Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 1 | /* |
Christof Schmitt | 553448f | 2008-06-10 18:20:58 +0200 | [diff] [blame] | 2 | * zfcp device driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Christof Schmitt | 553448f | 2008-06-10 18:20:58 +0200 | [diff] [blame] | 4 | * Interface to Linux SCSI midlayer. |
Swen Schillig | 41fa2ad | 2007-09-07 09:15:31 +0200 | [diff] [blame] | 5 | * |
Christof Schmitt | 615f59e | 2010-02-17 11:18:56 +0100 | [diff] [blame] | 6 | * Copyright IBM Corporation 2002, 2010 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Christof Schmitt | ecf39d4 | 2008-12-25 13:39:53 +0100 | [diff] [blame] | 9 | #define KMSG_COMPONENT "zfcp" |
| 10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 11 | |
Christof Schmitt | 4318e08 | 2009-11-24 16:54:08 +0100 | [diff] [blame] | 12 | #include <linux/types.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 13 | #include <linux/slab.h> |
Christof Schmitt | 4318e08 | 2009-11-24 16:54:08 +0100 | [diff] [blame] | 14 | #include <scsi/fc/fc_fcp.h> |
Christof Schmitt | 5f852be | 2007-05-08 11:16:52 +0200 | [diff] [blame] | 15 | #include <asm/atomic.h> |
Christof Schmitt | dcd20e2 | 2009-08-18 15:43:08 +0200 | [diff] [blame] | 16 | #include "zfcp_ext.h" |
| 17 | #include "zfcp_dbf.h" |
Christof Schmitt | 7c7dc19 | 2009-11-24 16:54:13 +0100 | [diff] [blame] | 18 | #include "zfcp_fc.h" |
Christof Schmitt | b6bd2fb | 2010-02-17 11:18:50 +0100 | [diff] [blame] | 19 | #include "zfcp_reqlist.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Christof Schmitt | a40a1ba | 2009-05-15 13:18:16 +0200 | [diff] [blame] | 21 | static unsigned int default_depth = 32; |
| 22 | module_param_named(queue_depth, default_depth, uint, 0600); |
| 23 | MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices"); |
| 24 | |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 25 | static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth, |
| 26 | int reason) |
Christof Schmitt | a40a1ba | 2009-05-15 13:18:16 +0200 | [diff] [blame] | 27 | { |
Christof Schmitt | 42e62a7 | 2009-10-15 17:47:11 -0700 | [diff] [blame] | 28 | switch (reason) { |
| 29 | case SCSI_QDEPTH_DEFAULT: |
| 30 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); |
| 31 | break; |
| 32 | case SCSI_QDEPTH_QFULL: |
| 33 | scsi_track_queue_full(sdev, depth); |
| 34 | break; |
| 35 | case SCSI_QDEPTH_RAMP_UP: |
| 36 | scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); |
| 37 | break; |
| 38 | default: |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 39 | return -EOPNOTSUPP; |
Christof Schmitt | 42e62a7 | 2009-10-15 17:47:11 -0700 | [diff] [blame] | 40 | } |
Christof Schmitt | a40a1ba | 2009-05-15 13:18:16 +0200 | [diff] [blame] | 41 | return sdev->queue_depth; |
| 42 | } |
| 43 | |
Andreas Herrmann | f6c0e7a | 2006-08-02 11:05:52 +0200 | [diff] [blame] | 44 | static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | { |
| 46 | struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; |
Christof Schmitt | 26816f1 | 2008-11-04 16:35:05 +0100 | [diff] [blame] | 47 | unit->device = NULL; |
Christof Schmitt | 615f59e | 2010-02-17 11:18:56 +0100 | [diff] [blame] | 48 | put_device(&unit->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | } |
| 50 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 51 | static int zfcp_scsi_slave_configure(struct scsi_device *sdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | { |
| 53 | if (sdp->tagged_supported) |
Christof Schmitt | a40a1ba | 2009-05-15 13:18:16 +0200 | [diff] [blame] | 54 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | else |
| 56 | scsi_adjust_queue_depth(sdp, 0, 1); |
| 57 | return 0; |
| 58 | } |
| 59 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 60 | static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | { |
Swen Schillig | 5771710 | 2009-08-18 15:43:21 +0200 | [diff] [blame] | 62 | struct zfcp_adapter *adapter = |
| 63 | (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; |
Christof Schmitt | 22ed130 | 2010-02-17 11:18:53 +0100 | [diff] [blame] | 64 | |
Martin Petermann | feac6a0 | 2008-07-02 10:56:35 +0200 | [diff] [blame] | 65 | set_host_byte(scpnt, result); |
Christof Schmitt | ab72528 | 2010-02-17 11:18:57 +0100 | [diff] [blame] | 66 | zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | scpnt->scsi_done(scpnt); |
| 68 | } |
| 69 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 70 | static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt, |
| 71 | void (*done) (struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | { |
| 73 | struct zfcp_unit *unit; |
| 74 | struct zfcp_adapter *adapter; |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 75 | int status, scsi_result, ret; |
| 76 | struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | /* reset the status for this request */ |
| 79 | scpnt->result = 0; |
| 80 | scpnt->host_scribble = NULL; |
| 81 | scpnt->scsi_done = done; |
| 82 | |
| 83 | /* |
| 84 | * figure out adapter and target device |
| 85 | * (stored there by zfcp_scsi_slave_alloc) |
| 86 | */ |
| 87 | adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 88 | unit = scpnt->device->hostdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 90 | scsi_result = fc_remote_port_chkready(rport); |
| 91 | if (unlikely(scsi_result)) { |
| 92 | scpnt->result = scsi_result; |
Christof Schmitt | ab72528 | 2010-02-17 11:18:57 +0100 | [diff] [blame] | 93 | zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt); |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 94 | scpnt->scsi_done(scpnt); |
| 95 | return 0; |
| 96 | } |
| 97 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 98 | status = atomic_read(&unit->status); |
Christof Schmitt | 8830271 | 2009-11-24 16:54:07 +0100 | [diff] [blame] | 99 | if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) && |
| 100 | !(atomic_read(&unit->port->status) & |
| 101 | ZFCP_STATUS_COMMON_ERP_FAILED)) { |
| 102 | /* only unit access denied, but port is good |
| 103 | * not covered by FC transport, have to fail here */ |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 104 | zfcp_scsi_command_fail(scpnt, DID_ERROR); |
Joe Perches | a419aef | 2009-08-18 11:18:35 -0700 | [diff] [blame] | 105 | return 0; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 106 | } |
| 107 | |
Christof Schmitt | 8830271 | 2009-11-24 16:54:07 +0100 | [diff] [blame] | 108 | if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) { |
| 109 | /* This could be either |
| 110 | * open unit pending: this is temporary, will result in |
| 111 | * open unit or ERP_FAILED, so retry command |
| 112 | * call to rport_delete pending: mimic retry from |
| 113 | * fc_remote_port_chkready until rport is BLOCKED |
| 114 | */ |
| 115 | zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY); |
| 116 | return 0; |
| 117 | } |
| 118 | |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 119 | ret = zfcp_fsf_send_fcp_command_task(unit, scpnt); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 120 | if (unlikely(ret == -EBUSY)) |
Swen Schillig | f7a65e9 | 2008-11-27 11:44:07 +0100 | [diff] [blame] | 121 | return SCSI_MLQUEUE_DEVICE_BUSY; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 122 | else if (unlikely(ret < 0)) |
| 123 | return SCSI_MLQUEUE_HOST_BUSY; |
| 124 | |
| 125 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | } |
| 127 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 128 | static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter, |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 129 | unsigned int id, u64 lun) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | { |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 131 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | struct zfcp_port *port; |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 133 | struct zfcp_unit *unit = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 135 | read_lock_irqsave(&adapter->port_list_lock, flags); |
| 136 | list_for_each_entry(port, &adapter->port_list, list) { |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 137 | if (!port->rport || (id != port->rport->scsi_target_id)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | continue; |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 139 | unit = zfcp_get_unit_by_lun(port, lun); |
| 140 | if (unit) |
| 141 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 143 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 144 | |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 145 | return unit; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | static int zfcp_scsi_slave_alloc(struct scsi_device *sdp) |
| 149 | { |
| 150 | struct zfcp_adapter *adapter; |
| 151 | struct zfcp_unit *unit; |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 152 | u64 lun; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 153 | |
| 154 | adapter = (struct zfcp_adapter *) sdp->host->hostdata[0]; |
| 155 | if (!adapter) |
| 156 | goto out; |
| 157 | |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 158 | int_to_scsilun(sdp->lun, (struct scsi_lun *)&lun); |
| 159 | unit = zfcp_unit_lookup(adapter, sdp->id, lun); |
Christof Schmitt | 86f8a1b | 2009-03-02 13:08:55 +0100 | [diff] [blame] | 160 | if (unit) { |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 161 | sdp->hostdata = unit; |
| 162 | unit->device = sdp; |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 163 | return 0; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 164 | } |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 165 | out: |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 166 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
| 168 | |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 169 | static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 171 | struct Scsi_Host *scsi_host = scpnt->device->host; |
| 172 | struct zfcp_adapter *adapter = |
| 173 | (struct zfcp_adapter *) scsi_host->hostdata[0]; |
| 174 | struct zfcp_unit *unit = scpnt->device->hostdata; |
| 175 | struct zfcp_fsf_req *old_req, *abrt_req; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | unsigned long flags; |
Christof Schmitt | a11a52b | 2009-07-13 15:06:14 +0200 | [diff] [blame] | 177 | unsigned long old_reqid = (unsigned long) scpnt->host_scribble; |
Christof Schmitt | a1dbfdd | 2010-03-24 16:50:31 +0100 | [diff] [blame] | 178 | int retval = SUCCESS, ret; |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 179 | int retry = 3; |
Christof Schmitt | a11a52b | 2009-07-13 15:06:14 +0200 | [diff] [blame] | 180 | char *dbf_tag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Andreas Herrmann | 059c97d | 2005-09-13 21:47:52 +0200 | [diff] [blame] | 182 | /* avoid race condition between late normal completion and abort */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | write_lock_irqsave(&adapter->abort_lock, flags); |
