gru: dump chiplet state

Add support for dumpping the state of an entire GRU chiplet.

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, 33 insertions, 0 deletions

diff --git a/drivers/misc/sgi-gru/grulib.h b/drivers/misc/sgi-gru/grulib.h
index e56e196a6998..6ab872665e7f 100644
--- a/drivers/misc/sgi-gru/grulib.h
+++ b/drivers/misc/sgi-gru/grulib.h
@@ -47,6 +47,9 @@
 /* For fetching GRU chiplet status */
 #define GRU_GET_CHIPLET_STATUS          _IOWR(GRU_IOCTL_NUM, 10, void *)
 
+/* For dumpping GRU chiplet state */
+#define GRU_DUMP_CHIPLET_STATE          _IOWR(GRU_IOCTL_NUM, 11, void *)
+
 /* For user TLB flushing (primarily for tests) */
 #define GRU_USER_FLUSH_TLB              _IOWR(GRU_IOCTL_NUM, 50, void *)
 
@@ -84,6 +87,36 @@ struct gru_flush_tlb_req {
 };
 
 /*
+ * Structure used to pass TLB flush parameters to the driver
+ */
+enum {dcs_pid, dcs_gid};
+struct gru_dump_chiplet_state_req {
+        unsigned int    op;
+        int             gid;
+        int             ctxnum;
+        char            data_opt;
+        char            lock_cch;
+        pid_t           pid;
+        void            *buf;
+        size_t          buflen;
+        /* ---- output --- */
+        unsigned int    num_contexts;
+};
+
+#define GRU_DUMP_MAGIC  0x3474ab6c
+struct gru_dump_context_header {
+        unsigned int    magic;
+        unsigned char   gid;
+        unsigned char   ctxnum;
+        unsigned char   cbrcnt;
+        unsigned char   dsrcnt;
+        pid_t           pid;
+        unsigned long   vaddr;
+        int             cch_locked;
+        unsigned long   data[0];
+};
+
+/*
  * GRU configuration info (temp - for testing)
  */
 struct gru_config_info {