| /* |
| * Target driver for EMC CLARiiON AX/CX-series hardware. |
| * Based on code from Lars Marowsky-Bree <lmb@suse.de> |
| * and Ed Goggin <egoggin@emc.com>. |
| * |
| * Copyright (C) 2006 Red Hat, Inc. All rights reserved. |
| * Copyright (C) 2006 Mike Christie |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; see the file COPYING. If not, write to |
| * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_eh.h> |
| #include <scsi/scsi_dh.h> |
| #include <scsi/scsi_device.h> |
| |
| #define CLARIION_NAME "emc" |
| |
| #define CLARIION_TRESPASS_PAGE 0x22 |
| #define CLARIION_BUFFER_SIZE 0xFC |
| #define CLARIION_TIMEOUT (60 * HZ) |
| #define CLARIION_RETRIES 3 |
| #define CLARIION_UNBOUND_LU -1 |
| #define CLARIION_SP_A 0 |
| #define CLARIION_SP_B 1 |
| |
| /* Flags */ |
| #define CLARIION_SHORT_TRESPASS 1 |
| #define CLARIION_HONOR_RESERVATIONS 2 |
| |
| /* LUN states */ |
| #define CLARIION_LUN_UNINITIALIZED -1 |
| #define CLARIION_LUN_UNBOUND 0 |
| #define CLARIION_LUN_BOUND 1 |
| #define CLARIION_LUN_OWNED 2 |
| |
| static unsigned char long_trespass[] = { |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| CLARIION_TRESPASS_PAGE, /* Page code */ |
| 0x09, /* Page length - 2 */ |
| 0x01, /* Trespass code */ |
| 0xff, 0xff, /* Trespass target */ |
| 0, 0, 0, 0, 0, 0 /* Reserved bytes / unknown */ |
| }; |
| |
| static unsigned char short_trespass[] = { |
| 0, 0, 0, 0, |
| CLARIION_TRESPASS_PAGE, /* Page code */ |
| 0x02, /* Page length - 2 */ |
| 0x01, /* Trespass code */ |
| 0xff, /* Trespass target */ |
| }; |
| |
| static const char * lun_state[] = |
| { |
| "not bound", |
| "bound", |
| "owned", |
| }; |
| |
| struct clariion_dh_data { |
| struct scsi_dh_data dh_data; |
| /* |
| * Flags: |
| * CLARIION_SHORT_TRESPASS |
| * Use short trespass command (FC-series) or the long version |
| * (default for AX/CX CLARiiON arrays). |
| * |
| * CLARIION_HONOR_RESERVATIONS |
| * Whether or not (default) to honor SCSI reservations when |
| * initiating a switch-over. |
| */ |
| unsigned flags; |
| /* |
| * I/O buffer for both MODE_SELECT and INQUIRY commands. |
| */ |
| unsigned char buffer[CLARIION_BUFFER_SIZE]; |
| /* |
| * SCSI sense buffer for commands -- assumes serial issuance |
| * and completion sequence of all commands for same multipath. |
| */ |
| unsigned char sense[SCSI_SENSE_BUFFERSIZE]; |
| unsigned int senselen; |
| /* |
| * LUN state |
| */ |
| int lun_state; |
| /* |
| * SP Port number |
| */ |
| int port; |
| /* |
| * which SP (A=0,B=1,UNBOUND=-1) is the default SP for this |
| * path's mapped LUN |
| */ |
| int default_sp; |
| /* |
| * which SP (A=0,B=1,UNBOUND=-1) is the active SP for this |
| * path's mapped LUN |
| */ |
| int current_sp; |
| }; |
| |
| static inline struct clariion_dh_data |
| *get_clariion_data(struct scsi_device *sdev) |
| { |
| return container_of(sdev->scsi_dh_data, struct clariion_dh_data, |
| dh_data); |
| } |
| |
| /* |
| * Parse MODE_SELECT cmd reply. |
| */ |
| static int trespass_endio(struct scsi_device *sdev, char *sense) |
| { |
| int err = SCSI_DH_IO; |
| struct scsi_sense_hdr sshdr; |
| |
| if (!scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, &sshdr)) { |
| sdev_printk(KERN_ERR, sdev, "%s: Found valid sense data 0x%2x, " |
| "0x%2x, 0x%2x while sending CLARiiON trespass " |
