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/*
* Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
* All rights reserved
* www.brocade.com
*
* Linux driver for Brocade Fibre Channel Host Bus Adapter.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) Version 2 as
* published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef __BFA_SVC_H__
#define __BFA_SVC_H__
#include "bfa_cs.h"
#include "bfi_ms.h"
/*
* Scatter-gather DMA related defines
*/
#define BFA_SGPG_MIN (16)
#define BFA_SGPG_MAX (8192)
/*
* Alignment macro for SG page allocation
*/
#define BFA_SGPG_ROUNDUP(_l) (((_l) + (sizeof(struct bfi_sgpg_s) - 1)) \
& ~(sizeof(struct bfi_sgpg_s) - 1))
struct bfa_sgpg_wqe_s {
struct list_head qe; /* queue sg page element */
int nsgpg; /* pages to be allocated */
int nsgpg_total; /* total pages required */
void (*cbfn) (void *cbarg); /* callback function */
void *cbarg; /* callback arg */
struct list_head sgpg_q; /* queue of alloced sgpgs */
};
struct bfa_sgpg_s {
struct list_head qe; /* queue sg page element */
struct bfi_sgpg_s *sgpg; /* va of SG page */
union bfi_addr_u sgpg_pa; /* pa of SG page */
};
/*
* Given number of SG elements, BFA_SGPG_NPAGE() returns the number of
* SG pages required.
*/
#define BFA_SGPG_NPAGE(_nsges) (((_nsges) / BFI_SGPG_DATA_SGES) + 1)
/* Max SGPG dma segs required */
#define BFA_SGPG_DMA_SEGS \
BFI_MEM_DMA_NSEGS(BFA_SGPG_MAX, (uint32_t)sizeof(struct bfi_sgpg_s))
struct bfa_sgpg_mod_s {
struct bfa_s *bfa;
int num_sgpgs; /* number of SG pages */
int free_sgpgs; /* number of free SG pages */
struct list_head sgpg_q; /* queue of free SG pages */
struct list_head sgpg_wait_q; /* wait queue for SG pages */
struct bfa_mem_dma_s dma_seg[BFA_SGPG_DMA_SEGS];
struct bfa_mem_kva_s kva_seg;
};
#define BFA_SGPG_MOD(__bfa) (&(__bfa)->modules.sgpg_mod)
#define BFA_MEM_SGPG_KVA(__bfa) (&(BFA_SGPG_MOD(__bfa)->kva_seg))
bfa_status_t bfa_sgpg_malloc(struct bfa_s *bfa, struct list_head *sgpg_q,
int nsgpgs);
void bfa_sgpg_mfree(struct bfa_s *bfa, struct list_head *sgpg_q, int nsgpgs);
void bfa_sgpg_winit(struct bfa_sgpg_wqe_s *wqe,
void (*cbfn) (void *cbarg), void *cbarg);
void bfa_sgpg_wait(struct bfa_s *bfa, struct bfa_sgpg_wqe_s *wqe, int nsgpgs);
void bfa_sgpg_wcancel(struct bfa_s *bfa, struct bfa_sgpg_wqe_s *wqe);
/*
* FCXP related defines
*/
#define BFA_FCXP_MIN (1)
#define BFA_FCXP_MAX (256)
#define BFA_FCXP_MAX_IBUF_SZ (2 * 1024 + 256)
#define BFA_FCXP_MAX_LBUF_SZ (4 * 1024 + 256)
/* Max FCXP dma segs required */
#define BFA_FCXP_DMA_SEGS \
BFI_MEM_DMA_NSEGS(BFA_FCXP_MAX, \
(u32)BFA_FCXP_MAX_IBUF_SZ + BFA_FCXP_MAX_LBUF_SZ)
struct bfa_fcxp_mod_s {
struct bfa_s *bfa; /* backpointer to BFA */
struct bfa_fcxp_s *fcxp_list; /* array of FCXPs */
u16 num_fcxps; /* max num FCXP requests */
struct list_head fcxp_req_free_q; /* free FCXPs used for sending req */
struct list_head fcxp_rsp_free_q; /* free FCXPs used for sending req */
struct list_head fcxp_active_q; /* active FCXPs */
struct list_head req_wait_q; /* wait queue for free req_fcxp */
struct list_head rsp_wait_q; /* wait queue for free rsp_fcxp */
struct list_head fcxp_req_unused_q; /* unused req_fcxps */
struct list_head fcxp_rsp_unused_q; /* unused rsp_fcxps */
u32 req_pld_sz;
u32 rsp_pld_sz;
struct bfa_mem_dma_s dma_seg[BFA_FCXP_DMA_SEGS];
struct bfa_mem_kva_s kva_seg;
};
#define BFA_FCXP_MOD(__bfa) (&(__bfa)->modules.fcxp_mod)
