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[SCSI] bnx2i: Add bnx2i iSCSI driver.

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New iSCSI driver for Broadcom BNX2 devices.  The driver interfaces with
the CNIC driver to access the hardware.

Signed-off-by: Anil Veerabhadrappa <anilgv@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Michael Chan 2009-06-08 18:14:44 -07:00 committed by James Bottomley
parent a463696039
commit cf4e636385
11 changed files with 7496 additions and 0 deletions
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1
drivers/scsi/Kconfig
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@ -354,6 +354,7 @@ config ISCSI_TCP
http://open-iscsi.org
source "drivers/scsi/cxgb3i/Kconfig"
source "drivers/scsi/bnx2i/Kconfig"
config SGIWD93_SCSI
tristate "SGI WD93C93 SCSI Driver"

1
drivers/scsi/Makefile
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@ -129,6 +129,7 @@ obj-$(CONFIG_SCSI_STEX) += stex.o
obj-$(CONFIG_SCSI_MVSAS) += mvsas/
obj-$(CONFIG_PS3_ROM) += ps3rom.o
obj-$(CONFIG_SCSI_CXGB3_ISCSI) += libiscsi.o libiscsi_tcp.o cxgb3i/
obj-$(CONFIG_SCSI_BNX2_ISCSI) += libiscsi.o bnx2i/
obj-$(CONFIG_ARM) += arm/

155
drivers/scsi/bnx2i/57xx_iscsi_constants.h Normal file
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@ -0,0 +1,155 @@
/* 57xx_iscsi_constants.h: Broadcom NetXtreme II iSCSI HSI
*
* Copyright (c) 2006 - 2009 Broadcom 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)
*/
#ifndef __57XX_ISCSI_CONSTANTS_H_
#define __57XX_ISCSI_CONSTANTS_H_
/**
* This file defines HSI constants for the iSCSI flows
*/
/* iSCSI request op codes */
#define ISCSI_OPCODE_CLEANUP_REQUEST (7)
/* iSCSI response/messages op codes */
#define ISCSI_OPCODE_CLEANUP_RESPONSE (0x27)
#define ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION (0)
/* iSCSI task types */
#define ISCSI_TASK_TYPE_READ (0)
#define ISCSI_TASK_TYPE_WRITE (1)
#define ISCSI_TASK_TYPE_MPATH (2)
/* initial CQ sequence numbers */
#define ISCSI_INITIAL_SN (1)
/* KWQ (kernel work queue) layer codes */
#define ISCSI_KWQE_LAYER_CODE (6)
/* KWQ (kernel work queue) request op codes */
#define ISCSI_KWQE_OPCODE_OFFLOAD_CONN1 (0)
#define ISCSI_KWQE_OPCODE_OFFLOAD_CONN2 (1)
#define ISCSI_KWQE_OPCODE_UPDATE_CONN (2)
#define ISCSI_KWQE_OPCODE_DESTROY_CONN (3)
#define ISCSI_KWQE_OPCODE_INIT1 (4)
#define ISCSI_KWQE_OPCODE_INIT2 (5)
/* KCQ (kernel completion queue) response op codes */
#define ISCSI_KCQE_OPCODE_OFFLOAD_CONN (0x10)
#define ISCSI_KCQE_OPCODE_UPDATE_CONN (0x12)
#define ISCSI_KCQE_OPCODE_DESTROY_CONN (0x13)
#define ISCSI_KCQE_OPCODE_INIT (0x14)
#define ISCSI_KCQE_OPCODE_FW_CLEAN_TASK (0x15)
#define ISCSI_KCQE_OPCODE_TCP_RESET (0x16)
#define ISCSI_KCQE_OPCODE_TCP_SYN (0x17)
#define ISCSI_KCQE_OPCODE_TCP_FIN (0X18)
#define ISCSI_KCQE_OPCODE_TCP_ERROR (0x19)
#define ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION (0x20)
#define ISCSI_KCQE_OPCODE_ISCSI_ERROR (0x21)
/* KCQ (kernel completion queue) completion status */
#define ISCSI_KCQE_COMPLETION_STATUS_SUCCESS (0x0)
#define ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE (0x1)
#define ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE (0x2)
#define ISCSI_KCQE_COMPLETION_STATUS_CTX_FREE_FAILURE (0x3)
#define ISCSI_KCQE_COMPLETION_STATUS_NIC_ERROR (0x4)
#define ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR (0x5)
#define ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR (0x6)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_UNEXPECTED_OPCODE (0xa)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE (0xb)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN (0xc)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT (0xd)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN (0xe)
/* Response */
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN (0xf)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T (0x10)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_IS_ZERO (0x2c)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG (0x2d)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0 (0x11)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1 (0x12)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2 (0x13)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3 (0x14)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4 (0x15)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5 (0x16)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6 (0x17)
/* Data-In */
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN (0x18)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN (0x19)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO (0x1a)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV (0x1b)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN (0x1c)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN (0x1d)
/* R2T */
