From patchwork Wed Jul 12 10:32:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 702464 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F282EB64D9 for ; Wed, 12 Jul 2023 10:36:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231237AbjGLKgv (ORCPT ); Wed, 12 Jul 2023 06:36:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232039AbjGLKge (ORCPT ); Wed, 12 Jul 2023 06:36:34 -0400 Received: from mail-oi1-x232.google.com (mail-oi1-x232.google.com [IPv6:2607:f8b0:4864:20::232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B8C726A5 for ; Wed, 12 Jul 2023 03:36:12 -0700 (PDT) Received: by mail-oi1-x232.google.com with SMTP id 5614622812f47-3a36b309524so5840724b6e.3 for ; Wed, 12 Jul 2023 03:36:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1689158164; x=1691750164; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=9lRntyMiDXIrlEPonKFcypmd70adqqA/4SVPD5U+6Pw=; b=csz5o2z7SM6JsEw1selBM2JSMArZw2Kj1XqTd5Dx6K1tJ55Cl0LHwyqbCboknpyqYx 1t7x0+1/Z8TKLY2VrTg0dJbGFa0o3Ou/Yf7v63ygHBuMX9OWYs5HPNBSBBgfgGfpMATU /Go6S0a6pxh5+Lm7oCmtW9ZNEIbMEjTvk3aT7xQ6zPIldAc5AB2KwFz966fUO1Y0s/6z bb+93zdyxLNvPtmL/BfdZ37pSRhN/SuUYOxZ3OTVR3d0vojIaWsKr7soHMY0MIrXhPV0 zAyInWURma9PkrqsV+1cJmh0dVqkOUq9FITQpXGL/ocMU5oGYBpBIhJckxQcKghjGl1e 66lg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689158164; x=1691750164; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=9lRntyMiDXIrlEPonKFcypmd70adqqA/4SVPD5U+6Pw=; b=ChiVIPjzBwaDf0+v0wMVbo/bVPGGKzZ9y1j8plB9zCXAop0qcT6Jy1icHeU6qJhQs2 cxJlO5Rn2zX79IEtSIC1Y0ecFXJX5lTAQUc2Ta6Iqt/+Xdi70XIcAX6gjuB6AoKwjMVT 1uZPCzIw2GvjGQbgCRUnJ6nVoQBr8c1CoXhsxf/LnrE4W/XE8rFmlfgZSuQ5qenDd1IR vWn3PfNYTxJyXIZMK4ttSczfFNbMBiszYjKNcqJON2K2AUrMwMdL/8TOA0BkNxTw5Ja7 VKff2qbCRCkikvYiLOQLU5twNwQ+4JBLLvMGTIi3MEfRsIw6MC7fujCezhkH3md/Y5G2 AMyQ== X-Gm-Message-State: ABy/qLatvGJbQ3EfqB0e0bgrECa7V3kVTKm3jJf4eowXKWrcEGpkVOXX ZgaWwPurfizOG/1/0vktglU2 X-Google-Smtp-Source: APBJJlHKe7eMfEyD0mRmZ1k5USSgGzYv4OcdOx42JMeVF0VlQQBVtsWt9CrzDl4gR8yV4RHdVY1W4A== X-Received: by 2002:a05:6808:54b:b0:3a3:7248:252a with SMTP id i11-20020a056808054b00b003a37248252amr24110902oig.0.1689158164305; Wed, 12 Jul 2023 03:36:04 -0700 (PDT) Received: from localhost.localdomain ([117.207.27.131]) by smtp.gmail.com with ESMTPSA id k15-20020aa790cf000000b00666b3706be6sm3247860pfk.107.2023.07.12.03.35.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Jul 2023 03:36:03 -0700 (PDT) From: Manivannan Sadhasivam To: vireshk@kernel.org, nm@ti.com, sboyd@kernel.org, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, andersson@kernel.org, konrad.dybcio@linaro.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, quic_asutoshd@quicinc.com, quic_cang@quicinc.com, quic_nitirawa@quicinc.com, quic_narepall@quicinc.com, quic_bhaskarv@quicinc.com, quic_richardp@quicinc.com, quic_nguyenb@quicinc.com, quic_ziqichen@quicinc.com, bmasney@redhat.com, krzysztof.kozlowski@linaro.org, Manivannan Sadhasivam Subject: [PATCH 13/13] scsi: ufs: qcom: Add support for scaling interconnects Date: Wed, 12 Jul 2023 16:02:12 +0530 Message-Id: <20230712103213.101770-18-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230712103213.101770-1-manivannan.sadhasivam@linaro.org> References: <20230712103213.101770-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Qcom SoCs require scaling the interconnect paths for proper working of the peripherals connected through interconnects. Even for accessing the UFS controller, someone should setup the interconnect paths. So far, the bootloaders used to setup the interconnect paths before booting linux as they need to access the UFS storage for things like fetching boot firmware. But with