From patchwork Wed Feb 25 22:17:14 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Oh X-Patchwork-Id: 5884811 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: X-Original-To: patchwork-linux-wireless@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7A74F9F373 for ; Wed, 25 Feb 2015 22:17:50 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6DAEC2027D for ; Wed, 25 Feb 2015 22:17:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0EDCE20268 for ; Wed, 25 Feb 2015 22:17:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753077AbbBYWRq (ORCPT ); Wed, 25 Feb 2015 17:17:46 -0500 Received: from wolverine02.qualcomm.com ([199.106.114.251]:12118 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752649AbbBYWRp (ORCPT ); Wed, 25 Feb 2015 17:17:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=qca.qualcomm.com; i=@qca.qualcomm.com; q=dns/txt; s=qcdkim; t=1424902665; x=1456438665; h=from:to:cc:subject:date:message-id:mime-version; bh=Pov74xR5XchBEFYdqbxgUVno9O4J53hF9/mj31KFjp4=; b=apV+AOuU6XJIfirkyldOn5kcN46vnxxbYYJ1hUVD6+nyHO33an+Ecj2w z4Xb/NoEsypx0oYaJFvT7mbdVJmZ7aMIpep1w4ZRidbC/9+D/AICUpAaF zCFIokloanCnfT+YllVQC/y7uIbKTUw8/AnO70wnrswPsO+qHCl5E8Boc M=; X-IronPort-AV: E=McAfee;i="5600,1067,7723"; a="197159714" Received: from ironmsg04-l.qualcomm.com ([172.30.48.19]) by wolverine02.qualcomm.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 25 Feb 2015 14:17:44 -0800 X-IronPort-AV: E=Sophos;i="5.09,647,1418112000"; d="scan'208";a="822961771" Received: from nasanexm01b.na.qualcomm.com ([10.85.0.82]) by Ironmsg04-L.qualcomm.com with ESMTP/TLS/RC4-SHA; 25 Feb 2015 14:17:43 -0800 Received: from poh-linux2.qualcomm.com (10.80.80.8) by NASANEXM01B.na.qualcomm.com (10.85.0.82) with Microsoft SMTP Server (TLS) id 15.0.995.29; Wed, 25 Feb 2015 14:17:43 -0800 From: Peter Oh To: CC: Subject: [PATCH] ath: support new FCC DFS Radar Type 1 Date: Wed, 25 Feb 2015 14:17:14 -0800 Message-ID: <1424902634-18275-1-git-send-email-poh@qca.qualcomm.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: NASANEXM01F.na.qualcomm.com (10.85.0.32) To NASANEXM01B.na.qualcomm.com (10.85.0.82) Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID,T_RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add support for new FCC DFS rules released on August 14, 2014. FCC has added a new radar type named Radar Type 1 and original Radar Type 1 is renamed to Radar Type 0 in consequence. In fact, the type ID does nothing to functionalities. In other words, even if we re-order the IDs, DFS detection will work as well, but we give the ID with matching to FCC doc. By adding this support, the drivers using this DFS function are able to support both of old and new FCC DFS rules simultaneously without any other changes. Signed-off-by: Peter Oh --- drivers/net/wireless/ath/dfs_pattern_detector.c | 23 ++++++++++---------- drivers/net/wireless/ath/dfs_pattern_detector.h | 5 +++++ drivers/net/wireless/ath/dfs_pri_detector.c | 29 ++++++++++++++++++++++--- drivers/net/wireless/ath/dfs_pri_detector.h | 4 ++-- 4 files changed, 44 insertions(+), 17 deletions(-) diff --git a/drivers/net/wireless/ath/dfs_pattern_detector.c b/drivers/net/wireless/ath/dfs_pattern_detector.c index b1de8c6..65958ec 100644 --- a/drivers/net/wireless/ath/dfs_pattern_detector.c +++ b/drivers/net/wireless/ath/dfs_pattern_detector.c @@ -21,12 +21,6 @@ #include "dfs_pri_detector.h" #include "ath.h" -/* - * tolerated deviation of radar time stamp in usecs on both sides - * TODO: this might need to be HW-dependent - */ -#define PRI_TOLERANCE 16 - /** * struct radar_types - contains array of patterns defined for one DFS domain * @domain: DFS regulatory domain @@ -81,13 +75,18 @@ static const struct radar_types etsi_radar_types_v15 = { PPB_THRESH(PPB), PRI_TOLERANCE, CHIRP \ } +/* radar types released on August 14, 2014 + * type 1 PRI values randomly selected within the range of PMIN and PMAX, + * hence leave its PPB as 0 to be calculated on the fly. + */ static const struct radar_detector_specs fcc_radar_ref_types[] = { FCC_PATTERN(0, 0, 1, 1428, 1428, 1, 18, false), - FCC_PATTERN(1, 0, 5, 150, 230, 1, 23, false), - FCC_PATTERN(2, 6, 10, 200, 500, 1, 16, false), - FCC_PATTERN(3, 11, 20, 200, 500, 1, 12, false), - FCC_PATTERN(4, 50, 100, 1000, 2000, 1, 