2 * Copyright (c) 2016 Chelsio Communications, Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
12 #include <linux/mutex.h>
13 #include <linux/list.h>
14 #include <linux/spinlock.h>
15 #include <linux/idr.h>
16 #include <linux/completion.h>
17 #include <linux/netdevice.h>
18 #include <linux/sched.h>
19 #include <linux/pci.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/inet.h>
22 #include <linux/wait.h>
23 #include <linux/kref.h>
24 #include <linux/timer.h>
27 #include <asm/byteorder.h>
29 #include <net/net_namespace.h>
31 #include <target/iscsi/iscsi_transport.h>
32 #include <iscsi_target_parameters.h>
33 #include <iscsi_target_login.h>
38 #include "cxgb4_uld.h"
40 #include "libcxgb_ppm.h"
41 #include "cxgbit_lro.h"
43 extern struct mutex cdev_list_lock;
44 extern struct list_head cdev_list_head;
50 struct scatterlist sg;
51 struct cxgbi_task_tag_info ttinfo;
56 #define CXGBIT_MAX_ISO_PAYLOAD \
57 min_t(u32, MAX_SKB_FRAGS * PAGE_SIZE, 65535)
59 struct cxgbit_iso_info {
66 enum cxgbit_skcb_flags {
67 SKCBF_TX_NEED_HDR = (1 << 0), /* packet needs a header */
68 SKCBF_TX_FLAG_COMPL = (1 << 1), /* wr completion flag */
69 SKCBF_TX_ISO = (1 << 2), /* iso cpl in tx skb */
70 SKCBF_RX_LRO = (1 << 3), /* lro skb */
73 struct cxgbit_skb_rx_cb {
76 void (*backlog_fn)(struct cxgbit_sock *, struct sk_buff *);
79 struct cxgbit_skb_tx_cb {
88 struct cxgbit_skb_tx_cb tx;
89 struct cxgbit_skb_rx_cb rx;
94 /* This member must be first. */
95 struct l2t_skb_cb l2t;
96 struct sk_buff *wr_next;
100 #define CXGBIT_SKB_CB(skb) ((union cxgbit_skb_cb *)&((skb)->cb[0]))
101 #define cxgbit_skcb_flags(skb) (CXGBIT_SKB_CB(skb)->flags)
102 #define cxgbit_skcb_submode(skb) (CXGBIT_SKB_CB(skb)->tx.submode)
103 #define cxgbit_skcb_tx_wr_next(skb) (CXGBIT_SKB_CB(skb)->wr_next)
104 #define cxgbit_skcb_tx_extralen(skb) (CXGBIT_SKB_CB(skb)->tx.extra_len)
105 #define cxgbit_skcb_rx_opcode(skb) (CXGBIT_SKB_CB(skb)->rx.opcode)
106 #define cxgbit_skcb_rx_backlog_fn(skb) (CXGBIT_SKB_CB(skb)->rx.backlog_fn)
107 #define cxgbit_rx_pdu_cb(skb) (CXGBIT_SKB_CB(skb)->rx.pdu_cb)
109 static inline void *cplhdr(struct sk_buff *skb)
114 enum cxgbit_cdev_flags {
120 #define NP_INFO_HASH_SIZE 32
123 struct np_info *next;
124 struct cxgbit_np *cnp;
128 struct cxgbit_list_head {
129 struct list_head list;
134 struct cxgbit_device {
135 struct list_head list;
136 struct cxgb4_lld_info lldi;
137 struct np_info *np_hash_tab[NP_INFO_HASH_SIZE];
140 u8 selectq[MAX_NPORTS][2];
141 struct cxgbit_list_head cskq;
147 struct cxgbit_wr_wait {
148 struct completion completion;
152 enum cxgbit_csk_state {
155 CSK_STATE_CONNECTING,
156 CSK_STATE_ESTABLISHED,
163 enum cxgbit_csk_flags {
164 CSK_TX_DATA_SENT = 0,
170 struct cxgbit_sock_common {
171 struct cxgbit_device *cdev;
172 struct sockaddr_storage local_addr;
173 struct sockaddr_storage remote_addr;
174 struct cxgbit_wr_wait wr_wait;
175 enum cxgbit_csk_state state;
180 struct cxgbit_sock_common com;
181 wait_queue_head_t accept_wait;
183 struct completion accept_comp;
184 struct list_head np_accept_list;
186 spinlock_t np_accept_lock;
192 struct cxgbit_sock_common com;
193 struct cxgbit_np *cnp;
194 struct iscsi_conn *conn;
195 struct l2t_entry *l2t;
196 struct dst_entry *dst;
197 struct list_head list;
198 struct sk_buff_head rxq;
199 struct sk_buff_head txq;
200 struct sk_buff_head ppodq;
201 struct sk_buff_head backlogq;
202 struct sk_buff_head skbq;
