scsi: lpfc: Make FW logging dynamically configurable
BugLink: https://bugs.launchpad.net/bugs/1855303
Currently, the FW logging facility is a load/boot time parameter which
requires the driver to be unloaded/reloaded or the system rebooted in order
to change its configuration.
Convert the logging facility to allow dynamic enablement and configuration.
Specifically:
- Convert the feature so that it can be enabled dynamically via an
attribute. Additionally, the size of the buffer can be configured
dynamically.
- Add locks around states that now may be changing.
- Tie the feature into debugfs so that the logs can be read at any time.
Link: https://lore.kernel.org/r/20191018211832.7917-12-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit
95bfc6d8ad86a76c89f62bb466f740b0fc05a667)
Signed-off-by: Vignesh Gunasekaran <vignesh.gunasekaran@broadcom.com>
Signed-off-by: Jeff Lane <jeffrey.lane@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>