[SCSI] Initial Commit of qla4xxx

open-iSCSI driver for Qlogic Corporation's iSCSI HBAs

Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Signed-off-by: David Somayajulu <david.somayajulu@qlogic.com>
Signed-off-by: Doug Maxey <dwm@bubba.enoyolf.org>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 586 insertions, 0 deletions

diff --git a/drivers/scsi/qla4xxx/ql4_def.h b/drivers/scsi/qla4xxx/ql4_def.h
new file mode 100644
index 00000000000..a7f6c7b1c59
--- /dev/null
+++ b/drivers/scsi/qla4xxx/ql4_def.h
@@ -0,0 +1,586 @@
+/*
+ * QLogic iSCSI HBA Driver
+ * Copyright (c)  2003-2006 QLogic Corporation
+ *
+ * See LICENSE.qla4xxx for copyright and licensing details.
+ */
+
+#ifndef __QL4_DEF_H
+#define __QL4_DEF_H
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/dmapool.h>
+#include <linux/mempool.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+
+#include <net/tcp.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_iscsi.h>
+
+
+#ifndef PCI_DEVICE_ID_QLOGIC_ISP4010
+#define PCI_DEVICE_ID_QLOGIC_ISP4010	0x4010
+#endif
+
+#ifndef PCI_DEVICE_ID_QLOGIC_ISP4022
+#define PCI_DEVICE_ID_QLOGIC_ISP4022	0x4022
+#endif				/*  */
+
+#define QLA_SUCCESS			0
+#define QLA_ERROR			1
+
+/*
+ * Data bit definitions
+ */
+#define BIT_0	0x1
+#define BIT_1	0x2
+#define BIT_2	0x4
+#define BIT_3	0x8
+#define BIT_4	0x10
+#define BIT_5	0x20
+#define BIT_6	0x40
+#define BIT_7	0x80
+#define BIT_8	0x100
+#define BIT_9	0x200
+#define BIT_10	0x400
+#define BIT_11	0x800
+#define BIT_12	0x1000
+#define BIT_13	0x2000
+#define BIT_14	0x4000
+#define BIT_15	0x8000
+#define BIT_16	0x10000
+#define BIT_17	0x20000
+#define BIT_18	0x40000
+#define BIT_19	0x80000
+#define BIT_20	0x100000
+#define BIT_21	0x200000
+#define BIT_22	0x400000
+#define BIT_23	0x800000
+#define BIT_24	0x1000000
+#define BIT_25	0x2000000
+#define BIT_26	0x4000000
+#define BIT_27	0x8000000
+#define BIT_28	0x10000000
+#define BIT_29	0x20000000
+#define BIT_30	0x40000000
+#define BIT_31	0x80000000
+
+/*
+ * Host adapter default definitions
+ ***********************************/
+#define MAX_HBAS		16
+#define MAX_BUSES		1
+#define MAX_TARGETS		(MAX_PRST_DEV_DB_ENTRIES +  MAX_DEV_DB_ENTRIES)
+#define MAX_LUNS		0xffff
+#define MAX_AEN_ENTRIES		256 /* should be > EXT_DEF_MAX_AEN_QUEUE */
+#define MAX_DDB_ENTRIES		(MAX_PRST_DEV_DB_ENTRIES + MAX_DEV_DB_ENTRIES)
+#define MAX_PDU_ENTRIES		32
+#define INVALID_ENTRY		0xFFFF
+#define MAX_CMDS_TO_RISC	1024
+#define MAX_SRBS		MAX_CMDS_TO_RISC
+#define MBOX_AEN_REG_COUNT	5
+#define MAX_INIT_RETRIES	5
+#define IOCB_HIWAT_CUSHION	16
+
+/*
+ * Buffer sizes
+ */
+#define REQUEST_QUEUE_DEPTH		MAX_CMDS_TO_RISC
+#define RESPONSE_QUEUE_DEPTH		64
+#define QUEUE_SIZE			64
+#define DMA_BUFFER_SIZE			512
+
+/*
+ * Misc
+ */
+#define MAC_ADDR_LEN			6	/* in bytes */
+#define IP_ADDR_LEN			4	/* in bytes */
+#define DRIVER_NAME			"qla4xxx"
+
+#define MAX_LINKED_CMDS_PER_LUN		3
+#define MAX_REQS_SERVICED_PER_INTR	16
+
+#define ISCSI_IPADDR_SIZE		4	/* IP address size */
+#define ISCSI_ALIAS_SIZE		32	/* ISCSI Alais name size */
+#define ISCSI_NAME_SIZE			255	/* ISCSI Name size -
+						 * usually a string */
+
+#define LSDW(x) ((u32)((u64)(x)))
+#define MSDW(x) ((u32)((((u64)(x)) >> 16) >> 16))
+
+/*
+ * Retry & Timeout Values
+ */
+#define MBOX_TOV			60
+#define SOFT_RESET_TOV			30
+#define RESET_INTR_TOV			3
+#define SEMAPHORE_TOV			10
+#define ADAPTER_INIT_TOV		120
+#define ADAPTER_RESET_TOV		180
+#define EXTEND_CMD_TOV			60
+#define WAIT_CMD_TOV			30
+#define EH_WAIT_CMD_TOV			120
+#define FIRMWARE_UP_TOV			60
+#define RESET_FIRMWARE_TOV		30
+#define LOGOUT_TOV			10
+#define IOCB_TOV_MARGIN			10
+#define RELOGIN_TOV			18
+#define ISNS_DEREG_TOV			5
+
+#define MAX_RESET_HA_RETRIES		2
+
+/*
+ * SCSI Request Block structure	 (srb)	that is placed
+ * on cmd->SCp location of every I/O	 [We have 22 bytes available]
+ */
+struct srb {
+	struct list_head list;	/* (8)	 */
+	struct scsi_qla_host *ha;	/* HA the SP is queued on */
+	struct ddb_entry	*ddb;
+	uint16_t flags;		/* (1) Status flags. */
+
+#define SRB_DMA_VALID		BIT_3	/* DMA Buffer mapped. */
+#define SRB_GOT_SENSE		BIT_4	/* sense data recieved. */
+	uint8_t state;		/* (1) Status flags. */
+
+#define SRB_NO_QUEUE_STATE	 0	/* Request is in between states */
+#define SRB_FREE_STATE		 1
+#define SRB_ACTIVE_STATE	 3
+#define SRB_ACTIVE_TIMEOUT_STATE 4
+#define SRB_SUSPENDED_STATE	 7	/* Request in suspended state */
+
+	struct scsi_cmnd *cmd;	/* (4) SCSI command block */
+	dma_addr_t dma_handle;	/* (4) for unmap of single transfers */
+	atomic_t ref_count;	/* reference count for this srb */
+	uint32_t fw_ddb_index;
+	uint8_t err_id;		/* error id */
+#define SRB_ERR_PORT	   1	/* Request failed because "port down" */
+#define SRB_ERR_LOOP	   2	/* Request failed because "loop down" */
+#define SRB_ERR_DEVICE	   3	/* Request failed because "device error" */
+#define SRB_ERR_OTHER	   4
+
+	uint16_t reserved;
+	uint16_t iocb_tov;
+	uint16_t iocb_cnt;	/* Number of used iocbs */
+	uint16_t cc_stat;
+	u_long r_start;		/* Time we recieve a cmd from OS */
+	u_long u_start;		/* Time when we handed the cmd to F/W */
+};
+
+	/*
+	 * Device Database (DDB) structure
+	 */
+struct ddb_entry {
+	struct list_head list;	/* ddb list */
+	struct scsi_qla_host *ha;
+	struct iscsi_cls_session *sess;
+	struct iscsi_cls_conn *conn;
+
+	atomic_t state;		/* DDB State */
+
+	unsigned long flags;	/* DDB Flags */
+
+	unsigned long dev_scan_wait_to_start_relogin;
+	unsigned long dev_scan_wait_to_complete_relogin;
+
+	uint16_t os_target_id;	/* Target ID */
+	uint16_t fw_ddb_index;	/* DDB firmware index */
+	uint8_t reserved[2];
+	uint32_t fw_ddb_device_state; /* F/W Device State  -- see ql4_fw.h */
+
+	uint32_t CmdSn;
+	uint16_t target_session_id;
+	uint16_t connection_id;
+	uint16_t exe_throttle;	/* Max mumber of cmds outstanding
+				 * simultaneously */
