lwn.git/include/linux/nvme.h, branch standardize-docs

nvme: use a single NVME_AQ_DEPTH and relax it to 32

2017-06-28T14:14:13+00:00

No need to differentiate fabrics from pci/loop, also lower it to 32 as we don't really need 256 inflight admin commands. Signed-off-by: Sagi Grimberg Reviewed-by: Martin K. Petersen Reviewed-by: Christoph Hellwig Reviewed-by: Max Gurtovoy Signed-off-by: Keith Busch Signed-off-by: Jens Axboe

nvme: add support for streams and directives

2017-06-27T18:05:56+00:00

This adds support for Directives in NVMe, particular for the Streams directive. Support for Directives is a new feature in NVMe 1.3. It allows a user to pass in information about where to store the data, so that it the device can do so most effiently. If an application is managing and writing data with different life times, mixing differently retentioned data onto the same locations on flash can cause write amplification to grow. This, in turn, will reduce performance and life time of the device. Reviewed-by: Martin K. Petersen Signed-off-by: Jens Axboe

nvme: implement NS Optimal IO Boundary from 1.3 Spec

2017-06-16T06:25:54+00:00

The NVMe 1.3 spec introduces Namespace Optimal IO Boundaries (NOIOB), which standardizes the stripe mechanism we currently have quirks for. This patch implements the necessary logic to handle this new feature. Signed-off-by: Scott Bauer Signed-off-by: Christoph Hellwig

nvme: add fields into identify controller data structure

2017-06-15T12:30:26+00:00

Add the new to NVMe 1.3 fields EDSTT, DSTO, FWUG, HCTMA, MNTMT, MXTMT, and SANICAP into the idenfity controller data structure. Signed-off-by: Guan Junxiong Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig

nvmet: allow overriding the NVMe VS via configfs

2017-06-15T12:30:23+00:00

Allow overriding the announced NVMe Version of a via configfs. This is particularly helpful when debugging new features for the host or target side without bumping the hard coded version (as the target might not be fully compliant to the announced version yet). Signed-off-by: Johannes Thumshirn Reviewed-by: Hannes Reinecke Reviewed-by: Guan Junxiong Signed-off-by: Christoph Hellwig

nvme: introduce NVMe Namespace Identification Descriptor structures

2017-06-15T12:30:16+00:00

Signed-off-by: Johannes Thumshirn Reviewed-by: Max Gurtovoy Reviewed-by: Sagi Grimberg Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig

nvmet: use NVME_IDENTIFY_DATA_SIZE

2017-06-15T12:30:15+00:00

Use NVME_IDENTIFY_DATA_SIZE define instead of hard coding the magic 4096 value. Signed-off-by: Johannes Thumshirn Reviewed-by: Max Gurtovoy Reviewed-by: Sagi Grimberg Reviewed-by: Hannes Reinecke [hch: converted three more users] Signed-off-by: Christoph Hellwig

nvme-pci: remap BAR0 to cover admin CQ doorbell for large stride

2017-06-15T12:29:51+00:00

The existing driver initially maps 8192 bytes of BAR0 which is intended to cover doorbells of admin SQ and CQ. However, if a large stride, e.g. 10, is used, the doorbell of admin CQ will be out of 8192 bytes. Consequently, a page fault will be raised when the admin CQ doorbell is accessed in nvme_configure_admin_queue(). This patch fixes this issue by remapping BAR0 before accessing admin CQ doorbell if the initial mapping is not enough. Signed-off-by: Xu Yu Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig

nvme.h: add dword 12 - 15 fields to struct nvme_features

2017-06-13T09:45:34+00:00

Signed-off-by: Arnav Dawn [hch: split from a larger patch, new changelog] Signed-off-by: Christoph Hellwig Reviewed-by: Keith Busch Reviewed-by: Sagi Grimberg Reviewed-by: Johannes Thumshirn

nvme.h: add struct nvme_host_mem_buf_desc and HMB flags

2017-06-13T09:45:33+00:00

Signed-off-by: Christoph Hellwig Reviewed-by: Keith Busch Reviewed-by: Sagi Grimberg Reviewed-by: Johannes Thumshirn