Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1 | From 5665ffd3fb8e94003abc1c0c05c9fa30d4028b67 Mon Sep 17 00:00:00 2001 |
| 2 | From: Jens Wiklander <jens.wiklander@linaro.org> |
| 3 | Date: Thu, 25 Mar 2021 15:08:53 +0100 |
| 4 | Subject: [PATCH 19/22] optee: add FF-A support |
| 5 | |
| 6 | Adds support for using FF-A [1] as transport to the OP-TEE driver. |
| 7 | |
| 8 | Introduces struct optee_msg_param_fmem which carries all information |
| 9 | needed when OP-TEE is calling FFA_MEM_RETRIEVE_REQ to get the shared |
| 10 | memory reference mapped by the hypervisor in S-EL2. Register usage is |
| 11 | also updated to include the information needed. |
| 12 | |
| 13 | The FF-A part of this driver is enabled if CONFIG_ARM_FFA_TRANSPORT is |
| 14 | enabled. |
| 15 | |
| 16 | [1] https://developer.arm.com/documentation/den0077/latest |
| 17 | Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> |
| 18 | |
| 19 | Upstream-Status: Pending [Not submitted to upstream yet] |
| 20 | --- |
| 21 | drivers/tee/optee/call.c | 212 ++++++++++++- |
| 22 | drivers/tee/optee/core.c | 486 +++++++++++++++++++++++++++++- |
| 23 | drivers/tee/optee/optee_ffa.h | 153 ++++++++++ |
| 24 | drivers/tee/optee/optee_msg.h | 27 +- |
| 25 | drivers/tee/optee/optee_private.h | 52 ++++ |
| 26 | drivers/tee/optee/rpc.c | 118 ++++++++ |
| 27 | 6 files changed, 1040 insertions(+), 8 deletions(-) |
| 28 | create mode 100644 drivers/tee/optee/optee_ffa.h |
| 29 | |
| 30 | diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c |
| 31 | index e7b93153252c..cf91a81a242a 100644 |
| 32 | --- a/drivers/tee/optee/call.c |
| 33 | +++ b/drivers/tee/optee/call.c |
| 34 | @@ -3,15 +3,18 @@ |
| 35 | * Copyright (c) 2015-2021, Linaro Limited |
| 36 | */ |
| 37 | #include <linux/arm-smccc.h> |
| 38 | +#include <linux/arm_ffa.h> |
| 39 | #include <linux/device.h> |
| 40 | #include <linux/err.h> |
| 41 | #include <linux/errno.h> |
| 42 | #include <linux/mm.h> |
| 43 | #include <linux/sched.h> |
| 44 | +#include <linux/scatterlist.h> |
| 45 | #include <linux/slab.h> |
| 46 | #include <linux/tee_drv.h> |
| 47 | #include <linux/types.h> |
| 48 | #include <linux/uaccess.h> |
| 49 | +#include "optee_ffa.h" |
| 50 | #include "optee_private.h" |
| 51 | #include "optee_smc.h" |
| 52 | |
| 53 | @@ -180,11 +183,21 @@ int optee_do_call_with_arg(struct tee_context *ctx, struct tee_shm *arg) |
| 54 | static struct tee_shm *get_msg_arg(struct tee_context *ctx, size_t num_params, |
| 55 | struct optee_msg_arg **msg_arg) |
| 56 | { |
| 57 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 58 | + size_t sz = OPTEE_MSG_GET_ARG_SIZE(num_params); |
| 59 | struct tee_shm *shm; |
| 60 | struct optee_msg_arg *ma; |
| 61 | |
| 62 | - shm = tee_shm_alloc(ctx, OPTEE_MSG_GET_ARG_SIZE(num_params), |
| 63 | - TEE_SHM_MAPPED); |
| 64 | + /* |
| 65 | + * rpc_arg_count is set to the number of allocated parameters in |
| 66 | + * the RPC argument struct if a second MSG arg struct is expected. |
| 67 | + * The second arg struct will then be used for RPC. So far only |
| 68 | + * enabled when using FF-A as transport layer. |
| 69 | + */ |
| 70 | + if (optee->rpc_arg_count) |
| 71 | + sz += OPTEE_MSG_GET_ARG_SIZE(optee->rpc_arg_count); |
| 72 | + |
| 73 | + shm = tee_shm_alloc(ctx, sz, TEE_SHM_MAPPED); |
| 74 | if (IS_ERR(shm)) |
| 75 | return shm; |
| 76 | |
| 77 | @@ -673,3 +686,198 @@ int optee_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm) |
| 78 | { |
| 79 | return 0; |
| 80 | } |
| 81 | + |
| 82 | +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| 83 | +static int optee_ffa_yielding_call(struct tee_context *ctx, |
| 84 | + struct ffa_send_direct_data *data, |
| 85 | + struct optee_msg_arg *rpc_arg) |
| 86 | +{ |
| 87 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 88 | + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| 89 | + struct ffa_device *ffa_dev = optee->ffa.ffa_dev; |
| 90 | + struct optee_call_waiter w; |
| 91 | + u32 cmd = data->data0; |
| 92 | + u32 w4 = data->data1; |
| 93 | + u32 w5 = data->data2; |
| 94 | + u32 w6 = data->data3; |
| 95 | + int rc; |
| 96 | + |
| 97 | + /* Initialize waiter */ |
| 98 | + optee_cq_wait_init(&optee->call_queue, &w); |
| 99 | + while (true) { |
| 100 | + rc = ffa_ops->sync_send_receive(ffa_dev, data); |
| 101 | + if (rc) |
| 102 | + goto done; |
| 103 | + |
| 104 | + switch ((int)data->data0) { |
| 105 | + case TEEC_SUCCESS: |
| 106 | + break; |
| 107 | + case TEEC_ERROR_BUSY: |
| 108 | + if (cmd == OPTEE_FFA_YIELDING_CALL_RESUME) { |
| 109 | + rc = -EIO; |
| 110 | + goto done; |
| 111 | + } |
| 112 | + |
| 113 | + /* |
| 114 | + * Out of threads in secure world, wait for a thread |
| 115 | + * become available. |
| 116 | + */ |
| 117 | + optee_cq_wait_for_completion(&optee->call_queue, &w); |
| 118 | + data->data0 = cmd; |
| 119 | + data->data1 = w4; |
| 120 | + data->data2 = w5; |
| 121 | + data->data3 = w6; |
| 122 | + continue; |
| 123 | + default: |
| 124 | + rc = -EIO; |
| 125 | + goto done; |
| 126 | + } |
| 127 | + |
| 128 | + if (data->data1 == OPTEE_FFA_YIELDING_CALL_RETURN_DONE) |
| 129 | + goto done; |
| 130 | + |
| 131 | + /* |
| 132 | + * OP-TEE has returned with a RPC request. |
| 133 | + * |
| 134 | + * Note that data->data4 (passed in register w7) is already |
| 135 | + * filled in by ffa_ops->sync_send_receive() returning |
| 136 | + * above. |
| 137 | + */ |
| 138 | + cond_resched(); |
| 139 | + optee_handle_ffa_rpc(ctx, data->data1, rpc_arg); |
| 140 | + cmd = OPTEE_FFA_YIELDING_CALL_RESUME; |
| 141 | + data->data0 = cmd; |
| 142 | + data->data1 = 0; |
| 143 | + data->data2 = 0; |
| 144 | + data->data3 = 0; |
| 145 | + } |
| 146 | +done: |
| 147 | + /* |
| 148 | + * We're done with our thread in secure world, if there's any |
| 149 | + * thread waiters wake up one. |
| 150 | + */ |
| 151 | + optee_cq_wait_final(&optee->call_queue, &w); |
| 152 | + |
| 153 | + return rc; |
| 154 | +} |
| 155 | + |
| 156 | +/** |
| 157 | + * optee_ffa_do_call_with_arg() - Do a FF-A call to enter OP-TEE in secure world |
| 158 | + * @ctx: calling context |
