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Message-ID: <1186273141.4806.4.camel@dell>
Date: Sat, 04 Aug 2007 17:19:01 -0700
From: "Michael Chan" <mchan@...adcom.com>
To: "Jeff Garzik" <jeff@...zik.org>
cc: "David Miller" <davem@...emloft.net>, mchristi@...hat.com,
"netdev" <netdev@...r.kernel.org>, open-iscsi@...glegroups.com,
anilgv@...adcom.com, talm@...adcom.com, lusinsky@...adcom.com,
uri@...adcom.com
Subject: [RFC Resend 3/3][BNX2]: Add iSCSI support to BNX2 devices.
diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c
new file mode 100644
index 0000000..0576e1b
--- /dev/null
+++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
@@ -0,0 +1,3718 @@
+/* bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
+
+ *
+ * Copyright (c) 2004, 2005, 2006 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Anil Veerabhadrappa (anilgv@...adcom.com)
+ */
+
+#include "bnx2i.h"
+
+struct scsi_host_template bnx2i_host_template;
+struct iscsi_transport bnx2i_iscsi_transport;
+
+/*
+ * Global endpoint resource info
+ */
+void *bnx2i_ep_pages[MAX_PAGES_PER_CTRL_STRUCT_POOL];
+struct list_head bnx2i_free_ep_list;
+struct list_head bnx2i_unbound_ep;
+u32 bnx2i_num_free_ep;
+u32 bnx2i_max_free_ep;
+spinlock_t bnx2i_resc_lock;
+struct tcp_port_mngt bnx2i_tcp_port_tbl;
+static u16 bnx2i_local_tcp_port = 63000;
+
+
+static struct io_bdt *bnx2i_alloc_bd_table(struct bnx2i_sess *sess,
+ struct bnx2i_cmd *);
+static void bnx2i_free_tcp_port(u16 port);
+static u16 bnx2i_alloc_tcp_port(void);
+
+
+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))
+ retval = -EPERM;
+ return retval;
+}
+
+/*
+ * identifies & marks various bd info for 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)
+{
+ u32 cur_offset = 0;
+ u32 cur_bd_idx = 0;
+ struct iscsi_bd *bd_tbl = cmd->bd_tbl->bd_tbl;
+
+ 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;
+}
+
+/*
+ * identifies & marks various bd info for immediate data,
+ * unsolicited data and first solicited data seq.
+ */
+static void bnx2i_setup_write_cmd_bd_info(struct bnx2i_cmd *cmd)
+{
+ struct bnx2i_conn *conn = NULL;
+ struct bnx2i_sess *sess = NULL;
+ u32 start_bd_offset = 0;
+ u32 start_bd_idx = 0;
+ u32 buffer_offset = 0;
+ u32 seq_len = 0;
+ u32 fbl = 0, mrdsl = 0;
+ u32 cmd_len = cmd->req.total_data_transfer_length;
+
+ if (cmd)
+ conn = cmd->conn;
+ if (conn->sess)
+ sess = conn->sess;
+
+ /* if ImmediateData is turned off & IntialR2T is turned on,
+ * there will be no immediate or unsolicited data, just return.
+ */
+ if (sess->initial_r2t && !sess->imm_data) {
+ return;
+ }
+ fbl = sess->first_burst_len;
+ mrdsl = conn->max_data_seg_len_xmit;
+
+ /* Immediate data */
+ if (sess->imm_data) {
+ seq_len = min(mrdsl, fbl);
+ seq_len = min(cmd_len, seq_len);
+ buffer_offset += seq_len;
+ }
+ if (seq_len == cmd_len) {
+ return;
+ }
+
+ if (!sess->initial_r2t) {
+ if (seq_len >= fbl)
+ goto r2t_data;
+ seq_len = min(fbl, cmd_len) - seq_len;
+ 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 += seq_len;
+ }
+r2t_data:
+ if (buffer_offset != cmd_len) {
+ bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
+ &start_bd_offset, &start_bd_idx);
+ if ((start_bd_offset > fbl) ||
+ (start_bd_idx > cmd->scsi_cmd->use_sg)) {
+ int i = 0;
+
+ printk(KERN_ALERT "bnx2i- error, buf offset 0x%x "
+ "bd_valid %d use_sg %d\n",
+ buffer_offset, cmd->bd_tbl->bd_valid,
+ cmd->scsi_cmd->use_sg);
+ for (i = 0; i < cmd->bd_tbl->bd_valid; i++)
+ printk(KERN_ALERT "bnx2i err, bd[%d]: len %x\n",
+ i, cmd->bd_tbl->bd_tbl[i].\
+ buffer_length);
+ }
+ cmd->req.sd_buffer_offset = start_bd_offset;
+ cmd->req.sd_start_bd_index = start_bd_idx;
+ }
+}
+
+
+/*
+ */
+static int bnx2i_split_bd(struct bnx2i_cmd *cmd, u64 addr, int sg_len,
+ int bd_index)
+{
+ struct iscsi_bd *bd = cmd->bd_tbl->bd_tbl;
+ int frag_size = 0, sg_frags = 0;
+
+ while (sg_len) {
+ if (sg_len >= BD_SPLIT_SIZE)
+ frag_size = BD_SPLIT_SIZE;
+ else
+ frag_size = sg_len;
+ bd[bd_index + sg_frags].buffer_addr_lo = (u32) addr;
+ bd[bd_index + sg_frags].buffer_addr_hi = addr >> 32;
+ bd[bd_index + sg_frags].buffer_length = frag_size;
+ bd[bd_index + sg_frags].flags = 0;
+ if ((bd_index + sg_frags) == 0)
+ bd[0].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
+ addr += (u64) frag_size;
+ sg_frags++;
+ sg_len -= frag_size;
+ }
+ return sg_frags;
+}
+
+
+/*
+ * map single buffer
+ */
+static int bnx2i_map_single_buf(struct bnx2i_hba *hba,
+ struct bnx2i_cmd *cmd)
+{
+ struct scsi_cmnd *sc = cmd->scsi_cmd;
+ struct iscsi_bd *bd = cmd->bd_tbl->bd_tbl;
+ int byte_count = 0;
+ int bd_count = 0;
+ u64 addr;
+
+ byte_count = sc->request_bufflen;
+ sc->SCp.dma_handle =
+ pci_map_single(hba->pci_dev, sc->request_buffer,
+ sc->request_bufflen, sc->sc_data_direction);
+ addr = sc->SCp.dma_handle;
+
+ if (byte_count > MAX_BD_LENGTH) {
+ bd_count = bnx2i_split_bd(cmd, addr, byte_count, 0);
+ } else {
+ bd_count = 1;
+ bd[0].buffer_addr_lo = addr & 0xffffffff;
+ bd[0].buffer_addr_hi = addr >> 32;
+ bd[0].buffer_length = sc->request_bufflen;
+ bd[0].flags = ISCSI_BD_FIRST_IN_BD_CHAIN |
+ ISCSI_BD_LAST_IN_BD_CHAIN;
+ }
+ bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
+
+ return bd_count;
+}
+
+
+/*
+ * map SG list
+ */
+static int bnx2i_map_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
+{
+ struct scsi_cmnd *sc = cmd->scsi_cmd;
+ struct iscsi_bd *bd = cmd->bd_tbl->bd_tbl;
+ struct scatterlist *sg;
+ int byte_count = 0;
+ int sg_frags = 0;
+ int bd_count = 0;
+ int sg_count = 0;
+ int sg_len;
+ u64 addr;
+ int i;
+
+ sg = (struct scatterlist *) sc->request_buffer;
+
+ sg_count = pci_map_sg(hba->pci_dev, sg, sc->use_sg,
+ sc->sc_data_direction);
+
+ for (i = 0; i < sg_count; i++) {
+ sg_len = sg_dma_len(sg);
+ addr = sg_dma_address(sg);
+ if (sg_len > MAX_BD_LENGTH) {
+ sg_frags = bnx2i_split_bd(cmd, addr, sg_len,
+ bd_count);
+ } else {
+ sg_frags = 1;
+ 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;
+ sg++;
+ bd_count += sg_frags;
+ }
+ bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
+
+ BUG_ON(byte_count != sc->request_bufflen);
+ return bd_count;
+}
+
+/*
+ * creates BD list table for the command
+ */
+static int bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
+{
+ struct bnx2i_hba *hba = cmd->conn->sess->hba;
+ struct scsi_cmnd *sc = cmd->scsi_cmd;
+ int bd_count = 0;
+
+ if (sc->use_sg)
+ bd_count = bnx2i_map_sg(hba, cmd);
+ else if (sc->request_bufflen)
+ bd_count = bnx2i_map_single_buf(hba, cmd);
+ else {
+ struct iscsi_bd *bd = cmd->bd_tbl->bd_tbl;
+ bd_count = 0;
+ bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
+ bd[0].buffer_length = bd[0].flags = 0;
+ }
+ cmd->bd_tbl->bd_valid = bd_count;
+ return 0;
+}
+
+
+/*
+ * create BD list table for the command
+ */
+int bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
+{
+ struct bnx2i_hba *hba = cmd->conn->sess->hba;
+ struct scsi_cmnd *sc = cmd->scsi_cmd;
+ struct pci_dev *pdev = hba->pci_dev;
+ struct scatterlist *sg;
+
+ if (cmd->bd_tbl->bd_valid && sc) {
+ if (sc->use_sg) {
+ sg = (struct scatterlist *) sc->request_buffer;
+ pci_unmap_sg(pdev, sg, sc->use_sg,
+ sc->sc_data_direction);
+ } else {
+ pci_unmap_single(pdev, sc->SCp.dma_handle,
+ sc->request_bufflen,
+ sc->sc_data_direction);
+ }
+ cmd->bd_tbl->bd_valid = 0;
+ }
+ return 0;
+}
+
+
+
+static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
+{
+ memset(&cmd->req, 0x00, sizeof(cmd->req));
+ cmd->req.op_code = ISCSI_OPCODE_SCSI_CMD;
+ cmd->req.bd_list_addr_lo = (u32) cmd->bd_tbl->bd_tbl_dma;
+ cmd->req.bd_list_addr_hi =
+ (u32) ((u64) cmd->bd_tbl->bd_tbl_dma >> 32);
+
+}
+
+
+/*
+ * update iscsi cid table entry with connection pointer
+ */
+static void bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_conn *conn,
+ u32 iscsi_cid)
+{
+ struct bnx2i_hba *hba = NULL;
+
+ if (!conn || !conn->sess)
+ return;
+
+ hba = conn->sess->hba;
+
+ if (hba->cid_que.conn_cid_tbl[iscsi_cid])
+ printk(KERN_ERR "bnx2i: conn bind - entry #%d not free\n",
+ iscsi_cid);
+ hba->cid_que.conn_cid_tbl[iscsi_cid] = conn;
+}
+
+
+/*
+ * maps an iscsi cid to corresponding conn ptr
+ */
+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]);
+}
+
+
+
+/*
+ * allocates a iscsi_cid from free pool
+ */
+static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
+{
+ int idx = 0;
+
+ if (!hba->cid_que.cid_free_cnt)
+ return (ISCSI_RESERVED_TAG);
+
+ 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];
+}
+
+
+/*
+ * return iscsi_cid back to free pool
+ */
+static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
+{
+ int idx = 0;
+
+ if (iscsi_cid == (u16)ISCSI_RESERVED_TAG)
+ 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;
+ }
+}
+
+
+
+/*
+ * setup iscsi_cid queue, 'iscsi_cid' value ranges from 0 to (MAX_CONNS -1)
+ */
+static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
+{
+ int mem_size;
+ int i = 0;
+
+ mem_size = hba->max_active_conns * sizeof(u16);
+ 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 =
+ (struct bnx2i_conn **)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;
+ }
+
+ 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;
+}
+
+
+/*
+ * Releases resources held by free 'iscsi_cid' queue
+ */
+static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
+{
+ if (hba->cid_que.cid_que_base) {
+ kfree(hba->cid_que.cid_que_base);
+ hba->cid_que.cid_que_base = NULL;
+ }
+
+ if (hba->cid_que.conn_cid_tbl) {
+ kfree(hba->cid_que.conn_cid_tbl);
+ hba->cid_que.conn_cid_tbl = NULL;
+ }
+}
+
+
+/*
+ * routine allocates a free endpoint structure from the global pool
+ */
+struct bnx2i_endpoint *bnx2i_alloc_ep(void)
+{
+ struct bnx2i_endpoint *endpoint = NULL;
+ struct list_head *listp;
+ u16 tcp_port;
+
+ spin_lock_bh(&bnx2i_resc_lock);
+
+ tcp_port = bnx2i_alloc_tcp_port();
+ if (!tcp_port) {
+ spin_unlock_bh(&bnx2i_resc_lock);
+ return NULL;
+ }
+ if (list_empty(&bnx2i_free_ep_list)) {
+ spin_unlock_bh(&bnx2i_resc_lock);
+ printk(KERN_ERR "alloc_ep: unable to alloc ep struct\n");
+ return endpoint;
+ }
+ listp = (struct list_head *)bnx2i_free_ep_list.next;
+ list_del_init(listp);
+ bnx2i_num_free_ep--;
+
+ endpoint = (struct bnx2i_endpoint *)listp;
+ endpoint->in_use = 1;
+ endpoint->tcp_port = tcp_port;
+ init_waitqueue_head(&endpoint->ofld_wait);
+
+ spin_unlock_bh(&bnx2i_resc_lock);
+ return endpoint;
+}
+
+
+/*
+ * free endpoint structure to global free pool
+ */
+void bnx2i_free_ep(struct bnx2i_endpoint *endpoint)
+{
+ if (!endpoint)
+ return;
+
+ spin_lock_bh(&bnx2i_resc_lock);
+ endpoint->state = EP_STATE_IDLE;
+ endpoint->in_use = 0;
+ bnx2i_free_iscsi_cid(endpoint->hba, endpoint->ep_iscsi_cid);
+ if (endpoint->conn) {
+ endpoint->conn->ep = NULL;
+ endpoint->conn = NULL;
+ }
+ endpoint->sess = NULL;
+
+ if (endpoint->tcp_port) {
+ bnx2i_free_tcp_port(endpoint->tcp_port);
+ }
+ endpoint->hba = NULL;
+ list_add_tail(&endpoint->link, &bnx2i_free_ep_list);
+ bnx2i_num_free_ep++;
+ spin_unlock_bh(&bnx2i_resc_lock);
+}
+
+
+/*
+ * allocates free pool of endpoint structurres, endpoint structures
+ * are used to store QP related control and PT info
+ */
+int bnx2i_alloc_ep_pool(void)
+{
+ struct bnx2i_endpoint *endpoint = NULL;
+ int index = 0, count = 0;
+ int ret_val = 1;
+ int total_endpoints = 0;
+ int page_count = 0;
+ int num_endpoints_per_page = 0;
+ void *mem_ptr = NULL;
+
+ spin_lock_init(&bnx2i_resc_lock);
+ INIT_LIST_HEAD(&bnx2i_free_ep_list);
+ INIT_LIST_HEAD(&bnx2i_unbound_ep);
+
+ for (index = 0; index < MAX_PAGES_PER_CTRL_STRUCT_POOL; index++) {
+ bnx2i_ep_pages[index] = NULL;
+ }
+
+ num_endpoints_per_page =
+ PAGE_SIZE / sizeof(struct bnx2i_endpoint);
+
+ total_endpoints = ISCSI_MAX_CONNS_PER_HBA;
+ if (total_endpoints >
+ (num_endpoints_per_page * MAX_PAGES_PER_CTRL_STRUCT_POOL)) {
+ total_endpoints = (num_endpoints_per_page *
+ MAX_PAGES_PER_CTRL_STRUCT_POOL);
+ }
+
+ bnx2i_num_free_ep = 0;
+ for (index = 0; index < total_endpoints;) {
+ mem_ptr = (void *)kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (mem_ptr == NULL) {
+ printk(KERN_ERR "ep_pool: mem alloc failed\n");
+ break;
+ }
+ bnx2i_ep_pages[page_count++] = (void *)mem_ptr;
+
+ memset(mem_ptr, 0, PAGE_SIZE);
+
+ endpoint = (struct bnx2i_endpoint *)mem_ptr;
+ for (count = 0; count < num_endpoints_per_page; count++) {
+ endpoint->in_use = 0;
+ list_add_tail(&endpoint->link, &bnx2i_free_ep_list);
+ endpoint++;
+ }
+
+ bnx2i_num_free_ep += num_endpoints_per_page;
+ index += num_endpoints_per_page;
+ }
+ if (bnx2i_num_free_ep == 0)
+ ret_val = 0;
+ bnx2i_max_free_ep = bnx2i_num_free_ep;
+
+ return(ret_val);
+}
+
+
+/*
+ * Free memory resources held by global endpoint pool
+ */
+void bnx2i_release_ep_pool(void)
+{
+ int index = 0;
+ void *mem_ptr = NULL;
+
+ for (index = 0; index < MAX_PAGES_PER_CTRL_STRUCT_POOL; index++) {
+ mem_ptr = bnx2i_ep_pages[index];
+ if (mem_ptr) {
+ kfree((void *) mem_ptr);
+ break;
+ }
+ bnx2i_ep_pages[index] = NULL;
+ }
+ bnx2i_num_free_ep = 0;
+ return;
+}
+
+
+/*
+ * iSCSI Session ITT queue management code
+ */
+static u32 bnx2i_alloc_itt(struct bnx2i_sess *sess, struct bnx2i_cmd *cmd)
+{
+ u32 itt_val = ITT_INVALID_SIGNATURE;
+
+ if (sess->itt_q.itt_q_count) {
+ itt_val = sess->itt_q.itt_que[sess->itt_q.itt_q_cons_idx++];
+ sess->itt_q.itt_q_cons_idx %= sess->itt_q.itt_q_max_idx;
+ sess->itt_q.itt_cmd[itt_val] = cmd;
+ sess->itt_q.itt_q_count--;
+ }
+ return itt_val;
+}
+
+
+static void bnx2i_free_itt(struct bnx2i_sess *sess, struct bnx2i_cmd *cmd)
+{
+ if (cmd->req.itt == ITT_INVALID_SIGNATURE) {
+ printk(KERN_ALERT "free_itt: RSVD ITT - sess 0x%p\n", sess);
+ }
+ sess->itt_q.itt_que[sess->itt_q.itt_q_prod_idx++] = cmd->req.itt;
+ sess->itt_q.itt_q_prod_idx %= sess->itt_q.itt_q_max_idx;
+ sess->itt_q.itt_cmd[cmd->req.itt] = NULL;
+ sess->itt_q.itt_q_count++;
+ cmd->req.itt = ITT_INVALID_SIGNATURE;
+}
+
+
+/*
+ * setup ITT queue during iSCSI session creation. ITT queue is a
+ * circular array of ITTs [range 0 - (SQ SIZE - 1)] managed by
+ * producer and consumer index
+ */
+static int bnx2i_setup_free_itt_queue(struct bnx2i_sess *sess)
+{
+ u16 itt_q_size = (u16)sess->sq_size;
+ u32 itt_value = 0;
+ int unit_size = sizeof(u16);
+ int mem_size = PAGE_SIZE;
+
+ if ((itt_q_size * unit_size) > mem_size)
+ mem_size = (itt_q_size * unit_size);
+
+ mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
+ sess->itt_q.itt_que_base = kmalloc(mem_size, GFP_KERNEL);
+ if (!sess->itt_q.itt_que_base) {
+ return -ENOMEM;
+ }
+
+ mem_size = (itt_q_size * sizeof(struct bnx2i_cmd *));
+ mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
+ sess->itt_q.itt_cmd =
+ (struct bnx2i_cmd **) kmalloc(mem_size, GFP_KERNEL);
+ if (!sess->itt_q.itt_cmd) {
+ kfree(sess->itt_q.itt_que_base);
+ sess->itt_q.itt_que_base = NULL;
+ return -1;
+ }
+ memset(sess->itt_q.itt_cmd, 0x00, mem_size);
+
+ sess->itt_q.itt_que = (u32 *)sess->itt_q.itt_que_base;
+ sess->itt_q.itt_q_prod_idx = 0;
+ sess->itt_q.itt_q_cons_idx = 0;
+ sess->itt_q.itt_q_max_idx = itt_q_size;
+ sess->itt_q.itt_q_count = itt_q_size;
+
+ itt_value = 0;
+ while (itt_value < itt_q_size) {
+ sess->itt_q.itt_cmd[itt_value] = (struct bnx2i_cmd *)NULL;
+ sess->itt_q.itt_que[sess->itt_q.itt_q_prod_idx++] =
+ itt_value++;
+ if (sess->itt_q.itt_q_prod_idx >= sess->itt_q.itt_q_max_idx) {
+ sess->itt_q.itt_q_prod_idx = 0;
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ * free resources held by free ITT queue
+ */
+static void bnx2i_release_free_itt_queue(struct bnx2i_sess *sess)
+{
+ sess->itt_q.itt_q_count = 0;
+ if (sess->itt_q.itt_que_base) {
+ kfree (sess->itt_q.itt_que_base);
+ sess->itt_q.itt_que_base = NULL;
+ }
+
+ if (sess->itt_q.itt_cmd) {
+ kfree (sess->itt_q.itt_cmd);
+ sess->itt_q.itt_cmd = NULL;
+ }
+ return;
+}
+
+
+/*
+ * allocates a command structures from free poll
+ */
+struct bnx2i_cmd *bnx2i_alloc_cmd(struct bnx2i_sess *sess)
+{
+ struct bnx2i_cmd *cmd = NULL;
+ struct list_head *listp;
+
+ if (unlikely(!sess || (sess->num_free_cmds == 0))) {
+ return cmd;
+ }
+
+ listp = (struct list_head *) sess->free_cmds.next;
+ list_del_init(listp);
+ sess->num_free_cmds--;
+ cmd = (struct bnx2i_cmd *)listp;
+ cmd->in_use = 1;
+ cmd->scsi_status_rcvd = cmd->resi_len = 0;
+ cmd->scsi_uflow = cmd->scsi_oflow = 0;
+
+ bnx2i_setup_cmd_wqe_template(cmd);
+
+ cmd->req.itt = bnx2i_alloc_itt(sess, cmd);
+
+ return cmd;
+}
+
+
+/*
+ * return command structure and ITT back to free pool.
