[SCSI] qla2xxx: Basic infrastructure for dynamic logging.

This patch adds the dynamic logging framework to the qla2xxx driver.
The user will be able to change the logging levels on the fly i.e.
without load/unload of the driver. This also enables logging to be
enabled for a particular section of the driver such as initialization,
device discovery etc.

Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_dbg.h b/drivers/scsi/qla2xxx/qla_dbg.h
index 930414541ec6..f955094fd5d8 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.h
+++ b/drivers/scsi/qla2xxx/qla_dbg.h
@@ -370,3 +370,50 @@ struct qla2xxx_fw_dump {
                 struct qla81xx_fw_dump isp81;
         } isp;
 };
+
+#define QL_MSGHDR "qla2xxx"
+
+#define ql_log_fatal            0 /* display fatal errors */
+#define ql_log_warn             1 /* display critical errors */
+#define ql_log_info             2 /* display all recovered errors */
+#define ql_log_all              3 /* This value is only used by ql_errlev.
+                                   * No messages will use this value.
+                                   * This should be always highest value
+                                   * as compared to other log levels.
+                                   */
+
+extern int ql_errlev;
+
+void
+ql_dbg(uint32_t, scsi_qla_host_t *vha, int32_t, char *, ...);
+void
+ql_dbg_pci(uint32_t, struct pci_dev *pdev, int32_t, char *, ...);
+
+void
+ql_log(uint32_t, scsi_qla_host_t *vha, int32_t, char *, ...);
+void
+ql_log_pci(uint32_t, struct pci_dev *pdev, int32_t, char *, ...);
+
+/* Debug Levels */
+/* The 0x40000000 is the max value any debug level can have
+ * as ql2xextended_error_logging is of type signed int
+ */
+#define ql_dbg_init     0x40000000 /* Init Debug */
+#define ql_dbg_mbx      0x20000000 /* MBX Debug */
+#define ql_dbg_disc     0x10000000 /* Device Discovery Debug */
+#define ql_dbg_io       0x08000000 /* IO Tracing Debug */
+#define ql_dbg_dpc      0x04000000 /* DPC Thead Debug */
+#define ql_dbg_async    0x02000000 /* Async events Debug */
+#define ql_dbg_timer    0x01000000 /* Timer Debug */
+#define ql_dbg_user     0x00800000 /* User Space Interations Debug */
+#define ql_dbg_taskm    0x00400000 /* Task Management Debug */
+#define ql_dbg_aer      0x00200000 /* AER/EEH Debug */
+#define ql_dbg_multiq   0x00100000 /* MultiQ Debug */
+#define ql_dbg_p3p      0x00080000 /* P3P specific Debug */
+#define ql_dbg_vport    0x00040000 /* Virtual Port Debug */
+#define ql_dbg_buffer   0x00020000 /* For dumping the buffer/regs */
+#define ql_dbg_misc     0x00010000 /* For dumping everything that is not
+                                    * not covered by upper categories
+                                    */
+
+#define QL_DBG_BUF_LEN  512