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171 lines
4.5 KiB
171 lines
4.5 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright 2008 Cisco Systems, Inc. All rights reserved. |
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* Copyright 2007 Nuova Systems, Inc. All rights reserved. |
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*/ |
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#ifndef _VNIC_WQ_H_ |
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#define _VNIC_WQ_H_ |
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#include <linux/pci.h> |
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#include "vnic_dev.h" |
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#include "vnic_cq.h" |
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/* |
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* These defines avoid symbol clash between fnic and enic (Cisco 10G Eth |
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* Driver) when both are built with CONFIG options =y |
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*/ |
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#define vnic_wq_desc_avail fnic_wq_desc_avail |
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#define vnic_wq_desc_used fnic_wq_desc_used |
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#define vnic_wq_next_desc fni_cwq_next_desc |
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#define vnic_wq_post fnic_wq_post |
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#define vnic_wq_service fnic_wq_service |
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#define vnic_wq_free fnic_wq_free |
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#define vnic_wq_alloc fnic_wq_alloc |
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#define vnic_wq_devcmd2_alloc fnic_wq_devcmd2_alloc |
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#define vnic_wq_init_start fnic_wq_init_start |
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#define vnic_wq_init fnic_wq_init |
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#define vnic_wq_error_status fnic_wq_error_status |
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#define vnic_wq_enable fnic_wq_enable |
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#define vnic_wq_disable fnic_wq_disable |
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#define vnic_wq_clean fnic_wq_clean |
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/* Work queue control */ |
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struct vnic_wq_ctrl { |
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u64 ring_base; /* 0x00 */ |
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u32 ring_size; /* 0x08 */ |
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u32 pad0; |
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u32 posted_index; /* 0x10 */ |
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u32 pad1; |
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u32 cq_index; /* 0x18 */ |
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u32 pad2; |
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u32 enable; /* 0x20 */ |
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u32 pad3; |
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u32 running; /* 0x28 */ |
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u32 pad4; |
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u32 fetch_index; /* 0x30 */ |
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u32 pad5; |
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u32 dca_value; /* 0x38 */ |
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u32 pad6; |
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u32 error_interrupt_enable; /* 0x40 */ |
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u32 pad7; |
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u32 error_interrupt_offset; /* 0x48 */ |
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u32 pad8; |
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u32 error_status; /* 0x50 */ |
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u32 pad9; |
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}; |
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struct vnic_wq_buf { |
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struct vnic_wq_buf *next; |
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dma_addr_t dma_addr; |
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void *os_buf; |
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unsigned int len; |
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unsigned int index; |
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int sop; |
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void *desc; |
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}; |
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/* Break the vnic_wq_buf allocations into blocks of 64 entries */ |
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#define VNIC_WQ_BUF_BLK_ENTRIES 64 |
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#define VNIC_WQ_BUF_BLK_SZ \ |
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(VNIC_WQ_BUF_BLK_ENTRIES * sizeof(struct vnic_wq_buf)) |
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#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \ |
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DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES) |
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#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096) |
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struct vnic_wq { |
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unsigned int index; |
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struct vnic_dev *vdev; |
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struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */ |
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struct vnic_dev_ring ring; |
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struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX]; |
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struct vnic_wq_buf *to_use; |
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struct vnic_wq_buf *to_clean; |
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unsigned int pkts_outstanding; |
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}; |
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static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq) |
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{ |
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/* how many does SW own? */ |
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return wq->ring.desc_avail; |
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} |
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static inline unsigned int vnic_wq_desc_used(struct vnic_wq *wq) |
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{ |
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/* how many does HW own? */ |
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return wq->ring.desc_count - wq->ring.desc_avail - 1; |
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} |
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static inline void *vnic_wq_next_desc(struct vnic_wq *wq) |
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{ |
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return wq->to_use->desc; |
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} |
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static inline void vnic_wq_post(struct vnic_wq *wq, |
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void *os_buf, dma_addr_t dma_addr, |
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unsigned int len, int sop, int eop) |
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{ |
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struct vnic_wq_buf *buf = wq->to_use; |
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buf->sop = sop; |
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buf->os_buf = eop ? os_buf : NULL; |
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buf->dma_addr = dma_addr; |
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buf->len = len; |
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buf = buf->next; |
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if (eop) { |
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/* Adding write memory barrier prevents compiler and/or CPU |
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* reordering, thus avoiding descriptor posting before |
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* descriptor is initialized. Otherwise, hardware can read |
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* stale descriptor fields. |
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*/ |
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wmb(); |
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iowrite32(buf->index, &wq->ctrl->posted_index); |
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} |
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wq->to_use = buf; |
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wq->ring.desc_avail--; |
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} |
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static inline void vnic_wq_service(struct vnic_wq *wq, |
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struct cq_desc *cq_desc, u16 completed_index, |
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void (*buf_service)(struct vnic_wq *wq, |
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struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque), |
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void *opaque) |
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{ |
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struct vnic_wq_buf *buf; |
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buf = wq->to_clean; |
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while (1) { |
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(*buf_service)(wq, cq_desc, buf, opaque); |
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wq->ring.desc_avail++; |
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wq->to_clean = buf->next; |
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if (buf->index == completed_index) |
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break; |
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buf = wq->to_clean; |
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} |
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} |
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void vnic_wq_free(struct vnic_wq *wq); |
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int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index, |
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unsigned int desc_count, unsigned int desc_size); |
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int vnic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, |
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unsigned int desc_count, unsigned int desc_size); |
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void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index, |
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unsigned int fetch_index, unsigned int posted_index, |
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unsigned int error_interrupt_enable, |
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unsigned int error_interrupt_offset); |
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void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index, |
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unsigned int error_interrupt_enable, |
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unsigned int error_interrupt_offset); |
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unsigned int vnic_wq_error_status(struct vnic_wq *wq); |
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void vnic_wq_enable(struct vnic_wq *wq); |
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int vnic_wq_disable(struct vnic_wq *wq); |
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void vnic_wq_clean(struct vnic_wq *wq, |
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void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf)); |
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#endif /* _VNIC_WQ_H_ */
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