From nobody Wed Oct 8 21:10:56 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 D10FB28937A; Wed, 25 Jun 2025 09:42:43 +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=1750844565; cv=none; b=RNopOzIc9NJvjba5ue05tLAEIVJRKPyWoKcjLNJrf74Lq1Spcjup2G7IJ0SUzrqspGYaviGidFz3fXD+WVUN5HfB6CMgJde4hVCSMksrqKFi874t/Se/P4TvmpI+qaGYYHAVrA9FrmRY5IPJbu+uJPchrXNAKzhaAEn5NUxs7pU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750844565; c=relaxed/simple; bh=jCWWkrmEJfZ25so82ytPFoQiKJzvNYkyN981ikbuWHI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=sxFJufg90lq/Uxosmg44bfu0kBdGKA11SHNB3ti55PR12X8encOqkQhe7QaCknHqNsGX0hKaliDtcIX8ATetgvsXFg2PjGVuu2DgyHxsZfMePMw7d67Oz48nu6ivj1o+BtjhTTGRzQRTo++lfqiYOn8gQK8tVZNyUmLRnwO8b2w= 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=4kBe6+wL; 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="4kBe6+wL" 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 55P5xZ6p001836; Wed, 25 Jun 2025 11:42:34 +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=4kBe6+wLuPNsuRTX bCHsIQw9fZdAYzAbHZAF15wjuuHqcjF80d4oy5kfubbq0rGJFRR+PRMLgAbRO4S1 6RMR3OjIETsN3A+neEq+GHUA8te/kz8fM9suPESv0hy2BC763EDtCnHfSaEJRXnf qfYAQCuFqwX6sC4UX3smGlM2zqymWLXmN5Zk9uhl3R5MS8mhfXhRUXH0mEN/Pb4u 1xFojKNHbiF6b9I+TqjPhfxlF/rEyUT4PgWIFbnSkIKD72p94zyrpyRBecz9okf/ SA+Rn/0fdCJZJYi0e9ImlJ4c46reGGYowf2sy2dXZX8vek5+2zp1sAmPXWdd1+3h Ij2VUw== 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 47dhvbs042-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 25 Jun 2025 11:42:33 +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 788EE4002D; Wed, 25 Jun 2025 11:41:30 +0200 (CEST) Received: from Webmail-eu.st.com (eqndag1node6.st.com [10.75.129.135]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 3A35D6F5FFC; Wed, 25 Jun 2025 11:40:42 +0200 (CEST) Received: from SAFDAG1NODE1.st.com (10.75.90.17) by EQNDAG1NODE6.st.com (10.75.129.135) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Wed, 25 Jun 2025 11:40:42 +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; Wed, 25 Jun 2025 11:40:41 +0200 From: Arnaud Pouliquen To: Bjorn Andersson , Mathieu Poirier , Jens Wiklander , "Rob Herring" , Krzysztof Kozlowski , "Conor Dooley" CC: , , , , , , Arnaud Pouliquen Subject: [PATCH v19 1/6] remoteproc: core: Introduce rproc_pa_to_va helper Date: Wed, 25 Jun 2025 11:40:23 +0200 Message-ID: <20250625094028.758016-2-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250625094028.758016-1-arnaud.pouliquen@foss.st.com> References: <20250625094028.758016-1-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:6.1.7,FMLib:17.12.80.40 definitions=2025-06-25_02,2025-06-23_07,2025-03-28_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