From patchwork Mon Jun 17 17:56:49 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 10999885 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 088BF924 for ; Mon, 17 Jun 2019 17:58:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F2E332898D for ; Mon, 17 Jun 2019 17:58:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E7302289C5; Mon, 17 Jun 2019 17:58:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9099D2898D for ; Mon, 17 Jun 2019 17:58:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728385AbfFQR6R (ORCPT ); Mon, 17 Jun 2019 13:58:17 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:43395 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728103AbfFQR6R (ORCPT ); Mon, 17 Jun 2019 13:58:17 -0400 Received: by mail-pf1-f195.google.com with SMTP id i189so6080200pfg.10 for ; Mon, 17 Jun 2019 10:58:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=H6daAnpQe6cozjuM2w5Q9ZcYevWIcs6lbDUbFi+TV60=; b=Vk97Y5AL/opLKskhzLbYl4lP+wZ3m8biOf8jgbmmhA1N3oDEpmKgowQpFMacThsXxY axRVxxGYvaMPD2ExpDi13Nrw8LIJDIfrZo4umkpyF7GDZ5g37H5+/VSh1Rmfc6PhsOAe NBfb2+cYL9ScL6VY5yGI7GdMmEfong8HmFMXg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=H6daAnpQe6cozjuM2w5Q9ZcYevWIcs6lbDUbFi+TV60=; b=sLAdaRnyETDfiM+Vl3LQA0vw8o5ugbElxBLWdG4b0Nb0OZeWsoNRZkseCRhsyN8pY/ sF6zwWrMr9drsNFKGKrxbURCiogOXjZjF92sxxUiSCuYqHqb0OxOr8FilMzXNP+trTw/ UaQ991an8ung4jD6Sv/Gkw8ruBRMarGaNI/BWlhGEUWoatBy256iFJL8yiVPVi8gOEWZ 6Zf3cwL2kSoETnbf5NvddWL/E+O35BCI0UmFkY4d4LAUPl/vgf05gkx1r3r8rhl3pLWL dUebMmhh8aOBbR3HsAsjro7eIHeVVql1JZGT9ZGahIksc4r0zwIYJhk1wCFmjj8AWFcE qUOQ== X-Gm-Message-State: APjAAAW1EU6H3YcUog9p0RrovFKqNPkpjHL2FwKbJnss0G099cq2/4Ga NNtUGbk2om5mxPTYFEpdxkEdFg== X-Google-Smtp-Source: APXvYqyFO1jgt5qCfLkMUXJT3GKthCKBFtUHJPL+pI8WRu8aMZ04C28O89NV9OfBU/kreJcyirLwYg== X-Received: by 2002:a17:90a:32ed:: with SMTP id l100mr27029812pjb.11.1560794296346; Mon, 17 Jun 2019 10:58:16 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:24fa:e766:52c9:e3b2]) by smtp.gmail.com with ESMTPSA id q1sm15145809pfn.178.2019.06.17.10.57.41 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 17 Jun 2019 10:57:48 -0700 (PDT) From: Douglas Anderson To: Ulf Hansson , Kalle Valo , Adrian Hunter , Arend van Spriel Cc: brcm80211-dev-list.pdl@broadcom.com, linux-rockchip@lists.infradead.org, Double Lo , briannorris@chromium.org, linux-wireless@vger.kernel.org, Naveen Gupta , Madhan Mohan R , mka@chromium.org, Wright Feng , Chi-Hsien Lin , netdev@vger.kernel.org, brcm80211-dev-list@cypress.com, Douglas Anderson , Franky Lin , linux-kernel@vger.kernel.org, Hante Meuleman , YueHaibing , "David S. Miller" Subject: [PATCH v5 1/5] Revert "brcmfmac: disable command decode in sdio_aos" Date: Mon, 17 Jun 2019 10:56:49 -0700 Message-Id: <20190617175653.21756-2-dianders@chromium.org> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog In-Reply-To: <20190617175653.21756-1-dianders@chromium.org> References: <20190617175653.21756-1-dianders@chromium.org> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This reverts commit 29f6589140a10ece8c1d73f58043ea5b3473ab3e. After that patch landed I find that my kernel log on rk3288-veyron-minnie and rk3288-veyron-speedy is filled with: brcmfmac: brcmf_sdio_bus_sleep: error while changing bus sleep state -110 This seems to happen every time the Broadcom WiFi transitions out of sleep mode. Reverting the commit fixes the problem for me, so that's what this patch does. Note that, in general, the justification in the original commit seemed a little weak. It looked like someone was testing on a SD card controller that would sometimes die if there were CRC errors on the bus. This used to happen back in early days of dw_mmc (the controller on my boards), but we fixed it. Disabling a feature on all boards just because one SD card controller is broken seems bad. Fixes: 29f6589140a1 ("brcmfmac: disable command decode in sdio_aos") Cc: Wright Feng Cc: Double Lo Cc: Madhan Mohan R Cc: Chi-Hsien Lin Signed-off-by: Douglas Anderson --- This commit to land in the wireless tree. OK to land it separately from the rest of the series. Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: - A full revert, not just a partial one (Arend). ...with explicit Cc. drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c index 4e15ea57d4f5..4a750838d8cd 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c @@ -3364,11 +3364,7 @@ static int brcmf_sdio_download_firmware(struct brcmf_sdio *bus, static bool brcmf_sdio_aos_no_decode(struct brcmf_sdio *bus) { - if (bus->ci->chip == CY_CC_43012_CHIP_ID || - bus->ci->chip == CY_CC_4373_CHIP_ID || - bus->ci->chip == BRCM_CC_4339_CHIP_ID || - bus->ci->chip == BRCM_CC_4345_CHIP_ID || - bus->ci->chip == BRCM_CC_4354_CHIP_ID) + if (bus->ci->chip == CY_CC_43012_CHIP_ID) return true; else return false; From patchwork Mon Jun 17 17:56:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 10999899 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5DCA41398 for ; Mon, 17 Jun 2019 17:59:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5151B2898D for ; Mon, 17 Jun 2019 17:59:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 445BF289C5; Mon, 17 Jun 2019 17:59:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A1FC9289A6 for ; 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bh=98n6ZHrDJ8hHttCLc1inB11JuSkBEgDS0TKJr/PR7Zk=; b=RaPzD9wLvNH/Bx4ni971RZF5U+jXzeXCPzT/VHrFXbc3XMAZujsjhhNEXaJerHR1KG JCOUvF0wlzz5V+mFrWuzEAu+uvMk78PedHEJ4J4jZspdQCHuuWbiCQYzj/z+B7yOLm9Z ITW6JCoNDPi8Dk+577a7Ct3BqjmaqcH05XlQgddQtravXXm+qggqAzRf40dxdmWw1LH7 wiNI8V2cXqWgeyDCl2sbYS0SUXf09rDV3bVClTdjx/g9p49BzfhecseAeei+paGmy3N7 186Mb3Mdgryx97kK+noTU7wEJymJwYro92ab1Z4bGnf4vFiRIw9MbcGVpUpz+6Bdcs9n 2gvg== X-Gm-Message-State: APjAAAUxuAoT9MBfIrCyDknKVA7RidipXzS5oXjCocHfMgLxZBXwi3jq Wlh6tS45AwyskWxQDMHiZLEZ2+NTOK4= X-Google-Smtp-Source: APXvYqxhK3GXMrgbsgnHN+m3eV/JC6yuo7bBQmIJ3YfzRrEjP9lcqXWS3vYT5HeqNxLLgFp/OooEMw== X-Received: by 2002:a17:902:8f81:: with SMTP id z1mr42314084plo.290.1560794342357; Mon, 17 Jun 2019 10:59:02 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:24fa:e766:52c9:e3b2]) by smtp.gmail.com with ESMTPSA id q1sm15145809pfn.178.2019.06.17.10.58.16 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 17 Jun 2019 10:58:59 -0700 (PDT) From: Douglas Anderson To: Ulf Hansson , Kalle Valo , Adrian Hunter , Arend van Spriel Cc: brcm80211-dev-list.pdl@broadcom.com, linux-rockchip@lists.infradead.org, Double Lo , briannorris@chromium.org, linux-wireless@vger.kernel.org, Naveen Gupta , Madhan Mohan R , mka@chromium.org, Wright Feng , Chi-Hsien Lin , netdev@vger.kernel.org, brcm80211-dev-list@cypress.com, Douglas Anderson , stable@vger.kernel.org, Jiong Wu , Ritesh Harjani , Allison Randal , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Greg Kroah-Hartman , Wolfram Sang , Avri Altman , =?utf-8?q?Niklas_S=C3=B6derlund?