the advent of multi boot options, bootloader nowadays like in SA8540p SoC do not setup the interconnect paths at all. So trying to configure UFS in the absence of the interconnect path configuration, results in boot crash. To fix this issue and also to dynamically scale the interconnects (UFS-DDR and CPU-UFS), interconnect API support is added to the Qcom UFS driver. With this support, the interconnect paths are scaled dynamically based on the gear configuration. During the early stage of ufs_qcom_init(), ufs_qcom_icc_init() will setup the paths to max bandwidth to allow configuring the UFS registers. Touching the registers without configuring the icc paths would result in a crash. However, we don't really need to set max vote for the icc paths as any minimal vote would suffice. But the max value would allow initialization to be done faster. After init, the bandwidth will get updated using ufs_qcom_icc_update_bw() based on the gear and lane configuration. The bandwidth values defined in ufs_qcom_bw_table struct are taken from Qcom downstream vendor devicetree source and are calculated as per the UFS3.1 Spec, Section 6.4.1, HS Gear Rates. So it is fixed across platforms. Cc: Brian Masney Signed-off-by: Manivannan Sadhasivam --- drivers/ufs/host/ufs-qcom.c | 131 +++++++++++++++++++++++++++++++++++- drivers/ufs/host/ufs-qcom.h | 3 + 2 files changed, 133 insertions(+), 1 deletion(-) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 8d6fd4c3324f..8a3132d45a65 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -46,6 +47,49 @@ enum { TSTBUS_MAX, }; +#define QCOM_UFS_MAX_GEAR 4 +#define QCOM_UFS_MAX_LANE 2 + +enum { + MODE_MIN, + MODE_PWM, + MODE_HS_RA, + MODE_HS_RB, + MODE_MAX, +}; + +struct __ufs_qcom_bw_table { + u32 bw1; + u32 bw2; +} ufs_qcom_bw_table[MODE_MAX + 1][QCOM_UFS_MAX_GEAR + 1][QCOM_UFS_MAX_LANE + 1] = { + [MODE_MIN][0][0] = { 0, 0 }, /* Bandwidth values are in KB/s */ + [MODE_PWM][1][1] = { 922, 1000 }, + [MODE_PWM][2][1] = { 1844, 1000 }, + [MODE_PWM][3][1] = { 3688, 1000 }, + [MODE_PWM][4][1] = { 7376, 1000 }, + [MODE_PWM][1][2] = { 1844, 1000 }, + [MODE_PWM][2][2] = { 3688, 1000 }, + [MODE_PWM][3][2] = { 7376, 1000 }, + [MODE_PWM][4][2] = { 14752, 1000 }, + [MODE_HS_RA][1][1] = { 127796, 1000 }, + [MODE_HS_RA][2][1] = { 255591, 1000 }, + [MODE_HS_RA][3][1] = { 1492582, 102400 }, + [MODE_HS_RA][4][1] = { 2915200, 204800 }, + [MODE_HS_RA][1][2] = { 255591, 1000 }, + [MODE_HS_RA][2][2] = { 511181, 1000 }, + [MODE_HS_RA][3][2] = { 1492582, 204800 }, + [MODE_HS_RA][4][2] = { 2915200, 409600 }, + [MODE_HS_RB][1][1] = { 149422, 1000 }, + [MODE_HS_RB][2][1] = { 298189, 1000 }, + [MODE_HS_RB][3][1] = { 1492582, 102400 }, + [MODE_HS_RB][4][1] = { 2915200, 204800 }, + [MODE_HS_RB][1][2] = { 298189, 1000 }, + [MODE_HS_RB][2][2] = { 596378, 1000 }, + [MODE_HS_RB][3][2] = { 1492582, 204800 }, + [MODE_HS_RB][4][2] = { 2915200, 409600 }, + [MODE_MAX][0][0] = { 7643136, 307200 }, +}; + static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS]; static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host); @@ -789,6 +833,51 @@ static void ufs_qcom_dev_ref_clk_ctrl(struct ufs_qcom_host *host, bool enable) } } +static int ufs_qcom_icc_set_bw(struct ufs_qcom_host *host, u32 bw1, u32 bw2) +{ + struct device *dev = host->hba->dev; + int ret; + + ret = icc_set_bw(host->icc_ddr, 0, bw1); + if (ret < 0) { + dev_err(dev, "failed to set bandwidth request: %d\n", ret); + return ret; + } + + ret = icc_set_bw(host->icc_cpu, 0, bw2); + if (ret < 0) { + dev_err(dev, "failed to set bandwidth request: %d\n", ret); + return ret; + } + + return 0; +} + +static struct __ufs_qcom_bw_table