| Message ID | 20240118100433.3984196-2-arnaud.pouliquen@foss.st.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Introduction of a remoteproc tee to load signed firmware | expand |
Hi Arnaud, On Thu, Jan 18, 2024 at 11:04:30AM +0100, Arnaud Pouliquen wrote: > From: Arnaud Pouliquen <arnaud.pouliquen@st.com> > > Add a remoteproc TEE (Trusted Execution Environment) device Device or driver? Seems to be the latter... > that will be probed by the TEE bus. If the associated Trusted > application is supported on secure part this device offers a client > interface to load a firmware in the secure part. > This firmware could be authenticated and decrypted by the secure > trusted application. > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> > --- > drivers/remoteproc/Kconfig | 9 + > drivers/remoteproc/Makefile | 1 + > drivers/remoteproc/tee_remoteproc.c | 393 ++++++++++++++++++++++++++++ > include/linux/tee_remoteproc.h | 99 +++++++ > 4 files changed, 502 insertions(+) > create mode 100644 drivers/remoteproc/tee_remoteproc.c > create mode 100644 include/linux/tee_remoteproc.h > > diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig > index 48845dc8fa85..85299606806c 100644 > --- a/drivers/remoteproc/Kconfig > +++ b/drivers/remoteproc/Kconfig > @@ -365,6 +365,15 @@ config XLNX_R5_REMOTEPROC > > It's safe to say N if not interested in using RPU r5f cores. > > + > +config TEE_REMOTEPROC > + tristate "trusted firmware support by a TEE application" > + depends on OPTEE > + help > + Support for trusted remote processors firmware. The firmware > + authentication and/or decryption are managed by a trusted application. > + This can be either built-in or a loadable module. > + > endif # REMOTEPROC > > endmenu > diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile > index 91314a9b43ce..fa8daebce277 100644 > --- a/drivers/remoteproc/Makefile > +++ b/drivers/remoteproc/Makefile > @@ -36,6 +36,7 @@ obj-$(CONFIG_RCAR_REMOTEPROC) += rcar_rproc.o > obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o > obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o > obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o > +obj-$(CONFIG_TEE_REMOTEPROC) += tee_remoteproc.o > obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o > obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o > obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o > diff --git a/drivers/remoteproc/tee_remoteproc.c b/drivers/remoteproc/tee_remoteproc.c > new file mode 100644 > index 000000000000..49e1e0caf889 > --- /dev/null > +++ b/drivers/remoteproc/tee_remoteproc.c > @@ -0,0 +1,393 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright (C) STMicroelectronics 2023 - All Rights Reserved > + * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com> > + */ > + > +#include <linux/firmware.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/of_address.h> > +#include <linux/of_device.h> > +#include <linux/of_reserved_mem.h> > +#include <linux/remoteproc.h> > +#include <linux/slab.h> > +#include <linux/tee_drv.h> > +#include <linux/tee_remoteproc.h> > + > +#include "remoteproc_internal.h" > + > +#define MAX_TEE_PARAM_ARRY_MEMBER 4 > + > +/* > + * Authentication of the firmware and load in the remote processor memory > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + * [in] params[1].memref: buffer containing the image of the buffer > + */ > +#define TA_RPROC_FW_CMD_LOAD_FW 1 > + > +/* > + * Start the remote processor > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + */ > +#define TA_RPROC_FW_CMD_START_FW 2 > + > +/* > + * Stop the remote processor > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + */ > +#define TA_RPROC_FW_CMD_STOP_FW 3 > + > +/* > + * Return the address of the resource table, or 0 if not found > + * No check is done to verify that the address returned is accessible by > + * the non secure context. If the resource table is loaded in a protected > + * memory the access by the non secure context will lead to a data abort. > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + * [out] params[1].value.a: 32bit LSB resource table memory address > + * [out] params[1].value.b: 32bit MSB resource table memory address > + * [out] params[2].value.a: 32bit LSB resource table memory size > + * [out] params[2].value.b: 32bit MSB resource table memory size > + */ > +#define TA_RPROC_FW_CMD_GET_RSC_TABLE 4 > + > +/* > + * Return the address of the core dump > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + * [out] params[1].memref: address of the core dump image if exist, > + * else return Null > + */ > +#define TA_RPROC_FW_CMD_GET_COREDUMP 5 > + > +struct tee_rproc_mem { > + char name[20]; > + void __iomem *cpu_addr; > + phys_addr_t bus_addr; > + u32 dev_addr; > + size_t size; > +}; > + > +struct tee_rproc_context { > + struct list_head sessions; > + struct tee_context *tee_ctx; > + struct device *dev; > +}; > + > +static struct tee_rproc_context *tee_rproc_ctx; > + > +static void prepare_args(struct tee_rproc *trproc, int cmd, struct tee_ioctl_invoke_arg *arg, > + struct tee_param *param, unsigned int num_params) > +{ > + memset(arg, 0, sizeof(*arg)); > + memset(param, 0, MAX_TEE_PARAM_ARRY_MEMBER * sizeof(*param)); > + > + arg->func = cmd; > + arg->session = trproc->session_id; > + arg->num_params = num_params + 1; > + > + param[0] = (struct tee_param) { > + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, > + .u.value.a = trproc->rproc_id, > + }; > +} > + > +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + struct tee_shm *fw_shm; > + int ret; > + > + fw_shm = tee_shm_register_kernel_buf(tee_rproc_ctx->tee_ctx, (void *)fw->data, fw->size); > + if (IS_ERR(fw_shm)) > + return PTR_ERR(fw_shm); > + > + prepare_args(trproc, TA_RPROC_FW_CMD_LOAD_FW, &arg, param, 1); > + > + /* Provide the address of the firmware image */ > + param[1] = (struct tee_param) { > + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT, > + .u.memref = { > + .shm = fw_shm, > + .size = fw->size, > + .shm_offs = 0, > + }, > + }; > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_LOAD_FW invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + if (!ret) > + ret = -EIO; > + } > + > + tee_shm_free(fw_shm); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_load_fw); > + > +int rproc_tee_get_rsc_table(struct tee_rproc *trproc) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + struct rproc *rproc = trproc->rproc; > + size_t rsc_size; > + int ret; > + > + prepare_args(trproc, TA_RPROC_FW_CMD_GET_RSC_TABLE, &arg, param, 2); > + > + param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; > + param[2].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_GET_RSC_TABLE invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + return -EIO; > + } > + > + rsc_size = param[2].u.value.a; > + > + /* If the size is null no resource table defined in the image */ > + if (!rsc_size) > + return 0; > + > + /* Store the resource table address that would be updated by the remote core . */ > + trproc->rsc_va = ioremap_wc(param[1].u.value.a, rsc_size); > + if (IS_ERR_OR_NULL(trproc->rsc_va)) { > + dev_err(tee_rproc_ctx->dev, "Unable to map memory region: %lld+%zx\n", > + param[1].u.value.a, rsc_size); > + trproc->rsc_va = NULL; > + return -ENOMEM; > + } > + > + /* > + * A cached table is requested as the physical address is not mapped yet > + * but remoteproc needs to parse the table for resources. > + */ > + rproc->cached_table = kmemdup((__force void *)trproc->rsc_va, rsc_size, GFP_KERNEL); > + if (!rproc->cached_table) > + return -ENOMEM; > + > + rproc->table_ptr = rproc->cached_table; > + rproc->table_sz = rsc_size; > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(rproc_tee_get_rsc_table); > + > +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) > +{ > + return (__force struct resource_table *)trproc->rsc_va; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_get_loaded_rsc_table); > + > +int tee_rproc_start(struct tee_rproc *trproc) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + int ret; > + > + prepare_args(trproc, TA_RPROC_FW_CMD_START_FW, &arg, param, 0); > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_START_FW invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + if (!ret) > + ret = -EIO; > + } > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_start); > + > +int tee_rproc_stop(struct tee_rproc *trproc) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + int ret; > + > + prepare_args(trproc, TA_RPROC_FW_CMD_STOP_FW, &arg, param, 0); > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_STOP_FW invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + if (!ret) > + ret = -EIO; > + } > + if (trproc->rsc_va) > + iounmap(trproc->rsc_va); > + trproc->rsc_va = NULL; > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_stop); > + > +static const struct tee_client_device_id stm32_tee_rproc_id_table[] = { > + {UUID_INIT(0x80a4c275, 0x0a47, 0x4905, > + 0x82, 0x85, 0x14, 0x86, 0xa9, 0x77, 0x1a, 0x08)}, > + {} > +}; > + > +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) > +{ > + struct tee_client_device *rproc_tee_device; > + struct tee_ioctl_open_session_arg sess_arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + struct tee_rproc *trproc; > + int ret; > + > + /* > + * The device is not probed by the TEE bus. We ignore the reason (bus could be not yet > + * probed or service not available in the secure firmware) > + * Assumption here is that the TEE bus is not probed. > + */ > + if (!tee_rproc_ctx) > + return ERR_PTR(-EPROBE_DEFER); > + > + trproc = devm_kzalloc(dev, sizeof(*trproc), GFP_KERNEL); > + if (!trproc) > + return ERR_PTR(-ENOMEM); > + > + rproc_tee_device = to_tee_client_device(tee_rproc_ctx->dev); > + memset(&sess_arg, 0, sizeof(sess_arg)); > + > + /* Open session with rproc_tee load the OP-TEE Trusted Application */ > + memcpy(sess_arg.uuid, rproc_tee_device->id.uuid.b, TEE_IOCTL_UUID_LEN); > + > + sess_arg.clnt_login = TEE_IOCTL_LOGIN_REE_KERNEL; > + sess_arg.num_params = 1; > + > + param[0] = (struct tee_param) { > + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, > + .u.value.a = rproc_id, > + }; > + > + ret = tee_client_open_session(tee_rproc_ctx->tee_ctx, &sess_arg, param); > + if (ret < 0 || sess_arg.ret != 0) { > + dev_err(dev, "tee_client_open_session failed, err: %x\n", sess_arg.ret); > + return ERR_PTR(-EINVAL); > + } > + > + trproc->parent = dev; > + trproc->rproc_id = rproc_id; > + trproc->session_id = sess_arg.session; > + > + list_add_tail(&trproc->node, &tee_rproc_ctx->sessions); > + > + return trproc; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_register); > + > +int tee_rproc_unregister(struct tee_rproc *trproc) > +{ > + int ret; > + > + if (!tee_rproc_ctx) > + return -ENODEV; > + > + ret = tee_client_close_session(tee_rproc_ctx->tee_ctx, trproc->session_id); > + if (ret < 0) > + dev_err(trproc->parent, "tee_client_close_session failed, err: %x\n", ret); > + > + list_del(&trproc->node); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_unregister); > + > +static int tee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) > +{ > + /* Today we support only the OP-TEE, could be extend to other tees */ > + return (ver->impl_id == TEE_IMPL_ID_OPTEE); > +} > + > +static int tee_rproc_probe(struct device *dev) > +{ > + struct tee_context *tee_ctx; > + int ret; > + > + /* Only one RPROC OP-TEE device allowed */ > + if (tee_rproc_ctx) { > + dev_err(dev, "An RPROC OP-TEE device was already initialized: only one allowed\n"); > + return -EBUSY; > + } > + > + /* Open context with TEE driver */ > + tee_ctx = tee_client_open_context(NULL, tee_ctx_match, NULL, NULL); > + if (IS_ERR(tee_ctx)) > + return PTR_ERR(tee_ctx); > + > + tee_rproc_ctx = devm_kzalloc(dev, sizeof(*tee_ctx), GFP_KERNEL); > + if (!tee_ctx) { > + ret = -ENOMEM; > + goto err; > + } > + > + tee_rproc_ctx->dev = dev; > + tee_rproc_ctx->tee_ctx = tee_ctx; > + INIT_LIST_HEAD(&tee_rproc_ctx->sessions); > + > + return 0; > +err: > + tee_client_close_context(tee_ctx); > + > + return ret; > +} > + > +static int tee_rproc_remove(struct device *dev) > +{ > + struct tee_rproc *entry, *tmp; > + > + list_for_each_entry_safe(entry, tmp, &tee_rproc_ctx->sessions, node) { > + tee_client_close_session(tee_rproc_ctx->tee_ctx, entry->session_id); > + list_del(&entry->node); > + kfree(entry); > + } > + > + tee_client_close_context(tee_rproc_ctx->tee_ctx); > + > + return 0; > +} > + > +MODULE_DEVICE_TABLE(tee, stm32_tee_rproc_id_table); > + > +static struct tee_client_driver tee_rproc_fw_driver = { > + .id_table = stm32_tee_rproc_id_table, > + .driver = { > + .name = KBUILD_MODNAME, > + .bus = &tee_bus_type, > + .probe = tee_rproc_probe, > + .remove = tee_rproc_remove, > + }, > +}; > + > +static int __init tee_rproc_fw_mod_init(void) > +{ > + return driver_register(&tee_rproc_fw_driver.driver); > +} > + > +static void __exit tee_rproc_fw_mod_exit(void) > +{ > + driver_unregister(&tee_rproc_fw_driver.driver); > +} > + > +module_init(tee_rproc_fw_mod_init); > +module_exit(tee_rproc_fw_mod_exit); > + > +MODULE_DESCRIPTION(" TEE remote processor control driver"); > +MODULE_LICENSE("GPL"); > diff --git a/include/linux/tee_remoteproc.h b/include/linux/tee_remoteproc.h > new file mode 100644 > index 000000000000..537d6dc3b858 > --- /dev/null > +++ b/include/linux/tee_remoteproc.h > @@ -0,0 +1,99 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* > + * Copyright(c) 2023 STMicroelectronics - All Rights Reserved > + */ > + > +#ifndef TEE_REMOTEPROC_H > +#define TEE_REMOTEPROC_H > + > +#include <linux/remoteproc.h> > +#include <linux/tee_drv.h> > + > +/** > + * struct tee_rproc - TEE remoteproc structure > + * @node: Reference in list > + * @rproc: Remoteproc reference > + * @parent: Parent device > + * @rproc_id: Identifier of the target firmware > + * @session_id: TEE session identifier > + * @rsc_va: Resource table virtual address. > + */ > +struct tee_rproc { > + struct list_head node; > + struct rproc *rproc; > + struct device *parent; > + u32 rproc_id; > + u32 session_id; > + void __iomem *rsc_va; > +}; > + > +#if IS_ENABLED(CONFIG_TEE_REMOTEPROC) > + > +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id); > +int tee_rproc_unregister(struct tee_rproc *trproc); > + > +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw); > +int rproc_tee_get_rsc_table(struct tee_rproc *trproc); Shouldn't this be tee_rproc_get_rsc_table()? Why the exception? > +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc); > +int tee_rproc_start(struct tee_rproc *trproc); > +int tee_rproc_stop(struct tee_rproc *trproc); > + > +#else > + > +static inline struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) > +{ > + return ERR_PTR(-ENODEV); > +} > + > +static inline int tee_rproc_unregister(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ Why can't this be possible? Looking at the Kconfig file it seems entirely plausible to compile stm32_rproc without TEE_REMOTEPROC... More comments to come tomorrow or on Monday. Thanks, Mathieu > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int tee_rproc_load_fw(struct tee_rproc *trproc, > + const struct firmware *fw) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int tee_rproc_start(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int tee_rproc_stop(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int rproc_tee_get_rsc_table(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline struct resource_table * > + tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return NULL; > +} > + > +#endif /* CONFIG_TEE_REMOTEPROC */ > +#endif /* TEE_REMOTEPROC_H */ > -- > 2.25.1 >
