| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Michael Chan | 7878 | 83.89% | 3 | 5.56% |
| Eddie Wai | 1080 | 11.50% | 23 | 42.59% |
| Michael Christie | 203 | 2.16% | 6 | 11.11% |
| Barak Witkowsky | 59 | 0.63% | 1 | 1.85% |
| Anil Veerabhadrappa | 57 | 0.61% | 3 | 5.56% |
| Kees Cook | 28 | 0.30% | 1 | 1.85% |
| Tej Parkash | 21 | 0.22% | 2 | 3.70% |
| Nilesh Javali | 20 | 0.21% | 1 | 1.85% |
| Christoph Hellwig | 11 | 0.12% | 3 | 5.56% |
| Dan Carpenter | 10 | 0.11% | 2 | 3.70% |
| Maxime Jayat | 7 | 0.07% | 1 | 1.85% |
| Shlomo Pongratz | 4 | 0.04% | 1 | 1.85% |
| Jayamohan Kallickal | 3 | 0.03% | 2 | 3.70% |
| Tejun Heo | 3 | 0.03% | 1 | 1.85% |
| Nicholas Bellinger | 2 | 0.02% | 1 | 1.85% |
| Joe Perches | 2 | 0.02% | 1 | 1.85% |
| Vikas Chaudhary | 2 | 0.02% | 1 | 1.85% |
| Al Viro | 1 | 0.01% | 1 | 1.85% |
| Total | 9391 | 54 |
/* * bnx2i_iscsi.c: QLogic NetXtreme II iSCSI driver. * * Copyright (c) 2006 - 2013 Broadcom Corporation * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. * Copyright (c) 2007, 2008 Mike Christie * Copyright (c) 2014, QLogic Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation. * * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com) * Maintained by: QLogic-Storage-Upstream@qlogic.com */ #include <linux/slab.h> #include <scsi/scsi_tcq.h> #include <scsi/libiscsi.h> #include "bnx2i.h" struct scsi_transport_template *bnx2i_scsi_xport_template; struct iscsi_transport bnx2i_iscsi_transport; static struct scsi_host_template bnx2i_host_template; /* * Global endpoint resource info */ static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */ DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); static int bnx2i_adapter_ready(struct bnx2i_hba *hba) { int retval = 0; if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) || test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state)) retval = -EPERM; return retval; } /** * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks * @cmd: iscsi cmd struct pointer * @buf_off: absolute buffer offset * @start_bd_off: u32 pointer to return the offset within the BD * indicated by 'start_bd_idx' on which 'buf_off' falls * @start_bd_idx: index of the BD on which 'buf_off' falls * * identifies & marks various bd info for scsi command's imm data, * unsolicited data and the first solicited data seq. */ static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off, u32 *start_bd_off, u32 *start_bd_idx) { struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl; u32 cur_offset = 0; u32 cur_bd_idx = 0; if (buf_off) { while (buf_off >= (cur_offset + bd_tbl->buffer_length)) { cur_offset += bd_tbl->buffer_length; cur_bd_idx++; bd_tbl++; } } *start_bd_off = buf_off - cur_offset; *start_bd_idx = cur_bd_idx; } /** * bnx2i_setup_write_cmd_bd_info - sets up BD various information * @task: transport layer's cmd struct pointer * * identifies & marks various bd info for scsi command's immediate data, * unsolicited data and first solicited data seq which includes BD start * index & BD buf off. his function takes into account iscsi parameter such * as immediate data and unsolicited data is support on this connection. */ static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task) { struct bnx2i_cmd *cmd = task->dd_data; u32 start_bd_offset; u32 start_bd_idx; u32 buffer_offset = 0; u32 cmd_len = cmd->req.total_data_transfer_length; /* if ImmediateData is turned off & IntialR2T is turned on, * there will be no immediate or unsolicited data, just return. */ if (!iscsi_task_has_unsol_data(task) && !task->imm_count) return; /* Immediate data */ buffer_offset += task->imm_count; if (task->imm_count == cmd_len) return; if (iscsi_task_has_unsol_data(task)) { bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, &start_bd_offset, &start_bd_idx); cmd->req.ud_buffer_offset = start_bd_offset; cmd->req.ud_start_bd_index = start_bd_idx; buffer_offset += task->unsol_r2t.data_length; } if (buffer_offset != cmd_len) { bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, &start_bd_offset, &start_bd_idx); if ((start_bd_offset > task->conn->session->first_burst) || (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) { int i = 0; iscsi_conn_printk(KERN_ALERT, task->conn, "bnx2i- error, buf offset 0x%x " "bd_valid %d use_sg %d\n", buffer_offset, cmd->io_tbl.bd_valid, scsi_sg_count(cmd->scsi_cmd)); for (i = 0; i < cmd->io_tbl.bd_valid; i++) iscsi_conn_printk(KERN_ALERT, task->conn, "bnx2i err, bd[%d]: len %x\n", i, cmd->io_tbl.bd_tbl[i].\ buffer_length); } cmd->req.sd_buffer_offset = start_bd_offset; cmd->req.sd_start_bd_index = start_bd_idx; } } /** * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table * @hba: adapter instance * @cmd: iscsi cmd struct pointer * * map SG list */ static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) { struct scsi_cmnd *sc = cmd->scsi_cmd; struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; struct scatterlist *sg; int byte_count = 0; int bd_count = 0; int sg_count; int sg_len; u64 addr; int i; BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD); sg_count = scsi_dma_map(sc); scsi_for_each_sg(sc, sg, sg_count, i) { sg_len = sg_dma_len(sg); addr = (u64) sg_dma_address(sg); bd[bd_count].buffer_addr_lo = addr & 0xffffffff; bd[bd_count].buffer_addr_hi = addr >> 32; bd[bd_count].buffer_length = sg_len; bd[bd_count].flags = 0; if (bd_count == 0) bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN; byte_count += sg_len; bd_count++; } if (bd_count) bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN; BUG_ON(byte_count != scsi_bufflen(sc)); return bd_count; } /** * bnx2i_iscsi_map_sg_list - maps SG list * @cmd: iscsi cmd struct pointer * * creates BD list table for the command */ static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd) { int bd_count; bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd); if (!bd_count) { struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0; bd[0].buffer_length = bd[0].flags = 0; } cmd->io_tbl.bd_valid = bd_count; } /** * bnx2i_iscsi_unmap_sg_list - unmaps SG list * @cmd: iscsi cmd struct pointer * * unmap IO buffers and invalidate the BD table */ void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd) { struct scsi_cmnd *sc = cmd->scsi_cmd; if (cmd->io_tbl.bd_valid && sc) { scsi_dma_unmap(sc); cmd->io_tbl.bd_valid = 0; } } static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd) { memset(&cmd->req, 0x00, sizeof(cmd->req)); cmd->req.op_code = 0xFF; cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma; cmd->req.bd_list_addr_hi = (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32); } /** * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid' * @hba: pointer to adapter instance * @conn: pointer to iscsi connection * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) * * update iscsi cid table entry with connection pointer. This enables * driver to quickly get hold of connection structure pointer in * completion/interrupt thread using iscsi context ID */ static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba, struct bnx2i_conn *bnx2i_conn, u32 iscsi_cid) { if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) { iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, "conn bind - entry #%d not free\n", iscsi_cid); return -EBUSY; } hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn; return 0; } /** * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr * @hba: pointer to adapter instance * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) */ struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, u16 iscsi_cid) { if (!hba->cid_que.conn_cid_tbl) { printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n"); return NULL; } else if (iscsi_cid >= hba->max_active_conns) { printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid); return NULL; } return hba->cid_que.conn_cid_tbl[iscsi_cid]; } /** * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool * @hba: pointer to adapter instance */ static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba) { int idx; if (!hba->cid_que.cid_free_cnt) return -1; idx = hba->cid_que.cid_q_cons_idx; hba->cid_que.cid_q_cons_idx++; if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx) hba->cid_que.cid_q_cons_idx = 0; hba->cid_que.cid_free_cnt--; return hba->cid_que.cid_que[idx]; } /** * bnx2i_free_iscsi_cid - returns tcp port to free list * @hba: pointer to adapter instance * @iscsi_cid: iscsi context ID to free */ static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid) { int idx; if (iscsi_cid == (u16) -1) return; hba->cid_que.cid_free_cnt++; idx = hba->cid_que.cid_q_prod_idx; hba->cid_que.cid_que[idx] = iscsi_cid; hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL; hba->cid_que.cid_q_prod_idx++; if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx) hba->cid_que.cid_q_prod_idx = 0; } /** * bnx2i_setup_free_cid_que - sets up free iscsi cid queue * @hba: pointer to adapter instance * * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table, * and initialize table attributes */ static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba) { int mem_size; int i; mem_size = hba->max_active_conns * sizeof(u32); mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL); if (!hba->cid_que.cid_que_base) return -ENOMEM; mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *); mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL); if (!hba->cid_que.conn_cid_tbl) { kfree(hba->cid_que.cid_que_base); hba->cid_que.cid_que_base = NULL; return -ENOMEM; } hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base; hba->cid_que.cid_q_prod_idx = 0; hba->cid_que.cid_q_cons_idx = 0; hba->cid_que.cid_q_max_idx = hba->max_active_conns; hba->cid_que.cid_free_cnt = hba->max_active_conns; for (i = 0; i < hba->max_active_conns; i++) { hba->cid_que.cid_que[i] = i; hba->cid_que.conn_cid_tbl[i] = NULL; } return 0; } /** * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources * @hba: pointer to adapter instance */ static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba) { kfree(hba->cid_que.cid_que_base); hba->cid_que.cid_que_base = NULL; kfree(hba->cid_que.conn_cid_tbl); hba->cid_que.conn_cid_tbl = NULL; } /** * bnx2i_alloc_ep - allocates ep structure from global pool * @hba: pointer to adapter instance * * routine allocates a free endpoint structure from global pool and * a tcp port to be used for this connection. Global resource lock, * 'bnx2i_resc_lock' is held while accessing shared global data structures */ static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba) { struct iscsi_endpoint *ep; struct bnx2i_endpoint *bnx2i_ep; u32 ec_div; ep = iscsi_create_endpoint(sizeof(*bnx2i_ep)); if (!ep) { printk(KERN_ERR "bnx2i: Could not allocate ep\n"); return NULL; } bnx2i_ep = ep->dd_data; bnx2i_ep->cls_ep = ep; INIT_LIST_HEAD(&bnx2i_ep->link); bnx2i_ep->state = EP_STATE_IDLE; bnx2i_ep->ep_iscsi_cid = (u16) -1; bnx2i_ep->hba = hba; bnx2i_ep->hba_age = hba->age; ec_div = event_coal_div; while (ec_div >>= 1) bnx2i_ep->ec_shift += 1; hba->ofld_conns_active++; init_waitqueue_head(&bnx2i_ep->ofld_wait); return ep; } /** * bnx2i_free_ep - free endpoint * @ep: pointer to iscsi endpoint structure */ static void bnx2i_free_ep(struct iscsi_endpoint *ep) { struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; unsigned long flags; spin_lock_irqsave(&bnx2i_resc_lock, flags); bnx2i_ep->state = EP_STATE_IDLE; bnx2i_ep->hba->ofld_conns_active--; if (bnx2i_ep->ep_iscsi_cid != (u16) -1) bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid); if (bnx2i_ep->conn) { bnx2i_ep->conn->ep = NULL; bnx2i_ep->conn = NULL; } bnx2i_ep->hba = NULL; spin_unlock_irqrestore(&bnx2i_resc_lock, flags); iscsi_destroy_endpoint(ep); } /** * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command * @hba: adapter instance pointer * @session: iscsi session pointer * @cmd: iscsi command structure */ static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session, struct bnx2i_cmd *cmd) { struct io_bdt *io = &cmd->io_tbl; struct iscsi_bd *bd; io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, ISCSI_MAX_BDS_PER_CMD * sizeof(*bd), &io->bd_tbl_dma, GFP_KERNEL); if (!io->bd_tbl) { iscsi_session_printk(KERN_ERR, session, "Could not " "allocate bdt.\n"); return -ENOMEM; } io->bd_valid = 0; return 0; } /** * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table * @hba: adapter instance pointer * @session: iscsi session pointer * @cmd: iscsi command structure */ static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba, struct iscsi_session *session) { int i; for (i = 0; i < session->cmds_max; i++) { struct iscsi_task *task = session->cmds[i]; struct bnx2i_cmd *cmd = task->dd_data; if (cmd->io_tbl.bd_tbl) dma_free_coherent(&hba->pcidev->dev, ISCSI_MAX_BDS_PER_CMD * sizeof(struct iscsi_bd), cmd->io_tbl.bd_tbl, cmd->io_tbl.bd_tbl_dma); } } /** * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session * @hba: adapter instance pointer * @session: iscsi session pointer */ static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba, struct iscsi_session *session) { int i; for (i = 0; i < session->cmds_max; i++) { struct iscsi_task *task = session->cmds[i]; struct bnx2i_cmd *cmd = task->dd_data; task->hdr = &cmd->hdr; task->hdr_max = sizeof(struct iscsi_hdr); if (bnx2i_alloc_bdt(hba, session, cmd)) goto free_bdts; } return 0; free_bdts: bnx2i_destroy_cmd_pool(hba, session); return -ENOMEM; } /** * bnx2i_setup_mp_bdt - allocate BD table resources * @hba: pointer to adapter structure * * Allocate memory for dummy buffer and associated BD * table to be used by middle path (MP) requests */ static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba) { int rc = 0; struct iscsi_bd *mp_bdt; u64 addr; hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, &hba->mp_bd_dma, GFP_KERNEL); if (!hba->mp_bd_tbl) { printk(KERN_ERR "unable to allocate Middle Path BDT\n"); rc = -1; goto out; } hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, &hba->dummy_buf_dma, GFP_KERNEL); if (!hba->dummy_buffer) { printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n"); dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, hba->mp_bd_tbl, hba->mp_bd_dma); hba->mp_bd_tbl = NULL; rc = -1; goto out; } mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl; addr = (unsigned long) hba->dummy_buf_dma; mp_bdt->buffer_addr_lo = addr & 0xffffffff; mp_bdt->buffer_addr_hi = addr >> 32; mp_bdt->buffer_length = CNIC_PAGE_SIZE; mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN | ISCSI_BD_FIRST_IN_BD_CHAIN; out: return rc; } /** * bnx2i_free_mp_bdt - releases ITT back to free pool * @hba: pointer to adapter instance * * free MP dummy buffer and associated BD table */ static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba) { if (hba->mp_bd_tbl) { dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, hba->mp_bd_tbl, hba->mp_bd_dma); hba->mp_bd_tbl = NULL; } if (hba->dummy_buffer) { dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, hba->dummy_buffer, hba->dummy_buf_dma); hba->dummy_buffer = NULL; } return; } /** * bnx2i_drop_session - notifies iscsid of connection error. * @hba: adapter instance pointer * @session: iscsi session pointer * * This notifies iscsid that there is a error, so it can initiate * recovery. * * This relies on caller using the iscsi class iterator so the object * is refcounted and does not disapper from under us. */ void bnx2i_drop_session(struct iscsi_cls_session *cls_session) { iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED); } /** * bnx2i_ep_destroy_list_add - add an entry to EP destroy list * @hba: pointer to adapter instance * @ep: pointer to endpoint (transport identifier) structure * * EP destroy queue manager */ static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) { write_lock_bh(&hba->ep_rdwr_lock); list_add_tail(&ep->link, &hba->ep_destroy_list); write_unlock_bh(&hba->ep_rdwr_lock); return 0; } /** * bnx2i_ep_destroy_list_del - add an entry to EP destroy list * * @hba: pointer to adapter instance * @ep: pointer to endpoint (transport identifier) structure * * EP destroy queue manager */ static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) { write_lock_bh(&hba->ep_rdwr_lock); list_del_init(&ep->link); write_unlock_bh(&hba->ep_rdwr_lock); return 0; } /** * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list * @hba: pointer to adapter instance * @ep: pointer to endpoint (transport identifier) structure * * pending conn offload completion queue manager */ static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) { write_lock_bh(&hba->ep_rdwr_lock); list_add_tail(&ep->link, &hba->ep_ofld_list); write_unlock_bh(&hba->ep_rdwr_lock); return 0; } /** * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list * @hba: pointer to adapter instance * @ep: pointer to endpoint (transport identifier) structure * * pending conn offload completion queue manager */ static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) { write_lock_bh(&hba->ep_rdwr_lock); list_del_init(&ep->link); write_unlock_bh(&hba->ep_rdwr_lock); return 0; } /** * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints * * @hba: pointer to adapter instance * @iscsi_cid: iscsi context ID to find * */ struct bnx2i_endpoint * bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid) { struct list_head *list; struct list_head *tmp; struct bnx2i_endpoint *ep = NULL; read_lock_bh(&hba->ep_rdwr_lock); list_for_each_safe(list, tmp, &hba->ep_ofld_list) { ep = (struct bnx2i_endpoint *)list; if (ep->ep_iscsi_cid == iscsi_cid) break; ep = NULL; } read_unlock_bh(&hba->ep_rdwr_lock); if (!ep) printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); return ep; } /** * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list * @hba: pointer to adapter instance * @iscsi_cid: iscsi context ID to find * */ struct bnx2i_endpoint * bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid) { struct list_head *list; struct list_head *tmp; struct bnx2i_endpoint *ep = NULL; read_lock_bh(&hba->ep_rdwr_lock); list_for_each_safe(list, tmp, &hba->ep_destroy_list) { ep = (struct bnx2i_endpoint *)list; if (ep->ep_iscsi_cid == iscsi_cid) break; ep = NULL; } read_unlock_bh(&hba->ep_rdwr_lock); if (!ep) printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); return ep; } /** * bnx2i_ep_active_list_add - add an entry to ep active list * @hba: pointer to adapter instance * @ep: pointer to endpoint (transport identifier) structure * * current active conn queue manager */ static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) { write_lock_bh(&hba->ep_rdwr_lock); list_add_tail(&ep->link, &hba->ep_active_list); write_unlock_bh(&hba->ep_rdwr_lock); } /** * bnx2i_ep_active_list_del - deletes an entry to ep active list * @hba: pointer to adapter instance * @ep: pointer to endpoint (transport identifier) structure * * current active conn queue manager */ static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) { write_lock_bh(&hba->ep_rdwr_lock); list_del_init(&ep->link); write_unlock_bh(&hba->ep_rdwr_lock); } /** * bnx2i_setup_host_queue_size - assigns shost->can_queue param * @hba: pointer to adapter instance * @shost: scsi host pointer * * Initializes 'can_queue' parameter based on how many outstanding commands * the device can handle. Each device 5708/5709/57710 has different * capabilities */ static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba, struct Scsi_Host *shost) { if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type)) shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709; else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710; else shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; } /** * bnx2i_alloc_hba - allocate and init adapter instance * @cnic: cnic device pointer * * allocate & initialize adapter structure and call other * support routines to do per adapter initialization */ struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic) { struct Scsi_Host *shost; struct bnx2i_hba *hba; shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0); if (!shost) return NULL; shost->dma_boundary = cnic->pcidev->dma_mask; shost->transportt = bnx2i_scsi_xport_template; shost->max_id = ISCSI_MAX_CONNS_PER_HBA; shost->max_channel = 0; shost->max_lun = 512; shost->max_cmd_len = 16; hba = iscsi_host_priv(shost); hba->shost = shost; hba->netdev = cnic->netdev; /* Get PCI related information and update hba struct members */ hba->pcidev = cnic->pcidev; pci_dev_get(hba->pcidev); hba->pci_did = hba->pcidev->device; hba->pci_vid = hba->pcidev->vendor; hba->pci_sdid = hba->pcidev->subsystem_device; hba->pci_svid = hba->pcidev->subsystem_vendor; hba->pci_func = PCI_FUNC(hba->pcidev->devfn); hba->pci_devno = PCI_SLOT(hba->pcidev->devfn); bnx2i_identify_device(hba, cnic); bnx2i_setup_host_queue_size(hba, shost); hba->reg_base = pci_resource_start(hba->pcidev, 0); if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { hba->regview = pci_iomap(hba->pcidev, 0, BNX2_MQ_CONFIG2); if (!hba->regview) goto ioreg_map_err; } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { hba->regview = pci_iomap(hba->pcidev, 0, 4096); if (!hba->regview) goto ioreg_map_err; } if (bnx2i_setup_mp_bdt(hba)) goto mp_bdt_mem_err; INIT_LIST_HEAD(&hba->ep_ofld_list); INIT_LIST_HEAD(&hba->ep_active_list); INIT_LIST_HEAD(&hba->ep_destroy_list); rwlock_init(&hba->ep_rdwr_lock); hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED; /* different values for 5708/5709/57710 */ hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA; if (bnx2i_setup_free_cid_que(hba)) goto cid_que_err; /* SQ/RQ/CQ size can be changed via sysfx interface */ if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX) hba->max_sqes = sq_size; else hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT; } else { /* 5706/5708/5709 */ if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX) hba->max_sqes = sq_size; else hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT; } hba->max_rqes = rq_size; hba->max_cqes = hba->max_sqes + rq_size; if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX) hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX; } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX) hba->max_cqes = BNX2I_570X_CQ_WQES_MAX; hba->num_ccell = hba->max_sqes / 2; spin_lock_init(&hba->lock); mutex_init(&hba->net_dev_lock); init_waitqueue_head(&hba->eh_wait); if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { hba->hba_shutdown_tmo = 30 * HZ; hba->conn_teardown_tmo = 20 * HZ; hba->conn_ctx_destroy_tmo = 6 * HZ; } else { /* 5706/5708/5709 */ hba->hba_shutdown_tmo = 20 * HZ; hba->conn_teardown_tmo = 10 * HZ; hba->conn_ctx_destroy_tmo = 2 * HZ; } #ifdef CONFIG_32BIT spin_lock_init(&hba->stat_lock); #endif memset(&hba->stats, 0, sizeof(struct iscsi_stats_info)); if (iscsi_host_add(shost, &hba->pcidev->dev)) goto free_dump_mem; return hba; free_dump_mem: bnx2i_release_free_cid_que(hba); cid_que_err: bnx2i_free_mp_bdt(hba); mp_bdt_mem_err: if (hba->regview) { pci_iounmap(hba->pcidev, hba->regview); hba->regview = NULL; } ioreg_map_err: pci_dev_put(hba->pcidev); scsi_host_put(shost); return NULL; } /** * bnx2i_free_hba- releases hba structure and resources held by the adapter * @hba: pointer to adapter instance * * free adapter structure and call various cleanup routines. */ void bnx2i_free_hba(struct bnx2i_hba *hba) { struct Scsi_Host *shost = hba->shost; iscsi_host_remove(shost); INIT_LIST_HEAD(&hba->ep_ofld_list); INIT_LIST_HEAD(&hba->ep_active_list); INIT_LIST_HEAD(&hba->ep_destroy_list); pci_dev_put(hba->pcidev); if (hba->regview) { pci_iounmap(hba->pcidev, hba->regview); hba->regview = NULL; } bnx2i_free_mp_bdt(hba); bnx2i_release_free_cid_que(hba); iscsi_host_free(shost); } /** * bnx2i_conn_free_login_resources - free DMA resources used for login process * @hba: pointer to adapter instance * @bnx2i_conn: iscsi connection pointer * * Login related resources, mostly BDT & payload DMA memory is freed */ static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba, struct bnx2i_conn *bnx2i_conn) { if (bnx2i_conn->gen_pdu.resp_bd_tbl) { dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, bnx2i_conn->gen_pdu.resp_bd_tbl, bnx2i_conn->gen_pdu.resp_bd_dma); bnx2i_conn->gen_pdu.resp_bd_tbl = NULL; } if (bnx2i_conn->gen_pdu.req_bd_tbl) { dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, bnx2i_conn->gen_pdu.req_bd_tbl, bnx2i_conn->gen_pdu.req_bd_dma); bnx2i_conn->gen_pdu.req_bd_tbl = NULL; } if (bnx2i_conn->gen_pdu.resp_buf) { dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, bnx2i_conn->gen_pdu.resp_buf, bnx2i_conn->gen_pdu.resp_dma_addr); bnx2i_conn->gen_pdu.resp_buf = NULL; } if (bnx2i_conn->gen_pdu.req_buf) { dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, bnx2i_conn->gen_pdu.req_buf, bnx2i_conn->gen_pdu.req_dma_addr); bnx2i_conn->gen_pdu.req_buf = NULL; } } /** * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop. * @hba: pointer to adapter instance * @bnx2i_conn: iscsi connection pointer * * Mgmt task DNA resources are allocated in this routine. */ static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba, struct bnx2i_conn *bnx2i_conn) { /* Allocate memory for login request/response buffers */ bnx2i_conn->gen_pdu.req_buf = dma_alloc_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, &bnx2i_conn->gen_pdu.req_dma_addr, GFP_KERNEL); if (bnx2i_conn->gen_pdu.req_buf == NULL) goto login_req_buf_failure; bnx2i_conn->gen_pdu.req_buf_size = 0; bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf; bnx2i_conn->gen_pdu.resp_buf = dma_alloc_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, &bnx2i_conn->gen_pdu.resp_dma_addr, GFP_KERNEL); if (bnx2i_conn->gen_pdu.resp_buf == NULL) goto login_resp_buf_failure; bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf; bnx2i_conn->gen_pdu.req_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL); if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL) goto login_req_bd_tbl_failure; bnx2i_conn->gen_pdu.resp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, &bnx2i_conn->gen_pdu.resp_bd_dma, GFP_KERNEL); if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL) goto login_resp_bd_tbl_failure; return 0; login_resp_bd_tbl_failure: dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, bnx2i_conn->gen_pdu.req_bd_tbl, bnx2i_conn->gen_pdu.req_bd_dma); bnx2i_conn->gen_pdu.req_bd_tbl = NULL; login_req_bd_tbl_failure: dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, bnx2i_conn->gen_pdu.resp_buf, bnx2i_conn->gen_pdu.resp_dma_addr); bnx2i_conn->gen_pdu.resp_buf = NULL; login_resp_buf_failure: dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, bnx2i_conn->gen_pdu.req_buf, bnx2i_conn->gen_pdu.req_dma_addr); bnx2i_conn->gen_pdu.req_buf = NULL; login_req_buf_failure: iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data, "login resource alloc failed!!\n"); return -ENOMEM; } /** * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table. * @bnx2i_conn: iscsi connection pointer * * Allocates buffers and BD tables before shipping requests to cnic * for PDUs prepared by 'iscsid' daemon */ static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn) { struct iscsi_bd *bd_tbl; bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl; bd_tbl->buffer_addr_hi = (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32); bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr; bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr - bnx2i_conn->gen_pdu.req_buf; bd_tbl->reserved0 = 0; bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | ISCSI_BD_FIRST_IN_BD_CHAIN; bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl; bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32; bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr; bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN; bd_tbl->reserved0 = 0; bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | ISCSI_BD_FIRST_IN_BD_CHAIN; } /** * bnx2i_iscsi_send_generic_request - called to send mgmt tasks. * @task: transport layer task pointer * * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login, * Nop-out and Logout requests flow through this path. */ static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task) { struct bnx2i_cmd *cmd = task->dd_data; struct bnx2i_conn *bnx2i_conn = cmd->conn; int rc = 0; char *buf; int data_len; bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn); switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { case ISCSI_OP_LOGIN: bnx2i_send_iscsi_login(bnx2i_conn, task); break; case ISCSI_OP_NOOP_OUT: data_len = bnx2i_conn->gen_pdu.req_buf_size; buf = bnx2i_conn->gen_pdu.req_buf; if (data_len) rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, buf, data_len, 1); else rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, NULL, 0, 1); break; case ISCSI_OP_LOGOUT: rc = bnx2i_send_iscsi_logout(bnx2i_conn, task); break; case ISCSI_OP_SCSI_TMFUNC: rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task); break; case ISCSI_OP_TEXT: rc = bnx2i_send_iscsi_text(bnx2i_conn, task); break; default: iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, "send_gen: unsupported op 0x%x\n", task->hdr->opcode); } return rc; } /********************************************************************** * SCSI-ML Interface **********************************************************************/ /** * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe * @sc: SCSI-ML command pointer * @cmd: iscsi cmd pointer */ static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd) { u32 dword; int lpcnt; u8 *srcp; u32 *dstp; u32 scsi_lun[2]; int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun); cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]); cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]); lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword); srcp = (u8 *) sc->cmnd; dstp = (u32 *) cmd->req.cdb; while (lpcnt--) { memcpy(&dword, (const void *) srcp, 4); *dstp = cpu_to_be32(dword); srcp += 4; dstp++; } if (sc->cmd_len & 0x3) { dword = (u32) srcp[0] | ((u32) srcp[1] << 8); *dstp = cpu_to_be32(dword); } } static void bnx2i_cleanup_task(struct iscsi_task *task) { struct iscsi_conn *conn = task->conn; struct bnx2i_conn *bnx2i_conn = conn->dd_data; struct bnx2i_hba *hba = bnx2i_conn->hba; /* * mgmt task or cmd was never sent to us to transmit. */ if (!task->sc || task->state == ISCSI_TASK_PENDING) return; /* * need to clean-up task context to claim dma buffers */ if (task->state == ISCSI_TASK_ABRT_TMF) { bnx2i_send_cmd_cleanup_req(hba, task->dd_data); spin_unlock_bh(&conn->session->back_lock); spin_unlock_bh(&conn->session->frwd_lock); wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl, msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT)); spin_lock_bh(&conn->session->frwd_lock); spin_lock_bh(&conn->session->back_lock); } bnx2i_iscsi_unmap_sg_list(task->dd_data); } /** * bnx2i_mtask_xmit - transmit mtask to chip for further processing * @conn: transport layer conn structure pointer * @task: transport layer command structure pointer */ static int bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) { struct bnx2i_conn *bnx2i_conn = conn->dd_data; struct bnx2i_hba *hba = bnx2i_conn->hba; struct bnx2i_cmd *cmd = task->dd_data; memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); bnx2i_setup_cmd_wqe_template(cmd); bnx2i_conn->gen_pdu.req_buf_size = task->data_count; /* Tx PDU/data length count */ ADD_STATS_64(hba, tx_pdus, 1); ADD_STATS_64(hba, tx_bytes, task->data_count); if (task->data_count) { memcpy(bnx2i_conn->gen_pdu.req_buf, task->data, task->data_count); bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf + task->data_count; } cmd->conn = conn->dd_data; cmd->scsi_cmd = NULL; return bnx2i_iscsi_send_generic_request(task); } /** * bnx2i_task_xmit - transmit iscsi command to chip for further processing * @task: transport layer command structure pointer * * maps SG buffers and send request to chip/firmware in the form of SQ WQE */ static int bnx2i_task_xmit(struct iscsi_task *task) { struct iscsi_conn *conn = task->conn; struct iscsi_session *session = conn->session; struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); struct bnx2i_hba *hba = iscsi_host_priv(shost); struct bnx2i_conn *bnx2i_conn = conn->dd_data; struct scsi_cmnd *sc = task->sc; struct bnx2i_cmd *cmd = task->dd_data; struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr; if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1 > hba->max_sqes) return -ENOMEM; /* * If there is no scsi_cmnd this must be a mgmt task */ if (!sc) return bnx2i_mtask_xmit(conn, task); bnx2i_setup_cmd_wqe_template(cmd); cmd->req.op_code = ISCSI_OP_SCSI_CMD; cmd->conn = bnx2i_conn; cmd->scsi_cmd = sc; cmd->req.total_data_transfer_length = scsi_bufflen(sc); cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn); bnx2i_iscsi_map_sg_list(cmd); bnx2i_cpy_scsi_cdb(sc, cmd); cmd->req.op_attr = ISCSI_ATTR_SIMPLE; if (sc->sc_data_direction == DMA_TO_DEVICE) { cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE; cmd->req.itt = task->itt | (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT); bnx2i_setup_write_cmd_bd_info(task); } else { if (scsi_bufflen(sc)) cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ; cmd->req.itt = task->itt | (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT); } cmd->req.num_bds = cmd->io_tbl.bd_valid; if (!cmd->io_tbl.bd_valid) { cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma; cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32); cmd->req.num_bds = 1; } bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd); return 0; } /** * bnx2i_session_create - create a new iscsi session * @cmds_max: max commands supported * @qdepth: scsi queue depth to support * @initial_cmdsn: initial iscsi CMDSN to be used for this session * * Creates a new iSCSI session instance on given device. */ static struct iscsi_cls_session * bnx2i_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max, uint16_t qdepth, uint32_t initial_cmdsn) { struct Scsi_Host *shost; struct iscsi_cls_session *cls_session; struct bnx2i_hba *hba; struct bnx2i_endpoint *bnx2i_ep; if (!ep) { printk(KERN_ERR "bnx2i: missing ep.\n"); return NULL; } bnx2i_ep = ep->dd_data; shost = bnx2i_ep->hba->shost; hba = iscsi_host_priv(shost); if (bnx2i_adapter_ready(hba)) return NULL; /* * user can override hw limit as long as it is within * the min/max. */ if (cmds_max > hba->max_sqes) cmds_max = hba->max_sqes; else if (cmds_max < BNX2I_SQ_WQES_MIN) cmds_max = BNX2I_SQ_WQES_MIN; cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost, cmds_max, 0, sizeof(struct bnx2i_cmd), initial_cmdsn, ISCSI_MAX_TARGET); if (!cls_session) return NULL; if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data)) goto session_teardown; return cls_session; session_teardown: iscsi_session_teardown(cls_session); return NULL; } /** * bnx2i_session_destroy - destroys iscsi session * @cls_session: pointer to iscsi cls session * * Destroys previously created iSCSI session instance and releases * all resources held by it */ static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session) { struct iscsi_session *session = cls_session->dd_data; struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); struct bnx2i_hba *hba = iscsi_host_priv(shost); bnx2i_destroy_cmd_pool(hba, session); iscsi_session_teardown(cls_session); } /** * bnx2i_conn_create - create iscsi connection instance * @cls_session: pointer to iscsi cls session * @cid: iscsi cid as per rfc (not NX2's CID terminology) * * Creates a new iSCSI connection instance for a given session */ static struct iscsi_cls_conn * bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) { struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); struct bnx2i_hba *hba = iscsi_host_priv(shost); struct bnx2i_conn *bnx2i_conn; struct iscsi_cls_conn *cls_conn; struct iscsi_conn *conn; cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn), cid); if (!cls_conn) return NULL; conn = cls_conn->dd_data; bnx2i_conn = conn->dd_data; bnx2i_conn->cls_conn = cls_conn; bnx2i_conn->hba = hba; atomic_set(&bnx2i_conn->work_cnt, 0); /* 'ep' ptr will be assigned in bind() call */ bnx2i_conn->ep = NULL; init_completion(&bnx2i_conn->cmd_cleanup_cmpl); if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) { iscsi_conn_printk(KERN_ALERT, conn, "conn_new: login resc alloc failed!!