AP: Extend Spatial Reuse Parameter Set

Extend SPR element to support following fields and pass all
information to kernel for driver use.
 * Non-SRG OBSS PD Max Offset
 * SRG BSS Color Bitmap
 * SRG Partial BSSID Bitmap

Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>

hostapd/config_file.c

@@ -1220,6 +1220,32 @@ static u8 set_he_cap(int val, u8 mask)
 	return (u8) (mask & (val << find_bit_offset(mask)));
 }
 
+
+static int hostapd_parse_he_srg_bitmap(u8 *bitmap, char *val)
+{
+	int bitpos;
+	char *pos, *end;
+
+	os_memset(bitmap, 0, 8);
+	pos = val;
+	while (*pos != '\0') {
+		end = os_strchr(pos, ' ');
+		if (end)
+			*end = '\0';
+
+		bitpos = atoi(pos);
+		if (bitpos < 0 || bitpos > 64)
+			return -1;
+
+		bitmap[bitpos / 8] |= BIT(bitpos % 8);
+		if (!end)
+			break;
+		pos = end + 1;
+	}
+
+	return 0;
+}
+
 #endif /* CONFIG_IEEE80211AX */
 
 
@@ -3554,13 +3580,29 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 		conf->he_mu_edca.he_mu_ac_vo_param[HE_MU_AC_PARAM_TIMER_IDX] =
 			atoi(pos) & 0xff;
 	} else if (os_strcmp(buf, "he_spr_sr_control") == 0) {
-		conf->spr.sr_control = atoi(pos) & 0xff;
+		conf->spr.sr_control = atoi(pos) & 0x1f;
 	} else if (os_strcmp(buf, "he_spr_non_srg_obss_pd_max_offset") == 0) {
 		conf->spr.non_srg_obss_pd_max_offset = atoi(pos);
 	} else if (os_strcmp(buf, "he_spr_srg_obss_pd_min_offset") == 0) {
 		conf->spr.srg_obss_pd_min_offset = atoi(pos);
 	} else if (os_strcmp(buf, "he_spr_srg_obss_pd_max_offset") == 0) {
 		conf->spr.srg_obss_pd_max_offset = atoi(pos);
+	} else if (os_strcmp(buf, "he_spr_srg_bss_colors") == 0) {
+		if (hostapd_parse_he_srg_bitmap(
+			conf->spr.srg_bss_color_bitmap, pos)) {
+			wpa_printf(MSG_ERROR,
+				   "Line %d: Invalid srg bss colors list '%s'",
+				   line, pos);
+			return 1;
+		}
+	} else if (os_strcmp(buf, "he_spr_srg_partial_bssid") == 0) {
+		if (hostapd_parse_he_srg_bitmap(
+			conf->spr.srg_partial_bssid_bitmap, pos)) {
+			wpa_printf(MSG_ERROR,
+				   "Line %d: Invalid srg partial bssid list '%s'",
+				   line, pos);
+			return 1;
+		}
 	} else if (os_strcmp(buf, "he_oper_chwidth") == 0) {
 		conf->he_oper_chwidth = atoi(pos);
 	} else if (os_strcmp(buf, "he_oper_centr_freq_seg0_idx") == 0) {

hostapd/hostapd.conf

@@ -881,7 +881,22 @@ wmm_ac_vo_acm=0
 #he_spr_non_srg_obss_pd_max_offset
 #he_spr_srg_obss_pd_min_offset
 #he_spr_srg_obss_pd_max_offset
-
+#
+# SPR SRG BSS Color
+# This config represents SRG BSS Color Bitmap field of Spatial Reuse Parameter
+# Set element that indicates the BSS color values used by members of the
+# SRG of which the transmitting STA is a member. The value is in range of 0-63.
+#he_spr_srg_bss_colors=1 2 10 63
+#
+# SPR SRG Partial BSSID
+# This config represents SRG Partial BSSID Bitmap field of Spatial Reuse
+# Parameter Set element that indicates the Partial BSSID values used by members
+# of the SRG of which the transmitting STA is a member. The value range
+# corresponds to one of the 64 possible values of BSSID[39:44], where the lowest
+# numbered bit corresponds to Partial BSSID value 0 and the highest numbered bit
+# corresponds to Partial BSSID value 63.
+#he_spr_srg_partial_bssid=0 1 3 63
+#
 #he_6ghz_max_mpdu: Maximum MPDU Length of HE 6 GHz band capabilities.
 # Indicates maximum MPDU length
 # 0 = 3895 octets

src/ap/ap_config.h

@@ -908,8 +908,8 @@ struct spatial_reuse {
 	u8 non_srg_obss_pd_max_offset;
 	u8 srg_obss_pd_min_offset;
 	u8 srg_obss_pd_max_offset;
-	u8 srg_obss_color_bitmap;
-	u8 srg_obss_color_partial_bitmap;
+	u8 srg_bss_color_bitmap[8];
+	u8 srg_partial_bssid_bitmap[8];
 };
 
