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/*
* Copyright (c) 2005-2009 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.
*/
/**
* hal_sgpg.h BFA SG page module
*/
#ifndef __BFA_SGPG_PRIV_H__
#define __BFA_SGPG_PRIV_H__
#include <cs/bfa_q.h>
#define BFA_SGPG_MIN (16)
/**
* 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)
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 bfa_sgpg_s *hsgpg_arr; /* BFA SG page array */
struct bfi_sgpg_s *sgpg_arr; /* actual SG page array */
u64 sgpg_arr_pa; /* SG page array DMA addr */
struct list_head sgpg_q; /* queue of free SG pages */
struct list_head sgpg_wait_q; /* wait queue for SG pages */
};
#define BFA_SGPG_MOD(__bfa) (&(__bfa)->modules.sgpg_mod)
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);
#endif /* __BFA_SGPG_PRIV_H__ */
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