From patchwork Sat Aug 21 01:09:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Lamparter X-Patchwork-Id: 501261 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AAD84C432BE for ; Sat, 21 Aug 2021 01:09:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 821F5611C3 for ; Sat, 21 Aug 2021 01:09:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240854AbhHUBJ5 (ORCPT ); Fri, 20 Aug 2021 21:09:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40270 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232300AbhHUBJ5 (ORCPT ); Fri, 20 Aug 2021 21:09:57 -0400 Received: from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com [IPv6:2a00:1450:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 38AF8C061757; Fri, 20 Aug 2021 18:09:18 -0700 (PDT) Received: by mail-wr1-x42a.google.com with SMTP id q10so16608150wro.2; Fri, 20 Aug 2021 18:09:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=1t5xO/vCozsm6qTyQvSV3wCxmTDXYEFQ4QrCefdVVb4=; b=UT79z/7za2bFRV8JcSGpblgfIvtPTQMS1q3EcoDR1u2ZQTDYOGrAjat2+VIN6znABT s744DbjKzO2BFYWRvtU1hBi9/RE7CcObV0q/Y74tL1OZZeioRYmOUtJuuUdqpXv3SDYR ZOBDbI4pvDT9Jn4ZbtBlDjMt1lU/eKypZiTtsj5hgIKju66O2gkmLheuTAF/6xk+tjfu MprGGFBS2C+7QofsQZokmaZuW0kUdml4CwB69han9uYDksPVB9pM9VTYRhV4oqdrw+i+ 3i7hrpijG+CVMcKsOv6EV2gdwTCGR9FUo1jb04iOs8DQRYg1Sw6xULqVBCKSaKNt7IM6 wViQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=1t5xO/vCozsm6qTyQvSV3wCxmTDXYEFQ4QrCefdVVb4=; b=K1gXY2E4HEfotPRydhMKRNbTEAZNCYh6M+cs2aSQDpFWWk4vgzIvr+XNnnE8+JvuTl +kgcuxcBTGnyR16HSkqeta/UJucrUBtThB9V/nSkns5DQwhGrUM0ZbyMhZQ7lnTqJoRc jdFUQJDJTCD+oglCacSaHTzdqSKQc5C/c6+NveXyGGg6ezEzV/XNcCvnvfiexrCUFUZG MMwb7QR3q2D5tSdoEhVx/FlfyVs26oLh83vPXogbud1d0uL5yfv2VFgtQFhnOoBlG78n xprT/hJaH0kjC6Hl5Me3msNb22LHplI8q308P0rzLEelSo/cdShSj+ldhX7X5l0Uen7R /YUQ== X-Gm-Message-State: AOAM531pkPjZxCrkmsKy9AYDTnFhjQx3wgWa8OjaxV0/FomWCPmXBMZO olGGh3uucPaeU6wa+RtMu4sOPdmuuFk= X-Google-Smtp-Source: ABdhPJw4z3kdnmiOMiQAsevSygP5qrdnYZiLRh8mcomr0VNIxHLrdtIUfpXub60Px7D+b7E3fbJbLA== X-Received: by 2002:adf:f707:: with SMTP id r7mr1368438wrp.175.1629508156661; Fri, 20 Aug 2021 18:09:16 -0700 (PDT) Received: from debian64.daheim (pd9e297bb.dip0.t-ipconnect.de. [217.226.151.187]) by smtp.gmail.com with ESMTPSA id u16sm7441259wmc.41.2021.08.20.18.09.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Aug 2021 18:09:16 -0700 (PDT) Received: from chuck by debian64.daheim with local (Exim 4.94.2) (envelope-from ) id 1mHFVb-0046Wx-8U; Sat, 21 Aug 2021 03:09:15 +0200 From: Christian Lamparter To: linux-wireless@vger.kernel.org, devicetree@vger.kernel.org, ath9k-devel@qca.qualcomm.com Subject: [RFC PATCH v1 2/3] ath9k: fetch calibration data via nvmem subsystem Date: Sat, 21 Aug 2021 03:09:14 +0200 Message-Id: X-Mailer: git-send-email 2.33.0 In-Reply-To: <91e68ca7f65bee7197ed5829ef91bc526df16e8a.1629508039.git.chunkeey@gmail.com> References: <91e68ca7f65bee7197ed5829ef91bc526df16e8a.1629508039.git.chunkeey@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On most embedded ath9k devices (like range extenders, routers, accesspoints, ...) the calibration data is stored in a MTD partitions named "ART", or "caldata"/ "calibration". Since commit 4b361cfa8624 ("mtd: core: add OTP nvmem provider support"): All MTD partitions are all automatically available through the nvmem subsystem. This feature - together with an nvmem cell definition in the device-tree - allows drivers like ath9k to get the data necessary for starting the WIFI, without having to wait around for the filesystem and userspace to do the extractions. Signed-off-by: Christian Lamparter --- drivers/net/wireless/ath/ath9k/eeprom.c | 12 +++++- drivers/net/wireless/ath/ath9k/hw.h | 2 + drivers/net/wireless/ath/ath9k/init.c | 56 +++++++++++++++++++++++++ 3 files changed, 69 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/eeprom.c b/drivers/net/wireless/ath/ath9k/eeprom.c index c22d457dbc54..e6b3cd49ea18 100644 --- a/drivers/net/wireless/ath/ath9k/eeprom.c +++ b/drivers/net/wireless/ath/ath9k/eeprom.c @@ -135,13 +135,23 @@ static bool ath9k_hw_nvram_read_firmware(const struct firmware *eeprom_blob, offset, data); } +static bool ath9k_hw_nvram_read_nvmem(struct ath_hw *ah, off_t offset, + u16 *data) +{ + return ath9k_hw_nvram_read_array(ah->nvmem_blob, + ah->nvmem_blob_len / sizeof(u16), + offset, data); +} + bool ath9k_hw_nvram_read(struct ath_hw *ah, u32 off, u16 *data) { struct ath_common *common = ath9k_hw_common(ah); struct ath9k_platform_data *pdata = ah->dev->platform_data; bool ret; - if (ah->eeprom_blob) + if (ah->nvmem_blob) + ret = ath9k_hw_nvram_read_nvmem(ah, off, data); + else if (ah->eeprom_blob) ret = ath9k_hw_nvram_read_firmware(ah->eeprom_blob, off, data); else if (pdata && !pdata->use_eeprom) ret = ath9k_hw_nvram_read_pdata(pdata, off, data); diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h index b7b65b1c90e8..096a206f49ed 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -977,6 +977,8 @@ struct ath_hw { bool disable_5ghz; const struct firmware *eeprom_blob; + u16 *nvmem_blob; /* devres managed */ + size_t nvmem_blob_len; struct ath_dynack dynack; diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index e9a36dd7144f..1568730fc01e 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -568,6 +569,57 @@ static void ath9k_eeprom_release(struct ath_softc *sc) release_firmware(sc->sc_ah->eeprom_blob); } +static int ath9k_nvmem_request_eeprom(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + struct nvmem_cell *cell; + void *buf; + size_t len; + int err; + + cell = devm_nvmem_cell_get(sc->dev, "calibration"); + if (IS_ERR(cell)) { + err = PTR_ERR(cell); + + /* nvmem cell might not be defined, or the nvmem + * subsystem isn't included. In this case, follow + * the established "just return 0;" convention of + * ath9k_init_platform to say: + * "All good. Nothing to see here. Please go on." + */ + if (err == -ENOENT || err == -EOPNOTSUPP) + return 0; + + return err; + } + + buf = nvmem_cell_read(cell, &len); + if (IS_ERR(buf)) + return PTR_ERR(buf); + + /* run basic sanity checks on the returned nvram cell length. + * That length has to be a multiple of a "u16" (i.e.: & 1). + * Furthermore, it has to be more than "let's say" 512 bytes + * but less than the maximum of AR9300_EEPROM_SIZE (16kb). + */ + if ((len & 1) == 1 || len < 512 || len >= AR9300_EEPROM_SIZE) { + kfree(buf); + return -EINVAL; + } + + /* devres manages the calibration values release on shutdown */ + ah->nvmem_blob = (u16 *)devm_kmemdup(sc->dev, buf, len, GFP_KERNEL); + kfree(buf); + if (IS_ERR(ah->nvmem_blob)) + return PTR_ERR(ah->nvmem_blob); + + ah->nvmem_blob_len = len; + ah->ah_flags &= ~AH_USE_EEPROM; + ah->ah_flags |= AH_NO_EEP_SWAP; + + return 0; +} + static int ath9k_init_platform(struct ath_softc *sc) { struct ath9k_platform_data *pdata = sc->dev->platform_data; @@ -704,6 +756,10 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc, if (ret) return ret; + ret = ath9k_nvmem_request_eeprom(sc); + if (ret) + return ret; + if (ath9k_led_active_high != -1) ah->config.led_active_high = ath9k_led_active_high == 1; From patchwork Sat Aug 21 01:09:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Lamparter X-Patchwork-Id: 501260 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 805B7C4320A for ; Sat, 21 Aug 2021 01:09:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 58590611C4 for ; Sat, 21 Aug 