= Subject: [PATCH v5 2/5] mmc: core: API to temporarily disable retuning for SDIO CRC errors Date: Mon, 17 Jun 2019 10:56:50 -0700 Message-Id: <20190617175653.21756-3-dianders@chromium.org> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog In-Reply-To: <20190617175653.21756-1-dianders@chromium.org> References: <20190617175653.21756-1-dianders@chromium.org> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Normally when the MMC core sees an "-EILSEQ" error returned by a host controller then it will trigger a retuning of the card. This is generally a good idea. However, if a command is expected to sometimes cause transfer errors then these transfer errors shouldn't cause a re-tuning. This re-tuning will be a needless waste of time. One example case where a transfer is expected to cause errors is when transitioning between idle (sometimes referred to as "sleep" in Broadcom code) and active state on certain Broadcom WiFi SDIO cards. Specifically if the card was already transitioning between states when the command was sent it could cause an error on the SDIO bus. Let's add an API that the SDIO function drivers can call that will temporarily disable the auto-tuning functionality. Then we can add a call to this in the Broadcom WiFi driver and any other driver that might have similar needs. NOTE: this makes the assumption that the card is already tuned well enough that it's OK to disable the auto-retuning during one of these error-prone situations. Presumably the driver code performing the error-prone transfer knows how to recover / retry from errors. ...and after we can get back to a state where transfers are no longer error-prone then we can enable the auto-retuning again. If we truly find ourselves in a case where the card needs to be retuned sometimes to handle one of these error-prone transfers then we can always try a few transfers first without auto-retuning and then re-try with auto-retuning if the first few fail. Without this change on rk3288-veyron-minnie I periodically see this in the logs of a machine just sitting there idle: dwmmc_rockchip ff0d0000.dwmmc: Successfully tuned phase to XYZ Commit notes: Patches #2 - #5 will go through Ulf's tree. END Fixes: bd11e8bd03ca ("mmc: core: Flag re-tuning is needed on CRC errors") Cc: stable@vger.kernel.org Signed-off-by: Douglas Anderson Acked-by: Adrian Hunter --- Changes in v5: - Add missing sdio_retune_crc_enable() in comments (Ulf). - /s/reneable/re-enable (Ulf). - Remove leftover prototypes: mmc_expect_errors_begin() / end() (Ulf). Changes in v4: - Moved to SDIO API only (Adrian, Ulf). - Renamed to make it less generic, now retune_crc_disable (Ulf). - Function header makes it clear host must be claimed (Ulf). - No more WARN_ON (Ulf). Changes in v3: - Took out the spinlock since I believe this is all in one context. Changes in v2: - Updated commit message to clarify based on discussion of v1. drivers/mmc/core/core.c | 5 +++-- drivers/mmc/core/sdio_io.c | 37 +++++++++++++++++++++++++++++++++++ include/linux/mmc/host.h | 1 + include/linux/mmc/sdio_func.h | 3 +++ 4 files changed, 44 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 6db36dc870b5..9020cb2490f7 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -144,8 +144,9 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) int err = cmd->error; /* Flag re-tuning needed on CRC errors */ - if ((cmd->opcode != MMC_SEND_TUNING_BLOCK && - cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) && + if (cmd->opcode != MMC_SEND_TUNING_BLOCK && + cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200 && + !host->retune_crc_disable && (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || (mrq->data && mrq->data->error == -EILSEQ) || (mrq->stop && mrq->stop->error == -EILSEQ))) diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c index f79f0b0caab8..0acb1a29c968 100644 --- a/drivers/mmc/core/sdio_io.c +++ b/drivers/mmc/core/sdio_io.c @@ -734,3 +734,40 @@ int sdio_set_host_pm_flags(struct