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Diffstat (limited to 'drivers/scsi/bnx2i/bnx2i_init.c')
-rw-r--r--drivers/scsi/bnx2i/bnx2i_init.c550
1 files changed, 550 insertions, 0 deletions
diff --git a/drivers/scsi/bnx2i/bnx2i_init.c b/drivers/scsi/bnx2i/bnx2i_init.c
new file mode 100644
index 000000000..2b3f0c104
--- /dev/null
+++ b/drivers/scsi/bnx2i/bnx2i_init.c
@@ -0,0 +1,550 @@
+/* bnx2i.c: QLogic NetXtreme II iSCSI driver.
+ *
+ * Copyright (c) 2006 - 2013 Broadcom Corporation
+ * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2007, 2008 Mike Christie
+ * Copyright (c) 2014, QLogic Corporation
+ *
+ * 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)
+ * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
+ * Maintained by: QLogic-Storage-Upstream@qlogic.com
+ */
+
+#include "bnx2i.h"
+
+static struct list_head adapter_list = LIST_HEAD_INIT(adapter_list);
+static u32 adapter_count;
+
+#define DRV_MODULE_NAME "bnx2i"
+#define DRV_MODULE_VERSION "2.7.10.1"
+#define DRV_MODULE_RELDATE "Jul 16, 2014"
+
+static char version[] =
+ "QLogic NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
+ " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
+
+
+MODULE_AUTHOR("Anil Veerabhadrappa <anilgv@broadcom.com> and "
+ "Eddie Wai <eddie.wai@broadcom.com>");
+
+MODULE_DESCRIPTION("QLogic NetXtreme II BCM5706/5708/5709/57710/57711/57712"
+ "/57800/57810/57840 iSCSI Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_MODULE_VERSION);
+
+static DEFINE_MUTEX(bnx2i_dev_lock);
+
+unsigned int event_coal_min = 24;
+module_param(event_coal_min, int, 0664);
+MODULE_PARM_DESC(event_coal_min, "Event Coalescing Minimum Commands");
+
+unsigned int event_coal_div = 2;
+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, uint, 0664);
+MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1");
+
+unsigned int error_mask2 = 0x00;
+module_param(error_mask2, uint, 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;
+
+DEFINE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
+
+/**
+ * bnx2i_identify_device - identifies NetXtreme II device type
+ * @hba: Adapter structure pointer
+ * @dev: Corresponding cnic device
+ *
+ * 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, struct cnic_dev *dev)
+{
+ hba->cnic_dev_type = 0;
+ if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
+ 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 (test_bit(CNIC_F_BNX2X_CLASS, &dev->flags)) {
+ set_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type);
+ } else {
+ printk(KERN_ALERT "bnx2i: unknown device, 0x%x\n",
+ hba->pci_did);
+ }
+}
+
+
+/**
+ * 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;
+
+ mutex_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;
+ }
+ }
+ mutex_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;
+
+ mutex_lock(&bnx2i_dev_lock);
+ list_for_each_entry_safe(hba, temp, &adapter_list, link) {
+ if (hba->cnic == cnic) {
+ mutex_unlock(&bnx2i_dev_lock);
+ return hba;
+ }
+ }
+ mutex_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;
+
+ /* On some bnx2x devices, it is possible that iSCSI is no
+ * longer supported after firmware is downloaded. In that
+ * case, the iscsi_init_msg will return failure.
