new file mode 100644
@@ -0,0 +1,719 @@
+/*
+ * Copyright (c) 2016 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define DRV_NAME "cxgbit"
+#define DRV_VERSION "1.0.0-ko"
+#define pr_fmt(fmt) DRV_NAME ": " fmt
+
+#include "cxgbit.h"
+
+#ifdef CONFIG_CHELSIO_T4_DCB
+#include <net/dcbevent.h>
+#include "cxgb4_dcb.h"
+#endif
+
+LIST_HEAD(cdev_list_head);
+/* cdev list lock */
+DEFINE_MUTEX(cdev_list_lock);
+
+void _cxgbit_free_cdev(struct kref *kref)
+{
+ struct cxgbit_device *cdev;
+
+ cdev = container_of(kref, struct cxgbit_device, kref);
+
+ kfree(cdev);
+}
+
+static void cxgbit_set_mdsl(struct cxgbit_device *cdev)
+{
+ struct cxgb4_lld_info *lldi = &cdev->lldi;
+ u32 mdsl;
+
+#define ULP2_MAX_PKT_LEN 16224
+#define ISCSI_PDU_NONPAYLOAD_LEN 312
+ mdsl = min_t(u32, lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN,
+ ULP2_MAX_PKT_LEN - ISCSI_PDU_NONPAYLOAD_LEN);
+ mdsl = min_t(u32, mdsl, 8192);
+ mdsl = min_t(u32, mdsl, (MAX_SKB_FRAGS - 1) * PAGE_SIZE);
+
+ cdev->mdsl = mdsl;
+}
+
+static void *cxgbit_uld_add(const struct cxgb4_lld_info *lldi)
+{
+ struct cxgbit_device *cdev;
+
+ if (is_t4(lldi->adapter_type))
+ return ERR_PTR(-ENODEV);
+
+ cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
+ if (!cdev)
+ return ERR_PTR(-ENOMEM);
+
+ kref_init(&cdev->kref);
+
+ cdev->lldi = *lldi;
+
+ cxgbit_set_mdsl(cdev);
+
+ cxgbit_ddp_init(cdev);
+
+ if (!test_bit(CDEV_DDP_ENABLE, &cdev->flags))
+ pr_info("cdev %s ddp init failed\n",
+ pci_name(lldi->pdev));
+
+ if (lldi->fw_vers >= 0x10d2b00)
+ set_bit(CDEV_ISO_ENABLE, &cdev->flags);
+
+ spin_lock_init(&cdev->cskq.lock);
+ INIT_LIST_HEAD(&cdev->cskq.list);
+
+ mutex_lock(&cdev_list_lock);
+ list_add_tail(&cdev->list, &cdev_list_head);
+ mutex_unlock(&cdev_list_lock);
+
+ pr_info("cdev %s added for iSCSI target transport\n",
+ pci_name(lldi->pdev));
+
+ return cdev;
+}
+
+static void cxgbit_close_conn(struct cxgbit_device *cdev)
+{
+ struct cxgbit_sock *csk;
+ struct sk_buff *skb;
+ bool wakeup_thread = false;
+
+ spin_lock_bh(&cdev->cskq.lock);
+ list_for_each_entry(csk, &cdev->cskq.list, list) {
+ skb = alloc_skb(0, GFP_ATOMIC);
+ if (!skb)
+ continue;
+
+ spin_lock_bh(&csk->rxq.lock);
+ __skb_queue_tail(&csk->rxq, skb);
+ if (skb_queue_len(&csk->rxq) == 1)
+ wakeup_thread = true;
+ spin_unlock_bh(&csk->rxq.lock);
+
+ if (wakeup_thread) {
+ wake_up(&csk->waitq);
+ wakeup_thread = false;
+ }
+ }
+ spin_unlock_bh(&cdev->cskq.lock);
+}
+
+static void cxgbit_detach_cdev(struct cxgbit_device *cdev)
+{
+ bool free_cdev = false;
+
