1 files changed, 438 insertions, 0 deletions

diff --git a/drivers/scsi/bnx2i/bnx2i_init.c b/drivers/scsi/bnx2i/bnx2i_init.c
new file mode 100644
index 000000000000..ae4b2d588fd3
--- /dev/null
+++ b/drivers/scsi/bnx2i/bnx2i_init.c
@@ -0,0 +1,438 @@
+/* bnx2i.c: Broadcom NetXtreme II iSCSI driver.
+ *
+ * Copyright (c) 2006 - 2009 Broadcom Corporation
+ * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
+ * Copyright (c) 2007, 2008 Mike Christie
+ *
+ * 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: Anil Veerabhadrappa (anilgv@broadcom.com)
+ */
+
+#include "bnx2i.h"
+
+static struct list_head adapter_list = LIST_HEAD_INIT(adapter_list);
+static u32 adapter_count;
+static int bnx2i_reg_device;
+
+#define DRV_MODULE_NAME         "bnx2i"
+#define DRV_MODULE_VERSION      "2.0.1d"
+#define DRV_MODULE_RELDATE      "Mar 25, 2009"
+
+static char version[] __devinitdata =
+                "Broadcom NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
+                " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
+
+
+MODULE_AUTHOR("Anil Veerabhadrappa <anilgv@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709 iSCSI Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_MODULE_VERSION);
+
+static DEFINE_RWLOCK(bnx2i_dev_lock);
+
+unsigned int event_coal_div = 1;
+module_param(event_coal_div, int, 0664);
+MODULE_PARM_DESC(event_coal_div, "Event Coalescing Divide Factor");
+
+unsigned int en_tcp_dack = 1;
+module_param(en_tcp_dack, int, 0664);
+MODULE_PARM_DESC(en_tcp_dack, "Enable TCP Delayed ACK");
+
+unsigned int error_mask1 = 0x00;
+module_param(error_mask1, int, 0664);
+MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1");
+
+unsigned int error_mask2 = 0x00;
+module_param(error_mask2, int, 0664);
+MODULE_PARM_DESC(error_mask2, "Config FW iSCSI Error Mask #2");
+
+unsigned int sq_size;
+module_param(sq_size, int, 0664);
+MODULE_PARM_DESC(sq_size, "Configure SQ size");
+
+unsigned int rq_size = BNX2I_RQ_WQES_DEFAULT;
+module_param(rq_size, int, 0664);
+MODULE_PARM_DESC(rq_size, "Configure RQ size");
+
+u64 iscsi_error_mask = 0x00;
+
+static void bnx2i_unreg_one_device(struct bnx2i_hba *hba) ;
+
+
+/**
+ * bnx2i_identify_device - identifies NetXtreme II device type
+ * @hba:                Adapter structure pointer
+ *
+ * This function identifies the NX2 device type and sets appropriate
+ *      queue mailbox register access method, 5709 requires driver to
+ *      access MBOX regs using *bin* mode
+ */
+void bnx2i_identify_device(struct bnx2i_hba *hba)
+{
+        hba->cnic_dev_type = 0;
+        if ((hba->pci_did == PCI_DEVICE_ID_NX2_5706) ||
+            (hba->pci_did == PCI_DEVICE_ID_NX2_5706S))
+                set_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type);
+        else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5708) ||
+            (hba->pci_did == PCI_DEVICE_ID_NX2_5708S))
+                set_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type);
+        else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5709) ||
+            (hba->pci_did == PCI_DEVICE_ID_NX2_5709S)) {
+                set_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type);
+                hba->mail_queue_access = BNX2I_MQ_BIN_MODE;
+        } else if (hba->pci_did == PCI_DEVICE_ID_NX2_57710 ||
+                   hba->pci_did == PCI_DEVICE_ID_NX2_57711)
+                set_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type);
+}
+
+
+/**
+ * get_adapter_list_head - returns head of adapter list
+ */
+struct bnx2i_hba *get_adapter_list_head(void)
+{
+        struct bnx2i_hba *hba = NULL;
+        struct bnx2i_hba *tmp_hba;
+
+        if (!adapter_count)
+                goto hba_not_found;
+
+        read_lock(&bnx2i_dev_lock);
+        list_for_each_entry(tmp_hba, &adapter_list, link) {
+                if (tmp_hba->cnic && tmp_hba->cnic->cm_select_dev) {
+                        hba = tmp_hba;
+                        break;
+                }
+        }
+        read_unlock(&bnx2i_dev_lock);
+hba_not_found:
+        return hba;
+}
+
+
+/**
+ * bnx2i_find_hba_for_cnic - maps cnic device instance to bnx2i adapter instance
+ * @cnic:       pointer to cnic device instance
+ *
+ */
+struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic)
+{
+        struct bnx2i_hba *hba, *temp;
+
+        read_lock(&bnx2i_dev_lock);
+        list_for_each_entry_safe(hba, temp, &adapter_list, link) {
+                if (hba->cnic == cnic) {
+                        read_unlock(&bnx2i_dev_lock);
+                        return hba;
+                }
+        }
+        read_unlock(&bnx2i_dev_lock);
+        return NULL;
+}
+
+
+/**
+ * bnx2i_start - cnic callback to initialize & start adapter instance
+ * @handle:     transparent handle pointing to adapter structure
+ *
+ * This function maps adapter structure to pcidev structure and initiates
+ *      firmware handshake to enable/initialize on chip iscsi components
+ *      This bnx2i - cnic interface api callback is issued after following
+ *      2 conditions are met -
+ *        a) underlying network interface is up (marked by event 'NETDEV_UP'
+ *              from netdev
+ *        b) bnx2i adapter instance is registered
