diff options
Diffstat (limited to 'drivers/net/enic/vnic_rq.h')
| -rw-r--r-- | drivers/net/enic/vnic_rq.h | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/drivers/net/enic/vnic_rq.h b/drivers/net/enic/vnic_rq.h deleted file mode 100644 index 2056586f4d4b..000000000000 --- a/drivers/net/enic/vnic_rq.h +++ /dev/null @@ -1,209 +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_RQ_H_ -#define _VNIC_RQ_H_ - -#include <linux/pci.h> - -#include "vnic_dev.h" -#include "vnic_cq.h" - -/* Receive queue control */ -struct vnic_rq_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 error_interrupt_enable; /* 0x38 */ - u32 pad6; - u32 error_interrupt_offset; /* 0x40 */ - u32 pad7; - u32 error_status; /* 0x48 */ - u32 pad8; - u32 dropped_packet_count; /* 0x50 */ - u32 pad9; - u32 dropped_packet_count_rc; /* 0x58 */ - u32 pad10; -}; - -/* Break the vnic_rq_buf allocations into blocks of 32/64 entries */ -#define VNIC_RQ_BUF_MIN_BLK_ENTRIES 32 -#define VNIC_RQ_BUF_DFLT_BLK_ENTRIES 64 -#define VNIC_RQ_BUF_BLK_ENTRIES(entries) \ - ((unsigned int)((entries < VNIC_RQ_BUF_DFLT_BLK_ENTRIES) ? \ - VNIC_RQ_BUF_MIN_BLK_ENTRIES : VNIC_RQ_BUF_DFLT_BLK_ENTRIES)) -#define VNIC_RQ_BUF_BLK_SZ(entries) \ - (VNIC_RQ_BUF_BLK_ENTRIES(entries) * sizeof(struct vnic_rq_buf)) -#define VNIC_RQ_BUF_BLKS_NEEDED(entries) \ - DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES(entries)) -#define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096) - -struct vnic_rq_buf { - struct vnic_rq_buf *next; - dma_addr_t dma_addr; - void *os_buf; - unsigned int os_buf_index; - unsigned int len; - unsigned int index; - void *desc; -}; - -struct vnic_rq { - unsigned int index; - struct vnic_dev *vdev; - struct vnic_rq_ctrl __iomem *ctrl; /* memory-mapped */ - struct vnic_dev_ring ring; - struct vnic_rq_buf *bufs[VNIC_RQ_BUF_BLKS_MAX]; - struct vnic_rq_buf *to_use; - struct vnic_rq_buf *to_clean; - void *os_buf_head; - unsigned int pkts_outstanding; -}; - -static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq) -{ - /* how many does SW own? */ - return rq->ring.desc_avail; -} - -static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq) -{ - /* how many does HW own? */ - return rq->ring.desc_count - rq->ring.desc_avail - 1; -} - -static inline void *vnic_rq_next_desc(struct vnic_rq *rq) -{ - return rq->to_use->desc; -} - -static inline unsigned int vnic_rq_next_index(struct vnic_rq *rq) -{ - return rq->to_use->index; -} - -static inline void vnic_rq_post(struct vnic_rq *rq, - void *os_buf, unsigned int os_buf_index, - dma_addr_t dma_addr, unsigned int len) -{ - struct vnic_rq_buf *buf = rq->to_use; - - buf->os_buf = os_buf; - buf->os_buf_index = os_buf_index; - buf->dma_addr = dma_addr; - buf->len = len; - - buf = buf->next; - rq->to_use = buf; - rq->ring.desc_avail--; - - /* Move the posted_index every nth descriptor - */ - -#ifndef VNIC_RQ_RETURN_RATE -#define VNIC_RQ_RETURN_RATE 0xf /* keep 2^n - 1 */ -#endif - - if ((buf->index & VNIC_RQ_RETURN_RATE) == 0) { - /* 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, &rq->ctrl->posted_index); - } -} - -static inline void vnic_rq_return_descs(struct vnic_rq *rq, unsigned int count) -{ - rq->ring.desc_avail += count; -} - -enum desc_return_options { - VNIC_RQ_RETURN_DESC, - VNIC_RQ_DEFER_RETURN_DESC, -}; - -static inline void vnic_rq_service(struct vnic_rq *rq, - struct cq_desc *cq_desc, u16 completed_index, - int desc_return, void (*buf_service)(struct vnic_rq *rq, - struct cq_desc *cq_desc, struct vnic_rq_buf *buf, - int skipped, void *opaque), void *opaque) -{ - struct vnic_rq_buf *buf; - int skipped; - - buf = rq->to_clean; - while (1) { - - skipped = (buf->index != completed_index); - - (*buf_service)(rq, cq_desc, buf, skipped, opaque); - - if (desc_return == VNIC_RQ_RETURN_DESC) - rq->ring.desc_avail++; - - rq->to_clean = buf->next; - - if (!skipped) - break; - - buf = rq->to_clean; - } -} - -static inline int vnic_rq_fill(struct vnic_rq *rq, - int (*buf_fill)(struct vnic_rq *rq)) -{ - int err; - - while (vnic_rq_desc_avail(rq) > 0) { - - err = (*buf_fill)(rq); - if (err) - return err; - } - - return 0; -} - -void vnic_rq_free(struct vnic_rq *rq); -int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index, - unsigned int desc_count, unsigned int desc_size); -void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index, - unsigned int error_interrupt_enable, - unsigned int error_interrupt_offset); -unsigned int vnic_rq_error_status(struct vnic_rq *rq); -void vnic_rq_enable(struct vnic_rq *rq); -int vnic_rq_disable(struct vnic_rq *rq); -void vnic_rq_clean(struct vnic_rq *rq, - void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf)); - -#endif /* _VNIC_RQ_H_ */ |