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8mT2Eh9SkH+YVOmaKsajgZgrBxA7fWmGoxXswEVxJIFj3vW7yNc0C5HaUdYa5iGOMs4kg2ht4s7yy7NRQuh7BifWjo6BQ6k4S1H+6axZucxhSV1L6zN9d+lr3Xo/vy1unzA== Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" All fixes in the UFS driver. The big contributor to the diffstats is the Intel controller S0ix/S3 fix which has to special case the suspend/resume patch for intel controllers in ufshcd-pci.c The patch is available here: git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git scsi-fixes The short changelog is: Adrian Hunter (4): scsi: ufs: core: Fix invalid probe error return value scsi: ufs: ufs-pci: Set UFSHCD_QUIRK_PERFORM_LINK_STARTUP_ONCE for In= tel ADL scsi: ufs: core: Add a quirk to suppress link_startup_again scsi: ufs: ufs-pci: Fix S0ix/S3 for Intel controllers Bart Van Assche (3): scsi: ufs: core: Revert "Make HID attributes visible" scsi: ufs: core: Reduce link startup failure logging scsi: ufs: core: Fix a race condition related to the "hid" attribute = group Nitin Rawat (1): scsi: ufs: ufs-qcom: Fix UFS OCP issue during UFS power down (PC=3D3) And the diffstat: drivers/ufs/core/ufs-sysfs.c | 2 +- drivers/ufs/core/ufs-sysfs.h | 1 - drivers/ufs/core/ufshcd.c | 17 ++++------- drivers/ufs/host/ufs-qcom.c | 15 +++++++++- drivers/ufs/host/ufshcd-pci.c | 70 +++++++++++++++++++++++++++++++++++++++= ++-- include/ufs/ufshcd.h | 7 +++++ 6 files changed, 95 insertions(+), 17 deletions(-) With full diff below. Regards, James --- diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c index c040afc6668e..0086816b27cd 100644 --- a/drivers/ufs/core/ufs-sysfs.c +++ b/drivers/ufs/core/ufs-sysfs.c @@ -1949,7 +1949,7 @@ static umode_t ufs_sysfs_hid_is_visible(struct kobjec= t *kobj, return hba->dev_info.hid_sup ? attr->mode : 0; } =20 -const struct attribute_group ufs_sysfs_hid_group =3D { +static const struct attribute_group ufs_sysfs_hid_group =3D { .name =3D "hid", .attrs =3D ufs_sysfs_hid, .is_visible =3D ufs_sysfs_hid_is_visible, diff --git a/drivers/ufs/core/ufs-sysfs.h b/drivers/ufs/core/ufs-sysfs.h index 6efb82a082fd..8d94af3b8077 100644 --- a/drivers/ufs/core/ufs-sysfs.h +++ b/drivers/ufs/core/ufs-sysfs.h @@ -14,6 +14,5 @@ void ufs_sysfs_remove_nodes(struct device *dev); =20 extern const struct attribute_group ufs_sysfs_unit_descriptor_group; extern const struct attribute_group ufs_sysfs_lun_attributes_group; -extern const struct attribute_group ufs_sysfs_hid_group; =20 #endif diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 9ca27de4767a..d6a060a72461 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -5066,7 +5066,8 @@ static int ufshcd_link_startup(struct ufs_hba *hba) * If UFS device isn't active then we will have to issue link startup * 2 times to make sure the device state move to active. */ - if (!ufshcd_is_ufs_dev_active(hba)) + if (!(hba->quirks & UFSHCD_QUIRK_PERFORM_LINK_STARTUP_ONCE) && + !ufshcd_is_ufs_dev_active(hba)) link_startup_again =3D true; =20 link_startup: @@ -5131,12 +5132,8 @@ static int ufshcd_link_startup(struct ufs_hba *hba) ufshcd_readl(hba, REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER); ret =3D ufshcd_make_hba_operational(hba); out: - if (ret) { + if (ret) dev_err(hba->dev, "link startup failed %d\n", ret); - ufshcd_print_host_state(hba); - ufshcd_print_pwr_info(hba); - ufshcd_print_evt_hist(hba); - } return ret; } =20 @@ -8503,8 +8500,6 @@ static int ufs_get_device_desc(struct ufs_hba *hba) DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP) & UFS_DEV_HID_SUPPORT; =20 - sysfs_update_group(&hba->dev->kobj, &ufs_sysfs_hid_group); - model_index =3D desc_buf[DEVICE_DESC_PARAM_PRDCT_NAME]; =20 err =3D ufshcd_read_string_desc(hba, model_index, @@ -10661,7 +10656,7 @@ static int ufshcd_add_scsi_host(struct ufs_hba *hba) * @mmio_base: base register address * @irq: Interrupt line of device * - * Return: 0 on success, non-zero value on failure. + * Return: 0 on success; < 0 on failure. */ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int= irq) { @@ -10891,8 +10886,8 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *= mmio_base, unsigned int irq) if (err) goto out_disable; =20 - async_schedule(ufshcd_async_scan, hba); ufs_sysfs_add_nodes(hba->dev); + async_schedule(ufshcd_async_scan, hba); =20 device_enable_async_suspend(dev); ufshcd_pm_qos_init(hba); @@ -10902,7 +10897,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *= mmio_base, unsigned int irq) hba->is_irq_enabled =3D false; ufshcd_hba_exit(hba); out_error: - return err; + return err > 0 ? -EIO : err; } EXPORT_SYMBOL_GPL(ufshcd_init); =20 diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 3e83dc51d538..eba0e6617483 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -740,8 +740,21 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum = ufs_pm_op pm_op, =20 =20 /* reset the connected UFS device during power down */ - if (ufs_qcom_is_link_off(hba) && host->device_reset) + if (ufs_qcom_is_link_off(hba) && host->device_reset) { ufs_qcom_device_reset_ctrl(hba, true); + /* + * After sending the SSU command, asserting the rst_n + * line causes the device firmware to wake up and + * execute its reset routine. + * + * During this process, the device may draw current + * beyond the permissible limit for low-power mode (LPM). + * A 10ms delay, based on experimental observations, + * allows the UFS device to complete its hardware reset + * before transitioning the power rail to LPM. + */ + usleep_range(10000, 11000); + } =20 return ufs_qcom_ice_suspend(host); } diff --git a/drivers/ufs/host/ufshcd-pci.c b/drivers/ufs/host/ufshcd-pci.c index b87e03777395..5f65dfad1a71 100644 --- a/drivers/ufs/host/ufshcd-pci.c +++ b/drivers/ufs/host/ufshcd-pci.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -31,6 +32,7 @@ struct intel_host { u32 dsm_fns; u32 active_ltr; u32 idle_ltr; + int saved_spm_lvl; struct dentry *debugfs_root; struct gpio_desc *reset_gpio; }; @@ -347,6 +349,7 @@ static int ufs_intel_common_init(struct ufs_hba *hba) host =3D devm_kzalloc(hba->dev, sizeof(*host), GFP_KERNEL); if (!host) return -ENOMEM; + host->saved_spm_lvl =3D -1; ufshcd_set_variant(hba, host); intel_dsm_init(host, hba->dev); if (INTEL_DSM_SUPPORTED(host, RESET)) { @@ -425,7 +428,8 @@ static int ufs_intel_lkf_init(struct ufs_hba *hba) static int ufs_intel_adl_init(struct ufs_hba *hba) { hba->nop_out_timeout =3D 200; - hba->quirks |=3D UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8; + hba->quirks |=3D UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8 | + UFSHCD_QUIRK_PERFORM_LINK_STARTUP_ONCE; hba->caps |=3D UFSHCD_CAP_WB_EN; return ufs_intel_common_init(hba); } @@ -538,6 +542,66 @@ static int ufshcd_pci_restore(struct device *dev) =20 return ufshcd_system_resume(dev); } + +static int ufs_intel_suspend_prepare(struct device *dev) +{ + struct ufs_hba *hba =3D dev_get_drvdata(dev); + struct intel_host *host =3D ufshcd_get_variant(hba); + int err; + + /* + * Only s2idle (S0ix) retains link state. Force power-off + * (UFS_PM_LVL_5) for any other case. + */ + if (pm_suspend_target_state !=3D PM_SUSPEND_TO_IDLE && hba->spm_lvl < UFS= _PM_LVL_5) { + host->saved_spm_lvl =3D hba->spm_lvl; + hba->spm_lvl =3D UFS_PM_LVL_5; + } + + err =3D ufshcd_suspend_prepare(dev); + + if (err < 0 && host->saved_spm_lvl !=3D -1) { + hba->spm_lvl =3D host->saved_spm_lvl; + host->saved_spm_lvl =3D -1; + } + + return err; +} + +static void ufs_intel_resume_complete(struct device *dev) +{ + struct ufs_hba *hba =3D dev_get_drvdata(dev); + struct intel_host *host =3D ufshcd_get_variant(hba); + + ufshcd_resume_complete(dev); + + if (host->saved_spm_lvl !=3D -1) { + hba->spm_lvl =3D host->saved_spm_lvl; + host->saved_spm_lvl =3D -1; + } +} + +static int ufshcd_pci_suspend_prepare(struct device *dev) +{ + struct ufs_hba *hba =3D dev_get_drvdata(dev); + + if (!strcmp(hba->vops->name, "intel-pci")) + return ufs_intel_suspend_prepare(dev); + + return ufshcd_suspend_prepare(dev); +} + +static void ufshcd_pci_resume_complete(struct device *dev) +{ + struct ufs_hba *hba =3D dev_get_drvdata(dev); + + if (!strcmp(hba->vops->name, "intel-pci")) { + ufs_intel_resume_complete(dev); + return; + } + + ufshcd_resume_complete(dev); +} #endif =20 /** @@ -611,8 +675,8 @@ static const struct dev_pm_ops ufshcd_pci_pm_ops =3D { .thaw =3D ufshcd_system_resume, .poweroff =3D ufshcd_system_suspend, .restore =3D ufshcd_pci_restore, - .prepare =3D ufshcd_suspend_prepare, - .complete =3D ufshcd_resume_complete, + .prepare =3D ufshcd_pci_suspend_prepare, + .complete =3D ufshcd_pci_resume_complete, #endif }; =20 diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index 9425cfd9d00e..0f95576bf1f6 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -688,6 +688,13 @@ enum ufshcd_quirks { * single doorbell mode. */ UFSHCD_QUIRK_BROKEN_LSDBS_CAP =3D 1 << 25, + + /* + * This quirk indicates that DME_LINKSTARTUP should not be issued a 2nd + * time (refer link_startup_again) after the 1st time was successful, + * because it causes link startup to become unreliable. + */ + UFSHCD_QUIRK_PERFORM_LINK_STARTUP_ONCE =3D 1 << 26, }; =20 enum ufshcd_caps {