diff options
Diffstat (limited to 'drivers/net/ethernet/intel/fm10k/fm10k_debugfs.c')
| -rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k_debugfs.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_debugfs.c b/drivers/net/ethernet/intel/fm10k/fm10k_debugfs.c new file mode 100644 index 000000000..1d27b2fb2 --- /dev/null +++ b/drivers/net/ethernet/intel/fm10k/fm10k_debugfs.c @@ -0,0 +1,239 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2013 - 2018 Intel Corporation. */ + +#include "fm10k.h" + +#include <linux/debugfs.h> +#include <linux/seq_file.h> + +static struct dentry *dbg_root; + +/* Descriptor Seq Functions */ + +static void *fm10k_dbg_desc_seq_start(struct seq_file *s, loff_t *pos) +{ + struct fm10k_ring *ring = s->private; + + return (*pos < ring->count) ? pos : NULL; +} + +static void *fm10k_dbg_desc_seq_next(struct seq_file *s, + void __always_unused *v, + loff_t *pos) +{ + struct fm10k_ring *ring = s->private; + + return (++(*pos) < ring->count) ? pos : NULL; +} + +static void fm10k_dbg_desc_seq_stop(struct seq_file __always_unused *s, + void __always_unused *v) +{ + /* Do nothing. */ +} + +static void fm10k_dbg_desc_break(struct seq_file *s, int i) +{ + while (i--) + seq_putc(s, '-'); + + seq_putc(s, '\n'); +} + +static int fm10k_dbg_tx_desc_seq_show(struct seq_file *s, void *v) +{ + struct fm10k_ring *ring = s->private; + int i = *(loff_t *)v; + static const char tx_desc_hdr[] = + "DES BUFFER_ADDRESS LENGTH VLAN MSS HDRLEN FLAGS\n"; + + /* Generate header */ + if (!i) { + seq_printf(s, tx_desc_hdr); + fm10k_dbg_desc_break(s, sizeof(tx_desc_hdr) - 1); + } + + /* Validate descriptor allocation */ + if (!ring->desc) { + seq_printf(s, "%03X Descriptor ring not allocated.\n", i); + } else { + struct fm10k_tx_desc *txd = FM10K_TX_DESC(ring, i); + + seq_printf(s, "%03X %#018llx %#06x %#06x %#06x %#06x %#04x\n", + i, txd->buffer_addr, txd->buflen, txd->vlan, + txd->mss, txd->hdrlen, txd->flags); + } + + return 0; +} + +static int fm10k_dbg_rx_desc_seq_show(struct seq_file *s, void *v) +{ + struct fm10k_ring *ring = s->private; + int i = *(loff_t *)v; + static const char rx_desc_hdr[] = + "DES DATA RSS STATERR LENGTH VLAN DGLORT SGLORT TIMESTAMP\n"; + + /* Generate header */ + if (!i) { + seq_printf(s, rx_desc_hdr); + fm10k_dbg_desc_break(s, sizeof(rx_desc_hdr) - 1); + } + + /* Validate descriptor allocation */ + if (!ring->desc) { + seq_printf(s, "%03X Descriptor ring not allocated.\n", i); + } else { + union fm10k_rx_desc *rxd = FM10K_RX_DESC(ring, i); + + seq_printf(s, + "%03X %#010x %#010x %#010x %#06x %#06x %#06x %#06x %#018llx\n", + i, rxd->d.data, rxd->d.rss, rxd->d.staterr, + rxd->w.length, rxd->w.vlan, rxd->w.dglort, + rxd->w.sglort, rxd->q.timestamp); + } + + return 0; +} + +static const struct seq_operations fm10k_dbg_tx_desc_seq_ops = { + .start = fm10k_dbg_desc_seq_start, + .next = fm10k_dbg_desc_seq_next, + .stop = fm10k_dbg_desc_seq_stop, + .show = fm10k_dbg_tx_desc_seq_show, +}; + +static const struct seq_operations fm10k_dbg_rx_desc_seq_ops = { + .start = fm10k_dbg_desc_seq_start, + .next = fm10k_dbg_desc_seq_next, + .stop = fm10k_dbg_desc_seq_stop, + .show = fm10k_dbg_rx_desc_seq_show, +}; + +static int fm10k_dbg_desc_open(struct inode *inode, struct