drm/i915/tgl: Add SFC instdone to error state

On debugging media workload hangs, sfc instdone
might prove useful in future. Be prepared.
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191029163841.5224-1-mika.kuoppala@linux.intel.com

drivers/gpu/drm/i915/i915_gpu_error.c

@@ -740,6 +740,14 @@ static void __err_print_to_sgl(struct drm_i915_error_state_buf *m,
 	if (IS_GEN(m->i915, 12))
 		err_printf(m, "AUX_ERR_DBG: 0x%08x\n", error->aux_err);
 
+	if (INTEL_GEN(m->i915) >= 12) {
+		int i;
+
+		for (i = 0; i < GEN12_SFC_DONE_MAX; i++)
+			err_printf(m, "  SFC_DONE[%d]: 0x%08x\n", i,
+				   error->sfc_done[i]);
+	}
+
 	for (ee = error->engine; ee; ee = ee->next)
 		error_print_engine(m, ee, error->capture);
 
@@ -1599,6 +1607,13 @@ static void capture_reg_state(struct i915_gpu_state *error)
 	if (IS_GEN(i915, 12))
 		error->aux_err = intel_uncore_read(uncore, GEN12_AUX_ERR_DBG);
 
+	if (INTEL_GEN(i915) >= 12) {
+		for (i = 0; i < GEN12_SFC_DONE_MAX; i++) {
+			error->sfc_done[i] =
+				intel_uncore_read(uncore, GEN12_SFC_DONE(i));
+		}
+	}
+
 	/* 4: Everything else */
 	if (INTEL_GEN(i915) >= 11) {
 		error->ier = intel_uncore_read(uncore, GEN8_DE_MISC_IER);

drivers/gpu/drm/i915/i915_gpu_error.h

@@ -75,6 +75,7 @@ struct i915_gpu_state {
 	u32 gfx_mode;
 	u32 gtt_cache;
 	u32 aux_err; /* gen12 */
+	u32 sfc_done[GEN12_SFC_DONE_MAX]; /* gen12 */
 
 	u32 nfence;
 	u64 fence[I915_MAX_NUM_FENCES];

drivers/gpu/drm/i915/i915_reg.h

@@ -413,6 +413,9 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define GEN11_VECS_SFC_USAGE(engine)		_MMIO((engine)->mmio_base + 0x2014)
 #define   GEN11_VECS_SFC_USAGE_BIT		(1 << 0)
 
+#define GEN12_SFC_DONE(n)		_MMIO(0x1cc00 + (n) * 0x100)
+#define GEN12_SFC_DONE_MAX		4
+
 #define RING_PP_DIR_BASE(base)		_MMIO((base) + 0x228)
 #define RING_PP_DIR_BASE_READ(base)	_MMIO((base) + 0x518)
 #define RING_PP_DIR_DCLV(base)		_MMIO((base) + 0x220)