From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751484Ab2ATEGv (ORCPT ); Thu, 19 Jan 2012 23:06:51 -0500 Received: from mailout2.samsung.com ([203.254.224.25]:39646 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750864Ab2ATEGs (ORCPT ); Thu, 19 Jan 2012 23:06:48 -0500 X-AuditID: cbfee61b-b7be3ae0000039aa-22-4f18e857f4c6 From: Seungwon Jeon To: linux-mmc@vger.kernel.org Cc: "'Chris Ball'" , linux-kernel@vger.kernel.org Subject: [PATCH v3 2/2] mmc: core: Support packed command for eMMC4.5 device Date: Fri, 20 Jan 2012 13:06:47 +0900 Message-id: <002701ccd728$edab9350$c902b9f0$%jun@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=UTF-8 Content-transfer-encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-index: AczXKO2QpxhRQEBoRNaNPBsYWCRLYQ== Content-language: ko X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch supports packed command of eMMC4.5 device. Several reads(or writes) can be grouped in packed command and all data of the individual commands can be sent in a single transfer on the bus. Signed-off-by: Seungwon Jeon --- drivers/mmc/card/block.c | 469 +++++++++++++++++++++++++++++++++++++++++--- drivers/mmc/card/queue.c | 48 +++++- drivers/mmc/card/queue.h | 13 ++ drivers/mmc/core/host.c | 2 + drivers/mmc/core/mmc_ops.c | 1 + include/linux/mmc/core.h | 3 + include/linux/mmc/host.h | 3 + 7 files changed, 512 insertions(+), 27 deletions(-) diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 176b78e..77d457e 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -59,6 +59,13 @@ MODULE_ALIAS("mmc:block"); #define INAND_CMD38_ARG_SECTRIM1 0x81 #define INAND_CMD38_ARG_SECTRIM2 0x88 +#define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \ + (req->cmd_flags & REQ_META)) && \ + (rq_data_dir(req) == WRITE)) +#define PACKED_CMD_VER 0x01 +#define PACKED_CMD_RD 0x01 +#define PACKED_CMD_WR 0x02 + static DEFINE_MUTEX(block_mutex); /* @@ -99,6 +106,7 @@ struct mmc_blk_data { #define MMC_BLK_WRITE BIT(1) #define MMC_BLK_DISCARD BIT(2) #define MMC_BLK_SECDISCARD BIT(3) +#define MMC_BLK_WR_HDR BIT(4) /* * Only set in main mmc_blk_data associated @@ -1028,7 +1036,8 @@ static int mmc_blk_err_check(struct mmc_card *card, * kind. If it was a write, we may have transitioned to * program mode, which we have to wait for it to complete. */ - if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { + if ((!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) || + (mq_mrq->packed_cmd == MMC_PACKED_WR_HDR)) { u32 status; do { int err = get_card_status(card, &status, 5); @@ -1053,7 +1062,8 @@ static int mmc_blk_err_check(struct mmc_card *card, (unsigned)blk_rq_sectors(req), brq->cmd.resp[0], brq->stop.resp[0]); - if (rq_data_dir(req) == READ) { + if (rq_data_dir(req) == READ && + mq_mrq->packed_cmd != MMC_PACKED_WR_HDR) { if (ecc_err) return MMC_BLK_ECC_ERR; return MMC_BLK_DATA_ERR; @@ -1065,12 +1075,60 @@ static int mmc_blk_err_check(struct mmc_card *card, if (!brq->data.bytes_xfered) return MMC_BLK_RETRY; + if (mq_mrq->packed_cmd != MMC_PACKED_NONE) { + if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered)) + return MMC_BLK_PARTIAL; + else + return MMC_BLK_SUCCESS; + } + if (blk_rq_bytes(req) != brq->data.bytes_xfered) return MMC_BLK_PARTIAL; return MMC_BLK_SUCCESS; } +static int mmc_blk_packed_err_check(struct mmc_card *card, + struct mmc_async_req *areq) +{ + struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req, + mmc_active); + struct request *req = mq_rq->req; + int err, check, status; + u8 ext_csd[512]; + + check = mmc_blk_err_check(card, areq); + err = get_card_status(card, &status, 0); + if (err) { + pr_err("%s: error %d sending status command\n", + req->rq_disk->disk_name, err); + return MMC_BLK_ABORT; + } + + if (status & R1_EXP_EVENT) { + err = mmc_send_ext_csd(card, ext_csd); + if (err) { + pr_err("%s: error %d sending ext_csd\n", + req->rq_disk->disk_name, err); + return MMC_BLK_ABORT; + } + + if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] & + EXT_CSD_PACKED_FAILURE) && + (ext_csd[EXT_CSD_PACKED_CMD_STATUS] & + EXT_CSD_PACKED_GENERIC_ERROR)) { + if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] & + EXT_CSD_PACKED_INDEXED_ERROR) { + mq_rq->packed_fail_idx = + ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1; + return MMC_BLK_PARTIAL; + } + } + } + + return check; +} + static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, struct mmc_card *card, int disable_multi, @@ -1225,10 +1283,238 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, mmc_queue_bounce_pre(mqrq); } +static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req) +{ + struct request_queue *q = mq->queue; + struct mmc_card *card = mq->card; + struct request *cur = req, *next = NULL; + struct mmc_blk_data *md = mq->data; + bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN; + unsigned int req_sectors = 0, phys_segments = 0; + unsigned int max_blk_count, max_phys_segs; + u8 put_back = 0; + u8 max_packed_rw = 0; + u8 reqs = 0; + + mq->mqrq_cur->packed_num = 0; + + if (!(md->flags & MMC_BLK_CMD23) || + !card->ext_csd.packed_event_en) + goto no_packed; + + if (rq_data_dir(cur) == READ) + max_packed_rw = card->ext_csd.max_packed_reads; + else + max_packed_rw = card->ext_csd.max_packed_writes; + + if (max_packed_rw == 0) + goto no_packed; + + if (mmc_req_rel_wr(cur) && + (md->flags & MMC_BLK_REL_WR) && + !en_rel_wr) { + goto no_packed; + } + + max_blk_count = min(card->host->max_blk_count, + card->host->max_req_size >> 9); + if (unlikely(max_blk_count > 0xffff)) + max_blk_count = 0xffff; + + max_phys_segs = queue_max_segments(q); + req_sectors += blk_rq_sectors(cur); + phys_segments += req->nr_phys_segments; + + if (rq_data_dir(cur) == WRITE) { + req_sectors++; + phys_segments++; + } + + while (reqs < max_packed_rw - 1) { + spin_lock_irq(q->queue_lock); + next = blk_fetch_request(q); + spin_unlock_irq(q->queue_lock); + if (!next) + break; + + if (next->cmd_flags & REQ_DISCARD || + next->cmd_flags & REQ_FLUSH) { + put_back = 1; + break; + } + + if (rq_data_dir(cur) != rq_data_dir(next)) { + put_back = 1; + break; + } + + if (mmc_req_rel_wr(next) && + (md->flags & MMC_BLK_REL_WR) && + !en_rel_wr) { + put_back = 1; + break; + } + + req_sectors += blk_rq_sectors(next); + if (req_sectors > max_blk_count) { + put_back = 1; + break; + } + + phys_segments += next->nr_phys_segments; + if (phys_segments > max_phys_segs) { + put_back = 1; + break; + } + + list_add_tail(&next->queuelist, &mq->mqrq_cur->packed_list); + cur = next; + reqs++; + } + + if (put_back) { + spin_lock_irq(q->queue_lock); + blk_requeue_request(q, next); + spin_unlock_irq(q->queue_lock); + } + + if (reqs > 0) { + list_add(&req->queuelist, &mq->mqrq_cur->packed_list); + mq->mqrq_cur->packed_num = ++reqs; + return reqs; + } + +no_packed: + mq->mqrq_cur->packed_cmd = MMC_PACKED_NONE; + mq->mqrq_cur->packed_num = 0; + return 0; +} + +static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq, + struct mmc_card *card, + struct mmc_queue *mq, + u8 reqs) +{ + struct mmc_blk_request *brq = &mqrq->brq; + struct request *req = mqrq->req; + struct request *prq; + struct mmc_blk_data *md = mq->data; + bool