From patchwork Tue Jul 30 10:26:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viresh Kumar X-Patchwork-Id: 13747199 Received: from mail-pf1-f169.google.com (mail-pf1-f169.google.com [209.85.210.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E388F1990AD for ; Tue, 30 Jul 2024 10:27:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.169 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722335242; cv=none; b=mA/PDmaRgwRc+AG8HJFDEiV9TR038TSdyxJwqAwyBaEOpxWxFqopCEATuYFbVNuDnhVLImhIO+/pMLKTdGovAkOzeiTS7lU1olzXznmaWCH0cXqn6tWRkLacfmG1M12i1bLFzJBWNOQwl3y+7fNN8gbvaAIb4OttaOSHSaVHpHQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722335242; c=relaxed/simple; bh=u4tTMuWsCVNpmS86dua+fcUTWVSCzwMjLhtud5iXe/k=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=AMAD8V6vA5DXBtMgMm8yhQxzpxdd4gRFrPpfb3/nYKBDhHPINPRlWf8B3f5ow/IySTCpEWvOOEnqN8cbsqFY9h1dQrpFeKx4LxVOzkIyegMUy+xbEywHsg2kiaN1BdMQe6RzQ4GHL4GJqdb7cxj2cR5cF9pZU6G8T7Wq1zsNzAQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=q6cbtZmg; arc=none smtp.client-ip=209.85.210.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="q6cbtZmg" Received: by mail-pf1-f169.google.com with SMTP id d2e1a72fcca58-70d199fb3dfso3693967b3a.3 for ; Tue, 30 Jul 2024 03:27:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1722335239; x=1722940039; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=YAP4JgQUQf4P0DvGAseoga/op/oHSVepCvQsUTCDQr0=; b=q6cbtZmgaWz+g+WV8KKOKrMt5WqnwKvF1PPNW2g32seu2cSsJfDsyUc4uVlYqZaEoe TXpdoXxGQdSXd3lI8ZIKZuaM2rSl7DCrTIQ/qtr+h7jno0kmXjoALD0WuoIreXT6rLYb uzG0wm0WV5v7Y5jxeq5Q3GbJEgl41wxGYaVwHjj5Z6zuW3ZZdDY7buSW1EHx9l2mPKI4 Dwrs4QK5ydNghax6uxPQEXCwvrTXATWeSgQGqiW1lgl5kylB5lIghh7ptoYez7/jMVon 32anTYLfKcG1Nq+8f3M2bO+R/GGVTgPvMA/EMR666Sq1dzI82autuuSKXEq2zuaxfDGb Cy1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722335239; x=1722940039; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=YAP4JgQUQf4P0DvGAseoga/op/oHSVepCvQsUTCDQr0=; b=ZW24N5iRVu5Y2H6crLdgiR5VlmX9P1lc5EVkjOJVaKch+jvnz3pgMzmOiVDmv74+bJ 0llenesE133ttpX/GBxfsC+s100KqcwjYn9AUKuplaI6kpitjMO75QoHkuXAhUmSsjxM bbs8w8oOZwddqyDTYOWpGbRNm1PBF9ONvQ3uGhTSOI77Sb5o0KXaB4XgSHA63mVsuGIz ck/ZZlDV00sx9mYxs9YNkzGtZSkB6J9OkROtHxPtp41CQhCObIMgkCrtuTTfC0JNYrJR VyDREalE1wLozEokz+L0tjZNDmPwmuP7fTa2puEagJnoxu4F2j1EmPrN6yx1xP+kXp/P fakw== X-Gm-Message-State: AOJu0YwZ1kfP71PILV8t54CDZAO0/j8rmVffQ3YCpZxw8X5e062e2seR yuNDWBrEbw/GimT3IAtEDbpvSFn46lRPOSp0EFgfyRWNXD+8dzxtXC5cuClwgz0= X-Google-Smtp-Source: AGHT+IH3JOYNeUn52TjnAuIMzRNvQUM5eXeoYBqqi/ynI2wdeeF43VWgZQHcjLfWP5NoZfwh4szhHQ== X-Received: by 2002:a05:6a20:7487:b0:1c4:8ddb:3fac with SMTP id adf61e73a8af0-1c4a12e0de9mr14002754637.23.1722335239141; Tue, 30 Jul 2024 03:27:19 -0700 (PDT) Received: from localhost ([122.172.84.129]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2cdb73b9b72sm12227081a91.22.2024.07.30.03.27.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jul 2024 03:27:18 -0700 (PDT) From: Viresh Kumar To: "Rafael J. Wysocki" , Miguel Ojeda , Danilo Krummrich , Alex Gaynor , Alice Ryhl , Andreas Hindborg , Benno Lossin , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Boqun Feng , Gary Guo , Miguel Ojeda , Nishanth Menon , Stephen Boyd , Viresh Kumar , Viresh Kumar , Wedson Almeida Filho Cc: linux-pm@vger.kernel.org, Vincent Guittot , rust-for-linux@vger.kernel.org, Manos Pitsidianakis , Erik Schilling , =?utf-8?q?Alex_Benn=C3=A9e?