+ */
+void bnx2i_free_cmd(struct bnx2i_sess *sess, struct bnx2i_cmd *cmd)
+{
+ if (!sess || !cmd)
+ return;
+
+ cmd->in_use = 0;
+ bnx2i_free_itt(sess, cmd);
+ list_add_tail(&cmd->link, &sess->free_cmds);
+ sess->num_free_cmds++;
+}
+
+
+/*
+ * Allocate command structure pool for a given iSCSI session
+ */
+int bnx2i_alloc_cmd_pool(struct bnx2i_sess *sess)
+{
+ struct bnx2i_cmd *cmdp = NULL;
+ int index = 0, count = 0;
+ int ret_val = 0;
+ int total_cmds = 0;
+ int num_cmds = 0;
+ int page_count = 0;
+ int num_cmds_per_page = 0;
+ void *mem_ptr = NULL;
+
+ if (!sess)
+ return -EINVAL;
+
+ INIT_LIST_HEAD(&sess->free_cmds);
+ for (index = 0; index < MAX_PAGES_PER_CTRL_STRUCT_POOL; index++) {
+ sess->cmd_pages[index] = NULL;
+ }
+
+ num_cmds_per_page = PAGE_SIZE / sizeof(struct bnx2i_cmd);
+ total_cmds = sess->hba->scsi_template->can_queue + 1;
+ if (total_cmds >
+ (num_cmds_per_page * MAX_PAGES_PER_CTRL_STRUCT_POOL)) {
+ total_cmds = num_cmds_per_page *
+ MAX_PAGES_PER_CTRL_STRUCT_POOL;
+ }
+
+ for (index = 0; index < total_cmds;) {
+ mem_ptr = (void *) kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (mem_ptr == NULL) {
+ break;
+ }
+ sess->cmd_pages[page_count++] = (void *)mem_ptr;
+
+ num_cmds = num_cmds_per_page;
+ if ((total_cmds - index) < num_cmds_per_page)
+ num_cmds = (total_cmds - index);
+
+ memset(mem_ptr, 0, PAGE_SIZE);
+ cmdp = (struct bnx2i_cmd *) mem_ptr;
+ for (count = 0; count < num_cmds; count++) {
+ cmdp->in_use = 0;
+ cmdp->req.itt = ITT_INVALID_SIGNATURE;
+
+ /* Allocate BD table */
+ cmdp->bd_tbl = bnx2i_alloc_bd_table(sess, cmdp);
+ if (!cmdp->bd_tbl) {
+ /* should never fail, as it's guaranteed to have
+ * (ISCSI_MAX_CMDS_PER_SESS + 1) BD tables
+ * allocated before calling this function.
+ */
+ printk(KERN_ERR "no BD table cmd %p\n", cmdp);
+ goto bd_table_failed;
+ }
+ list_add_tail(&cmdp->link, &sess->free_cmds);
+ cmdp++;
+ }
+
+ sess->num_free_cmds += num_cmds;
+ index += num_cmds;
+ }
+ sess->allocated_cmds = sess->num_free_cmds;
+
+ if (sess->num_free_cmds == 0)
+ ret_val = -ENOMEM;
+ return(ret_val);
+
+bd_table_failed:
+ return(-ENOMEM);
+}
+
+
+/*
+ * Release memory held by command struct pool.
+ */
+void bnx2i_free_cmd_pool(struct bnx2i_sess *sess)
+{
+ int index = 0;
+ void *mem_ptr = NULL;
+
+ if (unlikely(!sess))
+ return;
+
+ if (sess->num_free_cmds != sess->allocated_cmds) {
+ /*
+ * WARN: either there is some command struct leak or
+ * still some SCSI commands are pending.
+ * TODO: post mortem required...
+ */
+ }
+ for (index = 0; index < MAX_PAGES_PER_CTRL_STRUCT_POOL; index++) {
+ mem_ptr = sess->cmd_pages[index];
+ if (mem_ptr) {
+ kfree((void *) mem_ptr);
+ break;
+ }
+ sess->cmd_pages[index] = NULL;
+ }
+ sess->num_free_cmds = sess->allocated_cmds = 0;
+ return;
+}
+
+
+/*
+ * Allocate a BD table
+ */
+static struct io_bdt *bnx2i_alloc_bd_table(struct bnx2i_sess *sess,
+ struct bnx2i_cmd *cmd)
+{
+ struct io_bdt *bd_tbl = NULL;
+
+ if (list_empty(&sess->bd_tbl_list)) {
+ return NULL;
+ }
+ bd_tbl = (struct io_bdt *)sess->bd_tbl_list.next;
+ list_del(&bd_tbl->link);
+ list_add_tail(&bd_tbl->link, &sess->bd_tbl_active);
+ bd_tbl->bd_valid = 0;
+ if (!bd_tbl->cmdp) {
+ bd_tbl->cmdp = cmd;
+ }
+ return bd_tbl;
+}
+
+
+/*
+ * Free up memory pages allocated held by BD resources
+ */
+static void bnx2i_free_all_bdt_resc_pages(struct bnx2i_sess *sess)
+{
+ int i = 0;
+ struct bd_resc_page *resc_page = NULL;
+
+ spin_lock_bh(&sess->lock);
+ while (!list_empty(&sess->bd_resc_page)) {
+ resc_page = (struct bd_resc_page *)sess->bd_resc_page.prev;
+ list_del(sess->bd_resc_page.prev);
+ for(i = 0; i < resc_page->num_valid; i++) {
+ kfree(resc_page->page[i]);
+ }
+ kfree(resc_page);
+ }
+ spin_unlock_bh(&sess->lock);
+}
+
+
+
+/*
+ * allocated 4K page to track BD table memory
+ */
+struct bd_resc_page *bnx2i_alloc_bdt_resc_page(struct bnx2i_sess *sess)
+{
+ void *mem_ptr;
+ struct bd_resc_page *resc_page = NULL;
+
+ mem_ptr = (void *) kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!mem_ptr)
+ return NULL;
+
+ resc_page = (struct bd_resc_page *) mem_ptr;
+ list_add_tail(&resc_page->link, &sess->bd_resc_page);
+ resc_page->max_ptrs = (PAGE_SIZE -
+ (u32)&((struct bd_resc_page *) 0)->page[0]) / sizeof(void *);
+ resc_page->num_valid = 0;
+
+ return resc_page;
+}
+
+
+/*
+ * link newly allocated memory page to the list
+ */
+int bnx2i_add_bdt_resc_page(struct bnx2i_sess *sess, void *bd_page)
+{
+ struct bd_resc_page *resc_page = NULL;
+
+#define is_resc_page_full(_resc_pg) (_resc_pg->num_valid == _resc_pg->max_ptrs)
+#define active_resc_page(_resc_list) \
+ (list_empty(_resc_list) ? NULL : (_resc_list)->prev)
+ if (list_empty(&sess->bd_resc_page)) {
+ resc_page = bnx2i_alloc_bdt_resc_page(sess);
+ } else {
+ resc_page = (struct bd_resc_page *)
+ active_resc_page(&sess->bd_resc_page);
+ }
+
+ if (!resc_page)
+ return -ENOMEM;
+
+ resc_page->page[resc_page->num_valid++] = bd_page;
+ if (is_resc_page_full(resc_page)) {
+ resc_page = bnx2i_alloc_bdt_resc_page(sess);
+ }
+ return 0;
+}
+
+
+/*
+ * Allocate BD table pool, DMA'able memory for a given session.
+ */
+int bnx2i_alloc_bd_table_pool(struct bnx2i_sess *sess)
+{
+ int index = 0, count = 0;
+ int ret_val = 0;
+ int num_elem_per_page;
+ struct io_bdt *bdt_info;
+ char *mem_ptr = NULL;
+ u32 bd_tbl_size = 0;
+ u32 mem_size = 0;
+ int total_bd_tbl = 0;
+
+ INIT_LIST_HEAD(&sess->bd_resc_page);
+ INIT_LIST_HEAD(&sess->bd_tbl_list);
+ INIT_LIST_HEAD(&sess->bd_tbl_active);
+ total_bd_tbl = sess->hba->scsi_template->can_queue + 1;
+ mem_size = total_bd_tbl * sizeof(struct io_bdt);
+ num_elem_per_page = PAGE_SIZE / sizeof(struct io_bdt);
+ for (index = 0; index < total_bd_tbl; index += num_elem_per_page) {
+ if (((total_bd_tbl - index) * sizeof(struct io_bdt))
+ >= PAGE_SIZE) {
+ mem_size = PAGE_SIZE;
+ num_elem_per_page = PAGE_SIZE / sizeof(struct io_bdt);
+ } else {
+ mem_size =
+ (total_bd_tbl - index) * sizeof(struct io_bdt);
+ num_elem_per_page = (total_bd_tbl - index);
+ }
+ mem_ptr = (void *)kmalloc(mem_size, GFP_KERNEL);
+ if (mem_ptr == NULL) {
+ printk(KERN_ERR "alloc_bd_tbl: mem alloc failed\n");
+ ret_val = -ENOMEM;
+ goto resc_alloc_failed;
+ }
+ bnx2i_add_bdt_resc_page(sess, mem_ptr);
+
+ memset(mem_ptr, 0, mem_size);
+ bdt_info = (struct io_bdt *)mem_ptr;
+ for (count = 0; count < num_elem_per_page; count++) {
+ list_add_tail(&bdt_info->link, &sess->bd_tbl_list);
+ bdt_info++;
+ }
+ }
+
+ bd_tbl_size = ISCSI_MAX_BDS_PER_CMD * sizeof(struct iscsi_bd);
+ bdt_info = (struct io_bdt *)sess->bd_tbl_list.next;
+ while (bdt_info && (bdt_info != (struct io_bdt *)&sess->bd_tbl_list)) {
+ mem_ptr = (char *)pci_alloc_consistent(sess->hba->pci_dev,
+ bd_tbl_size,
+ &bdt_info->bd_tbl_dma);
+ if (!mem_ptr) {
+ printk(KERN_ERR "bd_tbl: DMA mem alloc failed\n");
+ ret_val = -ENOMEM;
+ goto dma_alloc_failed;
+ }
+ bdt_info->bd_tbl = (struct iscsi_bd *)mem_ptr;
+ bdt_info->max_bd_cnt = ISCSI_MAX_BDS_PER_CMD;
+ bdt_info->bd_valid = 0;
+ bdt_info->cmdp = NULL;
+
+ bdt_info = (struct io_bdt *)bdt_info->link.next;
+ }
+ return(ret_val);
+
+resc_alloc_failed:
+dma_alloc_failed:
+ return(ret_val);
+}
+
+
+/*
+ * releases BD table pool memory
+ */
+void bnx2i_free_bd_table_pool(struct bnx2i_sess *sess)
+{
+ struct list_head *list;
+ struct io_bdt *bdt_info;
+ u32 bd_tbl_size = 0;
+
+ bd_tbl_size = ISCSI_MAX_BDS_PER_CMD * sizeof(struct iscsi_bd);
+ list_for_each(list, &sess->bd_tbl_list) {
+ bdt_info = list_entry(list, struct io_bdt, link);
+ pci_free_consistent(sess->hba->pci_dev, bd_tbl_size,
+ (void *)bdt_info->bd_tbl,
+ bdt_info->bd_tbl_dma);
+ bdt_info->bd_tbl = NULL;
+ if (bdt_info->cmdp) {
+ bdt_info->cmdp->bd_tbl = NULL;
+ bdt_info->cmdp = NULL;
+ }
+ }
+
+ list_for_each(list, &sess->bd_tbl_active) {
+ bdt_info = list_entry(list, struct io_bdt, link);
+ pci_free_consistent(sess->hba->pci_dev, bd_tbl_size,
+ (void *)bdt_info->bd_tbl,
+ bdt_info->bd_tbl_dma);
+ bdt_info->bd_tbl = NULL;
+ if (bdt_info->cmdp) {
+ bdt_info->cmdp->bd_tbl = NULL;
+ bdt_info->cmdp = NULL;
+ }
+ }
+}
+
+
+/*
+ * 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 = NULL;
+ if (hba->cnic_dev_type == CNIC_10GIG_GEN1)
+ return rc;
+
+ hba->mp_bd_tbl = pci_alloc_consistent(hba->pci_dev,
+ PAGE_SIZE, &hba->mp_bd_dma);
+ if (!hba->mp_bd_tbl) {
+ printk(KERN_ERR "unable to allocate Middle Path BDT\n");
+ rc = -1;
+ goto out;
+ }
+
+ hba->dummy_buffer =
+ pci_alloc_consistent(hba->pci_dev,
+ PAGE_SIZE, &hba->dummy_buf_dma);
+ if (!hba->dummy_buffer) {
+ printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
+ pci_free_consistent(hba->pci_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;
+}
+
+
+/*
+ * free MP dummy buffer and associated BD table
+ */
+static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
+{
+
+ if (hba->mp_bd_tbl) {
+ pci_free_consistent(hba->pci_dev, PAGE_SIZE,
+ hba->mp_bd_tbl, hba->mp_bd_dma);
+ hba->mp_bd_tbl = NULL;
+ }
+ if (hba->dummy_buffer) {
+ pci_free_consistent(hba->pci_dev, PAGE_SIZE,
+ hba->dummy_buffer, hba->dummy_buf_dma);
+ hba->dummy_buffer = NULL;
+ }
+ return;
+}
+
+
+static u16 bnx2i_alloc_tcp_port()
+{
+ return bnx2i_local_tcp_port++;
+}
+
+
+/*
+ * Function : bnx2i_free_tcp_port
+ * Description:
+ */
+static void bnx2i_free_tcp_port(u16 port)
+{
+ if (!bnx2i_tcp_port_tbl.free_q)
+ return;
+
+ bnx2i_tcp_port_tbl.free_q[bnx2i_tcp_port_tbl.prod_idx] = port;
+ bnx2i_tcp_port_tbl.prod_idx++;
+ bnx2i_tcp_port_tbl.prod_idx %= bnx2i_tcp_port_tbl.max_idx;
+ bnx2i_tcp_port_tbl.num_free_ports++;
+}
+
+void bnx2i_tcp_port_new_entry(u16 tcp_port)
+{
+ u32 idx = bnx2i_tcp_port_tbl.prod_idx;
+
+ spin_lock(&bnx2i_resc_lock);
+ bnx2i_tcp_port_tbl.free_q[idx] = (u16)tcp_port;
+ bnx2i_tcp_port_tbl.prod_idx++;
+ bnx2i_tcp_port_tbl.prod_idx %= bnx2i_tcp_port_tbl.max_idx;
+ bnx2i_tcp_port_tbl.num_free_ports++;
+ bnx2i_tcp_port_tbl.num_required--;
+ spin_unlock(&bnx2i_resc_lock);
+}
+
+/*
+ * Function : bnx2i_init_tcp_port_mngr
+ * Description:
+ */
+void bnx2i_init_tcp_port_mngr(void)
+{
+ int mem_size = 0;
+
+ bnx2i_tcp_port_tbl.num_free_ports = 0;
+ bnx2i_tcp_port_tbl.prod_idx = 0;
+ bnx2i_tcp_port_tbl.cons_idx = 0;
+ bnx2i_tcp_port_tbl.max_idx = 0;
+ bnx2i_tcp_port_tbl.num_required = 0;
+
+#define BNX2I_MAX_TCP_PORTS 1024
+
+ bnx2i_tcp_port_tbl.port_tbl_size = BNX2I_MAX_TCP_PORTS;
+
+ mem_size = sizeof(u16) * bnx2i_tcp_port_tbl.port_tbl_size;
+ if (bnx2i_tcp_port_tbl.port_tbl_size) {
+ bnx2i_tcp_port_tbl.free_q =
+ (u16 *)kmalloc(mem_size, GFP_KERNEL);
+
+ if (bnx2i_tcp_port_tbl.free_q)
+ bnx2i_tcp_port_tbl.max_idx =
+ bnx2i_tcp_port_tbl.port_tbl_size;
+ }
+}
+
+
+/*
+ * Function : bnx2i_cleanup_tcp_port_mngr
+ * Description:
+ */
+void bnx2i_cleanup_tcp_port_mngr(void)
+{
+ if (bnx2i_tcp_port_tbl.free_q) {
+ kfree(bnx2i_tcp_port_tbl.free_q);
+ bnx2i_tcp_port_tbl.free_q = NULL;
+ }
+ bnx2i_tcp_port_tbl.num_free_ports = 0;
+}
+
+
+
+/*
+ * interface was brought down by the user, fail all iSCSI sessions
+ * on this adapter,
+ */
+void bnx2i_start_iscsi_hba_shutdown(struct bnx2i_hba *hba)
+{
+ struct list_head *list = NULL;
+ struct list_head *tmp = NULL;
+ struct bnx2i_sess *sess;
+
+ list_for_each_safe(list, tmp, &hba->active_sess) {
+ sess = (struct bnx2i_sess *)list;
+ bnx2i_do_iscsi_sess_recovery(sess, DID_NO_CONNECT);
+ }
+}
+
+
+/*
+ * IP address change indication, fail all iSCSI sessions on this adapter
+ */
+void bnx2i_iscsi_handle_ip_event(struct bnx2i_hba *hba)
+{
+ struct list_head *list = NULL;
+ struct list_head *tmp = NULL;
+ struct bnx2i_sess *sess;
+
+ spin_lock(&hba->lock);
+ list_for_each_safe(list, tmp, &hba->active_sess) {
+ sess = (struct bnx2i_sess *)list;
+ spin_unlock(&hba->lock);
+ bnx2i_do_iscsi_sess_recovery(sess, DID_RESET);
+ spin_lock(&hba->lock);
+ }
+ spin_unlock(&hba->lock);
+}
+
+
+
+static void
+conn_err_recovery_task(struct work_struct *work)
+{
+ struct bnx2i_hba *hba = container_of(work, struct bnx2i_hba,
+ err_rec_task);
+ struct bnx2i_sess *sess;
+ int cons_idx = hba->sess_recov_cons_idx;
