1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2016 Chelsio Communications, Inc.
9 #include <linux/mutex.h>
10 #include <linux/list.h>
11 #include <linux/spinlock.h>
12 #include <linux/idr.h>
13 #include <linux/completion.h>
14 #include <linux/netdevice.h>
15 #include <linux/sched.h>
16 #include <linux/pci.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/inet.h>
19 #include <linux/wait.h>
20 #include <linux/kref.h>
21 #include <linux/timer.h>
24 #include <asm/byteorder.h>
26 #include <net/net_namespace.h>
28 #include <target/iscsi/iscsi_transport.h>
29 #include <iscsi_target_parameters.h>
30 #include <iscsi_target_login.h>
35 #include "cxgb4_uld.h"
37 #include "libcxgb_ppm.h"
38 #include "cxgbit_lro.h"
40 extern struct mutex cdev_list_lock;
41 extern struct list_head cdev_list_head;
47 struct scatterlist sg;
48 struct cxgbi_task_tag_info ttinfo;
53 #define CXGBIT_MAX_ISO_PAYLOAD \
54 min_t(u32, MAX_SKB_FRAGS * PAGE_SIZE, 65535)
56 struct cxgbit_iso_info {
63 enum cxgbit_skcb_flags {
64 SKCBF_TX_NEED_HDR = (1 << 0), /* packet needs a header */
65 SKCBF_TX_FLAG_COMPL = (1 << 1), /* wr completion flag */
66 SKCBF_TX_ISO = (1 << 2), /* iso cpl in tx skb */
67 SKCBF_RX_LRO = (1 << 3), /* lro skb */
70 struct cxgbit_skb_rx_cb {
73 void (*backlog_fn)(struct cxgbit_sock *, struct sk_buff *);
76 struct cxgbit_skb_tx_cb {
85 struct cxgbit_skb_tx_cb tx;
86 struct cxgbit_skb_rx_cb rx;
91 /* This member must be first. */
92 struct l2t_skb_cb l2t;
93 struct sk_buff *wr_next;
97 #define CXGBIT_SKB_CB(skb) ((union cxgbit_skb_cb *)&((skb)->cb[0]))
98 #define cxgbit_skcb_flags(skb) (CXGBIT_SKB_CB(skb)->flags)
99 #define cxgbit_skcb_submode(skb) (CXGBIT_SKB_CB(skb)->tx.submode)
100 #define cxgbit_skcb_tx_wr_next(skb) (CXGBIT_SKB_CB(skb)->wr_next)
101 #define cxgbit_skcb_tx_extralen(skb) (CXGBIT_SKB_CB(skb)->tx.extra_len)
102 #define cxgbit_skcb_rx_opcode(skb) (CXGBIT_SKB_CB(skb)->rx.opcode)
103 #define cxgbit_skcb_rx_backlog_fn(skb) (CXGBIT_SKB_CB(skb)->rx.backlog_fn)
104 #define cxgbit_rx_pdu_cb(skb) (CXGBIT_SKB_CB(skb)->rx.pdu_cb)
106 static inline void *cplhdr(struct sk_buff *skb)
111 enum cxgbit_cdev_flags {
117 #define NP_INFO_HASH_SIZE 32
120 struct np_info *next;
121 struct cxgbit_np *cnp;
125 struct cxgbit_list_head {
126 struct list_head list;
131 struct cxgbit_device {
132 struct list_head list;
133 struct cxgb4_lld_info lldi;
134 struct np_info *np_hash_tab[NP_INFO_HASH_SIZE];
137 u8 selectq[MAX_NPORTS][2];
138 struct cxgbit_list_head cskq;
144 struct cxgbit_wr_wait {
145 struct completion completion;
149 enum cxgbit_csk_state {
152 CSK_STATE_CONNECTING,
153 CSK_STATE_ESTABLISHED,
160 enum cxgbit_csk_flags {
161 CSK_TX_DATA_SENT = 0,
168 struct cxgbit_sock_common {
169 struct cxgbit_device *cdev;
170 struct sockaddr_storage local_addr;
171 struct sockaddr_storage remote_addr;
172 struct cxgbit_wr_wait wr_wait;
173 enum cxgbit_csk_state state;
178 struct cxgbit_sock_common com;
179 wait_queue_head_t accept_wait;
181 struct completion accept_comp;
182 struct list_head np_accept_list;
184 spinlock_t np_accept_lock;
190 struct cxgbit_sock_common com;
191 struct cxgbit_np *cnp;
192 struct iscsi_conn *conn;
193 struct l2t_entry *l2t;
194 struct dst_entry *dst;
195 struct list_head list;
196 struct sk_buff_head rxq;
197 struct sk_buff_head txq;
198 struct sk_buff_head ppodq;
199 struct sk_buff_head backlogq;
200 struct sk_buff_head skbq;
201 struct sk_buff *wr_pending_head;