+ */
+void bnx2i_start(void *handle)
+{
+#define BNX2I_INIT_POLL_TIME    (1000 / HZ)
+        struct bnx2i_hba *hba = handle;
+        int i = HZ;
+
+        bnx2i_send_fw_iscsi_init_msg(hba);
+        while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--)
+                msleep(BNX2I_INIT_POLL_TIME);
+}
+
+
+/**
+ * bnx2i_stop - cnic callback to shutdown adapter instance
+ * @handle:     transparent handle pointing to adapter structure
+ *
+ * driver checks if adapter is already in shutdown mode, if not start
+ *      the shutdown process
+ */
+void bnx2i_stop(void *handle)
+{
+        struct bnx2i_hba *hba = handle;
+
+        /* check if cleanup happened in GOING_DOWN context */
+        clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
+        if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN,
+                                &hba->adapter_state))
+                iscsi_host_for_each_session(hba->shost,
+                                            bnx2i_drop_session);
+}
+
+/**
+ * bnx2i_register_device - register bnx2i adapter instance with the cnic driver
+ * @hba:        Adapter instance to register
+ *
+ * registers bnx2i adapter instance with the cnic driver while holding the
+ *      adapter structure lock
+ */
+void bnx2i_register_device(struct bnx2i_hba *hba)
+{
+        if (test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
+            test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
+                return;
+        }
+
+        hba->cnic->register_device(hba->cnic, CNIC_ULP_ISCSI, hba);
+
+        spin_lock(&hba->lock);
+        bnx2i_reg_device++;
+        spin_unlock(&hba->lock);
+
+        set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+}
+
+
+/**
+ * bnx2i_reg_dev_all - registers all adapter instances with the cnic driver
+ *
+ * registers all bnx2i adapter instances with the cnic driver while holding
+ *      the global resource lock
+ */
+void bnx2i_reg_dev_all(void)
+{
+        struct bnx2i_hba *hba, *temp;
+
+        read_lock(&bnx2i_dev_lock);
+        list_for_each_entry_safe(hba, temp, &adapter_list, link)
+                bnx2i_register_device(hba);
+        read_unlock(&bnx2i_dev_lock);
+}
+
+
+/**
+ * bnx2i_unreg_one_device - unregister adapter instance with the cnic driver
+ * @hba:        Adapter instance to unregister
+ *
+ * registers bnx2i adapter instance with the cnic driver while holding
+ *      the adapter structure lock
+ */
+static void bnx2i_unreg_one_device(struct bnx2i_hba *hba)
+{
+        if (hba->ofld_conns_active ||
+            !test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) ||
+            test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state))
+                return;
+
+        hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
+
+        spin_lock(&hba->lock);
+        bnx2i_reg_device--;
+        spin_unlock(&hba->lock);
+
+        /* ep_disconnect could come before NETDEV_DOWN, driver won't
+         * see NETDEV_DOWN as it already unregistered itself.
+         */
+        hba->adapter_state = 0;
+        clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+}
+
+/**
+ * bnx2i_unreg_dev_all - unregisters all bnx2i instances with the cnic driver
+ *
+ * unregisters all bnx2i adapter instances with the cnic driver while holding
+ *      the global resource lock
+ */
+void bnx2i_unreg_dev_all(void)
+{
+        struct bnx2i_hba *hba, *temp;
+
+        read_lock(&bnx2i_dev_lock);
+        list_for_each_entry_safe(hba, temp, &adapter_list, link)
+                bnx2i_unreg_one_device(hba);
+        read_unlock(&bnx2i_dev_lock);
+}
+
+
+/**
+ * bnx2i_init_one - initialize an adapter instance and allocate memory resources
+ * @hba:        bnx2i adapter instance
+ * @cnic:       cnic device handle
+ *
+ * Global resource lock and host adapter lock is held during critical sections
+ *      below. This routine is called from cnic_register_driver() context and
+ *      work horse thread which does majority of device specific initialization
+ */
+static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
+{
+        int rc;
+
+        read_lock(&bnx2i_dev_lock);
+        if (bnx2i_reg_device &&
+            !test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
+                rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
+                if (rc)         /* duplicate registration */
+                        printk(KERN_ERR "bnx2i- dev reg failed\n");
+
+                spin_lock(&hba->lock);
+                bnx2i_reg_device++;
+                hba->age++;
+                spin_unlock(&hba->lock);
+
+                set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+        }
+        read_unlock(&bnx2i_dev_lock);
+
+        write_lock(&bnx2i_dev_lock);
+        list_add_tail(&hba->link, &adapter_list);
+        adapter_count++;
+        write_unlock(&bnx2i_dev_lock);
+        return 0;
+}
+
+
+/**
+ * bnx2i_ulp_init - initialize an adapter instance
+ * @dev:        cnic device handle
+ *
+ * Called from cnic_register_driver() context to initialize all enumerated
+ *      cnic devices. This routine allocate adapter structure and other
+ *      device specific resources.