sdio_func *func, mmc_pm_flag_t flags) return 0; } EXPORT_SYMBOL_GPL(sdio_set_host_pm_flags); + +/** + * sdio_retune_crc_disable - temporarily disable retuning on CRC errors + * @func: SDIO function attached to host + * + * If the SDIO card is known to be in a state where it might produce + * CRC errors on the bus in response to commands (like if we know it is + * transitioning between power states), an SDIO function driver can + * call this function to temporarily disable the SD/MMC core behavior of + * triggering an automatic retuning. + * + * This function should be called while the host is claimed and the host + * should remain claimed until sdio_retune_crc_enable() is called. + * Specifically, the expected sequence of calls is: + * - sdio_claim_host() + * - sdio_retune_crc_disable() + * - some number of calls like sdio_writeb() and sdio_readb() + * - sdio_retune_crc_enable() + * - sdio_release_host() + */ +void sdio_retune_crc_disable(struct sdio_func *func) +{ + func->card->host->retune_crc_disable = true; +} +EXPORT_SYMBOL_GPL(sdio_retune_crc_disable); + +/** + * sdio_retune_crc_enable - re-enable retuning on CRC errors + * @func: SDIO function attached to host + * + * This is the compement to sdio_retune_crc_disable(). + */ +void sdio_retune_crc_enable(struct sdio_func *func) +{ + func->card->host->retune_crc_disable = false; +} +EXPORT_SYMBOL_GPL(sdio_retune_crc_enable); diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 43d0f0c496f6..ecb7972e2423 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -398,6 +398,7 @@ struct mmc_host { unsigned int retune_now:1; /* do re-tuning at next req */ unsigned int retune_paused:1; /* re-tuning is temporarily disabled */ unsigned int use_blk_mq:1; /* use blk-mq */ + unsigned int retune_crc_disable:1; /* don't trigger retune upon crc */ int rescan_disable; /* disable card detection */ int rescan_entered; /* used with nonremovable devices */ diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h index e9dfdd501cd1..4820e6d09dac 100644 --- a/include/linux/mmc/sdio_func.h +++ b/include/linux/mmc/sdio_func.h @@ -167,4 +167,7 @@ extern void sdio_f0_writeb(struct sdio_func *func, unsigned char b, extern mmc_pm_flag_t sdio_get_host_pm_caps(struct sdio_func *func); extern int sdio_set_host_pm_flags(struct sdio_func *func, mmc_pm_flag_t flags); +extern void sdio_retune_crc_disable(struct sdio_func *func); +extern void sdio_retune_crc_enable(struct sdio_func *func); + #endif /* LINUX_MMC_SDIO_FUNC_H */ From patchwork Mon Jun 17 17:56:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 10999901 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6F50B1398 for ; Mon, 17 Jun 2019 17:59:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 655D32898D for ; Mon, 17 Jun 2019 17:59:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 591AE289C5; Mon, 17 Jun 2019 17:59:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E93362898D for ; 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Miller" , Franky Lin , linux-kernel@vger.kernel.org, Hante Meuleman , YueHaibing , Michael Trimarchi Subject: [PATCH v5 3/5] brcmfmac: sdio: Disable auto-tuning around commands expected to fail Date: Mon, 17 Jun 2019 10:56:51 -0700 Message-Id: <20190617175653.21756-4-dianders@chromium.org> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog In-Reply-To: <20190617175653.21756-1-dianders@chromium.org> References: <20190617175653.21756-1-dianders@chromium.org> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP There are certain cases, notably when transitioning between sleep and active