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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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}135