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/* bnx2i.h: Broadcom NetXtreme II iSCSI driver.
*
* Copyright (c) 2006 - 2011 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)
* Maintained by: Eddie Wai (eddie.wai@broadcom.com)
*/
#ifndef _BNX2I_H_
#define _BNX2I_H_
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/in.h>
#include <linux/kfifo.h>
#include <linux/netdevice.h>
#include <linux/completion.h>
#include <linux/kthread.h>
#include <linux/cpu.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi.h>
#include <scsi/iscsi_proto.h>
#include <scsi/libiscsi.h>
#include <scsi/scsi_transport_iscsi.h>
#include "../../net/ethernet/broadcom/cnic_if.h"
#include "57xx_iscsi_hsi.h"
#include "57xx_iscsi_constants.h"
#define BNX2_ISCSI_DRIVER_NAME "bnx2i"
#define BNX2I_MAX_ADAPTERS 8
#define ISCSI_MAX_CONNS_PER_HBA 128
#define ISCSI_MAX_SESS_PER_HBA ISCSI_MAX_CONNS_PER_HBA
#define ISCSI_MAX_CMDS_PER_SESS 128
/* Total active commands across all connections supported by devices */
#define ISCSI_MAX_CMDS_PER_HBA_5708 (28 * (ISCSI_MAX_CMDS_PER_SESS - 1))
#define ISCSI_MAX_CMDS_PER_HBA_5709 (128 * (ISCSI_MAX_CMDS_PER_SESS - 1))
#define ISCSI_MAX_CMDS_PER_HBA_57710 (256 * (ISCSI_MAX_CMDS_PER_SESS - 1))
#define ISCSI_MAX_BDS_PER_CMD 32
#define MAX_PAGES_PER_CTRL_STRUCT_POOL 8
#define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS 4
#define BNX2I_5771X_DBELL_PAGE_SIZE 128
/* 5706/08 hardware has limit on maximum buffer size per BD it can handle */
#define MAX_BD_LENGTH 65535
#define BD_SPLIT_SIZE 32768
/* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */
#define BNX2I_SQ_WQES_MIN 16
#define BNX2I_570X_SQ_WQES_MAX 128
#define BNX2I_5770X_SQ_WQES_MAX 512
#define BNX2I_570X_SQ_WQES_DEFAULT 128
#define BNX2I_5770X_SQ_WQES_DEFAULT 128
#define BNX2I_570X_CQ_WQES_MAX 128
#define BNX2I_5770X_CQ_WQES_MAX 512
#define BNX2I_RQ_WQES_MIN 16
#define BNX2I_RQ_WQES_MAX 32
#define BNX2I_RQ_WQES_DEFAULT 16
/* CCELLs per conn */
#define BNX2I_CCELLS_MIN 16
#define BNX2I_CCELLS_MAX 96
#define BNX2I_CCELLS_DEFAULT 64
#define ITT_INVALID_SIGNATURE 0xFFFF
#define ISCSI_CMD_CLEANUP_TIMEOUT 100
#define BNX2I_CONN_CTX_BUF_SIZE 16384
#define BNX2I_SQ_WQE_SIZE 64
#define BNX2I_RQ_WQE_SIZE 256
#define BNX2I_CQE_SIZE 64
#define MB_KERNEL_CTX_SHIFT 8
#define MB_KERNEL_CTX_SIZE (1 << MB_KERNEL_CTX_SHIFT)
#define CTX_SHIFT 7
#define GET_CID_NUM(cid_addr) ((cid_addr) >> CTX_SHIFT)
#define CTX_OFFSET 0x10000
#define MAX_CID_CNT 0x4000
#define BNX2I_570X_PAGE_SIZE_DEFAULT 4096
/* 5709 context registers */
#define BNX2_MQ_CONFIG2 0x00003d00
#define BNX2_MQ_CONFIG2_CONT_SZ (0x7L<<4)
#define BNX2_MQ_CONFIG2_FIRST_L4L5 (0x1fL<<8)
/* 57710's BAR2 is mapped to doorbell registers */
#define BNX2X_DOORBELL_PCI_BAR 2
#define BNX2X_MAX_CQS 8
#define CNIC_ARM_CQE 1
#define CNIC_ARM_CQE_FP 2
#define CNIC_DISARM_CQE 0
#define REG_RD(__hba, offset) \
readl(__hba->regview + offset)
#define REG_WR(__hba, offset, val) \
writel(val, __hba->regview + offset)
/**
* struct generic_pdu_resc - login pdu resource structure
*
* @req_buf: driver buffer used to stage payload associated with
