| Message ID | 20250311-imx-se-if-v13-5-9cc6d8fd6d1c@nxp.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | v13: firmware: imx: driver for NXP secure-enclave | expand |
On Tue, Mar 11, 2025 at 09:09:36PM +0530, Pankaj Gupta wrote: > Adds the driver for communication interface to secure-enclave, > for exchanging messages with NXP secure enclave HW IP(s) like > EdgeLock Enclave from: > - User-Space Applications via character driver. > > ABI documentation for the NXP secure-enclave driver. > > User-space library using this driver: > - i.MX Secure Enclave library: > -- URL: https://github.com/nxp-imx/imx-secure-enclave.git, > - i.MX Secure Middle-Ware: > -- URL: https://github.com/nxp-imx/imx-smw.git > > Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com> > --- > Documentation/ABI/testing/se-cdev | 43 ++ > drivers/firmware/imx/ele_base_msg.c | 11 +- > drivers/firmware/imx/ele_common.c | 77 +++- > drivers/firmware/imx/ele_common.h | 10 +- > drivers/firmware/imx/se_ctrl.c | 775 +++++++++++++++++++++++++++++++++++- > drivers/firmware/imx/se_ctrl.h | 43 ++ > include/uapi/linux/se_ioctl.h | 101 +++++ > 7 files changed, 1029 insertions(+), 31 deletions(-) > > diff --git a/Documentation/ABI/testing/se-cdev b/Documentation/ABI/testing/se-cdev > new file mode 100644 > index 000000000000..dad39ffd245a > --- /dev/null > +++ b/Documentation/ABI/testing/se-cdev > @@ -0,0 +1,43 @@ > +What: /dev/<se>_mu[0-9]+_ch[0-9]+ > +Date: Mar 2025 > +KernelVersion: 6.8 > +Contact: linux-imx@nxp.com, pankaj.gupta@nxp.com > +Description: > + NXP offers multiple hardware IP(s) for secure enclaves like EdgeLock- > + Enclave(ELE), SECO. The character device file descriptors > + /dev/<se>_mu*_ch* are the interface between userspace NXP's secure- > + enclave shared library and the kernel driver. > + > + The ioctl(2)-based ABI is defined and documented in > + [include]<linux/firmware/imx/ele_mu_ioctl.h>. > + ioctl(s) are used primarily for: > + - shared memory management > + - allocation of I/O buffers > + - getting mu info > + - setting a dev-ctx as receiver to receive all the commands from FW > + - getting SoC info > + - send command and receive command response > + > + The following file operations are supported: > + > + open(2) > + Currently the only useful flags are O_RDWR. > + > + read(2) > + Every read() from the opened character device context is waiting on > + wait_event_interruptible, that gets set by the registered mailbox callback > + function, indicating a message received from the firmware on message- > + unit. > + > + write(2) > + Every write() to the opened character device context needs to acquire > + mailbox_lock before sending message on to the message unit. > + > + close(2) > + Stops and frees up the I/O contexts that were associated > + with the file descriptor. > + > +Users: https://github.com/nxp-imx/imx-secure-enclave.git, > + https://github.com/nxp-imx/imx-smw.git > + crypto/skcipher, > + drivers/nvmem/imx-ocotp-ele.c > diff --git a/drivers/firmware/imx/ele_base_msg.c b/drivers/firmware/imx/ele_base_msg.c > index eea86f50d276..ed70728f5418 100644 > --- a/drivers/firmware/imx/ele_base_msg.c > +++ b/drivers/firmware/imx/ele_base_msg.c > @@ -62,7 +62,7 @@ int ele_get_info(struct se_if_priv *priv, struct ele_dev_info *s_info) > tx_msg->data[0] = upper_32_bits(get_info_addr); > tx_msg->data[1] = lower_32_bits(get_info_addr); > tx_msg->data[2] = sizeof(*s_info); > - ret = ele_msg_send_rcv(priv, > + ret = ele_msg_send_rcv(priv->priv_dev_ctx, Use seperate patch to change this trivial update to reduce review efforts. > tx_msg, > ELE_GET_INFO_REQ_MSG_SZ, > rx_msg, > @@ -128,7 +128,7 @@ int ele_ping(struct se_if_priv *priv) > return ret; > } > > - ret = ele_msg_send_rcv(priv, > + ret = ele_msg_send_rcv(priv->priv_dev_ctx, > tx_msg, > ELE_PING_REQ_SZ, > rx_msg, > @@ -177,7 +177,8 @@ int ele_service_swap(struct se_if_priv *priv, > tx_msg->data[3] = lower_32_bits(addr); > tx_msg->data[4] = se_add_msg_crc((uint32_t *)&tx_msg[0], > ELE_SERVICE_SWAP_REQ_MSG_SZ); > - ret = ele_msg_send_rcv(priv, > + > + ret = ele_msg_send_rcv(priv->priv_dev_ctx, > tx_msg, > ELE_SERVICE_SWAP_REQ_MSG_SZ, > rx_msg, > @@ -230,7 +231,7 @@ int ele_fw_authenticate(struct se_if_priv *priv, phys_addr_t addr) > tx_msg->data[0] = lower_32_bits(addr); > tx_msg->data[2] = addr; > > - ret = ele_msg_send_rcv(priv, > + ret = ele_msg_send_rcv(priv->priv_dev_ctx, > tx_msg, > ELE_FW_AUTH_REQ_SZ, > rx_msg, > @@ -284,7 +285,7 @@ int ele_debug_dump(struct se_if_priv *priv) > fmt_str_idx = 0; > memset(rx_msg, 0xCC, ELE_DEBUG_DUMP_RSP_SZ); > > - ret = ele_msg_send_rcv(priv, > + ret = ele_msg_send_rcv(priv->priv_dev_ctx, > tx_msg, > ELE_DEBUG_DUMP_REQ_SZ, > rx_msg, > diff --git a/drivers/firmware/imx/ele_common.c b/drivers/firmware/imx/ele_common.c > index 3fa8182b302f..d63346239936 100644 > --- a/drivers/firmware/imx/ele_common.c > +++ b/drivers/firmware/imx/ele_common.c > @@ -6,6 +6,8 @@ > #include "ele_base_msg.h" > #include "ele_common.h" > > +u32 se_rcv_msg_timeout = SE_RCV_MSG_DEFAULT_TIMEOUT; > + > u32 se_add_msg_crc(u32 *msg, u32 msg_len) > { > u32 nb_words = msg_len / (u32)sizeof(u32); > @@ -18,33 +20,57 @@ u32 se_add_msg_crc(u32 *msg, u32 msg_len) > return crc; > } > > -int ele_msg_rcv(struct se_if_priv *priv, > +void set_se_rcv_msg_timeout(u32 val) > +{ > + se_rcv_msg_timeout = val; Do you intent to use the same timeout value for all instance? > +} > + > +int ele_msg_rcv(struct se_if_device_ctx *dev_ctx, > struct se_clbk_handle *se_clbk_hdl) > { > - int err = 0; > + struct se_if_priv *priv = dev_ctx->priv; > + bool wait_timeout_enabled = true; > + unsigned int wait; > + int err; > > do { > - err = wait_for_completion_interruptible(&se_clbk_hdl->done); > + if (priv->cmd_receiver_clbk_hdl.dev_ctx == dev_ctx) { > + /* NVM-D, SE-FW slave waits indefinitly. */ > + wait_timeout_enabled = false; > + err = wait_for_completion_interruptible(&se_clbk_hdl->done); > + } else { > + /* FW must send message-response in a finite time. */ > + wait = msecs_to_jiffies(se_rcv_msg_timeout); > + err = wait_for_completion_interruptible_timeout(&se_clbk_hdl->done, wait); > + } wait = priv->cmd_receiver_clbk_hdl.dev_ctx == dev_ctx ? MAX_SCHEDULE_TIMEOUT : msecs_to_jiffies(se_rcv_msg_timeout); left = wait_for_completion_interruptible_timeout(&se_clbk_hdl->done, wait); > if (err == -ERESTARTSYS) { > - if (priv->waiting_rsp_clbk_hdl.rx_msg) { > + if (priv->waiting_rsp_clbk_hdl.dev_ctx) { > priv->waiting_rsp_clbk_hdl.signal_rcvd = true; > continue; > } > - dev_err(priv->dev, > - "Err[0x%x]:Interrupted by signal.\n", > - err); > err = -EINTR; > break; > } > - } while (err != 0); > + if (err == 0) { > + if (wait_timeout_enabled) { > + err = -ETIMEDOUT; > + dev_err(priv->dev, > + "Fatal Error: SE interface: %s%d, hangs indefinitely.\n", > + get_se_if_name(priv->if_defs->se_if_type), > + priv->if_defs->se_instance_id); simple logic use left; > + } > + break; > + } > + } while (err < 0); > > - return err ? err : se_clbk_hdl->rx_msg_sz; > + return (err >= 0) ? se_clbk_hdl->rx_msg_sz : err; needn't () > } > > -int ele_msg_send(struct se_if_priv *priv, > +int ele_msg_send(struct se_if_device_ctx *dev_ctx, > void *tx_msg, > int tx_msg_sz) > { > + struct se_if_priv *priv = dev_ctx->priv; > struct se_msg_hdr *header; > int err; > > @@ -56,7 +82,8 @@ int ele_msg_send(struct se_if_priv *priv, > */ > if (header->size << 2 != tx_msg_sz) { > dev_err(priv->dev, > - "User buf hdr: 0x%x, sz mismatced with input-sz (%d != %d).", > + "%s: User buf hdr: 0x%x, sz mismatced with input-sz (%d != %d).", > + dev_ctx->devname, put this change to seperated patch, which include below change. - ret = ele_msg_send_rcv(priv, + ret = ele_msg_send_rcv(priv->priv_dev_ctx, > *(u32 *)header, > header->size << 2, tx_msg_sz); > return -EINVAL; > @@ -64,7 +91,9 @@ int ele_msg_send(struct se_if_priv *priv, > > err = mbox_send_message(priv->tx_chan, tx_msg); > if (err < 0) { > - dev_err(priv->dev, "Error: mbox_send_message failure.\n"); > + dev_err(priv->dev, > + "%s: Error: mbox_send_message failure.", > + dev_ctx->devname); > return err; > } > err = tx_msg_sz; > @@ -73,32 +102,36 @@ int ele_msg_send(struct se_if_priv *priv, > } > > /* API used for send/receive blocking call. */ > -int ele_msg_send_rcv(struct se_if_priv *priv, > +int ele_msg_send_rcv(struct se_if_device_ctx *dev_ctx, > void *tx_msg, > int tx_msg_sz, > void *rx_msg, > int exp_rx_msg_sz) > { > int err; > + struct se_if_priv *priv = dev_ctx->priv; > > guard(mutex)(&priv->se_if_cmd_lock); > > + priv->waiting_rsp_clbk_hdl.dev_ctx = dev_ctx; > priv->waiting_rsp_clbk_hdl.rx_msg_sz = exp_rx_msg_sz; > priv->waiting_rsp_clbk_hdl.rx_msg = rx_msg; > > - err = ele_msg_send(priv, tx_msg, tx_msg_sz); > + err = ele_msg_send(dev_ctx, tx_msg, tx_msg_sz); > if (err < 0) > return err; > > - err = ele_msg_rcv(priv, &priv->waiting_rsp_clbk_hdl); > + err = ele_msg_rcv(dev_ctx, &priv->waiting_rsp_clbk_hdl); > > if (priv->waiting_rsp_clbk_hdl.signal_rcvd) { > err = -EINTR; > priv->waiting_rsp_clbk_hdl.signal_rcvd = false; > dev_err(priv->dev, > - "Err[0x%x]:Interrupted by signal.\n", > + "%s: Err[0x%x]:Interrupted by signal.\n", > + dev_ctx->devname, > err); > } > + priv->waiting_rsp_clbk_hdl.dev_ctx = NULL; > > return err; > } > @@ -144,7 +177,8 @@ void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg) > if (header->tag == priv->if_defs->cmd_tag) { > se_clbk_hdl = &priv->cmd_receiver_clbk_hdl; > dev_dbg(dev, > - "Selecting cmd receiver for mesg header:0x%x.", > + "Selecting cmd receiver:%s for mesg header:0x%x.", > + se_clbk_hdl->dev_ctx->devname, > *(u32 *)header); > > /* Pre-allocated buffer of MAX_NVM_MSG_LEN > @@ -153,7 +187,8 @@ void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg) > */ > if (rx_msg_sz > MAX_NVM_MSG_LEN) { > dev_err(dev, > - "CMD-RCVER NVM: hdr(0x%x) with different sz(%d != %d).