1, true), - FCC_PATTERN(5, 0, 1, 333, 333, 1, 9, false), + FCC_PATTERN(1, 0, 1, 518, 3066, 1, 0, false), + FCC_PATTERN(2, 0, 5, 150, 230, 1, 23, false), + FCC_PATTERN(3, 6, 10, 200, 500, 1, 16, false), + FCC_PATTERN(4, 11, 20, 200, 500, 1, 12, false), + FCC_PATTERN(5, 50, 100, 1000, 2000, 1, 1, true), + FCC_PATTERN(6, 0, 1, 333, 333, 1, 9, false), }; static const struct radar_types fcc_radar_types = { @@ -199,7 +198,7 @@ channel_detector_create(struct dfs_pattern_detector *dpd, u16 freq) goto fail; for (i = 0; i < dpd->num_radar_types; i++) { - const struct radar_detector_specs *rs = &dpd->radar_spec[i]; + struct radar_detector_specs *rs = &dpd->radar_spec[i]; struct pri_detector *de = pri_detector_init(rs); if (de == NULL) goto fail; diff --git a/drivers/net/wireless/ath/dfs_pattern_detector.h b/drivers/net/wireless/ath/dfs_pattern_detector.h index 25a43d6..92be353 100644 --- a/drivers/net/wireless/ath/dfs_pattern_detector.h +++ b/drivers/net/wireless/ath/dfs_pattern_detector.h @@ -21,6 +21,11 @@ #include #include +/* tolerated deviation of radar time stamp in usecs on both sides + * TODO: this might need to be HW-dependent + */ +#define PRI_TOLERANCE 16 + /** * struct ath_dfs_pool_stats - DFS Statistics for global pools */ diff --git a/drivers/net/wireless/ath/dfs_pri_detector.c b/drivers/net/wireless/ath/dfs_pri_detector.c index 1b5ad19..a234329 100644 --- a/drivers/net/wireless/ath/dfs_pri_detector.c +++ b/drivers/net/wireless/ath/dfs_pri_detector.c @@ -21,6 +21,13 @@ #include "dfs_pattern_detector.h" #include "dfs_pri_detector.h" +#define FCC_TYPE1_MIN_PRI (518) +#define FCC_TYPE1_MAX_PRI (3066) +#define FCC_TYPE1_MIN_PPB (18) +#define FCC_TYPE1_MAX_PPB (106) +/* round up of ((1 / 360) * (19 * 1M)) */ +#define FCC_TYPE1_PPB_CONSTANT (52778) + struct ath_dfs_pool_stats global_dfs_pool_stats = {}; #define DFS_POOL_STAT_INC(c) (global_dfs_pool_stats.c++) @@ -244,6 +251,13 @@ static bool pseq_handler_create_sequences(struct pri_detector *pde, ps.first_ts = p->ts; ps.last_ts = ts; ps.pri = ts - p->ts; + if (pde->rs->ppb == 0) { + /* runtime calculation of ppb and ppb threshold for + * pri in variable range. ppb threshold is half of ppb. + */ + pde->rs->ppb = FCC_TYPE1_PPB_CONSTANT / ps.pri; + pde->rs->ppb_thresh = (pde->rs->ppb / 2) + 1; + } ps.dur = ps.pri * (pde->rs->ppb - 1) + 2 * pde->rs->max_pri_tolerance; @@ -366,6 +380,14 @@ static void pri_detector_reset(struct pri_detector *pde, u64 ts) } pde->count = 0; pde->last_ts = ts; + /* reset FCC type 1 ppb and threshold to be calculated again */ + if (pde->rs->type_id == 1) { + if ((pde->rs->pri_min == FCC_TYPE1_MIN_PRI - PRI_TOLERANCE) && + (pde->rs->pri_max == FCC_TYPE1_MAX_PRI + PRI_TOLERANCE)) { + pde->rs->ppb = 0; + pde->rs->ppb_thresh = 0; + } + } } static void pri_detector_exit(struct pri_detector *de) @@ -411,7 +433,7 @@ static struct pri_sequence *pri_detector_add_pulse(struct pri_detector *de, return ps; } -struct pri_detector *pri_detector_init(const struct radar_detector_specs *rs) +struct pri_detector *pri_detector_init(struct radar_detector_specs *rs) { struct pri_detector *de; @@ -424,8 +446,9 @@ struct pri_detector *pri_detector_init(const struct radar_detector_specs *rs) INIT_LIST_HEAD(&de->sequences); INIT_LIST_HEAD(&de->pulses); - de->window_size = rs->pri_max * rs->ppb * rs->num_pri; - de->max_count = rs->ppb * 2; + de->window_size = rs->pri_max * + (rs->ppb ? rs->ppb : FCC_TYPE1_MIN_PPB) * rs->num_pri; + de->max_count = (rs->ppb ? rs->ppb : FCC_TYPE1_MAX_PPB) * 2; de->rs = rs; pool_register_ref(); diff --git a/drivers/net/wireless/ath/dfs_pri_detector.h b/drivers/net/wireless/ath/dfs_pri_detector.h index 79f0fff..f460b46 100644 --- a/drivers/net/wireless/ath/dfs_pri_detector.h +++ b/drivers/net/wireless/ath/dfs_pri_detector.h @@ -63,7 +63,7 @@ struct pri_detector { void (*reset) (struct pri_detector *de, u64 ts); /* private: internal use only */ - const struct radar_detector_specs *rs; + struct radar_detector_specs *rs; u64 last_ts; struct list_head sequences; struct list_head pulses; @@ -72,6 +72,6 @@ struct pri_detector { u32 window_size; }; -struct pri_detector *pri_detector_init(const struct radar_detector_specs *rs); +struct pri_detector *pri_detector_init(struct radar_detector_specs *rs); #endif /* DFS_PRI_DETECTOR_H */