1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2008-2017 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 */
5
6 #include "vnic_dev.h"
7 #include "vnic_wq.h"
8
9 static inline
vnic_wq_get_ctrl(struct vnic_dev * vdev,struct vnic_wq * wq,unsigned int index,enum vnic_res_type res_type)10 int vnic_wq_get_ctrl(struct vnic_dev *vdev, struct vnic_wq *wq,
11 unsigned int index, enum vnic_res_type res_type)
12 {
13 wq->ctrl = vnic_dev_get_res(vdev, res_type, index);
14 if (!wq->ctrl)
15 return -EINVAL;
16 return 0;
17 }
18
19 static inline
vnic_wq_alloc_ring(struct vnic_dev * vdev,struct vnic_wq * wq,unsigned int desc_count,unsigned int desc_size)20 int vnic_wq_alloc_ring(struct vnic_dev *vdev, struct vnic_wq *wq,
21 unsigned int desc_count, unsigned int desc_size)
22 {
23 char res_name[RTE_MEMZONE_NAMESIZE];
24 static int instance;
25
26 snprintf(res_name, sizeof(res_name), "%d-wq-%u", instance++, wq->index);
27 return vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size,
28 wq->socket_id, res_name);
29 }
30
vnic_wq_alloc_bufs(struct vnic_wq * wq)31 static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
32 {
33 unsigned int count = wq->ring.desc_count;
34 /* Allocate the mbuf ring */
35 wq->bufs = (struct rte_mbuf **)rte_zmalloc_socket("wq->bufs",
36 sizeof(struct rte_mbuf *) * count,
37 RTE_CACHE_LINE_SIZE, wq->socket_id);
38 wq->head_idx = 0;
39 wq->tail_idx = 0;
40 if (wq->bufs == NULL)
41 return -ENOMEM;
42 return 0;
43 }
44
vnic_wq_free(struct vnic_wq * wq)45 void vnic_wq_free(struct vnic_wq *wq)
46 {
47 struct vnic_dev *vdev;
48
49 vdev = wq->vdev;
50
51 vnic_dev_free_desc_ring(vdev, &wq->ring);
52
53 rte_free(wq->bufs);
54 wq->ctrl = NULL;
55 }
56
57
vnic_wq_alloc(struct vnic_dev * vdev,struct vnic_wq * wq,unsigned int index,unsigned int desc_count,unsigned int desc_size)58 int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
59 unsigned int desc_count, unsigned int desc_size)
60 {
61 int err;
62
63 wq->index = index;
64 wq->vdev = vdev;
65
66 err = vnic_wq_get_ctrl(vdev, wq, index, RES_TYPE_WQ);
67 if (err) {
68 pr_err("Failed to hook WQ[%d] resource, err %d\n", index, err);
69 return err;
70 }
71
72 vnic_wq_disable(wq);
73
74 err = vnic_wq_alloc_ring(vdev, wq, desc_count, desc_size);
75 if (err)
76 return err;
77
78 err = vnic_wq_alloc_bufs(wq);
79 if (err) {
80 vnic_wq_free(wq);
81 return err;
82 }
83
84 return 0;
85 }
86
vnic_wq_init_start(struct vnic_wq * wq,unsigned int cq_index,unsigned int fetch_index,unsigned int posted_index,unsigned int error_interrupt_enable,unsigned int error_interrupt_offset)87 void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
88 unsigned int fetch_index, unsigned int posted_index,
89 unsigned int error_interrupt_enable,
90 unsigned int error_interrupt_offset)
91 {
92 uint64_t paddr;
93 unsigned int count = wq->ring.desc_count;
94
95 paddr = (uint64_t)wq->ring.base_addr | VNIC_PADDR_TARGET;
96 writeq(paddr, &wq->ctrl->ring_base);
97 iowrite32(count, &wq->ctrl->ring_size);
98 iowrite32(fetch_index, &wq->ctrl->fetch_index);
99 iowrite32(posted_index, &wq->ctrl->posted_index);
100 iowrite32(cq_index, &wq->ctrl->cq_index);
101 iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
102 iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
103 iowrite32(0, &wq->ctrl->error_status);
104
105 wq->head_idx = fetch_index;
106 wq->tail_idx = wq->head_idx;
107 }
108
vnic_wq_init(struct vnic_wq * wq,unsigned int cq_index,unsigned int error_interrupt_enable,unsigned int error_interrupt_offset)109 void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
110 unsigned int error_interrupt_enable,
111 unsigned int error_interrupt_offset)
112 {
113 vnic_wq_init_start(wq, cq_index, 0, 0,
114 error_interrupt_enable,
115 error_interrupt_offset);
116 wq->cq_pend = 0;
117 wq->last_completed_index = 0;
118 }
119
vnic_wq_error_status(struct vnic_wq * wq)120 unsigned int vnic_wq_error_status(struct vnic_wq *wq)
121 {
122 return ioread32(&wq->ctrl->error_status);
123 }
124
vnic_wq_enable(struct vnic_wq * wq)125 void vnic_wq_enable(struct vnic_wq *wq)
126 {
127 iowrite32(1, &wq->ctrl->enable);
128 }
129
vnic_wq_disable(struct vnic_wq * wq)130 int vnic_wq_disable(struct vnic_wq *wq)
131 {
132 unsigned int wait;
133
134 iowrite32(0, &wq->ctrl->enable);
135
136 /* Wait for HW to ACK disable request */
137 for (wait = 0; wait < 1000; wait++) {
138 if (!(ioread32(&wq->ctrl->running)))
139 return 0;
140 usleep(10);
141 }
142
143 pr_err("Failed to disable WQ[%d]\n", wq->index);
144
145 return -ETIMEDOUT;
146 }
147
vnic_wq_clean(struct vnic_wq * wq,void (* buf_clean)(struct rte_mbuf ** buf))148 void vnic_wq_clean(struct vnic_wq *wq,
149 void (*buf_clean)(struct rte_mbuf **buf))
150 {
151 struct rte_mbuf **buf;
152 unsigned int to_clean = wq->tail_idx;
153
154 buf = &wq->bufs[to_clean];
155
156 while (vnic_wq_desc_used(wq) > 0) {
157
158 (*buf_clean)(buf);
159 to_clean = buf_idx_incr(wq->ring.desc_count, to_clean);
160
161 buf = &wq->bufs[to_clean];
162 wq->ring.desc_avail++;
163 }
164
165 wq->head_idx = 0;
166 wq->tail_idx = 0;
167 wq->last_completed_index = 0;
168 *((uint32_t *)wq->cqmsg_rz->addr) = 0;
169
170 iowrite32(0, &wq->ctrl->fetch_index);
171 iowrite32(0, &wq->ctrl->posted_index);
172 iowrite32(0, &wq->ctrl->error_status);
173
174 vnic_dev_clear_desc_ring(&wq->ring);
175 }
176