| "command.\n", CLARIION_NAME, sshdr.sense_key, |
| sshdr.asc, sshdr.ascq); |
| |
| if ((sshdr.sense_key == 0x05) && (sshdr.asc == 0x04) && |
| (sshdr.ascq == 0x00)) { |
| /* |
| * Array based copy in progress -- do not send |
| * mode_select or copy will be aborted mid-stream. |
| */ |
| sdev_printk(KERN_INFO, sdev, "%s: Array Based Copy in " |
| "progress while sending CLARiiON trespass " |
| "command.\n", CLARIION_NAME); |
| err = SCSI_DH_DEV_TEMP_BUSY; |
| } else if ((sshdr.sense_key == 0x02) && (sshdr.asc == 0x04) && |
| (sshdr.ascq == 0x03)) { |
| /* |
| * LUN Not Ready - Manual Intervention Required |
| * indicates in-progress ucode upgrade (NDU). |
| */ |
| sdev_printk(KERN_INFO, sdev, "%s: Detected in-progress " |
| "ucode upgrade NDU operation while sending " |
| "CLARiiON trespass command.\n", CLARIION_NAME); |
| err = SCSI_DH_DEV_TEMP_BUSY; |
| } else |
| err = SCSI_DH_DEV_FAILED; |
| } else { |
| sdev_printk(KERN_INFO, sdev, |
| "%s: failed to send MODE SELECT, no sense available\n", |
| CLARIION_NAME); |
| } |
| return err; |
| } |
| |
| static int parse_sp_info_reply(struct scsi_device *sdev, |
| struct clariion_dh_data *csdev) |
| { |
| int err = SCSI_DH_OK; |
| |
| /* check for in-progress ucode upgrade (NDU) */ |
| if (csdev->buffer[48] != 0) { |
| sdev_printk(KERN_NOTICE, sdev, "%s: Detected in-progress " |
| "ucode upgrade NDU operation while finding " |
| "current active SP.", CLARIION_NAME); |
| err = SCSI_DH_DEV_TEMP_BUSY; |
| goto out; |
| } |
| if (csdev->buffer[4] > 2) { |
| /* Invalid buffer format */ |
| sdev_printk(KERN_NOTICE, sdev, |
| "%s: invalid VPD page 0xC0 format\n", |
| CLARIION_NAME); |
| err = SCSI_DH_NOSYS; |
| goto out; |
| } |
| switch (csdev->buffer[28] & 0x0f) { |
| case 6: |
| sdev_printk(KERN_NOTICE, sdev, |
| "%s: ALUA failover mode detected\n", |
| CLARIION_NAME); |
| break; |
| case 4: |
| /* Linux failover */ |
| break; |
| default: |
| sdev_printk(KERN_WARNING, sdev, |
| "%s: Invalid failover mode %d\n", |
| CLARIION_NAME, csdev->buffer[28] & 0x0f); |
| err = SCSI_DH_NOSYS; |
| goto out; |
| } |
| |
| csdev->default_sp = csdev->buffer[5]; |
| csdev->lun_state = csdev->buffer[4]; |
| csdev->current_sp = csdev->buffer[8]; |
| csdev->port = csdev->buffer[7]; |
| |
| out: |
| return err; |
| } |
| |
| #define emc_default_str "FC (Legacy)" |
| |
| static char * parse_sp_model(struct scsi_device *sdev, unsigned char *buffer) |
| { |
| unsigned char len = buffer[4] + 5; |
| char *sp_model = NULL; |
| unsigned char sp_len, serial_len; |
| |
| if (len < 160) { |
| sdev_printk(KERN_WARNING, sdev, |
| "%s: Invalid information section length %d\n", |
| CLARIION_NAME, len); |
| /* Check for old FC arrays */ |
| if (!strncmp(buffer + 8, "DGC", 3)) { |
| /* Old FC array, not supporting extended information */ |
| sp_model = emc_default_str; |
| } |
| goto out; |
| } |
| |
| /* |
| * Parse extended information for SP model number |
| */ |
| serial_len = buffer[160]; |
| if (serial_len == 0 || serial_len + 161 > len) { |
| sdev_printk(KERN_WARNING, sdev, |
| "%s: Invalid array serial number length %d\n", |
| CLARIION_NAME, serial_len); |
| goto out; |
| } |
| sp_len = buffer[99]; |
| if (sp_len == 0 || serial_len + sp_len + 161 > len) { |
| sdev_printk(KERN_WARNING, sdev, |
| "%s: Invalid model number length %d\n", |
