1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2021 Intel Corporation 4 */ 5 6 #include "intel_guc_rc.h" 7 #include "gt/intel_gt.h" 8 #include "i915_drv.h" 9 10 static bool __guc_rc_supported(struct intel_guc *guc) 11 { 12 /* GuC RC is unavailable for pre-Gen12 */ 13 return guc->submission_supported && 14 GRAPHICS_VER(guc_to_gt(guc)->i915) >= 12; 15 } 16 17 static bool __guc_rc_selected(struct intel_guc *guc) 18 { 19 if (!intel_guc_rc_is_supported(guc)) 20 return false; 21 22 return guc->submission_selected; 23 } 24 25 void intel_guc_rc_init_early(struct intel_guc *guc) 26 { 27 guc->rc_supported = __guc_rc_supported(guc); 28 guc->rc_selected = __guc_rc_selected(guc); 29 } 30 31 static int guc_action_control_gucrc(struct intel_guc *guc, bool enable) 32 { 33 u32 rc_mode = enable ? INTEL_GUCRC_FIRMWARE_CONTROL : 34 INTEL_GUCRC_HOST_CONTROL; 35 u32 action[] = { 36 INTEL_GUC_ACTION_SETUP_PC_GUCRC, 37 rc_mode 38 }; 39 int ret; 40 41 ret = intel_guc_send(guc, action, ARRAY_SIZE(action)); 42 ret = ret > 0 ? -EPROTO : ret; 43 44 return ret; 45 } 46 47 static int __guc_rc_control(struct intel_guc *guc, bool enable) 48 { 49 struct intel_gt *gt = guc_to_gt(guc); 50 struct drm_device *drm = &guc_to_gt(guc)->i915->drm; 51 int ret; 52 53 if (!intel_uc_uses_guc_rc(>->uc)) 54 return -EOPNOTSUPP; 55 56 if (!intel_guc_is_ready(guc)) 57 return -EINVAL; 58 59 ret = guc_action_control_gucrc(guc, enable); 60 if (ret) { 61 drm_err(drm, "Failed to %s GuC RC (%pe)\n", 62 enabledisable(enable), ERR_PTR(ret)); 63 return ret; 64 } 65 66 drm_info(>->i915->drm, "GuC RC: %s\n", 67 enableddisabled(enable)); 68 69 return 0; 70 } 71 72 int intel_guc_rc_enable(struct intel_guc *guc) 73 { 74 return __guc_rc_control(guc, true); 75 } 76 77 int intel_guc_rc_disable(struct intel_guc *guc) 78 { 79 return __guc_rc_control(guc, false); 80 } 81