gpu: nvgpu: debugfs node to enable/disable ltc_illegal_compstat intr

Added debugfs node under ltc directory with name:
intr_illegal_compstat_enable

Enabling/disabling of ltc_illegal_compstat intr is
possible through debugfs node.

Since ltc state is lost with rail gate, this setting is
cached and will be populated during ltc initialization.

Bug 2099406

Change-Id: I4bf62228dfd2bbb94f87f923f9f4f6e5ad0b07f0
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1774683
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 22 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/ltc_gv11b.c b/drivers/gpu/nvgpu/gv11b/ltc_gv11b.c
index 3cea4cd4..a040de23 100644
--- a/drivers/gpu/nvgpu/gv11b/ltc_gv11b.c
+++ b/drivers/gpu/nvgpu/gv11b/ltc_gv11b.c
@@ -70,10 +70,13 @@ void gv11b_ltc_init_fs_state(struct gk20a *g)
         /* Disable LTC interrupts */
         reg = gk20a_readl(g, ltc_ltcs_ltss_intr_r());
         reg &= ~ltc_ltcs_ltss_intr_en_evicted_cb_m();
-        reg &= ~ltc_ltcs_ltss_intr_en_illegal_compstat_m();
         reg &= ~ltc_ltcs_ltss_intr_en_illegal_compstat_access_m();
         nvgpu_writel_check(g, ltc_ltcs_ltss_intr_r(), reg);
 
+        if (g->ops.ltc.intr_en_illegal_compstat)
+                g->ops.ltc.intr_en_illegal_compstat(g,
+                                        g->ltc_intr_en_illegal_compstat);
+
         /* Enable ECC interrupts */
         ltc_intr = gk20a_readl(g, ltc_ltcs_ltss_intr_r());
         ltc_intr |= ltc_ltcs_ltss_intr_en_ecc_sec_error_enabled_f() |
@@ -82,6 +85,24 @@ void gv11b_ltc_init_fs_state(struct gk20a *g)
                                 ltc_intr);
 }
 
+void gv11b_ltc_intr_en_illegal_compstat(struct gk20a *g, bool enable)
+{
+        u32 val;
+
+        /* disble/enble illegal_compstat interrupt */
+        val = gk20a_readl(g, ltc_ltcs_ltss_intr_r());
+        if (enable)
+                val = set_field(val,
+                        ltc_ltcs_ltss_intr_en_illegal_compstat_m(),
+                        ltc_ltcs_ltss_intr_en_illegal_compstat_enabled_f());
+        else
+                val = set_field(val,
+                        ltc_ltcs_ltss_intr_en_illegal_compstat_m(),
+                        ltc_ltcs_ltss_intr_en_illegal_compstat_disabled_f());
+        gk20a_writel(g, ltc_ltcs_ltss_intr_r(), val);
+}
+
+
 void gv11b_ltc_isr(struct gk20a *g)
 {
         u32 mc_intr, ltc_intr3;