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![Colin Ian King](/assets/img/avatar_default.png)
Trivial fix to spelling mistake in message text Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
1702 lines
44 KiB
C
1702 lines
44 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* tape device discipline for 3590 tapes.
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*
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* Copyright IBM Corp. 2001, 2009
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* Author(s): Stefan Bader <shbader@de.ibm.com>
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* Michael Holzheu <holzheu@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#define KMSG_COMPONENT "tape_3590"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/bio.h>
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#include <asm/ebcdic.h>
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#define TAPE_DBF_AREA tape_3590_dbf
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#define BUFSIZE 512 /* size of buffers for dynamic generated messages */
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#include "tape.h"
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#include "tape_std.h"
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#include "tape_3590.h"
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static struct workqueue_struct *tape_3590_wq;
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/*
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* Pointer to debug area.
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*/
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debug_info_t *TAPE_DBF_AREA = NULL;
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EXPORT_SYMBOL(TAPE_DBF_AREA);
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/*******************************************************************
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* Error Recovery functions:
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* - Read Opposite: implemented
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* - Read Device (buffered) log: BRA
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* - Read Library log: BRA
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* - Swap Devices: BRA
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* - Long Busy: implemented
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* - Special Intercept: BRA
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* - Read Alternate: implemented
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*******************************************************************/
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static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = {
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[0x00] = "",
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[0x10] = "Lost Sense",
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[0x11] = "Assigned Elsewhere",
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[0x12] = "Allegiance Reset",
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[0x13] = "Shared Access Violation",
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[0x20] = "Command Reject",
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[0x21] = "Configuration Error",
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[0x22] = "Protection Exception",
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[0x23] = "Write Protect",
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[0x24] = "Write Length",
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[0x25] = "Read-Only Format",
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[0x31] = "Beginning of Partition",
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[0x33] = "End of Partition",
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[0x34] = "End of Data",
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[0x35] = "Block not found",
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[0x40] = "Device Intervention",
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[0x41] = "Loader Intervention",
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[0x42] = "Library Intervention",
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[0x50] = "Write Error",
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[0x51] = "Erase Error",
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[0x52] = "Formatting Error",
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[0x53] = "Read Error",
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[0x54] = "Unsupported Format",
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[0x55] = "No Formatting",
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[0x56] = "Positioning lost",
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[0x57] = "Read Length",
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[0x60] = "Unsupported Medium",
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[0x61] = "Medium Length Error",
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[0x62] = "Medium removed",
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[0x64] = "Load Check",
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[0x65] = "Unload Check",
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[0x70] = "Equipment Check",
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[0x71] = "Bus out Check",
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[0x72] = "Protocol Error",
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[0x73] = "Interface Error",
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[0x74] = "Overrun",
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[0x75] = "Halt Signal",
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[0x90] = "Device fenced",
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[0x91] = "Device Path fenced",
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[0xa0] = "Volume misplaced",
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[0xa1] = "Volume inaccessible",
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[0xa2] = "Volume in input",
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[0xa3] = "Volume ejected",
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[0xa4] = "All categories reserved",
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[0xa5] = "Duplicate Volume",
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[0xa6] = "Library Manager Offline",
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[0xa7] = "Library Output Station full",
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[0xa8] = "Vision System non-operational",
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[0xa9] = "Library Manager Equipment Check",
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[0xaa] = "Library Equipment Check",
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[0xab] = "All Library Cells full",
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[0xac] = "No Cleaner Volumes in Library",
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[0xad] = "I/O Station door open",
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[0xae] = "Subsystem environmental alert",
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};
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static int crypt_supported(struct tape_device *device)
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{
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return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device));
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}
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static int crypt_enabled(struct tape_device *device)
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{
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return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device));
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}
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static void ext_to_int_kekl(struct tape390_kekl *in,
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struct tape3592_kekl *out)
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{
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int len;
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memset(out, 0, sizeof(*out));
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if (in->type == TAPE390_KEKL_TYPE_HASH)
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out->flags |= 0x40;
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if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH)
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out->flags |= 0x80;
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len = min(sizeof(out->label), strlen(in->label));
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memcpy(out->label, in->label, len);
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memset(out->label + len, ' ', sizeof(out->label) - len);
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ASCEBC(out->label, sizeof(out->label));
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}
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static void int_to_ext_kekl(struct tape3592_kekl *in,
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struct tape390_kekl *out)
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{
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memset(out, 0, sizeof(*out));
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if(in->flags & 0x40)
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out->type = TAPE390_KEKL_TYPE_HASH;
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else
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out->type = TAPE390_KEKL_TYPE_LABEL;
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if(in->flags & 0x80)
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out->type_on_tape = TAPE390_KEKL_TYPE_HASH;
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else
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out->type_on_tape = TAPE390_KEKL_TYPE_LABEL;
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memcpy(out->label, in->label, sizeof(in->label));
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EBCASC(out->label, sizeof(in->label));
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strim(out->label);
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}
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static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in,
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struct tape390_kekl_pair *out)
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{
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if (in->count == 0) {
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out->kekl[0].type = TAPE390_KEKL_TYPE_NONE;
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out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE;
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out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;
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out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;
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} else if (in->count == 1) {
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int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
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out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;
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out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;
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} else if (in->count == 2) {
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int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
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int_to_ext_kekl(&in->kekl[1], &out->kekl[1]);
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} else {
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printk("Invalid KEKL number: %d\n", in->count);
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BUG();
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}
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}
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static int check_ext_kekl(struct tape390_kekl *kekl)
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{
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if (kekl->type == TAPE390_KEKL_TYPE_NONE)
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goto invalid;
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if (kekl->type > TAPE390_KEKL_TYPE_HASH)
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goto invalid;
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if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE)
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goto invalid;
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if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH)
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goto invalid;
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if ((kekl->type == TAPE390_KEKL_TYPE_HASH) &&
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(kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL))
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goto invalid;
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return 0;
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invalid:
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return -EINVAL;
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}
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static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls)
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{
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if (check_ext_kekl(&kekls->kekl[0]))
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goto invalid;
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if (check_ext_kekl(&kekls->kekl[1]))
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goto invalid;
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return 0;
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invalid:
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return -EINVAL;
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}
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/*
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* Query KEKLs
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*/
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static int tape_3592_kekl_query(struct tape_device *device,
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struct tape390_kekl_pair *ext_kekls)
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{
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struct tape_request *request;
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struct tape3592_kekl_query_order *order;
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struct tape3592_kekl_query_data *int_kekls;
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int rc;
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DBF_EVENT(6, "tape3592_kekl_query\n");
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int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA);
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if (!int_kekls)
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return -ENOMEM;
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request = tape_alloc_request(2, sizeof(*order));
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if (IS_ERR(request)) {
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rc = PTR_ERR(request);
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goto fail_malloc;
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}
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order = request->cpdata;
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memset(order,0,sizeof(*order));
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order->code = 0xe2;
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order->max_count = 2;
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request->op = TO_KEKL_QUERY;
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tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
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tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls),
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int_kekls);
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rc = tape_do_io(device, request);