| 184 | |
Christof Schmitt | b6bd2fb | 2010-02-17 11:18:50 +0100 | [diff] [blame] | 185 | old_req = zfcp_reqlist_find(adapter->req_list, old_reqid); |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 186 | if (!old_req) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
Swen Schillig | 5771710 | 2009-08-18 15:43:21 +0200 | [diff] [blame] | 188 | zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL, |
| 189 | old_reqid); |
Christof Schmitt | c6936e7 | 2009-04-17 15:08:11 +0200 | [diff] [blame] | 190 | return FAILED; /* completion could be in progress */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 192 | old_req->data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
Andreas Herrmann | 4eff4a3 | 2006-09-18 22:29:20 +0200 | [diff] [blame] | 194 | /* don't access old fsf_req after releasing the abort_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | write_unlock_irqrestore(&adapter->abort_lock, flags); |
Andreas Herrmann | 4eff4a3 | 2006-09-18 22:29:20 +0200 | [diff] [blame] | 196 | |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 197 | while (retry--) { |
Christof Schmitt | a11a52b | 2009-07-13 15:06:14 +0200 | [diff] [blame] | 198 | abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit); |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 199 | if (abrt_req) |
| 200 | break; |
| 201 | |
| 202 | zfcp_erp_wait(adapter); |
Christof Schmitt | a1dbfdd | 2010-03-24 16:50:31 +0100 | [diff] [blame] | 203 | ret = fc_block_scsi_eh(scpnt); |
| 204 | if (ret) |
| 205 | return ret; |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 206 | if (!(atomic_read(&adapter->status) & |
| 207 | ZFCP_STATUS_COMMON_RUNNING)) { |
Swen Schillig | 5771710 | 2009-08-18 15:43:21 +0200 | [diff] [blame] | 208 | zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL, |
| 209 | old_reqid); |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 210 | return SUCCESS; |
| 211 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 213 | if (!abrt_req) |
| 214 | return FAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Swen Schillig | 058b864 | 2009-08-18 15:43:14 +0200 | [diff] [blame] | 216 | wait_for_completion(&abrt_req->completion); |
Andreas Herrmann | 059c97d | 2005-09-13 21:47:52 +0200 | [diff] [blame] | 217 | |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 218 | if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) |
Christof Schmitt | a11a52b | 2009-07-13 15:06:14 +0200 | [diff] [blame] | 219 | dbf_tag = "okay"; |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 220 | else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) |
Christof Schmitt | a11a52b | 2009-07-13 15:06:14 +0200 | [diff] [blame] | 221 | dbf_tag = "lte2"; |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 222 | else { |
Christof Schmitt | a11a52b | 2009-07-13 15:06:14 +0200 | [diff] [blame] | 223 | dbf_tag = "fail"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | retval = FAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
Swen Schillig | 5771710 | 2009-08-18 15:43:21 +0200 | [diff] [blame] | 226 | zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid); |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 227 | zfcp_fsf_req_free(abrt_req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | return retval; |
| 229 | } |
| 230 | |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 231 | static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | { |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 233 | struct zfcp_unit *unit = scpnt->device->hostdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | struct zfcp_adapter *adapter = unit->port->adapter; |
Swen Schillig | 564e1c8 | 2009-08-18 15:43:19 +0200 | [diff] [blame] | 235 | struct zfcp_fsf_req *fsf_req = NULL; |
Christof Schmitt | a1dbfdd | 2010-03-24 16:50:31 +0100 | [diff] [blame] | 236 | int retval = SUCCESS, ret; |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 237 | int retry = 3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 239 | while (retry--) { |
| 240 | fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags); |
| 241 | if (fsf_req) |
| 242 | break; |
| 243 | |
| 244 | zfcp_erp_wait(adapter); |
Christof Schmitt | a1dbfdd | 2010-03-24 16:50:31 +0100 | [diff] [blame] | 245 | ret = fc_block_scsi_eh(scpnt); |
| 246 | if (ret) |
| 247 | return ret; |
| 248 | |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 249 | if (!(atomic_read(&adapter->status) & |
| 250 | ZFCP_STATUS_COMMON_RUNNING)) { |
Swen Schillig | 5771710 | 2009-08-18 15:43:21 +0200 | [diff] [blame] | 251 | zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt); |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 252 | return SUCCESS; |
| 253 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | } |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 255 | if (!fsf_req) |
| 256 | return FAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
Swen Schillig | 058b864 | 2009-08-18 15:43:14 +0200 | [diff] [blame] | 258 | wait_for_completion(&fsf_req->completion); |
Andreas Herrmann | 77eb169 | 2005-09-13 21:48:33 +0200 | [diff] [blame] | 259 | |
Maxim Shchetynin | 8a36e45 | 2005-09-13 21:50:38 +0200 | [diff] [blame] | 260 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { |
Swen Schillig | 5771710 | 2009-08-18 15:43:21 +0200 | [diff] [blame] | 261 | zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 262 | retval = FAILED; |
Maxim Shchetynin | 8a36e45 | 2005-09-13 21:50:38 +0200 | [diff] [blame] | 263 | } else |
Swen Schillig | 5771710 | 2009-08-18 15:43:21 +0200 | [diff] [blame] | 264 | zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt); |
Andreas Herrmann | 77eb169 | 2005-09-13 21:48:33 +0200 | [diff] [blame] | 265 | |
| 266 | zfcp_fsf_req_free(fsf_req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | return retval; |
| 268 | } |
| 269 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 270 | static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) |
| 271 | { |
Christof Schmitt | 4318e08 | 2009-11-24 16:54:08 +0100 | [diff] [blame] | 272 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) |
| 276 | { |
Christof Schmitt | 4318e08 | 2009-11-24 16:54:08 +0100 | [diff] [blame] | 277 | return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 278 | } |
| 279 | |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 280 | static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
Christof Schmitt | 63caf36 | 2009-03-02 13:09:00 +0100 | [diff] [blame] | 282 | struct zfcp_unit *unit = scpnt->device->hostdata; |
| 283 | struct zfcp_adapter *adapter = unit->port->adapter; |
Christof Schmitt | a1dbfdd | 2010-03-24 16:50:31 +0100 | [diff] [blame] | 284 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Swen Schillig | 5ffd51a | 2009-03-02 13:09:04 +0100 | [diff] [blame] | 286 | zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); |
Andreas Herrmann | 8165428 | 2006-09-18 22:30:36 +0200 | [diff] [blame] | 287 | zfcp_erp_wait(adapter); |
Christof Schmitt | a1dbfdd | 2010-03-24 16:50:31 +0100 | [diff] [blame] | 288 | ret = fc_block_scsi_eh(scpnt); |
| 289 | if (ret) |
| 290 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
Andreas Herrmann | 810f1e3e | 2005-09-13 21:49:52 +0200 | [diff] [blame] | 292 | return SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | } |
| 294 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 295 | int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | { |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 297 | struct ccw_dev_id dev_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Michael Loehr | 9f28745 | 2007-05-09 11:01:24 +0200 | [diff] [blame] | 299 | if (adapter->scsi_host) |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 300 | return 0; |
Michael Loehr | 9f28745 | 2007-05-09 11:01:24 +0200 | [diff] [blame] | 301 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 302 | ccw_device_get_id(adapter->ccw_device, &dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | /* register adapter as SCSI host with mid layer of SCSI stack */ |
| 304 | adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, |
| 305 | sizeof (struct zfcp_adapter *)); |
| 306 | if (!adapter->scsi_host) { |
Christof Schmitt | 553448f | 2008-06-10 18:20:58 +0200 | [diff] [blame] | 307 | dev_err(&adapter->ccw_device->dev, |
Christof Schmitt | ff3b24f | 2008-10-01 12:42:15 +0200 | [diff] [blame] | 308 | "Registering the FCP device with the " |
| 309 | "SCSI stack failed\n"); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 310 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
| 313 | /* tell the SCSI stack some characteristics of this adapter */ |
| 314 | adapter->scsi_host->max_id = 1; |
| 315 | adapter->scsi_host->max_lun = 1; |
| 316 | adapter->scsi_host->max_channel = 0; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 317 | adapter->scsi_host->unique_id = dev_id.devno; |
Christof Schmitt | 4318e08 | 2009-11-24 16:54:08 +0100 | [diff] [blame] | 318 | adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */ |
Heiko Carstens | dd52e0e | 2006-09-18 22:28:49 +0200 | [diff] [blame] | 319 | adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | adapter->scsi_host->hostdata[0] = (unsigned long) adapter; |
| 322 | |
| 323 | if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { |
| 324 | scsi_host_put(adapter->scsi_host); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 325 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 327 | |
| 328 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | } |
| 330 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 331 | void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | { |
| 333 | struct Scsi_Host *shost; |
Andreas Herrmann | 13e1e1f | 2005-09-19 16:56:17 +0200 | [diff] [blame] | 334 | struct zfcp_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
| 336 | shost = adapter->scsi_host; |
| 337 | if (!shost) |
| 338 | return; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 339 | |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 340 | read_lock_irq(&adapter->port_list_lock); |
| 341 | list_for_each_entry(port, &adapter->port_list, list) |
Swen Schillig | f3450c7 | 2009-11-24 16:53:59 +0100 | [diff] [blame] | 342 | port->rport = NULL; |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 343 | read_unlock_irq(&adapter->port_list_lock); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 344 | |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 345 | fc_remove_host(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | scsi_remove_host(shost); |
| 347 | scsi_host_put(shost); |
| 348 | adapter->scsi_host = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
