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7725ccfd JH |
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__ */ |