Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1 | /* |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2 | * f_mass_storage.c -- Mass Storage USB Composite Function |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2003-2008 Alan Stern |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 5 | * Copyright (C) 2009 Samsung Electronics |
Michal Nazarewicz | 54b8360 | 2012-01-13 15:05:16 +0100 | [diff] [blame] | 6 | * Author: Michal Nazarewicz <mina86@mina86.com> |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 7 | * All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions, and the following disclaimer, |
| 14 | * without modification. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. The names of the above-listed copyright holders may not be used |
| 19 | * to endorse or promote products derived from this software without |
| 20 | * specific prior written permission. |
| 21 | * |
| 22 | * ALTERNATIVELY, this software may be distributed under the terms of the |
| 23 | * GNU General Public License ("GPL") as published by the Free Software |
| 24 | * Foundation, either version 2 of that License or (at your option) any |
| 25 | * later version. |
| 26 | * |
| 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 28 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 29 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 30 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 31 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 32 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 33 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 34 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 35 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 36 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 37 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 38 | */ |
| 39 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 40 | /* |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 41 | * The Mass Storage Function acts as a USB Mass Storage device, |
| 42 | * appearing to the host as a disk drive or as a CD-ROM drive. In |
| 43 | * addition to providing an example of a genuinely useful composite |
| 44 | * function for a USB device, it also illustrates a technique of |
| 45 | * double-buffering for increased throughput. |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 46 | * |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 47 | * Function supports multiple logical units (LUNs). Backing storage |
| 48 | * for each LUN is provided by a regular file or a block device. |
| 49 | * Access for each LUN can be limited to read-only. Moreover, the |
| 50 | * function can indicate that LUN is removable and/or CD-ROM. (The |
| 51 | * later implies read-only access.) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 52 | * |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 53 | * MSF is configured by specifying a fsg_config structure. It has the |
| 54 | * following fields: |
| 55 | * |
| 56 | * nluns Number of LUNs function have (anywhere from 1 |
| 57 | * to FSG_MAX_LUNS which is 8). |
| 58 | * luns An array of LUN configuration values. This |
| 59 | * should be filled for each LUN that |
| 60 | * function will include (ie. for "nluns" |
| 61 | * LUNs). Each element of the array has |
| 62 | * the following fields: |
| 63 | * ->filename The path to the backing file for the LUN. |
| 64 | * Required if LUN is not marked as |
| 65 | * removable. |
| 66 | * ->ro Flag specifying access to the LUN shall be |
| 67 | * read-only. This is implied if CD-ROM |
| 68 | * emulation is enabled as well as when |
| 69 | * it was impossible to open "filename" |
| 70 | * in R/W mode. |
| 71 | * ->removable Flag specifying that LUN shall be indicated as |
| 72 | * being removable. |
| 73 | * ->cdrom Flag specifying that LUN shall be reported as |
| 74 | * being a CD-ROM. |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 75 | * ->nofua Flag specifying that FUA flag in SCSI WRITE(10,12) |
| 76 | * commands for this LUN shall be ignored. |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 77 | * |
| 78 | * lun_name_format A printf-like format for names of the LUN |
| 79 | * devices. This determines how the |
| 80 | * directory in sysfs will be named. |
| 81 | * Unless you are using several MSFs in |
| 82 | * a single gadget (as opposed to single |
| 83 | * MSF in many configurations) you may |
| 84 | * leave it as NULL (in which case |
| 85 | * "lun%d" will be used). In the format |
| 86 | * you can use "%d" to index LUNs for |
| 87 | * MSF's with more than one LUN. (Beware |
| 88 | * that there is only one integer given |
| 89 | * as an argument for the format and |
| 90 | * specifying invalid format may cause |
| 91 | * unspecified behaviour.) |
| 92 | * thread_name Name of the kernel thread process used by the |
| 93 | * MSF. You can safely set it to NULL |
| 94 | * (in which case default "file-storage" |
| 95 | * will be used). |
| 96 | * |
| 97 | * vendor_name |
| 98 | * product_name |
| 99 | * release Information used as a reply to INQUIRY |
| 100 | * request. To use default set to NULL, |
| 101 | * NULL, 0xffff respectively. The first |
| 102 | * field should be 8 and the second 16 |
| 103 | * characters or less. |
| 104 | * |
| 105 | * can_stall Set to permit function to halt bulk endpoints. |
| 106 | * Disabled on some USB devices known not |
| 107 | * to work correctly. You should set it |
| 108 | * to true. |
| 109 | * |
| 110 | * If "removable" is not set for a LUN then a backing file must be |
| 111 | * specified. If it is set, then NULL filename means the LUN's medium |
| 112 | * is not loaded (an empty string as "filename" in the fsg_config |
| 113 | * structure causes error). The CD-ROM emulation includes a single |
| 114 | * data track and no audio tracks; hence there need be only one |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 115 | * backing file per LUN. |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 116 | * |
| 117 | * |
| 118 | * MSF includes support for module parameters. If gadget using it |
| 119 | * decides to use it, the following module parameters will be |
| 120 | * available: |
| 121 | * |
| 122 | * file=filename[,filename...] |
| 123 | * Names of the files or block devices used for |
| 124 | * backing storage. |
| 125 | * ro=b[,b...] Default false, boolean for read-only access. |
| 126 | * removable=b[,b...] |
| 127 | * Default true, boolean for removable media. |
| 128 | * cdrom=b[,b...] Default false, boolean for whether to emulate |
| 129 | * a CD-ROM drive. |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 130 | * nofua=b[,b...] Default false, booleans for ignore FUA flag |
| 131 | * in SCSI WRITE(10,12) commands |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 132 | * luns=N Default N = number of filenames, number of |
| 133 | * LUNs to support. |
| 134 | * stall Default determined according to the type of |
| 135 | * USB device controller (usually true), |
| 136 | * boolean to permit the driver to halt |
| 137 | * bulk endpoints. |
| 138 | * |
| 139 | * The module parameters may be prefixed with some string. You need |
| 140 | * to consult gadget's documentation or source to verify whether it is |
| 141 | * using those module parameters and if it does what are the prefixes |
| 142 | * (look for FSG_MODULE_PARAMETERS() macro usage, what's inside it is |
| 143 | * the prefix). |
| 144 | * |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 145 | * |
| 146 | * Requirements are modest; only a bulk-in and a bulk-out endpoint are |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 147 | * needed. The memory requirement amounts to two 16K buffers, size |
| 148 | * configurable by a parameter. Support is included for both |
| 149 | * full-speed and high-speed operation. |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 150 | * |
| 151 | * Note that the driver is slightly non-portable in that it assumes a |
| 152 | * single memory/DMA buffer will be useable for bulk-in, bulk-out, and |
| 153 | * interrupt-in endpoints. With most device controllers this isn't an |
| 154 | * issue, but there may be some with hardware restrictions that prevent |
| 155 | * a buffer from being used by more than one endpoint. |
| 156 | * |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 157 | * |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 158 | * The pathnames of the backing files and the ro settings are |
| 159 | * available in the attribute files "file" and "ro" in the lun<n> (or |
| 160 | * to be more precise in a directory which name comes from |
| 161 | * "lun_name_format" option!) subdirectory of the gadget's sysfs |
| 162 | * directory. If the "removable" option is set, writing to these |
| 163 | * files will simulate ejecting/loading the medium (writing an empty |
| 164 | * line means eject) and adjusting a write-enable tab. Changes to the |
| 165 | * ro setting are not allowed when the medium is loaded or if CD-ROM |
| 166 | * emulation is being used. |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 167 | * |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 168 | * When a LUN receive an "eject" SCSI request (Start/Stop Unit), |
| 169 | * if the LUN is removable, the backing file is released to simulate |
| 170 | * ejection. |
| 171 | * |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 172 | * |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 173 | * This function is heavily based on "File-backed Storage Gadget" by |
| 174 | * Alan Stern which in turn is heavily based on "Gadget Zero" by David |
| 175 | * Brownell. The driver's SCSI command interface was based on the |
| 176 | * "Information technology - Small Computer System Interface - 2" |
| 177 | * document from X3T9.2 Project 375D, Revision 10L, 7-SEP-93, |
| 178 | * available at <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>. |
| 179 | * The single exception is opcode 0x23 (READ FORMAT CAPACITIES), which |
| 180 | * was based on the "Universal Serial Bus Mass Storage Class UFI |
| 181 | * Command Specification" document, Revision 1.0, December 14, 1998, |
| 182 | * available at |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 183 | * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>. |
| 184 | */ |
| 185 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 186 | /* |
| 187 | * Driver Design |
