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authorChristoph Hellwig <hch@lst.de>2021-04-13 10:52:57 +0000
committerJens Axboe <axboe@kernel.dk>2021-04-13 09:16:12 -0600
commitf8ee34a929a4adf6d29a7ef2145393e6865037ad (patch)
tree666dfb1980ec32465179e62ac58a38b1013c0fcc /drivers/lightnvm
parent655cdafdec1105d0552aa19ffb5ffef7aead1548 (diff)
lightnvm: deprecated OCSSD support and schedule it for removal in Linux 5.15
Lightnvm was an innovative idea to expose more low-level control over SSDs. But it failed to get properly standardized and remains a non-standarized extension to NVMe that requires vendor specific quirks for a few now mostly obsolete SSD devices. The standardized ZNS command set for NVMe has take over a lot of the approaches and allows for fully standardized operation. Remove the Linux code to support open channel SSDs as the few production deployments of the above mentioned SSDs are using userspace driver stacks instead of the fairly limited Linux support. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Javier González <javier@javigon.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Link: https://lore.kernel.org/r/20210413105257.159260-5-matias.bjorling@wdc.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/Kconfig4
-rw-r--r--drivers/lightnvm/core.c2
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig
index 4c2ce210c123..04caa0f2d445 100644
--- a/drivers/lightnvm/Kconfig
+++ b/drivers/lightnvm/Kconfig
@@ -4,7 +4,7 @@
#
menuconfig NVM
- bool "Open-Channel SSD target support"
+ bool "Open-Channel SSD target support (DEPRECATED)"
depends on BLOCK
help
Say Y here to get to enable Open-channel SSDs.
@@ -15,6 +15,8 @@ menuconfig NVM
If you say N, all options in this submenu will be skipped and disabled
only do this if you know what you are doing.
+ This code is deprecated and will be removed in Linux 5.15.
+
if NVM
config NVM_PBLK
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 42774beeba94..40a948c08a0b 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -1174,6 +1174,8 @@ int nvm_register(struct nvm_dev *dev)
{
int ret, exp_pool_size;
+ pr_warn_once("lightnvm support is deprecated and will be removed in Linux 5.15.\n");
+
if (!dev->q || !dev->ops) {
kref_put(&dev->ref, nvm_free);
return -EINVAL;