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2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a 
 kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
....@@ -22,14 +22,12 @@
2222  * Authors: Christian König
2323  */
2424 
25
-#include <drm/drmP.h>
2625 #include "amdgpu.h"
2726 
28
-struct amdgpu_gtt_mgr {
29
-	struct drm_mm mm;
30
-	spinlock_t lock;
31
-	atomic64_t available;
32
-};
27
+static inline struct amdgpu_gtt_mgr *to_gtt_mgr(struct ttm_resource_manager *man)
28
+{
29
+	return container_of(man, struct amdgpu_gtt_mgr, manager);
30
+}
3331 
3432 struct amdgpu_gtt_node {
3533 	struct drm_mm_node node;
....@@ -37,50 +35,120 @@
3735 };
3836 
3937 /**
38
+ * DOC: mem_info_gtt_total
39
+ *
40
+ * The amdgpu driver provides a sysfs API for reporting current total size of
41
+ * the GTT.
42
+ * The file mem_info_gtt_total is used for this, and returns the total size of
43
+ * the GTT block, in bytes
44
+ */
45
+static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev,
46
+		struct device_attribute *attr, char *buf)
47
+{
48
+	struct drm_device *ddev = dev_get_drvdata(dev);
49
+	struct amdgpu_device *adev = drm_to_adev(ddev);
50
+	struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
51
+
52
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
53
+			man->size * PAGE_SIZE);
54
+}
55
+
56
+/**
57
+ * DOC: mem_info_gtt_used
58
+ *
59
+ * The amdgpu driver provides a sysfs API for reporting current total amount of
60
+ * used GTT.
61
+ * The file mem_info_gtt_used is used for this, and returns the current used
62
+ * size of the GTT block, in bytes
63
+ */
64
+static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev,
65
+		struct device_attribute *attr, char *buf)
66
+{
67
+	struct drm_device *ddev = dev_get_drvdata(dev);
68
+	struct amdgpu_device *adev = drm_to_adev(ddev);
69
+	struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
70
+
71
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
72
+			amdgpu_gtt_mgr_usage(man));
73
+}
74
+
75
+static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
76
+	           amdgpu_mem_info_gtt_total_show, NULL);
77
+static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO,
78
+	           amdgpu_mem_info_gtt_used_show, NULL);
79
+
80
+static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func;
81
+/**
4082  * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
4183  *
42
- * @man: TTM memory type manager
43
- * @p_size: maximum size of GTT
84
+ * @adev: amdgpu_device pointer
85
+ * @gtt_size: maximum size of GTT
4486  *
4587  * Allocate and initialize the GTT manager.
4688  */
47
-static int amdgpu_gtt_mgr_init(struct ttm_mem_type_manager *man,
48
-			       unsigned long p_size)
89
+int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size)
4990 {
50
-	struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
51
-	struct amdgpu_gtt_mgr *mgr;
91
+	struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
92
+	struct ttm_resource_manager *man = &mgr->manager;
5293 	uint64_t start, size;
94
+	int ret;
5395 
54
-	mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
55
-	if (!mgr)
56
-		return -ENOMEM;
96
+	man->use_tt = true;
97
+	man->func = &amdgpu_gtt_mgr_func;
98
+
99
+	ttm_resource_manager_init(man, gtt_size >> PAGE_SHIFT);
57100 
58101 	start = AMDGPU_GTT_MAX_TRANSFER_SIZE * AMDGPU_GTT_NUM_TRANSFER_WINDOWS;
59102 	size = (adev->gmc.gart_size >> PAGE_SHIFT) - start;
60103 	drm_mm_init(&mgr->mm, start, size);
61104 	spin_lock_init(&mgr->lock);
62
-	atomic64_set(&mgr->available, p_size);
63
-	man->priv = mgr;
105
+	atomic64_set(&mgr->available, gtt_size >> PAGE_SHIFT);
106
+
107
+	ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_total);
108
+	if (ret) {
109
+		DRM_ERROR("Failed to create device file mem_info_gtt_total\n");
110
+		return ret;
111
+	}
112
+	ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_used);
113
+	if (ret) {
114
+		DRM_ERROR("Failed to create device file mem_info_gtt_used\n");
115
+		return ret;
116
+	}
117
+
118
+	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, &mgr->manager);
119
+	ttm_resource_manager_set_used(man, true);
64120 	return 0;
65121 }
66122 
67123 /**
68124  * amdgpu_gtt_mgr_fini - free and destroy GTT manager
69125  *
70
- * @man: TTM memory type manager
126
+ * @adev: amdgpu_device pointer
71127  *
72128  * Destroy and free the GTT manager, returns -EBUSY if ranges are still
73129  * allocated inside it.