* the login request
* @req_dma_addr: dma address for iscsi login request payload buffer
* @req_buf_size: actual login request payload length
* @req_wr_ptr: pointer into login request buffer when next data is
* to be written
* @resp_hdr: iscsi header where iscsi login response header is to
* be recreated
* @resp_buf: buffer to stage login response payload
* @resp_dma_addr: login response payload buffer dma address
* @resp_buf_size: login response paylod length
* @resp_wr_ptr: pointer into login response buffer when next data is
* to be written
* @req_bd_tbl: iscsi login request payload BD table
* @req_bd_dma: login request BD table dma address
* @resp_bd_tbl: iscsi login response payload BD table
* @resp_bd_dma: login request BD table dma address
*
* following structure defines buffer info for generic pdus such as iSCSI Login,
* Logout and NOP
*/
struct generic_pdu_resc {
char *req_buf;
dma_addr_t req_dma_addr;
u32 req_buf_size;
char *req_wr_ptr;
struct iscsi_hdr resp_hdr;
char *resp_buf;
dma_addr_t resp_dma_addr;
u32 resp_buf_size;
char *resp_wr_ptr;
char *req_bd_tbl;
dma_addr_t req_bd_dma;
char *resp_bd_tbl;
dma_addr_t resp_bd_dma;
};
/**
* struct bd_resc_page - tracks DMA'able memory allocated for BD tables
*
* @link: list head to link elements
* @max_ptrs: maximun pointers that can be stored in this page
* @num_valid: number of pointer valid in this page
* @page: base addess for page pointer array
*
* structure to track DMA'able memory allocated for command BD tables
*/
struct bd_resc_page {
struct list_head link;
u32 max_ptrs;
u32 num_valid;
void *page[1];
};
/**
* struct io_bdt - I/O buffer destricptor table
*
* @bd_tbl: BD table's virtual address
* @bd_tbl_dma: BD table's dma address
* @bd_valid: num valid BD entries
*
* IO BD table
*/
struct io_bdt {
struct iscsi_bd *bd_tbl;
dma_addr_t bd_tbl_dma;
u16 bd_valid;
};
/**
* bnx2i_cmd - iscsi command structure
*
* @hdr: iSCSI header
* @conn: iscsi_conn pointer
* @scsi_cmd: SCSI-ML task pointer corresponding to this iscsi cmd
* @sg: SG list
* @io_tbl: buffer descriptor (BD) table
* @bd_tbl_dma: buffer descriptor (BD) table's dma address
* @req: bnx2i specific command request struct
*/
struct bnx2i_cmd {
struct iscsi_hdr hdr;
struct bnx2i_conn *conn;
struct scsi_cmnd *scsi_cmd;
struct scatterlist *sg;
struct io_bdt io_tbl;
dma_addr_t bd_tbl_dma;
struct bnx2i_cmd_request req;
};
/**
* struct bnx2i_conn - iscsi connection structure
*
* @cls_conn: pointer to iscsi cls conn
* @hba: adapter structure pointer
* @iscsi_conn_cid: iscsi conn id
* @fw_cid: firmware iscsi context id
* @ep: endpoint structure pointer
* @gen_pdu: login/nopout/logout pdu resources
* @violation_notified: bit mask used to track iscsi error/warning messages
* already printed out
* @work_cnt: keeps track of the number of outstanding work
*
* iSCSI connection structure
*/
struct bnx2i_conn {
struct iscsi_cls_conn *cls_conn;
struct bnx2i_hba *hba;
struct completion cmd_cleanup_cmpl;
u32 iscsi_conn_cid;
#define BNX2I_CID_RESERVED 0x5AFF
u32 fw_cid;
struct timer_list poll_timer;
/*
* Queue Pair (QP) related structure elements.
