13f2304f8SSagi Grimberg // SPDX-License-Identifier: GPL-2.0 23f2304f8SSagi Grimberg /* 33f2304f8SSagi Grimberg * NVMe over Fabrics TCP host. 43f2304f8SSagi Grimberg * Copyright (c) 2018 Lightbits Labs. All rights reserved. 53f2304f8SSagi Grimberg */ 63f2304f8SSagi Grimberg #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 73f2304f8SSagi Grimberg #include <linux/module.h> 83f2304f8SSagi Grimberg #include <linux/init.h> 93f2304f8SSagi Grimberg #include <linux/slab.h> 103f2304f8SSagi Grimberg #include <linux/err.h> 113f2304f8SSagi Grimberg #include <linux/nvme-tcp.h> 123f2304f8SSagi Grimberg #include <net/sock.h> 133f2304f8SSagi Grimberg #include <net/tcp.h> 143f2304f8SSagi Grimberg #include <linux/blk-mq.h> 153f2304f8SSagi Grimberg #include <crypto/hash.h> 161a9460ceSSagi Grimberg #include <net/busy_poll.h> 173f2304f8SSagi Grimberg 183f2304f8SSagi Grimberg #include "nvme.h" 193f2304f8SSagi Grimberg #include "fabrics.h" 203f2304f8SSagi Grimberg 213f2304f8SSagi Grimberg struct nvme_tcp_queue; 223f2304f8SSagi Grimberg 239912ade3SWunderlich, Mark /* Define the socket priority to use for connections were it is desirable 249912ade3SWunderlich, Mark * that the NIC consider performing optimized packet processing or filtering. 259912ade3SWunderlich, Mark * A non-zero value being sufficient to indicate general consideration of any 269912ade3SWunderlich, Mark * possible optimization. Making it a module param allows for alternative 279912ade3SWunderlich, Mark * values that may be unique for some NIC implementations. 289912ade3SWunderlich, Mark */ 299912ade3SWunderlich, Mark static int so_priority; 309912ade3SWunderlich, Mark module_param(so_priority, int, 0644); 319912ade3SWunderlich, Mark MODULE_PARM_DESC(so_priority, "nvme tcp socket optimize priority"); 329912ade3SWunderlich, Mark 333f2304f8SSagi Grimberg enum nvme_tcp_send_state { 343f2304f8SSagi Grimberg NVME_TCP_SEND_CMD_PDU = 0, 353f2304f8SSagi Grimberg NVME_TCP_SEND_H2C_PDU, 363f2304f8SSagi Grimberg NVME_TCP_SEND_DATA, 373f2304f8SSagi Grimberg NVME_TCP_SEND_DDGST, 383f2304f8SSagi Grimberg }; 393f2304f8SSagi Grimberg 403f2304f8SSagi Grimberg struct nvme_tcp_request { 413f2304f8SSagi Grimberg struct nvme_request req; 423f2304f8SSagi Grimberg void *pdu; 433f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 443f2304f8SSagi Grimberg u32 data_len; 453f2304f8SSagi Grimberg u32 pdu_len; 463f2304f8SSagi Grimberg u32 pdu_sent; 473f2304f8SSagi Grimberg u16 ttag; 483f2304f8SSagi Grimberg struct list_head entry; 4915ec928aSSagi Grimberg struct llist_node lentry; 50a7273d40SChristoph Hellwig __le32 ddgst; 513f2304f8SSagi Grimberg 523f2304f8SSagi Grimberg struct bio *curr_bio; 533f2304f8SSagi Grimberg struct iov_iter iter; 543f2304f8SSagi Grimberg 553f2304f8SSagi Grimberg /* send state */ 563f2304f8SSagi Grimberg size_t offset; 573f2304f8SSagi Grimberg size_t data_sent; 583f2304f8SSagi Grimberg enum nvme_tcp_send_state state; 593f2304f8SSagi Grimberg }; 603f2304f8SSagi Grimberg 613f2304f8SSagi Grimberg enum nvme_tcp_queue_flags { 623f2304f8SSagi Grimberg NVME_TCP_Q_ALLOCATED = 0, 633f2304f8SSagi Grimberg NVME_TCP_Q_LIVE = 1, 6472e5d757SSagi Grimberg NVME_TCP_Q_POLLING = 2, 653f2304f8SSagi Grimberg }; 663f2304f8SSagi Grimberg 673f2304f8SSagi Grimberg enum nvme_tcp_recv_state { 683f2304f8SSagi Grimberg NVME_TCP_RECV_PDU = 0, 693f2304f8SSagi Grimberg NVME_TCP_RECV_DATA, 703f2304f8SSagi Grimberg NVME_TCP_RECV_DDGST, 713f2304f8SSagi Grimberg }; 723f2304f8SSagi Grimberg 733f2304f8SSagi Grimberg struct nvme_tcp_ctrl; 743f2304f8SSagi Grimberg struct nvme_tcp_queue { 753f2304f8SSagi Grimberg struct socket *sock; 763f2304f8SSagi Grimberg struct work_struct io_work; 773f2304f8SSagi Grimberg int io_cpu; 783f2304f8SSagi Grimberg 799ebbfe49SChao Leng struct mutex queue_lock; 80db5ad6b7SSagi Grimberg struct mutex send_mutex; 8115ec928aSSagi Grimberg struct llist_head req_list; 823f2304f8SSagi Grimberg struct list_head send_list; 83122e5b9fSSagi Grimberg bool more_requests; 843f2304f8SSagi Grimberg 853f2304f8SSagi Grimberg /* recv state */ 863f2304f8SSagi Grimberg void *pdu; 873f2304f8SSagi Grimberg int pdu_remaining; 883f2304f8SSagi Grimberg int pdu_offset; 893f2304f8SSagi Grimberg size_t data_remaining; 903f2304f8SSagi Grimberg size_t ddgst_remaining; 911a9460ceSSagi Grimberg unsigned int nr_cqe; 923f2304f8SSagi Grimberg 933f2304f8SSagi Grimberg /* send state */ 943f2304f8SSagi Grimberg struct nvme_tcp_request *request; 953f2304f8SSagi Grimberg 963f2304f8SSagi Grimberg int queue_size; 973f2304f8SSagi Grimberg size_t cmnd_capsule_len; 983f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 993f2304f8SSagi Grimberg unsigned long flags; 1003f2304f8SSagi Grimberg bool rd_enabled; 1013f2304f8SSagi Grimberg 1023f2304f8SSagi Grimberg bool hdr_digest; 1033f2304f8SSagi Grimberg bool data_digest; 1043f2304f8SSagi Grimberg struct ahash_request *rcv_hash; 1053f2304f8SSagi Grimberg struct ahash_request *snd_hash; 1063f2304f8SSagi Grimberg __le32 exp_ddgst; 1073f2304f8SSagi Grimberg __le32 recv_ddgst; 1083f2304f8SSagi Grimberg 1093f2304f8SSagi Grimberg struct page_frag_cache pf_cache; 1103f2304f8SSagi Grimberg 1113f2304f8SSagi Grimberg void (*state_change)(struct sock *); 1123f2304f8SSagi Grimberg void (*data_ready)(struct sock *); 1133f2304f8SSagi Grimberg void (*write_space)(struct sock *); 1143f2304f8SSagi Grimberg }; 1153f2304f8SSagi Grimberg 1163f2304f8SSagi Grimberg struct nvme_tcp_ctrl { 1173f2304f8SSagi Grimberg /* read only in the hot path */ 1183f2304f8SSagi Grimberg struct nvme_tcp_queue *queues; 1193f2304f8SSagi Grimberg struct blk_mq_tag_set tag_set; 1203f2304f8SSagi Grimberg 1213f2304f8SSagi Grimberg /* other member variables */ 1223f2304f8SSagi Grimberg struct list_head list; 1233f2304f8SSagi Grimberg struct blk_mq_tag_set admin_tag_set; 1243f2304f8SSagi Grimberg struct sockaddr_storage addr; 1253f2304f8SSagi Grimberg struct sockaddr_storage src_addr; 1263f2304f8SSagi Grimberg struct nvme_ctrl ctrl; 1273f2304f8SSagi Grimberg 1283f2304f8SSagi Grimberg struct work_struct err_work; 1293f2304f8SSagi Grimberg struct delayed_work connect_work; 1303f2304f8SSagi Grimberg struct nvme_tcp_request async_req; 13164861993SSagi Grimberg u32 io_queues[HCTX_MAX_TYPES]; 1323f2304f8SSagi Grimberg }; 1333f2304f8SSagi Grimberg 1343f2304f8SSagi Grimberg static LIST_HEAD(nvme_tcp_ctrl_list); 1353f2304f8SSagi Grimberg static DEFINE_MUTEX(nvme_tcp_ctrl_mutex); 1363f2304f8SSagi Grimberg static struct workqueue_struct *nvme_tcp_wq; 1376acbd961SRikard Falkeborn static const struct blk_mq_ops nvme_tcp_mq_ops; 1386acbd961SRikard Falkeborn static const struct blk_mq_ops nvme_tcp_admin_mq_ops; 139db5ad6b7SSagi Grimberg static int nvme_tcp_try_send(struct nvme_tcp_queue *queue); 1403f2304f8SSagi Grimberg 1413f2304f8SSagi Grimberg static inline struct nvme_tcp_ctrl *to_tcp_ctrl(struct nvme_ctrl *ctrl) 1423f2304f8SSagi Grimberg { 1433f2304f8SSagi Grimberg return container_of(ctrl, struct nvme_tcp_ctrl, ctrl); 1443f2304f8SSagi Grimberg } 1453f2304f8SSagi Grimberg 1463f2304f8SSagi Grimberg static inline int nvme_tcp_queue_id(struct nvme_tcp_queue *queue) 1473f2304f8SSagi Grimberg { 1483f2304f8SSagi Grimberg return queue - queue->ctrl->queues; 1493f2304f8SSagi Grimberg } 1503f2304f8SSagi Grimberg 1513f2304f8SSagi Grimberg static inline struct blk_mq_tags *nvme_tcp_tagset(struct nvme_tcp_queue *queue) 1523f2304f8SSagi Grimberg { 1533f2304f8SSagi Grimberg u32 queue_idx = nvme_tcp_queue_id(queue); 1543f2304f8SSagi Grimberg 1553f2304f8SSagi Grimberg if (queue_idx == 0) 1563f2304f8SSagi Grimberg return queue->ctrl->admin_tag_set.tags[queue_idx]; 1573f2304f8SSagi Grimberg return queue->ctrl->tag_set.tags[queue_idx - 1]; 1583f2304f8SSagi Grimberg } 1593f2304f8SSagi Grimberg 1603f2304f8SSagi Grimberg static inline u8 nvme_tcp_hdgst_len(struct nvme_tcp_queue *queue) 1613f2304f8SSagi Grimberg { 1623f2304f8SSagi Grimberg return queue->hdr_digest ? NVME_TCP_DIGEST_LENGTH : 0; 1633f2304f8SSagi Grimberg } 1643f2304f8SSagi Grimberg 1653f2304f8SSagi Grimberg static inline u8 nvme_tcp_ddgst_len(struct nvme_tcp_queue *queue) 1663f2304f8SSagi Grimberg { 1673f2304f8SSagi Grimberg return queue->data_digest ? NVME_TCP_DIGEST_LENGTH : 0; 1683f2304f8SSagi Grimberg } 1693f2304f8SSagi Grimberg 1703f2304f8SSagi Grimberg static inline size_t nvme_tcp_inline_data_size(struct nvme_tcp_queue *queue) 1713f2304f8SSagi Grimberg { 1723f2304f8SSagi Grimberg return queue->cmnd_capsule_len - sizeof(struct nvme_command); 1733f2304f8SSagi Grimberg } 1743f2304f8SSagi Grimberg 1753f2304f8SSagi Grimberg static inline bool nvme_tcp_async_req(struct nvme_tcp_request *req) 1763f2304f8SSagi Grimberg { 1773f2304f8SSagi Grimberg return req == &req->queue->ctrl->async_req; 1783f2304f8SSagi Grimberg } 1793f2304f8SSagi Grimberg 1803f2304f8SSagi Grimberg static inline bool nvme_tcp_has_inline_data(struct nvme_tcp_request *req) 1813f2304f8SSagi Grimberg { 1823f2304f8SSagi Grimberg struct request *rq; 1833f2304f8SSagi Grimberg 1843f2304f8SSagi Grimberg if (unlikely(nvme_tcp_async_req(req))) 1853f2304f8SSagi Grimberg return false; /* async events don't have a request */ 1863f2304f8SSagi Grimberg 1873f2304f8SSagi Grimberg rq = blk_mq_rq_from_pdu(req); 1883f2304f8SSagi Grimberg 18925e5cb78SSagi Grimberg return rq_data_dir(rq) == WRITE && req->data_len && 19025e5cb78SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(req->queue); 1913f2304f8SSagi Grimberg } 1923f2304f8SSagi Grimberg 1933f2304f8SSagi Grimberg static inline struct page *nvme_tcp_req_cur_page(struct nvme_tcp_request *req) 1943f2304f8SSagi Grimberg { 1953f2304f8SSagi Grimberg return req->iter.bvec->bv_page; 1963f2304f8SSagi Grimberg } 1973f2304f8SSagi Grimberg 1983f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_cur_offset(struct nvme_tcp_request *req) 1993f2304f8SSagi Grimberg { 2003f2304f8SSagi Grimberg return req->iter.bvec->bv_offset + req->iter.iov_offset; 2013f2304f8SSagi Grimberg } 2023f2304f8SSagi Grimberg 2033f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_cur_length(struct nvme_tcp_request *req) 2043f2304f8SSagi Grimberg { 205ca1ff67dSSagi Grimberg return min_t(size_t, iov_iter_single_seg_count(&req->iter), 2063f2304f8SSagi Grimberg req->pdu_len - req->pdu_sent); 2073f2304f8SSagi Grimberg } 2083f2304f8SSagi Grimberg 2093f2304f8SSagi Grimberg static inline size_t nvme_tcp_pdu_data_left(struct nvme_tcp_request *req) 2103f2304f8SSagi Grimberg { 2113f2304f8SSagi Grimberg return rq_data_dir(blk_mq_rq_from_pdu(req)) == WRITE ? 2123f2304f8SSagi Grimberg req->pdu_len - req->pdu_sent : 0; 2133f2304f8SSagi Grimberg } 2143f2304f8SSagi Grimberg 2153f2304f8SSagi Grimberg static inline size_t nvme_tcp_pdu_last_send(struct nvme_tcp_request *req, 2163f2304f8SSagi Grimberg int len) 2173f2304f8SSagi Grimberg { 2183f2304f8SSagi Grimberg return nvme_tcp_pdu_data_left(req) <= len; 2193f2304f8SSagi Grimberg } 2203f2304f8SSagi Grimberg 2213f2304f8SSagi Grimberg static void nvme_tcp_init_iter(struct nvme_tcp_request *req, 2223f2304f8SSagi Grimberg unsigned int dir) 2233f2304f8SSagi Grimberg { 2243f2304f8SSagi Grimberg struct request *rq = blk_mq_rq_from_pdu(req); 2253f2304f8SSagi Grimberg struct bio_vec *vec; 2263f2304f8SSagi Grimberg unsigned int size; 2270dc9edafSSagi Grimberg int nr_bvec; 2283f2304f8SSagi Grimberg size_t offset; 2293f2304f8SSagi Grimberg 2303f2304f8SSagi Grimberg if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) { 2313f2304f8SSagi Grimberg vec = &rq->special_vec; 2320dc9edafSSagi Grimberg nr_bvec = 1; 2333f2304f8SSagi Grimberg size = blk_rq_payload_bytes(rq); 2343f2304f8SSagi Grimberg offset = 0; 2353f2304f8SSagi Grimberg } else { 2363f2304f8SSagi Grimberg struct bio *bio = req->curr_bio; 2370dc9edafSSagi Grimberg struct bvec_iter bi; 2380dc9edafSSagi Grimberg struct bio_vec bv; 2393f2304f8SSagi Grimberg 2403f2304f8SSagi Grimberg vec = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter); 2410dc9edafSSagi Grimberg nr_bvec = 0; 2420dc9edafSSagi Grimberg bio_for_each_bvec(bv, bio, bi) { 2430dc9edafSSagi Grimberg nr_bvec++; 2440dc9edafSSagi Grimberg } 2453f2304f8SSagi Grimberg size = bio->bi_iter.bi_size; 2463f2304f8SSagi Grimberg offset = bio->bi_iter.bi_bvec_done; 2473f2304f8SSagi Grimberg } 2483f2304f8SSagi Grimberg 2490dc9edafSSagi Grimberg iov_iter_bvec(&req->iter, dir, vec, nr_bvec, size); 2503f2304f8SSagi Grimberg req->iter.iov_offset = offset; 2513f2304f8SSagi Grimberg } 2523f2304f8SSagi Grimberg 2533f2304f8SSagi Grimberg static inline void nvme_tcp_advance_req(struct nvme_tcp_request *req, 2543f2304f8SSagi Grimberg int len) 2553f2304f8SSagi Grimberg { 2563f2304f8SSagi Grimberg req->data_sent += len; 2573f2304f8SSagi Grimberg req->pdu_sent += len; 2583f2304f8SSagi Grimberg iov_iter_advance(&req->iter, len); 2593f2304f8SSagi Grimberg if (!iov_iter_count(&req->iter) && 2603f2304f8SSagi Grimberg req->data_sent < req->data_len) { 2613f2304f8SSagi Grimberg req->curr_bio = req->curr_bio->bi_next; 2623f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 2633f2304f8SSagi Grimberg } 2643f2304f8SSagi Grimberg } 2653f2304f8SSagi Grimberg 2665c11f7d9SSagi Grimberg static inline void nvme_tcp_send_all(struct nvme_tcp_queue *queue) 2675c11f7d9SSagi Grimberg { 2685c11f7d9SSagi Grimberg int ret; 2695c11f7d9SSagi Grimberg 2705c11f7d9SSagi Grimberg /* drain the send queue as much as we can... */ 2715c11f7d9SSagi Grimberg do { 2725c11f7d9SSagi Grimberg ret = nvme_tcp_try_send(queue); 2735c11f7d9SSagi Grimberg } while (ret > 0); 2745c11f7d9SSagi Grimberg } 2755c11f7d9SSagi Grimberg 276db5ad6b7SSagi Grimberg static inline void nvme_tcp_queue_request(struct nvme_tcp_request *req, 27786f0348aSSagi Grimberg bool sync, bool last) 2783f2304f8SSagi Grimberg { 2793f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 280db5ad6b7SSagi Grimberg bool empty; 2813f2304f8SSagi Grimberg 28215ec928aSSagi Grimberg empty = llist_add(&req->lentry, &queue->req_list) && 28315ec928aSSagi Grimberg list_empty(&queue->send_list) && !queue->request; 2843f2304f8SSagi Grimberg 285db5ad6b7SSagi Grimberg /* 286db5ad6b7SSagi Grimberg * if we're the first on the send_list and we can try to send 287db5ad6b7SSagi Grimberg * directly, otherwise queue io_work. Also, only do that if we 288db5ad6b7SSagi Grimberg * are on the same cpu, so we don't introduce contention. 289db5ad6b7SSagi Grimberg */ 290ada83177SSagi Grimberg if (queue->io_cpu == __smp_processor_id() && 291db5ad6b7SSagi Grimberg sync && empty && mutex_trylock(&queue->send_mutex)) { 292122e5b9fSSagi Grimberg queue->more_requests = !last; 2935c11f7d9SSagi Grimberg nvme_tcp_send_all(queue); 294122e5b9fSSagi Grimberg queue->more_requests = false; 295db5ad6b7SSagi Grimberg mutex_unlock(&queue->send_mutex); 29686f0348aSSagi Grimberg } else if (last) { 2973f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 2983f2304f8SSagi Grimberg } 299db5ad6b7SSagi Grimberg } 3003f2304f8SSagi Grimberg 30115ec928aSSagi Grimberg static void nvme_tcp_process_req_list(struct nvme_tcp_queue *queue) 30215ec928aSSagi Grimberg { 30315ec928aSSagi Grimberg struct nvme_tcp_request *req; 30415ec928aSSagi Grimberg struct llist_node *node; 30515ec928aSSagi Grimberg 30615ec928aSSagi Grimberg for (node = llist_del_all(&queue->req_list); node; node = node->next) { 30715ec928aSSagi Grimberg req = llist_entry(node, struct nvme_tcp_request, lentry); 30815ec928aSSagi Grimberg list_add(&req->entry, &queue->send_list); 30915ec928aSSagi Grimberg } 31015ec928aSSagi Grimberg } 31115ec928aSSagi Grimberg 3123f2304f8SSagi Grimberg static inline struct nvme_tcp_request * 3133f2304f8SSagi Grimberg nvme_tcp_fetch_request(struct nvme_tcp_queue *queue) 3143f2304f8SSagi Grimberg { 3153f2304f8SSagi Grimberg struct nvme_tcp_request *req; 3163f2304f8SSagi Grimberg 3173f2304f8SSagi Grimberg req = list_first_entry_or_null(&queue->send_list, 3183f2304f8SSagi Grimberg struct nvme_tcp_request, entry); 31915ec928aSSagi Grimberg if (!req) { 32015ec928aSSagi Grimberg nvme_tcp_process_req_list(queue); 32115ec928aSSagi Grimberg req = list_first_entry_or_null(&queue->send_list, 32215ec928aSSagi Grimberg struct nvme_tcp_request, entry); 32315ec928aSSagi Grimberg if (unlikely(!req)) 32415ec928aSSagi Grimberg return NULL; 32515ec928aSSagi Grimberg } 3263f2304f8SSagi Grimberg 32715ec928aSSagi Grimberg list_del(&req->entry); 3283f2304f8SSagi Grimberg return req; 3293f2304f8SSagi Grimberg } 3303f2304f8SSagi Grimberg 331a7273d40SChristoph Hellwig static inline void nvme_tcp_ddgst_final(struct ahash_request *hash, 332a7273d40SChristoph Hellwig __le32 *dgst) 3333f2304f8SSagi Grimberg { 3343f2304f8SSagi Grimberg ahash_request_set_crypt(hash, NULL, (u8 *)dgst, 0); 3353f2304f8SSagi Grimberg crypto_ahash_final(hash); 3363f2304f8SSagi Grimberg } 3373f2304f8SSagi Grimberg 3383f2304f8SSagi Grimberg static inline void nvme_tcp_ddgst_update(struct ahash_request *hash, 3393f2304f8SSagi Grimberg struct page *page, off_t off, size_t len) 3403f2304f8SSagi Grimberg { 3413f2304f8SSagi Grimberg struct scatterlist sg; 3423f2304f8SSagi Grimberg 3433f2304f8SSagi Grimberg sg_init_marker(&sg, 1); 3443f2304f8SSagi Grimberg sg_set_page(&sg, page, len, off); 3453f2304f8SSagi Grimberg ahash_request_set_crypt(hash, &sg, NULL, len); 3463f2304f8SSagi Grimberg crypto_ahash_update(hash); 3473f2304f8SSagi Grimberg } 3483f2304f8SSagi Grimberg 3493f2304f8SSagi Grimberg static inline void nvme_tcp_hdgst(struct ahash_request *hash, 3503f2304f8SSagi Grimberg void *pdu, size_t len) 3513f2304f8SSagi Grimberg { 3523f2304f8SSagi Grimberg struct scatterlist sg; 3533f2304f8SSagi Grimberg 3543f2304f8SSagi Grimberg sg_init_one(&sg, pdu, len); 3553f2304f8SSagi Grimberg ahash_request_set_crypt(hash, &sg, pdu + len, len); 3563f2304f8SSagi Grimberg crypto_ahash_digest(hash); 3573f2304f8SSagi Grimberg } 3583f2304f8SSagi Grimberg 3593f2304f8SSagi Grimberg static int nvme_tcp_verify_hdgst(struct nvme_tcp_queue *queue, 3603f2304f8SSagi Grimberg void *pdu, size_t pdu_len) 3613f2304f8SSagi Grimberg { 3623f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr = pdu; 3633f2304f8SSagi Grimberg __le32 recv_digest; 3643f2304f8SSagi Grimberg __le32 exp_digest; 3653f2304f8SSagi Grimberg 3663f2304f8SSagi Grimberg if (unlikely(!