![Eddie Wai](/assets/img/avatar_default.png)
Old version: 2.7.0.3 New version: 2.7.2.2 Signed-off-by: Eddie Wai <eddie.wai@broadcom.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
566 lines
15 KiB
C
566 lines
15 KiB
C
/* bnx2i.c: Broadcom NetXtreme II iSCSI driver.
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*
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* Copyright (c) 2006 - 2012 Broadcom Corporation
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* Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
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* Copyright (c) 2007, 2008 Mike Christie
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation.
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*
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* Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
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* Maintained by: Eddie Wai (eddie.wai@broadcom.com)
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*/
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#include "bnx2i.h"
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static struct list_head adapter_list = LIST_HEAD_INIT(adapter_list);
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static u32 adapter_count;
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#define DRV_MODULE_NAME "bnx2i"
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#define DRV_MODULE_VERSION "2.7.2.2"
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#define DRV_MODULE_RELDATE "Apr 25, 2012"
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static char version[] __devinitdata =
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"Broadcom NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
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" v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
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MODULE_AUTHOR("Anil Veerabhadrappa <anilgv@broadcom.com> and "
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"Eddie Wai <eddie.wai@broadcom.com>");
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MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709/57710/57711/57712"
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"/57800/57810/57840 iSCSI Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_MODULE_VERSION);
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static DEFINE_MUTEX(bnx2i_dev_lock);
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unsigned int event_coal_min = 24;
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module_param(event_coal_min, int, 0664);
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MODULE_PARM_DESC(event_coal_min, "Event Coalescing Minimum Commands");
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unsigned int event_coal_div = 2;
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module_param(event_coal_div, int, 0664);
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MODULE_PARM_DESC(event_coal_div, "Event Coalescing Divide Factor");
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unsigned int en_tcp_dack = 1;
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module_param(en_tcp_dack, int, 0664);
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MODULE_PARM_DESC(en_tcp_dack, "Enable TCP Delayed ACK");
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unsigned int error_mask1 = 0x00;
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module_param(error_mask1, uint, 0664);
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MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1");
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unsigned int error_mask2 = 0x00;
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module_param(error_mask2, uint, 0664);
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MODULE_PARM_DESC(error_mask2, "Config FW iSCSI Error Mask #2");
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unsigned int sq_size;
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module_param(sq_size, int, 0664);
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MODULE_PARM_DESC(sq_size, "Configure SQ size");
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unsigned int rq_size = BNX2I_RQ_WQES_DEFAULT;
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module_param(rq_size, int, 0664);
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MODULE_PARM_DESC(rq_size, "Configure RQ size");
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u64 iscsi_error_mask = 0x00;
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DEFINE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
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static int bnx2i_cpu_callback(struct notifier_block *nfb,
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unsigned long action, void *hcpu);
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/* notification function for CPU hotplug events */
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static struct notifier_block bnx2i_cpu_notifier = {
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.notifier_call = bnx2i_cpu_callback,
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};
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/**
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* bnx2i_identify_device - identifies NetXtreme II device type
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* @hba: Adapter structure pointer
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*
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* This function identifies the NX2 device type and sets appropriate
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* queue mailbox register access method, 5709 requires driver to
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* access MBOX regs using *bin* mode
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*/
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void bnx2i_identify_device(struct bnx2i_hba *hba)
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{
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hba->cnic_dev_type = 0;
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if ((hba->pci_did == PCI_DEVICE_ID_NX2_5706) ||
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(hba->pci_did == PCI_DEVICE_ID_NX2_5706S))
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set_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type);
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else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5708) ||
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(hba->pci_did == PCI_DEVICE_ID_NX2_5708S))
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set_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type);
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else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5709) ||
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(hba->pci_did == PCI_DEVICE_ID_NX2_5709S)) {
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set_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type);
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hba->mail_queue_access = BNX2I_MQ_BIN_MODE;
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} else if (hba->pci_did == PCI_DEVICE_ID_NX2_57710 ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57711 ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57711E ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57712 ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57712E ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57800 ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57800_MF ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57800_VF ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57810 ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57810_MF ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57810_VF ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57840 ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57840_MF ||
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hba->pci_did == PCI_DEVICE_ID_NX2_57840_VF)
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set_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type);
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else
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printk(KERN_ALERT "bnx2i: unknown device, 0x%x\n",
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hba->pci_did);
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}
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/**
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* get_adapter_list_head - returns head of adapter list
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*/
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struct bnx2i_hba *get_adapter_list_head(void)
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{
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struct bnx2i_hba *hba = NULL;
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struct bnx2i_hba *tmp_hba;
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if (!adapter_count)
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goto hba_not_found;
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mutex_lock(&bnx2i_dev_lock);
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list_for_each_entry(tmp_hba, &adapter_list, link) {
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if (tmp_hba->cnic && tmp_hba->cnic->cm_select_dev) {