Hi Mathieu, On 1/25/24 19:55, Mathieu Poirier wrote: > Hi Arnaud, > > On Thu, Jan 18, 2024 at 11:04:30AM +0100, Arnaud Pouliquen wrote: >> From: Arnaud Pouliquen <arnaud.pouliquen@st.com> >> >> Add a remoteproc TEE (Trusted Execution Environment) device > > Device or driver? Seems to be the latter... Right, driver is better > >> that will be probed by the TEE bus. If the associated Trusted >> application is supported on secure part this device offers a client >> interface to load a firmware in the secure part. >> This firmware could be authenticated and decrypted by the secure >> trusted application. >> >> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> >> --- >> drivers/remoteproc/Kconfig | 9 + >> drivers/remoteproc/Makefile | 1 + >> drivers/remoteproc/tee_remoteproc.c | 393 ++++++++++++++++++++++++++++ >> include/linux/tee_remoteproc.h | 99 +++++++ >> 4 files changed, 502 insertions(+) >> create mode 100644 drivers/remoteproc/tee_remoteproc.c >> create mode 100644 include/linux/tee_remoteproc.h >> >> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig >> index 48845dc8fa85..85299606806c 100644 >> --- a/drivers/remoteproc/Kconfig >> +++ b/drivers/remoteproc/Kconfig >> @@ -365,6 +365,15 @@ config XLNX_R5_REMOTEPROC >> >> It's safe to say N if not interested in using RPU r5f cores. >> >> + >> +config TEE_REMOTEPROC >> + tristate "trusted firmware support by a TEE application" >> + depends on OPTEE >> + help >> + Support for trusted remote processors firmware. The firmware >> + authentication and/or decryption are managed by a trusted application. >> + This can be either built-in or a loadable module. >> + >> endif # REMOTEPROC >> >> endmenu >> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile >> index 91314a9b43ce..fa8daebce277 100644 >> --- a/drivers/remoteproc/Makefile >> +++ b/drivers/remoteproc/Makefile >> @@ -36,6 +36,7 @@ obj-$(CONFIG_RCAR_REMOTEPROC) += rcar_rproc.o >> obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o >> obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o >> obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o >> +obj-$(CONFIG_TEE_REMOTEPROC) += tee_remoteproc.o >> obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o >> obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o >> obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o >> diff --git a/drivers/remoteproc/tee_remoteproc.c b/drivers/remoteproc/tee_remoteproc.c >> new file mode 100644 >> index 000000000000..49e1e0caf889 >> --- /dev/null >> +++ b/drivers/remoteproc/tee_remoteproc.c >> @@ -0,0 +1,393 @@ >> +// SPDX-License-Identifier: GPL-2.0-or-later >> +/* >> + * Copyright (C) STMicroelectronics 2023 - All Rights Reserved >> + * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com> >> + */ >> + >> +#include <linux/firmware.h> >> +#include <linux/interrupt.h> >> +#include <linux/io.h> >> +#include <linux/module.h> >> +#include <linux/of_address.h> >> +#include <linux/of_device.h> >> +#include <linux/of_reserved_mem.h> >> +#include <linux/remoteproc.h> >> +#include <linux/slab.h> >> +#include <linux/tee_drv.h> >> +#include <linux/tee_remoteproc.h> >> + >> +#include "remoteproc_internal.h" >> + >> +#define MAX_TEE_PARAM_ARRY_MEMBER 4 >> + >> +/* >> + * Authentication of the firmware and load in the remote processor memory >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + * [in] params[1].memref: buffer containing the image of the buffer >> + */ >> +#define TA_RPROC_FW_CMD_LOAD_FW 1 >> + >> +/* >> + * Start the remote processor >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + */ >> +#define TA_RPROC_FW_CMD_START_FW 2 >> + >> +/* >> + * Stop the remote processor >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + */ >> +#define TA_RPROC_FW_CMD_STOP_FW 3 >> + >> +/* >> + * Return the address of the resource table, or 0 if not found >> + * No check is done to verify that the address returned is accessible by >> + * the non secure context. If the resource table is loaded in a protected >> + * memory the access by the non secure context will lead to a data abort. >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + * [out] params[1].value.a: 32bit LSB resource table memory address >> + * [out] params[1].value.b: 32bit MSB resource table memory address >> + * [out] params[2].value.a: 32bit LSB resource table memory size >> + * [out] params[2].value.b: 32bit MSB resource table memory size >> + */ >> +#define TA_RPROC_FW_CMD_GET_RSC_TABLE 4 >> + >> +/* >> + * Return the address of the core dump >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + * [out] params[1].memref: address of the core dump image if exist, >> + * else return Null >> + */ >> +#define TA_RPROC_FW_CMD_GET_COREDUMP 5 >> + >> +struct tee_rproc_mem { >> + char name[20]; >> + void __iomem *cpu_addr; >> + phys_addr_t bus_addr; >> + u32 dev_addr; >> + size_t size; >> +}; >> + >> +struct tee_rproc_context { >> + struct list_head sessions; >> + struct tee_context *tee_ctx; >> + struct device *dev; >> +}; >> + >> +static struct tee_rproc_context *tee_rproc_ctx; >> + >> +static void prepare_args(struct tee_rproc *trproc, int cmd, struct tee_ioctl_invoke_arg *arg, >> + struct tee_param *param, unsigned int num_params) >> +{ >> + memset(arg, 0, sizeof(*arg)); >> + memset(param, 0, MAX_TEE_PARAM_ARRY_MEMBER * sizeof(*param)); >> + >> + arg->func = cmd; >> + arg->session = trproc->session_id; >> + arg->num_params = num_params + 1; >> + >> + param[0] = (struct tee_param) { >> + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, >> + .u.value.a = trproc->rproc_id, >> + }; >> +} >> + >> +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw) >> +{ >> + struct tee_ioctl_invoke_arg arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + struct tee_shm *fw_shm; >> + int ret; >> + >> + fw_shm = tee_shm_register_kernel_buf(tee_rproc_ctx->tee_ctx, (void *)fw->data, fw->size); >> + if (IS_ERR(fw_shm)) >> + return PTR_ERR(fw_shm); >> + >> + prepare_args(trproc, TA_RPROC_FW_CMD_LOAD_FW, &arg, param, 1); >> + >> + /* Provide the address of the firmware image */ >> + param[1] = (struct tee_param) { >> + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT, >> + .u.memref = { >> + .shm = fw_shm, >> + .size = fw->size, >> + .shm_offs = 0, >> + }, >> + }; >> + >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); >> + if (ret < 0 || arg.ret != 0) { >> + dev_err(tee_rproc_ctx->dev, >> + "TA_RPROC_FW_CMD_LOAD_FW invoke failed TEE err: %x, ret:%x\n", >> + arg.ret, ret); >> + if (!ret) >> + ret = -EIO; >> + } >> + >> + tee_shm_free(fw_shm); >> + >> + return ret; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_load_fw); >> + >> +int rproc_tee_get_rsc_table(struct tee_rproc *trproc) >> +{ >> + struct tee_ioctl_invoke_arg arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + struct rproc *rproc = trproc->rproc; >> + size_t rsc_size; >> + int ret; >> + >> + prepare_args(trproc, TA_RPROC_FW_CMD_GET_RSC_TABLE, &arg, param, 2); >> + >> + param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; >> + param[2].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; >> + >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); >> + if (ret < 0 || arg.ret != 0) { >> + dev_err(tee_rproc_ctx->dev, >> + "TA_RPROC_FW_CMD_GET_RSC_TABLE invoke failed TEE err: %x, ret:%x\n", >> + arg.ret, ret); >> + return -EIO; >> + } >> + >> + rsc_size = param[2].u.value.a; >> + >> + /* If the size is null no resource table defined in the image */ >> + if (!rsc_size) >> + return 0; >> + >> + /* Store the resource table address that would be updated by the remote core . */ >> + trproc->rsc_va = ioremap_wc(param[1].u.value.a, rsc_size); >> + if (IS_ERR_OR_NULL(trproc->rsc_va)) { >> + dev_err(tee_rproc_ctx->dev, "Unable to map memory region: %lld+%zx\n", >> + param[1].u.value.a, rsc_size); >> + trproc->rsc_va = NULL; >> + return -ENOMEM; >> + } >> + >> + /* >> + * A cached table is requested as the physical address is not mapped yet >> + * but remoteproc needs to parse the table for resources. >> + */ >> + rproc->cached_table = kmemdup((__force void *)trproc->rsc_va, rsc_size, GFP_KERNEL); >> + if (!rproc->cached_table) >> + return -ENOMEM; >> + >> + rproc->table_ptr = rproc->cached_table; >> + rproc->table_sz = rsc_size; >> + >> + return 0; >> +} >> +EXPORT_SYMBOL_GPL(rproc_tee_get_rsc_table); >> + >> +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) >> +{ >> + return (__force struct resource_table *)trproc->rsc_va; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_get_loaded_rsc_table); >> + >> +int tee_rproc_start(struct tee_rproc *trproc) >> +{ >> + struct tee_ioctl_invoke_arg arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + int ret; >> + >> + prepare_args(trproc, TA_RPROC_FW_CMD_START_FW, &arg, param, 0); >> + >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); >> + if (ret < 0 || arg.ret != 0) { >> + dev_err(tee_rproc_ctx->dev, >> + "TA_RPROC_FW_CMD_START_FW invoke failed TEE err: %x, ret:%x\n", >> + arg.ret, ret); >> + if (!ret) >> + ret = -EIO; >> + } >> + >> + return ret; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_start); >> + >> +int tee_rproc_stop(struct tee_rproc *trproc) >> +{ >> + struct tee_ioctl_invoke_arg arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + int ret; >> + >> + prepare_args(trproc, TA_RPROC_FW_CMD_STOP_FW, &arg, param, 0); >> + >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); >> + if (ret < 0 || arg.ret != 0) { >> + dev_err(tee_rproc_ctx->dev, >> + "TA_RPROC_FW_CMD_STOP_FW invoke failed TEE err: %x, ret:%x\n", >> + arg.ret, ret); >> + if (!ret) >> + ret = -EIO; >> + } >> + if (trproc->rsc_va) >> + iounmap(trproc->rsc_va); >> + trproc->rsc_va = NULL; >> + >> + return ret; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_stop); >> + >> +static const struct tee_client_device_id stm32_tee_rproc_id_table[] = { >> + {UUID_INIT(0x80a4c275, 0x0a47, 0x4905, >> + 0x82, 0x85, 0x14, 0x86, 0xa9, 0x77, 0x1a, 0x08)}, >> + {} >> +}; >> + >> +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) >> +{ >> + struct tee_client_device *rproc_tee_device; >> + struct tee_ioctl_open_session_arg sess_arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + struct tee_rproc *trproc; >> + int ret; >> + >> + /* >> + * The device is not probed by the TEE bus. We ignore the reason (bus could be not yet >> + * probed or service not available in the secure firmware) >> + * Assumption here is that the TEE bus is not probed. >> + */ >> + if (!tee_rproc_ctx) >> + return ERR_PTR(-EPROBE_DEFER); >> + >> + trproc = devm_kzalloc(dev, sizeof(*trproc), GFP_KERNEL); >> + if (!trproc) >> + return ERR_PTR(-ENOMEM); >> + >> + rproc_tee_device = to_tee_client_device(tee_rproc_ctx->dev); >> + memset(&sess_arg, 0, sizeof(sess_arg)); >> + >> + /* Open session with rproc_tee load the OP-TEE Trusted Application */ >> + memcpy(sess_arg.uuid, rproc_tee_device->id.uuid.b, TEE_IOCTL_UUID_LEN); >> + >> + sess_arg.clnt_login = TEE_IOCTL_LOGIN_REE_KERNEL; >> + sess_arg.num_params = 1; >> + >> + param[0] = (struct tee_param) { >> + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, >> + .u.value.a = rproc_id, >> + }; >> + >> + ret = tee_client_open_session(tee_rproc_ctx->tee_ctx, &sess_arg, param); >> + if (ret < 0 || sess_arg.ret != 0) { >> + dev_err(dev, "tee_client_open_session failed, err: %x\n", sess_arg.ret); >> + return ERR_PTR(-EINVAL); >> + } >> + >> + trproc->parent = dev; >> + trproc->rproc_id = rproc_id; >> + trproc->session_id = sess_arg.session; >> + >> + list_add_tail(&trproc->node, &tee_rproc_ctx->sessions); >> + >> + return trproc; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_register); >> + >> +int tee_rproc_unregister(struct tee_rproc *trproc) >> +{ >> + int ret; >> + >> + if (!tee_rproc_ctx) >> + return -ENODEV; >> + >> + ret = tee_client_close_session(tee_rproc_ctx->tee_ctx, trproc->session_id); >> + if (ret < 0) >> + dev_err(trproc->parent, "tee_client_close_session failed, err: %x\n", ret); >> + >> + list_del(&trproc->node); >> + >> + return ret; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_unregister); >> + >> +static int tee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) >> +{ >> + /* Today we support only the OP-TEE, could be extend to other tees */ >> + return (ver->impl_id == TEE_IMPL_ID_OPTEE); >> +} >> + >> +static int tee_rproc_probe(struct device *dev) >> +{ >> + struct tee_context *tee_ctx; >> + int ret; >> + >> + /* Only one RPROC OP-TEE device allowed */ >> + if (tee_rproc_ctx) { >> + dev_err(dev, "An RPROC OP-TEE device was already initialized: only one allowed\n"); >> + return -EBUSY; >> + } >> + >> + /* Open context with TEE driver */ >> + tee_ctx = tee_client_open_context(NULL, tee_ctx_match, NULL, NULL); >> + if (IS_ERR(tee_ctx)) >> + return PTR_ERR(tee_ctx); >> + >> + tee_rproc_ctx = devm_kzalloc(dev, sizeof(*tee_ctx), GFP_KERNEL); >> + if (!tee_ctx) { >> + ret = -ENOMEM; >> + goto err; >> + } >> + >> + tee_rproc_ctx->dev = dev; >> + tee_rproc_ctx->tee_ctx = tee_ctx; >> + INIT_LIST_HEAD(&tee_rproc_ctx->sessions); >> + >> + return 