>-----Original Message-----
>From: Intel-gfx [mailto:intel-gfx-boun...@lists.freedesktop.org] On Behalf Of
>Ramalingam C
>Sent: Tuesday, April 3, 2018 7:27 PM
>To: intel-gfx@lists.freedesktop.org; dri-de...@lists.freedesktop.org;
>seanp...@chromium.org; dan...@ffwll.ch; ch...@chris-wilson.co.uk;
>jani.nik...@linux.intel.com; Winkler, Tomas <tomas.wink...@intel.com>;
>Usyskin, Alexander <alexander.usys...@intel.com>
>Cc: Vivi, Rodrigo <rodrigo.v...@intel.com>
>Subject: [Intel-gfx] [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 <ramalinga...@intel.com>
>---
> 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
>
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