From patchwork Tue Jan 4 08:36:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 530440 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 91E1CC433F5 for ; Tue, 4 Jan 2022 08:36:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233951AbiADIgu (ORCPT ); Tue, 4 Jan 2022 03:36:50 -0500 Received: from relay5-d.mail.gandi.net ([217.70.183.197]:59139 "EHLO relay5-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229677AbiADIgt (ORCPT ); Tue, 4 Jan 2022 03:36:49 -0500 Received: (Authenticated sender: miquel.raynal@bootlin.com) by relay5-d.mail.gandi.net (Postfix) with ESMTPSA id 561E81C000D; Tue, 4 Jan 2022 08:36:47 +0000 (UTC) From: Miquel Raynal To: Richard Weinberger , Vignesh Raghavendra , Tudor Ambarus , Pratyush Yadav , Michael Walle , , Mark Brown , Cc: Julien Su , Jaime Liao , Thomas Petazzoni , Boris Brezillon , Xiangsheng Hou , Miquel Raynal Subject: [PATCH v9 08/13] mtd: spinand: Create direct mapping descriptors for ECC operations Date: Tue, 4 Jan 2022 09:36:26 +0100 Message-Id: <20220104083631.40776-9-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220104083631.40776-1-miquel.raynal@bootlin.com> References: <20220104083631.40776-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org In order for pipelined ECC engines to be able to enable/disable the ECC engine only when needed and avoid races when future parallel-operations will be supported, we need to provide the information about the use of the ECC engine in the direct mapping hooks. As direct mapping configurations are meant to be static, it is best to create two new mappings: one for regular 'raw' accesses and one for accesses involving correction. It is up to the driver to use or not the new ECC enable boolean contained in the spi-mem operation. As dirmaps are not free (they consume a few pages of MMIO address space) and because these extra entries are only meant to be used by pipelined engines, let's limit their use to this specific type of engine and save a bit of memory with all the other setups. Signed-off-by: Miquel Raynal --- drivers/mtd/nand/spi/core.c | 35 +++++++++++++++++++++++++++++++++-- include/linux/mtd/spinand.h | 2 ++ 2 files changed, 35 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c index 715cad26fdef..8cbbc320f004 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -381,7 +381,10 @@ static int spinand_read_from_cache_op(struct spinand_device *spinand, } } - rdesc = spinand->dirmaps[req->pos.plane].rdesc; + if (req->mode == MTD_OPS_RAW) + rdesc = spinand->dirmaps[req->pos.plane].rdesc; + else + rdesc = spinand->dirmaps[req->pos.plane].rdesc_ecc; while (nbytes) { ret = spi_mem_dirmap_read(rdesc, column, nbytes, buf); @@ -452,7 +455,10 @@ static int spinand_write_to_cache_op(struct spinand_device *spinand, req->ooblen); } - wdesc = spinand->dirmaps[req->pos.plane].wdesc; + if (req->mode == MTD_OPS_RAW) + wdesc = spinand->dirmaps[req->pos.plane].wdesc; + else + wdesc = spinand->dirmaps[req->pos.plane].wdesc_ecc; while (nbytes) { ret = spi_mem_dirmap_write(wdesc, column, nbytes, buf); @@ -866,6 +872,31 @@ static int spinand_create_dirmap(struct spinand_device *spinand, spinand->dirmaps[plane].rdesc = desc; + if (nand->ecc.engine->integration != NAND_ECC_ENGINE_INTEGRATION_PIPELINED) { + spinand->dirmaps[plane].wdesc_ecc = spinand->dirmaps[plane].wdesc; + spinand->dirmaps[plane].rdesc_ecc = spinand->dirmaps[plane].rdesc; + + return 0; + } + + info.op_tmpl = *spinand->op_templates.update_cache; + info.op_tmpl.data.ecc = true; + desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev, + spinand->spimem, &info); + if (IS_ERR(desc)) + return PTR_ERR(desc); + + spinand->dirmaps[plane].wdesc_ecc = desc; + + info.op_tmpl = *spinand->op_templates.read_cache; + info.op_tmpl.data.ecc = true; + desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev, + spinand->spimem, &info); + if (IS_ERR(desc)) + return PTR_ERR(desc); + + spinand->dirmaps[plane].rdesc_ecc = desc; + return 0; } diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h index 6988956b8492..3aa28240a77f 100644 --- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -389,6 +389,8 @@ struct spinand_info { struct spinand_dirmap { struct spi_mem_dirmap_desc *wdesc; struct spi_mem_dirmap_desc *rdesc; + struct spi_mem_dirmap_desc *wdesc_ecc; + struct spi_mem_dirmap_desc *rdesc_ecc; }; /**