From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:40565 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758439AbcBYCNa (ORCPT ); Wed, 24 Feb 2016 21:13:30 -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 v10 05/59] sparc/PCI: Keep resource idx order with bridge register number Date: Wed, 24 Feb 2016 18:11:56 -0800 Message-Id: <1456366370-28995-6-git-send-email-yinghai@kernel.org> In-Reply-To: <1456366370-28995-1-git-send-email-yinghai@kernel.org> References: <1456366370-28995-1-git-send-email-yinghai@kernel.org> Sender: linux-pci-owner@vger.kernel.org List-ID: On one system found strange "no compatible bridge window" warning PCI: Claiming 0000:00:01.0: Resource 14: 0002000100000000..000200010fffffff [10220c] PCI: Claiming 0000:01:00.0: Resource 1: 0002000100000000..000200010000ffff [100214] pci 0000:01:00.0: can't claim BAR 1 [mem 0x2000100000000-0x200010000ffff 64bit]: no compatible bridge window and we already had pref_compat support that add extra pref bit for device resource. It turns out that pci_resource_compatible()/pci_up_path_over_pref_mem64() just check resource with bridge pref mmio register idx 15, and we have put resource to use mmio register idx 14 during of_scan_pci_bridge() as the bridge does not mmio resource. We already fix pci_up_path_over_pref_mem64() to check all bus resources. And at the same time, this patch will make resource to have consistent sequence like other arch or directly from pci_read_bridge_bases(), even when non-pref mmio is missing, or out of ordering in firmware reporting. Just hold i = 1 for non pref mmio, and i = 2 for pref mmio. Signed-off-by: Yinghai Lu Tested-by: Khalid Aziz --- arch/sparc/kernel/pci.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c index 0e82584..36a0dfb 100644 --- a/arch/sparc/kernel/pci.c +++ b/arch/sparc/kernel/pci.c @@ -472,7 +472,7 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm, pci_read_bridge_bases(bus); goto after_ranges; } - i = 1; + i = 3; for (; len >= 32; len -= 32, ranges += 8) { u64 start; @@ -504,6 +504,12 @@ static void of_scan_pci_bridge(struct pci_pbm_info *pbm, " for bridge %s\n", node->full_name); continue; } + } else if ((flags & IORESOURCE_PREFETCH) && + !bus->resource[2]->flags) { + res = bus->resource[2]; + } else if (((flags & (IORESOURCE_MEM | IORESOURCE_PREFETCH)) == + IORESOURCE_MEM) && !bus->resource[1]->flags) { + res = bus->resource[1]; } else { if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) { printk(KERN_ERR "PCI: too many memory ranges" -- 1.8.4.5