Daniele
+ }
+
+ return ret;
+}
+
int intel_hdcp_gsc_init(struct xe_device *xe)
{
- drm_dbg_kms(&xe->drm, "HDCP support not yet implemented\n");
- return -ENODEV;
+ struct i915_hdcp_arbiter *data;
+ int ret;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ mutex_lock(&xe->display.hdcp.hdcp_mutex);
+ xe->display.hdcp.arbiter = data;
+ xe->display.hdcp.arbiter->hdcp_dev = xe->drm.dev;
+ xe->display.hdcp.arbiter->ops = &gsc_hdcp_ops;
+ ret = intel_hdcp_gsc_hdcp2_init(xe);
+ if (ret)
+ kfree(data);
+
+ mutex_unlock(&xe->display.hdcp.hdcp_mutex);
+
+ return ret;
}
void intel_hdcp_gsc_fini(struct xe_device *xe)
{
+ struct intel_hdcp_gsc_message *hdcp_message =
+ xe->display.hdcp.hdcp_message;
+
+ if (!hdcp_message)
+ return;
+
+ xe_bo_unpin_map_no_vm(hdcp_message->hdcp_bo);
+ kfree(hdcp_message);
+}
+
+static int xe_gsc_send_sync(struct xe_device *xe,
+ struct intel_hdcp_gsc_message *hdcp_message,
+ u32 msg_size_in, u32 msg_size_out,
+ u32 addr_out_off)
+{
+ struct xe_gt *gt = hdcp_message->hdcp_bo->tile->media_gt;
+ struct iosys_map *map = &hdcp_message->hdcp_bo->vmap;
+ struct xe_gsc *gsc = >->uc.gsc;
+ int ret;
+
+ ret = xe_gsc_pkt_submit_kernel(gsc, hdcp_message->hdcp_cmd_in,
msg_size_in,
+ hdcp_message->hdcp_cmd_out,
msg_size_out);
+ if (ret) {
+ drm_err(&xe->drm, "failed to send gsc HDCP msg (%d)\n",
ret);
+ return ret;
+ }
+
+ if (xe_gsc_check_and_update_pending(xe, map, 0, map,
addr_out_off))
+ return -EAGAIN;
+
+ ret = xe_gsc_read_out_header(xe, map, addr_out_off,
+ sizeof(struct hdcp_cmd_header), NULL);
+
+ return ret;
}
ssize_t intel_hdcp_gsc_msg_send(struct xe_device *xe, u8 *msg_in,
size_t msg_in_len, u8 *msg_out,
size_t msg_out_len)
{
- return -ENODEV;
+ const size_t max_msg_size = PAGE_SIZE - HDCP_GSC_HEADER_SIZE;
+ struct intel_hdcp_gsc_message *hdcp_message;
+ u64 host_session_id;
+ u32 msg_size_in, msg_size_out;
+ u32 addr_out_off, addr_in_wr_off = 0;
+ int ret, tries = 0;
+
+ if (msg_in_len > max_msg_size || msg_out_len > max_msg_size) {
+ ret = -ENOSPC;
+ goto out;
+ }
+
+ msg_size_in = msg_in_len + HDCP_GSC_HEADER_SIZE;
+ msg_size_out = msg_out_len + HDCP_GSC_HEADER_SIZE;
+ hdcp_message = xe->display.hdcp.hdcp_message;
+ addr_out_off = PAGE_SIZE;
+
+ host_session_id = xe_gsc_create_host_session_id();
+ xe_device_mem_access_get(xe);
+ addr_in_wr_off = xe_gsc_emit_header(xe, &hdcp_message-
hdcp_bo->vmap,
+ addr_in_wr_off,
HECI_MEADDRESS_HDCP,
+ host_session_id, msg_in_len);
+ xe_map_memcpy_to(xe, &hdcp_message->hdcp_bo->vmap,
addr_in_wr_off,
+ msg_in, msg_in_len);
+ /*
+ * Keep sending request in case the pending bit is set no need to add
+ * message handle as we are using same address hence loc. of header
is
+ * same and it will contain the message handle. we will send the
message
+ * 20 times each message 50 ms apart
+ */
+ do {
+ ret = xe_gsc_send_sync(xe, hdcp_message, msg_size_in,
msg_size_out,
+ addr_out_off);
+
+ /* Only try again if gsc says so */
+ if (ret != -EAGAIN)
+ break;
+
+ msleep(50);
+
+ } while (++tries < 20);
+
+ if (ret)
+ goto out;
+
+ xe_map_memcpy_from(xe, msg_out, &hdcp_message->hdcp_bo-
vmap,
+ addr_out_off + HDCP_GSC_HEADER_SIZE,
+ msg_out_len);
+
+out:
+ xe_device_mem_access_put(xe);
+ return ret;
}
diff --git a/drivers/gpu/drm/xe/xe_gsc_submit.c
b/drivers/gpu/drm/xe/xe_gsc_submit.c
index 348994b271be..9a18f5667db3 100644
--- a/drivers/gpu/drm/xe/xe_gsc_submit.c
+++ b/drivers/gpu/drm/xe/xe_gsc_submit.c
@@ -40,6 +40,21 @@ gsc_to_gt(struct xe_gsc *gsc)
return container_of(gsc, struct xe_gt, uc.gsc);
}
+/**
+ * xe_gsc_get_host_session_id - Creates a random 64 bit host_session
+id with
+ * bits 56-63 masked.
+ *
+ * Returns: random host_session_id which can be used to send messages
+to gsc cs */
+u64 xe_gsc_create_host_session_id(void)
+{
+ u64 host_session_id;
+
+ get_random_bytes(&host_session_id, sizeof(u64));
+ host_session_id &= ~HOST_SESSION_CLIENT_MASK;
+ return host_session_id;
+}
+
/**
* xe_gsc_emit_header - write the MTL GSC header in memory
* @xe: the Xe device
diff --git a/drivers/gpu/drm/xe/xe_gsc_submit.h
b/drivers/gpu/drm/xe/xe_gsc_submit.h
index 1939855031a6..1416b5745a4c 100644
--- a/drivers/gpu/drm/xe/xe_gsc_submit.h
+++ b/drivers/gpu/drm/xe/xe_gsc_submit.h
@@ -28,4 +28,5 @@ int xe_gsc_read_out_header(struct xe_device *xe,
int xe_gsc_pkt_submit_kernel(struct xe_gsc *gsc, u64 addr_in, u32 size_in,
u64 addr_out, u32 size_out);
+u64 xe_gsc_create_host_session_id(void);
#endif