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if (rc)
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goto fail_request;
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int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls);
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rc = 0;
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fail_request:
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tape_free_request(request);
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fail_malloc:
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kfree(int_kekls);
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return rc;
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}
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/*
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* IOCTL: Query KEKLs
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*/
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static int tape_3592_ioctl_kekl_query(struct tape_device *device,
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unsigned long arg)
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{
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int rc;
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struct tape390_kekl_pair *ext_kekls;
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DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n");
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if (!crypt_supported(device))
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return -ENOSYS;
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if (!crypt_enabled(device))
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return -EUNATCH;
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ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL);
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if (!ext_kekls)
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return -ENOMEM;
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rc = tape_3592_kekl_query(device, ext_kekls);
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if (rc != 0)
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goto fail;
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if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) {
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rc = -EFAULT;
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goto fail;
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}
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rc = 0;
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fail:
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kfree(ext_kekls);
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return rc;
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}
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static int tape_3590_mttell(struct tape_device *device, int mt_count);
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/*
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* Set KEKLs
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*/
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static int tape_3592_kekl_set(struct tape_device *device,
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struct tape390_kekl_pair *ext_kekls)
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{
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struct tape_request *request;
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struct tape3592_kekl_set_order *order;
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DBF_EVENT(6, "tape3592_kekl_set\n");
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if (check_ext_kekl_pair(ext_kekls)) {
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DBF_EVENT(6, "invalid kekls\n");
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return -EINVAL;
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}
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if (tape_3590_mttell(device, 0) != 0)
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return -EBADSLT;
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request = tape_alloc_request(1, sizeof(*order));
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if (IS_ERR(request))
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return PTR_ERR(request);
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order = request->cpdata;
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memset(order, 0, sizeof(*order));
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order->code = 0xe3;
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order->kekls.count = 2;
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ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]);
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ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]);
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request->op = TO_KEKL_SET;
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tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
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return tape_do_io_free(device, request);
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}
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/*
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* IOCTL: Set KEKLs
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*/
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static int tape_3592_ioctl_kekl_set(struct tape_device *device,
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unsigned long arg)
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{
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int rc;
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struct tape390_kekl_pair *ext_kekls;
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DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n");
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if (!crypt_supported(device))
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return -ENOSYS;
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if (!crypt_enabled(device))
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return -EUNATCH;
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ext_kekls = memdup_user((char __user *)arg, sizeof(*ext_kekls));
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if (IS_ERR(ext_kekls))
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return PTR_ERR(ext_kekls);
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rc = tape_3592_kekl_set(device, ext_kekls);
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kfree(ext_kekls);
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return rc;
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}
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/*
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* Enable encryption
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*/
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static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device)
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{
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struct tape_request *request;
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char *data;
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DBF_EVENT(6, "tape_3592_enable_crypt\n");
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if (!crypt_supported(device))
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return ERR_PTR(-ENOSYS);
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request = tape_alloc_request(2, 72);
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if (IS_ERR(request))
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return request;
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data = request->cpdata;
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memset(data,0,72);
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data[0] = 0x05;
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data[36 + 0] = 0x03;
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data[36 + 1] = 0x03;
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data[36 + 4] = 0x40;
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data[36 + 6] = 0x01;
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data[36 + 14] = 0x2f;
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data[36 + 18] = 0xc3;
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data[36 + 35] = 0x72;
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request->op = TO_CRYPT_ON;
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tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
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tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
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return request;
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}
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static int tape_3592_enable_crypt(struct tape_device *device)
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{
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struct tape_request *request;
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request = __tape_3592_enable_crypt(device);
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if (IS_ERR(request))
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return PTR_ERR(request);
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return tape_do_io_free(device, request);
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}
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static void tape_3592_enable_crypt_async(struct tape_device *device)
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{
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struct tape_request *request;
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request = __tape_3592_enable_crypt(device);
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if (!IS_ERR(request))
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tape_do_io_async_free(device, request);
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}
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/*
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* Disable encryption
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*/
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static struct tape_request *__tape_3592_disable_crypt(struct tape_device *device)
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{
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struct tape_request *request;
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char *data;
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DBF_EVENT(6, "tape_3592_disable_crypt\n");
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if (!crypt_supported(device))
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return ERR_PTR(-ENOSYS);
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request = tape_alloc_request(2, 72);
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if (IS_ERR(request))
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return request;
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data = request->cpdata;
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memset(data,0,72);
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|
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data[0] = 0x05;
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data[36 + 0] = 0x03;
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data[36 + 1] = 0x03;
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data[36 + 35] = 0x32;
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|
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request->op = TO_CRYPT_OFF;
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tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
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tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
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|
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return request;
|
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}
|
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|
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static int tape_3592_disable_crypt(struct tape_device *device)
|
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{
|
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struct tape_request *request;
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|
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request = __tape_3592_disable_crypt(device);
|
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if (IS_ERR(request))
|
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return PTR_ERR(request);
|
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return tape_do_io_free(device, request);
|
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}
|
|
|
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static void tape_3592_disable_crypt_async(struct tape_device *device)
|
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{
|
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struct tape_request *request;
|
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|
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request = __tape_3592_disable_crypt(device);
|
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if (!IS_ERR(request))
|
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tape_do_io_async_free(device, request);
|
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}
|
|
|
|
/*
|
|
* IOCTL: Set encryption status
|
|
*/
|
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static int tape_3592_ioctl_crypt_set(struct tape_device *device,
|
|
unsigned long arg)
|
|
{
|
|
struct tape390_crypt_info info;
|
|
|
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DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n");
|
|
if (!crypt_supported(device))
|
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return -ENOSYS;
|
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if (copy_from_user(&info, (char __user *)arg, sizeof(info)))
|
|
return -EFAULT;
|
|
if (info.status & ~TAPE390_CRYPT_ON_MASK)
|
|
return -EINVAL;
|
|
if (info.status & TAPE390_CRYPT_ON_MASK)
|
|
return tape_3592_enable_crypt(device);
|
|
else
|
|
return tape_3592_disable_crypt(device);
|
|
}
|
|
|
|
static int tape_3590_sense_medium(struct tape_device *device);
|
|
|
|
/*
|
|
* IOCTL: Query enryption status
|
|
*/
|
|
static int tape_3592_ioctl_crypt_query(struct tape_device *device,
|
|
unsigned long arg)
|
|
{
|
|
DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n");
|
|
if (!crypt_supported(device))
|
|
return -ENOSYS;
|
|
tape_3590_sense_medium(device);
|
|
if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device),
|
|
sizeof(TAPE_3590_CRYPT_INFO(device))))
|
|
return -EFAULT;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 3590 IOCTL Overload
|
|
*/
|
|
static int
|
|
tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
case TAPE390_DISPLAY: {
|
|
struct display_struct disp;
|
|
|
|
if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)))
|
|
return -EFAULT;
|
|
|
|
return tape_std_display(device, &disp);
|
|
}
|
|
case TAPE390_KEKL_SET:
|
|
return tape_3592_ioctl_kekl_set(device, arg);
|
|
case TAPE390_KEKL_QUERY:
|
|
return tape_3592_ioctl_kekl_query(device, arg);
|
|
case TAPE390_CRYPT_SET:
|
|
return tape_3592_ioctl_crypt_set(device, arg);
|
|
case TAPE390_CRYPT_QUERY:
|
|
return tape_3592_ioctl_crypt_query(device, arg);
|
|
default:
|
|
return -EINVAL; /* no additional ioctls */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* SENSE Medium: Get Sense data about medium state
|
|
*/
|
|
static int tape_3590_sense_medium(struct tape_device *device)
|
|
{
|
|
struct tape_request *request;
|
|
|
|
request = tape_alloc_request(1, 128);
|
|
if (IS_ERR(request))
|
|
return PTR_ERR(request);
|
|
request->op = TO_MSEN;
|
|
tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
|
|
return tape_do_io_free(device, request);
|
|
}
|
|
|
|
static void tape_3590_sense_medium_async(struct tape_device *device)
|
|
{
|
|
struct tape_request *request;
|
|
|
|
request = tape_alloc_request(1, 128);
|
|
if (IS_ERR(request))
|
|
return;
|
|
request->op = TO_MSEN;
|
|
tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
|
|
tape_do_io_async_free(device, request);
|
|
}
|
|
|
|
/*
|
|
* MTTELL: Tell block. Return the number of block relative to current file.