#define BFA_FCXP_FROM_TAG(__mod, __tag) (&(__mod)->fcxp_list[__tag])
#define BFA_MEM_FCXP_KVA(__bfa) (&(BFA_FCXP_MOD(__bfa)->kva_seg))
typedef void (*fcxp_send_cb_t) (struct bfa_s *ioc, struct bfa_fcxp_s *fcxp,
void *cb_arg, bfa_status_t req_status,
u32 rsp_len, u32 resid_len,
struct fchs_s *rsp_fchs);
typedef u64 (*bfa_fcxp_get_sgaddr_t) (void *bfad_fcxp, int sgeid);
typedef u32 (*bfa_fcxp_get_sglen_t) (void *bfad_fcxp, int sgeid);
typedef void (*bfa_cb_fcxp_send_t) (void *bfad_fcxp, struct bfa_fcxp_s *fcxp,
void *cbarg, enum bfa_status req_status,
u32 rsp_len, u32 resid_len,
struct fchs_s *rsp_fchs);
typedef void (*bfa_fcxp_alloc_cbfn_t) (void *cbarg, struct bfa_fcxp_s *fcxp);
/*
* Information needed for a FCXP request
*/
struct bfa_fcxp_req_info_s {
struct bfa_rport_s *bfa_rport;
/* Pointer to the bfa rport that was
* returned from bfa_rport_create().
* This could be left NULL for WKA or
* for FCXP interactions before the
* rport nexus is established
*/
struct fchs_s fchs; /* request FC header structure */
u8 cts; /* continuous sequence */
u8 class; /* FC class for the request/response */
u16 max_frmsz; /* max send frame size */
u16 vf_id; /* vsan tag if applicable */
u8 lp_tag; /* lport tag */
u32 req_tot_len; /* request payload total length */
};
struct bfa_fcxp_rsp_info_s {
struct fchs_s rsp_fchs;
/* Response frame's FC header will
* be sent back in this field */
u8 rsp_timeout;
/* timeout in seconds, 0-no response */
u8 rsvd2[3];
u32 rsp_maxlen; /* max response length expected */
};
struct bfa_fcxp_s {
struct list_head qe; /* fcxp queue element */
bfa_sm_t sm; /* state machine */
void *caller; /* driver or fcs */
struct bfa_fcxp_mod_s *fcxp_mod;
/* back pointer to fcxp mod */
u16 fcxp_tag; /* internal tag */
struct bfa_fcxp_req_info_s req_info;
/* request info */
struct bfa_fcxp_rsp_info_s rsp_info;
/* response info */
u8 use_ireqbuf; /* use internal req buf */
u8 use_irspbuf; /* use internal rsp buf */
u32 nreq_sgles; /* num request SGLEs */
u32 nrsp_sgles; /* num response SGLEs */
struct list_head req_sgpg_q; /* SG pages for request buf */
struct list_head req_sgpg_wqe; /* wait queue for req SG page */
struct list_head rsp_sgpg_q; /* SG pages for response buf */
struct list_head rsp_sgpg_wqe; /* wait queue for rsp SG page */
bfa_fcxp_get_sgaddr_t req_sga_cbfn;
/* SG elem addr user function */
bfa_fcxp_get_sglen_t req_sglen_cbfn;
/* SG elem len user function */
bfa_fcxp_get_sgaddr_t rsp_sga_cbfn;
/* SG elem addr user function */
bfa_fcxp_get_sglen_t rsp_sglen_cbfn;
/* SG elem len user function */
bfa_cb_fcxp_send_t send_cbfn; /* send completion callback */
void *send_cbarg; /* callback arg */
struct bfa_sge_s req_sge[BFA_FCXP_MAX_SGES];
/* req SG elems */
struct bfa_sge_s rsp_sge[BFA_FCXP_MAX_SGES];
/* rsp SG elems */
u8 rsp_status; /* comp: rsp status */
u32 rsp_len; /* comp: actual response len */
u32 residue_len; /* comp: residual rsp length */
struct fchs_s rsp_fchs; /* comp: response fchs */
struct bfa_cb_qe_s hcb_qe; /* comp: callback qelem */
struct bfa_reqq_wait_s reqq_wqe;
bfa_boolean_t reqq_waiting;
bfa_boolean_t req_rsp; /* Used to track req/rsp fcxp */
};
struct bfa_fcxp_wqe_s {
struct list_head qe;
bfa_fcxp_alloc_cbfn_t alloc_cbfn;
void *alloc_cbarg;
void *caller;
struct bfa_s *bfa;
int
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