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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 | ||
7b36b6e0 | 16 | #include <linux/module.h> |
17 | #include <linux/moduleparam.h> | |
18 | #include <scsi/scsi_host.h> | |
19 | #include <net/tcp.h> | |
20 | #include <net/dst.h> | |
21 | #include <linux/netdevice.h> | |
22 | ||
23 | #include "t4_msg.h" | |
24 | #include "cxgb4.h" | |
25 | #include "cxgb4_uld.h" | |
26 | #include "t4fw_api.h" | |
27 | #include "l2t.h" | |
28 | #include "cxgb4i.h" | |
29 | ||
30 | static unsigned int dbg_level; | |
31 | ||
32 | #include "../libcxgbi.h" | |
33 | ||
34 | #define DRV_MODULE_NAME "cxgb4i" | |
35 | #define DRV_MODULE_DESC "Chelsio T4 iSCSI Driver" | |
e27d6169 | 36 | #define DRV_MODULE_VERSION "0.9.1" |
37 | #define DRV_MODULE_RELDATE "Aug. 2010" | |
7b36b6e0 | 38 | |
39 | static char version[] = | |
40 | DRV_MODULE_DESC " " DRV_MODULE_NAME | |
41 | " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; | |
42 | ||
43 | MODULE_AUTHOR("Chelsio Communications, Inc."); | |
44 | MODULE_DESCRIPTION(DRV_MODULE_DESC); | |
45 | MODULE_VERSION(DRV_MODULE_VERSION); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
48 | module_param(dbg_level, uint, 0644); | |
49 | MODULE_PARM_DESC(dbg_level, "Debug flag (default=0)"); | |
50 | ||
51 | static int cxgb4i_rcv_win = 256 * 1024; | |
52 | module_param(cxgb4i_rcv_win, int, 0644); | |
53 | MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes"); | |
54 | ||
55 | static int cxgb4i_snd_win = 128 * 1024; | |
56 | module_param(cxgb4i_snd_win, int, 0644); | |
57 | MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes"); | |
58 | ||
59 | static int cxgb4i_rx_credit_thres = 10 * 1024; | |
60 | module_param(cxgb4i_rx_credit_thres, int, 0644); | |
61 | MODULE_PARM_DESC(cxgb4i_rx_credit_thres, | |
62 | "RX credits return threshold in bytes (default=10KB)"); | |
63 | ||
64 | static unsigned int cxgb4i_max_connect = (8 * 1024); | |
65 | module_param(cxgb4i_max_connect, uint, 0644); | |
66 | MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections"); | |
67 | ||
68 | static unsigned short cxgb4i_sport_base = 20000; | |
69 | module_param(cxgb4i_sport_base, ushort, 0644); | |
70 | MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)"); | |
71 | ||
72 | typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *); | |
73 | ||
74 | static void *t4_uld_add(const struct cxgb4_lld_info *); | |
75 | static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *); | |
76 | static int t4_uld_state_change(void *, enum cxgb4_state state); | |
77 | ||
78 | static const struct cxgb4_uld_info cxgb4i_uld_info = { | |
79 | .name = DRV_MODULE_NAME, | |
80 | .add = t4_uld_add, | |
81 | .rx_handler = t4_uld_rx_handler, | |
82 | .state_change = t4_uld_state_change, | |
83 | }; | |
84 | ||
85 | static struct scsi_host_template cxgb4i_host_template = { | |
86 | .module = THIS_MODULE, | |
87 | .name = DRV_MODULE_NAME, | |
88 | .proc_name = DRV_MODULE_NAME, | |
89 | .can_queue = CXGB4I_SCSI_HOST_QDEPTH, | |
90 | .queuecommand = iscsi_queuecommand, | |
91 | .change_queue_depth = iscsi_change_queue_depth, | |
92 | .sg_tablesize = SG_ALL, | |
93 | .max_sectors = 0xFFFF, | |
94 | .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, | |
95 | .eh_abort_handler = iscsi_eh_abort, | |
96 | .eh_device_reset_handler = iscsi_eh_device_reset, | |
97 | .eh_target_reset_handler = iscsi_eh_recover_target, | |
98 | .target_alloc = iscsi_target_alloc, | |
99 | .use_clustering = DISABLE_CLUSTERING, | |
100 | .this_id = -1, | |
101 | }; | |
102 | ||
103 | static struct iscsi_transport cxgb4i_iscsi_transport = { | |
104 | .owner = THIS_MODULE, | |
105 | .name = DRV_MODULE_NAME, | |
106 | .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | | |
107 | CAP_DATADGST | CAP_DIGEST_OFFLOAD | | |
fdafd4df | 108 | CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, |
3128c6c7 | 109 | .attr_is_visible = cxgbi_attr_is_visible, |
7b36b6e0 | 110 | .get_host_param = cxgbi_get_host_param, |
111 | .set_host_param = cxgbi_set_host_param, | |
112 | /* session management */ | |
113 | .create_session = cxgbi_create_session, | |
114 | .destroy_session = cxgbi_destroy_session, | |
115 | .get_session_param = iscsi_session_get_param, | |
116 | /* connection management */ | |
117 | .create_conn = cxgbi_create_conn, | |
118 | .bind_conn = cxgbi_bind_conn, | |
119 | .destroy_conn = iscsi_tcp_conn_teardown, | |
120 | .start_conn = iscsi_conn_start, | |
121 | .stop_conn = iscsi_conn_stop, | |
c71b9b66 | 122 | .get_conn_param = iscsi_conn_get_param, |
7b36b6e0 | 123 | .set_param = cxgbi_set_conn_param, |
124 | .get_stats = cxgbi_get_conn_stats, | |
125 | /* pdu xmit req from user space */ | |
126 | .send_pdu = iscsi_conn_send_pdu, | |
127 | /* task */ | |
128 | .init_task = iscsi_tcp_task_init, | |
129 | .xmit_task = iscsi_tcp_task_xmit, | |
130 | .cleanup_task = cxgbi_cleanup_task, | |
131 | /* pdu */ | |
132 | .alloc_pdu = cxgbi_conn_alloc_pdu, | |
133 | .init_pdu = cxgbi_conn_init_pdu, | |
134 | .xmit_pdu = cxgbi_conn_xmit_pdu, | |
135 | .parse_pdu_itt = cxgbi_parse_pdu_itt, | |
136 | /* TCP connect/disconnect */ | |
c71b9b66 | 137 | .get_ep_param = cxgbi_get_ep_param, |
7b36b6e0 | 138 | .ep_connect = cxgbi_ep_connect, |
139 | .ep_poll = cxgbi_ep_poll, | |
140 | .ep_disconnect = cxgbi_ep_disconnect, | |
141 | /* Error recovery timeout call */ | |
142 | .session_recovery_timedout = iscsi_session_recovery_timedout, | |
143 | }; | |
144 | ||
145 | static struct scsi_transport_template *cxgb4i_stt; | |
146 | ||
147 | /* | |
148 | * CPL (Chelsio Protocol Language) defines a message passing interface between | |
149 | * the host driver and Chelsio asic. | |
150 | * The section below implments CPLs that related to iscsi tcp connection | |
151 | * open/close/abort and data send/receive. | |
152 | */ | |
153 | #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) | |
154 | #define RCV_BUFSIZ_MASK 0x3FFU | |
155 | #define MAX_IMM_TX_PKT_LEN 128 | |
156 | ||
157 | static inline void set_queue(struct sk_buff *skb, unsigned int queue, | |
158 | const struct cxgbi_sock *csk) | |
159 | { | |
160 | skb->queue_mapping = queue; | |
161 | } | |
162 | ||
163 | static int push_tx_frames(struct cxgbi_sock *, int); | |
164 | ||
165 | /* | |
166 | * is_ofld_imm - check whether a packet can be sent as immediate data | |
167 | * @skb: the packet | |
168 | * | |
169 | * Returns true if a packet can be sent as an offload WR with immediate | |
170 | * data. We currently use the same limit as for Ethernet packets. | |
171 | */ | |
172 | static inline int is_ofld_imm(const struct sk_buff *skb) | |
173 | { | |
174 | return skb->len <= (MAX_IMM_TX_PKT_LEN - | |
175 | sizeof(struct fw_ofld_tx_data_wr)); | |
176 | } | |
177 | ||
178 | static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, | |
179 | struct l2t_entry *e) | |
180 | { | |
181 | struct cpl_act_open_req *req; | |
182 | int wscale = cxgbi_sock_compute_wscale(csk->mss_idx); | |
183 | unsigned long long opt0; | |
184 | unsigned int opt2; | |
185 | unsigned int qid_atid = ((unsigned int)csk->atid) | | |
186 | (((unsigned int)csk->rss_qid) << 14); | |
187 | ||
188 | opt0 = KEEP_ALIVE(1) | | |
189 | WND_SCALE(wscale) | | |
190 | MSS_IDX(csk->mss_idx) | | |
191 | L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) | | |
192 | TX_CHAN(csk->tx_chan) | | |
193 | SMAC_SEL(csk->smac_idx) | | |
194 | ULP_MODE(ULP_MODE_ISCSI) | | |
195 | RCV_BUFSIZ(cxgb4i_rcv_win >> 10); | |
196 | opt2 = RX_CHANNEL(0) | | |
197 | RSS_QUEUE_VALID | | |
198 | (1 << 20) | (1 << 22) | | |
199 | RSS_QUEUE(csk->rss_qid); | |
200 | ||
201 | set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); | |
