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. 865e7ae7bSOr Gerlitz * maintained by openib-general@openib.org 965e7ae7bSOr Gerlitz * 1065e7ae7bSOr Gerlitz * This software is available to you under a choice of one of two 1165e7ae7bSOr Gerlitz * licenses. You may choose to be licensed under the terms of the GNU 1265e7ae7bSOr Gerlitz * General Public License (GPL) Version 2, available from the file 1365e7ae7bSOr Gerlitz * COPYING in the main directory of this source tree, or the 1465e7ae7bSOr Gerlitz * OpenIB.org BSD license below: 1565e7ae7bSOr Gerlitz * 1665e7ae7bSOr Gerlitz * Redistribution and use in source and binary forms, with or 1765e7ae7bSOr Gerlitz * without modification, are permitted provided that the following 1865e7ae7bSOr Gerlitz * conditions are met: 1965e7ae7bSOr Gerlitz * 2065e7ae7bSOr Gerlitz * - Redistributions of source code must retain the above 2165e7ae7bSOr Gerlitz * copyright notice, this list of conditions and the following 2265e7ae7bSOr Gerlitz * disclaimer. 2365e7ae7bSOr Gerlitz * 2465e7ae7bSOr Gerlitz * - Redistributions in binary form must reproduce the above 2565e7ae7bSOr Gerlitz * copyright notice, this list of conditions and the following 2665e7ae7bSOr Gerlitz * disclaimer in the documentation and/or other materials 2765e7ae7bSOr Gerlitz * provided with the distribution. 2865e7ae7bSOr Gerlitz * 2965e7ae7bSOr Gerlitz * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 3065e7ae7bSOr Gerlitz * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 3165e7ae7bSOr Gerlitz * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 3265e7ae7bSOr Gerlitz * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 3365e7ae7bSOr Gerlitz * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 3465e7ae7bSOr Gerlitz * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 3565e7ae7bSOr Gerlitz * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 3665e7ae7bSOr Gerlitz * SOFTWARE. 3765e7ae7bSOr Gerlitz * 3865e7ae7bSOr Gerlitz * Credits: 3965e7ae7bSOr Gerlitz * Christoph Hellwig 4065e7ae7bSOr Gerlitz * FUJITA Tomonori 4165e7ae7bSOr Gerlitz * Arne Redlich 4265e7ae7bSOr Gerlitz * Zhenyu Wang 4365e7ae7bSOr Gerlitz * Modified by: 4465e7ae7bSOr Gerlitz * Erez Zilber 4565e7ae7bSOr Gerlitz */ 4665e7ae7bSOr Gerlitz 4765e7ae7bSOr Gerlitz #include <linux/types.h> 4865e7ae7bSOr Gerlitz #include <linux/list.h> 4965e7ae7bSOr Gerlitz #include <linux/hardirq.h> 5065e7ae7bSOr Gerlitz #include <linux/kfifo.h> 5165e7ae7bSOr Gerlitz #include <linux/blkdev.h> 5265e7ae7bSOr Gerlitz #include <linux/init.h> 5365e7ae7bSOr Gerlitz #include <linux/ioctl.h> 5465e7ae7bSOr Gerlitz #include <linux/cdev.h> 5565e7ae7bSOr Gerlitz #include <linux/in.h> 5665e7ae7bSOr Gerlitz #include <linux/net.h> 5765e7ae7bSOr Gerlitz #include <linux/scatterlist.h> 5865e7ae7bSOr Gerlitz #include <linux/delay.h> 595a0e3ad6STejun Heo #include <linux/slab.h> 6065e7ae7bSOr Gerlitz 6165e7ae7bSOr Gerlitz #include <net/sock.h> 6265e7ae7bSOr Gerlitz 6365e7ae7bSOr Gerlitz #include <asm/uaccess.h> 6465e7ae7bSOr Gerlitz 6565e7ae7bSOr Gerlitz #include <scsi/scsi_cmnd.h> 6665e7ae7bSOr Gerlitz #include <scsi/scsi_device.h> 6765e7ae7bSOr Gerlitz #include <scsi/scsi_eh.h> 6865e7ae7bSOr Gerlitz #include <scsi/scsi_tcq.h> 6965e7ae7bSOr Gerlitz #include <scsi/scsi_host.h> 7065e7ae7bSOr Gerlitz #include <scsi/scsi.h> 7165e7ae7bSOr Gerlitz #include <scsi/scsi_transport_iscsi.h> 7265e7ae7bSOr Gerlitz 7365e7ae7bSOr Gerlitz #include "iscsi_iser.h" 7465e7ae7bSOr Gerlitz 7575613521SMike Christie static struct scsi_host_template iscsi_iser_sht; 7675613521SMike Christie static struct iscsi_transport iscsi_iser_transport; 7775613521SMike Christie static struct scsi_transport_template *iscsi_iser_scsi_transport; 7875613521SMike Christie 7965e7ae7bSOr Gerlitz static unsigned int iscsi_max_lun = 512; 8065e7ae7bSOr Gerlitz module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); 8165e7ae7bSOr Gerlitz 8265e7ae7bSOr Gerlitz int iser_debug_level = 0; 8365e7ae7bSOr Gerlitz 8465e7ae7bSOr Gerlitz MODULE_DESCRIPTION("iSER (iSCSI Extensions for RDMA) Datamover " 8565e7ae7bSOr Gerlitz "v" DRV_VER " (" DRV_DATE ")"); 8665e7ae7bSOr Gerlitz MODULE_LICENSE("Dual BSD/GPL"); 8765e7ae7bSOr Gerlitz MODULE_AUTHOR("Alex Nezhinsky, Dan Bar Dov, Or Gerlitz"); 8865e7ae7bSOr Gerlitz 8965e7ae7bSOr Gerlitz module_param_named(debug_level, iser_debug_level, int, 0644); 9065e7ae7bSOr Gerlitz MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:disabled)"); 9165e7ae7bSOr Gerlitz 9265e7ae7bSOr Gerlitz struct iser_global ig; 9365e7ae7bSOr Gerlitz 9465e7ae7bSOr Gerlitz void 9565e7ae7bSOr Gerlitz iscsi_iser_recv(struct iscsi_conn *conn, 9665e7ae7bSOr Gerlitz struct iscsi_hdr *hdr, char *rx_data, int rx_data_len) 9765e7ae7bSOr Gerlitz { 9865e7ae7bSOr Gerlitz int rc = 0; 9965e7ae7bSOr Gerlitz int datalen; 10065e7ae7bSOr Gerlitz int ahslen; 10165e7ae7bSOr Gerlitz 10265e7ae7bSOr