From patchwork Fri Sep 16 20:01:53 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 671096 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3sbR8h47psz9s2G for ; Sat, 17 Sep 2016 06:05:08 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965128AbcIPUEm (ORCPT ); Fri, 16 Sep 2016 16:04:42 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:23856 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935992AbcIPUCn (ORCPT ); Fri, 16 Sep 2016 16:02:43 -0400 Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u8GK2Tt5022047 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 16 Sep 2016 20:02:30 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0022.oracle.com (8.14.4/8.13.8) with ESMTP id u8GK2TmX010516 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 16 Sep 2016 20:02:29 GMT Received: from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id u8GK2R4V008274; Fri, 16 Sep 2016 20:02:27 GMT Received: from aserv0021.oracle.com (/10.132.126.127) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 16 Sep 2016 13:02:27 -0700 From: Yinghai Lu To: Bjorn Helgaas , David Miller , Benjamin Herrenschmidt Cc: Wei Yang , Khalid Aziz , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu , linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org Subject: [PATCH v14 03/17] PCI: Remove __pci_mmap_make_offset() Date: Fri, 16 Sep 2016 13:01:53 -0700 Message-Id: <20160916200207.21439-4-yinghai@kernel.org> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20160916200207.21439-1-yinghai@kernel.org> References: <20160916200207.21439-1-yinghai@kernel.org> X-Source-IP: userv0022.oracle.com [156.151.31.74] Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org After PCI: Let pci_mmap_page_range() take resource address No user for __pci_mmap_make_offset in those arch. Remove them. Signed-off-by: Yinghai Lu Cc: linuxppc-dev@lists.ozlabs.org Cc: sparclinux@vger.kernel.org Cc: linux-xtensa@linux-xtensa.org --- arch/microblaze/pci/pci-common.c | 63 ---------------------- arch/powerpc/kernel/pci-common.c | 63 ---------------------- arch/sparc/kernel/pci.c | 113 --------------------------------------- arch/xtensa/kernel/pci.c | 62 --------------------- 4 files changed, 301 deletions(-) diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c index 9e3bc05..e7cd0ab 100644 --- a/arch/microblaze/pci/pci-common.c +++ b/arch/microblaze/pci/pci-common.c @@ -156,69 +156,6 @@ void pcibios_set_master(struct pci_dev *dev) */ /* - * Adjust vm_pgoff of VMA such that it is the physical page offset - * corresponding to the 32-bit pci bus offset for DEV requested by the user. - * - * Basically, the user finds the base address for his device which he wishes - * to mmap. They read the 32-bit value from the config space base register, - * add whatever PAGE_SIZE multiple offset they wish, and feed this into the - * offset parameter of mmap on /proc/bus/pci/XXX for that device. - * - * Returns negative error code on failure, zero on success. - */ -static struct resource *__pci_mmap_make_offset(struct pci_dev *dev, - resource_size_t *offset, - enum pci_mmap_state mmap_state) -{ - struct pci_controller *hose = pci_bus_to_host(dev->bus); - unsigned long io_offset = 0; - int i, res_bit; - - if (!hose) - return NULL; /* should never happen */ - - /* If memory, add on the PCI bridge address offset */ - if (mmap_state == pci_mmap_mem) { -#if 0 /* See comment in pci_resource_to_user() for why this is disabled */ - *offset += hose->pci_mem_offset; -#endif - res_bit = IORESOURCE_MEM; - } else { - io_offset = (unsigned long)hose->io_base_virt - _IO_BASE; - *offset += io_offset; - res_bit = IORESOURCE_IO; - } - - /* - * Check that the offset requested corresponds to one of the - * resources of the device. - */ - for (i = 0; i <= PCI_ROM_RESOURCE; i++) { - struct resource *rp = &dev->resource[i]; - int flags = rp->flags; - - /* treat ROM as memory (should be already) */ - if (i == PCI_ROM_RESOURCE) - flags |= IORESOURCE_MEM; - - /* Active and same type? */ - if ((flags & res_bit) == 0) - continue; - - /* In the range of this resource? */ - if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end) - continue; - - /* found