|
|
*/
|
|
static int
|
|
tape_3590_mttell(struct tape_device *device, int mt_count)
|
|
{
|
|
__u64 block_id;
|
|
int rc;
|
|
|
|
rc = tape_std_read_block_id(device, &block_id);
|
|
if (rc)
|
|
return rc;
|
|
return block_id >> 32;
|
|
}
|
|
|
|
/*
|
|
* MTSEEK: seek to the specified block.
|
|
*/
|
|
static int
|
|
tape_3590_mtseek(struct tape_device *device, int count)
|
|
{
|
|
struct tape_request *request;
|
|
|
|
DBF_EVENT(6, "xsee id: %x\n", count);
|
|
request = tape_alloc_request(3, 4);
|
|
if (IS_ERR(request))
|
|
return PTR_ERR(request);
|
|
request->op = TO_LBL;
|
|
tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
|
|
*(__u32 *) request->cpdata = count;
|
|
tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
|
|
tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
|
|
return tape_do_io_free(device, request);
|
|
}
|
|
|
|
/*
|
|
* Read Opposite Error Recovery Function:
|
|
* Used, when Read Forward does not work
|
|
*/
|
|
static void
|
|
tape_3590_read_opposite(struct tape_device *device,
|
|
struct tape_request *request)
|
|
{
|
|
struct tape_3590_disc_data *data;
|
|
|
|
/*
|
|
* We have allocated 4 ccws in tape_std_read, so we can now
|
|
* transform the request to a read backward, followed by a
|
|
* forward space block.
|
|
*/
|
|
request->op = TO_RBA;
|
|
tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
|
|
data = device->discdata;
|
|
tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,
|
|
device->char_data.idal_buf);
|
|
tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
|
|
tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
|
|
DBF_EVENT(6, "xrop ccwg\n");
|
|
}
|
|
|
|
/*
|
|
* Read Attention Msg
|
|
* This should be done after an interrupt with attention bit (0x80)
|
|
* in device state.
|
|
*
|
|
* After a "read attention message" request there are two possible
|
|
* results:
|
|
*
|
|
* 1. A unit check is presented, when attention sense is present (e.g. when
|
|
* a medium has been unloaded). The attention sense comes then
|
|
* together with the unit check. The recovery action is either "retry"
|
|
* (in case there is an attention message pending) or "permanent error".
|
|
*
|
|
* 2. The attention msg is written to the "read subsystem data" buffer.
|
|
* In this case we probably should print it to the console.
|
|
*/
|
|
static void tape_3590_read_attmsg_async(struct tape_device *device)
|
|
{
|
|
struct tape_request *request;
|
|
char *buf;
|
|
|
|
request = tape_alloc_request(3, 4096);
|
|
if (IS_ERR(request))
|
|
return;
|
|
request->op = TO_READ_ATTMSG;
|
|
buf = request->cpdata;
|
|
buf[0] = PREP_RD_SS_DATA;
|
|
buf[6] = RD_ATTMSG; /* read att msg */
|
|
tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf);
|
|
tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12);
|
|
tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
|
|
tape_do_io_async_free(device, request);
|
|
}
|
|
|
|
/*
|
|
* These functions are used to schedule follow-up actions from within an
|
|
* interrupt context (like unsolicited interrupts).
|
|
* Note: the work handler is called by the system work queue. The tape
|
|
* commands started by the handler need to be asynchrounous, otherwise
|
|
* a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq).
|
|
*/
|
|
struct work_handler_data {
|
|
struct tape_device *device;
|
|
enum tape_op op;
|
|
struct work_struct work;
|
|
};
|
|
|
|
static void
|
|
tape_3590_work_handler(struct work_struct *work)
|
|
{
|
|
struct work_handler_data *p =
|
|
container_of(work, struct work_handler_data, work);
|
|
|
|
switch (p->op) {
|
|
case TO_MSEN:
|
|
tape_3590_sense_medium_async(p->device);
|
|
break;
|
|
case TO_READ_ATTMSG:
|
|
tape_3590_read_attmsg_async(p->device);
|
|
break;
|
|
case TO_CRYPT_ON:
|
|
tape_3592_enable_crypt_async(p->device);
|
|
break;
|
|
case TO_CRYPT_OFF:
|
|
tape_3592_disable_crypt_async(p->device);
|
|
break;
|
|
default:
|
|
DBF_EVENT(3, "T3590: work handler undefined for "
|
|
"operation 0x%02x\n", p->op);
|
|
}
|
|
tape_put_device(p->device);
|
|
kfree(p);
|
|
}
|
|
|
|
static int
|
|
tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
|
|
{
|
|
struct work_handler_data *p;
|
|
|
|
if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
|
|
return -ENOMEM;
|
|
|
|
INIT_WORK(&p->work, tape_3590_work_handler);
|
|
|
|
p->device = tape_get_device(device);
|
|
p->op = op;
|
|
|
|
queue_work(tape_3590_wq, &p->work);
|
|
return 0;
|
|
}
|
|
|
|
static void tape_3590_med_state_set(struct tape_device *device,
|
|
struct tape_3590_med_sense *sense)
|
|
{
|
|
struct tape390_crypt_info *c_info;
|
|
|
|
c_info = &TAPE_3590_CRYPT_INFO(device);
|
|
|
|
DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst);
|
|
switch (sense->macst) {
|
|
case 0x04:
|
|
case 0x05:
|
|
case 0x06:
|
|
tape_med_state_set(device, MS_UNLOADED);
|
|
TAPE_3590_CRYPT_INFO(device).medium_status = 0;
|
|
return;
|
|
case 0x08:
|
|
case 0x09:
|
|
tape_med_state_set(device, MS_LOADED);
|
|
break;
|
|
default:
|
|
tape_med_state_set(device, MS_UNKNOWN);
|
|
return;
|
|
}
|
|
c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK;
|
|
if (sense->flags & MSENSE_CRYPT_MASK) {
|
|
DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags);
|
|
c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK;
|
|
} else {
|
|
DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags);
|
|
c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The done handler is called at device/channel end and wakes up the sleeping
|
|
* process
|
|
*/
|
|
static int
|
|
tape_3590_done(struct tape_device *device, struct tape_request *request)
|
|
{
|
|
|
|
DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
|
|
|
|
switch (request->op) {
|
|
case TO_BSB:
|
|
case TO_BSF:
|
|
case TO_DSE:
|
|
case TO_FSB:
|
|
case TO_FSF:
|
|
case TO_LBL:
|
|
case TO_RFO:
|
|
case TO_RBA:
|
|
case TO_REW:
|
|
case TO_WRI:
|
|
case TO_WTM:
|
|
case TO_BLOCK:
|
|
case TO_LOAD:
|
|
tape_med_state_set(device, MS_LOADED);
