gpu: nvgpu: Hard code map_buffer_batch_limit

Add a hard coded #define for map_buffer_batch_limit and use that
insted of querying from GPU characteristics. Also add an
nvgpu_is_enabled() flag for disabling batch mapping, and set
map_buffer_batch_limit to zero if batch mapping is disabled.

JIRA NVGPU-388

Change-Id: Ic91feea638d0f47c5c22321886cfc75e97259dc3
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1593690
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/ioctl_ctrl.c b/drivers/gpu/nvgpu/common/linux/ioctl_ctrl.c
index 3c6b1b26..b77855f4 100644
--- a/drivers/gpu/nvgpu/common/linux/ioctl_ctrl.c
+++ b/drivers/gpu/nvgpu/common/linux/ioctl_ctrl.c
@@ -34,6 +34,7 @@
 
 #include "ioctl_ctrl.h"
 #include "ioctl_dbg.h"
+#include "ioctl_as.h"
 #ifdef CONFIG_TEGRA_19x_GPU
 #include "common/linux/ioctl_ctrl_t19x.h"
 #endif
@@ -209,6 +210,8 @@ gk20a_ctrl_ioctl_gpu_characteristics(
         pgpu->impl = g->params.gpu_impl;
         pgpu->rev = g->params.gpu_rev;
         pgpu->reg_ops_limit = NVGPU_IOCTL_DBG_REG_OPS_LIMIT;
+        pgpu->map_buffer_batch_limit = nvgpu_is_enabled(g, NVGPU_SUPPORT_MAP_BUFFER_BATCH) ?
+                NVGPU_IOCTL_AS_MAP_BUFFER_BATCH_LIMIT : 0;
         pgpu->twod_class = g->ops.get_litter_value(g, GPU_LIT_TWOD_CLASS);
         pgpu->threed_class = g->ops.get_litter_value(g, GPU_LIT_THREED_CLASS);
         pgpu->compute_class = g->ops.get_litter_value(g, GPU_LIT_COMPUTE_CLASS);