linux/drivers/misc/cxl/debugfs.c
Vaibhav Jain cbb55eeb49 cxl: Rework the implementation of cxl_stop_trace_psl9()
Presently the PSL9 specific cxl_stop_trace_psl9() only stops the RX0
traces on the CXL adapter when a PSL error irq is triggered. The patch
updates the function to stop all the traces arrays and move them to
the FIN state. The implementation issues the mmio to TRACECFG register
to stop the trace array iff it already not in FIN state. This prevents
the issue of trace data being reset in case of multiple stop mmio
issued for a single trace array.

Also the patch does some refactoring of existing cxl_stop_trace_psl9()
and cxl_stop_trace_psl8() functions by moving them to 'pci.c' from
'debugfs.c' file and marking them as static.

Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-11-06 16:48:17 +11:00

158 lines
4.8 KiB
C

/*
* 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;
/* 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_DEBUGFS_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_unsafe(name, mode, parent,
(void __force *)value, &fops_io_x64);
}
void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir)
{
debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1));
debugfs_create_io_x64("fir_mask", 0400, dir,
_cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK));
debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL));
debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG));
debugfs_create_io_x64("debug", 0600, dir,
_cxl_p1_addr(adapter, CXL_PSL9_DEBUG));
debugfs_create_io_x64("xsl-debug", 0600, dir,
_cxl_p1_addr(adapter, CXL_XSL9_DBG));
}
void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *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("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE));
}
void cxl_debugfs_add_adapter_regs_xsl(struct cxl *adapter, struct dentry *dir)
{
debugfs_create_io_x64("fec", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_XSL_FEC));
}
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("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
if (adapter->native->sl_ops->debugfs_add_adapter_regs)
adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir);
return 0;
}
void cxl_debugfs_adapter_remove(struct cxl *adapter)
{
debugfs_remove_recursive(adapter->debugfs);
}
void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir)
{
debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
}
void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir)
{
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("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("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
}
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("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("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
if (afu->adapter->native->sl_ops->debugfs_add_afu_regs)
afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir);
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);
}