1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright 2014 Cisco Systems, Inc. All rights reserved. 3 4 #include <linux/kernel.h> 5 #include <linux/errno.h> 6 #include <linux/types.h> 7 #include <linux/pci.h> 8 #include <linux/delay.h> 9 #include "vnic_dev.h" 10 #include "vnic_intr.h" 11 12 void svnic_intr_free(struct vnic_intr *intr) 13 { 14 intr->ctrl = NULL; 15 } 16 17 int svnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, 18 unsigned int index) 19 { 20 intr->index = index; 21 intr->vdev = vdev; 22 23 intr->ctrl = svnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index); 24 if (!intr->ctrl) { 25 pr_err("Failed to hook INTR[%d].ctrl resource\n", 26 index); 27 return -EINVAL; 28 } 29 30 return 0; 31 } 32 33 void svnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer, 34 unsigned int coalescing_type, unsigned int mask_on_assertion) 35 { 36 iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer); 37 iowrite32(coalescing_type, &intr->ctrl->coalescing_type); 38 iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion); 39 iowrite32(0, &intr->ctrl->int_credits); 40 } 41 42 void svnic_intr_clean(struct vnic_intr *intr) 43 { 44 iowrite32(0, &intr->ctrl->int_credits); 45 } 46