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GET /api/patches/2221666/?format=api
{ "id": 2221666, "url": "http://patchwork.ozlabs.org/api/patches/2221666/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260410055040.39233-6-kwilczynski@kernel.org/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260410055040.39233-6-kwilczynski@kernel.org>", "list_archive_url": null, "date": "2026-04-10T05:50:25", "name": "[05/20] 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/people/86709/?format=api", "name": "Krzysztof Wilczyński", "email": "kwilczynski@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260410055040.39233-6-kwilczynski@kernel.org/mbox/", "series": [ { "id": 499398, "url": "http://patchwork.ozlabs.org/api/series/499398/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=499398", "date": "2026-04-10T05:50:21", "name": "PCI: Convert all dynamic sysfs attributes to static", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499398/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2221666/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221666/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-52267-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.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=Y9ryeqGM;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; 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a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1775800263; cv=none;\n b=J51YN9n6+jPOWTtqiKrcI6o1RLy2MTlg845LhS7eZJZfkAGbEr/g5t5lXTH7ZXgZ8lEtn0DSN7MUSxmsGml+MPliaXgIjiA3YyVWKoeJ3kTzD3T209eKji98Hnee3JMAATbX+US5j3FD+SKlTZmY9pcw/0JGJ+QrjqPg0bbU7eQ=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1775800263; c=relaxed/simple;\n\tbh=Jl/CqRDCeCLI+hvaYW9X7cU2GJJVSRyyY/vEVWNYR6U=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version:Content-Type;\n b=lN7JqPtdYmmQbs2+0ugTQjccSvtdxoZRRAwmxSnzWIJNIAOX31nZtmYt86ICZDLxhn4VphXaykfD4SPrwp88vu0F+j3SSRZ8KQ7zSlvhMbWdbG5fMdYhsq1f9fVfn7HNr8QvD9dtkhVdPH55PAoiGilkgc5EV+nHpMoZkxxT6VA=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=Y9ryeqGM; arc=none smtp.client-ip=10.30.226.201", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775800262;\n\tbh=Jl/CqRDCeCLI+hvaYW9X7cU2GJJVSRyyY/vEVWNYR6U=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=Y9ryeqGMhfUQt6iNjkMXN+tFxZqVheQae+upre/T2m6AjawDlXhjV6HYvVyaI7EGo\n\t 2ZpxrTWLNwAHa+rQVcfyucCEuha+govFmDAe3UCLb6/X4E3egZmibWhGz+1sIuZis0\n\t dyp/xArjE2f8Nvtq2b05CuE/K5gPJ9BaNvMidTC81SacrhQvO8poGWvEIiUoSKjAow\n\t +Obvt2GnVRLgz/5LB/wWnlcyy72zk/Kfr865EYjx5Oq6vpqexLv85znTJYrpFdJ0s5\n\t nwAGUXr6W43glUhueOuPgN/KMgcr426lM+dlQQnzJkTaREBQ58GRjfejEaZh4FdqB/\n\t Xyxicu/sDHRsA==", "From": "=?utf-8?q?Krzysztof_Wilczy=C5=84ski?= <kwilczynski@kernel.org>", "To": "Bjorn Helgaas <bhelgaas@google.com>", "Cc": "Bjorn Helgaas <helgaas@kernel.org>,\n Manivannan Sadhasivam <mani@kernel.org>,\n Lorenzo Pieralisi <lpieralisi@kernel.org>,\n Magnus Lindholm <linmag7@gmail.com>, Matt Turner <mattst88@gmail.com>,\n Richard Henderson <richard.henderson@linaro.org>,\n Christophe Leroy <chleroy@kernel.org>,\n Madhavan Srinivasan <maddy@linux.ibm.com>,\n Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>,\n Dexuan Cui <decui@microsoft.com>,\n =?utf-8?q?Krzysztof_Ha=C5=82asa?= <khalasa@piap.pl>,\n Lukas Wunner <lukas@wunner.de>, \"Oliver O'Halloran\" <oohall@gmail.com>,\n Saurabh Singh Sengar <ssengar@microsoft.com>,\n Shuan He <heshuan@bytedance.com>, Srivatsa Bhat <srivatsabhat@microsoft.com>,\n\t=?utf-8?q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,\n linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org,\n linuxppc-dev@lists.ozlabs.org", "Subject": "[PATCH 05/20] PCI/sysfs: Add static PCI resource attribute macros", "Date": "Fri, 10 Apr 2026 05:50:25 +0000", "Message-ID": "<20260410055040.39233-6-kwilczynski@kernel.org>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260410055040.39233-1-kwilczynski@kernel.org>", "References": "<20260410055040.39233-1-kwilczynski@kernel.org>", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit" }, "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 <kwilczynski@kernel.org>\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 6b8c8e62f68a..d29d79be8ee5 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": [ "05/20" ] }