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| author | Igor Konopko <igor.j.konopko@intel.com> | 2019-05-04 20:37:55 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-05-06 10:19:17 -0600 |
| commit | a14669ebc0e294f19b2290c294958b7741559d9d (patch) | |
| tree | 833538849f051b5ebe5ba8509a64453ef7653e6d /drivers/lightnvm | |
| parent | d38954ed1b76a2814057cd4af92c6966bceb3d3c (diff) | |
| download | linux-0-day-a14669ebc0e294f19b2290c294958b7741559d9d.tar.gz linux-0-day-a14669ebc0e294f19b2290c294958b7741559d9d.tar.xz | |
lightnvm: Inherit mdts from the parent nvme device
Current lightnvm and pblk implementation does not care about NVMe max
data transfer size, which can be smaller than 64*K=256K. There are
existing NVMe controllers which NVMe max data transfer size is lower
that 256K (for example 128K, which happens for existing NVMe
controllers which are NVMe spec compliant). Such a controllers are not
able to handle command which contains 64 PPAs, since the the size of
DMAed buffer will be above the capabilities of such a controller.
Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Reviewed-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Reviewed-by: Javier González <javier@javigon.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
| -rw-r--r-- | drivers/lightnvm/core.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index 5f82036fe322c..c01f83b8fbaf1 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -325,6 +325,7 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) struct nvm_target *t; struct nvm_tgt_dev *tgt_dev; void *targetdata; + unsigned int mdts; int ret; switch (create->conf.type) { @@ -412,8 +413,12 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) tdisk->private_data = targetdata; tqueue->queuedata = targetdata; - blk_queue_max_hw_sectors(tqueue, - (dev->geo.csecs >> 9) * NVM_MAX_VLBA); + mdts = (dev->geo.csecs >> 9) * NVM_MAX_VLBA; + if (dev->geo.mdts) { + mdts = min_t(u32, dev->geo.mdts, + (dev->geo.csecs >> 9) * NVM_MAX_VLBA); + } + blk_queue_max_hw_sectors(tqueue, mdts); set_capacity(tdisk, tt->capacity(targetdata)); add_disk(tdisk); |