+ */
+
+ bnx2i_send_fw_iscsi_init_msg(hba);
+ while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) &&
+ !test_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state) && i--)
+ msleep(BNX2I_INIT_POLL_TIME);
+}
+
+
+/**
+ * bnx2i_chip_cleanup - local routine to handle chip cleanup
+ * @hba: Adapter instance to register
+ *
+ * Driver checks if adapter still has any active connections before
+ * executing the cleanup process
+ */
+static void bnx2i_chip_cleanup(struct bnx2i_hba *hba)
+{
+ struct bnx2i_endpoint *bnx2i_ep;
+ struct list_head *pos, *tmp;
+
+ if (hba->ofld_conns_active) {
+ /* Stage to force the disconnection
+ * This is the case where the daemon is either slow or
+ * not present
+ */
+ printk(KERN_ALERT "bnx2i: (%s) chip cleanup for %d active "
+ "connections\n", hba->netdev->name,
+ hba->ofld_conns_active);
+ mutex_lock(&hba->net_dev_lock);
+ list_for_each_safe(pos, tmp, &hba->ep_active_list) {
+ bnx2i_ep = list_entry(pos, struct bnx2i_endpoint, link);
+ /* Clean up the chip only */
+ bnx2i_hw_ep_disconnect(bnx2i_ep);
+ bnx2i_ep->cm_sk = NULL;
+ }
+ mutex_unlock(&hba->net_dev_lock);
+ }
+}
+
+
+/**
+ * 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;
+ int conns_active;
+ int wait_delay = 1 * HZ;
+
+ /* check if cleanup happened in GOING_DOWN context */
+ if (!test_and_set_bit(ADAPTER_STATE_GOING_DOWN,
+ &hba->adapter_state)) {
+ iscsi_host_for_each_session(hba->shost,
+ bnx2i_drop_session);
+ wait_delay = hba->hba_shutdown_tmo;
+ }
+ /* Wait for inflight offload connection tasks to complete before
+ * proceeding. Forcefully terminate all connection recovery in
+ * progress at the earliest, either in bind(), send_pdu(LOGIN),
+ * or conn_start()
+ */
+ wait_event_interruptible_timeout(hba->eh_wait,
+ (list_empty(&hba->ep_ofld_list) &&
+ list_empty(&hba->ep_destroy_list)),
+ 2 * HZ);
+ /* Wait for all endpoints to be torn down, Chip will be reset once
+ * control returns to network driver. So it is required to cleanup and
+ * release all connection resources before returning from this routine.
+ */
+ while (hba->ofld_conns_active) {
+ conns_active = hba->ofld_conns_active;
+ wait_event_interruptible_timeout(hba->eh_wait,
+ (hba->ofld_conns_active != conns_active),
+ wait_delay);
+ if (hba->ofld_conns_active == conns_active)
+ break;
+ }
+ bnx2i_chip_cleanup(hba);
+
+ /* This flag should be cleared last so that ep_disconnect() gracefully
+ * cleans up connection context
+ */
+ clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
+ clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
+}
+
+
+/**
+ * bnx2i_init_one - initialize an adapter instance and allocate memory resources
+ * @hba: bnx2i adapter instance
+ * @cnic: cnic device handle
+ *
+ * Global resource lock is held during critical sections below. This routine is
+ * called from either cnic_register_driver() or device hot plug context and
+ * and does majority of device specific initialization
+ */
+static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
+{
+ int rc;
+
+ mutex_lock(&bnx2i_dev_lock);
+ if (!cnic->max_iscsi_conn) {
+ printk(KERN_ALERT "bnx2i: dev %s does not support "
+ "iSCSI\n", hba->netdev->name);
+ rc = -EOPNOTSUPP;
+ goto out;
+ }
+
+ hba->cnic = cnic;
+ rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
+ if (!rc) {
+ hba->age++;
+ set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+ list_add_tail(&hba->link, &adapter_list);
+ adapter_count++;
+ } else if (rc == -EBUSY) /* duplicate registration */
+ printk(KERN_ALERT "bnx2i, duplicate registration"
+ "hba=%p, cnic=%p\n", hba, cnic);
+ else if (rc == -EAGAIN)
+ printk(KERN_ERR "bnx2i, driver not registered\n");
+ else if (rc == -EINVAL)
+ printk(KERN_ERR "bnx2i, invalid type %d\n", CNIC_ULP_ISCSI);
+ else
+ printk(KERN_ERR "bnx2i dev reg, unknown error, %d\n", rc);
+
+out:
+ mutex_unlock(&bnx2i_dev_lock);
+
+ return rc;
+}
+
+
+/**
+ * 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);
+ }
+}
+
+
+/**
+ * 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;
+ }
+ mutex_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);
+ }
+ mutex_unlock(&bnx2i_dev_lock);
+
+ bnx2i_free_hba(hba);
+}
+
+
+/**
+ * bnx2i_get_stats - Retrieve various statistic from iSCSI offload
+ * @handle: bnx2i_hba
+ *
+ * function callback exported via bnx2i - cnic driver interface to
+ * retrieve various iSCSI offload related statistics.
