1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2008-2015 Freescale Semiconductor, Inc.
5 * Command for encapsulating DEK blob
12 #include <asm/byteorder.h>
13 #include <linux/compiler.h>
15 #include <asm/arch/clock.h>
20 * blob_dek() - Encapsulate the DEK as a blob using CAM's Key
21 * @src: - Address of data to be encapsulated
22 * @dst: - Desination address of encapsulated data
23 * @len: - Size of data to be encapsulated
25 * Returns zero on success,and negative on error.
27 #ifdef CONFIG_IMX_CAAM_DEK_ENCAP
28 static int blob_encap_dek(u32 src_addr, u32 dst_addr, u32 len)
30 u8 *src_ptr, *dst_ptr;
32 src_ptr = map_sysmem(src_addr, len / 8);
33 dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len / 8));
35 hab_caam_clock_enable(1);
37 u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR +
38 FSL_CAAM_ORSR_JRa_OFFSET);
39 if (out_jr_size != FSL_CAAM_MAX_JR_SIZE)
42 if (!((len == 128) | (len == 192) | (len == 256))) {
43 debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
48 return blob_dek(src_ptr, dst_ptr, len);
50 #endif /* CONFIG_IMX_CAAM_DEK_ENCAP */
52 #ifdef CONFIG_IMX_OPTEE_DEK_ENCAP
54 #define PTA_DEK_BLOB_PTA_UUID {0xef477737, 0x0db1, 0x4a9d, \
55 {0x84, 0x37, 0xf2, 0xf5, 0x35, 0xc0, 0xbd, 0x92} }
57 #define OPTEE_BLOB_HDR_SIZE 8
59 static int blob_encap_dek(u32 src_addr, u32 dst_addr, u32 len)
61 struct udevice *dev = NULL;
62 struct tee_shm *shm_input, *shm_output;
63 struct tee_open_session_arg arg = {0};
64 struct tee_invoke_arg arg_func = {0};
65 const struct tee_optee_ta_uuid uuid = PTA_DEK_BLOB_PTA_UUID;
66 struct tee_param param[4] = {0};
70 dev = tee_find_device(NULL, NULL, NULL, NULL);
72 printf("Cannot get OP-TEE device\n");
77 tee_optee_ta_uuid_to_octets(arg.uuid, &uuid);
80 ret = tee_open_session(dev, &arg, 0, NULL);
82 printf("Cannot open session with PTA Blob 0x%X\n", ret);
86 /* Allocate shared input and output buffers for TA */
87 ret = tee_shm_register(dev, (void *)(ulong)src_addr, len / 8, 0x0, &shm_input);
89 printf("Cannot register input shared memory 0x%X\n", ret);
93 ret = tee_shm_register(dev, (void *)(ulong)dst_addr,
94 BLOB_SIZE(len / 8) + OPTEE_BLOB_HDR_SIZE,
97 printf("Cannot register output shared memory 0x%X\n", ret);
101 param[0].u.memref.shm = shm_input;
102 param[0].u.memref.size = shm_input->size;
103 param[0].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
104 param[1].u.memref.shm = shm_output;
105 param[1].u.memref.size = shm_output->size;
106 param[1].attr = TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT;
107 param[2].attr = TEE_PARAM_ATTR_TYPE_NONE;
108 param[3].attr = TEE_PARAM_ATTR_TYPE_NONE;
111 arg_func.session = arg.session;
113 /* Generate DEK blob */
114 arg_func.session = arg.session;
115 ret = tee_invoke_func(dev, &arg_func, 4, param);
117 printf("Cannot generate Blob with PTA DEK Blob 0x%X\n", ret);
120 /* Free shared memory */
121 tee_shm_free(shm_input);
122 tee_shm_free(shm_output);
125 ret = tee_close_session(dev, arg.session);
127 printf("Cannot close session with PTA DEK Blob 0x%X\n", ret);
131 #endif /* CONFIG_IMX_OPTEE_DEK_ENCAP */
134 * do_dek_blob() - Handle the "dek_blob" command-line command
135 * @cmdtp: Command data struct pointer
136 * @flag: Command flag
137 * @argc: Command-line argument count
138 * @argv: Array of command-line arguments
140 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
143 static int do_dek_blob(struct cmd_tbl *cmdtp, int flag, int argc,
146 uint32_t src_addr, dst_addr, len;
149 return CMD_RET_USAGE;
151 src_addr = simple_strtoul(argv[1], NULL, 16);
152 dst_addr = simple_strtoul(argv[2], NULL, 16);
153 len = simple_strtoul(argv[3], NULL, 10);
155 return blob_encap_dek(src_addr, dst_addr, len);
158 /***************************************************/
159 static char dek_blob_help_text[] =
160 "src dst len - Encapsulate and create blob of data\n"
161 " $len bits long at address $src and\n"
162 " store the result at address $dst.\n";
165 dek_blob, 4, 1, do_dek_blob,
166 "Data Encryption Key blob encapsulation",