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Message-Id: <1473328647-33116-22-git-send-email-fenghua.yu@intel.com>
Date: Thu, 8 Sep 2016 02:57:15 -0700
From: "Fenghua Yu" <fenghua.yu@...el.com>
To: "Thomas Gleixner" <tglx@...utronix.de>,
"H. Peter Anvin" <h.peter.anvin@...el.com>,
"Ingo Molnar" <mingo@...e.hu>, "Tony Luck" <tony.luck@...el.com>,
"Peter Zijlstra" <peterz@...radead.org>,
"Tejun Heo" <tj@...nel.org>, "Borislav Petkov" <bp@...e.de>,
"Stephane Eranian" <eranian@...gle.com>,
"Marcelo Tosatti" <mtosatti@...hat.com>,
"David Carrillo-Cisneros" <davidcc@...gle.com>,
"Shaohua Li" <shli@...com>,
"Ravi V Shankar" <ravi.v.shankar@...el.com>,
"Vikas Shivappa" <vikas.shivappa@...ux.intel.com>,
"Sai Prakhya" <sai.praneeth.prakhya@...el.com>
Cc: "linux-kernel" <linux-kernel@...r.kernel.org>,
"x86" <x86@...nel.org>, Fenghua Yu <fenghua.yu@...el.com>
Subject: [PATCH v2 21/33] x86/intel_rdt_rdtgroup.h: Header for user interface
From: Fenghua Yu <fenghua.yu@...el.com>
This is header file for user interface file intel_rdt_rdtgroup.c.
Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
Reviewed-by: Tony Luck <tony.luck@...el.com>
---
arch/x86/include/asm/intel_rdt_rdtgroup.h | 150 ++++++++++++++++++++++++++++++
1 file changed, 150 insertions(+)
create mode 100644 arch/x86/include/asm/intel_rdt_rdtgroup.h
diff --git a/arch/x86/include/asm/intel_rdt_rdtgroup.h b/arch/x86/include/asm/intel_rdt_rdtgroup.h
new file mode 100644
index 0000000..3703964
--- /dev/null
+++ b/arch/x86/include/asm/intel_rdt_rdtgroup.h
@@ -0,0 +1,150 @@
+#ifndef _RDT_PGROUP_H
+#define _RDT_PGROUP_H
+#define MAX_RDTGROUP_TYPE_NAMELEN 32
+#define MAX_RDTGROUP_ROOT_NAMELEN 64
+#define MAX_RFTYPE_NAME 64
+
+#include <linux/kernfs.h>
+#include <asm/intel_rdt.h>
+
+extern void rdtgroup_exit(struct task_struct *tsk);
+
+/* cftype->flags */
+enum {
+ RFTYPE_WORLD_WRITABLE = (1 << 4),/* (DON'T USE FOR NEW FILES) S_IWUGO */
+
+ /* internal flags, do not use outside rdtgroup core proper */
+ __RFTYPE_ONLY_ON_DFL = (1 << 16),/* only on default hierarchy */
+ __RFTYPE_NOT_ON_DFL = (1 << 17),/* not on default hierarchy */
+};
+
+#define CACHE_LEVEL3 3
+
+struct cache_resource {
+ u64 *cbm;
+ u64 *cbm2;
+ int *closid;
+ int *refcnt;
+};
+
+struct rdt_resource {
+ bool valid;
+ int closid[MAX_CACHE_DOMAINS];
+ /* Add more resources here. */
+};
+
+struct rdtgroup {
+ struct kernfs_node *kn; /* rdtgroup kernfs entry */
+
+ struct rdtgroup_root *root;
+
+ struct list_head rdtgroup_list;
+
+ atomic_t refcount;
+ struct cpumask cpu_mask;
+ char schema[1024];
+
+ struct rdt_resource resource;
+
+ /* ids of the ancestors at each level including self */
+ int ancestor_ids[];
+};
+
+struct rftype {
+ /*
+ * By convention, the name should begin with the name of the
+ * subsystem, followed by a period. Zero length string indicates
+ * end of cftype array.
+ */
+ char name[MAX_CFTYPE_NAME];
+ unsigned long private;
+
+ /*
+ * The maximum length of string, excluding trailing nul, that can
+ * be passed to write. If < PAGE_SIZE-1, PAGE_SIZE-1 is assumed.
+ */
+ size_t max_write_len;
+
+ /* CFTYPE_* flags */
+ unsigned int flags;
+
+ /*
+ * Fields used for internal bookkeeping. Initialized automatically
+ * during registration.
+ */
+ struct kernfs_ops *kf_ops;
+
+ /*
+ * read_u64() is a shortcut for the common case of returning a
+ * single integer. Use it in place of read()
+ */
+ u64 (*read_u64)(struct rftype *rft);
+ /*
+ * read_s64() is a signed version of read_u64()
+ */
+ s64 (*read_s64)(struct rftype *rft);
+
+ /* generic seq_file read interface */
+ int (*seq_show)(struct seq_file *sf, void *v);
+
+ /* optional ops, implement all or none */
+ void *(*seq_start)(struct seq_file *sf, loff_t *ppos);
+ void *(*seq_next)(struct seq_file *sf, void *v, loff_t *ppos);
+ void (*seq_stop)(struct seq_file *sf, void *v);
+
+ /*
+ * write_u64() is a shortcut for the common case of accepting
+ * a single integer (as parsed by simple_strtoull) from
+ * userspace. Use in place of write(); return 0 or error.
+ */
+ int (*write_u64)(struct rftype *rft, u64 val);
+ /*
+ * write_s64() is a signed version of write_u64()
+ */
+ int (*write_s64)(struct rftype *rft, s64 val);
+
+ /*
+ * write() is the generic write callback which maps directly to
+ * kernfs write operation and overrides all other operations.
+ * Maximum write size is determined by ->max_write_len. Use
+ * of_css/cft() to access the associated css and cft.
+ */
+ ssize_t (*write)(struct kernfs_open_file *of,
+ char *buf, size_t nbytes, loff_t off);
+};
+
+struct rdtgroup_root {
+ struct kernfs_root *kf_root;
+
+ /* Unique id for this hierarchy. */
+ int hierarchy_id;
+
+ /* The root rdtgroup. Root is destroyed on its release. */
+ struct rdtgroup rdtgrp;
+
+ /* Number of rdtgroups in the hierarchy */
+ atomic_t nr_rdtgrps;
+
+ /* Hierarchy-specific flags */
+ unsigned int flags;
+
+ /* IDs for rdtgroups in this hierarchy */
+ struct idr rdtgroup_idr;
+
+ /* The name for this hierarchy - may be empty */
+ char name[MAX_RDTGROUP_ROOT_NAMELEN];
+};
+
+/* get rftype from of */
+static inline struct rftype *of_rft(struct kernfs_open_file *of)
+{
+ return of->kn->priv;
+}
+
+/* get rftype from seq_file */
+static inline struct rftype *seq_rft(struct seq_file *seq)
+{
+ return of_rft(seq->private);
+}
+
+#endif
--
2.5.0
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