| CLARIION_NAME, sp_len); |
| goto out; |
| } |
| sp_model = &buffer[serial_len + 161]; |
| /* Strip whitespace at the end */ |
| while (sp_len > 1 && sp_model[sp_len - 1] == ' ') |
| sp_len--; |
| |
| sp_model[sp_len] = '\0'; |
| |
| out: |
| return sp_model; |
| } |
| |
| /* |
| * Get block request for REQ_BLOCK_PC command issued to path. Currently |
| * limited to MODE_SELECT (trespass) and INQUIRY (VPD page 0xC0) commands. |
| * |
| * Uses data and sense buffers in hardware handler context structure and |
| * assumes serial servicing of commands, both issuance and completion. |
| */ |
| static struct request *get_req(struct scsi_device *sdev, int cmd, |
| unsigned char *buffer) |
| { |
| struct request *rq; |
| int len = 0; |
| |
| rq = blk_get_request(sdev->request_queue, |
| (cmd != INQUIRY) ? WRITE : READ, GFP_NOIO); |
| if (IS_ERR(rq)) { |
| sdev_printk(KERN_INFO, sdev, "get_req: blk_get_request failed"); |
| return NULL; |
| } |
| |
| blk_rq_set_block_pc(rq); |
| rq->cmd_len = COMMAND_SIZE(cmd); |
| rq->cmd[0] = cmd; |
| |
| switch (cmd) { |
| case MODE_SELECT: |
| len = sizeof(short_trespass); |
| rq->cmd[1] = 0x10; |
| rq->cmd[4] = len; |
| break; |
| case MODE_SELECT_10: |
| len = sizeof(long_trespass); |
| rq->cmd[1] = 0x10; |
| rq->cmd[8] = len; |
| break; |
| case INQUIRY: |
| len = CLARIION_BUFFER_SIZE; |
| rq->cmd[4] = len; |
| memset(buffer, 0, len); |
| break; |
| default: |
| BUG_ON(1); |
| break; |
| } |
| |
| rq->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | |
| REQ_FAILFAST_DRIVER; |
| rq->timeout = CLARIION_TIMEOUT; |
| rq->retries = CLARIION_RETRIES; |
| |
| if (blk_rq_map_kern(rq->q, rq, buffer, len, GFP_NOIO)) { |
| blk_put_request(rq); |
| return NULL; |
| } |
| |
| return rq; |
| } |
| |
| static int send_inquiry_cmd(struct scsi_device *sdev, int page, |
| struct clariion_dh_data *csdev) |
| { |
| struct request *rq = get_req(sdev, INQUIRY, csdev->buffer); |
| int err; |
| |
| if (!rq) |
| return SCSI_DH_RES_TEMP_UNAVAIL; |
| |
| rq->sense = csdev->sense; |
| memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); |
| rq->sense_len = csdev->senselen = 0; |
| |
| rq->cmd[0] = INQUIRY; |
| if (page != 0) { |
| rq->cmd[1] = 1; |
| rq->cmd[2] = page; |
| } |
| err = blk_execute_rq(sdev->request_queue, NULL, rq, 1); |
| if (err == -EIO) { |
| sdev_printk(KERN_INFO, sdev, |
| "%s: failed to send %s INQUIRY: %x\n", |
| CLARIION_NAME, page?"EVPD":"standard", |
| rq->errors); |
| csdev->senselen = rq->sense_len; |
| err = SCSI_DH_IO; |
| } |
| |
| blk_put_request(rq); |
| |
| return err; |
| } |
| |
| static int send_trespass_cmd(struct scsi_device *sdev, |
| struct clariion_dh_data *csdev) |
| { |
| struct request *rq; |
| unsigned char *page22; |
| int err, len, cmd; |
| |
| if (csdev->flags & CLARIION_SHORT_TRESPASS) { |
| page22 = short_trespass; |
| if (!(csdev->flags & CLARIION_HONOR_RESERVATIONS)) |
| /* Set Honor Reservations bit */ |
| page22[6] |= 0x80; |
| len = sizeof(short_trespass); |
| cmd = MODE_SELECT; |
| } else { |
| page22 = long_trespass; |
| if (!(csdev->flags & CLARIION_HONOR_RESERVATIONS)) |
| /* Set Honor Reservations bit */ |
| page22[10] |= 0x80; |
| len = sizeof(long_trespass); |
| cmd = MODE_SELECT_10; |
| } |
| BUG_ON((len > CLARIION_BUFFER_SIZE)); |
| memcpy(csdev->buffer, page22, len); |
