mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-19 02:34:01 +08:00
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>
111 lines
3.1 KiB
C
111 lines
3.1 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_CQ_H_
|
|
#define _VNIC_CQ_H_
|
|
|
|
#include "cq_desc.h"
|
|
#include "vnic_dev.h"
|
|
|
|
/* Completion queue control */
|
|
struct vnic_cq_ctrl {
|
|
u64 ring_base; /* 0x00 */
|
|
u32 ring_size; /* 0x08 */
|
|
u32 pad0;
|
|
u32 flow_control_enable; /* 0x10 */
|
|
u32 pad1;
|
|
u32 color_enable; /* 0x18 */
|
|
u32 pad2;
|
|
u32 cq_head; /* 0x20 */
|
|
u32 pad3;
|
|
u32 cq_tail; /* 0x28 */
|
|
u32 pad4;
|
|
u32 cq_tail_color; /* 0x30 */
|
|
u32 pad5;
|
|
u32 interrupt_enable; /* 0x38 */
|
|
u32 pad6;
|
|
u32 cq_entry_enable; /* 0x40 */
|
|
u32 pad7;
|
|
u32 cq_message_enable; /* 0x48 */
|
|
u32 pad8;
|
|
u32 interrupt_offset; /* 0x50 */
|
|
u32 pad9;
|
|
u64 cq_message_addr; /* 0x58 */
|
|
u32 pad10;
|
|
};
|
|
|
|
struct vnic_cq {
|
|
unsigned int index;
|
|
struct vnic_dev *vdev;
|
|
struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */
|
|
struct vnic_dev_ring ring;
|
|
unsigned int to_clean;
|
|
unsigned int last_color;
|
|
};
|
|
|
|
static inline unsigned int svnic_cq_service(struct vnic_cq *cq,
|
|
unsigned int work_to_do,
|
|
int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
|
|
u8 type, u16 q_number, u16 completed_index, void *opaque),
|
|
void *opaque)
|
|
{
|
|
struct cq_desc *cq_desc;
|
|
unsigned int work_done = 0;
|
|
u16 q_number, completed_index;
|
|
u8 type, color;
|
|
|
|
cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
|
|
cq->ring.desc_size * cq->to_clean);
|
|
cq_desc_dec(cq_desc, &type, &color,
|
|
&q_number, &completed_index);
|
|
|
|
while (color != cq->last_color) {
|
|
|
|
if ((*q_service)(cq->vdev, cq_desc, type,
|
|
q_number, completed_index, opaque))
|
|
break;
|
|
|
|
cq->to_clean++;
|
|
if (cq->to_clean == cq->ring.desc_count) {
|
|
cq->to_clean = 0;
|
|
cq->last_color = cq->last_color ? 0 : 1;
|
|
}
|
|
|
|
cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
|
|
cq->ring.desc_size * cq->to_clean);
|
|
cq_desc_dec(cq_desc, &type, &color,
|
|
&q_number, &completed_index);
|
|
|
|
work_done++;
|
|
if (work_done >= work_to_do)
|
|
break;
|
|
}
|
|
|
|
return work_done;
|
|
}
|
|
|
|
void svnic_cq_free(struct vnic_cq *cq);
|
|
int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq,
|
|
unsigned int index, unsigned int desc_count, unsigned int desc_size);
|
|
void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
|
|
unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
|
|
unsigned int cq_tail_color, unsigned int interrupt_enable,
|
|
unsigned int cq_entry_enable, unsigned int message_enable,
|
|
unsigned int interrupt_offset, u64 message_addr);
|
|
void svnic_cq_clean(struct vnic_cq *cq);
|
|
#endif /* _VNIC_CQ_H_ */
|