+
+ while (hba->sess_recov_prod_idx != cons_idx) {
+ sess = hba->sess_recov_list[cons_idx];
+ bnx2i_do_iscsi_sess_recovery(sess, DID_RESET);
+ if (cons_idx == hba->sess_recov_max_idx)
+ cons_idx = 0;
+ else
+ cons_idx++;
+ }
+ hba->sess_recov_cons_idx = cons_idx;
+}
+
+
+
+
+/*
+ * allocate memory buffer to extract conn context
+ */
+static void bnx2i_init_ctx_dump_mem(struct bnx2i_hba *hba)
+{
+ if (hba->ctx_addr)
+ return;
+
+ hba->ictx_poll_mode = 0;
+ hba->ctx_size = 0;
+ hba->ctx_read_cnt = 0xffffffff;
+ hba->ctx_addr = pci_alloc_consistent(hba->pci_dev,
+ BNX2I_CONN_CTX_BUF_SIZE,
+ &hba->ctx_dma_hndl);
+ if (!hba->ctx_addr)
+ return;
+ hba->ctx_size = BNX2I_CONN_CTX_BUF_SIZE;
+}
+
+
+/*
+ * free context memory buffer
+ */
+static void bnx2i_free_ctx_dump_mem(struct bnx2i_hba *hba)
+{
+ if (!hba->ctx_addr || (hba->ctx_size == 0))
+ return;
+
+ pci_free_consistent(hba->pci_dev, hba->ctx_size,
+ hba->ctx_addr, hba->ctx_dma_hndl);
+ hba->ctx_dma_hndl = 0;
+ hba->ctx_addr = NULL;
+ hba->ctx_size = 0;
+}
+
+
+static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
+ struct bnx2i_endpoint *ep)
+{
+ int cur_idx;
+
+ write_lock(&hba->ep_rdwr_lock);
+ cur_idx = hba->ep_destroy_prod_idx++;
+ hba->ep_destroy_list[cur_idx] = ep;
+ hba->ep_destroy_prod_idx %= hba->ep_destroy_max_idx;
+ write_unlock(&hba->ep_rdwr_lock);
+ return 0;
+}
+
+struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba)
+{
+ int cur_idx;
+
+ read_lock(&hba->ep_rdwr_lock);
+ if (hba->ep_destroy_prod_idx == hba->ep_destroy_cons_idx) {
+ read_unlock(&hba->ep_rdwr_lock);
+ return NULL;
+ }
+ cur_idx = hba->ep_destroy_cons_idx++;
+ hba->ep_destroy_cons_idx %= hba->ep_destroy_max_idx;
+ read_unlock(&hba->ep_rdwr_lock);
+
+ return (hba->ep_destroy_list[cur_idx]);
+}
+
+static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
+ struct bnx2i_endpoint *ep)
+{
+ int cur_idx;
+
+ write_lock(&hba->ep_rdwr_lock);
+ cur_idx = hba->ep_ofld_prod_idx++;
+ hba->ep_ofld_list[cur_idx] = ep;
+ hba->ep_ofld_prod_idx %= hba->ep_ofld_max_idx;
+ write_unlock(&hba->ep_rdwr_lock);
+ return 0;
+}
+
+struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba)
+{
+ int cur_idx;
+
+ read_lock(&hba->ep_rdwr_lock);
+ if (hba->ep_ofld_prod_idx == hba->ep_ofld_cons_idx) {
+ read_unlock(&hba->ep_rdwr_lock);
+ return NULL;
+ }
+ cur_idx = hba->ep_ofld_cons_idx++;
+ hba->ep_ofld_cons_idx %= hba->ep_ofld_max_idx;
+ read_unlock(&hba->ep_rdwr_lock);
+
+ return (hba->ep_ofld_list[cur_idx]);
+}
+
+static int bnx2i_init_ep_ofld_destroy_que(struct bnx2i_hba *hba)
+{
+ rwlock_init(&hba->ep_rdwr_lock);
+ hba->ep_ofld_list = (struct bnx2i_endpoint **)
+ kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!hba->ep_ofld_list)
+ return -ENOMEM;
+
+ hba->ep_ofld_prod_idx = 0;
+ hba->ep_ofld_cons_idx = 0;
+ hba->ep_ofld_max_idx =
+ PAGE_SIZE / sizeof(struct bnx2i_endpoint *) - 1;
+
+ hba->ep_destroy_list = (struct bnx2i_endpoint **)
+ kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!hba->ep_destroy_list) {
+ kfree(hba->ep_ofld_list);
+ hba->ep_ofld_list = NULL;
+ return -ENOMEM;
+ }
+
+ hba->ep_destroy_prod_idx = 0;
+ hba->ep_destroy_cons_idx = 0;
+ hba->ep_destroy_max_idx =
+ PAGE_SIZE / sizeof(struct bnx2i_endpoint *) - 1;
+ return 0;
+}
+
+
+static void bnx2i_free_ep_ofld_destroy_que(struct bnx2i_hba *hba)
+{
+ if (hba->ep_ofld_list) {
+ kfree(hba->ep_ofld_list);
+ hba->ep_ofld_list = NULL;
+ }
+ if (hba->ep_destroy_list) {
+ kfree(hba->ep_destroy_list);
+ hba->ep_destroy_list = NULL;
+ }
+}
+
+/*
+ * 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 bnx2i_hba *hba = NULL;
+
+ hba = kmalloc(sizeof(struct bnx2i_hba), GFP_KERNEL);
+
+ if (hba == NULL)
+ return NULL;
+
+ memset((void *) hba, 0, sizeof(struct bnx2i_hba));
+
+ /* Get PCI related information and update hba struct members */
+ hba->pci_dev = cnic->pcidev;
+ if (hba->pci_dev) {
+ hba->pci_did = hba->pci_dev->device;
+ hba->pci_vid = hba->pci_dev->vendor;
+ hba->pci_sdid = hba->pci_dev->subsystem_device;
+ hba->pci_svid = hba->pci_dev->subsystem_vendor;
+ hba->pci_func = PCI_FUNC(hba->pci_dev->devfn);
+ hba->pci_devno = PCI_SLOT(hba->pci_dev->devfn);
+ hba->pci_intr_num = hba->pci_dev->irq;
+ }
+
+ INIT_LIST_HEAD(&hba->active_sess);
+ if (bnx2i_init_ep_ofld_destroy_que(hba))
+ goto ep_ofld_que_err;
+
+ hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
+
+ /* TODO: different values for Teton/Xinan/Everest */
+ 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 */
+ hba->max_sqes = BNX2I_SQ_WQES_DEFAULT;
+ hba->max_rqes = BNX2I_RQ_WQES_DEFAULT;
+ hba->max_cqes = BNX2I_CQ_WQES_DEFAULT;
+ hba->num_ccell = BNX2I_CCELLS_DEFAULT;
+
+ if (bnx2i_setup_mp_bdt(hba)) {
+ goto mp_bdt_err;
+ }
+
+ spin_lock_init(&hba->lock);
+ /* initialize timer and wait queue used for resource cleanup when
+ * interface is brought down */
+ init_timer(&hba->hba_timer);
+ init_waitqueue_head(&hba->eh_wait);
+
+ INIT_WORK(&hba->err_rec_task, conn_err_recovery_task);
+ hba->sess_recov_prod_idx = 0;
+ hba->sess_recov_cons_idx = 0;
+ hba->sess_recov_max_idx = 0;
+ hba->sess_recov_list =
+ (struct bnx2i_sess **)kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!hba->sess_recov_list)
+ goto rec_que_err;
+ hba->sess_recov_max_idx = PAGE_SIZE / sizeof (struct bnx2i_sess *) - 1;
+
+ bnx2i_init_ctx_dump_mem(hba);
+
+ return hba;
+
+rec_que_err:
+ bnx2i_free_mp_bdt(hba);
+mp_bdt_err:
+ bnx2i_release_free_cid_que(hba);
+cid_que_err:
+ bnx2i_free_ep_ofld_destroy_que(hba);
+ep_ofld_que_err:
+ bnx2i_free_hba(hba);
+
+ return NULL;
+}
+
+
+/*
+ * free adapter structure and call various cleanup routines.
+ */
+void bnx2i_free_hba(struct bnx2i_hba *hba)
+{
+ if (hba == NULL)
+ return;
+
+ bnx2i_free_ctx_dump_mem(hba);
+
+ bnx2i_free_mp_bdt(hba);
+ bnx2i_release_free_cid_que(hba);
+ bnx2i_free_ep_ofld_destroy_que(hba);
+
+ INIT_LIST_HEAD(&hba->active_sess);
+ /* Free memory held by hba structure */
+ kfree((void *)hba);
+}
+
+
+
+
+/*
+ * return all commands in active queue which should already have been
+ * cleaned up by the cnic device.
+ */
+static void bnx2i_flush_active_cmd_queue(struct bnx2i_sess *sess, int err_code)
+{
+ struct list_head *list;
+ struct list_head *tmp;
+ struct bnx2i_cmd *cmd;
+ unsigned long flags;
+ if (!sess->num_active_cmds)
+ return;
+
+ spin_lock_irqsave(sess->host->host_lock, flags);
+ list_for_each_safe(list, tmp, &sess->active_cmds) {
+ cmd = (struct bnx2i_cmd *) list;
+ cmd->req.itt &= ISCSI_CMD_RESPONSE_INDEX;
+ bnx2i_iscsi_unmap_sg_list(cmd);
+ cmd->cmd_state = ISCSI_CMD_STATE_COMPLETED;
+ list_del_init(&cmd->link);
+ bnx2i_return_failed_command(sess, cmd, err_code);
+ bnx2i_free_cmd(sess, cmd);
+ }
+ spin_unlock_irqrestore(sess->host->host_lock, flags);
+}
+
+
+/*
+ * initiate cleanup of outstanding commands for sess recovery
+ */
+static int bnx2i_session_recovery_start(struct bnx2i_sess *sess, int err_code)
+{
+ if (unlikely(!sess)) {
+ printk(KERN_ALERT "sess_recov_start: sess not active\n");
+ return FAILED;
+ }
+
+ if (!is_sess_active(sess)) {
+ wait_event_interruptible_timeout(sess->er_wait,
+ (sess->state ==
+ BNX2I_SESS_IN_FFP), HZ);
+ if (signal_pending(current))
+ flush_signals(current);
+ if (!is_sess_active(sess)) {
+ printk(KERN_ALERT "sess_reco: sess still not active\n");
+ sess->lead_conn->state = CONN_STATE_XPORT_FREEZE;
+ return FAILED;
+ }
+ }
+
+ return SUCCESS;
+}
+
+
+/*
+ * SCSI host reset handler, which is translates to iSCSI session
+ * recovery
+ */
+int bnx2i_do_iscsi_sess_recovery(struct bnx2i_sess *sess, int err_code)
+{
+ struct bnx2i_hba *hba = NULL;
+ struct bnx2i_conn *conn = sess->lead_conn;
+
+ if (bnx2i_session_recovery_start(sess, err_code) != SUCCESS) {
+ printk(KERN_INFO "bnx2i: sess rec start returned error\n");
+ return FAILED;
+ }
+ hba = sess->hba;
+
+ sess->recovery_state = ISCSI_SESS_RECOVERY_OPEN_ISCSI;
+ iscsi_conn_error(conn->cls_conn, ISCSI_ERR_CONN_FAILED);
+
+ /* if session teardown is because of net interface down,
+ * no need to wait for complete recovery */
+ if (err_code == DID_NO_CONNECT) {
+ wait_event_interruptible_timeout(sess->er_wait,
+ !conn->ep,
+ msecs_to_jiffies(1000));
+ } else {
+ wait_event_interruptible(sess->er_wait,
+ ((sess->recovery_state &
+ ISCSI_SESS_RECOVERY_COMPLETE) ||
+ (sess->recovery_state &
+ ISCSI_SESS_RECOVERY_FAILED)));
+ }
+
+ if (signal_pending(current))
+ flush_signals(current);
+
+ if (err_code == DID_NO_CONNECT)
+ return SUCCESS;
+
+ if (sess->recovery_state & ISCSI_SESS_RECOVERY_COMPLETE) {
+ printk(KERN_INFO "bnx2i: host #%d reset succeeded\n",
+ sess->host->host_no);
+ sess->state = BNX2I_SESS_IN_FFP;
+ } else {
+ return FAILED;
+ }
+ sess->recovery_state = 0;
+ return SUCCESS;
+}
+
+
+/*
+ * free up resources held by this session
+ */
+int bnx2i_iscsi_sess_release(struct bnx2i_hba *hba, struct bnx2i_sess *sess)
+{
+ if (!sess)
+ return 0;
+
+ bnx2i_release_free_itt_queue(sess);
+ bnx2i_free_cmd_pool(sess);
+ bnx2i_free_bd_table_pool(sess);
+ bnx2i_free_all_bdt_resc_pages(sess);
+
+ list_del_init(&sess->link);
+ hba->num_active_sess--;
+
+ return 0;
+}
+
+
+/*
+ * initialize various per session statistic counters
+ */
+static void bnx2i_init_iscsi_sess_stats(struct bnx2i_sess *sess)
+{
+ if (!sess)
+ return;
+
+ sess->violation_notified = 0;
+
+ sess->total_data_octets_sent = 0;
+ sess->total_data_octets_rcvd = 0;
+ sess->conn_login_ok = 0;
+ sess->conn_login_failed = 0;
+ sess->num_login_req_pdus = 0;
+ sess->num_login_resp_pdus = 0;
+ sess->num_scsi_cmd_pdus = 0;
+ sess->num_scsi_resp_pdus = 0;
+ sess->num_nopout_pdus = 0;
+ sess->num_nopin_pdus = 0;
+ sess->num_reject_pdus = 0;
+ sess->num_async_pdus = 0;
+ sess->num_dataout_pdus = 0;
+ sess->num_r2t_pdus = 0;
+ sess->num_datain_pdus = 0;
+ sess->num_snack_pdus = 0;
+ sess->num_text_req_pdus = 0;
+ sess->num_text_resp_pdus = 0;
+ sess->num_tmf_req_pdus = 0;
+ sess->num_tmf_resp_pdus = 0;
+ sess->num_logout_req_pdus = 0;
+ sess->num_logout_resp_pdus = 0;
+}
+
+
+/*
+ * set iSCSI parameter values to defaults, as defined in rfc3720
+ */
+static void bnx2i_sess_set_param_defaults(struct bnx2i_sess *sess)
+{
+ sess->initial_r2t = ISCSI_DEFAULT_INITIAL_R2T;
+ sess->max_r2t = ISCSI_DEFAULT_MAX_OUTSTANDING_R2T;
+ sess->imm_data = ISCSI_DEFAULT_IMMEDIATE_DATA;
+ sess->first_burst_len = ISCSI_DEFAULT_FIRST_BURST_LENGTH;
+ sess->max_burst_len = ISCSI_DEFAULT_MAX_BURST_LENGTH;
+ sess->time2wait = 2;
+ sess->time2retain = 20;
+}
+
+
+/*
+ * initialize session structure elements and allocate per sess resources
+ */
+int bnx2i_iscsi_sess_new(struct bnx2i_hba *hba, struct bnx2i_sess *sess)
+{
+ int rc;
+
+ spin_lock(&hba->lock);
+ list_add_tail(&sess->link, &hba->active_sess);
+ hba->num_active_sess++;
+ spin_unlock(&hba->lock);
+
+ sess->sq_size = hba->max_sqes;
+ sess->tsih = 0;
+ sess->lead_conn = NULL;
+
+ spin_lock_init(&sess->lock);
+
+ /* initialize active connection list */
+ INIT_LIST_HEAD(&sess->conn_list);
+ INIT_LIST_HEAD(&sess->free_cmds);
+
+ INIT_LIST_HEAD(&sess->active_cmds);
+ sess->num_active_cmds = 0;
+
+ sess->num_active_conn = 0;
+ sess->max_conns = 1;
+ sess->conn_id = 0;
+ sess->target_name = NULL;
+
+ sess->state = BNX2I_SESS_INITIAL;
+ sess->recovery_state = 0;
+
+ if (bnx2i_alloc_bd_table_pool(sess) != 0) {
+ printk(KERN_ERR "sess_new: unable to alloc bd table pool\n");
+ rc = -ENOMEM;
+ goto err_bd_pool;
+ }
+
+ if (bnx2i_alloc_cmd_pool(sess) != 0) {
+ printk(KERN_ERR "sess_new: alloc cmd pool failed\n");
+ rc = -ENOMEM;
+ goto err_cmd_pool;
+ }
+
+ rc = bnx2i_setup_free_itt_queue(sess);
+ if (rc) {
+ rc = -ENOMEM;
+ goto err_itt_que;
+ }
+
+ init_timer(&sess->abort_timer);
+ init_waitqueue_head(&sess->er_wait);
+ init_timer(&sess->poll_timer);
+
+ bnx2i_init_iscsi_sess_stats(sess);
+ bnx2i_sess_set_param_defaults(sess);
+
+ return 0;
+
+err_itt_que:
+ bnx2i_free_cmd_pool(sess);
+err_cmd_pool:
+ bnx2i_free_bd_table_pool(sess);
+err_bd_pool:
+ return rc;
+}
+
+
+/*
+ * Login related resources is freed in this routine.
