From patchwork Mon Jul 8 21:16:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 13727049 Received: from 008.lax.mailroute.net (008.lax.mailroute.net [199.89.1.11]) (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 88A3B14D2A3 for ; Mon, 8 Jul 2024 21:19:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.89.1.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720473568; cv=none; b=j47QotLMjjYxzH2pTo57/gjjPwbbGiqJDVm1QJxFgEINtsP/R6q4poOblt3w5rHPfJcIYRYbGR19yQkgLoAnLE22o49ds7teSRSVkby15WniOd5BgHcSHv2xQP5wgmCpqCsZQq3AWD8nyo19CSTVdblwf18KF252s82iYdlFt9U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720473568; c=relaxed/simple; bh=jjx+GqcSDnE663D3PJ1XAhhSANs3UMkWrQiOwxGVVxE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=i9UA+cwKe/DeyaAAQijSvWRMikP0l7WBs+P7tCLmtF8ddJ5hIRKa9gd8f14g+xIXW2JK3pA5xaFpmdbHG3Jc4/3E2iFKIvOlbnH2k9EGv9yKcAxdeA7QEIC1w5gUsU6Pvk0Dehq8D57EO4ATjglD1vum8whjxvS85RjRzowNb/o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b=Y8g8ctcX; arc=none smtp.client-ip=199.89.1.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b="Y8g8ctcX" Received: from localhost (localhost [127.0.0.1]) by 008.lax.mailroute.net (Postfix) with ESMTP id 4WHxp622cFz6CmM6L; Mon, 8 Jul 2024 21:19:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:mime-version:references:in-reply-to :x-mailer:message-id:date:date:subject:subject:from:from :received:received; s=mr01; t=1720473552; x=1723065553; bh=/f13e zMkTqOft6w0SXyVP9yXp/obffaFESgQ7DPdowU=; b=Y8g8ctcXx5KFvJmQ8D0TC ZqexEkxMcKMDocVuYOVx69z39Y3t/ZFFcXBJQt+AJ1A0XU8jmOMDAgzWvvm2IhcC WCfGhrpk578CO28Xvu7dMCjzXUgM9SjNumfExKNJ0yXLht1M3wblmI8S6FpnedjL ATSkkMffFXUkMvTW5h0VaWrAuo5elWwbOO0akzU9x8wf5gEPtB3hlqFUvJOy6K3I ZIt4Ekgph/slV7mroS9haUlNakoyxzKX5IZoRf+Yn/zg88x5LIGL+nl/vRs/lBGr J+Mu7WwHeQ8DnWkUaa8VrAs4Iy6NxaKQhgKxfKR8Kos+c5LYxPaiftBP3k1iecPI g== X-Virus-Scanned: by MailRoute Received: from 008.lax.mailroute.net ([127.0.0.1]) by localhost (008.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id qit4WRcD33xV; Mon, 8 Jul 2024 21:19:12 +0000 (UTC) Received: from bvanassche.mtv.corp.google.com (unknown [104.132.0.90]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 008.lax.mailroute.net (Postfix) with ESMTPSA id 4WHxnl4rC0z6Cnk9V; Mon, 8 Jul 2024 21:19:07 +0000 (UTC) From: Bart Van Assche To: "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, peter.wang@mediatek.com, manivannan.sadhasivam@linaro.org, Bart Van Assche , "James E.J. Bottomley" , Matthias Brugger , AngeloGioacchino Del Regno , Minwoo Im , Stanley Jhu , ChanWoo Lee , Naomi Chu , Rohit Ner , Yang Li , Avri Altman , Andrew Halaney , Bean Huo , Maramaina Naresh , Akinobu Mita Subject: [PATCH v5 10/10] scsi: ufs: Make .get_hba_mac() optional Date: Mon, 8 Jul 2024 14:16:05 -0700 Message-ID: <20240708211716.2827751-11-bvanassche@acm.org> X-Mailer: git-send-email 2.45.2.803.g4e1b14247a-goog In-Reply-To: <20240708211716.2827751-1-bvanassche@acm.org> References: <20240708211716.2827751-1-bvanassche@acm.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 UFSHCI controllers that are compliant with the UFSHCI 4.0 standard report the maximum number of supported commands in the controller capabilities register. Use that value if .get_hba_mac == NULL. Reviewed-by: Peter Wang Signed-off-by: Bart Van Assche Reviewed-by: Manivannan Sadhasivam --- drivers/ufs/core/ufs-mcq.c | 26 ++++++++++++++++++++------ drivers/ufs/core/ufshcd-priv.h | 1 + drivers/ufs/core/ufshcd.c | 3 ++- include/ufs/ufshcd.h | 4 +++- include/ufs/ufshci.h | 1 + 5 files changed, 27 insertions(+), 8 deletions(-) diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c index ef98c9797d07..70951829192f 100644 --- a/drivers/ufs/core/ufs-mcq.c +++ b/drivers/ufs/core/ufs-mcq.c @@ -138,18 +138,26 @@ EXPORT_SYMBOL_GPL(ufshcd_mcq_queue_cfg_addr); * * MAC - Max. Active Command of the Host Controller (HC) * HC wouldn't send more than this commands to the device. - * It is mandatory to implement get_hba_mac() to enable MCQ mode. * Calculates and adjusts the queue depth based on the depth * supported by the HC and ufs device. */ int ufshcd_mcq_decide_queue_depth(struct ufs_hba *hba) { - int mac = -EOPNOTSUPP; + int mac; - if (!hba->vops || !hba->vops->get_hba_mac) - goto err; - - mac = hba->vops->get_hba_mac(hba); + if (!hba->vops || !hba->vops->get_hba_mac) { + /* + * Extract the maximum number of active transfer tasks value + * from the host controller capabilities register. This value is + * 0-based. + */ + hba->capabilities = + ufshcd_readl(hba, REG_CONTROLLER_CAPABILITIES); + mac = hba->capabilities & MASK_TRANSFER_REQUESTS_SLOTS_MCQ; + mac++; + } else { + mac = hba->vops->get_hba_mac(hba); + } if (mac < 0) goto err; @@ -424,6 +432,12 @@ void ufshcd_mcq_enable(struct ufs_hba *hba) } EXPORT_SYMBOL_GPL(ufshcd_mcq_enable); +void ufshcd_mcq_disable(struct ufs_hba *hba) +{ + ufshcd_rmwl(hba, MCQ_MODE_SELECT, 0, REG_UFS_MEM_CFG); + hba->mcq_enabled = false; +} + void ufshcd_mcq_config_esi(struct ufs_hba *hba, struct msi_msg *msg) { ufshcd_writel(hba, msg->address_lo, REG_UFS_ESILBA); diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h index 88ce93748305..ce36154ce963 100644 --- a/drivers/ufs/core/ufshcd-priv.h +++ b/drivers/ufs/core/ufshcd-priv.h @@ -64,6 +64,7 @@ void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit); void ufshcd_compl_one_cqe(struct ufs_hba *hba, int task_tag, struct cq_entry *cqe); int ufshcd_mcq_init(struct ufs_hba *hba); +void ufshcd_mcq_disable(struct ufs_hba *hba); int ufshcd_mcq_decide_queue_depth(struct ufs_hba *hba); int ufshcd_mcq_memory_alloc(struct ufs_hba *hba); struct ufs_hw_queue *ufshcd_mcq_req_to_hwq(struct ufs_hba *hba, diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 4c2b60dec43f..1ba5668b0700 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -8754,12 +8754,13 @@ static int ufshcd_device_init(struct ufs_hba *hba, bool init_dev_params) if (ret) return ret; if (is_mcq_supported(hba) && !hba->scsi_host_added) { + ufshcd_mcq_enable(hba); ret = ufshcd_alloc_mcq(hba); if (!ret) { ufshcd_config_mcq(hba); - ufshcd_mcq_enable(hba); } else { /* Continue with SDB mode */ + ufshcd_mcq_disable(hba); use_mcq_mode = false; dev_err(hba->dev, "MCQ mode is disabled, err=%d\n", ret); diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index 3eaa8bc7eaea..52b0b10cca50 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -325,7 +325,9 @@ struct ufs_pwr_mode_info { * @event_notify: called to notify important events * @reinit_notify: called to notify reinit of UFSHCD during max gear switch * @mcq_config_resource: called to configure MCQ platform resources - * @get_hba_mac: called to get vendor specific mac value, mandatory for mcq mode + * @get_hba_mac: reports maximum number of outstanding commands supported by + * the controller. Should be implemented for UFSHCI 4.0 or later + * controllers that are not compliant with the UFSHCI 4.0 specification. * @op_runtime_config: called to config Operation and runtime regs Pointers * @get_outstanding_cqs: called to get outstanding completion queues * @config_esi: called to config Event Specific Interrupt diff --git a/include/ufs/ufshci.h b/include/ufs/ufshci.h index 8d0cc73537c6..38fe97971a65 100644 --- a/include/ufs/ufshci.h +++ b/include/ufs/ufshci.h @@ -68,6 +68,7 @@ enum { /* Controller capability masks */ enum { MASK_TRANSFER_REQUESTS_SLOTS_SDB = 0x0000001F, + MASK_TRANSFER_REQUESTS_SLOTS_MCQ = 0x000000FF, MASK_NUMBER_OUTSTANDING_RTT = 0x0000FF00, MASK_TASK_MANAGEMENT_REQUEST_SLOTS = 0x00070000, MASK_EHSLUTRD_SUPPORTED = 0x00400000,