it! construct the final physical address */ - if (mmap_state == pci_mmap_io) - *offset += hose->io_base_phys - io_offset; - return rp; - } - - return NULL; -} - -/* * This one is used by /dev/mem and fbdev who have no clue about the * PCI device, it tries to find the PCI device first and calls the * above routine diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 67b2e68..07fa9d5 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -388,69 +388,6 @@ static int pci_read_irq_line(struct pci_dev *pci_dev) */ /* - * Adjust vm_pgoff of VMA such that it is the physical page offset - * corresponding to the 32-bit pci bus offset for DEV requested by the user. - * - * Basically, the user finds the base address for his device which he wishes - * to mmap. They read the 32-bit value from the config space base register, - * add whatever PAGE_SIZE multiple offset they wish, and feed this into the - * offset parameter of mmap on /proc/bus/pci/XXX for that device. - * - * Returns negative error code on failure, zero on success. - */ -static struct resource *__pci_mmap_make_offset(struct pci_dev *dev, - resource_size_t *offset, - enum pci_mmap_state mmap_state) -{ - struct pci_controller *hose = pci_bus_to_host(dev->bus); - unsigned long io_offset = 0; - int i, res_bit; - - if (hose == NULL) - return NULL; /* should never happen */ - - /* If memory, add on the PCI bridge address offset */ - if (mmap_state == pci_mmap_mem) { -#if 0 /* See comment in pci_resource_to_user() for why this is disabled */ - *offset += hose->pci_mem_offset; -#endif - res_bit = IORESOURCE_MEM; - } else { - io_offset = (unsigned long)hose->io_base_virt - _IO_BASE; - *offset += io_offset; - res_bit = IORESOURCE_IO; - } - - /* - * Check that the offset requested corresponds to one of the - * resources of the device. - */ - for (i = 0; i <= PCI_ROM_RESOURCE; i++) { - struct resource *rp = &dev->resource[i]; - int flags = rp->flags; - - /* treat ROM as memory (should be already) */ - if (i == PCI_ROM_RESOURCE) - flags |= IORESOURCE_MEM; - - /* Active and same type? */ - if ((flags & res_bit) == 0) - continue; - - /* In the range of this resource? */ - if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end) - continue; - - /* found it! construct the final physical address */ - if (mmap_state == pci_mmap_io) - *offset += hose->io_base_phys - io_offset; - return rp; - } - - return NULL; -} - -/* * This one is used by /dev/mem and fbdev who have no clue about the * PCI device, it tries to find the PCI device first and calls the * above routine diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c index 5f2d78e..c7d2ce6 100644 --- a/arch/sparc/kernel/pci.c +++ b/arch/sparc/kernel/pci.c @@ -732,119 +732,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask) /* Platform support for /proc/bus/pci/X/Y mmap()s. */ -/* If the user uses a host-bridge as the PCI device, he may use - * this to perform a raw mmap() of the I/O or MEM space behind - * that controller. - * - * This can be useful for execution of x86 PCI bios initialization code - * on a PCI card, like the xfree86 int10 stuff does. - */ -static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma, - enum pci_mmap_state mmap_state) -{ - struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; - unsigned long space_size, user_offset, user_size; - - if (mmap_state == pci_mmap_io) { - space_size = resource_size(&pbm->io_space); - } else { - space_size = resource_size(&pbm->mem_space); - } - - /* Make sure the request is in range. */ - user_offset = vma->vm_pgoff << PAGE_SHIFT; - user_size = vma->vm_end - vma->vm_start; - - if (user_offset >= space_size || - (user_offset + user_size) > space_size) - return -EINVAL; - - if (mmap_state == pci_mmap_io) { - vma->vm_pgoff = (pbm->io_space.start + - user_offset) >> PAGE_SHIFT; - } else { - vma->vm_pgoff = (pbm->mem_space.start + - user_offset) >> PAGE_SHIFT; - } - - return 0; -} - -/* Adjust vm_pgoff of VMA such that it is the physical page offset - * corresponding to the 32-bit pci bus offset for DEV requested by the user. - * - * Basically, the user finds the base address for his device which