1aef9ec39SRoland Dreier /* 2aef9ec39SRoland Dreier * Copyright (c) 2005 Cisco Systems. All rights reserved. 3aef9ec39SRoland Dreier * 4aef9ec39SRoland Dreier * This software is available to you under a choice of one of two 5aef9ec39SRoland Dreier * licenses. You may choose to be licensed under the terms of the GNU 6aef9ec39SRoland Dreier * General Public License (GPL) Version 2, available from the file 7aef9ec39SRoland Dreier * COPYING in the main directory of this source tree, or the 8aef9ec39SRoland Dreier * OpenIB.org BSD license below: 9aef9ec39SRoland Dreier * 10aef9ec39SRoland Dreier * Redistribution and use in source and binary forms, with or 11aef9ec39SRoland Dreier * without modification, are permitted provided that the following 12aef9ec39SRoland Dreier * conditions are met: 13aef9ec39SRoland Dreier * 14aef9ec39SRoland Dreier * - Redistributions of source code must retain the above 15aef9ec39SRoland Dreier * copyright notice, this list of conditions and the following 16aef9ec39SRoland Dreier * disclaimer. 17aef9ec39SRoland Dreier * 18aef9ec39SRoland Dreier * - Redistributions in binary form must reproduce the above 19aef9ec39SRoland Dreier * copyright notice, this list of conditions and the following 20aef9ec39SRoland Dreier * disclaimer in the documentation and/or other materials 21aef9ec39SRoland Dreier * provided with the distribution. 22aef9ec39SRoland Dreier * 23aef9ec39SRoland Dreier * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24aef9ec39SRoland Dreier * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25aef9ec39SRoland Dreier * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26aef9ec39SRoland Dreier * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27aef9ec39SRoland Dreier * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28aef9ec39SRoland Dreier * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29aef9ec39SRoland Dreier * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30aef9ec39SRoland Dreier * SOFTWARE. 31aef9ec39SRoland Dreier */ 32aef9ec39SRoland Dreier 33aef9ec39SRoland Dreier #include <linux/module.h> 34aef9ec39SRoland Dreier #include <linux/init.h> 35aef9ec39SRoland Dreier #include <linux/slab.h> 36aef9ec39SRoland Dreier #include <linux/err.h> 37aef9ec39SRoland Dreier #include <linux/string.h> 38aef9ec39SRoland Dreier #include <linux/parser.h> 39aef9ec39SRoland Dreier #include <linux/random.h> 40de25968cSTim Schmielau #include <linux/jiffies.h> 41aef9ec39SRoland Dreier 42aef9ec39SRoland Dreier #include <asm/atomic.h> 43aef9ec39SRoland Dreier 44aef9ec39SRoland Dreier #include <scsi/scsi.h> 45aef9ec39SRoland Dreier #include <scsi/scsi_device.h> 46aef9ec39SRoland Dreier #include <scsi/scsi_dbg.h> 47aef9ec39SRoland Dreier #include <scsi/srp.h> 483236822bSFUJITA Tomonori #include <scsi/scsi_transport_srp.h> 49aef9ec39SRoland Dreier 50aef9ec39SRoland Dreier #include "ib_srp.h" 51aef9ec39SRoland Dreier 52aef9ec39SRoland Dreier #define DRV_NAME "ib_srp" 53aef9ec39SRoland Dreier #define PFX DRV_NAME ": " 54aef9ec39SRoland Dreier #define DRV_VERSION "0.2" 55aef9ec39SRoland Dreier #define DRV_RELDATE "November 1, 2005" 56aef9ec39SRoland Dreier 57aef9ec39SRoland Dreier MODULE_AUTHOR("Roland Dreier"); 58aef9ec39SRoland Dreier MODULE_DESCRIPTION("InfiniBand SCSI RDMA Protocol initiator " 59aef9ec39SRoland Dreier "v" DRV_VERSION " (" DRV_RELDATE ")"); 60aef9ec39SRoland Dreier MODULE_LICENSE("Dual BSD/GPL"); 61aef9ec39SRoland Dreier 6274b0a15bSVu Pham static int srp_sg_tablesize = SRP_DEF_SG_TABLESIZE; 6374b0a15bSVu Pham static int srp_max_iu_len; 6474b0a15bSVu Pham 6574b0a15bSVu Pham module_param(srp_sg_tablesize, int, 0444); 6674b0a15bSVu Pham MODULE_PARM_DESC(srp_sg_tablesize, 671e89a194SDavid Dillow "Max number of gather/scatter entries per I/O (default is 12, max 255)"); 6874b0a15bSVu Pham 69aef9ec39SRoland Dreier static int topspin_workarounds = 1; 70aef9ec39SRoland Dreier 71aef9ec39SRoland Dreier module_param(topspin_workarounds, int, 0444); 72aef9ec39SRoland Dreier MODULE_PARM_DESC(topspin_workarounds, 73aef9ec39SRoland Dreier "Enable workarounds for Topspin/Cisco SRP target bugs if != 0"); 74aef9ec39SRoland Dreier 75559ce8f1SIshai Rabinovitz static int mellanox_workarounds = 1; 76559ce8f1SIshai Rabinovitz 77559ce8f1SIshai Rabinovitz module_param(mellanox_workarounds, int, 0444); 78559ce8f1SIshai Rabinovitz MODULE_PARM_DESC(mellanox_workarounds, 79559ce8f1SIshai Rabinovitz "Enable workarounds for Mellanox SRP target bugs if != 0"); 80559ce8f1SIshai Rabinovitz 81aef9ec39SRoland Dreier static void srp_add_one(struct ib_device *device); 82aef9ec39SRoland Dreier static void srp_remove_one(struct ib_device *device); 839c03dc9fSBart Van Assche static void srp_recv_completion(struct ib_cq *cq, void *target_ptr); 849c03dc9fSBart Van Assche static void srp_send_completion(struct ib_cq *cq, void *target_ptr); 85aef9ec39SRoland Dreier static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event); 86aef9ec39SRoland Dreier 873236822bSFUJITA Tomonori static struct scsi_transport_template *ib_srp_transport_template; 883236822bSFUJITA Tomonori 89aef9ec39SRoland Dreier static struct ib_client srp_client = { 90aef9ec39SRoland Dreier .name = "srp", 91aef9ec39SRoland Dreier .add = srp_add_one, 92aef9ec39SRoland Dreier .remove = srp_remove_one 93aef9ec39SRoland Dreier }; 94aef9ec39SRoland Dreier 95c1a0b23bSMichael S. Tsirkin static struct ib_sa_client srp_sa_client; 96c1a0b23bSMichael S. Tsirkin 97aef9ec39SRoland Dreier static inline struct srp_target_port *host_to_target(struct Scsi_Host *host) 98aef9ec39SRoland Dreier { 99aef9ec39SRoland Dreier return (struct srp_target_port *) host->hostdata; 100aef9ec39SRoland Dreier } 101aef9ec39SRoland Dreier 102aef9ec39SRoland Dreier static const char *srp_target_info(struct Scsi_Host *host) 103aef9ec39SRoland Dreier { 104aef9ec39SRoland Dreier return host_to_target(host)->target_name; 105aef9ec39SRoland Dreier } 106aef9ec39SRoland Dreier 1075d7cbfd6SRoland Dreier static int srp_target_is_topspin(struct srp_target_port *target) 1085d7cbfd6SRoland Dreier { 1095d7cbfd6SRoland Dreier static const u8 topspin_oui[3] = { 0x00, 0x05, 0xad }; 1103d1ff48dSRaghava Kondapalli static const u8 cisco_oui[3] = { 0x00, 0x1b, 0x0d }; 1115d7cbfd6SRoland Dreier 1125d7cbfd6SRoland Dreier return topspin_workarounds && 1133d1ff48dSRaghava Kondapalli (!memcmp(&target->ioc_guid, topspin_oui, sizeof topspin_oui) || 1143d1ff48dSRaghava Kondapalli !memcmp(&target->ioc_guid, cisco_oui, sizeof cisco_oui)); 1155d7cbfd6SRoland Dreier } 1165d7cbfd6SRoland Dreier 1175d7cbfd6SRoland Dreier static int srp_target_is_mellanox(struct srp_target_port *target) 1185d7cbfd6SRoland Dreier { 1195d7cbfd6SRoland Dreier static const u8 mellanox_oui[3] = { 0x00, 0x02, 0xc9 }; 1205d7cbfd6SRoland Dreier 1215d7cbfd6SRoland Dreier return mellanox_workarounds && 1225d7cbfd6SRoland Dreier !memcmp(&target->ioc_guid, mellanox_oui, sizeof mellanox_oui); 1235d7cbfd6SRoland Dreier } 1245d7cbfd6SRoland Dreier 125aef9ec39SRoland Dreier static struct srp_iu *srp_alloc_iu(struct srp_host *host, size_t size, 126aef9ec39SRoland Dreier gfp_t gfp_mask, 127aef9ec39SRoland Dreier enum dma_data_direction direction) 128aef9ec39SRoland Dreier { 129aef9ec39SRoland Dreier struct srp_iu *iu; 130aef9ec39SRoland Dreier 131aef9ec39SRoland Dreier iu = kmalloc(sizeof *iu, gfp_mask); 132aef9ec39SRoland Dreier if (!iu) 133aef9ec39SRoland Dreier goto out; 134aef9ec39SRoland Dreier 135aef9ec39SRoland Dreier iu->buf = kzalloc(size, gfp_mask); 136aef9ec39SRoland Dreier if (!iu->buf) 137aef9ec39SRoland Dreier goto out_free_iu; 138aef9ec39SRoland Dreier 13905321937SGreg Kroah-Hartman iu->dma = ib_dma_map_single(host->srp_dev->dev, iu->buf, size, 14005321937SGreg Kroah-Hartman direction); 14105321937SGreg Kroah-Hartman if (ib_dma_mapping_error(host->srp_dev->dev, iu->dma)) 142aef9ec39SRoland Dreier goto out_free_buf; 143aef9ec39SRoland Dreier 144aef9ec39SRoland Dreier iu->size = size; 145aef9ec39SRoland Dreier iu->direction = direction; 146aef9ec39SRoland Dreier 147aef9ec39SRoland Dreier return iu; 148aef9ec39SRoland Dreier 149aef9ec39SRoland Dreier out_free_buf: 150aef9ec39SRoland Dreier kfree(iu->buf); 151aef9ec39SRoland Dreier out_free_iu: 152aef9ec39SRoland Dreier kfree(iu); 153aef9ec39SRoland Dreier out: 154aef9ec39SRoland Dreier return NULL; 155aef9ec39SRoland Dreier } 156aef9ec39SRoland Dreier 157aef9ec39SRoland Dreier static void srp_free_iu(struct srp_host *host, struct srp_iu *iu) 158aef9ec39SRoland Dreier { 159aef9ec39SRoland Dreier if (!iu) 160aef9ec39SRoland Dreier return; 161aef9ec39SRoland Dreier 16205321937SGreg Kroah-Hartman ib_dma_unmap_single(host->srp_dev->dev, iu->dma, iu->size, 16305321937SGreg Kroah-Hartman iu->direction); 164aef9ec39SRoland Dreier kfree(iu->buf); 165aef9ec39SRoland Dreier kfree(iu); 166aef9ec39SRoland Dreier } 167aef9ec39SRoland Dreier 168aef9ec39SRoland Dreier static void srp_qp_event(struct ib_event *event, void *context) 169aef9ec39SRoland Dreier { 170aef9ec39SRoland Dreier printk(KERN_ERR PFX "QP event %d\n", event->event); 171aef9ec39SRoland Dreier } 172aef9ec39SRoland Dreier 173aef9ec39SRoland Dreier static int srp_init_qp(struct srp_target_port *target, 174aef9ec39SRoland Dreier struct ib_qp *qp) 175aef9ec39SRoland Dreier { 176aef9ec39SRoland Dreier struct ib_qp_attr *attr; 177aef9ec39SRoland Dreier int ret; 178aef9ec39SRoland Dreier 179aef9ec39SRoland Dreier attr = kmalloc(sizeof *attr, GFP_KERNEL); 180aef9ec39SRoland Dreier if (!attr) 181aef9ec39SRoland Dreier return -ENOMEM; 182aef9ec39SRoland Dreier 183969a60f9SRoland Dreier ret = ib_find_pkey(target->srp_host->srp_dev->dev, 184aef9ec39SRoland Dreier target->srp_host->port, 185aef9ec39SRoland Dreier be16_to_cpu(target->path.pkey), 186aef9ec39SRoland Dreier &attr->pkey_index); 187aef9ec39SRoland Dreier if (ret) 188aef9ec39SRoland Dreier goto out; 189aef9ec39SRoland Dreier 190aef9ec39SRoland Dreier attr->qp_state = IB_QPS_INIT; 191aef9ec39SRoland Dreier attr->qp_access_flags = (IB_ACCESS_REMOTE_READ | 192aef9ec39SRoland Dreier IB_ACCESS_REMOTE_WRITE); 193aef9ec39SRoland Dreier attr->port_num = target->srp_host->port; 194aef9ec39SRoland Dreier 195aef9ec39SRoland Dreier ret = ib_modify_qp(qp, attr, 196aef9ec39SRoland Dreier IB_QP_STATE | 197aef9ec39SRoland Dreier IB_QP_PKEY_INDEX | 198aef9ec39SRoland Dreier IB_QP_ACCESS_FLAGS | 199aef9ec39SRoland Dreier IB_QP_PORT); 200aef9ec39SRoland Dreier 201aef9ec39SRoland Dreier out: 202aef9ec39SRoland Dreier kfree(attr); 203aef9ec39SRoland Dreier return ret; 204aef9ec39SRoland Dreier } 205aef9ec39SRoland Dreier 2069fe4bcf4SDavid Dillow static int srp_new_cm_id(struct srp_target_port *target) 2079fe4bcf4SDavid Dillow { 2089fe4bcf4SDavid Dillow struct ib_cm_id *new_cm_id; 2099fe4bcf4SDavid Dillow 21005321937SGreg Kroah-Hartman new_cm_id = ib_create_cm_id(target->srp_host->srp_dev->dev, 2119fe4bcf4SDavid Dillow srp_cm_handler, target); 2129fe4bcf4SDavid Dillow if (IS_ERR(new_cm_id)) 2139fe4bcf4SDavid Dillow return PTR_ERR(new_cm_id); 2149fe4bcf4SDavid Dillow 2159fe4bcf4SDavid Dillow if (target->cm_id) 2169fe4bcf4SDavid Dillow ib_destroy_cm_id(target->cm_id); 2179fe4bcf4SDavid Dillow target->cm_id = new_cm_id; 2189fe4bcf4SDavid Dillow 2199fe4bcf4SDavid Dillow return 0; 2209fe4bcf4SDavid Dillow } 2219fe4bcf4SDavid Dillow 222aef9ec39SRoland Dreier static int srp_create_target_ib(struct srp_target_port *target) 223aef9ec39SRoland Dreier { 224aef9ec39SRoland Dreier struct ib_qp_init_attr *init_attr; 225aef9ec39SRoland Dreier int ret; 226aef9ec39SRoland Dreier 227aef9ec39SRoland Dreier init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL); 228aef9ec39SRoland Dreier if (!init_attr) 229aef9ec39SRoland Dreier return -ENOMEM; 230aef9ec39SRoland Dreier 2319c03dc9fSBart Van Assche target->recv_cq = ib_create_cq(target->srp_host->srp_dev->dev, 2329c03dc9fSBart Van Assche srp_recv_completion, NULL, target, SRP_RQ_SIZE, 0); 2339c03dc9fSBart Van Assche if (IS_ERR(target->recv_cq)) { 2349c03dc9fSBart Van Assche ret = PTR_ERR(target->recv_cq); 235*da9d2f07SRoland Dreier goto err; 236aef9ec39SRoland Dreier } 237aef9ec39SRoland Dreier 2389c03dc9fSBart Van Assche target->send_cq = ib_create_cq(target->srp_host->srp_dev->dev, 2399c03dc9fSBart Van Assche srp_send_completion, NULL, target, SRP_SQ_SIZE, 0); 2409c03dc9fSBart Van Assche if (IS_ERR(target->send_cq)) { 2419c03dc9fSBart Van Assche ret = PTR_ERR(target->send_cq); 242*da9d2f07SRoland Dreier goto err_recv_cq; 2439c03dc9fSBart Van Assche } 2449c03dc9fSBart Van Assche 2459c03dc9fSBart Van Assche ib_req_notify_cq(target->recv_cq, IB_CQ_NEXT_COMP); 246aef9ec39SRoland Dreier 247aef9ec39SRoland Dreier init_attr->event_handler = srp_qp_event; 248aef9ec39SRoland Dreier init_attr->cap.max_send_wr = SRP_SQ_SIZE; 249aef9ec39SRoland Dreier init_attr->cap.max_recv_wr = SRP_RQ_SIZE; 250aef9ec39SRoland Dreier init_attr->cap.max_recv_sge = 1; 251aef9ec39SRoland Dreier init_attr->cap.max_send_sge = 1; 252aef9ec39SRoland Dreier init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; 253aef9ec39SRoland Dreier init_attr->qp_type = IB_QPT_RC; 2549c03dc9fSBart Van Assche init_attr->send_cq = target->send_cq; 2559c03dc9fSBart Van Assche init_attr->recv_cq = target->recv_cq; 256aef9ec39SRoland Dreier 25705321937SGreg Kroah-Hartman target->qp = ib_create_qp(target->srp_host->srp_dev->pd, init_attr); 258aef9ec39SRoland Dreier if (IS_ERR(target->qp)) { 259aef9ec39SRoland Dreier ret = PTR_ERR(target->qp); 260*da9d2f07SRoland Dreier goto err_send_cq; 261aef9ec39SRoland Dreier } 262aef9ec39SRoland Dreier 263aef9ec39SRoland Dreier ret = srp_init_qp(target, target->qp); 264*da9d2f07SRoland Dreier if (ret) 265*da9d2f07SRoland Dreier goto err_qp; 266aef9ec39SRoland Dreier 267*da9d2f07SRoland Dreier kfree(init_attr); 268*da9d2f07SRoland Dreier return 0; 269*da9d2f07SRoland Dreier 