| /* | |
| * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver. | |
| * | |
| * Copyright (c) 2006 - 2008 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) | |
| * Maintain by: Eddie Wai (eddie.wai@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; | |
| extern unsigned int en_tcp_dack; | |
| #ifdef _BNX2I_IOCTL_ | |
| extern u16 bnx2i_alloc_tcp_port(void); | |
| extern void bnx2i_free_tcp_port(u16 port); | |
| #endif | |
| /* | |
| * 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; | |
| u32 unsol_count = task->unsol_count; | |
| /* if ImmediateData is turned off & IntialR2T is turned on, | |
| * there will be no immediate or unsolicited data, just return. | |
| */ | |
| /* TODO - check if this is correct, Anil | |
| */ | |
| if (!unsol_count && !task->imm_count) | |
| return; | |
| /* Immediate data */ | |
| buffer_offset += task->imm_count; | |
| if (task->imm_count == cmd_len) | |
| return; | |
| if (unsol_count/*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_count; | |
| } | |
| 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: hba=0x%p, wrong cid #%d, Max %d\n", hba, iscsi_cid, hba->max_active_conns); | |
| 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; | |
| #ifdef _BNX2I_IOCTL_ | |
| u16 tcp_port; | |
| tcp_port = bnx2i_alloc_tcp_port(); | |
| if (!tcp_port) { | |
| printk(KERN_ERR "bnx2i: unable to allocate tcp ports, " | |
| "make sure 'bnx2id' is running\n"); | |
| return NULL; | |
| } | |
| #endif | |
| 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->ep_iscsi_cid = (u16) -1; | |
| bnx2i_ep->hba = hba; | |
| bnx2i_ep->hba_age = hba->age; | |
| #ifdef _BNX2I_IOCTL_ | |
| bnx2i_ep->tcp_port = tcp_port; | |
| #else | |
| bnx2i_ep->tcp_port = 0; | |
| #endif | |
| 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; | |
| } | |
| #ifdef _BNX2I_IOCTL_ | |
| if (bnx2i_ep->tcp_port) | |
| bnx2i_free_tcp_port(bnx2i_ep->tcp_port); | |
| #endif | |
| 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 = (struct iscsi_cmd *)&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, 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_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_conn *conn, | |
| struct iscsi_task *task) | |
| { | |
| 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 (conn->tmf_state == TMF_SUCCESS) { | |
| bnx2i_send_cmd_cleanup_req(hba, task->dd_data); | |
| spin_unlock(&conn->session->lock); | |
| /* This was made to be an interruptible wait as the | |
| * cmd_cleanup_cmpl struct is updated in the int context */ | |
| wait_for_completion_interruptible_timeout( | |
| &bnx2i_conn->cmd_cleanup_cmpl, | |
| msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT)); | |
| spin_lock(&conn->session->lock); | |
| } | |
| /* | |
| * check task again incase the command completed while we were | |
| * cleaning it up and session lock was dropped. | |
| */ | |
| if (!task->sc) | |
| 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 = 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_cmd *hdr = (struct iscsi_cmd *) task->hdr; | |
| if (!bnx2i_conn->is_bound) | |
| return -ENOTCONN; | |
| /* | |
| * If there is no scsi_cmnd this must be a mgmt task | |
| */ | |
| if (!sc) | |
| return bnx2i_mtask_xmit(conn, task); | |
| bnx2i_setup_cmd_wqe_template(cmd); | |
| cmd->req.op_code = ISCSI_OP_SCSI_CMD; | |
| cmd->conn = bnx2i_conn; | |
| cmd->scsi_cmd = sc; | |
| cmd->req.total_data_transfer_length = scsi_bufflen(sc); | |
| cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn); | |
| bnx2i_iscsi_map_sg_list(cmd); | |
| bnx2i_cpy_scsi_cdb(sc, cmd); | |
| cmd->req.op_attr = ISCSI_ATTR_SIMPLE; | |
| if (sc->sc_data_direction == DMA_TO_DEVICE) { | |
| cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE; | |
| cmd->req.itt = task->itt | | |