do_rel_wr; + u32 *packed_cmd_hdr = mqrq->packed_cmd_hdr; + u8 i = 1; + + mqrq->packed_cmd = (rq_data_dir(req) == READ) ? + MMC_PACKED_WR_HDR : MMC_PACKED_WRITE; + mqrq->packed_blocks = 0; + mqrq->packed_fail_idx = -1; + + memset(packed_cmd_hdr, 0, sizeof(mqrq->packed_cmd_hdr)); + packed_cmd_hdr[0] = (reqs << 16) | + (((rq_data_dir(req) == READ) ? + PACKED_CMD_RD : PACKED_CMD_WR) << 8) | + PACKED_CMD_VER; + + /* + * Argument for each entry of packed group + */ + list_for_each_entry(prq, &mqrq->packed_list, queuelist) { + do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR); + /* Argument of CMD23*/ + packed_cmd_hdr[(i * 2)] = (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) | + blk_rq_sectors(prq); + /* Argument of CMD18 or CMD25 */ + packed_cmd_hdr[((i * 2)) + 1] = mmc_card_blockaddr(card) ? + blk_rq_pos(prq) : blk_rq_pos(prq) << 9; + mqrq->packed_blocks += blk_rq_sectors(prq); + i++; + } + + memset(brq, 0, sizeof(struct mmc_blk_request)); + brq->mrq.cmd = &brq->cmd; + brq->mrq.data = &brq->data; + brq->mrq.sbc = &brq->sbc; + brq->mrq.stop = &brq->stop; + + brq->sbc.opcode = MMC_SET_BLOCK_COUNT; + brq->sbc.arg = MMC_CMD23_ARG_PACKED | + ((rq_data_dir(req) == READ) ? 1 : mqrq->packed_blocks + 1); + brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; + + brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK; + 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; + /* + * Write separately the packd command header only for packed read. + * In case of packed write, header is sent with blocks of data. + */ + brq->data.blocks = (rq_data_dir(req) == READ) ? + 1 : mqrq->packed_blocks + 1; + brq->data.flags |= MMC_DATA_WRITE; + + brq->stop.opcode = MMC_STOP_TRANSMISSION; + brq->stop.arg = 0; + brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; + + mmc_set_data_timeout(&brq->data, card); + + brq->data.sg = mqrq->sg; + brq->data.sg_len = mmc_queue_map_sg(mq, mqrq); + + mqrq->mmc_active.mrq = &brq->mrq; + mqrq->mmc_active.err_check = mmc_blk_packed_err_check; + + mmc_queue_bounce_pre(mqrq); +} + +static void mmc_blk_packed_rrq_prep(struct mmc_queue_req *mqrq, + struct mmc_card *card, + struct mmc_queue *mq) +{ + struct mmc_blk_request *brq = &mqrq->brq; + struct request *req = mqrq->req; + + mqrq->packed_cmd = MMC_PACKED_READ; + + memset(brq, 0, sizeof(struct mmc_blk_request)); + brq->mrq.cmd = &brq->cmd; + brq->mrq.data = &brq->data; + brq->mrq.stop = &brq->stop; + + brq->cmd.opcode = MMC_READ_MULTIPLE_BLOCK; + 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->data.blocks = mqrq->packed_blocks; + brq->data.flags |= MMC_DATA_READ; + + brq->stop.opcode = MMC_STOP_TRANSMISSION; + brq->stop.arg = 0; + brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; + + mmc_set_data_timeout(&brq->data, card); + + brq->data.sg = mqrq->sg; + brq->data.sg_len = mmc_queue_map_sg(mq, mqrq); + + mqrq->mmc_active.mrq = &brq->mrq; + mqrq->mmc_active.err_check = mmc_blk_packed_err_check; + + mmc_queue_bounce_pre(mqrq); +} + static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card, struct mmc_blk_request *brq, struct request *req, int ret) { + struct mmc_queue_req *mq_rq; + mq_rq = container_of(brq, struct mmc_queue_req, brq); + /* * If this is an SD card and we're writing, we can first * mark the known good sectors as ok. @@ -1247,13 +1533,65 @@ static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card, spin_unlock_irq(&md->lock); } } else { - spin_lock_irq(&md->lock); - ret = __blk_end_request(req, 0, brq->data.bytes_xfered); - spin_unlock_irq(&md->lock); + if (mq_rq->packed_cmd == MMC_PACKED_NONE) { + spin_lock_irq(&md->lock); + ret = __blk_end_request(req, 0, brq->data.bytes_xfered); + spin_unlock_irq(&md->lock); + } } return ret; } +static int mmc_blk_chk_hdr_err(struct mmc_queue *mq, int status) +{ + struct mmc_blk_data *md = mq->data; + struct mmc_card *card = md->queue.card; + int type = MMC_BLK_WR_HDR, err = 0; + + switch (status) { + case MMC_BLK_PARTIAL: + case MMC_BLK_RETRY: + err = 0; + break; + case MMC_BLK_CMD_ERR: + case MMC_BLK_ABORT: + case MMC_BLK_DATA_ERR: + case MMC_BLK_ECC_ERR: + err = mmc_blk_reset(md, card->host, type); + if (!err) + mmc_blk_reset_success(md, type); + break; + } + + return err; +} + +static int mmc_blk_issue_packed_rd(struct mmc_queue *mq, + struct mmc_queue_req *mq_rq) +{ + struct mmc_blk_data *md = mq->data; + struct mmc_card *card = md->queue.card; + int status, ret = -EIO, retry = 2; + + do { + mmc_start_req(card->host, NULL, (int *) &status); + if (status) { + ret = mmc_blk_chk_hdr_err(mq, status); + if (ret) + break; + mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq, mq_rq->packed_num); + mmc_start_req(card->host, &mq_rq->mmc_active, NULL); + } else { + mmc_blk_packed_rrq_prep(mq_rq, card, mq); + mmc_start_req(card->host, &mq_rq->mmc_active, NULL); + ret = 0; + break; + } + } while (retry-- > 0); + + return ret; +} + static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) { struct mmc_blk_data *md = mq->data; @@ -1262,21 +1600,32 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) int ret = 1, disable_multi = 0, retry = 0, type; enum mmc_blk_status status; struct mmc_queue_req *mq_rq; - struct request *req; + struct request *req, *prq; struct mmc_async_req *areq; + u8 reqs = 0; if (!rqc && !mq->mqrq_prev->req) return 0; + if (rqc) + reqs = mmc_blk_prep_packed_list(mq, rqc); + do { if (rqc) { - mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq); + if (reqs >= card->host->packed_min) + mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur, card, mq, reqs); + else + mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq); areq = &mq->mqrq_cur->mmc_active; } else areq = NULL; areq = mmc_start_req(card->host, areq, (int *) &status); - if (!areq) - return 0; + if (!areq) { + if (mq->mqrq_cur->packed_cmd == MMC_PACKED_WR_HDR) + goto snd_packed_rd; + else + return 0; + } mq_rq = container_of(areq, struct mmc_queue_req, mmc_active); brq = &mq_rq->brq; @@ -1291,10 +1640,38 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) * A block was successfully transferred. */ mmc_blk_reset_success(md, type); - spin_lock_irq(&md->lock); - ret = __blk_end_request(req, 0, + + if (mq_rq->packed_cmd != MMC_PACKED_NONE) { + int idx = mq_rq->packed_fail_idx, i = 0; + while (!list_empty(&mq_rq->packed_list)) { + prq = list_entry_rq(mq_rq->packed_list.next); + list_del_init(&prq->queuelist); + if (idx == i) { + /* retry from error index */ + mq_rq->packed_num -= idx; + if (mq_rq->packed_num == 1) { + mq_rq->packed_cmd = MMC_PACKED_NONE; + mq_rq->packed_num = 0; + } + mq_rq->req = prq; + ret = 1; + break; + } + spin_lock_irq(&md->lock); + ret = __blk_end_request(prq, 0, blk_rq_bytes(prq)); + spin_unlock_irq(&md->lock); + i++; + } + if (idx == -1) + mq_rq->packed_num = 0; + break; + } else { + spin_lock_irq(&md->lock); + ret = __blk_end_request(req, 0, brq->data.bytes_xfered); - spin_unlock_irq(&md->lock); + spin_unlock_irq(&md->lock); + } + /* * If the blk_end_request function returns non-zero even * though all data has been transferred and no errors @@ -1329,6 +1706,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) break; if (err == -ENODEV) goto cmd_abort; + if (mq_rq->packed_cmd != MMC_PACKED_NONE) + break; /* Fall through */ } case MMC_BLK_ECC_ERR: @@ -1356,27 +1735,69 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) } if (ret) { - /* - * In case of a incomplete request - * prepare it again and resend. - */ - mmc_blk_rw_rq_prep(mq_rq, card, disable_multi, mq); - mmc_start_req(card->host, &mq_rq->mmc_active, NULL); + if (mq_rq->packed_cmd == MMC_PACKED_NONE) { + /* + * In case of a incomplete request + * prepare it again and resend. + */ + mmc_blk_rw_rq_prep(mq_rq, card, disable_multi, mq); + mmc_start_req(card->host, &mq_rq->mmc_active, NULL); + } else { + mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq, mq_rq->packed_num); + mmc_start_req(card->host, &mq_rq->mmc_active, NULL); + if (mq_rq->packed_cmd == MMC_PACKED_WR_HDR) { + if (mmc_blk_issue_packed_rd(mq, mq_rq)) + goto cmd_abort; + } + } } } while (ret); +snd_packed_rd: + if (mq->mqrq_cur->packed_cmd == MMC_PACKED_WR_HDR) { + if (mmc_blk_issue_packed_rd(mq, mq->mqrq_cur)) + goto start_new_req; + } return 1; cmd_abort: - spin_lock_irq(&md->lock); - if (mmc_card_removed(card)) - req->cmd_flags |= REQ_QUIET; - while (ret) - ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req)); - spin_unlock_irq(&md->lock); + if (mq_rq->packed_cmd == MMC_PACKED_NONE) { + spin_lock_irq(&md->lock); + if (mmc_card_removed(card)) + req->cmd_flags |= REQ_QUIET; + while (ret) + ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req)); + spin_unlock_irq(&md->lock); + } else { + while (!list_empty(&mq_rq->packed_list)) { + prq = list_entry_rq(mq_rq->packed_list.next); + list_del_init(&prq->queuelist); + spin_lock_irq(&md->lock); + __blk_end_request(prq, -EIO, blk_rq_bytes(prq)); + spin_unlock_irq(&md->lock); + } + } start_new_req: if (rqc) { + /* + * If current request is packed, it need to put back. + */ + if (mq->mqrq_cur->packed_cmd != MMC_PACKED_NONE) { + while (!list_empty(&mq->mqrq_cur->packed_list)) { + prq = list_entry_rq(mq->mqrq_cur->packed_list.prev); + if (prq->queuelist.prev != &mq->mqrq_cur->packed_list) { + list_del_init(&prq->queuelist); + spin_lock_irq(mq->queue->queue_lock); + blk_requeue_request(mq->queue, prq); + spin_unlock_irq(mq->queue->queue_lock); + } else { + list_del_init(&prq->queuelist); + } + } + mq->mqrq_cur->packed_cmd = MMC_PACKED_NONE; + mq->mqrq_cur->packed_num = 0; + } mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq); mmc_start_req(card->host, &mq->mqrq_cur->mmc_active, NULL); } diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index 2517547..af7aee5 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -177,6 +177,8 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, memset(&mq->mqrq_cur, 0, sizeof(mq->mqrq_cur)); memset(&mq->mqrq_prev, 0, sizeof(mq->mqrq_prev)); + INIT_LIST_HEAD(&mqrq_cur->packed_list); + INIT_LIST_HEAD(&mqrq_prev->packed_list); mq->mqrq_cur = mqrq_cur; mq->mqrq_prev = mqrq_prev; mq->queue->queuedata = mq; @@ -377,6 +379,39 @@ void mmc_queue_resume(struct mmc_queue *mq) } } +static unsigned int mmc_queue_packed_map_sg(struct mmc_queue *mq, + struct mmc_queue_req *mqrq, + struct scatterlist *sg) +{ + struct scatterlist *__sg; + unsigned int sg_len = 0; + struct request *req; + enum mmc_packed_cmd cmd; + + cmd = mqrq->packed_cmd; + + if (cmd == MMC_PACKED_WR_HDR || cmd == MMC_PACKED_WRITE) { + __sg = sg; + sg_set_buf(__sg, mqrq->packed_cmd_hdr, + sizeof(mqrq->packed_cmd_hdr)); + sg_len++; + if (cmd == MMC_PACKED_WR_HDR) { + sg_mark_end(__sg); + return sg_len; + } + __sg->page_link &= ~0x02; + } + + __sg = sg + sg_len; + list_for_each_entry(req, &mqrq->packed_list, queuelist) { + sg_len += blk_rq_map_sg(mq->queue, req, __sg); + __sg = sg + (sg_len - 1); + (__sg++)->page_link &= ~0x02; + } + sg_mark_end(sg + (sg_len - 1)); + return sg_len; +} + /* * Prepare the sg list(s) to be handed of to the host driver */ @@ -387,12 +422,19 @@ unsigned int mmc_queue_map_sg(struct mmc_queue *mq, struct mmc_queue_req *mqrq) struct scatterlist *sg; int i; - if (!mqrq->bounce_buf) - return blk_rq_map_sg(mq->queue, mqrq->req, mqrq->sg); + if (!mqrq->bounce_buf) { + if (!list_empty(&mqrq->packed_list)) + return mmc_queue_packed_map_sg(mq, mqrq, mqrq->sg); + else + return blk_rq_map_sg(mq->queue, mqrq->req, mqrq->sg); + } BUG_ON(!mqrq->bounce_sg); - sg_len = blk_rq_map_sg(mq->queue, mqrq->req, mqrq->bounce_sg); + if (!list_empty(&mqrq->packed_list)) + sg_len = mmc_queue_packed_map_sg(mq, mqrq, mqrq->bounce_sg); + else + sg_len = blk_rq_map_sg(mq->queue, mqrq->req, mqrq->bounce_sg); mqrq->bounce_sg_len = sg_len; diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h index d2a1eb4..be58b3c 100644 --- a/drivers/mmc/card/queue.h +++ b/drivers/mmc/card/queue.h @@ -12,6 +12,13 @@ struct mmc_blk_request { struct mmc_data data; }; +enum mmc_packed_cmd { + MMC_PACKED_NONE = 0, + MMC_PACKED_WR_HDR, + MMC_PACKED_WRITE, + MMC_PACKED_READ, +}; + struct mmc_queue_req { struct request *req; struct mmc_blk_request brq; @@ -20,6 +27,12 @@ struct mmc_queue_req { struct scatterlist *bounce_sg; unsigned int bounce_sg_len; struct mmc_async_req mmc_active; + struct list_head packed_list; + u32 packed_cmd_hdr[128]; + unsigned int packed_blocks; + enum mmc_packed_cmd packed_cmd; + int packed_fail_idx; + u8 packed_num; }; struct mmc_queue { diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 30055f2..10350ce 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -346,6 +346,8 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev) host->max_blk_size = 512; host->max_blk_count = PAGE_CACHE_SIZE / 512; + host->packed_min = 2; + return host; free: diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 4d41fa9..1e17bd7 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -335,6 +335,7 @@ int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, ext_csd, 512); } +EXPORT_SYMBOL_GPL(mmc_send_ext_csd); int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp) { diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 87a976c..07a4149 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -18,6 +18,8 @@ struct mmc_request; struct mmc_command { u32 opcode; u32 arg; +#define MMC_CMD23_ARG_REL_WR (1 << 31) +#define MMC_CMD23_ARG_PACKED ((0 << 31) | (1 << 30)) u32 resp[4]; unsigned int flags; /* expected response type */ #define MMC_RSP_PRESENT (1 << 0) @@ -143,6 +145,7 @@ extern int mmc_app_cmd(struct mmc_host *, struct mmc_card *); extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *, struct mmc_command *, int); extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int); +extern int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd); #define MMC_ERASE_ARG 0x00000000 #define MMC_SECURE_ERASE_ARG 0x80000000 diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index e22f541..8984259 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -286,6 +286,9 @@ struct mmc_host { unsigned int max_blk_count; /* maximum number of blocks in one req */ unsigned int max_discard_to; /* max. discard timeout in ms */ + u8 packed_min; /* minimum number of packed entries */ + + /* private data */ spinlock_t lock; /* lock for claim and bus ops */ -- 1.7.0.4