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