Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750804AbWCGF6J (ORCPT ); Tue, 7 Mar 2006 00:58:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751157AbWCGF6J (ORCPT ); Tue, 7 Mar 2006 00:58:09 -0500 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:27858 "EHLO fgwmail5.fujitsu.co.jp") by vger.kernel.org with ESMTP id S1750804AbWCGF6I (ORCPT ); Tue, 7 Mar 2006 00:58:08 -0500 Message-ID: <440D208F.2020202@jp.fujitsu.com> Date: Tue, 07 Mar 2006 14:56:31 +0900 From: Kenji Kaneshige User-Agent: Mozilla Thunderbird 1.0.7 (Windows/20050923) X-Accept-Language: ja, en-us, en MIME-Version: 1.0 To: Greg KH Cc: Kenji Kaneshige , Linux Kernel Mailing List , linux-pci@atrey.karlin.mff.cuni.cz Subject: [PATCH 1/4] PCI legacy I/O port free driver (take5) - changes to generic PCI code References: <440D1FEC.1070701@jp.fujitsu.com> In-Reply-To: <440D1FEC.1070701@jp.fujitsu.com> Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5368 Lines: 168 This patch adds the following changes into generic PCI code especially for PCI legacy free drivers. - Moved the following two things from pci_enable_device() into pci_enable_device_bars(). By this change, we can use pci_enable_device_bars() to enable only the specific regions. o Call pci_fixup_device() on the device o Set dev->is_enabled - Added new field 'bars_enabled' into struct pci_device to remember which BARs already enabled. This new field is initialized at pci_enable_device_bars() time and cleared at pci_disable_device() time. - Changed pci_request_regions()/pci_release_regions() to request/release only the regions which have already been enabled. - Added helper routine pci_select_bars() which makes proper mask of BARs from the specified resource type. This would be very helpful for users of pci_enable_device_bars(). Signed-off-by: Kenji Kaneshige --- drivers/pci/pci-driver.c | 3 ++- drivers/pci/pci.c | 30 +++++++++++++++++++++++------- include/linux/pci.h | 12 ++++++++++++ 3 files changed, 37 insertions(+), 8 deletions(-) Index: linux-2.6.16-rc5-mm2/drivers/pci/pci-driver.c =================================================================== --- linux-2.6.16-rc5-mm2.orig/drivers/pci/pci-driver.c 2006-03-07 13:45:33.000000000 +0900 +++ linux-2.6.16-rc5-mm2/drivers/pci/pci-driver.c 2006-03-07 13:45:39.000000000 +0900 @@ -294,7 +294,8 @@ pci_restore_state(pci_dev); /* if the device was enabled before suspend, reenable */ if (pci_dev->is_enabled) - retval = pci_enable_device(pci_dev); + retval = pci_enable_device_bars(pci_dev, + pci_dev->bars_enabled); /* if the device was busmaster before the suspend, make it busmaster again */ if (pci_dev->is_busmaster) pci_set_master(pci_dev); Index: linux-2.6.16-rc5-mm2/drivers/pci/pci.c =================================================================== --- linux-2.6.16-rc5-mm2.orig/drivers/pci/pci.c 2006-03-07 13:45:33.000000000 +0900 +++ linux-2.6.16-rc5-mm2/drivers/pci/pci.c 2006-03-07 14:07:09.000000000 +0900 @@ -493,6 +493,9 @@ err = pcibios_enable_device(dev, bars); if (err < 0) return err; + pci_fixup_device(pci_fixup_enable, dev); + dev->is_enabled = 1; + dev->bars_enabled = bars; return 0; } @@ -510,8 +513,6 @@ int err = pci_enable_device_bars(dev, (1 << PCI_NUM_RESOURCES) - 1); if (err) return err; - pci_fixup_device(pci_fixup_enable, dev); - dev->is_enabled = 1; return 0; } @@ -546,6 +547,7 @@ pcibios_disable_device(dev); dev->is_enabled = 0; + dev->bars_enabled = 0; } /** @@ -628,6 +630,12 @@ { if (pci_resource_len(pdev, bar) == 0) return; + if (!(pdev->bars_enabled & (1 << bar))) { + dev_warn(&pdev->dev, + "Trying to release region #%d that is not enabled\n", + bar + 1); + return; + } if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) release_region(pci_resource_start(pdev, bar), pci_resource_len(pdev, bar)); @@ -654,7 +662,12 @@ { if (pci_resource_len(pdev, bar) == 0) return 0; - + if (!(pdev->bars_enabled & (1 << bar))) { + dev_warn(&pdev->dev, + "Trying to request region #%d that is not enabled\n", + bar + 1); + goto err_out; + } if (pci_resource_flags(pdev, bar) & IORESOURCE_IO) { if (!request_region(pci_resource_start(pdev, bar), pci_resource_len(pdev, bar), res_name)) @@ -692,7 +705,8 @@ int i; for (i = 0; i < 6; i++) - pci_release_region(pdev, i); + if (pdev->bars_enabled & (1 << i)) + pci_release_region(pdev, i); } /** @@ -713,13 +727,15 @@ int i; for (i = 0; i < 6; i++) - if(pci_request_region(pdev, i, res_name)) - goto err_out; + if (pdev->bars_enabled & (1 << i)) + if(pci_request_region(pdev, i, res_name)) + goto err_out; return 0; err_out: while(--i >= 0) - pci_release_region(pdev, i); + if (pdev->bars_enabled & (1 << i)) + pci_release_region(pdev, i); return -EBUSY; } Index: linux-2.6.16-rc5-mm2/include/linux/pci.h =================================================================== --- linux-2.6.16-rc5-mm2.orig/include/linux/pci.h 2006-03-07 13:45:33.000000000 +0900 +++ linux-2.6.16-rc5-mm2/include/linux/pci.h 2006-03-07 13:45:39.000000000 +0900 @@ -169,6 +169,7 @@ struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */ int rom_attr_enabled; /* has display of the rom attribute been enabled? */ struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */ + int bars_enabled; /* BARs enabled */ }; #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list) @@ -732,6 +733,17 @@ } #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */ +/* + * This helper routine makes bar mask from the type of resource. + */ +static inline int pci_select_bars(struct pci_dev *dev, unsigned long flags) +{ + int i, bars = 0; + for (i = 0; i < PCI_NUM_RESOURCES; i++) + if (pci_resource_flags(dev, i) & flags) + bars |= (1 << i); + return bars; +} /* * The world is not perfect and supplies us with broken PCI devices. - 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/