0; >> +err: >> + tee_client_close_context(tee_ctx); >> + >> + return ret; >> +} >> + >> +static int tee_rproc_remove(struct device *dev) >> +{ >> + struct tee_rproc *entry, *tmp; >> + >> + list_for_each_entry_safe(entry, tmp, &tee_rproc_ctx->sessions, node) { >> + tee_client_close_session(tee_rproc_ctx->tee_ctx, entry->session_id); >> + list_del(&entry->node); >> + kfree(entry); >> + } >> + >> + tee_client_close_context(tee_rproc_ctx->tee_ctx); >> + >> + return 0; >> +} >> + >> +MODULE_DEVICE_TABLE(tee, stm32_tee_rproc_id_table); >> + >> +static struct tee_client_driver tee_rproc_fw_driver = { >> + .id_table = stm32_tee_rproc_id_table, >> + .driver = { >> + .name = KBUILD_MODNAME, >> + .bus = &tee_bus_type, >> + .probe = tee_rproc_probe, >> + .remove = tee_rproc_remove, >> + }, >> +}; >> + >> +static int __init tee_rproc_fw_mod_init(void) >> +{ >> + return driver_register(&tee_rproc_fw_driver.driver); >> +} >> + >> +static void __exit tee_rproc_fw_mod_exit(void) >> +{ >> + driver_unregister(&tee_rproc_fw_driver.driver); >> +} >> + >> +module_init(tee_rproc_fw_mod_init); >> +module_exit(tee_rproc_fw_mod_exit); >> + >> +MODULE_DESCRIPTION(" TEE remote processor control driver"); >> +MODULE_LICENSE("GPL"); >> diff --git a/include/linux/tee_remoteproc.h b/include/linux/tee_remoteproc.h >> new file mode 100644 >> index 000000000000..537d6dc3b858 >> --- /dev/null >> +++ b/include/linux/tee_remoteproc.h >> @@ -0,0 +1,99 @@ >> +/* SPDX-License-Identifier: GPL-2.0-or-later */ >> +/* >> + * Copyright(c) 2023 STMicroelectronics - All Rights Reserved >> + */ >> + >> +#ifndef TEE_REMOTEPROC_H >> +#define TEE_REMOTEPROC_H >> + >> +#include <linux/remoteproc.h> >> +#include <linux/tee_drv.h> >> + >> +/** >> + * struct tee_rproc - TEE remoteproc structure >> + * @node: Reference in list >> + * @rproc: Remoteproc reference >> + * @parent: Parent device >> + * @rproc_id: Identifier of the target firmware >> + * @session_id: TEE session identifier >> + * @rsc_va: Resource table virtual address. >> + */ >> +struct tee_rproc { >> + struct list_head node; >> + struct rproc *rproc; >> + struct device *parent; >> + u32 rproc_id; >> + u32 session_id; >> + void __iomem *rsc_va; >> +}; >> + >> +#if IS_ENABLED(CONFIG_TEE_REMOTEPROC) >> + >> +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id); >> +int tee_rproc_unregister(struct tee_rproc *trproc); >> + >> +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw); >> +int rproc_tee_get_rsc_table(struct tee_rproc *trproc); > > Shouldn't this be tee_rproc_get_rsc_table()? Why the exception? No reason, just a miss during concatenation of patches to prepare the series. I will change this. > >> +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc); >> +int tee_rproc_start(struct tee_rproc *trproc); >> +int tee_rproc_stop(struct tee_rproc *trproc); >> + >> +#else >> + >> +static inline struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) >> +{ >> + return ERR_PTR(-ENODEV); >> +} >> + >> +static inline int tee_rproc_unregister(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ > > Why can't this be possible? Looking at the Kconfig file it seems entirely > plausible to compile stm32_rproc without TEE_REMOTEPROC... This sentence is copied from rpmsg.h [1]. It is not possible to call the API if the TEE_REMOTEPROC is not set, as an error is returned by tee_rproc_register. Therefore, we should not fall into a state where we call this API or another one. [1]https://elixir.bootlin.com/linux/v6.7.1/source/include/linux/rpmsg.h#L218 Thanks, Arnaud > > More comments to come tomorrow or on Monday. > > Thanks, > Mathieu > >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline int tee_rproc_load_fw(struct tee_rproc *trproc, >> + const struct firmware *fw) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline int tee_rproc_start(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline int tee_rproc_stop(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline int rproc_tee_get_rsc_table(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline struct resource_table * >> + tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return NULL; >> +} >> + >> +#endif /* CONFIG_TEE_REMOTEPROC */ >> +#endif /* TEE_REMOTEPROC_H */ >> -- >> 2.25.1 >>
On Fri, Jan 26, 2024 at 02:39:33PM +0100, Arnaud POULIQUEN wrote: > Hi Mathieu, > > On 1/25/24 19:55, Mathieu Poirier wrote: > > Hi Arnaud, > > > > On Thu, Jan 18, 2024 at 11:04:30AM +0100, Arnaud Pouliquen wrote: > >> From: Arnaud Pouliquen <arnaud.pouliquen@st.com> > >> > >> Add a remoteproc TEE (Trusted Execution Environment) device > > > > Device or driver? Seems to be the latter... > > Right, driver is better > > > > >> that will be probed by the TEE bus. If the associated Trusted > >> application is supported on secure part this device offers a client > >> interface to load a firmware in the secure part. > >> This firmware could be authenticated and decrypted by the secure > >> trusted application. > >> > >> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> > >> --- > >> drivers/remoteproc/Kconfig | 9 + > >> drivers/remoteproc/Makefile | 1 + > >> drivers/remoteproc/tee_remoteproc.c | 393 ++++++++++++++++++++++++++++ > >> include/linux/tee_remoteproc.h | 99 +++++++ > >> 4 files changed, 502 insertions(+) > >> create mode 100644 drivers/remoteproc/tee_remoteproc.c > >> create mode 100644 include/linux/tee_remoteproc.h > >> > >> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig > >> index 48845dc8fa85..85299606806c 100644 > >> --- a/drivers/remoteproc/Kconfig > >> +++ b/drivers/remoteproc/Kconfig > >> @@ -365,6 +365,15 @@ config XLNX_R5_REMOTEPROC > >> > >> It's safe to say N if not interested in using RPU r5f cores. > >> > >> + > >> +config TEE_REMOTEPROC > >> + tristate "trusted firmware support by a TEE application" > >> + depends on OPTEE > >> + help > >> + Support for trusted remote processors firmware. The firmware > >> + authentication and/or decryption are managed by a trusted application. > >> + This can be either built-in or a loadable module. > >> + > >> endif # REMOTEPROC > >> > >> endmenu > >> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile > >> index 91314a9b43ce..fa8daebce277 100644 > >> --- a/drivers/remoteproc/Makefile > >> +++ b/drivers/remoteproc/Makefile > >> @@ -36,6 +36,7 @@ obj-$(CONFIG_RCAR_REMOTEPROC) += rcar_rproc.o > >> obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o > >> obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o > >> obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o > >> +obj-$(CONFIG_TEE_REMOTEPROC) += tee_remoteproc.o > >> obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o > >> obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o > >> obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o > >> diff --git a/drivers/remoteproc/tee_remoteproc.c b/drivers/remoteproc/tee_remoteproc.c > >> new file mode 100644 > >> index 000000000000..49e1e0caf889 > >> --- /dev/null > >> +++ b/drivers/remoteproc/tee_remoteproc.c > >> @@ -0,0 +1,393 @@ > >> +// SPDX-License-Identifier: GPL-2.0-or-later > >> +/* > >> + * Copyright (C) STMicroelectronics 2023 - All Rights Reserved > >> + * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com> > >> + */ > >> + > >> +#include <linux/firmware.h> > >> +#include <linux/interrupt.h> > >> +#include <linux/io.h> > >> +#include <linux/module.h> > >> +#include <linux/of_address.h> > >> +#include <linux/of_device.h> > >> +#include <linux/of_reserved_mem.h> > >> +#include <linux/remoteproc.h> > >> +#include <linux/slab.h> > >> +#include <linux/tee_drv.h> > >> +#include <linux/tee_remoteproc.h> > >> + > >> +#include "remoteproc_internal.h" > >> + > >> +#define MAX_TEE_PARAM_ARRY_MEMBER 4 > >> + > >> +/* > >> + * Authentication of the firmware and load in the remote processor memory > >> + * > >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor > >> + * [in] params[1].memref: buffer containing the image of the buffer > >> + */ > >> +#define TA_RPROC_FW_CMD_LOAD_FW 1 > >> + > >> +/* > >> + * Start the remote processor > >> + * > >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor > >> + */ > >> +#define TA_RPROC_FW_CMD_START_FW 2 > >> + > >> +/* > >> + * Stop the remote processor > >> + * > >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor > >> + */ > >> +#define TA_RPROC_FW_CMD_STOP_FW 3 > >> + > >> +/* > >> + * Return the address of the resource table, or 0 if not found > >> + * No check is done to verify that the address returned is accessible by > >> + * the non secure context. If the resource table is loaded in a protected > >> + * memory the access by the non secure context will lead to a data abort. > >> + * > >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor > >> + * [out] params[1].value.a: 32bit LSB resource table memory address > >> + * [out] params[1].value.b: 32bit MSB resource table memory address > >> + * [out] params[2].value.a: 32bit LSB resource table memory size > >> + * [out] params[2].value.b: 32bit MSB resource table memory size > >> + */ > >> +#define TA_RPROC_FW_CMD_GET_RSC_TABLE 4 > >> + > >> +/* > >> + * Return the address of the core dump > >> + * > >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor > >> + * [out] params[1].memref: address of the core dump image if exist, > >> + * else return Null > >> + */ > >> +#define TA_RPROC_FW_CMD_GET_COREDUMP 5 > >> + > >> +struct tee_rproc_mem { > >> + char name[20]; > >> + void __iomem *cpu_addr; > >> + phys_addr_t bus_addr; > >> + u32 dev_addr; > >> + size_t size; > >> +}; > >> + > >> +struct tee_rproc_context { > >> + struct list_head sessions; > >> + struct tee_context *tee_ctx; > >> + struct device *dev; > >> +}; > >> + > >> +static struct tee_rproc_context *tee_rproc_ctx; > >> + > >> +static void prepare_args(struct tee_rproc *trproc, int cmd, struct tee_ioctl_invoke_arg *arg, > >> + struct tee_param *param, unsigned int num_params) > >> +{ > >> + memset(arg, 0, sizeof(*arg)); > >> + memset(param, 0, MAX_TEE_PARAM_ARRY_MEMBER * sizeof(*param)); > >> + > >> + arg->func = cmd; > >> + arg->session = trproc->session_id; > >> + arg->num_params = num_params + 1; > >> + > >> + param[0] = (struct tee_param) { > >> + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, > >> + .u.value.a = trproc->rproc_id, > >> + }; > >> +} > >> + > >> +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw) > >> +{ > >> + struct tee_ioctl_invoke_arg arg; > >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > >> + struct tee_shm *fw_shm; > >> + int ret; > >> + > >> + fw_shm = tee_shm_register_kernel_buf(tee_rproc_ctx->tee_ctx, (void *)fw->data, fw->size); > >> + if (IS_ERR(fw_shm)) > >> + return PTR_ERR(fw_shm); > >> + > >> + prepare_args(trproc, TA_RPROC_FW_CMD_LOAD_FW, &arg, param, 1); > >> + > >> + /* Provide the address of the firmware image */ > >> + param[1] = (struct tee_param) { > >> + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT, > >> + .u.memref = { > >> + .shm = fw_shm, > >> + .size = fw->size, > >> + .shm_offs = 0, > >> + }, > >> + }; > >> + > >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > >> + if (ret < 0 || arg.ret != 0) { > >> + dev_err(tee_rproc_ctx->dev, > >> + "TA_RPROC_FW_CMD_LOAD_FW invoke failed TEE err: %x, ret:%x\n", > >> + arg.ret, ret); > >> + if (!ret) > >> + ret = -EIO; > >> + } > >> + > >> + tee_shm_free(fw_shm); > >> + > >> + return ret; > >> +} > >> +EXPORT_SYMBOL_GPL(tee_rproc_load_fw); > >> + > >> +int rproc_tee_get_rsc_table(struct tee_rproc *trproc) > >> +{ > >> + struct tee_ioctl_invoke_arg arg; > >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > >> + struct rproc *rproc = trproc->rproc; > >> + size_t rsc_size; > >> + int ret; > >> + > >> + prepare_args(trproc, TA_RPROC_FW_CMD_GET_RSC_TABLE, &arg, param, 2); > >> + > >> + param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; > >> + param[2].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; > >> + > >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > >> + if (ret < 0 || arg.ret != 0) { > >> + dev_err(tee_rproc_ctx->dev, > >> + "TA_RPROC_FW_CMD_GET_RSC_TABLE invoke failed TEE err: %x, ret:%x\n", > >> + arg.ret, ret); > >> + return -EIO; > >> + } > >> + > >> + rsc_size = param[2].u.value.a; > >> + > >> + /* If the size is null no resource table defined in the image */ > >> + if (!rsc_size) > >> + return 0; > >> + > >> + /* Store the resource table address that would be updated by the remote core . */ > >> + trproc->rsc_va = ioremap_wc(param[1].u.value.a, rsc_size); > >> + if (IS_ERR_OR_NULL(trproc->rsc_va)) { > >> + dev_err(tee_rproc_ctx->dev, "Unable to map memory region: %lld+%zx\n", > >> + param[1].u.value.a, rsc_size); > >> + trproc->rsc_va = NULL; > >> + return -ENOMEM; > >> + } > >> + > >> + /* > >> + * A cached table is requested as the physical address is not mapped yet > >> + * but remoteproc needs to parse the table for resources. > >> + */ > >> + rproc->cached_table = kmemdup((__force void *)trproc->rsc_va, rsc_size, GFP_KERNEL); > >> + if (!rproc->cached_table) > >> + return -ENOMEM; > >> + > >> + rproc->table_ptr = rproc->cached_table; > >> + rproc->table_sz = rsc_size; > >> + > >> + return 0; > >> +} > >> +EXPORT_SYMBOL_GPL(rproc_tee_get_rsc_table); > >> + > >> +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) > >> +{ > >> + return (__force struct resource_table *)trproc->rsc_va; > >> +} > >> +EXPORT_SYMBOL_GPL(tee_rproc_get_loaded_rsc_table); > >> + > >> +int tee_rproc_start(struct tee_rproc *trproc) > >> +{ > >> + struct tee_ioctl_invoke_arg arg; > >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > >> + int ret; > >> + > >> + prepare_args(trproc, TA_RPROC_FW_CMD_START_FW, &arg, param, 0); > >> + > >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > >> + if (ret < 0 || arg.ret != 0) { > >> + dev_err(tee_rproc_ctx->dev, > >> + "TA_RPROC_FW_CMD_START_FW invoke failed TEE err: %x, ret:%x\n", > >> + arg.ret, ret); > >> + if (!ret) > >> + ret = -EIO; > >> + } > >> + > >> + return ret; > >> +} > >> +EXPORT_SYMBOL_GPL(tee_rproc_start); > >> + > >> +int tee_rproc_stop(struct tee_rproc *trproc) > >> +{ > >> + struct tee_ioctl_invoke_arg arg; > >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > >> + int ret; > >> + > >> + prepare_args(trproc, TA_RPROC_FW_CMD_STOP_FW, &arg, param, 0); > >> + > >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > >> + if (ret < 0 || arg.ret != 0) { > >> + dev_err(tee_rproc_ctx->dev, > >> + "TA_RPROC_FW_CMD_STOP_FW invoke failed TEE err: %x, ret:%x\n", > >> + arg.ret, ret); > >> + if (!ret) > >> + ret = -EIO; > >> + } > >> + if (trproc->rsc_va) > >> + iounmap(trproc->rsc_va); > >> + trproc->rsc_va = NULL; > >> + > >> + return ret; > >> +} > >> +EXPORT_SYMBOL_GPL(tee_rproc_stop); > >> + > >> +static const struct tee_client_device_id stm32_tee_rproc_id_table[] = { > >> + {UUID_INIT(0x80a4c275, 0x0a47, 0x4905, > >> + 0x82, 0x85, 0x14, 0x86, 0xa9, 0x77, 0x1a, 0x08)}, > >> + {} > >> +}; > >> + > >> +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) > >> +{ > >> + struct tee_client_device *rproc_tee_device; > >> + struct tee_ioctl_open_session_arg sess_arg; > >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > >> + struct tee_rproc *trproc; > >> + int ret; > >> + > >> + /* > >> + * The device is not probed by the TEE bus. We ignore the reason (bus could be not yet > >> + * probed or service not available in the secure firmware) > >> + * Assumption here is that the TEE bus is not probed. > >> + */ > >> + if (!tee_rproc_ctx) > >> + return ERR_PTR(-EPROBE_DEFER); > >> + > >> + trproc = devm_kzalloc(dev, sizeof(*trproc), GFP_KERNEL); > >> + if (!trproc) > >> + return ERR_PTR(-ENOMEM); > >> + > >> + rproc_tee_device = to_tee_client_device(tee_rproc_ctx->dev); > >> + memset(&sess_arg, 0, sizeof(sess_arg)); > >> + > >> + /* Open session with rproc_tee load the OP-TEE Trusted Application */ > >> + memcpy(sess_arg.uuid, rproc_tee_device->id.uuid.b, TEE_IOCTL_UUID_LEN); > >> + > >> + sess_arg.clnt_login = TEE_IOCTL_LOGIN_REE_KERNEL; > >> + sess_arg.num_params = 1; > >> + > >> + param[0] = (struct tee_param) { > >> + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, > >> + .u.value.a = rproc_id, > >> + }; > >> + > >> + ret = tee_client_open_session(tee_rproc_ctx->tee_ctx, &sess_arg, param); > >> + if (ret < 0 || sess_arg.ret != 0) { > >> + dev_err(dev, "tee_client_open_session failed, err: %x\n", sess_arg.ret); > >> + return ERR_PTR(-EINVAL); > >> + } > >> + > >> + trproc->parent = dev; > >> + trproc->rproc_id = rproc_id; > >> + trproc->session_id = sess_arg.session; > >> + > >> + list_add_tail(&trproc->node, &tee_rproc_ctx->sessions); > >> + > >> + return trproc; > >> +} > >> +EXPORT_SYMBOL_GPL(tee_rproc_register); > >> + > >> +int tee_rproc_unregister(struct tee_rproc *trproc) > >> +{ > >> + int ret; > >> + > >> + if (!tee_rproc_ctx) > >> + return -ENODEV; > >> + > >> + ret = tee_client_close_session(tee_rproc_ctx->tee_ctx, trproc->session_id); > >> + if (ret < 0) > >> + dev_err(trproc->parent, "tee_client_close_session failed, err: %x\n", ret); > >> + > >> + list_del(&trproc->node); > >> + > >> + return ret; > >> +} > >> +EXPORT_SYMBOL_GPL(tee_rproc_unregister); > >> + > >> +static int tee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) > >> +{ > >> + /* Today we support only the OP-TEE, could be extend to other tees */ > >> + return (ver->impl_id == TEE_IMPL_ID_OPTEE); > >> +} > >> + > >> +static int tee_rproc_probe(struct device *dev) > >> +{ > >> + struct tee_context *tee_ctx; > >> + int ret; > >> + > >> + /* Only one RPROC OP-TEE device allowed */ > >> + if (tee_rproc_ctx) { > >> + dev_err(dev, "An RPROC OP-TEE device was already initialized: only one allowed\n"); > >> + return -EBUSY; > >> + } > >> + > >> + /* Open context with TEE driver */ > >> + tee_ctx = tee_client_open_context(NULL, tee_ctx_match, NULL, NULL); > >> + if (IS_ERR(tee_ctx)) > >> + return PTR_ERR(tee_ctx); > >> + > >> + tee_rproc_ctx = devm_kzalloc(dev, sizeof(*tee_ctx), GFP_KERNEL); > >> + if (!tee_ctx) { > >> + ret = -ENOMEM; > >> + goto err; > >> + } > >> + > >> + tee_rproc_ctx->dev = dev; > >> + tee_rproc_ctx->tee_ctx = tee_ctx; > >> + INIT_LIST_HEAD(&tee_rproc_ctx->sessions); > >> + > >> + return 0; > >> +err: > >> + tee_client_close_context(tee_ctx); > >> + > >> + return ret; > >> +} > >> + > >> +static int tee_rproc_remove(struct device *dev) > >> +{ > >> + struct tee_rproc *entry, *tmp; > >> + > >> + list_for_each_entry_safe(entry, tmp, &tee_rproc_ctx->sessions, node) { > >> + tee_client_close_session(tee_rproc_ctx->tee_ctx, entry->session_id); > >> + list_del(&entry->node); > >> + kfree(entry); > >> + } > >> + > >> + tee_client_close_context(tee_rproc_ctx->tee_ctx); > >> + > >> + return 0; > >> +} > >> + > >> +MODULE_DEVICE_TABLE(tee, stm32_tee_rproc_id_table); > >> + > >> +static struct tee_client_driver tee_rproc_fw_driver = { > >> + .id_table = stm32_tee_rproc_id_table, > >> + .driver = { > >> + .name = KBUILD_MODNAME, > >> + .bus = &tee_bus_type, > >> + .probe = tee_rproc_probe, > >> + .remove = tee_rproc_remove, > >> + }, > >> +}; > >> + > >> +static int __init tee_rproc_fw_mod_init(void) > >> +{ > >> + return driver_register(&tee_rproc_fw_driver.driver); > >> +} > >> + > >> +static void __exit tee_rproc_fw_mod_exit(void) > >> +{ > >> + driver_unregister(&tee_rproc_fw_driver.driver); > >> +} > >> + > >> +module_init(tee_rproc_fw_mod_init); > >> +module_exit(tee_rproc_fw_mod_exit); > >> + > >> +MODULE_DESCRIPTION(" TEE remote processor control driver"); > >> +MODULE_LICENSE("GPL"); > >> diff --git a/include/linux/tee_remoteproc.h b/include/linux/tee_remoteproc.h > >> new file mode 100644 > >> index 000000000000..537d6dc3b858 > >> --- /dev/null > >> +++ b/include/linux/tee_remoteproc.h > >> @@ -0,0 +1,99 @@ > >> +/* SPDX-License-Identifier: GPL-2.0-or-later */ > >> +/* > >> + * Copyright(c) 2023 STMicroelectronics - All Rights Reserved > >> + */ > >> + > >> +#ifndef TEE_REMOTEPROC_H > >> +#define TEE_REMOTEPROC_H > >> + > >> +#include <linux/remoteproc.h> > >> +#include <linux/tee_drv.h> > >> + > >> +/** > >> + * struct tee_rproc - TEE remoteproc structure > >> + * @node: Reference in list > >> + * @rproc: Remoteproc reference > >> + * @parent: Parent device > >> + * @rproc_id: Identifier of the target firmware > >> + * @session_id: TEE session identifier > >> + * @rsc_va: Resource table virtual address. > >> + */ > >> +struct tee_rproc { > >> + struct list_head node; > >> + struct rproc *rproc; > >> + struct device *parent; > >> + u32 rproc_id; > >> + u32 session_id; > >> + void __iomem *rsc_va; > >> +}; > >> + > >> +#if IS_ENABLED(CONFIG_TEE_REMOTEPROC) > >> + > >> +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id); > >> +int tee_rproc_unregister(struct tee_rproc *trproc); > >> + > >> +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw); > >> +int rproc_tee_get_rsc_table(struct tee_rproc *trproc); > > > > Shouldn't this be tee_rproc_get_rsc_table()? Why the exception? > > No reason, just a miss during concatenation of patches to prepare the series. > I will change this. > > > > >> +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc); > >> +int tee_rproc_start(struct tee_rproc *trproc); > >> +int tee_rproc_stop(struct tee_rproc *trproc); > >> + > >> +#else > >> + > >> +static inline struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) > >> +{ > >> + return ERR_PTR(-ENODEV); > >> +} > >> + > >> +static inline int tee_rproc_unregister(struct tee_rproc *trproc) > >> +{ > >> + /* This shouldn't be possible */ > > > > Why can't this be possible? Looking at the Kconfig file it seems entirely > > plausible to compile stm32_rproc without TEE_REMOTEPROC... > > This sentence is copied from rpmsg.h [1]. It is not possible to call the API if > the TEE_REMOTEPROC is not set, as an error is returned by tee_rproc_register. Yes, I see. I agree with your assessment. > Therefore, we should not fall into a state where we call this API or another one. > > [1]https://elixir.bootlin.com/linux/v6.7.1/source/include/linux/rpmsg.h#L218 > > Thanks, > Arnaud > > > > > More comments to come tomorrow or on Monday. > > > > Thanks, > > Mathieu > > > >> + WARN_ON(1); > >> + > >> + return 0; > >> +} > >> + > >> +static inline int tee_rproc_load_fw(struct tee_rproc *trproc, > >> + const struct firmware *fw) > >> +{ > >> + /* This shouldn't be possible */ > >> + WARN_ON(1); > >> + > >> + return 0; > >> +} > >> + > >> +static inline int tee_rproc_start(struct tee_rproc *trproc) > >> +{ > >> + /* This shouldn't be possible */ > >> + WARN_ON(1); > >> + > >> + return 0; > >> +} > >> + > >> +static inline int tee_rproc_stop(struct tee_rproc *trproc) > >> +{ > >> + /* This shouldn't be possible */ > >> + WARN_ON(1); > >> + > >> + return 0; > >> +} > >> + > >> +static inline int rproc_tee_get_rsc_table(struct tee_rproc *trproc) > >> +{ > >> + /* This shouldn't be possible */ > >> + WARN_ON(1); > >> + > >> + return 0; > >> +} > >> + > >> +static inline struct resource_table * > >> + tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) > >> +{ > >> + /* This shouldn't be possible */ > >> + WARN_ON(1); > >> + > >> + return NULL; > >> +} > >> + > >> +#endif /* CONFIG_TEE_REMOTEPROC */ > >> +#endif /* TEE_REMOTEPROC_H */ > >> -- > >> 2.25.1 > >>
On Thu, Jan 18, 2024 at 11:04:30AM +0100, Arnaud Pouliquen wrote: > From: Arnaud Pouliquen <arnaud.pouliquen@st.com> > > Add a remoteproc TEE (Trusted Execution Environment) device > that will be probed by the TEE bus. If the associated Trusted > application is supported on secure part this device offers a client > interface to load a firmware in the secure part. > This firmware could be authenticated and decrypted by the secure > trusted application. > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> > --- > drivers/remoteproc/Kconfig | 9 + > drivers/remoteproc/Makefile | 1 + > drivers/remoteproc/tee_remoteproc.c | 393 ++++++++++++++++++++++++++++ > include/linux/tee_remoteproc.h | 99 +++++++ > 4 files changed, 502 insertions(+) > create mode 100644 drivers/remoteproc/tee_remoteproc.c > create mode 100644 include/linux/tee_remoteproc.h > > diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig > index 48845dc8fa85..85299606806c 100644 > --- a/drivers/remoteproc/Kconfig > +++ b/drivers/remoteproc/Kconfig > @@ -365,6 +365,15 @@ config XLNX_R5_REMOTEPROC > > It's safe to say N if not interested in using RPU r5f cores. > > + > +config TEE_REMOTEPROC > + tristate "trusted firmware support by a TEE application" > + depends on OPTEE > + help > + Support for trusted remote processors firmware. The firmware > + authentication and/or decryption are managed by a trusted application. > + This can be either built-in or a loadable module. > + > endif # REMOTEPROC > > endmenu > diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile > index 91314a9b43ce..fa8daebce277 100644 > --- a/drivers/remoteproc/Makefile > +++ b/drivers/remoteproc/Makefile > @@ -36,6 +36,7 @@ obj-$(CONFIG_RCAR_REMOTEPROC) += rcar_rproc.o > obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o > obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o > obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o > +obj-$(CONFIG_TEE_REMOTEPROC) += tee_remoteproc.o > obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o > obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o > obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o > diff --git a/drivers/remoteproc/tee_remoteproc.c b/drivers/remoteproc/tee_remoteproc.c > new file mode 100644 > index 000000000000..49e1e0caf889 > --- /dev/null > +++ b/drivers/remoteproc/tee_remoteproc.c > @@ -0,0 +1,393 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright (C) STMicroelectronics 2023 - All Rights Reserved > + * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com> > + */ > + > +#include <linux/firmware.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/of_address.h> > +#include <linux/of_device.h> > +#include <linux/of_reserved_mem.h> > +#include <linux/remoteproc.h> > +#include <linux/slab.h> > +#include <linux/tee_drv.h> > +#include <linux/tee_remoteproc.h> > + > +#include "remoteproc_internal.h" > + > +#define MAX_TEE_PARAM_ARRY_MEMBER 4 > + > +/* > + * Authentication of the firmware and load in the remote processor memory > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + * [in] params[1].memref: buffer containing the image of the buffer > + */ > +#define TA_RPROC_FW_CMD_LOAD_FW 1 > + > +/* > + * Start the remote processor > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + */ > +#define TA_RPROC_FW_CMD_START_FW 2 > + > +/* > + * Stop the remote processor > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + */ > +#define TA_RPROC_FW_CMD_STOP_FW 3 > + > +/* > + * Return the address of the resource table, or 0 if not found > + * No check is done to verify that the address returned is accessible by > + * the non secure context. If the resource table is loaded in a protected > + * memory the access by the non secure context will lead to a data abort. > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + * [out] params[1].value.a: 32bit LSB resource table memory address > + * [out] params[1].value.b: 32bit MSB resource table memory address > + * [out] params[2].value.a: 32bit LSB resource table memory size > + * [out] params[2].value.b: 32bit MSB resource table memory size > + */ > +#define TA_RPROC_FW_CMD_GET_RSC_TABLE 4 > + > +/* > + * Return the address of the core dump > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + * [out] params[1].memref: address of the core dump image if exist, > + * else return Null > + */ > +#define TA_RPROC_FW_CMD_GET_COREDUMP 5 > + > +struct tee_rproc_mem { > + char name[20]; > + void __iomem *cpu_addr; > + phys_addr_t bus_addr; > + u32 dev_addr; > + size_t size; > +}; > + > +struct tee_rproc_context { > + struct list_head sessions; > + struct tee_context *tee_ctx; > + struct device *dev; > +}; > + > +static struct tee_rproc_context *tee_rproc_ctx; > + > +static void prepare_args(struct tee_rproc *trproc, int cmd, struct tee_ioctl_invoke_arg *arg, > + struct tee_param *param, unsigned int num_params) > +{ > + memset(arg, 0, sizeof(*arg)); > + memset(param, 0, MAX_TEE_PARAM_ARRY_MEMBER * sizeof(*param)); > + > + arg->func = cmd; > + arg->session = trproc->session_id; > + arg->num_params = num_params + 1; > + > + param[0] = (struct tee_param) { > + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, > + .u.value.a = trproc->rproc_id, > + }; > +} > + > +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + struct tee_shm *fw_shm; > + int ret; > + > + fw_shm = tee_shm_register_kernel_buf(tee_rproc_ctx->tee_ctx, (void *)fw->data, fw->size); > + if (IS_ERR(fw_shm)) > + return PTR_ERR(fw_shm); > + > + prepare_args(trproc, TA_RPROC_FW_CMD_LOAD_FW, &arg, param, 1); > + > + /* Provide the address of the firmware image */ > + param[1] = (struct tee_param) { > + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT, > + .u.memref = { > + .shm = fw_shm, > + .size = fw->size, > + .shm_offs = 0, > + }, > + }; > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_LOAD_FW invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + if (!ret) > + ret = -EIO; > + } > + > + tee_shm_free(fw_shm); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_load_fw); > + > +int rproc_tee_get_rsc_table(struct tee_rproc *trproc) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + struct rproc *rproc = trproc->rproc; > + size_t rsc_size; > + int ret; > + > + prepare_args(trproc, TA_RPROC_FW_CMD_GET_RSC_TABLE, &arg, param, 2); > + > + param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; > + param[2].