74130  */
75
-static int amdgpu_gtt_mgr_fini(struct ttm_mem_type_manager *man)
131
+void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev)
76132 {
77
-	struct amdgpu_gtt_mgr *mgr = man->priv;
133
+	struct amdgpu_gtt_mgr *mgr = &adev->mman.gtt_mgr;
134
+	struct ttm_resource_manager *man = &mgr->manager;
135
+	int ret;
136
+
137
+	ttm_resource_manager_set_used(man, false);
138
+
139
+	ret = ttm_resource_manager_force_list_clean(&adev->mman.bdev, man);
140
+	if (ret)
141
+		return;
142
+
78143 	spin_lock(&mgr->lock);
79144 	drm_mm_takedown(&mgr->mm);
80145 	spin_unlock(&mgr->lock);
81
-	kfree(mgr);
82
-	man->priv = NULL;
83
-	return 0;
146
+
147
+	device_remove_file(adev->dev, &dev_attr_mem_info_gtt_total);
148
+	device_remove_file(adev->dev, &dev_attr_mem_info_gtt_used);
149
+
150
+	ttm_resource_manager_cleanup(man);
151
+	ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_TT, NULL);
84152 }
85153 
86154 /**
....@@ -90,62 +158,9 @@
90158  *
91159  * Check if a mem object has already address space allocated.
92160  */
93
-bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_mem_reg *mem)
161
+bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *mem)
94162 {
95
-	struct amdgpu_gtt_node *node = mem->mm_node;
96
-
97
-	return (node->node.start != AMDGPU_BO_INVALID_OFFSET);
98
-}
99
-
100
-/**
101
- * amdgpu_gtt_mgr_alloc - allocate new ranges
102
- *
103
- * @man: TTM memory type manager
104
- * @tbo: TTM BO we need this range for
105
- * @place: placement flags and restrictions
106
- * @mem: the resulting mem object
107
- *
108
- * Allocate the address space for a node.
109
- */
110
-static int amdgpu_gtt_mgr_alloc(struct ttm_mem_type_manager *man,
111
-				struct ttm_buffer_object *tbo,
112
-				const struct ttm_place *place,
113
-				struct ttm_mem_reg *mem)
114
-{
115
-	struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
116
-	struct amdgpu_gtt_mgr *mgr = man->priv;
117
-	struct amdgpu_gtt_node *node = mem->mm_node;
118
-	enum drm_mm_insert_mode mode;
119
-	unsigned long fpfn, lpfn;
120
-	int r;
121
-
122
-	if (amdgpu_gtt_mgr_has_gart_addr(mem))
123
-		return 0;
124
-
125
-	if (place)
126
-		fpfn = place->fpfn;
127
-	else
128
-		fpfn = 0;
129
-
130
-	if (place && place->lpfn)
131
-		lpfn = place->lpfn;
132
-	else
133
-		lpfn = adev->gart.num_cpu_pages;
134
-
135
-	mode = DRM_MM_INSERT_BEST;
136
-	if (place && place->flags & TTM_PL_FLAG_TOPDOWN)
137
-		mode = DRM_MM_INSERT_HIGH;
138
-
139
-	spin_lock(&mgr->lock);
140
-	r = drm_mm_insert_node_in_range(&mgr->mm, &node->node, mem->num_pages,
141
-					mem->page_alignment, 0, fpfn, lpfn,
142
-					mode);
143
-	spin_unlock(&mgr->lock);
144
-
145
-	if (!r)
146
-		mem->start = node->node.start;
147
-
148
-	return r;
163
+	return mem->mm_node != NULL;
149164 }
150165 
151166 /**
....@@ -158,12 +173,12 @@
158173  *
159174  * Dummy, allocate the node but no space for it yet.
160175  */
161
-static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager *man,
176
+static int amdgpu_gtt_mgr_new(struct ttm_resource_manager *man,
162177 			      struct ttm_buffer_object *tbo,
163178 			      const struct ttm_place *place,
164
-			      struct ttm_mem_reg *mem)
179
+			      struct ttm_resource *mem)
165180 {
166
-	struct amdgpu_gtt_mgr *mgr = man->priv;
181
+	struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
167182 	struct amdgpu_gtt_node *node;
168183 	int r;
169184 
....@@ -171,10 +186,16 @@
171186 	if ((&tbo->mem == mem || tbo->mem.mem_type != TTM_PL_TT) &&
172187 	    atomic64_read(&mgr->available) < mem->num_pages) {
173188 		spin_unlock(&mgr->lock);
174
-		return 0;
189
+		return -ENOSPC;
175190 	}
176191 	atomic64_sub(mem->num_pages, &mgr->available);
177192 	spin_unlock(&mgr->lock);
193
+
194
+	if (!place->lpfn) {
195
+		mem->mm_node = NULL;
196
+		mem->start = AMDGPU_BO_INVALID_OFFSET;
197
+		return 0;
198
+	}
178199 
179200 	node = kzalloc(sizeof(*node), GFP_KERNEL);
180201 	if (!node) {
....@@ -182,24 +203,25 @@
182203 		goto err_out;
183204 	}
