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2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/gpu/arm/bifrost/mali_kbase_fence.h
....@@ -1,7 +1,7 @@
11 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
22 /*
33  *
4
- * (C) COPYRIGHT 2010-2018, 2020-2021 ARM Limited. All rights reserved.
4
+ * (C) COPYRIGHT 2010-2023 ARM Limited. All rights reserved.
55  *
66  * This program is free software and is provided to you under the terms of the
77  * GNU General Public License version 2 as published by the Free Software
....@@ -23,16 +23,55 @@
2323 #define _KBASE_FENCE_H_
2424 
2525 /*
26
- * mali_kbase_fence.[hc] has common fence code used by both
27
- * - CONFIG_MALI_BIFROST_DMA_FENCE - implicit DMA fences
28
- * - CONFIG_SYNC_FILE      - explicit fences beginning with 4.9 kernel
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+ * mali_kbase_fence.[hc] has fence code used only by
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+ * - CONFIG_SYNC_FILE      - explicit fences
2928  */
3029 
31
-#if defined(CONFIG_MALI_BIFROST_DMA_FENCE) || defined(CONFIG_SYNC_FILE)
30
+#if IS_ENABLED(CONFIG_SYNC_FILE)
3231 
3332 #include <linux/list.h>
3433 #include "mali_kbase_fence_defs.h"
3534 #include "mali_kbase.h"
35
+#include "mali_kbase_refcount_defs.h"
36
+
37
+#if MALI_USE_CSF
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+/* Maximum number of characters in DMA fence timeline name. */
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+#define MAX_TIMELINE_NAME (32)
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+
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+/**
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+ * struct kbase_kcpu_dma_fence_meta - Metadata structure for dma fence objects containing
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+ *                                    information about KCPU queue. One instance per KCPU
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+ *                                    queue.
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+ *
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+ * @refcount:       Atomic value to keep track of number of references to an instance.
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+ *                  An instance can outlive the KCPU queue itself.
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+ * @kbdev:          Pointer to Kbase device.
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+ * @kctx_id:        Kbase context ID.
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+ * @timeline_name:  String of timeline name for associated fence object.
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+ */
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+struct kbase_kcpu_dma_fence_meta {
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+	kbase_refcount_t refcount;
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+	struct kbase_device *kbdev;
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+	int kctx_id;
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+	char timeline_name[MAX_TIMELINE_NAME];
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+};
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+
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+/**
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+ * struct kbase_kcpu_dma_fence - Structure which extends a dma fence object to include a
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+ *                               reference to metadata containing more informaiton about it.
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+ *
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+ * @base:      Fence object itself.
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+ * @metadata:  Pointer to metadata structure.
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+ */
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+struct kbase_kcpu_dma_fence {
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+#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
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+	struct fence base;
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+#else
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+	struct dma_fence base;
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+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) */
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+	struct kbase_kcpu_dma_fence_meta *metadata;
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+};
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+#endif
3675 
3776 #if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
3877 extern const struct fence_ops kbase_fence_ops;
....@@ -41,29 +80,10 @@
4180 #endif
4281 
4382 /**
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-* struct kbase_fence_cb - Mali dma-fence callback data struct
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-* @fence_cb: Callback function
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-* @katom:    Pointer to katom that is waiting on this callback
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-* @fence:    Pointer to the fence object on which this callback is waiting
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-* @node:     List head for linking this callback to the katom
49
-*/
50
-struct kbase_fence_cb {
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-#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
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-	struct fence_cb fence_cb;
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-	struct fence *fence;
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-#else
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-	struct dma_fence_cb fence_cb;
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-	struct dma_fence *fence;
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-#endif
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-	struct kbase_jd_atom *katom;
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-	struct list_head node;
60
-};
61
-
62
-/**
6383  * kbase_fence_out_new() - Creates a new output fence and puts it on the atom
6484  * @katom: Atom to create an output fence for
6585  *
66
- * return: A new fence object on success, NULL on failure.
86
+ * Return: A new fence object on success, NULL on failure.