270*da9d2f07SRoland Dreier err_qp: 271*da9d2f07SRoland Dreier ib_destroy_qp(target->qp); 272*da9d2f07SRoland Dreier 273*da9d2f07SRoland Dreier err_send_cq: 274*da9d2f07SRoland Dreier ib_destroy_cq(target->send_cq); 275*da9d2f07SRoland Dreier 276*da9d2f07SRoland Dreier err_recv_cq: 277*da9d2f07SRoland Dreier ib_destroy_cq(target->recv_cq); 278*da9d2f07SRoland Dreier 279*da9d2f07SRoland Dreier err: 280aef9ec39SRoland Dreier kfree(init_attr); 281aef9ec39SRoland Dreier return ret; 282aef9ec39SRoland Dreier } 283aef9ec39SRoland Dreier 284aef9ec39SRoland Dreier static void srp_free_target_ib(struct srp_target_port *target) 285aef9ec39SRoland Dreier { 286aef9ec39SRoland Dreier int i; 287aef9ec39SRoland Dreier 288aef9ec39SRoland Dreier ib_destroy_qp(target->qp); 2899c03dc9fSBart Van Assche ib_destroy_cq(target->send_cq); 2909c03dc9fSBart Van Assche ib_destroy_cq(target->recv_cq); 291aef9ec39SRoland Dreier 292aef9ec39SRoland Dreier for (i = 0; i < SRP_RQ_SIZE; ++i) 293aef9ec39SRoland Dreier srp_free_iu(target->srp_host, target->rx_ring[i]); 294aef9ec39SRoland Dreier for (i = 0; i < SRP_SQ_SIZE + 1; ++i) 295aef9ec39SRoland Dreier srp_free_iu(target->srp_host, target->tx_ring[i]); 296aef9ec39SRoland Dreier } 297aef9ec39SRoland Dreier 298aef9ec39SRoland Dreier static void srp_path_rec_completion(int status, 299aef9ec39SRoland Dreier struct ib_sa_path_rec *pathrec, 300aef9ec39SRoland Dreier void *target_ptr) 301aef9ec39SRoland Dreier { 302aef9ec39SRoland Dreier struct srp_target_port *target = target_ptr; 303aef9ec39SRoland Dreier 304aef9ec39SRoland Dreier target->status = status; 305aef9ec39SRoland Dreier if (status) 3067aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, 3077aa54bd7SDavid Dillow PFX "Got failed path rec status %d\n", status); 308aef9ec39SRoland Dreier else 309aef9ec39SRoland Dreier target->path = *pathrec; 310aef9ec39SRoland Dreier complete(&target->done); 311aef9ec39SRoland Dreier } 312aef9ec39SRoland Dreier 313aef9ec39SRoland Dreier static int srp_lookup_path(struct srp_target_port *target) 314aef9ec39SRoland Dreier { 315aef9ec39SRoland Dreier target->path.numb_path = 1; 316aef9ec39SRoland Dreier 317aef9ec39SRoland Dreier init_completion(&target->done); 318aef9ec39SRoland Dreier 319c1a0b23bSMichael S. Tsirkin target->path_query_id = ib_sa_path_rec_get(&srp_sa_client, 32005321937SGreg Kroah-Hartman target->srp_host->srp_dev->dev, 321aef9ec39SRoland Dreier target->srp_host->port, 322aef9ec39SRoland Dreier &target->path, 323247e020eSSean Hefty IB_SA_PATH_REC_SERVICE_ID | 324aef9ec39SRoland Dreier IB_SA_PATH_REC_DGID | 325aef9ec39SRoland Dreier IB_SA_PATH_REC_SGID | 326aef9ec39SRoland Dreier IB_SA_PATH_REC_NUMB_PATH | 327aef9ec39SRoland Dreier IB_SA_PATH_REC_PKEY, 328aef9ec39SRoland Dreier SRP_PATH_REC_TIMEOUT_MS, 329aef9ec39SRoland Dreier GFP_KERNEL, 330aef9ec39SRoland Dreier srp_path_rec_completion, 331aef9ec39SRoland Dreier target, &target->path_query); 332aef9ec39SRoland Dreier if (target->path_query_id < 0) 333aef9ec39SRoland Dreier return target->path_query_id; 334aef9ec39SRoland Dreier 335aef9ec39SRoland Dreier wait_for_completion(&target->done); 336aef9ec39SRoland Dreier 337aef9ec39SRoland Dreier if (target->status < 0) 3387aa54bd7SDavid Dillow shost_printk(KERN_WARNING, target->scsi_host, 3397aa54bd7SDavid Dillow PFX "Path record query failed\n"); 340aef9ec39SRoland Dreier 341aef9ec39SRoland Dreier return target->status; 342aef9ec39SRoland Dreier } 343aef9ec39SRoland Dreier 344aef9ec39SRoland Dreier static int srp_send_req(struct srp_target_port *target) 345aef9ec39SRoland Dreier { 346aef9ec39SRoland Dreier struct { 347aef9ec39SRoland Dreier struct ib_cm_req_param param; 348aef9ec39SRoland Dreier struct srp_login_req priv; 349aef9ec39SRoland Dreier } *req = NULL; 350aef9ec39SRoland Dreier int status; 351aef9ec39SRoland Dreier 352aef9ec39SRoland Dreier req = kzalloc(sizeof *req, GFP_KERNEL); 353aef9ec39SRoland Dreier if (!req) 354aef9ec39SRoland Dreier return -ENOMEM; 355aef9ec39SRoland Dreier 356aef9ec39SRoland Dreier req->param.primary_path = &target->path; 357aef9ec39SRoland Dreier req->param.alternate_path = NULL; 358aef9ec39SRoland Dreier req->param.service_id = target->service_id; 359aef9ec39SRoland Dreier req->param.qp_num = target->qp->qp_num; 360aef9ec39SRoland Dreier req->param.qp_type = target->qp->qp_type; 361aef9ec39SRoland Dreier req->param.private_data = &req->priv; 362aef9ec39SRoland Dreier req->param.private_data_len = sizeof req->priv; 363aef9ec39SRoland Dreier req->param.flow_control = 1; 364aef9ec39SRoland Dreier 365aef9ec39SRoland Dreier get_random_bytes(&req->param.starting_psn, 4); 366aef9ec39SRoland Dreier req->param.starting_psn &= 0xffffff; 367aef9ec39SRoland Dreier 368aef9ec39SRoland Dreier /* 369aef9ec39SRoland Dreier * Pick some arbitrary defaults here; we could make these 370aef9ec39SRoland Dreier * module parameters if anyone cared about setting them. 371aef9ec39SRoland Dreier */ 372aef9ec39SRoland Dreier req->param.responder_resources = 4; 373aef9ec39SRoland Dreier req->param.remote_cm_response_timeout = 20; 374aef9ec39SRoland Dreier req->param.local_cm_response_timeout = 20; 375aef9ec39SRoland Dreier req->param.retry_count = 7; 376aef9ec39SRoland Dreier req->param.rnr_retry_count = 7; 377aef9ec39SRoland Dreier req->param.max_cm_retries = 15; 378aef9ec39SRoland Dreier 379aef9ec39SRoland Dreier req->priv.opcode = SRP_LOGIN_REQ; 380aef9ec39SRoland Dreier req->priv.tag = 0; 38174b0a15bSVu Pham req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); 382aef9ec39SRoland Dreier req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | 383aef9ec39SRoland Dreier SRP_BUF_FORMAT_INDIRECT); 3840c0450dbSRamachandra K /* 3850c0450dbSRamachandra K * In the published SRP specification (draft rev. 16a), the 3860c0450dbSRamachandra K * port identifier format is 8 bytes of ID extension followed 3870c0450dbSRamachandra K * by 8 bytes of GUID. Older drafts put the two halves in the 3880c0450dbSRamachandra K * opposite order, so that the GUID comes first. 3890c0450dbSRamachandra K * 3900c0450dbSRamachandra K * Targets conforming to these obsolete drafts can be 3910c0450dbSRamachandra K * recognized by the I/O Class they report. 3920c0450dbSRamachandra K */ 3930c0450dbSRamachandra K if (target->io_class == SRP_REV10_IB_IO_CLASS) { 3940c0450dbSRamachandra K memcpy(req->priv.initiator_port_id, 39501cb9bcbSIshai Rabinovitz &target->path.sgid.global.interface_id, 8); 3960c0450dbSRamachandra K memcpy(req->priv.initiator_port_id + 8, 39701cb9bcbSIshai Rabinovitz &target->initiator_ext, 8); 3980c0450dbSRamachandra K memcpy(req->priv.target_port_id, &target->ioc_guid, 8); 3990c0450dbSRamachandra K memcpy(req->priv.target_port_id + 8, &target->id_ext, 8); 4000c0450dbSRamachandra K } else { 4010c0450dbSRamachandra K memcpy(req->priv.initiator_port_id, 40201cb9bcbSIshai Rabinovitz &target->initiator_ext, 8); 40301cb9bcbSIshai Rabinovitz memcpy(req->priv.initiator_port_id + 8, 40401cb9bcbSIshai Rabinovitz &target->path.sgid.global.interface_id, 8); 4050c0450dbSRamachandra K memcpy(req->priv.target_port_id, &target->id_ext, 8); 4060c0450dbSRamachandra K memcpy(req->priv.target_port_id + 8, &target->ioc_guid, 8); 4070c0450dbSRamachandra K } 4080c0450dbSRamachandra K 409aef9ec39SRoland Dreier /* 410aef9ec39SRoland Dreier * Topspin/Cisco SRP targets will reject our login unless we 41101cb9bcbSIshai Rabinovitz * zero out the first 8 bytes of our initiator port ID and set 41201cb9bcbSIshai Rabinovitz * the second 8 bytes to the local node GUID. 413aef9ec39SRoland Dreier */ 4145d7cbfd6SRoland Dreier if (srp_target_is_topspin(target)) { 4157aa54bd7SDavid Dillow shost_printk(KERN_DEBUG, target->scsi_host, 4167aa54bd7SDavid Dillow PFX "Topspin/Cisco initiator port ID workaround " 417aef9ec39SRoland Dreier "activated for target GUID %016llx\n", 418aef9ec39SRoland Dreier (unsigned long long) be64_to_cpu(target->ioc_guid)); 419aef9ec39SRoland Dreier memset(req->priv.initiator_port_id, 0, 8); 42001cb9bcbSIshai Rabinovitz memcpy(req->priv.initiator_port_id + 8, 42105321937SGreg Kroah-Hartman &target->srp_host->srp_dev->dev->node_guid, 8); 422aef9ec39SRoland Dreier } 423aef9ec39SRoland Dreier 424aef9ec39SRoland Dreier status = ib_send_cm_req(target->cm_id, &req->param); 425aef9ec39SRoland Dreier 426aef9ec39SRoland Dreier kfree(req); 427aef9ec39SRoland Dreier 428aef9ec39SRoland Dreier return status; 429aef9ec39SRoland Dreier } 430aef9ec39SRoland Dreier 431aef9ec39SRoland Dreier static void srp_disconnect_target(struct srp_target_port *target) 432aef9ec39SRoland Dreier { 433aef9ec39SRoland Dreier /* XXX should send SRP_I_LOGOUT request */ 434aef9ec39SRoland Dreier 435aef9ec39SRoland Dreier init_completion(&target->done); 436e6581056SRoland Dreier if (ib_send_cm_dreq(target->cm_id, NULL, 0)) { 4377aa54bd7SDavid Dillow shost_printk(KERN_DEBUG, target->scsi_host, 4387aa54bd7SDavid Dillow PFX "Sending CM DREQ failed\n"); 439e6581056SRoland Dreier return; 440e6581056SRoland Dreier } 441aef9ec39SRoland Dreier wait_for_completion(&target->done); 442aef9ec39SRoland Dreier } 443aef9ec39SRoland Dreier 444c4028958SDavid Howells static void srp_remove_work(struct work_struct *work) 445aef9ec39SRoland Dreier { 446c4028958SDavid Howells struct srp_target_port *target = 447c4028958SDavid Howells container_of(work, struct srp_target_port, work); 448aef9ec39SRoland Dreier 449aef9ec39SRoland Dreier spin_lock_irq(target->scsi_host->host_lock); 450aef9ec39SRoland Dreier if (target->state != SRP_TARGET_DEAD) { 451aef9ec39SRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 452aef9ec39SRoland Dreier return; 453aef9ec39SRoland Dreier } 454aef9ec39SRoland Dreier target->state = SRP_TARGET_REMOVED; 455aef9ec39SRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 456aef9ec39SRoland Dreier 457b3589fd4SMatthew Wilcox spin_lock(&target->srp_host->target_lock); 458aef9ec39SRoland Dreier list_del(&target->list); 459b3589fd4SMatthew Wilcox spin_unlock(&target->srp_host->target_lock); 460aef9ec39SRoland Dreier 4613236822bSFUJITA Tomonori srp_remove_host(target->scsi_host); 462aef9ec39SRoland Dreier scsi_remove_host(target->scsi_host); 463aef9ec39SRoland Dreier ib_destroy_cm_id(target->cm_id); 464aef9ec39SRoland Dreier srp_free_target_ib(target); 465aef9ec39SRoland Dreier scsi_host_put(target->scsi_host); 466aef9ec39SRoland Dreier } 467aef9ec39SRoland Dreier 468aef9ec39SRoland Dreier static int srp_connect_target(struct srp_target_port *target) 469aef9ec39SRoland Dreier { 4709fe4bcf4SDavid Dillow int retries = 3; 471aef9ec39SRoland Dreier int ret; 472aef9ec39SRoland Dreier 473aef9ec39SRoland Dreier ret = srp_lookup_path(target); 474aef9ec39SRoland Dreier if (ret) 475aef9ec39SRoland Dreier return ret; 476aef9ec39SRoland Dreier 477aef9ec39SRoland Dreier while (1) { 478aef9ec39SRoland Dreier init_completion(&target->done); 479aef9ec39SRoland Dreier ret = srp_send_req(target); 480aef9ec39SRoland Dreier if (ret) 481aef9ec39SRoland Dreier return ret; 482aef9ec39SRoland Dreier wait_for_completion(&target->done); 483aef9ec39SRoland Dreier 484aef9ec39SRoland Dreier /* 485aef9ec39SRoland Dreier * The CM event handling code will set status to 486aef9ec39SRoland Dreier * SRP_PORT_REDIRECT if we get a port redirect REJ 487aef9ec39SRoland Dreier * back, or SRP_DLID_REDIRECT if we get a lid/qp 488aef9ec39SRoland Dreier * redirect REJ back. 489aef9ec39SRoland Dreier */ 490aef9ec39SRoland Dreier switch (target->status) { 491aef9ec39SRoland Dreier case 0: 492aef9ec39SRoland Dreier return 0; 493aef9ec39SRoland Dreier 494aef9ec39SRoland Dreier case SRP_PORT_REDIRECT: 495aef9ec39SRoland Dreier ret = srp_lookup_path(target); 496aef9ec39SRoland Dreier if (ret) 497aef9ec39SRoland Dreier return ret; 498aef9ec39SRoland Dreier break; 499aef9ec39SRoland Dreier 500aef9ec39SRoland Dreier case SRP_DLID_REDIRECT: 501aef9ec39SRoland Dreier break; 502aef9ec39SRoland Dreier 5039fe4bcf4SDavid Dillow case SRP_STALE_CONN: 5049fe4bcf4SDavid Dillow /* Our current CM id was stale, and is now in timewait. 