1 /*
2  * Huawei HiNIC PCI Express Linux driver
3  * Copyright(c) 2017 Huawei Technologies Co., Ltd
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms and conditions of the GNU General Public License,
7  * version 2, as published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * for more details.
13  *
14  */
15 
16 #ifndef HINIC_HW_IO_H
17 #define HINIC_HW_IO_H
18 
19 #include <linux/types.h>
20 #include <linux/pci.h>
21 #include <linux/semaphore.h>
22 #include <linux/sizes.h>
23 
24 #include "hinic_hw_if.h"
25 #include "hinic_hw_wq.h"
26 #include "hinic_hw_cmdq.h"
27 #include "hinic_hw_qp.h"
28 
29 #define HINIC_DB_PAGE_SIZE      SZ_4K
30 #define HINIC_DB_SIZE           SZ_4M
31 
32 #define HINIC_DB_MAX_AREAS      (HINIC_DB_SIZE / HINIC_DB_PAGE_SIZE)
33 
34 struct hinic_free_db_area {
35 	int             db_idx[HINIC_DB_MAX_AREAS];
36 
37 	int             alloc_pos;
38 	int             return_pos;
39 
40 	int             num_free;
41 
42 	/* Lock for getting db area */
43 	struct semaphore        idx_lock;
44 };
45 
46 struct hinic_func_to_io {
47 	struct hinic_hwif       *hwif;
48 
49 	struct hinic_wqs        wqs;
50 
51 	struct hinic_wq         *sq_wq;
52 	struct hinic_wq         *rq_wq;
53 
54 	struct hinic_qp         *qps;
55 	u16                     max_qps;
56 
57 	void __iomem            **sq_db;
58 	void __iomem            *db_base;
59 
60 	void                    *ci_addr_base;
61 	dma_addr_t              ci_dma_base;
62 
63 	struct hinic_free_db_area       free_db_area;
64 
65 	void __iomem                    *cmdq_db_area[HINIC_MAX_CMDQ_TYPES];
66 
67 	struct hinic_cmdqs              cmdqs;
68 };
69 
70 int hinic_io_create_qps(struct hinic_func_to_io *func_to_io,
71 			u16 base_qpn, int num_qps,
72 			struct msix_entry *sq_msix_entries,
73 			struct msix_entry *rq_msix_entries);
74 
75 void hinic_io_destroy_qps(struct hinic_func_to_io *func_to_io,
76 			  int num_qps);
77 
78 int hinic_io_init(struct hinic_func_to_io *func_to_io,
79 		  struct hinic_hwif *hwif, u16 max_qps, int num_ceqs,
80 		  struct msix_entry *ceq_msix_entries);
81 
82 void hinic_io_free(struct hinic_func_to_io *func_to_io);
83 
84 #endif
85