From patchwork Tue Jun 23 04:03:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daejun Park X-Patchwork-Id: 213712 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=-7.1 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED 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 797CDC433DF for ; Tue, 23 Jun 2020 04:23:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2CBE5206FA for ; Tue, 23 Jun 2020 04:23:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="DAT8Ak/M" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728536AbgFWEXG (ORCPT ); Tue, 23 Jun 2020 00:23:06 -0400 Received: from mailout2.samsung.com ([203.254.224.25]:57089 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726539AbgFWEXG (ORCPT ); Tue, 23 Jun 2020 00:23:06 -0400 Received: from epcas1p1.samsung.com (unknown [182.195.41.45]) by mailout2.samsung.com (KnoxPortal) with ESMTP id 20200623042302epoutp02b106ab71105e670d59434d582c0ab8c3~bEYsblTkN0096600966epoutp02Y for ; Tue, 23 Jun 2020 04:23:02 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.samsung.com 20200623042302epoutp02b106ab71105e670d59434d582c0ab8c3~bEYsblTkN0096600966epoutp02Y DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1592886182; bh=OOB/MYQP2/k2iMJtZZCvE3+Y629iwLIKjkNfSyycE3I=; h=Subject:Reply-To:From:To:CC:In-Reply-To:Date:References:From; b=DAT8Ak/MB8S7M15eBe2i5OPjO4P//Au3HMfpmu7t6oYM9rfZlucrrUnrcgUrah3ny HpB+sTD1PROmLvyyU5+JTyWJXdjx7zmJ1s0btA9cdYn+GAAzDO/8lbYz4rNNqF2WxF ApFR3puzBZxRho8mgo/HoH7RDzLYZllhn/TDPOtU= Received: from epcpadp2 (unknown [182.195.40.12]) by epcas1p2.samsung.com (KnoxPortal) with ESMTP id 20200623042301epcas1p26a5e74f41f0fb20a0e61165d003234e6~bEYr6INDi1999419994epcas1p2a; Tue, 23 Jun 2020 04:23:01 +0000 (GMT) Mime-Version: 1.0 Subject: [RFC PATCH v3 4/5] scsi: ufs: L2P map management for HPB read Reply-To: daejun7.park@samsung.com From: Daejun Park To: Daejun Park , "avri.altman@wdc.com" , "jejb@linux.ibm.com" , "martin.petersen@oracle.com" , "asutoshd@codeaurora.org" , "stanley.chu@mediatek.com" , "cang@codeaurora.org" , "huobean@gmail.com" , "bvanassche@acm.org" , "tomas.winkler@intel.com" , ALIM AKHTAR CC: "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Sang-yoon Oh , Sung-Jun Park , yongmyung lee , Jinyoung CHOI , Adel Choi , BoRam Shin X-Priority: 3 X-Content-Kind-Code: NORMAL In-Reply-To: <231786897.01592884981694.JavaMail.epsvc@epcpadp2> X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <231786897.01592886181765.JavaMail.epsvc@epcpadp2> Date: Tue, 23 Jun 2020 13:03:49 +0900 X-CMS-MailID: 20200623040349epcms2p7a17dca266ed2cb1900fbb40a0933e5cf X-Sendblock-Type: AUTO_CONFIDENTIAL X-CPGSPASS: Y X-CPGSPASS: Y X-Hop-Count: 3 X-CMS-RootMailID: 20200623010201epcms2p11aebdf1fbc719b409968cba997507114 References: <231786897.01592884981694.JavaMail.epsvc@epcpadp2> <963815509.21592884502243.JavaMail.epsvc@epcpadp1> <231786897.01592884381695.JavaMail.epsvc@epcpadp2> <963815509.21592879582091.JavaMail.epsvc@epcpadp2> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org This is a patch for managing L2P map in HPB module. The HPB divides logical addresses into several regions. A region consists of several sub-regions. The sub-region is a basic unit where L2P mapping is managed. The driver loads L2P mapping data of each sub-region. The loaded sub-region is called active-state. The HPB driver unloads L2P mapping data as region unit. The unloaded region is called inactive-state. Sub-region/region candidates to be loaded and unloaded are delivered from the UFS device. The UFS device delivers the recommended active sub-region and inactivate region to the driver using sensedata. The HPB module performs L2P mapping management on the host through the delivered information. A pinned region is a pre-set regions on the UFS device that is always activate-state. The data structure for map data request and L2P map uses mempool API, minimizing allocation overhead while avoiding static allocation. The map_work manages active/inactive by 2 "to-do" lists. Each hpb lun maintains 2 "to-do" lists: hpb->lh_inact_rgn - regions to be inactivated, and hpb->lh_act_srgn - subregions to be activated Those lists are maintained on IO completion. Signed-off-by: Daejun Park --- drivers/scsi/ufs/ufshpb.c | 992 +++++++++++++++++++++++++++++++++++++- drivers/scsi/ufs/ufshpb.h | 72 +++ 2 files changed, 1060 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c index 84a9af2fdc80..e1af4c2ed9ab 100644 --- a/drivers/scsi/ufs/ufshpb.c +++ b/drivers/scsi/ufs/ufshpb.c @@ -15,6 +15,7 @@ #include "ufshpb.h" static struct ufshpb_driver ufshpb_drv; +unsigned int ufshpb_host_map_kbytes = 1 * 1024; static int ufshpb_create_sysfs(struct ufs_hba *hba, struct