Greg Kroah-Hartman
5d392794b2
Link: https://lore.kernel.org/r/20251127144032.705323598@linuxfoundation.org Tested-by: Pavel Machek (CIP) <pavel@denx.de> Link: https://lore.kernel.org/r/20251127150346.125775439@linuxfoundation.org Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Linux Kernel Functional Testing <lkft@linaro.org> Tested-by: Dileep Malepu <dileep.debian@gmail.com> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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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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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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struct cma {
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unsigned long base_pfn;
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unsigned long count;
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unsigned long *bitmap;
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unsigned int order_per_bit; /* Order of pages represented by one bit */
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spinlock_t lock;
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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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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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/* the number of CMA page released */
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atomic64_t nr_pages_released;
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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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bool reserve_pages_on_error;
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};
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extern struct cma cma_areas[MAX_CMA_AREAS];
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extern unsigned cma_area_count;
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static inline unsigned long cma_bitmap_maxno(struct cma *cma)
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{
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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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void cma_sysfs_account_release_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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static inline void cma_sysfs_account_release_pages(struct cma *cma,
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unsigned long nr_pages) {};
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#endif
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#endif
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