/* * 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_psl9(struct cxl *adapter){	/* Stop the trace */	cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x4480000000000000ULL);} void cxl_stop_trace_psl8(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_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("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR2));	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));} 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);}