| 188 | * |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 189 | * The MSF is fairly straightforward. There is a main kernel |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 190 | * thread that handles most of the work. Interrupt routines field |
| 191 | * callbacks from the controller driver: bulk- and interrupt-request |
| 192 | * completion notifications, endpoint-0 events, and disconnect events. |
| 193 | * Completion events are passed to the main thread by wakeup calls. Many |
| 194 | * ep0 requests are handled at interrupt time, but SetInterface, |
| 195 | * SetConfiguration, and device reset requests are forwarded to the |
| 196 | * thread in the form of "exceptions" using SIGUSR1 signals (since they |
| 197 | * should interrupt any ongoing file I/O operations). |
| 198 | * |
| 199 | * The thread's main routine implements the standard command/data/status |
| 200 | * parts of a SCSI interaction. It and its subroutines are full of tests |
| 201 | * for pending signals/exceptions -- all this polling is necessary since |
| 202 | * the kernel has no setjmp/longjmp equivalents. (Maybe this is an |
| 203 | * indication that the driver really wants to be running in userspace.) |
| 204 | * An important point is that so long as the thread is alive it keeps an |
| 205 | * open reference to the backing file. This will prevent unmounting |
| 206 | * the backing file's underlying filesystem and could cause problems |
| 207 | * during system shutdown, for example. To prevent such problems, the |
| 208 | * thread catches INT, TERM, and KILL signals and converts them into |
| 209 | * an EXIT exception. |
| 210 | * |
| 211 | * In normal operation the main thread is started during the gadget's |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 212 | * fsg_bind() callback and stopped during fsg_unbind(). But it can |
| 213 | * also exit when it receives a signal, and there's no point leaving |
| 214 | * the gadget running when the thread is dead. At of this moment, MSF |
| 215 | * provides no way to deregister the gadget when thread dies -- maybe |
| 216 | * a callback functions is needed. |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 217 | * |
| 218 | * To provide maximum throughput, the driver uses a circular pipeline of |
| 219 | * buffer heads (struct fsg_buffhd). In principle the pipeline can be |
| 220 | * arbitrarily long; in practice the benefits don't justify having more |
| 221 | * than 2 stages (i.e., double buffering). But it helps to think of the |
| 222 | * pipeline as being a long one. Each buffer head contains a bulk-in and |
| 223 | * a bulk-out request pointer (since the buffer can be used for both |
| 224 | * output and input -- directions always are given from the host's |
| 225 | * point of view) as well as a pointer to the buffer and various state |
| 226 | * variables. |
| 227 | * |
| 228 | * Use of the pipeline follows a simple protocol. There is a variable |
| 229 | * (fsg->next_buffhd_to_fill) that points to the next buffer head to use. |
| 230 | * At any time that buffer head may still be in use from an earlier |
| 231 | * request, so each buffer head has a state variable indicating whether |
| 232 | * it is EMPTY, FULL, or BUSY. Typical use involves waiting for the |
| 233 | * buffer head to be EMPTY, filling the buffer either by file I/O or by |
| 234 | * USB I/O (during which the buffer head is BUSY), and marking the buffer |
| 235 | * head FULL when the I/O is complete. Then the buffer will be emptied |
| 236 | * (again possibly by USB I/O, during which it is marked BUSY) and |
| 237 | * finally marked EMPTY again (possibly by a completion routine). |
| 238 | * |
| 239 | * A module parameter tells the driver to avoid stalling the bulk |
| 240 | * endpoints wherever the transport specification allows. This is |
| 241 | * necessary for some UDCs like the SuperH, which cannot reliably clear a |
| 242 | * halt on a bulk endpoint. However, under certain circumstances the |
| 243 | * Bulk-only specification requires a stall. In such cases the driver |
| 244 | * will halt the endpoint and set a flag indicating that it should clear |
| 245 | * the halt in software during the next device reset. Hopefully this |
| 246 | * will permit everything to work correctly. Furthermore, although the |
| 247 | * specification allows the bulk-out endpoint to halt when the host sends |
| 248 | * too much data, implementing this would cause an unavoidable race. |
| 249 | * The driver will always use the "no-stall" approach for OUT transfers. |
| 250 | * |
| 251 | * One subtle point concerns sending status-stage responses for ep0 |
| 252 | * requests. Some of these requests, such as device reset, can involve |
| 253 | * interrupting an ongoing file I/O operation, which might take an |
| 254 | * arbitrarily long time. During that delay the host might give up on |
| 255 | * the original ep0 request and issue a new one. When that happens the |
| 256 | * driver should not notify the host about completion of the original |
| 257 | * request, as the host will no longer be waiting for it. So the driver |
| 258 | * assigns to each ep0 request a unique tag, and it keeps track of the |
| 259 | * tag value of the request associated with a long-running exception |
| 260 | * (device-reset, interface-change, or configuration-change). When the |
| 261 | * exception handler is finished, the status-stage response is submitted |
| 262 | * only if the current ep0 request tag is equal to the exception request |
| 263 | * tag. Thus only the most recently received ep0 request will get a |
| 264 | * status-stage response. |
| 265 | * |
| 266 | * Warning: This driver source file is too long. It ought to be split up |
| 267 | * into a header file plus about 3 separate .c files, to handle the details |
| 268 | * of the Gadget, USB Mass Storage, and SCSI protocols. |
| 269 | */ |
| 270 | |
| 271 | |
| 272 | /* #define VERBOSE_DEBUG */ |
| 273 | /* #define DUMP_MSGS */ |
| 274 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 275 | #include <linux/blkdev.h> |
| 276 | #include <linux/completion.h> |
| 277 | #include <linux/dcache.h> |
| 278 | #include <linux/delay.h> |
| 279 | #include <linux/device.h> |
| 280 | #include <linux/fcntl.h> |
| 281 | #include <linux/file.h> |
| 282 | #include <linux/fs.h> |
| 283 | #include <linux/kref.h> |
| 284 | #include <linux/kthread.h> |
| 285 | #include <linux/limits.h> |
| 286 | #include <linux/rwsem.h> |
| 287 | #include <linux/slab.h> |
| 288 | #include <linux/spinlock.h> |
| 289 | #include <linux/string.h> |
| 290 | #include <linux/freezer.h> |
| 291 | #include <linux/utsname.h> |
| 292 | |
| 293 | #include <linux/usb/ch9.h> |
| 294 | #include <linux/usb/gadget.h> |
Jesper Juhl | a283c03 | 2011-01-29 02:26:51 +0100 | [diff] [blame] | 295 | #include <linux/usb/composite.h> |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 296 | |
| 297 | #include "gadget_chips.h" |
| 298 | |
| 299 | |
Michal Nazarewicz | e8b6f8c | 2009-11-09 14:15:22 +0100 | [diff] [blame] | 300 | /*------------------------------------------------------------------------*/ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 301 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 302 | #define FSG_DRIVER_DESC "Mass Storage Function" |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 303 | #define FSG_DRIVER_VERSION "2009/09/11" |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 304 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 305 | static const char fsg_string_interface[] = "Mass Storage"; |
| 306 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 307 | #define FSG_NO_DEVICE_STRINGS 1 |
| 308 | #define FSG_NO_OTG 1 |
| 309 | #define FSG_NO_INTR_EP 1 |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 310 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 311 | #include "storage_common.c" |
| 312 | |
| 313 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 314 | /*-------------------------------------------------------------------------*/ |
| 315 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 316 | struct fsg_dev; |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 317 | struct fsg_common; |
| 318 | |
| 319 | /* FSF callback functions */ |
| 320 | struct fsg_operations { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 321 | /* |
| 322 | * Callback function to call when thread exits. If no |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 323 | * callback is set or it returns value lower then zero MSF |
| 324 | * will force eject all LUNs it operates on (including those |
| 325 | * marked as non-removable or with prevent_medium_removal flag |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 326 | * set). |
| 327 | */ |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 328 | int (*thread_exits)(struct fsg_common *common); |
| 329 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 330 | /* |
| 331 | * Called prior to ejection. Negative return means error, |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 332 | * zero means to continue with ejection, positive means not to |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 333 | * eject. |
| 334 | */ |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 335 | int (*pre_eject)(struct fsg_common *common, |
| 336 | struct fsg_lun *lun, int num); |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 337 | /* |
| 338 | * Called after ejection. Negative return means error, zero |
| 339 | * or positive is just a success. |
| 340 | */ |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 341 | int (*post_eject)(struct fsg_common *common, |
| 342 | struct fsg_lun *lun, int num); |
| 343 | }; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 344 | |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 345 | /* Data shared by all the FSG instances. */ |
| 346 | struct fsg_common { |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 347 | struct usb_gadget *gadget; |
Roger Quadros | 95ed323 | 2011-05-09 13:08:07 +0300 | [diff] [blame] | 348 | struct usb_composite_dev *cdev; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 349 | struct fsg_dev *fsg, *new_fsg; |
| 350 | wait_queue_head_t fsg_wait; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 351 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 352 | /* filesem protects: backing files in use */ |
| 353 | struct rw_semaphore filesem; |
| 354 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 355 | /* lock protects: state, all the req_busy's */ |