+ spin_lock_bh(&cdev->cskq.lock);
+ if (list_empty(&cdev->cskq.list))
+ free_cdev = true;
+ spin_unlock_bh(&cdev->cskq.lock);
+
+ if (free_cdev) {
+ mutex_lock(&cdev_list_lock);
+ list_del(&cdev->list);
+ mutex_unlock(&cdev_list_lock);
+
+ cxgbit_put_cdev(cdev);
+ } else {
+ cxgbit_close_conn(cdev);
+ }
+}
+
+static int cxgbit_uld_state_change(void *handle, enum cxgb4_state state)
+{
+ struct cxgbit_device *cdev = handle;
+
+ switch (state) {
+ case CXGB4_STATE_UP:
+ set_bit(CDEV_STATE_UP, &cdev->flags);
+ pr_info("cdev %s state UP.\n", pci_name(cdev->lldi.pdev));
+ break;
+ case CXGB4_STATE_START_RECOVERY:
+ clear_bit(CDEV_STATE_UP, &cdev->flags);
+ cxgbit_close_conn(cdev);
+ pr_info("cdev %s state RECOVERY.\n", pci_name(cdev->lldi.pdev));
+ break;
+ case CXGB4_STATE_DOWN:
+ pr_info("cdev %s state DOWN.\n", pci_name(cdev->lldi.pdev));
+ break;
+ case CXGB4_STATE_DETACH:
+ clear_bit(CDEV_STATE_UP, &cdev->flags);
+ cxgbit_detach_cdev(cdev);
+ pr_info("cdev %s state DETACH.\n", pci_name(cdev->lldi.pdev));
+ break;
+ default:
+ pr_info("cdev %s unknown state %d.\n",
+ pci_name(cdev->lldi.pdev), state);
+ break;
+ }
+ return 0;
+}
+
+static void cxgbit_proc_ddp_status(unsigned int tid,
+ struct cpl_rx_data_ddp *cpl,
+ struct cxgbit_lro_pdu_cb *pdu_cb)
+{
+ unsigned int status = ntohl(cpl->ddpvld);
+
+ pdu_cb->flags |= PDUCBF_RX_STATUS;
+ pdu_cb->ddigest = ntohl(cpl->ulp_crc);
+ pdu_cb->pdulen = ntohs(cpl->len);
+
+ if (status & (1 << CPL_RX_ISCSI_DDP_STATUS_HCRC_SHIFT)) {
+ pr_info("tid 0x%x, status 0x%x, hcrc bad.\n", tid, status);
+ pdu_cb->flags |= PDUCBF_RX_HCRC_ERR;
+ }
+
+ if (status & (1 << CPL_RX_ISCSI_DDP_STATUS_DCRC_SHIFT)) {
+ pr_info("tid 0x%x, status 0x%x, dcrc bad.\n", tid, status);
+ pdu_cb->flags |= PDUCBF_RX_DCRC_ERR;
+ }
+
+ if (status & (1 << CPL_RX_ISCSI_DDP_STATUS_PAD_SHIFT))
+ pr_info("tid 0x%x, status 0x%x, pad bad.\n", tid, status);
+
+ if ((status & (1 << CPL_RX_ISCSI_DDP_STATUS_DDP_SHIFT)) &&
+ (!(pdu_cb->flags & PDUCBF_RX_DATA))) {
+ pdu_cb->flags |= PDUCBF_RX_DATA_DDPD;
+ }
+}
+
+static void cxgbit_lro_add_packet_rsp(struct sk_buff *skb, u8 op,
+ const __be64 *rsp)
+{
+ struct cxgbit_lro_cb *lro_cb = cxgbit_skb_lro_cb(skb);
+ struct cxgbit_lro_pdu_cb *pdu_cb = cxgbit_skb_lro_pdu_cb(skb,
+ lro_cb->pdu_cnt);
+ struct cpl_rx_iscsi_ddp *cpl = (struct cpl_rx_iscsi_ddp *)(rsp + 1);
+
+ cxgbit_proc_ddp_status(lro_cb->csk->tid, cpl, pdu_cb);
+
+ lro_cb->pdu_totallen += pdu_cb->pdulen;
+ lro_cb->pdu_cnt++;
+}
+
+static void
+cxgbit_copy_frags(struct sk_buff *skb, const struct pkt_gl *gl,