| 159 | + * @shm: shared memory holding the message to pass to secure world |
| 160 | + * |
| 161 | + * Does a FF-A call to OP-TEE in secure world and handles eventual resulting |
| 162 | + * Remote Procedure Calls (RPC) from OP-TEE. |
| 163 | + * |
| 164 | + * Returns return code from FF-A, 0 is OK |
| 165 | + */ |
| 166 | + |
| 167 | +int optee_ffa_do_call_with_arg(struct tee_context *ctx, struct tee_shm *shm) |
| 168 | +{ |
| 169 | + struct ffa_send_direct_data data = { |
| 170 | + .data0 = OPTEE_FFA_YIELDING_CALL_WITH_ARG, |
| 171 | + .data1 = (u32)shm->sec_world_id, |
| 172 | + .data2 = (u32)(shm->sec_world_id >> 32), |
| 173 | + .data3 = shm->offset, |
| 174 | + }; |
| 175 | + struct optee_msg_arg *arg = tee_shm_get_va(shm, 0); |
| 176 | + unsigned int rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params); |
| 177 | + struct optee_msg_arg *rpc_arg = tee_shm_get_va(shm, rpc_arg_offs); |
| 178 | + |
| 179 | + return optee_ffa_yielding_call(ctx, &data, rpc_arg); |
| 180 | +} |
| 181 | + |
| 182 | +int optee_ffa_shm_register(struct tee_context *ctx, struct tee_shm *shm, |
| 183 | + struct page **pages, size_t num_pages, |
| 184 | + unsigned long start) |
| 185 | +{ |
| 186 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 187 | + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| 188 | + struct ffa_device *ffa_dev = optee->ffa.ffa_dev; |
| 189 | + struct ffa_mem_region_attributes mem_attr = { |
| 190 | + .receiver = ffa_dev->vm_id, |
| 191 | + .attrs = FFA_MEM_RW, |
| 192 | + }; |
| 193 | + struct ffa_mem_ops_args args = { |
| 194 | + .use_txbuf = true, |
| 195 | + .attrs = &mem_attr, |
| 196 | + .nattrs = 1, |
| 197 | + }; |
| 198 | + struct sg_table sgt; |
| 199 | + int rc; |
| 200 | + |
| 201 | + rc = check_mem_type(start, num_pages); |
| 202 | + if (rc) |
| 203 | + return rc; |
| 204 | + |
| 205 | + rc = sg_alloc_table_from_pages(&sgt, pages, num_pages, 0, |
| 206 | + num_pages * PAGE_SIZE, GFP_KERNEL); |
| 207 | + if (rc) |
| 208 | + return rc; |
| 209 | + args.sg = sgt.sgl; |
| 210 | + rc = ffa_ops->memory_share(ffa_dev, &args); |
| 211 | + sg_free_table(&sgt); |
| 212 | + if (rc) |
| 213 | + return rc; |
| 214 | + |
| 215 | + rc = optee_shm_add_ffa_handle(optee, shm, args.g_handle); |
| 216 | + if (rc) { |
| 217 | + ffa_ops->memory_reclaim(args.g_handle, 0); |
| 218 | + return rc; |
| 219 | + } |
| 220 | + |
| 221 | + shm->sec_world_id = args.g_handle; |
| 222 | + |
| 223 | + return 0; |
| 224 | +} |
| 225 | + |
| 226 | +int optee_ffa_shm_unregister(struct tee_context *ctx, struct tee_shm *shm) |
| 227 | +{ |
| 228 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 229 | + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| 230 | + struct ffa_device *ffa_dev = optee->ffa.ffa_dev; |
| 231 | + u64 global_handle = shm->sec_world_id; |
| 232 | + struct ffa_send_direct_data data = { |
| 233 | + .data0 = OPTEE_FFA_UNREGISTER_SHM, |
| 234 | + .data1 = (u32)global_handle, |
| 235 | + .data2 = (u32)(global_handle >> 32) |
| 236 | + }; |
| 237 | + int rc; |
| 238 | + |
| 239 | + optee_shm_rem_ffa_handle(optee, global_handle); |
| 240 | + shm->sec_world_id = 0; |
| 241 | + |
| 242 | + rc = ffa_ops->sync_send_receive(ffa_dev, &data); |
| 243 | + if (rc) |
| 244 | + pr_err("Unregister SHM id 0x%llx rc %d\n", global_handle, rc); |
| 245 | + |
| 246 | + rc = ffa_ops->memory_reclaim(global_handle, 0); |
| 247 | + if (rc) |
| 248 | + pr_err("mem_reclain: 0x%llx %d", global_handle, rc); |
| 249 | + |
| 250 | + return rc; |
| 251 | +} |
| 252 | + |
| 253 | +int optee_ffa_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm) |
| 254 | +{ |
| 255 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 256 | + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| 257 | + u64 global_handle = shm->sec_world_id; |
| 258 | + int rc; |
| 259 | + |
| 260 | + /* |
| 261 | + * We're skipping the OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM call |
| 262 | + * since this is OP-TEE freeing via RPC so it has already retired |
| 263 | + * this ID. |
| 264 | + */ |
| 265 | + |
| 266 | + optee_shm_rem_ffa_handle(optee, global_handle); |
| 267 | + rc = ffa_ops->memory_reclaim(global_handle, 0); |
| 268 | + if (rc) |
| 269 | + pr_err("mem_reclain: 0x%llx %d", global_handle, rc); |
| 270 | + |
| 271 | + shm->sec_world_id = 0; |
| 272 | + |
| 273 | + return rc; |
| 274 | +} |
| 275 | +#endif /*CONFIG_ARM_FFA_TRANSPORT*/ |
| 276 | diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c |
| 277 | index ab602bb8e14a..b9719c60dc48 100644 |
| 278 | --- a/drivers/tee/optee/core.c |
| 279 | +++ b/drivers/tee/optee/core.c |
| 280 | @@ -6,6 +6,7 @@ |
| 281 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 282 | |
| 283 | #include <linux/arm-smccc.h> |
| 284 | +#include <linux/arm_ffa.h> |
| 285 | #include <linux/errno.h> |
| 286 | #include <linux/io.h> |
| 287 | #include <linux/module.h> |
| 288 | @@ -20,6 +21,7 @@ |
| 289 | #include <linux/workqueue.h> |
| 290 | #include "optee_private.h" |
| 291 | #include "optee_smc.h" |
| 292 | +#include "optee_ffa.h" |
| 293 | #include "shm_pool.h" |
| 294 | |
| 295 | #define DRIVER_NAME "optee" |
| 296 | @@ -299,10 +301,9 @@ static int optee_open(struct tee_context *ctx) |
| 297 | mutex_init(&ctxdata->mutex); |
| 298 | INIT_LIST_HEAD(&ctxdata->sess_list); |
| 299 | |
| 300 | - if (optee->sec_caps & OPTEE_SMC_SEC_CAP_MEMREF_NULL) |
| 301 | - ctx->cap_memref_null = true; |
| 302 | - else |
| 303 | - ctx->cap_memref_null = false; |
| 304 | + ctx->cap_memref_null = optee_is_ffa_based(optee) || |
| 305 | + (optee->sec_caps & |
| 306 | + OPTEE_SMC_SEC_CAP_MEMREF_NULL); |
| 307 | |
| 308 | ctx->data = ctxdata; |
| 309 | return 0; |
| 310 | @@ -567,6 +568,472 @@ optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm) |
| 311 | return rc; |
| 312 | } |
| 313 | |
| 314 | +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| 315 | +static void optee_ffa_get_version(struct tee_device *teedev, |
| 316 | + struct tee_ioctl_version_data *vers) |
| 317 | +{ |
| 318 | + struct tee_ioctl_version_data v = { |
| 319 | + .impl_id = TEE_IMPL_ID_OPTEE, |
| 320 | + .impl_caps = TEE_OPTEE_CAP_TZ, |
