linux-toradex.git/include/linux/nvme.h, branch v5.1-rc3

nvme_ioctl.h: remove duplicate GPL boilerplate

2019-02-20T14:22:05+00:00

We already have a ЅPDX header, so no need to duplicate the information.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Sagi Grimberg

nvme: add error log page slot definition

2018-12-13T08:59:01+00:00

This patch adds the NVMe error slot definition from the spec.

Signed-off-by: Chaitanya Kulkarni 
Reviewed-by: Sagi Grimberg 
Signed-off-by: Christoph Hellwig

nvme: remove nvme_common command cdw10 array

2018-12-13T08:59:01+00:00

This is a preparation patch which removes the nvme common command cdw10
array and replace with individual fields. This is needed for the nvmet
error log page implementation make is error log page entry offset
assignment easier.

Signed-off-by: Chaitanya Kulkarni 
Reviewed-by: Sagi Grimberg 
Signed-off-by: Christoph Hellwig

nvme-tcp: Add protocol header

2018-12-13T08:58:57+00:00

Signed-off-by: Sagi Grimberg 
Signed-off-by: Christoph Hellwig

nvme: implement Enhanced Command Retry

2018-12-08T05:26:58+00:00

A controller may have an internal state that is not able to successfully
process commands for a short duration. In such states, an immediate
command requeue is expected to fail. The driver may exceed its max
retry count, which permanently ends the command in failure when the same
command would succeed after waiting for the controller to be ready.

NVMe ratified TP 4033 provides a delay hint in the completion status
code for failed commands. Implement the retry delay based on the command
completion status and the controller's requested delay.

Note that requeued commands are handled per request_queue, not per
individual request. If multiple commands fail, the controller should
consistently report the desired delay time for retryable commands in
all CQEs, otherwise the requeue list may be kicked too soon.

Signed-off-by: Keith Busch 
Reviewed-by: Sagi Grimberg 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

nvmet: expose support for fabrics SQ flow control disable in treq

2018-12-08T05:26:57+00:00

Technical Proposal introduces an indication for SQ flow control
disable support. Expose it since we are able to operate in this mode.

Reviewed-by: Hannes Reinecke 
Signed-off-by: Sagi Grimberg 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

nvmet: don't override treq upon modification.

2018-12-08T05:26:57+00:00

Only override the allowed parts of it.

Reviewed-by: Hannes Reinecke 
Signed-off-by: Sagi Grimberg 
[hch: slight tweak to the NVME_TREQ_SECURE_CHANNEL_MASK definition]
Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

nvmet: support fabrics sq flow control

2018-12-08T05:26:57+00:00

Technical proposal 8005 "fabrics SQ flow control" introduces a mode
where a host and controller agree to omit sq_head pointer updates
when sending nvme completions.

In case the host indicated desire to operate in this mode (connect attribute)
the controller will return back a connect completion with sq_head value
of 0xffff as indication that it will omit sq_head pointer updates.

This mode saves us an atomic update in the I/O path.

Reviewed-by: Hannes Reinecke 
[hch: suggested better implementation]
Signed-off-by: Sagi Grimberg 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

nvmet: add defines for discovery change async events

2018-12-08T05:26:56+00:00

Add AEN/AER values as defined by the specification

Signed-off-by: Jay Sternberg 
Reviewed-by: Sagi Grimberg 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

nvmet: change aen mask functions to use bit numbers

2018-12-08T05:26:56+00:00

Functions nvmet_aen_disabled and nvmet_clear_aen were using
values not bit numbers ie 1 << 9 not 9 for bit function clear_bit
and test_and_set_bit.

Signed-off-by: Jay Sternberg 
Reviewed-by: Phil Cayton 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe