--- /dev/null
+/*
+ * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management
+ *
+ * Copyright (C) 2003-2008 Chelsio Communications. All rights reserved.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this
+ * release for licensing terms and conditions.
+ *
+ * Written by: Dimitris Michailidis (dm@chelsio.com)
+ * Karen Xie (kxie@chelsio.com)
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <scsi/scsi_host.h>
+
+#include "common.h"
+#include "t3_cpl.h"
+#include "t3cdev.h"
+#include "cxgb3_defs.h"
+#include "cxgb3_ctl_defs.h"
+#include "cxgb3_offload.h"
+#include "firmware_exports.h"
+#include "cxgb3i.h"
+
+static unsigned int dbg_level;
+#include "../libcxgbi.h"
+
+#define DRV_MODULE_NAME "cxgb3i"
+#define DRV_MODULE_DESC "Chelsio T3 iSCSI Driver"
+#define DRV_MODULE_VERSION "2.0.0"
+#define DRV_MODULE_RELDATE "Jun. 2010"
+
+static char version[] =
+ DRV_MODULE_DESC " " DRV_MODULE_NAME
+ " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
+
+MODULE_AUTHOR("Chelsio Communications, Inc.");
+MODULE_DESCRIPTION(DRV_MODULE_DESC);
+MODULE_VERSION(DRV_MODULE_VERSION);
+MODULE_LICENSE("GPL");
+
+module_param(dbg_level, uint, 0644);
+MODULE_PARM_DESC(dbg_level, "debug flag (default=0)");
+
+static int cxgb3i_rcv_win = 256 * 1024;
+module_param(cxgb3i_rcv_win, int, 0644);
+MODULE_PARM_DESC(cxgb3i_rcv_win, "TCP receive window in bytes (default=256KB)");
+
+static int cxgb3i_snd_win = 128 * 1024;
+module_param(cxgb3i_snd_win, int, 0644);
+MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)");
+
+static int cxgb3i_rx_credit_thres = 10 * 1024;
+module_param(cxgb3i_rx_credit_thres, int, 0644);
+MODULE_PARM_DESC(rx_credit_thres,
+ "RX credits return threshold in bytes (default=10KB)");
+
+static unsigned int cxgb3i_max_connect = 8 * 1024;
+module_param(cxgb3i_max_connect, uint, 0644);
+MODULE_PARM_DESC(cxgb3i_max_connect, "Max. # of connections (default=8092)");
+
+static unsigned int cxgb3i_sport_base = 20000;
+module_param(cxgb3i_sport_base, uint, 0644);
+MODULE_PARM_DESC(cxgb3i_sport_base, "starting port number (default=20000)");
+
+static void cxgb3i_dev_open(struct t3cdev *);
+static void cxgb3i_dev_close(struct t3cdev *);
+static void cxgb3i_dev_event_handler(struct t3cdev *, u32, u32);
+
+static struct cxgb3_client t3_client = {
+ .name = DRV_MODULE_NAME,
+ .handlers = cxgb3i_cpl_handlers,
+ .add = cxgb3i_dev_open,
+ .remove = cxgb3i_dev_close,
+ .event_handler = cxgb3i_dev_event_handler,
+};
+
+static struct scsi_host_template cxgb3i_host_template = {
+ .module = THIS_MODULE,
+ .name = DRV_MODULE_NAME,
+ .proc_name = DRV_MODULE_NAME,
+ .can_queue = CXGB3I_SCSI_HOST_QDEPTH,
+ .queuecommand = iscsi_queuecommand,
+ .change_queue_depth = scsi_change_queue_depth,
+ .sg_tablesize = SG_ALL,
+ .max_sectors = 0xFFFF,
+ .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
+ .eh_abort_handler = iscsi_eh_abort,
+ .eh_device_reset_handler = iscsi_eh_device_reset,
+ .eh_target_reset_handler = iscsi_eh_recover_target,
+ .target_alloc = iscsi_target_alloc,
+ .use_clustering = DISABLE_CLUSTERING,
+ .this_id = -1,
+ .track_queue_depth = 1,
+};
+
+static struct iscsi_transport cxgb3i_iscsi_transport = {
+ .owner = THIS_MODULE,
+ .name = DRV_MODULE_NAME,
+ /* owner and name should be set already */
+ .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST
+ | CAP_DATADGST | CAP_DIGEST_OFFLOAD |
+ CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
+ .attr_is_visible = cxgbi_attr_is_visible,
+ .get_host_param = cxgbi_get_host_param,
+ .set_host_param = cxgbi_set_host_param,
+ /* session management */
+ .create_session = cxgbi_create_session,
+ .destroy_session = cxgbi_destroy_session,
+ .get_session_param = iscsi_session_get_param,
+ /* connection management */
+ .create_conn = cxgbi_create_conn,
+ .bind_conn = cxgbi_bind_conn,
+ .destroy_conn = iscsi_tcp_conn_teardown,
+ .start_conn = iscsi_conn_start,
+ .stop_conn = iscsi_conn_stop,
+ .get_conn_param = iscsi_conn_get_param,
+ .set_param = cxgbi_set_conn_param,
+ .get_stats = cxgbi_get_conn_stats,
+ /* pdu xmit req from user space */
+ .send_pdu = iscsi_conn_send_pdu,
+ /* task */
+ .init_task = iscsi_tcp_task_init,
+ .xmit_task = iscsi_tcp_task_xmit,
+ .cleanup_task = cxgbi_cleanup_task,
+ /* pdu */
+ .alloc_pdu = cxgbi_conn_alloc_pdu,
+ .init_pdu = cxgbi_conn_init_pdu,
+ .xmit_pdu = cxgbi_conn_xmit_pdu,
+ .parse_pdu_itt = cxgbi_parse_pdu_itt,
+ /* TCP connect/disconnect */
+ .get_ep_param = cxgbi_get_ep_param,
+ .ep_connect = cxgbi_ep_connect,
+ .ep_poll = cxgbi_ep_poll,
+ .ep_disconnect = cxgbi_ep_disconnect,
+ /* Error recovery timeout call */
+ .session_recovery_timedout = iscsi_session_recovery_timedout,
+};
+
+static struct scsi_transport_template *cxgb3i_stt;
+
+/*
+ * CPL (Chelsio Protocol Language) defines a message passing interface between
+ * the host driver and Chelsio asic.