he wishes - * to mmap. They read the 32-bit value from the config space base register, - * add whatever PAGE_SIZE multiple offset they wish, and feed this into the - * offset parameter of mmap on /proc/bus/pci/XXX for that device. - * - * Returns negative error code on failure, zero on success. - */ -static int __pci_mmap_make_offset(struct pci_dev *pdev, - struct vm_area_struct *vma, - enum pci_mmap_state mmap_state) -{ - unsigned long user_paddr, user_size; - int i, err; - - /* First compute the physical address in vma->vm_pgoff, - * making sure the user offset is within range in the - * appropriate PCI space. - */ - err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state); - if (err) - return err; - - /* If this is a mapping on a host bridge, any address - * is OK. - */ - if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST) - return err; - - /* Otherwise make sure it's in the range for one of the - * device's resources. - */ - user_paddr = vma->vm_pgoff << PAGE_SHIFT; - user_size = vma->vm_end - vma->vm_start; - - for (i = 0; i <= PCI_ROM_RESOURCE; i++) { - struct resource *rp = &pdev->resource[i]; - resource_size_t aligned_end; - - /* Active? */ - if (!rp->flags) - continue; - - /* Same type? */ - if (i == PCI_ROM_RESOURCE) { - if (mmap_state != pci_mmap_mem) - continue; - } else { - if ((mmap_state == pci_mmap_io && - (rp->flags & IORESOURCE_IO) == 0) || - (mmap_state == pci_mmap_mem && - (rp->flags & IORESOURCE_MEM) == 0)) - continue; - } - - /* Align the resource end to the next page address. - * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1), - * because actually we need the address of the next byte - * after rp->end. - */ - aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK; - - if ((rp->start <= user_paddr) && - (user_paddr + user_size) <= aligned_end) - break; - } - - if (i > PCI_ROM_RESOURCE) - return -EINVAL; - - return 0; -} - /* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci * device mapping. */ diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c index 4c5f1fa..97ad3dd 100644 --- a/arch/xtensa/kernel/pci.c +++ b/arch/xtensa/kernel/pci.c @@ -272,68 +272,6 @@ pci_controller_num(struct pci_dev *dev) */ /* - * Adjust vm_pgoff of VMA such that it is the physical page offset - * corresponding to the 32-bit pci bus offset for DEV requested by the user. - * - * Basically, the user finds the base address for his device which he wishes - * to mmap. They read the 32-bit value from the config space base register, - * add whatever PAGE_SIZE multiple offset they wish, and feed this into the - * offset parameter of mmap on /proc/bus/pci/XXX for that device. - * - * Returns negative error code on failure, zero on success. - */ -static __inline__ int -__pci_mmap_make_offset(struct pci_dev *dev, struct vm_area_struct *vma, - enum pci_mmap_state mmap_state) -{ - struct pci_controller *pci_ctrl = (struct pci_controller*) dev->sysdata; - unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; - unsigned long io_offset = 0; - int i, res_bit; - - if (pci_ctrl == 0) - return -EINVAL; /* should never happen */ - - /* If memory, add on the PCI bridge address offset */ - if (mmap_state == pci_mmap_mem) { - res_bit = IORESOURCE_MEM; - } else { - io_offset = (unsigned long)pci_ctrl->io_space.base; - offset += io_offset; - res_bit = IORESOURCE_IO; - } - - /* - * Check that the offset requested corresponds to one of the - * resources of the device. - */ - for (i = 0; i <= PCI_ROM_RESOURCE; i++) { - struct resource *rp = &dev->resource[i]; - int flags = rp->flags; - - /* treat ROM as memory (should be already) */ - if (i == PCI_ROM_RESOURCE) - flags |= IORESOURCE_MEM; - - /* Active and same type? */ - if ((flags & res_bit) == 0) - continue; - - /* In the range of this resource? */ - if (offset < (rp->start & PAGE_MASK) || offset > rp->end) - continue; - - /* found it! construct the final physical address */ - if (mmap_state == pci_mmap_io) - offset += pci_ctrl->io_space.start - io_offset; - vma->vm_pgoff = offset >> PAGE_SHIFT; - return 0; - } - - return -EINVAL; -} - -/* * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci * device mapping. */