| 321 | + .gen_caps = TEE_GEN_CAP_GP | TEE_GEN_CAP_REG_MEM | |
| 322 | + TEE_GEN_CAP_MEMREF_NULL, |
| 323 | + }; |
| 324 | + |
| 325 | + *vers = v; |
| 326 | +} |
| 327 | + |
| 328 | +struct shm_rhash { |
| 329 | + struct tee_shm *shm; |
| 330 | + u64 global_id; |
| 331 | + struct rhash_head linkage; |
| 332 | +}; |
| 333 | + |
| 334 | +static void rh_free_fn(void *ptr, void *arg) |
| 335 | +{ |
| 336 | + kfree(ptr); |
| 337 | +} |
| 338 | + |
| 339 | +static const struct rhashtable_params shm_rhash_params = { |
| 340 | + .head_offset = offsetof(struct shm_rhash, linkage), |
| 341 | + .key_len = sizeof(u64), |
| 342 | + .key_offset = offsetof(struct shm_rhash, global_id), |
| 343 | + .automatic_shrinking = true, |
| 344 | +}; |
| 345 | + |
| 346 | +struct tee_shm *optee_shm_from_ffa_handle(struct optee *optee, u64 global_id) |
| 347 | +{ |
| 348 | + struct tee_shm *shm = NULL; |
| 349 | + struct shm_rhash *r; |
| 350 | + |
| 351 | + mutex_lock(&optee->ffa.mutex); |
| 352 | + r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id, |
| 353 | + shm_rhash_params); |
| 354 | + if (r) |
| 355 | + shm = r->shm; |
| 356 | + mutex_unlock(&optee->ffa.mutex); |
| 357 | + |
| 358 | + return shm; |
| 359 | +} |
| 360 | + |
| 361 | +int optee_shm_add_ffa_handle(struct optee *optee, struct tee_shm *shm, |
| 362 | + u64 global_id) |
| 363 | +{ |
| 364 | + struct shm_rhash *r; |
| 365 | + int rc; |
| 366 | + |
| 367 | + r = kmalloc(sizeof(*r), GFP_KERNEL); |
| 368 | + if (!r) |
| 369 | + return -ENOMEM; |
| 370 | + r->shm = shm; |
| 371 | + r->global_id = global_id; |
| 372 | + |
| 373 | + mutex_lock(&optee->ffa.mutex); |
| 374 | + rc = rhashtable_lookup_insert_fast(&optee->ffa.global_ids, &r->linkage, |
| 375 | + shm_rhash_params); |
| 376 | + mutex_unlock(&optee->ffa.mutex); |
| 377 | + |
| 378 | + if (rc) |
| 379 | + kfree(r); |
| 380 | + |
| 381 | + return rc; |
| 382 | +} |
| 383 | + |
| 384 | +int optee_shm_rem_ffa_handle(struct optee *optee, u64 global_id) |
| 385 | +{ |
| 386 | + struct shm_rhash *r; |
| 387 | + int rc = -ENOENT; |
| 388 | + |
| 389 | + mutex_lock(&optee->ffa.mutex); |
| 390 | + r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id, |
| 391 | + shm_rhash_params); |
| 392 | + if (r) |
| 393 | + rc = rhashtable_remove_fast(&optee->ffa.global_ids, |
| 394 | + &r->linkage, shm_rhash_params); |
| 395 | + mutex_unlock(&optee->ffa.mutex); |
| 396 | + |
| 397 | + if (!rc) |
| 398 | + kfree(r); |
| 399 | + |
| 400 | + return rc; |
| 401 | +} |
| 402 | + |
| 403 | +static void from_msg_param_ffa_mem(struct optee *optee, struct tee_param *p, |
| 404 | + u32 attr, const struct optee_msg_param *mp) |
| 405 | +{ |
| 406 | + struct tee_shm *shm = NULL; |
| 407 | + u64 offs_high = 0; |
| 408 | + u64 offs_low = 0; |
| 409 | + |
| 410 | + p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT + |
| 411 | + attr - OPTEE_MSG_ATTR_TYPE_FMEM_INPUT; |
| 412 | + p->u.memref.size = mp->u.fmem.size; |
| 413 | + |
| 414 | + if (mp->u.fmem.global_id != OPTEE_MSG_FMEM_INVALID_GLOBAL_ID) |
| 415 | + shm = optee_shm_from_ffa_handle(optee, mp->u.fmem.global_id); |
| 416 | + p->u.memref.shm = shm; |
| 417 | + |
| 418 | + if (shm) { |
| 419 | + offs_low = mp->u.fmem.offs_low; |
| 420 | + offs_high = mp->u.fmem.offs_high; |
| 421 | + } |
| 422 | + p->u.memref.shm_offs = offs_low | offs_high << 32; |
| 423 | +} |
| 424 | + |
| 425 | +/** |
| 426 | + * optee_ffa_from_msg_param() - convert from OPTEE_MSG parameters to |
| 427 | + * struct tee_param |
| 428 | + * @optee: main service struct |
| 429 | + * @params: subsystem internal parameter representation |
| 430 | + * @num_params: number of elements in the parameter arrays |
| 431 | + * @msg_params: OPTEE_MSG parameters |
| 432 | + * |
| 433 | + * Returns 0 on success or <0 on failure |
| 434 | + */ |
| 435 | +static int optee_ffa_from_msg_param(struct optee *optee, |
| 436 | + struct tee_param *params, size_t num_params, |
| 437 | + const struct optee_msg_param *msg_params) |
| 438 | +{ |
| 439 | + size_t n; |
| 440 | + |
| 441 | + for (n = 0; n < num_params; n++) { |
| 442 | + struct tee_param *p = params + n; |
| 443 | + const struct optee_msg_param *mp = msg_params + n; |
| 444 | + u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK; |
| 445 | + |
| 446 | + switch (attr) { |
| 447 | + case OPTEE_MSG_ATTR_TYPE_NONE: |
| 448 | + p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE; |
| 449 | + memset(&p->u, 0, sizeof(p->u)); |
| 450 | + break; |
| 451 | + case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT: |
| 452 | + case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT: |
| 453 | + case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT: |
| 454 | + from_msg_param_value(p, attr, mp); |
| 455 | + break; |
| 456 | + case OPTEE_MSG_ATTR_TYPE_FMEM_INPUT: |
| 457 | + case OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT: |
| 458 | + case OPTEE_MSG_ATTR_TYPE_FMEM_INOUT: |
| 459 | + from_msg_param_ffa_mem(optee, p, attr, mp); |
| 460 | + break; |
| 461 | + default: |
| 462 | + return -EINVAL; |
| 463 | + } |
| 464 | + } |
| 465 | + |
| 466 | + return 0; |
| 467 | +} |
| 468 | + |
| 469 | +static int to_msg_param_ffa_mem(struct optee_msg_param *mp, |
| 470 | + const struct tee_param *p) |
| 471 | +{ |
| 472 | + struct tee_shm *shm = p->u.memref.shm; |
| 473 | + |
| 474 | + mp->attr = OPTEE_MSG_ATTR_TYPE_FMEM_INPUT + p->attr - |
| 475 | + TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT; |
| 476 | + |
| 477 | + if (shm) { |
| 478 | + u64 shm_offs = p->u.memref.shm_offs; |
| 479 | + |
| 480 | + mp->u.fmem.internal_offs = shm->offset; |
| 481 | + |
| 482 | + mp->u.fmem.offs_low = shm_offs; |
| 483 | + mp->u.fmem.offs_high = shm_offs >> 32; |
| 484 | + /* Check that the entire offset could be stored. */ |
| 485 | + if (mp->u.fmem.offs_high != shm_offs >> 32) |
| 486 | + return -EINVAL; |
| 487 | + |
| 488 | + mp->u.fmem.global_id = shm->sec_world_id; |
| 489 | + } else { |
| 490 | + memset(&mp->u, 0, sizeof(mp->u)); |
| 491 | + mp->u.fmem.global_id = OPTEE_MSG_FMEM_INVALID_GLOBAL_ID; |
| 492 | + } |
