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 14 blk_queue_chunk_sectors(q, ns->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 20static 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 48int 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->zsze = nvme_lba_to_sect(ns, le64_to_cpu(id->lbafe[lbaf].zsze)); 103 if (!is_power_of_2(ns->zsze)) { 104 dev_warn(ns->ctrl->device, 105 "invalid zone size:%llu for namespace:%u\n", 106 ns->zsze, ns->head->ns_id); 107 status = -ENODEV; 108 goto free_data; 109 } 110 111 disk_set_zoned(ns->disk, BLK_ZONED_HM); 112 blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q); 113 disk_set_max_open_zones(ns->disk, le32_to_cpu(id->mor) + 1); 114 disk_set_max_active_zones(ns->disk, le32_to_cpu(id->mar) + 1); 115free_data: 116 kfree(id); 117 return status; 118} 119 120static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns, 121 unsigned int nr_zones, size_t *buflen) 122{ 123 struct request_queue *q = ns->disk->queue; 124 size_t bufsize; 125 void *buf; 126 127 const size_t min_bufsize = sizeof(struct nvme_zone_report) + 128 sizeof(struct nvme_zone_descriptor); 129 130 nr_zones = min_t(unsigned int, nr_zones, 131 get_capacity(ns->disk) >> ilog2(ns->zsze)); 132 133 bufsize = sizeof(struct nvme_zone_report) + 134 nr_zones * sizeof(struct nvme_zone_descriptor); 135 bufsize = min_t(size_t, bufsize, 136 queue_max_hw_sectors(q) << SECTOR_SHIFT); 137 bufsize = min_t(size_t, bufsize, queue_max_segments(q) << PAGE_SHIFT); 138 139 while (bufsize >= min_bufsize) { 140 buf = __vmalloc(bufsize, GFP_KERNEL | __GFP_NORETRY); 141 if (buf) { 142 *buflen = bufsize; 143 return buf; 144 } 145 bufsize >>= 1; 146 } 147 return NULL; 148} 149 150static int nvme_zone_parse_entry(struct nvme_ns *ns, 151 struct nvme_zone_descriptor *entry, 152 unsigned int idx, report_zones_cb cb, 153 void *data) 154{ 155 struct blk_zone zone = { }; 156 157 if ((entry->zt & 0xf) != NVME_ZONE_TYPE_SEQWRITE_REQ) { 158 dev_err(ns->ctrl->device, "invalid zone type %#x\n", 159 entry->zt); 160 return -EINVAL; 161 } 162 163 zone.type = BLK_ZONE_TYPE_SEQWRITE_REQ; 164 zone.cond = entry->zs >> 4; 165 zone.len = ns->zsze; 166 zone.capacity = nvme_lba_to_sect(ns, le64_to_cpu(entry->zcap)); 167 zone.start = nvme_lba_to_sect(ns, le64_to_cpu(entry->zslba)); 168 if (zone.cond == BLK_ZONE_COND_FULL) 169 zone.wp = zone.start + zone.len; 170 else 171 zone.wp = nvme_lba_to_sect(ns, le64_to_cpu(entry->wp)); 172 173 return cb(&zone, idx, data); 174} 175 176int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector, 177 unsigned int nr_zones, report_zones_cb cb, void *data) 178{ 179 struct nvme_zone_report *report; 180 struct nvme_command c = { }; 181 int ret, zone_idx = 0; 182 unsigned int nz, i; 183 size_t buflen; 184 185 if (ns->head->ids.csi != NVME_CSI_ZNS) 186 return -EINVAL; 187 188 report = nvme_zns_alloc_report_buffer(ns, nr_zones, &buflen); 189 if (!report) 190 return -ENOMEM; 191 192 c.zmr.opcode = nvme_cmd_zone_mgmt_recv; 193 c.zmr.nsid = cpu_to_le32(ns->head->ns_id); 194 c.zmr.numd = cpu_to_le32(nvme_bytes_to_numd(buflen)); 195 c.zmr.zra = NVME_ZRA_ZONE_REPORT; 196 c.zmr.zrasf = NVME_ZRASF_ZONE_REPORT_ALL; 197 c.zmr.pr = NVME_REPORT_ZONE_PARTIAL; 198 199 sector &= ~(ns->zsze - 1); 200 while (zone_idx < nr_zones && sector < get_capacity(ns->disk)) { 201 memset(report, 0, buflen); 202 203 c.zmr.slba = cpu_to_le64(nvme_sect_to_lba(ns, sector)); 204 ret = nvme_submit_sync_cmd(ns->queue, &c, report, buflen); 205 if (ret) { 206 if (ret > 0) 207 ret = -EIO; 208 goto out_free; 209 } 210 211 nz = min((unsigned int)le64_to_cpu(report->nr_zones), nr_zones); 212 if (!nz) 213 break; 214 215 for (i = 0; i < nz && zone_idx < nr_zones; i++) { 216 ret = nvme_zone_parse_entry(ns, &report->entries[i], 217 zone_idx, cb, data); 218 if (ret) 219 goto out_free; 220 zone_idx++; 221 } 222 223 sector += ns->zsze * nz; 224 } 225 226 if (zone_idx > 0) 227 ret = zone_idx; 228 else 229 ret = -EINVAL; 230out_free: 231 kvfree(report); 232 return ret; 233} 234 235blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req, 236 struct nvme_command *c, enum nvme_zone_mgmt_action action) 237{ 238 memset(c, 0, sizeof(*c)); 239 240 c->zms.opcode = nvme_cmd_zone_mgmt_send; 241 c->zms.nsid = cpu_to_le32(ns->head->ns_id); 242 c->zms.slba = cpu_to_le64(nvme_sect_to_lba(ns, blk_rq_pos(req))); 243 c->zms.zsa = action; 244 245 if (req_op(req) == REQ_OP_ZONE_RESET_ALL) 246 c->zms.select_all = 1; 247 248 return BLK_STS_OK; 249} 250