From patchwork Fri Jun 1 14:36:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 924042 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="vB4N5DZM"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40y6Nf72Gmz9ry1 for ; Sat, 2 Jun 2018 00:37:06 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.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=GL4lal1DAdu63Uz2919x3sRjxaQyXi3AFXsjOUEWeaY=; b=vB4N5DZM11CulO4ceILjdpRgIq lf9cy1cg9rKJDsCP/Rl0mJ0N67v1MDJFxkWUgykso4+9Trb6wvsEXA4vscjfLiYQD8onHG01XP3jz /Itv1X7kMWnsdWRq1BQP10YQXrN2y0At16IZLnxvljokuQli1afpMSTvhwmk1pT4heMp3f5SoYWD5 +YSFA/6Kce9WQ13JoWsh46fDp/UHb5uQsDF8liv3RDPHeoN2X6nGip69QqOwVge02quNcCBYCfyLG aTplEdrJqptlL09c7ZT6FC3KjfMw6u9AXyjoizK9yH40m4ugh2hsL+m6Vio5y48Dzay7JWX2uSkEr QIPNLrOA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fOlAl-0007c5-Ud; Fri, 01 Jun 2018 14:36:55 +0000 Received: from mail.bootlin.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fOlAK-0007OL-VC for linux-mtd@lists.infradead.org; Fri, 01 Jun 2018 14:36:31 +0000 Received: by mail.bootlin.com (Postfix, from userid 110) id 7558B20981; Fri, 1 Jun 2018 16:36:27 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.bootlin.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost.localdomain (AAubervilliers-681-1-125-111.w90-88.abo.wanadoo.fr [90.88.63.111]) by mail.bootlin.com (Postfix) with ESMTPSA id 7A476207F0; Fri, 1 Jun 2018 16:36:07 +0200 (CEST) From: Boris Brezillon To: David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , linux-mtd@lists.infradead.org, Mark Brown , linux-spi@vger.kernel.org Subject: [RFC PATCH 2/2] mtd: m25p80: Use the SPI mem direct API to possibly improve performances Date: Fri, 1 Jun 2018 16:36:03 +0200 Message-Id: <20180601143603.4047-3-boris.brezillon@bootlin.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180601143603.4047-1-boris.brezillon@bootlin.com> References: <20180601143603.4047-1-boris.brezillon@bootlin.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180601_073629_297660_B2D5D0FF X-CRM114-Status: GOOD ( 19.38 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [62.4.15.54 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Cyrille Pitchen , Vignesh R , Thomas Petazzoni MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Make use of the SPI mem direct mapping API. Signed-off-by: Boris Brezillon --- drivers/mtd/devices/m25p80.c | 149 ++++++++++++++++++++++++++----------------- 1 file changed, 89 insertions(+), 60 deletions(-) diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index 1dd5f0420b5a..285fc94118ae 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -31,6 +31,10 @@ struct m25p { struct spi_mem *spimem; struct spi_nor spi_nor; + struct { + struct spi_mem_dirmap_desc *write; + struct spi_mem_dirmap_desc *read; + } dirmap; }; static int m25p80_read_reg(struct spi_nor *nor, u8 code, u8 *val, int len) @@ -65,38 +69,8 @@ static ssize_t m25p80_write(struct spi_nor *nor, loff_t to, size_t len, const u_char *buf) { struct m25p *flash = nor->priv; - struct spi_mem_op op = - SPI_MEM_OP(SPI_MEM_OP_CMD(nor->program_opcode, 1), - SPI_MEM_OP_ADDR(nor->addr_width, to, 1), - SPI_MEM_OP_NO_DUMMY, - SPI_MEM_OP_DATA_OUT(len, buf, 1)); - size_t remaining = len; - int ret; - - /* get transfer protocols. */ - op.cmd.buswidth = spi_nor_get_protocol_inst_nbits(nor->write_proto); - op.addr.buswidth = spi_nor_get_protocol_addr_nbits(nor->write_proto); - op.data.buswidth = spi_nor_get_protocol_data_nbits(nor->write_proto); - - if (nor->program_opcode == SPINOR_OP_AAI_WP && nor->sst_write_second) - op.addr.nbytes = 0; - - while (remaining) { - op.data.nbytes = remaining < UINT_MAX ? remaining : UINT_MAX; - ret = spi_mem_adjust_op_size(flash->spimem, &op); - if (ret) - return ret; - ret = spi_mem_exec_op(flash->spimem, &op); - if (ret) - return ret; - - op.addr.val += op.data.nbytes; - remaining -= op.data.nbytes; - op.data.buf.out += op.data.nbytes; - } - - return len; + return spi_mem_dirmap_write(flash->dirmap.write, to, len, buf); } /* @@ -107,39 +81,66 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len, u_char *buf) { struct m25p *flash = nor->priv; - struct spi_mem_op op = - SPI_MEM_OP(SPI_MEM_OP_CMD(nor->read_opcode, 1), - SPI_MEM_OP_ADDR(nor->addr_width, from, 1), - SPI_MEM_OP_DUMMY(nor->read_dummy, 1), - SPI_MEM_OP_DATA_IN(len, buf, 1)); - size_t remaining = len; - int ret; + + return spi_mem_dirmap_read(flash->dirmap.read, from, len, buf); +} + +static int m25p_create_write_dirmap(struct m25p *flash) +{ + struct spi_nor *nor = &flash->spi_nor; + struct spi_mem_dirmap_info info = { + .op_tmpl = SPI_MEM_OP(SPI_MEM_OP_CMD(nor->program_opcode, 1), + SPI_MEM_OP_ADDR(nor->addr_width, 0, 1), + SPI_MEM_OP_NO_DUMMY, + SPI_MEM_OP_DATA_OUT(0, NULL, 1)), + .offset = 0, + .length = flash->spi_nor.mtd.size, + }; + struct spi_mem_op *op = &info.op_tmpl; /* get transfer protocols. */ - op.cmd.buswidth = spi_nor_get_protocol_inst_nbits(nor->read_proto); - op.addr.buswidth = spi_nor_get_protocol_addr_nbits(nor->read_proto); - op.dummy.buswidth = op.addr.buswidth; - op.data.buswidth = spi_nor_get_protocol_data_nbits(nor->read_proto); + op->cmd.buswidth = spi_nor_get_protocol_inst_nbits(nor->write_proto); + op->addr.buswidth = spi_nor_get_protocol_addr_nbits(nor->write_proto); + op->dummy.buswidth = op->addr.buswidth; + op->data.buswidth = spi_nor_get_protocol_data_nbits(nor->write_proto); - /* convert the dummy cycles to the number of bytes */ - op.dummy.nbytes = (nor->read_dummy * op.dummy.buswidth) / 8; + if (nor->program_opcode == SPINOR_OP_AAI_WP && nor->sst_write_second) + op->addr.nbytes = 0; - while (remaining) { - op.data.nbytes = remaining < UINT_MAX ? remaining : UINT_MAX; - ret = spi_mem_adjust_op_size(flash->spimem, &op); - if (ret) - return ret; + flash->dirmap.write = spi_mem_dirmap_create(flash->spimem, &info); + if (IS_ERR(flash->dirmap.write)) + return PTR_ERR(flash->dirmap.write); - ret = spi_mem_exec_op(flash->spimem, &op); - if (ret) - return ret; + return 0; +} - op.addr.val += op.data.nbytes; - remaining -= op.data.nbytes; - op.data.buf.in += op.data.nbytes; - } +static int m25p_create_read_dirmap(struct m25p *flash) +{ + struct spi_nor *nor = &flash->spi_nor; + struct spi_mem_dirmap_info info = { + .op_tmpl = SPI_MEM_OP(SPI_MEM_OP_CMD(nor->read_opcode, 1), + SPI_MEM_OP_ADDR(nor->addr_width, 0, 1), + SPI_MEM_OP_DUMMY(nor->read_dummy, 1), + SPI_MEM_OP_DATA_IN(0, NULL, 1)), + .offset = 0, + .length = flash->spi_nor.mtd.size, + }; + struct spi_mem_op *op = &info.op_tmpl; - return len; + /* get transfer protocols. */ + op->cmd.buswidth = spi_nor_get_protocol_inst_nbits(nor->read_proto); + op->addr.buswidth = spi_nor_get_protocol_addr_nbits(nor->read_proto); + op->dummy.buswidth = op->addr.buswidth; + op->data.buswidth = spi_nor_get_protocol_data_nbits(nor->read_proto); + + /* convert the dummy cycles to the number of bytes */ + op->dummy.nbytes = (nor->read_dummy * op->dummy.buswidth) / 8; + + flash->dirmap.read = spi_mem_dirmap_create(flash->spimem, &info); + if (IS_ERR(flash->dirmap.read)) + return PTR_ERR(flash->dirmap.read); + + return 0; } /* @@ -215,19 +216,47 @@ static int m25p_probe(struct spi_mem *spimem) if (ret) return ret; - return mtd_device_register(&nor->mtd, data ? data->parts : NULL, - data ? data->nr_parts : 0); + ret = m25p_create_write_dirmap(flash); + if (ret) + return ret; + + ret = m25p_create_read_dirmap(flash); + if (ret) + goto err_destroy_write_dirmap; + + ret = mtd_device_register(&nor->mtd, data ? data->parts : NULL, + data ? data->nr_parts : 0); + if (ret) + goto err_destroy_read_dirmap; + + return 0; + +err_destroy_read_dirmap: + spi_mem_dirmap_destroy(flash->dirmap.read); + +err_destroy_write_dirmap: + spi_mem_dirmap_destroy(flash->dirmap.write); + + return ret; } static int m25p_remove(struct spi_mem *spimem) { struct m25p *flash = spi_mem_get_drvdata(spimem); + int ret; spi_nor_restore(&flash->spi_nor); /* Clean up MTD stuff. */ - return mtd_device_unregister(&flash->spi_nor.mtd); + ret = mtd_device_unregister(&flash->spi_nor.mtd); + if (ret) + return ret; + + spi_mem_dirmap_destroy(flash->dirmap.read); + spi_mem_dirmap_destroy(flash->dirmap.write); + + return 0; } static void m25p_shutdown(struct spi_mem *spimem)