+ * The section below implments CPLs that related to iscsi tcp connection
+ * open/close/abort and data send/receive.
+ */
+
+static int push_tx_frames(struct cxgbi_sock *csk, int req_completion);
+
+static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
+ const struct l2t_entry *e)
+{
+ unsigned int wscale = cxgbi_sock_compute_wscale(cxgb3i_rcv_win);
+ struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head;
+
+ skb->priority = CPL_PRIORITY_SETUP;
+
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, csk->atid));
+ req->local_port = csk->saddr.sin_port;
+ req->peer_port = csk->daddr.sin_port;
+ req->local_ip = csk->saddr.sin_addr.s_addr;
+ req->peer_ip = csk->daddr.sin_addr.s_addr;
+
+ req->opt0h = htonl(V_KEEP_ALIVE(1) | F_TCAM_BYPASS |
+ V_WND_SCALE(wscale) | V_MSS_IDX(csk->mss_idx) |
+ V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx));
+ req->opt0l = htonl(V_ULP_MODE(ULP2_MODE_ISCSI) |
+ V_RCV_BUFSIZ(cxgb3i_rcv_win>>10));
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u, %pI4:%u-%pI4:%u, %u,%u,%u.\n",
+ csk, csk->state, csk->flags, csk->atid,
+ &req->local_ip, ntohs(req->local_port),
+ &req->peer_ip, ntohs(req->peer_port),
+ csk->mss_idx, e->idx, e->smt_idx);
+
+ l2t_send(csk->cdev->lldev, skb, csk->l2t);
+}
+
+static inline void act_open_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
+{
+ cxgbi_sock_act_open_req_arp_failure(NULL, skb);
+}
+
+/*
+ * CPL connection close request: host ->
+ *
+ * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to
+ * the write queue (i.e., after any unsent txt data).
+ */
+static void send_close_req(struct cxgbi_sock *csk)
+{
+ struct sk_buff *skb = csk->cpl_close;
+ struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
+ unsigned int tid = csk->tid;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u.\n",
+ csk, csk->state, csk->flags, csk->tid);
+
+ csk->cpl_close = NULL;
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
+ req->wr.wr_lo = htonl(V_WR_TID(tid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
+ req->rsvd = htonl(csk->write_seq);
+
+ cxgbi_sock_skb_entail(csk, skb);
+ if (csk->state >= CTP_ESTABLISHED)
+ push_tx_frames(csk, 1);
+}
+
+/*
+ * CPL connection abort request: host ->
+ *
+ * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs
+ * for the same connection and also that we do not try to send a message
+ * after the connection has closed.
+ */
+static void abort_arp_failure(struct t3cdev *tdev, struct sk_buff *skb)
+{
+ struct cpl_abort_req *req = cplhdr(skb);
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "t3dev 0x%p, tid %u, skb 0x%p.\n",
+ tdev, GET_TID(req), skb);
+ req->cmd = CPL_ABORT_NO_RST;
+ cxgb3_ofld_send(tdev, skb);
+}
+
+static void send_abort_req(struct cxgbi_sock *csk)
+{
+ struct sk_buff *skb = csk->cpl_abort_req;
+ struct cpl_abort_req *req;
+
+ if (unlikely(csk->state == CTP_ABORTING || !skb))
+ return;
+ cxgbi_sock_set_state(csk, CTP_ABORTING);
+ cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
+ /* Purge the send queue so we don't send anything after an abort. */
+ cxgbi_sock_purge_write_queue(csk);
+
+ csk->cpl_abort_req = NULL;
+ req = (struct cpl_abort_req *)skb->head;
+ skb->priority = CPL_PRIORITY_DATA;
+ set_arp_failure_handler(skb, abort_arp_failure);
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
+ req->wr.wr_lo = htonl(V_WR_TID(csk->tid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
+ req->rsvd0 = htonl(csk->snd_nxt);
+ req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
+ req->cmd = CPL_ABORT_SEND_RST;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
+ csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
+ req->rsvd1);
+
+ l2t_send(csk->cdev->lldev, skb, csk->l2t);
+}
+
+/*
+ * CPL connection abort reply: host ->
+ *
+ * Send an ABORT_RPL message in response of the ABORT_REQ received.
+ */
+static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
+{
+ struct sk_buff *skb = csk->cpl_abort_rpl;
+ struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u, status %d.\n",
+ csk, csk->state, csk->flags, csk->tid, rst_status);
+
+ csk->cpl_abort_rpl = NULL;
+ skb->priority = CPL_PRIORITY_DATA;
+ rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
+ rpl->wr.wr_lo = htonl(V_WR_TID(csk->tid));
+ OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
+ rpl->cmd = rst_status;
+ cxgb3_ofld_send(csk->cdev->lldev, skb);
+}
+
+/*
+ * CPL connection rx data ack: host ->
+ * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
+ * credits sent.
+ */
+static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
+{
+ struct sk_buff *skb;
+ struct cpl_rx_data_ack *req;
+ u32 dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1);
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
+ "csk 0x%p,%u,0x%lx,%u, credit %u, dack %u.\n",
+ csk, csk->state, csk->flags, csk->tid, credits, dack);
+
+ skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
+ if (!skb) {
+ pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
+ return 0;
+ }
+ req = (struct cpl_rx_data_ack *)skb->head;
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid));
+ req->credit_dack = htonl(F_RX_DACK_CHANGE | V_RX_DACK_MODE(1) |
+ V_RX_CREDITS(credits));
+ skb->priority = CPL_PRIORITY_ACK;
+ cxgb3_ofld_send(csk->cdev->lldev, skb);
+ return credits;
+}
+
+/*
+ * CPL connection tx data: host ->
+ *
+ * Send iscsi PDU via TX_DATA CPL message. Returns the number of
+ * credits sent.
+ * Each TX_DATA consumes work request credit (wrs), so we need to keep track of
+ * how many we've used so far and how many are pending (i.e., yet ack'ed by T3).
+ */
+
+static unsigned int wrlen __read_mostly;
+static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly;
+
+static void init_wr_tab(unsigned int wr_len)
+{
+ int i;
+
+ if (skb_wrs[1]) /* already initialized */
+ return;
+ for (i = 1; i < SKB_WR_LIST_SIZE; i++) {
+ int sgl_len = (3 * i) / 2 + (i & 1);
+
+ sgl_len += 3;
+ skb_wrs[i] = (sgl_len <= wr_len
+ ? 1 : 1 + (sgl_len - 2) / (wr_len - 1));
+ }
+ wrlen = wr_len * 8;
+}
+
+static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
+ int len, int req_completion)
+{
+ struct tx_data_wr *req;
+ struct l2t_entry *l2t = csk->l2t;
+
+ skb_reset_transport_header(skb);
+ req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req));
+ req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) |
+ (req_completion ? F_WR_COMPL : 0));
+ req->wr_lo = htonl(V_WR_TID(csk->tid));
+ /* len includes the length of any HW ULP additions */
+ req->len = htonl(len);
+ /* V_TX_ULP_SUBMODE sets both the mode and submode */
+ req->flags = htonl(V_TX_ULP_SUBMODE(cxgbi_skcb_ulp_mode(skb)) |
+ V_TX_SHOVE((skb_peek(&csk->write_queue) ? 0 : 1)));
+ req->sndseq = htonl(csk->snd_nxt);
+ req->param = htonl(V_TX_PORT(l2t->smt_idx));
+
+ if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
+ req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT |
+ V_TX_CPU_IDX(csk->rss_qid));
+ /* sendbuffer is in units of 32KB. */
+ req->param |= htonl(V_TX_SNDBUF(cxgb3i_snd_win >> 15));
+ cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
+ }
+}
+
+/**
+ * push_tx_frames -- start transmit
+ * @c3cn: the offloaded connection
+ * @req_completion: request wr_ack or not
+ *
+ * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a
+ * connection's send queue and sends them on to T3. Must be called with the
+ * connection's lock held. Returns the amount of send buffer space that was
+ * freed as a result of sending queued data to T3.
+ */
+
+static void arp_failure_skb_discard(struct t3cdev *dev, struct sk_buff *skb)
+{
+ kfree_skb(skb);
+}
+
+static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
+{
+ int total_size = 0;
+ struct sk_buff *skb;
+
+ if (unlikely(csk->state < CTP_ESTABLISHED ||
+ csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
+ csk, csk->state, csk->flags, csk->tid);
+ return 0;
+ }
+
+ while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
+ int len = skb->len; /* length before skb_push */
+ int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len);
+ int wrs_needed = skb_wrs[frags];
+
+ if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen)
+ wrs_needed = 1;
+
+ WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1);
+
+ if (csk->wr_cred < wrs_needed) {
+ log_debug(1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p, skb len %u/%u, frag %u, wr %d<%u.\n",
+ csk, skb->len, skb->data_len, frags,
+ wrs_needed, csk->wr_cred);
+ break;
+ }
+
+ __skb_unlink(skb, &csk->write_queue);
+ skb->priority = CPL_PRIORITY_DATA;
+ skb->csum = wrs_needed; /* remember this until the WR_ACK */
+ csk->wr_cred -= wrs_needed;
+ csk->wr_una_cred += wrs_needed;
+ cxgbi_sock_enqueue_wr(csk, skb);
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p, enqueue, skb len %u/%u, frag %u, wr %d, "
+ "left %u, unack %u.\n",
+ csk, skb->len, skb->data_len, frags, skb->csum,
+ csk->wr_cred, csk->wr_una_cred);
+
+ if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
+ if ((req_completion &&
+ csk->wr_una_cred == wrs_needed) ||
+ csk->wr_una_cred >= csk->wr_max_cred / 2) {
+ req_completion = 1;
+ csk->wr_una_cred = 0;
+ }
+ len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
+ make_tx_data_wr(csk, skb, len, req_completion);
+ csk->snd_nxt += len;
+ cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
+ }
+ total_size += skb->truesize;
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p, tid 0x%x, send skb 0x%p.\n",
+ csk, csk->tid, skb);
+ set_arp_failure_handler(skb, arp_failure_skb_discard);
+ l2t_send(csk->cdev->lldev, skb, csk->l2t);
+ }
+ return total_size;
+}
+
+/*
+ * Process a CPL_ACT_ESTABLISH message: -> host
+ * Updates connection state from an active establish CPL message. Runs with
+ * the connection lock held.
+ */
+
+static inline void free_atid(struct cxgbi_sock *csk)
+{
+ if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
+ cxgb3_free_atid(csk->cdev->lldev, csk->atid);
+ cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
+ cxgbi_sock_put(csk);
+ }
+}
+
+static int do_act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct cxgbi_sock *csk = ctx;
+ struct cpl_act_establish *req = cplhdr(skb);
+ unsigned int tid = GET_TID(req);
+ unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
+ u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "atid 0x%x,tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
+ atid, atid, csk, csk->state, csk->flags, rcv_isn);
+
+ cxgbi_sock_get(csk);
+ cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
+ csk->tid = tid;
+ cxgb3_insert_tid(csk->cdev->lldev, &t3_client, csk, tid);
+
+ free_atid(csk);
+
+ csk->rss_qid = G_QNUM(ntohs(skb->csum));
+
+ spin_lock_bh(&csk->lock);
+ if (csk->retry_timer.function) {
+ del_timer(&csk->retry_timer);
+ csk->retry_timer.function = NULL;
+ }
+
+ if (unlikely(csk->state != CTP_ACTIVE_OPEN))
+ pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
+ csk, csk->state, csk->flags, csk->tid);
+
+ csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
+ if (cxgb3i_rcv_win > (M_RCV_BUFSIZ << 10))
+ csk->rcv_wup -= cxgb3i_rcv_win - (M_RCV_BUFSIZ << 10);
+
+ cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
+
+ if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
+ /* upper layer has requested closing */
+ send_abort_req(csk);
+ else {
+ if (skb_queue_len(&csk->write_queue))
+ push_tx_frames(csk, 1);
+ cxgbi_conn_tx_open(csk);
+ }
+
+ spin_unlock_bh(&csk->lock);
+ __kfree_skb(skb);
+ return 0;
+}
+
+/*
+ * Process a CPL_ACT_OPEN_RPL message: -> host
+ * Handle active open failures.
+ */
+static int act_open_rpl_status_to_errno(int status)
+{
+ switch (status) {
+ case CPL_ERR_CONN_RESET:
+ return -ECONNREFUSED;
+ case CPL_ERR_ARP_MISS:
+ return -EHOSTUNREACH;
+ case CPL_ERR_CONN_TIMEDOUT:
+ return -ETIMEDOUT;
+ case CPL_ERR_TCAM_FULL:
+ return -ENOMEM;
+ case CPL_ERR_CONN_EXIST:
+ return -EADDRINUSE;
+ default:
+ return -EIO;
+ }
+}
+
+static void act_open_retry_timer(unsigned long data)
+{
+ struct sk_buff *skb;
+ struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u.\n",
+ csk, csk->state, csk->flags, csk->tid);
+
+ cxgbi_sock_get(csk);
+ spin_lock_bh(&csk->lock);
+ skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC);
+ if (!skb)
+ cxgbi_sock_fail_act_open(csk, -ENOMEM);
+ else {
+ skb->sk = (struct sock *)csk;
+ set_arp_failure_handler(skb, act_open_arp_failure);
+ send_act_open_req(csk, skb, csk->l2t);
+ }
+ spin_unlock_bh(&csk->lock);
+ cxgbi_sock_put(csk);
+}
+
+static int do_act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct cxgbi_sock *csk = ctx;
+ struct cpl_act_open_rpl *rpl = cplhdr(skb);
+
+ pr_info("csk 0x%p,%u,0x%lx,%u, status %u, %pI4:%u-%pI4:%u.\n",
+ csk, csk->state, csk->flags, csk->atid, rpl->status,
+ &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
+ &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port));
+
+ if (rpl->status != CPL_ERR_TCAM_FULL &&
+ rpl->status != CPL_ERR_CONN_EXIST &&
+ rpl->status != CPL_ERR_ARP_MISS)
+ cxgb3_queue_tid_release(tdev, GET_TID(rpl));
+
+ cxgbi_sock_get(csk);
+ spin_lock_bh(&csk->lock);
+ if (rpl->status == CPL_ERR_CONN_EXIST &&
+ csk->retry_timer.function != act_open_retry_timer) {
+ csk->retry_timer.function = act_open_retry_timer;
+ mod_timer(&csk->retry_timer, jiffies + HZ / 2);
+ } else
+ cxgbi_sock_fail_act_open(csk,
+ act_open_rpl_status_to_errno(rpl->status));
+
+ spin_unlock_bh(&csk->lock);
+ cxgbi_sock_put(csk);
+ __kfree_skb(skb);
+ return 0;
+}
+
+/*
+ * Process PEER_CLOSE CPL messages: -> host
+ * Handle peer FIN.
+ */
+static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
+{
+ struct cxgbi_sock *csk = ctx;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u.\n",
+ csk, csk->state, csk->flags, csk->tid);
+
+ cxgbi_sock_rcv_peer_close(csk);
+ __kfree_skb(skb);
+ return 0;
+}
+
+/*
+ * Process CLOSE_CONN_RPL CPL message: -> host
+ * Process a peer ACK to our FIN.
+ */
+static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb,
+ void *ctx)
+{
+ struct cxgbi_sock *csk = ctx;
+ struct cpl_close_con_rpl *rpl = cplhdr(skb);
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u, snxt %u.\n",
+ csk, csk->state, csk->flags, csk->tid, ntohl(rpl->snd_nxt));
+
+ cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
+ __kfree_skb(skb);
+ return 0;
+}
+
+/*
+ * Process ABORT_REQ_RSS CPL message: -> host
+ * Process abort requests. If we are waiting for an ABORT_RPL we ignore this
+ * request except that we need to reply to it.
+ */
+
+static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
+ int *need_rst)
+{
+ switch (abort_reason) {
+ case CPL_ERR_BAD_SYN: /* fall through */
+ case CPL_ERR_CONN_RESET:
+ return csk->state > CTP_ESTABLISHED ? -EPIPE : -ECONNRESET;
+ case CPL_ERR_XMIT_TIMEDOUT:
+ case CPL_ERR_PERSIST_TIMEDOUT:
+ case CPL_ERR_FINWAIT2_TIMEDOUT:
+ case CPL_ERR_KEEPALIVE_TIMEDOUT:
+ return -ETIMEDOUT;
+ default:
+ return -EIO;
+ }
+}
+
+static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
+{
+ const struct cpl_abort_req_rss *req = cplhdr(skb);
+ struct cxgbi_sock *csk = ctx;
+ int rst_status = CPL_ABORT_NO_RST;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u.\n",
+ csk, csk->state, csk->flags, csk->tid);
+
+ if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
+ req->status == CPL_ERR_PERSIST_NEG_ADVICE) {
+ goto done;
+ }
+
+ cxgbi_sock_get(csk);
+ spin_lock_bh(&csk->lock);
+
+ if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
+ cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
+ cxgbi_sock_set_state(csk, CTP_ABORTING);
+ goto out;
+ }
+
+ cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
+ send_abort_rpl(csk, rst_status);
+
+ if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
+ csk->err = abort_status_to_errno(csk, req->status, &rst_status);
+ cxgbi_sock_closed(csk);
+ }
+
+out:
+ spin_unlock_bh(&csk->lock);
+ cxgbi_sock_put(csk);
+done:
+ __kfree_skb(skb);
+ return 0;
+}
+
+/*
+ * Process ABORT_RPL_RSS CPL message: -> host
+ * Process abort replies. We only process these messages if we anticipate
+ * them as the coordination between SW and HW in this area is somewhat lacking
+ * and sometimes we get ABORT_RPLs after we are done with the connection that
+ * originated the ABORT_REQ.
+ */
+static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
+{
+ struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
+ struct cxgbi_sock *csk = ctx;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
+ rpl->status, csk, csk ? csk->state : 0,
+ csk ? csk->flags : 0UL);
+ /*
+ * Ignore replies to post-close aborts indicating that the abort was
+ * requested too late. These connections are terminated when we get
+ * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss
+ * arrives the TID is either no longer used or it has been recycled.
+ */
+ if (rpl->status == CPL_ERR_ABORT_FAILED)
+ goto rel_skb;
+ /*
+ * Sometimes we've already closed the connection, e.g., a post-close
+ * abort races with ABORT_REQ_RSS, the latter frees the connection
+ * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED,
+ * but FW turns the ABORT_REQ into a regular one and so we get
+ * ABORT_RPL_RSS with status 0 and no connection.
+ */
+ if (csk)
+ cxgbi_sock_rcv_abort_rpl(csk);
+rel_skb:
+ __kfree_skb(skb);
+ return 0;
+}
+
+/*
+ * Process RX_ISCSI_HDR CPL message: -> host
+ * Handle received PDUs, the payload could be DDP'ed. If not, the payload
+ * follow after the bhs.
+ */
+static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx)
+{
+ struct cxgbi_sock *csk = ctx;
+ struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb);
+ struct cpl_iscsi_hdr_norss data_cpl;
+ struct cpl_rx_data_ddp_norss ddp_cpl;
+ unsigned int hdr_len, data_len, status;
+ unsigned int len;
+ int err;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
+ "csk 0x%p,%u,0x%lx,%u, skb 0x%p,%u.\n",
+ csk, csk->state, csk->flags, csk->tid, skb, skb->len);
+
+ spin_lock_bh(&csk->lock);
+
+ if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u, bad state.\n",
+ csk, csk->state, csk->flags, csk->tid);
+ if (csk->state != CTP_ABORTING)
+ goto abort_conn;
+ else
+ goto discard;
+ }
+
+ cxgbi_skcb_tcp_seq(skb) = ntohl(hdr_cpl->seq);
+ cxgbi_skcb_flags(skb) = 0;
+
+ skb_reset_transport_header(skb);
+ __skb_pull(skb, sizeof(struct cpl_iscsi_hdr));
+
+ len = hdr_len = ntohs(hdr_cpl->len);
+ /* msg coalesce is off or not enough data received */
+ if (skb->len <= hdr_len) {
+ pr_err("%s: tid %u, CPL_ISCSI_HDR, skb len %u < %u.\n",
+ csk->cdev->ports[csk->port_id]->name, csk->tid,
+ skb->len, hdr_len);
+ goto abort_conn;
+ }
+ cxgbi_skcb_set_flag(skb, SKCBF_RX_COALESCED);
+
+ err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl,
+ sizeof(ddp_cpl));
+ if (err < 0) {
+ pr_err("%s: tid %u, copy cpl_ddp %u-%zu failed %d.\n",
+ csk->cdev->ports[csk->port_id]->name, csk->tid,
+ skb->len, sizeof(ddp_cpl), err);
+ goto abort_conn;
+ }
+
+ cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
+ cxgbi_skcb_rx_pdulen(skb) = ntohs(ddp_cpl.len);
+ cxgbi_skcb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc);
+ status = ntohl(ddp_cpl.ddp_status);
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
+ "csk 0x%p, skb 0x%p,%u, pdulen %u, status 0x%x.\n",
+ csk, skb, skb->len, cxgbi_skcb_rx_pdulen(skb), status);
+
+ if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT))
+ cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
+ if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT))
+ cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
+ if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT))
+ cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
+
+ if (skb->len > (hdr_len + sizeof(ddp_cpl))) {
+ err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl));
+ if (err < 0) {
+ pr_err("%s: tid %u, cp %zu/%u failed %d.\n",
+ csk->cdev->ports[csk->port_id]->name,
+ csk->tid, sizeof(data_cpl), skb->len, err);
+ goto abort_conn;
+ }
+ data_len = ntohs(data_cpl.len);
+ log_debug(1 << CXGBI_DBG_DDP | 1 << CXGBI_DBG_PDU_RX,
+ "skb 0x%p, pdu not ddp'ed %u/%u, status 0x%x.\n",
+ skb, data_len, cxgbi_skcb_rx_pdulen(skb), status);
+ len += sizeof(data_cpl) + data_len;
+ } else if (status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT))
+ cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
+
+ csk->rcv_nxt = ntohl(ddp_cpl.seq) + cxgbi_skcb_rx_pdulen(skb);
+ __pskb_trim(skb, len);
+ __skb_queue_tail(&csk->receive_queue, skb);
+ cxgbi_conn_pdu_ready(csk);
+
+ spin_unlock_bh(&csk->lock);
+ return 0;
+
+abort_conn:
+ send_abort_req(csk);
+discard:
+ spin_unlock_bh(&csk->lock);
+ __kfree_skb(skb);
+ return 0;
+}
+
+/*
+ * Process TX_DATA_ACK CPL messages: -> host
+ * Process an acknowledgment of WR completion. Advance snd_una and send the
+ * next batch of work requests from the write queue.
+ */
+static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
+{
+ struct cxgbi_sock *csk = ctx;
+ struct cpl_wr_ack *hdr = cplhdr(skb);
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
+ "csk 0x%p,%u,0x%lx,%u, cr %u.\n",
+ csk, csk->state, csk->flags, csk->tid, ntohs(hdr->credits));
+
+ cxgbi_sock_rcv_wr_ack(csk, ntohs(hdr->credits), ntohl(hdr->snd_una), 1);
+ __kfree_skb(skb);
+ return 0;
+}
+
+/*
+ * for each connection, pre-allocate skbs needed for close/abort requests. So
+ * that we can service the request right away.
+ */
+static int alloc_cpls(struct cxgbi_sock *csk)
+{
+ csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 0,
+ GFP_KERNEL);
+ if (!csk->cpl_close)
+ return -ENOMEM;
+ csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 0,
+ GFP_KERNEL);
+ if (!csk->cpl_abort_req)
+ goto free_cpl_skbs;
+
+ csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 0,
+ GFP_KERNEL);
+ if (!csk->cpl_abort_rpl)
+ goto free_cpl_skbs;
+
+ return 0;
+
+free_cpl_skbs:
+ cxgbi_sock_free_cpl_skbs(csk);
+ return -ENOMEM;
+}
+
+/**
+ * release_offload_resources - release offload resource
+ * @c3cn: the offloaded iscsi tcp connection.
+ * Release resources held by an offload connection (TID, L2T entry, etc.)
+ */
+static void l2t_put(struct cxgbi_sock *csk)
+{
+ struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev;
+
+ if (csk->l2t) {
+ l2t_release(t3dev, csk->l2t);
+ csk->l2t = NULL;
+ cxgbi_sock_put(csk);
+ }
+}
+
+static void release_offload_resources(struct cxgbi_sock *csk)
+{
+ struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u.\n",
+ csk, csk->state, csk->flags, csk->tid);
+
+ csk->rss_qid = 0;
+ cxgbi_sock_free_cpl_skbs(csk);
+
+ if (csk->wr_cred != csk->wr_max_cred) {
+ cxgbi_sock_purge_wr_queue(csk);
+ cxgbi_sock_reset_wr_list(csk);
+ }
+ l2t_put(csk);
+ if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
+ free_atid(csk);
+ else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
+ cxgb3_remove_tid(t3dev, (void *)csk, csk->tid);
+ cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
+ cxgbi_sock_put(csk);
+ }
+ csk->dst = NULL;
+ csk->cdev = NULL;
+}
+
+static void update_address(struct cxgbi_hba *chba)
+{
+ if (chba->ipv4addr) {
+ if (chba->vdev &&
+ chba->ipv4addr != cxgb3i_get_private_ipv4addr(chba->vdev)) {
+ cxgb3i_set_private_ipv4addr(chba->vdev, chba->ipv4addr);
+ cxgb3i_set_private_ipv4addr(chba->ndev, 0);
+ pr_info("%s set %pI4.\n",
+ chba->vdev->name, &chba->ipv4addr);
+ } else if (chba->ipv4addr !=
+ cxgb3i_get_private_ipv4addr(chba->ndev)) {
+ cxgb3i_set_private_ipv4addr(chba->ndev, chba->ipv4addr);
+ pr_info("%s set %pI4.\n",
+ chba->ndev->name, &chba->ipv4addr);
+ }
+ } else if (cxgb3i_get_private_ipv4addr(chba->ndev)) {
+ if (chba->vdev)
+ cxgb3i_set_private_ipv4addr(chba->vdev, 0);
+ cxgb3i_set_private_ipv4addr(chba->ndev, 0);
+ }
+}
+
+static int init_act_open(struct cxgbi_sock *csk)
+{
+ struct dst_entry *dst = csk->dst;
+ struct cxgbi_device *cdev = csk->cdev;
+ struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev;
+ struct net_device *ndev = cdev->ports[csk->port_id];
+ struct cxgbi_hba *chba = cdev->hbas[csk->port_id];
+ struct sk_buff *skb = NULL;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx.\n", csk, csk->state, csk->flags);
+
+ update_address(chba);
+ if (chba->ipv4addr)
+ csk->saddr.sin_addr.s_addr = chba->ipv4addr;
+
+ csk->rss_qid = 0;
+ csk->l2t = t3_l2t_get(t3dev, dst, ndev,
+ &csk->daddr.sin_addr.s_addr);
+ if (!csk->l2t) {
+ pr_err("NO l2t available.\n");
+ return -EINVAL;
+ }
+ cxgbi_sock_get(csk);
+
+ csk->atid = cxgb3_alloc_atid(t3dev, &t3_client, csk);
+ if (csk->atid < 0) {
+ pr_err("NO atid available.\n");
+ goto rel_resource;
+ }
+ cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
+ cxgbi_sock_get(csk);
+
+ skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL);
+ if (!skb)
+ goto rel_resource;
+ skb->sk = (struct sock *)csk;
+ set_arp_failure_handler(skb, act_open_arp_failure);
+
+ csk->wr_max_cred = csk->wr_cred = T3C_DATA(t3dev)->max_wrs - 1;
+ csk->wr_una_cred = 0;
+ csk->mss_idx = cxgbi_sock_select_mss(csk, dst_mtu(dst));
+ cxgbi_sock_reset_wr_list(csk);
+ csk->err = 0;
+
+ log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx, %pI4:%u-%pI4:%u.\n",
+ csk, csk->state, csk->flags,
+ &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
+ &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port));
+
+ cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
+ send_act_open_req(csk, skb, csk->l2t);
+ return 0;
+
+rel_resource:
+ if (skb)
+ __kfree_skb(skb);
+ return -EINVAL;
+}
+
+cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS] = {
+ [CPL_ACT_ESTABLISH] = do_act_establish,
+ [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
+ [CPL_PEER_CLOSE] = do_peer_close,
+ [CPL_ABORT_REQ_RSS] = do_abort_req,
+ [CPL_ABORT_RPL_RSS] = do_abort_rpl,
+ [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
+ [CPL_TX_DMA_ACK] = do_wr_ack,
+ [CPL_ISCSI_HDR] = do_iscsi_hdr,
+};
+
+/**
+ * cxgb3i_ofld_init - allocate and initialize resources for each adapter found
+ * @cdev: cxgbi adapter
+ */
+int cxgb3i_ofld_init(struct cxgbi_device *cdev)
+{
+ struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev;
+ struct adap_ports port;
+ struct ofld_page_info rx_page_info;
+ unsigned int wr_len;
+ int rc;
+
+ if (t3dev->ctl(t3dev, GET_WR_LEN, &wr_len) < 0 ||
+ t3dev->ctl(t3dev, GET_PORTS, &port) < 0 ||
+ t3dev->ctl(t3dev, GET_RX_PAGE_INFO, &rx_page_info) < 0) {
+ pr_warn("t3 0x%p, offload up, ioctl failed.\n", t3dev);
+ return -EINVAL;
+ }
+
+ if (cxgb3i_max_connect > CXGBI_MAX_CONN)
+ cxgb3i_max_connect = CXGBI_MAX_CONN;
+
+ rc = cxgbi_device_portmap_create(cdev, cxgb3i_sport_base,
+ cxgb3i_max_connect);
+ if (rc < 0)
+ return rc;
+
+ init_wr_tab(wr_len);
+ cdev->csk_release_offload_resources = release_offload_resources;
+ cdev->csk_push_tx_frames = push_tx_frames;
+ cdev->csk_send_abort_req = send_abort_req;
+ cdev->csk_send_close_req = send_close_req;
+ cdev->csk_send_rx_credits = send_rx_credits;
+ cdev->csk_alloc_cpls = alloc_cpls;
