1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 2014 IBM Corp.
4 */
5
6#include <linux/debugfs.h>
7#include <linux/kernel.h>
8#include <linux/slab.h>
9
10#include "cxl.h"
11
12static struct dentry *cxl_debugfs;
13
14/* Helpers to export CXL mmaped IO registers via debugfs */
15static int debugfs_io_u64_get(void *data, u64 *val)
16{
17 *val = in_be64((u64 __iomem *)data);
18 return 0;
19}
20
21static int debugfs_io_u64_set(void *data, u64 val)
22{
23 out_be64((u64 __iomem *)data, val);
24 return 0;
25}
26DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set,
27 "0x%016llx\n");
28
29static void debugfs_create_io_x64(const char *name, umode_t mode,
30 struct dentry *parent, u64 __iomem *value)
31{
32 debugfs_create_file_unsafe(name, mode, parent, data: (void __force *)value,
33 fops: &fops_io_x64);
34}
35
36void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir)
37{
38 debugfs_create_io_x64(name: "fir1", S_IRUSR, parent: dir, value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL9_FIR1));
39 debugfs_create_io_x64(name: "fir_mask", mode: 0400, parent: dir,
40 value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL9_FIR_MASK));
41 debugfs_create_io_x64(name: "fir_cntl", S_IRUSR, parent: dir, value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL9_FIR_CNTL));
42 debugfs_create_io_x64(name: "trace", S_IRUSR | S_IWUSR, parent: dir, value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL9_TRACECFG));
43 debugfs_create_io_x64(name: "debug", mode: 0600, parent: dir,
44 value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL9_DEBUG));
45 debugfs_create_io_x64(name: "xsl-debug", mode: 0600, parent: dir,
46 value: _cxl_p1_addr(cxl: adapter, reg: CXL_XSL9_DBG));
47}
48
49void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir)
50{
51 debugfs_create_io_x64(name: "fir1", S_IRUSR, parent: dir, value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL_FIR1));
52 debugfs_create_io_x64(name: "fir2", S_IRUSR, parent: dir, value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL_FIR2));
53 debugfs_create_io_x64(name: "fir_cntl", S_IRUSR, parent: dir, value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL_FIR_CNTL));
54 debugfs_create_io_x64(name: "trace", S_IRUSR | S_IWUSR, parent: dir, value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL_TRACE));
55}
56
57void cxl_debugfs_adapter_add(struct cxl *adapter)
58{
59 struct dentry *dir;
60 char buf[32];
61
62 if (!cxl_debugfs)
63 return;
64
65 snprintf(buf, size: 32, fmt: "card%i", adapter->adapter_num);
66 dir = debugfs_create_dir(name: buf, parent: cxl_debugfs);
67 adapter->debugfs = dir;
68
69 debugfs_create_io_x64(name: "err_ivte", S_IRUSR, parent: dir, value: _cxl_p1_addr(cxl: adapter, reg: CXL_PSL_ErrIVTE));
70
71 if (adapter->native->sl_ops->debugfs_add_adapter_regs)
72 adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir);
73}
74
75void cxl_debugfs_adapter_remove(struct cxl *adapter)
76{
77 debugfs_remove_recursive(dentry: adapter->debugfs);
78}
79
80void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir)
81{
82 debugfs_create_io_x64(name: "serr", S_IRUSR, parent: dir, value: _cxl_p1n_addr(afu, reg: CXL_PSL_SERR_An));
83}
84
85void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir)
86{
87 debugfs_create_io_x64(name: "sstp0", S_IRUSR, parent: dir, value: _cxl_p2n_addr(afu, reg: CXL_SSTP0_An));
88 debugfs_create_io_x64(name: "sstp1", S_IRUSR, parent: dir, value: _cxl_p2n_addr(afu, reg: CXL_SSTP1_An));
89
90 debugfs_create_io_x64(name: "fir", S_IRUSR, parent: dir, value: _cxl_p1n_addr(afu, reg: CXL_PSL_FIR_SLICE_An));
91 debugfs_create_io_x64(name: "serr", S_IRUSR, parent: dir, value: _cxl_p1n_addr(afu, reg: CXL_PSL_SERR_An));
92 debugfs_create_io_x64(name: "afu_debug", S_IRUSR, parent: dir, value: _cxl_p1n_addr(afu, reg: CXL_AFU_DEBUG_An));
93 debugfs_create_io_x64(name: "trace", S_IRUSR | S_IWUSR, parent: dir, value: _cxl_p1n_addr(afu, reg: CXL_PSL_SLICE_TRACE));
94}
95
96void cxl_debugfs_afu_add(struct cxl_afu *afu)
97{
98 struct dentry *dir;
99 char buf[32];
100
101 if (!afu->adapter->debugfs)
102 return;
103
104 snprintf(buf, size: 32, fmt: "psl%i.%i", afu->adapter->adapter_num, afu->slice);
105 dir = debugfs_create_dir(name: buf, parent: afu->adapter->debugfs);
106 afu->debugfs = dir;
107
108 debugfs_create_io_x64(name: "sr", S_IRUSR, parent: dir, value: _cxl_p1n_addr(afu, reg: CXL_PSL_SR_An));
109 debugfs_create_io_x64(name: "dsisr", S_IRUSR, parent: dir, value: _cxl_p2n_addr(afu, reg: CXL_PSL_DSISR_An));
110 debugfs_create_io_x64(name: "dar", S_IRUSR, parent: dir, value: _cxl_p2n_addr(afu, reg: CXL_PSL_DAR_An));
111
112 debugfs_create_io_x64(name: "err_status", S_IRUSR, parent: dir, value: _cxl_p2n_addr(afu, reg: CXL_PSL_ErrStat_An));
113
114 if (afu->adapter->native->sl_ops->debugfs_add_afu_regs)
115 afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir);
116}
117
118void cxl_debugfs_afu_remove(struct cxl_afu *afu)
119{
120 debugfs_remove_recursive(dentry: afu->debugfs);
121}
122
123void __init cxl_debugfs_init(void)
124{
125 if (!cpu_has_feature(CPU_FTR_HVMODE))
126 return;
127
128 cxl_debugfs = debugfs_create_dir(name: "cxl", NULL);
129}
130
131void cxl_debugfs_exit(void)
132{
133 debugfs_remove_recursive(dentry: cxl_debugfs);
134}
135

source code of linux/drivers/misc/cxl/debugfs.c