| 493 | + mp->u.fmem.size = p->u.memref.size; |
| 494 | + |
| 495 | + return 0; |
| 496 | +} |
| 497 | + |
| 498 | +/** |
| 499 | + * optee_ffa_to_msg_param() - convert from struct tee_params to OPTEE_MSG |
| 500 | + * parameters |
| 501 | + * @optee: main service struct |
| 502 | + * @msg_params: OPTEE_MSG parameters |
| 503 | + * @num_params: number of elements in the parameter arrays |
| 504 | + * @params: subsystem itnernal parameter representation |
| 505 | + * Returns 0 on success or <0 on failure |
| 506 | + */ |
| 507 | +static int optee_ffa_to_msg_param(struct optee *optee, |
| 508 | + struct optee_msg_param *msg_params, |
| 509 | + size_t num_params, |
| 510 | + const struct tee_param *params) |
| 511 | +{ |
| 512 | + size_t n; |
| 513 | + |
| 514 | + for (n = 0; n < num_params; n++) { |
| 515 | + const struct tee_param *p = params + n; |
| 516 | + struct optee_msg_param *mp = msg_params + n; |
| 517 | + |
| 518 | + switch (p->attr) { |
| 519 | + case TEE_IOCTL_PARAM_ATTR_TYPE_NONE: |
| 520 | + mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE; |
| 521 | + memset(&mp->u, 0, sizeof(mp->u)); |
| 522 | + break; |
| 523 | + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT: |
| 524 | + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: |
| 525 | + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: |
| 526 | + to_msg_param_value(mp, p); |
| 527 | + break; |
| 528 | + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT: |
| 529 | + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: |
| 530 | + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: |
| 531 | + if (to_msg_param_ffa_mem(mp, p)) |
| 532 | + return -EINVAL; |
| 533 | + break; |
| 534 | + default: |
| 535 | + return -EINVAL; |
| 536 | + } |
| 537 | + } |
| 538 | + |
| 539 | + return 0; |
| 540 | +} |
| 541 | + |
| 542 | +static bool optee_ffa_api_is_compatbile(struct ffa_device *ffa_dev, |
| 543 | + const struct ffa_dev_ops *ops) |
| 544 | +{ |
| 545 | + struct ffa_send_direct_data data = { OPTEE_FFA_GET_API_VERSION }; |
| 546 | + int rc; |
| 547 | + |
| 548 | + ops->mode_32bit_set(ffa_dev); |
| 549 | + |
| 550 | + rc = ops->sync_send_receive(ffa_dev, &data); |
| 551 | + if (rc) { |
| 552 | + pr_err("Unexpected error %d\n", rc); |
| 553 | + return false; |
| 554 | + } |
| 555 | + if (data.data0 != OPTEE_FFA_VERSION_MAJOR || |
| 556 | + data.data1 < OPTEE_FFA_VERSION_MINOR) { |
| 557 | + pr_err("Incompatible OP-TEE API version %lu.%lu", |
| 558 | + data.data0, data.data1); |
| 559 | + return false; |
| 560 | + } |
| 561 | + |
| 562 | + data = (struct ffa_send_direct_data){ OPTEE_FFA_GET_OS_VERSION }; |
| 563 | + rc = ops->sync_send_receive(ffa_dev, &data); |
| 564 | + if (rc) { |
| 565 | + pr_err("Unexpected error %d\n", rc); |
| 566 | + return false; |
| 567 | + } |
| 568 | + if (data.data2) |
| 569 | + pr_info("revision %lu.%lu (%08lx)", |
| 570 | + data.data0, data.data1, data.data2); |
| 571 | + else |
| 572 | + pr_info("revision %lu.%lu", data.data0, data.data1); |
| 573 | + |
| 574 | + return true; |
| 575 | +} |
| 576 | + |
| 577 | +static bool optee_ffa_exchange_caps(struct ffa_device *ffa_dev, |
| 578 | + const struct ffa_dev_ops *ops, |
| 579 | + u32 *sec_caps, unsigned int *rpc_arg_count) |
| 580 | +{ |
| 581 | + struct ffa_send_direct_data data = { OPTEE_FFA_EXCHANGE_CAPABILITIES }; |
| 582 | + int rc; |
| 583 | + |
| 584 | + rc = ops->sync_send_receive(ffa_dev, &data); |
| 585 | + if (rc) { |
| 586 | + pr_err("Unexpected error %d", rc); |
| 587 | + return false; |
| 588 | + } |
| 589 | + if (data.data0) { |
| 590 | + pr_err("Unexpected exchange error %lu", data.data0); |
| 591 | + return false; |
| 592 | + } |
| 593 | + |
| 594 | + *sec_caps = 0; |
| 595 | + *rpc_arg_count = (u8)data.data1; |
| 596 | + |
| 597 | + return true; |
| 598 | +} |
| 599 | + |
| 600 | +static struct tee_shm_pool *optee_ffa_config_dyn_shm(void) |
| 601 | +{ |
| 602 | + struct tee_shm_pool_mgr *priv_mgr; |
| 603 | + struct tee_shm_pool_mgr *dmabuf_mgr; |
| 604 | + void *rc; |
| 605 | + |
| 606 | + rc = optee_ffa_shm_pool_alloc_pages(); |
| 607 | + if (IS_ERR(rc)) |
| 608 | + return rc; |
| 609 | + priv_mgr = rc; |
| 610 | + |
| 611 | + rc = optee_ffa_shm_pool_alloc_pages(); |
| 612 | + if (IS_ERR(rc)) { |
| 613 | + tee_shm_pool_mgr_destroy(priv_mgr); |
| 614 | + return rc; |
| 615 | + } |
| 616 | + dmabuf_mgr = rc; |
| 617 | + |
| 618 | + rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr); |
| 619 | + if (IS_ERR(rc)) { |
| 620 | + tee_shm_pool_mgr_destroy(priv_mgr); |
| 621 | + tee_shm_pool_mgr_destroy(dmabuf_mgr); |
| 622 | + } |
| 623 | + |
| 624 | + return rc; |
| 625 | +} |
| 626 | + |
| 627 | +static const struct tee_driver_ops optee_ffa_clnt_ops = { |
| 628 | + .get_version = optee_ffa_get_version, |
| 629 | + .open = optee_open, |
| 630 | + .release = optee_release, |
| 631 | + .open_session = optee_open_session, |
| 632 | + .close_session = optee_close_session, |
| 633 | + .invoke_func = optee_invoke_func, |
| 634 | + .cancel_req = optee_cancel_req, |
| 635 | + .shm_register = optee_ffa_shm_register, |
| 636 | + .shm_unregister = optee_ffa_shm_unregister, |
| 637 | +}; |
| 638 | + |
| 639 | +static const struct tee_desc optee_ffa_clnt_desc = { |
| 640 | + .name = DRIVER_NAME "ffa-clnt", |
| 641 | + .ops = &optee_ffa_clnt_ops, |
| 642 | + .owner = THIS_MODULE, |
| 643 | +}; |
| 644 | + |
| 645 | +static const struct tee_driver_ops optee_ffa_supp_ops = { |
| 646 | + .get_version = optee_ffa_get_version, |
| 647 | + .open = optee_open, |
| 648 | + .release = optee_release_supp, |
| 649 | + .supp_recv = optee_supp_recv, |
| 650 | + .supp_send = optee_supp_send, |
| 651 | + .shm_register = optee_ffa_shm_register, /* same as for clnt ops */ |
| 652 | + .shm_unregister = optee_ffa_shm_unregister_supp, |
| 653 | +}; |
| 654 | + |
| 655 | +static const struct tee_desc optee_ffa_supp_desc = { |
| 656 | + .name = DRIVER_NAME "ffa-supp", |
| 657 | + .ops = &optee_ffa_supp_ops, |
| 658 | + .owner = THIS_MODULE, |
| 659 | + .flags = TEE_DESC_PRIVILEGED, |
| 660 | +}; |
| 661 | + |
