+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * tape device discipline for 3590 tapes.
- *
- * Copyright IBM Corp. 2001, 2009
- * Author(s): Stefan Bader <shbader@de.ibm.com>
- * Michael Holzheu <holzheu@de.ibm.com>
- * Martin Schwidefsky <schwidefsky@de.ibm.com>
- */
-
-#define pr_fmt(fmt) "tape_3590: " fmt
-
-#include <linux/export.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/bio.h>
-#include <asm/ebcdic.h>
-
-#define TAPE_DBF_AREA tape_3590_dbf
-#define BUFSIZE 512 /* size of buffers for dynamic generated messages */
-
-#include "tape.h"
-#include "tape_std.h"
-#include "tape_3590.h"
-
-static struct workqueue_struct *tape_3590_wq;
-
-/*
- * Pointer to debug area.
- */
-debug_info_t *TAPE_DBF_AREA = NULL;
-EXPORT_SYMBOL(TAPE_DBF_AREA);
-
-/*******************************************************************
- * Error Recovery functions:
- * - Read Opposite: implemented
- * - Read Device (buffered) log: BRA
- * - Read Library log: BRA
- * - Swap Devices: BRA
- * - Long Busy: implemented
- * - Special Intercept: BRA
- * - Read Alternate: implemented
- *******************************************************************/
-
-static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = {
- [0x00] = "",
- [0x10] = "Lost Sense",
- [0x11] = "Assigned Elsewhere",
- [0x12] = "Allegiance Reset",
- [0x13] = "Shared Access Violation",
- [0x20] = "Command Reject",
- [0x21] = "Configuration Error",
- [0x22] = "Protection Exception",
- [0x23] = "Write Protect",
- [0x24] = "Write Length",
- [0x25] = "Read-Only Format",
- [0x31] = "Beginning of Partition",
- [0x33] = "End of Partition",
- [0x34] = "End of Data",
- [0x35] = "Block not found",
- [0x40] = "Device Intervention",
- [0x41] = "Loader Intervention",
- [0x42] = "Library Intervention",
- [0x50] = "Write Error",
- [0x51] = "Erase Error",
- [0x52] = "Formatting Error",
- [0x53] = "Read Error",
- [0x54] = "Unsupported Format",
- [0x55] = "No Formatting",
- [0x56] = "Positioning lost",
- [0x57] = "Read Length",
- [0x60] = "Unsupported Medium",
- [0x61] = "Medium Length Error",
- [0x62] = "Medium removed",
- [0x64] = "Load Check",
- [0x65] = "Unload Check",
- [0x70] = "Equipment Check",
- [0x71] = "Bus out Check",
- [0x72] = "Protocol Error",
- [0x73] = "Interface Error",
- [0x74] = "Overrun",
- [0x75] = "Halt Signal",
- [0x90] = "Device fenced",
- [0x91] = "Device Path fenced",
- [0xa0] = "Volume misplaced",
- [0xa1] = "Volume inaccessible",
- [0xa2] = "Volume in input",
- [0xa3] = "Volume ejected",
- [0xa4] = "All categories reserved",
- [0xa5] = "Duplicate Volume",
- [0xa6] = "Library Manager Offline",
- [0xa7] = "Library Output Station full",
- [0xa8] = "Vision System non-operational",
- [0xa9] = "Library Manager Equipment Check",
- [0xaa] = "Library Equipment Check",
- [0xab] = "All Library Cells full",
- [0xac] = "No Cleaner Volumes in Library",
- [0xad] = "I/O Station door open",
- [0xae] = "Subsystem environmental alert",
-};
-
-static int crypt_supported(struct tape_device *device)
-{
- return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device));
-}
-
-static int crypt_enabled(struct tape_device *device)
-{
- return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device));
-}
-
-static void ext_to_int_kekl(struct tape390_kekl *in,
- struct tape3592_kekl *out)
-{
- int len;
-
- memset(out, 0, sizeof(*out));
- if (in->type == TAPE390_KEKL_TYPE_HASH)
- out->flags |= 0x40;
- if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH)
- out->flags |= 0x80;
- len = min(sizeof(out->label), strlen(in->label));
- memcpy(out->label, in->label, len);
- memset(out->label + len, ' ', sizeof(out->label) - len);
- ASCEBC(out->label, sizeof(out->label));
-}
-
-static void int_to_ext_kekl(struct tape3592_kekl *in,
- struct tape390_kekl *out)
-{
- memset(out, 0, sizeof(*out));
- if(in->flags & 0x40)
- out->type = TAPE390_KEKL_TYPE_HASH;
- else
- out->type = TAPE390_KEKL_TYPE_LABEL;
- if(in->flags & 0x80)
- out->type_on_tape = TAPE390_KEKL_TYPE_HASH;
- else
- out->type_on_tape = TAPE390_KEKL_TYPE_LABEL;