2021 01:09:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240927AbhHUBJ6 (ORCPT ); Fri, 20 Aug 2021 21:09:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40266 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229783AbhHUBJ5 (ORCPT ); Fri, 20 Aug 2021 21:09:57 -0400 Received: from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com [IPv6:2a00:1450:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2BD4BC061575; Fri, 20 Aug 2021 18:09:18 -0700 (PDT) Received: by mail-wr1-x42a.google.com with SMTP id u16so16580841wrn.5; Fri, 20 Aug 2021 18:09:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=/oZ+KBthaGg5R0Lga8JYmghLqYOInCSyoGhUWJuf5Fg=; b=up9NvqsaE1X2uNtv+tk/1rrTTQbblNZNzEcLUB/WChGmUnCXK84hnflgjqpxQYSvqa W3t+8i0SMMwOXyQ0oQjZx2vK4BBCswkRNp3qWl/T0KSg3pJzZ5SwtjKBsVae0Cpa5aMq gOYroB91h7ce52yYY73Llpl1mhdNO+HbsOmgjdjTdyMDUq2iTm/ZEHA+AC4pR5H3jK7z kXigEL3kWzcxZNjK0i/7t1SdgmUjA9tDV3/mfkxgQrGL4IFScDR9nX233/A1p38kV9+l iiupy6Bt4ePOGv5HcFY5YJOQxaUjhZ2CoGRxSoQMcqnTmw2pk/twPUBhsMZIfFQ0JSI+ 8EQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=/oZ+KBthaGg5R0Lga8JYmghLqYOInCSyoGhUWJuf5Fg=; b=ZON41UBmch/HXDXswhZT7MyCgj7BgGTH+EApIneGb8NrVZRcksKd/ygHDZWksRMg5i CDcEvKVmTY3DrWWrBAzmwLaQoKKKk1X9k36CvkCyw1Bm82IwZXZsQDIuvO+z6PeHL4NC Vi8ALbZCHJAwhkyE/d+DSzzsk7cjLWprHvBMOuMvvjKb9nfOGsuhKx6urBD6fhwEvv8d HUBl0HG3u6X6ZCa4wLXob8yk93dvFpo3+l0PSfitko63QuBcQx5vE9HBnHLsSzzm9x7z j8e1laN20e3Ue2JBqBmCjkTqR3Eui23EoqO55CJwRd7tb/bvB8FqMrywETus9haGx6T6 UtZQ== X-Gm-Message-State: AOAM530sjKRZmxNtnaglhellFKhRxlrqZyUKGTPxFipoEkLSngL9BgVK J+QzEx+RSC2dUGqz346z1hoWon/niAI= X-Google-Smtp-Source: ABdhPJwpdjjbaIAnSrbGQoygE55Z+vBB6F0UybfUhi+lUEQsOdkvJMCBE+2qRupVS6Q4O+aRf9SLJA== X-Received: by 2002:adf:c006:: with SMTP id z6mr1442666wre.157.1629508156374; Fri, 20 Aug 2021 18:09:16 -0700 (PDT) Received: from debian64.daheim (pd9e297bb.dip0.t-ipconnect.de. [217.226.151.187]) by smtp.gmail.com with ESMTPSA id u5sm7349201wrr.94.2021.08.20.18.09.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Aug 2021 18:09:15 -0700 (PDT) Received: from chuck by debian64.daheim with local (Exim 4.94.2) (envelope-from ) id 1mHFVb-0046Wz-9A; Sat, 21 Aug 2021 03:09:15 +0200 From: Christian Lamparter To: linux-wireless@vger.kernel.org, devicetree@vger.kernel.org, ath9k-devel@qca.qualcomm.com Subject: [RFC PATCH v1 3/3] ath9k: owl-loader: fetch pci init values through nvmem Date: Sat, 21 Aug 2021 03:09:15 +0200 Message-Id: X-Mailer: git-send-email 2.33.0 In-Reply-To: <91e68ca7f65bee7197ed5829ef91bc526df16e8a.1629508039.git.chunkeey@gmail.com> References: <91e68ca7f65bee7197ed5829ef91bc526df16e8a.1629508039.git.chunkeey@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org extends the owl loader to fetch important pci initialization values - which are stored together with the calibration data - through the nvmem subsystem. This allows for much faster WIFI/ath9k initializations on devices that do not require to perform any post-processing (like XOR'ing/ reversal or unpacking) since no userspace helper is required. Signed-off-by: Christian Lamparter --- .../wireless/ath/ath9k/ath9k_pci_owl_loader.c | 105 +++++++++++++----- 1 file changed, 76 insertions(+), 29 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k_pci_owl_loader.c b/drivers/net/wireless/ath/ath9k/ath9k_pci_owl_loader.c index 56d1a7764b9f..708c8969b503 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k_pci_owl_loader.c +++ b/drivers/net/wireless/ath/ath9k/ath9k_pci_owl_loader.c @@ -19,9 +19,14 @@ #include #include #include +#include +#include struct owl_ctx { + struct pci_dev *pdev; struct completion eeprom_load; + struct work_struct work; + struct nvmem_cell *cell; }; #define EEPROM_FILENAME_LEN 100 @@ -42,6 +47,12 @@ static int ath9k_pci_fixup(struct pci_dev *pdev, const u16 *cal_data, u32 bar0; bool swap_needed = false; + /* also note that we are doing *u16 operations on the file */ + if (cal_len > 4096 || cal_len < 0x200 || (cal_len & 1) == 1) { + dev_err(&pdev->dev, "eeprom has an invalid size.