101f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman/* 229046f9b1e36f6e3332ce2d8e366005fd177b37aVasanthy Kolluri * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. 301f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * Copyright 2007 Nuova Systems, Inc. All rights reserved. 401f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * 501f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * This program is free software; you may redistribute it and/or modify 601f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * it under the terms of the GNU General Public License as published by 701f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * the Free Software Foundation; version 2 of the License. 801f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * 901f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 1001f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 1101f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 1201f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 1301f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 1401f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 1501f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 1601f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * SOFTWARE. 1701f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman * 1801f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman */ 1901f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman 2001f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman#include <linux/kernel.h> 2101f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman#include <linux/errno.h> 2201f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman#include <linux/types.h> 2301f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman#include <linux/pci.h> 2401f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman#include <linux/delay.h> 2501f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman 2601f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman#include "vnic_dev.h" 2701f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman#include "vnic_intr.h" 2801f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman 2901f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldmanvoid vnic_intr_free(struct vnic_intr *intr) 3001f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman{ 3101f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman intr->ctrl = NULL; 3201f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman} 3301f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman 3401f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldmanint vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, 3501f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman unsigned int index) 3601f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman{ 3701f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman intr->index = index; 3801f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman intr->vdev = vdev; 3901f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman 4001f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index); 4101f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman if (!intr->ctrl) { 42a7a79debcca02fbf908c0abed8d8fb25d0e51b48Vasanthy Kolluri pr_err("Failed to hook INTR[%d].ctrl resource\n", index); 4301f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman return -EINVAL; 4401f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman } 4501f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman 4601f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman return 0; 4701f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman} 4801f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman 49ea7ea65a3b37bf207d5c352ac6254506b3dc3901Vasanthy Kollurivoid vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer, 5001f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman unsigned int coalescing_type, unsigned int mask_on_assertion) 5101f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman{ 527c8445991172cc17eaca9f7de0a300c02caaa49dScott Feldman vnic_intr_coalescing_timer_set(intr, coalescing_timer); 5301f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman iowrite32(coalescing_type, &intr->ctrl->coalescing_type); 5401f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion); 5501f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman iowrite32(0, &intr->ctrl->int_credits); 5601f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman} 5701f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman 587c8445991172cc17eaca9f7de0a300c02caaa49dScott Feldmanvoid vnic_intr_coalescing_timer_set(struct vnic_intr *intr, 59ea7ea65a3b37bf207d5c352ac6254506b3dc3901Vasanthy Kolluri u32 coalescing_timer) 607c8445991172cc17eaca9f7de0a300c02caaa49dScott Feldman{ 61ea7ea65a3b37bf207d5c352ac6254506b3dc3901Vasanthy Kolluri iowrite32(vnic_dev_intr_coal_timer_usec_to_hw(intr->vdev, 62ea7ea65a3b37bf207d5c352ac6254506b3dc3901Vasanthy Kolluri coalescing_timer), &intr->ctrl->coalescing_timer); 637c8445991172cc17eaca9f7de0a300c02caaa49dScott Feldman} 647c8445991172cc17eaca9f7de0a300c02caaa49dScott Feldman 6501f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldmanvoid vnic_intr_clean(struct vnic_intr *intr) 6601f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman{ 6701f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman iowrite32(0, &intr->ctrl->int_credits); 6801f2e4ead2c51226ed1283ef6a8388ca6f4cff8fScott Feldman} 69