202 | req = (struct cpl_act_open_req *)skb->head; | |
203 | ||
204 | INIT_TP_WR(req, 0); | |
205 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, | |
206 | qid_atid)); | |
207 | req->local_port = csk->saddr.sin_port; | |
208 | req->peer_port = csk->daddr.sin_port; | |
209 | req->local_ip = csk->saddr.sin_addr.s_addr; | |
210 | req->peer_ip = csk->daddr.sin_addr.s_addr; | |
211 | req->opt0 = cpu_to_be64(opt0); | |
212 | req->params = 0; | |
213 | req->opt2 = cpu_to_be32(opt2); | |
214 | ||
215 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
216 | "csk 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n", | |
217 | csk, &req->local_ip, ntohs(req->local_port), | |
218 | &req->peer_ip, ntohs(req->peer_port), | |
219 | csk->atid, csk->rss_qid); | |
220 | ||
221 | cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); | |
222 | } | |
223 | ||
224 | static void send_close_req(struct cxgbi_sock *csk) | |
225 | { | |
226 | struct sk_buff *skb = csk->cpl_close; | |
227 | struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; | |
228 | unsigned int tid = csk->tid; | |
229 | ||
230 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
231 | "csk 0x%p,%u,0x%lx, tid %u.\n", | |
232 | csk, csk->state, csk->flags, csk->tid); | |
233 | csk->cpl_close = NULL; | |
234 | set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); | |
235 | INIT_TP_WR(req, tid); | |
236 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); | |
237 | req->rsvd = 0; | |
238 | ||
239 | cxgbi_sock_skb_entail(csk, skb); | |
240 | if (csk->state >= CTP_ESTABLISHED) | |
241 | push_tx_frames(csk, 1); | |
242 | } | |
243 | ||
244 | static void abort_arp_failure(void *handle, struct sk_buff *skb) | |
245 | { | |
246 | struct cxgbi_sock *csk = (struct cxgbi_sock *)handle; | |
247 | struct cpl_abort_req *req; | |
248 | ||
249 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
250 | "csk 0x%p,%u,0x%lx, tid %u, abort.\n", | |
251 | csk, csk->state, csk->flags, csk->tid); | |
252 | req = (struct cpl_abort_req *)skb->data; | |
253 | req->cmd = CPL_ABORT_NO_RST; | |
254 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); | |
255 | } | |
256 | ||
257 | static void send_abort_req(struct cxgbi_sock *csk) | |
258 | { | |
259 | struct cpl_abort_req *req; | |
260 | struct sk_buff *skb = csk->cpl_abort_req; | |
261 | ||
262 | if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev) | |
263 | return; | |
264 | cxgbi_sock_set_state(csk, CTP_ABORTING); | |
265 | cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); | |
266 | cxgbi_sock_purge_write_queue(csk); | |
267 | ||
268 | csk->cpl_abort_req = NULL; | |
269 | req = (struct cpl_abort_req *)skb->head; | |
270 | set_queue(skb, CPL_PRIORITY_DATA, csk); | |
271 | req->cmd = CPL_ABORT_SEND_RST; | |
272 | t4_set_arp_err_handler(skb, csk, abort_arp_failure); | |
273 | INIT_TP_WR(req, csk->tid); | |
274 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); | |
275 | req->rsvd0 = htonl(csk->snd_nxt); | |
276 | req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); | |
277 | ||
278 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
279 | "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", | |
280 | csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, | |
281 | req->rsvd1); | |
282 | ||
283 | cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); | |
284 | } | |
285 | ||
286 | static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) | |
287 | { | |
288 | struct sk_buff *skb = csk->cpl_abort_rpl; | |
289 | struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; | |
290 | ||
291 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
292 | "csk 0x%p,%u,0x%lx,%u, status %d.\n", | |
293 | csk, csk->state, csk->flags, csk->tid, rst_status); | |
294 | ||
295 | csk->cpl_abort_rpl = NULL; | |
296 | set_queue(skb, CPL_PRIORITY_DATA, csk); | |
297 | INIT_TP_WR(rpl, csk->tid); | |
298 | OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); | |
299 | rpl->cmd = rst_status; | |
300 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); | |
301 | } | |
302 | ||
303 | /* | |
304 | * CPL connection rx data ack: host -> | |
305 | * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of | |
306 | * credits sent. | |
307 | */ | |
308 | static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) | |
309 | { | |
310 | struct sk_buff *skb; | |
311 | struct cpl_rx_data_ack *req; | |
312 | ||
313 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
314 | "csk 0x%p,%u,0x%lx,%u, credit %u.\n", | |
315 | csk, csk->state, csk->flags, csk->tid, credits); | |
316 | ||
24d3f95a | 317 | skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); |
7b36b6e0 | 318 | if (!skb) { |
319 | pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); | |
320 | return 0; | |
321 | } | |
322 | req = (struct cpl_rx_data_ack *)skb->head; | |
323 | ||
324 | set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id); | |
325 | INIT_TP_WR(req, csk->tid); | |
326 | OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, | |
327 | csk->tid)); | |
328 | req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1)); | |
329 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); | |
330 | return credits; | |
331 | } | |
332 | ||
333 | /* | |
334 | * sgl_len - calculates the size of an SGL of the given capacity | |
335 | * @n: the number of SGL entries | |
336 | * Calculates the number of flits needed for a scatter/gather list that | |
337 | * can hold the given number of entries. | |
338 | */ | |
339 | static inline unsigned int sgl_len(unsigned int n) | |
340 | { | |
341 | n--; | |
342 | return (3 * n) / 2 + (n & 1) + 2; | |
343 | } | |
344 | ||
345 | /* | |
346 | * calc_tx_flits_ofld - calculate # of flits for an offload packet | |
347 | * @skb: the packet | |
348 | * | |
349 | * Returns the number of flits needed for the given offload packet. | |
350 | * These packets are already fully constructed and no additional headers | |
351 | * will be added. | |
352 | */ | |
353 | static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb) | |
354 | { | |
355 | unsigned int flits, cnt; | |
356 | ||
357 | if (is_ofld_imm(skb)) | |
358 | return DIV_ROUND_UP(skb->len, 8); | |
359 | flits = skb_transport_offset(skb) / 8; | |
360 | cnt = skb_shinfo(skb)->nr_frags; | |
361 | if (skb->tail != skb->transport_header) | |
362 | cnt++; | |
363 | return flits + sgl_len(cnt); | |
364 | } | |
365 | ||
366 | static inline void send_tx_flowc_wr(struct cxgbi_sock *csk) | |
367 | { | |
368 | struct sk_buff *skb; | |
369 | struct fw_flowc_wr *flowc; | |
370 | int flowclen, i; | |
371 | ||
372 | flowclen = 80; | |
24d3f95a | 373 | skb = alloc_wr(flowclen, 0, GFP_ATOMIC); |
7b36b6e0 | 374 | flowc = (struct fw_flowc_wr *)skb->head; |
375 | flowc->op_to_nparams = | |
376 | htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8)); | |
377 | flowc->flowid_len16 = | |
378 | htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) | | |
379 | FW_WR_FLOWID(csk->tid)); | |
380 | flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; | |
e27d6169 | 381 | flowc->mnemval[0].val = htonl(csk->cdev->pfvf); |
7b36b6e0 | 382 | flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; |
383 | flowc->mnemval[1].val = htonl(csk->tx_chan); | |
384 | flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; | |
385 | flowc->mnemval[2].val = htonl(csk->tx_chan); | |
386 | flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; | |
387 | flowc->mnemval[3].val = htonl(csk->rss_qid); | |
388 | flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; | |
389 | flowc->mnemval[4].val = htonl(csk->snd_nxt); | |
