Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Borislav Petkov | 5ce78af | 2008-02-02 19:56:48 +0100 | [diff] [blame] | 2 | * IDE ATAPI streaming tape driver. |
| 3 | * |
Bartlomiej Zolnierkiewicz | 59bca8c | 2008-02-01 23:09:33 +0100 | [diff] [blame] | 4 | * Copyright (C) 1995-1999 Gadi Oxman <gadio@netvision.net.il> |
| 5 | * Copyright (C) 2003-2005 Bartlomiej Zolnierkiewicz |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * This driver was constructed as a student project in the software laboratory |
| 8 | * of the faculty of electrical engineering in the Technion - Israel's |
| 9 | * Institute Of Technology, with the guide of Avner Lottem and Dr. Ilana David. |
| 10 | * |
| 11 | * It is hereby placed under the terms of the GNU general public license. |
| 12 | * (See linux/COPYING). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Borislav Petkov | 5ce78af | 2008-02-02 19:56:48 +0100 | [diff] [blame] | 14 | * For a historical changelog see |
| 15 | * Documentation/ide/ChangeLog.ide-tape.1995-2002 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | */ |
| 17 | |
Bartlomiej Zolnierkiewicz | 51509ee | 2008-10-10 22:39:34 +0200 | [diff] [blame] | 18 | #define DRV_NAME "ide-tape" |
| 19 | |
Borislav Petkov | dfe7993 | 2008-02-06 02:57:55 +0100 | [diff] [blame] | 20 | #define IDETAPE_VERSION "1.20" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/module.h> |
| 23 | #include <linux/types.h> |
| 24 | #include <linux/string.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/timer.h> |
| 28 | #include <linux/mm.h> |
| 29 | #include <linux/interrupt.h> |
Marcelo Feitoza Parisi | 9bae1ff | 2006-03-28 01:56:46 -0800 | [diff] [blame] | 30 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/major.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/errno.h> |
| 33 | #include <linux/genhd.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/pci.h> |
| 36 | #include <linux/ide.h> |
| 37 | #include <linux/smp_lock.h> |
| 38 | #include <linux/completion.h> |
| 39 | #include <linux/bitops.h> |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 40 | #include <linux/mutex.h> |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 41 | #include <scsi/scsi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | #include <asm/byteorder.h> |
Borislav Petkov | c837cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 44 | #include <linux/irq.h> |
| 45 | #include <linux/uaccess.h> |
| 46 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/mtio.h> |
| 49 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 50 | enum { |
| 51 | /* output errors only */ |
| 52 | DBG_ERR = (1 << 0), |
| 53 | /* output all sense key/asc */ |
| 54 | DBG_SENSE = (1 << 1), |
| 55 | /* info regarding all chrdev-related procedures */ |
| 56 | DBG_CHRDEV = (1 << 2), |
| 57 | /* all remaining procedures */ |
| 58 | DBG_PROCS = (1 << 3), |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 59 | }; |
| 60 | |
| 61 | /* define to see debug info */ |
| 62 | #define IDETAPE_DEBUG_LOG 0 |
| 63 | |
| 64 | #if IDETAPE_DEBUG_LOG |
| 65 | #define debug_log(lvl, fmt, args...) \ |
| 66 | { \ |
| 67 | if (tape->debug_mask & lvl) \ |
| 68 | printk(KERN_INFO "ide-tape: " fmt, ## args); \ |
| 69 | } |
| 70 | #else |
| 71 | #define debug_log(lvl, fmt, args...) do {} while (0) |
| 72 | #endif |
| 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | /**************************** Tunable parameters *****************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 76 | * After each failed packet command we issue a request sense command and retry |
| 77 | * the packet command IDETAPE_MAX_PC_RETRIES times. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 79 | * Setting IDETAPE_MAX_PC_RETRIES to 0 will disable retries. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | */ |
| 81 | #define IDETAPE_MAX_PC_RETRIES 3 |
| 82 | |
| 83 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 84 | * The following parameter is used to select the point in the internal tape fifo |
| 85 | * in which we will start to refill the buffer. Decreasing the following |
| 86 | * parameter will improve the system's latency and interactive response, while |
| 87 | * using a high value might improve system throughput. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | */ |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 89 | #define IDETAPE_FIFO_THRESHOLD 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 92 | * DSC polling parameters. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 94 | * Polling for DSC (a single bit in the status register) is a very important |
| 95 | * function in ide-tape. There are two cases in which we poll for DSC: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 97 | * 1. Before a read/write packet command, to ensure that we can transfer data |
| 98 | * from/to the tape's data buffers, without causing an actual media access. |
| 99 | * In case the tape is not ready yet, we take out our request from the device |
| 100 | * request queue, so that ide.c could service requests from the other device |
| 101 | * on the same interface in the meantime. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 103 | * 2. After the successful initialization of a "media access packet command", |
| 104 | * which is a command that can take a long time to complete (the interval can |
| 105 | * range from several seconds to even an hour). Again, we postpone our request |
| 106 | * in the middle to free the bus for the other device. The polling frequency |
| 107 | * here should be lower than the read/write frequency since those media access |
| 108 | * commands are slow. We start from a "fast" frequency - IDETAPE_DSC_MA_FAST |
| 109 | * (1 second), and if we don't receive DSC after IDETAPE_DSC_MA_THRESHOLD |
| 110 | * (5 min), we switch it to a lower frequency - IDETAPE_DSC_MA_SLOW (1 min). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 112 | * We also set a timeout for the timer, in case something goes wrong. The |
| 113 | * timeout should be longer then the maximum execution time of a tape operation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | */ |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 115 | |
| 116 | /* DSC timings. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | #define IDETAPE_DSC_RW_MIN 5*HZ/100 /* 50 msec */ |
| 118 | #define IDETAPE_DSC_RW_MAX 40*HZ/100 /* 400 msec */ |
| 119 | #define IDETAPE_DSC_RW_TIMEOUT 2*60*HZ /* 2 minutes */ |
| 120 | #define IDETAPE_DSC_MA_FAST 2*HZ /* 2 seconds */ |
| 121 | #define IDETAPE_DSC_MA_THRESHOLD 5*60*HZ /* 5 minutes */ |
| 122 | #define IDETAPE_DSC_MA_SLOW 30*HZ /* 30 seconds */ |
| 123 | #define IDETAPE_DSC_MA_TIMEOUT 2*60*60*HZ /* 2 hours */ |
| 124 | |
| 125 | /*************************** End of tunable parameters ***********************/ |
| 126 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 127 | /* tape directions */ |
| 128 | enum { |
| 129 | IDETAPE_DIR_NONE = (1 << 0), |
| 130 | IDETAPE_DIR_READ = (1 << 1), |
| 131 | IDETAPE_DIR_WRITE = (1 << 2), |
| 132 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
| 134 | struct idetape_bh { |
Stephen Rothwell | ab05796 | 2007-08-01 23:46:44 +0200 | [diff] [blame] | 135 | u32 b_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | atomic_t b_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | char *b_data; |
| 138 | }; |
| 139 | |
Borislav Petkov | 03056b9 | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 140 | /* Tape door status */ |
| 141 | #define DOOR_UNLOCKED 0 |
| 142 | #define DOOR_LOCKED 1 |
| 143 | #define DOOR_EXPLICITLY_LOCKED 2 |
| 144 | |
| 145 | /* Some defines for the SPACE command */ |
| 146 | #define IDETAPE_SPACE_OVER_FILEMARK 1 |
| 147 | #define IDETAPE_SPACE_TO_EOD 3 |
| 148 | |
| 149 | /* Some defines for the LOAD UNLOAD command */ |
| 150 | #define IDETAPE_LU_LOAD_MASK 1 |
| 151 | #define IDETAPE_LU_RETENSION_MASK 2 |
| 152 | #define IDETAPE_LU_EOT_MASK 4 |
| 153 | |
Borislav Petkov | 03056b9 | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 154 | /* Structures related to the SELECT SENSE / MODE SENSE packet commands. */ |
| 155 | #define IDETAPE_BLOCK_DESCRIPTOR 0 |
| 156 | #define IDETAPE_CAPABILITIES_PAGE 0x2a |
| 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 159 | * Most of our global data which we need to save even as we leave the driver due |
| 160 | * to an interrupt or a timer event is stored in the struct defined below. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | */ |
| 162 | typedef struct ide_tape_obj { |
Bartlomiej Zolnierkiewicz | 7f3c868 | 2009-01-06 17:20:53 +0100 | [diff] [blame] | 163 | ide_drive_t *drive; |
| 164 | struct ide_driver *driver; |
| 165 | struct gendisk *disk; |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 166 | struct device dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
Bartlomiej Zolnierkiewicz | 2e8a6f8 | 2008-10-10 22:39:36 +0200 | [diff] [blame] | 168 | /* used by REQ_IDETAPE_{READ,WRITE} requests */ |
| 169 | struct ide_atapi_pc queued_pc; |
Bartlomiej Zolnierkiewicz | 394a4c2 | 2008-10-10 22:39:35 +0200 | [diff] [blame] | 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 172 | * DSC polling variables. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 174 | * While polling for DSC we use postponed_rq to postpone the current |
| 175 | * request so that ide.c will be able to service pending requests on the |
| 176 | * other device. Note that at most we will have only one DSC (usually |
Borislav Petkov | 5bd50dc | 2008-04-27 15:38:28 +0200 | [diff] [blame] | 177 | * data transfer) request in the device request queue. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | */ |
| 179 | struct request *postponed_rq; |
| 180 | /* The time in which we started polling for DSC */ |
| 181 | unsigned long dsc_polling_start; |
| 182 | /* Timer used to poll for dsc */ |
| 183 | struct timer_list dsc_timer; |
| 184 | /* Read/Write dsc polling frequency */ |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 185 | unsigned long best_dsc_rw_freq; |
| 186 | unsigned long dsc_poll_freq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | unsigned long dsc_timeout; |
| 188 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 189 | /* Read position information */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | u8 partition; |
| 191 | /* Current block */ |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 192 | unsigned int first_frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 194 | /* Last error information */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | u8 sense_key, asc, ascq; |
| 196 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 197 | /* Character device operation */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | unsigned int minor; |
| 199 | /* device name */ |
| 200 | char name[4]; |
| 201 | /* Current character device data transfer direction */ |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 202 | u8 chrdev_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 204 | /* tape block size, usually 512 or 1024 bytes */ |
| 205 | unsigned short blk_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | int user_bs_factor; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | /* Copy of the tape's Capabilities and Mechanical Page */ |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 209 | u8 caps[20]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 212 | * Active data transfer request parameters. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 214 | * At most, there is only one ide-tape originated data transfer request |
| 215 | * in the device request queue. This allows ide.c to easily service |
| 216 | * requests from the other device when we postpone our active request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | */ |
Borislav Petkov | 83042b2 | 2008-04-27 15:38:27 +0200 | [diff] [blame] | 218 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 219 | /* Data buffer size chosen based on the tape's recommendation */ |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 220 | int buffer_size; |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 221 | /* merge buffer */ |
| 222 | struct idetape_bh *merge_bh; |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 223 | /* size of the merge buffer */ |
| 224 | int merge_bh_size; |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 225 | /* pointer to current buffer head within the merge buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | struct idetape_bh *bh; |
| 227 | char *b_data; |
| 228 | int b_count; |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 229 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 230 | /* Measures average tape speed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | unsigned long avg_time; |
| 232 | int avg_size; |
| 233 | int avg_speed; |
| 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | /* the door is currently locked */ |
| 236 | int door_locked; |
| 237 | /* the tape hardware is write protected */ |
| 238 | char drv_write_prot; |
| 239 | /* the tape is write protected (hardware or opened as read-only) */ |
| 240 | char write_prot; |
| 241 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 242 | u32 debug_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } idetape_tape_t; |
| 244 | |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 245 | static DEFINE_MUTEX(idetape_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
Will Dyson | d5dee80 | 2005-09-16 02:55:07 -0700 | [diff] [blame] | 247 | static struct class *idetape_sysfs_class; |
| 248 | |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 249 | static void ide_tape_release(struct device *); |
Bartlomiej Zolnierkiewicz | 08da591 | 2008-07-24 22:53:15 +0200 | [diff] [blame] | 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | static struct ide_tape_obj *ide_tape_get(struct gendisk *disk) |
| 252 | { |
| 253 | struct ide_tape_obj *tape = NULL; |
| 254 | |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 255 | mutex_lock(&idetape_ref_mutex); |
Borislav Petkov | 5aeddf9 | 2008-10-13 21:39:34 +0200 | [diff] [blame] | 256 | tape = ide_drv_g(disk, ide_tape_obj); |
Bartlomiej Zolnierkiewicz | 08da591 | 2008-07-24 22:53:15 +0200 | [diff] [blame] | 257 | if (tape) { |
Bartlomiej Zolnierkiewicz | d3e33ff | 2008-08-05 18:16:59 +0200 | [diff] [blame] | 258 | if (ide_device_get(tape->drive)) |
Bartlomiej Zolnierkiewicz | 08da591 | 2008-07-24 22:53:15 +0200 | [diff] [blame] | 259 | tape = NULL; |
Bartlomiej Zolnierkiewicz | d3e33ff | 2008-08-05 18:16:59 +0200 | [diff] [blame] | 260 | else |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 261 | get_device(&tape->dev); |
Bartlomiej Zolnierkiewicz | 08da591 | 2008-07-24 22:53:15 +0200 | [diff] [blame] | 262 | } |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 263 | mutex_unlock(&idetape_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | return tape; |
| 265 | } |
| 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | static void ide_tape_put(struct ide_tape_obj *tape) |
| 268 | { |
Bartlomiej Zolnierkiewicz | d3e33ff | 2008-08-05 18:16:59 +0200 | [diff] [blame] | 269 | ide_drive_t *drive = tape->drive; |
| 270 | |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 271 | mutex_lock(&idetape_ref_mutex); |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 272 | put_device(&tape->dev); |
Bartlomiej Zolnierkiewicz | d3e33ff | 2008-08-05 18:16:59 +0200 | [diff] [blame] | 273 | ide_device_put(drive); |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 274 | mutex_unlock(&idetape_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 278 | * The variables below are used for the character device interface. Additional |
| 279 | * state variables are defined in our ide_drive_t structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 281 | static struct ide_tape_obj *idetape_devs[MAX_HWIFS * MAX_DRIVES]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | static struct ide_tape_obj *ide_tape_chrdev_get(unsigned int i) |
| 284 | { |
| 285 | struct ide_tape_obj *tape = NULL; |
| 286 | |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 287 | mutex_lock(&idetape_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | tape = idetape_devs[i]; |
| 289 | if (tape) |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 290 | get_device(&tape->dev); |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 291 | mutex_unlock(&idetape_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | return tape; |
| 293 | } |
| 294 | |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 295 | static int idetape_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 296 | unsigned int bcount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | { |
| 298 | struct idetape_bh *bh = pc->bh; |
| 299 | int count; |
| 300 | |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 301 | if (bcount && bh) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 302 | count = min( |
| 303 | (unsigned int)(bh->b_size - atomic_read(&bh->b_count)), |
| 304 | bcount); |
Bartlomiej Zolnierkiewicz | 374e042 | 2008-07-23 19:55:56 +0200 | [diff] [blame] | 305 | drive->hwif->tp_ops->input_data(drive, NULL, bh->b_data + |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 306 | atomic_read(&bh->b_count), count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | bcount -= count; |
| 308 | atomic_add(count, &bh->b_count); |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 309 | if (atomic_read(&bh->b_count) == bh->b_size) |
| 310 | pc->bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 312 | |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 313 | return bcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | } |
| 315 | |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 316 | static int idetape_output_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 317 | unsigned int bcount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | { |
| 319 | struct idetape_bh *bh = pc->bh; |
| 320 | int count; |
| 321 | |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 322 | if (bcount && bh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | count = min((unsigned int)pc->b_count, (unsigned int)bcount); |