+ */
+void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
+ struct bnx2i_conn *conn)
+{
+ if (conn->gen_pdu.resp_bd_tbl) {
+ pci_free_consistent(hba->pci_dev, PAGE_SIZE,
+ conn->gen_pdu.resp_bd_tbl,
+ conn->gen_pdu.resp_bd_dma);
+ conn->gen_pdu.resp_bd_tbl = NULL;
+ }
+
+ if (conn->gen_pdu.req_bd_tbl) {
+ pci_free_consistent(hba->pci_dev, PAGE_SIZE,
+ conn->gen_pdu.req_bd_tbl,
+ conn->gen_pdu.req_bd_dma);
+ conn->gen_pdu.req_bd_tbl = NULL;
+ }
+
+ if (conn->gen_pdu.resp_buf) {
+ pci_free_consistent(hba->pci_dev, ISCSI_CONN_LOGIN_BUF_SIZE,
+ conn->gen_pdu.resp_buf,
+ conn->gen_pdu.resp_dma_addr);
+ conn->gen_pdu.resp_buf = NULL;
+ }
+
+ if (conn->gen_pdu.req_buf) {
+ pci_free_consistent(hba->pci_dev, ISCSI_CONN_LOGIN_BUF_SIZE,
+ conn->gen_pdu.req_buf,
+ conn->gen_pdu.req_dma_addr);
+ conn->gen_pdu.req_buf = NULL;
+ }
+}
+
+
+/*
+ * Login & nop-in related resources is allocated in this routine.
+ */
+static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
+ struct bnx2i_conn *conn)
+{
+ /* Allocate memory for login request/response buffers */
+ conn->gen_pdu.req_buf =
+ (char *) pci_alloc_consistent(hba->pci_dev,
+ ISCSI_CONN_LOGIN_BUF_SIZE,
+ &conn->gen_pdu.req_dma_addr);
+ if (conn->gen_pdu.req_buf == NULL)
+ goto login_req_buf_failure;
+
+ conn->gen_pdu.req_buf_size = 0;
+ conn->gen_pdu.req_wr_ptr = conn->gen_pdu.req_buf;
+
+ conn->gen_pdu.resp_buf =
+ (char *) pci_alloc_consistent(hba->pci_dev,
+ ISCSI_CONN_LOGIN_BUF_SIZE,
+ &conn->gen_pdu.resp_dma_addr);
+ if (conn->gen_pdu.resp_buf == NULL)
+ goto login_resp_buf_failure;
+
+ conn->gen_pdu.resp_buf_size = ISCSI_CONN_LOGIN_BUF_SIZE;
+ conn->gen_pdu.resp_wr_ptr = conn->gen_pdu.resp_buf;
+
+ conn->gen_pdu.req_bd_tbl =
+ (char *) pci_alloc_consistent(hba->pci_dev, PAGE_SIZE,
+ &conn->gen_pdu.req_bd_dma);
+ if (conn->gen_pdu.req_bd_tbl == NULL)
+ goto login_req_bd_tbl_failure;
+
+ conn->gen_pdu.resp_bd_tbl =
+ (char *) pci_alloc_consistent(hba->pci_dev, PAGE_SIZE,
+ &conn->gen_pdu.resp_bd_dma);
+ if (conn->gen_pdu.resp_bd_tbl == NULL)
+ goto login_resp_bd_tbl_failure;
+
+ return 0;
+
+login_resp_bd_tbl_failure:
+ pci_free_consistent(hba->pci_dev, PAGE_SIZE, conn->gen_pdu.req_bd_tbl,
+ conn->gen_pdu.req_bd_dma);
+ conn->gen_pdu.req_bd_tbl = NULL;
+
+login_req_bd_tbl_failure:
+ pci_free_consistent(hba->pci_dev, ISCSI_CONN_LOGIN_BUF_SIZE,
+ conn->gen_pdu.resp_buf,
+ conn->gen_pdu.resp_dma_addr);
+ conn->gen_pdu.resp_buf = NULL;
+login_resp_buf_failure:
+ pci_free_consistent(hba->pci_dev, ISCSI_CONN_LOGIN_BUF_SIZE,
+ conn->gen_pdu.req_buf, conn->gen_pdu.req_dma_addr);
+ conn->gen_pdu.req_buf = NULL;
+login_req_buf_failure:
+ printk(KERN_ERR "bnx2i:a conn login resource alloc failed!!\n");
+ return -ENOMEM;
+
+}
+
+
+/*
+ * connection structure is initialized in this routine.
+ */
+int bnx2i_iscsi_conn_new(struct bnx2i_sess *sess, struct bnx2i_conn *conn)
+{
+ int ret_code = 0;
+ struct bnx2i_hba *hba = sess->hba;
+
+ if (!sess || !conn || !hba)
+ return -EINVAL;
+
+ conn->sess = sess;
+ conn->header_digest_en = 0;
+ conn->data_digest_en = 0;
+
+ spin_lock_init(&conn->lock);
+
+ init_timer(&conn->poll_timer);
+ conn->gen_pdu.cmd = NULL;
+
+ /* 'ep' ptr will be assigned in bind() call */
+ conn->ep = NULL;
+
+ ret_code = bnx2i_conn_alloc_login_resources(hba, conn);
+ if (ret_code != 0) {
+ printk(KERN_ALERT "conn_new: login resc alloc failed!!\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+
+/*
+ * extract & update SN counters from login response
+ */
+static int bnx2i_login_resp_update_cmdsn(struct bnx2i_conn *conn)
+{
+ u32 max_cmdsn;
+ u32 exp_cmdsn;
+ u32 stat_sn;
+ struct bnx2i_sess *sess = conn->sess;
+ struct iscsi_nopin *hdr = NULL;
+
+ hdr = (struct iscsi_nopin *) &conn->gen_pdu.resp_hdr;
+
+ max_cmdsn = ntohl(hdr->max_cmdsn);
+ exp_cmdsn = ntohl(hdr->exp_cmdsn);
+ stat_sn = ntohl(hdr->statsn);
+#define SN_DELTA_ISLAND 0xffff
+ if (max_cmdsn < exp_cmdsn -1 &&
+ max_cmdsn > exp_cmdsn - SN_DELTA_ISLAND)
+ return -EINVAL;
+
+ if (max_cmdsn > sess->max_cmdsn ||
+ max_cmdsn < sess->max_cmdsn - SN_DELTA_ISLAND)
+ sess->max_cmdsn = max_cmdsn;
+
+ if (exp_cmdsn > sess->exp_cmdsn ||
+ exp_cmdsn < sess->exp_cmdsn - SN_DELTA_ISLAND) {
+ sess->exp_cmdsn = exp_cmdsn;
+ }
+ if (stat_sn == conn->exp_statsn)
+ conn->exp_statsn++;
+
+ return 0;
+}
+
+
+/*
+ * update iSCSI SN counters for the given session
+ */
+void bnx2i_update_cmd_sequence(struct bnx2i_sess *sess,
+ u32 exp_sn, u32 max_sn)
+{
+ u32 exp_cmdsn = exp_sn;
+ u32 max_cmdsn = max_sn;
+
+ if (max_cmdsn < exp_cmdsn -1 &&
+ max_cmdsn > exp_cmdsn - SN_DELTA_ISLAND) {
+ printk(KERN_ALERT "cmd_sequence: error, exp 0x%x, max 0x%x\n",
+ exp_cmdsn, max_cmdsn);
+ BUG_ON(1);
+ }
+ if (max_cmdsn > sess->max_cmdsn ||
+ max_cmdsn < sess->max_cmdsn - SN_DELTA_ISLAND)
+ sess->max_cmdsn = max_cmdsn;
+ if (exp_cmdsn > sess->exp_cmdsn ||
+ exp_cmdsn < sess->exp_cmdsn - SN_DELTA_ISLAND) {
+ sess->exp_cmdsn = exp_cmdsn;
+ }
+
+ return;
+}
+
+
+/*
+ * This function propogates SCSI response to SCSI-ML by calling
+ * scsi_done() and also returns command struct back to free pool
+ */
+int bnx2i_process_scsi_resp(struct bnx2i_cmd *cmd)
+{
+ int ret = 0;
+ struct scsi_cmnd *sc = cmd->scsi_cmd;
+ struct Scsi_Host *host;
+ int res_count = 0;
+
+ if (!sc)
+ return 0;
+
+ host = cmd->conn->sess->host;
+ sc->result = (DID_OK << 16) | cmd->scsi_status;
+
+ if (cmd->iscsi_resp != ISCSI_STATUS_CMD_COMPLETED) {
+ sc->result = (DID_ERROR << 16);
+ goto call_scsi_done;
+ }
+
+ if (sc->sc_data_direction == DMA_TO_DEVICE) {
+ goto call_scsi_done;
+ }
+
+ if (cmd->scsi_uflow) {
+ res_count = cmd->resi_len;
+ if (res_count > 0 && res_count <= sc->request_bufflen)
+ sc->resid = res_count;
+ else
+ sc->result = (DID_BAD_TARGET << 16) |
+ cmd->scsi_status;
+ } else if (cmd->scsi_oflow) {
+ sc->resid = res_count;
+ }
+
+call_scsi_done:
+ if ((cmd->cmd_state == ISCSI_CMD_STATE_ABORT_PEND) ||
+ (cmd->cmd_state == ISCSI_CMD_STATE_CLEANUP_PEND)) {
+ printk(KERN_ALERT "scsi_resp: command is being aborted\n");
+ return -1;
+ }
+
+ spin_lock(host->host_lock);
+ cmd->scsi_cmd = NULL;
+ cmd->conn->sess->num_active_cmds--;
+ sc->scsi_done(sc);
+ bnx2i_free_cmd(cmd->conn->sess, cmd);
+ spin_unlock(host->host_lock);
+ return ret;
+}
+
+
+
+/*
+ * login response PDU is pushed to application daemon by
+ * calling iscsi_recv_pdu()
+ */
+int bnx2i_indicate_login_resp(struct bnx2i_conn *conn)
+{
+ int ret = 0;
+ int data_len = 0;
+ struct iscsi_login_rsp *login_resp =
+ (struct iscsi_login_rsp *) &conn->gen_pdu.resp_hdr;
+
+ /* check if this is the first login response for this connection.
+ * If yes, we need to copy initial StatSN to connection structure.
+ */
+ if (conn->exp_statsn == STATSN_UPDATE_SIGNATURE) {
+ conn->exp_statsn = ntohl(login_resp->statsn) + 1;
+ }
+
+ ret = bnx2i_login_resp_update_cmdsn(conn);
+ if (ret != 0) {
+ return -EINVAL;
+ }
+
+ data_len = conn->gen_pdu.resp_wr_ptr - conn->gen_pdu.resp_buf;
+ iscsi_recv_pdu(conn->cls_conn, (struct iscsi_hdr *) login_resp,
+ (char *) conn->gen_pdu.resp_buf, data_len);
+
+ return 0;
+}
+
+
+/*
+ * deliver logout response PDU to application daemon
+ */
+int bnx2i_indicate_logout_resp(struct bnx2i_conn *conn)
+{
+ struct iscsi_logout_rsp *logout_resp =
+ (struct iscsi_logout_rsp *) &conn->gen_pdu.resp_hdr;
+
+ iscsi_recv_pdu(conn->cls_conn, (struct iscsi_hdr *) logout_resp,
+ (char *) NULL, 0);
+
+ return 0;
+}
+
+
+/*
+ * deliver iSCSI async PDU to user daemon
+ */
+int bnx2i_indicate_async_mesg(struct bnx2i_conn *conn)
+{
+ struct iscsi_async *async_msg =
+ (struct iscsi_async *) &conn->gen_pdu.resp_hdr;
+
+ iscsi_recv_pdu(conn->cls_conn, (struct iscsi_hdr *) async_msg,
+ (char *) NULL, 0);
+
+ return 0;
+}
+
+
+
+/*
+ * Function : bnx2i_process_nopin
+ */
+int bnx2i_process_nopin(struct bnx2i_conn *conn, struct bnx2i_cmd *cmd,
+ char *data_buf, int data_len)
+{
+ struct iscsi_nopin *nopin_msg =
+ (struct iscsi_nopin *) &conn->gen_pdu.resp_hdr;
+
+ iscsi_recv_pdu(conn->cls_conn, (struct iscsi_hdr *) nopin_msg,
+ (char *) data_buf, data_len);
+
+ spin_lock(conn->sess->host->host_lock);
+ list_del_init(&cmd->link);
+ bnx2i_free_cmd(cmd->conn->sess, cmd);
+ spin_unlock(conn->sess->host->host_lock);
+
+ return 0;
+}
+
+
+
+/*
+ * 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 *conn)
+{
+ struct iscsi_bd *bd_tbl = NULL;
+
+ bd_tbl = (struct iscsi_bd *) conn->gen_pdu.req_bd_tbl;
+
+ bd_tbl->buffer_addr_hi =
+ (u32) ((u64) conn->gen_pdu.req_dma_addr >> 32);
+ bd_tbl->buffer_addr_lo = (u32) conn->gen_pdu.req_dma_addr;
+ bd_tbl->buffer_length = conn->gen_pdu.req_wr_ptr -
+ 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 *) conn->gen_pdu.resp_bd_tbl;
+ bd_tbl->buffer_addr_hi = (u64) conn->gen_pdu.resp_dma_addr >> 32;
+ bd_tbl->buffer_addr_lo = (u32) conn->gen_pdu.resp_dma_addr;
+ bd_tbl->buffer_length = ISCSI_CONN_LOGIN_BUF_SIZE;
+ bd_tbl->reserved0 = 0;
+ bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
+ ISCSI_BD_FIRST_IN_BD_CHAIN;
+}
+
+
+
+/*
+ * 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 bnx2i_cmd *cmnd)
+{
+ int rc = 0;
+ char *buf = NULL;
+ int data_len = 0;
+ struct bnx2i_conn *conn = cmnd->conn;
+
+ bnx2i_iscsi_prep_generic_pdu_bd(conn);
+ switch (cmnd->iscsi_opcode & ISCSI_OPCODE_MASK) {
+ case ISCSI_OP_LOGIN:
+ bnx2i_send_iscsi_login(conn, cmnd);
+ break;
+
+ case ISCSI_OP_NOOP_OUT:
+ data_len = conn->gen_pdu.req_buf_size;
+ buf = conn->gen_pdu.req_buf;
+ if (data_len)
+ rc = bnx2i_send_iscsi_nopout(conn, cmnd,
+ ISCSI_RESERVED_TAG,
+ buf, data_len, 1);
+ else
+ rc = bnx2i_send_iscsi_nopout(conn, cmnd,
+ ISCSI_RESERVED_TAG,
+ NULL, 0, 1);
+ break;
+
+ case ISCSI_OP_LOGOUT:
+ rc = bnx2i_send_iscsi_logout(conn, cmnd);
+ break;
+
+ default:
+ printk(KERN_ALERT "send_gen: unsupported op 0x%x\n",
+ cmnd->iscsi_opcode);
+ }
+ return rc;
+}
+
+
+/**********************************************************************
+ * SCSI-ML Interface
+ **********************************************************************/
+
+static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc,
+ struct bnx2i_cmd *cmd)
+{
+ u32 dword;
+ int lpcnt = 0;
+ u8 *srcp = NULL;
+ u32 *dstp = NULL;
+ u32 scsi_lun[2];
+
+ int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
+ cmd->req.lun[0] = ntohl(scsi_lun[0]);
+ cmd->req.lun[1] = ntohl(scsi_lun[1]);
+
+ lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
+ srcp = (u8 *) sc->cmnd;
+ dstp = (u32 *) cmd->req.cdb;
+ while (lpcnt--) {
+ memcpy(&dword, 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);
+ }
+}
+
+
+
+/*
+ * handles SCSI command queued by SCSI-ML, allocates a command structure,
+ * assigning CMDSN, mapping SG buffers and handing over request to CNIC.
