gpu: pvr: pdumpfs: add stream offset tracking

Track the size of the stored data, this is split in start and end,
so that the next commit can use the start and end to read out the
stream correctly, even with vanishing frames (where the missing
data can be clearly marked).

Signed-off-by: Luc Verhaegen <libv@codethink.co.uk>
Signed-off-by: Imre Deak <imre.deak@nokia.com>

diff --git a/pvr/pvr_pdumpfs.c b/pvr/pvr_pdumpfs.c
index 931319d..651f4f9 100644 (file)
--- a/pvr/pvr_pdumpfs.c
+++ b/pvr/pvr_pdumpfs.c
@@ -66,6 +66,9 @@ static struct pdumpfs_frame *frame_current;
 static struct pdumpfs_frame *frame_current_debugfs;
 static int frame_current_open_count;
 
+static loff_t stream_start;
+static loff_t stream_end;
+
 static struct pdumpfs_frame *
 frame_create(void)
 {
@@ -119,6 +122,9 @@ frame_destroy_all(void)
                frame_destroy(frame);
                frame_count--;
        }
+
+       stream_start = 0;
+       stream_end = 0;
 }
 
 static void
@@ -130,6 +136,8 @@ frame_cull(void)
                frame_stream = frame->next;
                frame->next = NULL;
 
+               stream_end -= frame->offset;
+
                /*
                 * we cannot have frames vanish in the middle of reading
                 * them through debugfs
@@ -309,6 +317,8 @@ pdumpfs_write_data(void *buffer, size_t size, bool from_user)
        mutex_lock(pdumpfs_mutex);
 
        size = pdumpfs_frame_write(buffer, size, from_user);
+       if ((size > 0) && (frame_current != frame_init))
+               stream_end += size;
 
        mutex_unlock(pdumpfs_mutex);
 
@@ -321,9 +331,13 @@ pdumpfs_write_data(void *buffer, size_t size, bool from_user)
 void
 pdumpfs_write_string(char *string)
 {
+       size_t size;
+
        mutex_lock(pdumpfs_mutex);
 
-       pdumpfs_frame_write(string, strlen(string), false);
+       size = pdumpfs_frame_write(string, strlen(string), false);
+       if ((size > 0) && (frame_current != frame_init))
+               stream_end += size;
 
        mutex_unlock(pdumpfs_mutex);
 }