> -----Original Message----- > From: Amit Singh Tomar <amitsinght@xxxxxxxxxxx> > Sent: Saturday, May 11, 2024 1:09 AM > To: Frank Li <frank.li@xxxxxxx>; Pankaj Gupta <pankaj.gupta@xxxxxxx> > Cc: Jonathan Corbet <corbet@xxxxxxx>; Rob Herring <robh+dt@xxxxxxxxxx>; > Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>; Conor Dooley > <conor+dt@xxxxxxxxxx>; Shawn Guo <shawnguo@xxxxxxxxxx>; Sascha Hauer > <s.hauer@xxxxxxxxxxxxxx>; Pengutronix Kernel Team > <kernel@xxxxxxxxxxxxxx>; Fabio Estevam <festevam@xxxxxxxxx>; linux- > doc@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > devicetree@xxxxxxxxxxxxxxx; imx@xxxxxxxxxxxxxxx; linux-arm- > kernel@xxxxxxxxxxxxxxxxxxx > Subject: [EXT] Re: [PATCH 4/4] firmware: imx: add driver for NXP EdgeLock > Enclave > > Caution: This is an external email. Please take care when clicking links or > opening attachments. When in doubt, report the message using the 'Report > this email' button > > > Hi, > > > > ---------------------------------------------------------------------- > > On Fri, May 10, 2024 at 06:57:30PM +0530, Pankaj Gupta wrote: > >> NXP hardware IP(s) for secure-enclaves like Edgelock Enclave(ELE), > >> are embedded in the SoC to support the features like HSM, SHE & V2X, > >> using message based communication interface. > >> > >> The secure enclave FW communicates on a dedicated messaging unit(MU) > >> based interface(s) with application core, where kernel is running. > >> It exists on specific i.MX processors. e.g. i.MX8ULP, i.MX93. > >> > >> This patch adds the driver for communication interface to secure-enclave, > >> for exchanging messages with NXP secure enclave HW IP(s) like EdgeLock > Enclave, > >> both from: > >> - User-Space Applications via character driver. > >> - Kernel-space, used by kernel management layers like DM-Crypt. > >> > >> ABI documentation for the NXP secure-enclave driver. > >> > >> User-space library using this driver: > >> - i.MX Secure Enclave library: > >> -- URL: > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefe > nse.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__github.com_nxp- > 2Dimx_imx-2Dsecure- > 2Denclave.git%26d%3DDwICAg%26c%3DnKjWec2b6R0mOyPaz7xtfQ%26r%3 > DV_GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A- > JKU%26m%3DeKFfdy51aVVEAe4I9Lk2CN77y_4Hxf2pI_9fv5pVWLo9DwQNgC > pca6smAwvwFycf%26s%3DIfKbvjSfdUcqz- > WEWdhbj1_TnqGryOffX1dV0T5Rf_A%26e%3D&data=05%7C02%7Cpankaj.gu > pta%40nxp.com%7C111dd89e61f149b5f7e708dc71290348%7C686ea1d3bc2 > b4c6fa92cd99c5c301635%7C0%7C0%7C638509668202231639%7CUnknown > %7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haW > wiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=FEt3DR2WBF3v8fNgnliJhVB10 > MCCkaf8KYGmLz3fk3A%3D&reserved=0 , > >> - i.MX Secure Middle-Ware: > >> -- URL: > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefe > nse.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__github.com_nxp- > 2Dimx_imx- > 2Dsmw.git%26d%3DDwICAg%26c%3DnKjWec2b6R0mOyPaz7xtfQ%26r%3DV > _GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A- > JKU%26m%3DeKFfdy51aVVEAe4I9Lk2CN77y_4Hxf2pI_9fv5pVWLo9DwQNgC > pca6smAwvwFycf%26s%3DLLz2plXTM1AS- > zJ1HlZRKiBE8GmRJBduR_0dnOuFjRo%26e%3D&data=05%7C02%7Cpankaj.gu > pta%40nxp.com%7C111dd89e61f149b5f7e708dc71290348%7C686ea1d3bc2 > b4c6fa92cd99c5c301635%7C0%7C0%7C638509668202240209%7CUnknown > %7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haW > wiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=YOBEbhRl7XJeLu%2BdaznovR > 4lDrbyoOlmxUP9BiYZ330%3D&reserved=0 > >> > >> Signed-off-by: Pankaj Gupta <pankaj.gupta@xxxxxxx> > >> --- > >> Documentation/ABI/testing/se-cdev | 42 ++ > >> drivers/firmware/imx/Kconfig | 12 + > >> drivers/firmware/imx/Makefile | 2 + > >> drivers/firmware/imx/ele_base_msg.c | 287 ++++++++ > >> drivers/firmware/imx/ele_base_msg.h | 70 ++ > >> drivers/firmware/imx/ele_common.c | 341 +++++++++ > >> drivers/firmware/imx/ele_common.h | 43 ++ > >> drivers/firmware/imx/se_ctrl.c | 1339 > +++++++++++++++++++++++++++++++++++ > >> drivers/firmware/imx/se_ctrl.h | 151 ++++ > >> include/linux/firmware/imx/se_api.h | 14 + > >> include/uapi/linux/se_ioctl.h | 88 +++ > >> 11 files changed, 2389 insertions(+) > >> > >> diff --git a/Documentation/ABI/testing/se-cdev > b/Documentation/ABI/testing/se-cdev > >> new file mode 100644 > >> index 000000000000..699525af6b86 > >> --- /dev/null > >> +++ b/Documentation/ABI/testing/se-cdev > >> @@ -0,0 +1,42 @@ > >> +What: /dev/<se>_mu[0-9]+_ch[0-9]+ > >> +Date: May 2024 > >> +KernelVersion: 6.8 > >> +Contact: linux-imx@xxxxxxx, pankaj.gupta@xxxxxxx > >> +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 user-space 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 > >> + - get mu info > >> + - setting a dev-ctx as receiver that is slave to fw > >> + - get SoC info > >> + > >> + 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 > >> + wakeup_intruptible, 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 free up the I/O contexts that was associated > >> + with the file descriptor. > >> + > >> +Users: > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefe > nse.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__github.com_nxp- > 2Dimx_imx-2Dsecure- > 2Denclave.git%26d%3DDwICAg%26c%3DnKjWec2b6R0mOyPaz7xtfQ%26r%3 > DV_GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A- > JKU%26m%3DeKFfdy51aVVEAe4I9Lk2CN77y_4Hxf2pI_9fv5pVWLo9DwQNgC > pca6smAwvwFycf%26s%3DIfKbvjSfdUcqz- > WEWdhbj1_TnqGryOffX1dV0T5Rf_A%26e%3D&data=05%7C02%7Cpankaj.gu > pta%40nxp.com%7C111dd89e61f149b5f7e708dc71290348%7C686ea1d3bc2 > b4c6fa92cd99c5c301635%7C0%7C0%7C638509668202246211%7CUnknown > %7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haW > wiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=5Cpw4sCLsKzv%2FRiikt2aA4d > ILonYXeFzcnMo4UugdQ4%3D&reserved=0 , > >> + > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefe > nse.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__github.com_nxp- > 2Dimx_imx- > 2Dsmw.git%26d%3DDwICAg%26c%3DnKjWec2b6R0mOyPaz7xtfQ%26r%3DV > _GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A- > JKU%26m%3DeKFfdy51aVVEAe4I9Lk2CN77y_4Hxf2pI_9fv5pVWLo9DwQNgC > pca6smAwvwFycf%26s%3DLLz2plXTM1AS- > zJ1HlZRKiBE8GmRJBduR_0dnOuFjRo%26e%3D&data=05%7C02%7Cpankaj.gu > pta%40nxp.com%7C111dd89e61f149b5f7e708dc71290348%7C686ea1d3bc2 > b4c6fa92cd99c5c301635%7C0%7C0%7C638509668202250817%7CUnknown > %7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haW > wiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=m5NZLmshBmqnnbb2U%2Bm > cMYYbv7LS8X%2ByzMVTs%2BI7tkI%3D&reserved=0 > >> + crypto/skcipher, > >> + drivers/nvmem/imx-ocotp-ele.c > >> diff --git a/drivers/firmware/imx/Kconfig b/drivers/firmware/imx/Kconfig > >> index 183613f82a11..56bdca9bd917 100644 > >> --- a/drivers/firmware/imx/Kconfig > >> +++ b/drivers/firmware/imx/Kconfig > >> @@ -22,3 +22,15 @@ config IMX_SCU > >> > >> This driver manages the IPC interface between host CPU and the > >> SCU firmware running on M4. > >> + > >> +config IMX_SEC_ENCLAVE > >> + tristate "i.MX Embedded Secure Enclave - EdgeLock Enclave Firmware > driver." > >> + depends on IMX_MBOX && ARCH_MXC && ARM64 > >> + default m if ARCH_MXC > >> + > >> + help > >> + It is possible to use APIs exposed by the iMX Secure Enclave HW IP > called: > >> + - EdgeLock Enclave Firmware (for i.MX8ULP, i.MX93), > >> + like base, HSM, V2X & SHE using the SAB protocol via the shared > Messaging > >> + Unit. This driver exposes these interfaces via a set of file descriptors > >> + allowing to configure shared memory, send and receive messages. > >> diff --git a/drivers/firmware/imx/Makefile > b/drivers/firmware/imx/Makefile > >> index 8f9f04a513a8..aa9033e0e9e3 100644 > >> --- a/drivers/firmware/imx/Makefile > >> +++ b/drivers/firmware/imx/Makefile > >> @@ -1,3 +1,5 @@ > >> # SPDX-License-Identifier: GPL-2.0 > >> obj-$(CONFIG_IMX_DSP) += imx-dsp.o > >> obj-$(CONFIG_IMX_SCU) += imx-scu.o misc.o imx-scu-irq.o rm.o > imx-scu-soc.o > >> +sec_enclave-objs = se_ctrl.o ele_common.o ele_base_msg.o > >> +obj-${CONFIG_IMX_SEC_ENCLAVE} += sec_enclave.o > >> diff --git a/drivers/firmware/imx/ele_base_msg.c > b/drivers/firmware/imx/ele_base_msg.c > >> new file mode 100644 > >> index 000000000000..0463f26d93c7 > >> --- /dev/null > >> +++ b/drivers/firmware/imx/ele_base_msg.c > >> @@ -0,0 +1,287 @@ > >> +// SPDX-License-Identifier: GPL-2.0+ > >> +/* > >> + * Copyright 2024 NXP > >> + */ > >> + > >> +#include <linux/types.h> > >> +#include <linux/completion.h> > >> +#include <linux/dma-mapping.h> > >> + > >> +#include "ele_base_msg.h" > >> +#include "ele_common.h" > >> + > >> +int ele_get_info(struct device *dev, struct soc_info *s_info) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev); > >> + struct se_api_msg *tx_msg __free(kfree); > >> + struct se_api_msg *rx_msg __free(kfree); > >> + phys_addr_t get_info_addr; > >> + u32 *get_info_data; > >> + u32 status; > >> + int ret; > >> + > >> + if (!priv || !s_info) > >> + goto exit; > >> + > >> + memset(s_info, 0x0, sizeof(*s_info)); > >> + > >> + if (priv->mem_pool_name) > >> + get_info_data = get_phy_buf_mem_pool(dev, > >> + priv->mem_pool_name, > >> + &get_info_addr, > >> + ELE_GET_INFO_BUFF_SZ); > >> + else > >> + get_info_data = dmam_alloc_coherent(dev, > >> + ELE_GET_INFO_BUFF_SZ, > >> + &get_info_addr, > >> + GFP_KERNEL); > >> + if (!get_info_data) { > >> + ret = -ENOMEM; > >> + dev_err(dev, > >> + "%s: Failed to allocate get_info_addr.