203 struct sk_buff *wr_pending_head;
204 struct sk_buff *wr_pending_tail;
206 struct sk_buff *lro_skb;
207 struct sk_buff *lro_hskb;
208 struct list_head accept_node;
211 wait_queue_head_t waitq;
212 wait_queue_head_t ack_waitq;
238 #define CXGBIT_SUBMODE_HCRC 0x1
239 #define CXGBIT_SUBMODE_DCRC 0x2
241 #ifdef CONFIG_CHELSIO_T4_DCB
247 void _cxgbit_free_cdev(struct kref *kref);
248 void _cxgbit_free_csk(struct kref *kref);
249 void _cxgbit_free_cnp(struct kref *kref);
251 static inline void cxgbit_get_cdev(struct cxgbit_device *cdev)
253 kref_get(&cdev->kref);
256 static inline void cxgbit_put_cdev(struct cxgbit_device *cdev)
258 kref_put(&cdev->kref, _cxgbit_free_cdev);
261 static inline void cxgbit_get_csk(struct cxgbit_sock *csk)
263 kref_get(&csk->kref);
266 static inline void cxgbit_put_csk(struct cxgbit_sock *csk)
268 kref_put(&csk->kref, _cxgbit_free_csk);
271 static inline void cxgbit_get_cnp(struct cxgbit_np *cnp)
273 kref_get(&cnp->kref);
276 static inline void cxgbit_put_cnp(struct cxgbit_np *cnp)
278 kref_put(&cnp->kref, _cxgbit_free_cnp);
281 static inline void cxgbit_sock_reset_wr_list(struct cxgbit_sock *csk)
283 csk->wr_pending_tail = NULL;
284 csk->wr_pending_head = NULL;
287 static inline struct sk_buff *cxgbit_sock_peek_wr(const struct cxgbit_sock *csk)
289 return csk->wr_pending_head;
293 cxgbit_sock_enqueue_wr(struct cxgbit_sock *csk, struct sk_buff *skb)
295 cxgbit_skcb_tx_wr_next(skb) = NULL;
299 if (!csk->wr_pending_head)
300 csk->wr_pending_head = skb;
302 cxgbit_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
303 csk->wr_pending_tail = skb;
306 static inline struct sk_buff *cxgbit_sock_dequeue_wr(struct cxgbit_sock *csk)
308 struct sk_buff *skb = csk->wr_pending_head;
311 csk->wr_pending_head = cxgbit_skcb_tx_wr_next(skb);
312 cxgbit_skcb_tx_wr_next(skb) = NULL;
317 typedef void (*cxgbit_cplhandler_func)(struct cxgbit_device *,
320 int cxgbit_setup_np(struct iscsi_np *, struct sockaddr_storage *);
321 int cxgbit_setup_conn_digest(struct cxgbit_sock *);
322 int cxgbit_accept_np(struct iscsi_np *, struct iscsi_conn *);
323 void cxgbit_free_np(struct iscsi_np *);
324 void cxgbit_free_conn(struct iscsi_conn *);
325 extern cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS];
326 int cxgbit_get_login_rx(struct iscsi_conn *, struct iscsi_login *);
327 int cxgbit_rx_data_ack(struct cxgbit_sock *);
328 int cxgbit_l2t_send(struct cxgbit_device *, struct sk_buff *,
330 void cxgbit_push_tx_frames(struct cxgbit_sock *);
331 int cxgbit_put_login_tx(struct iscsi_conn *, struct iscsi_login *, u32);
332 int cxgbit_xmit_pdu(struct iscsi_conn *, struct iscsi_cmd *,
333 struct iscsi_datain_req *, const void *, u32);
334 void cxgbit_get_r2t_ttt(struct iscsi_conn *, struct iscsi_cmd *,
336 u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *);
337 int cxgbit_ofld_send(struct cxgbit_device *, struct sk_buff *);
338 void cxgbit_get_rx_pdu(struct iscsi_conn *);
339 int cxgbit_validate_params(struct iscsi_conn *);
340 struct cxgbit_device *cxgbit_find_device(struct net_device *, u8 *);
343 int cxgbit_ddp_init(struct cxgbit_device *);
344 int cxgbit_setup_conn_pgidx(struct cxgbit_sock *, u32);
345 int cxgbit_reserve_ttt(struct cxgbit_sock *, struct iscsi_cmd *);
346 void cxgbit_release_cmd(struct iscsi_conn *, struct iscsi_cmd *);
349 struct cxgbi_ppm *cdev2ppm(struct cxgbit_device *cdev)
351 return (struct cxgbi_ppm *)(*cdev->lldi.iscsi_ppm);
353 #endif /* __CXGBIT_H__ */