1 // SPDX-License-Identifier: GPL-2.0
2 /* Marvell OcteonTx2 RVU Admin Function driver
3  *
4  * Copyright (C) 2018 Marvell International Ltd.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10 
11 #include <linux/module.h>
12 #include <linux/pci.h>
13 
14 #include "rvu_struct.h"
15 #include "common.h"
16 #include "mbox.h"
17 #include "rvu.h"
18 
19 struct reg_range {
20 	u64  start;
21 	u64  end;
22 };
23 
24 struct hw_reg_map {
25 	u8	regblk;
26 	u8	num_ranges;
27 	u64	mask;
28 #define	 MAX_REG_RANGES	8
29 	struct reg_range range[MAX_REG_RANGES];
30 };
31 
32 static struct hw_reg_map txsch_reg_map[NIX_TXSCH_LVL_CNT] = {
33 	{NIX_TXSCH_LVL_SMQ, 2, 0xFFFF, {{0x0700, 0x0708}, {0x1400, 0x14C8} } },
34 	{NIX_TXSCH_LVL_TL4, 3, 0xFFFF, {{0x0B00, 0x0B08}, {0x0B10, 0x0B18},
35 			      {0x1200, 0x12E0} } },
36 	{NIX_TXSCH_LVL_TL3, 3, 0xFFFF, {{0x1000, 0x10E0}, {0x1600, 0x1608},
37 			      {0x1610, 0x1618} } },
38 	{NIX_TXSCH_LVL_TL2, 2, 0xFFFF, {{0x0E00, 0x0EE0}, {0x1700, 0x1768} } },
39 	{NIX_TXSCH_LVL_TL1, 1, 0xFFFF, {{0x0C00, 0x0D98} } },
40 };
41 
42 bool rvu_check_valid_reg(int regmap, int regblk, u64 reg)
43 {
44 	int idx;
45 	struct hw_reg_map *map;
46 
47 	/* Only 64bit offsets */
48 	if (reg & 0x07)
49 		return false;
50 
51 	if (regmap == TXSCHQ_HWREGMAP) {
52 		if (regblk >= NIX_TXSCH_LVL_CNT)
53 			return false;
54 		map = &txsch_reg_map[regblk];
55 	} else {
56 		return false;
57 	}
58 
59 	/* Should never happen */
60 	if (map->regblk != regblk)
61 		return false;
62 
63 	reg &= map->mask;
64 
65 	for (idx = 0; idx < map->num_ranges; idx++) {
66 		if (reg >= map->range[idx].start &&
67 		    reg < map->range[idx].end)
68 			return true;
69 	}
70 	return false;
71 }
72