(hdr->flags & NVME_TCP_F_HDGST))) { 3673f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3683f2304f8SSagi Grimberg "queue %d: header digest flag is cleared\n", 3693f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 3703f2304f8SSagi Grimberg return -EPROTO; 3713f2304f8SSagi Grimberg } 3723f2304f8SSagi Grimberg 3733f2304f8SSagi Grimberg recv_digest = *(__le32 *)(pdu + hdr->hlen); 3743f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->rcv_hash, pdu, pdu_len); 3753f2304f8SSagi Grimberg exp_digest = *(__le32 *)(pdu + hdr->hlen); 3763f2304f8SSagi Grimberg if (recv_digest != exp_digest) { 3773f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3783f2304f8SSagi Grimberg "header digest error: recv %#x expected %#x\n", 3793f2304f8SSagi Grimberg le32_to_cpu(recv_digest), le32_to_cpu(exp_digest)); 3803f2304f8SSagi Grimberg return -EIO; 3813f2304f8SSagi Grimberg } 3823f2304f8SSagi Grimberg 3833f2304f8SSagi Grimberg return 0; 3843f2304f8SSagi Grimberg } 3853f2304f8SSagi Grimberg 3863f2304f8SSagi Grimberg static int nvme_tcp_check_ddgst(struct nvme_tcp_queue *queue, void *pdu) 3873f2304f8SSagi Grimberg { 3883f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr = pdu; 3893f2304f8SSagi Grimberg u8 digest_len = nvme_tcp_hdgst_len(queue); 3903f2304f8SSagi Grimberg u32 len; 3913f2304f8SSagi Grimberg 3923f2304f8SSagi Grimberg len = le32_to_cpu(hdr->plen) - hdr->hlen - 3933f2304f8SSagi Grimberg ((hdr->flags & NVME_TCP_F_HDGST) ? digest_len : 0); 3943f2304f8SSagi Grimberg 3953f2304f8SSagi Grimberg if (unlikely(len && !(hdr->flags & NVME_TCP_F_DDGST))) { 3963f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3973f2304f8SSagi Grimberg "queue %d: data digest flag is cleared\n", 3983f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 3993f2304f8SSagi Grimberg return -EPROTO; 4003f2304f8SSagi Grimberg } 4013f2304f8SSagi Grimberg crypto_ahash_init(queue->rcv_hash); 4023f2304f8SSagi Grimberg 4033f2304f8SSagi Grimberg return 0; 4043f2304f8SSagi Grimberg } 4053f2304f8SSagi Grimberg 4063f2304f8SSagi Grimberg static void nvme_tcp_exit_request(struct blk_mq_tag_set *set, 4073f2304f8SSagi Grimberg struct request *rq, unsigned int hctx_idx) 4083f2304f8SSagi Grimberg { 4093f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 4103f2304f8SSagi Grimberg 4113f2304f8SSagi Grimberg page_frag_free(req->pdu); 4123f2304f8SSagi Grimberg } 4133f2304f8SSagi Grimberg 4143f2304f8SSagi Grimberg static int nvme_tcp_init_request(struct blk_mq_tag_set *set, 4153f2304f8SSagi Grimberg struct request *rq, unsigned int hctx_idx, 4163f2304f8SSagi Grimberg unsigned int numa_node) 4173f2304f8SSagi Grimberg { 4183f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = set->driver_data; 4193f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 420f4b9e6c9SKeith Busch struct nvme_tcp_cmd_pdu *pdu; 4213f2304f8SSagi Grimberg int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; 4223f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[queue_idx]; 4233f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 4243f2304f8SSagi Grimberg 4253f2304f8SSagi Grimberg req->pdu = page_frag_alloc(&queue->pf_cache, 4263f2304f8SSagi Grimberg sizeof(struct nvme_tcp_cmd_pdu) + hdgst, 4273f2304f8SSagi Grimberg GFP_KERNEL | __GFP_ZERO); 4283f2304f8SSagi Grimberg if (!req->pdu) 4293f2304f8SSagi Grimberg return -ENOMEM; 4303f2304f8SSagi Grimberg 431f4b9e6c9SKeith Busch pdu = req->pdu; 4323f2304f8SSagi Grimberg req->queue = queue; 4333f2304f8SSagi Grimberg nvme_req(rq)->ctrl = &ctrl->ctrl; 434f4b9e6c9SKeith Busch nvme_req(rq)->cmd = &pdu->cmd; 4353f2304f8SSagi Grimberg 4363f2304f8SSagi Grimberg return 0; 4373f2304f8SSagi Grimberg } 4383f2304f8SSagi Grimberg 4393f2304f8SSagi Grimberg static int nvme_tcp_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 4403f2304f8SSagi Grimberg unsigned int hctx_idx) 4413f2304f8SSagi Grimberg { 4423f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = data; 4433f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[hctx_idx + 1]; 4443f2304f8SSagi Grimberg 4453f2304f8SSagi Grimberg hctx->driver_data = queue; 4463f2304f8SSagi Grimberg return 0; 4473f2304f8SSagi Grimberg } 4483f2304f8SSagi Grimberg 4493f2304f8SSagi Grimberg static int nvme_tcp_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, 4503f2304f8SSagi Grimberg unsigned int hctx_idx) 4513f2304f8SSagi Grimberg { 4523f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = data; 4533f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 4543f2304f8SSagi Grimberg 4553f2304f8SSagi Grimberg hctx->driver_data = queue; 4563f2304f8SSagi Grimberg return 0; 4573f2304f8SSagi Grimberg } 4583f2304f8SSagi Grimberg 4593f2304f8SSagi Grimberg static enum nvme_tcp_recv_state 4603f2304f8SSagi Grimberg nvme_tcp_recv_state(struct nvme_tcp_queue *queue) 4613f2304f8SSagi Grimberg { 4623f2304f8SSagi Grimberg return (queue->pdu_remaining) ? NVME_TCP_RECV_PDU : 4633f2304f8SSagi Grimberg (queue->ddgst_remaining) ? NVME_TCP_RECV_DDGST : 4643f2304f8SSagi Grimberg NVME_TCP_RECV_DATA; 4653f2304f8SSagi Grimberg } 4663f2304f8SSagi Grimberg 4673f2304f8SSagi Grimberg static void nvme_tcp_init_recv_ctx(struct nvme_tcp_queue *queue) 4683f2304f8SSagi Grimberg { 4693f2304f8SSagi Grimberg queue->pdu_remaining = sizeof(struct nvme_tcp_rsp_pdu) + 4703f2304f8SSagi Grimberg nvme_tcp_hdgst_len(queue); 4713f2304f8SSagi Grimberg queue->pdu_offset = 0; 4723f2304f8SSagi Grimberg queue->data_remaining = -1; 4733f2304f8SSagi Grimberg queue->ddgst_remaining = 0; 4743f2304f8SSagi Grimberg } 4753f2304f8SSagi Grimberg 4763f2304f8SSagi Grimberg static void nvme_tcp_error_recovery(struct nvme_ctrl *ctrl) 4773f2304f8SSagi Grimberg { 4783f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) 4793f2304f8SSagi Grimberg return; 4803f2304f8SSagi Grimberg 481236187c4SSagi Grimberg dev_warn(ctrl->device, "starting error recovery\n"); 48297b2512aSNigel Kirkland queue_work(nvme_reset_wq, &to_tcp_ctrl(ctrl)->err_work); 4833f2304f8SSagi Grimberg } 4843f2304f8SSagi Grimberg 4853f2304f8SSagi Grimberg static int nvme_tcp_process_nvme_cqe(struct nvme_tcp_queue *queue, 4863f2304f8SSagi Grimberg struct nvme_completion *cqe) 4873f2304f8SSagi Grimberg { 4883f2304f8SSagi Grimberg struct request *rq; 4893f2304f8SSagi Grimberg 4903f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), cqe->command_id); 4913f2304f8SSagi Grimberg if (!rq) { 4923f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 4933f2304f8SSagi Grimberg "queue %d tag 0x%x not found\n", 4943f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), cqe->command_id); 4953f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 4963f2304f8SSagi Grimberg return -EINVAL; 4973f2304f8SSagi Grimberg } 4983f2304f8SSagi Grimberg 4992eb81a33SChristoph Hellwig if (!nvme_try_complete_req(rq, cqe->status, cqe->result)) 500ff029451SChristoph Hellwig nvme_complete_rq(rq); 5011a9460ceSSagi Grimberg queue->nr_cqe++; 5023f2304f8SSagi Grimberg 5033f2304f8SSagi Grimberg return 0; 5043f2304f8SSagi Grimberg } 5053f2304f8SSagi Grimberg 5063f2304f8SSagi Grimberg static int nvme_tcp_handle_c2h_data(struct nvme_tcp_queue *queue, 5073f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu) 5083f2304f8SSagi Grimberg { 5093f2304f8SSagi Grimberg struct request *rq; 5103f2304f8SSagi Grimberg 5113f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 5123f2304f8SSagi Grimberg if (!rq) { 5133f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5143f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 5153f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 5163f2304f8SSagi Grimberg return -ENOENT; 5173f2304f8SSagi Grimberg } 5183f2304f8SSagi Grimberg 5193f2304f8SSagi Grimberg if (!blk_rq_payload_bytes(rq)) { 5203f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5213f2304f8SSagi Grimberg "queue %d tag %#x unexpected data\n", 5223f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 5233f2304f8SSagi Grimberg return -EIO; 5243f2304f8SSagi Grimberg } 5253f2304f8SSagi Grimberg 5263f2304f8SSagi Grimberg queue->data_remaining = le32_to_cpu(pdu->data_length); 5273f2304f8SSagi Grimberg 528602d674cSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS && 529602d674cSSagi Grimberg unlikely(!(pdu->hdr.flags & NVME_TCP_F_DATA_LAST))) { 530602d674cSSagi Grimberg dev_err(queue->ctrl->ctrl.device, 531602d674cSSagi Grimberg "queue %d tag %#x SUCCESS set but not last PDU\n", 532602d674cSSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 533602d674cSSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 534602d674cSSagi Grimberg return -EPROTO; 535602d674cSSagi Grimberg } 536602d674cSSagi Grimberg 5373f2304f8SSagi Grimberg return 0; 5383f2304f8SSagi Grimberg } 5393f2304f8SSagi Grimberg 5403f2304f8SSagi Grimberg static int nvme_tcp_handle_comp(struct nvme_tcp_queue *queue, 5413f2304f8SSagi Grimberg struct nvme_tcp_rsp_pdu *pdu) 5423f2304f8SSagi Grimberg { 5433f2304f8SSagi Grimberg struct nvme_completion *cqe = &pdu->cqe; 5443f2304f8SSagi Grimberg int ret = 0; 5453f2304f8SSagi Grimberg 5463f2304f8SSagi Grimberg /* 5473f2304f8SSagi Grimberg * AEN requests are special as they don't time out and can 5483f2304f8SSagi Grimberg * survive any kind of queue freeze and often don't respond to 5493f2304f8SSagi Grimberg * aborts. We don't even bother to allocate a struct request 5503f2304f8SSagi Grimberg * for them but rather special case them here. 5513f2304f8SSagi Grimberg */ 55258a8df67SIsrael Rukshin if (unlikely(nvme_is_aen_req(nvme_tcp_queue_id(queue), 55358a8df67SIsrael Rukshin cqe->command_id))) 5543f2304f8SSagi Grimberg nvme_complete_async_event(&queue->ctrl->ctrl, cqe->status, 5553f2304f8SSagi Grimberg &cqe->result); 5563f2304f8SSagi Grimberg else 5573f2304f8SSagi Grimberg ret = nvme_tcp_process_nvme_cqe(queue, cqe); 5583f2304f8SSagi Grimberg 5593f2304f8SSagi Grimberg return ret; 5603f2304f8SSagi Grimberg } 5613f2304f8SSagi Grimberg 5623f2304f8SSagi Grimberg static int nvme_tcp_setup_h2c_data_pdu(struct nvme_tcp_request *req, 5633f2304f8SSagi Grimberg struct nvme_tcp_r2t_pdu *pdu) 5643f2304f8SSagi Grimberg { 5653f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *data = req->pdu; 5663f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 5673f2304f8SSagi Grimberg struct request *rq = blk_mq_rq_from_pdu(req); 5683f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 5693f2304f8SSagi Grimberg u8 ddgst = nvme_tcp_ddgst_len(queue); 5703f2304f8SSagi Grimberg 5713f2304f8SSagi Grimberg req->pdu_len = le32_to_cpu(pdu->r2t_length); 5723f2304f8SSagi Grimberg req->pdu_sent = 0; 5733f2304f8SSagi Grimberg 5743f2304f8SSagi Grimberg if (unlikely(req->data_sent + req->pdu_len > req->data_len)) { 5753f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5763f2304f8SSagi Grimberg "req %d r2t len %u exceeded data len %u (%zu sent)\n", 5773f2304f8SSagi Grimberg rq->tag, req->pdu_len, req->data_len, 5783f2304f8SSagi Grimberg req->data_sent); 5793f2304f8SSagi Grimberg return -EPROTO; 5803f2304f8SSagi Grimberg } 5813f2304f8SSagi Grimberg 5823f2304f8SSagi Grimberg if (unlikely(le32_to_cpu(pdu->r2t_offset) < req->data_sent)) { 5833f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5843f2304f8SSagi Grimberg "req %d unexpected r2t offset %u (expected %zu)\n", 5853f2304f8SSagi Grimberg rq->tag, le32_to_cpu(pdu->r2t_offset), 5863f2304f8SSagi Grimberg req->data_sent); 5873f2304f8SSagi Grimberg return -EPROTO; 5883f2304f8SSagi Grimberg } 5893f2304f8SSagi Grimberg 5903f2304f8SSagi Grimberg memset(data, 0, sizeof(*data)); 5913f2304f8SSagi Grimberg data->hdr.type = nvme_tcp_h2c_data; 5923f2304f8SSagi Grimberg data->hdr.flags = NVME_TCP_F_DATA_LAST; 5933f2304f8SSagi Grimberg if (queue->hdr_digest) 5943f2304f8SSagi Grimberg data->hdr.flags |= NVME_TCP_F_HDGST; 5953f2304f8SSagi Grimberg if (queue->data_digest) 5963f2304f8SSagi Grimberg data->hdr.flags |= NVME_TCP_F_DDGST; 5973f2304f8SSagi Grimberg data->hdr.hlen = sizeof(*data); 5983f2304f8SSagi Grimberg data->hdr.pdo = data->hdr.hlen + hdgst; 5993f2304f8SSagi Grimberg data->hdr.plen = 6003f2304f8SSagi Grimberg cpu_to_le32(data->hdr.hlen + hdgst + req->pdu_len + ddgst); 6013f2304f8SSagi Grimberg data->ttag = pdu->ttag; 6023f2304f8SSagi Grimberg data->command_id = rq->tag; 6033f2304f8SSagi Grimberg data->data_offset = cpu_to_le32(req->data_sent); 6043f2304f8SSagi Grimberg data->data_length = cpu_to_le32(req->pdu_len); 6053f2304f8SSagi Grimberg return 0; 6063f2304f8SSagi Grimberg } 6073f2304f8SSagi Grimberg 6083f2304f8SSagi Grimberg static int nvme_tcp_handle_r2t(struct nvme_tcp_queue *queue, 6093f2304f8SSagi Grimberg struct nvme_tcp_r2t_pdu *pdu) 6103f2304f8SSagi Grimberg { 6113f2304f8SSagi Grimberg struct nvme_tcp_request *req; 6123f2304f8SSagi Grimberg struct request *rq; 6133f2304f8SSagi Grimberg int ret; 6143f2304f8SSagi Grimberg 6153f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 6163f2304f8SSagi Grimberg if (!rq) { 6173f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6183f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 6193f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 6203f2304f8SSagi Grimberg return -ENOENT; 6213f2304f8SSagi Grimberg } 6223f2304f8SSagi Grimberg req = blk_mq_rq_to_pdu(rq); 6233f2304f8SSagi Grimberg 6243f2304f8SSagi Grimberg ret = nvme_tcp_setup_h2c_data_pdu(req, pdu); 6253f2304f8SSagi Grimberg if (unlikely(ret)) 6263f2304f8SSagi Grimberg return ret; 6273f2304f8SSagi Grimberg 6283f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_H2C_PDU; 6293f2304f8SSagi Grimberg req->offset = 0; 6303f2304f8SSagi Grimberg 63186f0348aSSagi Grimberg nvme_tcp_queue_request(req, false, true); 6323f2304f8SSagi Grimberg 6333f2304f8SSagi Grimberg return 0; 6343f2304f8SSagi Grimberg } 6353f2304f8SSagi Grimberg 6363f2304f8SSagi Grimberg static int nvme_tcp_recv_pdu(struct nvme_tcp_queue *queue, struct sk_buff *skb, 6373f2304f8SSagi Grimberg unsigned int *offset, size_t *len) 6383f2304f8SSagi Grimberg { 6393f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr; 6403f2304f8SSagi Grimberg char *pdu = queue->pdu; 6413f2304f8SSagi Grimberg size_t rcv_len = min_t(size_t, *len, queue->pdu_remaining); 6423f2304f8SSagi Grimberg int ret; 6433f2304f8SSagi Grimberg 6443f2304f8SSagi Grimberg ret = skb_copy_bits(skb, *offset, 6453f2304f8SSagi Grimberg &pdu[queue->pdu_offset], rcv_len); 6463f2304f8SSagi Grimberg if (unlikely(ret)) 6473f2304f8SSagi Grimberg return ret; 6483f2304f8SSagi Grimberg 6493f2304f8SSagi Grimberg queue->pdu_remaining -= rcv_len; 6503f2304f8SSagi Grimberg queue->pdu_offset += rcv_len; 6513f2304f8SSagi Grimberg *offset += rcv_len; 6523f2304f8SSagi Grimberg *len -= rcv_len; 6533f2304f8SSagi Grimberg if (queue->pdu_remaining) 6543f2304f8SSagi Grimberg return 0; 6553f2304f8SSagi Grimberg 6563f2304f8SSagi Grimberg hdr = queue->pdu; 6573f2304f8SSagi Grimberg if (queue->hdr_digest) { 6583f2304f8SSagi Grimberg ret = nvme_tcp_verify_hdgst(queue, queue->pdu, hdr->hlen); 6593f2304f8SSagi Grimberg if (unlikely(ret)) 6603f2304f8SSagi Grimberg return ret; 6613f2304f8SSagi Grimberg } 6623f2304f8SSagi Grimberg 6633f2304f8SSagi Grimberg 6643f2304f8SSagi Grimberg if (queue->data_digest) { 6653f2304f8SSagi Grimberg ret = nvme_tcp_check_ddgst(queue, queue->pdu); 6663f2304f8SSagi Grimberg if (unlikely(ret)) 6673f2304f8SSagi Grimberg return ret; 6683f2304f8SSagi Grimberg } 6693f2304f8SSagi Grimberg 6703f2304f8SSagi Grimberg switch (hdr->type) { 6713f2304f8SSagi Grimberg case nvme_tcp_c2h_data: 6726be18260SSagi Grimberg return nvme_tcp_handle_c2h_data(queue, (void *)queue->pdu); 6733f2304f8SSagi Grimberg case nvme_tcp_rsp: 6743f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6756be18260SSagi Grimberg return nvme_tcp_handle_comp(queue, (void *)queue->pdu); 6763f2304f8SSagi Grimberg case nvme_tcp_r2t: 6773f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6786be18260SSagi Grimberg return nvme_tcp_handle_r2t(queue, (void *)queue->pdu); 6793f2304f8SSagi Grimberg default: 6803f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6813f2304f8SSagi Grimberg "unsupported pdu type (%d)\n", hdr->type); 6823f2304f8SSagi Grimberg return -EINVAL; 6833f2304f8SSagi Grimberg } 6843f2304f8SSagi Grimberg } 6853f2304f8SSagi Grimberg 686988aef9eSChristoph Hellwig static inline void nvme_tcp_end_request(struct request *rq, u16 status) 687602d674cSSagi Grimberg { 688602d674cSSagi Grimberg union nvme_result res = {}; 689602d674cSSagi Grimberg 6902eb81a33SChristoph Hellwig if (!nvme_try_complete_req(rq, cpu_to_le16(status << 1), res)) 691ff029451SChristoph Hellwig nvme_complete_rq(rq); 692602d674cSSagi Grimberg } 693602d674cSSagi Grimberg 6943f2304f8SSagi Grimberg static int nvme_tcp_recv_data(struct nvme_tcp_queue *queue, struct sk_buff *skb, 6953f2304f8SSagi Grimberg unsigned int *offset, size_t *len) 6963f2304f8SSagi Grimberg { 6973f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu; 6983f2304f8SSagi Grimberg struct nvme_tcp_request *req; 6993f2304f8SSagi Grimberg struct request *rq; 7003f2304f8SSagi Grimberg 7013f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 7023f2304f8SSagi Grimberg if (!rq) { 7033f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7043f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 7053f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 7063f2304f8SSagi Grimberg return -ENOENT; 7073f2304f8SSagi Grimberg } 7083f2304f8SSagi Grimberg req = blk_mq_rq_to_pdu(rq); 7093f2304f8SSagi Grimberg 7103f2304f8SSagi Grimberg while (true) { 7113f2304f8SSagi Grimberg int recv_len, ret; 7123f2304f8SSagi Grimberg 7133f2304f8SSagi Grimberg recv_len = min_t(size_t, *len, queue->data_remaining); 7143f2304f8SSagi Grimberg if (!recv_len) 7153f2304f8SSagi Grimberg break; 7163f2304f8SSagi Grimberg 7173f2304f8SSagi Grimberg if (!iov_iter_count(&req->iter)) { 7183f2304f8SSagi Grimberg req->curr_bio = req->curr_bio->bi_next; 7193f2304f8SSagi Grimberg 7203f2304f8SSagi Grimberg /* 7213f2304f8SSagi Grimberg * If we don`t have any bios it means that controller 7223f2304f8SSagi Grimberg * sent more data than we requested, hence error 7233f2304f8SSagi Grimberg */ 7243f2304f8SSagi Grimberg if (!req->curr_bio) { 7253f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7263f2304f8SSagi Grimberg "queue %d no space in request %#x", 7273f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 7283f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 7293f2304f8SSagi Grimberg return -EIO; 7303f2304f8SSagi Grimberg } 7313f2304f8SSagi Grimberg nvme_tcp_init_iter(req, READ); 7323f2304f8SSagi Grimberg } 7333f2304f8SSagi Grimberg 7343f2304f8SSagi Grimberg /* we can read only from what is left in this bio */ 7353f2304f8SSagi Grimberg recv_len = min_t(size_t, recv_len, 7363f2304f8SSagi Grimberg iov_iter_count(&req->iter)); 7373f2304f8SSagi Grimberg 7383f2304f8SSagi Grimberg if (queue->data_digest) 7393f2304f8SSagi Grimberg ret = skb_copy_and_hash_datagram_iter(skb, *offset, 7403f2304f8SSagi Grimberg &req->iter, recv_len, queue->rcv_hash); 7413f2304f8SSagi Grimberg else 7423f2304f8SSagi Grimberg ret = skb_copy_datagram_iter(skb, *offset, 7433f2304f8SSagi Grimberg &req->iter, recv_len); 7443f2304f8SSagi Grimberg if (ret) { 7453f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7463f2304f8SSagi Grimberg "queue %d failed to copy request %#x data", 7473f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 7483f2304f8SSagi Grimberg return ret; 7493f2304f8SSagi Grimberg } 7503f2304f8SSagi Grimberg 7513f2304f8SSagi Grimberg *len -= recv_len; 7523f2304f8SSagi Grimberg *offset += recv_len; 7533f2304f8SSagi Grimberg queue->data_remaining -= recv_len; 7543f2304f8SSagi Grimberg } 7553f2304f8SSagi Grimberg 7563f2304f8SSagi Grimberg if (!queue->data_remaining) { 7573f2304f8SSagi Grimberg if (queue->data_digest) { 7583f2304f8SSagi Grimberg nvme_tcp_ddgst_final(queue->rcv_hash, &queue->exp_ddgst); 7593f2304f8SSagi Grimberg queue->ddgst_remaining = NVME_TCP_DIGEST_LENGTH; 7603f2304f8SSagi Grimberg } else { 7611a9460ceSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) { 762602d674cSSagi Grimberg nvme_tcp_end_request(rq, NVME_SC_SUCCESS); 7631a9460ceSSagi Grimberg queue->nr_cqe++; 7641a9460ceSSagi Grimberg } 7653f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 7663f2304f8SSagi Grimberg } 7673f2304f8SSagi Grimberg } 7683f2304f8SSagi Grimberg 7693f2304f8SSagi Grimberg return 0; 7703f2304f8SSagi Grimberg } 7713f2304f8SSagi Grimberg 7723f2304f8SSagi Grimberg static int nvme_tcp_recv_ddgst(struct nvme_tcp_queue *queue, 7733f2304f8SSagi Grimberg struct sk_buff *skb, unsigned int *offset, size_t *len) 7743f2304f8SSagi Grimberg { 775602d674cSSagi Grimberg struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu; 7763f2304f8SSagi Grimberg char *ddgst = (char *)&queue->recv_ddgst; 7773f2304f8SSagi Grimberg size_t recv_len = min_t(size_t, *len, queue->ddgst_remaining); 7783f2304f8SSagi Grimberg off_t off = NVME_TCP_DIGEST_LENGTH - queue->ddgst_remaining; 7793f2304f8SSagi Grimberg int ret; 7803f2304f8SSagi Grimberg 7813f2304f8SSagi Grimberg ret = skb_copy_bits(skb, *offset, &ddgst[off], recv_len); 7823f2304f8SSagi Grimberg if (unlikely(ret)) 7833f2304f8SSagi Grimberg return ret; 7843f2304f8SSagi Grimberg 7853f2304f8SSagi Grimberg queue->ddgst_remaining -= recv_len; 7863f2304f8SSagi Grimberg *offset += recv_len; 7873f2304f8SSagi Grimberg *len -= recv_len; 7883f2304f8SSagi Grimberg if (queue->ddgst_remaining) 7893f2304f8SSagi Grimberg return 0; 7903f2304f8SSagi Grimberg 7913f2304f8SSagi Grimberg if (queue->recv_ddgst != queue->exp_ddgst) { 7923f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7933f2304f8SSagi Grimberg "data digest error: recv %#x expected %#x\n", 7943f2304f8SSagi Grimberg le32_to_cpu(queue->recv_ddgst), 7953f2304f8SSagi Grimberg le32_to_cpu(queue->exp_ddgst)); 7963f2304f8SSagi Grimberg return -EIO; 7973f2304f8SSagi Grimberg } 7983f2304f8SSagi Grimberg 799602d674cSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) { 800602d674cSSagi Grimberg struct request *rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), 801602d674cSSagi Grimberg pdu->command_id); 802602d674cSSagi Grimberg 803602d674cSSagi Grimberg nvme_tcp_end_request(rq, NVME_SC_SUCCESS); 8041a9460ceSSagi Grimberg queue->nr_cqe++; 805602d674cSSagi Grimberg } 806602d674cSSagi Grimberg 8073f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 8083f2304f8SSagi Grimberg return 0; 8093f2304f8SSagi Grimberg } 8103f2304f8SSagi Grimberg 8113f2304f8SSagi Grimberg static int nvme_tcp_recv_skb(read_descriptor_t *desc, struct sk_buff *skb, 8123f2304f8SSagi Grimberg unsigned int offset, size_t len) 8133f2304f8SSagi Grimberg { 8143f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = desc->arg.data; 8153f2304f8SSagi Grimberg size_t consumed = len; 8163f2304f8SSagi Grimberg int result; 8173f2304f8SSagi Grimberg 8183f2304f8SSagi Grimberg while (len) { 8193f2304f8SSagi Grimberg switch (nvme_tcp_recv_state(queue)) { 8203f2304f8SSagi Grimberg case NVME_TCP_RECV_PDU: 8213f2304f8SSagi Grimberg result = nvme_tcp_recv_pdu(queue, skb, &offset, &len); 8223f2304f8SSagi Grimberg break; 8233f2304f8SSagi Grimberg case NVME_TCP_RECV_DATA: 8243f2304f8SSagi Grimberg result = nvme_tcp_recv_data(queue, skb, &offset, &len); 8253f2304f8SSagi Grimberg break; 8263f2304f8SSagi Grimberg case NVME_TCP_RECV_DDGST: 8273f2304f8SSagi Grimberg result = nvme_tcp_recv_ddgst(queue, skb, &offset, &len); 8283f2304f8SSagi Grimberg break; 8293f2304f8SSagi Grimberg default: 8303f2304f8SSagi Grimberg result = -EFAULT; 8313f2304f8SSagi Grimberg } 8323f2304f8SSagi Grimberg if (result) { 8333f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 8343f2304f8SSagi Grimberg "receive failed: %d\n", result); 8353f2304f8SSagi Grimberg queue->rd_enabled = false; 8363f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 8373f2304f8SSagi Grimberg return result; 8383f2304f8SSagi Grimberg } 8393f2304f8SSagi Grimberg } 8403f2304f8SSagi Grimberg 8413f2304f8SSagi Grimberg return consumed; 8423f2304f8SSagi Grimberg } 8433f2304f8SSagi Grimberg 8443f2304f8SSagi Grimberg static void nvme_tcp_data_ready(struct sock *sk) 8453f2304f8SSagi Grimberg { 8463f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8473f2304f8SSagi Grimberg 848386e5e6eSSagi Grimberg read_lock_bh(&sk->sk_callback_lock); 8493f2304f8SSagi Grimberg queue = sk->sk_user_data; 85072e5d757SSagi Grimberg if (likely(queue && queue->rd_enabled) && 85172e5d757SSagi Grimberg !test_bit(NVME_TCP_Q_POLLING, &queue->flags)) 8523f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 853386e5e6eSSagi Grimberg read_unlock_bh(&sk->sk_callback_lock); 8543f2304f8SSagi Grimberg } 8553f2304f8SSagi Grimberg 8563f2304f8SSagi Grimberg static void nvme_tcp_write_space(struct sock *sk) 8573f2304f8SSagi Grimberg { 8583f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8593f2304f8SSagi Grimberg 8603f2304f8SSagi Grimberg read_lock_bh(&sk->sk_callback_lock); 8613f2304f8SSagi Grimberg queue = sk->sk_user_data; 8623f2304f8SSagi Grimberg if (likely(queue && sk_stream_is_writeable(sk))) { 8633f2304f8SSagi Grimberg clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); 8643f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 8653f2304f8SSagi Grimberg } 8663f2304f8SSagi Grimberg read_unlock_bh(&sk->sk_callback_lock); 8673f2304f8SSagi Grimberg } 8683f2304f8SSagi Grimberg 8693f2304f8SSagi Grimberg static void nvme_tcp_state_change(struct sock *sk) 8703f2304f8SSagi Grimberg { 8713f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8723f2304f8SSagi Grimberg 8738b73b45dSSagi Grimberg read_lock_bh(&sk->sk_callback_lock); 8743f2304f8SSagi Grimberg queue = sk->sk_user_data; 8753f2304f8SSagi Grimberg if (!queue) 8763f2304f8SSagi Grimberg goto done; 8773f2304f8SSagi Grimberg 8783f2304f8SSagi Grimberg switch (sk->sk_state) { 8793f2304f8SSagi Grimberg case TCP_CLOSE: 8803f2304f8SSagi Grimberg case TCP_CLOSE_WAIT: 8813f2304f8SSagi Grimberg case TCP_LAST_ACK: 8823f2304f8SSagi Grimberg case TCP_FIN_WAIT1: 8833f2304f8SSagi Grimberg case TCP_FIN_WAIT2: 8843f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 8853f2304f8SSagi Grimberg break; 8863f2304f8SSagi Grimberg default: 8873f2304f8SSagi Grimberg dev_info(queue->ctrl->ctrl.device, 8883f2304f8SSagi Grimberg "queue %d socket state %d\n", 8893f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), sk->sk_state); 8903f2304f8SSagi Grimberg } 8913f2304f8SSagi Grimberg 8923f2304f8SSagi Grimberg queue->state_change(sk); 8933f2304f8SSagi Grimberg done: 8948b73b45dSSagi Grimberg read_unlock_bh(&sk->sk_callback_lock); 8953f2304f8SSagi Grimberg } 8963f2304f8SSagi Grimberg 897122e5b9fSSagi Grimberg static inline bool nvme_tcp_queue_more(struct nvme_tcp_queue *queue) 898122e5b9fSSagi Grimberg { 899122e5b9fSSagi Grimberg return !list_empty(&queue->send_list) || 900122e5b9fSSagi Grimberg !llist_empty(&queue->req_list) || queue->more_requests; 901122e5b9fSSagi Grimberg } 902122e5b9fSSagi Grimberg 9033f2304f8SSagi Grimberg static inline void nvme_tcp_done_send_req(struct nvme_tcp_queue *queue) 9043f2304f8SSagi Grimberg { 9053f2304f8SSagi Grimberg queue->request = NULL; 9063f2304f8SSagi Grimberg } 9073f2304f8SSagi Grimberg 9083f2304f8SSagi Grimberg static void nvme_tcp_fail_request(struct nvme_tcp_request *req) 9093f2304f8SSagi Grimberg { 91016686010SSagi Grimberg nvme_tcp_end_request(blk_mq_rq_from_pdu(req), NVME_SC_HOST_PATH_ERROR); 9113f2304f8SSagi Grimberg } 9123f2304f8SSagi Grimberg 9133f2304f8SSagi Grimberg static int nvme_tcp_try_send_data(struct nvme_tcp_request *req) 9143f2304f8SSagi Grimberg { 9153f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9163f2304f8SSagi Grimberg 9173f2304f8SSagi Grimberg while (true) { 9183f2304f8SSagi Grimberg struct page *page = nvme_tcp_req_cur_page(req); 9193f2304f8SSagi Grimberg size_t offset = nvme_tcp_req_cur_offset(req); 9203f2304f8SSagi Grimberg size_t len = nvme_tcp_req_cur_length(req); 9213f2304f8SSagi Grimberg bool last = nvme_tcp_pdu_last_send(req, len); 9223f2304f8SSagi Grimberg int ret, flags = MSG_DONTWAIT; 9233f2304f8SSagi Grimberg 924122e5b9fSSagi Grimberg if (last && !queue->data_digest && !nvme_tcp_queue_more(queue)) 9253f2304f8SSagi Grimberg flags |= MSG_EOR; 9263f2304f8SSagi Grimberg else 9275bb052d7SSagi Grimberg flags |= MSG_MORE | MSG_SENDPAGE_NOTLAST; 9283f2304f8SSagi Grimberg 9297d4194abSColy Li if (sendpage_ok(page)) { 9307d4194abSColy Li ret = kernel_sendpage(queue->sock, page, offset, len, 93137c15219SMikhail Skorzhinskii flags); 93237c15219SMikhail Skorzhinskii } else { 9337d4194abSColy Li ret = sock_no_sendpage(queue->sock, page, offset, len, 93437c15219SMikhail Skorzhinskii flags); 93537c15219SMikhail Skorzhinskii } 9363f2304f8SSagi Grimberg if (ret <= 0) 9373f2304f8SSagi Grimberg return ret; 9383f2304f8SSagi Grimberg 9393f2304f8SSagi Grimberg nvme_tcp_advance_req(req, ret); 9403f2304f8SSagi Grimberg if (queue->data_digest) 9413f2304f8SSagi Grimberg nvme_tcp_ddgst_update(queue->snd_hash, page, 9423f2304f8SSagi Grimberg offset, ret); 9433f2304f8SSagi Grimberg 9443f2304f8SSagi Grimberg /* fully successful last write*/ 9453f2304f8SSagi Grimberg if (last && ret == len) { 9463f2304f8SSagi Grimberg if (queue->data_digest) { 9473f2304f8SSagi Grimberg nvme_tcp_ddgst_final(queue->snd_hash, 9483f2304f8SSagi Grimberg &req->ddgst); 9493f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DDGST; 9503f2304f8SSagi Grimberg req->offset = 0; 9513f2304f8SSagi Grimberg } else { 9523f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 9533f2304f8SSagi Grimberg } 9543f2304f8SSagi Grimberg return 1; 9553f2304f8SSagi Grimberg } 9563f2304f8SSagi Grimberg } 9573f2304f8SSagi Grimberg return -EAGAIN; 9583f2304f8SSagi Grimberg } 9593f2304f8SSagi Grimberg 9603f2304f8SSagi Grimberg static int nvme_tcp_try_send_cmd_pdu(struct nvme_tcp_request *req) 9613f2304f8SSagi Grimberg { 9623f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9633f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 9643f2304f8SSagi Grimberg bool inline_data = nvme_tcp_has_inline_data(req); 9653f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 9663f2304f8SSagi Grimberg int len = sizeof(*pdu) + hdgst - req->offset; 9675bb052d7SSagi Grimberg int flags = MSG_DONTWAIT; 9683f2304f8SSagi Grimberg int ret; 9693f2304f8SSagi Grimberg 970122e5b9fSSagi Grimberg if (inline_data || nvme_tcp_queue_more(queue)) 9715bb052d7SSagi Grimberg flags |= MSG_MORE | MSG_SENDPAGE_NOTLAST; 9725bb052d7SSagi Grimberg else 9735bb052d7SSagi Grimberg flags |= MSG_EOR; 9745bb052d7SSagi Grimberg 9753f2304f8SSagi Grimberg if (queue->hdr_digest && !req->offset) 9763f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->snd_hash, pdu, sizeof(*pdu)); 9773f2304f8SSagi Grimberg 9783f2304f8SSagi Grimberg ret = kernel_sendpage(queue->sock, virt_to_page(pdu), 9793f2304f8SSagi Grimberg offset_in_page(pdu) + req->offset, len, flags); 9803f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 9813f2304f8SSagi Grimberg return ret; 9823f2304f8SSagi Grimberg 9833f2304f8SSagi Grimberg len -= ret; 9843f2304f8SSagi Grimberg if (!len) { 9853f2304f8SSagi Grimberg if (inline_data) { 9863f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DATA; 9873f2304f8SSagi Grimberg if (queue->data_digest) 9883f2304f8SSagi Grimberg crypto_ahash_init(queue->snd_hash); 9893f2304f8SSagi Grimberg } else { 9903f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 9913f2304f8SSagi Grimberg } 9923f2304f8SSagi Grimberg return 1; 9933f2304f8SSagi Grimberg } 