diff options
Diffstat (limited to 'drivers/misc/cxl/debugfs.c')
| -rw-r--r-- | drivers/misc/cxl/debugfs.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/drivers/misc/cxl/debugfs.c b/drivers/misc/cxl/debugfs.c new file mode 100644 index 000000000..a1921d815 --- /dev/null +++ b/drivers/misc/cxl/debugfs.c @@ -0,0 +1,152 @@ +/* + * 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)); +} + +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); +} |