Gerlitz /* verify PDU length */ 10365e7ae7bSOr Gerlitz datalen = ntoh24(hdr->dlength); 104200ae1a0SOr Gerlitz if (datalen > rx_data_len || (datalen + 4) < rx_data_len) { 105200ae1a0SOr Gerlitz iser_err("wrong datalen %d (hdr), %d (IB)\n", 10665e7ae7bSOr Gerlitz datalen, rx_data_len); 10765e7ae7bSOr Gerlitz rc = ISCSI_ERR_DATALEN; 10865e7ae7bSOr Gerlitz goto error; 10965e7ae7bSOr Gerlitz } 11065e7ae7bSOr Gerlitz 111200ae1a0SOr Gerlitz if (datalen != rx_data_len) 112200ae1a0SOr Gerlitz iser_dbg("aligned datalen (%d) hdr, %d (IB)\n", 113200ae1a0SOr Gerlitz datalen, rx_data_len); 114200ae1a0SOr Gerlitz 11565e7ae7bSOr Gerlitz /* read AHS */ 11665e7ae7bSOr Gerlitz ahslen = hdr->hlength * 4; 11765e7ae7bSOr Gerlitz 11865e7ae7bSOr Gerlitz rc = iscsi_complete_pdu(conn, hdr, rx_data, rx_data_len); 11965e7ae7bSOr Gerlitz if (rc && rc != ISCSI_ERR_NO_SCSI_CMD) 12065e7ae7bSOr Gerlitz goto error; 12165e7ae7bSOr Gerlitz 12265e7ae7bSOr Gerlitz return; 12365e7ae7bSOr Gerlitz error: 12465e7ae7bSOr Gerlitz iscsi_conn_failure(conn, rc); 12565e7ae7bSOr Gerlitz } 12665e7ae7bSOr Gerlitz 1272ff79d52SMike Christie static int iscsi_iser_pdu_alloc(struct iscsi_task *task, uint8_t opcode) 1280f9c7449SMike Christie { 1290f9c7449SMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 1300f9c7449SMike Christie 1310f9c7449SMike Christie task->hdr = (struct iscsi_hdr *)&iser_task->desc.iscsi_header; 1320f9c7449SMike Christie task->hdr_max = sizeof(iser_task->desc.iscsi_header); 1330f9c7449SMike Christie return 0; 1340f9c7449SMike Christie } 13565e7ae7bSOr Gerlitz 136f19624aaSOr Gerlitz int iser_initialize_task_headers(struct iscsi_task *task, 137f19624aaSOr Gerlitz struct iser_tx_desc *tx_desc) 138f19624aaSOr Gerlitz { 139f19624aaSOr Gerlitz struct iscsi_iser_conn *iser_conn = task->conn->dd_data; 140f19624aaSOr Gerlitz struct iser_device *device = iser_conn->ib_conn->device; 141f19624aaSOr Gerlitz struct iscsi_iser_task *iser_task = task->dd_data; 142f19624aaSOr Gerlitz u64 dma_addr; 143f19624aaSOr Gerlitz 144f19624aaSOr Gerlitz dma_addr = ib_dma_map_single(device->ib_device, (void *)tx_desc, 145f19624aaSOr Gerlitz ISER_HEADERS_LEN, DMA_TO_DEVICE); 146f19624aaSOr Gerlitz if (ib_dma_mapping_error(device->ib_device, dma_addr)) 147f19624aaSOr Gerlitz return -ENOMEM; 148f19624aaSOr Gerlitz 149f19624aaSOr Gerlitz tx_desc->dma_addr = dma_addr; 150f19624aaSOr Gerlitz tx_desc->tx_sg[0].addr = tx_desc->dma_addr; 151f19624aaSOr Gerlitz tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; 152f19624aaSOr Gerlitz tx_desc->tx_sg[0].lkey = device->mr->lkey; 153f19624aaSOr Gerlitz 154f19624aaSOr Gerlitz iser_task->iser_conn = iser_conn; 155f19624aaSOr Gerlitz return 0; 156f19624aaSOr Gerlitz } 15765e7ae7bSOr Gerlitz /** 1582261ec3dSMike Christie * iscsi_iser_task_init - Initialize task 1592261ec3dSMike Christie * @task: iscsi task 16065e7ae7bSOr Gerlitz * 1612261ec3dSMike Christie * Initialize the task for the scsi command or mgmt command. 1622747fdb2SMike Christie */ 163a8ac6311SOlaf Kirch static int 1642261ec3dSMike Christie iscsi_iser_task_init(struct iscsi_task *task) 16565e7ae7bSOr Gerlitz { 1662261ec3dSMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 16765e7ae7bSOr Gerlitz 168f19624aaSOr Gerlitz if (iser_initialize_task_headers(task, &iser_task->desc)) 169f19624aaSOr Gerlitz return -ENOMEM; 170f19624aaSOr Gerlitz 1712261ec3dSMike Christie /* mgmt task */ 172f19624aaSOr Gerlitz if (!task->sc) 1732747fdb2SMike Christie return 0; 1742747fdb2SMike Christie 1752261ec3dSMike Christie iser_task->command_sent = 0; 1762261ec3dSMike Christie iser_task_rdma_init(iser_task); 177a8ac6311SOlaf Kirch return 0; 17865e7ae7bSOr Gerlitz } 17965e7ae7bSOr Gerlitz 18065e7ae7bSOr Gerlitz /** 1812261ec3dSMike Christie * iscsi_iser_mtask_xmit - xmit management(immediate) task 18265e7ae7bSOr Gerlitz * @conn: iscsi connection 1832261ec3dSMike Christie * @task: task management task 18465e7ae7bSOr Gerlitz * 18565e7ae7bSOr Gerlitz * Notes: 18665e7ae7bSOr Gerlitz * The function can return -EAGAIN in which case caller must 18765e7ae7bSOr Gerlitz * call it again later, or recover. '0' return code means successful 18865e7ae7bSOr Gerlitz * xmit. 18965e7ae7bSOr Gerlitz * 19065e7ae7bSOr Gerlitz **/ 19165e7ae7bSOr Gerlitz static int 1922261ec3dSMike Christie iscsi_iser_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 19365e7ae7bSOr Gerlitz { 19465e7ae7bSOr Gerlitz int error = 0; 19565e7ae7bSOr Gerlitz 196962b4b52SOr Gerlitz iser_dbg("mtask xmit [cid %d itt 0x%x]\n", conn->id, task->itt); 19765e7ae7bSOr Gerlitz 1982261ec3dSMike Christie error = iser_send_control(conn, task); 19965e7ae7bSOr Gerlitz 2002261ec3dSMike Christie /* since iser xmits control with zero copy, tasks can not be recycled 20165e7ae7bSOr Gerlitz * right after sending them. 20265e7ae7bSOr Gerlitz * The recycling scheme is based on whether a response is expected 