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@@ -1,700 +0,0 @@
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-/*
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- * Engenio/LSI RDAC DM HW handler
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- *
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- * Copyright (C) 2005 Mike Christie. All rights reserved.
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- * Copyright (C) Chandra Seetharaman, IBM Corp. 2007
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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- *
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- */
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-#include <scsi/scsi.h>
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-#include <scsi/scsi_cmnd.h>
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-#include <scsi/scsi_eh.h>
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-
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-#define DM_MSG_PREFIX "multipath rdac"
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-
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-#include "dm.h"
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-#include "dm-hw-handler.h"
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-
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-#define RDAC_DM_HWH_NAME "rdac"
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-#define RDAC_DM_HWH_VER "0.4"
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-
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-/*
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- * LSI mode page stuff
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- *
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- * These struct definitions and the forming of the
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- * mode page were taken from the LSI RDAC 2.4 GPL'd
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- * driver, and then converted to Linux conventions.
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- */
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-#define RDAC_QUIESCENCE_TIME 20;
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-/*
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- * Page Codes
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- */
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-#define RDAC_PAGE_CODE_REDUNDANT_CONTROLLER 0x2c
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-
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-/*
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- * Controller modes definitions
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- */
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-#define RDAC_MODE_TRANSFER_ALL_LUNS 0x01
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-#define RDAC_MODE_TRANSFER_SPECIFIED_LUNS 0x02
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-
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-/*
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- * RDAC Options field
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- */
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-#define RDAC_FORCED_QUIESENCE 0x02
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-
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-#define RDAC_FAILOVER_TIMEOUT (60 * HZ)
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-
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-struct rdac_mode_6_hdr {
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- u8 data_len;
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- u8 medium_type;
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- u8 device_params;
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- u8 block_desc_len;
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-};
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-
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-struct rdac_mode_10_hdr {
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- u16 data_len;
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- u8 medium_type;
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- u8 device_params;
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- u16 reserved;
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- u16 block_desc_len;
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-};
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-
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-struct rdac_mode_common {
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- u8 controller_serial[16];
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- u8 alt_controller_serial[16];
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- u8 rdac_mode[2];
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- u8 alt_rdac_mode[2];
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- u8 quiescence_timeout;
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- u8 rdac_options;
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-};
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-
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-struct rdac_pg_legacy {
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- struct rdac_mode_6_hdr hdr;
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- u8 page_code;
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- u8 page_len;
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- struct rdac_mode_common common;
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-#define MODE6_MAX_LUN 32
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- u8 lun_table[MODE6_MAX_LUN];
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- u8 reserved2[32];
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- u8 reserved3;
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- u8 reserved4;
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-};
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-
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-struct rdac_pg_expanded {
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- struct rdac_mode_10_hdr hdr;
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- u8 page_code;
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- u8 subpage_code;
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- u8 page_len[2];
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- struct rdac_mode_common common;
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- u8 lun_table[256];
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- u8 reserved3;
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- u8 reserved4;
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-};