| |
| rq = get_req(sdev, cmd, csdev->buffer); |
| if (!rq) |
| return SCSI_DH_RES_TEMP_UNAVAIL; |
| |
| rq->sense = csdev->sense; |
| memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); |
| rq->sense_len = csdev->senselen = 0; |
| |
| err = blk_execute_rq(sdev->request_queue, NULL, rq, 1); |
| if (err == -EIO) { |
| if (rq->sense_len) { |
| err = trespass_endio(sdev, csdev->sense); |
| } else { |
| sdev_printk(KERN_INFO, sdev, |
| "%s: failed to send MODE SELECT: %x\n", |
| CLARIION_NAME, rq->errors); |
| } |
| } |
| |
| blk_put_request(rq); |
| |
| return err; |
| } |
| |
| static int clariion_check_sense(struct scsi_device *sdev, |
| struct scsi_sense_hdr *sense_hdr) |
| { |
| switch (sense_hdr->sense_key) { |
| case NOT_READY: |
| if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x03) |
| /* |
| * LUN Not Ready - Manual Intervention Required |
| * indicates this is a passive path. |
| * |
| * FIXME: However, if this is seen and EVPD C0 |
| * indicates that this is due to a NDU in |
| * progress, we should set FAIL_PATH too. |
| * This indicates we might have to do a SCSI |
| * inquiry in the end_io path. Ugh. |
| * |
| * Can return FAILED only when we want the error |
| * recovery process to kick in. |
| */ |
| return SUCCESS; |
| break; |
| case ILLEGAL_REQUEST: |
| if (sense_hdr->asc == 0x25 && sense_hdr->ascq == 0x01) |
| /* |
| * An array based copy is in progress. Do not |
| * fail the path, do not bypass to another PG, |
| * do not retry. Fail the IO immediately. |
| * (Actually this is the same conclusion as in |
| * the default handler, but lets make sure.) |
| * |
| * Can return FAILED only when we want the error |
| * recovery process to kick in. |
| */ |
| return SUCCESS; |
| break; |
| case UNIT_ATTENTION: |
| if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00) |
| /* |
| * Unit Attention Code. This is the first IO |
| * to the new path, so just retry. |
| */ |
| return ADD_TO_MLQUEUE; |
| break; |
| } |
| |
| return SCSI_RETURN_NOT_HANDLED; |
| } |
| |
| static int clariion_prep_fn(struct scsi_device *sdev, struct request *req) |
| { |
| struct clariion_dh_data *h = get_clariion_data(sdev); |
| int ret = BLKPREP_OK; |
| |
| if (h->lun_state != CLARIION_LUN_OWNED) { |
| ret = BLKPREP_KILL; |
| req->cmd_flags |= REQ_QUIET; |
| } |
| return ret; |
| |
| } |
| |
| static int clariion_std_inquiry(struct scsi_device *sdev, |
| struct clariion_dh_data *csdev) |
| { |
| int err; |
| char *sp_model; |
| |
| err = send_inquiry_cmd(sdev, 0, csdev); |
| if (err != SCSI_DH_OK && csdev->senselen) { |
| struct scsi_sense_hdr sshdr; |
| |
| if (scsi_normalize_sense(csdev->sense, SCSI_SENSE_BUFFERSIZE, |
| &sshdr)) { |
| sdev_printk(KERN_ERR, sdev, "%s: INQUIRY sense code " |
| "%02x/%02x/%02x\n", CLARIION_NAME, |
| sshdr.sense_key, sshdr.asc, sshdr.ascq); |
| } |
| err = SCSI_DH_IO; |
| goto out; |
| } |
| |
| sp_model = parse_sp_model(sdev, csdev->buffer); |
| if (!sp_model) { |
| err = SCSI_DH_DEV_UNSUPP; |
| goto out; |
| } |
| |
| /* |
| * FC Series arrays do not support long trespass |
| */ |
| if (!strlen(sp_model) || !strncmp(sp_model, "FC",2)) |
| csdev->flags |= CLARIION_SHORT_TRESPASS; |
| |
| sdev_printk(KERN_INFO, sdev, |
| "%s: detected Clariion %s, flags %x\n", |
| CLARIION_NAME, sp_model, csdev->flags); |
