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550 lines
15 KiB
550 lines
15 KiB
/* bnx2i.c: QLogic NetXtreme II iSCSI driver. |
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* |
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* Copyright (c) 2006 - 2013 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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* Copyright (c) 2014, QLogic Corporation |
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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 ([email protected]) |
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* Previously Maintained by: Eddie Wai ([email protected]) |
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* Maintained by: [email protected] |
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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 "2.7.10.1" |
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#define DRV_MODULE_RELDATE "Jul 16, 2014" |
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static char version[] = |
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"QLogic 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 <[email protected]> and " |
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"Eddie Wai <[email protected]>"); |
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MODULE_DESCRIPTION("QLogic 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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/** |
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* bnx2i_identify_device - identifies NetXtreme II device type |
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* @hba: Adapter structure pointer |
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* @dev: Corresponding cnic device |
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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, struct cnic_dev *dev) |
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{ |
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hba->cnic_dev_type = 0; |
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if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) { |
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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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} |
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} else if (test_bit(CNIC_F_BNX2X_CLASS, &dev->flags)) { |
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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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/** |
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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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/* On some bnx2x devices, it is possible that iSCSI is no |
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* longer supported after firmware is downloaded. In that |
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* case, the iscsi_init_msg will return failure. |
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*/ |
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bnx2i_send_fw_iscsi_init_msg(hba); |
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while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && |
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!test_bit(ADAPTER_STATE_INIT_FAILED, &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_get_stats - Retrieve various statistic from iSCSI offload |
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* @handle: bnx2i_hba |
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* |
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* function callback exported via bnx2i - cnic driver interface to |
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* retrieve various iSCSI offload related statistics. |
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*/ |
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int bnx2i_get_stats(void *handle) |
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{ |
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struct bnx2i_hba *hba = handle; |
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struct iscsi_stats_info *stats; |
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if (!hba) |
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return -EINVAL; |
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stats = (struct iscsi_stats_info *)hba->cnic->stats_addr; |
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if (!stats) |
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return -ENOMEM; |
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strlcpy(stats->version, DRV_MODULE_VERSION, sizeof(stats->version)); |
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memcpy(stats->mac_add1 + 2, hba->cnic->mac_addr, ETH_ALEN); |
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stats->max_frame_size = hba->netdev->mtu; |
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stats->txq_size = hba->max_sqes; |
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stats->rxq_size = hba->max_cqes; |
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stats->txq_avg_depth = 0; |
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stats->rxq_avg_depth = 0; |
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GET_STATS_64(hba, stats, rx_pdus); |
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GET_STATS_64(hba, stats, rx_bytes); |
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GET_STATS_64(hba, stats, tx_pdus); |
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GET_STATS_64(hba, stats, tx_bytes); |
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return 0; |
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} |
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/** |
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* bnx2i_cpu_online - Create a receive thread for an 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 int bnx2i_cpu_online(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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if (IS_ERR(thread)) |
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return PTR_ERR(thread); |
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|
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/* bind thread to the cpu */ |
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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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return 0; |
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} |
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static int bnx2i_cpu_offline(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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|
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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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return 0; |
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} |
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static enum cpuhp_state bnx2i_online_state; |
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|
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/** |
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* bnx2i_mod_init - module init entry point |
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* |
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* initialize any driver wide global data structures such as endpoint pool, |
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* tcp port manager/queue, sysfs. finally driver will register itself |
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* with the cnic module |
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*/ |
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static int __init bnx2i_mod_init(void) |
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{ |
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int err; |
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unsigned cpu = 0; |
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struct bnx2i_percpu_s *p; |
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|
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printk(KERN_INFO "%s", version); |
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|
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if (sq_size && !is_power_of_2(sq_size)) |
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sq_size = roundup_pow_of_two(sq_size); |
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|
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bnx2i_scsi_xport_template = |
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iscsi_register_transport(&bnx2i_iscsi_transport); |
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if (!bnx2i_scsi_xport_template) { |
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printk(KERN_ERR "Could not register bnx2i transport.\n"); |
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err = -ENOMEM; |
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goto out; |
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} |
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|
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err = cnic_register_driver(CNIC_ULP_ISCSI, &bnx2i_cnic_cb); |
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if (err) { |
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printk(KERN_ERR "Could not register bnx2i cnic driver.\n"); |
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goto unreg_xport; |
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} |
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/* Create percpu kernel threads to handle iSCSI I/O completions */ |
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for_each_possible_cpu(cpu) { |
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p = &per_cpu(bnx2i_percpu, cpu); |
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INIT_LIST_HEAD(&p->work_list); |
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spin_lock_init(&p->p_work_lock); |
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p->iothread = NULL; |
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} |
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err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/bnx2i:online", |
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bnx2i_cpu_online, bnx2i_cpu_offline); |
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if (err < 0) |
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goto unreg_driver; |
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bnx2i_online_state = err; |
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return 0; |
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unreg_driver: |
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cnic_unregister_driver(CNIC_ULP_ISCSI); |
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unreg_xport: |
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iscsi_unregister_transport(&bnx2i_iscsi_transport); |
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out: |
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return err; |
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} |
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|
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|
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/** |
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* bnx2i_mod_exit - module cleanup/exit entry point |
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* |
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* Global resource lock and host adapter lock is held during critical sections |
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* in this function. Driver will browse through the adapter list, cleans-up |
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* each instance, unregisters iscsi transport name and finally driver will |
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* unregister itself with the cnic module |
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*/ |
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static void __exit bnx2i_mod_exit(void) |
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{ |
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struct bnx2i_hba *hba; |
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|
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mutex_lock(&bnx2i_dev_lock); |
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while (!list_empty(&adapter_list)) { |
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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);
|
|
|