diff options
Diffstat (limited to 'drivers/scsi/bnx2i/bnx2i_iscsi.c')
| -rw-r--r-- | drivers/scsi/bnx2i/bnx2i_iscsi.c | 2064 |
1 files changed, 2064 insertions, 0 deletions
diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c new file mode 100644 index 000000000000..f7412196f2f8 --- /dev/null +++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c @@ -0,0 +1,2064 @@ +/* + * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver. + * + * Copyright (c) 2006 - 2009 Broadcom Corporation + * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. + * Copyright (c) 2007, 2008 Mike Christie + * + * 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) + */ + +#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 */ + + +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; + + 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; + INIT_LIST_HEAD(&bnx2i_ep->link); + bnx2i_ep->state = EP_STATE_IDLE; + bnx2i_ep->hba = hba; + bnx2i_ep->hba_age = hba->age; + 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--; + + 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; + + /* Anil */ + 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, 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, 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, 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 = 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, 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, 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 indentifier) 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 indentifier) 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 indentifier) 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 indentifier) 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_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); + + bnx2i_identify_device(hba); + bnx2i_setup_host_queue_size(hba, shost); + + if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { + hba->regview = ioremap_nocache(hba->netdev->base_addr, + BNX2_MQ_CONFIG2); + if (!hba->regview) + goto ioreg_map_err; + } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { + hba->regview = ioremap_nocache(hba->netdev->base_addr, 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_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); + + 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) { + iounmap(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_destroy_list); + pci_dev_put(hba->pcidev); + + if (hba->regview) { + iounmap(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, 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, 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, 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, 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, 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, + RESERVED_ITT, + buf, data_len, 1); + else + rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, + RESERVED_ITT, + 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; + 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->lock); + wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl, + msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT)); + spin_lock_bh(&conn->session->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_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; + 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 |