ufshpb_lu *hpb); @@ -25,6 +26,63 @@ static inline int ufshpb_is_valid_srgn(struct ufshpb_region *rgn, srgn->srgn_state == HPB_SRGN_VALID; } +static inline bool ufshpb_is_general_lun(int lun) +{ + return lun < UFS_UPIU_MAX_UNIT_NUM_ID; +} + +static inline bool +ufshpb_is_pinned_region(struct ufshpb_lu *hpb, int rgn_idx) +{ + if (hpb->lu_pinned_end != PINNED_NOT_SET && + rgn_idx >= hpb->lu_pinned_start && + rgn_idx <= hpb->lu_pinned_end) + return true; + + return false; +} + +static bool ufshpb_is_empty_rsp_lists(struct ufshpb_lu *hpb) +{ + bool ret = true; + unsigned long flags; + + spin_lock_irqsave(&hpb->rsp_list_lock, flags); + if (!list_empty(&hpb->lh_inact_rgn) || !list_empty(&hpb->lh_act_srgn)) + ret = false; + spin_unlock_irqrestore(&hpb->rsp_list_lock, flags); + + return ret; +} + +static inline int ufshpb_may_field_valid(struct ufs_hba *hba, + struct ufshcd_lrb *lrbp, + struct ufshpb_rsp_field *rsp_field) +{ + if (be16_to_cpu(rsp_field->sense_data_len) != DEV_SENSE_SEG_LEN || + rsp_field->desc_type != DEV_DES_TYPE || + rsp_field->additional_len != DEV_ADDITIONAL_LEN || + rsp_field->hpb_type == HPB_RSP_NONE || + rsp_field->active_rgn_cnt > MAX_ACTIVE_NUM || + rsp_field->inactive_rgn_cnt > MAX_INACTIVE_NUM || + (!rsp_field->active_rgn_cnt && !rsp_field->inactive_rgn_cnt)) + return -EINVAL; + + if (!ufshpb_is_general_lun(lrbp->lun)) { + dev_warn(hba->dev, "ufshpb: lun(%d) not supported\n", + lrbp->lun); + return -EINVAL; + } + + return 0; +} + + +static inline struct ufshpb_lu *ufshpb_get_hpb_data(struct scsi_cmnd *cmd) +{ + return cmd->device->hostdata; +} + static inline int ufshpb_get_state(struct ufshpb_lu *hpb) { return atomic_read(&hpb->hpb_state); @@ -59,6 +117,765 @@ static inline void ufshpb_lu_put(struct ufshpb_lu *hpb) put_device(&hpb->hpb_lu_dev); } +static struct ufshpb_req *ufshpb_get_map_req(struct ufshpb_lu *hpb, + struct ufshpb_subregion *srgn) +{ + struct ufshpb_req *map_req; + struct request *req; + struct bio *bio; + + map_req = kmem_cache_alloc(hpb->map_req_cache, GFP_KERNEL); + if (!map_req) + return NULL; + + req = blk_get_request(hpb->sdev_ufs_lu->request_queue, + REQ_OP_SCSI_IN, BLK_MQ_REQ_PREEMPT); + if (IS_ERR(req)) + goto free_map_req; + + bio = bio_alloc(GFP_KERNEL, hpb->pages_per_srgn); + if (!bio) { + blk_put_request(req); + goto free_map_req; + } + + map_req->hpb = hpb; + map_req->req = req; + map_req->bio = bio; + + map_req->rgn_idx = srgn->rgn_idx; + map_req->srgn_idx = srgn->srgn_idx; + map_req->mctx = srgn->mctx; + map_req->lun = hpb->lun; + + return map_req; + +free_map_req: + kmem_cache_free(hpb->map_req_cache, map_req); + return NULL; +} + +static inline void ufshpb_put_map_req(struct ufshpb_lu *hpb, + struct ufshpb_req *map_req) +{ + bio_put(map_req->bio); + blk_put_request(map_req->req); + kmem_cache_free(hpb->map_req_cache, map_req); +} + + +static inline int ufshpb_clear_dirty_bitmap(struct ufshpb_lu *hpb, + struct ufshpb_subregion *srgn) +{ + WARN_ON(!srgn->mctx); + bitmap_zero(srgn->mctx->ppn_dirty, hpb->entries_per_srgn); + return 0; +} + +static void ufshpb_update_active_info(struct ufshpb_lu *hpb, int rgn_idx, + int srgn_idx) +{ + struct ufshpb_region *rgn; + struct ufshpb_subregion *srgn; + + rgn = hpb->rgn_tbl + rgn_idx; + srgn = rgn->srgn_tbl + srgn_idx; + + list_del_init(&rgn->list_inact_rgn); + + if (list_empty(&srgn->list_act_srgn)) + list_add_tail(&srgn->list_act_srgn, &hpb->lh_act_srgn); +} + +static void ufshpb_update_inactive_info(struct ufshpb_lu *hpb, int rgn_idx) +{ + struct ufshpb_region *rgn; + struct ufshpb_subregion *srgn; + int srgn_idx; + + rgn = hpb->rgn_tbl + rgn_idx; + + for (srgn_idx = 0; srgn_idx < rgn->srgn_cnt; srgn_idx++) { + srgn = rgn->srgn_tbl + srgn_idx; + + list_del_init(&srgn->list_act_srgn); + } + + if (list_empty(&rgn->list_inact_rgn)) + list_add_tail(&rgn->list_inact_rgn, &hpb->lh_inact_rgn); +} + +static void ufshpb_activate_subregion(struct ufshpb_lu *hpb, + struct ufshpb_subregion *srgn) +{ + struct ufshpb_region *rgn; + + /* + * If there is no mctx in subregion + * after I/O progress for HPB_READ_BUFFER, the region to which the + * subregion belongs was evicted. + * Mask sure the the region must not evict in I/O progress + */ + WARN_ON(!srgn->mctx); + + rgn = hpb->rgn_tbl + srgn->rgn_idx; + + if (unlikely(rgn->rgn_state == HPB_RGN_INACTIVE)) { + dev_err(&hpb->hpb_lu_dev, + "region %d subregion %d evicted\n", + srgn->rgn_idx, srgn->srgn_idx); + return; + } + srgn->srgn_state = HPB_SRGN_VALID; +} + +static void ufshpb_map_req_compl_fn(struct request *req, blk_status_t error) +{ + struct ufshpb_req *map_req = (struct ufshpb_req *) req->end_io_data; + struct ufshpb_lu *hpb = map_req->hpb; + struct ufshpb_subregion *srgn; + unsigned long flags; + + srgn = hpb->rgn_tbl[map_req->rgn_idx].srgn_tbl + + map_req->srgn_idx; + + spin_lock_irqsave(&hpb->hpb_state_lock, flags); + ufshpb_activate_subregion(hpb, srgn); + spin_unlock_irqrestore(&hpb->hpb_state_lock, flags); + + ufshpb_put_map_req(map_req->hpb, map_req); + ufshpb_lu_put(hpb); +} + +static inline void ufshpb_set_read_buf_cmd(unsigned char *cdb, int rgn_idx, + int srgn_idx, int srgn_mem_size) +{ + cdb[0] = UFSHPB_READ_BUFFER; + cdb[1] = UFSHPB_READ_BUFFER_ID; + + put_unaligned_be16(rgn_idx, &cdb[2]); + put_unaligned_be16(srgn_idx, &cdb[4]); + put_unaligned_be24(srgn_mem_size, &cdb[6]); + + cdb[9] = 0x00; +} + +static int ufshpb_map_req_add_bio_page(struct ufshpb_lu *hpb, + struct request_queue *q, struct bio *bio, + struct ufshpb_map_ctx *mctx) +{ + int i, ret = 0; + + for (i = 0; i < hpb->pages_per_srgn; i++) { + ret = bio_add_pc_page(q, bio, mctx->m_page[i], PAGE_SIZE, 0); + if (ret != PAGE_SIZE) { + dev_notice(&hpb->hpb_lu_dev, + "bio_add_pc_page fail %d\n", ret); + return -ENOMEM; + } + } + + return 0; +} + +static int ufshpb_execute_map_req(struct ufshpb_lu *hpb, + struct ufshpb_req *map_req) +{ + struct request_queue *q; + struct request *req; + struct scsi_request *rq; + int ret = 0; + + q = hpb->sdev_ufs_lu->request_queue; + ret = ufshpb_map_req_add_bio_page(hpb, q, map_req->bio, + map_req->mctx); + if (ret) { + dev_notice(&hpb->hpb_lu_dev, + "map_req_add_bio_page fail %d - %d\n", + map_req->rgn_idx, map_req->srgn_idx); + return ret; + } + + req = map_req->req; + + blk_rq_append_bio(req, &map_req->bio); + + req->timeout = 0; + req->end_io_data = (void *)map_req; + + rq = scsi_req(req); + ufshpb_set_read_buf_cmd(rq->cmd, map_req->rgn_idx, + map_req->srgn_idx, hpb->srgn_mem_size); + rq->cmd_len = HPB_READ_BUFFER_CMD_LENGTH; + + blk_execute_rq_nowait(q, NULL, req, 1, ufshpb_map_req_compl_fn); + + atomic_inc(&hpb->stats.map_req_cnt); + return 0; +} + +static struct ufshpb_map_ctx *ufshpb_get_map_ctx(struct ufshpb_lu *hpb) +{ + struct ufshpb_map_ctx *mctx; + int i, j; + + mctx = mempool_alloc(ufshpb_drv.ufshpb_mctx_pool, GFP_KERNEL); + if (!mctx) + return NULL; + + mctx->m_page = kmem_cache_alloc(hpb->m_page_cache, GFP_KERNEL); + if (!mctx->m_page) + goto release_mctx; + + mctx->ppn_dirty = bitmap_zalloc(hpb->entries_per_srgn, GFP_KERNEL); + if (!mctx->ppn_dirty) + goto release_m_page; + + for (i = 0; i < hpb->pages_per_srgn; i++) { + mctx->m_page[i] = mempool_alloc(ufshpb_drv.ufshpb_page_pool, + GFP_KERNEL); + if (!mctx->m_page[i]) { + for (j = 0; j < i; j++) + mempool_free(mctx->m_page[j], + ufshpb_drv.ufshpb_page_pool); + goto release_ppn_dirty; + } + clear_page(page_address(mctx->m_page[i])); + } + + return mctx; +release_ppn_dirty: + bitmap_free(mctx->ppn_dirty); +release_m_page: + kmem_cache_free(hpb->m_page_cache, mctx->m_page); +release_mctx: + mempool_free(mctx, ufshpb_drv.ufshpb_mctx_pool); + return NULL; +} + +static inline void ufshpb_put_map_ctx(struct ufshpb_lu *hpb, + struct ufshpb_map_ctx *mctx) +{ + int i; + + for (i = 0; i < hpb->pages_per_srgn; i++) + mempool_free(mctx->m_page[i], + ufshpb_drv.ufshpb_page_pool); + + bitmap_free(mctx->ppn_dirty); + kmem_cache_free(hpb->m_page_cache, mctx->m_page); + mempool_free(mctx, ufshpb_drv.ufshpb_mctx_pool); +} + +static int ufshpb_check_issue_state_srgns(struct ufshpb_lu *hpb, + struct ufshpb_region *rgn) +{ + struct ufshpb_subregion *srgn; + int srgn_idx; + + for (srgn_idx = 0; srgn_idx < rgn->srgn_cnt; srgn_idx++) { + srgn = rgn->srgn_tbl + srgn_idx; + + if (srgn->srgn_state == HPB_SRGN_ISSUED) + return -EPERM; + } + return 0; +} + +static inline void ufshpb_add_lru_info(struct victim_select_info *lru_info, + struct ufshpb_region *rgn) +{ + rgn->rgn_state = HPB_RGN_ACTIVE; + list_add_tail(&rgn->list_lru_rgn, &lru_info->lh_lru_rgn); + atomic_inc(&lru_info->active_cnt); +} + +static inline void ufshpb_hit_lru_info(struct victim_select_info *lru_info, + struct ufshpb_region *rgn) +{ + list_move_tail(&rgn->list_lru_rgn, &lru_info->lh_lru_rgn); +} + +static struct ufshpb_region *ufshpb_victim_lru_info(struct ufshpb_lu *hpb) +{ + struct victim_select_info *lru_info = &hpb->lru_info; + struct ufshpb_region *rgn, *victim_rgn = NULL; + + list_for_each_entry(rgn, &lru_info->lh_lru_rgn, list_lru_rgn) { + WARN_ON(!rgn); + if (ufshpb_check_issue_state_srgns(hpb, rgn)) + continue; + + victim_rgn = rgn; + break; + } + + return victim_rgn; +} + +static inline void ufshpb_cleanup_lru_info(struct victim_select_info *lru_info, + struct ufshpb_region *rgn) +{ + list_del_init(&rgn->list_lru_rgn); + rgn->rgn_state = HPB_RGN_INACTIVE; + atomic_dec(&lru_info->active_cnt); +} + +static inline void ufshpb_purge_active_subregion(struct