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF (0x1f)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN (0x20)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN (0x21)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0 (0x22)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1 (0x23)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED (0x24)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV (0x25)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN (0x26)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO (0x27)
/* TMF */
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN (0x28)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN (0x29)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN (0x2a)
#define ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP (0x2b)
/* IP/TCP processing errors: */
#define ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT (0x40)
#define ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS (0x41)
#define ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG (0x42)
#define ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_MAX_RTRANS (0x43)
/* iSCSI licensing errors */
/* general iSCSI license not installed */
#define ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED (0x50)
/* additional LOM specific iSCSI license not installed */
#define ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED (0x51)
/* SQ/RQ/CQ DB structure sizes */
#define ISCSI_SQ_DB_SIZE (16)
#define ISCSI_RQ_DB_SIZE (16)
#define ISCSI_CQ_DB_SIZE (80)
#define ISCSI_SQN_TO_NOTIFY_NOT_VALID 0xFFFF
/* Page size codes (for flags field in connection offload request) */
#define ISCSI_PAGE_SIZE_256 (0)
#define ISCSI_PAGE_SIZE_512 (1)
#define ISCSI_PAGE_SIZE_1K (2)
#define ISCSI_PAGE_SIZE_2K (3)
#define ISCSI_PAGE_SIZE_4K (4)
#define ISCSI_PAGE_SIZE_8K (5)
#define ISCSI_PAGE_SIZE_16K (6)
#define ISCSI_PAGE_SIZE_32K (7)
#define ISCSI_PAGE_SIZE_64K (8)
#define ISCSI_PAGE_SIZE_128K (9)
#define ISCSI_PAGE_SIZE_256K (10)
#define ISCSI_PAGE_SIZE_512K (11)
#define ISCSI_PAGE_SIZE_1M (12)
#define ISCSI_PAGE_SIZE_2M (13)
#define ISCSI_PAGE_SIZE_4M (14)
#define ISCSI_PAGE_SIZE_8M (15)
/* Iscsi PDU related defines */
#define ISCSI_HEADER_SIZE (48)
#define ISCSI_DIGEST_SHIFT (2)
#define ISCSI_DIGEST_SIZE (4)
#define B577XX_ISCSI_CONNECTION_TYPE 3
#endif /*__57XX_ISCSI_CONSTANTS_H_ */

1509
drivers/scsi/bnx2i/57xx_iscsi_hsi.h Normal file
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File diff suppressed because it is too large Load Diff

7
drivers/scsi/bnx2i/Kconfig Normal file
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@ -0,0 +1,7 @@
config SCSI_BNX2_ISCSI
tristate "Broadcom NetXtreme II iSCSI support"
select SCSI_ISCSI_ATTRS
select CNIC
---help---
This driver supports iSCSI offload for the Broadcom NetXtreme II
devices.

3
drivers/scsi/bnx2i/Makefile Normal file
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@ -0,0 +1,3 @@
bnx2i-y := bnx2i_init.o bnx2i_hwi.o bnx2i_iscsi.o bnx2i_sysfs.o
obj-$(CONFIG_SCSI_BNX2_ISCSI) += bnx2i.o

771
drivers/scsi/bnx2i/bnx2i.h Normal file
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@ -0,0 +1,771 @@
/* bnx2i.h: Broadcom NetXtreme II iSCSI driver.
*
* Copyright (c) 2006 - 2009 Broadcom Corporation
* Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
* Copyright (c) 2007, 2008 Mike Christie
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*
* Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
*/
#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/sched.h>
#include <linux/in.h>
#include <linux/kfifo.h>
#include <linux/netdevice.h>
#include <linux/completion.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/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
/* 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 256
#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
/* 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_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
*
* @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
*/
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
*
* iSCSI connection structure
*/
struct bnx2i_conn {
struct iscsi_cls_conn *cls_conn;
struct bnx2i_hba *hba;
struct completion cmd_cleanup_cmpl;
int is_bound;
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;
};
/**
* 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
* @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_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
* @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;
#define BNX2I_MAX_MTU_SUPPORTED 1500
struct Scsi_Host *shost;
u32 max_sqes;
u32 max_rqes;
u32 max_cqes;
u32 num_ccell;
int ofld_conns_active;
int max_active_conns;
struct iscsi_cid_queue cid_que;
rwlock_t ep_rdwr_lock;
struct list_head ep_ofld_list;
struct list_head ep_destroy_list;
/*
* BD table to be used with MP (Middle Path requests.
*/
char *mp_bd_tbl;
dma_addr_t mp_bd_dma;
char *dummy_buffer;
dma_addr_t dummy_buf_dma;
spinlock_t lock; /* protects hba structure access */
struct mutex net_dev_lock;/* sync net device access */
/*
* PCI related info.