\n", > >> + __func__); > >> + goto exit; > >> + } > >> + > >> + tx_msg = kzalloc(ELE_GET_INFO_REQ_MSG_SZ << 2, GFP_KERNEL); > >> + if (!tx_msg) { > >> + ret = -ENOMEM; > >> + return ret; > It seems like you intended to use goto exit; instead of returning > directly from here. This would ensure that you can free the buffer > allocated with get_phy_buf_mem_pool in case of an allocation failure. Accepted. > >> + } > >> + > >> + rx_msg = kzalloc(ELE_GET_INFO_RSP_MSG_SZ << 2, GFP_KERNEL); > >> + if (!rx_msg) { > >> + ret = -ENOMEM; > >> + return ret; > >> + } Will correct here as well. > >> + > >> + ret = plat_fill_cmd_msg_hdr(priv, > >> + (struct se_msg_hdr *)&tx_msg->header, > >> + ELE_GET_INFO_REQ, > >> + ELE_GET_INFO_REQ_MSG_SZ, > >> + true); > >> + if (ret) > >> + goto exit; > >> + > >> + tx_msg->data[0] = upper_32_bits(get_info_addr); > >> + tx_msg->data[1] = lower_32_bits(get_info_addr); > >> + tx_msg->data[2] = ELE_GET_INFO_READ_SZ; > >> + priv->rx_msg = rx_msg; > >> + ret = imx_ele_msg_send_rcv(priv, tx_msg); > >> + if (ret < 0) > >> + goto exit; > >> + > >> + ret = validate_rsp_hdr(priv, > >> + priv->rx_msg->header, > >> + ELE_GET_INFO_REQ, > >> + ELE_GET_INFO_RSP_MSG_SZ, > >> + true); > >> + if (ret) > >> + goto exit; > >> + > >> + status = RES_STATUS(priv->rx_msg->data[0]); > >> + if (status != priv->success_tag) { > >> + dev_err(dev, "Command Id[%d], Response Failure = 0x%x", > >> + ELE_GET_INFO_REQ, status); > >> + ret = -1; > >> + } > >> + > >> + s_info->imem_state = (get_info_data[ELE_IMEM_STATE_WORD] > >> + & ELE_IMEM_STATE_MASK) >> 16; > >> + s_info->major_ver = > (get_info_data[GET_INFO_SOC_INFO_WORD_OFFSET] > >> + & SOC_VER_MASK) >> 24; > >> + s_info->minor_ver = > ((get_info_data[GET_INFO_SOC_INFO_WORD_OFFSET] > >> + & SOC_VER_MASK) >> 16) & 0xFF; > >> + s_info->soc_rev = > (get_info_data[GET_INFO_SOC_INFO_WORD_OFFSET] > >> + & SOC_VER_MASK) >> 16; > >> + s_info->soc_id = get_info_data[GET_INFO_SOC_INFO_WORD_OFFSET] > >> + & SOC_ID_MASK; > >> + s_info->serial_num > >> + = (u64)get_info_data[GET_INFO_SL_NUM_MSB_WORD_OFF] << > 32 > >> + | get_info_data[GET_INFO_SL_NUM_LSB_WORD_OFF]; > >> +exit: > >> + if (get_info_addr) { > >> + if (priv->mem_pool_name) > >> + free_phybuf_mem_pool(dev, priv->mem_pool_name, > >> + get_info_data, ELE_GET_INFO_BUFF_SZ); > >> + else > >> + dmam_free_coherent(dev, > >> + ELE_GET_INFO_BUFF_SZ, > >> + get_info_data, > >> + get_info_addr); > >> + } > >> + > >> + return ret; > >> +} > >> + > >> +int ele_ping(struct device *dev) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev); > >> + struct se_api_msg *tx_msg __free(kfree); > >> + struct se_api_msg *rx_msg __free(kfree); > > > > If you want __free(kfree) it should be > > > > struct se_api_msg *tx_msg __free(kfree) = NULL; > > struct se_api_msg *rx_msg __free(kfree) = NULL; > > > > Or > > > > struct se_api_msg *tx_msg __free(kfree) = kzalloc(ELE_PING_REQ_SZ << 2, > GFP_KERNEL) > > struct se_api_msg *rx_msg __free(kfree) = kzalloc(ELE_PING_RSP_SZ << 2, > GFP_KERNEL) > > > > otherwise when > > if (!tx_msg) { > > return ret; > > > > ^^ when go here, rx_msg is random value. So kfree(rx_msg) will > > access random address. > > > > } > > > >> + u32 status; > >> + int ret; > >> + > >> + tx_msg = kzalloc(ELE_PING_REQ_SZ << 2, GFP_KERNEL); > >> + if (!tx_msg) { > >> + ret = -ENOMEM; > >> + return ret; > > > > > > return -ENOMEM > > > > Frank > > > >> + } > >> + > >> + rx_msg = kzalloc(ELE_PING_RSP_SZ << 2, GFP_KERNEL); > >> + if (!rx_msg) { > >> + ret = -ENOMEM; > >> + return ret; > >> + } > >> + > >> + ret = plat_fill_cmd_msg_hdr(priv, > >> + (struct se_msg_hdr *)&tx_msg->header, > >> + ELE_PING_REQ, ELE_PING_REQ_SZ, > >> + true); > >> + if (ret) { > >> + dev_err(dev, "Error: plat_fill_cmd_msg_hdr failed.\n"); > >> + goto exit; > >> + } > >> + > >> + priv->rx_msg = rx_msg; > >> + ret = imx_ele_msg_send_rcv(priv, tx_msg); > >> + if (ret) > >> + goto exit; > >> + > >> + ret = validate_rsp_hdr(priv, > >> + priv->rx_msg->header, > >> + ELE_PING_REQ, > >> + ELE_PING_RSP_SZ, > >> + true); > >> + if (ret) > >> + goto exit; > >> + > >> + status = RES_STATUS(priv->rx_msg->data[0]); > >> + if (status != priv->success_tag) { > >> + dev_err(dev, "Command Id[%d], Response Failure = 0x%x", > >> + ELE_PING_REQ, status); > >> + ret = -1; > >> + } > >> +exit: > >> + return ret; > >> +} > >> + > >> +int ele_service_swap(struct device *dev, > >> + phys_addr_t addr, > >> + u32 addr_size, u16 flag) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev); > >> + struct se_api_msg *tx_msg __free(kfree); > >> + struct se_api_msg *rx_msg __free(kfree); > >> + u32 status; > >> + int ret; > >> + > >> + tx_msg = kzalloc(ELE_SERVICE_SWAP_REQ_MSG_SZ << 2, > GFP_KERNEL); > >> + if (!tx_msg) { > >> + ret = -ENOMEM; > >> + return ret; > >> + } > >> + > >> + rx_msg = kzalloc(ELE_SERVICE_SWAP_RSP_MSG_SZ << 2, > GFP_KERNEL); > >> + if (!rx_msg) { > >> + ret = -ENOMEM; > >> + return ret; > >> + } > >> + > >> + ret = plat_fill_cmd_msg_hdr(priv, > >> + (struct se_msg_hdr *)&tx_msg->header, > >> + ELE_SERVICE_SWAP_REQ, > >> + ELE_SERVICE_SWAP_REQ_MSG_SZ, > >> + true); > >> + if (ret) > >> + goto exit; > >> + > >> + tx_msg->data[0] = flag; > >> + tx_msg->data[1] = addr_size; > >> + tx_msg->data[2] = ELE_NONE_VAL; > >> + tx_msg->data[3] = lower_32_bits(addr); > >> + tx_msg->data[4] = plat_add_msg_crc((uint32_t *)&tx_msg[0], > >> + ELE_SERVICE_SWAP_REQ_MSG_SZ); > >> + priv->rx_msg = rx_msg; > >> + ret = imx_ele_msg_send_rcv(priv, tx_msg); > >> + if (ret < 0) > >> + goto exit; > >> + > >> + ret = validate_rsp_hdr(priv, > >> + priv->rx_msg->header, > >> + ELE_SERVICE_SWAP_REQ, > >> + ELE_SERVICE_SWAP_RSP_MSG_SZ, > >> + true); > >> + if (ret) > >> + goto exit; > >> + > >> + status = RES_STATUS(priv->rx_msg->data[0]); > >> + if (status != priv->success_tag) { > >> + dev_err(dev, "Command Id[%d], Response Failure = 0x%x", > >> + ELE_SERVICE_SWAP_REQ, status); > >> + ret = -1; > >> + } else { > >> + if (flag == ELE_IMEM_EXPORT) > >> + ret = priv->rx_msg->data[1]; > >> + else > >> + ret = 0; > >> + } > >> +exit: > >> + > >> + return ret; > >> +} > >> + > >> +int ele_fw_authenticate(struct device *dev, phys_addr_t addr) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev); > >> + struct se_api_msg *tx_msg __free(kfree); > >> + struct se_api_msg *rx_msg __free(kfree); > >> + u32 status; > >> + int ret; > >> + > >> + tx_msg = kzalloc(ELE_FW_AUTH_REQ_SZ << 2, GFP_KERNEL); > >> + if (!tx_msg) { > >> + ret = -ENOMEM; > >> + return ret; > >> + } > >> + > >> + rx_msg = kzalloc(ELE_FW_AUTH_RSP_MSG_SZ << 2, GFP_KERNEL); > >> + if (!rx_msg) { > >> + ret = -ENOMEM; > >> + return ret; > >> + } > >> + ret = plat_fill_cmd_msg_hdr(priv, > >> + (struct se_msg_hdr *)&tx_msg->header, > >> + ELE_FW_AUTH_REQ, > >> + ELE_FW_AUTH_REQ_SZ, > >> + true); > >> + if (ret) > >> + goto exit; > >> + > >> + tx_msg->data[0] = addr; > >> + tx_msg->data[1] = 0x0; > >> + tx_msg->data[2] = addr; > >> + > >> + priv->rx_msg = rx_msg; > >> + ret = imx_ele_msg_send_rcv(priv, tx_msg); > >> + if (ret < 0) > >> + goto exit; > >> + > >> + ret = validate_rsp_hdr(priv, > >> + priv->rx_msg->header, > >> + ELE_FW_AUTH_REQ, > >> + ELE_FW_AUTH_RSP_MSG_SZ, > >> + true); > >> + if (ret) > >> + goto exit; > >> + > >> + status = RES_STATUS(priv->rx_msg->data[0]); > >> + if (status != priv->success_tag) { > >> + dev_err(dev, "Command Id[%d], Response Failure = 0x%x", > >> + ELE_FW_AUTH_REQ, status); > >> + ret = -1; > >> + } > >> +exit: > >> + > >> + return ret; > >> +} > >> diff --git a/drivers/firmware/imx/ele_base_msg.h > b/drivers/firmware/imx/ele_base_msg.h > >> new file mode 100644 > >> index 000000000000..3b3d2bf04a84 > >> --- /dev/null > >> +++ b/drivers/firmware/imx/ele_base_msg.h > >> @@ -0,0 +1,70 @@ > >> +/* SPDX-License-Identifier: GPL-2.0+ */ > >> +/* > >> + * Copyright 2024 NXP > >> + * > >> + * Header file for the EdgeLock Enclave Base API(s). > >> + */ > >> + > >> +#ifndef ELE_BASE_MSG_H > >> +#define ELE_BASE_MSG_H > >> + > >> +#include <linux/device.h> > >> +#include <linux/types.h> > >> + > >> +#define WORD_SZ 4 > >> +#define ELE_NONE_VAL 0x0 > >> + > >> +#define ELE_SUCCESS_IND 0xD6 > >> + > >> +#define ELE_GET_INFO_REQ 0xDA > >> +#define ELE_GET_INFO_REQ_MSG_SZ 0x10 > >> +#define ELE_GET_INFO_RSP_MSG_SZ 0x08 > >> + > >> +#define ELE_GET_INFO_BUFF_SZ 0x100 > >> +#define ELE_GET_INFO_READ_SZ 0xA0 > >> + > >> +#define DEFAULT_IMX_SOC_VER 0xA0 > >> +#define SOC_VER_MASK 0xFFFF0000 > >> +#define SOC_ID_MASK 0x0000FFFF > >> +struct soc_info { > >> + u32 imem_state; > >> + u8 major_ver; > >> + u8 