Adding upstream version 6.10.3.upstream/6.10.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

22 files changed, 677 insertions, 139 deletions

diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig
index 73a147202e..61b507c187 100644
--- a/drivers/tee/Kconfig
+++ b/drivers/tee/Kconfig
@@ -15,5 +15,6 @@ if TEE
 
 source "drivers/tee/optee/Kconfig"
 source "drivers/tee/amdtee/Kconfig"
+source "drivers/tee/tstee/Kconfig"
 
 endif
diff --git a/drivers/tee/Makefile b/drivers/tee/Makefile
index 68da044afb..5488cba30b 100644
--- a/drivers/tee/Makefile
+++ b/drivers/tee/Makefile
@@ -5,3 +5,4 @@ tee-objs += tee_shm.o
 tee-objs += tee_shm_pool.o
 obj-$(CONFIG_OPTEE) += optee/
 obj-$(CONFIG_AMDTEE) += amdtee/
+obj-$(CONFIG_ARM_TSTEE) += tstee/
diff --git a/drivers/tee/amdtee/amdtee_private.h b/drivers/tee/amdtee/amdtee_private.h
index 6d0f7062bb..d870500338 100644
--- a/drivers/tee/amdtee/amdtee_private.h
+++ b/drivers/tee/amdtee/amdtee_private.h
@@ -9,7 +9,7 @@
 
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/kref.h>
 #include <linux/types.h>
 #include "amdtee_if.h"
diff --git a/drivers/tee/amdtee/call.c b/drivers/tee/amdtee/call.c
index e9b63dcb31..4c21b02be4 100644
--- a/drivers/tee/amdtee/call.c
+++ b/drivers/tee/amdtee/call.c
@@ -5,7 +5,7 @@
 
 #include <linux/device.h>
 #include <linux/tee.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/psp-tee.h>
 #include <linux/slab.h>
 #include <linux/psp.h>
diff --git a/drivers/tee/amdtee/core.c b/drivers/tee/amdtee/core.c
index 3c15f6a9e9..e487231d25 100644
--- a/drivers/tee/amdtee/core.c
+++ b/drivers/tee/amdtee/core.c
@@ -9,13 +9,12 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/device.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include <linux/mm.h>
 #include <linux/uaccess.h>
 #include <linux/firmware.h>
 #include "amdtee_private.h"
-#include "../tee_private.h"
 #include <linux/psp-tee.h>
 
 static struct amdtee_driver_data *drv_data;
diff --git a/drivers/tee/amdtee/shm_pool.c b/drivers/tee/amdtee/shm_pool.c
index f0303126f1..6346e0bc8a 100644
--- a/drivers/tee/amdtee/shm_pool.c
+++ b/drivers/tee/amdtee/shm_pool.c
@@ -4,7 +4,7 @@
  */
 
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/psp.h>
 #include "amdtee_private.h"
 
diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index a91e50be11..16eb953e14 100644
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -7,7 +7,7 @@
 #include <linux/errno.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include "optee_private.h"
 
diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
index 3aed554bc8..39e688d4e9 100644
--- a/drivers/tee/optee/core.c
+++ b/drivers/tee/optee/core.c
@@ -9,77 +9,13 @@
 #include <linux/crash_dump.h>
 #include <linux/errno.h>
 #include <linux/io.h>
-#include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/string.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include "optee_private.h"
 
-int optee_pool_op_alloc_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
-			       size_t size, size_t align,
-			       int (*shm_register)(struct tee_context *ctx,
-						   struct tee_shm *shm,
-						   struct page **pages,
-						   size_t num_pages,
-						   unsigned long start))
-{
-	size_t nr_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE;
-	struct page **pages;
-	unsigned int i;
-	int rc = 0;
-
-	/*
-	 * Ignore alignment since this is already going to be page aligned
-	 * and there's no need for any larger alignment.
-	 */
-	shm->kaddr = alloc_pages_exact(nr_pages * PAGE_SIZE,
-				       GFP_KERNEL | __GFP_ZERO);
-	if (!shm->kaddr)
-		return -ENOMEM;
-
-	shm->paddr = virt_to_phys(shm->kaddr);
-	shm->size = nr_pages * PAGE_SIZE;
-
-	pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);
-	if (!pages) {
-		rc = -ENOMEM;
-		goto err;
-	}
-
-	for (i = 0; i < nr_pages; i++)
-		pages[i] = virt_to_page((u8 *)shm->kaddr + i * PAGE_SIZE);
-
-	shm->pages = pages;
-	shm->num_pages = nr_pages;
-
-	if (shm_register) {
-		rc = shm_register(shm->ctx, shm, pages, nr_pages,
-				  (unsigned long)shm->kaddr);
-		if (rc)
-			goto err;
-	}
-
-	return 0;
-err:
-	free_pages_exact(shm->kaddr, shm->size);
-	shm->kaddr = NULL;
-	return rc;
-}
-
-void optee_pool_op_free_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
-			       int (*shm_unregister)(struct tee_context *ctx,
-						     struct tee_shm *shm))
-{
-	if (shm_unregister)
-		shm_unregister(shm->ctx, shm);
-	free_pages_exact(shm->kaddr, shm->size);
-	shm->kaddr = NULL;
-	kfree(shm->pages);
-	shm->pages = NULL;
-}
-
 static void optee_bus_scan(struct work_struct *work)
 {
 	WARN_ON(optee_enumerate_devices(PTA_CMD_GET_DEVICES_SUPP));
diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c
index 1892e49a8e..d296c70ddf 100644
--- a/drivers/tee/optee/device.c
+++ b/drivers/tee/optee/device.c
@@ -7,7 +7,7 @@
 
