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 | |
12 | static struct dentry *cxl_debugfs; |
13 | |
14 | /* Helpers to export CXL mmaped IO registers via debugfs */ |
15 | static int debugfs_io_u64_get(void *data, u64 *val) |
16 | { |
17 | *val = in_be64((u64 __iomem *)data); |
18 | return 0; |
19 | } |
20 | |
21 | static int debugfs_io_u64_set(void *data, u64 val) |
22 | { |
23 | out_be64((u64 __iomem *)data, val); |
24 | return 0; |
25 | } |
26 | DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set, |
27 | "0x%016llx\n" ); |
28 | |
29 | static 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 | |
36 | void 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 | |
49 | void 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 | |
57 | void 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 | |
75 | void cxl_debugfs_adapter_remove(struct cxl *adapter) |
76 | { |
77 | debugfs_remove_recursive(dentry: adapter->debugfs); |
78 | } |
79 | |
80 | void 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 | |
85 | void 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 | |
96 | void 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 | |
118 | void cxl_debugfs_afu_remove(struct cxl_afu *afu) |
119 | { |
120 | debugfs_remove_recursive(dentry: afu->debugfs); |
121 | } |
122 | |
123 | void __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 | |
131 | void cxl_debugfs_exit(void) |
132 | { |
133 | debugfs_remove_recursive(dentry: cxl_debugfs); |
134 | } |
135 | |