1 // SPDX-License-Identifier: MIT
3 * Copyright 2019 Advanced Micro Devices, Inc.
6 #include <linux/device.h>
8 #include <linux/tee_drv.h>
9 #include <linux/psp-tee.h>
10 #include <linux/slab.h>
11 #include <linux/psp-sev.h>
12 #include "amdtee_if.h"
13 #include "amdtee_private.h"
15 static int tee_params_to_amd_params(struct tee_param *tee, u32 count,
16 struct tee_operation *amd)
24 if (!tee || !amd || count > TEE_MAX_PARAMS)
28 for (i = 0; i < count; i++) {
29 /* AMD TEE does not support meta parameter */
30 if (tee[i].attr > TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT)
33 amd->param_types |= ((tee[i].attr & 0xF) << i * 4);
36 for (i = 0; i < count; i++) {
37 type = TEE_PARAM_TYPE_GET(amd->param_types, i);
38 pr_debug("%s: type[%d] = 0x%x\n", __func__, i, type);
40 if (type == TEE_OP_PARAM_TYPE_INVALID)
43 if (type == TEE_OP_PARAM_TYPE_NONE)
46 /* It is assumed that all values are within 2^32-1 */
47 if (type > TEE_OP_PARAM_TYPE_VALUE_INOUT) {
48 u32 buf_id = get_buffer_id(tee[i].u.memref.shm);
50 amd->params[i].mref.buf_id = buf_id;
51 amd->params[i].mref.offset = tee[i].u.memref.shm_offs;
52 amd->params[i].mref.size = tee[i].u.memref.size;
53 pr_debug("%s: bufid[%d] = 0x%x, offset[%d] = 0x%x, size[%d] = 0x%x\n",
55 i, amd->params[i].mref.buf_id,
56 i, amd->params[i].mref.offset,
57 i, amd->params[i].mref.size);
60 pr_warn("%s: Discarding value c", __func__);
62 amd->params[i].val.a = tee[i].u.value.a;
63 amd->params[i].val.b = tee[i].u.value.b;
64 pr_debug("%s: a[%d] = 0x%x, b[%d] = 0x%x\n", __func__,
65 i, amd->params[i].val.a,
66 i, amd->params[i].val.b);
72 static int amd_params_to_tee_params(struct tee_param *tee, u32 count,
73 struct tee_operation *amd)
81 if (!tee || !amd || count > TEE_MAX_PARAMS)
84 /* Assumes amd->param_types is valid */
85 for (i = 0; i < count; i++) {
86 type = TEE_PARAM_TYPE_GET(amd->param_types, i);
87 pr_debug("%s: type[%d] = 0x%x\n", __func__, i, type);
89 if (type == TEE_OP_PARAM_TYPE_INVALID ||
90 type > TEE_OP_PARAM_TYPE_MEMREF_INOUT)
93 if (type == TEE_OP_PARAM_TYPE_NONE ||
94 type == TEE_OP_PARAM_TYPE_VALUE_INPUT ||
95 type == TEE_OP_PARAM_TYPE_MEMREF_INPUT)
99 * It is assumed that buf_id remains unchanged for
100 * both open_session and invoke_cmd call
102 if (type > TEE_OP_PARAM_TYPE_MEMREF_INPUT) {
103 tee[i].u.memref.shm_offs = amd->params[i].mref.offset;
104 tee[i].u.memref.size = amd->params[i].mref.size;
105 pr_debug("%s: bufid[%d] = 0x%x, offset[%d] = 0x%x, size[%d] = 0x%x\n",
107 i, amd->params[i].mref.buf_id,
108 i, amd->params[i].mref.offset,
109 i, amd->params[i].mref.size);
111 /* field 'c' not supported by AMD TEE */
112 tee[i].u.value.a = amd->params[i].val.a;
113 tee[i].u.value.b = amd->params[i].val.b;
114 tee[i].u.value.c = 0;
115 pr_debug("%s: a[%d] = 0x%x, b[%d] = 0x%x\n",
117 i, amd->params[i].val.a,
118 i, amd->params[i].val.b);
124 static DEFINE_MUTEX(ta_refcount_mutex);
125 static struct list_head ta_list = LIST_HEAD_INIT(ta_list);
127 static u32 get_ta_refcount(u32 ta_handle)
129 struct amdtee_ta_data *ta_data;
132 /* Caller must hold a mutex */
