--- /dev/null
- blk_execute_rq_nowait(req, true, ufshpb_umap_req_compl_fn);
+ // SPDX-License-Identifier: GPL-2.0
+ /*
+ * Universal Flash Storage Host Performance Booster
+ *
+ * Copyright (C) 2017-2021 Samsung Electronics Co., Ltd.
+ *
+ * Authors:
+ * Yongmyung Lee <ymhungry.lee@samsung.com>
+ * Jinyoung Choi <j-young.choi@samsung.com>
+ */
+
+ #include <asm/unaligned.h>
+ #include <linux/delay.h>
+ #include <linux/device.h>
+ #include <linux/module.h>
+ #include <scsi/scsi_cmnd.h>
+
+ #include "ufshcd-priv.h"
+ #include "ufshpb.h"
+ #include "../../scsi/sd.h"
+
+ #define ACTIVATION_THRESHOLD 8 /* 8 IOs */
+ #define READ_TO_MS 1000
+ #define READ_TO_EXPIRIES 100
+ #define POLLING_INTERVAL_MS 200
+ #define THROTTLE_MAP_REQ_DEFAULT 1
+
+ /* memory management */
+ static struct kmem_cache *ufshpb_mctx_cache;
+ static mempool_t *ufshpb_mctx_pool;
+ static mempool_t *ufshpb_page_pool;
+ /* A cache size of 2MB can cache ppn in the 1GB range. */
+ static unsigned int ufshpb_host_map_kbytes = 2048;
+ static int tot_active_srgn_pages;
+
+ static struct workqueue_struct *ufshpb_wq;
+
+ static void ufshpb_update_active_info(struct ufshpb_lu *hpb, int rgn_idx,
+ int srgn_idx);
+
+ bool ufshpb_is_allowed(struct ufs_hba *hba)
+ {
+ return !(hba->ufshpb_dev.hpb_disabled);
+ }
+
+ /* HPB version 1.0 is called as legacy version. */
+ bool ufshpb_is_legacy(struct ufs_hba *hba)
+ {
+ return hba->ufshpb_dev.is_legacy;
+ }
+
+ static struct ufshpb_lu *ufshpb_get_hpb_data(struct scsi_device *sdev)
+ {
+ return sdev->hostdata;
+ }
+
+ static int ufshpb_get_state(struct ufshpb_lu *hpb)
+ {
+ return atomic_read(&hpb->hpb_state);
+ }
+
+ static void ufshpb_set_state(struct ufshpb_lu *hpb, int state)
+ {
+ atomic_set(&hpb->hpb_state, state);
+ }
+
+ static int ufshpb_is_valid_srgn(struct ufshpb_region *rgn,
+ struct ufshpb_subregion *srgn)
+ {
+ return rgn->rgn_state != HPB_RGN_INACTIVE &&
+ srgn->srgn_state == HPB_SRGN_VALID;
+ }
+
+ static bool ufshpb_is_read_cmd(struct scsi_cmnd *cmd)
+ {
+ return req_op(scsi_cmd_to_rq(cmd)) == REQ_OP_READ;
+ }
+
+ static bool ufshpb_is_write_or_discard(struct scsi_cmnd *cmd)
+ {
+ return op_is_write(req_op(scsi_cmd_to_rq(cmd))) ||
+ op_is_discard(req_op(scsi_cmd_to_rq(cmd)));
+ }
+
+ static bool ufshpb_is_supported_chunk(struct ufshpb_lu *hpb, int transfer_len)
+ {
+ return transfer_len <= hpb->pre_req_max_tr_len;
+ }
+
+ static bool ufshpb_is_general_lun(int lun)
+ {
+ return lun < UFS_UPIU_MAX_UNIT_NUM_ID;
+ }
+
+ static bool ufshpb_is_pinned_region(struct ufshpb_lu *hpb, int rgn_idx)
+ {
+ return hpb->lu_pinned_end != PINNED_NOT_SET &&
+ rgn_idx >= hpb->lu_pinned_start && rgn_idx <= hpb->lu_pinned_end;
+ }
+
+ static void ufshpb_kick_map_work(struct ufshpb_lu *hpb)
+ {
+ bool ret = false;
+ unsigned long flags;
+
+ if (ufshpb_get_state(hpb) != HPB_PRESENT)
+ return;
+
+ spin_lock_irqsave(&hpb->rsp_list_lock, flags);
+ if (!list_empty(&hpb->lh_inact_rgn) || !list_empty(&hpb->lh_act_srgn))
+ ret = true;
+ spin_unlock_irqrestore(&hpb->rsp_list_lock, flags);
+
+ if (ret)
+ queue_work(ufshpb_wq, &hpb->map_work);
+ }
+
+ static bool ufshpb_is_hpb_rsp_valid(struct ufs_hba *hba,
+ struct ufshcd_lrb *lrbp,
+ struct utp_hpb_rsp *rsp_field)
+ {
+ /* Check HPB_UPDATE_ALERT */
+ if (!(lrbp->ucd_rsp_ptr->header.dword_2 &
+ UPIU_HEADER_DWORD(0, 2, 0, 0)))
+ return false;
+
+ 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->active_rgn_cnt > MAX_ACTIVE_NUM ||
+ rsp_field->inactive_rgn_cnt > MAX_INACTIVE_NUM ||
+ rsp_field->hpb_op == HPB_RSP_NONE ||
+ (rsp_field->hpb_op == HPB_RSP_REQ_REGION_UPDATE &&
+ !rsp_field->active_rgn_cnt && !rsp_field->inactive_rgn_cnt))
+ return false;
+
+ if (!ufshpb_is_general_lun(rsp_field->lun)) {
+ dev_warn(hba->dev, "ufshpb: lun(%d) not supported\n",
+ lrbp->lun);
+ return false;
+ }
+
+ return true;
+ }
+
+ static void ufshpb_iterate_rgn(struct ufshpb_lu *hpb, int rgn_idx, int srgn_idx,
+ int srgn_offset, int cnt, bool set_dirty)
+ {
+ struct ufshpb_region *rgn;
+ struct ufshpb_subregion *srgn, *prev_srgn = NULL;
+ int set_bit_len;
+ int bitmap_len;
+ unsigned long flags;
+
+ next_srgn:
+ rgn = hpb->rgn_tbl + rgn_idx;
+ srgn = rgn->srgn_tbl + srgn_idx;
+
+ if (likely(!srgn->is_last))
+ bitmap_len = hpb->entries_per_srgn;
+ else
+ bitmap_len = hpb->last_srgn_entries;
+
+ if ((srgn_offset + cnt) > bitmap_len)
+ set_bit_len = bitmap_len - srgn_offset;
+ else
+ set_bit_len = cnt;
+
+ spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+ if (rgn->rgn_state != HPB_RGN_INACTIVE) {
+ if (set_dirty) {
+ if (srgn->srgn_state == HPB_SRGN_VALID)
+ bitmap_set(srgn->mctx->ppn_dirty, srgn_offset,
+ set_bit_len);
+ } else if (hpb->is_hcm) {
+ /* rewind the read timer for lru regions */
+ rgn->read_timeout = ktime_add_ms(ktime_get(),
+ rgn->hpb->params.read_timeout_ms);
+ rgn->read_timeout_expiries =
+ rgn->hpb->params.read_timeout_expiries;
+ }
+ }
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+
+ if (hpb->is_hcm && prev_srgn != srgn) {
+ bool activate = false;
+
+ spin_lock(&rgn->rgn_lock);
+ if (set_dirty) {
+ rgn->reads -= srgn->reads;
+ srgn->reads = 0;
+ set_bit(RGN_FLAG_DIRTY, &rgn->rgn_flags);
+ } else {
+ srgn->reads++;
+ rgn->reads++;
+ if (srgn->reads == hpb->params.activation_thld)
+ activate = true;
+ }
+ spin_unlock(&rgn->rgn_lock);
+
+ if (activate ||
+ test_and_clear_bit(RGN_FLAG_UPDATE, &rgn->rgn_flags)) {
+ spin_lock_irqsave(&hpb->rsp_list_lock, flags);
+ ufshpb_update_active_info(hpb, rgn_idx, srgn_idx);
+ spin_unlock_irqrestore(&hpb->rsp_list_lock, flags);
+ dev_dbg(&hpb->sdev_ufs_lu->sdev_dev,
+ "activate region %d-%d\n", rgn_idx, srgn_idx);
+ }
+
+ prev_srgn = srgn;
+ }
+
+ srgn_offset = 0;
+ if (++srgn_idx == hpb->srgns_per_rgn) {
+ srgn_idx = 0;
+ rgn_idx++;
+ }
+
+ cnt -= set_bit_len;
+ if (cnt > 0)
+ goto next_srgn;
+ }
+
+ static bool ufshpb_test_ppn_dirty(struct ufshpb_lu *hpb, int rgn_idx,
+ int srgn_idx, int srgn_offset, int cnt)
+ {
+ struct ufshpb_region *rgn;
+ struct ufshpb_subregion *srgn;
+ int bitmap_len;
+ int bit_len;
+
+ next_srgn:
+ rgn = hpb->rgn_tbl + rgn_idx;
+ srgn = rgn->srgn_tbl + srgn_idx;
+
+ if (likely(!srgn->is_last))
+ bitmap_len = hpb->entries_per_srgn;
+ else
+ bitmap_len = hpb->last_srgn_entries;
+
+ if (!ufshpb_is_valid_srgn(rgn, srgn))
+ return true;
+
+ /*
+ * If the region state is active, mctx must be allocated.
+ * In this case, check whether the region is evicted or
+ * mctx allocation fail.
