7b36b6e0 |
1 | /* |
2 | * cxgb4i.c: Chelsio T4 iSCSI driver. |
3 | * |
4 | * Copyright (c) 2010 Chelsio Communications, Inc. |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation. |
9 | * |
10 | * Written by: Karen Xie (kxie@chelsio.com) |
11 | * Rakesh Ranjan (rranjan@chelsio.com) |
12 | */ |
13 | |
14 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
15 | |
16 | #include <linux/version.h> |
17 | #include <linux/module.h> |
18 | #include <linux/moduleparam.h> |
19 | #include <scsi/scsi_host.h> |
20 | #include <net/tcp.h> |
21 | #include <net/dst.h> |
22 | #include <linux/netdevice.h> |
23 | |
24 | #include "t4_msg.h" |
25 | #include "cxgb4.h" |
26 | #include "cxgb4_uld.h" |
27 | #include "t4fw_api.h" |
28 | #include "l2t.h" |
29 | #include "cxgb4i.h" |
30 | |
31 | static unsigned int dbg_level; |
32 | |
33 | #include "../libcxgbi.h" |
34 | |
35 | #define DRV_MODULE_NAME "cxgb4i" |
36 | #define DRV_MODULE_DESC "Chelsio T4 iSCSI Driver" |
37 | #define DRV_MODULE_VERSION "0.9.0" |
38 | #define DRV_MODULE_RELDATE "May 2010" |
39 | |
40 | static char version[] = |
41 | DRV_MODULE_DESC " " DRV_MODULE_NAME |
42 | " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
43 | |
44 | MODULE_AUTHOR("Chelsio Communications, Inc."); |
45 | MODULE_DESCRIPTION(DRV_MODULE_DESC); |
46 | MODULE_VERSION(DRV_MODULE_VERSION); |
47 | MODULE_LICENSE("GPL"); |
48 | |
49 | module_param(dbg_level, uint, 0644); |
50 | MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); |
51 | |
52 | static int cxgb4i_rcv_win = 256 * 1024; |
53 | module_param(cxgb4i_rcv_win, int, 0644); |
54 | MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); |
55 | |
56 | static int cxgb4i_snd_win = 128 * 1024; |
57 | module_param(cxgb4i_snd_win, int, 0644); |
58 | MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); |
59 | |
60 | static int cxgb4i_rx_credit_thres = 10 * 1024; |
61 | module_param(cxgb4i_rx_credit_thres, int, 0644); |
62 | MODULE_PARM_DESC(cxgb4i_rx_credit_thres, |
63 | "RX credits return threshold in bytes (default=10KB)"); |
64 | |
65 | static unsigned int cxgb4i_max_connect = (8 * 1024); |
66 | module_param(cxgb4i_max_connect, uint, 0644); |
67 | MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); |
68 | |
69 | static unsigned short cxgb4i_sport_base = 20000; |
70 | module_param(cxgb4i_sport_base, ushort, 0644); |
71 | MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); |
72 | |
73 | typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); |
74 | |
75 | static void *t4_uld_add(const struct cxgb4_lld_info *); |
76 | static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); |
77 | static int t4_uld_state_change(void *, enum cxgb4_state state); |
78 | |
79 | static const struct cxgb4_uld_info cxgb4i_uld_info = { |
80 | .name = DRV_MODULE_NAME, |
81 | .add = t4_uld_add, |
82 | .rx_handler = t4_uld_rx_handler, |
83 | .state_change = t4_uld_state_change, |
84 | }; |
85 | |
86 | static struct scsi_host_template cxgb4i_host_template = { |
87 | .module = THIS_MODULE, |
88 | .name = DRV_MODULE_NAME, |
89 | .proc_name = DRV_MODULE_NAME, |
90 | .can_queue = CXGB4I_SCSI_HOST_QDEPTH, |
91 | .queuecommand = iscsi_queuecommand, |
92 | .change_queue_depth = iscsi_change_queue_depth, |
93 | .sg_tablesize = SG_ALL, |
94 | .max_sectors = 0xFFFF, |
95 | .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, |
96 | .eh_abort_handler = iscsi_eh_abort, |
97 | .eh_device_reset_handler = iscsi_eh_device_reset, |
98 | .eh_target_reset_handler = iscsi_eh_recover_target, |
99 | .target_alloc = iscsi_target_alloc, |
100 | .use_clustering = DISABLE_CLUSTERING, |
101 | .this_id = -1, |
102 | }; |
103 | |
104 | static struct iscsi_transport cxgb4i_iscsi_transport = { |
105 | .owner = THIS_MODULE, |
106 | .name = DRV_MODULE_NAME, |
107 | .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | |
108 | CAP_DATADGST | CAP_DIGEST_OFFLOAD | |
109 | CAP_PADDING_OFFLOAD, |
110 | .param_mask = ISCSI_MAX_RECV_DLENGTH | ISCSI_MAX_XMIT_DLENGTH | |
111 | ISCSI_HDRDGST_EN | ISCSI_DATADGST_EN | |
112 | ISCSI_INITIAL_R2T_EN | ISCSI_MAX_R2T | |
113 | ISCSI_IMM_DATA_EN | ISCSI_FIRST_BURST | |
114 | ISCSI_MAX_BURST | ISCSI_PDU_INORDER_EN | |
115 | ISCSI_DATASEQ_INORDER_EN | ISCSI_ERL | |
116 | ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS | |
117 | ISCSI_EXP_STATSN | ISCSI_PERSISTENT_PORT | |
118 | ISCSI_PERSISTENT_ADDRESS | |
119 | ISCSI_TARGET_NAME | ISCSI_TPGT | |
120 | ISCSI_USERNAME | ISCSI_PASSWORD | |
121 | ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | |
122 | ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | |
123 | ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO | |
124 | ISCSI_PING_TMO | ISCSI_RECV_TMO | |
125 | ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, |
126 | .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | |
127 | ISCSI_HOST_INITIATOR_NAME | |
128 | ISCSI_HOST_NETDEV_NAME, |
129 | .get_host_param = cxgbi_get_host_param, |
130 | .set_host_param = cxgbi_set_host_param, |
131 | /* session management */ |
132 | .create_session = cxgbi_create_session, |
133 | .destroy_session = cxgbi_destroy_session, |
134 | .get_session_param = iscsi_session_get_param, |
135 | /* connection management */ |
136 | .create_conn = cxgbi_create_conn, |
137 | .bind_conn = cxgbi_bind_conn, |
138 | .destroy_conn = iscsi_tcp_conn_teardown, |
139 | .start_conn = iscsi_conn_start, |
140 | .stop_conn = iscsi_conn_stop, |
141 | .get_conn_param = cxgbi_get_conn_param, |
142 | .set_param = cxgbi_set_conn_param, |
143 | .get_stats = cxgbi_get_conn_stats, |
144 | /* pdu xmit req from user space */ |
145 | .send_pdu = iscsi_conn_send_pdu, |
146 | /* task */ |
147 | .init_task = iscsi_tcp_task_init, |
148 | .xmit_task = iscsi_tcp_task_xmit, |
149 | .cleanup_task = cxgbi_cleanup_task, |
150 | /* pdu */ |
151 | .alloc_pdu = cxgbi_conn_alloc_pdu, |
152 | .init_pdu = cxgbi_conn_init_pdu, |
153 | .xmit_pdu = cxgbi_conn_xmit_pdu, |
154 | .parse_pdu_itt = cxgbi_parse_pdu_itt, |
155 | /* TCP connect/disconnect */ |
156 | .ep_connect = cxgbi_ep_connect, |
157 | .ep_poll = cxgbi_ep_poll, |
158 | .ep_disconnect = cxgbi_ep_disconnect, |
159 | /* Error recovery timeout call */ |
160 | .session_recovery_timedout = iscsi_session_recovery_timedout, |
161 | }; |
162 | |
163 | static struct scsi_transport_template *cxgb4i_stt; |
164 | |
165 | /* |
166 | * CPL (Chelsio Protocol Language) defines a message passing interface between |
167 | * the host driver and Chelsio asic. |
168 | * The section below implments CPLs that related to iscsi tcp connection |
169 | * open/close/abort and data send/receive. |
170 | */ |
171 | #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) |
172 | #define RCV_BUFSIZ_MASK 0x3FFU |
173 | #define MAX_IMM_TX_PKT_LEN 128 |
174 | |
175 | static inline void set_queue(struct sk_buff *skb, unsigned int queue, |
176 | const struct cxgbi_sock *csk) |
177 | { |
178 | skb->queue_mapping = queue; |
179 | } |
180 | |
181 | static int push_tx_frames(struct cxgbi_sock *, int); |
182 | |
183 | /* |
184 | * is_ofld_imm - check whether a packet can be sent as immediate data |
185 | * @skb: the packet |
186 | * |
187 | * Returns true if a packet can be sent as an offload WR with immediate |
188 | * data. We currently use the same limit as for Ethernet packets. |
