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Commit 5842243b authored by Nikhilesh Reddy's avatar Nikhilesh Reddy Committed by Gerrit - the friendly Code Review server
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uio: msm_sharedmem: Add support for HYP call 



Add support for HYP call to setup the sharedmem permissions
for the MPSS client.

Change-Id: I3b48ae962865d8d0a0ea6e3fbb8e21278b59c690
Signed-off-by: default avatarNikhilesh Reddy <reddyn@codeaurora.org>
parent ff82f09c

drivers/uio/msm_sharedmem/msm_sharedmem.c

+33 −0
Original line number Diff line number Diff line
@@ -19,10 +19,15 @@ 
#include <linux/err.h>

#include <linux/of.h>

#include <linux/dma-mapping.h>



#include <soc/qcom/secure_buffer.h>



#include "sharedmem_qmi.h"



#define CLIENT_ID_PROP "qcom,client-id"



#define MPSS_RMTS_CLIENT_ID 1



static int uio_get_mem_index(struct uio_info *info, struct vm_area_struct *vma)

{

	if (vma->vm_pgoff >= MAX_UIO_MAPS)
@@ -70,6 +75,31 @@ static int sharedmem_mmap(struct uio_info *info, struct vm_area_struct *vma) 
	return result;

}



/* Setup the shared ram permissions.

 * This function currently supports the mpss client only.

 */

static void setup_shared_ram_perms(u32 client_id, phys_addr_t addr, u32 size)

{

	int ret;

	u32 source_vmlist[1] = {VMID_HLOS};

	int dest_vmids[2] = {VMID_HLOS, VMID_MSS_MSA};

	int dest_perms[2] = {PERM_READ|PERM_WRITE ,

			     PERM_READ|PERM_WRITE};



	if (client_id != MPSS_RMTS_CLIENT_ID)

		return;



	ret = hyp_assign_phys(addr, size, source_vmlist, 1, dest_vmids,

				dest_perms, 2);

	if (ret != 0) {

		if (ret == -ENOSYS)

			pr_warn("hyp_assign_phys is not supported!");

		else

			pr_err("hyp_assign_phys failed IPA=0x%016llX size=%u err=%d\n",

				addr, size, ret);

	}

}



static int msm_sharedmem_probe(struct platform_device *pdev)

{

	int ret = 0;
@@ -124,6 +154,9 @@ static int msm_sharedmem_probe(struct platform_device *pdev) 
		}

	}



	/* Set up the permissions for the shared ram that was allocated. */

	setup_shared_ram_perms(client_id, shared_mem_pyhsical, shared_mem_size);



	/* Setup device */

	info->mmap = sharedmem_mmap; /* Custom mmap function. */

	info->name = clnt_res->name;