|
|
break;
|
|
case TO_RUN:
|
|
tape_med_state_set(device, MS_UNLOADED);
|
|
tape_3590_schedule_work(device, TO_CRYPT_OFF);
|
|
break;
|
|
case TO_MSEN:
|
|
tape_3590_med_state_set(device, request->cpdata);
|
|
break;
|
|
case TO_CRYPT_ON:
|
|
TAPE_3590_CRYPT_INFO(device).status
|
|
|= TAPE390_CRYPT_ON_MASK;
|
|
*(device->modeset_byte) |= 0x03;
|
|
break;
|
|
case TO_CRYPT_OFF:
|
|
TAPE_3590_CRYPT_INFO(device).status
|
|
&= ~TAPE390_CRYPT_ON_MASK;
|
|
*(device->modeset_byte) &= ~0x03;
|
|
break;
|
|
case TO_RBI: /* RBI seems to succeed even without medium loaded. */
|
|
case TO_NOP: /* Same to NOP. */
|
|
case TO_READ_CONFIG:
|
|
case TO_READ_ATTMSG:
|
|
case TO_DIS:
|
|
case TO_ASSIGN:
|
|
case TO_UNASSIGN:
|
|
case TO_SIZE:
|
|
case TO_KEKL_SET:
|
|
case TO_KEKL_QUERY:
|
|
case TO_RDC:
|
|
break;
|
|
}
|
|
return TAPE_IO_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* This function is called, when error recovery was successful
|
|
*/
|
|
static inline int
|
|
tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
|
|
{
|
|
DBF_EVENT(3, "Error Recovery successful for %s\n",
|
|
tape_op_verbose[request->op]);
|
|
return tape_3590_done(device, request);
|
|
}
|
|
|
|
/*
|
|
* This function is called, when error recovery was not successful
|
|
*/
|
|
static inline int
|
|
tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
|
|
struct irb *irb, int rc)
|
|
{
|
|
DBF_EVENT(3, "Error Recovery failed for %s\n",
|
|
tape_op_verbose[request->op]);
|
|
tape_dump_sense_dbf(device, request, irb);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Error Recovery do retry
|
|
*/
|
|
static inline int
|
|
tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
|
|
struct irb *irb)
|
|
{
|
|
DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
|
|
tape_dump_sense_dbf(device, request, irb);
|
|
return TAPE_IO_RETRY;
|
|
}
|
|
|
|
/*
|
|
* Handle unsolicited interrupts
|
|
*/
|
|
static int
|
|
tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
|
|
{
|
|
if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END)
|
|
/* Probably result of halt ssch */
|
|
return TAPE_IO_PENDING;
|
|
else if (irb->scsw.cmd.dstat == 0x85)
|
|
/* Device Ready */
|
|
DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id);
|
|
else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
|
|
tape_3590_schedule_work(device, TO_READ_ATTMSG);
|
|
} else {
|
|
DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
|
|
tape_dump_sense_dbf(device, NULL, irb);
|
|
}
|
|
/* check medium state */
|
|
tape_3590_schedule_work(device, TO_MSEN);
|
|
return TAPE_IO_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Basic Recovery routine
|
|
*/
|
|
static int
|
|
tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
|
|
struct irb *irb, int rc)
|
|
{
|
|
struct tape_3590_sense *sense;
|
|
|
|
sense = (struct tape_3590_sense *) irb->ecw;
|
|
|
|
switch (sense->bra) {
|
|
case SENSE_BRA_PER:
|
|
return tape_3590_erp_failed(device, request, irb, rc);
|
|
case SENSE_BRA_CONT:
|
|
return tape_3590_erp_succeded(device, request);
|
|
case SENSE_BRA_RE:
|
|
return tape_3590_erp_retry(device, request, irb);
|
|
case SENSE_BRA_DRE:
|
|
return tape_3590_erp_failed(device, request, irb, rc);
|
|
default:
|
|
BUG();
|
|
return TAPE_IO_STOP;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* RDL: Read Device (buffered) log
|
|
*/
|
|
static int
|
|
tape_3590_erp_read_buf_log(struct tape_device *device,
|
|
struct tape_request *request, struct irb *irb)
|
|
{
|
|
/*
|
|
* We just do the basic error recovery at the moment (retry).
|
|
* Perhaps in the future, we read the log and dump it somewhere...
|
|
*/
|
|
return tape_3590_erp_basic(device, request, irb, -EIO);
|
|
}
|
|
|
|
/*
|
|
* SWAP: Swap Devices
|
|
*/
|
|
static int
|
|
tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
|
|
struct irb *irb)
|
|
{
|
|
/*
|
|
* This error recovery should swap the tapes
|
|
* if the original has a problem. The operation
|
|
* should proceed with the new tape... this
|
|
* should probably be done in user space!
|
|
*/
|
|
dev_warn (&device->cdev->dev, "The tape medium must be loaded into a "
|
|
"different tape unit\n");
|
|
return tape_3590_erp_basic(device, request, irb, -EIO);
|
|
}
|
|
|
|
/*
|
|
* LBY: Long Busy
|
|
*/
|
|
static int
|
|
tape_3590_erp_long_busy(struct tape_device *device,
|
|
struct tape_request *request, struct irb *irb)
|
|
{
|
|
DBF_EVENT(6, "Device is busy\n");
|
|
return TAPE_IO_LONG_BUSY;
|
|
}
|
|
|
|
/*
|
|
* SPI: Special Intercept
|
|
*/
|
|
static int
|
|
tape_3590_erp_special_interrupt(struct tape_device *device,
|
|
struct tape_request *request, struct irb *irb)
|
|
{
|
|
return tape_3590_erp_basic(device, request, irb, -EIO);
|
|
}
|
|
|
|
/*
|
|
* RDA: Read Alternate
|
|
*/
|
|
static int
|
|
tape_3590_erp_read_alternate(struct tape_device *device,
|
|
struct tape_request *request, struct irb *irb)
|
|
{
|
|
struct tape_3590_disc_data *data;
|
|
|
|
/*
|
|
* The issued Read Backward or Read Previous command is not
|
|
* supported by the device
|
|
* The recovery action should be to issue another command:
|
|
* Read Revious: if Read Backward is not supported
|
|
* Read Backward: if Read Previous is not supported
|
|
*/
|
|
data = device->discdata;
|
|
if (data->read_back_op == READ_PREVIOUS) {
|
|
DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
|
|
device->cdev_id);
|
|
data->read_back_op = READ_BACKWARD;
|
|
} else {
|
|
DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
|
|
device->cdev_id);
|
|
data->read_back_op = READ_PREVIOUS;
|
|
}
|
|
tape_3590_read_opposite(device, request);
|
|
return tape_3590_erp_retry(device, request, irb);
|
|
}
|
|
|
|
/*
|
|
* Error Recovery read opposite
|
|
*/
|
|
static int
|
|
tape_3590_erp_read_opposite(struct tape_device *device,
|
|
struct tape_request *request, struct irb *irb)
|
|
{
|
|
switch (request->op) {
|
|
case TO_RFO:
|
|
/*
|
|
* We did read forward, but the data could not be read.