+ unsigned int offset)
+{
+ int skb_frag_index = skb_shinfo(skb)->nr_frags;
+ int i;
+
+ /* usually there's just one frag */
+ __skb_fill_page_desc(skb, skb_frag_index, gl->frags[0].page,
+ gl->frags[0].offset + offset,
+ gl->frags[0].size - offset);
+ for (i = 1; i < gl->nfrags; i++)
+ __skb_fill_page_desc(skb, skb_frag_index + i,
+ gl->frags[i].page,
+ gl->frags[i].offset,
+ gl->frags[i].size);
+ skb_shinfo(skb)->nr_frags += gl->nfrags;
+
+ /* get a reference to the last page, we don't own it */
+ get_page(gl->frags[gl->nfrags - 1].page);
+}
+
+static void cxgbit_lro_add_packet_gl(struct sk_buff *skb, u8 op,
+ const struct pkt_gl *gl)
+{
+ struct cxgbit_lro_cb *lro_cb = cxgbit_skb_lro_cb(skb);
+ struct cxgbit_lro_pdu_cb *pdu_cb = cxgbit_skb_lro_pdu_cb(skb,
+ lro_cb->pdu_cnt);
+ unsigned int offset;
+ unsigned int len;
+
+ if (op == CPL_ISCSI_HDR) {
+ struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)gl->va;
+
+ offset = sizeof(struct cpl_iscsi_hdr);
+ pdu_cb->flags |= PDUCBF_RX_HDR;
+ pdu_cb->seq = ntohl(cpl->seq);
+ len = ntohs(cpl->len);
+ pdu_cb->hdr = gl->va + offset;
+ pdu_cb->hlen = len;
+ } else {
+ struct cpl_iscsi_data *cpl = (struct cpl_iscsi_data *)gl->va;
+
+ offset = sizeof(struct cpl_iscsi_data);
+ pdu_cb->flags |= PDUCBF_RX_DATA;
+ len = ntohs(cpl->len);
+ pdu_cb->dlen = len;
+ pdu_cb->doffset = lro_cb->offset;
+ pdu_cb->nr_dfrags = gl->nfrags;
+ pdu_cb->dfrag_index = skb_shinfo(skb)->nr_frags;
+ }
+
+ cxgbit_copy_frags(skb, gl, offset);
+
+ pdu_cb->frags += gl->nfrags;
+ lro_cb->offset += len;
+ skb->len += len;
+ skb->data_len += len;
+ skb->truesize += len;
+}
+
+static struct
+sk_buff *cxgbit_lro_init_skb(struct cxgbit_sock *csk,
+ u8 op,
+ const struct pkt_gl *gl,
+ const __be64 *rsp,
+ struct napi_struct *napi)
+{
+ struct sk_buff *skb;
+ struct cxgbit_lro_cb *lro_cb;
+
+ skb = napi_alloc_skb(napi, LRO_SKB_MAX_HEADROOM);
+
+ if (unlikely(!skb))
+ return NULL;
+
+ memset(skb->data, 0, LRO_SKB_MAX_HEADROOM);
+
+ lro_cb = cxgbit_skb_lro_cb(skb);
+
+ cxgbit_get_csk(csk);
+
+ lro_cb->csk = csk;
+
+ return skb;
+}
+
+static void cxgbit_queue_lro_skb(struct cxgbit_sock *csk,
+ struct sk_buff *skb)
+{
+ bool wakeup_thread = false;
+
+ cxgbit_skcb_flags(skb) |= SKCBF_RX_LRO;
+
+ spin_lock(&csk->rxq.lock);
+ __skb_queue_tail(&csk->rxq, skb);
+ if (skb_queue_len(&csk->rxq) == 1)
+ wakeup_thread = true;
+ spin_unlock(&csk->rxq.lock);
+
+ if (wakeup_thread)
+ wake_up(&csk->waitq);
+}
+
+static void cxgbit_lro_flush(struct t4_lro_mgr *lro_mgr,
