| From 5665ffd3fb8e94003abc1c0c05c9fa30d4028b67 Mon Sep 17 00:00:00 2001 |
| From: Jens Wiklander <jens.wiklander@linaro.org> |
| Date: Thu, 25 Mar 2021 15:08:53 +0100 |
| Subject: [PATCH 19/22] optee: add FF-A support |
| |
| Adds support for using FF-A [1] as transport to the OP-TEE driver. |
| |
| Introduces struct optee_msg_param_fmem which carries all information |
| needed when OP-TEE is calling FFA_MEM_RETRIEVE_REQ to get the shared |
| memory reference mapped by the hypervisor in S-EL2. Register usage is |
| also updated to include the information needed. |
| |
| The FF-A part of this driver is enabled if CONFIG_ARM_FFA_TRANSPORT is |
| enabled. |
| |
| [1] https://developer.arm.com/documentation/den0077/latest |
| Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> |
| |
| Upstream-Status: Pending [Not submitted to upstream yet] |
| --- |
| drivers/tee/optee/call.c | 212 ++++++++++++- |
| drivers/tee/optee/core.c | 486 +++++++++++++++++++++++++++++- |
| drivers/tee/optee/optee_ffa.h | 153 ++++++++++ |
| drivers/tee/optee/optee_msg.h | 27 +- |
| drivers/tee/optee/optee_private.h | 52 ++++ |
| drivers/tee/optee/rpc.c | 118 ++++++++ |
| 6 files changed, 1040 insertions(+), 8 deletions(-) |
| create mode 100644 drivers/tee/optee/optee_ffa.h |
| |
| diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c |
| index e7b93153252c..cf91a81a242a 100644 |
| --- a/drivers/tee/optee/call.c |
| +++ b/drivers/tee/optee/call.c |
| @@ -3,15 +3,18 @@ |
| * Copyright (c) 2015-2021, Linaro Limited |
| */ |
| #include <linux/arm-smccc.h> |
| +#include <linux/arm_ffa.h> |
| #include <linux/device.h> |
| #include <linux/err.h> |
| #include <linux/errno.h> |
| #include <linux/mm.h> |
| #include <linux/sched.h> |
| +#include <linux/scatterlist.h> |
| #include <linux/slab.h> |
| #include <linux/tee_drv.h> |
| #include <linux/types.h> |
| #include <linux/uaccess.h> |
| +#include "optee_ffa.h" |
| #include "optee_private.h" |
| #include "optee_smc.h" |
| |
| @@ -180,11 +183,21 @@ int optee_do_call_with_arg(struct tee_context *ctx, struct tee_shm *arg) |
| static struct tee_shm *get_msg_arg(struct tee_context *ctx, size_t num_params, |
| struct optee_msg_arg **msg_arg) |
| { |
| + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| + size_t sz = OPTEE_MSG_GET_ARG_SIZE(num_params); |
| struct tee_shm *shm; |
| struct optee_msg_arg *ma; |
| |
| - shm = tee_shm_alloc(ctx, OPTEE_MSG_GET_ARG_SIZE(num_params), |
| - TEE_SHM_MAPPED); |
| + /* |
| + * rpc_arg_count is set to the number of allocated parameters in |
| + * the RPC argument struct if a second MSG arg struct is expected. |
| + * The second arg struct will then be used for RPC. So far only |
| + * enabled when using FF-A as transport layer. |
| + */ |
| + if (optee->rpc_arg_count) |
| + sz += OPTEE_MSG_GET_ARG_SIZE(optee->rpc_arg_count); |
| + |
| + shm = tee_shm_alloc(ctx, sz, TEE_SHM_MAPPED); |
| if (IS_ERR(shm)) |
| return shm; |
| |
| @@ -673,3 +686,198 @@ int optee_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm) |
| { |
| return 0; |
| } |
| + |
| +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| +static int optee_ffa_yielding_call(struct tee_context *ctx, |
| + struct ffa_send_direct_data *data, |
| + struct optee_msg_arg *rpc_arg) |
| +{ |
| + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| + struct ffa_device *ffa_dev = optee->ffa.ffa_dev; |
| + struct optee_call_waiter w; |
| + u32 cmd = data->data0; |
| + u32 w4 = data->data1; |
| + u32 w5 = data->data2; |
| + u32 w6 = data->data3; |
| + int rc; |
| + |
| + /* Initialize waiter */ |
| + optee_cq_wait_init(&optee->call_queue, &w); |
| + while (true) { |
| + rc = ffa_ops->sync_send_receive(ffa_dev, data); |
| + if (rc) |
| + goto done; |
| + |
| + switch ((int)data->data0) { |
| + case TEEC_SUCCESS: |
| + break; |
| + case TEEC_ERROR_BUSY: |
| + if (cmd == OPTEE_FFA_YIELDING_CALL_RESUME) { |
| + rc = -EIO; |
| + goto done; |
| + } |
| + |
| + /* |
| + * Out of threads in secure world, wait for a thread |
| + * become available. |
| + */ |
| + optee_cq_wait_for_completion(&optee->call_queue, &w); |
| + data->data0 = cmd; |
| + data->data1 = w4; |
| + data->data2 = w5; |
| + data->data3 = w6; |
| + continue; |
| + default: |
| + rc = -EIO; |
| + goto done; |
| + } |
| + |
| + if (data->data1 == OPTEE_FFA_YIELDING_CALL_RETURN_DONE) |
| + goto done; |
| + |
| + /* |
| + * OP-TEE has returned with a RPC request. |
| + * |
| + * Note that data->data4 (passed in register w7) is already |
| + * filled in by ffa_ops->sync_send_receive() returning |
| + * above. |
| + */ |
| + cond_resched(); |
| + optee_handle_ffa_rpc(ctx, data->data1, rpc_arg); |
| + cmd = OPTEE_FFA_YIELDING_CALL_RESUME; |
| + data->data0 = cmd; |
| + data->data1 = 0; |
| + data->data2 = 0; |
| + data->data3 = 0; |
| + } |
| +done: |
| + /* |
| + * We're done with our thread in secure world, if there's any |
| + * thread waiters wake up one. |
| + */ |
| + optee_cq_wait_final(&optee->call_queue, &w); |
| + |
| + return rc; |
| +} |
| + |
| +/** |
| + * optee_ffa_do_call_with_arg() - Do a FF-A call to enter OP-TEE in secure world |