9943f2304f8SSagi Grimberg req->offset += ret; 9953f2304f8SSagi Grimberg 9963f2304f8SSagi Grimberg return -EAGAIN; 9973f2304f8SSagi Grimberg } 9983f2304f8SSagi Grimberg 9993f2304f8SSagi Grimberg static int nvme_tcp_try_send_data_pdu(struct nvme_tcp_request *req) 10003f2304f8SSagi Grimberg { 10013f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 10023f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu = req->pdu; 10033f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 10043f2304f8SSagi Grimberg int len = sizeof(*pdu) - req->offset + hdgst; 10053f2304f8SSagi Grimberg int ret; 10063f2304f8SSagi Grimberg 10073f2304f8SSagi Grimberg if (queue->hdr_digest && !req->offset) 10083f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->snd_hash, pdu, sizeof(*pdu)); 10093f2304f8SSagi Grimberg 10103f2304f8SSagi Grimberg ret = kernel_sendpage(queue->sock, virt_to_page(pdu), 10113f2304f8SSagi Grimberg offset_in_page(pdu) + req->offset, len, 10125bb052d7SSagi Grimberg MSG_DONTWAIT | MSG_MORE | MSG_SENDPAGE_NOTLAST); 10133f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 10143f2304f8SSagi Grimberg return ret; 10153f2304f8SSagi Grimberg 10163f2304f8SSagi Grimberg len -= ret; 10173f2304f8SSagi Grimberg if (!len) { 10183f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DATA; 10193f2304f8SSagi Grimberg if (queue->data_digest) 10203f2304f8SSagi Grimberg crypto_ahash_init(queue->snd_hash); 10213f2304f8SSagi Grimberg return 1; 10223f2304f8SSagi Grimberg } 10233f2304f8SSagi Grimberg req->offset += ret; 10243f2304f8SSagi Grimberg 10253f2304f8SSagi Grimberg return -EAGAIN; 10263f2304f8SSagi Grimberg } 10273f2304f8SSagi Grimberg 10283f2304f8SSagi Grimberg static int nvme_tcp_try_send_ddgst(struct nvme_tcp_request *req) 10293f2304f8SSagi Grimberg { 10303f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 10313f2304f8SSagi Grimberg int ret; 1032122e5b9fSSagi Grimberg struct msghdr msg = { .msg_flags = MSG_DONTWAIT }; 10333f2304f8SSagi Grimberg struct kvec iov = { 10343f2304f8SSagi Grimberg .iov_base = &req->ddgst + req->offset, 10353f2304f8SSagi Grimberg .iov_len = NVME_TCP_DIGEST_LENGTH - req->offset 10363f2304f8SSagi Grimberg }; 10373f2304f8SSagi Grimberg 1038122e5b9fSSagi Grimberg if (nvme_tcp_queue_more(queue)) 1039122e5b9fSSagi Grimberg msg.msg_flags |= MSG_MORE; 1040122e5b9fSSagi Grimberg else 1041122e5b9fSSagi Grimberg msg.msg_flags |= MSG_EOR; 1042122e5b9fSSagi Grimberg 10433f2304f8SSagi Grimberg ret = kernel_sendmsg(queue->sock, &msg, &iov, 1, iov.iov_len); 10443f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 10453f2304f8SSagi Grimberg return ret; 10463f2304f8SSagi Grimberg 10473f2304f8SSagi Grimberg if (req->offset + ret == NVME_TCP_DIGEST_LENGTH) { 10483f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 10493f2304f8SSagi Grimberg return 1; 10503f2304f8SSagi Grimberg } 10513f2304f8SSagi Grimberg 10523f2304f8SSagi Grimberg req->offset += ret; 10533f2304f8SSagi Grimberg return -EAGAIN; 10543f2304f8SSagi Grimberg } 10553f2304f8SSagi Grimberg 10563f2304f8SSagi Grimberg static int nvme_tcp_try_send(struct nvme_tcp_queue *queue) 10573f2304f8SSagi Grimberg { 10583f2304f8SSagi Grimberg struct nvme_tcp_request *req; 10593f2304f8SSagi Grimberg int ret = 1; 10603f2304f8SSagi Grimberg 10613f2304f8SSagi Grimberg if (!queue->request) { 10623f2304f8SSagi Grimberg queue->request = nvme_tcp_fetch_request(queue); 10633f2304f8SSagi Grimberg if (!queue->request) 10643f2304f8SSagi Grimberg return 0; 10653f2304f8SSagi Grimberg } 10663f2304f8SSagi Grimberg req = queue->request; 10673f2304f8SSagi Grimberg 10683f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_CMD_PDU) { 10693f2304f8SSagi Grimberg ret = nvme_tcp_try_send_cmd_pdu(req); 10703f2304f8SSagi Grimberg if (ret <= 0) 10713f2304f8SSagi Grimberg goto done; 10723f2304f8SSagi Grimberg if (!nvme_tcp_has_inline_data(req)) 10733f2304f8SSagi Grimberg return ret; 10743f2304f8SSagi Grimberg } 10753f2304f8SSagi Grimberg 10763f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_H2C_PDU) { 10773f2304f8SSagi Grimberg ret = nvme_tcp_try_send_data_pdu(req); 10783f2304f8SSagi Grimberg if (ret <= 0) 10793f2304f8SSagi Grimberg goto done; 10803f2304f8SSagi Grimberg } 10813f2304f8SSagi Grimberg 10823f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_DATA) { 10833f2304f8SSagi Grimberg ret = nvme_tcp_try_send_data(req); 10843f2304f8SSagi Grimberg if (ret <= 0) 10853f2304f8SSagi Grimberg goto done; 10863f2304f8SSagi Grimberg } 10873f2304f8SSagi Grimberg 10883f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_DDGST) 10893f2304f8SSagi Grimberg ret = nvme_tcp_try_send_ddgst(req); 10903f2304f8SSagi Grimberg done: 10915ff4e112SSagi Grimberg if (ret == -EAGAIN) { 10923f2304f8SSagi Grimberg ret = 0; 10935ff4e112SSagi Grimberg } else if (ret < 0) { 10945ff4e112SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 10955ff4e112SSagi Grimberg "failed to send request %d\n", ret); 10965ff4e112SSagi Grimberg if (ret != -EPIPE && ret != -ECONNRESET) 10975ff4e112SSagi Grimberg nvme_tcp_fail_request(queue->request); 10985ff4e112SSagi Grimberg nvme_tcp_done_send_req(queue); 10995ff4e112SSagi Grimberg } 11003f2304f8SSagi Grimberg return ret; 11013f2304f8SSagi Grimberg } 11023f2304f8SSagi Grimberg 11033f2304f8SSagi Grimberg static int nvme_tcp_try_recv(struct nvme_tcp_queue *queue) 11043f2304f8SSagi Grimberg { 110510407ec9SPotnuri Bharat Teja struct socket *sock = queue->sock; 110610407ec9SPotnuri Bharat Teja struct sock *sk = sock->sk; 11073f2304f8SSagi Grimberg read_descriptor_t rd_desc; 11083f2304f8SSagi Grimberg int consumed; 11093f2304f8SSagi Grimberg 11103f2304f8SSagi Grimberg rd_desc.arg.data = queue; 11113f2304f8SSagi Grimberg rd_desc.count = 1; 11123f2304f8SSagi Grimberg lock_sock(sk); 11131a9460ceSSagi Grimberg queue->nr_cqe = 0; 111410407ec9SPotnuri Bharat Teja consumed = sock->ops->read_sock(sk, &rd_desc, nvme_tcp_recv_skb); 11153f2304f8SSagi Grimberg release_sock(sk); 11163f2304f8SSagi Grimberg return consumed; 11173f2304f8SSagi Grimberg } 11183f2304f8SSagi Grimberg 11193f2304f8SSagi Grimberg static void nvme_tcp_io_work(struct work_struct *w) 11203f2304f8SSagi Grimberg { 11213f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = 11223f2304f8SSagi Grimberg container_of(w, struct nvme_tcp_queue, io_work); 1123ddef2957SWunderlich, Mark unsigned long deadline = jiffies + msecs_to_jiffies(1); 11243f2304f8SSagi Grimberg 11253f2304f8SSagi Grimberg do { 11263f2304f8SSagi Grimberg bool pending = false; 11273f2304f8SSagi Grimberg int result; 11283f2304f8SSagi Grimberg 1129db5ad6b7SSagi Grimberg if (mutex_trylock(&queue->send_mutex)) { 11303f2304f8SSagi Grimberg result = nvme_tcp_try_send(queue); 1131db5ad6b7SSagi Grimberg mutex_unlock(&queue->send_mutex); 11325ff4e112SSagi Grimberg if (result > 0) 11333f2304f8SSagi Grimberg pending = true; 11345ff4e112SSagi Grimberg else if (unlikely(result < 0)) 11355ff4e112SSagi Grimberg break; 1136db5ad6b7SSagi Grimberg } 11373f2304f8SSagi Grimberg 11383f2304f8SSagi Grimberg result = nvme_tcp_try_recv(queue); 11393f2304f8SSagi Grimberg if (result > 0) 11403f2304f8SSagi Grimberg pending = true; 1141761ad26cSSagi Grimberg else if (unlikely(result < 0)) 114239d06079SSagi Grimberg return; 11433f2304f8SSagi Grimberg 11443f2304f8SSagi Grimberg if (!pending) 11453f2304f8SSagi Grimberg return; 11463f2304f8SSagi Grimberg 1147ddef2957SWunderlich, Mark } while (!time_after(jiffies, deadline)); /* quota is exhausted */ 11483f2304f8SSagi Grimberg 11493f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 11503f2304f8SSagi Grimberg } 11513f2304f8SSagi Grimberg 11523f2304f8SSagi Grimberg static void nvme_tcp_free_crypto(struct nvme_tcp_queue *queue) 11533f2304f8SSagi Grimberg { 11543f2304f8SSagi Grimberg struct crypto_ahash *tfm = crypto_ahash_reqtfm(queue->rcv_hash); 11553f2304f8SSagi Grimberg 11563f2304f8SSagi Grimberg ahash_request_free(queue->rcv_hash); 11573f2304f8SSagi Grimberg ahash_request_free(queue->snd_hash); 11583f2304f8SSagi Grimberg crypto_free_ahash(tfm); 11593f2304f8SSagi Grimberg } 11603f2304f8SSagi Grimberg 11613f2304f8SSagi Grimberg static int nvme_tcp_alloc_crypto(struct nvme_tcp_queue *queue) 11623f2304f8SSagi Grimberg { 11633f2304f8SSagi Grimberg struct crypto_ahash *tfm; 11643f2304f8SSagi Grimberg 11653f2304f8SSagi Grimberg tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); 11663f2304f8SSagi Grimberg if (IS_ERR(tfm)) 11673f2304f8SSagi Grimberg return PTR_ERR(tfm); 11683f2304f8SSagi Grimberg 11693f2304f8SSagi Grimberg queue->snd_hash = ahash_request_alloc(tfm, GFP_KERNEL); 11703f2304f8SSagi Grimberg if (!queue->snd_hash) 11713f2304f8SSagi Grimberg goto free_tfm; 11723f2304f8SSagi Grimberg ahash_request_set_callback(queue->snd_hash, 0, NULL, NULL); 11733f2304f8SSagi Grimberg 11743f2304f8SSagi Grimberg queue->rcv_hash = ahash_request_alloc(tfm, GFP_KERNEL); 11753f2304f8SSagi Grimberg if (!queue->rcv_hash) 11763f2304f8SSagi Grimberg goto free_snd_hash; 11773f2304f8SSagi Grimberg ahash_request_set_callback(queue->rcv_hash, 0, NULL, NULL); 11783f2304f8SSagi Grimberg 11793f2304f8SSagi Grimberg return 0; 11803f2304f8SSagi Grimberg free_snd_hash: 11813f2304f8SSagi Grimberg ahash_request_free(queue->snd_hash); 11823f2304f8SSagi Grimberg free_tfm: 11833f2304f8SSagi Grimberg crypto_free_ahash(tfm); 11843f2304f8SSagi Grimberg return -ENOMEM; 11853f2304f8SSagi Grimberg } 11863f2304f8SSagi Grimberg 11873f2304f8SSagi Grimberg static void nvme_tcp_free_async_req(struct nvme_tcp_ctrl *ctrl) 11883f2304f8SSagi Grimberg { 11893f2304f8SSagi Grimberg struct nvme_tcp_request *async = &ctrl->async_req; 11903f2304f8SSagi Grimberg 11913f2304f8SSagi Grimberg page_frag_free(async->pdu); 11923f2304f8SSagi Grimberg } 11933f2304f8SSagi Grimberg 11943f2304f8SSagi Grimberg static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl) 11953f2304f8SSagi Grimberg { 11963f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 11973f2304f8SSagi Grimberg struct nvme_tcp_request *async = &ctrl->async_req; 11983f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 11993f2304f8SSagi Grimberg 12003f2304f8SSagi Grimberg async->pdu = page_frag_alloc(&queue->pf_cache, 12013f2304f8SSagi Grimberg sizeof(struct nvme_tcp_cmd_pdu) + hdgst, 12023f2304f8SSagi Grimberg GFP_KERNEL | __GFP_ZERO); 12033f2304f8SSagi Grimberg if (!async->pdu) 12043f2304f8SSagi Grimberg return -ENOMEM; 12053f2304f8SSagi Grimberg 12063f2304f8SSagi Grimberg async->queue = &ctrl->queues[0]; 12073f2304f8SSagi Grimberg return 0; 12083f2304f8SSagi Grimberg } 12093f2304f8SSagi Grimberg 12103f2304f8SSagi Grimberg static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid) 12113f2304f8SSagi Grimberg { 12123f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 12133f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 12143f2304f8SSagi Grimberg 12153f2304f8SSagi Grimberg if (!test_and_clear_bit(NVME_TCP_Q_ALLOCATED, &queue->flags)) 12163f2304f8SSagi Grimberg return; 12173f2304f8SSagi Grimberg 12183f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) 12193f2304f8SSagi Grimberg nvme_tcp_free_crypto(queue); 12203f2304f8SSagi Grimberg 12213f2304f8SSagi Grimberg sock_release(queue->sock); 12223f2304f8SSagi Grimberg kfree(queue->pdu); 12239ebbfe49SChao Leng mutex_destroy(&queue->queue_lock); 12243f2304f8SSagi Grimberg } 12253f2304f8SSagi Grimberg 12263f2304f8SSagi Grimberg static int nvme_tcp_init_connection(struct nvme_tcp_queue *queue) 12273f2304f8SSagi Grimberg { 12283f2304f8SSagi Grimberg struct nvme_tcp_icreq_pdu *icreq; 12293f2304f8SSagi Grimberg struct nvme_tcp_icresp_pdu *icresp; 12303f2304f8SSagi Grimberg struct msghdr msg = {}; 12313f2304f8SSagi Grimberg struct kvec iov; 12323f2304f8SSagi Grimberg bool ctrl_hdgst, ctrl_ddgst; 12333f2304f8SSagi Grimberg int ret; 12343f2304f8SSagi Grimberg 12353f2304f8SSagi Grimberg icreq = kzalloc(sizeof(*icreq), GFP_KERNEL); 12363f2304f8SSagi Grimberg if (!icreq) 12373f2304f8SSagi Grimberg return -ENOMEM; 12383f2304f8SSagi Grimberg 12393f2304f8SSagi Grimberg icresp = kzalloc(sizeof(*icresp), GFP_KERNEL); 12403f2304f8SSagi Grimberg if (!icresp) { 12413f2304f8SSagi Grimberg ret = -ENOMEM; 12423f2304f8SSagi Grimberg goto free_icreq; 12433f2304f8SSagi Grimberg } 12443f2304f8SSagi Grimberg 12453f2304f8SSagi Grimberg icreq->hdr.type = nvme_tcp_icreq; 12463f2304f8SSagi Grimberg icreq->hdr.hlen = sizeof(*icreq); 12473f2304f8SSagi Grimberg icreq->hdr.pdo = 0; 12483f2304f8SSagi Grimberg icreq->hdr.plen = cpu_to_le32(icreq->hdr.hlen); 12493f2304f8SSagi Grimberg icreq->pfv = cpu_to_le16(NVME_TCP_PFV_1_0); 12503f2304f8SSagi Grimberg icreq->maxr2t = 0; /* single inflight r2t supported */ 12513f2304f8SSagi Grimberg icreq->hpda = 0; /* no alignment constraint */ 12523f2304f8SSagi Grimberg if (queue->hdr_digest) 12533f2304f8SSagi Grimberg icreq->digest |= NVME_TCP_HDR_DIGEST_ENABLE; 12543f2304f8SSagi Grimberg if (queue->data_digest) 12553f2304f8SSagi Grimberg icreq->digest |= NVME_TCP_DATA_DIGEST_ENABLE; 12563f2304f8SSagi Grimberg 12573f2304f8SSagi Grimberg iov.iov_base = icreq; 12583f2304f8SSagi Grimberg iov.iov_len = sizeof(*icreq); 12593f2304f8SSagi Grimberg ret = kernel_sendmsg(queue->sock, &msg, &iov, 1, iov.iov_len); 12603f2304f8SSagi Grimberg if (ret < 0) 12613f2304f8SSagi Grimberg goto free_icresp; 12623f2304f8SSagi Grimberg 12633f2304f8SSagi Grimberg memset(&msg, 0, sizeof(msg)); 12643f2304f8SSagi Grimberg iov.iov_base = icresp; 12653f2304f8SSagi Grimberg iov.iov_len = sizeof(*icresp); 12663f2304f8SSagi Grimberg ret = kernel_recvmsg(queue->sock, &msg, &iov, 1, 12673f2304f8SSagi Grimberg iov.iov_len, msg.msg_flags); 12683f2304f8SSagi Grimberg if (ret < 0) 12693f2304f8SSagi Grimberg goto free_icresp; 12703f2304f8SSagi Grimberg 12713f2304f8SSagi Grimberg ret = -EINVAL; 12723f2304f8SSagi Grimberg if (icresp->hdr.type != nvme_tcp_icresp) { 12733f2304f8SSagi Grimberg pr_err("queue %d: bad type returned %d\n", 12743f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->hdr.type); 12753f2304f8SSagi Grimberg goto free_icresp; 12763f2304f8SSagi Grimberg } 12773f2304f8SSagi Grimberg 12783f2304f8SSagi Grimberg if (le32_to_cpu(icresp->hdr.plen) != sizeof(*icresp)) { 12793f2304f8SSagi Grimberg pr_err("queue %d: bad pdu length returned %d\n", 12803f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->hdr.plen); 12813f2304f8SSagi Grimberg goto free_icresp; 12823f2304f8SSagi Grimberg } 12833f2304f8SSagi Grimberg 12843f2304f8SSagi Grimberg if (icresp->pfv != NVME_TCP_PFV_1_0) { 12853f2304f8SSagi Grimberg pr_err("queue %d: bad pfv returned %d\n", 12863f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->pfv); 12873f2304f8SSagi Grimberg goto free_icresp; 12883f2304f8SSagi Grimberg } 12893f2304f8SSagi Grimberg 12903f2304f8SSagi Grimberg ctrl_ddgst = !!(icresp->digest & NVME_TCP_DATA_DIGEST_ENABLE); 12913f2304f8SSagi Grimberg if ((queue->data_digest && !ctrl_ddgst) || 12923f2304f8SSagi Grimberg (!queue->data_digest && ctrl_ddgst)) { 12933f2304f8SSagi Grimberg pr_err("queue %d: data digest mismatch host: %s ctrl: %s\n", 12943f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), 12953f2304f8SSagi Grimberg queue->data_digest ? "enabled" : "disabled", 12963f2304f8SSagi Grimberg ctrl_ddgst ? "enabled" : "disabled"); 12973f2304f8SSagi Grimberg goto free_icresp; 12983f2304f8SSagi Grimberg } 12993f2304f8SSagi Grimberg 13003f2304f8SSagi Grimberg ctrl_hdgst = !!