kernel.git/drivers/lightnvm/pblk-read.c, branch linux-5.0.y

lightnvm: pblk: support packed metadata

2018-12-11T19:22:35Z

pblk performs recovery of open lines by storing the LBA in the per LBA metadata field. Recovery therefore only works for drives that has this field. This patch adds support for packed metadata, which store l2p mapping for open lines in last sector of every write unit and enables drives without per IO metadata to recover open lines. After this patch, drives with OOB size <16B will use packed metadata and metadata size larger than16B will continue to use the device per IO metadata. Reviewed-by: Javier González Signed-off-by: Igor Konopko Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: pblk: add helpers for OOB metadata

2018-12-11T19:22:35Z

pblk currently assumes that size of OOB metadata on drive is always equal to size of pblk_sec_meta struct. This commit add helpers which will allow to handle different sizes of OOB metadata on drive in the future. After this patch only OOB metadata equal to 16 bytes is supported. Reviewed-by: Javier González Signed-off-by: Igor Konopko Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: pblk: move lba list to partial read context

2018-12-11T19:22:34Z

Currently DMA allocated memory is reused on partial read for lba_list_mem and lba_list_media arrays. In preparation for dynamic DMA pool sizes we need to move this arrays into pblk_pr_ctx structures. Reviewed-by: Javier González Signed-off-by: Igor Konopko Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: pblk: add SPDX license tag

2018-10-09T14:25:08Z

Add GLP-2.0 SPDX license tag to all pblk files Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: pblk: encapsulate rqd dma allocations

2018-10-09T14:25:07Z

dma allocations for ppa_list and meta_list in rqd are replicated in several places across the pblk codebase. Make helpers to encapsulate creation and deletion to simplify the code. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: pblk: fix up prints in pblk_read_check_rand

2018-10-09T14:25:07Z

The prefix when printing ppas in pblk_read_check_rand should be "rnd" not "seq", so fix this so we can differentiate between lba missmatches in random and sequential reads. Also change the print order so we align with pblk_read_check_seq, printing read lba first. Signed-off-by: Hans Holmberg Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: introduce nvm_rq_to_ppa_list

2018-10-09T14:25:07Z

There is a number of places in the lightnvm subsystem where the user iterates over the ppa list. Before iterating, the user must know if it is a single or multiple LBAs due to vector commands using either the nvm_rq ->ppa_addr or ->ppa_list fields on command submission, which leads to open-coding the if/else statement. Instead of having multiple if/else's, move it into a function that can be called by its users. A nice side effect of this cleanup is that this patch fixes up a bunch of cases where we don't consider the single-ppa case in pblk. Signed-off-by: Hans Holmberg Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: pblk: improve line helpers

2018-10-09T14:25:06Z

The current helper to obtain a line from a ppa returns the line id, which requires its users to explicitly retrieve the pointer to the line with the id. Make 2 different helpers: one returning the line id and one returning the line directly. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: pblk: refactor put line fn on read completion

2018-10-09T14:25:06Z

The read completion path uses the put_line variable to decide whether the reference on a line should be released. The function name used for that is pblk_read_put_rqd_kref, which could lead one to believe that it is the rqd that is releasing the reference, while it is the line reference that is put. Rename and also split the function in two to account for either rqd or single ppa callers and move it to core, such that it later can be used in the write path as well. Signed-off-by: Matias Bjørling Reviewed-by: Javier González Reviewed-by: Heiner Litz Signed-off-by: Jens Axboe

lightnvm: pblk: remove size and out of bounds read check

2018-10-09T14:25:06Z

The I/O size and capacity checks are already done by the block layer. Signed-off-by: Matias Bjørling Reviewed-by: Javier González Signed-off-by: Jens Axboe