| (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT); | |
| bnx2i_setup_write_cmd_bd_info(task); | |
| } else { | |
| if (scsi_bufflen(sc)) | |
| cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ; | |
| cmd->req.itt = task->itt | | |
| (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT); | |
| } | |
| cmd->req.num_bds = cmd->io_tbl.bd_valid; | |
| if (!cmd->io_tbl.bd_valid) { | |
| cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma; | |
| cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32); | |
| cmd->req.num_bds = 1; | |
| } | |
| bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd); | |
| return 0; | |
| } | |
| /** | |
| * bnx2i_session_create - create a new iscsi session | |
| * @cmds_max: max commands supported | |
| * @qdepth: scsi queue depth to support | |
| * @initial_cmdsn: initial iscsi CMDSN to be used for this session | |
| * | |
| * Creates a new iSCSI session instance on given device. | |
| */ | |
| static struct iscsi_cls_session * | |
| bnx2i_session_create(struct iscsi_endpoint *ep, | |
| uint16_t cmds_max, uint16_t qdepth, | |
| uint32_t initial_cmdsn, uint32_t *host_no) | |
| { | |
| 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, 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; | |
| *host_no = shost->host_no; | |
| 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; | |
| /* '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; | |
| 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; | |
| bnx2i_conn->is_bound = 1; | |
| 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; | |
| shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); | |
| hba = iscsi_host_priv(shost); | |
| bnx2i_conn_free_login_resources(hba, bnx2i_conn); | |
| iscsi_conn_teardown(cls_conn); | |
| } | |
| /** | |
| * bnx2i_conn_get_param - return iscsi connection parameter to caller | |
| * @cls_conn: pointer to iscsi cls conn | |
| * @param: parameter type identifier | |
| * @buf: buffer pointer | |
| * | |
| * returns iSCSI connection parameters | |
| */ | |
| static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn, | |
| enum iscsi_param param, char *buf) | |
| { | |
| struct iscsi_conn *conn = cls_conn->dd_data; | |
| struct bnx2i_conn *bnx2i_conn = conn->dd_data; | |
| int len = 0; | |
| switch (param) { | |
| case ISCSI_PARAM_CONN_PORT: | |
| if (bnx2i_conn->ep) | |
| len = sprintf(buf, "%hu\n", | |
| bnx2i_conn->ep->cm_sk->dst_port); | |
| break; | |
| case ISCSI_PARAM_CONN_ADDRESS: | |
| if (bnx2i_conn->ep) | |
| len = sprintf(buf, NIPQUAD_FMT "\n", | |
| NIPQUAD(bnx2i_conn->ep->cm_sk->dst_ip)); | |
| break; | |
| default: | |
| return iscsi_conn_get_param(cls_conn, param, buf); | |
| } | |
| return len; | |
| } | |
| static ssize_t format_addr(char *buf, const unsigned char *addr, int len) | |
| { | |
| int i; | |
| char *cp = buf; | |
| for (i = 0; i < len; i++) | |
| cp += sprintf(cp, "%02x%c", addr[i], | |
| i == (len - 1) ? '\n' : ':'); | |
| return cp - buf; | |
| } | |
| /** | |
| * 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 = format_addr(buf, hba->netdev->dev_addr, 6); | |
| break; | |
| case ISCSI_HOST_PARAM_NETDEV_NAME: | |
| len = sprintf(buf, "%s\n", hba->netdev->name); | |
| break; | |
| default: | |
| return iscsi_host_get_param(shost, param, buf); | |
| } | |
| return len; | |
| } | |
| /** | |
| * bnx2i_conn_start - completes iscsi connection migration to FFP | |
| * @cls_conn: pointer to iscsi cls conn | |
| * | |
| * last call in FFP migration to handover iscsi conn to the driver | |
| */ | |
| static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn) | |
| { | |
| struct iscsi_conn *conn = cls_conn->dd_data; | |
| struct bnx2i_conn *bnx2i_conn = conn->dd_data; | |
| bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START; | |
| bnx2i_update_iscsi_conn(conn); | |
