1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2025 Intel Corporation 4 */ 5 6 #include "abi/guc_actions_abi.h" 7 #include "xe_guc.h" 8 #include "xe_guc_ct.h" 9 #include "xe_guc_pagefault.h" 10 #include "xe_pagefault.h" 11 12 static void guc_ack_fault(struct xe_pagefault *pf, int err) 13 { 14 u32 vfid = FIELD_GET(PFD_VFID, pf->producer.msg[2]); 15 u32 engine_instance = FIELD_GET(PFD_ENG_INSTANCE, pf->producer.msg[0]); 16 u32 engine_class = FIELD_GET(PFD_ENG_CLASS, pf->producer.msg[0]); 17 u32 pdata = FIELD_GET(PFD_PDATA_LO, pf->producer.msg[0]) | 18 (FIELD_GET(PFD_PDATA_HI, pf->producer.msg[1]) << 19 PFD_PDATA_HI_SHIFT); 20 u32 action[] = { 21 XE_GUC_ACTION_PAGE_FAULT_RES_DESC, 22 23 FIELD_PREP(PFR_VALID, 1) | 24 FIELD_PREP(PFR_SUCCESS, !!err) | 25 FIELD_PREP(PFR_REPLY, PFR_ACCESS) | 26 FIELD_PREP(PFR_DESC_TYPE, FAULT_RESPONSE_DESC) | 27 FIELD_PREP(PFR_ASID, pf->consumer.asid), 28 29 FIELD_PREP(PFR_VFID, vfid) | 30 FIELD_PREP(PFR_ENG_INSTANCE, engine_instance) | 31 FIELD_PREP(PFR_ENG_CLASS, engine_class) | 32 FIELD_PREP(PFR_PDATA, pdata), 33 }; 34 struct xe_guc *guc = pf->producer.private; 35 36 xe_guc_ct_send(&guc->ct, action, ARRAY_SIZE(action), 0, 0); 37 } 38 39 static const struct xe_pagefault_ops guc_pagefault_ops = { 40 .ack_fault = guc_ack_fault, 41 }; 42 43 /** 44 * xe_guc_pagefault_handler() - G2H page fault handler 45 * @guc: GuC object 46 * @msg: G2H message 47 * @len: Length of G2H message 48 * 49 * Parse GuC to host (G2H) message into a struct xe_pagefault and forward onto 50 * the Xe page fault layer. 51 * 52 * Return: 0 on success, errno on failure 53 */ 54 int xe_guc_pagefault_handler(struct xe_guc *guc, u32 *msg, u32 len) 55 { 56 struct xe_pagefault pf; 57 int i; 58 59 #define GUC_PF_MSG_LEN_DW \ 60 (sizeof(struct xe_guc_pagefault_desc) / sizeof(u32)) 61 62 BUILD_BUG_ON(GUC_PF_MSG_LEN_DW > XE_PAGEFAULT_PRODUCER_MSG_LEN_DW); 63 64 if (len != GUC_PF_MSG_LEN_DW) 65 return -EPROTO; 66 67 pf.gt = guc_to_gt(guc); 68 69 /* 70 * XXX: These values happen to match the enum in xe_pagefault_types.h. 71 * If that changes, we’ll need to remap them here. 72 */ 73 pf.consumer.page_addr = ((u64)FIELD_GET(PFD_VIRTUAL_ADDR_HI, msg[3]) 74 << PFD_VIRTUAL_ADDR_HI_SHIFT) | 75 (FIELD_GET(PFD_VIRTUAL_ADDR_LO, msg[2]) << 76 PFD_VIRTUAL_ADDR_LO_SHIFT); 77 pf.consumer.asid = FIELD_GET(PFD_ASID, msg[1]); 78 pf.consumer.access_type = FIELD_GET(PFD_ACCESS_TYPE, msg[2]); 79 pf.consumer.fault_type = FIELD_GET(PFD_FAULT_TYPE, msg[2]); 80 if (FIELD_GET(XE2_PFD_TRVA_FAULT, msg[0])) 81 pf.consumer.fault_level = XE_PAGEFAULT_LEVEL_NACK; 82 else 83 pf.consumer.fault_level = FIELD_GET(PFD_FAULT_LEVEL, msg[0]); 84 pf.consumer.engine_class = FIELD_GET(PFD_ENG_CLASS, msg[0]); 85 pf.consumer.engine_instance = FIELD_GET(PFD_ENG_INSTANCE, msg[0]); 86 87 pf.producer.private = guc; 88 pf.producer.ops = &guc_pagefault_ops; 89 for (i = 0; i < GUC_PF_MSG_LEN_DW; ++i) 90 pf.producer.msg[i] = msg[i]; 91 92 #undef GUC_PF_MSG_LEN_DW 93 94 return xe_pagefault_handler(guc_to_xe(guc), &pf); 95 } 96