Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1 | From 2e26d6cc12475b86cfc0a42d6c21146b5ce1fe4b Mon Sep 17 00:00:00 2001 |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 2 | From: Jens Wiklander <jens.wiklander@linaro.org> |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 3 | Date: Wed, 21 Jul 2021 17:45:21 +0200 |
| 4 | Subject: [PATCH 12/40] optee: add FF-A support |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 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 |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 17 | Acked-by: Sumit Garg <sumit.garg@linaro.org> |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 18 | Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 19 | Upstream-Status: Pending [Not submitted to upstream yet] |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 20 | Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com> |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 21 | --- |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 22 | drivers/tee/optee/Makefile | 1 + |
| 23 | drivers/tee/optee/call.c | 13 +- |
| 24 | drivers/tee/optee/core.c | 16 +- |
| 25 | drivers/tee/optee/ffa_abi.c | 911 ++++++++++++++++++++++++++++++ |
| 26 | drivers/tee/optee/optee_ffa.h | 153 +++++ |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 27 | drivers/tee/optee/optee_msg.h | 27 +- |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 28 | drivers/tee/optee/optee_private.h | 35 +- |
| 29 | 7 files changed, 1143 insertions(+), 13 deletions(-) |
| 30 | create mode 100644 drivers/tee/optee/ffa_abi.c |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 31 | create mode 100644 drivers/tee/optee/optee_ffa.h |
| 32 | |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 33 | diff --git a/drivers/tee/optee/Makefile b/drivers/tee/optee/Makefile |
| 34 | index 97ac3ab3e1c0..66b8a17f14c4 100644 |
| 35 | --- a/drivers/tee/optee/Makefile |
| 36 | +++ b/drivers/tee/optee/Makefile |
| 37 | @@ -6,6 +6,7 @@ optee-objs += rpc.o |
| 38 | optee-objs += supp.o |
| 39 | optee-objs += device.o |
| 40 | optee-objs += smc_abi.o |
| 41 | +optee-objs += ffa_abi.o |
| 42 | |
| 43 | # for tracing framework to find optee_trace.h |
| 44 | CFLAGS_smc_abi.o := -I$(src) |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 45 | diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 46 | index 9ff4f0812825..b25cc1fac945 100644 |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 47 | --- a/drivers/tee/optee/call.c |
| 48 | +++ b/drivers/tee/optee/call.c |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 49 | @@ -107,11 +107,20 @@ static struct optee_session *find_session(struct optee_context_data *ctxdata, |
| 50 | struct tee_shm *optee_get_msg_arg(struct tee_context *ctx, size_t num_params, |
| 51 | struct optee_msg_arg **msg_arg) |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 52 | { |
| 53 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 54 | + size_t sz = OPTEE_MSG_GET_ARG_SIZE(num_params); |
| 55 | struct tee_shm *shm; |
| 56 | struct optee_msg_arg *ma; |
| 57 | |
| 58 | - shm = tee_shm_alloc(ctx, OPTEE_MSG_GET_ARG_SIZE(num_params), |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 59 | - TEE_SHM_MAPPED | TEE_SHM_PRIV); |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 60 | + /* |
| 61 | + * rpc_arg_count is set to the number of allocated parameters in |
| 62 | + * the RPC argument struct if a second MSG arg struct is expected. |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 63 | + * The second arg struct will then be used for RPC. |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 64 | + */ |
| 65 | + if (optee->rpc_arg_count) |
| 66 | + sz += OPTEE_MSG_GET_ARG_SIZE(optee->rpc_arg_count); |
| 67 | + |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 68 | + shm = tee_shm_alloc(ctx, sz, TEE_SHM_MAPPED | TEE_SHM_PRIV); |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 69 | if (IS_ERR(shm)) |
| 70 | return shm; |
| 71 | |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 72 | diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c |
| 73 | index 27b855325b33..ab2edfcc6c70 100644 |
| 74 | --- a/drivers/tee/optee/core.c |
| 75 | +++ b/drivers/tee/optee/core.c |
| 76 | @@ -172,6 +172,9 @@ void optee_remove_common(struct optee *optee) |
| 77 | mutex_destroy(&optee->call_queue.mutex); |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 78 | } |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 79 | |
| 80 | +static int smc_abi_rc; |
| 81 | +static int ffa_abi_rc; |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 82 | + |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 83 | static int optee_core_init(void) |
| 84 | { |
| 85 | /* |
| 86 | @@ -184,13 +187,22 @@ static int optee_core_init(void) |
| 87 | if (is_kdump_kernel()) |
| 88 | return -ENODEV; |
| 89 | |
| 90 | - return optee_smc_abi_register(); |
| 91 | + smc_abi_rc = optee_smc_abi_register(); |
| 92 | + ffa_abi_rc = optee_ffa_abi_register(); |
| 93 | + |
| 94 | + /* If both failed there's no point with this module */ |
| 95 | + if (smc_abi_rc && ffa_abi_rc) |
| 96 | + return smc_abi_rc; |
| 97 | + return 0; |
| 98 | } |
| 99 | module_init(optee_core_init); |
| 100 | |
| 101 | static void optee_core_exit(void) |
| 102 | { |
| 103 | - optee_smc_abi_unregister(); |
| 104 | + if (!smc_abi_rc) |
| 105 | + optee_smc_abi_unregister(); |
| 106 | + if (!ffa_abi_rc) |
| 107 | + optee_ffa_abi_unregister(); |
| 108 | } |
| 109 | module_exit(optee_core_exit); |
| 110 | |
| 111 | diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c |
| 112 | new file mode 100644 |
| 113 | index 000000000000..6defd1ec982a |
| 114 | --- /dev/null |
| 115 | +++ b/drivers/tee/optee/ffa_abi.c |
| 116 | @@ -0,0 +1,911 @@ |
| 117 | +// SPDX-License-Identifier: GPL-2.0-only |
| 118 | +/* |
| 119 | + * Copyright (c) 2021, Linaro Limited |
| 120 | + */ |
| 121 | + |
| 122 | +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 123 | + |
| 124 | +#include <linux/arm_ffa.h> |
| 125 | +#include <linux/errno.h> |
| 126 | +#include <linux/scatterlist.h> |
| 127 | +#include <linux/sched.h> |
| 128 | +#include <linux/slab.h> |
| 129 | +#include <linux/string.h> |
| 130 | +#include <linux/tee_drv.h> |
| 131 | +#include <linux/types.h> |
| 132 | +#include "optee_private.h" |
| 133 | +#include "optee_ffa.h" |
| 134 | +#include "optee_rpc_cmd.h" |
| 135 | + |
| 136 | +/* |
| 137 | + * This file implement the FF-A ABI used when communicating with secure world |
| 138 | + * OP-TEE OS via FF-A. |
| 139 | + * This file is divided into the following sections: |
| 140 | + * 1. Maintain a hash table for lookup of a global FF-A memory handle |
| 141 | + * 2. Convert between struct tee_param and struct optee_msg_param |
| 142 | + * 3. Low level support functions to register shared memory in secure world |
| 143 | + * 4. Dynamic shared memory pool based on alloc_pages() |
| 144 | + * 5. Do a normal scheduled call into secure world |
