165e7ae7bSOr Gerlitz /* 265e7ae7bSOr Gerlitz * iSCSI Initiator over iSER Data-Path 365e7ae7bSOr Gerlitz * 465e7ae7bSOr Gerlitz * Copyright (C) 2004 Dmitry Yusupov 565e7ae7bSOr Gerlitz * Copyright (C) 2004 Alex Aizman 665e7ae7bSOr Gerlitz * Copyright (C) 2005 Mike Christie 765e7ae7bSOr Gerlitz * Copyright (c) 2005, 2006 Voltaire, Inc. All rights reserved. 828f292e8SOr Gerlitz * Copyright (c) 2013 Mellanox Technologies. All rights reserved. 965e7ae7bSOr Gerlitz * maintained by openib-general@openib.org 1065e7ae7bSOr Gerlitz * 1165e7ae7bSOr Gerlitz * This software is available to you under a choice of one of two 1265e7ae7bSOr Gerlitz * licenses. You may choose to be licensed under the terms of the GNU 1365e7ae7bSOr Gerlitz * General Public License (GPL) Version 2, available from the file 1465e7ae7bSOr Gerlitz * COPYING in the main directory of this source tree, or the 1565e7ae7bSOr Gerlitz * OpenIB.org BSD license below: 1665e7ae7bSOr Gerlitz * 1765e7ae7bSOr Gerlitz * Redistribution and use in source and binary forms, with or 1865e7ae7bSOr Gerlitz * without modification, are permitted provided that the following 1965e7ae7bSOr Gerlitz * conditions are met: 2065e7ae7bSOr Gerlitz * 2165e7ae7bSOr Gerlitz * - Redistributions of source code must retain the above 2265e7ae7bSOr Gerlitz * copyright notice, this list of conditions and the following 2365e7ae7bSOr Gerlitz * disclaimer. 2465e7ae7bSOr Gerlitz * 2565e7ae7bSOr Gerlitz * - Redistributions in binary form must reproduce the above 2665e7ae7bSOr Gerlitz * copyright notice, this list of conditions and the following 2765e7ae7bSOr Gerlitz * disclaimer in the documentation and/or other materials 2865e7ae7bSOr Gerlitz * provided with the distribution. 2965e7ae7bSOr Gerlitz * 3065e7ae7bSOr Gerlitz * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 3165e7ae7bSOr Gerlitz * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 3265e7ae7bSOr Gerlitz * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 3365e7ae7bSOr Gerlitz * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 3465e7ae7bSOr Gerlitz * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 3565e7ae7bSOr Gerlitz * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 3665e7ae7bSOr Gerlitz * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 3765e7ae7bSOr Gerlitz * SOFTWARE. 3865e7ae7bSOr Gerlitz * 3965e7ae7bSOr Gerlitz * Credits: 4065e7ae7bSOr Gerlitz * Christoph Hellwig 4165e7ae7bSOr Gerlitz * FUJITA Tomonori 4265e7ae7bSOr Gerlitz * Arne Redlich 4365e7ae7bSOr Gerlitz * Zhenyu Wang 4465e7ae7bSOr Gerlitz * Modified by: 4565e7ae7bSOr Gerlitz * Erez Zilber 4665e7ae7bSOr Gerlitz */ 4765e7ae7bSOr Gerlitz 4865e7ae7bSOr Gerlitz #include <linux/types.h> 4965e7ae7bSOr Gerlitz #include <linux/list.h> 5065e7ae7bSOr Gerlitz #include <linux/hardirq.h> 5165e7ae7bSOr Gerlitz #include <linux/kfifo.h> 5265e7ae7bSOr Gerlitz #include <linux/blkdev.h> 5365e7ae7bSOr Gerlitz #include <linux/init.h> 5465e7ae7bSOr Gerlitz #include <linux/ioctl.h> 5565e7ae7bSOr Gerlitz #include <linux/cdev.h> 5665e7ae7bSOr Gerlitz #include <linux/in.h> 5765e7ae7bSOr Gerlitz #include <linux/net.h> 5865e7ae7bSOr Gerlitz #include <linux/scatterlist.h> 5965e7ae7bSOr Gerlitz #include <linux/delay.h> 605a0e3ad6STejun Heo #include <linux/slab.h> 61e4dd23d7SPaul Gortmaker #include <linux/module.h> 6265e7ae7bSOr Gerlitz 6365e7ae7bSOr Gerlitz #include <net/sock.h> 6465e7ae7bSOr Gerlitz 6565e7ae7bSOr Gerlitz #include <asm/uaccess.h> 6665e7ae7bSOr Gerlitz 6765e7ae7bSOr Gerlitz #include <scsi/scsi_cmnd.h> 6865e7ae7bSOr Gerlitz #include <scsi/scsi_device.h> 6965e7ae7bSOr Gerlitz #include <scsi/scsi_eh.h> 7065e7ae7bSOr Gerlitz #include <scsi/scsi_tcq.h> 7165e7ae7bSOr Gerlitz #include <scsi/scsi_host.h> 7265e7ae7bSOr Gerlitz #include <scsi/scsi.h> 7365e7ae7bSOr Gerlitz #include <scsi/scsi_transport_iscsi.h> 7465e7ae7bSOr Gerlitz 7565e7ae7bSOr Gerlitz #include "iscsi_iser.h" 7665e7ae7bSOr Gerlitz 7775613521SMike Christie static struct scsi_host_template iscsi_iser_sht; 7875613521SMike Christie static struct iscsi_transport iscsi_iser_transport; 7975613521SMike Christie static struct scsi_transport_template *iscsi_iser_scsi_transport; 8075613521SMike Christie 8165e7ae7bSOr Gerlitz static unsigned int iscsi_max_lun = 512; 8265e7ae7bSOr Gerlitz module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); 8365e7ae7bSOr Gerlitz 8465e7ae7bSOr Gerlitz int iser_debug_level = 0; 857f733847SAlex Tabachnik bool iser_pi_enable = false; 867f733847SAlex Tabachnik int iser_pi_guard = 0; 8765e7ae7bSOr Gerlitz 88c1d786e6SRoi Dayan MODULE_DESCRIPTION("iSER (iSCSI Extensions for RDMA) Datamover"); 8965e7ae7bSOr Gerlitz MODULE_LICENSE("Dual BSD/GPL"); 9065e7ae7bSOr Gerlitz MODULE_AUTHOR("Alex Nezhinsky, Dan Bar Dov, Or Gerlitz"); 91c1d786e6SRoi Dayan MODULE_VERSION(DRV_VER); 9265e7ae7bSOr Gerlitz 9365e7ae7bSOr Gerlitz module_param_named(debug_level, iser_debug_level, int, 0644); 9465e7ae7bSOr Gerlitz MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:disabled)"); 