[PATCH 27/43] drm/i915: Wrappers for mei HDCP2.2 services

Ramalingam C
2018-02-14T14:20:50Z

Adds the wrapper for all mei hdcp2.2 service functions.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
drivers/gpu/drm/i915/intel_hdcp.c | 189 ++++++++++++++++++++++++++++++++++++++
1 file changed, 189 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 31e1af5b43ec..8ac824f0ed35 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -10,10 +10,14 @@
#include <drm/drm_hdcp.h>
#include <linux/i2c.h>
#include <linux/random.h>
+#include <uapi/linux/swab.h>
+#include <linux/mei_hdcp.h>

#include "intel_drv.h"
#include "i915_reg.h"

+#define GET_MEI_DDI_INDEX(port) (((port) == PORT_A) ? DDI_A : \
+ (enum physical_port) (port))
#define KEY_LOAD_TRIES 5

static int intel_hdcp_poll_ksv_fifo(struct intel_digital_port *intel_dig_port,
@@ -831,3 +835,188 @@ int intel_hdcp_check_link(struct intel_hdcp *hdcp)
mutex_unlock(&hdcp->hdcp_mutex);
return ret;
}
+
+static int
+hdcp2_prepare_ake_init(struct intel_hdcp *hdcp, struct hdcp2_ake_init *ake_data)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ if (data->port == INVALID_PORT && hdcp->connector->encoder)
+ data->port = GET_MEI_DDI_INDEX(hdcp->connector->encoder->port);
+
+ return mei_initiate_hdcp2_session(data, ake_data);
+}
+
+static int hdcp2_close_mei_session(struct intel_hdcp *hdcp)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+
+ if (!data->cldev || data->port == INVALID_PORT)
+ return -EINVAL;
+
+ return mei_close_hdcp_session(data);
+}
+
+static int
+hdcp2_verify_rx_cert_prepare_km(struct intel_hdcp *hdcp,
+ struct hdcp2_ake_send_cert *rx_cert,
+ bool *paired,
+ struct hdcp2_ake_no_stored_km *ek_pub_km,
+ size_t *msg_sz)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+ int ret;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ ret = mei_verify_receiver_cert_prepare_km(data, rx_cert, paired,
+ ek_pub_km, msg_sz);
+ if (ret < 0)
+ mei_close_hdcp_session(data);
+
+ return ret;
+}
+
+static int hdcp2_verify_hprime(struct intel_hdcp *hdcp,
+ struct hdcp2_ake_send_hprime *rx_hprime)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+ int ret;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ ret = mei_verify_hprime(data, rx_hprime);
+ if (ret < 0)
+ mei_close_hdcp_session(data);
+
+ return ret;
+}
+
+static int
+hdcp2_store_paring_info(struct intel_hdcp *hdcp,
+ struct hdcp2_ake_send_pairing_info *pairing_info)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+ int ret;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ ret = mei_store_pairing_info(data, pairing_info);
+ if (ret < 0)
+ mei_close_hdcp_session(data);
+
+ return ret;
+}
+
+static int
+hdcp2_prepare_lc_init(struct intel_hdcp *hdcp, struct hdcp2_lc_init *lc_init)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+ int ret;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ ret = mei_initiate_locality_check(data, lc_init);
+ if (ret < 0)
+ mei_close_hdcp_session(data);
+
+ return ret;
+}
+
+static int
+hdcp2_verify_lprime(struct intel_hdcp *hdcp,
+ struct hdcp2_lc_send_lprime *rx_lprime)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+ int ret;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ ret = mei_verify_lprime(data, rx_lprime);
+ if (ret < 0)
+ mei_close_hdcp_session(data);
+
+ return ret;
+}
+
+static int hdcp2_prepare_skey(struct intel_hdcp *hdcp,
+ struct hdcp2_ske_send_eks *ske_data)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+ int ret;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ ret = mei_get_session_key(data, ske_data);
+ if (ret < 0)
+ mei_close_hdcp_session(data);
+
+ return ret;
+}
+
+static int
+hdcp2_verify_rep_topology_prepare_ack(
+ struct intel_hdcp *hdcp,
+ struct hdcp2_rep_send_receiverid_list *rep_topology,
+ struct hdcp2_rep_send_ack *rep_send_ack)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+ int ret;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ ret = mei_repeater_check_flow_prepare_ack(data, rep_topology,
+ rep_send_ack);
+ if (ret < 0)
+ mei_close_hdcp_session(data);
+
+ return ret;
+}
+
+static int
+hdcp2_verify_mprime(struct intel_hdcp *hdcp,
+ struct hdcp2_rep_stream_ready *stream_ready)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+ int ret;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ ret = mei_verify_mprime(data, stream_ready);
+ if (ret < 0)
+ mei_close_hdcp_session(data);
+
+ return ret;
+}
+
+
+static int hdcp2_authenticate_port(struct intel_hdcp *hdcp)
+{
+ struct mei_hdcp_data *data = hdcp->mei_hdcp_data;
+ int ret;
+
+ if (!data->cldev)
+ return -EINVAL;
+
+ ret = mei_enable_hdcp_authentication(data);
+ if (ret < 0)
+ mei_close_hdcp_session(data);
+
+ return ret;
+}
+
+static inline int hdcp2_deauthenticate_port(struct intel_hdcp *hdcp)
+{
+ return hdcp2_close_mei_session(hdcp);
+}