6787  */
6888 #if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
6989 struct fence *kbase_fence_out_new(struct kbase_jd_atom *katom);
....@@ -71,7 +91,7 @@
7191 struct dma_fence *kbase_fence_out_new(struct kbase_jd_atom *katom);
7292 #endif
7393 
74
-#if defined(CONFIG_SYNC_FILE)
94
+#if IS_ENABLED(CONFIG_SYNC_FILE)
7595 /**
7696  * kbase_fence_fence_in_set() - Assign input fence to atom
7797  * @katom: Atom to assign input fence to
....@@ -102,9 +122,9 @@
102122 	}
103123 }
104124 
105
-#if defined(CONFIG_SYNC_FILE)
125
+#if IS_ENABLED(CONFIG_SYNC_FILE)
106126 /**
107
- * kbase_fence_out_remove() - Removes the input fence from atom
127
+ * kbase_fence_in_remove() - Removes the input fence from atom
108128  * @katom: Atom to remove input fence for
109129  *
110130  * This will also release the reference to this fence which the atom keeps
....@@ -153,101 +173,7 @@
153173 	return dma_fence_signal(katom->dma_fence.fence);
154174 }
155175 
156
-/**
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- * kbase_fence_add_callback() - Add callback on @fence to block @katom
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- * @katom: Pointer to katom that will be blocked by @fence
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- * @fence: Pointer to fence on which to set up the callback
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- * @callback: Pointer to function to be called when fence is signaled
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- *
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- * Caller needs to hold a reference to @fence when calling this function, and
163
- * the caller is responsible for releasing that reference.  An additional
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- * reference to @fence will be taken when the callback was successfully set up
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- * and @fence needs to be kept valid until the callback has been called and
166
- * cleanup have been done.
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- *
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- * Return: 0 on success: fence was either already signaled, or callback was
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- * set up. Negative error code is returned on error.
170
- */
171
-#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
172
-int kbase_fence_add_callback(struct kbase_jd_atom *katom,
173
-			     struct fence *fence,
174
-			     fence_func_t callback);
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-#else
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-int kbase_fence_add_callback(struct kbase_jd_atom *katom,
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-			     struct dma_fence *fence,
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-			     dma_fence_func_t callback);
179
-#endif
180
-
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-/**
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- * kbase_fence_dep_count_set() - Set dep_count value on atom to specified value
183
- * @katom: Atom to set dep_count for
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- * @val: value to set dep_count to
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- *
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- * The dep_count is available to the users of this module so that they can
187
- * synchronize completion of the wait with cancellation and adding of more
188
- * callbacks. For instance, a user could do the following:
189
- *
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- * dep_count set to 1
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- * callback #1 added, dep_count is increased to 2
192
- *                             callback #1 happens, dep_count decremented to 1
193
- *                             since dep_count > 0, no completion is done
194
- * callback #2 is added, dep_count is increased to 2
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- * dep_count decremented to 1
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- *                             callback #2 happens, dep_count decremented to 0
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- *                             since dep_count now is zero, completion executes
198
- *
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- * The dep_count can also be used to make sure that the completion only
200
- * executes once. This is typically done by setting dep_count to -1 for the
201
- * thread that takes on this responsibility.
202
- */
203
-static inline void
204
-kbase_fence_dep_count_set(struct kbase_jd_atom *katom, int val)
205
-{
206
-	atomic_set(&katom->dma_fence.dep_count, val);
207
-}
208
-
209
-/**
210
- * kbase_fence_dep_count_dec_and_test() - Decrements dep_count
211
- * @katom: Atom to decrement dep_count for
212
- *
213
- * See @kbase_fence_dep_count_set for general description about dep_count
214
- *
215
- * Return: true if value was decremented to zero, otherwise false
216
- */
217
-static inline bool
218
-kbase_fence_dep_count_dec_and_test(struct kbase_jd_atom *katom)
219
-{
220
-	return atomic_dec_and_test(&katom->dma_fence.dep_count);
221
-}
222
-
223
-/**
224
- * kbase_fence_dep_count_read() - Returns the current dep_count value
225
- * @katom: Pointer to katom
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- *
227
- * See @kbase_fence_dep_count_set for general description about dep_count
228
- *
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- * Return: The current dep_count value
230
- */
231
-static inline int kbase_fence_dep_count_read(struct kbase_jd_atom *katom)
232
-{
233
-	return atomic_read(&katom->dma_fence.dep_count);
234
-}
235
-
236
-/**
237
- * kbase_fence_free_callbacks() - Free dma-fence callbacks on a katom
238
- * @katom: Pointer to katom
239
- *
240
- * This function will free all fence callbacks on the katom's list of
241
- * callbacks. Callbacks that have not yet been called, because their fence
242
- * hasn't yet signaled, will first be removed from the fence.
