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b6bd2fb92a
Move the code for tracking FSF requests to new file to have this code in one place. The functions for adding and removing requests on the I/O path are already inline. The alloc and free functions are only called once, so it does not hurt to inline them and add them to the same file. Reviewed-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
351 lines
12 KiB
C
351 lines
12 KiB
C
/*
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* zfcp device driver
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*
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* Global definitions for the zfcp device driver.
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*
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* Copyright IBM Corporation 2002, 2009
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*/
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#ifndef ZFCP_DEF_H
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#define ZFCP_DEF_H
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/*************************** INCLUDES *****************************************/
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#include <linux/init.h>
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#include <linux/moduleparam.h>
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#include <linux/major.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <linux/mempool.h>
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#include <linux/syscalls.h>
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#include <linux/scatterlist.h>
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#include <linux/ioctl.h>
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#include <scsi/fc/fc_fs.h>
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#include <scsi/fc/fc_gs.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_fc.h>
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#include <scsi/scsi_bsg_fc.h>
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#include <asm/ccwdev.h>
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#include <asm/qdio.h>
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#include <asm/debug.h>
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#include <asm/ebcdic.h>
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#include <asm/sysinfo.h>
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#include "zfcp_fsf.h"
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struct zfcp_reqlist;
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/********************* SCSI SPECIFIC DEFINES *********************************/
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#define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
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/********************* CIO/QDIO SPECIFIC DEFINES *****************************/
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/* DMQ bug workaround: don't use last SBALE */
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#define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
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/* index of last SBALE (with respect to DMQ bug workaround) */
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#define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
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/* max. number of (data buffer) SBALEs in largest SBAL chain */
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#define ZFCP_MAX_SBALES_PER_REQ \
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(FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
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/* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
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#define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
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/* max. number of (data buffer) SBALEs in largest SBAL chain
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multiplied with number of sectors per 4k block */
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/********************* FSF SPECIFIC DEFINES *********************************/
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/* ATTENTION: value must not be used by hardware */
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#define FSF_QTCB_UNSOLICITED_STATUS 0x6305
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/* timeout value for "default timer" for fsf requests */
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#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
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/*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
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/*
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* Note, the leftmost status byte is common among adapter, port
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* and unit
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*/
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#define ZFCP_COMMON_FLAGS 0xfff00000
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/* common status bits */
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#define ZFCP_STATUS_COMMON_RUNNING 0x40000000
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#define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
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#define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
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#define ZFCP_STATUS_COMMON_OPEN 0x04000000
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#define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
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#define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
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#define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
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#define ZFCP_STATUS_COMMON_NOESC 0x00200000
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/* adapter status */
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#define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
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#define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
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#define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
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#define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
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#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
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/* remote port status */
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#define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
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#define ZFCP_STATUS_PORT_LINK_TEST 0x00000002
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/* logical unit status */
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#define ZFCP_STATUS_UNIT_SHARED 0x00000004
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#define ZFCP_STATUS_UNIT_READONLY 0x00000008
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/* FSF request status (this does not have a common part) */
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#define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
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#define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
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#define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
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#define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
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#define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
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#define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
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#define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
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/************************* STRUCTURE DEFINITIONS *****************************/
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struct zfcp_fsf_req;
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/* holds various memory pools of an adapter */
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struct zfcp_adapter_mempool {
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mempool_t *erp_req;
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mempool_t *gid_pn_req;
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mempool_t *scsi_req;
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mempool_t *scsi_abort;
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mempool_t *status_read_req;
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mempool_t *status_read_data;
