kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management |
| 3 | * |
| 4 | * Copyright (C) 2003-2008 Chelsio Communications. All rights reserved. |
| 5 | * |
| 6 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 7 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 8 | * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this |
| 9 | * release for licensing terms and conditions. |
| 10 | * |
| 11 | * Written by: Dimitris Michailidis (dm@chelsio.com) |
| 12 | * Karen Xie (kxie@chelsio.com) |
| 13 | */ |
| 14 | |
| 15 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
| 16 | |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 17 | #include <linux/module.h> |
| 18 | #include <linux/moduleparam.h> |
| 19 | #include <scsi/scsi_host.h> |
| 20 | |
| 21 | #include "common.h" |
| 22 | #include "t3_cpl.h" |
| 23 | #include "t3cdev.h" |
| 24 | #include "cxgb3_defs.h" |
| 25 | #include "cxgb3_ctl_defs.h" |
| 26 | #include "cxgb3_offload.h" |
| 27 | #include "firmware_exports.h" |
| 28 | #include "cxgb3i.h" |
| 29 | |
| 30 | static unsigned int dbg_level; |
| 31 | #include "../libcxgbi.h" |
| 32 | |
| 33 | #define DRV_MODULE_NAME "cxgb3i" |
| 34 | #define DRV_MODULE_DESC "Chelsio T3 iSCSI Driver" |
| 35 | #define DRV_MODULE_VERSION "2.0.0" |
| 36 | #define DRV_MODULE_RELDATE "Jun. 2010" |
| 37 | |
| 38 | static char version[] = |
| 39 | DRV_MODULE_DESC " " DRV_MODULE_NAME |
| 40 | " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
| 41 | |
| 42 | MODULE_AUTHOR("Chelsio Communications, Inc."); |
| 43 | MODULE_DESCRIPTION(DRV_MODULE_DESC); |
| 44 | MODULE_VERSION(DRV_MODULE_VERSION); |
| 45 | MODULE_LICENSE("GPL"); |
| 46 | |
| 47 | module_param(dbg_level, uint, 0644); |
| 48 | MODULE_PARM_DESC(dbg_level, "debug flag (default=0)"); |
| 49 | |
| 50 | static int cxgb3i_rcv_win = 256 * 1024; |
| 51 | module_param(cxgb3i_rcv_win, int, 0644); |
| 52 | MODULE_PARM_DESC(cxgb3i_rcv_win, "TCP receive window in bytes (default=256KB)"); |
| 53 | |
| 54 | static int cxgb3i_snd_win = 128 * 1024; |
| 55 | module_param(cxgb3i_snd_win, int, 0644); |
| 56 | MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)"); |
| 57 | |
| 58 | static int cxgb3i_rx_credit_thres = 10 * 1024; |
| 59 | module_param(cxgb3i_rx_credit_thres, int, 0644); |
| 60 | MODULE_PARM_DESC(rx_credit_thres, |
| 61 | "RX credits return threshold in bytes (default=10KB)"); |
| 62 | |
| 63 | static unsigned int cxgb3i_max_connect = 8 * 1024; |
| 64 | module_param(cxgb3i_max_connect, uint, 0644); |
| 65 | MODULE_PARM_DESC(cxgb3i_max_connect, "Max. # of connections (default=8092)"); |
| 66 | |
| 67 | static unsigned int cxgb3i_sport_base = 20000; |
| 68 | module_param(cxgb3i_sport_base, uint, 0644); |
| 69 | MODULE_PARM_DESC(cxgb3i_sport_base, "starting port number (default=20000)"); |
| 70 | |
| 71 | static void cxgb3i_dev_open(struct t3cdev *); |
| 72 | static void cxgb3i_dev_close(struct t3cdev *); |
| 73 | static void cxgb3i_dev_event_handler(struct t3cdev *, u32, u32); |
| 74 | |
| 75 | static struct cxgb3_client t3_client = { |
| 76 | .name = DRV_MODULE_NAME, |
| 77 | .handlers = cxgb3i_cpl_handlers, |
| 78 | .add = cxgb3i_dev_open, |
| 79 | .remove = cxgb3i_dev_close, |
| 80 | .event_handler = cxgb3i_dev_event_handler, |
| 81 | }; |
| 82 | |
| 83 | static struct scsi_host_template cxgb3i_host_template = { |
| 84 | .module = THIS_MODULE, |
| 85 | .name = DRV_MODULE_NAME, |
| 86 | .proc_name = DRV_MODULE_NAME, |
| 87 | .can_queue = CXGB3I_SCSI_HOST_QDEPTH, |
| 88 | .queuecommand = iscsi_queuecommand, |
| 89 | .change_queue_depth = iscsi_change_queue_depth, |
| 90 | .sg_tablesize = SG_ALL, |
| 91 | .max_sectors = 0xFFFF, |
| 92 | .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, |
| 93 | .eh_abort_handler = iscsi_eh_abort, |
| 94 | .eh_device_reset_handler = iscsi_eh_device_reset, |
| 95 | .eh_target_reset_handler = iscsi_eh_recover_target, |
| 96 | .target_alloc = iscsi_target_alloc, |
| 97 | .use_clustering = DISABLE_CLUSTERING, |
| 98 | .this_id = -1, |
| 99 | }; |
| 100 | |
| 101 | static struct iscsi_transport cxgb3i_iscsi_transport = { |
| 102 | .owner = THIS_MODULE, |
| 103 | .name = DRV_MODULE_NAME, |
| 104 | /* owner and name should be set already */ |
| 105 | .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
| 106 | | CAP_DATADGST | CAP_DIGEST_OFFLOAD | |
Mike Christie | fdafd4d | 2011-02-16 15:04:32 -0600 | [diff] [blame] | 107 | CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO, |
Mike Christie | 3128c6c | 2011-07-25 13:48:42 -0500 | [diff] [blame] | 108 | .attr_is_visible = cxgbi_attr_is_visible, |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 109 | .get_host_param = cxgbi_get_host_param, |
| 110 | .set_host_param = cxgbi_set_host_param, |
| 111 | /* session management */ |
| 112 | .create_session = cxgbi_create_session, |
| 113 | .destroy_session = cxgbi_destroy_session, |
| 114 | .get_session_param = iscsi_session_get_param, |
| 115 | /* connection management */ |
| 116 | .create_conn = cxgbi_create_conn, |
| 117 | .bind_conn = cxgbi_bind_conn, |
| 118 | .destroy_conn = iscsi_tcp_conn_teardown, |
| 119 | .start_conn = iscsi_conn_start, |
| 120 | .stop_conn = iscsi_conn_stop, |
Mike Christie | c71b9b6 | 2011-02-16 15:04:38 -0600 | [diff] [blame] | 121 | .get_conn_param = iscsi_conn_get_param, |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 122 | .set_param = cxgbi_set_conn_param, |
| 123 | .get_stats = cxgbi_get_conn_stats, |
| 124 | /* pdu xmit req from user space */ |
| 125 | .send_pdu = iscsi_conn_send_pdu, |
| 126 | /* task */ |
| 127 | .init_task = iscsi_tcp_task_init, |
| 128 | .xmit_task = iscsi_tcp_task_xmit, |
| 129 | .cleanup_task = cxgbi_cleanup_task, |
| 130 | /* pdu */ |
| 131 | .alloc_pdu = cxgbi_conn_alloc_pdu, |
| 132 | .init_pdu = cxgbi_conn_init_pdu, |
| 133 | .xmit_pdu = cxgbi_conn_xmit_pdu, |
| 134 | .parse_pdu_itt = cxgbi_parse_pdu_itt, |
| 135 | /* TCP connect/disconnect */ |
Mike Christie | c71b9b6 | 2011-02-16 15:04:38 -0600 | [diff] [blame] | 136 | .get_ep_param = cxgbi_get_ep_param, |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 137 | .ep_connect = cxgbi_ep_connect, |
| 138 | .ep_poll = cxgbi_ep_poll, |
| 139 | .ep_disconnect = cxgbi_ep_disconnect, |
| 140 | /* Error recovery timeout call */ |
| 141 | .session_recovery_timedout = iscsi_session_recovery_timedout, |
| 142 | }; |
| 143 | |
| 144 | static struct scsi_transport_template *cxgb3i_stt; |
| 145 | |
| 146 | /* |
| 147 | * CPL (Chelsio Protocol Language) defines a message passing interface between |
| 148 | * the host driver and Chelsio asic. |
| 149 | * The section below implments CPLs that related to iscsi tcp connection |
| 150 | * open/close/abort and data send/receive. |
| 151 | */ |
| 152 | |
| 153 | static int push_tx_frames(struct cxgbi_sock *csk, int req_completion); |
| 154 | |
| 155 | static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, |
| 156 | const struct l2t_entry *e) |
| 157 | { |
| 158 | unsigned int wscale = cxgbi_sock_compute_wscale(cxgb3i_rcv_win); |
| 159 | struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head; |
| 160 | |
| 161 | skb->priority = CPL_PRIORITY_SETUP; |
| 162 | |