*/
u16 pci_did;
u16 pci_vid;
u16 pci_sdid;
u16 pci_svid;
u16 pci_func;
u16 pci_devno;
/*
* Following are a bunch of statistics useful during development
* and later stage for score boarding.
*/
u32 num_wqe_sent;
u32 num_cqe_rcvd;
u32 num_intr_claimed;
u32 link_changed_count;
u32 ipaddr_changed_count;
u32 num_sess_opened;
u32 num_conn_opened;
unsigned int ctx_ccell_tasks;
};
/*******************************************************************************
* QP [ SQ / RQ / CQ ] info.
******************************************************************************/
/*
* SQ/RQ/CQ generic structure definition
*/
struct sqe {
u8 sqe_byte[BNX2I_SQ_WQE_SIZE];
};
struct rqe {
u8 rqe_byte[BNX2I_RQ_WQE_SIZE];
};
struct cqe {
u8 cqe_byte[BNX2I_CQE_SIZE];
};
enum {
#if defined(__LITTLE_ENDIAN)
CNIC_EVENT_COAL_INDEX = 0x0,
CNIC_SEND_DOORBELL = 0x4,
CNIC_EVENT_CQ_ARM = 0x7,
CNIC_RECV_DOORBELL = 0x8
#elif defined(__BIG_ENDIAN)
CNIC_EVENT_COAL_INDEX = 0x2,
CNIC_SEND_DOORBELL = 0x6,
CNIC_EVENT_CQ_ARM = 0x4,
CNIC_RECV_DOORBELL = 0xa
#endif
};
/*
* CQ DB
*/
struct bnx2x_iscsi_cq_pend_cmpl {
/* CQ producer, updated by Ustorm */
u16 ustrom_prod;
/* CQ pending completion counter */
u16 pend_cntr;
};
struct bnx2i_5771x_cq_db {
struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS];
/* CQ pending completion ITT array */
u16 itt[BNX2X_MAX_CQS];
/* Cstorm CQ sequence to notify array, updated by driver */;
u16 sqn[BNX2X_MAX_CQS];
u32 reserved[4] /* 16 byte allignment */;
};
struct bnx2i_5771x_sq_rq_db {
u16 prod_idx;
u8 reserved0[14]; /* Pad structure size to 16 bytes */
};
struct bnx2i_5771x_dbell_hdr {
u8 header;
/* 1 for rx doorbell, 0 for tx doorbell */
#define B577XX_DOORBELL_HDR_RX (0x1<<0)
#define B577XX_DOORBELL_HDR_RX_SHIFT 0
/* 0 for normal doorbell, 1 for advertise wnd doorbell */
#define B577XX_DOORBELL_HDR_DB_TYPE (0x1<<1)
#define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT 1
/* rdma tx only: DPM transaction size specifier (64/128/256/512B) */
#define B577XX_DOORBELL_HDR_DPM_SIZE (0x3<<2)
#define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT 2
/* connection type */
#define B577XX_DOORBELL_HDR_CONN_TYPE (0xF<<4)
#define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT 4
};
struct bnx2i_5771x_dbell {
struct bnx2i_5771x_dbell_hdr dbell;
u8 pad[3];
};
/**
* struct qp_info - QP (share queue region) atrributes structure
*
* @ctx_base: ioremapped pci register base to access doorbell register
* pertaining to this offloaded connection
* @sq_virt: virtual address of send queue (SQ) region
* @sq_phys: DMA address of SQ memory region
* @sq_mem_size: SQ size
* @sq_prod_qe: SQ producer entry pointer
* @sq_cons_qe: SQ consumer entry pointer
* @sq_first_qe: virtaul address of first entry in SQ
* @sq_last_qe: virtaul address of last entry in SQ
* @sq_prod_idx: SQ producer index
* @sq_cons_idx: SQ consumer index
* @sqe_left: number sq entry left
* @sq_pgtbl_virt: page table describing buffer consituting SQ region
* @sq_pgtbl_phys: dma address of 'sq_pgtbl_virt'
* @sq_pgtbl_size: SQ page table size
* @cq_virt: virtual address of completion queue (CQ) region
* @cq_phys: DMA address of RQ memory region
* @cq_mem_size: CQ size
* @cq_prod_qe: CQ producer entry pointer
* @cq_cons_qe: CQ consumer entry pointer
* @cq_first_qe: virtaul address of first entry in CQ
* @cq_last_qe: virtaul address of last entry in CQ
* @cq_prod_idx: CQ producer index
* @cq_cons_idx: CQ consumer index
* @cqe_left: number cq entry left
* @cqe_size: size of each CQ entry
* @cqe_exp_seq_sn: next expected CQE sequence number
* @cq_pgtbl_virt: page table describing buffer consituting CQ region
* @cq_pgtbl_phys: dma address of 'cq_pgtbl_virt'
* @cq_pgtbl_size: CQ page table size