file *filep) +{ + struct fm10k_ring *ring = inode->i_private; + struct fm10k_q_vector *q_vector = ring->q_vector; + const struct seq_operations *desc_seq_ops; + int err; + + if (ring < q_vector->rx.ring) + desc_seq_ops = &fm10k_dbg_tx_desc_seq_ops; + else + desc_seq_ops = &fm10k_dbg_rx_desc_seq_ops; + + err = seq_open(filep, desc_seq_ops); + if (err) + return err; + + ((struct seq_file *)filep->private_data)->private = ring; + + return 0; +} + +static const struct file_operations fm10k_dbg_desc_fops = { + .owner = THIS_MODULE, + .open = fm10k_dbg_desc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +/** + * fm10k_dbg_q_vector_init - setup debugfs for the q_vectors + * @q_vector: q_vector to allocate directories for + * + * A folder is created for each q_vector found. In each q_vector + * folder, a debugfs file is created for each tx and rx ring + * allocated to the q_vector. + **/ +void fm10k_dbg_q_vector_init(struct fm10k_q_vector *q_vector) +{ + struct fm10k_intfc *interface = q_vector->interface; + char name[16]; + int i; + + if (!interface->dbg_intfc) + return; + + /* Generate a folder for each q_vector */ + snprintf(name, sizeof(name), "q_vector.%03d", q_vector->v_idx); + + q_vector->dbg_q_vector = debugfs_create_dir(name, interface->dbg_intfc); + + /* Generate a file for each rx ring in the q_vector */ + for (i = 0; i < q_vector->tx.count; i++) { + struct fm10k_ring *ring = &q_vector->tx.ring[i]; + + snprintf(name, sizeof(name), "tx_ring.%03d", ring->queue_index); + + debugfs_create_file(name, 0600, + q_vector->dbg_q_vector, ring, + &fm10k_dbg_desc_fops); + } + + /* Generate a file for each rx ring in the q_vector */ + for (i = 0; i < q_vector->rx.count; i++) { + struct fm10k_ring *ring = &q_vector->rx.ring[i]; + + snprintf(name, sizeof(name), "rx_ring.%03d", ring->queue_index); + + debugfs_create_file(name, 0600, + q_vector->dbg_q_vector, ring, + &fm10k_dbg_desc_fops); + } +} + +/** + * fm10k_dbg_free_q_vector_dir - setup debugfs for the q_vectors + * @q_vector: q_vector to allocate directories for + **/ +void fm10k_dbg_q_vector_exit(struct fm10k_q_vector *q_vector) +{ + struct fm10k_intfc *interface = q_vector->interface; + + if (interface->dbg_intfc) + debugfs_remove_recursive(q_vector->dbg_q_vector); + q_vector->dbg_q_vector = NULL; +} + +/** + * fm10k_dbg_intfc_init - setup the debugfs directory for the intferface + * @interface: the interface that is starting up + **/ + +void fm10k_dbg_intfc_init(struct fm10k_intfc *interface) +{ + const char *name = pci_name(interface->pdev); + + if (dbg_root) + interface->dbg_intfc = debugfs_create_dir(name, dbg_root); +} + +/** + * fm10k_dbg_intfc_exit - clean out the interface's debugfs entries + * @interface: the interface that is stopping + **/ +void fm10k_dbg_intfc_exit(struct fm10k_intfc *interface) +{ + if (dbg_root) + debugfs_remove_recursive(interface->dbg_intfc); + interface->dbg_intfc = NULL; +} + +/** + * fm10k_dbg_init - start up debugfs for the driver + **/ +void fm10k_dbg_init(void) +{ + dbg_root = debugfs_create_dir(fm10k_driver_name, NULL); +} + +/** + * fm10k_dbg_exit - clean out the driver's debugfs entries + **/ +void fm10k_dbg_exit(void) +{ + debugfs_remove_recursive(dbg_root); + dbg_root = NULL; +} |