| 356 | spinlock_t lock; |
| 357 | |
| 358 | struct usb_ep *ep0; /* Copy of gadget->ep0 */ |
| 359 | struct usb_request *ep0req; /* Copy of cdev->req */ |
| 360 | unsigned int ep0_req_tag; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 361 | |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 362 | struct fsg_buffhd *next_buffhd_to_fill; |
| 363 | struct fsg_buffhd *next_buffhd_to_drain; |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 364 | struct fsg_buffhd *buffhds; |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 365 | |
| 366 | int cmnd_size; |
| 367 | u8 cmnd[MAX_COMMAND_SIZE]; |
| 368 | |
| 369 | unsigned int nluns; |
| 370 | unsigned int lun; |
| 371 | struct fsg_lun *luns; |
| 372 | struct fsg_lun *curlun; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 373 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 374 | unsigned int bulk_out_maxpacket; |
| 375 | enum fsg_state state; /* For exception handling */ |
| 376 | unsigned int exception_req_tag; |
| 377 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 378 | enum data_direction data_dir; |
| 379 | u32 data_size; |
| 380 | u32 data_size_from_cmnd; |
| 381 | u32 tag; |
| 382 | u32 residue; |
| 383 | u32 usb_amount_left; |
| 384 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 385 | unsigned int can_stall:1; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 386 | unsigned int free_storage_on_release:1; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 387 | unsigned int phase_error:1; |
| 388 | unsigned int short_packet_received:1; |
| 389 | unsigned int bad_lun_okay:1; |
| 390 | unsigned int running:1; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 391 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 392 | int thread_wakeup_needed; |
| 393 | struct completion thread_notifier; |
| 394 | struct task_struct *thread_task; |
Michal Nazarewicz | e8b6f8c | 2009-11-09 14:15:22 +0100 | [diff] [blame] | 395 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 396 | /* Callback functions. */ |
| 397 | const struct fsg_operations *ops; |
Michal Nazarewicz | c85efcb | 2009-11-09 14:15:26 +0100 | [diff] [blame] | 398 | /* Gadget's private data. */ |
| 399 | void *private_data; |
| 400 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 401 | /* |
| 402 | * Vendor (8 chars), product (16 chars), release (4 |
| 403 | * hexadecimal digits) and NUL byte |
| 404 | */ |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 405 | char inquiry_string[8 + 16 + 4 + 1]; |
| 406 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 407 | struct kref ref; |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 408 | }; |
| 409 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 410 | struct fsg_config { |
| 411 | unsigned nluns; |
| 412 | struct fsg_lun_config { |
| 413 | const char *filename; |
| 414 | char ro; |
| 415 | char removable; |
| 416 | char cdrom; |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 417 | char nofua; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 418 | } luns[FSG_MAX_LUNS]; |
| 419 | |
Michal Nazarewicz | e8b6f8c | 2009-11-09 14:15:22 +0100 | [diff] [blame] | 420 | const char *lun_name_format; |
| 421 | const char *thread_name; |
| 422 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 423 | /* Callback functions. */ |
| 424 | const struct fsg_operations *ops; |
Michal Nazarewicz | c85efcb | 2009-11-09 14:15:26 +0100 | [diff] [blame] | 425 | /* Gadget's private data. */ |
| 426 | void *private_data; |
| 427 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 428 | const char *vendor_name; /* 8 characters or less */ |
| 429 | const char *product_name; /* 16 characters or less */ |
| 430 | u16 release; |
| 431 | |
| 432 | char can_stall; |
| 433 | }; |
| 434 | |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 435 | struct fsg_dev { |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 436 | struct usb_function function; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 437 | struct usb_gadget *gadget; /* Copy of cdev->gadget */ |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 438 | struct fsg_common *common; |
| 439 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 440 | u16 interface_number; |
| 441 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 442 | unsigned int bulk_in_enabled:1; |
| 443 | unsigned int bulk_out_enabled:1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 444 | |
| 445 | unsigned long atomic_bitflags; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 446 | #define IGNORE_BULK_OUT 0 |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 447 | |
| 448 | struct usb_ep *bulk_in; |
| 449 | struct usb_ep *bulk_out; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 450 | }; |
| 451 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 452 | static inline int __fsg_is_set(struct fsg_common *common, |
| 453 | const char *func, unsigned line) |
| 454 | { |
| 455 | if (common->fsg) |
| 456 | return 1; |
| 457 | ERROR(common, "common->fsg is NULL in %s at %u\n", func, line); |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 458 | WARN_ON(1); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | #define fsg_is_set(common) likely(__fsg_is_set(common, __func__, __LINE__)) |
| 463 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 464 | static inline struct fsg_dev *fsg_from_func(struct usb_function *f) |
| 465 | { |
| 466 | return container_of(f, struct fsg_dev, function); |
| 467 | } |
| 468 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 469 | typedef void (*fsg_routine_t)(struct fsg_dev *); |
| 470 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 471 | static int exception_in_progress(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 472 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 473 | return common->state > FSG_STATE_IDLE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 474 | } |
| 475 | |
Greg Kroah-Hartman | 98346f7 | 2011-04-14 13:42:46 -0700 | [diff] [blame] | 476 | /* Make bulk-out requests be divisible by the maxpacket size */ |
| 477 | static void set_bulk_out_req_length(struct fsg_common *common, |
| 478 | struct fsg_buffhd *bh, unsigned int length) |
| 479 | { |
| 480 | unsigned int rem; |
| 481 | |
| 482 | bh->bulk_out_intended_length = length; |
| 483 | rem = length % common->bulk_out_maxpacket; |
| 484 | if (rem > 0) |
| 485 | length += common->bulk_out_maxpacket - rem; |
| 486 | bh->outreq->length = length; |
| 487 | } |
| 488 | |
| 489 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 490 | /*-------------------------------------------------------------------------*/ |
| 491 | |
| 492 | static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep) |
| 493 | { |
| 494 | const char *name; |
| 495 | |
| 496 | if (ep == fsg->bulk_in) |
| 497 | name = "bulk-in"; |
| 498 | else if (ep == fsg->bulk_out) |
| 499 | name = "bulk-out"; |
| 500 | else |
| 501 | name = ep->name; |
| 502 | DBG(fsg, "%s set halt\n", name); |
| 503 | return usb_ep_set_halt(ep); |
| 504 | } |
| 505 | |
| 506 | |
| 507 | /*-------------------------------------------------------------------------*/ |
| 508 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 509 | /* These routines may be called in process context or in_irq */ |
| 510 | |
| 511 | /* Caller must hold fsg->lock */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 512 | static void wakeup_thread(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 513 | { |
| 514 | /* Tell the main thread that something has happened */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 515 | common->thread_wakeup_needed = 1; |
| 516 | if (common->thread_task) |
| 517 | wake_up_process(common->thread_task); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 518 | } |
| 519 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 520 | static void raise_exception(struct fsg_common *common, enum fsg_state new_state) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 521 | { |
| 522 | unsigned long flags; |
| 523 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 524 | /* |
| 525 | * Do nothing if a higher-priority exception is already in progress. |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 526 | * If a lower-or-equal priority exception is in progress, preempt it |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 527 | * and notify the main thread by sending it a signal. |
| 528 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 529 | spin_lock_irqsave(&common->lock, flags); |
| 530 | if (common->state <= new_state) { |
| 531 | common->exception_req_tag = common->ep0_req_tag; |
| 532 | common->state = new_state; |
| 533 | if (common->thread_task) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 534 | send_sig_info(SIGUSR1, SEND_SIG_FORCED, |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 535 | common->thread_task); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 536 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 537 | spin_unlock_irqrestore(&common->lock, flags); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 538 | } |
| 539 | |
| 540 | |
| 541 | /*-------------------------------------------------------------------------*/ |
| 542 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 543 | static int ep0_queue(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 544 | { |
| 545 | int rc; |
| 546 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 547 | rc = usb_ep_queue(common->ep0, common->ep0req, GFP_ATOMIC); |
| 548 | common->ep0->driver_data = common; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 549 | if (rc != 0 && rc != -ESHUTDOWN) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 550 | /* We can't do much more than wait for a reset */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 551 | WARNING(common, "error in submission: %s --> %d\n", |
| 552 | common->ep0->name, rc); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 553 | } |
| 554 | return rc; |
| 555 | } |
| 556 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 557 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 558 | /*-------------------------------------------------------------------------*/ |
| 559 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 560 | /* Completion handlers. These always run in_irq. */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 561 | |
| 562 | static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req) |