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_GET_RSC_TABLE invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + return -EIO; > + } > + > + rsc_size = param[2].u.value.a; > + > + /* If the size is null no resource table defined in the image */ > + if (!rsc_size) > + return 0; > + > + /* Store the resource table address that would be updated by the remote core . */ > + trproc->rsc_va = ioremap_wc(param[1].u.value.a, rsc_size); > + if (IS_ERR_OR_NULL(trproc->rsc_va)) { > + dev_err(tee_rproc_ctx->dev, "Unable to map memory region: %lld+%zx\n", > + param[1].u.value.a, rsc_size); > + trproc->rsc_va = NULL; > + return -ENOMEM; > + } > + > + /* > + * A cached table is requested as the physical address is not mapped yet > + * but remoteproc needs to parse the table for resources. > + */ > + rproc->cached_table = kmemdup((__force void *)trproc->rsc_va, rsc_size, GFP_KERNEL); > + if (!rproc->cached_table) > + return -ENOMEM; > + > + rproc->table_ptr = rproc->cached_table; > + rproc->table_sz = rsc_size; > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(rproc_tee_get_rsc_table); > + > +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) > +{ > + return (__force struct resource_table *)trproc->rsc_va; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_get_loaded_rsc_table); > + > +int tee_rproc_start(struct tee_rproc *trproc) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + int ret; > + > + prepare_args(trproc, TA_RPROC_FW_CMD_START_FW, &arg, param, 0); > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_START_FW invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + if (!ret) > + ret = -EIO; > + } > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_start); > + > +int tee_rproc_stop(struct tee_rproc *trproc) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + int ret; > + > + prepare_args(trproc, TA_RPROC_FW_CMD_STOP_FW, &arg, param, 0); > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_STOP_FW invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + if (!ret) > + ret = -EIO; > + } > + if (trproc->rsc_va) > + iounmap(trproc->rsc_va); > + trproc->rsc_va = NULL; > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_stop); > + > +static const struct tee_client_device_id stm32_tee_rproc_id_table[] = { > + {UUID_INIT(0x80a4c275, 0x0a47, 0x4905, > + 0x82, 0x85, 0x14, 0x86, 0xa9, 0x77, 0x1a, 0x08)}, > + {} > +}; > + > +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) > +{ > + struct tee_client_device *rproc_tee_device; This belongs to the TEE subsystem and as such would call it tee_device. > + struct tee_ioctl_open_session_arg sess_arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + struct tee_rproc *trproc; > + int ret; > + > + /* > + * The device is not probed by the TEE bus. We ignore the reason (bus could be not yet > + * probed or service not available in the secure firmware) > + * Assumption here is that the TEE bus is not probed. > + */ > + if (!tee_rproc_ctx) > + return ERR_PTR(-EPROBE_DEFER); > + > + trproc = devm_kzalloc(dev, sizeof(*trproc), GFP_KERNEL); > + if (!trproc) > + return ERR_PTR(-ENOMEM); > + > + rproc_tee_device = to_tee_client_device(tee_rproc_ctx->dev); > + memset(&sess_arg, 0, sizeof(sess_arg)); > + > + /* Open session with rproc_tee load the OP-TEE Trusted Application */ > + memcpy(sess_arg.uuid, rproc_tee_device->id.uuid.b, TEE_IOCTL_UUID_LEN); > + > + sess_arg.clnt_login = TEE_IOCTL_LOGIN_REE_KERNEL; > + sess_arg.num_params = 1; > + > + param[0] = (struct tee_param) { > + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, > + .u.value.a = rproc_id, > + }; > + > + ret = tee_client_open_session(tee_rproc_ctx->tee_ctx, &sess_arg, param); > + if (ret < 0 || sess_arg.ret != 0) { > + dev_err(dev, "tee_client_open_session failed, err: %x\n", sess_arg.ret); > + return ERR_PTR(-EINVAL); > + } > + > + trproc->parent = dev; > + trproc->rproc_id = rproc_id; > + trproc->session_id = sess_arg.session; > + > + list_add_tail(&trproc->node, &tee_rproc_ctx->sessions); > + > + return trproc; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_register); > + > +int tee_rproc_unregister(struct tee_rproc *trproc) > +{ > + int ret; > + > + if (!tee_rproc_ctx) > + return -ENODEV; > + > + ret = tee_client_close_session(tee_rproc_ctx->tee_ctx, trproc->session_id); > + if (ret < 0) > + dev_err(trproc->parent, "tee_client_close_session failed, err: %x\n", ret); > + > + list_del(&trproc->node); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_unregister); > + > +static int tee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) tee_rproc_ctx_match() > +{ > + /* Today we support only the OP-TEE, could be extend to other tees */ > + return (ver->impl_id == TEE_IMPL_ID_OPTEE); > +} > + > +static int tee_rproc_probe(struct device *dev) > +{ > + struct tee_context *tee_ctx; > + int ret; > + > + /* Only one RPROC OP-TEE device allowed */ > + if (tee_rproc_ctx) { > + dev_err(dev, "An RPROC OP-TEE device was already initialized: only one allowed\n"); > + return -EBUSY; > + } > + > + /* Open context with TEE driver */ > + tee_ctx = tee_client_open_context(NULL, tee_ctx_match, NULL, NULL); > + if (IS_ERR(tee_ctx)) > + return PTR_ERR(tee_ctx); > + > + tee_rproc_ctx = devm_kzalloc(dev, sizeof(*tee_ctx), GFP_KERNEL); > + if (!tee_ctx) { There is a big problem here... More comments on Monday. Thanks, Mathieu > + ret = -ENOMEM; > + goto err; > + } > + > + tee_rproc_ctx->dev = dev; > + tee_rproc_ctx->tee_ctx = tee_ctx; > + INIT_LIST_HEAD(&tee_rproc_ctx->sessions); > + > + return 0; > +err: > + tee_client_close_context(tee_ctx); > + > + return ret; > +} > + > +static int tee_rproc_remove(struct device *dev) > +{ > + struct tee_rproc *entry, *tmp; > + > + list_for_each_entry_safe(entry, tmp, &tee_rproc_ctx->sessions, node) { > + tee_client_close_session(tee_rproc_ctx->tee_ctx, entry->session_id); > + list_del(&entry->node); > + kfree(entry); > + } > + > + tee_client_close_context(tee_rproc_ctx->tee_ctx); > + > + return 0; > +} > + > +MODULE_DEVICE_TABLE(tee, stm32_tee_rproc_id_table); > + > +static struct tee_client_driver tee_rproc_fw_driver = { > + .id_table = stm32_tee_rproc_id_table, > + .driver = { > + .name = KBUILD_MODNAME, > + .bus = &tee_bus_type, > + .probe = tee_rproc_probe, > + .remove = tee_rproc_remove, > + }, > +}; > + > +static int __init tee_rproc_fw_mod_init(void) > +{ > + return driver_register(&tee_rproc_fw_driver.driver); > +} > + > +static void __exit tee_rproc_fw_mod_exit(void) > +{ > + driver_unregister(&tee_rproc_fw_driver.driver); > +} > + > +module_init(tee_rproc_fw_mod_init); > +module_exit(tee_rproc_fw_mod_exit); > + > +MODULE_DESCRIPTION(" TEE remote processor control driver"); > +MODULE_LICENSE("GPL"); > diff --git a/include/linux/tee_remoteproc.h b/include/linux/tee_remoteproc.h > new file mode 100644 > index 000000000000..537d6dc3b858 > --- /dev/null > +++ b/include/linux/tee_remoteproc.h > @@ -0,0 +1,99 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* > + * Copyright(c) 2023 STMicroelectronics - All Rights Reserved > + */ > + > +#ifndef TEE_REMOTEPROC_H > +#define TEE_REMOTEPROC_H > + > +#include <linux/remoteproc.h> > +#include <linux/tee_drv.h> > + > +/** > + * struct tee_rproc - TEE remoteproc structure > + * @node: Reference in list > + * @rproc: Remoteproc reference > + * @parent: Parent device > + * @rproc_id: Identifier of the target firmware > + * @session_id: TEE session identifier > + * @rsc_va: Resource table virtual address. > + */ > +struct tee_rproc { > + struct list_head node; > + struct rproc *rproc; > + struct device *parent; > + u32 rproc_id; > + u32 session_id; > + void __iomem *rsc_va; > +}; > + > +#if IS_ENABLED(CONFIG_TEE_REMOTEPROC) > + > +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id); > +int tee_rproc_unregister(struct tee_rproc *trproc); > + > +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw); > +int rproc_tee_get_rsc_table(struct tee_rproc *trproc); > +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc); > +int tee_rproc_start(struct tee_rproc *trproc); > +int tee_rproc_stop(struct tee_rproc *trproc); > + > +#else > + > +static inline struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) > +{ > + return ERR_PTR(-ENODEV); > +} > + > +static inline int tee_rproc_unregister(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int tee_rproc_load_fw(struct tee_rproc *trproc, > + const struct firmware *fw) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int tee_rproc_start(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int tee_rproc_stop(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int rproc_tee_get_rsc_table(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline struct resource_table * > + tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return NULL; > +} > + > +#endif /* CONFIG_TEE_REMOTEPROC */ > +#endif /* TEE_REMOTEPROC_H */ > -- > 2.25.1 >
On Thu, Jan 18, 2024 at 11:04:30AM +0100, Arnaud Pouliquen wrote: > From: Arnaud Pouliquen <arnaud.pouliquen@st.com> > > Add a remoteproc TEE (Trusted Execution Environment) device > that will be probed by the TEE bus. If the associated Trusted > application is supported on secure part this device offers a client > interface to load a firmware in the secure part. > This firmware could be authenticated and decrypted by the secure > trusted application. > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> > --- > drivers/remoteproc/Kconfig | 9 + > drivers/remoteproc/Makefile | 1 + > drivers/remoteproc/tee_remoteproc.c | 393 ++++++++++++++++++++++++++++ > include/linux/tee_remoteproc.h | 99 +++++++ > 4 files changed, 502 insertions(+) > create mode 100644 drivers/remoteproc/tee_remoteproc.c > create mode 100644 include/linux/tee_remoteproc.h > > diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig > index 48845dc8fa85..85299606806c 100644 > --- a/drivers/remoteproc/Kconfig > +++ b/drivers/remoteproc/Kconfig > @@ -365,6 +365,15 @@ config XLNX_R5_REMOTEPROC > > It's safe to say N if not interested in using RPU r5f cores. > > + > +config TEE_REMOTEPROC > + tristate "trusted firmware support by a TEE application" > + depends on OPTEE > + help > + Support for trusted remote processors firmware. The firmware > + authentication and/or decryption are managed by a trusted application. > + This can be either built-in or a loadable module. > + > endif # REMOTEPROC > > endmenu > diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile > index 91314a9b43ce..fa8daebce277 100644 > --- a/drivers/remoteproc/Makefile > +++ b/drivers/remoteproc/Makefile > @@ -36,6 +36,7 @@ obj-$(CONFIG_RCAR_REMOTEPROC) += rcar_rproc.o > obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o > obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o > obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o > +obj-$(CONFIG_TEE_REMOTEPROC) += tee_remoteproc.o > obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o > obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o > obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o > diff --git a/drivers/remoteproc/tee_remoteproc.c b/drivers/remoteproc/tee_remoteproc.c > new file mode 100644 > index 000000000000..49e1e0caf889 > --- /dev/null > +++ b/drivers/remoteproc/tee_remoteproc.c > @@ -0,0 +1,393 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright (C) STMicroelectronics 2023 - All Rights Reserved > + * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com> > + */ > + > +#include <linux/firmware.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/of_address.h> > +#include <linux/of_device.h> > +#include <linux/of_reserved_mem.h> > +#include <linux/remoteproc.h> > +#include <linux/slab.h> > +#include <linux/tee_drv.h> > +#include <linux/tee_remoteproc.h> > + > +#include "remoteproc_internal.h" > + > +#define MAX_TEE_PARAM_ARRY_MEMBER 4 > + > +/* > + * Authentication of the firmware and load in the remote processor memory > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + * [in] params[1].memref: buffer containing the image of the buffer > + */ > +#define TA_RPROC_FW_CMD_LOAD_FW 1 > + > +/* > + * Start the remote processor > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + */ > +#define TA_RPROC_FW_CMD_START_FW 2 > + > +/* > + * Stop the remote processor > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + */ > +#define TA_RPROC_FW_CMD_STOP_FW 3 > + > +/* > + * Return the address of the resource table, or 0 if not found > + * No check is done to verify that the address returned is accessible by > + * the non secure context. If the resource table is loaded in a protected > + * memory the access by the non secure context will lead to a data abort. > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + * [out] params[1].value.a: 32bit LSB resource table memory address > + * [out] params[1].value.b: 32bit MSB resource table memory address > + * [out] params[2].value.a: 32bit LSB resource table memory size > + * [out] params[2].value.b: 32bit MSB resource table memory size > + */ > +#define TA_RPROC_FW_CMD_GET_RSC_TABLE 4 > + > +/* > + * Return the address of the core dump > + * > + * [in] params[0].value.a: unique 32bit identifier of the remote processor > + * [out] params[1].memref: address of the core dump image if exist, > + * else return Null > + */ > +#define TA_RPROC_FW_CMD_GET_COREDUMP 5 > + > +struct tee_rproc_mem { > + char name[20]; > + void __iomem *cpu_addr; > + phys_addr_t bus_addr; > + u32 dev_addr; > + size_t size; > +}; > + > +struct tee_rproc_context { > + struct list_head sessions; > + struct tee_context *tee_ctx; > + struct device *dev; > +}; > + > +static struct tee_rproc_context *tee_rproc_ctx; > + > +static void prepare_args(struct tee_rproc *trproc, int cmd, struct tee_ioctl_invoke_arg *arg, > + struct tee_param *param, unsigned int num_params) > +{ > + memset(arg, 0, sizeof(*arg)); > + memset(param, 0, MAX_TEE_PARAM_ARRY_MEMBER * sizeof(*param)); > + > + arg->func = cmd; > + arg->session = trproc->session_id; > + arg->num_params = num_params + 1; > + > + param[0] = (struct tee_param) { > + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, > + .u.value.a = trproc->rproc_id, > + }; > +} > + > +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + struct tee_shm *fw_shm; > + int ret; > + > + fw_shm = tee_shm_register_kernel_buf(tee_rproc_ctx->tee_ctx, (void *)fw->data, fw->size); > + if (IS_ERR(fw_shm)) > + return PTR_ERR(fw_shm); > + > + prepare_args(trproc, TA_RPROC_FW_CMD_LOAD_FW, &arg, param, 1); > + > + /* Provide the address of the firmware image */ > + param[1] = (struct tee_param) { > + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT, > + .u.memref = { > + .shm = fw_shm, > + .size = fw->size, > + .shm_offs = 0, > + }, > + }; > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_LOAD_FW invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + if (!ret) > + ret = -EIO; > + } > + > + tee_shm_free(fw_shm); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_load_fw); > + > +int rproc_tee_get_rsc_table(struct tee_rproc *trproc) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + struct rproc *rproc = trproc->rproc; > + size_t rsc_size; > + int ret; > + > + prepare_args(trproc, TA_RPROC_FW_CMD_GET_RSC_TABLE, &arg, param, 2); > + > + param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; > + param[2].