+	uint16_t task_mgmt_timeout; /* Min time for task mgmt cmds to
+				     * complete */
+	uint16_t default_relogin_timeout; /*  Max time to wait for
+					   *  relogin to complete */
+	uint16_t tcp_source_port_num;
+	uint32_t default_time2wait; /* Default Min time between
+				     * relogins (+aens) */
+
+	atomic_t port_down_timer; /* Device connection timer */
+	atomic_t retry_relogin_timer; /* Min Time between relogins
+				       * (4000 only) */
+	atomic_t relogin_timer;	/* Max Time to wait for relogin to complete */
+	atomic_t relogin_retry_count; /* Num of times relogin has been
+				       * retried */
+
+	uint16_t port;
+	uint32_t tpgt;
+	uint8_t ip_addr[ISCSI_IPADDR_SIZE];
+	uint8_t iscsi_name[ISCSI_NAME_SIZE];	/* 72 x48 */
+	uint8_t iscsi_alias[0x20];
+};
+
+/*
+ * DDB states.
+ */
+#define DDB_STATE_DEAD		0	/* We can no longer talk to
+					 * this device */
+#define DDB_STATE_ONLINE	1	/* Device ready to accept
+					 * commands */
+#define DDB_STATE_MISSING	2	/* Device logged off, trying
+					 * to re-login */
+
+/*
+ * DDB flags.
+ */
+#define DF_RELOGIN		0	/* Relogin to device */
+#define DF_NO_RELOGIN		1	/* Do not relogin if IOCTL
+					 * logged it out */
+#define DF_ISNS_DISCOVERED	2	/* Device was discovered via iSNS */
+#define DF_FO_MASKED		3
+
+/*
+ * Asynchronous Event Queue structure
+ */
+struct aen {
+	uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
+};
+
+
+#include "ql4_fw.h"
+#include "ql4_nvram.h"
+
+/*
+ * Linux Host Adapter structure
+ */
+struct scsi_qla_host {
+	/* Linux adapter configuration data */
+	struct Scsi_Host *host; /* pointer to host data */
+	uint32_t tot_ddbs;
+	unsigned long flags;
+
+#define AF_ONLINE		      0 /* 0x00000001 */
+#define AF_INIT_DONE		      1 /* 0x00000002 */
+#define AF_MBOX_COMMAND		      2 /* 0x00000004 */
+#define AF_MBOX_COMMAND_DONE	      3 /* 0x00000008 */
+#define AF_INTERRUPTS_ON	      6 /* 0x00000040 Not Used */
+#define AF_GET_CRASH_RECORD	      7 /* 0x00000080 */
+#define AF_LINK_UP		      8 /* 0x00000100 */
+#define AF_TOPCAT_CHIP_PRESENT	      9 /* 0x00000200 */
+#define AF_IRQ_ATTACHED		     10 /* 0x00000400 */
+#define AF_ISNS_CMD_IN_PROCESS	     12 /* 0x00001000 */
+#define AF_ISNS_CMD_DONE	     13 /* 0x00002000 */
+
+	unsigned long dpc_flags;
+
+#define DPC_RESET_HA		      1 /* 0x00000002 */
+#define DPC_RETRY_RESET_HA	      2 /* 0x00000004 */
+#define DPC_RELOGIN_DEVICE	      3 /* 0x00000008 */
+#define DPC_RESET_HA_DESTROY_DDB_LIST 4 /* 0x00000010 */
+#define DPC_RESET_HA_INTR	      5 /* 0x00000020 */
+#define DPC_ISNS_RESTART	      7 /* 0x00000080 */
+#define DPC_AEN			      9 /* 0x00000200 */
+#define DPC_GET_DHCP_IP_ADDR	     15 /* 0x00008000 */
+
+	uint16_t	iocb_cnt;
+	uint16_t	iocb_hiwat;
+
+	/* SRB cache. */
+#define SRB_MIN_REQ	128
+	mempool_t *srb_mempool;
+
+	/* pci information */
+	struct pci_dev *pdev;
+
+	struct isp_reg __iomem *reg; /* Base I/O address */
+	unsigned long pio_address;
