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9c067b844f
This driver is based of the enic (Cisco VIC) DPDK driver. It provides basic ethernet functionality. Has been run with various VIC cards to do UEFI PXE boot with NFS root.
101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright 2008-2017 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 "vnic_dev.h"
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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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#define INTR_COALESCING_TIMER 0x00
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u32 pad0;
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u32 coalescing_value; /* 0x08 */
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#define INTR_COALESCING_VALUE 0x08
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u32 pad1;
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u32 coalescing_type; /* 0x10 */
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#define INTR_COALESCING_TYPE 0x10
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u32 pad2;
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u32 mask_on_assertion; /* 0x18 */
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#define INTR_MASK_ON_ASSERTION 0x18
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u32 pad3;
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u32 mask; /* 0x20 */
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#define INTR_MASK 0x20
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u32 pad4;
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u32 int_credits; /* 0x28 */
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#define INTR_CREDITS 0x28
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u32 pad5;
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u32 int_credit_return; /* 0x30 */
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#define INTR_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_res *ctrl;
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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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ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 1);
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}
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static inline int vnic_intr_masked(struct vnic_intr *intr)
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{
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int ret;
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ret = ENIC_BUS_READ_4(intr->ctrl, INTR_MASK);
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return ret;
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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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ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 0);
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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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ENIC_BUS_WRITE_4(intr->ctrl, INTR_CREDIT_RETURN, 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 ENIC_BUS_READ_4(intr->ctrl, INTR_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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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, u32 coalescing_timer,
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unsigned int coalescing_type, unsigned int mask_on_assertion);
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void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
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u32 coalescing_timer);
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void vnic_intr_clean(struct vnic_intr *intr);
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#endif /* _VNIC_INTR_H_ */
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