+ */
+int bnx2i_queuecommand(struct scsi_cmnd *sc,
+ void (*done) (struct scsi_cmnd *))
+{
+ struct Scsi_Host *shost;
+ struct bnx2i_sess *sess = NULL;
+ struct bnx2i_conn *conn = NULL;
+ struct bnx2i_cmd *cmd = NULL;
+ struct bnx2i_hba *hba = NULL;
+ static int old_recovery_state = 0;
+
+ sc->scsi_done = done;
+ sc->result = 0;
+ shost = sc->device->host;
+ sess = iscsi_hostdata(shost->hostdata);
+ BUG_ON(shost != sess->host);
+
+ if (sess) {
+ hba = sess->hba;
+ } else {
+ printk(KERN_ALERT "bnx2i: quecmd: Error dev not found \n");
+ goto dev_not_found;
+ }
+
+#define iscsi_cmd_win_closed(_sess) \
+ ((int) (_sess->max_cmdsn - _sess->cmdsn) < 0)
+
+ if (iscsi_cmd_win_closed(sess)) {
+ goto iscsi_win_closed;
+ }
+
+ if ((sess->state & BNX2I_SESS_IN_SHUTDOWN) ||
+ (sess->state & BNX2I_SESS_IN_LOGOUT)) {
+ goto dev_not_found;
+ }
+
+ if (sess->recovery_state) {
+ if (old_recovery_state != sess->recovery_state) {
+ old_recovery_state = sess->recovery_state;
+ }
+
+ if (sess->recovery_state & ISCSI_SESS_RECOVERY_FAILED)
+ goto dev_not_found;
+ else if (!(sess->recovery_state & ISCSI_SESS_RECOVERY_COMPLETE))
+ goto iscsi_win_closed;
+ else
+ sess->recovery_state = 0;
+ }
+
+ cmd = bnx2i_alloc_cmd(sess);
+ if (cmd == NULL) {
+ /* This should never happen as cmd list size == SHT->can_queue
+ */
+ goto cmd_not_accepted;
+ }
+
+ cmd->conn = conn = sess->lead_conn;
+ cmd->scsi_cmd = sc;
+ cmd->req.total_data_transfer_length = sc->request_bufflen;
+ cmd->iscsi_opcode = ISCSI_OPCODE_SCSI_CMD;
+ cmd->req.cmd_sn = sess->cmdsn++;
+
+ bnx2i_iscsi_map_sg_list(cmd);
+ bnx2i_cpy_scsi_cdb(sc, cmd);
+
+ if (sc->sc_data_direction == DMA_TO_DEVICE) {
+ cmd->req.op_attr = ISCSI_CMD_REQUEST_WRITE;
+ cmd->req.itt |= (ISCSI_TASK_TYPE_WRITE <<
+ ISCSI_CMD_REQUEST_TYPE_SHIFT);
+ bnx2i_setup_write_cmd_bd_info(cmd);
+ } else {
+ cmd->req.op_attr = ISCSI_CMD_REQUEST_READ;
+ cmd->req.itt |= (ISCSI_TASK_TYPE_READ <<
+ ISCSI_CMD_REQUEST_TYPE_SHIFT);
+ }
+ cmd->req.num_bds = cmd->bd_tbl->bd_valid;
+ if (!cmd->bd_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;
+ }
+
+ cmd->cmd_state = ISCSI_CMD_STATE_INITIATED;
+ sc->SCp.ptr = (char *) cmd;
+
+ if (cmd->req.itt != ITT_INVALID_SIGNATURE) {
+ bnx2i_send_iscsi_scsicmd(conn, cmd);
+ list_add_tail(&cmd->link, &sess->active_cmds);
+ sess->num_active_cmds++;
+ }
+ return 0;
+
+iscsi_win_closed:
+cmd_not_accepted:
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+dev_not_found:
+ sc->sense_buffer[0] = 0x70;
+ sc->sense_buffer[2] = NOT_READY;
+ sc->sense_buffer[7] = 0x6;
+ sc->sense_buffer[12] = 0x08;
+ sc->sense_buffer[13] = 0x00;
+ sc->result = (DID_NO_CONNECT << 16);
+ sc->resid = sc->request_bufflen;
+ sc->scsi_done(sc);
+ return 0;
+}
+
+
+
+/*
+ * TMF request timeout handler
+ */
+static void bnx2i_iscsi_tmf_timer(unsigned long data)
+{
+ struct bnx2i_cmd *cmd = (struct bnx2i_cmd *) data;
+
+ printk(KERN_ALERT "TMF timer: abort failed, cmd 0x%p\n", cmd);
+ cmd->cmd_state = ISCSI_CMD_STATE_FAILED;
+ wake_up(&cmd->conn->sess->er_wait);
+}
+
+
+/*
+ * initiate command abort process by requesting CNIC to send
+ * an iSCSI TMF request to target
+ */
+static int bnx2i_initiate_abort_cmd(struct scsi_cmnd *sc)
+{
+ struct bnx2i_cmd *cmd = (struct bnx2i_cmd *) sc->SCp.ptr;
+ struct bnx2i_cmd *tmf_cmd = NULL;
+ struct Scsi_Host *shost = cmd->scsi_cmd->device->host;
+ struct bnx2i_conn *conn = cmd->conn;
+ struct bnx2i_sess *sess = NULL;
+ struct bnx2i_hba *hba = NULL;
+
+ shost = cmd->scsi_cmd->device->host;
+ sess = iscsi_hostdata(shost->hostdata);
+ BUG_ON(shost != sess->host);
+
+ if (sess && (is_sess_active(sess))) {
+ hba = sess->hba;
+ } else {
+ return FAILED;
+ }
+
+ bnx2i_setup_ictx_dump(hba, conn);
+
+ if (cmd->scsi_cmd != sc) {
+ /* command already completed to scsi mid-layer */
+ goto cmd_not_active;
+ }
+
+ tmf_cmd = bnx2i_alloc_cmd(sess);
+ if (cmd == NULL) {
+ goto lack_of_resc;
+ }
+
+ tmf_cmd->conn = conn = sess->lead_conn;
+ tmf_cmd->scsi_cmd = NULL;
+ tmf_cmd->iscsi_opcode = ISCSI_OPCODE_TMF_REQUEST;
+ tmf_cmd->req.cmd_sn = sess->cmdsn;
+ tmf_cmd->tmf_ref_itt = cmd->req.itt;
+ tmf_cmd->tmf_ref_cmd = cmd;
+ tmf_cmd->tmf_ref_sc = cmd->scsi_cmd;
+ cmd->cmd_state = ISCSI_CMD_STATE_ABORT_PEND;
+ tmf_cmd->cmd_state = ISCSI_CMD_STATE_INITIATED;
+
+ sess->abort_timer.expires = 10*HZ + jiffies;
+ sess->abort_timer.function = bnx2i_iscsi_tmf_timer;
+ sess->abort_timer.data = (unsigned long)tmf_cmd;
+ add_timer(&sess->abort_timer);
+
+ bnx2i_send_iscsi_tmf(conn, tmf_cmd);
+
+ /* update iSCSI context for this conn, wait for CNIC to complete */
+ wait_event_interruptible(sess->er_wait,
+ tmf_cmd->cmd_state != ISCSI_CMD_STATE_INITIATED);
+
+ if (signal_pending(current))
+ flush_signals(current);
+
+ del_timer_sync(&sess->abort_timer);
+
+ if (tmf_cmd->cmd_state == ISCSI_CMD_STATE_FAILED) {
+ printk(KERN_ALERT "abort: abort failed, cmd 0x%p\n", tmf_cmd);
+ /* TMF timed out, return error status and let SCSI-ML do
+ * session recovery.
+ */
+ list_del_init(&tmf_cmd->link);
+ bnx2i_free_cmd(sess, tmf_cmd);
+ return FAILED;
+ }
+
+ list_del_init(&tmf_cmd->link);
+ bnx2i_free_cmd(sess, tmf_cmd);
+
+ if ((cmd->scsi_cmd->result & 0xFF0000) == (DID_ABORT << 16)) {
+ cmd->cmd_state = ISCSI_CMD_STATE_CLEANUP_PEND;
+ bnx2i_send_cmd_cleanup_req(hba, cmd);
+ wait_event_interruptible_timeout(sess->er_wait,
+ (cmd->cmd_state ==
+ ISCSI_CMD_STATE_CLEANUP_CMPL),
+ msecs_to_jiffies(
+ ISCSI_CMD_CLEANUP_TIMEOUT));
+
+ if (signal_pending(current))
+ flush_signals(current);
+ } else {
+ cmd->scsi_cmd->result = (DID_ABORT << 16);
+ }
+ cmd->conn->sess->num_active_cmds--;
+ list_del_init(&cmd->link);
+ cmd->scsi_cmd = NULL;
+ bnx2i_free_cmd(cmd->conn->sess, cmd);
+
+cmd_not_active:
+ return SUCCESS;
+
+lack_of_resc:
+ return FAILED;
+}
+
+
+/*
+ * SCSI abort request handler.
+ */
+int bnx2i_abort(struct scsi_cmnd *sc)
+{
+ int reason;
+ struct bnx2i_cmd *cmd = (struct bnx2i_cmd *) sc->SCp.ptr;
+
+ if (unlikely(!cmd)) {
+ /* command already completed to scsi mid-layer */
+ printk(KERN_INFO "bnx2i_abort: sc 0x%p, not active\n", sc);
+ return SUCCESS;
+ }
+
+ reason = bnx2i_initiate_abort_cmd(sc);
+ return reason;
+}
+
+
+
+/*
+ * hardware reset
+ */
+int bnx2i_reset(struct scsi_cmnd *sc)
+{
+ return 0;
+}
+
+
+void bnx2i_return_failed_command(struct bnx2i_sess *sess,
+ struct bnx2i_cmd *cmd, int err_code)
+{
+ struct scsi_cmnd *sc = cmd->scsi_cmd;
+ sc->result = err_code << 16;
+ sc->resid = cmd->scsi_cmd->request_bufflen;
+ cmd->scsi_cmd = NULL;
+ sess->num_active_cmds--;
+ sc->scsi_done(sc);
+}
+
+
+
+/*
+ * SCSI host reset handler - iSCSI session recovery
+ */
+int bnx2i_host_reset(struct scsi_cmnd *sc)
+{
+ struct Scsi_Host *shost = sc->device->host;
+ struct bnx2i_sess *sess = NULL;
+ int rc = 0;
+
+ shost = sc->device->host;
+ sess = iscsi_hostdata(shost->hostdata);
+ printk(KERN_INFO "bnx2i: attempting to reset host, #%d\n",
+ sess->host->host_no);
+
+ BUG_ON(shost != sess->host);
+ rc = bnx2i_do_iscsi_sess_recovery(sess, DID_RESET);
+
+ return rc;
+}
+
+
+
+/**********************************************************************
+ * open-iscsi interface
+ **********************************************************************/
+
+
+#define get_bnx2_device(_hba, _devc) do { \
+ if ((_hba->pci_did == PCI_DEVICE_ID_NX2_5706) || \
+ (_hba->pci_did == PCI_DEVICE_ID_NX2_5706S)) { \
+ _devc = '6'; \
+ } else if ((_hba->pci_did == PCI_DEVICE_ID_NX2_5708) || \
+ (_hba->pci_did == PCI_DEVICE_ID_NX2_5708S)) { \
+ _devc = '8'; \
+ } else if ((_hba->pci_did == PCI_DEVICE_ID_NX2_5709) || \
+ (_hba->pci_did == PCI_DEVICE_ID_NX2_5709S)) { \
+ _devc = '9'; \
+ } \
+ } while (0)
+
+/* from open-iscsi project */
+/*
+ * iSCSI Session's hostdata organization:
+ *
+ * *------------------* <== hostdata_session(host->hostdata)
+ * | ptr to class sess|
+ * |------------------| <== iscsi_hostdata(host->hostdata)
+ * | iscsi_session |
+ * *------------------*
+ */
+
+#define hostdata_privsize(_sz) (sizeof(unsigned long) + _sz + \
+ _sz % sizeof(unsigned long))
+
+#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
+
+#define session_to_cls(_sess) hostdata_session(_sess->host->hostdata)
+
+
+
+
+/*
+ * Function: bnx2i_register_xport
+ * Description: this routine will allocate memory for SCSI host template,
+ * iSCSI template and registers one instance of NX2 device with
+ * iSCSI Transport Kernel module.
+ */
+int bnx2i_register_xport(struct bnx2i_hba *hba)
+{
+ void *mem_ptr = NULL;
+ char dev_id = '8';
+
+ if (!hba)
+ return -EINVAL;
+
+ get_bnx2_device(hba, dev_id);
+
+ mem_ptr = kmalloc(sizeof(struct scsi_host_template), GFP_KERNEL);
+ hba->scsi_template = (struct scsi_host_template *) mem_ptr;
+ if (hba->scsi_template == NULL) {
+ printk(KERN_ALERT "bnx2i: failed to alloc memory for sht\n");
+ return -ENOMEM;
+ }
+
+ mem_ptr = kmalloc(sizeof(struct iscsi_transport), GFP_KERNEL);
+ hba->iscsi_transport = (struct iscsi_transport *) mem_ptr;
+ if (hba->iscsi_transport == NULL) {
+ printk(KERN_ALERT "mem error for iscsi_transport template\n");
+ goto iscsi_xport_err;
+ }
+
+ mem_ptr = kmalloc(BRCM_ISCSI_XPORT_NAME_SIZE_MAX, GFP_KERNEL);
+ if (mem_ptr == NULL) {
+ printk(KERN_ALERT "failed to alloc memory for xport name\n");
+ goto scsi_name_mem_err;
+ }
+
+ memcpy((void *) hba->scsi_template,
+ (const void *) &bnx2i_host_template,
+ sizeof(struct scsi_host_template));
+ hba->scsi_template->name = mem_ptr;
+ memcpy((void *) hba->scsi_template->name,
+ (const void *) bnx2i_host_template.name,
+ strlen(bnx2i_host_template.name) + 1);
+
+ mem_ptr = kmalloc(BRCM_ISCSI_XPORT_NAME_SIZE_MAX, GFP_KERNEL);
+ if (mem_ptr == NULL) {
+ printk(KERN_ALERT "failed to alloc proc name mem\n");
+ goto scsi_proc_name_mem_err;
+ }
+ hba->scsi_template->proc_name = mem_ptr;
+
+ memcpy((void *) hba->iscsi_transport,
+ (const void *) &bnx2i_iscsi_transport,
+ sizeof(struct iscsi_transport));
+
+ hba->iscsi_transport->host_template = hba->scsi_template;
+
+ mem_ptr = kmalloc(BRCM_ISCSI_XPORT_NAME_SIZE_MAX, GFP_KERNEL);
+ if (mem_ptr == NULL) {
+ printk(KERN_ALERT "mem alloc error, iscsi xport name\n");
+ goto xport_name_mem_err;
+ }
+ hba->iscsi_transport->name = mem_ptr;
+ sprintf(mem_ptr, "%s%c-%.2x%.2x%.2x", BRCM_ISCSI_XPORT_NAME_PREFIX,
+ dev_id, (u8)hba->pci_dev->bus->number,
+ hba->pci_devno, (u8)hba->pci_func);
+
+ memcpy((void *)hba->scsi_template->proc_name,
+ (const void *)mem_ptr, strlen(mem_ptr) + 1);
+
+ hba->shost_template = iscsi_register_transport(hba->iscsi_transport);
+ if (!hba->shost_template) {
+ printk(KERN_ALERT "bnx2i: xport reg failed, hba 0x%p\n", hba);
+ goto failed_registration;
+ }
+ printk(KERN_ALERT "bnx2i: netif=%s, iscsi=%s\n",
+ hba->netdev->name, hba->scsi_template->proc_name);
+ return 0;
+
+failed_registration:
+ kfree(hba->iscsi_transport->name);
+xport_name_mem_err:
+ kfree(hba->scsi_template->proc_name);
+scsi_proc_name_mem_err:
+ kfree(hba->scsi_template->name);
+scsi_name_mem_err:
+ kfree(hba->iscsi_transport);
+iscsi_xport_err:
+ kfree(hba->scsi_template);
+ printk(KERN_ALERT "register iscsi xport failed, hba 0x%p\n", hba);
+ return -ENOMEM;
+}
+
+
+/*
+ * Function: bnx2i_deregister_xport
+ * Description: this routine will de-allocate memory for SCSI host template,
+ * iSCSI template and de-registers a NX2 device instance
+ */
+int bnx2i_deregister_xport(struct bnx2i_hba *hba)
+{
+ if (!hba)
+ return -EINVAL;
+
+ iscsi_unregister_transport(hba->iscsi_transport);
+ hba->shost_template = NULL;
+
+ if (hba->scsi_template->name) {
+ kfree(hba->scsi_template->name);
+ hba->scsi_template->name = NULL;
+ }
+ if (hba->scsi_template) {
+ kfree(hba->scsi_template);
+ hba->scsi_template = NULL;
+ }
+ if (hba->iscsi_transport->name) {
+ kfree(hba->iscsi_transport->name);
+ hba->iscsi_transport->name = NULL;
+ }
+ if (hba->iscsi_transport) {
+ kfree(hba->iscsi_transport);
+ hba->iscsi_transport = NULL;
+ }
+ return 0;
+}
+
+
+/*
+ * Function: bnx2i_session_create
+ * Description: Creates a new iSCSI session instance on given device.
+ */
+struct iscsi_cls_session *
+ bnx2i_session_create(struct iscsi_transport *it,
+ struct scsi_transport_template *scsit,
+ uint16_t cmds_max, uint16_t qdepth,
+ uint32_t initial_cmdsn, uint32_t *host_no)
+{
+ struct bnx2i_hba *hba = NULL;
+ struct bnx2i_sess *sess = NULL;
+ struct Scsi_Host *shost;
+ struct iscsi_cls_session *cls_session;
+ int ret_code = 0;
+
+ hba = bnx2i_get_hba_from_template(scsit);
+ if (bnx2i_adapter_ready(hba))
+ return NULL;
+
+ shost = scsi_host_alloc(hba->iscsi_transport->host_template,
+ hostdata_privsize(sizeof(struct bnx2i_sess)));
+ if (!shost)
+ return NULL;
+
+ shost->max_id = 1;
+ shost->max_channel = 1;
+ shost->max_lun = hba->iscsi_transport->max_lun;
+ shost->max_cmd_len = hba->iscsi_transport->max_cmd_len;
+ if (cmds_max)
+ shost->can_queue = cmds_max;
+ if (qdepth)
+ shost->cmd_per_lun = qdepth;
+ shost->transportt = scsit;
+ *host_no = shost->host_no;
+ sess = iscsi_hostdata(shost->hostdata);
+
+ if (!sess)
+ goto sess_resc_fail;
+
+ memset(sess, 0, sizeof(struct bnx2i_sess));
+ sess->hba = hba;
+ sess->host = shost;
+
+ /*
+ * For Open-iSCSI, only normal sessions go through bnx2i.
+ * Discovery session goes through host stack TCP/IP stack.
+ */
+ ret_code = bnx2i_iscsi_sess_new(hba, sess);
+ if (ret_code) {
+ /*
+ * failed to allocate memory
+ */
+ printk(KERN_ALERT "bnx2i_sess_create: unable to alloc sess\n");
+ goto sess_resc_fail;
+ }
+
+ /*
+ * Update CmdSN related parameters
+ */
+ sess->cmdsn = initial_cmdsn;
+ sess->exp_cmdsn = initial_cmdsn + 1;
+ sess->max_cmdsn = initial_cmdsn + 1;
+
+ if (scsi_add_host(shost, NULL))
+ goto add_sh_fail;
+
+ if (!try_module_get(it->owner))
+ goto cls_sess_falied;
+
+ cls_session = iscsi_create_session(shost, it, 0);
+ if (!cls_session)
+ goto module_put;
+ *(unsigned long *)shost->hostdata = (unsigned long)cls_session;
+
+ return hostdata_session(shost->hostdata);
+
+module_put:
+ module_put(it->owner);
+cls_sess_falied:
+ scsi_remove_host(shost);
+add_sh_fail:
+ bnx2i_iscsi_sess_release(hba, sess);
+sess_resc_fail:
+ scsi_host_put(shost);
+ return NULL;
+}
+
+
+/*
+ * Function: bnx2i_session_destroy
+ * Description: Destroys previously created iSCSI session instance.
