1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* Huawei HiNIC PCI Express Linux driver
* Copyright(c) 2017 Huawei Technologies Co., Ltd
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
*/
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/types.h>
#include <linux/bitops.h>
#include "hinic_hw_csr.h"
#include "hinic_hw_if.h"
#define PCIE_ATTR_ENTRY 0
/**
* hwif_ready - test if the HW is ready for use
* @hwif: the HW interface of a pci function device
*
* Return 0 - Success, negative - Failure
**/
static int hwif_ready(struct hinic_hwif *hwif)
{
struct pci_dev *pdev = hwif->pdev;
u32 addr, attr1;
addr = HINIC_CSR_FUNC_ATTR1_ADDR;
attr1 = hinic_hwif_read_reg(hwif, addr);
if (!HINIC_FA1_GET(attr1, INIT_STATUS)) {
dev_err(&pdev->dev, "hwif status is not ready\n");
return -EFAULT;
}
return 0;
}
/**
* set_hwif_attr - set the attributes in the relevant members in hwif
* @hwif: the HW interface of a pci function device
* @attr0: the first attribute that was read from the hw
* @attr1: the second attribute that was read from the hw
**/
static void set_hwif_attr(struct hinic_hwif *hwif, u32 attr0, u32 attr1)
{
hwif->attr.func_idx = HINIC_FA0_GET(attr0, FUNC_IDX);
hwif->attr.pf_idx = HINIC_FA0_GET(attr0, PF_IDX);
hwif->attr.pci_intf_idx = HINIC_FA0_GET(attr0, PCI_INTF_IDX);
hwif->attr.func_type = HINIC_FA0_GET(attr0, FUNC_TYPE);
hwif->attr.num_aeqs = BIT(HINIC_FA1_GET(attr1, AEQS_PER_FUNC));
hwif->attr.num_ceqs = BIT(HINIC_FA1_GET(attr1, CEQS_PER_FUNC));
hwif->attr.num_irqs = BIT(HINIC_FA1_GET(attr1, IRQS_PER_FUNC));
hwif->attr.num_dma_attr = BIT(HINIC_FA1_GET(attr1, DMA_ATTR_PER_FUNC));
}
/**
* read_hwif_attr - read the attributes and set members in hwif
* @hwif: the HW interface of a pci function device
**/
static void read_hwif_attr(struct hinic_hwif *hwif)
{
u32 addr, attr0, attr1;
addr = HINIC_CSR_FUNC_ATTR0_ADDR;
attr0 = hinic_hwif_read_reg(hwif, addr);
addr = HINIC_CSR_FUNC_ATTR1_ADDR;
attr1 = hinic_hwif_read_reg(hwif, addr);
set_hwif_attr(hwif, attr0, attr1);
}
/**
* set_ppf - try to set hwif as ppf and set the type of hwif in this case
* @hwif: the HW interface of a pci function device
**/
static void set_ppf(struct hinic_hwif *hwif)
{
struct hinic_func_attr *attr = &hwif->attr;
u32 addr, val, ppf_election;
/* Read Modify Write */
addr = HINIC_CSR_PPF_ELECTION_ADDR(HINIC_HWIF_PCI_INTF(hwif));
val = hinic_hwif_read_reg(hwif, addr);
val = HINIC_PPF_ELECTION_CLEAR(val, IDX);
ppf_election = HINIC_PPF_ELECTION_SET(HINIC_HWIF_FUNC_IDX(hwif), IDX);
val |= ppf_election;
hinic_hwif_write_reg(hwif, addr, val);
/* check PPF */
val = hinic_hwif_read_reg(hwif, addr);
attr->ppf_idx = HINIC_PPF_ELECTION_GET(val, IDX);
if (attr->ppf_idx == HINIC_HWIF_FUNC_IDX(hwif))
attr->func_type = HINIC_PPF;
}
/**
* set_dma_attr - set the dma attributes in the HW
* @hwif: the HW interface of a pci function device
* @entry_idx: the entry index in the dma table
* @st: PCIE TLP steering tag
* @at: PCIE TLP AT field
* @ph: PCIE TLP Processing Hint field
* @no_snooping: PCIE TLP No snooping
* @tph_en: PCIE TLP Processing Hint Enable
**/
static void set_dma_attr(struct hinic_hwif *hwif, u32 entry_idx,
u8 st, u8 at, u8 ph,
enum hinic_pcie_nosnoop no_snooping,
enum hinic_pcie_tph tph_en)
{
u32 addr, val, dma_attr_entry;
/* Read Modify Write */
addr = HINIC_CSR_DMA_ATTR_ADDR(entry_idx);
val = hinic_hwif_read_reg(hwif, addr);
val = HINIC_DMA_ATTR_CLEAR(val, ST) &
HINIC_DMA_ATTR_CLEAR(val, AT) &
HINIC_DMA_ATTR_CLEAR(val, PH) &
HINIC_DMA_ATTR_CLEAR(val, NO_SNOOPING) &
HINIC_DMA_ATTR_CLEAR(val, TPH_EN);
dma_attr_entry = HINIC_DMA_ATTR_SET(st, ST) |
HINIC_DMA_ATTR_SET(at, AT) |
HINIC_DMA_ATTR_SET(ph, PH) |
HINIC_DMA_ATTR_SET(no_snooping, NO_SNOOPING) |
HINIC_DMA_ATTR_SET(tph_en, TPH_EN);
val |= dma_attr_entry;
hinic_hwif_write_reg(hwif, addr, val);
}
/**
* dma_attr_table_init - initialize the the default dma attributes
* @hwif: the HW interface of a pci function device
**/
static void dma_attr_init(struct hinic_hwif *hwif)
{
set_dma_attr(hwif, PCIE_ATTR_ENTRY, HINIC_PCIE_ST_DISABLE,
HINIC_PCIE_AT_DISABLE, HINIC_PCIE_PH_DISABLE,
HINIC_PCIE_SNOOP, HINIC_PCIE_TPH_DISABLE);
}
/**
* hinic_init_hwif - initialize the hw interface
* @hwif: the HW interface of a pci function device
* @pdev: the pci device for acessing PCI resources
*
* Return 0 - Success, negative - Failure
**/
int hinic_init_hwif(struct hinic_hwif *hwif, struct pci_dev *pdev)
{
int err;
hwif->pdev = pdev;
hwif->cfg_regs_bar = pci_ioremap_bar(pdev, HINIC_PCI_CFG_REGS_BAR);
if (!hwif->cfg_regs_bar) {
dev_err(&pdev->dev, "Failed to map configuration regs\n");
return -ENOMEM;
}
err = hwif_ready(hwif);
if (err) {
dev_err(&pdev->dev, "HW interface is not ready\n");
goto err_hwif_ready;
}
read_hwif_attr(hwif);
if (HINIC_IS_PF(hwif))
set_ppf(hwif);
/* No transactionss before DMA is initialized */
dma_attr_init(hwif);
return 0;
err_hwif_ready:
iounmap(hwif->cfg_regs_bar);
return err;
}
/**
* hinic_free_hwif - free the HW interface
* @hwif: the HW interface of a pci function device
**/
void hinic_free_hwif(struct hinic_hwif *hwif)
{
iounmap(hwif->cfg_regs_bar);
}
|
