add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/mm/cma.h
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@@ -2,6 +2,15 @@
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 #ifndef __MM_CMA_H__
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 #define __MM_CMA_H__
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+#include <linux/debugfs.h>
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+#include <linux/kobject.h>
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+#include <linux/android_vendor.h>
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+
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+struct cma_kobject {
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+	struct kobject kobj;
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+	struct cma *cma;
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+};
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+
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 struct cma {
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 	unsigned long   base_pfn;
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 	unsigned long   count;
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@@ -11,9 +20,18 @@
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 #ifdef CONFIG_CMA_DEBUGFS
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 	struct hlist_head mem_head;
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 	spinlock_t mem_head_lock;
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+	struct debugfs_u32_array dfs_bitmap;
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 #endif
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-	const char *name;
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-	bool inactive;
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+	char name[CMA_MAX_NAME];
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+#ifdef CONFIG_CMA_SYSFS
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+	/* the number of CMA page successful allocations */
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+	atomic64_t nr_pages_succeeded;
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+	/* the number of CMA page allocation failures */
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+	atomic64_t nr_pages_failed;
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+	/* kobject requires dynamic object */
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+	struct cma_kobject *cma_kobj;
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+#endif
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+	ANDROID_OEM_DATA_ARRAY(1, 4);
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 };
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 extern struct cma cma_areas[MAX_CMA_AREAS];
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@@ -24,4 +42,13 @@
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 	return cma->count >> cma->order_per_bit;
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 }
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+#ifdef CONFIG_CMA_SYSFS
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+void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages);
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+void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages);
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+#else
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+static inline void cma_sysfs_account_success_pages(struct cma *cma,
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+						   unsigned long nr_pages) {};
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+static inline void cma_sysfs_account_fail_pages(struct cma *cma,
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+						unsigned long nr_pages) {};
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+#endif
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 #endif