(icresp->digest & NVME_TCP_HDR_DIGEST_ENABLE); 13013f2304f8SSagi Grimberg if ((queue->hdr_digest && !ctrl_hdgst) || 13023f2304f8SSagi Grimberg (!queue->hdr_digest && ctrl_hdgst)) { 13033f2304f8SSagi Grimberg pr_err("queue %d: header digest mismatch host: %s ctrl: %s\n", 13043f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), 13053f2304f8SSagi Grimberg queue->hdr_digest ? "enabled" : "disabled", 13063f2304f8SSagi Grimberg ctrl_hdgst ? "enabled" : "disabled"); 13073f2304f8SSagi Grimberg goto free_icresp; 13083f2304f8SSagi Grimberg } 13093f2304f8SSagi Grimberg 13103f2304f8SSagi Grimberg if (icresp->cpda != 0) { 13113f2304f8SSagi Grimberg pr_err("queue %d: unsupported cpda returned %d\n", 13123f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->cpda); 13133f2304f8SSagi Grimberg goto free_icresp; 13143f2304f8SSagi Grimberg } 13153f2304f8SSagi Grimberg 13163f2304f8SSagi Grimberg ret = 0; 13173f2304f8SSagi Grimberg free_icresp: 13183f2304f8SSagi Grimberg kfree(icresp); 13193f2304f8SSagi Grimberg free_icreq: 13203f2304f8SSagi Grimberg kfree(icreq); 13213f2304f8SSagi Grimberg return ret; 13223f2304f8SSagi Grimberg } 13233f2304f8SSagi Grimberg 132440510a63SSagi Grimberg static bool nvme_tcp_admin_queue(struct nvme_tcp_queue *queue) 132540510a63SSagi Grimberg { 132640510a63SSagi Grimberg return nvme_tcp_queue_id(queue) == 0; 132740510a63SSagi Grimberg } 132840510a63SSagi Grimberg 132940510a63SSagi Grimberg static bool nvme_tcp_default_queue(struct nvme_tcp_queue *queue) 133040510a63SSagi Grimberg { 133140510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 133240510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 133340510a63SSagi Grimberg 133440510a63SSagi Grimberg return !nvme_tcp_admin_queue(queue) && 133540510a63SSagi Grimberg qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT]; 133640510a63SSagi Grimberg } 133740510a63SSagi Grimberg 133840510a63SSagi Grimberg static bool nvme_tcp_read_queue(struct nvme_tcp_queue *queue) 133940510a63SSagi Grimberg { 134040510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 134140510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 134240510a63SSagi Grimberg 134340510a63SSagi Grimberg return !nvme_tcp_admin_queue(queue) && 134440510a63SSagi Grimberg !nvme_tcp_default_queue(queue) && 134540510a63SSagi Grimberg qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT] + 134640510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 134740510a63SSagi Grimberg } 134840510a63SSagi Grimberg 134940510a63SSagi Grimberg static bool nvme_tcp_poll_queue(struct nvme_tcp_queue *queue) 135040510a63SSagi Grimberg { 135140510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 135240510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 135340510a63SSagi Grimberg 135440510a63SSagi Grimberg return !nvme_tcp_admin_queue(queue) && 135540510a63SSagi Grimberg !nvme_tcp_default_queue(queue) && 135640510a63SSagi Grimberg !nvme_tcp_read_queue(queue) && 135740510a63SSagi Grimberg qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT] + 135840510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] + 135940510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL]; 136040510a63SSagi Grimberg } 136140510a63SSagi Grimberg 136240510a63SSagi Grimberg static void nvme_tcp_set_queue_io_cpu(struct nvme_tcp_queue *queue) 136340510a63SSagi Grimberg { 136440510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 136540510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 136640510a63SSagi Grimberg int n = 0; 136740510a63SSagi Grimberg 136840510a63SSagi Grimberg if (nvme_tcp_default_queue(queue)) 136940510a63SSagi Grimberg n = qid - 1; 137040510a63SSagi Grimberg else if (nvme_tcp_read_queue(queue)) 137140510a63SSagi Grimberg n = qid - ctrl->io_queues[HCTX_TYPE_DEFAULT] - 1; 137240510a63SSagi Grimberg else if (nvme_tcp_poll_queue(queue)) 137340510a63SSagi Grimberg n = qid - ctrl->io_queues[HCTX_TYPE_DEFAULT] - 137440510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] - 1; 137540510a63SSagi Grimberg queue->io_cpu = cpumask_next_wrap(n - 1, cpu_online_mask, -1, false); 137640510a63SSagi Grimberg } 137740510a63SSagi Grimberg 13783f2304f8SSagi Grimberg static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, 13793f2304f8SSagi Grimberg int qid, size_t queue_size) 13803f2304f8SSagi Grimberg { 13813f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 13823f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 13836ebf71baSChristoph Hellwig int ret, rcv_pdu_size; 13843f2304f8SSagi Grimberg 13859ebbfe49SChao Leng mutex_init(&queue->queue_lock); 13863f2304f8SSagi Grimberg queue->ctrl = ctrl; 138715ec928aSSagi Grimberg init_llist_head(&queue->req_list); 13883f2304f8SSagi Grimberg INIT_LIST_HEAD(&queue->send_list); 1389db5ad6b7SSagi Grimberg mutex_init(&queue->send_mutex); 13903f2304f8SSagi Grimberg INIT_WORK(&queue->io_work, nvme_tcp_io_work); 13913f2304f8SSagi Grimberg queue->queue_size = queue_size; 13923f2304f8SSagi Grimberg 13933f2304f8SSagi Grimberg if (qid > 0) 13949924b030SIsrael Rukshin queue->cmnd_capsule_len = nctrl->ioccsz * 16; 13953f2304f8SSagi Grimberg else 13963f2304f8SSagi Grimberg queue->cmnd_capsule_len = sizeof(struct nvme_command) + 13973f2304f8SSagi Grimberg NVME_TCP_ADMIN_CCSZ; 13983f2304f8SSagi Grimberg 13993f2304f8SSagi Grimberg ret = sock_create(ctrl->addr.ss_family, SOCK_STREAM, 14003f2304f8SSagi Grimberg IPPROTO_TCP, &queue->sock); 14013f2304f8SSagi Grimberg if (ret) { 14029924b030SIsrael Rukshin dev_err(nctrl->device, 14033f2304f8SSagi Grimberg "failed to create socket: %d\n", ret); 14049ebbfe49SChao Leng goto err_destroy_mutex; 14053f2304f8SSagi Grimberg } 14063f2304f8SSagi Grimberg 14073f2304f8SSagi Grimberg /* Single syn retry */ 1408557eadfcSChristoph Hellwig tcp_sock_set_syncnt(queue->sock->sk, 1); 14093f2304f8SSagi Grimberg 14103f2304f8SSagi Grimberg /* Set TCP no delay */ 141112abc5eeSChristoph Hellwig tcp_sock_set_nodelay(queue->sock->sk); 14123f2304f8SSagi Grimberg 14133f2304f8SSagi Grimberg /* 14143f2304f8SSagi Grimberg * Cleanup whatever is sitting in the TCP transmit queue on socket 14153f2304f8SSagi Grimberg * close. This is done to prevent stale data from being sent should 14163f2304f8SSagi Grimberg * the network connection be restored before TCP times out. 14173f2304f8SSagi Grimberg */ 1418c433594cSChristoph Hellwig sock_no_linger(queue->sock->sk); 14193f2304f8SSagi Grimberg 14206e434967SChristoph Hellwig if (so_priority > 0) 14216e434967SChristoph Hellwig sock_set_priority(queue->sock->sk, so_priority); 14229912ade3SWunderlich, Mark 1423bb13985dSIsrael Rukshin /* Set socket type of service */ 14246ebf71baSChristoph Hellwig if (nctrl->opts->tos >= 0) 14256ebf71baSChristoph Hellwig ip_sock_set_tos(queue->sock->sk, nctrl->opts->tos); 1426bb13985dSIsrael Rukshin 1427adc99fd3SSagi Grimberg /* Set 10 seconds timeout for icresp recvmsg */ 1428adc99fd3SSagi Grimberg queue->sock->sk->sk_rcvtimeo = 10 * HZ; 1429adc99fd3SSagi Grimberg 14303f2304f8SSagi Grimberg queue->sock->sk->sk_allocation = GFP_ATOMIC; 143140510a63SSagi Grimberg nvme_tcp_set_queue_io_cpu(queue); 14323f2304f8SSagi Grimberg queue->request = NULL; 14333f2304f8SSagi Grimberg queue->data_remaining = 0; 14343f2304f8SSagi Grimberg queue->ddgst_remaining = 0; 14353f2304f8SSagi Grimberg queue->pdu_remaining = 0; 14363f2304f8SSagi Grimberg queue->pdu_offset = 0; 14373f2304f8SSagi Grimberg sk_set_memalloc(queue->sock->sk); 14383f2304f8SSagi Grimberg 14399924b030SIsrael Rukshin if (nctrl->opts->mask & NVMF_OPT_HOST_TRADDR) { 14403f2304f8SSagi Grimberg ret = kernel_bind(queue->sock, (struct sockaddr *)&ctrl->src_addr, 14413f2304f8SSagi Grimberg sizeof(ctrl->src_addr)); 14423f2304f8SSagi Grimberg if (ret) { 14439924b030SIsrael Rukshin dev_err(nctrl->device, 14443f2304f8SSagi Grimberg "failed to bind queue %d socket %d\n", 14453f2304f8SSagi Grimberg qid, ret); 14463f2304f8SSagi Grimberg goto err_sock; 14473f2304f8SSagi Grimberg } 14483f2304f8SSagi Grimberg } 14493f2304f8SSagi Grimberg 14503f2304f8SSagi Grimberg queue->hdr_digest = nctrl->opts->hdr_digest; 14513f2304f8SSagi Grimberg queue->data_digest = nctrl->opts->data_digest; 14523f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) { 14533f2304f8SSagi Grimberg ret = nvme_tcp_alloc_crypto(queue); 14543f2304f8SSagi Grimberg if (ret) { 14559924b030SIsrael Rukshin dev_err(nctrl->device, 14563f2304f8SSagi Grimberg "failed to allocate queue %d crypto\n", qid); 14573f2304f8SSagi Grimberg goto err_sock; 14583f2304f8SSagi Grimberg } 14593f2304f8SSagi Grimberg } 14603f2304f8SSagi Grimberg 14613f2304f8SSagi Grimberg rcv_pdu_size = sizeof(struct nvme_tcp_rsp_pdu) + 14623f2304f8SSagi Grimberg nvme_tcp_hdgst_len(queue); 14633f2304f8SSagi Grimberg queue->pdu = kmalloc(rcv_pdu_size, GFP_KERNEL); 14643f2304f8SSagi Grimberg if (!queue->pdu) { 14653f2304f8SSagi Grimberg ret = -ENOMEM; 14663f2304f8SSagi Grimberg goto err_crypto; 14673f2304f8SSagi Grimberg } 14683f2304f8SSagi Grimberg 14699924b030SIsrael Rukshin dev_dbg(nctrl->device, "connecting queue %d\n", 14703f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 14713f2304f8SSagi Grimberg 14723f2304f8SSagi Grimberg ret = kernel_connect(queue->sock, (struct sockaddr *)&ctrl->addr, 14733f2304f8SSagi Grimberg sizeof(ctrl->addr), 0); 14743f2304f8SSagi Grimberg if (ret) { 14759924b030SIsrael Rukshin dev_err(nctrl->device, 14763f2304f8SSagi Grimberg "failed to connect socket: %d\n", ret); 14773f2304f8SSagi Grimberg goto err_rcv_pdu; 14783f2304f8SSagi Grimberg } 14793f2304f8SSagi Grimberg 14803f2304f8SSagi Grimberg ret = nvme_tcp_init_connection(queue); 14813f2304f8SSagi Grimberg if (ret) 14823f2304f8SSagi Grimberg goto err_init_connect; 14833f2304f8SSagi Grimberg 14843f2304f8SSagi Grimberg queue->rd_enabled = true; 14853f2304f8SSagi Grimberg set_bit(NVME_TCP_Q_ALLOCATED, &queue->flags); 14863f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 14873f2304f8SSagi Grimberg 14883f2304f8SSagi Grimberg write_lock_bh(&queue->sock->sk->sk_callback_lock); 14893f2304f8SSagi Grimberg queue->sock->sk->sk_user_data = queue; 14903f2304f8SSagi Grimberg queue->state_change = queue->sock->sk->sk_state_change; 14913f2304f8SSagi Grimberg queue->data_ready = queue->sock->sk->sk_data_ready; 14923f2304f8SSagi Grimberg queue->write_space = queue->sock->sk->sk_write_space; 14933f2304f8SSagi Grimberg queue->sock->sk->sk_data_ready = nvme_tcp_data_ready; 14943f2304f8SSagi Grimberg queue->sock->sk->sk_state_change = nvme_tcp_state_change; 14953f2304f8SSagi Grimberg queue->sock->sk->sk_write_space = nvme_tcp_write_space; 1496ac1c4e18SSebastian Andrzej Siewior #ifdef CONFIG_NET_RX_BUSY_POLL 14971a9460ceSSagi Grimberg queue->sock->sk->sk_ll_usec = 1; 1498ac1c4e18SSebastian Andrzej Siewior #endif 14993f2304f8SSagi Grimberg write_unlock_bh(&queue->sock->sk->sk_callback_lock); 15003f2304f8SSagi Grimberg 15013f2304f8SSagi Grimberg return 0; 15023f2304f8SSagi Grimberg 15033f2304f8SSagi Grimberg err_init_connect: 15043f2304f8SSagi Grimberg kernel_sock_shutdown(queue->sock, SHUT_RDWR); 15053f2304f8SSagi Grimberg err_rcv_pdu: 15063f2304f8SSagi Grimberg kfree(queue->pdu); 15073f2304f8SSagi Grimberg err_crypto: 15083f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) 15093f2304f8SSagi Grimberg nvme_tcp_free_crypto(queue); 15103f2304f8SSagi Grimberg err_sock: 15113f2304f8SSagi Grimberg sock_release(queue->sock); 15123f2304f8SSagi Grimberg queue->sock = NULL; 15139ebbfe49SChao Leng err_destroy_mutex: 15149ebbfe49SChao Leng mutex_destroy(&queue->queue_lock); 15153f2304f8SSagi Grimberg return ret; 15163f2304f8SSagi Grimberg } 15173f2304f8SSagi Grimberg 15183f2304f8SSagi Grimberg static void nvme_tcp_restore_sock_calls(struct nvme_tcp_queue *queue) 15193f2304f8SSagi Grimberg { 15203f2304f8SSagi Grimberg struct socket *sock = queue->sock; 15213f2304f8SSagi Grimberg 15223f2304f8SSagi Grimberg write_lock_bh(&sock->sk->sk_callback_lock); 15233f2304f8SSagi Grimberg sock->sk->sk_user_data = NULL; 15243f2304f8SSagi Grimberg sock->sk->sk_data_ready = queue->data_ready; 15253f2304f8SSagi Grimberg sock->sk->sk_state_change = queue->state_change; 15263f2304f8SSagi Grimberg sock->sk->sk_write_space = queue->write_space; 15273f2304f8SSagi Grimberg write_unlock_bh(&sock->sk->sk_callback_lock); 15283f2304f8SSagi Grimberg } 15293f2304f8SSagi Grimberg 15303f2304f8SSagi Grimberg static void __nvme_tcp_stop_queue(struct nvme_tcp_queue *queue) 15313f2304f8SSagi Grimberg { 15323f2304f8SSagi Grimberg kernel_sock_shutdown(queue->sock, SHUT_RDWR); 15333f2304f8SSagi Grimberg nvme_tcp_restore_sock_calls(queue); 15343f2304f8SSagi Grimberg cancel_work_sync(&queue->io_work); 15353f2304f8SSagi Grimberg } 15363f2304f8SSagi Grimberg 15373f2304f8SSagi Grimberg static void nvme_tcp_stop_queue(struct nvme_ctrl *nctrl, int qid) 15383f2304f8SSagi Grimberg { 15393f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 15403f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 15413f2304f8SSagi Grimberg 15429ebbfe49SChao Leng mutex_lock(&queue->queue_lock); 15439ebbfe49SChao Leng if (test_and_clear_bit(NVME_TCP_Q_LIVE, &queue->flags)) 15443f2304f8SSagi Grimberg __nvme_tcp_stop_queue(queue); 15459ebbfe49SChao Leng mutex_unlock(&queue->queue_lock); 15463f2304f8SSagi Grimberg } 15473f2304f8SSagi Grimberg 15483f2304f8SSagi Grimberg static int nvme_tcp_start_queue(struct nvme_ctrl *nctrl, int idx) 15493f2304f8SSagi Grimberg { 15503f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 15513f2304f8SSagi Grimberg int ret; 15523f2304f8SSagi Grimberg 15533f2304f8SSagi Grimberg if (idx) 155426c68227SSagi Grimberg ret = nvmf_connect_io_queue(nctrl, idx, false); 15553f2304f8SSagi Grimberg else 15563f2304f8SSagi Grimberg ret = nvmf_connect_admin_queue(nctrl); 15573f2304f8SSagi Grimberg 15583f2304f8SSagi Grimberg if (!ret) { 15593f2304f8SSagi Grimberg set_bit(NVME_TCP_Q_LIVE, &ctrl->queues[idx].flags); 15603f2304f8SSagi Grimberg } else { 1561f34e2589SSagi Grimberg if (test_bit(NVME_TCP_Q_ALLOCATED, &ctrl->queues[idx].flags)) 15623f2304f8SSagi Grimberg __nvme_tcp_stop_queue(&ctrl->queues[idx]); 15633f2304f8SSagi Grimberg dev_err(nctrl->device, 15643f2304f8SSagi Grimberg "failed to connect queue: %d ret=%d\n", idx, ret); 15653f2304f8SSagi Grimberg } 15663f2304f8SSagi Grimberg return ret; 15673f2304f8SSagi Grimberg } 15683f2304f8SSagi Grimberg 15693f2304f8SSagi Grimberg static struct blk_mq_tag_set *nvme_tcp_alloc_tagset(struct nvme_ctrl *nctrl, 15703f2304f8SSagi Grimberg bool admin) 15713f2304f8SSagi Grimberg { 15723f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 15733f2304f8SSagi Grimberg struct blk_mq_tag_set *set; 15743f2304f8SSagi Grimberg int ret; 15753f2304f8SSagi Grimberg 15763f2304f8SSagi Grimberg if (admin) { 15773f2304f8SSagi Grimberg set = &ctrl->admin_tag_set; 15783f2304f8SSagi Grimberg memset(set, 0, sizeof(*set)); 15793f2304f8SSagi Grimberg set->ops = &nvme_tcp_admin_mq_ops; 15803f2304f8SSagi Grimberg set->queue_depth = NVME_AQ_MQ_TAG_DEPTH; 15813f2304f8SSagi Grimberg set->reserved_tags = 2; /* connect + keep-alive */ 1582610c8235SMax Gurtovoy set->numa_node = nctrl->numa_node; 1583db5ad6b7SSagi Grimberg set->flags = BLK_MQ_F_BLOCKING; 15843f2304f8SSagi Grimberg set->cmd_size = sizeof(struct nvme_tcp_request); 15853f2304f8SSagi Grimberg set->driver_data = ctrl; 15863f2304f8SSagi Grimberg set->nr_hw_queues = 1; 1587dc96f938SChaitanya Kulkarni set->timeout = NVME_ADMIN_TIMEOUT; 15883f2304f8SSagi Grimberg } else { 15893f2304f8SSagi Grimberg set = &ctrl->tag_set; 15903f2304f8SSagi Grimberg memset(set, 0, sizeof(*set)); 15913f2304f8SSagi Grimberg set->ops = &nvme_tcp_mq_ops; 15923f2304f8SSagi Grimberg set->queue_depth = nctrl->sqsize + 1; 15933f2304f8SSagi Grimberg set->reserved_tags = 1; /* fabric connect */ 1594610c8235SMax Gurtovoy set->numa_node = nctrl->numa_node; 1595db5ad6b7SSagi Grimberg set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING; 15963f2304f8SSagi Grimberg set->cmd_size = sizeof(struct nvme_tcp_request); 15973f2304f8SSagi Grimberg set->driver_data = ctrl; 15983f2304f8SSagi Grimberg set->nr_hw_queues = nctrl->queue_count - 1; 15993f2304f8SSagi Grimberg set->timeout = NVME_IO_TIMEOUT; 16001a9460ceSSagi Grimberg set->nr_maps = nctrl->opts->nr_poll_queues ? HCTX_MAX_TYPES : 2; 16013f2304f8SSagi Grimberg } 16023f2304f8SSagi Grimberg 16033f2304f8SSagi Grimberg ret = blk_mq_alloc_tag_set(set); 16043f2304f8SSagi Grimberg if (ret) 16053f2304f8SSagi Grimberg return ERR_PTR(ret); 16063f2304f8SSagi Grimberg 16073f2304f8SSagi Grimberg return set; 16083f2304f8SSagi Grimberg } 16093f2304f8SSagi Grimberg 16103f2304f8SSagi Grimberg static void nvme_tcp_free_admin_queue(struct nvme_ctrl *ctrl) 16113f2304f8SSagi Grimberg { 16123f2304f8SSagi Grimberg if (to_tcp_ctrl(ctrl)->async_req.pdu) { 1613ceb1e087SDavid Milburn cancel_work_sync(&ctrl->async_event_work); 16143f2304f8SSagi Grimberg nvme_tcp_free_async_req(to_tcp_ctrl(ctrl)); 16153f2304f8SSagi Grimberg to_tcp_ctrl(ctrl)->async_req.pdu = NULL; 16163f2304f8SSagi Grimberg } 16173f2304f8SSagi Grimberg 16183f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, 0); 16193f2304f8SSagi Grimberg } 16203f2304f8SSagi Grimberg 16213f2304f8SSagi Grimberg static void nvme_tcp_free_io_queues(struct nvme_ctrl *ctrl) 16223f2304f8SSagi Grimberg { 16233f2304f8SSagi Grimberg int i; 16243f2304f8SSagi Grimberg 16253f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) 16263f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, i); 16273f2304f8SSagi Grimberg } 16283f2304f8SSagi Grimberg 16293f2304f8SSagi Grimberg static void nvme_tcp_stop_io_queues(struct nvme_ctrl *ctrl) 16303f2304f8SSagi Grimberg { 16313f2304f8SSagi Grimberg int i; 16323f2304f8SSagi Grimberg 