 #include <linux/kernel.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/uuid.h>
 #include "optee_private.h"
 
diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c
index c5a3e25c55..3e73efa51b 100644
--- a/drivers/tee/optee/ffa_abi.c
+++ b/drivers/tee/optee/ffa_abi.c
@@ -11,7 +11,7 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/string.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include "optee_private.h"
 #include "optee_ffa.h"
@@ -374,14 +374,14 @@ static int optee_ffa_shm_unregister_supp(struct tee_context *ctx,
 static int pool_ffa_op_alloc(struct tee_shm_pool *pool,
 			     struct tee_shm *shm, size_t size, size_t align)
 {
-	return optee_pool_op_alloc_helper(pool, shm, size, align,
-					  optee_ffa_shm_register);
+	return tee_dyn_shm_alloc_helper(shm, size, align,
+					optee_ffa_shm_register);
 }
 
 static void pool_ffa_op_free(struct tee_shm_pool *pool,
 			     struct tee_shm *shm)
 {
-	optee_pool_op_free_helper(pool, shm, optee_ffa_shm_unregister);
+	tee_dyn_shm_free_helper(shm, optee_ffa_shm_unregister);
 }
 
 static void pool_ffa_op_destroy_pool(struct tee_shm_pool *pool)
diff --git a/drivers/tee/optee/notif.c b/drivers/tee/optee/notif.c
index 05212842b0..0d7878e770 100644
--- a/drivers/tee/optee/notif.c
+++ b/drivers/tee/optee/notif.c
@@ -9,7 +9,7 @@
 #include <linux/errno.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include "optee_private.h"
 
 struct notif_entry {
diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h
index 7a5243c78b..429cc20be5 100644
--- a/drivers/tee/optee/optee_private.h
+++ b/drivers/tee/optee/optee_private.h
@@ -9,7 +9,7 @@
 #include <linux/arm-smccc.h>
 #include <linux/rhashtable.h>
 #include <linux/semaphore.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include "optee_msg.h"
 
@@ -283,18 +283,6 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session);
 int optee_enumerate_devices(u32 func);
 void optee_unregister_devices(void);
 
-int optee_pool_op_alloc_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
-			       size_t size, size_t align,
-			       int (*shm_register)(struct tee_context *ctx,
-						   struct tee_shm *shm,
-						   struct page **pages,
-						   size_t num_pages,
-						   unsigned long start));
-void optee_pool_op_free_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
-			       int (*shm_unregister)(struct tee_context *ctx,
-						     struct tee_shm *shm));
-
-
 void optee_remove_common(struct optee *optee);
 int optee_open(struct tee_context *ctx, bool cap_memref_null);
 void optee_release(struct tee_context *ctx);
diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
index e69bc63806..f086812f11 100644
--- a/drivers/tee/optee/rpc.c
+++ b/drivers/tee/optee/rpc.c
@@ -8,7 +8,7 @@
 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include "optee_private.h"
 #include "optee_rpc_cmd.h"
 
diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c
index a37f87087e..844285d4f0 100644
--- a/drivers/tee/optee/smc_abi.c
+++ b/drivers/tee/optee/smc_abi.c
@@ -23,7 +23,7 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/string.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/types.h>
 #include <linux/workqueue.h>
 #include "optee_private.h"
@@ -592,19 +592,18 @@ static int pool_op_alloc(struct tee_shm_pool *pool,
 	 * to be registered with OP-TEE.
 	 */
 	if (shm->flags & TEE_SHM_PRIV)
-		return optee_pool_op_alloc_helper(pool, shm, size, align, NULL);
+		return tee_dyn_shm_alloc_helper(shm, size, align, NULL);
 
-	return optee_pool_op_alloc_helper(pool, shm, size, align,
-					  optee_shm_register);
+	return tee_dyn_shm_alloc_helper(shm, size, align, optee_shm_register);
 }
 
 static void pool_op_free(struct tee_shm_pool *pool,
 			 struct tee_shm *shm)
 {
 	if (!(shm->flags & TEE_SHM_PRIV))
-		optee_pool_op_free_helper(pool, shm, optee_shm_unregister);
+		tee_dyn_shm_free_helper(shm, optee_shm_unregister);
 	else
-		optee_pool_op_free_helper(pool, shm, NULL);
+		tee_dyn_shm_free_helper(shm, NULL);
 }
 
 static void pool_op_destroy_pool(struct tee_shm_pool *pool)
@@ -1433,7 +1432,7 @@ static optee_invoke_fn *get_invoke_func(struct device *dev)
  * optee_remove is called by platform subsystem to alert the driver
  * that it should release the device
  */
-static int optee_smc_remove(struct platform_device *pdev)
+static void optee_smc_remove(struct platform_device *pdev)
 {
 	struct optee *optee = platform_get_drvdata(pdev);
 