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hba = tmp_hba;
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break;
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}
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}
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mutex_unlock(&bnx2i_dev_lock);
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hba_not_found:
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return hba;
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}
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/**
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* bnx2i_find_hba_for_cnic - maps cnic device instance to bnx2i adapter instance
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* @cnic: pointer to cnic device instance
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*
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*/
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struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic)
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{
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struct bnx2i_hba *hba, *temp;
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mutex_lock(&bnx2i_dev_lock);
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list_for_each_entry_safe(hba, temp, &adapter_list, link) {
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if (hba->cnic == cnic) {
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mutex_unlock(&bnx2i_dev_lock);
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return hba;
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}
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}
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mutex_unlock(&bnx2i_dev_lock);
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return NULL;
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}
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/**
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* bnx2i_start - cnic callback to initialize & start adapter instance
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* @handle: transparent handle pointing to adapter structure
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*
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* This function maps adapter structure to pcidev structure and initiates
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* firmware handshake to enable/initialize on chip iscsi components
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* This bnx2i - cnic interface api callback is issued after following
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* 2 conditions are met -
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* a) underlying network interface is up (marked by event 'NETDEV_UP'
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* from netdev
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* b) bnx2i adapter instance is registered
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*/
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void bnx2i_start(void *handle)
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{
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#define BNX2I_INIT_POLL_TIME (1000 / HZ)
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struct bnx2i_hba *hba = handle;
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int i = HZ;
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/*
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* We should never register devices that don't support iSCSI
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* (see bnx2i_init_one), so something is wrong if we try to
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* start a iSCSI adapter on hardware with 0 supported iSCSI
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* connections
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*/
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BUG_ON(!hba->cnic->max_iscsi_conn);
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bnx2i_send_fw_iscsi_init_msg(hba);
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while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--)
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msleep(BNX2I_INIT_POLL_TIME);
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}
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/**
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* bnx2i_chip_cleanup - local routine to handle chip cleanup
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* @hba: Adapter instance to register
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*
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* Driver checks if adapter still has any active connections before
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* executing the cleanup process
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*/
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static void bnx2i_chip_cleanup(struct bnx2i_hba *hba)
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{
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struct bnx2i_endpoint *bnx2i_ep;
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struct list_head *pos, *tmp;
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if (hba->ofld_conns_active) {
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/* Stage to force the disconnection
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* This is the case where the daemon is either slow or
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* not present
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*/
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printk(KERN_ALERT "bnx2i: (%s) chip cleanup for %d active "
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"connections\n", hba->netdev->name,
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hba->ofld_conns_active);
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mutex_lock(&hba->net_dev_lock);
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list_for_each_safe(pos, tmp, &hba->ep_active_list) {
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bnx2i_ep = list_entry(pos, struct bnx2i_endpoint, link);
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/* Clean up the chip only */
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bnx2i_hw_ep_disconnect(bnx2i_ep);
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bnx2i_ep->cm_sk = NULL;
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}
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mutex_unlock(&hba->net_dev_lock);
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}
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}
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/**
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* bnx2i_stop - cnic callback to shutdown adapter instance
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* @handle: transparent handle pointing to adapter structure
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*
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* driver checks if adapter is already in shutdown mode, if not start
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* the shutdown process
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*/
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void bnx2i_stop(void *handle)
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{
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struct bnx2i_hba *hba = handle;
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int conns_active;
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int wait_delay = 1 * HZ;
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/* check if cleanup happened in GOING_DOWN context */
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if (!test_and_set_bit(ADAPTER_STATE_GOING_DOWN,
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&hba->adapter_state)) {
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iscsi_host_for_each_session(hba->shost,
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bnx2i_drop_session);
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wait_delay = hba->hba_shutdown_tmo;
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}
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/* Wait for inflight offload connection tasks to complete before
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* proceeding. Forcefully terminate all connection recovery in
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* progress at the earliest, either in bind(), send_pdu(LOGIN),
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* or conn_start()
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*/
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wait_event_interruptible_timeout(hba->eh_wait,
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(list_empty(&hba->ep_ofld_list) &&
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list_empty(&hba->ep_destroy_list)),
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2 * HZ);
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/* Wait for all endpoints to be torn down, Chip will be reset once
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* control returns to network driver. So it is required to cleanup and
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* release all connection resources before returning from this routine.
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*/
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while (hba->ofld_conns_active) {
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conns_active = hba->ofld_conns_active;
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wait_event_interruptible_timeout(hba->eh_wait,
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(hba->ofld_conns_active != conns_active),
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wait_delay);
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if (hba->ofld_conns_active == conns_active)
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break;
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}
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bnx2i_chip_cleanup(hba);
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/* This flag should be cleared last so that ep_disconnect() gracefully
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* cleans up connection context
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*/
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clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
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clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
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}
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/**
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* bnx2i_init_one - initialize an adapter instance and allocate memory resources
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* @hba: bnx2i adapter instance
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* @cnic: cnic device handle
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*
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* Global resource lock is held during critical sections below. This routine is
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* called from either cnic_register_driver() or device hot plug context and
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* and does majority of device specific initialization
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*/
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static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
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{
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int rc;
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mutex_lock(&bnx2i_dev_lock);
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if (!cnic->max_iscsi_conn) {
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printk(KERN_ALERT "bnx2i: dev %s does not support "
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"iSCSI\n", hba->netdev->name);
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rc = -EOPNOTSUPP;
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goto out;
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}
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hba->cnic = cnic;
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rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
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if (!rc) {
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hba->age++;
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set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
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list_add_tail(&hba->link, &adapter_list);
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adapter_count++;
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} else if (rc == -EBUSY) /* duplicate registration */
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printk(KERN_ALERT "bnx2i, duplicate registration"
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"hba=%p, cnic=%p\n", hba, cnic);
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else if (rc == -EAGAIN)
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printk(KERN_ERR "bnx2i, driver not registered\n");
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else if (rc == -EINVAL)
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printk(KERN_ERR "bnx2i, invalid type %d\n", CNIC_ULP_ISCSI);
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else
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printk(KERN_ERR "bnx2i dev reg, unknown error, %d\n", rc);
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out:
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mutex_unlock(&bnx2i_dev_lock);
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return rc;
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}
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/**
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* bnx2i_ulp_init - initialize an adapter instance
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* @dev: cnic device handle
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*
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* Called from cnic_register_driver() context to initialize all enumerated
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* cnic devices. This routine allocate adapter structure and other
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* device specific resources.