2032261ec3dSMike Christie * - if yes, the task is recycled at iscsi_complete_pdu 2042261ec3dSMike Christie * - if no, the task is recycled at iser_snd_completion 20565e7ae7bSOr Gerlitz */ 20665e7ae7bSOr Gerlitz return error; 20765e7ae7bSOr Gerlitz } 20865e7ae7bSOr Gerlitz 20965e7ae7bSOr Gerlitz static int 2102747fdb2SMike Christie iscsi_iser_task_xmit_unsol_data(struct iscsi_conn *conn, 2112261ec3dSMike Christie struct iscsi_task *task) 21265e7ae7bSOr Gerlitz { 2130f9c7449SMike Christie struct iscsi_r2t_info *r2t = &task->unsol_r2t; 21465e7ae7bSOr Gerlitz struct iscsi_data hdr; 21565e7ae7bSOr Gerlitz int error = 0; 21665e7ae7bSOr Gerlitz 21765e7ae7bSOr Gerlitz /* Send data-out PDUs while there's still unsolicited data to send */ 2180f9c7449SMike Christie while (iscsi_task_has_unsol_data(task)) { 2190f9c7449SMike Christie iscsi_prep_data_out_pdu(task, r2t, &hdr); 22048a237a2SMike Christie iser_dbg("Sending data-out: itt 0x%x, data count %d\n", 2210f9c7449SMike Christie hdr.itt, r2t->data_count); 22265e7ae7bSOr Gerlitz 22365e7ae7bSOr Gerlitz /* the buffer description has been passed with the command */ 22465e7ae7bSOr Gerlitz /* Send the command */ 2252261ec3dSMike Christie error = iser_send_data_out(conn, task, &hdr); 22665e7ae7bSOr Gerlitz if (error) { 2270f9c7449SMike Christie r2t->datasn--; 2282747fdb2SMike Christie goto iscsi_iser_task_xmit_unsol_data_exit; 22965e7ae7bSOr Gerlitz } 2300f9c7449SMike Christie r2t->sent += r2t->data_count; 23148a237a2SMike Christie iser_dbg("Need to send %d more as data-out PDUs\n", 2320f9c7449SMike Christie r2t->data_length - r2t->sent); 23365e7ae7bSOr Gerlitz } 23465e7ae7bSOr Gerlitz 2352747fdb2SMike Christie iscsi_iser_task_xmit_unsol_data_exit: 23665e7ae7bSOr Gerlitz return error; 23765e7ae7bSOr Gerlitz } 23865e7ae7bSOr Gerlitz 23965e7ae7bSOr Gerlitz static int 2402261ec3dSMike Christie iscsi_iser_task_xmit(struct iscsi_task *task) 24165e7ae7bSOr Gerlitz { 2422261ec3dSMike Christie struct iscsi_conn *conn = task->conn; 2432261ec3dSMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 24465e7ae7bSOr Gerlitz int error = 0; 24565e7ae7bSOr Gerlitz 2462261ec3dSMike Christie if (!task->sc) 2472261ec3dSMike Christie return iscsi_iser_mtask_xmit(conn, task); 2482747fdb2SMike Christie 2492261ec3dSMike Christie if (task->sc->sc_data_direction == DMA_TO_DEVICE) { 2502261ec3dSMike Christie BUG_ON(scsi_bufflen(task->sc) == 0); 25177a23c21SMike Christie 25248a237a2SMike Christie iser_dbg("cmd [itt %x total %d imm %d unsol_data %d\n", 2532261ec3dSMike Christie task->itt, scsi_bufflen(task->sc), 2540f9c7449SMike Christie task->imm_count, task->unsol_r2t.data_length); 25577a23c21SMike Christie } 25677a23c21SMike Christie 257962b4b52SOr Gerlitz iser_dbg("ctask xmit [cid %d itt 0x%x]\n", 2582261ec3dSMike Christie conn->id, task->itt); 25965e7ae7bSOr Gerlitz 26065e7ae7bSOr Gerlitz /* Send the cmd PDU */ 2612261ec3dSMike Christie if (!iser_task->command_sent) { 2622261ec3dSMike Christie error = iser_send_command(conn, task); 26365e7ae7bSOr Gerlitz if (error) 2642747fdb2SMike Christie goto iscsi_iser_task_xmit_exit; 2652261ec3dSMike Christie iser_task->command_sent = 1; 26665e7ae7bSOr Gerlitz } 26765e7ae7bSOr Gerlitz 26865e7ae7bSOr Gerlitz /* Send unsolicited data-out PDU(s) if necessary */ 2690f9c7449SMike Christie if (iscsi_task_has_unsol_data(task)) 2702261ec3dSMike Christie error = iscsi_iser_task_xmit_unsol_data(conn, task); 27165e7ae7bSOr Gerlitz 2722747fdb2SMike Christie iscsi_iser_task_xmit_exit: 27365e7ae7bSOr Gerlitz return error; 27465e7ae7bSOr Gerlitz } 27565e7ae7bSOr Gerlitz 2760f9c7449SMike Christie static void iscsi_iser_cleanup_task(struct iscsi_task *task) 27765e7ae7bSOr Gerlitz { 2782261ec3dSMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 27952439540SOr Gerlitz struct iser_tx_desc *tx_desc = &iser_task->desc; 28052439540SOr Gerlitz 28152439540SOr Gerlitz struct iscsi_iser_conn *iser_conn = task->conn->dd_data; 28252439540SOr Gerlitz struct iser_device *device = iser_conn->ib_conn->device; 28352439540SOr Gerlitz 28452439540SOr Gerlitz ib_dma_unmap_single(device->ib_device, 28552439540SOr Gerlitz tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE); 28665e7ae7bSOr Gerlitz 287b3cd5050SMike Christie /* mgmt tasks do not need special cleanup */ 288b3cd5050SMike Christie if (!task->sc) 2892747fdb2SMike Christie return; 29065e7ae7bSOr Gerlitz 2912261ec3dSMike Christie if (iser_task->status == ISER_TASK_STATUS_STARTED) { 2922261ec3dSMike Christie iser_task->status = ISER_TASK_STATUS_COMPLETED; 2932261ec3dSMike Christie iser_task_rdma_finalize(iser_task); 29465e7ae7bSOr Gerlitz } 29565e7ae7bSOr Gerlitz } 29665e7ae7bSOr Gerlitz 29765e7ae7bSOr Gerlitz static struct iscsi_cls_conn * 29865e7ae7bSOr Gerlitz iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) 29965e7ae7bSOr Gerlitz { 30065e7ae7bSOr Gerlitz struct iscsi_conn *conn; 30165e7ae7bSOr