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210 lines
4.7 KiB
210 lines
4.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright IBM Corp. 2012,2015 |
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* |
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* Author(s): |
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* Jan Glauber <[email protected]> |
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*/ |
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#define KMSG_COMPONENT "zpci" |
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
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#include <linux/kernel.h> |
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#include <linux/seq_file.h> |
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#include <linux/debugfs.h> |
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#include <linux/export.h> |
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#include <linux/pci.h> |
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#include <asm/debug.h> |
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#include <asm/pci_dma.h> |
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static struct dentry *debugfs_root; |
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debug_info_t *pci_debug_msg_id; |
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EXPORT_SYMBOL_GPL(pci_debug_msg_id); |
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debug_info_t *pci_debug_err_id; |
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EXPORT_SYMBOL_GPL(pci_debug_err_id); |
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static char *pci_common_names[] = { |
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"Load operations", |
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"Store operations", |
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"Store block operations", |
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"Refresh operations", |
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}; |
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static char *pci_fmt0_names[] = { |
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"DMA read bytes", |
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"DMA write bytes", |
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}; |
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static char *pci_fmt1_names[] = { |
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"Received bytes", |
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"Received packets", |
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"Transmitted bytes", |
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"Transmitted packets", |
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}; |
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static char *pci_fmt2_names[] = { |
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"Consumed work units", |
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"Maximum work units", |
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}; |
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static char *pci_fmt3_names[] = { |
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"Transmitted bytes", |
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}; |
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static char *pci_sw_names[] = { |
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"Allocated pages", |
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"Mapped pages", |
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"Unmapped pages", |
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}; |
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static void pci_fmb_show(struct seq_file *m, char *name[], int length, |
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u64 *data) |
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{ |
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int i; |
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for (i = 0; i < length; i++, data++) |
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seq_printf(m, "%26s:\t%llu\n", name[i], *data); |
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} |
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static void pci_sw_counter_show(struct seq_file *m) |
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{ |
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struct zpci_dev *zdev = m->private; |
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atomic64_t *counter = &zdev->allocated_pages; |
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int i; |
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for (i = 0; i < ARRAY_SIZE(pci_sw_names); i++, counter++) |
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seq_printf(m, "%26s:\t%llu\n", pci_sw_names[i], |
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atomic64_read(counter)); |
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} |
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static int pci_perf_show(struct seq_file *m, void *v) |
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{ |
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struct zpci_dev *zdev = m->private; |
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if (!zdev) |
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return 0; |
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mutex_lock(&zdev->lock); |
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if (!zdev->fmb) { |
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mutex_unlock(&zdev->lock); |
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seq_puts(m, "FMB statistics disabled\n"); |
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return 0; |
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} |
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/* header */ |
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seq_printf(m, "Update interval: %u ms\n", zdev->fmb_update); |
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seq_printf(m, "Samples: %u\n", zdev->fmb->samples); |
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seq_printf(m, "Last update TOD: %Lx\n", zdev->fmb->last_update); |
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pci_fmb_show(m, pci_common_names, ARRAY_SIZE(pci_common_names), |
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&zdev->fmb->ld_ops); |
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switch (zdev->fmb->format) { |
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case 0: |
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if (!(zdev->fmb->fmt_ind & ZPCI_FMB_DMA_COUNTER_VALID)) |
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break; |
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pci_fmb_show(m, pci_fmt0_names, ARRAY_SIZE(pci_fmt0_names), |
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&zdev->fmb->fmt0.dma_rbytes); |
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break; |
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case 1: |
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pci_fmb_show(m, pci_fmt1_names, ARRAY_SIZE(pci_fmt1_names), |
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&zdev->fmb->fmt1.rx_bytes); |
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break; |
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case 2: |
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pci_fmb_show(m, pci_fmt2_names, ARRAY_SIZE(pci_fmt2_names), |
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&zdev->fmb->fmt2.consumed_work_units); |
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break; |
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case 3: |
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pci_fmb_show(m, pci_fmt3_names, ARRAY_SIZE(pci_fmt3_names), |
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&zdev->fmb->fmt3.tx_bytes); |
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break; |
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default: |
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seq_puts(m, "Unknown format\n"); |
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} |
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pci_sw_counter_show(m); |
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mutex_unlock(&zdev->lock); |
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return 0; |
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} |
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static ssize_t pci_perf_seq_write(struct file *file, const char __user *ubuf, |
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size_t count, loff_t *off) |
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{ |
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struct zpci_dev *zdev = ((struct seq_file *) file->private_data)->private; |
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unsigned long val; |
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int rc; |
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if (!zdev) |
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return 0; |
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rc = kstrtoul_from_user(ubuf, count, 10, &val); |
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if (rc) |
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return rc; |
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mutex_lock(&zdev->lock); |
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switch (val) { |
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case 0: |
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rc = zpci_fmb_disable_device(zdev); |
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break; |
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case 1: |
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rc = zpci_fmb_enable_device(zdev); |
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break; |
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} |
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mutex_unlock(&zdev->lock); |
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return rc ? rc : count; |
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} |
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static int pci_perf_seq_open(struct inode *inode, struct file *filp) |
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{ |
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return single_open(filp, pci_perf_show, |
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file_inode(filp)->i_private); |
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} |
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static const struct file_operations debugfs_pci_perf_fops = { |
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.open = pci_perf_seq_open, |
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.read = seq_read, |
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.write = pci_perf_seq_write, |
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.llseek = seq_lseek, |
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.release = single_release, |
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}; |
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void zpci_debug_init_device(struct zpci_dev *zdev, const char *name) |
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{ |
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zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root); |
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debugfs_create_file("statistics", S_IFREG | S_IRUGO | S_IWUSR, |
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zdev->debugfs_dev, zdev, &debugfs_pci_perf_fops); |
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} |
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void zpci_debug_exit_device(struct zpci_dev *zdev) |
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{ |
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debugfs_remove_recursive(zdev->debugfs_dev); |
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} |
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int __init zpci_debug_init(void) |
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{ |
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/* event trace buffer */ |
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pci_debug_msg_id = debug_register("pci_msg", 8, 1, 8 * sizeof(long)); |
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if (!pci_debug_msg_id) |
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return -EINVAL; |
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debug_register_view(pci_debug_msg_id, &debug_sprintf_view); |
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debug_set_level(pci_debug_msg_id, 3); |
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/* error log */ |
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pci_debug_err_id = debug_register("pci_error", 2, 1, 16); |
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if (!pci_debug_err_id) |
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return -EINVAL; |
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debug_register_view(pci_debug_err_id, &debug_hex_ascii_view); |
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debug_set_level(pci_debug_err_id, 6); |
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debugfs_root = debugfs_create_dir("pci", NULL); |
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return 0; |
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} |
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void zpci_debug_exit(void) |
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{ |
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debug_unregister(pci_debug_msg_id); |
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debug_unregister(pci_debug_err_id); |
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debugfs_remove(debugfs_root); |
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}
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