| 563 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 564 | struct fsg_common *common = ep->driver_data; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 565 | struct fsg_buffhd *bh = req->context; |
| 566 | |
| 567 | if (req->status || req->actual != req->length) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 568 | DBG(common, "%s --> %d, %u/%u\n", __func__, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 569 | req->status, req->actual, req->length); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 570 | if (req->status == -ECONNRESET) /* Request was cancelled */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 571 | usb_ep_fifo_flush(ep); |
| 572 | |
| 573 | /* Hold the lock while we update the request and buffer states */ |
| 574 | smp_wmb(); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 575 | spin_lock(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 576 | bh->inreq_busy = 0; |
| 577 | bh->state = BUF_STATE_EMPTY; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 578 | wakeup_thread(common); |
| 579 | spin_unlock(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req) |
| 583 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 584 | struct fsg_common *common = ep->driver_data; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 585 | struct fsg_buffhd *bh = req->context; |
| 586 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 587 | dump_msg(common, "bulk-out", req->buf, req->actual); |
Greg Kroah-Hartman | 98346f7 | 2011-04-14 13:42:46 -0700 | [diff] [blame] | 588 | if (req->status || req->actual != bh->bulk_out_intended_length) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 589 | DBG(common, "%s --> %d, %u/%u\n", __func__, |
Greg Kroah-Hartman | 98346f7 | 2011-04-14 13:42:46 -0700 | [diff] [blame] | 590 | req->status, req->actual, bh->bulk_out_intended_length); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 591 | if (req->status == -ECONNRESET) /* Request was cancelled */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 592 | usb_ep_fifo_flush(ep); |
| 593 | |
| 594 | /* Hold the lock while we update the request and buffer states */ |
| 595 | smp_wmb(); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 596 | spin_lock(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 597 | bh->outreq_busy = 0; |
| 598 | bh->state = BUF_STATE_FULL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 599 | wakeup_thread(common); |
| 600 | spin_unlock(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 601 | } |
| 602 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 603 | static int fsg_setup(struct usb_function *f, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 604 | const struct usb_ctrlrequest *ctrl) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 605 | { |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 606 | struct fsg_dev *fsg = fsg_from_func(f); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 607 | struct usb_request *req = fsg->common->ep0req; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 608 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 609 | u16 w_value = le16_to_cpu(ctrl->wValue); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 610 | u16 w_length = le16_to_cpu(ctrl->wLength); |
| 611 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 612 | if (!fsg_is_set(fsg->common)) |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 613 | return -EOPNOTSUPP; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 614 | |
Roger Quadros | 73ee4da | 2011-04-05 18:36:38 +0300 | [diff] [blame] | 615 | ++fsg->common->ep0_req_tag; /* Record arrival of a new request */ |
| 616 | req->context = NULL; |
| 617 | req->length = 0; |
| 618 | dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl)); |
| 619 | |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 620 | switch (ctrl->bRequest) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 621 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 622 | case US_BULK_RESET_REQUEST: |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 623 | if (ctrl->bRequestType != |
| 624 | (USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 625 | break; |
Paul Zimmerman | ce7b612 | 2011-10-26 12:07:54 -0700 | [diff] [blame] | 626 | if (w_index != fsg->interface_number || w_value != 0 || |
| 627 | w_length != 0) |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 628 | return -EDOM; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 629 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 630 | /* |
| 631 | * Raise an exception to stop the current operation |
| 632 | * and reinitialize our state. |
| 633 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 634 | DBG(fsg, "bulk reset request\n"); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 635 | raise_exception(fsg->common, FSG_STATE_RESET); |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 636 | return DELAYED_STATUS; |
| 637 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 638 | case US_BULK_GET_MAX_LUN: |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 639 | if (ctrl->bRequestType != |
| 640 | (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 641 | break; |
Paul Zimmerman | db332bc | 2011-10-13 17:46:36 -0700 | [diff] [blame] | 642 | if (w_index != fsg->interface_number || w_value != 0 || |
| 643 | w_length != 1) |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 644 | return -EDOM; |
| 645 | VDBG(fsg, "get max LUN\n"); |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 646 | *(u8 *)req->buf = fsg->common->nluns - 1; |
Michal Nazarewicz | b00ce11 | 2010-01-27 11:14:28 +0100 | [diff] [blame] | 647 | |
| 648 | /* Respond with data/status */ |
Michal Nazarewicz | d7e18a9 | 2010-02-03 11:37:17 +0100 | [diff] [blame] | 649 | req->length = min((u16)1, w_length); |
Michal Nazarewicz | b00ce11 | 2010-01-27 11:14:28 +0100 | [diff] [blame] | 650 | return ep0_queue(fsg->common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 651 | } |
| 652 | |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 653 | VDBG(fsg, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 654 | "unknown class-specific control req %02x.%02x v%04x i%04x l%u\n", |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 655 | ctrl->bRequestType, ctrl->bRequest, |
| 656 | le16_to_cpu(ctrl->wValue), w_index, w_length); |
| 657 | return -EOPNOTSUPP; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 658 | } |
| 659 | |
| 660 | |
| 661 | /*-------------------------------------------------------------------------*/ |
| 662 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 663 | /* All the following routines run in process context */ |
| 664 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 665 | /* Use this for bulk or interrupt transfers, not ep0 */ |
| 666 | static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 667 | struct usb_request *req, int *pbusy, |
| 668 | enum fsg_buffer_state *state) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 669 | { |
| 670 | int rc; |
| 671 | |
| 672 | if (ep == fsg->bulk_in) |
| 673 | dump_msg(fsg, "bulk-in", req->buf, req->length); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 674 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 675 | spin_lock_irq(&fsg->common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 676 | *pbusy = 1; |
| 677 | *state = BUF_STATE_BUSY; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 678 | spin_unlock_irq(&fsg->common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 679 | rc = usb_ep_queue(ep, req, GFP_KERNEL); |
| 680 | if (rc != 0) { |
| 681 | *pbusy = 0; |
| 682 | *state = BUF_STATE_EMPTY; |
| 683 | |
| 684 | /* We can't do much more than wait for a reset */ |
| 685 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 686 | /* |
| 687 | * Note: currently the net2280 driver fails zero-length |
| 688 | * submissions if DMA is enabled. |
| 689 | */ |
| 690 | if (rc != -ESHUTDOWN && |
| 691 | !(rc == -EOPNOTSUPP && req->length == 0)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 692 | WARNING(fsg, "error in submission: %s --> %d\n", |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 693 | ep->name, rc); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 694 | } |
| 695 | } |
| 696 | |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 697 | static bool start_in_transfer(struct fsg_common *common, struct fsg_buffhd *bh) |
| 698 | { |
| 699 | if (!fsg_is_set(common)) |
| 700 | return false; |
| 701 | start_transfer(common->fsg, common->fsg->bulk_in, |
| 702 | bh->inreq, &bh->inreq_busy, &bh->state); |
| 703 | return true; |
| 704 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 705 | |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 706 | static bool start_out_transfer(struct fsg_common *common, struct fsg_buffhd *bh) |
| 707 | { |
| 708 | if (!fsg_is_set(common)) |
| 709 | return false; |
| 710 | start_transfer(common->fsg, common->fsg->bulk_out, |
| 711 | bh->outreq, &bh->outreq_busy, &bh->state); |
| 712 | return true; |
| 713 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 714 | |
| 715 | static int sleep_thread(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 716 | { |
| 717 | int rc = 0; |
| 718 | |
| 719 | /* Wait until a signal arrives or we are woken up */ |
| 720 | for (;;) { |
| 721 | try_to_freeze(); |
| 722 | set_current_state(TASK_INTERRUPTIBLE); |
| 723 | if (signal_pending(current)) { |
| 724 | rc = -EINTR; |
| 725 | break; |
| 726 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 727 | if (common->thread_wakeup_needed) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 728 | break; |
| 729 | schedule(); |
| 730 | } |
| 731 | __set_current_state(TASK_RUNNING); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 732 | common->thread_wakeup_needed = 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 733 | return rc; |
| 734 | } |
| 735 | |
| 736 | |
| 737 | /*-------------------------------------------------------------------------*/ |
| 738 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 739 | static int do_read(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 740 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 741 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 742 | u32 lba; |
| 743 | struct fsg_buffhd *bh; |
| 744 | int rc; |
| 745 | u32 amount_left; |
| 746 | loff_t file_offset, file_offset_tmp; |
