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4a14abc4bb
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Because there's no need to check, also make the return value of the local debugfs_create_io_x64() call void, as no one ever did anything with the return value (as they did not need to.) And make the cxl_debugfs_* calls return void as no one was even checking their return value at all. Cc: linuxppc-dev@lists.ozlabs.org Acked-by: Andrew Donnellan <ajd@linux.ibm.com> Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
135 lines
4.2 KiB
C
135 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2014 IBM Corp.
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*/
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#include <linux/debugfs.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include "cxl.h"
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static struct dentry *cxl_debugfs;
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/* Helpers to export CXL mmaped IO registers via debugfs */
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static int debugfs_io_u64_get(void *data, u64 *val)
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{
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*val = in_be64((u64 __iomem *)data);
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return 0;
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}
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static int debugfs_io_u64_set(void *data, u64 val)
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{
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out_be64((u64 __iomem *)data, val);
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return 0;
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}
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DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set,
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"0x%016llx\n");
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static void debugfs_create_io_x64(const char *name, umode_t mode,
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struct dentry *parent, u64 __iomem *value)
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{
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debugfs_create_file_unsafe(name, mode, parent, (void __force *)value,
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&fops_io_x64);
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}
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void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir)
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{
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debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1));
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debugfs_create_io_x64("fir_mask", 0400, dir,
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_cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK));
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debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL));
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debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG));
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debugfs_create_io_x64("debug", 0600, dir,
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_cxl_p1_addr(adapter, CXL_PSL9_DEBUG));
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debugfs_create_io_x64("xsl-debug", 0600, dir,
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_cxl_p1_addr(adapter, CXL_XSL9_DBG));
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}
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void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir)
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{
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debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1));
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debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2));
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debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL));
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debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE));
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}
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void cxl_debugfs_adapter_add(struct cxl *adapter)
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{
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struct dentry *dir;
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char buf[32];
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if (!cxl_debugfs)
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return;
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snprintf(buf, 32, "card%i", adapter->adapter_num);
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dir = debugfs_create_dir(buf, cxl_debugfs);
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adapter->debugfs = dir;
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debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
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if (adapter->native->sl_ops->debugfs_add_adapter_regs)
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adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir);
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}
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void cxl_debugfs_adapter_remove(struct cxl *adapter)
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{
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debugfs_remove_recursive(adapter->debugfs);
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}
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void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir)
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{
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debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
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}
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void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir)
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{
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debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
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debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
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debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
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debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
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debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
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debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
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}
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void cxl_debugfs_afu_add(struct cxl_afu *afu)
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{
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struct dentry *dir;
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char buf[32];
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if (!afu->adapter->debugfs)
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return;
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snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice);
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dir = debugfs_create_dir(buf, afu->adapter->debugfs);
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afu->debugfs = dir;
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debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
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debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
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debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
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debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
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if (afu->adapter->native->sl_ops->debugfs_add_afu_regs)
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afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir);
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}
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void cxl_debugfs_afu_remove(struct cxl_afu *afu)
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{
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debugfs_remove_recursive(afu->debugfs);
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}
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void __init cxl_debugfs_init(void)
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{
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if (!cpu_has_feature(CPU_FTR_HVMODE))
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return;
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cxl_debugfs = debugfs_create_dir("cxl", NULL);
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}
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void cxl_debugfs_exit(void)
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{
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debugfs_remove_recursive(cxl_debugfs);
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}
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