1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (C) 2020 Western Digital Corporation or its affiliates. 4 */ 5 6#include <linux/blkdev.h> 7#include <linux/vmalloc.h> 8#include "nvme.h" 9 10int nvme_revalidate_zones(struct nvme_ns *ns) 11{ 12 struct request_queue *q = ns->queue; 13 int ret; 14 15 ret = blk_revalidate_disk_zones(ns->disk, NULL); 16 if (!ret) 17 blk_queue_max_zone_append_sectors(q, ns->ctrl->max_zone_append); 18 return ret; 19} 20 21static int nvme_set_max_append(struct nvme_ctrl *ctrl) 22{ 23 struct nvme_command c = { }; 24 struct nvme_id_ctrl_zns *id; 25 int status; 26 27 id = kzalloc(sizeof(*id), GFP_KERNEL); 28 if (!id) 29 return -ENOMEM; 30 31 c.identify.opcode = nvme_admin_identify; 32 c.identify.cns = NVME_ID_CNS_CS_CTRL; 33 c.identify.csi = NVME_CSI_ZNS; 34 35 status = nvme_submit_sync_cmd(ctrl->admin_q, &c, id, sizeof(*id)); 36 if (status) { 37 kfree(id); 38 return status; 39 } 40 41 if (id->zasl) 42 ctrl->max_zone_append = 1 << (id->zasl + 3); 43 else 44 ctrl->max_zone_append = ctrl->max_hw_sectors; 45 kfree(id); 46 return 0; 47} 48 49int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf) 50{ 51 struct nvme_effects_log *log = ns->head->effects; 52 struct request_queue *q = ns->queue; 53 struct nvme_command c = { }; 54 struct nvme_id_ns_zns *id; 55 int status; 56 57 /* Driver requires zone append support */ 58 if (!(le32_to_cpu(log->iocs[nvme_cmd_zone_append]) & 59 NVME_CMD_EFFECTS_CSUPP)) { 60 dev_warn(ns->ctrl->device, 61 "append not supported for zoned namespace:%d\n", 62 ns->head->ns_id); 63 return -EINVAL; 64 } 65 66 /* Lazily query controller append limit for the first zoned namespace */ 67 if (!ns->ctrl->max_zone_append) { 68 status = nvme_set_max_append(ns->ctrl); 69 if (status) 70 return status; 71 } 72 73 id = kzalloc(sizeof(*id), GFP_KERNEL); 74 if (!id) 75 return -ENOMEM; 76 77 c.identify.opcode = nvme_admin_identify; 78 c.identify.nsid = cpu_to_le32(ns->head->ns_id); 79 c.identify.cns = NVME_ID_CNS_CS_NS; 80 c.identify.csi = NVME_CSI_ZNS; 81 82 status = nvme_submit_sync_cmd(ns->ctrl->admin_q, &c, id, sizeof(*id)); 83 if (status) 84 goto free_data; 85 86 /* 87 * We currently do not handle devices requiring any of the zoned 88 * operation characteristics. 89 */ 90 if (id->zoc) { 91 dev_warn(ns->ctrl->device, 92 "zone operations:%x not supported for namespace:%u\n", 93 le16_to_cpu(id->zoc), ns->head->ns_id); 94 status = -EINVAL; 95 goto free_data; 96 } 97 98 ns->zsze = nvme_lba_to_sect(ns, le64_to_cpu(id->lbafe[lbaf].zsze)); 99 if (!is_power_of_2(ns->zsze)) { 100 dev_warn(ns->ctrl->device, 101 "invalid zone size:%llu for namespace:%u\n", 102 ns->zsze, ns->head->ns_id); 103 status = -EINVAL; 104 goto free_data; 105 } 106 107 q->limits.zoned = BLK_ZONED_HM; 108 blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q); 109 blk_queue_max_open_zones(q, le32_to_cpu(id->mor) + 1); 110 blk_queue_max_active_zones(q, le32_to_cpu(id->mar) + 1); 111free_data: 112 kfree(id); 113 return status; 114} 115 116static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns, 117 unsigned int nr_zones, size_t *buflen) 118{ 119 struct request_queue *q = ns->disk->queue; 120 size_t bufsize; 121 void *buf; 122 123 const size_t min_bufsize = sizeof(struct nvme_zone_report) + 124 sizeof(struct nvme_zone_descriptor); 125 126 nr_zones = min_t(unsigned int, nr_zones, 127 get_capacity(ns->disk) >> ilog2(ns->zsze)); 128 129 bufsize = sizeof(struct nvme_zone_report) + 130 nr_zones * sizeof(struct nvme_zone_descriptor); 131 