| /* |
| * 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; |
| |
| 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; |
| |
| 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); |
| wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl, |
| msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT)); |
| 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. |
| */ |
| bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies; |
| bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
| bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep; |
| 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; |
| init_timer(&ep->ofld_timer); |
| ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies; |
| ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
| ep->ofld_timer.data = (unsigned long) ep; |
| 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); |
| |
| init_timer(&bnx2i_ep->ofld_timer); |
| bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies; |
| bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
| bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; |
| 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); |
| |
| if (bnx2i_map_ep_dbell_regs(bnx2i_ep)) |
| 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; |
| } |
| |
| init_timer(&bnx2i_ep->ofld_timer); |
| bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies; |
| bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
| bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; |
| 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); |
| |
| 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_abort_handler = iscsi_eh_abort, |
| .eh_device_reset_handler = iscsi_eh_device_reset, |
| .eh_target_reset_handler = iscsi_eh_recover_target, |
| .change_queue_depth = iscsi_change_queue_depth, |
| .target_alloc = iscsi_target_alloc, |
| .can_queue = 2048, |
| .max_sectors = 127, |
| .cmd_per_lun = 128, |
| .this_id = -1, |
| .use_clustering = ENABLE_CLUSTERING, |
| .sg_tablesize = ISCSI_MAX_BDS_PER_CMD, |
| .shost_attrs = bnx2i_dev_attributes, |
| }; |
| |
| 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, |
| }; |