1/*
  2 * Copyright 2014 IBM Corp.
  3 *
  4 * This program is free software; you can redistribute it and/or
  5 * modify it under the terms of the GNU General Public License
  6 * as published by the Free Software Foundation; either version
  7 * 2 of the License, or (at your option) any later version.
  8 */
  9
 10#include <linux/debugfs.h>
 11#include <linux/kernel.h>
 12#include <linux/slab.h>
 13
 14#include "cxl.h"
 15
 16static struct dentry *cxl_debugfs;
 17
 18/* Helpers to export CXL mmaped IO registers via debugfs */
 19static int debugfs_io_u64_get(void *data, u64 *val)
 20{
 21	*val = in_be64((u64 __iomem *)data);
 22	return 0;
 23}
 24
 25static int debugfs_io_u64_set(void *data, u64 val)
 26{
 27	out_be64((u64 __iomem *)data, val);
 28	return 0;
 29}
 30DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set,
 31			 "0x%016llx\n");
 32
 33static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode,
 34					    struct dentry *parent, u64 __iomem *value)
 35{
 36	return debugfs_create_file_unsafe(name, mode, parent,
 37					  (void __force *)value, &fops_io_x64);
 38}
 39
 40void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir)
 41{
 42	debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1));
 43	debugfs_create_io_x64("fir_mask", 0400, dir,
 44			      _cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK));
 45	debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL));
 46	debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG));
 47	debugfs_create_io_x64("debug", 0600, dir,
 48			      _cxl_p1_addr(adapter, CXL_PSL9_DEBUG));
 49	debugfs_create_io_x64("xsl-debug", 0600, dir,
 50			      _cxl_p1_addr(adapter, CXL_XSL9_DBG));
 51}
 52
 53void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir)
 54{
 55	debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1));
 56	debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2));
 57	debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL));
 58	debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE));
 59}
 60
 61void cxl_debugfs_add_adapter_regs_xsl(struct cxl *adapter, struct dentry *dir)
 62{
 63	debugfs_create_io_x64("fec", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_XSL_FEC));
 64}
 65
 66int cxl_debugfs_adapter_add(struct cxl *adapter)
 67{
 68	struct dentry *dir;
 69	char buf[32];
 70
 71	if (!cxl_debugfs)
 72		return -ENODEV;
 73
 74	snprintf(buf, 32, "card%i", adapter->adapter_num);
 75	dir = debugfs_create_dir(buf, cxl_debugfs);
 76	if (IS_ERR(dir))
 77		return PTR_ERR(dir);
 78	adapter->debugfs = dir;
 79
 80	debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
 81
 82	if (adapter->native->sl_ops->debugfs_add_adapter_regs)
 83		adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir);
 84	return 0;
 85}
 86
 87void cxl_debugfs_adapter_remove(struct cxl *adapter)
 88{
 89	debugfs_remove_recursive(adapter->debugfs);
 90}
 91
 92void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir)
 93{
 94	debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
 95}
 96
 97void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir)
 98{
 99	debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
100	debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
101
102	debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
103	debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
104	debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
105	debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
106}
107
108int cxl_debugfs_afu_add(struct cxl_afu *afu)
109{
110	struct dentry *dir;
111	char buf[32];
112
113	if (!afu->adapter->debugfs)
114		return -ENODEV;
115
116	snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice);
117	dir = debugfs_create_dir(buf, afu->adapter->debugfs);
118	if (IS_ERR(dir))
119		return PTR_ERR(dir);
120	afu->debugfs = dir;
121
122	debugfs_create_io_x64("sr",         S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
123	debugfs_create_io_x64("dsisr",      S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
124	debugfs_create_io_x64("dar",        S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
125
126	debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
127
128	if (afu->adapter->native->sl_ops->debugfs_add_afu_regs)
129		afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir);
130
131	return 0;
132}
133
134void cxl_debugfs_afu_remove(struct cxl_afu *afu)
135{
136	debugfs_remove_recursive(afu->debugfs);
137}
138
139int __init cxl_debugfs_init(void)
140{
141	struct dentry *ent;
142
143	if (!cpu_has_feature(CPU_FTR_HVMODE))
144		return 0;
145
146	ent = debugfs_create_dir("cxl", NULL);
147	if (IS_ERR(ent))
148		return PTR_ERR(ent);
149	cxl_debugfs = ent;
150
151	return 0;
152}
153
154void cxl_debugfs_exit(void)
155{
156	debugfs_remove_recursive(cxl_debugfs);
157}