| 145 | + * 6. Driver initialization. |
| 146 | + */ |
| 147 | + |
| 148 | +/* |
| 149 | + * 1. Maintain a hash table for lookup of a global FF-A memory handle |
| 150 | + * |
| 151 | + * FF-A assigns a global memory handle for each piece shared memory. |
| 152 | + * This handle is then used when communicating with secure world. |
| 153 | + * |
| 154 | + * Main functions are optee_shm_add_ffa_handle() and optee_shm_rem_ffa_handle() |
| 155 | + */ |
| 156 | +struct shm_rhash { |
| 157 | + struct tee_shm *shm; |
| 158 | + u64 global_id; |
| 159 | + struct rhash_head linkage; |
| 160 | +}; |
| 161 | + |
| 162 | +static void rh_free_fn(void *ptr, void *arg) |
| 163 | +{ |
| 164 | + kfree(ptr); |
| 165 | +} |
| 166 | + |
| 167 | +static const struct rhashtable_params shm_rhash_params = { |
| 168 | + .head_offset = offsetof(struct shm_rhash, linkage), |
| 169 | + .key_len = sizeof(u64), |
| 170 | + .key_offset = offsetof(struct shm_rhash, global_id), |
| 171 | + .automatic_shrinking = true, |
| 172 | +}; |
| 173 | + |
| 174 | +static struct tee_shm *optee_shm_from_ffa_handle(struct optee *optee, |
| 175 | + u64 global_id) |
| 176 | +{ |
| 177 | + struct tee_shm *shm = NULL; |
| 178 | + struct shm_rhash *r; |
| 179 | + |
| 180 | + mutex_lock(&optee->ffa.mutex); |
| 181 | + r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id, |
| 182 | + shm_rhash_params); |
| 183 | + if (r) |
| 184 | + shm = r->shm; |
| 185 | + mutex_unlock(&optee->ffa.mutex); |
| 186 | + |
| 187 | + return shm; |
| 188 | +} |
| 189 | + |
| 190 | +static int optee_shm_add_ffa_handle(struct optee *optee, struct tee_shm *shm, |
| 191 | + u64 global_id) |
| 192 | +{ |
| 193 | + struct shm_rhash *r; |
| 194 | + int rc; |
| 195 | + |
| 196 | + r = kmalloc(sizeof(*r), GFP_KERNEL); |
| 197 | + if (!r) |
| 198 | + return -ENOMEM; |
| 199 | + r->shm = shm; |
| 200 | + r->global_id = global_id; |
| 201 | + |
| 202 | + mutex_lock(&optee->ffa.mutex); |
| 203 | + rc = rhashtable_lookup_insert_fast(&optee->ffa.global_ids, &r->linkage, |
| 204 | + shm_rhash_params); |
| 205 | + mutex_unlock(&optee->ffa.mutex); |
| 206 | + |
| 207 | + if (rc) |
| 208 | + kfree(r); |
| 209 | + |
| 210 | + return rc; |
| 211 | +} |
| 212 | + |
| 213 | +static int optee_shm_rem_ffa_handle(struct optee *optee, u64 global_id) |
| 214 | +{ |
| 215 | + struct shm_rhash *r; |
| 216 | + int rc = -ENOENT; |
| 217 | + |
| 218 | + mutex_lock(&optee->ffa.mutex); |
| 219 | + r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id, |
| 220 | + shm_rhash_params); |
| 221 | + if (r) |
| 222 | + rc = rhashtable_remove_fast(&optee->ffa.global_ids, |
| 223 | + &r->linkage, shm_rhash_params); |
| 224 | + mutex_unlock(&optee->ffa.mutex); |
| 225 | + |
| 226 | + if (!rc) |
| 227 | + kfree(r); |
| 228 | + |
| 229 | + return rc; |
| 230 | +} |
| 231 | + |
| 232 | +/* |
| 233 | + * 2. Convert between struct tee_param and struct optee_msg_param |
| 234 | + * |
| 235 | + * optee_ffa_from_msg_param() and optee_ffa_to_msg_param() are the main |
| 236 | + * functions. |
| 237 | + */ |
| 238 | + |
| 239 | +static void from_msg_param_ffa_mem(struct optee *optee, struct tee_param *p, |
| 240 | + u32 attr, const struct optee_msg_param *mp) |
| 241 | +{ |
| 242 | + struct tee_shm *shm = NULL; |
| 243 | + u64 offs_high = 0; |
| 244 | + u64 offs_low = 0; |
| 245 | + |
| 246 | + p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT + |
| 247 | + attr - OPTEE_MSG_ATTR_TYPE_FMEM_INPUT; |
| 248 | + p->u.memref.size = mp->u.fmem.size; |
| 249 | + |
| 250 | + if (mp->u.fmem.global_id != OPTEE_MSG_FMEM_INVALID_GLOBAL_ID) |
| 251 | + shm = optee_shm_from_ffa_handle(optee, mp->u.fmem.global_id); |
| 252 | + p->u.memref.shm = shm; |
| 253 | + |
| 254 | + if (shm) { |
| 255 | + offs_low = mp->u.fmem.offs_low; |
| 256 | + offs_high = mp->u.fmem.offs_high; |
| 257 | + } |
| 258 | + p->u.memref.shm_offs = offs_low | offs_high << 32; |
| 259 | +} |
| 260 | + |
| 261 | +/** |
| 262 | + * optee_ffa_from_msg_param() - convert from OPTEE_MSG parameters to |
| 263 | + * struct tee_param |
| 264 | + * @optee: main service struct |
| 265 | + * @params: subsystem internal parameter representation |
| 266 | + * @num_params: number of elements in the parameter arrays |
| 267 | + * @msg_params: OPTEE_MSG parameters |
| 268 | + * |
| 269 | + * Returns 0 on success or <0 on failure |
| 270 | + */ |
| 271 | +static int optee_ffa_from_msg_param(struct optee *optee, |
| 272 | + struct tee_param *params, size_t num_params, |
| 273 | + const struct optee_msg_param *msg_params) |
| 274 | +{ |
| 275 | + size_t n; |
| 276 | + |
| 277 | + for (n = 0; n < num_params; n++) { |
| 278 | + struct tee_param *p = params + n; |
| 279 | + const struct optee_msg_param *mp = msg_params + n; |
| 280 | + u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK; |
| 281 | + |
| 282 | + switch (attr) { |
| 283 | + case OPTEE_MSG_ATTR_TYPE_NONE: |
| 284 | + p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE; |
| 285 | + memset(&p->u, 0, sizeof(p->u)); |
| 286 | + break; |
| 287 | + case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT: |
| 288 | + case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT: |
| 289 | + case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT: |
| 290 | + optee_from_msg_param_value(p, attr, mp); |
| 291 | + break; |
| 292 | + case OPTEE_MSG_ATTR_TYPE_FMEM_INPUT: |
| 293 | + case OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT: |
| 294 | + case OPTEE_MSG_ATTR_TYPE_FMEM_INOUT: |
| 295 | + from_msg_param_ffa_mem(optee, p, attr, mp); |
| 296 | + break; |
| 297 | + default: |
| 298 | + return -EINVAL; |
| 299 | + } |
| 300 | + } |
| 301 | + |
| 302 | + return 0; |
| 303 | +} |
| 304 | + |
| 305 | +static int to_msg_param_ffa_mem(struct optee_msg_param *mp, |
| 306 | + const struct tee_param *p) |
| 307 | +{ |
| 308 | + struct tee_shm *shm = p->u.memref.shm; |
| 309 | + |
| 310 | + mp->attr = OPTEE_MSG_ATTR_TYPE_FMEM_INPUT + p->attr - |
| 311 | + TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT; |
| 312 | + |
| 313 | + if (shm) { |
| 314 | + u64 shm_offs = p->u.memref.shm_offs; |
| 315 | + |
| 316 | + mp->u.fmem.internal_offs = shm->offset; |
| 317 | + |
| 318 | + mp->u.fmem.offs_low = shm_offs; |
| 319 | + mp->u.fmem.offs_high = shm_offs >> 32; |
| 320 | + /* Check that the entire offset could be stored. */ |
| 321 | + if (mp->u.fmem.offs_high != shm_offs >> 32) |
| 322 | + return -EINVAL; |
| 323 | + |
| 324 | + mp->u.fmem.global_id = shm->sec_world_id; |
| 325 | + } else { |
| 326 | + memset(&mp->u, 0, sizeof(mp->u)); |
| 327 | + mp->u.fmem.global_id = OPTEE_MSG_FMEM_INVALID_GLOBAL_ID; |
| 328 | + } |
| 329 | + mp->u.fmem.size = p->u.memref.size; |
| 330 | + |
| 331 | + return 0; |
| 332 | +} |
| 333 | + |
| 334 | +/** |
| 335 | + * optee_ffa_to_msg_param() - convert from struct tee_params to OPTEE_MSG |
| 336 | + * parameters |
| 337 | + * @optee: main service struct |
| 338 | + * @msg_params: OPTEE_MSG parameters |
