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#include <linux/delay.h> 25 26#include "vnic_dev.h" 27#include "vnic_intr.h" 28 29void vnic_intr_free(struct vnic_intr *intr) 30{ 31 intr->ctrl = NULL; 32} 33 34int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, 35 unsigned int index) 36{ 37 intr->index = index; 38 intr->vdev = vdev; 39 40 intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index); 41 if (!intr->ctrl) { 42 pr_err("Failed to hook INTR[%d].ctrl resource\n", index); 43 return -EINVAL; 44 } 45 46 return 0; 47} 48 49void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer, 50 unsigned int coalescing_type, unsigned int mask_on_assertion) 51{ 52 vnic_intr_coalescing_timer_set(intr, coalescing_timer); 53 iowrite32(coalescing_type, &intr->ctrl->coalescing_type); 54 iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion); 55 iowrite32(0, &intr->ctrl->int_credits); 56} 57 58void vnic_intr_coalescing_timer_set(struct vnic_intr *intr, 59 unsigned int coalescing_timer) 60{ 61 iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer); 62} 63 64void vnic_intr_clean(struct vnic_intr *intr) 65{ 66 iowrite32(0, &intr->ctrl->int_credits); 67} 68 69void vnic_intr_raise(struct vnic_intr *intr) 70{ 71 vnic_dev_raise_intr(intr->vdev, (u16)intr->index); 72} 73