+ */
+int bnx2i_get_stats(void *handle)
+{
+ struct bnx2i_hba *hba = handle;
+ struct iscsi_stats_info *stats;
+
+ if (!hba)
+ return -EINVAL;
+
+ stats = (struct iscsi_stats_info *)hba->cnic->stats_addr;
+
+ if (!stats)
+ return -ENOMEM;
+
+ strlcpy(stats->version, DRV_MODULE_VERSION, sizeof(stats->version));
+ memcpy(stats->mac_add1 + 2, hba->cnic->mac_addr, ETH_ALEN);
+
+ stats->max_frame_size = hba->netdev->mtu;
+ stats->txq_size = hba->max_sqes;
+ stats->rxq_size = hba->max_cqes;
+
+ stats->txq_avg_depth = 0;
+ stats->rxq_avg_depth = 0;
+
+ GET_STATS_64(hba, stats, rx_pdus);
+ GET_STATS_64(hba, stats, rx_bytes);
+
+ GET_STATS_64(hba, stats, tx_pdus);
+ GET_STATS_64(hba, stats, tx_bytes);
+
+ return 0;
+}
+
+
+/**
+ * bnx2i_cpu_online - Create a receive thread for an online CPU
+ *
+ * @cpu: cpu index for the online cpu
+ */
+static int bnx2i_cpu_online(unsigned int cpu)
+{
+ struct bnx2i_percpu_s *p;
+ struct task_struct *thread;
+
+ p = &per_cpu(bnx2i_percpu, cpu);
+
+ thread = kthread_create_on_node(bnx2i_percpu_io_thread, (void *)p,
+ cpu_to_node(cpu),
+ "bnx2i_thread/%d", cpu);
+ if (IS_ERR(thread))
+ return PTR_ERR(thread);
+
+ /* bind thread to the cpu */
+ kthread_bind(thread, cpu);
+ p->iothread = thread;
+ wake_up_process(thread);
+ return 0;
+}
+
+static int bnx2i_cpu_offline(unsigned int cpu)
+{
+ struct bnx2i_percpu_s *p;
+ struct task_struct *thread;
+ struct bnx2i_work *work, *tmp;
+
+ /* Prevent any new work from being queued for this CPU */
+ p = &per_cpu(bnx2i_percpu, cpu);
+ spin_lock_bh(&p->p_work_lock);
+ thread = p->iothread;
+ p->iothread = NULL;
+
+ /* Free all work in the list */
+ list_for_each_entry_safe(work, tmp, &p->work_list, list) {
+ list_del_init(&work->list);
+ bnx2i_process_scsi_cmd_resp(work->session,
+ work->bnx2i_conn, &work->cqe);
+ kfree(work);
+ }
+
+ spin_unlock_bh(&p->p_work_lock);
+ if (thread)
+ kthread_stop(thread);
+ return 0;
+}
+
+static enum cpuhp_state bnx2i_online_state;
+
+/**
+ * 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;
+ unsigned cpu = 0;
+ struct bnx2i_percpu_s *p;
+
+ printk(KERN_INFO "%s", version);
+
+ if (sq_size && !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;
+ }
+
+ /* Create percpu kernel threads to handle iSCSI I/O completions */
+ for_each_possible_cpu(cpu) {
+ p = &per_cpu(bnx2i_percpu, cpu);
+ INIT_LIST_HEAD(&p->work_list);
+ spin_lock_init(&p->p_work_lock);
+ p->iothread = NULL;
+ }
+
+ err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/bnx2i:online",
+ bnx2i_cpu_online, bnx2i_cpu_offline);
+ if (err < 0)
+ goto unreg_driver;
+ bnx2i_online_state = err;
+ return 0;
+
+unreg_driver:
+ cnic_unregister_driver(CNIC_ULP_ISCSI);
+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;
+
+ mutex_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)) {
+ bnx2i_chip_cleanup(hba);
+ hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
+ clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+ }
+
+ bnx2i_free_hba(hba);
+ }
+ mutex_unlock(&bnx2i_dev_lock);
+
+ cpuhp_remove_state(bnx2i_online_state);
+
+ iscsi_unregister_transport(&bnx2i_iscsi_transport);
+ cnic_unregister_driver(CNIC_ULP_ISCSI);
+}
+
+module_init(bnx2i_mod_init);
+module_exit(bnx2i_mod_exit);