| 163 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| 164 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, csk->atid)); |
| 165 | req->local_port = csk->saddr.sin_port; |
| 166 | req->peer_port = csk->daddr.sin_port; |
| 167 | req->local_ip = csk->saddr.sin_addr.s_addr; |
| 168 | req->peer_ip = csk->daddr.sin_addr.s_addr; |
| 169 | |
| 170 | req->opt0h = htonl(V_KEEP_ALIVE(1) | F_TCAM_BYPASS | |
| 171 | V_WND_SCALE(wscale) | V_MSS_IDX(csk->mss_idx) | |
| 172 | V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx)); |
| 173 | req->opt0l = htonl(V_ULP_MODE(ULP2_MODE_ISCSI) | |
| 174 | V_RCV_BUFSIZ(cxgb3i_rcv_win>>10)); |
| 175 | |
| 176 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 177 | "csk 0x%p,%u,0x%lx,%u, %pI4:%u-%pI4:%u, %u,%u,%u.\n", |
| 178 | csk, csk->state, csk->flags, csk->atid, |
| 179 | &req->local_ip, ntohs(req->local_port), |
| 180 | &req->peer_ip, ntohs(req->peer_port), |
| 181 | csk->mss_idx, e->idx, e->smt_idx); |
| 182 | |
| 183 | l2t_send(csk->cdev->lldev, skb, csk->l2t); |
| 184 | } |
| 185 | |
| 186 | static inline void act_open_arp_failure(struct t3cdev *dev, struct sk_buff *skb) |
| 187 | { |
| 188 | cxgbi_sock_act_open_req_arp_failure(NULL, skb); |
| 189 | } |
| 190 | |
| 191 | /* |
| 192 | * CPL connection close request: host -> |
| 193 | * |
| 194 | * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to |
| 195 | * the write queue (i.e., after any unsent txt data). |
| 196 | */ |
| 197 | static void send_close_req(struct cxgbi_sock *csk) |
| 198 | { |
| 199 | struct sk_buff *skb = csk->cpl_close; |
| 200 | struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; |
| 201 | unsigned int tid = csk->tid; |
| 202 | |
| 203 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 204 | "csk 0x%p,%u,0x%lx,%u.\n", |
| 205 | csk, csk->state, csk->flags, csk->tid); |
| 206 | |
| 207 | csk->cpl_close = NULL; |
| 208 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); |
| 209 | req->wr.wr_lo = htonl(V_WR_TID(tid)); |
| 210 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); |
| 211 | req->rsvd = htonl(csk->write_seq); |
| 212 | |
| 213 | cxgbi_sock_skb_entail(csk, skb); |
| 214 | if (csk->state >= CTP_ESTABLISHED) |
| 215 | push_tx_frames(csk, 1); |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * CPL connection abort request: host -> |
| 220 | * |
| 221 | * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs |
| 222 | * for the same connection and also that we do not try to send a message |
| 223 | * after the connection has closed. |
| 224 | */ |
| 225 | static void abort_arp_failure(struct t3cdev *tdev, struct sk_buff *skb) |
| 226 | { |
| 227 | struct cpl_abort_req *req = cplhdr(skb); |
| 228 | |
| 229 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 230 | "t3dev 0x%p, tid %u, skb 0x%p.\n", |
| 231 | tdev, GET_TID(req), skb); |
| 232 | req->cmd = CPL_ABORT_NO_RST; |
| 233 | cxgb3_ofld_send(tdev, skb); |
| 234 | } |
| 235 | |
| 236 | static void send_abort_req(struct cxgbi_sock *csk) |
| 237 | { |
| 238 | struct sk_buff *skb = csk->cpl_abort_req; |
| 239 | struct cpl_abort_req *req; |
| 240 | |
| 241 | if (unlikely(csk->state == CTP_ABORTING || !skb)) |
| 242 | return; |
| 243 | cxgbi_sock_set_state(csk, CTP_ABORTING); |
| 244 | cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); |
| 245 | /* Purge the send queue so we don't send anything after an abort. */ |
| 246 | cxgbi_sock_purge_write_queue(csk); |
| 247 | |
| 248 | csk->cpl_abort_req = NULL; |
| 249 | req = (struct cpl_abort_req *)skb->head; |
| 250 | skb->priority = CPL_PRIORITY_DATA; |
| 251 | set_arp_failure_handler(skb, abort_arp_failure); |
| 252 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); |
| 253 | req->wr.wr_lo = htonl(V_WR_TID(csk->tid)); |
| 254 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); |
| 255 | req->rsvd0 = htonl(csk->snd_nxt); |
| 256 | req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); |
| 257 | req->cmd = CPL_ABORT_SEND_RST; |
| 258 | |
| 259 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 260 | "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", |
| 261 | csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, |
| 262 | req->rsvd1); |
| 263 | |
| 264 | l2t_send(csk->cdev->lldev, skb, csk->l2t); |
| 265 | } |
| 266 | |
| 267 | /* |
| 268 | * CPL connection abort reply: host -> |
| 269 | * |
| 270 | * Send an ABORT_RPL message in response of the ABORT_REQ received. |
| 271 | */ |
| 272 | static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) |
| 273 | { |
| 274 | struct sk_buff *skb = csk->cpl_abort_rpl; |
| 275 | struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; |
| 276 | |
| 277 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 278 | "csk 0x%p,%u,0x%lx,%u, status %d.\n", |
| 279 | csk, csk->state, csk->flags, csk->tid, rst_status); |
| 280 | |
| 281 | csk->cpl_abort_rpl = NULL; |
| 282 | skb->priority = CPL_PRIORITY_DATA; |
| 283 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); |
| 284 | rpl->wr.wr_lo = htonl(V_WR_TID(csk->tid)); |
| 285 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); |
| 286 | rpl->cmd = rst_status; |
| 287 | cxgb3_ofld_send(csk->cdev->lldev, skb); |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * CPL connection rx data ack: host -> |
| 292 | * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of |
| 293 | * credits sent. |
| 294 | */ |
| 295 | static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) |
| 296 | { |
| 297 | struct sk_buff *skb; |
| 298 | struct cpl_rx_data_ack *req; |
| 299 | u32 dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); |
| 300 | |
| 301 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
| 302 | "csk 0x%p,%u,0x%lx,%u, credit %u, dack %u.\n", |
| 303 | csk, csk->state, csk->flags, csk->tid, credits, dack); |
| 304 | |
kxie@chelsio.com | 24d3f95 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 305 | skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC); |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 306 | if (!skb) { |
| 307 | pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits); |
| 308 | return 0; |
| 309 | } |
| 310 | req = (struct cpl_rx_data_ack *)skb->head; |
| 311 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| 312 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid)); |
| 313 | req->credit_dack = htonl(F_RX_DACK_CHANGE | V_RX_DACK_MODE(1) | |
| 314 | V_RX_CREDITS(credits)); |
| 315 | skb->priority = CPL_PRIORITY_ACK; |
| 316 | cxgb3_ofld_send(csk->cdev->lldev, skb); |
| 317 | return credits; |
| 318 | } |
| 319 | |
| 320 | /* |
| 321 | * CPL connection tx data: host -> |
| 322 | * |
| 323 | * Send iscsi PDU via TX_DATA CPL message. Returns the number of |
| 324 | * credits sent. |
| 325 | * Each TX_DATA consumes work request credit (wrs), so we need to keep track of |
| 326 | * how many we've used so far and how many are pending (i.e., yet ack'ed by T3). |
| 327 | */ |
| 328 | |
| 329 | static unsigned int wrlen __read_mostly; |
| 330 | static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly; |
| 331 | |
| 332 | static void init_wr_tab(unsigned int wr_len) |
| 333 | { |
| 334 | int i; |