133 list_for_each_entry(ta_data, &ta_list, list_node)
134 if (ta_data->ta_handle == ta_handle)
135 return ++ta_data->refcount;
137 ta_data = kzalloc(sizeof(*ta_data), GFP_KERNEL);
139 ta_data->ta_handle = ta_handle;
140 ta_data->refcount = 1;
141 count = ta_data->refcount;
142 list_add(&ta_data->list_node, &ta_list);
148 static u32 put_ta_refcount(u32 ta_handle)
150 struct amdtee_ta_data *ta_data;
153 /* Caller must hold a mutex */
154 list_for_each_entry(ta_data, &ta_list, list_node)
155 if (ta_data->ta_handle == ta_handle) {
156 count = --ta_data->refcount;
158 list_del(&ta_data->list_node);
167 int handle_unload_ta(u32 ta_handle)
169 struct tee_cmd_unload_ta cmd = {0};
176 mutex_lock(&ta_refcount_mutex);
178 count = put_ta_refcount(ta_handle);
181 pr_debug("unload ta: not unloading %u count %u\n",
187 cmd.ta_handle = ta_handle;
189 ret = psp_tee_process_cmd(TEE_CMD_ID_UNLOAD_TA, (void *)&cmd,
190 sizeof(cmd), &status);
191 if (!ret && status != 0) {
192 pr_err("unload ta: status = 0x%x\n", status);
195 pr_debug("unloaded ta handle %u\n", ta_handle);
199 mutex_unlock(&ta_refcount_mutex);
203 int handle_close_session(u32 ta_handle, u32 info)
205 struct tee_cmd_close_session cmd = {0};
212 cmd.ta_handle = ta_handle;
213 cmd.session_info = info;
215 ret = psp_tee_process_cmd(TEE_CMD_ID_CLOSE_SESSION, (void *)&cmd,
216 sizeof(cmd), &status);
217 if (!ret && status != 0) {
218 pr_err("close session: status = 0x%x\n", status);
225 void handle_unmap_shmem(u32 buf_id)
227 struct tee_cmd_unmap_shared_mem cmd = {0};
233 ret = psp_tee_process_cmd(TEE_CMD_ID_UNMAP_SHARED_MEM, (void *)&cmd,
234 sizeof(cmd), &status);
236 pr_debug("unmap shared memory: buf_id %u status = 0x%x\n",
240 int handle_invoke_cmd(struct tee_ioctl_invoke_arg *arg, u32 sinfo,
243 struct tee_cmd_invoke_cmd cmd = {0};
246 if (!arg || (!p && arg->num_params))
249 arg->ret_origin = TEEC_ORIGIN_COMMS;
251 if (arg->session == 0) {
252 arg->ret = TEEC_ERROR_BAD_PARAMETERS;
256 ret = tee_params_to_amd_params(p, arg->num_params, &cmd.op);
258 pr_err("invalid Params. Abort invoke command\n");
259 arg->ret = TEEC_ERROR_BAD_PARAMETERS;
263 cmd.ta_handle = get_ta_handle(arg->session);
264 cmd.cmd_id = arg->func;
265 cmd.session_info = sinfo;
267 ret = psp_tee_process_cmd(TEE_CMD_ID_INVOKE_CMD, (void *)&cmd,
268 sizeof(cmd), &arg->ret);
270 arg->ret = TEEC_ERROR_COMMUNICATION;
272 ret = amd_params_to_tee_params(p, arg->num_params, &cmd.op);
274 pr_err("invoke command: failed to copy output\n");
275 arg->ret = TEEC_ERROR_GENERIC;
278 arg->ret_origin = cmd.return_origin;
279 pr_debug("invoke command: RO = 0x%x ret = 0x%x\n",
280 arg->ret_origin, arg->ret);
286 int handle_map_shmem(u32 count, struct shmem_desc *start, u32 *buf_id)
288 struct tee_cmd_map_shared_mem *cmd;
293 if (!count || !start || !buf_id)
296 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
300 /* Size must be page aligned */
301 for (i = 0; i < count ; i++) {
302 if (!start[i].kaddr || (start[i].size & (PAGE_SIZE - 1))) {
307 if ((u64)start[i].kaddr & (PAGE_SIZE - 1)) {
308 pr_err("map shared memory: page unaligned. addr 0x%llx",
