commit aaf2a859b6758ad9b3a6fa242b0453bd7d8b7615
author Hannes Reinecke <hare@suse.de> Wed Oct 29 13:00:14 2014 +0100
committer Paolo Bonzini <pbonzini@redhat.com> Fri Oct 31 11:29:01 2014 +0100
tree 6f38669ddf02a8474ec92116c3ddfc36f8295484
parent 200b6966cdd393045ef042f0777faf660115ab22

megasas: Update queue logging

Improve queue logging by displaying head and tail pointer
of the completion queue.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/scsi/megasas.c

diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index dcfef63..3107445 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -527,8 +527,12 @@
     cmd->count = count;
     s->busy++;
 
+    if (s->consumer_pa) {
+        s->reply_queue_tail = ldl_le_phys(&address_space_memory,
+                                          s->consumer_pa);
+    }
     trace_megasas_qf_enqueue(cmd->index, cmd->count, cmd->context,
-                             s->reply_queue_head, s->busy);
+                             s->reply_queue_head, s->reply_queue_tail, s->busy);
 
     return cmd;
 }
@@ -558,8 +562,10 @@
                         s->reply_queue_pa + queue_offset, context);
         }
         s->reply_queue_head = megasas_next_index(s, tail, s->fw_cmds);
-        trace_megasas_qf_complete(context, tail, queue_offset,
-                                  s->busy, s->doorbell);
+        s->reply_queue_tail = ldl_le_phys(&address_space_memory,
+                                          s->consumer_pa);
+        trace_megasas_qf_complete(context, s->reply_queue_head,
+                                  s->reply_queue_tail, s->busy, s->doorbell);
     }
 
     if (megasas_intr_enabled(s)) {
@@ -1649,7 +1655,6 @@
                                bool is_logical)
 {
     uint8_t *cdb;
-    int len;
     bool is_write;
     struct SCSIDevice *sdev = NULL;
 
@@ -1710,16 +1715,16 @@
     }
 
     is_write = (cmd->req->cmd.mode == SCSI_XFER_TO_DEV);
-    len = megasas_enqueue_req(cmd, is_write);
-    if (len > 0) {
+    if (cmd->iov_size) {
         if (is_write) {
-            trace_megasas_scsi_write_start(cmd->index, len);
+            trace_megasas_scsi_write_start(cmd->index, cmd->iov_size);
         } else {
-            trace_megasas_scsi_read_start(cmd->index, len);
+            trace_megasas_scsi_read_start(cmd->index, cmd->iov_size);
         }
     } else {
         trace_megasas_scsi_nodata(cmd->index);
     }
+    megasas_enqueue_req(cmd, is_write);
     return MFI_STAT_INVALID_STATUS;
 }
 
@@ -2106,7 +2111,10 @@
         s->doorbell = 0;
         if (s->producer_pa && megasas_intr_enabled(s)) {
             /* Update reply queue pointer */
-            trace_megasas_qf_update(s->reply_queue_head, s->busy);
+            s->reply_queue_tail = ldl_le_phys(&address_space_memory,
+                                              s->consumer_pa);
+            trace_megasas_qf_update(s->reply_queue_head, s->reply_queue_tail,
+                                    s->busy);
             stl_le_phys(&address_space_memory,
                         s->producer_pa, s->reply_queue_head);
             if (!msix_enabled(pci_dev)) {