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2299 lines
62 KiB
2299 lines
62 KiB
/* |
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* bnx2i_iscsi.c: QLogic NetXtreme II iSCSI driver. |
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* |
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* Copyright (c) 2006 - 2013 Broadcom Corporation |
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* Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. |
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* Copyright (c) 2007, 2008 Mike Christie |
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* Copyright (c) 2014, QLogic Corporation |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation. |
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* |
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* Written by: Anil Veerabhadrappa ([email protected]) |
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* Previously Maintained by: Eddie Wai ([email protected]) |
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* Maintained by: [email protected] |
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*/ |
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|
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#include <linux/slab.h> |
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#include <scsi/scsi_tcq.h> |
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#include <scsi/libiscsi.h> |
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#include "bnx2i.h" |
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|
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struct scsi_transport_template *bnx2i_scsi_xport_template; |
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struct iscsi_transport bnx2i_iscsi_transport; |
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static struct scsi_host_template bnx2i_host_template; |
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|
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/* |
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* Global endpoint resource info |
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*/ |
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static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */ |
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DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu); |
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static int bnx2i_adapter_ready(struct bnx2i_hba *hba) |
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{ |
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int retval = 0; |
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|
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if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || |
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test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) || |
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test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state)) |
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retval = -EPERM; |
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return retval; |
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} |
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|
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/** |
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* bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks |
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* @cmd: iscsi cmd struct pointer |
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* @buf_off: absolute buffer offset |
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* @start_bd_off: u32 pointer to return the offset within the BD |
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* indicated by 'start_bd_idx' on which 'buf_off' falls |
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* @start_bd_idx: index of the BD on which 'buf_off' falls |
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* |
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* identifies & marks various bd info for scsi command's imm data, |
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* unsolicited data and the first solicited data seq. |
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*/ |
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static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off, |
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u32 *start_bd_off, u32 *start_bd_idx) |
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{ |
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struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl; |
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u32 cur_offset = 0; |
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u32 cur_bd_idx = 0; |
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|
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if (buf_off) { |
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while (buf_off >= (cur_offset + bd_tbl->buffer_length)) { |
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cur_offset += bd_tbl->buffer_length; |
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cur_bd_idx++; |
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bd_tbl++; |
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} |
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} |
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*start_bd_off = buf_off - cur_offset; |
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*start_bd_idx = cur_bd_idx; |
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} |
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|
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/** |
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* bnx2i_setup_write_cmd_bd_info - sets up BD various information |
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* @task: transport layer's cmd struct pointer |
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* |
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* identifies & marks various bd info for scsi command's immediate data, |
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* unsolicited data and first solicited data seq which includes BD start |
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* index & BD buf off. his function takes into account iscsi parameter such |
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* as immediate data and unsolicited data is support on this connection. |
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*/ |
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static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task) |
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{ |
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struct bnx2i_cmd *cmd = task->dd_data; |
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u32 start_bd_offset; |
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u32 start_bd_idx; |
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u32 buffer_offset = 0; |
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u32 cmd_len = cmd->req.total_data_transfer_length; |
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|
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/* if ImmediateData is turned off & IntialR2T is turned on, |
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* there will be no immediate or unsolicited data, just return. |
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*/ |
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if (!iscsi_task_has_unsol_data(task) && !task->imm_count) |
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return; |
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|
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/* Immediate data */ |
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buffer_offset += task->imm_count; |
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if (task->imm_count == cmd_len) |
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return; |
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if (iscsi_task_has_unsol_data(task)) { |
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bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, |
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&start_bd_offset, &start_bd_idx); |
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cmd->req.ud_buffer_offset = start_bd_offset; |
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cmd->req.ud_start_bd_index = start_bd_idx; |
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buffer_offset += task->unsol_r2t.data_length; |
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} |
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if (buffer_offset != cmd_len) { |
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bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, |
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&start_bd_offset, &start_bd_idx); |
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if ((start_bd_offset > task->conn->session->first_burst) || |
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(start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) { |
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int i = 0; |