+ */
+void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
+{
+ struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+ struct bnx2i_sess *sess = iscsi_hostdata(shost->hostdata);
+ struct module *owner = cls_session->transport->owner;
+
+ if (sess) {
+ bnx2i_iscsi_sess_release(sess->hba, sess);
+ }
+
+ if (sess->target_name) {
+ kfree(sess->target_name);
+ sess->target_name = NULL;
+ }
+
+ scsi_remove_host(shost);
+ iscsi_destroy_session(cls_session);
+ scsi_host_put(shost);
+ module_put(owner);
+}
+
+
+/*
+ * Function: bnx2i_sess_recovery_timeo
+ * Description: session recovery timeout handling routine
+ */
+void bnx2i_sess_recovery_timeo(struct iscsi_cls_session *cls_session)
+{
+ struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+ struct bnx2i_sess *sess = iscsi_hostdata(shost->hostdata);
+
+ sess->recovery_state |= ISCSI_SESS_RECOVERY_FAILED;
+ if (sess->state != BNX2I_SESS_IN_FFP) {
+ }
+ wake_up(&sess->er_wait);
+}
+
+
+/*
+ * Function: bnx2i_conn_create
+ * Description: Creates a new iSCSI connection instance for a given session
+ */
+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_sess *sess = iscsi_hostdata(shost->hostdata);
+ struct bnx2i_conn *conn;
+ struct iscsi_cls_conn *cls_conn;
+
+ cls_conn = iscsi_create_conn(cls_session, cid);
+ if (!cls_conn)
+ return NULL;
+
+ conn = cls_conn->dd_data;
+ memset(conn, 0, sizeof(struct bnx2i_conn));
+ conn->cls_conn = cls_conn;
+ conn->exp_statsn = STATSN_UPDATE_SIGNATURE;
+ conn->iscsi_conn_cid = conn->fw_cid = 0;
+ conn->header_digest_en = 0;
+ conn->data_digest_en = 0;
+ conn->persist_address = NULL;
+ conn->state = CONN_STATE_IDLE;
+ /*
+ * Initialize the connection structure
+ */
+ bnx2i_iscsi_conn_new(sess, conn);
+ conn->conn_cid = cid;
+ return cls_conn;
+}
+
+
+
+/*
+ * Function: bnx2i_conn_bind
+ * Description: Binds together iSCSI session instance, iSCSI connection
+ * instance and the TCP connection. If TCP connection does not belong
+ * on the device iSCSI sess/conn is bound, return failure to user.
+ */
+int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
+ struct iscsi_cls_conn *cls_conn,
+ uint64_t transport_fd, int is_leading)
+{
+ struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+ struct bnx2i_sess *sess = iscsi_hostdata(shost->hostdata);
+ struct bnx2i_conn *tmp = ERR_PTR(-EEXIST);
+ struct bnx2i_conn *conn = cls_conn->dd_data;
+ int ret_code = 0;
+ struct bnx2i_endpoint *ep;
+
+ ep = (struct bnx2i_endpoint *) (unsigned long) transport_fd;
+
+ if (ep->state == EP_STATE_PEER_DISCONN) {
+ /* Peer disconnect via' FIN or RST */
+ return -EINVAL;
+ }
+
+ if (ep->hba != sess->hba) {
+ /* Error - TCP connection does not belong to this device
+ */
+ printk(KERN_ALERT "bnx2i: conn bind, ep=0x%p (0x%p) does not",
+ ep, ep->hba);
+ printk(KERN_ALERT "belong to hba 0x%p\n", sess->hba);
+ return -EEXIST;
+ }
+ if (!conn->gen_pdu.cmd)
+ conn->gen_pdu.cmd = bnx2i_alloc_cmd(sess);
+
+ /* look-up for existing connection, MC/S is not currently supported */
+ spin_lock_bh(&sess->lock);
+ tmp = NULL;
+ if (!list_empty(&sess->conn_list)) {
+ list_for_each_entry(tmp, &sess->conn_list, link) {
+ if (tmp == conn) {
+ break;
+ }
+ }
+ }
+ if ((tmp != conn) && (conn->sess == sess)) {
+ /* bind iSCSI connection to this session */
+ list_add(&conn->link, &sess->conn_list);
+ if (is_leading) {
+ sess->lead_conn = conn;
+ }
+ }
+
+ conn->ep = (struct bnx2i_endpoint *) (unsigned long) transport_fd;
+ conn->ep->conn = conn;
+ conn->ep->sess = sess;
+ conn->state = CONN_STATE_XPORT_READY;
+ conn->iscsi_conn_cid = conn->ep->ep_iscsi_cid;
+ conn->fw_cid = conn->ep->ep_cid;
+
+ bnx2i_bind_conn_to_iscsi_cid(conn, ep->ep_iscsi_cid);
+
+ spin_unlock_bh(&sess->lock);
+ return ret_code;
+}
+
+
+/*
+ * Function: bnx2i_conn_destroy
+ * Description: Destroys a iSCSI connection instance.
+ */
+void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
+{
+ struct bnx2i_conn *conn = cls_conn->dd_data;
+
+ bnx2i_conn_free_login_resources(conn->sess->hba, conn);
+
+ if (conn->persist_address) {
+ kfree(conn->persist_address);
+ conn->persist_address = NULL;
+ }
+ iscsi_destroy_conn(cls_conn);
+}
+
+
+/*
+ * Function: bnx2i_conn_set_param
+ * Description: During FFP migration, user daemon will issue this call to
+ * update negotiated iSCSI parameters to driver.
+ */
+int bnx2i_conn_set_param(struct iscsi_cls_conn *cls_conn,
+ enum iscsi_param param, char *buf, int buflen)
+{
+ struct bnx2i_conn *conn = cls_conn->dd_data;
+ struct bnx2i_sess *sess = conn->sess;
+
+ spin_lock_bh(&sess->lock);
+ if (conn->state != CONN_STATE_IN_LOGIN) {
+ printk(KERN_ERR "bnx2i: can't change param [%d]\n", param);
+ spin_unlock_bh(&sess->lock);
+ return 0;
+ }
+ spin_unlock_bh(&sess->lock);
+ switch (param) {
+ case ISCSI_PARAM_MAX_RECV_DLENGTH:
+ sscanf(buf, "%d", &conn->max_data_seg_len_recv);
+ break;
+ case ISCSI_PARAM_MAX_XMIT_DLENGTH:
+ sscanf(buf, "%d", &conn->max_data_seg_len_xmit);
+ break;
+ case ISCSI_PARAM_HDRDGST_EN:
+ sscanf(buf, "%d", &conn->header_digest_en);
+ break;
+ case ISCSI_PARAM_DATADGST_EN:
+ sscanf(buf, "%d", &conn->data_digest_en);
+ break;
+ case ISCSI_PARAM_INITIAL_R2T_EN:
+ if (conn == sess->lead_conn) {
+ sscanf(buf, "%d", &sess->initial_r2t);
+ }
+ break;
+ case ISCSI_PARAM_MAX_R2T:
+ if (conn == sess->lead_conn) {
+ sscanf(buf, "%d", &sess->max_r2t);
+ }
+ break;
+ case ISCSI_PARAM_IMM_DATA_EN:
+ if (conn == sess->lead_conn) {
+ sscanf(buf, "%d", &sess->imm_data);
+ }
+ break;
+ case ISCSI_PARAM_FIRST_BURST:
+ if (conn == sess->lead_conn) {
+ sscanf(buf, "%d", &sess->first_burst_len);
+ }
+ break;
+ case ISCSI_PARAM_MAX_BURST:
+ if (conn == sess->lead_conn) {
+ sscanf(buf, "%d", &sess->max_burst_len);
+ }
+ break;
+ case ISCSI_PARAM_PDU_INORDER_EN:
+ if (conn == sess->lead_conn) {
+ sscanf(buf, "%d", &sess->pdu_inorder);
+ }
+ break;
+ case ISCSI_PARAM_DATASEQ_INORDER_EN:
+ if (conn == sess->lead_conn) {
+ sscanf(buf, "%d", &sess->dataseq_inorder);
+ }
+ break;
+ case ISCSI_PARAM_ERL:
+ if (conn == sess->lead_conn) {
+ sscanf(buf, "%d", &sess->erl);
+ }
+ break;
+ case ISCSI_PARAM_IFMARKER_EN:
+ sscanf(buf, "%d", &conn->ifmarker_enable);
+ BUG_ON(conn->ifmarker_enable);
+ break;
+ case ISCSI_PARAM_OFMARKER_EN:
+ sscanf(buf, "%d", &conn->ofmarker_enable);
+ BUG_ON(conn->ofmarker_enable);
+ break;
+ case ISCSI_PARAM_EXP_STATSN:
+ sscanf(buf, "%u", &conn->exp_statsn);
+ break;
+ case ISCSI_PARAM_TARGET_NAME:
+ if (sess->target_name)
+ break;
+ sess->target_name = kstrdup(buf, GFP_KERNEL);
+ if (!sess->target_name)
+ return -ENOMEM;
+ break;
+ case ISCSI_PARAM_TPGT:
+ sscanf(buf, "%d", &sess->tgt_prtl_grp);
+ break;
+ case ISCSI_PARAM_PERSISTENT_PORT:
+ {
+ sscanf(buf, "%d", &conn->persist_port);
+ }
+ break;
+ case ISCSI_PARAM_PERSISTENT_ADDRESS:
+ if (conn->persist_address)
+ break;
+ conn->persist_address = kstrdup(buf, GFP_KERNEL);
+ if (!conn->persist_address)
+ return -ENOMEM;
+ break;
+ default:
+ printk(KERN_ALERT "PARAM_UNKNOWN: 0x%x\n", param);
+ break;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Function: bnx2i_conn_get_param
+ * Description: Call to retrieve iSCSI connection parameters
+ */
+int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
+ enum iscsi_param param, char *buf)
+{
+ struct bnx2i_conn *conn;
+ int len = 0;
+
+ if (!cls_conn)
+ return -EINVAL;
+ conn = (struct bnx2i_conn *)cls_conn->dd_data;
+ if (!conn || !conn->ep ||
+ (conn->ep->state != EP_STATE_ULP_UPDATE_COMPL))
+ return -EINVAL;
+
+ switch (param) {
+ case ISCSI_PARAM_MAX_RECV_DLENGTH:
+ len = sprintf(buf, "%u\n", conn->max_data_seg_len_recv);
+ break;
+ case ISCSI_PARAM_MAX_XMIT_DLENGTH:
+ len = sprintf(buf, "%u\n", conn->max_data_seg_len_xmit);
+ break;
+ case ISCSI_PARAM_HDRDGST_EN:
+ len = sprintf(buf, "%d\n", conn->header_digest_en);
+ break;
+ case ISCSI_PARAM_DATADGST_EN:
+ len = sprintf(buf, "%d\n", conn->data_digest_en);
+ break;
+ case ISCSI_PARAM_IFMARKER_EN:
+ len = sprintf(buf, "%u\n", conn->ifmarker_enable);
+ break;
+ case ISCSI_PARAM_OFMARKER_EN:
+ len = sprintf(buf, "%u\n", conn->ofmarker_enable);
+ break;
+ case ISCSI_PARAM_EXP_STATSN:
+ len = sprintf(buf, "%u\n", conn->exp_statsn);
+ break;
+ case ISCSI_PARAM_PERSISTENT_PORT:
+ len = sprintf(buf, "%d\n", conn->persist_port);
+ break;
+ case ISCSI_PARAM_PERSISTENT_ADDRESS:
+ if (conn->persist_address) {
+ len = sprintf(buf, "%s\n", conn->persist_address);
+ }
+ break;
+ case ISCSI_PARAM_CONN_PORT:
+ len = sprintf(buf, "%hu\n", conn->ep->cm_sk->dst_port);
+ break;
+ case ISCSI_PARAM_CONN_ADDRESS:
+ len = sprintf(buf, NIPQUAD_FMT "\n",
+ NIPQUAD(conn->ep->cm_sk->dst_ip));
+ break;
+ default:
+ printk(KERN_ALERT "get_param: conn 0x%p param %d not found\n",
+ conn, (u32)param);
+ return -ENOSYS;
+ }
+
+ return len;
+}
+
+
+/*
+ * Function: bnx2i_session_get_param
+ * Description: Call to obtain iSCSI session parameters
+ */
+int bnx2i_session_get_param(struct iscsi_cls_session *cls_session,
+ enum iscsi_param param, char *buf)
+{
+ struct Scsi_Host *shost = NULL;
+ struct bnx2i_sess *sess = NULL;
+ int len = 0;
+
+ if (!cls_session)
+ return -EINVAL;
+
+ shost = iscsi_session_to_shost(cls_session);
+ sess = iscsi_hostdata(shost->hostdata);
+ if (!sess || !sess->lead_conn)
+ return -EINVAL;
+
+ switch (param) {
+ case ISCSI_PARAM_INITIAL_R2T_EN:
+ len = sprintf(buf, "%d\n", sess->initial_r2t);
+ break;
+ case ISCSI_PARAM_MAX_R2T:
+ len = sprintf(buf, "%hu\n", sess->max_r2t);
+ break;
+ case ISCSI_PARAM_IMM_DATA_EN:
+ len = sprintf(buf, "%d\n", sess->imm_data);
+ break;
+ case ISCSI_PARAM_FIRST_BURST:
+ len = sprintf(buf, "%u\n", sess->first_burst_len);
+ break;
+ case ISCSI_PARAM_MAX_BURST:
+ len = sprintf(buf, "%u\n", sess->max_burst_len);
+ break;
+ case ISCSI_PARAM_PDU_INORDER_EN:
+ len = sprintf(buf, "%d\n", sess->pdu_inorder);
+ break;
+ case ISCSI_PARAM_DATASEQ_INORDER_EN:
+ len = sprintf(buf, "%d\n", sess->dataseq_inorder);
+ break;
+ case ISCSI_PARAM_ERL:
+ len = sprintf(buf, "%d\n", sess->erl);
+ break;
+ case ISCSI_PARAM_TARGET_NAME:
+ if (sess->target_name) {
+ len = sprintf(buf, "%s\n", sess->target_name);
+ }
+ break;
+ case ISCSI_PARAM_TPGT:
+ len = sprintf(buf, "%d\n", sess->tgt_prtl_grp);
+ break;
+ default:
+ printk(KERN_ALERT "sess_get_param: sess 0x%p", sess);
+ printk(KERN_ALERT "param (0x%x) not found\n", (u32) param);
+ return -ENOSYS;
+ }
+
+ return len;
+}
+
+
+/*
+ * Function: bnx2i_conn_start
+ * Description: last call in FFP migration to handover iscsi conn to the driver
+ */
+int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
+{
+ struct bnx2i_conn *conn = (struct bnx2i_conn *) cls_conn->dd_data;
+ struct bnx2i_sess *sess = conn->sess;
+
+ if (conn->state != CONN_STATE_IN_LOGIN) {
+ printk(KERN_ALERT "conn_start: conn 0x%p state 0x%x err!!\n",
+ conn, conn->state);
+ return -EINVAL;
+ }
+
+ if (!sess->initial_r2t) {
+ if (sess->first_burst_len > sess->max_burst_len)
+ return -EINVAL;
+ } else if (conn->max_data_seg_len_xmit > sess->max_burst_len) {
+ if (sess->first_burst_len > sess->max_burst_len)
+ return -EINVAL;
+ /* don't bother if only immediate data is supported and
+ * FBL & MBL are greater than MRDSL. In that case initiator
+ * will always send MRDSL worth of immediate data
+ */
+ }
+
+ conn->state = CONN_STATE_FFP_STATE;
+ if (conn->sess->lead_conn == conn) {
+ conn->sess->state = BNX2I_SESS_IN_FFP;
+ }
+
+ conn->ep->state = EP_STATE_ULP_UPDATE_START;
+ bnx2i_update_iscsi_conn(conn);
+
+ conn->ep->ofld_timer.expires = 10*HZ + jiffies;
+ conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
+ conn->ep->ofld_timer.data = (unsigned long)conn->ep;
+ add_timer(&conn->ep->ofld_timer);
+ /* update iSCSI context for this conn, wait for CNIC to complete */
+ wait_event_interruptible(conn->ep->ofld_wait,
+ conn->ep->state != EP_STATE_ULP_UPDATE_START);
+
+ if (signal_pending(current))
+ flush_signals(current);
+ del_timer_sync(&conn->ep->ofld_timer);
+ if (conn->ep->state != EP_STATE_ULP_UPDATE_COMPL) {
+ /* should never happen */
+ }
+ /* Free login ITT, not required anymore */
+ if (conn->gen_pdu.cmd) {
+ bnx2i_free_cmd(conn->sess, conn->gen_pdu.cmd);
+ conn->gen_pdu.cmd = NULL;
+ }
+
+ switch (conn->stop_state) {
+ case STOP_CONN_RECOVER:
+ sess->recovery_state = ISCSI_SESS_RECOVERY_COMPLETE;
+ conn->sess->state = BNX2I_SESS_IN_FFP;
+ iscsi_unblock_session(session_to_cls(sess));
+ wake_up(&sess->er_wait);
+ break;
+ case STOP_CONN_TERM:
+ break;
+ default:
+ ;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Function: bnx2i_conn_stop
+ * Description: call to take control of iscsi conn from the driver.
+ * Could be called when login failed, when recovery is to be
+ * attempted or during connection teardown
+ */
+void bnx2i_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
+{
+ struct bnx2i_conn *conn = (struct bnx2i_conn *)cls_conn->dd_data;
+
+ conn->stop_state = flag;
+ iscsi_block_session(session_to_cls(conn->sess));
+
+ switch (flag) {
+ case STOP_CONN_RECOVER:
+ conn->sess->state = BNX2I_SESS_IN_RECOVERY;
+ break;
+ case STOP_CONN_TERM:
+ if (conn->sess && (conn->sess->state & BNX2I_SESS_IN_FFP)) {
+ conn->sess->state = BNX2I_SESS_IN_SHUTDOWN;
+ }
+ break;
+ default:
+ printk(KERN_ERR "bnx2i: invalid conn stop req %d\n", flag);
+ }
+
+ return;
+}
+
+
+/*
+ * Function: bnx2i_conn_send_pdu
+ * Description: To send iSCSI PDUs prepared by user daemon, only login, logout,
+ * nop-out pdu's should flow this path.
