1 /* 2 * Copyright 2014 Cisco Systems, Inc. All rights reserved. 3 * 4 * This program is free software; you may redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; version 2 of the License. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 15 * SOFTWARE. 16 */ 17 18 #include <linux/errno.h> 19 #include <linux/types.h> 20 #include <linux/pci.h> 21 #include "vnic_dev.h" 22 #include "vnic_cq.h" 23 24 void svnic_cq_free(struct vnic_cq *cq) 25 { 26 svnic_dev_free_desc_ring(cq->vdev, &cq->ring); 27 28 cq->ctrl = NULL; 29 } 30 31 int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, 32 unsigned int index, unsigned int desc_count, unsigned int desc_size) 33 { 34 int err; 35 36 cq->index = index; 37 cq->vdev = vdev; 38 39 cq->ctrl = svnic_dev_get_res(vdev, RES_TYPE_CQ, index); 40 if (!cq->ctrl) { 41 pr_err("Failed to hook CQ[%d] resource\n", index); 42 43 return -EINVAL; 44 } 45 46 err = svnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size); 47 if (err) 48 return err; 49 50 return 0; 51 } 52 53 void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable, 54 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail, 55 unsigned int cq_tail_color, unsigned int interrupt_enable, 56 unsigned int cq_entry_enable, unsigned int cq_message_enable, 57 unsigned int interrupt_offset, u64 cq_message_addr) 58 { 59 u64 paddr; 60 61 paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET; 62 writeq(paddr, &cq->ctrl->ring_base); 63 iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size); 64 iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable); 65 iowrite32(color_enable, &cq->ctrl->color_enable); 66 iowrite32(cq_head, &cq->ctrl->cq_head); 67 iowrite32(cq_tail, &cq->ctrl->cq_tail); 68 iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color); 69 iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable); 70 iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable); 71 iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable); 72 iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset); 73 writeq(cq_message_addr, &cq->ctrl->cq_message_addr); 74 } 75 76 void svnic_cq_clean(struct vnic_cq *cq) 77 { 78 cq->to_clean = 0; 79 cq->last_color = 0; 80 81 iowrite32(0, &cq->ctrl->cq_head); 82 iowrite32(0, &cq->ctrl->cq_tail); 83 iowrite32(1, &cq->ctrl->cq_tail_color); 84 85 svnic_dev_clear_desc_ring(&cq->ring); 86 } 87