* @rq_virt: virtual address of receive queue (RQ) region
* @rq_phys: DMA address of RQ memory region
* @rq_mem_size: RQ size
* @rq_prod_qe: RQ producer entry pointer
* @rq_cons_qe: RQ consumer entry pointer
* @rq_first_qe: virtaul address of first entry in RQ
* @rq_last_qe: virtaul address of last entry in RQ
* @rq_prod_idx: RQ producer index
* @rq_cons_idx: RQ consumer index
* @rqe_left: number rq entry left
* @rq_pgtbl_virt: page table describing buffer consituting RQ region
* @rq_pgtbl_phys: dma address of 'rq_pgtbl_virt'
* @rq_pgtbl_size: RQ page table size
*
* queue pair (QP) is a per connection shared data structure which is used
* to send work requests (SQ), receive completion notifications (CQ)
* and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure
* below holds queue memory, consumer/producer indexes and page table
* information
*/
struct qp_info {
void __iomem *ctx_base;
#define DPM_TRIGER_TYPE 0x40
#define BNX2I_570x_QUE_DB_SIZE 0
#define BNX2I_5771x_QUE_DB_SIZE 16
struct sqe *sq_virt;
dma_addr_t sq_phys;
u32 sq_mem_size;
struct sqe *sq_prod_qe;
struct sqe *sq_cons_qe;
struct sqe *sq_first_qe;
struct sqe *sq_last_qe;
u16 sq_prod_idx;
u16 sq_cons_idx;
u32 sqe_left;
void *sq_pgtbl_virt;
dma_addr_t sq_pgtbl_phys;
u32 sq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */
struct cqe *cq_virt;
dma_addr_t cq_phys;
u32 cq_mem_size;
struct cqe *cq_prod_qe;
struct cqe *cq_cons_qe;
struct cqe *cq_first_qe;
struct cqe *cq_last_qe;
u16 cq_prod_idx;
u16 cq_cons_idx;
u32 cqe_left;
u32 cqe_size;
u32 cqe_exp_seq_sn;
void *cq_pgtbl_virt;
dma_addr_t cq_pgtbl_phys;
u32 cq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */
struct rqe *rq_virt;
dma_addr_t rq_phys;
u32 rq_mem_size;
struct rqe *rq_prod_qe;
struct rqe *rq_cons_qe;
struct rqe *rq_first_qe;
struct rqe *rq_last_qe;
u16 rq_prod_idx;
u16 rq_cons_idx;
u32 rqe_left;
void *rq_pgtbl_virt;
dma_addr_t rq_pgtbl_phys;
u32 rq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */
};
/*
* CID handles
*/
struct ep_handles {
u32 fw_cid;
u32 drv_iscsi_cid;
u16 pg_cid;
u16 rsvd;
};
enum {
EP_STATE_IDLE = 0x0,
EP_STATE_PG_OFLD_START = 0x1,
EP_STATE_PG_OFLD_COMPL = 0x2,
EP_STATE_OFLD_START = 0x4,
EP_STATE_OFLD_COMPL = 0x8,
EP_STATE_CONNECT_START = 0x10,
EP_STATE_CONNECT_COMPL = 0x20,
EP_STATE_ULP_UPDATE_START = 0x40,
EP_STATE_ULP_UPDATE_COMPL = 0x80,
EP_STATE_DISCONN_START = 0x100,
EP_STATE_DISCONN_COMPL = 0x200,
EP_STATE_CLEANUP_START = 0x400,
EP_STATE_CLEANUP_CMPL = 0x800,
EP_STATE_TCP_FIN_RCVD = 0x1000,
EP_STATE_TCP_RST_RCVD = 0x2000,
EP_STATE_PG_OFLD_FAILED = 0x1000000,
EP_STATE_ULP_UPDATE_FAILED = 0x2000000,
EP_STATE_CLEANUP_FAILED = 0x4000000,
EP_STATE_OFLD_FAILED = 0x8000000,
EP_STATE_CONNECT_FAILED = 0x10000000,
EP_STATE_DISCONN_TIMEDOUT = 0x20000000,
};
/**
* struct bnx2i_endpoint - representation of tcp connection in NX2 world
*
* @link: list head to link elements
* @hba: adapter to which this connection belongs
* @conn: iscsi connection this EP is linked to
* @sess: iscsi session this EP is linked to
* @cm_sk: cnic sock struct
* @hba_age: age to detect if 'iscsid' issues ep_disconnect()
* after HBA reset is completed by bnx2i/cnic/bnx2
* modules
* @state: tracks offload connection state machine
* @teardown_mode: indicates if conn teardown is abortive or orderly
* @qp: QP information
* @ids: contains chip allocated *context id* & driver assigned
* *iscsi cid*
* @ofld_timer: offload timer to detect timeout
* @ofld_wait: wait queue
*
* Endpoint Structure - equivalent of tcp socket structure
*/
struct bnx2i_endpoint {
struct list_head link;
struct bnx2i_hba *hba;
struct bnx2i_conn *conn;
struct cnic_sock *cm_sk;
u32 hba_age;
u32 state;
unsigned long timestamp;