Gerlitz struct iscsi_cls_conn *cls_conn; 30265e7ae7bSOr Gerlitz struct iscsi_iser_conn *iser_conn; 30365e7ae7bSOr Gerlitz 3045d91e209SMike Christie cls_conn = iscsi_conn_setup(cls_session, sizeof(*iser_conn), conn_idx); 30565e7ae7bSOr Gerlitz if (!cls_conn) 30665e7ae7bSOr Gerlitz return NULL; 30765e7ae7bSOr Gerlitz conn = cls_conn->dd_data; 30865e7ae7bSOr Gerlitz 30965e7ae7bSOr Gerlitz /* 31065e7ae7bSOr Gerlitz * due to issues with the login code re iser sematics 31165e7ae7bSOr Gerlitz * this not set in iscsi_conn_setup - FIXME 31265e7ae7bSOr Gerlitz */ 313bcc60c38SOr Gerlitz conn->max_recv_dlength = ISER_RECV_DATA_SEG_LEN; 31465e7ae7bSOr Gerlitz 3155d91e209SMike Christie iser_conn = conn->dd_data; 31665e7ae7bSOr Gerlitz conn->dd_data = iser_conn; 31765e7ae7bSOr Gerlitz iser_conn->iscsi_conn = conn; 31865e7ae7bSOr Gerlitz 31965e7ae7bSOr Gerlitz return cls_conn; 32065e7ae7bSOr Gerlitz } 32165e7ae7bSOr Gerlitz 32265e7ae7bSOr Gerlitz static void 32365e7ae7bSOr Gerlitz iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn) 32465e7ae7bSOr Gerlitz { 32565e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 32665e7ae7bSOr Gerlitz struct iscsi_iser_conn *iser_conn = conn->dd_data; 327b40977d9SMike Christie struct iser_conn *ib_conn = iser_conn->ib_conn; 32865e7ae7bSOr Gerlitz 32965e7ae7bSOr Gerlitz iscsi_conn_teardown(cls_conn); 330b40977d9SMike Christie /* 331b40977d9SMike Christie * Userspace will normally call the stop callback and 332b40977d9SMike Christie * already have freed the ib_conn, but if it goofed up then 333b40977d9SMike Christie * we free it here. 334b40977d9SMike Christie */ 335b40977d9SMike Christie if (ib_conn) { 336b40977d9SMike Christie ib_conn->iser_conn = NULL; 33739ff05dbSOr Gerlitz iser_conn_put(ib_conn, 1); /* deref iscsi/ib conn unbinding */ 338b40977d9SMike Christie } 33965e7ae7bSOr Gerlitz } 34065e7ae7bSOr Gerlitz 34165e7ae7bSOr Gerlitz static int 34265e7ae7bSOr Gerlitz iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session, 34365e7ae7bSOr Gerlitz struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, 34465e7ae7bSOr Gerlitz int is_leading) 34565e7ae7bSOr Gerlitz { 34665e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 34765e7ae7bSOr Gerlitz struct iscsi_iser_conn *iser_conn; 34865e7ae7bSOr Gerlitz struct iser_conn *ib_conn; 349412eeafaSMike Christie struct iscsi_endpoint *ep; 35065e7ae7bSOr Gerlitz int error; 35165e7ae7bSOr Gerlitz 35265e7ae7bSOr Gerlitz error = iscsi_conn_bind(cls_session, cls_conn, is_leading); 35365e7ae7bSOr Gerlitz if (error) 35465e7ae7bSOr Gerlitz return error; 35565e7ae7bSOr Gerlitz 35665e7ae7bSOr Gerlitz /* the transport ep handle comes from user space so it must be 35765e7ae7bSOr Gerlitz * verified against the global ib connections list */ 358412eeafaSMike Christie ep = iscsi_lookup_endpoint(transport_eph); 359412eeafaSMike Christie if (!ep) { 36065e7ae7bSOr Gerlitz iser_err("can't bind eph %llx\n", 36165e7ae7bSOr Gerlitz (unsigned long long)transport_eph); 36265e7ae7bSOr Gerlitz return -EINVAL; 36365e7ae7bSOr Gerlitz } 364412eeafaSMike Christie ib_conn = ep->dd_data; 365412eeafaSMike Christie 36665e7ae7bSOr Gerlitz /* binds the iSER connection retrieved from the previously 36765e7ae7bSOr Gerlitz * connected ep_handle to the iSCSI layer connection. exchanges 36865e7ae7bSOr Gerlitz * connection pointers */ 36939ff05dbSOr Gerlitz iser_err("binding iscsi/iser conn %p %p to ib_conn %p\n", 37039ff05dbSOr Gerlitz conn, conn->dd_data, ib_conn); 37165e7ae7bSOr Gerlitz iser_conn = conn->dd_data; 37265e7ae7bSOr Gerlitz ib_conn->iser_conn = iser_conn; 37365e7ae7bSOr Gerlitz iser_conn->ib_conn = ib_conn; 37439ff05dbSOr Gerlitz iser_conn_get(ib_conn); /* ref iscsi/ib conn binding */ 37565e7ae7bSOr Gerlitz return 0; 37665e7ae7bSOr Gerlitz } 37765e7ae7bSOr Gerlitz 378b40977d9SMike Christie static void 379b40977d9SMike Christie iscsi_iser_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) 380b40977d9SMike Christie { 381b40977d9SMike Christie struct iscsi_conn *conn = cls_conn->dd_data; 382b40977d9SMike Christie struct iscsi_iser_conn *iser_conn = conn->dd_data; 383b40977d9SMike Christie struct iser_conn *ib_conn = iser_conn->ib_conn; 384b40977d9SMike Christie 385913e5bf4SMike Christie /* 386913e5bf4SMike Christie * Userspace may have goofed up and not bound the connection or 387913e5bf4SMike Christie * might have only partially setup the connection. 