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106 lines
2.8 KiB
106 lines
2.8 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright 2008 Cisco Systems, Inc. All rights reserved. |
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* Copyright 2007 Nuova Systems, Inc. All rights reserved. |
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*/ |
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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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/* |
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* These defines avoid symbol clash between fnic and enic (Cisco 10G Eth |
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* Driver) when both are built with CONFIG options =y |
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*/ |
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#define vnic_intr_unmask fnic_intr_unmask |
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#define vnic_intr_mask fnic_intr_mask |
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#define vnic_intr_return_credits fnic_intr_return_credits |
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#define vnic_intr_credits fnic_intr_credits |
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#define vnic_intr_return_all_credits fnic_intr_return_all_credits |
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#define vnic_intr_legacy_pba fnic_intr_legacy_pba |
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#define vnic_intr_free fnic_intr_free |
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#define vnic_intr_alloc fnic_intr_alloc |
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#define vnic_intr_init fnic_intr_init |
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#define vnic_intr_clean fnic_intr_clean |
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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 vnic_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 vnic_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 vnic_intr_return_credits(struct vnic_intr *intr, |
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unsigned int credits, int unmask, 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 vnic_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 vnic_intr_return_all_credits(struct vnic_intr *intr) |
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{ |
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unsigned int credits = vnic_intr_credits(intr); |
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int unmask = 1; |
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int reset_timer = 1; |
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vnic_intr_return_credits(intr, credits, unmask, reset_timer); |
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} |
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static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba) |
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{ |
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/* read PBA without clearing */ |
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return ioread32(legacy_pba); |
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} |
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void vnic_intr_free(struct vnic_intr *intr); |
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int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, |
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unsigned int index); |
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void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer, |
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unsigned int coalescing_type, unsigned int mask_on_assertion); |
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void vnic_intr_clean(struct vnic_intr *intr); |
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#endif /* _VNIC_INTR_H_ */
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