From nobody Fri Oct 10 17:36:15 2025 Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) (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 3DE482C158B; Fri, 13 Jun 2025 09:19:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.207.212.93 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749806388; cv=none; b=LDLNbOWlS9CGWtKu2+QJ8M0yn5FMVb2LUsAeHD4ePAGzK8kV8bE8koCx5BmbA1EhVgd2DwhdazRAUr/MagLla41HwQ9s6ywk1hPkaQT5UVdE1RzrVfu9+T2t8IbR7o1QI/IlqA7KWqXrKBRW8RZ2e0S0BXKJAguyVAuWCqLCnbE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749806388; c=relaxed/simple; bh=jCWWkrmEJfZ25so82ytPFoQiKJzvNYkyN981ikbuWHI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=YrsfAcrIqmich5yKoNcuRl2fqHff9vMph9REnFQmd7cBHjmlco2SEUzpwJ+seDleawWuz9SyvFKRr/pCOIQyXfCjmTMNDmxBa/7rhmI8PU0zz01qjSb09sLLn9JOxQjeLQn3hBwfx/FKDq0/TgdQbEQcjzxVcjU4x20snrFcStQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com; spf=pass smtp.mailfrom=foss.st.com; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b=xmCVzlKQ; arc=none smtp.client-ip=91.207.212.93 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=foss.st.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b="xmCVzlKQ" Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 55D8wHNm020220; Fri, 13 Jun 2025 11:19:28 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=selector1; bh= Qukd4stYOCYEBe2KGcf2tpYpRWJZmwskg2vfqUfUsKY=; b=xmCVzlKQCtuGgHtz pUXCmVGQ3ONSiquNM8AvJbe2b/bd2r1R7FQVmDfjwI6Ztf/N52gp85Y3iOSOAnYc t+4L78ug3jzrEG0441Cs8UX4zGFErHHGupHayHwXXjmacQCRLOzX0OYroE6ImLUv WOdeCRhWKnajWFJasN7CCOYOu4nLybchNgNt8DnWqPWWxspQ61ErvQ4/j8V/7Gcr c7eZEkL7meNLk1I7QE7nGYAsdhpig1zoHCZiJJDfWzdy516k/04MfKmGcIcMs+Nv bQgcwFa1QXBntuBa+UI484nKk78R/Kd+yCqish+Gu/u8sBLN4xWYnQXsVoLqCvK0 uLj8lg== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 474ajakwn4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Jun 2025 11:19:27 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 38AE340056; Fri, 13 Jun 2025 11:18:08 +0200 (CEST) Received: from Webmail-eu.st.com (eqndag1node5.st.com [10.75.129.134]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 7B050BAD4D4; Fri, 13 Jun 2025 11:17:19 +0200 (CEST) Received: from SAFDAG1NODE1.st.com (10.75.90.17) by EQNDAG1NODE5.st.com (10.75.129.134) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Fri, 13 Jun 2025 11:17:19 +0200 Received: from localhost (10.48.86.121) by SAFDAG1NODE1.st.com (10.75.90.17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Fri, 13 Jun 2025 11:17:19 +0200 From: Arnaud Pouliquen To: Bjorn Andersson , Mathieu Poirier , Jens Wiklander , "Rob Herring" , Krzysztof Kozlowski , "Conor Dooley" CC: , , , , , , Arnaud Pouliquen Subject: [PATCH v17 1/6] remoteproc: core: Introduce rproc_pa_to_va helper Date: Fri, 13 Jun 2025 11:16:45 +0200 Message-ID: <20250613091650.2337411-2-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250613091650.2337411-1-arnaud.pouliquen@foss.st.com> References: <20250613091650.2337411-1-arnaud.pouliquen@foss.st.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: EQNCAS1NODE4.st.com (10.75.129.82) To SAFDAG1NODE1.st.com (10.75.90.17) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-06-12_10,2025-06-12_02,2025-03-28_01 Content-Type: text/plain; charset="utf-8" When a resource table is loaded by an external entity such as U-boot or OP-TEE, we do not necessarily get the device address(da) but the physical address(pa). This helper performs similar translation than the rproc_da_to_va() but based on a physical address. Signed-off-by: Arnaud Pouliquen --- drivers/remoteproc/remoteproc_core.c | 46 ++++++++++++++++++++++++++++ include/linux/remoteproc.h | 1 + 2 files changed, 47 insertions(+) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remo= teproc_core.c index 81b2ccf988e8..d06eef1fa424 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -230,6 +230,52 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, size= _t len, bool *is_iomem) } EXPORT_SYMBOL(rproc_da_to_va); =20 +/** + * rproc_pa_to_va() - lookup the kernel virtual address for a physical add= ress of a remoteproc + * memory + * + * @rproc: handle of a remote processor + * @pa: remoteproc physical address + * @len: length of the memory region @pa is pointing to + * @is_iomem: optional pointer filled in to indicate if @da is iomapped me= mory + * + * This function is a helper function similar to rproc_da_to_va() but it d= eals with physical + * addresses instead of device addresses. + * + * Return: a valid kernel address on success or NULL on failure + */ +void *rproc_pa_to_va(struct rproc *rproc, phys_addr_t pa, size_t len, bool= *is_iomem) +{ + struct rproc_mem_entry *carveout; + void *ptr =3D NULL; + + list_for_each_entry(carveout, &rproc->carveouts, node) { + int offset =3D pa - carveout->dma; + + /* Verify that carveout is allocated */ + if (!carveout->va) + continue; + + /* try next carveout if da is too small */ + if (offset < 0) + continue; + + /* try next carveout if da is too large */ + if (offset + len > carveout->len) + continue; + + ptr =3D carveout->va + offset; + + if (is_iomem) + *is_iomem =3D carveout->is_iomem; + + break; + } + + return ptr; +} +EXPORT_SYMBOL(rproc_pa_to_va); + /** * rproc_find_carveout_by_name() - lookup the carveout region by a name * @rproc: handle of a remote processor diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index b4795698d8c2..8fd0d7f63c8e 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -690,6 +690,7 @@ int rproc_detach(struct rproc *rproc); int rproc_set_firmware(struct rproc *rproc, const char *fw_name); void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type); void *rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iom= em); +void *rproc_pa_to_va(struct rproc *rproc, phys_addr_t pa, size_t len, bool= *is_iomem); =20 /* from remoteproc_coredump.c */ void rproc_coredump_cleanup(struct rproc *rproc); --=20 2.25.1