diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_base.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 7d7cf8b82e9e..e9acbe14af17 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -2900,6 +2900,29 @@ megasas_dump_fusion_io(struct scsi_cmnd *scmd) } +/* + * megasas_dump_sys_regs - This function will dump system registers through + * sysfs. + * @reg_set: Pointer to System register set. + * @buf: Buffer to which output is to be written. + * @return: Number of bytes written to buffer. + */ +static inline ssize_t +megasas_dump_sys_regs(void __iomem *reg_set, char *buf) +{ + unsigned int i, sz = 256; + int bytes_wrote = 0; + char *loc = (char *)buf; + u32 __iomem *reg = (u32 __iomem *)reg_set; + + for (i = 0; i < sz / sizeof(u32); i++) { + bytes_wrote += snprintf(loc + bytes_wrote, PAGE_SIZE, + "%08x: %08x\n", (i * 4), + readl(®[i])); + } + return bytes_wrote; +} + /** * megasas_reset_bus_host - Bus & host reset handler entry point */ @@ -3222,6 +3245,17 @@ megasas_fw_cmds_outstanding_show(struct device *cdev, return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&instance->fw_outstanding)); } +static ssize_t +megasas_dump_system_regs_show(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(cdev); + struct megasas_instance *instance = + (struct megasas_instance *)shost->hostdata; + + return megasas_dump_sys_regs(instance->reg_set, buf); +} + static DEVICE_ATTR(fw_crash_buffer, S_IRUGO | S_IWUSR, megasas_fw_crash_buffer_show, megasas_fw_crash_buffer_store); static DEVICE_ATTR(fw_crash_buffer_size, S_IRUGO, @@ -3234,6 +3268,8 @@ static DEVICE_ATTR(ldio_outstanding, S_IRUGO, megasas_ldio_outstanding_show, NULL); static DEVICE_ATTR(fw_cmds_outstanding, S_IRUGO, megasas_fw_cmds_outstanding_show, NULL); +static DEVICE_ATTR(dump_system_regs, S_IRUGO, + megasas_dump_system_regs_show, NULL); struct device_attribute *megaraid_host_attrs[] = { &dev_attr_fw_crash_buffer_size, @@ -3242,6 +3278,7 @@ struct device_attribute *megaraid_host_attrs[] = { &dev_attr_page_size, &dev_attr_ldio_outstanding, &dev_attr_fw_cmds_outstanding, + &dev_attr_dump_system_regs, NULL, }; |