+ */
+ if (unlikely(!srgn->mctx)) {
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "no mctx in region %d subregion %d.\n",
+ srgn->rgn_idx, srgn->srgn_idx);
+ return true;
+ }
+
+ if ((srgn_offset + cnt) > bitmap_len)
+ bit_len = bitmap_len - srgn_offset;
+ else
+ bit_len = cnt;
+
+ if (find_next_bit(srgn->mctx->ppn_dirty, bit_len + srgn_offset,
+ srgn_offset) < bit_len + srgn_offset)
+ return true;
+
+ srgn_offset = 0;
+ if (++srgn_idx == hpb->srgns_per_rgn) {
+ srgn_idx = 0;
+ rgn_idx++;
+ }
+
+ cnt -= bit_len;
+ if (cnt > 0)
+ goto next_srgn;
+
+ return false;
+ }
+
+ static inline bool is_rgn_dirty(struct ufshpb_region *rgn)
+ {
+ return test_bit(RGN_FLAG_DIRTY, &rgn->rgn_flags);
+ }
+
+ static int ufshpb_fill_ppn_from_page(struct ufshpb_lu *hpb,
+ struct ufshpb_map_ctx *mctx, int pos,
+ int len, __be64 *ppn_buf)
+ {
+ struct page *page;
+ int index, offset;
+ int copied;
+
+ index = pos / (PAGE_SIZE / HPB_ENTRY_SIZE);
+ offset = pos % (PAGE_SIZE / HPB_ENTRY_SIZE);
+
+ if ((offset + len) <= (PAGE_SIZE / HPB_ENTRY_SIZE))
+ copied = len;
+ else
+ copied = (PAGE_SIZE / HPB_ENTRY_SIZE) - offset;
+
+ page = mctx->m_page[index];
+ if (unlikely(!page)) {
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "error. cannot find page in mctx\n");
+ return -ENOMEM;
+ }
+
+ memcpy(ppn_buf, page_address(page) + (offset * HPB_ENTRY_SIZE),
+ copied * HPB_ENTRY_SIZE);
+
+ return copied;
+ }
+
+ static void
+ ufshpb_get_pos_from_lpn(struct ufshpb_lu *hpb, unsigned long lpn, int *rgn_idx,
+ int *srgn_idx, int *offset)
+ {
+ int rgn_offset;
+
+ *rgn_idx = lpn >> hpb->entries_per_rgn_shift;
+ rgn_offset = lpn & hpb->entries_per_rgn_mask;
+ *srgn_idx = rgn_offset >> hpb->entries_per_srgn_shift;
+ *offset = rgn_offset & hpb->entries_per_srgn_mask;
+ }
+
+ static void
+ ufshpb_set_hpb_read_to_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp,
+ __be64 ppn, u8 transfer_len)
+ {
+ unsigned char *cdb = lrbp->cmd->cmnd;
+ __be64 ppn_tmp = ppn;
+ cdb[0] = UFSHPB_READ;
+
+ if (hba->dev_quirks & UFS_DEVICE_QUIRK_SWAP_L2P_ENTRY_FOR_HPB_READ)
+ ppn_tmp = (__force __be64)swab64((__force u64)ppn);
+
+ /* ppn value is stored as big-endian in the host memory */
+ memcpy(&cdb[6], &ppn_tmp, sizeof(__be64));
+ cdb[14] = transfer_len;
+ cdb[15] = 0;
+
+ lrbp->cmd->cmd_len = UFS_CDB_SIZE;
+ }
+
+ /*
+ * This function will set up HPB read command using host-side L2P map data.
+ */
+ int ufshpb_prep(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+ {
+ struct ufshpb_lu *hpb;
+ struct ufshpb_region *rgn;
+ struct ufshpb_subregion *srgn;
+ struct scsi_cmnd *cmd = lrbp->cmd;
+ u32 lpn;
+ __be64 ppn;
+ unsigned long flags;
+ int transfer_len, rgn_idx, srgn_idx, srgn_offset;
+ int err = 0;
+
+ hpb = ufshpb_get_hpb_data(cmd->device);
+ if (!hpb)
+ return -ENODEV;
+
+ if (ufshpb_get_state(hpb) == HPB_INIT)
+ return -ENODEV;
+
+ if (ufshpb_get_state(hpb) != HPB_PRESENT) {
+ dev_notice(&hpb->sdev_ufs_lu->sdev_dev,
+ "%s: ufshpb state is not PRESENT", __func__);
+ return -ENODEV;
+ }
+
+ if (blk_rq_is_passthrough(scsi_cmd_to_rq(cmd)) ||
+ (!ufshpb_is_write_or_discard(cmd) &&
+ !ufshpb_is_read_cmd(cmd)))
+ return 0;
+
+ transfer_len = sectors_to_logical(cmd->device,
+ blk_rq_sectors(scsi_cmd_to_rq(cmd)));
+ if (unlikely(!transfer_len))
+ return 0;
+
+ lpn = sectors_to_logical(cmd->device, blk_rq_pos(scsi_cmd_to_rq(cmd)));
+ ufshpb_get_pos_from_lpn(hpb, lpn, &rgn_idx, &srgn_idx, &srgn_offset);
+ rgn = hpb->rgn_tbl + rgn_idx;
+ srgn = rgn->srgn_tbl + srgn_idx;
+
+ /* If command type is WRITE or DISCARD, set bitmap as drity */
+ if (ufshpb_is_write_or_discard(cmd)) {
+ ufshpb_iterate_rgn(hpb, rgn_idx, srgn_idx, srgn_offset,
+ transfer_len, true);
+ return 0;
+ }
+
+ if (!ufshpb_is_supported_chunk(hpb, transfer_len))
+ return 0;
+
+ if (hpb->is_hcm) {
+ /*
+ * in host control mode, reads are the main source for
+ * activation trials.
+ */
+ ufshpb_iterate_rgn(hpb, rgn_idx, srgn_idx, srgn_offset,
+ transfer_len, false);
+
+ /* keep those counters normalized */
+ if (rgn->reads > hpb->entries_per_srgn)
+ schedule_work(&hpb->ufshpb_normalization_work);
+ }
+
+ spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+ if (ufshpb_test_ppn_dirty(hpb, rgn_idx, srgn_idx, srgn_offset,
+ transfer_len)) {
+ hpb->stats.miss_cnt++;
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+ return 0;
+ }
+
+ err = ufshpb_fill_ppn_from_page(hpb, srgn->mctx, srgn_offset, 1, &ppn);
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+ if (unlikely(err < 0)) {
+ /*
+ * In this case, the region state is active,
+ * but the ppn table is not allocated.
+ * Make sure that ppn table must be allocated on
+ * active state.
+ */
+ dev_err(hba->dev, "get ppn failed. err %d\n", err);
+ return err;
+ }
+
+ ufshpb_set_hpb_read_to_upiu(hba, lrbp, ppn, transfer_len);
+
+ hpb->stats.hit_cnt++;
+ return 0;
+ }
+
+ static struct ufshpb_req *ufshpb_get_req(struct ufshpb_lu *hpb,
+ int rgn_idx, enum req_opf dir,
+ bool atomic)
+ {
+ struct ufshpb_req *rq;
+ struct request *req;
+ int retries = HPB_MAP_REQ_RETRIES;
+
+ rq = kmem_cache_alloc(hpb->map_req_cache, GFP_KERNEL);
+ if (!rq)
+ return NULL;
+
+ retry:
+ req = blk_mq_alloc_request(hpb->sdev_ufs_lu->request_queue, dir,
+ BLK_MQ_REQ_NOWAIT);
+
+ if (!atomic && (PTR_ERR(req) == -EWOULDBLOCK) && (--retries > 0)) {
+ usleep_range(3000, 3100);
+ goto retry;
+ }
+
+ if (IS_ERR(req))
+ goto free_rq;
+
+ rq->hpb = hpb;
+ rq->req = req;
+ rq->rb.rgn_idx = rgn_idx;
+
+ return rq;
+
+ free_rq:
+ kmem_cache_free(hpb->map_req_cache, rq);
+ return NULL;
+ }
+
+ static void ufshpb_put_req(struct ufshpb_lu *hpb, struct ufshpb_req *rq)
+ {
+ blk_mq_free_request(rq->req);
+ kmem_cache_free(hpb->map_req_cache, rq);
+ }
+
+ static struct ufshpb_req *ufshpb_get_map_req(struct ufshpb_lu *hpb,
+ struct ufshpb_subregion *srgn)
+ {
+ struct ufshpb_req *map_req;
+ struct bio *bio;
+ unsigned long flags;
+
+ if (hpb->is_hcm &&
+ hpb->num_inflight_map_req >= hpb->params.inflight_map_req) {
+ dev_info(&hpb->sdev_ufs_lu->sdev_dev,
+ "map_req throttle. inflight %d throttle %d",
+ hpb->num_inflight_map_req,
+ hpb->params.inflight_map_req);
+ return NULL;
+ }
+
+ map_req = ufshpb_get_req(hpb, srgn->rgn_idx, REQ_OP_DRV_IN, false);
+ if (!map_req)
+ return NULL;
+
+ bio = bio_alloc(NULL, hpb->pages_per_srgn, 0, GFP_KERNEL);
+ if (!bio) {
+ ufshpb_put_req(hpb, map_req);
+ return NULL;
+ }
+
+ map_req->bio = bio;
+
+ map_req->rb.srgn_idx = srgn->srgn_idx;
+ map_req->rb.mctx = srgn->mctx;
+
+ spin_lock_irqsave(&hpb->param_lock, flags);
+ hpb->num_inflight_map_req++;
+ spin_unlock_irqrestore(&hpb->param_lock, flags);
+
+ return map_req;
+ }
+
+ static void ufshpb_put_map_req(struct ufshpb_lu *hpb,
+ struct ufshpb_req *map_req)
+ {
+ unsigned long flags;
+
+ bio_put(map_req->bio);
+ ufshpb_put_req(hpb, map_req);
+
+ spin_lock_irqsave(&hpb->param_lock, flags);
+ hpb->num_inflight_map_req--;
+ spin_unlock_irqrestore(&hpb->param_lock, flags);
+ }
+
+ static int ufshpb_clear_dirty_bitmap(struct ufshpb_lu *hpb,
+ struct ufshpb_subregion *srgn)
+ {
+ struct ufshpb_region *rgn;
+ u32 num_entries = hpb->entries_per_srgn;
+
+ if (!srgn->mctx) {
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "no mctx in region %d subregion %d.\n",
+ srgn->rgn_idx, srgn->srgn_idx);
+ return -1;
+ }
+
+ if (unlikely(srgn->is_last))
+ num_entries = hpb->last_srgn_entries;
+
+ bitmap_zero(srgn->mctx->ppn_dirty, num_entries);
+
+ rgn = hpb->rgn_tbl + srgn->rgn_idx;
+ clear_bit(RGN_FLAG_DIRTY, &rgn->rgn_flags);
+
+ 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);
+
+ hpb->stats.rcmd_active_cnt++;
+ }
+
+ 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_each_sub_region(rgn, srgn_idx, srgn)
+ 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);
+
+ hpb->stats.rcmd_inactive_cnt++;
+ }
+
+ 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.
