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, (void __force *)value,
 33				   &fops_io_x64);
 34}
 35
 36void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir)
 37{
 38	debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1));
 39	debugfs_create_io_x64("fir_mask", 0400, dir,
 40			      _cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK));
 41	debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL));
 42	debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG));
 43	debugfs_create_io_x64("debug", 0600, dir,
 44			      _cxl_p1_addr(adapter, CXL_PSL9_DEBUG));
 45	debugfs_create_io_x64("xsl-debug", 0600, dir,
 46			      _cxl_p1_addr(adapter, CXL_XSL9_DBG));
 47}
 48
 49void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir)
 50{
 51	debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1));
 52	debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2));
 53	debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL));
 54	debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, 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, 32, "card%i", adapter->adapter_num);
 66	dir = debugfs_create_dir(buf, cxl_debugfs);
 67	adapter->debugfs = dir;
 68
 69	debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, 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(adapter->debugfs);
 78}
 79
 80void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir)
 81{
 82	debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, 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("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
 88	debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
 89
 90	debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
 91	debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
 92	debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
 93	debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, 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, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice);
105	dir = debugfs_create_dir(buf, afu->adapter->debugfs);
106	afu->debugfs = dir;
107
108	debugfs_create_io_x64("sr",         S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
109	debugfs_create_io_x64("dsisr",      S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
110	debugfs_create_io_x64("dar",        S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
111
112	debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, 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(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("cxl", NULL);
129}
130
131void cxl_debugfs_exit(void)
132{
133	debugfs_remove_recursive(cxl_debugfs);
134}