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dfb99b050e
Based on the normalized pattern:
this program is free software you may redistribute it and/or modify it
under the terms of the gnu general public license as published by the
free software foundation version 2 of the license the software is
provided as is without warranty of any kind express or implied
including but not limited to the warranties of merchantability fitness
for a particular purpose and noninfringement in no event shall the
authors or copyright holders be liable for any claim damages or other
liability whether in an action of contract tort or otherwise arising
from out of or in connection with the software or the use or other
dealings in the software
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright 2014 Cisco Systems, Inc. All rights reserved. */
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#ifndef _VNIC_INTR_H_
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#define _VNIC_INTR_H_
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#include <linux/pci.h>
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#include "vnic_dev.h"
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#define VNIC_INTR_TIMER_MAX 0xffff
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#define VNIC_INTR_TIMER_TYPE_ABS 0
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#define VNIC_INTR_TIMER_TYPE_QUIET 1
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/* Interrupt control */
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struct vnic_intr_ctrl {
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u32 coalescing_timer; /* 0x00 */
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u32 pad0;
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u32 coalescing_value; /* 0x08 */
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u32 pad1;
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u32 coalescing_type; /* 0x10 */
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u32 pad2;
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u32 mask_on_assertion; /* 0x18 */
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u32 pad3;
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u32 mask; /* 0x20 */
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u32 pad4;
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u32 int_credits; /* 0x28 */
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u32 pad5;
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u32 int_credit_return; /* 0x30 */
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u32 pad6;
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};
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struct vnic_intr {
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unsigned int index;
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struct vnic_dev *vdev;
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struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */
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};
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static inline void
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svnic_intr_unmask(struct vnic_intr *intr)
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{
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iowrite32(0, &intr->ctrl->mask);
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}
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static inline void
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svnic_intr_mask(struct vnic_intr *intr)
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{
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iowrite32(1, &intr->ctrl->mask);
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}
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static inline void
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svnic_intr_return_credits(struct vnic_intr *intr,
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unsigned int credits,
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int unmask,
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int reset_timer)
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{
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#define VNIC_INTR_UNMASK_SHIFT 16
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#define VNIC_INTR_RESET_TIMER_SHIFT 17
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u32 int_credit_return = (credits & 0xffff) |
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(unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
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(reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
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iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
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}
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static inline unsigned int
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svnic_intr_credits(struct vnic_intr *intr)
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{
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return ioread32(&intr->ctrl->int_credits);
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}
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static inline void
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svnic_intr_return_all_credits(struct vnic_intr *intr)
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{
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unsigned int credits = svnic_intr_credits(intr);
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int unmask = 1;
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int reset_timer = 1;
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svnic_intr_return_credits(intr, credits, unmask, reset_timer);
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}
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void svnic_intr_free(struct vnic_intr *);
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int svnic_intr_alloc(struct vnic_dev *, struct vnic_intr *, unsigned int);
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void svnic_intr_init(struct vnic_intr *intr,
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unsigned int coalescing_timer,
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unsigned int coalescing_type,
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unsigned int mask_on_assertion);
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void svnic_intr_clean(struct vnic_intr *);
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#endif /* _VNIC_INTR_H_ */
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