16333f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) 16343f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, i); 16353f2304f8SSagi Grimberg } 16363f2304f8SSagi Grimberg 16373f2304f8SSagi Grimberg static int nvme_tcp_start_io_queues(struct nvme_ctrl *ctrl) 16383f2304f8SSagi Grimberg { 16393f2304f8SSagi Grimberg int i, ret = 0; 16403f2304f8SSagi Grimberg 16413f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) { 16423f2304f8SSagi Grimberg ret = nvme_tcp_start_queue(ctrl, i); 16433f2304f8SSagi Grimberg if (ret) 16443f2304f8SSagi Grimberg goto out_stop_queues; 16453f2304f8SSagi Grimberg } 16463f2304f8SSagi Grimberg 16473f2304f8SSagi Grimberg return 0; 16483f2304f8SSagi Grimberg 16493f2304f8SSagi Grimberg out_stop_queues: 16503f2304f8SSagi Grimberg for (i--; i >= 1; i--) 16513f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, i); 16523f2304f8SSagi Grimberg return ret; 16533f2304f8SSagi Grimberg } 16543f2304f8SSagi Grimberg 16553f2304f8SSagi Grimberg static int nvme_tcp_alloc_admin_queue(struct nvme_ctrl *ctrl) 16563f2304f8SSagi Grimberg { 16573f2304f8SSagi Grimberg int ret; 16583f2304f8SSagi Grimberg 16593f2304f8SSagi Grimberg ret = nvme_tcp_alloc_queue(ctrl, 0, NVME_AQ_DEPTH); 16603f2304f8SSagi Grimberg if (ret) 16613f2304f8SSagi Grimberg return ret; 16623f2304f8SSagi Grimberg 16633f2304f8SSagi Grimberg ret = nvme_tcp_alloc_async_req(to_tcp_ctrl(ctrl)); 16643f2304f8SSagi Grimberg if (ret) 16653f2304f8SSagi Grimberg goto out_free_queue; 16663f2304f8SSagi Grimberg 16673f2304f8SSagi Grimberg return 0; 16683f2304f8SSagi Grimberg 16693f2304f8SSagi Grimberg out_free_queue: 16703f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, 0); 16713f2304f8SSagi Grimberg return ret; 16723f2304f8SSagi Grimberg } 16733f2304f8SSagi Grimberg 1674efb973b1SSagi Grimberg static int __nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl) 16753f2304f8SSagi Grimberg { 16763f2304f8SSagi Grimberg int i, ret; 16773f2304f8SSagi Grimberg 16783f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) { 16793f2304f8SSagi Grimberg ret = nvme_tcp_alloc_queue(ctrl, i, 16803f2304f8SSagi Grimberg ctrl->sqsize + 1); 16813f2304f8SSagi Grimberg if (ret) 16823f2304f8SSagi Grimberg goto out_free_queues; 16833f2304f8SSagi Grimberg } 16843f2304f8SSagi Grimberg 16853f2304f8SSagi Grimberg return 0; 16863f2304f8SSagi Grimberg 16873f2304f8SSagi Grimberg out_free_queues: 16883f2304f8SSagi Grimberg for (i--; i >= 1; i--) 16893f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, i); 16903f2304f8SSagi Grimberg 16913f2304f8SSagi Grimberg return ret; 16923f2304f8SSagi Grimberg } 16933f2304f8SSagi Grimberg 16943f2304f8SSagi Grimberg static unsigned int nvme_tcp_nr_io_queues(struct nvme_ctrl *ctrl) 16953f2304f8SSagi Grimberg { 1696873946f4SSagi Grimberg unsigned int nr_io_queues; 1697873946f4SSagi Grimberg 1698873946f4SSagi Grimberg nr_io_queues = min(ctrl->opts->nr_io_queues, num_online_cpus()); 1699873946f4SSagi Grimberg nr_io_queues += min(ctrl->opts->nr_write_queues, num_online_cpus()); 17001a9460ceSSagi Grimberg nr_io_queues += min(ctrl->opts->nr_poll_queues, num_online_cpus()); 1701873946f4SSagi Grimberg 1702873946f4SSagi Grimberg return nr_io_queues; 17033f2304f8SSagi Grimberg } 17043f2304f8SSagi Grimberg 170564861993SSagi Grimberg static void nvme_tcp_set_io_queues(struct nvme_ctrl *nctrl, 170664861993SSagi Grimberg unsigned int nr_io_queues) 170764861993SSagi Grimberg { 170864861993SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 170964861993SSagi Grimberg struct nvmf_ctrl_options *opts = nctrl->opts; 171064861993SSagi Grimberg 171164861993SSagi Grimberg if (opts->nr_write_queues && opts->nr_io_queues < nr_io_queues) { 171264861993SSagi Grimberg /* 171364861993SSagi Grimberg * separate read/write queues 171464861993SSagi Grimberg * hand out dedicated default queues only after we have 171564861993SSagi Grimberg * sufficient read queues. 171664861993SSagi Grimberg */ 171764861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] = opts->nr_io_queues; 171864861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_READ]; 171964861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] = 172064861993SSagi Grimberg min(opts->nr_write_queues, nr_io_queues); 172164861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; 172264861993SSagi Grimberg } else { 172364861993SSagi Grimberg /* 172464861993SSagi Grimberg * shared read/write queues 172564861993SSagi Grimberg * either no write queues were requested, or we don't have 172664861993SSagi Grimberg * sufficient queue count to have dedicated default queues. 172764861993SSagi Grimberg */ 172864861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] = 172964861993SSagi Grimberg min(opts->nr_io_queues, nr_io_queues); 173064861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; 173164861993SSagi Grimberg } 17321a9460ceSSagi Grimberg 17331a9460ceSSagi Grimberg if (opts->nr_poll_queues && nr_io_queues) { 17341a9460ceSSagi Grimberg /* map dedicated poll queues only if we have queues left */ 17351a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL] = 17361a9460ceSSagi Grimberg min(opts->nr_poll_queues, nr_io_queues); 17371a9460ceSSagi Grimberg } 173864861993SSagi Grimberg } 173964861993SSagi Grimberg 1740efb973b1SSagi Grimberg static int nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl) 17413f2304f8SSagi Grimberg { 17423f2304f8SSagi Grimberg unsigned int nr_io_queues; 17433f2304f8SSagi Grimberg int ret; 17443f2304f8SSagi Grimberg 17453f2304f8SSagi Grimberg nr_io_queues = nvme_tcp_nr_io_queues(ctrl); 17463f2304f8SSagi Grimberg ret = nvme_set_queue_count(ctrl, &nr_io_queues); 17473f2304f8SSagi Grimberg if (ret) 17483f2304f8SSagi Grimberg return ret; 17493f2304f8SSagi Grimberg 17503f2304f8SSagi Grimberg ctrl->queue_count = nr_io_queues + 1; 17513f2304f8SSagi Grimberg if (ctrl->queue_count < 2) 17523f2304f8SSagi Grimberg return 0; 17533f2304f8SSagi Grimberg 17543f2304f8SSagi Grimberg dev_info(ctrl->device, 17553f2304f8SSagi Grimberg "creating %d I/O queues.\n", nr_io_queues); 17563f2304f8SSagi Grimberg 175764861993SSagi Grimberg nvme_tcp_set_io_queues(ctrl, nr_io_queues); 175864861993SSagi Grimberg 1759efb973b1SSagi Grimberg return __nvme_tcp_alloc_io_queues(ctrl); 17603f2304f8SSagi Grimberg } 17613f2304f8SSagi Grimberg 17623f2304f8SSagi Grimberg static void nvme_tcp_destroy_io_queues(struct nvme_ctrl *ctrl, bool remove) 17633f2304f8SSagi Grimberg { 17643f2304f8SSagi Grimberg nvme_tcp_stop_io_queues(ctrl); 17653f2304f8SSagi Grimberg if (remove) { 17663f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->connect_q); 17673f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->tagset); 17683f2304f8SSagi Grimberg } 17693f2304f8SSagi Grimberg nvme_tcp_free_io_queues(ctrl); 17703f2304f8SSagi Grimberg } 17713f2304f8SSagi Grimberg 17723f2304f8SSagi Grimberg static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new) 17733f2304f8SSagi Grimberg { 17743f2304f8SSagi Grimberg int ret; 17753f2304f8SSagi Grimberg 1776efb973b1SSagi Grimberg ret = nvme_tcp_alloc_io_queues(ctrl); 17773f2304f8SSagi Grimberg if (ret) 17783f2304f8SSagi Grimberg return ret; 17793f2304f8SSagi Grimberg 17803f2304f8SSagi Grimberg if (new) { 17813f2304f8SSagi Grimberg ctrl->tagset = nvme_tcp_alloc_tagset(ctrl, false); 17823f2304f8SSagi Grimberg if (IS_ERR(ctrl->tagset)) { 17833f2304f8SSagi Grimberg ret = PTR_ERR(ctrl->tagset); 17843f2304f8SSagi Grimberg goto out_free_io_queues; 17853f2304f8SSagi Grimberg } 17863f2304f8SSagi Grimberg 17873f2304f8SSagi Grimberg ctrl->connect_q = blk_mq_init_queue(ctrl->tagset); 17883f2304f8SSagi Grimberg if (IS_ERR(ctrl->connect_q)) { 17893f2304f8SSagi Grimberg ret = PTR_ERR(ctrl->connect_q); 17903f2304f8SSagi Grimberg goto out_free_tag_set; 17913f2304f8SSagi Grimberg } 17923f2304f8SSagi Grimberg } 17933f2304f8SSagi Grimberg 17943f2304f8SSagi Grimberg ret = nvme_tcp_start_io_queues(ctrl); 17953f2304f8SSagi Grimberg if (ret) 17963f2304f8SSagi Grimberg goto out_cleanup_connect_q; 17973f2304f8SSagi Grimberg 17982875b0aeSSagi Grimberg if (!new) { 17992875b0aeSSagi Grimberg nvme_start_queues(ctrl); 1800e5c01f4fSSagi Grimberg if (!nvme_wait_freeze_timeout(ctrl, NVME_IO_TIMEOUT)) { 1801e5c01f4fSSagi Grimberg /* 1802e5c01f4fSSagi Grimberg * If we timed out waiting for freeze we are likely to 1803e5c01f4fSSagi Grimberg * be stuck. Fail the controller initialization just 1804e5c01f4fSSagi Grimberg * to be safe. 1805e5c01f4fSSagi Grimberg */ 1806e5c01f4fSSagi Grimberg ret = -ENODEV; 1807e5c01f4fSSagi Grimberg goto out_wait_freeze_timed_out; 1808e5c01f4fSSagi Grimberg } 18092875b0aeSSagi Grimberg blk_mq_update_nr_hw_queues(ctrl->tagset, 18102875b0aeSSagi Grimberg ctrl->queue_count - 1); 18112875b0aeSSagi Grimberg nvme_unfreeze(ctrl); 18122875b0aeSSagi Grimberg } 18132875b0aeSSagi Grimberg 18143f2304f8SSagi Grimberg return 0; 18153f2304f8SSagi Grimberg 1816e5c01f4fSSagi Grimberg out_wait_freeze_timed_out: 1817e5c01f4fSSagi Grimberg nvme_stop_queues(ctrl); 181870a99574SChao Leng nvme_sync_io_queues(ctrl); 1819e5c01f4fSSagi Grimberg nvme_tcp_stop_io_queues(ctrl); 18203f2304f8SSagi Grimberg out_cleanup_connect_q: 182170a99574SChao Leng nvme_cancel_tagset(ctrl); 1822e85037a2SSagi Grimberg if (new) 18233f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->connect_q); 18243f2304f8SSagi Grimberg out_free_tag_set: 18253f2304f8SSagi Grimberg if (new) 18263f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->tagset); 18273f2304f8SSagi Grimberg out_free_io_queues: 18283f2304f8SSagi Grimberg nvme_tcp_free_io_queues(ctrl); 18293f2304f8SSagi Grimberg return ret; 18303f2304f8SSagi Grimberg } 18313f2304f8SSagi Grimberg 18323f2304f8SSagi Grimberg static void nvme_tcp_destroy_admin_queue(struct nvme_ctrl *ctrl, bool remove) 18333f2304f8SSagi Grimberg { 18343f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 18353f2304f8SSagi Grimberg if (remove) { 18363f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->admin_q); 1837e7832cb4SSagi Grimberg blk_cleanup_queue(ctrl->fabrics_q); 18383f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->admin_tagset); 18393f2304f8SSagi Grimberg } 18403f2304f8SSagi Grimberg nvme_tcp_free_admin_queue(ctrl); 18413f2304f8SSagi Grimberg } 18423f2304f8SSagi Grimberg 18433f2304f8SSagi Grimberg static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new) 18443f2304f8SSagi Grimberg { 18453f2304f8SSagi Grimberg int error; 18463f2304f8SSagi Grimberg 18473f2304f8SSagi Grimberg error = nvme_tcp_alloc_admin_queue(ctrl); 18483f2304f8SSagi Grimberg if (error) 18493f2304f8SSagi Grimberg return error; 18503f2304f8SSagi Grimberg 18513f2304f8SSagi Grimberg if (new) { 18523f2304f8SSagi Grimberg ctrl->admin_tagset = nvme_tcp_alloc_tagset(ctrl, true); 18533f2304f8SSagi Grimberg if (IS_ERR(ctrl->admin_tagset)) { 18543f2304f8SSagi Grimberg error = PTR_ERR(ctrl->admin_tagset); 18553f2304f8SSagi Grimberg goto out_free_queue; 18563f2304f8SSagi Grimberg } 18573f2304f8SSagi Grimberg 1858e7832cb4SSagi Grimberg ctrl->fabrics_q = blk_mq_init_queue(ctrl->admin_tagset); 1859e7832cb4SSagi Grimberg if (IS_ERR(ctrl->fabrics_q)) { 1860e7832cb4SSagi Grimberg error = PTR_ERR(ctrl->fabrics_q); 1861e7832cb4SSagi Grimberg goto out_free_tagset; 1862e7832cb4SSagi Grimberg } 1863e7832cb4SSagi Grimberg 18643f2304f8SSagi Grimberg ctrl->admin_q = blk_mq_init_queue(ctrl->admin_tagset); 18653f2304f8SSagi Grimberg if (IS_ERR(ctrl->admin_q)) { 18663f2304f8SSagi Grimberg error = PTR_ERR(ctrl->admin_q); 1867e7832cb4SSagi Grimberg goto out_cleanup_fabrics_q; 18683f2304f8SSagi Grimberg } 18693f2304f8SSagi Grimberg } 18703f2304f8SSagi Grimberg 18713f2304f8SSagi Grimberg error = nvme_tcp_start_queue(ctrl, 0); 18723f2304f8SSagi Grimberg if (error) 18733f2304f8SSagi Grimberg goto out_cleanup_queue; 18743f2304f8SSagi Grimberg 1875c0f2f45bSSagi Grimberg error = nvme_enable_ctrl(ctrl); 18763f2304f8SSagi Grimberg if (error) 18773f2304f8SSagi Grimberg goto out_stop_queue; 18783f2304f8SSagi Grimberg 1879e7832cb4SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 1880e7832cb4SSagi Grimberg 1881f21c4769SChaitanya Kulkarni error = nvme_init_ctrl_finish(ctrl); 18823f2304f8SSagi Grimberg if (error) 188370a99574SChao Leng goto out_quiesce_queue; 18843f2304f8SSagi Grimberg 18853f2304f8SSagi Grimberg return 0; 18863f2304f8SSagi Grimberg 188770a99574SChao Leng out_quiesce_queue: 188870a99574SChao Leng blk_mq_quiesce_queue(ctrl->admin_q); 188970a99574SChao Leng blk_sync_queue(ctrl->admin_q); 18903f2304f8SSagi Grimberg out_stop_queue: 18913f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 189270a99574SChao Leng nvme_cancel_admin_tagset(ctrl); 18933f2304f8SSagi Grimberg out_cleanup_queue: 18943f2304f8SSagi Grimberg if (new) 18953f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->admin_q); 1896e7832cb4SSagi Grimberg out_cleanup_fabrics_q: 1897e7832cb4SSagi Grimberg if (new) 1898e7832cb4SSagi Grimberg blk_cleanup_queue(ctrl->fabrics_q); 18993f2304f8SSagi Grimberg out_free_tagset: 19003f2304f8SSagi Grimberg if (new) 19013f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->admin_tagset); 19023f2304f8SSagi Grimberg out_free_queue: 19033f2304f8SSagi Grimberg nvme_tcp_free_admin_queue(ctrl); 19043f2304f8SSagi Grimberg return error; 19053f2304f8SSagi Grimberg } 19063f2304f8SSagi Grimberg 19073f2304f8SSagi Grimberg static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl, 19083f2304f8SSagi Grimberg bool remove) 19093f2304f8SSagi Grimberg { 19103f2304f8SSagi Grimberg blk_mq_quiesce_queue(ctrl->admin_q); 1911d6f66210SChao Leng blk_sync_queue(ctrl->admin_q); 19123f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 1913563c8158SChao Leng nvme_cancel_admin_tagset(ctrl); 1914e7832cb4SSagi Grimberg if (remove) 19153f2304f8SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 19163f2304f8SSagi Grimberg nvme_tcp_destroy_admin_queue(ctrl, remove); 19173f2304f8SSagi Grimberg } 19183f2304f8SSagi Grimberg 19193f2304f8SSagi Grimberg static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl, 19203f2304f8SSagi Grimberg bool remove) 19213f2304f8SSagi Grimberg { 19223f2304f8SSagi Grimberg if (ctrl->queue_count <= 1) 1923d6f66210SChao Leng return; 1924d4d61470SSagi Grimberg blk_mq_quiesce_queue(ctrl->admin_q); 19252875b0aeSSagi Grimberg nvme_start_freeze(ctrl); 19263f2304f8SSagi Grimberg nvme_stop_queues(ctrl); 1927d6f66210SChao Leng nvme_sync_io_queues(ctrl); 19283f2304f8SSagi Grimberg nvme_tcp_stop_io_queues(ctrl); 1929563c8158SChao Leng nvme_cancel_tagset(ctrl); 19303f2304f8SSagi Grimberg if (remove) 19313f2304f8SSagi Grimberg nvme_start_queues(ctrl); 19323f2304f8SSagi Grimberg nvme_tcp_destroy_io_queues(ctrl, remove); 19333f2304f8SSagi Grimberg } 19343f2304f8SSagi Grimberg 19353f2304f8SSagi Grimberg static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl) 19363f2304f8SSagi Grimberg { 19373f2304f8SSagi Grimberg /* If we are resetting/deleting then do nothing */ 19383f2304f8SSagi Grimberg if (ctrl->state != NVME_CTRL_CONNECTING) { 19393f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state == NVME_CTRL_NEW || 19403f2304f8SSagi Grimberg ctrl->state == NVME_CTRL_LIVE); 19413f2304f8SSagi Grimberg return; 19423f2304f8SSagi Grimberg } 19433f2304f8SSagi Grimberg 19443f2304f8SSagi Grimberg if (nvmf_should_reconnect(ctrl)) { 19453f2304f8SSagi Grimberg dev_info(ctrl->device, "Reconnecting in %d seconds...\n", 19463f2304f8SSagi Grimberg ctrl->opts->reconnect_delay); 19473f2304f8SSagi Grimberg queue_delayed_work(nvme_wq, &to_tcp_ctrl(ctrl)->connect_work, 19483f2304f8SSagi Grimberg ctrl->opts->reconnect_delay * HZ); 19493f2304f8SSagi Grimberg } else { 19503f2304f8SSagi Grimberg dev_info(ctrl->device, "Removing controller...\n"); 19513f2304f8SSagi Grimberg nvme_delete_ctrl(ctrl); 19523f2304f8SSagi Grimberg } 19533f2304f8SSagi Grimberg } 19543f2304f8SSagi Grimberg 19553f2304f8SSagi Grimberg static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new) 19563f2304f8SSagi Grimberg { 19573f2304f8SSagi Grimberg struct nvmf_ctrl_options *opts = ctrl->opts; 1958312910f4SColin Ian King int ret; 19593f2304f8SSagi Grimberg 19603f2304f8SSagi Grimberg ret = nvme_tcp_configure_admin_queue(ctrl, new); 19613f2304f8SSagi Grimberg if (ret) 19623f2304f8SSagi Grimberg return ret; 19633f2304f8SSagi Grimberg 19643f2304f8SSagi Grimberg if (ctrl->icdoff) { 19653f2304f8SSagi Grimberg dev_err(ctrl->device, "icdoff is not supported!\n"); 19663f2304f8SSagi Grimberg goto destroy_admin; 19673f2304f8SSagi Grimberg } 19683f2304f8SSagi Grimberg 1969*73ffcefcSMax Gurtovoy if (!