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uio: msm_sharedmem: shared memory region access is also given to vm-nav

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If vm-nav-path dtsi property is set, then the shared memory region will
be given access to vm-nav-path also.

Change-Id: I0aef894dbee78c2e3d7d67f61a238a889050037a
Signed-off-by: Sridhar Arra <sarra@codeaurora.org>
This commit is contained in:
Sridhar Arra 2019-11-25 16:17:12 +05:30
parent 17978e90e8
commit 5afae6efcd
1 changed files with 29 additions and 8 deletions
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37
drivers/uio/msm_sharedmem/msm_sharedmem.c
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@ -66,21 +66,33 @@ static int sharedmem_mmap(struct uio_info *info, struct vm_area_struct *vma)
}
/* Setup the shared ram permissions.
* This function currently supports the mpss client only.
* This function currently supports the mpss and nav clients only.
*/
static void setup_shared_ram_perms(u32 client_id, phys_addr_t addr, u32 size)
static void setup_shared_ram_perms(u32 client_id, phys_addr_t addr, u32 size,
bool vm_nav_path)
{
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 (vm_nav_path) {
int dest_vmids[3] = {VMID_HLOS, VMID_MSS_MSA, VMID_NAV};
int dest_perms[3] = {PERM_READ|PERM_WRITE,
PERM_READ|PERM_WRITE,
PERM_READ|PERM_WRITE};
ret = hyp_assign_phys(addr, size, source_vmlist, 1, dest_vmids,
dest_perms, 3);
} else {
int dest_vmids[2] = {VMID_HLOS, VMID_MSS_MSA};
int dest_perms[2] = {PERM_READ|PERM_WRITE,
PERM_READ|PERM_WRITE};
ret = hyp_assign_phys(addr, size, source_vmlist, 1, dest_vmids,
dest_perms, 2);
}
if (ret != 0) {
if (ret == -EINVAL)
pr_warn("hyp_assign_phys is not supported!\n");
@ -102,6 +114,7 @@ static int msm_sharedmem_probe(struct platform_device *pdev)
phys_addr_t shared_mem_pyhsical = 0;
bool is_addr_dynamic = false;
bool guard_memory = false;
bool vm_nav_path = false;
/* Get the addresses from platform-data */
if (!pdev->dev.of_node) {
@ -162,8 +175,16 @@ static int msm_sharedmem_probe(struct platform_device *pdev)
shared_mem_pyhsical += SZ_4K;
}
/*
* If this dtsi property is set, then the shared memory region
* will be given access to vm-nav-path also.
*/
vm_nav_path = of_property_read_bool(pdev->dev.of_node,
"qcom,vm-nav-path");
/* Set up the permissions for the shared ram that was allocated. */
setup_shared_ram_perms(client_id, shared_mem_pyhsical, shared_mem_size);
setup_shared_ram_perms(client_id, shared_mem_pyhsical, shared_mem_size,
vm_nav_path);
/* Setup device */
info->mmap = sharedmem_mmap; /* Custom mmap function. */