From patchwork Wed Aug 26 09:25:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Diana Madalina Craciun X-Patchwork-Id: 11737667 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DE9BF722 for ; Wed, 26 Aug 2020 09:29:13 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B3F6120786 for ; Wed, 26 Aug 2020 09:29:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="22G2jMuA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B3F6120786 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oss.nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:To: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=VXFRbn4RjHdZohB3NqgikhODWy2DMeCEK/TILMT8Ecw=; b=22G2jMuAHGm4LaUaoQR0w9q3Ht ls2H2cIh2L7UDr+EsK6Oi2SKLTverEUrFV972IqU1hQMmz4WLeZnuZE6N4Wv5Xx0Vm1r6IZFNLVjH 1yg04JdtI3+3tDsZY1WkENypm5vNjvDBUvLSyO4UuHTMQjKj6bf0HrMrT36MQhpWiij/uDXNsM4o2 pUYF1KTN2nWQyZGcIHATBCSVViMbIpmLzhImhO+4IUJNWK3+czsIan4l8Cw/t7b4efh+2bfMwuuuP PHKaZagFJaoYPxOnHqnuYUQxQ2fVuVOs5169SFqr0jk/o6IJFTmPBtUGu3v4XH29nf0g3d7PmtAEf 8HqW6fPw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kAriO-0005nY-Ke; Wed, 26 Aug 2020 09:27:32 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kArh5-0005Jb-1e for linux-arm-kernel@lists.infradead.org; Wed, 26 Aug 2020 09:26:14 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id AC9511A08FF; Wed, 26 Aug 2020 11:26:07 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 95B201A08B7; Wed, 26 Aug 2020 11:26:07 +0200 (CEST) Received: from fsr-ub1864-111.ea.freescale.net (fsr-ub1864-111.ea.freescale.net [10.171.82.141]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 41B0C202CA; Wed, 26 Aug 2020 11:26:07 +0200 (CEST) From: Diana Craciun To: linux-kernel@vger.kernel.org, laurentiu.tudor@nxp.com Subject: [PATCH v4 13/13] bus/fsl-mc: Add a new version for dprc_get_obj_region command Date: Wed, 26 Aug 2020 12:25:27 +0300 Message-Id: <20200826092527.4992-14-diana.craciun@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200826092527.4992-1-diana.craciun@oss.nxp.com> References: <20200826092527.4992-1-diana.craciun@oss.nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200826_052611_466987_BA381D78 X-CRM114-Status: GOOD ( 16.82 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [92.121.34.13 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: stuyoder@gmail.com, gregkh@linuxfoundation.org, leoyang.li@nxp.com, bharatb.linux@gmail.com, Diana Craciun , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The region size reported by the firmware for mc and software portals was less than allocated by the hardware. This may be problematic when mmapping the region in user space because the region size is less than page size. However the size as reserved by the hardware is 64K. Signed-off-by: Diana Craciun --- drivers/bus/fsl-mc/dprc.c | 38 ++++++++++++++++++----------- drivers/bus/fsl-mc/fsl-mc-private.h | 3 +++ 2 files changed, 27 insertions(+), 14 deletions(-) diff --git a/drivers/bus/fsl-mc/dprc.c b/drivers/bus/fsl-mc/dprc.c index 650808799a29..57b097caf255 100644 --- a/drivers/bus/fsl-mc/dprc.c +++ b/drivers/bus/fsl-mc/dprc.c @@ -536,20 +536,30 @@ int dprc_get_obj_region(struct fsl_mc_io *mc_io, return err; } - /** - * MC API version 6.3 introduced a new field to the region - * descriptor: base_address. If the older API is in use then the base - * address is set to zero to indicate it needs to be obtained elsewhere - * (typically the device tree). - */ - if (dprc_major_ver > 6 || (dprc_major_ver == 6 && dprc_minor_ver >= 3)) - cmd.header = - mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG_V2, - cmd_flags, token); - else - cmd.header = - mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG, - cmd_flags, token); + if (dprc_major_ver > 6 || (dprc_major_ver == 6 && dprc_minor_ver >= 6)) { + /* + * MC API version 6.6 changed the size of the MC portals and software + * portals to 64K (as implemented by hardware). If older API is in use the + * size reported is less (64 bytes for mc portals and 4K for software + * portals). + */ + + cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG_V3, + cmd_flags, token); + + } else if (dprc_major_ver == 6 && dprc_minor_ver >= 3) { + /* + * MC API version 6.3 introduced a new field to the region + * descriptor: base_address. If the older API is in use then the base + * address is set to zero to indicate it needs to be obtained elsewhere + * (typically the device tree). + */ + cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG_V2, + cmd_flags, token); + } else { + cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG, + cmd_flags, token); + } cmd_params = (struct dprc_cmd_get_obj_region *)cmd.params; cmd_params->obj_id = cpu_to_le32(obj_id); diff --git a/drivers/bus/fsl-mc/fsl-mc-private.h b/drivers/bus/fsl-mc/fsl-mc-private.h index 3e9f9c778631..85ca5fdee581 100644 --- a/drivers/bus/fsl-mc/fsl-mc-private.h +++ b/drivers/bus/fsl-mc/fsl-mc-private.h @@ -80,10 +80,12 @@ int dpmcp_reset(struct fsl_mc_io *mc_io, /* DPRC command versioning */ #define DPRC_CMD_BASE_VERSION 1 #define DPRC_CMD_2ND_VERSION 2 +#define DPRC_CMD_3RD_VERSION 3 #define DPRC_CMD_ID_OFFSET 4 #define DPRC_CMD(id) (((id) << DPRC_CMD_ID_OFFSET) | DPRC_CMD_BASE_VERSION) #define DPRC_CMD_V2(id) (((id) << DPRC_CMD_ID_OFFSET) | DPRC_CMD_2ND_VERSION) +#define DPRC_CMD_V3(id) (((id) << DPRC_CMD_ID_OFFSET) | DPRC_CMD_3RD_VERSION) /* DPRC command IDs */ #define DPRC_CMDID_CLOSE DPRC_CMD(0x800) @@ -105,6 +107,7 @@ int dpmcp_reset(struct fsl_mc_io *mc_io, #define DPRC_CMDID_GET_OBJ DPRC_CMD(0x15A) #define DPRC_CMDID_GET_OBJ_REG DPRC_CMD(0x15E) #define DPRC_CMDID_GET_OBJ_REG_V2 DPRC_CMD_V2(0x15E) +#define DPRC_CMDID_GET_OBJ_REG_V3 DPRC_CMD_V3(0x15E) #define DPRC_CMDID_SET_OBJ_IRQ DPRC_CMD(0x15F) #define DPRC_CMDID_GET_CONNECTION DPRC_CMD(0x16C)