ufs_qcom_get_bw_table(struct ufs_qcom_host *host) +{ + struct ufs_pa_layer_attr *p = &host->dev_req_params; + int gear = max_t(u32, p->gear_rx, p->gear_tx); + int lane = max_t(u32, p->lane_rx, p->lane_tx); + + if (ufshcd_is_hs_mode(p)) { + if (p->hs_rate == PA_HS_MODE_B) + return ufs_qcom_bw_table[MODE_HS_RB][gear][lane]; + else + return ufs_qcom_bw_table[MODE_HS_RA][gear][lane]; + } else { + return ufs_qcom_bw_table[MODE_PWM][gear][lane]; + } +} + +static int ufs_qcom_icc_update_bw(struct ufs_qcom_host *host) +{ + struct __ufs_qcom_bw_table bw_table; + + bw_table = ufs_qcom_get_bw_table(host); + + return ufs_qcom_icc_set_bw(host, bw_table.bw1, bw_table.bw2); +} + static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, enum ufs_notify_change_status status, struct ufs_pa_layer_attr *dev_max_params, @@ -852,6 +941,8 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, memcpy(&host->dev_req_params, dev_req_params, sizeof(*dev_req_params)); + ufs_qcom_icc_update_bw(host); + /* disable the device ref clock if entered PWM mode */ if (ufshcd_is_hs_mode(&hba->pwr_info) && !ufshcd_is_hs_mode(dev_req_params)) @@ -981,7 +1072,9 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, switch (status) { case PRE_CHANGE: - if (!on) { + if (on) { + ufs_qcom_icc_update_bw(host); + } else { if (!ufs_qcom_is_link_active(hba)) { /* disable device ref_clk */ ufs_qcom_dev_ref_clk_ctrl(host, false); @@ -993,6 +1086,9 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, /* enable the device ref clock for HS mode*/ if (ufshcd_is_hs_mode(&hba->pwr_info)) ufs_qcom_dev_ref_clk_ctrl(host, true); + } else { + ufs_qcom_icc_set_bw(host, ufs_qcom_bw_table[MODE_MIN][0][0].bw1, + ufs_qcom_bw_table[MODE_MIN][0][0].bw2); } break; } @@ -1031,6 +1127,34 @@ static const struct reset_control_ops ufs_qcom_reset_ops = { .deassert = ufs_qcom_reset_deassert, }; +static int ufs_qcom_icc_init(struct ufs_qcom_host *host) +{ + struct device *dev = host->hba->dev; + int ret; + + host->icc_ddr = devm_of_icc_get(dev, "ufs-ddr"); + if (IS_ERR(host->icc_ddr)) + return dev_err_probe(dev, PTR_ERR(host->icc_ddr), + "failed to acquire interconnect path\n"); + + host->icc_cpu = devm_of_icc_get(dev, "cpu-ufs"); + if (IS_ERR(host->icc_cpu)) + return dev_err_probe(dev, PTR_ERR(host->icc_cpu), + "failed to acquire interconnect path\n"); + + /* + * Set Maximum bandwidth vote before initializing the UFS controller and + * device. Ideally, a minimal interconnect vote would suffice for the + * initialization, but a max vote would allow faster initialization. + */ + ret = ufs_qcom_icc_set_bw(host, ufs_qcom_bw_table[MODE_MAX][0][0].bw1, + ufs_qcom_bw_table[MODE_MAX][0][0].bw2); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to set bandwidth request\n"); + + return 0; +} + /** * ufs_qcom_init - bind phy with controller * @hba: host controller instance @@ -1085,6 +1209,10 @@ static int ufs_qcom_init(struct ufs_hba *hba) } } + err = ufs_qcom_icc_init(host); + if (err) + goto out_variant_clear; + host->device_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(host->device_reset)) { @@ -1282,6 +1410,7 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, dev_req_params->pwr_rx, dev_req_params->hs_rate, false); + ufs_qcom_icc_update_bw(host); ufshcd_uic_hibern8_exit(hba); } diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 6289ad5a42d0..dc27395ecba1 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -206,6 +206,9 @@ struct ufs_qcom_host { struct clk *tx_l1_sync_clk; bool is_lane_clks_enabled; + struct icc_path *icc_ddr; + struct icc_path *icc_cpu; + #ifdef CONFIG_SCSI_UFS_CRYPTO struct qcom_ice *ice; #endif