1 /* 2 * SPDX-License-Identifier: MIT 3 * 4 * Copyright © 2018 Intel Corporation 5 */ 6 #include "gt/intel_gt.h" 7 8 #include "gem/selftests/igt_gem_utils.h" 9 10 #include "igt_spinner.h" 11 12 int igt_spinner_init(struct igt_spinner *spin, struct intel_gt *gt) 13 { 14 unsigned int mode; 15 void *vaddr; 16 int err; 17 18 memset(spin, 0, sizeof(*spin)); 19 spin->gt = gt; 20 21 spin->hws = i915_gem_object_create_internal(gt->i915, PAGE_SIZE); 22 if (IS_ERR(spin->hws)) { 23 err = PTR_ERR(spin->hws); 24 goto err; 25 } 26 27 spin->obj = i915_gem_object_create_internal(gt->i915, PAGE_SIZE); 28 if (IS_ERR(spin->obj)) { 29 err = PTR_ERR(spin->obj); 30 goto err_hws; 31 } 32 33 i915_gem_object_set_cache_coherency(spin->hws, I915_CACHE_LLC); 34 vaddr = i915_gem_object_pin_map(spin->hws, I915_MAP_WB); 35 if (IS_ERR(vaddr)) { 36 err = PTR_ERR(vaddr); 37 goto err_obj; 38 } 39 spin->seqno = memset(vaddr, 0xff, PAGE_SIZE); 40 41 mode = i915_coherent_map_type(gt->i915); 42 vaddr = i915_gem_object_pin_map(spin->obj, mode); 43 if (IS_ERR(vaddr)) { 44 err = PTR_ERR(vaddr); 45 goto err_unpin_hws; 46 } 47 spin->batch = vaddr; 48 49 return 0; 50 51 err_unpin_hws: 52 i915_gem_object_unpin_map(spin->hws); 53 err_obj: 54 i915_gem_object_put(spin->obj); 55 err_hws: 56 i915_gem_object_put(spin->hws); 57 err: 58 return err; 59 } 60 61 static unsigned int seqno_offset(u64 fence) 62 { 63 return offset_in_page(sizeof(u32) * fence); 64 } 65 66 static u64 hws_address(const struct i915_vma *hws, 67 const struct i915_request *rq) 68 { 69 return hws->node.start + seqno_offset(rq->fence.context); 70 } 71 72 static int move_to_active(struct i915_vma *vma, 73 struct i915_request *rq, 74 unsigned int flags) 75 { 76 int err; 77 78 i915_vma_lock(vma); 79 err = i915_request_await_object(rq, vma->obj, 80 flags & EXEC_OBJECT_WRITE); 81 if (err == 0) 82 err = i915_vma_move_to_active(vma, rq, flags); 83 i915_vma_unlock(vma); 84 85 return err; 86 } 87 88 struct i915_request * 89 igt_spinner_create_request(struct igt_spinner *spin, 90 struct intel_context *ce, 91 u32 arbitration_command) 92 { 93 struct intel_engine_cs *engine = ce->engine; 94 struct i915_request *rq = NULL; 95 struct i915_vma *hws, *vma; 96 unsigned int flags; 97 u32 *batch; 98 int err; 99 100 GEM_BUG_ON(spin->gt != ce->vm->gt); 101 102 if (!intel_engine_can_store_dword(ce->engine)) 103 return ERR_PTR(-ENODEV); 104 105 vma = i915_vma_instance(spin->obj, ce->vm, NULL); 106 if (IS_ERR(vma)) 107 return ERR_CAST(vma); 108 109 hws = i915_vma_instance(spin->hws, ce->vm, NULL); 110 if (IS_ERR(hws)) 111 return ERR_CAST(hws); 112 113 err = i915_vma_pin(vma, 0, 0, PIN_USER); 114 if (err) 115 return ERR_PTR(err); 116 117 err = i915_vma_pin(hws, 0, 0, PIN_USER); 118 if (err) 119 goto unpin_vma; 120 121 rq = intel_context_create_request(ce); 122 if (IS_ERR(rq)) { 123 err = PTR_ERR(rq); 124 goto unpin_hws; 