1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. 4 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/errno.h> 9 #include <linux/types.h> 10 #include <linux/pci.h> 11 #include <linux/delay.h> 12 13 #include "vnic_dev.h" 14 #include "vnic_intr.h" 15 #include "enic.h" 16 17 void vnic_intr_free(struct vnic_intr *intr) 18 { 19 intr->ctrl = NULL; 20 } 21 22 int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, 23 unsigned int index) 24 { 25 intr->index = index; 26 intr->vdev = vdev; 27 28 intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index); 29 if (!intr->ctrl) { 30 vdev_err(vdev, "Failed to hook INTR[%d].ctrl resource\n", 31 index); 32 return -EINVAL; 33 } 34 35 return 0; 36 } 37 38 void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer, 39 unsigned int coalescing_type, unsigned int mask_on_assertion) 40 { 41 vnic_intr_coalescing_timer_set(intr, coalescing_timer); 42 iowrite32(coalescing_type, &intr->ctrl->coalescing_type); 43 iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion); 44 iowrite32(0, &intr->ctrl->int_credits); 45 } 46 47 void vnic_intr_coalescing_timer_set(struct vnic_intr *intr, 48 u32 coalescing_timer) 49 { 50 iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(intr->vdev, 51 coalescing_timer), &intr->ctrl->coalescing_timer); 52 } 53 54 void vnic_intr_clean(struct vnic_intr *intr) 55 { 56 iowrite32(0, &intr->ctrl->int_credits); 57 } 58