Bartlomiej Zolnierkiewicz | 374e042 | 2008-07-23 19:55:56 +0200 | [diff] [blame] | 324 | drive->hwif->tp_ops->output_data(drive, NULL, pc->b_data, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | bcount -= count; |
| 326 | pc->b_data += count; |
| 327 | pc->b_count -= count; |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 328 | if (!pc->b_count) |
| 329 | pc->bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 331 | |
| 332 | return bcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 335 | static void idetape_update_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | { |
| 337 | struct idetape_bh *bh = pc->bh; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 338 | unsigned int bcount = pc->xferred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 340 | if (pc->flags & PC_FLAG_WRITING) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | return; |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 342 | if (bcount) { |
| 343 | if (bh == NULL || bcount > bh->b_size) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 344 | printk(KERN_ERR "ide-tape: bh == NULL in %s\n", |
| 345 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | return; |
| 347 | } |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 348 | atomic_set(&bh->b_count, bcount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | if (atomic_read(&bh->b_count) == bh->b_size) |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 350 | pc->bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | /* |
Borislav Petkov | 1b5db43 | 2008-02-02 19:56:48 +0100 | [diff] [blame] | 355 | * called on each failed packet command retry to analyze the request sense. We |
| 356 | * currently do not utilize this information. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | */ |
Borislav Petkov | 1b5db43 | 2008-02-02 19:56:48 +0100 | [diff] [blame] | 358 | static void idetape_analyze_error(ide_drive_t *drive, u8 *sense) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | { |
| 360 | idetape_tape_t *tape = drive->driver_data; |
Bartlomiej Zolnierkiewicz | 5e2040fd | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 361 | struct ide_atapi_pc *pc = drive->failed_pc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Borislav Petkov | 1b5db43 | 2008-02-02 19:56:48 +0100 | [diff] [blame] | 363 | tape->sense_key = sense[2] & 0xF; |
| 364 | tape->asc = sense[12]; |
| 365 | tape->ascq = sense[13]; |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 366 | |
| 367 | debug_log(DBG_ERR, "pc = %x, sense key = %x, asc = %x, ascq = %x\n", |
| 368 | pc->c[0], tape->sense_key, tape->asc, tape->ascq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 370 | /* Correct pc->xferred by asking the tape. */ |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 371 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 372 | pc->xferred = pc->req_xfer - |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 373 | tape->blk_size * |
Harvey Harrison | 5d0cc8a | 2008-07-15 21:21:41 +0200 | [diff] [blame] | 374 | get_unaligned_be32(&sense[3]); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 375 | idetape_update_buffers(drive, pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | /* |
| 379 | * If error was the result of a zero-length read or write command, |
| 380 | * with sense key=5, asc=0x22, ascq=0, let it slide. Some drives |
| 381 | * (i.e. Seagate STT3401A Travan) don't support 0-length read/writes. |
| 382 | */ |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 383 | if ((pc->c[0] == READ_6 || pc->c[0] == WRITE_6) |
Borislav Petkov | 1b5db43 | 2008-02-02 19:56:48 +0100 | [diff] [blame] | 384 | /* length == 0 */ |
| 385 | && pc->c[4] == 0 && pc->c[3] == 0 && pc->c[2] == 0) { |
| 386 | if (tape->sense_key == 5) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | /* don't report an error, everything's ok */ |
| 388 | pc->error = 0; |
| 389 | /* don't retry read/write */ |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 390 | pc->flags |= PC_FLAG_ABORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | } |
| 392 | } |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 393 | if (pc->c[0] == READ_6 && (sense[2] & 0x80)) { |
Bartlomiej Zolnierkiewicz | c152cc1 | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 394 | pc->error = IDE_DRV_ERROR_FILEMARK; |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 395 | pc->flags |= PC_FLAG_ABORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | } |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 397 | if (pc->c[0] == WRITE_6) { |
Borislav Petkov | 1b5db43 | 2008-02-02 19:56:48 +0100 | [diff] [blame] | 398 | if ((sense[2] & 0x40) || (tape->sense_key == 0xd |
| 399 | && tape->asc == 0x0 && tape->ascq == 0x2)) { |
Bartlomiej Zolnierkiewicz | c152cc1 | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 400 | pc->error = IDE_DRV_ERROR_EOD; |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 401 | pc->flags |= PC_FLAG_ABORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | } |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 404 | if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) { |
Borislav Petkov | 1b5db43 | 2008-02-02 19:56:48 +0100 | [diff] [blame] | 405 | if (tape->sense_key == 8) { |
Bartlomiej Zolnierkiewicz | c152cc1 | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 406 | pc->error = IDE_DRV_ERROR_EOD; |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 407 | pc->flags |= PC_FLAG_ABORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 409 | if (!(pc->flags & PC_FLAG_ABORT) && |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 410 | pc->xferred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | pc->retries = IDETAPE_MAX_PC_RETRIES + 1; |
| 412 | } |
| 413 | } |
| 414 | |
Borislav Petkov | d01dbc3 | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 415 | /* Free data buffers completely. */ |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 416 | static void ide_tape_kfree_buffer(idetape_tape_t *tape) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | { |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 418 | struct idetape_bh *bh = tape->merge_bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 420 | kfree(bh->b_data); |
| 421 | kfree(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | |
Bartlomiej Zolnierkiewicz | b14c721 | 2008-10-13 21:39:30 +0200 | [diff] [blame] | 424 | static void ide_tape_handle_dsc(ide_drive_t *); |
| 425 | |
Bartlomiej Zolnierkiewicz | 03a2faa | 2009-03-27 12:46:36 +0100 | [diff] [blame] | 426 | static int ide_tape_callback(ide_drive_t *drive, int dsc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
| 428 | idetape_tape_t *tape = drive->driver_data; |
Bartlomiej Zolnierkiewicz | 2b9efba | 2008-10-13 21:39:31 +0200 | [diff] [blame] | 429 | struct ide_atapi_pc *pc = drive->pc; |
Bartlomiej Zolnierkiewicz | 313afea | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 430 | struct request *rq = drive->hwif->rq; |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 431 | int uptodate = pc->error ? 0 : 1; |
Bartlomiej Zolnierkiewicz | 313afea | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 432 | int err = uptodate ? 0 : IDE_DRV_ERROR_GENERAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 434 | debug_log(DBG_PROCS, "Enter %s\n", __func__); |
| 435 | |
Bartlomiej Zolnierkiewicz | b14c721 | 2008-10-13 21:39:30 +0200 | [diff] [blame] | 436 | if (dsc) |
| 437 | ide_tape_handle_dsc(drive); |
| 438 | |
Bartlomiej Zolnierkiewicz | 5e2040fd | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 439 | if (drive->failed_pc == pc) |
| 440 | drive->failed_pc = NULL; |
Bartlomiej Zolnierkiewicz | dd2e9a0 | 2008-07-15 21:22:01 +0200 | [diff] [blame] | 441 | |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 442 | if (pc->c[0] == REQUEST_SENSE) { |
| 443 | if (uptodate) |
| 444 | idetape_analyze_error(drive, pc->buf); |
| 445 | else |
| 446 | printk(KERN_ERR "ide-tape: Error in REQUEST SENSE " |
| 447 | "itself - Aborting request!\n"); |
| 448 | } else if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) { |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 449 | int blocks = pc->xferred / tape->blk_size; |
| 450 | |
| 451 | tape->avg_size += blocks * tape->blk_size; |
| 452 | |
| 453 | if (time_after_eq(jiffies, tape->avg_time + HZ)) { |
| 454 | tape->avg_speed = tape->avg_size * HZ / |
| 455 | (jiffies - tape->avg_time) / 1024; |
| 456 | tape->avg_size = 0; |
| 457 | tape->avg_time = jiffies; |
| 458 | } |
| 459 | |
| 460 | tape->first_frame += blocks; |
| 461 | rq->current_nr_sectors -= blocks; |
| 462 | |
Bartlomiej Zolnierkiewicz | 313afea | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 463 | if (pc->error) { |
| 464 | uptodate = 0; |
| 465 | err = pc->error; |
| 466 | } |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 467 | } else if (pc->c[0] == READ_POSITION && uptodate) { |
Bartlomiej Zolnierkiewicz | 2b9efba | 2008-10-13 21:39:31 +0200 | [diff] [blame] | 468 | u8 *readpos = pc->buf; |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 469 | |
| 470 | debug_log(DBG_SENSE, "BOP - %s\n", |
| 471 | (readpos[0] & 0x80) ? "Yes" : "No"); |
| 472 | debug_log(DBG_SENSE, "EOP - %s\n", |
| 473 | (readpos[0] & 0x40) ? "Yes" : "No"); |
| 474 | |
| 475 | if (readpos[0] & 0x4) { |
| 476 | printk(KERN_INFO "ide-tape: Block location is unknown" |
| 477 | "to the tape\n"); |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 478 | clear_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags); |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 479 | uptodate = 0; |
Bartlomiej Zolnierkiewicz | 313afea | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 480 | err = IDE_DRV_ERROR_GENERAL; |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 481 | } else { |
| 482 | debug_log(DBG_SENSE, "Block Location - %u\n", |
Harvey Harrison | cd740ab | 2008-07-24 22:53:33 +0200 | [diff] [blame] | 483 | be32_to_cpup((__be32 *)&readpos[4])); |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 484 | |
| 485 | tape->partition = readpos[1]; |
Harvey Harrison | cd740ab | 2008-07-24 22:53:33 +0200 | [diff] [blame] | 486 | tape->first_frame = be32_to_cpup((__be32 *)&readpos[4]); |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 487 | set_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags); |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 488 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | } |
Bartlomiej Zolnierkiewicz | 5985e6a | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 490 | |
Bartlomiej Zolnierkiewicz | 313afea | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 491 | rq->errors = err; |
| 492 | |
Bartlomiej Zolnierkiewicz | 03a2faa | 2009-03-27 12:46:36 +0100 | [diff] [blame] | 493 | return uptodate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
| 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 497 | * Postpone the current request so that ide.c will be able to service requests |
Bartlomiej Zolnierkiewicz | b65fac3 | 2009-01-06 17:20:50 +0100 | [diff] [blame] | 498 | * from another device on the same port while we are polling for DSC. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 500 | static void idetape_postpone_request(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | { |
| 502 | idetape_tape_t *tape = drive->driver_data; |
| 503 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 504 | debug_log(DBG_PROCS, "Enter %s\n", __func__); |
| 505 | |
Bartlomiej Zolnierkiewicz | b65fac3 | 2009-01-06 17:20:50 +0100 | [diff] [blame] | 506 | tape->postponed_rq = drive->hwif->rq; |
| 507 | |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 508 | ide_stall_queue(drive, tape->dsc_poll_freq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | } |
| 510 | |
Bartlomiej Zolnierkiewicz | 74e63e74 | 2008-07-15 21:22:01 +0200 | [diff] [blame] | 511 | static void ide_tape_handle_dsc(ide_drive_t *drive) |
| 512 | { |
| 513 | idetape_tape_t *tape = drive->driver_data; |
| 514 | |
| 515 | /* Media access command */ |
| 516 | tape->dsc_polling_start = jiffies; |
| 517 | tape->dsc_poll_freq = IDETAPE_DSC_MA_FAST; |
| 518 | tape->dsc_timeout = jiffies + IDETAPE_DSC_MA_TIMEOUT; |
| 519 | /* Allow ide.c to handle other requests */ |
| 520 | idetape_postpone_request(drive); |
| 521 | } |
| 522 | |
Bartlomiej Zolnierkiewicz | acaa0f5 | 2008-10-10 22:39:36 +0200 | [diff] [blame] | 523 | static int ide_tape_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
Bartlomiej Zolnierkiewicz | 08424ac | 2008-07-15 21:22:01 +0200 | [diff] [blame] | 524 | unsigned int bcount, int write) |
| 525 | { |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 526 | unsigned int bleft; |
Bartlomiej Zolnierkiewicz | acaa0f5 | 2008-10-10 22:39:36 +0200 | [diff] [blame] | 527 | |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 528 | if (write) |
| 529 | bleft = idetape_output_buffers(drive, pc, bcount); |
| 530 | else |
| 531 | bleft = idetape_input_buffers(drive, pc, bcount); |
| 532 | |
| 533 | return bcount - bleft; |
Bartlomiej Zolnierkiewicz | 08424ac | 2008-07-15 21:22:01 +0200 | [diff] [blame] | 534 | } |
Borislav Petkov | a1efc85 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 537 | * Packet Command Interface |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | * |
Bartlomiej Zolnierkiewicz | 2b9efba | 2008-10-13 21:39:31 +0200 | [diff] [blame] | 539 | * The current Packet Command is available in drive->pc, and will not change |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 540 | * until we finish handling it. Each packet command is associated with a |
| 541 | * callback function that will be called when the command is finished. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 543 | * The handling will be done in three stages: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | * |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 545 | * 1. ide_tape_issue_pc will send the packet command to the drive, and will set |
Bartlomiej Zolnierkiewicz | aa5d2de7 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 546 | * the interrupt handler to ide_pc_intr. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | * |
Bartlomiej Zolnierkiewicz | aa5d2de7 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 548 | * 2. On each interrupt, ide_pc_intr will be called. This step will be |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 549 | * repeated until the device signals us that no more interrupts will be issued. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 551 | * 3. ATAPI Tape media access commands have immediate status with a delayed |
| 552 | * process. In case of a successful initiation of a media access packet command, |
| 553 | * the DSC bit will be set when the actual execution of the command is finished. |
| 554 | * Since the tape drive will not issue an interrupt, we have to poll for this |
| 555 | * event. In this case, we define the request as "low priority request" by |
| 556 | * setting rq_status to IDETAPE_RQ_POSTPONED, set a timer to poll for DSC and |
| 557 | * exit the driver. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 559 | * ide.c will then give higher priority to requests which originate from the |
| 560 | * other device, until will change rq_status to RQ_ACTIVE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 562 | * 4. When the packet command is finished, it will be checked for errors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 564 | * 5. In case an error was found, we queue a request sense packet command in |
| 565 | * front of the request queue and retry the operation up to |
| 566 | * IDETAPE_MAX_PC_RETRIES times. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 568 | * 6. In case no error was found, or we decided to give up and not to retry |
| 569 | * again, the callback function will be called and then we will handle the next |
| 570 | * request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 573 | static ide_startstop_t ide_tape_issue_pc(ide_drive_t *drive, |
| 574 | struct ide_cmd *cmd, |
| 575 | struct ide_atapi_pc *pc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | idetape_tape_t *tape = drive->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Bartlomiej Zolnierkiewicz | 5e2040fd | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 579 | if (drive->failed_pc == NULL && pc->c[0] != REQUEST_SENSE) |
| 580 | drive->failed_pc = pc; |
Bartlomiej Zolnierkiewicz | 2b9efba | 2008-10-13 21:39:31 +0200 | [diff] [blame] | 581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | /* Set the current packet command */ |
Bartlomiej Zolnierkiewicz | 2b9efba | 2008-10-13 21:39:31 +0200 | [diff] [blame] | 583 | drive->pc = pc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
| 585 | if (pc->retries > IDETAPE_MAX_PC_RETRIES || |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 586 | (pc->flags & PC_FLAG_ABORT)) { |
Tejun Heo | b3071d1 | 2009-04-19 08:46:02 +0900 | [diff] [blame] | 587 | unsigned int done = blk_rq_bytes(drive->hwif->rq); |
| 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 590 | * We will "abort" retrying a packet command in case legitimate |
| 591 | * error code was received (crossing a filemark, or end of the |
| 592 | * media, for example). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | */ |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 594 | if (!(pc->flags & PC_FLAG_ABORT)) { |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 595 | if (!(pc->c[0] == TEST_UNIT_READY && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | tape->sense_key == 2 && tape->asc == 4 && |
| 597 | (tape->ascq == 1 || tape->ascq == 8))) { |
| 598 | printk(KERN_ERR "ide-tape: %s: I/O error, " |
| 599 | "pc = %2x, key = %2x, " |
| 600 | "asc = %2x, ascq = %2x\n", |
| 601 | tape->name, pc->c[0], |
| 602 | tape->sense_key, tape->asc, |
| 603 | tape->ascq); |
| 604 | } |
| 605 | /* Giving up */ |
Bartlomiej Zolnierkiewicz | c152cc1 | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 606 | pc->error = IDE_DRV_ERROR_GENERAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
Tejun Heo | b3071d1 | 2009-04-19 08:46:02 +0900 | [diff] [blame] | 608 | |
Bartlomiej Zolnierkiewicz | 5e2040fd | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 609 | drive->failed_pc = NULL; |
Bartlomiej Zolnierkiewicz | b14c721 | 2008-10-13 21:39:30 +0200 | [diff] [blame] | 610 | drive->pc_callback(drive, 0); |
Tejun Heo | b3071d1 | 2009-04-19 08:46:02 +0900 | [diff] [blame] | 611 | ide_complete_rq(drive, -EIO, done); |
Bartlomiej Zolnierkiewicz | 92f5daf | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 612 | return ide_stopped; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 614 | debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
| 616 | pc->retries++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 618 | return ide_issue_pc(drive, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | } |
| 620 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 621 | /* A mode sense command is used to "sense" tape parameters. */ |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 622 | static void idetape_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | { |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 624 | ide_init_pc(pc); |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 625 | pc->c[0] = MODE_SENSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | if (page_code != IDETAPE_BLOCK_DESCRIPTOR) |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 627 | /* DBD = 1 - Don't return block descriptors */ |
| 628 | pc->c[1] = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | pc->c[2] = page_code; |
| 630 | /* |
| 631 | * Changed pc->c[3] to 0 (255 will at best return unused info). |
| 632 | * |
| 633 | * For SCSI this byte is defined as subpage instead of high byte |
| 634 | * of length and some IDE drives seem to interpret it this way |
| 635 | * and return an error when 255 is used. |
| 636 | */ |
| 637 | pc->c[3] = 0; |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 638 | /* We will just discard data in that case */ |
| 639 | pc->c[4] = 255; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | if (page_code == IDETAPE_BLOCK_DESCRIPTOR) |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 641 | pc->req_xfer = 12; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | else if (page_code == IDETAPE_CAPABILITIES_PAGE) |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 643 | pc->req_xfer = 24; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | else |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 645 | pc->req_xfer = 50; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | } |
| 647 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 648 | static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
Bartlomiej Zolnierkiewicz | b73c7ee | 2008-07-23 19:55:52 +0200 | [diff] [blame] | 650 | ide_hwif_t *hwif = drive->hwif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | idetape_tape_t *tape = drive->driver_data; |
Bartlomiej Zolnierkiewicz | 2b9efba | 2008-10-13 21:39:31 +0200 | [diff] [blame] | 652 | struct ide_atapi_pc *pc = drive->pc; |
Bartlomiej Zolnierkiewicz | 22c525b | 2008-01-25 22:17:11 +0100 | [diff] [blame] | 653 | u8 stat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | |
Bartlomiej Zolnierkiewicz | 374e042 | 2008-07-23 19:55:56 +0200 | [diff] [blame] | 655 | stat = hwif->tp_ops->read_status(hwif); |
Bartlomiej Zolnierkiewicz | c47137a | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 656 | |
Bartlomiej Zolnierkiewicz | 3a7d248 | 2008-10-10 22:39:21 +0200 | [diff] [blame] | 657 | if (stat & ATA_DSC) { |
| 658 | if (stat & ATA_ERR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | /* Error detected */ |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 660 | if (pc->c[0] != TEST_UNIT_READY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | printk(KERN_ERR "ide-tape: %s: I/O error, ", |
| 662 | tape->name); |
| 663 | /* Retry operation */ |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 664 | ide_retry_pc(drive); |
Bartlomiej Zolnierkiewicz | 258ec41 | 2008-07-15 21:21:55 +0200 | [diff] [blame] | 665 | return ide_stopped; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | } |
| 667 | pc->error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | } else { |
Bartlomiej Zolnierkiewicz | c152cc1 | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 669 | pc->error = IDE_DRV_ERROR_GENERAL; |
Bartlomiej Zolnierkiewicz | 5e2040fd | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 670 | drive->failed_pc = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | } |
Bartlomiej Zolnierkiewicz | b14c721 | 2008-10-13 21:39:30 +0200 | [diff] [blame] | 672 | drive->pc_callback(drive, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | return ide_stopped; |
| 674 | } |
| 675 | |
Borislav Petkov | cd2abbf | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 676 | static void ide_tape_create_rw_cmd(idetape_tape_t *tape, |
Borislav Petkov | 0014c75 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 677 | struct ide_atapi_pc *pc, struct request *rq, |
| 678 | u8 opcode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | { |
Borislav Petkov | 0014c75 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 680 | struct idetape_bh *bh = (struct idetape_bh *)rq->special; |
| 681 | unsigned int length = rq->current_nr_sectors; |
| 682 | |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 683 | ide_init_pc(pc); |
Borislav Petkov | 860ff5e | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 684 | put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | pc->c[1] = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | pc->bh = bh; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 687 | pc->buf = NULL; |
| 688 | pc->buf_size = length * tape->blk_size; |
| 689 | pc->req_xfer = pc->buf_size; |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 690 | if (pc->req_xfer == tape->buffer_size) |
Bartlomiej Zolnierkiewicz | 5e33109 | 2008-07-15 21:21:56 +0200 | [diff] [blame] | 691 | pc->flags |= PC_FLAG_DMA_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
Borislav Petkov | cd2abbf | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 693 | if (opcode == READ_6) { |
| 694 | pc->c[0] = READ_6; |
| 695 | atomic_set(&bh->b_count, 0); |
| 696 | } else if (opcode == WRITE_6) { |
| 697 | pc->c[0] = WRITE_6; |
| 698 | pc->flags |= PC_FLAG_WRITING; |
| 699 | pc->b_data = bh->b_data; |
| 700 | pc->b_count = atomic_read(&bh->b_count); |
| 701 | } |
Borislav Petkov | 0014c75 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 702 | |
| 703 | memcpy(rq->cmd, pc->c, 12); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | } |
| 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | static ide_startstop_t idetape_do_request(ide_drive_t *drive, |
| 707 | struct request *rq, sector_t block) |
| 708 | { |
Bartlomiej Zolnierkiewicz | b73c7ee | 2008-07-23 19:55:52 +0200 | [diff] [blame] | 709 | ide_hwif_t *hwif = drive->hwif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | idetape_tape_t *tape = drive->driver_data; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 711 | struct ide_atapi_pc *pc = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | struct request *postponed_rq = tape->postponed_rq; |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 713 | struct ide_cmd cmd; |
Bartlomiej Zolnierkiewicz | 22c525b | 2008-01-25 22:17:11 +0100 | [diff] [blame] | 714 | u8 stat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
Mark de Wever | 730616b | 2008-10-10 22:39:17 +0200 | [diff] [blame] | 716 | debug_log(DBG_SENSE, "sector: %llu, nr_sectors: %lu," |
| 717 | " current_nr_sectors: %u\n", |
| 718 | (unsigned long long)rq->sector, rq->nr_sectors, |
| 719 | rq->current_nr_sectors); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 721 | if (!(blk_special_request(rq) || blk_sense_request(rq))) { |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 722 | /* We do not support buffer cache originated requests. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | printk(KERN_NOTICE "ide-tape: %s: Unsupported request in " |
Jens Axboe | 4aff5e2 | 2006-08-10 08:44:47 +0200 | [diff] [blame] | 724 | "request queue (%d)\n", drive->name, rq->cmd_type); |
Bartlomiej Zolnierkiewicz | 89f78b32 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 725 | if (blk_fs_request(rq) == 0 && rq->errors == 0) |
| 726 | rq->errors = -EIO; |
Bartlomiej Zolnierkiewicz | 130e886 | 2009-03-27 12:46:45 +0100 | [diff] [blame] | 727 | ide_complete_rq(drive, -EIO, ide_rq_bytes(rq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | return ide_stopped; |
| 729 | } |
| 730 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 731 | /* Retry a failed packet command */ |
Bartlomiej Zolnierkiewicz | 5e2040fd | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 732 | if (drive->failed_pc && drive->pc->c[0] == REQUEST_SENSE) { |
| 733 | pc = drive->failed_pc; |
Bartlomiej Zolnierkiewicz | 28c7214 | 2008-07-15 21:21:59 +0200 | [diff] [blame] | 734 | goto out; |
| 735 | } |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | if (postponed_rq != NULL) |
| 738 | if (rq != postponed_rq) { |
| 739 | printk(KERN_ERR "ide-tape: ide-tape.c bug - " |
| 740 | "Two DSC requests were queued\n"); |
Bartlomiej Zolnierkiewicz | 313afea | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 741 | drive->failed_pc = NULL; |
Bartlomiej Zolnierkiewicz | 6902a53 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 742 | rq->errors = 0; |
Bartlomiej Zolnierkiewicz | f974b19 | 2009-03-27 12:46:44 +0100 | [diff] [blame] | 743 | ide_complete_rq(drive, 0, blk_rq_bytes(rq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | return ide_stopped; |
| 745 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
| 747 | tape->postponed_rq = NULL; |
| 748 | |
| 749 | /* |
| 750 | * If the tape is still busy, postpone our request and service |
| 751 | * the other device meanwhile. |
| 752 | */ |
Bartlomiej Zolnierkiewicz | 374e042 | 2008-07-23 19:55:56 +0200 | [diff] [blame] | 753 | stat = hwif->tp_ops->read_status(hwif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 755 | if ((drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) == 0 && |
| 756 | (rq->cmd[13] & REQ_IDETAPE_PC2) == 0) |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 757 | set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 759 | if (drive->dev_flags & IDE_DFLAG_POST_RESET) { |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 760 | set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags); |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 761 | drive->dev_flags &= ~IDE_DFLAG_POST_RESET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | } |
| 763 | |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 764 | if (!test_and_clear_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags) && |
Bartlomiej Zolnierkiewicz | 3a7d248 | 2008-10-10 22:39:21 +0200 | [diff] [blame] | 765 | (stat & ATA_DSC) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | if (postponed_rq == NULL) { |
| 767 | tape->dsc_polling_start = jiffies; |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 768 | tape->dsc_poll_freq = tape->best_dsc_rw_freq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | tape->dsc_timeout = jiffies + IDETAPE_DSC_RW_TIMEOUT; |
| 770 | } else if (time_after(jiffies, tape->dsc_timeout)) { |
| 771 | printk(KERN_ERR "ide-tape: %s: DSC timeout\n", |
| 772 | tape->name); |
Borislav Petkov | 83dd573 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 773 | if (rq->cmd[13] & REQ_IDETAPE_PC2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | idetape_media_access_finished(drive); |
| 775 | return ide_stopped; |
| 776 | } else { |
| 777 | return ide_do_reset(drive); |
| 778 | } |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 779 | } else if (time_after(jiffies, |
| 780 | tape->dsc_polling_start + |
| 781 | IDETAPE_DSC_MA_THRESHOLD)) |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 782 | tape->dsc_poll_freq = IDETAPE_DSC_MA_SLOW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | idetape_postpone_request(drive); |
| 784 | return ide_stopped; |
| 785 | } |
Borislav Petkov | 83dd573 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 786 | if (rq->cmd[13] & REQ_IDETAPE_READ) { |
Bartlomiej Zolnierkiewicz | 2e8a6f8 | 2008-10-10 22:39:36 +0200 | [diff] [blame] | 787 | pc = &tape->queued_pc; |
Borislav Petkov | 0014c75 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 788 | ide_tape_create_rw_cmd(tape, pc, rq, READ_6); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | goto out; |
| 790 | } |
Borislav Petkov | 83dd573 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 791 | if (rq->cmd[13] & REQ_IDETAPE_WRITE) { |
Bartlomiej Zolnierkiewicz | 2e8a6f8 | 2008-10-10 22:39:36 +0200 | [diff] [blame] | 792 | pc = &tape->queued_pc; |
Borislav Petkov | 0014c75 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 793 | ide_tape_create_rw_cmd(tape, pc, rq, WRITE_6); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | goto out; |
| 795 | } |
Borislav Petkov | 83dd573 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 796 | if (rq->cmd[13] & REQ_IDETAPE_PC1) { |
Tejun Heo | c267cc1 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 797 | pc = (struct ide_atapi_pc *)rq->special; |
Borislav Petkov | 83dd573 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 798 | rq->cmd[13] &= ~(REQ_IDETAPE_PC1); |
| 799 | rq->cmd[13] |= REQ_IDETAPE_PC2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | goto out; |
| 801 | } |
Borislav Petkov | 83dd573 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 802 | if (rq->cmd[13] & REQ_IDETAPE_PC2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | idetape_media_access_finished(drive); |
| 804 | return ide_stopped; |
| 805 | } |
| 806 | BUG(); |
Bartlomiej Zolnierkiewicz | 28c7214 | 2008-07-15 21:21:59 +0200 | [diff] [blame] | 807 | |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 808 | out: |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 809 | /* prepare sense request for this command */ |
| 810 | ide_prep_sense(drive, rq); |
| 811 | |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 812 | memset(&cmd, 0, sizeof(cmd)); |
| 813 | |
| 814 | if (rq_data_dir(rq)) |
| 815 | cmd.tf_flags |= IDE_TFLAG_WRITE; |
| 816 | |
| 817 | cmd.rq = rq; |
| 818 | |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 819 | ide_init_sg_cmd(&cmd, pc->req_xfer); |
| 820 | ide_map_sg(drive, &cmd); |
| 821 | |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 822 | return ide_tape_issue_pc(drive, &cmd, pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | } |
| 824 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | /* |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 826 | * It returns a pointer to the newly allocated buffer, or NULL in case |
| 827 | * of failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | */ |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 829 | static struct idetape_bh *ide_tape_kmalloc_buffer(idetape_tape_t *tape, |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 830 | int full) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | { |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 832 | struct idetape_bh *bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 834 | bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL); |
| 835 | if (!bh) |
| 836 | return NULL; |
Borislav Petkov | 41aa170 | 2008-04-27 15:38:32 +0200 | [diff] [blame] | 837 | |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 838 | bh->b_data = kmalloc(tape->buffer_size, GFP_KERNEL); |
| 839 | if (!bh->b_data) { |
| 840 | kfree(bh); |
| 841 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | } |
Borislav Petkov | 41aa170 | 2008-04-27 15:38:32 +0200 | [diff] [blame] | 843 | |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 844 | bh->b_size = tape->buffer_size; |
| 845 | atomic_set(&bh->b_count, full ? bh->b_size : 0); |
| 846 | |
| 847 | return bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | } |
| 849 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 850 | static int idetape_copy_stage_from_user(idetape_tape_t *tape, |
Borislav Petkov | 8646c88 | 2008-04-27 15:38:26 +0200 | [diff] [blame] | 851 | const char __user *buf, int n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | { |
| 853 | struct idetape_bh *bh = tape->bh; |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 854 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 856 | if (n) { |
| 857 | if (bh == NULL || n > bh->b_size - atomic_read(&bh->b_count)) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 858 | printk(KERN_ERR "ide-tape: bh == NULL in %s\n", |
| 859 | __func__); |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 860 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | } |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 862 | if (copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 863 | n)) |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 864 | ret = 1; |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 865 | atomic_add(n, &bh->b_count); |
| 866 | if (atomic_read(&bh->b_count) == bh->b_size) |
| 867 | tape->bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | } |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 869 | |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 870 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | } |
| 872 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 873 | static int idetape_copy_stage_to_user(idetape_tape_t *tape, char __user *buf, |
Borislav Petkov | 99d74e6 | 2008-04-27 15:38:25 +0200 | [diff] [blame] | 874 | int n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | { |
| 876 | struct idetape_bh *bh = tape->bh; |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 877 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 879 | if (n) { |
| 880 | if (bh == NULL || n > tape->b_count) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 881 | printk(KERN_ERR "ide-tape: bh == NULL in %s\n", |
| 882 | __func__); |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 883 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | } |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 885 | if (copy_to_user(buf, tape->b_data, n)) |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 886 | ret = 1; |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 887 | tape->b_data += n; |
