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authorRamalingam C <ramalingam.c@intel.com>2019-02-21 23:42:01 +0530
committerDaniel Vetter <daniel.vetter@ffwll.ch>2019-02-25 17:02:14 +0100
commit6a1a00a30e3a41c8e9a9fc78a6153608f326114d (patch)
tree7accebed7c3da29314f56905fe83877bf920a513 /drivers/misc/mei
parenta7dcbed2bb041af83ca2f372b1403efe9f5f844e (diff)
misc/mei/hdcp: Store the HDCP Pairing info
Provides Pairing info to ME to store. Pairing is a process to fast track the subsequent authentication with the same HDCP sink. On Success, received HDCP pairing info is stored in non-volatile memory of ME. v2: Rebased. v3: cldev is passed as first parameter [Tomas] Redundant comments and cast are removed [Tomas] v4: %zd for ssize_t [Alexander] %s/return -1/return -EIO [Alexander] Style fixed [Uma] v5: Rebased. v6: Collected the Rb-ed by. Rebasing. v7: Adjust to the new mei interface. Fix for Kdoc. v8: K-Doc addition. [Tomas] memcpy for const length. v9: renamed func as mei_hdcp_* [Tomas] Inline function is defined for DDI index [Tomas] v10: K-Doc fix. [Tomas] v11: Rebased. Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Acked-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1550772730-23280-8-git-send-email-ramalingam.c@intel.com
Diffstat (limited to 'drivers/misc/mei')
-rw-r--r--drivers/misc/mei/hdcp/mei_hdcp.c60
1 files changed, 59 insertions, 1 deletions
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 37e854d7240e..d5fbb2dbba60 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -238,6 +238,64 @@ mei_hdcp_verify_hprime(struct device *dev, struct hdcp_port_data *data,
return 0;
}
+/**
+ * mei_hdcp_store_pairing_info() - Store pairing info received at ME FW
+ * @dev: device corresponding to the mei_cl_device
+ * @data: Intel HW specific hdcp data
+ * @pairing_info: AKE_Send_Pairing_Info msg input to ME FW
+ *
+ * Return: 0 on Success, <0 on Failure
+ */
+static int
+mei_hdcp_store_pairing_info(struct device *dev, struct hdcp_port_data *data,
+ struct hdcp2_ake_send_pairing_info *pairing_info)
+{
+ struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } };
+ struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } };
+ struct mei_cl_device *cldev;
+ ssize_t byte;
+
+ if (!dev || !data || !pairing_info)
+ return -EINVAL;
+
+ cldev = to_mei_cl_device(dev);
+
+ pairing_info_in.header.api_version = HDCP_API_VERSION;
+ pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO;
+ pairing_info_in.header.status = ME_HDCP_STATUS_SUCCESS;
+ pairing_info_in.header.buffer_len =
+ WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN;
+
+ pairing_info_in.port.integrated_port_type = data->port_type;
+ pairing_info_in.port.physical_port = mei_get_ddi_index(data->port);
+
+ memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km,
+ HDCP_2_2_E_KH_KM_LEN);
+
+ byte = mei_cldev_send(cldev, (u8 *)&pairing_info_in,
+ sizeof(pairing_info_in));
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+ return byte;
+ }
+
+ byte = mei_cldev_recv(cldev, (u8 *)&pairing_info_out,
+ sizeof(pairing_info_out));
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+ return byte;
+ }
+
+ if (pairing_info_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+ dev_dbg(dev, "ME cmd 0x%08X failed. Status: 0x%X\n",
+ WIRED_AKE_SEND_PAIRING_INFO,
+ pairing_info_out.header.status);
+ return -EIO;
+ }
+
+ return 0;
+}
+
static const __attribute__((unused))
struct i915_hdcp_component_ops mei_hdcp_ops = {
.owner = THIS_MODULE,
@@ -245,7 +303,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
.verify_receiver_cert_prepare_km =
mei_hdcp_verify_receiver_cert_prepare_km,
.verify_hprime = mei_hdcp_verify_hprime,
- .store_pairing_info = NULL,
+ .store_pairing_info = mei_hdcp_store_pairing_info,
.initiate_locality_check = NULL,
.verify_lprime = NULL,
.get_session_key = NULL,