| 662 | +static const struct optee_ops optee_ffa_ops = { |
| 663 | + .do_call_with_arg = optee_ffa_do_call_with_arg, |
| 664 | + .to_msg_param = optee_ffa_to_msg_param, |
| 665 | + .from_msg_param = optee_ffa_from_msg_param, |
| 666 | +}; |
| 667 | + |
| 668 | +static void optee_ffa_remove(struct ffa_device *ffa_dev) |
| 669 | +{ |
| 670 | + (void)ffa_dev; |
| 671 | +} |
| 672 | + |
| 673 | +static int optee_ffa_probe(struct ffa_device *ffa_dev) |
| 674 | +{ |
| 675 | + const struct ffa_dev_ops *ffa_ops; |
| 676 | + unsigned int rpc_arg_count; |
| 677 | + struct tee_device *teedev; |
| 678 | + struct optee *optee; |
| 679 | + u32 sec_caps; |
| 680 | + int rc; |
| 681 | + |
| 682 | + ffa_ops = ffa_dev_ops_get(ffa_dev); |
| 683 | + if (!ffa_ops) { |
| 684 | + pr_warn("failed \"method\" init: ffa\n"); |
| 685 | + return -ENOENT; |
| 686 | + } |
| 687 | + |
| 688 | + if (!optee_ffa_api_is_compatbile(ffa_dev, ffa_ops)) |
| 689 | + return -EINVAL; |
| 690 | + |
| 691 | + if (!optee_ffa_exchange_caps(ffa_dev, ffa_ops, &sec_caps, |
| 692 | + &rpc_arg_count)) |
| 693 | + return -EINVAL; |
| 694 | + |
| 695 | + optee = kzalloc(sizeof(*optee), GFP_KERNEL); |
| 696 | + if (!optee) { |
| 697 | + rc = -ENOMEM; |
| 698 | + goto err; |
| 699 | + } |
| 700 | + optee->pool = optee_ffa_config_dyn_shm(); |
| 701 | + if (IS_ERR(optee->pool)) { |
| 702 | + rc = PTR_ERR(optee->pool); |
| 703 | + optee->pool = NULL; |
| 704 | + goto err; |
| 705 | + } |
| 706 | + |
| 707 | + optee->ops = &optee_ffa_ops; |
| 708 | + optee->ffa.ffa_dev = ffa_dev; |
| 709 | + optee->ffa.ffa_ops = ffa_ops; |
| 710 | + optee->sec_caps = sec_caps; |
| 711 | + optee->rpc_arg_count = rpc_arg_count; |
| 712 | + |
| 713 | + teedev = tee_device_alloc(&optee_ffa_clnt_desc, NULL, optee->pool, |
| 714 | + optee); |
| 715 | + if (IS_ERR(teedev)) { |
| 716 | + rc = PTR_ERR(teedev); |
| 717 | + goto err; |
| 718 | + } |
| 719 | + optee->teedev = teedev; |
| 720 | + |
| 721 | + teedev = tee_device_alloc(&optee_ffa_supp_desc, NULL, optee->pool, |
| 722 | + optee); |
| 723 | + if (IS_ERR(teedev)) { |
| 724 | + rc = PTR_ERR(teedev); |
| 725 | + goto err; |
| 726 | + } |
| 727 | + optee->supp_teedev = teedev; |
| 728 | + |
| 729 | + rc = tee_device_register(optee->teedev); |
| 730 | + if (rc) |
| 731 | + goto err; |
| 732 | + |
| 733 | + rc = tee_device_register(optee->supp_teedev); |
| 734 | + if (rc) |
| 735 | + goto err; |
| 736 | + |
| 737 | + rc = rhashtable_init(&optee->ffa.global_ids, &shm_rhash_params); |
| 738 | + if (rc) |
| 739 | + goto err; |
| 740 | + mutex_init(&optee->ffa.mutex); |
| 741 | + mutex_init(&optee->call_queue.mutex); |
| 742 | + INIT_LIST_HEAD(&optee->call_queue.waiters); |
| 743 | + optee_wait_queue_init(&optee->wait_queue); |
| 744 | + optee_supp_init(&optee->supp); |
| 745 | + ffa_dev_set_drvdata(ffa_dev, optee); |
| 746 | + |
| 747 | + pr_info("initialized driver\n"); |
| 748 | + return 0; |
| 749 | +err: |
| 750 | + /* |
| 751 | + * tee_device_unregister() is safe to call even if the |
| 752 | + * devices hasn't been registered with |
| 753 | + * tee_device_register() yet. |
| 754 | + */ |
| 755 | + tee_device_unregister(optee->supp_teedev); |
| 756 | + tee_device_unregister(optee->teedev); |
| 757 | + if (optee->pool) |
| 758 | + tee_shm_pool_free(optee->pool); |
| 759 | + kfree(optee); |
| 760 | + return rc; |
| 761 | +} |
| 762 | + |
| 763 | +static const struct ffa_device_id optee_ffa_device_id[] = { |
| 764 | + /* 486178e0-e7f8-11e3-bc5e0002a5d5c51b */ |
| 765 | + { UUID_INIT(0x486178e0, 0xe7f8, 0x11e3, |
| 766 | + 0xbc, 0x5e, 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b) }, |
| 767 | + {} |
| 768 | +}; |
| 769 | + |
| 770 | +static struct ffa_driver optee_ffa_driver = { |
| 771 | + .name = "optee", |
| 772 | + .probe = optee_ffa_probe, |
| 773 | + .remove = optee_ffa_remove, |
| 774 | + .id_table = optee_ffa_device_id, |
| 775 | +}; |
| 776 | + |
| 777 | +module_ffa_driver(optee_ffa_driver); |
| 778 | +#endif /*CONFIG_ARM_FFA_TRANSPORT*/ |
| 779 | + |
| 780 | /* Simple wrapper functions to be able to use a function pointer */ |
| 781 | static void optee_smccc_smc(unsigned long a0, unsigned long a1, |
| 782 | unsigned long a2, unsigned long a3, |
| 783 | @@ -615,7 +1082,8 @@ static int optee_remove(struct platform_device *pdev) |
| 784 | * reference counters and also avoid wild pointers in secure world |
| 785 | * into the old shared memory range. |
| 786 | */ |
| 787 | - optee_disable_shm_cache(optee); |
| 788 | + if (!optee_is_ffa_based(optee)) |
| 789 | + optee_disable_shm_cache(optee); |
| 790 | |
| 791 | /* |
| 792 | * The two devices have to be unregistered before we can free the |
| 793 | @@ -631,6 +1099,14 @@ static int optee_remove(struct platform_device *pdev) |
| 794 | optee_supp_uninit(&optee->supp); |
| 795 | mutex_destroy(&optee->call_queue.mutex); |
| 796 | |
| 797 | +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| 798 | + if (optee->ffa.ffa_ops) { |
| 799 | + mutex_destroy(&optee->ffa.mutex); |
| 800 | + rhashtable_free_and_destroy(&optee->ffa.global_ids, |
| 801 | + rh_free_fn, NULL); |
| 802 | + } |
| 803 | +#endif /*CONFIG_ARM_FFA_TRANSPORT*/ |
| 804 | + |
| 805 | kfree(optee); |
| 806 | |
| 807 | return 0; |
| 808 | diff --git a/drivers/tee/optee/optee_ffa.h b/drivers/tee/optee/optee_ffa.h |
| 809 | new file mode 100644 |
| 810 | index 000000000000..ee3a03fc392c |
| 811 | --- /dev/null |
| 812 | +++ b/drivers/tee/optee/optee_ffa.h |
| 813 | @@ -0,0 +1,153 @@ |
| 814 | +/* SPDX-License-Identifier: BSD-2-Clause */ |
| 815 | +/* |
| 816 | + * Copyright (c) 2019-2021, Linaro Limited |
| 817 | + */ |
| 818 | + |
| 819 | +/* |
| 820 | + * This file is exported by OP-TEE and is kept in sync between secure world |
| 821 | + * and normal world drivers. We're using ARM FF-A 1.0 specification. |
| 822 | + */ |
| 823 | + |
| 824 | +#ifndef __OPTEE_FFA_H |
| 825 | +#define __OPTEE_FFA_H |
| 826 | + |
| 827 | +#include <linux/arm_ffa.h> |
| 828 | + |
| 829 | +/* |
| 830 | + * Normal world sends requests with FFA_MSG_SEND_DIRECT_REQ and |
| 831 | + * responses are returned with FFA_MSG_SEND_DIRECT_RESP for normal |