+ * Make sure the region must not evict in I/O progress
+ */
+ if (!srgn->mctx) {
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "no mctx in region %d subregion %d.\n",
+ srgn->rgn_idx, srgn->srgn_idx);
+ srgn->srgn_state = HPB_SRGN_INVALID;
+ return;
+ }
+
+ rgn = hpb->rgn_tbl + srgn->rgn_idx;
+
+ if (unlikely(rgn->rgn_state == HPB_RGN_INACTIVE)) {
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "region %d subregion %d evicted\n",
+ srgn->rgn_idx, srgn->srgn_idx);
+ srgn->srgn_state = HPB_SRGN_INVALID;
+ return;
+ }
+ srgn->srgn_state = HPB_SRGN_VALID;
+ }
+
+ static void ufshpb_umap_req_compl_fn(struct request *req, blk_status_t error)
+ {
+ struct ufshpb_req *umap_req = (struct ufshpb_req *)req->end_io_data;
+
+ ufshpb_put_req(umap_req->hpb, umap_req);
+ }
+
+ 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->rb.rgn_idx].srgn_tbl +
+ map_req->rb.srgn_idx;
+
+ ufshpb_clear_dirty_bitmap(hpb, srgn);
+ spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+ ufshpb_activate_subregion(hpb, srgn);
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+
+ ufshpb_put_map_req(map_req->hpb, map_req);
+ }
+
+ static void ufshpb_set_unmap_cmd(unsigned char *cdb, struct ufshpb_region *rgn)
+ {
+ cdb[0] = UFSHPB_WRITE_BUFFER;
+ cdb[1] = rgn ? UFSHPB_WRITE_BUFFER_INACT_SINGLE_ID :
+ UFSHPB_WRITE_BUFFER_INACT_ALL_ID;
+ if (rgn)
+ put_unaligned_be16(rgn->rgn_idx, &cdb[2]);
+ cdb[9] = 0x00;
+ }
+
+ static 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 void ufshpb_execute_umap_req(struct ufshpb_lu *hpb,
+ struct ufshpb_req *umap_req,
+ struct ufshpb_region *rgn)
+ {
+ struct request *req = umap_req->req;
+ struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
+
+ req->timeout = 0;
+ req->end_io_data = umap_req;
++ req->end_io = ufshpb_umap_req_compl_fn;
+
+ ufshpb_set_unmap_cmd(scmd->cmnd, rgn);
+ scmd->cmd_len = HPB_WRITE_BUFFER_CMD_LENGTH;
+
- blk_execute_rq_nowait(req, true, ufshpb_map_req_compl_fn);
++ blk_execute_rq_nowait(req, true);
+
+ hpb->stats.umap_req_cnt++;
+ }
+
+ static int ufshpb_execute_map_req(struct ufshpb_lu *hpb,
+ struct ufshpb_req *map_req, bool last)
+ {
+ struct request_queue *q;
+ struct request *req;
+ struct scsi_cmnd *scmd;
+ int mem_size = hpb->srgn_mem_size;
+ int ret = 0;
+ int i;
+
+ q = hpb->sdev_ufs_lu->request_queue;
+ for (i = 0; i < hpb->pages_per_srgn; i++) {
+ ret = bio_add_pc_page(q, map_req->bio, map_req->rb.mctx->m_page[i],
+ PAGE_SIZE, 0);
+ if (ret != PAGE_SIZE) {
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "bio_add_pc_page fail %d - %d\n",
+ map_req->rb.rgn_idx, map_req->rb.srgn_idx);
+ return ret;
+ }
+ }
+
+ req = map_req->req;
+
+ blk_rq_append_bio(req, map_req->bio);
+
+ req->end_io_data = map_req;
++ req->end_io = ufshpb_map_req_compl_fn;
+
+ if (unlikely(last))
+ mem_size = hpb->last_srgn_entries * HPB_ENTRY_SIZE;
+
+ scmd = blk_mq_rq_to_pdu(req);
+ ufshpb_set_read_buf_cmd(scmd->cmnd, map_req->rb.rgn_idx,
+ map_req->rb.srgn_idx, mem_size);
+ scmd->cmd_len = HPB_READ_BUFFER_CMD_LENGTH;
+
- 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(hpb->lun))
- return;
-
- ufshpb_kick_map_work(hpb);
- return;
- }
-
++ blk_execute_rq_nowait(req, true);
+
+ hpb->stats.map_req_cnt++;
+ return 0;
+ }
+
+ static struct ufshpb_map_ctx *ufshpb_get_map_ctx(struct ufshpb_lu *hpb,
+ bool last)
+ {
+ struct ufshpb_map_ctx *mctx;
+ u32 num_entries = hpb->entries_per_srgn;
+ int i, j;
+
+ mctx = mempool_alloc(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;
+
+ if (unlikely(last))
+ num_entries = hpb->last_srgn_entries;
+
+ mctx->ppn_dirty = bitmap_zalloc(num_entries, 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_page_pool, GFP_KERNEL);
+ if (!mctx->m_page[i]) {
+ for (j = 0; j < i; j++)
+ mempool_free(mctx->m_page[j], 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_mctx_pool);
+ return NULL;
+ }
+
+ static 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_page_pool);
+
+ bitmap_free(mctx->ppn_dirty);
+ kmem_cache_free(hpb->m_page_cache, mctx->m_page);
+ mempool_free(mctx, ufshpb_mctx_pool);
+ }
+
+ static int ufshpb_check_srgns_issue_state(struct ufshpb_lu *hpb,
+ struct ufshpb_region *rgn)
+ {
+ struct ufshpb_subregion *srgn;
+ int srgn_idx;
+
+ for_each_sub_region(rgn, srgn_idx, srgn)
+ if (srgn->srgn_state == HPB_SRGN_ISSUED)
+ return -EPERM;
+
+ return 0;
+ }
+
+ static void ufshpb_read_to_handler(struct work_struct *work)
+ {
+ struct ufshpb_lu *hpb = container_of(work, struct ufshpb_lu,
+ ufshpb_read_to_work.work);
+ struct victim_select_info *lru_info = &hpb->lru_info;
+ struct ufshpb_region *rgn, *next_rgn;
+ unsigned long flags;
+ unsigned int poll;
+ LIST_HEAD(expired_list);
+
+ if (test_and_set_bit(TIMEOUT_WORK_RUNNING, &hpb->work_data_bits))
+ return;
+
+ spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+
+ list_for_each_entry_safe(rgn, next_rgn, &lru_info->lh_lru_rgn,
+ list_lru_rgn) {
+ bool timedout = ktime_after(ktime_get(), rgn->read_timeout);
+
+ if (timedout) {
+ rgn->read_timeout_expiries--;
+ if (is_rgn_dirty(rgn) ||
+ rgn->read_timeout_expiries == 0)
+ list_add(&rgn->list_expired_rgn, &expired_list);
+ else
+ rgn->read_timeout = ktime_add_ms(ktime_get(),
+ hpb->params.read_timeout_ms);
+ }
+ }
+
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+
+ list_for_each_entry_safe(rgn, next_rgn, &expired_list,
+ list_expired_rgn) {
+ list_del_init(&rgn->list_expired_rgn);
+ spin_lock_irqsave(&hpb->rsp_list_lock, flags);
+ ufshpb_update_inactive_info(hpb, rgn->rgn_idx);
+ spin_unlock_irqrestore(&hpb->rsp_list_lock, flags);
+ }
+
+ ufshpb_kick_map_work(hpb);
+
+ clear_bit(TIMEOUT_WORK_RUNNING, &hpb->work_data_bits);
+
+ poll = hpb->params.timeout_polling_interval_ms;
+ schedule_delayed_work(&hpb->ufshpb_read_to_work,
+ msecs_to_jiffies(poll));
+ }
+
+ static 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);
+ if (rgn->hpb->is_hcm) {
+ rgn->read_timeout =
+ ktime_add_ms(ktime_get(),
+ rgn->hpb->params.read_timeout_ms);
+ rgn->read_timeout_expiries =
+ rgn->hpb->params.read_timeout_expiries;
+ }
+ }
+
+ static 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) {
+ if (ufshpb_check_srgns_issue_state(hpb, rgn))
+ continue;
+
+ /*
+ * in host control mode, verify that the exiting region
+ * has fewer reads
+ */
+ if (hpb->is_hcm &&
+ rgn->reads > hpb->params.eviction_thld_exit)
+ continue;
+
+ victim_rgn = rgn;
+ break;
+ }
+
+ if (!victim_rgn)
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "%s: no region allocated\n",
+ __func__);
+
+ return victim_rgn;
+ }
+
+ static 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 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 int ufshpb_issue_umap_req(struct ufshpb_lu *hpb,
+ struct ufshpb_region *rgn,
+ bool atomic)
+ {
+ struct ufshpb_req *umap_req;
+ int rgn_idx = rgn ? rgn->rgn_idx : 0;
+
+ umap_req = ufshpb_get_req(hpb, rgn_idx, REQ_OP_DRV_OUT, atomic);
+ if (!umap_req)
+ return -ENOMEM;
+
+ ufshpb_execute_umap_req(hpb, umap_req, rgn);
+
+ return 0;
+ }
+
+ static int ufshpb_issue_umap_single_req(struct ufshpb_lu *hpb,
+ struct ufshpb_region *rgn)
+ {
+ return ufshpb_issue_umap_req(hpb, rgn, true);
+ }
+
+ 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->sdev_ufs_lu->sdev_dev, "evict region %d\n", rgn->rgn_idx);
+
+ ufshpb_cleanup_lru_info(lru_info, rgn);
+
+ for_each_sub_region(rgn, srgn_idx, srgn)
+ 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->rgn_state_lock, flags);
+ if (rgn->rgn_state == HPB_RGN_PINNED) {
+ dev_warn(&hpb->sdev_ufs_lu->sdev_dev,
+ "pinned region cannot drop-out. region %d\n",
+ rgn->rgn_idx);
+ goto out;
+ }
+
+ if (!list_empty(&rgn->list_lru_rgn)) {
+ if (ufshpb_check_srgns_issue_state(hpb, rgn)) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (hpb->is_hcm) {
