From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/scsi/fnic/vnic_intr.h | 106 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 drivers/scsi/fnic/vnic_intr.h (limited to 'drivers/scsi/fnic/vnic_intr.h') diff --git a/drivers/scsi/fnic/vnic_intr.h b/drivers/scsi/fnic/vnic_intr.h new file mode 100644 index 0000000000..acc194c0f5 --- /dev/null +++ b/drivers/scsi/fnic/vnic_intr.h @@ -0,0 +1,106 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright 2008 Cisco Systems, Inc. All rights reserved. + * Copyright 2007 Nuova Systems, Inc. All rights reserved. + */ +#ifndef _VNIC_INTR_H_ +#define _VNIC_INTR_H_ + +#include +#include "vnic_dev.h" + +/* + * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth + * Driver) when both are built with CONFIG options =y + */ +#define vnic_intr_unmask fnic_intr_unmask +#define vnic_intr_mask fnic_intr_mask +#define vnic_intr_return_credits fnic_intr_return_credits +#define vnic_intr_credits fnic_intr_credits +#define vnic_intr_return_all_credits fnic_intr_return_all_credits +#define vnic_intr_legacy_pba fnic_intr_legacy_pba +#define vnic_intr_free fnic_intr_free +#define vnic_intr_alloc fnic_intr_alloc +#define vnic_intr_init fnic_intr_init +#define vnic_intr_clean fnic_intr_clean + +#define VNIC_INTR_TIMER_MAX 0xffff + +#define VNIC_INTR_TIMER_TYPE_ABS 0 +#define VNIC_INTR_TIMER_TYPE_QUIET 1 + +/* Interrupt control */ +struct vnic_intr_ctrl { + u32 coalescing_timer; /* 0x00 */ + u32 pad0; + u32 coalescing_value; /* 0x08 */ + u32 pad1; + u32 coalescing_type; /* 0x10 */ + u32 pad2; + u32 mask_on_assertion; /* 0x18 */ + u32 pad3; + u32 mask; /* 0x20 */ + u32 pad4; + u32 int_credits; /* 0x28 */ + u32 pad5; + u32 int_credit_return; /* 0x30 */ + u32 pad6; +}; + +struct vnic_intr { + unsigned int index; + struct vnic_dev *vdev; + struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */ +}; + +static inline void vnic_intr_unmask(struct vnic_intr *intr) +{ + iowrite32(0, &intr->ctrl->mask); +} + +static inline void vnic_intr_mask(struct vnic_intr *intr) +{ + iowrite32(1, &intr->ctrl->mask); +} + +static inline void vnic_intr_return_credits(struct vnic_intr *intr, + unsigned int credits, int unmask, int reset_timer) +{ +#define VNIC_INTR_UNMASK_SHIFT 16 +#define VNIC_INTR_RESET_TIMER_SHIFT 17 + + u32 int_credit_return = (credits & 0xffff) | + (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) | + (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0); + + iowrite32(int_credit_return, &intr->ctrl->int_credit_return); +} + +static inline unsigned int vnic_intr_credits(struct vnic_intr *intr) +{ + return ioread32(&intr->ctrl->int_credits); +} + +static inline void vnic_intr_return_all_credits(struct vnic_intr *intr) +{ + unsigned int credits = vnic_intr_credits(intr); + int unmask = 1; + int reset_timer = 1; + + vnic_intr_return_credits(intr, credits, unmask, reset_timer); +} + +static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba) +{ + /* read PBA without clearing */ + return ioread32(legacy_pba); +} + +void vnic_intr_free(struct vnic_intr *intr); +int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, + unsigned int index); +void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer, + unsigned int coalescing_type, unsigned int mask_on_assertion); +void vnic_intr_clean(struct vnic_intr *intr); + +#endif /* _VNIC_INTR_H_ */ -- cgit v1.2.3