388913e5bf4SMike Christie */ 389913e5bf4SMike Christie if (ib_conn) { 390b40977d9SMike Christie iscsi_conn_stop(cls_conn, flag); 391b40977d9SMike Christie /* 392b40977d9SMike Christie * There is no unbind event so the stop callback 393b40977d9SMike Christie * must release the ref from the bind. 394b40977d9SMike Christie */ 39539ff05dbSOr Gerlitz iser_conn_put(ib_conn, 1); /* deref iscsi/ib conn unbinding */ 396913e5bf4SMike Christie } 397b40977d9SMike Christie iser_conn->ib_conn = NULL; 398b40977d9SMike Christie } 399b40977d9SMike Christie 40065e7ae7bSOr Gerlitz static int 40165e7ae7bSOr Gerlitz iscsi_iser_conn_start(struct iscsi_cls_conn *cls_conn) 40265e7ae7bSOr Gerlitz { 40365e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 40465e7ae7bSOr Gerlitz int err; 40565e7ae7bSOr Gerlitz 4062e7a7426SErez Zilber err = iser_conn_set_full_featured_mode(conn); 40765e7ae7bSOr Gerlitz if (err) 40865e7ae7bSOr Gerlitz return err; 40965e7ae7bSOr Gerlitz 4102e7a7426SErez Zilber return iscsi_conn_start(cls_conn); 41165e7ae7bSOr Gerlitz } 41265e7ae7bSOr Gerlitz 41375613521SMike Christie static void iscsi_iser_session_destroy(struct iscsi_cls_session *cls_session) 41475613521SMike Christie { 41575613521SMike Christie struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 41675613521SMike Christie 417e5bd7b54SMike Christie iscsi_session_teardown(cls_session); 418a4804cd6SMike Christie iscsi_host_remove(shost); 419a4804cd6SMike Christie iscsi_host_free(shost); 42075613521SMike Christie } 42165e7ae7bSOr Gerlitz 42265e7ae7bSOr Gerlitz static struct iscsi_cls_session * 423412eeafaSMike Christie iscsi_iser_session_create(struct iscsi_endpoint *ep, 4241548271eSMike Christie uint16_t cmds_max, uint16_t qdepth, 4255e7facb7SMike Christie uint32_t initial_cmdsn) 42665e7ae7bSOr Gerlitz { 42765e7ae7bSOr Gerlitz struct iscsi_cls_session *cls_session; 42865e7ae7bSOr Gerlitz struct iscsi_session *session; 429412eeafaSMike Christie struct Scsi_Host *shost; 430412eeafaSMike Christie struct iser_conn *ib_conn; 43175613521SMike Christie 432962b4b52SOr Gerlitz shost = iscsi_host_alloc(&iscsi_iser_sht, 0, 0); 43375613521SMike Christie if (!shost) 43475613521SMike Christie return NULL; 43575613521SMike Christie shost->transportt = iscsi_iser_scsi_transport; 43675613521SMike Christie shost->max_lun = iscsi_max_lun; 43775613521SMike Christie shost->max_id = 0; 43875613521SMike Christie shost->max_channel = 0; 43975613521SMike Christie shost->max_cmd_len = 16; 44075613521SMike Christie 441412eeafaSMike Christie /* 442412eeafaSMike Christie * older userspace tools (before 2.0-870) did not pass us 443412eeafaSMike Christie * the leading conn's ep so this will be NULL; 444412eeafaSMike Christie */ 445412eeafaSMike Christie if (ep) 446412eeafaSMike Christie ib_conn = ep->dd_data; 447412eeafaSMike Christie 448412eeafaSMike Christie if (iscsi_host_add(shost, 449412eeafaSMike Christie ep ? ib_conn->device->ib_device->dma_device : NULL)) 45075613521SMike Christie goto free_host; 45165e7ae7bSOr Gerlitz 4521548271eSMike Christie /* 4531548271eSMike Christie * we do not support setting can_queue cmd_per_lun from userspace yet 4541548271eSMike Christie * because we preallocate so many resources 4551548271eSMike Christie */ 45675613521SMike Christie cls_session = iscsi_session_setup(&iscsi_iser_transport, shost, 457b8b9e1b8SJayamohan Kallickal ISCSI_DEF_XMIT_CMDS_MAX, 0, 4582261ec3dSMike Christie sizeof(struct iscsi_iser_task), 4597970634bSMike Christie initial_cmdsn, 0); 46065e7ae7bSOr Gerlitz if (!cls_session) 46175613521SMike Christie goto remove_host; 46275613521SMike Christie session = cls_session->dd_data; 46365e7ae7bSOr Gerlitz 4642747fdb2SMike Christie shost->can_queue = session->scsi_cmds_max; 46565e7ae7bSOr Gerlitz return cls_session; 46675613521SMike Christie 46775613521SMike Christie remove_host: 468a4804cd6SMike Christie iscsi_host_remove(shost); 46975613521SMike Christie free_host: 470a4804cd6SMike Christie iscsi_host_free(shost); 47175613521SMike Christie return NULL; 47265e7ae7bSOr Gerlitz } 47365e7ae7bSOr Gerlitz 47465e7ae7bSOr Gerlitz static int 475358ff019SMike Christie iscsi_iser_set_param(struct iscsi_cls_conn *cls_conn, 476358ff019SMike Christie enum iscsi_param param, char *buf, int buflen) 47765e7ae7bSOr Gerlitz { 478358ff019SMike Christie int value; 47965e7ae7bSOr Gerlitz 48065e7ae7bSOr Gerlitz switch (param) { 48165e7ae7bSOr Gerlitz case ISCSI_PARAM_MAX_RECV_DLENGTH: 48265e7ae7bSOr Gerlitz /* TBD */ 48365e7ae7bSOr Gerlitz break; 48465e7ae7bSOr Gerlitz case ISCSI_PARAM_HDRDGST_EN: 485358ff019SMike Christie sscanf(buf, "%d", &value); 48665e7ae7bSOr Gerlitz if (value) { 48765e7ae7bSOr Gerlitz printk(KERN_ERR "DataDigest wasn't negotiated to None"); 48865e7ae7bSOr Gerlitz return -EPROTO; 48965e7ae7bSOr Gerlitz } 49065e7ae7bSOr Gerlitz break; 49165e7ae7bSOr Gerlitz case ISCSI_PARAM_DATADGST_EN: 492358ff019SMike Christie sscanf(buf, "%d", &value); 49365e7ae7bSOr Gerlitz if (value) { 49465e7ae7bSOr Gerlitz printk(KERN_ERR "DataDigest wasn't negotiated to None"); 49565e7ae7bSOr Gerlitz return -EPROTO; 49665e7ae7bSOr Gerlitz } 49765e7ae7bSOr Gerlitz break; 49865e7ae7bSOr Gerlitz case ISCSI_PARAM_IFMARKER_EN: 499358ff019SMike Christie sscanf(buf, "%d", &value); 50065e7ae7bSOr Gerlitz if (value) { 50165e7ae7bSOr Gerlitz printk(KERN_ERR "IFMarker wasn't negotiated to No"); 50265e7ae7bSOr