minor_ver; > >> + u16 soc_id; > >> + u16 soc_rev; > >> + u64 serial_num; > >> +}; > >> + > >> +#define GET_INFO_SOC_INFO_WORD_OFFSET 1 > >> +#define GET_INFO_UUID_WORD_OFFSET 3 > >> +#define GET_INFO_SL_NUM_MSB_WORD_OFF \ > >> + (GET_INFO_UUID_WORD_OFFSET + 3) > >> +#define GET_INFO_SL_NUM_LSB_WORD_OFF \ > >> + (GET_INFO_UUID_WORD_OFFSET + 0) > >> + > >> +#define ELE_PING_REQ 0x01 > >> +#define ELE_PING_REQ_SZ 0x04 > >> +#define ELE_PING_RSP_SZ 0x08 > >> + > >> +#define ELE_SERVICE_SWAP_REQ 0xDF > >> +#define ELE_SERVICE_SWAP_REQ_MSG_SZ 0x18 > >> +#define ELE_SERVICE_SWAP_RSP_MSG_SZ 0x0C > >> +#define ELE_IMEM_SIZE 0x10000 > >> +#define ELE_IMEM_STATE_OK 0xCA > >> +#define ELE_IMEM_STATE_BAD 0xFE > >> +#define ELE_IMEM_STATE_WORD 0x27 > >> +#define ELE_IMEM_STATE_MASK 0x00ff0000 > >> +#define ELE_IMEM_EXPORT 0x1 > >> +#define ELE_IMEM_IMPORT 0x2 > >> + > >> +#define ELE_FW_AUTH_REQ 0x02 > >> +#define ELE_FW_AUTH_REQ_SZ 0x10 > >> +#define ELE_FW_AUTH_RSP_MSG_SZ 0x08 > >> + > >> +int ele_get_info(struct device *dev, struct soc_info *s_info); > >> +int ele_ping(struct device *dev); > >> +int ele_service_swap(struct device *dev, > >> + phys_addr_t addr, > >> + u32 addr_size, u16 flag); > >> +int ele_fw_authenticate(struct device *dev, phys_addr_t addr); > >> +#endif > >> diff --git a/drivers/firmware/imx/ele_common.c > b/drivers/firmware/imx/ele_common.c > >> new file mode 100644 > >> index 000000000000..dcf7f9034653 > >> --- /dev/null > >> +++ b/drivers/firmware/imx/ele_common.c > >> @@ -0,0 +1,341 @@ > >> +// SPDX-License-Identifier: GPL-2.0+ > >> +/* > >> + * Copyright 2024 NXP > >> + */ > >> + > >> +#include "ele_base_msg.h" > >> +#include "ele_common.h" > >> + > >> +u32 plat_add_msg_crc(u32 *msg, u32 msg_len) > >> +{ > >> + u32 nb_words = msg_len / (u32)sizeof(u32); > >> + u32 crc = 0; > >> + u32 i; > >> + > >> + for (i = 0; i < nb_words - 1; i++) > >> + crc ^= *(msg + i); > >> + > >> + return crc; > >> +} > >> + > >> +int imx_ele_msg_rcv(struct se_if_priv *priv) > >> +{ > >> + u32 wait; > >> + int err; > >> + > >> + wait = msecs_to_jiffies(1000); > >> + if (!wait_for_completion_timeout(&priv->done, wait)) { > >> + dev_err(priv->dev, > >> + "Error: wait_for_completion timed out.\n"); > >> + err = -ETIMEDOUT; > >> + } > >> + > >> + mutex_unlock(&priv->se_if_cmd_lock); > >> + priv->no_dev_ctx_used = false; > >> + > >> + return err; > >> +} > >> + > >> +int imx_ele_msg_send(struct se_if_priv *priv, void *mssg) > >> +{ > >> + bool is_cmd_lock_tobe_taken = false; > >> + int err; > >> + > >> + if (!priv->waiting_rsp_dev || priv->no_dev_ctx_used) { > >> + is_cmd_lock_tobe_taken = true; > >> + mutex_lock(&priv->se_if_cmd_lock); > >> + } > >> + scoped_guard(mutex, &priv->se_if_lock); > >> + > >> + err = mbox_send_message(priv->tx_chan, mssg); > >> + if (err < 0) { > >> + dev_err(priv->dev, "Error: mbox_send_message failure.\n"); > >> + if (is_cmd_lock_tobe_taken) > >> + mutex_unlock(&priv->se_if_cmd_lock); > >> + return err; > >> + } > >> + err = 0; > >> + > >> + return err; > >> +} > >> + > >> +int imx_ele_msg_send_rcv(struct se_if_priv *priv, void *mssg) > >> +{ > >> + int err; > >> + > >> + priv->no_dev_ctx_used = true; > >> + err = imx_ele_msg_send(priv, mssg); > >> + if (err) > >> + goto exit; > >> + > >> + err = imx_ele_msg_rcv(priv); > >> + > >> +exit: > >> + return err; > >> +} > >> + > >> +int imx_ele_miscdev_msg_rcv(struct se_if_device_ctx *dev_ctx) > >> +{ > >> + struct se_msg_hdr header = {0}; > >> + int err; > >> + > >> + err = wait_event_interruptible(dev_ctx->wq, dev_ctx->pending_hdr != > 0); > >> + if (err) > >> + dev_err(dev_ctx->dev, > >> + "%s: Err[0x%x]:Interrupted by signal.\n", > >> + dev_ctx->miscdev.name, err); > >> + > >> + header = *((struct se_msg_hdr *) (&dev_ctx->temp_resp[0])); > >> + > >> + if (header.tag == dev_ctx->priv->rsp_tag) > >> + mutex_unlock(&dev_ctx->priv->se_if_cmd_lock); > >> + > >> + return err; > >> +} > >> + > >> +int imx_ele_miscdev_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 = {0}; > >> + int err; > >> + > >> + header = *((struct se_msg_hdr *) tx_msg); > >> + > >> + /* > >> + * Check that the size passed as argument matches the size > >> + * carried in the message. > >> + */ > >> + err = header.size << 2; > >> + > >> + if (err != tx_msg_sz) { > >> + err = -EINVAL; > >> + dev_err(priv->dev, > >> + "%s: User buffer too small\n", > >> + dev_ctx->miscdev.name); > >> + goto exit; > >> + } > >> + /* Check the message is valid according to tags */ > >> + if (header.tag == priv->cmd_tag) > >> + priv->waiting_rsp_dev = dev_ctx; > >> + else if (header.tag == priv->rsp_tag) { > >> + /* Check the device context can send the command */ > >> + if (dev_ctx != priv->cmd_receiver_dev) { > >> + dev_err(priv->dev, > >> + "%s: Channel not configured to send resp to FW.", > >> + dev_ctx->miscdev.name); > >> + err = -EPERM; > >> + goto exit; > >> + } > >> + } else { > >> + dev_err(priv->dev, > >> + "%s: The message does not have a valid TAG\n", > >> + dev_ctx->miscdev.name); > >> + err = -EINVAL; > >> + goto exit; > >> + } > >> + err = imx_ele_msg_send(priv, tx_msg); > >> +exit: > >> + return err; > >> +} > >> + > >> +/* > >> + * Callback called by mailbox FW, when data is received. > >> + */ > >> +void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg) > >> +{ > >> + struct device *dev = mbox_cl->dev; > >> + struct se_if_device_ctx *dev_ctx; > >> + struct se_api_msg *rx_msg; > >> + bool is_response = false; > >> + struct se_if_priv *priv; > >> + struct se_msg_hdr header; > >> + > >> + priv = dev_get_drvdata(dev); > >> + if (!priv) { > >> + dev_err(dev, "SE-MU Priv data is NULL;"); > >> + return; > >> + } > >> + > >> + /* The function can be called with NULL msg */ > >> + if (!msg) { > >> + dev_err(dev, "Message is invalid\n"); > >> + return; > >> + } > >> + > >> + header.tag = ((u8 *)msg)[TAG_OFFSET]; > >> + header.command = ((u8 *)msg)[CMD_OFFSET]; > >> + header.size = ((u8 *)msg)[SZ_OFFSET]; > >> + header.ver = ((u8 *)msg)[VER_OFFSET]; > >> + > >> + /* Incoming command: wake up the receiver if any. */ > >> + if (header.tag == priv->cmd_tag) { > >> + dev_dbg(dev, "Selecting cmd receiver\n"); > >> + dev_ctx = priv->cmd_receiver_dev; > >> + } else if (header.tag == priv->rsp_tag) { > >> + if (priv->waiting_rsp_dev) { > >> + dev_dbg(dev, "Selecting rsp waiter\n"); > >> + dev_ctx = priv->waiting_rsp_dev; > >> + is_response = true; > >> + } else { > >> + /* > >> + * Reading the EdgeLock Enclave response > >> + * to the command, sent by other > >> + * linux kernel services. > >> + */ > >> + spin_lock(&priv->lock); > >> + memcpy(&priv->rx_msg, msg, header.size << 2); > >> + > >> + complete(&priv->done); > >> + spin_unlock(&priv->lock); > >> + return; > >> + } > >> + } else { > >> + dev_err(dev, "Failed to select a device for message: %.8x\n", > >> + *((u32 *) &header)); > >> + return; > >> + } > >> + /* Init reception */ > >> + rx_msg = kzalloc(header.size << 2, GFP_KERNEL); > >> + if (rx_msg) > >> + memcpy(rx_msg, msg, header.size << 2); > >> + > >> + dev_ctx->temp_resp = (u32 *)rx_msg; > >> + dev_ctx->temp_resp_size = header.size; > >> + > >> + /* Allow user to read */ > >> + dev_ctx->pending_hdr = 1; > >> + wake_up_interruptible(&dev_ctx->wq); > >> + > >> + if (is_response) > >> + priv->waiting_rsp_dev = NULL; > >> +} > >> + > >> +int validate_rsp_hdr(struct se_if_priv *priv, u32 header, > >> + uint8_t msg_id, uint8_t sz, bool is_base_api) > >> +{ > >> + int ret = -EINVAL; > >> + u32 size; > >> + u32 cmd; > >> + u32 tag; > >> + u32 ver; > >> + > >> + tag = MSG_TAG(header); > >> + cmd = MSG_COMMAND(header); > >> + size = MSG_SIZE(header); > >> + ver = MSG_VER(header); > >> + > >> + do { > >> + if (tag != priv->rsp_tag) { > >> + dev_err(priv->dev, > >> + "MSG[0x%x] Hdr: Resp tag mismatch. (0x%x != 0x%x)", > >> + msg_id, tag, priv->rsp_tag); > >> + break; > >> + } > >> + > >> + if (cmd != msg_id) { > >> + dev_err(priv->dev, > >> + "MSG Header: Cmd id mismatch. (0x%x != 0x%x)", > >> + cmd, msg_id); > >> + break; > >> + } > >> + > >> + if (size != (sz >> 2)) { > >> + dev_err(priv->dev, > >> + "MSG[0x%x] Hdr: Cmd size mismatch. (0x%x != 0x%x)", > >> + msg_id, size, (sz >> 2)); > >> + break; > >> + } > >> + > >> + if (is_base_api && (ver != priv->base_api_ver)) { > >> + dev_err(priv->dev, > >> + "MSG[0x%x] Hdr: Base API Vers mismatch. (0x%x != > 0x%x)", > >> + msg_id, ver, priv->base_api_ver); > >> + break; > >> + } else if (!is_base_api && ver != priv->fw_api_ver) { > >> + dev_err(priv->dev, > >> + "MSG[0x%x] Hdr: FW API Vers mismatch. (0x%x != 0x%x)", > >> + msg_id, ver, priv->fw_api_ver); > >> + break; > >> + } > >> + > >> + ret = 0; > >> + > >> + } while (false); > >> + > >> + return ret; > >> +} > >> + > >> +int se_save_imem_state(struct device *dev) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev); > >> + int ret; > >> + > >> + /* EXPORT command will save encrypted IMEM to given address, > >> + * so later in resume, IMEM can be restored from the given > >> + * address. > >> + * > >> + * Size must be at least 64 kB. > >> + */ > >> + ret = ele_service_swap(dev, > >> + priv->imem.phyaddr, > >> + ELE_IMEM_SIZE, > >> + ELE_IMEM_EXPORT); > >> + if (ret < 0) > >> + dev_err(dev, "Failed to export IMEM\n"); > >> + else > >> + dev_info(dev, > >> + "Exported %d bytes of encrypted IMEM\n", > >> + ret); > >> + > >> + return ret; > >> +} > >> + > >> +int se_restore_imem_state(struct device *dev) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev); > >> + struct soc_info s_info; > >> + int ret; > >> + > >> + /* get info from ELE */ > >> + ret = ele_get_info(dev, &s_info); > >> + if (ret) { > >> + dev_err(dev, "Failed to get info from ELE.