2 * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management
4 * Copyright (C) 2003-2008 Chelsio Communications. All rights reserved.
6 * This program is distributed in the hope that it will be useful, but WITHOUT
7 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
8 * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this
9 * release for licensing terms and conditions.
11 * Written by: Dimitris Michailidis (dm@chelsio.com)
12 * Karen Xie (kxie@chelsio.com)
15 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
17 #include <linux/version.h>
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <scsi/scsi_host.h>
25 #include "cxgb3_defs.h"
26 #include "cxgb3_ctl_defs.h"
27 #include "cxgb3_offload.h"
28 #include "firmware_exports.h"
31 static unsigned int dbg_level;
32 #include "../libcxgbi.h"
34 #define DRV_MODULE_NAME "cxgb3i"
35 #define DRV_MODULE_DESC "Chelsio T3 iSCSI Driver"
36 #define DRV_MODULE_VERSION "2.0.0"
37 #define DRV_MODULE_RELDATE "Jun. 2010"
39 static char version[] =
40 DRV_MODULE_DESC " " DRV_MODULE_NAME
41 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
43 MODULE_AUTHOR("Chelsio Communications, Inc.");
44 MODULE_DESCRIPTION(DRV_MODULE_DESC);
45 MODULE_VERSION(DRV_MODULE_VERSION);
46 MODULE_LICENSE("GPL");
48 module_param(dbg_level, uint, 0644);
49 MODULE_PARM_DESC(dbg_level, "debug flag (default=0)");
51 static int cxgb3i_rcv_win = 256 * 1024;
52 module_param(cxgb3i_rcv_win, int, 0644);
53 MODULE_PARM_DESC(cxgb3i_rcv_win, "TCP receive window in bytes (default=256KB)");
55 static int cxgb3i_snd_win = 128 * 1024;
56 module_param(cxgb3i_snd_win, int, 0644);
57 MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)");
59 static int cxgb3i_rx_credit_thres = 10 * 1024;
60 module_param(cxgb3i_rx_credit_thres, int, 0644);
61 MODULE_PARM_DESC(rx_credit_thres,
62 "RX credits return threshold in bytes (default=10KB)");
64 static unsigned int cxgb3i_max_connect = 8 * 1024;
65 module_param(cxgb3i_max_connect, uint, 0644);
66 MODULE_PARM_DESC(cxgb3i_max_connect, "Max. # of connections (default=8092)");
68 static unsigned int cxgb3i_sport_base = 20000;
69 module_param(cxgb3i_sport_base, uint, 0644);
70 MODULE_PARM_DESC(cxgb3i_sport_base, "starting port number (default=20000)");
72 static void cxgb3i_dev_open(struct t3cdev *);
73 static void cxgb3i_dev_close(struct t3cdev *);
74 static void cxgb3i_dev_event_handler(struct t3cdev *, u32, u32);
76 static struct cxgb3_client t3_client = {
77 .name = DRV_MODULE_NAME,
78 .handlers = cxgb3i_cpl_handlers,
79 .add = cxgb3i_dev_open,
80 .remove = cxgb3i_dev_close,
81 .event_handler = cxgb3i_dev_event_handler,
84 static struct scsi_host_template cxgb3i_host_template = {
85 .module = THIS_MODULE,
86 .name = DRV_MODULE_NAME,
87 .proc_name = DRV_MODULE_NAME,
88 .can_queue = CXGB3I_SCSI_HOST_QDEPTH,
89 .queuecommand = iscsi_queuecommand,
90 .change_queue_depth = iscsi_change_queue_depth,
91 .sg_tablesize = SG_ALL,
92 .max_sectors = 0xFFFF,
93 .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
94 .eh_abort_handler = iscsi_eh_abort,
95 .eh_device_reset_handler = iscsi_eh_device_reset,
96 .eh_target_reset_handler = iscsi_eh_recover_target,
97 .target_alloc = iscsi_target_alloc,
98 .use_clustering = DISABLE_CLUSTERING,
102 static struct iscsi_transport cxgb3i_iscsi_transport = {
103 .owner = THIS_MODULE,
104 .name = DRV_MODULE_NAME,
105 /* owner and name should be set already */
106 .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST
107 | CAP_DATADGST | CAP_DIGEST_OFFLOAD |
109 .param_mask = ISCSI_MAX_RECV_DLENGTH | ISCSI_MAX_XMIT_DLENGTH |
110 ISCSI_HDRDGST_EN | ISCSI_DATADGST_EN |
111 ISCSI_INITIAL_R2T_EN | ISCSI_MAX_R2T |
112 ISCSI_IMM_DATA_EN | ISCSI_FIRST_BURST |
113 ISCSI_MAX_BURST | ISCSI_PDU_INORDER_EN |
114 ISCSI_DATASEQ_INORDER_EN | ISCSI_ERL |
115 ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
116 ISCSI_EXP_STATSN | ISCSI_PERSISTENT_PORT |
117 ISCSI_PERSISTENT_ADDRESS |
118 ISCSI_TARGET_NAME | ISCSI_TPGT |
119 ISCSI_USERNAME | ISCSI_PASSWORD |
120 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
121 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
122 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
123 ISCSI_PING_TMO | ISCSI_RECV_TMO |
124 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
125 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
126 ISCSI_HOST_INITIATOR_NAME |
127 ISCSI_HOST_NETDEV_NAME,
128 .get_host_param = cxgbi_get_host_param,
129 .set_host_param = cxgbi_set_host_param,
130 /* session management */
131 .create_session = cxgbi_create_session,
132 .destroy_session = cxgbi_destroy_session,
133 .get_session_param = iscsi_session_get_param,
134 /* connection management */
135 .create_conn = cxgbi_create_conn,
136 .bind_conn = cxgbi_bind_conn,
137 .destroy_conn = iscsi_tcp_conn_teardown,
138 .start_conn = iscsi_conn_start,
139 .stop_conn = iscsi_conn_stop,
140 .get_conn_param = cxgbi_get_conn_param,
141 .set_param = cxgbi_set_conn_param,
142 .get_stats = cxgbi_get_conn_stats,
143 /* pdu xmit req from user space */
144 .send_pdu = iscsi_conn_send_pdu,
146 .init_task = iscsi_tcp_task_init,
147 .xmit_task = iscsi_tcp_task_xmit,
148 .cleanup_task = cxgbi_cleanup_task,
150 .alloc_pdu = cxgbi_conn_alloc_pdu,
151 .init_pdu = cxgbi_conn_init_pdu,
152 .xmit_pdu = cxgbi_conn_xmit_pdu,
153 .parse_pdu_itt = cxgbi_parse_pdu_itt,
154 /* TCP connect/disconnect */
155 .ep_connect = cxgbi_ep_connect,
156 .ep_poll = cxgbi_ep_poll,
157 .ep_disconnect = cxgbi_ep_disconnect,
158 /* Error recovery timeout call */
159 .session_recovery_timedout = iscsi_session_recovery_timedout,
162 static struct scsi_transport_template *cxgb3i_stt;
165 * CPL (Chelsio Protocol Language) defines a message passing interface between
166 * the host driver and Chelsio asic.
167 * The section below implments CPLs that related to iscsi tcp connection
168 * open/close/abort and data send/receive.
171 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion);
173 static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
174 const struct l2t_entry *e)
176 unsigned int wscale = cxgbi_sock_compute_wscale(cxgb3i_rcv_win);
177 struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head;
179 skb->priority = CPL_PRIORITY_SETUP;
181 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
182 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, csk->atid));
183 req->local_port = csk->saddr.sin_port;
184 req->peer_port = csk->daddr.sin_port;
185 req->local_ip = csk->saddr.sin_addr.s_addr;
186 req->peer_ip = csk->daddr.sin_addr.s_addr;
188 req->opt0h = htonl(V_KEEP_ALIVE(1) | F_TCAM_BYPASS |
189 V_WND_SCALE(wscale) | V_MSS_IDX(csk->mss_idx) |
190 V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx));
191 req->opt0l = htonl(V_ULP_MODE(ULP2_MODE_ISCSI) |
192 V_RCV_BUFSIZ(cxgb3i_rcv_win>>10));
194 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
195 "csk 0x%p,%u,0x%lx,%u, %pI4:%u-%pI4:%u, %u,%u,%u.\n",
196 csk, csk->state, csk->flags, csk->atid,
197 &req->local_ip, ntohs(req->local_port),
198 &req->peer_ip, ntohs(req->peer_port),
199 csk->mss_idx, e->idx, e->smt_idx);
201 l2t_send(csk->cdev->lldev, skb, csk->l2t);
204 static inline void act_open_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
206 cxgbi_sock_act_open_req_arp_failure(NULL, skb);
210 * CPL connection close request: host ->
212 * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to
213 * the write queue (i.e., after any unsent txt data).
215 static void send_close_req(struct cxgbi_sock *csk)
217 struct sk_buff *skb = csk->cpl_close;
218 struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
219 unsigned int tid = csk->tid;
221 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
222 "csk 0x%p,%u,0x%lx,%u.\n",
223 csk, csk->state, csk->flags, csk->tid);
225 csk->cpl_close = NULL;
226 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
227 req->wr.wr_lo = htonl(V_WR_TID(tid));
228 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
229 req->rsvd = htonl(csk->write_seq);
231 cxgbi_sock_skb_entail(csk, skb);
232 if (csk->state >= CTP_ESTABLISHED)
233 push_tx_frames(csk, 1);
237 * CPL connection abort request: host ->
239 * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs
240 * for the same connection and also that we do not try to send a message
241 * after the connection has closed.
243 static void abort_arp_failure(struct t3cdev *tdev, struct sk_buff *skb)
245 struct cpl_abort_req *req = cplhdr(skb);
247 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
248 "t3dev 0x%p, tid %u, skb 0x%p.\n",
249 tdev, GET_TID(req), skb);
250 req->cmd = CPL_ABORT_NO_RST;
251 cxgb3_ofld_send(tdev, skb);
254 static void send_abort_req(struct cxgbi_sock *csk)
256 struct sk_buff *skb = csk->cpl_abort_req;
257 struct cpl_abort_req *req;
259 if (unlikely(csk->state == CTP_ABORTING || !skb))
261 cxgbi_sock_set_state(csk, CTP_ABORTING);
262 cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
263 /* Purge the send queue so we don't send anything after an abort. */
264 cxgbi_sock_purge_write_queue(csk);
266 csk->cpl_abort_req = NULL;
267 req = (struct cpl_abort_req *)skb->head;
268 skb->priority = CPL_PRIORITY_DATA;
269 set_arp_failure_handler(skb, abort_arp_failure);
270 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
271 req->wr.wr_lo = htonl(V_WR_TID(csk->tid));
272 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
273 req->rsvd0 = htonl(csk->snd_nxt);
274 req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
275 req->cmd = CPL_ABORT_SEND_RST;
277 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
278 "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
279 csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
282 l2t_send(csk->cdev->lldev, skb, csk->l2t);
286 * CPL connection abort reply: host ->
288 * Send an ABORT_RPL message in response of the ABORT_REQ received.
290 static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
292 struct sk_buff *skb = csk->cpl_abort_rpl;
293 struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
295 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
296 "csk 0x%p,%u,0x%lx,%u, status %d.\n",
297 csk, csk->state, csk->flags, csk->tid, rst_status);
299 csk->cpl_abort_rpl = NULL;
300 skb->priority = CPL_PRIORITY_DATA;
301 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
302 rpl->wr.wr_lo = htonl(V_WR_TID(csk->tid));
303 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
304 rpl->cmd = rst_status;
305 cxgb3_ofld_send(csk->cdev->lldev, skb);
309 * CPL connection rx data ack: host ->
310 * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
313 static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
316 struct cpl_rx_data_ack *req;
317 u32 dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1);
319 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
320 "csk 0x%p,%u,0x%lx,%u, credit %u, dack %u.\n",
321 csk, csk->state, csk->flags, csk->tid, credits, dack);
323 skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
325 pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
328 req = (struct cpl_rx_data_ack *)skb->head;
329 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
330 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid));
331 req->credit_dack = htonl(F_RX_DACK_CHANGE | V_RX_DACK_MODE(1) |
332 V_RX_CREDITS(credits));
333 skb->priority = CPL_PRIORITY_ACK;
334 cxgb3_ofld_send(csk->cdev->lldev, skb);
339 * CPL connection tx data: host ->
341 * Send iscsi PDU via TX_DATA CPL message. Returns the number of
343 * Each TX_DATA consumes work request credit (wrs), so we need to keep track of
344 * how many we've used so far and how many are pending (i.e., yet ack'ed by T3).
347 static unsigned int wrlen __read_mostly;
348 static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly;
350 static void init_wr_tab(unsigned int wr_len)
354 if (skb_wrs[1]) /* already initialized */
356 for (i = 1; i < SKB_WR_LIST_SIZE; i++) {
357 int sgl_len = (3 * i) / 2 + (i & 1);
360 skb_wrs[i] = (sgl_len <= wr_len
361 ? 1 : 1 + (sgl_len - 2) / (wr_len - 1));
366 static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
367 int len, int req_completion)
369 struct tx_data_wr *req;
370 struct l2t_entry *l2t = csk->l2t;
372 skb_reset_transport_header(skb);
373 req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req));
374 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) |
375 (req_completion ? F_WR_COMPL : 0));
376 req->wr_lo = htonl(V_WR_TID(csk->tid));
377 /* len includes the length of any HW ULP additions */
378 req->len = htonl(len);
379 /* V_TX_ULP_SUBMODE sets both the mode and submode */
380 req->flags = htonl(V_TX_ULP_SUBMODE(cxgbi_skcb_ulp_mode(skb)) |
381 V_TX_SHOVE((skb_peek(&csk->write_queue) ? 0 : 1)));
382 req->sndseq = htonl(csk->snd_nxt);
383 req->param = htonl(V_TX_PORT(l2t->smt_idx));
385 if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
386 req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT |
387 V_TX_CPU_IDX(csk->rss_qid));
388 /* sendbuffer is in units of 32KB. */
389 req->param |= htonl(V_TX_SNDBUF(cxgb3i_snd_win >> 15));
390 cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
395 * push_tx_frames -- start transmit
396 * @c3cn: the offloaded connection
397 * @req_completion: request wr_ack or not
399 * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a
400 * connection's send queue and sends them on to T3. Must be called with the
401 * connection's lock held. Returns the amount of send buffer space that was
402 * freed as a result of sending queued data to T3.
405 static void arp_failure_skb_discard(struct t3cdev *dev, struct sk_buff *skb)
410 static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
415 if (unlikely(csk->state < CTP_ESTABLISHED ||
416 csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
417 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
418 "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
419 csk, csk->state, csk->flags, csk->tid);
423 while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
424 int len = skb->len; /* length before skb_push */
425 int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len);
426 int wrs_needed = skb_wrs[frags];
428 if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen)
431 WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1);
433 if (csk->wr_cred < wrs_needed) {
434 log_debug(1 << CXGBI_DBG_PDU_TX,
435 "csk 0x%p, skb len %u/%u, frag %u, wr %d<%u.\n",
436 csk, skb->len, skb->data_len, frags,
437 wrs_needed, csk->wr_cred);
441 __skb_unlink(skb, &csk->write_queue);
442 skb->priority = CPL_PRIORITY_DATA;
443 skb->csum = wrs_needed; /* remember this until the WR_ACK */
444 csk->wr_cred -= wrs_needed;
445 csk->wr_una_cred += wrs_needed;
446 cxgbi_sock_enqueue_wr(csk, skb);
448 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
449 "csk 0x%p, enqueue, skb len %u/%u, frag %u, wr %d, "
450 "left %u, unack %u.\n",
451 csk, skb->len, skb->data_len, frags, skb->csum,
452 csk->wr_cred, csk->wr_una_cred);
454 if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
455 if ((req_completion &&
456 csk->wr_una_cred == wrs_needed) ||
457 csk->wr_una_cred >= csk->wr_max_cred / 2) {
459 csk->wr_una_cred = 0;
461 len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
462 make_tx_data_wr(csk, skb, len, req_completion);
464 cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
466 total_size += skb->truesize;
467 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
468 "csk 0x%p, tid 0x%x, send skb 0x%p.\n",
470 set_arp_failure_handler(skb, arp_failure_skb_discard);
471 l2t_send(csk->cdev->lldev, skb, csk->l2t);
477 * Process a CPL_ACT_ESTABLISH message: -> host
478 * Updates connection state from an active establish CPL message. Runs with
479 * the connection lock held.
482 static inline void free_atid(struct cxgbi_sock *csk)
484 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
485 cxgb3_free_atid(csk->cdev->lldev, csk->atid);
486 cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
491 static int do_act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
493 struct cxgbi_sock *csk = ctx;
494 struct cpl_act_establish *req = cplhdr(skb);
495 unsigned int tid = GET_TID(req);
496 unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
497 u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */
499 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
500 "atid 0x%x,tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
501 atid, atid, csk, csk->state, csk->flags, rcv_isn);
504 cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
506 cxgb3_insert_tid(csk->cdev->lldev, &t3_client, csk, tid);
510 csk->rss_qid = G_QNUM(ntohs(skb->csum));
512 spin_lock_bh(&csk->lock);
513 if (csk->retry_timer.function) {
514 del_timer(&csk->retry_timer);
515 csk->retry_timer.function = NULL;
518 if (unlikely(csk->state != CTP_ACTIVE_OPEN))
519 pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
520 csk, csk->state, csk->flags, csk->tid);
522 csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
523 if (cxgb3i_rcv_win > (M_RCV_BUFSIZ << 10))
524 csk->rcv_wup -= cxgb3i_rcv_win - (M_RCV_BUFSIZ << 10);
526 cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
528 if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
529 /* upper layer has requested closing */
532 if (skb_queue_len(&csk->write_queue))
533 push_tx_frames(csk, 1);
534 cxgbi_conn_tx_open(csk);
537 spin_unlock_bh(&csk->lock);
543 * Process a CPL_ACT_OPEN_RPL message: -> host
544 * Handle active open failures.
546 static int act_open_rpl_status_to_errno(int status)
549 case CPL_ERR_CONN_RESET:
550 return -ECONNREFUSED;
551 case CPL_ERR_ARP_MISS:
552 return -EHOSTUNREACH;
553 case CPL_ERR_CONN_TIMEDOUT:
555 case CPL_ERR_TCAM_FULL:
557 case CPL_ERR_CONN_EXIST:
564 static void act_open_retry_timer(unsigned long data)
567 struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
569 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
570 "csk 0x%p,%u,0x%lx,%u.\n",
571 csk, csk->state, csk->flags, csk->tid);
574 spin_lock_bh(&csk->lock);
575 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC);
577 cxgbi_sock_fail_act_open(csk, -ENOMEM);
579 skb->sk = (struct sock *)csk;
580 set_arp_failure_handler(skb, act_open_arp_failure);
581 send_act_open_req(csk, skb, csk->l2t);
583 spin_unlock_bh(&csk->lock);
587 static int do_act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
589 struct cxgbi_sock *csk = ctx;
590 struct cpl_act_open_rpl *rpl = cplhdr(skb);
592 pr_info("csk 0x%p,%u,0x%lx,%u, status %u, %pI4:%u-%pI4:%u.\n",
593 csk, csk->state, csk->flags, csk->atid, rpl->status,
594 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
595 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port));
597 if (rpl->status != CPL_ERR_TCAM_FULL &&
598 rpl->status != CPL_ERR_CONN_EXIST &&
599 rpl->status != CPL_ERR_ARP_MISS)
600 cxgb3_queue_tid_release(tdev, GET_TID(rpl));
603 spin_lock_bh(&csk->lock);
604 if (rpl->status == CPL_ERR_CONN_EXIST &&
605 csk->retry_timer.function != act_open_retry_timer) {
606 csk->retry_timer.function = act_open_retry_timer;
607 mod_timer(&csk->retry_timer, jiffies + HZ / 2);
609 cxgbi_sock_fail_act_open(csk,
610 act_open_rpl_status_to_errno(rpl->status));
612 spin_unlock_bh(&csk->lock);
619 * Process PEER_CLOSE CPL messages: -> host
622 static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
624 struct cxgbi_sock *csk = ctx;
626 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
627 "csk 0x%p,%u,0x%lx,%u.\n",
628 csk, csk->state, csk->flags, csk->tid);
630 cxgbi_sock_rcv_peer_close(csk);
636 * Process CLOSE_CONN_RPL CPL message: -> host
637 * Process a peer ACK to our FIN.
639 static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb,
642 struct cxgbi_sock *csk = ctx;
643 struct cpl_close_con_rpl *rpl = cplhdr(skb);
645 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
646 "csk 0x%p,%u,0x%lx,%u, snxt %u.\n",
647 csk, csk->state, csk->flags, csk->tid, ntohl(rpl->snd_nxt));
649 cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
655 * Process ABORT_REQ_RSS CPL message: -> host
656 * Process abort requests. If we are waiting for an ABORT_RPL we ignore this
657 * request except that we need to reply to it.
660 static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
663 switch (abort_reason) {
664 case CPL_ERR_BAD_SYN: /* fall through */
665 case CPL_ERR_CONN_RESET:
666 return csk->state > CTP_ESTABLISHED ? -EPIPE : -ECONNRESET;
667 case CPL_ERR_XMIT_TIMEDOUT:
668 case CPL_ERR_PERSIST_TIMEDOUT:
669 case CPL_ERR_FINWAIT2_TIMEDOUT:
670 case CPL_ERR_KEEPALIVE_TIMEDOUT:
677 static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
679 const struct cpl_abort_req_rss *req = cplhdr(skb);
680 struct cxgbi_sock *csk = ctx;
681 int rst_status = CPL_ABORT_NO_RST;
683 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
684 "csk 0x%p,%u,0x%lx,%u.\n",
685 csk, csk->state, csk->flags, csk->tid);
687 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
688 req->status == CPL_ERR_PERSIST_NEG_ADVICE) {
693 spin_lock_bh(&csk->lock);
695 if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
696 cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
697 cxgbi_sock_set_state(csk, CTP_ABORTING);
701 cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
702 send_abort_rpl(csk, rst_status);
704 if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
705 csk->err = abort_status_to_errno(csk, req->status, &rst_status);
706 cxgbi_sock_closed(csk);
710 spin_unlock_bh(&csk->lock);
718 * Process ABORT_RPL_RSS CPL message: -> host
719 * Process abort replies. We only process these messages if we anticipate
720 * them as the coordination between SW and HW in this area is somewhat lacking
721 * and sometimes we get ABORT_RPLs after we are done with the connection that
722 * originated the ABORT_REQ.