\n"); + return -EINVAL; + } + if (*cal_data != AR5416_EEPROM_MAGIC) { if (*cal_data != swab16(AR5416_EEPROM_MAGIC)) { dev_err(&pdev->dev, "invalid calibration data\n"); @@ -99,38 +110,31 @@ static int ath9k_pci_fixup(struct pci_dev *pdev, const u16 *cal_data, return 0; } -static void owl_fw_cb(const struct firmware *fw, void *context) +static void owl_rescan(struct pci_dev *pdev) { - struct pci_dev *pdev = (struct pci_dev *)context; - struct owl_ctx *ctx = (struct owl_ctx *)pci_get_drvdata(pdev); - struct pci_bus *bus; - - complete(&ctx->eeprom_load); - - if (!fw) { - dev_err(&pdev->dev, "no eeprom data received.\n"); - goto release; - } - - /* also note that we are doing *u16 operations on the file */ - if (fw->size > 4096 || fw->size < 0x200 || (fw->size & 1) == 1) { - dev_err(&pdev->dev, "eeprom file has an invalid size.\n"); - goto release; - } - - if (ath9k_pci_fixup(pdev, (const u16 *)fw->data, fw->size)) - goto release; + struct pci_bus *bus = pdev->bus; pci_lock_rescan_remove(); - bus = pdev->bus; pci_stop_and_remove_bus_device(pdev); /* the device should come back with the proper * ProductId. But we have to initiate a rescan. */ pci_rescan_bus(bus); pci_unlock_rescan_remove(); +} + +static void owl_fw_cb(const struct firmware *fw, void *context) +{ + struct owl_ctx *ctx = (struct owl_ctx *)context; + + complete(&ctx->eeprom_load); -release: + if (fw) { + ath9k_pci_fixup(ctx->pdev, (const u16 *)fw->data, fw->size); + owl_rescan(ctx->pdev); + } else { + dev_err(&ctx->pdev->dev, "no eeprom data received.\n"); + } release_firmware(fw); } @@ -152,6 +156,43 @@ static const char *owl_get_eeprom_name(struct pci_dev *pdev) return eeprom_name; } +static void owl_nvmem_work(struct work_struct *work) +{ + struct owl_ctx *ctx = container_of(work, struct owl_ctx, work); + void *buf; + size_t len; + + complete(&ctx->eeprom_load); + + buf = nvmem_cell_read(ctx->cell, &len); + if (!IS_ERR(buf)) { + ath9k_pci_fixup(ctx->pdev, buf, len); + kfree(buf); + owl_rescan(ctx->pdev); + } else { + dev_err(&ctx->pdev->dev, "no nvmem data received.\n"); + } +} + +static int owl_nvmem_probe(struct owl_ctx *ctx) +{ + int err; + + ctx->cell = devm_nvmem_cell_get(&ctx->pdev->dev, "calibration"); + if (IS_ERR(ctx->cell)) { + err = PTR_ERR(ctx->cell); + if (err == -ENOENT || err == -EOPNOTSUPP) + return 1; /* not present, try firmware_request */ + + return err; + } + + INIT_WORK(&ctx->work, owl_nvmem_work); + schedule_work(&ctx->work); + + return 0; +} + static int owl_probe(struct pci_dev *pdev, const struct pci_device_id *id) { @@ -164,21 +205,27 @@ static int owl_probe(struct pci_dev *pdev, pcim_pin_device(pdev); - eeprom_name = owl_get_eeprom_name(pdev); - if (!eeprom_name) { - dev_err(&pdev->dev, "no eeprom filename found.\n"); - return -ENODEV; - } - ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return -ENOMEM; init_completion(&ctx->eeprom_load); + ctx->pdev = pdev; pci_set_drvdata(pdev, ctx); + + err = owl_nvmem_probe(ctx); + if (err <= 0) + return err; + + eeprom_name = owl_get_eeprom_name(pdev); + if (!eeprom_name) { + dev_err(&pdev->dev, "no eeprom filename found.\n"); + return -ENODEV; + } + err = request_firmware_nowait(THIS_MODULE, true, eeprom_name, - &pdev->dev, GFP_KERNEL, pdev, owl_fw_cb); + &pdev->dev, GFP_KERNEL, ctx, owl_fw_cb); if (err) dev_err(&pdev->dev, "failed to request caldata (%d).\n", err);