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+ ret = ufshpb_issue_umap_single_req(hpb, rgn);
+ spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+ if (ret)
+ goto out;
+ }
+
+ __ufshpb_evict_region(hpb, rgn);
+ }
+ out:
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+ return ret;
+ }
+
+ 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_SRGN_STATE state = HPB_SRGN_INVALID;
+
+ spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+
+ if (ufshpb_get_state(hpb) != HPB_PRESENT) {
+ dev_notice(&hpb->sdev_ufs_lu->sdev_dev,
+ "%s: ufshpb state is not PRESENT\n", __func__);
+ goto unlock_out;
+ }
+
+ if ((rgn->rgn_state == HPB_RGN_INACTIVE) &&
+ (srgn->srgn_state == HPB_SRGN_INVALID)) {
+ err = 0;
+ goto unlock_out;
+ }
+
+ 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->rgn_state_lock, flags);
+
+ if (alloc_required) {
+ srgn->mctx = ufshpb_get_map_ctx(hpb, srgn->is_last);
+ if (!srgn->mctx) {
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "get map_ctx failed. region %d - %d\n",
+ rgn->rgn_idx, srgn->srgn_idx);
+ state = HPB_SRGN_UNUSED;
+ goto change_srgn_state;
+ }
+ }
+
+ map_req = ufshpb_get_map_req(hpb, srgn);
+ if (!map_req)
+ goto change_srgn_state;
+
+
+ ret = ufshpb_execute_map_req(hpb, map_req, srgn->is_last);
+ if (ret) {
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "%s: issue map_req failed: %d, region %d - %d\n",
+ __func__, ret, srgn->rgn_idx, srgn->srgn_idx);
+ goto free_map_req;
+ }
+ return 0;
+
+ free_map_req:
+ ufshpb_put_map_req(hpb, map_req);
+ change_srgn_state:
+ spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+ srgn->srgn_state = state;
+ unlock_out:
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+ return err;
+ }
+
+ static int ufshpb_add_region(struct ufshpb_lu *hpb, struct ufshpb_region *rgn)
+ {
+ struct ufshpb_region *victim_rgn = NULL;
+ struct victim_select_info *lru_info = &hpb->lru_info;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&hpb->rgn_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
+ *
+ * in host control mode, verify that the entering
+ * region has enough reads
+ */
+ if (hpb->is_hcm &&
+ rgn->reads < hpb->params.eviction_thld_enter) {
+ ret = -EACCES;
+ goto out;
+ }
+
+ victim_rgn = ufshpb_victim_lru_info(hpb);
+ if (!victim_rgn) {
+ dev_warn(&hpb->sdev_ufs_lu->sdev_dev,
+ "cannot get victim region %s\n",
+ hpb->is_hcm ? "" : "error");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ dev_dbg(&hpb->sdev_ufs_lu->sdev_dev,
+ "LRU full (%d), choose victim %d\n",
+ atomic_read(&lru_info->active_cnt),
+ victim_rgn->rgn_idx);
+
+ if (hpb->is_hcm) {
+ spin_unlock_irqrestore(&hpb->rgn_state_lock,
+ flags);
+ ret = ufshpb_issue_umap_single_req(hpb,
+ victim_rgn);
+ spin_lock_irqsave(&hpb->rgn_state_lock,
+ flags);
+ if (ret)
+ goto out;
+ }
+
+ __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->rgn_state_lock, flags);
+ return ret;
+ }
+ /**
+ *ufshpb_submit_region_inactive() - submit a region to be inactivated later
+ *@hpb: per-LU HPB instance
+ *@region_index: the index associated with the region that will be inactivated later
+ */
+ static void ufshpb_submit_region_inactive(struct ufshpb_lu *hpb, int region_index)
+ {
+ int subregion_index;
+ struct ufshpb_region *rgn;
+ struct ufshpb_subregion *srgn;
+
+ /*
+ * Remove this region from active region list and add it to inactive list
+ */
+ spin_lock(&hpb->rsp_list_lock);
+ ufshpb_update_inactive_info(hpb, region_index);
+ spin_unlock(&hpb->rsp_list_lock);
+
+ rgn = hpb->rgn_tbl + region_index;
+
+ /*
+ * Set subregion state to be HPB_SRGN_INVALID, there will no HPB read on this subregion
+ */
+ spin_lock(&hpb->rgn_state_lock);
+ if (rgn->rgn_state != HPB_RGN_INACTIVE) {
+ for (subregion_index = 0; subregion_index < rgn->srgn_cnt; subregion_index++) {
+ srgn = rgn->srgn_tbl + subregion_index;
+ if (srgn->srgn_state == HPB_SRGN_VALID)
+ srgn->srgn_state = HPB_SRGN_INVALID;
+ }
+ }
+ spin_unlock(&hpb->rgn_state_lock);
+ }
+
+ static void ufshpb_rsp_req_region_update(struct ufshpb_lu *hpb,
+ struct utp_hpb_rsp *rsp_field)
+ {
+ struct ufshpb_region *rgn;
+ struct ufshpb_subregion *srgn;
+ int i, rgn_i, srgn_i;
+
+ BUILD_BUG_ON(sizeof(struct ufshpb_active_field) != HPB_ACT_FIELD_SIZE);
+ /*
+ * 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
+ */
+ for (i = 0; i < rsp_field->active_rgn_cnt; i++) {
+ rgn_i =
+ be16_to_cpu(rsp_field->hpb_active_field[i].active_rgn);
+ srgn_i =
+ be16_to_cpu(rsp_field->hpb_active_field[i].active_srgn);
+
+ rgn = hpb->rgn_tbl + rgn_i;
+ if (hpb->is_hcm &&
+ (rgn->rgn_state != HPB_RGN_ACTIVE || is_rgn_dirty(rgn))) {
+ /*
+ * in host control mode, subregion activation
+ * recommendations are only allowed to active regions.
+ * Also, ignore recommendations for dirty regions - the
+ * host will make decisions concerning those by himself
+ */
+ continue;
+ }
+
+ dev_dbg(&hpb->sdev_ufs_lu->sdev_dev,
+ "activate(%d) region %d - %d\n", i, rgn_i, srgn_i);
+
+ spin_lock(&hpb->rsp_list_lock);
+ ufshpb_update_active_info(hpb, rgn_i, srgn_i);
+ spin_unlock(&hpb->rsp_list_lock);
+
+ srgn = rgn->srgn_tbl + srgn_i;
+
+ /* blocking HPB_READ */
+ spin_lock(&hpb->rgn_state_lock);
+ if (srgn->srgn_state == HPB_SRGN_VALID)
+ srgn->srgn_state = HPB_SRGN_INVALID;
+ spin_unlock(&hpb->rgn_state_lock);
+ }
+
+ if (hpb->is_hcm) {
+ /*
+ * in host control mode the device is not allowed to inactivate
+ * regions
+ */
+ goto out;
+ }
+
+ for (i = 0; i < rsp_field->inactive_rgn_cnt; i++) {
+ rgn_i = be16_to_cpu(rsp_field->hpb_inactive_field[i]);
+ dev_dbg(&hpb->sdev_ufs_lu->sdev_dev, "inactivate(%d) region %d\n", i, rgn_i);
+ ufshpb_submit_region_inactive(hpb, rgn_i);
+ }
+
+ out:
+ dev_dbg(&hpb->sdev_ufs_lu->sdev_dev, "Noti: #ACT %u #INACT %u\n",
+ rsp_field->active_rgn_cnt, rsp_field->inactive_rgn_cnt);
+
+ if (ufshpb_get_state(hpb) == HPB_PRESENT)
+ queue_work(ufshpb_wq, &hpb->map_work);
+ }
+
+ /*
+ * Set the flags of all active regions to RGN_FLAG_UPDATE to let host side reload L2P entries later
+ */
+ static void ufshpb_set_regions_update(struct ufshpb_lu *hpb)
+ {
+ struct victim_select_info *lru_info = &hpb->lru_info;
+ struct ufshpb_region *rgn;
+ unsigned long flags;
+
+ spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+
+ list_for_each_entry(rgn, &lru_info->lh_lru_rgn, list_lru_rgn)
+ set_bit(RGN_FLAG_UPDATE, &rgn->rgn_flags);
+
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+ }
+
+ static void ufshpb_dev_reset_handler(struct ufs_hba *hba)
+ {
+ struct scsi_device *sdev;
+ struct ufshpb_lu *hpb;
+
+ __shost_for_each_device(sdev, hba->host) {
+ hpb = ufshpb_get_hpb_data(sdev);
+ if (!hpb)
+ continue;
+
+ if (hpb->is_hcm) {
+ /*
+ * For the HPB host control mode, in case device powered up and lost HPB
+ * information, we will set the region flag to be RGN_FLAG_UPDATE, it will
+ * let host reload its L2P entries(reactivate region in the UFS device).
+ */
+ ufshpb_set_regions_update(hpb);
+ } else {
+ /*
+ * For the HPB device control mode, if host side receives 02h:HPB Operation
+ * in UPIU response, which means device recommends the host side should
+ * inactivate all active regions. Here we add all active regions to inactive
+ * list, they will be inactivated later in ufshpb_map_work_handler().
+ */
+ struct victim_select_info *lru_info = &hpb->lru_info;
+ struct ufshpb_region *rgn;
+
+ list_for_each_entry(rgn, &lru_info->lh_lru_rgn, list_lru_rgn)
+ ufshpb_submit_region_inactive(hpb, rgn->rgn_idx);
+
+ if (ufshpb_get_state(hpb) == HPB_PRESENT)
+ queue_work(ufshpb_wq, &hpb->map_work);
+ }
+ }
+ }
+
+ /*
+ * This function will parse recommended active subregion information in sense
+ * data field of response UPIU with SAM_STAT_GOOD state.
