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80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
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/*
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* Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*
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* Linux driver for Brocade Fibre Channel Host Bus Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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/**
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* hal_sgpg.h BFA SG page module
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*/
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#ifndef __BFA_SGPG_PRIV_H__
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#define __BFA_SGPG_PRIV_H__
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#include <cs/bfa_q.h>
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#define BFA_SGPG_MIN (16)
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/**
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* Alignment macro for SG page allocation
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*/
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#define BFA_SGPG_ROUNDUP(_l) (((_l) + (sizeof(struct bfi_sgpg_s) - 1)) \
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& ~(sizeof(struct bfi_sgpg_s) - 1))
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struct bfa_sgpg_wqe_s {
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struct list_head qe; /* queue sg page element */
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int nsgpg; /* pages to be allocated */
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int nsgpg_total; /* total pages required */
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void (*cbfn) (void *cbarg);
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/* callback function */
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void *cbarg; /* callback arg */
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struct list_head sgpg_q; /* queue of alloced sgpgs */
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};
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struct bfa_sgpg_s {
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struct list_head qe; /* queue sg page element */
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struct bfi_sgpg_s *sgpg; /* va of SG page */
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union bfi_addr_u sgpg_pa;/* pa of SG page */
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};
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/**
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* Given number of SG elements, BFA_SGPG_NPAGE() returns the number of
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* SG pages required.
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*/
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#define BFA_SGPG_NPAGE(_nsges) (((_nsges) / BFI_SGPG_DATA_SGES) + 1)
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struct bfa_sgpg_mod_s {
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struct bfa_s *bfa;
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int num_sgpgs; /* number of SG pages */
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int free_sgpgs; /* number of free SG pages */
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struct bfa_sgpg_s *hsgpg_arr; /* BFA SG page array */
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struct bfi_sgpg_s *sgpg_arr; /* actual SG page array */
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u64 sgpg_arr_pa; /* SG page array DMA addr */
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struct list_head sgpg_q; /* queue of free SG pages */
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struct list_head sgpg_wait_q; /* wait queue for SG pages */
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};
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#define BFA_SGPG_MOD(__bfa) (&(__bfa)->modules.sgpg_mod)
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bfa_status_t bfa_sgpg_malloc(struct bfa_s *bfa, struct list_head *sgpg_q,
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int nsgpgs);
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void bfa_sgpg_mfree(struct bfa_s *bfa, struct list_head *sgpg_q,
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int nsgpgs);
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void bfa_sgpg_winit(struct bfa_sgpg_wqe_s *wqe,
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void (*cbfn) (void *cbarg), void *cbarg);
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void bfa_sgpg_wait(struct bfa_s *bfa, struct bfa_sgpg_wqe_s *wqe,
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int nsgpgs);
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void bfa_sgpg_wcancel(struct bfa_s *bfa, struct bfa_sgpg_wqe_s *wqe);
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#endif /* __BFA_SGPG_PRIV_H__ */
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