\n", > + "%s: CMD-RCVER NVM: hdr(0x%x) with different sz(%d != %d).\n", > + se_clbk_hdl->dev_ctx->devname, > *(u32 *)header, > rx_msg_sz, se_clbk_hdl->rx_msg_sz); > > @@ -164,13 +199,15 @@ void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg) > } else if (header->tag == priv->if_defs->rsp_tag) { > se_clbk_hdl = &priv->waiting_rsp_clbk_hdl; > dev_dbg(dev, > - "Selecting resp waiter for mesg header:0x%x.", > + "Selecting resp waiter:%s for mesg header:0x%x.", > + se_clbk_hdl->dev_ctx->devname, > *(u32 *)header); > > if (rx_msg_sz != se_clbk_hdl->rx_msg_sz && > !exception_for_size(priv, header)) { > dev_err(dev, > - "Rsp to CMD: hdr(0x%x) with different sz(%d != %d).\n", > + "%s: Rsp to CMD: hdr(0x%x) with different sz(%d != %d).\n", > + se_clbk_hdl->dev_ctx->devname, > *(u32 *)header, > rx_msg_sz, se_clbk_hdl->rx_msg_sz); > > diff --git a/drivers/firmware/imx/ele_common.h b/drivers/firmware/imx/ele_common.h > index aceb8c891ae6..3cf124f41487 100644 > --- a/drivers/firmware/imx/ele_common.h > +++ b/drivers/firmware/imx/ele_common.h > @@ -12,13 +12,17 @@ > > #define IMX_ELE_FW_DIR "imx/ele/" > > +#define SE_RCV_MSG_DEFAULT_TIMEOUT 5000 > +#define SE_RCV_MSG_LONG_TIMEOUT 5000000 > +void set_se_rcv_msg_timeout(u32 val); > + > u32 se_add_msg_crc(u32 *msg, u32 msg_len); > -int ele_msg_rcv(struct se_if_priv *priv, > +int ele_msg_rcv(struct se_if_device_ctx *dev_ctx, > struct se_clbk_handle *se_clbk_hdl); > -int ele_msg_send(struct se_if_priv *priv, > +int ele_msg_send(struct se_if_device_ctx *dev_ctx, > void *tx_msg, > int tx_msg_sz); > -int ele_msg_send_rcv(struct se_if_priv *priv, > +int ele_msg_send_rcv(struct se_if_device_ctx *dev_ctx, > void *tx_msg, > int tx_msg_sz, > void *rx_msg, > diff --git a/drivers/firmware/imx/se_ctrl.c b/drivers/firmware/imx/se_ctrl.c > index 12a1ceb87866..f31d97045b89 100644 > --- a/drivers/firmware/imx/se_ctrl.c > +++ b/drivers/firmware/imx/se_ctrl.c > @@ -23,6 +23,7 @@ > #include <linux/slab.h> > #include <linux/string.h> > #include <linux/sys_soc.h> > +#include <uapi/linux/se_ioctl.h> > > #include "ele_base_msg.h" > #include "ele_common.h" > @@ -31,8 +32,6 @@ > #define MAX_SOC_INFO_DATA_SZ 256 > #define MBOX_TX_NAME "tx" > #define MBOX_RX_NAME "rx" > -#define SE_TYPE_STR_HSM "hsm" > -#define SE_TYPE_ID_HSM 0x2 > > struct se_fw_img_name { > const u8 *prim_fw_nm_in_rfs; > @@ -140,6 +139,24 @@ static const struct of_device_id se_match[] = { > {}, > }; > > +char *get_se_if_name(u8 se_if_id) > +{ > + switch (se_if_id) { > + case SE_TYPE_ID_DBG: return SE_TYPE_STR_DBG; > + case SE_TYPE_ID_HSM: return SE_TYPE_STR_HSM; > + } > + > + return NULL; > +} > + > +static uint32_t get_se_soc_id(struct se_if_priv *priv) > +{ > + const struct se_soc_info *se_info = > + device_get_match_data(priv->dev); > + > + return se_info->soc_id; > +} > + > static struct se_fw_load_info *get_load_fw_instance(struct se_if_priv *priv) > { > return &var_se_info.load_fw; > @@ -286,6 +303,742 @@ static int se_load_firmware(struct se_if_priv *priv) > return ret; > } > > +static int init_se_shared_mem(struct se_if_device_ctx *dev_ctx) > +{ > + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; > + struct se_if_priv *priv = dev_ctx->priv; > + > + INIT_LIST_HEAD(&se_shared_mem_mgmt->pending_out); > + INIT_LIST_HEAD(&se_shared_mem_mgmt->pending_in); > + > + /* > + * Allocate some memory for data exchanges with S40x. > + * This will be used for data not requiring secure memory. > + */ > + se_shared_mem_mgmt->non_secure_mem.ptr = > + dma_alloc_coherent(priv->dev, > + MAX_DATA_SIZE_PER_USER, > + &se_shared_mem_mgmt->non_secure_mem.dma_addr, > + GFP_KERNEL); > + if (!se_shared_mem_mgmt->non_secure_mem.ptr) > + return -ENOMEM; > + > + se_shared_mem_mgmt->non_secure_mem.size = MAX_DATA_SIZE_PER_USER; > + se_shared_mem_mgmt->non_secure_mem.pos = 0; > + > + return 0; > +} > + > +static void cleanup_se_shared_mem(struct se_if_device_ctx *dev_ctx) > +{ > + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; > + struct se_if_priv *priv = dev_ctx->priv; > + > + /* Unmap secure memory shared buffer. */ > + if (se_shared_mem_mgmt->secure_mem.ptr) > + devm_iounmap(priv->dev, > + (void __iomem *)se_shared_mem_mgmt->secure_mem.ptr); > + > + se_shared_mem_mgmt->secure_mem.ptr = NULL; > + se_shared_mem_mgmt->secure_mem.dma_addr = 0; > + se_shared_mem_mgmt->secure_mem.size = 0; > + se_shared_mem_mgmt->secure_mem.pos = 0; where init secure_mem? not symetric with init_se_shared_mem() > + > + /* Free non-secure shared buffer. */ > + dma_free_coherent(priv->dev, MAX_DATA_SIZE_PER_USER, > + se_shared_mem_mgmt->non_secure_mem.ptr, > + se_shared_mem_mgmt->non_secure_mem.dma_addr); > + > + se_shared_mem_mgmt->non_secure_mem.ptr = NULL; > + se_shared_mem_mgmt->non_secure_mem.dma_addr = 0; > + se_shared_mem_mgmt->non_secure_mem.size = 0; > + se_shared_mem_mgmt->non_secure_mem.pos = 0; > +} > + > +/* Need to copy the output data to user-device context. > + */ > +static int se_dev_ctx_cpy_out_data(struct se_if_device_ctx *dev_ctx) > +{ > + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; > + struct se_if_priv *priv = dev_ctx->priv; > + struct se_buf_desc *b_desc, *temp; > + bool do_cpy = true; > + > + list_for_each_entry_safe(b_desc, temp, &se_shared_mem_mgmt->pending_out, link) { Why not need lock here? > + if (b_desc->usr_buf_ptr && b_desc->shared_buf_ptr && do_cpy) { > + dev_dbg(priv->dev, > + "Copying output data to user."); > + if (do_cpy && copy_to_user(b_desc->usr_buf_ptr, > + b_desc->shared_buf_ptr, > + b_desc->size)) { > + dev_err(priv->dev, > + "Failure copying output data to user."); > + do_cpy = false; return -EFAULT ? So needn't do_cpy. missed list_del(&b_desc->link) and kfree() for copy_to_user fail case. > + } > + } > + > + if (b_desc->shared_buf_ptr) > + memset(b_desc->shared_buf_ptr, 0, b_desc->size); > + > + list_del(&b_desc->link); > + kfree(b_desc); > + } > + > + return do_cpy ? 0 : -EFAULT; > +} > + > +/* > + * Clean the used Shared Memory space, > + * whether its Input Data copied from user buffers, or > + * Data received from FW. > + */ > +static void se_dev_ctx_shared_mem_cleanup(struct se_if_device_ctx *dev_ctx) > +{ > + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; > + struct list_head *pending_lists[] = {&se_shared_mem_mgmt->pending_in, > + &se_shared_mem_mgmt->pending_out}; > + struct se_buf_desc *b_desc, *temp; > + int i; > + > + for (i = 0; i < 2; i++) { > + list_for_each_entry_safe(b_desc, temp, > + pending_lists[i], link) { > + if (b_desc->shared_buf_ptr) > + memset(b_desc->shared_buf_ptr, 0, b_desc->size); > + > + list_del(&b_desc->link); > + kfree(b_desc); > + } > + } > + se_shared_mem_mgmt->secure_mem.pos = 0; > + se_shared_mem_mgmt->non_secure_mem.pos = 0; > +} > + > +static int add_b_desc_to_pending_list(void *shared_ptr_with_pos, > + struct se_ioctl_setup_iobuf *io, > + struct se_if_device_ctx *dev_ctx) > +{ > + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; > + struct se_buf_desc *b_desc = NULL; > + > + b_desc = kzalloc(sizeof(*b_desc), GFP_KERNEL); > + if (!b_desc) > + return -ENOMEM; > + > + b_desc->shared_buf_ptr = shared_ptr_with_pos; > + b_desc->usr_buf_ptr = io->user_buf; > + b_desc->size = io->length; > + > + if (io->flags & SE_IO_BUF_FLAGS_IS_INPUT) { > + /* > + * buffer is input: > + * add an entry in the "pending input buffers" list so > + * that copied data can be cleaned from shared memory > + * later. > + */ > + list_add_tail(&b_desc->link, &se_shared_mem_mgmt->pending_in); Are you sure needn't lock for link? > + } else { > + /* > + * buffer is output: > + * add an entry in the "pending out buffers" list so data > + * can be copied to user space when receiving Secure-Enclave > + * response. > + */ > + list_add_tail(&b_desc->link, &se_shared_mem_mgmt->pending_out); > + } > + > + return 0; > +} > + > +/* interface for managed res to unregister a character device */ > +static void if_misc_deregister(void *miscdevice) > +{ > + misc_deregister(miscdevice); > +} > + > +static int init_device_context(struct se_if_priv *priv, int ch_id, > + struct se_if_device_ctx **new_dev_ctx, > + const struct file_operations *se_if_fops) > +{ > + struct se_if_device_ctx *dev_ctx; > + int ret = 0; > + > + if (ch_id) > + dev_ctx = kzalloc(sizeof(*dev_ctx), GFP_KERNEL); > + else > + dev_ctx = devm_kzalloc(priv->dev, sizeof(*dev_ctx), GFP_KERNEL); why need distinguish it? > + > + if (!dev_ctx) > + return -ENOMEM; > + > + dev_ctx->priv = priv; > + > + if (ch_id) > + dev_ctx->devname = kasprintf(GFP_KERNEL, "%s%d_ch%d", > + get_se_if_name(priv->if_defs->se_if_type), > + priv->if_defs->se_instance_id, > + ch_id); > + else > + dev_ctx->devname = devm_kasprintf(priv->dev, GFP_KERNEL, "%s%d_ch%d", > + get_se_if_name(priv->if_defs->se_if_type), > + priv->if_defs->se_instance_id, > + ch_id); the same here. > + if (!dev_ctx->devname) { > + if (ch_id) > + kfree(dev_ctx); > + > + return -ENOMEM; > + } > + > + mutex_init(&dev_ctx->fops_lock); > + > + *new_dev_ctx = dev_ctx; > + > + if (ch_id) { > + list_add_tail(&dev_ctx->link, &priv->dev_ctx_list); > + priv->active_devctx_count++; > + > + ret = init_se_shared_mem(dev_ctx); > + if (ret < 0) { > + kfree(dev_ctx->devname); > + kfree(dev_ctx); > + *new_dev_ctx = NULL; > + return ret; > + } > + > + return ret; > + } > + > + /* Only for ch_id = 0: > + * - register the misc device. > + * - add action > + */ > + dev_ctx->miscdev = devm_kzalloc(priv->dev, sizeof(*dev_ctx->miscdev), GFP_KERNEL); > + if (!dev_ctx->miscdev) { > + *new_dev_ctx = NULL; > + return -ENOMEM; > + } > + > + dev_ctx->miscdev->name = dev_ctx->devname; > + dev_ctx->miscdev->minor = MISC_DYNAMIC_MINOR; > + dev_ctx->miscdev->fops = se_if_fops; > + dev_ctx->miscdev->parent = priv->dev; > + ret = misc_register(dev_ctx->miscdev); > + if (ret) { > + dev_err(priv->dev, "failed to register misc device %d\n", > + ret); > + return ret; return dev_err_probe(); > + } > + > + ret = devm_add_action(priv->dev, if_misc_deregister, > + dev_ctx->miscdev); > + if (ret) { > + dev_err(priv->dev, > + "failed[%d] to add action to the misc-dev\n", > + ret); > + misc_deregister(dev_ctx->miscdev); devm_add_action_or_reset(); > + } > + > + return ret; > +} > + > +static int se_ioctl_cmd_snd_rcv_rsp_handler(struct se_if_device_ctx *dev_ctx, > + u64 arg) > +{ > + struct se_ioctl_cmd_snd_rcv_rsp_info cmd_snd_rcv_rsp_info = {0}; > + struct se_if_priv *priv = dev_ctx->priv; > + struct se_api_msg *tx_msg __free(kfree) = NULL; > + struct se_api_msg *rx_msg __free(kfree) = NULL; > + int err = 0; > + > + if (copy_from_user(&cmd_snd_rcv_rsp_info, (u8 __user *)arg, > + sizeof(cmd_snd_rcv_rsp_info))) { > + dev_err(priv->dev, > + "%s: Failed to copy cmd_snd_rcv_rsp_info from user\n", > + dev_ctx->devname); > + err = -EFAULT; > + goto exit; > + } > + > + if (cmd_snd_rcv_rsp_info.tx_buf_sz < SE_MU_HDR_SZ) { > + dev_err(priv->dev, > + "%s: User buffer too small(%d < %d)\n", > + dev_ctx->devname, > + cmd_snd_rcv_rsp_info.tx_buf_sz, > + SE_MU_HDR_SZ); > + err = -ENOSPC; > + goto exit; > + } > + > + rx_msg = kzalloc(cmd_snd_rcv_rsp_info.rx_buf_sz, GFP_KERNEL); > + if (!rx_msg) { > + err = -ENOMEM; > + goto exit; > + } > + > + tx_msg = memdup_user(cmd_snd_rcv_rsp_info.tx_buf, > + cmd_snd_rcv_rsp_info.tx_buf_sz); > + if (IS_ERR(tx_msg)) { > + err = PTR_ERR(tx_msg); > + goto exit; > + } > + > + if (tx_msg->header.tag != priv->if_defs->cmd_tag) { > + err = -EINVAL; > + goto exit; > + } > + > + if (tx_msg->header.ver == priv->if_defs->fw_api_ver && > + !get_load_fw_instance(priv)->is_fw_loaded) { > + err = se_load_firmware(priv); > + if (err) { > + dev_err(priv->dev, "Could not send the message as FW is not loaded."); > + err = -EPERM; > + goto exit; > + } > + } > + set_se_rcv_msg_timeout(SE_RCV_MSG_LONG_TIMEOUT); > + > + err = ele_msg_send_rcv(dev_ctx, > + tx_msg, > + cmd_snd_rcv_rsp_info.tx_buf_sz, > + rx_msg, > + cmd_snd_rcv_rsp_info.rx_buf_sz); > + if (err < 0) > + goto exit; > + > + dev_dbg(priv->dev, > + "%s: %s %s\n", > + dev_ctx->devname, > + __func__, > + "message received, start transmit to user"); > + > + /* We may need to copy the output data to user before > + * delivering the completion message. > + */ > + err = se_dev_ctx_cpy_out_data(dev_ctx); > + if (err < 0) > + goto exit; > + > + /* Copy data from the buffer */ > + print_hex_dump_debug("to user ", DUMP_PREFIX_OFFSET, 4, 4, > + rx_msg, > + cmd_snd_rcv_rsp_info.rx_buf_sz, false); > + > + if (copy_to_user(cmd_snd_rcv_rsp_info.rx_buf, rx_msg, > + cmd_snd_rcv_rsp_info.rx_buf_sz)) { > + dev_err(priv->dev, > + "%s: Failed to copy to user\n", > + dev_ctx->devname); > + err = -EFAULT; > + } > + > +exit: > + > + /* shared memory is allocated before this IOCTL */ > + se_dev_ctx_shared_mem_cleanup(dev_ctx); > + > + if (copy_to_user((void __user *)arg, &cmd_snd_rcv_rsp_info, > + sizeof(cmd_snd_rcv_rsp_info))) { > + dev_err(priv->dev, > + "%s: Failed to copy cmd_snd_rcv_rsp_info from user\n", > + dev_ctx->devname); > + err = -EFAULT; > + } > + > + return err; > +} > + > +static int se_ioctl_get_mu_info(struct se_if_device_ctx *dev_ctx, > + u64 arg) > +{ > + struct se_if_priv *priv = dev_ctx->priv; > + struct se_if_node *if_node; > + struct se_ioctl_get_if_info if_info; > + int err = 0; > + > + if_node = container_of(priv->if_defs, typeof(*if_node), if_defs); > + > + if_info.se_if_id = 0; > + if_info.interrupt_idx = 0; > + if_info.tz = 0; > + if_info.did = if_node->se_if_did; > + if_info.cmd_tag = priv->if_defs->cmd_tag; > + if_info.rsp_tag = priv->if_defs->rsp_tag; > + if_info.success_tag = priv->if_defs->success_tag; > + if_info.base_api_ver = priv->if_defs->base_api_ver; > + if_info.fw_api_ver = priv->if_defs->fw_api_ver; > + > + dev_dbg(priv->dev, > + "%s: info [se_if_id: %d, irq_idx: %d, tz: 0x%x, did: 0x%x]\n", > + dev_ctx->devname, > + if_info.se_if_id, if_info.interrupt_idx, > + if_info.tz, if_info.did); > + > + if (copy_to_user((u8 __user *)arg, &if_info, sizeof(if_info))) { > + dev_err(priv->dev, > + "%s: Failed to copy mu info to user\n", > + dev_ctx->devname); > + err = -EFAULT; > + } > + > + return err; > +} > + > +/* > + * Copy a buffer of data to/from the user and return the address to use in > + * messages > + */ > +static int se_ioctl_setup_iobuf_handler(struct se_if_device_ctx *dev_ctx, > + u64 arg) > +{ > + struct se_shared_mem *shared_mem = NULL; > + struct se_ioctl_setup_iobuf io = {0}; > + int err = 0; > + u32 pos; > + > + if (copy_from_user(&io, (u8 __user *)arg, sizeof(io))) { > + dev_err(dev_ctx->priv->dev, > + "%s: Failed copy iobuf config from user\n", > + dev_ctx->devname); > + return -EFAULT; > + } > + > + dev_dbg(dev_ctx->priv->dev, > + "%s: io [buf: %p(%d) flag: %x]\n", > + dev_ctx->devname, > + io.user_buf, io.length, io.flags); > + > + if (io.length == 0 || !io.user_buf) { > + /* > + * Accept NULL pointers since some buffers are optional > + * in FW commands. In this case we should return 0 as > + * pointer to be embedded into the message. > + * Skip all data copy part of code below. > + */ > + io.ele_addr = 0; > + goto copy; > + } > + > + /* No specific requirement for this buffer. */ > + shared_mem = &dev_ctx->se_shared_mem_mgmt.non_secure_mem; > + > + /* Check there is enough space in the shared memory. */ > + dev_dbg(dev_ctx->priv->dev, > + "%s: req_size = %d, max_size= %d, curr_pos = %d", > + dev_ctx->devname, > + round_up(io.length, 8u), > + shared_mem->size, shared_mem->pos); > + > + if (shared_mem->size < shared_mem->pos || > + round_up(io.length, 8u) > (shared_mem->size - shared_mem->pos)) { > + dev_err(dev_ctx->priv->dev, > + "%s: Not enough space in shared memory\n", > + dev_ctx->devname); > + return -ENOMEM; > + } > + > + /* Allocate space in shared memory. 8 bytes aligned. */ > + pos = shared_mem->pos; > + shared_mem->pos += round_up(io.length, 8u); > + io.ele_addr = (u64)shared_mem->dma_addr + pos; > + > + memset(shared_mem->ptr + pos, 0, io.length); > + if ((io.flags & SE_IO_BUF_FLAGS_IS_INPUT) || > + (io.flags & SE_IO_BUF_FLAGS_IS_IN_OUT)) { > + /* > + * buffer is input: > + * copy data from user space to this allocated buffer. > + */ > + if (copy_from_user(shared_mem->ptr + pos, io.user_buf, > + io.length)) { > + dev_err(dev_ctx->priv->dev, > + "%s: Failed copy data to shared memory\n", > + dev_ctx->devname); > + return -EFAULT; > + } > + } > + > + err = add_b_desc_to_pending_list(shared_mem->ptr + pos, > + &io, > + dev_ctx); > + if (err < 0) > + dev_err(dev_ctx->priv->dev, > + "%s: Failed to allocate/link b_desc.", > + dev_ctx->devname); > + > +copy: > + /* Provide the EdgeLock Enclave address to user space only if success.*/ > + if (copy_to_user((u8 __user *)arg, &io, sizeof(io))) { > + dev_err(dev_ctx->priv->dev, > + "%s: Failed to copy iobuff setup to user.", > + dev_ctx->devname); > + err = -EFAULT; > + } > + > + return err; > +} > + > +/* IOCTL to provide SoC information */ > +static int se_ioctl_get_se_soc_info_handler(struct se_if_device_ctx *dev_ctx, > + u64 arg) > +{ > + struct se_ioctl_get_soc_info soc_info; > + int err = -EINVAL; > + > + soc_info.soc_id = get_se_soc_id(dev_ctx->priv); > + soc_info.soc_rev = var_se_info.soc_rev; > + > + err = (int)copy_to_user((u8 __user *)arg, (u8 *)(&soc_info), sizeof(soc_info)); needn't (int) > + if (err) { > + dev_err(dev_ctx->priv->dev, > + "%s: Failed to copy soc info to user\n", > + dev_ctx->devname); > + err = -EFAULT; > + } > + > + return err; > +} > + > +/* > + * File operations for user-space > + */ > + > +/* Write a message to the MU. */ > +static ssize_t se_if_fops_write(struct file *fp, const char __user *buf, > + size_t size, loff_t *ppos) > +{ > + struct se_if_device_ctx *dev_ctx = fp->private_data; > + struct se_api_msg *tx_msg __free(kfree) = NULL; > + struct se_if_priv *priv = dev_ctx->priv; > + int err; > + > + dev_dbg(priv->dev, > + "%s: write from buf (%p)%zu, ppos=%lld\n", > + dev_ctx->devname, > + buf, size, ((ppos) ? *ppos : 0)); > + > + if (mutex_lock_interruptible(&dev_ctx->fops_lock)) > + return -EBUSY; you can guard() see mutex.h DEFINE_GUARD_COND(mutex, _intr, mutex_lock_interruptible(_T) == 0) > + > + if (dev_ctx != priv->cmd_receiver_clbk_hdl.dev_ctx) { > + err = -EINVAL; > + goto exit; > + } > + > + if (size < SE_MU_HDR_SZ) { > + dev_err(priv->dev, > + "%s: User buffer too small(%zu < %d)\n", > + dev_ctx->devname, > + size, SE_MU_HDR_SZ); > + err = -ENOSPC; > + goto exit; > + } > + > + tx_msg = memdup_user(buf, size); > + if (IS_ERR(tx_msg)) { > + err = PTR_ERR(tx_msg); > + goto exit; > + } > + > + print_hex_dump_debug("from user ", DUMP_PREFIX_OFFSET, 4, 4, > + tx_msg, size, false); > + > + err = ele_msg_send(dev_ctx, tx_msg, size); > + > +exit: > + mutex_unlock(&dev_ctx->fops_lock); > + return err; > +} > + > +/* > + * Read a message from the MU. > + * Blocking until a message is available. > + */ > +static ssize_t se_if_fops_read(struct file *fp, char __user *buf, > + size_t size, loff_t *ppos) > +{ > + struct se_if_device_ctx *dev_ctx = fp->private_data; > + struct se_if_priv *priv = dev_ctx->priv; > + int err; > + > + dev_dbg(priv->dev, > + "%s: read to buf %p(%zu), ppos=%lld\n", > + dev_ctx->devname, > + buf, size, ((ppos) ? *ppos : 0)); > + > + if (mutex_lock_interruptible(&dev_ctx->fops_lock)) > + return -EBUSY; > + > + if (dev_ctx != priv->cmd_receiver_clbk_hdl.dev_ctx) { > + err = -EINVAL; > + goto exit; > + } > + > + err = ele_msg_rcv(dev_ctx, &priv->cmd_receiver_clbk_hdl); > + if (err < 0) { > + dev_err(priv->dev, > + "%s: Err[0x%x]:Interrupted by signal.