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-
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-struct c9_inquiry {
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- u8 peripheral_info;
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- u8 page_code; /* 0xC9 */
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- u8 reserved1;
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- u8 page_len;
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- u8 page_id[4]; /* "vace" */
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- u8 avte_cvp;
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- u8 path_prio;
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- u8 reserved2[38];
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-};
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-
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-#define SUBSYS_ID_LEN 16
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-#define SLOT_ID_LEN 2
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-
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-struct c4_inquiry {
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- u8 peripheral_info;
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- u8 page_code; /* 0xC4 */
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- u8 reserved1;
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- u8 page_len;
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- u8 page_id[4]; /* "subs" */
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- u8 subsys_id[SUBSYS_ID_LEN];
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- u8 revision[4];
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- u8 slot_id[SLOT_ID_LEN];
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- u8 reserved[2];
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-};
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-
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-struct rdac_controller {
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- u8 subsys_id[SUBSYS_ID_LEN];
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- u8 slot_id[SLOT_ID_LEN];
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- int use_10_ms;
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- struct kref kref;
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- struct list_head node; /* list of all controllers */
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- spinlock_t lock;
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- int submitted;
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- struct list_head cmd_list; /* list of commands to be submitted */
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- union {
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- struct rdac_pg_legacy legacy;
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- struct rdac_pg_expanded expanded;
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- } mode_select;
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-};
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-struct c8_inquiry {
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- u8 peripheral_info;
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- u8 page_code; /* 0xC8 */
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- u8 reserved1;
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- u8 page_len;
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- u8 page_id[4]; /* "edid" */
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- u8 reserved2[3];
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- u8 vol_uniq_id_len;
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- u8 vol_uniq_id[16];
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- u8 vol_user_label_len;
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- u8 vol_user_label[60];
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- u8 array_uniq_id_len;
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- u8 array_unique_id[16];
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- u8 array_user_label_len;
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- u8 array_user_label[60];
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- u8 lun[8];
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-};
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-
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-struct c2_inquiry {
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- u8 peripheral_info;
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- u8 page_code; /* 0xC2 */
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- u8 reserved1;
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- u8 page_len;
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- u8 page_id[4]; /* "swr4" */
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- u8 sw_version[3];
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- u8 sw_date[3];
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- u8 features_enabled;
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- u8 max_lun_supported;
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- u8 partitions[239]; /* Total allocation length should be 0xFF */
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-};
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-
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-struct rdac_handler {
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- struct list_head entry; /* list waiting to submit MODE SELECT */
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- unsigned timeout;
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- struct rdac_controller *ctlr;
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-#define UNINITIALIZED_LUN (1 << 8)
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- unsigned lun;
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- unsigned char sense[SCSI_SENSE_BUFFERSIZE];
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- struct dm_path *path;
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- struct work_struct work;
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-#define SEND_C2_INQUIRY 1
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-#define SEND_C4_INQUIRY 2
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-#define SEND_C8_INQUIRY 3
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-#define SEND_C9_INQUIRY 4
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-#define SEND_MODE_SELECT 5
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- int cmd_to_send;
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- union {
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- struct c2_inquiry c2;