9565e7ae7bSOr Gerlitz 967f733847SAlex Tabachnik module_param_named(pi_enable, iser_pi_enable, bool, 0644); 977f733847SAlex Tabachnik MODULE_PARM_DESC(pi_enable, "Enable T10-PI offload support (default:disabled)"); 987f733847SAlex Tabachnik 997f733847SAlex Tabachnik module_param_named(pi_guard, iser_pi_guard, int, 0644); 1007f733847SAlex Tabachnik MODULE_PARM_DESC(pi_guard, "T10-PI guard_type, 0:CRC|1:IP_CSUM (default:CRC)"); 1017f733847SAlex Tabachnik 10265e7ae7bSOr Gerlitz struct iser_global ig; 10365e7ae7bSOr Gerlitz 10465e7ae7bSOr Gerlitz void 10565e7ae7bSOr Gerlitz iscsi_iser_recv(struct iscsi_conn *conn, 10665e7ae7bSOr Gerlitz struct iscsi_hdr *hdr, char *rx_data, int rx_data_len) 10765e7ae7bSOr Gerlitz { 10865e7ae7bSOr Gerlitz int rc = 0; 10965e7ae7bSOr Gerlitz int datalen; 11065e7ae7bSOr Gerlitz int ahslen; 11165e7ae7bSOr Gerlitz 11265e7ae7bSOr Gerlitz /* verify PDU length */ 11365e7ae7bSOr Gerlitz datalen = ntoh24(hdr->dlength); 114200ae1a0SOr Gerlitz if (datalen > rx_data_len || (datalen + 4) < rx_data_len) { 115200ae1a0SOr Gerlitz iser_err("wrong datalen %d (hdr), %d (IB)\n", 11665e7ae7bSOr Gerlitz datalen, rx_data_len); 11765e7ae7bSOr Gerlitz rc = ISCSI_ERR_DATALEN; 11865e7ae7bSOr Gerlitz goto error; 11965e7ae7bSOr Gerlitz } 12065e7ae7bSOr Gerlitz 121200ae1a0SOr Gerlitz if (datalen != rx_data_len) 122200ae1a0SOr Gerlitz iser_dbg("aligned datalen (%d) hdr, %d (IB)\n", 123200ae1a0SOr Gerlitz datalen, rx_data_len); 124200ae1a0SOr Gerlitz 12565e7ae7bSOr Gerlitz /* read AHS */ 12665e7ae7bSOr Gerlitz ahslen = hdr->hlength * 4; 12765e7ae7bSOr Gerlitz 12865e7ae7bSOr Gerlitz rc = iscsi_complete_pdu(conn, hdr, rx_data, rx_data_len); 12965e7ae7bSOr Gerlitz if (rc && rc != ISCSI_ERR_NO_SCSI_CMD) 13065e7ae7bSOr Gerlitz goto error; 13165e7ae7bSOr Gerlitz 13265e7ae7bSOr Gerlitz return; 13365e7ae7bSOr Gerlitz error: 13465e7ae7bSOr Gerlitz iscsi_conn_failure(conn, rc); 13565e7ae7bSOr Gerlitz } 13665e7ae7bSOr Gerlitz 1372ff79d52SMike Christie static int iscsi_iser_pdu_alloc(struct iscsi_task *task, uint8_t opcode) 1380f9c7449SMike Christie { 1390f9c7449SMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 1400f9c7449SMike Christie 1410f9c7449SMike Christie task->hdr = (struct iscsi_hdr *)&iser_task->desc.iscsi_header; 1420f9c7449SMike Christie task->hdr_max = sizeof(iser_task->desc.iscsi_header); 1430f9c7449SMike Christie return 0; 1440f9c7449SMike Christie } 14565e7ae7bSOr Gerlitz 146f19624aaSOr Gerlitz int iser_initialize_task_headers(struct iscsi_task *task, 147f19624aaSOr Gerlitz struct iser_tx_desc *tx_desc) 148f19624aaSOr Gerlitz { 149f19624aaSOr Gerlitz struct iscsi_iser_conn *iser_conn = task->conn->dd_data; 150f19624aaSOr Gerlitz struct iser_device *device = iser_conn->ib_conn->device; 151f19624aaSOr Gerlitz struct iscsi_iser_task *iser_task = task->dd_data; 152f19624aaSOr Gerlitz u64 dma_addr; 153f19624aaSOr Gerlitz 154f19624aaSOr Gerlitz dma_addr = ib_dma_map_single(device->ib_device, (void *)tx_desc, 155f19624aaSOr Gerlitz ISER_HEADERS_LEN, DMA_TO_DEVICE); 156f19624aaSOr Gerlitz if (ib_dma_mapping_error(device->ib_device, dma_addr)) 157f19624aaSOr Gerlitz return -ENOMEM; 158f19624aaSOr Gerlitz 159f19624aaSOr Gerlitz tx_desc->dma_addr = dma_addr; 160f19624aaSOr Gerlitz tx_desc->tx_sg[0].addr = tx_desc->dma_addr; 161f19624aaSOr Gerlitz tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; 162f19624aaSOr Gerlitz tx_desc->tx_sg[0].lkey = device->mr->lkey; 163f19624aaSOr Gerlitz 164f19624aaSOr Gerlitz iser_task->iser_conn = iser_conn; 165f19624aaSOr Gerlitz return 0; 166f19624aaSOr Gerlitz } 16765e7ae7bSOr Gerlitz /** 1682261ec3dSMike Christie * iscsi_iser_task_init - Initialize task 1692261ec3dSMike Christie * @task: iscsi task 17065e7ae7bSOr Gerlitz * 1712261ec3dSMike Christie * Initialize the task for the scsi command or mgmt command. 1722747fdb2SMike Christie */ 173a8ac6311SOlaf Kirch static int 1742261ec3dSMike Christie iscsi_iser_task_init(struct iscsi_task *task) 17565e7ae7bSOr Gerlitz { 1762261ec3dSMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 17765e7ae7bSOr Gerlitz 178f19624aaSOr Gerlitz if (iser_initialize_task_headers(task, &iser_task->desc)) 179f19624aaSOr Gerlitz return -ENOMEM; 180f19624aaSOr Gerlitz 1812261ec3dSMike Christie /* mgmt task */ 182f19624aaSOr Gerlitz if (!task->sc) 1832747fdb2SMike Christie return 0; 1842747fdb2SMike Christie 1852261ec3dSMike Christie iser_task->command_sent = 0; 1862261ec3dSMike Christie iser_task_rdma_init(iser_task); 187a8ac6311SOlaf Kirch return 0; 18865e7ae7bSOr Gerlitz } 18965e7ae7bSOr Gerlitz 19065e7ae7bSOr Gerlitz /** 1912261ec3dSMike Christie * iscsi_iser_mtask_xmit - xmit management(immediate) task 19265e7ae7bSOr Gerlitz * @conn: iscsi connection 1932261ec3dSMike Christie * @task: task management task 19465e7ae7bSOr Gerlitz * 19565e7ae7bSOr Gerlitz * Notes: 19665e7ae7bSOr Gerlitz * The function can return -EAGAIN in which case caller must 19765e7ae7bSOr Gerlitz * call it again later, or