bufsize = min_t(size_t, bufsize, 132 queue_max_hw_sectors(q) << SECTOR_SHIFT); 133 bufsize = min_t(size_t, bufsize, queue_max_segments(q) << PAGE_SHIFT); 134 135 while (bufsize >= min_bufsize) { 136 buf = __vmalloc(bufsize, GFP_KERNEL | __GFP_NORETRY); 137 if (buf) { 138 *buflen = bufsize; 139 return buf; 140 } 141 bufsize >>= 1; 142 } 143 return NULL; 144} 145 146static int nvme_zone_parse_entry(struct nvme_ns *ns, 147 struct nvme_zone_descriptor *entry, 148 unsigned int idx, report_zones_cb cb, 149 void *data) 150{ 151 struct blk_zone zone = { }; 152 153 if ((entry->zt & 0xf) != NVME_ZONE_TYPE_SEQWRITE_REQ) { 154 dev_err(ns->ctrl->device, "invalid zone type %#x\n", 155 entry->zt); 156 return -EINVAL; 157 } 158 159 zone.type = BLK_ZONE_TYPE_SEQWRITE_REQ; 160 zone.cond = entry->zs >> 4; 161 zone.len = ns->zsze; 162 zone.capacity = nvme_lba_to_sect(ns, le64_to_cpu(entry->zcap)); 163 zone.start = nvme_lba_to_sect(ns, le64_to_cpu(entry->zslba)); 164 zone.wp = nvme_lba_to_sect(ns, le64_to_cpu(entry->wp)); 165 166 return cb(&zone, idx, data); 167} 168 169static int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector, 170 unsigned int nr_zones, report_zones_cb cb, void *data) 171{ 172 struct nvme_zone_report *report; 173 struct nvme_command c = { }; 174 int ret, zone_idx = 0; 175 unsigned int nz, i; 176 size_t buflen; 177 178 report = nvme_zns_alloc_report_buffer(ns, nr_zones, &buflen); 179 if (!report) 180 return -ENOMEM; 181 182 c.zmr.opcode = nvme_cmd_zone_mgmt_recv; 183 c.zmr.nsid = cpu_to_le32(ns->head->ns_id); 184 c.zmr.numd = cpu_to_le32(nvme_bytes_to_numd(buflen)); 185 c.zmr.zra = NVME_ZRA_ZONE_REPORT; 186 c.zmr.zrasf = NVME_ZRASF_ZONE_REPORT_ALL; 187 c.zmr.pr = NVME_REPORT_ZONE_PARTIAL; 188 189 sector &= ~(ns->zsze - 1); 190 while (zone_idx < nr_zones && sector < get_capacity(ns->disk)) { 191 memset(report, 0, buflen); 192 193 c.zmr.slba = cpu_to_le64(nvme_sect_to_lba(ns, sector)); 194 ret = nvme_submit_sync_cmd(ns->queue, &c, report, buflen); 195 if (ret) { 196 if (ret > 0) 197 ret = -EIO; 198 goto out_free; 199 } 200 201 nz = min((unsigned int)le64_to_cpu(report->nr_zones), nr_zones); 202 if (!nz) 203 break; 204 205 for (i = 0; i < nz && zone_idx < nr_zones; i++) { 206 ret = nvme_zone_parse_entry(ns, &report->entries[i], 207 zone_idx, cb, data); 208 if (ret) 209 goto out_free; 210 zone_idx++; 211 } 212 213 sector += ns->zsze * nz; 214 } 215 216 if (zone_idx > 0) 217 ret = zone_idx; 218 else 219 ret = -EINVAL; 220out_free: 221 kvfree(report); 222 return ret; 223} 224 225int nvme_report_zones(struct gendisk *disk, sector_t sector, 226 unsigned int nr_zones, report_zones_cb cb, void *data) 227{ 228 struct nvme_ns_head *head = NULL; 229 struct nvme_ns *ns; 230 int srcu_idx, ret; 231 232 ns = nvme_get_ns_from_disk(disk, &head, &srcu_idx); 233 if (unlikely(!ns)) 234 return -EWOULDBLOCK; 235 236 if (ns->head->ids.csi == NVME_CSI_ZNS) 237 ret = nvme_ns_report_zones(ns, sector, nr_zones, cb, data); 238 else 239 ret = -EINVAL; 240 nvme_put_ns_from_disk(head, srcu_idx); 241 242 return ret; 243} 244 245blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req, 246 struct nvme_command *c, enum nvme_zone_mgmt_action action) 247{ 248 c->zms.opcode = nvme_cmd_zone_mgmt_send; 249 c->zms.nsid = cpu_to_le32(ns->head->ns_id); 250 c->zms.slba = cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req))); 251 c->zms.zsa = action; 252 253 if (req_op(req) == REQ_OP_ZONE_RESET_ALL) 254 c->zms.select_all = 1; 255 256 return BLK_STS_OK; 257} 258