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mempool_t *gid_pn;
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mempool_t *qtcb_pool;
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};
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struct zfcp_qdio_queue {
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struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];
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u8 first; /* index of next free bfr in queue */
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atomic_t count; /* number of free buffers in queue */
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};
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struct zfcp_erp_action {
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struct list_head list;
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int action; /* requested action code */
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struct zfcp_adapter *adapter; /* device which should be recovered */
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struct zfcp_port *port;
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struct zfcp_unit *unit;
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u32 status; /* recovery status */
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u32 step; /* active step of this erp action */
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unsigned long fsf_req_id;
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struct timer_list timer;
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};
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struct fsf_latency_record {
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u32 min;
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u32 max;
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u64 sum;
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};
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struct latency_cont {
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struct fsf_latency_record channel;
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struct fsf_latency_record fabric;
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u64 counter;
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};
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struct zfcp_latencies {
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struct latency_cont read;
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struct latency_cont write;
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struct latency_cont cmd;
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spinlock_t lock;
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};
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/** struct zfcp_qdio - basic QDIO data structure
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* @resp_q: response queue
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* @req_q: request queue
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* @stat_lock: lock to protect req_q_util and req_q_time
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* @req_q_lock; lock to serialize access to request queue
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* @req_q_time: time of last fill level change
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* @req_q_util: used for accounting
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* @req_q_full: queue full incidents
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* @req_q_wq: used to wait for SBAL availability
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* @adapter: adapter used in conjunction with this QDIO structure
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*/
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struct zfcp_qdio {
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struct zfcp_qdio_queue resp_q;
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struct zfcp_qdio_queue req_q;
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spinlock_t stat_lock;
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spinlock_t req_q_lock;
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unsigned long long req_q_time;
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u64 req_q_util;
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atomic_t req_q_full;
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wait_queue_head_t req_q_wq;
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struct zfcp_adapter *adapter;
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};
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struct zfcp_adapter {
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struct kref ref;
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u64 peer_wwnn; /* P2P peer WWNN */
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u64 peer_wwpn; /* P2P peer WWPN */
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u32 peer_d_id; /* P2P peer D_ID */
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struct ccw_device *ccw_device; /* S/390 ccw device */
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struct zfcp_qdio *qdio;
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u32 hydra_version; /* Hydra version */
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u32 fsf_lic_version;
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u32 adapter_features; /* FCP channel features */
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u32 connection_features; /* host connection features */
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u32 hardware_version; /* of FCP channel */
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u16 timer_ticks; /* time int for a tick */
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struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
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struct list_head port_list; /* remote port list */
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rwlock_t port_list_lock; /* port list lock */
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unsigned long req_no; /* unique FSF req number */
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struct zfcp_reqlist *req_list;
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u32 fsf_req_seq_no; /* FSF cmnd seq number */
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rwlock_t abort_lock; /* Protects against SCSI
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stack abort/command
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completion races */
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atomic_t stat_miss; /* # missing status reads*/
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struct work_struct stat_work;
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atomic_t status; /* status of this adapter */
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struct list_head erp_ready_head; /* error recovery for this
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adapter/devices */
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wait_queue_head_t erp_ready_wq;
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struct list_head erp_running_head;
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rwlock_t erp_lock;
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wait_queue_head_t erp_done_wqh;
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struct zfcp_erp_action erp_action; /* pending error recovery */
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atomic_t erp_counter;
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u32 erp_total_count; /* total nr of enqueued erp
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actions */
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u32 erp_low_mem_count; /* nr of erp actions waiting
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for memory */
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struct task_struct *erp_thread;
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struct zfcp_fc_wka_ports *gs; /* generic services */
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struct zfcp_dbf *dbf; /* debug traces */
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struct zfcp_adapter_mempool pool; /* Adapter memory pools */
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struct fc_host_statistics *fc_stats;
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struct fsf_qtcb_bottom_port *stats_reset_data;
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unsigned long stats_reset;
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struct work_struct scan_work;
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struct service_level service_level;
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struct workqueue_struct *work_queue;
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};
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struct zfcp_port {
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struct device sysfs_device; /* sysfs device */
