Mesa (master): i965: Set MAP_PERSISTENT on program cache buffers.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 8bdbc0c5b93ff97f08d302d7b634397d52620219
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8bdbc0c5b93ff97f08d302d7b634397d52620219

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Fri Jul 21 13:09:17 2017 -0700

i965: Set MAP_PERSISTENT on program cache buffers.

Chris Wilson pointed out that this mapping really is persistant.

Shouldn't actually have any effect today, but best to set it anyway.

Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 src/mesa/drivers/dri/i965/brw_program_cache.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_program_cache.c b/src/mesa/drivers/dri/i965/brw_program_cache.c
index 8a3a9f67fa..04682bef34 100644
--- a/src/mesa/drivers/dri/i965/brw_program_cache.c
+++ b/src/mesa/drivers/dri/i965/brw_program_cache.c
@@ -219,8 +219,10 @@ brw_cache_new_bo(struct brw_cache *cache, uint32_t new_size)
    new_bo = brw_bo_alloc(brw->bufmgr, "program cache", new_size, 64);
    if (can_do_exec_capture(brw->screen))
       new_bo->kflags = EXEC_OBJECT_CAPTURE;
-   if (brw->has_llc)
-      llc_map = brw_bo_map(brw, new_bo, MAP_READ | MAP_WRITE | MAP_ASYNC);
+   if (brw->has_llc) {
+      llc_map = brw_bo_map(brw, new_bo, MAP_READ | MAP_WRITE |
+                                        MAP_ASYNC | MAP_PERSISTENT);
+   }
 
    /* Copy any existing data that needs to be saved. */
    if (cache->next_offset != 0) {
@@ -416,8 +418,10 @@ brw_init_caches(struct brw_context *brw)
    cache->bo = brw_bo_alloc(brw->bufmgr, "program cache",  4096, 64);
    if (can_do_exec_capture(brw->screen))
       cache->bo->kflags = EXEC_OBJECT_CAPTURE;
-   if (brw->has_llc)
-      cache->map = brw_bo_map(brw, cache->bo, MAP_READ | MAP_WRITE | MAP_ASYNC);
+   if (brw->has_llc) {
+      cache->map = brw_bo_map(brw, cache->bo, MAP_READ | MAP_WRITE |
+                                              MAP_ASYNC | MAP_PERSISTENT);
+   }
 }
 
 static void