| 335 | |
| 336 | if (skb_wrs[1]) /* already initialized */ |
| 337 | return; |
| 338 | for (i = 1; i < SKB_WR_LIST_SIZE; i++) { |
| 339 | int sgl_len = (3 * i) / 2 + (i & 1); |
| 340 | |
| 341 | sgl_len += 3; |
| 342 | skb_wrs[i] = (sgl_len <= wr_len |
| 343 | ? 1 : 1 + (sgl_len - 2) / (wr_len - 1)); |
| 344 | } |
| 345 | wrlen = wr_len * 8; |
| 346 | } |
| 347 | |
| 348 | static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, |
| 349 | int len, int req_completion) |
| 350 | { |
| 351 | struct tx_data_wr *req; |
| 352 | struct l2t_entry *l2t = csk->l2t; |
| 353 | |
| 354 | skb_reset_transport_header(skb); |
| 355 | req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req)); |
| 356 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) | |
| 357 | (req_completion ? F_WR_COMPL : 0)); |
| 358 | req->wr_lo = htonl(V_WR_TID(csk->tid)); |
| 359 | /* len includes the length of any HW ULP additions */ |
| 360 | req->len = htonl(len); |
| 361 | /* V_TX_ULP_SUBMODE sets both the mode and submode */ |
| 362 | req->flags = htonl(V_TX_ULP_SUBMODE(cxgbi_skcb_ulp_mode(skb)) | |
| 363 | V_TX_SHOVE((skb_peek(&csk->write_queue) ? 0 : 1))); |
| 364 | req->sndseq = htonl(csk->snd_nxt); |
| 365 | req->param = htonl(V_TX_PORT(l2t->smt_idx)); |
| 366 | |
| 367 | if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { |
| 368 | req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT | |
| 369 | V_TX_CPU_IDX(csk->rss_qid)); |
| 370 | /* sendbuffer is in units of 32KB. */ |
| 371 | req->param |= htonl(V_TX_SNDBUF(cxgb3i_snd_win >> 15)); |
| 372 | cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | /** |
| 377 | * push_tx_frames -- start transmit |
| 378 | * @c3cn: the offloaded connection |
| 379 | * @req_completion: request wr_ack or not |
| 380 | * |
| 381 | * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a |
| 382 | * connection's send queue and sends them on to T3. Must be called with the |
| 383 | * connection's lock held. Returns the amount of send buffer space that was |
| 384 | * freed as a result of sending queued data to T3. |
| 385 | */ |
| 386 | |
| 387 | static void arp_failure_skb_discard(struct t3cdev *dev, struct sk_buff *skb) |
| 388 | { |
| 389 | kfree_skb(skb); |
| 390 | } |
| 391 | |
| 392 | static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) |
| 393 | { |
| 394 | int total_size = 0; |
| 395 | struct sk_buff *skb; |
| 396 | |
| 397 | if (unlikely(csk->state < CTP_ESTABLISHED || |
| 398 | csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { |
| 399 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, |
| 400 | "csk 0x%p,%u,0x%lx,%u, in closing state.\n", |
| 401 | csk, csk->state, csk->flags, csk->tid); |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { |
| 406 | int len = skb->len; /* length before skb_push */ |
| 407 | int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len); |
| 408 | int wrs_needed = skb_wrs[frags]; |
| 409 | |
| 410 | if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen) |
| 411 | wrs_needed = 1; |
| 412 | |
| 413 | WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1); |
| 414 | |
| 415 | if (csk->wr_cred < wrs_needed) { |
| 416 | log_debug(1 << CXGBI_DBG_PDU_TX, |
| 417 | "csk 0x%p, skb len %u/%u, frag %u, wr %d<%u.\n", |
| 418 | csk, skb->len, skb->data_len, frags, |
| 419 | wrs_needed, csk->wr_cred); |
| 420 | break; |
| 421 | } |
| 422 | |
| 423 | __skb_unlink(skb, &csk->write_queue); |
| 424 | skb->priority = CPL_PRIORITY_DATA; |
| 425 | skb->csum = wrs_needed; /* remember this until the WR_ACK */ |
| 426 | csk->wr_cred -= wrs_needed; |
| 427 | csk->wr_una_cred += wrs_needed; |
| 428 | cxgbi_sock_enqueue_wr(csk, skb); |
| 429 | |
| 430 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, |
| 431 | "csk 0x%p, enqueue, skb len %u/%u, frag %u, wr %d, " |
| 432 | "left %u, unack %u.\n", |
| 433 | csk, skb->len, skb->data_len, frags, skb->csum, |
| 434 | csk->wr_cred, csk->wr_una_cred); |
| 435 | |
| 436 | if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { |
| 437 | if ((req_completion && |
| 438 | csk->wr_una_cred == wrs_needed) || |
| 439 | csk->wr_una_cred >= csk->wr_max_cred / 2) { |
| 440 | req_completion = 1; |
| 441 | csk->wr_una_cred = 0; |
| 442 | } |
| 443 | len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); |
| 444 | make_tx_data_wr(csk, skb, len, req_completion); |
| 445 | csk->snd_nxt += len; |
| 446 | cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); |
| 447 | } |
| 448 | total_size += skb->truesize; |
| 449 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX, |
| 450 | "csk 0x%p, tid 0x%x, send skb 0x%p.\n", |
| 451 | csk, csk->tid, skb); |
| 452 | set_arp_failure_handler(skb, arp_failure_skb_discard); |
| 453 | l2t_send(csk->cdev->lldev, skb, csk->l2t); |
| 454 | } |
| 455 | return total_size; |
| 456 | } |
| 457 | |
| 458 | /* |
| 459 | * Process a CPL_ACT_ESTABLISH message: -> host |
| 460 | * Updates connection state from an active establish CPL message. Runs with |
| 461 | * the connection lock held. |
| 462 | */ |
| 463 | |
| 464 | static inline void free_atid(struct cxgbi_sock *csk) |
| 465 | { |
| 466 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { |
| 467 | cxgb3_free_atid(csk->cdev->lldev, csk->atid); |
| 468 | cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); |
| 469 | cxgbi_sock_put(csk); |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | static int do_act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| 474 | { |
| 475 | struct cxgbi_sock *csk = ctx; |
| 476 | struct cpl_act_establish *req = cplhdr(skb); |
| 477 | unsigned int tid = GET_TID(req); |
| 478 | unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); |
| 479 | u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */ |
| 480 | |
| 481 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 482 | "atid 0x%x,tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", |
| 483 | atid, atid, csk, csk->state, csk->flags, rcv_isn); |
| 484 | |
| 485 | cxgbi_sock_get(csk); |
| 486 | cxgbi_sock_set_flag(csk, CTPF_HAS_TID); |
| 487 | csk->tid = tid; |
| 488 | cxgb3_insert_tid(csk->cdev->lldev, &t3_client, csk, tid); |
| 489 | |
| 490 | free_atid(csk); |
| 491 | |
| 492 | csk->rss_qid = G_QNUM(ntohs(skb->csum)); |
| 493 | |
| 494 | spin_lock_bh(&csk->lock); |
| 495 | if (csk->retry_timer.function) { |
| 496 | del_timer(&csk->retry_timer); |
| 497 | csk->retry_timer.function = NULL; |
| 498 | } |
| 499 | |
| 500 | if (unlikely(csk->state != CTP_ACTIVE_OPEN)) |
| 501 | pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", |
| 502 | csk, csk->state, csk->flags, csk->tid); |
| 503 | |
| 504 | csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; |
| 505 | if (cxgb3i_rcv_win > (M_RCV_BUFSIZ << 10)) |
| 506 | csk->rcv_wup -= cxgb3i_rcv_win - (M_RCV_BUFSIZ << 10); |
| 507 | |
| 508 | cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); |
| 509 | |
| 510 | if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) |
| 511 | /* upper layer has requested closing */ |
| 512 | send_abort_req(csk); |
| 513 | else { |
| 514 | if (skb_queue_len(&csk->write_queue)) |
| 515 | push_tx_frames(csk, 1); |
| 516 | cxgbi_conn_tx_open(csk); |