189 | */ |
190 | static inline int is_ofld_imm(const struct sk_buff *skb) |
191 | { |
192 | return skb->len <= (MAX_IMM_TX_PKT_LEN - |
193 | sizeof(struct fw_ofld_tx_data_wr)); |
194 | } |
195 | |
196 | static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, |
197 | struct l2t_entry *e) |
198 | { |
199 | struct cpl_act_open_req *req; |
200 | int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); |
201 | unsigned long long opt0; |
202 | unsigned int opt2; |
203 | unsigned int qid_atid = ((unsigned int)csk->atid) | |
204 | (((unsigned int)csk->rss_qid) << 14); |
205 | |
206 | opt0 = KEEP_ALIVE(1) | |
207 | WND_SCALE(wscale) | |
208 | MSS_IDX(csk->mss_idx) | |
209 | L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) | |
210 | TX_CHAN(csk->tx_chan) | |
211 | SMAC_SEL(csk->smac_idx) | |
212 | ULP_MODE(ULP_MODE_ISCSI) | |
213 | RCV_BUFSIZ(cxgb4i_rcv_win >> 10); |
214 | opt2 = RX_CHANNEL(0) | |
215 | RSS_QUEUE_VALID | |
216 | (1 << 20) | (1 << 22) | |
217 | RSS_QUEUE(csk->rss_qid); |
218 | |
219 | set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); |
220 | req = (struct cpl_act_open_req *)skb->head; |
221 | |
222 | INIT_TP_WR(req, 0); |
223 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, |
224 | qid_atid)); |
225 | req->local_port = csk->saddr.sin_port; |
226 | req->peer_port = csk->daddr.sin_port; |
227 | req->local_ip = csk->saddr.sin_addr.s_addr; |
228 | req->peer_ip = csk->daddr.sin_addr.s_addr; |
229 | req->opt0 = cpu_to_be64(opt0); |
230 | req->params = 0; |
231 | req->opt2 = cpu_to_be32(opt2); |
232 | |
233 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
234 | "csk 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", |
235 | csk, &req->local_ip, ntohs(req->local_port), |
236 | &req->peer_ip, ntohs(req->peer_port), |
237 | csk->atid, csk->rss_qid); |
238 | |
239 | cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); |
240 | } |
241 | |
242 | static void send_close_req(struct cxgbi_sock *csk) |
243 | { |
244 | struct sk_buff *skb = csk->cpl_close; |
245 | struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; |
246 | unsigned int tid = csk->tid; |
247 | |
248 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
249 | "csk 0x%p,%u,0x%lx, tid %u.\n", |
250 | csk, csk->state, csk->flags, csk->tid); |
251 | csk->cpl_close = NULL; |
252 | set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); |
253 | INIT_TP_WR(req, tid); |
254 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); |
255 | req->rsvd = 0; |
256 | |
257 | cxgbi_sock_skb_entail(csk, skb); |
258 | if (csk->state >= CTP_ESTABLISHED) |
259 | push_tx_frames(csk, 1); |
260 | } |
261 | |
262 | static void abort_arp_failure(void *handle, struct sk_buff *skb) |
263 | { |
264 | struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; |
265 | struct cpl_abort_req *req; |
266 | |
267 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
268 | "csk 0x%p,%u,0x%lx, tid %u, abort.\n", |
269 | csk, csk->state, csk->flags, csk->tid); |
270 | req = (struct cpl_abort_req *)skb->data; |
271 | req->cmd = CPL_ABORT_NO_RST; |
272 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); |
273 | } |
274 | |
275 | static void send_abort_req(struct cxgbi_sock *csk) |
276 | { |
277 | struct cpl_abort_req *req; |
278 | struct sk_buff *skb = csk->cpl_abort_req; |
279 | |
280 | if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) |
281 | return; |
282 | cxgbi_sock_set_state(csk, CTP_ABORTING); |
283 | cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); |
284 | cxgbi_sock_purge_write_queue(csk); |
285 | |
286 | csk->cpl_abort_req = NULL; |
287 | req = (struct cpl_abort_req *)skb->head; |
288 | set_queue(skb, CPL_PRIORITY_DATA, csk); |
289 | req->cmd = CPL_ABORT_SEND_RST; |
290 | t4_set_arp_err_handler(skb, csk, abort_arp_failure); |
291 | INIT_TP_WR(req, csk->tid); |
292 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); |
293 | req->rsvd0 = htonl(csk->snd_nxt); |
294 | req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); |
295 | |
296 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
297 | "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", |
298 | csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, |
299 | req->rsvd1); |
300 | |
301 | cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); |
302 | } |
303 | |
304 | static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) |
305 | { |
306 | struct sk_buff *skb = csk->cpl_abort_rpl; |
307 | struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; |
308 | |
309 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
310 | "csk 0x%p,%u,0x%lx,%u, status %d.\n", |
311 | csk, csk->state, csk->flags, csk->tid, rst_status); |
312 | |
313 | csk->cpl_abort_rpl = NULL; |
314 | set_queue(skb, CPL_PRIORITY_DATA, csk); |
315 | INIT_TP_WR(rpl, csk->tid); |
316 | OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); |
317 | rpl->cmd = rst_status; |
318 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); |
319 | } |
320 | |
321 | /* |
322 | * CPL connection rx data ack: host -> |
323 | * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of |
324 | * credits sent. |
325 | */ |
326 | static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) |
327 | { |
328 | struct sk_buff *skb; |
329 | struct cpl_rx_data_ack *req; |
330 | |
331 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
332 | "csk 0x%p,%u,0x%lx,%u, credit %u.\n", |
333 | csk, csk->state, csk->flags, csk->tid, credits); |
334 | |
24d3f95a |
335 | skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); |
7b36b6e0 |
336 | if (!skb) { |
337 | pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); |
338 | return 0; |
339 | } |
340 | req = (struct cpl_rx_data_ack *)skb->head; |
341 | |
342 | set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); |
343 | INIT_TP_WR(req, csk->tid); |
344 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, |
345 | csk->tid)); |
346 | req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1)); |
347 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); |
348 | return credits; |
349 | } |
350 | |
351 | /* |
352 | * sgl_len - calculates the size of an SGL of the given capacity |
353 | * @n: the number of SGL entries |
354 | * Calculates the number of flits needed for a scatter/gather list that |
355 | * can hold the given number of entries. |
356 | */ |
357 | static inline unsigned int sgl_len(unsigned int n) |
358 | { |
359 | n--; |
360 | return (3 * n) / 2 + (n & 1) + 2; |
361 | } |
362 | |
363 | /* |
364 | * calc_tx_flits_ofld - calculate # of flits for an offload packet |
365 | * @skb: the packet |
366 | * |
367 | * Returns the number of flits needed for the given offload packet. |
368 | * These packets are already fully constructed and no additional headers |
369 | * will be added. |
370 | */ |
371 | static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) |
372 | { |
373 | unsigned int flits, cnt; |
374 | |
375 | if (is_ofld_imm(skb)) |
376 | return DIV_ROUND_UP(skb->len, 8); |
377 | flits = skb_transport_offset(skb) / 8; |
378 | cnt = skb_shinfo(skb)->nr_frags; |
379 | if (skb->tail != skb->transport_header) |
380 | cnt++; |
381 | return flits + sgl_len(cnt); |
382 | } |
383 | |
384 | static inline void send_tx_flowc_wr(struct cxgbi_sock *csk) |