| 888 | tape->b_count -= n; |
| 889 | if (!tape->b_count) |
| 890 | tape->bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | } |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 892 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | } |
| 894 | |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 895 | static void idetape_init_merge_buffer(idetape_tape_t *tape) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | { |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 897 | struct idetape_bh *bh = tape->merge_bh; |
| 898 | tape->bh = tape->merge_bh; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 899 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 900 | if (tape->chrdev_dir == IDETAPE_DIR_WRITE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | atomic_set(&bh->b_count, 0); |
| 902 | else { |
| 903 | tape->b_data = bh->b_data; |
| 904 | tape->b_count = atomic_read(&bh->b_count); |
| 905 | } |
| 906 | } |
| 907 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 909 | * Write a filemark if write_filemark=1. Flush the device buffers without |
| 910 | * writing a filemark otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 912 | static void idetape_create_write_filemark_cmd(ide_drive_t *drive, |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 913 | struct ide_atapi_pc *pc, int write_filemark) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | { |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 915 | ide_init_pc(pc); |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 916 | pc->c[0] = WRITE_FILEMARKS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | pc->c[4] = write_filemark; |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 918 | pc->flags |= PC_FLAG_WAIT_FOR_DSC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | } |
| 920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | static int idetape_wait_ready(ide_drive_t *drive, unsigned long timeout) |
| 922 | { |
| 923 | idetape_tape_t *tape = drive->driver_data; |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 924 | struct gendisk *disk = tape->disk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | int load_attempted = 0; |
| 926 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 927 | /* Wait for the tape to become ready */ |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 928 | set_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | timeout += jiffies; |
| 930 | while (time_before(jiffies, timeout)) { |
Bartlomiej Zolnierkiewicz | de699ad | 2008-10-10 22:39:39 +0200 | [diff] [blame] | 931 | if (ide_do_test_unit_ready(drive, disk) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | return 0; |
| 933 | if ((tape->sense_key == 2 && tape->asc == 4 && tape->ascq == 2) |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 934 | || (tape->asc == 0x3A)) { |
| 935 | /* no media */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | if (load_attempted) |
| 937 | return -ENOMEDIUM; |
Bartlomiej Zolnierkiewicz | 0c8a6c7 | 2008-10-10 22:39:39 +0200 | [diff] [blame] | 938 | ide_do_start_stop(drive, disk, IDETAPE_LU_LOAD_MASK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | load_attempted = 1; |
| 940 | /* not about to be ready */ |
| 941 | } else if (!(tape->sense_key == 2 && tape->asc == 4 && |
| 942 | (tape->ascq == 1 || tape->ascq == 8))) |
| 943 | return -EIO; |
Nishanth Aravamudan | 80ce45f | 2005-09-10 00:27:08 -0700 | [diff] [blame] | 944 | msleep(100); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | } |
| 946 | return -EIO; |
| 947 | } |
| 948 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 949 | static int idetape_flush_tape_buffers(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | { |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 951 | struct ide_tape_obj *tape = drive->driver_data; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 952 | struct ide_atapi_pc pc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | int rc; |
| 954 | |
| 955 | idetape_create_write_filemark_cmd(drive, &pc, 0); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 956 | rc = ide_queue_pc_tail(drive, tape->disk, &pc); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 957 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | return rc; |
| 959 | idetape_wait_ready(drive, 60 * 5 * HZ); |
| 960 | return 0; |
| 961 | } |
| 962 | |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 963 | static void idetape_create_read_position_cmd(struct ide_atapi_pc *pc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | { |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 965 | ide_init_pc(pc); |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 966 | pc->c[0] = READ_POSITION; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 967 | pc->req_xfer = 20; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | } |
| 969 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 970 | static int idetape_read_position(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | { |
| 972 | idetape_tape_t *tape = drive->driver_data; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 973 | struct ide_atapi_pc pc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | int position; |
| 975 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 976 | debug_log(DBG_PROCS, "Enter %s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | |
| 978 | idetape_create_read_position_cmd(&pc); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 979 | if (ide_queue_pc_tail(drive, tape->disk, &pc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | return -1; |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 981 | position = tape->first_frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | return position; |
| 983 | } |
| 984 | |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 985 | static void idetape_create_locate_cmd(ide_drive_t *drive, |
| 986 | struct ide_atapi_pc *pc, |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 987 | unsigned int block, u8 partition, int skip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | { |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 989 | ide_init_pc(pc); |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 990 | pc->c[0] = POSITION_TO_ELEMENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | pc->c[1] = 2; |
Borislav Petkov | 860ff5e | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 992 | put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | pc->c[8] = partition; |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 994 | pc->flags |= PC_FLAG_WAIT_FOR_DSC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | } |
| 996 | |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 997 | static void __ide_tape_discard_merge_buffer(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | { |
| 999 | idetape_tape_t *tape = drive->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1001 | if (tape->chrdev_dir != IDETAPE_DIR_READ) |
Borislav Petkov | 9798630 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1002 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1004 | clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags); |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1005 | tape->merge_bh_size = 0; |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1006 | if (tape->merge_bh != NULL) { |
| 1007 | ide_tape_kfree_buffer(tape); |
| 1008 | tape->merge_bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | } |
| 1010 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1011 | tape->chrdev_dir = IDETAPE_DIR_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | } |
| 1013 | |
| 1014 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1015 | * Position the tape to the requested block using the LOCATE packet command. |
| 1016 | * A READ POSITION command is then issued to check where we are positioned. Like |
| 1017 | * all higher level operations, we queue the commands at the tail of the request |
| 1018 | * queue and wait for their completion. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1020 | static int idetape_position_tape(ide_drive_t *drive, unsigned int block, |
| 1021 | u8 partition, int skip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | { |
| 1023 | idetape_tape_t *tape = drive->driver_data; |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1024 | struct gendisk *disk = tape->disk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | int retval; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1026 | struct ide_atapi_pc pc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1028 | if (tape->chrdev_dir == IDETAPE_DIR_READ) |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1029 | __ide_tape_discard_merge_buffer(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | idetape_wait_ready(drive, 60 * 5 * HZ); |
| 1031 | idetape_create_locate_cmd(drive, &pc, block, partition, skip); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1032 | retval = ide_queue_pc_tail(drive, disk, &pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | if (retval) |
| 1034 | return (retval); |
| 1035 | |
| 1036 | idetape_create_read_position_cmd(&pc); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1037 | return ide_queue_pc_tail(drive, disk, &pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } |
| 1039 | |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1040 | static void ide_tape_discard_merge_buffer(ide_drive_t *drive, |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1041 | int restore_position) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | { |
| 1043 | idetape_tape_t *tape = drive->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | int seek, position; |
| 1045 | |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1046 | __ide_tape_discard_merge_buffer(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | if (restore_position) { |
| 1048 | position = idetape_read_position(drive); |
Borislav Petkov | 9798630 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1049 | seek = position > 0 ? position : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | if (idetape_position_tape(drive, seek, 0, 0)) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1051 | printk(KERN_INFO "ide-tape: %s: position_tape failed in" |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1052 | " %s\n", tape->name, __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | return; |
| 1054 | } |
| 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1059 | * Generate a read/write request for the block device interface and wait for it |
| 1060 | * to be serviced. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1062 | static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks, |
| 1063 | struct idetape_bh *bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | { |
| 1065 | idetape_tape_t *tape = drive->driver_data; |
FUJITA Tomonori | 64ea1b4 | 2008-07-15 21:21:43 +0200 | [diff] [blame] | 1066 | struct request *rq; |
| 1067 | int ret, errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1069 | debug_log(DBG_SENSE, "%s: cmd=%d\n", __func__, cmd); |
| 1070 | |
FUJITA Tomonori | 64ea1b4 | 2008-07-15 21:21:43 +0200 | [diff] [blame] | 1071 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| 1072 | rq->cmd_type = REQ_TYPE_SPECIAL; |
Borislav Petkov | 83dd573 | 2008-07-23 19:56:00 +0200 | [diff] [blame] | 1073 | rq->cmd[13] = cmd; |
FUJITA Tomonori | 64ea1b4 | 2008-07-15 21:21:43 +0200 | [diff] [blame] | 1074 | rq->rq_disk = tape->disk; |
| 1075 | rq->special = (void *)bh; |
| 1076 | rq->sector = tape->first_frame; |
| 1077 | rq->nr_sectors = blocks; |
| 1078 | rq->current_nr_sectors = blocks; |
| 1079 | blk_execute_rq(drive->queue, tape->disk, rq, 0); |
| 1080 | |
| 1081 | errors = rq->errors; |
| 1082 | ret = tape->blk_size * (blocks - rq->current_nr_sectors); |
| 1083 | blk_put_request(rq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | |
| 1085 | if ((cmd & (REQ_IDETAPE_READ | REQ_IDETAPE_WRITE)) == 0) |
| 1086 | return 0; |
| 1087 | |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1088 | if (tape->merge_bh) |
| 1089 | idetape_init_merge_buffer(tape); |
Bartlomiej Zolnierkiewicz | c152cc1 | 2009-03-27 12:46:34 +0100 | [diff] [blame] | 1090 | if (errors == IDE_DRV_ERROR_GENERAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | return -EIO; |
FUJITA Tomonori | 64ea1b4 | 2008-07-15 21:21:43 +0200 | [diff] [blame] | 1092 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | } |
| 1094 | |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1095 | static void idetape_create_inquiry_cmd(struct ide_atapi_pc *pc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | { |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 1097 | ide_init_pc(pc); |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1098 | pc->c[0] = INQUIRY; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1099 | pc->c[4] = 254; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1100 | pc->req_xfer = 254; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | } |
| 1102 | |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1103 | static void idetape_create_rewind_cmd(ide_drive_t *drive, |
| 1104 | struct ide_atapi_pc *pc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | { |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 1106 | ide_init_pc(pc); |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1107 | pc->c[0] = REZERO_UNIT; |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 1108 | pc->flags |= PC_FLAG_WAIT_FOR_DSC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | } |
| 1110 | |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1111 | static void idetape_create_erase_cmd(struct ide_atapi_pc *pc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | { |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 1113 | ide_init_pc(pc); |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1114 | pc->c[0] = ERASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | pc->c[1] = 1; |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 1116 | pc->flags |= PC_FLAG_WAIT_FOR_DSC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | } |
| 1118 | |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1119 | static void idetape_create_space_cmd(struct ide_atapi_pc *pc, int count, u8 cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | { |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 1121 | ide_init_pc(pc); |
Borislav Petkov | 90699ce | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1122 | pc->c[0] = SPACE; |
Borislav Petkov | 860ff5e | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1123 | put_unaligned(cpu_to_be32(count), (unsigned int *) &pc->c[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | pc->c[1] = cmd; |
Borislav Petkov | 346331f | 2008-04-18 00:46:26 +0200 | [diff] [blame] | 1125 | pc->flags |= PC_FLAG_WAIT_FOR_DSC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | } |
| 1127 | |
Borislav Petkov | 97c566c | 2008-04-27 15:38:25 +0200 | [diff] [blame] | 1128 | /* Queue up a character device originated write request. */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1129 | static int idetape_add_chrdev_write_request(ide_drive_t *drive, int blocks) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | { |
| 1131 | idetape_tape_t *tape = drive->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1133 | debug_log(DBG_CHRDEV, "Enter %s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | |
Borislav Petkov | 0aa4b01 | 2008-04-27 15:38:27 +0200 | [diff] [blame] | 1135 | return idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1136 | blocks, tape->merge_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | } |
| 1138 | |
Borislav Petkov | d9df937 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1139 | static void ide_tape_flush_merge_buffer(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | { |
| 1141 | idetape_tape_t *tape = drive->driver_data; |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 1142 | int blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | struct idetape_bh *bh; |
Borislav Petkov | 55a5d29 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1144 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1145 | if (tape->chrdev_dir != IDETAPE_DIR_WRITE) { |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1146 | printk(KERN_ERR "ide-tape: bug: Trying to empty merge buffer" |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1147 | " but we are not writing.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | return; |
| 1149 | } |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1150 | if (tape->merge_bh_size > tape->buffer_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | printk(KERN_ERR "ide-tape: bug: merge_buffer too big\n"); |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1152 | tape->merge_bh_size = tape->buffer_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | } |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1154 | if (tape->merge_bh_size) { |
| 1155 | blocks = tape->merge_bh_size / tape->blk_size; |
| 1156 | if (tape->merge_bh_size % tape->blk_size) { |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 1157 | unsigned int i = tape->blk_size - |
| 1158 | tape->merge_bh_size % tape->blk_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | blocks++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | bh = tape->bh; |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 1161 | if (bh) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1162 | memset(bh->b_data + atomic_read(&bh->b_count), |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 1163 | 0, i); |
| 1164 | atomic_add(i, &bh->b_count); |
| 1165 | } else |
| 1166 | printk(KERN_INFO "ide-tape: bug, bh NULL\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | } |
| 1168 | (void) idetape_add_chrdev_write_request(drive, blocks); |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1169 | tape->merge_bh_size = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | } |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1171 | if (tape->merge_bh != NULL) { |