@@ -1453,8 +1452,6 @@ static int optee_smc_remove(struct platform_device *pdev)
 		memunmap(optee->smc.memremaped_shm);
 
 	kfree(optee);
-
-	return 0;
 }
 
 /* optee_shutdown - Device Removal Routine
@@ -1806,7 +1803,7 @@ MODULE_DEVICE_TABLE(of, optee_dt_match);
 
 static struct platform_driver optee_driver = {
 	.probe  = optee_probe,
-	.remove = optee_smc_remove,
+	.remove_new = optee_smc_remove,
 	.shutdown = optee_shutdown,
 	.driver = {
 		.name = "optee",
diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
index e59c20d74b..82ad095d2b 100644
--- a/drivers/tee/tee_core.c
+++ b/drivers/tee/tee_core.c
@@ -11,7 +11,7 @@
 #include <linux/idr.h>
 #include <linux/module.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/uaccess.h>
 #include <crypto/hash.h>
 #include <crypto/sha1.h>
diff --git a/drivers/tee/tee_private.h b/drivers/tee/tee_private.h
index 754e11dcb2..9bc5060522 100644
--- a/drivers/tee/tee_private.h
+++ b/drivers/tee/tee_private.h
@@ -12,41 +12,6 @@
 #include <linux/mutex.h>
 #include <linux/types.h>
 
-#define TEE_DEVICE_FLAG_REGISTERED	0x1
-#define TEE_MAX_DEV_NAME_LEN		32
-
-/**
- * struct tee_device - TEE Device representation
- * @name:	name of device
- * @desc:	description of device
- * @id:		unique id of device
- * @flags:	represented by TEE_DEVICE_FLAG_REGISTERED above
- * @dev:	embedded basic device structure
- * @cdev:	embedded cdev
- * @num_users:	number of active users of this device
- * @c_no_user:	completion used when unregistering the device
- * @mutex:	mutex protecting @num_users and @idr
- * @idr:	register of user space shared memory objects allocated or
- *		registered on this device
- * @pool:	shared memory pool
- */
-struct tee_device {
-	char name[TEE_MAX_DEV_NAME_LEN];
-	const struct tee_desc *desc;
-	int id;
-	unsigned int flags;
-
-	struct device dev;
-	struct cdev cdev;
-
-	size_t num_users;
-	struct completion c_no_users;
-	struct mutex mutex;	/* protects num_users and idr */
-
-	struct idr idr;
-	struct tee_shm_pool *pool;
-};
-
 int tee_shm_get_fd(struct tee_shm *shm);
 
 bool tee_device_get(struct tee_device *teedev);
diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c
index 731d9028b6..daf6e5cfd5 100644
--- a/drivers/tee/tee_shm.c
+++ b/drivers/tee/tee_shm.c
@@ -5,10 +5,11 @@
 #include <linux/anon_inodes.h>
 #include <linux/device.h>
 #include <linux/idr.h>
+#include <linux/io.h>
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include <linux/uaccess.h>
 #include <linux/uio.h>
 #include <linux/highmem.h>
@@ -202,6 +203,70 @@ struct tee_shm *tee_shm_alloc_priv_buf(struct tee_context *ctx, size_t size)
 }
 EXPORT_SYMBOL_GPL(tee_shm_alloc_priv_buf);
 