| /* | |
| * this should normally not sleep for a long time so it should | |
| * not disrupt the caller. | |
| */ | |
| bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies; | |
| bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer; | |
| bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep; | |
| add_timer(&bnx2i_conn->ep->ofld_timer); | |
| /* update iSCSI context for this conn, wait for CNIC to complete */ | |
| wait_event_interruptible(bnx2i_conn->ep->ofld_wait, | |
| bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START); | |
| if (signal_pending(current)) | |
| flush_signals(current); | |
| del_timer_sync(&bnx2i_conn->ep->ofld_timer); | |
| iscsi_conn_start(cls_conn); | |
| return 0; | |
| } | |
| /** | |
| * bnx2i_conn_get_stats - returns iSCSI stats | |
| * @cls_conn: pointer to iscsi cls conn | |
| * @stats: pointer to iscsi statistic struct | |
| */ | |
| static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn, | |
| struct iscsi_stats *stats) | |
| { | |
| struct iscsi_conn *conn = cls_conn->dd_data; | |
| stats->txdata_octets = conn->txdata_octets; | |
| stats->rxdata_octets = conn->rxdata_octets; | |
| stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
| stats->dataout_pdus = conn->dataout_pdus_cnt; | |
| stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
| stats->datain_pdus = conn->datain_pdus_cnt; | |
| stats->r2t_pdus = conn->r2t_pdus_cnt; | |
| stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
| stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
| stats->custom_length = 3; | |
| strcpy(stats->custom[2].desc, "eh_abort_cnt"); | |
| stats->custom[2].value = conn->eh_abort_cnt; | |
| stats->digest_err = 0; | |
| stats->timeout_err = 0; | |
| stats->custom_length = 0; | |
| } | |
| /** | |
| * 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; | |
| bnx2i_reg_dev_all(); | |
| 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 indentifier) 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)) | |
| hba->cnic->cm_destroy(ep->cm_sk); | |
| if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) | |
| ep->state = EP_STATE_DISCONN_COMPL; | |
| if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) && | |
| ep->state == EP_STATE_DISCONN_TIMEDOUT) { | |
| printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump," | |
| " NW/PCIe trace, driver msgs to developers" | |
| " for analysis\n"); | |
| return 1; | |
| } | |
| ep->state = EP_STATE_CLEANUP_START; | |
| init_timer(&ep->ofld_timer); | |
| ep->ofld_timer.expires = 10*HZ + jiffies; | |
| ep->ofld_timer.function = bnx2i_ep_ofld_timer; | |
| ep->ofld_timer.data = (unsigned long) ep; | |
| add_timer(&ep->ofld_timer); | |
| bnx2i_ep_destroy_list_add(hba, ep); | |
| /* destroy iSCSI context, wait for it to complete */ | |
| bnx2i_send_conn_destroy(hba, ep); | |
| 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 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; | |
| /* | |
| * check if the given destination can be reached through | |
| * a iscsi capable NetXtreme2 device | |
| */ | |
| hba = bnx2i_check_route(dst_addr); | |
| if (!hba) { | |
| rc = -ENOMEM; | |
| goto check_busy; | |
| } | |
| cnic = hba->cnic; | |
| ep = bnx2i_alloc_ep(hba); | |
| if (!ep) { | |
| rc = -ENOMEM; | |
| goto check_busy; | |
| } | |
| bnx2i_ep = ep->dd_data; | |
| mutex_lock(&hba->net_dev_lock); | |
| if (bnx2i_adapter_ready(hba)) { | |
| rc = -EPERM; | |
| goto net_if_down; | |
| } | |
| bnx2i_ep->num_active_cmds = 0; | |
| iscsi_cid = bnx2i_alloc_iscsi_cid(hba); | |
| if (iscsi_cid == -1) { | |
| printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n"); | |
| rc = -ENOMEM; | |
| goto iscsi_cid_err; | |
| } | |
| bnx2i_ep->hba_age = hba->age; | |
| rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep); | |
