1 /*
2 * SPDX-License-Identifier: MIT
3 *
4 * Copyright © 2018 Intel Corporation
5 */
6
7 #include "igt_gem_utils.h"
8
9 #include "gem/i915_gem_context.h"
10 #include "gem/i915_gem_internal.h"
11 #include "gem/i915_gem_pm.h"
12 #include "gt/intel_context.h"
13 #include "gt/intel_gpu_commands.h"
14 #include "gt/intel_gt.h"
15 #include "i915_vma.h"
16 #include "i915_drv.h"
17
18 #include "i915_request.h"
19
20 struct i915_request *
igt_request_alloc(struct i915_gem_context * ctx,struct intel_engine_cs * engine)21 igt_request_alloc(struct i915_gem_context *ctx, struct intel_engine_cs *engine)
22 {
23 struct intel_context *ce;
24 struct i915_request *rq;
25
26 /*
27 * Pinning the contexts may generate requests in order to acquire
28 * GGTT space, so do this first before we reserve a seqno for
29 * ourselves.
30 */
31 ce = i915_gem_context_get_engine(ctx, engine->legacy_idx);
32 if (IS_ERR(ce))
33 return ERR_CAST(ce);
34
35 rq = intel_context_create_request(ce);
36 intel_context_put(ce);
37
38 return rq;
39 }
40
41 struct i915_vma *
igt_emit_store_dw(struct i915_vma * vma,u64 offset,unsigned long count,u32 val)42 igt_emit_store_dw(struct i915_vma *vma,
43 u64 offset,
44 unsigned long count,
45 u32 val)
46 {
47 struct drm_i915_gem_object *obj;
48 const int ver = GRAPHICS_VER(vma->vm->i915);
49 unsigned long n, size;
50 u32 *cmd;
51 int err;
52
53 size = (4 * count + 1) * sizeof(u32);
54 size = round_up(size, PAGE_SIZE);
55 obj = i915_gem_object_create_internal(vma->vm->i915, size);
56 if (IS_ERR(obj))
57 return ERR_CAST(obj);
58
59 cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WC);
60 if (IS_ERR(cmd)) {
61 err = PTR_ERR(cmd);
62 goto err;
63 }
64
65 GEM_BUG_ON(offset + (count - 1) * PAGE_SIZE > vma->node.size);
66 offset += vma->node.start;
67
68 for (n = 0; n < count; n++) {
69 if (ver >= 8) {
70 *cmd++ = MI_STORE_DWORD_IMM_GEN4;
71 *cmd++ = lower_32_bits(offset);
72 *cmd++ = upper_32_bits(offset);
73 *cmd++ = val;
74 } else if (ver >= 4) {
75 *cmd++ = MI_STORE_DWORD_IMM_GEN4 |
76 (ver < 6 ? MI_USE_GGTT : 0);
77 *cmd++ = 0;
78 *cmd++ = offset;
79 *cmd++ = val;
80 } else {
81 *cmd++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL;
82 *cmd++ = offset;
83 *cmd++ = val;
84 }
85 offset += PAGE_SIZE;
86 }
87 *cmd = MI_BATCH_BUFFER_END;
88
89 i915_gem_object_flush_map(obj);
90 i915_gem_object_unpin_map(obj);
91
92 intel_gt_chipset_flush(vma->vm->gt);
93
94 vma = i915_vma_instance(obj, vma->vm, NULL);
95 if (IS_ERR(vma)) {
96 err = PTR_ERR(vma);
97 goto err;
98 }
99
100 err = i915_vma_pin(vma, 0, 0, PIN_USER);
101 if (err)
102 goto err;
103
104 return vma;
105
106 err:
107 i915_gem_object_put(obj);
108 return ERR_PTR(err);
109 }
110
igt_gpu_fill_dw(struct intel_context * ce,struct i915_vma * vma,u64 offset,unsigned long count,u32 val)111 int igt_gpu_fill_dw(struct intel_context *ce,
112 struct i915_vma *vma, u64 offset,
113 unsigned long count, u32 val)
114 {
115 struct i915_request *rq;
116 struct i915_vma *batch;
117 unsigned int flags;
118 int err;
119
120 GEM_BUG_ON(!intel_engine_can_store_dword(ce->engine));
121 GEM_BUG_ON(!i915_vma_is_pinned(vma));
122
123 batch = igt_emit_store_dw(vma, offset, count, val);
124 if (IS_ERR(batch))
125 return PTR_ERR(batch);
126
127 rq = intel_context_create_request(ce);
128 if (IS_ERR(rq)) {
129 err = PTR_ERR(rq);
130 goto err_batch;
131 }
132
133 i915_vma_lock(batch);
134 err = i915_request_await_object(rq, batch->obj, false);
135 if (err == 0)
136 err = i915_vma_move_to_active(batch, rq, 0);
137 i915_vma_unlock(batch);
138 if (err)
139 goto skip_request;
140
141 i915_vma_lock(vma);
142 err = i915_request_await_object(rq, vma->obj, true);
143 if (err == 0)
144 err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
145 i915_vma_unlock(vma);
146 if (err)
147 goto skip_request;
148
149 flags = 0;
150 if (GRAPHICS_VER(ce->vm->i915) <= 5)
151 flags |= I915_DISPATCH_SECURE;
152
153 err = rq->engine->emit_bb_start(rq,
154 batch->node.start, batch->node.size,
155 flags);
156
157 skip_request:
158 if (err)
159 i915_request_set_error_once(rq, err);
160 i915_request_add(rq);
161 err_batch:
162 i915_vma_unpin_and_release(&batch, 0);
163 return err;
164 }
165