+int tee_dyn_shm_alloc_helper(struct tee_shm *shm, size_t size, size_t align,
+			     int (*shm_register)(struct tee_context *ctx,
+						 struct tee_shm *shm,
+						 struct page **pages,
+						 size_t num_pages,
+						 unsigned long start))
+{
+	size_t nr_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE;
+	struct page **pages;
+	unsigned int i;
+	int rc = 0;
+
+	/*
+	 * Ignore alignment since this is already going to be page aligned
+	 * and there's no need for any larger alignment.
+	 */
+	shm->kaddr = alloc_pages_exact(nr_pages * PAGE_SIZE,
+				       GFP_KERNEL | __GFP_ZERO);
+	if (!shm->kaddr)
+		return -ENOMEM;
+
+	shm->paddr = virt_to_phys(shm->kaddr);
+	shm->size = nr_pages * PAGE_SIZE;
+
+	pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);
+	if (!pages) {
+		rc = -ENOMEM;
+		goto err;
+	}
+
+	for (i = 0; i < nr_pages; i++)
+		pages[i] = virt_to_page((u8 *)shm->kaddr + i * PAGE_SIZE);
+
+	shm->pages = pages;
+	shm->num_pages = nr_pages;
+
+	if (shm_register) {
+		rc = shm_register(shm->ctx, shm, pages, nr_pages,
+				  (unsigned long)shm->kaddr);
+		if (rc)
+			goto err;
+	}
+
+	return 0;
+err:
+	free_pages_exact(shm->kaddr, shm->size);
+	shm->kaddr = NULL;
+	return rc;
+}
+EXPORT_SYMBOL_GPL(tee_dyn_shm_alloc_helper);
+
+void tee_dyn_shm_free_helper(struct tee_shm *shm,
+			     int (*shm_unregister)(struct tee_context *ctx,
+						   struct tee_shm *shm))
+{
+	if (shm_unregister)
+		shm_unregister(shm->ctx, shm);
+	free_pages_exact(shm->kaddr, shm->size);
+	shm->kaddr = NULL;
+	kfree(shm->pages);
+	shm->pages = NULL;
+}
+EXPORT_SYMBOL_GPL(tee_dyn_shm_free_helper);
+
 static struct tee_shm *
 register_shm_helper(struct tee_context *ctx, struct iov_iter *iter, u32 flags,
 		    int id)
diff --git a/drivers/tee/tee_shm_pool.c b/drivers/tee/tee_shm_pool.c
index 058bfbac65..80004b5562 100644
--- a/drivers/tee/tee_shm_pool.c
+++ b/drivers/tee/tee_shm_pool.c
@@ -6,7 +6,7 @@
 #include <linux/dma-buf.h>
 #include <linux/genalloc.h>
 #include <linux/slab.h>
-#include <linux/tee_drv.h>
+#include <linux/tee_core.h>
 #include "tee_private.h"
 
