1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright 2014 Cisco Systems, Inc. All rights reserved. 3 4 #include <linux/errno.h> 5 #include <linux/types.h> 6 #include <linux/pci.h> 7 #include "vnic_dev.h" 8 #include "vnic_cq.h" 9 10 void svnic_cq_free(struct vnic_cq *cq) 11 { 12 svnic_dev_free_desc_ring(cq->vdev, &cq->ring); 13 14 cq->ctrl = NULL; 15 } 16 17 int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, 18 unsigned int index, unsigned int desc_count, unsigned int desc_size) 19 { 20 cq->index = index; 21 cq->vdev = vdev; 22 23 cq->ctrl = svnic_dev_get_res(vdev, RES_TYPE_CQ, index); 24 if (!cq->ctrl) { 25 pr_err("Failed to hook CQ[%d] resource\n", index); 26 27 return -EINVAL; 28 } 29 30 return svnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size); 31 } 32 33 void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable, 34 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail, 35 unsigned int cq_tail_color, unsigned int interrupt_enable, 36 unsigned int cq_entry_enable, unsigned int cq_message_enable, 37 unsigned int interrupt_offset, u64 cq_message_addr) 38 { 39 u64 paddr; 40 41 paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET; 42 writeq(paddr, &cq->ctrl->ring_base); 43 iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size); 44 iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable); 45 iowrite32(color_enable, &cq->ctrl->color_enable); 46 iowrite32(cq_head, &cq->ctrl->cq_head); 47 iowrite32(cq_tail, &cq->ctrl->cq_tail); 48 iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color); 49 iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable); 50 iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable); 51 iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable); 52 iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset); 53 writeq(cq_message_addr, &cq->ctrl->cq_message_addr); 54 } 55 56 void svnic_cq_clean(struct vnic_cq *cq) 57 { 58 cq->to_clean = 0; 59 cq->last_color = 0; 60 61 iowrite32(0, &cq->ctrl->cq_head); 62 iowrite32(0, &cq->ctrl->cq_tail); 63 iowrite32(1, &cq->ctrl->cq_tail_color); 64 65 svnic_dev_clear_desc_ring(&cq->ring); 66 } 67