Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753007AbcD0LvB (ORCPT ); Wed, 27 Apr 2016 07:51:01 -0400 Received: from mail-wm0-f41.google.com ([74.125.82.41]:38906 "EHLO mail-wm0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752022AbcD0Lu7 (ORCPT ); Wed, 27 Apr 2016 07:50:59 -0400 From: =?UTF-8?q?Matias=20Bj=C3=B8rling?= To: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Cc: =?UTF-8?q?Matias=20Bj=C3=B8rling?= Subject: [PATCH 1/2] lightnvm: move responsibility for bad blk mgmt to target Date: Wed, 27 Apr 2016 13:50:13 +0200 Message-Id: <1461757814-7086-1-git-send-email-m@bjorling.me> X-Mailer: git-send-email 2.1.4 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2347 Lines: 78 We move the responsibility of managing the persistent bad block table to the target. The target may choose to mark a block bad or retry writing to it. Never the less, it should be the target that makes the decision and not the media manager. Signed-off-by: Matias Bjørling --- drivers/lightnvm/gennvm.c | 34 +++++++++++++++------------------- 1 file changed, 15 insertions(+), 19 deletions(-) diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c index 6096077..6f1c420 100644 --- a/drivers/lightnvm/gennvm.c +++ b/drivers/lightnvm/gennvm.c @@ -408,6 +408,9 @@ static void gennvm_blk_set_type(struct nvm_dev *dev, struct ppa_addr *ppa, struct gen_lun *lun; struct nvm_block *blk; + pr_debug("gennvm: ppa (ch: %u lun: %u blk: %u pg: %u) -> %u\n", + ppa->g.ch, ppa->g.lun, ppa->g.blk, ppa->g.pg, type); + if (unlikely(ppa->g.ch > dev->nr_chnls || ppa->g.lun > dev->luns_per_chnl || ppa->g.blk > dev->blks_per_lun)) { @@ -426,39 +429,32 @@ static void gennvm_blk_set_type(struct nvm_dev *dev, struct ppa_addr *ppa, blk->state = type; } -/* mark block bad. It is expected the target recover from the error. */ +/* + * mark block bad in gennvm. It is expected that the target recovers separately + */ static void gennvm_mark_blk_bad(struct nvm_dev *dev, struct nvm_rq *rqd) { - int i; - - if (!dev->ops->set_bb_tbl) - return; - - if (dev->ops->set_bb_tbl(dev, rqd, 1)) - return; + int bit = -1; + int max_secs = dev->ops->max_phys_sect; + void *comp_bits = &rqd->ppa_status; nvm_addr_to_generic_mode(dev, rqd); /* look up blocks and mark them as bad */ - if (rqd->nr_pages > 1) - for (i = 0; i < rqd->nr_pages; i++) - gennvm_blk_set_type(dev, &rqd->ppa_list[i], - NVM_BLK_ST_BAD); - else + if (rqd->nr_pages == 1) gennvm_blk_set_type(dev, &rqd->ppa_addr, NVM_BLK_ST_BAD); + return; + + while ((bit = find_next_bit(comp_bits, max_secs, bit + 1)) < max_secs) + gennvm_blk_set_type(dev, &rqd->ppa_list[bit], NVM_BLK_ST_BAD); } static void gennvm_end_io(struct nvm_rq *rqd) { struct nvm_tgt_instance *ins = rqd->ins; - switch (rqd->error) { - case NVM_RSP_SUCCESS: - case NVM_RSP_ERR_EMPTYPAGE: - break; - case NVM_RSP_ERR_FAILWRITE: + if (rqd->error == NVM_RSP_ERR_FAILWRITE) gennvm_mark_blk_bad(rqd->dev, rqd); - } ins->tt->end_io(rqd); } -- 2.1.4