| 350 | return; |
| 351 | } |
| 352 | |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 353 | static struct fc_host_statistics* |
| 354 | zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | { |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 356 | struct fc_host_statistics *fc_stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 358 | if (!adapter->fc_stats) { |
| 359 | fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL); |
| 360 | if (!fc_stats) |
| 361 | return NULL; |
Swen Schillig | f3450c7 | 2009-11-24 16:53:59 +0100 | [diff] [blame] | 362 | adapter->fc_stats = fc_stats; /* freed in adapter_release */ |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 363 | } |
| 364 | memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats)); |
| 365 | return adapter->fc_stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 368 | static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, |
| 369 | struct fsf_qtcb_bottom_port *data, |
| 370 | struct fsf_qtcb_bottom_port *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | { |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 372 | fc_stats->seconds_since_last_reset = |
| 373 | data->seconds_since_last_reset - old->seconds_since_last_reset; |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 374 | fc_stats->tx_frames = data->tx_frames - old->tx_frames; |
| 375 | fc_stats->tx_words = data->tx_words - old->tx_words; |
| 376 | fc_stats->rx_frames = data->rx_frames - old->rx_frames; |
| 377 | fc_stats->rx_words = data->rx_words - old->rx_words; |
| 378 | fc_stats->lip_count = data->lip - old->lip; |
| 379 | fc_stats->nos_count = data->nos - old->nos; |
| 380 | fc_stats->error_frames = data->error_frames - old->error_frames; |
| 381 | fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; |
| 382 | fc_stats->link_failure_count = data->link_failure - old->link_failure; |
| 383 | fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 384 | fc_stats->loss_of_signal_count = |
| 385 | data->loss_of_signal - old->loss_of_signal; |
| 386 | fc_stats->prim_seq_protocol_err_count = |
| 387 | data->psp_error_counts - old->psp_error_counts; |
| 388 | fc_stats->invalid_tx_word_count = |
| 389 | data->invalid_tx_words - old->invalid_tx_words; |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 390 | fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 391 | fc_stats->fcp_input_requests = |
| 392 | data->input_requests - old->input_requests; |
| 393 | fc_stats->fcp_output_requests = |
| 394 | data->output_requests - old->output_requests; |
| 395 | fc_stats->fcp_control_requests = |
| 396 | data->control_requests - old->control_requests; |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 397 | fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; |
| 398 | fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
| 400 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 401 | static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, |
| 402 | struct fsf_qtcb_bottom_port *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | { |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 404 | fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; |
| 405 | fc_stats->tx_frames = data->tx_frames; |
| 406 | fc_stats->tx_words = data->tx_words; |
| 407 | fc_stats->rx_frames = data->rx_frames; |
| 408 | fc_stats->rx_words = data->rx_words; |
| 409 | fc_stats->lip_count = data->lip; |
| 410 | fc_stats->nos_count = data->nos; |
| 411 | fc_stats->error_frames = data->error_frames; |
| 412 | fc_stats->dumped_frames = data->dumped_frames; |
| 413 | fc_stats->link_failure_count = data->link_failure; |
| 414 | fc_stats->loss_of_sync_count = data->loss_of_sync; |
| 415 | fc_stats->loss_of_signal_count = data->loss_of_signal; |
| 416 | fc_stats->prim_seq_protocol_err_count = data->psp_error_counts; |
| 417 | fc_stats->invalid_tx_word_count = data->invalid_tx_words; |
| 418 | fc_stats->invalid_crc_count = data->invalid_crcs; |
| 419 | fc_stats->fcp_input_requests = data->input_requests; |
| 420 | fc_stats->fcp_output_requests = data->output_requests; |
| 421 | fc_stats->fcp_control_requests = data->control_requests; |
| 422 | fc_stats->fcp_input_megabytes = data->input_mb; |
| 423 | fc_stats->fcp_output_megabytes = data->output_mb; |
| 424 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 426 | static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host) |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 427 | { |
| 428 | struct zfcp_adapter *adapter; |
| 429 | struct fc_host_statistics *fc_stats; |
| 430 | struct fsf_qtcb_bottom_port *data; |
| 431 | int ret; |
| 432 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 433 | adapter = (struct zfcp_adapter *)host->hostdata[0]; |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 434 | fc_stats = zfcp_init_fc_host_stats(adapter); |
| 435 | if (!fc_stats) |
| 436 | return NULL; |
| 437 | |
Andreas Herrmann | ec4081c | 2006-05-22 18:17:30 +0200 | [diff] [blame] | 438 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 439 | if (!data) |
| 440 | return NULL; |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 441 | |
Swen Schillig | 564e1c8 | 2009-08-18 15:43:19 +0200 | [diff] [blame] | 442 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 443 | if (ret) { |
