1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2021 Intel Corporation 4 */ 5 6 #include <linux/string_helpers.h> 7 8 #include "intel_guc_rc.h" 9 #include "gt/intel_gt.h" 10 #include "i915_drv.h" 11 12 static bool __guc_rc_supported(struct intel_guc *guc) 13 { 14 /* GuC RC is unavailable for pre-Gen12 */ 15 return guc->submission_supported && 16 GRAPHICS_VER(guc_to_gt(guc)->i915) >= 12; 17 } 18 19 static bool __guc_rc_selected(struct intel_guc *guc) 20 { 21 if (!intel_guc_rc_is_supported(guc)) 22 return false; 23 24 return guc->submission_selected; 25 } 26 27 void intel_guc_rc_init_early(struct intel_guc *guc) 28 { 29 guc->rc_supported = __guc_rc_supported(guc); 30 guc->rc_selected = __guc_rc_selected(guc); 31 } 32 33 static int guc_action_control_gucrc(struct intel_guc *guc, bool enable) 34 { 35 u32 rc_mode = enable ? INTEL_GUCRC_FIRMWARE_CONTROL : 36 INTEL_GUCRC_HOST_CONTROL; 37 u32 action[] = { 38 INTEL_GUC_ACTION_SETUP_PC_GUCRC, 39 rc_mode 40 }; 41 int ret; 42 43 ret = intel_guc_send(guc, action, ARRAY_SIZE(action)); 44 ret = ret > 0 ? -EPROTO : ret; 45 46 return ret; 47 } 48 49 static int __guc_rc_control(struct intel_guc *guc, bool enable) 50 { 51 struct intel_gt *gt = guc_to_gt(guc); 52 struct drm_device *drm = &guc_to_gt(guc)->i915->drm; 53 int ret; 54 55 if (!intel_uc_uses_guc_rc(>->uc)) 56 return -EOPNOTSUPP; 57 58 if (!intel_guc_is_ready(guc)) 59 return -EINVAL; 60 61 ret = guc_action_control_gucrc(guc, enable); 62 if (ret) { 63 drm_err(drm, "Failed to %s GuC RC (%pe)\n", 64 str_enable_disable(enable), ERR_PTR(ret)); 65 return ret; 66 } 67 68 drm_info(>->i915->drm, "GuC RC: %s\n", 69 str_enabled_disabled(enable)); 70 71 return 0; 72 } 73 74 int intel_guc_rc_enable(struct intel_guc *guc) 75 { 76 return __guc_rc_control(guc, true); 77 } 78 79 int intel_guc_rc_disable(struct intel_guc *guc) 80 { 81 return __guc_rc_control(guc, false); 82 } 83