| 339 | + * @num_params: number of elements in the parameter arrays |
| 340 | + * @params: subsystem itnernal parameter representation |
| 341 | + * Returns 0 on success or <0 on failure |
| 342 | + */ |
| 343 | +static int optee_ffa_to_msg_param(struct optee *optee, |
| 344 | + struct optee_msg_param *msg_params, |
| 345 | + size_t num_params, |
| 346 | + const struct tee_param *params) |
| 347 | +{ |
| 348 | + size_t n; |
| 349 | + |
| 350 | + for (n = 0; n < num_params; n++) { |
| 351 | + const struct tee_param *p = params + n; |
| 352 | + struct optee_msg_param *mp = msg_params + n; |
| 353 | + |
| 354 | + switch (p->attr) { |
| 355 | + case TEE_IOCTL_PARAM_ATTR_TYPE_NONE: |
| 356 | + mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE; |
| 357 | + memset(&mp->u, 0, sizeof(mp->u)); |
| 358 | + break; |
| 359 | + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT: |
| 360 | + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: |
| 361 | + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: |
| 362 | + optee_to_msg_param_value(mp, p); |
| 363 | + break; |
| 364 | + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT: |
| 365 | + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: |
| 366 | + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: |
| 367 | + if (to_msg_param_ffa_mem(mp, p)) |
| 368 | + return -EINVAL; |
| 369 | + break; |
| 370 | + default: |
| 371 | + return -EINVAL; |
| 372 | + } |
| 373 | + } |
| 374 | + |
| 375 | + return 0; |
| 376 | +} |
| 377 | + |
| 378 | +/* |
| 379 | + * 3. Low level support functions to register shared memory in secure world |
| 380 | + * |
| 381 | + * Functions to register and unregister shared memory both for normal |
| 382 | + * clients and for tee-supplicant. |
| 383 | + */ |
| 384 | + |
| 385 | +static int optee_ffa_shm_register(struct tee_context *ctx, struct tee_shm *shm, |
| 386 | + struct page **pages, size_t num_pages, |
| 387 | + unsigned long start) |
| 388 | +{ |
| 389 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 390 | + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| 391 | + struct ffa_device *ffa_dev = optee->ffa.ffa_dev; |
| 392 | + struct ffa_mem_region_attributes mem_attr = { |
| 393 | + .receiver = ffa_dev->vm_id, |
| 394 | + .attrs = FFA_MEM_RW, |
| 395 | + }; |
| 396 | + struct ffa_mem_ops_args args = { |
| 397 | + .use_txbuf = true, |
| 398 | + .attrs = &mem_attr, |
| 399 | + .nattrs = 1, |
| 400 | + }; |
| 401 | + struct sg_table sgt; |
| 402 | + int rc; |
| 403 | + |
| 404 | + rc = optee_check_mem_type(start, num_pages); |
| 405 | + if (rc) |
| 406 | + return rc; |
| 407 | + |
| 408 | + rc = sg_alloc_table_from_pages(&sgt, pages, num_pages, 0, |
| 409 | + num_pages * PAGE_SIZE, GFP_KERNEL); |
| 410 | + if (rc) |
| 411 | + return rc; |
| 412 | + args.sg = sgt.sgl; |
| 413 | + rc = ffa_ops->memory_share(ffa_dev, &args); |
| 414 | + sg_free_table(&sgt); |
| 415 | + if (rc) |
| 416 | + return rc; |
| 417 | + |
| 418 | + rc = optee_shm_add_ffa_handle(optee, shm, args.g_handle); |
| 419 | + if (rc) { |
| 420 | + ffa_ops->memory_reclaim(args.g_handle, 0); |
| 421 | + return rc; |
| 422 | + } |
| 423 | + |
| 424 | + shm->sec_world_id = args.g_handle; |
| 425 | + |
| 426 | + return 0; |
| 427 | +} |
| 428 | + |
| 429 | +static int optee_ffa_shm_unregister(struct tee_context *ctx, |
| 430 | + struct tee_shm *shm) |
| 431 | +{ |
| 432 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 433 | + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| 434 | + struct ffa_device *ffa_dev = optee->ffa.ffa_dev; |
| 435 | + u64 global_handle = shm->sec_world_id; |
| 436 | + struct ffa_send_direct_data data = { |
| 437 | + .data0 = OPTEE_FFA_UNREGISTER_SHM, |
| 438 | + .data1 = (u32)global_handle, |
| 439 | + .data2 = (u32)(global_handle >> 32) |
| 440 | + }; |
| 441 | + int rc; |
| 442 | + |
| 443 | + optee_shm_rem_ffa_handle(optee, global_handle); |
| 444 | + shm->sec_world_id = 0; |
| 445 | + |
| 446 | + rc = ffa_ops->sync_send_receive(ffa_dev, &data); |
| 447 | + if (rc) |
| 448 | + pr_err("Unregister SHM id 0x%llx rc %d\n", global_handle, rc); |
| 449 | + |
| 450 | + rc = ffa_ops->memory_reclaim(global_handle, 0); |
| 451 | + if (rc) |
| 452 | + pr_err("mem_reclain: 0x%llx %d", global_handle, rc); |
| 453 | + |
| 454 | + return rc; |
| 455 | +} |
| 456 | + |
| 457 | +static int optee_ffa_shm_unregister_supp(struct tee_context *ctx, |
| 458 | + struct tee_shm *shm) |
| 459 | +{ |
| 460 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 461 | + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| 462 | + u64 global_handle = shm->sec_world_id; |
| 463 | + int rc; |
| 464 | + |
| 465 | + /* |
| 466 | + * We're skipping the OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM call |
| 467 | + * since this is OP-TEE freeing via RPC so it has already retired |
| 468 | + * this ID. |
| 469 | + */ |
| 470 | + |
| 471 | + optee_shm_rem_ffa_handle(optee, global_handle); |
| 472 | + rc = ffa_ops->memory_reclaim(global_handle, 0); |
| 473 | + if (rc) |
| 474 | + pr_err("mem_reclain: 0x%llx %d", global_handle, rc); |
| 475 | + |
| 476 | + shm->sec_world_id = 0; |
| 477 | + |
| 478 | + return rc; |
| 479 | +} |
| 480 | + |
| 481 | +/* |
| 482 | + * 4. Dynamic shared memory pool based on alloc_pages() |
| 483 | + * |
| 484 | + * Implements an OP-TEE specific shared memory pool. |
| 485 | + * The main function is optee_ffa_shm_pool_alloc_pages(). |
| 486 | + */ |
| 487 | + |
| 488 | +static int pool_ffa_op_alloc(struct tee_shm_pool_mgr *poolm, |
| 489 | + struct tee_shm *shm, size_t size) |
| 490 | +{ |
| 491 | + return optee_pool_op_alloc_helper(poolm, shm, size, |
| 492 | + optee_ffa_shm_register); |
| 493 | +} |
| 494 | + |
| 495 | +static void pool_ffa_op_free(struct tee_shm_pool_mgr *poolm, |
| 496 | + struct tee_shm *shm) |
| 497 | +{ |
| 498 | + optee_ffa_shm_unregister(shm->ctx, shm); |
| 499 | + free_pages((unsigned long)shm->kaddr, get_order(shm->size)); |
| 500 | + shm->kaddr = NULL; |
| 501 | +} |
| 502 | + |
| 503 | +static void pool_ffa_op_destroy_poolmgr(struct tee_shm_pool_mgr *poolm) |
| 504 | +{ |
| 505 | + kfree(poolm); |
| 506 | +} |
| 507 | + |
| 508 | +static const struct tee_shm_pool_mgr_ops pool_ffa_ops = { |
| 509 | + .alloc = pool_ffa_op_alloc, |
| 510 | + .free = pool_ffa_op_free, |
| 511 | + .destroy_poolmgr = pool_ffa_op_destroy_poolmgr, |
| 512 | +}; |
| 513 | + |
| 514 | +/** |
| 515 | + * optee_ffa_shm_pool_alloc_pages() - create page-based allocator pool |
| 516 | + * |
| 517 | + * This pool is used with OP-TEE over FF-A. In this case command buffers |
| 518 | + * and such are allocated from kernel's own memory. |
| 519 | + */ |
| 520 | +static struct tee_shm_pool_mgr *optee_ffa_shm_pool_alloc_pages(void) |
| 521 | +{ |
| 522 | + struct tee_shm_pool_mgr *mgr = kzalloc(sizeof(*mgr), GFP_KERNEL); |
| 523 | + |
| 524 | + if (!mgr) |
| 525 | + return ERR_PTR(-ENOMEM); |
| 526 | + |
| 527 | + mgr->ops = &pool_ffa_ops; |
