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/errno.h> 20 #include <linux/types.h> 21 #include <linux/pci.h> 22 #include <linux/delay.h> 23 #include "vnic_wq_copy.h" 24 25 void vnic_wq_copy_enable(struct vnic_wq_copy *wq) 26 { 27 iowrite32(1, &wq->ctrl->enable); 28 } 29 30 int vnic_wq_copy_disable(struct vnic_wq_copy *wq) 31 { 32 unsigned int wait; 33 34 iowrite32(0, &wq->ctrl->enable); 35 36 /* Wait for HW to ACK disable request */ 37 for (wait = 0; wait < 100; wait++) { 38 if (!(ioread32(&wq->ctrl->running))) 39 return 0; 40 udelay(1); 41 } 42 43 printk(KERN_ERR "Failed to disable Copy WQ[%d]," 44 " fetch index=%d, posted_index=%d\n", 45 wq->index, ioread32(&wq->ctrl->fetch_index), 46 ioread32(&wq->ctrl->posted_index)); 47 48 return -ENODEV; 49 } 50 51 void vnic_wq_copy_clean(struct vnic_wq_copy *wq, 52 void (*q_clean)(struct vnic_wq_copy *wq, 53 struct fcpio_host_req *wq_desc)) 54 { 55 BUG_ON(ioread32(&wq->ctrl->enable)); 56 57 if (vnic_wq_copy_desc_in_use(wq)) 58 vnic_wq_copy_service(wq, -1, q_clean); 59 60 wq->to_use_index = wq->to_clean_index = 0; 61 62 iowrite32(0, &wq->ctrl->fetch_index); 63 iowrite32(0, &wq->ctrl->posted_index); 64 iowrite32(0, &wq->ctrl->error_status); 65 66 vnic_dev_clear_desc_ring(&wq->ring); 67 } 68 69 void vnic_wq_copy_free(struct vnic_wq_copy *wq) 70 { 71 struct vnic_dev *vdev; 72 73 vdev = wq->vdev; 74 vnic_dev_free_desc_ring(vdev, &wq->ring); 75 wq->ctrl = NULL; 76 } 77 78 int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq, 79 unsigned int index, unsigned int desc_count, 80 unsigned int desc_size) 81 { 82 int err; 83 84 wq->index = index; 85 wq->vdev = vdev; 86 wq->to_use_index = wq->to_clean_index = 0; 87 wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index); 88 if (!wq->ctrl) { 89 printk(KERN_ERR "Failed to hook COPY WQ[%d] resource\n", index); 90 return -EINVAL; 91 } 92 93 vnic_wq_copy_disable(wq); 94 95 err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size); 96 if (err) 97 return err; 98 99 return 0; 100 } 101 102 void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index, 103 unsigned int error_interrupt_enable, 104 unsigned int error_interrupt_offset) 105 { 106 u64 paddr; 107 108 paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET; 109 writeq(paddr, &wq->ctrl->ring_base); 110 iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size); 111 iowrite32(0, &wq->ctrl->fetch_index); 112 iowrite32(0, &wq->ctrl->posted_index); 113 iowrite32(cq_index, &wq->ctrl->cq_index); 114 iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable); 115 iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset); 116 } 117 118