diff mbox series

[v10,28/40] misc/mei/hdcp: Store the HDCP Pairing info

Message ID 1548917996-28081-29-git-send-email-ramalingam.c@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915: Implement HDCP2.2 | expand

Commit Message

Ramalingam C Jan. 31, 2019, 6:59 a.m. UTC 
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.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 60 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 59 insertions(+), 1 deletion(-)

Comments

Shankar, Uma Feb. 4, 2019, 4:13 p.m. UTC | #1 
>-----Original Message-----
>From: dri-devel [mailto:dri-devel-bounces@lists.freedesktop.org] On Behalf Of
>Ramalingam C
>Sent: Thursday, January 31, 2019 12:30 PM
>To: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org;
>daniel.vetter@ffwll.ch; Winkler, Tomas <tomas.winkler@intel.com>; Shankar,
>Uma <uma.shankar@intel.com>
>Subject: [PATCH v10 28/40] 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.
>
>Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
>Reviewed-by: Uma Shankar <uma.shankar@intel.com>

Latest set looks ok. You can keep the RB.

>---
> drivers/misc/mei/hdcp/mei_hdcp.c | 60
>+++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 59 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
>b/drivers/misc/mei/hdcp/mei_hdcp.c
>index 74219e1487d3..e8396c723ab0 100644
>--- a/drivers/misc/mei/hdcp/mei_hdcp.c
>+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
>@@ -224,13 +224,71 @@ static int mei_verify_hprime(struct device *dev, struct
>hdcp_port_data *data,
> 	return 0;
> }
>
>+/**
>+ * mei_store_pairing_info() - Store pairing info received at ME FW
>+ * @dev: device corresponding to the mei_cl_device
>+ * @hdcp_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_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 =
>+(u8)GET_MEI_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 __attribute__((unused))
> struct i915_hdcp_component_ops mei_hdcp_ops = {
> 	.owner = THIS_MODULE,
> 	.initiate_hdcp2_session = mei_initiate_hdcp2_session,
> 	.verify_receiver_cert_prepare_km =
>mei_verify_receiver_cert_prepare_km,
> 	.verify_hprime = mei_verify_hprime,
>-	.store_pairing_info = NULL,
>+	.store_pairing_info = mei_store_pairing_info,
> 	.initiate_locality_check = NULL,
> 	.verify_lprime = NULL,
> 	.get_session_key = NULL,
>--
>2.7.4
>
>_______________________________________________
>dri-devel mailing list
>dri-devel@lists.freedesktop.org
>https://lists.freedesktop.org/mailman/listinfo/dri-devel
diff mbox series

Patch

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 74219e1487d3..e8396c723ab0 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -224,13 +224,71 @@  static int mei_verify_hprime(struct device *dev, struct hdcp_port_data *data,
 	return 0;
 }
 
+/**
+ * mei_store_pairing_info() - Store pairing info received at ME FW
+ * @dev: device corresponding to the mei_cl_device
+ * @hdcp_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_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 = (u8)GET_MEI_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 __attribute__((unused))
 struct i915_hdcp_component_ops mei_hdcp_ops = {
 	.owner = THIS_MODULE,
 	.initiate_hdcp2_session = mei_initiate_hdcp2_session,
 	.verify_receiver_cert_prepare_km = mei_verify_receiver_cert_prepare_km,
 	.verify_hprime = mei_verify_hprime,
-	.store_pairing_info = NULL,
+	.store_pairing_info = mei_store_pairing_info,
 	.initiate_locality_check = NULL,
 	.verify_lprime = NULL,
 	.get_session_key = NULL,