202 struct sk_buff *wr_pending_tail;
204 struct sk_buff *lro_skb;
205 struct sk_buff *lro_hskb;
206 struct list_head accept_node;
209 wait_queue_head_t waitq;
235 #define CXGBIT_SUBMODE_HCRC 0x1
236 #define CXGBIT_SUBMODE_DCRC 0x2
238 #ifdef CONFIG_CHELSIO_T4_DCB
244 void _cxgbit_free_cdev(struct kref *kref);
245 void _cxgbit_free_csk(struct kref *kref);
246 void _cxgbit_free_cnp(struct kref *kref);
248 static inline void cxgbit_get_cdev(struct cxgbit_device *cdev)
250 kref_get(&cdev->kref);
253 static inline void cxgbit_put_cdev(struct cxgbit_device *cdev)
255 kref_put(&cdev->kref, _cxgbit_free_cdev);
258 static inline void cxgbit_get_csk(struct cxgbit_sock *csk)
260 kref_get(&csk->kref);
263 static inline void cxgbit_put_csk(struct cxgbit_sock *csk)
265 kref_put(&csk->kref, _cxgbit_free_csk);
268 static inline void cxgbit_get_cnp(struct cxgbit_np *cnp)
270 kref_get(&cnp->kref);
273 static inline void cxgbit_put_cnp(struct cxgbit_np *cnp)
275 kref_put(&cnp->kref, _cxgbit_free_cnp);
278 static inline void cxgbit_sock_reset_wr_list(struct cxgbit_sock *csk)
280 csk->wr_pending_tail = NULL;
281 csk->wr_pending_head = NULL;
284 static inline struct sk_buff *cxgbit_sock_peek_wr(const struct cxgbit_sock *csk)
286 return csk->wr_pending_head;
290 cxgbit_sock_enqueue_wr(struct cxgbit_sock *csk, struct sk_buff *skb)
292 cxgbit_skcb_tx_wr_next(skb) = NULL;
296 if (!csk->wr_pending_head)
297 csk->wr_pending_head = skb;
299 cxgbit_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
300 csk->wr_pending_tail = skb;
303 static inline struct sk_buff *cxgbit_sock_dequeue_wr(struct cxgbit_sock *csk)
305 struct sk_buff *skb = csk->wr_pending_head;
308 csk->wr_pending_head = cxgbit_skcb_tx_wr_next(skb);
309 cxgbit_skcb_tx_wr_next(skb) = NULL;
314 typedef void (*cxgbit_cplhandler_func)(struct cxgbit_device *,
317 int cxgbit_setup_np(struct iscsi_np *, struct sockaddr_storage *);
318 int cxgbit_setup_conn_digest(struct cxgbit_sock *);
319 int cxgbit_accept_np(struct iscsi_np *, struct iscsi_conn *);
320 void cxgbit_free_np(struct iscsi_np *);
321 void cxgbit_abort_conn(struct cxgbit_sock *csk);
322 void cxgbit_free_conn(struct iscsi_conn *);
323 extern cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS];
324 int cxgbit_get_login_rx(struct iscsi_conn *, struct iscsi_login *);
325 int cxgbit_rx_data_ack(struct cxgbit_sock *);
326 int cxgbit_l2t_send(struct cxgbit_device *, struct sk_buff *,
328 void cxgbit_push_tx_frames(struct cxgbit_sock *);
329 int cxgbit_put_login_tx(struct iscsi_conn *, struct iscsi_login *, u32);
330 int cxgbit_xmit_pdu(struct iscsi_conn *, struct iscsi_cmd *,
331 struct iscsi_datain_req *, const void *, u32);
332 void cxgbit_get_r2t_ttt(struct iscsi_conn *, struct iscsi_cmd *,
334 u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *);
335 int cxgbit_ofld_send(struct cxgbit_device *, struct sk_buff *);
336 void cxgbit_get_rx_pdu(struct iscsi_conn *);
337 int cxgbit_validate_params(struct iscsi_conn *);
338 struct cxgbit_device *cxgbit_find_device(struct net_device *, u8 *);
341 int cxgbit_ddp_init(struct cxgbit_device *);
342 int cxgbit_setup_conn_pgidx(struct cxgbit_sock *, u32);
343 int cxgbit_reserve_ttt(struct cxgbit_sock *, struct iscsi_cmd *);
344 void cxgbit_unmap_cmd(struct iscsi_conn *, struct iscsi_cmd *);
347 struct cxgbi_ppm *cdev2ppm(struct cxgbit_device *cdev)
349 return (struct cxgbi_ppm *)(*cdev->lldi.iscsi_ppm);
351 #endif /* __CXGBIT_H__ */