drm/i915/guc: Early initialization of GuC send registers

Base offset and count of the GuC scratch registers, used for
sending MMIO messages to GuC, can be initialized earlier with
other GuC members that also depends on platform.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210603051630.2635-20-matthew.brost@intel.com

Author: mwajdecz

drivers/gpu/drm/i915/gt/uc/intel_guc.c

@@ -60,15 +60,8 @@ void intel_guc_init_send_regs(struct intel_guc *guc)
 	enum forcewake_domains fw_domains = 0;
 	unsigned int i;
 
-	if (INTEL_GEN(gt->i915) >= 11) {
-		guc->send_regs.base =
-				i915_mmio_reg_offset(GEN11_SOFT_SCRATCH(0));
-		guc->send_regs.count = GEN11_SOFT_SCRATCH_COUNT;
-	} else {
-		guc->send_regs.base = i915_mmio_reg_offset(SOFT_SCRATCH(0));
-		guc->send_regs.count = GUC_MAX_MMIO_MSG_LEN;
-		BUILD_BUG_ON(GUC_MAX_MMIO_MSG_LEN > SOFT_SCRATCH_COUNT);
-	}
+	GEM_BUG_ON(!guc->send_regs.base);
+	GEM_BUG_ON(!guc->send_regs.count);
 
 	for (i = 0; i < guc->send_regs.count; i++) {
 		fw_domains |= intel_uncore_forcewake_for_reg(gt->uncore,
@@ -172,11 +165,18 @@ void intel_guc_init_early(struct intel_guc *guc)
 		guc->interrupts.reset = gen11_reset_guc_interrupts;
 		guc->interrupts.enable = gen11_enable_guc_interrupts;
 		guc->interrupts.disable = gen11_disable_guc_interrupts;
+		guc->send_regs.base =
+			i915_mmio_reg_offset(GEN11_SOFT_SCRATCH(0));
+		guc->send_regs.count = GEN11_SOFT_SCRATCH_COUNT;
+
 	} else {
 		guc->notify_reg = GUC_SEND_INTERRUPT;
 		guc->interrupts.reset = gen9_reset_guc_interrupts;
 		guc->interrupts.enable = gen9_enable_guc_interrupts;
 		guc->interrupts.disable = gen9_disable_guc_interrupts;
+		guc->send_regs.base = i915_mmio_reg_offset(SOFT_SCRATCH(0));
+		guc->send_regs.count = GUC_MAX_MMIO_MSG_LEN;
+		BUILD_BUG_ON(GUC_MAX_MMIO_MSG_LEN > SOFT_SCRATCH_COUNT);
 	}
 }