From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:22442 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758399AbcBYDNg (ORCPT ); Wed, 24 Feb 2016 22:13:36 -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 13/59] PCI: Add has_mem64 for struct host_bridge Date: Wed, 24 Feb 2016 18:12:04 -0800 Message-Id: <1456366370-28995-14-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: Add has_mem64 for struct host_bridge, on root bus that does not support mmio64 above 4g, will not set that. We will use that info next two following patches: 1. Don't treat non-pref mmio64 as pref mmio, so will not put it under bridge's pref range when rescan the devices 2. will keep pref mmio64 and pref mmio32 under bridge pref bar. Signed-off-by: Yinghai Lu Tested-by: Khalid Aziz --- drivers/pci/probe.c | 7 +++++++ include/linux/pci.h | 1 + 2 files changed, 8 insertions(+) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 2c3e264..bcda915 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -2189,6 +2189,13 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, } else bus_addr[0] = '\0'; dev_info(&b->dev, "root bus resource %pR%s\n", res, bus_addr); + + if (resource_type(res) == IORESOURCE_MEM) { + if ((res->end - offset) > 0xffffffff) + bridge->has_mem64 = 1; + if ((res->start - offset) > 0xffffffff) + res->flags |= IORESOURCE_MEM_64; + } } down_write(&pci_bus_sem); diff --git a/include/linux/pci.h b/include/linux/pci.h index ca8d70a..d4592e3 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -413,6 +413,7 @@ struct pci_host_bridge { void (*release_fn)(struct pci_host_bridge *); void *release_data; unsigned int ignore_reset_delay:1; /* for entire hierarchy */ + unsigned int has_mem64:1; /* Resource alignment requirements */ resource_size_t (*align_resource)(struct pci_dev *dev, const struct resource *res, -- 1.8.4.5