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: Nikhilesh Reddy <reddyn@codeaurora.org>
[riteshh@codeaurora.org: fixed trivial merge conflicts]
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
diff --git a/drivers/uio/msm_sharedmem/msm_sharedmem.c b/drivers/uio/msm_sharedmem/msm_sharedmem.c
index 68f6211..ac822b1 100644
--- a/drivers/uio/msm_sharedmem/msm_sharedmem.c
+++ b/drivers/uio/msm_sharedmem/msm_sharedmem.c
@@ -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 @@
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 == -EINVAL)
+ 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 @@
}
}
+ /* 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;