Add tee client application which will be used for HDCP 1.x and 2.x authentication in DisplayPort.
Changes in v3: - remove useless define - refine the return value - remove the define which control the log output - remove the struct hdcp2_handler for HDCP 2.X - refine the struct for the HDCP information per suggestion from the previous thread: https://patchwork.kernel.org/project/linux-mediatek /patch/20240205055055.25340-2-mac.s...@mediatek.com/ Signed-off-by: mac.shen <mac.s...@mediatek.com> --- drivers/gpu/drm/mediatek/Makefile | 5 +- drivers/gpu/drm/mediatek/tci.h | 143 ++++++ drivers/gpu/drm/mediatek/tlc_dp_hdcp.c | 595 +++++++++++++++++++++++++ drivers/gpu/drm/mediatek/tlc_dp_hdcp.h | 133 ++++++ 4 files changed, 875 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/mediatek/tci.h create mode 100644 drivers/gpu/drm/mediatek/tlc_dp_hdcp.c create mode 100644 drivers/gpu/drm/mediatek/tlc_dp_hdcp.h diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile index 32a2ed6c0cfe..f27ddfbd2e12 100644 --- a/drivers/gpu/drm/mediatek/Makefile +++ b/drivers/gpu/drm/mediatek/Makefile @@ -27,4 +27,7 @@ mediatek-drm-hdmi-objs := mtk_cec.o \ obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mediatek-drm-hdmi.o -obj-$(CONFIG_DRM_MEDIATEK_DP) += mtk_dp.o +mtk-dp-objs := tlc_dp_hdcp.o \ + mtk_dp.o + +obj-$(CONFIG_DRM_MEDIATEK_DP) += mtk-dp.o diff --git a/drivers/gpu/drm/mediatek/tci.h b/drivers/gpu/drm/mediatek/tci.h new file mode 100644 index 000000000000..48710ce5d391 --- /dev/null +++ b/drivers/gpu/drm/mediatek/tci.h @@ -0,0 +1,143 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2019-2024 MediaTek Inc. + */ + +#ifndef _TCI_H_ +#define _TCI_H_ + +#include <drm/display/drm_hdcp.h> + +#define CMD_DEVICE_ADDED 1 +#define CMD_DEVICE_REMOVE 2 +#define CMD_WRITE_VAL 3 +#define CMD_DEVICE_CLEAN 4 +#define CMD_ENABLE_ENCRYPT 5 + +/* V1.x */ +#define CMD_CALCULATE_LM 11 +#define CMD_COMPARE_R0 12 +#define CMD_COMPARE_V1 13 +#define CMD_GET_AKSV 14 + +/* V2.x */ +#define CMD_AKE_CERTIFICATE 20 +#define CMD_ENC_KM 21 +#define CMD_AKE_H_PRIME 22 +#define CMD_AKE_PARING 23 +#define CMD_LC_L_PRIME 24 +#define CMD_SKE_CAL_EKS 26 +#define CMD_COMPARE_V2 27 +#define CMD_COMPARE_M 28 + +#define TYPE_HDCP_PARAM_AN 10 +#define TYPE_HDCP_PARAM_RST_1 11 +#define TYPE_HDCP_PARAM_RST_2 12 +#define TYPE_HDCP_ENABLE_ENCRYPT 13 +#define TYPE_HDCP_DISABLE_ENCRYPT 14 + +/* reserved:2 */ +#define HDCP2_CERTRX_LEN (HDCP_2_2_RECEIVER_ID_LEN + HDCP_2_2_K_PUB_RX_LEN + \ + 2 + HDCP_2_2_DCP_LLC_SIG_LEN) +/* version:1 */ +#define HDCP_2_2_TXCAPS_LEN (HDCP_2_2_TXCAP_MASK_LEN + 1) +#define PARAM_LEN 1024 + +#define TCI_LENGTH sizeof(struct tci_t) + +struct cmd_hdcp_init_for_verion_t { + u32 version; + bool need_load_key; +}; + +struct cmd_hdcp_write_val_t { + u8 type; + u8 len; + u8 val[DRM_HDCP_AN_LEN]; +}; + +struct cmd_hdcp_calculate_lm_t { + u8 bksv[DRM_HDCP_KSV_LEN]; +}; + +struct cmd_hdcp_get_aksv_t { + u8 aksv[DRM_HDCP_KSV_LEN]; +}; + +struct cmd_hdcp_ake_certificate_t { + u8 certification[HDCP2_CERTRX_LEN]; + bool stored; + u8 m[HDCP_2_2_E_KH_KM_M_LEN - HDCP_2_2_E_KH_KM_LEN]; + u8 ekm[HDCP_2_2_E_KH_KM_LEN]; +}; + +struct