Revert "gpu: nvgpu: Get coherency on gv100 + NVLINK working"

Also revert other changes related to IO coherence. This may be the
culprit in a recent dev-kernel lockdown.

Bug 2070609

Change-Id: Ida178aef161fadbc6db9512521ea51c702c1564b
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1665914
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Srikar Srimath Tirumala <srikars@nvidia.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/pmu_gv11b.c b/drivers/gpu/nvgpu/gv11b/pmu_gv11b.c
index 13e70eca..7dd4f8f4 100644
--- a/drivers/gpu/nvgpu/gv11b/pmu_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/pmu_gv11b.c
@@ -195,11 +195,9 @@ int gv11b_pmu_bootstrap(struct nvgpu_pmu *pmu)
 
         gk20a_writel(g, pwr_pmu_new_instblk_r(),
                 pwr_pmu_new_instblk_ptr_f(
-                nvgpu_inst_block_addr(g, &mm->pmu.inst_block) >> ALIGN_4KB) |
-                     pwr_pmu_new_instblk_valid_f(1) |
-                     (nvgpu_is_enabled(g, NVGPU_USE_COHERENT_SYSMEM) ?
-                      pwr_pmu_new_instblk_target_sys_coh_f() :
-                      pwr_pmu_new_instblk_target_sys_ncoh_f()));
+                nvgpu_inst_block_addr(g, &mm->pmu.inst_block) >> ALIGN_4KB)
+                | pwr_pmu_new_instblk_valid_f(1)
+                | pwr_pmu_new_instblk_target_sys_ncoh_f());
 
         /* TBD: load all other surfaces */
         g->ops.pmu_ver.set_pmu_cmdline_args_trace_size(