| 517 | } |
| 518 | |
| 519 | spin_unlock_bh(&csk->lock); |
| 520 | __kfree_skb(skb); |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * Process a CPL_ACT_OPEN_RPL message: -> host |
| 526 | * Handle active open failures. |
| 527 | */ |
| 528 | static int act_open_rpl_status_to_errno(int status) |
| 529 | { |
| 530 | switch (status) { |
| 531 | case CPL_ERR_CONN_RESET: |
| 532 | return -ECONNREFUSED; |
| 533 | case CPL_ERR_ARP_MISS: |
| 534 | return -EHOSTUNREACH; |
| 535 | case CPL_ERR_CONN_TIMEDOUT: |
| 536 | return -ETIMEDOUT; |
| 537 | case CPL_ERR_TCAM_FULL: |
| 538 | return -ENOMEM; |
| 539 | case CPL_ERR_CONN_EXIST: |
| 540 | return -EADDRINUSE; |
| 541 | default: |
| 542 | return -EIO; |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | static void act_open_retry_timer(unsigned long data) |
| 547 | { |
| 548 | struct sk_buff *skb; |
| 549 | struct cxgbi_sock *csk = (struct cxgbi_sock *)data; |
| 550 | |
| 551 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 552 | "csk 0x%p,%u,0x%lx,%u.\n", |
| 553 | csk, csk->state, csk->flags, csk->tid); |
| 554 | |
| 555 | cxgbi_sock_get(csk); |
| 556 | spin_lock_bh(&csk->lock); |
kxie@chelsio.com | 24d3f95 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 557 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 558 | if (!skb) |
| 559 | cxgbi_sock_fail_act_open(csk, -ENOMEM); |
| 560 | else { |
| 561 | skb->sk = (struct sock *)csk; |
| 562 | set_arp_failure_handler(skb, act_open_arp_failure); |
| 563 | send_act_open_req(csk, skb, csk->l2t); |
| 564 | } |
| 565 | spin_unlock_bh(&csk->lock); |
| 566 | cxgbi_sock_put(csk); |
| 567 | } |
| 568 | |
| 569 | static int do_act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| 570 | { |
| 571 | struct cxgbi_sock *csk = ctx; |
| 572 | struct cpl_act_open_rpl *rpl = cplhdr(skb); |
| 573 | |
kxie@chelsio.com | 0b3d894 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 574 | pr_info("csk 0x%p,%u,0x%lx,%u, status %u, %pI4:%u-%pI4:%u.\n", |
| 575 | csk, csk->state, csk->flags, csk->atid, rpl->status, |
| 576 | &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), |
| 577 | &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 578 | |
| 579 | if (rpl->status != CPL_ERR_TCAM_FULL && |
| 580 | rpl->status != CPL_ERR_CONN_EXIST && |
| 581 | rpl->status != CPL_ERR_ARP_MISS) |
| 582 | cxgb3_queue_tid_release(tdev, GET_TID(rpl)); |
| 583 | |
| 584 | cxgbi_sock_get(csk); |
| 585 | spin_lock_bh(&csk->lock); |
| 586 | if (rpl->status == CPL_ERR_CONN_EXIST && |
| 587 | csk->retry_timer.function != act_open_retry_timer) { |
| 588 | csk->retry_timer.function = act_open_retry_timer; |
| 589 | mod_timer(&csk->retry_timer, jiffies + HZ / 2); |
| 590 | } else |
| 591 | cxgbi_sock_fail_act_open(csk, |
| 592 | act_open_rpl_status_to_errno(rpl->status)); |
| 593 | |
| 594 | spin_unlock_bh(&csk->lock); |
| 595 | cxgbi_sock_put(csk); |
| 596 | __kfree_skb(skb); |
| 597 | return 0; |
| 598 | } |
| 599 | |
| 600 | /* |
| 601 | * Process PEER_CLOSE CPL messages: -> host |
| 602 | * Handle peer FIN. |
| 603 | */ |
| 604 | static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) |
| 605 | { |
| 606 | struct cxgbi_sock *csk = ctx; |
| 607 | |
| 608 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 609 | "csk 0x%p,%u,0x%lx,%u.\n", |
| 610 | csk, csk->state, csk->flags, csk->tid); |
| 611 | |
| 612 | cxgbi_sock_rcv_peer_close(csk); |
| 613 | __kfree_skb(skb); |
| 614 | return 0; |
| 615 | } |
| 616 | |
| 617 | /* |
| 618 | * Process CLOSE_CONN_RPL CPL message: -> host |
| 619 | * Process a peer ACK to our FIN. |
| 620 | */ |
| 621 | static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb, |
| 622 | void *ctx) |
| 623 | { |
| 624 | struct cxgbi_sock *csk = ctx; |
| 625 | struct cpl_close_con_rpl *rpl = cplhdr(skb); |
| 626 | |
| 627 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 628 | "csk 0x%p,%u,0x%lx,%u, snxt %u.\n", |
| 629 | csk, csk->state, csk->flags, csk->tid, ntohl(rpl->snd_nxt)); |
| 630 | |
| 631 | cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); |
| 632 | __kfree_skb(skb); |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | /* |
| 637 | * Process ABORT_REQ_RSS CPL message: -> host |
| 638 | * Process abort requests. If we are waiting for an ABORT_RPL we ignore this |
| 639 | * request except that we need to reply to it. |
| 640 | */ |
| 641 | |
| 642 | static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, |
| 643 | int *need_rst) |
| 644 | { |
| 645 | switch (abort_reason) { |
| 646 | case CPL_ERR_BAD_SYN: /* fall through */ |
| 647 | case CPL_ERR_CONN_RESET: |
kxie@chelsio.com | 0b3d894 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 648 | return csk->state > CTP_ESTABLISHED ? -EPIPE : -ECONNRESET; |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 649 | case CPL_ERR_XMIT_TIMEDOUT: |
| 650 | case CPL_ERR_PERSIST_TIMEDOUT: |
| 651 | case CPL_ERR_FINWAIT2_TIMEDOUT: |
| 652 | case CPL_ERR_KEEPALIVE_TIMEDOUT: |
| 653 | return -ETIMEDOUT; |
| 654 | default: |
| 655 | return -EIO; |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) |
| 660 | { |
| 661 | const struct cpl_abort_req_rss *req = cplhdr(skb); |
| 662 | struct cxgbi_sock *csk = ctx; |
| 663 | int rst_status = CPL_ABORT_NO_RST; |
| 664 | |
| 665 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 666 | "csk 0x%p,%u,0x%lx,%u.\n", |
| 667 | csk, csk->state, csk->flags, csk->tid); |
| 668 | |
| 669 | if (req->status == CPL_ERR_RTX_NEG_ADVICE || |
| 670 | req->status == CPL_ERR_PERSIST_NEG_ADVICE) { |
| 671 | goto done; |
| 672 | } |
| 673 | |
| 674 | cxgbi_sock_get(csk); |
| 675 | spin_lock_bh(&csk->lock); |
| 676 | |
| 677 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { |
| 678 | cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); |
| 679 | cxgbi_sock_set_state(csk, CTP_ABORTING); |
| 680 | goto out; |
| 681 | } |
| 682 | |
| 683 | cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); |
| 684 | send_abort_rpl(csk, rst_status); |
| 685 | |
| 686 | if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { |
| 687 | csk->err = abort_status_to_errno(csk, req->status, &rst_status); |
| 688 | cxgbi_sock_closed(csk); |
| 689 | } |
| 690 | |
| 691 | out: |
| 692 | spin_unlock_bh(&csk->lock); |
| 693 | cxgbi_sock_put(csk); |
| 694 | done: |
| 695 | __kfree_skb(skb); |
| 696 | return 0; |
| 697 | } |
| 698 | |
| 699 | /* |
| 700 | * Process ABORT_RPL_RSS CPL message: -> host |
| 701 | * Process abort replies. We only process these messages if we anticipate |
| 702 | * them as the coordination between SW and HW in this area is somewhat lacking |
| 703 | * and sometimes we get ABORT_RPLs after we are done with the connection that |
| 704 | * originated the ABORT_REQ. |
| 705 | */ |
| 706 | static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) |
| 707 | { |
| 708 | struct cpl_abort_rpl_rss *rpl = cplhdr(skb); |
| 709 | struct cxgbi_sock *csk = ctx; |
| 710 | |
| 711 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 712 | "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", |
| 713 | rpl->status, csk, csk ? csk->state : 0, |
| 714 | csk ? csk->flags : 0UL); |
| 715 | /* |
