1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 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 13 void vnic_wq_copy_enable(struct vnic_wq_copy *wq) 14 { 15 iowrite32(1, &wq->ctrl->enable); 16 } 17 18 int 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 39 void 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 57 void 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 66 int 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 84 void 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