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- struct c4_inquiry c4;
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- struct c8_inquiry c8;
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- struct c9_inquiry c9;
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- } inq;
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-};
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-
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-static LIST_HEAD(ctlr_list);
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-static DEFINE_SPINLOCK(list_lock);
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-static struct workqueue_struct *rdac_wkqd;
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-
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-static inline int had_failures(struct request *req, int error)
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-{
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- return (error || host_byte(req->errors) != DID_OK ||
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- msg_byte(req->errors) != COMMAND_COMPLETE);
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-}
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-
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-static void rdac_resubmit_all(struct rdac_handler *h)
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-{
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- struct rdac_controller *ctlr = h->ctlr;
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- struct rdac_handler *tmp, *h1;
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-
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- spin_lock(&ctlr->lock);
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- list_for_each_entry_safe(h1, tmp, &ctlr->cmd_list, entry) {
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- h1->cmd_to_send = SEND_C9_INQUIRY;
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- queue_work(rdac_wkqd, &h1->work);
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- list_del(&h1->entry);
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- }
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- ctlr->submitted = 0;
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- spin_unlock(&ctlr->lock);
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-}
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-
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-static void mode_select_endio(struct request *req, int error)
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-{
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- struct rdac_handler *h = req->end_io_data;
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- struct scsi_sense_hdr sense_hdr;
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- int sense = 0, fail = 0;
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-
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- if (had_failures(req, error)) {
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- fail = 1;
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- goto failed;
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- }
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-
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- if (status_byte(req->errors) == CHECK_CONDITION) {
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- scsi_normalize_sense(req->sense, SCSI_SENSE_BUFFERSIZE,
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- &sense_hdr);
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- sense = (sense_hdr.sense_key << 16) | (sense_hdr.asc << 8) |
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- sense_hdr.ascq;
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- /* If it is retryable failure, submit the c9 inquiry again */
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- if (sense == 0x59136 || sense == 0x68b02 || sense == 0xb8b02 ||
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- sense == 0x62900) {
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- /* 0x59136 - Command lock contention
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- * 0x[6b]8b02 - Quiesense in progress or achieved
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- * 0x62900 - Power On, Reset, or Bus Device Reset
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- */
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- h->cmd_to_send = SEND_C9_INQUIRY;
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- queue_work(rdac_wkqd, &h->work);
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- goto done;
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- }
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- if (sense)
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- DMINFO("MODE_SELECT failed on %s with sense 0x%x",
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- h->path->dev->name, sense);
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- }
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-failed:
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- if (fail || sense)
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- dm_pg_init_complete(h->path, MP_FAIL_PATH);
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- else
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- dm_pg_init_complete(h->path, 0);
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-
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-done:
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- rdac_resubmit_all(h);
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- __blk_put_request(req->q, req);
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-}
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-
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-static struct request *get_rdac_req(struct rdac_handler *h,
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- void *buffer, unsigned buflen, int rw)
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-{
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- struct request *rq;
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- struct request_queue *q = bdev_get_queue(h->path->dev->bdev);
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-
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- rq = blk_get_request(q, rw, GFP_KERNEL);
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-
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- if (!rq) {
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- DMINFO("get_rdac_req: blk_get_request failed");
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- return NULL;
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- }
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-