cmd_hdcp_ake_paring_t { + u8 ekm[HDCP_2_2_E_KH_KM_LEN]; +}; + +struct cmd_hdcp_enc_km_t { + u8 enc_km[HDCP_2_2_E_KPUB_KM_LEN]; +}; + +struct cmd_hdcp_ake_h_prime_t { + u8 rtx[HDCP_2_2_RTX_LEN]; + u8 rrx[HDCP_2_2_RRX_LEN]; + u8 rx_caps[HDCP_2_2_RXCAPS_LEN]; + u8 tx_caps[HDCP_2_2_TXCAPS_LEN]; + u32 rx_h_len; + u8 rx_h[HDCP_2_2_H_PRIME_LEN]; +}; + +struct cmd_hdcp_lc_l_prime_t { + u8 rn[HDCP_2_2_RN_LEN]; + u32 rx_l_len; + u8 rx_l[HDCP_2_2_L_PRIME_LEN]; +}; + +struct cmd_hdcp_ske_eks_t { + u8 riv[HDCP_2_2_RIV_LEN]; + u32 eks_len; + u32 eks; +}; + +struct cmd_hdcp_compare_t { + u32 rx_val_len; + u8 rx_val[HDCP_2_2_MPRIME_LEN]; + u32 param_len; + u8 param[PARAM_LEN]; + u32 out_len; + u32 out; +}; + +union tci_cmd_body_t { + /* Init with special HDCP version */ + struct cmd_hdcp_init_for_verion_t cmd_hdcp_init_for_verion; + /* Write uint32 data to hw */ + struct cmd_hdcp_write_val_t cmd_hdcp_write_val; + /* Get aksv */ + struct cmd_hdcp_get_aksv_t cmd_hdcp_get_aksv; + /* Calculate r0 */ + struct cmd_hdcp_calculate_lm_t cmd_hdcp_calculate_lm; + /* Generate signature for certificate */ + struct cmd_hdcp_ake_certificate_t cmd_hdcp_ake_certificate; + /* To store ekm */ + struct cmd_hdcp_ake_paring_t cmd_hdcp_ake_paring; + /* Encrypt km for V2.2 */ + struct cmd_hdcp_enc_km_t cmd_hdcp_enc_km; + /* Compute H prime */ + struct cmd_hdcp_ake_h_prime_t cmd_hdcp_ake_h_prime; + /* Compute L prime */ + struct cmd_hdcp_lc_l_prime_t cmd_hdcp_lc_l_prime; + /* Compute eks */ + struct cmd_hdcp_ske_eks_t cmd_hdcp_ske_eks; + /* Compare */ + struct cmd_hdcp_compare_t cmd_hdcp_compare; +} __packed; + +struct tci_t { + u32 command_id; + u32 return_code; + union tci_cmd_body_t cmd_body; +}; + +#endif /* _TCI_H_ */ diff --git a/drivers/gpu/drm/mediatek/tlc_dp_hdcp.c b/drivers/gpu/drm/mediatek/tlc_dp_hdcp.c new file mode 100644 index 000000000000..8ae0548ae022 --- /dev/null +++ b/drivers/gpu/drm/mediatek/tlc_dp_hdcp.c @@ -0,0 +1,595 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019-2024 MediaTek Inc. + */ + +#include <linux/types.h> +#include <linux/string.h> +#include <linux/slab.h> +#include "tlc_dp_hdcp.h" + +#define DEFAULT_WRITE_VAL_LEN 1 +#define DEFAULT_WRITE_VAL 0 + +/* + * TA_FTPM_UUID: 99975014-3c7c-54ea-8487-a80d215ea92c + * + * Randomly generated, and must correspond to the GUID on the TA side. + * Defined here in the reference implementation: + * https://github.com/microsoft/ms-tpm-20-ref/blob/master/Samples/ARM32-FirmwareTPM/optee_ta/fTPM/include/fTPM.h#L42 + */ +static const uuid_t dp_ta_uuid = + UUID_INIT(0x99975014, 0x3c7c, 0x54ea, + 0x84, 0x87, 0xa8, 0x0d, 0x21, 0x5e, 0xa9, 0x2c); + +/* Send dp commands through the TEE shared memory */ +static int dp_tee_op_send(struct dp_tee_private *dp_tee_priv, size_t len, u32 cmd_id) +{ + struct tee_ioctl_invoke_arg transceive_args; + struct tee_shm *shm = dp_tee_priv->shm; + struct tee_param command_params[4]; + u8 *temp_buf; + int rc; + + if (len > MAX_COMMAND_SIZE) { + pr_err("[TLC_HDCP] Len %zd exceeds MAX_COMMAND_SIZE supported by dp TA\n", len); + return -EINVAL; + } + + memset(&transceive_args, 0, sizeof(transceive_args)); + memset(command_params, 