+	unsigned long pio_length;
+#define MIN_IOBASE_LEN		0x100
+
+	uint16_t req_q_count;
+	uint8_t marker_needed;
+	uint8_t rsvd1;
+
+	unsigned long host_no;
+
+	/* NVRAM registers */
+	struct eeprom_data *nvram;
+	spinlock_t hardware_lock ____cacheline_aligned;
+	spinlock_t list_lock;
+	uint32_t   eeprom_cmd_data;
+
+	/* Counters for general statistics */
+	uint64_t adapter_error_count;
+	uint64_t device_error_count;
+	uint64_t total_io_count;
+	uint64_t total_mbytes_xferred;
+	uint64_t link_failure_count;
+	uint64_t invalid_crc_count;
+	uint32_t spurious_int_count;
+	uint32_t aborted_io_count;
+	uint32_t io_timeout_count;
+	uint32_t mailbox_timeout_count;
+	uint32_t seconds_since_last_intr;
+	uint32_t seconds_since_last_heartbeat;
+	uint32_t mac_index;
+
+	/* Info Needed for Management App */
+	/* --- From GetFwVersion --- */
+	uint32_t firmware_version[2];
+	uint32_t patch_number;
+	uint32_t build_number;
+
+	/* --- From Init_FW --- */
+	/* init_cb_t *init_cb; */
+	uint16_t firmware_options;
+	uint16_t tcp_options;
+	uint8_t ip_address[IP_ADDR_LEN];
+	uint8_t subnet_mask[IP_ADDR_LEN];
+	uint8_t gateway[IP_ADDR_LEN];
+	uint8_t alias[32];
+	uint8_t name_string[256];
+	uint8_t heartbeat_interval;
+	uint8_t rsvd;
+
+	/* --- From FlashSysInfo --- */
+	uint8_t my_mac[MAC_ADDR_LEN];
+	uint8_t serial_number[16];
+
+	/* --- From GetFwState --- */
+	uint32_t firmware_state;
+	uint32_t board_id;
+	uint32_t addl_fw_state;
+
+	/* Linux kernel thread */
+	struct workqueue_struct *dpc_thread;
+	struct work_struct dpc_work;
+
+	/* Linux timer thread */
+	struct timer_list timer;
+	uint32_t timer_active;
+
+	/* Recovery Timers */
+	uint32_t port_down_retry_count;
+	uint32_t discovery_wait;
+	atomic_t check_relogin_timeouts;
+	uint32_t retry_reset_ha_cnt;
+	uint32_t isp_reset_timer;	/* reset test timer */
+	uint32_t nic_reset_timer;	/* simulated nic reset test timer */
+	int eh_start;
+	struct list_head free_srb_q;
+	uint16_t free_srb_q_count;
+	uint16_t num_srbs_allocated;
+
+	/* DMA Memory Block */
+	void *queues;
+	dma_addr_t queues_dma;
+	unsigned long queues_len;
+
+#define MEM_ALIGN_VALUE \
+	    ((max(REQUEST_QUEUE_DEPTH, RESPONSE_QUEUE_DEPTH)) * \
+	     sizeof(struct queue_entry))
+	/* request and response queue variables */
+	dma_addr_t request_dma;
+	struct queue_entry *request_ring;
+	struct queue_entry *request_ptr;
+	dma_addr_t response_dma;
+	struct queue_entry *response_ring;
+	struct queue_entry *response_ptr;
+	dma_addr_t shadow_regs_dma;
+	struct shadow_regs *shadow_regs;
+	uint16_t request_in;	/* Current indexes. */
+	uint16_t request_out;
+	uint16_t response_in;
+	uint16_t response_out;
+
+	/* aen queue variables */
+	uint16_t aen_q_count;	/* Number of available aen_q entries */
+	uint16_t aen_in;	/* Current indexes */
+	uint16_t aen_out;
+	struct aen aen_q[MAX_AEN_ENTRIES];
+
+	/* This mutex protects several threads to do mailbox commands
+	 * concurrently.