+ struct sk_buff *skb)
+{
+ struct cxgbit_lro_cb *lro_cb = cxgbit_skb_lro_cb(skb);
+ struct cxgbit_sock *csk = lro_cb->csk;
+
+ csk->lro_skb = NULL;
+
+ __skb_unlink(skb, &lro_mgr->lroq);
+ cxgbit_queue_lro_skb(csk, skb);
+
+ cxgbit_put_csk(csk);
+
+ lro_mgr->lro_pkts++;
+ lro_mgr->lro_session_cnt--;
+}
+
+static void cxgbit_uld_lro_flush(struct t4_lro_mgr *lro_mgr)
+{
+ struct sk_buff *skb;
+
+ while ((skb = skb_peek(&lro_mgr->lroq)))
+ cxgbit_lro_flush(lro_mgr, skb);
+}
+
+static int cxgbit_lro_receive(struct cxgbit_sock *csk, u8 op,
+ const __be64 *rsp,
+ const struct pkt_gl *gl,
+ struct t4_lro_mgr *lro_mgr,
+ struct napi_struct *napi)
+{
+ struct sk_buff *skb;
+ struct cxgbit_lro_cb *lro_cb;
+
+ if (!csk) {
+ pr_err("%s: csk NULL, op 0x%x.\n", __func__, op);
+ goto out;
+ }
+
+ if (csk->lro_skb)
+ goto add_packet;
+
+start_lro:
+ /* Did we reach the hash size limit */
+ if (lro_mgr->lro_session_cnt >= MAX_LRO_SESSIONS) {
+ cxgbit_uld_lro_flush(lro_mgr);
+ goto start_lro;
+ }
+
+ skb = cxgbit_lro_init_skb(csk, op, gl, rsp, napi);
+ if (unlikely(!skb))
+ goto out;
+
+ csk->lro_skb = skb;
+
+ __skb_queue_tail(&lro_mgr->lroq, skb);
+ lro_mgr->lro_session_cnt++;
+
+ /* continue to add the packet */
+add_packet:
+ skb = csk->lro_skb;
+ lro_cb = cxgbit_skb_lro_cb(skb);
+
+ /* Check if this packet can be aggregated */
+ if ((gl && ((skb_shinfo(skb)->nr_frags + gl->nfrags) >=
+ MAX_SKB_FRAGS ||
+ lro_cb->pdu_totallen >= LRO_FLUSH_TOTALLEN_MAX)) ||
+ /* lro_cb->pdu_cnt must be less than MAX_SKB_FRAGS */
+ lro_cb->pdu_cnt >= (MAX_SKB_FRAGS - 1)) {
+ cxgbit_lro_flush(lro_mgr, skb);
+ goto start_lro;
+ }
+
+ if (gl)
+ cxgbit_lro_add_packet_gl(skb, op, gl);
+ else
+ cxgbit_lro_add_packet_rsp(skb, op, rsp);
+ lro_mgr->lro_merged++;
+
+ return 0;
+
+out:
+ return -1;
+}
+
+static int cxgbit_uld_lro_rx_handler(void *hndl, const __be64 *rsp,
+ const struct pkt_gl *gl,
+ struct t4_lro_mgr *lro_mgr,
+ struct napi_struct *napi)
+{
+ struct cxgbit_device *cdev = hndl;
+ struct cxgb4_lld_info *lldi = &cdev->lldi;
+ struct cpl_tx_data *rpl = NULL;
+ struct cxgbit_sock *csk = NULL;
+ unsigned int tid = 0;
+ struct sk_buff *skb;
+ unsigned int op = *(u8 *)rsp;
+ bool lro_flush = true;
+
+ switch (op) {
+ case CPL_ISCSI_HDR:
+ case CPL_ISCSI_DATA:
+ case CPL_RX_ISCSI_DDP:
+ case CPL_FW4_ACK:
+ lro_flush = false;
+ case CPL_ABORT_RPL_RSS:
+ case CPL_PASS_ESTABLISH:
+ case CPL_PEER_CLOSE:
+ case CPL_CLOSE_CON_RPL:
+ case CPL_ABORT_REQ_RSS:
+ case CPL_SET_TCB_RPL:
+ case CPL_RX_DATA:
+ /* Get the TID of this connection */
+ rpl = gl ? (struct cpl_tx_data *)gl->va :
+ (struct cpl_tx_data *)(rsp + 1);
+ tid = GET_TID(rpl);
+ csk = lookup_tid(lldi->tids, tid);
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * Flush the LROed skb on receiving any cpl other than FW4_ACK and
+ * CPL_ISCSI_XXX
+ */
+ if (csk && csk->lro_skb && lro_flush)
+ cxgbit_lro_flush(lro_mgr, csk->lro_skb);
+
+ if (!gl) {
+ unsigned int len;
+
+ if (op == CPL_RX_ISCSI_DDP) {
+ if (!cxgbit_lro_receive(csk, op, rsp, NULL, lro_mgr,
+ napi))
+ return 0;
+ }
+
+ len = 64 - sizeof(struct rsp_ctrl) - 8;
+ skb = napi_alloc_skb(napi, len);
+ if (!skb)
+ goto nomem;
+ __skb_put(skb, len);
+ skb_copy_to_linear_data(skb, &rsp[1], len);
+ } else {
+ if (unlikely(op != *(u8 *)gl->va)) {
+ pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
+ gl->va, be64_to_cpu(*rsp),
+ be64_to_cpu(*(u64 *)gl->va),
+ gl->tot_len);
+ return 0;
+ }
+
+ if (op == CPL_ISCSI_HDR || op == CPL_ISCSI_DATA) {
+ if (!cxgbit_lro_receive(csk, op, rsp, gl, lro_mgr,
+ napi))
+ return 0;
+ }
+
+#define RX_PULL_LEN 128
+ skb = cxgb4_pktgl_to_skb(gl, RX_PULL_LEN, RX_PULL_LEN);
+ if (unlikely(!skb))
+ goto nomem;
+ }
+
+ rpl = (struct cpl_tx_data *)skb->data;
+ op = rpl->ot.opcode;
+ cxgbit_skcb_rx_opcode(skb) = op;
+
+ pr_debug("cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
+ cdev, op, rpl->ot.opcode_tid,
+ ntohl(rpl->ot.opcode_tid), skb);
+
+ if (op < NUM_CPL_CMDS && cxgbit_cplhandlers[op]) {
+ cxgbit_cplhandlers[op](cdev, skb);
+ } else {
+ pr_err("No handler for opcode 0x%x.\n", op);
+ __kfree_skb(skb);
+ }
+ return 0;
+nomem:
+ pr_err("%s OOM bailing out.\n", __func__);
+ return 1;
+}
+
+#ifdef CONFIG_CHELSIO_T4_DCB
+struct cxgbit_dcb_work {
+ struct dcb_app_type dcb_app;
+ struct work_struct work;
+};
+
+static struct cxgbit_device *
+cxgbit_find_device(struct net_device *ndev, u8 *port_id)
+{
+ struct cxgbit_device *cdev;
+ u8 i;
+
+ list_for_each_entry(cdev, &cdev_list_head, list) {
+ struct cxgb4_lld_info *lldi = &cdev->lldi;
+
+ for (i = 0; i < lldi->nports; i++) {
+ if (lldi->ports[i] == ndev) {
+ *port_id = i;
+ return cdev;
+ }
+ }
+ }
+
+ return NULL;
+}
+
+static void cxgbit_update_dcb_priority(struct cxgbit_device *cdev,
+ u8 port_id, u8 dcb_priority,
+ u16 port_num)
+{
+ struct cxgbit_sock *csk;
+ struct sk_buff *skb;
+ u16 local_port;
+ bool wakeup_thread = false;
+
+ spin_lock_bh(&cdev->cskq.lock);
+ list_for_each_entry(csk, &cdev->cskq.list, list) {
+ if (csk->port_id != port_id)
+ continue;
+