| 444 | kfree(data); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 445 | return NULL; |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 446 | } |
| 447 | |
| 448 | if (adapter->stats_reset && |
| 449 | ((jiffies/HZ - adapter->stats_reset) < |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 450 | data->seconds_since_last_reset)) |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 451 | zfcp_adjust_fc_host_stats(fc_stats, data, |
| 452 | adapter->stats_reset_data); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 453 | else |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 454 | zfcp_set_fc_host_stats(fc_stats, data); |
| 455 | |
| 456 | kfree(data); |
| 457 | return fc_stats; |
| 458 | } |
| 459 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 460 | static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost) |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 461 | { |
| 462 | struct zfcp_adapter *adapter; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 463 | struct fsf_qtcb_bottom_port *data; |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 464 | int ret; |
| 465 | |
| 466 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
Andreas Herrmann | ec4081c | 2006-05-22 18:17:30 +0200 | [diff] [blame] | 467 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 468 | if (!data) |
| 469 | return; |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 470 | |
Swen Schillig | 564e1c8 | 2009-08-18 15:43:19 +0200 | [diff] [blame] | 471 | ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 472 | if (ret) |
Heiko Carstens | 83f6d6d | 2007-08-08 10:47:02 +0200 | [diff] [blame] | 473 | kfree(data); |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 474 | else { |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 475 | adapter->stats_reset = jiffies/HZ; |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 476 | kfree(adapter->stats_reset_data); |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 477 | adapter->stats_reset_data = data; /* finally freed in |
Swen Schillig | f3450c7 | 2009-11-24 16:53:59 +0100 | [diff] [blame] | 478 | adapter_release */ |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 479 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | } |
| 481 | |
Sven Schuetz | 85a8239 | 2008-06-10 18:20:59 +0200 | [diff] [blame] | 482 | static void zfcp_get_host_port_state(struct Scsi_Host *shost) |
| 483 | { |
| 484 | struct zfcp_adapter *adapter = |
| 485 | (struct zfcp_adapter *)shost->hostdata[0]; |
| 486 | int status = atomic_read(&adapter->status); |
| 487 | |
| 488 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && |
| 489 | !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)) |
| 490 | fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; |
| 491 | else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED) |
| 492 | fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
| 493 | else if (status & ZFCP_STATUS_COMMON_ERP_FAILED) |
| 494 | fc_host_port_state(shost) = FC_PORTSTATE_ERROR; |
| 495 | else |
| 496 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; |
| 497 | } |
| 498 | |
Andreas Herrmann | 338151e | 2006-05-22 18:25:56 +0200 | [diff] [blame] | 499 | static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) |
| 500 | { |
| 501 | rport->dev_loss_tmo = timeout; |
| 502 | } |
| 503 | |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 504 | /** |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 505 | * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport |
| 506 | * @rport: The FC rport where to teminate I/O |
| 507 | * |
| 508 | * Abort all pending SCSI commands for a port by closing the |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 509 | * port. Using a reopen avoiding a conflict with a shutdown |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 510 | * overwriting a reopen. |
| 511 | */ |
| 512 | static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport) |
| 513 | { |
Christof Schmitt | 7093293 | 2009-04-17 15:08:15 +0200 | [diff] [blame] | 514 | struct zfcp_port *port; |
Swen Schillig | ea945ff | 2009-08-18 15:43:24 +0200 | [diff] [blame] | 515 | struct Scsi_Host *shost = rport_to_shost(rport); |
| 516 | struct zfcp_adapter *adapter = |
| 517 | (struct zfcp_adapter *)shost->hostdata[0]; |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 518 | |
Swen Schillig | ea945ff | 2009-08-18 15:43:24 +0200 | [diff] [blame] | 519 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
Christof Schmitt | 7093293 | 2009-04-17 15:08:15 +0200 | [diff] [blame] | 520 | |
| 521 | if (port) { |
| 522 | zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL); |
Christof Schmitt | 615f59e | 2010-02-17 11:18:56 +0100 | [diff] [blame] | 523 | put_device(&port->dev); |
Christof Schmitt | 7093293 | 2009-04-17 15:08:15 +0200 | [diff] [blame] | 524 | } |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 525 | } |
| 526 | |
Christof Schmitt | 5a7de55 | 2010-07-08 09:53:07 +0200 | [diff] [blame^] | 527 | static void zfcp_scsi_queue_unit_register(struct zfcp_port *port) |
| 528 | { |
| 529 | struct zfcp_unit *unit; |
| 530 | |
| 531 | read_lock_irq(&port->unit_list_lock); |
| 532 | list_for_each_entry(unit, &port->unit_list, list) { |
| 533 | get_device(&unit->dev); |
| 534 | if (scsi_queue_work(port->adapter->scsi_host, |
| 535 | &unit->scsi_work) <= 0) |
| 536 | put_device(&unit->dev); |
| 537 | } |
| 538 | read_unlock_irq(&port->unit_list_lock); |
