mirror of
https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10.git
synced 2026-09-09 00:07:04 +08:00
Jerry Snitselaar
4939761c93
JIRA: https://issues.redhat.com/browse/RHEL-213791 Upstream-Status: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git Conflicts: context diff in fdt_scan_reserved_mem_reg_nodes() commit 0fd17e5983337231dc655e9ca0095d2ca3f47405 Author: Oreoluwa Babatunde <oreoluwa.babatunde@oss.qualcomm.com> Date: Mon Jan 26 18:13:27 2026 +0100 of: reserved_mem: Allow reserved_mem framework detect "cma=" kernel param When initializing the default cma region, the "cma=" kernel parameter takes priority over a DT defined linux,cma-default region. Hence, give the reserved_mem framework the ability to detect this so that the DT defined cma region can skip initialization accordingly. Signed-off-by: Oreoluwa Babatunde <oreoluwa.babatunde@oss.qualcomm.com> Tested-by: Joy Zou <joy.zou@nxp.com> Acked-by: Rob Herring (Arm) <robh@kernel.org> Fixes: 8a6e02d0c00e ("of: reserved_mem: Restructure how the reserved memory regions are processed") Fixes: 2c223f7239f3 ("of: reserved_mem: Restructure call site for dma_contiguous_early_fixup()") Link: https://lore.kernel.org/r/20251210002027.1171519-1-oreoluwa.babatunde@oss.qualcomm.com [mszyprow: rebased onto v6.19-rc1, added fixes tags, added a stub for cma_skip_dt_default_reserved_mem() if no CONFIG_DMA_CMA is set] Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> (cherry picked from commit 0fd17e5983337231dc655e9ca0095d2ca3f47405) Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __CMA_H__
|
|
#define __CMA_H__
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/numa.h>
|
|
|
|
#ifdef CONFIG_CMA_AREAS
|
|
#define MAX_CMA_AREAS CONFIG_CMA_AREAS
|
|
#endif
|
|
|
|
#define CMA_MAX_NAME 64
|
|
|
|
/*
|
|
* the buddy -- especially pageblock merging and alloc_contig_range()
|
|
* -- can deal with only some pageblocks of a higher-order page being
|
|
* MIGRATE_CMA, we can use pageblock_nr_pages.
|
|
*/
|
|
#define CMA_MIN_ALIGNMENT_PAGES pageblock_nr_pages
|
|
#define CMA_MIN_ALIGNMENT_BYTES (PAGE_SIZE * CMA_MIN_ALIGNMENT_PAGES)
|
|
|
|
struct cma;
|
|
|
|
extern unsigned long totalcma_pages;
|
|
extern phys_addr_t cma_get_base(const struct cma *cma);
|
|
extern unsigned long cma_get_size(const struct cma *cma);
|
|
extern const char *cma_get_name(const struct cma *cma);
|
|
|
|
extern int __init cma_declare_contiguous_nid(phys_addr_t base,
|
|
phys_addr_t size, phys_addr_t limit,
|
|
phys_addr_t alignment, unsigned int order_per_bit,
|
|
bool fixed, const char *name, struct cma **res_cma,
|
|
int nid);
|
|
static inline int __init cma_declare_contiguous(phys_addr_t base,
|
|
phys_addr_t size, phys_addr_t limit,
|
|
phys_addr_t alignment, unsigned int order_per_bit,
|
|
bool fixed, const char *name, struct cma **res_cma)
|
|
{
|
|
return cma_declare_contiguous_nid(base, size, limit, alignment,
|
|
order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
|
|
}
|
|
extern int __init cma_declare_contiguous_multi(phys_addr_t size,
|
|
phys_addr_t align, unsigned int order_per_bit,
|
|
const char *name, struct cma **res_cma, int nid);
|
|
extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
|
|
unsigned int order_per_bit,
|
|
const char *name,
|
|
struct cma **res_cma);
|
|
extern struct page *cma_alloc(struct cma *cma, unsigned long count, unsigned int align,
|
|
bool no_warn);
|
|
extern bool cma_pages_valid(struct cma *cma, const struct page *pages, unsigned long count);
|
|
extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count);
|
|
|
|
extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
|
|
extern bool cma_intersects(struct cma *cma, unsigned long start, unsigned long end);
|
|
|
|
extern void cma_reserve_pages_on_error(struct cma *cma);
|
|
|
|
#ifdef CONFIG_DMA_CMA
|
|
extern bool cma_skip_dt_default_reserved_mem(void);
|
|
#else
|
|
static inline bool cma_skip_dt_default_reserved_mem(void)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_CMA
|
|
struct folio *cma_alloc_folio(struct cma *cma, int order, gfp_t gfp);
|
|
bool cma_free_folio(struct cma *cma, const struct folio *folio);
|
|
bool cma_validate_zones(struct cma *cma);
|
|
#else
|
|
static inline struct folio *cma_alloc_folio(struct cma *cma, int order, gfp_t gfp)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool cma_free_folio(struct cma *cma, const struct folio *folio)
|
|
{
|
|
return false;
|
|
}
|
|
static inline bool cma_validate_zones(struct cma *cma)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
#endif
|