| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Karen Xie | 2295 | 86.73% | 6 | 24.00% |
| Varun Prakash | 262 | 9.90% | 9 | 36.00% |
| Anish Bhatt | 65 | 2.46% | 2 | 8.00% |
| Michael Christie | 12 | 0.45% | 2 | 8.00% |
| Joe Perches | 4 | 0.15% | 1 | 4.00% |
| Lucas De Marchi | 3 | 0.11% | 1 | 4.00% |
| Peter Zijlstra | 2 | 0.08% | 1 | 4.00% |
| Al Viro | 1 | 0.04% | 1 | 4.00% |
| Pekka J Enberg | 1 | 0.04% | 1 | 4.00% |
| Hannes Reinecke | 1 | 0.04% | 1 | 4.00% |
| Total | 2646 | 25 |
/* * libcxgbi.h: Chelsio common library for T3/T4 iSCSI driver. * * Copyright (c) 2010-2015 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 as published by * the Free Software Foundation. * * Written by: Karen Xie (kxie@chelsio.com) * Written by: Rakesh Ranjan (rranjan@chelsio.com) */ #ifndef __LIBCXGBI_H__ #define __LIBCXGBI_H__ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/debugfs.h> #include <linux/list.h> #include <linux/netdevice.h> #include <linux/if_vlan.h> #include <linux/scatterlist.h> #include <linux/skbuff.h> #include <linux/vmalloc.h> #include <linux/version.h> #include <scsi/scsi_device.h> #include <scsi/libiscsi_tcp.h> #include <libcxgb_ppm.h> enum cxgbi_dbg_flag { CXGBI_DBG_ISCSI, CXGBI_DBG_DDP, CXGBI_DBG_TOE, CXGBI_DBG_SOCK, CXGBI_DBG_PDU_TX, CXGBI_DBG_PDU_RX, CXGBI_DBG_DEV, }; #define log_debug(level, fmt, ...) \ do { \ if (dbg_level & (level)) \ pr_info(fmt, ##__VA_ARGS__); \ } while (0) #define pr_info_ipaddr(fmt_trail, \ addr1, addr2, args_trail...) \ do { \ if (!((1 << CXGBI_DBG_SOCK) & dbg_level)) \ break; \ pr_info("%pISpc - %pISpc, " fmt_trail, \ addr1, addr2, args_trail); \ } while (0) /* max. connections per adapter */ #define CXGBI_MAX_CONN 16384 /* always allocate rooms for AHS */ #define SKB_TX_ISCSI_PDU_HEADER_MAX \ (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE) #define ISCSI_PDU_NONPAYLOAD_LEN 312 /* bhs(48) + ahs(256) + digest(8)*/ /* * align pdu size to multiple of 512 for better performance */ #define cxgbi_align_pdu_size(n) do { n = (n) & (~511); } while (0) #define ULP2_MODE_ISCSI 2 #define ULP2_MAX_PKT_SIZE 16224 #define ULP2_MAX_PDU_PAYLOAD \ (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN) /* * For iscsi connections HW may inserts digest bytes into the pdu. Those digest * bytes are not sent by the host but are part of the TCP payload and therefore * consume TCP sequence space. */ static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 }; static inline unsigned int cxgbi_ulp_extra_len(int submode) { return ulp2_extra_len[submode & 3]; } #define CPL_RX_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */ #define CPL_RX_DDP_STATUS_PAD_SHIFT 19 /* pad error */ #define CPL_RX_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */ #define CPL_RX_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */ /* * sge_opaque_hdr - * Opaque version of structure the SGE stores at skb->head of TX_DATA packets * and for which we must reserve space. */ struct sge_opaque_hdr { void *dev; dma_addr_t addr[MAX_SKB_FRAGS + 1]; }; struct cxgbi_sock { struct cxgbi_device *cdev; int tid; int atid; unsigned long flags; unsigned int mtu; unsigned short rss_qid; unsigned short txq_idx; unsigned short advmss; unsigned int tx_chan; unsigned int rx_chan; unsigned int mss_idx; unsigned int smac_idx; unsigned char port_id; int wr_max_cred; int wr_cred; int wr_una_cred; #ifdef CONFIG_CHELSIO_T4_DCB u8 dcb_priority; #endif unsigned char hcrc_len; unsigned char dcrc_len; void *l2t; struct sk_buff *wr_pending_head; struct sk_buff *wr_pending_tail; struct sk_buff *cpl_close; struct sk_buff *cpl_abort_req; struct sk_buff *cpl_abort_rpl; struct sk_buff *skb_ulp_lhdr; spinlock_t lock; struct kref refcnt; unsigned int state; unsigned int csk_family; union { struct sockaddr_in saddr; struct sockaddr_in6 saddr6; }; union { struct sockaddr_in daddr; struct sockaddr_in6 daddr6; }; struct dst_entry *dst; struct sk_buff_head receive_queue; struct sk_buff_head write_queue; struct timer_list retry_timer; struct completion cmpl; int err; rwlock_t callback_lock; void *user_data; u32 rcv_nxt; u32 copied_seq; u32 rcv_wup; u32 snd_nxt; u32 snd_una; u32 write_seq; u32 snd_win; u32 rcv_win; }; /* * connection states */ enum cxgbi_sock_states{ CTP_CLOSED, CTP_CONNECTING, CTP_ACTIVE_OPEN, CTP_ESTABLISHED, CTP_ACTIVE_CLOSE, CTP_PASSIVE_CLOSE, CTP_CLOSE_WAIT_1, CTP_CLOSE_WAIT_2, CTP_ABORTING, }; /* * Connection flags -- many to track some close related events. */ enum cxgbi_sock_flags { CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */ CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */ CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */ CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */ CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */ CTPF_HAS_ATID, /* reserved atid */ CTPF_HAS_TID, /* reserved hw tid */ CTPF_OFFLOAD_DOWN, /* offload function off */ CTPF_LOGOUT_RSP_RCVD, /* received logout response */ }; struct cxgbi_skb_rx_cb { __u32 ddigest; __u32 pdulen; }; struct cxgbi_skb_tx_cb { void *handle; void *arp_err_handler; struct sk_buff *wr_next; }; enum cxgbi_skcb_flags { SKCBF_TX_NEED_HDR, /* packet needs a header */ SKCBF_TX_MEM_WRITE, /* memory write */ SKCBF_TX_FLAG_COMPL, /* wr completion flag */ SKCBF_RX_COALESCED, /* received whole pdu */ SKCBF_RX_HDR, /* received pdu header */ SKCBF_RX_DATA, /* received pdu payload */ SKCBF_RX_STATUS, /* received ddp status */ SKCBF_RX_ISCSI_COMPL, /* received iscsi completion */ SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */ SKCBF_RX_HCRC_ERR, /* header digest error */ SKCBF_RX_DCRC_ERR, /* data digest error */ SKCBF_RX_PAD_ERR, /* padding byte error */ }; struct cxgbi_skb_cb { union { struct cxgbi_skb_rx_cb rx; struct cxgbi_skb_tx_cb tx; }; unsigned char ulp_mode; unsigned long flags; unsigned int seq; }; #define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0])) #define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags) #define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode) #define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq) #define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest) #define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen) #define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next) static inline void cxgbi_skcb_set_flag(struct sk_buff *skb, enum cxgbi_skcb_flags flag) { __set_bit(flag, &(cxgbi_skcb_flags(skb))); } static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb, enum cxgbi_skcb_flags flag) { __clear_bit(flag, &(cxgbi_skcb_flags(skb))); } static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb, enum cxgbi_skcb_flags flag) { return test_bit(flag, &(cxgbi_skcb_flags(skb))); } static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk, enum cxgbi_sock_flags flag) { __set_bit(flag, &csk->flags); log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx, bit %d.\n", csk, csk->state, csk->flags, flag); } static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk, enum cxgbi_sock_flags flag) { __clear_bit(flag, &csk->flags); log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx, bit %d.\n", csk, csk->state, csk->flags, flag); } static inline int cxgbi_sock_flag(struct cxgbi_sock *csk, enum cxgbi_sock_flags flag) { if (csk == NULL) return 0; return test_bit(flag, &csk->flags); } static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state) { log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx, state -> %u.\n", csk, csk->state, csk->flags, state); csk->state = state; } static inline void cxgbi_sock_free(struct kref *kref) { struct cxgbi_sock *csk = container_of(kref, struct cxgbi_sock, refcnt); if (csk) { log_debug(1 << CXGBI_DBG_SOCK, "free csk 0x%p, state %u, flags 0x%lx\n", csk, csk->state, csk->flags); kfree(csk); } } static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk) { log_debug(1 << CXGBI_DBG_SOCK, "%s, put csk 0x%p, ref %u-1.\n", fn, csk, kref_read(&csk->refcnt)); kref_put(&csk->refcnt, cxgbi_sock_free); } #define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk) static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk) { log_debug(1 << CXGBI_DBG_SOCK, "%s, get csk 0x%p, ref %u+1.