From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:26002 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753579AbcFRCZl (ORCPT ); Fri, 17 Jun 2016 22:25:41 -0400 From: Yinghai Lu To: Bjorn Helgaas , David Miller , Benjamin Herrenschmidt , Linus Torvalds Cc: Wei Yang , Khalid Aziz , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH v13 14/16] PCI: Add has_mem64 for struct host_bridge Date: Fri, 17 Jun 2016 19:24:59 -0700 Message-Id: <20160618022501.15648-15-yinghai@kernel.org> In-Reply-To: <20160618022501.15648-1-yinghai@kernel.org> References: <20160618022501.15648-1-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 5d11dec..90091fa 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -2231,6 +2231,13 @@ 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 3f158c4..5bb8441 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -406,6 +406,7 @@ 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, -- 2.8.3