@@ -2901,6 +2901,29 @@ 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
*/
@@ -3223,6 +3246,17 @@ 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,
@@ -3235,6 +3269,8 @@ 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,
@@ -3243,6 +3279,7 @@ 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,
};