From nobody Tue Dec 16 11:45:06 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D104C77B73 for ; Wed, 19 Apr 2023 11:12:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233008AbjDSLMI (ORCPT ); Wed, 19 Apr 2023 07:12:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38616 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232954AbjDSLLV (ORCPT ); Wed, 19 Apr 2023 07:11:21 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D090DA256 for ; Wed, 19 Apr 2023 04:10:40 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-1a6ebc66ca4so14849545ad.3 for ; Wed, 19 Apr 2023 04:10:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20221208.gappssmtp.com; s=20221208; t=1681902634; x=1684494634; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=8VRpPNkDuAyz+Ft5imrcs9KDU5p5mtKUYR9cIj3QRd4=; b=x/8pGfsLNTo4M60IL76aQ5x040uI2InLj1/EScIFp6VYlhbjP5l3eNVgN+y4avjRTt H5fzYWvVhJT2Rq7bzjd2zo6SGa9b70+iPd7q+BYZOfnbxUKSB2gBI+v9EID/w220Xv6A ogg1jlEVmqJYIyFKd2qTHBIQq91+m87zuaTfEpDGjS4JjD5plCp7XDP57KjGuKZ+kOiN SVYdRu2DZSdcypVQLwcCpNb8l4lKH0jilJ++oP1hk4KiAaDnMtqJcq8eN39x6hZzCeaP j6FiQUn7+p1qacItyHJxcwZOT4dU4m7qvkAF3FVlQoqYsjD4V5HP3V7p3ikdeOowNAkl 8kWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681902634; x=1684494634; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=8VRpPNkDuAyz+Ft5imrcs9KDU5p5mtKUYR9cIj3QRd4=; b=UJDqwXHbQyurQINW5R0/7MTORD3H4DlttpBM9b8kk3HMN08fDkwfW1dKsBRbCH2dDB cqSStq8HzBDUqttLGn/Z+PI7g3k6a3nW91u98ZPUbRrTynjZeyT1Hc2PKMZGlJKgkEN1 /RsN7xpD0PQygAO5i2a6RUwyDdk4K6IObXHAodeyst7dqLZYXYH87CZ5WdUiMvISIWpl yTg1Z4KoVLhU9K+2FDQ6I5TX5XcCAhGjAjx2JecsrNhF94bhnEA9WYktL/EFU97tu+im +16kDREF7nmRToPb+ZOy8MpMokdjhaUCwANuzujdjLZBGKZ+IwRvleXddqEHfvJrP0We 3gWg== X-Gm-Message-State: AAQBX9fImShDoODop+gI/LxVGChbBsmjewnvwMPCpq1HA1w2rwSEYKKO sNSVLvuJ6XXFbbFGElAV6evUFQ== X-Google-Smtp-Source: AKy350boG05NBC+OyMdfVB4g1lkdqwK+pdBb8M8du2YV2tJ6Pxg4DvMv0hsz2y7ET8IQwFhAUURrrw== X-Received: by 2002:a17:902:db0f:b0:1a1:a9a4:ba26 with SMTP id m15-20020a170902db0f00b001a1a9a4ba26mr5908976plx.8.1681902634412; Wed, 19 Apr 2023 04:10:34 -0700 (PDT) Received: from x1.hsd1.or.comcast.net ([2601:1c2:1800:f680:eaf2:1d7a:7338:16cb]) by smtp.gmail.com with ESMTPSA id g12-20020a1709026b4c00b001a24cded097sm11180774plt.236.2023.04.19.04.10.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Apr 2023 04:10:33 -0700 (PDT) From: Drew Fustini To: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Palmer Dabbelt , Paul Walmsley , Conor Dooley , Ved Shanbhogue , =?UTF-8?q?Kornel=20Dul=C4=99ba?= , Adrien Ricciardi , Nicolas Pitre , Fenghua Yu , Reinette Chatre , Babu Moger , Peter Newman , x86@kernel.org, Rob Herring , James Morse Cc: Drew Fustini Subject: [RFC PATCH 17/21] DO_NOT_MERGE soc: add Foobar SoC memory controller driver Date: Wed, 19 Apr 2023 04:11:07 -0700 Message-Id: <20230419111111.477118-18-dfustini@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230419111111.477118-1-dfustini@baylibre.com> References: <20230419111111.477118-1-dfustini@baylibre.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add example driver for a SoC memory controller that implements CBQRI. Co-developed-by: Adrien Ricciardi Signed-off-by: Adrien Ricciardi Signed-off-by: Drew Fustini --- drivers/soc/foobar/foobar_cbqri_memory.c | 83 ++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 drivers/soc/foobar/foobar_cbqri_memory.c diff --git a/drivers/soc/foobar/foobar_cbqri_memory.c b/drivers/soc/foobar/= foobar_cbqri_memory.c new file mode 100644 index 000000000000..0a0c542a25e1 --- /dev/null +++ b/drivers/soc/foobar/foobar_cbqri_memory.c @@ -0,0 +1,83 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Foobar Systems CBQRI memory controller + */ + +#define pr_fmt(fmt) "foobar-mem: " fmt + +#include +#include +#include + +static const struct of_device_id foobar_cbqri_memory_ids[] =3D { + { .compatible =3D "foobar,memory-controller" }, + { } +}; + +static int __init foobar_cbqri_memory_init(void) +{ + struct device_node *np; + int err; + u32 value; + struct cbqri_controller_info *ctrl_info; + + for_each_matching_node(np, foobar_cbqri_memory_ids) { + if (!of_device_is_available(np)) { + of_node_put(np); + continue; + } + + ctrl_info =3D kzalloc(sizeof(*ctrl_info), GFP_KERNEL); + if (!ctrl_info) + goto err_node_put; + ctrl_info->type =3D CBQRI_CONTROLLER_TYPE_BANDWIDTH; + + err =3D of_property_read_u32_index(np, "reg", 1, &value); + if (err) { + pr_err("Failed to read reg base address (%d)", err); + goto err_kfree_ctrl_info; + } + ctrl_info->addr =3D value; + + err =3D of_property_read_u32_index(np, "reg", 3, &value); + if (err) { + pr_err("Failed to read reg size (%d)", err); + goto err_kfree_ctrl_info; + } + ctrl_info->size =3D value; + + err =3D of_property_read_u32(np, "riscv,cbqri-rcid", &value); + if (err) { + pr_err("Failed to read RCID count (%d)", err); + goto err_kfree_ctrl_info; + } + ctrl_info->rcid_count =3D value; + + err =3D of_property_read_u32(np, "riscv,cbqri-mcid", &value); + if (err) { + pr_err("Failed to read MCID count (%d)", err); + goto err_kfree_ctrl_info; + } + ctrl_info->mcid_count =3D value; + + of_node_put(np); + + pr_debug("addr=3D0x%lx max-rcid=3D%u max-mcid=3D%u", ctrl_info->addr, + ctrl_info->rcid_count, ctrl_info->mcid_count); + + /* Fill the list shared with RISC-V QoS resctrl */ + INIT_LIST_HEAD(&ctrl_info->list); + list_add_tail(&ctrl_info->list, &cbqri_controllers); + } + + return 0; + +err_kfree_ctrl_info: + kfree(ctrl_info); + +err_node_put: + of_node_put(np); + + return err; +} +device_initcall(foobar_cbqri_memory_init); --=20 2.34.1