diff options
author | Javier González <jg@lightnvm.io> | 2017-04-15 20:55:37 +0200 |
---|---|---|
committer | Jens Axboe <axboe@fb.com> | 2017-04-16 18:06:25 +0200 |
commit | 17912c49edfa6ab552329bf63d1b757eb874673b (patch) | |
tree | c523ceb84476721084dfb4f68cac0496c8cbb383 /drivers/lightnvm | |
parent | nvme/lightnvm: Prevent small buffer overflow in nvme_nvm_identify (diff) | |
download | linux-17912c49edfa6ab552329bf63d1b757eb874673b.tar.xz linux-17912c49edfa6ab552329bf63d1b757eb874673b.zip |
lightnvm: submit erases using the I/O path
Until now erases have been submitted as synchronous commands through a
dedicated erase function. In order to enable targets implementing
asynchronous erases, refactor the erase path so that it uses the normal
async I/O submission functions. If a target requires sync I/O, it can
implement it internally. Also, adapt rrpc to use the new erase path.
Signed-off-by: Javier González <javier@cnexlabs.com>
Fixed spelling error.
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r-- | drivers/lightnvm/core.c | 54 | ||||
-rw-r--r-- | drivers/lightnvm/rrpc.c | 3 |
2 files changed, 34 insertions, 23 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index 5262ba66a7a7..95105c47e082 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -590,11 +590,11 @@ int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, memset(&rqd, 0, sizeof(struct nvm_rq)); - nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); + nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1); nvm_rq_tgt_to_dev(tgt_dev, &rqd); ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); - nvm_free_rqd_ppalist(dev, &rqd); + nvm_free_rqd_ppalist(tgt_dev, &rqd); if (ret) { pr_err("nvm: failed bb mark\n"); return -EINVAL; @@ -626,34 +626,45 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) } EXPORT_SYMBOL(nvm_submit_io); -int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, int flags) +static void nvm_end_io_sync(struct nvm_rq *rqd) { - struct nvm_dev *dev = tgt_dev->parent; - struct nvm_rq rqd; - int ret; + struct completion *waiting = rqd->private; - if (!dev->ops->erase_block) - return 0; + complete(waiting); +} - nvm_map_to_dev(tgt_dev, ppas); +int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, + int nr_ppas) +{ + struct nvm_geo *geo = &tgt_dev->geo; + struct nvm_rq rqd; + int ret; + DECLARE_COMPLETION_ONSTACK(wait); memset(&rqd, 0, sizeof(struct nvm_rq)); - ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, 1, 1); + rqd.opcode = NVM_OP_ERASE; + rqd.end_io = nvm_end_io_sync; + rqd.private = &wait; + rqd.flags = geo->plane_mode >> 1; + + ret = nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1); if (ret) return ret; - nvm_rq_tgt_to_dev(tgt_dev, &rqd); - - rqd.flags = flags; - - ret = dev->ops->erase_block(dev, &rqd); + ret = nvm_submit_io(tgt_dev, &rqd); + if (ret) { + pr_err("rrpr: erase I/O submission failed: %d\n", ret); + goto free_ppa_list; + } + wait_for_completion_io(&wait); - nvm_free_rqd_ppalist(dev, &rqd); +free_ppa_list: + nvm_free_rqd_ppalist(tgt_dev, &rqd); return ret; } -EXPORT_SYMBOL(nvm_erase_blk); +EXPORT_SYMBOL(nvm_erase_sync); int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb, nvm_l2p_update_fn *update_l2p, void *priv) @@ -732,10 +743,11 @@ void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin) } EXPORT_SYMBOL(nvm_put_area); -int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, +int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, const struct ppa_addr *ppas, int nr_ppas, int vblk) { - struct nvm_geo *geo = &dev->geo; + struct nvm_dev *dev = tgt_dev->parent; + struct nvm_geo *geo = &tgt_dev->geo; int i, plane_cnt, pl_idx; struct ppa_addr ppa; @@ -773,12 +785,12 @@ int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, } EXPORT_SYMBOL(nvm_set_rqd_ppalist); -void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd) +void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) { if (!rqd->ppa_list) return; - nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list); + nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list); } EXPORT_SYMBOL(nvm_free_rqd_ppalist); diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c index e68efbcf1188..4e4c2997337c 100644 --- a/drivers/lightnvm/rrpc.c +++ b/drivers/lightnvm/rrpc.c @@ -414,7 +414,6 @@ static void rrpc_block_gc(struct work_struct *work) struct rrpc *rrpc = gcb->rrpc; struct rrpc_block *rblk = gcb->rblk; struct rrpc_lun *rlun = rblk->rlun; - struct nvm_tgt_dev *dev = rrpc->dev; struct ppa_addr ppa; mempool_free(gcb, rrpc->gcb_pool); @@ -430,7 +429,7 @@ static void rrpc_block_gc(struct work_struct *work) ppa.g.lun = rlun->bppa.g.lun; ppa.g.blk = rblk->id; - if (nvm_erase_blk(dev, &ppa, 0)) + if (nvm_erase_sync(rrpc->dev, &ppa, 1)) goto put_back; rrpc_put_blk(rrpc, rblk); |