| 528 | + |
| 529 | + return mgr; |
| 530 | +} |
| 531 | + |
| 532 | +/* |
| 533 | + * 5. Do a normal scheduled call into secure world |
| 534 | + * |
| 535 | + * The function optee_ffa_do_call_with_arg() performs a normal scheduled |
| 536 | + * call into secure world. During this call may normal world request help |
| 537 | + * from normal world using RPCs, Remote Procedure Calls. This includes |
| 538 | + * delivery of non-secure interrupts to for instance allow rescheduling of |
| 539 | + * the current task. |
| 540 | + */ |
| 541 | + |
| 542 | +static void handle_ffa_rpc_func_cmd_shm_alloc(struct tee_context *ctx, |
| 543 | + struct optee_msg_arg *arg) |
| 544 | +{ |
| 545 | + struct tee_shm *shm; |
| 546 | + |
| 547 | + if (arg->num_params != 1 || |
| 548 | + arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) { |
| 549 | + arg->ret = TEEC_ERROR_BAD_PARAMETERS; |
| 550 | + return; |
| 551 | + } |
| 552 | + |
| 553 | + switch (arg->params[0].u.value.a) { |
| 554 | + case OPTEE_RPC_SHM_TYPE_APPL: |
| 555 | + shm = optee_rpc_cmd_alloc_suppl(ctx, arg->params[0].u.value.b); |
| 556 | + break; |
| 557 | + case OPTEE_RPC_SHM_TYPE_KERNEL: |
| 558 | + shm = tee_shm_alloc(ctx, arg->params[0].u.value.b, |
| 559 | + TEE_SHM_MAPPED | TEE_SHM_PRIV); |
| 560 | + break; |
| 561 | + default: |
| 562 | + arg->ret = TEEC_ERROR_BAD_PARAMETERS; |
| 563 | + return; |
| 564 | + } |
| 565 | + |
| 566 | + if (IS_ERR(shm)) { |
| 567 | + arg->ret = TEEC_ERROR_OUT_OF_MEMORY; |
| 568 | + return; |
| 569 | + } |
| 570 | + |
| 571 | + arg->params[0] = (struct optee_msg_param){ |
| 572 | + .attr = OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT, |
| 573 | + .u.fmem.size = tee_shm_get_size(shm), |
| 574 | + .u.fmem.global_id = shm->sec_world_id, |
| 575 | + .u.fmem.internal_offs = shm->offset, |
| 576 | + }; |
| 577 | + |
| 578 | + arg->ret = TEEC_SUCCESS; |
| 579 | +} |
| 580 | + |
| 581 | +static void handle_ffa_rpc_func_cmd_shm_free(struct tee_context *ctx, |
| 582 | + struct optee *optee, |
| 583 | + struct optee_msg_arg *arg) |
| 584 | +{ |
| 585 | + struct tee_shm *shm; |
| 586 | + |
| 587 | + if (arg->num_params != 1 || |
| 588 | + arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) |
| 589 | + goto err_bad_param; |
| 590 | + |
| 591 | + shm = optee_shm_from_ffa_handle(optee, arg->params[0].u.value.b); |
| 592 | + if (!shm) |
| 593 | + goto err_bad_param; |
| 594 | + switch (arg->params[0].u.value.a) { |
| 595 | + case OPTEE_RPC_SHM_TYPE_APPL: |
| 596 | + optee_rpc_cmd_free_suppl(ctx, shm); |
| 597 | + break; |
| 598 | + case OPTEE_RPC_SHM_TYPE_KERNEL: |
| 599 | + tee_shm_free(shm); |
| 600 | + break; |
| 601 | + default: |
| 602 | + goto err_bad_param; |
| 603 | + } |
| 604 | + arg->ret = TEEC_SUCCESS; |
| 605 | + return; |
| 606 | + |
| 607 | +err_bad_param: |
| 608 | + arg->ret = TEEC_ERROR_BAD_PARAMETERS; |
| 609 | +} |
| 610 | + |
| 611 | +static void handle_ffa_rpc_func_cmd(struct tee_context *ctx, |
| 612 | + struct optee_msg_arg *arg) |
| 613 | +{ |
| 614 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 615 | + |
| 616 | + arg->ret_origin = TEEC_ORIGIN_COMMS; |
| 617 | + switch (arg->cmd) { |
| 618 | + case OPTEE_RPC_CMD_SHM_ALLOC: |
| 619 | + handle_ffa_rpc_func_cmd_shm_alloc(ctx, arg); |
| 620 | + break; |
| 621 | + case OPTEE_RPC_CMD_SHM_FREE: |
| 622 | + handle_ffa_rpc_func_cmd_shm_free(ctx, optee, arg); |
| 623 | + break; |
| 624 | + default: |
| 625 | + optee_rpc_cmd(ctx, optee, arg); |
| 626 | + } |
| 627 | +} |
| 628 | + |
| 629 | +static void optee_handle_ffa_rpc(struct tee_context *ctx, u32 cmd, |
| 630 | + struct optee_msg_arg *arg) |
| 631 | +{ |
| 632 | + switch (cmd) { |
| 633 | + case OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD: |
| 634 | + handle_ffa_rpc_func_cmd(ctx, arg); |
| 635 | + break; |
| 636 | + case OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT: |
| 637 | + /* Interrupt delivered by now */ |
| 638 | + break; |
| 639 | + default: |
| 640 | + pr_warn("Unknown RPC func 0x%x\n", cmd); |
| 641 | + break; |
| 642 | + } |
| 643 | +} |
| 644 | + |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 645 | +static int optee_ffa_yielding_call(struct tee_context *ctx, |
| 646 | + struct ffa_send_direct_data *data, |
| 647 | + struct optee_msg_arg *rpc_arg) |
| 648 | +{ |
| 649 | + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| 650 | + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| 651 | + struct ffa_device *ffa_dev = optee->ffa.ffa_dev; |
| 652 | + struct optee_call_waiter w; |
| 653 | + u32 cmd = data->data0; |
| 654 | + u32 w4 = data->data1; |
| 655 | + u32 w5 = data->data2; |
| 656 | + u32 w6 = data->data3; |
| 657 | + int rc; |
| 658 | + |
| 659 | + /* Initialize waiter */ |
| 660 | + optee_cq_wait_init(&optee->call_queue, &w); |
| 661 | + while (true) { |
| 662 | + rc = ffa_ops->sync_send_receive(ffa_dev, data); |
| 663 | + if (rc) |
| 664 | + goto done; |
| 665 | + |
| 666 | + switch ((int)data->data0) { |
| 667 | + case TEEC_SUCCESS: |
| 668 | + break; |
| 669 | + case TEEC_ERROR_BUSY: |
| 670 | + if (cmd == OPTEE_FFA_YIELDING_CALL_RESUME) { |
| 671 | + rc = -EIO; |
| 672 | + goto done; |
| 673 | + } |
| 674 | + |
| 675 | + /* |
| 676 | + * Out of threads in secure world, wait for a thread |
| 677 | + * become available. |
| 678 | + */ |
| 679 | + optee_cq_wait_for_completion(&optee->call_queue, &w); |
| 680 | + data->data0 = cmd; |
| 681 | + data->data1 = w4; |
| 682 | + data->data2 = w5; |
| 683 | + data->data3 = w6; |
| 684 | + continue; |
| 685 | + default: |
| 686 | + rc = -EIO; |
| 687 | + goto done; |
| 688 | + } |
| 689 | + |
| 690 | + if (data->data1 == OPTEE_FFA_YIELDING_CALL_RETURN_DONE) |
| 691 | + goto done; |
| 692 | + |
| 693 | + /* |
| 694 | + * OP-TEE has returned with a RPC request. |
| 695 | + * |
| 696 | + * Note that data->data4 (passed in register w7) is already |
| 697 | + * filled in by ffa_ops->sync_send_receive() returning |
| 698 | + * above. |
| 699 | + */ |
| 700 | + cond_resched(); |
| 701 | + optee_handle_ffa_rpc(ctx, data->data1, rpc_arg); |
| 702 | + cmd = OPTEE_FFA_YIELDING_CALL_RESUME; |
| 703 | + data->data0 = cmd; |
| 704 | + data->data1 = 0; |
| 705 | + data->data2 = 0; |
| 706 | + data->data3 = 0; |
| 707 | + } |
| 708 | +done: |
| 709 | + /* |
| 710 | + * We're done with our thread in secure world, if there's any |
| 711 | + * thread waiters wake up one. |
| 712 | + */ |
| 713 | + optee_cq_wait_final(&optee->call_queue, &w); |
| 714 | + |
| 715 | + return rc; |
| 716 | +} |
| 717 | + |
| 718 | +/** |
| 719 | + * optee_ffa_do_call_with_arg() - Do a FF-A call to enter OP-TEE in secure world |
| 720 | + * @ctx: calling context |
| 721 | + * @shm: shared memory holding the message to pass to secure world |
| 722 | + * |
| 723 | + * Does a FF-A call to OP-TEE in secure world and handles eventual resulting |
| 724 | + * Remote Procedure Calls (RPC) from OP-TEE. |
| 725 | + * |
