This file contains data structure
definitions for cxgbit.ko.
Signed-off-by: Varun Prakash <varun@xxxxxxxxxxx>
---
drivers/target/iscsi/cxgbit/cxgbit.h | 363 +++++++++++++++++++++++++++++++++++
1 file changed, 363 insertions(+)
create mode 100644 drivers/target/iscsi/cxgbit/cxgbit.h
diff --git a/drivers/target/iscsi/cxgbit/cxgbit.h b/drivers/target/iscsi/cxgbit/cxgbit.h
new file mode 100644
index 0000000..3ceb5ad
--- /dev/null
+++ b/drivers/target/iscsi/cxgbit/cxgbit.h
@@ -0,0 +1,363 @@
+/*
+ * Copyright (c) 2016 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __CXGBIT_H__
+#define __CXGBIT_H__
+
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/idr.h>
+#include <linux/completion.h>
+#include <linux/netdevice.h>
+#include <linux/sched.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/inet.h>
+#include <linux/wait.h>
+#include <linux/kref.h>
+#include <linux/timer.h>
+#include <linux/io.h>
+
+#include <asm/byteorder.h>
+
+#include <net/net_namespace.h>
+
+#include <target/iscsi/iscsi_transport.h>
+#include <iscsi_target_parameters.h>
+#include <iscsi_target_login.h>
+
+#include "t4_regs.h"
+#include "t4_msg.h"
+#include "cxgb4.h"
+#include "cxgb4_uld.h"
+#include "l2t.h"
+#include "cxgb4_ppm.h"
+#include "cxgbit_lro.h"
+
+extern struct mutex cdev_list_lock;
+extern struct list_head cdev_list_head;
+struct cxgbit_np;
+
+struct cxgbit_sock;
+
+struct cxgbit_cmd {
+ struct scatterlist sg;
+ struct cxgbi_task_tag_info ttinfo;
+ bool setup_ddp;
+ bool release;
+};
+
+#define CXGBIT_MAX_ISO_PAYLOAD \
+ min_t(u32, MAX_SKB_FRAGS * PAGE_SIZE, 65535)
+
+struct cxgbit_iso_info {
+ u8 flags;
+ u32 mpdu;
+ u32 len;
+ u32 burst_len;
+};
+
+enum cxgbit_skcb_flags {
+ SKCBF_TX_NEED_HDR = (1 << 0), /* packet needs a header */
+ SKCBF_TX_FLAG_COMPL = (1 << 1), /* wr completion flag */
+ SKCBF_TX_ISO = (1 << 2), /* iso cpl in tx skb */
+ SKCBF_RX_LRO = (1 << 3), /* lro skb */
+};
+
+struct cxgbit_skb_rx_cb {
+ u8 opcode;
+ void *pdu_cb;
+ void (*backlog_fn)(struct cxgbit_sock *, struct sk_buff *);
+};
+
+struct cxgbit_skb_tx_cb {
+ u8 submode;
+ u32 extra_len;
+};
+
+union cxgbit_skb_cb {
+ struct {
+ u8 flags;
+ union {
+ struct cxgbit_skb_tx_cb tx;
+ struct cxgbit_skb_rx_cb rx;
+ };
+ };
+
+ struct {
+ /* This member must be first. */
+ struct l2t_skb_cb l2t;
+ struct sk_buff *wr_next;
+ };
+};
+
+#define CXGBIT_SKB_CB(skb) ((union cxgbit_skb_cb *)&((skb)->cb[0]))
+#define cxgbit_skcb_flags(skb) (CXGBIT_SKB_CB(skb)->flags)
+#define cxgbit_skcb_submode(skb) (CXGBIT_SKB_CB(skb)->tx.submode)
+#define cxgbit_skcb_tx_wr_next(skb) (CXGBIT_SKB_CB(skb)->wr_next)
+#define cxgbit_skcb_tx_extralen(skb) (CXGBIT_SKB_CB(skb)->tx.extra_len)
+#define cxgbit_skcb_rx_opcode(skb) (CXGBIT_SKB_CB(skb)->rx.opcode)
+#define cxgbit_skcb_rx_backlog_fn(skb) (CXGBIT_SKB_CB(skb)->rx.backlog_fn)
+#define cxgbit_rx_pdu_cb(skb) (CXGBIT_SKB_CB(skb)->rx.pdu_cb)
+
+static inline void *cplhdr(struct sk_buff *skb)
+{
+ return skb->data;
+}
+
+enum cxgbit_cdev_flags {
+ CDEV_STATE_UP = 0,
