[deliverable/linux.git] / drivers / net / enic / vnic_intr.h

/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * 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.
 *
 */

#ifndef _VNIC_INTR_H_
#define _VNIC_INTR_H_

#include <linux/pci.h>

#include "vnic_dev.h"

#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);
	(void)ioread32(&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_coalescing_timer_set(struct vnic_intr *intr,
	unsigned int coalescing_timer);
void vnic_intr_clean(struct vnic_intr *intr);

#endif /* _VNIC_INTR_H_ */
Commit	Line	Data
01f2e4ea SF	1	/*
	2	* Copyright 2008 Cisco Systems, Inc. All rights reserved.
	3	* Copyright 2007 Nuova Systems, Inc. All rights reserved.
	4	*
	5	* This program is free software; you may redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; version 2 of the License.
	8	*
	9	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	10	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	11	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	12	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	13	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	14	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	15	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	16	* SOFTWARE.
	17	*
	18	*/
	19
	20	#ifndef _VNIC_INTR_H_
	21	#define _VNIC_INTR_H_
	22
	23	#include <linux/pci.h>
	24
	25	#include "vnic_dev.h"
	26
	27	#define VNIC_INTR_TIMER_MAX 0xffff
	28
	29	#define VNIC_INTR_TIMER_TYPE_ABS 0
	30	#define VNIC_INTR_TIMER_TYPE_QUIET 1
	31
	32	/* Interrupt control */
	33	struct vnic_intr_ctrl {
	34	u32 coalescing_timer; /* 0x00 */
	35	u32 pad0;
	36	u32 coalescing_value; /* 0x08 */
	37	u32 pad1;
	38	u32 coalescing_type; /* 0x10 */
	39	u32 pad2;
	40	u32 mask_on_assertion; /* 0x18 */
	41	u32 pad3;
	42	u32 mask; /* 0x20 */
	43	u32 pad4;
	44	u32 int_credits; /* 0x28 */
	45	u32 pad5;
	46	u32 int_credit_return; /* 0x30 */
	47	u32 pad6;
	48	};
	49
	50	struct vnic_intr {
	51	unsigned int index;
	52	struct vnic_dev *vdev;
	53	struct vnic_intr_ctrl __iomem ctrl; / memory-mapped */
	54	};
	55
	56	static inline void vnic_intr_unmask(struct vnic_intr *intr)
	57	{
	58	iowrite32(0, &intr->ctrl->mask);
	59	}
	60
	61	static inline void vnic_intr_mask(struct vnic_intr *intr)
	62	{
	63	iowrite32(1, &intr->ctrl->mask);
b3d18d19	64	(void)ioread32(&intr->ctrl->mask);
01f2e4ea SF	65	}
	66
	67	static inline void vnic_intr_return_credits(struct vnic_intr *intr,
	68	unsigned int credits, int unmask, int reset_timer)
	69	{
	70	#define VNIC_INTR_UNMASK_SHIFT 16
	71	#define VNIC_INTR_RESET_TIMER_SHIFT 17
	72
	73	u32 int_credit_return = (credits & 0xffff) \|
	74	(unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) \|
	75	(reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
	76
	77	iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
	78	}
	79
ed8af6b2 SF	80	static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
	81	{
	82	return ioread32(&intr->ctrl->int_credits);
	83	}
	84
	85	static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)
	86	{
	87	unsigned int credits = vnic_intr_credits(intr);
	88	int unmask = 1;
	89	int reset_timer = 1;
	90
	91	vnic_intr_return_credits(intr, credits, unmask, reset_timer);
	92	}
	93
01f2e4ea SF	94	static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
01f2e4ea SF	95	{
21fc578d	96	/* read PBA without clearing */
01f2e4ea SF	97	return ioread32(legacy_pba);
	98	}
	99
	100	void vnic_intr_free(struct vnic_intr *intr);
	101	int vnic_intr_alloc(struct vnic_dev vdev, struct vnic_intr intr,
	102	unsigned int index);
	103	void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
	104	unsigned int coalescing_type, unsigned int mask_on_assertion);
7c844599 SF	105	void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
7c844599 SF	106	unsigned int coalescing_timer);
01f2e4ea SF	107	void vnic_intr_clean(struct vnic_intr *intr);
	108
	109	#endif /* _VNIC_INTR_H_ */