gpu: nvgpu: gk20a: Allow regops lists longer than 128

Process long regops lists in 4-kB fragments, overcoming the overly
low limit of 128 reg ops per IOCTL call. Bump the list limit to 1024
and report the limit in GPU characteristics.

Bug 200248726

Change-Id: I3ad49139409f32aea8b1226d6562e88edccc8053
Signed-off-by: Sami Kiminki <skiminki@nvidia.com>
Reviewed-on: http://git-master/r/1253716
(cherry picked from commit 22314619b28f52610cb8769cd4c3f9eb01904eab)
Reviewed-on: http://git-master/r/1266652
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index d444447d..d219b815 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -890,6 +890,10 @@ struct gk20a {
         int dbg_powergating_disabled_refcount; /*refcount for pg disable */
         int dbg_timeout_disabled_refcount; /*refcount for timeout disable */
 
+        /* must have dbg_sessions_lock before use */
+        struct nvgpu_dbg_gpu_reg_op *dbg_regops_tmp_buf;
+        u32 dbg_regops_tmp_buf_ops;
+
         /*
          * When set subsequent VMAs will separate fixed and non-fixed
          * allocations. This avoids conflicts with fixed and non-fixed allocs