 static int pool_op_gen_alloc(struct tee_shm_pool *pool, struct tee_shm *shm,
diff --git a/drivers/tee/tstee/Kconfig b/drivers/tee/tstee/Kconfig
new file mode 100644
index 0000000000..d32f91d473
--- /dev/null
+++ b/drivers/tee/tstee/Kconfig
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config ARM_TSTEE
+	tristate "Arm Trusted Services TEE driver"
+	depends on ARM_FFA_TRANSPORT
+	default n
+	help
+	  The Trusted Services project provides a framework for developing and
+	  deploying device Root of Trust services in FF-A Secure Partitions.
+	  This driver provides an interface to make Trusted Services Secure
+	  Partitions accessible for user space clients, since the FF-A driver
+	  doesn't implement a user space interface directly.
diff --git a/drivers/tee/tstee/Makefile b/drivers/tee/tstee/Makefile
new file mode 100644
index 0000000000..5227020ebd
--- /dev/null
+++ b/drivers/tee/tstee/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+arm-tstee-objs := core.o
+obj-$(CONFIG_ARM_TSTEE) = arm-tstee.o
diff --git a/drivers/tee/tstee/core.c b/drivers/tee/tstee/core.c
new file mode 100644
index 0000000000..533425e9e9
--- /dev/null
+++ b/drivers/tee/tstee/core.c
@@ -0,0 +1,480 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2023, Arm Limited
+ */
+
+#include <linux/arm_ffa.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/limits.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/tee_core.h>
+#include <linux/types.h>
+#include <linux/uuid.h>
+#include <linux/xarray.h>
+#include "tstee_private.h"
+
+#define FFA_DIRECT_REQ_ARG_NUM 5
+#define FFA_INVALID_MEM_HANDLE U64_MAX
+
+static void arg_list_to_ffa_data(const u32 *args,
+				 struct ffa_send_direct_data *data)
+{
+	data->data0 = args[0];
+	data->data1 = args[1];
+	data->data2 = args[2];
+	data->data3 = args[3];
+	data->data4 = args[4];
+}
+
+static void arg_list_from_ffa_data(const struct ffa_send_direct_data *data,
+				   u32 *args)
+{
+	args[0] = lower_32_bits(data->data0);
+	args[1] = lower_32_bits(data->data1);
+	args[2] = lower_32_bits(data->data2);
+	args[3] = lower_32_bits(data->data3);
+	args[4] = lower_32_bits(data->data4);
+}
+
+static void tstee_get_version(struct tee_device *teedev,
+			      struct tee_ioctl_version_data *vers)
+{
+	struct tstee *tstee = tee_get_drvdata(teedev);
+	struct tee_ioctl_version_data v = {
+		.impl_id = TEE_IMPL_ID_TSTEE,
+		/* FF-A endpoint ID only uses the lower 16 bits */
+		.impl_caps = lower_16_bits(tstee->ffa_dev->vm_id),
+		.gen_caps = 0,
+	};
+
+	*vers = v;
+}
+
+static int tstee_open(struct tee_context *ctx)
+{
+	struct ts_context_data *ctxdata;
+
+	ctxdata = kzalloc(sizeof(*ctxdata), GFP_KERNEL);
+	if (!ctxdata)
+		return -ENOMEM;
+
+	xa_init_flags(&ctxdata->sess_list, XA_FLAGS_ALLOC);
+
+	ctx->data = ctxdata;
+
+	return 0;
+}
+
+static void tstee_release(struct tee_context *ctx)
+{
+	struct ts_context_data *ctxdata = ctx->data;
+	struct ts_session *sess;
+	unsigned long idx;
+
+	if (!ctxdata)
+		return;
+
+	xa_for_each(&ctxdata->sess_list, idx, sess) {
+		xa_erase(&ctxdata->sess_list, idx);
+		kfree(sess);
+	}
+
+	xa_destroy(&ctxdata->sess_list);
+
+	kfree(ctxdata);
+	ctx->data = NULL;
+}
+
+static int tstee_open_session(struct tee_context *ctx,
+			      struct tee_ioctl_open_session_arg *arg,
+			      struct tee_param *param __always_unused)
+{
+	struct tstee *tstee = tee_get_drvdata(ctx->teedev);
+	struct ffa_device *ffa_dev = tstee->ffa_dev;
+	struct ts_context_data *ctxdata = ctx->data;
+	struct ffa_send_direct_data ffa_data;
+	struct ts_session *sess = NULL;
+	u32 ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {};
+	u32 sess_id;
+	int rc;
+
+	ffa_args[TS_RPC_CTRL_REG] =
+		TS_RPC_CTRL_PACK_IFACE_OPCODE(TS_RPC_MGMT_IFACE_ID,
+					      TS_RPC_OP_SERVICE_INFO);
+
+	memcpy(ffa_args + TS_RPC_SERVICE_INFO_UUID0, arg->uuid, UUID_SIZE);
+
+	arg_list_to_ffa_data(ffa_args, &ffa_data);
+	rc = ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data);
+	if (rc)
+		return rc;
+
+	arg_list_from_ffa_data(&ffa_data, ffa_args);
+
