esp_scsi: debug event and command

Add new debug definitions for event and command logging.
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

drivers/scsi/esp_scsi.c

@@ -49,6 +49,8 @@ static u32 esp_debug;
 #define ESP_DEBUG_DATADONE	0x00000100
 #define ESP_DEBUG_RECONNECT	0x00000200
 #define ESP_DEBUG_AUTOSENSE	0x00000400
+#define ESP_DEBUG_EVENT		0x00000800
+#define ESP_DEBUG_COMMAND	0x00001000
 
 #define esp_log_intr(f, a...) \
 do {	if (esp_debug & ESP_DEBUG_INTR) \
@@ -100,6 +102,16 @@ do {	if (esp_debug & ESP_DEBUG_AUTOSENSE) \
 		shost_printk(KERN_DEBUG, esp->host, f, ## a);	\
 } while (0)
 
+#define esp_log_event(f, a...) \
+do {   if (esp_debug & ESP_DEBUG_EVENT)	\
+		shost_printk(KERN_DEBUG, esp->host, f, ## a);	\
+} while (0)
+
+#define esp_log_command(f, a...) \
+do {   if (esp_debug & ESP_DEBUG_COMMAND)	\
+		shost_printk(KERN_DEBUG, esp->host, f, ## a);	\
+} while (0)
+
 #define esp_read8(REG)		esp->ops->esp_read8(esp, REG)
 #define esp_write8(VAL,REG)	esp->ops->esp_write8(esp, VAL, REG)
 
@@ -126,6 +138,7 @@ void scsi_esp_cmd(struct esp *esp, u8 val)
 
 	esp->esp_event_cur = (idx + 1) & (ESP_EVENT_LOG_SZ - 1);
 
+	esp_log_command("cmd[%02x]\n", val);
 	esp_write8(val, ESP_CMD);
 }
 EXPORT_SYMBOL(scsi_esp_cmd);
@@ -1638,6 +1651,8 @@ static int esp_process_event(struct esp *esp)
 
 again:
 	write = 0;
+	esp_log_event("process event %d phase %x\n",
+		      esp->event, esp->sreg & ESP_STAT_PMASK);
 	switch (esp->event) {
 	case ESP_EVENT_CHECK_PHASE:
 		switch (esp->sreg & ESP_STAT_PMASK) {