gpu: nvgpu: Remove extra CPU flushes in sim_gk20a.c

Simulation does not model CPU caches, so remove extra CPU flushes.
The flushes are defined only in Tegra Linux kernel, so they cause
build errors on other kernels.

Change-Id: I5530a9ea8beac4b7c1ac30f32524afa418110daf
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1607582
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 9 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/sim.c b/drivers/gpu/nvgpu/common/linux/sim.c
index b7481784..0e158063 100644
--- a/drivers/gpu/nvgpu/common/linux/sim.c
+++ b/drivers/gpu/nvgpu/common/linux/sim.c
@@ -179,10 +179,6 @@ static int rpc_send_message(struct gk20a *g)
         g->sim->send_ring_put = (g->sim->send_ring_put + 2 * sizeof(u32)) %
                 PAGE_SIZE;
 
-        __cpuc_flush_dcache_area(sim_linux->msg_bfr.kvaddr, PAGE_SIZE);
-        __cpuc_flush_dcache_area(sim_linux->send_bfr.kvaddr, PAGE_SIZE);
-        __cpuc_flush_dcache_area(sim_linux->recv_bfr.kvaddr, PAGE_SIZE);
-
         /* Update the put pointer. This will trap into the host. */
         sim_writel(sim_linux, sim_send_put_r(), g->sim->send_ring_put);
 
@@ -234,10 +230,6 @@ static int rpc_recv_poll(struct gk20a *g)
                 g->sim->recv_ring_get = (g->sim->recv_ring_get + 2*sizeof(u32)) %
                         PAGE_SIZE;
 
-                __cpuc_flush_dcache_area(sim_linux->msg_bfr.kvaddr, PAGE_SIZE);
-                __cpuc_flush_dcache_area(sim_linux->send_bfr.kvaddr, PAGE_SIZE);
-                __cpuc_flush_dcache_area(sim_linux->recv_bfr.kvaddr, PAGE_SIZE);
-
                 sim_writel(sim_linux, sim_recv_get_r(), g->sim->recv_ring_get);
 
                 g->sim->recv_ring_put = sim_readl(sim_linux, sim_recv_put_r());
@@ -362,4 +354,4 @@ int gk20a_init_sim_support(struct gk20a *g)
  fail:
         gk20a_free_sim_support(g);
         return err;
-}
\ No newline at end of file
+}