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_GET_RSC_TABLE invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + return -EIO; > + } > + > + rsc_size = param[2].u.value.a; > + > + /* If the size is null no resource table defined in the image */ > + if (!rsc_size) > + return 0; > + > + /* Store the resource table address that would be updated by the remote core . */ > + trproc->rsc_va = ioremap_wc(param[1].u.value.a, rsc_size); > + if (IS_ERR_OR_NULL(trproc->rsc_va)) { > + dev_err(tee_rproc_ctx->dev, "Unable to map memory region: %lld+%zx\n", > + param[1].u.value.a, rsc_size); > + trproc->rsc_va = NULL; > + return -ENOMEM; > + } > + > + /* > + * A cached table is requested as the physical address is not mapped yet > + * but remoteproc needs to parse the table for resources. > + */ > + rproc->cached_table = kmemdup((__force void *)trproc->rsc_va, rsc_size, GFP_KERNEL); > + if (!rproc->cached_table) > + return -ENOMEM; > + > + rproc->table_ptr = rproc->cached_table; > + rproc->table_sz = rsc_size; > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(rproc_tee_get_rsc_table); > + > +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) Please change this to tee_rproc_find_loaded_rsc_table(). That way we know it should be correlated with ops::find_loaded_rsc_table() rather than ops::get_loaded_rsc_table(). > +{ > + return (__force struct resource_table *)trproc->rsc_va; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_get_loaded_rsc_table); > + > +int tee_rproc_start(struct tee_rproc *trproc) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + int ret; > + > + prepare_args(trproc, TA_RPROC_FW_CMD_START_FW, &arg, param, 0); > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { Please split the conditions of this if() statement to make it easier to understand the correlation with the other if() below. Same for tee_rproc_stop(). > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_START_FW invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + if (!ret) > + ret = -EIO; > + } > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_start); > + > +int tee_rproc_stop(struct tee_rproc *trproc) > +{ > + struct tee_ioctl_invoke_arg arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + int ret; > + > + prepare_args(trproc, TA_RPROC_FW_CMD_STOP_FW, &arg, param, 0); > + > + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); > + if (ret < 0 || arg.ret != 0) { > + dev_err(tee_rproc_ctx->dev, > + "TA_RPROC_FW_CMD_STOP_FW invoke failed TEE err: %x, ret:%x\n", > + arg.ret, ret); > + if (!ret) > + ret = -EIO; > + } > + if (trproc->rsc_va) > + iounmap(trproc->rsc_va); > + trproc->rsc_va = NULL; > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_stop); > + > +static const struct tee_client_device_id stm32_tee_rproc_id_table[] = { > + {UUID_INIT(0x80a4c275, 0x0a47, 0x4905, > + 0x82, 0x85, 0x14, 0x86, 0xa9, 0x77, 0x1a, 0x08)}, > + {} > +}; > + > +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) > +{ > + struct tee_client_device *rproc_tee_device; > + struct tee_ioctl_open_session_arg sess_arg; > + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; > + struct tee_rproc *trproc; > + int ret; > + > + /* > + * The device is not probed by the TEE bus. We ignore the reason (bus could be not yet > + * probed or service not available in the secure firmware) > + * Assumption here is that the TEE bus is not probed. > + */ > + if (!tee_rproc_ctx) > + return ERR_PTR(-EPROBE_DEFER); > + > + trproc = devm_kzalloc(dev, sizeof(*trproc), GFP_KERNEL); > + if (!trproc) > + return ERR_PTR(-ENOMEM); > + > + rproc_tee_device = to_tee_client_device(tee_rproc_ctx->dev); > + memset(&sess_arg, 0, sizeof(sess_arg)); > + > + /* Open session with rproc_tee load the OP-TEE Trusted Application */ > + memcpy(sess_arg.uuid, rproc_tee_device->id.uuid.b, TEE_IOCTL_UUID_LEN); > + > + sess_arg.clnt_login = TEE_IOCTL_LOGIN_REE_KERNEL; > + sess_arg.num_params = 1; > + > + param[0] = (struct tee_param) { > + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, > + .u.value.a = rproc_id, > + }; > + > + ret = tee_client_open_session(tee_rproc_ctx->tee_ctx, &sess_arg, param); > + if (ret < 0 || sess_arg.ret != 0) { > + dev_err(dev, "tee_client_open_session failed, err: %x\n", sess_arg.ret); > + return ERR_PTR(-EINVAL); > + } > + > + trproc->parent = dev; > + trproc->rproc_id = rproc_id; > + trproc->session_id = sess_arg.session; > + > + list_add_tail(&trproc->node, &tee_rproc_ctx->sessions); > + > + return trproc; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_register); > + > +int tee_rproc_unregister(struct tee_rproc *trproc) > +{ > + int ret; > + > + if (!tee_rproc_ctx) > + return -ENODEV; Not sure this check is needed since we can't be here if memory allocation for @tee_rproc_ctx failed in tee_rproc_probe(). > + > + ret = tee_client_close_session(tee_rproc_ctx->tee_ctx, trproc->session_id); > + if (ret < 0) > + dev_err(trproc->parent, "tee_client_close_session failed, err: %x\n", ret); > + > + list_del(&trproc->node); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(tee_rproc_unregister); > + > +static int tee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) > +{ > + /* Today we support only the OP-TEE, could be extend to other tees */ > + return (ver->impl_id == TEE_IMPL_ID_OPTEE); > +} > + > +static int tee_rproc_probe(struct device *dev) > +{ > + struct tee_context *tee_ctx; > + int ret; > + > + /* Only one RPROC OP-TEE device allowed */ > + if (tee_rproc_ctx) { > + dev_err(dev, "An RPROC OP-TEE device was already initialized: only one allowed\n"); > + return -EBUSY; > + } Is this check needed? How can @tee_rproc_ctx be initialized twice? More comments tomorrow. Thanks, Mathieu > + > + /* Open context with TEE driver */ > + tee_ctx = tee_client_open_context(NULL, tee_ctx_match, NULL, NULL); > + if (IS_ERR(tee_ctx)) > + return PTR_ERR(tee_ctx); > + > + tee_rproc_ctx = devm_kzalloc(dev, sizeof(*tee_ctx), GFP_KERNEL); > + if (!tee_ctx) { > + ret = -ENOMEM; > + goto err; > + } > + > + tee_rproc_ctx->dev = dev; > + tee_rproc_ctx->tee_ctx = tee_ctx; > + INIT_LIST_HEAD(&tee_rproc_ctx->sessions); > + > + return 0; > +err: > + tee_client_close_context(tee_ctx); > + > + return ret; > +} > + > +static int tee_rproc_remove(struct device *dev) > +{ > + struct tee_rproc *entry, *tmp; > + > + list_for_each_entry_safe(entry, tmp, &tee_rproc_ctx->sessions, node) { > + tee_client_close_session(tee_rproc_ctx->tee_ctx, entry->session_id); > + list_del(&entry->node); > + kfree(entry); > + } > + > + tee_client_close_context(tee_rproc_ctx->tee_ctx); > + > + return 0; > +} > + > +MODULE_DEVICE_TABLE(tee, stm32_tee_rproc_id_table); > + > +static struct tee_client_driver tee_rproc_fw_driver = { > + .id_table = stm32_tee_rproc_id_table, > + .driver = { > + .name = KBUILD_MODNAME, > + .bus = &tee_bus_type, > + .probe = tee_rproc_probe, > + .remove = tee_rproc_remove, > + }, > +}; > + > +static int __init tee_rproc_fw_mod_init(void) > +{ > + return driver_register(&tee_rproc_fw_driver.driver); > +} > + > +static void __exit tee_rproc_fw_mod_exit(void) > +{ > + driver_unregister(&tee_rproc_fw_driver.driver); > +} > + > +module_init(tee_rproc_fw_mod_init); > +module_exit(tee_rproc_fw_mod_exit); > + > +MODULE_DESCRIPTION(" TEE remote processor control driver"); > +MODULE_LICENSE("GPL"); > diff --git a/include/linux/tee_remoteproc.h b/include/linux/tee_remoteproc.h > new file mode 100644 > index 000000000000..537d6dc3b858 > --- /dev/null > +++ b/include/linux/tee_remoteproc.h > @@ -0,0 +1,99 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* > + * Copyright(c) 2023 STMicroelectronics - All Rights Reserved > + */ > + > +#ifndef TEE_REMOTEPROC_H > +#define TEE_REMOTEPROC_H > + > +#include <linux/remoteproc.h> > +#include <linux/tee_drv.h> > + > +/** > + * struct tee_rproc - TEE remoteproc structure > + * @node: Reference in list > + * @rproc: Remoteproc reference > + * @parent: Parent device > + * @rproc_id: Identifier of the target firmware > + * @session_id: TEE session identifier > + * @rsc_va: Resource table virtual address. > + */ > +struct tee_rproc { > + struct list_head node; > + struct rproc *rproc; > + struct device *parent; > + u32 rproc_id; > + u32 session_id; > + void __iomem *rsc_va; > +}; > + > +#if IS_ENABLED(CONFIG_TEE_REMOTEPROC) > + > +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id); > +int tee_rproc_unregister(struct tee_rproc *trproc); > + > +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw); > +int rproc_tee_get_rsc_table(struct tee_rproc *trproc); > +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc); > +int tee_rproc_start(struct tee_rproc *trproc); > +int tee_rproc_stop(struct tee_rproc *trproc); > + > +#else > + > +static inline struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) > +{ > + return ERR_PTR(-ENODEV); > +} > + > +static inline int tee_rproc_unregister(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int tee_rproc_load_fw(struct tee_rproc *trproc, > + const struct firmware *fw) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int tee_rproc_start(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int tee_rproc_stop(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline int rproc_tee_get_rsc_table(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return 0; > +} > + > +static inline struct resource_table * > + tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) > +{ > + /* This shouldn't be possible */ > + WARN_ON(1); > + > + return NULL; > +} > + > +#endif /* CONFIG_TEE_REMOTEPROC */ > +#endif /* TEE_REMOTEPROC_H */ > -- > 2.25.1 >
On 1/29/24 19:55, Mathieu Poirier wrote: > On Thu, Jan 18, 2024 at 11:04:30AM +0100, Arnaud Pouliquen wrote: >> From: Arnaud Pouliquen <arnaud.pouliquen@st.com> >> >> Add a remoteproc TEE (Trusted Execution Environment) device >> that will be probed by the TEE bus. If the associated Trusted >> application is supported on secure part this device offers a client >> interface to load a firmware in the secure part. >> This firmware could be authenticated and decrypted by the secure >> trusted application. >> >> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> >> --- >> drivers/remoteproc/Kconfig | 9 + >> drivers/remoteproc/Makefile | 1 + >> drivers/remoteproc/tee_remoteproc.c | 393 ++++++++++++++++++++++++++++ >> include/linux/tee_remoteproc.h | 99 +++++++ >> 4 files changed, 502 insertions(+) >> create mode 100644 drivers/remoteproc/tee_remoteproc.c >> create mode 100644 include/linux/tee_remoteproc.h >> >> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig >> index 48845dc8fa85..85299606806c 100644 >> --- a/drivers/remoteproc/Kconfig >> +++ b/drivers/remoteproc/Kconfig >> @@ -365,6 +365,15 @@ config XLNX_R5_REMOTEPROC >> >> It's safe to say N if not interested in using RPU r5f cores. >> >> + >> +config TEE_REMOTEPROC >> + tristate "trusted firmware support by a TEE application" >> + depends on OPTEE >> + help >> + Support for trusted remote processors firmware. The firmware >> + authentication and/or decryption are managed by a trusted application. >> + This can be either built-in or a loadable module. >> + >> endif # REMOTEPROC >> >> endmenu >> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile >> index 91314a9b43ce..fa8daebce277 100644 >> --- a/drivers/remoteproc/Makefile >> +++ b/drivers/remoteproc/Makefile >> @@ -36,6 +36,7 @@ obj-$(CONFIG_RCAR_REMOTEPROC) += rcar_rproc.o >> obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o >> obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o >> obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o >> +obj-$(CONFIG_TEE_REMOTEPROC) += tee_remoteproc.o >> obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o >> obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o >> obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o >> diff --git a/drivers/remoteproc/tee_remoteproc.c b/drivers/remoteproc/tee_remoteproc.c >> new file mode 100644 >> index 000000000000..49e1e0caf889 >> --- /dev/null >> +++ b/drivers/remoteproc/tee_remoteproc.c >> @@ -0,0 +1,393 @@ >> +// SPDX-License-Identifier: GPL-2.0-or-later >> +/* >> + * Copyright (C) STMicroelectronics 2023 - All Rights Reserved >> + * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com> >> + */ >> + >> +#include <linux/firmware.h> >> +#include <linux/interrupt.h> >> +#include <linux/io.h> >> +#include <linux/module.h> >> +#include <linux/of_address.h> >> +#include <linux/of_device.h> >> +#include <linux/of_reserved_mem.h> >> +#include <linux/remoteproc.h> >> +#include <linux/slab.h> >> +#include <linux/tee_drv.h> >> +#include <linux/tee_remoteproc.h> >> + >> +#include "remoteproc_internal.h" >> + >> +#define MAX_TEE_PARAM_ARRY_MEMBER 4 >> + >> +/* >> + * Authentication of the firmware and load in the remote processor memory >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + * [in] params[1].memref: buffer containing the image of the buffer >> + */ >> +#define TA_RPROC_FW_CMD_LOAD_FW 1 >> + >> +/* >> + * Start the remote processor >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + */ >> +#define TA_RPROC_FW_CMD_START_FW 2 >> + >> +/* >> + * Stop the remote processor >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + */ >> +#define TA_RPROC_FW_CMD_STOP_FW 3 >> + >> +/* >> + * Return the address of the resource table, or 0 if not found >> + * No check is done to verify that the address returned is accessible by >> + * the non secure context. If the resource table is loaded in a protected >> + * memory the access by the non secure context will lead to a data abort. >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + * [out] params[1].value.a: 32bit LSB resource table memory address >> + * [out] params[1].value.b: 32bit MSB resource table memory address >> + * [out] params[2].value.a: 32bit LSB resource table memory size >> + * [out] params[2].value.b: 32bit MSB resource table memory size >> + */ >> +#define TA_RPROC_FW_CMD_GET_RSC_TABLE 4 >> + >> +/* >> + * Return the address of the core dump >> + * >> + * [in] params[0].value.a: unique 32bit identifier of the remote processor >> + * [out] params[1].memref: address of the core dump image if exist, >> + * else return Null >> + */ >> +#define TA_RPROC_FW_CMD_GET_COREDUMP 5 >> + >> +struct tee_rproc_mem { >> + char name[20]; >> + void __iomem *cpu_addr; >> + phys_addr_t bus_addr; >> + u32 dev_addr; >> + size_t size; >> +}; >> + >> +struct tee_rproc_context { >> + struct list_head sessions; >> + struct tee_context *tee_ctx; >> + struct device *dev; >> +}; >> + >> +static struct tee_rproc_context *tee_rproc_ctx; >> + >> +static void prepare_args(struct tee_rproc *trproc, int cmd, struct tee_ioctl_invoke_arg *arg, >> + struct tee_param *param, unsigned int num_params) >> +{ >> + memset(arg, 0, sizeof(*arg)); >> + memset(param, 0, MAX_TEE_PARAM_ARRY_MEMBER * sizeof(*param)); >> + >> + arg->func = cmd; >> + arg->session = trproc->session_id; >> + arg->num_params = num_params + 1; >> + >> + param[0] = (struct tee_param) { >> + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, >> + .u.value.a = trproc->rproc_id, >> + }; >> +} >> + >> +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw) >> +{ >> + struct tee_ioctl_invoke_arg arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + struct tee_shm *fw_shm; >> + int ret; >> + >> + fw_shm = tee_shm_register_kernel_buf(tee_rproc_ctx->tee_ctx, (void *)fw->data, fw->size); >> + if (IS_ERR(fw_shm)) >> + return PTR_ERR(fw_shm); >> + >> + prepare_args(trproc, TA_RPROC_FW_CMD_LOAD_FW, &arg, param, 1); >> + >> + /* Provide the address of the firmware image */ >> + param[1] = (struct tee_param) { >> + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT, >> + .u.memref = { >> + .shm = fw_shm, >> + .size = fw->size, >> + .shm_offs = 0, >> + }, >> + }; >> + >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); >> + if (ret < 0 || arg.ret != 0) { >> + dev_err(tee_rproc_ctx->dev, >> + "TA_RPROC_FW_CMD_LOAD_FW invoke failed TEE err: %x, ret:%x\n", >> + arg.ret, ret); >> + if (!ret) >> + ret = -EIO; >> + } >> + >> + tee_shm_free(fw_shm); >> + >> + return ret; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_load_fw); >> + >> +int rproc_tee_get_rsc_table(struct tee_rproc *trproc) >> +{ >> + struct tee_ioctl_invoke_arg arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + struct rproc *rproc = trproc->rproc; >> + size_t rsc_size; >> + int ret; >> + >> + prepare_args(trproc, TA_RPROC_FW_CMD_GET_RSC_TABLE, &arg, param, 2); >> + >> + param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; >> + param[2].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; >> + >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); >> + if (ret < 0 || arg.ret != 0) { >> + dev_err(tee_rproc_ctx->dev, >> + "TA_RPROC_FW_CMD_GET_RSC_TABLE invoke failed TEE err: %x, ret:%x\n", >> + arg.ret, ret); >> + return -EIO; >> + } >> + >> + rsc_size = param[2].u.value.a; >> + >> + /* If the size is null no resource table defined in the image */ >> + if (!rsc_size) >> + return 0; >> + >> + /* Store the resource table address that would be updated by the remote core . */ >> + trproc->rsc_va = ioremap_wc(param[1].u.value.a, rsc_size); >> + if (IS_ERR_OR_NULL(trproc->rsc_va)) { >> + dev_err(tee_rproc_ctx->dev, "Unable to map memory region: %lld+%zx\n", >> + param[1].u.value.a, rsc_size); >> + trproc->rsc_va = NULL; >> + return -ENOMEM; >> + } >> + >> + /* >> + * A cached table is requested as the physical address is not mapped yet >> + * but remoteproc needs to parse the table for resources. >> + */ >> + rproc->cached_table = kmemdup((__force void *)trproc->rsc_va, rsc_size, GFP_KERNEL); >> + if (!rproc->cached_table) >> + return -ENOMEM; >> + >> + rproc->table_ptr = rproc->cached_table; >> + rproc->table_sz = rsc_size; >> + >> + return 0; >> +} >> +EXPORT_SYMBOL_GPL(rproc_tee_get_rsc_table); >> + >> +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) > > Please change this to tee_rproc_find_loaded_rsc_table(). That way we know it > should be correlated with ops::find_loaded_rsc_table() rather than > ops::get_loaded_rsc_table(). > >> +{ >> + return (__force struct resource_table *)trproc->rsc_va; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_get_loaded_rsc_table); >> + >> +int tee_rproc_start(struct tee_rproc *trproc) >> +{ >> + struct tee_ioctl_invoke_arg arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + int ret; >> + >> + prepare_args(trproc, TA_RPROC_FW_CMD_START_FW, &arg, param, 0); >> + >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); >> + if (ret < 0 || arg.ret != 0) { > > Please split the conditions of this if() statement to make it easier to understand > the correlation with the other if() below. Same for tee_rproc_stop(). Regarding other references to tee_client_invoke_func(), it is the common way to test the returns. If it is okay for you I would prefer to keep this implementation > >> + dev_err(tee_rproc_ctx->dev, >> + "TA_RPROC_FW_CMD_START_FW invoke failed TEE err: %x, ret:%x\n", >> + arg.ret, ret); >> + if (!ret) >> + ret = -EIO; >> + } >> + >> + return ret; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_start); >> + >> +int tee_rproc_stop(struct tee_rproc *trproc) >> +{ >> + struct tee_ioctl_invoke_arg arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + int ret; >> + >> + prepare_args(trproc, TA_RPROC_FW_CMD_STOP_FW, &arg, param, 0); >> + >> + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); >> + if (ret < 0 || arg.ret != 0) { >> + dev_err(tee_rproc_ctx->dev, >> + "TA_RPROC_FW_CMD_STOP_FW invoke failed TEE err: %x, ret:%x\n", >> + arg.ret, ret); >> + if (!ret) >> + ret = -EIO; >> + } >> + if (trproc->rsc_va) >> + iounmap(trproc->rsc_va); >> + trproc->rsc_va = NULL; >> + >> + return ret; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_stop); >> + >> +static const struct tee_client_device_id stm32_tee_rproc_id_table[] = { >> + {UUID_INIT(0x80a4c275, 0x0a47, 0x4905, >> + 0x82, 0x85, 0x14, 0x86, 0xa9, 0x77, 0x1a, 0x08)}, >> + {} >> +}; >> + >> +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) >> +{ >> + struct tee_client_device *rproc_tee_device; >> + struct tee_ioctl_open_session_arg sess_arg; >> + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; >> + struct tee_rproc *trproc; >> + int ret; >> + >> + /* >> + * The device is not probed by the TEE bus. We ignore the reason (bus could be not yet >> + * probed or service not available in the secure firmware) >> + * Assumption here is that the TEE bus is not probed. >> + */ >> + if (!tee_rproc_ctx) >> + return ERR_PTR(-EPROBE_DEFER); >> + >> + trproc = devm_kzalloc(dev, sizeof(*trproc), GFP_KERNEL); >> + if (!trproc) >> + return ERR_PTR(-ENOMEM); >> + >> + rproc_tee_device = to_tee_client_device(tee_rproc_ctx->dev); >> + memset(&sess_arg, 0, sizeof(sess_arg)); >> + >> + /* Open session with rproc_tee load the OP-TEE Trusted Application */ >> + memcpy(sess_arg.uuid, rproc_tee_device->id.uuid.b, TEE_IOCTL_UUID_LEN); >> + >> + sess_arg.clnt_login = TEE_IOCTL_LOGIN_REE_KERNEL; >> + sess_arg.num_params = 1; >> + >> + param[0] = (struct tee_param) { >> + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, >> + .u.value.a = rproc_id, >> + }; >> + >> + ret = tee_client_open_session(tee_rproc_ctx->tee_ctx, &sess_arg, param); >> + if (ret < 0 || sess_arg.ret != 0) { >> + dev_err(dev, "tee_client_open_session failed, err: %x\n", sess_arg.ret); >> + return ERR_PTR(-EINVAL); >> + } >> + >> + trproc->parent = dev; >> + trproc->rproc_id = rproc_id; >> + trproc->session_id = sess_arg.session; >> + >> + list_add_tail(&trproc->node, &tee_rproc_ctx->sessions); >> + >> + return trproc; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_register); >> + >> +int tee_rproc_unregister(struct tee_rproc *trproc) >> +{ >> + int ret; >> + >> + if (!tee_rproc_ctx) >> + return -ENODEV; > > Not sure this check is needed since we can't be here if memory allocation for > @tee_rproc_ctx failed in tee_rproc_probe(). > >> + >> + ret = tee_client_close_session(tee_rproc_ctx->tee_ctx, trproc->session_id); >> + if (ret < 0) >> + dev_err(trproc->parent, "tee_client_close_session failed, err: %x\n", ret); >> + >> + list_del(&trproc->node); >> + >> + return ret; >> +} >> +EXPORT_SYMBOL_GPL(tee_rproc_unregister); >> + >> +static int tee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) >> +{ >> + /* Today we support only the OP-TEE, could be extend to other tees */ >> + return (ver->impl_id == TEE_IMPL_ID_OPTEE); >> +} >> + >> +static int tee_rproc_probe(struct device *dev) >> +{ >> + struct tee_context *tee_ctx; >> + int ret; >> + >> + /* Only one RPROC OP-TEE device allowed */ >> + if (tee_rproc_ctx) { >> + dev_err(dev, "An RPROC OP-TEE device was already initialized: only one allowed\n"); >> + return -EBUSY; >> + } > > Is this check needed? How can @tee_rproc_ctx be initialized twice? Right, this kind of check makes sense in OP-TEE, here it is probably over check. I will clean it. Thanks, Arnaud > > More comments tomorrow. > > Thanks, > Mathieu > >> + >> + /* Open context with TEE driver */ >> + tee_ctx = tee_client_open_context(NULL, tee_ctx_match, NULL, NULL); >> + if (IS_ERR(tee_ctx)) >> + return PTR_ERR(tee_ctx); >> + >> + tee_rproc_ctx = devm_kzalloc(dev, sizeof(*tee_ctx), GFP_KERNEL); >> + if (!tee_ctx) { >> + ret = -ENOMEM; >> + goto err; >> + } >> + >> + tee_rproc_ctx->dev = dev; >> + tee_rproc_ctx->tee_ctx = tee_ctx; >> + INIT_LIST_HEAD(&tee_rproc_ctx->sessions); >> + >> + return 0; >> +err: >> + tee_client_close_context(tee_ctx); >> + >> + return ret; >> +} >> + >> +static int tee_rproc_remove(struct device *dev) >> +{ >> + struct tee_rproc *entry, *tmp; >> + >> + list_for_each_entry_safe(entry, tmp, &tee_rproc_ctx->sessions, node) { >> + tee_client_close_session(tee_rproc_ctx->tee_ctx, entry->session_id); >> + list_del(&entry->node); >> + kfree(entry); >> + } >> + >> + tee_client_close_context(tee_rproc_ctx->tee_ctx); >> + >> + return 0; >> +} >> + >> +MODULE_DEVICE_TABLE(tee, stm32_tee_rproc_id_table); >> + >> +static struct tee_client_driver tee_rproc_fw_driver = { >> + .id_table = stm32_tee_rproc_id_table, >> + .driver = { >> + .name = KBUILD_MODNAME, >> + .bus = &tee_bus_type, >> + .probe = tee_rproc_probe, >> + .remove = tee_rproc_remove, >> + }, >> +}; >> + >> +static int __init tee_rproc_fw_mod_init(void) >> +{ >> + return driver_register(&tee_rproc_fw_driver.driver); >> +} >> + >> +static void __exit tee_rproc_fw_mod_exit(void) >> +{ >> + driver_unregister(&tee_rproc_fw_driver.driver); >> +} >> + >> +module_init(tee_rproc_fw_mod_init); >> +module_exit(tee_rproc_fw_mod_exit); >> + >> +MODULE_DESCRIPTION(" TEE remote processor control driver"); >> +MODULE_LICENSE("GPL"); >> diff --git a/include/linux/tee_remoteproc.h b/include/linux/tee_remoteproc.h >> new file mode 100644 >> index 000000000000..537d6dc3b858 >> --- /dev/null >> +++ b/include/linux/tee_remoteproc.h >> @@ -0,0 +1,99 @@ >> +/* SPDX-License-Identifier: GPL-2.0-or-later */ >> +/* >> + * Copyright(c) 2023 STMicroelectronics - All Rights Reserved >> + */ >> + >> +#ifndef TEE_REMOTEPROC_H >> +#define TEE_REMOTEPROC_H >> + >> +#include <linux/remoteproc.h> >> +#include <linux/tee_drv.h> >> + >> +/** >> + * struct tee_rproc - TEE remoteproc structure >> + * @node: Reference in list >> + * @rproc: Remoteproc reference >> + * @parent: Parent device >> + * @rproc_id: Identifier of the target firmware >> + * @session_id: TEE session identifier >> + * @rsc_va: Resource table virtual address. >> + */ >> +struct tee_rproc { >> + struct list_head node; >> + struct rproc *rproc; >> + struct device *parent; >> + u32 rproc_id; >> + u32 session_id; >> + void __iomem *rsc_va; >> +}; >> + >> +#if IS_ENABLED(CONFIG_TEE_REMOTEPROC) >> + >> +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id); >> +int tee_rproc_unregister(struct tee_rproc *trproc); >> + >> +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw); >> +int rproc_tee_get_rsc_table(struct tee_rproc *trproc); >> +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc); >> +int tee_rproc_start(struct tee_rproc *trproc); >> +int tee_rproc_stop(struct tee_rproc *trproc); >> + >> +#else >> + >> +static inline struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) >> +{ >> + return ERR_PTR(-ENODEV); >> +} >> + >> +static inline int tee_rproc_unregister(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline int tee_rproc_load_fw(struct tee_rproc *trproc, >> + const struct firmware *fw) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline int tee_rproc_start(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline int tee_rproc_stop(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline int rproc_tee_get_rsc_table(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return 0; >> +} >> + >> +static inline struct resource_table * >> + tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) >> +{ >> + /* This shouldn't be possible */ >> + WARN_ON(1); >> + >> + return NULL; >> +} >> + >> +#endif /* CONFIG_TEE_REMOTEPROC */ >> +#endif /* TEE_REMOTEPROC_H */ >> -- >> 2.25.1 >>
