diff options
Diffstat (limited to 'drivers/net/enic/vnic_wq.h')
| -rw-r--r-- | drivers/net/enic/vnic_wq.h | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/drivers/net/enic/vnic_wq.h b/drivers/net/enic/vnic_wq.h deleted file mode 100644 index 7dd937ac11c2..000000000000 --- a/drivers/net/enic/vnic_wq.h +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Copyright 2008-2010 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_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 32/64 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(entries) \ - (VNIC_WQ_BUF_BLK_ENTRIES(entries) * sizeof(struct vnic_wq_buf)) -#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \ - DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES(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 vnic_wq_desc_avail(struct vnic_wq *wq) -{ - /* how many does SW own? */ - return wq->ring.desc_avail; -} - -static inline unsigned int vnic_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 *vnic_wq_next_desc(struct vnic_wq *wq) -{ - return wq->to_use->desc; -} - -static inline void vnic_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 vnic_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 vnic_wq_free(struct vnic_wq *wq); -int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index, - unsigned int desc_count, unsigned int desc_size); -void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index, - unsigned int error_interrupt_enable, - unsigned int error_interrupt_offset); -unsigned int vnic_wq_error_status(struct vnic_wq *wq); -void vnic_wq_enable(struct vnic_wq *wq); -int vnic_wq_disable(struct vnic_wq *wq); -void vnic_wq_clean(struct vnic_wq *wq, - void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf)); - -#endif /* _VNIC_WQ_H_ */ |