From patchwork Thu Mar 9 21:55:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13168405 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 670BEC6FD1C for ; Thu, 9 Mar 2023 21:58:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231461AbjCIV6o (ORCPT ); Thu, 9 Mar 2023 16:58:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52794 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231377AbjCIV5v (ORCPT ); Thu, 9 Mar 2023 16:57:51 -0500 Received: from esa6.hgst.iphmx.com (esa6.hgst.iphmx.com [216.71.154.45]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB44F104602; Thu, 9 Mar 2023 13:56:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1678398979; x=1709934979; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=b3t9TDGDVd6dul8YsZ3WiIeS5vzUCYXD0uOdsIM+ZyE=; b=KEXCGbjlFLW8KJLx6sR37La4WxR0nHRocObdGfhnlofy2LCJ2ZAZfM3W 1JwZFgCH/8+dLkc7wW6LZsoZudRUPriHLfyAPk6ZXrqgLfqnttrL6cC/u amLXFENN177EUQRHnHoFbmFq38rtbYUQm7kTm7LXiDKH571L0l4g0cdxZ DTJehdyilEhwHs/MFsfYokVrc/FQ3jS5omTE6huqVnW7/iAn7+4hxIuyo +wY5NyM/XkAZOMmOd1wb1CenjRx4BU6Bdnd+qJItBmGxEvQadXutQZJME wLM3ry9QrjKnRolkP7znHHosoKAofTi5Qc1fzmQdcHvdfVbCr/fkKy5pY g==; X-IronPort-AV: E=Sophos;i="5.98,247,1673884800"; d="scan'208";a="225271060" Received: from h199-255-45-15.hgst.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 10 Mar 2023 05:56:16 +0800 IronPort-SDR: XlrBM0nFiQn7HWZzm9yvJ/p+8Wbv5CSTkHwpnNhNWT6H0sRh1Y5Z9C+D8LT96+bGQB3iDrYQZx zTkOucTT9G41D2i/A9C/VX7nyRjyEyzqzCCbDeNpi+tujmHrWSyKkq6nF3rsmP8hRmwAmga7yH t6cBpL3sb836P8RUZso0Mf/EoxhBg+bE8VH6Xev+adwKOxNPTP0dHkg6rKvc1+mZcxfiacUPfo 8ZaGv0J5gGV8Me6gegeH5HkZ3JGwkrT5zstZ31rFGfNoYDstKmHlXRW2eLK1r5UWFG6845eomJ ehk= Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 09 Mar 2023 13:07:09 -0800 IronPort-SDR: ML2LhZp8n33VoZFDGKiv8llYHAD3PQ0X+nih4eRWEqCeVKvXOM/sUu/Zu0N2oRqXsiFIyMx/qd RO/KzjUN5hBrQ00gUcpaooOk6IAhEsMum45p17z1x/TWvJqnxcWIjLZinYeubeANWvKzJ3SvC+ qs5HELFle6WSXBf9YvRMlbtFSB+IO5OTVvBMw1MHgjfa2zB26uhYXrWWRwB1Gl/QwUj6RMNfK7 UKNa0FZF7RI2iNNZ9r0dmPsvxBMz8QtlPPs4r5l+eby/DwN8b46Xs8Pn/10SIevrT0ZZnpRfMX 7l4= WDCIronportException: Internal Received: from unknown (HELO x1-carbon.wdc.com) ([10.225.164.41]) by uls-op-cesaip01.wdc.com with ESMTP; 09 Mar 2023 13:56:15 -0800 From: Niklas Cassel To: Damien Le Moal Cc: Christoph Hellwig , Hannes Reinecke , linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org, linux-block@vger.kernel.org, Niklas Cassel Subject: [PATCH v4 17/19] ata: libata: add ATA feature control sub-page translation Date: Thu, 9 Mar 2023 22:55:09 +0100 Message-Id: <20230309215516.3800571-18-niklas.cassel@wdc.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230309215516.3800571-1-niklas.cassel@wdc.com> References: <20230309215516.3800571-1-niklas.cassel@wdc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Damien Le Moal Add support for the ATA feature control sub-page of the control mode page to enable/disable the command duration limits feature using the cdl_ctrl field of the ATA feature control sub-page. Both mode sense and mode select translation are supported. For mode sense, the ata device flag ATA_DFLAG_CDL_ENABLED is used to cache the status of the command duration limits feature. Enabling this feature is done using a SET FEATURES command with a cdl action set to 1 when the page cdl_ctrl field value is 0x2 (T2A and T2B pages supported). If this field is 0, CDL is disabled using the SET FEATURES command with a cdl action set to 0. Since a device CDL and NCQ priority features should not be used simultaneously, ata_mselect_control_ata_feature() returns an error when attempting to enable CDL with the device priority feature enabled. Conversely, the function ata_ncq_prio_enable_store() used to enable the use of the