724 static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
726 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
727 struct cxgbi_sock *csk = ctx;
729 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
730 "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
731 rpl->status, csk, csk ? csk->state : 0,
732 csk ? csk->flags : 0UL);
734 * Ignore replies to post-close aborts indicating that the abort was
735 * requested too late. These connections are terminated when we get
736 * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss
737 * arrives the TID is either no longer used or it has been recycled.
739 if (rpl->status == CPL_ERR_ABORT_FAILED)
742 * Sometimes we've already closed the connection, e.g., a post-close
743 * abort races with ABORT_REQ_RSS, the latter frees the connection
744 * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED,
745 * but FW turns the ABORT_REQ into a regular one and so we get
746 * ABORT_RPL_RSS with status 0 and no connection.
749 cxgbi_sock_rcv_abort_rpl(csk);
756 * Process RX_ISCSI_HDR CPL message: -> host
757 * Handle received PDUs, the payload could be DDP'ed. If not, the payload
758 * follow after the bhs.
760 static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx)
762 struct cxgbi_sock *csk = ctx;
763 struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb);
764 struct cpl_iscsi_hdr_norss data_cpl;
765 struct cpl_rx_data_ddp_norss ddp_cpl;
766 unsigned int hdr_len, data_len, status;
770 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
771 "csk 0x%p,%u,0x%lx,%u, skb 0x%p,%u.\n",
772 csk, csk->state, csk->flags, csk->tid, skb, skb->len);
774 spin_lock_bh(&csk->lock);
776 if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
777 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
778 "csk 0x%p,%u,0x%lx,%u, bad state.\n",
779 csk, csk->state, csk->flags, csk->tid);
780 if (csk->state != CTP_ABORTING)
786 cxgbi_skcb_tcp_seq(skb) = ntohl(hdr_cpl->seq);
787 cxgbi_skcb_flags(skb) = 0;
789 skb_reset_transport_header(skb);
790 __skb_pull(skb, sizeof(struct cpl_iscsi_hdr));
792 len = hdr_len = ntohs(hdr_cpl->len);
793 /* msg coalesce is off or not enough data received */
794 if (skb->len <= hdr_len) {
795 pr_err("%s: tid %u, CPL_ISCSI_HDR, skb len %u < %u.\n",
796 csk->cdev->ports[csk->port_id]->name, csk->tid,
800 cxgbi_skcb_set_flag(skb, SKCBF_RX_COALESCED);
802 err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl,
805 pr_err("%s: tid %u, copy cpl_ddp %u-%zu failed %d.\n",
806 csk->cdev->ports[csk->port_id]->name, csk->tid,
807 skb->len, sizeof(ddp_cpl), err);
811 cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
812 cxgbi_skcb_rx_pdulen(skb) = ntohs(ddp_cpl.len);
813 cxgbi_skcb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc);
814 status = ntohl(ddp_cpl.ddp_status);
816 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
817 "csk 0x%p, skb 0x%p,%u, pdulen %u, status 0x%x.\n",
818 csk, skb, skb->len, cxgbi_skcb_rx_pdulen(skb), status);
820 if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT))
821 cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
822 if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT))
823 cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
824 if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT))
825 cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
827 if (skb->len > (hdr_len + sizeof(ddp_cpl))) {
828 err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl));
830 pr_err("%s: tid %u, cp %zu/%u failed %d.\n",
831 csk->cdev->ports[csk->port_id]->name,
832 csk->tid, sizeof(data_cpl), skb->len, err);
835 data_len = ntohs(data_cpl.len);
836 log_debug(1 << CXGBI_DBG_DDP | 1 << CXGBI_DBG_PDU_RX,
837 "skb 0x%p, pdu not ddp'ed %u/%u, status 0x%x.\n",
838 skb, data_len, cxgbi_skcb_rx_pdulen(skb), status);
839 len += sizeof(data_cpl) + data_len;
840 } else if (status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT))
841 cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
843 csk->rcv_nxt = ntohl(ddp_cpl.seq) + cxgbi_skcb_rx_pdulen(skb);
844 __pskb_trim(skb, len);
845 __skb_queue_tail(&csk->receive_queue, skb);
846 cxgbi_conn_pdu_ready(csk);
848 spin_unlock_bh(&csk->lock);
854 spin_unlock_bh(&csk->lock);
860 * Process TX_DATA_ACK CPL messages: -> host
861 * Process an acknowledgment of WR completion. Advance snd_una and send the
862 * next batch of work requests from the write queue.
864 static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx)
866 struct cxgbi_sock *csk = ctx;
867 struct cpl_wr_ack *hdr = cplhdr(skb);
869 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
870 "csk 0x%p,%u,0x%lx,%u, cr %u.\n",
871 csk, csk->state, csk->flags, csk->tid, ntohs(hdr->credits));
873 cxgbi_sock_rcv_wr_ack(csk, ntohs(hdr->credits), ntohl(hdr->snd_una), 1);
879 * for each connection, pre-allocate skbs needed for close/abort requests. So
880 * that we can service the request right away.
882 static int alloc_cpls(struct cxgbi_sock *csk)
884 csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 0,
888 csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 0,
890 if (!csk->cpl_abort_req)
893 csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 0,
895 if (!csk->cpl_abort_rpl)
901 cxgbi_sock_free_cpl_skbs(csk);
906 * release_offload_resources - release offload resource
907 * @c3cn: the offloaded iscsi tcp connection.
908 * Release resources held by an offload connection (TID, L2T entry, etc.)