| 539 | } |
| 540 | |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 541 | static void zfcp_scsi_rport_register(struct zfcp_port *port) |
| 542 | { |
| 543 | struct fc_rport_identifiers ids; |
| 544 | struct fc_rport *rport; |
| 545 | |
Christof Schmitt | 379d6bf | 2009-07-13 15:06:11 +0200 | [diff] [blame] | 546 | if (port->rport) |
| 547 | return; |
| 548 | |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 549 | ids.node_name = port->wwnn; |
| 550 | ids.port_name = port->wwpn; |
| 551 | ids.port_id = port->d_id; |
| 552 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; |
| 553 | |
| 554 | rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); |
| 555 | if (!rport) { |
| 556 | dev_err(&port->adapter->ccw_device->dev, |
| 557 | "Registering port 0x%016Lx failed\n", |
| 558 | (unsigned long long)port->wwpn); |
| 559 | return; |
| 560 | } |
| 561 | |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 562 | rport->maxframe_size = port->maxframe_size; |
| 563 | rport->supported_classes = port->supported_classes; |
| 564 | port->rport = rport; |
Christof Schmitt | 5a7de55 | 2010-07-08 09:53:07 +0200 | [diff] [blame^] | 565 | |
| 566 | zfcp_scsi_queue_unit_register(port); |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 567 | } |
| 568 | |
| 569 | static void zfcp_scsi_rport_block(struct zfcp_port *port) |
| 570 | { |
Christof Schmitt | 7093293 | 2009-04-17 15:08:15 +0200 | [diff] [blame] | 571 | struct fc_rport *rport = port->rport; |
| 572 | |
Christof Schmitt | 379d6bf | 2009-07-13 15:06:11 +0200 | [diff] [blame] | 573 | if (rport) { |
Christof Schmitt | 7093293 | 2009-04-17 15:08:15 +0200 | [diff] [blame] | 574 | fc_remote_port_delete(rport); |
Christof Schmitt | 379d6bf | 2009-07-13 15:06:11 +0200 | [diff] [blame] | 575 | port->rport = NULL; |
| 576 | } |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | void zfcp_scsi_schedule_rport_register(struct zfcp_port *port) |
| 580 | { |
Christof Schmitt | 615f59e | 2010-02-17 11:18:56 +0100 | [diff] [blame] | 581 | get_device(&port->dev); |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 582 | port->rport_task = RPORT_ADD; |
| 583 | |
Swen Schillig | 4544683 | 2009-08-18 15:43:17 +0200 | [diff] [blame] | 584 | if (!queue_work(port->adapter->work_queue, &port->rport_work)) |
Christof Schmitt | 615f59e | 2010-02-17 11:18:56 +0100 | [diff] [blame] | 585 | put_device(&port->dev); |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | void zfcp_scsi_schedule_rport_block(struct zfcp_port *port) |
| 589 | { |
Christof Schmitt | 615f59e | 2010-02-17 11:18:56 +0100 | [diff] [blame] | 590 | get_device(&port->dev); |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 591 | port->rport_task = RPORT_DEL; |
| 592 | |
Swen Schillig | 4544683 | 2009-08-18 15:43:17 +0200 | [diff] [blame] | 593 | if (port->rport && queue_work(port->adapter->work_queue, |
| 594 | &port->rport_work)) |
Swen Schillig | a67417a | 2009-08-18 15:43:06 +0200 | [diff] [blame] | 595 | return; |
| 596 | |
Christof Schmitt | 615f59e | 2010-02-17 11:18:56 +0100 | [diff] [blame] | 597 | put_device(&port->dev); |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 598 | } |
| 599 | |
| 600 | void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter) |
| 601 | { |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 602 | unsigned long flags; |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 603 | struct zfcp_port *port; |
| 604 | |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 605 | read_lock_irqsave(&adapter->port_list_lock, flags); |
| 606 | list_for_each_entry(port, &adapter->port_list, list) |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 607 | zfcp_scsi_schedule_rport_block(port); |
Swen Schillig | ecf0c77 | 2009-11-24 16:53:58 +0100 | [diff] [blame] | 608 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 609 | } |
| 610 | |
| 611 | void zfcp_scsi_rport_work(struct work_struct *work) |
| 612 | { |
| 613 | struct zfcp_port *port = container_of(work, struct zfcp_port, |
| 614 | rport_work); |
| 615 | |
| 616 | while (port->rport_task) { |
| 617 | if (port->rport_task == RPORT_ADD) { |
| 618 | port->rport_task = RPORT_NONE; |
| 619 | zfcp_scsi_rport_register(port); |
| 620 | } else { |
| 621 | port->rport_task = RPORT_NONE; |
| 622 | zfcp_scsi_rport_block(port); |
| 623 | } |
| 624 | } |
| 625 | |
Christof Schmitt | 615f59e | 2010-02-17 11:18:56 +0100 | [diff] [blame] | 626 | put_device(&port->dev); |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 627 | } |
| 628 | |
Christof Schmitt | 5a7de55 | 2010-07-08 09:53:07 +0200 | [diff] [blame^] | 629 | /** |
| 630 | * zfcp_scsi_scan - Register LUN with SCSI midlayer |
| 631 | * @unit: The LUN/unit to register |
| 632 | */ |
| 633 | void zfcp_scsi_scan(struct zfcp_unit *unit) |
Swen Schillig | 92d5193 | 2009-04-17 15:08:04 +0200 | [diff] [blame] | 634 | { |
Christof Schmitt | 5a7de55 | 2010-07-08 09:53:07 +0200 | [diff] [blame^] | 635 | struct fc_rport *rport = unit->port->rport; |
Swen Schillig | 92d5193 | 2009-04-17 15:08:04 +0200 | [diff] [blame] | 636 | |
| 637 | if (rport && rport->port_state == FC_PORTSTATE_ONLINE) |
| 638 | scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, |
| 639 | scsilun_to_int((struct scsi_lun *) |
| 640 | &unit->fcp_lun), 0); |
Christof Schmitt | 5a7de55 | 2010-07-08 09:53:07 +0200 | [diff] [blame^] | 641 | } |