\n", > + dev_ctx->devname, err); > + dev_dbg(priv->dev, > + "Current active dev-ctx count = %d.\n", > + dev_ctx->priv->active_devctx_count); You can combine to dev_err(); > + goto exit; > + } > + > + /* We may need to copy the output data to user before > + * delivering the completion message. > + */ > + err = se_dev_ctx_cpy_out_data(dev_ctx); > + if (err < 0) > + goto exit; > + > + /* Copy data from the buffer */ > + print_hex_dump_debug("to user ", DUMP_PREFIX_OFFSET, 4, 4, > + priv->cmd_receiver_clbk_hdl.rx_msg, > + priv->cmd_receiver_clbk_hdl.rx_msg_sz, > + false); > + > + if (copy_to_user(buf, priv->cmd_receiver_clbk_hdl.rx_msg, > + priv->cmd_receiver_clbk_hdl.rx_msg_sz)) { > + dev_err(priv->dev, > + "%s: Failed to copy to user\n", > + dev_ctx->devname); > + err = -EFAULT; > + } > + err = priv->cmd_receiver_clbk_hdl.rx_msg_sz; > +exit: > + priv->cmd_receiver_clbk_hdl.rx_msg_sz = 0; > + > + se_dev_ctx_shared_mem_cleanup(dev_ctx); > + > + mutex_unlock(&dev_ctx->fops_lock); > + return err; > +} > + > +/* Open a character device. */ > +static int se_if_fops_open(struct inode *nd, struct file *fp) > +{ > + struct miscdevice *miscdev = fp->private_data; > + struct se_if_priv *priv = dev_get_drvdata(miscdev->parent); > + struct se_if_device_ctx *misc_dev_ctx = priv->priv_dev_ctx; > + struct se_if_device_ctx *dev_ctx; > + int err = 0; > + > + if (mutex_lock_interruptible(&misc_dev_ctx->fops_lock)) > + return -EBUSY; > + > + priv->dev_ctx_mono_count++; > + err = init_device_context(priv, > + priv->dev_ctx_mono_count ? > + priv->dev_ctx_mono_count > + : priv->dev_ctx_mono_count++, > + &dev_ctx, NULL); > + if (err) > + dev_err(priv->dev, > + "Failed[0x%x] to create device contexts.\n", > + err); > + else > + fp->private_data = dev_ctx; > + > + mutex_unlock(&misc_dev_ctx->fops_lock); > + return err; > +} > + > +/* Close a character device. */ > +static int se_if_fops_close(struct inode *nd, struct file *fp) > +{ > + struct se_if_device_ctx *dev_ctx = fp->private_data; > + struct se_if_priv *priv = dev_ctx->priv; > + > + if (mutex_lock_interruptible(&dev_ctx->fops_lock)) > + return -EBUSY; > + > + /* check if this device was registered as command receiver. */ > + if (priv->cmd_receiver_clbk_hdl.dev_ctx == dev_ctx) { > + priv->cmd_receiver_clbk_hdl.dev_ctx = NULL; > + kfree(priv->cmd_receiver_clbk_hdl.rx_msg); > + priv->cmd_receiver_clbk_hdl.rx_msg = NULL; > + } > + > + se_dev_ctx_shared_mem_cleanup(dev_ctx); > + cleanup_se_shared_mem(dev_ctx); > + > + priv->active_devctx_count--; > + list_del(&dev_ctx->link); > + > + mutex_unlock(&dev_ctx->fops_lock); > + kfree(dev_ctx->devname); > + kfree(dev_ctx); > + > + return 0; > +} > + > +/* IOCTL entry point of a character device */ > +static long se_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) > +{ > + struct se_if_device_ctx *dev_ctx = fp->private_data; > + struct se_if_priv *priv = dev_ctx->priv; > + int err; > + > + /* Prevent race during change of device context */ > + if (mutex_lock_interruptible(&dev_ctx->fops_lock)) > + return -EBUSY; > + > + switch (cmd) { > + case SE_IOCTL_ENABLE_CMD_RCV: > + if (!priv->cmd_receiver_clbk_hdl.dev_ctx) { > + if (!priv->cmd_receiver_clbk_hdl.rx_msg) { > + priv->cmd_receiver_clbk_hdl.rx_msg = > + kzalloc(MAX_NVM_MSG_LEN, > + GFP_KERNEL); > + if (!priv->cmd_receiver_clbk_hdl.rx_msg) { > + err = -ENOMEM; > + break; > + } > + } > + priv->cmd_receiver_clbk_hdl.rx_msg_sz = MAX_NVM_MSG_LEN; > + priv->cmd_receiver_clbk_hdl.dev_ctx = dev_ctx; > + err = 0; > + } else { > + err = -EBUSY; > + } > + break; > + case SE_IOCTL_GET_MU_INFO: > + err = se_ioctl_get_mu_info(dev_ctx, arg); > + break; > + case SE_IOCTL_SETUP_IOBUF: > + err = se_ioctl_setup_iobuf_handler(dev_ctx, arg); > + break; > + case SE_IOCTL_GET_SOC_INFO: > + err = se_ioctl_get_se_soc_info_handler(dev_ctx, arg); > + break; > + case SE_IOCTL_CMD_SEND_RCV_RSP: > + err = se_ioctl_cmd_snd_rcv_rsp_handler(dev_ctx, arg); > + break; > + default: > + err = -EINVAL; > + dev_dbg(priv->dev, > + "%s: IOCTL %.8x not supported\n", > + dev_ctx->devname, > + cmd); > + } > + > + mutex_unlock(&dev_ctx->fops_lock); > + > + return (long)err; > +} > + > +/* Char driver setup */ > +static const struct file_operations se_if_fops = { > + .open = se_if_fops_open, > + .owner = THIS_MODULE, > + .release = se_if_fops_close, > + .unlocked_ioctl = se_ioctl, > + .read = se_if_fops_read, > + .write = se_if_fops_write, > +}; > + > /* interface for managed res to free a mailbox channel */ > static void if_mbox_free_channel(void *mbox_chan) > { > @@ -321,6 +1074,7 @@ static int se_if_request_channel(struct device *dev, > > static void se_if_probe_cleanup(void *plat_dev) > { > + struct se_if_device_ctx *dev_ctx, *t_dev_ctx; > struct platform_device *pdev = plat_dev; > struct device *dev = &pdev->dev; > struct se_fw_load_info *load_fw; > @@ -345,6 +1099,13 @@ static void se_if_probe_cleanup(void *plat_dev) > load_fw->imem.buf = NULL; > } > > + if (priv->dev_ctx_mono_count) { > + list_for_each_entry_safe(dev_ctx, t_dev_ctx, &priv->dev_ctx_list, link) { > + list_del(&dev_ctx->link); > + priv->active_devctx_count--; > + } > + } > + > /* No need to check, if reserved memory is allocated > * before calling for its release. Or clearing the > * un-set bit. > @@ -410,6 +1171,7 @@ static int se_if_probe(struct platform_device *pdev) > "Unable to get sram pool = %s.", > if_node->pool_name); > } > + INIT_LIST_HEAD(&priv->dev_ctx_list); > > if (if_node->reserved_dma_ranges) { > ret = of_reserved_mem_device_init(dev); > @@ -418,6 +1180,12 @@ static int se_if_probe(struct platform_device *pdev) > "Failed to init reserved memory region."); > } > > + ret = init_device_context(priv, 0, &priv->priv_dev_ctx, &se_if_fops); > + if (ret) > + return dev_err_probe(dev, ret, > + "Failed[0x%x] to create device contexts.", > + ret); > + > if (if_node->if_defs.se_if_type == SE_TYPE_ID_HSM) { > ret = get_se_soc_info(priv, se_info); > if (ret) > @@ -444,7 +1212,7 @@ static int se_if_probe(struct platform_device *pdev) > } > } > dev_info(dev, "i.MX secure-enclave: %s%d interface to firmware, configured.", > - SE_TYPE_STR_HSM, > + get_se_if_name(priv->if_defs->se_if_type), > priv->if_defs->se_instance_id); > > return ret; > @@ -461,6 +1229,7 @@ static int se_suspend(struct device *dev) > struct se_fw_load_info *load_fw; > int ret = 0; > > + set_se_rcv_msg_timeout(SE_RCV_MSG_DEFAULT_TIMEOUT); > load_fw = get_load_fw_instance(priv); > > if (load_fw->imem_mgmt) > diff --git a/drivers/firmware/imx/se_ctrl.h b/drivers/firmware/imx/se_ctrl.h > index 32547bc97ca3..c103563091d5 100644 > --- a/drivers/firmware/imx/se_ctrl.h > +++ b/drivers/firmware/imx/se_ctrl.h > @@ -13,6 +13,7 @@ > #define MAX_FW_LOAD_RETRIES 50 > > #define RES_STATUS(x) FIELD_GET(0x000000ff, x) > +#define MAX_DATA_SIZE_PER_USER (65 * 1024) > #define MAX_NVM_MSG_LEN (256) > #define MESSAGING_VERSION_6 0x6 > #define MESSAGING_VERSION_7 0x7 > @@ -20,6 +21,7 @@ > struct se_clbk_handle { > struct completion done; > bool signal_rcvd; > + struct se_if_device_ctx *dev_ctx; > u32 rx_msg_sz; > /* Assignment of the rx_msg buffer to held till the > * received content as part callback function, is copied. > @@ -34,6 +36,41 @@ struct se_imem_buf { > u32 state; > }; > > +struct se_buf_desc { > + u8 *shared_buf_ptr; > + void __user *usr_buf_ptr; > + u32 size; > + struct list_head link; > +}; > + > +struct se_shared_mem { > + dma_addr_t dma_addr; > + u32 size; > + u32 pos; > + u8 *ptr; > +}; > + > +struct se_shared_mem_mgmt_info { > + struct list_head pending_in; > + struct list_head pending_out; > + > + struct se_shared_mem secure_mem; > + struct se_shared_mem non_secure_mem; > +}; > + > +/* Private struct for each char device instance. */ > +struct se_if_device_ctx { > + struct se_if_priv *priv; > + struct miscdevice *miscdev; > + const char *devname; > + > + /* process one file operation at a time. */ > + struct mutex fops_lock; > + > + struct se_shared_mem_mgmt_info se_shared_mem_mgmt; > + struct list_head link; > +}; > + > /* Header of the messages exchange with the EdgeLock Enclave */ > struct se_msg_hdr { > u8 ver; > @@ -78,6 +115,12 @@ struct se_if_priv { > > struct gen_pool *mem_pool; > const struct se_if_defines *if_defs; > + > + struct se_if_device_ctx *priv_dev_ctx; > + struct list_head dev_ctx_list; > + u32 active_devctx_count; > + u32 dev_ctx_mono_count; > }; > > +char *get_se_if_name(u8 se_if_id); > #endif > diff --git a/include/uapi/linux/se_ioctl.h b/include/uapi/linux/se_ioctl.h > new file mode 100644 > index 000000000000..29a9b1ec5ec3 > --- /dev/null > +++ b/include/uapi/linux/se_ioctl.h > @@ -0,0 +1,101 @@ > +/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause*/ > +/* > + * Copyright 2025 NXP > + */ > + > +#ifndef SE_IOCTL_H > +#define SE_IOCTL_H > + > +#include <linux/types.h> > + > +#define SE_TYPE_STR_DBG "dbg" > +#define SE_TYPE_STR_HSM "hsm" > +#define SE_TYPE_ID_UNKWN 0x0 > +#define SE_TYPE_ID_DBG 0x1 > +#define SE_TYPE_ID_HSM 0x2 > +/* IOCTL definitions. */ > + > +struct se_ioctl_setup_iobuf { > + void __user *user_buf; > + __u32 length; > + __u32 flags; > + __u64 ele_addr; > +}; > + > +struct se_ioctl_shared_mem_cfg { > + __u32 base_offset; > + __u32 size; > +}; > + > +struct