910 static void l2t_put(struct cxgbi_sock *csk)
912 struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev;
915 l2t_release(L2DATA(t3dev), csk->l2t);
921 static void release_offload_resources(struct cxgbi_sock *csk)
923 struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev;
925 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
926 "csk 0x%p,%u,0x%lx,%u.\n",
927 csk, csk->state, csk->flags, csk->tid);
930 cxgbi_sock_free_cpl_skbs(csk);
932 if (csk->wr_cred != csk->wr_max_cred) {
933 cxgbi_sock_purge_wr_queue(csk);
934 cxgbi_sock_reset_wr_list(csk);
937 if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
939 else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
940 cxgb3_remove_tid(t3dev, (void *)csk, csk->tid);
941 cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
948 static void update_address(struct cxgbi_hba *chba)
950 if (chba->ipv4addr) {
952 chba->ipv4addr != cxgb3i_get_private_ipv4addr(chba->vdev)) {
953 cxgb3i_set_private_ipv4addr(chba->vdev, chba->ipv4addr);
954 cxgb3i_set_private_ipv4addr(chba->ndev, 0);
955 pr_info("%s set %pI4.\n",
956 chba->vdev->name, &chba->ipv4addr);
957 } else if (chba->ipv4addr !=
958 cxgb3i_get_private_ipv4addr(chba->ndev)) {
959 cxgb3i_set_private_ipv4addr(chba->ndev, chba->ipv4addr);
960 pr_info("%s set %pI4.\n",
961 chba->ndev->name, &chba->ipv4addr);
963 } else if (cxgb3i_get_private_ipv4addr(chba->ndev)) {
965 cxgb3i_set_private_ipv4addr(chba->vdev, 0);
966 cxgb3i_set_private_ipv4addr(chba->ndev, 0);
970 static int init_act_open(struct cxgbi_sock *csk)
972 struct dst_entry *dst = csk->dst;
973 struct cxgbi_device *cdev = csk->cdev;
974 struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev;
975 struct net_device *ndev = cdev->ports[csk->port_id];
976 struct cxgbi_hba *chba = cdev->hbas[csk->port_id];
977 struct sk_buff *skb = NULL;
979 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
980 "csk 0x%p,%u,0x%lx.\n", csk, csk->state, csk->flags);
982 update_address(chba);
984 csk->saddr.sin_addr.s_addr = chba->ipv4addr;
987 csk->l2t = t3_l2t_get(t3dev, dst->neighbour, ndev);
989 pr_err("NO l2t available.\n");
994 csk->atid = cxgb3_alloc_atid(t3dev, &t3_client, csk);
996 pr_err("NO atid available.\n");
999 cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
1000 cxgbi_sock_get(csk);
1002 skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL);
1005 skb->sk = (struct sock *)csk;
1006 set_arp_failure_handler(skb, act_open_arp_failure);
1008 csk->wr_max_cred = csk->wr_cred = T3C_DATA(t3dev)->max_wrs - 1;
1009 csk->wr_una_cred = 0;
1010 csk->mss_idx = cxgbi_sock_select_mss(csk, dst_mtu(dst));
1011 cxgbi_sock_reset_wr_list(csk);
1014 log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
1015 "csk 0x%p,%u,0x%lx, %pI4:%u-%pI4:%u.\n",
1016 csk, csk->state, csk->flags,
1017 &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
1018 &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port));
1020 cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1021 send_act_open_req(csk, skb, csk->l2t);
1030 cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS] = {
1031 [CPL_ACT_ESTABLISH] = do_act_establish,
1032 [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
1033 [CPL_PEER_CLOSE] = do_peer_close,
1034 [CPL_ABORT_REQ_RSS] = do_abort_req,
1035 [CPL_ABORT_RPL_RSS] = do_abort_rpl,
1036 [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
1037 [CPL_TX_DMA_ACK] = do_wr_ack,
1038 [CPL_ISCSI_HDR] = do_iscsi_hdr,
1042 * cxgb3i_ofld_init - allocate and initialize resources for each adapter found
1043 * @cdev: cxgbi adapter
1045 int cxgb3i_ofld_init(struct cxgbi_device *cdev)
1047 struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev;
1048 struct adap_ports port;
1049 struct ofld_page_info rx_page_info;
1050 unsigned int wr_len;
1053 if (t3dev->ctl(t3dev, GET_WR_LEN, &wr_len) < 0 ||
1054 t3dev->ctl(t3dev, GET_PORTS, &port) < 0 ||
1055 t3dev->ctl(t3dev, GET_RX_PAGE_INFO, &rx_page_info) < 0) {
1056 pr_warn("t3 0x%p, offload up, ioctl failed.\n", t3dev);
1060 if (cxgb3i_max_connect > CXGBI_MAX_CONN)
1061 cxgb3i_max_connect = CXGBI_MAX_CONN;
1063 rc = cxgbi_device_portmap_create(cdev, cxgb3i_sport_base,
1064 cxgb3i_max_connect);
1068 init_wr_tab(wr_len);
1069 cdev->csk_release_offload_resources = release_offload_resources;
1070 cdev->csk_push_tx_frames = push_tx_frames;
1071 cdev->csk_send_abort_req = send_abort_req;
1072 cdev->csk_send_close_req = send_close_req;
1073 cdev->csk_send_rx_credits = send_rx_credits;
1074 cdev->csk_alloc_cpls = alloc_cpls;
1075 cdev->csk_init_act_open = init_act_open;
1077 pr_info("cdev 0x%p, offload up, added.\n", cdev);
1082 * functions to program the pagepod in h/w
1084 static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr)
1086 struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head;
1088 memset(req, 0, sizeof(*req));