| 747 | unsigned int amount; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 748 | ssize_t nread; |
| 749 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 750 | /* |
| 751 | * Get the starting Logical Block Address and check that it's |
| 752 | * not too big. |
| 753 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 754 | if (common->cmnd[0] == READ_6) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 755 | lba = get_unaligned_be24(&common->cmnd[1]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 756 | else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 757 | lba = get_unaligned_be32(&common->cmnd[2]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 758 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 759 | /* |
| 760 | * We allow DPO (Disable Page Out = don't save data in the |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 761 | * cache) and FUA (Force Unit Access = don't read from the |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 762 | * cache), but we don't implement them. |
| 763 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 764 | if ((common->cmnd[1] & ~0x18) != 0) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 765 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 766 | return -EINVAL; |
| 767 | } |
| 768 | } |
| 769 | if (lba >= curlun->num_sectors) { |
| 770 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 771 | return -EINVAL; |
| 772 | } |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 773 | file_offset = ((loff_t) lba) << curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 774 | |
| 775 | /* Carry out the file reads */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 776 | amount_left = common->data_size_from_cmnd; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 777 | if (unlikely(amount_left == 0)) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 778 | return -EIO; /* No default reply */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 779 | |
| 780 | for (;;) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 781 | /* |
| 782 | * Figure out how much we need to read: |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 783 | * Try to read the remaining amount. |
| 784 | * But don't read more than the buffer size. |
| 785 | * And don't try to read past the end of the file. |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 786 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 787 | amount = min(amount_left, FSG_BUFLEN); |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 788 | amount = min((loff_t)amount, |
| 789 | curlun->file_length - file_offset); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 790 | |
| 791 | /* Wait for the next buffer to become available */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 792 | bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 793 | while (bh->state != BUF_STATE_EMPTY) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 794 | rc = sleep_thread(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 795 | if (rc) |
| 796 | return rc; |
| 797 | } |
| 798 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 799 | /* |
| 800 | * If we were asked to read past the end of file, |
| 801 | * end with an empty buffer. |
| 802 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 803 | if (amount == 0) { |
| 804 | curlun->sense_data = |
| 805 | SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 806 | curlun->sense_data_info = |
| 807 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 808 | curlun->info_valid = 1; |
| 809 | bh->inreq->length = 0; |
| 810 | bh->state = BUF_STATE_FULL; |
| 811 | break; |
| 812 | } |
| 813 | |
| 814 | /* Perform the read */ |
| 815 | file_offset_tmp = file_offset; |
| 816 | nread = vfs_read(curlun->filp, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 817 | (char __user *)bh->buf, |
| 818 | amount, &file_offset_tmp); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 819 | VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 820 | (unsigned long long)file_offset, (int)nread); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 821 | if (signal_pending(current)) |
| 822 | return -EINTR; |
| 823 | |
| 824 | if (nread < 0) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 825 | LDBG(curlun, "error in file read: %d\n", (int)nread); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 826 | nread = 0; |
| 827 | } else if (nread < amount) { |
| 828 | LDBG(curlun, "partial file read: %d/%u\n", |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 829 | (int)nread, amount); |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 830 | nread = round_down(nread, curlun->blksize); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 831 | } |
| 832 | file_offset += nread; |
| 833 | amount_left -= nread; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 834 | common->residue -= nread; |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 835 | |
| 836 | /* |
| 837 | * Except at the end of the transfer, nread will be |
| 838 | * equal to the buffer size, which is divisible by the |
| 839 | * bulk-in maxpacket size. |
| 840 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 841 | bh->inreq->length = nread; |
| 842 | bh->state = BUF_STATE_FULL; |
| 843 | |
| 844 | /* If an error occurred, report it and its position */ |
| 845 | if (nread < amount) { |
| 846 | curlun->sense_data = SS_UNRECOVERED_READ_ERROR; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 847 | curlun->sense_data_info = |
| 848 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 849 | curlun->info_valid = 1; |
| 850 | break; |
| 851 | } |
| 852 | |
| 853 | if (amount_left == 0) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 854 | break; /* No more left to read */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 855 | |
| 856 | /* Send this buffer and go read some more */ |
| 857 | bh->inreq->zero = 0; |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 858 | if (!start_in_transfer(common, bh)) |
| 859 | /* Don't know what to do if common->fsg is NULL */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 860 | return -EIO; |
| 861 | common->next_buffhd_to_fill = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 862 | } |
| 863 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 864 | return -EIO; /* No default reply */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 865 | } |
| 866 | |
| 867 | |
| 868 | /*-------------------------------------------------------------------------*/ |
| 869 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 870 | static int do_write(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 871 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 872 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 873 | u32 lba; |
| 874 | struct fsg_buffhd *bh; |
| 875 | int get_some_more; |
| 876 | u32 amount_left_to_req, amount_left_to_write; |
| 877 | loff_t usb_offset, file_offset, file_offset_tmp; |
| 878 | unsigned int amount; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 879 | ssize_t nwritten; |
| 880 | int rc; |
| 881 | |
| 882 | if (curlun->ro) { |
| 883 | curlun->sense_data = SS_WRITE_PROTECTED; |
| 884 | return -EINVAL; |
| 885 | } |
| 886 | spin_lock(&curlun->filp->f_lock); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 887 | curlun->filp->f_flags &= ~O_SYNC; /* Default is not to wait */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 888 | spin_unlock(&curlun->filp->f_lock); |
| 889 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 890 | /* |
| 891 | * Get the starting Logical Block Address and check that it's |
| 892 | * not too big |
| 893 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 894 | if (common->cmnd[0] == WRITE_6) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 895 | lba = get_unaligned_be24(&common->cmnd[1]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 896 | else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 897 | lba = get_unaligned_be32(&common->cmnd[2]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 898 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 899 | /* |
| 900 | * We allow DPO (Disable Page Out = don't save data in the |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 901 | * cache) and FUA (Force Unit Access = write directly to the |
| 902 | * medium). We don't implement DPO; we implement FUA by |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 903 | * performing synchronous output. |
| 904 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 905 | if (common->cmnd[1] & ~0x18) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 906 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 907 | return -EINVAL; |
| 908 | } |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 909 | if (!curlun->nofua && (common->cmnd[1] & 0x08)) { /* FUA */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 910 | spin_lock(&curlun->filp->f_lock); |
| 911 | curlun->filp->f_flags |= O_SYNC; |
| 912 | spin_unlock(&curlun->filp->f_lock); |
| 913 | } |
| 914 | } |
| 915 | if (lba >= curlun->num_sectors) { |
| 916 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 917 | return -EINVAL; |
| 918 | } |
| 919 | |
| 920 | /* Carry out the file writes */ |
| 921 | get_some_more = 1; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 922 | file_offset = usb_offset = ((loff_t) lba) << curlun->blkbits; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 923 | amount_left_to_req = common->data_size_from_cmnd; |
| 924 | amount_left_to_write = common->data_size_from_cmnd; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 925 | |
| 926 | while (amount_left_to_write > 0) { |
| 927 | |
| 928 | /* Queue a request for more data from the host */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 929 | bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 930 | if (bh->state == BUF_STATE_EMPTY && get_some_more) { |
| 931 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 932 | /* |
| 933 | * Figure out how much we want to get: |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 934 | * Try to get the remaining amount, |
| 935 | * but not more than the buffer size. |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 936 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 937 | amount = min(amount_left_to_req, FSG_BUFLEN); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 938 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 939 | /* Beyond the end of the backing file? */ |