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iscsi_conn_printk(KERN_ALERT, task->conn, |
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"bnx2i- error, buf offset 0x%x " |
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"bd_valid %d use_sg %d\n", |
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buffer_offset, cmd->io_tbl.bd_valid, |
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scsi_sg_count(cmd->scsi_cmd)); |
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for (i = 0; i < cmd->io_tbl.bd_valid; i++) |
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iscsi_conn_printk(KERN_ALERT, task->conn, |
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"bnx2i err, bd[%d]: len %x\n", |
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i, cmd->io_tbl.bd_tbl[i].\ |
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buffer_length); |
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} |
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cmd->req.sd_buffer_offset = start_bd_offset; |
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cmd->req.sd_start_bd_index = start_bd_idx; |
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} |
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} |
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/** |
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* bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table |
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* @hba: adapter instance |
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* @cmd: iscsi cmd struct pointer |
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* |
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* map SG list |
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*/ |
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static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) |
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{ |
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struct scsi_cmnd *sc = cmd->scsi_cmd; |
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struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; |
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struct scatterlist *sg; |
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int byte_count = 0; |
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int bd_count = 0; |
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int sg_count; |
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int sg_len; |
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u64 addr; |
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int i; |
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BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD); |
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sg_count = scsi_dma_map(sc); |
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scsi_for_each_sg(sc, sg, sg_count, i) { |
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sg_len = sg_dma_len(sg); |
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addr = (u64) sg_dma_address(sg); |
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bd[bd_count].buffer_addr_lo = addr & 0xffffffff; |
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bd[bd_count].buffer_addr_hi = addr >> 32; |
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bd[bd_count].buffer_length = sg_len; |
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bd[bd_count].flags = 0; |
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if (bd_count == 0) |
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bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN; |
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byte_count += sg_len; |
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bd_count++; |
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} |
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if (bd_count) |
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bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN; |
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BUG_ON(byte_count != scsi_bufflen(sc)); |
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return bd_count; |
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} |
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|
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/** |
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* bnx2i_iscsi_map_sg_list - maps SG list |
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* @cmd: iscsi cmd struct pointer |
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* |
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* creates BD list table for the command |
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*/ |
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static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd) |
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{ |
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int bd_count; |
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bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd); |
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if (!bd_count) { |
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struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; |
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|
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bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0; |
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bd[0].buffer_length = bd[0].flags = 0; |
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} |
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cmd->io_tbl.bd_valid = bd_count; |
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} |
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/** |
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* bnx2i_iscsi_unmap_sg_list - unmaps SG list |
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* @cmd: iscsi cmd struct pointer |
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* |
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* unmap IO buffers and invalidate the BD table |
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*/ |
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void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd) |
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{ |
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struct scsi_cmnd *sc = cmd->scsi_cmd; |
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|
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if (cmd->io_tbl.bd_valid && sc) { |
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scsi_dma_unmap(sc); |
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cmd->io_tbl.bd_valid = 0; |
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} |
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} |
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static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd) |
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{ |
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memset(&cmd->req, 0x00, sizeof(cmd->req)); |
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cmd->req.op_code = 0xFF; |
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cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma; |
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cmd->req.bd_list_addr_hi = |
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(u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32); |
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|
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} |
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/** |
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* bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid' |
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* @hba: pointer to adapter instance |
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* @bnx2i_conn: pointer to iscsi connection |
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* @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) |
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* |
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* update iscsi cid table entry with connection pointer. This enables |
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* driver to quickly get hold of connection structure pointer in |
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* completion/interrupt thread using iscsi context ID |
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*/ |
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static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba, |
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struct bnx2i_conn *bnx2i_conn, |
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u32 iscsi_cid) |
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{ |
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if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) { |
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iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, |
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"conn bind - entry #%d not free\n", iscsi_cid); |
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return -EBUSY; |
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} |