se_ioctl_get_if_info { > + __u8 se_if_id; > + __u8 interrupt_idx; > + __u8 tz; > + __u8 did; > + __u8 cmd_tag; > + __u8 rsp_tag; > + __u8 success_tag; > + __u8 base_api_ver; > + __u8 fw_api_ver; > +}; > + > +struct se_ioctl_cmd_snd_rcv_rsp_info { > + __u32 __user *tx_buf; > + int tx_buf_sz; > + __u32 __user *rx_buf; > + int rx_buf_sz; > +}; > + > +struct se_ioctl_get_soc_info { > + __u16 soc_id; > + __u16 soc_rev; > +}; It'd better add pack for these interface. > + > +/* IO Buffer Flags */ > +#define SE_IO_BUF_FLAGS_IS_OUTPUT (0x00u) > +#define SE_IO_BUF_FLAGS_IS_INPUT (0x01u) > +#define SE_IO_BUF_FLAGS_USE_SEC_MEM (0x02u) > +#define SE_IO_BUF_FLAGS_USE_SHORT_ADDR (0x04u) > +#define SE_IO_BUF_FLAGS_IS_IN_OUT (0x10u) > + > +/* IOCTLS */ > +#define SE_IOCTL 0x0A /* like MISC_MAJOR. */ > + > +/* > + * ioctl to designated the current fd as logical-reciever. > + * This is ioctl is send when the nvm-daemon, a slave to the > + * firmware is started by the user. > + */ > +#define SE_IOCTL_ENABLE_CMD_RCV _IO(SE_IOCTL, 0x01) > + > +/* > + * ioctl to get the buffer allocated from the memory, which is shared > + * between kernel and FW. > + * Post allocation, the kernel tagged the allocated memory with: > + * Output > + * Input > + * Input-Output > + * Short address > + * Secure-memory > + */ > +#define SE_IOCTL_SETUP_IOBUF _IOWR(SE_IOCTL, 0x03, \ > + struct se_ioctl_setup_iobuf) > + > +/* > + * ioctl to get the mu information, that is used to exchange message > + * with FW, from user-spaced. > + */ > +#define SE_IOCTL_GET_MU_INFO _IOR(SE_IOCTL, 0x04, \ > + struct se_ioctl_get_if_info) > +/* > + * ioctl to get SoC Info from user-space. > + */ > +#define SE_IOCTL_GET_SOC_INFO _IOR(SE_IOCTL, 0x06, \ > + struct se_ioctl_get_soc_info) > + > +/* > + * ioctl to send command and receive response from user-space. > + */ > +#define SE_IOCTL_CMD_SEND_RCV_RSP _IOWR(SE_IOCTL, 0x07, \ > + struct se_ioctl_cmd_snd_rcv_rsp_info) > +#endif > > -- > 2.43.0 >
diff --git a/Documentation/ABI/testing/se-cdev b/Documentation/ABI/testing/se-cdev new file mode 100644 index 000000000000..dad39ffd245a --- /dev/null +++ b/Documentation/ABI/testing/se-cdev @@ -0,0 +1,43 @@ +What: /dev/<se>_mu[0-9]+_ch[0-9]+ +Date: Mar 2025 +KernelVersion: 6.8 +Contact: linux-imx@nxp.com, pankaj.gupta@nxp.com +Description: + NXP offers multiple hardware IP(s) for secure enclaves like EdgeLock- + Enclave(ELE), SECO. The character device file descriptors + /dev/<se>_mu*_ch* are the interface between userspace NXP's secure- + enclave shared library and the kernel driver. + + The ioctl(2)-based ABI is defined and documented in + [include]<linux/firmware/imx/ele_mu_ioctl.h>. + ioctl(s) are used primarily for: + - shared memory management + - allocation of I/O buffers + - getting mu info + - setting a dev-ctx as receiver to receive all the commands from FW + - getting SoC info + - send command and receive command response + + The following file operations are supported: + + open(2) + Currently the only useful flags are O_RDWR. + + read(2) + Every read() from the opened character device context is waiting on + wait_event_interruptible, that gets set by the registered mailbox callback + function, indicating a message received from the firmware on message- + unit. + + write(2) + Every write() to the opened character device context needs to acquire + mailbox_lock before sending message on to the message unit. + + close(2) + Stops and frees up the I/O contexts that were associated + with the file descriptor. + +Users: https://github.com/nxp-imx/imx-secure-enclave.git, + https://github.com/nxp-imx/imx-smw.git + crypto/skcipher, + drivers/nvmem/imx-ocotp-ele.c diff --git a/drivers/firmware/imx/ele_base_msg.c b/drivers/firmware/imx/ele_base_msg.c index eea86f50d276..ed70728f5418 100644 --- a/drivers/firmware/imx/ele_base_msg.c +++ b/drivers/firmware/imx/ele_base_msg.c @@ -62,7 +62,7 @@ int ele_get_info(struct se_if_priv *priv, struct ele_dev_info *s_info) tx_msg->data[0] = upper_32_bits(get_info_addr); tx_msg->data[1] = lower_32_bits(get_info_addr); tx_msg->data[2] = sizeof(*s_info); - ret = ele_msg_send_rcv(priv, + ret = ele_msg_send_rcv(priv->priv_dev_ctx, tx_msg, ELE_GET_INFO_REQ_MSG_SZ, rx_msg, @@ -128,7 +128,7 @@ int ele_ping(struct se_if_priv *priv) return ret; } - ret = ele_msg_send_rcv(priv, + ret = ele_msg_send_rcv(priv->priv_dev_ctx, tx_msg, ELE_PING_REQ_SZ, rx_msg, @@ -177,7 +177,8 @@ int ele_service_swap(struct se_if_priv *priv, tx_msg->data[3] = lower_32_bits(addr); tx_msg->data[4] = se_add_msg_crc((uint32_t *)&tx_msg[0], ELE_SERVICE_SWAP_REQ_MSG_SZ); - ret = ele_msg_send_rcv(priv, + + ret = ele_msg_send_rcv(priv->priv_dev_ctx, tx_msg, ELE_SERVICE_SWAP_REQ_MSG_SZ, rx_msg, @@ -230,7 +231,7 @@ int ele_fw_authenticate(struct se_if_priv *priv, phys_addr_t addr) tx_msg->data[0] = lower_32_bits(addr); tx_msg->data[2] = addr; - ret = ele_msg_send_rcv(priv, + ret = ele_msg_send_rcv(priv->priv_dev_ctx, tx_msg, ELE_FW_AUTH_REQ_SZ, rx_msg, @@ -284,7 +285,7 @@ int ele_debug_dump(struct se_if_priv *priv) fmt_str_idx = 0; memset(rx_msg, 0xCC, ELE_DEBUG_DUMP_RSP_SZ); - ret = ele_msg_send_rcv(priv, + ret = ele_msg_send_rcv(priv->priv_dev_ctx, tx_msg, ELE_DEBUG_DUMP_REQ_SZ, rx_msg, diff --git a/drivers/firmware/imx/ele_common.c b/drivers/firmware/imx/ele_common.c index 3fa8182b302f..d63346239936 100644 --- a/drivers/firmware/imx/ele_common.c +++ b/drivers/firmware/imx/ele_common.c @@ -6,6 +6,8 @@ #include "ele_base_msg.h" #include "ele_common.h" +u32 se_rcv_msg_timeout = SE_RCV_MSG_DEFAULT_TIMEOUT; + u32 se_add_msg_crc(u32 *msg, u32 msg_len) { u32 nb_words = msg_len / (u32)sizeof(u32); @@ -18,33 +20,57 @@ u32 se_add_msg_crc(u32 *msg, u32 msg_len) return crc; } -int ele_msg_rcv(struct se_if_priv *priv, +void set_se_rcv_msg_timeout(u32 val) +{ + se_rcv_msg_timeout = val; +} + +int ele_msg_rcv(struct se_if_device_ctx *dev_ctx, struct se_clbk_handle *se_clbk_hdl) { - int err = 0; + struct se_if_priv *priv = dev_ctx->priv; + bool wait_timeout_enabled = true; + unsigned int wait; + int err; do { - err = wait_for_completion_interruptible(&se_clbk_hdl->done); + if (priv->cmd_receiver_clbk_hdl.dev_ctx == dev_ctx) { + /* NVM-D, SE-FW slave waits indefinitly. */ + wait_timeout_enabled = false; + err = wait_for_completion_interruptible(&se_clbk_hdl->done); + } else { + /* FW must send message-response in a finite time. */ + wait = msecs_to_jiffies(se_rcv_msg_timeout); + err = wait_for_completion_interruptible_timeout(&se_clbk_hdl->done, wait); + } if (err == -ERESTARTSYS) { - if (priv->waiting_rsp_clbk_hdl.rx_msg) { + if (priv->waiting_rsp_clbk_hdl.dev_ctx) { priv->waiting_rsp_clbk_hdl.signal_rcvd = true; continue; } - dev_err(priv->dev, - "Err[0x%x]:Interrupted by signal.\n", - err); err = -EINTR; break; } - } while (err != 0); + if (err == 0) { + if (wait_timeout_enabled) { + err = -ETIMEDOUT; + dev_err(priv->dev, + "Fatal Error: SE interface: %s%d, hangs indefinitely.\n", + get_se_if_name(priv->if_defs->se_if_type), + priv->if_defs->se_instance_id); + } + break; + } + } while (err < 0); - return err ? err : se_clbk_hdl->rx_msg_sz; + return (err >= 0) ? se_clbk_hdl->rx_msg_sz : err; } -int ele_msg_send(struct se_if_priv *priv, +int ele_msg_send(struct se_if_device_ctx *dev_ctx, void *tx_msg, int tx_msg_sz) { + struct se_if_priv *priv = dev_ctx->priv; struct se_msg_hdr *header; int err; @@ -56,7 +82,8 @@ int ele_msg_send(struct se_if_priv *priv, */ if (header->size << 2 != tx_msg_sz) { dev_err(priv->dev, - "User buf hdr: 0x%x, sz mismatced with input-sz (%d != %d).", + "%s: User buf hdr: 0x%x, sz mismatced with input-sz (%d != %d).", + dev_ctx->devname, *(u32 *)header, header->size << 2, tx_msg_sz); return -EINVAL; @@ -64,7 +91,9 @@ int ele_msg_send(struct se_if_priv *priv, err = mbox_send_message(priv->tx_chan, tx_msg); if (err < 0) { - dev_err(priv->dev, "Error: mbox_send_message failure.\n"); + dev_err(priv->dev, + "%s: Error: mbox_send_message failure.", + dev_ctx->devname); return err; } err = tx_msg_sz; @@ -73,32 +102,36 @@ int ele_msg_send(struct se_if_priv *priv, } /* API used for send/receive blocking call. */ -int ele_msg_send_rcv(struct se_if_priv *priv, +int ele_msg_send_rcv(struct se_if_device_ctx *dev_ctx, void *tx_msg, int tx_msg_sz, void *rx_msg, int exp_rx_msg_sz) { int err; + struct se_if_priv *priv = dev_ctx->priv; guard(mutex)(&priv->se_if_cmd_lock); + priv->waiting_rsp_clbk_hdl.dev_ctx = dev_ctx; priv->waiting_rsp_clbk_hdl.rx_msg_sz = exp_rx_msg_sz; priv->waiting_rsp_clbk_hdl.rx_msg = rx_msg; - err = ele_msg_send(priv, tx_msg, tx_msg_sz); + err = ele_msg_send(dev_ctx, tx_msg, tx_msg_sz); if (err < 0) return err; - err = ele_msg_rcv(priv, &priv->waiting_rsp_clbk_hdl); + err = ele_msg_rcv(dev_ctx, &priv->waiting_rsp_clbk_hdl); if (priv->waiting_rsp_clbk_hdl.signal_rcvd) { err = -EINTR; priv->waiting_rsp_clbk_hdl.signal_rcvd = false; dev_err(priv->dev, - "Err[0x%x]:Interrupted by signal.\n", + "%s: Err[0x%x]:Interrupted by signal.\n", + dev_ctx->devname, err); } + priv->waiting_rsp_clbk_hdl.dev_ctx = NULL; return err; } @@ -144,7 +177,8 @@ void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg) if (header->tag == priv->if_defs->cmd_tag) { se_clbk_hdl = &priv->cmd_receiver_clbk_hdl; dev_dbg(dev, - "Selecting cmd receiver for mesg header:0x%x.", + "Selecting cmd receiver:%s for mesg header:0x%x.", + se_clbk_hdl->dev_ctx->devname, *(u32 *)header); /* Pre-allocated buffer of MAX_NVM_MSG_LEN @@ -153,7 +187,8 @@ void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg) */ if (rx_msg_sz > MAX_NVM_MSG_LEN) { dev_err(dev, - "CMD-RCVER NVM: hdr(0x%x) with different sz(%d != %d).