state, when Broadcom SDIO WiFi cards will produce errors on the SDIO bus. This is evident from the source code where you can see that we try commands in a loop until we either get success or we've tried too many times. The comment in the code reinforces this by saying "just one write attempt may fail" Unfortunately these failures sometimes end up causing an "-EILSEQ" back to the core which triggers a retuning of the SDIO card and that blocks all traffic to the card until it's done. Let's disable retuning around the commands we expect might fail. Commit notes: Patches #2 - #5 will go through Ulf's tree. This patch is still lacking Kalle Valo's Ack, which should probably be received before landing in Ulf's tree. END Fixes: bd11e8bd03ca ("mmc: core: Flag re-tuning is needed on CRC errors") Cc: stable@vger.kernel.org Signed-off-by: Douglas Anderson Acked-by: Adrian Hunter Reviewed-by: Arend van Spriel --- Changes in v5: None Changes in v4: - Adjust to API rename (Adrian, Ulf). Changes in v3: - Expect errors for all of brcmf_sdio_kso_control() (Adrian). Changes in v2: None drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c index 4a750838d8cd..ee76593259a7 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c @@ -667,6 +667,8 @@ brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on) brcmf_dbg(TRACE, "Enter: on=%d\n", on); + sdio_retune_crc_disable(bus->sdiodev->func1); + wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT); /* 1st KSO write goes to AOS wake up core if device is asleep */ brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, wr_val, &err); @@ -727,6 +729,8 @@ brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on) if (try_cnt > MAX_KSO_ATTEMPTS) brcmf_err("max tries: rd_val=0x%x err=%d\n", rd_val, err); + sdio_retune_crc_enable(bus->sdiodev->func1); + return err; } From patchwork Mon Jun 17 17:56:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 10999905 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8012C924 for ; Mon, 17 Jun 2019 17:59:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 74FC72898D for ; Mon, 17 Jun 2019 17:59:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 68FA7289C5; Mon, 17 Jun 2019 17:59:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E11B52898D for ; 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bh=gukKhFSULA/cUvkTjo5/+HGI1qG1vr2u7fmWrwDOvpo=; b=txM11GXxMn7c6vaPIPNAtensmTcwfY1zZtLQ+L50xyzVfcRTPsCpAzKpWcnExhyeOk ALLTSzdzeL8hGiJKEBRO6oFYcr8WtNCHQIuawcqGDsCFoQmem8rfscwlqSJxkr8Ewo9I Y3PvItAWEdE1nilwQDPd6HfYJfao9LMLXPYy8IqcopIdbqSnlGyn1wxjvuSma8Z4SJhO gwTDyTGdvn/7i0XbRr4WcQpf4Fe0RL0fPO31QasWVqfWFIapny/11+ggkGBVlVFZwPQV Gi8WSNISNuaRH9cHFH6BwvVU7ITVubGpkB3JP+Avggv4h0uOKQY7Xqb7NVb9sDwlGq5d 3rxw== X-Gm-Message-State: APjAAAUK78xgvx+gp9t4v011q6GGbaiEBqnvnF1kxdyMguJ3GDrxLx0x KzoUxdkTjAy87gkNgTn3PMzANA== X-Google-Smtp-Source: APXvYqzdCSj0uI6G5zQQeqkog1Napf/2heNE90tChRbx7D/xUVbfnn1JUIW8D1+k8m93FMtgdBP5aw== X-Received: by 2002:a62:1b85:: with SMTP id b127mr115821200pfb.165.1560794353481; Mon, 17 Jun 2019 10:59:13 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:24fa:e766:52c9:e3b2]) by smtp.gmail.com with ESMTPSA id q1sm15145809pfn.178.2019.06.17.10.59.09 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 17 Jun 2019 10:59:11 -0700 (PDT) From: Douglas Anderson To: Ulf Hansson , Kalle Valo , Adrian Hunter , Arend van Spriel Cc: brcm80211-dev-list.pdl@broadcom.com, linux-rockchip@lists.infradead.org, Double Lo , briannorris@chromium.org, linux-wireless@vger.kernel.org, Naveen Gupta , Madhan Mohan R , mka@chromium.org, Wright Feng , Chi-Hsien Lin , netdev@vger.kernel.org, brcm80211-dev-list@cypress.com, Douglas Anderson , stable@vger.kernel.org, Allison Randal , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Greg Kroah-Hartman Subject: [PATCH v5 4/5] mmc: core: Add sdio_retune_hold_now() and sdio_retune_release() Date: Mon, 17 Jun 2019 10:56:52 -0700 Message-Id: <20190617175653.21756-5-dianders@chromium.org> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog In-Reply-To: <20190617175653.21756-1-dianders@chromium.org> References: <20190617175653.21756-1-dianders@chromium.org> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We want SDIO drivers to be able to temporarily stop retuning when the driver knows that the SDIO card is not in a state where retuning will work (maybe because the card is asleep). We'll move the relevant functions to a place where drivers can call them. Cc: stable@vger.kernel.org Signed-off-by: Douglas Anderson Acked-by: Adrian Hunter --- Patches #2 - #5 will go through Ulf's tree. I've CCed stable@ here without a version tag. As per Adrian Hunter this patch applies cleanly to 4.18+ so that would be an easy first target. However, if someone were so inclined they could provide further backports. As per Adrian [1] the root problem has existed for ~4 years. [1] https://lkml.kernel.org/r/4f39e152-04ba-a64e-985a-df93e6d15ff8@intel.com Changes in v5: None Changes in v4: - Moved retune hold/release to SDIO API (Adrian). Changes in v3: - ("mmc: core: Export mmc_retune_hold_now() mmc_retune_release()") new for v3. Changes in v2: None drivers/mmc/core/sdio_io.c | 40 +++++++++++++++++++++++++++++++++++ include/linux/mmc/sdio_func.h | 3 +++ 2 files changed, 43 insertions(+) diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c index 0acb1a29c968..2ba00acf64e6 100644 --- a/drivers/mmc/core/sdio_io.c +++ b/drivers/mmc/core/sdio_io.c @@ -15,6 +15,7 @@ #include "sdio_ops.h" #include "core.h" #include "card.h" +#include "host.h" /** * sdio_claim_host - exclusively claim a bus for a certain SDIO function @@ -771,3 +772,42 @@ void sdio_retune_crc_enable(struct sdio_func *func) func->card->host->retune_crc_disable = false; } EXPORT_SYMBOL_GPL(sdio_retune_crc_enable); + +/** + * sdio_retune_hold_now - start deferring retuning requests till release + * @func: SDIO function attached to host + * + * This function can be called if it's currently a bad time to do + * a retune of the SDIO card. Retune requests made during this time + * will be held and we'll actually do the retune sometime after the + * release. + * + * This function could be useful if an SDIO card is in a power state + * where it can respond to a small subset of commands that doesn't + * include the retuning command. Care should be taken when using + * this function since (presumably) the retuning request we might be + * deferring was made for a good reason. + * + * This function should be called while the host is claimed. + */ +void sdio_retune_hold_now(struct sdio_func *func) +{ + mmc_retune_hold_now(func->card->host); +} +EXPORT_SYMBOL_GPL(sdio_retune_hold_now); + +/** + * sdio_retune_release - signal that it's OK to retune now + * @func: SDIO function attached to host + * + * This is the complement to sdio_retune_hold_now(). Calling this + * function won't make a retune happen right away but will allow + * them to be scheduled normally. + * + * This function should be called while the host is claimed. + */ +void sdio_retune_release(struct sdio_func *func) +{ + mmc_retune_release(func->card->host); +} +EXPORT_SYMBOL_GPL(sdio_retune_release); diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h index 