+ */
+void bnx2i_ulp_init(struct cnic_dev *dev)
+{
+        struct bnx2i_hba *hba;
+
+        /* Allocate a HBA structure for this device */
+        hba = bnx2i_alloc_hba(dev);
+        if (!hba) {
+                printk(KERN_ERR "bnx2i init: hba initialization failed\n");
+                return;
+        }
+
+        /* Get PCI related information and update hba struct members */
+        clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+        if (bnx2i_init_one(hba, dev)) {
+                printk(KERN_ERR "bnx2i - hba %p init failed\n", hba);
+                bnx2i_free_hba(hba);
+        } else
+                hba->cnic = dev;
+}
+
+
+/**
+ * bnx2i_ulp_exit - shuts down adapter instance and frees all resources
+ * @dev:        cnic device handle
+ *
+ */
+void bnx2i_ulp_exit(struct cnic_dev *dev)
+{
+        struct bnx2i_hba *hba;
+
+        hba = bnx2i_find_hba_for_cnic(dev);
+        if (!hba) {
+                printk(KERN_INFO "bnx2i_ulp_exit: hba not "
+                                 "found, dev 0x%p\n", dev);
+                return;
+        }
+        write_lock(&bnx2i_dev_lock);
+        list_del_init(&hba->link);
+        adapter_count--;
+
+        if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
+                hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
+                clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+
+                spin_lock(&hba->lock);
+                bnx2i_reg_device--;
+                spin_unlock(&hba->lock);
+        }
+        write_unlock(&bnx2i_dev_lock);
+
+        bnx2i_free_hba(hba);
+}
+
+
+/**
+ * bnx2i_mod_init - module init entry point
+ *
+ * initialize any driver wide global data structures such as endpoint pool,
+ *      tcp port manager/queue, sysfs. finally driver will register itself
+ *      with the cnic module
+ */
+static int __init bnx2i_mod_init(void)
+{
+        int err;
+
+        printk(KERN_INFO "%s", version);
+
+        if (!is_power_of_2(sq_size))
+                sq_size = roundup_pow_of_two(sq_size);
+
+        bnx2i_scsi_xport_template =
+                        iscsi_register_transport(&bnx2i_iscsi_transport);
+        if (!bnx2i_scsi_xport_template) {
+                printk(KERN_ERR "Could not register bnx2i transport.\n");
+                err = -ENOMEM;
+                goto out;
+        }
+
+        err = cnic_register_driver(CNIC_ULP_ISCSI, &bnx2i_cnic_cb);
+        if (err) {
+                printk(KERN_ERR "Could not register bnx2i cnic driver.\n");
+                goto unreg_xport;
+        }
+
+        return 0;
+
+unreg_xport:
+        iscsi_unregister_transport(&bnx2i_iscsi_transport);
+out:
+        return err;
+}
+
+
+/**
+ * bnx2i_mod_exit - module cleanup/exit entry point
+ *
+ * Global resource lock and host adapter lock is held during critical sections
+ *      in this function. Driver will browse through the adapter list, cleans-up
+ *      each instance, unregisters iscsi transport name and finally driver will
+ *      unregister itself with the cnic module
+ */
+static void __exit bnx2i_mod_exit(void)
+{
+        struct bnx2i_hba *hba;
+
+        write_lock(&bnx2i_dev_lock);
+        while (!list_empty(&adapter_list)) {
+                hba = list_entry(adapter_list.next, struct bnx2i_hba, link);
+                list_del(&hba->link);
+                adapter_count--;
+
+                if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
+                        hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
+                        clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+                        bnx2i_reg_device--;
+                }
+
+                write_unlock(&bnx2i_dev_lock);
+                bnx2i_free_hba(hba);
+                write_lock(&bnx2i_dev_lock);
+        }
+        write_unlock(&bnx2i_dev_lock);
+
+        iscsi_unregister_transport(&bnx2i_iscsi_transport);
+        cnic_unregister_driver(CNIC_ULP_ISCSI);
+}
+
+module_init(bnx2i_mod_init);
+module_exit(bnx2i_mod_exit);