drivers/scsi/qla4xxx/ql4_os.c

Source file repositories/reference/linux-study-clean/drivers/scsi/qla4xxx/ql4_os.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/qla4xxx/ql4_os.c
Extension
.c
Size
290271 bytes
Lines
9959
Domain
Driver Families
Bucket
drivers/scsi
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static struct pci_driver qla4xxx_pci_driver = {
	.name		= DRIVER_NAME,
	.id_table	= qla4xxx_pci_tbl,
	.probe		= qla4xxx_probe_adapter,
	.remove		= qla4xxx_remove_adapter,
	.err_handler = &qla4xxx_err_handler,
};

static int __init qla4xxx_module_init(void)
{
	int ret;

	if (ql4xqfulltracking)
		qla4xxx_driver_template.track_queue_depth = 1;

	/* Allocate cache for SRBs. */
	srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
				       SLAB_HWCACHE_ALIGN, NULL);
	if (srb_cachep == NULL) {
		printk(KERN_ERR
		       "%s: Unable to allocate SRB cache..."
		       "Failing load!\n", DRIVER_NAME);
		ret = -ENOMEM;
		goto no_srp_cache;
	}

	/* Derive version string. */
	strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
	if (ql4xextended_error_logging)
		strcat(qla4xxx_version_str, "-debug");

	qla4xxx_scsi_transport =
		iscsi_register_transport(&qla4xxx_iscsi_transport);
	if (!qla4xxx_scsi_transport){
		ret = -ENODEV;
		goto release_srb_cache;
	}

	ret = pci_register_driver(&qla4xxx_pci_driver);
	if (ret)
		goto unregister_transport;

	printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
	return 0;

unregister_transport:
	iscsi_unregister_transport(&qla4xxx_iscsi_transport);
release_srb_cache:
	kmem_cache_destroy(srb_cachep);
no_srp_cache:
	return ret;
}

static void __exit qla4xxx_module_exit(void)
{
	pci_unregister_driver(&qla4xxx_pci_driver);
	iscsi_unregister_transport(&qla4xxx_iscsi_transport);
	kmem_cache_destroy(srb_cachep);
}

module_init(qla4xxx_module_init);
module_exit(qla4xxx_module_exit);

MODULE_AUTHOR("QLogic Corporation");
MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(QLA4XXX_DRIVER_VERSION);

Annotation

Implementation Notes