385 | { |
386 | struct sk_buff *skb; |
387 | struct fw_flowc_wr *flowc; |
388 | int flowclen, i; |
389 | |
390 | flowclen = 80; |
24d3f95a |
391 | skb = alloc_wr(flowclen, 0, GFP_ATOMIC); |
7b36b6e0 |
392 | flowc = (struct fw_flowc_wr *)skb->head; |
393 | flowc->op_to_nparams = |
394 | htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8)); |
395 | flowc->flowid_len16 = |
396 | htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) | |
397 | FW_WR_FLOWID(csk->tid)); |
398 | flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; |
399 | flowc->mnemval[0].val = htonl(0); |
400 | flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; |
401 | flowc->mnemval[1].val = htonl(csk->tx_chan); |
402 | flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; |
403 | flowc->mnemval[2].val = htonl(csk->tx_chan); |
404 | flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; |
405 | flowc->mnemval[3].val = htonl(csk->rss_qid); |
406 | flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; |
407 | flowc->mnemval[4].val = htonl(csk->snd_nxt); |
408 | flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; |
409 | flowc->mnemval[5].val = htonl(csk->rcv_nxt); |
410 | flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; |
411 | flowc->mnemval[6].val = htonl(cxgb4i_snd_win); |
412 | flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; |
413 | flowc->mnemval[7].val = htonl(csk->advmss); |
414 | flowc->mnemval[8].mnemonic = 0; |
415 | flowc->mnemval[8].val = 0; |
416 | for (i = 0; i < 9; i++) { |
417 | flowc->mnemval[i].r4[0] = 0; |
418 | flowc->mnemval[i].r4[1] = 0; |
419 | flowc->mnemval[i].r4[2] = 0; |
420 | } |
421 | set_queue(skb, CPL_PRIORITY_DATA, csk); |
422 | |
423 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
424 | "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", |
425 | csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, |
426 | csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win, |
427 | csk->advmss); |
428 | |
429 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); |
430 | } |
431 | |
432 | static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, |
433 | int dlen, int len, u32 credits, int compl) |
434 | { |
435 | struct fw_ofld_tx_data_wr *req; |
436 | unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; |
437 | unsigned int wr_ulp_mode = 0; |
438 | |
439 | req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); |
440 | |
441 | if (is_ofld_imm(skb)) { |
442 | req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) | |
443 | FW_WR_COMPL(1) | |
444 | FW_WR_IMMDLEN(dlen)); |
445 | req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) | |
446 | FW_WR_LEN16(credits)); |
447 | } else { |
448 | req->op_to_immdlen = |
449 | cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) | |
450 | FW_WR_COMPL(1) | |
451 | FW_WR_IMMDLEN(0)); |
452 | req->flowid_len16 = |
453 | cpu_to_be32(FW_WR_FLOWID(csk->tid) | |
454 | FW_WR_LEN16(credits)); |
455 | } |
456 | if (submode) |
457 | wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) | |
458 | FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode); |
459 | req->tunnel_to_proxy = htonl(wr_ulp_mode) | |
460 | FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1); |
461 | req->plen = htonl(len); |
462 | if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) |
463 | cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); |
464 | } |
465 | |
466 | static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) |
467 | { |
468 | kfree_skb(skb); |
469 | } |
470 | |
471 | static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) |
472 | { |
473 | int total_size = 0; |
474 | struct sk_buff *skb; |
475 | |
476 | if (unlikely(csk->state < CTP_ESTABLISHED || |
477 | csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { |
478 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | |
479 | 1 << CXGBI_DBG_PDU_TX, |
480 | "csk 0x%p,%u,0x%lx,%u, in closing state.\n", |
481 | csk, csk->state, csk->flags, csk->tid); |
482 | return 0; |
483 | } |
484 | |
485 | while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { |
486 | int dlen = skb->len; |
487 | int len = skb->len; |
488 | unsigned int credits_needed; |
489 | |
490 | skb_reset_transport_header(skb); |
491 | if (is_ofld_imm(skb)) |
492 | credits_needed = DIV_ROUND_UP(dlen + |
493 | sizeof(struct fw_ofld_tx_data_wr), 16); |
494 | else |
495 | credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb) |
496 | + sizeof(struct fw_ofld_tx_data_wr), |
497 | 16); |
498 | |
499 | if (csk->wr_cred < credits_needed) { |
500 | log_debug(1 << CXGBI_DBG_PDU_TX, |
501 | "csk 0x%p, skb %u/%u, wr %d < %u.\n", |
502 | csk, skb->len, skb->data_len, |
503 | credits_needed, csk->wr_cred); |
504 | break; |
505 | } |
506 | __skb_unlink(skb, &csk->write_queue); |
507 | set_queue(skb, CPL_PRIORITY_DATA, csk); |
508 | skb->csum = credits_needed; |
509 | csk->wr_cred -= credits_needed; |
510 | csk->wr_una_cred += credits_needed; |
511 | cxgbi_sock_enqueue_wr(csk, skb); |
512 | |
513 | log_debug(1 << CXGBI_DBG_PDU_TX, |
514 | "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", |
515 | csk, skb->len, skb->data_len, credits_needed, |
516 | csk->wr_cred, csk->wr_una_cred); |
517 | |
518 | if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { |
519 | if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { |
520 | send_tx_flowc_wr(csk); |
521 | skb->csum += 5; |
522 | csk->wr_cred -= 5; |
523 | csk->wr_una_cred += 5; |
524 | } |
525 | len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); |
526 | make_tx_data_wr(csk, skb, dlen, len, credits_needed, |
527 | req_completion); |
528 | csk->snd_nxt += len; |
529 | cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); |
530 | } |
531 | total_size += skb->truesize; |
532 | t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); |
533 | |
534 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, |
535 | "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", |
536 | csk, csk->state, csk->flags, csk->tid, skb, len); |
537 | |
538 | cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); |
539 | } |
540 | return total_size; |
541 | } |
542 | |
543 | static inline void free_atid(struct cxgbi_sock *csk) |
544 | { |
545 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); |
546 | |
547 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { |
548 | cxgb4_free_atid(lldi->tids, csk->atid); |
549 | cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); |
550 | cxgbi_sock_put(csk); |
551 | } |
552 | } |
553 | |
554 | static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) |
555 | { |
556 | struct cxgbi_sock *csk; |
557 | struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; |
558 | unsigned short tcp_opt = ntohs(req->tcp_opt); |
559 | unsigned int tid = GET_TID(req); |
560 | unsigned int atid = GET_TID_TID(ntohl(req->tos_atid)); |
561 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
562 | struct tid_info *t = lldi->tids; |
563 | u32 rcv_isn = be32_to_cpu(req->rcv_isn); |
564 | |
565 | csk = lookup_atid(t, atid); |
566 | if (unlikely(!csk)) { |
567 | pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); |
568 | goto rel_skb; |
569 | } |
570 | |
571 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