recover. '0' return code means successful 19865e7ae7bSOr Gerlitz * xmit. 19965e7ae7bSOr Gerlitz * 20065e7ae7bSOr Gerlitz **/ 20165e7ae7bSOr Gerlitz static int 2022261ec3dSMike Christie iscsi_iser_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 20365e7ae7bSOr Gerlitz { 20465e7ae7bSOr Gerlitz int error = 0; 20565e7ae7bSOr Gerlitz 206962b4b52SOr Gerlitz iser_dbg("mtask xmit [cid %d itt 0x%x]\n", conn->id, task->itt); 20765e7ae7bSOr Gerlitz 2082261ec3dSMike Christie error = iser_send_control(conn, task); 20965e7ae7bSOr Gerlitz 2102261ec3dSMike Christie /* since iser xmits control with zero copy, tasks can not be recycled 21165e7ae7bSOr Gerlitz * right after sending them. 21265e7ae7bSOr Gerlitz * The recycling scheme is based on whether a response is expected 2132261ec3dSMike Christie * - if yes, the task is recycled at iscsi_complete_pdu 2142261ec3dSMike Christie * - if no, the task is recycled at iser_snd_completion 21565e7ae7bSOr Gerlitz */ 21665e7ae7bSOr Gerlitz return error; 21765e7ae7bSOr Gerlitz } 21865e7ae7bSOr Gerlitz 21965e7ae7bSOr Gerlitz static int 2202747fdb2SMike Christie iscsi_iser_task_xmit_unsol_data(struct iscsi_conn *conn, 2212261ec3dSMike Christie struct iscsi_task *task) 22265e7ae7bSOr Gerlitz { 2230f9c7449SMike Christie struct iscsi_r2t_info *r2t = &task->unsol_r2t; 22465e7ae7bSOr Gerlitz struct iscsi_data hdr; 22565e7ae7bSOr Gerlitz int error = 0; 22665e7ae7bSOr Gerlitz 22765e7ae7bSOr Gerlitz /* Send data-out PDUs while there's still unsolicited data to send */ 2280f9c7449SMike Christie while (iscsi_task_has_unsol_data(task)) { 2290f9c7449SMike Christie iscsi_prep_data_out_pdu(task, r2t, &hdr); 23048a237a2SMike Christie iser_dbg("Sending data-out: itt 0x%x, data count %d\n", 2310f9c7449SMike Christie hdr.itt, r2t->data_count); 23265e7ae7bSOr Gerlitz 23365e7ae7bSOr Gerlitz /* the buffer description has been passed with the command */ 23465e7ae7bSOr Gerlitz /* Send the command */ 2352261ec3dSMike Christie error = iser_send_data_out(conn, task, &hdr); 23665e7ae7bSOr Gerlitz if (error) { 2370f9c7449SMike Christie r2t->datasn--; 2382747fdb2SMike Christie goto iscsi_iser_task_xmit_unsol_data_exit; 23965e7ae7bSOr Gerlitz } 2400f9c7449SMike Christie r2t->sent += r2t->data_count; 24148a237a2SMike Christie iser_dbg("Need to send %d more as data-out PDUs\n", 2420f9c7449SMike Christie r2t->data_length - r2t->sent); 24365e7ae7bSOr Gerlitz } 24465e7ae7bSOr Gerlitz 2452747fdb2SMike Christie iscsi_iser_task_xmit_unsol_data_exit: 24665e7ae7bSOr Gerlitz return error; 24765e7ae7bSOr Gerlitz } 24865e7ae7bSOr Gerlitz 24965e7ae7bSOr Gerlitz static int 2502261ec3dSMike Christie iscsi_iser_task_xmit(struct iscsi_task *task) 25165e7ae7bSOr Gerlitz { 2522261ec3dSMike Christie struct iscsi_conn *conn = task->conn; 2532261ec3dSMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 25465e7ae7bSOr Gerlitz int error = 0; 25565e7ae7bSOr Gerlitz 2562261ec3dSMike Christie if (!task->sc) 2572261ec3dSMike Christie return iscsi_iser_mtask_xmit(conn, task); 2582747fdb2SMike Christie 2592261ec3dSMike Christie if (task->sc->sc_data_direction == DMA_TO_DEVICE) { 2602261ec3dSMike Christie BUG_ON(scsi_bufflen(task->sc) == 0); 26177a23c21SMike Christie 26248a237a2SMike Christie iser_dbg("cmd [itt %x total %d imm %d unsol_data %d\n", 2632261ec3dSMike Christie task->itt, scsi_bufflen(task->sc), 2640f9c7449SMike Christie task->imm_count, task->unsol_r2t.data_length); 26577a23c21SMike Christie } 26677a23c21SMike Christie 267962b4b52SOr Gerlitz iser_dbg("ctask xmit [cid %d itt 0x%x]\n", 2682261ec3dSMike Christie conn->id, task->itt); 26965e7ae7bSOr Gerlitz 27065e7ae7bSOr Gerlitz /* Send the cmd PDU */ 2712261ec3dSMike Christie if (!iser_task->command_sent) { 2722261ec3dSMike Christie error = iser_send_command(conn, task); 27365e7ae7bSOr Gerlitz if (error) 2742747fdb2SMike Christie goto iscsi_iser_task_xmit_exit; 2752261ec3dSMike Christie iser_task->command_sent = 1; 27665e7ae7bSOr Gerlitz } 27765e7ae7bSOr Gerlitz 27865e7ae7bSOr Gerlitz /* Send unsolicited data-out PDU(s) if necessary */ 2790f9c7449SMike Christie if (iscsi_task_has_unsol_data(task)) 2802261ec3dSMike Christie error = iscsi_iser_task_xmit_unsol_data(conn, task); 28165e7ae7bSOr Gerlitz 2822747fdb2SMike Christie iscsi_iser_task_xmit_exit: 28365e7ae7bSOr Gerlitz return error; 28465e7ae7bSOr Gerlitz } 28565e7ae7bSOr Gerlitz 2860f9c7449SMike Christie static void iscsi_iser_cleanup_task(struct iscsi_task *task) 28765e7ae7bSOr Gerlitz { 2882261ec3dSMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 28952439540SOr Gerlitz struct iser_tx_desc *tx_desc = &iser_task->desc; 29052439540SOr Gerlitz 29152439540SOr Gerlitz struct iscsi_iser_conn *iser_conn = task->conn->dd_data; 29252439540SOr Gerlitz struct iser_device *device = iser_conn->ib_conn->device; 29352439540SOr Gerlitz 29452439540SOr Gerlitz ib_dma_unmap_single(device->ib_device, 29552439540SOr Gerlitz tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE); 29665e7ae7bSOr Gerlitz 