From patchwork Sat May 7 19:14:59 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Per Forlin X-Patchwork-Id: 1407 Return-Path: Delivered-To: unknown Received: from imap.gmail.com (74.125.159.109) by localhost6.localdomain6 with IMAP4-SSL; 08 Jun 2011 14:51:44 -0000 Delivered-To: patches@linaro.org Received: by 10.224.184.145 with SMTP id ck17cs13862qab; Sat, 7 May 2011 12:16:02 -0700 (PDT) Received: by 10.213.99.70 with SMTP id t6mr159685ebn.134.1304795761704; Sat, 07 May 2011 12:16:01 -0700 (PDT) Received: from mail-ey0-f178.google.com (mail-ey0-f178.google.com [209.85.215.178]) by mx.google.com with ESMTPS id 41si9717568eef.69.2011.05.07.12.15.59 (version=TLSv1/SSLv3 cipher=OTHER); Sat, 07 May 2011 12:16:00 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.215.178 is neither permitted nor denied by best guess record for domain of per.forlin@linaro.org) client-ip=209.85.215.178; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.215.178 is neither permitted nor denied by best guess record for domain of per.forlin@linaro.org) smtp.mail=per.forlin@linaro.org Received: by eya25 with SMTP id 25so1406860eya.37 for ; Sat, 07 May 2011 12:15:59 -0700 (PDT) Received: by 10.14.44.76 with SMTP id m52mr2491620eeb.72.1304795758462; Sat, 07 May 2011 12:15:58 -0700 (PDT) Received: from localhost.localdomain (c-3c7b71d5.029-82-6c756e10.cust.bredbandsbolaget.se [213.113.123.60]) by mx.google.com with ESMTPS id s62sm2260327eea.24.2011.05.07.12.15.41 (version=TLSv1/SSLv3 cipher=OTHER); Sat, 07 May 2011 12:15:57 -0700 (PDT) From: Per Forlin To: linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linaro-dev@lists.linaro.org Cc: Chris Ball , Per Forlin Subject: [PATCH v3 05/12] mmc: add a block request prepare function Date: Sat, 7 May 2011 21:14:59 +0200 Message-Id: <1304795706-27308-6-git-send-email-per.forlin@linaro.org> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1304795706-27308-1-git-send-email-per.forlin@linaro.org> References: <1304795706-27308-1-git-send-email-per.forlin@linaro.org> Break out code from mmc_blk_issue_rw_rq to create a block request prepare function. This doesn't change any functionallity. This helps when handling more than one active block request. Signed-off-by: Per Forlin --- drivers/mmc/card/block.c | 170 ++++++++++++++++++++++++--------------------- 1 files changed, 91 insertions(+), 79 deletions(-) diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index ec4e432..e606dec 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -324,97 +324,109 @@ out: return err ? 0 : 1; } -static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) +static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, + struct mmc_card *card, + int disable_multi, + struct mmc_queue *mq) { - struct mmc_blk_data *md = mq->data; - struct mmc_card *card = md->queue.card; - struct mmc_blk_request *brq = &mq->mqrq_cur->brq; - int ret = 1, disable_multi = 0; + u32 readcmd, writecmd; + struct mmc_blk_request *brq = &mqrq->brq; + struct request *req = mqrq->req; - mmc_claim_host(card->host); + memset(brq, 0, sizeof(struct mmc_blk_request)); - do { - struct mmc_command cmd; - u32 readcmd, writecmd, status = 0; - - memset(brq, 0, sizeof(struct mmc_blk_request)); - brq->mrq.cmd = &brq->cmd; - brq->mrq.data = &brq->data; - - brq->cmd.arg = blk_rq_pos(req); - if (!mmc_card_blockaddr(card)) - brq->cmd.arg <<= 9; - brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; - brq->data.blksz = 512; - brq->stop.opcode = MMC_STOP_TRANSMISSION; - brq->stop.arg = 0; - brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; - brq->data.blocks = blk_rq_sectors(req); + brq->mrq.cmd = &brq->cmd; + brq->mrq.data = &brq->data; - /* - * The block layer doesn't support all sector count - * restrictions, so we need to be prepared for too big - * requests. - */ - if (brq->data.blocks > card->host->max_blk_count) - brq->data.blocks = card->host->max_blk_count; + brq->cmd.arg = blk_rq_pos(req); + if (!mmc_card_blockaddr(card)) + brq->cmd.arg <<= 9; + brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; + brq->data.blksz = 512; + brq->stop.opcode = MMC_STOP_TRANSMISSION; + brq->stop.arg = 0; + brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; + brq->data.blocks = blk_rq_sectors(req); - /* - * After a read error, we redo the request one sector at a time - * in order to accurately determine which sectors can be read - * successfully. + /* + * The block layer doesn't support all sector count + * restrictions, so we need to be prepared for too big + * requests. + */ + if (brq->data.blocks > card->host->max_blk_count) + brq->data.blocks = card->host->max_blk_count; + + /* + * After a read error, we redo the request one sector at a time + * in order to accurately determine which sectors can be read + * successfully. + */ + if (disable_multi && brq->data.blocks > 1) + brq->data.blocks = 1; + + if (brq->data.blocks > 1) { + /* SPI multiblock writes terminate using a special + * token, not a STOP_TRANSMISSION request. */ - if (disable_multi && brq->data.blocks > 1) - brq->data.blocks = 1; - - if (brq->data.blocks > 1) { - /* SPI multiblock writes terminate using a special - * token, not a STOP_TRANSMISSION request. - */ - if (!mmc_host_is_spi(card->host) - || rq_data_dir(req) == READ) - brq->mrq.stop = &brq->stop; - readcmd = MMC_READ_MULTIPLE_BLOCK; - writecmd = MMC_WRITE_MULTIPLE_BLOCK; - } else { - brq->mrq.stop = NULL; - readcmd = MMC_READ_SINGLE_BLOCK; - writecmd = MMC_WRITE_BLOCK; - } - if (rq_data_dir(req) == READ) { - brq->cmd.opcode = readcmd; - brq->data.flags |= MMC_DATA_READ; - } else { - brq->cmd.opcode = writecmd; - brq->data.flags |= MMC_DATA_WRITE; - } + if (!mmc_host_is_spi(card->host) + || rq_data_dir(req) == READ) + brq->mrq.stop = &brq->stop; + readcmd = MMC_READ_MULTIPLE_BLOCK; + writecmd = MMC_WRITE_MULTIPLE_BLOCK; + } else { + brq->mrq.stop = NULL; + readcmd = MMC_READ_SINGLE_BLOCK; + writecmd = MMC_WRITE_BLOCK; + } + if (rq_data_dir(req) == READ) { + brq->cmd.opcode = readcmd; + brq->data.flags |= MMC_DATA_READ; + } else { + brq->cmd.opcode = writecmd; + brq->data.flags |= MMC_DATA_WRITE; + } - mmc_set_data_timeout(&brq->data, card); + mmc_set_data_timeout(&brq->data, card); - brq->data.sg = mq->mqrq_cur->sg; - brq->data.sg_len = mmc_queue_map_sg(mq, mq->mqrq_cur); + brq->data.sg = mqrq->sg; + brq->data.sg_len = mmc_queue_map_sg(mq, mqrq); - /* - * Adjust the sg list so it is the same size as the - * request. - */ - if (brq->data.blocks != blk_rq_sectors(req)) { - int i, data_size = brq->data.blocks << 9; - struct scatterlist *sg; - - for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) { - data_size -= sg->length; - if (data_size <= 0) { - sg->length += data_size; - i++; - break; - } + /* + * Adjust the sg list so it is the same size as the + * request. + */ + if (brq->data.blocks != blk_rq_sectors(req)) { + int i, data_size = brq->data.blocks << 9; + struct scatterlist *sg; + + for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) { + data_size -= sg->length; + if (data_size <= 0) { + sg->length += data_size; + i++; + break; } - brq->data.sg_len = i; } + brq->data.sg_len = i; + } - mmc_queue_bounce_pre(mq->mqrq_cur); + mmc_queue_bounce_pre(mqrq); +} + +static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) +{ + struct mmc_blk_data *md = mq->data; + struct mmc_card *card = md->queue.card; + struct mmc_blk_request *brq = &mq->mqrq_cur->brq; + int ret = 1, disable_multi = 0; + + mmc_claim_host(card->host); + + do { + struct mmc_command cmd; + u32 status = 0; + mmc_blk_rw_rq_prep(mq->mqrq_cur, card, disable_multi, mq); mmc_wait_for_req(card->host, &brq->mrq); mmc_queue_bounce_post(mq->mqrq_cur);