572 | "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n", |
573 | csk, csk->state, csk->flags, tid, atid, rcv_isn); |
574 | |
575 | cxgbi_sock_get(csk); |
576 | csk->tid = tid; |
577 | cxgb4_insert_tid(lldi->tids, csk, tid); |
578 | cxgbi_sock_set_flag(csk, CTPF_HAS_TID); |
579 | |
580 | free_atid(csk); |
581 | |
582 | spin_lock_bh(&csk->lock); |
583 | if (unlikely(csk->state != CTP_ACTIVE_OPEN)) |
584 | pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", |
585 | csk, csk->state, csk->flags, csk->tid); |
586 | |
587 | if (csk->retry_timer.function) { |
588 | del_timer(&csk->retry_timer); |
589 | csk->retry_timer.function = NULL; |
590 | } |
591 | |
592 | csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; |
593 | /* |
594 | * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't |
595 | * pass through opt0. |
596 | */ |
597 | if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10)) |
598 | csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10); |
599 | |
600 | csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40; |
601 | if (GET_TCPOPT_TSTAMP(tcp_opt)) |
602 | csk->advmss -= 12; |
603 | if (csk->advmss < 128) |
604 | csk->advmss = 128; |
605 | |
606 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
607 | "csk 0x%p, mss_idx %u, advmss %u.\n", |
608 | csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss); |
609 | |
610 | cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); |
611 | |
612 | if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) |
613 | send_abort_req(csk); |
614 | else { |
615 | if (skb_queue_len(&csk->write_queue)) |
616 | push_tx_frames(csk, 0); |
617 | cxgbi_conn_tx_open(csk); |
618 | } |
619 | spin_unlock_bh(&csk->lock); |
620 | |
621 | rel_skb: |
622 | __kfree_skb(skb); |
623 | } |
624 | |
625 | static int act_open_rpl_status_to_errno(int status) |
626 | { |
627 | switch (status) { |
628 | case CPL_ERR_CONN_RESET: |
629 | return -ECONNREFUSED; |
630 | case CPL_ERR_ARP_MISS: |
631 | return -EHOSTUNREACH; |
632 | case CPL_ERR_CONN_TIMEDOUT: |
633 | return -ETIMEDOUT; |
634 | case CPL_ERR_TCAM_FULL: |
635 | return -ENOMEM; |
636 | case CPL_ERR_CONN_EXIST: |
637 | return -EADDRINUSE; |
638 | default: |
639 | return -EIO; |
640 | } |
641 | } |
642 | |
643 | static void csk_act_open_retry_timer(unsigned long data) |
644 | { |
645 | struct sk_buff *skb; |
646 | struct cxgbi_sock *csk = (struct cxgbi_sock *)data; |
647 | |
648 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
649 | "csk 0x%p,%u,0x%lx,%u.\n", |
650 | csk, csk->state, csk->flags, csk->tid); |
651 | |
652 | cxgbi_sock_get(csk); |
653 | spin_lock_bh(&csk->lock); |
24d3f95a |
654 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); |
7b36b6e0 |
655 | if (!skb) |
656 | cxgbi_sock_fail_act_open(csk, -ENOMEM); |
657 | else { |
658 | skb->sk = (struct sock *)csk; |
659 | t4_set_arp_err_handler(skb, csk, |
660 | cxgbi_sock_act_open_req_arp_failure); |
661 | send_act_open_req(csk, skb, csk->l2t); |
662 | } |
663 | spin_unlock_bh(&csk->lock); |
664 | cxgbi_sock_put(csk); |
665 | } |
666 | |
667 | static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) |
668 | { |
669 | struct cxgbi_sock *csk; |
670 | struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; |
671 | unsigned int tid = GET_TID(rpl); |
672 | unsigned int atid = |
673 | GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status))); |
674 | unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status)); |
675 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
676 | struct tid_info *t = lldi->tids; |
677 | |
678 | csk = lookup_atid(t, atid); |
679 | if (unlikely(!csk)) { |
680 | pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); |
681 | goto rel_skb; |
682 | } |
683 | |
684 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
685 | "csk 0x%p,%u,0x%lx, status %u, atid %u, tid %u.\n", |
686 | csk, csk->state, csk->flags, status, atid, tid); |
687 | |
688 | if (status && status != CPL_ERR_TCAM_FULL && |
689 | status != CPL_ERR_CONN_EXIST && |
690 | status != CPL_ERR_ARP_MISS) |
691 | cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); |
692 | |
693 | cxgbi_sock_get(csk); |
694 | spin_lock_bh(&csk->lock); |
695 | |
696 | if (status == CPL_ERR_CONN_EXIST && |
697 | csk->retry_timer.function != csk_act_open_retry_timer) { |
698 | csk->retry_timer.function = csk_act_open_retry_timer; |
699 | mod_timer(&csk->retry_timer, jiffies + HZ / 2); |
700 | } else |
701 | cxgbi_sock_fail_act_open(csk, |
702 | act_open_rpl_status_to_errno(status)); |
703 | |
704 | spin_unlock_bh(&csk->lock); |
705 | cxgbi_sock_put(csk); |
706 | rel_skb: |
707 | __kfree_skb(skb); |
708 | } |
709 | |
710 | static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) |
711 | { |
712 | struct cxgbi_sock *csk; |
713 | struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; |
714 | unsigned int tid = GET_TID(req); |
715 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
716 | struct tid_info *t = lldi->tids; |
717 | |
718 | csk = lookup_tid(t, tid); |
719 | if (unlikely(!csk)) { |
720 | pr_err("can't find connection for tid %u.\n", tid); |
721 | goto rel_skb; |
722 | } |
723 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
724 | "csk 0x%p,%u,0x%lx,%u.\n", |
725 | csk, csk->state, csk->flags, csk->tid); |
726 | cxgbi_sock_rcv_peer_close(csk); |
727 | rel_skb: |
728 | __kfree_skb(skb); |
729 | } |
730 | |
731 | static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) |
732 | { |
733 | struct cxgbi_sock *csk; |
734 | struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; |
735 | unsigned int tid = GET_TID(rpl); |
736 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
737 | struct tid_info *t = lldi->tids; |
738 | |
739 | csk = lookup_tid(t, tid); |
740 | if (unlikely(!csk)) { |
741 | pr_err("can't find connection for tid %u.\n", tid); |
742 | goto rel_skb; |
743 | } |
744 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
745 | "csk 0x%p,%u,0x%lx,%u.\n", |
746 | csk, csk->state, csk->flags, csk->tid); |
747 | cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); |
748 | rel_skb: |
749 | __kfree_skb(skb); |
750 | } |
751 | |
752 | static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, |
753 | int *need_rst) |
754 | { |
755 | switch (abort_reason) { |
756 | case CPL_ERR_BAD_SYN: /* fall through */ |
757 | case CPL_ERR_CONN_RESET: |
758 | return csk->state > CTP_ESTABLISHED ? |
759 | -EPIPE : -ECONNRESET; |
760 | case CPL_ERR_XMIT_TIMEDOUT: |
761 | case CPL_ERR_PERSIST_TIMEDOUT: |
762 | case CPL_ERR_FINWAIT2_TIMEDOUT: |
763 | case CPL_ERR_KEEPALIVE_TIMEDOUT: |
764 | return -ETIMEDOUT; |
765 | default: |
766 | return -EIO; |
767 | } |
768 | } |
769 | |
770 | static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) |
771 | { |
772 | struct cxgbi_sock *csk; |
773 | struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; |
774 | unsigned int tid = GET_TID(req); |
775 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
776 | struct tid_info *t = lldi->tids; |
777 | int rst_status = CPL_ABORT_NO_RST; |
778 | |
779 | csk = lookup_tid(t, tid); |
780 | if (unlikely(!csk)) { |
781 | pr_err("can't find connection for tid %u.\n", tid); |
782 | goto rel_skb; |
783 | } |
784 | |
785 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