1090 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS));
1091 req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) |
1092 V_ULPTX_CMD(ULP_MEM_WRITE));
1093 req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) |
1094 V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1));
1097 static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
1098 unsigned int idx, unsigned int npods,
1099 struct cxgbi_gather_list *gl)
1101 struct cxgbi_device *cdev = csk->cdev;
1102 struct cxgbi_ddp_info *ddp = cdev->ddp;
1103 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
1106 log_debug(1 << CXGBI_DBG_DDP,
1107 "csk 0x%p, idx %u, npods %u, gl 0x%p.\n",
1108 csk, idx, npods, gl);
1110 for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) {
1111 struct sk_buff *skb = ddp->gl_skb[idx];
1113 /* hold on to the skb until we clear the ddp mapping */
1116 ulp_mem_io_set_hdr(skb, pm_addr);
1117 cxgbi_ddp_ppod_set((struct cxgbi_pagepod *)(skb->head +
1118 sizeof(struct ulp_mem_io)),
1119 hdr, gl, i * PPOD_PAGES_MAX);
1120 skb->priority = CPL_PRIORITY_CONTROL;
1121 cxgb3_ofld_send(cdev->lldev, skb);
1126 static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
1127 unsigned int idx, unsigned int npods)
1129 struct cxgbi_device *cdev = chba->cdev;
1130 struct cxgbi_ddp_info *ddp = cdev->ddp;
1131 unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
1134 log_debug(1 << CXGBI_DBG_DDP,
1135 "cdev 0x%p, idx %u, npods %u, tag 0x%x.\n",
1136 cdev, idx, npods, tag);
1138 for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) {
1139 struct sk_buff *skb = ddp->gl_skb[idx];
1142 pr_err("tag 0x%x, 0x%x, %d/%u, skb NULL.\n",
1143 tag, idx, i, npods);
1146 ddp->gl_skb[idx] = NULL;
1147 memset(skb->head + sizeof(struct ulp_mem_io), 0, PPOD_SIZE);
1148 ulp_mem_io_set_hdr(skb, pm_addr);
1149 skb->priority = CPL_PRIORITY_CONTROL;
1150 cxgb3_ofld_send(cdev->lldev, skb);
1154 static void ddp_free_gl_skb(struct cxgbi_ddp_info *ddp, int idx, int cnt)
1158 log_debug(1 << CXGBI_DBG_DDP,
1159 "ddp 0x%p, idx %d, cnt %d.\n", ddp, idx, cnt);
1161 for (i = 0; i < cnt; i++, idx++)
1162 if (ddp->gl_skb[idx]) {
1163 kfree_skb(ddp->gl_skb[idx]);
1164 ddp->gl_skb[idx] = NULL;
1168 static int ddp_alloc_gl_skb(struct cxgbi_ddp_info *ddp, int idx,
1173 log_debug(1 << CXGBI_DBG_DDP,
1174 "ddp 0x%p, idx %d, cnt %d.\n", ddp, idx, cnt);
1176 for (i = 0; i < cnt; i++) {
1177 struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) +
1180 ddp->gl_skb[idx + i] = skb;
1182 ddp_free_gl_skb(ddp, idx, i);
1189 static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk,
1190 unsigned int tid, int pg_idx, bool reply)
1192 struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0,
1194 struct cpl_set_tcb_field *req;
1195 u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0;
1197 log_debug(1 << CXGBI_DBG_DDP,
1198 "csk 0x%p, tid %u, pg_idx %d.\n", csk, tid, pg_idx);
1202 /* set up ulp submode and page size */
1203 req = (struct cpl_set_tcb_field *)skb->head;
1204 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1205 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1206 req->reply = V_NO_REPLY(reply ? 0 : 1);
1208 req->word = htons(31);
1209 req->mask = cpu_to_be64(0xF0000000);
1210 req->val = cpu_to_be64(val << 28);
1211 skb->priority = CPL_PRIORITY_CONTROL;
1213 cxgb3_ofld_send(csk->cdev->lldev, skb);
1218 * cxgb3i_setup_conn_digest - setup conn. digest setting
1219 * @csk: cxgb tcp socket
1220 * @tid: connection id
1221 * @hcrc: header digest enabled
1222 * @dcrc: data digest enabled
1223 * @reply: request reply from h/w
1224 * set up the iscsi digest settings for a connection identified by tid
1226 static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
1227 int hcrc, int dcrc, int reply)
1229 struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0,
1231 struct cpl_set_tcb_field *req;
1232 u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0);
1234 log_debug(1 << CXGBI_DBG_DDP,
1235 "csk 0x%p, tid %u, crc %d,%d.\n", csk, tid, hcrc, dcrc);
1239 /* set up ulp submode and page size */
1240 req = (struct cpl_set_tcb_field *)skb->head;
1241 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1242 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1243 req->reply = V_NO_REPLY(reply ? 0 : 1);
1245 req->word = htons(31);
1246 req->mask = cpu_to_be64(0x0F000000);
1247 req->val = cpu_to_be64(val << 24);
1248 skb->priority = CPL_PRIORITY_CONTROL;
1250 cxgb3_ofld_send(csk->cdev->lldev, skb);
1255 * t3_ddp_cleanup - release the cxgb3 adapter's ddp resource
1256 * @cdev: cxgb3i adapter
1257 * release all the resource held by the ddp pagepod manager for a given
1261 static void t3_ddp_cleanup(struct cxgbi_device *cdev)
1263 struct t3cdev *tdev = (struct t3cdev *)cdev->lldev;
1265 if (cxgbi_ddp_cleanup(cdev)) {