| 726 | + * Returns return code from FF-A, 0 is OK |
| 727 | + */ |
| 728 | + |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 729 | +static int optee_ffa_do_call_with_arg(struct tee_context *ctx, |
| 730 | + struct tee_shm *shm) |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 731 | +{ |
| 732 | + struct ffa_send_direct_data data = { |
| 733 | + .data0 = OPTEE_FFA_YIELDING_CALL_WITH_ARG, |
| 734 | + .data1 = (u32)shm->sec_world_id, |
| 735 | + .data2 = (u32)(shm->sec_world_id >> 32), |
| 736 | + .data3 = shm->offset, |
| 737 | + }; |
| 738 | + struct optee_msg_arg *arg = tee_shm_get_va(shm, 0); |
| 739 | + unsigned int rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params); |
| 740 | + struct optee_msg_arg *rpc_arg = tee_shm_get_va(shm, rpc_arg_offs); |
| 741 | + |
| 742 | + return optee_ffa_yielding_call(ctx, &data, rpc_arg); |
| 743 | +} |
| 744 | + |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 745 | +/* |
| 746 | + * 6. Driver initialization |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 747 | + * |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 748 | + * During driver inititialization is the OP-TEE Secure Partition is probed |
| 749 | + * to find out which features it supports so the driver can be initialized |
| 750 | + * with a matching configuration. |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 751 | + */ |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 752 | + |
| 753 | +static bool optee_ffa_api_is_compatbile(struct ffa_device *ffa_dev, |
| 754 | + const struct ffa_dev_ops *ops) |
| 755 | +{ |
| 756 | + struct ffa_send_direct_data data = { OPTEE_FFA_GET_API_VERSION }; |
| 757 | + int rc; |
| 758 | + |
| 759 | + ops->mode_32bit_set(ffa_dev); |
| 760 | + |
| 761 | + rc = ops->sync_send_receive(ffa_dev, &data); |
| 762 | + if (rc) { |
| 763 | + pr_err("Unexpected error %d\n", rc); |
| 764 | + return false; |
| 765 | + } |
| 766 | + if (data.data0 != OPTEE_FFA_VERSION_MAJOR || |
| 767 | + data.data1 < OPTEE_FFA_VERSION_MINOR) { |
| 768 | + pr_err("Incompatible OP-TEE API version %lu.%lu", |
| 769 | + data.data0, data.data1); |
| 770 | + return false; |
| 771 | + } |
| 772 | + |
| 773 | + data = (struct ffa_send_direct_data){ OPTEE_FFA_GET_OS_VERSION }; |
| 774 | + rc = ops->sync_send_receive(ffa_dev, &data); |
| 775 | + if (rc) { |
| 776 | + pr_err("Unexpected error %d\n", rc); |
| 777 | + return false; |
| 778 | + } |
| 779 | + if (data.data2) |
| 780 | + pr_info("revision %lu.%lu (%08lx)", |
| 781 | + data.data0, data.data1, data.data2); |
| 782 | + else |
| 783 | + pr_info("revision %lu.%lu", data.data0, data.data1); |
| 784 | + |
| 785 | + return true; |
| 786 | +} |
| 787 | + |
| 788 | +static bool optee_ffa_exchange_caps(struct ffa_device *ffa_dev, |
| 789 | + const struct ffa_dev_ops *ops, |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 790 | + unsigned int *rpc_arg_count) |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 791 | +{ |
| 792 | + struct ffa_send_direct_data data = { OPTEE_FFA_EXCHANGE_CAPABILITIES }; |
| 793 | + int rc; |
| 794 | + |
| 795 | + rc = ops->sync_send_receive(ffa_dev, &data); |
| 796 | + if (rc) { |
| 797 | + pr_err("Unexpected error %d", rc); |
| 798 | + return false; |
| 799 | + } |
| 800 | + if (data.data0) { |
| 801 | + pr_err("Unexpected exchange error %lu", data.data0); |
| 802 | + return false; |
| 803 | + } |
| 804 | + |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 805 | + *rpc_arg_count = (u8)data.data1; |
| 806 | + |
| 807 | + return true; |
| 808 | +} |
| 809 | + |
| 810 | +static struct tee_shm_pool *optee_ffa_config_dyn_shm(void) |
| 811 | +{ |
| 812 | + struct tee_shm_pool_mgr *priv_mgr; |
| 813 | + struct tee_shm_pool_mgr *dmabuf_mgr; |
| 814 | + void *rc; |
| 815 | + |
| 816 | + rc = optee_ffa_shm_pool_alloc_pages(); |
| 817 | + if (IS_ERR(rc)) |
| 818 | + return rc; |
| 819 | + priv_mgr = rc; |
| 820 | + |
| 821 | + rc = optee_ffa_shm_pool_alloc_pages(); |
| 822 | + if (IS_ERR(rc)) { |
| 823 | + tee_shm_pool_mgr_destroy(priv_mgr); |
| 824 | + return rc; |
| 825 | + } |
| 826 | + dmabuf_mgr = rc; |
| 827 | + |
| 828 | + rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr); |
| 829 | + if (IS_ERR(rc)) { |
| 830 | + tee_shm_pool_mgr_destroy(priv_mgr); |
| 831 | + tee_shm_pool_mgr_destroy(dmabuf_mgr); |
| 832 | + } |
| 833 | + |
| 834 | + return rc; |
| 835 | +} |
| 836 | + |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 837 | +static void optee_ffa_get_version(struct tee_device *teedev, |
| 838 | + struct tee_ioctl_version_data *vers) |
| 839 | +{ |
| 840 | + struct tee_ioctl_version_data v = { |
| 841 | + .impl_id = TEE_IMPL_ID_OPTEE, |
| 842 | + .impl_caps = TEE_OPTEE_CAP_TZ, |
| 843 | + .gen_caps = TEE_GEN_CAP_GP | TEE_GEN_CAP_REG_MEM | |
| 844 | + TEE_GEN_CAP_MEMREF_NULL, |
| 845 | + }; |
| 846 | + |
| 847 | + *vers = v; |
| 848 | +} |
| 849 | + |
| 850 | +static int optee_ffa_open(struct tee_context *ctx) |
| 851 | +{ |
| 852 | + return optee_open(ctx, true); |
| 853 | +} |
| 854 | + |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 855 | +static const struct tee_driver_ops optee_ffa_clnt_ops = { |
| 856 | + .get_version = optee_ffa_get_version, |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 857 | + .open = optee_ffa_open, |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 858 | + .release = optee_release, |
| 859 | + .open_session = optee_open_session, |
| 860 | + .close_session = optee_close_session, |
| 861 | + .invoke_func = optee_invoke_func, |
| 862 | + .cancel_req = optee_cancel_req, |
| 863 | + .shm_register = optee_ffa_shm_register, |
| 864 | + .shm_unregister = optee_ffa_shm_unregister, |
| 865 | +}; |
| 866 | + |
| 867 | +static const struct tee_desc optee_ffa_clnt_desc = { |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 868 | + .name = DRIVER_NAME "-ffa-clnt", |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 869 | + .ops = &optee_ffa_clnt_ops, |
| 870 | + .owner = THIS_MODULE, |
| 871 | +}; |
| 872 | + |
| 873 | +static const struct tee_driver_ops optee_ffa_supp_ops = { |
| 874 | + .get_version = optee_ffa_get_version, |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 875 | + .open = optee_ffa_open, |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 876 | + .release = optee_release_supp, |
| 877 | + .supp_recv = optee_supp_recv, |
| 878 | + .supp_send = optee_supp_send, |
| 879 | + .shm_register = optee_ffa_shm_register, /* same as for clnt ops */ |
| 880 | + .shm_unregister = optee_ffa_shm_unregister_supp, |
| 881 | +}; |
| 882 | + |
| 883 | +static const struct tee_desc optee_ffa_supp_desc = { |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 884 | + .name = DRIVER_NAME "-ffa-supp", |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 885 | + .ops = &optee_ffa_supp_ops, |
| 886 | + .owner = THIS_MODULE, |
| 887 | + .flags = TEE_DESC_PRIVILEGED, |
| 888 | +}; |
| 889 | + |
| 890 | +static const struct optee_ops optee_ffa_ops = { |