| 1172 | ide_tape_kfree_buffer(tape); |
| 1173 | tape->merge_bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | } |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1175 | tape->chrdev_dir = IDETAPE_DIR_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | } |
| 1177 | |
Borislav Petkov | 83042b2 | 2008-04-27 15:38:27 +0200 | [diff] [blame] | 1178 | static int idetape_init_read(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | { |
| 1180 | idetape_tape_t *tape = drive->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | int bytes_read; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | |
| 1183 | /* Initialize read operation */ |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1184 | if (tape->chrdev_dir != IDETAPE_DIR_READ) { |
| 1185 | if (tape->chrdev_dir == IDETAPE_DIR_WRITE) { |
Borislav Petkov | d9df937 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1186 | ide_tape_flush_merge_buffer(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | idetape_flush_tape_buffers(drive); |
| 1188 | } |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1189 | if (tape->merge_bh || tape->merge_bh_size) { |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1190 | printk(KERN_ERR "ide-tape: merge_bh_size should be" |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1191 | " 0 now\n"); |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1192 | tape->merge_bh_size = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | } |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 1194 | tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0); |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1195 | if (!tape->merge_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | return -ENOMEM; |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1197 | tape->chrdev_dir = IDETAPE_DIR_READ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | |
| 1199 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1200 | * Issue a read 0 command to ensure that DSC handshake is |
| 1201 | * switched from completion mode to buffer available mode. |
| 1202 | * No point in issuing this if DSC overlap isn't supported, some |
| 1203 | * drives (Seagate STT3401A) will return an error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | */ |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 1205 | if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1206 | bytes_read = idetape_queue_rw_tail(drive, |
| 1207 | REQ_IDETAPE_READ, 0, |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1208 | tape->merge_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | if (bytes_read < 0) { |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1210 | ide_tape_kfree_buffer(tape); |
| 1211 | tape->merge_bh = NULL; |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1212 | tape->chrdev_dir = IDETAPE_DIR_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | return bytes_read; |
| 1214 | } |
| 1215 | } |
| 1216 | } |
Borislav Petkov | 5e69bd9 | 2008-04-27 15:38:25 +0200 | [diff] [blame] | 1217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | return 0; |
| 1219 | } |
| 1220 | |
Borislav Petkov | 5bd50dc | 2008-04-27 15:38:28 +0200 | [diff] [blame] | 1221 | /* called from idetape_chrdev_read() to service a chrdev read request. */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1222 | static int idetape_add_chrdev_read_request(ide_drive_t *drive, int blocks) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | { |
| 1224 | idetape_tape_t *tape = drive->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1226 | debug_log(DBG_PROCS, "Enter %s, %d blocks\n", __func__, blocks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1228 | /* If we are at a filemark, return a read length of 0 */ |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1229 | if (test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | return 0; |
| 1231 | |
Borislav Petkov | 83042b2 | 2008-04-27 15:38:27 +0200 | [diff] [blame] | 1232 | idetape_init_read(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | |
Borislav Petkov | 5e69bd9 | 2008-04-27 15:38:25 +0200 | [diff] [blame] | 1234 | return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks, |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1235 | tape->merge_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | } |
| 1237 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1238 | static void idetape_pad_zeros(ide_drive_t *drive, int bcount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | { |
| 1240 | idetape_tape_t *tape = drive->driver_data; |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 1241 | struct idetape_bh *bh = tape->merge_bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | int blocks; |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | while (bcount) { |
| 1245 | unsigned int count; |
| 1246 | |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 1247 | count = min(tape->buffer_size, bcount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | bcount -= count; |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1249 | blocks = count / tape->blk_size; |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 1250 | atomic_set(&bh->b_count, count); |
| 1251 | memset(bh->b_data, 0, atomic_read(&bh->b_count)); |
| 1252 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1253 | idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, blocks, |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1254 | tape->merge_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | } |
| 1256 | } |
| 1257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1259 | * Rewinds the tape to the Beginning Of the current Partition (BOP). We |
| 1260 | * currently support only one partition. |
| 1261 | */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1262 | static int idetape_rewind_tape(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | { |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1264 | struct ide_tape_obj *tape = drive->driver_data; |
| 1265 | struct gendisk *disk = tape->disk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | int retval; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1267 | struct ide_atapi_pc pc; |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1268 | |
| 1269 | debug_log(DBG_SENSE, "Enter %s\n", __func__); |
| 1270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | idetape_create_rewind_cmd(drive, &pc); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1272 | retval = ide_queue_pc_tail(drive, disk, &pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | if (retval) |
| 1274 | return retval; |
| 1275 | |
| 1276 | idetape_create_read_position_cmd(&pc); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1277 | retval = ide_queue_pc_tail(drive, disk, &pc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | if (retval) |
| 1279 | return retval; |
| 1280 | return 0; |
| 1281 | } |
| 1282 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1283 | /* mtio.h compatible commands should be issued to the chrdev interface. */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1284 | static int idetape_blkdev_ioctl(ide_drive_t *drive, unsigned int cmd, |
| 1285 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | { |
| 1287 | idetape_tape_t *tape = drive->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | void __user *argp = (void __user *)arg; |
| 1289 | |
Borislav Petkov | d59823f | 2008-02-02 19:56:51 +0100 | [diff] [blame] | 1290 | struct idetape_config { |
| 1291 | int dsc_rw_frequency; |
| 1292 | int dsc_media_access_frequency; |
| 1293 | int nr_stages; |
| 1294 | } config; |
| 1295 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1296 | debug_log(DBG_PROCS, "Enter %s\n", __func__); |
| 1297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | switch (cmd) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1299 | case 0x0340: |
| 1300 | if (copy_from_user(&config, argp, sizeof(config))) |
| 1301 | return -EFAULT; |
| 1302 | tape->best_dsc_rw_freq = config.dsc_rw_frequency; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1303 | break; |
| 1304 | case 0x0350: |
| 1305 | config.dsc_rw_frequency = (int) tape->best_dsc_rw_freq; |
Borislav Petkov | 83042b2 | 2008-04-27 15:38:27 +0200 | [diff] [blame] | 1306 | config.nr_stages = 1; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1307 | if (copy_to_user(argp, &config, sizeof(config))) |
| 1308 | return -EFAULT; |
| 1309 | break; |
| 1310 | default: |
| 1311 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | } |
| 1313 | return 0; |
| 1314 | } |
| 1315 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1316 | static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op, |
| 1317 | int mt_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | { |
| 1319 | idetape_tape_t *tape = drive->driver_data; |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1320 | struct gendisk *disk = tape->disk; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1321 | struct ide_atapi_pc pc; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1322 | int retval, count = 0; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1323 | int sprev = !!(tape->caps[4] & 0x20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | |
| 1325 | if (mt_count == 0) |
| 1326 | return 0; |
| 1327 | if (MTBSF == mt_op || MTBSFM == mt_op) { |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1328 | if (!sprev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | return -EIO; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1330 | mt_count = -mt_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | } |
| 1332 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1333 | if (tape->chrdev_dir == IDETAPE_DIR_READ) { |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1334 | tape->merge_bh_size = 0; |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1335 | if (test_and_clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | ++count; |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1337 | ide_tape_discard_merge_buffer(drive, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | } |
| 1339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | switch (mt_op) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1341 | case MTFSF: |
| 1342 | case MTBSF: |
| 1343 | idetape_create_space_cmd(&pc, mt_count - count, |
| 1344 | IDETAPE_SPACE_OVER_FILEMARK); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1345 | return ide_queue_pc_tail(drive, disk, &pc); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1346 | case MTFSFM: |
| 1347 | case MTBSFM: |
| 1348 | if (!sprev) |
| 1349 | return -EIO; |
| 1350 | retval = idetape_space_over_filemarks(drive, MTFSF, |
| 1351 | mt_count - count); |
| 1352 | if (retval) |
| 1353 | return retval; |
| 1354 | count = (MTBSFM == mt_op ? 1 : -1); |
| 1355 | return idetape_space_over_filemarks(drive, MTFSF, count); |
| 1356 | default: |
| 1357 | printk(KERN_ERR "ide-tape: MTIO operation %d not supported\n", |
| 1358 | mt_op); |
| 1359 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | } |
| 1361 | } |
| 1362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1364 | * Our character device read / write functions. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1366 | * The tape is optimized to maximize throughput when it is transferring an |
| 1367 | * integral number of the "continuous transfer limit", which is a parameter of |
| 1368 | * the specific tape (26kB on my particular tape, 32kB for Onstream). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1370 | * As of version 1.3 of the driver, the character device provides an abstract |
| 1371 | * continuous view of the media - any mix of block sizes (even 1 byte) on the |
| 1372 | * same backup/restore procedure is supported. The driver will internally |
| 1373 | * convert the requests to the recommended transfer unit, so that an unmatch |
| 1374 | * between the user's block size to the recommended size will only result in a |
| 1375 | * (slightly) increased driver overhead, but will no longer hit performance. |
| 1376 | * This is not applicable to Onstream. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1378 | static ssize_t idetape_chrdev_read(struct file *file, char __user *buf, |
| 1379 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | { |
Borislav Petkov | 5aeddf9 | 2008-10-13 21:39:34 +0200 | [diff] [blame] | 1381 | struct ide_tape_obj *tape = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | ide_drive_t *drive = tape->drive; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1383 | ssize_t bytes_read, temp, actually_read = 0, rc; |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1384 | ssize_t ret = 0; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1385 | u16 ctl = *(u16 *)&tape->caps[12]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1387 | debug_log(DBG_CHRDEV, "Enter %s, count %Zd\n", __func__, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1389 | if (tape->chrdev_dir != IDETAPE_DIR_READ) { |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1390 | if (test_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags)) |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1391 | if (count > tape->blk_size && |
| 1392 | (count % tape->blk_size) == 0) |
| 1393 | tape->user_bs_factor = count / tape->blk_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | } |
Borislav Petkov | 83042b2 | 2008-04-27 15:38:27 +0200 | [diff] [blame] | 1395 | rc = idetape_init_read(drive); |
Borislav Petkov | 8d06bfa | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1396 | if (rc < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | return rc; |
| 1398 | if (count == 0) |
| 1399 | return (0); |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1400 | if (tape->merge_bh_size) { |
| 1401 | actually_read = min((unsigned int)(tape->merge_bh_size), |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1402 | (unsigned int)count); |
Borislav Petkov | 99d74e6 | 2008-04-27 15:38:25 +0200 | [diff] [blame] | 1403 | if (idetape_copy_stage_to_user(tape, buf, actually_read)) |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1404 | ret = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | buf += actually_read; |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1406 | tape->merge_bh_size -= actually_read; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | count -= actually_read; |
| 1408 | } |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 1409 | while (count >= tape->buffer_size) { |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1410 | bytes_read = idetape_add_chrdev_read_request(drive, ctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | if (bytes_read <= 0) |
| 1412 | goto finish; |
Borislav Petkov | 99d74e6 | 2008-04-27 15:38:25 +0200 | [diff] [blame] | 1413 | if (idetape_copy_stage_to_user(tape, buf, bytes_read)) |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1414 | ret = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | buf += bytes_read; |
| 1416 | count -= bytes_read; |
| 1417 | actually_read += bytes_read; |
| 1418 | } |
| 1419 | if (count) { |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1420 | bytes_read = idetape_add_chrdev_read_request(drive, ctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | if (bytes_read <= 0) |
| 1422 | goto finish; |
| 1423 | temp = min((unsigned long)count, (unsigned long)bytes_read); |
Borislav Petkov | 99d74e6 | 2008-04-27 15:38:25 +0200 | [diff] [blame] | 1424 | if (idetape_copy_stage_to_user(tape, buf, temp)) |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1425 | ret = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | actually_read += temp; |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1427 | tape->merge_bh_size = bytes_read-temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | } |
| 1429 | finish: |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1430 | if (!actually_read && test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags)) { |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1431 | debug_log(DBG_SENSE, "%s: spacing over filemark\n", tape->name); |
| 1432 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | idetape_space_over_filemarks(drive, MTFSF, 1); |
| 1434 | return 0; |
| 1435 | } |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1436 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1437 | return ret ? ret : actually_read; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | } |
| 1439 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1440 | static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | size_t count, loff_t *ppos) |
| 1442 | { |
Borislav Petkov | 5aeddf9 | 2008-10-13 21:39:34 +0200 | [diff] [blame] | 1443 | struct ide_tape_obj *tape = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | ide_drive_t *drive = tape->drive; |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1445 | ssize_t actually_written = 0; |
| 1446 | ssize_t ret = 0; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1447 | u16 ctl = *(u16 *)&tape->caps[12]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | |
| 1449 | /* The drive is write protected. */ |
| 1450 | if (tape->write_prot) |
| 1451 | return -EACCES; |
| 1452 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1453 | debug_log(DBG_CHRDEV, "Enter %s, count %Zd\n", __func__, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | |
| 1455 | /* Initialize write operation */ |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1456 | if (tape->chrdev_dir != IDETAPE_DIR_WRITE) { |
| 1457 | if (tape->chrdev_dir == IDETAPE_DIR_READ) |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1458 | ide_tape_discard_merge_buffer(drive, 1); |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1459 | if (tape->merge_bh || tape->merge_bh_size) { |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1460 | printk(KERN_ERR "ide-tape: merge_bh_size " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | "should be 0 now\n"); |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1462 | tape->merge_bh_size = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | } |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 1464 | tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0); |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1465 | if (!tape->merge_bh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | return -ENOMEM; |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1467 | tape->chrdev_dir = IDETAPE_DIR_WRITE; |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1468 | idetape_init_merge_buffer(tape); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | |
| 1470 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1471 | * Issue a write 0 command to ensure that DSC handshake is |
| 1472 | * switched from completion mode to buffer available mode. No |
| 1473 | * point in issuing this if DSC overlap isn't supported, some |
| 1474 | * drives (Seagate STT3401A) will return an error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | */ |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 1476 | if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1477 | ssize_t retval = idetape_queue_rw_tail(drive, |
| 1478 | REQ_IDETAPE_WRITE, 0, |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1479 | tape->merge_bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | if (retval < 0) { |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1481 | ide_tape_kfree_buffer(tape); |
| 1482 | tape->merge_bh = NULL; |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1483 | tape->chrdev_dir = IDETAPE_DIR_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | return retval; |
| 1485 | } |
| 1486 | } |
| 1487 | } |
| 1488 | if (count == 0) |
| 1489 | return (0); |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1490 | if (tape->merge_bh_size) { |
| 1491 | if (tape->merge_bh_size >= tape->buffer_size) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1492 | printk(KERN_ERR "ide-tape: bug: merge buf too big\n"); |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1493 | tape->merge_bh_size = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | } |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1495 | actually_written = min((unsigned int) |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1496 | (tape->buffer_size - tape->merge_bh_size), |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1497 | (unsigned int)count); |
Borislav Petkov | 8646c88 | 2008-04-27 15:38:26 +0200 | [diff] [blame] | 1498 | if (idetape_copy_stage_from_user(tape, buf, actually_written)) |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1499 | ret = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | buf += actually_written; |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1501 | tape->merge_bh_size += actually_written; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | count -= actually_written; |
| 1503 | |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1504 | if (tape->merge_bh_size == tape->buffer_size) { |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1505 | ssize_t retval; |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1506 | tape->merge_bh_size = 0; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1507 | retval = idetape_add_chrdev_write_request(drive, ctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | if (retval <= 0) |
| 1509 | return (retval); |
| 1510 | } |
| 1511 | } |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 1512 | while (count >= tape->buffer_size) { |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1513 | ssize_t retval; |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 1514 | if (idetape_copy_stage_from_user(tape, buf, tape->buffer_size)) |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1515 | ret = -EFAULT; |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 1516 | buf += tape->buffer_size; |
| 1517 | count -= tape->buffer_size; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1518 | retval = idetape_add_chrdev_write_request(drive, ctl); |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 1519 | actually_written += tape->buffer_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | if (retval <= 0) |
| 1521 | return (retval); |
| 1522 | } |
| 1523 | if (count) { |
| 1524 | actually_written += count; |
Borislav Petkov | 8646c88 | 2008-04-27 15:38:26 +0200 | [diff] [blame] | 1525 | if (idetape_copy_stage_from_user(tape, buf, count)) |
Daniel Walker | dcd9637 | 2006-06-25 05:47:37 -0700 | [diff] [blame] | 1526 | ret = -EFAULT; |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1527 | tape->merge_bh_size += count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | } |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1529 | return ret ? ret : actually_written; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | } |
| 1531 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1532 | static int idetape_write_filemark(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | { |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1534 | struct ide_tape_obj *tape = drive->driver_data; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1535 | struct ide_atapi_pc pc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | |
| 1537 | /* Write a filemark */ |
| 1538 | idetape_create_write_filemark_cmd(drive, &pc, 1); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1539 | if (ide_queue_pc_tail(drive, tape->disk, &pc)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | printk(KERN_ERR "ide-tape: Couldn't write a filemark\n"); |
| 1541 | return -EIO; |
| 1542 | } |
| 1543 | return 0; |
| 1544 | } |
| 1545 | |
| 1546 | /* |
Borislav Petkov | d99c9da | 2008-02-02 19:56:51 +0100 | [diff] [blame] | 1547 | * Called from idetape_chrdev_ioctl when the general mtio MTIOCTOP ioctl is |
| 1548 | * requested. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | * |
Borislav Petkov | d99c9da | 2008-02-02 19:56:51 +0100 | [diff] [blame] | 1550 | * Note: MTBSF and MTBSFM are not supported when the tape doesn't support |
| 1551 | * spacing over filemarks in the reverse direction. In this case, MTFSFM is also |
Borislav Petkov | 5bd50dc | 2008-04-27 15:38:28 +0200 | [diff] [blame] | 1552 | * usually not supported. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | * |
Borislav Petkov | d99c9da | 2008-02-02 19:56:51 +0100 | [diff] [blame] | 1554 | * The following commands are currently not supported: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | * |
Borislav Petkov | d99c9da | 2008-02-02 19:56:51 +0100 | [diff] [blame] | 1556 | * MTFSS, MTBSS, MTWSM, MTSETDENSITY, MTSETDRVBUFFER, MT_ST_BOOLEANS, |
| 1557 | * MT_ST_WRITE_THRESHOLD. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | */ |
Borislav Petkov | d99c9da | 2008-02-02 19:56:51 +0100 | [diff] [blame] | 1559 | static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | { |
| 1561 | idetape_tape_t *tape = drive->driver_data; |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1562 | struct gendisk *disk = tape->disk; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1563 | struct ide_atapi_pc pc; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1564 | int i, retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1566 | debug_log(DBG_ERR, "Handling MTIOCTOP ioctl: mt_op=%d, mt_count=%d\n", |
| 1567 | mt_op, mt_count); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | switch (mt_op) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1570 | case MTFSF: |
| 1571 | case MTFSFM: |
| 1572 | case MTBSF: |
| 1573 | case MTBSFM: |
| 1574 | if (!mt_count) |
| 1575 | return 0; |
| 1576 | return idetape_space_over_filemarks(drive, mt_op, mt_count); |
| 1577 | default: |
| 1578 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | } |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | switch (mt_op) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1582 | case MTWEOF: |
| 1583 | if (tape->write_prot) |
| 1584 | return -EACCES; |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1585 | ide_tape_discard_merge_buffer(drive, 1); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1586 | for (i = 0; i < mt_count; i++) { |
| 1587 | retval = idetape_write_filemark(drive); |
| 1588 | if (retval) |
| 1589 | return retval; |
| 1590 | } |
| 1591 | return 0; |
| 1592 | case MTREW: |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1593 | ide_tape_discard_merge_buffer(drive, 0); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1594 | if (idetape_rewind_tape(drive)) |
| 1595 | return -EIO; |
| 1596 | return 0; |
| 1597 | case MTLOAD: |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1598 | ide_tape_discard_merge_buffer(drive, 0); |
Bartlomiej Zolnierkiewicz | 0c8a6c7 | 2008-10-10 22:39:39 +0200 | [diff] [blame] | 1599 | return ide_do_start_stop(drive, disk, IDETAPE_LU_LOAD_MASK); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1600 | case MTUNLOAD: |
| 1601 | case MTOFFL: |
| 1602 | /* |
| 1603 | * If door is locked, attempt to unlock before |
| 1604 | * attempting to eject. |
| 1605 | */ |
| 1606 | if (tape->door_locked) { |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1607 | if (!ide_set_media_lock(drive, disk, 0)) |
Bartlomiej Zolnierkiewicz | 385a4b8 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 1608 | tape->door_locked = DOOR_UNLOCKED; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1609 | } |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1610 | ide_tape_discard_merge_buffer(drive, 0); |
Bartlomiej Zolnierkiewicz | 0c8a6c7 | 2008-10-10 22:39:39 +0200 | [diff] [blame] | 1611 | retval = ide_do_start_stop(drive, disk, !IDETAPE_LU_LOAD_MASK); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1612 | if (!retval) |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1613 | clear_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1614 | return retval; |
| 1615 | case MTNOP: |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1616 | ide_tape_discard_merge_buffer(drive, 0); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1617 | return idetape_flush_tape_buffers(drive); |
| 1618 | case MTRETEN: |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1619 | ide_tape_discard_merge_buffer(drive, 0); |
Bartlomiej Zolnierkiewicz | 0c8a6c7 | 2008-10-10 22:39:39 +0200 | [diff] [blame] | 1620 | return ide_do_start_stop(drive, disk, |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1621 | IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1622 | case MTEOM: |
| 1623 | idetape_create_space_cmd(&pc, 0, IDETAPE_SPACE_TO_EOD); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1624 | return ide_queue_pc_tail(drive, disk, &pc); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1625 | case MTERASE: |
| 1626 | (void)idetape_rewind_tape(drive); |
| 1627 | idetape_create_erase_cmd(&pc); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1628 | return ide_queue_pc_tail(drive, disk, &pc); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1629 | case MTSETBLK: |
| 1630 | if (mt_count) { |
| 1631 | if (mt_count < tape->blk_size || |
| 1632 | mt_count % tape->blk_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | return -EIO; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1634 | tape->user_bs_factor = mt_count / tape->blk_size; |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1635 | clear_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1636 | } else |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1637 | set_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1638 | return 0; |
| 1639 | case MTSEEK: |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1640 | ide_tape_discard_merge_buffer(drive, 0); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1641 | return idetape_position_tape(drive, |
| 1642 | mt_count * tape->user_bs_factor, tape->partition, 0); |
| 1643 | case MTSETPART: |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1644 | ide_tape_discard_merge_buffer(drive, 0); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1645 | return idetape_position_tape(drive, 0, mt_count, 0); |
| 1646 | case MTFSR: |
| 1647 | case MTBSR: |
| 1648 | case MTLOCK: |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1649 | retval = ide_set_media_lock(drive, disk, 1); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1650 | if (retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | return retval; |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1652 | tape->door_locked = DOOR_EXPLICITLY_LOCKED; |
| 1653 | return 0; |
| 1654 | case MTUNLOCK: |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1655 | retval = ide_set_media_lock(drive, disk, 0); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1656 | if (retval) |
| 1657 | return retval; |
| 1658 | tape->door_locked = DOOR_UNLOCKED; |
| 1659 | return 0; |
| 1660 | default: |
| 1661 | printk(KERN_ERR "ide-tape: MTIO operation %d not supported\n", |
| 1662 | mt_op); |
| 1663 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | } |
| 1665 | } |
| 1666 | |
| 1667 | /* |
Borislav Petkov | d99c9da | 2008-02-02 19:56:51 +0100 | [diff] [blame] | 1668 | * Our character device ioctls. General mtio.h magnetic io commands are |
| 1669 | * supported here, and not in the corresponding block interface. Our own |
| 1670 | * ide-tape ioctls are supported on both interfaces. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | */ |
Borislav Petkov | d99c9da | 2008-02-02 19:56:51 +0100 | [diff] [blame] | 1672 | static int idetape_chrdev_ioctl(struct inode *inode, struct file *file, |
| 1673 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | { |
Borislav Petkov | 5aeddf9 | 2008-10-13 21:39:34 +0200 | [diff] [blame] | 1675 | struct ide_tape_obj *tape = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | ide_drive_t *drive = tape->drive; |
| 1677 | struct mtop mtop; |
| 1678 | struct mtget mtget; |
| 1679 | struct mtpos mtpos; |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1680 | int block_offset = 0, position = tape->first_frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | void __user *argp = (void __user *)arg; |
| 1682 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1683 | debug_log(DBG_CHRDEV, "Enter %s, cmd=%u\n", __func__, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1685 | if (tape->chrdev_dir == IDETAPE_DIR_WRITE) { |
Borislav Petkov | d9df937 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1686 | ide_tape_flush_merge_buffer(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | idetape_flush_tape_buffers(drive); |
| 1688 | } |
| 1689 | if (cmd == MTIOCGET || cmd == MTIOCPOS) { |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1690 | block_offset = tape->merge_bh_size / |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1691 | (tape->blk_size * tape->user_bs_factor); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1692 | position = idetape_read_position(drive); |
| 1693 | if (position < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | return -EIO; |
| 1695 | } |
| 1696 | switch (cmd) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1697 | case MTIOCTOP: |
| 1698 | if (copy_from_user(&mtop, argp, sizeof(struct mtop))) |
| 1699 | return -EFAULT; |
| 1700 | return idetape_mtioctop(drive, mtop.mt_op, mtop.mt_count); |
| 1701 | case MTIOCGET: |
| 1702 | memset(&mtget, 0, sizeof(struct mtget)); |
| 1703 | mtget.mt_type = MT_ISSCSI2; |
| 1704 | mtget.mt_blkno = position / tape->user_bs_factor - block_offset; |
| 1705 | mtget.mt_dsreg = |
| 1706 | ((tape->blk_size * tape->user_bs_factor) |
| 1707 | << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK; |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1708 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1709 | if (tape->drv_write_prot) |
| 1710 | mtget.mt_gstat |= GMT_WR_PROT(0xffffffff); |
| 1711 | |
| 1712 | if (copy_to_user(argp, &mtget, sizeof(struct mtget))) |
| 1713 | return -EFAULT; |
| 1714 | return 0; |
| 1715 | case MTIOCPOS: |
| 1716 | mtpos.mt_blkno = position / tape->user_bs_factor - block_offset; |
| 1717 | if (copy_to_user(argp, &mtpos, sizeof(struct mtpos))) |
| 1718 | return -EFAULT; |
| 1719 | return 0; |
| 1720 | default: |
| 1721 | if (tape->chrdev_dir == IDETAPE_DIR_READ) |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1722 | ide_tape_discard_merge_buffer(drive, 1); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1723 | return idetape_blkdev_ioctl(drive, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | } |
| 1725 | } |
| 1726 | |
Borislav Petkov | 3cffb9c | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1727 | /* |
| 1728 | * Do a mode sense page 0 with block descriptor and if it succeeds set the tape |
| 1729 | * block size with the reported value. |
| 1730 | */ |
| 1731 | static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive) |
| 1732 | { |
| 1733 | idetape_tape_t *tape = drive->driver_data; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1734 | struct ide_atapi_pc pc; |
Borislav Petkov | 3cffb9c | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1735 | |
| 1736 | idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1737 | if (ide_queue_pc_tail(drive, tape->disk, &pc)) { |
Borislav Petkov | 3cffb9c | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1738 | printk(KERN_ERR "ide-tape: Can't get block descriptor\n"); |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1739 | if (tape->blk_size == 0) { |
Borislav Petkov | 3cffb9c | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1740 | printk(KERN_WARNING "ide-tape: Cannot deal with zero " |
| 1741 | "block size, assuming 32k\n"); |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1742 | tape->blk_size = 32768; |
Borislav Petkov | 3cffb9c | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1743 | } |
| 1744 | return; |
| 1745 | } |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1746 | tape->blk_size = (pc.buf[4 + 5] << 16) + |
| 1747 | (pc.buf[4 + 6] << 8) + |
| 1748 | pc.buf[4 + 7]; |
| 1749 | tape->drv_write_prot = (pc.buf[2] & 0x80) >> 7; |
Borislav Petkov | 3cffb9c | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1750 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1752 | static int idetape_chrdev_open(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | { |
| 1754 | unsigned int minor = iminor(inode), i = minor & ~0xc0; |
| 1755 | ide_drive_t *drive; |
| 1756 | idetape_tape_t *tape; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | int retval; |