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- if (buflen && blk_rq_map_kern(q, rq, buffer, buflen, GFP_KERNEL)) {
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- blk_put_request(rq);
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- DMINFO("get_rdac_req: blk_rq_map_kern failed");
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- return NULL;
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- }
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-
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- rq->sense = h->sense;
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- memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
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- rq->sense_len = 0;
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-
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- rq->end_io_data = h;
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- rq->timeout = h->timeout;
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- rq->cmd_type = REQ_TYPE_BLOCK_PC;
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- rq->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE;
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- return rq;
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-}
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-
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-static struct request *rdac_failover_get(struct rdac_handler *h)
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-{
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- struct request *rq;
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- struct rdac_mode_common *common;
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- unsigned data_size;
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-
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- if (h->ctlr->use_10_ms) {
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- struct rdac_pg_expanded *rdac_pg;
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-
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- data_size = sizeof(struct rdac_pg_expanded);
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- rdac_pg = &h->ctlr->mode_select.expanded;
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- memset(rdac_pg, 0, data_size);
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- common = &rdac_pg->common;
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- rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER + 0x40;
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- rdac_pg->subpage_code = 0x1;
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- rdac_pg->page_len[0] = 0x01;
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- rdac_pg->page_len[1] = 0x28;
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- rdac_pg->lun_table[h->lun] = 0x81;
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- } else {
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- struct rdac_pg_legacy *rdac_pg;
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-
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- data_size = sizeof(struct rdac_pg_legacy);
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- rdac_pg = &h->ctlr->mode_select.legacy;
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- memset(rdac_pg, 0, data_size);
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- common = &rdac_pg->common;
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- rdac_pg->page_code = RDAC_PAGE_CODE_REDUNDANT_CONTROLLER;
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- rdac_pg->page_len = 0x68;
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- rdac_pg->lun_table[h->lun] = 0x81;
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- }
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- common->rdac_mode[1] = RDAC_MODE_TRANSFER_SPECIFIED_LUNS;
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- common->quiescence_timeout = RDAC_QUIESCENCE_TIME;
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- common->rdac_options = RDAC_FORCED_QUIESENCE;
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-
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- /* get request for block layer packet command */
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- rq = get_rdac_req(h, &h->ctlr->mode_select, data_size, WRITE);
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- if (!rq) {
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- DMERR("rdac_failover_get: no rq");
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- return NULL;
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- }
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-
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- /* Prepare the command. */
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- if (h->ctlr->use_10_ms) {
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- rq->cmd[0] = MODE_SELECT_10;
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- rq->cmd[7] = data_size >> 8;
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- rq->cmd[8] = data_size & 0xff;
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- } else {
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- rq->cmd[0] = MODE_SELECT;
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- rq->cmd[4] = data_size;
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- }
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- rq->cmd_len = COMMAND_SIZE(rq->cmd[0]);
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-
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- return rq;
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-}
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-
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-/* Acquires h->ctlr->lock */
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-static void submit_mode_select(struct rdac_handler *h)
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-{
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- struct request *rq;
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- struct request_queue *q = bdev_get_queue(h->path->dev->bdev);
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-
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- spin_lock(&h->ctlr->lock);
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- if (h->ctlr->submitted) {
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- list_add(&h->entry, &h->ctlr->cmd_list);
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- goto drop_lock;
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- }
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-
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- if (!q) {
