msm: kgsl: Patch in the mem pool size in the A6XX snapshot
The CP_MEM_POOL_SIZE register is cleared while dumping out the
mem pool indexed register section to stabilize it. This modifies
the mem pool data. Patch the original size in the snapshot data
to keep it consistent.
Change-Id: I3764224e07ea3bf656676a126eeda47de37b487f
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>
diff --git a/drivers/gpu/msm/adreno_a6xx_snapshot.c b/drivers/gpu/msm/adreno_a6xx_snapshot.c
index b5d7fe1..7ebf5fd 100644
--- a/drivers/gpu/msm/adreno_a6xx_snapshot.c
+++ b/drivers/gpu/msm/adreno_a6xx_snapshot.c
@@ -581,8 +581,9 @@
struct kgsl_snapshot *snapshot)
{
unsigned int pool_size;
+ u8 *buf = snapshot->ptr;
- /* Save the mempool size to 0 to stabilize it while dumping */
+ /* Set the mempool size to 0 to stabilize it while dumping */
kgsl_regread(device, A6XX_CP_MEM_POOL_SIZE, &pool_size);
kgsl_regwrite(device, A6XX_CP_MEM_POOL_SIZE, 0);
@@ -590,6 +591,22 @@
A6XX_CP_MEM_POOL_DBG_ADDR, A6XX_CP_MEM_POOL_DBG_DATA,
0, 0x2060);
+ /*
+ * Data at offset 0x2000 in the mempool section is the mempool size.
+ * Since we set it to 0, patch in the original size so that the data
+ * is consistent.
+ */
+ if (buf < snapshot->ptr) {
+ unsigned int *data;
+
+ /* Skip over the headers */
+ buf += sizeof(struct kgsl_snapshot_section_header) +
+ sizeof(struct kgsl_snapshot_indexed_regs);
+
+ data = (unsigned int *)buf + 0x2000;
+ *data = pool_size;
+ }
+
/* Restore the saved mempool size */
kgsl_regwrite(device, A6XX_CP_MEM_POOL_SIZE, pool_size);
}