| + * @ctx: calling context |
| + * @shm: shared memory holding the message to pass to secure world |
| + * |
| + * Does a FF-A call to OP-TEE in secure world and handles eventual resulting |
| + * Remote Procedure Calls (RPC) from OP-TEE. |
| + * |
| + * Returns return code from FF-A, 0 is OK |
| + */ |
| + |
| +int optee_ffa_do_call_with_arg(struct tee_context *ctx, struct tee_shm *shm) |
| +{ |
| + struct ffa_send_direct_data data = { |
| + .data0 = OPTEE_FFA_YIELDING_CALL_WITH_ARG, |
| + .data1 = (u32)shm->sec_world_id, |
| + .data2 = (u32)(shm->sec_world_id >> 32), |
| + .data3 = shm->offset, |
| + }; |
| + struct optee_msg_arg *arg = tee_shm_get_va(shm, 0); |
| + unsigned int rpc_arg_offs = OPTEE_MSG_GET_ARG_SIZE(arg->num_params); |
| + struct optee_msg_arg *rpc_arg = tee_shm_get_va(shm, rpc_arg_offs); |
| + |
| + return optee_ffa_yielding_call(ctx, &data, rpc_arg); |
| +} |
| + |
| +int optee_ffa_shm_register(struct tee_context *ctx, struct tee_shm *shm, |
| + struct page **pages, size_t num_pages, |
| + unsigned long start) |
| +{ |
| + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| + struct ffa_device *ffa_dev = optee->ffa.ffa_dev; |
| + struct ffa_mem_region_attributes mem_attr = { |
| + .receiver = ffa_dev->vm_id, |
| + .attrs = FFA_MEM_RW, |
| + }; |
| + struct ffa_mem_ops_args args = { |
| + .use_txbuf = true, |
| + .attrs = &mem_attr, |
| + .nattrs = 1, |
| + }; |
| + struct sg_table sgt; |
| + int rc; |
| + |
| + rc = check_mem_type(start, num_pages); |
| + if (rc) |
| + return rc; |
| + |
| + rc = sg_alloc_table_from_pages(&sgt, pages, num_pages, 0, |
| + num_pages * PAGE_SIZE, GFP_KERNEL); |
| + if (rc) |
| + return rc; |
| + args.sg = sgt.sgl; |
| + rc = ffa_ops->memory_share(ffa_dev, &args); |
| + sg_free_table(&sgt); |
| + if (rc) |
| + return rc; |
| + |
| + rc = optee_shm_add_ffa_handle(optee, shm, args.g_handle); |
| + if (rc) { |
| + ffa_ops->memory_reclaim(args.g_handle, 0); |
| + return rc; |
| + } |
| + |
| + shm->sec_world_id = args.g_handle; |
| + |
| + return 0; |
| +} |
| + |
| +int optee_ffa_shm_unregister(struct tee_context *ctx, struct tee_shm *shm) |
| +{ |
| + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| + struct ffa_device *ffa_dev = optee->ffa.ffa_dev; |
| + u64 global_handle = shm->sec_world_id; |
| + struct ffa_send_direct_data data = { |
| + .data0 = OPTEE_FFA_UNREGISTER_SHM, |
| + .data1 = (u32)global_handle, |
| + .data2 = (u32)(global_handle >> 32) |
| + }; |
| + int rc; |
| + |
| + optee_shm_rem_ffa_handle(optee, global_handle); |
| + shm->sec_world_id = 0; |
| + |
| + rc = ffa_ops->sync_send_receive(ffa_dev, &data); |
| + if (rc) |
| + pr_err("Unregister SHM id 0x%llx rc %d\n", global_handle, rc); |
| + |
| + rc = ffa_ops->memory_reclaim(global_handle, 0); |
| + if (rc) |
| + pr_err("mem_reclain: 0x%llx %d", global_handle, rc); |
| + |
| + return rc; |
| +} |
| + |
| +int optee_ffa_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm) |
| +{ |
| + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| + const struct ffa_dev_ops *ffa_ops = optee->ffa.ffa_ops; |
| + u64 global_handle = shm->sec_world_id; |
| + int rc; |
| + |
| + /* |
| + * We're skipping the OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM call |
| + * since this is OP-TEE freeing via RPC so it has already retired |
| + * this ID. |
| + */ |
| + |
| + optee_shm_rem_ffa_handle(optee, global_handle); |
| + rc = ffa_ops->memory_reclaim(global_handle, 0); |
| + if (rc) |
| + pr_err("mem_reclain: 0x%llx %d", global_handle, rc); |
| + |
| + shm->sec_world_id = 0; |
| + |
| + return rc; |
| +} |
| +#endif /*CONFIG_ARM_FFA_TRANSPORT*/ |
| diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c |
| index ab602bb8e14a..b9719c60dc48 100644 |
| --- a/drivers/tee/optee/core.c |
| +++ b/drivers/tee/optee/core.c |
| @@ -6,6 +6,7 @@ |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/arm-smccc.h> |
| +#include <linux/arm_ffa.h> |
| #include <linux/errno.h> |
| #include <linux/io.h> |
| #include <linux/module.h> |
| @@ -20,6 +21,7 @@ |
| #include <linux/workqueue.h> |
| #include "optee_private.h" |
| #include "optee_smc.h" |
| +#include "optee_ffa.h" |
| #include "shm_pool.h" |
| |
| #define DRIVER_NAME "optee" |
| @@ -299,10 +301,9 @@ static int optee_open(struct tee_context *ctx) |
| mutex_init(&ctxdata->mutex); |
| INIT_LIST_HEAD(&ctxdata->sess_list); |
| |
| - if (optee->sec_caps & OPTEE_SMC_SEC_CAP_MEMREF_NULL) |
| - ctx->cap_memref_null = true; |
| - else |
| - ctx->cap_memref_null = false; |
| + ctx->cap_memref_null = optee_is_ffa_based(optee) || |
| + (optee->sec_caps & |
| + OPTEE_SMC_SEC_CAP_MEMREF_NULL); |
| |
| ctx->data = ctxdata; |
| return 0; |
| @@ -567,6 +568,472 @@ optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm) |
| return rc; |
| } |
| |
| +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| +static void optee_ffa_get_version(struct tee_device *teedev, |
| + struct tee_ioctl_version_data *vers) |
| +{ |
| + struct tee_ioctl_version_data v = { |
| + .impl_id = TEE_IMPL_ID_OPTEE, |
| + .impl_caps = TEE_OPTEE_CAP_TZ, |