| 716 | * Ignore replies to post-close aborts indicating that the abort was |
| 717 | * requested too late. These connections are terminated when we get |
| 718 | * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss |
| 719 | * arrives the TID is either no longer used or it has been recycled. |
| 720 | */ |
| 721 | if (rpl->status == CPL_ERR_ABORT_FAILED) |
| 722 | goto rel_skb; |
| 723 | /* |
| 724 | * Sometimes we've already closed the connection, e.g., a post-close |
| 725 | * abort races with ABORT_REQ_RSS, the latter frees the connection |
| 726 | * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED, |
| 727 | * but FW turns the ABORT_REQ into a regular one and so we get |
| 728 | * ABORT_RPL_RSS with status 0 and no connection. |
| 729 | */ |
| 730 | if (csk) |
| 731 | cxgbi_sock_rcv_abort_rpl(csk); |
| 732 | rel_skb: |
| 733 | __kfree_skb(skb); |
| 734 | return 0; |
| 735 | } |
| 736 | |
| 737 | /* |
| 738 | * Process RX_ISCSI_HDR CPL message: -> host |
| 739 | * Handle received PDUs, the payload could be DDP'ed. If not, the payload |
| 740 | * follow after the bhs. |
| 741 | */ |
| 742 | static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx) |
| 743 | { |
| 744 | struct cxgbi_sock *csk = ctx; |
| 745 | struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb); |
| 746 | struct cpl_iscsi_hdr_norss data_cpl; |
| 747 | struct cpl_rx_data_ddp_norss ddp_cpl; |
| 748 | unsigned int hdr_len, data_len, status; |
| 749 | unsigned int len; |
| 750 | int err; |
| 751 | |
| 752 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
| 753 | "csk 0x%p,%u,0x%lx,%u, skb 0x%p,%u.\n", |
| 754 | csk, csk->state, csk->flags, csk->tid, skb, skb->len); |
| 755 | |
| 756 | spin_lock_bh(&csk->lock); |
| 757 | |
| 758 | if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { |
| 759 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 760 | "csk 0x%p,%u,0x%lx,%u, bad state.\n", |
| 761 | csk, csk->state, csk->flags, csk->tid); |
| 762 | if (csk->state != CTP_ABORTING) |
| 763 | goto abort_conn; |
| 764 | else |
| 765 | goto discard; |
| 766 | } |
| 767 | |
| 768 | cxgbi_skcb_tcp_seq(skb) = ntohl(hdr_cpl->seq); |
| 769 | cxgbi_skcb_flags(skb) = 0; |
| 770 | |
| 771 | skb_reset_transport_header(skb); |
| 772 | __skb_pull(skb, sizeof(struct cpl_iscsi_hdr)); |
| 773 | |
| 774 | len = hdr_len = ntohs(hdr_cpl->len); |
| 775 | /* msg coalesce is off or not enough data received */ |
| 776 | if (skb->len <= hdr_len) { |
| 777 | pr_err("%s: tid %u, CPL_ISCSI_HDR, skb len %u < %u.\n", |
| 778 | csk->cdev->ports[csk->port_id]->name, csk->tid, |
| 779 | skb->len, hdr_len); |
| 780 | goto abort_conn; |
| 781 | } |
| 782 | cxgbi_skcb_set_flag(skb, SKCBF_RX_COALESCED); |
| 783 | |
| 784 | err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl, |
| 785 | sizeof(ddp_cpl)); |
| 786 | if (err < 0) { |
| 787 | pr_err("%s: tid %u, copy cpl_ddp %u-%zu failed %d.\n", |
| 788 | csk->cdev->ports[csk->port_id]->name, csk->tid, |
| 789 | skb->len, sizeof(ddp_cpl), err); |
| 790 | goto abort_conn; |
| 791 | } |
| 792 | |
| 793 | cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS); |
| 794 | cxgbi_skcb_rx_pdulen(skb) = ntohs(ddp_cpl.len); |
| 795 | cxgbi_skcb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc); |
| 796 | status = ntohl(ddp_cpl.ddp_status); |
| 797 | |
| 798 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
| 799 | "csk 0x%p, skb 0x%p,%u, pdulen %u, status 0x%x.\n", |
| 800 | csk, skb, skb->len, cxgbi_skcb_rx_pdulen(skb), status); |
| 801 | |
| 802 | if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) |
| 803 | cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR); |
| 804 | if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) |
| 805 | cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR); |
| 806 | if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) |
| 807 | cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR); |
| 808 | |
| 809 | if (skb->len > (hdr_len + sizeof(ddp_cpl))) { |
| 810 | err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl)); |
| 811 | if (err < 0) { |
| 812 | pr_err("%s: tid %u, cp %zu/%u failed %d.\n", |
| 813 | csk->cdev->ports[csk->port_id]->name, |
| 814 | csk->tid, sizeof(data_cpl), skb->len, err); |
| 815 | goto abort_conn; |
| 816 | } |
| 817 | data_len = ntohs(data_cpl.len); |
| 818 | log_debug(1 << CXGBI_DBG_DDP | 1 << CXGBI_DBG_PDU_RX, |
| 819 | "skb 0x%p, pdu not ddp'ed %u/%u, status 0x%x.\n", |
| 820 | skb, data_len, cxgbi_skcb_rx_pdulen(skb), status); |
| 821 | len += sizeof(data_cpl) + data_len; |
| 822 | } else if (status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) |
| 823 | cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD); |
| 824 | |
| 825 | csk->rcv_nxt = ntohl(ddp_cpl.seq) + cxgbi_skcb_rx_pdulen(skb); |
| 826 | __pskb_trim(skb, len); |
| 827 | __skb_queue_tail(&csk->receive_queue, skb); |
| 828 | cxgbi_conn_pdu_ready(csk); |
| 829 | |
| 830 | spin_unlock_bh(&csk->lock); |
| 831 | return 0; |
| 832 | |
| 833 | abort_conn: |
| 834 | send_abort_req(csk); |
| 835 | discard: |
| 836 | spin_unlock_bh(&csk->lock); |
| 837 | __kfree_skb(skb); |
| 838 | return 0; |
| 839 | } |
| 840 | |
| 841 | /* |
| 842 | * Process TX_DATA_ACK CPL messages: -> host |
| 843 | * Process an acknowledgment of WR completion. Advance snd_una and send the |
| 844 | * next batch of work requests from the write queue. |
| 845 | */ |
| 846 | static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) |
| 847 | { |
| 848 | struct cxgbi_sock *csk = ctx; |
| 849 | struct cpl_wr_ack *hdr = cplhdr(skb); |
| 850 | |
| 851 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, |
| 852 | "csk 0x%p,%u,0x%lx,%u, cr %u.\n", |
| 853 | csk, csk->state, csk->flags, csk->tid, ntohs(hdr->credits)); |
| 854 | |
| 855 | cxgbi_sock_rcv_wr_ack(csk, ntohs(hdr->credits), ntohl(hdr->snd_una), 1); |
| 856 | __kfree_skb(skb); |
| 857 | return 0; |
| 858 | } |
| 859 | |
| 860 | /* |
| 861 | * for each connection, pre-allocate skbs needed for close/abort requests. So |
| 862 | * that we can service the request right away. |
| 863 | */ |
| 864 | static int alloc_cpls(struct cxgbi_sock *csk) |
| 865 | { |
kxie@chelsio.com | 24d3f95 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 866 | csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req), 0, |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 867 | GFP_KERNEL); |
| 868 | if (!csk->cpl_close) |
| 869 | return -ENOMEM; |
kxie@chelsio.com | 24d3f95 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 870 | csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req), 0, |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 871 | GFP_KERNEL); |
| 872 | if (!csk->cpl_abort_req) |
| 873 | goto free_cpl_skbs; |
| 874 | |
kxie@chelsio.com | 24d3f95 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 875 | csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl), 0, |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 876 | GFP_KERNEL); |
| 877 | if (!csk->cpl_abort_rpl) |
| 878 | goto free_cpl_skbs; |
| 879 | |
| 880 | return 0; |
| 881 | |
| 882 | free_cpl_skbs: |
| 883 | cxgbi_sock_free_cpl_skbs(csk); |
| 884 | return -ENOMEM; |