- memcpy(out->label, in->label, sizeof(in->label));
- EBCASC(out->label, sizeof(in->label));
- strim(out->label);
-}
-
-static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in,
- struct tape390_kekl_pair *out)
-{
- if (in->count == 0) {
- out->kekl[0].type = TAPE390_KEKL_TYPE_NONE;
- out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE;
- out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;
- out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;
- } else if (in->count == 1) {
- int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
- out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;
- out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;
- } else if (in->count == 2) {
- int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
- int_to_ext_kekl(&in->kekl[1], &out->kekl[1]);
- } else {
- printk("Invalid KEKL number: %d\n", in->count);
- BUG();
- }
-}
-
-static int check_ext_kekl(struct tape390_kekl *kekl)
-{
- if (kekl->type == TAPE390_KEKL_TYPE_NONE)
- goto invalid;
- if (kekl->type > TAPE390_KEKL_TYPE_HASH)
- goto invalid;
- if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE)
- goto invalid;
- if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH)
- goto invalid;
- if ((kekl->type == TAPE390_KEKL_TYPE_HASH) &&
- (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL))
- goto invalid;
-
- return 0;
-invalid:
- return -EINVAL;
-}
-
-static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls)
-{
- if (check_ext_kekl(&kekls->kekl[0]))
- goto invalid;
- if (check_ext_kekl(&kekls->kekl[1]))
- goto invalid;
-
- return 0;
-invalid:
- return -EINVAL;
-}
-
-/*
- * Query KEKLs
- */
-static int tape_3592_kekl_query(struct tape_device *device,
- struct tape390_kekl_pair *ext_kekls)
-{
- struct tape_request *request;
- struct tape3592_kekl_query_order *order;
- struct tape3592_kekl_query_data *int_kekls;
- int rc;
-
- DBF_EVENT(6, "tape3592_kekl_query\n");
- int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA);
- if (!int_kekls)
- return -ENOMEM;
- request = tape_alloc_request(2, sizeof(*order));
- if (IS_ERR(request)) {
- rc = PTR_ERR(request);
- goto fail_malloc;
- }
- order = request->cpdata;
- memset(order,0,sizeof(*order));
- order->code = 0xe2;
- order->max_count = 2;
- request->op = TO_KEKL_QUERY;
- tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
- tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls),
- int_kekls);
- rc = tape_do_io(device, request);
- if (rc)
- goto fail_request;
- int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls);
-
- rc = 0;
-fail_request:
- tape_free_request(request);
-fail_malloc:
- kfree(int_kekls);
- return rc;
-}
-
-/*
- * IOCTL: Query KEKLs
- */
-static int tape_3592_ioctl_kekl_query(struct tape_device *device,
- unsigned long arg)
-{
- int rc;
- struct tape390_kekl_pair *ext_kekls;
-
- DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n");
- if (!crypt_supported(device))
- return -ENOSYS;
- if (!crypt_enabled(device))
- return -EUNATCH;
- ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL);
- if (!ext_kekls)
- return -ENOMEM;
- rc = tape_3592_kekl_query(device, ext_kekls);
- if (rc != 0)
- goto fail;
- if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) {
- rc = -EFAULT;
- goto fail;
- }
- rc = 0;
-fail:
- kfree(ext_kekls);
- return rc;
-}
-
-static int tape_3590_mttell(struct tape_device *device, int mt_count);
-
-/*
- * Set KEKLs
- */
-static int tape_3592_kekl_set(struct tape_device *device,
- struct tape390_kekl_pair *ext_kekls)
-{
- struct tape_request *request;
- struct tape3592_kekl_set_order *order;
-
- DBF_EVENT(6, "tape3592_kekl_set\n");
- if (check_ext_kekl_pair(ext_kekls)) {
- DBF_EVENT(6, "invalid kekls\n");
- return -EINVAL;
- }
- if (tape_3590_mttell(device, 0) != 0)
- return -EBADSLT;
- request = tape_alloc_request(1, sizeof(*order));
- if (IS_ERR(request))
- return PTR_ERR(request);
- order = request->cpdata;
- memset(order, 0, sizeof(*order));
- order->code = 0xe3;
- order->kekls.count = 2;
- ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]);
- ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]);
- request->op = TO_KEKL_SET;
- tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
-
- return tape_do_io_free(device, request);
-}
-
-/*
- * IOCTL: Set KEKLs
- */
-static int tape_3592_ioctl_kekl_set(struct tape_device *device,
- unsigned long arg)
-{
- int rc;
- struct tape390_kekl_pair *ext_kekls;
-
- DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n");
- if (!crypt_supported(device))
- return -ENOSYS;
- if (!crypt_enabled(device))
- return -EUNATCH;
- ext_kekls = memdup_user((char __user *)arg, sizeof(*ext_kekls));
- if (IS_ERR(ext_kekls))
- return PTR_ERR(ext_kekls);
- rc = tape_3592_kekl_set(device, ext_kekls);
- kfree(ext_kekls);
- return rc;
-}
-
-/*
- * Enable encryption
- */
-static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device)
-{
- struct tape_request *request;
- char *data;
-
- DBF_EVENT(6, "tape_3592_enable_crypt\n");
- if (!crypt_supported(device))
- return ERR_PTR(-ENOSYS);
- request = tape_alloc_request(2, 72);
- if (IS_ERR(request))
- return request;
- data = request->cpdata;
- memset(data,0,72);
-
- data[0] = 0x05;
- data[36 + 0] = 0x03;
- data[36 + 1] = 0x03;
- data[36 + 4] = 0x40;
- data[36 + 6] = 0x01;
- data[36 + 14] = 0x2f;
- data[36 + 18] = 0xc3;
- data[36 + 35] = 0x72;
- request->op = TO_CRYPT_ON;
- tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
- tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
- return request;
-}
-
-static int tape_3592_enable_crypt(struct tape_device *device)
-{
- struct tape_request *request;
-
- request = __tape_3592_enable_crypt(device);
- if (IS_ERR(request))
- return PTR_ERR(request);
- return tape_do_io_free(device, request);
-}
-
-static void tape_3592_enable_crypt_async(struct tape_device *device)
-{
- struct tape_request *request;
-
- request = __tape_3592_enable_crypt(device);
- if (!IS_ERR(request))
- tape_do_io_async_free(device, request);
-}
-
-/*
- * Disable encryption
- */
-static struct tape_request *__tape_3592_disable_crypt(struct tape_device *device)
-{
- struct tape_request *request;
- char *data;
-
- DBF_EVENT(6, "tape_3592_disable_crypt\n");
- if (!crypt_supported(device))
- return ERR_PTR(-ENOSYS);
- request = tape_alloc_request(2, 72);
- if (IS_ERR(request))
- return request;
- data = request->cpdata;
- memset(data,0,72);
-
- data[0] = 0x05;
- data[36 + 0] = 0x03;
- data[36 + 1] = 0x03;
- data[36 + 35] = 0x32;
-
- request->op = TO_CRYPT_OFF;
- tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
- tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
-
- return request;
-}
-
-static int tape_3592_disable_crypt(struct tape_device *device)
-{
- struct tape_request *request;
-
- request = __tape_3592_disable_crypt(device);
- if (IS_ERR(request))
- return PTR_ERR(request);
- return tape_do_io_free(device, request);
-}
-
-static void tape_3592_disable_crypt_async(struct tape_device *device)
-{
- struct tape_request *request;
-
- request = __tape_3592_disable_crypt(device);
- if (!IS_ERR(request))
- tape_do_io_async_free(device, request);
-}
-
-/*
- * IOCTL: Set encryption status
- */
-static int tape_3592_ioctl_crypt_set(struct tape_device *device,
- unsigned long arg)
-{
- struct tape390_crypt_info info;
-
- DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n");
- if (!crypt_supported(device))
- return -ENOSYS;
- 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 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_succeeded(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_succeeded(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);
-}
-
-/*
- * 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 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);
- }
- 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,
- .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", WQ_PERCPU, 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);
projects / thirdparty / kernel / linux.git / commitdiff