= , Joakim Bech , Rob Herring , linux-kernel@vger.kernel.org Subject: [PATCH V5 0/8] Rust bindings for cpufreq and OPP core + sample driver Date: Tue, 30 Jul 2024 15:56:57 +0530 Message-Id: X-Mailer: git-send-email 2.31.1.272.g89b43f80a514 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hello, This patch series introduces initial Rust bindings for two subsystems: cpufreq and Operating Performance Points (OPP). The bindings cover most of the interfaces exposed by these subsystems. Included in this series is a sample `cpufreq` driver, `rcpufreq-dt`, which is a duplicate of the existing `cpufreq-dt` driver. The `cpufreq-dt` driver is a generic, platform-agnostic, device-tree-based driver used on many ARM platforms. Currently, the implementation has been tested using QEMU, verifying that frequency transitions, various configurations, and driver binding/unbinding functions as expected. However, performance measurements have not been conducted. For those interested in trying these patches, along with a few dependencies, they can be found at: git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux.git rust/cpufreq-dt This series depends on foundational bindings for several other modules, including device/driver, platform driver, OF (Device Tree), clock, and cpumask. Support for these modules is not yet intended for upstream inclusion. The work is based on `staging/rust-device` from the Rust tree, which is derived from v6.10-rc1. V4->V5: - Rename Registration::register() as new(). - Provide a new API: Registration::new_foreign_owned() and use it for rcpufreq_dt driver. - Update MAINTAINERS file. V3->V4: - Fix bugs with freeing of OPP structure. Dropped the Drop routine and fixed reference counting. - Registration object of the cpufreq core is modified a bit to remove the registered field, and few other cleanups. - Use Devres for instead of platform data. - Improve SAFETY comments. V2->V3: - Rebased on latest rust-device changes, which removed `Data` and so few changes were required to make it work. - use srctree links (Alice Ryhl). - Various changes the OPP creation APIs, new APIs: from_raw_opp() and from_raw_opp_owned() (Alice Ryhl). - Inline as_raw() helpers (Alice Ryhl). - Add new interface (`OPP::Token`) for dynamically created OPPs. - Add Reviewed-by tag from Manos. - Modified/simplified cpufreq registration structure / method a bit. V1->V2: - Create and use separate bindings for OF, clk, cpumask, etc (not included in this patchset but pushed to the above branch). This helped removing direct calls from the driver. - Fix wrong usage of Pinning + Vec. - Use Token for OPP Config. - Use Opaque, transparent and Aref for few structures. - Broken down into smaller patches to make it easy for reviewers. - Based over staging/rust-device. Thanks. Viresh Kumar (8): rust: Add initial bindings for OPP framework rust: Extend OPP bindings for the OPP table rust: Extend OPP bindings for the configuration options rust: Add initial bindings for cpufreq framework rust: Extend cpufreq bindings for policy and driver ops rust: Extend cpufreq bindings for driver registration rust: Extend OPP bindings with CPU frequency table cpufreq: Add Rust based cpufreq-dt driver MAINTAINERS | 2 + drivers/cpufreq/Kconfig | 12 + drivers/cpufreq/Makefile | 1 + drivers/cpufreq/rcpufreq_dt.rs | 221 +++++++ rust/bindings/bindings_helper.h | 2 + rust/helpers.c | 15 + rust/kernel/cpufreq.rs | 1039 +++++++++++++++++++++++++++++++ rust/kernel/lib.rs | 4 + rust/kernel/opp.rs | 925 +++++++++++++++++++++++++++ 9 files changed, 2221 insertions(+) create mode 100644 drivers/cpufreq/rcpufreq_dt.rs create mode 100644 rust/kernel/cpufreq.rs create mode 100644 rust/kernel/opp.rs