390 | flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; | |
391 | flowc->mnemval[5].val = htonl(csk->rcv_nxt); | |
392 | flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; | |
393 | flowc->mnemval[6].val = htonl(cxgb4i_snd_win); | |
394 | flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; | |
395 | flowc->mnemval[7].val = htonl(csk->advmss); | |
396 | flowc->mnemval[8].mnemonic = 0; | |
397 | flowc->mnemval[8].val = 0; | |
398 | for (i = 0; i < 9; i++) { | |
399 | flowc->mnemval[i].r4[0] = 0; | |
400 | flowc->mnemval[i].r4[1] = 0; | |
401 | flowc->mnemval[i].r4[2] = 0; | |
402 | } | |
403 | set_queue(skb, CPL_PRIORITY_DATA, csk); | |
404 | ||
405 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
406 | "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n", | |
407 | csk, csk->tid, 0, csk->tx_chan, csk->rss_qid, | |
408 | csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win, | |
409 | csk->advmss); | |
410 | ||
411 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); | |
412 | } | |
413 | ||
414 | static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, | |
415 | int dlen, int len, u32 credits, int compl) | |
416 | { | |
417 | struct fw_ofld_tx_data_wr *req; | |
418 | unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3; | |
419 | unsigned int wr_ulp_mode = 0; | |
420 | ||
421 | req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req)); | |
422 | ||
423 | if (is_ofld_imm(skb)) { | |
424 | req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) | | |
425 | FW_WR_COMPL(1) | | |
426 | FW_WR_IMMDLEN(dlen)); | |
427 | req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) | | |
428 | FW_WR_LEN16(credits)); | |
429 | } else { | |
430 | req->op_to_immdlen = | |
431 | cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) | | |
432 | FW_WR_COMPL(1) | | |
433 | FW_WR_IMMDLEN(0)); | |
434 | req->flowid_len16 = | |
435 | cpu_to_be32(FW_WR_FLOWID(csk->tid) | | |
436 | FW_WR_LEN16(credits)); | |
437 | } | |
438 | if (submode) | |
439 | wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) | | |
440 | FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode); | |
6aca4112 KX |
441 | req->tunnel_to_proxy = htonl(wr_ulp_mode | |
442 | FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1)); | |
7b36b6e0 | 443 | req->plen = htonl(len); |
444 | if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) | |
445 | cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); | |
446 | } | |
447 | ||
448 | static void arp_failure_skb_discard(void *handle, struct sk_buff *skb) | |
449 | { | |
450 | kfree_skb(skb); | |
451 | } | |
452 | ||
453 | static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) | |
454 | { | |
455 | int total_size = 0; | |
456 | struct sk_buff *skb; | |
457 | ||
458 | if (unlikely(csk->state < CTP_ESTABLISHED || | |
459 | csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { | |
460 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK | | |
461 | 1 << CXGBI_DBG_PDU_TX, | |
462 | "csk 0x%p,%u,0x%lx,%u, in closing state.\n", | |
463 | csk, csk->state, csk->flags, csk->tid); | |
464 | return 0; | |
465 | } | |
466 | ||
467 | while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { | |
468 | int dlen = skb->len; | |
469 | int len = skb->len; | |
470 | unsigned int credits_needed; | |
471 | ||
472 | skb_reset_transport_header(skb); | |
473 | if (is_ofld_imm(skb)) | |
474 | credits_needed = DIV_ROUND_UP(dlen + | |
475 | sizeof(struct fw_ofld_tx_data_wr), 16); | |
476 | else | |
477 | credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb) | |
478 | + sizeof(struct fw_ofld_tx_data_wr), | |
479 | 16); | |
480 | ||
481 | if (csk->wr_cred < credits_needed) { | |
482 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
483 | "csk 0x%p, skb %u/%u, wr %d < %u.\n", | |
484 | csk, skb->len, skb->data_len, | |
485 | credits_needed, csk->wr_cred); | |
486 | break; | |
487 | } | |
488 | __skb_unlink(skb, &csk->write_queue); | |
489 | set_queue(skb, CPL_PRIORITY_DATA, csk); | |
490 | skb->csum = credits_needed; | |
491 | csk->wr_cred -= credits_needed; | |
492 | csk->wr_una_cred += credits_needed; | |
493 | cxgbi_sock_enqueue_wr(csk, skb); | |
494 | ||
495 | log_debug(1 << CXGBI_DBG_PDU_TX, | |
496 | "csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n", | |
497 | csk, skb->len, skb->data_len, credits_needed, | |
498 | csk->wr_cred, csk->wr_una_cred); | |
499 | ||
500 | if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { | |
501 | if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { | |
502 | send_tx_flowc_wr(csk); | |
503 | skb->csum += 5; | |
504 | csk->wr_cred -= 5; | |
505 | csk->wr_una_cred += 5; | |
506 | } | |
507 | len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); | |
508 | make_tx_data_wr(csk, skb, dlen, len, credits_needed, | |
509 | req_completion); | |
510 | csk->snd_nxt += len; | |
511 | cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); | |
512 | } | |
513 | total_size += skb->truesize; | |
514 | t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard); | |
515 | ||
516 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, | |
517 | "csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n", | |
518 | csk, csk->state, csk->flags, csk->tid, skb, len); | |
519 | ||
520 | cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t); | |
521 | } | |
522 | return total_size; | |
523 | } | |
524 | ||
525 | static inline void free_atid(struct cxgbi_sock *csk) | |
526 | { | |
527 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev); | |
528 | ||
529 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { | |
530 | cxgb4_free_atid(lldi->tids, csk->atid); | |
531 | cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); | |
532 | cxgbi_sock_put(csk); | |
533 | } | |
534 | } | |
535 | ||
536 | static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb) | |
537 | { | |
538 | struct cxgbi_sock *csk; | |
539 | struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data; | |
540 | unsigned short tcp_opt = ntohs(req->tcp_opt); | |
541 | unsigned int tid = GET_TID(req); | |
542 | unsigned int atid = GET_TID_TID(ntohl(req->tos_atid)); | |
543 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
544 | struct tid_info *t = lldi->tids; | |
545 | u32 rcv_isn = be32_to_cpu(req->rcv_isn); | |
546 | ||
547 | csk = lookup_atid(t, atid); | |
548 | if (unlikely(!csk)) { | |
549 | pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev); | |
550 | goto rel_skb; | |
551 | } | |
552 | ||
e27d6169 | 553 | if (csk->atid != atid) { |
554 | pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n", | |
555 | atid, csk, csk->state, csk->flags, csk->tid, csk->atid); | |
556 | goto rel_skb; | |
557 | } | |
558 | ||
7b36b6e0 | 559 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
560 | "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n", | |
561 | csk, csk->state, csk->flags, tid, atid, rcv_isn); | |
562 | ||
563 | cxgbi_sock_get(csk); | |
564 | csk->tid = tid; | |
565 | cxgb4_insert_tid(lldi->tids, csk, tid); | |
566 | cxgbi_sock_set_flag(csk, CTPF_HAS_TID); | |
567 | ||
568 | free_atid(csk); | |
569 | ||
570 | spin_lock_bh(&csk->lock); | |
571 | if (unlikely(csk->state != CTP_ACTIVE_OPEN)) | |
572 | pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", | |
573 | csk, csk->state, csk->flags, csk->tid); | |
574 | ||
575 | if (csk->retry_timer.function) { | |
576 | del_timer(&csk->retry_timer); | |
577 | csk->retry_timer.function = NULL; | |
578 | } | |
579 | ||
580 | csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; | |
581 | /* | |
582 | * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't | |
583 | * pass through opt0. | |
584 | */ | |