786 | "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n", |
787 | csk, csk->state, csk->flags, csk->tid, req->status); |
788 | |
789 | if (req->status == CPL_ERR_RTX_NEG_ADVICE || |
790 | req->status == CPL_ERR_PERSIST_NEG_ADVICE) |
791 | goto rel_skb; |
792 | |
793 | cxgbi_sock_get(csk); |
794 | spin_lock_bh(&csk->lock); |
795 | |
796 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { |
797 | cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); |
798 | cxgbi_sock_set_state(csk, CTP_ABORTING); |
799 | goto done; |
800 | } |
801 | |
802 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); |
803 | send_abort_rpl(csk, rst_status); |
804 | |
805 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { |
806 | csk->err = abort_status_to_errno(csk, req->status, &rst_status); |
807 | cxgbi_sock_closed(csk); |
808 | } |
809 | done: |
810 | spin_unlock_bh(&csk->lock); |
811 | cxgbi_sock_put(csk); |
812 | rel_skb: |
813 | __kfree_skb(skb); |
814 | } |
815 | |
816 | static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) |
817 | { |
818 | struct cxgbi_sock *csk; |
819 | struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; |
820 | unsigned int tid = GET_TID(rpl); |
821 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
822 | struct tid_info *t = lldi->tids; |
823 | |
824 | csk = lookup_tid(t, tid); |
825 | if (!csk) |
826 | goto rel_skb; |
827 | |
828 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
829 | "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", |
830 | rpl->status, csk, csk ? csk->state : 0, |
831 | csk ? csk->flags : 0UL); |
832 | |
833 | if (rpl->status == CPL_ERR_ABORT_FAILED) |
834 | goto rel_skb; |
835 | |
836 | cxgbi_sock_rcv_abort_rpl(csk); |
837 | rel_skb: |
838 | __kfree_skb(skb); |
839 | } |
840 | |
841 | static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) |
842 | { |
843 | struct cxgbi_sock *csk; |
844 | struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; |
845 | unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); |
846 | unsigned int tid = GET_TID(cpl); |
847 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
848 | struct tid_info *t = lldi->tids; |
849 | struct sk_buff *lskb; |
850 | |
851 | csk = lookup_tid(t, tid); |
852 | if (unlikely(!csk)) { |
853 | pr_err("can't find conn. for tid %u.\n", tid); |
854 | goto rel_skb; |
855 | } |
856 | |
857 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
858 | "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", |
859 | csk, csk->state, csk->flags, csk->tid, skb, skb->len, |
860 | pdu_len_ddp); |
861 | |
862 | spin_lock_bh(&csk->lock); |
863 | |
864 | if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { |
865 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
866 | "csk 0x%p,%u,0x%lx,%u, bad state.\n", |
867 | csk, csk->state, csk->flags, csk->tid); |
868 | if (csk->state != CTP_ABORTING) |
869 | goto abort_conn; |
870 | else |
871 | goto discard; |
872 | } |
873 | |
874 | cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); |
875 | skb_reset_transport_header(skb); |
876 | __skb_pull(skb, sizeof(*cpl)); |
877 | __pskb_trim(skb, ntohs(cpl->len)); |
878 | |
879 | if (!csk->skb_ulp_lhdr) { |
880 | unsigned char *bhs; |
881 | unsigned int hlen, dlen; |
882 | |
883 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
884 | "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", |
885 | csk, csk->state, csk->flags, csk->tid, skb); |
886 | csk->skb_ulp_lhdr = skb; |
887 | lskb = csk->skb_ulp_lhdr; |
888 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_HDR); |
889 | |
890 | if (cxgbi_skcb_tcp_seq(lskb) != csk->rcv_nxt) { |
891 | pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", |
892 | csk->tid, cxgbi_skcb_tcp_seq(lskb), |
893 | csk->rcv_nxt); |
894 | goto abort_conn; |
895 | } |
896 | |
897 | bhs = lskb->data; |
898 | hlen = ntohs(cpl->len); |
899 | dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; |
900 | |
901 | if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) { |
902 | pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " |
903 | "mismatch %u != %u + %u, seq 0x%x.\n", |
904 | csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40, |
905 | hlen, dlen, cxgbi_skcb_tcp_seq(skb)); |
906 | goto abort_conn; |
907 | } |
908 | |
909 | cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); |
910 | if (dlen) |
911 | cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; |
912 | csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); |
913 | |
914 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
915 | "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", |
916 | csk, skb, *bhs, hlen, dlen, |
917 | ntohl(*((unsigned int *)(bhs + 16))), |
918 | ntohl(*((unsigned int *)(bhs + 24)))); |
919 | |
920 | } else { |
921 | lskb = csk->skb_ulp_lhdr; |
922 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); |
923 | |
924 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
925 | "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", |
926 | csk, csk->state, csk->flags, skb, lskb); |
927 | } |
928 | |
929 | __skb_queue_tail(&csk->receive_queue, skb); |
930 | spin_unlock_bh(&csk->lock); |
931 | return; |
932 | |
933 | abort_conn: |
934 | send_abort_req(csk); |
935 | discard: |
936 | spin_unlock_bh(&csk->lock); |
937 | rel_skb: |
938 | __kfree_skb(skb); |
939 | } |
940 | |
941 | static void do_rx_data_ddp(struct cxgbi_device *cdev, |
942 | struct sk_buff *skb) |
943 | { |
944 | struct cxgbi_sock *csk; |
945 | struct sk_buff *lskb; |
946 | struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; |
947 | unsigned int tid = GET_TID(rpl); |
948 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
949 | struct tid_info *t = lldi->tids; |
950 | unsigned int status = ntohl(rpl->ddpvld); |
951 | |
952 | csk = lookup_tid(t, tid); |
953 | if (unlikely(!csk)) { |
954 | pr_err("can't find connection for tid %u.\n", tid); |
955 | goto rel_skb; |
956 | } |
957 | |
958 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
959 | "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", |
960 | csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); |
961 | |
962 | spin_lock_bh(&csk->lock); |
963 | |
964 | if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { |
965 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
966 | "csk 0x%p,%u,0x%lx,%u, bad state.\n", |
967 | csk, csk->state, csk->flags, csk->tid); |
968 | if (csk->state != CTP_ABORTING) |
969 | goto abort_conn; |
970 | else |
971 | goto discard; |
972 | } |
973 | |
974 | if (!csk->skb_ulp_lhdr) { |
975 | pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); |
976 | goto abort_conn; |
977 | } |
978 | |
979 | lskb = csk->skb_ulp_lhdr; |
980 | csk->skb_ulp_lhdr = NULL; |
981 | |
982 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); |
983 | cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); |
984 | |
985 | if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) |
986 | pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", |
987 | csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); |
988 | |
989 | if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { |
990 | log_debug(1 << CXGBI_DBG_PDU_RX, |
991 | "csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad.\n", |
992 | csk, lskb, status); |