| 940 | if (usb_offset >= curlun->file_length) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 941 | get_some_more = 0; |
| 942 | curlun->sense_data = |
| 943 | SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 944 | curlun->sense_data_info = |
| 945 | usb_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 946 | curlun->info_valid = 1; |
| 947 | continue; |
| 948 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 949 | |
| 950 | /* Get the next buffer */ |
| 951 | usb_offset += amount; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 952 | common->usb_amount_left -= amount; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 953 | amount_left_to_req -= amount; |
| 954 | if (amount_left_to_req == 0) |
| 955 | get_some_more = 0; |
| 956 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 957 | /* |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 958 | * Except at the end of the transfer, amount will be |
| 959 | * equal to the buffer size, which is divisible by |
| 960 | * the bulk-out maxpacket size. |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 961 | */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 962 | set_bulk_out_req_length(common, bh, amount); |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 963 | if (!start_out_transfer(common, bh)) |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 964 | /* Dunno what to do if common->fsg is NULL */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 965 | return -EIO; |
| 966 | common->next_buffhd_to_fill = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 967 | continue; |
| 968 | } |
| 969 | |
| 970 | /* Write the received data to the backing file */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 971 | bh = common->next_buffhd_to_drain; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 972 | if (bh->state == BUF_STATE_EMPTY && !get_some_more) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 973 | break; /* We stopped early */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 974 | if (bh->state == BUF_STATE_FULL) { |
| 975 | smp_rmb(); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 976 | common->next_buffhd_to_drain = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 977 | bh->state = BUF_STATE_EMPTY; |
| 978 | |
| 979 | /* Did something go wrong with the transfer? */ |
| 980 | if (bh->outreq->status != 0) { |
| 981 | curlun->sense_data = SS_COMMUNICATION_FAILURE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 982 | curlun->sense_data_info = |
| 983 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 984 | curlun->info_valid = 1; |
| 985 | break; |
| 986 | } |
| 987 | |
| 988 | amount = bh->outreq->actual; |
| 989 | if (curlun->file_length - file_offset < amount) { |
| 990 | LERROR(curlun, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 991 | "write %u @ %llu beyond end %llu\n", |
| 992 | amount, (unsigned long long)file_offset, |
| 993 | (unsigned long long)curlun->file_length); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 994 | amount = curlun->file_length - file_offset; |
| 995 | } |
| 996 | |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 997 | /* Don't accept excess data. The spec doesn't say |
| 998 | * what to do in this case. We'll ignore the error. |
| 999 | */ |
| 1000 | amount = min(amount, bh->bulk_out_intended_length); |
| 1001 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1002 | /* Don't write a partial block */ |
| 1003 | amount = round_down(amount, curlun->blksize); |
| 1004 | if (amount == 0) |
| 1005 | goto empty_write; |
| 1006 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1007 | /* Perform the write */ |
| 1008 | file_offset_tmp = file_offset; |
| 1009 | nwritten = vfs_write(curlun->filp, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1010 | (char __user *)bh->buf, |
| 1011 | amount, &file_offset_tmp); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1012 | VLDBG(curlun, "file write %u @ %llu -> %d\n", amount, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1013 | (unsigned long long)file_offset, (int)nwritten); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1014 | if (signal_pending(current)) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1015 | return -EINTR; /* Interrupted! */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1016 | |
| 1017 | if (nwritten < 0) { |
| 1018 | LDBG(curlun, "error in file write: %d\n", |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1019 | (int)nwritten); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1020 | nwritten = 0; |
| 1021 | } else if (nwritten < amount) { |
| 1022 | LDBG(curlun, "partial file write: %d/%u\n", |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1023 | (int)nwritten, amount); |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1024 | nwritten = round_down(nwritten, curlun->blksize); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1025 | } |
| 1026 | file_offset += nwritten; |
| 1027 | amount_left_to_write -= nwritten; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1028 | common->residue -= nwritten; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1029 | |
| 1030 | /* If an error occurred, report it and its position */ |
| 1031 | if (nwritten < amount) { |
| 1032 | curlun->sense_data = SS_WRITE_ERROR; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1033 | curlun->sense_data_info = |
| 1034 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1035 | curlun->info_valid = 1; |
| 1036 | break; |
| 1037 | } |
| 1038 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1039 | empty_write: |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1040 | /* Did the host decide to stop early? */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 1041 | if (bh->outreq->actual < bh->bulk_out_intended_length) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1042 | common->short_packet_received = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1043 | break; |
| 1044 | } |
| 1045 | continue; |
| 1046 | } |
| 1047 | |
| 1048 | /* Wait for something to happen */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1049 | rc = sleep_thread(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1050 | if (rc) |
| 1051 | return rc; |
| 1052 | } |
| 1053 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1054 | return -EIO; /* No default reply */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1055 | } |
| 1056 | |
| 1057 | |
| 1058 | /*-------------------------------------------------------------------------*/ |
| 1059 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1060 | static int do_synchronize_cache(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1061 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1062 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1063 | int rc; |
| 1064 | |
| 1065 | /* We ignore the requested LBA and write out all file's |
| 1066 | * dirty data buffers. */ |
| 1067 | rc = fsg_lun_fsync_sub(curlun); |
| 1068 | if (rc) |
| 1069 | curlun->sense_data = SS_WRITE_ERROR; |
| 1070 | return 0; |
| 1071 | } |
| 1072 | |
| 1073 | |
| 1074 | /*-------------------------------------------------------------------------*/ |
| 1075 | |
| 1076 | static void invalidate_sub(struct fsg_lun *curlun) |
| 1077 | { |
| 1078 | struct file *filp = curlun->filp; |
| 1079 | struct inode *inode = filp->f_path.dentry->d_inode; |
| 1080 | unsigned long rc; |
| 1081 | |
| 1082 | rc = invalidate_mapping_pages(inode->i_mapping, 0, -1); |
Christoph Hellwig | 2ecdc82 | 2010-01-26 17:27:20 +0100 | [diff] [blame] | 1083 | VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1084 | } |
| 1085 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1086 | static int do_verify(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1087 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1088 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1089 | u32 lba; |
| 1090 | u32 verification_length; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1091 | struct fsg_buffhd *bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1092 | loff_t file_offset, file_offset_tmp; |
| 1093 | u32 amount_left; |
| 1094 | unsigned int amount; |
| 1095 | ssize_t nread; |
| 1096 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1097 | /* |
| 1098 | * Get the starting Logical Block Address and check that it's |
| 1099 | * not too big. |
| 1100 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1101 | lba = get_unaligned_be32(&common->cmnd[2]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1102 | if (lba >= curlun->num_sectors) { |
| 1103 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 1104 | return -EINVAL; |
| 1105 | } |
| 1106 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1107 | /* |
| 1108 | * We allow DPO (Disable Page Out = don't save data in the |
| 1109 | * cache) but we don't implement it. |
| 1110 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1111 | if (common->cmnd[1] & ~0x10) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1112 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1113 | return -EINVAL; |
| 1114 | } |
| 1115 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1116 | verification_length = get_unaligned_be16(&common->cmnd[7]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1117 | if (unlikely(verification_length == 0)) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1118 | return -EIO; /* No default reply */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1119 | |
| 1120 | /* Prepare to carry out the file verify */ |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1121 | amount_left = verification_length << curlun->blkbits; |
| 1122 | file_offset = ((loff_t) lba) << curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1123 | |
| 1124 | /* Write out all the dirty buffers before invalidating them */ |
| 1125 | fsg_lun_fsync_sub(curlun); |
| 1126 | if (signal_pending(current)) |
| 1127 | return -EINTR; |
| 1128 | |
| 1129 | invalidate_sub(curlun); |
| 1130 | if (signal_pending(current)) |
| 1131 | return -EINTR; |
| 1132 | |
| 1133 | /* Just try to read the requested blocks */ |
| 1134 | while (amount_left > 0) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1135 | /* |
| 1136 | * Figure out how much we need to read: |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1137 | * Try to read the remaining amount, but not more than |
| 1138 | * the buffer size. |