297b3cd5050SMike Christie /* mgmt tasks do not need special cleanup */ 298b3cd5050SMike Christie if (!task->sc) 2992747fdb2SMike Christie return; 30065e7ae7bSOr Gerlitz 3012261ec3dSMike Christie if (iser_task->status == ISER_TASK_STATUS_STARTED) { 3022261ec3dSMike Christie iser_task->status = ISER_TASK_STATUS_COMPLETED; 3032261ec3dSMike Christie iser_task_rdma_finalize(iser_task); 30465e7ae7bSOr Gerlitz } 30565e7ae7bSOr Gerlitz } 30665e7ae7bSOr Gerlitz 30765e7ae7bSOr Gerlitz static struct iscsi_cls_conn * 30865e7ae7bSOr Gerlitz iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) 30965e7ae7bSOr Gerlitz { 31065e7ae7bSOr Gerlitz struct iscsi_conn *conn; 31165e7ae7bSOr Gerlitz struct iscsi_cls_conn *cls_conn; 31265e7ae7bSOr Gerlitz struct iscsi_iser_conn *iser_conn; 31365e7ae7bSOr Gerlitz 3145d91e209SMike Christie cls_conn = iscsi_conn_setup(cls_session, sizeof(*iser_conn), conn_idx); 31565e7ae7bSOr Gerlitz if (!cls_conn) 31665e7ae7bSOr Gerlitz return NULL; 31765e7ae7bSOr Gerlitz conn = cls_conn->dd_data; 31865e7ae7bSOr Gerlitz 31965e7ae7bSOr Gerlitz /* 32065e7ae7bSOr Gerlitz * due to issues with the login code re iser sematics 32165e7ae7bSOr Gerlitz * this not set in iscsi_conn_setup - FIXME 32265e7ae7bSOr Gerlitz */ 323bcc60c38SOr Gerlitz conn->max_recv_dlength = ISER_RECV_DATA_SEG_LEN; 32465e7ae7bSOr Gerlitz 3255d91e209SMike Christie iser_conn = conn->dd_data; 32665e7ae7bSOr Gerlitz conn->dd_data = iser_conn; 32765e7ae7bSOr Gerlitz iser_conn->iscsi_conn = conn; 32865e7ae7bSOr Gerlitz 32965e7ae7bSOr Gerlitz return cls_conn; 33065e7ae7bSOr Gerlitz } 33165e7ae7bSOr Gerlitz 33265e7ae7bSOr Gerlitz static void 33365e7ae7bSOr Gerlitz iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn) 33465e7ae7bSOr Gerlitz { 33565e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 33665e7ae7bSOr Gerlitz struct iscsi_iser_conn *iser_conn = conn->dd_data; 337b40977d9SMike Christie struct iser_conn *ib_conn = iser_conn->ib_conn; 33865e7ae7bSOr Gerlitz 33965e7ae7bSOr Gerlitz iscsi_conn_teardown(cls_conn); 340b40977d9SMike Christie /* 341b40977d9SMike Christie * Userspace will normally call the stop callback and 342b40977d9SMike Christie * already have freed the ib_conn, but if it goofed up then 343b40977d9SMike Christie * we free it here. 344b40977d9SMike Christie */ 345b40977d9SMike Christie if (ib_conn) { 346b40977d9SMike Christie ib_conn->iser_conn = NULL; 34739ff05dbSOr Gerlitz iser_conn_put(ib_conn, 1); /* deref iscsi/ib conn unbinding */ 348b40977d9SMike Christie } 34965e7ae7bSOr Gerlitz } 35065e7ae7bSOr Gerlitz 35165e7ae7bSOr Gerlitz static int 35265e7ae7bSOr Gerlitz iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session, 35365e7ae7bSOr Gerlitz struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, 35465e7ae7bSOr Gerlitz int is_leading) 35565e7ae7bSOr Gerlitz { 35665e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 35765e7ae7bSOr Gerlitz struct iscsi_iser_conn *iser_conn; 358b7f04513SShlomo Pongratz struct iscsi_session *session; 35965e7ae7bSOr Gerlitz struct iser_conn *ib_conn; 360412eeafaSMike Christie struct iscsi_endpoint *ep; 36165e7ae7bSOr Gerlitz int error; 36265e7ae7bSOr Gerlitz 36365e7ae7bSOr Gerlitz error = iscsi_conn_bind(cls_session, cls_conn, is_leading); 36465e7ae7bSOr Gerlitz if (error) 36565e7ae7bSOr Gerlitz return error; 36665e7ae7bSOr Gerlitz 36765e7ae7bSOr Gerlitz /* the transport ep handle comes from user space so it must be 36865e7ae7bSOr Gerlitz * verified against the global ib connections list */ 369412eeafaSMike Christie ep = iscsi_lookup_endpoint(transport_eph); 370412eeafaSMike Christie if (!ep) { 37165e7ae7bSOr Gerlitz iser_err("can't bind eph %llx\n", 37265e7ae7bSOr Gerlitz (unsigned long long)transport_eph); 37365e7ae7bSOr Gerlitz return -EINVAL; 37465e7ae7bSOr Gerlitz } 375412eeafaSMike Christie ib_conn = ep->dd_data; 376412eeafaSMike Christie 377b7f04513SShlomo Pongratz session = conn->session; 378b7f04513SShlomo Pongratz if (iser_alloc_rx_descriptors(ib_conn, session)) 37989e984e2SOr Gerlitz return -ENOMEM; 38089e984e2SOr Gerlitz 38165e7ae7bSOr Gerlitz /* binds the iSER connection retrieved from the previously 38265e7ae7bSOr Gerlitz * connected ep_handle to the iSCSI layer connection. exchanges 38365e7ae7bSOr Gerlitz * connection pointers */ 3844f363882SRoi Dayan iser_info("binding iscsi/iser conn %p %p to ib_conn %p\n", 38539ff05dbSOr Gerlitz conn, conn->dd_data, ib_conn); 38665e7ae7bSOr Gerlitz iser_conn = conn->dd_data; 38765e7ae7bSOr Gerlitz ib_conn->iser_conn = iser_conn; 38865e7ae7bSOr Gerlitz iser_conn->ib_conn = ib_conn; 38939ff05dbSOr Gerlitz iser_conn_get(ib_conn); /* ref iscsi/ib conn binding */ 39065e7ae7bSOr Gerlitz return 0; 39165e7ae7bSOr Gerlitz } 39265e7ae7bSOr Gerlitz 393b40977d9SMike Christie static void 394b40977d9SMike Christie iscsi_iser_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) 395b40977d9SMike Christie { 396b40977d9SMike Christie struct iscsi_conn *conn = cls_conn->dd_data; 397b40977d9SMike Christie struct iscsi_iser_conn *iser_conn = conn->dd_data; 398b40977d9SMike Christie struct iser_conn *ib_conn = iser_conn->ib_conn; 399b40977d9SMike Christie 400913e5bf4SMike Christie /* 401913e5bf4SMike Christie * Userspace may have goofed up and not bound the connection or 402913e5bf4SMike Christie * might have only partially setup the connection. 