From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E704EC83F1A for ; Fri, 11 Jul 2025 19:54:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=V/yGhsELAKAJUNSM8mB/KvPZqZ0SRKM3hiF2dGHaZL8=; b=oDADO/ISrByCws37N7u2C0tnXp FyBSJQbvr9eXQ7kRXH5OamhUlHWppI4BqAFxrX9O8EKykNzRObY7dyUyzPW/4dst+HQFtjgJSmz6w f0nUDMvNahYbOP1LrJbV5FhHYN0BUJOB0my4R0ANYBv8Bzg58dffs7D7zCx08jeUM8eU5KY3ke9oE LUUwJ30UBrtnIWn8Byk+RvI1ufmj96c9jzn24NkQal/mATEHlrAw87BE4kTLWVJhDJkxVFoLV94Tf KHAVfJ8yHWm4wL1NgkR6EXEErEjwWzfYLvj+WP3m+QqHa4AMsZvFSdJKDr3EZnOjI9XRPfG4a8jLO aloSwtkg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uaJpO-0000000FjKM-1awd; Fri, 11 Jul 2025 19:54:38 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uaIdr-0000000FXc1-24cs for linux-arm-kernel@lists.infradead.org; Fri, 11 Jul 2025 18:38:40 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9A3E12247; Fri, 11 Jul 2025 11:38:28 -0700 (PDT) Received: from merodach.members.linode.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 30A013F694; Fri, 11 Jul 2025 11:38:36 -0700 (PDT) From: James Morse To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Rob Herring , Ben Horgan , Rohit Mathew , Shanker Donthineni , Zeng Heng , Lecopzer Chen , Carl Worth , shameerali.kolothum.thodi@huawei.com, D Scott Phillips OS , lcherian@marvell.com, bobo.shaobowang@huawei.com, tan.shaopeng@fujitsu.com, baolin.wang@linux.alibaba.com, Jamie Iles , Xin Hao , peternewman@google.com, dfustini@baylibre.com, amitsinght@marvell.com, David Hildenbrand , Rex Nie , Dave Martin , Koba Ko , James Morse Subject: [RFC PATCH 29/36] arm_mpam: Add helpers to allocate monitors Date: Fri, 11 Jul 2025 18:36:41 +0000 Message-Id: <20250711183648.30766-30-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20250711183648.30766-1-james.morse@arm.com> References: <20250711183648.30766-1-james.morse@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250711_113839_659250_DFF1303D X-CRM114-Status: GOOD ( 11.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org MPAM's MSC support a number of monitors, each of which supports bandwidth counters, or cache-storage-utilisation counters. To use a counter, a monitor needs to be configured. Add helpers to allocate and free CSU or MBWU monitors. Signed-off-by: James Morse --- drivers/platform/arm64/mpam/mpam_devices.c | 2 ++ drivers/platform/arm64/mpam/mpam_internal.h | 35 +++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/platform/arm64/mpam/mpam_devices.c b/drivers/platform/arm64/mpam/mpam_devices.c index 2cf081e7c4b2..b11503d8ef1b 100644 --- a/drivers/platform/arm64/mpam/mpam_devices.c +++ b/drivers/platform/arm64/mpam/mpam_devices.c @@ -338,6 +338,8 @@ mpam_class_alloc(u8 level_idx, enum mpam_class_types type, gfp_t gfp) class->level = level_idx; class->type = type; INIT_LIST_HEAD_RCU(&class->classes_list); + ida_init(&class->ida_csu_mon); + ida_init(&class->ida_mbwu_mon); list_add_rcu(&class->classes_list, &mpam_classes); diff --git a/drivers/platform/arm64/mpam/mpam_internal.h b/drivers/platform/arm64/mpam/mpam_internal.h index 1586d6bd12f0..aca91f7dfbf6 100644 --- a/drivers/platform/arm64/mpam/mpam_internal.h +++ b/drivers/platform/arm64/mpam/mpam_internal.h @@ -230,6 +230,9 @@ struct mpam_class { /* member of mpam_classes */ struct list_head classes_list; + struct ida ida_csu_mon; + struct ida ida_mbwu_mon; + struct mpam_garbage garbage; }; @@ -305,6 +308,38 @@ struct mpam_msc_ris { struct mpam_garbage garbage; }; +static inline int mpam_alloc_csu_mon(struct mpam_class *class) +{ + struct mpam_props *cprops = &class->props; + + if (!mpam_has_feature(mpam_feat_msmon_csu, cprops)) + return -EOPNOTSUPP; + + return ida_alloc_range(&class->ida_csu_mon, 0, cprops->num_csu_mon - 1, + GFP_KERNEL); +} + +static inline void mpam_free_csu_mon(struct mpam_class *class, int csu_mon) +{ + ida_free(&class->ida_csu_mon, csu_mon); +} + +static inline int mpam_alloc_mbwu_mon(struct mpam_class *class) +{ + struct mpam_props *cprops = &class->props; + + if (!mpam_has_feature(mpam_feat_msmon_mbwu, cprops)) + return -EOPNOTSUPP; + + return ida_alloc_range(&class->ida_mbwu_mon, 0, + cprops->num_mbwu_mon - 1, GFP_KERNEL); +} + +static inline void mpam_free_mbwu_mon(struct mpam_class *class, int mbwu_mon) +{ + ida_free(&class->ida_mbwu_mon, mbwu_mon); +} + /* List of all classes - protected by srcu*/ extern struct srcu_struct mpam_srcu; extern struct list_head mpam_classes; -- 2.39.5