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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 */
6
7#include <linux/kernel.h>
8#include <linux/errno.h>
9#include <linux/types.h>
10#include <linux/pci.h>
11#include <linux/delay.h>
12#include <linux/slab.h>
13
14#include "vnic_dev.h"
15#include "vnic_wq.h"
16#include "enic.h"
17
18static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
19{
20 struct vnic_wq_buf *buf;
21 unsigned int i, j, count = wq->ring.desc_count;
22 unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
23
24 for (i = 0; i < blks; i++) {
25 wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_KERNEL);
26 if (!wq->bufs[i])
27 return -ENOMEM;
28 }
29
30 for (i = 0; i < blks; i++) {
31 buf = wq->bufs[i];
32 for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES(count); j++) {
33 buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES(count) + j;
34 buf->desc = (u8 *)wq->ring.descs +
35 wq->ring.desc_size * buf->index;
36 if (buf->index + 1 == count) {
37 buf->next = wq->bufs[0];
38 buf->next->prev = buf;
39 break;
40 } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES(count)) {
41 buf->next = wq->bufs[i + 1];
42 buf->next->prev = buf;
43 } else {
44 buf->next = buf + 1;
45 buf->next->prev = buf;
46 buf++;
47 }
48 }
49 }
50
51 wq->to_use = wq->to_clean = wq->bufs[0];
52
53 return 0;
54}
55
56void vnic_wq_free(struct vnic_wq *wq)
57{
58 struct vnic_dev *vdev;
59 unsigned int i;
60
61 vdev = wq->vdev;
62
63 vnic_dev_free_desc_ring(vdev, &wq->ring);
64
65 for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
66 if (wq->bufs[i]) {
67 kfree(wq->bufs[i]);
68 wq->bufs[i] = NULL;
69 }
70 }
71
72 wq->ctrl = NULL;
73}
74
75int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
76 unsigned int desc_count, unsigned int desc_size)
77{
78 int err;
79
80 wq->index = index;
81 wq->vdev = vdev;
82
83 wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
84 if (!wq->ctrl) {
85 vdev_err(vdev, "Failed to hook WQ[%d] resource\n", index);
86 return -EINVAL;
87 }
88
89 vnic_wq_disable(wq);
90
91 err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
92 if (err)
93 return err;
94
95 err = vnic_wq_alloc_bufs(wq);
96 if (err) {
97 vnic_wq_free(wq);
98 return err;
99 }
100
101 return 0;
102}
103
104int enic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq,
105 unsigned int desc_count, unsigned int desc_size)
106{
107 int err;
108
109 wq->index = 0;
110 wq->vdev = vdev;
111
112 wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
113 if (!wq->ctrl)
114 return -EINVAL;
115 vnic_wq_disable(wq);
116 err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
117
118 return err;
119}
120
121void enic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
122 unsigned int fetch_index, unsigned int posted_index,
123 unsigned int error_interrupt_enable,
124 unsigned int error_interrupt_offset)
125{
126 u64 paddr;
127 unsigned int count = wq->ring.desc_count;
128
129 paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
130 writeq(paddr, &wq->ctrl->ring_base);
131 iowrite32(count, &wq->ctrl->ring_size);
132 iowrite32(fetch_index, &wq->ctrl->fetch_index);
133 iowrite32(posted_index, &wq->ctrl->posted_index);
134 iowrite32(cq_index, &wq->ctrl->cq_index);
135 iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
136 iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
137 iowrite32(0, &wq->ctrl->error_status);
138
139 wq->to_use = wq->to_clean =
140 &wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES(count)]
141 [fetch_index % VNIC_WQ_BUF_BLK_ENTRIES(count)];
142}
143
144void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
145 unsigned int error_interrupt_enable,
146 unsigned int error_interrupt_offset)
147{
148 enic_wq_init_start(wq, cq_index, 0, 0,
149 error_interrupt_enable,
150 error_interrupt_offset);
151}
152
153unsigned int vnic_wq_error_status(struct vnic_wq *wq)
154{
155 return ioread32(&wq->ctrl->error_status);
156}
157
158void vnic_wq_enable(struct vnic_wq *wq)
159{
160 iowrite32(1, &wq->ctrl->enable);
161}
162
163int vnic_wq_disable(struct vnic_wq *wq)
164{
165 unsigned int wait;
166 struct vnic_dev *vdev = wq->vdev;
167
168 iowrite32(0, &wq->ctrl->enable);
169
170 /* Wait for HW to ACK disable request */
171 for (wait = 0; wait < 1000; wait++) {
172 if (!(ioread32(&wq->ctrl->running)))
173 return 0;
174 udelay(10);
175 }
176
177 vdev_neterr(vdev, "Failed to disable WQ[%d]\n", wq->index);
178
179 return -ETIMEDOUT;
180}
181
182void vnic_wq_clean(struct vnic_wq *wq,
183 void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
184{
185 struct vnic_wq_buf *buf;
186
187 buf = wq->to_clean;
188
189 while (vnic_wq_desc_used(wq) > 0) {
190
191 (*buf_clean)(wq, buf);
192
193 buf = wq->to_clean = buf->next;
194 wq->ring.desc_avail++;
195 }
196
197 wq->to_use = wq->to_clean = wq->bufs[0];
198
199 iowrite32(0, &wq->ctrl->fetch_index);
200 iowrite32(0, &wq->ctrl->posted_index);
201 iowrite32(0, &wq->ctrl->error_status);
202
203 vnic_dev_clear_desc_ring(&wq->ring);
204}
1/*
2 * Copyright 2008-2010 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
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/pci.h>
24#include <linux/delay.h>
25#include <linux/slab.h>
26
27#include "vnic_dev.h"
28#include "vnic_wq.h"
29#include "enic.h"
30
31static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
32{
33 struct vnic_wq_buf *buf;
34 unsigned int i, j, count = wq->ring.desc_count;
35 unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
36
37 for (i = 0; i < blks; i++) {
38 wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_KERNEL);
39 if (!wq->bufs[i])
40 return -ENOMEM;
41 }
42
43 for (i = 0; i < blks; i++) {
44 buf = wq->bufs[i];
45 for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES(count); j++) {
46 buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES(count) + j;
47 buf->desc = (u8 *)wq->ring.descs +
48 wq->ring.desc_size * buf->index;
49 if (buf->index + 1 == count) {
50 buf->next = wq->bufs[0];
51 buf->next->prev = buf;
52 break;
53 } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES(count)) {
54 buf->next = wq->bufs[i + 1];
55 buf->next->prev = buf;
56 } else {
57 buf->next = buf + 1;
58 buf->next->prev = buf;
59 buf++;
60 }
61 }
62 }
63
64 wq->to_use = wq->to_clean = wq->bufs[0];
65
66 return 0;
67}
68
69void vnic_wq_free(struct vnic_wq *wq)
70{
71 struct vnic_dev *vdev;
72 unsigned int i;
73
74 vdev = wq->vdev;
75
76 vnic_dev_free_desc_ring(vdev, &wq->ring);
77
78 for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
79 if (wq->bufs[i]) {
80 kfree(wq->bufs[i]);
81 wq->bufs[i] = NULL;
82 }
83 }
84
85 wq->ctrl = NULL;
86}
87
88int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
89 unsigned int desc_count, unsigned int desc_size)
90{
91 int err;
92
93 wq->index = index;
94 wq->vdev = vdev;
95
96 wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
97 if (!wq->ctrl) {
98 vdev_err(vdev, "Failed to hook WQ[%d] resource\n", index);
99 return -EINVAL;
100 }
101
102 vnic_wq_disable(wq);
103
104 err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
105 if (err)
106 return err;
107
108 err = vnic_wq_alloc_bufs(wq);
109 if (err) {
110 vnic_wq_free(wq);
111 return err;
112 }
113
114 return 0;
115}
116
117int enic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq,
118 unsigned int desc_count, unsigned int desc_size)
119{
120 int err;
121
122 wq->index = 0;
123 wq->vdev = vdev;
124
125 wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
126 if (!wq->ctrl)
127 return -EINVAL;
128 vnic_wq_disable(wq);
129 err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
130
131 return err;
132}
133
134void enic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
135 unsigned int fetch_index, unsigned int posted_index,
136 unsigned int error_interrupt_enable,
137 unsigned int error_interrupt_offset)
138{
139 u64 paddr;
140 unsigned int count = wq->ring.desc_count;
141
142 paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
143 writeq(paddr, &wq->ctrl->ring_base);
144 iowrite32(count, &wq->ctrl->ring_size);
145 iowrite32(fetch_index, &wq->ctrl->fetch_index);
146 iowrite32(posted_index, &wq->ctrl->posted_index);
147 iowrite32(cq_index, &wq->ctrl->cq_index);
148 iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
149 iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
150 iowrite32(0, &wq->ctrl->error_status);
151
152 wq->to_use = wq->to_clean =
153 &wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES(count)]
154 [fetch_index % VNIC_WQ_BUF_BLK_ENTRIES(count)];
155}
156
157void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
158 unsigned int error_interrupt_enable,
159 unsigned int error_interrupt_offset)
160{
161 enic_wq_init_start(wq, cq_index, 0, 0,
162 error_interrupt_enable,
163 error_interrupt_offset);
164}
165
166unsigned int vnic_wq_error_status(struct vnic_wq *wq)
167{
168 return ioread32(&wq->ctrl->error_status);
169}
170
171void vnic_wq_enable(struct vnic_wq *wq)
172{
173 iowrite32(1, &wq->ctrl->enable);
174}
175
176int vnic_wq_disable(struct vnic_wq *wq)
177{
178 unsigned int wait;
179 struct vnic_dev *vdev = wq->vdev;
180
181 iowrite32(0, &wq->ctrl->enable);
182
183 /* Wait for HW to ACK disable request */
184 for (wait = 0; wait < 1000; wait++) {
185 if (!(ioread32(&wq->ctrl->running)))
186 return 0;
187 udelay(10);
188 }
189
190 vdev_neterr(vdev, "Failed to disable WQ[%d]\n", wq->index);
191
192 return -ETIMEDOUT;
193}
194
195void vnic_wq_clean(struct vnic_wq *wq,
196 void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
197{
198 struct vnic_wq_buf *buf;
199
200 buf = wq->to_clean;
201
202 while (vnic_wq_desc_used(wq) > 0) {
203
204 (*buf_clean)(wq, buf);
205
206 buf = wq->to_clean = buf->next;
207 wq->ring.desc_avail++;
208 }
209
210 wq->to_use = wq->to_clean = wq->bufs[0];
211
212 iowrite32(0, &wq->ctrl->fetch_index);
213 iowrite32(0, &wq->ctrl->posted_index);
214 iowrite32(0, &wq->ctrl->error_status);
215
216 vnic_dev_clear_desc_ring(&wq->ring);
217}