mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 18:10:52 +07:00
c8806b6c9e
Cisco has developed a new PCI HBA interface called sNIC, which stands for SCSI NIC. This is a new storage feature supported on specialized network adapter. The new PCI function provides a uniform host interface and abstracts backend storage. [jejb: fix up checkpatch errors] Signed-off-by: Narsimhulu Musini <nmusini@cisco.com> Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: James Bottomley <JBottomley@Odin.com>
106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/*
|
|
* Copyright 2014 Cisco 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
|
|
svnic_intr_unmask(struct vnic_intr *intr)
|
|
{
|
|
iowrite32(0, &intr->ctrl->mask);
|
|
}
|
|
|
|
static inline void
|
|
svnic_intr_mask(struct vnic_intr *intr)
|
|
{
|
|
iowrite32(1, &intr->ctrl->mask);
|
|
}
|
|
|
|
static inline void
|
|
svnic_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
|
|
svnic_intr_credits(struct vnic_intr *intr)
|
|
{
|
|
return ioread32(&intr->ctrl->int_credits);
|
|
}
|
|
|
|
static inline void
|
|
svnic_intr_return_all_credits(struct vnic_intr *intr)
|
|
{
|
|
unsigned int credits = svnic_intr_credits(intr);
|
|
int unmask = 1;
|
|
int reset_timer = 1;
|
|
|
|
svnic_intr_return_credits(intr, credits, unmask, reset_timer);
|
|
}
|
|
|
|
void svnic_intr_free(struct vnic_intr *);
|
|
int svnic_intr_alloc(struct vnic_dev *, struct vnic_intr *, unsigned int);
|
|
void svnic_intr_init(struct vnic_intr *intr,
|
|
unsigned int coalescing_timer,
|
|
unsigned int coalescing_type,
|
|
unsigned int mask_on_assertion);
|
|
void svnic_intr_clean(struct vnic_intr *);
|
|
|
|
#endif /* _VNIC_INTR_H_ */
|