sgi-gru: macro for scanning all gru chiplets

Add macro for scanning all active GRU chiplets.  Maximum chiplet id is
saved during GRU initialization.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
index f8dcdb1a0ec4..b7a21ce91496 100644
--- a/drivers/misc/sgi-gru/grufile.c
+++ b/drivers/misc/sgi-gru/grufile.c
@@ -47,6 +47,7 @@
 struct gru_blade_state *gru_base[GRU_MAX_BLADES] __read_mostly;
 unsigned long gru_start_paddr __read_mostly;
 unsigned long gru_end_paddr __read_mostly;
+unsigned int gru_max_gids __read_mostly;
 struct gru_stats_s gru_stats;
 
 /* Guaranteed user available resources on each node */
@@ -276,6 +277,8 @@ static void gru_init_chiplet(struct gru_state *gru, unsigned long paddr,
         gru->gs_dsr_map = (1UL << GRU_DSR_AU) - 1;
         gru->gs_asid_limit = MAX_ASID;
         gru_tgh_flush_init(gru);
+        if (gru->gs_gid >= gru_max_gids)
+                gru_max_gids = gru->gs_gid + 1;
         gru_dbg(grudev, "bid %d, nid %d, gid %d, vaddr %p (0x%lx)\n",
                 bid, nid, gru->gs_gid, gru->gs_gru_base_vaddr,
                 gru->gs_gru_base_paddr);