+ */
+ void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+ {
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(lrbp->cmd->device);
+ struct utp_hpb_rsp *rsp_field = &lrbp->ucd_rsp_ptr->hr;
+ int data_seg_len;
+
++ data_seg_len = be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_2)
++ & MASK_RSP_UPIU_DATA_SEG_LEN;
++
++ /* If data segment length is zero, rsp_field is not valid */
++ if (!data_seg_len)
++ return;
++
+ if (unlikely(lrbp->lun != rsp_field->lun)) {
+ struct scsi_device *sdev;
+ bool found = false;
+
+ __shost_for_each_device(sdev, hba->host) {
+ hpb = ufshpb_get_hpb_data(sdev);
+
+ if (!hpb)
+ continue;
+
+ if (rsp_field->lun == hpb->lun) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found)
+ return;
+ }
+
+ if (!hpb)
+ return;
+
+ if (ufshpb_get_state(hpb) == HPB_INIT)
+ return;
+
+ if ((ufshpb_get_state(hpb) != HPB_PRESENT) &&
+ (ufshpb_get_state(hpb) != HPB_SUSPEND)) {
+ dev_notice(&hpb->sdev_ufs_lu->sdev_dev,
+ "%s: ufshpb state is not PRESENT/SUSPEND\n",
+ __func__);
+ return;
+ }
+
+ BUILD_BUG_ON(sizeof(struct utp_hpb_rsp) != UTP_HPB_RSP_SIZE);
+
+ if (!ufshpb_is_hpb_rsp_valid(hba, lrbp, rsp_field))
+ return;
+
+ hpb->stats.rcmd_noti_cnt++;
+
+ switch (rsp_field->hpb_op) {
+ case HPB_RSP_REQ_REGION_UPDATE:
+ if (data_seg_len != DEV_DATA_SEG_LEN)
+ dev_warn(&hpb->sdev_ufs_lu->sdev_dev,
+ "%s: data seg length is not same.\n",
+ __func__);
+ ufshpb_rsp_req_region_update(hpb, rsp_field);
+ break;
+ case HPB_RSP_DEV_RESET:
+ dev_warn(&hpb->sdev_ufs_lu->sdev_dev,
+ "UFS device lost HPB information during PM.\n");
+ ufshpb_dev_reset_handler(hba);
+
+ break;
+ default:
+ dev_notice(&hpb->sdev_ufs_lu->sdev_dev,
+ "hpb_op is not available: %d\n",
+ rsp_field->hpb_op);
+ break;
+ }
+ }
+
+ 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_each_sub_region(rgn, srgn_idx, srgn)
+ 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))) {
+ if (ufshpb_get_state(hpb) == HPB_SUSPEND)
+ break;
+
+ 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)
+ goto active_failed;
+
+ ret = ufshpb_issue_map_req(hpb, rgn, srgn);
+ if (ret) {
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev,
+ "issue map_req failed. ret %d, region %d - %d\n",
+ ret, rgn->rgn_idx, srgn->srgn_idx);
+ goto active_failed;
+ }
+ spin_lock_irqsave(&hpb->rsp_list_lock, flags);
+ }
+ spin_unlock_irqrestore(&hpb->rsp_list_lock, flags);
+ return;
+
+ active_failed:
+ dev_err(&hpb->sdev_ufs_lu->sdev_dev, "failed to activate 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))) {
+ if (ufshpb_get_state(hpb) == HPB_SUSPEND)
+ break;
+
+ 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_normalization_work_handler(struct work_struct *work)
+ {
+ struct ufshpb_lu *hpb = container_of(work, struct ufshpb_lu,
+ ufshpb_normalization_work);
+ int rgn_idx;
+ u8 factor = hpb->params.normalization_factor;
+
+ for (rgn_idx = 0; rgn_idx < hpb->rgns_per_lu; rgn_idx++) {
+ struct ufshpb_region *rgn = hpb->rgn_tbl + rgn_idx;
+ int srgn_idx;
+
+ spin_lock(&rgn->rgn_lock);
+ rgn->reads = 0;
+ for (srgn_idx = 0; srgn_idx < hpb->srgns_per_rgn; srgn_idx++) {
+ struct ufshpb_subregion *srgn = rgn->srgn_tbl + srgn_idx;
+
+ srgn->reads >>= factor;
+ rgn->reads += srgn->reads;
+ }
+ spin_unlock(&rgn->rgn_lock);
+
+ if (rgn->rgn_state != HPB_RGN_ACTIVE || rgn->reads)
+ continue;
+
+ /* if region is active but has no reads - inactivate it */
+ spin_lock(&hpb->rsp_list_lock);
+ ufshpb_update_inactive_info(hpb, rgn->rgn_idx);
+ spin_unlock(&hpb->rsp_list_lock);
+ }
+ }
+
+ static void ufshpb_map_work_handler(struct work_struct *work)
+ {
+ struct ufshpb_lu *hpb = container_of(work, struct ufshpb_lu, map_work);
+
+ if (ufshpb_get_state(hpb) != HPB_PRESENT) {
+ dev_notice(&hpb->sdev_ufs_lu->sdev_dev,
+ "%s: ufshpb state is not PRESENT\n", __func__);
+ return;
+ }
+
+ ufshpb_run_inactive_region_list(hpb);
+ ufshpb_run_active_subregion_list(hpb);
+ }
+
+ /*
+ * this function doesn't need to hold lock due to be called in init.
+ * (rgn_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_each_sub_region(rgn, srgn_idx, srgn) {
+ srgn->mctx = ufshpb_get_map_ctx(hpb, srgn->is_last);
+ srgn->srgn_state = HPB_SRGN_INVALID;
+ if (!srgn->mctx) {
+ err = -ENOMEM;
+ 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, bool last)
+ {
+ int srgn_idx;
+ struct ufshpb_subregion *srgn;
+
+ for_each_sub_region(rgn, srgn_idx, srgn) {
+ INIT_LIST_HEAD(&srgn->list_act_srgn);
+
+ srgn->rgn_idx = rgn->rgn_idx;
+ srgn->srgn_idx = srgn_idx;
+ srgn->srgn_state = HPB_SRGN_UNUSED;
+ }
+
+ if (unlikely(last && hpb->last_srgn_entries))
+ srgn->is_last = true;
+ }
+
+ static int ufshpb_alloc_subregion_tbl(struct ufshpb_lu *hpb,
+ struct ufshpb_region *rgn, int srgn_cnt)
+ {
+ rgn->srgn_tbl = kvcalloc(srgn_cnt, sizeof(struct ufshpb_subregion),
+ GFP_KERNEL);
+ if (!rgn->srgn_tbl)
+ return -ENOMEM;
+
+ rgn->srgn_cnt = srgn_cnt;
+ return 0;
+ }
+
+ static void ufshpb_lu_parameter_init(struct ufs_hba *hba,
+ struct ufshpb_lu *hpb,
+ struct ufshpb_dev_info *hpb_dev_info,
+ struct ufshpb_lu_info *hpb_lu_info)
+ {
+ u32 entries_per_rgn;
+ u64 rgn_mem_size, tmp;
+
+ if (ufshpb_is_legacy(hba))
+ hpb->pre_req_max_tr_len = HPB_LEGACY_CHUNK_HIGH;
+ else
+ hpb->pre_req_max_tr_len = hpb_dev_info->max_hpb_single_cmd;
+
+ hpb->lu_pinned_start = hpb_lu_info->pinned_start;
+ 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_SIZE;
+ do_div(rgn_mem_size, HPB_ENTRY_BLOCK_SIZE);
+ hpb->srgn_mem_size = (1ULL << hpb_dev_info->srgn_size)
+ * HPB_RGN_SIZE_UNIT / HPB_ENTRY_BLOCK_SIZE * HPB_ENTRY_SIZE;
+
+ tmp = rgn_mem_size;
+ do_div(tmp, HPB_ENTRY_SIZE);
+ entries_per_rgn = (u32)tmp;
+ hpb->entries_per_rgn_shift = ilog2(entries_per_rgn);
+ hpb->entries_per_rgn_mask = entries_per_rgn - 1;
+
+ hpb->entries_per_srgn = hpb->srgn_mem_size / HPB_ENTRY_SIZE;
+ hpb->entries_per_srgn_shift = ilog2(hpb->entries_per_srgn);
+ hpb->entries_per_srgn_mask = hpb->entries_per_srgn - 1;
+
+ tmp = rgn_mem_size;
+ do_div(tmp, hpb->srgn_mem_size);
+ hpb->srgns_per_rgn = (int)tmp;
+
+ hpb->rgns_per_lu = DIV_ROUND_UP(hpb_lu_info->num_blocks,
+ entries_per_rgn);
+ hpb->srgns_per_lu = DIV_ROUND_UP(hpb_lu_info->num_blocks,
+ (hpb->srgn_mem_size / HPB_ENTRY_SIZE));
+ hpb->last_srgn_entries = hpb_lu_info->num_blocks
+ % (hpb->srgn_mem_size / HPB_ENTRY_SIZE);
+
+ hpb->pages_per_srgn = DIV_ROUND_UP(hpb->srgn_mem_size, PAGE_SIZE);
+
+ if (hpb_dev_info->control_mode == HPB_HOST_CONTROL)
+ hpb->is_hcm = true;
+ }
+
+ static int ufshpb_alloc_region_tbl(struct ufs_hba *hba, struct ufshpb_lu *hpb)
+ {
+ struct ufshpb_region *rgn_table, *rgn;
+ int rgn_idx, i;
+ int ret = 0;
+
+ rgn_table = kvcalloc(hpb->rgns_per_lu, sizeof(struct ufshpb_region),
+ GFP_KERNEL);
+ if (!rgn_table)
+ return -ENOMEM;
+
+ for (rgn_idx = 0; rgn_idx < hpb->rgns_per_lu; rgn_idx++) {
+ int srgn_cnt = hpb->srgns_per_rgn;
+ bool last_srgn = false;
+
+ rgn = rgn_table + rgn_idx;
+ rgn->rgn_idx = rgn_idx;
+
+ spin_lock_init(&rgn->rgn_lock);
+
+ INIT_LIST_HEAD(&rgn->list_inact_rgn);
+ INIT_LIST_HEAD(&rgn->list_lru_rgn);
+ INIT_LIST_HEAD(&rgn->list_expired_rgn);
+
+ if (rgn_idx == hpb->rgns_per_lu - 1) {
+ srgn_cnt = ((hpb->srgns_per_lu - 1) %
+ hpb->srgns_per_rgn) + 1;
+ last_srgn = true;
+ }
+
+ ret = ufshpb_alloc_subregion_tbl(hpb, rgn, srgn_cnt);
+ if (ret)
+ goto release_srgn_table;
+ ufshpb_init_subregion_tbl(hpb, rgn, last_srgn);
+
