Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932931AbcCCQzB (ORCPT ); Thu, 3 Mar 2016 11:55:01 -0500 Received: from mail.kernel.org ([198.145.29.136]:48636 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932886AbcCCQy4 (ORCPT ); Thu, 3 Mar 2016 11:54:56 -0500 Subject: [PATCH v1 08/12] ia64/PCI: Keep CPU physical (not virtual) addresses in shadow ROM resource To: linux-pci@vger.kernel.org From: Bjorn Helgaas Cc: Matthew Garrett , Tony Luck , DRI , Fenghua Yu , Intel Graphics Development , linux-kernel@vger.kernel.org, Ralf Baechle , Andy Lutomirski , Bruno =?utf-8?q?Pr=C3=A9mont?= , Daniel Stone , Alex Deucher , Linus Torvalds , Ville =?utf-8?b?U3lyasOkbMOk?= Date: Thu, 03 Mar 2016 10:54:52 -0600 Message-ID: <20160303165452.3025.73760.stgit@bhelgaas-glaptop2.roam.corp.google.com> In-Reply-To: <20160303164533.3025.82439.stgit@bhelgaas-glaptop2.roam.corp.google.com> References: <20160303164533.3025.82439.stgit@bhelgaas-glaptop2.roam.corp.google.com> User-Agent: StGit/0.16 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3338 Lines: 93 A struct resource contains CPU physical addresses, not virtual addresses. But sn_acpi_slot_fixup() and sn_io_slot_fixup() stored the virtual address of a shadow ROM copy in the resource. To compensate, pci_map_rom() had a special case that returned the resource address directly rather than calling ioremap() on it. When we're using a shadow copy in RAM or PROM, disable the ROM BAR and release the address space it was consuming. Store the CPU physical (not virtual) address in the shadow ROM resource, and mark the resource as IORESOURCE_ROM_SHADOW so we use the normal pci_map_rom() path that ioremaps the copy. Signed-off-by: Bjorn Helgaas --- arch/ia64/sn/kernel/io_acpi_init.c | 18 +++++++++++------- arch/ia64/sn/kernel/io_init.c | 17 +++++------------ 2 files changed, 16 insertions(+), 19 deletions(-) diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c index 815c291..231234c 100644 --- a/arch/ia64/sn/kernel/io_acpi_init.c +++ b/arch/ia64/sn/kernel/io_acpi_init.c @@ -430,7 +430,7 @@ sn_acpi_slot_fixup(struct pci_dev *dev) struct pcidev_info *pcidev_info = NULL; struct sn_irq_info *sn_irq_info = NULL; struct resource *res; - size_t image_size, size; + size_t size; if (sn_acpi_get_pcidev_info(dev, &pcidev_info, &sn_irq_info)) { panic("%s: Failure obtaining pcidev_info for %s\n", @@ -444,13 +444,17 @@ sn_acpi_slot_fixup(struct pci_dev *dev) * of the shadowed copy, and the actual length of the ROM image. */ size = pci_resource_len(dev, PCI_ROM_RESOURCE); - addr = ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE], - size); - image_size = pci_get_rom_size(dev, addr, size); + res = &dev->resource[PCI_ROM_RESOURCE]; - res->start = (unsigned long) addr; - res->end = (unsigned long) addr + image_size - 1; - res->flags |= IORESOURCE_ROM_BIOS_COPY; + + pci_disable_rom(dev); + if (res->parent) + release_resource(res); + + res->start = pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]; + res->end = res->start + size - 1; + res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW | + IORESOURCE_PCI_FIXED; } sn_pci_fixup_slot(dev, pcidev_info, sn_irq_info); } diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c index 0227e20..c15a41e 100644 --- a/arch/ia64/sn/kernel/io_init.c +++ b/arch/ia64/sn/kernel/io_init.c @@ -185,8 +185,7 @@ sn_io_slot_fixup(struct pci_dev *dev) if (size == 0) continue; - res->start = ioremap(pcidev_info->pdi_pio_mapped_addr[idx], - size + 1); + res->start = pcidev_info->pdi_pio_mapped_addr[idx]; res->end = addr + size; /* @@ -201,18 +200,12 @@ sn_io_slot_fixup(struct pci_dev *dev) else insert_resource(&iomem_resource, res); /* - * If ROM, set the actual ROM image size, and mark as - * shadowed in PROM. + * If ROM, mark as shadowed in PROM. */ if (idx == PCI_ROM_RESOURCE) { - size_t image_size; - void __iomem *rom; - - rom = ioremap(pci_resource_start(dev, PCI_ROM_RESOURCE), - size + 1); - image_size = pci_get_rom_size(dev, rom, size + 1); - res->end = res->start + image_size - 1; - res->flags |= IORESOURCE_ROM_BIOS_COPY; + pci_disable_rom(dev); + res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW | + IORESOURCE_PCI_FIXED; } }