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hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn; |
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return 0; |
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} |
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|
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/** |
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* bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr |
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* @hba: pointer to adapter instance |
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* @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) |
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*/ |
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struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, |
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u16 iscsi_cid) |
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{ |
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if (!hba->cid_que.conn_cid_tbl) { |
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printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n"); |
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return NULL; |
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} else if (iscsi_cid >= hba->max_active_conns) { |
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printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid); |
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return NULL; |
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} |
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return hba->cid_que.conn_cid_tbl[iscsi_cid]; |
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} |
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/** |
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* bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool |
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* @hba: pointer to adapter instance |
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*/ |
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static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba) |
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{ |
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int idx; |
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if (!hba->cid_que.cid_free_cnt) |
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return -1; |
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idx = hba->cid_que.cid_q_cons_idx; |
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hba->cid_que.cid_q_cons_idx++; |
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if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx) |
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hba->cid_que.cid_q_cons_idx = 0; |
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hba->cid_que.cid_free_cnt--; |
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return hba->cid_que.cid_que[idx]; |
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} |
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/** |
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* bnx2i_free_iscsi_cid - returns tcp port to free list |
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* @hba: pointer to adapter instance |
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* @iscsi_cid: iscsi context ID to free |
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*/ |
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static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid) |
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{ |
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int idx; |
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if (iscsi_cid == (u16) -1) |
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return; |
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hba->cid_que.cid_free_cnt++; |
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idx = hba->cid_que.cid_q_prod_idx; |
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hba->cid_que.cid_que[idx] = iscsi_cid; |
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hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL; |
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hba->cid_que.cid_q_prod_idx++; |
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if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx) |
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hba->cid_que.cid_q_prod_idx = 0; |
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} |
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|
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/** |
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* bnx2i_setup_free_cid_que - sets up free iscsi cid queue |
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* @hba: pointer to adapter instance |
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* |
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* allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table, |
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* and initialize table attributes |
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*/ |
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static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba) |
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{ |
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int mem_size; |
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int i; |
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mem_size = hba->max_active_conns * sizeof(u32); |
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mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; |
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hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL); |
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if (!hba->cid_que.cid_que_base) |
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return -ENOMEM; |
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mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *); |
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mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; |
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hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL); |
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if (!hba->cid_que.conn_cid_tbl) { |
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kfree(hba->cid_que.cid_que_base); |
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hba->cid_que.cid_que_base = NULL; |
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return -ENOMEM; |
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} |
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hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base; |
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hba->cid_que.cid_q_prod_idx = 0; |
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hba->cid_que.cid_q_cons_idx = 0; |
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hba->cid_que.cid_q_max_idx = hba->max_active_conns; |
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hba->cid_que.cid_free_cnt = hba->max_active_conns; |
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|
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for (i = 0; i < hba->max_active_conns; i++) { |
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hba->cid_que.cid_que[i] = i; |
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hba->cid_que.conn_cid_tbl[i] = NULL; |
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} |
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return 0; |
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} |
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|
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|
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/** |
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* bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources |
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* @hba: pointer to adapter instance |
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*/ |
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static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba) |
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{ |
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kfree(hba->cid_que.cid_que_base); |
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hba->cid_que.cid_que_base = NULL; |
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|
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kfree(hba->cid_que.conn_cid_tbl); |
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hba->cid_que.conn_cid_tbl = NULL; |
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} |
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|
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/** |
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* bnx2i_alloc_ep - allocates ep structure from global pool |
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* @hba: pointer to adapter instance |
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* |
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* routine allocates a free endpoint structure from global pool and |