| + .gen_caps = TEE_GEN_CAP_GP | TEE_GEN_CAP_REG_MEM | |
| + TEE_GEN_CAP_MEMREF_NULL, |
| + }; |
| + |
| + *vers = v; |
| +} |
| + |
| +struct shm_rhash { |
| + struct tee_shm *shm; |
| + u64 global_id; |
| + struct rhash_head linkage; |
| +}; |
| + |
| +static void rh_free_fn(void *ptr, void *arg) |
| +{ |
| + kfree(ptr); |
| +} |
| + |
| +static const struct rhashtable_params shm_rhash_params = { |
| + .head_offset = offsetof(struct shm_rhash, linkage), |
| + .key_len = sizeof(u64), |
| + .key_offset = offsetof(struct shm_rhash, global_id), |
| + .automatic_shrinking = true, |
| +}; |
| + |
| +struct tee_shm *optee_shm_from_ffa_handle(struct optee *optee, u64 global_id) |
| +{ |
| + struct tee_shm *shm = NULL; |
| + struct shm_rhash *r; |
| + |
| + mutex_lock(&optee->ffa.mutex); |
| + r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id, |
| + shm_rhash_params); |
| + if (r) |
| + shm = r->shm; |
| + mutex_unlock(&optee->ffa.mutex); |
| + |
| + return shm; |
| +} |
| + |
| +int optee_shm_add_ffa_handle(struct optee *optee, struct tee_shm *shm, |
| + u64 global_id) |
| +{ |
| + struct shm_rhash *r; |
| + int rc; |
| + |
| + r = kmalloc(sizeof(*r), GFP_KERNEL); |
| + if (!r) |
| + return -ENOMEM; |
| + r->shm = shm; |
| + r->global_id = global_id; |
| + |
| + mutex_lock(&optee->ffa.mutex); |
| + rc = rhashtable_lookup_insert_fast(&optee->ffa.global_ids, &r->linkage, |
| + shm_rhash_params); |
| + mutex_unlock(&optee->ffa.mutex); |
| + |
| + if (rc) |
| + kfree(r); |
| + |
| + return rc; |
| +} |
| + |
| +int optee_shm_rem_ffa_handle(struct optee *optee, u64 global_id) |
| +{ |
| + struct shm_rhash *r; |
| + int rc = -ENOENT; |
| + |
| + mutex_lock(&optee->ffa.mutex); |
| + r = rhashtable_lookup_fast(&optee->ffa.global_ids, &global_id, |
| + shm_rhash_params); |
| + if (r) |
| + rc = rhashtable_remove_fast(&optee->ffa.global_ids, |
| + &r->linkage, shm_rhash_params); |
| + mutex_unlock(&optee->ffa.mutex); |
| + |
| + if (!rc) |
| + kfree(r); |
| + |
| + return rc; |
| +} |
| + |
| +static void from_msg_param_ffa_mem(struct optee *optee, struct tee_param *p, |
| + u32 attr, const struct optee_msg_param *mp) |
| +{ |
| + struct tee_shm *shm = NULL; |
| + u64 offs_high = 0; |
| + u64 offs_low = 0; |
| + |
| + p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT + |
| + attr - OPTEE_MSG_ATTR_TYPE_FMEM_INPUT; |
| + p->u.memref.size = mp->u.fmem.size; |
| + |
| + if (mp->u.fmem.global_id != OPTEE_MSG_FMEM_INVALID_GLOBAL_ID) |
| + shm = optee_shm_from_ffa_handle(optee, mp->u.fmem.global_id); |
| + p->u.memref.shm = shm; |
| + |
| + if (shm) { |
| + offs_low = mp->u.fmem.offs_low; |
| + offs_high = mp->u.fmem.offs_high; |
| + } |
| + p->u.memref.shm_offs = offs_low | offs_high << 32; |
| +} |
| + |
| +/** |
| + * optee_ffa_from_msg_param() - convert from OPTEE_MSG parameters to |
| + * struct tee_param |
| + * @optee: main service struct |
| + * @params: subsystem internal parameter representation |
| + * @num_params: number of elements in the parameter arrays |
| + * @msg_params: OPTEE_MSG parameters |
| + * |
| + * Returns 0 on success or <0 on failure |
| + */ |
| +static int optee_ffa_from_msg_param(struct optee *optee, |
| + struct tee_param *params, size_t num_params, |
| + const struct optee_msg_param *msg_params) |
| +{ |
| + size_t n; |
| + |
| + for (n = 0; n < num_params; n++) { |
| + struct tee_param *p = params + n; |
| + const struct optee_msg_param *mp = msg_params + n; |
| + u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK; |
| + |
| + switch (attr) { |
| + case OPTEE_MSG_ATTR_TYPE_NONE: |
| + p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE; |
| + memset(&p->u, 0, sizeof(p->u)); |
| + break; |
| + case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT: |
| + case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT: |
| + case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT: |
| + from_msg_param_value(p, attr, mp); |
| + break; |
| + case OPTEE_MSG_ATTR_TYPE_FMEM_INPUT: |
| + case OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT: |
| + case OPTEE_MSG_ATTR_TYPE_FMEM_INOUT: |
| + from_msg_param_ffa_mem(optee, p, attr, mp); |
| + break; |
| + default: |
| + return -EINVAL; |
| + } |
| + } |
| + |
| + return 0; |
| +} |
| + |
| +static int to_msg_param_ffa_mem(struct optee_msg_param *mp, |
| + const struct tee_param *p) |
| +{ |
| + struct tee_shm *shm = p->u.memref.shm; |
| + |
| + mp->attr = OPTEE_MSG_ATTR_TYPE_FMEM_INPUT + p->attr - |
| + TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT; |
| + |
| + if (shm) { |
| + u64 shm_offs = p->u.memref.shm_offs; |
| + |
| + mp->u.fmem.internal_offs = shm->offset; |
| + |
| + mp->u.fmem.offs_low = shm_offs; |
| + mp->u.fmem.offs_high = shm_offs >> 32; |
| + /* Check that the entire offset could be stored. */ |
| + if (mp->u.fmem.offs_high != shm_offs >> 32) |
| + return -EINVAL; |
| + |
| + mp->u.fmem.global_id = shm->sec_world_id; |
| + } else { |
| + memset(&mp->u, 0, sizeof(mp->u)); |
| + mp->u.fmem.global_id = OPTEE_MSG_FMEM_INVALID_GLOBAL_ID; |
| + } |
| + mp->u.fmem.size = p->u.memref.size; |
| + |
