gpu: nvgpu: add tsg_verify_status_faulted operation

Add new API gv11b_fifo_tsg_verify_status_faulted() and use that as
g->ops.fifo.tsg_verify_status_faulted operation for gv11b/gv100

This API will check if channel has ENG_FAULTED status set, if yes it will clear
CE method buffer in case saved out channel is same as faulted channel
We need to write 0 to method count to invalidate CE method buffer

Also set g->ops.fifo.tsg_verify_status_ctx_reload operation for gv11b/gv100

Bug 200327095

Change-Id: I9d2b0f13faf881b30680219bbcadfd4969c4dff6
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1560643
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/fifo_gv11b.c b/drivers/gpu/nvgpu/gv11b/fifo_gv11b.c
index 1d5e593c..b4e4b875 100644
--- a/drivers/gpu/nvgpu/gv11b/fifo_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/fifo_gv11b.c
@@ -1811,3 +1811,38 @@ void gv11b_mmu_fault_id_to_eng_pbdma_id_and_veid(struct gk20a *g,
         else
                 *pbdma_id = FIFO_INVAL_PBDMA_ID;
 }
+
+static bool gk20a_fifo_channel_status_is_eng_faulted(struct gk20a *g, u32 chid)
+{
+        u32 channel = gk20a_readl(g, ccsr_channel_r(chid));
+
+        return ccsr_channel_eng_faulted_v(channel) ==
+                ccsr_channel_eng_faulted_true_v();
+}
+
+void gv11b_fifo_tsg_verify_status_faulted(struct channel_gk20a *ch)
+{
+        struct gk20a *g = ch->g;
+        struct tsg_gk20a *tsg = &g->fifo.tsg[ch->tsgid];
+
+        /*
+         * If channel has FAULTED set, clear the CE method buffer
+         * if saved out channel is same as faulted channel
+         */
+        if (!gk20a_fifo_channel_status_is_eng_faulted(g, ch->chid))
+                return;
+
+        if (tsg->eng_method_buffers == NULL)
+                return;
+
+        /*
+         * CE method buffer format :
+         * DWord0 = method count
+         * DWord1 = channel id
+         *
+         * It is sufficient to write 0 to method count to invalidate
+         */
+        if ((u32)ch->chid ==
+            nvgpu_mem_rd32(g, &tsg->eng_method_buffers[ASYNC_CE_RUNQUE], 1))
+                nvgpu_mem_wr32(g, &tsg->eng_method_buffers[ASYNC_CE_RUNQUE], 0, 0);
+}