*/
struct bnx2i_endpoint *ep;
/*
* Buffer for login negotiation process
*/
struct generic_pdu_resc gen_pdu;
u64 violation_notified;
atomic_t work_cnt;
};
/**
* struct iscsi_cid_queue - Per adapter iscsi cid queue
*
* @cid_que_base: queue base memory
* @cid_que: queue memory pointer
* @cid_q_prod_idx: produce index
* @cid_q_cons_idx: consumer index
* @cid_q_max_idx: max index. used to detect wrap around condition
* @cid_free_cnt: queue size
* @conn_cid_tbl: iscsi cid to conn structure mapping table
*
* Per adapter iSCSI CID Queue
*/
struct iscsi_cid_queue {
void *cid_que_base;
u32 *cid_que;
u32 cid_q_prod_idx;
u32 cid_q_cons_idx;
u32 cid_q_max_idx;
u32 cid_free_cnt;
struct bnx2i_conn **conn_cid_tbl;
};
/**
* struct bnx2i_hba - bnx2i adapter structure
*
* @link: list head to link elements
* @cnic: pointer to cnic device
* @pcidev: pointer to pci dev
* @netdev: pointer to netdev structure
* @regview: mapped PCI register space
* @age: age, incremented by every recovery
* @cnic_dev_type: cnic device type, 5706/5708/5709/57710
* @mail_queue_access: mailbox queue access mode, applicable to 5709 only
* @reg_with_cnic: indicates whether the device is register with CNIC
* @adapter_state: adapter state, UP, GOING_DOWN, LINK_DOWN
* @mtu_supported: Ethernet MTU supported
* @shost: scsi host pointer
* @max_sqes: SQ size
* @max_rqes: RQ size
* @max_cqes: CQ size
* @num_ccell: number of command cells per connection
* @ofld_conns_active: active connection list
* @eh_wait: wait queue for the endpoint to shutdown
* @max_active_conns: max offload connections supported by this device
* @cid_que: iscsi cid queue
* @ep_rdwr_lock: read / write lock to synchronize various ep lists
* @ep_ofld_list: connection list for pending offload completion
* @ep_active_list: connection list for active offload endpoints
* @ep_destroy_list: connection list for pending offload completion
* @mp_bd_tbl: BD table to be used with middle path requests
* @mp_bd_dma: DMA address of 'mp_bd_tbl' memory buffer
* @dummy_buffer: Dummy buffer to be used with zero length scsicmd reqs
* @dummy_buf_dma: DMA address of 'dummy_buffer' memory buffer
* @lock: lock to synchonize access to hba structure
* @hba_shutdown_tmo: Timeout value to shutdown each connection
* @conn_teardown_tmo: Timeout value to tear down each connection
* @conn_ctx_destroy_tmo: Timeout value to destroy context of each connection
* @pci_did: PCI device ID
* @pci_vid: PCI vendor ID
* @pci_sdid: PCI subsystem device ID
* @pci_svid: PCI subsystem vendor ID
* @pci_func: PCI function number in system pci tree
* @pci_devno: PCI device number in system pci tree
* @num_wqe_sent: statistic counter, total wqe's sent
* @num_cqe_rcvd: statistic counter, total cqe's received
* @num_intr_claimed: statistic counter, total interrupts claimed
* @link_changed_count: statistic counter, num of link change notifications
* received
* @ipaddr_changed_count: statistic counter, num times IP address changed while
* at least one connection is offloaded
* @num_sess_opened: statistic counter, total num sessions opened
* @num_conn_opened: statistic counter, total num conns opened on this hba
* @ctx_ccell_tasks: captures number of ccells and tasks supported by
* currently offloaded connection, used to decode
* context memory
*
* Adapter Data Structure
*/
struct bnx2i_hba {
struct list_head link;
struct cnic_dev *cnic;
struct pci_dev *pcidev;
struct net_device *netdev;
void __iomem *regview;
u32 age;
unsigned long cnic_dev_type;
#define BNX2I_NX2_DEV_5706 0x0
#define BNX2I_NX2_DEV_5708 0x1
#define BNX2I_NX2_DEV_5709 0x2
#define BNX2I_NX2_DEV_57710 0x3
u32 mail_queue_access;
#define BNX2I_MQ_KERNEL_MODE 0x0
#define BNX2I_MQ_KERNEL_BYPASS_MODE 0x1
#define BNX2I_MQ_BIN_MODE 0x2
unsigned long reg_with_cnic;
#define BNX2I_CNIC_REGISTERED 1
unsigned long adapter_state;
#define ADAPTER_STATE_UP 0
#define ADAPTER_STATE_GOING_DOWN 1
#define ADAPTER_STATE_LINK_DOWN 2
#define ADAPTER_STATE_INIT_FAILED 31
unsigned int mtu_supported;
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