gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / ethernet / intel / fm10k / fm10k_debugfs.c
blob1d27b2fb23af8f7c6b164ec461165dcd7c099890
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
4 #include "fm10k.h"
6 #include <linux/debugfs.h>
7 #include <linux/seq_file.h>
9 static struct dentry *dbg_root;
11 /* Descriptor Seq Functions */
13 static void *fm10k_dbg_desc_seq_start(struct seq_file *s, loff_t *pos)
15 struct fm10k_ring *ring = s->private;
17 return (*pos < ring->count) ? pos : NULL;
20 static void *fm10k_dbg_desc_seq_next(struct seq_file *s,
21 void __always_unused *v,
22 loff_t *pos)
24 struct fm10k_ring *ring = s->private;
26 return (++(*pos) < ring->count) ? pos : NULL;
29 static void fm10k_dbg_desc_seq_stop(struct seq_file __always_unused *s,
30 void __always_unused *v)
32 /* Do nothing. */
35 static void fm10k_dbg_desc_break(struct seq_file *s, int i)
37 while (i--)
38 seq_putc(s, '-');
40 seq_putc(s, '\n');
43 static int fm10k_dbg_tx_desc_seq_show(struct seq_file *s, void *v)
45 struct fm10k_ring *ring = s->private;
46 int i = *(loff_t *)v;
47 static const char tx_desc_hdr[] =
48 "DES BUFFER_ADDRESS LENGTH VLAN MSS HDRLEN FLAGS\n";
50 /* Generate header */
51 if (!i) {
52 seq_printf(s, tx_desc_hdr);
53 fm10k_dbg_desc_break(s, sizeof(tx_desc_hdr) - 1);
56 /* Validate descriptor allocation */
57 if (!ring->desc) {
58 seq_printf(s, "%03X Descriptor ring not allocated.\n", i);
59 } else {
60 struct fm10k_tx_desc *txd = FM10K_TX_DESC(ring, i);
62 seq_printf(s, "%03X %#018llx %#06x %#06x %#06x %#06x %#04x\n",
63 i, txd->buffer_addr, txd->buflen, txd->vlan,
64 txd->mss, txd->hdrlen, txd->flags);
67 return 0;
70 static int fm10k_dbg_rx_desc_seq_show(struct seq_file *s, void *v)
72 struct fm10k_ring *ring = s->private;
73 int i = *(loff_t *)v;
74 static const char rx_desc_hdr[] =
75 "DES DATA RSS STATERR LENGTH VLAN DGLORT SGLORT TIMESTAMP\n";
77 /* Generate header */
78 if (!i) {
79 seq_printf(s, rx_desc_hdr);
80 fm10k_dbg_desc_break(s, sizeof(rx_desc_hdr) - 1);
83 /* Validate descriptor allocation */
84 if (!ring->desc) {
85 seq_printf(s, "%03X Descriptor ring not allocated.\n", i);
86 } else {
87 union fm10k_rx_desc *rxd = FM10K_RX_DESC(ring, i);
89 seq_printf(s,
90 "%03X %#010x %#010x %#010x %#06x %#06x %#06x %#06x %#018llx\n",
91 i, rxd->d.data, rxd->d.rss, rxd->d.staterr,
92 rxd->w.length, rxd->w.vlan, rxd->w.dglort,
93 rxd->w.sglort, rxd->q.timestamp);
96 return 0;
99 static const struct seq_operations fm10k_dbg_tx_desc_seq_ops = {
100 .start = fm10k_dbg_desc_seq_start,
101 .next = fm10k_dbg_desc_seq_next,
102 .stop = fm10k_dbg_desc_seq_stop,
103 .show = fm10k_dbg_tx_desc_seq_show,
106 static const struct seq_operations fm10k_dbg_rx_desc_seq_ops = {
107 .start = fm10k_dbg_desc_seq_start,
108 .next = fm10k_dbg_desc_seq_next,
109 .stop = fm10k_dbg_desc_seq_stop,
110 .show = fm10k_dbg_rx_desc_seq_show,
113 static int fm10k_dbg_desc_open(struct inode *inode, struct file *filep)
115 struct fm10k_ring *ring = inode->i_private;
116 struct fm10k_q_vector *q_vector = ring->q_vector;
117 const struct seq_operations *desc_seq_ops;
118 int err;
120 if (ring < q_vector->rx.ring)
121 desc_seq_ops = &fm10k_dbg_tx_desc_seq_ops;
122 else
123 desc_seq_ops = &fm10k_dbg_rx_desc_seq_ops;
125 err = seq_open(filep, desc_seq_ops);
126 if (err)
127 return err;
129 ((struct seq_file *)filep->private_data)->private = ring;
131 return 0;
134 static const struct file_operations fm10k_dbg_desc_fops = {
135 .owner = THIS_MODULE,
136 .open = fm10k_dbg_desc_open,
137 .read = seq_read,
138 .llseek = seq_lseek,
139 .release = seq_release,
143 * fm10k_dbg_q_vector_init - setup debugfs for the q_vectors
144 * @q_vector: q_vector to allocate directories for
146 * A folder is created for each q_vector found. In each q_vector
147 * folder, a debugfs file is created for each tx and rx ring
148 * allocated to the q_vector.