+ if (csk->com.local_addr.ss_family == AF_INET6) {
+ struct sockaddr_in6 *sock_in6;
+
+ sock_in6 = (struct sockaddr_in6 *)&csk->com.local_addr;
+ local_port = ntohs(sock_in6->sin6_port);
+ } else {
+ struct sockaddr_in *sock_in;
+
+ sock_in = (struct sockaddr_in *)&csk->com.local_addr;
+ local_port = ntohs(sock_in->sin_port);
+ }
+
+ if (local_port != port_num)
+ continue;
+
+ if (csk->dcb_priority == dcb_priority)
+ continue;
+
+ skb = alloc_skb(0, GFP_ATOMIC);
+ if (!skb)
+ continue;
+
+ spin_lock(&csk->rxq.lock);
+ __skb_queue_tail(&csk->rxq, skb);
+ if (skb_queue_len(&csk->rxq) == 1)
+ wakeup_thread = true;
+ spin_unlock(&csk->rxq.lock);
+
+ if (wakeup_thread) {
+ wake_up(&csk->waitq);
+ wakeup_thread = false;
+ }
+ }
+ spin_unlock_bh(&cdev->cskq.lock);
+}
+
+static void cxgbit_dcb_workfn(struct work_struct *work)
+{
+ struct cxgbit_dcb_work *dcb_work;
+ struct net_device *ndev;
+ struct cxgbit_device *cdev = NULL;
+ struct dcb_app_type *iscsi_app;
+ u8 priority, port_id = 0xff;
+
+ dcb_work = container_of(work, struct cxgbit_dcb_work, work);
+ iscsi_app = &dcb_work->dcb_app;
+
+ if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) {
+ if (iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY)
+ goto out;
+
+ priority = iscsi_app->app.priority;
+
+ } else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) {
+ if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM)
+ goto out;
+
+ if (!iscsi_app->app.priority)
+ goto out;
+
+ priority = ffs(iscsi_app->app.priority) - 1;
+ } else {
+ goto out;
+ }
+
+ pr_debug("priority for ifid %d is %u\n",
+ iscsi_app->ifindex, priority);
+
+ ndev = dev_get_by_index(&init_net, iscsi_app->ifindex);
+
+ if (!ndev)
+ goto out;
+
+ mutex_lock(&cdev_list_lock);
+ cdev = cxgbit_find_device(ndev, &port_id);
+
+ dev_put(ndev);
+
+ if (!cdev) {
+ mutex_unlock(&cdev_list_lock);
+ goto out;
+ }
+
+ cxgbit_update_dcb_priority(cdev, port_id, priority,
+ iscsi_app->app.protocol);
+ mutex_unlock(&cdev_list_lock);
+out:
+ kfree(dcb_work);
+}
+
+static int cxgbit_dcbevent_notify(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct cxgbit_dcb_work *dcb_work;
+ struct dcb_app_type *dcb_app = data;
+
+ dcb_work = kzalloc(sizeof(*dcb_work), GFP_ATOMIC);
+ if (!dcb_work)
+ return NOTIFY_DONE;
+
+ dcb_work->dcb_app = *dcb_app;
+ INIT_WORK(&dcb_work->work, cxgbit_dcb_workfn);
+ schedule_work(&dcb_work->work);
+ return NOTIFY_OK;
+}
+#endif
+
+static enum target_prot_op cxgbit_get_sup_prot_ops(struct iscsi_conn *conn)
+{
+ return TARGET_PROT_NORMAL;
+}
+