 /**

src/ap/beacon.c

@@ -1497,11 +1497,17 @@ int ieee802_11_set_beacon(struct hostapd_data *hapd)
 	params.assocresp_ies = assocresp;
 	params.reenable = hapd->reenable_beacon;
 #ifdef CONFIG_IEEE80211AX
-	params.he_spr = !!hapd->iface->conf->spr.sr_control;
+	params.he_spr_ctrl = hapd->iface->conf->spr.sr_control;
+	params.he_spr_non_srg_obss_pd_max_offset =
+		hapd->iface->conf->spr.non_srg_obss_pd_max_offset;
 	params.he_spr_srg_obss_pd_min_offset =
 		hapd->iface->conf->spr.srg_obss_pd_min_offset;
 	params.he_spr_srg_obss_pd_max_offset =
 		hapd->iface->conf->spr.srg_obss_pd_max_offset;
+	os_memcpy(params.he_spr_bss_color_bitmap,
+		  hapd->iface->conf->spr.srg_bss_color_bitmap, 8);
+	os_memcpy(params.he_spr_partial_bssid_bitmap,
+		  hapd->iface->conf->spr.srg_partial_bssid_bitmap, 8);
 	params.he_bss_color_disabled =
 		hapd->iface->conf->he_op.he_bss_color_disabled;
 	params.he_bss_color_partial =

src/ap/ieee802_11_he.c

@@ -304,6 +304,11 @@ u8 * hostapd_eid_spatial_reuse(struct hostapd_data *hapd, u8 *eid)
 	if (spr->sr_ctrl & SPATIAL_REUSE_SRG_INFORMATION_PRESENT) {
 		*spr_param++ = hapd->iface->conf->spr.srg_obss_pd_min_offset;
 		*spr_param++ = hapd->iface->conf->spr.srg_obss_pd_max_offset;
+		os_memcpy(spr_param,
+			  hapd->iface->conf->spr.srg_bss_color_bitmap, 8);
+		spr_param += 8;
+		os_memcpy(spr_param,
+			  hapd->iface->conf->spr.srg_partial_bssid_bitmap, 8);
 		pos += 18;
 	}
 

src/drivers/driver.h

@@ -1483,19 +1483,36 @@ struct wpa_driver_ap_params {
 	const struct wpabuf *civic;
 
 	/**
-	 * he_spr - Whether Spatial Reuse is enabled
+	 * he_spr_ctrl - Spatial Reuse control field of SPR element
 	 */
-	 int he_spr;
+	u8 he_spr_ctrl;
+
+	/**
+	 * he_spr_non_srg_obss_pd_max_offset - Non-SRG Maximum TX power offset
+	 */
+	u8 he_spr_non_srg_obss_pd_max_offset;
 
 	/**
 	 * he_spr_srg_obss_pd_min_offset - Minimum TX power offset
 	 */
-	 int he_spr_srg_obss_pd_min_offset;
+	u8 he_spr_srg_obss_pd_min_offset;
 
 	/**
 	 * he_spr_srg_obss_pd_max_offset - Maximum TX power offset
 	 */
-	 int he_spr_srg_obss_pd_max_offset;
+	u8 he_spr_srg_obss_pd_max_offset;
+
+	/**
+	 * he_spr_bss_color_bitmap - BSS color values used by members of the
+	 * SRG.
+	 */
+	u8 he_spr_bss_color_bitmap[8];
+
+	/**
+	 * he_spr_partial_bssid_bitmap - Partial BSSID values used by members
+	 * of the SRG.
+	 */
+	u8 he_spr_partial_bssid_bitmap[8];
 
 	/**
 	 * he_bss_color - Whether the BSS Color is disabled

src/drivers/driver_nl80211.c

@@ -4606,17 +4606,34 @@ static int wpa_driver_nl80211_set_ap(void *priv,
 	}
 
 #ifdef CONFIG_IEEE80211AX
-	if (params->he_spr) {
+	if (params->he_spr_ctrl) {
 		struct nlattr *spr;
 
 		spr = nla_nest_start(msg, NL80211_ATTR_HE_OBSS_PD);
-		wpa_printf(MSG_DEBUG, "nl80211: he_spr=%d", params->he_spr);
+		wpa_printf(MSG_DEBUG, "nl80211: he_spr_ctrl=0x%x",
+			   params->he_spr_ctrl);
 
 		if (!spr ||
-		    nla_put_u8(msg, NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET,
-			       params->he_spr_srg_obss_pd_min_offset) ||
-		    nla_put_u8(msg, NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET,
-			       params->he_spr_srg_obss_pd_max_offset))
+		    nla_put_u8(msg, NL80211_HE_OBSS_PD_ATTR_SR_CTRL,
+			       params->he_spr_ctrl) ||
+		    ((params->he_spr_ctrl &
+		      SPATIAL_REUSE_NON_SRG_OFFSET_PRESENT) &&
+		     nla_put_u8(msg, NL80211_HE_OBSS_PD_ATTR_NON_SRG_MAX_OFFSET,
+				params->he_spr_non_srg_obss_pd_max_offset)))
+			goto fail;
+
+		if ((params->he_spr_ctrl &
+		     SPATIAL_REUSE_SRG_INFORMATION_PRESENT) &&
+		    (nla_put_u8(msg, NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET,
+				params->he_spr_srg_obss_pd_min_offset) ||
+		     nla_put_u8(msg, NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET,
+				params->he_spr_srg_obss_pd_max_offset) ||
+		     nla_put(msg, NL80211_HE_OBSS_PD_ATTR_BSS_COLOR_BITMAP,
+			     sizeof(params->he_spr_bss_color_bitmap),
+			     params->he_spr_bss_color_bitmap) ||
+		     nla_put(msg, NL80211_HE_OBSS_PD_ATTR_PARTIAL_BSSID_BITMAP,
+			     sizeof(params->he_spr_partial_bssid_bitmap),
+			     params->he_spr_partial_bssid_bitmap)))
 			goto fail;
 
 		nla_nest_end(msg, spr);