0, sizeof(command_params)); + dp_tee_priv->resp_len = 0; + + /* Invoke FTPM_OPTEE_TA_SUBMIT_COMMAND function of dp TA */ + transceive_args = (struct tee_ioctl_invoke_arg) { + .func = cmd_id, + .session = dp_tee_priv->session, + .num_params = 4, + }; + + /* Fill FTPM_OPTEE_TA_SUBMIT_COMMAND parameters */ + command_params[0] = (struct tee_param) { + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT, + .u.memref = { + .shm = shm, + .size = len, + .shm_offs = 0, + }, + }; + + command_params[1] = (struct tee_param) { + .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT, + .u.memref = { + .shm = shm, + .size = MAX_RESPONSE_SIZE, + .shm_offs = MAX_COMMAND_SIZE, + }, + }; + + rc = tee_client_invoke_func(dp_tee_priv->ctx, &transceive_args, command_params); + if (rc < 0 || transceive_args.ret != 0) { + pr_err("[TLC_HDCP] rc:%d, invoke error:0x%x\n", rc, transceive_args.ret); + return -EBUSY; + } + + temp_buf = tee_shm_get_va(shm, command_params[1].u.memref.shm_offs); + if (IS_ERR(temp_buf)) { + pr_err("[TLC_HDCP] tee_shm_get_va failed for receive\n"); + return -ENOMEM; + } + + /* Sanity checks look good, cache the response */ + memcpy(dp_tee_priv->resp_buf, temp_buf, MAX_RESPONSE_SIZE / 2); + dp_tee_priv->resp_len = MAX_RESPONSE_SIZE / 2; + + return 0; +} + +/* + * Check whether this driver supports the dp TA in the TEE instance + * represented by the params (ver/data) to this function. + * + * Note that currently this driver only supports GP Compliant OPTEE + * based dp TA. + */ +static int dp_tee_match(struct tee_ioctl_version_data *ver, const void *data) +{ + return ver->impl_id == TEE_IMPL_ID_OPTEE && + ver->gen_caps & TEE_GEN_CAP_GP; +} + +int tee_add_device(struct mtk_hdcp_info *hdcp_info, u32 version) +{ + struct tee_ioctl_open_session_arg sess_arg; + struct dp_tee_private *dp_tee_priv; + struct tci_t *tci; + int rc; + + if (hdcp_info->g_init) + tee_remove_device(hdcp_info); + + dp_tee_priv = kzalloc(sizeof(*dp_tee_priv), GFP_KERNEL); + if (!dp_tee_priv) + return -ENOMEM; + + hdcp_info->g_dp_tee_priv = dp_tee_priv; + + /* Open context with TEE driver */ + dp_tee_priv->ctx = tee_client_open_context(NULL, dp_tee_match, NULL, NULL); + if (IS_ERR(dp_tee_priv->ctx)) { + pr_err("[TLC_HDCP] tee_client_open_context failed\n"); + rc = PTR_ERR(dp_tee_priv->ctx); + goto free_priv; + } + + /* Open a session with dp TA */ + memset(&sess_arg, 0, sizeof(sess_arg)); + export_uuid(sess_arg.uuid, &dp_ta_uuid); + sess_arg.clnt_login = TEE_IOCTL_LOGIN_PUBLIC; + sess_arg.num_params = 0; + + rc = tee_client_open_session(dp_tee_priv->ctx, &sess_arg, NULL); + if (rc < 0 || sess_arg.ret != 0) { + pr_err("[TLC_HDCP] tee_client_open_session failed, err:%x\n", sess_arg.ret); + rc = -EINVAL; + goto out_tee_session; + } + dp_tee_priv->session = sess_arg.session; + + /* Allocate dynamic shared memory with dp TA */ + dp_tee_priv->shm = tee_shm_alloc_kernel_buf(dp_tee_priv->ctx, MAX_COMMAND_SIZE + + MAX_RESPONSE_SIZE); + if (IS_ERR(dp_tee_priv->shm)) { + pr_err("[TLC_HDCP] tee_shm_alloc_kernel_buf failed\n"); + rc = -ENOMEM; + goto out_shm_alloc; + } + + /* Copy parameter for add new