|
|
* We will read backward and then skip forward again.
|
|
*/
|
|
tape_3590_read_opposite(device, request);
|
|
return tape_3590_erp_retry(device, request, irb);
|
|
case TO_RBA:
|
|
/* We tried to read forward and backward, but hat no success */
|
|
return tape_3590_erp_failed(device, request, irb, -EIO);
|
|
break;
|
|
default:
|
|
return tape_3590_erp_failed(device, request, irb, -EIO);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print an MIM (Media Information Message) (message code f0)
|
|
*/
|
|
static void
|
|
tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
|
|
{
|
|
struct tape_3590_sense *sense;
|
|
char *exception, *service;
|
|
|
|
exception = kmalloc(BUFSIZE, GFP_ATOMIC);
|
|
service = kmalloc(BUFSIZE, GFP_ATOMIC);
|
|
|
|
if (!exception || !service)
|
|
goto out_nomem;
|
|
|
|
sense = (struct tape_3590_sense *) irb->ecw;
|
|
/* Exception Message */
|
|
switch (sense->fmt.f70.emc) {
|
|
case 0x02:
|
|
snprintf(exception, BUFSIZE, "Data degraded");
|
|
break;
|
|
case 0x03:
|
|
snprintf(exception, BUFSIZE, "Data degraded in partition %i",
|
|
sense->fmt.f70.mp);
|
|
break;
|
|
case 0x04:
|
|
snprintf(exception, BUFSIZE, "Medium degraded");
|
|
break;
|
|
case 0x05:
|
|
snprintf(exception, BUFSIZE, "Medium degraded in partition %i",
|
|
sense->fmt.f70.mp);
|
|
break;
|
|
case 0x06:
|
|
snprintf(exception, BUFSIZE, "Block 0 Error");
|
|
break;
|
|
case 0x07:
|
|
snprintf(exception, BUFSIZE, "Medium Exception 0x%02x",
|
|
sense->fmt.f70.md);
|
|
break;
|
|
default:
|
|
snprintf(exception, BUFSIZE, "0x%02x",
|
|
sense->fmt.f70.emc);
|
|
break;
|
|
}
|
|
/* Service Message */
|
|
switch (sense->fmt.f70.smc) {
|
|
case 0x02:
|
|
snprintf(service, BUFSIZE, "Reference Media maintenance "
|
|
"procedure %i", sense->fmt.f70.md);
|
|
break;
|
|
default:
|
|
snprintf(service, BUFSIZE, "0x%02x",
|
|
sense->fmt.f70.smc);
|
|
break;
|
|
}
|
|
|
|
dev_warn (&device->cdev->dev, "Tape media information: exception %s, "
|
|
"service %s\n", exception, service);
|
|
|
|
out_nomem:
|
|
kfree(exception);
|
|
kfree(service);
|
|
}
|
|
|
|
/*
|
|
* Print an I/O Subsystem Service Information Message (message code f1)
|
|
*/
|
|
static void
|
|
tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
|
|
{
|
|
struct tape_3590_sense *sense;
|
|
char *exception, *service;
|
|
|
|
exception = kmalloc(BUFSIZE, GFP_ATOMIC);
|
|
service = kmalloc(BUFSIZE, GFP_ATOMIC);
|
|
|
|
if (!exception || !service)
|
|
goto out_nomem;
|
|
|
|
sense = (struct tape_3590_sense *) irb->ecw;
|
|
/* Exception Message */
|
|
switch (sense->fmt.f71.emc) {
|
|
case 0x01:
|
|
snprintf(exception, BUFSIZE, "Effect of failure is unknown");
|
|
break;
|
|
case 0x02:
|
|
snprintf(exception, BUFSIZE, "CU Exception - no performance "
|
|
"impact");
|
|
break;
|
|
case 0x03:
|
|
snprintf(exception, BUFSIZE, "CU Exception on channel "
|
|
"interface 0x%02x", sense->fmt.f71.md[0]);
|
|
break;
|
|
case 0x04:
|
|
snprintf(exception, BUFSIZE, "CU Exception on device path "
|
|
"0x%02x", sense->fmt.f71.md[0]);
|
|
break;
|
|
case 0x05:
|
|
snprintf(exception, BUFSIZE, "CU Exception on library path "
|
|
"0x%02x", sense->fmt.f71.md[0]);
|
|
break;
|
|
case 0x06:
|
|
snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x",
|
|
sense->fmt.f71.md[0]);
|
|
break;
|
|
case 0x07:
|
|
snprintf(exception, BUFSIZE, "CU Exception on partition "
|
|
"0x%02x", sense->fmt.f71.md[0]);
|
|
break;
|
|
default:
|
|
snprintf(exception, BUFSIZE, "0x%02x",
|
|
sense->fmt.f71.emc);
|
|
}
|
|
/* Service Message */
|
|
switch (sense->fmt.f71.smc) {
|
|
case 0x01:
|
|
snprintf(service, BUFSIZE, "Repair impact is unknown");
|
|
break;
|
|
case 0x02:
|
|
snprintf(service, BUFSIZE, "Repair will not impact cu "
|
|
"performance");
|
|
break;
|
|
case 0x03:
|
|
if (sense->fmt.f71.mdf == 0)
|
|
snprintf(service, BUFSIZE, "Repair will disable node "
|
|
"0x%x on CU", sense->fmt.f71.md[1]);
|
|
else
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1],
|
|
sense->fmt.f71.md[2]);
|
|
break;
|
|
case 0x04:
|
|
if (sense->fmt.f71.mdf == 0)
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"channel path 0x%x on CU",
|
|
sense->fmt.f71.md[1]);
|
|
else
|
|
snprintf(service, BUFSIZE, "Repair will disable channel"
|
|
" paths (0x%x-0x%x) on CU",
|
|
sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
|
|
break;
|
|
case 0x05:
|
|
if (sense->fmt.f71.mdf == 0)
|
|
snprintf(service, BUFSIZE, "Repair will disable device"
|
|
" path 0x%x on CU", sense->fmt.f71.md[1]);
|
|
else
|
|
snprintf(service, BUFSIZE, "Repair will disable device"
|
|
" paths (0x%x-0x%x) on CU",
|
|
sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
|
|
break;
|
|
case 0x06:
|
|
if (sense->fmt.f71.mdf == 0)
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"library path 0x%x on CU",
|
|
sense->fmt.f71.md[1]);
|
|
else
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"library paths (0x%x-0x%x) on CU",
|
|
sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
|
|
break;
|
|
case 0x07:
|
|
snprintf(service, BUFSIZE, "Repair will disable access to CU");
|
|
break;
|
|
default:
|
|
snprintf(service, BUFSIZE, "0x%02x",
|
|
sense->fmt.f71.smc);
|
|
}
|
|
|
|
dev_warn (&device->cdev->dev, "I/O subsystem information: exception"
|
|
" %s, service %s\n", exception, service);
|
|
out_nomem:
|
|
kfree(exception);
|
|
kfree(service);
|
|
}
|
|
|
|
/*
|
|
* Print an Device Subsystem Service Information Message (message code f2)
|
|
*/
|
|
static void
|
|
tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
|
|
{
|
|
struct tape_3590_sense *sense;
|
|
char *exception, *service;
|
|
|
|
exception = kmalloc(BUFSIZE, GFP_ATOMIC);
|
|
service = kmalloc(BUFSIZE, GFP_ATOMIC);
|
|
|
|
if (!exception || !service)
|
|
goto out_nomem;
|
|
|
|
sense = (struct tape_3590_sense *) irb->ecw;
|
|
/* Exception Message */
|
|
switch (sense->fmt.f71.emc) {
|
|
case 0x01:
|
|
