1/* 2 * Copyright (c) 2005-2009 Brocade Communications Systems, Inc. 3 * All rights reserved 4 * www.brocade.com 5 * 6 * Linux driver for Brocade Fibre Channel Host Bus Adapter. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License (GPL) Version 2 as 10 * published by the Free Software Foundation 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 */ 17 18/** 19 * hal_sgpg.h BFA SG page module 20 */ 21 22#ifndef __BFA_SGPG_PRIV_H__ 23#define __BFA_SGPG_PRIV_H__ 24 25#include <cs/bfa_q.h> 26 27#define BFA_SGPG_MIN (16) 28 29/** 30 * Alignment macro for SG page allocation 31 */ 32#define BFA_SGPG_ROUNDUP(_l) (((_l) + (sizeof(struct bfi_sgpg_s) - 1)) \ 33 & ~(sizeof(struct bfi_sgpg_s) - 1)) 34 35struct bfa_sgpg_wqe_s { 36 struct list_head qe; /* queue sg page element */ 37 int nsgpg; /* pages to be allocated */ 38 int nsgpg_total; /* total pages required */ 39 void (*cbfn) (void *cbarg); 40 /* callback function */ 41 void *cbarg; /* callback arg */ 42 struct list_head sgpg_q; /* queue of alloced sgpgs */ 43}; 44 45struct bfa_sgpg_s { 46 struct list_head qe; /* queue sg page element */ 47 struct bfi_sgpg_s *sgpg; /* va of SG page */ 48 union bfi_addr_u sgpg_pa;/* pa of SG page */ 49}; 50 51/** 52 * Given number of SG elements, BFA_SGPG_NPAGE() returns the number of 53 * SG pages required. 54 */ 55#define BFA_SGPG_NPAGE(_nsges) (((_nsges) / BFI_SGPG_DATA_SGES) + 1) 56 57struct bfa_sgpg_mod_s { 58 struct bfa_s *bfa; 59 int num_sgpgs; /* number of SG pages */ 60 int free_sgpgs; /* number of free SG pages */ 61 struct bfa_sgpg_s *hsgpg_arr; /* BFA SG page array */ 62 struct bfi_sgpg_s *sgpg_arr; /* actual SG page array */ 63 u64 sgpg_arr_pa; /* SG page array DMA addr */ 64 struct list_head sgpg_q; /* queue of free SG pages */ 65 struct list_head sgpg_wait_q; /* wait queue for SG pages */ 66}; 67#define BFA_SGPG_MOD(__bfa) (&(__bfa)->modules.sgpg_mod) 68 69bfa_status_t bfa_sgpg_malloc(struct bfa_s *bfa, struct list_head *sgpg_q, 70 int nsgpgs); 71void bfa_sgpg_mfree(struct bfa_s *bfa, struct list_head *sgpg_q, 72 int nsgpgs); 73void bfa_sgpg_winit(struct bfa_sgpg_wqe_s *wqe, 74 void (*cbfn) (void *cbarg), void *cbarg); 75void bfa_sgpg_wait(struct bfa_s *bfa, struct bfa_sgpg_wqe_s *wqe, 76 int nsgpgs); 77void bfa_sgpg_wcancel(struct bfa_s *bfa, struct bfa_sgpg_wqe_s *wqe); 78 79#endif /* __BFA_SGPG_PRIV_H__ */ 80