5059fe4bcf4SDavid Dillow * Try to reconnect with a new one. 5069fe4bcf4SDavid Dillow */ 5079fe4bcf4SDavid Dillow if (!retries-- || srp_new_cm_id(target)) { 5089fe4bcf4SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, PFX 5099fe4bcf4SDavid Dillow "giving up on stale connection\n"); 5109fe4bcf4SDavid Dillow target->status = -ECONNRESET; 5119fe4bcf4SDavid Dillow return target->status; 5129fe4bcf4SDavid Dillow } 5139fe4bcf4SDavid Dillow 5149fe4bcf4SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, PFX 5159fe4bcf4SDavid Dillow "retrying stale connection\n"); 5169fe4bcf4SDavid Dillow break; 5179fe4bcf4SDavid Dillow 518aef9ec39SRoland Dreier default: 519aef9ec39SRoland Dreier return target->status; 520aef9ec39SRoland Dreier } 521aef9ec39SRoland Dreier } 522aef9ec39SRoland Dreier } 523aef9ec39SRoland Dreier 524d945e1dfSRoland Dreier static void srp_unmap_data(struct scsi_cmnd *scmnd, 525d945e1dfSRoland Dreier struct srp_target_port *target, 526d945e1dfSRoland Dreier struct srp_request *req) 527d945e1dfSRoland Dreier { 528bb350d1dSFUJITA Tomonori if (!scsi_sglist(scmnd) || 529d945e1dfSRoland Dreier (scmnd->sc_data_direction != DMA_TO_DEVICE && 530d945e1dfSRoland Dreier scmnd->sc_data_direction != DMA_FROM_DEVICE)) 531d945e1dfSRoland Dreier return; 532d945e1dfSRoland Dreier 533f5358a17SRoland Dreier if (req->fmr) { 534f5358a17SRoland Dreier ib_fmr_pool_unmap(req->fmr); 535f5358a17SRoland Dreier req->fmr = NULL; 536f5358a17SRoland Dreier } 537f5358a17SRoland Dreier 53805321937SGreg Kroah-Hartman ib_dma_unmap_sg(target->srp_host->srp_dev->dev, scsi_sglist(scmnd), 539bb350d1dSFUJITA Tomonori scsi_sg_count(scmnd), scmnd->sc_data_direction); 540d945e1dfSRoland Dreier } 541d945e1dfSRoland Dreier 542526b4caaSIshai Rabinovitz static void srp_remove_req(struct srp_target_port *target, struct srp_request *req) 543526b4caaSIshai Rabinovitz { 544526b4caaSIshai Rabinovitz srp_unmap_data(req->scmnd, target, req); 545526b4caaSIshai Rabinovitz list_move_tail(&req->list, &target->free_reqs); 546526b4caaSIshai Rabinovitz } 547526b4caaSIshai Rabinovitz 548526b4caaSIshai Rabinovitz static void srp_reset_req(struct srp_target_port *target, struct srp_request *req) 549526b4caaSIshai Rabinovitz { 550526b4caaSIshai Rabinovitz req->scmnd->result = DID_RESET << 16; 551526b4caaSIshai Rabinovitz req->scmnd->scsi_done(req->scmnd); 552526b4caaSIshai Rabinovitz srp_remove_req(target, req); 553526b4caaSIshai Rabinovitz } 554526b4caaSIshai Rabinovitz 555aef9ec39SRoland Dreier static int srp_reconnect_target(struct srp_target_port *target) 556aef9ec39SRoland Dreier { 557aef9ec39SRoland Dreier struct ib_qp_attr qp_attr; 558526b4caaSIshai Rabinovitz struct srp_request *req, *tmp; 559aef9ec39SRoland Dreier struct ib_wc wc; 560aef9ec39SRoland Dreier int ret; 561aef9ec39SRoland Dreier 562aef9ec39SRoland Dreier spin_lock_irq(target->scsi_host->host_lock); 563aef9ec39SRoland Dreier if (target->state != SRP_TARGET_LIVE) { 564aef9ec39SRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 565aef9ec39SRoland Dreier return -EAGAIN; 566aef9ec39SRoland Dreier } 567aef9ec39SRoland Dreier target->state = SRP_TARGET_CONNECTING; 568aef9ec39SRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 569aef9ec39SRoland Dreier 570aef9ec39SRoland Dreier srp_disconnect_target(target); 571aef9ec39SRoland Dreier /* 572aef9ec39SRoland Dreier * Now get a new local CM ID so that we avoid confusing the 573aef9ec39SRoland Dreier * target in case things are really fouled up. 574aef9ec39SRoland Dreier */ 5759fe4bcf4SDavid Dillow ret = srp_new_cm_id(target); 5769fe4bcf4SDavid Dillow if (ret) 577aef9ec39SRoland Dreier goto err; 578aef9ec39SRoland Dreier 579aef9ec39SRoland Dreier qp_attr.qp_state = IB_QPS_RESET; 580aef9ec39SRoland Dreier ret = ib_modify_qp(target->qp, &qp_attr, IB_QP_STATE); 581aef9ec39SRoland Dreier if (ret) 582aef9ec39SRoland Dreier goto err; 583aef9ec39SRoland Dreier 584aef9ec39SRoland Dreier ret = srp_init_qp(target, target->qp); 585aef9ec39SRoland Dreier if (ret) 586aef9ec39SRoland Dreier goto err; 587aef9ec39SRoland Dreier 5889c03dc9fSBart Van Assche while (ib_poll_cq(target->recv_cq, 1, &wc) > 0) 5899c03dc9fSBart Van Assche ; /* nothing */ 5909c03dc9fSBart Van Assche while (ib_poll_cq(target->send_cq, 1, &wc) > 0) 591aef9ec39SRoland Dreier ; /* nothing */ 592aef9ec39SRoland Dreier 593d916a8f1SIshai Rabinovitz spin_lock_irq(target->scsi_host->host_lock); 594526b4caaSIshai Rabinovitz list_for_each_entry_safe(req, tmp, &target->req_queue, list) 595526b4caaSIshai Rabinovitz srp_reset_req(target, req); 596d916a8f1SIshai Rabinovitz spin_unlock_irq(target->scsi_host->host_lock); 597aef9ec39SRoland Dreier 598aef9ec39SRoland Dreier target->rx_head = 0; 599aef9ec39SRoland Dreier target->tx_head = 0; 600aef9ec39SRoland Dreier target->tx_tail = 0; 601aef9ec39SRoland Dreier 6021033ff67SIshai Rabinovitz target->qp_in_error = 0; 603aef9ec39SRoland Dreier ret = srp_connect_target(target); 604aef9ec39SRoland Dreier if (ret) 605aef9ec39SRoland Dreier goto err; 606aef9ec39SRoland Dreier 607aef9ec39SRoland Dreier spin_lock_irq(target->scsi_host->host_lock); 608aef9ec39SRoland Dreier if (target->state == SRP_TARGET_CONNECTING) { 609aef9ec39SRoland Dreier ret = 0; 610aef9ec39SRoland Dreier target->state = SRP_TARGET_LIVE; 611aef9ec39SRoland Dreier } else 612aef9ec39SRoland Dreier ret = -EAGAIN; 613aef9ec39SRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 614aef9ec39SRoland Dreier 615aef9ec39SRoland Dreier return ret; 616aef9ec39SRoland Dreier 617aef9ec39SRoland Dreier err: 6187aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, 6197aa54bd7SDavid Dillow PFX "reconnect failed (%d), removing target port.\n", ret); 620aef9ec39SRoland Dreier 621aef9ec39SRoland Dreier /* 622aef9ec39SRoland Dreier * We couldn't reconnect, so kill our target port off. 623aef9ec39SRoland Dreier * However, we have to defer the real removal because we might 624aef9ec39SRoland Dreier * be in the context of the SCSI error handler now, which 625aef9ec39SRoland Dreier * would deadlock if we call scsi_remove_host(). 626aef9ec39SRoland Dreier */ 627aef9ec39SRoland Dreier spin_lock_irq(target->scsi_host->host_lock); 628aef9ec39SRoland Dreier if (target->state == SRP_TARGET_CONNECTING) { 629aef9ec39SRoland Dreier target->state = SRP_TARGET_DEAD; 630c4028958SDavid Howells INIT_WORK(&target->work, srp_remove_work); 631aef9ec39SRoland Dreier schedule_work(&target->work); 632aef9ec39SRoland Dreier } 633aef9ec39SRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 634aef9ec39SRoland Dreier 635aef9ec39SRoland Dreier return ret; 636aef9ec39SRoland Dreier } 637aef9ec39SRoland Dreier 638559ce8f1SIshai Rabinovitz static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat, 639f5358a17SRoland Dreier int sg_cnt, struct srp_request *req, 640f5358a17SRoland Dreier struct srp_direct_buf *buf) 641f5358a17SRoland Dreier { 642f5358a17SRoland Dreier u64 io_addr = 0; 643f5358a17SRoland Dreier u64 *dma_pages; 644f5358a17SRoland Dreier u32 len; 645f5358a17SRoland Dreier int page_cnt; 646f5358a17SRoland Dreier int i, j; 647f5358a17SRoland Dreier int ret; 64805321937SGreg Kroah-Hartman struct srp_device *dev = target->srp_host->srp_dev; 64985507bccSRalph Campbell struct ib_device *ibdev = dev->dev; 650bb350d1dSFUJITA Tomonori struct scatterlist *sg; 651f5358a17SRoland Dreier 652f5358a17SRoland Dreier if (!dev->fmr_pool) 653f5358a17SRoland Dreier return -ENODEV; 654f5358a17SRoland Dreier 6555d7cbfd6SRoland Dreier if (srp_target_is_mellanox(target) && 6565d7cbfd6SRoland Dreier (ib_sg_dma_address(ibdev, &scat[0]) & ~dev->fmr_page_mask)) 657559ce8f1SIshai Rabinovitz return -EINVAL; 658559ce8f1SIshai Rabinovitz 659f5358a17SRoland Dreier len = page_cnt = 0; 660bb350d1dSFUJITA Tomonori scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { 661bb350d1dSFUJITA Tomonori unsigned int dma_len = ib_sg_dma_len(ibdev, sg); 66285507bccSRalph Campbell 663bb350d1dSFUJITA Tomonori if (ib_sg_dma_address(ibdev, sg) & ~dev->fmr_page_mask) { 664f5358a17SRoland Dreier if (i > 0) 665f5358a17SRoland Dreier return -EINVAL; 666f5358a17SRoland Dreier else 667f5358a17SRoland Dreier ++page_cnt; 668f5358a17SRoland Dreier } 669bb350d1dSFUJITA Tomonori if ((ib_sg_dma_address(ibdev, sg) + dma_len) & 670f5358a17SRoland Dreier ~dev->fmr_page_mask) { 671f5358a17SRoland Dreier if (i < sg_cnt - 1) 672f5358a17SRoland Dreier return -EINVAL; 673f5358a17SRoland Dreier else 674f5358a17SRoland Dreier ++page_cnt; 675f5358a17SRoland Dreier } 676f5358a17SRoland Dreier 67785507bccSRalph Campbell len += dma_len; 678f5358a17SRoland Dreier } 679f5358a17SRoland Dreier 680f5358a17SRoland Dreier page_cnt += len >> dev->fmr_page_shift; 681f5358a17SRoland Dreier if (page_cnt > SRP_FMR_SIZE) 682f5358a17SRoland Dreier return -ENOMEM; 683f5358a17SRoland Dreier 684f5358a17SRoland Dreier dma_pages = kmalloc(sizeof (u64) * page_cnt, GFP_ATOMIC); 685f5358a17SRoland Dreier if (!dma_pages) 686f5358a17SRoland Dreier return -ENOMEM; 687f5358a17SRoland Dreier 688f5358a17SRoland Dreier page_cnt = 0; 689bb350d1dSFUJITA Tomonori scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { 690bb350d1dSFUJITA Tomonori unsigned int dma_len = ib_sg_dma_len(ibdev, sg); 69185507bccSRalph Campbell 69285507bccSRalph Campbell for (j = 0; j < dma_len; j += dev->fmr_page_size) 693f5358a17SRoland Dreier dma_pages[page_cnt++] = 694bb350d1dSFUJITA Tomonori (ib_sg_dma_address(ibdev, sg) & 69585507bccSRalph Campbell dev->fmr_page_mask) + j; 69685507bccSRalph Campbell } 697f5358a17SRoland Dreier 698f5358a17SRoland Dreier req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool, 699adfaa888SMichael S. Tsirkin dma_pages, page_cnt, io_addr); 700f5358a17SRoland Dreier if (IS_ERR(req->fmr)) { 701f5358a17SRoland Dreier ret = PTR_ERR(req->fmr); 7026583eb3dSVu Pham req->fmr = NULL; 703f5358a17SRoland Dreier goto out; 704f5358a17SRoland Dreier } 705f5358a17SRoland Dreier 70685507bccSRalph Campbell buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, &scat[0]) & 70785507bccSRalph Campbell ~dev->fmr_page_mask); 708f5358a17SRoland Dreier buf->key = cpu_to_be32(req->fmr->fmr->rkey); 709f5358a17SRoland Dreier buf->len = cpu_to_be32(len); 710f5358a17SRoland Dreier 711f5358a17SRoland Dreier ret = 0; 712f5358a17SRoland Dreier 713f5358a17SRoland Dreier out: 714f5358a17SRoland Dreier kfree(dma_pages); 715f5358a17SRoland Dreier 716f5358a17SRoland Dreier return ret; 717f5358a17SRoland Dreier } 718f5358a17SRoland Dreier 719aef9ec39SRoland Dreier static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target, 720aef9ec39SRoland Dreier struct srp_request *req) 721aef9ec39SRoland Dreier { 722cf368713SRoland Dreier struct scatterlist *scat; 723aef9ec39SRoland Dreier struct srp_cmd *cmd = req->cmd->buf; 724cf368713SRoland Dreier int len, nents, count; 725f5358a17SRoland Dreier u8 fmt = SRP_DATA_DESC_DIRECT; 72685507bccSRalph Campbell struct srp_device *dev; 72785507bccSRalph Campbell struct ib_device *ibdev; 728aef9ec39SRoland Dreier 729bb350d1dSFUJITA Tomonori if (!scsi_sglist(scmnd) || scmnd->sc_data_direction == DMA_NONE) 730aef9ec39SRoland Dreier return sizeof (struct srp_cmd); 731aef9ec39SRoland Dreier 732aef9ec39SRoland Dreier if (scmnd->sc_data_direction != DMA_FROM_DEVICE && 733aef9ec39SRoland Dreier scmnd->sc_data_direction != DMA_TO_DEVICE) { 7347aa54bd7SDavid Dillow shost_printk(KERN_WARNING, target->scsi_host, 7357aa54bd7SDavid Dillow PFX "Unhandled data direction %d\n", 736aef9ec39SRoland Dreier scmnd->sc_data_direction); 737aef9ec39SRoland Dreier return -EINVAL; 738aef9ec39SRoland Dreier } 739aef9ec39SRoland Dreier 740bb350d1dSFUJITA Tomonori nents = scsi_sg_count(scmnd); 741bb350d1dSFUJITA Tomonori scat = scsi_sglist(scmnd); 742aef9ec39SRoland Dreier 74305321937SGreg Kroah-Hartman dev = target->srp_host->srp_dev; 74485507bccSRalph Campbell ibdev = dev->dev; 74585507bccSRalph Campbell 74685507bccSRalph Campbell count = ib_dma_map_sg(ibdev, scat, nents, scmnd->sc_data_direction); 747aef9ec39SRoland Dreier 748aef9ec39SRoland Dreier fmt = SRP_DATA_DESC_DIRECT; 749f5358a17SRoland Dreier len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf); 750f5358a17SRoland Dreier 751f5358a17SRoland Dreier if (count == 1) { 752f5358a17SRoland Dreier /* 753f5358a17SRoland Dreier * The midlayer only generated a single gather/scatter 754f5358a17SRoland Dreier * entry, or DMA mapping coalesced everything to a 755f5358a17SRoland Dreier * single entry. So a direct descriptor along with 756f5358a17SRoland Dreier * the DMA MR suffices. 757f5358a17SRoland Dreier */ 758f5358a17SRoland Dreier struct srp_direct_buf *buf = (void *) cmd->add_data; 759aef9ec39SRoland Dreier 76085507bccSRalph Campbell buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, scat)); 76185507bccSRalph Campbell buf->key = cpu_to_be32(dev->mr->rkey); 76285507bccSRalph Campbell buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat)); 763559ce8f1SIshai Rabinovitz } else if (srp_map_fmr(target, scat, count, req, 764f5358a17SRoland Dreier (void *) cmd->add_data)) { 765f5358a17SRoland Dreier /* 766f5358a17SRoland Dreier * FMR mapping failed, and the scatterlist has more 767f5358a17SRoland Dreier * than one entry. Generate an indirect memory 768f5358a17SRoland Dreier * descriptor. 769f5358a17SRoland Dreier */ 770aef9ec39SRoland Dreier struct srp_indirect_buf *buf = (void *) cmd->add_data; 771bb350d1dSFUJITA Tomonori struct scatterlist *sg; 772aef9ec39SRoland Dreier u32 datalen = 0; 773f5358a17SRoland Dreier int i; 774aef9ec39SRoland Dreier 775aef9ec39SRoland Dreier fmt = SRP_DATA_DESC_INDIRECT; 776f5358a17SRoland Dreier len = sizeof (struct srp_cmd) + 777f5358a17SRoland Dreier sizeof (struct srp_indirect_buf) + 778f5358a17SRoland Dreier count * sizeof (struct srp_direct_buf); 779f5358a17SRoland Dreier 780bb350d1dSFUJITA Tomonori scsi_for_each_sg(scmnd, sg, count, i) { 781bb350d1dSFUJITA Tomonori unsigned int dma_len = ib_sg_dma_len(ibdev, sg); 78285507bccSRalph Campbell 783f5358a17SRoland Dreier buf->desc_list[i].va = 784bb350d1dSFUJITA Tomonori cpu_to_be64(ib_sg_dma_address(ibdev, sg)); 785f5358a17SRoland Dreier buf->desc_list[i].key = 78685507bccSRalph Campbell cpu_to_be32(dev->mr->rkey); 78785507bccSRalph Campbell buf->desc_list[i].len = cpu_to_be32(dma_len); 78885507bccSRalph Campbell datalen += dma_len; 789f5358a17SRoland Dreier } 790aef9ec39SRoland Dreier 791aef9ec39SRoland Dreier if (scmnd->sc_data_direction == DMA_TO_DEVICE) 792cf368713SRoland Dreier cmd->data_out_desc_cnt = count; 793aef9ec39SRoland Dreier else 794cf368713SRoland Dreier cmd->data_in_desc_cnt = count; 795aef9ec39SRoland Dreier 796f5358a17SRoland Dreier buf->table_desc.va = 797f5358a17SRoland Dreier cpu_to_be64(req->cmd->dma + sizeof *cmd + sizeof *buf); 798aef9ec39SRoland Dreier buf->table_desc.key = 79905321937SGreg Kroah-Hartman cpu_to_be32(target->srp_host->srp_dev->mr->rkey); 800aef9ec39SRoland Dreier buf->table_desc.len = 801cf368713SRoland Dreier cpu_to_be32(count * sizeof (struct srp_direct_buf)); 802aef9ec39SRoland Dreier 803aef9ec39SRoland Dreier buf->len = cpu_to_be32(datalen); 804aef9ec39SRoland Dreier } 805aef9ec39SRoland Dreier 806aef9ec39SRoland Dreier if (scmnd->sc_data_direction == DMA_TO_DEVICE) 807aef9ec39SRoland Dreier cmd->buf_fmt = fmt << 4; 808aef9ec39SRoland Dreier else 809aef9ec39SRoland Dreier cmd->buf_fmt = fmt; 810aef9ec39SRoland Dreier 811aef9ec39SRoland Dreier return len; 812aef9ec39SRoland Dreier } 813aef9ec39SRoland Dreier 814aef9ec39SRoland Dreier static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp) 815aef9ec39SRoland Dreier { 816aef9ec39SRoland Dreier struct srp_request *req; 817aef9ec39SRoland Dreier struct scsi_cmnd *scmnd; 818aef9ec39SRoland