| 832 | + * messages. |
| 833 | + * |
| 834 | + * All requests with FFA_MSG_SEND_DIRECT_REQ and FFA_MSG_SEND_DIRECT_RESP |
| 835 | + * are using the AArch32 SMC calling convention with register usage as |
| 836 | + * defined in FF-A specification: |
| 837 | + * w0: Function ID (0x8400006F or 0x84000070) |
| 838 | + * w1: Source/Destination IDs |
| 839 | + * w2: Reserved (MBZ) |
| 840 | + * w3-w7: Implementation defined, free to be used below |
| 841 | + */ |
| 842 | + |
| 843 | +#define OPTEE_FFA_VERSION_MAJOR 1 |
| 844 | +#define OPTEE_FFA_VERSION_MINOR 0 |
| 845 | + |
| 846 | +#define OPTEE_FFA_BLOCKING_CALL(id) (id) |
| 847 | +#define OPTEE_FFA_YIELDING_CALL_BIT 31 |
| 848 | +#define OPTEE_FFA_YIELDING_CALL(id) ((id) | BIT(OPTEE_FFA_YIELDING_CALL_BIT)) |
| 849 | + |
| 850 | +/* |
| 851 | + * Returns the API version implemented, currently follows the FF-A version. |
| 852 | + * Call register usage: |
| 853 | + * w3: Service ID, OPTEE_FFA_GET_API_VERSION |
| 854 | + * w4-w7: Not used (MBZ) |
| 855 | + * |
| 856 | + * Return register usage: |
| 857 | + * w3: OPTEE_FFA_VERSION_MAJOR |
| 858 | + * w4: OPTEE_FFA_VERSION_MINOR |
| 859 | + * w5-w7: Not used (MBZ) |
| 860 | + */ |
| 861 | +#define OPTEE_FFA_GET_API_VERSION OPTEE_FFA_BLOCKING_CALL(0) |
| 862 | + |
| 863 | +/* |
| 864 | + * Returns the revision of OP-TEE. |
| 865 | + * |
| 866 | + * Used by non-secure world to figure out which version of the Trusted OS |
| 867 | + * is installed. Note that the returned revision is the revision of the |
| 868 | + * Trusted OS, not of the API. |
| 869 | + * |
| 870 | + * Call register usage: |
| 871 | + * w3: Service ID, OPTEE_FFA_GET_OS_VERSION |
| 872 | + * w4-w7: Unused (MBZ) |
| 873 | + * |
| 874 | + * Return register usage: |
| 875 | + * w3: CFG_OPTEE_REVISION_MAJOR |
| 876 | + * w4: CFG_OPTEE_REVISION_MINOR |
| 877 | + * w5: TEE_IMPL_GIT_SHA1 (or zero if not supported) |
| 878 | + */ |
| 879 | +#define OPTEE_FFA_GET_OS_VERSION OPTEE_FFA_BLOCKING_CALL(1) |
| 880 | + |
| 881 | +/* |
| 882 | + * Exchange capabilities between normal world and secure world. |
| 883 | + * |
| 884 | + * Currently there are no defined capabilities. When features are added new |
| 885 | + * capabilities may be added. |
| 886 | + * |
| 887 | + * Call register usage: |
| 888 | + * w3: Service ID, OPTEE_FFA_EXCHANGE_CAPABILITIES |
| 889 | + * w4-w7: Note used (MBZ) |
| 890 | + * |
| 891 | + * Return register usage: |
| 892 | + * w3: Error code, 0 on success |
| 893 | + * w4: Bit[7:0]: Number of parameters needed for RPC to be supplied |
| 894 | + * as the second MSG arg struct for |
| 895 | + * OPTEE_FFA_YIELDING_CALL_WITH_ARG. |
| 896 | + * Bit[31:8]: Reserved (MBZ) |
| 897 | + * w5-w7: Note used (MBZ) |
| 898 | + */ |
| 899 | +#define OPTEE_FFA_EXCHANGE_CAPABILITIES OPTEE_FFA_BLOCKING_CALL(2) |
| 900 | + |
| 901 | +/* |
| 902 | + * Unregister shared memory |
| 903 | + * |
| 904 | + * Call register usage: |
| 905 | + * w3: Service ID, OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM |
| 906 | + * w4: Shared memory handle, lower bits |
| 907 | + * w5: Shared memory handle, higher bits |
| 908 | + * w6-w7: Not used (MBZ) |
| 909 | + * |
| 910 | + * Return register usage: |
| 911 | + * w3: Error code, 0 on success |
| 912 | + * w4-w7: Note used (MBZ) |
| 913 | + */ |
| 914 | +#define OPTEE_FFA_UNREGISTER_SHM OPTEE_FFA_BLOCKING_CALL(3) |
| 915 | + |
| 916 | +/* |
| 917 | + * Call with struct optee_msg_arg as argument in the supplied shared memory |
| 918 | + * with a zero internal offset and normal cached memory attributes. |
| 919 | + * Register usage: |
| 920 | + * w3: Service ID, OPTEE_FFA_YIELDING_CALL_WITH_ARG |
| 921 | + * w4: Lower 32 bits of a 64-bit Shared memory handle |
| 922 | + * w5: Upper 32 bits of a 64-bit Shared memory handle |
| 923 | + * w6: Offset into shared memory pointing to a struct optee_msg_arg |
| 924 | + * right after the parameters of this struct (at offset |
| 925 | + * OPTEE_MSG_GET_ARG_SIZE(num_params) follows a struct optee_msg_arg |
| 926 | + * for RPC, this struct has reserved space for the number of RPC |
| 927 | + * parameters as returned by OPTEE_FFA_EXCHANGE_CAPABILITIES. |
| 928 | + * w7: Not used (MBZ) |
| 929 | + * Resume from RPC. Register usage: |
| 930 | + * w3: Service ID, OPTEE_FFA_YIELDING_CALL_RESUME |
| 931 | + * w4-w6: Not used (MBZ) |
| 932 | + * w7: Resume info |
| 933 | + * |
| 934 | + * Normal return (yielding call is completed). Register usage: |
| 935 | + * w3: Error code, 0 on success |
| 936 | + * w4: OPTEE_FFA_YIELDING_CALL_RETURN_DONE |
| 937 | + * w5-w7: Not used (MBZ) |
| 938 | + * |
| 939 | + * RPC interrupt return (RPC from secure world). Register usage: |
| 940 | + * w3: Error code == 0 |
| 941 | + * w4: Any defined RPC code but OPTEE_FFA_YIELDING_CALL_RETURN_DONE |
| 942 | + * w5-w6: Not used (MBZ) |
| 943 | + * w7: Resume info |
| 944 | + * |
| 945 | + * Possible error codes in register w3: |
| 946 | + * 0: Success |
| 947 | + * FFA_DENIED: w4 isn't one of OPTEE_FFA_YIELDING_CALL_START |
| 948 | + * OPTEE_FFA_YIELDING_CALL_RESUME |
| 949 | + * |
| 950 | + * Possible error codes for OPTEE_FFA_YIELDING_CALL_START, |
| 951 | + * FFA_BUSY: Number of OP-TEE OS threads exceeded, |
| 952 | + * try again later |
| 953 | + * FFA_DENIED: RPC shared memory object not found |
| 954 | + * FFA_INVALID_PARAMETER: Bad shared memory handle or offset into the memory |
| 955 | + * |
| 956 | + * Possible error codes for OPTEE_FFA_YIELDING_CALL_RESUME |
| 957 | + * FFA_INVALID_PARAMETER: Bad resume info |
| 958 | + */ |
| 959 | +#define OPTEE_FFA_YIELDING_CALL_WITH_ARG OPTEE_FFA_YIELDING_CALL(0) |
| 960 | +#define OPTEE_FFA_YIELDING_CALL_RESUME OPTEE_FFA_YIELDING_CALL(1) |
| 961 | + |
| 962 | +#define OPTEE_FFA_YIELDING_CALL_RETURN_DONE 0 |
| 963 | +#define OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD 1 |
| 964 | +#define OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT 2 |
| 965 | + |
| 966 | +#endif /*__OPTEE_FFA_H*/ |
| 967 | diff --git a/drivers/tee/optee/optee_msg.h b/drivers/tee/optee/optee_msg.h |
