1 /*
2 * Intel MIC Platform Software Stack (MPSS)
3 *
4 * Copyright(c) 2016 Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2, as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * The full GNU General Public License is included in this distribution in
16 * the file called "COPYING".
17 *
18 * Intel Virtio Over PCIe (VOP) driver.
19 *
20 */
21 #include <linux/debugfs.h>
22 #include <linux/seq_file.h>
23
24 #include "vop_main.h"
25
vop_dp_show(struct seq_file * s,void * pos)26 static int vop_dp_show(struct seq_file *s, void *pos)
27 {
28 struct mic_device_desc *d;
29 struct mic_device_ctrl *dc;
30 struct mic_vqconfig *vqconfig;
31 __u32 *features;
32 __u8 *config;
33 struct vop_info *vi = s->private;
34 struct vop_device *vpdev = vi->vpdev;
35 struct mic_bootparam *bootparam = vpdev->hw_ops->get_dp(vpdev);
36 int j, k;
37
38 seq_printf(s, "Bootparam: magic 0x%x\n",
39 bootparam->magic);
40 seq_printf(s, "Bootparam: h2c_config_db %d\n",
41 bootparam->h2c_config_db);
42 seq_printf(s, "Bootparam: node_id %d\n",
43 bootparam->node_id);
44 seq_printf(s, "Bootparam: c2h_scif_db %d\n",
45 bootparam->c2h_scif_db);
46 seq_printf(s, "Bootparam: h2c_scif_db %d\n",
47 bootparam->h2c_scif_db);
48 seq_printf(s, "Bootparam: scif_host_dma_addr 0x%llx\n",
49 bootparam->scif_host_dma_addr);
50 seq_printf(s, "Bootparam: scif_card_dma_addr 0x%llx\n",
51 bootparam->scif_card_dma_addr);
52
53 for (j = sizeof(*bootparam);
54 j < MIC_DP_SIZE; j += mic_total_desc_size(d)) {
55 d = (void *)bootparam + j;
56 dc = (void *)d + mic_aligned_desc_size(d);
57
58 /* end of list */
59 if (d->type == 0)
60 break;
61
62 if (d->type == -1)
63 continue;
64
65 seq_printf(s, "Type %d ", d->type);
66 seq_printf(s, "Num VQ %d ", d->num_vq);
67 seq_printf(s, "Feature Len %d\n", d->feature_len);
68 seq_printf(s, "Config Len %d ", d->config_len);
69 seq_printf(s, "Shutdown Status %d\n", d->status);
70
71 for (k = 0; k < d->num_vq; k++) {
72 vqconfig = mic_vq_config(d) + k;
73 seq_printf(s, "vqconfig[%d]: ", k);
74 seq_printf(s, "address 0x%llx ",
75 vqconfig->address);
76 seq_printf(s, "num %d ", vqconfig->num);
77 seq_printf(s, "used address 0x%llx\n",
78 vqconfig->used_address);
79 }
80
81 features = (__u32 *)mic_vq_features(d);
82 seq_printf(s, "Features: Host 0x%x ", features[0]);
83 seq_printf(s, "Guest 0x%x\n", features[1]);
84
85 config = mic_vq_configspace(d);
86 for (k = 0; k < d->config_len; k++)
87 seq_printf(s, "config[%d]=%d\n", k, config[k]);
88
89 seq_puts(s, "Device control:\n");
90 seq_printf(s, "Config Change %d ", dc->config_change);
91 seq_printf(s, "Vdev reset %d\n", dc->vdev_reset);
92 seq_printf(s, "Guest Ack %d ", dc->guest_ack);
93 seq_printf(s, "Host ack %d\n", dc->host_ack);
94 seq_printf(s, "Used address updated %d ",
95 dc->used_address_updated);
96 seq_printf(s, "Vdev 0x%llx\n", dc->vdev);
97 seq_printf(s, "c2h doorbell %d ", dc->c2h_vdev_db);
98 seq_printf(s, "h2c doorbell %d\n", dc->h2c_vdev_db);
99 }
100 schedule_work(&vi->hotplug_work);
101 return 0;
102 }
103
vop_dp_debug_open(struct inode * inode,struct file * file)104 static int vop_dp_debug_open(struct inode *inode, struct file *file)
105 {
106 return single_open(file, vop_dp_show, inode->i_private);
107 }
108
vop_dp_debug_release(struct inode * inode,struct file * file)109 static int vop_dp_debug_release(struct inode *inode, struct file *file)
110 {
111 return single_release(inode, file);
112 }
113
114 static const struct file_operations dp_ops = {
115 .owner = THIS_MODULE,
116 .open = vop_dp_debug_open,
117 .read = seq_read,
118 .llseek = seq_lseek,
119 .release = vop_dp_debug_release
120 };
121
vop_vdev_info_show(struct seq_file * s,void * unused)122 static int vop_vdev_info_show(struct seq_file *s, void *unused)
123 {
124 struct vop_info *vi = s->private;
125 struct list_head *pos, *tmp;
126 struct vop_vdev *vdev;
127 int i, j;
128
129 mutex_lock(&vi->vop_mutex);
130 list_for_each_safe(pos, tmp, &vi->vdev_list) {
131 vdev = list_entry(pos, struct vop_vdev, list);
132 seq_printf(s, "VDEV type %d state %s in %ld out %ld in_dma %ld out_dma %ld\n",
133 vdev->virtio_id,
134 vop_vdevup(vdev) ? "UP" : "DOWN",
135 vdev->in_bytes,
136 vdev->out_bytes,
137 vdev->in_bytes_dma,
138 vdev->out_bytes_dma);
139 for (i = 0; i < MIC_MAX_VRINGS; i++) {
140 struct vring_desc *desc;
141 struct vring_avail *avail;
142 struct vring_used *used;
143 struct vop_vringh *vvr = &vdev->vvr[i];
144 struct vringh *vrh = &vvr->vrh;
145 int num = vrh->vring.num;
146
147 if (!num)
148 continue;
149 desc = vrh->vring.desc;
150 seq_printf(s, "vring i %d avail_idx %d",
151 i, vvr->vring.info->avail_idx & (num - 1));
152 seq_printf(s, " vring i %d avail_idx %d\n",
153 i, vvr->vring.info->avail_idx);
154 seq_printf(s, "vrh i %d weak_barriers %d",
155 i, vrh->weak_barriers);
156 seq_printf(s, " last_avail_idx %d last_used_idx %d",
157 vrh->last_avail_idx, vrh->last_used_idx);
158 seq_printf(s, " completed %d\n", vrh->completed);
159 for (j = 0; j < num; j++) {
160 seq_printf(s, "desc[%d] addr 0x%llx len %d",
161 j, desc->addr, desc->len);
162 seq_printf(s, " flags 0x%x next %d\n",
163 desc->flags, desc->next);
164 desc++;
165 }
166 avail = vrh->vring.avail;
167 seq_printf(s, "avail flags 0x%x idx %d\n",
168 vringh16_to_cpu(vrh, avail->flags),
169 vringh16_to_cpu(vrh,
170 avail->idx) & (num - 1));
171 seq_printf(s, "avail flags 0x%x idx %d\n",
172 vringh16_to_cpu(vrh, avail->flags),
173 vringh16_to_cpu(vrh, avail->idx));
174 for (j = 0; j < num; j++)
175 seq_printf(s, "avail ring[%d] %d\n",
176 j, avail->ring[j]);
177 used = vrh->vring.used;
178 seq_printf(s, "used flags 0x%x idx %d\n",
179 vringh16_to_cpu(vrh, used->flags),
180 vringh16_to_cpu(vrh, used->idx) & (num - 1));
181 seq_printf(s, "used flags 0x%x idx %d\n",
182 vringh16_to_cpu(vrh, used->flags),
183 vringh16_to_cpu(vrh, used->idx));
184 for (j = 0; j < num; j++)
185 seq_printf(s, "used ring[%d] id %d len %d\n",
186 j, vringh32_to_cpu(vrh,
187 used->ring[j].id),
188 vringh32_to_cpu(vrh,
189 used->ring[j].len));
190 }
191 }
192 mutex_unlock(&vi->vop_mutex);
193
194 return 0;
195 }
196
vop_vdev_info_debug_open(struct inode * inode,struct file * file)197 static int vop_vdev_info_debug_open(struct inode *inode, struct file *file)
198 {
199 return single_open(file, vop_vdev_info_show, inode->i_private);
200 }
201
vop_vdev_info_debug_release(struct inode * inode,struct file * file)202 static int vop_vdev_info_debug_release(struct inode *inode, struct file *file)
203 {
204 return single_release(inode, file);
205 }
206
207 static const struct file_operations vdev_info_ops = {
208 .owner = THIS_MODULE,
209 .open = vop_vdev_info_debug_open,
210 .read = seq_read,
211 .llseek = seq_lseek,
212 .release = vop_vdev_info_debug_release
213 };
214
vop_init_debugfs(struct vop_info * vi)215 void vop_init_debugfs(struct vop_info *vi)
216 {
217 char name[16];
218
219 snprintf(name, sizeof(name), "%s%d", KBUILD_MODNAME, vi->vpdev->dnode);
220 vi->dbg = debugfs_create_dir(name, NULL);
221 if (!vi->dbg) {
222 pr_err("can't create debugfs dir vop\n");
223 return;
224 }
225 debugfs_create_file("dp", 0444, vi->dbg, vi, &dp_ops);
226 debugfs_create_file("vdev_info", 0444, vi->dbg, vi, &vdev_info_ops);
227 }
228
vop_exit_debugfs(struct vop_info * vi)229 void vop_exit_debugfs(struct vop_info *vi)
230 {
231 debugfs_remove_recursive(vi->dbg);
232 }
233