| 885 | } |
| 886 | |
| 887 | /** |
| 888 | * release_offload_resources - release offload resource |
| 889 | * @c3cn: the offloaded iscsi tcp connection. |
| 890 | * Release resources held by an offload connection (TID, L2T entry, etc.) |
| 891 | */ |
| 892 | static void l2t_put(struct cxgbi_sock *csk) |
| 893 | { |
| 894 | struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; |
| 895 | |
| 896 | if (csk->l2t) { |
Neil Horman | e48f129 | 2011-09-06 13:59:13 -0400 | [diff] [blame] | 897 | l2t_release(t3dev, csk->l2t); |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 898 | csk->l2t = NULL; |
| 899 | cxgbi_sock_put(csk); |
| 900 | } |
| 901 | } |
| 902 | |
| 903 | static void release_offload_resources(struct cxgbi_sock *csk) |
| 904 | { |
| 905 | struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; |
| 906 | |
| 907 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 908 | "csk 0x%p,%u,0x%lx,%u.\n", |
| 909 | csk, csk->state, csk->flags, csk->tid); |
| 910 | |
| 911 | csk->rss_qid = 0; |
| 912 | cxgbi_sock_free_cpl_skbs(csk); |
| 913 | |
| 914 | if (csk->wr_cred != csk->wr_max_cred) { |
| 915 | cxgbi_sock_purge_wr_queue(csk); |
| 916 | cxgbi_sock_reset_wr_list(csk); |
| 917 | } |
| 918 | l2t_put(csk); |
| 919 | if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) |
| 920 | free_atid(csk); |
| 921 | else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { |
| 922 | cxgb3_remove_tid(t3dev, (void *)csk, csk->tid); |
| 923 | cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); |
| 924 | cxgbi_sock_put(csk); |
| 925 | } |
| 926 | csk->dst = NULL; |
| 927 | csk->cdev = NULL; |
| 928 | } |
| 929 | |
kxie@chelsio.com | 0b3d894 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 930 | static void update_address(struct cxgbi_hba *chba) |
| 931 | { |
| 932 | if (chba->ipv4addr) { |
| 933 | if (chba->vdev && |
| 934 | chba->ipv4addr != cxgb3i_get_private_ipv4addr(chba->vdev)) { |
| 935 | cxgb3i_set_private_ipv4addr(chba->vdev, chba->ipv4addr); |
| 936 | cxgb3i_set_private_ipv4addr(chba->ndev, 0); |
| 937 | pr_info("%s set %pI4.\n", |
| 938 | chba->vdev->name, &chba->ipv4addr); |
| 939 | } else if (chba->ipv4addr != |
| 940 | cxgb3i_get_private_ipv4addr(chba->ndev)) { |
| 941 | cxgb3i_set_private_ipv4addr(chba->ndev, chba->ipv4addr); |
| 942 | pr_info("%s set %pI4.\n", |
| 943 | chba->ndev->name, &chba->ipv4addr); |
| 944 | } |
| 945 | } else if (cxgb3i_get_private_ipv4addr(chba->ndev)) { |
| 946 | if (chba->vdev) |
| 947 | cxgb3i_set_private_ipv4addr(chba->vdev, 0); |
| 948 | cxgb3i_set_private_ipv4addr(chba->ndev, 0); |
| 949 | } |
| 950 | } |
| 951 | |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 952 | static int init_act_open(struct cxgbi_sock *csk) |
| 953 | { |
| 954 | struct dst_entry *dst = csk->dst; |
| 955 | struct cxgbi_device *cdev = csk->cdev; |
| 956 | struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; |
| 957 | struct net_device *ndev = cdev->ports[csk->port_id]; |
kxie@chelsio.com | 0b3d894 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 958 | struct cxgbi_hba *chba = cdev->hbas[csk->port_id]; |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 959 | struct sk_buff *skb = NULL; |
| 960 | |
| 961 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 962 | "csk 0x%p,%u,0x%lx.\n", csk, csk->state, csk->flags); |
| 963 | |
kxie@chelsio.com | 0b3d894 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 964 | update_address(chba); |
| 965 | if (chba->ipv4addr) |
| 966 | csk->saddr.sin_addr.s_addr = chba->ipv4addr; |
| 967 | |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 968 | csk->rss_qid = 0; |
David Miller | a475712 | 2011-12-02 16:52:18 +0000 | [diff] [blame] | 969 | csk->l2t = t3_l2t_get(t3dev, dst, ndev); |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 970 | if (!csk->l2t) { |
| 971 | pr_err("NO l2t available.\n"); |
| 972 | return -EINVAL; |
| 973 | } |
| 974 | cxgbi_sock_get(csk); |
| 975 | |
| 976 | csk->atid = cxgb3_alloc_atid(t3dev, &t3_client, csk); |
| 977 | if (csk->atid < 0) { |
| 978 | pr_err("NO atid available.\n"); |
| 979 | goto rel_resource; |
| 980 | } |
| 981 | cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); |
| 982 | cxgbi_sock_get(csk); |
| 983 | |
kxie@chelsio.com | 24d3f95 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 984 | skb = alloc_wr(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 985 | if (!skb) |
| 986 | goto rel_resource; |
| 987 | skb->sk = (struct sock *)csk; |
| 988 | set_arp_failure_handler(skb, act_open_arp_failure); |
| 989 | |
| 990 | csk->wr_max_cred = csk->wr_cred = T3C_DATA(t3dev)->max_wrs - 1; |
| 991 | csk->wr_una_cred = 0; |
| 992 | csk->mss_idx = cxgbi_sock_select_mss(csk, dst_mtu(dst)); |
| 993 | cxgbi_sock_reset_wr_list(csk); |
| 994 | csk->err = 0; |
| 995 | |
kxie@chelsio.com | 0b3d894 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 996 | log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, |
| 997 | "csk 0x%p,%u,0x%lx, %pI4:%u-%pI4:%u.\n", |
| 998 | csk, csk->state, csk->flags, |
| 999 | &csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port), |
| 1000 | &csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port)); |
| 1001 | |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1002 | cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); |
| 1003 | send_act_open_req(csk, skb, csk->l2t); |
| 1004 | return 0; |
| 1005 | |
| 1006 | rel_resource: |
| 1007 | if (skb) |
| 1008 | __kfree_skb(skb); |
| 1009 | return -EINVAL; |
| 1010 | } |
| 1011 | |
| 1012 | cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS] = { |
| 1013 | [CPL_ACT_ESTABLISH] = do_act_establish, |
| 1014 | [CPL_ACT_OPEN_RPL] = do_act_open_rpl, |
| 1015 | [CPL_PEER_CLOSE] = do_peer_close, |
| 1016 | [CPL_ABORT_REQ_RSS] = do_abort_req, |
| 1017 | [CPL_ABORT_RPL_RSS] = do_abort_rpl, |
| 1018 | [CPL_CLOSE_CON_RPL] = do_close_con_rpl, |
| 1019 | [CPL_TX_DMA_ACK] = do_wr_ack, |
| 1020 | [CPL_ISCSI_HDR] = do_iscsi_hdr, |
| 1021 | }; |
| 1022 | |
| 1023 | /** |
| 1024 | * cxgb3i_ofld_init - allocate and initialize resources for each adapter found |
| 1025 | * @cdev: cxgbi adapter |
| 1026 | */ |
| 1027 | int cxgb3i_ofld_init(struct cxgbi_device *cdev) |
| 1028 | { |
| 1029 | struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; |
| 1030 | struct adap_ports port; |
| 1031 | struct ofld_page_info rx_page_info; |
| 1032 | unsigned int wr_len; |
| 1033 | int rc; |
| 1034 | |
| 1035 | if (t3dev->ctl(t3dev, GET_WR_LEN, &wr_len) < 0 || |
| 1036 | t3dev->ctl(t3dev, GET_PORTS, &port) < 0 || |
| 1037 | t3dev->ctl(t3dev, GET_RX_PAGE_INFO, &rx_page_info) < 0) { |
| 1038 | pr_warn("t3 0x%p, offload up, ioctl failed.\n", t3dev); |
| 1039 | return -EINVAL; |
| 1040 | } |
| 1041 | |
| 1042 | if (cxgb3i_max_connect > CXGBI_MAX_CONN) |
| 1043 | cxgb3i_max_connect = CXGBI_MAX_CONN; |
| 1044 | |
| 1045 | rc = cxgbi_device_portmap_create(cdev, cxgb3i_sport_base, |
| 1046 | cxgb3i_max_connect); |
| 1047 | if (rc < 0) |
| 1048 | return rc; |
| 1049 | |
| 1050 | init_wr_tab(wr_len); |
| 1051 | cdev->csk_release_offload_resources = release_offload_resources; |
| 1052 | cdev->csk_push_tx_frames = push_tx_frames; |
