1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2021 Intel Corporation 4 */ 5 #ifndef _XE_LRC_H_ 6 #define _XE_LRC_H_ 7 8 #include <linux/types.h> 9 10 #include "xe_lrc_types.h" 11 12 struct drm_printer; 13 struct xe_bb; 14 struct xe_device; 15 struct xe_exec_queue; 16 enum xe_engine_class; 17 struct xe_gt; 18 struct xe_hw_engine; 19 struct xe_lrc; 20 struct xe_lrc_snapshot; 21 struct xe_vm; 22 23 #define LRC_PPHWSP_SCRATCH_ADDR (0x34 * 4) 24 25 struct xe_lrc *xe_lrc_create(struct xe_hw_engine *hwe, struct xe_vm *vm, 26 u32 ring_size); 27 void xe_lrc_destroy(struct kref *ref); 28 29 /** 30 * xe_lrc_get - Get reference to the LRC 31 * @lrc: Logical Ring Context 32 * 33 * Increment reference count of @lrc 34 */ 35 static inline struct xe_lrc *xe_lrc_get(struct xe_lrc *lrc) 36 { 37 kref_get(&lrc->refcount); 38 return lrc; 39 } 40 41 /** 42 * xe_lrc_put - Put reference of the LRC 43 * @lrc: Logical Ring Context 44 * 45 * Decrement reference count of @lrc, call xe_lrc_destroy when 46 * reference count reaches 0. 47 */ 48 static inline void xe_lrc_put(struct xe_lrc *lrc) 49 { 50 kref_put(&lrc->refcount, xe_lrc_destroy); 51 } 52 53 size_t xe_gt_lrc_size(struct xe_gt *gt, enum xe_engine_class class); 54 u32 xe_lrc_pphwsp_offset(struct xe_lrc *lrc); 55 56 void xe_lrc_set_ring_tail(struct xe_lrc *lrc, u32 tail); 57 u32 xe_lrc_ring_tail(struct xe_lrc *lrc); 58 void xe_lrc_set_ring_head(struct xe_lrc *lrc, u32 head); 59 u32 xe_lrc_ring_head(struct xe_lrc *lrc); 60 u32 xe_lrc_ring_space(struct xe_lrc *lrc); 61 void xe_lrc_write_ring(struct xe_lrc *lrc, const void *data, size_t size); 62 63 u32 xe_lrc_indirect_ring_ggtt_addr(struct xe_lrc *lrc); 64 u32 xe_lrc_ggtt_addr(struct xe_lrc *lrc); 65 u32 *xe_lrc_regs(struct xe_lrc *lrc); 66 67 u32 xe_lrc_read_ctx_reg(struct xe_lrc *lrc, int reg_nr); 68 void xe_lrc_write_ctx_reg(struct xe_lrc *lrc, int reg_nr, u32 val); 69 70 u64 xe_lrc_descriptor(struct xe_lrc *lrc); 71 72 u32 xe_lrc_seqno_ggtt_addr(struct xe_lrc *lrc); 73 struct dma_fence *xe_lrc_alloc_seqno_fence(void); 74 void xe_lrc_free_seqno_fence(struct dma_fence *fence); 75 void xe_lrc_init_seqno_fence(struct xe_lrc *lrc, struct dma_fence *fence); 76 s32 xe_lrc_seqno(struct xe_lrc *lrc); 77 78 u32 xe_lrc_start_seqno_ggtt_addr(struct xe_lrc *lrc); 79 s32 xe_lrc_start_seqno(struct xe_lrc *lrc); 80 81 u32 xe_lrc_parallel_ggtt_addr(struct xe_lrc *lrc); 82 struct iosys_map xe_lrc_parallel_map(struct xe_lrc *lrc); 83 84 size_t xe_lrc_skip_size(struct xe_device *xe); 85 86 void xe_lrc_dump_default(struct drm_printer *p, 87 struct xe_gt *gt, 88 enum xe_engine_class); 89 90 void xe_lrc_emit_hwe_state_instructions(struct xe_exec_queue *q, struct xe_bb *bb); 91 92 struct xe_lrc_snapshot *xe_lrc_snapshot_capture(struct xe_lrc *lrc); 93 void xe_lrc_snapshot_capture_delayed(struct xe_lrc_snapshot *snapshot); 94 void xe_lrc_snapshot_print(struct xe_lrc_snapshot *snapshot, struct drm_printer *p); 95 void xe_lrc_snapshot_free(struct xe_lrc_snapshot *snapshot); 96 97 /** 98 * xe_lrc_update_timestamp - readout LRC timestamp and update cached value 99 * @lrc: logical ring context for this exec queue 100 * @old_ts: pointer where to save the previous timestamp 101 * 102 * Read the current timestamp for this LRC and update the cached value. The 103 * previous cached value is also returned in @old_ts so the caller can calculate 104 * the delta between 2 updates. Note that this is not intended to be called from 105 * any place, but just by the paths updating the drm client utilization. 106 * 107 * Returns the current LRC timestamp 108 */ 109 u32 xe_lrc_update_timestamp(struct xe_lrc *lrc, u32 *old_ts); 110 111 #endif 112