int num_active_cmds;
struct qp_info qp;
struct ep_handles ids;
#define ep_iscsi_cid ids.drv_iscsi_cid
#define ep_cid ids.fw_cid
#define ep_pg_cid ids.pg_cid
struct timer_list ofld_timer;
wait_queue_head_t ofld_wait;
};
/* Global variables */
extern unsigned int error_mask1, error_mask2;
extern u64 iscsi_error_mask;
extern unsigned int en_tcp_dack;
extern unsigned int event_coal_div;
extern struct scsi_transport_template *bnx2i_scsi_xport_template;
extern struct iscsi_transport bnx2i_iscsi_transport;
extern struct cnic_ulp_ops bnx2i_cnic_cb;
extern unsigned int sq_size;
extern unsigned int rq_size;
extern struct device_attribute *bnx2i_dev_attributes[];
/*
* Function Prototypes
*/
extern void bnx2i_identify_device(struct bnx2i_hba *hba);
extern void bnx2i_register_device(struct bnx2i_hba *hba);
extern void bnx2i_ulp_init(struct cnic_dev *dev);
extern void bnx2i_ulp_exit(struct cnic_dev *dev);
extern void bnx2i_start(void *handle);
extern void bnx2i_stop(void *handle);
extern void bnx2i_reg_dev_all(void);
extern void bnx2i_unreg_dev_all(void);
extern struct bnx2i_hba *get_adapter_list_head(void);
struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
u16 iscsi_cid);
int bnx2i_alloc_ep_pool(void);
void bnx2i_release_ep_pool(void);
struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba);
struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba);
struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic);
struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic);
void bnx2i_free_hba(struct bnx2i_hba *hba);
void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len);
void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count);
void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd);
void bnx2i_drop_session(struct iscsi_cls_session *session);
extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba);
extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
struct iscsi_task *mtask);
extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
struct iscsi_task *mtask);
extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
struct bnx2i_cmd *cmnd);
extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
struct iscsi_task *mtask, u32 ttt,
char *datap, int data_len, int unsol);
extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn,
struct iscsi_task *mtask);
extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba,
struct bnx2i_cmd *cmd);
extern void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
struct bnx2i_endpoint *ep);
extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
extern void bnx2i_send_conn_destroy(struct bnx2i_hba *hba,
struct bnx2i_endpoint *ep);
extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba,
struct bnx2i_endpoint *ep);
extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba,
struct bnx2i_endpoint *ep);
extern void bnx2i_ep_ofld_timer(unsigned long data);
extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list(
struct bnx2i_hba *hba, u32 iscsi_cid);
extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list(
struct bnx2i_hba *hba, u32 iscsi_cid);
extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep);
extern void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
/* Debug related function prototypes */
extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn);
extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn);
extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn);
extern void bnx2i_print_recv_state(struct bnx2i_conn *conn);
#endif

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drivers/scsi/bnx2i/bnx2i_hwi.c Normal file
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/* bnx2i.c: Broadcom NetXtreme II iSCSI driver.