| 1758 | |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1759 | if (i >= MAX_HWIFS * MAX_DRIVES) |
| 1760 | return -ENXIO; |
| 1761 | |
Jonathan Corbet | 04f4ac9 | 2008-05-15 12:01:56 -0600 | [diff] [blame] | 1762 | lock_kernel(); |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1763 | tape = ide_tape_chrdev_get(i); |
Jonathan Corbet | 04f4ac9 | 2008-05-15 12:01:56 -0600 | [diff] [blame] | 1764 | if (!tape) { |
| 1765 | unlock_kernel(); |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1766 | return -ENXIO; |
Jonathan Corbet | 04f4ac9 | 2008-05-15 12:01:56 -0600 | [diff] [blame] | 1767 | } |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1768 | |
| 1769 | debug_log(DBG_CHRDEV, "Enter %s\n", __func__); |
| 1770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | /* |
| 1772 | * We really want to do nonseekable_open(inode, filp); here, but some |
| 1773 | * versions of tar incorrectly call lseek on tapes and bail out if that |
| 1774 | * fails. So we disallow pread() and pwrite(), but permit lseeks. |
| 1775 | */ |
| 1776 | filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE); |
| 1777 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | drive = tape->drive; |
| 1779 | |
| 1780 | filp->private_data = tape; |
| 1781 | |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1782 | if (test_and_set_bit(IDE_AFLAG_BUSY, &drive->atapi_flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | retval = -EBUSY; |
| 1784 | goto out_put_tape; |
| 1785 | } |
| 1786 | |
| 1787 | retval = idetape_wait_ready(drive, 60 * HZ); |
| 1788 | if (retval) { |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1789 | clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | printk(KERN_ERR "ide-tape: %s: drive not ready\n", tape->name); |
| 1791 | goto out_put_tape; |
| 1792 | } |
| 1793 | |
| 1794 | idetape_read_position(drive); |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1795 | if (!test_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | (void)idetape_rewind_tape(drive); |
| 1797 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | /* Read block size and write protect status from drive. */ |
Borislav Petkov | 3cffb9c | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 1799 | ide_tape_get_bsize_from_bdesc(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | |
| 1801 | /* Set write protect flag if device is opened as read-only. */ |
| 1802 | if ((filp->f_flags & O_ACCMODE) == O_RDONLY) |
| 1803 | tape->write_prot = 1; |
| 1804 | else |
| 1805 | tape->write_prot = tape->drv_write_prot; |
| 1806 | |
| 1807 | /* Make sure drive isn't write protected if user wants to write. */ |
| 1808 | if (tape->write_prot) { |
| 1809 | if ((filp->f_flags & O_ACCMODE) == O_WRONLY || |
| 1810 | (filp->f_flags & O_ACCMODE) == O_RDWR) { |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1811 | clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | retval = -EROFS; |
| 1813 | goto out_put_tape; |
| 1814 | } |
| 1815 | } |
| 1816 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 1817 | /* Lock the tape drive door so user can't eject. */ |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1818 | if (tape->chrdev_dir == IDETAPE_DIR_NONE) { |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1819 | if (!ide_set_media_lock(drive, tape->disk, 1)) { |
Bartlomiej Zolnierkiewicz | 385a4b8 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 1820 | if (tape->door_locked != DOOR_EXPLICITLY_LOCKED) |
| 1821 | tape->door_locked = DOOR_LOCKED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | } |
| 1823 | } |
Jonathan Corbet | 04f4ac9 | 2008-05-15 12:01:56 -0600 | [diff] [blame] | 1824 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | return 0; |
| 1826 | |
| 1827 | out_put_tape: |
| 1828 | ide_tape_put(tape); |
Jonathan Corbet | 04f4ac9 | 2008-05-15 12:01:56 -0600 | [diff] [blame] | 1829 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | return retval; |
| 1831 | } |
| 1832 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1833 | static void idetape_write_release(ide_drive_t *drive, unsigned int minor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | { |
| 1835 | idetape_tape_t *tape = drive->driver_data; |
| 1836 | |
Borislav Petkov | d9df937 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1837 | ide_tape_flush_merge_buffer(drive); |
Tejun Heo | 35ab8d3 | 2009-04-19 08:46:02 +0900 | [diff] [blame^] | 1838 | tape->merge_bh = ide_tape_kmalloc_buffer(tape, 1); |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1839 | if (tape->merge_bh != NULL) { |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1840 | idetape_pad_zeros(drive, tape->blk_size * |
| 1841 | (tape->user_bs_factor - 1)); |
Borislav Petkov | 077e3bd | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1842 | ide_tape_kfree_buffer(tape); |
| 1843 | tape->merge_bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | } |
| 1845 | idetape_write_filemark(drive); |
| 1846 | idetape_flush_tape_buffers(drive); |
| 1847 | idetape_flush_tape_buffers(drive); |
| 1848 | } |
| 1849 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1850 | static int idetape_chrdev_release(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | { |
Borislav Petkov | 5aeddf9 | 2008-10-13 21:39:34 +0200 | [diff] [blame] | 1852 | struct ide_tape_obj *tape = filp->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | ide_drive_t *drive = tape->drive; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | unsigned int minor = iminor(inode); |
| 1855 | |
| 1856 | lock_kernel(); |
| 1857 | tape = drive->driver_data; |
Borislav Petkov | 8004a8c | 2008-02-06 02:57:51 +0100 | [diff] [blame] | 1858 | |
| 1859 | debug_log(DBG_CHRDEV, "Enter %s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1861 | if (tape->chrdev_dir == IDETAPE_DIR_WRITE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | idetape_write_release(drive, minor); |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1863 | if (tape->chrdev_dir == IDETAPE_DIR_READ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | if (minor < 128) |
Borislav Petkov | ec0fdb0 | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 1865 | ide_tape_discard_merge_buffer(drive, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | } |
Borislav Petkov | f64eee7 | 2008-04-27 15:38:25 +0200 | [diff] [blame] | 1867 | |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1868 | if (minor < 128 && test_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | (void) idetape_rewind_tape(drive); |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1870 | if (tape->chrdev_dir == IDETAPE_DIR_NONE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | if (tape->door_locked == DOOR_LOCKED) { |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1872 | if (!ide_set_media_lock(drive, tape->disk, 0)) |
Bartlomiej Zolnierkiewicz | 385a4b8 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 1873 | tape->door_locked = DOOR_UNLOCKED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | } |
| 1875 | } |
Borislav Petkov | f2e3ab5 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 1876 | clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | ide_tape_put(tape); |
| 1878 | unlock_kernel(); |
| 1879 | return 0; |
| 1880 | } |
| 1881 | |
Borislav Petkov | 6d29c8f | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1882 | static void idetape_get_inquiry_results(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | idetape_tape_t *tape = drive->driver_data; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1885 | struct ide_atapi_pc pc; |
Bartlomiej Zolnierkiewicz | 41fa9f8 | 2009-03-31 20:15:25 +0200 | [diff] [blame] | 1886 | u8 pc_buf[256]; |
Borislav Petkov | 801bd32 | 2008-09-27 19:32:17 +0200 | [diff] [blame] | 1887 | char fw_rev[4], vendor_id[8], product_id[16]; |
Borislav Petkov | 6d29c8f | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1888 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | idetape_create_inquiry_cmd(&pc); |
Bartlomiej Zolnierkiewicz | 41fa9f8 | 2009-03-31 20:15:25 +0200 | [diff] [blame] | 1890 | pc.buf = &pc_buf[0]; |
| 1891 | pc.buf_size = sizeof(pc_buf); |
| 1892 | |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1893 | if (ide_queue_pc_tail(drive, tape->disk, &pc)) { |
Borislav Petkov | 6d29c8f | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1894 | printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n", |
| 1895 | tape->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | return; |
| 1897 | } |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1898 | memcpy(vendor_id, &pc.buf[8], 8); |
| 1899 | memcpy(product_id, &pc.buf[16], 16); |
| 1900 | memcpy(fw_rev, &pc.buf[32], 4); |
Borislav Petkov | 6d29c8f | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1901 | |
Borislav Petkov | 801bd32 | 2008-09-27 19:32:17 +0200 | [diff] [blame] | 1902 | ide_fixstring(vendor_id, 8, 0); |
| 1903 | ide_fixstring(product_id, 16, 0); |
| 1904 | ide_fixstring(fw_rev, 4, 0); |
Borislav Petkov | 41f81d54 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1905 | |
Borislav Petkov | 801bd32 | 2008-09-27 19:32:17 +0200 | [diff] [blame] | 1906 | printk(KERN_INFO "ide-tape: %s <-> %s: %.8s %.16s rev %.4s\n", |
Borislav Petkov | 41f81d54 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1907 | drive->name, tape->name, vendor_id, product_id, fw_rev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | } |
| 1909 | |
| 1910 | /* |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1911 | * Ask the tape about its various parameters. In particular, we will adjust our |
| 1912 | * data transfer buffer size to the recommended value as returned by the tape. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 1914 | static void idetape_get_mode_sense_results(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | { |
| 1916 | idetape_tape_t *tape = drive->driver_data; |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1917 | struct ide_atapi_pc pc; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1918 | u8 *caps; |
| 1919 | u8 speed, max_speed; |
Borislav Petkov | 47314fa | 2008-02-02 19:56:48 +0100 | [diff] [blame] | 1920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | idetape_create_mode_sense_cmd(&pc, IDETAPE_CAPABILITIES_PAGE); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1922 | if (ide_queue_pc_tail(drive, tape->disk, &pc)) { |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1923 | printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming" |
| 1924 | " some default values\n"); |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1925 | tape->blk_size = 512; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1926 | put_unaligned(52, (u16 *)&tape->caps[12]); |
| 1927 | put_unaligned(540, (u16 *)&tape->caps[14]); |
| 1928 | put_unaligned(6*52, (u16 *)&tape->caps[16]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | return; |
| 1930 | } |
Borislav Petkov | d236d74 | 2008-04-18 00:46:27 +0200 | [diff] [blame] | 1931 | caps = pc.buf + 4 + pc.buf[3]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1933 | /* convert to host order and save for later use */ |
Harvey Harrison | cd740ab | 2008-07-24 22:53:33 +0200 | [diff] [blame] | 1934 | speed = be16_to_cpup((__be16 *)&caps[14]); |
| 1935 | max_speed = be16_to_cpup((__be16 *)&caps[8]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | |
Harvey Harrison | cd740ab | 2008-07-24 22:53:33 +0200 | [diff] [blame] | 1937 | *(u16 *)&caps[8] = max_speed; |
| 1938 | *(u16 *)&caps[12] = be16_to_cpup((__be16 *)&caps[12]); |
| 1939 | *(u16 *)&caps[14] = speed; |
| 1940 | *(u16 *)&caps[16] = be16_to_cpup((__be16 *)&caps[16]); |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1941 | |
| 1942 | if (!speed) { |
| 1943 | printk(KERN_INFO "ide-tape: %s: invalid tape speed " |
| 1944 | "(assuming 650KB/sec)\n", drive->name); |
Harvey Harrison | cd740ab | 2008-07-24 22:53:33 +0200 | [diff] [blame] | 1945 | *(u16 *)&caps[14] = 650; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | } |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1947 | if (!max_speed) { |
| 1948 | printk(KERN_INFO "ide-tape: %s: invalid max_speed " |
| 1949 | "(assuming 650KB/sec)\n", drive->name); |
Harvey Harrison | cd740ab | 2008-07-24 22:53:33 +0200 | [diff] [blame] | 1950 | *(u16 *)&caps[8] = 650; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | } |
| 1952 | |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1953 | memcpy(&tape->caps, caps, 20); |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1954 | |
| 1955 | /* device lacks locking support according to capabilities page */ |
| 1956 | if ((caps[6] & 1) == 0) |
Bartlomiej Zolnierkiewicz | 42619d3 | 2008-10-17 18:09:11 +0200 | [diff] [blame] | 1957 | drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 1958 | |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1959 | if (caps[7] & 0x02) |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1960 | tape->blk_size = 512; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 1961 | else if (caps[7] & 0x04) |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 1962 | tape->blk_size = 1024; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | } |
| 1964 | |
Bartlomiej Zolnierkiewicz | 7662d04 | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 1965 | #ifdef CONFIG_IDE_PROC_FS |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 1966 | #define ide_tape_devset_get(name, field) \ |
| 1967 | static int get_##name(ide_drive_t *drive) \ |
| 1968 | { \ |
| 1969 | idetape_tape_t *tape = drive->driver_data; \ |
| 1970 | return tape->field; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | } |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 1972 | |
| 1973 | #define ide_tape_devset_set(name, field) \ |
| 1974 | static int set_##name(ide_drive_t *drive, int arg) \ |
| 1975 | { \ |
| 1976 | idetape_tape_t *tape = drive->driver_data; \ |
| 1977 | tape->field = arg; \ |
| 1978 | return 0; \ |
| 1979 | } |
| 1980 | |
Elias Oltmanns | 92f1f8f | 2008-10-10 22:39:40 +0200 | [diff] [blame] | 1981 | #define ide_tape_devset_rw_field(_name, _field) \ |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 1982 | ide_tape_devset_get(_name, _field) \ |
| 1983 | ide_tape_devset_set(_name, _field) \ |
Elias Oltmanns | 92f1f8f | 2008-10-10 22:39:40 +0200 | [diff] [blame] | 1984 | IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name) |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 1985 | |
Elias Oltmanns | 92f1f8f | 2008-10-10 22:39:40 +0200 | [diff] [blame] | 1986 | #define ide_tape_devset_r_field(_name, _field) \ |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 1987 | ide_tape_devset_get(_name, _field) \ |
Elias Oltmanns | 92f1f8f | 2008-10-10 22:39:40 +0200 | [diff] [blame] | 1988 | IDE_DEVSET(_name, 0, get_##_name, NULL) |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 1989 | |
| 1990 | static int mulf_tdsc(ide_drive_t *drive) { return 1000; } |
| 1991 | static int divf_tdsc(ide_drive_t *drive) { return HZ; } |
| 1992 | static int divf_buffer(ide_drive_t *drive) { return 2; } |
| 1993 | static int divf_buffer_size(ide_drive_t *drive) { return 1024; } |
| 1994 | |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 1995 | ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP); |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 1996 | |
Elias Oltmanns | 92f1f8f | 2008-10-10 22:39:40 +0200 | [diff] [blame] | 1997 | ide_tape_devset_rw_field(debug_mask, debug_mask); |
| 1998 | ide_tape_devset_rw_field(tdsc, best_dsc_rw_freq); |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 1999 | |
Elias Oltmanns | 92f1f8f | 2008-10-10 22:39:40 +0200 | [diff] [blame] | 2000 | ide_tape_devset_r_field(avg_speed, avg_speed); |
| 2001 | ide_tape_devset_r_field(speed, caps[14]); |
| 2002 | ide_tape_devset_r_field(buffer, caps[16]); |
| 2003 | ide_tape_devset_r_field(buffer_size, buffer_size); |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 2004 | |
Elias Oltmanns | 92f1f8f | 2008-10-10 22:39:40 +0200 | [diff] [blame] | 2005 | static const struct ide_proc_devset idetape_settings[] = { |
| 2006 | __IDE_PROC_DEVSET(avg_speed, 0, 0xffff, NULL, NULL), |
| 2007 | __IDE_PROC_DEVSET(buffer, 0, 0xffff, NULL, divf_buffer), |
| 2008 | __IDE_PROC_DEVSET(buffer_size, 0, 0xffff, NULL, divf_buffer_size), |
| 2009 | __IDE_PROC_DEVSET(debug_mask, 0, 0xffff, NULL, NULL), |
| 2010 | __IDE_PROC_DEVSET(dsc_overlap, 0, 1, NULL, NULL), |
| 2011 | __IDE_PROC_DEVSET(speed, 0, 0xffff, NULL, NULL), |
| 2012 | __IDE_PROC_DEVSET(tdsc, IDETAPE_DSC_RW_MIN, IDETAPE_DSC_RW_MAX, |
| 2013 | mulf_tdsc, divf_tdsc), |
Hannes Eder | 71bfc7a | 2009-03-05 16:10:56 +0100 | [diff] [blame] | 2014 | { NULL }, |
Bartlomiej Zolnierkiewicz | 8185d5a | 2008-10-10 22:39:28 +0200 | [diff] [blame] | 2015 | }; |
Bartlomiej Zolnierkiewicz | 7662d04 | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 2016 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | |
| 2018 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 2019 | * The function below is called to: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 2021 | * 1. Initialize our various state variables. |
| 2022 | * 2. Ask the tape for its capabilities. |
| 2023 | * 3. Allocate a buffer which will be used for data transfer. The buffer size |
| 2024 | * is chosen based on the recommendation which we received in step 2. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | * |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 2026 | * Note that at this point ide.c already assigned us an irq, so that we can |
| 2027 | * queue requests here and wait for their completion. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | */ |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 2029 | static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | { |
Borislav Petkov | 83042b2 | 2008-04-27 15:38:27 +0200 | [diff] [blame] | 2031 | unsigned long t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | int speed; |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 2033 | int buffer_size; |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 2034 | u16 *ctl = (u16 *)&tape->caps[12]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2035 | |
