| Scott Feldman | 01f2e4e | 2008-09-15 09:17:11 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008 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 | printk(KERN_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 | |
| 79 | void vnic_cq_clean(struct vnic_cq *cq) |
| 80 | { |
| 81 | cq->to_clean = 0; |
| 82 | cq->last_color = 0; |
| 83 | |
| 84 | iowrite32(0, &cq->ctrl->cq_head); |
| 85 | iowrite32(0, &cq->ctrl->cq_tail); |
| 86 | iowrite32(1, &cq->ctrl->cq_tail_color); |
| 87 | |
| 88 | vnic_dev_clear_desc_ring(&cq->ring); |
| 89 | } |