| 968 | index 5bef6a0165db..1ee943980c68 100644 |
| 969 | --- a/drivers/tee/optee/optee_msg.h |
| 970 | +++ b/drivers/tee/optee/optee_msg.h |
| 971 | @@ -28,6 +28,9 @@ |
| 972 | #define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 0x5 |
| 973 | #define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT 0x6 |
| 974 | #define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT 0x7 |
| 975 | +#define OPTEE_MSG_ATTR_TYPE_FMEM_INPUT OPTEE_MSG_ATTR_TYPE_RMEM_INPUT |
| 976 | +#define OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT |
| 977 | +#define OPTEE_MSG_ATTR_TYPE_FMEM_INOUT OPTEE_MSG_ATTR_TYPE_RMEM_INOUT |
| 978 | #define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT 0x9 |
| 979 | #define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT 0xa |
| 980 | #define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT 0xb |
| 981 | @@ -96,6 +99,8 @@ |
| 982 | */ |
| 983 | #define OPTEE_MSG_NONCONTIG_PAGE_SIZE 4096 |
| 984 | |
| 985 | +#define OPTEE_MSG_FMEM_INVALID_GLOBAL_ID 0xffffffffffffffff |
| 986 | + |
| 987 | /** |
| 988 | * struct optee_msg_param_tmem - temporary memory reference parameter |
| 989 | * @buf_ptr: Address of the buffer |
| 990 | @@ -127,6 +132,23 @@ struct optee_msg_param_rmem { |
| 991 | u64 shm_ref; |
| 992 | }; |
| 993 | |
| 994 | +/** |
| 995 | + * struct optee_msg_param_fmem - ffa memory reference parameter |
| 996 | + * @offs_lower: Lower bits of offset into shared memory reference |
| 997 | + * @offs_upper: Upper bits of offset into shared memory reference |
| 998 | + * @internal_offs: Internal offset into the first page of shared memory |
| 999 | + * reference |
| 1000 | + * @size: Size of the buffer |
| 1001 | + * @global_id: Global identifier of Shared memory |
| 1002 | + */ |
| 1003 | +struct optee_msg_param_fmem { |
| 1004 | + u32 offs_low; |
| 1005 | + u16 offs_high; |
| 1006 | + u16 internal_offs; |
| 1007 | + u64 size; |
| 1008 | + u64 global_id; |
| 1009 | +}; |
| 1010 | + |
| 1011 | /** |
| 1012 | * struct optee_msg_param_value - opaque value parameter |
| 1013 | * |
| 1014 | @@ -143,13 +165,15 @@ struct optee_msg_param_value { |
| 1015 | * @attr: attributes |
| 1016 | * @tmem: parameter by temporary memory reference |
| 1017 | * @rmem: parameter by registered memory reference |
| 1018 | + * @fmem: parameter by ffa registered memory reference |
| 1019 | * @value: parameter by opaque value |
| 1020 | * @octets: parameter by octet string |
| 1021 | * |
| 1022 | * @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in |
| 1023 | * the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value or octets, |
| 1024 | * OPTEE_MSG_ATTR_TYPE_TMEM_* indicates @tmem and |
| 1025 | - * OPTEE_MSG_ATTR_TYPE_RMEM_* indicates @rmem, |
| 1026 | + * OPTEE_MSG_ATTR_TYPE_RMEM_* or the alias PTEE_MSG_ATTR_TYPE_FMEM_* indicates |
| 1027 | + * @rmem or @fmem depending on the conduit. |
| 1028 | * OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used. |
| 1029 | */ |
| 1030 | struct optee_msg_param { |
| 1031 | @@ -157,6 +181,7 @@ struct optee_msg_param { |
| 1032 | union { |
| 1033 | struct optee_msg_param_tmem tmem; |
| 1034 | struct optee_msg_param_rmem rmem; |
| 1035 | + struct optee_msg_param_fmem fmem; |
| 1036 | struct optee_msg_param_value value; |
| 1037 | u8 octets[24]; |
| 1038 | } u; |
| 1039 | diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h |
| 1040 | index c5741e96e967..1ffe74e66d15 100644 |
| 1041 | --- a/drivers/tee/optee/optee_private.h |
| 1042 | +++ b/drivers/tee/optee/optee_private.h |
| 1043 | @@ -7,6 +7,7 @@ |
| 1044 | #define OPTEE_PRIVATE_H |
| 1045 | |
| 1046 | #include <linux/arm-smccc.h> |
| 1047 | +#include <linux/rhashtable.h> |
| 1048 | #include <linux/semaphore.h> |
| 1049 | #include <linux/tee_drv.h> |
| 1050 | #include <linux/types.h> |
| 1051 | @@ -20,6 +21,7 @@ |
| 1052 | #define TEEC_ERROR_NOT_SUPPORTED 0xFFFF000A |
| 1053 | #define TEEC_ERROR_COMMUNICATION 0xFFFF000E |
| 1054 | #define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C |
| 1055 | +#define TEEC_ERROR_BUSY 0xFFFF000D |
| 1056 | #define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010 |
| 1057 | |
| 1058 | #define TEEC_ORIGIN_COMMS 0x00000002 |
| 1059 | @@ -66,6 +68,22 @@ struct optee_supp { |
| 1060 | struct completion reqs_c; |
| 1061 | }; |
| 1062 | |
| 1063 | +/** |
| 1064 | + * struct optee_ffa_data - FFA communication struct |
| 1065 | + * @ffa_dev FFA device, contains the destination id, the id of |
| 1066 | + * OP-TEE in secure world |
| 1067 | + * @ffa_ops FFA operations |
| 1068 | + * @mutex Serializes access to @global_ids |
| 1069 | + * @global_ids FF-A shared memory global handle translation |
| 1070 | + */ |
| 1071 | +struct optee_ffa { |
| 1072 | + struct ffa_device *ffa_dev; |
| 1073 | + const struct ffa_dev_ops *ffa_ops; |
| 1074 | + /* Serializes access to @global_ids */ |
| 1075 | + struct mutex mutex; |
| 1076 | + struct rhashtable global_ids; |
| 1077 | +}; |
| 1078 | + |
| 1079 | struct optee; |
| 1080 | |
| 1081 | /** |
| 1082 | @@ -113,11 +131,15 @@ struct optee { |
| 1083 | struct tee_device *teedev; |
| 1084 | const struct optee_ops *ops; |
| 1085 | optee_invoke_fn *invoke_fn; |
| 1086 | +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| 1087 | + struct optee_ffa ffa; |
| 1088 | +#endif |
| 1089 | struct optee_call_queue call_queue; |
| 1090 | struct optee_wait_queue wait_queue; |
| 1091 | struct optee_supp supp; |
| 1092 | struct tee_shm_pool *pool; |
| 1093 | void *memremaped_shm; |
| 1094 | + unsigned int rpc_arg_count; |
| 1095 | u32 sec_caps; |
| 1096 | bool scan_bus_done; |
| 1097 | struct workqueue_struct *scan_bus_wq; |
| 1098 | @@ -206,6 +228,36 @@ void optee_fill_pages_list(u64 *dst, struct page **pages, int num_pages, |
| 1099 | #define PTA_CMD_GET_DEVICES_SUPP 0x1 |
| 1100 | int optee_enumerate_devices(u32 func); |
| 1101 | |
| 1102 | +int optee_shm_add_ffa_handle(struct optee *optee, struct tee_shm *shm, |
| 1103 | + u64 global_id); |
| 1104 | +int optee_shm_rem_ffa_handle(struct optee *optee, u64 global_id); |
| 1105 | + |
| 1106 | +struct tee_shm *optee_shm_from_ffa_handle(struct optee *optee, u64 global_id); |
