250 lines
6.3 KiB
C
250 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020 Western Digital Corporation or its affiliates.
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*/
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#include <linux/blkdev.h>
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#include <linux/vmalloc.h>
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#include "nvme.h"
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int nvme_revalidate_zones(struct nvme_ns *ns)
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{
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struct request_queue *q = ns->queue;
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blk_queue_chunk_sectors(q, ns->zsze);
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blk_queue_max_zone_append_sectors(q, ns->ctrl->max_zone_append);
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return blk_revalidate_disk_zones(ns->disk, NULL);
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}
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static int nvme_set_max_append(struct nvme_ctrl *ctrl)
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{
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struct nvme_command c = { };
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struct nvme_id_ctrl_zns *id;
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int status;
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id = kzalloc(sizeof(*id), GFP_KERNEL);
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if (!id)
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return -ENOMEM;
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c.identify.opcode = nvme_admin_identify;
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c.identify.cns = NVME_ID_CNS_CS_CTRL;
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c.identify.csi = NVME_CSI_ZNS;
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status = nvme_submit_sync_cmd(ctrl->admin_q, &c, id, sizeof(*id));
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if (status) {
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kfree(id);
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return status;
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}
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if (id->zasl)
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ctrl->max_zone_append = 1 << (id->zasl + 3);
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else
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ctrl->max_zone_append = ctrl->max_hw_sectors;
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kfree(id);
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return 0;
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}
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int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
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{
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struct nvme_effects_log *log = ns->head->effects;
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struct request_queue *q = ns->queue;
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struct nvme_command c = { };
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struct nvme_id_ns_zns *id;
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int status;
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/* Driver requires zone append support */
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if ((le32_to_cpu(log->iocs[nvme_cmd_zone_append]) &
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NVME_CMD_EFFECTS_CSUPP)) {
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if (test_and_clear_bit(NVME_NS_FORCE_RO, &ns->flags))
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dev_warn(ns->ctrl->device,
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"Zone Append supported for zoned namespace:%d. Remove read-only mode\n",
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ns->head->ns_id);
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} else {
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set_bit(NVME_NS_FORCE_RO, &ns->flags);
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dev_warn(ns->ctrl->device,
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"Zone Append not supported for zoned namespace:%d. Forcing to read-only mode\n",
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ns->head->ns_id);
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}
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/* Lazily query controller append limit for the first zoned namespace */
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if (!ns->ctrl->max_zone_append) {
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status = nvme_set_max_append(ns->ctrl);
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if (status)
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return status;
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}
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id = kzalloc(sizeof(*id), GFP_KERNEL);
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if (!id)
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return -ENOMEM;
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c.identify.opcode = nvme_admin_identify;
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c.identify.nsid = cpu_to_le32(ns->head->ns_id);
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c.identify.cns = NVME_ID_CNS_CS_NS;
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c.identify.csi = NVME_CSI_ZNS;
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status = nvme_submit_sync_cmd(ns->ctrl->admin_q, &c, id, sizeof(*id));
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if (status)
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goto free_data;
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/*
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* We currently do not handle devices requiring any of the zoned
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* operation characteristics.