Dreier unsigned long flags; 819aef9ec39SRoland Dreier s32 delta; 820aef9ec39SRoland Dreier 821aef9ec39SRoland Dreier delta = (s32) be32_to_cpu(rsp->req_lim_delta); 822aef9ec39SRoland Dreier 823aef9ec39SRoland Dreier spin_lock_irqsave(target->scsi_host->host_lock, flags); 824aef9ec39SRoland Dreier 825aef9ec39SRoland Dreier target->req_lim += delta; 826aef9ec39SRoland Dreier 827aef9ec39SRoland Dreier req = &target->req_ring[rsp->tag & ~SRP_TAG_TSK_MGMT]; 828aef9ec39SRoland Dreier 829aef9ec39SRoland Dreier if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) { 830aef9ec39SRoland Dreier if (be32_to_cpu(rsp->resp_data_len) < 4) 831aef9ec39SRoland Dreier req->tsk_status = -1; 832aef9ec39SRoland Dreier else 833aef9ec39SRoland Dreier req->tsk_status = rsp->data[3]; 834aef9ec39SRoland Dreier complete(&req->done); 835aef9ec39SRoland Dreier } else { 836aef9ec39SRoland Dreier scmnd = req->scmnd; 837aef9ec39SRoland Dreier if (!scmnd) 8387aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, 8397aa54bd7SDavid Dillow "Null scmnd for RSP w/tag %016llx\n", 840aef9ec39SRoland Dreier (unsigned long long) rsp->tag); 841aef9ec39SRoland Dreier scmnd->result = rsp->status; 842aef9ec39SRoland Dreier 843aef9ec39SRoland Dreier if (rsp->flags & SRP_RSP_FLAG_SNSVALID) { 844aef9ec39SRoland Dreier memcpy(scmnd->sense_buffer, rsp->data + 845aef9ec39SRoland Dreier be32_to_cpu(rsp->resp_data_len), 846aef9ec39SRoland Dreier min_t(int, be32_to_cpu(rsp->sense_data_len), 847aef9ec39SRoland Dreier SCSI_SENSE_BUFFERSIZE)); 848aef9ec39SRoland Dreier } 849aef9ec39SRoland Dreier 850aef9ec39SRoland Dreier if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER)) 851bb350d1dSFUJITA Tomonori scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt)); 852aef9ec39SRoland Dreier else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER)) 853bb350d1dSFUJITA Tomonori scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt)); 854aef9ec39SRoland Dreier 855aef9ec39SRoland Dreier if (!req->tsk_mgmt) { 856aef9ec39SRoland Dreier scmnd->host_scribble = (void *) -1L; 857aef9ec39SRoland Dreier scmnd->scsi_done(scmnd); 858aef9ec39SRoland Dreier 859d945e1dfSRoland Dreier srp_remove_req(target, req); 860aef9ec39SRoland Dreier } else 861aef9ec39SRoland Dreier req->cmd_done = 1; 862aef9ec39SRoland Dreier } 863aef9ec39SRoland Dreier 864aef9ec39SRoland Dreier spin_unlock_irqrestore(target->scsi_host->host_lock, flags); 865aef9ec39SRoland Dreier } 866aef9ec39SRoland Dreier 867aef9ec39SRoland Dreier static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc) 868aef9ec39SRoland Dreier { 86985507bccSRalph Campbell struct ib_device *dev; 870aef9ec39SRoland Dreier struct srp_iu *iu; 871aef9ec39SRoland Dreier u8 opcode; 872aef9ec39SRoland Dreier 8739c03dc9fSBart Van Assche iu = target->rx_ring[wc->wr_id]; 874aef9ec39SRoland Dreier 87505321937SGreg Kroah-Hartman dev = target->srp_host->srp_dev->dev; 87685507bccSRalph Campbell ib_dma_sync_single_for_cpu(dev, iu->dma, target->max_ti_iu_len, 87785507bccSRalph Campbell DMA_FROM_DEVICE); 878aef9ec39SRoland Dreier 879aef9ec39SRoland Dreier opcode = *(u8 *) iu->buf; 880aef9ec39SRoland Dreier 881aef9ec39SRoland Dreier if (0) { 882aef9ec39SRoland Dreier int i; 883aef9ec39SRoland Dreier 8847aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, 8857aa54bd7SDavid Dillow PFX "recv completion, opcode 0x%02x\n", opcode); 886aef9ec39SRoland Dreier 887aef9ec39SRoland Dreier for (i = 0; i < wc->byte_len; ++i) { 888aef9ec39SRoland Dreier if (i % 8 == 0) 889aef9ec39SRoland Dreier printk(KERN_ERR " [%02x] ", i); 890aef9ec39SRoland Dreier printk(" %02x", ((u8 *) iu->buf)[i]); 891aef9ec39SRoland Dreier if ((i + 1) % 8 == 0) 892aef9ec39SRoland Dreier printk("\n"); 893aef9ec39SRoland Dreier } 894aef9ec39SRoland Dreier 895aef9ec39SRoland Dreier if (wc->byte_len % 8) 896aef9ec39SRoland Dreier printk("\n"); 897aef9ec39SRoland Dreier } 898aef9ec39SRoland Dreier 899aef9ec39SRoland Dreier switch (opcode) { 900aef9ec39SRoland Dreier case SRP_RSP: 901aef9ec39SRoland Dreier srp_process_rsp(target, iu->buf); 902aef9ec39SRoland Dreier break; 903aef9ec39SRoland Dreier 904aef9ec39SRoland Dreier case SRP_T_LOGOUT: 905aef9ec39SRoland Dreier /* XXX Handle target logout */ 9067aa54bd7SDavid Dillow shost_printk(KERN_WARNING, target->scsi_host, 9077aa54bd7SDavid Dillow PFX "Got target logout request\n"); 908aef9ec39SRoland Dreier break; 909aef9ec39SRoland Dreier 910aef9ec39SRoland Dreier default: 9117aa54bd7SDavid Dillow shost_printk(KERN_WARNING, target->scsi_host, 9127aa54bd7SDavid Dillow PFX "Unhandled SRP opcode 0x%02x\n", opcode); 913aef9ec39SRoland Dreier break; 914aef9ec39SRoland Dreier } 915aef9ec39SRoland Dreier 91685507bccSRalph Campbell ib_dma_sync_single_for_device(dev, iu->dma, target->max_ti_iu_len, 91785507bccSRalph Campbell DMA_FROM_DEVICE); 918aef9ec39SRoland Dreier } 919aef9ec39SRoland Dreier 9209c03dc9fSBart Van Assche static void srp_recv_completion(struct ib_cq *cq, void *target_ptr) 921aef9ec39SRoland Dreier { 922aef9ec39SRoland Dreier struct srp_target_port *target = target_ptr; 923aef9ec39SRoland Dreier struct ib_wc wc; 924aef9ec39SRoland Dreier 925aef9ec39SRoland Dreier ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); 926aef9ec39SRoland Dreier while (ib_poll_cq(cq, 1, &wc) > 0) { 927aef9ec39SRoland Dreier if (wc.status) { 9287aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, 9299c03dc9fSBart Van Assche PFX "failed receive status %d\n", 930aef9ec39SRoland Dreier wc.status); 9311033ff67SIshai Rabinovitz target->qp_in_error = 1; 932aef9ec39SRoland Dreier break; 933aef9ec39SRoland Dreier } 934aef9ec39SRoland Dreier 935aef9ec39SRoland Dreier srp_handle_recv(target, &wc); 9369c03dc9fSBart Van Assche } 9379c03dc9fSBart Van Assche } 9389c03dc9fSBart Van Assche 9399c03dc9fSBart Van Assche static void srp_send_completion(struct ib_cq *cq, void *target_ptr) 9409c03dc9fSBart Van Assche { 9419c03dc9fSBart Van Assche struct srp_target_port *target = target_ptr; 9429c03dc9fSBart Van Assche struct ib_wc wc; 9439c03dc9fSBart Van Assche 9449c03dc9fSBart Van Assche while (ib_poll_cq(cq, 1, &wc) > 0) { 9459c03dc9fSBart Van Assche if (wc.status) { 9469c03dc9fSBart Van Assche shost_printk(KERN_ERR, target->scsi_host, 9479c03dc9fSBart Van Assche PFX "failed send status %d\n", 9489c03dc9fSBart Van Assche wc.status); 9499c03dc9fSBart Van Assche target->qp_in_error = 1; 9509c03dc9fSBart Van Assche break; 9519c03dc9fSBart Van Assche } 9529c03dc9fSBart Van Assche 953aef9ec39SRoland Dreier ++target->tx_tail; 954aef9ec39SRoland Dreier } 955aef9ec39SRoland Dreier } 956aef9ec39SRoland Dreier 957aef9ec39SRoland Dreier static int __srp_post_recv(struct srp_target_port *target) 958aef9ec39SRoland Dreier { 959aef9ec39SRoland Dreier struct srp_iu *iu; 960aef9ec39SRoland Dreier struct ib_sge list; 961aef9ec39SRoland Dreier struct ib_recv_wr wr, *bad_wr; 962aef9ec39SRoland Dreier unsigned int next; 963aef9ec39SRoland Dreier int ret; 964aef9ec39SRoland Dreier 965aef9ec39SRoland Dreier next = target->rx_head & (SRP_RQ_SIZE - 1); 9669c03dc9fSBart Van Assche wr.wr_id = next; 967aef9ec39SRoland Dreier iu = target->rx_ring[next]; 968aef9ec39SRoland Dreier 969aef9ec39SRoland Dreier list.addr = iu->dma; 970aef9ec39SRoland Dreier list.length = iu->size; 97105321937SGreg Kroah-Hartman list.lkey = target->srp_host->srp_dev->mr->lkey; 972aef9ec39SRoland Dreier 973aef9ec39SRoland Dreier wr.next = NULL; 974aef9ec39SRoland Dreier wr.sg_list = &list; 975aef9ec39SRoland Dreier wr.num_sge = 1; 976aef9ec39SRoland Dreier 977aef9ec39SRoland Dreier ret = ib_post_recv(target->qp, &wr, &bad_wr); 978aef9ec39SRoland Dreier if (!ret) 979aef9ec39SRoland Dreier ++target->rx_head; 980aef9ec39SRoland Dreier 981aef9ec39SRoland Dreier return ret; 982aef9ec39SRoland Dreier } 983aef9ec39SRoland Dreier 984aef9ec39SRoland Dreier static int srp_post_recv(struct srp_target_port *target) 985aef9ec39SRoland Dreier { 986aef9ec39SRoland Dreier unsigned long flags; 987aef9ec39SRoland Dreier int ret; 988aef9ec39SRoland Dreier 989aef9ec39SRoland Dreier spin_lock_irqsave(target->scsi_host->host_lock, flags); 990aef9ec39SRoland Dreier ret = __srp_post_recv(target); 991aef9ec39SRoland Dreier spin_unlock_irqrestore(target->scsi_host->host_lock, flags); 992aef9ec39SRoland Dreier 993aef9ec39SRoland Dreier return ret; 994aef9ec39SRoland Dreier } 995aef9ec39SRoland Dreier 996aef9ec39SRoland Dreier /* 997aef9ec39SRoland Dreier * Must be called with target->scsi_host->host_lock held to protect 99847f2bce9SRoland Dreier * req_lim and tx_head. Lock cannot be dropped between call here and 99947f2bce9SRoland Dreier * call to __srp_post_send(). 1000aef9ec39SRoland Dreier */ 10018cba2077SDavid Dillow static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target, 10028cba2077SDavid Dillow enum srp_request_type req_type) 1003aef9ec39SRoland Dreier { 10048cba2077SDavid Dillow s32 min = (req_type == SRP_REQ_TASK_MGMT) ? 1 : 2; 10058cba2077SDavid Dillow 10069c03dc9fSBart Van Assche srp_send_completion(target->send_cq, target); 10079c03dc9fSBart Van Assche 1008aef9ec39SRoland Dreier if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) 1009aef9ec39SRoland Dreier return NULL; 1010aef9ec39SRoland Dreier 10118cba2077SDavid Dillow if (target->req_lim < min) { 10126bfa24faSRoland Dreier ++target->zero_req_lim; 10138cba2077SDavid Dillow return NULL; 10148cba2077SDavid Dillow } 101547f2bce9SRoland Dreier 1016aef9ec39SRoland Dreier return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; 1017aef9ec39SRoland Dreier } 1018aef9ec39SRoland Dreier 1019aef9ec39SRoland Dreier /* 1020aef9ec39SRoland Dreier * Must be called with target->scsi_host->host_lock held to protect 1021aef9ec39SRoland Dreier * req_lim and tx_head. 1022aef9ec39SRoland Dreier */ 1023aef9ec39SRoland Dreier static int __srp_post_send(struct srp_target_port *target, 1024aef9ec39SRoland Dreier struct srp_iu *iu, int len) 1025aef9ec39SRoland Dreier { 1026aef9ec39SRoland Dreier struct ib_sge list; 1027aef9ec39SRoland Dreier struct ib_send_wr wr, *bad_wr; 1028aef9ec39SRoland Dreier int ret = 0; 1029aef9ec39SRoland Dreier 1030aef9ec39SRoland Dreier list.addr = iu->dma; 1031aef9ec39SRoland Dreier list.length = len; 103205321937SGreg Kroah-Hartman list.lkey = target->srp_host->srp_dev->mr->lkey; 1033aef9ec39SRoland Dreier 1034aef9ec39SRoland Dreier wr.next = NULL; 1035aef9ec39SRoland Dreier wr.wr_id = target->tx_head & SRP_SQ_SIZE; 1036aef9ec39SRoland Dreier wr.sg_list = &list; 1037aef9ec39SRoland Dreier wr.num_sge = 1; 1038aef9ec39SRoland Dreier wr.opcode = IB_WR_SEND; 1039aef9ec39SRoland Dreier wr.send_flags = IB_SEND_SIGNALED; 1040aef9ec39SRoland Dreier 1041aef9ec39SRoland Dreier ret = ib_post_send(target->qp, &wr, &bad_wr); 1042aef9ec39SRoland Dreier 1043aef9ec39SRoland Dreier if (!ret) { 1044aef9ec39SRoland Dreier ++target->tx_head; 1045aef9ec39SRoland Dreier --target->req_lim; 1046aef9ec39SRoland Dreier } 1047aef9ec39SRoland Dreier 1048aef9ec39SRoland Dreier return ret; 1049aef9ec39SRoland Dreier } 1050aef9ec39SRoland Dreier 1051aef9ec39SRoland Dreier static int srp_queuecommand(struct scsi_cmnd *scmnd, 1052aef9ec39SRoland Dreier void (*done)(struct scsi_cmnd *)) 1053aef9ec39SRoland Dreier { 1054aef9ec39SRoland Dreier struct srp_target_port *target = host_to_target(scmnd->device->host); 1055aef9ec39SRoland Dreier struct srp_request *req; 1056aef9ec39SRoland Dreier struct srp_iu *iu; 1057aef9ec39SRoland Dreier struct srp_cmd *cmd; 105885507bccSRalph Campbell struct ib_device *dev; 1059aef9ec39SRoland Dreier int len; 1060aef9ec39SRoland Dreier 1061aef9ec39SRoland Dreier if (target->state == SRP_TARGET_CONNECTING) 1062aef9ec39SRoland Dreier goto err; 1063aef9ec39SRoland Dreier 1064aef9ec39SRoland Dreier if (target->state == SRP_TARGET_DEAD || 1065aef9ec39SRoland Dreier target->state == SRP_TARGET_REMOVED) { 1066aef9ec39SRoland Dreier scmnd->result = DID_BAD_TARGET << 16; 1067aef9ec39SRoland Dreier done(scmnd); 1068aef9ec39SRoland Dreier return 0; 1069aef9ec39SRoland Dreier } 1070aef9ec39SRoland Dreier 10718cba2077SDavid Dillow iu = __srp_get_tx_iu(target, SRP_REQ_NORMAL); 1072aef9ec39SRoland Dreier if (!iu) 1073aef9ec39SRoland Dreier goto err; 1074aef9ec39SRoland Dreier 107505321937SGreg Kroah-Hartman dev = target->srp_host->srp_dev->dev; 107685507bccSRalph Campbell ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len, 107785507bccSRalph Campbell DMA_TO_DEVICE); 1078aef9ec39SRoland Dreier 1079d945e1dfSRoland Dreier req = list_entry(target->free_reqs.next, struct srp_request, list); 1080aef9ec39SRoland Dreier 1081aef9ec39SRoland Dreier scmnd->scsi_done = done; 1082aef9ec39SRoland Dreier scmnd->result = 0; 1083d945e1dfSRoland Dreier scmnd->host_scribble = (void *) (long) req->index; 1084aef9ec39SRoland Dreier 1085aef9ec39SRoland Dreier cmd = iu->buf; 1086aef9ec39SRoland Dreier memset(cmd, 0, sizeof *cmd); 1087aef9ec39SRoland Dreier 1088aef9ec39SRoland Dreier cmd->opcode = SRP_CMD; 1089aef9ec39SRoland Dreier cmd->lun = cpu_to_be64((u64) scmnd->device->lun << 48); 1090d945e1dfSRoland Dreier cmd->tag = req->index; 1091aef9ec39SRoland Dreier memcpy(cmd->cdb, scmnd->cmnd, scmnd->cmd_len); 1092aef9ec39SRoland Dreier 1093aef9ec39SRoland Dreier req->scmnd = scmnd; 1094aef9ec39SRoland Dreier req->cmd = iu; 1095aef9ec39SRoland Dreier req->cmd_done = 0; 1096aef9ec39SRoland Dreier req->tsk_mgmt = NULL; 1097aef9ec39SRoland Dreier 1098aef9ec39SRoland Dreier len = srp_map_data(scmnd, target, req); 1099aef9ec39SRoland Dreier if (len < 0) { 11007aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, 11017aa54bd7SDavid Dillow PFX "Failed to map data\n"); 1102aef9ec39SRoland Dreier goto err; 1103aef9ec39SRoland Dreier } 1104aef9ec39SRoland Dreier 1105aef9ec39SRoland Dreier if (__srp_post_recv(target)) { 11067aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, PFX "Recv failed\n"); 