| + return 0; |
| +} |
| + |
| +/** |
| + * optee_ffa_to_msg_param() - convert from struct tee_params to OPTEE_MSG |
| + * parameters |
| + * @optee: main service struct |
| + * @msg_params: OPTEE_MSG parameters |
| + * @num_params: number of elements in the parameter arrays |
| + * @params: subsystem itnernal parameter representation |
| + * Returns 0 on success or <0 on failure |
| + */ |
| +static int optee_ffa_to_msg_param(struct optee *optee, |
| + struct optee_msg_param *msg_params, |
| + size_t num_params, |
| + const struct tee_param *params) |
| +{ |
| + size_t n; |
| + |
| + for (n = 0; n < num_params; n++) { |
| + const struct tee_param *p = params + n; |
| + struct optee_msg_param *mp = msg_params + n; |
| + |
| + switch (p->attr) { |
| + case TEE_IOCTL_PARAM_ATTR_TYPE_NONE: |
| + mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE; |
| + memset(&mp->u, 0, sizeof(mp->u)); |
| + break; |
| + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT: |
| + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: |
| + case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: |
| + to_msg_param_value(mp, p); |
| + break; |
| + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT: |
| + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT: |
| + case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT: |
| + if (to_msg_param_ffa_mem(mp, p)) |
| + return -EINVAL; |
| + break; |
| + default: |
| + return -EINVAL; |
| + } |
| + } |
| + |
| + return 0; |
| +} |
| + |
| +static bool optee_ffa_api_is_compatbile(struct ffa_device *ffa_dev, |
| + const struct ffa_dev_ops *ops) |
| +{ |
| + struct ffa_send_direct_data data = { OPTEE_FFA_GET_API_VERSION }; |
| + int rc; |
| + |
| + ops->mode_32bit_set(ffa_dev); |
| + |
| + rc = ops->sync_send_receive(ffa_dev, &data); |
| + if (rc) { |
| + pr_err("Unexpected error %d\n", rc); |
| + return false; |
| + } |
| + if (data.data0 != OPTEE_FFA_VERSION_MAJOR || |
| + data.data1 < OPTEE_FFA_VERSION_MINOR) { |
| + pr_err("Incompatible OP-TEE API version %lu.%lu", |
| + data.data0, data.data1); |
| + return false; |
| + } |
| + |
| + data = (struct ffa_send_direct_data){ OPTEE_FFA_GET_OS_VERSION }; |
| + rc = ops->sync_send_receive(ffa_dev, &data); |
| + if (rc) { |
| + pr_err("Unexpected error %d\n", rc); |
| + return false; |
| + } |
| + if (data.data2) |
| + pr_info("revision %lu.%lu (%08lx)", |
| + data.data0, data.data1, data.data2); |
| + else |
| + pr_info("revision %lu.%lu", data.data0, data.data1); |
| + |
| + return true; |
| +} |
| + |
| +static bool optee_ffa_exchange_caps(struct ffa_device *ffa_dev, |
| + const struct ffa_dev_ops *ops, |
| + u32 *sec_caps, unsigned int *rpc_arg_count) |
| +{ |
| + struct ffa_send_direct_data data = { OPTEE_FFA_EXCHANGE_CAPABILITIES }; |
| + int rc; |
| + |
| + rc = ops->sync_send_receive(ffa_dev, &data); |
| + if (rc) { |
| + pr_err("Unexpected error %d", rc); |
| + return false; |
| + } |
| + if (data.data0) { |
| + pr_err("Unexpected exchange error %lu", data.data0); |
| + return false; |
| + } |
| + |
| + *sec_caps = 0; |
| + *rpc_arg_count = (u8)data.data1; |
| + |
| + return true; |
| +} |
| + |
| +static struct tee_shm_pool *optee_ffa_config_dyn_shm(void) |
| +{ |
| + struct tee_shm_pool_mgr *priv_mgr; |
| + struct tee_shm_pool_mgr *dmabuf_mgr; |
| + void *rc; |
| + |
| + rc = optee_ffa_shm_pool_alloc_pages(); |
| + if (IS_ERR(rc)) |
| + return rc; |
| + priv_mgr = rc; |
| + |
| + rc = optee_ffa_shm_pool_alloc_pages(); |
| + if (IS_ERR(rc)) { |
| + tee_shm_pool_mgr_destroy(priv_mgr); |
| + return rc; |
| + } |
| + dmabuf_mgr = rc; |
| + |
| + rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr); |
| + if (IS_ERR(rc)) { |
| + tee_shm_pool_mgr_destroy(priv_mgr); |
| + tee_shm_pool_mgr_destroy(dmabuf_mgr); |
| + } |
| + |
| + return rc; |
| +} |
| + |
| +static const struct tee_driver_ops optee_ffa_clnt_ops = { |
| + .get_version = optee_ffa_get_version, |
| + .open = optee_open, |
| + .release = optee_release, |
| + .open_session = optee_open_session, |
| + .close_session = optee_close_session, |
| + .invoke_func = optee_invoke_func, |
| + .cancel_req = optee_cancel_req, |
| + .shm_register = optee_ffa_shm_register, |
| + .shm_unregister = optee_ffa_shm_unregister, |
| +}; |
| + |
| +static const struct tee_desc optee_ffa_clnt_desc = { |
| + .name = DRIVER_NAME "ffa-clnt", |
| + .ops = &optee_ffa_clnt_ops, |
| + .owner = THIS_MODULE, |
| +}; |
| + |
| +static const struct tee_driver_ops optee_ffa_supp_ops = { |
| + .get_version = optee_ffa_get_version, |
| + .open = optee_open, |
| + .release = optee_release_supp, |
| + .supp_recv = optee_supp_recv, |
| + .supp_send = optee_supp_send, |
| + .shm_register = optee_ffa_shm_register, /* same as for clnt ops */ |
| + .shm_unregister = optee_ffa_shm_unregister_supp, |
| +}; |
| + |
| +static const struct tee_desc optee_ffa_supp_desc = { |
| + .name = DRIVER_NAME "ffa-supp", |
| + .ops = &optee_ffa_supp_ops, |
| + .owner = THIS_MODULE, |
| + .flags = TEE_DESC_PRIVILEGED, |
| +}; |
| + |
| +static const struct optee_ops optee_ffa_ops = { |