993 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); |
994 | } |
995 | if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { |
996 | log_debug(1 << CXGBI_DBG_PDU_RX, |
997 | "csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad.\n", |
998 | csk, lskb, status); |
999 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); |
1000 | } |
1001 | if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { |
1002 | log_debug(1 << CXGBI_DBG_PDU_RX, |
1003 | "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", |
1004 | csk, lskb, status); |
1005 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); |
1006 | } |
1007 | if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && |
1008 | !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { |
1009 | log_debug(1 << CXGBI_DBG_PDU_RX, |
1010 | "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", |
1011 | csk, lskb, status); |
1012 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); |
1013 | } |
1014 | log_debug(1 << CXGBI_DBG_PDU_RX, |
1015 | "csk 0x%p, lskb 0x%p, f 0x%lx.\n", |
1016 | csk, lskb, cxgbi_skcb_flags(lskb)); |
1017 | |
1018 | cxgbi_conn_pdu_ready(csk); |
1019 | spin_unlock_bh(&csk->lock); |
1020 | goto rel_skb; |
1021 | |
1022 | abort_conn: |
1023 | send_abort_req(csk); |
1024 | discard: |
1025 | spin_unlock_bh(&csk->lock); |
1026 | rel_skb: |
1027 | __kfree_skb(skb); |
1028 | } |
1029 | |
1030 | static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) |
1031 | { |
1032 | struct cxgbi_sock *csk; |
1033 | struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; |
1034 | unsigned int tid = GET_TID(rpl); |
1035 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
1036 | struct tid_info *t = lldi->tids; |
1037 | |
1038 | csk = lookup_tid(t, tid); |
1039 | if (unlikely(!csk)) |
1040 | pr_err("can't find connection for tid %u.\n", tid); |
1041 | else { |
1042 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
1043 | "csk 0x%p,%u,0x%lx,%u.\n", |
1044 | csk, csk->state, csk->flags, csk->tid); |
1045 | cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), |
1046 | rpl->seq_vld); |
1047 | } |
1048 | __kfree_skb(skb); |
1049 | } |
1050 | |
1051 | static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) |
1052 | { |
1053 | struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; |
1054 | unsigned int tid = GET_TID(rpl); |
1055 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
1056 | struct tid_info *t = lldi->tids; |
1057 | struct cxgbi_sock *csk; |
1058 | |
1059 | csk = lookup_tid(t, tid); |
1060 | if (!csk) |
1061 | pr_err("can't find conn. for tid %u.\n", tid); |
1062 | |
1063 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
1064 | "csk 0x%p,%u,%lx,%u, status 0x%x.\n", |
1065 | csk, csk->state, csk->flags, csk->tid, rpl->status); |
1066 | |
1067 | if (rpl->status != CPL_ERR_NONE) |
1068 | pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", |
1069 | csk, tid, rpl->status); |
1070 | |
1071 | __kfree_skb(skb); |
1072 | } |
1073 | |
1074 | static int alloc_cpls(struct cxgbi_sock *csk) |
1075 | { |
24d3f95a |
1076 | csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), |
1077 | 0, GFP_KERNEL); |
7b36b6e0 |
1078 | if (!csk->cpl_close) |
1079 | return -ENOMEM; |
1080 | |
24d3f95a |
1081 | csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), |
1082 | 0, GFP_KERNEL); |
7b36b6e0 |
1083 | if (!csk->cpl_abort_req) |
1084 | goto free_cpls; |
1085 | |
24d3f95a |
1086 | csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), |
1087 | 0, GFP_KERNEL); |
7b36b6e0 |
1088 | if (!csk->cpl_abort_rpl) |
1089 | goto free_cpls; |
1090 | return 0; |
1091 | |
1092 | free_cpls: |
1093 | cxgbi_sock_free_cpl_skbs(csk); |
1094 | return -ENOMEM; |
1095 | } |
1096 | |
1097 | static inline void l2t_put(struct cxgbi_sock *csk) |
1098 | { |
1099 | if (csk->l2t) { |
1100 | cxgb4_l2t_release(csk->l2t); |
1101 | csk->l2t = NULL; |
1102 | cxgbi_sock_put(csk); |
1103 | } |
1104 | } |
1105 | |
1106 | static void release_offload_resources(struct cxgbi_sock *csk) |
1107 | { |
1108 | struct cxgb4_lld_info *lldi; |
1109 | |
1110 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
1111 | "csk 0x%p,%u,0x%lx,%u.\n", |
1112 | csk, csk->state, csk->flags, csk->tid); |
1113 | |
1114 | cxgbi_sock_free_cpl_skbs(csk); |
1115 | if (csk->wr_cred != csk->wr_max_cred) { |
1116 | cxgbi_sock_purge_wr_queue(csk); |
1117 | cxgbi_sock_reset_wr_list(csk); |
1118 | } |
1119 | |
1120 | l2t_put(csk); |
1121 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) |
1122 | free_atid(csk); |
1123 | else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { |
1124 | lldi = cxgbi_cdev_priv(csk->cdev); |
1125 | cxgb4_remove_tid(lldi->tids, 0, csk->tid); |
1126 | cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); |
1127 | cxgbi_sock_put(csk); |
1128 | } |
1129 | csk->dst = NULL; |
1130 | csk->cdev = NULL; |
1131 | } |
1132 | |
1133 | static int init_act_open(struct cxgbi_sock *csk) |
1134 | { |
1135 | struct cxgbi_device *cdev = csk->cdev; |
1136 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
1137 | struct net_device *ndev = cdev->ports[csk->port_id]; |
1138 | struct port_info *pi = netdev_priv(ndev); |
1139 | struct sk_buff *skb = NULL; |
1140 | unsigned int step; |
1141 | |
1142 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
1143 | "csk 0x%p,%u,0x%lx,%u.\n", |
1144 | csk, csk->state, csk->flags, csk->tid); |
1145 | |
1146 | csk->atid = cxgb4_alloc_atid(lldi->tids, csk); |
1147 | if (csk->atid < 0) { |
1148 | pr_err("%s, NO atid available.\n", ndev->name); |
1149 | return -EINVAL; |
1150 | } |
1151 | cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); |
1152 | cxgbi_sock_get(csk); |
1153 | |
1154 | csk->l2t = cxgb4_l2t_get(lldi->l2t, csk->dst->neighbour, ndev, 0); |
1155 | if (!csk->l2t) { |
1156 | pr_err("%s, cannot alloc l2t.\n", ndev->name); |
1157 | goto rel_resource; |
1158 | } |
1159 | cxgbi_sock_get(csk); |
1160 | |
24d3f95a |
1161 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); |
7b36b6e0 |
1162 | if (!skb) |
1163 | goto rel_resource; |
1164 | skb->sk = (struct sock *)csk; |
1165 | t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); |
1166 | |
1167 | if (!csk->mtu) |
1168 | csk->mtu = dst_mtu(csk->dst); |
1169 | cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); |
1170 | csk->tx_chan = cxgb4_port_chan(ndev); |
1171 | /* SMT two entries per row */ |
1172 | csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; |
1173 | step = lldi->ntxq / lldi->nchan; |
1174 | csk->txq_idx = cxgb4_port_idx(ndev) * step; |
1175 | step = lldi->nrxq / lldi->nchan; |
1176 | csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; |
1177 | csk->wr_max_cred = csk->wr_cred = lldi->wr_cred; |
1178 | csk->wr_una_cred = 0; |
1179 | cxgbi_sock_reset_wr_list(csk); |
1180 | csk->err = 0; |
1181 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
1182 | "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n", |
1183 | csk, pi->port_id, ndev->name, csk->tx_chan, |
1184 | csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx, |
1185 | csk->smac_idx); |
1186 | |
1187 | cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); |
1188 | send_act_open_req(csk, skb, csk->l2t); |
1189 | return 0; |
1190 | |
1191 | rel_resource: |
1192 | if (skb) |
1193 | __kfree_skb(skb); |