1107aef9ec39SRoland Dreier goto err_unmap; 1108aef9ec39SRoland Dreier } 1109aef9ec39SRoland Dreier 111085507bccSRalph Campbell ib_dma_sync_single_for_device(dev, iu->dma, srp_max_iu_len, 111185507bccSRalph Campbell DMA_TO_DEVICE); 1112aef9ec39SRoland Dreier 1113aef9ec39SRoland Dreier if (__srp_post_send(target, iu, len)) { 11147aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, PFX "Send failed\n"); 1115aef9ec39SRoland Dreier goto err_unmap; 1116aef9ec39SRoland Dreier } 1117aef9ec39SRoland Dreier 1118d945e1dfSRoland Dreier list_move_tail(&req->list, &target->req_queue); 1119aef9ec39SRoland Dreier 1120aef9ec39SRoland Dreier return 0; 1121aef9ec39SRoland Dreier 1122aef9ec39SRoland Dreier err_unmap: 1123aef9ec39SRoland Dreier srp_unmap_data(scmnd, target, req); 1124aef9ec39SRoland Dreier 1125aef9ec39SRoland Dreier err: 1126aef9ec39SRoland Dreier return SCSI_MLQUEUE_HOST_BUSY; 1127aef9ec39SRoland Dreier } 1128aef9ec39SRoland Dreier 1129aef9ec39SRoland Dreier static int srp_alloc_iu_bufs(struct srp_target_port *target) 1130aef9ec39SRoland Dreier { 1131aef9ec39SRoland Dreier int i; 1132aef9ec39SRoland Dreier 1133aef9ec39SRoland Dreier for (i = 0; i < SRP_RQ_SIZE; ++i) { 1134aef9ec39SRoland Dreier target->rx_ring[i] = srp_alloc_iu(target->srp_host, 1135aef9ec39SRoland Dreier target->max_ti_iu_len, 1136aef9ec39SRoland Dreier GFP_KERNEL, DMA_FROM_DEVICE); 1137aef9ec39SRoland Dreier if (!target->rx_ring[i]) 1138aef9ec39SRoland Dreier goto err; 1139aef9ec39SRoland Dreier } 1140aef9ec39SRoland Dreier 1141aef9ec39SRoland Dreier for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { 1142aef9ec39SRoland Dreier target->tx_ring[i] = srp_alloc_iu(target->srp_host, 114374b0a15bSVu Pham srp_max_iu_len, 1144aef9ec39SRoland Dreier GFP_KERNEL, DMA_TO_DEVICE); 1145aef9ec39SRoland Dreier if (!target->tx_ring[i]) 1146aef9ec39SRoland Dreier goto err; 1147aef9ec39SRoland Dreier } 1148aef9ec39SRoland Dreier 1149aef9ec39SRoland Dreier return 0; 1150aef9ec39SRoland Dreier 1151aef9ec39SRoland Dreier err: 1152aef9ec39SRoland Dreier for (i = 0; i < SRP_RQ_SIZE; ++i) { 1153aef9ec39SRoland Dreier srp_free_iu(target->srp_host, target->rx_ring[i]); 1154aef9ec39SRoland Dreier target->rx_ring[i] = NULL; 1155aef9ec39SRoland Dreier } 1156aef9ec39SRoland Dreier 1157aef9ec39SRoland Dreier for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { 1158aef9ec39SRoland Dreier srp_free_iu(target->srp_host, target->tx_ring[i]); 1159aef9ec39SRoland Dreier target->tx_ring[i] = NULL; 1160aef9ec39SRoland Dreier } 1161aef9ec39SRoland Dreier 1162aef9ec39SRoland Dreier return -ENOMEM; 1163aef9ec39SRoland Dreier } 1164aef9ec39SRoland Dreier 1165aef9ec39SRoland Dreier static void srp_cm_rej_handler(struct ib_cm_id *cm_id, 1166aef9ec39SRoland Dreier struct ib_cm_event *event, 1167aef9ec39SRoland Dreier struct srp_target_port *target) 1168aef9ec39SRoland Dreier { 11697aa54bd7SDavid Dillow struct Scsi_Host *shost = target->scsi_host; 1170aef9ec39SRoland Dreier struct ib_class_port_info *cpi; 1171aef9ec39SRoland Dreier int opcode; 1172aef9ec39SRoland Dreier 1173aef9ec39SRoland Dreier switch (event->param.rej_rcvd.reason) { 1174aef9ec39SRoland Dreier case IB_CM_REJ_PORT_CM_REDIRECT: 1175aef9ec39SRoland Dreier cpi = event->param.rej_rcvd.ari; 1176aef9ec39SRoland Dreier target->path.dlid = cpi->redirect_lid; 1177aef9ec39SRoland Dreier target->path.pkey = cpi->redirect_pkey; 1178aef9ec39SRoland Dreier cm_id->remote_cm_qpn = be32_to_cpu(cpi->redirect_qp) & 0x00ffffff; 1179aef9ec39SRoland Dreier memcpy(target->path.dgid.raw, cpi->redirect_gid, 16); 1180aef9ec39SRoland Dreier 1181aef9ec39SRoland Dreier target->status = target->path.dlid ? 1182aef9ec39SRoland Dreier SRP_DLID_REDIRECT : SRP_PORT_REDIRECT; 1183aef9ec39SRoland Dreier break; 1184aef9ec39SRoland Dreier 1185aef9ec39SRoland Dreier case IB_CM_REJ_PORT_REDIRECT: 11865d7cbfd6SRoland Dreier if (srp_target_is_topspin(target)) { 1187aef9ec39SRoland Dreier /* 1188aef9ec39SRoland Dreier * Topspin/Cisco SRP gateways incorrectly send 1189aef9ec39SRoland Dreier * reject reason code 25 when they mean 24 1190aef9ec39SRoland Dreier * (port redirect). 1191aef9ec39SRoland Dreier */ 1192aef9ec39SRoland Dreier memcpy(target->path.dgid.raw, 1193aef9ec39SRoland Dreier event->param.rej_rcvd.ari, 16); 1194aef9ec39SRoland Dreier 11957aa54bd7SDavid Dillow shost_printk(KERN_DEBUG, shost, 11967aa54bd7SDavid Dillow PFX "Topspin/Cisco redirect to target port GID %016llx%016llx\n", 1197aef9ec39SRoland Dreier (unsigned long long) be64_to_cpu(target->path.dgid.global.subnet_prefix), 1198aef9ec39SRoland Dreier (unsigned long long) be64_to_cpu(target->path.dgid.global.interface_id)); 1199aef9ec39SRoland Dreier 1200aef9ec39SRoland Dreier target->status = SRP_PORT_REDIRECT; 1201aef9ec39SRoland Dreier } else { 12027aa54bd7SDavid Dillow shost_printk(KERN_WARNING, shost, 12037aa54bd7SDavid Dillow " REJ reason: IB_CM_REJ_PORT_REDIRECT\n"); 1204aef9ec39SRoland Dreier target->status = -ECONNRESET; 1205aef9ec39SRoland Dreier } 1206aef9ec39SRoland Dreier break; 1207aef9ec39SRoland Dreier 1208aef9ec39SRoland Dreier case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID: 12097aa54bd7SDavid Dillow shost_printk(KERN_WARNING, shost, 12107aa54bd7SDavid Dillow " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n"); 1211aef9ec39SRoland Dreier target->status = -ECONNRESET; 1212aef9ec39SRoland Dreier break; 1213aef9ec39SRoland Dreier 1214aef9ec39SRoland Dreier case IB_CM_REJ_CONSUMER_DEFINED: 1215aef9ec39SRoland Dreier opcode = *(u8 *) event->private_data; 1216aef9ec39SRoland Dreier if (opcode == SRP_LOGIN_REJ) { 1217aef9ec39SRoland Dreier struct srp_login_rej *rej = event->private_data; 1218aef9ec39SRoland Dreier u32 reason = be32_to_cpu(rej->reason); 1219aef9ec39SRoland Dreier 1220aef9ec39SRoland Dreier if (reason == SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE) 12217aa54bd7SDavid Dillow shost_printk(KERN_WARNING, shost, 12227aa54bd7SDavid Dillow PFX "SRP_LOGIN_REJ: requested max_it_iu_len too large\n"); 1223aef9ec39SRoland Dreier else 12247aa54bd7SDavid Dillow shost_printk(KERN_WARNING, shost, 12257aa54bd7SDavid Dillow PFX "SRP LOGIN REJECTED, reason 0x%08x\n", reason); 1226aef9ec39SRoland Dreier } else 12277aa54bd7SDavid Dillow shost_printk(KERN_WARNING, shost, 12287aa54bd7SDavid Dillow " REJ reason: IB_CM_REJ_CONSUMER_DEFINED," 1229aef9ec39SRoland Dreier " opcode 0x%02x\n", opcode); 1230aef9ec39SRoland Dreier target->status = -ECONNRESET; 1231aef9ec39SRoland Dreier break; 1232aef9ec39SRoland Dreier 12339fe4bcf4SDavid Dillow case IB_CM_REJ_STALE_CONN: 12349fe4bcf4SDavid Dillow shost_printk(KERN_WARNING, shost, " REJ reason: stale connection\n"); 12359fe4bcf4SDavid Dillow target->status = SRP_STALE_CONN; 12369fe4bcf4SDavid Dillow break; 12379fe4bcf4SDavid Dillow 1238aef9ec39SRoland Dreier default: 12397aa54bd7SDavid Dillow shost_printk(KERN_WARNING, shost, " REJ reason 0x%x\n", 1240aef9ec39SRoland Dreier event->param.rej_rcvd.reason); 1241aef9ec39SRoland Dreier target->status = -ECONNRESET; 1242aef9ec39SRoland Dreier } 1243aef9ec39SRoland Dreier } 1244aef9ec39SRoland Dreier 1245aef9ec39SRoland Dreier static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) 1246aef9ec39SRoland Dreier { 1247aef9ec39SRoland Dreier struct srp_target_port *target = cm_id->context; 1248aef9ec39SRoland Dreier struct ib_qp_attr *qp_attr = NULL; 1249aef9ec39SRoland Dreier int attr_mask = 0; 1250aef9ec39SRoland Dreier int comp = 0; 1251aef9ec39SRoland Dreier int opcode = 0; 1252aef9ec39SRoland Dreier 1253aef9ec39SRoland Dreier switch (event->event) { 1254aef9ec39SRoland Dreier case IB_CM_REQ_ERROR: 12557aa54bd7SDavid Dillow shost_printk(KERN_DEBUG, target->scsi_host, 12567aa54bd7SDavid Dillow PFX "Sending CM REQ failed\n"); 1257aef9ec39SRoland Dreier comp = 1; 1258aef9ec39SRoland Dreier target->status = -ECONNRESET; 1259aef9ec39SRoland Dreier break; 1260aef9ec39SRoland Dreier 1261aef9ec39SRoland Dreier case IB_CM_REP_RECEIVED: 1262aef9ec39SRoland Dreier comp = 1; 1263aef9ec39SRoland Dreier opcode = *(u8 *) event->private_data; 1264aef9ec39SRoland Dreier 1265aef9ec39SRoland Dreier if (opcode == SRP_LOGIN_RSP) { 1266aef9ec39SRoland Dreier struct srp_login_rsp *rsp = event->private_data; 1267aef9ec39SRoland Dreier 1268aef9ec39SRoland Dreier target->max_ti_iu_len = be32_to_cpu(rsp->max_ti_iu_len); 1269aef9ec39SRoland Dreier target->req_lim = be32_to_cpu(rsp->req_lim_delta); 1270aef9ec39SRoland Dreier 1271aef9ec39SRoland Dreier target->scsi_host->can_queue = min(target->req_lim, 1272aef9ec39SRoland Dreier target->scsi_host->can_queue); 1273aef9ec39SRoland Dreier } else { 12747aa54bd7SDavid Dillow shost_printk(KERN_WARNING, target->scsi_host, 12757aa54bd7SDavid Dillow PFX "Unhandled RSP opcode %#x\n", opcode); 1276aef9ec39SRoland Dreier target->status = -ECONNRESET; 1277aef9ec39SRoland Dreier break; 1278aef9ec39SRoland Dreier } 1279aef9ec39SRoland Dreier 1280d2fcea7dSVu Pham if (!target->rx_ring[0]) { 1281aef9ec39SRoland Dreier target->status = srp_alloc_iu_bufs(target); 1282aef9ec39SRoland Dreier if (target->status) 1283aef9ec39SRoland Dreier break; 1284d2fcea7dSVu Pham } 1285aef9ec39SRoland Dreier 1286aef9ec39SRoland Dreier qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); 1287aef9ec39SRoland Dreier if (!qp_attr) { 1288aef9ec39SRoland Dreier target->status = -ENOMEM; 1289aef9ec39SRoland Dreier break; 1290aef9ec39SRoland Dreier } 1291aef9ec39SRoland Dreier 1292aef9ec39SRoland Dreier qp_attr->qp_state = IB_QPS_RTR; 1293aef9ec39SRoland Dreier target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); 1294aef9ec39SRoland Dreier if (target->status) 1295aef9ec39SRoland Dreier break; 1296aef9ec39SRoland Dreier 1297aef9ec39SRoland Dreier target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); 1298aef9ec39SRoland Dreier if (target->status) 1299aef9ec39SRoland Dreier break; 1300aef9ec39SRoland Dreier 1301aef9ec39SRoland Dreier target->status = srp_post_recv(target); 1302aef9ec39SRoland Dreier if (target->status) 1303aef9ec39SRoland Dreier break; 1304aef9ec39SRoland Dreier 1305aef9ec39SRoland Dreier qp_attr->qp_state = IB_QPS_RTS; 1306aef9ec39SRoland Dreier target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); 1307aef9ec39SRoland Dreier if (target->status) 1308aef9ec39SRoland Dreier break; 1309aef9ec39SRoland Dreier 1310aef9ec39SRoland Dreier target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); 1311aef9ec39SRoland Dreier if (target->status) 1312aef9ec39SRoland Dreier break; 1313aef9ec39SRoland Dreier 1314aef9ec39SRoland Dreier target->status = ib_send_cm_rtu(cm_id, NULL, 0); 1315aef9ec39SRoland Dreier if (target->status) 1316aef9ec39SRoland Dreier break; 1317aef9ec39SRoland Dreier 1318aef9ec39SRoland Dreier break; 1319aef9ec39SRoland Dreier 1320aef9ec39SRoland Dreier case IB_CM_REJ_RECEIVED: 13217aa54bd7SDavid Dillow shost_printk(KERN_DEBUG, target->scsi_host, PFX "REJ received\n"); 1322aef9ec39SRoland Dreier comp = 1; 1323aef9ec39SRoland Dreier 1324aef9ec39SRoland Dreier srp_cm_rej_handler(cm_id, event, target); 1325aef9ec39SRoland Dreier break; 1326aef9ec39SRoland Dreier 1327b7ac4ab4SIshai Rabinovitz case IB_CM_DREQ_RECEIVED: 13287aa54bd7SDavid Dillow shost_printk(KERN_WARNING, target->scsi_host, 13297aa54bd7SDavid Dillow PFX "DREQ received - connection closed\n"); 1330b7ac4ab4SIshai Rabinovitz if (ib_send_cm_drep(cm_id, NULL, 0)) 13317aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, 13327aa54bd7SDavid Dillow PFX "Sending CM DREP failed\n"); 1333aef9ec39SRoland Dreier break; 1334aef9ec39SRoland Dreier 1335aef9ec39SRoland Dreier case IB_CM_TIMEWAIT_EXIT: 13367aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, 13377aa54bd7SDavid Dillow PFX "connection closed\n"); 1338aef9ec39SRoland Dreier 1339aef9ec39SRoland Dreier comp = 1; 1340aef9ec39SRoland Dreier target->status = 0; 1341aef9ec39SRoland Dreier break; 1342aef9ec39SRoland Dreier 1343b7ac4ab4SIshai Rabinovitz case IB_CM_MRA_RECEIVED: 1344b7ac4ab4SIshai Rabinovitz case IB_CM_DREQ_ERROR: 1345b7ac4ab4SIshai Rabinovitz case IB_CM_DREP_RECEIVED: 1346b7ac4ab4SIshai Rabinovitz break; 1347b7ac4ab4SIshai Rabinovitz 1348aef9ec39SRoland Dreier default: 13497aa54bd7SDavid Dillow shost_printk(KERN_WARNING, target->scsi_host, 13507aa54bd7SDavid Dillow PFX "Unhandled CM event %d\n", event->event); 1351aef9ec39SRoland Dreier break; 1352aef9ec39SRoland Dreier } 1353aef9ec39SRoland Dreier 1354aef9ec39SRoland Dreier if (comp) 1355aef9ec39SRoland Dreier complete(&target->done); 1356aef9ec39SRoland Dreier 1357aef9ec39SRoland Dreier kfree(qp_attr); 1358aef9ec39SRoland Dreier 1359aef9ec39SRoland Dreier return 0; 1360aef9ec39SRoland Dreier } 1361aef9ec39SRoland Dreier 1362d945e1dfSRoland Dreier static int srp_send_tsk_mgmt(struct srp_target_port *target, 1363d945e1dfSRoland Dreier struct srp_request *req, u8 func) 1364aef9ec39SRoland Dreier { 1365aef9ec39SRoland Dreier struct srp_iu *iu; 1366aef9ec39SRoland Dreier struct srp_tsk_mgmt *tsk_mgmt; 1367aef9ec39SRoland Dreier 1368aef9ec39SRoland Dreier spin_lock_irq(target->scsi_host->host_lock); 1369aef9ec39SRoland Dreier 13701285b3a0SRoland Dreier if (target->state == SRP_TARGET_DEAD || 13711285b3a0SRoland Dreier target->state == SRP_TARGET_REMOVED) { 1372d945e1dfSRoland Dreier req->scmnd->result = DID_BAD_TARGET << 16; 13731285b3a0SRoland Dreier goto out; 13741285b3a0SRoland Dreier } 13751285b3a0SRoland Dreier 1376aef9ec39SRoland Dreier init_completion(&req->done); 1377aef9ec39SRoland Dreier 13788cba2077SDavid Dillow iu = __srp_get_tx_iu(target, SRP_REQ_TASK_MGMT); 1379aef9ec39SRoland Dreier if (!iu) 1380aef9ec39SRoland Dreier goto out; 1381aef9ec39SRoland Dreier 1382aef9ec39SRoland Dreier tsk_mgmt = iu->buf; 1383aef9ec39SRoland Dreier memset(tsk_mgmt, 0, sizeof *tsk_mgmt); 1384aef9ec39SRoland Dreier 1385aef9ec39SRoland Dreier tsk_mgmt->opcode = SRP_TSK_MGMT; 