+	 */
+	struct mutex  mbox_sem;
+	wait_queue_head_t mailbox_wait_queue;
+
+	/* temporary mailbox status registers */
+	volatile uint8_t mbox_status_count;
+	volatile uint32_t mbox_status[MBOX_REG_COUNT];
+
+	/* local device database list (contains internal ddb entries) */
+	struct list_head ddb_list;
+
+	/* Map ddb_list entry by FW ddb index */
+	struct ddb_entry *fw_ddb_index_map[MAX_DDB_ENTRIES];
+
+};
+
+static inline int is_qla4010(struct scsi_qla_host *ha)
+{
+	return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4010;
+}
+
+static inline int is_qla4022(struct scsi_qla_host *ha)
+{
+	return ha->pdev->device == PCI_DEVICE_ID_QLOGIC_ISP4022;
+}
+
+static inline int adapter_up(struct scsi_qla_host *ha)
+{
+	return (test_bit(AF_ONLINE, &ha->flags) != 0) &&
+		(test_bit(AF_LINK_UP, &ha->flags) != 0);
+}
+
+static inline struct scsi_qla_host* to_qla_host(struct Scsi_Host *shost)
+{
+	return (struct scsi_qla_host *)shost->hostdata;
+}
+
+static inline void __iomem* isp_semaphore(struct scsi_qla_host *ha)
+{
+	return (is_qla4022(ha) ?
+		&ha->reg->u1.isp4022.semaphore :
+		&ha->reg->u1.isp4010.nvram);
+}
+
+static inline void __iomem* isp_nvram(struct scsi_qla_host *ha)
+{
+	return (is_qla4022(ha) ?
+		&ha->reg->u1.isp4022.nvram :
+		&ha->reg->u1.isp4010.nvram);
+}
+
+static inline void __iomem* isp_ext_hw_conf(struct scsi_qla_host *ha)
+{
+	return (is_qla4022(ha) ?
+		&ha->reg->u2.isp4022.p0.ext_hw_conf :
+		&ha->reg->u2.isp4010.ext_hw_conf);
+}
+
+static inline void __iomem* isp_port_status(struct scsi_qla_host *ha)
+{
+	return (is_qla4022(ha) ?
+		&ha->reg->u2.isp4022.p0.port_status :
+		&ha->reg->u2.isp4010.port_status);
+}
+
+static inline void __iomem* isp_port_ctrl(struct scsi_qla_host *ha)
+{
+	return (is_qla4022(ha) ?
+		&ha->reg->u2.isp4022.p0.port_ctrl :
+		&ha->reg->u2.isp4010.port_ctrl);
+}
+
+static inline void __iomem* isp_port_error_status(struct scsi_qla_host *ha)
+{
+	return (is_qla4022(ha) ?
+		&ha->reg->u2.isp4022.p0.port_err_status :
+		&ha->reg->u2.isp4010.port_err_status);
+}
+
+static inline void __iomem * isp_gp_out(struct scsi_qla_host *ha)
+{
+	return (is_qla4022(ha) ?