(ctrl->sgls & ((1 << 0) | (1 << 1)))) { 1970*73ffcefcSMax Gurtovoy dev_err(ctrl->device, "Mandatory sgls are not supported!\n"); 1971*73ffcefcSMax Gurtovoy goto destroy_admin; 1972*73ffcefcSMax Gurtovoy } 1973*73ffcefcSMax Gurtovoy 19743f2304f8SSagi Grimberg if (opts->queue_size > ctrl->sqsize + 1) 19753f2304f8SSagi Grimberg dev_warn(ctrl->device, 19763f2304f8SSagi Grimberg "queue_size %zu > ctrl sqsize %u, clamping down\n", 19773f2304f8SSagi Grimberg opts->queue_size, ctrl->sqsize + 1); 19783f2304f8SSagi Grimberg 19793f2304f8SSagi Grimberg if (ctrl->sqsize + 1 > ctrl->maxcmd) { 19803f2304f8SSagi Grimberg dev_warn(ctrl->device, 19813f2304f8SSagi Grimberg "sqsize %u > ctrl maxcmd %u, clamping down\n", 19823f2304f8SSagi Grimberg ctrl->sqsize + 1, ctrl->maxcmd); 19833f2304f8SSagi Grimberg ctrl->sqsize = ctrl->maxcmd - 1; 19843f2304f8SSagi Grimberg } 19853f2304f8SSagi Grimberg 19863f2304f8SSagi Grimberg if (ctrl->queue_count > 1) { 19873f2304f8SSagi Grimberg ret = nvme_tcp_configure_io_queues(ctrl, new); 19883f2304f8SSagi Grimberg if (ret) 19893f2304f8SSagi Grimberg goto destroy_admin; 19903f2304f8SSagi Grimberg } 19913f2304f8SSagi Grimberg 19923f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) { 1993bea54ef5SIsrael Rukshin /* 1994ecca390eSSagi Grimberg * state change failure is ok if we started ctrl delete, 1995bea54ef5SIsrael Rukshin * unless we're during creation of a new controller to 1996bea54ef5SIsrael Rukshin * avoid races with teardown flow. 1997bea54ef5SIsrael Rukshin */ 1998ecca390eSSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING && 1999ecca390eSSagi Grimberg ctrl->state != NVME_CTRL_DELETING_NOIO); 2000bea54ef5SIsrael Rukshin WARN_ON_ONCE(new); 20013f2304f8SSagi Grimberg ret = -EINVAL; 20023f2304f8SSagi Grimberg goto destroy_io; 20033f2304f8SSagi Grimberg } 20043f2304f8SSagi Grimberg 20053f2304f8SSagi Grimberg nvme_start_ctrl(ctrl); 20063f2304f8SSagi Grimberg return 0; 20073f2304f8SSagi Grimberg 20083f2304f8SSagi Grimberg destroy_io: 200970a99574SChao Leng if (ctrl->queue_count > 1) { 201070a99574SChao Leng nvme_stop_queues(ctrl); 201170a99574SChao Leng nvme_sync_io_queues(ctrl); 201270a99574SChao Leng nvme_tcp_stop_io_queues(ctrl); 201370a99574SChao Leng nvme_cancel_tagset(ctrl); 20143f2304f8SSagi Grimberg nvme_tcp_destroy_io_queues(ctrl, new); 201570a99574SChao Leng } 20163f2304f8SSagi Grimberg destroy_admin: 201770a99574SChao Leng blk_mq_quiesce_queue(ctrl->admin_q); 201870a99574SChao Leng blk_sync_queue(ctrl->admin_q); 20193f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 202070a99574SChao Leng nvme_cancel_admin_tagset(ctrl); 20213f2304f8SSagi Grimberg nvme_tcp_destroy_admin_queue(ctrl, new); 20223f2304f8SSagi Grimberg return ret; 20233f2304f8SSagi Grimberg } 20243f2304f8SSagi Grimberg 20253f2304f8SSagi Grimberg static void nvme_tcp_reconnect_ctrl_work(struct work_struct *work) 20263f2304f8SSagi Grimberg { 20273f2304f8SSagi Grimberg struct nvme_tcp_ctrl *tcp_ctrl = container_of(to_delayed_work(work), 20283f2304f8SSagi Grimberg struct nvme_tcp_ctrl, connect_work); 20293f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = &tcp_ctrl->ctrl; 20303f2304f8SSagi Grimberg 20313f2304f8SSagi Grimberg ++ctrl->nr_reconnects; 20323f2304f8SSagi Grimberg 20333f2304f8SSagi Grimberg if (nvme_tcp_setup_ctrl(ctrl, false)) 20343f2304f8SSagi Grimberg goto requeue; 20353f2304f8SSagi Grimberg 203656a77d26SColin Ian King dev_info(ctrl->device, "Successfully reconnected (%d attempt)\n", 20373f2304f8SSagi Grimberg ctrl->nr_reconnects); 20383f2304f8SSagi Grimberg 20393f2304f8SSagi Grimberg ctrl->nr_reconnects = 0; 20403f2304f8SSagi Grimberg 20413f2304f8SSagi Grimberg return; 20423f2304f8SSagi Grimberg 20433f2304f8SSagi Grimberg requeue: 20443f2304f8SSagi Grimberg dev_info(ctrl->device, "Failed reconnect attempt %d\n", 20453f2304f8SSagi Grimberg ctrl->nr_reconnects); 20463f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 20473f2304f8SSagi Grimberg } 20483f2304f8SSagi Grimberg 20493f2304f8SSagi Grimberg static void nvme_tcp_error_recovery_work(struct work_struct *work) 20503f2304f8SSagi Grimberg { 20513f2304f8SSagi Grimberg struct nvme_tcp_ctrl *tcp_ctrl = container_of(work, 20523f2304f8SSagi Grimberg struct nvme_tcp_ctrl, err_work); 20533f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = &tcp_ctrl->ctrl; 20543f2304f8SSagi Grimberg 20553f2304f8SSagi Grimberg nvme_stop_keep_alive(ctrl); 20563f2304f8SSagi Grimberg nvme_tcp_teardown_io_queues(ctrl, false); 20573f2304f8SSagi Grimberg /* unquiesce to fail fast pending requests */ 20583f2304f8SSagi Grimberg nvme_start_queues(ctrl); 20593f2304f8SSagi Grimberg nvme_tcp_teardown_admin_queue(ctrl, false); 2060e7832cb4SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 20613f2304f8SSagi Grimberg 20623f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_CONNECTING)) { 2063ecca390eSSagi Grimberg /* state change failure is ok if we started ctrl delete */ 2064ecca390eSSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING && 2065ecca390eSSagi Grimberg ctrl->state != NVME_CTRL_DELETING_NOIO); 20663f2304f8SSagi Grimberg return; 20673f2304f8SSagi Grimberg } 20683f2304f8SSagi Grimberg 20693f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 20703f2304f8SSagi Grimberg } 20713f2304f8SSagi Grimberg 20723f2304f8SSagi Grimberg static void nvme_tcp_teardown_ctrl(struct nvme_ctrl *ctrl, bool shutdown) 20733f2304f8SSagi Grimberg { 2074794a4cb3SSagi Grimberg cancel_work_sync(&to_tcp_ctrl(ctrl)->err_work); 2075794a4cb3SSagi Grimberg cancel_delayed_work_sync(&to_tcp_ctrl(ctrl)->connect_work); 2076794a4cb3SSagi Grimberg 20773f2304f8SSagi Grimberg nvme_tcp_teardown_io_queues(ctrl, shutdown); 2078e7832cb4SSagi Grimberg blk_mq_quiesce_queue(ctrl->admin_q); 20793f2304f8SSagi Grimberg if (shutdown) 20803f2304f8SSagi Grimberg nvme_shutdown_ctrl(ctrl); 20813f2304f8SSagi Grimberg else 2082b5b05048SSagi Grimberg nvme_disable_ctrl(ctrl); 20833f2304f8SSagi Grimberg nvme_tcp_teardown_admin_queue(ctrl, shutdown); 20843f2304f8SSagi Grimberg } 20853f2304f8SSagi Grimberg 20863f2304f8SSagi Grimberg static void nvme_tcp_delete_ctrl(struct nvme_ctrl *ctrl) 20873f2304f8SSagi Grimberg { 20883f2304f8SSagi Grimberg nvme_tcp_teardown_ctrl(ctrl, true); 20893f2304f8SSagi Grimberg } 20903f2304f8SSagi Grimberg 20913f2304f8SSagi Grimberg static void nvme_reset_ctrl_work(struct work_struct *work) 20923f2304f8SSagi Grimberg { 20933f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = 20943f2304f8SSagi Grimberg container_of(work, struct nvme_ctrl, reset_work); 20953f2304f8SSagi Grimberg 20963f2304f8SSagi Grimberg nvme_stop_ctrl(ctrl); 20973f2304f8SSagi Grimberg nvme_tcp_teardown_ctrl(ctrl, false); 20983f2304f8SSagi Grimberg 20993f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_CONNECTING)) { 2100ecca390eSSagi Grimberg /* state change failure is ok if we started ctrl delete */ 2101ecca390eSSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING && 2102ecca390eSSagi Grimberg ctrl->state != NVME_CTRL_DELETING_NOIO); 21033f2304f8SSagi Grimberg return; 21043f2304f8SSagi Grimberg } 21053f2304f8SSagi Grimberg 21063f2304f8SSagi Grimberg if (nvme_tcp_setup_ctrl(ctrl, false)) 21073f2304f8SSagi Grimberg goto out_fail; 21083f2304f8SSagi Grimberg 21093f2304f8SSagi Grimberg return; 21103f2304f8SSagi Grimberg 21113f2304f8SSagi Grimberg out_fail: 21123f2304f8SSagi Grimberg ++ctrl->nr_reconnects; 21133f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 21143f2304f8SSagi Grimberg } 21153f2304f8SSagi Grimberg 21163f2304f8SSagi Grimberg static void nvme_tcp_free_ctrl(struct nvme_ctrl *nctrl) 21173f2304f8SSagi Grimberg { 21183f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 21193f2304f8SSagi Grimberg 21203f2304f8SSagi Grimberg if (list_empty(&ctrl->list)) 21213f2304f8SSagi Grimberg goto free_ctrl; 21223f2304f8SSagi Grimberg 21233f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 21243f2304f8SSagi Grimberg list_del(&ctrl->list); 21253f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 21263f2304f8SSagi Grimberg 21273f2304f8SSagi Grimberg nvmf_free_options(nctrl->opts); 21283f2304f8SSagi Grimberg free_ctrl: 21293f2304f8SSagi Grimberg kfree(ctrl->queues); 21303f2304f8SSagi Grimberg kfree(ctrl); 21313f2304f8SSagi Grimberg } 21323f2304f8SSagi Grimberg 21333f2304f8SSagi Grimberg static void nvme_tcp_set_sg_null(struct nvme_command *c) 21343f2304f8SSagi Grimberg { 21353f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 21363f2304f8SSagi Grimberg 21373f2304f8SSagi Grimberg sg->addr = 0; 21383f2304f8SSagi Grimberg sg->length = 0; 21393f2304f8SSagi Grimberg sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 21403f2304f8SSagi Grimberg NVME_SGL_FMT_TRANSPORT_A; 21413f2304f8SSagi Grimberg } 21423f2304f8SSagi Grimberg 21433f2304f8SSagi Grimberg static void nvme_tcp_set_sg_inline(struct nvme_tcp_queue *queue, 21443f2304f8SSagi Grimberg struct nvme_command *c, u32 data_len) 21453f2304f8SSagi Grimberg { 21463f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 21473f2304f8SSagi Grimberg 21483f2304f8SSagi Grimberg sg->addr = cpu_to_le64(queue->ctrl->ctrl.icdoff); 21493f2304f8SSagi Grimberg sg->length = cpu_to_le32(data_len); 21503f2304f8SSagi Grimberg sg->type = (NVME_SGL_FMT_DATA_DESC << 4) | NVME_SGL_FMT_OFFSET; 21513f2304f8SSagi Grimberg } 21523f2304f8SSagi Grimberg 21533f2304f8SSagi Grimberg static void nvme_tcp_set_sg_host_data(struct nvme_command *c, 21543f2304f8SSagi Grimberg u32 data_len) 21553f2304f8SSagi Grimberg { 21563f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 21573f2304f8SSagi Grimberg 21583f2304f8SSagi Grimberg sg->addr = 0; 21593f2304f8SSagi Grimberg sg->length = cpu_to_le32(data_len); 21603f2304f8SSagi Grimberg sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 21613f2304f8SSagi Grimberg NVME_SGL_FMT_TRANSPORT_A; 21623f2304f8SSagi Grimberg } 21633f2304f8SSagi Grimberg 21643f2304f8SSagi Grimberg static void nvme_tcp_submit_async_event(struct nvme_ctrl *arg) 21653f2304f8SSagi Grimberg { 21663f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(arg); 21673f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 21683f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = ctrl->async_req.pdu; 21693f2304f8SSagi Grimberg struct nvme_command *cmd = &pdu->cmd; 21703f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 21713f2304f8SSagi Grimberg 21723f2304f8SSagi Grimberg memset(pdu, 0, sizeof(*pdu)); 21733f2304f8SSagi Grimberg pdu->hdr.type = nvme_tcp_cmd; 21743f2304f8SSagi Grimberg if (queue->hdr_digest) 21753f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_HDGST; 21763f2304f8SSagi Grimberg pdu->hdr.hlen = sizeof(*pdu); 21773f2304f8SSagi Grimberg pdu->hdr.plen = cpu_to_le32(pdu->hdr.hlen + hdgst); 21783f2304f8SSagi Grimberg 21793f2304f8SSagi Grimberg cmd->common.opcode = nvme_admin_async_event; 21803f2304f8SSagi Grimberg cmd->common.command_id = NVME_AQ_BLK_MQ_DEPTH; 21813f2304f8SSagi Grimberg cmd->common.flags |= NVME_CMD_SGL_METABUF; 21823f2304f8SSagi Grimberg nvme_tcp_set_sg_null(cmd); 21833f2304f8SSagi Grimberg 21843f2304f8SSagi Grimberg ctrl->async_req.state = NVME_TCP_SEND_CMD_PDU; 21853f2304f8SSagi Grimberg ctrl->async_req.offset = 0; 21863f2304f8SSagi Grimberg ctrl->async_req.curr_bio = NULL; 21873f2304f8SSagi Grimberg ctrl->async_req.data_len = 0; 21883f2304f8SSagi Grimberg 218986f0348aSSagi Grimberg nvme_tcp_queue_request(&ctrl->async_req, true, true); 21903f2304f8SSagi Grimberg } 21913f2304f8SSagi Grimberg 2192236187c4SSagi Grimberg static void nvme_tcp_complete_timed_out(struct request *rq) 2193236187c4SSagi Grimberg { 2194236187c4SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 2195236187c4SSagi Grimberg struct nvme_ctrl *ctrl = &req->queue->ctrl->ctrl; 2196236187c4SSagi Grimberg 2197236187c4SSagi Grimberg nvme_tcp_stop_queue(ctrl, nvme_tcp_queue_id(req->queue)); 21980a8a2c85SSagi Grimberg if (blk_mq_request_started(rq) && !blk_mq_request_completed(rq)) { 2199236187c4SSagi Grimberg nvme_req(rq)->status = NVME_SC_HOST_ABORTED_CMD; 2200236187c4SSagi Grimberg blk_mq_complete_request(rq); 2201236187c4SSagi Grimberg } 2202236187c4SSagi Grimberg } 2203236187c4SSagi Grimberg 22043f2304f8SSagi Grimberg static enum blk_eh_timer_return 22053f2304f8SSagi Grimberg nvme_tcp_timeout(struct request *rq, bool reserved) 22063f2304f8SSagi Grimberg { 22073f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 2208236187c4SSagi Grimberg struct nvme_ctrl *ctrl = &req->queue->ctrl->ctrl; 22093f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 22103f2304f8SSagi Grimberg 2211236187c4SSagi Grimberg dev_warn(ctrl->device, 22123f2304f8SSagi Grimberg "queue %d: timeout request %#x type %d\n", 221339d57757SSagi Grimberg nvme_tcp_queue_id(req->queue), rq->tag, pdu->hdr.type); 22143f2304f8SSagi Grimberg 2215236187c4SSagi Grimberg if (ctrl->state != NVME_CTRL_LIVE) { 221639d57757SSagi Grimberg /* 2217236187c4SSagi Grimberg * If we are resetting, connecting or deleting we should 2218236187c4SSagi Grimberg * complete immediately because we may block controller 2219236187c4SSagi Grimberg * teardown or setup sequence 2220236187c4SSagi Grimberg * - ctrl disable/shutdown fabrics requests 2221236187c4SSagi Grimberg * - connect requests 2222236187c4SSagi Grimberg * - initialization admin requests 2223236187c4SSagi Grimberg * - I/O requests that entered after unquiescing and 2224236187c4SSagi Grimberg * the controller stopped responding 2225236187c4SSagi Grimberg * 2226236187c4SSagi Grimberg * All other requests should be cancelled by the error 2227236187c4SSagi Grimberg * recovery work, so it's fine that we fail it here. 222839d57757SSagi Grimberg */ 2229236187c4SSagi Grimberg nvme_tcp_complete_timed_out(rq); 22303f2304f8SSagi Grimberg return BLK_EH_DONE; 22313f2304f8SSagi Grimberg } 22323f2304f8SSagi Grimberg 2233236187c4SSagi Grimberg /* 2234236187c4SSagi Grimberg * LIVE state should trigger the normal error recovery which will 2235236187c4SSagi Grimberg * handle completing this request. 2236236187c4SSagi Grimberg */ 2237236187c4SSagi Grimberg nvme_tcp_error_recovery(ctrl); 22383f2304f8SSagi Grimberg return BLK_EH_RESET_TIMER; 22393f2304f8SSagi Grimberg } 22403f2304f8SSagi Grimberg 22413f2304f8SSagi Grimberg static blk_status_t nvme_tcp_map_data(struct nvme_tcp_queue *queue, 22423f2304f8SSagi Grimberg struct request *rq) 22433f2304f8SSagi Grimberg { 22443f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 22453f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 22463f2304f8SSagi Grimberg struct nvme_command *c = &pdu->cmd; 22473f2304f8SSagi Grimberg 22483f2304f8SSagi Grimberg c->common.flags |= NVME_CMD_SGL_METABUF; 22493f2304f8SSagi Grimberg 225025e5cb78SSagi Grimberg if (!blk_rq_nr_phys_segments(rq)) 225125e5cb78SSagi Grimberg nvme_tcp_set_sg_null(c); 225225e5cb78SSagi Grimberg else if (rq_data_dir(rq) == WRITE && 22533f2304f8SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(queue)) 22543f2304f8SSagi Grimberg nvme_tcp_set_sg_inline(queue, c, req->data_len); 22553f2304f8SSagi Grimberg else 22563f2304f8SSagi Grimberg nvme_tcp_set_sg_host_data(c, req->data_len); 22573f2304f8SSagi Grimberg 22583f2304f8SSagi Grimberg return 0; 22593f2304f8SSagi Grimberg } 22603f2304f8SSagi Grimberg 22613f2304f8SSagi Grimberg static blk_status_t nvme_tcp_setup_cmd_pdu(struct nvme_ns *ns, 22623f2304f8SSagi Grimberg struct request *rq) 22633f2304f8SSagi Grimberg { 22643f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 22653f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 22663f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 22673f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue), ddgst = 0; 22683f2304f8SSagi Grimberg blk_status_t ret; 22693f2304f8SSagi Grimberg 2270f4b9e6c9SKeith Busch ret = nvme_setup_cmd(ns, rq); 22713f2304f8SSagi Grimberg if (ret) 22723f2304f8SSagi Grimberg return ret; 22733f2304f8SSagi Grimberg 22743f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_CMD_PDU; 22753f2304f8SSagi Grimberg req->offset = 0; 22763f2304f8SSagi Grimberg req->data_sent = 0; 22773f2304f8SSagi Grimberg req->pdu_len = 0; 22783f2304f8SSagi Grimberg req->pdu_sent = 0; 227925e5cb78SSagi Grimberg req->data_len = blk_rq_nr_phys_segments(rq) ? 228025e5cb78SSagi Grimberg blk_rq_payload_bytes(rq) : 0; 22813f2304f8SSagi Grimberg req->curr_bio = rq->bio; 2282e11e5116SSagi Grimberg if (req->curr_bio && req->data_len) 2283cb9b870fSSagi Grimberg nvme_tcp_init_iter(req, rq_data_dir(rq)); 22843f2304f8SSagi Grimberg 22853f2304f8SSagi Grimberg if (rq_data_dir(rq) == WRITE && 22863f2304f8SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(queue)) 22873f2304f8SSagi Grimberg req->pdu_len = req->data_len; 22883f2304f8SSagi Grimberg 22893f2304f8SSagi Grimberg pdu->hdr.type = nvme_tcp_cmd; 22903f2304f8SSagi Grimberg pdu->hdr.flags = 0; 22913f2304f8SSagi Grimberg if (queue->hdr_digest) 22923f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_HDGST; 22933f2304f8SSagi Grimberg if (queue->data_digest && req->pdu_len) { 22943f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_DDGST; 22953f2304f8SSagi Grimberg ddgst = nvme_tcp_ddgst_len(queue); 22963f2304f8SSagi Grimberg } 22973f2304f8SSagi Grimberg pdu->hdr.hlen = sizeof(*pdu); 22983f2304f8SSagi Grimberg pdu->hdr.pdo = req->pdu_len ? pdu->hdr.hlen + hdgst : 0; 22993f2304f8SSagi Grimberg pdu->hdr.plen = 23003f2304f8SSagi Grimberg cpu_to_le32(pdu->hdr.hlen + hdgst + req->pdu_len + ddgst); 23013f2304f8SSagi Grimberg 23023f2304f8SSagi Grimberg ret = nvme_tcp_map_data(queue, rq); 23033f2304f8SSagi Grimberg if (unlikely(ret)) { 230428a4cac4SMax Gurtovoy nvme_cleanup_cmd(rq); 23053f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 23063f2304f8SSagi Grimberg "Failed to map data (%d)\n", ret); 23073f2304f8SSagi Grimberg return ret; 23083f2304f8SSagi Grimberg } 23093f2304f8SSagi Grimberg 23103f2304f8SSagi Grimberg return 0; 23113f2304f8SSagi Grimberg } 23123f2304f8SSagi Grimberg 231386f0348aSSagi Grimberg static void nvme_tcp_commit_rqs(struct blk_mq_hw_ctx *hctx) 231486f0348aSSagi Grimberg { 231586f0348aSSagi Grimberg struct nvme_tcp_queue *queue = hctx->driver_data; 231686f0348aSSagi Grimberg 231786f0348aSSagi Grimberg if (!llist_empty(&queue->req_list)) 231886f0348aSSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 231986f0348aSSagi Grimberg } 232086f0348aSSagi Grimberg 23213f2304f8SSagi Grimberg static blk_status_t nvme_tcp_queue_rq(struct blk_mq_hw_ctx *hctx, 23223f2304f8SSagi Grimberg const struct blk_mq_queue_data *bd) 23233f2304f8SSagi Grimberg { 23243f2304f8SSagi Grimberg struct nvme_ns *ns = hctx->queue->queuedata; 23253f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = hctx->driver_data; 23263f2304f8SSagi Grimberg struct request *rq = bd->rq; 23273f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 23283f2304f8SSagi Grimberg bool queue_ready = test_bit(NVME_TCP_Q_LIVE, &queue->flags); 23293f2304f8SSagi Grimberg blk_status_t ret; 23303f2304f8SSagi Grimberg 23313f2304f8SSagi Grimberg if (!nvmf_check_ready(&queue->ctrl->ctrl, rq, queue_ready)) 23323f2304f8SSagi Grimberg return nvmf_fail_nonready_command(&queue->ctrl->ctrl, rq); 23333f2304f8SSagi Grimberg 23343f2304f8SSagi Grimberg ret = nvme_tcp_setup_cmd_pdu(ns, rq); 23353f2304f8SSagi Grimberg if (unlikely(ret)) 23363f2304f8SSagi Grimberg return ret; 23373f2304f8SSagi Grimberg 23383f2304f8SSagi Grimberg blk_mq_start_request(rq); 23393f2304f8SSagi Grimberg 234086f0348aSSagi Grimberg nvme_tcp_queue_request(req, true, bd->last); 23413f2304f8SSagi Grimberg 23423f2304f8SSagi Grimberg return BLK_STS_OK; 23433f2304f8SSagi Grimberg } 23443f2304f8SSagi Grimberg 2345873946f4SSagi Grimberg static int nvme_tcp_map_queues(struct blk_mq_tag_set *set) 2346873946f4SSagi Grimberg { 2347873946f4SSagi Grimberg struct nvme_tcp_ctrl *ctrl = set->driver_data; 234864861993SSagi Grimberg struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 2349873946f4SSagi Grimberg 235064861993SSagi Grimberg if (opts->nr_write_queues && ctrl->io_queues[HCTX_TYPE_READ]) { 2351873946f4SSagi Grimberg /* separate read/write queues */ 2352873946f4SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].nr_queues = 235364861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 235464861993SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; 235564861993SSagi Grimberg set->map[HCTX_TYPE_READ].nr_queues = 235664861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 2357873946f4SSagi Grimberg set->map[HCTX_TYPE_READ].queue_offset = 235864861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 2359873946f4SSagi Grimberg } else { 236064861993SSagi Grimberg /* shared read/write queues */ 2361873946f4SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].nr_queues = 236264861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 236364861993SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; 236464861993SSagi Grimberg set->map[HCTX_TYPE_READ].nr_queues = 236564861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 2366873946f4SSagi Grimberg set->map[HCTX_TYPE_READ].queue_offset = 0; 2367873946f4SSagi Grimberg } 2368873946f4SSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]); 2369873946f4SSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_READ]); 237064861993SSagi Grimberg 23711a9460ceSSagi Grimberg if (opts->nr_poll_queues && ctrl->io_queues[HCTX_TYPE_POLL]) { 23721a9460ceSSagi Grimberg /* map dedicated poll queues only if we have queues left */ 23731a9460ceSSagi Grimberg set->map[HCTX_TYPE_POLL].nr_queues = 23741a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL]; 23751a9460ceSSagi Grimberg set->map[HCTX_TYPE_POLL].queue_offset = 23761a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] + 23771a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 23781a9460ceSSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_POLL]); 23791a9460ceSSagi Grimberg } 23801a9460ceSSagi Grimberg 238164861993SSagi Grimberg dev_info(ctrl->ctrl.device, 23821a9460ceSSagi Grimberg "mapped %d/%d/%d default/read/poll queues.\n", 238364861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT], 23841a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ], 23851a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL]); 238664861993SSagi Grimberg 2387873946f4SSagi Grimberg return 0; 2388873946f4SSagi Grimberg } 2389873946f4SSagi Grimberg 23901a9460ceSSagi Grimberg static int nvme_tcp_poll(struct blk_mq_hw_ctx *hctx) 23911a9460ceSSagi Grimberg { 23921a9460ceSSagi Grimberg struct nvme_tcp_queue *queue = hctx->driver_data; 23931a9460ceSSagi Grimberg struct sock *sk = queue->sock->sk; 23941a9460ceSSagi Grimberg 2395f86e5bf8SSagi Grimberg if (!test_bit(NVME_TCP_Q_LIVE, &queue->flags)) 2396f86e5bf8SSagi Grimberg return 0; 2397f86e5bf8SSagi Grimberg 239872e5d757SSagi Grimberg set_bit(NVME_TCP_Q_POLLING, &queue->flags); 23993f926af3SEric Dumazet if (sk_can_busy_loop(sk) && skb_queue_empty_lockless(&sk->sk_receive_queue)) 24001a9460ceSSagi Grimberg sk_busy_loop(sk, true); 24011a9460ceSSagi Grimberg nvme_tcp_try_recv(queue); 240272e5d757SSagi Grimberg clear_bit(NVME_TCP_Q_POLLING, &queue->flags); 24031a9460ceSSagi Grimberg return queue->nr_cqe; 24041a9460ceSSagi Grimberg } 24051a9460ceSSagi Grimberg 24066acbd961SRikard Falkeborn static const struct blk_mq_ops nvme_tcp_mq_ops = { 24073f2304f8SSagi Grimberg .queue_rq = nvme_tcp_queue_rq, 240886f0348aSSagi Grimberg .commit_rqs = nvme_tcp_commit_rqs, 24093f2304f8SSagi Grimberg .complete = nvme_complete_rq, 24103f2304f8SSagi Grimberg .init_request = nvme_tcp_init_request, 24113f2304f8SSagi Grimberg .exit_request = nvme_tcp_exit_request, 24123f2304f8SSagi Grimberg .init_hctx = nvme_tcp_init_hctx, 24133f2304f8SSagi Grimberg .timeout = nvme_tcp_timeout, 2414873946f4SSagi Grimberg .map_queues = nvme_tcp_map_queues, 24151a9460ceSSagi Grimberg .poll = nvme_tcp_poll, 24163f2304f8SSagi Grimberg }; 24173f2304f8SSagi Grimberg 24186acbd961SRikard Falkeborn static const struct blk_mq_ops nvme_tcp_admin_mq_ops = { 24193f2304f8SSagi Grimberg .queue_rq = nvme_tcp_queue_rq, 24203f2304f8SSagi Grimberg .complete = nvme_complete_rq, 24213f2304f8SSagi Grimberg .init_request = nvme_tcp_init_request, 24223f2304f8SSagi Grimberg .exit_request = nvme_tcp_exit_request, 24233f2304f8SSagi Grimberg .init_hctx = nvme_tcp_init_admin_hctx, 24243f2304f8SSagi Grimberg .timeout = nvme_tcp_timeout, 24253f2304f8SSagi Grimberg }; 24263f2304f8SSagi Grimberg 24273f2304f8SSagi Grimberg static const struct nvme_ctrl_ops nvme_tcp_ctrl_ops = { 24283f2304f8SSagi Grimberg .name = "tcp", 24293f2304f8SSagi Grimberg .module = THIS_MODULE, 24303f2304f8SSagi Grimberg .flags = NVME_F_FABRICS, 24313f2304f8SSagi Grimberg .reg_read32 = nvmf_reg_read32, 24323f2304f8SSagi Grimberg .reg_read64 = nvmf_reg_read64, 24333f2304f8SSagi Grimberg .reg_write32 = nvmf_reg_write32, 24343f2304f8SSagi Grimberg .free_ctrl = nvme_tcp_free_ctrl, 24353f2304f8SSagi Grimberg .submit_async_event = nvme_tcp_submit_async_event, 24363f2304f8SSagi Grimberg .delete_ctrl = nvme_tcp_delete_ctrl, 24373f2304f8SSagi Grimberg .get_address = nvmf_get_address, 24383f2304f8SSagi Grimberg }; 24393f2304f8SSagi Grimberg 24403f2304f8SSagi Grimberg static bool 24413f2304f8SSagi Grimberg nvme_tcp_existing_controller(struct nvmf_ctrl_options *opts) 24423f2304f8SSagi Grimberg { 24433f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 24443f2304f8SSagi Grimberg bool found = false; 24453f2304f8SSagi Grimberg 24463f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 24473f2304f8SSagi Grimberg list_for_each_entry(ctrl, &nvme_tcp_ctrl_list, list) { 24483f2304f8SSagi Grimberg found = nvmf_ip_options_match(&ctrl->ctrl, opts); 24493f2304f8SSagi Grimberg if (found) 24503f2304f8SSagi Grimberg break; 24513f2304f8SSagi Grimberg } 24523f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 24533f2304f8SSagi Grimberg 24543f2304f8SSagi Grimberg return found; 24553f2304f8SSagi Grimberg } 24563f2304f8SSagi Grimberg 24573f2304f8SSagi Grimberg static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev, 24583f2304f8SSagi Grimberg struct nvmf_ctrl_options *opts) 24593f2304f8SSagi Grimberg { 24603f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 24613f2304f8SSagi Grimberg int ret; 24623f2304f8SSagi Grimberg 24633f2304f8SSagi Grimberg ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); 24643f2304f8SSagi Grimberg if (!ctrl) 24653f2304f8SSagi Grimberg return ERR_PTR(-ENOMEM); 24663f2304f8SSagi Grimberg 24673f2304f8SSagi Grimberg INIT_LIST_HEAD(&ctrl->list); 24683f2304f8SSagi Grimberg ctrl->ctrl.opts = opts; 24691a9460ceSSagi Grimberg ctrl->ctrl.queue_count = opts->nr_io_queues + opts->nr_write_queues + 24701a9460ceSSagi Grimberg opts->nr_poll_queues + 1; 24713f2304f8SSagi Grimberg ctrl->ctrl.sqsize = opts->queue_size - 1; 24723f2304f8SSagi Grimberg ctrl->ctrl.kato = opts->kato; 24733f2304f8SSagi Grimberg 24743f2304f8SSagi Grimberg INIT_DELAYED_WORK(&ctrl->connect_work, 24753f2304f8SSagi Grimberg nvme_tcp_reconnect_ctrl_work); 24763f2304f8SSagi Grimberg INIT_WORK(&ctrl->err_work, nvme_tcp_error_recovery_work); 24773f2304f8SSagi Grimberg INIT_WORK(&ctrl->ctrl.reset_work, nvme_reset_ctrl_work); 24783f2304f8SSagi Grimberg 24793f2304f8SSagi Grimberg if (!(opts->mask & NVMF_OPT_TRSVCID)) { 24803f2304f8SSagi Grimberg opts->trsvcid = 24813f2304f8SSagi Grimberg kstrdup(__stringify(NVME_TCP_DISC_PORT), GFP_KERNEL); 24823f2304f8SSagi Grimberg if (!opts->trsvcid) { 24833f2304f8SSagi Grimberg ret = -ENOMEM; 24843f2304f8SSagi Grimberg goto out_free_ctrl; 24853f2304f8SSagi Grimberg } 24863f2304f8SSagi Grimberg opts->mask |= NVMF_OPT_TRSVCID; 24873f2304f8SSagi Grimberg } 24883f2304f8SSagi Grimberg 24893f2304f8SSagi Grimberg ret = inet_pton_with_scope(&init_net, AF_UNSPEC, 24903f2304f8SSagi Grimberg opts->traddr, opts->trsvcid, &ctrl->addr); 24913f2304f8SSagi Grimberg if (ret) { 24923f2304f8SSagi Grimberg pr_err("malformed address passed: %s:%s\n", 24933f2304f8SSagi Grimberg opts->traddr, opts->trsvcid); 24943f2304f8SSagi Grimberg goto out_free_ctrl; 24953f2304f8SSagi Grimberg } 24963f2304f8SSagi Grimberg 24973f2304f8SSagi Grimberg if (opts->mask & NVMF_OPT_HOST_TRADDR) { 24983f2304f8SSagi Grimberg ret = inet_pton_with_scope(&init_net, AF_UNSPEC, 24993f2304f8SSagi Grimberg opts->host_traddr, NULL, &ctrl->src_addr); 25003f2304f8SSagi Grimberg if (ret) { 25013f2304f8SSagi Grimberg pr_err("malformed src address passed: %s\n", 25023f2304f8SSagi Grimberg opts->host_traddr); 25033f2304f8SSagi Grimberg goto out_free_ctrl; 25043f2304f8SSagi Grimberg } 25053f2304f8SSagi Grimberg } 25063f2304f8SSagi Grimberg 25073f2304f8SSagi Grimberg if (!opts->duplicate_connect && nvme_tcp_existing_controller(opts)) { 25083f2304f8SSagi Grimberg ret = -EALREADY; 25093f2304f8SSagi Grimberg goto out_free_ctrl; 25103f2304f8SSagi Grimberg } 25113f2304f8SSagi Grimberg 2512873946f4SSagi Grimberg ctrl->queues = kcalloc(ctrl->ctrl.queue_count, sizeof(*ctrl->queues), 25133f2304f8SSagi Grimberg GFP_KERNEL); 25143f2304f8SSagi Grimberg if (!ctrl->queues) { 25153f2304f8SSagi Grimberg ret = -ENOMEM; 25163f2304f8SSagi Grimberg goto out_free_ctrl; 25173f2304f8SSagi Grimberg } 25183f2304f8SSagi Grimberg 25193f2304f8SSagi Grimberg ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_tcp_ctrl_ops, 0); 25203f2304f8SSagi Grimberg if (ret) 25213f2304f8SSagi Grimberg goto out_kfree_queues; 25223f2304f8SSagi Grimberg 25233f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) { 25243f2304f8SSagi Grimberg WARN_ON_ONCE(1); 25253f2304f8SSagi Grimberg ret = -EINTR; 25263f2304f8SSagi Grimberg goto out_uninit_ctrl; 25273f2304f8SSagi Grimberg } 25283f2304f8SSagi Grimberg 25293f2304f8SSagi Grimberg ret = nvme_tcp_setup_ctrl(&ctrl->ctrl, true); 25303f2304f8SSagi Grimberg if (ret) 25313f2304f8SSagi Grimberg goto out_uninit_ctrl; 25323f2304f8SSagi Grimberg 25333f2304f8SSagi Grimberg dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISp\n", 25343f2304f8SSagi Grimberg ctrl->ctrl.opts->subsysnqn, &ctrl->addr); 25353f2304f8SSagi Grimberg 25363f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 25373f2304f8SSagi Grimberg list_add_tail(&ctrl->list, &nvme_tcp_ctrl_list); 25383f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 25393f2304f8SSagi Grimberg 25403f2304f8SSagi Grimberg return &ctrl->ctrl; 25413f2304f8SSagi Grimberg 25423f2304f8SSagi Grimberg out_uninit_ctrl: 25433f2304f8SSagi Grimberg nvme_uninit_ctrl(&ctrl->ctrl); 25443f2304f8SSagi Grimberg nvme_put_ctrl(&ctrl->ctrl); 25453f2304f8SSagi Grimberg if (ret > 0) 25463f2304f8SSagi Grimberg ret = -EIO; 25473f2304f8SSagi Grimberg return ERR_PTR(ret); 25483f2304f8SSagi Grimberg out_kfree_queues: 25493f2304f8SSagi Grimberg kfree(ctrl->queues); 25503f2304f8SSagi Grimberg out_free_ctrl: 25513f2304f8SSagi Grimberg kfree(ctrl); 25523f2304f8SSagi Grimberg return ERR_PTR(ret); 25533f2304f8SSagi Grimberg } 25543f2304f8SSagi Grimberg 25553f2304f8SSagi Grimberg static struct nvmf_transport_ops nvme_tcp_transport = { 25563f2304f8SSagi Grimberg .name = "tcp", 25573f2304f8SSagi Grimberg .module = THIS_MODULE, 25583f2304f8SSagi Grimberg .required_opts = NVMF_OPT_TRADDR, 25593f2304f8SSagi Grimberg .allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_RECONNECT_DELAY | 25603f2304f8SSagi Grimberg NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO | 2561873946f4SSagi Grimberg NVMF_OPT_HDR_DIGEST | NVMF_OPT_DATA_DIGEST | 2562bb13985dSIsrael Rukshin NVMF_OPT_NR_WRITE_QUEUES | NVMF_OPT_NR_POLL_QUEUES | 2563bb13985dSIsrael Rukshin NVMF_OPT_TOS, 25643f2304f8SSagi Grimberg .create_ctrl = nvme_tcp_create_ctrl, 25653f2304f8SSagi Grimberg }; 25663f2304f8SSagi Grimberg 25673f2304f8SSagi Grimberg static int __init nvme_tcp_init_module(void) 25683f2304f8SSagi Grimberg { 25693f2304f8SSagi Grimberg nvme_tcp_wq = alloc_workqueue("nvme_tcp_wq", 25703f2304f8SSagi Grimberg WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); 25713f2304f8SSagi Grimberg if (!nvme_tcp_wq) 25723f2304f8SSagi Grimberg return -ENOMEM; 25733f2304f8SSagi Grimberg 25743f2304f8SSagi Grimberg nvmf_register_transport(&nvme_tcp_transport); 25753f2304f8SSagi Grimberg return 0; 25763f2304f8SSagi Grimberg } 25773f2304f8SSagi Grimberg 25783f2304f8SSagi Grimberg static void __exit nvme_tcp_cleanup_module(void) 25793f2304f8SSagi Grimberg { 25803f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 25813f2304f8SSagi Grimberg 25823f2304f8SSagi Grimberg nvmf_unregister_transport(&nvme_tcp_transport); 25833f2304f8SSagi Grimberg 25843f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 25853f2304f8SSagi Grimberg list_for_each_entry(ctrl, &nvme_tcp_ctrl_list, list) 25863f2304f8SSagi Grimberg nvme_delete_ctrl(&ctrl->ctrl); 25873f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 25883f2304f8SSagi Grimberg flush_workqueue(nvme_delete_wq); 25893f2304f8SSagi Grimberg 25903f2304f8SSagi Grimberg destroy_workqueue(nvme_tcp_wq); 25913f2304f8SSagi Grimberg } 25923f2304f8SSagi Grimberg 25933f2304f8SSagi Grimberg module_init(nvme_tcp_init_module); 25943f2304f8SSagi Grimberg module_exit(nvme_tcp_cleanup_module); 25953f2304f8SSagi Grimberg 25963f2304f8SSagi Grimberg MODULE_LICENSE("GPL v2"); 2597