1 /* 2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 * 5 * This program is free software; you may redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 16 * SOFTWARE. 17 * 18 */ 19 20 #include <linux/kernel.h> 21 #include <linux/errno.h> 22 #include <linux/types.h> 23 #include <linux/pci.h> 24 25 #include "vnic_dev.h" 26 #include "vnic_cq.h" 27 28 void vnic_cq_free(struct vnic_cq *cq) 29 { 30 vnic_dev_free_desc_ring(cq->vdev, &cq->ring); 31 32 cq->ctrl = NULL; 33 } 34 35 int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index, 36 unsigned int desc_count, unsigned int desc_size) 37 { 38 int err; 39 40 cq->index = index; 41 cq->vdev = vdev; 42 43 cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index); 44 if (!cq->ctrl) { 45 pr_err("Failed to hook CQ[%d] resource\n", index); 46 return -EINVAL; 47 } 48 49 err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size); 50 if (err) 51 return err; 52 53 return 0; 54 } 55 56 void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable, 57 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail, 58 unsigned int cq_tail_color, unsigned int interrupt_enable, 59 unsigned int cq_entry_enable, unsigned int cq_message_enable, 60 unsigned int interrupt_offset, u64 cq_message_addr) 61 { 62 u64 paddr; 63 64 paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET; 65 writeq(paddr, &cq->ctrl->ring_base); 66 iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size); 67 iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable); 68 iowrite32(color_enable, &cq->ctrl->color_enable); 69 iowrite32(cq_head, &cq->ctrl->cq_head); 70 iowrite32(cq_tail, &cq->ctrl->cq_tail); 71 iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color); 72 iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable); 73 iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable); 74 iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable); 75 iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset); 76 writeq(cq_message_addr, &cq->ctrl->cq_message_addr); 77 78 cq->interrupt_offset = interrupt_offset; 79 } 80 81 void vnic_cq_clean(struct vnic_cq *cq) 82 { 83 cq->to_clean = 0; 84 cq->last_color = 0; 85 86 iowrite32(0, &cq->ctrl->cq_head); 87 iowrite32(0, &cq->ctrl->cq_tail); 88 iowrite32(1, &cq->ctrl->cq_tail_color); 89 90 vnic_dev_clear_desc_ring(&cq->ring); 91 } 92