125 } 126 127 err = move_to_active(vma, rq, 0); 128 if (err) 129 goto cancel_rq; 130 131 err = move_to_active(hws, rq, 0); 132 if (err) 133 goto cancel_rq; 134 135 batch = spin->batch; 136 137 if (INTEL_GEN(rq->i915) >= 8) { 138 *batch++ = MI_STORE_DWORD_IMM_GEN4; 139 *batch++ = lower_32_bits(hws_address(hws, rq)); 140 *batch++ = upper_32_bits(hws_address(hws, rq)); 141 } else if (INTEL_GEN(rq->i915) >= 6) { 142 *batch++ = MI_STORE_DWORD_IMM_GEN4; 143 *batch++ = 0; 144 *batch++ = hws_address(hws, rq); 145 } else if (INTEL_GEN(rq->i915) >= 4) { 146 *batch++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT; 147 *batch++ = 0; 148 *batch++ = hws_address(hws, rq); 149 } else { 150 *batch++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL; 151 *batch++ = hws_address(hws, rq); 152 } 153 *batch++ = rq->fence.seqno; 154 155 *batch++ = arbitration_command; 156 157 if (INTEL_GEN(rq->i915) >= 8) 158 *batch++ = MI_BATCH_BUFFER_START | BIT(8) | 1; 159 else if (IS_HASWELL(rq->i915)) 160 *batch++ = MI_BATCH_BUFFER_START | MI_BATCH_PPGTT_HSW; 161 else if (INTEL_GEN(rq->i915) >= 6) 162 *batch++ = MI_BATCH_BUFFER_START; 163 else 164 *batch++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT; 165 *batch++ = lower_32_bits(vma->node.start); 166 *batch++ = upper_32_bits(vma->node.start); 167 168 *batch++ = MI_BATCH_BUFFER_END; /* not reached */ 169 170 intel_gt_chipset_flush(engine->gt); 171 172 if (engine->emit_init_breadcrumb && 173 i915_request_timeline(rq)->has_initial_breadcrumb) { 174 err = engine->emit_init_breadcrumb(rq); 175 if (err) 176 goto cancel_rq; 177 } 178 179 flags = 0; 180 if (INTEL_GEN(rq->i915) <= 5) 181 flags |= I915_DISPATCH_SECURE; 182 err = engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, flags); 183 184 cancel_rq: 185 if (err) { 186 i915_request_skip(rq, err); 187 i915_request_add(rq); 188 } 189 unpin_hws: 190 i915_vma_unpin(hws); 191 unpin_vma: 192 i915_vma_unpin(vma); 193 return err ? ERR_PTR(err) : rq; 194 } 195 196 static u32 197 hws_seqno(const struct igt_spinner *spin, const struct i915_request *rq) 198 { 199 u32 *seqno = spin->seqno + seqno_offset(rq->fence.context); 200 201 return READ_ONCE(*seqno); 202 } 203 204 void igt_spinner_end(struct igt_spinner *spin) 205 { 206 *spin->batch = MI_BATCH_BUFFER_END; 207 intel_gt_chipset_flush(spin->gt); 208 } 209 210 void igt_spinner_fini(struct igt_spinner *spin) 211 { 212 igt_spinner_end(spin); 213 214 i915_gem_object_unpin_map(spin->obj); 215 i915_gem_object_put(spin->obj); 216 217 i915_gem_object_unpin_map(spin->hws); 218 i915_gem_object_put(spin->hws); 219 } 220 221 bool igt_wait_for_spinner(struct igt_spinner *spin, struct i915_request *rq) 222 { 223 return !(wait_for_us(i915_seqno_passed(hws_seqno(spin, rq), 224 rq->fence.seqno), 225 10) && 226 wait_for(i915_seqno_passed(hws_seqno(spin, rq), 227 rq->fence.seqno), 228 1000)); 229 } 230