From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751571AbWCJPQd (ORCPT ); Fri, 10 Mar 2006 10:16:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751423AbWCJPQd (ORCPT ); Fri, 10 Mar 2006 10:16:33 -0500 Received: from gate.crashing.org ([63.228.1.57]:23470 "EHLO gate.crashing.org") by vger.kernel.org with ESMTP id S1751571AbWCJPQc (ORCPT ); Fri, 10 Mar 2006 10:16:32 -0500 Date: Fri, 10 Mar 2006 09:05:58 -0600 (CST) From: Kumar Gala X-X-Sender: galak@gate.crashing.org To: Greg KH cc: linux-pci@atrey.karlin.mff.cuni.cz, Subject: Re: [PATCH] In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ack, this is what I get for sending patches before I've actually gotten up. The first line was suppose to be the subject line, oh well will resend this. - k On Fri, 10 Mar 2006, Kumar Gala wrote: > PCI: Add pci_assign_resource_fixed -- allow fixed address assignments > > On some embedded systems the PCI address for hotplug devices are not only > known a priori but are required to be at a given PCI address for other > master in the system to be able to access. > > An example of such a system would be an FPGA which is setup from user space > after the system has booted. The FPGA may be access by DSPs in the system > and those DSPs expect the FPGA at a fixed PCI address. > > Added pci_assign_resource_fixed() as a way to allow assignment of the PCI > devices's BARs at fixed PCI addresses. > > Signed-off-by: Kumar Gala > > --- > commit 45d4a23317c459865ec740c80b6e2a2ad9f53fd3 > tree 432b5e41ef5f231dd57eb1a98f103239c62d63a0 > parent 8176dee014ec6ad1039b8c0075c9c1d02147c2c8 > author Kumar Gala Thu, 09 Mar 2006 12:34:25 -0600 > committer Kumar Gala Thu, 09 Mar 2006 12:34:25 -0600 > > drivers/pci/pci.c | 1 + > drivers/pci/setup-res.c | 35 +++++++++++++++++++++++++++++++++++ > include/linux/pci.h | 1 + > 3 files changed, 37 insertions(+), 0 deletions(-) > > diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c > index d2d1879..2557e86 100644 > --- a/drivers/pci/pci.c > +++ b/drivers/pci/pci.c > @@ -935,6 +935,7 @@ EXPORT_SYMBOL_GPL(pci_intx); > EXPORT_SYMBOL(pci_set_dma_mask); > EXPORT_SYMBOL(pci_set_consistent_dma_mask); > EXPORT_SYMBOL(pci_assign_resource); > +EXPORT_SYMBOL(pci_assign_resource_fixed); > EXPORT_SYMBOL(pci_find_parent_resource); > > EXPORT_SYMBOL(pci_set_power_state); > diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c > index ea9277b..f485958 100644 > --- a/drivers/pci/setup-res.c > +++ b/drivers/pci/setup-res.c > @@ -155,6 +155,41 @@ int pci_assign_resource(struct pci_dev * > return ret; > } > > +int pci_assign_resource_fixed(struct pci_dev *dev, int resno) > +{ > + struct pci_bus *bus = dev->bus; > + struct resource *res = dev->resource + resno; > + unsigned int type_mask; > + int i, ret = -EBUSY; > + > + type_mask = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH; > + > + for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { > + struct resource *r = bus->resource[i]; > + if (!r) > + continue; > + > + /* type_mask must match */ > + if ((res->flags ^ r->flags) & type_mask) > + continue; > + > + ret = request_resource(r, res); > + > + if (ret == 0) > + break; > + } > + > + if (ret) { > + printk(KERN_ERR "PCI: Failed to allocate %s resource #%d:%lx@%lx for %s\n", > + res->flags & IORESOURCE_IO ? "I/O" : "mem", > + resno, res->end - res->start + 1, res->start, pci_name(dev)); > + } else if (resno < PCI_BRIDGE_RESOURCES) { > + pci_update_resource(dev, res, resno); > + } > + > + return ret; > +} > + > /* Sort resources by alignment */ > void __devinit > pdev_sort_resources(struct pci_dev *dev, struct resource_list *head) > diff --git a/include/linux/pci.h b/include/linux/pci.h > index fe1a2b0..0db1e2d 100644 > --- a/include/linux/pci.h > +++ b/include/linux/pci.h > @@ -460,6 +460,7 @@ int pci_set_dma_mask(struct pci_dev *dev > int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask); > void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno); > int pci_assign_resource(struct pci_dev *dev, int i); > +int pci_assign_resource_fixed(struct pci_dev *dev, int i); > void pci_restore_bars(struct pci_dev *dev); > > /* ROM control related routines */ > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >