From patchwork Thu Oct 5 09:27:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 13410050 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 D2D1D26E37 for ; Thu, 5 Oct 2023 13:50:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="JrJ5OEH8" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0F4C51FCF for ; Thu, 5 Oct 2023 06:50:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1696513803; x=1728049803; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Tq19dG8HTV0HD++pkzwJ9cD7yL1DaQZBgD7uGCv1/tY=; b=JrJ5OEH8mPaIJvbVMzfppoKUfY1CHEtdvjvC1KbNroyQLPMeyqwgYRbP rbD83OU/QI8CHB7nZ7VMvbNffm6B7TYUF/rNkpNgJVesI2RwWoP4T3JOu UfnIz95a8veZwlugMqDp3hMAIJZj7JT4oKSvUlBXtevJyhlFbPrH0TTVB ttAwi0KtghTSvIykp1OpT+e+hUTQBQvvnSINyUwwsOt7ace9KkxkaLOZT MebirpauyBMCLGGkpQD3uRGzSPbmnD9K+hPfdqOQP/Aey5sAQYsG/HH14 eileXj1f77eGgezJtePq6BxLGw+JNIfLMi5W1i+wstZ5lGIURCIvDNWRj A==; X-IronPort-AV: E=McAfee;i="6600,9927,10853"; a="383355563" X-IronPort-AV: E=Sophos;i="6.03,202,1694761200"; d="scan'208";a="383355563" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Oct 2023 02:27:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10853"; a="728369869" X-IronPort-AV: E=Sophos;i="6.03,202,1694761200"; d="scan'208";a="728369869" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga006.jf.intel.com with ESMTP; 05 Oct 2023 02:27:31 -0700 Received: by black.fi.intel.com (Postfix, from userid 1001) id ED3F04A0; Thu, 5 Oct 2023 12:27:29 +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 03/10] thunderbolt: Make is_gen4_link() available to the rest of the driver Date: Thu, 5 Oct 2023 12:27:22 +0300 Message-Id: <20231005092729.3595447-4-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231005092729.3595447-1-mika.westerberg@linux.intel.com> References: <20231005092729.3595447-1-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,URIBL_BLOCKED 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 Rework the function to return the link generation, update the name to tb_port_get_link_generation(), and make available to the rest of the driver. This is needed in the subsequent patches. Signed-off-by: Gil Fine Signed-off-by: Mika Westerberg --- drivers/thunderbolt/switch.c | 36 +++++++++++++++++++++++++++++------- drivers/thunderbolt/tb.h | 1 + 2 files changed, 30 insertions(+), 7 deletions(-) diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index c80421eff558..bd987935d9c9 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -915,6 +915,32 @@ int tb_port_get_link_speed(struct tb_port *port) } } +/** + * tb_port_get_link_generation() - Returns link generation + * @port: Lane adapter + * + * Returns link generation as number or negative errno in case of + * failure. Does not distinguish between Thunderbolt 1 and Thunderbolt 2 + * links so for those always returns 2. + */ +int tb_port_get_link_generation(struct tb_port *port) +{ + int ret; + + ret = tb_port_get_link_speed(port); + if (ret < 0) + return ret; + + switch (ret) { + case 40: + return 4; + case 20: + return 3; + default: + return 2; + } +} + /** * tb_port_get_link_width() - Get current link width * @port: Port to check (USB4 or CIO) @@ -960,11 +986,6 @@ static bool tb_port_is_width_supported(struct tb_port *port, return widths & width_mask; } -static bool is_gen4_link(struct tb_port *port) -{ - return tb_port_get_link_speed(port) > 20; -} - /** * tb_port_set_link_width() - Set target link width of the lane adapter * @port: Lane adapter @@ -992,7 +1013,7 @@ int tb_port_set_link_width(struct tb_port *port, enum tb_link_width width) switch (width) { case TB_LINK_WIDTH_SINGLE: /* Gen 4 link cannot be single */ - if (is_gen4_link(port)) + if (tb_port_get_link_generation(port) >= 4) return -EOPNOTSUPP; val |= LANE_ADP_CS_1_TARGET_WIDTH_SINGLE << LANE_ADP_CS_1_TARGET_WIDTH_SHIFT; @@ -1141,7 +1162,8 @@ int tb_port_wait_for_link_width(struct tb_port *port, unsigned int width_mask, int ret; /* Gen 4 link does not support single lane */ - if ((width_mask & TB_LINK_WIDTH_SINGLE) && is_gen4_link(port)) + if ((width_mask & TB_LINK_WIDTH_SINGLE) && + tb_port_get_link_generation(port) >= 4) return -EOPNOTSUPP; do { diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 6f15b3a3e990..f29bbafb977f 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -1057,6 +1057,7 @@ static inline bool tb_port_use_credit_allocation(const struct tb_port *port) (p) = tb_next_port_on_path((src), (dst), (p))) int tb_port_get_link_speed(struct tb_port *port); +int tb_port_get_link_generation(struct tb_port *port); int tb_port_get_link_width(struct tb_port *port); int tb_port_set_link_width(struct tb_port *port, enum tb_link_width width); int tb_port_lane_bonding_enable(struct tb_port *port);