From patchwork Fri Oct 13 12:06:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 13420829 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D834914A81 for ; Fri, 13 Oct 2023 12:06:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="fKvxRAKQ" Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09C84DD for ; Fri, 13 Oct 2023 05:06:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697198808; x=1728734808; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hmCCKNFkGjdI8aTGAHf7YxUFc9mi+ckVTptEz+oSVCM=; b=fKvxRAKQB5cdbuG4OiqgmKu83RJPqDb9hwWHy6AsYTIhDPW3AChw9mWm MiZZ4EQLP2OtOyy4oIeYLsw2IOFFSeB9r5xMw/ec66EGQvTdCVvGwzO4r 22KvZNpKeliSQufSGskffWaQ7PbOZBz/L0Z0o6VUYsm2+i1DG5ogLWYCE 5evCTmHMxWWN+gzWtlwKOdd+ovoDO9DduZgeS3tMBOkrqgn9CcFQFANIX HIE+5WmVBxkbdfikI/NQTGdvJ3IbcsTTiKZvdXtbTmRXT5XokSBq9Wypj Q6zAbBy63r2iV1XNd//Y5W1UtPMzOH+ZRb4byn9Z/2/IFN/e6pGXHN2La w==; X-IronPort-AV: E=McAfee;i="6600,9927,10861"; a="389033484" X-IronPort-AV: E=Sophos;i="6.03,222,1694761200"; d="scan'208";a="389033484" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Oct 2023 05:06:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10861"; a="820602096" X-IronPort-AV: E=Sophos;i="6.03,222,1694761200"; d="scan'208";a="820602096" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga008.fm.intel.com with ESMTP; 13 Oct 2023 05:06:45 -0700 Received: by black.fi.intel.com (Postfix, from userid 1001) id 1867776E; Fri, 13 Oct 2023 15:06:41 +0300 (EEST) From: Mika Westerberg To: linux-usb@vger.kernel.org Cc: Yehezkel Bernat , Michael Jamet , Lukas Wunner , Andreas Noever , Gil Fine , Mika Westerberg Subject: [PATCH v2 06/10] thunderbolt: Introduce tb_port_path_direction_downstream() Date: Fri, 13 Oct 2023 15:06:36 +0300 Message-Id: <20231013120640.709255-7-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231013120640.709255-1-mika.westerberg@linux.intel.com> References: <20231013120640.709255-1-mika.westerberg@linux.intel.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net From: Gil Fine Introduce tb_port_path_direction_downstream() to check if path from source adapter to destination adapter is directed towards downstream. Convert existing users to call this helper instead of open-coding. No functional changes. Signed-off-by: Gil Fine Signed-off-by: Mika Westerberg --- drivers/thunderbolt/tb.c | 6 +++--- drivers/thunderbolt/tb.h | 15 +++++++++++++++ drivers/thunderbolt/tunnel.c | 14 +++++++------- 3 files changed, 25 insertions(+), 10 deletions(-) diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index 96eb7d9fdedf..e1e2792d14a7 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -553,7 +553,7 @@ static struct tb_tunnel *tb_find_first_usb3_tunnel(struct tb *tb, struct tb_switch *sw; /* Pick the router that is deepest in the topology */ - if (dst_port->sw->config.depth > src_port->sw->config.depth) + if (tb_port_path_direction_downstream(src_port, dst_port)) sw = dst_port->sw; else sw = src_port->sw; @@ -1224,7 +1224,7 @@ tb_recalc_estimated_bandwidth_for_group(struct tb_bandwidth_group *group) "re-calculated estimated bandwidth %u/%u Mb/s\n", estimated_up, estimated_down); - if (in->sw->config.depth < out->sw->config.depth) + if (tb_port_path_direction_downstream(in, out)) estimated_bw = estimated_down; else estimated_bw = estimated_up; @@ -1958,7 +1958,7 @@ static void tb_handle_dp_bandwidth_request(struct work_struct *work) out = tunnel->dst_port; - if (in->sw->config.depth < out->sw->config.depth) { + if (tb_port_path_direction_downstream(in, out)) { requested_up = -1; requested_down = requested_bw; } else { diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 3c9ae5584569..6d49510eea09 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -1041,6 +1041,21 @@ void tb_port_release_out_hopid(struct tb_port *port, int hopid); struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end, struct tb_port *prev); +/** + * tb_port_path_direction_downstream() - Checks if path directed downstream + * @src: Source adapter + * @dst: Destination adapter + * + * Returns %true only if the specified path from source adapter (@src) + * to destination adapter (@dst) is directed downstream. + */ +static inline bool +tb_port_path_direction_downstream(const struct tb_port *src, + const struct tb_port *dst) +{ + return src->sw->config.depth < dst->sw->config.depth; +} + static inline bool tb_port_use_credit_allocation(const struct tb_port *port) { return tb_port_is_null(port) && port->sw->credit_allocation; diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c index db0546c62cb3..7534cd3a81f4 100644 --- a/drivers/thunderbolt/tunnel.c +++ b/drivers/thunderbolt/tunnel.c @@ -687,7 +687,7 @@ static int tb_dp_xchg_caps(struct tb_tunnel *tunnel) "DP OUT maximum supported bandwidth %u Mb/s x%u = %u Mb/s\n", out_rate, out_lanes, bw); - if (in->sw->config.depth < out->sw->config.depth) + if (tb_port_path_direction_downstream(in, out)) max_bw = tunnel->max_down; else max_bw = tunnel->max_up; @@ -812,7 +812,7 @@ static int tb_dp_bandwidth_alloc_mode_enable(struct tb_tunnel *tunnel) * max_up/down fields. For discovery we just read what the * estimation was set to. */ - if (in->sw->config.depth < out->sw->config.depth) + if (tb_port_path_direction_downstream(in, out)) estimated_bw = tunnel->max_down; else estimated_bw = tunnel->max_up; @@ -982,7 +982,7 @@ static int tb_dp_bandwidth_mode_consumed_bandwidth(struct tb_tunnel *tunnel, if (allocated_bw == max_bw) allocated_bw = ret; - if (in->sw->config.depth < out->sw->config.depth) { + if (tb_port_path_direction_downstream(in, out)) { *consumed_up = 0; *consumed_down = allocated_bw; } else { @@ -1017,7 +1017,7 @@ static int tb_dp_allocated_bandwidth(struct tb_tunnel *tunnel, int *allocated_up if (allocated_bw == max_bw) allocated_bw = ret; - if (in->sw->config.depth < out->sw->config.depth) { + if (tb_port_path_direction_downstream(in, out)) { *allocated_up = 0; *allocated_down = allocated_bw; } else { @@ -1045,7 +1045,7 @@ static int tb_dp_alloc_bandwidth(struct tb_tunnel *tunnel, int *alloc_up, if (ret < 0) return ret; - if (in->sw->config.depth < out->sw->config.depth) { + if (tb_port_path_direction_downstream(in, out)) { tmp = min(*alloc_down, max_bw); ret = usb4_dp_port_allocate_bandwidth(in, tmp); if (ret) @@ -1143,7 +1143,7 @@ static int tb_dp_maximum_bandwidth(struct tb_tunnel *tunnel, int *max_up, if (ret < 0) return ret; - if (in->sw->config.depth < tunnel->dst_port->sw->config.depth) { + if (tb_port_path_direction_downstream(in, tunnel->dst_port)) { *max_up = 0; *max_down = ret; } else { @@ -1201,7 +1201,7 @@ static int tb_dp_consumed_bandwidth(struct tb_tunnel *tunnel, int *consumed_up, return 0; } - if (in->sw->config.depth < tunnel->dst_port->sw->config.depth) { + if (tb_port_path_direction_downstream(in, tunnel->dst_port)) { *consumed_up = 0; *consumed_down = tb_dp_bandwidth(rate, lanes); } else {