\n", fn, csk, kref_read(&csk->refcnt)); kref_get(&csk->refcnt); } #define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk) static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk) { return csk->state >= CTP_ACTIVE_CLOSE; } static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk) { return csk->state == CTP_ESTABLISHED; } static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk) { struct sk_buff *skb; while ((skb = __skb_dequeue(&csk->write_queue))) __kfree_skb(skb); } static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win) { unsigned int wscale = 0; while (wscale < 14 && (65535 << wscale) < win) wscale++; return wscale; } static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp) { struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp); if (skb) { __skb_put(skb, wrlen); memset(skb->head, 0, wrlen + dlen); } else pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen); return skb; } /* * The number of WRs needed for an skb depends on the number of fragments * in the skb and whether it has any payload in its main body. This maps the * length of the gather list represented by an skb into the # of necessary WRs. * The extra two fragments are for iscsi bhs and payload padding. */ #define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2) static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk) { csk->wr_pending_head = csk->wr_pending_tail = NULL; } static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk, struct sk_buff *skb) { cxgbi_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 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb; csk->wr_pending_tail = skb; } static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk) { int n = 0; const struct sk_buff *skb = csk->wr_pending_head; while (skb) { n += skb->csum; skb = cxgbi_skcb_tx_wr_next(skb); } return n; } static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk) { return csk->wr_pending_head; } static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk) { struct sk_buff *skb = csk->wr_pending_head; if (likely(skb)) { csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb); cxgbi_skcb_tx_wr_next(skb) = NULL; } return skb; } void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *); void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *); void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *); void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int); void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *); void cxgbi_sock_closed(struct cxgbi_sock *); void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int); void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *); void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *); void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32); void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int, int); unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int); void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *); struct cxgbi_hba { struct net_device *ndev; struct net_device *vdev; /* vlan dev */ struct Scsi_Host *shost; struct cxgbi_device *cdev; __be32 ipv4addr; unsigned char port_id; }; struct cxgbi_ports_map { unsigned int max_connect; unsigned int used; unsigned short sport_base; spinlock_t lock; unsigned int next; struct cxgbi_sock **port_csk; }; #define CXGBI_FLAG_DEV_T3 0x1 #define CXGBI_FLAG_DEV_T4 0x2 #define CXGBI_FLAG_ADAPTER_RESET 0x4 #define CXGBI_FLAG_IPV4_SET 0x10 #define CXGBI_FLAG_USE_PPOD_OFLDQ 0x40 #define CXGBI_FLAG_DDP_OFF 0x100 struct cxgbi_device { struct list_head list_head; struct list_head rcu_node; unsigned int flags; struct net_device **ports; void *lldev; struct cxgbi_hba **hbas; const unsigned short *mtus; unsigned char nmtus; unsigned char nports; struct pci_dev *pdev; struct dentry *debugfs_root; struct iscsi_transport *itp; struct module *owner; unsigned int pfvf; unsigned int rx_credit_thres; unsigned int skb_tx_rsvd; unsigned int skb_rx_extra; /* for msg coalesced mode */ unsigned int tx_max_size; unsigned int rx_max_size; unsigned int rxq_idx_cntr; struct cxgbi_ports_map pmap; void (*dev_ddp_cleanup)(struct cxgbi_device *); struct cxgbi_ppm* (*cdev2ppm)(struct cxgbi_device *); int (*csk_ddp_set_map)(struct cxgbi_ppm *, struct cxgbi_sock *, struct cxgbi_task_tag_info *); void (*csk_ddp_clear_map)(struct cxgbi_device *cdev, struct cxgbi_ppm *, struct cxgbi_task_tag_info *); int (*csk_ddp_setup_digest)(struct cxgbi_sock *, unsigned int, int, int); int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *, unsigned int, int); void (*csk_release_offload_resources)(struct cxgbi_sock *); int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *); u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32); int (*csk_push_tx_frames)(struct cxgbi_sock *, int); void (*csk_send_abort_req)(struct cxgbi_sock *); void (*csk_send_close_req)(struct cxgbi_sock *); int (*csk_alloc_cpls)(struct cxgbi_sock *); int (*csk_init_act_open)(struct cxgbi_sock *); void *dd_data; }; #define cxgbi_cdev_priv(cdev) ((cdev)->dd_data) struct cxgbi_conn { struct cxgbi_endpoint *cep; struct iscsi_conn *iconn; struct cxgbi_hba *chba; u32 task_idx_bits; unsigned int ddp_full; unsigned int ddp_tag_full; }; struct cxgbi_endpoint { struct cxgbi_conn *cconn; struct cxgbi_hba *chba; struct cxgbi_sock *csk; }; #define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512) struct cxgbi_task_data { unsigned short nr_frags; struct page_frag frags[MAX_PDU_FRAGS]; struct sk_buff *skb; unsigned int dlen; unsigned int offset; unsigned int count; unsigned int sgoffset; struct cxgbi_task_tag_info ttinfo; }; #define iscsi_task_cxgbi_data(task) \ ((task)->dd_data + sizeof(struct iscsi_tcp_task)) static inline void *cxgbi_alloc_big_mem(unsigned int size, gfp_t gfp) { void *p = kzalloc(size, gfp | __GFP_NOWARN); if (!p) p = vzalloc(size); return p; } static inline void cxgbi_free_big_mem(void *addr) { kvfree(addr); } static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr) { if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET) chba->ipv4addr = ipaddr; else pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n", chba->ndev->name); } struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int); void cxgbi_device_unregister(struct cxgbi_device *); void cxgbi_device_unregister_all(unsigned int flag); struct cxgbi_device *cxgbi_device_find_by_lldev(void *); struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *); struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *, int *); int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int, struct scsi_host_template *, struct scsi_transport_template *); void cxgbi_hbas_remove(struct cxgbi_device *); int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, unsigned int max_conn); void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev); void cxgbi_conn_tx_open(struct cxgbi_sock *); void cxgbi_conn_pdu_ready(struct cxgbi_sock *); int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8); int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int); int cxgbi_conn_xmit_pdu(struct iscsi_task *); void cxgbi_cleanup_task(struct iscsi_task *task); umode_t cxgbi_attr_is_visible(int param_type, int param); void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *); int cxgbi_set_conn_param(struct iscsi_cls_conn *, enum iscsi_param, char *, int); int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *); struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32); int cxgbi_bind_conn(struct iscsi_cls_session *, struct iscsi_cls_conn *, u64, int); void cxgbi_destroy_session(struct iscsi_cls_session *); struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *, u16, u16, u32); int cxgbi_set_host_param(struct Scsi_Host *, enum iscsi_host_param, char *, int); int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *); struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *, struct sockaddr *, int); int cxgbi_ep_poll(struct iscsi_endpoint *, int); void cxgbi_ep_disconnect(struct iscsi_endpoint *); int cxgbi_iscsi_init(struct iscsi_transport *, struct scsi_transport_template **); void cxgbi_iscsi_cleanup(struct iscsi_transport *, struct scsi_transport_template **); void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *); int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int, unsigned int, unsigned int); int cxgbi_ddp_cleanup(struct cxgbi_device *); void cxgbi_ddp_page_size_factor(int *); void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *, struct cxgbi_task_tag_info *, struct scatterlist **sg_pp, unsigned int *sg_off); void cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *, struct cxgbi_tag_format *, unsigned int ppmax, unsigned int llimit, unsigned int start, unsigned int rsvd_factor); #endif /*__LIBCXGBI_H__*/
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