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| author | Kashyap, Desai <kashyap.desai@lsi.com> | 2010-06-17 10:13:17 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-07-27 19:02:14 +0200 |
| commit | 570c67ac443dab5c46e5744e950f0539724cb65d (patch) | |
| tree | dad14200b33f9c0d24c43886b7a88b2a7bf0f2eb /drivers/scsi/mpt2sas/mpt2sas_base.c | |
| parent | [SCSI] mpt2sas: MPI header version N is updated. (diff) | |
| download | linux-570c67ac443dab5c46e5744e950f0539724cb65d.tar.xz linux-570c67ac443dab5c46e5744e950f0539724cb65d.zip | |
[SCSI] mpt2sas: Added sysfs support for trace buffer
Added support so the diag ring buffer can be pulled via sysfs
Added three new shost attributes: host_trace_buffer,
host_trace_buffer_enable, and host_trace_buffer_size. The
host_trace_buffer_enable attribute is used to either post or release
the trace buffers. The host_trace_buffer_size attribute contains
the size of the trace buffer. The host_trace_buffer atttribute contains
a maximum 4KB window of the buffer. In order to read the entire host buffer,
you will need to write the offset to host_trace_buffer prior to reading
it. release the host buffer, then write the entire host buffer contents to
a file.
In addition to this enhancement, we moved the automatic posting of host buffers
at driver load time to be called prior to port_enable, instead of after.
That way discovery is available in the host buffer.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/mpt2sas/mpt2sas_base.c')
| -rw-r--r-- | drivers/scsi/mpt2sas/mpt2sas_base.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c index 88befc798469..93c06239d951 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.c +++ b/drivers/scsi/mpt2sas/mpt2sas_base.c @@ -3529,8 +3529,12 @@ _base_make_ioc_operational(struct MPT2SAS_ADAPTER *ioc, int sleep_flag) if (sleep_flag == CAN_SLEEP) _base_static_config_pages(ioc); - if (ioc->wait_for_port_enable_to_complete && disable_discovery > 0) - return r; + if (ioc->wait_for_port_enable_to_complete) { + if (diag_buffer_enable != 0) + mpt2sas_enable_diag_buffer(ioc, diag_buffer_enable); + if (disable_discovery > 0) + return r; + } r = _base_send_port_enable(ioc, sleep_flag); if (r) @@ -3679,8 +3683,6 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc) goto out_free_resources; mpt2sas_base_start_watchdog(ioc); - if (diag_buffer_enable != 0) - mpt2sas_enable_diag_buffer(ioc, diag_buffer_enable); return 0; out_free_resources: |