/Downloads/pdf/ali1543.pdf page 28: The indices before 40h are read-only. and we have all 0 from 0x10-0x2f, according to lspci. So those BAR do not work as regular BAR, just clean flags, and ignore them all the way include claim and sizing and alloc etc. Reported-by: Meelis Roos Signed-off-by: Yinghai Lu --- drivers/pci/quirks.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 7354127..3618c06 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -433,6 +433,21 @@ static void quirk_amd_nl_class(struct pci_dev *pdev) DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB, quirk_amd_nl_class); + +/* + * ALi m1533 pci to isa bridge does not have BAR according to datasheet, + * clear the flags, so we will try to claim them or reallocate res. + */ +static void quirk_ali1533(struct pci_dev *dev) +{ + int i; + + for (i = 0; i < PCI_ROM_RESOURCE; i++) + dev->resource[i].flags = 0; +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, + quirk_ali1533); + static void piix4_io_quirk(struct pci_dev *dev, const char *name, unsigned int port, unsigned int enable) { u32 devres; -- 1.8.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/