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 per.forlin@linaro.org --- 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 06c7fb5..c93f59b 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -316,95 +316,107 @@ 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;
- 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); + memset(brq, 0, sizeof(struct mmc_blk_request));
- /* - * 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->mrq.cmd = &brq->cmd; + brq->mrq.data = &brq->data;
- /* - * 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 (!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; - } + 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);
- mmc_set_data_timeout(&brq->data, card); + /* + * 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->data.sg = mq->mqrq_cur->sg; - brq->data.sg_len = mmc_queue_map_sg(mq, mq->mqrq_cur); + /* + * 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;
- /* - * Adjust the sg list so it is the same size as the - * request. + if (brq->data.blocks > 1) { + /* SPI multiblock writes terminate using a special + * token, not a STOP_TRANSMISSION 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; - } + 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); + + 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; } - brq->data.sg_len = i; } + brq->data.sg_len = i; + } + + 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_queue_bounce_pre(mq->mqrq_cur); + 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);