| 1139 | * And don't try to read past the end of the file. |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1140 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1141 | amount = min(amount_left, FSG_BUFLEN); |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1142 | amount = min((loff_t)amount, |
| 1143 | curlun->file_length - file_offset); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1144 | if (amount == 0) { |
| 1145 | curlun->sense_data = |
| 1146 | SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1147 | curlun->sense_data_info = |
| 1148 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1149 | curlun->info_valid = 1; |
| 1150 | break; |
| 1151 | } |
| 1152 | |
| 1153 | /* Perform the read */ |
| 1154 | file_offset_tmp = file_offset; |
| 1155 | nread = vfs_read(curlun->filp, |
| 1156 | (char __user *) bh->buf, |
| 1157 | amount, &file_offset_tmp); |
| 1158 | VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, |
| 1159 | (unsigned long long) file_offset, |
| 1160 | (int) nread); |
| 1161 | if (signal_pending(current)) |
| 1162 | return -EINTR; |
| 1163 | |
| 1164 | if (nread < 0) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1165 | LDBG(curlun, "error in file verify: %d\n", (int)nread); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1166 | nread = 0; |
| 1167 | } else if (nread < amount) { |
| 1168 | LDBG(curlun, "partial file verify: %d/%u\n", |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1169 | (int)nread, amount); |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1170 | nread = round_down(nread, curlun->blksize); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1171 | } |
| 1172 | if (nread == 0) { |
| 1173 | curlun->sense_data = SS_UNRECOVERED_READ_ERROR; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1174 | curlun->sense_data_info = |
| 1175 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1176 | curlun->info_valid = 1; |
| 1177 | break; |
| 1178 | } |
| 1179 | file_offset += nread; |
| 1180 | amount_left -= nread; |
| 1181 | } |
| 1182 | return 0; |
| 1183 | } |
| 1184 | |
| 1185 | |
| 1186 | /*-------------------------------------------------------------------------*/ |
| 1187 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1188 | static int do_inquiry(struct fsg_common *common, struct fsg_buffhd *bh) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1189 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1190 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1191 | u8 *buf = (u8 *) bh->buf; |
| 1192 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1193 | if (!curlun) { /* Unsupported LUNs are okay */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1194 | common->bad_lun_okay = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1195 | memset(buf, 0, 36); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1196 | buf[0] = 0x7f; /* Unsupported, no device-type */ |
| 1197 | buf[4] = 31; /* Additional length */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1198 | return 36; |
| 1199 | } |
| 1200 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1201 | buf[0] = curlun->cdrom ? TYPE_ROM : TYPE_DISK; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1202 | buf[1] = curlun->removable ? 0x80 : 0; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1203 | buf[2] = 2; /* ANSI SCSI level 2 */ |
| 1204 | buf[3] = 2; /* SCSI-2 INQUIRY data format */ |
| 1205 | buf[4] = 31; /* Additional length */ |
| 1206 | buf[5] = 0; /* No special options */ |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1207 | buf[6] = 0; |
| 1208 | buf[7] = 0; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1209 | memcpy(buf + 8, common->inquiry_string, sizeof common->inquiry_string); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1210 | return 36; |
| 1211 | } |
| 1212 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1213 | static int do_request_sense(struct fsg_common *common, struct fsg_buffhd *bh) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1214 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1215 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1216 | u8 *buf = (u8 *) bh->buf; |
| 1217 | u32 sd, sdinfo; |
| 1218 | int valid; |
| 1219 | |
| 1220 | /* |
| 1221 | * From the SCSI-2 spec., section 7.9 (Unit attention condition): |
| 1222 | * |
| 1223 | * If a REQUEST SENSE command is received from an initiator |
| 1224 | * with a pending unit attention condition (before the target |
| 1225 | * generates the contingent allegiance condition), then the |
| 1226 | * target shall either: |
| 1227 | * a) report any pending sense data and preserve the unit |
| 1228 | * attention condition on the logical unit, or, |
| 1229 | * b) report the unit attention condition, may discard any |
| 1230 | * pending sense data, and clear the unit attention |
| 1231 | * condition on the logical unit for that initiator. |
| 1232 | * |
| 1233 | * FSG normally uses option a); enable this code to use option b). |
| 1234 | */ |
| 1235 | #if 0 |
| 1236 | if (curlun && curlun->unit_attention_data != SS_NO_SENSE) { |
| 1237 | curlun->sense_data = curlun->unit_attention_data; |
| 1238 | curlun->unit_attention_data = SS_NO_SENSE; |
| 1239 | } |
| 1240 | #endif |
| 1241 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1242 | if (!curlun) { /* Unsupported LUNs are okay */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1243 | common->bad_lun_okay = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1244 | sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; |
| 1245 | sdinfo = 0; |
| 1246 | valid = 0; |
| 1247 | } else { |
| 1248 | sd = curlun->sense_data; |
| 1249 | sdinfo = curlun->sense_data_info; |
| 1250 | valid = curlun->info_valid << 7; |
| 1251 | curlun->sense_data = SS_NO_SENSE; |
| 1252 | curlun->sense_data_info = 0; |
| 1253 | curlun->info_valid = 0; |
| 1254 | } |
| 1255 | |
| 1256 | memset(buf, 0, 18); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1257 | buf[0] = valid | 0x70; /* Valid, current error */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1258 | buf[2] = SK(sd); |
| 1259 | put_unaligned_be32(sdinfo, &buf[3]); /* Sense information */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1260 | buf[7] = 18 - 8; /* Additional sense length */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1261 | buf[12] = ASC(sd); |
| 1262 | buf[13] = ASCQ(sd); |
| 1263 | return 18; |
| 1264 | } |
| 1265 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1266 | static int do_read_capacity(struct fsg_common *common, struct fsg_buffhd *bh) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1267 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1268 | struct fsg_lun *curlun = common->curlun; |
| 1269 | u32 lba = get_unaligned_be32(&common->cmnd[2]); |
| 1270 | int pmi = common->cmnd[8]; |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1271 | u8 *buf = (u8 *)bh->buf; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1272 | |
| 1273 | /* Check the PMI and LBA fields */ |
| 1274 | if (pmi > 1 || (pmi == 0 && lba != 0)) { |
| 1275 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1276 | return -EINVAL; |
| 1277 | } |
| 1278 | |
| 1279 | put_unaligned_be32(curlun->num_sectors - 1, &buf[0]); |
| 1280 | /* Max logical block */ |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1281 | put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1282 | return 8; |
| 1283 | } |
| 1284 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1285 | static int do_read_header(struct fsg_common *common, struct fsg_buffhd *bh) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1286 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1287 | struct fsg_lun *curlun = common->curlun; |
| 1288 | int msf = common->cmnd[1] & 0x02; |
| 1289 | u32 lba = get_unaligned_be32(&common->cmnd[2]); |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1290 | u8 *buf = (u8 *)bh->buf; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1291 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1292 | if (common->cmnd[1] & ~0x02) { /* Mask away MSF */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1293 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1294 | return -EINVAL; |
| 1295 | } |
| 1296 | if (lba >= curlun->num_sectors) { |
| 1297 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 1298 | return -EINVAL; |
| 1299 | } |
| 1300 | |
| 1301 | memset(buf, 0, 8); |
| 1302 | buf[0] = 0x01; /* 2048 bytes of user data, rest is EC */ |
| 1303 | store_cdrom_address(&buf[4], msf, lba); |
| 1304 | return 8; |
| 1305 | } |
| 1306 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1307 | static int do_read_toc(struct fsg_common *common, struct fsg_buffhd *bh) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1308 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1309 | struct fsg_lun *curlun = common->curlun; |
| 1310 | int msf = common->cmnd[1] & 0x02; |
| 1311 | int start_track = common->cmnd[6]; |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1312 | u8 *buf = (u8 *)bh->buf; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1313 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1314 | if ((common->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1315 | start_track > 1) { |
| 1316 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1317 | return -EINVAL; |
| 1318 | } |
| 1319 | |
| 1320 | memset(buf, 0, 20); |
| 1321 | buf[1] = (20-2); /* TOC data length */ |
| 1322 | buf[2] = 1; /* First track number */ |
| 1323 | buf[3] = 1; /* Last track number */ |
| 1324 | buf[5] = 0x16; /* Data track, copying allowed */ |
| 1325 | buf[6] = 0x01; /* Only track is number 1 */ |
| 1326 | store_cdrom_address(&buf[8], msf, 0); |
| 1327 | |
| 1328 | buf[13] = 0x16; /* Lead-out track is data */ |
| 1329 | buf[14] = 0xAA; /* Lead-out track number */ |
| 1330 | store_cdrom_address(&buf[16], msf, curlun->num_sectors); |
| 1331 | return 20; |
| 1332 | } |
| 1333 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1334 | static int do_mode_sense(struct fsg_common *common, struct fsg_buffhd *bh) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1335 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1336 | struct fsg_lun *curlun = common->curlun; |
| 1337 | int mscmnd = common->cmnd[0]; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1338 | u8 *buf = (u8 *) bh->buf; |
| 1339 | u8 *buf0 = buf; |
| 1340 | int pc, page_code; |
| 1341 | int changeable_values, all_pages; |