device NCQ priority feature through sysfs is modified to return an error if the device CDL feature is enabled. Signed-off-by: Damien Le Moal Co-developed-by: Niklas Cassel Signed-off-by: Niklas Cassel Reviewed-by: Hannes Reinecke --- drivers/ata/libata-core.c | 40 ++++++++- drivers/ata/libata-sata.c | 11 ++- drivers/ata/libata-scsi.c | 167 ++++++++++++++++++++++++++++++++------ include/linux/ata.h | 3 + include/linux/libata.h | 1 + 5 files changed, 193 insertions(+), 29 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 78e53f4fa741..62e100fa90e2 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -2371,13 +2371,15 @@ static void ata_dev_config_cdl(struct ata_device *dev) { struct ata_port *ap = dev->link->ap; unsigned int err_mask; + bool cdl_enabled; u64 val; if (ata_id_major_version(dev->id) < 12) goto not_supported; if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE) || - !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES)) + !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) || + !ata_identify_page_supported(dev, ATA_LOG_CURRENT_SETTINGS)) goto not_supported; err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, @@ -2396,6 +2398,40 @@ static void ata_dev_config_cdl(struct ata_device *dev) ata_dev_warn(dev, "Command duration guideline is not supported\n"); + /* + * If CDL is marked as enabled, make sure the feature is enabled too. + * Conversely, if CDL is disabled, make sure the feature is turned off. + */ + err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, + ATA_LOG_CURRENT_SETTINGS, + ap->sector_buf, 1); + if (err_mask) + goto not_supported; + + val = get_unaligned_le64(&ap->sector_buf[8]); + cdl_enabled = val & BIT_ULL(63) && val & BIT_ULL(21); + if (dev->flags & ATA_DFLAG_CDL_ENABLED) { + if (!cdl_enabled) { + /* Enable CDL on the device */ + err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 1); + if (err_mask) { + ata_dev_err(dev, + "Enable CDL feature failed\n"); + goto not_supported; + } + } + } else { + if (cdl_enabled) { + /* Disable CDL on the device */ + err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 0); + if (err_mask) { + ata_dev_err(dev, + "Disable CDL feature failed\n"); + goto not_supported; + } + } + } + /* * Command duration limits is supported: cache the CDL log page 18h * (command duration descriptors). @@ -2412,7 +2448,7 @@ static void ata_dev_config_cdl(struct ata_device *dev) return; not_supported: - dev->flags &= ~ATA_DFLAG_CDL; + dev->flags &= ~(ATA_DFLAG_CDL | ATA_DFLAG_CDL_ENABLED); } static int ata_dev_config_lba(struct ata_device *dev) diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c index f3e7396e3191..57cb33060c9d 100644 --- a/drivers/ata/libata-sata.c +++ b/drivers/ata/libata-sata.c @@ -907,10 +907,17 @@ static ssize_t ata_ncq_prio_enable_store(struct device *device, goto unlock; } - if (input) + if (input) { + if (dev->flags & ATA_DFLAG_CDL_ENABLED) { + ata_dev_err(dev, + "CDL must be disabled to enable NCQ priority\n"); + rc = -EINVAL; + goto unlock; + } dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLED; - else + } else { dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED; + } unlock: spin_unlock_irq(ap->lock); diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 9315a4c01276..8dde1cede5ca 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -58,6 +58,8 @@ static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, #define CDL_T2A_SUB_MPAGE 0x07 #define CDL_T2B_SUB_MPAGE 0x08 #define CDL_T2_SUB_MPAGE_LEN 232 +#define ATA_FEATURE_SUB_MPAGE 0xf2 +#define ATA_FEATURE_SUB_MPAGE_LEN 16 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { RW_RECOVERY_MPAGE, @@ -2286,6 +2288,31 @@ static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, return