+ 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;
+ }
+
+ rgn->rgn_flags = 0;
+ rgn->hpb = hpb;
+ }
+
+ hpb->rgn_tbl = rgn_table;
+
+ return 0;
+
+ release_srgn_table:
+ for (i = 0; i <= rgn_idx; i++)
+ kvfree(rgn_table[i].srgn_tbl);
+
+ kvfree(rgn_table);
+ return ret;
+ }
+
+ static void ufshpb_destroy_subregion_tbl(struct ufshpb_lu *hpb,
+ struct ufshpb_region *rgn)
+ {
+ int srgn_idx;
+ struct ufshpb_subregion *srgn;
+
+ for_each_sub_region(rgn, srgn_idx, srgn)
+ if (srgn->srgn_state != HPB_SRGN_UNUSED) {
+ srgn->srgn_state = HPB_SRGN_UNUSED;
+ ufshpb_put_map_ctx(hpb, srgn->mctx);
+ }
+ }
+
+ static void ufshpb_destroy_region_tbl(struct ufshpb_lu *hpb)
+ {
+ int rgn_idx;
+
+ for (rgn_idx = 0; rgn_idx < hpb->rgns_per_lu; rgn_idx++) {
+ struct ufshpb_region *rgn;
+
+ rgn = hpb->rgn_tbl + rgn_idx;
+ if (rgn->rgn_state != HPB_RGN_INACTIVE) {
+ rgn->rgn_state = HPB_RGN_INACTIVE;
+
+ ufshpb_destroy_subregion_tbl(hpb, rgn);
+ }
+
+ kvfree(rgn->srgn_tbl);
+ }
+
+ kvfree(hpb->rgn_tbl);
+ }
+
+ /* SYSFS functions */
+ #define ufshpb_sysfs_attr_show_func(__name) \
+ static ssize_t __name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+ { \
+ struct scsi_device *sdev = to_scsi_device(dev); \
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev); \
+ \
+ if (!hpb) \
+ return -ENODEV; \
+ \
+ return sysfs_emit(buf, "%llu\n", hpb->stats.__name); \
+ } \
+ \
+ static DEVICE_ATTR_RO(__name)
+
+ ufshpb_sysfs_attr_show_func(hit_cnt);
+ ufshpb_sysfs_attr_show_func(miss_cnt);
+ ufshpb_sysfs_attr_show_func(rcmd_noti_cnt);
+ ufshpb_sysfs_attr_show_func(rcmd_active_cnt);
+ ufshpb_sysfs_attr_show_func(rcmd_inactive_cnt);
+ ufshpb_sysfs_attr_show_func(map_req_cnt);
+ ufshpb_sysfs_attr_show_func(umap_req_cnt);
+
+ static struct attribute *hpb_dev_stat_attrs[] = {
+ &dev_attr_hit_cnt.attr,
+ &dev_attr_miss_cnt.attr,
+ &dev_attr_rcmd_noti_cnt.attr,
+ &dev_attr_rcmd_active_cnt.attr,
+ &dev_attr_rcmd_inactive_cnt.attr,
+ &dev_attr_map_req_cnt.attr,
+ &dev_attr_umap_req_cnt.attr,
+ NULL,
+ };
+
+ struct attribute_group ufs_sysfs_hpb_stat_group = {
+ .name = "hpb_stats",
+ .attrs = hpb_dev_stat_attrs,
+ };
+
+ /* SYSFS functions */
+ #define ufshpb_sysfs_param_show_func(__name) \
+ static ssize_t __name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+ { \
+ struct scsi_device *sdev = to_scsi_device(dev); \
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev); \
+ \
+ if (!hpb) \
+ return -ENODEV; \
+ \
+ return sysfs_emit(buf, "%d\n", hpb->params.__name); \
+ }
+
+ ufshpb_sysfs_param_show_func(requeue_timeout_ms);
+ static ssize_t
+ requeue_timeout_ms_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+ {
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+ int val;
+
+ if (!hpb)
+ return -ENODEV;
+
+ if (kstrtouint(buf, 0, &val))
+ return -EINVAL;
+
+ if (val < 0)
+ return -EINVAL;
+
+ hpb->params.requeue_timeout_ms = val;
+
+ return count;
+ }
+ static DEVICE_ATTR_RW(requeue_timeout_ms);
+
+ ufshpb_sysfs_param_show_func(activation_thld);
+ static ssize_t
+ activation_thld_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+ {
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+ int val;
+
+ if (!hpb)
+ return -ENODEV;
+
+ if (!hpb->is_hcm)
+ return -EOPNOTSUPP;
+
+ if (kstrtouint(buf, 0, &val))
+ return -EINVAL;
+
+ if (val <= 0)
+ return -EINVAL;
+
+ hpb->params.activation_thld = val;
+
+ return count;
+ }
+ static DEVICE_ATTR_RW(activation_thld);
+
+ ufshpb_sysfs_param_show_func(normalization_factor);
+ static ssize_t
+ normalization_factor_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+ {
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+ int val;
+
+ if (!hpb)
+ return -ENODEV;
+
+ if (!hpb->is_hcm)
+ return -EOPNOTSUPP;
+
+ if (kstrtouint(buf, 0, &val))
+ return -EINVAL;
+
+ if (val <= 0 || val > ilog2(hpb->entries_per_srgn))
+ return -EINVAL;
+
+ hpb->params.normalization_factor = val;
+
+ return count;
+ }
+ static DEVICE_ATTR_RW(normalization_factor);
+
+ ufshpb_sysfs_param_show_func(eviction_thld_enter);
+ static ssize_t
+ eviction_thld_enter_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+ {
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+ int val;
+
+ if (!hpb)
+ return -ENODEV;
+
+ if (!hpb->is_hcm)
+ return -EOPNOTSUPP;
+
+ if (kstrtouint(buf, 0, &val))
+ return -EINVAL;
+
+ if (val <= hpb->params.eviction_thld_exit)
+ return -EINVAL;
+
+ hpb->params.eviction_thld_enter = val;
+
+ return count;
+ }
+ static DEVICE_ATTR_RW(eviction_thld_enter);
+
+ ufshpb_sysfs_param_show_func(eviction_thld_exit);
+ static ssize_t
+ eviction_thld_exit_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+ {
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+ int val;
+
+ if (!hpb)
+ return -ENODEV;
+
+ if (!hpb->is_hcm)
+ return -EOPNOTSUPP;
+
+ if (kstrtouint(buf, 0, &val))
+ return -EINVAL;
+
+ if (val <= hpb->params.activation_thld)
+ return -EINVAL;
+
+ hpb->params.eviction_thld_exit = val;
+
+ return count;
+ }
+ static DEVICE_ATTR_RW(eviction_thld_exit);
+
+ ufshpb_sysfs_param_show_func(read_timeout_ms);
+ static ssize_t
+ read_timeout_ms_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+ {
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+ int val;
+
+ if (!hpb)
+ return -ENODEV;
+
+ if (!hpb->is_hcm)
+ return -EOPNOTSUPP;
+
+ if (kstrtouint(buf, 0, &val))
+ return -EINVAL;
+
+ /* read_timeout >> timeout_polling_interval */
+ if (val < hpb->params.timeout_polling_interval_ms * 2)
+ return -EINVAL;
+
+ hpb->params.read_timeout_ms = val;
+
+ return count;
+ }
+ static DEVICE_ATTR_RW(read_timeout_ms);
+
+ ufshpb_sysfs_param_show_func(read_timeout_expiries);
+ static ssize_t
+ read_timeout_expiries_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+ {
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+ int val;
+
+ if (!hpb)
+ return -ENODEV;
+
+ if (!hpb->is_hcm)
+ return -EOPNOTSUPP;
+
+ if (kstrtouint(buf, 0, &val))
+ return -EINVAL;
+
+ if (val <= 0)
+ return -EINVAL;
+
+ hpb->params.read_timeout_expiries = val;
+
+ return count;
+ }
+ static DEVICE_ATTR_RW(read_timeout_expiries);
+
+ ufshpb_sysfs_param_show_func(timeout_polling_interval_ms);
+ static ssize_t
+ timeout_polling_interval_ms_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+ {
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+ int val;
+
+ if (!hpb)
+ return -ENODEV;
+
+ if (!hpb->is_hcm)
+ return -EOPNOTSUPP;
+
+ if (kstrtouint(buf, 0, &val))
+ return -EINVAL;
+
+ /* timeout_polling_interval << read_timeout */
+ if (val <= 0 || val > hpb->params.read_timeout_ms / 2)
+ return -EINVAL;
+
+ hpb->params.timeout_polling_interval_ms = val;
+
+ return count;
+ }
+ static DEVICE_ATTR_RW(timeout_polling_interval_ms);
+
+ ufshpb_sysfs_param_show_func(inflight_map_req);
+ static ssize_t inflight_map_req_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+ {
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+ int val;
+
+ if (!hpb)
+ return -ENODEV;
+
+ if (!hpb->is_hcm)
+ return -EOPNOTSUPP;
+
+ if (kstrtouint(buf, 0, &val))
+ return -EINVAL;
+
+ if (val <= 0 || val > hpb->sdev_ufs_lu->queue_depth - 1)
+ return -EINVAL;
+
+ hpb->params.inflight_map_req = val;
+
+ return count;
+ }
+ static DEVICE_ATTR_RW(inflight_map_req);
+
+ static void ufshpb_hcm_param_init(struct ufshpb_lu *hpb)
+ {
+ hpb->params.activation_thld = ACTIVATION_THRESHOLD;
+ hpb->params.normalization_factor = 1;