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- DMINFO("submit_mode_select: no queue");
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- goto fail_path;
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- }
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-
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- rq = rdac_failover_get(h);
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- if (!rq) {
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- DMERR("submit_mode_select: no rq");
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- goto fail_path;
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- }
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-
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- DMINFO("queueing MODE_SELECT command on %s", h->path->dev->name);
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-
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- blk_execute_rq_nowait(q, NULL, rq, 1, mode_select_endio);
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- h->ctlr->submitted = 1;
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- goto drop_lock;
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-fail_path:
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- dm_pg_init_complete(h->path, MP_FAIL_PATH);
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-drop_lock:
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- spin_unlock(&h->ctlr->lock);
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-}
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-
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-static void release_ctlr(struct kref *kref)
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-{
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- struct rdac_controller *ctlr;
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- ctlr = container_of(kref, struct rdac_controller, kref);
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-
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- spin_lock(&list_lock);
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- list_del(&ctlr->node);
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- spin_unlock(&list_lock);
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- kfree(ctlr);
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-}
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-
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-static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id)
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-{
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- struct rdac_controller *ctlr, *tmp;
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-
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- spin_lock(&list_lock);
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-
|
|
|
- list_for_each_entry(tmp, &ctlr_list, node) {
|
|
|
- if ((memcmp(tmp->subsys_id, subsys_id, SUBSYS_ID_LEN) == 0) &&
|
|
|
- (memcmp(tmp->slot_id, slot_id, SLOT_ID_LEN) == 0)) {
|
|
|
- kref_get(&tmp->kref);
|
|
|
- spin_unlock(&list_lock);
|
|
|
- return tmp;
|
|
|
- }
|
|
|
- }
|
|
|
- ctlr = kmalloc(sizeof(*ctlr), GFP_ATOMIC);
|
|
|
- if (!ctlr)
|
|
|
- goto done;
|
|
|
-
|
|
|
- /* initialize fields of controller */
|
|
|
- memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN);
|
|
|
- memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN);
|
|
|
- kref_init(&ctlr->kref);
|
|
|
- spin_lock_init(&ctlr->lock);
|
|
|
- ctlr->submitted = 0;
|
|
|
- ctlr->use_10_ms = -1;
|
|
|
- INIT_LIST_HEAD(&ctlr->cmd_list);
|
|
|
- list_add(&ctlr->node, &ctlr_list);
|
|
|
-done:
|
|
|
- spin_unlock(&list_lock);
|
|
|
- return ctlr;
|
|
|
-}
|
|
|
-
|
|
|
-static void c4_endio(struct request *req, int error)
|
|
|
-{
|
|
|
- struct rdac_handler *h = req->end_io_data;
|
|
|
- struct c4_inquiry *sp;
|
|
|
-
|
|
|
- if (had_failures(req, error)) {
|
|
|
- dm_pg_init_complete(h->path, MP_FAIL_PATH);
|
|
|
- goto done;
|
|
|
- }
|
|
|
-
|
|
|
- sp = &h->inq.c4;
|
|
|
-
|
|
|
- h->ctlr = get_controller(sp->subsys_id, sp->slot_id);
|
|
|
-
|
|
|
- if (h->ctlr) {
|
|
|
- h->cmd_to_send = SEND_C9_INQUIRY;
|
|
|
- queue_work(rdac_wkqd, &h->work);
|
|
|
- } else
|
|
|
- dm_pg_init_complete(h->path, MP_FAIL_PATH);
|
|
|
-done:
|
|
|
- __blk_put_request(req->q, req);
|
|
|
-}
|
|
|
-
|
|
|
-static void c2_endio(struct request *req, int error)
|
|
|
-{
|
|
|
- struct rdac_handler *h = req->end_io_data;
|
|
|
- struct c2_inquiry *sp;
|
|
|
-
|
|
|
- if (had_failures(req, error)) {
|
|
|
- dm_pg_init_complete(h->path, MP_FAIL_PATH);
|
|
|
- goto done;
|
|
|
- }
|
|
|
-
|
|
|
- sp = &h->inq.c2;
|
|
|
-
|
|
|
- /* If more than MODE6_MAX_LUN luns are supported, use mode select 10 */
|
|
|
- if (sp->max_lun_supported >= MODE6_MAX_LUN)
|
|
|
- h->ctlr->use_10_ms = 1;
|
|
|
- else
|
|
|
- h->ctlr->use_10_ms = 0;
|
|
|
-
|
|
|
- h->cmd_to_send = SEND_MODE_SELECT;
|
|
|
- queue_work(rdac_wkqd, &h->work);
|
|
|
-done:
|
|
|
- __blk_put_request(req->q, req);
|
|
|
-}
|
|
|
-
|
|
|
-static void c9_endio(struct request *req, int error)
|
|
|
-{
|
|
|
- struct rdac_handler *h = req->end_io_data;
|
|
|
- struct c9_inquiry *sp;
|
|
|
-
|
|
|
- if (had_failures(req, error)) {
|
|
|
- dm_pg_init_complete(h->path, MP_FAIL_PATH);
|
|
|
- goto done;
|
|
|
- }
|
|
|
-
|
|
|
- /* We need to look at the sense keys here to take clear action.
|
|
|
- * For now simple logic: If the host is in AVT mode or if controller
|
|
|
- * owns the lun, return dm_pg_init_complete(), otherwise submit
|
|
|
- * MODE SELECT.
|
|
|
- */
|
|
|
- sp = &h->inq.c9;
|
|
|
-
|
|
|
- /* If in AVT mode, return success */
|
|
|
- if ((sp->avte_cvp >> 7) == 0x1) {
|
|
|
- dm_pg_init_complete(h->path, 0);
|
|
|
- goto done;
|
|
|
- }
|
|
|
-
|
|
|
- /* If the controller on this path owns the LUN, return success */
|
|
|
- if (sp->avte_cvp & 0x1) {
|
|
|
- dm_pg_init_complete(h->path, 0);
|
|
|
- goto done;
|
|
|
- }
|
|
|
-
|
|
|
- if (h->ctlr) {
|
|
|
- if (h->ctlr->use_10_ms == -1)
|
|
|
- h->cmd_to_send = SEND_C2_INQUIRY;
|
|
|
- else
|
|
|
- h->cmd_to_send = SEND_MODE_SELECT;
|
|
|
- } else
|
|
|
- h->cmd_to_send = SEND_C4_INQUIRY;
|
|
|
- queue_work(rdac_wkqd, &h->work);
|
|
|
-done:
|
|
|
- __blk_put_request(req->q, req);
|
|
|
-}
|
|
|
-
|
|
|
-static void c8_endio(struct request *req, int error)
|
|
|
-{
|
|
|
- struct rdac_handler *h = req->end_io_data;
|
|
|
- struct c8_inquiry *sp;
|
|
|
-
|
|
|
- if (had_failures(req, error)) {
|
|
|
- dm_pg_init_complete(h->path, MP_FAIL_PATH);
|
|
|
- goto done;
|
|
|
- }
|
|
|
-
|
|
|
- /* We need to look at the sense keys here to take clear action.
|
|
|
- * For now simple logic: Get the lun from the inquiry page.