device */ + tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + memset(tci, 0, TCI_LENGTH); + tci->command_id = CMD_DEVICE_ADDED; + tci->cmd_body.cmd_hdcp_init_for_verion.version = version; + tci->cmd_body.cmd_hdcp_init_for_verion.need_load_key = true; + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_DEVICE_ADDED); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error:%x\n", rc); + tee_remove_device(hdcp_info); + return rc; + } + + hdcp_info->g_init = true; + + return 0; + +out_shm_alloc: + tee_client_close_session(dp_tee_priv->ctx, dp_tee_priv->session); +out_tee_session: + tee_client_close_context(dp_tee_priv->ctx); +free_priv: + kfree(dp_tee_priv); + + return rc; +} + +void tee_remove_device(struct mtk_hdcp_info *hdcp_info) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + if (!hdcp_info->g_init) + return; + + hdcp_info->g_init = false; + memset(tci, 0, TCI_LENGTH); + tci->command_id = CMD_DEVICE_REMOVE; + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_DEVICE_REMOVE); + if (rc) + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + + /* Free the shared memory pool */ + tee_shm_free(dp_tee_priv->shm); + + /* Close the existing session with fTPM TA */ + tee_client_close_session(dp_tee_priv->ctx, dp_tee_priv->session); + + /* Close the context with TEE driver */ + tee_client_close_context(dp_tee_priv->ctx); + + /* Free the memory */ + kfree(dp_tee_priv); +} + +int tee_clear_paring(struct mtk_hdcp_info *hdcp_info) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + /* Copy parameters */ + memset(tci, 0, TCI_LENGTH); + tci->command_id = CMD_DEVICE_CLEAN; + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_DEVICE_CLEAN); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + return 0; +} + +/* Write An to HW */ +int tee_hdcp1x_set_tx_an(struct mtk_hdcp_info *hdcp_info, u8 *an_code) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_WRITE_VAL; + tci->cmd_body.cmd_hdcp_write_val.len = DRM_HDCP_AN_LEN; + tci->cmd_body.cmd_hdcp_write_val.type = TYPE_HDCP_PARAM_AN; + memcpy(tci->cmd_body.cmd_hdcp_write_val.val, an_code, DRM_HDCP_AN_LEN); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_WRITE_VAL); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + return 0; +} + +int tee_hdcp_enable_encrypt(struct mtk_hdcp_info *hdcp_info, bool enable, u8 version) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_ENABLE_ENCRYPT; + tci->cmd_body.cmd_hdcp_write_val.type = enable ? TYPE_HDCP_ENABLE_ENCRYPT : + TYPE_HDCP_DISABLE_ENCRYPT; + + /* Set HDCP version supportted by device */ + tci->cmd_body.cmd_hdcp_write_val.len = 1; + tci->cmd_body.cmd_hdcp_write_val.val[0] = version; + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_ENABLE_ENCRYPT); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + return 0; +} + +int tee_hdcp1x_soft_rst(struct mtk_hdcp_info *hdcp_info) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_WRITE_VAL; + tci->cmd_body.cmd_hdcp_write_val.type = TYPE_HDCP_PARAM_RST_1; + /* No need input. Set default value 0 for check */ + tci->cmd_body.cmd_hdcp_write_val.len = DEFAULT_WRITE_VAL_LEN; + memset(tci->cmd_body.cmd_hdcp_write_val.val, DEFAULT_WRITE_VAL, DEFAULT_WRITE_VAL_LEN); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_WRITE_VAL); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + return 0; +} + +int tee_hdcp2_soft_rst(struct mtk_hdcp_info *hdcp_info) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + tci->command_id = CMD_WRITE_VAL; + tci->cmd_body.cmd_hdcp_write_val.type = TYPE_HDCP_PARAM_RST_2; + /* No need input. Set default value 0 for check */ + tci->cmd_body.cmd_hdcp_write_val.len = DEFAULT_WRITE_VAL_LEN; + memset(tci->cmd_body.cmd_hdcp_write_val.val, DEFAULT_WRITE_VAL, DEFAULT_WRITE_VAL_LEN); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_WRITE_VAL); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + return 0; +} + +/** V1.X **/ +int tee_get_aksv(struct mtk_hdcp_info *hdcp_info, u8 *aksv) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + struct tci_t *tci_resp; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_GET_AKSV; + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_GET_AKSV); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + tci_resp = (struct tci_t *)dp_tee_priv->resp_buf; + memcpy(aksv, tci_resp->cmd_body.cmd_hdcp_get_aksv.aksv, DRM_HDCP_KSV_LEN); + + return 0; +} + +/* Calculate Km base on Bksv and write it to HW */ +int tee_calculate_lm(struct mtk_hdcp_info *hdcp_info, u8 *bksv) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_CALCULATE_LM; + memcpy(tci->cmd_body.cmd_hdcp_calculate_lm.bksv, bksv, DRM_HDCP_KSV_LEN); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_CALCULATE_LM); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + return 0; +} + +/* Get r0 from HW and compare to rx_r0 */ +int tee_compare_r0(struct mtk_hdcp_info *hdcp_info, u8 *r0, u32 len) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_COMPARE_R0; + tci->cmd_body.cmd_hdcp_compare.rx_val_len = len; + memcpy(tci->cmd_body.cmd_hdcp_compare.rx_val, r0, len); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_COMPARE_R0); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + return 0; +} + +/* Compute and compare v value */ +int tee_hdcp1x_compute_compare_v(struct mtk_hdcp_info *hdcp_info, + u8 *crypto_param, u32 param_len, u8 *rx_v) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_COMPARE_V1; + tci->cmd_body.cmd_hdcp_compare.rx_val_len = 20; + tci->cmd_body.cmd_hdcp_compare.param_len = param_len; + memcpy(tci->cmd_body.cmd_hdcp_compare.rx_val, rx_v, 20); + memcpy(tci->cmd_body.cmd_hdcp_compare.param, crypto_param, param_len); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_COMPARE_V1); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + return 0; +} + +/** V2.X **/ +int tee_ake_certificate(struct mtk_hdcp_info *hdcp_info, + u8 *certificate, bool *stored, u8 *out_m, u8 *out_ekm) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + struct tci_t *tci_resp; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_AKE_CERTIFICATE; + memcpy(tci->cmd_body.cmd_hdcp_ake_certificate.certification, + certificate, HDCP2_CERTRX_LEN); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_AKE_CERTIFICATE); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + pr_info("[TLC_HDCP] verify