\n"); goto free_conn; } return cls_conn; free_conn: iscsi_conn_teardown(cls_conn); return NULL; } /** * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together * @cls_session: pointer to iscsi cls session * @cls_conn: pointer to iscsi cls conn * @transport_fd: 64-bit EP handle * @is_leading: leading connection on this session? * * Binds together iSCSI session instance, iSCSI connection instance * and the TCP connection. This routine returns error code if * TCP connection does not belong on the device iSCSI sess/conn * is bound */ static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session, struct iscsi_cls_conn *cls_conn, uint64_t transport_fd, int is_leading) { struct iscsi_conn *conn = cls_conn->dd_data; struct bnx2i_conn *bnx2i_conn = conn->dd_data; struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); struct bnx2i_hba *hba = iscsi_host_priv(shost); struct bnx2i_endpoint *bnx2i_ep; struct iscsi_endpoint *ep; int ret_code; ep = iscsi_lookup_endpoint(transport_fd); if (!ep) return -EINVAL; /* * Forcefully terminate all in progress connection recovery at the * earliest, either in bind(), send_pdu(LOGIN), or conn_start() */ if (bnx2i_adapter_ready(hba)) return -EIO; bnx2i_ep = ep->dd_data; if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) || (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD)) /* Peer disconnect via' FIN or RST */ return -EINVAL; if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) return -EINVAL; if (bnx2i_ep->hba != hba) { /* Error - TCP connection does not belong to this device */ iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, "conn bind, ep=0x%p (%s) does not", bnx2i_ep, bnx2i_ep->hba->netdev->name); iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, "belong to hba (%s)\n", hba->netdev->name); return -EEXIST; } bnx2i_ep->conn = bnx2i_conn; bnx2i_conn->ep = bnx2i_ep; bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid; bnx2i_conn->fw_cid = bnx2i_ep->ep_cid; ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn, bnx2i_ep->ep_iscsi_cid); /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710 * driver needs to explicitly replenish RQ index during setup. */ if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) bnx2i_put_rq_buf(bnx2i_conn, 0); bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE); return ret_code; } /** * bnx2i_conn_destroy - destroy iscsi connection instance & release resources * @cls_conn: pointer to iscsi cls conn * * Destroy an iSCSI connection instance and release memory resources held by * this connection */ static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn) { struct iscsi_conn *conn = cls_conn->dd_data; struct bnx2i_conn *bnx2i_conn = conn->dd_data; struct Scsi_Host *shost; struct bnx2i_hba *hba; struct bnx2i_work *work, *tmp; unsigned cpu = 0; struct bnx2i_percpu_s *p; shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); hba = iscsi_host_priv(shost); bnx2i_conn_free_login_resources(hba, bnx2i_conn); if (atomic_read(&bnx2i_conn->work_cnt)) { for_each_online_cpu(cpu) { p = &per_cpu(bnx2i_percpu, cpu); spin_lock_bh(&p->p_work_lock); list_for_each_entry_safe(work, tmp, &p->work_list, list) { if (work->session == conn->session && work->bnx2i_conn == bnx2i_conn) { list_del_init(&work->list); kfree(work); if (!atomic_dec_and_test( &bnx2i_conn->work_cnt)) break; } } spin_unlock_bh(&p->p_work_lock); } } iscsi_conn_teardown(cls_conn); } /** * bnx2i_ep_get_param - return iscsi ep parameter to caller * @ep: pointer to iscsi endpoint * @param: parameter type identifier * @buf: buffer pointer * * returns iSCSI ep parameters */ static int bnx2i_ep_get_param(struct iscsi_endpoint *ep, enum iscsi_param param, char *buf) { struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; struct bnx2i_hba *hba = bnx2i_ep->hba; int len = -ENOTCONN; if (!hba) return -ENOTCONN; switch (param) { case ISCSI_PARAM_CONN_PORT: mutex_lock(&hba->net_dev_lock); if (bnx2i_ep->cm_sk) len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port); mutex_unlock(&hba->net_dev_lock); break; case ISCSI_PARAM_CONN_ADDRESS: mutex_lock(&hba->net_dev_lock); if (bnx2i_ep->cm_sk) len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip); mutex_unlock(&hba->net_dev_lock); break; default: return -ENOSYS; } return len; } /** * bnx2i_host_get_param - returns host (adapter) related parameters * @shost: scsi host pointer * @param: parameter type identifier * @buf: buffer pointer */ static int bnx2i_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param, char *buf) { struct bnx2i_hba *hba = iscsi_host_priv(shost); int len = 0; switch (param) { case ISCSI_HOST_PARAM_HWADDRESS: len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6); break; case ISCSI_HOST_PARAM_NETDEV_NAME: len = sprintf(buf, "%s\n", hba->netdev->name); break; case ISCSI_HOST_PARAM_IPADDRESS: { struct list_head *active_list = &hba->ep_active_list; read_lock_bh(&hba->ep_rdwr_lock); if (!list_empty(&hba->ep_active_list)) { struct bnx2i_endpoint *bnx2i_ep; struct cnic_sock *csk; bnx2i_ep = list_first_entry(active_list, struct bnx2i_endpoint, link); csk = bnx2i_ep->cm_sk; if (test_bit(SK_F_IPV6, &csk->flags)) len = sprintf(buf, "%pI6\n", csk->src_ip); else len = sprintf(buf, "%pI4\n", csk->src_ip); } read_unlock_bh(&hba->ep_rdwr_lock); break; } default: return iscsi_host_get_param(shost, param, buf); } return len; } /** * bnx2i_conn_start - completes iscsi connection migration to FFP * @cls_conn: pointer to iscsi cls conn * * last call in FFP migration to handover iscsi conn to the driver */ static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn) { struct iscsi_conn *conn = cls_conn->dd_data; struct bnx2i_conn *bnx2i_conn = conn->dd_data; bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START; bnx2i_update_iscsi_conn(conn); /* * this should normally not sleep for a long time so it should * not disrupt the caller. */ timer_setup(&bnx2i_conn->ep->ofld_timer, bnx2i_ep_ofld_timer, 0); bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies; add_timer(&bnx2i_conn->ep->ofld_timer); /* update iSCSI context for this conn, wait for CNIC to complete */ wait_event_interruptible(bnx2i_conn->ep->ofld_wait, bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START); if (signal_pending(current)) flush_signals(current); del_timer_sync(&bnx2i_conn->ep->ofld_timer); iscsi_conn_start(cls_conn); return 0; } /** * bnx2i_conn_get_stats - returns iSCSI stats * @cls_conn: pointer to iscsi cls conn * @stats: pointer to iscsi statistic struct */ static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) { struct iscsi_conn *conn = cls_conn->dd_data; stats->txdata_octets = conn->txdata_octets; stats->rxdata_octets = conn->rxdata_octets; stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; stats->dataout_pdus = conn->dataout_pdus_cnt; stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; stats->datain_pdus = conn->datain_pdus_cnt; stats->r2t_pdus = conn->r2t_pdus_cnt; stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; stats->digest_err = 0; stats->timeout_err = 0; strcpy(stats->custom[0].desc, "eh_abort_cnt"); stats->custom[0].value = conn->eh_abort_cnt; stats->custom_length = 1; } /** * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices * @dst_addr: target IP address * * check if route resolves to BNX2 device */ static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr) { struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; struct bnx2i_hba *hba; struct cnic_dev *cnic = NULL; hba = get_adapter_list_head(); if (hba && hba->cnic) cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI); if (!cnic) { printk(KERN_ALERT "bnx2i: no route," "can't connect using cnic\n"); goto no_nx2_route; } hba = bnx2i_find_hba_for_cnic(cnic); if (!hba) goto no_nx2_route; if (bnx2i_adapter_ready(hba)) { printk(KERN_ALERT "bnx2i: check route, hba not found\n"); goto no_nx2_route; } if (hba->netdev->mtu > hba->mtu_supported) { printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n", hba->netdev->name, hba->netdev->mtu); printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n", hba->mtu_supported); goto no_nx2_route; } return hba; no_nx2_route: return NULL; } /** * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources * @hba: pointer to adapter instance * @ep: endpoint (transport identifier) structure * * destroys cm_sock structure and on chip iscsi context */ static int