\n", + "%s: CMD-RCVER NVM: hdr(0x%x) with different sz(%d != %d).\n", + se_clbk_hdl->dev_ctx->devname, *(u32 *)header, rx_msg_sz, se_clbk_hdl->rx_msg_sz); @@ -164,13 +199,15 @@ void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg) } else if (header->tag == priv->if_defs->rsp_tag) { se_clbk_hdl = &priv->waiting_rsp_clbk_hdl; dev_dbg(dev, - "Selecting resp waiter for mesg header:0x%x.", + "Selecting resp waiter:%s for mesg header:0x%x.", + se_clbk_hdl->dev_ctx->devname, *(u32 *)header); if (rx_msg_sz != se_clbk_hdl->rx_msg_sz && !exception_for_size(priv, header)) { dev_err(dev, - "Rsp to CMD: hdr(0x%x) with different sz(%d != %d).\n", + "%s: Rsp to CMD: hdr(0x%x) with different sz(%d != %d).\n", + se_clbk_hdl->dev_ctx->devname, *(u32 *)header, rx_msg_sz, se_clbk_hdl->rx_msg_sz); diff --git a/drivers/firmware/imx/ele_common.h b/drivers/firmware/imx/ele_common.h index aceb8c891ae6..3cf124f41487 100644 --- a/drivers/firmware/imx/ele_common.h +++ b/drivers/firmware/imx/ele_common.h @@ -12,13 +12,17 @@ #define IMX_ELE_FW_DIR "imx/ele/" +#define SE_RCV_MSG_DEFAULT_TIMEOUT 5000 +#define SE_RCV_MSG_LONG_TIMEOUT 5000000 +void set_se_rcv_msg_timeout(u32 val); + u32 se_add_msg_crc(u32 *msg, u32 msg_len); -int ele_msg_rcv(struct se_if_priv *priv, +int ele_msg_rcv(struct se_if_device_ctx *dev_ctx, struct se_clbk_handle *se_clbk_hdl); -int ele_msg_send(struct se_if_priv *priv, +int ele_msg_send(struct se_if_device_ctx *dev_ctx, void *tx_msg, int tx_msg_sz); -int ele_msg_send_rcv(struct se_if_priv *priv, +int ele_msg_send_rcv(struct se_if_device_ctx *dev_ctx, void *tx_msg, int tx_msg_sz, void *rx_msg, diff --git a/drivers/firmware/imx/se_ctrl.c b/drivers/firmware/imx/se_ctrl.c index 12a1ceb87866..f31d97045b89 100644 --- a/drivers/firmware/imx/se_ctrl.c +++ b/drivers/firmware/imx/se_ctrl.c @@ -23,6 +23,7 @@ #include <linux/slab.h> #include <linux/string.h> #include <linux/sys_soc.h> +#include <uapi/linux/se_ioctl.h> #include "ele_base_msg.h" #include "ele_common.h" @@ -31,8 +32,6 @@ #define MAX_SOC_INFO_DATA_SZ 256 #define MBOX_TX_NAME "tx" #define MBOX_RX_NAME "rx" -#define SE_TYPE_STR_HSM "hsm" -#define SE_TYPE_ID_HSM 0x2 struct se_fw_img_name { const u8 *prim_fw_nm_in_rfs; @@ -140,6 +139,24 @@ static const struct of_device_id se_match[] = { {}, }; +char *get_se_if_name(u8 se_if_id) +{ + switch (se_if_id) { + case SE_TYPE_ID_DBG: return SE_TYPE_STR_DBG; + case SE_TYPE_ID_HSM: return SE_TYPE_STR_HSM; + } + + return NULL; +} + +static uint32_t get_se_soc_id(struct se_if_priv *priv) +{ + const struct se_soc_info *se_info = + device_get_match_data(priv->dev); + + return se_info->soc_id; +} + static struct se_fw_load_info *get_load_fw_instance(struct se_if_priv *priv) { return &var_se_info.load_fw; @@ -286,6 +303,742 @@ static int se_load_firmware(struct se_if_priv *priv) return ret; } +static int init_se_shared_mem(struct se_if_device_ctx *dev_ctx) +{ + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; + struct se_if_priv *priv = dev_ctx->priv; + + INIT_LIST_HEAD(&se_shared_mem_mgmt->pending_out); + INIT_LIST_HEAD(&se_shared_mem_mgmt->pending_in); + + /* + * Allocate some memory for data exchanges with S40x. + * This will be used for data not requiring secure memory. + */ + se_shared_mem_mgmt->non_secure_mem.ptr = + dma_alloc_coherent(priv->dev, + MAX_DATA_SIZE_PER_USER, + &se_shared_mem_mgmt->non_secure_mem.dma_addr, + GFP_KERNEL); + if (!se_shared_mem_mgmt->non_secure_mem.ptr) + return -ENOMEM; + + se_shared_mem_mgmt->non_secure_mem.size = MAX_DATA_SIZE_PER_USER; + se_shared_mem_mgmt->non_secure_mem.pos = 0; + + return 0; +} + +static void cleanup_se_shared_mem(struct se_if_device_ctx *dev_ctx) +{ + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; + struct se_if_priv *priv = dev_ctx->priv; + + /* Unmap secure memory shared buffer. */ + if (se_shared_mem_mgmt->secure_mem.ptr) + devm_iounmap(priv->dev, + (void __iomem *)se_shared_mem_mgmt->secure_mem.ptr); + + se_shared_mem_mgmt->secure_mem.ptr = NULL; + se_shared_mem_mgmt->secure_mem.dma_addr = 0; + se_shared_mem_mgmt->secure_mem.size = 0; + se_shared_mem_mgmt->secure_mem.pos = 0; + + /* Free non-secure shared buffer. */ + dma_free_coherent(priv->dev, MAX_DATA_SIZE_PER_USER, + se_shared_mem_mgmt->non_secure_mem.ptr, + se_shared_mem_mgmt->non_secure_mem.dma_addr); + + se_shared_mem_mgmt->non_secure_mem.ptr = NULL; + se_shared_mem_mgmt->non_secure_mem.dma_addr = 0; + se_shared_mem_mgmt->non_secure_mem.size = 0; + se_shared_mem_mgmt->non_secure_mem.pos = 0; +} + +/* Need to copy the output data to user-device context. + */ +static int se_dev_ctx_cpy_out_data(struct se_if_device_ctx *dev_ctx) +{ + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; + struct se_if_priv *priv = dev_ctx->priv; + struct se_buf_desc *b_desc, *temp; + bool do_cpy = true; + + list_for_each_entry_safe(b_desc, temp, &se_shared_mem_mgmt->pending_out, link) { + if (b_desc->usr_buf_ptr && b_desc->shared_buf_ptr && do_cpy) { + dev_dbg(priv->dev, + "Copying output data to user."); + if (do_cpy && copy_to_user(b_desc->usr_buf_ptr, + b_desc->shared_buf_ptr, + b_desc->size)) { + dev_err(priv->dev, + "Failure copying output data to user."); + do_cpy = false; + } + } + + if (b_desc->shared_buf_ptr) + memset(b_desc->shared_buf_ptr, 0, b_desc->size); + + list_del(&b_desc->link); + kfree(b_desc); + } + + return do_cpy ? 0 : -EFAULT; +} + +/* + * Clean the used Shared Memory space, + * whether its Input Data copied from user buffers, or + * Data received from FW. + */ +static void se_dev_ctx_shared_mem_cleanup(struct se_if_device_ctx *dev_ctx) +{ + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; + struct list_head *pending_lists[] = {&se_shared_mem_mgmt->pending_in, + &se_shared_mem_mgmt->pending_out}; + struct se_buf_desc *b_desc, *temp; + int i; + + for (i = 0; i < 2; i++) { + list_for_each_entry_safe(b_desc, temp, + pending_lists[i], link) { + if (b_desc->shared_buf_ptr) + memset(b_desc->shared_buf_ptr, 0, b_desc->size); + + list_del(&b_desc->link); + kfree(b_desc); + } + } + se_shared_mem_mgmt->secure_mem.pos = 0; + se_shared_mem_mgmt->non_secure_mem.pos = 0; +} + +static int add_b_desc_to_pending_list(void *shared_ptr_with_pos, + struct se_ioctl_setup_iobuf *io, + struct se_if_device_ctx *dev_ctx) +{ + struct se_shared_mem_mgmt_info *se_shared_mem_mgmt = &dev_ctx->se_shared_mem_mgmt; + struct se_buf_desc *b_desc = NULL; + + b_desc = kzalloc(sizeof(*b_desc), GFP_KERNEL); + if (!b_desc) + return -ENOMEM; + + b_desc->shared_buf_ptr = shared_ptr_with_pos; + b_desc->usr_buf_ptr = io->user_buf; + b_desc->size = io->length; + + if (io->flags & SE_IO_BUF_FLAGS_IS_INPUT) { + /* + * buffer is input: + * add an entry in the "pending input buffers" list so + * that copied data can be cleaned from shared memory + * later. + */ + list_add_tail(&b_desc->link, &se_shared_mem_mgmt->pending_in); + } else { + /* + * buffer is output: + * add an entry in the "pending out buffers" list so data + * can be copied to user space when receiving Secure-Enclave + * response. + */ + list_add_tail(&b_desc->link, &se_shared_mem_mgmt->pending_out); + } + + return 0; +} + +/* interface for managed res to unregister a character device */ +static void if_misc_deregister(void *miscdevice) +{ + misc_deregister(miscdevice); +} + +static int init_device_context(struct se_if_priv *priv, int ch_id, + struct se_if_device_ctx **new_dev_ctx, + const struct file_operations *se_if_fops) +{ + struct se_if_device_ctx *dev_ctx; + int ret = 0; + + if (ch_id) + dev_ctx = kzalloc(sizeof(*dev_ctx), GFP_KERNEL); + else + dev_ctx = devm_kzalloc(priv->dev, sizeof(*dev_ctx), GFP_KERNEL); + + if (!dev_ctx) + return -ENOMEM; + + dev_ctx->priv = priv; + + if (ch_id) + dev_ctx->devname = kasprintf(GFP_KERNEL, "%s%d_ch%d", + get_se_if_name(priv->if_defs->se_if_type), + priv->if_defs->se_instance_id, + ch_id); + else + dev_ctx->devname = devm_kasprintf(priv->dev, GFP_KERNEL, "%s%d_ch%d", + get_se_if_name(priv->if_defs->se_if_type), + priv->if_defs->se_instance_id, + ch_id); + if (!dev_ctx->devname) { + if (ch_id) + kfree(dev_ctx); + + return -ENOMEM; + } + + mutex_init(&dev_ctx->fops_lock); + + *new_dev_ctx = dev_ctx; + + if (ch_id) { + list_add_tail(&dev_ctx->link, &priv->dev_ctx_list); + priv->active_devctx_count++; + + ret = init_se_shared_mem(dev_ctx); + if (ret < 0) { + kfree(dev_ctx->devname); + kfree(dev_ctx); + *new_dev_ctx = NULL; + return ret; + } + + return ret; + } + + /* Only for ch_id = 0: + * - register the misc device. + * - add action + */ + dev_ctx->miscdev = devm_kzalloc(priv->dev, sizeof(*dev_ctx->miscdev), GFP_KERNEL); + if (!dev_ctx->miscdev) { + *new_dev_ctx = NULL; + return -ENOMEM; + } + + dev_ctx->miscdev->name = dev_ctx->devname; + dev_ctx->miscdev->minor = MISC_DYNAMIC_MINOR; + dev_ctx->miscdev->fops = se_if_fops; + dev_ctx->miscdev->parent = priv->dev; + ret = misc_register(dev_ctx->miscdev); + if (ret) { + dev_err(priv->dev, "failed to register misc device %d\n", + ret); + return ret; + } + + ret = devm_add_action(priv->dev, if_misc_deregister, + dev_ctx->miscdev); + if (ret) { + dev_err(priv->dev, + "failed[%d] to add action to the misc-dev\n", + ret); + misc_deregister(dev_ctx->miscdev); + } + + return ret; +} + +static int se_ioctl_cmd_snd_rcv_rsp_handler(struct se_if_device_ctx *dev_ctx, + u64 arg) +{ + struct se_ioctl_cmd_snd_rcv_rsp_info cmd_snd_rcv_rsp_info = {0}; + struct se_if_priv *priv = dev_ctx->priv; + struct se_api_msg *tx_msg __free(kfree) = NULL; + struct se_api_msg *rx_msg __free(kfree) = NULL; + int err = 0; + + if (copy_from_user(&cmd_snd_rcv_rsp_info, (u8 __user *)arg, + sizeof(cmd_snd_rcv_rsp_info))) { + dev_err(priv->dev, + "%s: Failed to copy cmd_snd_rcv_rsp_info from user\n", + dev_ctx->devname); + err = -EFAULT; + goto exit; + } + + if (cmd_snd_rcv_rsp_info.tx_buf_sz < SE_MU_HDR_SZ) { + dev_err(priv->dev, + "%s: User buffer too small(%d < %d)\n", + dev_ctx->devname, + cmd_snd_rcv_rsp_info.tx_buf_sz, + SE_MU_HDR_SZ); + err = -ENOSPC; + goto exit; + } + + rx_msg = kzalloc(cmd_snd_rcv_rsp_info.rx_buf_sz, GFP_KERNEL); + if (!rx_msg) { + err = -ENOMEM; + goto exit; + } + + tx_msg = memdup_user(cmd_snd_rcv_rsp_info.tx_buf, + cmd_snd_rcv_rsp_info.tx_buf_sz); + if (IS_ERR(tx_msg)) { + err = PTR_ERR(tx_msg); + goto exit; + } + + if (tx_msg->header.tag != priv->if_defs->cmd_tag) { + err = -EINVAL; + goto exit; + } + + if (tx_msg->header.ver == priv->if_defs->fw_api_ver && + !get_load_fw_instance(priv)->is_fw_loaded) { + err = se_load_firmware(priv); + if (err) { + dev_err(priv->dev, "Could not send the message as FW is not loaded."); + err = -EPERM; + goto exit; + } + } + set_se_rcv_msg_timeout(SE_RCV_MSG_LONG_TIMEOUT); + + err = ele_msg_send_rcv(dev_ctx, + tx_msg, + cmd_snd_rcv_rsp_info.tx_buf_sz, + rx_msg, + cmd_snd_rcv_rsp_info.rx_buf_sz); + if (err < 0) + goto exit; + + dev_dbg(priv->dev, + "%s: %s %s\n", + dev_ctx->devname, + __func__, + "message received, start transmit to user"); + + /* We may need to copy the output data to user before + * delivering the completion message. + */ + err = se_dev_ctx_cpy_out_data(dev_ctx); + if (err < 0) + goto exit; + + /* Copy data from the buffer */ + print_hex_dump_debug("to user ", DUMP_PREFIX_OFFSET, 4, 4, + rx_msg, + cmd_snd_rcv_rsp_info.rx_buf_sz, false); + + if (copy_to_user(cmd_snd_rcv_rsp_info.rx_buf, rx_msg, + cmd_snd_rcv_rsp_info.rx_buf_sz)) { + dev_err(priv->dev, + "%s: Failed to copy to user\n", + dev_ctx->devname); + err = -EFAULT; + } + +exit: + + /* shared memory is allocated before this IOCTL */ + se_dev_ctx_shared_mem_cleanup(dev_ctx); + + if (copy_to_user((void __user *)arg, &cmd_snd_rcv_rsp_info, + sizeof(cmd_snd_rcv_rsp_info))) { + dev_err(priv->dev, + "%s: Failed to copy cmd_snd_rcv_rsp_info from user\n", + dev_ctx->devname); + err = -EFAULT; + } + + return err; +} + +static int se_ioctl_get_mu_info(struct se_if_device_ctx *dev_ctx, + u64 arg) +{ + struct se_if_priv *priv = dev_ctx->priv; + struct se_if_node *if_node; + struct se_ioctl_get_if_info if_info; + int err = 0; + + if_node = container_of(priv->if_defs, typeof(*if_node), if_defs); + + if_info.se_if_id = 0; + if_info.interrupt_idx = 0; + if_info.tz = 0; + if_info.did = if_node->se_if_did; + if_info.cmd_tag = priv->if_defs->cmd_tag; + if_info.rsp_tag = priv->if_defs->rsp_tag; + if_info.success_tag = priv->if_defs->success_tag; + if_info.base_api_ver = priv->if_defs->base_api_ver; + if_info.fw_api_ver = priv->if_defs->fw_api_ver; + + dev_dbg(priv->dev, + "%s: info [se_if_id: %d, irq_idx: %d, tz: 0x%x, did: 0x%x]\n", + dev_ctx->devname, + if_info.se_if_id, if_info.interrupt_idx, + if_info.tz, if_info.did); + + if (copy_to_user((u8 __user *)arg, &if_info, sizeof(if_info))) { + dev_err(priv->dev, + "%s: Failed to copy mu info to user\n", + dev_ctx->devname); + err = -EFAULT; + } + + return err; +} + +/* + * Copy a buffer of data to/from the user and return the address to use in + * messages + */ +static int se_ioctl_setup_iobuf_handler(struct se_if_device_ctx *dev_ctx, + u64 arg) +{ + struct se_shared_mem *shared_mem = NULL; + struct se_ioctl_setup_iobuf io = {0}; + int err = 0; + u32 pos; + + if (copy_from_user(&io, (u8 __user *)arg, sizeof(io))) { + dev_err(dev_ctx->priv->dev, + "%s: Failed copy iobuf config from user\n", + dev_ctx->devname); + return -EFAULT; + } + + dev_dbg(dev_ctx->priv->dev, + "%s: io [buf: %p(%d) flag: %x]\n", + dev_ctx->devname, + io.user_buf, io.length, io.flags); + + if (io.length == 0 || !io.user_buf) { + /* + * Accept NULL pointers since some buffers are optional + * in FW commands. In this case we should return 0 as + * pointer to be embedded into the message. + * Skip all data copy part of code below. + */ + io.ele_addr = 0; + goto copy; + } + + /* No specific requirement for this buffer. */ + shared_mem = &dev_ctx->se_shared_mem_mgmt.non_secure_mem; + + /* Check there is enough space in the shared memory. */ + dev_dbg(dev_ctx->priv->dev, + "%s: req_size = %d, max_size= %d, curr_pos = %d", + dev_ctx->devname, + round_up(io.length, 8u), + shared_mem->size, shared_mem->pos); + + if (shared_mem->size < shared_mem->pos || + round_up(io.length, 8u) > (shared_mem->size - shared_mem->pos)) { + dev_err(dev_ctx->priv->dev, + "%s: Not enough space in shared memory\n", + dev_ctx->devname); + return -ENOMEM; + } + + /* Allocate space in shared memory. 8 bytes aligned. */ + pos = shared_mem->pos; + shared_mem->pos += round_up(io.length, 8u); + io.ele_addr = (u64)shared_mem->dma_addr + pos; + + memset(shared_mem->ptr + pos, 0, io.length); + if ((io.flags & SE_IO_BUF_FLAGS_IS_INPUT) || + (io.flags & SE_IO_BUF_FLAGS_IS_IN_OUT)) { + /* + * buffer is input: + * copy data from user space to this allocated buffer. + */ + if (copy_from_user(shared_mem->ptr + pos, io.user_buf, + io.length)) { + dev_err(dev_ctx->priv->dev, + "%s: Failed copy data to shared memory\n", + dev_ctx->devname); + return -EFAULT; + } + } + + err = add_b_desc_to_pending_list(shared_mem->ptr + pos, + &io, + dev_ctx); + if (err < 0) + dev_err(dev_ctx->priv->dev, + "%s: Failed to allocate/link b_desc.", + dev_ctx->devname); + +copy: + /* Provide the EdgeLock Enclave address to user space only if success.*/ + if (copy_to_user((u8 __user *)arg, &io, sizeof(io))) { + dev_err(dev_ctx->priv->dev, + "%s: Failed to copy iobuff setup to user.", + dev_ctx->devname); + err = -EFAULT; + } + + return err; +} + +/* IOCTL to provide SoC information */ +static int se_ioctl_get_se_soc_info_handler(struct se_if_device_ctx *dev_ctx, + u64 arg) +{ + struct se_ioctl_get_soc_info soc_info; + int err = -EINVAL; + + soc_info.soc_id = get_se_soc_id(dev_ctx->priv); + soc_info.soc_rev = var_se_info.soc_rev; + + err = (int)copy_to_user((u8 __user *)arg, (u8 *)(&soc_info), sizeof(soc_info)); + if (err) { + dev_err(dev_ctx->priv->dev, + "%s: Failed to copy soc info to user\n", + dev_ctx->devname); + err = -EFAULT; + } + + return err; +} + +/* + * File operations for user-space + */ + +/* Write a message to the MU. */ +static ssize_t se_if_fops_write(struct file *fp, const char __user *buf, + size_t size, loff_t *ppos) +{ + struct se_if_device_ctx *dev_ctx = fp->private_data; + struct se_api_msg *tx_msg __free(kfree) = NULL; + struct se_if_priv *priv = dev_ctx->priv; + int err; + + dev_dbg(priv->dev, + "%s: write from buf (%p)%zu, ppos=%lld\n", + dev_ctx->devname, + buf, size, ((ppos) ? *ppos : 0)); + + if (mutex_lock_interruptible(&dev_ctx->fops_lock)) + return -EBUSY; + + if (dev_ctx != priv->cmd_receiver_clbk_hdl.dev_ctx) { + err = -EINVAL; + goto exit; + } + + if (size < SE_MU_HDR_SZ) { + dev_err(priv->dev, + "%s: User buffer too small(%zu < %d)\n", + dev_ctx->devname, + size, SE_MU_HDR_SZ); + err = -ENOSPC; + goto exit; + } + + tx_msg = memdup_user(buf, size); + if (IS_ERR(tx_msg)) { + err = PTR_ERR(tx_msg); + goto exit; + } + + print_hex_dump_debug("from user ", DUMP_PREFIX_OFFSET, 4, 4, + tx_msg, size, false); + + err = ele_msg_send(dev_ctx, tx_msg, size); + +exit: + mutex_unlock(&dev_ctx->fops_lock); + return err; +} + +/* + * Read a message from the MU. + * Blocking until a message is available. + */ +static ssize_t se_if_fops_read(struct file *fp, char __user *buf, + size_t size, loff_t *ppos) +{ + struct se_if_device_ctx *dev_ctx = fp->private_data; + struct se_if_priv *priv = dev_ctx->priv; + int err; + + dev_dbg(priv->dev, + "%s: read to buf %p(%zu), ppos=%lld\n", + dev_ctx->devname, + buf, size, ((ppos) ? *ppos : 0)); + + if (mutex_lock_interruptible(&dev_ctx->fops_lock)) + return -EBUSY; + + if (dev_ctx != priv->cmd_receiver_clbk_hdl.dev_ctx) { + err = -EINVAL; + goto exit; + } + + err = ele_msg_rcv(dev_ctx, &priv->cmd_receiver_clbk_hdl); + if (err < 0) { + dev_err(priv->dev, + "%s: Err[0x%x]:Interrupted by signal.\n", + dev_ctx->devname, err); + dev_dbg(priv->dev, + "Current active dev-ctx count = %d.\n", + dev_ctx->priv->active_devctx_count); + goto exit; + } + + /* We may need to copy the output data to user before + * delivering the completion message. + */ + err = se_dev_ctx_cpy_out_data(dev_ctx); + if (err < 0) + goto exit; + + /* Copy data from the buffer */ + print_hex_dump_debug("to user ", DUMP_PREFIX_OFFSET, 4, 4, + priv->cmd_receiver_clbk_hdl.rx_msg, + priv->cmd_receiver_clbk_hdl.rx_msg_sz, + false); + + if (copy_to_user(buf, priv->cmd_receiver_clbk_hdl.rx_msg, + priv->cmd_receiver_clbk_hdl.rx_msg_sz)) { + dev_err(priv->dev, + "%s: Failed to copy to user\n", + dev_ctx->devname); + err = -EFAULT; + } + err = priv->cmd_receiver_clbk_hdl.rx_msg_sz; +exit: + priv->cmd_receiver_clbk_hdl.rx_msg_sz = 0; + + se_dev_ctx_shared_mem_cleanup(dev_ctx); + + mutex_unlock(&dev_ctx->fops_lock); + return err; +} + +/* Open a character device. */ +static int se_if_fops_open(struct inode *nd, struct file *fp) +{ + struct miscdevice *miscdev = fp->private_data; + struct se_if_priv *priv = dev_get_drvdata(miscdev->parent); + struct se_if_device_ctx *misc_dev_ctx = priv->priv_dev_ctx; + struct se_if_device_ctx *dev_ctx; + int err = 0; + + if (mutex_lock_interruptible(&misc_dev_ctx->fops_lock)) + return -EBUSY; + + priv->dev_ctx_mono_count++; + err = init_device_context(priv, + priv->dev_ctx_mono_count ? + priv->dev_ctx_mono_count + : priv->dev_ctx_mono_count++, + &dev_ctx, NULL); + if (err) + dev_err(priv->dev, + "Failed[0x%x] to create device contexts.