| 891 | + .do_call_with_arg = optee_ffa_do_call_with_arg, |
| 892 | + .to_msg_param = optee_ffa_to_msg_param, |
| 893 | + .from_msg_param = optee_ffa_from_msg_param, |
| 894 | +}; |
| 895 | + |
| 896 | +static void optee_ffa_remove(struct ffa_device *ffa_dev) |
| 897 | +{ |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 898 | + struct optee *optee = ffa_dev->dev.driver_data; |
| 899 | + |
| 900 | + optee_remove_common(optee); |
| 901 | + |
| 902 | + mutex_destroy(&optee->ffa.mutex); |
| 903 | + rhashtable_free_and_destroy(&optee->ffa.global_ids, rh_free_fn, NULL); |
| 904 | + |
| 905 | + kfree(optee); |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 906 | +} |
| 907 | + |
| 908 | +static int optee_ffa_probe(struct ffa_device *ffa_dev) |
| 909 | +{ |
| 910 | + const struct ffa_dev_ops *ffa_ops; |
| 911 | + unsigned int rpc_arg_count; |
| 912 | + struct tee_device *teedev; |
| 913 | + struct optee *optee; |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 914 | + int rc; |
| 915 | + |
| 916 | + ffa_ops = ffa_dev_ops_get(ffa_dev); |
| 917 | + if (!ffa_ops) { |
| 918 | + pr_warn("failed \"method\" init: ffa\n"); |
| 919 | + return -ENOENT; |
| 920 | + } |
| 921 | + |
| 922 | + if (!optee_ffa_api_is_compatbile(ffa_dev, ffa_ops)) |
| 923 | + return -EINVAL; |
| 924 | + |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 925 | + if (!optee_ffa_exchange_caps(ffa_dev, ffa_ops, &rpc_arg_count)) |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 926 | + return -EINVAL; |
| 927 | + |
| 928 | + optee = kzalloc(sizeof(*optee), GFP_KERNEL); |
| 929 | + if (!optee) { |
| 930 | + rc = -ENOMEM; |
| 931 | + goto err; |
| 932 | + } |
| 933 | + optee->pool = optee_ffa_config_dyn_shm(); |
| 934 | + if (IS_ERR(optee->pool)) { |
| 935 | + rc = PTR_ERR(optee->pool); |
| 936 | + optee->pool = NULL; |
| 937 | + goto err; |
| 938 | + } |
| 939 | + |
| 940 | + optee->ops = &optee_ffa_ops; |
| 941 | + optee->ffa.ffa_dev = ffa_dev; |
| 942 | + optee->ffa.ffa_ops = ffa_ops; |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 943 | + optee->rpc_arg_count = rpc_arg_count; |
| 944 | + |
| 945 | + teedev = tee_device_alloc(&optee_ffa_clnt_desc, NULL, optee->pool, |
| 946 | + optee); |
| 947 | + if (IS_ERR(teedev)) { |
| 948 | + rc = PTR_ERR(teedev); |
| 949 | + goto err; |
| 950 | + } |
| 951 | + optee->teedev = teedev; |
| 952 | + |
| 953 | + teedev = tee_device_alloc(&optee_ffa_supp_desc, NULL, optee->pool, |
| 954 | + optee); |
| 955 | + if (IS_ERR(teedev)) { |
| 956 | + rc = PTR_ERR(teedev); |
| 957 | + goto err; |
| 958 | + } |
| 959 | + optee->supp_teedev = teedev; |
| 960 | + |
| 961 | + rc = tee_device_register(optee->teedev); |
| 962 | + if (rc) |
| 963 | + goto err; |
| 964 | + |
| 965 | + rc = tee_device_register(optee->supp_teedev); |
| 966 | + if (rc) |
| 967 | + goto err; |
| 968 | + |
| 969 | + rc = rhashtable_init(&optee->ffa.global_ids, &shm_rhash_params); |
| 970 | + if (rc) |
| 971 | + goto err; |
| 972 | + mutex_init(&optee->ffa.mutex); |
| 973 | + mutex_init(&optee->call_queue.mutex); |
| 974 | + INIT_LIST_HEAD(&optee->call_queue.waiters); |
| 975 | + optee_wait_queue_init(&optee->wait_queue); |
| 976 | + optee_supp_init(&optee->supp); |
| 977 | + ffa_dev_set_drvdata(ffa_dev, optee); |
| 978 | + |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 979 | + rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES); |
| 980 | + if (rc) { |
| 981 | + optee_ffa_remove(ffa_dev); |
| 982 | + return rc; |
| 983 | + } |
| 984 | + |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 985 | + pr_info("initialized driver\n"); |
| 986 | + return 0; |
| 987 | +err: |
| 988 | + /* |
| 989 | + * tee_device_unregister() is safe to call even if the |
| 990 | + * devices hasn't been registered with |
| 991 | + * tee_device_register() yet. |
| 992 | + */ |
| 993 | + tee_device_unregister(optee->supp_teedev); |
| 994 | + tee_device_unregister(optee->teedev); |
| 995 | + if (optee->pool) |
| 996 | + tee_shm_pool_free(optee->pool); |
| 997 | + kfree(optee); |
| 998 | + return rc; |
| 999 | +} |
| 1000 | + |
| 1001 | +static const struct ffa_device_id optee_ffa_device_id[] = { |
| 1002 | + /* 486178e0-e7f8-11e3-bc5e0002a5d5c51b */ |
| 1003 | + { UUID_INIT(0x486178e0, 0xe7f8, 0x11e3, |
| 1004 | + 0xbc, 0x5e, 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b) }, |
| 1005 | + {} |
| 1006 | +}; |
| 1007 | + |
| 1008 | +static struct ffa_driver optee_ffa_driver = { |
| 1009 | + .name = "optee", |
| 1010 | + .probe = optee_ffa_probe, |
| 1011 | + .remove = optee_ffa_remove, |
| 1012 | + .id_table = optee_ffa_device_id, |
| 1013 | +}; |
| 1014 | + |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1015 | +int optee_ffa_abi_register(void) |
| 1016 | +{ |
| 1017 | + if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT)) |
| 1018 | + return ffa_register(&optee_ffa_driver); |
| 1019 | + else |
| 1020 | + return -EOPNOTSUPP; |
| 1021 | +} |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1022 | + |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1023 | +void optee_ffa_abi_unregister(void) |
| 1024 | +{ |
| 1025 | + if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT)) |
| 1026 | + ffa_unregister(&optee_ffa_driver); |
| 1027 | +} |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1028 | diff --git a/drivers/tee/optee/optee_ffa.h b/drivers/tee/optee/optee_ffa.h |
| 1029 | new file mode 100644 |
| 1030 | index 000000000000..ee3a03fc392c |
| 1031 | --- /dev/null |
| 1032 | +++ b/drivers/tee/optee/optee_ffa.h |
| 1033 | @@ -0,0 +1,153 @@ |
| 1034 | +/* SPDX-License-Identifier: BSD-2-Clause */ |
| 1035 | +/* |
| 1036 | + * Copyright (c) 2019-2021, Linaro Limited |
| 1037 | + */ |
| 1038 | + |
| 1039 | +/* |
| 1040 | + * This file is exported by OP-TEE and is kept in sync between secure world |
| 1041 | + * and normal world drivers. We're using ARM FF-A 1.0 specification. |
| 1042 | + */ |
| 1043 | + |
| 1044 | +#ifndef __OPTEE_FFA_H |
| 1045 | +#define __OPTEE_FFA_H |
| 1046 | + |
| 1047 | +#include <linux/arm_ffa.h> |
| 1048 | + |
| 1049 | +/* |
| 1050 | + * Normal world sends requests with FFA_MSG_SEND_DIRECT_REQ and |
| 1051 | + * responses are returned with FFA_MSG_SEND_DIRECT_RESP for normal |
| 1052 | + * messages. |
| 1053 | + * |
| 1054 | + * All requests with FFA_MSG_SEND_DIRECT_REQ and FFA_MSG_SEND_DIRECT_RESP |
| 1055 | + * are using the AArch32 SMC calling convention with register usage as |
| 1056 | + * defined in FF-A specification: |
| 1057 | + * w0: Function ID (0x8400006F or 0x84000070) |
| 1058 | + * w1: Source/Destination IDs |
| 1059 | + * w2: Reserved (MBZ) |
| 1060 | + * w3-w7: Implementation defined, free to be used below |
| 1061 | + */ |
| 1062 | + |
| 1063 | +#define OPTEE_FFA_VERSION_MAJOR 1 |
| 1064 | +#define OPTEE_FFA_VERSION_MINOR 0 |
| 1065 | + |
| 1066 | +#define OPTEE_FFA_BLOCKING_CALL(id) (id) |
| 1067 | +#define OPTEE_FFA_YIELDING_CALL_BIT 31 |