| if (rc != 0) { | |
| printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n"); | |
| rc = -ENOMEM; | |
| goto qp_resc_err; | |
| } | |
| bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid; | |
| bnx2i_ep->state = EP_STATE_OFLD_START; | |
| bnx2i_ep_ofld_list_add(hba, bnx2i_ep); | |
| init_timer(&bnx2i_ep->ofld_timer); | |
| bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies; | |
| bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; | |
| bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; | |
| add_timer(&bnx2i_ep->ofld_timer); | |
| bnx2i_send_conn_ofld_req(hba, bnx2i_ep); | |
| /* 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) { | |
| 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; | |
| goto conn_failed; | |
| } | |
| bnx2i_ep->cm_sk->rcv_buf = 256 * 1024; | |
| bnx2i_ep->cm_sk->snd_buf = 256 * 1024; | |
| if (!en_tcp_dack) | |
| bnx2i_ep->cm_sk->tcp_flags |= SK_TCP_NO_DELAY_ACK; | |
| bnx2i_ep->cm_sk->tcp_flags |= SK_TCP_TIMESTAMP; | |
| memset(&saddr, 0, sizeof(saddr)); | |
| if (dst_addr->sa_family == AF_INET) { | |
| desti = (struct sockaddr_in *) dst_addr; | |
| #ifdef _BNX2I_IOCTL_ | |
| saddr.local.v4.sin_port = htons(bnx2i_ep->tcp_port); | |
| #endif | |
| 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; | |
| #ifdef _BNX2I_IOCTL_ | |
| saddr.local.v6.sin6_port = htons(bnx2i_ep->tcp_port); | |
| #endif | |
| 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; | |
| if (bnx2i_map_ep_dbell_regs(bnx2i_ep)) | |
| goto release_ep; | |
| mutex_unlock(&hba->net_dev_lock); | |
| return ep; | |
| release_ep: | |
| if (bnx2i_tear_down_conn(hba, bnx2i_ep)) { | |
| mutex_unlock(&hba->net_dev_lock); | |
| return ERR_PTR(rc); | |
| } | |
| conn_failed: | |
| net_if_down: | |
| iscsi_cid_err: | |
| bnx2i_free_qp_resc(hba, bnx2i_ep); | |
| qp_resc_err: | |
| bnx2i_free_ep(ep); | |
| mutex_unlock(&hba->net_dev_lock); | |
| check_busy: | |
| bnx2i_unreg_dev_all(); | |
| 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 (!rc || (bnx2i_ep->state == EP_STATE_OFLD_FAILED)) | |
| rc = -1; | |
| if (rc > 0) | |
| return 1; | |
| else if (!rc) | |
| return 0; /* timeout */ | |
| else | |
| return rc; | |
| } | |
| /** | |
| * bnx2i_ep_tcp_conn_active - check EP state transition | |
| * @ep: endpoint pointer | |
| * | |
| * check if underlying TCP connection is active | |
| */ | |
| static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep) | |
| { | |
| int ret; | |
| int cnic_dev_10g = 0; | |
| if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) | |
| cnic_dev_10g = 1; | |
| switch (bnx2i_ep->state) { | |
| case EP_STATE_CONNECT_START: | |
| case EP_STATE_CLEANUP_FAILED: | |
| case EP_STATE_OFLD_FAILED: | |
| case EP_STATE_DISCONN_TIMEDOUT: | |
| ret = 0; | |
| break; | |
| 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_ULP_UPDATE_FAILED: | |
| ret = 1; | |
| break; | |
| case EP_STATE_TCP_RST_RCVD: | |
| ret = 0; | |
| break; | |
| case EP_STATE_CONNECT_FAILED: | |
| if (cnic_dev_10g) | |
| ret = 1; | |
| else | |
| ret = 0; | |
| break; | |
| default: | |
| ret = 0; | |
| } | |
| return ret; | |
| } | |
| /** | |
| * bnx2i_ep_disconnect - executes TCP connection teardown process | |
| * @ep: TCP connection (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_session *session = NULL; | |
| struct iscsi_conn *conn; | |
| struct cnic_dev *cnic; | |
| struct bnx2i_hba *hba; | |
| bnx2i_ep = ep->dd_data; | |
| /* driver should not attempt connection cleanup untill 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; | |
| session = conn->session; | |
| spin_lock_bh(&session->lock); | |
| bnx2i_conn->is_bound = 0; | |
| spin_unlock_bh(&session->lock); | |
| } | |
| hba = bnx2i_ep->hba; | |
| if (bnx2i_ep->state == EP_STATE_IDLE) | |
| goto return_bnx2i_ep; | |
| cnic = hba->cnic; | |