signature: result %d\n", rc); + tci_resp = (struct tci_t *)dp_tee_priv->resp_buf; + *stored = tci_resp->cmd_body.cmd_hdcp_ake_certificate.stored; + memcpy(out_m, tci_resp->cmd_body.cmd_hdcp_ake_certificate.m, + HDCP_2_2_E_KH_KM_M_LEN - HDCP_2_2_E_KH_KM_LEN); + memcpy(out_ekm, tci_resp->cmd_body.cmd_hdcp_ake_certificate.ekm, HDCP_2_2_E_KH_KM_LEN); + + return 0; +} + +/* Encrypt km */ +int tee_enc_rsaes_oaep(struct mtk_hdcp_info *hdcp_info, u8 *ekm) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + struct tci_t *tci_resp; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_ENC_KM; + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_ENC_KM); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + tci_resp = (struct tci_t *)dp_tee_priv->resp_buf; + memcpy(ekm, tci_resp->cmd_body.cmd_hdcp_enc_km.enc_km, HDCP_2_2_E_KPUB_KM_LEN); + + return 0; +} + +/* Calculate h prime and compare to rx_h */ +int tee_ake_h_prime(struct mtk_hdcp_info *hdcp_info, + u8 *rtx, u8 *rrx, u8 *rx_caps, u8 *tx_caps, u8 *rx_h, u32 rx_h_len) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + struct tci_t *tci_resp; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_AKE_H_PRIME; + tci->cmd_body.cmd_hdcp_ake_h_prime.rx_h_len = rx_h_len; + + memcpy(tci->cmd_body.cmd_hdcp_ake_h_prime.rtx, rtx, HDCP_2_2_RTX_LEN); + memcpy(tci->cmd_body.cmd_hdcp_ake_h_prime.rrx, rrx, HDCP_2_2_RRX_LEN); + memcpy(tci->cmd_body.cmd_hdcp_ake_h_prime.rx_caps, rx_caps, HDCP_2_2_RXCAPS_LEN); + memcpy(tci->cmd_body.cmd_hdcp_ake_h_prime.tx_caps, tx_caps, HDCP_2_2_TXCAPS_LEN); + memcpy(tci->cmd_body.cmd_hdcp_ake_h_prime.rx_h, rx_h, rx_h_len); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_AKE_H_PRIME); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + tci_resp = (struct tci_t *)dp_tee_priv->resp_buf; + + return tci_resp->return_code; +} + +/* Store paring info */ +int tee_ake_paring(struct mtk_hdcp_info *hdcp_info, u8 *rx_ekm) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_AKE_PARING; + memcpy(tci->cmd_body.cmd_hdcp_ake_paring.ekm, rx_ekm, HDCP_2_2_E_KH_KM_LEN); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_AKE_PARING); + if (rc) + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + + return 0; +} + +/* Calculate l prime and compare */ +int tee_lc_l_prime(struct mtk_hdcp_info *hdcp_info, u8 *rn, u8 *rx_l, u32 len) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + struct tci_t *tci_resp; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_LC_L_PRIME; + memcpy(tci->cmd_body.cmd_hdcp_lc_l_prime.rn, rn, HDCP_2_2_RN_LEN); + tci->cmd_body.cmd_hdcp_lc_l_prime.rx_l_len = len; + memcpy(tci->cmd_body.cmd_hdcp_lc_l_prime.rx_l, rx_l, len); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_LC_L_PRIME); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + tci_resp = (struct tci_t *)dp_tee_priv->resp_buf; + + return tci_resp->return_code; +} + +int tee_ske_enc_ks(struct mtk_hdcp_info *hdcp_info, u8 *riv, u8 *eks) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + u8 *share_buffer = NULL; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_SKE_CAL_EKS; + memcpy(tci->cmd_body.cmd_hdcp_ske_eks.riv, riv, HDCP_2_2_RIV_LEN); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH + 16, CMD_SKE_CAL_EKS); + if (rc) + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + + share_buffer = (u8 *)dp_tee_priv->resp_buf; + memcpy(eks, share_buffer + TCI_LENGTH, 16); + + return 0; +} + +/* Calculate and compare v prime for repeater */ +int tee_hdcp2_compute_compare_v(struct mtk_hdcp_info *hdcp_info, + u8 *crypto_param, u32 param_len, u8 *rx_v, u8 *tx_v) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + u8 *share_buffer = NULL; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_COMPARE_V2; + tci->cmd_body.cmd_hdcp_compare.rx_val_len = 16; + tci->cmd_body.cmd_hdcp_compare.param_len = param_len; + memcpy(tci->cmd_body.cmd_hdcp_compare.rx_val, rx_v, 16); + memcpy(tci->cmd_body.cmd_hdcp_compare.param, crypto_param, param_len); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_COMPARE_V2); + if (rc) { + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + return rc; + } + + share_buffer = (u8 *)dp_tee_priv->resp_buf; + memcpy(tx_v, share_buffer + TCI_LENGTH, 16); + + return 0; +} + +/* Calculate and compare m prime for repeater */ +int tee_hdcp2_compute_compare_m(struct mtk_hdcp_info *hdcp_info, + u8 *crypto_param, u32 param_len, u8 *rx_m) +{ + struct dp_tee_private *dp_tee_priv = hdcp_info->g_dp_tee_priv; + struct tci_t *tci = (struct tci_t *)dp_tee_priv->shm->kaddr; + int rc; + + /* Copy parameters */ + tci->command_id = CMD_COMPARE_M; + tci->cmd_body.cmd_hdcp_compare.rx_val_len = HDCP_2_2_MPRIME_LEN; + tci->cmd_body.cmd_hdcp_compare.param_len = param_len; + memcpy(tci->cmd_body.cmd_hdcp_compare.rx_val, rx_m, HDCP_2_2_MPRIME_LEN); + memcpy(tci->cmd_body.cmd_hdcp_compare.param, crypto_param, param_len); + + rc = dp_tee_op_send(dp_tee_priv, TCI_LENGTH, CMD_COMPARE_M); + if (rc) + pr_err("[TLC_HDCP] tee_op_send failed, error=%x\n", rc); + + return 0; +} diff --git a/drivers/gpu/drm/mediatek/tlc_dp_hdcp.h b/drivers/gpu/drm/mediatek/tlc_dp_hdcp.h new file mode 100644 index 000000000000..871d3fec5835 --- /dev/null +++ b/drivers/gpu/drm/mediatek/tlc_dp_hdcp.h @@ -0,0 +1,133 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2019-2024 MediaTek Inc. + */ + +#ifndef _TLC_DP_HDCP_H_ +#define _TLC_DP_HDCP_H_ + +#include <linux/printk.h> +#include <linux/tee_drv.h> +#include <linux/uuid.h> +#include <linux/types.h> +#include <linux/sched/clock.h> +#include <drm/display/drm_dp_helper.h> +#include "tci.h" + +/* HDCP version definitions */ +#define HDCP_NONE 0x0 /* No HDCP supported, no secure data path */ +#define HDCP_V1 0x1 /* HDCP version 1.0 */ +#define HDCP_V2 0x2 /* HDCP version 2.0 Type 1 */ +#define HDCP_V2_3 0x5 /* HDCP version 2.3 Type 1 */ + +/* Max buffer size supported by dp */ +#define MAX_COMMAND_SIZE 4096 +#define MAX_RESPONSE_SIZE MAX_COMMAND_SIZE + +#define HDCP1X_REP_MAXDEVS 128 +#define HDCP1X_V_LEN 20 +#define HDCP1X_B_INFO_LEN 2 + +#define HDCP2_K_LEN 2 +#define HDCP2_STREAMID_TYPE_LEN 2 + +enum hdcp_result { + AUTH_ZERO = 0, + AUTH_INIT = 2, + AUTH_PASS = 3, + AUTH_FAIL = 4, +}; + +struct dp_tee_private { + u32 session; + size_t resp_len; + u8 resp_buf[MAX_RESPONSE_SIZE]; + struct