\n"); > >> + return ret; > >> + } > >> + > >> + /* Get IMEM state, if 0xFE then import IMEM */ > >> + if (s_info.imem_state == ELE_IMEM_STATE_BAD) { > >> + /* IMPORT command will restore IMEM from the given > >> + * address, here size is the actual size returned by ELE > >> + * during the export operation > >> + */ > >> + ret = ele_service_swap(dev, > >> + priv->imem.phyaddr, > >> + priv->imem.size, > >> + ELE_IMEM_IMPORT); > >> + if (ret) { > >> + dev_err(dev, "Failed to import IMEM\n"); > >> + goto exit; > >> + } > >> + } else > >> + goto exit; > >> + > >> + /* After importing IMEM, check if IMEM state is equal to 0xCA > >> + * to ensure IMEM is fully loaded and > >> + * ELE functionality can be used. > >> + */ > >> + ret = ele_get_info(dev, &s_info); > >> + if (ret) { > >> + dev_err(dev, "Failed to get info from ELE.\n"); > >> + goto exit; > >> + } > >> + > >> + if (s_info.imem_state == ELE_IMEM_STATE_OK) > >> + dev_info(dev, "Successfully restored IMEM\n"); > >> + else > >> + dev_err(dev, "Failed to restore IMEM\n"); > >> + > >> +exit: > >> + return ret; > >> +} > >> diff --git a/drivers/firmware/imx/ele_common.h > b/drivers/firmware/imx/ele_common.h > >> new file mode 100644 > >> index 000000000000..6e3a2114bb56 > >> --- /dev/null > >> +++ b/drivers/firmware/imx/ele_common.h > >> @@ -0,0 +1,43 @@ > >> +/* SPDX-License-Identifier: GPL-2.0+ */ > >> +/* > >> + * Copyright 2024 NXP > >> + */ > >> + > >> + > >> +#ifndef __ELE_COMMON_H__ > >> +#define __ELE_COMMON_H__ > >> + > >> +#include "se_ctrl.h" > >> + > >> +#define IMX_ELE_FW_DIR "imx/ele/" > >> + > >> +uint32_t plat_add_msg_crc(uint32_t *msg, uint32_t msg_len); > >> +int imx_ele_miscdev_msg_rcv(struct se_if_device_ctx *priv); > >> +int imx_ele_miscdev_msg_send(struct se_if_device_ctx *dev_ctx, > >> + void *tx_msg, int tx_msg_sz); > >> +int imx_ele_msg_rcv(struct se_if_priv *priv); > >> +int imx_ele_msg_send(struct se_if_priv *priv, void *mssg); > >> +int imx_ele_msg_send_rcv(struct se_if_priv *priv, void *mssg); > >> +void se_if_rx_callback(struct mbox_client *mbox_cl, void *msg); > >> +int validate_rsp_hdr(struct se_if_priv *priv, unsigned int header, > >> + u8 msg_id, u8 sz, bool is_base_api); > >> + > >> +/* Fill a command message header with a given command ID and length > in bytes. */ > >> +static inline int plat_fill_cmd_msg_hdr(struct se_if_priv *priv, > >> + struct se_msg_hdr *hdr, > >> + u8 cmd, > >> + u32 len, > >> + bool is_base_api) > >> +{ > >> + hdr->tag = priv->cmd_tag; > >> + hdr->ver = (is_base_api) ? priv->base_api_ver : priv->fw_api_ver; > >> + hdr->command = cmd; > >> + hdr->size = len >> 2; > >> + > >> + return 0; > >> +} > >> + > >> +int se_save_imem_state(struct device *dev); > >> +int se_restore_imem_state(struct device *dev); > >> + > >> +#endif /*__ELE_COMMON_H__ */ > >> diff --git a/drivers/firmware/imx/se_ctrl.c > b/drivers/firmware/imx/se_ctrl.c > >> new file mode 100644 > >> index 000000000000..11c5eaa7353f > >> --- /dev/null > >> +++ b/drivers/firmware/imx/se_ctrl.c > >> @@ -0,0 +1,1339 @@ > >> +// SPDX-License-Identifier: GPL-2.0+ > >> +/* > >> + * Copyright 2024 NXP > >> + */ > >> + > >> +#include <linux/completion.h> > >> +#include <linux/delay.h> > >> +#include <linux/dev_printk.h> > >> +#include <linux/dma-mapping.h> > >> +#include <linux/errno.h> > >> +#include <linux/export.h> > >> +#include <linux/firmware.h> > >> +#include <linux/firmware/imx/se_api.h> > >> +#include <linux/genalloc.h> > >> +#include <linux/init.h> > >> +#include <linux/io.h> > >> +#include <linux/miscdevice.h> > >> +#include <linux/mod_devicetable.h> > >> +#include <linux/module.h> > >> +#include <linux/of_platform.h> > >> +#include <linux/of_reserved_mem.h> > >> +#include <linux/platform_device.h> > >> +#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" > >> +#include "se_ctrl.h" > >> + > >> +#define RESERVED_DMA_POOL BIT(1) > >> + > >> +struct imx_se_node_info { > >> + u8 se_if_id; > >> + u8 se_if_did; > >> + u8 max_dev_ctx; > >> + u8 cmd_tag; > >> + u8 rsp_tag; > >> + u8 success_tag; > >> + u8 base_api_ver; > >> + u8 fw_api_ver; > >> + u8 *se_name; > >> + u8 *mbox_tx_name; > >> + u8 *mbox_rx_name; > >> + u8 *pool_name; > >> + u8 *fw_name_in_rfs; > >> + bool soc_register; > >> + bool reserved_dma_ranges; > >> + bool imem_mgmt; > >> +}; > >> + > >> +struct imx_se_node_info_list { > >> + u8 num_mu; > >> + u16 soc_id; > >> + u16 soc_rev; > >> + struct imx_se_node_info info[]; > >> +}; > >> + > >> +static const struct imx_se_node_info_list imx8ulp_info = { > >> + .num_mu = 1, > >> + .soc_id = SOC_ID_OF_IMX8ULP, > >> + .info = { > >> + { > >> + .se_if_id = 2, > >> + .se_if_did = 7, > >> + .max_dev_ctx = 4, > >> + .cmd_tag = 0x17, > >> + .rsp_tag = 0xe1, > >> + .success_tag = 0xd6, > >> + .base_api_ver = MESSAGING_VERSION_6, > >> + .fw_api_ver = MESSAGING_VERSION_7, > >> + .se_name = "hsm1", > >> + .mbox_tx_name = "tx", > >> + .mbox_rx_name = "rx", > >> + .pool_name = "sram", > >> + .fw_name_in_rfs = IMX_ELE_FW_DIR\ > >> + "mx8ulpa2ext-ahab-container.img", > >> + .soc_register = true, > >> + .reserved_dma_ranges = true, > >> + .imem_mgmt = true, > >> + }, > >> + }, > >> +}; > >> + > >> +static const struct imx_se_node_info_list imx93_info = { > >> + .num_mu = 1, > >> + .soc_id = SOC_ID_OF_IMX93, > >> + .info = { > >> + { > >> + .se_if_id = 2, > >> + .se_if_did = 3, > >> + .max_dev_ctx = 4, > >> + .cmd_tag = 0x17, > >> + .rsp_tag = 0xe1, > >> + .success_tag = 0xd6, > >> + .base_api_ver = MESSAGING_VERSION_6, > >> + .fw_api_ver = MESSAGING_VERSION_7, > >> + .se_name = "hsm1", > >> + .mbox_tx_name = "tx", > >> + .mbox_rx_name = "rx", > >> + .reserved_dma_ranges = true, > >> + .imem_mgmt = true, > >> + .soc_register = true, > >> + }, > >> + }, > >> +}; > >> + > >> +static const struct of_device_id se_match[] = { > >> + { .compatible = "fsl,imx8ulp-ele", .data = (void *)&imx8ulp_info}, > >> + { .compatible = "fsl,imx93-ele", .data = (void *)&imx93_info}, > >> + {}, > >> +}; > >> + > >> +static struct imx_se_node_info > >> + *get_imx_se_node_info(struct imx_se_node_info_list *info_list, > >> + const u32 idx) > >> +{ > >> + if (idx < 0 || idx > info_list->num_mu) > >> + return NULL; > >> + > >> + return &info_list->info[idx]; > >> +} > >> + > >> +void *get_phy_buf_mem_pool(struct device *dev, > >> + u8 *mem_pool_name, > >> + dma_addr_t *buf, > >> + u32 size) > >> +{ > >> + struct device_node *of_node = dev->of_node; > >> + struct gen_pool *mem_pool; > >> + > >> + mem_pool = of_gen_pool_get(of_node, mem_pool_name, 0); > >> + if (!mem_pool) { > >> + dev_err(dev, > >> + "Unable to get sram pool = %s\n", > >> + mem_pool_name); > >> + return 0; > >> + } > >> + > >> + return gen_pool_dma_alloc(mem_pool, size, buf); > >> +} > >> + > >> +void free_phybuf_mem_pool(struct device *dev, > >> + u8 *mem_pool_name, > >> + u32 *buf, > >> + u32 size) > >> +{ > >> + struct device_node *of_node = dev->of_node; > >> + struct gen_pool *mem_pool; > >> + > >> + mem_pool = of_gen_pool_get(of_node, mem_pool_name, 0); > >> + if (!mem_pool) > >> + dev_err(dev, > >> + "%s: Failed: Unable to get sram pool.\n", > >> + __func__); > >> + > >> + gen_pool_free(mem_pool, (u64)buf, size); > >> +} > >> + > >> +static int imx_fetch_soc_info(struct device *dev) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev); > >> + struct imx_se_node_info_list *info_list; > >> + const struct imx_se_node_info *info; > >> + struct soc_device_attribute *attr; > >> + struct soc_device *sdev; > >> + struct soc_info s_info; > >> + int err = 0; > >> + > >> + info = priv->info; > >> + info_list = (struct imx_se_node_info_list *) > >> + device_get_match_data(dev->parent); > >> + if (info_list->soc_rev) > >> + return err; > >> + > >> + err = ele_get_info(dev, &s_info); > >> + if (err) > >> + s_info.major_ver = DEFAULT_IMX_SOC_VER; > >> + > >> + info_list->soc_rev = s_info.soc_rev; > >> + > >> + if (!info->soc_register) > >> + return 0; > >> + > >> + attr = devm_kzalloc(dev, sizeof(*attr), GFP_KERNEL); > >> + if (!attr) > >> + return -ENOMEM; > >> + > >> + if (s_info.minor_ver) > >> + attr->revision = devm_kasprintf(dev, GFP_KERNEL, "%x.