| + .do_call_with_arg = optee_ffa_do_call_with_arg, |
| + .to_msg_param = optee_ffa_to_msg_param, |
| + .from_msg_param = optee_ffa_from_msg_param, |
| +}; |
| + |
| +static void optee_ffa_remove(struct ffa_device *ffa_dev) |
| +{ |
| + (void)ffa_dev; |
| +} |
| + |
| +static int optee_ffa_probe(struct ffa_device *ffa_dev) |
| +{ |
| + const struct ffa_dev_ops *ffa_ops; |
| + unsigned int rpc_arg_count; |
| + struct tee_device *teedev; |
| + struct optee *optee; |
| + u32 sec_caps; |
| + int rc; |
| + |
| + ffa_ops = ffa_dev_ops_get(ffa_dev); |
| + if (!ffa_ops) { |
| + pr_warn("failed \"method\" init: ffa\n"); |
| + return -ENOENT; |
| + } |
| + |
| + if (!optee_ffa_api_is_compatbile(ffa_dev, ffa_ops)) |
| + return -EINVAL; |
| + |
| + if (!optee_ffa_exchange_caps(ffa_dev, ffa_ops, &sec_caps, |
| + &rpc_arg_count)) |
| + return -EINVAL; |
| + |
| + optee = kzalloc(sizeof(*optee), GFP_KERNEL); |
| + if (!optee) { |
| + rc = -ENOMEM; |
| + goto err; |
| + } |
| + optee->pool = optee_ffa_config_dyn_shm(); |
| + if (IS_ERR(optee->pool)) { |
| + rc = PTR_ERR(optee->pool); |
| + optee->pool = NULL; |
| + goto err; |
| + } |
| + |
| + optee->ops = &optee_ffa_ops; |
| + optee->ffa.ffa_dev = ffa_dev; |
| + optee->ffa.ffa_ops = ffa_ops; |
| + optee->sec_caps = sec_caps; |
| + optee->rpc_arg_count = rpc_arg_count; |
| + |
| + teedev = tee_device_alloc(&optee_ffa_clnt_desc, NULL, optee->pool, |
| + optee); |
| + if (IS_ERR(teedev)) { |
| + rc = PTR_ERR(teedev); |
| + goto err; |
| + } |
| + optee->teedev = teedev; |
| + |
| + teedev = tee_device_alloc(&optee_ffa_supp_desc, NULL, optee->pool, |
| + optee); |
| + if (IS_ERR(teedev)) { |
| + rc = PTR_ERR(teedev); |
| + goto err; |
| + } |
| + optee->supp_teedev = teedev; |
| + |
| + rc = tee_device_register(optee->teedev); |
| + if (rc) |
| + goto err; |
| + |
| + rc = tee_device_register(optee->supp_teedev); |
| + if (rc) |
| + goto err; |
| + |
| + rc = rhashtable_init(&optee->ffa.global_ids, &shm_rhash_params); |
| + if (rc) |
| + goto err; |
| + mutex_init(&optee->ffa.mutex); |
| + mutex_init(&optee->call_queue.mutex); |
| + INIT_LIST_HEAD(&optee->call_queue.waiters); |
| + optee_wait_queue_init(&optee->wait_queue); |
| + optee_supp_init(&optee->supp); |
| + ffa_dev_set_drvdata(ffa_dev, optee); |
| + |
| + pr_info("initialized driver\n"); |
| + return 0; |
| +err: |
| + /* |
| + * tee_device_unregister() is safe to call even if the |
| + * devices hasn't been registered with |
| + * tee_device_register() yet. |
| + */ |
| + tee_device_unregister(optee->supp_teedev); |
| + tee_device_unregister(optee->teedev); |
| + if (optee->pool) |
| + tee_shm_pool_free(optee->pool); |
| + kfree(optee); |
| + return rc; |
| +} |
| + |
| +static const struct ffa_device_id optee_ffa_device_id[] = { |
| + /* 486178e0-e7f8-11e3-bc5e0002a5d5c51b */ |
| + { UUID_INIT(0x486178e0, 0xe7f8, 0x11e3, |
| + 0xbc, 0x5e, 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b) }, |
| + {} |
| +}; |
| + |
| +static struct ffa_driver optee_ffa_driver = { |
| + .name = "optee", |
| + .probe = optee_ffa_probe, |
| + .remove = optee_ffa_remove, |
| + .id_table = optee_ffa_device_id, |
| +}; |
| + |
| +module_ffa_driver(optee_ffa_driver); |
| +#endif /*CONFIG_ARM_FFA_TRANSPORT*/ |
| + |
| /* Simple wrapper functions to be able to use a function pointer */ |
| static void optee_smccc_smc(unsigned long a0, unsigned long a1, |
| unsigned long a2, unsigned long a3, |
| @@ -615,7 +1082,8 @@ static int optee_remove(struct platform_device *pdev) |
| * reference counters and also avoid wild pointers in secure world |
| * into the old shared memory range. |
| */ |
| - optee_disable_shm_cache(optee); |
| + if (!optee_is_ffa_based(optee)) |
| + optee_disable_shm_cache(optee); |
| |
| /* |
| * The two devices have to be unregistered before we can free the |
| @@ -631,6 +1099,14 @@ static int optee_remove(struct platform_device *pdev) |
| optee_supp_uninit(&optee->supp); |
| mutex_destroy(&optee->call_queue.mutex); |
| |
| +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| + if (optee->ffa.ffa_ops) { |
| + mutex_destroy(&optee->ffa.mutex); |
| + rhashtable_free_and_destroy(&optee->ffa.global_ids, |
| + rh_free_fn, NULL); |
| + } |
| +#endif /*CONFIG_ARM_FFA_TRANSPORT*/ |
| + |
| kfree(optee); |
| |
| return 0; |
| diff --git a/drivers/tee/optee/optee_ffa.h b/drivers/tee/optee/optee_ffa.h |
| new file mode 100644 |
| index 000000000000..ee3a03fc392c |
| --- /dev/null |
| +++ b/drivers/tee/optee/optee_ffa.h |
| @@ -0,0 +1,153 @@ |
| +/* SPDX-License-Identifier: BSD-2-Clause */ |
| +/* |
| + * Copyright (c) 2019-2021, Linaro Limited |
| + */ |
| + |
| +/* |
| + * This file is exported by OP-TEE and is kept in sync between secure world |
| + * and normal world drivers. We're using ARM FF-A 1.0 specification. |
| + */ |
| + |
| +#ifndef __OPTEE_FFA_H |
| +#define __OPTEE_FFA_H |
| + |
| +#include <linux/arm_ffa.h> |
| + |
| +/* |
| + * Normal world sends requests with FFA_MSG_SEND_DIRECT_REQ and |
| + * responses are returned with FFA_MSG_SEND_DIRECT_RESP for normal |
| + * messages. |
| + * |
