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 17CB0CA101F for ; Wed, 10 Sep 2025 14:07:49 +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=hdZlHFK/6K/TmCYzSQpqjrtYzY6SgIuXxYFGBmHGVpk=; b=iysCGFIZ5tYvhRbgNqw80iOZo7 4nBh+rlBMypU3+R3yjLqRC0SFwCidUCIl8pFM1kFgqlVuezbT6GXCpYavQlQIllK98MGvwBDRIZwA gXFBWQmKTZDMLPeQBDRo/AMwGAeh2fJlNXJj5P9/fiiI7U9VzOYqZ7lRsDm7GaV2D55ADEf5ta02U 1qV+nKWgAbp9HkEgPNxz0DL9RP8M9UbfFfGLt9NxHtgux6kSgpAa0snY2fopJT1PRfGaHeCcKdC/8 cBvSPRbZPnthCCiRWIVQ+1b8sGG8G89nAeW7kaXheH5mg8gnuL8590aZu2BfF7xllZmNltwjklpm3 XhM0fpsA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uwLU6-0000000EawW-2fFQ; Wed, 10 Sep 2025 14:07:42 +0000 Received: from lelvem-ot01.ext.ti.com ([198.47.23.234]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uwLU4-0000000EauD-0O3x for linux-arm-kernel@lists.infradead.org; Wed, 10 Sep 2025 14:07:41 +0000 Received: from fllvem-sh03.itg.ti.com ([10.64.41.86]) by lelvem-ot01.ext.ti.com (8.15.2/8.15.2) with ESMTP id 58AE7W12151567; Wed, 10 Sep 2025 09:07:32 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1757513252; bh=hdZlHFK/6K/TmCYzSQpqjrtYzY6SgIuXxYFGBmHGVpk=; h=Date:Subject:To:CC:References:From:In-Reply-To; b=QivxaOUEpObFrdT1mYUud+D90j10dYpkVQ1yXqqUCKcS6g9p5FPDv2E+Bw4yDOG3U qk1lq8YOOhGUGXTEIPXwgE+GBPTixoKLZkYPZq0dE+9kNhve+HK7KeVqKUGysaED7X JDGKPzob2vVjLEPzA3zponvWsIB9bz4PMEHcJKxw= Received: from DLEE103.ent.ti.com (dlee103.ent.ti.com [157.170.170.33]) by fllvem-sh03.itg.ti.com (8.18.1/8.18.1) with ESMTPS id 58AE7Wum420570 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA256 bits=128 verify=FAIL); Wed, 10 Sep 2025 09:07:32 -0500 Received: from DLEE205.ent.ti.com (157.170.170.85) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.55; Wed, 10 Sep 2025 09:07:32 -0500 Received: from lelvem-mr06.itg.ti.com (10.180.75.8) by DLEE205.ent.ti.com (157.170.170.85) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20 via Frontend Transport; Wed, 10 Sep 2025 09:07:32 -0500 Received: from [128.247.81.0] (ula0226330.dhcp.ti.com [128.247.81.0]) by lelvem-mr06.itg.ti.com (8.18.1/8.18.1) with ESMTP id 58AE7WLp288106; Wed, 10 Sep 2025 09:07:32 -0500 Message-ID: <4c9750c3-ba75-46ec-8398-0691d385d0d2@ti.com> Date: Wed, 10 Sep 2025 09:07:31 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 21/34] Revert "arm64: dts: ti: k3-j721e-sk: Fix reversed C6x carveout locations" To: Beleswar Padhi , , , , , , CC: , , , , , , References: <20250908142826.1828676-1-b-padhi@ti.com> <20250908142826.1828676-22-b-padhi@ti.com> Content-Language: en-US From: Andrew Davis In-Reply-To: <20250908142826.1828676-22-b-padhi@ti.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250910_070740_339931_BA268B0E X-CRM114-Status: GOOD ( 20.84 ) 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 9/8/25 9:28 AM, Beleswar Padhi wrote: > This reverts commit 9f3814a7c06b7c7296cf8c1622078ad71820454b. > > The C6x carveouts are reversed intentionally. This is due to the > requirement to keep the DMA memory region as non-cached, however the > minimum granular cache region for C6x is 16MB. So, C66x_0 marks the > entire C66x_1 16MB memory carveouts as non-cached, and uses the DMA > memory region of C66x_1 as its own, and vice-versa. > > This was also called out in the original commit which introduced these > reversed carveouts: > "The minimum granularity on the Cache settings on C66x DSP cores > is 16MB, so the DMA memory regions are chosen such that they are > in separate 16MB regions for each DSP, while reserving a total > of 16 MB for each DSP and not changing the overall DSP > remoteproc carveouts." > > Fixes: 9f3814a7c06b ("arm64: dts: ti: k3-j721e-sk: Fix reversed C6x carveout locations") > Signed-off-by: Beleswar Padhi > --- Still feels like something we should have fixed on the firmware side, but since the firmware is out there already we can live with it. Acked-by: Andrew Davis > v4: Changelog: > 1. Updated carveout node names to generic 'memory@addr' > > Link to v3: > https://lore.kernel.org/all/20250905051846.1189612-21-b-padhi@ti.com/ > > v3: Changelog: > 1. None > > Link to v2: > https://lore.kernel.org/all/20250823160901.2177841-21-b-padhi@ti.com/ > > v2: Changelog: > 1. Re-ordered patch from [PATCH 03/33] to [PATCH v2 20/33]. > > Link to v1: > https://lore.kernel.org/all/20250814223839.3256046-4-b-padhi@ti.com/ > arch/arm64/boot/dts/ti/k3-j721e-sk.dts | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts > index 0f05e65f7bf7..37bc33f2cc26 100644 > --- a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts > +++ b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts > @@ -120,7 +120,8 @@ main_r5fss1_core1_memory_region: memory@a5100000 { > no-map; > }; > > - c66_0_dma_memory_region: memory@a6000000 { > + /* Carveout locations are flipped due to caching */ > + c66_1_dma_memory_region: memory@a6000000 { > compatible = "shared-dma-pool"; > reg = <0x00 0xa6000000 0x00 0x100000>; > no-map; > @@ -132,7 +133,8 @@ c66_0_memory_region: memory@a6100000 { > no-map; > }; > > - c66_1_dma_memory_region: memory@a7000000 { > + /* Carveout locations are flipped due to caching */ > + c66_0_dma_memory_region: memory@a7000000 { > compatible = "shared-dma-pool"; > reg = <0x00 0xa7000000 0x00 0x100000>; > no-map;