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Commit 4543a7e5 authored by Vishwanath Raju K's avatar Vishwanath Raju K
Browse files

mm: cma: add new cma api wrapper for hyp_assign 



A new API for modules to hyp_assign entire dev cma area.

Change-Id: I2206f4dd9a08aa719776b3f5a40d805ca48181c9
Signed-off-by: default avatarVishwanath Raju K <vishk@codeaurora.org>
parent 2d0bbcbf

drivers/soc/qcom/secure_buffer.c

+28 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <linux/scatterlist.h>

#include <linux/slab.h>

#include <linux/dma-mapping.h>

#include <linux/cma.h>

#include <soc/qcom/scm.h>

#include <soc/qcom/secure_buffer.h>
@@ -413,6 +414,33 @@ int hyp_assign_phys(phys_addr_t addr, u64 size, u32 *source_vm_list, 
}

EXPORT_SYMBOL(hyp_assign_phys);



int cma_hyp_assign_phys(struct device *dev, u32 *source_vm_list,

				int source_nelems, int *dest_vmids,

					int *dest_perms, int dest_nelems)

{

	phys_addr_t addr;

	u64 size;

	struct cma *cma = NULL;

	int ret;



	if (dev && dev->cma_area)

		cma = dev->cma_area;



	if (cma) {

		addr = cma_get_base(cma);

		size = (size_t)cma_get_size(cma);

	} else {

		return -ENOMEM;

	}



	ret = hyp_assign_phys(addr, size, source_vm_list,

				source_nelems, dest_vmids,

					dest_perms, dest_nelems);



	return ret;

}

EXPORT_SYMBOL(cma_hyp_assign_phys);



const char *msm_secure_vmid_to_string(int secure_vmid)

{

	switch (secure_vmid) {

include/soc/qcom/secure_buffer.h

+13 −0
Original line number Diff line number Diff line
@@ -66,6 +66,12 @@ int try_hyp_assign_table(struct sg_table *table, 
extern int hyp_assign_phys(phys_addr_t addr, u64 size,

			u32 *source_vmlist, int source_nelems,

			int *dest_vmids, int *dest_perms, int dest_nelems);





extern int cma_hyp_assign_phys(struct device *dev, u32 *source_vm_list,

				int source_nelems, int *dest_vmids,

					int *dest_perms, int dest_nelems);



bool msm_secure_v2_is_supported(void);

const char *msm_secure_vmid_to_string(int secure_vmid);

#else
@@ -102,6 +108,13 @@ static inline int hyp_assign_phys(phys_addr_t addr, u64 size, 
	return -EINVAL;

}



static inline int cma_hyp_assign_phys(struct device *dev, u32 *source_vm_list,

				int source_nelems, int *dest_vmids,

					int *dest_perms, int dest_nelems)

{

	return -EINVAL;

}



static inline bool msm_secure_v2_is_supported(void)

{

	return false;