585 | if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10)) | |
586 | csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10); | |
587 | ||
588 | csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40; | |
589 | if (GET_TCPOPT_TSTAMP(tcp_opt)) | |
590 | csk->advmss -= 12; | |
591 | if (csk->advmss < 128) | |
592 | csk->advmss = 128; | |
593 | ||
594 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
595 | "csk 0x%p, mss_idx %u, advmss %u.\n", | |
596 | csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss); | |
597 | ||
598 | cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); | |
599 | ||
600 | if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) | |
601 | send_abort_req(csk); | |
602 | else { | |
603 | if (skb_queue_len(&csk->write_queue)) | |
604 | push_tx_frames(csk, 0); | |
605 | cxgbi_conn_tx_open(csk); | |
606 | } | |
607 | spin_unlock_bh(&csk->lock); | |
608 | ||
609 | rel_skb: | |
610 | __kfree_skb(skb); | |
611 | } | |
612 | ||
613 | static int act_open_rpl_status_to_errno(int status) | |
614 | { | |
615 | switch (status) { | |
616 | case CPL_ERR_CONN_RESET: | |
617 | return -ECONNREFUSED; | |
618 | case CPL_ERR_ARP_MISS: | |
619 | return -EHOSTUNREACH; | |
620 | case CPL_ERR_CONN_TIMEDOUT: | |
621 | return -ETIMEDOUT; | |
622 | case CPL_ERR_TCAM_FULL: | |
623 | return -ENOMEM; | |
624 | case CPL_ERR_CONN_EXIST: | |
625 | return -EADDRINUSE; | |
626 | default: | |
627 | return -EIO; | |
628 | } | |
629 | } | |
630 | ||
631 | static void csk_act_open_retry_timer(unsigned long data) | |
632 | { | |
633 | struct sk_buff *skb; | |
634 | struct cxgbi_sock *csk = (struct cxgbi_sock *)data; | |
635 | ||
636 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
637 | "csk 0x%p,%u,0x%lx,%u.\n", | |
638 | csk, csk->state, csk->flags, csk->tid); | |
639 | ||
640 | cxgbi_sock_get(csk); | |
641 | spin_lock_bh(&csk->lock); | |
24d3f95a | 642 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); |
7b36b6e0 | 643 | if (!skb) |
644 | cxgbi_sock_fail_act_open(csk, -ENOMEM); | |
645 | else { | |
646 | skb->sk = (struct sock *)csk; | |
647 | t4_set_arp_err_handler(skb, csk, | |
648 | cxgbi_sock_act_open_req_arp_failure); | |
649 | send_act_open_req(csk, skb, csk->l2t); | |
650 | } | |
651 | spin_unlock_bh(&csk->lock); | |
652 | cxgbi_sock_put(csk); | |
653 | } | |
654 | ||
655 | static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) | |
656 | { | |
657 | struct cxgbi_sock *csk; | |
658 | struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data; | |
659 | unsigned int tid = GET_TID(rpl); | |
660 | unsigned int atid = | |
661 | GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status))); | |
662 | unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status)); | |
663 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
664 | struct tid_info *t = lldi->tids; | |
665 | ||
666 | csk = lookup_atid(t, atid); | |
667 | if (unlikely(!csk)) { | |
668 | pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid); | |
669 | goto rel_skb; | |
670 | } | |
671 | ||
e27d6169 | 672 | pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n", |
673 | &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), | |
674 | &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port), | |
675 | atid, tid, status, csk, csk->state, csk->flags); | |
7b36b6e0 | 676 | |
150cca7c KX |
677 | if (status == CPL_ERR_RTX_NEG_ADVICE) |
678 | goto rel_skb; | |
679 | ||
7b36b6e0 | 680 | if (status && status != CPL_ERR_TCAM_FULL && |
681 | status != CPL_ERR_CONN_EXIST && | |
682 | status != CPL_ERR_ARP_MISS) | |
683 | cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl)); | |
684 | ||
685 | cxgbi_sock_get(csk); | |
686 | spin_lock_bh(&csk->lock); | |
687 | ||
688 | if (status == CPL_ERR_CONN_EXIST && | |
689 | csk->retry_timer.function != csk_act_open_retry_timer) { | |
690 | csk->retry_timer.function = csk_act_open_retry_timer; | |
691 | mod_timer(&csk->retry_timer, jiffies + HZ / 2); | |
692 | } else | |
693 | cxgbi_sock_fail_act_open(csk, | |
694 | act_open_rpl_status_to_errno(status)); | |
695 | ||
696 | spin_unlock_bh(&csk->lock); | |
697 | cxgbi_sock_put(csk); | |
698 | rel_skb: | |
699 | __kfree_skb(skb); | |
700 | } | |
701 | ||
702 | static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb) | |
703 | { | |
704 | struct cxgbi_sock *csk; | |
705 | struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data; | |
706 | unsigned int tid = GET_TID(req); | |
707 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
708 | struct tid_info *t = lldi->tids; | |
709 | ||
710 | csk = lookup_tid(t, tid); | |
711 | if (unlikely(!csk)) { | |
712 | pr_err("can't find connection for tid %u.\n", tid); | |
713 | goto rel_skb; | |
714 | } | |
715 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
716 | "csk 0x%p,%u,0x%lx,%u.\n", | |
717 | csk, csk->state, csk->flags, csk->tid); | |
718 | cxgbi_sock_rcv_peer_close(csk); | |
719 | rel_skb: | |
720 | __kfree_skb(skb); | |
721 | } | |
722 | ||
723 | static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) | |
724 | { | |
725 | struct cxgbi_sock *csk; | |
726 | struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data; | |
727 | unsigned int tid = GET_TID(rpl); | |
728 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
729 | struct tid_info *t = lldi->tids; | |
730 | ||
731 | csk = lookup_tid(t, tid); | |
732 | if (unlikely(!csk)) { | |
733 | pr_err("can't find connection for tid %u.\n", tid); | |
734 | goto rel_skb; | |
735 | } | |
736 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
737 | "csk 0x%p,%u,0x%lx,%u.\n", | |
738 | csk, csk->state, csk->flags, csk->tid); | |
739 | cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); | |
740 | rel_skb: | |
741 | __kfree_skb(skb); | |
742 | } | |
743 | ||
744 | static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, | |
745 | int *need_rst) | |
746 | { | |
747 | switch (abort_reason) { | |
748 | case CPL_ERR_BAD_SYN: /* fall through */ | |
749 | case CPL_ERR_CONN_RESET: | |
750 | return csk->state > CTP_ESTABLISHED ? | |
751 | -EPIPE : -ECONNRESET; | |
752 | case CPL_ERR_XMIT_TIMEDOUT: | |
753 | case CPL_ERR_PERSIST_TIMEDOUT: | |
754 | case CPL_ERR_FINWAIT2_TIMEDOUT: | |
755 | case CPL_ERR_KEEPALIVE_TIMEDOUT: | |
756 | return -ETIMEDOUT; | |
757 | default: | |
758 | return -EIO; | |
759 | } | |
760 | } | |
761 | ||
762 | static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb) | |
763 | { | |
764 | struct cxgbi_sock *csk; | |
765 | struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data; | |
766 | unsigned int tid = GET_TID(req); | |
767 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
768 | struct tid_info *t = lldi->tids; | |
769 | int rst_status = CPL_ABORT_NO_RST; | |
770 | ||
771 | csk = lookup_tid(t, tid); | |
772 | if (unlikely(!csk)) { | |
773 | pr_err("can't find connection for tid %u.\n", tid); | |
774 | goto rel_skb; | |
775 | } | |
776 | ||
777 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
778 | "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n", | |
779 | csk, csk->state, csk->flags, csk->tid, req->status); | |
780 | ||
781 | if (req->status == CPL_ERR_RTX_NEG_ADVICE || | |
782 | req->status == CPL_ERR_PERSIST_NEG_ADVICE) | |
783 | goto rel_skb; | |
784 | ||
785 | cxgbi_sock_get(csk); | |
786 | spin_lock_bh(&csk->lock); | |
787 | ||
788 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { | |
789 | cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); | |
790 | cxgbi_sock_set_state(csk, CTP_ABORTING); | |
791 | goto done; | |
792 | } | |
793 | ||
794 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); | |
795 | send_abort_rpl(csk, rst_status); | |
796 | ||