| 1053 | cdev->csk_send_abort_req = send_abort_req; |
| 1054 | cdev->csk_send_close_req = send_close_req; |
| 1055 | cdev->csk_send_rx_credits = send_rx_credits; |
| 1056 | cdev->csk_alloc_cpls = alloc_cpls; |
| 1057 | cdev->csk_init_act_open = init_act_open; |
| 1058 | |
| 1059 | pr_info("cdev 0x%p, offload up, added.\n", cdev); |
| 1060 | return 0; |
| 1061 | } |
| 1062 | |
| 1063 | /* |
| 1064 | * functions to program the pagepod in h/w |
| 1065 | */ |
| 1066 | static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) |
| 1067 | { |
| 1068 | struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; |
| 1069 | |
| 1070 | memset(req, 0, sizeof(*req)); |
| 1071 | |
| 1072 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); |
| 1073 | req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | |
| 1074 | V_ULPTX_CMD(ULP_MEM_WRITE)); |
| 1075 | req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) | |
| 1076 | V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1)); |
| 1077 | } |
| 1078 | |
| 1079 | static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, |
| 1080 | unsigned int idx, unsigned int npods, |
| 1081 | struct cxgbi_gather_list *gl) |
| 1082 | { |
| 1083 | struct cxgbi_device *cdev = csk->cdev; |
| 1084 | struct cxgbi_ddp_info *ddp = cdev->ddp; |
| 1085 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; |
| 1086 | int i; |
| 1087 | |
| 1088 | log_debug(1 << CXGBI_DBG_DDP, |
| 1089 | "csk 0x%p, idx %u, npods %u, gl 0x%p.\n", |
| 1090 | csk, idx, npods, gl); |
| 1091 | |
| 1092 | for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { |
kxie@chelsio.com | b8ce8b5 | 2011-01-07 14:45:39 -0800 | [diff] [blame] | 1093 | struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + |
| 1094 | PPOD_SIZE, 0, GFP_ATOMIC); |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1095 | |
kxie@chelsio.com | b8ce8b5 | 2011-01-07 14:45:39 -0800 | [diff] [blame] | 1096 | if (!skb) |
| 1097 | return -ENOMEM; |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1098 | |
| 1099 | ulp_mem_io_set_hdr(skb, pm_addr); |
| 1100 | cxgbi_ddp_ppod_set((struct cxgbi_pagepod *)(skb->head + |
| 1101 | sizeof(struct ulp_mem_io)), |
| 1102 | hdr, gl, i * PPOD_PAGES_MAX); |
| 1103 | skb->priority = CPL_PRIORITY_CONTROL; |
| 1104 | cxgb3_ofld_send(cdev->lldev, skb); |
| 1105 | } |
| 1106 | return 0; |
| 1107 | } |
| 1108 | |
| 1109 | static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, |
| 1110 | unsigned int idx, unsigned int npods) |
| 1111 | { |
| 1112 | struct cxgbi_device *cdev = chba->cdev; |
| 1113 | struct cxgbi_ddp_info *ddp = cdev->ddp; |
| 1114 | unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; |
| 1115 | int i; |
| 1116 | |
| 1117 | log_debug(1 << CXGBI_DBG_DDP, |
| 1118 | "cdev 0x%p, idx %u, npods %u, tag 0x%x.\n", |
| 1119 | cdev, idx, npods, tag); |
| 1120 | |
| 1121 | for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { |
kxie@chelsio.com | b8ce8b5 | 2011-01-07 14:45:39 -0800 | [diff] [blame] | 1122 | struct sk_buff *skb = alloc_wr(sizeof(struct ulp_mem_io) + |
| 1123 | PPOD_SIZE, 0, GFP_ATOMIC); |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1124 | |
| 1125 | if (!skb) { |
kxie@chelsio.com | b8ce8b5 | 2011-01-07 14:45:39 -0800 | [diff] [blame] | 1126 | pr_err("tag 0x%x, 0x%x, %d/%u, skb OOM.\n", |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1127 | tag, idx, i, npods); |
| 1128 | continue; |
| 1129 | } |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1130 | ulp_mem_io_set_hdr(skb, pm_addr); |
| 1131 | skb->priority = CPL_PRIORITY_CONTROL; |
| 1132 | cxgb3_ofld_send(cdev->lldev, skb); |
| 1133 | } |
| 1134 | } |
| 1135 | |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1136 | static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, |
| 1137 | unsigned int tid, int pg_idx, bool reply) |
| 1138 | { |
kxie@chelsio.com | 24d3f95 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 1139 | struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1140 | GFP_KERNEL); |
| 1141 | struct cpl_set_tcb_field *req; |
| 1142 | u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; |
| 1143 | |
| 1144 | log_debug(1 << CXGBI_DBG_DDP, |
| 1145 | "csk 0x%p, tid %u, pg_idx %d.\n", csk, tid, pg_idx); |
| 1146 | if (!skb) |
| 1147 | return -ENOMEM; |
| 1148 | |
| 1149 | /* set up ulp submode and page size */ |
| 1150 | req = (struct cpl_set_tcb_field *)skb->head; |
| 1151 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| 1152 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); |
| 1153 | req->reply = V_NO_REPLY(reply ? 0 : 1); |
| 1154 | req->cpu_idx = 0; |
| 1155 | req->word = htons(31); |
| 1156 | req->mask = cpu_to_be64(0xF0000000); |
| 1157 | req->val = cpu_to_be64(val << 28); |
| 1158 | skb->priority = CPL_PRIORITY_CONTROL; |
| 1159 | |
| 1160 | cxgb3_ofld_send(csk->cdev->lldev, skb); |
| 1161 | return 0; |
| 1162 | } |
| 1163 | |
| 1164 | /** |
| 1165 | * cxgb3i_setup_conn_digest - setup conn. digest setting |
| 1166 | * @csk: cxgb tcp socket |
| 1167 | * @tid: connection id |
| 1168 | * @hcrc: header digest enabled |
| 1169 | * @dcrc: data digest enabled |
| 1170 | * @reply: request reply from h/w |
| 1171 | * set up the iscsi digest settings for a connection identified by tid |
| 1172 | */ |
| 1173 | static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, |
| 1174 | int hcrc, int dcrc, int reply) |
| 1175 | { |
kxie@chelsio.com | 24d3f95 | 2010-09-23 16:43:23 -0700 | [diff] [blame] | 1176 | struct sk_buff *skb = alloc_wr(sizeof(struct cpl_set_tcb_field), 0, |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1177 | GFP_KERNEL); |
| 1178 | struct cpl_set_tcb_field *req; |
| 1179 | u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); |
| 1180 | |
| 1181 | log_debug(1 << CXGBI_DBG_DDP, |
| 1182 | "csk 0x%p, tid %u, crc %d,%d.\n", csk, tid, hcrc, dcrc); |
| 1183 | if (!skb) |
| 1184 | return -ENOMEM; |
| 1185 | |
| 1186 | /* set up ulp submode and page size */ |
| 1187 | req = (struct cpl_set_tcb_field *)skb->head; |
| 1188 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| 1189 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); |
| 1190 | req->reply = V_NO_REPLY(reply ? 0 : 1); |
| 1191 | req->cpu_idx = 0; |
| 1192 | req->word = htons(31); |
| 1193 | req->mask = cpu_to_be64(0x0F000000); |
| 1194 | req->val = cpu_to_be64(val << 24); |
| 1195 | skb->priority = CPL_PRIORITY_CONTROL; |
| 1196 | |
| 1197 | cxgb3_ofld_send(csk->cdev->lldev, skb); |
| 1198 | return 0; |
| 1199 | } |
| 1200 | |
| 1201 | /** |
| 1202 | * t3_ddp_cleanup - release the cxgb3 adapter's ddp resource |
| 1203 | * @cdev: cxgb3i adapter |
| 1204 | * release all the resource held by the ddp pagepod manager for a given |
| 1205 | * adapter if needed |
| 1206 | */ |
| 1207 | |
| 1208 | static void t3_ddp_cleanup(struct cxgbi_device *cdev) |
| 1209 | { |
| 1210 | struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; |
| 1211 | |
| 1212 | if (cxgbi_ddp_cleanup(cdev)) { |
| 1213 | pr_info("t3dev 0x%p, ulp_iscsi no more user.\n", tdev); |
| 1214 | tdev->ulp_iscsi = NULL; |
| 1215 | } |
| 1216 | } |
| 1217 | |
| 1218 | /** |
| 1219 | * ddp_init - initialize the cxgb3 adapter's ddp resource |