4820e6d09dac..5a177f7a83c3 100644 --- a/include/linux/mmc/sdio_func.h +++ b/include/linux/mmc/sdio_func.h @@ -170,4 +170,7 @@ extern int sdio_set_host_pm_flags(struct sdio_func *func, mmc_pm_flag_t flags); extern void sdio_retune_crc_disable(struct sdio_func *func); extern void sdio_retune_crc_enable(struct sdio_func *func); +extern void sdio_retune_hold_now(struct sdio_func *func); +extern void sdio_retune_release(struct sdio_func *func); + #endif /* LINUX_MMC_SDIO_FUNC_H */ From patchwork Mon Jun 17 17:56:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 10999909 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BB7CB924 for ; Mon, 17 Jun 2019 17:59:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B08802898D for ; Mon, 17 Jun 2019 17:59:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A4492289C5; Mon, 17 Jun 2019 17:59:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1C3992898D for ; Mon, 17 Jun 2019 17:59:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728762AbfFQR7V (ORCPT ); Mon, 17 Jun 2019 13:59:21 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:36901 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728754AbfFQR7U (ORCPT ); Mon, 17 Jun 2019 13:59:20 -0400 Received: by mail-pf1-f195.google.com with SMTP id 19so6098317pfa.4 for ; Mon, 17 Jun 2019 10:59:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=FlnZzdiFf1S0YMLoCTFEyV12ust5Dpo7bSpHKMU0s0k=; b=VIWj2CuRQEFDLQTpFrEiwh7JmnmIdikL7iboXsKITUDu17jDFvklPt+TErOhzcT4hL M45V1hxQGm9U+GrK+lQYDYIj2Ak6M6/DRUgQHo+Eh2Be+W6dF0MnnCpH29uTjmn+fKMv tP1d85wAvCnpc6uw+HsZKe4wc8XeCeeqZFD8c= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=FlnZzdiFf1S0YMLoCTFEyV12ust5Dpo7bSpHKMU0s0k=; b=glAxAfPBm0vkwIQHx4wn3faT4jxYzraxkSjwV3X1caBdlvHibzvbTzCjCgQewN9vLm ++Gwpf9W2oa2p6sLj/VrXrVoVbPZ8yAQjVu5+B/tYqVb0Bscbfapmt7x9N0M8sx01mid b7Qq4ljdAbwT/EcnwQ9WsJpPkCvT60OXGcKyU/BjjJSEzpySpr0bow5ZXz8bni8+pr8M M5cvacMTeKhz2XgulYwKvqSCqGa3edKbUINxcmyIkgyeVtp6z1m7SNm4TeVBHfUA9Cw9 yE9rPLzzmFtFGSB6RCvEcdAzKO7s20U0yRkYmlzcDVdtqwX6sfNUNE+qP5g1VWUiBQr6 n1Bg== X-Gm-Message-State: APjAAAXWrlGlGaAT1mzFyQ1wk/fdR8h30CSnrM1e/FafGhrGy9q/CMZc 1Ow1x2uKtlldrJ9LHCfNpL603w== X-Google-Smtp-Source: APXvYqyaVs3fvyMpOLZjM3c8dSSZ0GNGbc2/XbFy4Qlb/yNERuegnQR6T/3bb+Lh0yT+fdVq5jr3Gw== X-Received: by 2002:a62:b40f:: with SMTP id h15mr107121375pfn.57.1560794358391; Mon, 17 Jun 2019 10:59:18 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:24fa:e766:52c9:e3b2]) by smtp.gmail.com with ESMTPSA id q1sm15145809pfn.178.2019.06.17.10.59.14 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 17 Jun 2019 10:59:16 -0700 (PDT) From: Douglas Anderson To: Ulf Hansson , Kalle Valo , Adrian Hunter , Arend van Spriel Cc: brcm80211-dev-list.pdl@broadcom.com, linux-rockchip@lists.infradead.org, Double Lo , briannorris@chromium.org, linux-wireless@vger.kernel.org, Naveen Gupta , Madhan Mohan R , mka@chromium.org, Wright Feng , Chi-Hsien Lin , netdev@vger.kernel.org, brcm80211-dev-list@cypress.com, Douglas Anderson , stable@vger.kernel.org, Franky Lin , linux-kernel@vger.kernel.org, Hante Meuleman , Ondrej Jirman , YueHaibing , "David S. Miller" Subject: [PATCH v5 5/5] brcmfmac: sdio: Don't tune while the card is off Date: Mon, 17 Jun 2019 10:56:53 -0700 Message-Id: <20190617175653.21756-6-dianders@chromium.org> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog In-Reply-To: <20190617175653.21756-1-dianders@chromium.org> References: <20190617175653.21756-1-dianders@chromium.org> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When Broadcom SDIO cards are idled they go to sleep and a whole separate subsystem takes over