+	if (ffa_args[TS_RPC_SERVICE_INFO_RPC_STATUS] != TS_RPC_OK)
+		return -ENODEV;
+
+	if (ffa_args[TS_RPC_SERVICE_INFO_IFACE] > U8_MAX)
+		return -EINVAL;
+
+	sess = kzalloc(sizeof(*sess), GFP_KERNEL);
+	if (!sess)
+		return -ENOMEM;
+
+	sess->iface_id = ffa_args[TS_RPC_SERVICE_INFO_IFACE];
+
+	rc = xa_alloc(&ctxdata->sess_list, &sess_id, sess, xa_limit_32b,
+		      GFP_KERNEL);
+	if (rc) {
+		kfree(sess);
+		return rc;
+	}
+
+	arg->session = sess_id;
+	arg->ret = 0;
+
+	return 0;
+}
+
+static int tstee_close_session(struct tee_context *ctx, u32 session)
+{
+	struct ts_context_data *ctxdata = ctx->data;
+	struct ts_session *sess;
+
+	/* Calls xa_lock() internally */
+	sess = xa_erase(&ctxdata->sess_list, session);
+	if (!sess)
+		return -EINVAL;
+
+	kfree(sess);
+
+	return 0;
+}
+
+static int tstee_invoke_func(struct tee_context *ctx,
+			     struct tee_ioctl_invoke_arg *arg,
+			     struct tee_param *param)
+{
+	struct tstee *tstee = tee_get_drvdata(ctx->teedev);
+	struct ffa_device *ffa_dev = tstee->ffa_dev;
+	struct ts_context_data *ctxdata = ctx->data;
+	struct ffa_send_direct_data ffa_data;
+	struct tee_shm *shm = NULL;
+	struct ts_session *sess;
+	u32 req_len, ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {};
+	int shm_id, rc;
+	u8 iface_id;
+	u64 handle;
+	u16 opcode;
+
+	xa_lock(&ctxdata->sess_list);
+	sess = xa_load(&ctxdata->sess_list, arg->session);
+
+	/*
+	 * Do this while holding the lock to make sure that the session wasn't
+	 * closed meanwhile
+	 */
+	if (sess)
+		iface_id = sess->iface_id;
+
+	xa_unlock(&ctxdata->sess_list);
+	if (!sess)
+		return -EINVAL;
+
+	opcode = lower_16_bits(arg->func);
+	shm_id = lower_32_bits(param[0].u.value.a);
+	req_len = lower_32_bits(param[0].u.value.b);
+
+	if (shm_id != 0) {
+		shm = tee_shm_get_from_id(ctx, shm_id);
+		if (IS_ERR(shm))
+			return PTR_ERR(shm);
+
+		if (shm->size < req_len) {
+			dev_err(&ffa_dev->dev,
+				"request doesn't fit into shared memory buffer\n");
+			rc = -EINVAL;
+			goto out;
+		}
+
+		handle = shm->sec_world_id;
+	} else {
+		handle = FFA_INVALID_MEM_HANDLE;
+	}
+
+	ffa_args[TS_RPC_CTRL_REG] = TS_RPC_CTRL_PACK_IFACE_OPCODE(iface_id,
+								  opcode);
+	ffa_args[TS_RPC_SERVICE_MEM_HANDLE_LSW] = lower_32_bits(handle);
+	ffa_args[TS_RPC_SERVICE_MEM_HANDLE_MSW] = upper_32_bits(handle);
+	ffa_args[TS_RPC_SERVICE_REQ_LEN] = req_len;
+	ffa_args[TS_RPC_SERVICE_CLIENT_ID] = 0;
+
+	arg_list_to_ffa_data(ffa_args, &ffa_data);
+	rc = ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data);
+	if (rc)
+		goto out;
+
+	arg_list_from_ffa_data(&ffa_data, ffa_args);
+
+	if (ffa_args[TS_RPC_SERVICE_RPC_STATUS] != TS_RPC_OK) {
+		dev_err(&ffa_dev->dev, "invoke_func rpc status: %d\n",
+			ffa_args[TS_RPC_SERVICE_RPC_STATUS]);
+		rc = -EINVAL;
+		goto out;
+	}
+
+	arg->ret = ffa_args[TS_RPC_SERVICE_STATUS];
+	if (shm && shm->size >= ffa_args[TS_RPC_SERVICE_RESP_LEN])
+		param[0].u.value.a = ffa_args[TS_RPC_SERVICE_RESP_LEN];
+
+out:
+	if (shm)
+		tee_shm_put(shm);
+
+	return rc;
+}
+
+static int tstee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
+			      struct page **pages, size_t num_pages,
+			      unsigned long start __always_unused)
+{
+	struct tstee *tstee = tee_get_drvdata(ctx->teedev);
+	struct ffa_device *ffa_dev = tstee->ffa_dev;
+	struct ffa_mem_region_attributes mem_attr = {
+		.receiver = tstee->ffa_dev->vm_id,
+		.attrs = FFA_MEM_RW,
+		.flag = 0,
+	};
+	struct ffa_mem_ops_args mem_args = {
+		.attrs = &mem_attr,
+		.use_txbuf = true,
+		.nattrs = 1,
+		.flags = 0,
+	};
+	struct ffa_send_direct_data ffa_data;
+	struct sg_table sgt;
+	u32 ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {};
+	int rc;
+
+	rc = sg_alloc_table_from_pages(&sgt, pages, num_pages, 0,
+				       num_pages * PAGE_SIZE, GFP_KERNEL);
+	if (rc)
+		return rc;
+
+	mem_args.sg = sgt.sgl;
+	rc = ffa_dev->ops->mem_ops->memory_share(&mem_args);
+	sg_free_table(&sgt);
+	if (rc)
+		return rc;
+
+	shm->sec_world_id = mem_args.g_handle;
+
+	ffa_args[TS_RPC_CTRL_REG] =
+			TS_RPC_CTRL_PACK_IFACE_OPCODE(TS_RPC_MGMT_IFACE_ID,
