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