their SDIO communication. This is the Always-On-Subsystem (AOS) and it can't handle tuning requests. Specifically, as tested on rk3288-veyron-minnie (which reports having BCM4354/1 in dmesg), if I force a retune in brcmf_sdio_kso_control() when "on = 1" (aka we're transition from sleep to wake) by whacking: bus->sdiodev->func1->card->host->need_retune = 1 ...then I can often see tuning fail. In this case dw_mmc reports "All phases bad!"). Note that I don't get 100% failure, presumably because sometimes the card itself has already transitioned away from the AOS itself by the time we try to wake it up. If I force retuning when "on = 0" (AKA force retuning right before sending the command to go to sleep) then retuning is always OK. NOTE: we need _both_ this patch and the patch to avoid triggering tuning due to CRC errors in the sleep/wake transition, AKA ("brcmfmac: sdio: Disable auto-tuning around commands expected to fail"). Though both patches handle issues with Broadcom's AOS, the problems are distinct: 1. We want to defer (but not ignore) asynchronous (like timer-requested) tuning requests till the card is awake. However, we want to ignore CRC errors during the transition, we don't want to queue deferred tuning request. 2. You could imagine that the AOS could implement retuning but we could still get errors while transitioning in and out of the AOS. Similarly you could imagine a seamless transition into and out of the AOS (with no CRC errors) even if the AOS couldn't handle tuning. ALSO NOTE: presumably there is never a desperate need to retune in order to wake up the card, since doing so is impossible. Luckily the only way the card can get into sleep state is if we had a good enough tuning to send it the command to put it into sleep, so presumably that "good enough" tuning is enough to wake us up, at least with a few retries. Cc: stable@vger.kernel.org Signed-off-by: Douglas Anderson Acked-by: Adrian Hunter Reviewed-by: Arend van Spriel --- Patches #2 - #5 will go through Ulf's tree. This patch is still lacking Kalle Valo's Ack, which should probably be received before landing in Ulf's tree. I've CCed stable@ here without a version tag. As per Adrian Hunter this patch applies cleanly to 4.18+ so that would be an easy first target. However, if someone were so inclined they could provide further backports. As per Adrian [1] the root problem has existed for ~4 years. [1] https://lkml.kernel.org/r/4f39e152-04ba-a64e-985a-df93e6d15ff8@intel.com Changes in v5: - Rewording of "sleep command" in commit message (Arend). Changes in v4: - Adjust to API rename (Adrian). Changes in v3: - ("brcmfmac: sdio: Don't tune while the card is off") new for v3. Changes in v2: None drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c index ee76593259a7..629140b6d7e2 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c @@ -669,6 +669,10 @@ brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on) sdio_retune_crc_disable(bus->sdiodev->func1); + /* Cannot re-tune if device is asleep; defer till we're awake */ + if (on) + sdio_retune_hold_now(bus->sdiodev->func1); + wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT); /* 1st KSO write goes to AOS wake up core if device is asleep */ brcmf_sdiod_writeb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR, wr_val, &err); @@ -729,6 +733,9 @@ brcmf_sdio_kso_control(struct brcmf_sdio *bus, bool on) if (try_cnt > MAX_KSO_ATTEMPTS) brcmf_err("max tries: rd_val=0x%x err=%d\n", rd_val, err); + if (on) + sdio_retune_release(bus->sdiodev->func1); + sdio_retune_crc_enable(bus->sdiodev->func1); return err;