gpu: nvgu: use API to check for valid memory

Use API nvgpu_mem_is_valid() to check if buffers are allocated or not
instead of directly accessing linux specific sg_table

Jira NVGPU-416

Change-Id: I83da79f4a57ec5a765f32c69bf76e708753e11fb
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1604587
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 16 insertions, 16 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
index 82695e44..270d36d6 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.c
@@ -2613,13 +2613,13 @@ static int gr_gk20a_map_global_ctx_buffers(struct gk20a *g,
         gk20a_dbg_fn("");
 
         /* Circular Buffer */
-        if (!c->vpr ||
-            (gr->global_ctx_buffer[CIRCULAR_VPR].mem.priv.sgt == NULL)) {
-                mem = &gr->global_ctx_buffer[CIRCULAR].mem;
-                g_bfr_index[CIRCULAR_VA] = CIRCULAR;
-        } else {
+        if (c->vpr &&
+            nvgpu_mem_is_valid(&gr->global_ctx_buffer[CIRCULAR_VPR].mem)) {
                 mem = &gr->global_ctx_buffer[CIRCULAR_VPR].mem;
                 g_bfr_index[CIRCULAR_VA] = CIRCULAR_VPR;
+        } else {
+                mem = &gr->global_ctx_buffer[CIRCULAR].mem;
+                g_bfr_index[CIRCULAR_VA] = CIRCULAR;
         }
 
         gpu_va = nvgpu_gmmu_map(ch_vm, mem, mem->size,
@@ -2631,13 +2631,13 @@ static int gr_gk20a_map_global_ctx_buffers(struct gk20a *g,
         g_bfr_size[CIRCULAR_VA] = mem->size;
 
         /* Attribute Buffer */
-        if (!c->vpr ||
-            (gr->global_ctx_buffer[ATTRIBUTE_VPR].mem.priv.sgt == NULL)) {
-                mem = &gr->global_ctx_buffer[ATTRIBUTE].mem;
-                g_bfr_index[ATTRIBUTE_VA] = ATTRIBUTE;
-        } else {
+        if (c->vpr &&
+            nvgpu_mem_is_valid(&gr->global_ctx_buffer[ATTRIBUTE_VPR].mem)) {
                 mem = &gr->global_ctx_buffer[ATTRIBUTE_VPR].mem;
                 g_bfr_index[ATTRIBUTE_VA] = ATTRIBUTE_VPR;
+        } else {
+                mem = &gr->global_ctx_buffer[ATTRIBUTE].mem;
+                g_bfr_index[ATTRIBUTE_VA] = ATTRIBUTE;
         }
 
         gpu_va = nvgpu_gmmu_map(ch_vm, mem, mem->size,
@@ -2649,13 +2649,13 @@ static int gr_gk20a_map_global_ctx_buffers(struct gk20a *g,
         g_bfr_size[ATTRIBUTE_VA] = mem->size;
 
         /* Page Pool */
-        if (!c->vpr ||
-            (gr->global_ctx_buffer[PAGEPOOL_VPR].mem.priv.sgt == NULL)) {
-                mem = &gr->global_ctx_buffer[PAGEPOOL].mem;
-                g_bfr_index[PAGEPOOL_VA] = PAGEPOOL;
-        } else {
+        if (c->vpr &&
+            nvgpu_mem_is_valid(&gr->global_ctx_buffer[PAGEPOOL_VPR].mem)) {
                 mem = &gr->global_ctx_buffer[PAGEPOOL_VPR].mem;
                 g_bfr_index[PAGEPOOL_VA] = PAGEPOOL_VPR;
+        } else {
+                mem = &gr->global_ctx_buffer[PAGEPOOL].mem;
+                g_bfr_index[PAGEPOOL_VA] = PAGEPOOL;
         }
 
         gpu_va = nvgpu_gmmu_map(ch_vm, mem, mem->size,
@@ -2960,7 +2960,7 @@ int gk20a_alloc_obj_ctx(struct channel_gk20a  *c, u32 class_num, u32 flags)
         }
 
         /* allocate patch buffer */
-        if (ch_ctx->patch_ctx.mem.priv.sgt == NULL) {
+        if (!nvgpu_mem_is_valid(&ch_ctx->patch_ctx.mem)) {
                 ch_ctx->patch_ctx.data_count = 0;
                 err = gr_gk20a_alloc_channel_patch_ctx(g, c);
                 if (err) {