*
* Copyright (c) 2006 - 2009 Broadcom Corporation
* Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
* Copyright (c) 2007, 2008 Mike Christie
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*
* Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
*/
#include "bnx2i.h"
static struct list_head adapter_list = LIST_HEAD_INIT(adapter_list);
static u32 adapter_count;
static int bnx2i_reg_device;
#define DRV_MODULE_NAME "bnx2i"
#define DRV_MODULE_VERSION "2.0.1d"
#define DRV_MODULE_RELDATE "Mar 25, 2009"
static char version[] __devinitdata =
"Broadcom NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
" v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
MODULE_AUTHOR("Anil Veerabhadrappa <anilgv@broadcom.com>");
MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709 iSCSI Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);
static DEFINE_RWLOCK(bnx2i_dev_lock);
unsigned int event_coal_div = 1;
module_param(event_coal_div, int, 0664);
MODULE_PARM_DESC(event_coal_div, "Event Coalescing Divide Factor");
unsigned int en_tcp_dack = 1;
module_param(en_tcp_dack, int, 0664);
MODULE_PARM_DESC(en_tcp_dack, "Enable TCP Delayed ACK");
unsigned int error_mask1 = 0x00;
module_param(error_mask1, int, 0664);
MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1");
unsigned int error_mask2 = 0x00;
module_param(error_mask2, int, 0664);
MODULE_PARM_DESC(error_mask2, "Config FW iSCSI Error Mask #2");
unsigned int sq_size;
module_param(sq_size, int, 0664);
MODULE_PARM_DESC(sq_size, "Configure SQ size");
unsigned int rq_size = BNX2I_RQ_WQES_DEFAULT;
module_param(rq_size, int, 0664);
MODULE_PARM_DESC(rq_size, "Configure RQ size");
u64 iscsi_error_mask = 0x00;
static void bnx2i_unreg_one_device(struct bnx2i_hba *hba) ;
/**
* bnx2i_identify_device - identifies NetXtreme II device type
* @hba: Adapter structure pointer
*
* This function identifies the NX2 device type and sets appropriate
* queue mailbox register access method, 5709 requires driver to
* access MBOX regs using *bin* mode
*/
void bnx2i_identify_device(struct bnx2i_hba *hba)
{
hba->cnic_dev_type = 0;
if ((hba->pci_did == PCI_DEVICE_ID_NX2_5706) ||
(hba->pci_did == PCI_DEVICE_ID_NX2_5706S))
set_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type);
else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5708) ||
(hba->pci_did == PCI_DEVICE_ID_NX2_5708S))
set_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type);
else if ((hba->pci_did == PCI_DEVICE_ID_NX2_5709) ||
(hba->pci_did == PCI_DEVICE_ID_NX2_5709S)) {
set_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type);
hba->mail_queue_access = BNX2I_MQ_BIN_MODE;
} else if (hba->pci_did == PCI_DEVICE_ID_NX2_57710 ||
hba->pci_did == PCI_DEVICE_ID_NX2_57711)
set_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type);
}
/**
* get_adapter_list_head - returns head of adapter list
*/
struct bnx2i_hba *get_adapter_list_head(void)
{
struct bnx2i_hba *hba = NULL;
struct bnx2i_hba *tmp_hba;
if (!adapter_count)
goto hba_not_found;
read_lock(&bnx2i_dev_lock);
list_for_each_entry(tmp_hba, &adapter_list, link) {
if (tmp_hba->cnic && tmp_hba->cnic->cm_select_dev) {
hba = tmp_hba;
break;
}
}
read_unlock(&bnx2i_dev_lock);
hba_not_found:
return hba;
}
/**
* bnx2i_find_hba_for_cnic - maps cnic device instance to bnx2i adapter instance
* @cnic: pointer to cnic device instance
*
*/
struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic)
{
struct bnx2i_hba *hba, *temp;
read_lock(&bnx2i_dev_lock);
list_for_each_entry_safe(hba, temp, &adapter_list, link) {
if (hba->cnic == cnic) {
read_unlock(&bnx2i_dev_lock);
return hba;
}
}
read_unlock(&bnx2i_dev_lock);
return NULL;
}
/**
* bnx2i_start - cnic callback to initialize & start adapter instance
* @handle: transparent handle pointing to adapter structure
*
* This function maps adapter structure to pcidev structure and initiates
* firmware handshake to enable/initialize on chip iscsi components
* This bnx2i - cnic interface api callback is issued after following
* 2 conditions are met -
* a) underlying network interface is up (marked by event 'NETDEV_UP'
* from netdev
* b) bnx2i adapter instance is registered
*/
void bnx2i_start(void *handle)
{
#define BNX2I_INIT_POLL_TIME (1000 / HZ)
struct bnx2i_hba *hba = handle;
int i = HZ;
bnx2i_send_fw_iscsi_init_msg(hba);
while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--)
msleep(BNX2I_INIT_POLL_TIME);
}
/**
* bnx2i_stop - cnic callback to shutdown adapter instance
* @handle: transparent handle pointing to adapter structure
*
* driver checks if adapter is already in shutdown mode, if not start
* the shutdown process
*/
void bnx2i_stop(void *handle)
{
struct bnx2i_hba *hba = handle;
/* check if cleanup happened in GOING_DOWN context */
clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN,
&hba->adapter_state))
iscsi_host_for_each_session(hba->shost,
bnx2i_drop_session);
}
/**
* bnx2i_register_device - register bnx2i adapter instance with the cnic driver
* @hba: Adapter instance to register
*
* registers bnx2i adapter instance with the cnic driver while holding the
* adapter structure lock
*/
void bnx2i_register_device(struct bnx2i_hba *hba)
{
if (test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
return;
}
hba->cnic->register_device(hba->cnic, CNIC_ULP_ISCSI, hba);
spin_lock(&hba->lock);
bnx2i_reg_device++;
spin_unlock(&hba->lock);
set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
}
/**
* bnx2i_reg_dev_all - registers all adapter instances with the cnic driver
*
* registers all bnx2i adapter instances with the cnic driver while holding
* the global resource lock
*/
void bnx2i_reg_dev_all(void)
{
struct bnx2i_hba *hba, *temp;
read_lock(&bnx2i_dev_lock);
list_for_each_entry_safe(hba, temp, &adapter_list, link)
bnx2i_register_device(hba);
read_unlock(&bnx2i_dev_lock);
}
/**
* bnx2i_unreg_one_device - unregister adapter instance with the cnic driver
* @hba: Adapter instance to unregister
*
* registers bnx2i adapter instance with the cnic driver while holding
* the adapter structure lock
*/
static void bnx2i_unreg_one_device(struct bnx2i_hba *hba)
{
if (hba->ofld_conns_active ||
!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) ||
test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state))
return;
hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
spin_lock(&hba->lock);
bnx2i_reg_device--;
spin_unlock(&hba->lock);
/* ep_disconnect could come before NETDEV_DOWN, driver won't
* see NETDEV_DOWN as it already unregistered itself.
