forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
170 lines
4.7 KiB
170 lines
4.7 KiB
/* |
|
* 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_WQ_H_ |
|
#define _VNIC_WQ_H_ |
|
|
|
#include <linux/pci.h> |
|
#include "vnic_dev.h" |
|
#include "vnic_cq.h" |
|
|
|
/* Work queue control */ |
|
struct vnic_wq_ctrl { |
|
u64 ring_base; /* 0x00 */ |
|
u32 ring_size; /* 0x08 */ |
|
u32 pad0; |
|
u32 posted_index; /* 0x10 */ |
|
u32 pad1; |
|
u32 cq_index; /* 0x18 */ |
|
u32 pad2; |
|
u32 enable; /* 0x20 */ |
|
u32 pad3; |
|
u32 running; /* 0x28 */ |
|
u32 pad4; |
|
u32 fetch_index; /* 0x30 */ |
|
u32 pad5; |
|
u32 dca_value; /* 0x38 */ |
|
u32 pad6; |
|
u32 error_interrupt_enable; /* 0x40 */ |
|
u32 pad7; |
|
u32 error_interrupt_offset; /* 0x48 */ |
|
u32 pad8; |
|
u32 error_status; /* 0x50 */ |
|
u32 pad9; |
|
}; |
|
|
|
struct vnic_wq_buf { |
|
struct vnic_wq_buf *next; |
|
dma_addr_t dma_addr; |
|
void *os_buf; |
|
unsigned int len; |
|
unsigned int index; |
|
int sop; |
|
void *desc; |
|
}; |
|
|
|
/* Break the vnic_wq_buf allocations into blocks of 64 entries */ |
|
#define VNIC_WQ_BUF_MIN_BLK_ENTRIES 32 |
|
#define VNIC_WQ_BUF_DFLT_BLK_ENTRIES 64 |
|
#define VNIC_WQ_BUF_BLK_ENTRIES(entries) \ |
|
((unsigned int)(entries < VNIC_WQ_BUF_DFLT_BLK_ENTRIES) ? \ |
|
VNIC_WQ_BUF_MIN_BLK_ENTRIES : VNIC_WQ_BUF_DFLT_BLK_ENTRIES) |
|
#define VNIC_WQ_BUF_BLK_SZ \ |
|
(VNIC_WQ_BUF_DFLT_BLK_ENTRIES * sizeof(struct vnic_wq_buf)) |
|
#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \ |
|
DIV_ROUND_UP(entries, VNIC_WQ_BUF_DFLT_BLK_ENTRIES) |
|
#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \ |
|
DIV_ROUND_UP(entries, VNIC_WQ_BUF_DFLT_BLK_ENTRIES) |
|
#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096) |
|
|
|
struct vnic_wq { |
|
unsigned int index; |
|
struct vnic_dev *vdev; |
|
struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */ |
|
struct vnic_dev_ring ring; |
|
struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX]; |
|
struct vnic_wq_buf *to_use; |
|
struct vnic_wq_buf *to_clean; |
|
unsigned int pkts_outstanding; |
|
}; |
|
|
|
static inline unsigned int svnic_wq_desc_avail(struct vnic_wq *wq) |
|
{ |
|
/* how many does SW own? */ |
|
return wq->ring.desc_avail; |
|
} |
|
|
|
static inline unsigned int svnic_wq_desc_used(struct vnic_wq *wq) |
|
{ |
|
/* how many does HW own? */ |
|
return wq->ring.desc_count - wq->ring.desc_avail - 1; |
|
} |
|
|
|
static inline void *svnic_wq_next_desc(struct vnic_wq *wq) |
|
{ |
|
return wq->to_use->desc; |
|
} |
|
|
|
static inline void svnic_wq_post(struct vnic_wq *wq, |
|
void *os_buf, dma_addr_t dma_addr, |
|
unsigned int len, int sop, int eop) |
|
{ |
|
struct vnic_wq_buf *buf = wq->to_use; |
|
|
|
buf->sop = sop; |
|
buf->os_buf = eop ? os_buf : NULL; |
|
buf->dma_addr = dma_addr; |
|
buf->len = len; |
|
|
|
buf = buf->next; |
|
if (eop) { |
|
/* Adding write memory barrier prevents compiler and/or CPU |
|
* reordering, thus avoiding descriptor posting before |
|
* descriptor is initialized. Otherwise, hardware can read |
|
* stale descriptor fields. |
|
*/ |
|
wmb(); |
|
iowrite32(buf->index, &wq->ctrl->posted_index); |
|
} |
|
wq->to_use = buf; |
|
|
|
wq->ring.desc_avail--; |
|
} |
|
|
|
static inline void svnic_wq_service(struct vnic_wq *wq, |
|
struct cq_desc *cq_desc, u16 completed_index, |
|
void (*buf_service)(struct vnic_wq *wq, |
|
struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque), |
|
void *opaque) |
|
{ |
|
struct vnic_wq_buf *buf; |
|
|
|
buf = wq->to_clean; |
|
while (1) { |
|
|
|
(*buf_service)(wq, cq_desc, buf, opaque); |
|
|
|
wq->ring.desc_avail++; |
|
|
|
wq->to_clean = buf->next; |
|
|
|
if (buf->index == completed_index) |
|
break; |
|
|
|
buf = wq->to_clean; |
|
} |
|
} |
|
|
|
void svnic_wq_free(struct vnic_wq *wq); |
|
int svnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, |
|
unsigned int index, unsigned int desc_count, unsigned int desc_size); |
|
int vnic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, |
|
unsigned int desc_count, unsigned int desc_size); |
|
void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index, |
|
unsigned int fetch_index, unsigned int post_index, |
|
unsigned int error_interrupt_enable, |
|
unsigned int error_interrupt_offset); |
|
|
|
void svnic_wq_init(struct vnic_wq *wq, unsigned int cq_index, |
|
unsigned int error_interrupt_enable, |
|
unsigned int error_interrupt_offset); |
|
unsigned int svnic_wq_error_status(struct vnic_wq *wq); |
|
void svnic_wq_enable(struct vnic_wq *wq); |
|
int svnic_wq_disable(struct vnic_wq *wq); |
|
void svnic_wq_clean(struct vnic_wq *wq, |
|
void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf)); |
|
#endif /* _VNIC_WQ_H_ */
|
|
|