309 (u64)start[i].kaddr);
315 cmd->sg_list.count = count;
317 /* Create buffer list */
318 for (i = 0; i < count ; i++) {
319 paddr = __psp_pa(start[i].kaddr);
320 cmd->sg_list.buf[i].hi_addr = upper_32_bits(paddr);
321 cmd->sg_list.buf[i].low_addr = lower_32_bits(paddr);
322 cmd->sg_list.buf[i].size = start[i].size;
323 cmd->sg_list.size += cmd->sg_list.buf[i].size;
325 pr_debug("buf[%d]:hi addr = 0x%x\n", i,
326 cmd->sg_list.buf[i].hi_addr);
327 pr_debug("buf[%d]:low addr = 0x%x\n", i,
328 cmd->sg_list.buf[i].low_addr);
329 pr_debug("buf[%d]:size = 0x%x\n", i, cmd->sg_list.buf[i].size);
330 pr_debug("list size = 0x%x\n", cmd->sg_list.size);
335 ret = psp_tee_process_cmd(TEE_CMD_ID_MAP_SHARED_MEM, (void *)cmd,
336 sizeof(*cmd), &status);
337 if (!ret && !status) {
338 *buf_id = cmd->buf_id;
339 pr_debug("mapped buffer ID = 0x%x\n", *buf_id);
341 pr_err("map shared memory: status = 0x%x\n", status);
351 int handle_open_session(struct tee_ioctl_open_session_arg *arg, u32 *info,
354 struct tee_cmd_open_session cmd = {0};
357 if (!arg || !info || (!p && arg->num_params))
360 arg->ret_origin = TEEC_ORIGIN_COMMS;
362 if (arg->session == 0) {
363 arg->ret = TEEC_ERROR_GENERIC;
367 ret = tee_params_to_amd_params(p, arg->num_params, &cmd.op);
369 pr_err("invalid Params. Abort open session\n");
370 arg->ret = TEEC_ERROR_BAD_PARAMETERS;
374 cmd.ta_handle = get_ta_handle(arg->session);
377 ret = psp_tee_process_cmd(TEE_CMD_ID_OPEN_SESSION, (void *)&cmd,
378 sizeof(cmd), &arg->ret);
380 arg->ret = TEEC_ERROR_COMMUNICATION;
382 ret = amd_params_to_tee_params(p, arg->num_params, &cmd.op);
384 pr_err("open session: failed to copy output\n");
385 arg->ret = TEEC_ERROR_GENERIC;
388 arg->ret_origin = cmd.return_origin;
389 *info = cmd.session_info;
390 pr_debug("open session: session info = 0x%x\n", *info);
393 pr_debug("open session: ret = 0x%x RO = 0x%x\n", arg->ret,
399 int handle_load_ta(void *data, u32 size, struct tee_ioctl_open_session_arg *arg)
401 struct tee_cmd_unload_ta unload_cmd = {};
402 struct tee_cmd_load_ta load_cmd = {};
406 if (size == 0 || !data || !arg)
409 blob = __psp_pa(data);
410 if (blob & (PAGE_SIZE - 1)) {
411 pr_err("load TA: page unaligned. blob 0x%llx", blob);
415 load_cmd.hi_addr = upper_32_bits(blob);
416 load_cmd.low_addr = lower_32_bits(blob);
417 load_cmd.size = size;
419 mutex_lock(&ta_refcount_mutex);
421 ret = psp_tee_process_cmd(TEE_CMD_ID_LOAD_TA, (void *)&load_cmd,
422 sizeof(load_cmd), &arg->ret);
424 arg->ret_origin = TEEC_ORIGIN_COMMS;
425 arg->ret = TEEC_ERROR_COMMUNICATION;
426 } else if (arg->ret == TEEC_SUCCESS) {
427 ret = get_ta_refcount(load_cmd.ta_handle);
429 arg->ret_origin = TEEC_ORIGIN_COMMS;
430 arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
432 /* Unload the TA on error */
433 unload_cmd.ta_handle = load_cmd.ta_handle;
434 psp_tee_process_cmd(TEE_CMD_ID_UNLOAD_TA,
436 sizeof(unload_cmd), &ret);
438 set_session_id(load_cmd.ta_handle, 0, &arg->session);
441 mutex_unlock(&ta_refcount_mutex);
443 pr_debug("load TA: TA handle = 0x%x, RO = 0x%x, ret = 0x%x\n",
444 load_cmd.ta_handle, arg->ret_origin, arg->ret);