+ */
+int bnx2i_conn_send_pdu(struct iscsi_cls_conn *cls_conn,
+ struct iscsi_hdr *hdr, char *data,
+ uint32_t data_size)
+{
+ struct bnx2i_conn *conn = NULL;
+ struct iscsi_hdr *iscsi_hdr = (struct iscsi_hdr *) hdr;
+ struct bnx2i_cmd *cmnd = NULL;
+ uint32_t payload_size = 0;
+ int rc;
+ unsigned long flags;
+
+ if (!cls_conn) {
+ printk(KERN_ALERT "bnx2i_conn_send_pdu: NULL conn ptr. \n");
+ return -EIO;
+ }
+ conn = (struct bnx2i_conn *)cls_conn->dd_data;
+ if (!conn->gen_pdu.req_buf) {
+ printk(KERN_ALERT "send_pdu: login buf not allocated\n");
+ /* ERR - buffer not allocated, should not happen */
+ return -EIO;
+ }
+
+ if (conn->gen_pdu.cmd) {
+ if ((conn->state != CONN_STATE_XPORT_READY) &&
+ (conn->state != CONN_STATE_IN_LOGIN)) {
+ printk(KERN_ALERT "send_pdu: %d != XPORT_READY\n",
+ conn->state);
+ return -EPERM;
+ }
+ cmnd = conn->gen_pdu.cmd;
+ } else { /* could be NOPOUT or the LOGOUT request */
+ spin_lock_irqsave(conn->sess->host->host_lock, flags);
+ cmnd = bnx2i_alloc_cmd(conn->sess);
+ spin_unlock_irqrestore(conn->sess->host->host_lock, flags);
+
+ if (!cmnd) {
+ printk(KERN_ALERT "bnx2i: Error - cmd not allocated\n");
+ return -EIO;
+ }
+ }
+ memset(conn->gen_pdu.req_buf, 0, ISCSI_CONN_LOGIN_BUF_SIZE);
+ /* Login request, copy hdr & data to buffer in conn struct */
+ memcpy((void *) &conn->gen_pdu.pdu_hdr, (const void *) hdr,
+ sizeof(struct iscsi_hdr));
+
+ cmnd->iscsi_opcode = iscsi_hdr->opcode;
+ switch (iscsi_hdr->opcode & ISCSI_OPCODE_MASK) {
+ case ISCSI_OP_LOGIN:
+ if (conn->state == CONN_STATE_XPORT_READY)
+ conn->state = CONN_STATE_IN_LOGIN;
+ break;
+ case ISCSI_OP_LOGOUT:
+ conn->state = CONN_STATE_IN_LOGOUT;
+ conn->sess->state = BNX2I_SESS_IN_LOGOUT;
+ break;
+ case ISCSI_OP_NOOP_OUT:
+ break;
+ default:
+ ;
+ }
+
+ conn->gen_pdu.req_buf_size = data_size;
+ payload_size = (hdr->dlength[0] << 16) | (hdr->dlength[1] << 8) |
+ hdr->dlength[2];
+
+ if (data_size) {
+ memcpy((void *)conn->gen_pdu.req_buf, (const void *)data,
+ data_size);
+ conn->gen_pdu.req_wr_ptr =
+ conn->gen_pdu.req_buf + payload_size;
+ }
+ cmnd->conn = conn;
+ cmnd->scsi_cmd = NULL;
+ rc = bnx2i_iscsi_send_generic_request(cmnd);
+ return rc;
+}
+
+
+/*
+ * Function : bnx2i_conn_get_stats
+ * Description: Returns iSCSI stats
+ */
+void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
+ struct iscsi_stats *stats)
+{
+ struct bnx2i_conn *conn = (struct bnx2i_conn *) cls_conn->dd_data;
+
+ stats->txdata_octets = conn->total_data_octets_sent;
+ stats->rxdata_octets = conn->total_data_octets_rcvd;
+
+ stats->noptx_pdus = conn->num_nopin_pdus;
+ stats->scsicmd_pdus = conn->num_scsi_cmd_pdus;
+ stats->tmfcmd_pdus = conn->num_tmf_req_pdus;
+ stats->login_pdus = conn->num_login_req_pdus;
+ stats->text_pdus = 0;
+ stats->dataout_pdus = conn->num_dataout_pdus;
+ stats->logout_pdus = conn->num_logout_req_pdus;
+ stats->snack_pdus = 0;
+
+ stats->noprx_pdus = conn->num_nopout_pdus;
+ stats->scsirsp_pdus = conn->num_scsi_resp_pdus;
+ stats->tmfrsp_pdus = conn->num_tmf_resp_pdus;
+ stats->textrsp_pdus = 0;
+ stats->datain_pdus = conn->num_datain_pdus;
+ stats->logoutrsp_pdus = conn->num_logout_resp_pdus;
+ stats->r2t_pdus = conn->num_r2t_pdus;
+ stats->async_pdus = conn->num_async_pdus;
+ stats->rjt_pdus = conn->num_reject_pdus;
+
+ stats->digest_err = 0;
+ stats->timeout_err = 0;
+ stats->custom_length = 0;
+}
+
+
+
+/*
+ * Function : bnx2i_check_nx2_dev_busy
+ * Description: this routine unregister devices if there are no active conns
+ */
+static void bnx2i_check_nx2_dev_busy(void)
+{
+ if (bnx2i_num_free_ep == bnx2i_max_free_ep) {
+ bnx2i_unreg_dev_all();
+ msleep(2);
+ }
+}
+
+
+/*
+ * Function : bnx2i_ep_connect
+ * Description: this routine initiates the TCP/IP connection by invoking
+ * Option-2 interface with l5_core and the CNIC
+ */
+int bnx2i_ep_connect(struct sockaddr *dst_addr, int non_blocking,
+ uint64_t *ep_handle)
+{
+ u32 iscsi_cid = BNX2I_CID_RESERVED;
+ struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
+ struct bnx2i_endpoint *endpoint;
+ struct bnx2i_hba *hba = NULL;
+ struct cnic_dev *cnic = NULL;
+ struct cnic_dev *tmp_cnic = NULL;
+ struct bnx2i_hba *tmp_hba = NULL;
+ struct cnic_sockaddr saddr;
+ int rc = 0;
+ extern int bnx2i_reg_device;
+ extern struct bnx2i_hba *get_adapter_list_head(void);
+
+ /*
+ * check if the given destination can be reached through NX2 device
+ */
+
+ if ((!bnx2i_reg_device) &&
+ (bnx2i_num_free_ep == bnx2i_max_free_ep)) {
+ bnx2i_reg_dev_all();
+ }
+ tmp_hba = get_adapter_list_head();
+ if (tmp_hba && tmp_hba->cnic) {
+ tmp_cnic = tmp_hba->cnic;
+ cnic = tmp_cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
+ }
+ if (!cnic) {
+ printk(KERN_ALERT "bnx2i: ep_conn, can't connect using cnic\n");
+ rc = 0;
+ goto check_busy;
+ }
+ hba = bnx2i_find_hba_for_cnic(cnic);
+
+ if (bnx2i_adapter_ready(hba)) {
+ printk(KERN_ALERT "bnx2i: ep_conn, adapter not found\n");
+ rc = 0;
+ goto check_busy;
+ }
+ 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);
+ rc = 0;
+ goto check_busy;
+ }
+ endpoint = bnx2i_alloc_ep();
+ if (!endpoint) {
+ printk(KERN_ALERT "bnx2i: ep_conn, unable to alloc ep\n");
+ *ep_handle = (uint64_t) 0;
+ rc = -ENOMEM;
+ goto check_busy;
+ }
+
+ endpoint->ep_iscsi_cid = (u16)ISCSI_RESERVED_TAG;
+ iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
+ if (iscsi_cid == (u16) ISCSI_RESERVED_TAG) {
+ printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
+ rc = -ENOMEM;
+ goto iscsi_cid_err;
+ }
+ endpoint->hba = hba;
+ endpoint->hba_age = hba->age;
+
+ rc = bnx2i_alloc_qp_resc(hba, endpoint);
+ if (rc != 0) {
+ printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
+ rc = -ENOMEM;
+ goto qp_resc_err;
+ }
+
+ endpoint->ep_iscsi_cid = iscsi_cid;
+ endpoint->state = EP_STATE_OFLD_START;
+ bnx2i_ep_ofld_list_add(hba, endpoint);
+
+ bnx2i_send_conn_ofld_req(hba, endpoint);
+
+ init_timer(&endpoint->ofld_timer);
+ endpoint->ofld_timer.expires = 2 * HZ + jiffies;
+ endpoint->ofld_timer.function = bnx2i_ep_ofld_timer;
+ endpoint->ofld_timer.data = (unsigned long) endpoint;
+ add_timer(&endpoint->ofld_timer);
+ /* Wait for CNIC hardware to setup conn context and return 'cid' */
+ wait_event_interruptible(endpoint->ofld_wait,
+ endpoint->state != EP_STATE_OFLD_START);
+
+ if (signal_pending(current))
+ flush_signals(current);
+ del_timer_sync(&endpoint->ofld_timer);
+ list_del_init(&endpoint->link);
+
+ if (endpoint->state != EP_STATE_OFLD_COMPL) {
+ rc = -ENOSPC;
+ goto conn_failed;
+ }
+
+ rc = -EINVAL;
+ if (hba->reg_with_cnic)
+ rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, endpoint->ep_cid,
+ iscsi_cid, &endpoint->cm_sk, endpoint);
+ if (rc)
+ goto conn_failed;
+
+ memset(&saddr, 0, sizeof(saddr));
+ saddr.remote_addr.sin_addr.s_addr = desti->sin_addr.s_addr;
+ saddr.remote_addr.sin_port = desti->sin_port;
+ saddr.local_addr.sin_port = htons(endpoint->tcp_port);
+ endpoint->state = EP_STATE_CONNECT_START;
+ rc = -EINVAL;
+ if (hba->reg_with_cnic)
+ rc = cnic->cm_connect(endpoint->cm_sk, &saddr);
+ else
+ goto conn_failed;
+
+ if (rc)
+ goto release_ep;
+
+ bnx2i_map_ep_dbell_regs(endpoint);
+
+ *ep_handle = (uint64_t) (unsigned long) endpoint;
+ return 0;
+
+release_ep:
+ cnic->cm_destroy(endpoint->cm_sk);
+conn_failed:
+iscsi_cid_err:
+ bnx2i_free_qp_resc(hba, endpoint);
+qp_resc_err:
+ bnx2i_free_ep(endpoint);
+check_busy:
+ *ep_handle = (uint64_t) 0;
+ bnx2i_check_nx2_dev_busy();
+ return rc;
+}
+
+
+
+/*
+ * Function : bnx2i_ep_poll
+ * Description: polls for TCP connect request to complete
+ */
+int bnx2i_ep_poll(uint64_t ep_handle, int timeout_ms)
+{
+ struct bnx2i_endpoint *ep;
+ int rc = 0;
+ ep = (struct bnx2i_endpoint *) (unsigned long) ep_handle;
+
+ if (!ep) {
+ return -EINVAL;
+ }
+ if (ep->state == EP_STATE_IDLE) {
+ return -1;
+ }
+ if (ep->state == EP_STATE_CONNECT_COMPL) {
+ return 1;
+ }
+
+ rc = wait_event_interruptible_timeout(ep->ofld_wait,
+ (ep->state ==
+ EP_STATE_CONNECT_COMPL),
+ msecs_to_jiffies(timeout_ms));
+ if (!rc || (ep->state == EP_STATE_OFLD_FAILED)) {
+ rc = -1;
+ }
+
+ if (rc > 0) {
+ return 1;
+ } else if (!rc) {
+ return 0; /* timeout */
+ } else {
+ return rc;
+ }
+}
+
+
+/*
+ * Function : bnx2i_ep_disconnect
+ * Description: initiates TCP/IP connection teardown process
+ */
+void bnx2i_ep_disconnect(uint64_t ep_handle)
+{
+ struct bnx2i_endpoint *ep;
+ struct cnic_dev *cnic = NULL;
+ struct bnx2i_sess *sess = NULL;
+ int rc = 0;
+
+ ep = (struct bnx2i_endpoint *) (unsigned long) ep_handle;
+ if (!ep || (ep_handle == -1)) {
+ return;
+ }
+ if (ep->state == EP_STATE_IDLE) {
+ goto return_ep;
+ }
+ cnic = ep->hba->cnic;
+
+ if (ep->state == EP_STATE_PEER_DISCONN) {
+ ep->state = EP_STATE_DISCONN_COMPL;
+ goto peer_discon;
+ }
+
+ if (test_bit(ADAPTER_STATE_DOWN, &ep->hba->adapter_state)) {
+ goto free_resc;
+ }
+ if (ep->hba_age != ep->hba->age) {
+ goto dev_reset;
+ }
+
+ ep->state = EP_STATE_DISCONN_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);
+
+ if (ep->hba->reg_with_cnic)
+ cnic->cm_close(ep->cm_sk);
+ else
+ goto free_resc;
+
+ /* wait for option-2 conn teardown */
+ wait_event_interruptible(ep->ofld_wait,
+ ep->state != EP_STATE_DISCONN_START);
+
+ if (signal_pending(current))
+ flush_signals(current);
+ del_timer_sync(&ep->ofld_timer);
+
+peer_discon:
+ if (!ep->hba->reg_with_cnic)
+ goto free_resc;
+
+ rc = cnic->cm_destroy(ep->cm_sk);
+ 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(ep->hba, ep);
+
+ /* destroy iSCSI context, wait for it to complete */
+ bnx2i_send_conn_destroy(ep->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);
+ if (ep->state != EP_STATE_CLEANUP_CMPL) {
+ /* should never happen */
+ printk(KERN_ALERT "bnx2i - conn destroy failed\n");
+ }
+
+dev_reset:
+ bnx2i_flush_active_cmd_queue(ep->sess, DID_NO_CONNECT);
+
+free_resc:
+ bnx2i_free_qp_resc(ep->hba, ep);
+return_ep:
+ if (ep->conn && ep->conn->sess)
+ /* session recovery in progress */
+ sess = ep->conn->sess;
+ if (sess && (sess->state != BNX2I_SESS_IN_RECOVERY))
+ /* session logged out */
+ sess = NULL;
+
+ bnx2i_free_ep(ep);
+ if (sess) {
+ wake_up(&sess->er_wait);
+ }
+
+ bnx2i_check_nx2_dev_busy();
+ return;
+}
+
+
+
+
+/*
+ * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
+ * used while registering with the iSCSI trnaport module.
+ */
+struct scsi_host_template bnx2i_host_template = {
+ .module = THIS_MODULE,
+ .name = "Broadcom Offload iSCSI Initiator",
+ .queuecommand = bnx2i_queuecommand,
+ .eh_abort_handler = bnx2i_abort,
+ .eh_host_reset_handler = bnx2i_host_reset,
+ .bios_param = NULL,
+ .can_queue = 128,
+ .max_sectors = 256,
+ .this_id = -1,
+ .cmd_per_lun = 64,
+ .use_clustering = ENABLE_CLUSTERING,
+ .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
+ .proc_name = NULL
+ };
+
+
+
+struct iscsi_transport bnx2i_iscsi_transport = {
+ .owner = THIS_MODULE,
+ .name = "bnx2i",
+ .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T
+ | CAP_DATADGST,
+ .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,
+ .host_param_mask = 0,
+ .host_template = &bnx2i_host_template,
+ .sessiondata_size = sizeof(struct bnx2i_sess),
+ .conndata_size = sizeof(struct bnx2i_conn),
+ .max_conn = 1,
+ .max_cmd_len = 16,
+ .max_lun = 512,
+ .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 = bnx2i_conn_set_param,
+ .get_conn_param = bnx2i_conn_get_param,
+ .get_session_param = bnx2i_session_get_param,
+ .start_conn = bnx2i_conn_start,
+ .stop_conn = bnx2i_conn_stop,
+ .send_pdu = bnx2i_conn_send_pdu,
+ .get_stats = bnx2i_conn_get_stats,
+ /* iscsi host params */
+ .get_host_param = NULL,
+ .set_host_param = NULL,
+ /* 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 = bnx2i_sess_recovery_timeo
+};
diff --git a/drivers/scsi/bnx2i/bnx2i_sysfs.c b/drivers/scsi/bnx2i/bnx2i_sysfs.c
new file mode 100644
index 0000000..6bd6eba
--- /dev/null
+++ b/drivers/scsi/bnx2i/bnx2i_sysfs.c
@@ -0,0 +1,616 @@
+/* bnx2i_sysfs.c: Broadcom NetXtreme II iSCSI driver.
