[SCSI] cxgb3i: Add cxgb3i iSCSI driver.

This patch implements the cxgb3i iscsi connection acceleration for the
open-iscsi initiator.

The cxgb3i driver offers the iscsi PDU based offload:
- digest insertion and verification
- payload direct-placement into host memory buffer.

Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 107 insertions, 0 deletions

diff --git a/drivers/scsi/cxgb3i/cxgb3i_init.c b/drivers/scsi/cxgb3i/cxgb3i_init.c
new file mode 100644
index 000000000000..091ecb4d9f3d
--- /dev/null
+++ b/drivers/scsi/cxgb3i/cxgb3i_init.c
@@ -0,0 +1,107 @@
+/* cxgb3i_init.c: Chelsio S3xx iSCSI driver.
+ *
+ * Copyright (c) 2008 Chelsio Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Karen Xie (kxie@chelsio.com)
+ */
+
+#include "cxgb3i.h"
+
+#define DRV_MODULE_NAME         "cxgb3i"
+#define DRV_MODULE_VERSION      "1.0.0"
+#define DRV_MODULE_RELDATE      "Jun. 1, 2008"
+
+static char version[] =
+        "Chelsio S3xx iSCSI Driver " DRV_MODULE_NAME
+        " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
+
+MODULE_AUTHOR("Karen Xie <kxie@chelsio.com>");
+MODULE_DESCRIPTION("Chelsio S3xx iSCSI Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_MODULE_VERSION);
+
+static void open_s3_dev(struct t3cdev *);
+static void close_s3_dev(struct t3cdev *);
+
+static cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS];
+static struct cxgb3_client t3c_client = {
+        .name = "iscsi_cxgb3",
+        .handlers = cxgb3i_cpl_handlers,
+        .add = open_s3_dev,
+        .remove = close_s3_dev,
+};
+
+/**
+ * open_s3_dev - register with cxgb3 LLD
+ * @t3dev:      cxgb3 adapter instance
+ */
+static void open_s3_dev(struct t3cdev *t3dev)
+{
+        static int vers_printed;
+
+        if (!vers_printed) {
+                printk(KERN_INFO "%s", version);
+                vers_printed = 1;
+        }
+
+        cxgb3i_sdev_add(t3dev, &t3c_client);
+        cxgb3i_adapter_add(t3dev);
+}
+
+/**
+ * close_s3_dev - de-register with cxgb3 LLD
+ * @t3dev:      cxgb3 adapter instance
+ */
+static void close_s3_dev(struct t3cdev *t3dev)
+{
+        cxgb3i_adapter_remove(t3dev);
+        cxgb3i_sdev_remove(t3dev);
+}
+
+/**
+ * cxgb3i_init_module - module init entry point
+ *
+ * initialize any driver wide global data structures and register itself
+ *      with the cxgb3 module
+ */
+static int __init cxgb3i_init_module(void)
+{
+        int err;
+
+        err = cxgb3i_sdev_init(cxgb3i_cpl_handlers);
+        if (err < 0)
+                return err;
+
+        err = cxgb3i_iscsi_init();
+        if (err < 0)
+                return err;
+
+        err = cxgb3i_pdu_init();
+        if (err < 0)
+                return err;
+
+        cxgb3_register_client(&t3c_client);
+
+        return 0;
+}
+
+/**
+ * cxgb3i_exit_module - module cleanup/exit entry point
+ *
+ * go through the driver hba list and for each hba, release any resource held.
+ *      and unregisters iscsi transport and the cxgb3 module
+ */
+static void __exit cxgb3i_exit_module(void)
+{
+        cxgb3_unregister_client(&t3c_client);
+        cxgb3i_pdu_cleanup();
+        cxgb3i_iscsi_cleanup();
+        cxgb3i_sdev_cleanup();
+}
+
+module_init(cxgb3i_init_module);
+module_exit(cxgb3i_exit_module);