Gerlitz return -EPROTO; 50365e7ae7bSOr Gerlitz } 50465e7ae7bSOr Gerlitz break; 50565e7ae7bSOr Gerlitz case ISCSI_PARAM_OFMARKER_EN: 506358ff019SMike Christie sscanf(buf, "%d", &value); 50765e7ae7bSOr Gerlitz if (value) { 50865e7ae7bSOr Gerlitz printk(KERN_ERR "OFMarker wasn't negotiated to No"); 50965e7ae7bSOr Gerlitz return -EPROTO; 51065e7ae7bSOr Gerlitz } 51165e7ae7bSOr Gerlitz break; 51265e7ae7bSOr Gerlitz default: 513358ff019SMike Christie return iscsi_set_param(cls_conn, param, buf, buflen); 51465e7ae7bSOr Gerlitz } 51565e7ae7bSOr Gerlitz 51665e7ae7bSOr Gerlitz return 0; 51765e7ae7bSOr Gerlitz } 51865e7ae7bSOr Gerlitz 51965e7ae7bSOr Gerlitz static void 52065e7ae7bSOr Gerlitz iscsi_iser_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) 52165e7ae7bSOr Gerlitz { 52265e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 52365e7ae7bSOr Gerlitz 52465e7ae7bSOr Gerlitz stats->txdata_octets = conn->txdata_octets; 52565e7ae7bSOr Gerlitz stats->rxdata_octets = conn->rxdata_octets; 52665e7ae7bSOr Gerlitz stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 52765e7ae7bSOr Gerlitz stats->dataout_pdus = conn->dataout_pdus_cnt; 52865e7ae7bSOr Gerlitz stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 52965e7ae7bSOr Gerlitz stats->datain_pdus = conn->datain_pdus_cnt; /* always 0 */ 53065e7ae7bSOr Gerlitz stats->r2t_pdus = conn->r2t_pdus_cnt; /* always 0 */ 53165e7ae7bSOr Gerlitz stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 53265e7ae7bSOr Gerlitz stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 53387528227SEli Dorfman stats->custom_length = 4; 53465e7ae7bSOr Gerlitz strcpy(stats->custom[0].desc, "qp_tx_queue_full"); 53565e7ae7bSOr Gerlitz stats->custom[0].value = 0; /* TB iser_conn->qp_tx_queue_full; */ 53665e7ae7bSOr Gerlitz strcpy(stats->custom[1].desc, "fmr_map_not_avail"); 53765e7ae7bSOr Gerlitz stats->custom[1].value = 0; /* TB iser_conn->fmr_map_not_avail */; 53865e7ae7bSOr Gerlitz strcpy(stats->custom[2].desc, "eh_abort_cnt"); 53965e7ae7bSOr Gerlitz stats->custom[2].value = conn->eh_abort_cnt; 54087528227SEli Dorfman strcpy(stats->custom[3].desc, "fmr_unalign_cnt"); 54187528227SEli Dorfman stats->custom[3].value = conn->fmr_unalign_cnt; 54265e7ae7bSOr Gerlitz } 54365e7ae7bSOr Gerlitz 5447c53c6f8SMike Christie static int iscsi_iser_get_ep_param(struct iscsi_endpoint *ep, 5457c53c6f8SMike Christie enum iscsi_param param, char *buf) 5467c53c6f8SMike Christie { 5477c53c6f8SMike Christie struct iser_conn *ib_conn = ep->dd_data; 5487c53c6f8SMike Christie int len; 5497c53c6f8SMike Christie 5507c53c6f8SMike Christie switch (param) { 5517c53c6f8SMike Christie case ISCSI_PARAM_CONN_PORT: 5527c53c6f8SMike Christie case ISCSI_PARAM_CONN_ADDRESS: 5537c53c6f8SMike Christie if (!ib_conn || !ib_conn->cma_id) 5547c53c6f8SMike Christie return -ENOTCONN; 5557c53c6f8SMike Christie 5567c53c6f8SMike Christie return iscsi_conn_get_addr_param((struct sockaddr_storage *) 5577c53c6f8SMike Christie &ib_conn->cma_id->route.addr.dst_addr, 5587c53c6f8SMike Christie param, buf); 5597c53c6f8SMike Christie break; 5607c53c6f8SMike Christie default: 5617c53c6f8SMike Christie return -ENOSYS; 5627c53c6f8SMike Christie } 5637c53c6f8SMike Christie 5647c53c6f8SMike Christie return len; 5657c53c6f8SMike Christie } 5667c53c6f8SMike Christie 567412eeafaSMike Christie static struct iscsi_endpoint * 56810eb0f01SMike Christie iscsi_iser_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 56910eb0f01SMike Christie int non_blocking) 57065e7ae7bSOr Gerlitz { 57165e7ae7bSOr Gerlitz int err; 57265e7ae7bSOr Gerlitz struct iser_conn *ib_conn; 573412eeafaSMike Christie struct iscsi_endpoint *ep; 57465e7ae7bSOr Gerlitz 575412eeafaSMike Christie ep = iscsi_create_endpoint(sizeof(*ib_conn)); 576412eeafaSMike Christie if (!ep) 577412eeafaSMike Christie return ERR_PTR(-ENOMEM); 57865e7ae7bSOr Gerlitz 579412eeafaSMike Christie ib_conn = ep->dd_data; 580412eeafaSMike Christie ib_conn->ep = ep; 581412eeafaSMike Christie iser_conn_init(ib_conn); 58265e7ae7bSOr Gerlitz 583412eeafaSMike Christie err = iser_connect(ib_conn, NULL, (struct sockaddr_in *)dst_addr, 584412eeafaSMike Christie non_blocking); 585412eeafaSMike Christie if (err) { 586412eeafaSMike Christie iscsi_destroy_endpoint(ep); 587412eeafaSMike Christie return ERR_PTR(err); 588412eeafaSMike Christie } 589412eeafaSMike Christie return ep; 59065e7ae7bSOr Gerlitz } 59165e7ae7bSOr Gerlitz 59265e7ae7bSOr Gerlitz static int 593412eeafaSMike Christie iscsi_iser_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 59465e7ae7bSOr Gerlitz { 595412eeafaSMike Christie struct iser_conn *ib_conn; 59665e7ae7bSOr Gerlitz int rc; 59765e7ae7bSOr Gerlitz 598412eeafaSMike Christie ib_conn = ep->dd_data; 59965e7ae7bSOr Gerlitz rc = wait_event_interruptible_timeout(ib_conn->wait, 60065e7ae7bSOr Gerlitz ib_conn->state == ISER_CONN_UP, 60165e7ae7bSOr Gerlitz