>-----Original Message----- >From: Intel-gfx [mailto:intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of >Ramalingam C >Sent: Tuesday, April 3, 2018 7:27 PM >To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx; >seanpaul@xxxxxxxxxxxx; daniel@xxxxxxxx; chris@xxxxxxxxxxxxxxxxxx; >jani.nikula@xxxxxxxxxxxxxxx; Winkler, Tomas <tomas.winkler@xxxxxxxxx>; >Usyskin, Alexander <alexander.usyskin@xxxxxxxxx> >Cc: Vivi, Rodrigo <rodrigo.vivi@xxxxxxxxx> >Subject: [Intel-gfx] [PATCH v3 14/40] misc/mei/hdcp: Prepare Session Key > >Request to ME to prepare the encrypted session key. > >On Success, ME provides Encrypted session key. Functions populates the HDCP2.2 Drop "s" from function. >authentication msg SKE_Send_Eks. > >v2: > Rebased. >v3: > cldev is passed as first parameter [Tomas] > Redundant comments and cast are removed [Tomas] > >Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx> >--- > drivers/misc/mei/hdcp/mei_hdcp.c | 58 >++++++++++++++++++++++++++++++++++++++++ > include/linux/mei_hdcp.h | 8 ++++++ > 2 files changed, 66 insertions(+) > >diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c >b/drivers/misc/mei/hdcp/mei_hdcp.c >index ea84177311b7..abfcc57863b8 100644 >--- a/drivers/misc/mei/hdcp/mei_hdcp.c >+++ b/drivers/misc/mei/hdcp/mei_hdcp.c >@@ -420,6 +420,64 @@ int mei_verify_lprime(struct mei_cl_device *cldev, >struct mei_hdcp_data *data, } EXPORT_SYMBOL(mei_verify_lprime); > >+/** >+ * mei_get_session_key: >+ * Function to prepare SKE_Send_Eks. >+ * >+ * @cldev : Pointer for mei client device >+ * @data : Intel HW specific Data >+ * @ske_data : Pointer for SKE_Send_Eks. >+ * >+ * Returns 0 on Success, <0 on Failure >+ */ >+int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data >*data, >+ struct hdcp2_ske_send_eks *ske_data) { >+ struct wired_cmd_get_session_key_in get_skey_in = { { 0 } }; >+ struct wired_cmd_get_session_key_out get_skey_out = { { 0 } }; >+ struct device *dev; >+ ssize_t byte; >+ >+ if (!data || !ske_data) >+ return -EINVAL; >+ >+ dev = &cldev->dev; >+ >+ get_skey_in.header.api_version = HDCP_API_VERSION; >+ get_skey_in.header.command_id = WIRED_GET_SESSION_KEY; >+ get_skey_in.header.status = ME_HDCP_STATUS_SUCCESS; >+ get_skey_in.header.buffer_len = >WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN; >+ >+ get_skey_in.port.integrated_port_type = data->port_type; >+ get_skey_in.port.physical_port = data->port; >+ >+ byte = mei_cldev_send(cldev, (u8 *)&get_skey_in, sizeof(get_skey_in)); >+ if (byte < 0) { >+ dev_dbg(dev, "mei_cldev_send failed. %d\n", (int)byte); >+ return byte; >+ } >+ >+ byte = mei_cldev_recv(cldev, (u8 *)&get_skey_out, >+sizeof(get_skey_out)); >+ >+ if (byte < 0) { >+ dev_dbg(dev, "mei_cldev_recv failed. %d\n", (int)byte); >+ return byte; >+ } >+ >+ if (get_skey_out.header.status != ME_HDCP_STATUS_SUCCESS) { >+ dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n", >+ WIRED_GET_SESSION_KEY, >get_skey_out.header.status); >+ return -1; >+ } >+ >+ ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS; >+ memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks, Check for validity of ske_data->e_dkey_ks. >+ HDCP_2_2_E_DKEY_KS_LEN); >+ memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN); Again check for ske_data->riv. Also leave a blank line here. >+ return 0; >+} >+EXPORT_SYMBOL(mei_get_session_key); >+ > void mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool enabled) { > if (enabled) >diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index >792143563c46..534170d746af 100644 >--- a/include/linux/mei_hdcp.h >+++ b/include/linux/mei_hdcp.h >@@ -126,6 +126,8 @@ int mei_initiate_locality_check(struct mei_cl_device >*cldev, > struct hdcp2_lc_init *lc_init_data); int >mei_verify_lprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, > struct hdcp2_lc_send_lprime *rx_lprime); >+int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data >*data, >+ struct hdcp2_ske_send_eks *ske_data); > #else > static int mei_cldev_register_notify(struct notifier_block *nb) { @@ -178,5 >+180,11 @@ int mei_verify_lprime(struct mei_cl_device *cldev, struct >mei_hdcp_data *data, { > return -ENODEV; > } >+static inline >+int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data >*data, >+ struct hdcp2_ske_send_eks *ske_data) { >+ return -ENODEV; >+} > #endif /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined >(_LINUX_MEI_HDCP_H) */ >-- >2.7.4 > >_______________________________________________ >Intel-gfx mailing list >Intel-gfx@xxxxxxxxxxxxxxxxxxxxx >https://lists.freedesktop.org/mailman/listinfo/intel-gfx _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