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*/
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if (id->zoc) {
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dev_warn(ns->ctrl->device,
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"zone operations:%x not supported for namespace:%u\n",
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le16_to_cpu(id->zoc), ns->head->ns_id);
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status = -ENODEV;
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goto free_data;
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}
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ns->zsze = nvme_lba_to_sect(ns, le64_to_cpu(id->lbafe[lbaf].zsze));
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if (!is_power_of_2(ns->zsze)) {
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dev_warn(ns->ctrl->device,
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"invalid zone size:%llu for namespace:%u\n",
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ns->zsze, ns->head->ns_id);
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status = -ENODEV;
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goto free_data;
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}
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disk_set_zoned(ns->disk, BLK_ZONED_HM);
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blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q);
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disk_set_max_open_zones(ns->disk, le32_to_cpu(id->mor) + 1);
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disk_set_max_active_zones(ns->disk, le32_to_cpu(id->mar) + 1);
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free_data:
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kfree(id);
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return status;
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}
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static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns,
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unsigned int nr_zones, size_t *buflen)
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{
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struct request_queue *q = ns->disk->queue;
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size_t bufsize;
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void *buf;
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const size_t min_bufsize = sizeof(struct nvme_zone_report) +
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sizeof(struct nvme_zone_descriptor);
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nr_zones = min_t(unsigned int, nr_zones,
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get_capacity(ns->disk) >> ilog2(ns->zsze));
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bufsize = sizeof(struct nvme_zone_report) +
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nr_zones * sizeof(struct nvme_zone_descriptor);
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bufsize = min_t(size_t, bufsize,
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queue_max_hw_sectors(q) << SECTOR_SHIFT);
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bufsize = min_t(size_t, bufsize, queue_max_segments(q) << PAGE_SHIFT);
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while (bufsize >= min_bufsize) {
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buf = __vmalloc(bufsize, GFP_KERNEL | __GFP_NORETRY);
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if (buf) {
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*buflen = bufsize;
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return buf;
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}
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bufsize >>= 1;
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}
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return NULL;
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}
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static int nvme_zone_parse_entry(struct nvme_ns *ns,
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struct nvme_zone_descriptor *entry,
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unsigned int idx, report_zones_cb cb,
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void *data)
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{
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struct blk_zone zone = { };
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if ((entry->zt & 0xf) != NVME_ZONE_TYPE_SEQWRITE_REQ) {
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dev_err(ns->ctrl->device, "invalid zone type %#x\n",
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entry->zt);
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return -EINVAL;
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}
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zone.type = BLK_ZONE_TYPE_SEQWRITE_REQ;
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zone.cond = entry->zs >> 4;
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zone.len = ns->zsze;
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zone.capacity = nvme_lba_to_sect(ns, le64_to_cpu(entry->zcap));
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zone.start = nvme_lba_to_sect(ns, le64_to_cpu(entry->zslba));
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if (zone.cond == BLK_ZONE_COND_FULL)
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zone.wp = zone.start + zone.len;
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else
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zone.wp = nvme_lba_to_sect(ns, le64_to_cpu(entry->wp));
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return cb(&zone, idx, data);
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}
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int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
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unsigned int nr_zones, report_zones_cb cb, void *data)
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{
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struct nvme_zone_report *report;
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struct nvme_command c = { };
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int ret, zone_idx = 0;
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unsigned int nz, i;
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size_t buflen;
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if (ns->head->ids.csi != NVME_CSI_ZNS)
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return -EINVAL;
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report = nvme_zns_alloc_report_buffer(ns, nr_zones, &buflen);
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if (!report)
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return -ENOMEM;
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c.zmr.opcode = nvme_cmd_zone_mgmt_recv;
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c.zmr.nsid = cpu_to_le32(ns->head->ns_id);
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c.zmr.numd = cpu_to_le32(nvme_bytes_to_numd(buflen));
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c.zmr.zra = NVME_ZRA_ZONE_REPORT;
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c.zmr.zrasf = NVME_ZRASF_ZONE_REPORT_ALL;
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c.zmr.pr = NVME_REPORT_ZONE_PARTIAL;
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sector &= ~(ns->zsze - 1);
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while (zone_idx < nr_zones && sector < get_capacity(ns->disk)) {
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memset(report, 0, buflen);
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c.zmr.slba = cpu_to_le64(nvme_sect_to_lba(ns, sector));
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ret = nvme_submit_sync_cmd(ns->queue, &c, report, buflen);
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if (ret) {
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if (ret > 0)
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ret = -EIO;
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goto out_free;
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}
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nz = min((unsigned int)le64_to_cpu(report->nr_zones), nr_zones);
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if (!nz)
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break;
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for (i = 0; i < nz && zone_idx < nr_zones; i++) {
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ret = nvme_zone_parse_entry(ns, &report->entries[i],
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zone_idx, cb, data);
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if (ret)
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goto out_free;
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zone_idx++;
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}
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sector += ns->zsze * nz;
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}
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if (zone_idx > 0)
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ret = zone_idx;
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else
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ret = -EINVAL;
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out_free:
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kvfree(report);
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return ret;
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}
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blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
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struct nvme_command *c, enum nvme_zone_mgmt_action action)
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{
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memset(c, 0, sizeof(*c));
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c->zms.opcode = nvme_cmd_zone_mgmt_send;
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c->zms.nsid = cpu_to_le32(ns->head->ns_id);
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c->zms.slba = cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req)));
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c->zms.zsa = action;
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if (req_op(req) == REQ_OP_ZONE_RESET_ALL)
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c->zms.select_all = 1;
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return BLK_STS_OK;
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}
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