Bartlomiej Zolnierkiewicz | 85e3903 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 2036 | drive->pc_callback = ide_tape_callback; |
| 2037 | drive->pc_update_buffers = idetape_update_buffers; |
| 2038 | drive->pc_io_buffers = ide_tape_io_buffers; |
Borislav Petkov | 776bb02 | 2008-07-23 19:55:59 +0200 | [diff] [blame] | 2039 | |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 2040 | drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP; |
| 2041 | |
Bartlomiej Zolnierkiewicz | 4166c19 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 2042 | if (drive->hwif->host_flags & IDE_HFLAG_NO_DSC) { |
| 2043 | printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n", |
| 2044 | tape->name); |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 2045 | drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | } |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 2047 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | /* Seagate Travan drives do not support DSC overlap. */ |
Bartlomiej Zolnierkiewicz | 4dde449 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 2049 | if (strstr((char *)&drive->id[ATA_ID_PROD], "Seagate STT3401")) |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 2050 | drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; |
| 2051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | tape->minor = minor; |
| 2053 | tape->name[0] = 'h'; |
| 2054 | tape->name[1] = 't'; |
| 2055 | tape->name[2] = '0' + minor; |
Borislav Petkov | 54abf37 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 2056 | tape->chrdev_dir = IDETAPE_DIR_NONE; |
Bartlomiej Zolnierkiewicz | 4dde449 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 2057 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | idetape_get_inquiry_results(drive); |
| 2059 | idetape_get_mode_sense_results(drive); |
Borislav Petkov | 3cffb9c | 2008-02-02 19:56:50 +0100 | [diff] [blame] | 2060 | ide_tape_get_bsize_from_bdesc(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | tape->user_bs_factor = 1; |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 2062 | tape->buffer_size = *ctl * tape->blk_size; |
| 2063 | while (tape->buffer_size > 0xffff) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | printk(KERN_NOTICE "ide-tape: decreasing stage size\n"); |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 2065 | *ctl /= 2; |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 2066 | tape->buffer_size = *ctl * tape->blk_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | } |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 2068 | buffer_size = tape->buffer_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | |
Borislav Petkov | 83042b2 | 2008-04-27 15:38:27 +0200 | [diff] [blame] | 2070 | /* select the "best" DSC read/write polling freq */ |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 2071 | speed = max(*(u16 *)&tape->caps[14], *(u16 *)&tape->caps[8]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 2073 | t = (IDETAPE_FIFO_THRESHOLD * tape->buffer_size * HZ) / (speed * 1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | |
| 2075 | /* |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 2076 | * Ensure that the number we got makes sense; limit it within |
| 2077 | * IDETAPE_DSC_RW_MIN and IDETAPE_DSC_RW_MAX. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | */ |
Harvey Harrison | a792bd5 | 2008-07-15 21:21:41 +0200 | [diff] [blame] | 2079 | tape->best_dsc_rw_freq = clamp_t(unsigned long, t, IDETAPE_DSC_RW_MIN, |
| 2080 | IDETAPE_DSC_RW_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | printk(KERN_INFO "ide-tape: %s <-> %s: %dKBps, %d*%dkB buffer, " |
Borislav Petkov | 83042b2 | 2008-04-27 15:38:27 +0200 | [diff] [blame] | 2082 | "%lums tDSC%s\n", |
Borislav Petkov | b642201 | 2008-02-02 19:56:49 +0100 | [diff] [blame] | 2083 | drive->name, tape->name, *(u16 *)&tape->caps[14], |
Borislav Petkov | f73850a | 2008-04-27 15:38:33 +0200 | [diff] [blame] | 2084 | (*(u16 *)&tape->caps[16] * 512) / tape->buffer_size, |
| 2085 | tape->buffer_size / 1024, |
Borislav Petkov | 54bb207 | 2008-02-06 02:57:52 +0100 | [diff] [blame] | 2086 | tape->best_dsc_rw_freq * 1000 / HZ, |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 2087 | (drive->dev_flags & IDE_DFLAG_USING_DMA) ? ", DMA" : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | |
Bartlomiej Zolnierkiewicz | 1e874f4 | 2008-10-10 22:39:27 +0200 | [diff] [blame] | 2089 | ide_proc_register_driver(drive, tape->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | } |
| 2091 | |
Russell King | 4031bbe | 2006-01-06 11:41:00 +0000 | [diff] [blame] | 2092 | static void ide_tape_remove(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | { |
| 2094 | idetape_tape_t *tape = drive->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | |
Bartlomiej Zolnierkiewicz | 7662d04 | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 2096 | ide_proc_unregister_driver(drive, tape->driver); |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 2097 | device_del(&tape->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | ide_unregister_region(tape->disk); |
| 2099 | |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 2100 | mutex_lock(&idetape_ref_mutex); |
| 2101 | put_device(&tape->dev); |
| 2102 | mutex_unlock(&idetape_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | } |
| 2104 | |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 2105 | static void ide_tape_release(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | { |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 2107 | struct ide_tape_obj *tape = to_ide_drv(dev, ide_tape_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | ide_drive_t *drive = tape->drive; |
| 2109 | struct gendisk *g = tape->disk; |
| 2110 | |
Borislav Petkov | 01a63aeb | 2008-04-27 15:38:34 +0200 | [diff] [blame] | 2111 | BUG_ON(tape->merge_bh_size); |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 2112 | |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 2113 | drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | drive->driver_data = NULL; |
Tony Jones | dbc1272 | 2007-09-25 02:03:03 +0200 | [diff] [blame] | 2115 | device_destroy(idetape_sysfs_class, MKDEV(IDETAPE_MAJOR, tape->minor)); |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 2116 | device_destroy(idetape_sysfs_class, |
| 2117 | MKDEV(IDETAPE_MAJOR, tape->minor + 128)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | idetape_devs[tape->minor] = NULL; |
| 2119 | g->private_data = NULL; |
| 2120 | put_disk(g); |
| 2121 | kfree(tape); |
| 2122 | } |
| 2123 | |
Bartlomiej Zolnierkiewicz | ecfd80e | 2007-05-10 00:01:09 +0200 | [diff] [blame] | 2124 | #ifdef CONFIG_IDE_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | static int proc_idetape_read_name |
| 2126 | (char *page, char **start, off_t off, int count, int *eof, void *data) |
| 2127 | { |
| 2128 | ide_drive_t *drive = (ide_drive_t *) data; |
| 2129 | idetape_tape_t *tape = drive->driver_data; |
| 2130 | char *out = page; |
| 2131 | int len; |
| 2132 | |
| 2133 | len = sprintf(out, "%s\n", tape->name); |
| 2134 | PROC_IDE_READ_RETURN(page, start, off, count, eof, len); |
| 2135 | } |
| 2136 | |
| 2137 | static ide_proc_entry_t idetape_proc[] = { |
| 2138 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, |
| 2139 | { "name", S_IFREG|S_IRUGO, proc_idetape_read_name, NULL }, |
| 2140 | { NULL, 0, NULL, NULL } |
| 2141 | }; |
Bartlomiej Zolnierkiewicz | 79cb380 | 2008-10-17 18:09:13 +0200 | [diff] [blame] | 2142 | |
| 2143 | static ide_proc_entry_t *ide_tape_proc_entries(ide_drive_t *drive) |
| 2144 | { |
| 2145 | return idetape_proc; |
| 2146 | } |
| 2147 | |
| 2148 | static const struct ide_proc_devset *ide_tape_proc_devsets(ide_drive_t *drive) |
| 2149 | { |
| 2150 | return idetape_settings; |
| 2151 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2152 | #endif |
| 2153 | |
Russell King | 4031bbe | 2006-01-06 11:41:00 +0000 | [diff] [blame] | 2154 | static int ide_tape_probe(ide_drive_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | |
Bartlomiej Zolnierkiewicz | 7f3c868 | 2009-01-06 17:20:53 +0100 | [diff] [blame] | 2156 | static struct ide_driver idetape_driver = { |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 2157 | .gen_driver = { |
Laurent Riffard | 4ef3b8f | 2005-11-18 22:15:40 +0100 | [diff] [blame] | 2158 | .owner = THIS_MODULE, |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 2159 | .name = "ide-tape", |
| 2160 | .bus = &ide_bus_type, |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 2161 | }, |
Russell King | 4031bbe | 2006-01-06 11:41:00 +0000 | [diff] [blame] | 2162 | .probe = ide_tape_probe, |
| 2163 | .remove = ide_tape_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | .version = IDETAPE_VERSION, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | .do_request = idetape_do_request, |
Bartlomiej Zolnierkiewicz | 7662d04 | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 2166 | #ifdef CONFIG_IDE_PROC_FS |
Bartlomiej Zolnierkiewicz | 79cb380 | 2008-10-17 18:09:13 +0200 | [diff] [blame] | 2167 | .proc_entries = ide_tape_proc_entries, |
| 2168 | .proc_devsets = ide_tape_proc_devsets, |
Bartlomiej Zolnierkiewicz | 7662d04 | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 2169 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | }; |
| 2171 | |
Borislav Petkov | 3c98bf3 | 2008-02-06 02:57:53 +0100 | [diff] [blame] | 2172 | /* Our character device supporting functions, passed to register_chrdev. */ |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 2173 | static const struct file_operations idetape_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | .owner = THIS_MODULE, |
| 2175 | .read = idetape_chrdev_read, |
| 2176 | .write = idetape_chrdev_write, |
| 2177 | .ioctl = idetape_chrdev_ioctl, |
| 2178 | .open = idetape_chrdev_open, |
| 2179 | .release = idetape_chrdev_release, |
| 2180 | }; |
| 2181 | |
Al Viro | a4600f8 | 2008-03-02 10:27:58 -0500 | [diff] [blame] | 2182 | static int idetape_open(struct block_device *bdev, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | { |
Al Viro | a4600f8 | 2008-03-02 10:27:58 -0500 | [diff] [blame] | 2184 | struct ide_tape_obj *tape = ide_tape_get(bdev->bd_disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 2186 | if (!tape) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | return -ENXIO; |
| 2188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | return 0; |
| 2190 | } |
| 2191 | |
Al Viro | a4600f8 | 2008-03-02 10:27:58 -0500 | [diff] [blame] | 2192 | static int idetape_release(struct gendisk *disk, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | { |
Borislav Petkov | 5aeddf9 | 2008-10-13 21:39:34 +0200 | [diff] [blame] | 2194 | struct ide_tape_obj *tape = ide_drv_g(disk, ide_tape_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | |
| 2196 | ide_tape_put(tape); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | return 0; |
| 2198 | } |
| 2199 | |
Al Viro | a4600f8 | 2008-03-02 10:27:58 -0500 | [diff] [blame] | 2200 | static int idetape_ioctl(struct block_device *bdev, fmode_t mode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | unsigned int cmd, unsigned long arg) |
| 2202 | { |
Borislav Petkov | 5aeddf9 | 2008-10-13 21:39:34 +0200 | [diff] [blame] | 2203 | struct ide_tape_obj *tape = ide_drv_g(bdev->bd_disk, ide_tape_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2204 | ide_drive_t *drive = tape->drive; |
Al Viro | 1bddd9e | 2008-09-02 17:19:43 -0400 | [diff] [blame] | 2205 | int err = generic_ide_ioctl(drive, bdev, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | if (err == -EINVAL) |
| 2207 | err = idetape_blkdev_ioctl(drive, cmd, arg); |
| 2208 | return err; |
| 2209 | } |
| 2210 | |
| 2211 | static struct block_device_operations idetape_block_ops = { |
| 2212 | .owner = THIS_MODULE, |
Al Viro | a4600f8 | 2008-03-02 10:27:58 -0500 | [diff] [blame] | 2213 | .open = idetape_open, |
| 2214 | .release = idetape_release, |
| 2215 | .locked_ioctl = idetape_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | }; |
| 2217 | |
Russell King | 4031bbe | 2006-01-06 11:41:00 +0000 | [diff] [blame] | 2218 | static int ide_tape_probe(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | { |
| 2220 | idetape_tape_t *tape; |
| 2221 | struct gendisk *g; |
| 2222 | int minor; |
| 2223 | |
| 2224 | if (!strstr("ide-tape", drive->driver_req)) |
| 2225 | goto failed; |
Bartlomiej Zolnierkiewicz | 2a92466 | 2008-10-10 22:39:24 +0200 | [diff] [blame] | 2226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | if (drive->media != ide_tape) |
| 2228 | goto failed; |
Bartlomiej Zolnierkiewicz | 2a92466 | 2008-10-10 22:39:24 +0200 | [diff] [blame] | 2229 | |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame] | 2230 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) && |
| 2231 | ide_check_atapi_device(drive, DRV_NAME) == 0) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 2232 | printk(KERN_ERR "ide-tape: %s: not supported by this version of" |
| 2233 | " the driver\n", drive->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | goto failed; |
| 2235 | } |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 2236 | tape = kzalloc(sizeof(idetape_tape_t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | if (tape == NULL) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 2238 | printk(KERN_ERR "ide-tape: %s: Can't allocate a tape struct\n", |
| 2239 | drive->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | goto failed; |
| 2241 | } |
| 2242 | |
| 2243 | g = alloc_disk(1 << PARTN_BITS); |
| 2244 | if (!g) |
| 2245 | goto out_free_tape; |
| 2246 | |
| 2247 | ide_init_disk(g, drive); |
| 2248 | |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 2249 | tape->dev.parent = &drive->gendev; |
| 2250 | tape->dev.release = ide_tape_release; |
| 2251 | dev_set_name(&tape->dev, dev_name(&drive->gendev)); |
| 2252 | |
| 2253 | if (device_register(&tape->dev)) |
| 2254 | goto out_free_disk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2255 | |
| 2256 | tape->drive = drive; |
| 2257 | tape->driver = &idetape_driver; |
| 2258 | tape->disk = g; |
| 2259 | |
| 2260 | g->private_data = &tape->driver; |
| 2261 | |
| 2262 | drive->driver_data = tape; |
| 2263 | |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 2264 | mutex_lock(&idetape_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | for (minor = 0; idetape_devs[minor]; minor++) |
| 2266 | ; |
| 2267 | idetape_devs[minor] = tape; |
Arjan van de Ven | cf8b897 | 2006-03-23 03:00:45 -0800 | [diff] [blame] | 2268 | mutex_unlock(&idetape_ref_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | |
| 2270 | idetape_setup(drive, tape, minor); |
| 2271 | |
Greg Kroah-Hartman | 3ee074b | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 2272 | device_create(idetape_sysfs_class, &drive->gendev, |
| 2273 | MKDEV(IDETAPE_MAJOR, minor), NULL, "%s", tape->name); |
| 2274 | device_create(idetape_sysfs_class, &drive->gendev, |
| 2275 | MKDEV(IDETAPE_MAJOR, minor + 128), NULL, |
| 2276 | "n%s", tape->name); |
Will Dyson | d5dee80 | 2005-09-16 02:55:07 -0700 | [diff] [blame] | 2277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | g->fops = &idetape_block_ops; |
| 2279 | ide_register_region(g); |
| 2280 | |
| 2281 | return 0; |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 2282 | |
Bartlomiej Zolnierkiewicz | 8fed436 | 2009-02-25 20:28:24 +0100 | [diff] [blame] | 2283 | out_free_disk: |
| 2284 | put_disk(g); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | out_free_tape: |
| 2286 | kfree(tape); |
| 2287 | failed: |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 2288 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | } |
| 2290 | |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 2291 | static void __exit idetape_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | { |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 2293 | driver_unregister(&idetape_driver.gen_driver); |
Will Dyson | d5dee80 | 2005-09-16 02:55:07 -0700 | [diff] [blame] | 2294 | class_destroy(idetape_sysfs_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | unregister_chrdev(IDETAPE_MAJOR, "ht"); |
| 2296 | } |
| 2297 | |
Bartlomiej Zolnierkiewicz | 17514e8 | 2005-11-19 22:24:35 +0100 | [diff] [blame] | 2298 | static int __init idetape_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | { |
Will Dyson | d5dee80 | 2005-09-16 02:55:07 -0700 | [diff] [blame] | 2300 | int error = 1; |
| 2301 | idetape_sysfs_class = class_create(THIS_MODULE, "ide_tape"); |
| 2302 | if (IS_ERR(idetape_sysfs_class)) { |
| 2303 | idetape_sysfs_class = NULL; |
| 2304 | printk(KERN_ERR "Unable to create sysfs class for ide tapes\n"); |
| 2305 | error = -EBUSY; |
| 2306 | goto out; |
| 2307 | } |
| 2308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | if (register_chrdev(IDETAPE_MAJOR, "ht", &idetape_fops)) { |
Borislav Petkov | 5a04cfa | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 2310 | printk(KERN_ERR "ide-tape: Failed to register chrdev" |
| 2311 | " interface\n"); |
Will Dyson | d5dee80 | 2005-09-16 02:55:07 -0700 | [diff] [blame] | 2312 | error = -EBUSY; |
| 2313 | goto out_free_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | } |
Will Dyson | d5dee80 | 2005-09-16 02:55:07 -0700 | [diff] [blame] | 2315 | |
| 2316 | error = driver_register(&idetape_driver.gen_driver); |
| 2317 | if (error) |
| 2318 | goto out_free_driver; |
| 2319 | |
| 2320 | return 0; |
| 2321 | |
| 2322 | out_free_driver: |
| 2323 | driver_unregister(&idetape_driver.gen_driver); |
| 2324 | out_free_class: |
| 2325 | class_destroy(idetape_sysfs_class); |
| 2326 | out: |
| 2327 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2328 | } |
| 2329 | |
Kay Sievers | 263756e | 2005-12-12 18:03:44 +0100 | [diff] [blame] | 2330 | MODULE_ALIAS("ide:*m-tape*"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | module_init(idetape_init); |
| 2332 | module_exit(idetape_exit); |
| 2333 | MODULE_ALIAS_CHARDEV_MAJOR(IDETAPE_MAJOR); |
Borislav Petkov | 9c14576 | 2008-02-06 02:57:54 +0100 | [diff] [blame] | 2334 | MODULE_DESCRIPTION("ATAPI Streaming TAPE Driver"); |
| 2335 | MODULE_LICENSE("GPL"); |