| Jing Huang | 7725ccf | 2009-09-23 17:46:15 -0700 | [diff] [blame] | 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 | |
| 35 | struct 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 | |
| 45 | struct 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 | |
| 57 | struct 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 | |
| 69 | bfa_status_t bfa_sgpg_malloc(struct bfa_s *bfa, struct list_head *sgpg_q, |
| 70 | int nsgpgs); |
| 71 | void bfa_sgpg_mfree(struct bfa_s *bfa, struct list_head *sgpg_q, |
| 72 | int nsgpgs); |
| 73 | void bfa_sgpg_winit(struct bfa_sgpg_wqe_s *wqe, |
| 74 | void (*cbfn) (void *cbarg), void *cbarg); |
| 75 | void bfa_sgpg_wait(struct bfa_s *bfa, struct bfa_sgpg_wqe_s *wqe, |
| 76 | int nsgpgs); |
| 77 | void bfa_sgpg_wcancel(struct bfa_s *bfa, struct bfa_sgpg_wqe_s *wqe); |
| 78 | |
| 79 | #endif /* __BFA_SGPG_PRIV_H__ */ |