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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139// SPDX-License-Identifier: GPL-2.0/* Copyright(c) 2021 Intel Corporation. All rights rsvd. */#include <linux/init.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/pci.h>#include <linux/debugfs.h>#include <linux/io-64-nonatomic-lo-hi.h>#include <uapi/linux/idxd.h>#include "idxd.h"#include "registers.h"
static struct dentry *idxd_debugfs_dir;
static void dump_event_entry(struct idxd_device *idxd, struct seq_file *s, u16 index, int *count, bool processed){ struct idxd_evl *evl = idxd->evl; struct dsa_evl_entry *entry; struct dsa_completion_record *cr; u64 *raw; int i; int evl_strides = evl_ent_size(idxd) / sizeof(u64);
entry = (struct dsa_evl_entry *)evl->log + index;
if (!entry->e.desc_valid) return;
seq_printf(s, "Event Log entry %d (real index %u) processed: %u\n", *count, index, processed);
seq_printf(s, "desc valid %u wq idx valid %u\n" "batch %u fault rw %u priv %u error 0x%x\n" "wq idx %u op %#x pasid %u batch idx %u\n" "fault addr %#llx\n", entry->e.desc_valid, entry->e.wq_idx_valid, entry->e.batch, entry->e.fault_rw, entry->e.priv, entry->e.error, entry->e.wq_idx, entry->e.operation, entry->e.pasid, entry->e.batch_idx, entry->e.fault_addr);
cr = &entry->cr; seq_printf(s, "status %#x result %#x fault_info %#x bytes_completed %u\n" "fault addr %#llx inv flags %#x\n\n", cr->status, cr->result, cr->fault_info, cr->bytes_completed, cr->fault_addr, cr->invalid_flags);
raw = (u64 *)entry;
for (i = 0; i < evl_strides; i++) seq_printf(s, "entry[%d] = %#llx\n", i, raw[i]);
seq_puts(s, "\n"); *count += 1;}
static int debugfs_evl_show(struct seq_file *s, void *d){ struct idxd_device *idxd = s->private; struct idxd_evl *evl = idxd->evl; union evl_status_reg evl_status; u16 h, t, evl_size, i; int count = 0; bool processed = true;
if (!evl || !evl->log) return 0;
mutex_lock(&evl->lock);
evl_status.bits = ioread64(idxd->reg_base + IDXD_EVLSTATUS_OFFSET); t = evl_status.tail; h = evl_status.head; evl_size = evl->size;
seq_printf(s, "Event Log head %u tail %u interrupt pending %u\n\n", evl_status.head, evl_status.tail, evl_status.int_pending);
i = t; while (1) { i = (i + 1) % evl_size; if (i == t) break;
if (processed && i == h) processed = false; dump_event_entry(idxd, s, i, &count, processed); }
mutex_unlock(&evl->lock); return 0;}
DEFINE_SHOW_ATTRIBUTE(debugfs_evl);
int idxd_device_init_debugfs(struct idxd_device *idxd){ if (IS_ERR_OR_NULL(idxd_debugfs_dir)) return 0;
idxd->dbgfs_dir = debugfs_create_dir(dev_name(idxd_confdev(idxd)), idxd_debugfs_dir); if (IS_ERR(idxd->dbgfs_dir)) return PTR_ERR(idxd->dbgfs_dir);
if (idxd->evl) { idxd->dbgfs_evl_file = debugfs_create_file("event_log", 0400, idxd->dbgfs_dir, idxd, &debugfs_evl_fops); if (IS_ERR(idxd->dbgfs_evl_file)) { debugfs_remove_recursive(idxd->dbgfs_dir); idxd->dbgfs_dir = NULL; return PTR_ERR(idxd->dbgfs_evl_file); } }
return 0;}
void idxd_device_remove_debugfs(struct idxd_device *idxd){ debugfs_remove_recursive(idxd->dbgfs_dir);}
int idxd_init_debugfs(void){ if (!debugfs_initialized()) return 0;
idxd_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL); if (IS_ERR(idxd_debugfs_dir)) return PTR_ERR(idxd_debugfs_dir); return 0;}
void idxd_remove_debugfs(void){ debugfs_remove_recursive(idxd_debugfs_dir);}