tee_context *ctx; + struct tee_shm *shm; +}; + +struct hdcp2_info_tx { + struct hdcp2_ake_init ake_init; + struct hdcp2_ake_no_stored_km no_stored_km; + struct hdcp2_ske_send_eks send_eks; + struct hdcp2_lc_init lc_init; + struct hdcp2_rep_stream_manage stream_manage; + struct hdcp2_rep_send_ack send_ack; + struct hdcp2_tx_caps tx_caps; + u8 k[HDCP2_K_LEN]; + u8 stream_id_type[HDCP2_STREAMID_TYPE_LEN]; +}; + +struct hdcp2_info_rx { + struct hdcp2_cert_rx cert_rx; + struct hdcp2_ake_send_cert send_cert; + struct hdcp2_rep_send_receiverid_list recvid_list; + struct hdcp2_ake_send_pairing_info pairing_info; + struct hdcp2_rep_stream_ready stream_ready; + struct hdcp2_ake_send_hprime send_hprime; + struct hdcp2_lc_send_lprime send_lprime; +}; + +struct hdcp1x_info { + bool capable; + bool repeater; + u8 device_count; + u8 v[HDCP1X_V_LEN]; + u8 b_ksv[DRM_HDCP_KSV_LEN]; + u8 a_ksv[DRM_HDCP_KSV_LEN]; + u8 b_info[HDCP1X_B_INFO_LEN]; + u8 ksvfifo[DRM_HDCP_KSV_LEN * (HDCP1X_REP_MAXDEVS - 1)]; +}; + +struct hdcp2_info { + bool capable; + bool repeater; + bool stored_km; + u8 device_count; + u8 stream_id_type; + u32 seq_num_v_cnt; + atomic_t cp_irq; + int cp_irq_cached; + wait_queue_head_t cp_irq_queue; + struct hdcp2_info_tx hdcp_tx; + struct hdcp2_info_rx hdcp_rx; + struct hdcp2_ake_stored_km ake_stored_km; +}; + +struct mtk_hdcp_info { + bool g_init; + u8 auth_status; + u8 auth_version; + u32 hdcp_content_type; + u32 content_protection; + struct hdcp2_info hdcp2_info; + struct hdcp1x_info hdcp1x_info; + struct dp_tee_private *g_dp_tee_priv; +}; + +int tee_add_device(struct mtk_hdcp_info *hdcp_info, u32 version); +void tee_remove_device(struct mtk_hdcp_info *hdcp_info); +int tee_clear_paring(struct mtk_hdcp_info *hdcp_info); +int tee_calculate_lm(struct mtk_hdcp_info *hdcp_info, u8 *bksv); +int tee_get_aksv(struct mtk_hdcp_info *hdcp_info, u8 *aksv); +int tee_compare_r0(struct mtk_hdcp_info *hdcp_info, u8 *r0, u32 len); +int tee_hdcp1x_compute_compare_v(struct mtk_hdcp_info *hdcp_info, + u8 *crypto_param, u32 param_len, u8 *rx_v); +int tee_hdcp1x_set_tx_an(struct mtk_hdcp_info *hdcp_info, u8 *an_code); +int tee_hdcp1x_soft_rst(struct mtk_hdcp_info *hdcp_info); +int tee_hdcp2_soft_rst(struct mtk_hdcp_info *hdcp_info); +int tee_hdcp_enable_encrypt(struct mtk_hdcp_info *hdcp_info, bool enable, u8 version); +int tee_ake_certificate(struct mtk_hdcp_info *hdcp_info, + u8 *certificate, bool *stored, u8 *out_m, u8 *out_ekm); +int tee_enc_rsaes_oaep(struct mtk_hdcp_info *hdcp_info, u8 *ekm); +int tee_ake_h_prime(struct mtk_hdcp_info *hdcp_info, + u8 *rtx, u8 *rrx, u8 *rx_caps, u8 *tx_caps, u8 *rx_h, u32 rx_h_len); +int tee_ake_paring(struct mtk_hdcp_info *hdcp_info, u8 *rx_ekm); +int tee_lc_l_prime(struct mtk_hdcp_info *hdcp_info, u8 *rn, u8 *rx_l, u32 len); + +int tee_ske_enc_ks(struct mtk_hdcp_info *hdcp_info, u8 *riv, u8 *eks); +int tee_hdcp2_compute_compare_v(struct mtk_hdcp_info *hdcp_info, + u8 *crypto_param, u32 param_len, u8 *rx_v, u8 *tx_v); +int tee_hdcp2_compute_compare_m(struct mtk_hdcp_info *hdcp_info, + u8 *crypto_param, u32 param_len, u8 *rx_m); +#endif /* _TLC_DP_HDCP_H_ */ -- 2.43.0