+ CDEV_ISO_ENABLE,
+ CDEV_DDP_ENABLE,
+};
+
+#define NP_INFO_HASH_SIZE 32
+
+struct np_info {
+ struct np_info *next;
+ struct cxgbit_np *cnp;
+ unsigned int stid;
+};
+
+struct cxgbit_list_head {
+ struct list_head list;
+ /* device lock */
+ spinlock_t lock;
+};
+
+struct cxgbit_device {
+ struct list_head list;
+ struct cxgb4_lld_info lldi;
+ struct np_info *np_hash_tab[NP_INFO_HASH_SIZE];
+ /* np lock */
+ spinlock_t np_lock;
+ u8 selectq[MAX_NPORTS][2];
+ struct cxgbit_list_head cskq;
+ u32 mdsl;
+ struct kref kref;
+ unsigned long flags;
+};
+
+struct cxgbit_wr_wait {
+ struct completion completion;
+ int ret;
+};
+
+enum cxgbit_csk_state {
+ CSK_STATE_IDLE = 0,
+ CSK_STATE_LISTEN,
+ CSK_STATE_CONNECTING,
+ CSK_STATE_ESTABLISHED,
+ CSK_STATE_ABORTING,
+ CSK_STATE_CLOSING,
+ CSK_STATE_MORIBUND,
+ CSK_STATE_DEAD,
+};
+
+enum cxgbit_csk_flags {
+ CSK_TX_DATA_SENT = 0,
+ CSK_TX_FIN,
+ CSK_LOGIN_PDU_DONE,
+ CSK_LOGIN_DONE,
+ CSK_DDP_ENABLE,
+};
+
+struct cxgbit_sock_common {
+ struct cxgbit_device *cdev;
+ struct sockaddr_storage local_addr;
+ struct sockaddr_storage remote_addr;
+ struct cxgbit_wr_wait wr_wait;
+ enum cxgbit_csk_state state;
+ unsigned long flags;
+};
+
+struct cxgbit_np {
+ struct cxgbit_sock_common com;
+ wait_queue_head_t accept_wait;
+ struct iscsi_np *np;
+ struct completion accept_comp;
+ struct list_head np_accept_list;
+ /* np accept lock */
+ spinlock_t np_accept_lock;
+ struct kref kref;
+ unsigned int stid;
+};
+
+struct cxgbit_sock {
+ struct cxgbit_sock_common com;
+ struct cxgbit_np *cnp;
+ struct iscsi_conn *conn;
+ struct l2t_entry *l2t;
+ struct dst_entry *dst;
+ struct list_head list;
+ struct sk_buff_head rxq;
+ struct sk_buff_head txq;
+ struct sk_buff_head ppodq;
+ struct sk_buff_head backlogq;
+ struct sk_buff_head skbq;
+ struct sk_buff *wr_pending_head;
+ struct sk_buff *wr_pending_tail;
+ struct sk_buff *skb;
+ struct sk_buff *lro_skb;
+ struct sk_buff *lro_skb_hold;
+ struct list_head accept_node;
+ /* socket lock */
+ spinlock_t lock;
+ wait_queue_head_t waitq;
+ wait_queue_head_t ack_waitq;
+ bool lock_owner;
+ struct kref kref;
+ u32 max_iso_npdu;
+ u32 wr_cred;
+ u32 wr_una_cred;
+ u32 wr_max_cred;
+ u32 snd_una;
+ u32 tid;
+ u32 snd_nxt;
+ u32 rcv_nxt;
+ u32 smac_idx;
+ u32 tx_chan;
+ u32 mtu;
+ u32 write_seq;
+ u32 rx_credits;
+ u32 snd_win;
+ u32 rcv_win;
+ u16 mss;
+ u16 emss;
+ u16 plen;
+ u16 rss_qid;
+ u16 txq_idx;
+ u16 ctrlq_idx;
+ u8 tos;
+ u8 port_id;
+#define CXGBIT_SUBMODE_HCRC 0x1
+#define CXGBIT_SUBMODE_DCRC 0x2
+ u8 submode;
+#ifdef CONFIG_CHELSIO_T4_DCB
+ u8 dcb_priority;
+#endif
+ u8 snd_wscale;
+};
+
+void _cxgbit_free_cdev(struct kref *kref);
+void _cxgbit_free_csk(struct kref *kref);
+void _cxgbit_free_cnp(struct kref *kref);
+
+static inline void cxgbit_get_cdev(struct cxgbit_device *cdev)
+{
+ kref_get(&cdev->kref);
+}
+
+static inline void cxgbit_put_cdev(struct cxgbit_device *cdev)
+{
+ kref_put(&cdev->kref, _cxgbit_free_cdev);
+}
+
+static inline void cxgbit_get_csk(struct cxgbit_sock *csk)