+ hpb->params.eviction_thld_enter = (ACTIVATION_THRESHOLD << 5);
+ hpb->params.eviction_thld_exit = (ACTIVATION_THRESHOLD << 4);
+ hpb->params.read_timeout_ms = READ_TO_MS;
+ hpb->params.read_timeout_expiries = READ_TO_EXPIRIES;
+ hpb->params.timeout_polling_interval_ms = POLLING_INTERVAL_MS;
+ hpb->params.inflight_map_req = THROTTLE_MAP_REQ_DEFAULT;
+ }
+
+ static struct attribute *hpb_dev_param_attrs[] = {
+ &dev_attr_requeue_timeout_ms.attr,
+ &dev_attr_activation_thld.attr,
+ &dev_attr_normalization_factor.attr,
+ &dev_attr_eviction_thld_enter.attr,
+ &dev_attr_eviction_thld_exit.attr,
+ &dev_attr_read_timeout_ms.attr,
+ &dev_attr_read_timeout_expiries.attr,
+ &dev_attr_timeout_polling_interval_ms.attr,
+ &dev_attr_inflight_map_req.attr,
+ NULL,
+ };
+
+ struct attribute_group ufs_sysfs_hpb_param_group = {
+ .name = "hpb_params",
+ .attrs = hpb_dev_param_attrs,
+ };
+
+ static int ufshpb_pre_req_mempool_init(struct ufshpb_lu *hpb)
+ {
+ struct ufshpb_req *pre_req = NULL, *t;
+ int qd = hpb->sdev_ufs_lu->queue_depth / 2;
+ int i;
+
+ INIT_LIST_HEAD(&hpb->lh_pre_req_free);
+
+ hpb->pre_req = kcalloc(qd, sizeof(struct ufshpb_req), GFP_KERNEL);
+ hpb->throttle_pre_req = qd;
+ hpb->num_inflight_pre_req = 0;
+
+ if (!hpb->pre_req)
+ goto release_mem;
+
+ for (i = 0; i < qd; i++) {
+ pre_req = hpb->pre_req + i;
+ INIT_LIST_HEAD(&pre_req->list_req);
+ pre_req->req = NULL;
+
+ pre_req->bio = bio_alloc(NULL, 1, 0, GFP_KERNEL);
+ if (!pre_req->bio)
+ goto release_mem;
+
+ pre_req->wb.m_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ if (!pre_req->wb.m_page) {
+ bio_put(pre_req->bio);
+ goto release_mem;
+ }
+
+ list_add_tail(&pre_req->list_req, &hpb->lh_pre_req_free);
+ }
+
+ return 0;
+ release_mem:
+ list_for_each_entry_safe(pre_req, t, &hpb->lh_pre_req_free, list_req) {
+ list_del_init(&pre_req->list_req);
+ bio_put(pre_req->bio);
+ __free_page(pre_req->wb.m_page);
+ }
+
+ kfree(hpb->pre_req);
+ return -ENOMEM;
+ }
+
+ static void ufshpb_pre_req_mempool_destroy(struct ufshpb_lu *hpb)
+ {
+ struct ufshpb_req *pre_req = NULL;
+ int i;
+
+ for (i = 0; i < hpb->throttle_pre_req; i++) {
+ pre_req = hpb->pre_req + i;
+ bio_put(hpb->pre_req[i].bio);
+ if (!pre_req->wb.m_page)
+ __free_page(hpb->pre_req[i].wb.m_page);
+ list_del_init(&pre_req->list_req);
+ }
+
+ kfree(hpb->pre_req);
+ }
+
+ static void ufshpb_stat_init(struct ufshpb_lu *hpb)
+ {
+ hpb->stats.hit_cnt = 0;
+ hpb->stats.miss_cnt = 0;
+ hpb->stats.rcmd_noti_cnt = 0;
+ hpb->stats.rcmd_active_cnt = 0;
+ hpb->stats.rcmd_inactive_cnt = 0;
+ hpb->stats.map_req_cnt = 0;
+ hpb->stats.umap_req_cnt = 0;
+ }
+
+ static void ufshpb_param_init(struct ufshpb_lu *hpb)
+ {
+ hpb->params.requeue_timeout_ms = HPB_REQUEUE_TIME_MS;
+ if (hpb->is_hcm)
+ ufshpb_hcm_param_init(hpb);
+ }
+
+ static int ufshpb_lu_hpb_init(struct ufs_hba *hba, struct ufshpb_lu *hpb)
+ {
+ int ret;
+
+ spin_lock_init(&hpb->rgn_state_lock);
+ spin_lock_init(&hpb->rsp_list_lock);
+ spin_lock_init(&hpb->param_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);
+ if (hpb->is_hcm) {
+ INIT_WORK(&hpb->ufshpb_normalization_work,
+ ufshpb_normalization_work_handler);
+ INIT_DELAYED_WORK(&hpb->ufshpb_read_to_work,
+ ufshpb_read_to_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_pre_req_mempool_init(hpb);
+ if (ret) {
+ dev_err(hba->dev, "ufshpb(%d) pre_req_mempool init fail",
+ hpb->lun);
+ goto release_m_page_cache;
+ }
+
+ ret = ufshpb_alloc_region_tbl(hba, hpb);
+ if (ret)
+ goto release_pre_req_mempool;
+
+ ufshpb_stat_init(hpb);
+ ufshpb_param_init(hpb);
+
+ if (hpb->is_hcm) {
+ unsigned int poll;
+
+ poll = hpb->params.timeout_polling_interval_ms;
+ schedule_delayed_work(&hpb->ufshpb_read_to_work,
+ msecs_to_jiffies(poll));
+ }
+
+ return 0;
+
+ release_pre_req_mempool:
+ ufshpb_pre_req_mempool_destroy(hpb);
+ release_m_page_cache:
+ kmem_cache_destroy(hpb->m_page_cache);
+ release_req_cache:
+ kmem_cache_destroy(hpb->map_req_cache);
+ return ret;
+ }
+
+ static struct ufshpb_lu *
+ ufshpb_alloc_hpb_lu(struct ufs_hba *hba, struct scsi_device *sdev,
+ struct ufshpb_dev_info *hpb_dev_info,
+ struct ufshpb_lu_info *hpb_lu_info)
+ {
+ struct ufshpb_lu *hpb;
+ int ret;
+
+ hpb = kzalloc(sizeof(struct ufshpb_lu), GFP_KERNEL);
+ if (!hpb)
+ return NULL;
+
+ hpb->lun = sdev->lun;
+ hpb->sdev_ufs_lu = sdev;
+
+ ufshpb_lu_parameter_init(hba, hpb, hpb_dev_info, hpb_lu_info);
+
+ ret = ufshpb_lu_hpb_init(hba, hpb);
+ if (ret) {
+ dev_err(hba->dev, "hpb lu init failed. ret %d", ret);
+ goto release_hpb;
+ }
+
+ sdev->hostdata = hpb;
+ return hpb;
+
+ release_hpb:
+ kfree(hpb);
+ 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 remaining HPB region information
+ * may be stale. Therefore, by discarding the lists of HPB response
+ * that remained after reset, we prevent 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 void ufshpb_cancel_jobs(struct ufshpb_lu *hpb)
+ {
+ if (hpb->is_hcm) {
+ cancel_delayed_work_sync(&hpb->ufshpb_read_to_work);
+ cancel_work_sync(&hpb->ufshpb_normalization_work);
+ }
+ cancel_work_sync(&hpb->map_work);
+ }
+
+ static bool ufshpb_check_hpb_reset_query(struct ufs_hba *hba)
+ {
+ int err = 0;
+ bool flag_res = true;
+ int try;
+
+ /* wait for the device to complete HPB reset query */
+ for (try = 0; try < HPB_RESET_REQ_RETRIES; try++) {
+ dev_dbg(hba->dev,
+ "%s start flag reset polling %d times\n",
+ __func__, try);
+
+ /* Poll fHpbReset flag to be cleared */
+ err = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_READ_FLAG,
+ QUERY_FLAG_IDN_HPB_RESET, 0, &flag_res);
+
+ if (err) {
+ dev_err(hba->dev,
+ "%s reading fHpbReset flag failed with error %d\n",
+ __func__, err);
+ return flag_res;
+ }
+
+ if (!flag_res)
+ goto out;
+
+ usleep_range(1000, 1100);
+ }
+ if (flag_res) {
+ dev_err(hba->dev,
+ "%s fHpbReset was not cleared by the device\n",
+ __func__);
+ }
+ out:
+ return flag_res;
+ }
+
+ /**
+ * ufshpb_toggle_state - switch HPB state of all LUs
+ * @hba: per-adapter instance
+ * @src: expected current HPB state
+ * @dest: target HPB state to switch to
+ */
+ void ufshpb_toggle_state(struct ufs_hba *hba, enum UFSHPB_STATE src, enum UFSHPB_STATE dest)
+ {
+ struct ufshpb_lu *hpb;
+ struct scsi_device *sdev;
+
+ shost_for_each_device(sdev, hba->host) {
+ hpb = ufshpb_get_hpb_data(sdev);
+
+ if (!hpb || ufshpb_get_state(hpb) != src)
+ continue;
+ ufshpb_set_state(hpb, dest);
+
+ if (dest == HPB_RESET) {
+ ufshpb_cancel_jobs(hpb);
+ ufshpb_discard_rsp_lists(hpb);
+ }
+ }
+ }
+
+ void ufshpb_suspend(struct ufs_hba *hba)
+ {
+ struct ufshpb_lu *hpb;
+ struct scsi_device *sdev;
+
+ shost_for_each_device(sdev, hba->host) {
+ hpb = ufshpb_get_hpb_data(sdev);
+ if (!hpb || ufshpb_get_state(hpb) != HPB_PRESENT)
+ continue;
+
+ ufshpb_set_state(hpb, HPB_SUSPEND);
+ ufshpb_cancel_jobs(hpb);
+ }
+ }
+
+ void ufshpb_resume(struct ufs_hba *hba)
+ {
+ struct ufshpb_lu *hpb;
+ struct scsi_device *sdev;
+
+ shost_for_each_device(sdev, hba->host) {
+ hpb = ufshpb_get_hpb_data(sdev);
+ if (!hpb || ufshpb_get_state(hpb) != HPB_SUSPEND)
+ continue;
+
+ ufshpb_set_state(hpb, HPB_PRESENT);
+ ufshpb_kick_map_work(hpb);
+ if (hpb->is_hcm) {
+ unsigned int poll = hpb->params.timeout_polling_interval_ms;
+
+ schedule_delayed_work(&hpb->ufshpb_read_to_work, msecs_to_jiffies(poll));
+ }
+ }
+ }
+
+ static int ufshpb_get_lu_info(struct ufs_hba *hba, int lun,
