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scsi: lpfc: add support to retrieve firmware logs

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This patch adds the ability to read firmware logs from the adapter. The driver
registers a buffer with the adapter that is then written to by the adapter.
The adapter posts CQEs to indicate content updates in the buffer. While the
adapter is writing to the buffer in a circular fashion, an application will
poll the driver to read the next amount of log data from the buffer.

Driver log buffer size is configurable via the ras_fwlog_buffsize sysfs
attribute. Verbosity to be used by firmware when logging to host memory is
controlled through the ras_fwlog_level attribute.  The ras_fwlog_func
attribute enables or disables loggy by firmware.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart
2018-09-10 10:30:50 -07:00
committed by Martin K. Petersen
parent 18027a8ccc
commit d2cc9bcd7f
9 changed files with 790 additions and 2 deletions
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32
drivers/scsi/lpfc/lpfc_attr.c
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@@ -5430,6 +5430,31 @@ lpfc_sg_seg_cnt_init(struct lpfc_hba *phba, int val)
*/
LPFC_ATTR_R(enable_mds_diags, 0, 0, 1, "Enable MDS Diagnostics");
/*
* lpfc_ras_fwlog_buffsize: Firmware logging host buffer size
* 0 = Disable firmware logging (default)
* [1-4] = Multiple of 1/4th Mb of host memory for FW logging
* Value range [0..4]. Default value is 0
*/
LPFC_ATTR_RW(ras_fwlog_buffsize, 0, 0, 4, "Host memory for FW logging");
/*
* lpfc_ras_fwlog_level: Firmware logging verbosity level
* Valid only if firmware logging is enabled
* 0(Least Verbosity) 4 (most verbosity)
* Value range is [0..4]. Default value is 0
*/
LPFC_ATTR_RW(ras_fwlog_level, 0, 0, 4, "Firmware Logging Level");
/*
* lpfc_ras_fwlog_func: Firmware logging enabled on function number
* Default function which has RAS support : 0
* Value Range is [0..7].
* FW logging is a global action and enablement is via a specific
* port.
*/
LPFC_ATTR_RW(ras_fwlog_func, 0, 0, 7, "Firmware Logging Enabled on Function");
/*
* lpfc_enable_bbcr: Enable BB Credit Recovery
* 0 = BB Credit Recovery disabled
@@ -5555,6 +5580,9 @@ struct device_attribute *lpfc_hba_attrs[] = {
&dev_attr_protocol,
&dev_attr_lpfc_xlane_supported,
&dev_attr_lpfc_enable_mds_diags,
&dev_attr_lpfc_ras_fwlog_buffsize,
&dev_attr_lpfc_ras_fwlog_level,
&dev_attr_lpfc_ras_fwlog_func,
&dev_attr_lpfc_enable_bbcr,
&dev_attr_lpfc_enable_dpp,
NULL,
@@ -6641,6 +6669,10 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
lpfc_sli_mode_init(phba, lpfc_sli_mode);
phba->cfg_enable_dss = 1;
lpfc_enable_mds_diags_init(phba, lpfc_enable_mds_diags);
lpfc_ras_fwlog_buffsize_init(phba, lpfc_ras_fwlog_buffsize);
lpfc_ras_fwlog_level_init(phba, lpfc_ras_fwlog_level);
lpfc_ras_fwlog_func_init(phba, lpfc_ras_fwlog_func);
/* If the NVME FC4 type is enabled, scale the sg_seg_cnt to
* accommodate 512K and 1M IOs in a single nvme buf and supply