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 nvme_set_max_append(struct nvme_ctrl * ctrl)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 nvme_query_zone_info(struct nvme_ns * ns,unsigned lbaf,struct nvme_zone_info * zi)38 int 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; 102 103 free_data: 104 kfree(id); 105 return status; 106 } 107 nvme_update_zone_info(struct nvme_ns * ns,struct queue_limits * lim,struct nvme_zone_info * zi)108 void nvme_update_zone_info(struct nvme_ns *ns, struct queue_limits *lim, 109 struct nvme_zone_info *zi) 110 { 111 lim->features |= BLK_FEAT_ZONED; 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 } 118 nvme_zns_alloc_report_buffer(struct nvme_ns * ns,unsigned int nr_zones,size_t * buflen)119 static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns, 120 unsigned int nr_zones, size_t *buflen) 121 { 122 struct request_queue *q = ns->disk->queue; 123 size_t bufsize; 124 void *buf; 125 126 const size_t min_bufsize = sizeof(struct nvme_zone_report) + 127 sizeof(struct nvme_zone_descriptor); 128 129 nr_zones = min_t(unsigned int, nr_zones, 130 get_capacity(ns->disk) >> ilog2(ns->head->zsze)); 131 132 bufsize = sizeof(struct nvme_zone_report) + 133 nr_zones * sizeof(struct nvme_zone_descriptor); 134 bufsize = min_t(size_t, bufsize, 135 queue_max_hw_sectors(q) << SECTOR_SHIFT); 136 bufsize = min_t(size_t, bufsize, queue_max_segments(q) << PAGE_SHIFT); 137 138 while (bufsize >= min_bufsize) { 139 buf = __vmalloc(bufsize, GFP_KERNEL | __GFP_NORETRY); 140 if (buf) { 141 *buflen = bufsize; 142 return buf; 143 } 144 bufsize >>= 1; 145 } 146 return NULL; 147 } 148 nvme_zone_parse_entry(struct nvme_ctrl * ctrl,struct nvme_ns_head * head,struct nvme_zone_descriptor * entry,unsigned int idx,report_zones_cb cb,void * data)149 static int nvme_zone_parse_entry(struct nvme_ctrl *ctrl, 150 struct nvme_ns_head *head, 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(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 = head->zsze; 166 zone.capacity = nvme_lba_to_sect(head, le64_to_cpu(entry->zcap)); 167 zone.start = nvme_lba_to_sect(head, 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(head, le64_to_cpu(entry->wp)); 172 173 return cb(&zone, idx, data); 174 } 175 nvme_ns_report_zones(struct nvme_ns * ns,sector_t sector,unsigned int nr_zones,report_zones_cb cb,void * data)176 int 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->head->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->head, 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->ctrl, ns->head, 217 &report->entries[i], 218 zone_idx, cb, data); 219 if (ret) 220 goto out_free; 221 zone_idx++; 222 } 223 224 sector += ns->head->zsze * nz; 225 } 226 227 if (zone_idx > 0) 228 ret = zone_idx; 229 else 230 ret = -EINVAL; 231 out_free: 232 kvfree(report); 233 return ret; 234 } 235 nvme_setup_zone_mgmt_send(struct nvme_ns * ns,struct request * req,struct nvme_command * c,enum nvme_zone_mgmt_action action)236 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req, 237 struct nvme_command *c, enum nvme_zone_mgmt_action action) 238 { 239 memset(c, 0, sizeof(*c)); 240 241 c->zms.opcode = nvme_cmd_zone_mgmt_send; 242 c->zms.nsid = cpu_to_le32(ns->head->ns_id); 243 c->zms.slba = cpu_to_le64(nvme_sect_to_lba(ns->head, blk_rq_pos(req))); 244 c->zms.zsa = action; 245 246 if (req_op(req) == REQ_OP_ZONE_RESET_ALL) 247 c->zms.select_all = 1; 248 249 return BLK_STS_OK; 250 } 251