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 2D1FBC3DA4A for ; Sun, 11 Aug 2024 21:04:58 +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: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=hhwUYVWQargogqMYBVEgIa27lfgjOztqreLsgQMR2Qo=; b=ED2Q4xDmzy5x+Ur17VOHPtaMHI V2DELjOA9iSQdeSzS4i0TBWDT0fle94Mqg1AKn9RQiSsCzwC92yzPSl5fdEteU3rUBd8njFxkdBk4 Hg3TCLLBhfWXPUyL+L/WW7Ae+A7VOdMc0sV7PCrE6xTwwSSFApcsa+DT0FwajuWJklTk84hhj/Y3k tY+kZ4Q2wtxg7/MslLUFFE2HXiiSNF4r2Q3t39inQSbDx8X3HAa4WQiWUWpSSsqFZmc4wkU/T+RBH v41eVvoUDRFSiTqJ8DBH46nmynsLE7aMdu5N9sin72XlIztrT/rKuqe6sz/gjui+Aopmo5CyVYc+c 2OmrMhxw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sdFjx-0000000GFrQ-0fZ6; Sun, 11 Aug 2024 21:04:37 +0000 Received: from mail-oa1-x2d.google.com ([2001:4860:4864:20::2d]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sdFjL-0000000GFjL-3h8e for linux-arm-kernel@lists.infradead.org; Sun, 11 Aug 2024 21:04:01 +0000 Received: by mail-oa1-x2d.google.com with SMTP id 586e51a60fabf-261112c303bso2949534fac.1 for ; Sun, 11 Aug 2024 14:03:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1723410238; x=1724015038; darn=lists.infradead.org; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to; bh=hhwUYVWQargogqMYBVEgIa27lfgjOztqreLsgQMR2Qo=; b=d9O5gqhpeCNrcjwcVcq/1SXJr1uFwdfWlYKswCfO5CQtn72E67Vm9mB/8VsIkhigeZ vn4esg/cElDX4LeHm3cJCWp6ULshtJLSdXYfL4FHTVX951tT1q9ZxP5dstqLPeyh5sQR p1FetWgPtsou99fP6io0G2GttaysZ5F6dcbTI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723410238; x=1724015038; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=hhwUYVWQargogqMYBVEgIa27lfgjOztqreLsgQMR2Qo=; b=S1rtKzDyi9k6Bn8/cN1dJpr/6/dehnCqlH4TLZaj3a+sKsH4C4Zd0vK7VZHbgD8DCE NBHq4Aeepd3lw1jVzDk2FxtrgpGeA8MZJxg6QDxvK+1A029qS+QF8o0FBAJczV+zBRVO YJCkIjNCXfkkzq1knWayTalS1y6cYb2509snfnXgq2iKQjpYHUODT0ABRJjYe2CiJTcq 9rYKd2ftMhMuj7rhiZ3KGHR/BRFCNQv54Y0ESz/+LhKcYop9XBZywmRAZPcPr7RP91k0 Tz8Bo6L7MJDYX0Ad2s6bc20ywVh6avRUKWGYNd3asbAQB/Iz9hWle2CC4Eqi5sji5j3p PJnQ== X-Forwarded-Encrypted: i=1; AJvYcCVVuF6OTaQBjD7CxbID54Muce+woWwU9GXQq01Sw6pkmDzcNIuPmfEbVTCU8bw+qJmnkUbvQVOHFfCixANprz8LOsmPuXEvkQns9ZivcvbMF8BANVQ= X-Gm-Message-State: AOJu0Yywilx9oxIsZFcoKUAuayaUyYnv+CeWaCDVkqVyXOdH9kz9X/dK u0MdJq+YrboYStYoBG5acDLK+1EnxEVULV8p1mxPlJc/6i8JSkHapl6QnGg+ZQ== X-Google-Smtp-Source: AGHT+IH/KDSs7jY3xVlPdKDzbeU9AQUy3KjKyKP9vIgMarHgOicfawNZYm+Cmc0SbcTNJs3UiPkmJw== X-Received: by 2002:a05:6871:4ccc:b0:26c:64f8:d6ba with SMTP id 586e51a60fabf-26c64f9d27dmr7398335fac.41.1723410238276; Sun, 11 Aug 2024 14:03:58 -0700 (PDT) Received: from [192.168.1.3] (ip68-4-215-93.oc.oc.cox.net. [68.4.215.93]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-710e58ca645sm2837308b3a.94.2024.08.11.14.03.