From nobody Wed Dec 17 14:01:16 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 87F86C4167B for ; Mon, 27 Nov 2023 14:19:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233828AbjK0OTh (ORCPT ); Mon, 27 Nov 2023 09:19:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233724AbjK0OSu (ORCPT ); Mon, 27 Nov 2023 09:18:50 -0500 Received: from mail-lj1-x230.google.com (mail-lj1-x230.google.com [IPv6:2a00:1450:4864:20::230]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0B4A1BE for ; Mon, 27 Nov 2023 06:16:23 -0800 (PST) Received: by mail-lj1-x230.google.com with SMTP id 38308e7fff4ca-2c5087d19a6so47811091fa.0 for ; Mon, 27 Nov 2023 06:16:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1701094582; x=1701699382; darn=vger.kernel.org; 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=W4078kP/f/V2Gky4lpqf6UFEH3ZYOdfKZS8n60prFLY=; b=jdZ81SkaC5KVs7bwwsbFKYeLWbgFnt/7HZohssiswHO49OQkR2PWdYwrur5MEfnhSm s6YV+Nu2iJgtwyuYb2Vv74Mtv9RlX7YTuijXkuq1DZLHOw3AreUkFOZ5IXUNXdks7H8v MjJIZj5A8izlj6bXCcGznCtwFMB9clmIjxZn8AAYPdE8fxljsmaqLA1D3Uw0fzCGGn4I R3CU1Wcu6SnxmpVgtv1OmuE5/PT5VDIrisOrZ4k5h3LrlGmj76GoUoRpTSW55OJZljJ/ dISIdONNqc4+P22/+DNrspb7gIQEms/2SWXhkW/JGmc7IFTjGYj7iDTOqjAm+ohZG4+h RW5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701094582; x=1701699382; 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=W4078kP/f/V2Gky4lpqf6UFEH3ZYOdfKZS8n60prFLY=; b=fXgf9/LQ7p7esEl42z2pUzz3ljrwYzcBBMRRTxzExW+QAGAjBUKrwAcd6lCf+SEfuN qEbAtNOqdjTOZBeLVlZG6OALOyewbz1mY77meN45uxJy0oSBIN7SG1T/0aIP0DQmIaJI K1fW2nCnpWBVZA2k/GgbHwochuChzfwW0cnYqn0dx07RwApRpm9+YpBfLqvldR7/5DMI 3b9M7HMUhrSArgzoqcd2nSmOcbcz0sT6B3U8zGOCn55IkNZkC7qV4qmTjKcaJn8pt86O mn9cX00lcFOi0W8jylJ+HZp4ErgGCYpBoN+vGCjUwQC9q4vt222Klfqob7ShfnyxlAuL Tgbw== X-Gm-Message-State: AOJu0YwIzvCsrFEav417HANG10tixor7i+MFgBEWD8drX4j/72al7u/V AKl+NAT2IwgqCG1bbsDG6gTagw== X-Google-Smtp-Source: AGHT+IF7kvO8X4eOkspE0GqfGCCgZHim4OOCuXV37SApn3RrE1w/XnxV1AHmL/UE2FyPm/i4XpHryg== X-Received: by 2002:a05:651c:3d1:b0:2c9:a274:a511 with SMTP id f17-20020a05651c03d100b002c9a274a511mr2410154ljp.43.1701094581791; Mon, 27 Nov 2023 06:16:21 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:bf33:77c7:8131:5e64]) by smtp.gmail.com with ESMTPSA id be7-20020a05600c1e8700b00405442edc69sm14658830wmb.14.2023.11.27.06.16.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 06:16:21 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [PATCH v6 10/13] firmware: qcom: scm: add support for SHM bridge operations Date: Mon, 27 Nov 2023 15:15:57 +0100 Message-Id: <20231127141600.20929-11-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231127141600.20929-1-brgl@bgdev.pl> References: <20231127141600.20929-1-brgl@bgdev.pl> 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" From: Bartosz Golaszewski Add low-level primitives for enabling SHM bridge support as well as creating and destroying SHM bridge pools to qcom-scm. Signed-off-by: Bartosz Golaszewski Acked-by: Andrew Halaney Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-= x13s --- drivers/firmware/qcom/qcom_scm.c | 60 ++++++++++++++++++++++++++ drivers/firmware/qcom/qcom_scm.h | 3 ++ include/linux/firmware/qcom/qcom_scm.h | 6 +++ 3 files changed, 69 insertions(+) diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_= scm.c index 318d7d398e5f..839773270a21 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -1323,6 +1323,66 @@ bool qcom_scm_lmh_dcvsh_available(void) } EXPORT_SYMBOL_GPL(qcom_scm_lmh_dcvsh_available); =20 +int qcom_scm_shm_bridge_enable(void) +{ + struct qcom_scm_desc desc =3D { + .svc =3D QCOM_SCM_SVC_MP, + .cmd =3D QCOM_SCM_MP_SHM_BRIDGE_ENABLE, + .owner =3D ARM_SMCCC_OWNER_SIP + }; + + struct qcom_scm_res res; + + if (!__qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_MP, + QCOM_SCM_MP_SHM_BRIDGE_ENABLE)) + return -EOPNOTSUPP; + + return qcom_scm_call(__scm->dev, &desc, &res) ?: res.result[0]; +} +EXPORT_SYMBOL_GPL(qcom_scm_shm_bridge_enable); + +int qcom_scm_shm_bridge_create(struct device *dev, u64 pfn_and_ns_perm_fla= gs, + u64 ipfn_and_s_perm_flags, u64 size_and_flags, + u64 ns_vmids, u64 *handle) +{ + struct qcom_scm_desc desc =3D { + .svc =3D QCOM_SCM_SVC_MP, + .cmd =3D QCOM_SCM_MP_SHM_BRIDGE_CREATE, + .owner =3D ARM_SMCCC_OWNER_SIP, + .args[0] =3D pfn_and_ns_perm_flags, + .args[1] =3D ipfn_and_s_perm_flags, + .args[2] =3D size_and_flags, + .args[3] =3D ns_vmids, + .arginfo =3D QCOM_SCM_ARGS(4, QCOM_SCM_VAL, QCOM_SCM_VAL, + QCOM_SCM_VAL, QCOM_SCM_VAL), + }; + + struct qcom_scm_res res; + int ret; + + ret =3D qcom_scm_call(__scm->dev, &desc, &res); + + if (handle && !ret) + *handle =3D res.result[1]; + + return ret ?: res.result[0]; +} +EXPORT_SYMBOL_GPL(qcom_scm_shm_bridge_create); + +int qcom_scm_shm_bridge_delete(struct device *dev, u64 handle) +{ + struct qcom_scm_desc desc =3D { + .svc =3D QCOM_SCM_SVC_MP, + .cmd =3D QCOM_SCM_MP_SHM_BRIDGE_DELETE, + .owner =3D ARM_SMCCC_OWNER_SIP, + .args[0] =3D handle, + .arginfo =3D QCOM_SCM_ARGS(1, QCOM_SCM_VAL), + }; + + return qcom_scm_call(__scm->dev, &desc, NULL); +} +EXPORT_SYMBOL_GPL(qcom_scm_shm_bridge_delete); + int qcom_scm_lmh_profile_change(u32 profile_id) { struct qcom_scm_desc desc =3D { diff --git a/drivers/firmware/qcom/qcom_scm.h b/drivers/firmware/qcom/qcom_= scm.h index aa7d06939f8e..cb7273aa0a5e 100644 --- a/drivers/firmware/qcom/qcom_scm.h +++ b/drivers/firmware/qcom/qcom_scm.h @@ -116,6 +116,9 @@ struct qcom_tzmem_pool *qcom_scm_get_tzmem_pool(void); #define QCOM_SCM_MP_IOMMU_SET_CP_POOL_SIZE 0x05 #define QCOM_SCM_MP_VIDEO_VAR 0x08 #define QCOM_SCM_MP_ASSIGN 0x16 +#define QCOM_SCM_MP_SHM_BRIDGE_ENABLE 0x1c +#define QCOM_SCM_MP_SHM_BRIDGE_DELETE 0x1d +#define QCOM_SCM_MP_SHM_BRIDGE_CREATE 0x1e =20 #define QCOM_SCM_SVC_OCMEM 0x0f #define QCOM_SCM_OCMEM_LOCK_CMD 0x01 diff --git a/include/linux/firmware/qcom/qcom_scm.h b/include/linux/firmwar= e/qcom/qcom_scm.h index ccaf28846054..9b6054813f59 100644 --- a/include/linux/firmware/qcom/qcom_scm.h +++ b/include/linux/firmware/qcom/qcom_scm.h @@ -115,6 +115,12 @@ int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_reg= , u32 payload_val, int qcom_scm_lmh_profile_change(u32 profile_id); bool qcom_scm_lmh_dcvsh_available(void); =20 +int qcom_scm_shm_bridge_enable(void); +int qcom_scm_shm_bridge_create(struct device *dev, u64 pfn_and_ns_perm_fla= gs, + u64 ipfn_and_s_perm_flags, u64 size_and_flags, + u64 ns_vmids, u64 *handle); +int qcom_scm_shm_bridge_delete(struct device *dev, u64 handle); + #ifdef CONFIG_QCOM_QSEECOM =20 int qcom_scm_qseecom_app_get_id(const char *app_name, u32 *app_id); --=20 2.40.1