From patchwork Mon Jul 31 09:13:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 13334090 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 68C0AC001DE for ; Mon, 31 Jul 2023 08:47:33 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 875A41E0; Mon, 31 Jul 2023 10:46:41 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 875A41E0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1690793251; bh=u6mmbSMHH8jP59to7FzadHeajz1BccvQWhym7sQFvGo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=IS9C9J+pTnvEuksm74tM5Iy4q5qNk/jmKXZXSMawMTpABFK7sdIHsJJN+AFmTm+4J ALr/kwoNfK5Tx2OfrK8OlaxOS/VzmEv/5FAXWajWXDr9e1z4m/ItZXrD2k+aXNXI3y JHMTYZsnw04DSBSE/I3WN1gkG9euxKlQGc/2SOvw= Received: by alsa1.perex.cz (Postfix, from userid 50401) id 70D56F80571; Mon, 31 Jul 2023 10:45:47 +0200 (CEST) Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id E5742F8055C; Mon, 31 Jul 2023 10:45:46 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 8F6E2F80563; Mon, 31 Jul 2023 10:45:42 +0200 (CEST) Received: from mgamail.intel.com (unknown [192.55.52.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id F1BCBF80153 for ; Mon, 31 Jul 2023 10:45:27 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz F1BCBF80153 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=TP6aBM9d DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690793129; x=1722329129; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=u6mmbSMHH8jP59to7FzadHeajz1BccvQWhym7sQFvGo=; b=TP6aBM9dylrPQOqYfHfklCAwgDaN72EP6rKan9lJOehpvL80ofwa7pUl ev+mgkPiF6gvofReFOaSZFAhAMtNsxou2vJa3PciThCHR0kDIgosFKlc4 s6fwFwK43lnhROoHi3taGN4mhwAbYBwAjFqBqBR96vuGtnXEW3SF+oQyt vJgPZACHS9lkZpLYxUheRq7hcwEoeMaEEWtgf75GRqX6VN9uGHf+YrOeR JqoqduCspJm7N6+judBWOluejpnapeooQMNEijltb6vRsrxZ+Kk5vjtxr W/9r58TFU1cfrf9ZOzXVWOiH1Sazy+t8OS7md8uW5uaqO7zXT8cRQadoI w==; X-IronPort-AV: E=McAfee;i="6600,9927,10787"; a="348557487" X-IronPort-AV: E=Sophos;i="6.01,244,1684825200"; d="scan'208";a="348557487" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jul 2023 01:45:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10787"; a="678232312" X-IronPort-AV: E=Sophos;i="6.01,244,1684825200"; d="scan'208";a="678232312" Received: from bard-ubuntu.sh.intel.com ([10.239.185.57]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jul 2023 01:45:23 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org, pierre-louis.bossart@linux.intel.com, bard.liao@intel.com Subject: [PATCH v2 2/3] soundwire: bus: add callbacks for device_number allocation Date: Mon, 31 Jul 2023 17:13:32 +0800 Message-Id: <20230731091333.3593132-3-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230731091333.3593132-1-yung-chuan.liao@linux.intel.com> References: <20230731091333.3593132-1-yung-chuan.liao@linux.intel.com> MIME-Version: 1.0 Message-ID-Hash: C2BICRYAECJAIGZLGWRYNKOZGR5RFL4N X-Message-ID-Hash: C2BICRYAECJAIGZLGWRYNKOZGR5RFL4N X-MailFrom: yung-chuan.liao@linux.intel.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Pierre-Louis Bossart Rather than add logic in the core for vendor-specific usages, add callbacks for vendor-specific device_number allocation and release. This patch only moves the existing IDA-based allocator used only by Intel to the intel_auxdevice.c file and does not change the functionality. Follow-up patches will extend the behavior by modifying the Intel callbacks. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao --- drivers/soundwire/bus.c | 16 +++++++--------- drivers/soundwire/intel_auxdevice.c | 17 ++++++++++++++++- include/linux/soundwire/sdw.h | 8 ++++---- 3 files changed, 27 insertions(+), 14 deletions(-) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index bdd0fed45a8d..0e1e4bedc708 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -12,7 +12,6 @@ #include "sysfs_local.h" static DEFINE_IDA(sdw_bus_ida); -static DEFINE_IDA(sdw_peripheral_ida); static int sdw_get_id(struct sdw_bus *bus) { @@ -168,8 +167,8 @@ static int sdw_delete_slave(struct device *dev, void *data) if (slave->dev_num) { /* clear dev_num if assigned */ clear_bit(slave->dev_num, bus->assigned); - if (bus->dev_num_ida_min) - ida_free(&sdw_peripheral_ida, slave->dev_num); + if (bus->ops && bus->ops->put_device_num) + bus->ops->put_device_num(bus, slave); } list_del_init(&slave->node); mutex_unlock(&bus->bus_lock); @@ -710,16 +709,15 @@ EXPORT_SYMBOL(sdw_compare_devid); /* called with bus_lock held */ static int sdw_get_device_num(struct sdw_slave *slave) { + struct sdw_bus *bus = slave->bus; int bit; - if (slave->bus->dev_num_ida_min) { - bit = ida_alloc_range(&sdw_peripheral_ida, - slave->bus->dev_num_ida_min, SDW_MAX_DEVICES, - GFP_KERNEL); + if (bus->ops && bus->ops->get_device_num) { + bit = bus->ops->get_device_num(bus, slave); if (bit < 0) goto err; } else { - bit = find_first_zero_bit(slave->bus->assigned, SDW_MAX_DEVICES); + bit = find_first_zero_bit(bus->assigned, SDW_MAX_DEVICES); if (bit == SDW_MAX_DEVICES) { bit = -ENODEV; goto err; @@ -730,7 +728,7 @@ static int sdw_get_device_num(struct sdw_slave *slave) * Do not update dev_num in Slave data structure here, * Update once program dev_num is successful */ - set_bit(bit, slave->bus->assigned); + set_bit(bit, bus->assigned); err: return bit; diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_auxdevice.c index cb2f199f4f97..9d998a010162 100644 --- a/drivers/soundwire/intel_auxdevice.c +++ b/drivers/soundwire/intel_auxdevice.c @@ -125,6 +125,20 @@ static int intel_prop_read(struct sdw_bus *bus) return 0; } +static DEFINE_IDA(intel_peripheral_ida); + +static int intel_get_device_num_ida(struct sdw_bus *bus, struct sdw_slave *slave) +{ + return ida_alloc_range(&intel_peripheral_ida, + INTEL_DEV_NUM_IDA_MIN, SDW_MAX_DEVICES, + GFP_KERNEL); +} + +static void intel_put_device_num_ida(struct sdw_bus *bus, struct sdw_slave *slave) +{ + return ida_free(&intel_peripheral_ida, slave->dev_num); +} + static struct sdw_master_ops sdw_intel_ops = { .read_prop = intel_prop_read, .override_adr = sdw_dmi_override_adr, @@ -134,6 +148,8 @@ static struct sdw_master_ops sdw_intel_ops = { .pre_bank_switch = generic_pre_bank_switch, .post_bank_switch = generic_post_bank_switch, .read_ping_status = cdns_read_ping_status, + .get_device_num = intel_get_device_num_ida, + .put_device_num = intel_put_device_num_ida, .new_peripheral_assigned = generic_new_peripheral_assigned, }; @@ -167,7 +183,6 @@ static int intel_link_probe(struct auxiliary_device *auxdev, cdns->msg_count = 0; bus->link_id = auxdev->id; - bus->dev_num_ida_min = INTEL_DEV_NUM_IDA_MIN; bus->clk_stop_timeout = 1; sdw_cdns_probe(cdns); diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 94676a3fd0b5..bde93ca6aaa6 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -847,6 +847,8 @@ struct sdw_defer { * @post_bank_switch: Callback for post bank switch * @read_ping_status: Read status from PING frames, reported with two bits per Device. * Bits 31:24 are reserved. + * @get_device_num: Callback for vendor-specific device_number allocation + * @put_device_num: Callback for vendor-specific device_number release * @new_peripheral_assigned: Callback to handle enumeration of new peripheral. */ struct sdw_master_ops { @@ -862,6 +864,8 @@ struct sdw_master_ops { int (*pre_bank_switch)(struct sdw_bus *bus); int (*post_bank_switch)(struct sdw_bus *bus); u32 (*read_ping_status)(struct sdw_bus *bus); + int (*get_device_num)(struct sdw_bus *bus, struct sdw_slave *slave); + void (*put_device_num)(struct sdw_bus *bus, struct sdw_slave *slave); void (*new_peripheral_assigned)(struct sdw_bus *bus, struct sdw_slave *slave, int dev_num); @@ -898,9 +902,6 @@ struct sdw_master_ops { * meaningful if multi_link is set. If set to 1, hardware-based * synchronization will be used even if a stream only uses a single * SoundWire segment. - * @dev_num_ida_min: if set, defines the minimum values for the IDA - * used to allocate system-unique device numbers. This value needs to be - * identical across all SoundWire bus in the system. */ struct sdw_bus { struct device *dev; @@ -927,7 +928,6 @@ struct sdw_bus { u32 bank_switch_timeout; bool multi_link; int hw_sync_min_links; - int dev_num_ida_min; }; int sdw_bus_master_add(struct sdw_bus *bus, struct device *parent,