%x", > >> + s_info.major_ver, > >> + s_info.minor_ver); > >> + else > >> + attr->revision = devm_kasprintf(dev, GFP_KERNEL, "%x", > >> + s_info.major_ver); > >> + > >> + switch (s_info.soc_id) { > >> + case SOC_ID_OF_IMX8ULP: > >> + attr->soc_id = devm_kasprintf(dev, GFP_KERNEL, > >> + "i.MX8ULP"); > >> + break; > >> + case SOC_ID_OF_IMX93: > >> + attr->soc_id = devm_kasprintf(dev, GFP_KERNEL, > >> + "i.MX93"); > >> + break; > >> + } > >> + > >> + err = of_property_read_string(of_root, "model", > >> + &attr->machine); > >> + if (err) { > >> + devm_kfree(dev, attr); > >> + return -EINVAL; > >> + } > >> + attr->family = devm_kasprintf(dev, GFP_KERNEL, "Freescale i.MX"); > >> + > >> + attr->serial_number > >> + = devm_kasprintf(dev, GFP_KERNEL, "%016llX", s_info.serial_num); > >> + > >> + sdev = soc_device_register(attr); > >> + if (IS_ERR(sdev)) { > >> + devm_kfree(dev, attr->soc_id); > >> + devm_kfree(dev, attr->serial_number); > >> + devm_kfree(dev, attr->revision); > >> + devm_kfree(dev, attr->family); > >> + devm_kfree(dev, attr->machine); > >> + devm_kfree(dev, attr); > >> + return PTR_ERR(sdev); > >> + } > >> + > >> + return 0; > >> +} > >> + > >> +/* > >> + * 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_api_msg *tx_msg __free(kfree); > >> + struct se_if_device_ctx *dev_ctx; > >> + struct se_if_priv *priv; > >> + int err; > >> + > >> + dev_ctx = container_of(fp->private_data, > >> + struct se_if_device_ctx, > >> + miscdev); > >> + priv = dev_ctx->priv; > >> + dev_dbg(priv->dev, > >> + "%s: write from buf (%p)%zu, ppos=%lld\n", > >> + dev_ctx->miscdev.name, > >> + buf, size, ((ppos) ? *ppos : 0)); > >> + > >> + if (down_interruptible(&dev_ctx->fops_lock)) > >> + return -EBUSY; > >> + > >> + if (dev_ctx->status != MU_OPENED) { > >> + err = -EINVAL; > >> + goto exit; > >> + } > >> + > >> + if (size < SE_MU_HDR_SZ) { > >> + dev_err(priv->dev, > >> + "%s: User buffer too small(%zu < %d)\n", > >> + dev_ctx->miscdev.name, > >> + size, SE_MU_HDR_SZ); > >> + err = -ENOSPC; > >> + goto exit; > >> + } > >> + > >> + tx_msg = memdup_user((void __user *)ppos, size); > >> + if (!tx_msg) { > >> + err = -ENOMEM; > >> + goto exit; > >> + } > >> + > >> + /* Copy data to buffer */ > >> + if (copy_from_user(tx_msg, buf, size)) { > >> + err = -EFAULT; > >> + dev_err(priv->dev, > >> + "%s: Fail copy message from user\n", > >> + dev_ctx->miscdev.name); > >> + goto exit; > >> + } > >> + > >> + print_hex_dump_debug("from user ", DUMP_PREFIX_OFFSET, 4, 4, > >> + tx_msg, size, false); > >> + > >> + err = imx_ele_miscdev_msg_send(dev_ctx, tx_msg, size); > >> + > >> +exit: > >> + up(&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; > >> + struct se_buf_desc *b_desc; > >> + struct se_if_priv *priv; > >> + u32 size_to_copy; > >> + int err; > >> + > >> + dev_ctx = container_of(fp->private_data, > >> + struct se_if_device_ctx, > >> + miscdev); > >> + priv = dev_ctx->priv; > >> + dev_dbg(priv->dev, > >> + "%s: read to buf %p(%zu), ppos=%lld\n", > >> + dev_ctx->miscdev.name, > >> + buf, size, ((ppos) ? *ppos : 0)); > >> + > >> + if (down_interruptible(&dev_ctx->fops_lock)) > >> + return -EBUSY; > >> + > >> + if (dev_ctx->status != MU_OPENED) { > >> + err = -EINVAL; > >> + goto exit; > >> + } > >> + > >> + err = imx_ele_miscdev_msg_rcv(dev_ctx); > >> + if (err) > >> + goto exit; > >> + > >> + /* Buffer containing the message from FW, is > >> + * allocated in callback function. > >> + * Check if buffer allocation failed. > >> + */ > >> + if (!dev_ctx->temp_resp) { > >> + err = -ENOMEM; > >> + goto exit; > >> + } > >> + > >> + dev_dbg(priv->dev, > >> + "%s: %s %s\n", > >> + dev_ctx->miscdev.name, > >> + __func__, > >> + "message received, start transmit to user"); > >> + > >> + /* > >> + * Check that the size passed as argument is larger than > >> + * the one carried in the message. > >> + */ > >> + size_to_copy = dev_ctx->temp_resp_size << 2; > >> + if (size_to_copy > size) { > >> + dev_dbg(priv->dev, > >> + "%s: User buffer too small (%zu < %d)\n", > >> + dev_ctx->miscdev.name, > >> + size, size_to_copy); > >> + size_to_copy = size; > >> + } > >> + > >> + /* > >> + * We may need to copy the output data to user before > >> + * delivering the completion message. > >> + */ > >> + while (!list_empty(&dev_ctx->pending_out)) { > >> + b_desc = list_first_entry_or_null(&dev_ctx->pending_out, > >> + struct se_buf_desc, > >> + link); > >> + if (!b_desc) > >> + continue; > >> + > >> + if (b_desc->usr_buf_ptr && b_desc->shared_buf_ptr) { > >> + > >> + dev_dbg(priv->dev, > >> + "%s: Copy output data to user\n", > >> + dev_ctx->miscdev.name); > >> + if (copy_to_user(b_desc->usr_buf_ptr, > >> + b_desc->shared_buf_ptr, > >> + b_desc->size)) { > >> + dev_err(priv->dev, > >> + "%s: Failure copying output data to user.", > >> + dev_ctx->miscdev.name); > >> + err = -EFAULT; > >> + goto exit; > >> + } > >> + } > >> + > >> + if (b_desc->shared_buf_ptr) > >> + memset(b_desc->shared_buf_ptr, 0, b_desc->size); > >> + > >> + __list_del_entry(&b_desc->link); > >> + kfree(b_desc); > >> + } > >> + > >> + /* Copy data from the buffer */ > >> + print_hex_dump_debug("to user ", DUMP_PREFIX_OFFSET, 4, 4, > >> + dev_ctx->temp_resp, size_to_copy, false); > >> + if (copy_to_user(buf, dev_ctx->temp_resp, size_to_copy)) { > >> + dev_err(priv->dev, > >> + "%s: Failed to copy to user\n", > >> + dev_ctx->miscdev.name); > >> + err = -EFAULT; > >> + goto exit; > >> + } > >> + > >> + err = size_to_copy; > >> + kfree(dev_ctx->temp_resp); > >> + > >> + /* free memory allocated on the shared buffers. */ > >> + dev_ctx->secure_mem.pos = 0; > >> + dev_ctx->non_secure_mem.pos = 0; > >> + > >> + dev_ctx->pending_hdr = 0; > >> + > >> +exit: > >> + /* > >> + * Clean the used Shared Memory space, > >> + * whether its Input Data copied from user buffers, or > >> + * Data received from FW. > >> + */ > >> + while (!list_empty(&dev_ctx->pending_in) || > >> + !list_empty(&dev_ctx->pending_out)) { > >> + if (!list_empty(&dev_ctx->pending_in)) > >> + b_desc = list_first_entry_or_null(&dev_ctx->pending_in, > >> + struct se_buf_desc, > >> + link); > >> + else > >> + b_desc = list_first_entry_or_null(&dev_ctx->pending_out, > >> + struct se_buf_desc, > >> + link); > >> + > >> + if (!b_desc) > >> + continue; > >> + > >> + if (b_desc->shared_buf_ptr) > >> + memset(b_desc->shared_buf_ptr, 0, b_desc->size); > >> + > >> + __list_del_entry(&b_desc->link); > >> + kfree(b_desc); > >> + } > >> + > >> + up(&dev_ctx->fops_lock); > >> + return err; > >> +} > >> + > >> +/* Give access to EdgeLock Enclave, to the memory we want to share */ > >> +static int se_if_setup_se_mem_access(struct se_if_device_ctx *dev_ctx, > >> + u64 addr, u32 len) > >> +{ > >> + /* Assuming EdgeLock Enclave has access to all the memory regions */ > >> + int ret = 0; > >> + > >> + if (ret) { > >> + dev_err(dev_ctx->priv->dev, > >> + "%s: Fail find memreg\n", dev_ctx->miscdev.name); > >> + goto exit; > >> + } > >> + > >> + if (ret) { > >> + dev_err(dev_ctx->priv->dev, > >> + "%s: Fail set permission for resource\n", > >> + dev_ctx->miscdev.name); > >> + goto exit; > >> + } > >> + > >> +exit: > >> + return ret; > >> +} > >> + > >> +static int se_ioctl_get_mu_info(struct se_if_device_ctx *dev_ctx, > >> + u64 arg) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev_ctx->dev); > >> + struct imx_se_node_info *if_node_info; > >> + struct se_ioctl_get_if_info info; > >> + int err = 0; > >> + > >> + if_node_info = (struct imx_se_node_info *)priv->info; > >> + > >> + info.se_if_id = if_node_info->se_if_id; > >> + info.interrupt_idx = 0; > >> + info.tz = 0; > >> + info.did = if_node_info->se_if_did; > >> + info.cmd_tag = if_node_info->cmd_tag; > >> + info.rsp_tag = if_node_info->rsp_tag; > >> + info.success_tag = if_node_info->success_tag; > >> + info.base_api_ver = if_node_info->base_api_ver; > >> + info.fw_api_ver = if_node_info->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->miscdev.name, > >> + info.se_if_id, info.interrupt_idx, info.tz, info.did); > >> + > >> + if (copy_to_user((u8 *)arg, &info, sizeof(info))) { > >> + dev_err(dev_ctx->priv->dev, > >> + "%s: Failed to copy mu info to user\n", > >> + dev_ctx->miscdev.name); > >> + err = -EFAULT; > >> + goto exit; > >> + } > >> + > >> +exit: > >> + 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_ioctl_setup_iobuf io = {0}; > >> + struct se_shared_mem *shared_mem; > >> + struct se_buf_desc *b_desc; > >> + int err = 0; > >> + u32 pos; > >> + > >> + if (copy_from_user(&io, (u8 *)arg, sizeof(io))) { > >> + dev_err(dev_ctx->priv->dev, > >> + "%s: Failed copy iobuf config from user\n", > >> + dev_ctx->miscdev.name); > >> + err = -EFAULT; > >> + goto exit; > >> + } > >> + > >> + dev_dbg(dev_ctx->priv->dev, > >> + "%s: io [buf: %p(%d) flag: %x]\n", > >> + dev_ctx->miscdev.name, > >> + 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; > >> + } > >> + > >> + /* Select the shared memory to be used for this buffer. */ > >> + if (io.flags & SE_MU_IO_FLAGS_USE_SEC_MEM) { > >> + /* App requires to use secure memory for this buffer.