1 files changed, 53 insertions, 0 deletions

diff --git a/include/linux/uwb/spec.h b/include/linux/uwb/spec.h
index 198c15f8e251..b52e44f1bd33 100644
--- a/include/linux/uwb/spec.h
+++ b/include/linux/uwb/spec.h
@@ -59,6 +59,11 @@ enum { UWB_NUM_ZONES = 16 };
 #define UWB_MAS_PER_ZONE (UWB_NUM_MAS / UWB_NUM_ZONES)
 
 /*
+ * Number of MAS required before a row can be considered available.
+ */
+#define UWB_USABLE_MAS_PER_ROW (UWB_NUM_ZONES - 1)
+
+/*
  * Number of streams per DRP reservation between a pair of devices.
  *
  * [ECMA-368] section 16.8.6.
@@ -94,6 +99,26 @@ enum { UWB_BEACON_SLOT_LENGTH_US = 85 };
 enum { UWB_MAX_LOST_BEACONS = 3 };
 
 /*
+ * mDRPBackOffWinMin
+ *
+ * The minimum number of superframes to wait before trying to reserve
+ * extra MAS.
+ *
+ * [ECMA-368] section 17.16
+ */
+enum { UWB_DRP_BACKOFF_WIN_MIN = 2 };
+
+/*
+ * mDRPBackOffWinMax
+ *
+ * The maximum number of superframes to wait before trying to reserve
+ * extra MAS.
+ *
+ * [ECMA-368] section 17.16
+ */
+enum { UWB_DRP_BACKOFF_WIN_MAX = 16 };
+
+/*
  * Length of a superframe in microseconds.
  */
 #define UWB_SUPERFRAME_LENGTH_US (UWB_MAS_LENGTH_US * UWB_NUM_MAS)
@@ -200,6 +225,12 @@ enum uwb_drp_reason {
         UWB_DRP_REASON_MODIFIED,
 };
 
+/** Relinquish Request Reason Codes ([ECMA-368] table 113) */
+enum uwb_relinquish_req_reason {
+        UWB_RELINQUISH_REQ_REASON_NON_SPECIFIC = 0,
+        UWB_RELINQUISH_REQ_REASON_OVER_ALLOCATION,
+};
+
 /**
  *  DRP Notification Reason Codes (WHCI 0.95 [3.1.4.9])
  */
@@ -252,6 +283,7 @@ enum uwb_ie {
         UWB_APP_SPEC_PROBE_IE = 15,
         UWB_IDENTIFICATION_IE = 19,
         UWB_MASTER_KEY_ID_IE = 20,
+        UWB_RELINQUISH_REQUEST_IE = 21,
         UWB_IE_WLP = 250, /* WiMedia Logical Link Control Protocol WLP 0.99 */
         UWB_APP_SPEC_IE = 255,
 };
@@ -365,6 +397,27 @@ struct uwb_ie_drp_avail {
         DECLARE_BITMAP(bmp, UWB_NUM_MAS);
 } __attribute__((packed));
 
+/* Relinqish Request IE ([ECMA-368] section 16.8.19). */
+struct uwb_relinquish_request_ie {
+        struct uwb_ie_hdr       hdr;
+        __le16                  relinquish_req_control;
+        struct uwb_dev_addr     dev_addr;
+        struct uwb_drp_alloc    allocs[];
+} __attribute__((packed));
+
+static inline int uwb_ie_relinquish_req_reason_code(struct uwb_relinquish_request_ie *ie)
+{
+        return (le16_to_cpu(ie->relinquish_req_control) >> 0) & 0xf;
+}
+
+static inline void uwb_ie_relinquish_req_set_reason_code(struct uwb_relinquish_request_ie *ie,
+                                                         int reason_code)
+{
+        u16 ctrl = le16_to_cpu(ie->relinquish_req_control);
+        ctrl = (ctrl & ~(0xf << 0)) | (reason_code << 0);
+        ie->relinquish_req_control = cpu_to_le16(ctrl);
+}
+
 /**
  * The Vendor ID is set to an OUI that indicates the vendor of the device.
  * ECMA-368 [16.8.10]