\n", + err); + else + fp->private_data = dev_ctx; + + mutex_unlock(&misc_dev_ctx->fops_lock); + return err; +} + +/* Close a character device. */ +static int se_if_fops_close(struct inode *nd, struct file *fp) +{ + struct se_if_device_ctx *dev_ctx = fp->private_data; + struct se_if_priv *priv = dev_ctx->priv; + + if (mutex_lock_interruptible(&dev_ctx->fops_lock)) + return -EBUSY; + + /* check if this device was registered as command receiver. */ + if (priv->cmd_receiver_clbk_hdl.dev_ctx == dev_ctx) { + priv->cmd_receiver_clbk_hdl.dev_ctx = NULL; + kfree(priv->cmd_receiver_clbk_hdl.rx_msg); + priv->cmd_receiver_clbk_hdl.rx_msg = NULL; + } + + se_dev_ctx_shared_mem_cleanup(dev_ctx); + cleanup_se_shared_mem(dev_ctx); + + priv->active_devctx_count--; + list_del(&dev_ctx->link); + + mutex_unlock(&dev_ctx->fops_lock); + kfree(dev_ctx->devname); + kfree(dev_ctx); + + return 0; +} + +/* IOCTL entry point of a character device */ +static long se_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) +{ + struct se_if_device_ctx *dev_ctx = fp->private_data; + struct se_if_priv *priv = dev_ctx->priv; + int err; + + /* Prevent race during change of device context */ + if (mutex_lock_interruptible(&dev_ctx->fops_lock)) + return -EBUSY; + + switch (cmd) { + case SE_IOCTL_ENABLE_CMD_RCV: + if (!priv->cmd_receiver_clbk_hdl.dev_ctx) { + if (!priv->cmd_receiver_clbk_hdl.rx_msg) { + priv->cmd_receiver_clbk_hdl.rx_msg = + kzalloc(MAX_NVM_MSG_LEN, + GFP_KERNEL); + if (!priv->cmd_receiver_clbk_hdl.rx_msg) { + err = -ENOMEM; + break; + } + } + priv->cmd_receiver_clbk_hdl.rx_msg_sz = MAX_NVM_MSG_LEN; + priv->cmd_receiver_clbk_hdl.dev_ctx = dev_ctx; + err = 0; + } else { + err = -EBUSY; + } + break; + case SE_IOCTL_GET_MU_INFO: + err = se_ioctl_get_mu_info(dev_ctx, arg); + break; + case SE_IOCTL_SETUP_IOBUF: + err = se_ioctl_setup_iobuf_handler(dev_ctx, arg); + break; + case SE_IOCTL_GET_SOC_INFO: + err = se_ioctl_get_se_soc_info_handler(dev_ctx, arg); + break; + case SE_IOCTL_CMD_SEND_RCV_RSP: + err = se_ioctl_cmd_snd_rcv_rsp_handler(dev_ctx, arg); + break; + default: + err = -EINVAL; + dev_dbg(priv->dev, + "%s: IOCTL %.8x not supported\n", + dev_ctx->devname, + cmd); + } + + mutex_unlock(&dev_ctx->fops_lock); + + return (long)err; +} + +/* Char driver setup */ +static const struct file_operations se_if_fops = { + .open = se_if_fops_open, + .owner = THIS_MODULE, + .release = se_if_fops_close, + .unlocked_ioctl = se_ioctl, + .read = se_if_fops_read, + .write = se_if_fops_write, +}; + /* interface for managed res to free a mailbox channel */ static void if_mbox_free_channel(void *mbox_chan) { @@ -321,6 +1074,7 @@ static int se_if_request_channel(struct device *dev, static void se_if_probe_cleanup(void *plat_dev) { + struct se_if_device_ctx *dev_ctx, *t_dev_ctx; struct platform_device *pdev = plat_dev; struct device *dev = &pdev->dev; struct se_fw_load_info *load_fw; @@ -345,6 +1099,13 @@ static void se_if_probe_cleanup(void *plat_dev) load_fw->imem.buf = NULL; } + if (priv->dev_ctx_mono_count) { + list_for_each_entry_safe(dev_ctx, t_dev_ctx, &priv->dev_ctx_list, link) { + list_del(&dev_ctx->link); + priv->active_devctx_count--; + } + } + /* No need to check, if reserved memory is allocated * before calling for its release. Or clearing the * un-set bit. @@ -410,6 +1171,7 @@ static int se_if_probe(struct platform_device *pdev) "Unable to get sram pool = %s.", if_node->pool_name); } + INIT_LIST_HEAD(&priv->dev_ctx_list); if (if_node->reserved_dma_ranges) { ret = of_reserved_mem_device_init(dev); @@ -418,6 +1180,12 @@ static int se_if_probe(struct platform_device *pdev) "Failed to init reserved memory region."); } + ret = init_device_context(priv, 0, &priv->priv_dev_ctx, &se_if_fops); + if (ret) + return dev_err_probe(dev, ret, + "Failed[0x%x] to create device contexts.", + ret); + if (if_node->if_defs.se_if_type == SE_TYPE_ID_HSM) { ret = get_se_soc_info(priv, se_info); if (ret) @@ -444,7 +1212,7 @@ static int se_if_probe(struct platform_device *pdev) } } dev_info(dev, "i.MX secure-enclave: %s%d interface to firmware, configured.", - SE_TYPE_STR_HSM, + get_se_if_name(priv->if_defs->se_if_type), priv->if_defs->se_instance_id); return ret; @@ -461,6 +1229,7 @@ static int se_suspend(struct device *dev) struct se_fw_load_info *load_fw; int ret = 0; + set_se_rcv_msg_timeout(SE_RCV_MSG_DEFAULT_TIMEOUT); load_fw = get_load_fw_instance(priv); if (load_fw->imem_mgmt) diff --git a/drivers/firmware/imx/se_ctrl.h b/drivers/firmware/imx/se_ctrl.h index 32547bc97ca3..c103563091d5 100644 --- a/drivers/firmware/imx/se_ctrl.h +++ b/drivers/firmware/imx/se_ctrl.h @@ -13,6 +13,7 @@ #define MAX_FW_LOAD_RETRIES 50 #define RES_STATUS(x) FIELD_GET(0x000000ff, x) +#define MAX_DATA_SIZE_PER_USER (65 * 1024) #define MAX_NVM_MSG_LEN (256) #define MESSAGING_VERSION_6 0x6 #define MESSAGING_VERSION_7 0x7 @@ -20,6 +21,7 @@ struct se_clbk_handle { struct completion done; bool signal_rcvd; + struct se_if_device_ctx *dev_ctx; u32 rx_msg_sz; /* Assignment of the rx_msg buffer to held till the * received content as part callback function, is copied. @@ -34,6 +36,41 @@ struct se_imem_buf { u32 state; }; +struct se_buf_desc { + u8 *shared_buf_ptr; + void __user *usr_buf_ptr; + u32 size; + struct list_head link; +}; + +struct se_shared_mem { + dma_addr_t dma_addr; + u32 size; + u32 pos; + u8 *ptr; +}; + +struct se_shared_mem_mgmt_info { + struct list_head pending_in; + struct list_head pending_out; + + struct se_shared_mem secure_mem; + struct se_shared_mem non_secure_mem; +}; + +/* Private struct for each char device instance. */ +struct se_if_device_ctx { + struct se_if_priv *priv; + struct miscdevice *miscdev; + const char *devname; + + /* process one file operation at a time. */ + struct mutex fops_lock; + + struct se_shared_mem_mgmt_info se_shared_mem_mgmt; + struct list_head link; +}; + /* Header of the messages exchange with the EdgeLock Enclave */ struct se_msg_hdr { u8 ver; @@ -78,6 +115,12 @@ struct se_if_priv { struct gen_pool *mem_pool; const struct se_if_defines *if_defs; + + struct se_if_device_ctx *priv_dev_ctx; + struct list_head dev_ctx_list; + u32 active_devctx_count; + u32 dev_ctx_mono_count; }; +char *get_se_if_name(u8 se_if_id); #endif diff --git a/include/uapi/linux/se_ioctl.h b/include/uapi/linux/se_ioctl.h new file mode 100644 index 000000000000..29a9b1ec5ec3 --- /dev/null +++ b/include/uapi/linux/se_ioctl.h @@ -0,0 +1,101 @@ +/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause*/ +/* + * Copyright 2025 NXP + */ + +#ifndef SE_IOCTL_H +#define SE_IOCTL_H + +#include <linux/types.h> + +#define SE_TYPE_STR_DBG "dbg" +#define SE_TYPE_STR_HSM "hsm" +#define SE_TYPE_ID_UNKWN 0x0 +#define SE_TYPE_ID_DBG 0x1 +#define SE_TYPE_ID_HSM 0x2 +/* IOCTL definitions. */ + +struct se_ioctl_setup_iobuf { + void __user *user_buf; + __u32 length; + __u32 flags; + __u64 ele_addr; +}; + +struct se_ioctl_shared_mem_cfg { + __u32 base_offset; + __u32 size; +}; + +struct se_ioctl_get_if_info { + __u8 se_if_id; + __u8 interrupt_idx; + __u8 tz; + __u8 did; + __u8 cmd_tag; + __u8 rsp_tag; + __u8 success_tag; + __u8 base_api_ver; + __u8 fw_api_ver; +}; + +struct se_ioctl_cmd_snd_rcv_rsp_info { + __u32 __user *tx_buf; + int tx_buf_sz; + __u32 __user *rx_buf; + int rx_buf_sz; +}; + +struct se_ioctl_get_soc_info { + __u16 soc_id; + __u16 soc_rev; +}; + +/* IO Buffer Flags */ +#define SE_IO_BUF_FLAGS_IS_OUTPUT (0x00u) +#define SE_IO_BUF_FLAGS_IS_INPUT (0x01u) +#define SE_IO_BUF_FLAGS_USE_SEC_MEM (0x02u) +#define SE_IO_BUF_FLAGS_USE_SHORT_ADDR (0x04u) +#define SE_IO_BUF_FLAGS_IS_IN_OUT (0x10u) + +/* IOCTLS */ +#define SE_IOCTL 0x0A /* like MISC_MAJOR. */ + +/* + * ioctl to designated the current fd as logical-reciever. + * This is ioctl is send when the nvm-daemon, a slave to the + * firmware is started by the user. + */ +#define SE_IOCTL_ENABLE_CMD_RCV _IO(SE_IOCTL, 0x01) + +/* + * ioctl to get the buffer allocated from the memory, which is shared + * between kernel and FW. + * Post allocation, the kernel tagged the allocated memory with: + * Output + * Input + * Input-Output + * Short address + * Secure-memory + */ +#define SE_IOCTL_SETUP_IOBUF _IOWR(SE_IOCTL, 0x03, \ + struct se_ioctl_setup_iobuf) + +/* + * ioctl to get the mu information, that is used to exchange message + * with FW, from user-spaced. + */ +#define SE_IOCTL_GET_MU_INFO _IOR(SE_IOCTL, 0x04, \ + struct se_ioctl_get_if_info) +/* + * ioctl to get SoC Info from user-space. + */ +#define SE_IOCTL_GET_SOC_INFO _IOR(SE_IOCTL, 0x06, \ + struct se_ioctl_get_soc_info) + +/* + * ioctl to send command and receive response from user-space. + */ +#define SE_IOCTL_CMD_SEND_RCV_RSP _IOWR(SE_IOCTL, 0x07, \ + struct se_ioctl_cmd_snd_rcv_rsp_info) +#endif
Adds the driver for communication interface to secure-enclave, for exchanging messages with NXP secure enclave HW IP(s) like EdgeLock Enclave from: - User-Space Applications via character driver. ABI documentation for the NXP secure-enclave driver. User-space library using this driver: - i.MX Secure Enclave library: -- URL: https://github.com/nxp-imx/imx-secure-enclave.git, - i.MX Secure Middle-Ware: -- URL: https://github.com/nxp-imx/imx-smw.git Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com> --- Documentation/ABI/testing/se-cdev | 43 ++ drivers/firmware/imx/ele_base_msg.c | 11 +- drivers/firmware/imx/ele_common.c | 77 +++- drivers/firmware/imx/ele_common.h | 10 +- drivers/firmware/imx/se_ctrl.c | 775 +++++++++++++++++++++++++++++++++++- drivers/firmware/imx/se_ctrl.h | 43 ++ include/uapi/linux/se_ioctl.h | 101 +++++ 7 files changed, 1029 insertions(+), 31 deletions(-)