99 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright 2008 Cisco Systems, Inc. All rights reserved.4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.5 */6 7#include <linux/errno.h>8#include <linux/types.h>9#include <linux/pci.h>10#include <linux/delay.h>11#include "vnic_wq_copy.h"12 13void vnic_wq_copy_enable(struct vnic_wq_copy *wq)14{15 iowrite32(1, &wq->ctrl->enable);16}17 18int vnic_wq_copy_disable(struct vnic_wq_copy *wq)19{20 unsigned int wait;21 22 iowrite32(0, &wq->ctrl->enable);23 24 /* Wait for HW to ACK disable request */25 for (wait = 0; wait < 100; wait++) {26 if (!(ioread32(&wq->ctrl->running)))27 return 0;28 udelay(1);29 }30 31 printk(KERN_ERR "Failed to disable Copy WQ[%d],"32 " fetch index=%d, posted_index=%d\n",33 wq->index, ioread32(&wq->ctrl->fetch_index),34 ioread32(&wq->ctrl->posted_index));35 36 return -ENODEV;37}38 39void vnic_wq_copy_clean(struct vnic_wq_copy *wq,40 void (*q_clean)(struct vnic_wq_copy *wq,41 struct fcpio_host_req *wq_desc))42{43 BUG_ON(ioread32(&wq->ctrl->enable));44 45 if (vnic_wq_copy_desc_in_use(wq))46 vnic_wq_copy_service(wq, -1, q_clean);47 48 wq->to_use_index = wq->to_clean_index = 0;49 50 iowrite32(0, &wq->ctrl->fetch_index);51 iowrite32(0, &wq->ctrl->posted_index);52 iowrite32(0, &wq->ctrl->error_status);53 54 vnic_dev_clear_desc_ring(&wq->ring);55}56 57void vnic_wq_copy_free(struct vnic_wq_copy *wq)58{59 struct vnic_dev *vdev;60 61 vdev = wq->vdev;62 vnic_dev_free_desc_ring(vdev, &wq->ring);63 wq->ctrl = NULL;64}65 66int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,67 unsigned int index, unsigned int desc_count,68 unsigned int desc_size)69{70 wq->index = index;71 wq->vdev = vdev;72 wq->to_use_index = wq->to_clean_index = 0;73 wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);74 if (!wq->ctrl) {75 printk(KERN_ERR "Failed to hook COPY WQ[%d] resource\n", index);76 return -EINVAL;77 }78 79 vnic_wq_copy_disable(wq);80 81 return vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);82}83 84void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,85 unsigned int error_interrupt_enable,86 unsigned int error_interrupt_offset)87{88 u64 paddr;89 90 paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;91 writeq(paddr, &wq->ctrl->ring_base);92 iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);93 iowrite32(0, &wq->ctrl->fetch_index);94 iowrite32(0, &wq->ctrl->posted_index);95 iowrite32(cq_index, &wq->ctrl->cq_index);96 iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);97 iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);98}99