*/ > >> + dev_err(dev_ctx->priv->dev, > >> + "%s: Failed allocate SEC MEM memory\n", > >> + dev_ctx->miscdev.name); > >> + err = -EFAULT; > >> + goto exit; > >> + } else { > >> + /* No specific requirement for this buffer. */ > >> + shared_mem = &dev_ctx->non_secure_mem; > >> + } > >> + > >> + /* Check there is enough space in the shared memory. */ > >> + if (shared_mem->size < shared_mem->pos > >> + || io.length >= shared_mem->size - shared_mem->pos) { > >> + dev_err(dev_ctx->priv->dev, > >> + "%s: Not enough space in shared memory\n", > >> + dev_ctx->miscdev.name); > >> + err = -ENOMEM; > >> + goto exit; > >> + } > >> + > >> + /* 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; > >> + > >> + if ((io.flags & SE_MU_IO_FLAGS_USE_SEC_MEM) && > >> + !(io.flags & SE_MU_IO_FLAGS_USE_SHORT_ADDR)) { > >> + /*Add base address to get full address.*/ > >> + dev_err(dev_ctx->priv->dev, > >> + "%s: Failed allocate SEC MEM memory\n", > >> + dev_ctx->miscdev.name); > >> + err = -EFAULT; > >> + goto exit; > >> + } > >> + > >> + 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->miscdev.name); > >> + err = -EFAULT; > >> + goto exit; > >> + } > >> + } > >> + > >> + b_desc = kzalloc(sizeof(*b_desc), GFP_KERNEL); > >> + if (!b_desc) { > >> + err = -ENOMEM; > >> + goto exit; > >> + } > >> + > >> +copy: > >> + /* Provide the EdgeLock Enclave address to user space only if > success.*/ > >> + if (copy_to_user((u8 *)arg, &io, sizeof(io))) { > >> + dev_err(dev_ctx->priv->dev, > >> + "%s: Failed to copy iobuff setup to user\n", > >> + dev_ctx->miscdev.name); > >> + kfree(b_desc); > >> + err = -EFAULT; > >> + goto exit; > >> + } > >> + > >> + if (b_desc) { > >> + b_desc->shared_buf_ptr = shared_mem->ptr + 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, &dev_ctx->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, &dev_ctx->pending_out); > >> + } > >> + } > >> + > >> +exit: > >> + return err; > >> +} > >> + > >> +/* IOCTL to provide SoC information */ > >> +static int se_ioctl_get_soc_info_handler(struct se_if_device_ctx > *dev_ctx, > >> + u64 arg) > >> +{ > >> + struct imx_se_node_info_list *info_list; > >> + struct se_ioctl_get_soc_info soc_info; > >> + int err = -EINVAL; > >> + > >> + info_list = (struct imx_se_node_info_list *) > >> + device_get_match_data(dev_ctx->priv->dev->parent); > >> + if (!info_list) > >> + goto exit; > >> + > >> + soc_info.soc_id = info_list->soc_id; > >> + soc_info.soc_rev = info_list->soc_rev; > >> + > >> + err = (int)copy_to_user((u8 *)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->miscdev.name); > >> + err = -EFAULT; > >> + goto exit; > >> + } > >> + > >> +exit: > >> + return err; > >> +} > >> + > >> +/* Open a character device. */ > >> +static int se_if_fops_open(struct inode *nd, struct file *fp) > >> +{ > >> + struct se_if_device_ctx *dev_ctx = container_of(fp->private_data, > >> + struct se_if_device_ctx, > >> + miscdev); > >> + int err; > >> + > >> + /* Avoid race if opened at the same time */ > >> + if (down_trylock(&dev_ctx->fops_lock)) > >> + return -EBUSY; > >> + > >> + /* Authorize only 1 instance. */ > >> + if (dev_ctx->status != MU_FREE) { > >> + err = -EBUSY; > >> + goto exit; > >> + } > >> + > >> + /* > >> + * Allocate some memory for data exchanges with S40x. > >> + * This will be used for data not requiring secure memory. > >> + */ > >> + dev_ctx->non_secure_mem.ptr = dmam_alloc_coherent(dev_ctx->dev, > >> + MAX_DATA_SIZE_PER_USER, > >> + &dev_ctx->non_secure_mem.dma_addr, > >> + GFP_KERNEL); > >> + if (!dev_ctx->non_secure_mem.ptr) { > >> + err = -ENOMEM; > >> + goto exit; > >> + } > >> + > >> + err = se_if_setup_se_mem_access(dev_ctx, > >> + dev_ctx->non_secure_mem.dma_addr, > >> + MAX_DATA_SIZE_PER_USER); > >> + if (err) { > >> + err = -EPERM; > >> + dev_err(dev_ctx->priv->dev, > >> + "%s: Failed to share access to shared memory\n", > >> + dev_ctx->miscdev.name); > >> + goto free_coherent; > >> + } > >> + > >> + dev_ctx->non_secure_mem.size = MAX_DATA_SIZE_PER_USER; > >> + dev_ctx->non_secure_mem.pos = 0; > >> + dev_ctx->status = MU_OPENED; > >> + > >> + dev_ctx->pending_hdr = 0; > >> + > >> + goto exit; > >> + > >> +free_coherent: > >> + dmam_free_coherent(dev_ctx->priv->dev, > MAX_DATA_SIZE_PER_USER, > >> + dev_ctx->non_secure_mem.ptr, > >> + dev_ctx->non_secure_mem.dma_addr); > >> + > >> +exit: > >> + up(&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 = container_of(fp->private_data, > >> + struct se_if_device_ctx, > >> + miscdev); > >> + struct se_if_priv *priv = dev_ctx->priv; > >> + struct se_buf_desc *b_desc; > >> + > >> + /* Avoid race if closed at the same time */ > >> + if (down_trylock(&dev_ctx->fops_lock)) > >> + return -EBUSY; > >> + > >> + /* The device context has not been opened */ > >> + if (dev_ctx->status != MU_OPENED) > >> + goto exit; > >> + > >> + /* check if this device was registered as command receiver. */ > >> + if (priv->cmd_receiver_dev == dev_ctx) > >> + priv->cmd_receiver_dev = NULL; > >> + > >> + /* check if this device was registered as waiting response. */ > >> + if (priv->waiting_rsp_dev == dev_ctx) { > >> + priv->waiting_rsp_dev = NULL; > >> + mutex_unlock(&priv->se_if_cmd_lock); > >> + } > >> + > >> + /* Unmap secure memory shared buffer. */ > >> + if (dev_ctx->secure_mem.ptr) > >> + devm_iounmap(dev_ctx->dev, dev_ctx->secure_mem.ptr); > >> + > >> + dev_ctx->secure_mem.ptr = NULL; > >> + dev_ctx->secure_mem.dma_addr = 0; > >> + dev_ctx->secure_mem.size = 0; > >> + dev_ctx->secure_mem.pos = 0; > >> + > >> + /* Free non-secure shared buffer. */ > >> + dmam_free_coherent(dev_ctx->priv->dev, > MAX_DATA_SIZE_PER_USER, > >> + dev_ctx->non_secure_mem.ptr, > >> + dev_ctx->non_secure_mem.dma_addr); > >> + > >> + dev_ctx->non_secure_mem.ptr = NULL; > >> + dev_ctx->non_secure_mem.dma_addr = 0; > >> + dev_ctx->non_secure_mem.size = 0; > >> + dev_ctx->non_secure_mem.pos = 0; > >> + > >> + while (!list_empty(&dev_ctx->pending_in) || > >> + !list_empty(&dev_ctx->pending_out)) { > >> + if (!list_empty(&dev_ctx->pending_in)) > >> + b_desc = list_first_entry_or_null(&dev_ctx->pending_in, > >> + struct se_buf_desc, > >> + link); > >> + else > >> + b_desc = list_first_entry_or_null(&dev_ctx->pending_out, > >> + struct se_buf_desc, > >> + link); > >> + > >> + if (!b_desc) > >> + continue; > >> + > >> + if (b_desc->shared_buf_ptr) > >> + memset(b_desc->shared_buf_ptr, 0, b_desc->size); > >> + > >> + __list_del_entry(&b_desc->link); > >> + devm_kfree(dev_ctx->dev, b_desc); > >> + } > >> + > >> + dev_ctx->status = MU_FREE; > >> + > >> +exit: > >> + up(&dev_ctx->fops_lock); > >> + return 0; > >> +} > >> + > >> +/* IOCTL entry point of a character device */ > >> +static long se_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) > >> +//static long se_ioctl(struct file *fp, u32 cmd, u64 arg) > >> +{ > >> + struct se_if_device_ctx *dev_ctx = container_of(fp->private_data, > >> + struct se_if_device_ctx, > >> + miscdev); > >> + struct se_if_priv *se_if_priv = dev_ctx->priv; > >> + int err = -EINVAL; > >> + > >> + /* Prevent race during change of device context */ > >> + if (down_interruptible(&dev_ctx->fops_lock)) > >> + return -EBUSY; > >> + > >> + switch (cmd) { > >> + case SE_IOCTL_ENABLE_CMD_RCV: > >> + if (!se_if_priv->cmd_receiver_dev) { > >> + se_if_priv->cmd_receiver_dev = dev_ctx; > >> + err = 0; > >> + } > >> + 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_soc_info_handler(dev_ctx, arg); > >> + break; > >> + > >> + default: > >> + err = -EINVAL; > >> + dev_dbg(se_if_priv->dev, > >> + "%s: IOCTL %.8x not supported\n", > >> + dev_ctx->miscdev.name, > >> + cmd); > >> + } > >> + > >> + up(&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) > >> +{ > >> + mbox_free_channel(mbox_chan); > >> +} > >> + > >> +/* interface for managed res to unregister a character device */ > >> +static void if_misc_deregister(void *miscdevice) > >> +{ > >> + misc_deregister(miscdevice); > >> +} > >> + > >> +static int se_if_request_channel(struct device *dev, > >> + struct mbox_chan **chan, > >> + struct mbox_client *cl, > >> + const u8 *name) > >> +{ > >> + struct mbox_chan *t_chan; > >> + int ret = 0; > >> + > >> + t_chan = mbox_request_channel_byname(cl, name); > >> + if (IS_ERR(t_chan)) { > >> + ret = PTR_ERR(t_chan); > >> + if (ret != -EPROBE_DEFER) > >> + dev_err(dev, > >> + "Failed to request chan %s ret %d\n", name, > >> + ret); > >> + goto exit; > >> + } > >> + > >> + ret = devm_add_action(dev, if_mbox_free_channel, t_chan); > >> + if (ret) { > >> + dev_err(dev, "failed to add devm removal of mbox %s\n", name); > >> + goto exit; > >> + } > >> + > >> + *chan = t_chan; > >> + > >> +exit: > >> + return ret; > >> +} > >> + > >> +static int se_probe_if_cleanup(struct platform_device *pdev) > >> +{ > >> + struct device *dev = &pdev->dev; > >> + struct se_if_priv *priv; > >> + int ret = 0; > >> + int i; > >> + > >> + priv = dev_get_drvdata(dev); > >> + if (!priv) { > >> + ret = 0; > >> + dev_dbg(dev, "SE-MU Priv data is NULL;"); > >> + return ret; > >> + } > >> + > >> + if (priv->tx_chan) > >> + mbox_free_channel(priv->tx_chan); > >> + if (priv->rx_chan) > >> + mbox_free_channel(priv->rx_chan); > >> + > >> + /* free the buffer in se remove, previously allocated > >> + * in se probe to store encrypted IMEM > >> + */ > >> + if (priv->imem.buf) { > >> + dmam_free_coherent(dev, > >> + ELE_IMEM_SIZE, > >> + priv->imem.buf, > >> + priv->imem.phyaddr); > >> + priv->imem.buf = NULL; > >> + } > >> + > >> + if (priv->ctxs) { > >> + for (i = 0; i < priv->max_dev_ctx; i++) { > >> + if (priv->ctxs[i]) { > >> + devm_remove_action(dev, > >> + if_misc_deregister, > >> + &priv->ctxs[i]->miscdev); > >> + misc_deregister(&priv->ctxs[i]->miscdev); > >> + devm_kfree(dev, priv->ctxs[i]); > >> + } > >> + } > >> + devm_kfree(dev, priv->ctxs); > >> + } > >> + > >> + if (priv->flags & RESERVED_DMA_POOL) { > >> + of_reserved_mem_device_release(dev); > >> + priv->flags &= (~RESERVED_DMA_POOL); > >> + } > >> + > >> + devm_kfree(dev, priv); > >> + of_node_put(dev->of_node); > >> + of_platform_device_destroy(dev, NULL); > >> + > >> + return ret; > >> +} > >> + > >> +static int se_probe_cleanup(struct platform_device *pdev) > >> +{ > >> + struct device *dev = &pdev->dev; > >> + struct device_node *if_dn; > >> + > >> + /* Enumerate se-interface device nodes. */ > >> + for_each_child_of_node(dev->of_node, if_dn) { > >> + struct platform_device *if_pdev > >> + = of_find_device_by_node(if_dn); > >> + if (se_probe_if_cleanup(if_pdev)) > >> + dev_err(dev, > >> + "Failed to clean-up child node probe.