ufshpb_lu *hpb, + struct ufshpb_subregion *srgn) +{ + if (srgn->srgn_state != HPB_SRGN_UNUSED) { + ufshpb_put_map_ctx(hpb, srgn->mctx); + srgn->srgn_state = HPB_SRGN_UNUSED; + srgn->mctx = NULL; + } +} + +static void __ufshpb_evict_region(struct ufshpb_lu *hpb, + struct ufshpb_region *rgn) +{ + struct victim_select_info *lru_info; + struct ufshpb_subregion *srgn; + int srgn_idx; + + lru_info = &hpb->lru_info; + + dev_dbg(&hpb->hpb_lu_dev, "evict region %d\n", rgn->rgn_idx); + + ufshpb_cleanup_lru_info(lru_info, rgn); + + for (srgn_idx = 0; srgn_idx < rgn->srgn_cnt; srgn_idx++) { + srgn = rgn->srgn_tbl + srgn_idx; + + ufshpb_purge_active_subregion(hpb, srgn); + } +} + +static int ufshpb_evict_region(struct ufshpb_lu *hpb, struct ufshpb_region *rgn) +{ + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&hpb->hpb_state_lock, flags); + if (rgn->rgn_state == HPB_RGN_PINNED) { + dev_warn(&hpb->hpb_lu_dev, + "pinned region cannot drop-out. region %d\n", + rgn->rgn_idx); + goto out; + } + if (!list_empty(&rgn->list_lru_rgn)) { + if (ufshpb_check_issue_state_srgns(hpb, rgn)) { + ret = -EBUSY; + goto out; + } + + __ufshpb_evict_region(hpb, rgn); + } +out: + spin_unlock_irqrestore(&hpb->hpb_state_lock, flags); + return ret; +} + +static inline struct +ufshpb_rsp_field *ufshpb_get_hpb_rsp(struct ufshcd_lrb *lrbp) +{ + return (struct ufshpb_rsp_field *)&lrbp->ucd_rsp_ptr->sr.sense_data_len; +} + +static int ufshpb_issue_map_req(struct ufshpb_lu *hpb, + struct ufshpb_region *rgn, + struct ufshpb_subregion *srgn) +{ + struct ufshpb_req *map_req; + unsigned long flags; + int ret; + int err = -EAGAIN; + bool alloc_required = false; + enum HPB_RGN_STATE state = HPB_SRGN_INVALID; + + spin_lock_irqsave(&hpb->hpb_state_lock, flags); + /* + * Since the region state change occurs only in the map_work, + * the state of the region cannot HPB_RGN_INACTIVE at this point. + * The region state must be changed in the map_work + */ + WARN_ON(rgn->rgn_state == HPB_RGN_INACTIVE); + + if (srgn->srgn_state == HPB_SRGN_UNUSED) + alloc_required = true; + + /* + * If the subregion is already ISSUED state, + * a specific event (e.g., GC or wear-leveling, etc.) occurs in + * the device and HPB response for map loading is received. + * In this case, after finishing the HPB_READ_BUFFER, + * the next HPB_READ_BUFFER is performed again to obtain the latest + * map data. + */ + if (srgn->srgn_state == HPB_SRGN_ISSUED) + goto unlock_out; + + srgn->srgn_state = HPB_SRGN_ISSUED; + spin_unlock_irqrestore(&hpb->hpb_state_lock, flags); + + if (alloc_required) { + WARN_ON(srgn->mctx); + srgn->mctx = ufshpb_get_map_ctx(hpb); + if (!srgn->mctx) { + dev_notice(&hpb->hpb_lu_dev, + "get map_ctx failed. region %d - %d\n", + rgn->rgn_idx, srgn->srgn_idx); + state = HPB_SRGN_UNUSED; + goto change_srgn_state; + } + } + + ufshpb_clear_dirty_bitmap(hpb, srgn); + map_req = ufshpb_get_map_req(hpb, srgn); + if (!map_req) + goto change_srgn_state; + + ret = ufshpb_lu_get(hpb); + if (unlikely(ret)) { + dev_notice(&hpb->hpb_lu_dev, + "%s: ufshpb_lu_get failed: %d", __func__, ret); + goto free_map_req; + } + + ret = ufshpb_execute_map_req(hpb, map_req); + if (ret) { + dev_notice(&hpb->hpb_lu_dev, + "%s: issue map_req failed: %d, region %d - %d\n", + __func__, ret, srgn->rgn_idx, srgn->srgn_idx); + ufshpb_lu_put(hpb); + goto free_map_req; + } + return 0; + +free_map_req: + ufshpb_put_map_req(hpb, map_req); +change_srgn_state: + spin_lock_irqsave(&hpb->hpb_state_lock, flags); + srgn->srgn_state = state; +unlock_out: + spin_unlock_irqrestore(&hpb->hpb_state_lock, flags); + return err; +} + +static int ufshpb_add_region(struct ufshpb_lu *hpb, struct ufshpb_region *rgn) +{ + struct ufshpb_region *victim_rgn; + struct victim_select_info *lru_info = &hpb->lru_info; + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&hpb->hpb_state_lock, flags); + /* + * If region belongs to lru_list, just move the region + * to the front of lru list. because the state of the region + * is already active-state + */ + if (!list_empty(&rgn->list_lru_rgn)) { + ufshpb_hit_lru_info(lru_info, rgn); + goto out; + } + + if (rgn->rgn_state == HPB_RGN_INACTIVE) { + if (atomic_read(&lru_info->active_cnt) + == lru_info->max_lru_active_cnt) { + /* + * If the maximum number of active regions + * is exceeded, evict the least recently used region. + * This case may occur when the device responds + * to the eviction information late. + * It is okay to evict the least recently used region, + * because the device could detect this region + * by not issuing HPB_READ + */ + victim_rgn = ufshpb_victim_lru_info(hpb); + if (!victim_rgn) { + dev_warn(&hpb->hpb_lu_dev, + "cannot get victim region error\n"); + ret = -ENOMEM; + goto out; + } + + dev_dbg(&hpb->hpb_lu_dev, + "LRU full (%d), choost victim %d\n", + atomic_read(&lru_info->active_cnt), + victim_rgn->rgn_idx); + __ufshpb_evict_region(hpb, victim_rgn); + } + + /* + * When a region is added to lru_info list_head, + * it is guaranteed that the subregion has been + * assigned all mctx. If failed, try to receive mctx again + * without being added to lru_info list_head + */ + ufshpb_add_lru_info(lru_info, rgn); + } +out: + spin_unlock_irqrestore(&hpb->hpb_state_lock, flags); + return ret; +} + +static void ufshpb_rsp_req_region_update(struct ufshpb_lu *hpb, + struct ufshpb_rsp_field *rsp_field) +{ + int i, rgn_idx, srgn_idx; + + /* + * If the active region and the inactive region are the same, + * we will inactivate this region. + * The device could check this (region inactivated) and + * will response the proper active region information + */ + spin_lock(&hpb->rsp_list_lock); + for (i = 0; i < rsp_field->active_rgn_cnt; i++) { + rgn_idx = + be16_to_cpu(rsp_field->hpb_active_field[i].active_rgn); + srgn_idx = + be16_to_cpu(rsp_field->hpb_active_field[i].active_srgn); + + dev_dbg(&hpb->hpb_lu_dev, "activate(%d) region %d - %d\n", + i, rgn_idx, srgn_idx); + ufshpb_update_active_info(hpb, rgn_idx, srgn_idx); + atomic_inc(&hpb->stats.rb_active_cnt); + } + + for (i = 0; i < rsp_field->inactive_rgn_cnt; i++) { + rgn_idx = be16_to_cpu(rsp_field->hpb_inactive_field[i]); + dev_dbg(&hpb->hpb_lu_dev, "inactivate(%d) region %d\n", + i, rgn_idx); + ufshpb_update_inactive_info(hpb, rgn_idx); + atomic_inc(&hpb->stats.rb_inactive_cnt); + } + spin_unlock(&hpb->rsp_list_lock); + + dev_dbg(&hpb->hpb_lu_dev, "Noti: #ACT %u #INACT %u\n", + rsp_field->active_rgn_cnt, rsp_field->inactive_rgn_cnt); + + queue_work(ufshpb_drv.ufshpb_wq, &hpb->map_work); +} + +/* routine : isr (ufs) */ +static void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) +{ + struct ufshpb_lu *hpb; + struct ufshpb_rsp_field *rsp_field; + int data_seg_len, ret; + + data_seg_len = be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_2) + & MASK_RSP_UPIU_DATA_SEG_LEN; + + /* To flush remained rsp_list, we queue the map_work task */ + if (!data_seg_len) { + if (!ufshpb_is_general_lun(lrbp->lun)) + return; + + hpb = ufshpb_get_hpb_data(lrbp->cmd); + ret = ufshpb_lu_get(hpb); + if (ret) + return; + + if (!ufshpb_is_empty_rsp_lists(hpb)) + queue_work(ufshpb_drv.ufshpb_wq, &hpb->map_work); + + goto put_hpb; + } + + /* Check HPB_UPDATE_ALERT */ + if (!(lrbp->ucd_rsp_ptr->header.dword_2 & + UPIU_HEADER_DWORD(0, 2, 0, 0))) + return; + + rsp_field = ufshpb_get_hpb_rsp(lrbp); + if (ufshpb_may_field_valid(hba, lrbp, rsp_field)) + return; + + hpb = ufshpb_get_hpb_data(lrbp->cmd); + ret = ufshpb_lu_get(hpb); + if (ret) + return; + + atomic_inc(&hpb->stats.rb_noti_cnt); + + switch (rsp_field->hpb_type) { + case HPB_RSP_REQ_REGION_UPDATE: + WARN_ON(data_seg_len != DEV_DATA_SEG_LEN); + ufshpb_rsp_req_region_update(hpb, rsp_field); + break; + case HPB_RSP_DEV_RESET: + dev_warn(&hpb->hpb_lu_dev, + "UFS device lost HPB information during PM.\n"); + break; + default: + dev_notice(&hpb->hpb_lu_dev, "hpb_type is not available: %d\n", + rsp_field->hpb_type); + break; + } +put_hpb: + ufshpb_lu_put(hpb); +} + +static void ufshpb_add_active_list(struct ufshpb_lu *hpb, + struct ufshpb_region *rgn, + struct ufshpb_subregion *srgn) +{ + if (!list_empty(&rgn->list_inact_rgn)) + return; + + if (!list_empty(&srgn->list_act_srgn)) { + list_move(&srgn->list_act_srgn, &hpb->lh_act_srgn); + return; + } + + list_add(&srgn->list_act_srgn, &hpb->lh_act_srgn); +} + +static void ufshpb_add_pending_evict_list(struct ufshpb_lu *hpb, + struct ufshpb_region *rgn, + struct list_head *pending_list) +{ + struct ufshpb_subregion *srgn; + int srgn_idx; + + if (!list_empty(&rgn->list_inact_rgn)) + return; + + for (srgn_idx = 0; srgn_idx < rgn->srgn_cnt; srgn_idx++) { + srgn = rgn->srgn_tbl + srgn_idx; + + if (!list_empty(&srgn->list_act_srgn)) + return; + } + + list_add_tail(&rgn->list_inact_rgn, pending_list); +} + +static void ufshpb_run_active_subregion_list(struct ufshpb_lu *hpb) +{ + struct ufshpb_region *rgn; + struct ufshpb_subregion *srgn; + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&hpb->rsp_list_lock, flags); + while ((srgn = list_first_entry_or_null(&hpb->lh_act_srgn, + struct ufshpb_subregion, + list_act_srgn))) { + list_del_init(&srgn->list_act_srgn); + spin_unlock_irqrestore(&hpb->rsp_list_lock, flags); + + rgn = hpb->rgn_tbl + srgn->rgn_idx; + ret = ufshpb_add_region(hpb, rgn); + if (ret) + break; + + ret = ufshpb_issue_map_req(hpb, rgn, srgn); + if (ret) { + dev_notice(&hpb->hpb_lu_dev, + "issue map_req failed. ret %d, region %d - %d\n", + ret, rgn->rgn_idx, srgn->srgn_idx); + break; + } + spin_lock_irqsave(&hpb->rsp_list_lock, flags); + } + + if (ret) { + dev_notice(&hpb->hpb_lu_dev, "region %d - %d, will retry\n", + rgn->rgn_idx, srgn->srgn_idx); + spin_lock_irqsave(&hpb->rsp_list_lock, flags); + ufshpb_add_active_list(hpb, rgn, srgn); + } + spin_unlock_irqrestore(&hpb->rsp_list_lock, flags); +} + +static void ufshpb_run_inactive_region_list(struct ufshpb_lu *hpb) +{ + struct ufshpb_region *rgn; + unsigned long flags; + int ret; + LIST_HEAD(pending_list); + + spin_lock_irqsave(&hpb->rsp_list_lock, flags); + while ((rgn = list_first_entry_or_null(&hpb->lh_inact_rgn, + struct ufshpb_region, + list_inact_rgn))) { + list_del_init(&rgn->list_inact_rgn); + spin_unlock_irqrestore(&hpb->rsp_list_lock, flags); + + ret = ufshpb_evict_region(hpb, rgn); + if (ret) { + spin_lock_irqsave(&hpb->rsp_list_lock, flags); + ufshpb_add_pending_evict_list(hpb, rgn, &pending_list); + spin_unlock_irqrestore(&hpb->rsp_list_lock, flags); + } + + spin_lock_irqsave(&hpb->rsp_list_lock, flags); + } + + list_splice(&pending_list, &hpb->lh_inact_rgn); + spin_unlock_irqrestore(&hpb->rsp_list_lock, flags); +} + +static void ufshpb_map_work_handler(struct work_struct *work) +{ + struct ufshpb_lu *hpb; + int ret; + + hpb = container_of(work, struct ufshpb_lu, map_work); + ret = ufshpb_lu_get(hpb); + if (ret) { + dev_info(&hpb->hpb_lu_dev, "%s: exit, state %d\n", + __func__, ufshpb_get_state(hpb)); + return; + } + + ufshpb_run_inactive_region_list(hpb); + ufshpb_run_active_subregion_list(hpb); + + ufshpb_lu_put(hpb); +} + +/* + * this function doesn't need to hold lock due to be called in init. + * (hpb_state_lock, rsp_list_lock, etc..) + */ +static int ufshpb_init_pinned_active_region(struct ufs_hba *hba, + struct ufshpb_lu *hpb, + struct ufshpb_region *rgn) +{ + struct ufshpb_subregion *srgn; + int srgn_idx, i; + int err = 0; + + for (srgn_idx = 0; srgn_idx < rgn->srgn_cnt; srgn_idx++) { + srgn = rgn->srgn_tbl + srgn_idx; + + srgn->mctx = ufshpb_get_map_ctx(hpb); + srgn->srgn_state = HPB_SRGN_INVALID; + if (!srgn->mctx) { + dev_err(hba->dev, + "alloc mctx for pinned region failed\n"); + goto release; + } + + list_add_tail(&srgn->list_act_srgn, &hpb->lh_act_srgn); + } + + rgn->rgn_state = HPB_RGN_PINNED; + return 0; + +release: + for (i = 0; i < srgn_idx; i++) { + srgn = rgn->srgn_tbl + i; + ufshpb_put_map_ctx(hpb, srgn->mctx); + } + return err; +} + static void ufshpb_init_subregion_tbl(struct ufshpb_lu *hpb, struct ufshpb_region *rgn) { @@ -67,6 +884,8 @@ static void ufshpb_init_subregion_tbl(struct ufshpb_lu *hpb, for (srgn_idx = 0; srgn_idx < rgn->srgn_cnt; srgn_idx++) { struct ufshpb_subregion *srgn = rgn->srgn_tbl + srgn_idx; + INIT_LIST_HEAD(&srgn->list_act_srgn); + srgn->rgn_idx = rgn->rgn_idx; srgn->srgn_idx = srgn_idx; srgn->srgn_state = HPB_SRGN_UNUSED; @@ -99,6 +918,8 @@ static void ufshpb_init_lu_parameter(struct ufs_hba *hba, hpb->lu_pinned_end = hpb_lu_info->num_pinned ? (hpb_lu_info->pinned_start + hpb_lu_info->num_pinned - 1) : PINNED_NOT_SET; + hpb->lru_info.max_lru_active_cnt = + hpb_lu_info->max_active_rgns - hpb_lu_info->num_pinned; rgn_mem_size = (1ULL << hpb_dev_info->rgn_size) * HPB_RGN_SIZE_UNIT / HPB_ENTRY_BLOCK_SIZE * HPB_ENTRY_SIZE; @@ -152,6 +973,9 @@ static int ufshpb_alloc_region_tbl(struct ufs_hba *hba, struct ufshpb_lu *hpb) rgn = rgn_table + rgn_idx; rgn->rgn_idx = rgn_idx; + INIT_LIST_HEAD(&rgn->list_inact_rgn); + INIT_LIST_HEAD(&rgn->list_lru_rgn); + if (rgn_idx == hpb->rgns_per_lu - 1) srgn_cnt = ((hpb->srgns_per_lu - 1) % hpb->srgns_per_rgn) + 1; @@ -161,7 +985,13 @@ static int ufshpb_alloc_region_tbl(struct ufs_hba *hba, struct ufshpb_lu *hpb) goto release_srgn_table; ufshpb_init_subregion_tbl(hpb, rgn); - rgn->rgn_state = HPB_RGN_INACTIVE; + if (ufshpb_is_pinned_region(hpb, rgn_idx)) { + ret = ufshpb_init_pinned_active_region(hba, hpb, rgn); + if (ret) + goto release_srgn_table; + } else { + rgn->rgn_state = HPB_RGN_INACTIVE; + } } return 0; @@ -185,7 +1015,10 @@ static void ufshpb_destroy_subregion_tbl(struct ufshpb_lu *hpb, struct ufshpb_subregion *srgn; srgn = rgn->srgn_tbl + srgn_idx; - srgn->srgn_state = HPB_SRGN_UNUSED; + if (srgn->srgn_state != HPB_SRGN_UNUSED) { + srgn->srgn_state = HPB_SRGN_UNUSED; + ufshpb_put_map_ctx(hpb, srgn->mctx); + } } } @@ -215,8 +1048,36 @@ static int ufshpb_lu_hpb_init(struct ufs_hba *hba, struct ufshpb_lu *hpb, int ret; spin_lock_init(&hpb->hpb_state_lock); + spin_lock_init(&hpb->rsp_list_lock); + + INIT_LIST_HEAD(&hpb->lru_info.lh_lru_rgn); + INIT_LIST_HEAD(&hpb->lh_act_srgn); + INIT_LIST_HEAD(&hpb->lh_inact_rgn); + INIT_LIST_HEAD(&hpb->list_hpb_lu); + + INIT_WORK(&hpb->map_work, ufshpb_map_work_handler); + + hpb->map_req_cache = kmem_cache_create("ufshpb_req_cache", + sizeof(struct ufshpb_req), 0, 0, NULL); + if (!hpb->map_req_cache) { + dev_err(hba->dev, "ufshpb(%d) ufshpb_req_cache create fail", + hpb->lun); + return -ENOMEM; + } + + hpb->m_page_cache = kmem_cache_create("ufshpb_m_page_cache", + sizeof(struct page *) * hpb->pages_per_srgn, + 0, 0, NULL); + if (!hpb->m_page_cache) { + dev_err(hba->dev, "ufshpb(%d) ufshpb_m_page_cache create fail", + hpb->lun); + ret = -ENOMEM; + goto release_req_cache; + } ret = ufshpb_alloc_region_tbl(hba, hpb); + if (ret) + goto release_m_page_cache; ret = ufshpb_create_sysfs(hba, hpb); if (ret) @@ -226,6 +1087,10 @@ static int ufshpb_lu_hpb_init(struct ufs_hba *hba, struct ufshpb_lu *hpb, release_rgn_table: ufshpb_destroy_region_tbl(hpb); +release_m_page_cache: + kmem_cache_destroy(hpb->m_page_cache); +release_req_cache: + kmem_cache_destroy(hpb->map_req_cache); return ret; } @@ -257,10 +1122,42 @@ static struct ufshpb_lu *ufshpb_alloc_hpb_lu(struct ufs_hba *hba, int lun, return NULL; } +static void ufshpb_discard_rsp_lists(struct ufshpb_lu *hpb) +{ + struct ufshpb_region *rgn, *next_rgn; + struct ufshpb_subregion *srgn, *next_srgn; + unsigned long flags; + + /* + * If the device reset occurred, the remained HPB region information + * may be stale. Therefore, by dicarding the lists of HPB response + * that remained after reset, it prevents unnecessary work. + */ + spin_lock_irqsave(&hpb->rsp_list_lock, flags); + list_for_each_entry_safe(rgn, next_rgn, &hpb->lh_inact_rgn, + list_inact_rgn) + list_del_init(&rgn->list_inact_rgn); + + list_for_each_entry_safe(srgn, next_srgn, &hpb->lh_act_srgn, + list_act_srgn) + list_del_init(&srgn->list_act_srgn); + spin_unlock_irqrestore(&hpb->rsp_list_lock, flags); +} + +static inline void ufshpb_cancel_jobs(struct ufshpb_lu *hpb) +{ + cancel_work_sync(&hpb->map_work); +} + static void ufshpb_lu_release(struct ufshpb_lu *hpb) { + ufshpb_cancel_jobs(hpb); + ufshpb_destroy_region_tbl(hpb); + kmem_cache_destroy(hpb->map_req_cache); + kmem_cache_destroy(hpb->m_page_cache); + list_del_init(&hpb->list_hpb_lu); } @@ -347,6 +1244,9 @@ static void ufshpb_reset_host(struct ufs_hba *hba) dev_info(&hpb->hpb_lu_dev, "ufshpb run reset_host"); ufshpb_set_state(hpb, HPB_RESET); + ufshpb_cancel_jobs(hpb); + ufshpb_discard_rsp_lists(hpb); + ufshpb_lu_put(hpb); } } @@ -361,6 +1261,7 @@ static void ufshpb_suspend(struct ufs_hba *hba) dev_info(&hpb->hpb_lu_dev, "ufshpb goto suspend"); ufshpb_set_state(hpb, HPB_SUSPEND); + ufshpb_cancel_jobs(hpb); ufshpb_lu_put(hpb); } @@ -376,6 +1277,9 @@ static void ufshpb_resume(struct ufs_hba *hba) dev_info(&hpb->hpb_lu_dev, "ufshpb resume"); ufshpb_set_state(hpb, HPB_PRESENT); + if (!ufshpb_is_empty_rsp_lists(hpb)) + queue_work(ufshpb_drv.ufshpb_wq, &hpb->map_work); + ufshpb_lu_put(hpb); } } @@ -617,6 +1521,8 @@ static void ufshpb_scan_hpb_lu(struct ufs_hba *hba, struct scsi_device *sdev; struct ufshpb_lu *hpb; int find_hpb_lu = 0; + int tot_active_srgn_pages = 0; + int pool_size; int ret; INIT_LIST_HEAD(&ufshpb_drv.lh_hpb_lu); @@ -637,6 +1543,9 @@ static void ufshpb_scan_hpb_lu(struct ufs_hba *hba, if (!hpb) continue; + tot_active_srgn_pages += hpb_lu_info.max_active_rgns * + hpb->srgns_per_rgn * hpb->pages_per_srgn; + hpb->sdev_ufs_lu = sdev; sdev->hostdata = hpb; @@ -648,11 +1557,31 @@ static void ufshpb_scan_hpb_lu(struct ufs_hba *hba, return; ufshpb_check_hpb_reset_query(hba); + + pool_size = DIV_ROUND_UP(ufshpb_host_map_kbytes * 1024, PAGE_SIZE); + if (pool_size > tot_active_srgn_pages) { + dev_info(hba->dev, + "reset pool_size to %lu KB.\n", + tot_active_srgn_pages * PAGE_SIZE / 1024); + mempool_resize(ufshpb_drv.ufshpb_mctx_pool, + tot_active_srgn_pages); + mempool_resize(ufshpb_drv.ufshpb_page_pool, + tot_active_srgn_pages); + } + dev_set_drvdata(&hba->ufsf.hpb_dev, &ufshpb_drv); list_for_each_entry(hpb, &ufshpb_drv.lh_hpb_lu, list_hpb_lu) { dev_info(&hpb->hpb_lu_dev, "set state to present\n"); ufshpb_set_state(hpb, HPB_PRESENT); + + if ((hpb->lu_pinned_end - hpb->lu_pinned_start) > 0) { + dev_info(&hpb->hpb_lu_dev, + "loading pinned regions %d - %d\n", + hpb->lu_pinned_start, hpb->lu_pinned_end); + queue_work(ufshpb_drv.ufshpb_wq, + &hpb->map_work); + } } } @@ -719,6 +1648,8 @@ static int ufshpb_remove(struct device *dev) sdev = hpb->sdev_ufs_lu; sdev->hostdata = NULL; + ufshpb_cancel_jobs(hpb); + device_del(&hpb->hpb_lu_dev); dev_info(&hpb->hpb_lu_dev, "hpb_lu_dev refcnt %d\n", @@ -744,10 +1675,10 @@ static struct ufshpb_driver ufshpb_drv = { .reset_host = ufshpb_reset_host, .suspend = ufshpb_suspend, .resume = ufshpb_resume, + .rsp_upiu = ufshpb_rsp_upiu, }, }; -unsigned int