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 11 Aug 2024 14:03:57 -0700 (PDT) Message-ID: <6d601728-7f38-400c-9a51-8170d33f0055@broadcom.com> Date: Sun, 11 Aug 2024 14:03:50 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] firmware: arm_scmi: Support 'reg-io-width' property for shared memory To: Peng Fan , "linux-arm-kernel@lists.infradead.org" Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sudeep Holla , Cristian Marussi , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , open list , "arm-scmi@vger.kernel.org" , "james.quinlan@broadcom.com" , "justin.chen@broadcom.com" , "kapil.hali@broadcom.com" , "bcm-kernel-feedback-list@broadcom.com" References: <20240810214621.14417-1-florian.fainelli@broadcom.com> <20240810214621.14417-3-florian.fainelli@broadcom.com> Content-Language: en-US From: Florian Fainelli Autocrypt: addr=florian.fainelli@broadcom.com; keydata= xsBNBFPAG8ABCAC3EO02urEwipgbUNJ1r6oI2Vr/+uE389lSEShN2PmL3MVnzhViSAtrYxeT M0Txqn1tOWoIc4QUl6Ggqf5KP6FoRkCrgMMTnUAINsINYXK+3OLe7HjP10h2jDRX4Ajs4Ghs JrZOBru6rH0YrgAhr6O5gG7NE1jhly+EsOa2MpwOiXO4DE/YKZGuVe6Bh87WqmILs9KvnNrQ PcycQnYKTVpqE95d4M824M5cuRB6D1GrYovCsjA9uxo22kPdOoQRAu5gBBn3AdtALFyQj9DQ KQuc39/i/Kt6XLZ/RsBc6qLs+p+JnEuPJngTSfWvzGjpx0nkwCMi4yBb+xk7Hki4kEslABEB AAHNMEZsb3JpYW4gRmFpbmVsbGkgPGZsb3JpYW4uZmFpbmVsbGlAYnJvYWRjb20uY29tPsLB IQQQAQgAywUCZWl41AUJI+Jo+hcKAAG/SMv+fS3xUQWa0NryPuoRGjsA3SAUAAAAAAAWAAFr ZXktdXNhZ2UtbWFza0BwZ3AuY29tjDAUgAAAAAAgAAdwcmVmZXJyZWQtZW1haWwtZW5jb2Rp bmdAcGdwLmNvbXBncG1pbWUICwkIBwMCAQoFF4AAAAAZGGxkYXA6Ly9rZXlzLmJyb2FkY29t Lm5ldAUbAwAAAAMWAgEFHgEAAAAEFQgJChYhBNXZKpfnkVze1+R8aIExtcQpvGagAAoJEIEx tcQpvGagWPEH/2l0DNr9QkTwJUxOoP9wgHfmVhqc0ZlDsBFv91I3BbhGKI5UATbipKNqG13Z TsBrJHcrnCqnTRS+8n9/myOF0ng2A4YT0EJnayzHugXm+hrkO5O9UEPJ8a+0553VqyoFhHqA zjxj8fUu1px5cbb4R9G4UAySqyeLLeqnYLCKb4+GklGSBGsLMYvLmIDNYlkhMdnnzsSUAS61 WJYW6jjnzMwuKJ0ZHv7xZvSHyhIsFRiYiEs44kiYjbUUMcXor/uLEuTIazGrE3MahuGdjpT2 IOjoMiTsbMc0yfhHp6G/2E769oDXMVxCCbMVpA+LUtVIQEA+8Zr6mX0Yk4nDS7OiBlvOwE0E U8AbwQEIAKxr71oqe+0+MYCc7WafWEcpQHFUwvYLcdBoOnmJPxDwDRpvU5LhqSPvk/yJdh9k 4xUDQu3rm1qIW2I9Puk5n/Jz/lZsqGw8T13DKyu8eMcvaA/irm9lX9El27DPHy/0qsxmxVmU pu9y9S+BmaMb2CM9IuyxMWEl9ruWFS2jAWh/R8CrdnL6+zLk60R7XGzmSJqF09vYNlJ6Bdbs MWDXkYWWP5Ub1ZJGNJQ4qT7g8IN0qXxzLQsmz6tbgLMEHYBGx80bBF8AkdThd6SLhreCN7Uh IR/5NXGqotAZao2xlDpJLuOMQtoH9WVNuuxQQZHVd8if+yp6yRJ5DAmIUt5CCPcAEQEAAcLB