>-----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: [PATCH v3 13/40] misc/mei/hdcp: Verify L_prime > >Request to ME to verify the LPrime received from HDCP sink. > >On Success, ME FW will verify the received Lprime by calculating and comparing >with L. > >This represents the completion of Locality Check. > >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 | 59 >++++++++++++++++++++++++++++++++++++++++ > include/linux/mei_hdcp.h | 8 ++++++ > 2 files changed, 67 insertions(+) > >diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c >b/drivers/misc/mei/hdcp/mei_hdcp.c >index 9bd7e66a91e4..ea84177311b7 100644 >--- a/drivers/misc/mei/hdcp/mei_hdcp.c >+++ b/drivers/misc/mei/hdcp/mei_hdcp.c >@@ -361,6 +361,65 @@ int mei_initiate_locality_check(struct mei_cl_device >*cldev, } EXPORT_SYMBOL(mei_initiate_locality_check); > >+/** >+ * mei_verify_lprime: >+ * Function to verify lprime. >+ * >+ * @cldev : Pointer for mei client device >+ * @data : Intel HW specific Data >+ * @rx_lprime : Pointer for LC_Send_L_prime >+ * >+ * Returns 0 on Success, <0 on Failure >+ */ >+int mei_verify_lprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, >+ struct hdcp2_lc_send_lprime *rx_lprime) { >+ struct wired_cmd_validate_locality_in verify_lprime_in = { { 0 } }; >+ struct wired_cmd_validate_locality_out verify_lprime_out = { { 0 } }; >+ struct device *dev; >+ ssize_t byte; >+ >+ if (!data || !rx_lprime) >+ return -EINVAL; >+ >+ dev = &cldev->dev; >+ >+ verify_lprime_in.header.api_version = HDCP_API_VERSION; >+ verify_lprime_in.header.command_id = WIRED_VALIDATE_LOCALITY; >+ verify_lprime_in.header.status = ME_HDCP_STATUS_SUCCESS; >+ verify_lprime_in.header.buffer_len = >+ > WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN; >+ >+ verify_lprime_in.port.integrated_port_type = data->port_type; >+ verify_lprime_in.port.physical_port = data->port; >+ >+ memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime, Validate rx_lprime->l_prime for NULL >+ sizeof(rx_lprime->l_prime)); >+ >+ byte = mei_cldev_send(cldev, (u8 *)&verify_lprime_in, >+ sizeof(verify_lprime_in)); >+ if (byte < 0) { >+ dev_dbg(dev, "mei_cldev_send failed. %d\n", (int)byte); >+ return byte; >+ } >+ >+ byte = mei_cldev_recv(cldev, (u8 *)&verify_lprime_out, >+ sizeof(verify_lprime_out)); >+ if (byte < 0) { >+ dev_dbg(dev, "mei_cldev_recv failed. %d\n", (int)byte); >+ return byte; >+ } >+ >+ if (verify_lprime_out.header.status != ME_HDCP_STATUS_SUCCESS) { >+ dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n", >+ WIRED_VALIDATE_LOCALITY, >+ verify_lprime_out.header.status); >+ return -1; >+ } Leave a blank line. >+ return 0; >+} >+EXPORT_SYMBOL(mei_verify_lprime); >+ > 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 >d9c4cac0b276..792143563c46 100644 >--- a/include/linux/mei_hdcp.h >+++ b/include/linux/mei_hdcp.h >@@ -124,6 +124,8 @@ int mei_store_pairing_info(struct mei_cl_device *cldev, >int mei_initiate_locality_check(struct mei_cl_device *cldev, > struct mei_hdcp_data *data, > 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); > #else > static int mei_cldev_register_notify(struct notifier_block *nb) { @@ -170,5 >+172,11 @@ int mei_initiate_locality_check(struct mei_cl_device *cldev, { > return -ENODEV; > } >+static inline >+int mei_verify_lprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, >+ struct hdcp2_lc_send_lprime *rx_lprime) { >+ 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 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