+		&ha->reg->u2.isp4022.p0.gp_out :
+		&ha->reg->u2.isp4010.gp_out);
+}
+
+static inline int eeprom_ext_hw_conf_offset(struct scsi_qla_host *ha)
+{
+	return (is_qla4022(ha) ?
+		offsetof(struct eeprom_data, isp4022.ext_hw_conf) / 2 :
+		offsetof(struct eeprom_data, isp4010.ext_hw_conf) / 2);
+}
+
+int ql4xxx_sem_spinlock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits);
+void ql4xxx_sem_unlock(struct scsi_qla_host * ha, u32 sem_mask);
+int ql4xxx_sem_lock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits);
+
+static inline int ql4xxx_lock_flash(struct scsi_qla_host *a)
+{
+	if (is_qla4022(a))
+		return ql4xxx_sem_spinlock(a, QL4022_FLASH_SEM_MASK,
+					   (QL4022_RESOURCE_BITS_BASE_CODE |
+					    (a->mac_index)) << 13);
+	else
+		return ql4xxx_sem_spinlock(a, QL4010_FLASH_SEM_MASK,
+					   QL4010_FLASH_SEM_BITS);
+}
+
+static inline void ql4xxx_unlock_flash(struct scsi_qla_host *a)
+{
+	if (is_qla4022(a))
+		ql4xxx_sem_unlock(a, QL4022_FLASH_SEM_MASK);
+	else
+		ql4xxx_sem_unlock(a, QL4010_FLASH_SEM_MASK);
+}
+
+static inline int ql4xxx_lock_nvram(struct scsi_qla_host *a)
+{
+	if (is_qla4022(a))
+		return ql4xxx_sem_spinlock(a, QL4022_NVRAM_SEM_MASK,
+					   (QL4022_RESOURCE_BITS_BASE_CODE |
+					    (a->mac_index)) << 10);
+	else
+		return ql4xxx_sem_spinlock(a, QL4010_NVRAM_SEM_MASK,
+					   QL4010_NVRAM_SEM_BITS);
+}
+
+static inline void ql4xxx_unlock_nvram(struct scsi_qla_host *a)
+{
+	if (is_qla4022(a))
+		ql4xxx_sem_unlock(a, QL4022_NVRAM_SEM_MASK);
+	else
+		ql4xxx_sem_unlock(a, QL4010_NVRAM_SEM_MASK);
+}
+
+static inline int ql4xxx_lock_drvr(struct scsi_qla_host *a)
+{
+	if (is_qla4022(a))
+		return ql4xxx_sem_lock(a, QL4022_DRVR_SEM_MASK,
+				       (QL4022_RESOURCE_BITS_BASE_CODE |
+					(a->mac_index)) << 1);
+	else
+		return ql4xxx_sem_lock(a, QL4010_DRVR_SEM_MASK,
+				       QL4010_DRVR_SEM_BITS);
+}
+
+static inline void ql4xxx_unlock_drvr(struct scsi_qla_host *a)
+{
+	if (is_qla4022(a))
+		ql4xxx_sem_unlock(a, QL4022_DRVR_SEM_MASK);
+	else
+		ql4xxx_sem_unlock(a, QL4010_DRVR_SEM_MASK);
+}
+
+/*---------------------------------------------------------------------------*/
+
+/* Defines for qla4xxx_initialize_adapter() and qla4xxx_recover_adapter() */
+#define PRESERVE_DDB_LIST	0
+#define REBUILD_DDB_LIST	1
+
+/* Defines for process_aen() */
+#define PROCESS_ALL_AENS	 0
+#define FLUSH_DDB_CHANGED_AENS	 1
+#define RELOGIN_DDB_CHANGED_AENS 2
+
+#include "ql4_version.h"
+#include "ql4_glbl.h"
+#include "ql4_dbg.h"
+#include "ql4_inline.h"
+
+
+#endif	/*_QLA4XXX_H */