From nobody Sun Feb 8 12:37:29 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9975332900; Mon, 27 Oct 2025 18:55:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761591316; cv=none; b=srbadbKbaurzWCyUW4SMDrB2cXrtuncFeILXLK5sPLTrJuX/sVWtF1WRw+ruQ45awPZhix5uCsDiIO+ZK0uqKxqxlWIFHy7P1d4LgIul3uJM18YtP9Adamp95AV0vnISSellcpRD7Chg/MGBXbWM6h6KjYnQYHN2Zoo5zXwIvsk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761591316; c=relaxed/simple; bh=g2mmajcxbCrl4r+56yYrwyyJINURxPSPFab71xwisCM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=uB2TR3e2bOPuWvbNr3w/GwXoo0YruHsKu9ST8ZiZnnb+nAPANSmWcmZKuS/LlNkFK19fLeJBtPXCD6sDDKGhzDOMT47I9iD/CH4Cekea5tBaGcGmiSXMrdn0+oasB0tNM1HExOdaQ+pKgus2tVTBNzoJwRY3EElMnwXZhl2FuAY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BxHyn3OR; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="BxHyn3OR" Received: by smtp.kernel.org (Postfix) with ESMTPS id A7A79C4AF0E; Mon, 27 Oct 2025 18:55:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761591316; bh=g2mmajcxbCrl4r+56yYrwyyJINURxPSPFab71xwisCM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=BxHyn3OR+qtZyHbFPG2LPFJW9DYFlteEyAvD33ZrPuyJKJqgHPgfdpqjBiNWj1mq9 CiKEqqxHKSU/Vd09PapNkGCVf5Jl97GfSJjGeBgBwQO3Ingblm4KN6cVopQyYRgO4W JESBpQnkNMqwB66EF0Hei1M2XLBcQz6j4T+r3xbc4jaXlbjsX+y2BaZ+/VXwhTyTvJ BwzhvfHjVi+5HhLvJVaKKcecVM3Xqm6l+yLTZq1ZL4lkGiRR/FmM6kcHgXU5o2iZ6h 7oQ+XJfF5D01Ta+qvXmxBHc4n3uZYv0x/R7nYjmfUWzubdgYb1X1Z8ZnU3WIJL6FI/ mN0Xbm9x7WR7g== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C6F3CCF9EF; Mon, 27 Oct 2025 18:55:16 +0000 (UTC) From: Aaron Kling via B4 Relay Date: Mon, 27 Oct 2025 13:55:18 -0500 Subject: [PATCH v4 4/5] memory: tegra186: Support icc scaling Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251027-tegra186-icc-p2-v4-4-e4e4f57e2103@gmail.com> References: <20251027-tegra186-icc-p2-v4-0-e4e4f57e2103@gmail.com> In-Reply-To: <20251027-tegra186-icc-p2-v4-0-e4e4f57e2103@gmail.com> To: Krzysztof Kozlowski , Rob Herring , Conor Dooley , Thierry Reding , Jonathan Hunter Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, Aaron Kling X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1761591315; l=2383; i=webgeek1234@gmail.com; s=20250217; h=from:subject:message-id; bh=a/aaiaGuHyMc5nlB9Xe5+rxhKDOKwn8mtxYy/DM7ELQ=; b=sTiZwi1CKAAV0SWUPFee8cPPc6/4LR4iIF4TCTBWzREoSjQSVh+iuY/5/P5da1ERPlGnM+Olh Gi6l1d3fHY0BANgm5dmTyL1R19RlZTrjC2pCDMtEzMTIOJP0WO3mSg0 X-Developer-Key: i=webgeek1234@gmail.com; a=ed25519; pk=TQwd6q26txw7bkK7B8qtI/kcAohZc7bHHGSD7domdrU= X-Endpoint-Received: by B4 Relay for webgeek1234@gmail.com/20250217 with auth_id=342 X-Original-From: Aaron Kling Reply-To: webgeek1234@gmail.com From: Aaron Kling Add Interconnect framework support to dynamically set the DRAM bandwidth from different clients. The MC driver is added as an ICC provider and the EMC driver is already a provider. Signed-off-by: Aaron Kling --- drivers/memory/tegra/tegra186.c | 48 +++++++++++++++++++++++++++++++++++++= ++++ 1 file changed, 48 insertions(+) diff --git a/drivers/memory/tegra/tegra186.c b/drivers/memory/tegra/tegra18= 6.c index aee11457bf8e032637d1772affb87da0cac68494..1384164f624af5d4aaccedc8444= 3d203ba3db2c6 100644 --- a/drivers/memory/tegra/tegra186.c +++ b/drivers/memory/tegra/tegra186.c @@ -899,9 +899,56 @@ static const struct tegra_mc_client tegra186_mc_client= s[] =3D { .security =3D 0x51c, }, }, + }, { + .id =3D TEGRA_ICC_MC_CPU_CLUSTER0, + .name =3D "sw_cluster0", + .type =3D TEGRA_ICC_NISO, + }, { + .id =3D TEGRA_ICC_MC_CPU_CLUSTER1, + .name =3D "sw_cluster1", + .type =3D TEGRA_ICC_NISO, }, }; =20 +static int tegra186_mc_icc_set(struct icc_node *src, struct icc_node *dst) +{ + /* TODO: program PTSA */ + return 0; +} + +static int tegra186_mc_icc_aggregate(struct icc_node *node, u32 tag, u32 a= vg_bw, + u32 peak_bw, u32 *agg_avg, u32 *agg_peak) +{ + struct icc_provider *p =3D node->provider; + struct tegra_mc *mc =3D icc_provider_to_tegra_mc(p); + + if (node->id =3D=3D TEGRA_ICC_MC_CPU_CLUSTER0 || + node->id =3D=3D TEGRA_ICC_MC_CPU_CLUSTER1) { + if (mc) + peak_bw =3D peak_bw * mc->num_channels; + } + + *agg_avg +=3D avg_bw; + *agg_peak =3D max(*agg_peak, peak_bw); + + return 0; +} + +static int tegra186_mc_icc_get_init_bw(struct icc_node *node, u32 *avg, u3= 2 *peak) +{ + *avg =3D 0; + *peak =3D 0; + + return 0; +} + +static const struct tegra_mc_icc_ops tegra186_mc_icc_ops =3D { + .xlate =3D tegra_mc_icc_xlate, + .aggregate =3D tegra186_mc_icc_aggregate, + .get_bw =3D tegra186_mc_icc_get_init_bw, + .set =3D tegra186_mc_icc_set, +}; + const struct tegra_mc_soc tegra186_mc_soc =3D { .num_clients =3D ARRAY_SIZE(tegra186_mc_clients), .clients =3D tegra186_mc_clients, @@ -912,6 +959,7 @@ const struct tegra_mc_soc tegra186_mc_soc =3D { MC_INT_SECERR_SEC | MC_INT_DECERR_VPR | MC_INT_SECURITY_VIOLATION | MC_INT_DECERR_EMEM, .ops =3D &tegra186_mc_ops, + .icc_ops =3D &tegra186_mc_icc_ops, .ch_intmask =3D 0x0000000f, .global_intstatus_channel_shift =3D 0, }; --=20 2.51.0