| 1107 | + |
| 1108 | +int optee_ffa_shm_register(struct tee_context *ctx, struct tee_shm *shm, |
| 1109 | + struct page **pages, size_t num_pages, |
| 1110 | + unsigned long start); |
| 1111 | +int optee_ffa_shm_unregister(struct tee_context *ctx, struct tee_shm *shm); |
| 1112 | +int optee_ffa_shm_register_supp(struct tee_context *ctx, struct tee_shm *shm, |
| 1113 | + struct page **pages, size_t num_pages, |
| 1114 | + unsigned long start); |
| 1115 | +int optee_ffa_shm_unregister_supp(struct tee_context *ctx, |
| 1116 | + struct tee_shm *shm); |
| 1117 | + |
| 1118 | +int optee_ffa_do_call_with_arg(struct tee_context *ctx, struct tee_shm *arg); |
| 1119 | +int optee_ffa_rpc_shm_register(struct tee_context *ctx, struct tee_shm *shm); |
| 1120 | +void optee_handle_ffa_rpc(struct tee_context *ctx, u32 cmd, |
| 1121 | + struct optee_msg_arg *arg); |
| 1122 | + |
| 1123 | +static inline bool optee_is_ffa_based(struct optee *optee) |
| 1124 | +{ |
| 1125 | +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| 1126 | + return optee->ffa.ffa_ops; |
| 1127 | +#else |
| 1128 | + return false; |
| 1129 | +#endif |
| 1130 | +} |
| 1131 | + |
| 1132 | /* |
| 1133 | * Small helpers |
| 1134 | */ |
| 1135 | diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c |
| 1136 | index 39562fb6841e..865a9ab3cf65 100644 |
| 1137 | --- a/drivers/tee/optee/rpc.c |
| 1138 | +++ b/drivers/tee/optee/rpc.c |
| 1139 | @@ -10,6 +10,7 @@ |
| 1140 | #include <linux/i2c.h> |
| 1141 | #include <linux/slab.h> |
| 1142 | #include <linux/tee_drv.h> |
| 1143 | +#include "optee_ffa.h" |
| 1144 | #include "optee_private.h" |
| 1145 | #include "optee_smc.h" |
| 1146 | #include "optee_rpc_cmd.h" |
| 1147 | @@ -543,3 +544,120 @@ void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param, |
| 1148 | |
| 1149 | param->a0 = OPTEE_SMC_CALL_RETURN_FROM_RPC; |
| 1150 | } |
| 1151 | + |
| 1152 | +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| 1153 | +static void handle_ffa_rpc_func_cmd_shm_alloc(struct tee_context *ctx, |
| 1154 | + struct optee_msg_arg *arg) |
| 1155 | +{ |
| 1156 | + struct tee_shm *shm; |
| 1157 | + |
| 1158 | + if (arg->num_params != 1 || |
| 1159 | + arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) { |
| 1160 | + arg->ret = TEEC_ERROR_BAD_PARAMETERS; |
| 1161 | + return; |
| 1162 | + } |
| 1163 | + |
| 1164 | + switch (arg->params[0].u.value.a) { |
| 1165 | + case OPTEE_RPC_SHM_TYPE_APPL: |
| 1166 | + shm = cmd_alloc_suppl(ctx, arg->params[0].u.value.b); |
| 1167 | + break; |
| 1168 | + case OPTEE_RPC_SHM_TYPE_KERNEL: |
| 1169 | + shm = tee_shm_alloc(ctx, arg->params[0].u.value.b, |
| 1170 | + TEE_SHM_MAPPED); |
| 1171 | + break; |
| 1172 | + default: |
| 1173 | + arg->ret = TEEC_ERROR_BAD_PARAMETERS; |
| 1174 | + return; |
| 1175 | + } |
| 1176 | + |
| 1177 | + if (IS_ERR(shm)) { |
| 1178 | + arg->ret = TEEC_ERROR_OUT_OF_MEMORY; |
| 1179 | + return; |
| 1180 | + } |
| 1181 | + |
| 1182 | + arg->params[0] = (struct optee_msg_param){ |
| 1183 | + .attr = OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT, |
| 1184 | + .u.fmem.size = tee_shm_get_size(shm), |
| 1185 | + .u.fmem.global_id = shm->sec_world_id, |
| 1186 | + .u.fmem.internal_offs = shm->offset, |
| 1187 | + }; |
| 1188 | + |
| 1189 | + arg->ret = TEEC_SUCCESS; |
| 1190 | +} |
| 1191 | + |
| 1192 | +static void handle_ffa_rpc_func_cmd_shm_free(struct tee_context *ctx, |
| 1193 | + struct optee *optee, |
| 1194 | + struct optee_msg_arg *arg) |
| 1195 | +{ |
| 1196 | + struct tee_shm *shm; |
| 1197 | + |
| 1198 | + if (arg->num_params != 1 || |
| 1199 | + arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) |
| 1200 | + goto err_bad_param; |
| 1201 | + |
| 1202 | + shm = optee_shm_from_ffa_handle(optee, arg->params[0].u.value.b); |
| 1203 | + if (!shm) |
| 1204 | + goto err_bad_param; |
| 1205 | + switch (arg->params[0].u.value.a) { |
| 1206 | + case OPTEE_RPC_SHM_TYPE_APPL: |
| 1207 | + cmd_free_suppl(ctx, shm); |
| 1208 | + break; |
| 1209 | + case OPTEE_RPC_SHM_TYPE_KERNEL: |
| 1210 | + tee_shm_free(shm); |
| 1211 | + break; |
| 1212 | + default: |
| 1213 | + goto err_bad_param; |
| 1214 | + } |
| 1215 | + arg->ret = TEEC_SUCCESS; |
| 1216 | + return; |
| 1217 | + |
| 1218 | +err_bad_param: |
| 1219 | + arg->ret = TEEC_ERROR_BAD_PARAMETERS; |
| 1220 | +} |
| 1221 | + |
| 1222 | +static void handle_ffa_rpc_func_cmd(struct tee_context *ctx, |
| 1223 | + struct optee_msg_arg *arg) |
| 1224 | +{ |
| 1225 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 1226 | + |
| 1227 | + arg->ret_origin = TEEC_ORIGIN_COMMS; |
| 1228 | + switch (arg->cmd) { |
| 1229 | + case OPTEE_RPC_CMD_GET_TIME: |
| 1230 | + handle_rpc_func_cmd_get_time(arg); |
| 1231 | + break; |
| 1232 | + case OPTEE_RPC_CMD_WAIT_QUEUE: |
| 1233 | + handle_rpc_func_cmd_wq(optee, arg); |
| 1234 | + break; |
| 1235 | + case OPTEE_RPC_CMD_SUSPEND: |
| 1236 | + handle_rpc_func_cmd_wait(arg); |
| 1237 | + break; |
| 1238 | + case OPTEE_RPC_CMD_SHM_ALLOC: |
| 1239 | + handle_ffa_rpc_func_cmd_shm_alloc(ctx, arg); |
| 1240 | + break; |
| 1241 | + case OPTEE_RPC_CMD_SHM_FREE: |
| 1242 | + handle_ffa_rpc_func_cmd_shm_free(ctx, optee, arg); |
| 1243 | + break; |
| 1244 | + case OPTEE_RPC_CMD_I2C_TRANSFER: |
| 1245 | + handle_rpc_func_cmd_i2c_transfer(ctx, arg); |
| 1246 | + break; |
| 1247 | + default: |
| 1248 | + handle_rpc_supp_cmd(ctx, optee, arg); |
| 1249 | + } |
| 1250 | +} |
| 1251 | + |
| 1252 | +void optee_handle_ffa_rpc(struct tee_context *ctx, u32 cmd, |
| 1253 | + struct optee_msg_arg *arg) |
| 1254 | +{ |
| 1255 | + switch (cmd) { |
| 1256 | + case OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD: |
| 1257 | + handle_ffa_rpc_func_cmd(ctx, arg); |
| 1258 | + break; |
| 1259 | + case OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT: |
| 1260 | + /* Interrupt delivered by now */ |
| 1261 | + break; |
| 1262 | + default: |
| 1263 | + pr_warn("Unknown RPC func 0x%x\n", cmd); |
| 1264 | + break; |
| 1265 | + } |
| 1266 | +} |
| 1267 | +#endif /*CONFIG_ARM_FFA_TRANSPORT*/ |
| 1268 | -- |
| 1269 | 2.17.1 |
| 1270 | |