403913e5bf4SMike Christie */ 404913e5bf4SMike Christie if (ib_conn) { 405b40977d9SMike Christie iscsi_conn_stop(cls_conn, flag); 406b40977d9SMike Christie /* 407b40977d9SMike Christie * There is no unbind event so the stop callback 408b40977d9SMike Christie * must release the ref from the bind. 409b40977d9SMike Christie */ 41039ff05dbSOr Gerlitz iser_conn_put(ib_conn, 1); /* deref iscsi/ib conn unbinding */ 411913e5bf4SMike Christie } 412b40977d9SMike Christie iser_conn->ib_conn = NULL; 413b40977d9SMike Christie } 414b40977d9SMike Christie 41575613521SMike Christie static void iscsi_iser_session_destroy(struct iscsi_cls_session *cls_session) 41675613521SMike Christie { 41775613521SMike Christie struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 41875613521SMike Christie 419e5bd7b54SMike Christie iscsi_session_teardown(cls_session); 420a4804cd6SMike Christie iscsi_host_remove(shost); 421a4804cd6SMike Christie iscsi_host_free(shost); 42275613521SMike Christie } 42365e7ae7bSOr Gerlitz 42465e7ae7bSOr Gerlitz static struct iscsi_cls_session * 425412eeafaSMike Christie iscsi_iser_session_create(struct iscsi_endpoint *ep, 4261548271eSMike Christie uint16_t cmds_max, uint16_t qdepth, 4275e7facb7SMike Christie uint32_t initial_cmdsn) 42865e7ae7bSOr Gerlitz { 42965e7ae7bSOr Gerlitz struct iscsi_cls_session *cls_session; 43065e7ae7bSOr Gerlitz struct iscsi_session *session; 431412eeafaSMike Christie struct Scsi_Host *shost; 432b7f04513SShlomo Pongratz struct iser_conn *ib_conn = NULL; 43375613521SMike Christie 434962b4b52SOr Gerlitz shost = iscsi_host_alloc(&iscsi_iser_sht, 0, 0); 43575613521SMike Christie if (!shost) 43675613521SMike Christie return NULL; 43775613521SMike Christie shost->transportt = iscsi_iser_scsi_transport; 438b7f04513SShlomo Pongratz shost->cmd_per_lun = qdepth; 43975613521SMike Christie shost->max_lun = iscsi_max_lun; 44075613521SMike Christie shost->max_id = 0; 44175613521SMike Christie shost->max_channel = 0; 44275613521SMike Christie shost->max_cmd_len = 16; 44375613521SMike Christie 444412eeafaSMike Christie /* 445412eeafaSMike Christie * older userspace tools (before 2.0-870) did not pass us 446412eeafaSMike Christie * the leading conn's ep so this will be NULL; 447412eeafaSMike Christie */ 448412eeafaSMike Christie if (ep) 449412eeafaSMike Christie ib_conn = ep->dd_data; 450412eeafaSMike Christie 451412eeafaSMike Christie if (iscsi_host_add(shost, 452412eeafaSMike Christie ep ? ib_conn->device->ib_device->dma_device : NULL)) 45375613521SMike Christie goto free_host; 45465e7ae7bSOr Gerlitz 455b7f04513SShlomo Pongratz if (cmds_max > ISER_DEF_XMIT_CMDS_MAX) { 456b7f04513SShlomo Pongratz iser_info("cmds_max changed from %u to %u\n", 457b7f04513SShlomo Pongratz cmds_max, ISER_DEF_XMIT_CMDS_MAX); 458b7f04513SShlomo Pongratz cmds_max = ISER_DEF_XMIT_CMDS_MAX; 459b7f04513SShlomo Pongratz } 460b7f04513SShlomo Pongratz 46175613521SMike Christie cls_session = iscsi_session_setup(&iscsi_iser_transport, shost, 462b7f04513SShlomo Pongratz cmds_max, 0, 4632261ec3dSMike Christie sizeof(struct iscsi_iser_task), 4647970634bSMike Christie initial_cmdsn, 0); 46565e7ae7bSOr Gerlitz if (!cls_session) 46675613521SMike Christie goto remove_host; 46775613521SMike Christie session = cls_session->dd_data; 46865e7ae7bSOr Gerlitz 4692747fdb2SMike Christie shost->can_queue = session->scsi_cmds_max; 47065e7ae7bSOr Gerlitz return cls_session; 47175613521SMike Christie 47275613521SMike Christie remove_host: 473a4804cd6SMike Christie iscsi_host_remove(shost); 47475613521SMike Christie free_host: 475a4804cd6SMike Christie iscsi_host_free(shost); 47675613521SMike Christie return NULL; 47765e7ae7bSOr Gerlitz } 47865e7ae7bSOr Gerlitz 47965e7ae7bSOr Gerlitz static int 480358ff019SMike Christie iscsi_iser_set_param(struct iscsi_cls_conn *cls_conn, 481358ff019SMike Christie enum iscsi_param param, char *buf, int buflen) 48265e7ae7bSOr Gerlitz { 483358ff019SMike Christie int value; 48465e7ae7bSOr Gerlitz 48565e7ae7bSOr Gerlitz switch (param) { 48665e7ae7bSOr Gerlitz case ISCSI_PARAM_MAX_RECV_DLENGTH: 48765e7ae7bSOr Gerlitz /* TBD */ 48865e7ae7bSOr Gerlitz break; 48965e7ae7bSOr Gerlitz case ISCSI_PARAM_HDRDGST_EN: 490358ff019SMike Christie sscanf(buf, "%d", &value); 49165e7ae7bSOr Gerlitz if (value) { 4924f363882SRoi Dayan iser_err("DataDigest wasn't negotiated to None"); 49365e7ae7bSOr Gerlitz return -EPROTO; 49465e7ae7bSOr Gerlitz } 49565e7ae7bSOr Gerlitz break; 49665e7ae7bSOr Gerlitz case ISCSI_PARAM_DATADGST_EN: 497358ff019SMike Christie sscanf(buf, "%d", &value); 49865e7ae7bSOr Gerlitz if (value) { 4994f363882SRoi Dayan iser_err("DataDigest wasn't