| out: |
| return err; |
| } |
| |
| static int clariion_send_inquiry(struct scsi_device *sdev, |
| struct clariion_dh_data *csdev) |
| { |
| int err, retry = CLARIION_RETRIES; |
| |
| retry: |
| err = send_inquiry_cmd(sdev, 0xC0, csdev); |
| if (err != SCSI_DH_OK && csdev->senselen) { |
| struct scsi_sense_hdr sshdr; |
| |
| err = scsi_normalize_sense(csdev->sense, SCSI_SENSE_BUFFERSIZE, |
| &sshdr); |
| if (!err) |
| return SCSI_DH_IO; |
| |
| err = clariion_check_sense(sdev, &sshdr); |
| if (retry > 0 && err == ADD_TO_MLQUEUE) { |
| retry--; |
| goto retry; |
| } |
| sdev_printk(KERN_ERR, sdev, "%s: INQUIRY sense code " |
| "%02x/%02x/%02x\n", CLARIION_NAME, |
| sshdr.sense_key, sshdr.asc, sshdr.ascq); |
| err = SCSI_DH_IO; |
| } else { |
| err = parse_sp_info_reply(sdev, csdev); |
| } |
| return err; |
| } |
| |
| static int clariion_activate(struct scsi_device *sdev, |
| activate_complete fn, void *data) |
| { |
| struct clariion_dh_data *csdev = get_clariion_data(sdev); |
| int result; |
| |
| result = clariion_send_inquiry(sdev, csdev); |
| if (result != SCSI_DH_OK) |
| goto done; |
| |
| if (csdev->lun_state == CLARIION_LUN_OWNED) |
| goto done; |
| |
| result = send_trespass_cmd(sdev, csdev); |
| if (result != SCSI_DH_OK) |
| goto done; |
| sdev_printk(KERN_INFO, sdev,"%s: %s trespass command sent\n", |
| CLARIION_NAME, |
| csdev->flags&CLARIION_SHORT_TRESPASS?"short":"long" ); |
| |
| /* Update status */ |
| result = clariion_send_inquiry(sdev, csdev); |
| if (result != SCSI_DH_OK) |
| goto done; |
| |
| done: |
| sdev_printk(KERN_INFO, sdev, |
| "%s: at SP %c Port %d (%s, default SP %c)\n", |
| CLARIION_NAME, csdev->current_sp + 'A', |
| csdev->port, lun_state[csdev->lun_state], |
| csdev->default_sp + 'A'); |
| |
| if (fn) |
| fn(data, result); |
| return 0; |
| } |
| /* |
| * params - parameters in the following format |
| * "no_of_params\0param1\0param2\0param3\0...\0" |
| * for example, string for 2 parameters with value 10 and 21 |
| * is specified as "2\010\021\0". |
| */ |
| static int clariion_set_params(struct scsi_device *sdev, const char *params) |
| { |
| struct clariion_dh_data *csdev = get_clariion_data(sdev); |
| unsigned int hr = 0, st = 0, argc; |
| const char *p = params; |
| int result = SCSI_DH_OK; |
| |
| if ((sscanf(params, "%u", &argc) != 1) || (argc != 2)) |
| return -EINVAL; |
| |
| while (*p++) |
| ; |
| if ((sscanf(p, "%u", &st) != 1) || (st > 1)) |
| return -EINVAL; |
| |
| while (*p++) |
| ; |
| if ((sscanf(p, "%u", &hr) != 1) || (hr > 1)) |
| return -EINVAL; |
| |
| if (st) |
| csdev->flags |= CLARIION_SHORT_TRESPASS; |
| else |
| csdev->flags &= ~CLARIION_SHORT_TRESPASS; |
| |
| if (hr) |
| csdev->flags |= CLARIION_HONOR_RESERVATIONS; |
| else |
| csdev->flags &= ~CLARIION_HONOR_RESERVATIONS; |
| |
| /* |
| * If this path is owned, we have to send a trespass command |
| * with the new parameters. If not, simply return. Next trespass |
| * command would use the parameters. |
| */ |
| if (csdev->lun_state != CLARIION_LUN_OWNED) |
| goto done; |
| |
| csdev->lun_state = CLARIION_LUN_UNINITIALIZED; |
| result = send_trespass_cmd(sdev, csdev); |
| if (result != SCSI_DH_OK) |
| goto done; |
| |
| /* Update status */ |
| result = clariion_send_inquiry(sdev, csdev); |
| |
| done: |
| return result; |
| } |
| |
