165 lines
3.7 KiB
C
165 lines
3.7 KiB
C
/*
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* Copyright IBM Corp. 2012
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*
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* Author(s):
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* Jan Glauber <jang@linux.vnet.ibm.com>
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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_perf_names[] = {
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/* hardware counters */
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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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"DMA read bytes",
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"DMA write bytes",
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/* software counters */
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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 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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u64 *stat;
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int i;
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if (!zdev)
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return 0;
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if (!zdev->fmb)
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return seq_printf(m, "FMB statistics disabled\n");
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/* header */
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seq_printf(m, "FMB @ %p\n", zdev->fmb);
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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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/* hardware counters */
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stat = (u64 *) &zdev->fmb->ld_ops;
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for (i = 0; i < 4; i++)
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seq_printf(m, "%26s:\t%llu\n",
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pci_perf_names[i], *(stat + i));
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if (zdev->fmb->dma_valid)
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for (i = 4; i < 6; i++)
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seq_printf(m, "%26s:\t%llu\n",
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pci_perf_names[i], *(stat + i));
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/* software counters */
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for (i = 6; i < ARRAY_SIZE(pci_perf_names); i++)
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seq_printf(m, "%26s:\t%llu\n",
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pci_perf_names[i],
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atomic64_read((atomic64_t *) (stat + i)));
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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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switch (val) {
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case 0:
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rc = zpci_fmb_disable_device(zdev);
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if (rc)
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return rc;
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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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if (rc)
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return rc;
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break;
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}
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return 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)
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{
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zdev->debugfs_dev = debugfs_create_dir(dev_name(&zdev->pdev->dev),
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debugfs_root);
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if (IS_ERR(zdev->debugfs_dev))
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zdev->debugfs_dev = NULL;
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zdev->debugfs_perf = debugfs_create_file("statistics",
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S_IFREG | S_IRUGO | S_IWUSR,
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zdev->debugfs_dev, zdev,
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&debugfs_pci_perf_fops);
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if (IS_ERR(zdev->debugfs_perf))
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zdev->debugfs_perf = NULL;
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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(zdev->debugfs_perf);
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debugfs_remove(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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