kernel/linux.git/include/linux/nvme.h, branch v3.13-rc5

NVMe: Use normal shutdown

2013-09-03T20:40:32+00:00

The NVMe spec recommends using the shutdown normal sequence when safely taking the controller offline instead of hitting CC.EN on the next start-up to reset the controller. The spec recommends a minimum of 1 second for the shutdown complete. This patch waits 2 seconds to be on the safe side. Signed-off-by: Keith Busch Signed-off-by: Matthew Wilcox

NVMe: Namespace IDs are unsigned

2013-09-03T20:32:26+00:00

The 'Number of Namespaces' read from the device was being treated as signed, which would cause us to not scan any namespaces for a device with more than 2 billion namespaces. That led to noticing that the namespace ID was also being treated as signed, which could lead to the result from NVME_IOCTL_ID being treated as an error code. Signed-off-by: Matthew Wilcox

NVMe: Split header file into user-visible and kernel-visible pieces

2013-09-03T20:32:25+00:00

To build user programs that call the NVMe ioctls, we need to have a user header file. Catch up to the new way of doing that by splitting the header file into kernel and uapi portions. Signed-off-by: Matthew Wilcox

NVMe: Disk IO statistics

2013-06-20T16:06:35+00:00

Add io stats accounting for bio requests so nvme block devices show useful disk stats. Signed-off-by: Keith Busch Signed-off-by: Matthew Wilcox

NVMe: Simplify Firmware Activate code slightly

2013-05-08T13:55:05+00:00

Add definitions for the three Firmware Activate actions, and change the SCSI translation code to construct the command into a temporary variable instead of translating the endianness back-and-forth. Signed-off-by: Matthew Wilcox Reviewed-by: Vishal Verma

NVMe: Meta-data support in NVME_IOCTL_SUBMIT_IO

2013-05-02T19:35:09+00:00

This adds support for namespaces with separate meta-data formats in the submit io ioctl. The meta-data buffer has to be a contiguous, so such a buffer is allocated and the mapped user pages are copied to/from this buffer for write/read commands. Signed-off-by: Keith Busch Signed-off-by: Matthew Wilcox

NVMe: Device specific stripe size handling

2013-05-02T18:41:05+00:00

We have an nvme device that has a concept of a stripe size. IO requests that do not transfer data crossing a stripe boundary has greater performance compared to IO that does cross it. This patch sets the stripe size for the device if the device and vendor ids match one with this feature and splits IO requests that cross the stripe boundary. Signed-off-by: Keith Busch Signed-off-by: Matthew Wilcox

NVMe: Add a character device for each nvme device

2013-04-16T19:43:55+00:00

Registers a miscellaneous device for each nvme controller probed. This creates character device files as /dev/nvmeN, where N is the device instance, and supports nvme admin ioctl commands so devices without namespaces can be managed. Signed-off-by: Keith Busch Signed-off-by: Matthew Wilcox

NVMe: Fix endian-related problems in user I/O submission path

2013-04-16T19:21:06+00:00

When constructing the command, dsmgmt needs to be treated as a 32-bit value, not a 16-bit value. reftag, apptag and appmask all need to be converted from native-endian to little-endian. Again, sparse's bitwise warnings caught this problem. Thanks to Keith for pointing out the correct way to fix the reftag. Signed-off-by: Matthew Wilcox Acked-by: Keith Busch

NVMe: Abstract out sector to block number conversion

2013-04-16T19:05:22+00:00

Introduce nvme_block_nr() to help convert sectors to block numbers. This fixes an integer overflow in the SCSI conversion layer, and it's slightly less typing than opencoding it. Signed-off-by: Matthew Wilcox Acked-by: Keith Busch