2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 * Copyright (c) 2014, Cisco Systems, Inc.
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38 void vnic_rq_free(struct vnic_rq *rq)
40 struct vnic_dev *vdev;
44 vnic_dev_free_desc_ring(vdev, &rq->ring);
49 int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
50 unsigned int desc_count, unsigned int desc_size)
53 char res_name[NAME_MAX];
59 rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index);
61 pr_err("Failed to hook RQ[%d] resource\n", index);
67 snprintf(res_name, sizeof(res_name), "%d-rq-%d", instance++, index);
68 rc = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size,
69 rq->socket_id, res_name);
73 void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
74 unsigned int fetch_index, unsigned int posted_index,
75 unsigned int error_interrupt_enable,
76 unsigned int error_interrupt_offset)
79 unsigned int count = rq->ring.desc_count;
81 paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET;
82 writeq(paddr, &rq->ctrl->ring_base);
83 iowrite32(count, &rq->ctrl->ring_size);
84 iowrite32(cq_index, &rq->ctrl->cq_index);
85 iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
86 iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset);
87 iowrite32(0, &rq->ctrl->error_status);
88 iowrite32(fetch_index, &rq->ctrl->fetch_index);
89 iowrite32(posted_index, &rq->ctrl->posted_index);
91 iowrite32(((rq->is_sop << 10) | rq->data_queue_idx),
92 &rq->ctrl->data_ring);
95 void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
96 unsigned int error_interrupt_enable,
97 unsigned int error_interrupt_offset)
101 /* Use current fetch_index as the ring starting point */
102 fetch_index = ioread32(&rq->ctrl->fetch_index);
104 if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */
105 /* Hardware surprise removal: reset fetch_index */
109 vnic_rq_init_start(rq, cq_index,
110 fetch_index, fetch_index,
111 error_interrupt_enable,
112 error_interrupt_offset);
115 rq->pkt_first_seg = NULL;
116 rq->pkt_last_seg = NULL;
119 void vnic_rq_error_out(struct vnic_rq *rq, unsigned int error)
121 iowrite32(error, &rq->ctrl->error_status);
124 unsigned int vnic_rq_error_status(struct vnic_rq *rq)
126 return ioread32(&rq->ctrl->error_status);
129 void vnic_rq_enable(struct vnic_rq *rq)
131 iowrite32(1, &rq->ctrl->enable);
134 int vnic_rq_disable(struct vnic_rq *rq)
138 iowrite32(0, &rq->ctrl->enable);
140 /* Wait for HW to ACK disable request */
141 for (wait = 0; wait < 1000; wait++) {
142 if (!(ioread32(&rq->ctrl->running)))
147 pr_err("Failed to disable RQ[%d]\n", rq->index);
152 void vnic_rq_clean(struct vnic_rq *rq,
153 void (*buf_clean)(struct rte_mbuf **buf))
155 struct rte_mbuf **buf;
157 unsigned int count = rq->ring.desc_count;
159 buf = &rq->mbuf_ring[0];
161 for (i = 0; i < count; i++) {
165 rq->ring.desc_avail = count - 1;
168 /* Use current fetch_index as the ring starting point */
169 fetch_index = ioread32(&rq->ctrl->fetch_index);
171 if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */
172 /* Hardware surprise removal: reset fetch_index */
176 iowrite32(fetch_index, &rq->ctrl->posted_index);
178 vnic_dev_clear_desc_ring(&rq->ring);