|
|
|
- */
|
|
|
- sp = &h->inq.c8;
|
|
|
- h->lun = sp->lun[7]; /* currently it uses only one byte */
|
|
|
- h->cmd_to_send = SEND_C9_INQUIRY;
|
|
|
- queue_work(rdac_wkqd, &h->work);
|
|
|
-done:
|
|
|
- __blk_put_request(req->q, req);
|
|
|
-}
|
|
|
-
|
|
|
-static void submit_inquiry(struct rdac_handler *h, int page_code,
|
|
|
- unsigned int len, rq_end_io_fn endio)
|
|
|
-{
|
|
|
- struct request *rq;
|
|
|
- struct request_queue *q = bdev_get_queue(h->path->dev->bdev);
|
|
|
-
|
|
|
- if (!q)
|
|
|
- goto fail_path;
|
|
|
-
|
|
|
- rq = get_rdac_req(h, &h->inq, len, READ);
|
|
|
- if (!rq)
|
|
|
- goto fail_path;
|
|
|
-
|
|
|
- /* Prepare the command. */
|
|
|
- rq->cmd[0] = INQUIRY;
|
|
|
- rq->cmd[1] = 1;
|
|
|
- rq->cmd[2] = page_code;
|
|
|
- rq->cmd[4] = len;
|
|
|
- rq->cmd_len = COMMAND_SIZE(INQUIRY);
|
|
|
- blk_execute_rq_nowait(q, NULL, rq, 1, endio);
|
|
|
- return;
|
|
|
-
|
|
|
-fail_path:
|
|
|
- dm_pg_init_complete(h->path, MP_FAIL_PATH);
|
|
|
-}
|
|
|
-
|
|
|
-static void service_wkq(struct work_struct *work)
|
|
|
-{
|
|
|
- struct rdac_handler *h = container_of(work, struct rdac_handler, work);
|
|
|
-
|
|
|
- switch (h->cmd_to_send) {
|
|
|
- case SEND_C2_INQUIRY:
|
|
|
- submit_inquiry(h, 0xC2, sizeof(struct c2_inquiry), c2_endio);
|
|
|
- break;
|
|
|
- case SEND_C4_INQUIRY:
|
|
|
- submit_inquiry(h, 0xC4, sizeof(struct c4_inquiry), c4_endio);
|
|
|
- break;
|
|
|
- case SEND_C8_INQUIRY:
|
|
|
- submit_inquiry(h, 0xC8, sizeof(struct c8_inquiry), c8_endio);
|
|
|
- break;
|
|
|
- case SEND_C9_INQUIRY:
|
|
|
- submit_inquiry(h, 0xC9, sizeof(struct c9_inquiry), c9_endio);
|
|
|
- break;
|
|
|
- case SEND_MODE_SELECT:
|
|
|
- submit_mode_select(h);
|
|
|
- break;
|
|
|
- default:
|
|
|
- BUG();
|
|
|
- }
|
|
|
-}
|
|
|
-/*
|
|
|
- * only support subpage2c until we confirm that this is just a matter of
|
|
|
- * of updating firmware or not, and RDAC (basic AVT works already) for now
|
|
|
- * but we can add these in in when we get time and testers
|
|
|
- */
|
|
|
-static int rdac_create(struct hw_handler *hwh, unsigned argc, char **argv)
|
|
|
-{
|
|
|
- struct rdac_handler *h;
|
|
|
- unsigned timeout;
|
|
|
-
|
|
|
- if (argc == 0) {
|
|
|
- /* No arguments: use defaults */
|
|
|
- timeout = RDAC_FAILOVER_TIMEOUT;
|
|
|
- } else if (argc != 1) {
|
|
|
- DMWARN("incorrect number of arguments");
|
|
|
- return -EINVAL;
|
|
|
- } else {
|
|
|
- if (sscanf(argv[1], "%u", &timeout) != 1) {
|
|
|
- DMWARN("invalid timeout value");
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- h = kzalloc(sizeof(*h), GFP_KERNEL);