| + * All requests with FFA_MSG_SEND_DIRECT_REQ and FFA_MSG_SEND_DIRECT_RESP |
| + * are using the AArch32 SMC calling convention with register usage as |
| + * defined in FF-A specification: |
| + * w0: Function ID (0x8400006F or 0x84000070) |
| + * w1: Source/Destination IDs |
| + * w2: Reserved (MBZ) |
| + * w3-w7: Implementation defined, free to be used below |
| + */ |
| + |
| +#define OPTEE_FFA_VERSION_MAJOR 1 |
| +#define OPTEE_FFA_VERSION_MINOR 0 |
| + |
| +#define OPTEE_FFA_BLOCKING_CALL(id) (id) |
| +#define OPTEE_FFA_YIELDING_CALL_BIT 31 |
| +#define OPTEE_FFA_YIELDING_CALL(id) ((id) | BIT(OPTEE_FFA_YIELDING_CALL_BIT)) |
| + |
| +/* |
| + * Returns the API version implemented, currently follows the FF-A version. |
| + * Call register usage: |
| + * w3: Service ID, OPTEE_FFA_GET_API_VERSION |
| + * w4-w7: Not used (MBZ) |
| + * |
| + * Return register usage: |
| + * w3: OPTEE_FFA_VERSION_MAJOR |
| + * w4: OPTEE_FFA_VERSION_MINOR |
| + * w5-w7: Not used (MBZ) |
| + */ |
| +#define OPTEE_FFA_GET_API_VERSION OPTEE_FFA_BLOCKING_CALL(0) |
| + |
| +/* |
| + * Returns the revision of OP-TEE. |
| + * |
| + * Used by non-secure world to figure out which version of the Trusted OS |
| + * is installed. Note that the returned revision is the revision of the |
| + * Trusted OS, not of the API. |
| + * |
| + * Call register usage: |
| + * w3: Service ID, OPTEE_FFA_GET_OS_VERSION |
| + * w4-w7: Unused (MBZ) |
| + * |
| + * Return register usage: |
| + * w3: CFG_OPTEE_REVISION_MAJOR |
| + * w4: CFG_OPTEE_REVISION_MINOR |
| + * w5: TEE_IMPL_GIT_SHA1 (or zero if not supported) |
| + */ |
| +#define OPTEE_FFA_GET_OS_VERSION OPTEE_FFA_BLOCKING_CALL(1) |
| + |
| +/* |
| + * Exchange capabilities between normal world and secure world. |
| + * |
| + * Currently there are no defined capabilities. When features are added new |
| + * capabilities may be added. |
| + * |
| + * Call register usage: |
| + * w3: Service ID, OPTEE_FFA_EXCHANGE_CAPABILITIES |
| + * w4-w7: Note used (MBZ) |
| + * |
| + * Return register usage: |
| + * w3: Error code, 0 on success |
| + * w4: Bit[7:0]: Number of parameters needed for RPC to be supplied |
| + * as the second MSG arg struct for |
| + * OPTEE_FFA_YIELDING_CALL_WITH_ARG. |
| + * Bit[31:8]: Reserved (MBZ) |
| + * w5-w7: Note used (MBZ) |
| + */ |
| +#define OPTEE_FFA_EXCHANGE_CAPABILITIES OPTEE_FFA_BLOCKING_CALL(2) |
| + |
| +/* |
| + * Unregister shared memory |
| + * |
| + * Call register usage: |
| + * w3: Service ID, OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM |
| + * w4: Shared memory handle, lower bits |
| + * w5: Shared memory handle, higher bits |
| + * w6-w7: Not used (MBZ) |
| + * |
| + * Return register usage: |
| + * w3: Error code, 0 on success |
| + * w4-w7: Note used (MBZ) |
| + */ |
| +#define OPTEE_FFA_UNREGISTER_SHM OPTEE_FFA_BLOCKING_CALL(3) |
| + |
| +/* |
| + * Call with struct optee_msg_arg as argument in the supplied shared memory |
| + * with a zero internal offset and normal cached memory attributes. |
| + * Register usage: |
| + * w3: Service ID, OPTEE_FFA_YIELDING_CALL_WITH_ARG |
| + * w4: Lower 32 bits of a 64-bit Shared memory handle |
| + * w5: Upper 32 bits of a 64-bit Shared memory handle |
| + * w6: Offset into shared memory pointing to a struct optee_msg_arg |
| + * right after the parameters of this struct (at offset |
| + * OPTEE_MSG_GET_ARG_SIZE(num_params) follows a struct optee_msg_arg |
| + * for RPC, this struct has reserved space for the number of RPC |
| + * parameters as returned by OPTEE_FFA_EXCHANGE_CAPABILITIES. |
| + * w7: Not used (MBZ) |
| + * Resume from RPC. Register usage: |
| + * w3: Service ID, OPTEE_FFA_YIELDING_CALL_RESUME |
| + * w4-w6: Not used (MBZ) |
| + * w7: Resume info |
| + * |
| + * Normal return (yielding call is completed). Register usage: |
| + * w3: Error code, 0 on success |
| + * w4: OPTEE_FFA_YIELDING_CALL_RETURN_DONE |
| + * w5-w7: Not used (MBZ) |
| + * |
| + * RPC interrupt return (RPC from secure world). Register usage: |
| + * w3: Error code == 0 |
| + * w4: Any defined RPC code but OPTEE_FFA_YIELDING_CALL_RETURN_DONE |
| + * w5-w6: Not used (MBZ) |
| + * w7: Resume info |
| + * |
| + * Possible error codes in register w3: |
| + * 0: Success |
| + * FFA_DENIED: w4 isn't one of OPTEE_FFA_YIELDING_CALL_START |
| + * OPTEE_FFA_YIELDING_CALL_RESUME |
| + * |
| + * Possible error codes for OPTEE_FFA_YIELDING_CALL_START, |
| + * FFA_BUSY: Number of OP-TEE OS threads exceeded, |
| + * try again later |
| + * FFA_DENIED: RPC shared memory object not found |
| + * FFA_INVALID_PARAMETER: Bad shared memory handle or offset into the memory |
| + * |
| + * Possible error codes for OPTEE_FFA_YIELDING_CALL_RESUME |
| + * FFA_INVALID_PARAMETER: Bad resume info |
| + */ |
| +#define OPTEE_FFA_YIELDING_CALL_WITH_ARG OPTEE_FFA_YIELDING_CALL(0) |
| +#define OPTEE_FFA_YIELDING_CALL_RESUME OPTEE_FFA_YIELDING_CALL(1) |
| + |
| +#define OPTEE_FFA_YIELDING_CALL_RETURN_DONE 0 |
| +#define OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD 1 |
| +#define OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT 2 |
| + |