snprintf(exception, BUFSIZE, "Effect of failure is unknown");
|
|
break;
|
|
case 0x02:
|
|
snprintf(exception, BUFSIZE, "DV Exception - no performance"
|
|
" impact");
|
|
break;
|
|
case 0x03:
|
|
snprintf(exception, BUFSIZE, "DV Exception on channel "
|
|
"interface 0x%02x", sense->fmt.f71.md[0]);
|
|
break;
|
|
case 0x04:
|
|
snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x",
|
|
sense->fmt.f71.md[0]);
|
|
break;
|
|
case 0x05:
|
|
snprintf(exception, BUFSIZE, "DV Exception on message display"
|
|
" 0x%02x", sense->fmt.f71.md[0]);
|
|
break;
|
|
case 0x06:
|
|
snprintf(exception, BUFSIZE, "DV Exception in tape path");
|
|
break;
|
|
case 0x07:
|
|
snprintf(exception, BUFSIZE, "DV Exception in drive");
|
|
break;
|
|
default:
|
|
snprintf(exception, BUFSIZE, "0x%02x",
|
|
sense->fmt.f71.emc);
|
|
}
|
|
/* Service Message */
|
|
switch (sense->fmt.f71.smc) {
|
|
case 0x01:
|
|
snprintf(service, BUFSIZE, "Repair impact is unknown");
|
|
break;
|
|
case 0x02:
|
|
snprintf(service, BUFSIZE, "Repair will not impact device "
|
|
"performance");
|
|
break;
|
|
case 0x03:
|
|
if (sense->fmt.f71.mdf == 0)
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"channel path 0x%x on DV",
|
|
sense->fmt.f71.md[1]);
|
|
else
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"channel path (0x%x-0x%x) on DV",
|
|
sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
|
|
break;
|
|
case 0x04:
|
|
if (sense->fmt.f71.mdf == 0)
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"interface 0x%x on DV", sense->fmt.f71.md[1]);
|
|
else
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"interfaces (0x%x-0x%x) on DV",
|
|
sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
|
|
break;
|
|
case 0x05:
|
|
if (sense->fmt.f71.mdf == 0)
|
|
snprintf(service, BUFSIZE, "Repair will disable loader"
|
|
" 0x%x on DV", sense->fmt.f71.md[1]);
|
|
else
|
|
snprintf(service, BUFSIZE, "Repair will disable loader"
|
|
" (0x%x-0x%x) on DV",
|
|
sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
|
|
break;
|
|
case 0x07:
|
|
snprintf(service, BUFSIZE, "Repair will disable access to DV");
|
|
break;
|
|
case 0x08:
|
|
if (sense->fmt.f71.mdf == 0)
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"message display 0x%x on DV",
|
|
sense->fmt.f71.md[1]);
|
|
else
|
|
snprintf(service, BUFSIZE, "Repair will disable "
|
|
"message displays (0x%x-0x%x) on DV",
|
|
sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
|
|
break;
|
|
case 0x09:
|
|
snprintf(service, BUFSIZE, "Clean DV");
|
|
break;
|
|
default:
|
|
snprintf(service, BUFSIZE, "0x%02x",
|
|
sense->fmt.f71.smc);
|
|
}
|
|
|
|
dev_warn (&device->cdev->dev, "Device subsystem information: exception"
|
|
" %s, service %s\n", exception, service);
|
|
out_nomem:
|
|
kfree(exception);
|
|
kfree(service);
|
|
}
|
|
|
|
/*
|
|
* Print standard ERA Message
|
|
*/
|
|
static void
|
|
tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
|
|
{
|
|
struct tape_3590_sense *sense;
|
|
|
|
sense = (struct tape_3590_sense *) irb->ecw;
|
|
if (sense->mc == 0)
|
|
return;
|
|
if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
|
|
if (tape_3590_msg[sense->mc] != NULL)
|
|
dev_warn (&device->cdev->dev, "The tape unit has "
|
|
"issued sense message %s\n",
|
|
tape_3590_msg[sense->mc]);
|
|
else
|
|
dev_warn (&device->cdev->dev, "The tape unit has "
|
|
"issued an unknown sense message code 0x%x\n",
|
|
sense->mc);
|
|
return;
|
|
}
|
|
if (sense->mc == 0xf0) {
|
|
/* Standard Media Information Message */
|
|
dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, "
|
|
"RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc,
|
|
sense->fmt.f70.emc, sense->fmt.f70.smc,
|
|
sense->fmt.f70.refcode, sense->fmt.f70.mid,
|
|
sense->fmt.f70.fid);
|
|
tape_3590_print_mim_msg_f0(device, irb);
|
|
return;
|
|
}
|
|
if (sense->mc == 0xf1) {
|
|
/* Standard I/O Subsystem Service Information Message */
|
|
dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x,"
|
|
" MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
|
|
sense->fmt.f71.sev, device->cdev->id.dev_model,
|
|
sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc,
|
|
sense->fmt.f71.refcode1, sense->fmt.f71.refcode2,
|
|
sense->fmt.f71.refcode3);
|
|
tape_3590_print_io_sim_msg_f1(device, irb);
|
|
return;
|
|
}
|
|
if (sense->mc == 0xf2) {
|
|
/* Standard Device Service Information Message */
|
|
dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x"
|
|
", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
|
|
sense->fmt.f71.sev, device->cdev->id.dev_model,
|
|
sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc,
|
|
sense->fmt.f71.refcode1, sense->fmt.f71.refcode2,
|
|
sense->fmt.f71.refcode3);
|
|
tape_3590_print_dev_sim_msg_f2(device, irb);
|
|
return;
|
|
}
|
|
if (sense->mc == 0xf3) {
|
|
/* Standard Library Service Information Message */
|
|
return;
|
|
}
|
|
dev_warn (&device->cdev->dev, "The tape unit has issued an unknown "
|
|
"sense message code %x\n", sense->mc);
|
|
}
|
|
|
|
static int tape_3590_crypt_error(struct tape_device *device,
|
|
struct tape_request *request, struct irb *irb)
|
|
{
|
|
u8 cu_rc;
|
|
u16 ekm_rc2;
|
|
char *sense;
|
|
|
|
sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data;
|
|
cu_rc = sense[0];
|
|
ekm_rc2 = *((u16*) &sense[10]);
|
|
if ((cu_rc == 0) && (ekm_rc2 == 0xee31))
|
|
/* key not defined on EKM */
|
|
return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED);
|
|
if ((cu_rc == 1) || (cu_rc == 2))
|
|
/* No connection to EKM */
|
|
return tape_3590_erp_basic(device, request, irb, -ENOTCONN);
|
|
|
|
dev_err (&device->cdev->dev, "The tape unit failed to obtain the "
|
|
"encryption key from EKM\n");
|
|
|
|
return tape_3590_erp_basic(device, request, irb, -ENOKEY);
|
|
}
|
|
|
|
/*
|
|
* 3590 error Recovery routine:
|
|
* If possible, it tries to recover from the error. If this is not possible,
|
|
* inform the user about the problem.