CDL_T2_SUB_MPAGE_LEN; } +/* + * Simulate MODE SENSE control mode page, sub-page f2h + * (ATA feature control mode page). + */ +static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, + u8 *buf) +{ + /* PS=0, SPF=1 */ + buf[0] = CONTROL_MPAGE | (1 << 6); + buf[1] = ATA_FEATURE_SUB_MPAGE; + + /* + * The first four bytes of ATA Feature Control mode page are a header. + * The PAGE LENGTH field is the size of the page excluding the header. + */ + put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); + + if (dev->flags & ATA_DFLAG_CDL) + buf[4] = 0x02; /* Support T2A and T2B pages */ + else + buf[4] = 0; + + return ATA_FEATURE_SUB_MPAGE_LEN; +} + /** * ata_msense_control - Simulate MODE SENSE control mode page * @dev: ATA device of interest @@ -2309,10 +2336,13 @@ static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, case CDL_T2A_SUB_MPAGE: case CDL_T2B_SUB_MPAGE: return ata_msense_control_spgt2(dev, buf, spg); + case ATA_FEATURE_SUB_MPAGE: + return ata_msense_control_ata_feature(dev, buf); case ALL_SUB_MPAGES: n = ata_msense_control_spg0(dev, buf, changeable); n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); + n += ata_msense_control_ata_feature(dev, buf + n); return n; default: return 0; @@ -2391,7 +2421,7 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) spg = scsicmd[3]; /* - * Supported subpages: all subpages and sub-pages 07h and 08h of + * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of * the control page. */ if (spg) { @@ -2400,6 +2430,7 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) break; case CDL_T2A_SUB_MPAGE: case CDL_T2B_SUB_MPAGE: + case ATA_FEATURE_SUB_MPAGE: if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) break; fallthrough; @@ -3708,20 +3739,11 @@ static int ata_mselect_caching(struct ata_queued_cmd *qc, return 0; } -/** - * ata_mselect_control - Simulate MODE SELECT for control page - * @qc: Storage for translated ATA taskfile - * @buf: input buffer - * @len: number of valid bytes in the input buffer - * @fp: out parameter for the failed field on error - * - * Prepare a taskfile to modify caching information for the device. - * - * LOCKING: - * None. +/* + * Simulate MODE SELECT control mode page, sub-page 0. */ -static int ata_mselect_control(struct ata_queued_cmd *qc, - const u8 *buf, int len, u16 *fp) +static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, + const u8 *buf, int len, u16 *fp) { struct ata_device *dev = qc->dev; u8 mpage[CONTROL_MPAGE_LEN]; @@ -3759,6 +3781,83 @@ static int ata_mselect_control(struct ata_queued_cmd *qc, return 0; } +/* + * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode + * page) into a SET FEATURES command. + */ +static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, + const u8 *buf, int len, + u16 *fp) +{ + struct ata_device *dev = qc->dev; + struct ata_taskfile *tf = &qc->tf; + u8 cdl_action; + + /* + * The first four bytes of ATA Feature Control mode page are a header, + * so offsets in mpage are off by 4 compared to buf. Same for len. + */ + if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { + *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); + return -EINVAL; + } + + /* Check cdl_ctrl */ + switch (buf[0] & 0x03) { + case 0: + /* Disable CDL */ + cdl_action = 0; + dev->flags &= ~ATA_DFLAG_CDL_ENABLED; + break; + case 0x02: + /* Enable CDL T2A/T2B: NCQ priority must be disabled */ + if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { + ata_dev_err(dev, + "NCQ priority must be disabled to enable CDL\n"); + return -EINVAL; + } + cdl_action = 1; + dev->flags |= ATA_DFLAG_CDL_ENABLED; + break; + default: + *fp = 0; + return -EINVAL; + } + + tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; + tf->protocol = ATA_PROT_NODATA; + tf->command = ATA_CMD_SET_FEATURES; + tf->feature = SETFEATURES_CDL; + tf->nsect = cdl_action; + + return 1; +} + +/** + * ata_mselect_control - Simulate MODE SELECT for control page + * @qc: Storage for translated ATA taskfile + * @buf: input buffer + * @len: number of valid bytes in the input buffer + * @fp: out parameter for the failed field on error + * + * Prepare a taskfile to modify caching information for the device. + * + * LOCKING: + * None. + */ +static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, + const u8 *buf, int len, u16 *fp) +{ + switch (spg) { + case 0: + return ata_mselect_control_spg0(qc, buf, len, fp); + case ATA_FEATURE_SUB_MPAGE: + return ata_mselect_control_ata_feature(qc, buf, len, fp); + default: + return -EINVAL; + } +} + /** * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands * @qc: Storage for translated ATA taskfile @@ -3776,7 +3875,7 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) const u8 *cdb = scmd->cmnd; u8 pg, spg; unsigned six_byte, pg_len, hdr_len, bd_len; - int len; + int len, ret; u16 fp = (u16)-1; u8 bp = 0xff; u8 buffer[64]; @@ -3861,13 +3960,29 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) } /* - * No mode subpages supported (yet) but asking for _all_ - * subpages may be valid + * Supported subpages: all subpages and ATA feature sub-page f2h of + * the control page. */ - if (spg && (spg != ALL_SUB_MPAGES)) { - fp = (p[0] & 0x40) ? 1 : 0; - fp += hdr_len + bd_len; - goto invalid_param; + if (spg) { + switch (spg) { + case ALL_SUB_MPAGES: + /* All subpages is not supported for the control page */ + if (pg == CONTROL_MPAGE) { + fp = (p[0] & 0x40) ? 1 : 0; + fp += hdr_len + bd_len; + goto invalid_param; + } + break; + case ATA_FEATURE_SUB_MPAGE: + if (qc->dev->flags & ATA_DFLAG_CDL && + pg == CONTROL_MPAGE) + break; + fallthrough; + default: + fp = (p[0] & 0x40) ? 1 : 0; + fp += hdr_len + bd_len; + goto invalid_param; + } } if (pg_len > len) goto invalid_param_len; @@ -3880,14 +3995,16 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) } break; case CONTROL_MPAGE: - if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { + ret = ata_mselect_control(qc, spg, p, pg_len, &fp); + if (ret < 0) { fp += hdr_len + bd_len; goto invalid_param; - } else { - goto skip; /* No ATA command to send */ } + if (!ret) + goto skip; /* No ATA command to send */ break; - default: /* invalid page code */ + default: + /* Invalid page code */ fp = bd_len + hdr_len; goto invalid_param; } diff --git a/include/linux/ata.h b/include/linux/ata.h index b01e2cebe1fe..a59b17d6ad11 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -330,6 +330,7 @@ enum { /* Identify device log pages: */ ATA_LOG_SUPPORTED_CAPABILITIES = 0x03, + ATA_LOG_CURRENT_SETTINGS = 0x04, ATA_LOG_SECURITY = 0x06, ATA_LOG_SATA_SETTINGS = 0x08, ATA_LOG_ZONED_INFORMATION = 0x09, @@ -419,6 +420,8 @@ enum { SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */ SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */ + SETFEATURES_CDL = 0x0d, /* Enable/disable cmd duration limits */ + /* SETFEATURE Sector counts for SATA features */ SATA_FPDMA_OFFSET = 0x01, /* FPDMA non-zero buffer offsets */ SATA_FPDMA_AA = 0x02, /* FPDMA Setup FIS Auto-Activate */ diff --git a/include/linux/libata.h b/include/linux/libata.h index 2b17d6c99a37..d7fe735e6322 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -106,6 +106,7 @@ enum { ATA_DFLAG_INIT_MASK = (1 << 20) - 1, ATA_DFLAG_NCQ_PRIO_ENABLED = (1 << 20), /* Priority cmds sent to dev */ + ATA_DFLAG_CDL_ENABLED = (1 << 21), /* cmd duration limits is enabled */ ATA_DFLAG_DETACH = (1 << 24), ATA_DFLAG_DETACHED = (1 << 25), ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */