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-rw-r--r--drivers/net/enic/vnic_rq.c221
1 files changed, 0 insertions, 221 deletions
diff --git a/drivers/net/enic/vnic_rq.c b/drivers/net/enic/vnic_rq.c
deleted file mode 100644
index 34105e0951a5..000000000000
--- a/drivers/net/enic/vnic_rq.c
+++ /dev/null
@@ -1,221 +0,0 @@
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_rq.h"
29
30static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
31{
32 struct vnic_rq_buf *buf;
33 struct vnic_dev *vdev;
34 unsigned int i, j, count = rq->ring.desc_count;
35 unsigned int blks = VNIC_RQ_BUF_BLKS_NEEDED(count);
36
37 vdev = rq->vdev;
38
39 for (i = 0; i < blks; i++) {
40 rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ(count), GFP_ATOMIC);
41 if (!rq->bufs[i]) {
42 pr_err("Failed to alloc rq_bufs\n");
43 return -ENOMEM;
44 }
45 }
46
47 for (i = 0; i < blks; i++) {
48 buf = rq->bufs[i];
49 for (j = 0; j < VNIC_RQ_BUF_BLK_ENTRIES(count); j++) {
50 buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES(count) + j;
51 buf->desc = (u8 *)rq->ring.descs +
52 rq->ring.desc_size * buf->index;
53 if (buf->index + 1 == count) {
54 buf->next = rq->bufs[0];
55 break;
56 } else if (j + 1 == VNIC_RQ_BUF_BLK_ENTRIES(count)) {
57 buf->next = rq->bufs[i + 1];
58 } else {
59 buf->next = buf + 1;
60 buf++;
61 }
62 }
63 }
64
65 rq->to_use = rq->to_clean = rq->bufs[0];
66
67 return 0;
68}
69
70void vnic_rq_free(struct vnic_rq *rq)
71{
72 struct vnic_dev *vdev;
73 unsigned int i;
74
75 vdev = rq->vdev;
76
77 vnic_dev_free_desc_ring(vdev, &rq->ring);
78
79 for (i = 0; i < VNIC_RQ_BUF_BLKS_MAX; i++) {
80 if (rq->bufs[i]) {
81 kfree(rq->bufs[i]);
82 rq->bufs[i] = NULL;
83 }
84 }
85
86 rq->ctrl = NULL;
87}
88
89int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
90 unsigned int desc_count, unsigned int desc_size)
91{
92 int err;
93
94 rq->index = index;
95 rq->vdev = vdev;
96
97 rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index);
98 if (!rq->ctrl) {
99 pr_err("Failed to hook RQ[%d] resource\n", index);
100 return -EINVAL;
101 }
102
103 vnic_rq_disable(rq);
104
105 err = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size);
106 if (err)
107 return err;
108
109 err = vnic_rq_alloc_bufs(rq);
110 if (err) {
111 vnic_rq_free(rq);
112 return err;
113 }
114
115 return 0;
116}
117
118static void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
119 unsigned int fetch_index, unsigned int posted_index,
120 unsigned int error_interrupt_enable,
121 unsigned int error_interrupt_offset)
122{
123 u64 paddr;
124 unsigned int count = rq->ring.desc_count;
125
126 paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET;
127 writeq(paddr, &rq->ctrl->ring_base);
128 iowrite32(count, &rq->ctrl->ring_size);
129 iowrite32(cq_index, &rq->ctrl->cq_index);
130 iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
131 iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset);
132 iowrite32(0, &rq->ctrl->dropped_packet_count);
133 iowrite32(0, &rq->ctrl->error_status);
134 iowrite32(fetch_index, &rq->ctrl->fetch_index);
135 iowrite32(posted_index, &rq->ctrl->posted_index);
136
137 rq->to_use = rq->to_clean =
138 &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES(count)]
139 [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES(count)];
140}
141
142void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
143 unsigned int error_interrupt_enable,
144 unsigned int error_interrupt_offset)
145{
146 u32 fetch_index;
147
148 /* Use current fetch_index as the ring starting point */
149 fetch_index = ioread32(&rq->ctrl->fetch_index);
150
151 if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */
152 /* Hardware surprise removal: reset fetch_index */
153 fetch_index = 0;
154 }
155
156 vnic_rq_init_start(rq, cq_index,
157 fetch_index, fetch_index,
158 error_interrupt_enable,
159 error_interrupt_offset);
160}
161
162unsigned int vnic_rq_error_status(struct vnic_rq *rq)
163{
164 return ioread32(&rq->ctrl->error_status);
165}
166
167void vnic_rq_enable(struct vnic_rq *rq)
168{
169 iowrite32(1, &rq->ctrl->enable);
170}
171
172int vnic_rq_disable(struct vnic_rq *rq)
173{
174 unsigned int wait;
175
176 iowrite32(0, &rq->ctrl->enable);
177
178 /* Wait for HW to ACK disable request */
179 for (wait = 0; wait < 1000; wait++) {
180 if (!(ioread32(&rq->ctrl->running)))
181 return 0;
182 udelay(10);
183 }
184
185 pr_err("Failed to disable RQ[%d]\n", rq->index);
186
187 return -ETIMEDOUT;
188}
189
190void vnic_rq_clean(struct vnic_rq *rq,
191 void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf))
192{
193 struct vnic_rq_buf *buf;
194 u32 fetch_index;
195 unsigned int count = rq->ring.desc_count;
196
197 buf = rq->to_clean;
198
199 while (vnic_rq_desc_used(rq) > 0) {
200
201 (*buf_clean)(rq, buf);
202
203 buf = rq->to_clean = buf->next;
204 rq->ring.desc_avail++;
205 }
206
207 /* Use current fetch_index as the ring starting point */
208 fetch_index = ioread32(&rq->ctrl->fetch_index);
209
210 if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */
211 /* Hardware surprise removal: reset fetch_index */
212 fetch_index = 0;
213 }
214 rq->to_use = rq->to_clean =
215 &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES(count)]
216 [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES(count)];
217 iowrite32(fetch_index, &rq->ctrl->posted_index);
218
219 vnic_dev_clear_desc_ring(&rq->ring);
220}
221
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-08 01:04:51 -0500