+ cdev->csk_init_act_open = init_act_open;
+
+ pr_info("cdev 0x%p, offload up, added.\n", cdev);
+ return 0;
+}
+
+/*
+ * functions to program the pagepod in h/w
+ */
+static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr)
+{
+ struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head;
+
+ memset(req, 0, sizeof(*req));
+
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS));
+ req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) |
+ V_ULPTX_CMD(ULP_MEM_WRITE));
+ req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) |
+ V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1));
+}
+
+static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
+ unsigned int idx, unsigned int npods,
+ struct cxgbi_gather_list *gl)
+{
+ struct cxgbi_device *cdev = csk->cdev;
+ struct cxgbi_ddp_info *ddp = cdev->ddp;
+ unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
+ int i;
+
+ log_debug(1 << CXGBI_DBG_DDP,
+ "csk 0x%p, idx %u, npods %u, gl 0x%p.\n",
+ csk, idx, npods, gl);
+
+ for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) {
+ struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) +
+ PPOD_SIZE, 0, GFP_ATOMIC);
+
+ if (!skb)
+ return -ENOMEM;
+
+ ulp_mem_io_set_hdr(skb, pm_addr);
+ cxgbi_ddp_ppod_set((struct cxgbi_pagepod *)(skb->head +
+ sizeof(struct ulp_mem_io)),
+ hdr, gl, i * PPOD_PAGES_MAX);
+ skb->priority = CPL_PRIORITY_CONTROL;
+ cxgb3_ofld_send(cdev->lldev, skb);
+ }
+ return 0;
+}
+
+static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
+ unsigned int idx, unsigned int npods)
+{
+ struct cxgbi_device *cdev = chba->cdev;
+ struct cxgbi_ddp_info *ddp = cdev->ddp;
+ unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
+ int i;
+
+ log_debug(1 << CXGBI_DBG_DDP,
+ "cdev 0x%p, idx %u, npods %u, tag 0x%x.\n",
+ cdev, idx, npods, tag);
+
+ for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) {
+ struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) +
+ PPOD_SIZE, 0, GFP_ATOMIC);
+
+ if (!skb) {
+ pr_err("tag 0x%x, 0x%x, %d/%u, skb OOM.\n",
+ tag, idx, i, npods);
+ continue;
+ }
+ ulp_mem_io_set_hdr(skb, pm_addr);
+ skb->priority = CPL_PRIORITY_CONTROL;
+ cxgb3_ofld_send(cdev->lldev, skb);
+ }
+}
+
+static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk,
+ unsigned int tid, int pg_idx, bool reply)
+{
+ struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0,
+ GFP_KERNEL);
+ struct cpl_set_tcb_field *req;
+ u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0;
+
+ log_debug(1 << CXGBI_DBG_DDP,
+ "csk 0x%p, tid %u, pg_idx %d.\n", csk, tid, pg_idx);
+ if (!skb)
+ return -ENOMEM;
+
+ /* set up ulp submode and page size */
+ req = (struct cpl_set_tcb_field *)skb->head;
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
+ req->reply = V_NO_REPLY(reply ? 0 : 1);
+ req->cpu_idx = 0;
+ req->word = htons(31);
+ req->mask = cpu_to_be64(0xF0000000);
+ req->val = cpu_to_be64(val << 28);
+ skb->priority = CPL_PRIORITY_CONTROL;
+
+ cxgb3_ofld_send(csk->cdev->lldev, skb);
+ return 0;
+}
+
+/**
+ * cxgb3i_setup_conn_digest - setup conn. digest setting
+ * @csk: cxgb tcp socket
+ * @tid: connection id
+ * @hcrc: header digest enabled
+ * @dcrc: data digest enabled
+ * @reply: request reply from h/w
+ * set up the iscsi digest settings for a connection identified by tid
+ */
+static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
+ int hcrc, int dcrc, int reply)
+{
+ struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0,
+ GFP_KERNEL);
+ struct cpl_set_tcb_field *req;
+ u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0);
+
+ log_debug(1 << CXGBI_DBG_DDP,
+ "csk 0x%p, tid %u, crc %d,%d.\n", csk, tid, hcrc, dcrc);
+ if (!skb)
+ return -ENOMEM;
+
+ /* set up ulp submode and page size */
+ req = (struct cpl_set_tcb_field *)skb->head;
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
+ req->reply = V_NO_REPLY(reply ? 0 : 1);
+ req->cpu_idx = 0;
+ req->word = htons(31);
+ req->mask = cpu_to_be64(0x0F000000);
+ req->val = cpu_to_be64(val << 24);
+ skb->priority = CPL_PRIORITY_CONTROL;
+
+ cxgb3_ofld_send(csk->cdev->lldev, skb);
+ return 0;
+}
+
+/**
+ * t3_ddp_cleanup - release the cxgb3 adapter's ddp resource
+ * @cdev: cxgb3i adapter
+ * release all the resource held by the ddp pagepod manager for a given
+ * adapter if needed
+ */
+
+static void t3_ddp_cleanup(struct cxgbi_device *cdev)
+{
+ struct t3cdev *tdev = (struct t3cdev *)cdev->lldev;
+
+ if (cxgbi_ddp_cleanup(cdev)) {
+ pr_info("t3dev 0x%p, ulp_iscsi no more user.\n", tdev);
+ tdev->ulp_iscsi = NULL;
+ }
+}
+
+/**
+ * ddp_init - initialize the cxgb3 adapter's ddp resource
+ * @cdev: cxgb3i adapter
+ * initialize the ddp pagepod manager for a given adapter
+ */
+static int cxgb3i_ddp_init(struct cxgbi_device *cdev)
+{
+ struct t3cdev *tdev = (struct t3cdev *)cdev->lldev;
+ struct cxgbi_ddp_info *ddp = tdev->ulp_iscsi;
+ struct ulp_iscsi_info uinfo;