\n"); > >> + } > >> + > >> + return 0; > >> +} > >> + > >> +static int init_device_context(struct device *dev) > >> +{ > >> + const struct imx_se_node_info *info; > >> + struct se_if_device_ctx *dev_ctx; > >> + struct se_if_priv *priv; > >> + u8 *devname; > >> + int ret = 0; > >> + int i; > >> + > >> + priv = dev_get_drvdata(dev); > >> + > >> + if (!priv) { > >> + ret = -EINVAL; > >> + dev_err(dev, "Invalid SE-MU Priv data"); > >> + return ret; > >> + } > >> + info = priv->info; > >> + > >> + priv->ctxs = devm_kzalloc(dev, sizeof(dev_ctx) * priv->max_dev_ctx, > >> + GFP_KERNEL); > >> + > >> + if (!priv->ctxs) { > >> + ret = -ENOMEM; > >> + return ret; > >> + } > >> + > >> + /* Create users */ > >> + for (i = 0; i < priv->max_dev_ctx; i++) { > >> + dev_ctx = devm_kzalloc(dev, sizeof(*dev_ctx), GFP_KERNEL); > >> + if (!dev_ctx) { > >> + ret = -ENOMEM; > >> + return ret; > >> + } > >> + > >> + dev_ctx->dev = dev; > >> + dev_ctx->status = MU_FREE; > >> + dev_ctx->priv = priv; > >> + > >> + priv->ctxs[i] = dev_ctx; > >> + > >> + /* Default value invalid for an header. */ > >> + init_waitqueue_head(&dev_ctx->wq); > >> + > >> + INIT_LIST_HEAD(&dev_ctx->pending_out); > >> + INIT_LIST_HEAD(&dev_ctx->pending_in); > >> + sema_init(&dev_ctx->fops_lock, 1); > >> + > >> + devname = devm_kasprintf(dev, GFP_KERNEL, "%s_ch%d", > >> + info->se_name, i); > >> + if (!devname) { > >> + ret = -ENOMEM; > >> + return ret; > >> + } > >> + > >> + dev_ctx->miscdev.name = devname; > >> + dev_ctx->miscdev.minor = MISC_DYNAMIC_MINOR; > >> + dev_ctx->miscdev.fops = &se_if_fops; > >> + dev_ctx->miscdev.parent = dev; > >> + ret = misc_register(&dev_ctx->miscdev); > >> + if (ret) { > >> + dev_err(dev, "failed to register misc device %d\n", > >> + ret); > >> + return ret; > >> + } > >> + > >> + ret = devm_add_action(dev, if_misc_deregister, > >> + &dev_ctx->miscdev); > >> + if (ret) { > >> + dev_err(dev, > >> + "failed[%d] to add action to the misc-dev\n", > >> + ret); > >> + return ret; > >> + } > >> + } > >> + > >> + return ret; > >> +} > >> + > >> +static void se_load_firmware(const struct firmware *fw, void *context) > >> +{ > >> + struct se_if_priv *priv = (struct se_if_priv *) context; > >> + const struct imx_se_node_info *info = priv->info; > >> + const u8 *se_fw_name = info->fw_name_in_rfs; > >> + phys_addr_t se_fw_phyaddr; > >> + u8 *se_fw_buf; > >> + > >> + if (!fw) { > >> + if (priv->fw_fail > MAX_FW_LOAD_RETRIES) > >> + dev_dbg(priv->dev, > >> + "External FW not found, using ROM FW.\n"); > >> + else { > >> + /*add a bit delay to wait for firmware priv released */ > >> + msleep(20); > >> + > >> + /* Load firmware one more time if timeout */ > >> + request_firmware_nowait(THIS_MODULE, > >> + FW_ACTION_UEVENT, info->fw_name_in_rfs, > >> + priv->dev, GFP_KERNEL, priv, > >> + se_load_firmware); > >> + priv->fw_fail++; > >> + dev_dbg(priv->dev, "Value of retries = 0x%x.\n", > >> + priv->fw_fail); > >> + } > >> + > >> + return; > >> + } > >> + > >> + /* allocate buffer to store the SE FW */ > >> + se_fw_buf = dmam_alloc_coherent(priv->dev, fw->size, > >> + &se_fw_phyaddr, > >> + GFP_KERNEL); > >> + if (!se_fw_buf) { > >> + dev_err(priv->dev, "Failed to alloc SE fw buffer memory\n"); > >> + goto exit; > >> + } > >> + > >> + memcpy(se_fw_buf, fw->data, fw->size); > >> + > >> + if (ele_fw_authenticate(priv->dev, se_fw_phyaddr)) > >> + dev_err(priv->dev, > >> + "Failed to authenticate & load SE firmware %s.\n", > >> + se_fw_name); > >> + > >> +exit: > >> + dmam_free_coherent(priv->dev, > >> + fw->size, > >> + se_fw_buf, > >> + se_fw_phyaddr); > >> + > >> + release_firmware(fw); > >> +} > >> + > >> +static int se_if_probe(struct platform_device *pdev) > >> +{ > >> + struct imx_se_node_info_list *info_list; > >> + struct device *dev = &pdev->dev; > >> + struct imx_se_node_info *info; > >> + struct se_if_priv *priv; > >> + u32 idx; > >> + int ret; > >> + > >> + if (of_property_read_u32(dev->of_node, "reg", &idx)) { > >> + ret = -EINVAL; > >> + goto exit; > >> + } > >> + > >> + info_list = (struct imx_se_node_info_list *) > >> + device_get_match_data(dev->parent); > >> + info = get_imx_se_node_info(info_list, idx); > >> + > >> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > >> + if (!priv) { > >> + ret = -ENOMEM; > >> + goto exit; > >> + } > >> + > >> + dev_set_drvdata(dev, priv); > >> + > >> + /* Mailbox client configuration */ > >> + priv->se_mb_cl.dev = dev; > >> + priv->se_mb_cl.tx_block = false; > >> + priv->se_mb_cl.knows_txdone = true; > >> + priv->se_mb_cl.rx_callback = se_if_rx_callback; > >> + > >> + ret = se_if_request_channel(dev, &priv->tx_chan, > >> + &priv->se_mb_cl, info->mbox_tx_name); > >> + if (ret) { > >> + if (ret == -EPROBE_DEFER) > >> + dev_err(dev, "Mailbox tx channel, is not ready.\n"); > >> + else > >> + dev_err(dev, "Failed to request tx channel\n"); > >> + > >> + goto exit; > >> + } > >> + > >> + ret = se_if_request_channel(dev, &priv->rx_chan, > >> + &priv->se_mb_cl, info->mbox_rx_name); > >> + if (ret) { > >> + if (ret == -EPROBE_DEFER) > >> + dev_err(dev, "Mailbox rx channel, is not ready.\n"); > >> + else > >> + dev_dbg(dev, "Failed to request rx channel\n"); > >> + > >> + goto exit; > >> + } > >> + > >> + priv->dev = dev; > >> + priv->info = info; > >> + > >> + /* Initialize the mutex. */ > >> + mutex_init(&priv->se_if_lock); > >> + mutex_init(&priv->se_if_cmd_lock); > >> + > >> + priv->cmd_receiver_dev = NULL; > >> + priv->waiting_rsp_dev = NULL; > >> + priv->max_dev_ctx = info->max_dev_ctx; > >> + priv->cmd_tag = info->cmd_tag; > >> + priv->rsp_tag = info->rsp_tag; > >> + priv->mem_pool_name = info->pool_name; > >> + priv->success_tag = info->success_tag; > >> + priv->base_api_ver = info->base_api_ver; > >> + priv->fw_api_ver = info->fw_api_ver; > >> + > >> + init_completion(&priv->done); > >> + spin_lock_init(&priv->lock); > >> + > >> + if (info->reserved_dma_ranges) { > >> + ret = of_reserved_mem_device_init(dev); > >> + if (ret) { > >> + dev_err(dev, > >> + "failed to init reserved memory region %d\n", > >> + ret); > >> + priv->flags &= (~RESERVED_DMA_POOL); > >> + goto exit; > >> + } > >> + priv->flags |= RESERVED_DMA_POOL; > >> + } > >> + > >> + if (info->fw_name_in_rfs) { > >> + ret = request_firmware_nowait(THIS_MODULE, > >> + FW_ACTION_UEVENT, > >> + info->fw_name_in_rfs, > >> + dev, GFP_KERNEL, priv, > >> + se_load_firmware); > >> + if (ret) > >> + dev_warn(dev, "Failed to get firmware [%s].\n", > >> + info->fw_name_in_rfs); > >> + } > >> + > >> + ret = imx_fetch_soc_info(dev); > >> + if (ret) { > >> + dev_err(dev, > >> + "failed[%d] to fetch SoC Info\n", ret); > >> + goto exit; > >> + } > >> + > >> + if (info->imem_mgmt) { > >> + /* allocate buffer where SE store encrypted IMEM */ > >> + priv->imem.buf = dmam_alloc_coherent(dev, ELE_IMEM_SIZE, > >> + &priv->imem.phyaddr, > >> + GFP_KERNEL); > >> + if (!priv->imem.buf) { > >> + dev_err(dev, > >> + "dmam-alloc-failed: To store encr-IMEM.\n"); > >> + ret = -ENOMEM; > >> + goto exit; > >> + } > >> + } > >> + > >> + if (info->max_dev_ctx) { > >> + ret = init_device_context(dev); > >> + if (ret) { > >> + dev_err(dev, > >> + "Failed[0x%x] to create device contexts.\n", > >> + ret); > >> + goto exit; > >> + } > >> + } > >> + > >> + dev_info(dev, "i.MX secure-enclave: %s interface to firmware, > configured.\n", > >> + info->se_name); > >> + return devm_of_platform_populate(dev); > >> + > >> +exit: > >> + /* if execution control reaches here, if probe fails. > >> + * hence doing the cleanup > >> + */ > >> + if (se_probe_if_cleanup(pdev)) > >> + dev_err(dev, > >> + "Failed to clean-up the child node probe.