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-rw-r--r--drivers/infiniband/hw/hfi1/affinity.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/affinity.h b/drivers/infiniband/hw/hfi1/affinity.h
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+/*
+ * Copyright(c) 2015, 2016 Intel Corporation.
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef _HFI1_AFFINITY_H
+#define _HFI1_AFFINITY_H
+
+#include "hfi.h"
+
+enum irq_type {
+ IRQ_SDMA,
+ IRQ_RCVCTXT,
+ IRQ_GENERAL,
+ IRQ_OTHER
+};
+
+/* Can be used for both memory and cpu */
+enum affinity_flags {
+ AFF_AUTO,
+ AFF_NUMA_LOCAL,
+ AFF_DEV_LOCAL,
+ AFF_IRQ_LOCAL
+};
+
+struct cpu_mask_set {
+ struct cpumask mask;
+ struct cpumask used;
+ uint gen;
+};
+
+struct hfi1_affinity {
+ struct cpu_mask_set def_intr;
+ struct cpu_mask_set rcv_intr;
+ struct cpu_mask_set proc;
+ struct cpumask real_cpu_mask;
+ /* spin lock to protect affinity struct */
+ spinlock_t lock;
+};
+
+struct hfi1_msix_entry;
+
+/* Initialize non-HT cpu cores mask */
+int init_real_cpu_mask(struct hfi1_devdata *);
+/* Initialize driver affinity data */
+void hfi1_dev_affinity_init(struct hfi1_devdata *);
+/* Free driver affinity data */
+void hfi1_dev_affinity_free(struct hfi1_devdata *);
+/*
+ * Set IRQ affinity to a CPU. The function will determine the
+ * CPU and set the affinity to it.
+ */
+int hfi1_get_irq_affinity(struct hfi1_devdata *, struct hfi1_msix_entry *);
+/*
+ * Remove the IRQ's CPU affinity. This function also updates
+ * any internal CPU tracking data
+ */
+void hfi1_put_irq_affinity(struct hfi1_devdata *, struct hfi1_msix_entry *);
+/*
+ * Determine a CPU affinity for a user process, if the process does not
+ * have an affinity set yet.
+ */
+int hfi1_get_proc_affinity(struct hfi1_devdata *, int);
+/* Release a CPU used by a user process. */
+void hfi1_put_proc_affinity(struct hfi1_devdata *, int);
+
+#endif /* _HFI1_AFFINITY_H */