+{
+ kref_get(&csk->kref);
+}
+
+static inline void cxgbit_put_csk(struct cxgbit_sock *csk)
+{
+ kref_put(&csk->kref, _cxgbit_free_csk);
+}
+
+static inline void cxgbit_get_cnp(struct cxgbit_np *cnp)
+{
+ kref_get(&cnp->kref);
+}
+
+static inline void cxgbit_put_cnp(struct cxgbit_np *cnp)
+{
+ kref_put(&cnp->kref, _cxgbit_free_cnp);
+}
+
+static inline void cxgbit_sock_reset_wr_list(struct cxgbit_sock *csk)
+{
+ csk->wr_pending_tail = NULL;
+ csk->wr_pending_head = NULL;
+}
+
+static inline struct
+sk_buff *cxgbit_sock_peek_wr(const struct cxgbit_sock *csk)
+{
+ return csk->wr_pending_head;
+}
+
+static inline void cxgbit_sock_enqueue_wr(struct cxgbit_sock *csk,
+ struct sk_buff *skb)
+{
+ cxgbit_skcb_tx_wr_next(skb) = NULL;
+
+ /*
+ * We want to take an extra reference since both us and the driver
+ * need to free the packet before it's really freed.
+ */
+ skb_get(skb);
+
+ if (!csk->wr_pending_head)
+ csk->wr_pending_head = skb;
+ else
+ cxgbit_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
+ csk->wr_pending_tail = skb;
+}
+
+static inline struct
+sk_buff *cxgbit_sock_dequeue_wr(struct cxgbit_sock *csk)
+{
+ struct sk_buff *skb = csk->wr_pending_head;
+
+ if (likely(skb)) {
+ csk->wr_pending_head = cxgbit_skcb_tx_wr_next(skb);
+ cxgbit_skcb_tx_wr_next(skb) = NULL;
+ }
+ return skb;
+}
+
+typedef void (*cxgbit_cplhandler_func)(struct cxgbit_device *cdev,
+ struct sk_buff *skb);
+
+int cxgbit_setup_np(struct iscsi_np *np,
+ struct __kernel_sockaddr_storage *ksockaddr);
+int cxgbit_setup_conn_digest(struct cxgbit_sock *);
+int cxgbit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn);
+void cxgbit_free_np(struct iscsi_np *np);
+void cxgbit_free_conn(struct iscsi_conn *conn);
+extern cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS];
+int cxgbit_get_login_rx(struct iscsi_conn *conn,
+ struct iscsi_login *login);
+int cxgbit_rx_data_ack(struct cxgbit_sock *csk);
+int cxgbit_l2t_send(struct cxgbit_device *cdev, struct sk_buff *skb,
+ struct l2t_entry *l2e);
+void push_tx_frames(struct cxgbit_sock *csk);
+int cxgbit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login,
+ u32 length);
+int cxgbit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ int state);
+int
+cxgbit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ int state);
+u32 send_tx_flowc_wr(struct cxgbit_sock *csk);
+int cxgbit_ofld_send(struct cxgbit_device *cdev, struct sk_buff *skb);
+void cxgbit_rx_pdu(struct iscsi_conn *);
+int cxgbit_validate_params(struct iscsi_conn *);
+
+/* DDP */
+int cxgbit_ddp_init(struct cxgbit_device *);
+int cxgbit_setup_conn_pgidx(struct cxgbit_sock *, u32);
+int cxgbit_reserve_ttt(struct cxgbit_sock *, struct iscsi_cmd *);
+void cxgbit_release_cmd(struct iscsi_conn *, struct iscsi_cmd *);
+
+static inline
+struct cxgbi_ppm *cdev2ppm(struct cxgbit_device *cdev)
+{
+ return (struct cxgbi_ppm *)(*cdev->lldi.iscsi_ppm);
+}
+#endif /* __CXGBIT_H__ */
--
2.0.2
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