| +#endif /*__OPTEE_FFA_H*/ |
| diff --git a/drivers/tee/optee/optee_msg.h b/drivers/tee/optee/optee_msg.h |
| index 5bef6a0165db..1ee943980c68 100644 |
| --- a/drivers/tee/optee/optee_msg.h |
| +++ b/drivers/tee/optee/optee_msg.h |
| @@ -28,6 +28,9 @@ |
| #define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 0x5 |
| #define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT 0x6 |
| #define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT 0x7 |
| +#define OPTEE_MSG_ATTR_TYPE_FMEM_INPUT OPTEE_MSG_ATTR_TYPE_RMEM_INPUT |
| +#define OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT |
| +#define OPTEE_MSG_ATTR_TYPE_FMEM_INOUT OPTEE_MSG_ATTR_TYPE_RMEM_INOUT |
| #define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT 0x9 |
| #define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT 0xa |
| #define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT 0xb |
| @@ -96,6 +99,8 @@ |
| */ |
| #define OPTEE_MSG_NONCONTIG_PAGE_SIZE 4096 |
| |
| +#define OPTEE_MSG_FMEM_INVALID_GLOBAL_ID 0xffffffffffffffff |
| + |
| /** |
| * struct optee_msg_param_tmem - temporary memory reference parameter |
| * @buf_ptr: Address of the buffer |
| @@ -127,6 +132,23 @@ struct optee_msg_param_rmem { |
| u64 shm_ref; |
| }; |
| |
| +/** |
| + * struct optee_msg_param_fmem - ffa memory reference parameter |
| + * @offs_lower: Lower bits of offset into shared memory reference |
| + * @offs_upper: Upper bits of offset into shared memory reference |
| + * @internal_offs: Internal offset into the first page of shared memory |
| + * reference |
| + * @size: Size of the buffer |
| + * @global_id: Global identifier of Shared memory |
| + */ |
| +struct optee_msg_param_fmem { |
| + u32 offs_low; |
| + u16 offs_high; |
| + u16 internal_offs; |
| + u64 size; |
| + u64 global_id; |
| +}; |
| + |
| /** |
| * struct optee_msg_param_value - opaque value parameter |
| * |
| @@ -143,13 +165,15 @@ struct optee_msg_param_value { |
| * @attr: attributes |
| * @tmem: parameter by temporary memory reference |
| * @rmem: parameter by registered memory reference |
| + * @fmem: parameter by ffa registered memory reference |
| * @value: parameter by opaque value |
| * @octets: parameter by octet string |
| * |
| * @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in |
| * the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value or octets, |
| * OPTEE_MSG_ATTR_TYPE_TMEM_* indicates @tmem and |
| - * OPTEE_MSG_ATTR_TYPE_RMEM_* indicates @rmem, |
| + * OPTEE_MSG_ATTR_TYPE_RMEM_* or the alias PTEE_MSG_ATTR_TYPE_FMEM_* indicates |
| + * @rmem or @fmem depending on the conduit. |
| * OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used. |
| */ |
| struct optee_msg_param { |
| @@ -157,6 +181,7 @@ struct optee_msg_param { |
| union { |
| struct optee_msg_param_tmem tmem; |
| struct optee_msg_param_rmem rmem; |
| + struct optee_msg_param_fmem fmem; |
| struct optee_msg_param_value value; |
| u8 octets[24]; |
| } u; |
| diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h |
| index c5741e96e967..1ffe74e66d15 100644 |
| --- a/drivers/tee/optee/optee_private.h |
| +++ b/drivers/tee/optee/optee_private.h |
| @@ -7,6 +7,7 @@ |
| #define OPTEE_PRIVATE_H |
| |
| #include <linux/arm-smccc.h> |
| +#include <linux/rhashtable.h> |
| #include <linux/semaphore.h> |
| #include <linux/tee_drv.h> |
| #include <linux/types.h> |
| @@ -20,6 +21,7 @@ |
| #define TEEC_ERROR_NOT_SUPPORTED 0xFFFF000A |
| #define TEEC_ERROR_COMMUNICATION 0xFFFF000E |
| #define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C |
| +#define TEEC_ERROR_BUSY 0xFFFF000D |
| #define TEEC_ERROR_SHORT_BUFFER 0xFFFF0010 |
| |
| #define TEEC_ORIGIN_COMMS 0x00000002 |
| @@ -66,6 +68,22 @@ struct optee_supp { |
| struct completion reqs_c; |
| }; |
| |
| +/** |
| + * struct optee_ffa_data - FFA communication struct |
| + * @ffa_dev FFA device, contains the destination id, the id of |
| + * OP-TEE in secure world |
| + * @ffa_ops FFA operations |
| + * @mutex Serializes access to @global_ids |
| + * @global_ids FF-A shared memory global handle translation |
| + */ |
| +struct optee_ffa { |
| + struct ffa_device *ffa_dev; |
| + const struct ffa_dev_ops *ffa_ops; |
| + /* Serializes access to @global_ids */ |
| + struct mutex mutex; |
| + struct rhashtable global_ids; |
| +}; |
| + |
| struct optee; |
| |
| /** |
| @@ -113,11 +131,15 @@ struct optee { |
| struct tee_device *teedev; |
| const struct optee_ops *ops; |
| optee_invoke_fn *invoke_fn; |
| +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| + struct optee_ffa ffa; |
| +#endif |
| struct optee_call_queue call_queue; |
| struct optee_wait_queue wait_queue; |
| struct optee_supp supp; |
| struct tee_shm_pool *pool; |
| void *memremaped_shm; |
| + unsigned int rpc_arg_count; |
| u32 sec_caps; |
| bool scan_bus_done; |
| struct workqueue_struct *scan_bus_wq; |
| @@ -206,6 +228,36 @@ void optee_fill_pages_list(u64 *dst, struct page **pages, int num_pages, |
| #define PTA_CMD_GET_DEVICES_SUPP 0x1 |
| int optee_enumerate_devices(u32 func); |
| |
| +int optee_shm_add_ffa_handle(struct optee *optee, struct tee_shm *shm, |