ufshpb_host_map_kbytes = 1 * 1024; module_param(ufshpb_host_map_kbytes, uint, 0644); MODULE_PARM_DESC(ufshpb_host_map_kbytes, "ufshpb host mapping memory kilo-bytes for ufshpb memory-pool"); @@ -755,17 +1686,70 @@ MODULE_PARM_DESC(ufshpb_host_map_kbytes, static int __init ufshpb_init(void) { int ret; + unsigned int pool_size; + + ufshpb_drv.ufshpb_mctx_cache = kmem_cache_create("ufshpb_mctx_cache", + sizeof(struct ufshpb_map_ctx), + 0, 0, NULL); + if (!ufshpb_drv.ufshpb_mctx_cache) { + pr_err("ufshpb: cannot init mctx cache\n"); + return -ENOMEM; + } + + pool_size = DIV_ROUND_UP(ufshpb_host_map_kbytes * 1024, PAGE_SIZE); + pr_info("%s:%d ufshpb_host_map_kbytes %u pool_size %u\n", + __func__, __LINE__, ufshpb_host_map_kbytes, pool_size); + + ufshpb_drv.ufshpb_mctx_pool = mempool_create_slab_pool( + pool_size, ufshpb_drv.ufshpb_mctx_cache); + if (!ufshpb_drv.ufshpb_mctx_pool) { + pr_err("ufshpb: cannot init mctx pool\n"); + ret = -ENOMEM; + goto release_mctx_cache; + } + + ufshpb_drv.ufshpb_page_pool = mempool_create_page_pool(pool_size, 0); + if (!ufshpb_drv.ufshpb_page_pool) { + pr_err("ufshpb: cannot init page pool\n"); + ret = -ENOMEM; + goto release_mctx_pool; + } + + ufshpb_drv.ufshpb_wq = alloc_workqueue("ufshpb-wq", + WQ_UNBOUND | WQ_MEM_RECLAIM, 0); + if (!ufshpb_drv.ufshpb_wq) { + pr_err("ufshpb: alloc workqueue failed\n"); + ret = -ENOMEM; + goto release_page_pool; + } ret = driver_register(&ufshpb_drv.drv); - if (ret) + if (ret) { pr_err("ufshpb: driver register failed\n"); + goto release_wq; + } + return 0; +release_wq: + destroy_workqueue(ufshpb_drv.ufshpb_wq); +release_page_pool: + mempool_destroy(ufshpb_drv.ufshpb_page_pool); +release_mctx_pool: + mempool_destroy(ufshpb_drv.ufshpb_mctx_pool); +release_mctx_cache: + kmem_cache_destroy(ufshpb_drv.ufshpb_mctx_cache); return ret; } static void __exit ufshpb_exit(void) { driver_unregister(&ufshpb_drv.drv); + + mempool_destroy(ufshpb_drv.ufshpb_page_pool); + mempool_destroy(ufshpb_drv.ufshpb_mctx_pool); + kmem_cache_destroy(ufshpb_drv.ufshpb_mctx_cache); + + destroy_workqueue(ufshpb_drv.ufshpb_wq); } MODULE_AUTHOR("Yongmyong Lee "); diff --git a/drivers/scsi/ufs/ufshpb.h b/drivers/scsi/ufs/ufshpb.h index eaa4a3e035b1..d9c27348d354 100644 --- a/drivers/scsi/ufs/ufshpb.h +++ b/drivers/scsi/ufs/ufshpb.h @@ -101,10 +101,36 @@ struct ufshpb_lu_info { int max_active_rgns; }; +struct ufshpb_active_field { + __be16 active_rgn; + __be16 active_srgn; +} __packed; + +struct ufshpb_rsp_field { + __be16 sense_data_len; + u8 desc_type; + u8 additional_len; + u8 hpb_type; + u8 reserved; + u8 active_rgn_cnt; + u8 inactive_rgn_cnt; + struct ufshpb_active_field hpb_active_field[2]; + __be16 hpb_inactive_field[2]; +} __packed; + +struct ufshpb_map_ctx { + struct page **m_page; + unsigned long *ppn_dirty; +}; + struct ufshpb_subregion { + struct ufshpb_map_ctx *mctx; enum HPB_SRGN_STATE srgn_state; int rgn_idx; int srgn_idx; + + /* below information is used by rsp_list */ + struct list_head list_act_srgn; }; struct ufshpb_region { @@ -112,6 +138,39 @@ struct ufshpb_region { enum HPB_RGN_STATE rgn_state; int rgn_idx; int srgn_cnt; + + /* below information is used by rsp_list */ + struct list_head list_inact_rgn; + + /* below information is used by lru */ + struct list_head list_lru_rgn; +}; + +/** + * struct ufshpb_req - UFSHPB READ BUFFER (for caching map) request structure + * @req: block layer request for READ BUFFER + * @bio: bio for holding map page + * @hpb: ufshpb_lu structure that related to the L2P map + * @mctx: L2P map information + * @rgn_idx: target region index + * @srgn_idx: target sub-region index + * @lun: target logical unit number + */ +struct ufshpb_req { + struct request *req; + struct bio *bio; + struct ufshpb_lu *hpb; + struct ufshpb_map_ctx *mctx; + + unsigned int rgn_idx; + unsigned int srgn_idx; + unsigned int lun; +}; + +struct victim_select_info { + struct list_head lh_lru_rgn; + int max_lru_active_cnt; /* supported hpb #region - pinned #region */ + atomic_t active_cnt; }; struct ufshpb_stats { @@ -134,6 +193,16 @@ struct ufshpb_lu { spinlock_t hpb_state_lock; atomic_t hpb_state; /* hpb_state_lock */ + spinlock_t rsp_list_lock; + struct list_head lh_act_srgn; /* rsp_list_lock */ + struct list_head lh_inact_rgn; /* rsp_list_lock */ + + /* cached L2P map management worker */ + struct work_struct map_work; + + /* for selecting victim */ + struct victim_select_info lru_info; + /* pinned region information */ u32 lu_pinned_start; u32 lu_pinned_end; @@ -152,6 +221,9 @@ struct ufshpb_lu { struct ufshpb_stats stats; + struct kmem_cache *map_req_cache; + struct kmem_cache *m_page_cache; + struct ufsf_feature_info *ufsf; struct list_head list_hpb_lu; };