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* a tcp port to be used for this connection. Global resource lock, |
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* 'bnx2i_resc_lock' is held while accessing shared global data structures |
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*/ |
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static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba) |
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{ |
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struct iscsi_endpoint *ep; |
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struct bnx2i_endpoint *bnx2i_ep; |
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u32 ec_div; |
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|
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ep = iscsi_create_endpoint(sizeof(*bnx2i_ep)); |
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if (!ep) { |
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printk(KERN_ERR "bnx2i: Could not allocate ep\n"); |
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return NULL; |
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} |
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|
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bnx2i_ep = ep->dd_data; |
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bnx2i_ep->cls_ep = ep; |
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INIT_LIST_HEAD(&bnx2i_ep->link); |
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bnx2i_ep->state = EP_STATE_IDLE; |
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bnx2i_ep->ep_iscsi_cid = (u16) -1; |
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bnx2i_ep->hba = hba; |
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bnx2i_ep->hba_age = hba->age; |
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|
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ec_div = event_coal_div; |
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while (ec_div >>= 1) |
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bnx2i_ep->ec_shift += 1; |
|
|
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hba->ofld_conns_active++; |
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init_waitqueue_head(&bnx2i_ep->ofld_wait); |
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return ep; |
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} |
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|
|
|
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/** |
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* bnx2i_free_ep - free endpoint |
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* @ep: pointer to iscsi endpoint structure |
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*/ |
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static void bnx2i_free_ep(struct iscsi_endpoint *ep) |
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{ |
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struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; |
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unsigned long flags; |
|
|
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spin_lock_irqsave(&bnx2i_resc_lock, flags); |
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bnx2i_ep->state = EP_STATE_IDLE; |
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bnx2i_ep->hba->ofld_conns_active--; |
|
|
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if (bnx2i_ep->ep_iscsi_cid != (u16) -1) |
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bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid); |
|
|
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if (bnx2i_ep->conn) { |
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bnx2i_ep->conn->ep = NULL; |
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bnx2i_ep->conn = NULL; |
|
} |
|
|
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bnx2i_ep->hba = NULL; |
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spin_unlock_irqrestore(&bnx2i_resc_lock, flags); |
|
iscsi_destroy_endpoint(ep); |
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} |
|
|
|
|
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/** |
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* bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command |
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* @hba: adapter instance pointer |
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* @session: iscsi session pointer |
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* @cmd: iscsi command structure |
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*/ |
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static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session, |
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struct bnx2i_cmd *cmd) |
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{ |
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struct io_bdt *io = &cmd->io_tbl; |
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struct iscsi_bd *bd; |
|
|
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io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, |
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ISCSI_MAX_BDS_PER_CMD * sizeof(*bd), |
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&io->bd_tbl_dma, GFP_KERNEL); |
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if (!io->bd_tbl) { |
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iscsi_session_printk(KERN_ERR, session, "Could not " |
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"allocate bdt.\n"); |
|
return -ENOMEM; |
|
} |
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io->bd_valid = 0; |
|
return 0; |
|
} |
|
|
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/** |
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* bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table |
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* @hba: adapter instance pointer |
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* @session: iscsi session pointer |
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*/ |
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static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba, |
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struct iscsi_session *session) |
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{ |
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int i; |
|
|
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for (i = 0; i < session->cmds_max; i++) { |
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struct iscsi_task *task = session->cmds[i]; |
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struct bnx2i_cmd *cmd = task->dd_data; |
|
|
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if (cmd->io_tbl.bd_tbl) |
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dma_free_coherent(&hba->pcidev->dev, |
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ISCSI_MAX_BDS_PER_CMD * |
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sizeof(struct iscsi_bd), |
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cmd->io_tbl.bd_tbl, |
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cmd->io_tbl.bd_tbl_dma); |
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} |
|
|
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} |
|
|
|
|
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/** |
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* bnx2i_setup_cmd_pool - sets up iscsi command pool for the session |
|
* @hba: adapter instance pointer |
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* @session: iscsi session pointer |
|
*/ |
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static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba, |
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struct iscsi_session *session) |
|
{ |
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int i; |
|
|
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for (i = 0; i < session->cmds_max; i++) { |
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struct iscsi_task *task = session->cmds[i]; |
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struct bnx2i_cmd *cmd = task->dd_data; |
|
|
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task->hdr = &cmd->hdr; |
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task->hdr_max = sizeof(struct iscsi_hdr); |
|
|
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if (bnx2i_alloc_bdt(hba, session, cmd)) |
|
goto free_bdts; |
|
} |
|
|
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return 0; |
|
|
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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. |
|
* @cls_session: iscsi cls 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); |
|
|
|
if (hba->regview) { |
|
pci_iounmap(hba->pcidev, hba->regview); |
|
hba->regview = NULL; |
|
} |
|
pci_dev_put(hba->pcidev); |
|
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 |
|
* @ep: pointer to iscsi endpoint |
|
* @cmds_max: user specified maximum commands |
|
* @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 |
|
* @bnx2i_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 |
|
* @bnx2i_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 |
|
* @shost: scsi host pointer |
|
* @params: 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, |
|
};
|
|
|