1194 | return -EINVAL; |
1195 | } |
1196 | |
1197 | cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { |
1198 | [CPL_ACT_ESTABLISH] = do_act_establish, |
1199 | [CPL_ACT_OPEN_RPL] = do_act_open_rpl, |
1200 | [CPL_PEER_CLOSE] = do_peer_close, |
1201 | [CPL_ABORT_REQ_RSS] = do_abort_req_rss, |
1202 | [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, |
1203 | [CPL_CLOSE_CON_RPL] = do_close_con_rpl, |
1204 | [CPL_FW4_ACK] = do_fw4_ack, |
1205 | [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, |
1206 | [CPL_SET_TCB_RPL] = do_set_tcb_rpl, |
1207 | [CPL_RX_DATA_DDP] = do_rx_data_ddp, |
1208 | }; |
1209 | |
1210 | int cxgb4i_ofld_init(struct cxgbi_device *cdev) |
1211 | { |
1212 | int rc; |
1213 | |
1214 | if (cxgb4i_max_connect > CXGB4I_MAX_CONN) |
1215 | cxgb4i_max_connect = CXGB4I_MAX_CONN; |
1216 | |
1217 | rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, |
1218 | cxgb4i_max_connect); |
1219 | if (rc < 0) |
1220 | return rc; |
1221 | |
1222 | cdev->csk_release_offload_resources = release_offload_resources; |
1223 | cdev->csk_push_tx_frames = push_tx_frames; |
1224 | cdev->csk_send_abort_req = send_abort_req; |
1225 | cdev->csk_send_close_req = send_close_req; |
1226 | cdev->csk_send_rx_credits = send_rx_credits; |
1227 | cdev->csk_alloc_cpls = alloc_cpls; |
1228 | cdev->csk_init_act_open = init_act_open; |
1229 | |
1230 | pr_info("cdev 0x%p, offload up, added.\n", cdev); |
1231 | return 0; |
1232 | } |
1233 | |
1234 | /* |
1235 | * functions to program the pagepod in h/w |
1236 | */ |
1237 | static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req, |
1238 | unsigned int dlen, unsigned int pm_addr) |
1239 | { |
1240 | struct ulptx_sgl *sgl; |
1241 | unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + |
1242 | sizeof(struct ulptx_sgl), 16); |
1243 | |
1244 | INIT_ULPTX_WR(req, wr_len, 0, 0); |
1245 | req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE)); |
1246 | req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5)); |
1247 | req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5)); |
1248 | req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); |
1249 | sgl = (struct ulptx_sgl *)(req + 1); |
1250 | sgl->cmd_nsge = htonl(ULPTX_CMD(ULP_TX_SC_DSGL) | ULPTX_NSGE(1)); |
1251 | sgl->len0 = htonl(dlen); |
1252 | } |
1253 | |
1254 | static int ddp_ppod_write_sgl(struct cxgbi_device *cdev, unsigned int port_id, |
1255 | struct cxgbi_pagepod_hdr *hdr, unsigned int idx, |
1256 | unsigned int npods, |
1257 | struct cxgbi_gather_list *gl, |
1258 | unsigned int gl_pidx) |
1259 | { |
1260 | struct cxgbi_ddp_info *ddp = cdev->ddp; |
1261 | unsigned int dlen, pm_addr; |
1262 | struct sk_buff *skb; |
1263 | struct ulp_mem_io *req; |
1264 | struct ulptx_sgl *sgl; |
1265 | struct cxgbi_pagepod *ppod; |
1266 | unsigned int i; |
1267 | |
1268 | dlen = PPOD_SIZE * npods; |
1269 | pm_addr = idx * PPOD_SIZE + ddp->llimit; |
1270 | |
24d3f95a |
1271 | skb = alloc_wr(sizeof(*req) + sizeof(*sgl), dlen, GFP_ATOMIC); |
7b36b6e0 |
1272 | if (!skb) { |
1273 | pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", |
1274 | cdev, idx, npods); |
1275 | return -ENOMEM; |
1276 | } |
1277 | req = (struct ulp_mem_io *)skb->head; |
1278 | set_queue(skb, CPL_PRIORITY_CONTROL, NULL); |
1279 | |
1280 | ulp_mem_io_set_hdr(req, dlen, pm_addr); |
1281 | sgl = (struct ulptx_sgl *)(req + 1); |
1282 | ppod = (struct cxgbi_pagepod *)(sgl + 1); |
1283 | sgl->addr0 = cpu_to_be64(virt_to_phys(ppod)); |
1284 | |
1285 | for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { |
1286 | if (!hdr && !gl) |
1287 | cxgbi_ddp_ppod_clear(ppod); |
1288 | else |
1289 | cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); |
1290 | } |
1291 | |
1292 | cxgb4_ofld_send(cdev->ports[port_id], skb); |
1293 | return 0; |
1294 | } |
1295 | |
1296 | static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, |
1297 | unsigned int idx, unsigned int npods, |
1298 | struct cxgbi_gather_list *gl) |
1299 | { |
1300 | unsigned int i, cnt; |
1301 | int err = 0; |
1302 | |
1303 | for (i = 0; i < npods; i += cnt, idx += cnt) { |
1304 | cnt = npods - i; |
1305 | if (cnt > ULPMEM_DSGL_MAX_NPPODS) |
1306 | cnt = ULPMEM_DSGL_MAX_NPPODS; |
1307 | err = ddp_ppod_write_sgl(csk->cdev, csk->port_id, hdr, |
1308 | idx, cnt, gl, 4 * i); |
1309 | if (err < 0) |
1310 | break; |
1311 | } |
1312 | return err; |
1313 | } |
1314 | |
1315 | static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, |
1316 | unsigned int idx, unsigned int npods) |
1317 | { |
1318 | unsigned int i, cnt; |
1319 | int err; |
1320 | |
1321 | for (i = 0; i < npods; i += cnt, idx += cnt) { |
1322 | cnt = npods - i; |
1323 | if (cnt > ULPMEM_DSGL_MAX_NPPODS) |
1324 | cnt = ULPMEM_DSGL_MAX_NPPODS; |
1325 | err = ddp_ppod_write_sgl(chba->cdev, chba->port_id, NULL, |
1326 | idx, cnt, NULL, 0); |
1327 | if (err < 0) |
1328 | break; |
1329 | } |
1330 | } |
1331 | |
1332 | static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, |
1333 | int pg_idx, bool reply) |
1334 | { |
1335 | struct sk_buff *skb; |
1336 | struct cpl_set_tcb_field *req; |
1337 | u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; |
1338 | |
1339 | if (!pg_idx) |
1340 | return 0; |
1341 | |
24d3f95a |
1342 | skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); |
7b36b6e0 |
1343 | if (!skb) |
1344 | return -ENOMEM; |
1345 | |
1346 | /* set up ulp submode and page size */ |
1347 | val = (val & 0x03) << 2; |
1348 | val |= TCB_ULP_TYPE(ULP2_MODE_ISCSI); |
1349 | |
1350 | req = (struct cpl_set_tcb_field *)skb->head; |
1351 | INIT_TP_WR(req, csk->tid); |
1352 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); |
1353 | req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); |
1354 | req->word_cookie = htons(TCB_WORD(W_TCB_ULP_RAW)); |
1355 | req->mask = cpu_to_be64(TCB_ULP_TYPE(TCB_ULP_TYPE_MASK)); |
1356 | req->val = cpu_to_be64(val); |
1357 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); |
1358 | |
1359 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
1360 | "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); |
1361 | |
1362 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); |
1363 | return 0; |
1364 | } |
1365 | |
1366 | static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, |
1367 | int hcrc, int dcrc, int reply) |
1368 | { |
1369 | struct sk_buff *skb; |
1370 | struct cpl_set_tcb_field *req; |
1371 | u64 val = (hcrc ? ULP_CRC_HEADER : 0) | (dcrc ? ULP_CRC_DATA : 0); |
1372 | |
1373 | val = TCB_ULP_RAW(val); |
1374 | val |= TCB_ULP_TYPE(ULP2_MODE_ISCSI); |
1375 | |
24d3f95a |
1376 | skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); |
7b36b6e0 |
1377 | if (!skb) |
1378 | return -ENOMEM; |
1379 | |
1380 | csk->hcrc_len = (hcrc ? 4 : 0); |
1381 | csk->dcrc_len = (dcrc ? 4 : 0); |
1382 | /* set up ulp submode and page size */ |
1383 | req = (struct cpl_set_tcb_field *)skb->head; |
1384 | INIT_TP_WR(req, tid); |
1385 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); |
1386 | req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); |
1387 | req->word_cookie = htons(TCB_WORD(W_TCB_ULP_RAW)); |
1388 | req->mask = cpu_to_be64(TCB_ULP_RAW(TCB_ULP_RAW_MASK)); |
1389 | req->val = cpu_to_be64(val); |
1390 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); |
1391 | |
