From patchwork Thu Jun 9 10:29:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 12875237 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 9A38FCCA473 for ; Thu, 9 Jun 2022 10:38:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243125AbiFIKiV (ORCPT ); Thu, 9 Jun 2022 06:38:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34406 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243194AbiFIKhT (ORCPT ); Thu, 9 Jun 2022 06:37:19 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57262213ADC; Thu, 9 Jun 2022 03:36:57 -0700 (PDT) Received: from fraeml702-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4LJgPz3D4hz683T0; Thu, 9 Jun 2022 18:32:07 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml702-chm.china.huawei.com (10.206.15.51) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2375.24; Thu, 9 Jun 2022 12:36:55 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 9 Jun 2022 11:36:51 +0100 From: John Garry To: , , , , , , CC: , , , , , John Garry Subject: [PATCH RFC v2 18/18] scsi: libsas drivers: Remove private tag management Date: Thu, 9 Jun 2022 18:29:19 +0800 Message-ID: <1654770559-101375-19-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1654770559-101375-1-git-send-email-john.garry@huawei.com> References: <1654770559-101375-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Now every sas_task which the driver sees has a SCSI command and also request associated, so drop the internal tag management. For now we are only fixing up hisi_sas v2 HW, but all others need this. Signed-off-by: John Garry --- drivers/scsi/hisi_sas/hisi_sas_main.c | 74 +++----------------------- drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 3 +- drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 3 +- drivers/scsi/libsas/sas_ata.c | 5 +- include/scsi/libsas.h | 8 ++- 5 files changed, 19 insertions(+), 74 deletions(-) diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 50ca7d63ab58..e487a6e6fe7e 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -169,41 +169,6 @@ static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx) } } -static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx) -{ - void *bitmap = hisi_hba->slot_index_tags; - - __set_bit(slot_idx, bitmap); -} - -static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, - struct scsi_cmnd *scsi_cmnd) -{ - int index; - void *bitmap = hisi_hba->slot_index_tags; - - if (scsi_cmnd) - return scsi_cmd_to_rq(scsi_cmnd)->tag; - - spin_lock(&hisi_hba->lock); - index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count, - hisi_hba->last_slot_index + 1); - if (index >= hisi_hba->slot_index_count) { - index = find_next_zero_bit(bitmap, - hisi_hba->slot_index_count, - HISI_SAS_UNRESERVED_IPTT); - if (index >= hisi_hba->slot_index_count) { - spin_unlock(&hisi_hba->lock); - return -SAS_QUEUE_FULL; - } - } - hisi_sas_slot_index_set(hisi_hba, index); - hisi_hba->last_slot_index = index; - spin_unlock(&hisi_hba->lock); - - return index; -} - void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task, struct hisi_sas_slot *slot) { @@ -458,18 +423,17 @@ void hisi_sas_task_deliver(struct hisi_hba *hisi_hba, static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) { int n_elem = 0, n_elem_dif = 0, n_elem_req = 0; + struct scsi_cmnd *scmd = sas_scmd_from_task(task); struct domain_device *device = task->dev; struct asd_sas_port *sas_port = device->port; struct hisi_sas_device *sas_dev = device->lldd_dev; bool internal_abort = sas_is_internal_abort(task); - struct scsi_cmnd *scmd = NULL; struct hisi_sas_dq *dq = NULL; struct hisi_sas_port *port; struct hisi_hba *hisi_hba; struct hisi_sas_slot *slot; struct device *dev; int rc; - if (!sas_port) { struct task_status_struct *ts = &task->task_status; @@ -487,6 +451,8 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) hisi_hba = dev_to_hisi_hba(device); dev = hisi_hba->dev; + dq = &hisi_hba->dq[sas_task_to_hwq(task)]; + switch (task->task_proto) { case SAS_PROTOCOL_SSP: case SAS_PROTOCOL_SMP: @@ -521,31 +487,6 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) return -ECOMM; } - if (task->uldd_task) { - struct ata_queued_cmd *qc; - - if (dev_is_sata(device)) { - qc = task->uldd_task; - scmd = qc->scsicmd; - } else { - scmd = task->uldd_task; - } - } - - if (scmd) { - unsigned int dq_index; - u32 blk_tag; - - blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd)); - dq_index = blk_mq_unique_tag_to_hwq(blk_tag); - dq = &hisi_hba->dq[dq_index]; - } else { - struct Scsi_Host *shost = hisi_hba->shost; - struct blk_mq_queue_map *qmap = &shost->tag_set.map[HCTX_TYPE_DEFAULT]; - int queue = qmap->mq_map[raw_smp_processor_id()]; - - dq = &hisi_hba->dq[queue]; - } break; case SAS_PROTOCOL_INTERNAL_ABORT: if (!hisi_hba->hw->prep_abort) @@ -556,9 +497,6 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) return -EINVAL; - - port = to_hisi_sas_port(sas_port); - dq = &hisi_hba->dq[sas_task_to_hwq(task)]; break; default: dev_err(hisi_hba->dev, "task prep: unknown/unsupported proto (0x%x)\n", @@ -577,10 +515,12 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) goto err_out_dma_unmap; } - if (!internal_abort && hisi_hba->hw->slot_index_alloc) + if (scsi_is_reserved_cmd(scmd)) + rc = sas_task_to_unique_tag(task); + else if (hisi_hba->hw->slot_index_alloc) rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device); else - rc = hisi_sas_slot_index_alloc(hisi_hba, scmd); + rc = sas_task_to_unique_tag(task); if (rc < 0) goto err_out_dif_dma_unmap; diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c index a1e60d2ef070..c2af2adf75c3 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c @@ -2493,6 +2493,7 @@ static void prep_ata_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_port *port = to_hisi_sas_port(sas_port); struct sas_ata_task *ata_task = &task->ata_task; struct sas_tmf_task *tmf = slot->tmf; + struct scsi_cmnd *scmd = sas_scmd_from_task(task); u8 *buf_cmd; int has_data = 0, hdr_tag = 0; u32 dw0, dw1 = 0, dw2 = 0; @@ -2538,7 +2539,7 @@ static void prep_ata_v2_hw(struct hisi_hba *hisi_hba, /* dw2 */ if (task->ata_task.use_ncq) { - struct ata_queued_cmd *qc = task->uldd_task; + struct ata_queued_cmd *qc = (struct ata_queued_cmd *)scmd->host_scribble; hdr_tag = qc->tag; task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3); diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index 7d819fc0395e..6a76cc2e34af 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -1382,6 +1382,7 @@ static void prep_ata_v3_hw(struct hisi_hba *hisi_hba, struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr; struct asd_sas_port *sas_port = device->port; struct hisi_sas_port *port = to_hisi_sas_port(sas_port); + struct scsi_cmnd *scmd = sas_scmd_from_task(task); u8 *buf_cmd; int has_data = 0, hdr_tag = 0; u32 dw1 = 0, dw2 = 0; @@ -1421,7 +1422,7 @@ static void prep_ata_v3_hw(struct hisi_hba *hisi_hba, /* dw2 */ if (task->ata_task.use_ncq) { - struct ata_queued_cmd *qc = task->uldd_task; + struct ata_queued_cmd *qc = (struct ata_queued_cmd *)scmd->host_scribble; hdr_tag = qc->tag; task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3); diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 66534332e9ac..6ebcabdf0c01 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -188,7 +188,6 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) qc->tf.nsect = 0; ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *)&task->ata_task.fis); - task->uldd_task = qc; if (ata_is_atapi(qc->tf.protocol)) { memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); task->total_xfer_len = qc->nbytes; @@ -211,8 +210,7 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) task->ata_task.use_ncq = ata_is_ncq(qc->tf.protocol); task->ata_task.dma_xfer = ata_is_dma(qc->tf.protocol); - if (qc->scsicmd) - ASSIGN_SAS_TASK(qc->scsicmd, task); + ASSIGN_SAS_TASK(qc->scsicmd, qc); ret = i->dft->lldd_execute_task(task, GFP_ATOMIC); if (ret) { @@ -473,7 +471,6 @@ static void sas_ata_post_internal(struct ata_queued_cmd *qc) qc->lldd_task = NULL; if (!task) return; - task->uldd_task = NULL; sas_ata_internal_abort(task); } } diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 62acbc8a46fd..3dd4d9c47b2b 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -619,7 +619,6 @@ struct sas_task { void (*task_done)(struct sas_task *); void *lldd_task; /* for use by LLDDs */ - void *uldd_task; struct sas_task_slow *slow_task; struct sas_tmf_task *tmf; }; @@ -798,5 +797,12 @@ static inline unsigned int sas_task_to_hwq(struct sas_task *task) return blk_mq_unique_tag_to_hwq(unique); } +static inline unsigned int sas_task_to_unique_tag(struct sas_task *task) +{ + u32 unique = sas_task_to_rq_unique_tag(task); + + return blk_mq_unique_tag_to_tag(unique); + +} #endif /* _SASLIB_H_ */