{"id":2222337,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2222337/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260411080148.471335-7-kwilczynski@kernel.org/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.1/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/"},"msgid":"<20260411080148.471335-7-kwilczynski@kernel.org>","date":"2026-04-11T08:01:30","name":"[v4,06/24] PCI/sysfs: Add static PCI resource attribute macros","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"e58bac87ab0428c857721b0e251d09860ce8bd87","submitter":{"id":86709,"url":"http://patchwork.ozlabs.org/api/1.1/people/86709/?format=json","name":"Krzysztof Wilczyński","email":"kwilczynski@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260411080148.471335-7-kwilczynski@kernel.org/mbox/","series":[{"id":499538,"url":"http://patchwork.ozlabs.org/api/1.1/series/499538/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=499538","date":"2026-04-11T08:01:24","name":"PCI: Convert all dynamic sysfs attributes to static","version":4,"mbox":"http://patchwork.ozlabs.org/series/499538/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2222337/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2222337/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=S2e1GHoc;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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lists.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org;\n dkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=S2e1GHoc; dkim-atps=neutral;\n spf=pass (client-ip=172.234.252.31; helo=sea.source.kernel.org;\n envelope-from=kwilczynski@kernel.org;\n receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775894534;\n\tbh=SF6NaKKGKml3gXGCmX67t4OHxTO6Wu63qGLXCgaq56I=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=S2e1GHocFVBu82bQmSDTnd9TJkJZZw86sPm71UzBO41ZJ3MIg25sYmK5shvNcmGDE\n\t VM8vw8ubGLCURt3ntRM7Iw3nWG96efYVMgrJzcGj/tqSjrij0ZoVq1Dx0yViJPvQ7v\n\t MALWft17Kxw01mYkYQuqAE23FDT61+EEb7105Bgem8xad6aUNurkcafXqIZvmo2zz1\n\t KQOOLd13BO6BdZfn9/pJ1YNOlyO1M3ntW7HH53qNp9oa0SJHGMtexWekyA1cqpxeZ2\n\t qAmzF6cBAyd3gPUumHr/eLnz7ZQ42ZW/0HiLr3GFKfmNoE7+ROD5vJ4e8BhLkchjXX\n\t OGYwFmoYfLbpA==","From":"=?utf-8?q?Krzysztof_Wilczy=C5=84ski?= ","To":"Bjorn Helgaas ","Cc":"Bjorn Helgaas ,\n Manivannan Sadhasivam ,\n Lorenzo Pieralisi ,\n Magnus Lindholm , Matt Turner ,\n Richard Henderson ,\n Christophe Leroy ,\n Madhavan Srinivasan ,\n Michael Ellerman , Nicholas Piggin ,\n Dexuan Cui ,\n =?utf-8?q?Krzysztof_Ha=C5=82asa?= ,\n Lukas Wunner , \"Oliver O'Halloran\" ,\n Saurabh Singh Sengar ,\n Shuan He , Srivatsa Bhat ,\n\t=?utf-8?q?Ilpo_J=C3=A4rvinen?= ,\n linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org,\n linuxppc-dev@lists.ozlabs.org","Subject":"[PATCH v4 06/24] PCI/sysfs: Add static PCI resource attribute macros","Date":"Sat, 11 Apr 2026 08:01:30 +0000","Message-ID":"<20260411080148.471335-7-kwilczynski@kernel.org>","X-Mailer":"git-send-email 2.53.0","In-Reply-To":"<20260411080148.471335-1-kwilczynski@kernel.org>","References":"<20260411080148.471335-1-kwilczynski@kernel.org>","X-Mailing-List":"linuxppc-dev@lists.ozlabs.org","List-Id":"","List-Help":"","List-Owner":"","List-Post":"","List-Archive":",\n ","List-Subscribe":",\n ,\n ","List-Unsubscribe":"","Precedence":"list","MIME-Version":"1.0","Content-Type":"text/plain; charset=UTF-8","Content-Transfer-Encoding":"8bit","X-Spam-Status":"No, score=-0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,\n\tDKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"},"content":"Add three macros for declaring static binary attributes for PCI\nresource files:\n\n - pci_dev_resource_io_attr(), for I/O BAR resources (read/write)\n - pci_dev_resource_uc_attr(), for memory BAR resources (mmap uncached)\n - pci_dev_resource_wc_attr(), for write-combine resources (mmap WC)\n\nEach macro only sets the callbacks its resource type needs. The I/O\nmacro conditionally includes mmap support via __PCI_RESOURCE_IO_MMAP_ATTRS\non architectures where arch_can_pci_mmap_io() is true at compile time\n(such as PowerPC, SPARC, and Xtensa).\n\nSigned-off-by: Krzysztof Wilczyński \n---\n drivers/pci/pci-sysfs.c | 41 +++++++++++++++++++++++++++++++++++++++++\n 1 file changed, 41 insertions(+)","diff":"diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c\nindex 4f95b336cc34..ca0074674acc 100644\n--- a/drivers/pci/pci-sysfs.c\n+++ b/drivers/pci/pci-sysfs.c\n@@ -1220,6 +1220,47 @@ static ssize_t pci_write_resource_io(struct file *filp, struct kobject *kobj,\n \treturn pci_resource_io(filp, kobj, attr, buf, off, count, true);\n }\n \n+/*\n+ * generic_file_llseek() consults f_mapping->host to determine\n+ * the file size. As iomem_inode knows nothing about the\n+ * attribute, it's not going to work, so override it as well.\n+ */\n+#if arch_can_pci_mmap_io()\n+# define __PCI_RESOURCE_IO_MMAP_ATTRS\t\t\\\n+\t.f_mapping = iomem_get_mapping,\t\t\\\n+\t.llseek = pci_llseek_resource,\t\t\\\n+\t.mmap = pci_mmap_resource_uc,\n+#else\n+# define __PCI_RESOURCE_IO_MMAP_ATTRS\n+#endif\n+\n+#define pci_dev_resource_io_attr(_bar)\t\t\t\t\t\\\n+static const struct bin_attribute dev_resource##_bar##_io_attr = {\t\\\n+\t.attr = { .name = \"resource\" __stringify(_bar), .mode = 0600 },\t\\\n+\t.private = (void *)(unsigned long)(_bar),\t\t\t\\\n+\t.read = pci_read_resource,\t\t\t\t\t\\\n+\t.write = pci_write_resource,\t\t\t\t\t\\\n+\t__PCI_RESOURCE_IO_MMAP_ATTRS\t\t\t\t\t\\\n+}\n+\n+#define pci_dev_resource_uc_attr(_bar)\t\t\t\t\t\\\n+static const struct bin_attribute dev_resource##_bar##_uc_attr = {\t\\\n+\t.attr = { .name = \"resource\" __stringify(_bar), .mode = 0600 },\t\\\n+\t.private = (void *)(unsigned long)(_bar),\t\t\t\\\n+\t.f_mapping = iomem_get_mapping,\t\t\t\t\t\\\n+\t.llseek = pci_llseek_resource,\t\t\t\t\t\\\n+\t.mmap = pci_mmap_resource_uc,\t\t\t\t\t\\\n+}\n+\n+#define pci_dev_resource_wc_attr(_bar)\t\t\t\t\t\t\\\n+static const struct bin_attribute dev_resource##_bar##_wc_attr = {\t\t\\\n+\t.attr = { .name = \"resource\" __stringify(_bar) \"_wc\", .mode = 0600 },\t\\\n+\t.private = (void *)(unsigned long)(_bar),\t\t\t\t\\\n+\t.f_mapping = iomem_get_mapping,\t\t\t\t\t\t\\\n+\t.llseek = pci_llseek_resource,\t\t\t\t\t\t\\\n+\t.mmap = pci_mmap_resource_wc,\t\t\t\t\t\t\\\n+}\n+\n /**\n * pci_remove_resource_files - cleanup resource files\n * @pdev: dev to cleanup\n","prefixes":["v4","06/24"]}