@@ -1,7 +1,7 @@
ccflags-y += -DDEFAULT_SYMBOL_NAMESPACE=IDXD
obj-$(CONFIG_INTEL_IDXD) += idxd.o
-idxd-y := init.o irq.o device.o sysfs.o submit.o dma.o cdev.o
+idxd-y := init.o irq.o device.o sysfs.o submit.o dma.o cdev.o debugfs.o
idxd-$(CONFIG_INTEL_IDXD_PERFMON) += perfmon.o
new file mode 100644
@@ -0,0 +1,138 @@
+// 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;
+
+ spin_lock(&evl->lock);
+
+ h = evl->head;
+ evl_status.bits = ioread64(idxd->reg_base + IDXD_EVLSTATUS_OFFSET);
+ t = evl_status.tail;
+ 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);
+ }
+
+ spin_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);
+}
@@ -329,6 +329,9 @@ struct idxd_device {
unsigned long *opcap_bmap;
struct idxd_evl *evl;
+
+ struct dentry *dbgfs_dir;
+ struct dentry *dbgfs_evl_file;
};
static inline unsigned int evl_ent_size(struct idxd_device *idxd)
@@ -702,4 +705,10 @@ static inline void perfmon_init(void) {}
static inline void perfmon_exit(void) {}
#endif
+/* debugfs */
+int idxd_device_init_debugfs(struct idxd_device *idxd);
+void idxd_device_remove_debugfs(struct idxd_device *idxd);
+int idxd_init_debugfs(void);
+void idxd_remove_debugfs(void);
+
#endif
@@ -661,6 +661,10 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto err_dev_register;
}
+ rc = idxd_device_init_debugfs(idxd);
+ if (rc)
+ dev_warn(dev, "IDXD debugfs failed to setup\n");
+
dev_info(&pdev->dev, "Intel(R) Accelerator Device (v%x)\n",
idxd->hw.version);
@@ -723,6 +727,7 @@ static void idxd_remove(struct pci_dev *pdev)
idxd_shutdown(pdev);
if (device_pasid_enabled(idxd))
idxd_disable_system_pasid(idxd);
+ idxd_device_remove_debugfs(idxd);
irq_entry = idxd_get_ie(idxd, 0);
free_irq(irq_entry->vector, irq_entry);
@@ -780,6 +785,10 @@ static int __init idxd_init_module(void)
if (err)
goto err_cdev_register;
+ err = idxd_init_debugfs();
+ if (err)
+ goto err_debugfs;
+
err = pci_register_driver(&idxd_pci_driver);
if (err)
goto err_pci_register;
@@ -787,6 +796,8 @@ static int __init idxd_init_module(void)
return 0;
err_pci_register:
+ idxd_remove_debugfs();
+err_debugfs:
idxd_cdev_remove();
err_cdev_register:
idxd_driver_unregister(&idxd_user_drv);
@@ -807,5 +818,6 @@ static void __exit idxd_exit_module(void)
pci_unregister_driver(&idxd_pci_driver);
idxd_cdev_remove();
perfmon_exit();
+ idxd_remove_debugfs();
}
module_exit(idxd_exit_module);
@@ -286,7 +286,8 @@ struct dsa_completion_record {
uint8_t result;
uint8_t dif_status;
};
- uint16_t rsvd;
+ uint8_t fault_info;
+ uint8_t rsvd;
uint32_t bytes_completed;
uint64_t fault_addr;
union {
@@ -335,7 +336,8 @@ struct dsa_raw_completion_record {
struct iax_completion_record {
volatile uint8_t status;
uint8_t error_code;
- uint16_t rsvd;
+ uint8_t fault_info;
+ uint8_t rsvd;
uint32_t bytes_completed;
uint64_t fault_addr;
uint32_t invalid_flags;