*/
hba->adapter_state = 0;
clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
}
/**
* bnx2i_unreg_dev_all - unregisters all bnx2i instances with the cnic driver
*
* unregisters all bnx2i adapter instances with the cnic driver while holding
* the global resource lock
*/
void bnx2i_unreg_dev_all(void)
{
struct bnx2i_hba *hba, *temp;
read_lock(&bnx2i_dev_lock);
list_for_each_entry_safe(hba, temp, &adapter_list, link)
bnx2i_unreg_one_device(hba);
read_unlock(&bnx2i_dev_lock);
}
/**
* bnx2i_init_one - initialize an adapter instance and allocate memory resources
* @hba: bnx2i adapter instance
* @cnic: cnic device handle
*
* Global resource lock and host adapter lock is held during critical sections
* below. This routine is called from cnic_register_driver() context and
* work horse thread which does majority of device specific initialization
*/
static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
{
int rc;
read_lock(&bnx2i_dev_lock);
if (bnx2i_reg_device &&
!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
if (rc) /* duplicate registration */
printk(KERN_ERR "bnx2i- dev reg failed\n");
spin_lock(&hba->lock);
bnx2i_reg_device++;
hba->age++;
spin_unlock(&hba->lock);
set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
}
read_unlock(&bnx2i_dev_lock);
write_lock(&bnx2i_dev_lock);
list_add_tail(&hba->link, &adapter_list);
adapter_count++;
write_unlock(&bnx2i_dev_lock);
return 0;
}
/**
* bnx2i_ulp_init - initialize an adapter instance
* @dev: cnic device handle
*
* Called from cnic_register_driver() context to initialize all enumerated
* cnic devices. This routine allocate adapter structure and other
* device specific resources.
*/
void bnx2i_ulp_init(struct cnic_dev *dev)
{
struct bnx2i_hba *hba;
/* Allocate a HBA structure for this device */
hba = bnx2i_alloc_hba(dev);
if (!hba) {
printk(KERN_ERR "bnx2i init: hba initialization failed\n");
return;
}
/* Get PCI related information and update hba struct members */
clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
if (bnx2i_init_one(hba, dev)) {
printk(KERN_ERR "bnx2i - hba %p init failed\n", hba);
bnx2i_free_hba(hba);
} else
hba->cnic = dev;
}
/**
* bnx2i_ulp_exit - shuts down adapter instance and frees all resources
* @dev: cnic device handle
*
*/
void bnx2i_ulp_exit(struct cnic_dev *dev)
{
struct bnx2i_hba *hba;
hba = bnx2i_find_hba_for_cnic(dev);
if (!hba) {
printk(KERN_INFO "bnx2i_ulp_exit: hba not "
"found, dev 0x%p\n", dev);
return;
}
write_lock(&bnx2i_dev_lock);
list_del_init(&hba->link);
adapter_count--;
if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
spin_lock(&hba->lock);
bnx2i_reg_device--;
spin_unlock(&hba->lock);
}
write_unlock(&bnx2i_dev_lock);
bnx2i_free_hba(hba);
}
/**
* bnx2i_mod_init - module init entry point
*
* initialize any driver wide global data structures such as endpoint pool,
* tcp port manager/queue, sysfs. finally driver will register itself
* with the cnic module
*/
static int __init bnx2i_mod_init(void)
{
int err;
printk(KERN_INFO "%s", version);
if (!is_power_of_2(sq_size))
sq_size = roundup_pow_of_two(sq_size);
bnx2i_scsi_xport_template =
iscsi_register_transport(&bnx2i_iscsi_transport);
if (!bnx2i_scsi_xport_template) {
printk(KERN_ERR "Could not register bnx2i transport.\n");
err = -ENOMEM;
goto out;
}
err = cnic_register_driver(CNIC_ULP_ISCSI, &bnx2i_cnic_cb);
if (err) {
printk(KERN_ERR "Could not register bnx2i cnic driver.\n");
goto unreg_xport;
}
return 0;
unreg_xport:
iscsi_unregister_transport(&bnx2i_iscsi_transport);
out:
return err;
}
/**
* bnx2i_mod_exit - module cleanup/exit entry point
*
* Global resource lock and host adapter lock is held during critical sections
* in this function. Driver will browse through the adapter list, cleans-up
* each instance, unregisters iscsi transport name and finally driver will
* unregister itself with the cnic module
*/
static void __exit bnx2i_mod_exit(void)
{
struct bnx2i_hba *hba;
write_lock(&bnx2i_dev_lock);
while (!list_empty(&adapter_list)) {
hba = list_entry(adapter_list.next, struct bnx2i_hba, link);
list_del(&hba->link);
adapter_count--;
if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
bnx2i_reg_device--;
}
write_unlock(&bnx2i_dev_lock);
bnx2i_free_hba(hba);
write_lock(&bnx2i_dev_lock);
}
write_unlock(&bnx2i_dev_lock);
iscsi_unregister_transport(&bnx2i_iscsi_transport);
cnic_unregister_driver(CNIC_ULP_ISCSI);
}
module_init(bnx2i_mod_init);
module_exit(bnx2i_mod_exit);

2064
drivers/scsi/bnx2i/bnx2i_iscsi.c Normal file
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File diff suppressed because it is too large Load Diff

142
drivers/scsi/bnx2i/bnx2i_sysfs.c Normal file
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@ -0,0 +1,142 @@
/* bnx2i_sysfs.c: Broadcom NetXtreme II iSCSI driver.