184205 
185
-	node->node.start = AMDGPU_BO_INVALID_OFFSET;
186
-	node->node.size = mem->num_pages;
187206 	node->tbo = tbo;
188
-	mem->mm_node = node;
189207 
190
-	if (place->fpfn || place->lpfn || place->flags & TTM_PL_FLAG_TOPDOWN) {
191
-		r = amdgpu_gtt_mgr_alloc(man, tbo, place, mem);
192
-		if (unlikely(r)) {
193
-			kfree(node);
194
-			mem->mm_node = NULL;
195
-			r = 0;
196
-			goto err_out;
197
-		}
198
-	} else {
199
-		mem->start = node->node.start;
200
-	}
208
+	spin_lock(&mgr->lock);
209
+	r = drm_mm_insert_node_in_range(&mgr->mm, &node->node, mem->num_pages,
210
+					mem->page_alignment, 0, place->fpfn,
211
+					place->lpfn, DRM_MM_INSERT_BEST);
212
+	spin_unlock(&mgr->lock);
213
+
214
+	if (unlikely(r))
215
+		goto err_free;
216
+
217
+	mem->mm_node = node;
218
+	mem->start = node->node.start;
201219 
202220 	return 0;
221
+
222
+err_free:
223
+	kfree(node);
224
+
203225 err_out:
204226 	atomic64_add(mem->num_pages, &mgr->available);
205227 
....@@ -210,29 +232,24 @@
210232  * amdgpu_gtt_mgr_del - free ranges
211233  *
212234  * @man: TTM memory type manager
213
- * @tbo: TTM BO we need this range for
214
- * @place: placement flags and restrictions
215235  * @mem: TTM memory object
216236  *
217237  * Free the allocated GTT again.
218238  */
219
-static void amdgpu_gtt_mgr_del(struct ttm_mem_type_manager *man,
220
-			       struct ttm_mem_reg *mem)
239
+static void amdgpu_gtt_mgr_del(struct ttm_resource_manager *man,
240
+			       struct ttm_resource *mem)
221241 {
222
-	struct amdgpu_gtt_mgr *mgr = man->priv;
242
+	struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
223243 	struct amdgpu_gtt_node *node = mem->mm_node;
224244 
225
-	if (!node)
226
-		return;
227
-
228
-	spin_lock(&mgr->lock);
229
-	if (node->node.start != AMDGPU_BO_INVALID_OFFSET)
245
+	if (node) {
246
+		spin_lock(&mgr->lock);
230247 		drm_mm_remove_node(&node->node);
231
-	spin_unlock(&mgr->lock);
232
-	atomic64_add(mem->num_pages, &mgr->available);
248
+		spin_unlock(&mgr->lock);
249
+		kfree(node);
250
+	}
233251 
234
-	kfree(node);
235
-	mem->mm_node = NULL;
252
+	atomic64_add(mem->num_pages, &mgr->available);
236253 }
237254 
238255 /**
....@@ -242,17 +259,17 @@
242259  *
243260  * Return how many bytes are used in the GTT domain
244261  */
245
-uint64_t amdgpu_gtt_mgr_usage(struct ttm_mem_type_manager *man)
262
+uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man)
246263 {
247
-	struct amdgpu_gtt_mgr *mgr = man->priv;
264
+	struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
248265 	s64 result = man->size - atomic64_read(&mgr->available);
249266 
250267 	return (result > 0 ? result : 0) * PAGE_SIZE;
251268 }
252269 
253
-int amdgpu_gtt_mgr_recover(struct ttm_mem_type_manager *man)
270
+int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man)
254271 {
255
-	struct amdgpu_gtt_mgr *mgr = man->priv;
272
+	struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
256273 	struct amdgpu_gtt_node *node;
257274 	struct drm_mm_node *mm_node;
258275 	int r = 0;
....@@ -277,10 +294,10 @@
277294  *
278295  * Dump the table content using printk.
279296  */
280
-static void amdgpu_gtt_mgr_debug(struct ttm_mem_type_manager *man,
297
+static void amdgpu_gtt_mgr_debug(struct ttm_resource_manager *man,
281298 				 struct drm_printer *printer)
282299 {
283
-	struct amdgpu_gtt_mgr *mgr = man->priv;
300
+	struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
284301 
285302 	spin_lock(&mgr->lock);
286303 	drm_mm_print(&mgr->mm, printer);
....@@ -291,10 +308,8 @@
291308 		   amdgpu_gtt_mgr_usage(man) >> 20);
292309 }
293310 
294
-const struct ttm_mem_type_manager_func amdgpu_gtt_mgr_func = {
295
-	.init = amdgpu_gtt_mgr_init,
296
-	.takedown = amdgpu_gtt_mgr_fini,
297
-	.get_node = amdgpu_gtt_mgr_new,
298
-	.put_node = amdgpu_gtt_mgr_del,
311
+static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func = {
312
+	.alloc = amdgpu_gtt_mgr_new,
313
+	.free = amdgpu_gtt_mgr_del,
299314 	.debug = amdgpu_gtt_mgr_debug
300315 };