Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / misc / cxl / debugfs.c

diff --git a/kernel/drivers/misc/cxl/debugfs.c b/kernel/drivers/misc/cxl/debugfs.c
new file mode 100644 (file)
index 0000000..825c412
--- /dev/null
+++ b/kernel/drivers/misc/cxl/debugfs.c
@@ -0,0 +1,132 @@
+/*
+ * 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(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_SIMPLE_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(name, mode, parent, (void *)value, &fops_io_x64);
+}
+
+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("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("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
+
+       debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE));
+
+       return 0;
+}
+
+void cxl_debugfs_adapter_remove(struct cxl *adapter)
+{
+       debugfs_remove_recursive(adapter->debugfs);
+}
+
+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("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("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("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("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
+
+       debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
+
+       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;
+       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);
+}