| 1068 | +#define OPTEE_FFA_YIELDING_CALL(id) ((id) | BIT(OPTEE_FFA_YIELDING_CALL_BIT)) |
| 1069 | + |
| 1070 | +/* |
| 1071 | + * Returns the API version implemented, currently follows the FF-A version. |
| 1072 | + * Call register usage: |
| 1073 | + * w3: Service ID, OPTEE_FFA_GET_API_VERSION |
| 1074 | + * w4-w7: Not used (MBZ) |
| 1075 | + * |
| 1076 | + * Return register usage: |
| 1077 | + * w3: OPTEE_FFA_VERSION_MAJOR |
| 1078 | + * w4: OPTEE_FFA_VERSION_MINOR |
| 1079 | + * w5-w7: Not used (MBZ) |
| 1080 | + */ |
| 1081 | +#define OPTEE_FFA_GET_API_VERSION OPTEE_FFA_BLOCKING_CALL(0) |
| 1082 | + |
| 1083 | +/* |
| 1084 | + * Returns the revision of OP-TEE. |
| 1085 | + * |
| 1086 | + * Used by non-secure world to figure out which version of the Trusted OS |
| 1087 | + * is installed. Note that the returned revision is the revision of the |
| 1088 | + * Trusted OS, not of the API. |
| 1089 | + * |
| 1090 | + * Call register usage: |
| 1091 | + * w3: Service ID, OPTEE_FFA_GET_OS_VERSION |
| 1092 | + * w4-w7: Unused (MBZ) |
| 1093 | + * |
| 1094 | + * Return register usage: |
| 1095 | + * w3: CFG_OPTEE_REVISION_MAJOR |
| 1096 | + * w4: CFG_OPTEE_REVISION_MINOR |
| 1097 | + * w5: TEE_IMPL_GIT_SHA1 (or zero if not supported) |
| 1098 | + */ |
| 1099 | +#define OPTEE_FFA_GET_OS_VERSION OPTEE_FFA_BLOCKING_CALL(1) |
| 1100 | + |
| 1101 | +/* |
| 1102 | + * Exchange capabilities between normal world and secure world. |
| 1103 | + * |
| 1104 | + * Currently there are no defined capabilities. When features are added new |
| 1105 | + * capabilities may be added. |
| 1106 | + * |
| 1107 | + * Call register usage: |
| 1108 | + * w3: Service ID, OPTEE_FFA_EXCHANGE_CAPABILITIES |
| 1109 | + * w4-w7: Note used (MBZ) |
| 1110 | + * |
| 1111 | + * Return register usage: |
| 1112 | + * w3: Error code, 0 on success |
| 1113 | + * w4: Bit[7:0]: Number of parameters needed for RPC to be supplied |
| 1114 | + * as the second MSG arg struct for |
| 1115 | + * OPTEE_FFA_YIELDING_CALL_WITH_ARG. |
| 1116 | + * Bit[31:8]: Reserved (MBZ) |
| 1117 | + * w5-w7: Note used (MBZ) |
| 1118 | + */ |
| 1119 | +#define OPTEE_FFA_EXCHANGE_CAPABILITIES OPTEE_FFA_BLOCKING_CALL(2) |
| 1120 | + |
| 1121 | +/* |
| 1122 | + * Unregister shared memory |
| 1123 | + * |
| 1124 | + * Call register usage: |
| 1125 | + * w3: Service ID, OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM |
| 1126 | + * w4: Shared memory handle, lower bits |
| 1127 | + * w5: Shared memory handle, higher bits |
| 1128 | + * w6-w7: Not used (MBZ) |
| 1129 | + * |
| 1130 | + * Return register usage: |
| 1131 | + * w3: Error code, 0 on success |
| 1132 | + * w4-w7: Note used (MBZ) |
| 1133 | + */ |
| 1134 | +#define OPTEE_FFA_UNREGISTER_SHM OPTEE_FFA_BLOCKING_CALL(3) |
| 1135 | + |
| 1136 | +/* |
| 1137 | + * Call with struct optee_msg_arg as argument in the supplied shared memory |
| 1138 | + * with a zero internal offset and normal cached memory attributes. |
| 1139 | + * Register usage: |
| 1140 | + * w3: Service ID, OPTEE_FFA_YIELDING_CALL_WITH_ARG |
| 1141 | + * w4: Lower 32 bits of a 64-bit Shared memory handle |
| 1142 | + * w5: Upper 32 bits of a 64-bit Shared memory handle |
| 1143 | + * w6: Offset into shared memory pointing to a struct optee_msg_arg |
| 1144 | + * right after the parameters of this struct (at offset |
| 1145 | + * OPTEE_MSG_GET_ARG_SIZE(num_params) follows a struct optee_msg_arg |
| 1146 | + * for RPC, this struct has reserved space for the number of RPC |
| 1147 | + * parameters as returned by OPTEE_FFA_EXCHANGE_CAPABILITIES. |
| 1148 | + * w7: Not used (MBZ) |
| 1149 | + * Resume from RPC. Register usage: |
| 1150 | + * w3: Service ID, OPTEE_FFA_YIELDING_CALL_RESUME |
| 1151 | + * w4-w6: Not used (MBZ) |
| 1152 | + * w7: Resume info |
| 1153 | + * |
| 1154 | + * Normal return (yielding call is completed). Register usage: |
| 1155 | + * w3: Error code, 0 on success |
| 1156 | + * w4: OPTEE_FFA_YIELDING_CALL_RETURN_DONE |
| 1157 | + * w5-w7: Not used (MBZ) |
| 1158 | + * |
| 1159 | + * RPC interrupt return (RPC from secure world). Register usage: |
| 1160 | + * w3: Error code == 0 |
| 1161 | + * w4: Any defined RPC code but OPTEE_FFA_YIELDING_CALL_RETURN_DONE |
| 1162 | + * w5-w6: Not used (MBZ) |
| 1163 | + * w7: Resume info |
| 1164 | + * |
| 1165 | + * Possible error codes in register w3: |
| 1166 | + * 0: Success |
| 1167 | + * FFA_DENIED: w4 isn't one of OPTEE_FFA_YIELDING_CALL_START |
| 1168 | + * OPTEE_FFA_YIELDING_CALL_RESUME |
| 1169 | + * |
| 1170 | + * Possible error codes for OPTEE_FFA_YIELDING_CALL_START, |
| 1171 | + * FFA_BUSY: Number of OP-TEE OS threads exceeded, |
| 1172 | + * try again later |
| 1173 | + * FFA_DENIED: RPC shared memory object not found |
| 1174 | + * FFA_INVALID_PARAMETER: Bad shared memory handle or offset into the memory |
| 1175 | + * |
| 1176 | + * Possible error codes for OPTEE_FFA_YIELDING_CALL_RESUME |
| 1177 | + * FFA_INVALID_PARAMETER: Bad resume info |
| 1178 | + */ |
| 1179 | +#define OPTEE_FFA_YIELDING_CALL_WITH_ARG OPTEE_FFA_YIELDING_CALL(0) |
| 1180 | +#define OPTEE_FFA_YIELDING_CALL_RESUME OPTEE_FFA_YIELDING_CALL(1) |
| 1181 | + |
| 1182 | +#define OPTEE_FFA_YIELDING_CALL_RETURN_DONE 0 |
| 1183 | +#define OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD 1 |
| 1184 | +#define OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT 2 |
| 1185 | + |
| 1186 | +#endif /*__OPTEE_FFA_H*/ |
| 1187 | diff --git a/drivers/tee/optee/optee_msg.h b/drivers/tee/optee/optee_msg.h |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1188 | index e3d72d09c484..2422e185d400 100644 |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1189 | --- a/drivers/tee/optee/optee_msg.h |
| 1190 | +++ b/drivers/tee/optee/optee_msg.h |
| 1191 | @@ -28,6 +28,9 @@ |
| 1192 | #define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 0x5 |
| 1193 | #define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT 0x6 |
| 1194 | #define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT 0x7 |
| 1195 | +#define OPTEE_MSG_ATTR_TYPE_FMEM_INPUT OPTEE_MSG_ATTR_TYPE_RMEM_INPUT |
| 1196 | +#define OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT |
| 1197 | +#define OPTEE_MSG_ATTR_TYPE_FMEM_INOUT OPTEE_MSG_ATTR_TYPE_RMEM_INOUT |
| 1198 | #define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT 0x9 |
| 1199 | #define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT 0xa |
| 1200 | #define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT 0xb |
| 1201 | @@ -96,6 +99,8 @@ |
| 1202 | */ |
| 1203 | #define OPTEE_MSG_NONCONTIG_PAGE_SIZE 4096 |
| 1204 | |
| 1205 | +#define OPTEE_MSG_FMEM_INVALID_GLOBAL_ID 0xffffffffffffffff |
| 1206 | + |
| 1207 | /** |
| 1208 | * struct optee_msg_param_tmem - temporary memory reference parameter |
| 1209 | * @buf_ptr: Address of the buffer |
| 1210 | @@ -127,6 +132,23 @@ struct optee_msg_param_rmem { |
| 1211 | u64 shm_ref; |
| 1212 | }; |
| 1213 | |
| 1214 | +/** |
| 1215 | + * struct optee_msg_param_fmem - ffa memory reference parameter |