|
|
|
- if (!h)
|
|
|
- return -ENOMEM;
|
|
|
-
|
|
|
- hwh->context = h;
|
|
|
- h->timeout = timeout;
|
|
|
- h->lun = UNINITIALIZED_LUN;
|
|
|
- INIT_WORK(&h->work, service_wkq);
|
|
|
- DMWARN("using RDAC command with timeout %u", h->timeout);
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static void rdac_destroy(struct hw_handler *hwh)
|
|
|
-{
|
|
|
- struct rdac_handler *h = hwh->context;
|
|
|
-
|
|
|
- if (h->ctlr)
|
|
|
- kref_put(&h->ctlr->kref, release_ctlr);
|
|
|
- kfree(h);
|
|
|
- hwh->context = NULL;
|
|
|
-}
|
|
|
-
|
|
|
-static unsigned rdac_error(struct hw_handler *hwh, struct bio *bio)
|
|
|
-{
|
|
|
- /* Try default handler */
|
|
|
- return dm_scsi_err_handler(hwh, bio);
|
|
|
-}
|
|
|
-
|
|
|
-static void rdac_pg_init(struct hw_handler *hwh, unsigned bypassed,
|
|
|
- struct dm_path *path)
|
|
|
-{
|
|
|
- struct rdac_handler *h = hwh->context;
|
|
|
-
|
|
|
- h->path = path;
|
|
|
- switch (h->lun) {
|
|
|
- case UNINITIALIZED_LUN:
|
|
|
- submit_inquiry(h, 0xC8, sizeof(struct c8_inquiry), c8_endio);
|
|
|
- break;
|
|
|
- default:
|
|
|
- submit_inquiry(h, 0xC9, sizeof(struct c9_inquiry), c9_endio);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static struct hw_handler_type rdac_handler = {
|
|
|
- .name = RDAC_DM_HWH_NAME,
|
|
|
- .module = THIS_MODULE,
|
|
|
- .create = rdac_create,
|
|
|
- .destroy = rdac_destroy,
|
|
|
- .pg_init = rdac_pg_init,
|
|
|
- .error = rdac_error,
|
|
|
-};
|
|
|
-
|
|
|
-static int __init rdac_init(void)
|
|
|
-{
|
|
|
- int r;
|
|
|
-
|
|
|
- rdac_wkqd = create_singlethread_workqueue("rdac_wkqd");
|
|
|
- if (!rdac_wkqd) {
|
|
|
- DMERR("Failed to create workqueue rdac_wkqd.");
|
|
|
- return -ENOMEM;
|
|
|
- }
|
|
|
-
|
|
|
- r = dm_register_hw_handler(&rdac_handler);
|
|
|
- if (r < 0) {
|
|
|
- DMERR("%s: register failed %d", RDAC_DM_HWH_NAME, r);
|
|
|
- destroy_workqueue(rdac_wkqd);
|
|
|
- return r;
|
|
|
- }
|
|
|
-
|
|
|
- DMINFO("%s: version %s loaded", RDAC_DM_HWH_NAME, RDAC_DM_HWH_VER);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static void __exit rdac_exit(void)
|
|
|
-{
|
|
|
- int r = dm_unregister_hw_handler(&rdac_handler);
|
|
|
-
|
|
|
- destroy_workqueue(rdac_wkqd);
|
|
|
- if (r < 0)
|
|
|
- DMERR("%s: unregister failed %d", RDAC_DM_HWH_NAME, r);
|
|
|
-}
|
|
|
-
|
|
|
-module_init(rdac_init);
|
|
|
-module_exit(rdac_exit);
|
|
|
-
|
|
|
-MODULE_DESCRIPTION("DM Multipath LSI/Engenio RDAC support");
|
|
|
-MODULE_AUTHOR("Mike Christie, Chandra Seetharaman");
|
|
|
-MODULE_LICENSE("GPL");
|
|
|
-MODULE_VERSION(RDAC_DM_HWH_VER);
|
Chandra Seetharaman