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 #include <linux/errno.h> 7 #include <linux/types.h> 8 #include <linux/pci.h> 9 #include "vnic_dev.h" 10 #include "vnic_cq.h" 11 12 void vnic_cq_free(struct vnic_cq *cq) 13 { 14 vnic_dev_free_desc_ring(cq->vdev, &cq->ring); 15 16 cq->ctrl = NULL; 17 } 18 19 int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index, 20 unsigned int desc_count, unsigned int desc_size) 21 { 22 int err; 23 24 cq->index = index; 25 cq->vdev = vdev; 26 27 cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index); 28 if (!cq->ctrl) { 29 printk(KERN_ERR "Failed to hook CQ[%d] resource\n", index); 30 return -EINVAL; 31 } 32 33 err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size); 34 if (err) 35 return err; 36 37 return 0; 38 } 39 40 void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable, 41 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail, 42 unsigned int cq_tail_color, unsigned int interrupt_enable, 43 unsigned int cq_entry_enable, unsigned int cq_message_enable, 44 unsigned int interrupt_offset, u64 cq_message_addr) 45 { 46 u64 paddr; 47 48 paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET; 49 writeq(paddr, &cq->ctrl->ring_base); 50 iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size); 51 iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable); 52 iowrite32(color_enable, &cq->ctrl->color_enable); 53 iowrite32(cq_head, &cq->ctrl->cq_head); 54 iowrite32(cq_tail, &cq->ctrl->cq_tail); 55 iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color); 56 iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable); 57 iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable); 58 iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable); 59 iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset); 60 writeq(cq_message_addr, &cq->ctrl->cq_message_addr); 61 } 62 63 void vnic_cq_clean(struct vnic_cq *cq) 64 { 65 cq->to_clean = 0; 66 cq->last_color = 0; 67 68 iowrite32(0, &cq->ctrl->cq_head); 69 iowrite32(0, &cq->ctrl->cq_tail); 70 iowrite32(1, &cq->ctrl->cq_tail_color); 71 72 vnic_dev_clear_desc_ring(&cq->ring); 73 } 74