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- *
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- * Locking: katom->dma_fence.callbacks list assumes jctx.lock is held.
245
- *
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- * Return: true if dep_count reached 0, otherwise false.
247
- */
248
-bool kbase_fence_free_callbacks(struct kbase_jd_atom *katom);
249
-
250
-#if defined(CONFIG_SYNC_FILE)
176
+#if IS_ENABLED(CONFIG_SYNC_FILE)
251177 /**
252178  * kbase_fence_in_get() - Retrieve input fence for atom.
253179  * @katom: Atom to get input fence from
....@@ -272,12 +198,62 @@
272198 #endif /* !MALI_USE_CSF */
273199 
274200 /**
201
+ * kbase_fence_get() - Retrieve fence for a KCPUQ fence command.
202
+ * @fence_info: KCPUQ fence command
203
+ *
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+ * A ref will be taken for the fence, so use @kbase_fence_put() to release it
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+ *
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+ * Return: The fence, or NULL if there is no fence for KCPUQ fence command
207
+ */
208
+#define kbase_fence_get(fence_info) dma_fence_get((fence_info)->fence)
209
+
210
+#if MALI_USE_CSF
211
+#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
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+static inline struct kbase_kcpu_dma_fence *kbase_kcpu_dma_fence_get(struct fence *fence)
213
+#else
214
+static inline struct kbase_kcpu_dma_fence *kbase_kcpu_dma_fence_get(struct dma_fence *fence)
215
+#endif
216
+{
217
+	if (fence->ops == &kbase_fence_ops)
218
+		return (struct kbase_kcpu_dma_fence *)fence;
219
+
220
+	return NULL;
221
+}
222
+
223
+static inline void kbase_kcpu_dma_fence_meta_put(struct kbase_kcpu_dma_fence_meta *metadata)
224
+{
225
+	if (kbase_refcount_dec_and_test(&metadata->refcount)) {
226
+		atomic_dec(&metadata->kbdev->live_fence_metadata);
227
+		kfree(metadata);
228
+	}
229
+}
230
+
231
+#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
232
+static inline void kbase_kcpu_dma_fence_put(struct fence *fence)
233
+#else
234
+static inline void kbase_kcpu_dma_fence_put(struct dma_fence *fence)
235
+#endif
236
+{
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+	struct kbase_kcpu_dma_fence *kcpu_fence = kbase_kcpu_dma_fence_get(fence);
238
+
239
+	if (kcpu_fence)
240
+		kbase_kcpu_dma_fence_meta_put(kcpu_fence->metadata);
241
+}
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+#endif /* MALI_USE_CSF */
243
+
244
+/**
275245  * kbase_fence_put() - Releases a reference to a fence
276246  * @fence: Fence to release reference for.
277247  */
278
-#define kbase_fence_put(fence) dma_fence_put(fence)
248
+#if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
249
+static inline void kbase_fence_put(struct fence *fence)
250
+#else
251
+static inline void kbase_fence_put(struct dma_fence *fence)
252
+#endif
253
+{
254
+	dma_fence_put(fence);
255
+}
279256 
280
-
281
-#endif /* CONFIG_MALI_BIFROST_DMA_FENCE || defined(CONFIG_SYNC_FILE */
257
+#endif /* IS_ENABLED(CONFIG_SYNC_FILE) */
282258 
283259 #endif /* _KBASE_FENCE_H_ */