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struct fc_rport *rport; /* rport of fc transport class */
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struct list_head list; /* list of remote ports */
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struct zfcp_adapter *adapter; /* adapter used to access port */
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struct list_head unit_list; /* head of logical unit list */
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rwlock_t unit_list_lock; /* unit list lock */
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atomic_t status; /* status of this remote port */
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u64 wwnn; /* WWNN if known */
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u64 wwpn; /* WWPN */
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u32 d_id; /* D_ID */
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u32 handle; /* handle assigned by FSF */
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struct zfcp_erp_action erp_action; /* pending error recovery */
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atomic_t erp_counter;
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u32 maxframe_size;
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u32 supported_classes;
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struct work_struct gid_pn_work;
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struct work_struct test_link_work;
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struct work_struct rport_work;
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enum { RPORT_NONE, RPORT_ADD, RPORT_DEL } rport_task;
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};
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struct zfcp_unit {
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struct device sysfs_device; /* sysfs device */
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struct list_head list; /* list of logical units */
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struct zfcp_port *port; /* remote port of unit */
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atomic_t status; /* status of this logical unit */
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u64 fcp_lun; /* own FCP_LUN */
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u32 handle; /* handle assigned by FSF */
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struct scsi_device *device; /* scsi device struct pointer */
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struct zfcp_erp_action erp_action; /* pending error recovery */
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atomic_t erp_counter;
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struct zfcp_latencies latencies;
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struct work_struct scsi_work;
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};
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/**
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* struct zfcp_queue_req - queue related values for a request
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* @sbal_number: number of free SBALs
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* @sbal_first: first SBAL for this request
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* @sbal_last: last SBAL for this request
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* @sbal_limit: last possible SBAL for this request
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* @sbale_curr: current SBALE at creation of this request
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* @sbal_response: SBAL used in interrupt
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* @qdio_outb_usage: usage of outbound queue
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* @qdio_inb_usage: usage of inbound queue
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*/
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struct zfcp_queue_req {
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u8 sbal_number;
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u8 sbal_first;
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u8 sbal_last;
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u8 sbal_limit;
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u8 sbale_curr;
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u8 sbal_response;
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u16 qdio_outb_usage;
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u16 qdio_inb_usage;
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};
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/**
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* struct zfcp_fsf_req - basic FSF request structure
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* @list: list of FSF requests
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* @req_id: unique request ID
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* @adapter: adapter this request belongs to
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* @queue_req: queue related values
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* @completion: used to signal the completion of the request
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* @status: status of the request
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* @fsf_command: FSF command issued
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* @qtcb: associated QTCB
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* @seq_no: sequence number of this request
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* @data: private data
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* @timer: timer data of this request
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* @erp_action: reference to erp action if request issued on behalf of ERP
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* @pool: reference to memory pool if used for this request
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* @issued: time when request was send (STCK)
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* @unit: reference to unit if this request is a SCSI request
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* @handler: handler which should be called to process response
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*/
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struct zfcp_fsf_req {
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struct list_head list;
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unsigned long req_id;
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struct zfcp_adapter *adapter;
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struct zfcp_queue_req queue_req;
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struct completion completion;
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u32 status;
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u32 fsf_command;
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struct fsf_qtcb *qtcb;
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u32 seq_no;
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void *data;
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struct timer_list timer;
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struct zfcp_erp_action *erp_action;
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mempool_t *pool;
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unsigned long long issued;
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struct zfcp_unit *unit;
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void (*handler)(struct zfcp_fsf_req *);
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};
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/* driver data */
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struct zfcp_data {
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struct scsi_host_template scsi_host_template;
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struct scsi_transport_template *scsi_transport_template;
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struct kmem_cache *gpn_ft_cache;
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struct kmem_cache *qtcb_cache;
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struct kmem_cache *sr_buffer_cache;
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struct kmem_cache *gid_pn_cache;
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struct kmem_cache *adisc_cache;
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};
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/********************** ZFCP SPECIFIC DEFINES ********************************/
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#define ZFCP_SET 0x00000100
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#define ZFCP_CLEAR 0x00000200
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#endif /* ZFCP_DEF_H */
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