+						      TS_RPC_OP_RETRIEVE_MEM);
+	ffa_args[TS_RPC_RETRIEVE_MEM_HANDLE_LSW] =
+			lower_32_bits(shm->sec_world_id);
+	ffa_args[TS_RPC_RETRIEVE_MEM_HANDLE_MSW] =
+			upper_32_bits(shm->sec_world_id);
+	ffa_args[TS_RPC_RETRIEVE_MEM_TAG_LSW] = 0;
+	ffa_args[TS_RPC_RETRIEVE_MEM_TAG_MSW] = 0;
+
+	arg_list_to_ffa_data(ffa_args, &ffa_data);
+	rc = ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data);
+	if (rc) {
+		(void)ffa_dev->ops->mem_ops->memory_reclaim(shm->sec_world_id,
+							    0);
+		return rc;
+	}
+
+	arg_list_from_ffa_data(&ffa_data, ffa_args);
+
+	if (ffa_args[TS_RPC_RETRIEVE_MEM_RPC_STATUS] != TS_RPC_OK) {
+		dev_err(&ffa_dev->dev, "shm_register rpc status: %d\n",
+			ffa_args[TS_RPC_RETRIEVE_MEM_RPC_STATUS]);
+		ffa_dev->ops->mem_ops->memory_reclaim(shm->sec_world_id, 0);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int tstee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm)
+{
+	struct tstee *tstee = tee_get_drvdata(ctx->teedev);
+	struct ffa_device *ffa_dev = tstee->ffa_dev;
+	struct ffa_send_direct_data ffa_data;
+	u32 ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {};
+	int rc;
+
+	ffa_args[TS_RPC_CTRL_REG] =
+			TS_RPC_CTRL_PACK_IFACE_OPCODE(TS_RPC_MGMT_IFACE_ID,
+						      TS_RPC_OP_RELINQ_MEM);
+	ffa_args[TS_RPC_RELINQ_MEM_HANDLE_LSW] =
+			lower_32_bits(shm->sec_world_id);
+	ffa_args[TS_RPC_RELINQ_MEM_HANDLE_MSW] =
+			upper_32_bits(shm->sec_world_id);
+
+	arg_list_to_ffa_data(ffa_args, &ffa_data);
+	rc = ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data);
+	if (rc)
+		return rc;
+	arg_list_from_ffa_data(&ffa_data, ffa_args);
+
+	if (ffa_args[TS_RPC_RELINQ_MEM_RPC_STATUS] != TS_RPC_OK) {
+		dev_err(&ffa_dev->dev, "shm_unregister rpc status: %d\n",
+			ffa_args[TS_RPC_RELINQ_MEM_RPC_STATUS]);
+		return -EINVAL;
+	}
+
+	rc = ffa_dev->ops->mem_ops->memory_reclaim(shm->sec_world_id, 0);
+
+	return rc;
+}
+
+static const struct tee_driver_ops tstee_ops = {
+	.get_version = tstee_get_version,
+	.open = tstee_open,
+	.release = tstee_release,
+	.open_session = tstee_open_session,
+	.close_session = tstee_close_session,
+	.invoke_func = tstee_invoke_func,
+};
+
+static const struct tee_desc tstee_desc = {
+	.name = "tstee-clnt",
+	.ops = &tstee_ops,
+	.owner = THIS_MODULE,
+};
+
+static int pool_op_alloc(struct tee_shm_pool *pool, struct tee_shm *shm,
+			 size_t size, size_t align)
+{
+	return tee_dyn_shm_alloc_helper(shm, size, align, tstee_shm_register);
+}
+
+static void pool_op_free(struct tee_shm_pool *pool, struct tee_shm *shm)
+{
+	tee_dyn_shm_free_helper(shm, tstee_shm_unregister);
+}
+
+static void pool_op_destroy_pool(struct tee_shm_pool *pool)
+{
+	kfree(pool);
+}
+
+static const struct tee_shm_pool_ops pool_ops = {
+	.alloc = pool_op_alloc,
+	.free = pool_op_free,
+	.destroy_pool = pool_op_destroy_pool,
+};
+
+static struct tee_shm_pool *tstee_create_shm_pool(void)
+{
+	struct tee_shm_pool *pool = kzalloc(sizeof(*pool), GFP_KERNEL);
+
+	if (!pool)
+		return ERR_PTR(-ENOMEM);
+
+	pool->ops = &pool_ops;
+
+	return pool;
+}
+
+static bool tstee_check_rpc_compatible(struct ffa_device *ffa_dev)
+{
+	struct ffa_send_direct_data ffa_data;
+	u32 ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {};
+
+	ffa_args[TS_RPC_CTRL_REG] =
+			TS_RPC_CTRL_PACK_IFACE_OPCODE(TS_RPC_MGMT_IFACE_ID,
+						      TS_RPC_OP_GET_VERSION);
+
+	arg_list_to_ffa_data(ffa_args, &ffa_data);
+	if (ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data))
+		return false;
+
+	arg_list_from_ffa_data(&ffa_data, ffa_args);
+
+	return ffa_args[TS_RPC_GET_VERSION_RESP] == TS_RPC_PROTOCOL_VERSION;
+}
+
+static int tstee_probe(struct ffa_device *ffa_dev)
+{
+	struct tstee *tstee;
+	int rc;
+
+	ffa_dev->ops->msg_ops->mode_32bit_set(ffa_dev);
+
+	if (!tstee_check_rpc_compatible(ffa_dev))
+		return -EINVAL;
+
+	tstee = kzalloc(sizeof(*tstee), GFP_KERNEL);
+	if (!tstee)
+		return -ENOMEM;
+
+	tstee->ffa_dev = ffa_dev;
+
+	tstee->pool = tstee_create_shm_pool();
+	if (IS_ERR(tstee->pool)) {
+		rc = PTR_ERR(tstee->pool);
+		tstee->pool = NULL;