1386d945e1dfSRoland Dreier tsk_mgmt->lun = cpu_to_be64((u64) req->scmnd->device->lun << 48); 1387d945e1dfSRoland Dreier tsk_mgmt->tag = req->index | SRP_TAG_TSK_MGMT; 1388aef9ec39SRoland Dreier tsk_mgmt->tsk_mgmt_func = func; 1389d945e1dfSRoland Dreier tsk_mgmt->task_tag = req->index; 1390aef9ec39SRoland Dreier 1391aef9ec39SRoland Dreier if (__srp_post_send(target, iu, sizeof *tsk_mgmt)) 1392aef9ec39SRoland Dreier goto out; 1393aef9ec39SRoland Dreier 1394aef9ec39SRoland Dreier req->tsk_mgmt = iu; 1395aef9ec39SRoland Dreier 1396aef9ec39SRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 1397d945e1dfSRoland Dreier 1398aef9ec39SRoland Dreier if (!wait_for_completion_timeout(&req->done, 1399aef9ec39SRoland Dreier msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS))) 1400d945e1dfSRoland Dreier return -1; 1401aef9ec39SRoland Dreier 1402d945e1dfSRoland Dreier return 0; 1403aef9ec39SRoland Dreier 1404aef9ec39SRoland Dreier out: 1405aef9ec39SRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 1406d945e1dfSRoland Dreier return -1; 1407d945e1dfSRoland Dreier } 1408d945e1dfSRoland Dreier 1409d945e1dfSRoland Dreier static int srp_find_req(struct srp_target_port *target, 1410d945e1dfSRoland Dreier struct scsi_cmnd *scmnd, 1411d945e1dfSRoland Dreier struct srp_request **req) 1412d945e1dfSRoland Dreier { 1413d945e1dfSRoland Dreier if (scmnd->host_scribble == (void *) -1L) 1414d945e1dfSRoland Dreier return -1; 1415d945e1dfSRoland Dreier 1416d945e1dfSRoland Dreier *req = &target->req_ring[(long) scmnd->host_scribble]; 1417d945e1dfSRoland Dreier 1418d945e1dfSRoland Dreier return 0; 1419aef9ec39SRoland Dreier } 1420aef9ec39SRoland Dreier 1421aef9ec39SRoland Dreier static int srp_abort(struct scsi_cmnd *scmnd) 1422aef9ec39SRoland Dreier { 1423d945e1dfSRoland Dreier struct srp_target_port *target = host_to_target(scmnd->device->host); 1424d945e1dfSRoland Dreier struct srp_request *req; 1425d945e1dfSRoland Dreier int ret = SUCCESS; 1426d945e1dfSRoland Dreier 14277aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, "SRP abort called\n"); 1428aef9ec39SRoland Dreier 14291033ff67SIshai Rabinovitz if (target->qp_in_error) 14301033ff67SIshai Rabinovitz return FAILED; 1431d945e1dfSRoland Dreier if (srp_find_req(target, scmnd, &req)) 1432d945e1dfSRoland Dreier return FAILED; 1433d945e1dfSRoland Dreier if (srp_send_tsk_mgmt(target, req, SRP_TSK_ABORT_TASK)) 1434d945e1dfSRoland Dreier return FAILED; 1435d945e1dfSRoland Dreier 1436d945e1dfSRoland Dreier spin_lock_irq(target->scsi_host->host_lock); 1437d945e1dfSRoland Dreier 1438d945e1dfSRoland Dreier if (req->cmd_done) { 1439d945e1dfSRoland Dreier srp_remove_req(target, req); 1440d945e1dfSRoland Dreier scmnd->scsi_done(scmnd); 1441d945e1dfSRoland Dreier } else if (!req->tsk_status) { 1442d945e1dfSRoland Dreier srp_remove_req(target, req); 1443d945e1dfSRoland Dreier scmnd->result = DID_ABORT << 16; 1444d945e1dfSRoland Dreier } else 1445d945e1dfSRoland Dreier ret = FAILED; 1446d945e1dfSRoland Dreier 1447d945e1dfSRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 1448d945e1dfSRoland Dreier 1449d945e1dfSRoland Dreier return ret; 1450aef9ec39SRoland Dreier } 1451aef9ec39SRoland Dreier 1452aef9ec39SRoland Dreier static int srp_reset_device(struct scsi_cmnd *scmnd) 1453aef9ec39SRoland Dreier { 1454d945e1dfSRoland Dreier struct srp_target_port *target = host_to_target(scmnd->device->host); 1455d945e1dfSRoland Dreier struct srp_request *req, *tmp; 1456d945e1dfSRoland Dreier 14577aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, "SRP reset_device called\n"); 1458aef9ec39SRoland Dreier 14591033ff67SIshai Rabinovitz if (target->qp_in_error) 14601033ff67SIshai Rabinovitz return FAILED; 1461d945e1dfSRoland Dreier if (srp_find_req(target, scmnd, &req)) 1462d945e1dfSRoland Dreier return FAILED; 1463d945e1dfSRoland Dreier if (srp_send_tsk_mgmt(target, req, SRP_TSK_LUN_RESET)) 1464d945e1dfSRoland Dreier return FAILED; 1465d945e1dfSRoland Dreier if (req->tsk_status) 1466d945e1dfSRoland Dreier return FAILED; 1467d945e1dfSRoland Dreier 1468d945e1dfSRoland Dreier spin_lock_irq(target->scsi_host->host_lock); 1469d945e1dfSRoland Dreier 1470d945e1dfSRoland Dreier list_for_each_entry_safe(req, tmp, &target->req_queue, list) 1471526b4caaSIshai Rabinovitz if (req->scmnd->device == scmnd->device) 1472526b4caaSIshai Rabinovitz srp_reset_req(target, req); 1473d945e1dfSRoland Dreier 1474d945e1dfSRoland Dreier spin_unlock_irq(target->scsi_host->host_lock); 1475d945e1dfSRoland Dreier 1476d945e1dfSRoland Dreier return SUCCESS; 1477aef9ec39SRoland Dreier } 1478aef9ec39SRoland Dreier 1479aef9ec39SRoland Dreier static int srp_reset_host(struct scsi_cmnd *scmnd) 1480aef9ec39SRoland Dreier { 1481aef9ec39SRoland Dreier struct srp_target_port *target = host_to_target(scmnd->device->host); 1482aef9ec39SRoland Dreier int ret = FAILED; 1483aef9ec39SRoland Dreier 14847aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, PFX "SRP reset_host called\n"); 1485aef9ec39SRoland Dreier 1486aef9ec39SRoland Dreier if (!srp_reconnect_target(target)) 1487aef9ec39SRoland Dreier ret = SUCCESS; 1488aef9ec39SRoland Dreier 1489aef9ec39SRoland Dreier return ret; 1490aef9ec39SRoland Dreier } 1491aef9ec39SRoland Dreier 1492ee959b00STony Jones static ssize_t show_id_ext(struct device *dev, struct device_attribute *attr, 1493ee959b00STony Jones char *buf) 14946ecb0c84SRoland Dreier { 1495ee959b00STony Jones struct srp_target_port *target = host_to_target(class_to_shost(dev)); 14966ecb0c84SRoland Dreier 14976ecb0c84SRoland Dreier if (target->state == SRP_TARGET_DEAD || 14986ecb0c84SRoland Dreier target->state == SRP_TARGET_REMOVED) 14996ecb0c84SRoland Dreier return -ENODEV; 15006ecb0c84SRoland Dreier 15016ecb0c84SRoland Dreier return sprintf(buf, "0x%016llx\n", 15026ecb0c84SRoland Dreier (unsigned long long) be64_to_cpu(target->id_ext)); 15036ecb0c84SRoland Dreier } 15046ecb0c84SRoland Dreier 1505ee959b00STony Jones static ssize_t show_ioc_guid(struct device *dev, struct device_attribute *attr, 1506ee959b00STony Jones char *buf) 15076ecb0c84SRoland Dreier { 1508ee959b00STony Jones struct srp_target_port *target = host_to_target(class_to_shost(dev)); 15096ecb0c84SRoland Dreier 15106ecb0c84SRoland Dreier if (target->state == SRP_TARGET_DEAD || 15116ecb0c84SRoland Dreier target->state == SRP_TARGET_REMOVED) 15126ecb0c84SRoland Dreier return -ENODEV; 15136ecb0c84SRoland Dreier 15146ecb0c84SRoland Dreier return sprintf(buf, "0x%016llx\n", 15156ecb0c84SRoland Dreier (unsigned long long) be64_to_cpu(target->ioc_guid)); 15166ecb0c84SRoland Dreier } 15176ecb0c84SRoland Dreier 1518ee959b00STony Jones static ssize_t show_service_id(struct device *dev, 1519ee959b00STony Jones struct device_attribute *attr, char *buf) 15206ecb0c84SRoland Dreier { 1521ee959b00STony Jones struct srp_target_port *target = host_to_target(class_to_shost(dev)); 15226ecb0c84SRoland Dreier 15236ecb0c84SRoland Dreier if (target->state == SRP_TARGET_DEAD || 15246ecb0c84SRoland Dreier target->state == SRP_TARGET_REMOVED) 15256ecb0c84SRoland Dreier return -ENODEV; 15266ecb0c84SRoland Dreier 15276ecb0c84SRoland Dreier return sprintf(buf, "0x%016llx\n", 15286ecb0c84SRoland Dreier (unsigned long long) be64_to_cpu(target->service_id)); 15296ecb0c84SRoland Dreier } 15306ecb0c84SRoland Dreier 1531ee959b00STony Jones static ssize_t show_pkey(struct device *dev, struct device_attribute *attr, 1532ee959b00STony Jones char *buf) 15336ecb0c84SRoland Dreier { 1534ee959b00STony Jones struct srp_target_port *target = host_to_target(class_to_shost(dev)); 15356ecb0c84SRoland Dreier 15366ecb0c84SRoland Dreier if (target->state == SRP_TARGET_DEAD || 15376ecb0c84SRoland Dreier target->state == SRP_TARGET_REMOVED) 15386ecb0c84SRoland Dreier return -ENODEV; 15396ecb0c84SRoland Dreier 15406ecb0c84SRoland Dreier return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey)); 15416ecb0c84SRoland Dreier } 15426ecb0c84SRoland Dreier 1543ee959b00STony Jones static ssize_t show_dgid(struct device *dev, struct device_attribute *attr, 1544ee959b00STony Jones char *buf) 15456ecb0c84SRoland Dreier { 1546ee959b00STony Jones struct srp_target_port *target = host_to_target(class_to_shost(dev)); 15476ecb0c84SRoland Dreier 15486ecb0c84SRoland Dreier if (target->state == SRP_TARGET_DEAD || 15496ecb0c84SRoland Dreier target->state == SRP_TARGET_REMOVED) 15506ecb0c84SRoland Dreier return -ENODEV; 15516ecb0c84SRoland Dreier 15525b095d98SHarvey Harrison return sprintf(buf, "%pI6\n", target->path.dgid.raw); 15536ecb0c84SRoland Dreier } 15546ecb0c84SRoland Dreier 1555ee959b00STony Jones static ssize_t show_orig_dgid(struct device *dev, 1556ee959b00STony Jones struct device_attribute *attr, char *buf) 15573633b3d0SIshai Rabinovitz { 1558ee959b00STony Jones struct srp_target_port *target = host_to_target(class_to_shost(dev)); 15593633b3d0SIshai Rabinovitz 15603633b3d0SIshai Rabinovitz if (target->state == SRP_TARGET_DEAD || 15613633b3d0SIshai Rabinovitz target->state == SRP_TARGET_REMOVED) 15623633b3d0SIshai Rabinovitz return -ENODEV; 15633633b3d0SIshai Rabinovitz 15645b095d98SHarvey Harrison return sprintf(buf, "%pI6\n", target->orig_dgid); 15653633b3d0SIshai Rabinovitz } 15663633b3d0SIshai Rabinovitz 1567ee959b00STony Jones static ssize_t show_zero_req_lim(struct device *dev, 1568ee959b00STony Jones struct device_attribute *attr, char *buf) 15696bfa24faSRoland Dreier { 1570ee959b00STony Jones struct srp_target_port *target = host_to_target(class_to_shost(dev)); 15716bfa24faSRoland Dreier 15726bfa24faSRoland Dreier if (target->state == SRP_TARGET_DEAD || 15736bfa24faSRoland Dreier target->state == SRP_TARGET_REMOVED) 15746bfa24faSRoland Dreier return -ENODEV; 15756bfa24faSRoland Dreier 15766bfa24faSRoland Dreier return sprintf(buf, "%d\n", target->zero_req_lim); 15776bfa24faSRoland Dreier } 15786bfa24faSRoland Dreier 1579ee959b00STony Jones static ssize_t show_local_ib_port(struct device *dev, 1580ee959b00STony Jones struct device_attribute *attr, char *buf) 1581ded7f1a1SIshai Rabinovitz { 1582ee959b00STony Jones struct srp_target_port *target = host_to_target(class_to_shost(dev)); 1583ded7f1a1SIshai Rabinovitz 1584ded7f1a1SIshai Rabinovitz return sprintf(buf, "%d\n", target->srp_host->port); 1585ded7f1a1SIshai Rabinovitz } 1586ded7f1a1SIshai Rabinovitz 1587ee959b00STony Jones static ssize_t show_local_ib_device(struct device *dev, 1588ee959b00STony Jones struct device_attribute *attr, char *buf) 1589ded7f1a1SIshai Rabinovitz { 1590ee959b00STony Jones struct srp_target_port *target = host_to_target(class_to_shost(dev)); 1591ded7f1a1SIshai Rabinovitz 159205321937SGreg Kroah-Hartman return sprintf(buf, "%s\n", target->srp_host->srp_dev->dev->name); 1593ded7f1a1SIshai Rabinovitz } 1594ded7f1a1SIshai Rabinovitz 1595ee959b00STony Jones static DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); 1596ee959b00STony Jones static DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); 1597ee959b00STony Jones static DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); 1598ee959b00STony Jones static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); 1599ee959b00STony Jones static DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); 1600ee959b00STony Jones static DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL); 1601ee959b00STony Jones static DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL); 1602ee959b00STony Jones static DEVICE_ATTR(local_ib_port, S_IRUGO, show_local_ib_port, NULL); 1603ee959b00STony Jones static DEVICE_ATTR(local_ib_device, S_IRUGO, show_local_ib_device, NULL); 16046ecb0c84SRoland Dreier 1605ee959b00STony Jones static struct device_attribute *srp_host_attrs[] = { 1606ee959b00STony Jones &dev_attr_id_ext, 1607ee959b00STony Jones &dev_attr_ioc_guid, 1608ee959b00STony Jones &dev_attr_service_id, 1609ee959b00STony Jones &dev_attr_pkey, 1610ee959b00STony Jones &dev_attr_dgid, 1611ee959b00STony Jones &dev_attr_orig_dgid, 1612ee959b00STony Jones &dev_attr_zero_req_lim, 1613ee959b00STony Jones &dev_attr_local_ib_port, 1614ee959b00STony Jones &dev_attr_local_ib_device, 16156ecb0c84SRoland Dreier NULL 16166ecb0c84SRoland Dreier }; 16176ecb0c84SRoland Dreier 1618aef9ec39SRoland Dreier static struct scsi_host_template srp_template = { 1619aef9ec39SRoland Dreier .module = THIS_MODULE, 1620b7f008fdSRoland Dreier .name = "InfiniBand SRP initiator", 1621b7f008fdSRoland Dreier .proc_name = DRV_NAME, 1622aef9ec39SRoland Dreier .info = srp_target_info, 1623aef9ec39SRoland Dreier .queuecommand = srp_queuecommand, 1624aef9ec39SRoland Dreier .eh_abort_handler = srp_abort, 1625aef9ec39SRoland Dreier .eh_device_reset_handler = srp_reset_device, 1626aef9ec39SRoland Dreier .eh_host_reset_handler = srp_reset_host, 1627aef9ec39SRoland Dreier .can_queue = SRP_SQ_SIZE, 1628aef9ec39SRoland Dreier .this_id = -1, 1629aef9ec39SRoland Dreier .cmd_per_lun = SRP_SQ_SIZE, 16306ecb0c84SRoland Dreier .use_clustering = ENABLE_CLUSTERING, 16316ecb0c84SRoland Dreier .shost_attrs = srp_host_attrs 1632aef9ec39SRoland Dreier }; 1633aef9ec39SRoland Dreier 1634aef9ec39SRoland Dreier static int srp_add_target(struct srp_host *host, struct srp_target_port *target) 1635aef9ec39SRoland Dreier { 16363236822bSFUJITA Tomonori struct srp_rport_identifiers ids; 16373236822bSFUJITA Tomonori struct srp_rport *rport; 16383236822bSFUJITA Tomonori 1639aef9ec39SRoland Dreier sprintf(target->target_name, "SRP.T10:%016llX", 1640aef9ec39SRoland Dreier (unsigned long long) be64_to_cpu(target->id_ext)); 1641aef9ec39SRoland Dreier 164205321937SGreg Kroah-Hartman if (scsi_add_host(target->scsi_host, host->srp_dev->dev->dma_device)) 1643aef9ec39SRoland Dreier return -ENODEV; 1644aef9ec39SRoland Dreier 16453236822bSFUJITA Tomonori memcpy(ids.port_id, &target->id_ext, 8); 16463236822bSFUJITA Tomonori memcpy(ids.port_id + 8, &target->ioc_guid, 8); 1647aebd5e47SFUJITA Tomonori ids.roles = SRP_RPORT_ROLE_TARGET; 16483236822bSFUJITA Tomonori rport = srp_rport_add(target->scsi_host, &ids); 16493236822bSFUJITA Tomonori if (IS_ERR(rport)) { 16503236822bSFUJITA Tomonori scsi_remove_host(target->scsi_host); 16513236822bSFUJITA Tomonori return PTR_ERR(rport); 16523236822bSFUJITA Tomonori } 16533236822bSFUJITA Tomonori 1654b3589fd4SMatthew Wilcox spin_lock(&host->target_lock); 1655aef9ec39SRoland Dreier list_add_tail(&target->list, &host->target_list); 1656b3589fd4SMatthew Wilcox spin_unlock(&host->target_lock); 1657aef9ec39SRoland Dreier 1658aef9ec39SRoland Dreier target->state = SRP_TARGET_LIVE; 1659aef9ec39SRoland Dreier 1660aef9ec39SRoland Dreier scsi_scan_target(&target->scsi_host->shost_gendev, 16611962a4a1SMatthew Wilcox 0, target->scsi_id, SCAN_WILD_CARD, 0); 1662aef9ec39SRoland Dreier 1663aef9ec39SRoland Dreier return 0; 1664aef9ec39SRoland Dreier } 1665aef9ec39SRoland Dreier 1666ee959b00STony Jones static void srp_release_dev(struct device *dev) 1667aef9ec39SRoland Dreier { 1668aef9ec39SRoland Dreier struct srp_host *host = 1669ee959b00STony Jones container_of(dev, struct srp_host, dev); 1670aef9ec39SRoland Dreier 1671aef9ec39SRoland Dreier complete(&host->released); 1672aef9ec39SRoland Dreier } 1673aef9ec39SRoland Dreier 1674aef9ec39SRoland Dreier static struct class srp_class = { 1675aef9ec39SRoland Dreier .name = "infiniband_srp", 1676ee959b00STony Jones .dev_release = srp_release_dev 1677aef9ec39SRoland Dreier }; 1678aef9ec39SRoland Dreier 1679aef9ec39SRoland Dreier /* 1680aef9ec39SRoland Dreier * Target ports are added by writing 1681aef9ec39SRoland Dreier * 1682aef9ec39SRoland Dreier * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>, 1683aef9ec39SRoland Dreier * pkey=<P_Key>,service_id=<service ID> 1684aef9ec39SRoland Dreier * 1685aef9ec39SRoland Dreier * to the add_target sysfs attribute. 