negotiated to None"); 50065e7ae7bSOr Gerlitz return -EPROTO; 50165e7ae7bSOr Gerlitz } 50265e7ae7bSOr Gerlitz break; 50365e7ae7bSOr Gerlitz case ISCSI_PARAM_IFMARKER_EN: 504358ff019SMike Christie sscanf(buf, "%d", &value); 50565e7ae7bSOr Gerlitz if (value) { 5064f363882SRoi Dayan iser_err("IFMarker wasn't negotiated to No"); 50765e7ae7bSOr Gerlitz return -EPROTO; 50865e7ae7bSOr Gerlitz } 50965e7ae7bSOr Gerlitz break; 51065e7ae7bSOr Gerlitz case ISCSI_PARAM_OFMARKER_EN: 511358ff019SMike Christie sscanf(buf, "%d", &value); 51265e7ae7bSOr Gerlitz if (value) { 5134f363882SRoi Dayan iser_err("OFMarker wasn't negotiated to No"); 51465e7ae7bSOr Gerlitz return -EPROTO; 51565e7ae7bSOr Gerlitz } 51665e7ae7bSOr Gerlitz break; 51765e7ae7bSOr Gerlitz default: 518358ff019SMike Christie return iscsi_set_param(cls_conn, param, buf, buflen); 51965e7ae7bSOr Gerlitz } 52065e7ae7bSOr Gerlitz 52165e7ae7bSOr Gerlitz return 0; 52265e7ae7bSOr Gerlitz } 52365e7ae7bSOr Gerlitz 52465e7ae7bSOr Gerlitz static void 52565e7ae7bSOr Gerlitz iscsi_iser_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) 52665e7ae7bSOr Gerlitz { 52765e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 52865e7ae7bSOr Gerlitz 52965e7ae7bSOr Gerlitz stats->txdata_octets = conn->txdata_octets; 53065e7ae7bSOr Gerlitz stats->rxdata_octets = conn->rxdata_octets; 53165e7ae7bSOr Gerlitz stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 53265e7ae7bSOr Gerlitz stats->dataout_pdus = conn->dataout_pdus_cnt; 53365e7ae7bSOr Gerlitz stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 53465e7ae7bSOr Gerlitz stats->datain_pdus = conn->datain_pdus_cnt; /* always 0 */ 53565e7ae7bSOr Gerlitz stats->r2t_pdus = conn->r2t_pdus_cnt; /* always 0 */ 53665e7ae7bSOr Gerlitz stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 53765e7ae7bSOr Gerlitz stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 53887528227SEli Dorfman stats->custom_length = 4; 53965e7ae7bSOr Gerlitz strcpy(stats->custom[0].desc, "qp_tx_queue_full"); 54065e7ae7bSOr Gerlitz stats->custom[0].value = 0; /* TB iser_conn->qp_tx_queue_full; */ 54165e7ae7bSOr Gerlitz strcpy(stats->custom[1].desc, "fmr_map_not_avail"); 54265e7ae7bSOr Gerlitz stats->custom[1].value = 0; /* TB iser_conn->fmr_map_not_avail */; 54365e7ae7bSOr Gerlitz strcpy(stats->custom[2].desc, "eh_abort_cnt"); 54465e7ae7bSOr Gerlitz stats->custom[2].value = conn->eh_abort_cnt; 54587528227SEli Dorfman strcpy(stats->custom[3].desc, "fmr_unalign_cnt"); 54687528227SEli Dorfman stats->custom[3].value = conn->fmr_unalign_cnt; 54765e7ae7bSOr Gerlitz } 54865e7ae7bSOr Gerlitz 5497c53c6f8SMike Christie static int iscsi_iser_get_ep_param(struct iscsi_endpoint *ep, 5507c53c6f8SMike Christie enum iscsi_param param, char *buf) 5517c53c6f8SMike Christie { 5527c53c6f8SMike Christie struct iser_conn *ib_conn = ep->dd_data; 5537c53c6f8SMike Christie int len; 5547c53c6f8SMike Christie 5557c53c6f8SMike Christie switch (param) { 5567c53c6f8SMike Christie case ISCSI_PARAM_CONN_PORT: 5577c53c6f8SMike Christie case ISCSI_PARAM_CONN_ADDRESS: 5587c53c6f8SMike Christie if (!ib_conn || !ib_conn->cma_id) 5597c53c6f8SMike Christie return -ENOTCONN; 5607c53c6f8SMike Christie 5617c53c6f8SMike Christie return iscsi_conn_get_addr_param((struct sockaddr_storage *) 5627c53c6f8SMike Christie &ib_conn->cma_id->route.addr.dst_addr, 5637c53c6f8SMike Christie param, buf); 5647c53c6f8SMike Christie break; 5657c53c6f8SMike Christie default: 5667c53c6f8SMike Christie return -ENOSYS; 5677c53c6f8SMike Christie } 5687c53c6f8SMike Christie 5697c53c6f8SMike Christie return len; 5707c53c6f8SMike Christie } 5717c53c6f8SMike Christie 572412eeafaSMike Christie static struct iscsi_endpoint * 57310eb0f01SMike Christie iscsi_iser_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 57410eb0f01SMike Christie int non_blocking) 57565e7ae7bSOr Gerlitz { 57665e7ae7bSOr Gerlitz int err; 57765e7ae7bSOr Gerlitz struct iser_conn *ib_conn; 578412eeafaSMike Christie struct iscsi_endpoint *ep; 57965e7ae7bSOr Gerlitz 580412eeafaSMike Christie ep = iscsi_create_endpoint(sizeof(*ib_conn)); 581412eeafaSMike Christie if (!ep) 582412eeafaSMike Christie return ERR_PTR(-ENOMEM); 58365e7ae7bSOr Gerlitz 584412eeafaSMike Christie ib_conn = ep->dd_data; 585412eeafaSMike Christie ib_conn->ep = ep; 586412eeafaSMike Christie iser_conn_init(ib_conn); 58765e7ae7bSOr Gerlitz 588412eeafaSMike Christie err = iser_connect(ib_conn, NULL, (struct sockaddr_in *)dst_addr, 589412eeafaSMike Christie non_blocking); 5907d9c0de4SOr Gerlitz if (err) 591412eeafaSMike Christie return ERR_PTR(err); 5927d9c0de4SOr Gerlitz 593412eeafaSMike Christie return ep; 59465e7ae7bSOr Gerlitz } 59565e7ae7bSOr Gerlitz 59665e7ae7bSOr Gerlitz static int 597412eeafaSMike Christie iscsi_iser_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 59865e7ae7bSOr Gerlitz { 599412eeafaSMike Christie struct iser_conn *ib_conn; 60065e7ae7bSOr Gerlitz int rc; 60165e7ae7bSOr Gerlitz 602412eeafaSMike Christie ib_conn = ep->dd_data; 