1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2020 Marvell. */
#include "otx2_cpt_common.h"
#include "otx2_cptpf.h"
#include "rvu_reg.h"
static int forward_to_af(struct otx2_cptpf_dev *cptpf,
struct otx2_cptvf_info *vf,
struct mbox_msghdr *req, int size)
{
struct mbox_msghdr *msg;
int ret;
msg = otx2_mbox_alloc_msg(&cptpf->afpf_mbox, 0, size);
if (msg == NULL)
return -ENOMEM;
memcpy((uint8_t *)msg + sizeof(struct mbox_msghdr),
(uint8_t *)req + sizeof(struct mbox_msghdr), size);
msg->id = req->id;
msg->pcifunc = req->pcifunc;
msg->sig = req->sig;
msg->ver = req->ver;
otx2_mbox_msg_send(&cptpf->afpf_mbox, 0);
ret = otx2_mbox_wait_for_rsp(&cptpf->afpf_mbox, 0);
if (ret == -EIO) {
dev_err(&cptpf->pdev->dev, "RVU MBOX timeout.\n");
return ret;
} else if (ret) {
dev_err(&cptpf->pdev->dev, "RVU MBOX error: %d.\n", ret);
return -EFAULT;
}
return 0;
}
static int cptpf_handle_vf_req(struct otx2_cptpf_dev *cptpf,
struct otx2_cptvf_info *vf,
struct mbox_msghdr *req, int size)
{
int err = 0;
/* Check if msg is valid, if not reply with an invalid msg */
if (req->sig != OTX2_MBOX_REQ_SIG)
goto inval_msg;
return forward_to_af(cptpf, vf, req, size);
inval_msg:
otx2_reply_invalid_msg(&cptpf->vfpf_mbox, vf->vf_id, 0, req->id);
otx2_mbox_msg_send(&cptpf->vfpf_mbox, vf->vf_id);
return err;
}
irqreturn_t otx2_cptpf_vfpf_mbox_intr(int __always_unused irq, void *arg)
{
struct otx2_cptpf_dev *cptpf = arg;
struct otx2_cptvf_info *vf;
int i, vf_idx;
u64 intr;
/*
* Check which VF has raised an interrupt and schedule
* corresponding work queue to process the messages
*/
for (i = 0; i < 2; i++) {
/* Read the interrupt bits */
intr = otx2_cpt_read64(cptpf->reg_base, BLKADDR_RVUM, 0,
RVU_PF_VFPF_MBOX_INTX(i));
for (vf_idx = i * 64; vf_idx < cptpf->enabled_vfs; vf_idx++) {
vf = &cptpf->vf[vf_idx];
if (intr & (1ULL << vf->intr_idx)) {
queue_work(cptpf->vfpf_mbox_wq,
&vf->vfpf_mbox_work);
/* Clear the interrupt */
otx2_cpt_write64(cptpf->reg_base, BLKADDR_RVUM,
0, RVU_PF_VFPF_MBOX_INTX(i),
BIT_ULL(vf->intr_idx));
}
}
}
return IRQ_HANDLED;
}
void otx2_cptpf_vfpf_mbox_handler(struct work_struct *work)
{
struct otx2_cptpf_dev *cptpf;
struct otx2_cptvf_info *vf;
struct otx2_mbox_dev *mdev;
struct mbox_hdr *req_hdr;
struct mbox_msghdr *msg;
struct otx2_mbox *mbox;
int offset, i, err;
vf = container_of(work, struct otx2_cptvf_info, vfpf_mbox_work);
cptpf = vf->cptpf;
mbox = &cptpf->vfpf_mbox;
/* sync with mbox memory region */
smp_rmb();
mdev = &mbox->dev[vf->vf_id];
/* Process received mbox messages */
req_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
offset = mbox->rx_start + ALIGN(sizeof(*req_hdr), MBOX_MSG_ALIGN);
for (i = 0; i < req_hdr->num_msgs; i++) {
msg = (struct mbox_msghdr *)(mdev->mbase + offset);
/* Set which VF sent this message based on mbox IRQ */
msg->pcifunc = ((u16)cptpf->pf_id << RVU_PFVF_PF_SHIFT) |
((vf->vf_id + 1) & RVU_PFVF_FUNC_MASK);
err = cptpf_handle_vf_req(cptpf, vf, msg,
msg->next_msgoff - offset);
/*
* Behave as the AF, drop the msg if there is
* no memory, timeout handling also goes here
*/
if (err == -ENOMEM || err == -EIO)
break;