1392 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
1393 | "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); |
1394 | |
1395 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); |
1396 | return 0; |
1397 | } |
1398 | |
1399 | static int cxgb4i_ddp_init(struct cxgbi_device *cdev) |
1400 | { |
1401 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); |
1402 | struct cxgbi_ddp_info *ddp = cdev->ddp; |
1403 | unsigned int tagmask, pgsz_factor[4]; |
1404 | int err; |
1405 | |
1406 | if (ddp) { |
1407 | kref_get(&ddp->refcnt); |
1408 | pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", |
1409 | cdev, cdev->ddp); |
1410 | return -EALREADY; |
1411 | } |
1412 | |
1413 | err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, |
1414 | lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, |
1415 | lldi->iscsi_iolen, lldi->iscsi_iolen); |
1416 | if (err < 0) |
1417 | return err; |
1418 | |
1419 | ddp = cdev->ddp; |
1420 | |
1421 | tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; |
1422 | cxgbi_ddp_page_size_factor(pgsz_factor); |
1423 | cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); |
1424 | |
1425 | cdev->csk_ddp_free_gl_skb = NULL; |
1426 | cdev->csk_ddp_alloc_gl_skb = NULL; |
1427 | cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; |
1428 | cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; |
1429 | cdev->csk_ddp_set = ddp_set_map; |
1430 | cdev->csk_ddp_clear = ddp_clear_map; |
1431 | |
1432 | pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", |
1433 | cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, |
1434 | cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); |
1435 | pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " |
1436 | " %u/%u.\n", |
1437 | cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, |
1438 | ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, |
1439 | ddp->max_rxsz, lldi->iscsi_iolen); |
1440 | pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", |
1441 | cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, |
1442 | ddp->max_rxsz); |
1443 | return 0; |
1444 | } |
1445 | |
1446 | static void *t4_uld_add(const struct cxgb4_lld_info *lldi) |
1447 | { |
1448 | struct cxgbi_device *cdev; |
1449 | struct port_info *pi; |
1450 | int i, rc; |
1451 | |
1452 | cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); |
1453 | if (!cdev) { |
1454 | pr_info("t4 device 0x%p, register failed.\n", lldi); |
1455 | return NULL; |
1456 | } |
1457 | pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", |
1458 | cdev, lldi->adapter_type, lldi->nports, |
1459 | lldi->ports[0]->name, lldi->nchan, lldi->ntxq, |
1460 | lldi->nrxq, lldi->wr_cred); |
1461 | for (i = 0; i < lldi->nrxq; i++) |
1462 | log_debug(1 << CXGBI_DBG_DEV, |
1463 | "t4 0x%p, rxq id #%d: %u.\n", |
1464 | cdev, i, lldi->rxq_ids[i]); |
1465 | |
1466 | memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); |
1467 | cdev->flags = CXGBI_FLAG_DEV_T4; |
1468 | cdev->pdev = lldi->pdev; |
1469 | cdev->ports = lldi->ports; |
1470 | cdev->nports = lldi->nports; |
1471 | cdev->mtus = lldi->mtus; |
1472 | cdev->nmtus = NMTUS; |
1473 | cdev->snd_win = cxgb4i_snd_win; |
1474 | cdev->rcv_win = cxgb4i_rcv_win; |
1475 | cdev->rx_credit_thres = cxgb4i_rx_credit_thres; |
1476 | cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; |
1477 | cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); |
1478 | cdev->itp = &cxgb4i_iscsi_transport; |
1479 | |
1480 | rc = cxgb4i_ddp_init(cdev); |
1481 | if (rc) { |
1482 | pr_info("t4 0x%p ddp init failed.\n", cdev); |
1483 | goto err_out; |
1484 | } |
1485 | rc = cxgb4i_ofld_init(cdev); |
1486 | if (rc) { |
1487 | pr_info("t4 0x%p ofld init failed.\n", cdev); |
1488 | goto err_out; |
1489 | } |
1490 | |
1491 | rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, |
1492 | &cxgb4i_host_template, cxgb4i_stt); |
1493 | if (rc) |
1494 | goto err_out; |
1495 | |
1496 | for (i = 0; i < cdev->nports; i++) { |
1497 | pi = netdev_priv(lldi->ports[i]); |
1498 | cdev->hbas[i]->port_id = pi->port_id; |
1499 | } |
1500 | return cdev; |
1501 | |
1502 | err_out: |
1503 | cxgbi_device_unregister(cdev); |
1504 | return ERR_PTR(-ENOMEM); |
1505 | } |
1506 | |
1507 | #define RX_PULL_LEN 128 |
1508 | static int t4_uld_rx_handler(void *handle, const __be64 *rsp, |
1509 | const struct pkt_gl *pgl) |
1510 | { |
1511 | const struct cpl_act_establish *rpl; |
1512 | struct sk_buff *skb; |
1513 | unsigned int opc; |
1514 | struct cxgbi_device *cdev = handle; |
1515 | |
1516 | if (pgl == NULL) { |
1517 | unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; |
1518 | |
24d3f95a |
1519 | skb = alloc_wr(len, 0, GFP_ATOMIC); |
7b36b6e0 |
1520 | if (!skb) |
1521 | goto nomem; |
1522 | skb_copy_to_linear_data(skb, &rsp[1], len); |
1523 | } else { |
1524 | if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { |
1525 | pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", |
1526 | pgl->va, be64_to_cpu(*rsp), |
1527 | be64_to_cpu(*(u64 *)pgl->va), |
1528 | pgl->tot_len); |
1529 | return 0; |
1530 | } |
1531 | skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); |
1532 | if (unlikely(!skb)) |
1533 | goto nomem; |
1534 | } |
1535 | |
1536 | rpl = (struct cpl_act_establish *)skb->data; |
1537 | opc = rpl->ot.opcode; |
1538 | log_debug(1 << CXGBI_DBG_TOE, |
1539 | "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", |
1540 | cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); |
1541 | if (cxgb4i_cplhandlers[opc]) |
1542 | cxgb4i_cplhandlers[opc](cdev, skb); |
1543 | else { |
1544 | pr_err("No handler for opcode 0x%x.\n", opc); |
1545 | __kfree_skb(skb); |
1546 | } |
1547 | return 0; |
1548 | nomem: |
1549 | log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); |
1550 | return 1; |
1551 | } |
1552 | |
1553 | static int t4_uld_state_change(void *handle, enum cxgb4_state state) |
1554 | { |
1555 | struct cxgbi_device *cdev = handle; |
1556 | |
1557 | switch (state) { |
1558 | case CXGB4_STATE_UP: |
1559 | pr_info("cdev 0x%p, UP.\n", cdev); |
1560 | /* re-initialize */ |
1561 | break; |
1562 | case CXGB4_STATE_START_RECOVERY: |
1563 | pr_info("cdev 0x%p, RECOVERY.\n", cdev); |
1564 | /* close all connections */ |
1565 | break; |
1566 | case CXGB4_STATE_DOWN: |
1567 | pr_info("cdev 0x%p, DOWN.\n", cdev); |
1568 | break; |
1569 | case CXGB4_STATE_DETACH: |
1570 | pr_info("cdev 0x%p, DETACH.\n", cdev); |
1571 | break; |
1572 | default: |
1573 | pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); |
1574 | break; |
1575 | } |
1576 | return 0; |
1577 | } |
1578 | |
1579 | static int __init cxgb4i_init_module(void) |
1580 | { |
1581 | int rc; |
1582 | |
1583 | printk(KERN_INFO "%s", version); |
1584 | |
1585 | rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); |
1586 | if (rc < 0) |
1587 | return rc; |
1588 | cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); |
1589 | return 0; |
1590 | } |
1591 | |
1592 | static void __exit cxgb4i_exit_module(void) |
1593 | { |
1594 | cxgb4_unregister_uld(CXGB4_ULD_ISCSI); |
1595 | cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); |
1596 | cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); |
1597 | } |
1598 | |
1599 | module_init(cxgb4i_init_module); |
1600 | module_exit(cxgb4i_exit_module); |