797 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { | |
798 | csk->err = abort_status_to_errno(csk, req->status, &rst_status); | |
799 | cxgbi_sock_closed(csk); | |
800 | } | |
801 | done: | |
802 | spin_unlock_bh(&csk->lock); | |
803 | cxgbi_sock_put(csk); | |
804 | rel_skb: | |
805 | __kfree_skb(skb); | |
806 | } | |
807 | ||
808 | static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb) | |
809 | { | |
810 | struct cxgbi_sock *csk; | |
811 | struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data; | |
812 | unsigned int tid = GET_TID(rpl); | |
813 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
814 | struct tid_info *t = lldi->tids; | |
815 | ||
816 | csk = lookup_tid(t, tid); | |
817 | if (!csk) | |
818 | goto rel_skb; | |
819 | ||
820 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
821 | "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", | |
822 | rpl->status, csk, csk ? csk->state : 0, | |
823 | csk ? csk->flags : 0UL); | |
824 | ||
825 | if (rpl->status == CPL_ERR_ABORT_FAILED) | |
826 | goto rel_skb; | |
827 | ||
828 | cxgbi_sock_rcv_abort_rpl(csk); | |
829 | rel_skb: | |
830 | __kfree_skb(skb); | |
831 | } | |
832 | ||
833 | static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb) | |
834 | { | |
835 | struct cxgbi_sock *csk; | |
836 | struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data; | |
837 | unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp); | |
838 | unsigned int tid = GET_TID(cpl); | |
839 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
840 | struct tid_info *t = lldi->tids; | |
7b36b6e0 | 841 | |
842 | csk = lookup_tid(t, tid); | |
843 | if (unlikely(!csk)) { | |
844 | pr_err("can't find conn. for tid %u.\n", tid); | |
845 | goto rel_skb; | |
846 | } | |
847 | ||
848 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
849 | "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n", | |
850 | csk, csk->state, csk->flags, csk->tid, skb, skb->len, | |
851 | pdu_len_ddp); | |
852 | ||
853 | spin_lock_bh(&csk->lock); | |
854 | ||
855 | if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { | |
856 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
857 | "csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
858 | csk, csk->state, csk->flags, csk->tid); | |
859 | if (csk->state != CTP_ABORTING) | |
860 | goto abort_conn; | |
861 | else | |
862 | goto discard; | |
863 | } | |
864 | ||
865 | cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq); | |
e27d6169 | 866 | cxgbi_skcb_flags(skb) = 0; |
867 | ||
7b36b6e0 | 868 | skb_reset_transport_header(skb); |
869 | __skb_pull(skb, sizeof(*cpl)); | |
870 | __pskb_trim(skb, ntohs(cpl->len)); | |
871 | ||
872 | if (!csk->skb_ulp_lhdr) { | |
873 | unsigned char *bhs; | |
874 | unsigned int hlen, dlen; | |
875 | ||
876 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
877 | "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n", | |
878 | csk, csk->state, csk->flags, csk->tid, skb); | |
879 | csk->skb_ulp_lhdr = skb; | |
e27d6169 | 880 | cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR); |
7b36b6e0 | 881 | |
e27d6169 | 882 | if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) { |
7b36b6e0 | 883 | pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n", |
e27d6169 | 884 | csk->tid, cxgbi_skcb_tcp_seq(skb), |
7b36b6e0 | 885 | csk->rcv_nxt); |
886 | goto abort_conn; | |
887 | } | |
888 | ||
e27d6169 | 889 | bhs = skb->data; |
7b36b6e0 | 890 | hlen = ntohs(cpl->len); |
891 | dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF; | |
892 | ||
893 | if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) { | |
894 | pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len " | |
895 | "mismatch %u != %u + %u, seq 0x%x.\n", | |
896 | csk->tid, ISCSI_PDU_LEN(pdu_len_ddp) - 40, | |
897 | hlen, dlen, cxgbi_skcb_tcp_seq(skb)); | |
898 | goto abort_conn; | |
899 | } | |
900 | ||
901 | cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3); | |
902 | if (dlen) | |
903 | cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len; | |
904 | csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb); | |
905 | ||
906 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
907 | "csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n", | |
908 | csk, skb, *bhs, hlen, dlen, | |
909 | ntohl(*((unsigned int *)(bhs + 16))), | |
910 | ntohl(*((unsigned int *)(bhs + 24)))); | |
911 | ||
912 | } else { | |
e27d6169 | 913 | struct sk_buff *lskb = csk->skb_ulp_lhdr; |
7b36b6e0 | 914 | |
e27d6169 | 915 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA); |
7b36b6e0 | 916 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
917 | "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n", | |
918 | csk, csk->state, csk->flags, skb, lskb); | |
919 | } | |
920 | ||
921 | __skb_queue_tail(&csk->receive_queue, skb); | |
922 | spin_unlock_bh(&csk->lock); | |
923 | return; | |
924 | ||
925 | abort_conn: | |
926 | send_abort_req(csk); | |
927 | discard: | |
928 | spin_unlock_bh(&csk->lock); | |
929 | rel_skb: | |
930 | __kfree_skb(skb); | |
931 | } | |
932 | ||
933 | static void do_rx_data_ddp(struct cxgbi_device *cdev, | |
934 | struct sk_buff *skb) | |
935 | { | |
936 | struct cxgbi_sock *csk; | |
937 | struct sk_buff *lskb; | |
938 | struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data; | |
939 | unsigned int tid = GET_TID(rpl); | |
940 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
941 | struct tid_info *t = lldi->tids; | |
942 | unsigned int status = ntohl(rpl->ddpvld); | |
943 | ||
944 | csk = lookup_tid(t, tid); | |
945 | if (unlikely(!csk)) { | |
946 | pr_err("can't find connection for tid %u.\n", tid); | |
947 | goto rel_skb; | |
948 | } | |
949 | ||
950 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, | |
951 | "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n", | |
952 | csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr); | |
953 | ||
954 | spin_lock_bh(&csk->lock); | |
955 | ||
956 | if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { | |
957 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
958 | "csk 0x%p,%u,0x%lx,%u, bad state.\n", | |
959 | csk, csk->state, csk->flags, csk->tid); | |
960 | if (csk->state != CTP_ABORTING) | |
961 | goto abort_conn; | |
962 | else | |
963 | goto discard; | |
964 | } | |
965 | ||
966 | if (!csk->skb_ulp_lhdr) { | |
967 | pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid); | |
968 | goto abort_conn; | |
969 | } | |
970 | ||
971 | lskb = csk->skb_ulp_lhdr; | |
972 | csk->skb_ulp_lhdr = NULL; | |
973 | ||
7b36b6e0 | 974 | cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc); |
975 | ||
976 | if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) | |
977 | pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n", | |
978 | csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb)); | |
979 | ||
980 | if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) { | |
e27d6169 | 981 | pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n", |
982 | csk, lskb, status, cxgbi_skcb_flags(lskb)); | |
7b36b6e0 | 983 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR); |
984 | } | |
985 | if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) { | |
e27d6169 | 986 | pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n", |
987 | csk, lskb, status, cxgbi_skcb_flags(lskb)); | |
7b36b6e0 | 988 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR); |
989 | } | |
990 | if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) { | |
991 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
992 | "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n", | |
993 | csk, lskb, status); | |