offset = msg->next_msgoff;
}
/* Send mbox responses to VF */
if (mdev->num_msgs)
otx2_mbox_msg_send(mbox, vf->vf_id);
}
irqreturn_t otx2_cptpf_afpf_mbox_intr(int __always_unused irq, void *arg)
{
struct otx2_cptpf_dev *cptpf = arg;
u64 intr;
/* Read the interrupt bits */
intr = otx2_cpt_read64(cptpf->reg_base, BLKADDR_RVUM, 0, RVU_PF_INT);
if (intr & 0x1ULL) {
/* Schedule work queue function to process the MBOX request */
queue_work(cptpf->afpf_mbox_wq, &cptpf->afpf_mbox_work);
/* Clear and ack the interrupt */
otx2_cpt_write64(cptpf->reg_base, BLKADDR_RVUM, 0, RVU_PF_INT,
0x1ULL);
}
return IRQ_HANDLED;
}
static void process_afpf_mbox_msg(struct otx2_cptpf_dev *cptpf,
struct mbox_msghdr *msg)
{
struct device *dev = &cptpf->pdev->dev;
if (msg->id >= MBOX_MSG_MAX) {
dev_err(dev, "MBOX msg with unknown ID %d\n", msg->id);
return;
}
if (msg->sig != OTX2_MBOX_RSP_SIG) {
dev_err(dev, "MBOX msg with wrong signature %x, ID %d\n",
msg->sig, msg->id);
return;
}
switch (msg->id) {
case MBOX_MSG_READY:
cptpf->pf_id = (msg->pcifunc >> RVU_PFVF_PF_SHIFT) &
RVU_PFVF_PF_MASK;
break;
default:
dev_err(dev,
"Unsupported msg %d received.\n", msg->id);
break;
}
}
static void forward_to_vf(struct otx2_cptpf_dev *cptpf, struct mbox_msghdr *msg,
int vf_id, int size)
{
struct otx2_mbox *vfpf_mbox;
struct mbox_msghdr *fwd;
if (msg->id >= MBOX_MSG_MAX) {
dev_err(&cptpf->pdev->dev,
"MBOX msg with unknown ID %d\n", msg->id);
return;
}
if (msg->sig != OTX2_MBOX_RSP_SIG) {
dev_err(&cptpf->pdev->dev,
"MBOX msg with wrong signature %x, ID %d\n",
msg->sig, msg->id);
return;
}
vfpf_mbox = &cptpf->vfpf_mbox;
vf_id--;
if (vf_id >= cptpf->enabled_vfs) {
dev_err(&cptpf->pdev->dev,
"MBOX msg to unknown VF: %d >= %d\n",
vf_id, cptpf->enabled_vfs);
return;
}
if (msg->id == MBOX_MSG_VF_FLR)
return;
fwd = otx2_mbox_alloc_msg(vfpf_mbox, vf_id, size);
if (!fwd) {
dev_err(&cptpf->pdev->dev,
"Forwarding to VF%d failed.\n", vf_id);
return;
}
memcpy((uint8_t *)fwd + sizeof(struct mbox_msghdr),
(uint8_t *)msg + sizeof(struct mbox_msghdr), size);
fwd->id = msg->id;
fwd->pcifunc = msg->pcifunc;
fwd->sig = msg->sig;
fwd->ver = msg->ver;
fwd->rc = msg->rc;
}
/* Handle mailbox messages received from AF */
void otx2_cptpf_afpf_mbox_handler(struct work_struct *work)
{
struct otx2_cptpf_dev *cptpf;
struct otx2_mbox *afpf_mbox;
struct otx2_mbox_dev *mdev;
struct mbox_hdr *rsp_hdr;
struct mbox_msghdr *msg;
int offset, vf_id, i;
cptpf = container_of(work, struct otx2_cptpf_dev, afpf_mbox_work);
afpf_mbox = &cptpf->afpf_mbox;
mdev = &afpf_mbox->dev[0];
/* Sync mbox data into memory */
smp_wmb();
rsp_hdr = (struct mbox_hdr *)(mdev->mbase + afpf_mbox->rx_start);
offset = ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
for (i = 0; i < rsp_hdr->num_msgs; i++) {
msg = (struct mbox_msghdr *)(mdev->mbase + afpf_mbox->rx_start +
offset);
vf_id = (msg->pcifunc >> RVU_PFVF_FUNC_SHIFT) &
RVU_PFVF_FUNC_MASK;
if (vf_id > 0)
forward_to_vf(cptpf, msg, vf_id,
msg->next_msgoff - offset);
else
process_afpf_mbox_msg(cptpf, msg);
offset = msg->next_msgoff;
mdev->msgs_acked++;
}
otx2_mbox_reset(afpf_mbox, 0);
}
|
