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Commit 77dbb1d1 authored by Laura Abbott's avatar Laura Abbott Committed by Prakash Gupta
Browse files

cma: Store a name in the cma structure 



Frameworks that may want to enumerate CMA heaps (e.g. Ion) will find it
useful to have an explicit name attached to each region. Store the name
in each CMA structure.

Change-Id: Ia4d4fdc7b6044bffe3238e53e78e4e47206d7f91
Signed-off-by: default avatarLaura Abbott <labbott@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: f318dd083c8128c50e48ceb8c3e812e52800fc4f
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: default avatarPrakash Gupta <guptap@codeaurora.org>
parent 2f90dca7

arch/powerpc/kvm/book3s_hv_builtin.c

+2 −1
Original line number Diff line number Diff line
@@ -97,7 +97,8 @@ void __init kvm_cma_reserve(void) 
			 (unsigned long)selected_size / SZ_1M);

		align_size = HPT_ALIGN_PAGES << PAGE_SHIFT;

		cma_declare_contiguous(0, selected_size, 0, align_size,

			KVM_CMA_CHUNK_ORDER - PAGE_SHIFT, false, &kvm_cma);

			KVM_CMA_CHUNK_ORDER - PAGE_SHIFT, false, "kvm_cma",

			&kvm_cma);

	}

}

drivers/base/dma-contiguous.c

+3 −2
Original line number Diff line number Diff line
@@ -165,7 +165,8 @@ int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base, 
{

	int ret;



	ret = cma_declare_contiguous(base, size, limit, 0, 0, fixed, res_cma);

	ret = cma_declare_contiguous(base, size, limit, 0, 0, fixed,

					"reserved", res_cma);

	if (ret)

		return ret;
@@ -257,7 +258,7 @@ static int __init rmem_cma_setup(struct reserved_mem *rmem) 
		return -EINVAL;

	}



	err = cma_init_reserved_mem(rmem->base, rmem->size, 0, &cma);

	err = cma_init_reserved_mem(rmem->base, rmem->size, 0, rmem->name, &cma);

	if (err) {

		pr_err("Reserved memory: unable to setup CMA region\n");

		return err;

include/linux/cma.h

+3 −1
Original line number Diff line number Diff line
@@ -18,13 +18,15 @@ 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(phys_addr_t base,

			phys_addr_t size, phys_addr_t limit,

			phys_addr_t alignment, unsigned int order_per_bit,

			bool fixed, struct cma **res_cma);

			bool fixed, const char *name, struct cma **res_cma);

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, size_t count, unsigned int align);

extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);

mm/cma.c

+15 −2
Original line number Diff line number Diff line
@@ -54,6 +54,11 @@ unsigned long cma_get_size(const struct cma *cma) 
	return cma->count << PAGE_SHIFT;

}



const char *cma_get_name(const struct cma *cma)

{

	return cma->name ? cma->name : "(undefined)";

}



static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,

					     int align_order)

{
@@ -173,6 +178,7 @@ core_initcall(cma_init_reserved_areas); 
 */

int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,

				 unsigned int order_per_bit,

				 const char *name,

				 struct cma **res_cma)

{

	struct cma *cma;
@@ -203,6 +209,13 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, 
	 * subsystems (like slab allocator) are available.

	 */

	cma = &cma_areas[cma_area_count];

	if (name) {

		cma->name = name;

	} else {

		cma->name = kasprintf(GFP_KERNEL, "cma%d\n", cma_area_count);

		if (!cma->name)

			return -ENOMEM;

	}

	cma->base_pfn = PFN_DOWN(base);

	cma->count = size >> PAGE_SHIFT;

	cma->order_per_bit = order_per_bit;
@@ -234,7 +247,7 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, 
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, struct cma **res_cma)

			bool fixed, const char *name, struct cma **res_cma)

{

	phys_addr_t memblock_end = memblock_end_of_DRAM();

	phys_addr_t highmem_start;
@@ -345,7 +358,7 @@ int __init cma_declare_contiguous(phys_addr_t base, 
		base = addr;

	}



	ret = cma_init_reserved_mem(base, size, order_per_bit, res_cma);

	ret = cma_init_reserved_mem(base, size, order_per_bit, name, res_cma);

	if (ret)

		goto err;

mm/cma.h

+1 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ struct cma { 
	struct hlist_head mem_head;

	spinlock_t mem_head_lock;

#endif

	const char *name;

};



extern struct cma cma_areas[MAX_CMA_AREAS];