| mutex_lock(&hba->net_dev_lock); | |
| if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) | |
| goto free_resc; | |
| if (bnx2i_ep->hba_age != hba->age) | |
| goto free_resc; | |
| if (!bnx2i_ep_tcp_conn_active(bnx2i_ep)) | |
| goto destory_conn; | |
| bnx2i_ep->state = EP_STATE_DISCONN_START; | |
| init_timer(&bnx2i_ep->ofld_timer); | |
| bnx2i_ep->ofld_timer.expires = 10*HZ + jiffies; | |
| bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; | |
| bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; | |
| add_timer(&bnx2i_ep->ofld_timer); | |
| if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { | |
| int close = 0; | |
| if (session) { | |
| spin_lock_bh(&session->lock); | |
| if (session->state == ISCSI_STATE_LOGGING_OUT) | |
| close = 1; | |
| spin_unlock_bh(&session->lock); | |
| } | |
| if (close) | |
| cnic->cm_close(bnx2i_ep->cm_sk); | |
| else | |
| cnic->cm_abort(bnx2i_ep->cm_sk); | |
| } else | |
| goto free_resc; | |
| /* wait for option-2 conn teardown */ | |
| wait_event_interruptible(bnx2i_ep->ofld_wait, | |
| bnx2i_ep->state != EP_STATE_DISCONN_START); | |
| if (signal_pending(current)) | |
| flush_signals(current); | |
| del_timer_sync(&bnx2i_ep->ofld_timer); | |
| destory_conn: | |
| if (bnx2i_tear_down_conn(hba, bnx2i_ep)) { | |
| mutex_unlock(&hba->net_dev_lock); | |
| return; | |
| } | |
| free_resc: | |
| mutex_unlock(&hba->net_dev_lock); | |
| bnx2i_free_qp_resc(hba, bnx2i_ep); | |
| return_bnx2i_ep: | |
| if (bnx2i_conn) | |
| bnx2i_conn->ep = NULL; | |
| bnx2i_free_ep(ep); | |
| if (!hba->ofld_conns_active) | |
| bnx2i_unreg_dev_all(); | |
| } | |
| /* | |
| * '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 = "Broadcom Offload iSCSI Initiator", | |
| .proc_name = "bnx2i", | |
| .queuecommand = iscsi_queuecommand, | |
| .eh_abort_handler = iscsi_eh_abort, | |
| .eh_device_reset_handler = iscsi_eh_device_reset, | |
| #if 0 /* TODO - investigate */ | |
| .eh_target_reset_handler = iscsi_eh_target_reset, | |
| #endif | |
| .can_queue = 1024, | |
| .max_sectors = 127, | |
| .cmd_per_lun = 32, | |
| .this_id = -1, | |
| .use_clustering = ENABLE_CLUSTERING, | |
| .sg_tablesize = ISCSI_MAX_BDS_PER_CMD, | |
| .shost_attrs = bnx2i_dev_attributes, | |
| }; | |
| struct iscsi_transport bnx2i_iscsi_transport = { | |
| .owner = THIS_MODULE, | |
| .name = "bnx2i", | |
| .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | | |
| CAP_MULTI_R2T | CAP_DATADGST | | |
| CAP_DATA_PATH_OFFLOAD, | |
| .param_mask = ISCSI_MAX_RECV_DLENGTH | | |
| ISCSI_MAX_XMIT_DLENGTH | | |
| ISCSI_HDRDGST_EN | | |
| ISCSI_DATADGST_EN | | |
| ISCSI_INITIAL_R2T_EN | | |
| ISCSI_MAX_R2T | | |
| ISCSI_IMM_DATA_EN | | |
| ISCSI_FIRST_BURST | | |
| ISCSI_MAX_BURST | | |
| ISCSI_PDU_INORDER_EN | | |
| ISCSI_DATASEQ_INORDER_EN | | |
| ISCSI_ERL | | |
| ISCSI_CONN_PORT | | |
| ISCSI_CONN_ADDRESS | | |
| ISCSI_EXP_STATSN | | |
| ISCSI_PERSISTENT_PORT | | |
| ISCSI_PERSISTENT_ADDRESS | | |
| ISCSI_TARGET_NAME | ISCSI_TPGT | | |
| ISCSI_USERNAME | ISCSI_PASSWORD | | |
| ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | | |
| ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | | |
| ISCSI_LU_RESET_TMO | | |
| ISCSI_PING_TMO | ISCSI_RECV_TMO | | |
| ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, | |
| .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME, | |
| .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, | |
| .set_param = iscsi_set_param, | |
| .get_conn_param = bnx2i_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 */ | |
| .ep_connect = bnx2i_ep_connect, | |
| .ep_poll = bnx2i_ep_poll, | |
| .ep_disconnect = bnx2i_ep_disconnect, | |
| /* Error recovery timeout call */ | |
| .session_recovery_timedout = iscsi_session_recovery_timedout, | |
| .cleanup_task = bnx2i_cleanup_task, | |
| }; |