gQQYAQIBKwUCU8AbwgUbDAAAAMBdIAQZAQgABgUCU8AbwQAKCRCTYAaomC8PVQ0VCACWk3n+ obFABEp5Rg6Qvspi9kWXcwCcfZV41OIYWhXMoc57ssjCand5noZi8bKg0bxw4qsg+9cNgZ3P N/DFWcNKcAT3Z2/4fTnJqdJS//YcEhlr8uGs+ZWFcqAPbteFCM4dGDRruo69IrHfyyQGx16s CcFlrN8vD066RKevFepb/ml7eYEdN5SRALyEdQMKeCSf3mectdoECEqdF/MWpfWIYQ1hEfdm C2Kztm+h3Nkt9ZQLqc3wsPJZmbD9T0c9Rphfypgw/SfTf2/CHoYVkKqwUIzI59itl5Lze+R5 wDByhWHx2Ud2R7SudmT9XK1e0x7W7a5z11Q6vrzuED5nQvkhAAoJEIExtcQpvGagugcIAJd5 EYe6KM6Y6RvI6TvHp+QgbU5dxvjqSiSvam0Ms3QrLidCtantcGT2Wz/2PlbZqkoJxMQc40rb fXa4xQSvJYj0GWpadrDJUvUu3LEsunDCxdWrmbmwGRKqZraV2oG7YEddmDqOe0Xm/NxeSobc MIlnaE6V0U8f5zNHB7Y46yJjjYT/Ds1TJo3pvwevDWPvv6rdBeV07D9s43frUS6xYd1uFxHC 7dZYWJjZmyUf5evr1W1gCgwLXG0PEi9n3qmz1lelQ8lSocmvxBKtMbX/OKhAfuP/iIwnTsww 95A2SaPiQZA51NywV8OFgsN0ITl2PlZ4Tp9hHERDe6nQCsNI/Us= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240811_140400_033361_851FB2B4 X-CRM114-Status: GOOD ( 15.07 ) 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 On 8/11/2024 5:42 AM, Peng Fan wrote: >> Subject: [PATCH 2/2] firmware: arm_scmi: Support 'reg-io-width' >> property for shared memory >> >> Some shared memory areas might only support a certain access width, >> (e.g.: 32 bits accesses only). Update the shmem layer to support >> reading from and writing to such shared memory area using the >> specified I/O width in the Device Tree. The various transport layers >> making use of the shmem.c code are updated accordingly to pass the >> I/O width to the routines that need it. >> >> Signed-off-by: Florian Fainelli >> --- > > [...] >> } >> >> static void smc_mark_txdone(struct scmi_chan_info *cinfo, int ret, diff >> --git a/drivers/firmware/arm_scmi/shmem.c >> b/drivers/firmware/arm_scmi/shmem.c >> index 01d8a9398fe8..192262d63baa 100644 >> --- a/drivers/firmware/arm_scmi/shmem.c >> +++ b/drivers/firmware/arm_scmi/shmem.c >> @@ -34,9 +34,20 @@ struct scmi_shared_mem { >> u8 msg_payload[]; >> }; >> >> +#define __shmem_copy_toio_tpl(s) \ >> + for (unsigned int i = 0; i < xfer->tx.len; i += shmem_io_width) >> \ >> + iowrite##s(((u##s *)(xfer->tx.buf))[i / shmem_io_width], >> \ >> + shmem->msg_payload + i); > > there will be a barrier with iowrite, use raw_write##s? Makes sense, and that matches what memcpy_{from,to}_io() does, too. > >> + >> +#define __shmem_copy_fromio_tpl(s) \ >> + for (unsigned int i = 0; i < xfer->rx.len; i += shmem_io_width) >> \ >> + ((u##s *)(xfer->rx.buf))[i / shmem_io_width] = >> \ >> + ioread##s(shmem->msg_payload + >> shmem_io_width + i); > > Use raw_ioread##s? Agreed. -- Florian