msecs_to_jiffies(timeout_ms)); 60265e7ae7bSOr Gerlitz 60365e7ae7bSOr Gerlitz /* if conn establishment failed, return error code to iscsi */ 60465e7ae7bSOr Gerlitz if (!rc && 60565e7ae7bSOr Gerlitz (ib_conn->state == ISER_CONN_TERMINATING || 60665e7ae7bSOr Gerlitz ib_conn->state == ISER_CONN_DOWN)) 60765e7ae7bSOr Gerlitz rc = -1; 60865e7ae7bSOr Gerlitz 60965e7ae7bSOr Gerlitz iser_err("ib conn %p rc = %d\n", ib_conn, rc); 61065e7ae7bSOr Gerlitz 61165e7ae7bSOr Gerlitz if (rc > 0) 61265e7ae7bSOr Gerlitz return 1; /* success, this is the equivalent of POLLOUT */ 61365e7ae7bSOr Gerlitz else if (!rc) 61465e7ae7bSOr Gerlitz return 0; /* timeout */ 61565e7ae7bSOr Gerlitz else 61665e7ae7bSOr Gerlitz return rc; /* signal */ 61765e7ae7bSOr Gerlitz } 61865e7ae7bSOr Gerlitz 61965e7ae7bSOr Gerlitz static void 620412eeafaSMike Christie iscsi_iser_ep_disconnect(struct iscsi_endpoint *ep) 62165e7ae7bSOr Gerlitz { 6221c83469dSMike Christie struct iser_conn *ib_conn; 62365e7ae7bSOr Gerlitz 624412eeafaSMike Christie ib_conn = ep->dd_data; 625b40977d9SMike Christie if (ib_conn->iser_conn) 626b40977d9SMike Christie /* 627b40977d9SMike Christie * Must suspend xmit path if the ep is bound to the 628b40977d9SMike Christie * iscsi_conn, so we know we are not accessing the ib_conn 629b40977d9SMike Christie * when we free it. 630b40977d9SMike Christie * 631b40977d9SMike Christie * This may not be bound if the ep poll failed. 632b40977d9SMike Christie */ 633b40977d9SMike Christie iscsi_suspend_tx(ib_conn->iser_conn->iscsi_conn); 634b40977d9SMike Christie 63565e7ae7bSOr Gerlitz 63665e7ae7bSOr Gerlitz iser_err("ib conn %p state %d\n",ib_conn, ib_conn->state); 63765e7ae7bSOr Gerlitz iser_conn_terminate(ib_conn); 63865e7ae7bSOr Gerlitz } 63965e7ae7bSOr Gerlitz 6403128c6c7SMike Christie static mode_t iser_attr_is_visible(int param_type, int param) 6413128c6c7SMike Christie { 6423128c6c7SMike Christie switch (param_type) { 643f27fb2efSMike Christie case ISCSI_HOST_PARAM: 644f27fb2efSMike Christie switch (param) { 645f27fb2efSMike Christie case ISCSI_HOST_PARAM_NETDEV_NAME: 646f27fb2efSMike Christie case ISCSI_HOST_PARAM_HWADDRESS: 647f27fb2efSMike Christie case ISCSI_HOST_PARAM_INITIATOR_NAME: 648f27fb2efSMike Christie return S_IRUGO; 649f27fb2efSMike Christie default: 650f27fb2efSMike Christie return 0; 651f27fb2efSMike Christie } 6523128c6c7SMike Christie case ISCSI_PARAM: 6533128c6c7SMike Christie switch (param) { 6543128c6c7SMike Christie case ISCSI_PARAM_MAX_RECV_DLENGTH: 6553128c6c7SMike Christie case ISCSI_PARAM_MAX_XMIT_DLENGTH: 6563128c6c7SMike Christie case ISCSI_PARAM_HDRDGST_EN: 6573128c6c7SMike Christie case ISCSI_PARAM_DATADGST_EN: 6583128c6c7SMike Christie case ISCSI_PARAM_CONN_ADDRESS: 6593128c6c7SMike Christie case ISCSI_PARAM_CONN_PORT: 6603128c6c7SMike Christie case ISCSI_PARAM_EXP_STATSN: 6613128c6c7SMike Christie case ISCSI_PARAM_PERSISTENT_ADDRESS: 6623128c6c7SMike Christie case ISCSI_PARAM_PERSISTENT_PORT: 6633128c6c7SMike Christie case ISCSI_PARAM_PING_TMO: 6643128c6c7SMike Christie case ISCSI_PARAM_RECV_TMO: 6651d063c17SMike Christie case ISCSI_PARAM_INITIAL_R2T_EN: 6661d063c17SMike Christie case ISCSI_PARAM_MAX_R2T: 6671d063c17SMike Christie case ISCSI_PARAM_IMM_DATA_EN: 6681d063c17SMike Christie case ISCSI_PARAM_FIRST_BURST: 6691d063c17SMike Christie case ISCSI_PARAM_MAX_BURST: 6701d063c17SMike Christie case ISCSI_PARAM_PDU_INORDER_EN: 6711d063c17SMike Christie case ISCSI_PARAM_DATASEQ_INORDER_EN: 6721d063c17SMike Christie case ISCSI_PARAM_TARGET_NAME: 6731d063c17SMike Christie case ISCSI_PARAM_TPGT: 6741d063c17SMike Christie case ISCSI_PARAM_USERNAME: 6751d063c17SMike Christie case ISCSI_PARAM_PASSWORD: 6761d063c17SMike Christie case ISCSI_PARAM_USERNAME_IN: 6771d063c17SMike Christie case ISCSI_PARAM_PASSWORD_IN: 6781d063c17SMike Christie case ISCSI_PARAM_FAST_ABORT: 6791d063c17SMike Christie case ISCSI_PARAM_ABORT_TMO: 6801d063c17SMike Christie case ISCSI_PARAM_LU_RESET_TMO: 6811d063c17SMike Christie case ISCSI_PARAM_TGT_RESET_TMO: 6821d063c17SMike Christie case ISCSI_PARAM_IFACE_NAME: 6831d063c17SMike Christie case ISCSI_PARAM_INITIATOR_NAME: 6843128c6c7SMike Christie return S_IRUGO; 6853128c6c7SMike Christie default: 6863128c6c7SMike Christie return 0; 6873128c6c7SMike Christie } 6883128c6c7SMike Christie } 6893128c6c7SMike Christie 6903128c6c7SMike Christie return 0; 6913128c6c7SMike Christie } 6923128c6c7SMike Christie 69365e7ae7bSOr Gerlitz static struct scsi_host_template iscsi_iser_sht = { 6947974392cSMike Christie .module = THIS_MODULE, 69565e7ae7bSOr Gerlitz .name = "iSCSI Initiator over iSER, v." DRV_VER, 69665e7ae7bSOr Gerlitz .queuecommand = iscsi_queuecommand, 6976410627eSErez Zilber .change_queue_depth = iscsi_change_queue_depth, 69865e7ae7bSOr Gerlitz .sg_tablesize = ISCSI_ISER_SG_TABLESIZE, 6998072ec2fSErez Zilber .max_sectors = 1024, 700e28f3d5bSMike Christie .cmd_per_lun = ISER_DEF_CMD_PER_LUN, 70165e7ae7bSOr Gerlitz .eh_abort_handler = iscsi_eh_abort, 70290c18f3cSErez Zilber .eh_device_reset_handler= iscsi_eh_device_reset, 703309ce156SJayamohan Kallickal .eh_target_reset_handler = iscsi_eh_recover_target, 7046b5d6c44SMike Christie .target_alloc = iscsi_target_alloc, 70565e7ae7bSOr Gerlitz .use_clustering = DISABLE_CLUSTERING, 70665e7ae7bSOr Gerlitz .proc_name = "iscsi_iser", 70765e7ae7bSOr Gerlitz .this_id = -1, 70865e7ae7bSOr Gerlitz }; 70965e7ae7bSOr Gerlitz 71065e7ae7bSOr Gerlitz static struct iscsi_transport iscsi_iser_transport = { 71165e7ae7bSOr Gerlitz .owner = THIS_MODULE, 71265e7ae7bSOr Gerlitz .name = "iser", 71365e7ae7bSOr Gerlitz .