Swen Schillig | 92d5193 | 2009-04-17 15:08:04 +0200 | [diff] [blame] | 642 | |
Christof Schmitt | 5a7de55 | 2010-07-08 09:53:07 +0200 | [diff] [blame^] | 643 | void zfcp_scsi_scan_work(struct work_struct *work) |
| 644 | { |
| 645 | struct zfcp_unit *unit = container_of(work, struct zfcp_unit, |
| 646 | scsi_work); |
| 647 | |
| 648 | zfcp_scsi_scan(unit); |
Christof Schmitt | 615f59e | 2010-02-17 11:18:56 +0100 | [diff] [blame] | 649 | put_device(&unit->dev); |
Swen Schillig | 92d5193 | 2009-04-17 15:08:04 +0200 | [diff] [blame] | 650 | } |
| 651 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | struct fc_function_template zfcp_transport_functions = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | .show_starget_port_id = 1, |
| 654 | .show_starget_port_name = 1, |
| 655 | .show_starget_node_name = 1, |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 656 | .show_rport_supported_classes = 1, |
Ralph Wuerthner | 75bfc28 | 2006-05-22 18:24:33 +0200 | [diff] [blame] | 657 | .show_rport_maxframe_size = 1, |
Andreas Herrmann | 338151e | 2006-05-22 18:25:56 +0200 | [diff] [blame] | 658 | .show_rport_dev_loss_tmo = 1, |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 659 | .show_host_node_name = 1, |
| 660 | .show_host_port_name = 1, |
Andreas Herrmann | ad757cd | 2006-01-13 02:26:11 +0100 | [diff] [blame] | 661 | .show_host_permanent_port_name = 1, |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 662 | .show_host_supported_classes = 1, |
Christof Schmitt | 0fdd213 | 2009-11-24 16:54:17 +0100 | [diff] [blame] | 663 | .show_host_supported_fc4s = 1, |
Andreas Herrmann | ad757cd | 2006-01-13 02:26:11 +0100 | [diff] [blame] | 664 | .show_host_supported_speeds = 1, |
Andreas Herrmann | 13e1e1f | 2005-09-19 16:56:17 +0200 | [diff] [blame] | 665 | .show_host_maxframe_size = 1, |
Andreas Herrmann | 3859f6a | 2005-08-27 11:07:54 -0700 | [diff] [blame] | 666 | .show_host_serial_number = 1, |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 667 | .get_fc_host_stats = zfcp_get_fc_host_stats, |
| 668 | .reset_fc_host_stats = zfcp_reset_fc_host_stats, |
Andreas Herrmann | 338151e | 2006-05-22 18:25:56 +0200 | [diff] [blame] | 669 | .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, |
Sven Schuetz | 85a8239 | 2008-06-10 18:20:59 +0200 | [diff] [blame] | 670 | .get_host_port_state = zfcp_get_host_port_state, |
Christof Schmitt | a2fa0ae | 2009-03-02 13:09:08 +0100 | [diff] [blame] | 671 | .terminate_rport_io = zfcp_scsi_terminate_rport_io, |
Sven Schuetz | 85a8239 | 2008-06-10 18:20:59 +0200 | [diff] [blame] | 672 | .show_host_port_state = 1, |
Christof Schmitt | 0fdd213 | 2009-11-24 16:54:17 +0100 | [diff] [blame] | 673 | .show_host_active_fc4s = 1, |
Christof Schmitt | 7c7dc19 | 2009-11-24 16:54:13 +0100 | [diff] [blame] | 674 | .bsg_request = zfcp_fc_exec_bsg_job, |
Swen Schillig | 491ca44 | 2010-01-14 17:19:01 +0100 | [diff] [blame] | 675 | .bsg_timeout = zfcp_fc_timeout_bsg_job, |
Andreas Herrmann | f6cd94b | 2006-01-05 09:59:34 +0100 | [diff] [blame] | 676 | /* no functions registered for following dynamic attributes but |
| 677 | directly set by LLDD */ |
Andreas Herrmann | ad757cd | 2006-01-13 02:26:11 +0100 | [diff] [blame] | 678 | .show_host_port_type = 1, |
Andreas Herrmann | 13e1e1f | 2005-09-19 16:56:17 +0200 | [diff] [blame] | 679 | .show_host_speed = 1, |
| 680 | .show_host_port_id = 1, |
Swen Schillig | 52ef11a | 2007-08-28 09:31:09 +0200 | [diff] [blame] | 681 | .disable_target_scan = 1, |
Christof Schmitt | 7c7dc19 | 2009-11-24 16:54:13 +0100 | [diff] [blame] | 682 | .dd_bsg_size = sizeof(struct zfcp_fsf_ct_els), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | }; |
| 684 | |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 685 | struct zfcp_data zfcp_data = { |
| 686 | .scsi_host_template = { |
| 687 | .name = "zfcp", |
| 688 | .module = THIS_MODULE, |
| 689 | .proc_name = "zfcp", |
Christof Schmitt | a40a1ba | 2009-05-15 13:18:16 +0200 | [diff] [blame] | 690 | .change_queue_depth = zfcp_scsi_change_queue_depth, |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 691 | .slave_alloc = zfcp_scsi_slave_alloc, |
| 692 | .slave_configure = zfcp_scsi_slave_configure, |
| 693 | .slave_destroy = zfcp_scsi_slave_destroy, |
| 694 | .queuecommand = zfcp_scsi_queuecommand, |
| 695 | .eh_abort_handler = zfcp_scsi_eh_abort_handler, |
| 696 | .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler, |
| 697 | .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler, |
| 698 | .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, |
| 699 | .can_queue = 4096, |
| 700 | .this_id = -1, |
Christof Schmitt | 1674b40 | 2010-04-30 18:09:34 +0200 | [diff] [blame] | 701 | .sg_tablesize = ZFCP_FSF_MAX_SBALES_PER_REQ, |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 702 | .cmd_per_lun = 1, |
| 703 | .use_clustering = 1, |
| 704 | .sdev_attrs = zfcp_sysfs_sdev_attrs, |
Christof Schmitt | 1674b40 | 2010-04-30 18:09:34 +0200 | [diff] [blame] | 705 | .max_sectors = (ZFCP_FSF_MAX_SBALES_PER_REQ * 8), |
Christof Schmitt | 6832298 | 2010-04-30 18:09:33 +0200 | [diff] [blame] | 706 | .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, |
Swen Schillig | 6022192 | 2008-07-02 10:56:38 +0200 | [diff] [blame] | 707 | .shost_attrs = zfcp_sysfs_shost_attrs, |
Martin Petermann | f76af7d7 | 2008-07-02 10:56:36 +0200 | [diff] [blame] | 708 | }, |
| 709 | }; |