1266 pr_info("t3dev 0x%p, ulp_iscsi no more user.\n", tdev);
1267 tdev->ulp_iscsi = NULL;
1272 * ddp_init - initialize the cxgb3 adapter's ddp resource
1273 * @cdev: cxgb3i adapter
1274 * initialize the ddp pagepod manager for a given adapter
1276 static int cxgb3i_ddp_init(struct cxgbi_device *cdev)
1278 struct t3cdev *tdev = (struct t3cdev *)cdev->lldev;
1279 struct cxgbi_ddp_info *ddp = tdev->ulp_iscsi;
1280 struct ulp_iscsi_info uinfo;
1281 unsigned int pgsz_factor[4];
1285 kref_get(&ddp->refcnt);
1286 pr_warn("t3dev 0x%p, ddp 0x%p already set up.\n",
1287 tdev, tdev->ulp_iscsi);
1292 err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo);
1294 pr_err("%s, failed to get iscsi param err=%d.\n",
1299 err = cxgbi_ddp_init(cdev, uinfo.llimit, uinfo.ulimit,
1300 uinfo.max_txsz, uinfo.max_rxsz);
1306 uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
1307 cxgbi_ddp_page_size_factor(pgsz_factor);
1308 uinfo.ulimit = uinfo.llimit + (ddp->nppods << PPOD_SIZE_SHIFT);
1310 err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo);
1312 pr_warn("%s unable to set iscsi param err=%d, ddp disabled.\n",
1314 cxgbi_ddp_cleanup(cdev);
1317 tdev->ulp_iscsi = ddp;
1319 cdev->csk_ddp_free_gl_skb = ddp_free_gl_skb;
1320 cdev->csk_ddp_alloc_gl_skb = ddp_alloc_gl_skb;
1321 cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
1322 cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1323 cdev->csk_ddp_set = ddp_set_map;
1324 cdev->csk_ddp_clear = ddp_clear_map;
1326 pr_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
1328 tdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
1329 ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz,
1330 ddp->max_rxsz, uinfo.max_rxsz);
1334 static void cxgb3i_dev_close(struct t3cdev *t3dev)
1336 struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev);
1338 if (!cdev || cdev->flags & CXGBI_FLAG_ADAPTER_RESET) {
1339 pr_info("0x%p close, f 0x%x.\n", cdev, cdev ? cdev->flags : 0);
1343 cxgbi_device_unregister(cdev);
1347 * cxgb3i_dev_open - init a t3 adapter structure and any h/w settings
1348 * @t3dev: t3cdev adapter
1350 static void cxgb3i_dev_open(struct t3cdev *t3dev)
1352 struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev);
1353 struct adapter *adapter = tdev2adap(t3dev);
1357 pr_info("0x%p, updating.\n", cdev);
1361 cdev = cxgbi_device_register(0, adapter->params.nports);
1363 pr_warn("device 0x%p register failed.\n", t3dev);
1367 cdev->flags = CXGBI_FLAG_DEV_T3 | CXGBI_FLAG_IPV4_SET;
1368 cdev->lldev = t3dev;
1369 cdev->pdev = adapter->pdev;
1370 cdev->ports = adapter->port;
1371 cdev->nports = adapter->params.nports;
1372 cdev->mtus = adapter->params.mtus;
1373 cdev->nmtus = NMTUS;
1374 cdev->snd_win = cxgb3i_snd_win;
1375 cdev->rcv_win = cxgb3i_rcv_win;
1376 cdev->rx_credit_thres = cxgb3i_rx_credit_thres;
1377 cdev->skb_tx_rsvd = CXGB3I_TX_HEADER_LEN;
1378 cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr_norss);
1379 cdev->dev_ddp_cleanup = t3_ddp_cleanup;
1380 cdev->itp = &cxgb3i_iscsi_transport;
1382 err = cxgb3i_ddp_init(cdev);
1384 pr_info("0x%p ddp init failed\n", cdev);
1388 err = cxgb3i_ofld_init(cdev);
1390 pr_info("0x%p offload init failed\n", cdev);
1394 err = cxgbi_hbas_add(cdev, CXGB3I_MAX_LUN, CXGBI_MAX_CONN,
1395 &cxgb3i_host_template, cxgb3i_stt);
1399 for (i = 0; i < cdev->nports; i++)
1400 cdev->hbas[i]->ipv4addr =
1401 cxgb3i_get_private_ipv4addr(cdev->ports[i]);
1403 pr_info("cdev 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n",
1404 cdev, cdev ? cdev->flags : 0, t3dev, err);
1408 cxgbi_device_unregister(cdev);
1411 static void cxgb3i_dev_event_handler(struct t3cdev *t3dev, u32 event, u32 port)
1413 struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev);
1415 log_debug(1 << CXGBI_DBG_TOE,
1416 "0x%p, cdev 0x%p, event 0x%x, port 0x%x.\n",
1417 t3dev, cdev, event, port);
1422 case OFFLOAD_STATUS_DOWN:
1423 cdev->flags |= CXGBI_FLAG_ADAPTER_RESET;
1425 case OFFLOAD_STATUS_UP:
1426 cdev->flags &= ~CXGBI_FLAG_ADAPTER_RESET;
1432 * cxgb3i_init_module - module init entry point
1434 * initialize any driver wide global data structures and register itself
1435 * with the cxgb3 module
1437 static int __init cxgb3i_init_module(void)
1441 printk(KERN_INFO "%s", version);
1443 rc = cxgbi_iscsi_init(&cxgb3i_iscsi_transport, &cxgb3i_stt);
1447 cxgb3_register_client(&t3_client);
1452 * cxgb3i_exit_module - module cleanup/exit entry point
1454 * go through the driver hba list and for each hba, release any resource held.
1455 * and unregisters iscsi transport and the cxgb3 module
1457 static void __exit cxgb3i_exit_module(void)
1459 cxgb3_unregister_client(&t3_client);
1460 cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T3);
1461 cxgbi_iscsi_cleanup(&cxgb3i_iscsi_transport, &cxgb3i_stt);
1464 module_init(cxgb3i_init_module);
1465 module_exit(cxgb3i_exit_module);