From mboxrd@z Thu Jan 1 00:00:00 1970 From: Seungwon Jeon Subject: [PATCH v8 2/2] mmc: support packed write command for eMMC4.5 device Date: Fri, 29 Jun 2012 13:33:09 +0900 Message-ID: <006901cd55b0$49691180$dc3b3480$%jun@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mailout3.samsung.com ([203.254.224.33]:31391 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750787Ab2F2EdM (ORCPT ); Fri, 29 Jun 2012 00:33:12 -0400 Received: from epcpsbgm1.samsung.com (mailout3.samsung.com [203.254.224.33]) by mailout3.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0M6D005MV3AVQYM0@mailout3.samsung.com> for linux-mmc@vger.kernel.org; Fri, 29 Jun 2012 13:33:10 +0900 (KST) Received: from DOTGIHJUN01 ([12.23.118.161]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0M6D00L3A3B9SP50@mmp2.samsung.com> for linux-mmc@vger.kernel.org; Fri, 29 Jun 2012 13:33:09 +0900 (KST) References: In-reply-to: Content-language: ko Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc@vger.kernel.org Cc: 'Chris Ball' , 'Maya Erez' , 'Subhash Jadavani' , "'S, Venkatraman'" , 'Saugata Das' , 'Namjae Jeon' This patch supports packed write command of eMMC4.5 device. Several 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 Reviewed-by: Maya Erez Reviewed-by: Namjae Jeon --- drivers/mmc/card/block.c | 394 ++++++++++++++++++++++++++++++++++++++++++-- drivers/mmc/card/queue.c | 45 +++++- drivers/mmc/card/queue.h | 12 ++ drivers/mmc/core/mmc_ops.c | 1 + include/linux/mmc/card.h | 5 + include/linux/mmc/core.h | 4 + 6 files changed, 444 insertions(+), 17 deletions(-) diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index f1c84de..c965f2b 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -58,6 +58,12 @@ 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_WR 0x02 + static DEFINE_MUTEX(block_mutex); /* @@ -123,9 +129,21 @@ enum mmc_blk_status { MMC_BLK_NOMEDIUM, }; +enum { + MMC_PACKED_N_IDX = -1, + MMC_PACKED_N_ZERO, + MMC_PACKED_N_SINGLE, +}; + module_param(perdev_minors, int, 0444); MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); +static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq) +{ + mqrq->packed_cmd = MMC_PACKED_NONE; + mqrq->packed_num = MMC_PACKED_N_ZERO; +} + static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) { struct mmc_blk_data *md; @@ -1069,12 +1087,61 @@ 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]; + + mq_rq->packed_retries--; + 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, @@ -1229,10 +1296,206 @@ 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; + + mmc_blk_clear_packed(mq->mqrq_cur); + + if (!(md->flags & MMC_BLK_CMD23) || + !card->ext_csd.packed_event_en) + goto no_packed; + + if ((rq_data_dir(cur) == WRITE) && + (card->host->caps2 & MMC_CAP2_PACKED_WR)) + 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; + + if (mmc_large_sec(card) && + !IS_ALIGNED(blk_rq_sectors(cur), 8)) + 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 += cur->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 (mmc_large_sec(card) && + !IS_ALIGNED(blk_rq_sectors(next), 8)) { + put_back = 1; + 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; + mq->mqrq_cur->packed_retries = reqs; + return reqs; + } + +no_packed: + mmc_blk_clear_packed(mq->mqrq_cur); + return 0; +} + +static void mmc_blk_packed_hdr_wrq_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; + struct request *prq; + struct mmc_blk_data *md = mq->data; + bool do_rel_wr, do_data_tag; + u32 *packed_cmd_hdr = mqrq->packed_cmd_hdr; + u8 i = 1; + + mqrq->packed_cmd = MMC_PACKED_WRITE; + mqrq->packed_blocks = 0; + mqrq->packed_fail_idx = MMC_PACKED_N_IDX; + + memset(packed_cmd_hdr, 0, sizeof(mqrq->packed_cmd_hdr)); + packed_cmd_hdr[0] = (mqrq->packed_num << 16) | + (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); + do_data_tag = (card->ext_csd.data_tag_unit_size) && + (prq->cmd_flags & REQ_META) && + (rq_data_dir(prq) == WRITE) && + ((brq->data.blocks * brq->data.blksz) >= + card->ext_csd.data_tag_unit_size); + /* Argument of CMD23 */ + packed_cmd_hdr[(i * 2)] = + (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) | + (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 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 | (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; + brq->data.blocks = 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 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. @@ -1249,11 +1512,74 @@ static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card, ret = blk_end_request(req, 0, blocks << 9); } } else { - ret = blk_end_request(req, 0, brq->data.bytes_xfered); + if (mq_rq->packed_cmd == MMC_PACKED_NONE) + ret = blk_end_request(req, 0, brq->data.bytes_xfered); } return ret; } +static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq) +{ + struct request *prq; + int idx = mq_rq->packed_fail_idx, i = 0; + int ret = 0; + + while (!list_empty(&mq_rq->packed_list)) { + prq = list_entry_rq(mq_rq->packed_list.next); + if (idx == i) { + /* retry from error index */ + mq_rq->packed_num -= idx; + mq_rq->req = prq; + ret = 1; + + if (mq_rq->packed_num == MMC_PACKED_N_SINGLE) { + list_del_init(&prq->queuelist); + mmc_blk_clear_packed(mq_rq); + } + return ret; + } + list_del_init(&prq->queuelist); + blk_end_request(prq, 0, blk_rq_bytes(prq)); + i++; + } + + mmc_blk_clear_packed(mq_rq); + return