|
|
*/
|
|
static int
|
|
tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
|
|
struct irb *irb)
|
|
{
|
|
struct tape_3590_sense *sense;
|
|
|
|
sense = (struct tape_3590_sense *) irb->ecw;
|
|
|
|
DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc);
|
|
|
|
/*
|
|
* First check all RC-QRCs where we want to do something special
|
|
* - "break": basic error recovery is done
|
|
* - "goto out:": just print error message if available
|
|
*/
|
|
switch (sense->rc_rqc) {
|
|
|
|
case 0x1110:
|
|
tape_3590_print_era_msg(device, irb);
|
|
return tape_3590_erp_read_buf_log(device, request, irb);
|
|
|
|
case 0x2011:
|
|
tape_3590_print_era_msg(device, irb);
|
|
return tape_3590_erp_read_alternate(device, request, irb);
|
|
|
|
case 0x2230:
|
|
case 0x2231:
|
|
tape_3590_print_era_msg(device, irb);
|
|
return tape_3590_erp_special_interrupt(device, request, irb);
|
|
case 0x2240:
|
|
return tape_3590_crypt_error(device, request, irb);
|
|
|
|
case 0x3010:
|
|
DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
|
|
device->cdev_id);
|
|
return tape_3590_erp_basic(device, request, irb, -ENOSPC);
|
|
case 0x3012:
|
|
DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
|
|
device->cdev_id);
|
|
return tape_3590_erp_basic(device, request, irb, -ENOSPC);
|
|
case 0x3020:
|
|
DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
|
|
return tape_3590_erp_basic(device, request, irb, -ENOSPC);
|
|
|
|
case 0x3122:
|
|
DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
|
|
device->cdev_id);
|
|
return tape_3590_erp_basic(device, request, irb, -EIO);
|
|
case 0x3123:
|
|
DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
|
|
device->cdev_id);
|
|
tape_med_state_set(device, MS_UNLOADED);
|
|
tape_3590_schedule_work(device, TO_CRYPT_OFF);
|
|
return tape_3590_erp_basic(device, request, irb, 0);
|
|
|
|
case 0x4010:
|
|
/*
|
|
* print additional msg since default msg
|
|
* "device intervention" is not very meaningfull
|
|
*/
|
|
tape_med_state_set(device, MS_UNLOADED);
|
|
tape_3590_schedule_work(device, TO_CRYPT_OFF);
|
|
return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
|
|
case 0x4012: /* Device Long Busy */
|
|
/* XXX: Also use long busy handling here? */
|
|
DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id);
|
|
tape_3590_print_era_msg(device, irb);
|
|
return tape_3590_erp_basic(device, request, irb, -EBUSY);
|
|
case 0x4014:
|
|
DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id);
|
|
return tape_3590_erp_long_busy(device, request, irb);
|
|
|
|
case 0x5010:
|
|
if (sense->rac == 0xd0) {
|
|
/* Swap */
|
|
tape_3590_print_era_msg(device, irb);
|
|
return tape_3590_erp_swap(device, request, irb);
|
|
}
|
|
if (sense->rac == 0x26) {
|
|
/* Read Opposite */
|
|
tape_3590_print_era_msg(device, irb);
|
|
return tape_3590_erp_read_opposite(device, request,
|
|
irb);
|
|
}
|
|
return tape_3590_erp_basic(device, request, irb, -EIO);
|
|
case 0x5020:
|
|
case 0x5021:
|
|
case 0x5022:
|
|
case 0x5040:
|
|
case 0x5041:
|
|
case 0x5042:
|
|
tape_3590_print_era_msg(device, irb);
|
|
return tape_3590_erp_swap(device, request, irb);
|
|
|
|
case 0x5110:
|
|
case 0x5111:
|
|
return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
|
|
|
|
case 0x5120:
|
|
case 0x1120:
|
|
tape_med_state_set(device, MS_UNLOADED);
|
|
tape_3590_schedule_work(device, TO_CRYPT_OFF);
|
|
return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
|
|
|
|
case 0x6020:
|
|
return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
|
|
|
|
case 0x8011:
|
|
return tape_3590_erp_basic(device, request, irb, -EPERM);
|
|
case 0x8013:
|
|
dev_warn (&device->cdev->dev, "A different host has privileged"
|
|
" access to the tape unit\n");
|
|
return tape_3590_erp_basic(device, request, irb, -EPERM);
|
|
default:
|
|
return tape_3590_erp_basic(device, request, irb, -EIO);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 3590 interrupt handler:
|
|
*/
|
|
static int
|
|
tape_3590_irq(struct tape_device *device, struct tape_request *request,
|
|
struct irb *irb)
|
|
{
|
|
if (request == NULL)
|
|
return tape_3590_unsolicited_irq(device, irb);
|
|
|
|
if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) &&
|
|
(irb->scsw.cmd.dstat & DEV_STAT_DEV_END) &&
|
|
(request->op == TO_WRI)) {
|
|
/* Write at end of volume */
|
|
DBF_EVENT(2, "End of volume\n");
|
|
return tape_3590_erp_failed(device, request, irb, -ENOSPC);
|
|
}
|
|
|
|
if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
|
|
return tape_3590_unit_check(device, request, irb);
|
|
|
|
if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
|
|
if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) {
|
|
if (request->op == TO_FSB || request->op == TO_BSB)
|
|
request->rescnt++;
|
|
else
|
|
DBF_EVENT(5, "Unit Exception!\n");
|
|
}
|
|
|
|
return tape_3590_done(device, request);
|
|
}
|
|
|
|
if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) {
|
|
DBF_EVENT(2, "channel end\n");
|
|
return TAPE_IO_PENDING;
|
|
}
|
|
|
|
if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
|
|
DBF_EVENT(2, "Unit Attention when busy..\n");
|
|
return TAPE_IO_PENDING;
|
|
}
|
|
|
|
DBF_EVENT(6, "xunknownirq\n");
|
|
tape_dump_sense_dbf(device, request, irb);
|
|
return TAPE_IO_STOP;
|
|
}
|
|
|
|
|
|
static int tape_3590_read_dev_chars(struct tape_device *device,
|
|
struct tape_3590_rdc_data *rdc_data)
|
|
{
|
|
int rc;
|
|
struct tape_request *request;
