mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 08:58:07 +00:00
5df6d737dd
fnic is a driver for the Cisco PCI-Express FCoE HBA Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
/*
|
|
* 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"
|
|
|
|
/*
|
|
* 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_ */
|