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T, 71465e7ae7bSOr Gerlitz /* session management */ 71565e7ae7bSOr Gerlitz .create_session = iscsi_iser_session_create, 71675613521SMike Christie .destroy_session = iscsi_iser_session_destroy, 71765e7ae7bSOr Gerlitz /* connection management */ 71865e7ae7bSOr Gerlitz .create_conn = iscsi_iser_conn_create, 71965e7ae7bSOr Gerlitz .bind_conn = iscsi_iser_conn_bind, 72065e7ae7bSOr Gerlitz .destroy_conn = iscsi_iser_conn_destroy, 7213128c6c7SMike Christie .attr_is_visible = iser_attr_is_visible, 722358ff019SMike Christie .set_param = iscsi_iser_set_param, 723358ff019SMike Christie .get_conn_param = iscsi_conn_get_param, 7247c53c6f8SMike Christie .get_ep_param = iscsi_iser_get_ep_param, 725358ff019SMike Christie .get_session_param = iscsi_session_get_param, 72665e7ae7bSOr Gerlitz .start_conn = iscsi_iser_conn_start, 727b40977d9SMike Christie .stop_conn = iscsi_iser_conn_stop, 7280801c242SMike Christie /* iscsi host params */ 7290801c242SMike Christie .get_host_param = iscsi_host_get_param, 7300801c242SMike Christie .set_host_param = iscsi_host_set_param, 73165e7ae7bSOr Gerlitz /* IO */ 73265e7ae7bSOr Gerlitz .send_pdu = iscsi_conn_send_pdu, 73365e7ae7bSOr Gerlitz .get_stats = iscsi_iser_conn_get_stats, 7342747fdb2SMike Christie .init_task = iscsi_iser_task_init, 7352747fdb2SMike Christie .xmit_task = iscsi_iser_task_xmit, 7362747fdb2SMike Christie .cleanup_task = iscsi_iser_cleanup_task, 7370f9c7449SMike Christie .alloc_pdu = iscsi_iser_pdu_alloc, 73865e7ae7bSOr Gerlitz /* recovery */ 73965e7ae7bSOr Gerlitz .session_recovery_timedout = iscsi_session_recovery_timedout, 74065e7ae7bSOr Gerlitz 74165e7ae7bSOr Gerlitz .ep_connect = iscsi_iser_ep_connect, 74265e7ae7bSOr Gerlitz .ep_poll = iscsi_iser_ep_poll, 74365e7ae7bSOr Gerlitz .ep_disconnect = iscsi_iser_ep_disconnect 74465e7ae7bSOr Gerlitz }; 74565e7ae7bSOr Gerlitz 74665e7ae7bSOr Gerlitz static int __init iser_init(void) 74765e7ae7bSOr Gerlitz { 74865e7ae7bSOr Gerlitz int err; 74965e7ae7bSOr Gerlitz 75065e7ae7bSOr Gerlitz iser_dbg("Starting iSER datamover...\n"); 75165e7ae7bSOr Gerlitz 75265e7ae7bSOr Gerlitz if (iscsi_max_lun < 1) { 75365e7ae7bSOr Gerlitz printk(KERN_ERR "Invalid max_lun value of %u\n", iscsi_max_lun); 75465e7ae7bSOr Gerlitz return -EINVAL; 75565e7ae7bSOr Gerlitz } 75665e7ae7bSOr Gerlitz 75765e7ae7bSOr Gerlitz memset(&ig, 0, sizeof(struct iser_global)); 75865e7ae7bSOr Gerlitz 75965e7ae7bSOr Gerlitz ig.desc_cache = kmem_cache_create("iser_descriptors", 760f19624aaSOr Gerlitz sizeof(struct iser_tx_desc), 76165e7ae7bSOr Gerlitz 0, SLAB_HWCACHE_ALIGN, 76220c2df83SPaul Mundt NULL); 76365e7ae7bSOr Gerlitz if (ig.desc_cache == NULL) 76465e7ae7bSOr Gerlitz return -ENOMEM; 76565e7ae7bSOr Gerlitz 76665e7ae7bSOr Gerlitz /* device init is called only after the first addr resolution */ 76765e7ae7bSOr Gerlitz mutex_init(&ig.device_list_mutex); 76865e7ae7bSOr Gerlitz INIT_LIST_HEAD(&ig.device_list); 76965e7ae7bSOr Gerlitz mutex_init(&ig.connlist_mutex); 77065e7ae7bSOr Gerlitz INIT_LIST_HEAD(&ig.connlist); 77165e7ae7bSOr Gerlitz 77275613521SMike Christie iscsi_iser_scsi_transport = iscsi_register_transport( 77375613521SMike Christie &iscsi_iser_transport); 77475613521SMike Christie if (!iscsi_iser_scsi_transport) { 77565e7ae7bSOr Gerlitz iser_err("iscsi_register_transport failed\n"); 77665e7ae7bSOr Gerlitz err = -EINVAL; 77765e7ae7bSOr Gerlitz goto register_transport_failure; 77865e7ae7bSOr Gerlitz } 77965e7ae7bSOr Gerlitz 78065e7ae7bSOr Gerlitz return 0; 78165e7ae7bSOr Gerlitz 78265e7ae7bSOr Gerlitz register_transport_failure: 78365e7ae7bSOr Gerlitz kmem_cache_destroy(ig.desc_cache); 78465e7ae7bSOr Gerlitz 78565e7ae7bSOr Gerlitz return err; 78665e7ae7bSOr Gerlitz } 78765e7ae7bSOr Gerlitz 78865e7ae7bSOr Gerlitz static void __exit iser_exit(void) 78965e7ae7bSOr Gerlitz { 79065e7ae7bSOr Gerlitz iser_dbg("Removing iSER datamover...\n"); 79165e7ae7bSOr Gerlitz iscsi_unregister_transport(&iscsi_iser_transport); 79265e7ae7bSOr Gerlitz kmem_cache_destroy(ig.desc_cache); 79365e7ae7bSOr Gerlitz } 79465e7ae7bSOr Gerlitz 79565e7ae7bSOr Gerlitz module_init(iser_init); 79665e7ae7bSOr Gerlitz module_exit(iser_exit); 797