gpu: nvgpu: Nvgpu abstraction for linux barriers.

construct wrapper nvgpu_* methods to replace
mb,rmb,wmb,smp_mb,smp_rmb,smp_wmb,read_barrier_depends and
smp_read_barrier_depends.

NVGPU-122

Change-Id: I8d24dd70fef5cb0fadaacc15f3ab11531667a0df
Signed-off-by: Debarshi <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1541199
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sourab Gupta <sourabg@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c b/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c
index c8519905..3f03e25a 100644
--- a/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c
@@ -20,6 +20,7 @@
 #include <nvgpu/dma.h>
 #include <nvgpu/atomic.h>
 #include <nvgpu/bug.h>
+#include <nvgpu/barrier.h>
 
 #include "vgpu/vgpu.h"
 #include "gk20a/ctxsw_trace_gk20a.h"
@@ -42,7 +43,7 @@ static void vgpu_channel_bind(struct channel_gk20a *ch)
         err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
         WARN_ON(err || msg.ret);
 
-        wmb();
+        nvgpu_smp_wmb();
         nvgpu_atomic_set(&ch->bound, true);
 }
 
@@ -370,7 +371,7 @@ static int vgpu_init_fifo_setup_hw(struct gk20a *g)
                 v = gk20a_bar1_readl(g, bar1_vaddr);
 
                 *cpu_vaddr = v1;
-                smp_mb();
+                nvgpu_smp_mb();
 
                 if (v1 != gk20a_bar1_readl(g, bar1_vaddr)) {
                         nvgpu_err(g, "bar1 broken @ gk20a!");
@@ -728,7 +729,7 @@ static void vgpu_fifo_set_ctx_mmu_error(struct gk20a *g,
 
         /* mark channel as faulted */
         ch->has_timedout = true;
-        wmb();
+        nvgpu_smp_wmb();
         /* unblock pending waits */
         nvgpu_cond_broadcast_interruptible(&ch->semaphore_wq);
         nvgpu_cond_broadcast_interruptible(&ch->notifier_wq);