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 #include <linux/kernel.h> 20 #include <linux/errno.h> 21 #include <linux/types.h> 22 #include <linux/pci.h> 23 #include <linux/delay.h> 24 #include "vnic_dev.h" 25 #include "vnic_intr.h" 26 27 void vnic_intr_free(struct vnic_intr *intr) 28 { 29 intr->ctrl = NULL; 30 } 31 32 int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, 33 unsigned int index) 34 { 35 intr->index = index; 36 intr->vdev = vdev; 37 38 intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index); 39 if (!intr->ctrl) { 40 printk(KERN_ERR "Failed to hook INTR[%d].ctrl resource\n", 41 index); 42 return -EINVAL; 43 } 44 45 return 0; 46 } 47 48 void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer, 49 unsigned int coalescing_type, unsigned int mask_on_assertion) 50 { 51 iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer); 52 iowrite32(coalescing_type, &intr->ctrl->coalescing_type); 53 iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion); 54 iowrite32(0, &intr->ctrl->int_credits); 55 } 56 57 void vnic_intr_clean(struct vnic_intr *intr) 58 { 59 iowrite32(0, &intr->ctrl->int_credits); 60 } 61