994 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR); | |
995 | } | |
996 | if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) && | |
997 | !cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) { | |
998 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
999 | "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n", | |
1000 | csk, lskb, status); | |
1001 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD); | |
1002 | } | |
1003 | log_debug(1 << CXGBI_DBG_PDU_RX, | |
1004 | "csk 0x%p, lskb 0x%p, f 0x%lx.\n", | |
1005 | csk, lskb, cxgbi_skcb_flags(lskb)); | |
1006 | ||
e27d6169 | 1007 | cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS); |
7b36b6e0 | 1008 | cxgbi_conn_pdu_ready(csk); |
1009 | spin_unlock_bh(&csk->lock); | |
1010 | goto rel_skb; | |
1011 | ||
1012 | abort_conn: | |
1013 | send_abort_req(csk); | |
1014 | discard: | |
1015 | spin_unlock_bh(&csk->lock); | |
1016 | rel_skb: | |
1017 | __kfree_skb(skb); | |
1018 | } | |
1019 | ||
1020 | static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb) | |
1021 | { | |
1022 | struct cxgbi_sock *csk; | |
1023 | struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data; | |
1024 | unsigned int tid = GET_TID(rpl); | |
1025 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
1026 | struct tid_info *t = lldi->tids; | |
1027 | ||
1028 | csk = lookup_tid(t, tid); | |
1029 | if (unlikely(!csk)) | |
1030 | pr_err("can't find connection for tid %u.\n", tid); | |
1031 | else { | |
1032 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
1033 | "csk 0x%p,%u,0x%lx,%u.\n", | |
1034 | csk, csk->state, csk->flags, csk->tid); | |
1035 | cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una), | |
1036 | rpl->seq_vld); | |
1037 | } | |
1038 | __kfree_skb(skb); | |
1039 | } | |
1040 | ||
1041 | static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb) | |
1042 | { | |
1043 | struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data; | |
1044 | unsigned int tid = GET_TID(rpl); | |
1045 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
1046 | struct tid_info *t = lldi->tids; | |
1047 | struct cxgbi_sock *csk; | |
1048 | ||
1049 | csk = lookup_tid(t, tid); | |
1050 | if (!csk) | |
1051 | pr_err("can't find conn. for tid %u.\n", tid); | |
1052 | ||
1053 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
1054 | "csk 0x%p,%u,%lx,%u, status 0x%x.\n", | |
1055 | csk, csk->state, csk->flags, csk->tid, rpl->status); | |
1056 | ||
1057 | if (rpl->status != CPL_ERR_NONE) | |
1058 | pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n", | |
1059 | csk, tid, rpl->status); | |
1060 | ||
1061 | __kfree_skb(skb); | |
1062 | } | |
1063 | ||
1064 | static int alloc_cpls(struct cxgbi_sock *csk) | |
1065 | { | |
24d3f95a | 1066 | csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), |
1067 | 0, GFP_KERNEL); | |
7b36b6e0 | 1068 | if (!csk->cpl_close) |
1069 | return -ENOMEM; | |
1070 | ||
24d3f95a | 1071 | csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), |
1072 | 0, GFP_KERNEL); | |
7b36b6e0 | 1073 | if (!csk->cpl_abort_req) |
1074 | goto free_cpls; | |
1075 | ||
24d3f95a | 1076 | csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), |
1077 | 0, GFP_KERNEL); | |
7b36b6e0 | 1078 | if (!csk->cpl_abort_rpl) |
1079 | goto free_cpls; | |
1080 | return 0; | |
1081 | ||
1082 | free_cpls: | |
1083 | cxgbi_sock_free_cpl_skbs(csk); | |
1084 | return -ENOMEM; | |
1085 | } | |
1086 | ||
1087 | static inline void l2t_put(struct cxgbi_sock *csk) | |
1088 | { | |
1089 | if (csk->l2t) { | |
1090 | cxgb4_l2t_release(csk->l2t); | |
1091 | csk->l2t = NULL; | |
1092 | cxgbi_sock_put(csk); | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | static void release_offload_resources(struct cxgbi_sock *csk) | |
1097 | { | |
1098 | struct cxgb4_lld_info *lldi; | |
1099 | ||
1100 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
1101 | "csk 0x%p,%u,0x%lx,%u.\n", | |
1102 | csk, csk->state, csk->flags, csk->tid); | |
1103 | ||
1104 | cxgbi_sock_free_cpl_skbs(csk); | |
1105 | if (csk->wr_cred != csk->wr_max_cred) { | |
1106 | cxgbi_sock_purge_wr_queue(csk); | |
1107 | cxgbi_sock_reset_wr_list(csk); | |
1108 | } | |
1109 | ||
1110 | l2t_put(csk); | |
1111 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) | |
1112 | free_atid(csk); | |
1113 | else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { | |
1114 | lldi = cxgbi_cdev_priv(csk->cdev); | |
1115 | cxgb4_remove_tid(lldi->tids, 0, csk->tid); | |
1116 | cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); | |
1117 | cxgbi_sock_put(csk); | |
1118 | } | |
1119 | csk->dst = NULL; | |
1120 | csk->cdev = NULL; | |
1121 | } | |
1122 | ||
1123 | static int init_act_open(struct cxgbi_sock *csk) | |
1124 | { | |
1125 | struct cxgbi_device *cdev = csk->cdev; | |
1126 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
1127 | struct net_device *ndev = cdev->ports[csk->port_id]; | |
1128 | struct port_info *pi = netdev_priv(ndev); | |
1129 | struct sk_buff *skb = NULL; | |
51e059bd | 1130 | struct neighbour *n; |
7b36b6e0 | 1131 | unsigned int step; |
1132 | ||
1133 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
1134 | "csk 0x%p,%u,0x%lx,%u.\n", | |
1135 | csk, csk->state, csk->flags, csk->tid); | |
1136 | ||
1137 | csk->atid = cxgb4_alloc_atid(lldi->tids, csk); | |
1138 | if (csk->atid < 0) { | |
1139 | pr_err("%s, NO atid available.\n", ndev->name); | |
1140 | return -EINVAL; | |
1141 | } | |
1142 | cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); | |
1143 | cxgbi_sock_get(csk); | |
1144 | ||
c4737377 | 1145 | n = dst_neigh_lookup(csk->dst, &csk->daddr.sin_addr.s_addr); |
51e059bd DM |
1146 | if (!n) { |
1147 | pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name); | |
1148 | goto rel_resource; | |
1149 | } | |
1150 | csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0); | |
7b36b6e0 | 1151 | if (!csk->l2t) { |
1152 | pr_err("%s, cannot alloc l2t.\n", ndev->name); | |
1153 | goto rel_resource; | |
1154 | } | |
1155 | cxgbi_sock_get(csk); | |
1156 | ||
24d3f95a | 1157 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); |
7b36b6e0 | 1158 | if (!skb) |
1159 | goto rel_resource; | |
1160 | skb->sk = (struct sock *)csk; | |
1161 | t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure); | |
1162 | ||
1163 | if (!csk->mtu) | |
1164 | csk->mtu = dst_mtu(csk->dst); | |
1165 | cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx); | |
1166 | csk->tx_chan = cxgb4_port_chan(ndev); | |
1167 | /* SMT two entries per row */ | |
1168 | csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1; | |
1169 | step = lldi->ntxq / lldi->nchan; | |
1170 | csk->txq_idx = cxgb4_port_idx(ndev) * step; | |
1171 | step = lldi->nrxq / lldi->nchan; | |
1172 | csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step]; | |
1173 | csk->wr_max_cred = csk->wr_cred = lldi->wr_cred; | |
1174 | csk->wr_una_cred = 0; | |
1175 | cxgbi_sock_reset_wr_list(csk); | |
1176 | csk->err = 0; | |
1177 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
1178 | "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n", | |
1179 | csk, pi->port_id, ndev->name, csk->tx_chan, | |
1180 | csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx, | |
1181 | csk->smac_idx); | |
1182 | ||
1183 | cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); | |
1184 | send_act_open_req(csk, skb, csk->l2t); | |
c4737377 | 1185 | neigh_release(n); |
7b36b6e0 | 1186 | return 0; |
1187 | ||
1188 | rel_resource: | |
c4737377 DM |
1189 | if (n) |
1190 | neigh_release(n); | |
7b36b6e0 | 1191 | if (skb) |
1192 | __kfree_skb(skb); | |
1193 | return -EINVAL; | |
1194 | } | |
1195 | ||
1196 | cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = { | |
1197 | [CPL_ACT_ESTABLISH] = do_act_establish, | |
1198 | [CPL_ACT_OPEN_RPL] = do_act_open_rpl, | |
1199 | [CPL_PEER_CLOSE] = do_peer_close, | |
1200 | [CPL_ABORT_REQ_RSS] = do_abort_req_rss, | |
1201 | [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss, | |
1202 | [CPL_CLOSE_CON_RPL] = do_close_con_rpl, | |
1203 | [CPL_FW4_ACK] = do_fw4_ack, | |
1204 | [CPL_ISCSI_HDR] = do_rx_iscsi_hdr, | |
1205 | [CPL_SET_TCB_RPL] = do_set_tcb_rpl, | |
1206 | [CPL_RX_DATA_DDP] = do_rx_data_ddp, | |
1207 | }; | |
1208 | ||
1209 | int cxgb4i_ofld_init(struct cxgbi_device *cdev) | |
1210 | { | |
1211 | int rc; | |
1212 | ||
1213 | if (cxgb4i_max_connect > CXGB4I_MAX_CONN) | |
1214 | cxgb4i_max_connect = CXGB4I_MAX_CONN; | |
1215 | ||
1216 | rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base, | |
1217 | cxgb4i_max_connect); | |
1218 | if (rc < 0) | |
1219 | return rc; | |
1220 | ||
1221 | cdev->csk_release_offload_resources = release_offload_resources; | |
1222 | cdev->csk_push_tx_frames = push_tx_frames; | |
1223 | cdev->csk_send_abort_req = send_abort_req; | |
1224 | cdev->csk_send_close_req = send_close_req; | |
1225 | cdev->csk_send_rx_credits = send_rx_credits; | |
1226 | cdev->csk_alloc_cpls = alloc_cpls; | |
1227 | cdev->csk_init_act_open = init_act_open; | |
1228 | ||
1229 | pr_info("cdev 0x%p, offload up, added.\n", cdev); | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | /* | |
1234 | * functions to program the pagepod in h/w | |
1235 | */ | |
e27d6169 | 1236 | #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ |
7b36b6e0 | 1237 | static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req, |
e27d6169 | 1238 | unsigned int wr_len, unsigned int dlen, |
1239 | unsigned int pm_addr) | |
7b36b6e0 | 1240 | { |
e27d6169 | 1241 | struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); |
7b36b6e0 | 1242 | |
1243 | INIT_ULPTX_WR(req, wr_len, 0, 0); | |
e27d6169 | 1244 | req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1 << 23)); |
7b36b6e0 | 1245 | req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5)); |
1246 | req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5)); | |
1247 | req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); | |
e27d6169 | 1248 | |
1249 | idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM)); | |
1250 | idata->len = htonl(dlen); | |
7b36b6e0 | 1251 | } |
1252 | ||
e27d6169 | 1253 | static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id, |
7b36b6e0 | 1254 | struct cxgbi_pagepod_hdr *hdr, unsigned int idx, |
1255 | unsigned int npods, | |
1256 | struct cxgbi_gather_list *gl, | |
1257 | unsigned int gl_pidx) | |
1258 | { | |
1259 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
7b36b6e0 | 1260 | struct sk_buff *skb; |
1261 | struct ulp_mem_io *req; | |
e27d6169 | 1262 | struct ulptx_idata *idata; |
7b36b6e0 | 1263 | struct cxgbi_pagepod *ppod; |
e27d6169 | 1264 | unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit; |
1265 | unsigned int dlen = PPOD_SIZE * npods; | |
1266 | unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + | |
1267 | sizeof(struct ulptx_idata) + dlen, 16); | |
7b36b6e0 | 1268 | unsigned int i; |
1269 | ||
e27d6169 | 1270 | skb = alloc_wr(wr_len, 0, GFP_ATOMIC); |
7b36b6e0 | 1271 | if (!skb) { |
1272 | pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n", | |
1273 | cdev, idx, npods); | |
1274 | return -ENOMEM; | |
1275 | } | |
1276 | req = (struct ulp_mem_io *)skb->head; | |
1277 | set_queue(skb, CPL_PRIORITY_CONTROL, NULL); | |
1278 | ||
e27d6169 | 1279 | ulp_mem_io_set_hdr(req, wr_len, dlen, pm_addr); |
1280 | idata = (struct ulptx_idata *)(req + 1); | |
1281 | ppod = (struct cxgbi_pagepod *)(idata + 1); | |
7b36b6e0 | 1282 | |
1283 | for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) { | |
1284 | if (!hdr && !gl) | |
1285 | cxgbi_ddp_ppod_clear(ppod); | |
1286 | else | |
1287 | cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx); | |
1288 | } | |
1289 | ||
1290 | cxgb4_ofld_send(cdev->ports[port_id], skb); | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, | |
1295 | unsigned int idx, unsigned int npods, | |
1296 | struct cxgbi_gather_list *gl) | |
1297 | { | |
1298 | unsigned int i, cnt; | |
1299 | int err = 0; | |
1300 | ||
1301 | for (i = 0; i < npods; i += cnt, idx += cnt) { | |
1302 | cnt = npods - i; | |
e27d6169 | 1303 | if (cnt > ULPMEM_IDATA_MAX_NPPODS) |
1304 | cnt = ULPMEM_IDATA_MAX_NPPODS; | |
1305 | err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr, | |
7b36b6e0 | 1306 | idx, cnt, gl, 4 * i); |
1307 | if (err < 0) | |
1308 | break; | |
1309 | } | |
1310 | return err; | |
1311 | } | |
1312 | ||
1313 | static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, | |
1314 | unsigned int idx, unsigned int npods) | |
1315 | { | |
1316 | unsigned int i, cnt; | |
1317 | int err; | |
1318 | ||
1319 | for (i = 0; i < npods; i += cnt, idx += cnt) { | |
1320 | cnt = npods - i; | |
e27d6169 | 1321 | if (cnt > ULPMEM_IDATA_MAX_NPPODS) |
1322 | cnt = ULPMEM_IDATA_MAX_NPPODS; | |
1323 | err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL, | |
7b36b6e0 | 1324 | idx, cnt, NULL, 0); |
1325 | if (err < 0) | |
1326 | break; | |
1327 | } | |
1328 | } | |
1329 | ||
1330 | static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, | |
1331 | int pg_idx, bool reply) | |
1332 | { | |
1333 | struct sk_buff *skb; | |
1334 | struct cpl_set_tcb_field *req; | |
7b36b6e0 | 1335 | |
e27d6169 | 1336 | if (!pg_idx || pg_idx >= DDP_PGIDX_MAX) |
7b36b6e0 | 1337 | return 0; |
1338 | ||
24d3f95a | 1339 | skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); |
7b36b6e0 | 1340 | if (!skb) |
1341 | return -ENOMEM; | |
1342 | ||
e27d6169 | 1343 | /* set up ulp page size */ |
7b36b6e0 | 1344 | req = (struct cpl_set_tcb_field *)skb->head; |
1345 | INIT_TP_WR(req, csk->tid); | |
1346 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid)); | |
1347 | req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); | |
e27d6169 | 1348 | req->word_cookie = htons(0); |
1349 | req->mask = cpu_to_be64(0x3 << 8); | |
1350 | req->val = cpu_to_be64(pg_idx << 8); | |
7b36b6e0 | 1351 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); |
1352 | ||
1353 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
1354 | "csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx); | |
1355 | ||
1356 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); | |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, | |
1361 | int hcrc, int dcrc, int reply) | |
1362 | { | |
1363 | struct sk_buff *skb; | |
1364 | struct cpl_set_tcb_field *req; | |
7b36b6e0 | 1365 | |
e27d6169 | 1366 | if (!hcrc && !dcrc) |
1367 | return 0; | |
7b36b6e0 | 1368 | |
24d3f95a | 1369 | skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL); |
7b36b6e0 | 1370 | if (!skb) |
1371 | return -ENOMEM; | |
1372 | ||
1373 | csk->hcrc_len = (hcrc ? 4 : 0); | |
1374 | csk->dcrc_len = (dcrc ? 4 : 0); | |
e27d6169 | 1375 | /* set up ulp submode */ |
7b36b6e0 | 1376 | req = (struct cpl_set_tcb_field *)skb->head; |
1377 | INIT_TP_WR(req, tid); | |
1378 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
1379 | req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid)); | |
e27d6169 | 1380 | req->word_cookie = htons(0); |
1381 | req->mask = cpu_to_be64(0x3 << 4); | |
1382 | req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) | | |
1383 | (dcrc ? ULP_CRC_DATA : 0)) << 4); | |
7b36b6e0 | 1384 | set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id); |
1385 | ||
1386 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, | |
1387 | "csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc); | |
1388 | ||
