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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2016-17 IBM Corp.
*/
#define pr_fmt(fmt) "vas: " fmt
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include "vas.h"
static struct dentry *vas_debugfs;
static char *cop_to_str(int cop)
{
switch (cop) {
case VAS_COP_TYPE_FAULT: return "Fault";
case VAS_COP_TYPE_842: return "NX-842 Normal Priority";
case VAS_COP_TYPE_842_HIPRI: return "NX-842 High Priority";
case VAS_COP_TYPE_GZIP: return "NX-GZIP Normal Priority";
case VAS_COP_TYPE_GZIP_HIPRI: return "NX-GZIP High Priority";
case VAS_COP_TYPE_FTW: return "Fast Thread-wakeup";
default: return "Unknown";
}
}
static int info_show(struct seq_file *s, void *private)
{
struct vas_window *window = s->private;
mutex_lock(&vas_mutex);
/* ensure window is not unmapped */
if (!window->hvwc_map)
goto unlock;
seq_printf(s, "Type: %s, %s\n", cop_to_str(window->cop),
window->tx_win ? "Send" : "Receive");
seq_printf(s, "Pid : %d\n", window->pid);
unlock:
mutex_unlock(&vas_mutex);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(info);
static inline void print_reg(struct seq_file *s, struct vas_window *win,
char *name, u32 reg)
{
seq_printf(s, "0x%016llx %s\n", read_hvwc_reg(win, name, reg), name);
}
static int hvwc_show(struct seq_file *s, void *private)
{
struct vas_window *window = s->private;
mutex_lock(&vas_mutex);
/* ensure window is not unmapped */
if (!window->hvwc_map)
goto unlock;
print_reg(s, window, VREG(LPID));
print_reg(s, window, VREG(PID));
print_reg(s, window, VREG(XLATE_MSR));
print_reg(s, window, VREG(XLATE_LPCR));
print_reg(s, window, VREG(XLATE_CTL));
print_reg(s, window, VREG(AMR));
print_reg(s, window, VREG(SEIDR));
print_reg(s, window, VREG(FAULT_TX_WIN));
print_reg(s, window, VREG(OSU_INTR_SRC_RA));
print_reg(s, window, VREG(HV_INTR_SRC_RA));
print_reg(s, window, VREG(PSWID));
print_reg(s, window, VREG(LFIFO_BAR));
print_reg(s, window, VREG(LDATA_STAMP_CTL));
print_reg(s, window, VREG(LDMA_CACHE_CTL));
print_reg(s, window, VREG(LRFIFO_PUSH));
print_reg(s, window, VREG(CURR_MSG_COUNT));
print_reg(s, window, VREG(LNOTIFY_AFTER_COUNT));
print_reg(s, window, VREG(LRX_WCRED));
print_reg(s, window, VREG(LRX_WCRED_ADDER));
print_reg(s, window, VREG(TX_WCRED));
print_reg(s, window, VREG(TX_WCRED_ADDER));
print_reg(s, window, VREG(LFIFO_SIZE));
print_reg(s, window, VREG(WINCTL));
print_reg(s, window, VREG(WIN_STATUS));
print_reg(s, window, VREG(WIN_CTX_CACHING_CTL));
print_reg(s, window, VREG(TX_RSVD_BUF_COUNT));
print_reg(s, window, VREG(LRFIFO_WIN_PTR));
print_reg(s, window, VREG(LNOTIFY_CTL));
print_reg(s, window, VREG(LNOTIFY_PID));
print_reg(s, window, VREG(LNOTIFY_LPID));
print_reg(s, window, VREG(LNOTIFY_TID));
print_reg(s, window, VREG(LNOTIFY_SCOPE));
print_reg(s, window, VREG(NX_UTIL_ADDER));
unlock:
mutex_unlock(&vas_mutex);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(hvwc);
void vas_window_free_dbgdir(struct vas_window *window)
{
if (window->dbgdir) {
debugfs_remove_recursive(window->dbgdir);
kfree(window->dbgname);
window->dbgdir = NULL;
window->dbgname = NULL;
}
}
void vas_window_init_dbgdir(struct vas_window *window)
{
struct dentry *f, *d;
if (!window->vinst->dbgdir)
return;
window->dbgname = kzalloc(16, GFP_KERNEL);
if (!window->dbgname)
return;
snprintf(window->dbgname, 16, "w%d", window->winid);
d = debugfs_create_dir(window->dbgname, window->vinst->dbgdir);
if (IS_ERR(d))
goto free_name;
window->dbgdir = d;
f = debugfs_create_file("info", 0444, d, window, &info_fops);
if (IS_ERR(f))
goto remove_dir;
f = debugfs_create_file("hvwc", 0444, d, window, &hvwc_fops);
if (IS_ERR(f))
goto remove_dir;
return;
remove_dir:
debugfs_remove_recursive(window->dbgdir);
window->dbgdir = NULL;
free_name:
kfree(window->dbgname);
window->dbgname = NULL;
}
void vas_instance_init_dbgdir(struct vas_instance *vinst)
{
struct dentry *d;
vas_init_dbgdir();
if (!vas_debugfs)
return;
vinst->dbgname = kzalloc(16, GFP_KERNEL);
if (!vinst->dbgname)
return;
snprintf(vinst->dbgname, 16, "v%d", vinst->vas_id);
d = debugfs_create_dir(vinst->dbgname, vas_debugfs);
if (IS_ERR(d))
goto free_name;
vinst->dbgdir = d;
return;
free_name:
kfree(vinst->dbgname);
vinst->dbgname = NULL;
vinst->dbgdir = NULL;
}
/*
* Set up the "root" VAS debugfs dir. Return if we already set it up
* (or failed to) in an earlier instance of VAS.
*/
void vas_init_dbgdir(void)
{
static bool first_time = true;
if (!first_time)
return;
first_time = false;
vas_debugfs = debugfs_create_dir("vas", NULL);
if (IS_ERR(vas_debugfs))
vas_debugfs = NULL;
}
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