+ *
+ * Copyright (c) 2004, 2005, 2006 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Anil Veerabhadrappa (anilgv@...adcom.com)
+ */
+
+#include "bnx2i.h"
+
+#define BNX2I_SYSFS_VERSION 0x2
+
+static ssize_t bnx2i_show_mips_status(struct class_device *cdev, char *buf)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+ ssize_t len = 0;
+
+ bnx2i_read_mips_idle_counters(hba);
+
+ len = sprintf(buf, "%d\n%lu\n%d\n%llu\n%llu\n"
+ "%llu\n%llu\n%llu\n%llu\n%llu\n%llu\n",
+ BNX2I_SYSFS_VERSION, jiffies, HZ,
+ hba->mips_idle.cp_idle_count,
+ hba->mips_idle.txp_idle_count,
+ hba->mips_idle.txp_tdma_count,
+ hba->mips_idle.txp_ctx_count,
+ hba->mips_idle.txp_hdrq_count,
+ hba->mips_idle.tpat_idle_count,
+ hba->mips_idle.rxp_idle_count,
+ hba->mips_idle.com_idle_count);
+ return (len);
+}
+
+static ssize_t bnx2i_show_net_if_name(struct class_device *cdev, char *buf)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ return sprintf(buf, "%s\n", hba->netdev->name);
+}
+
+static ssize_t bnx2i_show_pci_bar(struct class_device *cdev, char *buf)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ return sprintf(buf, "0x%.8x\n",
+ (u32) pci_resource_start(hba->pci_dev, 0));
+}
+
+static ssize_t bnx2i_show_sq_info(struct class_device *cdev, char *buf)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ return sprintf(buf, "0x%x\n", hba->max_sqes);
+}
+
+static ssize_t bnx2i_set_sq_info(struct class_device *cdev,
+ const char *buf, size_t count)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+ u32 val;
+
+ if (sscanf(buf, " 0x%x ", &val) > 0) {
+ if ((val >= BNX2I_SQ_WQES_MIN) &&
+ (val <= BNX2I_SQ_WQES_MAX)) {
+ hba->max_sqes = val;
+ }
+ }
+ return count;
+}
+
+static ssize_t bnx2i_show_cq_info(struct class_device *cdev, char *buf)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ return sprintf(buf, "0x%x\n", hba->max_cqes);
+}
+
+static ssize_t bnx2i_set_cq_info(struct class_device *cdev,
+ const char *buf, size_t count)
+{
+ u32 val;
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ if (sscanf(buf, " 0x%x ", &val) > 0) {
+ if ((val >= BNX2I_CQ_WQES_MIN) &&
+ (val <= BNX2I_CQ_WQES_MAX)) {
+ hba->max_cqes = val;
+ }
+ }
+ return count;
+}
+
+static ssize_t bnx2i_show_rq_info(struct class_device *cdev, char *buf)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ return sprintf(buf, "0x%x\n", hba->max_rqes);
+}
+
+static ssize_t bnx2i_set_rq_info(struct class_device *cdev, const char *buf,
+ size_t count)
+{
+ u32 val;
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ if (sscanf(buf, " 0x%x ", &val) > 0) {
+ if ((val >= BNX2I_RQ_WQES_MIN) &&
+ (val <= BNX2I_RQ_WQES_MAX)) {
+ hba->max_rqes = val;
+ }
+ }
+ return count;
+}
+
+
+static ssize_t bnx2i_show_ccell_info(struct class_device *cdev, char *buf)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ return sprintf(buf, "0x%x\n", hba->num_ccell);
+}
+
+static ssize_t bnx2i_set_ccell_info(struct class_device *cdev,
+ const char *buf, size_t count)
+{
+ u32 val;
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ if (sscanf(buf, " 0x%x ", &val) > 0) {
+ if ((val >= BNX2I_CCELLS_MIN) &&
+ (val <= BNX2I_CCELLS_MAX)) {
+ hba->num_ccell = val;
+ }
+ }
+ return count;
+}
+
+
+static ssize_t bnx2i_read_pci_trigger_reg(struct class_device *cdev,
+ char *buf)
+{
+ u32 reg_val = 0;
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+#define PCI_EVENT_TRIGGER_REG 0xCAC /* DMA WCHAN STAT10 REG */
+ reg_val = readl(hba->cnic->regview + PCI_EVENT_TRIGGER_REG);
+ return sprintf(buf, "0x%x\n", reg_val);
+}
+
+
+static ssize_t bnx2i_get_iscsi_cntx_dump(struct class_device *cdev, char *buf)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+ unsigned int *ptr = (unsigned int *) hba->ctx_addr;
+ unsigned int *dst_ptr = (unsigned int *) buf;
+ int unit_sz = sizeof(unsigned int);
+#define SYSFS_BUF_SIZE 4096
+#define NUM_SYSFS_BUFS_PER_CTX 4
+
+ if (hba->ctx_read_cnt == NUM_SYSFS_BUFS_PER_CTX)
+ return 0;
+
+ ptr += (((hba->ctx_read_cnt % NUM_SYSFS_BUFS_PER_CTX) *
+ SYSFS_BUF_SIZE) / unit_sz);
+ hba->ctx_read_cnt++;
+ memcpy(dst_ptr, ptr, SYSFS_BUF_SIZE);
+
+ return SYSFS_BUF_SIZE;
+}
+
+static ssize_t bnx2i_select_iscsi_cntx_dump(struct class_device *cdev,
+ const char *buf, size_t count)
+{
+ u32 iscsi_cid;
+ int ret = 0;
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ if (sscanf(buf, " 0x%x ", &iscsi_cid) > 0) {
+ ret = bnx2i_select_ctx_dump_cid(hba, iscsi_cid);
+ }
+ if (!ret)
+ ret = count;
+ return ret;
+}
+
+static ssize_t bnx2i_get_active_iscsi_cid_list(struct class_device *cdev,
+ char *buf)
+{
+ u32 active_iscsi_cid[32];
+ u32 active_cid[32];
+ int num_cid = 0;
+ ssize_t total_len = 0;
+ char *cur_ptr = buf;
+ int i = 0;
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+ u32 num_ccell = hba->ctx_ccell_tasks & 0xFFFF;
+ u32 num_tasks_per_conn = hba->ctx_ccell_tasks >> 16;
+
+ if (!hba->ictx_poll_mode) {
+ num_cid = bnx2i_list_iscsi_cid(hba, active_iscsi_cid,
+ active_cid);
+ }
+ total_len += sprintf(cur_ptr, "0x%x\n", BNX2I_SYSFS_VERSION);
+ cur_ptr = buf + total_len;
+ total_len += sprintf(cur_ptr, "0x%x\n", num_ccell);
+ cur_ptr = buf + total_len;
+ total_len += sprintf(cur_ptr, "0x%x\n", num_tasks_per_conn);
+ if (hba->ictx_poll_mode) {
+ if (hba->ictx_poll_cid) {
+ cur_ptr = buf + total_len;
+ total_len += sprintf(cur_ptr, "0x%x, 0x%x\n",
+ hba->ictx_poll_iscsi_cid,
+ hba->ictx_poll_cid);
+ hba->ictx_poll_cid = hba->ictx_poll_iscsi_cid = 0;
+ }
+ } else {
+ for (i = 0; i < num_cid; i++) {
+ cur_ptr = buf + total_len;
+ total_len += sprintf(cur_ptr, "0x%x, 0x%x\n",
+ active_iscsi_cid[i],
+ active_cid[i]);
+ }
+ }
+ return total_len;
+}
+
+
+static ssize_t bnx2i_set_iscsi_cid_err_poll_mode(struct class_device *cdev,
+ const char *buf, size_t count)
+{
+ u32 poll_mode;
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+
+ if (sscanf(buf, "0x%x", &poll_mode) > 0) {
+ if (poll_mode)
+ hba->ictx_poll_mode = 1;
+ else
+ hba->ictx_poll_mode = 0;
+ }
+ return count;
+}
+
+
+static ssize_t bnx2i_get_qp_shmem_dump(struct class_device *cdev, char *buf)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+ int resi_len = hba->sq_cq_size -
+ (hba->sq_cq_rdp - hba->sq_cq_dump);
+
+ if (!hba->sq_cq_dump || !hba->sq_cq_rdp) {
+ return -EINVAL;
+ } else if ((hba->sq_cq_dump + hba->sq_cq_size) ==
+ hba->sq_cq_rdp) {
+ kfree(hba->sq_cq_dump);
+ hba->sq_cq_dump = hba->sq_cq_rdp = NULL;
+ return 0;
+ }
+
+ if (resi_len > SYSFS_BUF_SIZE) {
+ resi_len = SYSFS_BUF_SIZE;
+ }
+ memcpy(buf, hba->sq_cq_rdp, resi_len);
+ hba->sq_cq_rdp += resi_len;
+
+ return resi_len;
+}
+
+
+
+
+static void bnx2i_dup_cq_mem(struct bnx2i_hba *hba,
+ struct bnx2i_conn *conn, int count)
+{
+ struct cqe *cqe_s;
+ struct cqe *cqe_d;
+ int total_cnt = count;
+
+ if (conn->ep->qp.cq_cons_qe == conn->ep->qp.cq_virt)
+ cqe_s = conn->ep->qp.cq_last_qe;
+ else
+ cqe_s = conn->ep->qp.cq_cons_qe - 1;
+ cqe_d = (struct cqe *)hba->sq_cq_rdp;
+ while (count--) {
+ memcpy(cqe_d, cqe_s, sizeof(struct cqe));
+ if (cqe_s == conn->ep->qp.cq_virt) {
+ cqe_s = conn->ep->qp.cq_last_qe;
+ } else {
+ cqe_s--;
+ }
+ cqe_d++;
+ if ((cqe_d - (struct cqe *)hba->sq_cq_rdp) > total_cnt) {
+ printk(KERN_ALERT "bnx2i - SQ Dump: mem overflow\n");
+ break;
+ }
+ }
+}
+
+
+static int bnx2i_init_cq_dump(struct bnx2i_hba *hba, u32 iscsi_cid,
+ u32 count)
+{
+ struct bnx2i_conn *conn = NULL;
+ int cq_size = 0;
+
+ conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
+
+ if (!conn) {
+ printk(KERN_ALERT "CQ dump: cid #%x not valid\n",
+ iscsi_cid);
+ return -EPERM;
+ }
+
+ if (hba->sq_cq_dump)
+ return -EPERM;
+
+ cq_size = (conn->ep->qp.cq_last_qe - conn->ep->qp.cq_virt) + 1;
+
+ if (!count || (count > cq_size))
+ count = cq_size;
+
+ hba->sq_cq_size = count * sizeof(struct cqe);
+
+ if (!hba->sq_cq_size)
+ return -EINVAL;
+
+ hba->sq_cq_dump = kmalloc(hba->sq_cq_size, GFP_KERNEL);
+ if (!hba->sq_cq_dump)
+ return -ENOMEM;
+ hba->sq_cq_rdp = hba->sq_cq_dump;
+
+ bnx2i_dup_cq_mem(hba, conn, count);
+ return 0;
+}
+
+
+
+static void bnx2i_dup_sq_mem(struct bnx2i_hba *hba,
+ struct bnx2i_conn *conn, int count)
+{
+ struct sqe *sqe_s;
+ struct sqe *sqe_d;
+ int total_cnt = count;
+
+ if (conn->ep->qp.sq_prod_qe == conn->ep->qp.sq_virt)
+ sqe_s = conn->ep->qp.sq_last_qe;
+ else
+ sqe_s = conn->ep->qp.sq_prod_qe - 1;
+ sqe_d = (struct sqe *)hba->sq_cq_rdp;
+ while (count--) {
+ memcpy(sqe_d, sqe_s, sizeof(struct sqe));
+ if (sqe_s == conn->ep->qp.sq_virt) {
+ sqe_s = conn->ep->qp.sq_last_qe;
+ } else {
+ sqe_s--;
+ }
+ sqe_d++;
+ if ((sqe_d - (struct sqe *) hba->sq_cq_rdp) >
+ total_cnt) {
+ printk(KERN_ALERT "bnx2i - SQ Dump: mem overflow\n");
+ break;
+ }
+ }
+}
+
+
+static int bnx2i_init_sq_dump(struct bnx2i_hba *hba,
+ u32 iscsi_cid, u32 count)
+{
+ struct bnx2i_conn *conn = NULL;
+ int sq_size = 0;
+
+ conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
+
+ if (!conn) {
+ printk(KERN_ALERT "SQ dump: cid #%x not valid\n",
+ iscsi_cid);
+ return -EINVAL;
+ }
+
+ if (hba->sq_cq_dump)
+ return -EINVAL;
+
+ sq_size = (conn->ep->qp.sq_last_qe - conn->ep->qp.sq_virt) + 1;
+
+ if (!count || (count > sq_size))
+ count = sq_size;
+
+ hba->sq_cq_size = count * sizeof(struct sqe);
+
+ if (!hba->sq_cq_size)
+ return -EINVAL;
+
+ hba->sq_cq_dump = kmalloc(hba->sq_cq_size, GFP_KERNEL);
+ if (!hba->sq_cq_dump)
+ return -ENOMEM;
+ hba->sq_cq_rdp = hba->sq_cq_dump;
+
+ bnx2i_dup_sq_mem(hba, conn, count);
+ return 0;
+}
+
+static ssize_t bnx2i_setup_qp_shmem_dump(struct class_device *cdev,
+ const char *buf, size_t count)
+{
+ struct bnx2i_hba *hba =
+ container_of(cdev, struct bnx2i_hba, class_dev);
+ u32 iscsi_cid;
+ char queue[32];
+ ssize_t ret = count;
+ u32 num_count;
+
+
+ if (sscanf(buf, "%c%c,%d,%d", &queue[0], &queue[1],
+ &iscsi_cid, &num_count) > 0) {
+ if (!strncmp(queue, "SQ", 2)) {
+ ret = bnx2i_init_sq_dump(hba, iscsi_cid, num_count);
+ } else if (!strncmp(queue, "CQ", 2)) {
+ ret = bnx2i_init_cq_dump(hba, iscsi_cid, num_count);
+ } else {
+ ret = -EINVAL;
+ }
+ }
+ return ret;
+}
+
+
+static ssize_t bnx2i_read_tcp_portd_options(struct class_device *cdev,
+ char *buf)
+{
+ extern struct tcp_port_mngt bnx2i_tcp_port_tbl;
+ return sprintf(buf, "0x%x\n", bnx2i_tcp_port_tbl.num_required);
+}
+
+static ssize_t bnx2i_write_tcp_portd_results(struct class_device *cdev,
+ const char *buf, size_t count)
+{
+ extern struct tcp_port_mngt bnx2i_tcp_port_tbl;
+ u32 tcp_port, bind_stat;
+
+ if (!bnx2i_tcp_port_tbl.free_q)
+ return count;
+
+ if (sscanf(buf, "%d,%d", &tcp_port, &bind_stat) > 0) {
+ if (bind_stat && tcp_port) {
+ bnx2i_tcp_port_new_entry(tcp_port);
+ }
+ }
+ return count;
+}
+
+
+static CLASS_DEVICE_ATTR (mips_info, S_IRUGO,
+ bnx2i_show_mips_status, NULL);
+static CLASS_DEVICE_ATTR (net_if_name, S_IRUGO,
+ bnx2i_show_net_if_name, NULL);
+static CLASS_DEVICE_ATTR (pci_bar, S_IRUGO,
+ bnx2i_show_pci_bar, NULL);
+static CLASS_DEVICE_ATTR (sq_size, S_IRUGO | S_IWUSR,
+ bnx2i_show_sq_info, bnx2i_set_sq_info);
+static CLASS_DEVICE_ATTR (cq_size, S_IRUGO | S_IWUSR,
+ bnx2i_show_cq_info, bnx2i_set_cq_info);
+static CLASS_DEVICE_ATTR (rq_size, S_IRUGO | S_IWUSR,
+ bnx2i_show_rq_info, bnx2i_set_rq_info);
+static CLASS_DEVICE_ATTR (num_ccell, S_IRUGO | S_IWUSR,
+ bnx2i_show_ccell_info, bnx2i_set_ccell_info);
+static CLASS_DEVICE_ATTR (pci_trigger, S_IRUGO,
+ bnx2i_read_pci_trigger_reg, NULL);
+static CLASS_DEVICE_ATTR (ctx_dump, S_IRUGO | S_IWUSR,
+ bnx2i_get_iscsi_cntx_dump,
+ bnx2i_select_iscsi_cntx_dump);
+static CLASS_DEVICE_ATTR (cid_list, S_IRUGO | S_IWUSR,
+ bnx2i_get_active_iscsi_cid_list,
+ bnx2i_set_iscsi_cid_err_poll_mode);
+static CLASS_DEVICE_ATTR (qp_shmem_dump, S_IRUGO | S_IWUSR,
+ bnx2i_get_qp_shmem_dump,
+ bnx2i_setup_qp_shmem_dump);
+static CLASS_DEVICE_ATTR (port_bind, S_IRUGO | S_IWUSR,
+ bnx2i_read_tcp_portd_options,
+ bnx2i_write_tcp_portd_results);
+
+
+static struct class_device_attribute *bnx2i_class_attributes[] = {
+ &class_device_attr_mips_info,
+ &class_device_attr_net_if_name,
+ &class_device_attr_pci_bar,
+ &class_device_attr_sq_size,
+ &class_device_attr_cq_size,
+ &class_device_attr_rq_size,
+ &class_device_attr_num_ccell,
+ &class_device_attr_pci_trigger,
+ &class_device_attr_ctx_dump,
+ &class_device_attr_cid_list,
+ &class_device_attr_qp_shmem_dump,
+};
+
+static struct class_device_attribute *tcp_port_class_attributes[] = {
+ &class_device_attr_port_bind
+};
+
+static void bnx2i_sysfs_release(struct class_device *class_dev)
+{
+}
+
+struct class_device port_class_dev;
+
+
+static struct class bnx2i_class = {
+ .name = "bnx2i",
+ .release = bnx2i_sysfs_release,
+};
+
+
+
+static int bnx2i_register_port_class_dev(struct class_device *class_dev)
+{
+ char dev_name[BUS_ID_SIZE];
+ int ret;
+ int i;
+
+ class_dev->class = &bnx2i_class;
+ class_dev->class_data = class_dev;
+ snprintf(dev_name, BUS_ID_SIZE, "%s", "tcp_portd");
+ strlcpy(class_dev->class_id, dev_name, BUS_ID_SIZE);
+
+ ret = class_device_register(class_dev);
+ if (ret)
+ goto err;
+
+ for (i = 0; i < ARRAY_SIZE(tcp_port_class_attributes); ++i) {
+ ret = class_device_create_file(class_dev,
+ tcp_port_class_attributes[i]);
+ if (ret)
+ goto err_unregister;
+ }
+
+ return 0;
+
+err_unregister:
+ class_device_unregister(class_dev);
+err:
+ return ret;
+}
+
+
+int bnx2i_register_sysfs(struct bnx2i_hba *hba)
+{
+ struct class_device *class_dev = &hba->class_dev;
+ char dev_name[BUS_ID_SIZE];
+ int ret;
+ int i;
+
+ class_dev->class = &bnx2i_class;
+ class_dev->class_data = hba;
+ snprintf(dev_name, BUS_ID_SIZE, "%.2x:%.2x.%.1x",
+ hba->pci_dev->bus->number,
+ PCI_SLOT(hba->pci_dev->devfn),
+ PCI_FUNC(hba->pci_dev->devfn));
+ strlcpy(class_dev->class_id, dev_name, BUS_ID_SIZE);
+
+ ret = class_device_register(class_dev);
+ if (ret)
+ goto err;
+
+ for (i = 0; i < ARRAY_SIZE(bnx2i_class_attributes); ++i) {
+ ret = class_device_create_file(class_dev,
+ bnx2i_class_attributes[i]);
+ if (ret)
+ goto err_unregister;
+ }
+
+ return 0;
+
+err_unregister:
+ class_device_unregister(class_dev);
+err:
+ return ret;
+}
+
+void bnx2i_unregister_sysfs(struct bnx2i_hba *hba)
+{
+ class_device_unregister(&hba->class_dev);
+}
+
+int bnx2i_sysfs_setup(void)
+{
+ int ret;
+ ret = class_register(&bnx2i_class);
+
+ bnx2i_register_port_class_dev(&port_class_dev);
+ return ret;
+}
+
+void bnx2i_sysfs_cleanup(void)
+{
+ class_device_unregister(&port_class_dev);
+ class_unregister(&bnx2i_class);
+}
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