| 1220 | * @cdev: cxgb3i adapter |
| 1221 | * initialize the ddp pagepod manager for a given adapter |
| 1222 | */ |
| 1223 | static int cxgb3i_ddp_init(struct cxgbi_device *cdev) |
| 1224 | { |
| 1225 | struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; |
| 1226 | struct cxgbi_ddp_info *ddp = tdev->ulp_iscsi; |
| 1227 | struct ulp_iscsi_info uinfo; |
| 1228 | unsigned int pgsz_factor[4]; |
Karen Xie | c682d60 | 2011-06-17 16:10:32 -0700 | [diff] [blame] | 1229 | int i, err; |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1230 | |
| 1231 | if (ddp) { |
| 1232 | kref_get(&ddp->refcnt); |
| 1233 | pr_warn("t3dev 0x%p, ddp 0x%p already set up.\n", |
| 1234 | tdev, tdev->ulp_iscsi); |
| 1235 | cdev->ddp = ddp; |
| 1236 | return -EALREADY; |
| 1237 | } |
| 1238 | |
| 1239 | err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); |
| 1240 | if (err < 0) { |
| 1241 | pr_err("%s, failed to get iscsi param err=%d.\n", |
| 1242 | tdev->name, err); |
| 1243 | return err; |
| 1244 | } |
| 1245 | |
| 1246 | err = cxgbi_ddp_init(cdev, uinfo.llimit, uinfo.ulimit, |
| 1247 | uinfo.max_txsz, uinfo.max_rxsz); |
| 1248 | if (err < 0) |
| 1249 | return err; |
| 1250 | |
| 1251 | ddp = cdev->ddp; |
| 1252 | |
| 1253 | uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; |
| 1254 | cxgbi_ddp_page_size_factor(pgsz_factor); |
Karen Xie | c682d60 | 2011-06-17 16:10:32 -0700 | [diff] [blame] | 1255 | for (i = 0; i < 4; i++) |
| 1256 | uinfo.pgsz_factor[i] = pgsz_factor[i]; |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1257 | uinfo.ulimit = uinfo.llimit + (ddp->nppods << PPOD_SIZE_SHIFT); |
| 1258 | |
| 1259 | err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); |
| 1260 | if (err < 0) { |
| 1261 | pr_warn("%s unable to set iscsi param err=%d, ddp disabled.\n", |
| 1262 | tdev->name, err); |
| 1263 | cxgbi_ddp_cleanup(cdev); |
| 1264 | return err; |
| 1265 | } |
| 1266 | tdev->ulp_iscsi = ddp; |
| 1267 | |
kxie@chelsio.com | 6f7efaa | 2010-08-16 20:55:53 -0700 | [diff] [blame] | 1268 | cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; |
| 1269 | cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; |
| 1270 | cdev->csk_ddp_set = ddp_set_map; |
| 1271 | cdev->csk_ddp_clear = ddp_clear_map; |
| 1272 | |
| 1273 | pr_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, " |
| 1274 | "%u/%u.\n", |
| 1275 | tdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, |
| 1276 | ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz, |
| 1277 | ddp->max_rxsz, uinfo.max_rxsz); |
| 1278 | return 0; |
| 1279 | } |
| 1280 | |
| 1281 | static void cxgb3i_dev_close(struct t3cdev *t3dev) |
| 1282 | { |
| 1283 | struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); |
| 1284 | |
| 1285 | if (!cdev || cdev->flags & CXGBI_FLAG_ADAPTER_RESET) { |
| 1286 | pr_info("0x%p close, f 0x%x.\n", cdev, cdev ? cdev->flags : 0); |
| 1287 | return; |
| 1288 | } |
| 1289 | |
| 1290 | cxgbi_device_unregister(cdev); |
| 1291 | } |
| 1292 | |
| 1293 | /** |
| 1294 | * cxgb3i_dev_open - init a t3 adapter structure and any h/w settings |
| 1295 | * @t3dev: t3cdev adapter |
| 1296 | */ |
| 1297 | static void cxgb3i_dev_open(struct t3cdev *t3dev) |
| 1298 | { |
| 1299 | struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); |
| 1300 | struct adapter *adapter = tdev2adap(t3dev); |
| 1301 | int i, err; |
| 1302 | |
| 1303 | if (cdev) { |
| 1304 | pr_info("0x%p, updating.\n", cdev); |
| 1305 | return; |
| 1306 | } |
| 1307 | |
| 1308 | cdev = cxgbi_device_register(0, adapter->params.nports); |
| 1309 | if (!cdev) { |
| 1310 | pr_warn("device 0x%p register failed.\n", t3dev); |
| 1311 | return; |
| 1312 | } |
| 1313 | |
| 1314 | cdev->flags = CXGBI_FLAG_DEV_T3 | CXGBI_FLAG_IPV4_SET; |
| 1315 | cdev->lldev = t3dev; |
| 1316 | cdev->pdev = adapter->pdev; |
| 1317 | cdev->ports = adapter->port; |
| 1318 | cdev->nports = adapter->params.nports; |
| 1319 | cdev->mtus = adapter->params.mtus; |
| 1320 | cdev->nmtus = NMTUS; |
| 1321 | cdev->snd_win = cxgb3i_snd_win; |
| 1322 | cdev->rcv_win = cxgb3i_rcv_win; |
| 1323 | cdev->rx_credit_thres = cxgb3i_rx_credit_thres; |
| 1324 | cdev->skb_tx_rsvd = CXGB3I_TX_HEADER_LEN; |
| 1325 | cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr_norss); |
| 1326 | cdev->dev_ddp_cleanup = t3_ddp_cleanup; |
| 1327 | cdev->itp = &cxgb3i_iscsi_transport; |
| 1328 | |
| 1329 | err = cxgb3i_ddp_init(cdev); |
| 1330 | if (err) { |
| 1331 | pr_info("0x%p ddp init failed\n", cdev); |
| 1332 | goto err_out; |
| 1333 | } |
| 1334 | |
| 1335 | err = cxgb3i_ofld_init(cdev); |
| 1336 | if (err) { |
| 1337 | pr_info("0x%p offload init failed\n", cdev); |
| 1338 | goto err_out; |
| 1339 | } |
| 1340 | |
| 1341 | err = cxgbi_hbas_add(cdev, CXGB3I_MAX_LUN, CXGBI_MAX_CONN, |
| 1342 | &cxgb3i_host_template, cxgb3i_stt); |
| 1343 | if (err) |
| 1344 | goto err_out; |
| 1345 | |
| 1346 | for (i = 0; i < cdev->nports; i++) |
| 1347 | cdev->hbas[i]->ipv4addr = |
| 1348 | cxgb3i_get_private_ipv4addr(cdev->ports[i]); |
| 1349 | |
| 1350 | pr_info("cdev 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n", |
| 1351 | cdev, cdev ? cdev->flags : 0, t3dev, err); |
| 1352 | return; |
| 1353 | |
| 1354 | err_out: |
| 1355 | cxgbi_device_unregister(cdev); |
| 1356 | } |
| 1357 | |
| 1358 | static void cxgb3i_dev_event_handler(struct t3cdev *t3dev, u32 event, u32 port) |
| 1359 | { |
| 1360 | struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); |
| 1361 | |
| 1362 | log_debug(1 << CXGBI_DBG_TOE, |
| 1363 | "0x%p, cdev 0x%p, event 0x%x, port 0x%x.\n", |
| 1364 | t3dev, cdev, event, port); |
| 1365 | if (!cdev) |
| 1366 | return; |
| 1367 | |
| 1368 | switch (event) { |
| 1369 | case OFFLOAD_STATUS_DOWN: |
| 1370 | cdev->flags |= CXGBI_FLAG_ADAPTER_RESET; |
| 1371 | break; |
| 1372 | case OFFLOAD_STATUS_UP: |
| 1373 | cdev->flags &= ~CXGBI_FLAG_ADAPTER_RESET; |
| 1374 | break; |
| 1375 | } |
| 1376 | } |
| 1377 | |
| 1378 | /** |
| 1379 | * cxgb3i_init_module - module init entry point |
| 1380 | * |
| 1381 | * initialize any driver wide global data structures and register itself |
| 1382 | * with the cxgb3 module |
| 1383 | */ |
| 1384 | static int __init cxgb3i_init_module(void) |
| 1385 | { |
| 1386 | int rc; |
| 1387 | |
| 1388 | printk(KERN_INFO "%s", version); |
| 1389 | |
| 1390 | rc = cxgbi_iscsi_init(&cxgb3i_iscsi_transport, &cxgb3i_stt); |
| 1391 | if (rc < 0) |
| 1392 | return rc; |
| 1393 | |
| 1394 | cxgb3_register_client(&t3_client); |
| 1395 | return 0; |
| 1396 | } |
| 1397 | |
| 1398 | /** |
| 1399 | * cxgb3i_exit_module - module cleanup/exit entry point |
| 1400 | * |
| 1401 | * go through the driver hba list and for each hba, release any resource held. |
| 1402 | * and unregisters iscsi transport and the cxgb3 module |
| 1403 | */ |
| 1404 | static void __exit cxgb3i_exit_module(void) |
| 1405 | { |
| 1406 | cxgb3_unregister_client(&t3_client); |
| 1407 | cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T3); |
| 1408 | cxgbi_iscsi_cleanup(&cxgb3i_iscsi_transport, &cxgb3i_stt); |
| 1409 | } |
| 1410 | |
| 1411 | module_init(cxgb3i_init_module); |
| 1412 | module_exit(cxgb3i_exit_module); |