|
|
|
|
request = tape_alloc_request(1, sizeof(*rdc_data));
|
|
if (IS_ERR(request))
|
|
return PTR_ERR(request);
|
|
request->op = TO_RDC;
|
|
tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data),
|
|
request->cpdata);
|
|
rc = tape_do_io(device, request);
|
|
if (rc == 0)
|
|
memcpy(rdc_data, request->cpdata, sizeof(*rdc_data));
|
|
tape_free_request(request);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Setup device function
|
|
*/
|
|
static int
|
|
tape_3590_setup_device(struct tape_device *device)
|
|
{
|
|
int rc;
|
|
struct tape_3590_disc_data *data;
|
|
struct tape_3590_rdc_data *rdc_data;
|
|
|
|
DBF_EVENT(6, "3590 device setup\n");
|
|
data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA);
|
|
if (data == NULL)
|
|
return -ENOMEM;
|
|
data->read_back_op = READ_PREVIOUS;
|
|
device->discdata = data;
|
|
|
|
rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA);
|
|
if (!rdc_data) {
|
|
rc = -ENOMEM;
|
|
goto fail_kmalloc;
|
|
}
|
|
rc = tape_3590_read_dev_chars(device, rdc_data);
|
|
if (rc) {
|
|
DBF_LH(3, "Read device characteristics failed!\n");
|
|
goto fail_rdc_data;
|
|
}
|
|
rc = tape_std_assign(device);
|
|
if (rc)
|
|
goto fail_rdc_data;
|
|
if (rdc_data->data[31] == 0x13) {
|
|
data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK;
|
|
tape_3592_disable_crypt(device);
|
|
} else {
|
|
DBF_EVENT(6, "Device has NO crypto support\n");
|
|
}
|
|
/* Try to find out if medium is loaded */
|
|
rc = tape_3590_sense_medium(device);
|
|
if (rc) {
|
|
DBF_LH(3, "3590 medium sense returned %d\n", rc);
|
|
goto fail_rdc_data;
|
|
}
|
|
return 0;
|
|
|
|
fail_rdc_data:
|
|
kfree(rdc_data);
|
|
fail_kmalloc:
|
|
kfree(data);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Cleanup device function
|
|
*/
|
|
static void
|
|
tape_3590_cleanup_device(struct tape_device *device)
|
|
{
|
|
flush_workqueue(tape_3590_wq);
|
|
tape_std_unassign(device);
|
|
|
|
kfree(device->discdata);
|
|
device->discdata = NULL;
|
|
}
|
|
|
|
/*
|
|
* List of 3590 magnetic tape commands.
|
|
*/
|
|
static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = {
|
|
[MTRESET] = tape_std_mtreset,
|
|
[MTFSF] = tape_std_mtfsf,
|
|
[MTBSF] = tape_std_mtbsf,
|
|
[MTFSR] = tape_std_mtfsr,
|
|
[MTBSR] = tape_std_mtbsr,
|
|
[MTWEOF] = tape_std_mtweof,
|
|
[MTREW] = tape_std_mtrew,
|
|
[MTOFFL] = tape_std_mtoffl,
|
|
[MTNOP] = tape_std_mtnop,
|
|
[MTRETEN] = tape_std_mtreten,
|
|
[MTBSFM] = tape_std_mtbsfm,
|
|
[MTFSFM] = tape_std_mtfsfm,
|
|
[MTEOM] = tape_std_mteom,
|
|
[MTERASE] = tape_std_mterase,
|
|
[MTRAS1] = NULL,
|
|
[MTRAS2] = NULL,
|
|
[MTRAS3] = NULL,
|
|
[MTSETBLK] = tape_std_mtsetblk,
|
|
[MTSETDENSITY] = NULL,
|
|
[MTSEEK] = tape_3590_mtseek,
|
|
[MTTELL] = tape_3590_mttell,
|
|
[MTSETDRVBUFFER] = NULL,
|
|
[MTFSS] = NULL,
|
|
[MTBSS] = NULL,
|
|
[MTWSM] = NULL,
|
|
[MTLOCK] = NULL,
|
|
[MTUNLOCK] = NULL,
|
|
[MTLOAD] = tape_std_mtload,
|
|
[MTUNLOAD] = tape_std_mtunload,
|
|
[MTCOMPRESSION] = tape_std_mtcompression,
|
|
[MTSETPART] = NULL,
|
|
[MTMKPART] = NULL
|
|
};
|
|
|
|
/*
|
|
* Tape discipline structure for 3590.
|
|
*/
|
|
static struct tape_discipline tape_discipline_3590 = {
|
|
.owner = THIS_MODULE,
|
|
.setup_device = tape_3590_setup_device,
|
|
.cleanup_device = tape_3590_cleanup_device,
|
|
.process_eov = tape_std_process_eov,
|
|
.irq = tape_3590_irq,
|
|
.read_block = tape_std_read_block,
|
|
.write_block = tape_std_write_block,
|
|
.ioctl_fn = tape_3590_ioctl,
|
|
.mtop_array = tape_3590_mtop
|
|
};
|
|
|
|
static struct ccw_device_id tape_3590_ids[] = {
|
|
{CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},
|
|
{CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},
|
|
{ /* end of list */ }
|
|
};
|
|
|
|
static int
|
|
tape_3590_online(struct ccw_device *cdev)
|
|
{
|
|
return tape_generic_online(dev_get_drvdata(&cdev->dev),
|
|
&tape_discipline_3590);
|
|
}
|
|
|
|
static struct ccw_driver tape_3590_driver = {
|
|
.driver = {
|
|
.name = "tape_3590",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.ids = tape_3590_ids,
|
|
.probe = tape_generic_probe,
|
|
.remove = tape_generic_remove,
|
|
.set_offline = tape_generic_offline,
|
|
.set_online = tape_3590_online,
|
|
.freeze = tape_generic_pm_suspend,
|
|
.int_class = IRQIO_TAP,
|
|
};
|
|
|
|
/*
|
|
* Setup discipline structure.
|
|
*/
|
|
static int
|
|
tape_3590_init(void)
|
|
{
|
|
int rc;
|
|
|
|
TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));
|
|
debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
|
|
#ifdef DBF_LIKE_HELL
|
|
debug_set_level(TAPE_DBF_AREA, 6);
|
|
#endif
|
|
|
|
DBF_EVENT(3, "3590 init\n");
|
|
|
|
tape_3590_wq = alloc_workqueue("tape_3590", 0, 0);
|
|
if (!tape_3590_wq)
|
|
return -ENOMEM;
|
|
|
|
/* Register driver for 3590 tapes. */
|
|
rc = ccw_driver_register(&tape_3590_driver);
|
|
if (rc) {
|
|
destroy_workqueue(tape_3590_wq);
|
|
DBF_EVENT(3, "3590 init failed\n");
|
|
} else
|
|
DBF_EVENT(3, "3590 registered\n");
|
|
return rc;
|
|
}
|
|
|
|
static void
|
|
tape_3590_exit(void)
|
|
{
|
|
ccw_driver_unregister(&tape_3590_driver);
|
|
destroy_workqueue(tape_3590_wq);
|
|
debug_unregister(TAPE_DBF_AREA);
|
|
}
|
|
|
|
MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
|
|
MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
|
|
MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(tape_3590_init);
|
|
module_exit(tape_3590_exit);
|