+ unsigned int pgsz_factor[4];
+ int i, err;
+
+ if (ddp) {
+ kref_get(&ddp->refcnt);
+ pr_warn("t3dev 0x%p, ddp 0x%p already set up.\n",
+ tdev, tdev->ulp_iscsi);
+ cdev->ddp = ddp;
+ return -EALREADY;
+ }
+
+ err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo);
+ if (err < 0) {
+ pr_err("%s, failed to get iscsi param err=%d.\n",
+ tdev->name, err);
+ return err;
+ }
+
+ err = cxgbi_ddp_init(cdev, uinfo.llimit, uinfo.ulimit,
+ uinfo.max_txsz, uinfo.max_rxsz);
+ if (err < 0)
+ return err;
+
+ ddp = cdev->ddp;
+
+ uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
+ cxgbi_ddp_page_size_factor(pgsz_factor);
+ for (i = 0; i < 4; i++)
+ uinfo.pgsz_factor[i] = pgsz_factor[i];
+ uinfo.ulimit = uinfo.llimit + (ddp->nppods << PPOD_SIZE_SHIFT);
+
+ err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo);
+ if (err < 0) {
+ pr_warn("%s unable to set iscsi param err=%d, ddp disabled.\n",
+ tdev->name, err);
+ cxgbi_ddp_cleanup(cdev);
+ return err;
+ }
+ tdev->ulp_iscsi = ddp;
+
+ cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
+ cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
+ cdev->csk_ddp_set = ddp_set_map;
+ cdev->csk_ddp_clear = ddp_clear_map;
+
+ pr_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
+ "%u/%u.\n",
+ tdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
+ ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz,
+ ddp->max_rxsz, uinfo.max_rxsz);
+ return 0;
+}
+
+static void cxgb3i_dev_close(struct t3cdev *t3dev)
+{
+ struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev);
+
+ if (!cdev || cdev->flags & CXGBI_FLAG_ADAPTER_RESET) {
+ pr_info("0x%p close, f 0x%x.\n", cdev, cdev ? cdev->flags : 0);
+ return;
+ }
+
+ cxgbi_device_unregister(cdev);
+}
+
+/**
+ * cxgb3i_dev_open - init a t3 adapter structure and any h/w settings
+ * @t3dev: t3cdev adapter
+ */
+static void cxgb3i_dev_open(struct t3cdev *t3dev)
+{
+ struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev);
+ struct adapter *adapter = tdev2adap(t3dev);
+ int i, err;
+
+ if (cdev) {
+ pr_info("0x%p, updating.\n", cdev);
+ return;
+ }
+
+ cdev = cxgbi_device_register(0, adapter->params.nports);
+ if (!cdev) {
+ pr_warn("device 0x%p register failed.\n", t3dev);
+ return;
+ }
+
+ cdev->flags = CXGBI_FLAG_DEV_T3 | CXGBI_FLAG_IPV4_SET;
+ cdev->lldev = t3dev;
+ cdev->pdev = adapter->pdev;
+ cdev->ports = adapter->port;
+ cdev->nports = adapter->params.nports;
+ cdev->mtus = adapter->params.mtus;
+ cdev->nmtus = NMTUS;
+ cdev->snd_win = cxgb3i_snd_win;
+ cdev->rcv_win = cxgb3i_rcv_win;
+ cdev->rx_credit_thres = cxgb3i_rx_credit_thres;
+ cdev->skb_tx_rsvd = CXGB3I_TX_HEADER_LEN;
+ cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr_norss);
+ cdev->dev_ddp_cleanup = t3_ddp_cleanup;
+ cdev->itp = &cxgb3i_iscsi_transport;
+
+ err = cxgb3i_ddp_init(cdev);
+ if (err) {
+ pr_info("0x%p ddp init failed\n", cdev);
+ goto err_out;
+ }
+
+ err = cxgb3i_ofld_init(cdev);
+ if (err) {
+ pr_info("0x%p offload init failed\n", cdev);
+ goto err_out;
+ }
+
+ err = cxgbi_hbas_add(cdev, CXGB3I_MAX_LUN, CXGBI_MAX_CONN,
+ &cxgb3i_host_template, cxgb3i_stt);
+ if (err)
+ goto err_out;
+
+ for (i = 0; i < cdev->nports; i++)
+ cdev->hbas[i]->ipv4addr =
+ cxgb3i_get_private_ipv4addr(cdev->ports[i]);
+
+ pr_info("cdev 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n",
+ cdev, cdev ? cdev->flags : 0, t3dev, err);
+ return;
+
+err_out:
+ cxgbi_device_unregister(cdev);
+}
+
+static void cxgb3i_dev_event_handler(struct t3cdev *t3dev, u32 event, u32 port)
+{
+ struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev);
+
+ log_debug(1 << CXGBI_DBG_TOE,
+ "0x%p, cdev 0x%p, event 0x%x, port 0x%x.\n",
+ t3dev, cdev, event, port);
+ if (!cdev)
+ return;
+
+ switch (event) {
+ case OFFLOAD_STATUS_DOWN:
+ cdev->flags |= CXGBI_FLAG_ADAPTER_RESET;
+ break;
+ case OFFLOAD_STATUS_UP:
+ cdev->flags &= ~CXGBI_FLAG_ADAPTER_RESET;
+ break;
+ }
+}
+
+/**
+ * cxgb3i_init_module - module init entry point
+ *
+ * initialize any driver wide global data structures and register itself
+ * with the cxgb3 module
+ */
+static int __init cxgb3i_init_module(void)
+{
+ int rc;
+
+ printk(KERN_INFO "%s", version);
+
+ rc = cxgbi_iscsi_init(&cxgb3i_iscsi_transport, &cxgb3i_stt);
+ if (rc < 0)
+ return rc;
+
+ cxgb3_register_client(&t3_client);
+ return 0;
+}
+
+/**
+ * cxgb3i_exit_module - module cleanup/exit entry point
+ *
+ * go through the driver hba list and for each hba, release any resource held.
+ * and unregisters iscsi transport and the cxgb3 module
+ */
+static void __exit cxgb3i_exit_module(void)
+{
+ cxgb3_unregister_client(&t3_client);
+ cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T3);
+ cxgbi_iscsi_cleanup(&cxgb3i_iscsi_transport, &cxgb3i_stt);
+}
+
+module_init(cxgb3i_init_module);
+module_exit(cxgb3i_exit_module);
Code Review / kvmfornfv.git / blobdiff