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index 48845dc8fa85..85299606806c 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -365,6 +365,15 @@ config XLNX_R5_REMOTEPROC It's safe to say N if not interested in using RPU r5f cores. + +config TEE_REMOTEPROC + tristate "trusted firmware support by a TEE application" + depends on OPTEE + help + Support for trusted remote processors firmware. The firmware + authentication and/or decryption are managed by a trusted application. + This can be either built-in or a loadable module. + endif # REMOTEPROC endmenu diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index 91314a9b43ce..fa8daebce277 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_RCAR_REMOTEPROC) += rcar_rproc.o obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o +obj-$(CONFIG_TEE_REMOTEPROC) += tee_remoteproc.o obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o diff --git a/drivers/remoteproc/tee_remoteproc.c b/drivers/remoteproc/tee_remoteproc.c new file mode 100644 index 000000000000..49e1e0caf889 --- /dev/null +++ b/drivers/remoteproc/tee_remoteproc.c @@ -0,0 +1,393 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) STMicroelectronics 2023 - All Rights Reserved + * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com> + */ + +#include <linux/firmware.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/of_reserved_mem.h> +#include <linux/remoteproc.h> +#include <linux/slab.h> +#include <linux/tee_drv.h> +#include <linux/tee_remoteproc.h> + +#include "remoteproc_internal.h" + +#define MAX_TEE_PARAM_ARRY_MEMBER 4 + +/* + * Authentication of the firmware and load in the remote processor memory + * + * [in] params[0].value.a: unique 32bit identifier of the remote processor + * [in] params[1].memref: buffer containing the image of the buffer + */ +#define TA_RPROC_FW_CMD_LOAD_FW 1 + +/* + * Start the remote processor + * + * [in] params[0].value.a: unique 32bit identifier of the remote processor + */ +#define TA_RPROC_FW_CMD_START_FW 2 + +/* + * Stop the remote processor + * + * [in] params[0].value.a: unique 32bit identifier of the remote processor + */ +#define TA_RPROC_FW_CMD_STOP_FW 3 + +/* + * Return the address of the resource table, or 0 if not found + * No check is done to verify that the address returned is accessible by + * the non secure context. If the resource table is loaded in a protected + * memory the access by the non secure context will lead to a data abort. + * + * [in] params[0].value.a: unique 32bit identifier of the remote processor + * [out] params[1].value.a: 32bit LSB resource table memory address + * [out] params[1].value.b: 32bit MSB resource table memory address + * [out] params[2].value.a: 32bit LSB resource table memory size + * [out] params[2].value.b: 32bit MSB resource table memory size + */ +#define TA_RPROC_FW_CMD_GET_RSC_TABLE 4 + +/* + * Return the address of the core dump + * + * [in] params[0].value.a: unique 32bit identifier of the remote processor + * [out] params[1].memref: address of the core dump image if exist, + * else return Null + */ +#define TA_RPROC_FW_CMD_GET_COREDUMP 5 + +struct tee_rproc_mem { + char name[20]; + void __iomem *cpu_addr; + phys_addr_t bus_addr; + u32 dev_addr; + size_t size; +}; + +struct tee_rproc_context { + struct list_head sessions; + struct tee_context *tee_ctx; + struct device *dev; +}; + +static struct tee_rproc_context *tee_rproc_ctx; + +static void prepare_args(struct tee_rproc *trproc, int cmd, struct tee_ioctl_invoke_arg *arg, + struct tee_param *param, unsigned int num_params) +{ + memset(arg, 0, sizeof(*arg)); + memset(param, 0, MAX_TEE_PARAM_ARRY_MEMBER * sizeof(*param)); + + arg->func = cmd; + arg->session = trproc->session_id; + arg->num_params = num_params + 1; + + param[0] = (struct tee_param) { + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, + .u.value.a = trproc->rproc_id, + }; +} + +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw) +{ + struct tee_ioctl_invoke_arg arg; + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; + struct tee_shm *fw_shm; + int ret; + + fw_shm = tee_shm_register_kernel_buf(tee_rproc_ctx->tee_ctx, (void *)fw->data, fw->size); + if (IS_ERR(fw_shm)) + return PTR_ERR(fw_shm); + + prepare_args(trproc, TA_RPROC_FW_CMD_LOAD_FW, &arg, param, 1); + + /* Provide the address of the firmware image */ + param[1] = (struct tee_param) { + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT, + .u.memref = { + .shm = fw_shm, + .size = fw->size, + .shm_offs = 0, + }, + }; + + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); + if (ret < 0 || arg.ret != 0) { + dev_err(tee_rproc_ctx->dev, + "TA_RPROC_FW_CMD_LOAD_FW invoke failed TEE err: %x, ret:%x\n", + arg.ret, ret); + if (!ret) + ret = -EIO; + } + + tee_shm_free(fw_shm); + + return ret; +} +EXPORT_SYMBOL_GPL(tee_rproc_load_fw); + +int rproc_tee_get_rsc_table(struct tee_rproc *trproc) +{ + struct tee_ioctl_invoke_arg arg; + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; + struct rproc *rproc = trproc->rproc; + size_t rsc_size; + int ret; + + prepare_args(trproc, TA_RPROC_FW_CMD_GET_RSC_TABLE, &arg, param, 2); + + param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; + param[2].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT; + + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); + if (ret < 0 || arg.ret != 0) { + dev_err(tee_rproc_ctx->dev, + "TA_RPROC_FW_CMD_GET_RSC_TABLE invoke failed TEE err: %x, ret:%x\n", + arg.ret, ret); + return -EIO; + } + + rsc_size = param[2].u.value.a; + + /* If the size is null no resource table defined in the image */ + if (!rsc_size) + return 0; + + /* Store the resource table address that would be updated by the remote core . */ + trproc->rsc_va = ioremap_wc(param[1].u.value.a, rsc_size); + if (IS_ERR_OR_NULL(trproc->rsc_va)) { + dev_err(tee_rproc_ctx->dev, "Unable to map memory region: %lld+%zx\n", + param[1].u.value.a, rsc_size); + trproc->rsc_va = NULL; + return -ENOMEM; + } + + /* + * A cached table is requested as the physical address is not mapped yet + * but remoteproc needs to parse the table for resources. + */ + rproc->cached_table = kmemdup((__force void *)trproc->rsc_va, rsc_size, GFP_KERNEL); + if (!rproc->cached_table) + return -ENOMEM; + + rproc->table_ptr = rproc->cached_table; + rproc->table_sz = rsc_size; + + return 0; +} +EXPORT_SYMBOL_GPL(rproc_tee_get_rsc_table); + +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) +{ + return (__force struct resource_table *)trproc->rsc_va; +} +EXPORT_SYMBOL_GPL(tee_rproc_get_loaded_rsc_table); + +int tee_rproc_start(struct tee_rproc *trproc) +{ + struct tee_ioctl_invoke_arg arg; + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; + int ret; + + prepare_args(trproc, TA_RPROC_FW_CMD_START_FW, &arg, param, 0); + + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); + if (ret < 0 || arg.ret != 0) { + dev_err(tee_rproc_ctx->dev, + "TA_RPROC_FW_CMD_START_FW invoke failed TEE err: %x, ret:%x\n", + arg.ret, ret); + if (!ret) + ret = -EIO; + } + + return ret; +} +EXPORT_SYMBOL_GPL(tee_rproc_start); + +int tee_rproc_stop(struct tee_rproc *trproc) +{ + struct tee_ioctl_invoke_arg arg; + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; + int ret; + + prepare_args(trproc, TA_RPROC_FW_CMD_STOP_FW, &arg, param, 0); + + ret = tee_client_invoke_func(tee_rproc_ctx->tee_ctx, &arg, param); + if (ret < 0 || arg.ret != 0) { + dev_err(tee_rproc_ctx->dev, + "TA_RPROC_FW_CMD_STOP_FW invoke failed TEE err: %x, ret:%x\n", + arg.ret, ret); + if (!ret) + ret = -EIO; + } + if (trproc->rsc_va) + iounmap(trproc->rsc_va); + trproc->rsc_va = NULL; + + return ret; +} +EXPORT_SYMBOL_GPL(tee_rproc_stop); + +static const struct tee_client_device_id stm32_tee_rproc_id_table[] = { + {UUID_INIT(0x80a4c275, 0x0a47, 0x4905, + 0x82, 0x85, 0x14, 0x86, 0xa9, 0x77, 0x1a, 0x08)}, + {} +}; + +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) +{ + struct tee_client_device *rproc_tee_device; + struct tee_ioctl_open_session_arg sess_arg; + struct tee_param param[MAX_TEE_PARAM_ARRY_MEMBER]; + struct tee_rproc *trproc; + int ret; + + /* + * The device is not probed by the TEE bus. We ignore the reason (bus could be not yet + * probed or service not available in the secure firmware) + * Assumption here is that the TEE bus is not probed. + */ + if (!tee_rproc_ctx) + return ERR_PTR(-EPROBE_DEFER); + + trproc = devm_kzalloc(dev, sizeof(*trproc), GFP_KERNEL); + if (!trproc) + return ERR_PTR(-ENOMEM); + + rproc_tee_device = to_tee_client_device(tee_rproc_ctx->dev); + memset(&sess_arg, 0, sizeof(sess_arg)); + + /* Open session with rproc_tee load the OP-TEE Trusted Application */ + memcpy(sess_arg.uuid, rproc_tee_device->id.uuid.b, TEE_IOCTL_UUID_LEN); + + sess_arg.clnt_login = TEE_IOCTL_LOGIN_REE_KERNEL; + sess_arg.num_params = 1; + + param[0] = (struct tee_param) { + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT, + .u.value.a = rproc_id, + }; + + ret = tee_client_open_session(tee_rproc_ctx->tee_ctx, &sess_arg, param); + if (ret < 0 || sess_arg.ret != 0) { + dev_err(dev, "tee_client_open_session failed, err: %x\n", sess_arg.ret); + return ERR_PTR(-EINVAL); + } + + trproc->parent = dev; + trproc->rproc_id = rproc_id; + trproc->session_id = sess_arg.session; + + list_add_tail(&trproc->node, &tee_rproc_ctx->sessions); + + return trproc; +} +EXPORT_SYMBOL_GPL(tee_rproc_register); + +int tee_rproc_unregister(struct tee_rproc *trproc) +{ + int ret; + + if (!tee_rproc_ctx) + return -ENODEV; + + ret = tee_client_close_session(tee_rproc_ctx->tee_ctx, trproc->session_id); + if (ret < 0) + dev_err(trproc->parent, "tee_client_close_session failed, err: %x\n", ret); + + list_del(&trproc->node); + + return ret; +} +EXPORT_SYMBOL_GPL(tee_rproc_unregister); + +static int tee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) +{ + /* Today we support only the OP-TEE, could be extend to other tees */ + return (ver->impl_id == TEE_IMPL_ID_OPTEE); +} + +static int tee_rproc_probe(struct device *dev) +{ + struct tee_context *tee_ctx; + int ret; + + /* Only one RPROC OP-TEE device allowed */ + if (tee_rproc_ctx) { + dev_err(dev, "An RPROC OP-TEE device was already initialized: only one allowed\n"); + return -EBUSY; + } + + /* Open context with TEE driver */ + tee_ctx = tee_client_open_context(NULL, tee_ctx_match, NULL, NULL); + if (IS_ERR(tee_ctx)) + return PTR_ERR(tee_ctx); + + tee_rproc_ctx = devm_kzalloc(dev, sizeof(*tee_ctx), GFP_KERNEL); + if (!tee_ctx) { + ret = -ENOMEM; + goto err; + } + + tee_rproc_ctx->dev = dev; + tee_rproc_ctx->tee_ctx = tee_ctx; + INIT_LIST_HEAD(&tee_rproc_ctx->sessions); + + return 0; +err: + tee_client_close_context(tee_ctx); + + return ret; +} + +static int tee_rproc_remove(struct device *dev) +{ + struct tee_rproc *entry, *tmp; + + list_for_each_entry_safe(entry, tmp, &tee_rproc_ctx->sessions, node) { + tee_client_close_session(tee_rproc_ctx->tee_ctx, entry->session_id); + list_del(&entry->node); + kfree(entry); + } + + tee_client_close_context(tee_rproc_ctx->tee_ctx); + + return 0; +} + +MODULE_DEVICE_TABLE(tee, stm32_tee_rproc_id_table); + +static struct tee_client_driver tee_rproc_fw_driver = { + .id_table = stm32_tee_rproc_id_table, + .driver = { + .name = KBUILD_MODNAME, + .bus = &tee_bus_type, + .probe = tee_rproc_probe, + .remove = tee_rproc_remove, + }, +}; + +static int __init tee_rproc_fw_mod_init(void) +{ + return driver_register(&tee_rproc_fw_driver.driver); +} + +static void __exit tee_rproc_fw_mod_exit(void) +{ + driver_unregister(&tee_rproc_fw_driver.driver); +} + +module_init(tee_rproc_fw_mod_init); +module_exit(tee_rproc_fw_mod_exit); + +MODULE_DESCRIPTION(" TEE remote processor control driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/tee_remoteproc.h b/include/linux/tee_remoteproc.h new file mode 100644 index 000000000000..537d6dc3b858 --- /dev/null +++ b/include/linux/tee_remoteproc.h @@ -0,0 +1,99 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright(c) 2023 STMicroelectronics - All Rights Reserved + */ + +#ifndef TEE_REMOTEPROC_H +#define TEE_REMOTEPROC_H + +#include <linux/remoteproc.h> +#include <linux/tee_drv.h> + +/** + * struct tee_rproc - TEE remoteproc structure + * @node: Reference in list + * @rproc: Remoteproc reference + * @parent: Parent device + * @rproc_id: Identifier of the target firmware + * @session_id: TEE session identifier + * @rsc_va: Resource table virtual address. + */ +struct tee_rproc { + struct list_head node; + struct rproc *rproc; + struct device *parent; + u32 rproc_id; + u32 session_id; + void __iomem *rsc_va; +}; + +#if IS_ENABLED(CONFIG_TEE_REMOTEPROC) + +struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id); +int tee_rproc_unregister(struct tee_rproc *trproc); + +int tee_rproc_load_fw(struct tee_rproc *trproc, const struct firmware *fw); +int rproc_tee_get_rsc_table(struct tee_rproc *trproc); +struct resource_table *tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc); +int tee_rproc_start(struct tee_rproc *trproc); +int tee_rproc_stop(struct tee_rproc *trproc); + +#else + +static inline struct tee_rproc *tee_rproc_register(struct device *dev, unsigned int rproc_id) +{ + return ERR_PTR(-ENODEV); +} + +static inline int tee_rproc_unregister(struct tee_rproc *trproc) +{ + /* This shouldn't be possible */ + WARN_ON(1); + + return 0; +} + +static inline int tee_rproc_load_fw(struct tee_rproc *trproc, + const struct firmware *fw) +{ + /* This shouldn't be possible */ + WARN_ON(1); + + return 0; +} + +static inline int tee_rproc_start(struct tee_rproc *trproc) +{ + /* This shouldn't be possible */ + WARN_ON(1); + + return 0; +} + +static inline int tee_rproc_stop(struct tee_rproc *trproc) +{ + /* This shouldn't be possible */ + WARN_ON(1); + + return 0; +} + +static inline int rproc_tee_get_rsc_table(struct tee_rproc *trproc) +{ + /* This shouldn't be possible */ + WARN_ON(1); + + return 0; +} + +static inline struct resource_table * + tee_rproc_get_loaded_rsc_table(struct tee_rproc *trproc) +{ + /* This shouldn't be possible */ + WARN_ON(1); + + return NULL; +} + +#endif /* CONFIG_TEE_REMOTEPROC */ +#endif /* TEE_REMOTEPROC_H */