diff options
Diffstat (limited to 'drivers/net/enic/base/vnic_rq.c')
| -rw-r--r-- | drivers/net/enic/base/vnic_rq.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/drivers/net/enic/base/vnic_rq.c b/drivers/net/enic/base/vnic_rq.c new file mode 100644 index 00000000..cb62c5e5 --- /dev/null +++ b/drivers/net/enic/base/vnic_rq.c @@ -0,0 +1,175 @@ +/* + * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. + * Copyright 2007 Nuova Systems, Inc. All rights reserved. + * + * Copyright (c) 2014, Cisco Systems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "vnic_dev.h" +#include "vnic_rq.h" + +void vnic_rq_free(struct vnic_rq *rq) +{ + struct vnic_dev *vdev; + + vdev = rq->vdev; + + vnic_dev_free_desc_ring(vdev, &rq->ring); + + rq->ctrl = NULL; +} + +int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index, + unsigned int desc_count, unsigned int desc_size) +{ + int rc; + char res_name[NAME_MAX]; + static int instance; + + rq->index = index; + rq->vdev = vdev; + + rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index); + if (!rq->ctrl) { + pr_err("Failed to hook RQ[%d] resource\n", index); + return -EINVAL; + } + + vnic_rq_disable(rq); + + snprintf(res_name, sizeof(res_name), "%d-rq-%d", instance++, index); + rc = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size, + rq->socket_id, res_name); + return rc; +} + +void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index, + unsigned int fetch_index, unsigned int posted_index, + unsigned int error_interrupt_enable, + unsigned int error_interrupt_offset) +{ + u64 paddr; + unsigned int count = rq->ring.desc_count; + + paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET; + writeq(paddr, &rq->ctrl->ring_base); + iowrite32(count, &rq->ctrl->ring_size); + iowrite32(cq_index, &rq->ctrl->cq_index); + iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable); + iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset); + iowrite32(0, &rq->ctrl->dropped_packet_count); + iowrite32(0, &rq->ctrl->error_status); + iowrite32(fetch_index, &rq->ctrl->fetch_index); + iowrite32(posted_index, &rq->ctrl->posted_index); + +} + +void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index, + unsigned int error_interrupt_enable, + unsigned int error_interrupt_offset) +{ + u32 fetch_index = 0; + /* Use current fetch_index as the ring starting point */ + fetch_index = ioread32(&rq->ctrl->fetch_index); + + if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */ + /* Hardware surprise removal: reset fetch_index */ + fetch_index = 0; + } + + vnic_rq_init_start(rq, cq_index, + fetch_index, fetch_index, + error_interrupt_enable, + error_interrupt_offset); + rq->rxst_idx = 0; + rq->tot_pkts = 0; +} + +void vnic_rq_error_out(struct vnic_rq *rq, unsigned int error) +{ + iowrite32(error, &rq->ctrl->error_status); +} + +unsigned int vnic_rq_error_status(struct vnic_rq *rq) +{ + return ioread32(&rq->ctrl->error_status); +} + +void vnic_rq_enable(struct vnic_rq *rq) +{ + iowrite32(1, &rq->ctrl->enable); +} + +int vnic_rq_disable(struct vnic_rq *rq) +{ + unsigned int wait; + + iowrite32(0, &rq->ctrl->enable); + + /* Wait for HW to ACK disable request */ + for (wait = 0; wait < 1000; wait++) { + if (!(ioread32(&rq->ctrl->running))) + return 0; + udelay(10); + } + + pr_err("Failed to disable RQ[%d]\n", rq->index); + + return -ETIMEDOUT; +} + +void vnic_rq_clean(struct vnic_rq *rq, + void (*buf_clean)(struct rte_mbuf **buf)) +{ + struct rte_mbuf **buf; + u32 fetch_index, i; + unsigned int count = rq->ring.desc_count; + + buf = &rq->mbuf_ring[0]; + + for (i = 0; i < count; i++) { + (*buf_clean)(buf); + buf++; + } + rq->ring.desc_avail = count - 1; + rq->rx_nb_hold = 0; + + /* Use current fetch_index as the ring starting point */ + fetch_index = ioread32(&rq->ctrl->fetch_index); + + if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */ + /* Hardware surprise removal: reset fetch_index */ + fetch_index = 0; + } + + iowrite32(fetch_index, &rq->ctrl->posted_index); + + vnic_dev_clear_desc_ring(&rq->ring); +} |