| + u64 global_id); |
| +int optee_shm_rem_ffa_handle(struct optee *optee, u64 global_id); |
| + |
| +struct tee_shm *optee_shm_from_ffa_handle(struct optee *optee, u64 global_id); |
| + |
| +int optee_ffa_shm_register(struct tee_context *ctx, struct tee_shm *shm, |
| + struct page **pages, size_t num_pages, |
| + unsigned long start); |
| +int optee_ffa_shm_unregister(struct tee_context *ctx, struct tee_shm *shm); |
| +int optee_ffa_shm_register_supp(struct tee_context *ctx, struct tee_shm *shm, |
| + struct page **pages, size_t num_pages, |
| + unsigned long start); |
| +int optee_ffa_shm_unregister_supp(struct tee_context *ctx, |
| + struct tee_shm *shm); |
| + |
| +int optee_ffa_do_call_with_arg(struct tee_context *ctx, struct tee_shm *arg); |
| +int optee_ffa_rpc_shm_register(struct tee_context *ctx, struct tee_shm *shm); |
| +void optee_handle_ffa_rpc(struct tee_context *ctx, u32 cmd, |
| + struct optee_msg_arg *arg); |
| + |
| +static inline bool optee_is_ffa_based(struct optee *optee) |
| +{ |
| +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| + return optee->ffa.ffa_ops; |
| +#else |
| + return false; |
| +#endif |
| +} |
| + |
| /* |
| * Small helpers |
| */ |
| diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c |
| index 39562fb6841e..865a9ab3cf65 100644 |
| --- a/drivers/tee/optee/rpc.c |
| +++ b/drivers/tee/optee/rpc.c |
| @@ -10,6 +10,7 @@ |
| #include <linux/i2c.h> |
| #include <linux/slab.h> |
| #include <linux/tee_drv.h> |
| +#include "optee_ffa.h" |
| #include "optee_private.h" |
| #include "optee_smc.h" |
| #include "optee_rpc_cmd.h" |
| @@ -543,3 +544,120 @@ void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param, |
| |
| param->a0 = OPTEE_SMC_CALL_RETURN_FROM_RPC; |
| } |
| + |
| +#ifdef CONFIG_ARM_FFA_TRANSPORT |
| +static void handle_ffa_rpc_func_cmd_shm_alloc(struct tee_context *ctx, |
| + struct optee_msg_arg *arg) |
| +{ |
| + struct tee_shm *shm; |
| + |
| + if (arg->num_params != 1 || |
| + arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) { |
| + arg->ret = TEEC_ERROR_BAD_PARAMETERS; |
| + return; |
| + } |
| + |
| + switch (arg->params[0].u.value.a) { |
| + case OPTEE_RPC_SHM_TYPE_APPL: |
| + shm = cmd_alloc_suppl(ctx, arg->params[0].u.value.b); |
| + break; |
| + case OPTEE_RPC_SHM_TYPE_KERNEL: |
| + shm = tee_shm_alloc(ctx, arg->params[0].u.value.b, |
| + TEE_SHM_MAPPED); |
| + break; |
| + default: |
| + arg->ret = TEEC_ERROR_BAD_PARAMETERS; |
| + return; |
| + } |
| + |
| + if (IS_ERR(shm)) { |
| + arg->ret = TEEC_ERROR_OUT_OF_MEMORY; |
| + return; |
| + } |
| + |
| + arg->params[0] = (struct optee_msg_param){ |
| + .attr = OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT, |
| + .u.fmem.size = tee_shm_get_size(shm), |
| + .u.fmem.global_id = shm->sec_world_id, |
| + .u.fmem.internal_offs = shm->offset, |
| + }; |
| + |
| + arg->ret = TEEC_SUCCESS; |
| +} |
| + |
| +static void handle_ffa_rpc_func_cmd_shm_free(struct tee_context *ctx, |
| + struct optee *optee, |
| + struct optee_msg_arg *arg) |
| +{ |
| + struct tee_shm *shm; |
| + |
| + if (arg->num_params != 1 || |
| + arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) |
| + goto err_bad_param; |
| + |
| + shm = optee_shm_from_ffa_handle(optee, arg->params[0].u.value.b); |
| + if (!shm) |
| + goto err_bad_param; |
| + switch (arg->params[0].u.value.a) { |
| + case OPTEE_RPC_SHM_TYPE_APPL: |
| + cmd_free_suppl(ctx, shm); |
| + break; |
| + case OPTEE_RPC_SHM_TYPE_KERNEL: |
| + tee_shm_free(shm); |
| + break; |
| + default: |
| + goto err_bad_param; |
| + } |
| + arg->ret = TEEC_SUCCESS; |
| + return; |
| + |
| +err_bad_param: |
| + arg->ret = TEEC_ERROR_BAD_PARAMETERS; |
| +} |
| + |
| +static void handle_ffa_rpc_func_cmd(struct tee_context *ctx, |
| + struct optee_msg_arg *arg) |
| +{ |
| + struct optee *optee = tee_get_drvdata(ctx->teedev); |
| + |
| + arg->ret_origin = TEEC_ORIGIN_COMMS; |
| + switch (arg->cmd) { |
| + case OPTEE_RPC_CMD_GET_TIME: |
| + handle_rpc_func_cmd_get_time(arg); |
| + break; |
| + case OPTEE_RPC_CMD_WAIT_QUEUE: |
| + handle_rpc_func_cmd_wq(optee, arg); |
| + break; |
| + case OPTEE_RPC_CMD_SUSPEND: |
| + handle_rpc_func_cmd_wait(arg); |
| + break; |
| + case OPTEE_RPC_CMD_SHM_ALLOC: |
| + handle_ffa_rpc_func_cmd_shm_alloc(ctx, arg); |
| + break; |
| + case OPTEE_RPC_CMD_SHM_FREE: |
| + handle_ffa_rpc_func_cmd_shm_free(ctx, optee, arg); |
| + break; |
| + case OPTEE_RPC_CMD_I2C_TRANSFER: |
| + handle_rpc_func_cmd_i2c_transfer(ctx, arg); |
| + break; |
| + default: |
| + handle_rpc_supp_cmd(ctx, optee, arg); |
| + } |
| +} |
| + |
| +void optee_handle_ffa_rpc(struct tee_context *ctx, u32 cmd, |
| + struct optee_msg_arg *arg) |
| +{ |
| + switch (cmd) { |
| + case OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD: |
| + handle_ffa_rpc_func_cmd(ctx, arg); |
| + break; |
| + case OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT: |
| + /* Interrupt delivered by now */ |
| + break; |
| + default: |
| + pr_warn("Unknown RPC func 0x%x\n", cmd); |
| + break; |
| + } |
| +} |
| +#endif /*CONFIG_ARM_FFA_TRANSPORT*/ |
| -- |
| 2.17.1 |
| |