ret; +} +static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq) +{ + struct request *prq; + + while (!list_empty(&mq_rq->packed_list)) { + prq = list_entry_rq(mq_rq->packed_list.next); + list_del_init(&prq->queuelist); + blk_end_request(prq, -EIO, blk_rq_bytes(prq)); + } + + mmc_blk_clear_packed(mq_rq); +} + +static void mmc_blk_revert_packed_req(struct mmc_queue *mq, + struct mmc_queue_req *mq_rq) +{ + struct request *prq; + struct request_queue *q = mq->queue; + + while (!list_empty(&mq_rq->packed_list)) { + prq = list_entry_rq(mq_rq->packed_list.prev); + if (prq->queuelist.prev != &mq_rq->packed_list) { + list_del_init(&prq->queuelist); + spin_lock_irq(q->queue_lock); + blk_requeue_request(mq->queue, prq); + spin_unlock_irq(q->queue_lock); + } else { + list_del_init(&prq->queuelist); + } + } + + mmc_blk_clear_packed(mq_rq); +} + static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) { struct mmc_blk_data *md = mq->data; @@ -1264,10 +1590,15 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) struct mmc_queue_req *mq_rq; struct request *req = rqc; struct mmc_async_req *areq; + const u8 packed_num = 2; + u8 reqs = 0; if (!rqc && !mq->mqrq_prev->req) return 0; + if (rqc) + reqs = mmc_blk_prep_packed_list(mq, rqc); + do { if (rqc) { /* @@ -1278,9 +1609,15 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) (card->ext_csd.data_sector_size == 4096)) { pr_err("%s: Transfer size is not 4KB sector size aligned\n", req->rq_disk->disk_name); + mq_rq = mq->mqrq_cur; goto cmd_abort; } - mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq); + + if (reqs >= packed_num) + mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur, + card, mq); + else + mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq); areq = &mq->mqrq_cur->mmc_active; } else areq = NULL; @@ -1301,8 +1638,15 @@ 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); - ret = blk_end_request(req, 0, + + if (mq_rq->packed_cmd != MMC_PACKED_NONE) { + ret = mmc_blk_end_packed_req(mq_rq); + break; + } else { + ret = blk_end_request(req, 0, brq->data.bytes_xfered); + } + /* * If the blk_end_request function returns non-zero even * though all data has been transferred and no errors @@ -1335,7 +1679,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) err = mmc_blk_reset(md, card->host, type); if (!err) break; - if (err == -ENODEV) + if (err == -ENODEV || + mq_rq->packed_cmd != MMC_PACKED_NONE) goto cmd_abort; /* Fall through */ } @@ -1362,25 +1707,46 @@ 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 { + if (!mq_rq->packed_retries) + goto cmd_abort; + mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq); + mmc_start_req(card->host, + &mq_rq->mmc_active, NULL); + } } } while (ret); return 1; cmd_abort: - if (mmc_card_removed(card)) - req->cmd_flags |= REQ_QUIET; - while (ret) - ret = blk_end_request(req, -EIO, blk_rq_cur_bytes(req)); + if (mq_rq->packed_cmd == MMC_PACKED_NONE) { + if (mmc_card_removed(card)) + req->cmd_flags |= REQ_QUIET; + while (ret) + ret = blk_end_request(req, -EIO, + blk_rq_cur_bytes(req)); + } else { + mmc_blk_abort_packed_req(mq_rq); + } start_new_req: if (rqc) { + /* + * If current request is packed, it needs to put back. + */ + if (mq->mqrq_cur->packed_cmd != MMC_PACKED_NONE) + mmc_blk_revert_packed_req(mq, mq->mqrq_cur); + 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 e360a97..165d85a 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -175,6 +175,9 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, if (!mq->queue) return -ENOMEM; + 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; @@ -375,6 +378,35 @@ 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_WRITE) { + __sg = sg; + sg_set_buf(__sg, mqrq->packed_cmd_hdr, + sizeof(mqrq->packed_cmd_hdr)); + 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 */ @@ -385,12 +417,19 @@ 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..5e04938 100644 --- a/drivers/mmc/card/queue.h +++ b/drivers/mmc/card/queue.h @@ -12,6 +12,11 @@ struct mmc_blk_request { struct mmc_data data; }; +enum mmc_packed_cmd { + MMC_PACKED_NONE = 0, + MMC_PACKED_WRITE, +}; + struct mmc_queue_req { struct request *req; struct mmc_blk_request brq; @@ -20,6 +25,13 @@ 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_retries; + int packed_fail_idx; + u8 packed_num; }; struct mmc_queue { diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 0ed2cc5..4ad994a 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/card.h b/include/linux/mmc/card.h index 4aeb4e9..643cd3c 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -294,6 +294,11 @@ static inline void mmc_part_add(struct mmc_card *card, unsigned int size, card->nr_parts++; } +static inline bool mmc_large_sec(struct mmc_card *card) +{ + return card->ext_csd.data_sector_size == 4096; +} + /* * The world is not perfect and supplies us with broken mmc/sdio devices. * For at least some of these bugs we need a work-around. diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 1b431c7..d787037 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -18,6 +18,9 @@ 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)) +#define MMC_CMD23_ARG_TAG_REQ (1 << 29) u32 resp[4]; unsigned int flags; /* expected response type */ #define MMC_RSP_PRESENT (1 << 0) @@ -143,6 +146,7 @@ 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 -- 1.7.0.4