\n"); > >> + > >> + return ret; > >> +} > >> + > >> +static int se_probe(struct platform_device *pdev) > >> +{ > >> + struct device_node *enum_dev_node; > >> + struct device *dev = &pdev->dev; > >> + int enum_count; > >> + int ret; > >> + > >> + enum_count = of_get_child_count(dev->of_node); > >> + if (!enum_count) { > >> + ret = -EINVAL; > >> + dev_err(dev, "Zero Tx/Rx path MU nodes.\n"); > >> + return ret; > >> + } > >> + > >> + for_each_child_of_node(dev->of_node, enum_dev_node) { > >> + struct platform_device *enum_plat_dev __maybe_unused; > >> + > >> + if (!of_device_is_available(enum_dev_node)) > >> + continue; > >> + > >> + enum_plat_dev = of_platform_device_create(enum_dev_node, > >> + NULL, > >> + dev); > >> + if (!enum_plat_dev) { > >> + ret = -EINVAL; > >> + of_node_put(enum_dev_node); > >> + dev_err(dev, > >> + "Failed to create enumerated platform device."); > >> + break; > >> + } > >> + > >> + ret = se_if_probe(enum_plat_dev); > >> + } > >> + return ret; > >> +} > >> + > >> +static int se_remove(struct platform_device *pdev) > >> +{ > >> + if (se_probe_cleanup(pdev)) > >> + dev_err(&pdev->dev, > >> + "i.MX Secure Enclave is not cleanly un-probed."); > >> + > >> + return 0; > >> +} > >> + > >> +static int se_suspend(struct device *dev) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev); > >> + const struct imx_se_node_info *info > >> + = priv->info; > >> + > >> + if (info && info->imem_mgmt) > >> + priv->imem.size = se_save_imem_state(dev); > >> + > >> + return 0; > >> +} > >> + > >> +static int se_resume(struct device *dev) > >> +{ > >> + struct se_if_priv *priv = dev_get_drvdata(dev); > >> + const struct imx_se_node_info *info > >> + = priv->info; > >> + int i; > >> + > >> + for (i = 0; i < priv->max_dev_ctx; i++) > >> + wake_up_interruptible(&priv->ctxs[i]->wq); > >> + > >> + if (info && info->imem_mgmt) > >> + se_restore_imem_state(dev); > >> + > >> + return 0; > >> +} > >> + > >> +static const struct dev_pm_ops se_pm = { > >> + RUNTIME_PM_OPS(se_suspend, se_resume, NULL) > >> +}; > >> + > >> +static struct platform_driver se_driver = { > >> + .driver = { > >> + .name = "fsl-se-fw", > >> + .of_match_table = se_match, > >> + .pm = &se_pm, > >> + }, > >> + .probe = se_probe, > >> + .remove = se_remove, > >> +}; > >> +MODULE_DEVICE_TABLE(of, se_match); > >> + > >> +module_platform_driver(se_driver); > >> + > >> +MODULE_AUTHOR("Pankaj Gupta <pankaj.gupta@xxxxxxx>"); > >> +MODULE_DESCRIPTION("iMX Secure Enclave Driver."); > >> +MODULE_LICENSE("GPL"); > >> diff --git a/drivers/firmware/imx/se_ctrl.h > b/drivers/firmware/imx/se_ctrl.h > >> new file mode 100644 > >> index 000000000000..76e1ce77c52f > >> --- /dev/null > >> +++ b/drivers/firmware/imx/se_ctrl.h > >> @@ -0,0 +1,151 @@ > >> +/* SPDX-License-Identifier: GPL-2.0+ */ > >> +/* > >> + * Copyright 2024 NXP > >> + */ > >> + > >> +#ifndef SE_MU_H > >> +#define SE_MU_H > >> + > >> +#include <linux/miscdevice.h> > >> +#include <linux/semaphore.h> > >> +#include <linux/mailbox_client.h> > >> + > >> +#define MAX_FW_LOAD_RETRIES 50 > >> + > >> +#define MSG_TAG(x) (((x) & 0xff000000) >> 24) > >> +#define MSG_COMMAND(x) (((x) & 0x00ff0000) >> 16) > >> +#define MSG_SIZE(x) (((x) & 0x0000ff00) >> 8) > >> +#define MSG_VER(x) ((x) & 0x000000ff) > >> +#define RES_STATUS(x) ((x) & 0x000000ff) > >> +#define MAX_DATA_SIZE_PER_USER (65 * 1024) > >> +#define S4_DEFAULT_MUAP_INDEX (2) > >> +#define S4_MUAP_DEFAULT_MAX_USERS (4) > >> +#define MESSAGING_VERSION_6 0x6 > >> +#define MESSAGING_VERSION_7 0x7 > >> + > >> +#define DEFAULT_MESSAGING_TAG_COMMAND (0x17u) > >> +#define DEFAULT_MESSAGING_TAG_RESPONSE (0xe1u) > >> + > >> +#define SE_MU_IO_FLAGS_USE_SEC_MEM (0x02u) > >> +#define SE_MU_IO_FLAGS_USE_SHORT_ADDR (0x04u) > >> + > >> +struct se_imem_buf { > >> + u8 *buf; > >> + phys_addr_t phyaddr; > >> + u32 size; > >> +}; > >> + > >> +struct se_buf_desc { > >> + u8 *shared_buf_ptr; > >> + u8 *usr_buf_ptr; > >> + u32 size; > >> + struct list_head link; > >> +}; > >> + > >> +/* Status of a char device */ > >> +enum se_if_dev_ctx_status_t { > >> + MU_FREE, > >> + MU_OPENED > >> +}; > >> + > >> +struct se_shared_mem { > >> + dma_addr_t dma_addr; > >> + u32 size; > >> + u32 pos; > >> + u8 *ptr; > >> +}; > >> + > >> +/* Private struct for each char device instance. */ > >> +struct se_if_device_ctx { > >> + struct device *dev; > >> + struct se_if_priv *priv; > >> + struct miscdevice miscdev; > >> + > >> + enum se_if_dev_ctx_status_t status; > >> + wait_queue_head_t wq; > >> + struct semaphore fops_lock; > >> + > >> + u32 pending_hdr; > >> + struct list_head pending_in; > >> + struct list_head pending_out; > >> + > >> + struct se_shared_mem secure_mem; > >> + struct se_shared_mem non_secure_mem; > >> + > >> + u32 *temp_resp; > >> + u32 temp_resp_size; > >> + struct notifier_block se_notify; > >> +}; > >> + > >> +/* Header of the messages exchange with the EdgeLock Enclave */ > >> +struct se_msg_hdr { > >> + u8 ver; > >> + u8 size; > >> + u8 command; > >> + u8 tag; > >> +} __packed; > >> + > >> +#define SE_MU_HDR_SZ 4 > >> +#define TAG_OFFSET (SE_MU_HDR_SZ - 1) > >> +#define CMD_OFFSET (SE_MU_HDR_SZ - 2) > >> +#define SZ_OFFSET (SE_MU_HDR_SZ - 3) > >> +#define VER_OFFSET (SE_MU_HDR_SZ - 4) > >> + > >> +struct se_api_msg { > >> + u32 header; /* u8 Tag; u8 Command; u8 Size; u8 Ver; */ > >> + u32 *data; > >> +}; > >> + > >> +struct se_if_priv { > >> + struct se_if_device_ctx *cmd_receiver_dev; > >> + struct se_if_device_ctx *waiting_rsp_dev; > >> + bool no_dev_ctx_used; > >> + /* > >> + * prevent parallel access to the se interface registers > >> + * e.g. a user trying to send a command while the other one is > >> + * sending a response. > >> + */ > >> + struct mutex se_if_lock; > >> + /* > >> + * prevent a command to be sent on the se interface while another one > is > >> + * still processing. (response to a command is allowed) > >> + */ > >> + struct mutex se_if_cmd_lock; > >> + struct device *dev; > >> + u8 *mem_pool_name; > >> + u8 cmd_tag; > >> + u8 rsp_tag; > >> + u8 success_tag; > >> + u8 base_api_ver; > >> + u8 fw_api_ver; > >> + u32 fw_fail; > >> + const void *info; > >> + > >> + struct mbox_client se_mb_cl; > >> + struct mbox_chan *tx_chan, *rx_chan; > >> + struct se_api_msg *rx_msg; > >> + struct completion done; > >> + spinlock_t lock; > >> + /* > >> + * Flag to retain the state of initialization done at > >> + * the time of se-mu probe. > >> + */ > >> + uint32_t flags; > >> + u8 max_dev_ctx; > >> + struct se_if_device_ctx **ctxs; > >> + struct se_imem_buf imem; > >> +}; > >> + > >> +void *get_phy_buf_mem_pool(struct device *dev, > >> + u8 *mem_pool_name, > >> + dma_addr_t *buf, > >> + u32 size); > >> +phys_addr_t get_phy_buf_mem_pool1(struct device *dev, > >> + u8 *mem_pool_name, > >> + u32 **buf, > >> + u32 size); > >> +void free_phybuf_mem_pool(struct device *dev, > >> + u8 *mem_pool_name, > >> + u32 *buf, > >> + u32 size); > >> +#endif > >> diff --git a/include/linux/firmware/imx/se_api.h > b/include/linux/firmware/imx/se_api.h > >> new file mode 100644 > >> index 000000000000..c47f84906837 > >> --- /dev/null > >> +++ b/include/linux/firmware/imx/se_api.h > >> @@ -0,0 +1,14 @@ > >> +/* SPDX-License-Identifier: GPL-2.0+ */ > >> +/* > >> + * Copyright 2024 NXP > >> + */ > >> + > >> +#ifndef __SE_API_H__ > >> +#define __SE_API_H__ > >> + > >> +#include <linux/types.h> > >> + > >> +#define SOC_ID_OF_IMX8ULP 0x084D > >> +#define SOC_ID_OF_IMX93 0x9300 > >> + > >> +#endif /* __SE_API_H__ */ > >> diff --git a/include/uapi/linux/se_ioctl.h b/include/uapi/linux/se_ioctl.h > >> new file mode 100644 > >> index 000000000000..f68a36e9da2c > >> --- /dev/null > >> +++ b/include/uapi/linux/se_ioctl.h > >> @@ -0,0 +1,88 @@ > >> +/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR BSD-3- > Clause*/ > >> +/* > >> + * Copyright 2024 NXP > >> + */ > >> + > >> +#ifndef SE_IOCTL_H > >> +#define SE_IOCTL_H > >> + > >> +/* IOCTL definitions. */ > >> + > >> +struct se_ioctl_setup_iobuf { > >> + u8 *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_signed_message { > >> + u8 *message; > >> + u32 msg_size; > >> + u32 error_code; > >> +}; > >> + > >> +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) > >> + > >> +#endif > >> > >> -- > >> 2.34.1 > >> > > > > _______________________________________________ > > linux-arm-kernel mailing list > > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefe > nse.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttp- > 3A__lists.infradead.org_mailman_listinfo_linux-2Darm- > 2Dkernel%26d%3DDwICAg%26c%3DnKjWec2b6R0mOyPaz7xtfQ%26r%3DV_ > GK7jRuCHDErm6txmgDK1-MbUihtnSQ3gPgB-A- > JKU%26m%3DeKFfdy51aVVEAe4I9Lk2CN77y_4Hxf2pI_9fv5pVWLo9DwQNgC > pca6smAwvwFycf%26s%3D187NgAc1LvHOnaB90o76OtTVe5J2eG- > Y6Xgp05PQpBY%26e%3D&data=05%7C02%7Cpankaj.gupta%40nxp.com%7C1 > 11dd89e61f149b5f7e708dc71290348%7C686ea1d3bc2b4c6fa92cd99c5c3016 > 35%7C0%7C0%7C638509668202255142%7CUnknown%7CTWFpbGZsb3d8eyJ > WIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D% > 7C0%7C%7C%7C&sdata=sgoXx408lERnChy2nfitsuD8MiGHh%2FN2gTk9cdzqd > 9w%3D&reserved=0
