From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 0F949C10F14 for ; Thu, 11 Apr 2019 12:47:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D0F9321852 for ; Thu, 11 Apr 2019 12:47:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726965AbfDKMrq (ORCPT ); Thu, 11 Apr 2019 08:47:46 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:41650 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726884AbfDKMro (ORCPT ); Thu, 11 Apr 2019 08:47:44 -0400 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id C42A1BD3D086657F26F9; Thu, 11 Apr 2019 20:47:29 +0800 (CST) Received: from localhost.localdomain (10.67.212.75) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.408.0; Thu, 11 Apr 2019 20:47:19 +0800 From: John Garry To: , CC: , , , John Garry Subject: [PATCH 3/9] scsi: hisi_sas: Fix for setting the PHY linkrate when disconnected Date: Thu, 11 Apr 2019 20:46:38 +0800 Message-ID: <1554986804-233706-4-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1554986804-233706-1-git-send-email-john.garry@huawei.com> References: <1554986804-233706-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In commit efdcad62e7b8 ("scsi: hisi_sas: Set PHY linkrate when disconnected"), we use the sas_phy_data.enable flag to track whether the PHY was enabled or not, so that we know if we should set the PHY negotiated linkrate at SAS_LINK_RATE_UNKNOWN or SAS_PHY_DISABLED. However, it is not proper to use sas_phy_data.enable, since it is only set when libsas attempts to set the PHY disabled/enabled; hence, it may not even have an initial value. As a solution to this problem, introduce hisi_sas_phy.enable to track whether the PHY is enabled or not, so that we can set the negotiated linkrate properly when the PHY comes down. Signed-off-by: John Garry --- drivers/scsi/hisi_sas/hisi_sas.h | 3 ++ drivers/scsi/hisi_sas/hisi_sas_main.c | 43 ++++++++++++++++++++------ drivers/scsi/hisi_sas/hisi_sas_v1_hw.c | 11 ++----- drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 6 ++-- drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 6 ++-- 5 files changed, 46 insertions(+), 23 deletions(-) diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h index 9bfa9f12d81e..fc87994b5d73 100644 --- a/drivers/scsi/hisi_sas/hisi_sas.h +++ b/drivers/scsi/hisi_sas/hisi_sas.h @@ -170,6 +170,7 @@ struct hisi_sas_phy { u32 code_violation_err_count; enum sas_linkrate minimum_linkrate; enum sas_linkrate maximum_linkrate; + int enable; }; struct hisi_sas_port { @@ -551,6 +552,8 @@ extern int hisi_sas_slave_configure(struct scsi_device *sdev); extern int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time); extern void hisi_sas_scan_start(struct Scsi_Host *shost); extern int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type); +extern void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, + int enable); extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy); extern void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task, diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index e7401e2bea27..d4da537f9a45 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -10,7 +10,6 @@ */ #include "hisi_sas.h" -#include "../libsas/sas_internal.h" #define DRV_NAME "hisi_sas" #define DEV_IS_GONE(dev) \ @@ -171,7 +170,7 @@ void hisi_sas_stop_phys(struct hisi_hba *hisi_hba) int phy_no; for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) - hisi_hba->hw->phy_disable(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 0); } EXPORT_SYMBOL_GPL(hisi_sas_stop_phys); @@ -976,6 +975,30 @@ static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no) timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0); } +/* Wrapper to ensure we track hisi_sas_phy.enable properly */ +void hisi_sas_phy_enable(struct hisi_hba *hisi_hba, int phy_no, int enable) +{ + struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; + struct asd_sas_phy *aphy = &phy->sas_phy; + struct sas_phy *sphy = aphy->phy; + unsigned long flags; + + spin_lock_irqsave(&phy->lock, flags); + + if (enable) { + /* We may have been enabled already; if so, don't touch */ + if (!phy->enable) + sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; + hisi_hba->hw->phy_start(hisi_hba, phy_no); + } else { + sphy->negotiated_linkrate = SAS_PHY_DISABLED; + hisi_hba->hw->phy_disable(hisi_hba, phy_no); + } + phy->enable = enable; + spin_unlock_irqrestore(&phy->lock, flags); +} +EXPORT_SYMBOL_GPL(hisi_sas_phy_enable); + static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy) { struct sas_ha_struct *sas_ha = sas_phy->ha; @@ -1112,10 +1135,10 @@ static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no, sas_phy->phy->maximum_linkrate = max; sas_phy->phy->minimum_linkrate = min; - hisi_hba->hw->phy_disable(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 0); msleep(100); hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r); - hisi_hba->hw->phy_start(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 1); return 0; } @@ -1133,13 +1156,13 @@ static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func, break; case PHY_FUNC_LINK_RESET: - hisi_hba->hw->phy_disable(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 0); msleep(100); - hisi_hba->hw->phy_start(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 1); break; case PHY_FUNC_DISABLE: - hisi_hba->hw->phy_disable(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 0); break; case PHY_FUNC_SET_LINK_RATE: @@ -2172,16 +2195,18 @@ static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) { struct asd_sas_phy *sas_phy = &phy->sas_phy; struct sas_phy *sphy = sas_phy->phy; - struct sas_phy_data *d = sphy->hostdata; + unsigned long flags; phy->phy_attached = 0; phy->phy_type = 0; phy->port = NULL; - if (d->enable) + spin_lock_irqsave(&phy->lock, flags); + if (phy->enable) sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; else sphy->negotiated_linkrate = SAS_PHY_DISABLED; + spin_unlock_irqrestore(&phy->lock, flags); } void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy) diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c index 078ddd3871f2..717972283acf 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c @@ -798,16 +798,11 @@ static void start_phy_v1_hw(struct hisi_hba *hisi_hba, int phy_no) enable_phy_v1_hw(hisi_hba, phy_no); } -static void stop_phy_v1_hw(struct hisi_hba *hisi_hba, int phy_no) -{ - disable_phy_v1_hw(hisi_hba, phy_no); -} - static void phy_hard_reset_v1_hw(struct hisi_hba *hisi_hba, int phy_no) { - stop_phy_v1_hw(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 0); msleep(100); - start_phy_v1_hw(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 1); } static void start_phys_v1_hw(struct timer_list *t) @@ -817,7 +812,7 @@ static void start_phys_v1_hw(struct timer_list *t) for (i = 0; i < hisi_hba->n_phy; i++) { hisi_sas_phy_write32(hisi_hba, i, CHL_INT2_MSK, 0x12a); - start_phy_v1_hw(hisi_hba, i); + hisi_sas_phy_enable(hisi_hba, i, 1); } } diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c index 33b72c7f72c5..3696cfe48574 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c @@ -1546,14 +1546,14 @@ static void phy_hard_reset_v2_hw(struct hisi_hba *hisi_hba, int phy_no) struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; u32 txid_auto; - disable_phy_v2_hw(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 0); if (phy->identify.device_type == SAS_END_DEVICE) { txid_auto = hisi_sas_phy_read32(hisi_hba, phy_no, TXID_AUTO); hisi_sas_phy_write32(hisi_hba, phy_no, TXID_AUTO, txid_auto | TX_HARDRST_MSK); } msleep(100); - start_phy_v2_hw(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 1); } static void phy_get_events_v2_hw(struct hisi_hba *hisi_hba, int phy_no) @@ -1586,7 +1586,7 @@ static void phys_init_v2_hw(struct hisi_hba *hisi_hba) if (!sas_phy->phy->enabled) continue; - start_phy_v2_hw(hisi_hba, i); + hisi_sas_phy_enable(hisi_hba, i, 1); } } diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index e8323d038d53..3b33816ea6e6 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -856,14 +856,14 @@ static void phy_hard_reset_v3_hw(struct hisi_hba *hisi_hba, int phy_no) struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no]; u32 txid_auto; - disable_phy_v3_hw(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 0); if (phy->identify.device_type == SAS_END_DEVICE) { txid_auto = hisi_sas_phy_read32(hisi_hba, phy_no, TXID_AUTO); hisi_sas_phy_write32(hisi_hba, phy_no, TXID_AUTO, txid_auto | TX_HARDRST_MSK); } msleep(100); - start_phy_v3_hw(hisi_hba, phy_no); + hisi_sas_phy_enable(hisi_hba, phy_no, 1); } static enum sas_linkrate phy_get_max_linkrate_v3_hw(void) @@ -882,7 +882,7 @@ static void phys_init_v3_hw(struct hisi_hba *hisi_hba) if (!sas_phy->phy->enabled) continue; - start_phy_v3_hw(hisi_hba, i); + hisi_sas_phy_enable(hisi_hba, i, 1); } } -- 2.17.1