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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 */
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