C++ (Cpp) cma_activate_area 예제들

예제 #1

파일: dma-contiguous.c 프로젝트: alsandeep/kernel-4.x

static __init struct cma *cma_create_area(unsigned long base_pfn,
				     unsigned long count)
{
	int bitmap_size = BITS_TO_LONGS(count) * sizeof(long);
	struct cma *cma;
	int ret = -ENOMEM;

	pr_debug("%s(base %08lx, count %lx)\n", __func__, base_pfn, count);

	cma = kmalloc(sizeof *cma, GFP_KERNEL);
	if (!cma)
		return ERR_PTR(-ENOMEM);

	cma->base_pfn = base_pfn;
	cma->count = count;
	cma->bitmap = kzalloc(bitmap_size, GFP_KERNEL);

	if (!cma->bitmap)
		goto no_mem;

	ret = cma_activate_area(base_pfn, count);
	if (ret)
		goto error;

	pr_debug("%s: returned %p\n", __func__, (void *)cma);
	return cma;

error:
	kfree(cma->bitmap);
no_mem:
	kfree(cma);
	return ERR_PTR(ret);
}

예제 #2

파일: dma-contiguous.c 프로젝트: ColinIanKing/m576

static int __init cma_init_reserved_areas(void)
{
	int i;

	for (i = 0; i < cma_area_count; i++) {
		int ret = cma_activate_area(&cma_areas[i]);
		if (ret)
			return ret;
	}

	return 0;
}

예제 #3

파일: dma-contiguous.c 프로젝트: acorn-marvell/brillo_pxa_kernel

static int __init cma_init_reserved_areas(void)
{
	int i;

	if (!cma_available)
		return 0;

	for (i = 0; i < cma_area_count; i++) {
		int ret = cma_activate_area(&cma_areas[i]);
		if (ret)
			return ret;
	}

	proc_create("cmainfo", S_IRUGO, NULL, &cma_info_fops);
	return 0;
}

예제 #4

파일: dma-contiguous.c 프로젝트: XePeleato/android_kernel_huawei_venus

static int __init cma_init_reserved_areas(void)
{
	int i;

	for (i = 0; i < cma_area_count; i++) {
		int ret = cma_activate_area(&cma_areas[i]);
		if (ret)
			return ret;
		pr_err("cma base %llx  cma size %lu\n",
				__pfn_to_phys(cma_areas[i].base_pfn),
				(cma_areas[i].count<<PAGE_SHIFT)/SZ_1M);
	}

	hisi_cma_dev_init();

	return 0;
}