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 10static 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 38int nvme_query_zone_info(struct nvme_ns *ns, unsigned lbaf, 39 struct nvme_zone_info *zi) 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 zi->zone_size = le64_to_cpu(id->lbafe[lbaf].zsze); 93 if (!is_power_of_2(zi->zone_size)) { 94 dev_warn(ns->ctrl->device, 95 "invalid zone size: %llu for namespace: %u\n", 96 zi->zone_size, ns->head->ns_id); 97 status = -ENODEV; 98 goto free_data; 99 } 100 zi->max_open_zones = le32_to_cpu(id->mor) + 1; 101 zi->max_active_zones = le32_to_cpu(id->mar) + 1; 102 103free_data: 104 kfree(id); 105 return status; 106} 107 108void nvme_update_zone_info(struct nvme_ns *ns, struct queue_limits *lim, 109 struct nvme_zone_info *zi) 110{ 111 lim->zoned = 1; 112 lim->max_open_zones = zi->max_open_zones; 113 lim->max_active_zones = zi->max_active_zones; 114 lim->max_zone_append_sectors = ns->ctrl->max_zone_append; 115 lim->chunk_sectors = ns->head->zsze = 116 nvme_lba_to_sect(ns->head, zi->zone_size); 117 blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, ns->queue); 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->head->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_ctrl *ctrl, 151 struct nvme_ns_head *head, 152 struct nvme_zone_descriptor *entry, 153 unsigned int idx, report_zones_cb cb, 154 void *data) 155{ 156 struct blk_zone zone = { }; 157 158 if ((entry->zt & 0xf) != NVME_ZONE_TYPE_SEQWRITE_REQ) { 159 dev_err(ctrl->device, "invalid zone type %#x\n", 160 entry->zt); 161 return -EINVAL; 162 } 163 164 zone.type = BLK_ZONE_TYPE_SEQWRITE_REQ; 165 zone.cond = entry->zs >> 4; 166 zone.len = head->zsze; 167 zone.capacity = nvme_lba_to_sect(head, le64_to_cpu(entry->zcap)); 168 zone.start = nvme_lba_to_sect(head, le64_to_cpu(entry->zslba)); 169 if (zone.cond == BLK_ZONE_COND_FULL) 170 zone.wp = zone.start + zone.len; 171 else 172 zone.wp = nvme_lba_to_sect(head, le64_to_cpu(entry->wp)); 173 174 return cb(&zone, idx, data); 175} 176 177int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector, 178 unsigned int nr_zones, report_zones_cb cb, void *data) 179{ 180 struct nvme_zone_report *report; 181 struct nvme_command c = { }; 182 int ret, zone_idx = 0; 183 unsigned int nz, i; 184 size_t buflen; 185 186 if (ns->head->ids.csi != NVME_CSI_ZNS) 187 return -EINVAL; 188 189 report = nvme_zns_alloc_report_buffer(ns, nr_zones, &buflen); 190 if (!report) 191 return -ENOMEM; 192 193 c.zmr.opcode = nvme_cmd_zone_mgmt_recv; 194 c.zmr.nsid = cpu_to_le32(ns->head->ns_id); 195 c.zmr.numd = cpu_to_le32(nvme_bytes_to_numd(buflen)); 196 c.zmr.zra = NVME_ZRA_ZONE_REPORT; 197 c.zmr.zrasf = NVME_ZRASF_ZONE_REPORT_ALL; 198 c.zmr.pr = NVME_REPORT_ZONE_PARTIAL; 199 200 sector &= ~(ns->head->zsze - 1); 201 while (zone_idx < nr_zones && sector < get_capacity(ns->disk)) { 202 memset(report, 0, buflen); 203 204 c.zmr.slba = cpu_to_le64(nvme_sect_to_lba(ns->head, sector)); 205 ret = nvme_submit_sync_cmd(ns->queue, &c, report, buflen); 206 if (ret) { 207 if (ret > 0) 208 ret = -EIO; 209 goto out_free; 210 } 211 212 nz = min((unsigned int)le64_to_cpu(report->nr_zones), nr_zones); 213 if (!nz) 214 break; 215 216 for (i = 0; i < nz && zone_idx < nr_zones; i++) { 217 ret = nvme_zone_parse_entry(ns->ctrl, ns->head, 218 &report->entries[i], 219 zone_idx, cb, data); 220 if (ret) 221 goto out_free; 222 zone_idx++; 223 } 224 225 sector += ns->head->zsze * nz; 226 } 227 228 if (zone_idx > 0) 229 ret = zone_idx; 230 else 231 ret = -EINVAL; 232out_free: 233 kvfree(report); 234 return ret; 235} 236 237blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req, 238 struct nvme_command *c, enum nvme_zone_mgmt_action action) 239{ 240 memset(c, 0, sizeof(*c)); 241 242 c->zms.opcode = nvme_cmd_zone_mgmt_send; 243 c->zms.nsid = cpu_to_le32(ns->head->ns_id); 244 c->zms.slba = cpu_to_le64(nvme_sect_to_lba(ns->head, blk_rq_pos(req))); 245 c->zms.zsa = action; 246 247 if (req_op(req) == REQ_OP_ZONE_RESET_ALL) 248 c->zms.select_all = 1; 249 250 return BLK_STS_OK; 251} 252