bnx2i_tear_down_conn(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep) { if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk) hba->cnic->cm_destroy(ep->cm_sk); if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) && ep->state == EP_STATE_DISCONN_TIMEDOUT) { if (ep->conn && ep->conn->cls_conn && ep->conn->cls_conn->dd_data) { struct iscsi_conn *conn = ep->conn->cls_conn->dd_data; /* Must suspend all rx queue activity for this ep */ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); } /* CONN_DISCONNECT timeout may or may not be an issue depending * on what transcribed in TCP layer, different targets behave * differently */ printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, " "please submit GRC Dump, NW/PCIe trace, " "driver msgs to developers for analysis\n", hba->netdev->name); } ep->state = EP_STATE_CLEANUP_START; timer_setup(&ep->ofld_timer, bnx2i_ep_ofld_timer, 0); ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies; add_timer(&ep->ofld_timer); bnx2i_ep_destroy_list_add(hba, ep); /* destroy iSCSI context, wait for it to complete */ if (bnx2i_send_conn_destroy(hba, ep)) ep->state = EP_STATE_CLEANUP_CMPL; wait_event_interruptible(ep->ofld_wait, (ep->state != EP_STATE_CLEANUP_START)); if (signal_pending(current)) flush_signals(current); del_timer_sync(&ep->ofld_timer); bnx2i_ep_destroy_list_del(hba, ep); if (ep->state != EP_STATE_CLEANUP_CMPL) /* should never happen */ printk(KERN_ALERT "bnx2i - conn destroy failed\n"); return 0; } /** * bnx2i_ep_connect - establish TCP connection to target portal * @shost: scsi host * @dst_addr: target IP address * @non_blocking: blocking or non-blocking call * * this routine initiates the TCP/IP connection by invoking Option-2 i/f * with l5_core and the CNIC. This is a multi-step process of resolving * route to target, create a iscsi connection context, handshaking with * CNIC module to create/initialize the socket struct and finally * sending down option-2 request to complete TCP 3-way handshake */ static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, int non_blocking) { u32 iscsi_cid = BNX2I_CID_RESERVED; struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; struct sockaddr_in6 *desti6; struct bnx2i_endpoint *bnx2i_ep; struct bnx2i_hba *hba; struct cnic_dev *cnic; struct cnic_sockaddr saddr; struct iscsi_endpoint *ep; int rc = 0; if (shost) { /* driver is given scsi host to work with */ hba = iscsi_host_priv(shost); } else /* * check if the given destination can be reached through * a iscsi capable NetXtreme2 device */ hba = bnx2i_check_route(dst_addr); if (!hba) { rc = -EINVAL; goto nohba; } mutex_lock(&hba->net_dev_lock); if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) { rc = -EPERM; goto check_busy; } cnic = hba->cnic; ep = bnx2i_alloc_ep(hba); if (!ep) { rc = -ENOMEM; goto check_busy; } bnx2i_ep = ep->dd_data; atomic_set(&bnx2i_ep->num_active_cmds, 0); iscsi_cid = bnx2i_alloc_iscsi_cid(hba); if (iscsi_cid == -1) { printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate " "iscsi cid\n", hba->netdev->name); rc = -ENOMEM; bnx2i_free_ep(ep); goto check_busy; } bnx2i_ep->hba_age = hba->age; rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep); if (rc != 0) { printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error" "\n", hba->netdev->name); rc = -ENOMEM; goto qp_resc_err; } bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid; bnx2i_ep->state = EP_STATE_OFLD_START; bnx2i_ep_ofld_list_add(hba, bnx2i_ep); timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0); bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies; add_timer(&bnx2i_ep->ofld_timer); if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) { if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) { printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n", hba->netdev->name, bnx2i_ep->ep_iscsi_cid); rc = -EBUSY; } else rc = -ENOSPC; printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe" "\n", hba->netdev->name); bnx2i_ep_ofld_list_del(hba, bnx2i_ep); goto conn_failed; } /* Wait for CNIC hardware to setup conn context and return 'cid' */ wait_event_interruptible(bnx2i_ep->ofld_wait, bnx2i_ep->state != EP_STATE_OFLD_START); if (signal_pending(current)) flush_signals(current); del_timer_sync(&bnx2i_ep->ofld_timer); bnx2i_ep_ofld_list_del(hba, bnx2i_ep); if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) { if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) { printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n", hba->netdev->name, bnx2i_ep->ep_iscsi_cid); rc = -EBUSY; } else rc = -ENOSPC; goto conn_failed; } rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid, iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep); if (rc) { rc = -EINVAL; /* Need to terminate and cleanup the connection */ goto release_ep; } bnx2i_ep->cm_sk->rcv_buf = 256 * 1024; bnx2i_ep->cm_sk->snd_buf = 256 * 1024; clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags); memset(&saddr, 0, sizeof(saddr)); if (dst_addr->sa_family == AF_INET) { desti = (struct sockaddr_in *) dst_addr; saddr.remote.v4 = *desti; saddr.local.v4.sin_family = desti->sin_family; } else if (dst_addr->sa_family == AF_INET6) { desti6 = (struct sockaddr_in6 *) dst_addr; saddr.remote.v6 = *desti6; saddr.local.v6.sin6_family = desti6->sin6_family; } bnx2i_ep->timestamp = jiffies; bnx2i_ep->state = EP_STATE_CONNECT_START; if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { rc = -EINVAL; goto conn_failed; } else rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr); if (rc) goto release_ep; bnx2i_ep_active_list_add(hba, bnx2i_ep); rc = bnx2i_map_ep_dbell_regs(bnx2i_ep); if (rc) goto del_active_ep; mutex_unlock(&hba->net_dev_lock); return ep; del_active_ep: bnx2i_ep_active_list_del(hba, bnx2i_ep); release_ep: if (bnx2i_tear_down_conn(hba, bnx2i_ep)) { mutex_unlock(&hba->net_dev_lock); return ERR_PTR(rc); } conn_failed: bnx2i_free_qp_resc(hba, bnx2i_ep); qp_resc_err: bnx2i_free_ep(ep); check_busy: mutex_unlock(&hba->net_dev_lock); nohba: return ERR_PTR(rc); } /** * bnx2i_ep_poll - polls for TCP connection establishement * @ep: TCP connection (endpoint) handle * @timeout_ms: timeout value in milli secs * * polls for TCP connect request to complete */ static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) { struct bnx2i_endpoint *bnx2i_ep; int rc = 0; bnx2i_ep = ep->dd_data; if ((bnx2i_ep->state == EP_STATE_IDLE) || (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) || (bnx2i_ep->state == EP_STATE_OFLD_FAILED)) return -1; if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL) return 1; rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait, ((bnx2i_ep->state == EP_STATE_OFLD_FAILED) || (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) || (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)), msecs_to_jiffies(timeout_ms)); if (bnx2i_ep->state == EP_STATE_OFLD_FAILED) rc = -1; if (rc > 0) return 1; else if (!rc) return 0; /* timeout */ else return rc; } /** * bnx2i_ep_tcp_conn_active - check EP state transition * @ep: endpoint pointer * * check if underlying TCP connection is active */ static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep) { int ret; int cnic_dev_10g = 0; if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) cnic_dev_10g = 1; switch (bnx2i_ep->state) { case EP_STATE_CLEANUP_FAILED: case EP_STATE_OFLD_FAILED: case EP_STATE_DISCONN_TIMEDOUT: ret = 0; break; case EP_STATE_CONNECT_START: case EP_STATE_CONNECT_FAILED: case EP_STATE_CONNECT_COMPL: case EP_STATE_ULP_UPDATE_START: case EP_STATE_ULP_UPDATE_COMPL: case EP_STATE_TCP_FIN_RCVD: case EP_STATE_LOGOUT_SENT: case EP_STATE_LOGOUT_RESP_RCVD: case EP_STATE_ULP_UPDATE_FAILED: ret = 1; break; case EP_STATE_TCP_RST_RCVD: if (cnic_dev_10g) ret = 0; else ret = 1; break; default: ret = 0; } return ret; } /* * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw * @ep: TCP connection (bnx2i endpoint) handle * * executes TCP connection teardown process */ int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep) { struct bnx2i_hba *hba = bnx2i_ep->hba; struct cnic_dev *cnic; struct iscsi_session *session = NULL; struct iscsi_conn *conn = NULL; int ret = 0; int close = 0; int close_ret = 0; if (!hba) return 0; cnic = hba->cnic; if (!cnic) return 0; if (bnx2i_ep->state == EP_STATE_IDLE || bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT) return 0; if (!bnx2i_ep_tcp_conn_active(bnx2i_ep)) goto destroy_conn; if (bnx2i_ep->conn) { conn = bnx2i_ep->conn->cls_conn->dd_data; session = conn->session; } timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0); bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies; add_timer(&bnx2i_ep->ofld_timer); if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) goto out; if (session) { spin_lock_bh(&session->frwd_lock); if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) { if (session->state == ISCSI_STATE_LOGGING_OUT) { if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) { /* Logout sent, but no resp */ printk(KERN_ALERT "bnx2i (%s): WARNING" " logout response was not " "received!\n", bnx2i_ep->hba->netdev->name); } else if (bnx2i_ep->state == EP_STATE_LOGOUT_RESP_RCVD) close = 1; } } else close = 1; spin_unlock_bh(&session->frwd_lock); } bnx2i_ep->state = EP_STATE_DISCONN_START; if (close) close_ret = cnic->cm_close(bnx2i_ep->cm_sk); else close_ret = cnic->cm_abort(bnx2i_ep->cm_sk); if (close_ret) printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n", bnx2i_ep->hba->netdev->name, close, close_ret); else /* wait for option-2 conn teardown */ wait_event_interruptible(bnx2i_ep->ofld_wait, ((bnx2i_ep->state != EP_STATE_DISCONN_START) && (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD))); if (signal_pending(current)) flush_signals(current); del_timer_sync(&bnx2i_ep->ofld_timer); destroy_conn: bnx2i_ep_active_list_del(hba, bnx2i_ep); if (bnx2i_tear_down_conn(hba, bnx2i_ep)) return -EINVAL; out: bnx2i_ep->state = EP_STATE_IDLE; return ret; } /** * bnx2i_ep_disconnect - executes TCP connection teardown process * @ep: TCP connection (iscsi endpoint) handle * * executes TCP connection teardown process */ static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep) { struct bnx2i_endpoint *bnx2i_ep; struct bnx2i_conn *bnx2i_conn = NULL; struct iscsi_conn *conn = NULL; struct bnx2i_hba *hba; bnx2i_ep = ep->dd_data; /* driver should not attempt connection cleanup until TCP_CONNECT * completes either successfully or fails. Timeout is 9-secs, so * wait for it to complete */ while ((bnx2i_ep->state == EP_STATE_CONNECT_START) && !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ))) msleep(250); if (bnx2i_ep->conn) { bnx2i_conn = bnx2i_ep->conn; conn = bnx2i_conn->cls_conn->dd_data; iscsi_suspend_queue(conn); } hba = bnx2i_ep->hba; mutex_lock(&hba->net_dev_lock); if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT) goto out; if (bnx2i_ep->state == EP_STATE_IDLE) goto free_resc; if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || (bnx2i_ep->hba_age != hba->age)) { bnx2i_ep_active_list_del(hba, bnx2i_ep); goto free_resc; } /* Do all chip cleanup here */ if (bnx2i_hw_ep_disconnect(bnx2i_ep)) { mutex_unlock(&hba->net_dev_lock); return; } free_resc: bnx2i_free_qp_resc(hba, bnx2i_ep); if (bnx2i_conn) bnx2i_conn->ep = NULL; bnx2i_free_ep(ep); out: mutex_unlock(&hba->net_dev_lock); wake_up_interruptible(&hba->eh_wait); } /** * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler * @buf: pointer to buffer containing iscsi path message * */ static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params) { struct bnx2i_hba *hba = iscsi_host_priv(shost); char *buf = (char *) params; u16 len = sizeof(*params); /* handled by cnic driver */ hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf, len); return 0; } static umode_t bnx2i_attr_is_visible(int param_type, int param) { switch (param_type) { case ISCSI_HOST_PARAM: switch (param) { case ISCSI_HOST_PARAM_NETDEV_NAME: case ISCSI_HOST_PARAM_HWADDRESS: case ISCSI_HOST_PARAM_IPADDRESS: return S_IRUGO; default: return 0; } case ISCSI_PARAM: switch (param) { case ISCSI_PARAM_MAX_RECV_DLENGTH: case ISCSI_PARAM_MAX_XMIT_DLENGTH: case ISCSI_PARAM_HDRDGST_EN: case ISCSI_PARAM_DATADGST_EN: case ISCSI_PARAM_CONN_ADDRESS: case ISCSI_PARAM_CONN_PORT: case ISCSI_PARAM_EXP_STATSN: case ISCSI_PARAM_PERSISTENT_ADDRESS: case ISCSI_PARAM_PERSISTENT_PORT: case ISCSI_PARAM_PING_TMO: case ISCSI_PARAM_RECV_TMO: case ISCSI_PARAM_INITIAL_R2T_EN: case ISCSI_PARAM_MAX_R2T: case ISCSI_PARAM_IMM_DATA_EN: case ISCSI_PARAM_FIRST_BURST: case ISCSI_PARAM_MAX_BURST: case ISCSI_PARAM_PDU_INORDER_EN: case ISCSI_PARAM_DATASEQ_INORDER_EN: case ISCSI_PARAM_ERL: case ISCSI_PARAM_TARGET_NAME: case ISCSI_PARAM_TPGT: case ISCSI_PARAM_USERNAME: case ISCSI_PARAM_PASSWORD: case ISCSI_PARAM_USERNAME_IN: case ISCSI_PARAM_PASSWORD_IN: case ISCSI_PARAM_FAST_ABORT: case ISCSI_PARAM_ABORT_TMO: case ISCSI_PARAM_LU_RESET_TMO: case ISCSI_PARAM_TGT_RESET_TMO: case ISCSI_PARAM_IFACE_NAME: case ISCSI_PARAM_INITIATOR_NAME: case ISCSI_PARAM_BOOT_ROOT: case ISCSI_PARAM_BOOT_NIC: case ISCSI_PARAM_BOOT_TARGET: return S_IRUGO; default: return 0; } } return 0; } /* * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template * used while registering with the scsi host and iSCSI transport module. */ static struct scsi_host_template bnx2i_host_template = { .module = THIS_MODULE, .name = "QLogic Offload iSCSI Initiator", .proc_name = "bnx2i", .queuecommand = iscsi_queuecommand, .eh_timed_out = iscsi_eh_cmd_timed_out, .eh_abort_handler = iscsi_eh_abort, .eh_device_reset_handler = iscsi_eh_device_reset, .eh_target_reset_handler = iscsi_eh_recover_target, .change_queue_depth = scsi_change_queue_depth, .target_alloc = iscsi_target_alloc, .can_queue = 2048, .max_sectors = 127, .cmd_per_lun = 128, .this_id = -1, .sg_tablesize = ISCSI_MAX_BDS_PER_CMD, .shost_attrs = bnx2i_dev_attributes, .track_queue_depth = 1, }; struct iscsi_transport bnx2i_iscsi_transport = { .owner = THIS_MODULE, .name = "bnx2i", .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, .create_session = bnx2i_session_create, .destroy_session = bnx2i_session_destroy, .create_conn = bnx2i_conn_create, .bind_conn = bnx2i_conn_bind, .destroy_conn = bnx2i_conn_destroy, .attr_is_visible = bnx2i_attr_is_visible, .set_param = iscsi_set_param, .get_conn_param = iscsi_conn_get_param, .get_session_param = iscsi_session_get_param, .get_host_param = bnx2i_host_get_param, .start_conn = bnx2i_conn_start, .stop_conn = iscsi_conn_stop, .send_pdu = iscsi_conn_send_pdu, .xmit_task = bnx2i_task_xmit, .get_stats = bnx2i_conn_get_stats, /* TCP connect - disconnect - option-2 interface calls */ .get_ep_param = bnx2i_ep_get_param, .ep_connect = bnx2i_ep_connect, .ep_poll = bnx2i_ep_poll, .ep_disconnect = bnx2i_ep_disconnect, .set_path = bnx2i_nl_set_path, /* Error recovery timeout call */ .session_recovery_timedout = iscsi_session_recovery_timedout, .cleanup_task = bnx2i_cleanup_task, };
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