From patchwork Sat Mar 14 19:47:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Kokshaysky X-Patchwork-Id: 11438669 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E3AFC6CA for ; Sun, 15 Mar 2020 02:59:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CE61920650 for ; Sun, 15 Mar 2020 02:59:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727041AbgCOC7o (ORCPT ); Sat, 14 Mar 2020 22:59:44 -0400 Received: from mail.rc.ru ([151.236.222.147]:48106 "EHLO mail.rc.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726553AbgCOC7o (ORCPT ); Sat, 14 Mar 2020 22:59:44 -0400 Received: from mail.rc.ru ([2a01:7e00:e000:1bf::1]:37146) by mail.rc.ru with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jDCl8-0003IR-VP; Sat, 14 Mar 2020 19:47:46 +0000 Date: Sat, 14 Mar 2020 19:47:45 +0000 From: Ivan Kokshaysky To: Matt Turner Cc: Bjorn Helgaas , Yinghai Lu , linux-pci@vger.kernel.org, linux-alpha , Richard Henderson , Jay Estabrook , Nicholas Johnson , Benjamin Herrenschmidt Subject: [PATCH] alpha: fix nautilus PCI setup Message-ID: <20200314194745.GB12510@mail.rc.ru> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Example (hopefully reasonable) of the new "size_windows" flag usage. Fixes accidental breakage caused by commit f75b99d5a77d (PCI: Enforce bus address limits in resource allocation), Signed-off-by: Ivan Kokshaysky Tested-by: Matt Turner --- arch/alpha/kernel/sys_nautilus.c | 51 ++++++++++++++++------------------------ 1 file changed, 20 insertions(+), 31 deletions(-) diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c index cd9a112d67ff..1a1e49f58e66 100644 --- a/arch/alpha/kernel/sys_nautilus.c +++ b/arch/alpha/kernel/sys_nautilus.c @@ -187,10 +187,6 @@ nautilus_machine_check(unsigned long vector, unsigned long la_ptr) extern void pcibios_claim_one_bus(struct pci_bus *); -static struct resource irongate_io = { - .name = "Irongate PCI IO", - .flags = IORESOURCE_IO, -}; static struct resource irongate_mem = { .name = "Irongate PCI MEM", .flags = IORESOURCE_MEM, @@ -211,14 +207,17 @@ nautilus_init_pci(void) struct pci_dev *irongate; unsigned long bus_align, bus_size, pci_mem; unsigned long memtop = max_low_pfn << PAGE_SHIFT; - int ret; bridge = pci_alloc_host_bridge(0); if (!bridge) return; + /* Use default IO. */ pci_add_resource(&bridge->windows, &ioport_resource); - pci_add_resource(&bridge->windows, &iomem_resource); + /* Irongate PCI memory aperture, calculate requred size before + setting it up. */ + pci_add_resource(&bridge->windows, &irongate_mem); + pci_add_resource(&bridge->windows, &busn_resource); bridge->dev.parent = NULL; bridge->sysdata = hose; @@ -226,59 +225,49 @@ nautilus_init_pci(void) bridge->ops = alpha_mv.pci_ops; bridge->swizzle_irq = alpha_mv.pci_swizzle; bridge->map_irq = alpha_mv.pci_map_irq; + bridge->size_windows = 1; /* Scan our single hose. */ - ret = pci_scan_root_bus_bridge(bridge); - if (ret) { + if (pci_scan_root_bus_bridge(bridge)) { pci_free_host_bridge(bridge); return; } - bus = hose->bus = bridge->bus; pcibios_claim_one_bus(bus); - irongate = pci_get_domain_bus_and_slot(pci_domain_nr(bus), 0, 0); - bus->self = irongate; - bus->resource[0] = &irongate_io; - bus->resource[1] = &irongate_mem; - pci_bus_size_bridges(bus); - /* IO port range. */ - bus->resource[0]->start = 0; - bus->resource[0]->end = 0xffff; - - /* Set up PCI memory range - limit is hardwired to 0xffffffff, - base must be at aligned to 16Mb. */ - bus_align = bus->resource[1]->start; - bus_size = bus->resource[1]->end + 1 - bus_align; + /* Now we've got the size and alignment of PCI memory resources + stored in irongate_mem. Set up the PCI memory range: limit is + hardwired to 0xffffffff, base must be aligned to 16Mb. */ + bus_align = irongate_mem.start; + bus_size = irongate_mem.end + 1 - bus_align; if (bus_align < 0x1000000UL) bus_align = 0x1000000UL; pci_mem = (0x100000000UL - bus_size) & -bus_align; + irongate_mem.start = pci_mem; + irongate_mem.end = 0xffffffffUL; - bus->resource[1]->start = pci_mem; - bus->resource[1]->end = 0xffffffffUL; - if (request_resource(&iomem_resource, bus->resource[1]) < 0) + /* Register our newly calculated PCI memory window in the resource + tree. */ + if (request_resource(&iomem_resource, &irongate_mem) < 0) printk(KERN_ERR "Failed to request MEM on hose 0\n"); + printk(KERN_INFO "Irongate pci_mem %pR\n", &irongate_mem); + if (pci_mem < memtop) memtop = pci_mem; if (memtop > alpha_mv.min_mem_address) { free_reserved_area(__va(alpha_mv.min_mem_address), __va(memtop), -1, NULL); - printk("nautilus_init_pci: %ldk freed\n", + printk(KERN_INFO "nautilus_init_pci: %ldk freed\n", (memtop - alpha_mv.min_mem_address) >> 10); } - if ((IRONGATE0->dev_vendor >> 16) > 0x7006) /* Albacore? */ IRONGATE0->pci_mem = pci_mem; pci_bus_assign_resources(bus); - - /* pci_common_swizzle() relies on bus->self being NULL - for the root bus, so just clear it. */ - bus->self = NULL; pci_bus_add_devices(bus); }