1389 | cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb); | |
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | static int cxgb4i_ddp_init(struct cxgbi_device *cdev) | |
1394 | { | |
1395 | struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); | |
1396 | struct cxgbi_ddp_info *ddp = cdev->ddp; | |
1397 | unsigned int tagmask, pgsz_factor[4]; | |
1398 | int err; | |
1399 | ||
1400 | if (ddp) { | |
1401 | kref_get(&ddp->refcnt); | |
1402 | pr_warn("cdev 0x%p, ddp 0x%p already set up.\n", | |
1403 | cdev, cdev->ddp); | |
1404 | return -EALREADY; | |
1405 | } | |
1406 | ||
1407 | err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start, | |
1408 | lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1, | |
1409 | lldi->iscsi_iolen, lldi->iscsi_iolen); | |
1410 | if (err < 0) | |
1411 | return err; | |
1412 | ||
1413 | ddp = cdev->ddp; | |
1414 | ||
1415 | tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; | |
1416 | cxgbi_ddp_page_size_factor(pgsz_factor); | |
1417 | cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor); | |
1418 | ||
7b36b6e0 | 1419 | cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; |
1420 | cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; | |
1421 | cdev->csk_ddp_set = ddp_set_map; | |
1422 | cdev->csk_ddp_clear = ddp_clear_map; | |
1423 | ||
1424 | pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n", | |
1425 | cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits, | |
1426 | cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask); | |
1427 | pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " | |
1428 | " %u/%u.\n", | |
1429 | cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, | |
1430 | ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen, | |
1431 | ddp->max_rxsz, lldi->iscsi_iolen); | |
1432 | pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n", | |
1433 | cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size, | |
1434 | ddp->max_rxsz); | |
1435 | return 0; | |
1436 | } | |
1437 | ||
1438 | static void *t4_uld_add(const struct cxgb4_lld_info *lldi) | |
1439 | { | |
1440 | struct cxgbi_device *cdev; | |
1441 | struct port_info *pi; | |
1442 | int i, rc; | |
1443 | ||
1444 | cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports); | |
1445 | if (!cdev) { | |
1446 | pr_info("t4 device 0x%p, register failed.\n", lldi); | |
1447 | return NULL; | |
1448 | } | |
1449 | pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n", | |
1450 | cdev, lldi->adapter_type, lldi->nports, | |
1451 | lldi->ports[0]->name, lldi->nchan, lldi->ntxq, | |
1452 | lldi->nrxq, lldi->wr_cred); | |
1453 | for (i = 0; i < lldi->nrxq; i++) | |
1454 | log_debug(1 << CXGBI_DBG_DEV, | |
1455 | "t4 0x%p, rxq id #%d: %u.\n", | |
1456 | cdev, i, lldi->rxq_ids[i]); | |
1457 | ||
1458 | memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi)); | |
1459 | cdev->flags = CXGBI_FLAG_DEV_T4; | |
1460 | cdev->pdev = lldi->pdev; | |
1461 | cdev->ports = lldi->ports; | |
1462 | cdev->nports = lldi->nports; | |
1463 | cdev->mtus = lldi->mtus; | |
1464 | cdev->nmtus = NMTUS; | |
1465 | cdev->snd_win = cxgb4i_snd_win; | |
1466 | cdev->rcv_win = cxgb4i_rcv_win; | |
1467 | cdev->rx_credit_thres = cxgb4i_rx_credit_thres; | |
1468 | cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN; | |
1469 | cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr); | |
1470 | cdev->itp = &cxgb4i_iscsi_transport; | |
1471 | ||
e27d6169 | 1472 | cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8; |
1473 | pr_info("cdev 0x%p,%s, pfvf %u.\n", | |
1474 | cdev, lldi->ports[0]->name, cdev->pfvf); | |
1475 | ||
7b36b6e0 | 1476 | rc = cxgb4i_ddp_init(cdev); |
1477 | if (rc) { | |
1478 | pr_info("t4 0x%p ddp init failed.\n", cdev); | |
1479 | goto err_out; | |
1480 | } | |
1481 | rc = cxgb4i_ofld_init(cdev); | |
1482 | if (rc) { | |
1483 | pr_info("t4 0x%p ofld init failed.\n", cdev); | |
1484 | goto err_out; | |
1485 | } | |
1486 | ||
1487 | rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN, | |
1488 | &cxgb4i_host_template, cxgb4i_stt); | |
1489 | if (rc) | |
1490 | goto err_out; | |
1491 | ||
1492 | for (i = 0; i < cdev->nports; i++) { | |
1493 | pi = netdev_priv(lldi->ports[i]); | |
1494 | cdev->hbas[i]->port_id = pi->port_id; | |
1495 | } | |
1496 | return cdev; | |
1497 | ||
1498 | err_out: | |
1499 | cxgbi_device_unregister(cdev); | |
1500 | return ERR_PTR(-ENOMEM); | |
1501 | } | |
1502 | ||
1503 | #define RX_PULL_LEN 128 | |
1504 | static int t4_uld_rx_handler(void *handle, const __be64 *rsp, | |
1505 | const struct pkt_gl *pgl) | |
1506 | { | |
1507 | const struct cpl_act_establish *rpl; | |
1508 | struct sk_buff *skb; | |
1509 | unsigned int opc; | |
1510 | struct cxgbi_device *cdev = handle; | |
1511 | ||
1512 | if (pgl == NULL) { | |
1513 | unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; | |
1514 | ||
24d3f95a | 1515 | skb = alloc_wr(len, 0, GFP_ATOMIC); |
7b36b6e0 | 1516 | if (!skb) |
1517 | goto nomem; | |
1518 | skb_copy_to_linear_data(skb, &rsp[1], len); | |
1519 | } else { | |
1520 | if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) { | |
1521 | pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", | |
1522 | pgl->va, be64_to_cpu(*rsp), | |
1523 | be64_to_cpu(*(u64 *)pgl->va), | |
1524 | pgl->tot_len); | |
1525 | return 0; | |
1526 | } | |
1527 | skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN); | |
1528 | if (unlikely(!skb)) | |
1529 | goto nomem; | |
1530 | } | |
1531 | ||
1532 | rpl = (struct cpl_act_establish *)skb->data; | |
1533 | opc = rpl->ot.opcode; | |
1534 | log_debug(1 << CXGBI_DBG_TOE, | |
1535 | "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", | |
1536 | cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb); | |
1537 | if (cxgb4i_cplhandlers[opc]) | |
1538 | cxgb4i_cplhandlers[opc](cdev, skb); | |
1539 | else { | |
1540 | pr_err("No handler for opcode 0x%x.\n", opc); | |
1541 | __kfree_skb(skb); | |
1542 | } | |
1543 | return 0; | |
1544 | nomem: | |
1545 | log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n"); | |
1546 | return 1; | |
1547 | } | |
1548 | ||
1549 | static int t4_uld_state_change(void *handle, enum cxgb4_state state) | |
1550 | { | |
1551 | struct cxgbi_device *cdev = handle; | |
1552 | ||
1553 | switch (state) { | |
1554 | case CXGB4_STATE_UP: | |
1555 | pr_info("cdev 0x%p, UP.\n", cdev); | |
1556 | /* re-initialize */ | |
1557 | break; | |
1558 | case CXGB4_STATE_START_RECOVERY: | |
1559 | pr_info("cdev 0x%p, RECOVERY.\n", cdev); | |
1560 | /* close all connections */ | |
1561 | break; | |
1562 | case CXGB4_STATE_DOWN: | |
1563 | pr_info("cdev 0x%p, DOWN.\n", cdev); | |
1564 | break; | |
1565 | case CXGB4_STATE_DETACH: | |
1566 | pr_info("cdev 0x%p, DETACH.\n", cdev); | |
1567 | break; | |
1568 | default: | |
1569 | pr_info("cdev 0x%p, unknown state %d.\n", cdev, state); | |
1570 | break; | |
1571 | } | |
1572 | return 0; | |
1573 | } | |
1574 | ||
1575 | static int __init cxgb4i_init_module(void) | |
1576 | { | |
1577 | int rc; | |
1578 | ||
1579 | printk(KERN_INFO "%s", version); | |
1580 | ||
1581 | rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt); | |
1582 | if (rc < 0) | |
1583 | return rc; | |
1584 | cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info); | |
1585 | return 0; | |
1586 | } | |
1587 | ||
1588 | static void __exit cxgb4i_exit_module(void) | |
1589 | { | |
1590 | cxgb4_unregister_uld(CXGB4_ULD_ISCSI); | |
1591 | cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4); | |
1592 | cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt); | |
1593 | } | |
1594 | ||
1595 | module_init(cxgb4i_init_module); | |
1596 | module_exit(cxgb4i_exit_module); |