+static struct iscsit_transport cxgbit_transport = {
+ .name = DRV_NAME,
+ .transport_type = ISCSI_TCP_CXGB4,
+ .priv_size = sizeof(struct cxgbit_cmd),
+ .owner = THIS_MODULE,
+ .iscsit_setup_np = cxgbit_setup_np,
+ .iscsit_accept_np = cxgbit_accept_np,
+ .iscsit_free_np = cxgbit_free_np,
+ .iscsit_free_conn = cxgbit_free_conn,
+ .iscsit_get_login_rx = cxgbit_get_login_rx,
+ .iscsit_put_login_tx = cxgbit_put_login_tx,
+ .iscsit_immediate_queue = cxgbit_immediate_queue,
+ .iscsit_response_queue = cxgbit_response_queue,
+ .iscsit_get_dataout = iscsit_build_r2ts_for_cmd,
+ .iscsit_queue_data_in = iscsit_queue_rsp,
+ .iscsit_queue_status = iscsit_queue_rsp,
+ .iscsit_rx_pdu = cxgbit_rx_pdu,
+ .iscsit_validate_params = cxgbit_validate_params,
+ .iscsit_release_cmd = cxgbit_release_cmd,
+ .iscsit_aborted_task = iscsit_aborted_task,
+ .iscsit_get_sup_prot_ops = cxgbit_get_sup_prot_ops,
+};
+
+static struct cxgb4_uld_info cxgbit_uld_info = {
+ .name = DRV_NAME,
+ .add = cxgbit_uld_add,
+ .state_change = cxgbit_uld_state_change,
+ .lro_rx_handler = cxgbit_uld_lro_rx_handler,
+ .lro_flush = cxgbit_uld_lro_flush,
+};
+
+#ifdef CONFIG_CHELSIO_T4_DCB
+static struct notifier_block cxgbit_dcbevent_nb = {
+ .notifier_call = cxgbit_dcbevent_notify,
+};
+#endif
+
+static int __init cxgbit_init(void)
+{
+ cxgb4_register_uld(CXGB4_ULD_ISCSIT, &cxgbit_uld_info);
+ iscsit_register_transport(&cxgbit_transport);
+
+#ifdef CONFIG_CHELSIO_T4_DCB
+ pr_info("%s dcb enabled.\n", DRV_NAME);
+ register_dcbevent_notifier(&cxgbit_dcbevent_nb);
+#endif
+ return 0;
+}
+
+static void __exit cxgbit_exit(void)
+{
+ struct cxgbit_device *cdev, *tmp;
+
+#ifdef CONFIG_CHELSIO_T4_DCB
+ unregister_dcbevent_notifier(&cxgbit_dcbevent_nb);
+#endif
+ mutex_lock(&cdev_list_lock);
+ list_for_each_entry_safe(cdev, tmp, &cdev_list_head, list) {
+ list_del(&cdev->list);
+ cxgbit_put_cdev(cdev);
+ }
+ mutex_unlock(&cdev_list_lock);
+ iscsit_unregister_transport(&cxgbit_transport);
+ cxgb4_unregister_uld(CXGB4_ULD_ISCSIT);
+}
+
+module_init(cxgbit_init);
+module_exit(cxgbit_exit);
+
+MODULE_DESCRIPTION("Chelsio iSCSI target offload driver");
+MODULE_AUTHOR("Chelsio Communications");
+MODULE_VERSION(DRV_VERSION);
+MODULE_LICENSE("GPL");
This file contains code for registering with iscsi target transport and cxgb4 driver. Signed-off-by: Varun Prakash <varun@chelsio.com> --- drivers/target/iscsi/cxgbit/cxgbit_main.c | 719 ++++++++++++++++++++++++++++++ 1 file changed, 719 insertions(+) create mode 100644 drivers/target/iscsi/cxgbit/cxgbit_main.c