| 1216 | + * @offs_lower: Lower bits of offset into shared memory reference |
| 1217 | + * @offs_upper: Upper bits of offset into shared memory reference |
| 1218 | + * @internal_offs: Internal offset into the first page of shared memory |
| 1219 | + * reference |
| 1220 | + * @size: Size of the buffer |
| 1221 | + * @global_id: Global identifier of Shared memory |
| 1222 | + */ |
| 1223 | +struct optee_msg_param_fmem { |
| 1224 | + u32 offs_low; |
| 1225 | + u16 offs_high; |
| 1226 | + u16 internal_offs; |
| 1227 | + u64 size; |
| 1228 | + u64 global_id; |
| 1229 | +}; |
| 1230 | + |
| 1231 | /** |
| 1232 | * struct optee_msg_param_value - opaque value parameter |
| 1233 | * |
| 1234 | @@ -143,13 +165,15 @@ struct optee_msg_param_value { |
| 1235 | * @attr: attributes |
| 1236 | * @tmem: parameter by temporary memory reference |
| 1237 | * @rmem: parameter by registered memory reference |
| 1238 | + * @fmem: parameter by ffa registered memory reference |
| 1239 | * @value: parameter by opaque value |
| 1240 | * @octets: parameter by octet string |
| 1241 | * |
| 1242 | * @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in |
| 1243 | * the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value or octets, |
| 1244 | * OPTEE_MSG_ATTR_TYPE_TMEM_* indicates @tmem and |
| 1245 | - * OPTEE_MSG_ATTR_TYPE_RMEM_* indicates @rmem, |
| 1246 | + * OPTEE_MSG_ATTR_TYPE_RMEM_* or the alias PTEE_MSG_ATTR_TYPE_FMEM_* indicates |
| 1247 | + * @rmem or @fmem depending on the conduit. |
| 1248 | * OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used. |
| 1249 | */ |
| 1250 | struct optee_msg_param { |
| 1251 | @@ -157,6 +181,7 @@ struct optee_msg_param { |
| 1252 | union { |
| 1253 | struct optee_msg_param_tmem tmem; |
| 1254 | struct optee_msg_param_rmem rmem; |
| 1255 | + struct optee_msg_param_fmem fmem; |
| 1256 | struct optee_msg_param_value value; |
| 1257 | u8 octets[24]; |
| 1258 | } u; |
| 1259 | diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1260 | index 40af6b059b20..6660e05298db 100644 |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1261 | --- a/drivers/tee/optee/optee_private.h |
| 1262 | +++ b/drivers/tee/optee/optee_private.h |
| 1263 | @@ -7,6 +7,7 @@ |
| 1264 | #define OPTEE_PRIVATE_H |
| 1265 | |
| 1266 | #include <linux/arm-smccc.h> |
| 1267 | +#include <linux/rhashtable.h> |
| 1268 | #include <linux/semaphore.h> |
| 1269 | #include <linux/tee_drv.h> |
| 1270 | #include <linux/types.h> |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1271 | @@ -22,6 +23,7 @@ |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1272 | #define TEEC_ERROR_NOT_SUPPORTED 0xFFFF000A |
| 1273 | #define TEEC_ERROR_COMMUNICATION 0xFFFF000E |
| 1274 | #define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C |
| 1275 | +#define TEEC_ERROR_BUSY 0xFFFF000D |
| 1276 | #define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010 |
| 1277 | |
| 1278 | #define TEEC_ORIGIN_COMMS 0x00000002 |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1279 | @@ -73,19 +75,28 @@ struct optee_supp { |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1280 | struct completion reqs_c; |
| 1281 | }; |
| 1282 | |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1283 | -/** |
| 1284 | - * struct optee_smc - SMC ABI specifics |
| 1285 | - * @invoke_fn: function to issue smc or hvc |
| 1286 | - * @memremaped_shm virtual address of memory in shared memory pool |
| 1287 | - * @sec_caps: secure world capabilities defined by |
| 1288 | - * OPTEE_SMC_SEC_CAP_* in optee_smc.h |
| 1289 | - */ |
| 1290 | struct optee_smc { |
| 1291 | optee_invoke_fn *invoke_fn; |
| 1292 | void *memremaped_shm; |
| 1293 | u32 sec_caps; |
| 1294 | }; |
| 1295 | |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1296 | +/** |
| 1297 | + * struct optee_ffa_data - FFA communication struct |
| 1298 | + * @ffa_dev FFA device, contains the destination id, the id of |
| 1299 | + * OP-TEE in secure world |
| 1300 | + * @ffa_ops FFA operations |
| 1301 | + * @mutex Serializes access to @global_ids |
| 1302 | + * @global_ids FF-A shared memory global handle translation |
| 1303 | + */ |
| 1304 | +struct optee_ffa { |
| 1305 | + struct ffa_device *ffa_dev; |
| 1306 | + const struct ffa_dev_ops *ffa_ops; |
| 1307 | + /* Serializes access to @global_ids */ |
| 1308 | + struct mutex mutex; |
| 1309 | + struct rhashtable global_ids; |
| 1310 | +}; |
| 1311 | + |
| 1312 | struct optee; |
| 1313 | |
| 1314 | /** |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1315 | @@ -116,11 +127,13 @@ struct optee_ops { |
| 1316 | * world |
| 1317 | * @teedev: client device |
| 1318 | * @smc: specific to SMC ABI |
| 1319 | + * @ffa: specific to FF-A ABI |
| 1320 | * @call_queue: queue of threads waiting to call @invoke_fn |
| 1321 | * @wait_queue: queue of threads from secure world waiting for a |
| 1322 | * secure world sync object |
| 1323 | * @supp: supplicant synchronization struct for RPC to supplicant |
| 1324 | * @pool: shared memory pool |
| 1325 | + * @rpc_arg_count: If > 0 number of RPC parameters to make room for |
| 1326 | * @scan_bus_done flag if device registation was already done. |
| 1327 | * @scan_bus_wq workqueue to scan optee bus and register optee drivers |
| 1328 | * @scan_bus_work workq to scan optee bus and register optee drivers |
| 1329 | @@ -129,11 +142,15 @@ struct optee { |
| 1330 | struct tee_device *supp_teedev; |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1331 | struct tee_device *teedev; |
| 1332 | const struct optee_ops *ops; |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1333 | - struct optee_smc smc; |
| 1334 | + union { |
| 1335 | + struct optee_smc smc; |
| 1336 | + struct optee_ffa ffa; |
| 1337 | + }; |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1338 | struct optee_call_queue call_queue; |
| 1339 | struct optee_wait_queue wait_queue; |
| 1340 | struct optee_supp supp; |
| 1341 | struct tee_shm_pool *pool; |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1342 | + unsigned int rpc_arg_count; |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1343 | bool scan_bus_done; |
| 1344 | struct workqueue_struct *scan_bus_wq; |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1345 | struct work_struct scan_bus_work; |
| 1346 | @@ -266,5 +283,7 @@ static inline void reg_pair_from_64(u32 *reg0, u32 *reg1, u64 val) |
| 1347 | /* Registration of the ABIs */ |
| 1348 | int optee_smc_abi_register(void); |
| 1349 | void optee_smc_abi_unregister(void); |
| 1350 | +int optee_ffa_abi_register(void); |
| 1351 | +void optee_ffa_abi_unregister(void); |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1352 | |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1353 | #endif /*OPTEE_PRIVATE_H*/ |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1354 | -- |
Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1355 | 2.34.1 |
Brad Bishop | bec4ebc | 2022-08-03 09:55:16 -0400 | [diff] [blame] | 1356 | |