+		goto err_free_tstee;
+	}
+
+	tstee->teedev = tee_device_alloc(&tstee_desc, NULL, tstee->pool, tstee);
+	if (IS_ERR(tstee->teedev)) {
+		rc = PTR_ERR(tstee->teedev);
+		tstee->teedev = NULL;
+		goto err_free_pool;
+	}
+
+	rc = tee_device_register(tstee->teedev);
+	if (rc)
+		goto err_unreg_teedev;
+
+	ffa_dev_set_drvdata(ffa_dev, tstee);
+
+	return 0;
+
+err_unreg_teedev:
+	tee_device_unregister(tstee->teedev);
+err_free_pool:
+	tee_shm_pool_free(tstee->pool);
+err_free_tstee:
+	kfree(tstee);
+	return rc;
+}
+
+static void tstee_remove(struct ffa_device *ffa_dev)
+{
+	struct tstee *tstee = ffa_dev->dev.driver_data;
+
+	tee_device_unregister(tstee->teedev);
+	tee_shm_pool_free(tstee->pool);
+	kfree(tstee);
+}
+
+static const struct ffa_device_id tstee_device_ids[] = {
+	/* TS RPC protocol UUID: bdcd76d7-825e-4751-963b-86d4f84943ac */
+	{ TS_RPC_UUID },
+	{}
+};
+
+static struct ffa_driver tstee_driver = {
+	.name = "arm_tstee",
+	.probe = tstee_probe,
+	.remove = tstee_remove,
+	.id_table = tstee_device_ids,
+};
+
+module_ffa_driver(tstee_driver);
+
+MODULE_AUTHOR("Balint Dobszay <balint.dobszay@arm.com>");
+MODULE_DESCRIPTION("Arm Trusted Services TEE driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/tee/tstee/tstee_private.h b/drivers/tee/tstee/tstee_private.h
new file mode 100644
index 0000000000..8e58725b57
--- /dev/null
+++ b/drivers/tee/tstee/tstee_private.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2023, Arm Limited
+ */
+
+#ifndef TSTEE_PRIVATE_H
+#define TSTEE_PRIVATE_H
+
+#include <linux/arm_ffa.h>
+#include <linux/bitops.h>
+#include <linux/tee_core.h>
+#include <linux/types.h>
+#include <linux/uuid.h>
+#include <linux/xarray.h>
+
+/*
+ * The description of the ABI implemented in this file is available at
+ * https://trusted-services.readthedocs.io/en/v1.0.0/developer/service-access-protocols.html#abi
+ */
+
+/* UUID of this protocol */
+#define TS_RPC_UUID UUID_INIT(0xbdcd76d7, 0x825e, 0x4751, \
+			      0x96, 0x3b, 0x86, 0xd4, 0xf8, 0x49, 0x43, 0xac)
+
+/* Protocol version*/
+#define TS_RPC_PROTOCOL_VERSION		(1)
+
+/* Status codes */
+#define TS_RPC_OK			(0)
+
+/* RPC control register */
+#define TS_RPC_CTRL_REG			(0)
+#define OPCODE_MASK			GENMASK(15, 0)
+#define IFACE_ID_MASK			GENMASK(23, 16)
+#define TS_RPC_CTRL_OPCODE(x)		((u16)(FIELD_GET(OPCODE_MASK, (x))))
+#define TS_RPC_CTRL_IFACE_ID(x)		((u8)(FIELD_GET(IFACE_ID_MASK, (x))))
+#define TS_RPC_CTRL_PACK_IFACE_OPCODE(i, o)	\
+	(FIELD_PREP(IFACE_ID_MASK, (i)) | FIELD_PREP(OPCODE_MASK, (o)))
+#define TS_RPC_CTRL_SAP_RC		BIT(30)
+#define TS_RPC_CTRL_SAP_ERR		BIT(31)
+
+/* Interface ID for RPC management operations */
+#define TS_RPC_MGMT_IFACE_ID		(0xff)
+
+/* Management calls */
+#define TS_RPC_OP_GET_VERSION		(0x0000)
+#define TS_RPC_GET_VERSION_RESP		(1)
+
+#define TS_RPC_OP_RETRIEVE_MEM		(0x0001)
+#define TS_RPC_RETRIEVE_MEM_HANDLE_LSW	(1)
+#define TS_RPC_RETRIEVE_MEM_HANDLE_MSW	(2)
+#define TS_RPC_RETRIEVE_MEM_TAG_LSW	(3)
+#define TS_RPC_RETRIEVE_MEM_TAG_MSW	(4)
+#define TS_RPC_RETRIEVE_MEM_RPC_STATUS	(1)
+
+#define TS_RPC_OP_RELINQ_MEM		(0x0002)
+#define TS_RPC_RELINQ_MEM_HANDLE_LSW	(1)
+#define TS_RPC_RELINQ_MEM_HANDLE_MSW	(2)
+#define TS_RPC_RELINQ_MEM_RPC_STATUS	(1)
+
+#define TS_RPC_OP_SERVICE_INFO		(0x0003)
+#define TS_RPC_SERVICE_INFO_UUID0	(1)
+#define TS_RPC_SERVICE_INFO_UUID1	(2)
+#define TS_RPC_SERVICE_INFO_UUID2	(3)
+#define TS_RPC_SERVICE_INFO_UUID3	(4)
+#define TS_RPC_SERVICE_INFO_RPC_STATUS	(1)
+#define TS_RPC_SERVICE_INFO_IFACE	(2)
+
+/* Service call */
+#define TS_RPC_SERVICE_MEM_HANDLE_LSW	(1)
+#define TS_RPC_SERVICE_MEM_HANDLE_MSW	(2)
+#define TS_RPC_SERVICE_REQ_LEN		(3)
+#define TS_RPC_SERVICE_CLIENT_ID	(4)
+#define TS_RPC_SERVICE_RPC_STATUS	(1)
+#define TS_RPC_SERVICE_STATUS		(2)
+#define TS_RPC_SERVICE_RESP_LEN		(3)
+
+struct tstee {
+	struct ffa_device *ffa_dev;
+	struct tee_device *teedev;
+	struct tee_shm_pool *pool;
+};
+
+struct ts_session {
+	u8 iface_id;
+};
+
+struct ts_context_data {
+	struct xarray sess_list;
+};
+
+#endif /* TSTEE_PRIVATE_H */