| static const struct scsi_dh_devlist clariion_dev_list[] = { |
| {"DGC", "RAID"}, |
| {"DGC", "DISK"}, |
| {"DGC", "VRAID"}, |
| {NULL, NULL}, |
| }; |
| |
| static bool clariion_match(struct scsi_device *sdev) |
| { |
| int i; |
| |
| if (scsi_device_tpgs(sdev)) |
| return false; |
| |
| for (i = 0; clariion_dev_list[i].vendor; i++) { |
| if (!strncmp(sdev->vendor, clariion_dev_list[i].vendor, |
| strlen(clariion_dev_list[i].vendor)) && |
| !strncmp(sdev->model, clariion_dev_list[i].model, |
| strlen(clariion_dev_list[i].model))) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static int clariion_bus_attach(struct scsi_device *sdev); |
| static void clariion_bus_detach(struct scsi_device *sdev); |
| |
| static struct scsi_device_handler clariion_dh = { |
| .name = CLARIION_NAME, |
| .module = THIS_MODULE, |
| .devlist = clariion_dev_list, |
| .attach = clariion_bus_attach, |
| .detach = clariion_bus_detach, |
| .check_sense = clariion_check_sense, |
| .activate = clariion_activate, |
| .prep_fn = clariion_prep_fn, |
| .set_params = clariion_set_params, |
| .match = clariion_match, |
| }; |
| |
| static int clariion_bus_attach(struct scsi_device *sdev) |
| { |
| struct clariion_dh_data *h; |
| unsigned long flags; |
| int err; |
| |
| h = kzalloc(sizeof(*h) , GFP_KERNEL); |
| if (!h) { |
| sdev_printk(KERN_ERR, sdev, "%s: Attach failed\n", |
| CLARIION_NAME); |
| return -ENOMEM; |
| } |
| |
| h->dh_data.scsi_dh = &clariion_dh; |
| h->lun_state = CLARIION_LUN_UNINITIALIZED; |
| h->default_sp = CLARIION_UNBOUND_LU; |
| h->current_sp = CLARIION_UNBOUND_LU; |
| |
| err = clariion_std_inquiry(sdev, h); |
| if (err != SCSI_DH_OK) |
| goto failed; |
| |
| err = clariion_send_inquiry(sdev, h); |
| if (err != SCSI_DH_OK) |
| goto failed; |
| |
| spin_lock_irqsave(sdev->request_queue->queue_lock, flags); |
| sdev->scsi_dh_data = &h->dh_data; |
| spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); |
| |
| sdev_printk(KERN_INFO, sdev, |
| "%s: connected to SP %c Port %d (%s, default SP %c)\n", |
| CLARIION_NAME, h->current_sp + 'A', |
| h->port, lun_state[h->lun_state], |
| h->default_sp + 'A'); |
| |
| return 0; |
| |
| failed: |
| kfree(h); |
| sdev_printk(KERN_ERR, sdev, "%s: not attached\n", |
| CLARIION_NAME); |
| return -EINVAL; |
| } |
| |
| static void clariion_bus_detach(struct scsi_device *sdev) |
| { |
| struct clariion_dh_data *h = get_clariion_data(sdev); |
| unsigned long flags; |
| |
| spin_lock_irqsave(sdev->request_queue->queue_lock, flags); |
| sdev->scsi_dh_data = NULL; |
| spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); |
| |
| sdev_printk(KERN_NOTICE, sdev, "%s: Detached\n", |
| CLARIION_NAME); |
| |
| kfree(h); |
| } |
| |
| static int __init clariion_init(void) |
| { |
| int r; |
| |
| r = scsi_register_device_handler(&clariion_dh); |
| if (r != 0) |
| printk(KERN_ERR "%s: Failed to register scsi device handler.", |
| CLARIION_NAME); |
| return r; |
| } |
| |
| static void __exit clariion_exit(void) |
| { |
| scsi_unregister_device_handler(&clariion_dh); |
| } |
| |
| module_init(clariion_init); |
| module_exit(clariion_exit); |
| |
| MODULE_DESCRIPTION("EMC CX/AX/FC-family driver"); |
| MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, Chandra Seetharaman <sekharan@us.ibm.com>"); |
| MODULE_LICENSE("GPL"); |