1686aef9ec39SRoland Dreier */ 1687aef9ec39SRoland Dreier enum { 1688aef9ec39SRoland Dreier SRP_OPT_ERR = 0, 1689aef9ec39SRoland Dreier SRP_OPT_ID_EXT = 1 << 0, 1690aef9ec39SRoland Dreier SRP_OPT_IOC_GUID = 1 << 1, 1691aef9ec39SRoland Dreier SRP_OPT_DGID = 1 << 2, 1692aef9ec39SRoland Dreier SRP_OPT_PKEY = 1 << 3, 1693aef9ec39SRoland Dreier SRP_OPT_SERVICE_ID = 1 << 4, 1694aef9ec39SRoland Dreier SRP_OPT_MAX_SECT = 1 << 5, 169552fb2b50SVu Pham SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, 16960c0450dbSRamachandra K SRP_OPT_IO_CLASS = 1 << 7, 169701cb9bcbSIshai Rabinovitz SRP_OPT_INITIATOR_EXT = 1 << 8, 1698aef9ec39SRoland Dreier SRP_OPT_ALL = (SRP_OPT_ID_EXT | 1699aef9ec39SRoland Dreier SRP_OPT_IOC_GUID | 1700aef9ec39SRoland Dreier SRP_OPT_DGID | 1701aef9ec39SRoland Dreier SRP_OPT_PKEY | 1702aef9ec39SRoland Dreier SRP_OPT_SERVICE_ID), 1703aef9ec39SRoland Dreier }; 1704aef9ec39SRoland Dreier 1705a447c093SSteven Whitehouse static const match_table_t srp_opt_tokens = { 1706aef9ec39SRoland Dreier { SRP_OPT_ID_EXT, "id_ext=%s" }, 1707aef9ec39SRoland Dreier { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, 1708aef9ec39SRoland Dreier { SRP_OPT_DGID, "dgid=%s" }, 1709aef9ec39SRoland Dreier { SRP_OPT_PKEY, "pkey=%x" }, 1710aef9ec39SRoland Dreier { SRP_OPT_SERVICE_ID, "service_id=%s" }, 1711aef9ec39SRoland Dreier { SRP_OPT_MAX_SECT, "max_sect=%d" }, 171252fb2b50SVu Pham { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, 17130c0450dbSRamachandra K { SRP_OPT_IO_CLASS, "io_class=%x" }, 171401cb9bcbSIshai Rabinovitz { SRP_OPT_INITIATOR_EXT, "initiator_ext=%s" }, 1715aef9ec39SRoland Dreier { SRP_OPT_ERR, NULL } 1716aef9ec39SRoland Dreier }; 1717aef9ec39SRoland Dreier 1718aef9ec39SRoland Dreier static int srp_parse_options(const char *buf, struct srp_target_port *target) 1719aef9ec39SRoland Dreier { 1720aef9ec39SRoland Dreier char *options, *sep_opt; 1721aef9ec39SRoland Dreier char *p; 1722aef9ec39SRoland Dreier char dgid[3]; 1723aef9ec39SRoland Dreier substring_t args[MAX_OPT_ARGS]; 1724aef9ec39SRoland Dreier int opt_mask = 0; 1725aef9ec39SRoland Dreier int token; 1726aef9ec39SRoland Dreier int ret = -EINVAL; 1727aef9ec39SRoland Dreier int i; 1728aef9ec39SRoland Dreier 1729aef9ec39SRoland Dreier options = kstrdup(buf, GFP_KERNEL); 1730aef9ec39SRoland Dreier if (!options) 1731aef9ec39SRoland Dreier return -ENOMEM; 1732aef9ec39SRoland Dreier 1733aef9ec39SRoland Dreier sep_opt = options; 1734aef9ec39SRoland Dreier while ((p = strsep(&sep_opt, ",")) != NULL) { 1735aef9ec39SRoland Dreier if (!*p) 1736aef9ec39SRoland Dreier continue; 1737aef9ec39SRoland Dreier 1738aef9ec39SRoland Dreier token = match_token(p, srp_opt_tokens, args); 1739aef9ec39SRoland Dreier opt_mask |= token; 1740aef9ec39SRoland Dreier 1741aef9ec39SRoland Dreier switch (token) { 1742aef9ec39SRoland Dreier case SRP_OPT_ID_EXT: 1743aef9ec39SRoland Dreier p = match_strdup(args); 1744a20f3a6dSIshai Rabinovitz if (!p) { 1745a20f3a6dSIshai Rabinovitz ret = -ENOMEM; 1746a20f3a6dSIshai Rabinovitz goto out; 1747a20f3a6dSIshai Rabinovitz } 1748aef9ec39SRoland Dreier target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); 1749aef9ec39SRoland Dreier kfree(p); 1750aef9ec39SRoland Dreier break; 1751aef9ec39SRoland Dreier 1752aef9ec39SRoland Dreier case SRP_OPT_IOC_GUID: 1753aef9ec39SRoland Dreier p = match_strdup(args); 1754a20f3a6dSIshai Rabinovitz if (!p) { 1755a20f3a6dSIshai Rabinovitz ret = -ENOMEM; 1756a20f3a6dSIshai Rabinovitz goto out; 1757a20f3a6dSIshai Rabinovitz } 1758aef9ec39SRoland Dreier target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16)); 1759aef9ec39SRoland Dreier kfree(p); 1760aef9ec39SRoland Dreier break; 1761aef9ec39SRoland Dreier 1762aef9ec39SRoland Dreier case SRP_OPT_DGID: 1763aef9ec39SRoland Dreier p = match_strdup(args); 1764a20f3a6dSIshai Rabinovitz if (!p) { 1765a20f3a6dSIshai Rabinovitz ret = -ENOMEM; 1766a20f3a6dSIshai Rabinovitz goto out; 1767a20f3a6dSIshai Rabinovitz } 1768aef9ec39SRoland Dreier if (strlen(p) != 32) { 1769aef9ec39SRoland Dreier printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p); 1770ce1823f0SRoland Dreier kfree(p); 1771aef9ec39SRoland Dreier goto out; 1772aef9ec39SRoland Dreier } 1773aef9ec39SRoland Dreier 1774aef9ec39SRoland Dreier for (i = 0; i < 16; ++i) { 1775aef9ec39SRoland Dreier strlcpy(dgid, p + i * 2, 3); 1776aef9ec39SRoland Dreier target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16); 1777aef9ec39SRoland Dreier } 1778bf17c1c7SRoland Dreier kfree(p); 17793633b3d0SIshai Rabinovitz memcpy(target->orig_dgid, target->path.dgid.raw, 16); 1780aef9ec39SRoland Dreier break; 1781aef9ec39SRoland Dreier 1782aef9ec39SRoland Dreier case SRP_OPT_PKEY: 1783aef9ec39SRoland Dreier if (match_hex(args, &token)) { 1784aef9ec39SRoland Dreier printk(KERN_WARNING PFX "bad P_Key parameter '%s'\n", p); 1785aef9ec39SRoland Dreier goto out; 1786aef9ec39SRoland Dreier } 1787aef9ec39SRoland Dreier target->path.pkey = cpu_to_be16(token); 1788aef9ec39SRoland Dreier break; 1789aef9ec39SRoland Dreier 1790aef9ec39SRoland Dreier case SRP_OPT_SERVICE_ID: 1791aef9ec39SRoland Dreier p = match_strdup(args); 1792a20f3a6dSIshai Rabinovitz if (!p) { 1793a20f3a6dSIshai Rabinovitz ret = -ENOMEM; 1794a20f3a6dSIshai Rabinovitz goto out; 1795a20f3a6dSIshai Rabinovitz } 1796aef9ec39SRoland Dreier target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16)); 1797247e020eSSean Hefty target->path.service_id = target->service_id; 1798aef9ec39SRoland Dreier kfree(p); 1799aef9ec39SRoland Dreier break; 1800aef9ec39SRoland Dreier 1801aef9ec39SRoland Dreier case SRP_OPT_MAX_SECT: 1802aef9ec39SRoland Dreier if (match_int(args, &token)) { 1803aef9ec39SRoland Dreier printk(KERN_WARNING PFX "bad max sect parameter '%s'\n", p); 1804aef9ec39SRoland Dreier goto out; 1805aef9ec39SRoland Dreier } 1806aef9ec39SRoland Dreier target->scsi_host->max_sectors = token; 1807aef9ec39SRoland Dreier break; 1808aef9ec39SRoland Dreier 180952fb2b50SVu Pham case SRP_OPT_MAX_CMD_PER_LUN: 181052fb2b50SVu Pham if (match_int(args, &token)) { 181152fb2b50SVu Pham printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); 181252fb2b50SVu Pham goto out; 181352fb2b50SVu Pham } 181452fb2b50SVu Pham target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); 181552fb2b50SVu Pham break; 181652fb2b50SVu Pham 18170c0450dbSRamachandra K case SRP_OPT_IO_CLASS: 18180c0450dbSRamachandra K if (match_hex(args, &token)) { 18190c0450dbSRamachandra K printk(KERN_WARNING PFX "bad IO class parameter '%s' \n", p); 18200c0450dbSRamachandra K goto out; 18210c0450dbSRamachandra K } 18220c0450dbSRamachandra K if (token != SRP_REV10_IB_IO_CLASS && 18230c0450dbSRamachandra K token != SRP_REV16A_IB_IO_CLASS) { 18240c0450dbSRamachandra K printk(KERN_WARNING PFX "unknown IO class parameter value" 18250c0450dbSRamachandra K " %x specified (use %x or %x).\n", 18260c0450dbSRamachandra K token, SRP_REV10_IB_IO_CLASS, SRP_REV16A_IB_IO_CLASS); 18270c0450dbSRamachandra K goto out; 18280c0450dbSRamachandra K } 18290c0450dbSRamachandra K target->io_class = token; 18300c0450dbSRamachandra K break; 18310c0450dbSRamachandra K 183201cb9bcbSIshai Rabinovitz case SRP_OPT_INITIATOR_EXT: 183301cb9bcbSIshai Rabinovitz p = match_strdup(args); 1834a20f3a6dSIshai Rabinovitz if (!p) { 1835a20f3a6dSIshai Rabinovitz ret = -ENOMEM; 1836a20f3a6dSIshai Rabinovitz goto out; 1837a20f3a6dSIshai Rabinovitz } 183801cb9bcbSIshai Rabinovitz target->initiator_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); 183901cb9bcbSIshai Rabinovitz kfree(p); 184001cb9bcbSIshai Rabinovitz break; 184101cb9bcbSIshai Rabinovitz 1842aef9ec39SRoland Dreier default: 1843aef9ec39SRoland Dreier printk(KERN_WARNING PFX "unknown parameter or missing value " 1844aef9ec39SRoland Dreier "'%s' in target creation request\n", p); 1845aef9ec39SRoland Dreier goto out; 1846aef9ec39SRoland Dreier } 1847aef9ec39SRoland Dreier } 1848aef9ec39SRoland Dreier 1849aef9ec39SRoland Dreier if ((opt_mask & SRP_OPT_ALL) == SRP_OPT_ALL) 1850aef9ec39SRoland Dreier ret = 0; 1851aef9ec39SRoland Dreier else 1852aef9ec39SRoland Dreier for (i = 0; i < ARRAY_SIZE(srp_opt_tokens); ++i) 1853aef9ec39SRoland Dreier if ((srp_opt_tokens[i].token & SRP_OPT_ALL) && 1854aef9ec39SRoland Dreier !(srp_opt_tokens[i].token & opt_mask)) 1855aef9ec39SRoland Dreier printk(KERN_WARNING PFX "target creation request is " 1856aef9ec39SRoland Dreier "missing parameter '%s'\n", 1857aef9ec39SRoland Dreier srp_opt_tokens[i].pattern); 1858aef9ec39SRoland Dreier 1859aef9ec39SRoland Dreier out: 1860aef9ec39SRoland Dreier kfree(options); 1861aef9ec39SRoland Dreier return ret; 1862aef9ec39SRoland Dreier } 1863aef9ec39SRoland Dreier 1864ee959b00STony Jones static ssize_t srp_create_target(struct device *dev, 1865ee959b00STony Jones struct device_attribute *attr, 1866aef9ec39SRoland Dreier const char *buf, size_t count) 1867aef9ec39SRoland Dreier { 1868aef9ec39SRoland Dreier struct srp_host *host = 1869ee959b00STony Jones container_of(dev, struct srp_host, dev); 1870aef9ec39SRoland Dreier struct Scsi_Host *target_host; 1871aef9ec39SRoland Dreier struct srp_target_port *target; 1872aef9ec39SRoland Dreier int ret; 1873aef9ec39SRoland Dreier int i; 1874aef9ec39SRoland Dreier 1875aef9ec39SRoland Dreier target_host = scsi_host_alloc(&srp_template, 1876aef9ec39SRoland Dreier sizeof (struct srp_target_port)); 1877aef9ec39SRoland Dreier if (!target_host) 1878aef9ec39SRoland Dreier return -ENOMEM; 1879aef9ec39SRoland Dreier 18803236822bSFUJITA Tomonori target_host->transportt = ib_srp_transport_template; 18815f068992SRoland Dreier target_host->max_lun = SRP_MAX_LUN; 18823c8edf0eSArne Redlich target_host->max_cmd_len = sizeof ((struct srp_cmd *) (void *) 0L)->cdb; 18835f068992SRoland Dreier 1884aef9ec39SRoland Dreier target = host_to_target(target_host); 1885aef9ec39SRoland Dreier 18860c0450dbSRamachandra K target->io_class = SRP_REV16A_IB_IO_CLASS; 1887aef9ec39SRoland Dreier target->scsi_host = target_host; 1888aef9ec39SRoland Dreier target->srp_host = host; 1889aef9ec39SRoland Dreier 1890d945e1dfSRoland Dreier INIT_LIST_HEAD(&target->free_reqs); 1891aef9ec39SRoland Dreier INIT_LIST_HEAD(&target->req_queue); 1892d945e1dfSRoland Dreier for (i = 0; i < SRP_SQ_SIZE; ++i) { 1893d945e1dfSRoland Dreier target->req_ring[i].index = i; 1894d945e1dfSRoland Dreier list_add_tail(&target->req_ring[i].list, &target->free_reqs); 1895d945e1dfSRoland Dreier } 1896aef9ec39SRoland Dreier 1897aef9ec39SRoland Dreier ret = srp_parse_options(buf, target); 1898aef9ec39SRoland Dreier if (ret) 1899aef9ec39SRoland Dreier goto err; 1900aef9ec39SRoland Dreier 1901969a60f9SRoland Dreier ib_query_gid(host->srp_dev->dev, host->port, 0, &target->path.sgid); 1902aef9ec39SRoland Dreier 19037aa54bd7SDavid Dillow shost_printk(KERN_DEBUG, target->scsi_host, PFX 19047aa54bd7SDavid Dillow "new target: id_ext %016llx ioc_guid %016llx pkey %04x " 19055b095d98SHarvey Harrison "service_id %016llx dgid %pI6\n", 1906aef9ec39SRoland Dreier (unsigned long long) be64_to_cpu(target->id_ext), 1907aef9ec39SRoland Dreier (unsigned long long) be64_to_cpu(target->ioc_guid), 1908aef9ec39SRoland Dreier be16_to_cpu(target->path.pkey), 1909aef9ec39SRoland Dreier (unsigned long long) be64_to_cpu(target->service_id), 19108867cd7cSHarvey Harrison target->path.dgid.raw); 1911aef9ec39SRoland Dreier 1912aef9ec39SRoland Dreier ret = srp_create_target_ib(target); 1913aef9ec39SRoland Dreier if (ret) 1914aef9ec39SRoland Dreier goto err; 1915aef9ec39SRoland Dreier 19169fe4bcf4SDavid Dillow ret = srp_new_cm_id(target); 19179fe4bcf4SDavid Dillow if (ret) 1918aef9ec39SRoland Dreier goto err_free; 1919aef9ec39SRoland Dreier 19201033ff67SIshai Rabinovitz target->qp_in_error = 0; 1921aef9ec39SRoland Dreier ret = srp_connect_target(target); 1922aef9ec39SRoland Dreier if (ret) { 19237aa54bd7SDavid Dillow shost_printk(KERN_ERR, target->scsi_host, 19247aa54bd7SDavid Dillow PFX "Connection failed\n"); 1925aef9ec39SRoland Dreier goto