*
* Copyright (c) 2004 - 2009 Broadcom 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)
*/
#include "bnx2i.h"
/**
* bnx2i_dev_to_hba - maps dev pointer to adapter struct
* @dev: device pointer
*
* Map device to hba structure
*/
static inline struct bnx2i_hba *bnx2i_dev_to_hba(struct device *dev)
{
struct Scsi_Host *shost = class_to_shost(dev);
return iscsi_host_priv(shost);
}
/**
* bnx2i_show_sq_info - return(s currently configured send queue (SQ) size
* @dev: device pointer
* @buf: buffer to return current SQ size parameter
*
* Returns current SQ size parameter, this paramater determines the number
* outstanding iSCSI commands supported on a connection
*/
static ssize_t bnx2i_show_sq_info(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev);
return sprintf(buf, "0x%x\n", hba->max_sqes);
}
/**
* bnx2i_set_sq_info - update send queue (SQ) size parameter
* @dev: device pointer
* @buf: buffer to return current SQ size parameter
* @count: parameter buffer size
*
* Interface for user to change shared queue size allocated for each conn
* Must be within SQ limits and a power of 2. For the latter this is needed
* because of how libiscsi preallocates tasks.
*/
static ssize_t bnx2i_set_sq_info(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev);
u32 val;
int max_sq_size;
if (hba->ofld_conns_active)
goto skip_config;
if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
max_sq_size = BNX2I_5770X_SQ_WQES_MAX;
else
max_sq_size = BNX2I_570X_SQ_WQES_MAX;
if (sscanf(buf, " 0x%x ", &val) > 0) {
if ((val >= BNX2I_SQ_WQES_MIN) && (val <= max_sq_size) &&
(is_power_of_2(val)))
hba->max_sqes = val;
}
return count;
skip_config:
printk(KERN_ERR "bnx2i: device busy, cannot change SQ size\n");
return 0;
}
/**
* bnx2i_show_ccell_info - returns command cell (HQ) size
* @dev: device pointer
* @buf: buffer to return current SQ size parameter
*
* returns per-connection TCP history queue size parameter
*/
static ssize_t bnx2i_show_ccell_info(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev);
return sprintf(buf, "0x%x\n", hba->num_ccell);
}
/**
* bnx2i_get_link_state - set command cell (HQ) size
* @dev: device pointer
* @buf: buffer to return current SQ size parameter
* @count: parameter buffer size
*
* updates per-connection TCP history queue size parameter
*/
static ssize_t bnx2i_set_ccell_info(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
u32 val;
struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev);
if (hba->ofld_conns_active)
goto skip_config;
if (sscanf(buf, " 0x%x ", &val) > 0) {
if ((val >= BNX2I_CCELLS_MIN) &&
(val <= BNX2I_CCELLS_MAX)) {
hba->num_ccell = val;
}
}
return count;
skip_config:
printk(KERN_ERR "bnx2i: device busy, cannot change CCELL size\n");
return 0;
}
static DEVICE_ATTR(sq_size, S_IRUGO | S_IWUSR,
bnx2i_show_sq_info, bnx2i_set_sq_info);
static DEVICE_ATTR(num_ccell, S_IRUGO | S_IWUSR,
bnx2i_show_ccell_info, bnx2i_set_ccell_info);
struct device_attribute *bnx2i_dev_attributes[] = {
&dev_attr_sq_size,
&dev_attr_num_ccell,
NULL
};