60365e7ae7bSOr Gerlitz rc = wait_event_interruptible_timeout(ib_conn->wait, 60465e7ae7bSOr Gerlitz ib_conn->state == ISER_CONN_UP, 60565e7ae7bSOr Gerlitz msecs_to_jiffies(timeout_ms)); 60665e7ae7bSOr Gerlitz 60765e7ae7bSOr Gerlitz /* if conn establishment failed, return error code to iscsi */ 60865e7ae7bSOr Gerlitz if (!rc && 60965e7ae7bSOr Gerlitz (ib_conn->state == ISER_CONN_TERMINATING || 61065e7ae7bSOr Gerlitz ib_conn->state == ISER_CONN_DOWN)) 61165e7ae7bSOr Gerlitz rc = -1; 61265e7ae7bSOr Gerlitz 6134f363882SRoi Dayan iser_info("ib conn %p rc = %d\n", ib_conn, rc); 61465e7ae7bSOr Gerlitz 61565e7ae7bSOr Gerlitz if (rc > 0) 61665e7ae7bSOr Gerlitz return 1; /* success, this is the equivalent of POLLOUT */ 61765e7ae7bSOr Gerlitz else if (!rc) 61865e7ae7bSOr Gerlitz return 0; /* timeout */ 61965e7ae7bSOr Gerlitz else 62065e7ae7bSOr Gerlitz return rc; /* signal */ 62165e7ae7bSOr Gerlitz } 62265e7ae7bSOr Gerlitz 62365e7ae7bSOr Gerlitz static void 624412eeafaSMike Christie iscsi_iser_ep_disconnect(struct iscsi_endpoint *ep) 62565e7ae7bSOr Gerlitz { 6261c83469dSMike Christie struct iser_conn *ib_conn; 62765e7ae7bSOr Gerlitz 628412eeafaSMike Christie ib_conn = ep->dd_data; 629b40977d9SMike Christie if (ib_conn->iser_conn) 630b40977d9SMike Christie /* 631b40977d9SMike Christie * Must suspend xmit path if the ep is bound to the 632b40977d9SMike Christie * iscsi_conn, so we know we are not accessing the ib_conn 633b40977d9SMike Christie * when we free it. 634b40977d9SMike Christie * 635b40977d9SMike Christie * This may not be bound if the ep poll failed. 636b40977d9SMike Christie */ 637b40977d9SMike Christie iscsi_suspend_tx(ib_conn->iser_conn->iscsi_conn); 638b40977d9SMike Christie 63965e7ae7bSOr Gerlitz 6404f363882SRoi Dayan iser_info("ib conn %p state %d\n", ib_conn, ib_conn->state); 64165e7ae7bSOr Gerlitz iser_conn_terminate(ib_conn); 64265e7ae7bSOr Gerlitz } 64365e7ae7bSOr Gerlitz 644587a1f16SAl Viro static umode_t iser_attr_is_visible(int param_type, int param) 6453128c6c7SMike Christie { 6463128c6c7SMike Christie switch (param_type) { 647f27fb2efSMike Christie case ISCSI_HOST_PARAM: 648f27fb2efSMike Christie switch (param) { 649f27fb2efSMike Christie case ISCSI_HOST_PARAM_NETDEV_NAME: 650f27fb2efSMike Christie case ISCSI_HOST_PARAM_HWADDRESS: 651f27fb2efSMike Christie case ISCSI_HOST_PARAM_INITIATOR_NAME: 652f27fb2efSMike Christie return S_IRUGO; 653f27fb2efSMike Christie default: 654f27fb2efSMike Christie return 0; 655f27fb2efSMike Christie } 6563128c6c7SMike Christie case ISCSI_PARAM: 6573128c6c7SMike Christie switch (param) { 6583128c6c7SMike Christie case ISCSI_PARAM_MAX_RECV_DLENGTH: 6593128c6c7SMike Christie case ISCSI_PARAM_MAX_XMIT_DLENGTH: 6603128c6c7SMike Christie case ISCSI_PARAM_HDRDGST_EN: 6613128c6c7SMike Christie case ISCSI_PARAM_DATADGST_EN: 6623128c6c7SMike Christie case ISCSI_PARAM_CONN_ADDRESS: 6633128c6c7SMike Christie case ISCSI_PARAM_CONN_PORT: 6643128c6c7SMike Christie case ISCSI_PARAM_EXP_STATSN: 6653128c6c7SMike Christie case ISCSI_PARAM_PERSISTENT_ADDRESS: 6663128c6c7SMike Christie case ISCSI_PARAM_PERSISTENT_PORT: 6673128c6c7SMike Christie case ISCSI_PARAM_PING_TMO: 6683128c6c7SMike Christie case ISCSI_PARAM_RECV_TMO: 6691d063c17SMike Christie case ISCSI_PARAM_INITIAL_R2T_EN: 6701d063c17SMike Christie case ISCSI_PARAM_MAX_R2T: 6711d063c17SMike Christie case ISCSI_PARAM_IMM_DATA_EN: 6721d063c17SMike Christie case ISCSI_PARAM_FIRST_BURST: 6731d063c17SMike Christie case ISCSI_PARAM_MAX_BURST: 6741d063c17SMike Christie case ISCSI_PARAM_PDU_INORDER_EN: 6751d063c17SMike Christie case ISCSI_PARAM_DATASEQ_INORDER_EN: 6761d063c17SMike Christie case ISCSI_PARAM_TARGET_NAME: 6771d063c17SMike Christie case ISCSI_PARAM_TPGT: 6781d063c17SMike Christie case ISCSI_PARAM_USERNAME: 6791d063c17SMike Christie case ISCSI_PARAM_PASSWORD: 6801d063c17SMike Christie case ISCSI_PARAM_USERNAME_IN: 6811d063c17SMike Christie case ISCSI_PARAM_PASSWORD_IN: 6821d063c17SMike Christie case ISCSI_PARAM_FAST_ABORT: 6831d063c17SMike Christie case ISCSI_PARAM_ABORT_TMO: 6841d063c17SMike Christie case ISCSI_PARAM_LU_RESET_TMO: 6851d063c17SMike Christie case ISCSI_PARAM_TGT_RESET_TMO: 6861d063c17SMike Christie case ISCSI_PARAM_IFACE_NAME: 6871d063c17SMike Christie case ISCSI_PARAM_INITIATOR_NAME: 6886a06a4b8SOr Gerlitz case ISCSI_PARAM_DISCOVERY_SESS: 6893128c6c7SMike Christie return S_IRUGO; 6903128c6c7SMike Christie default: 6913128c6c7SMike Christie return 0; 6923128c6c7SMike Christie } 6933128c6c7SMike Christie } 6943128c6c7SMike Christie 6953128c6c7SMike Christie return 0; 6963128c6c7SMike Christie } 6973128c6c7SMike Christie 69865e7ae7bSOr Gerlitz static struct scsi_host_template iscsi_iser_sht = { 6997974392cSMike Christie .module = THIS_MODULE, 700c1d786e6SRoi Dayan .name = "iSCSI Initiator over iSER", 70165e7ae7bSOr Gerlitz .queuecommand = iscsi_queuecommand, 7026410627eSErez Zilber .change_queue_depth = iscsi_change_queue_depth, 70365e7ae7bSOr Gerlitz .sg_tablesize = ISCSI_ISER_SG_TABLESIZE, 7048072ec2fSErez Zilber .max_sectors = 1024, 705e28f3d5bSMike Christie .cmd_per_lun = ISER_DEF_CMD_PER_LUN, 70665e7ae7bSOr Gerlitz .eh_abort_handler = iscsi_eh_abort, 70790c18f3cSErez Zilber .eh_device_reset_handler= iscsi_eh_device_reset, 708309ce156SJayamohan Kallickal .eh_target_reset_handler = iscsi_eh_recover_target, 7096b5d6c44SMike Christie .target_alloc = iscsi_target_alloc, 71065e7ae7bSOr Gerlitz .use_clustering = DISABLE_CLUSTERING, 71165e7ae7bSOr Gerlitz .proc_name = "iscsi_iser", 71265e7ae7bSOr Gerlitz .this_id = -1, 71365e7ae7bSOr Gerlitz }; 71465e7ae7bSOr Gerlitz 71565e7ae7bSOr Gerlitz static struct iscsi_transport iscsi_iser_transport = { 71665e7ae7bSOr Gerlitz .owner = THIS_MODULE, 71765e7ae7bSOr Gerlitz .name = "iser", 7186a06a4b8SOr Gerlitz .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_TEXT_NEGO, 71965e7ae7bSOr Gerlitz /* session management */ 72065e7ae7bSOr Gerlitz .create_session = iscsi_iser_session_create, 72175613521SMike Christie .destroy_session = iscsi_iser_session_destroy, 72265e7ae7bSOr Gerlitz /* connection management */ 72365e7ae7bSOr Gerlitz .create_conn = iscsi_iser_conn_create, 72465e7ae7bSOr Gerlitz .bind_conn = iscsi_iser_conn_bind, 72565e7ae7bSOr Gerlitz .destroy_conn = iscsi_iser_conn_destroy, 7263128c6c7SMike Christie .attr_is_visible = iser_attr_is_visible, 727358ff019SMike Christie .set_param = iscsi_iser_set_param, 728358ff019SMike Christie .get_conn_param = iscsi_conn_get_param, 7297c53c6f8SMike Christie .get_ep_param = iscsi_iser_get_ep_param, 730358ff019SMike Christie .get_session_param = iscsi_session_get_param, 73189e984e2SOr Gerlitz .start_conn = iscsi_conn_start, 732b40977d9SMike Christie .stop_conn = iscsi_iser_conn_stop, 7330801c242SMike Christie /* iscsi host params */ 7340801c242SMike Christie .get_host_param = iscsi_host_get_param, 7350801c242SMike Christie .set_host_param = iscsi_host_set_param, 73665e7ae7bSOr Gerlitz /* IO */ 73765e7ae7bSOr Gerlitz .send_pdu = iscsi_conn_send_pdu, 73865e7ae7bSOr Gerlitz .get_stats = iscsi_iser_conn_get_stats, 7392747fdb2SMike Christie .init_task = iscsi_iser_task_init, 7402747fdb2SMike Christie .xmit_task = iscsi_iser_task_xmit, 7412747fdb2SMike Christie .cleanup_task = iscsi_iser_cleanup_task, 7420f9c7449SMike Christie .alloc_pdu = iscsi_iser_pdu_alloc, 74365e7ae7bSOr Gerlitz /* recovery */ 74465e7ae7bSOr Gerlitz .session_recovery_timedout = iscsi_session_recovery_timedout, 74565e7ae7bSOr Gerlitz 74665e7ae7bSOr Gerlitz .ep_connect = iscsi_iser_ep_connect, 74765e7ae7bSOr Gerlitz .ep_poll = iscsi_iser_ep_poll, 74865e7ae7bSOr Gerlitz .ep_disconnect = iscsi_iser_ep_disconnect 74965e7ae7bSOr Gerlitz }; 75065e7ae7bSOr Gerlitz 75165e7ae7bSOr Gerlitz static int __init iser_init(void) 75265e7ae7bSOr Gerlitz { 75365e7ae7bSOr Gerlitz int err; 75465e7ae7bSOr Gerlitz 75565e7ae7bSOr Gerlitz iser_dbg("Starting iSER datamover...\n"); 75665e7ae7bSOr Gerlitz 75765e7ae7bSOr Gerlitz if (iscsi_max_lun < 1) { 7584f363882SRoi Dayan iser_err("Invalid max_lun value of %u\n", iscsi_max_lun); 75965e7ae7bSOr Gerlitz return -EINVAL; 76065e7ae7bSOr Gerlitz } 76165e7ae7bSOr Gerlitz 76265e7ae7bSOr Gerlitz memset(&ig, 0, sizeof(struct iser_global)); 76365e7ae7bSOr Gerlitz 76465e7ae7bSOr Gerlitz ig.desc_cache = kmem_cache_create("iser_descriptors", 765f19624aaSOr Gerlitz sizeof(struct iser_tx_desc), 76665e7ae7bSOr Gerlitz 0, SLAB_HWCACHE_ALIGN, 76720c2df83SPaul Mundt NULL); 76865e7ae7bSOr Gerlitz if (ig.desc_cache == NULL) 76965e7ae7bSOr Gerlitz return -ENOMEM; 77065e7ae7bSOr Gerlitz 77165e7ae7bSOr Gerlitz /* device init is called only after the first addr resolution */ 77265e7ae7bSOr Gerlitz mutex_init(&ig.device_list_mutex); 77365e7ae7bSOr Gerlitz INIT_LIST_HEAD(&ig.device_list); 77465e7ae7bSOr Gerlitz mutex_init(&ig.connlist_mutex); 77565e7ae7bSOr Gerlitz INIT_LIST_HEAD(&ig.connlist); 77665e7ae7bSOr Gerlitz 77775613521SMike Christie iscsi_iser_scsi_transport = iscsi_register_transport( 77875613521SMike Christie &iscsi_iser_transport); 77975613521SMike Christie if (!iscsi_iser_scsi_transport) { 78065e7ae7bSOr Gerlitz iser_err("iscsi_register_transport failed\n"); 78165e7ae7bSOr Gerlitz err = -EINVAL; 78265e7ae7bSOr Gerlitz goto register_transport_failure; 78365e7ae7bSOr Gerlitz } 78465e7ae7bSOr Gerlitz 78565e7ae7bSOr Gerlitz return 0; 78665e7ae7bSOr Gerlitz 78765e7ae7bSOr Gerlitz register_transport_failure: 78865e7ae7bSOr Gerlitz kmem_cache_destroy(ig.desc_cache); 78965e7ae7bSOr Gerlitz 79065e7ae7bSOr Gerlitz return err; 79165e7ae7bSOr Gerlitz } 79265e7ae7bSOr Gerlitz 79365e7ae7bSOr Gerlitz static void __exit iser_exit(void) 79465e7ae7bSOr Gerlitz { 79565e7ae7bSOr Gerlitz iser_dbg("Removing iSER datamover...\n"); 79665e7ae7bSOr Gerlitz iscsi_unregister_transport(&iscsi_iser_transport); 79765e7ae7bSOr Gerlitz kmem_cache_destroy(ig.desc_cache); 79865e7ae7bSOr Gerlitz } 79965e7ae7bSOr Gerlitz 80065e7ae7bSOr Gerlitz module_init(iser_init); 80165e7ae7bSOr Gerlitz module_exit(iser_exit); 802