err_cm_id; 1926aef9ec39SRoland Dreier } 1927aef9ec39SRoland Dreier 1928aef9ec39SRoland Dreier ret = srp_add_target(host, target); 1929aef9ec39SRoland Dreier if (ret) 1930aef9ec39SRoland Dreier goto err_disconnect; 1931aef9ec39SRoland Dreier 1932aef9ec39SRoland Dreier return count; 1933aef9ec39SRoland Dreier 1934aef9ec39SRoland Dreier err_disconnect: 1935aef9ec39SRoland Dreier srp_disconnect_target(target); 1936aef9ec39SRoland Dreier 1937aef9ec39SRoland Dreier err_cm_id: 1938aef9ec39SRoland Dreier ib_destroy_cm_id(target->cm_id); 1939aef9ec39SRoland Dreier 1940aef9ec39SRoland Dreier err_free: 1941aef9ec39SRoland Dreier srp_free_target_ib(target); 1942aef9ec39SRoland Dreier 1943aef9ec39SRoland Dreier err: 1944aef9ec39SRoland Dreier scsi_host_put(target_host); 1945aef9ec39SRoland Dreier 1946aef9ec39SRoland Dreier return ret; 1947aef9ec39SRoland Dreier } 1948aef9ec39SRoland Dreier 1949ee959b00STony Jones static DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target); 1950aef9ec39SRoland Dreier 1951ee959b00STony Jones static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, 1952ee959b00STony Jones char *buf) 1953aef9ec39SRoland Dreier { 1954ee959b00STony Jones struct srp_host *host = container_of(dev, struct srp_host, dev); 1955aef9ec39SRoland Dreier 195605321937SGreg Kroah-Hartman return sprintf(buf, "%s\n", host->srp_dev->dev->name); 1957aef9ec39SRoland Dreier } 1958aef9ec39SRoland Dreier 1959ee959b00STony Jones static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); 1960aef9ec39SRoland Dreier 1961ee959b00STony Jones static ssize_t show_port(struct device *dev, struct device_attribute *attr, 1962ee959b00STony Jones char *buf) 1963aef9ec39SRoland Dreier { 1964ee959b00STony Jones struct srp_host *host = container_of(dev, struct srp_host, dev); 1965aef9ec39SRoland Dreier 1966aef9ec39SRoland Dreier return sprintf(buf, "%d\n", host->port); 1967aef9ec39SRoland Dreier } 1968aef9ec39SRoland Dreier 1969ee959b00STony Jones static DEVICE_ATTR(port, S_IRUGO, show_port, NULL); 1970aef9ec39SRoland Dreier 1971f5358a17SRoland Dreier static struct srp_host *srp_add_port(struct srp_device *device, u8 port) 1972aef9ec39SRoland Dreier { 1973aef9ec39SRoland Dreier struct srp_host *host; 1974aef9ec39SRoland Dreier 1975aef9ec39SRoland Dreier host = kzalloc(sizeof *host, GFP_KERNEL); 1976aef9ec39SRoland Dreier if (!host) 1977aef9ec39SRoland Dreier return NULL; 1978aef9ec39SRoland Dreier 1979aef9ec39SRoland Dreier INIT_LIST_HEAD(&host->target_list); 1980b3589fd4SMatthew Wilcox spin_lock_init(&host->target_lock); 1981aef9ec39SRoland Dreier init_completion(&host->released); 198205321937SGreg Kroah-Hartman host->srp_dev = device; 1983aef9ec39SRoland Dreier host->port = port; 1984aef9ec39SRoland Dreier 1985ee959b00STony Jones host->dev.class = &srp_class; 1986ee959b00STony Jones host->dev.parent = device->dev->dma_device; 1987d927e38cSKay Sievers dev_set_name(&host->dev, "srp-%s-%d", device->dev->name, port); 1988aef9ec39SRoland Dreier 1989ee959b00STony Jones if (device_register(&host->dev)) 1990f5358a17SRoland Dreier goto free_host; 1991ee959b00STony Jones if (device_create_file(&host->dev, &dev_attr_add_target)) 1992aef9ec39SRoland Dreier goto err_class; 1993ee959b00STony Jones if (device_create_file(&host->dev, &dev_attr_ibdev)) 1994aef9ec39SRoland Dreier goto err_class; 1995ee959b00STony Jones if (device_create_file(&host->dev, &dev_attr_port)) 1996aef9ec39SRoland Dreier goto err_class; 1997aef9ec39SRoland Dreier 1998aef9ec39SRoland Dreier return host; 1999aef9ec39SRoland Dreier 2000aef9ec39SRoland Dreier err_class: 2001ee959b00STony Jones device_unregister(&host->dev); 2002aef9ec39SRoland Dreier 2003f5358a17SRoland Dreier free_host: 2004aef9ec39SRoland Dreier kfree(host); 2005aef9ec39SRoland Dreier 2006aef9ec39SRoland Dreier return NULL; 2007aef9ec39SRoland Dreier } 2008aef9ec39SRoland Dreier 2009aef9ec39SRoland Dreier static void srp_add_one(struct ib_device *device) 2010aef9ec39SRoland Dreier { 2011f5358a17SRoland Dreier struct srp_device *srp_dev; 2012f5358a17SRoland Dreier struct ib_device_attr *dev_attr; 2013f5358a17SRoland Dreier struct ib_fmr_pool_param fmr_param; 2014aef9ec39SRoland Dreier struct srp_host *host; 2015aef9ec39SRoland Dreier int s, e, p; 2016aef9ec39SRoland Dreier 2017f5358a17SRoland Dreier dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); 2018f5358a17SRoland Dreier if (!dev_attr) 2019cf311cd4SSean Hefty return; 2020aef9ec39SRoland Dreier 2021f5358a17SRoland Dreier if (ib_query_device(device, dev_attr)) { 2022f5358a17SRoland Dreier printk(KERN_WARNING PFX "Query device failed for %s\n", 2023f5358a17SRoland Dreier device->name); 2024f5358a17SRoland Dreier goto free_attr; 2025f5358a17SRoland Dreier } 2026f5358a17SRoland Dreier 2027f5358a17SRoland Dreier srp_dev = kmalloc(sizeof *srp_dev, GFP_KERNEL); 2028f5358a17SRoland Dreier if (!srp_dev) 2029f5358a17SRoland Dreier goto free_attr; 2030f5358a17SRoland Dreier 2031f5358a17SRoland Dreier /* 2032f5358a17SRoland Dreier * Use the smallest page size supported by the HCA, down to a 2033f5358a17SRoland Dreier * minimum of 512 bytes (which is the smallest sector that a 2034f5358a17SRoland Dreier * SCSI command will ever carry). 2035f5358a17SRoland Dreier */ 2036f5358a17SRoland Dreier srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1); 2037f5358a17SRoland Dreier srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift; 2038bf628dc2SRoland Dreier srp_dev->fmr_page_mask = ~((u64) srp_dev->fmr_page_size - 1); 2039f5358a17SRoland Dreier 2040f5358a17SRoland Dreier INIT_LIST_HEAD(&srp_dev->dev_list); 2041f5358a17SRoland Dreier 2042f5358a17SRoland Dreier srp_dev->dev = device; 2043f5358a17SRoland Dreier srp_dev->pd = ib_alloc_pd(device); 2044f5358a17SRoland Dreier if (IS_ERR(srp_dev->pd)) 2045f5358a17SRoland Dreier goto free_dev; 2046f5358a17SRoland Dreier 2047f5358a17SRoland Dreier srp_dev->mr = ib_get_dma_mr(srp_dev->pd, 2048f5358a17SRoland Dreier IB_ACCESS_LOCAL_WRITE | 2049f5358a17SRoland Dreier IB_ACCESS_REMOTE_READ | 2050f5358a17SRoland Dreier IB_ACCESS_REMOTE_WRITE); 2051f5358a17SRoland Dreier if (IS_ERR(srp_dev->mr)) 2052f5358a17SRoland Dreier goto err_pd; 2053f5358a17SRoland Dreier 2054f5358a17SRoland Dreier memset(&fmr_param, 0, sizeof fmr_param); 2055f5358a17SRoland Dreier fmr_param.pool_size = SRP_FMR_POOL_SIZE; 2056f5358a17SRoland Dreier fmr_param.dirty_watermark = SRP_FMR_DIRTY_SIZE; 2057f5358a17SRoland Dreier fmr_param.cache = 1; 2058f5358a17SRoland Dreier fmr_param.max_pages_per_fmr = SRP_FMR_SIZE; 2059f5358a17SRoland Dreier fmr_param.page_shift = srp_dev->fmr_page_shift; 2060f5358a17SRoland Dreier fmr_param.access = (IB_ACCESS_LOCAL_WRITE | 2061f5358a17SRoland Dreier IB_ACCESS_REMOTE_WRITE | 2062f5358a17SRoland Dreier IB_ACCESS_REMOTE_READ); 2063f5358a17SRoland Dreier 2064f5358a17SRoland Dreier srp_dev->fmr_pool = ib_create_fmr_pool(srp_dev->pd, &fmr_param); 2065f5358a17SRoland Dreier if (IS_ERR(srp_dev->fmr_pool)) 2066f5358a17SRoland Dreier srp_dev->fmr_pool = NULL; 2067aef9ec39SRoland Dreier 206807ebafbaSTom Tucker if (device->node_type == RDMA_NODE_IB_SWITCH) { 2069aef9ec39SRoland Dreier s = 0; 2070aef9ec39SRoland Dreier e = 0; 2071aef9ec39SRoland Dreier } else { 2072aef9ec39SRoland Dreier s = 1; 2073aef9ec39SRoland Dreier e = device->phys_port_cnt; 2074aef9ec39SRoland Dreier } 2075aef9ec39SRoland Dreier 2076aef9ec39SRoland Dreier for (p = s; p <= e; ++p) { 2077f5358a17SRoland Dreier host = srp_add_port(srp_dev, p); 2078aef9ec39SRoland Dreier if (host) 2079f5358a17SRoland Dreier list_add_tail(&host->list, &srp_dev->dev_list); 2080aef9ec39SRoland Dreier } 2081aef9ec39SRoland Dreier 2082f5358a17SRoland Dreier ib_set_client_data(device, &srp_client, srp_dev); 2083f5358a17SRoland Dreier 2084f5358a17SRoland Dreier goto free_attr; 2085f5358a17SRoland Dreier 2086f5358a17SRoland Dreier err_pd: 2087f5358a17SRoland Dreier ib_dealloc_pd(srp_dev->pd); 2088f5358a17SRoland Dreier 2089f5358a17SRoland Dreier free_dev: 2090f5358a17SRoland Dreier kfree(srp_dev); 2091f5358a17SRoland Dreier 2092f5358a17SRoland Dreier free_attr: 2093f5358a17SRoland Dreier kfree(dev_attr); 2094aef9ec39SRoland Dreier } 2095aef9ec39SRoland Dreier 2096aef9ec39SRoland Dreier static void srp_remove_one(struct ib_device *device) 2097aef9ec39SRoland Dreier { 2098f5358a17SRoland Dreier struct srp_device *srp_dev; 2099aef9ec39SRoland Dreier struct srp_host *host, *tmp_host; 2100aef9ec39SRoland Dreier LIST_HEAD(target_list); 2101aef9ec39SRoland Dreier struct srp_target_port *target, *tmp_target; 2102aef9ec39SRoland Dreier 2103f5358a17SRoland Dreier srp_dev = ib_get_client_data(device, &srp_client); 2104aef9ec39SRoland Dreier 2105f5358a17SRoland Dreier list_for_each_entry_safe(host, tmp_host, &srp_dev->dev_list, list) { 2106ee959b00STony Jones device_unregister(&host->dev); 2107aef9ec39SRoland Dreier /* 2108aef9ec39SRoland Dreier * Wait for the sysfs entry to go away, so that no new 2109aef9ec39SRoland Dreier * target ports can be created. 2110aef9ec39SRoland Dreier */ 2111aef9ec39SRoland Dreier wait_for_completion(&host->released); 2112aef9ec39SRoland Dreier 2113aef9ec39SRoland Dreier /* 2114aef9ec39SRoland Dreier * Mark all target ports as removed, so we stop queueing 2115aef9ec39SRoland Dreier * commands and don't try to reconnect. 2116aef9ec39SRoland Dreier */ 2117b3589fd4SMatthew Wilcox spin_lock(&host->target_lock); 2118549c5fc2SMatthew Wilcox list_for_each_entry(target, &host->target_list, list) { 21190c5b3952SIshai Rabinovitz spin_lock_irq(target->scsi_host->host_lock); 2120aef9ec39SRoland Dreier target->state = SRP_TARGET_REMOVED; 21210c5b3952SIshai Rabinovitz spin_unlock_irq(target->scsi_host->host_lock); 2122aef9ec39SRoland Dreier } 2123b3589fd4SMatthew Wilcox spin_unlock(&host->target_lock); 2124aef9ec39SRoland Dreier 2125aef9ec39SRoland Dreier /* 2126aef9ec39SRoland Dreier * Wait for any reconnection tasks that may have 2127aef9ec39SRoland Dreier * started before we marked our target ports as 2128aef9ec39SRoland Dreier * removed, and any target port removal tasks. 2129aef9ec39SRoland Dreier */ 2130aef9ec39SRoland Dreier flush_scheduled_work(); 2131aef9ec39SRoland Dreier 2132aef9ec39SRoland Dreier list_for_each_entry_safe(target, tmp_target, 2133aef9ec39SRoland Dreier &host->target_list, list) { 2134b0e47c8bSDavid Dillow srp_remove_host(target->scsi_host); 2135ad696989SDave Dillow scsi_remove_host(target->scsi_host); 2136aef9ec39SRoland Dreier srp_disconnect_target(target); 2137aef9ec39SRoland Dreier ib_destroy_cm_id(target->cm_id); 2138aef9ec39SRoland Dreier srp_free_target_ib(target); 2139aef9ec39SRoland Dreier scsi_host_put(target->scsi_host); 2140aef9ec39SRoland Dreier } 2141aef9ec39SRoland Dreier 2142aef9ec39SRoland Dreier kfree(host); 2143aef9ec39SRoland Dreier } 2144aef9ec39SRoland Dreier 2145f5358a17SRoland Dreier if (srp_dev->fmr_pool) 2146f5358a17SRoland Dreier ib_destroy_fmr_pool(srp_dev->fmr_pool); 2147f5358a17SRoland Dreier ib_dereg_mr(srp_dev->mr); 2148f5358a17SRoland Dreier ib_dealloc_pd(srp_dev->pd); 2149f5358a17SRoland Dreier 2150f5358a17SRoland Dreier kfree(srp_dev); 2151aef9ec39SRoland Dreier } 2152aef9ec39SRoland Dreier 21533236822bSFUJITA Tomonori static struct srp_function_template ib_srp_transport_functions = { 21543236822bSFUJITA Tomonori }; 21553236822bSFUJITA Tomonori 2156aef9ec39SRoland Dreier static int __init srp_init_module(void) 2157aef9ec39SRoland Dreier { 2158aef9ec39SRoland Dreier int ret; 2159aef9ec39SRoland Dreier 21601e89a194SDavid Dillow if (srp_sg_tablesize > 255) { 21611e89a194SDavid Dillow printk(KERN_WARNING PFX "Clamping srp_sg_tablesize to 255\n"); 21621e89a194SDavid Dillow srp_sg_tablesize = 255; 21631e89a194SDavid Dillow } 21641e89a194SDavid Dillow 21653236822bSFUJITA Tomonori ib_srp_transport_template = 21663236822bSFUJITA Tomonori srp_attach_transport(&ib_srp_transport_functions); 21673236822bSFUJITA Tomonori if (!ib_srp_transport_template) 21683236822bSFUJITA Tomonori return -ENOMEM; 21693236822bSFUJITA Tomonori 217074b0a15bSVu Pham srp_template.sg_tablesize = srp_sg_tablesize; 217174b0a15bSVu Pham srp_max_iu_len = (sizeof (struct srp_cmd) + 217274b0a15bSVu Pham sizeof (struct srp_indirect_buf) + 217374b0a15bSVu Pham srp_sg_tablesize * 16); 217474b0a15bSVu Pham 2175aef9ec39SRoland Dreier ret = class_register(&srp_class); 2176aef9ec39SRoland Dreier if (ret) { 2177aef9ec39SRoland Dreier printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); 21783236822bSFUJITA Tomonori srp_release_transport(ib_srp_transport_template); 2179aef9ec39SRoland Dreier return ret; 2180aef9ec39SRoland Dreier } 2181aef9ec39SRoland Dreier 2182c1a0b23bSMichael S. Tsirkin ib_sa_register_client(&srp_sa_client); 2183c1a0b23bSMichael S. Tsirkin 2184aef9ec39SRoland Dreier ret = ib_register_client(&srp_client); 2185aef9ec39SRoland Dreier if (ret) { 2186aef9ec39SRoland Dreier printk(KERN_ERR PFX "couldn't register IB client\n"); 21873236822bSFUJITA Tomonori srp_release_transport(ib_srp_transport_template); 2188c1a0b23bSMichael S. Tsirkin ib_sa_unregister_client(&srp_sa_client); 2189aef9ec39SRoland Dreier class_unregister(&srp_class); 2190aef9ec39SRoland Dreier return ret; 2191aef9ec39SRoland Dreier } 2192aef9ec39SRoland Dreier 2193aef9ec39SRoland Dreier return 0; 2194aef9ec39SRoland Dreier } 2195aef9ec39SRoland Dreier 2196aef9ec39SRoland Dreier static void __exit srp_cleanup_module(void) 2197aef9ec39SRoland Dreier { 2198aef9ec39SRoland Dreier ib_unregister_client(&srp_client); 2199c1a0b23bSMichael S. Tsirkin ib_sa_unregister_client(&srp_sa_client); 2200aef9ec39SRoland Dreier class_unregister(&srp_class); 22013236822bSFUJITA Tomonori srp_release_transport(ib_srp_transport_template); 2202aef9ec39SRoland Dreier } 2203aef9ec39SRoland Dreier 2204aef9ec39SRoland Dreier module_init(srp_init_module); 2205aef9ec39SRoland Dreier module_exit(srp_cleanup_module); 2206