+ struct ufshpb_lu_info *hpb_lu_info)
+ {
+ u16 max_active_rgns;
+ u8 lu_enable;
+ int size;
+ int ret;
+ char desc_buf[QUERY_DESC_MAX_SIZE];
+
+ ufshcd_map_desc_id_to_length(hba, QUERY_DESC_IDN_UNIT, &size);
+
+ ufshcd_rpm_get_sync(hba);
+ ret = ufshcd_query_descriptor_retry(hba, UPIU_QUERY_OPCODE_READ_DESC,
+ QUERY_DESC_IDN_UNIT, lun, 0,
+ desc_buf, &size);
+ ufshcd_rpm_put_sync(hba);
+
+ if (ret) {
+ dev_err(hba->dev,
+ "%s: idn: %d lun: %d query request failed",
+ __func__, QUERY_DESC_IDN_UNIT, lun);
+ return ret;
+ }
+
+ lu_enable = desc_buf[UNIT_DESC_PARAM_LU_ENABLE];
+ if (lu_enable != LU_ENABLED_HPB_FUNC)
+ return -ENODEV;
+
+ max_active_rgns = get_unaligned_be16(
+ desc_buf + UNIT_DESC_PARAM_HPB_LU_MAX_ACTIVE_RGNS);
+ if (!max_active_rgns) {
+ dev_err(hba->dev,
+ "lun %d wrong number of max active regions\n", lun);
+ return -ENODEV;
+ }
+
+ hpb_lu_info->num_blocks = get_unaligned_be64(
+ desc_buf + UNIT_DESC_PARAM_LOGICAL_BLK_COUNT);
+ hpb_lu_info->pinned_start = get_unaligned_be16(
+ desc_buf + UNIT_DESC_PARAM_HPB_PIN_RGN_START_OFF);
+ hpb_lu_info->num_pinned = get_unaligned_be16(
+ desc_buf + UNIT_DESC_PARAM_HPB_NUM_PIN_RGNS);
+ hpb_lu_info->max_active_rgns = max_active_rgns;
+
+ return 0;
+ }
+
+ void ufshpb_destroy_lu(struct ufs_hba *hba, struct scsi_device *sdev)
+ {
+ struct ufshpb_lu *hpb = ufshpb_get_hpb_data(sdev);
+
+ if (!hpb)
+ return;
+
+ ufshpb_set_state(hpb, HPB_FAILED);
+
+ sdev = hpb->sdev_ufs_lu;
+ sdev->hostdata = NULL;
+
+ ufshpb_cancel_jobs(hpb);
+
+ ufshpb_pre_req_mempool_destroy(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);
+
+ kfree(hpb);
+ }
+
+ static void ufshpb_hpb_lu_prepared(struct ufs_hba *hba)
+ {
+ int pool_size;
+ struct ufshpb_lu *hpb;
+ struct scsi_device *sdev;
+ bool init_success;
+
+ if (tot_active_srgn_pages == 0) {
+ ufshpb_remove(hba);
+ return;
+ }
+
+ init_success = !ufshpb_check_hpb_reset_query(hba);
+
+ pool_size = PAGE_ALIGN(ufshpb_host_map_kbytes * 1024) / PAGE_SIZE;
+ if (pool_size > tot_active_srgn_pages) {
+ mempool_resize(ufshpb_mctx_pool, tot_active_srgn_pages);
+ mempool_resize(ufshpb_page_pool, tot_active_srgn_pages);
+ }
+
+ shost_for_each_device(sdev, hba->host) {
+ hpb = ufshpb_get_hpb_data(sdev);
+ if (!hpb)
+ continue;
+
+ if (init_success) {
+ ufshpb_set_state(hpb, HPB_PRESENT);
+ if ((hpb->lu_pinned_end - hpb->lu_pinned_start) > 0)
+ queue_work(ufshpb_wq, &hpb->map_work);
+ } else {
+ dev_err(hba->dev, "destroy HPB lu %d\n", hpb->lun);
+ ufshpb_destroy_lu(hba, sdev);
+ }
+ }
+
+ if (!init_success)
+ ufshpb_remove(hba);
+ }
+
+ void ufshpb_init_hpb_lu(struct ufs_hba *hba, struct scsi_device *sdev)
+ {
+ struct ufshpb_lu *hpb;
+ int ret;
+ struct ufshpb_lu_info hpb_lu_info = { 0 };
+ int lun = sdev->lun;
+
+ if (lun >= hba->dev_info.max_lu_supported)
+ goto out;
+
+ ret = ufshpb_get_lu_info(hba, lun, &hpb_lu_info);
+ if (ret)
+ goto out;
+
+ hpb = ufshpb_alloc_hpb_lu(hba, sdev, &hba->ufshpb_dev,
+ &hpb_lu_info);
+ if (!hpb)
+ goto out;
+
+ tot_active_srgn_pages += hpb_lu_info.max_active_rgns *
+ hpb->srgns_per_rgn * hpb->pages_per_srgn;
+
+ out:
+ /* All LUs are initialized */
+ if (atomic_dec_and_test(&hba->ufshpb_dev.slave_conf_cnt))
+ ufshpb_hpb_lu_prepared(hba);
+ }
+
+ static int ufshpb_init_mem_wq(struct ufs_hba *hba)
+ {
+ int ret;
+ unsigned int pool_size;
+
+ ufshpb_mctx_cache = kmem_cache_create("ufshpb_mctx_cache",
+ sizeof(struct ufshpb_map_ctx),
+ 0, 0, NULL);
+ if (!ufshpb_mctx_cache) {
+ dev_err(hba->dev, "ufshpb: cannot init mctx cache\n");
+ return -ENOMEM;
+ }
+
+ pool_size = PAGE_ALIGN(ufshpb_host_map_kbytes * 1024) / PAGE_SIZE;
+ dev_info(hba->dev, "%s:%d ufshpb_host_map_kbytes %u pool_size %u\n",
+ __func__, __LINE__, ufshpb_host_map_kbytes, pool_size);
+
+ ufshpb_mctx_pool = mempool_create_slab_pool(pool_size,
+ ufshpb_mctx_cache);
+ if (!ufshpb_mctx_pool) {
+ dev_err(hba->dev, "ufshpb: cannot init mctx pool\n");
+ ret = -ENOMEM;
+ goto release_mctx_cache;
+ }
+
+ ufshpb_page_pool = mempool_create_page_pool(pool_size, 0);
+ if (!ufshpb_page_pool) {
+ dev_err(hba->dev, "ufshpb: cannot init page pool\n");
+ ret = -ENOMEM;
+ goto release_mctx_pool;
+ }
+
+ ufshpb_wq = alloc_workqueue("ufshpb-wq",
+ WQ_UNBOUND | WQ_MEM_RECLAIM, 0);
+ if (!ufshpb_wq) {
+ dev_err(hba->dev, "ufshpb: alloc workqueue failed\n");
+ ret = -ENOMEM;
+ goto release_page_pool;
+ }
+
+ return 0;
+
+ release_page_pool:
+ mempool_destroy(ufshpb_page_pool);
+ release_mctx_pool:
+ mempool_destroy(ufshpb_mctx_pool);
+ release_mctx_cache:
+ kmem_cache_destroy(ufshpb_mctx_cache);
+ return ret;
+ }
+
+ void ufshpb_get_geo_info(struct ufs_hba *hba, u8 *geo_buf)
+ {
+ struct ufshpb_dev_info *hpb_info = &hba->ufshpb_dev;
+ int max_active_rgns = 0;
+ int hpb_num_lu;
+
+ hpb_num_lu = geo_buf[GEOMETRY_DESC_PARAM_HPB_NUMBER_LU];
+ if (hpb_num_lu == 0) {
+ dev_err(hba->dev, "No HPB LU supported\n");
+ hpb_info->hpb_disabled = true;
+ return;
+ }
+
+ hpb_info->rgn_size = geo_buf[GEOMETRY_DESC_PARAM_HPB_REGION_SIZE];
+ hpb_info->srgn_size = geo_buf[GEOMETRY_DESC_PARAM_HPB_SUBREGION_SIZE];
+ max_active_rgns = get_unaligned_be16(geo_buf +
+ GEOMETRY_DESC_PARAM_HPB_MAX_ACTIVE_REGS);
+
+ if (hpb_info->rgn_size == 0 || hpb_info->srgn_size == 0 ||
+ max_active_rgns == 0) {
+ dev_err(hba->dev, "No HPB supported device\n");
+ hpb_info->hpb_disabled = true;
+ return;
+ }
+ }
+
+ void ufshpb_get_dev_info(struct ufs_hba *hba, u8 *desc_buf)
+ {
+ struct ufshpb_dev_info *hpb_dev_info = &hba->ufshpb_dev;
+ int version, ret;
+ int max_single_cmd;
+
+ hpb_dev_info->control_mode = desc_buf[DEVICE_DESC_PARAM_HPB_CONTROL];
+
+ version = get_unaligned_be16(desc_buf + DEVICE_DESC_PARAM_HPB_VER);
+ if ((version != HPB_SUPPORT_VERSION) &&
+ (version != HPB_SUPPORT_LEGACY_VERSION)) {
+ dev_err(hba->dev, "%s: HPB %x version is not supported.\n",
+ __func__, version);
+ hpb_dev_info->hpb_disabled = true;
+ return;
+ }
+
+ if (version == HPB_SUPPORT_LEGACY_VERSION)
+ hpb_dev_info->is_legacy = true;
+
+ /*
+ * Get the number of user logical unit to check whether all
+ * scsi_device finish initialization
+ */
+ hpb_dev_info->num_lu = desc_buf[DEVICE_DESC_PARAM_NUM_LU];
+
+ if (hpb_dev_info->is_legacy)
+ return;
+
+ ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
+ QUERY_ATTR_IDN_MAX_HPB_SINGLE_CMD, 0, 0, &max_single_cmd);
+
+ if (ret)
+ hpb_dev_info->max_hpb_single_cmd = HPB_LEGACY_CHUNK_HIGH;
+ else
+ hpb_dev_info->max_hpb_single_cmd = min(max_single_cmd + 1, HPB_MULTI_CHUNK_HIGH);
+ }
+
+ void ufshpb_init(struct ufs_hba *hba)
+ {
+ struct ufshpb_dev_info *hpb_dev_info = &hba->ufshpb_dev;
+ int try;
+ int ret;
+
+ if (!ufshpb_is_allowed(hba) || !hba->dev_info.hpb_enabled)
+ return;
+
+ if (ufshpb_init_mem_wq(hba)) {
+ hpb_dev_info->hpb_disabled = true;
+ return;
+ }
+
+ atomic_set(&hpb_dev_info->slave_conf_cnt, hpb_dev_info->num_lu);
+ tot_active_srgn_pages = 0;
+ /* issue HPB reset query */
+ for (try = 0; try < HPB_RESET_REQ_RETRIES; try++) {
+ ret = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_SET_FLAG,
+ QUERY_FLAG_IDN_HPB_RESET, 0, NULL);
+ if (!ret)
+ break;
+ }
+ }
+
+ void ufshpb_remove(struct ufs_hba *hba)
+ {
+ mempool_destroy(ufshpb_page_pool);
+ mempool_destroy(ufshpb_mctx_pool);
+ kmem_cache_destroy(ufshpb_mctx_cache);
+
+ destroy_workqueue(ufshpb_wq);
+ }
+
+ 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");
projects / linux-block.git / commitdiff