C++ (Cpp) fmem_map_virtual_area Examples

Example #1

File: fmem.c Project: Amin-jkr/android_kernel_semc_msm8660-1

static int fmem_probe(struct platform_device *pdev)
{
	struct fmem_platform_data *pdata = pdev->dev.platform_data;

	fmem_data.phys = pdata->phys + pdata->reserved_size_low;
	fmem_data.size = pdata->size - pdata->reserved_size_low -
					pdata->reserved_size_high;
	fmem_data.reserved_size_low = pdata->reserved_size_low;
	fmem_data.reserved_size_high = pdata->reserved_size_high;

	if (!fmem_data.size)
		return -ENODEV;

	fmem_data.area = get_vm_area(fmem_data.size, VM_IOREMAP);
	if (!fmem_data.area)
		return -ENOMEM;

	if (!fmem_map_virtual_area(MT_DEVICE_CACHED)) {
		remove_vm_area(fmem_data.area->addr);
		return -ENOMEM;
	}
	pr_info("fmem phys %lx virt %p size %lx\n",
		fmem_data.phys, fmem_data.virt, fmem_data.size);

	spin_lock_init(&fmem_state_lock);

	return 0;
}

Example #2

File: fmem.c Project: NooNameR/k3_bravo

static int fmem_probe(struct platform_device *pdev)
{
	struct fmem_platform_data *pdata = pdev->dev.platform_data;

#ifdef CONFIG_MEMORY_HOTPLUG
	fmem_section_start = pdata->phys >> PA_SECTION_SHIFT;
	fmem_section_end = (pdata->phys - 1 + pdata->size) >> PA_SECTION_SHIFT;
#endif
	fmem_data.phys = pdata->phys + pdata->reserved_size_low;
	fmem_data.size = pdata->size - pdata->reserved_size_low -
					pdata->reserved_size_high;
	fmem_data.reserved_size_low = pdata->reserved_size_low;
	fmem_data.reserved_size_high = pdata->reserved_size_high;

	if (!fmem_data.size)
		return -ENODEV;

	fmem_data.area = get_vm_area(fmem_data.size, VM_IOREMAP);
	if (!fmem_data.area)
		return -ENOMEM;

	if (!fmem_map_virtual_area(MT_DEVICE_CACHED)) {
		remove_vm_area(fmem_data.area->addr);
		return -ENOMEM;
	}
	pr_info("fmem phys %lx virt %p size %lx\n",
		fmem_data.phys, fmem_data.virt, fmem_data.size);

	spin_lock_init(&fmem_state_lock);

	return 0;
}

Example #3

File: fmem.c Project: JonnyXDA/DarkSense-M7

int fmem_set_state(enum fmem_state new_state)
{
	int ret = 0;
	int create_sysfs = 0;

	lock_fmem_state();
	if (fmem_state == new_state)
		goto out;

	if (fmem_state == FMEM_UNINITIALIZED) {
		if (new_state == FMEM_T_STATE) {
			tmem_enable();
			create_sysfs = 1;
			goto out_set;
		} else {
			ret = -EINVAL;
			goto out;
		}
	}

#ifdef CONFIG_MEMORY_HOTPLUG
	if (fmem_state == FMEM_C_STATE && new_state == FMEM_O_STATE) {
		ret = -EAGAIN;
		goto out;
	}

	if (fmem_state == FMEM_O_STATE && new_state == FMEM_C_STATE) {
		pr_warn("attempting to use powered off memory as fmem\n");
		ret = -EAGAIN;
		goto out;
	}
#endif

	if (new_state == FMEM_T_STATE) {
		void *v;
		v = fmem_map_virtual_area(MT_DEVICE_CACHED);
		if (IS_ERR_OR_NULL(v)) {
			ret = PTR_ERR(v);
			goto out;
		}
		tmem_enable();
	} else {
		tmem_disable();
		fmem_unmap_virtual_area();
	}

out_set:
	fmem_state = new_state;
out:
	unlock_fmem_state();
#ifdef CONFIG_SYSFS
	if (create_sysfs)
		fmem_create_sysfs();
#endif
	return ret;
}

Example #4

File: fmem.c Project: Amin-jkr/android_kernel_semc_msm8660-1

int fmem_set_state(enum fmem_state new_state)
{
	int ret = 0;
	int create_sysfs = 0;

	lock_fmem_state();
	if (fmem_state == new_state)
		goto out;

	if (fmem_state == FMEM_UNINITIALIZED) {
		if (new_state == FMEM_T_STATE) {
			tmem_enable();
			create_sysfs = 1;
			goto out_set;
		}
		if (new_state == FMEM_C_STATE) {
			ret = -EINVAL;
			goto out;
		}
	}

	if (new_state == FMEM_T_STATE) {
		void *v;
		v = fmem_map_virtual_area(MT_DEVICE_CACHED);
		if (IS_ERR_OR_NULL(v)) {
			ret = PTR_ERR(v);
			goto out;
		}
		tmem_enable();
	} else {
		tmem_disable();
		fmem_unmap_virtual_area();
	}

out_set:
	fmem_state = new_state;
out:
	unlock_fmem_state();
#ifdef CONFIG_SYSFS
	if (create_sysfs)
		fmem_create_sysfs();
#endif
	return ret;
}