150 void fm10k_dbg_q_vector_init(struct fm10k_q_vector *q_vector)
152 struct fm10k_intfc *interface = q_vector->interface;
153 char name[16];
154 int i;
156 if (!interface->dbg_intfc)
157 return;
159 /* Generate a folder for each q_vector */
160 snprintf(name, sizeof(name), "q_vector.%03d", q_vector->v_idx);
162 q_vector->dbg_q_vector = debugfs_create_dir(name, interface->dbg_intfc);
164 /* Generate a file for each rx ring in the q_vector */
165 for (i = 0; i < q_vector->tx.count; i++) {
166 struct fm10k_ring *ring = &q_vector->tx.ring[i];
168 snprintf(name, sizeof(name), "tx_ring.%03d", ring->queue_index);
170 debugfs_create_file(name, 0600,
171 q_vector->dbg_q_vector, ring,
172 &fm10k_dbg_desc_fops);
175 /* Generate a file for each rx ring in the q_vector */
176 for (i = 0; i < q_vector->rx.count; i++) {
177 struct fm10k_ring *ring = &q_vector->rx.ring[i];
179 snprintf(name, sizeof(name), "rx_ring.%03d", ring->queue_index);
181 debugfs_create_file(name, 0600,
182 q_vector->dbg_q_vector, ring,
183 &fm10k_dbg_desc_fops);
188 * fm10k_dbg_free_q_vector_dir - setup debugfs for the q_vectors
189 * @q_vector: q_vector to allocate directories for
191 void fm10k_dbg_q_vector_exit(struct fm10k_q_vector *q_vector)
193 struct fm10k_intfc *interface = q_vector->interface;
195 if (interface->dbg_intfc)
196 debugfs_remove_recursive(q_vector->dbg_q_vector);
197 q_vector->dbg_q_vector = NULL;
201 * fm10k_dbg_intfc_init - setup the debugfs directory for the intferface
202 * @interface: the interface that is starting up
205 void fm10k_dbg_intfc_init(struct fm10k_intfc *interface)
207 const char *name = pci_name(interface->pdev);
209 if (dbg_root)
210 interface->dbg_intfc = debugfs_create_dir(name, dbg_root);
214 * fm10k_dbg_intfc_exit - clean out the interface's debugfs entries
215 * @interface: the interface that is stopping
217 void fm10k_dbg_intfc_exit(struct fm10k_intfc *interface)
219 if (dbg_root)
220 debugfs_remove_recursive(interface->dbg_intfc);
221 interface->dbg_intfc = NULL;
225 * fm10k_dbg_init - start up debugfs for the driver
227 void fm10k_dbg_init(void)
229 dbg_root = debugfs_create_dir(fm10k_driver_name, NULL);
233 * fm10k_dbg_exit - clean out the driver's debugfs entries
235 void fm10k_dbg_exit(void)
237 debugfs_remove_recursive(dbg_root);
238 dbg_root = NULL;