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/*
* Copyright 2014 IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include "cxl.h"
static struct dentry *cxl_debugfs;
void cxl_stop_trace(struct cxl *adapter)
{
int slice;
/* Stop the trace */
cxl_p1_write(adapter, CXL_PSL_TRACE, 0x8000000000000017LL);
/* Stop the slice traces */
spin_lock(&adapter->afu_list_lock);
for (slice = 0; slice < adapter->slices; slice++) {
if (adapter->afu[slice])
cxl_p1n_write(adapter->afu[slice], CXL_PSL_SLICE_TRACE, 0x8000000000000000LL);
}
spin_unlock(&adapter->afu_list_lock);
}
/* Helpers to export CXL mmaped IO registers via debugfs */
static int debugfs_io_u64_get(void *data, u64 *val)
{
*val = in_be64((u64 __iomem *)data);
return 0;
}
static int debugfs_io_u64_set(void *data, u64 val)
{
out_be64((u64 __iomem *)data, val);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set, "0x%016llx\n");
static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode,
struct dentry *parent, u64 __iomem *value)
{
return debugfs_create_file(name, mode, parent, (void __force *)value, &fops_io_x64);
}
int cxl_debugfs_adapter_add(struct cxl *adapter)
{
struct dentry *dir;
char buf[32];
if (!cxl_debugfs)
return -ENODEV;
snprintf(buf, 32, "card%i", adapter->adapter_num);
dir = debugfs_create_dir(buf, cxl_debugfs);
if (IS_ERR(dir))
return PTR_ERR(dir);
adapter->debugfs = dir;
debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1));
debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2));
debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL));
debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE));
return 0;
}
void cxl_debugfs_adapter_remove(struct cxl *adapter)
{
debugfs_remove_recursive(adapter->debugfs);
}
int cxl_debugfs_afu_add(struct cxl_afu *afu)
{
struct dentry *dir;
char buf[32];
if (!afu->adapter->debugfs)
return -ENODEV;
snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice);
dir = debugfs_create_dir(buf, afu->adapter->debugfs);
if (IS_ERR(dir))
return PTR_ERR(dir);
afu->debugfs = dir;
debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
return 0;
}
void cxl_debugfs_afu_remove(struct cxl_afu *afu)
{
debugfs_remove_recursive(afu->debugfs);
}
int __init cxl_debugfs_init(void)
{
struct dentry *ent;
if (!cpu_has_feature(CPU_FTR_HVMODE))
return 0;
ent = debugfs_create_dir("cxl", NULL);
if (IS_ERR(ent))
return PTR_ERR(ent);
cxl_debugfs = ent;
return 0;
}
void cxl_debugfs_exit(void)
{
debugfs_remove_recursive(cxl_debugfs);
}
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