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Commit 97fb77dc authored by Jake Oshins's avatar Jake Oshins Committed by Greg Kroah-Hartman
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drivers:hv: Make a function to free mmio regions through vmbus 



This patch introduces a function that reverses everything
done by vmbus_allocate_mmio().  Existing code just called
release_mem_region().  Future patches in this series
require a more complex sequence of actions, so this function
is introduced to wrap those actions.

Signed-off-by: default avatarJake Oshins <jakeo@microsoft.com>
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e16dad6b

drivers/hv/vmbus_drv.c

+15 −0
Original line number Original line Diff line number Diff line
@@ -1187,6 +1187,21 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, 
}

}

EXPORT_SYMBOL_GPL(vmbus_allocate_mmio);

EXPORT_SYMBOL_GPL(vmbus_allocate_mmio);





/**

 * vmbus_free_mmio() - Free a memory-mapped I/O range.

 * @start:		Base address of region to release.

 * @size:		Size of the range to be allocated

 *

 * This function releases anything requested by

 * vmbus_mmio_allocate().

 */

void vmbus_free_mmio(resource_size_t start, resource_size_t size)

{

	release_mem_region(start, size);



}

EXPORT_SYMBOL_GPL(vmbus_free_mmio);



/**

/**

 * vmbus_cpu_number_to_vp_number() - Map CPU to VP.

 * vmbus_cpu_number_to_vp_number() - Map CPU to VP.

 * @cpu_number: CPU number in Linux terms

 * @cpu_number: CPU number in Linux terms

include/linux/hyperv.h

+1 −1
Original line number Original line Diff line number Diff line
@@ -1120,7 +1120,7 @@ int vmbus_allocate_mmio(struct resource **new, struct hv_device *device_obj, 
			resource_size_t min, resource_size_t max,

			resource_size_t min, resource_size_t max,

			resource_size_t size, resource_size_t align,

			resource_size_t size, resource_size_t align,

			bool fb_overlap_ok);

			bool fb_overlap_ok);



void vmbus_free_mmio(resource_size_t start, resource_size_t size);

int vmbus_cpu_number_to_vp_number(int cpu_number);

int vmbus_cpu_number_to_vp_number(int cpu_number);

u64 hv_do_hypercall(u64 control, void *input, void *output);

u64 hv_do_hypercall(u64 control, void *input, void *output);