On Fri, Nov 11, 2011 at 7:51 AM, Dong, Chuanxiao <chuanxiao.d...@intel.com> wrote: > Hi Jaehoon, > >> -----Original Message----- >> From: Jaehoon Chung [mailto:jh80.ch...@samsung.com] >> Sent: Wednesday, November 02, 2011 6:29 PM >> To: linux-mmc >> Cc: Chris Ball; Kyungmin Park; Hanumath Prasad; Sebastian Rasmussen; Per >> Forlin; >> svenk...@ti.com; Dong, Chuanxiao >> Subject: [PATCH v2] mmc: support BKOPS feature for eMMC >> >> Enable eMMC background operations (BKOPS) feature. >> >> If URGENT_BKOPS is set after a response, note that BKOPS >> are required. After all I/O requests are finished, run >> BKOPS if required. Should read/write operations be requested >> during BKOPS, first issue HPI to interrupt the ongoing BKOPS >> and then service the request. >> >> If you want to enable this feature, set MMC_CAP2_BKOPS. >> >> Signed-off-by: Jaehoon Chung <jh80.ch...@samsung.com> >> Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com> >> CC: Hanumath Prasad <hanumath.pra...@stericsson.com> >> >> --- >> Changelog V2: >> - Use EXCEPTION_STATUS instead of URGENT_BKOPS >> - Add function to check Exception_status(for eMMC4.5) >> - remove unnecessary code. >> >> drivers/mmc/card/block.c | 9 +++++ >> drivers/mmc/card/queue.c | 4 ++ >> drivers/mmc/core/core.c | 87 >> ++++++++++++++++++++++++++++++++++++++++++++ >> drivers/mmc/core/mmc.c | 9 ++++- >> drivers/mmc/core/mmc_ops.c | 4 ++ >> include/linux/mmc/card.h | 12 ++++++ >> include/linux/mmc/core.h | 3 ++ >> include/linux/mmc/host.h | 1 + >> include/linux/mmc/mmc.h | 14 +++++++ >> 9 files changed, 142 insertions(+), 1 deletions(-) >> >> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c >> index a1cb21f..fbfb405 100644 >> --- a/drivers/mmc/card/block.c >> +++ b/drivers/mmc/card/block.c >> @@ -1192,6 +1192,15 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue >> *mq, struct request *rqc) >> case MMC_BLK_SUCCESS: >> case MMC_BLK_PARTIAL: >> /* >> + * Check BKOPS urgency from each R1 response >> + */ >> + if (mmc_card_mmc(card) && >> + (brq->cmd.resp[0] & R1_EXCEPTION_EVENT)) { >> + if (mmc_is_exception_event(card, >> + EXT_CSD_URGENT_BKOPS)) >> + mmc_card_set_need_bkops(card); >> + } >> + /* > Have you thought about moving this into mmc_wait_for_req_done()? We can check > if the command is a R1 or R1B or not, and set BKOPS bit in there if needed. I > was just thinking if we put such code here, we may only cover the successful > scenario but not for the failed cases. Putting in mmc_wait_for_req_done can > cover all cases. > Good point! I'm in favor of this change.
Thanks, Per -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
