diff options
| -rw-r--r-- | drivers/dma/idxd/Makefile | 2 | ||||
| -rw-r--r-- | drivers/dma/idxd/debugfs.c | 138 | ||||
| -rw-r--r-- | drivers/dma/idxd/idxd.h | 9 | ||||
| -rw-r--r-- | drivers/dma/idxd/init.c | 12 | ||||
| -rw-r--r-- | include/uapi/linux/idxd.h | 6 |
5 files changed, 164 insertions, 3 deletions
diff --git a/drivers/dma/idxd/Makefile b/drivers/dma/idxd/Makefile index a1e9f2b3a37c..dc096839ac63 100644 --- a/drivers/dma/idxd/Makefile +++ b/drivers/dma/idxd/Makefile @@ -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 diff --git a/drivers/dma/idxd/debugfs.c b/drivers/dma/idxd/debugfs.c new file mode 100644 index 000000000000..9cfbd9b14c4c --- /dev/null +++ b/drivers/dma/idxd/debugfs.c @@ -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); +} diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h index c74681f02b18..b923b90b7299 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -330,6 +330,9 @@ 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) @@ -704,4 +707,10 @@ 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 diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index f44719a11c95..e21c4b7a1d32 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -669,6 +669,10 @@ 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); @@ -731,6 +735,7 @@ 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); @@ -788,6 +793,10 @@ 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; @@ -795,6 +804,8 @@ 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); @@ -815,5 +826,6 @@ 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); diff --git a/include/uapi/linux/idxd.h b/include/uapi/linux/idxd.h index 0bc8eea18586..e86199d09a91 100644 --- a/include/uapi/linux/idxd.h +++ b/include/uapi/linux/idxd.h @@ -311,7 +311,8 @@ 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 { @@ -368,7 +369,8 @@ 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; |