i965/batch: don't ignore the 'brw_new_batch' call for a 'new batch'

If we restore the 'new batch' using 'intel_batchbuffer_reset_to_saved'
function we must restore the default state of the batch using
'brw_new_batch' function because the 'intel_batchbuffer_flush'
function will not do it for the 'new batch' again.
At least the following fields of the batch
'state_base_address_emitted','aperture_space', 'state_used'
should be restored to default values to avoid:
1. the aperture_space overflow
2. the missed STATE_BASE_ADDRESS commad in the batch
3. the memory overconsumption of the 'statebuffer'
   due to uncleared 'state_used' field.
etc.

v2: merge with new commits, changes was minimized, added the 'fixes' tag
v3: added in to patch series

Fixes: 3faf56ffbdeb "intel: Add an interface for saving/restoring
                     the batchbuffer state."
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107626
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/intel_batchbuffer.c b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
index 2dc6eb80b1a4f5de97239121e9e16005ee296ce1..6207de5a06f11a6f29f7d32bac0f4e8d29ee3b8f 100644 (file)
--- a/src/mesa/drivers/dri/i965/intel_batchbuffer.c
+++ b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
@@ -55,6 +55,8 @@
 
 static void
 intel_batchbuffer_reset(struct brw_context *brw);
+static void
+brw_new_batch(struct brw_context *brw);
 
 static void
 dump_validation_list(struct intel_batchbuffer *batch)
@@ -318,6 +320,8 @@ intel_batchbuffer_reset_to_saved(struct brw_context *brw)
    brw->batch.exec_count = brw->batch.saved.exec_count;
 
    brw->batch.map_next = brw->batch.saved.map_next;
+   if (USED_BATCH(brw->batch) == 0)
+      brw_new_batch(brw);
 }
 
 void