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*/
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void bnx2i_ulp_init(struct cnic_dev *dev)
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{
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struct bnx2i_hba *hba;
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/* Allocate a HBA structure for this device */
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hba = bnx2i_alloc_hba(dev);
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if (!hba) {
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printk(KERN_ERR "bnx2i init: hba initialization failed\n");
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return;
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}
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/* Get PCI related information and update hba struct members */
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clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
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if (bnx2i_init_one(hba, dev)) {
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printk(KERN_ERR "bnx2i - hba %p init failed\n", hba);
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bnx2i_free_hba(hba);
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}
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}
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/**
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* bnx2i_ulp_exit - shuts down adapter instance and frees all resources
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* @dev: cnic device handle
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*
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*/
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void bnx2i_ulp_exit(struct cnic_dev *dev)
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{
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struct bnx2i_hba *hba;
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hba = bnx2i_find_hba_for_cnic(dev);
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if (!hba) {
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printk(KERN_INFO "bnx2i_ulp_exit: hba not "
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"found, dev 0x%p\n", dev);
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return;
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}
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mutex_lock(&bnx2i_dev_lock);
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list_del_init(&hba->link);
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adapter_count--;
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if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
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hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
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clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
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}
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mutex_unlock(&bnx2i_dev_lock);
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bnx2i_free_hba(hba);
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}
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/**
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* bnx2i_percpu_thread_create - Create a receive thread for an
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* online CPU
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*
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* @cpu: cpu index for the online cpu
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*/
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static void bnx2i_percpu_thread_create(unsigned int cpu)
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{
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struct bnx2i_percpu_s *p;
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struct task_struct *thread;
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p = &per_cpu(bnx2i_percpu, cpu);
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thread = kthread_create_on_node(bnx2i_percpu_io_thread, (void *)p,
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cpu_to_node(cpu),
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"bnx2i_thread/%d", cpu);
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/* bind thread to the cpu */
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if (likely(!IS_ERR(thread))) {
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kthread_bind(thread, cpu);
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p->iothread = thread;
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wake_up_process(thread);
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}
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}
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static void bnx2i_percpu_thread_destroy(unsigned int cpu)
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{
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struct bnx2i_percpu_s *p;
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struct task_struct *thread;
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struct bnx2i_work *work, *tmp;
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/* Prevent any new work from being queued for this CPU */
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p = &per_cpu(bnx2i_percpu, cpu);
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spin_lock_bh(&p->p_work_lock);
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thread = p->iothread;
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p->iothread = NULL;
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/* Free all work in the list */
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list_for_each_entry_safe(work, tmp, &p->work_list, list) {
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list_del_init(&work->list);
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bnx2i_process_scsi_cmd_resp(work->session,
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work->bnx2i_conn, &work->cqe);
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kfree(work);
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}
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spin_unlock_bh(&p->p_work_lock);
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if (thread)
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kthread_stop(thread);
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}
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/**
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* bnx2i_cpu_callback - Handler for CPU hotplug events
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*
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* @nfb: The callback data block
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* @action: The event triggering the callback
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* @hcpu: The index of the CPU that the event is for
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*
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* This creates or destroys per-CPU data for iSCSI
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*
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* Returns NOTIFY_OK always.
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*/
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static int bnx2i_cpu_callback(struct notifier_block *nfb,
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unsigned long action, void *hcpu)
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{
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unsigned cpu = (unsigned long)hcpu;
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switch (action) {
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case CPU_ONLINE:
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case CPU_ONLINE_FROZEN:
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printk(KERN_INFO "bnx2i: CPU %x online: Create Rx thread\n",
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cpu);
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bnx2i_percpu_thread_create(cpu);
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break;
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case CPU_DEAD:
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case CPU_DEAD_FROZEN:
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printk(KERN_INFO "CPU %x offline: Remove Rx thread\n", cpu);
|
|
bnx2i_percpu_thread_destroy(cpu);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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);
|
|
|
|
mutex_init(&bnx2i_dev_lock);
|
|
|
|
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;
|
|
}
|
|
|
|
for_each_online_cpu(cpu)
|
|
bnx2i_percpu_thread_create(cpu);
|
|
|
|
/* Initialize per CPU interrupt thread */
|
|
register_hotcpu_notifier(&bnx2i_cpu_notifier);
|
|
|
|
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;
|
|
unsigned cpu = 0;
|
|
|
|
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);
|
|
|
|
unregister_hotcpu_notifier(&bnx2i_cpu_notifier);
|
|
|
|
for_each_online_cpu(cpu)
|
|
bnx2i_percpu_thread_destroy(cpu);
|
|
|
|
iscsi_unregister_transport(&bnx2i_iscsi_transport);
|
|
cnic_unregister_driver(CNIC_ULP_ISCSI);
|
|
}
|
|
|
|
module_init(bnx2i_mod_init);
|
|
module_exit(bnx2i_mod_exit);
|