| 1342 | int valid_page = 0; |
| 1343 | int len, limit; |
| 1344 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1345 | if ((common->cmnd[1] & ~0x08) != 0) { /* Mask away DBD */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1346 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1347 | return -EINVAL; |
| 1348 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1349 | pc = common->cmnd[2] >> 6; |
| 1350 | page_code = common->cmnd[2] & 0x3f; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1351 | if (pc == 3) { |
| 1352 | curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED; |
| 1353 | return -EINVAL; |
| 1354 | } |
| 1355 | changeable_values = (pc == 1); |
| 1356 | all_pages = (page_code == 0x3f); |
| 1357 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1358 | /* |
| 1359 | * Write the mode parameter header. Fixed values are: default |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1360 | * medium type, no cache control (DPOFUA), and no block descriptors. |
| 1361 | * The only variable value is the WriteProtect bit. We will fill in |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1362 | * the mode data length later. |
| 1363 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1364 | memset(buf, 0, 8); |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1365 | if (mscmnd == MODE_SENSE) { |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1366 | buf[2] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1367 | buf += 4; |
| 1368 | limit = 255; |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1369 | } else { /* MODE_SENSE_10 */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1370 | buf[3] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1371 | buf += 8; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1372 | limit = 65535; /* Should really be FSG_BUFLEN */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1373 | } |
| 1374 | |
| 1375 | /* No block descriptors */ |
| 1376 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1377 | /* |
| 1378 | * The mode pages, in numerical order. The only page we support |
| 1379 | * is the Caching page. |
| 1380 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1381 | if (page_code == 0x08 || all_pages) { |
| 1382 | valid_page = 1; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1383 | buf[0] = 0x08; /* Page code */ |
| 1384 | buf[1] = 10; /* Page length */ |
| 1385 | memset(buf+2, 0, 10); /* None of the fields are changeable */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1386 | |
| 1387 | if (!changeable_values) { |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1388 | buf[2] = 0x04; /* Write cache enable, */ |
| 1389 | /* Read cache not disabled */ |
| 1390 | /* No cache retention priorities */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1391 | put_unaligned_be16(0xffff, &buf[4]); |
| 1392 | /* Don't disable prefetch */ |
| 1393 | /* Minimum prefetch = 0 */ |
| 1394 | put_unaligned_be16(0xffff, &buf[8]); |
| 1395 | /* Maximum prefetch */ |
| 1396 | put_unaligned_be16(0xffff, &buf[10]); |
| 1397 | /* Maximum prefetch ceiling */ |
| 1398 | } |
| 1399 | buf += 12; |
| 1400 | } |
| 1401 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1402 | /* |
| 1403 | * Check that a valid page was requested and the mode data length |
| 1404 | * isn't too long. |
| 1405 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1406 | len = buf - buf0; |
| 1407 | if (!valid_page || len > limit) { |
| 1408 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1409 | return -EINVAL; |
| 1410 | } |
| 1411 | |
| 1412 | /* Store the mode data length */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1413 | if (mscmnd == MODE_SENSE) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1414 | buf0[0] = len - 1; |
| 1415 | else |
| 1416 | put_unaligned_be16(len - 2, buf0); |
| 1417 | return len; |
| 1418 | } |
| 1419 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1420 | static int do_start_stop(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1421 | { |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1422 | struct fsg_lun *curlun = common->curlun; |
| 1423 | int loej, start; |
| 1424 | |
| 1425 | if (!curlun) { |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1426 | return -EINVAL; |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1427 | } else if (!curlun->removable) { |
| 1428 | curlun->sense_data = SS_INVALID_COMMAND; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1429 | return -EINVAL; |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1430 | } else if ((common->cmnd[1] & ~0x01) != 0 || /* Mask away Immed */ |
| 1431 | (common->cmnd[4] & ~0x03) != 0) { /* Mask LoEj, Start */ |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1432 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1433 | return -EINVAL; |
| 1434 | } |
| 1435 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1436 | loej = common->cmnd[4] & 0x02; |
| 1437 | start = common->cmnd[4] & 0x01; |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1438 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1439 | /* |
| 1440 | * Our emulation doesn't support mounting; the medium is |
| 1441 | * available for use as soon as it is loaded. |
| 1442 | */ |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1443 | if (start) { |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1444 | if (!fsg_lun_is_open(curlun)) { |
| 1445 | curlun->sense_data = SS_MEDIUM_NOT_PRESENT; |
| 1446 | return -EINVAL; |
| 1447 | } |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1448 | return 0; |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1449 | } |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1450 | |
| 1451 | /* Are we allowed to unload the media? */ |
| 1452 | if (curlun->prevent_medium_removal) { |
| 1453 | LDBG(curlun, "unload attempt prevented\n"); |
| 1454 | curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED; |
| 1455 | return -EINVAL; |
| 1456 | } |
| 1457 | |
| 1458 | if (!loej) |
| 1459 | return 0; |
| 1460 | |
| 1461 | /* Simulate an unload/eject */ |
| 1462 | if (common->ops && common->ops->pre_eject) { |
| 1463 | int r = common->ops->pre_eject(common, curlun, |
| 1464 | curlun - common->luns); |
| 1465 | if (unlikely(r < 0)) |
| 1466 | return r; |
| 1467 | else if (r) |
| 1468 | return 0; |
| 1469 | } |
| 1470 | |
| 1471 | up_read(&common->filesem); |
| 1472 | down_write(&common->filesem); |
| 1473 | fsg_lun_close(curlun); |
| 1474 | up_write(&common->filesem); |
| 1475 | down_read(&common->filesem); |
| 1476 | |
| 1477 | return common->ops && common->ops->post_eject |
| 1478 | ? min(0, common->ops->post_eject(common, curlun, |
| 1479 | curlun - common->luns)) |
| 1480 | : 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1481 | } |
| 1482 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1483 | static int do_prevent_allow(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1484 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1485 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1486 | int prevent; |
| 1487 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1488 | if (!common->curlun) { |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1489 | return -EINVAL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1490 | } else if (!common->curlun->removable) { |
| 1491 | common->curlun->sense_data = SS_INVALID_COMMAND; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1492 | return -EINVAL; |
| 1493 | } |
| 1494 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1495 | prevent = common->cmnd[4] & 0x01; |
| 1496 | if ((common->cmnd[4] & ~0x01) != 0) { /* Mask away Prevent */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1497 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1498 | return -EINVAL; |
| 1499 | } |
| 1500 | |
| 1501 | if (curlun->prevent_medium_removal && !prevent) |
| 1502 | fsg_lun_fsync_sub(curlun); |
| 1503 | curlun->prevent_medium_removal = prevent; |
| 1504 | return 0; |
| 1505 | } |
| 1506 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1507 | static int do_read_format_capacities(struct fsg_common *common, |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1508 | struct fsg_buffhd *bh) |
| 1509 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1510 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1511 | u8 *buf = (u8 *) bh->buf; |
| 1512 | |
| 1513 | buf[0] = buf[1] = buf[2] = 0; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1514 | buf[3] = 8; /* Only the Current/Maximum Capacity Descriptor */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1515 | buf += 4; |
| 1516 | |
| 1517 | put_unaligned_be32(curlun->num_sectors, &buf[0]); |
| 1518 | /* Number of blocks */ |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1519 | put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1520 | buf[4] = 0x02; /* Current capacity */ |
| 1521 | return 12; |
| 1522 | } |
| 1523 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1524 | static int do_mode_select(struct fsg_common *common, struct fsg_buffhd *bh) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1525 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1526 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1527 | |
| 1528 | /* We don't support MODE SELECT */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1529 | if (curlun) |
| 1530 | curlun->sense_data = SS_INVALID_COMMAND; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1531 | return -EINVAL; |
| 1532 | } |
| 1533 | |
| 1534 | |
| 1535 | /*-------------------------------------------------------------------------*/ |
| 1536 | |
| 1537 | static int halt_bulk_in_endpoint(struct fsg_dev *fsg) |
| 1538 | { |
| 1539 | int rc; |
| 1540 | |
| 1541 | rc = fsg_set_halt(fsg, fsg->bulk_in); |
| 1542 | if (rc == -EAGAIN) |
| 1543 | VDBG(fsg, "delayed bulk-in endpoint halt\n"); |
| 1544 | while (rc != 0) { |
| 1545 | if (rc != -EAGAIN) { |
| 1546 | WARNING(fsg, "usb_ep_set_halt -> %d\n", rc); |
| 1547 | rc = 0; |
| 1548 | break; |
| 1549 | } |
| 1550 | |
| 1551 | /* Wait for a short time and then try again */ |
| 1552 | if (msleep_interruptible(100) != 0) |
| 1553 | return -EINTR; |
| 1554 | rc = usb_ep_set_halt(fsg->bulk_in); |
| 1555 | } |
| 1556 | return rc; |
| 1557 | } |
| 1558 | |
| 1559 | static int wedge_bulk_in_endpoint(struct fsg_dev *fsg) |
| 1560 | { |
| 1561 | int rc; |
| 1562 | |
| 1563 | DBG(fsg, "bulk-in set wedge\n"); |
| 1564 | rc = usb_ep_set_wedge(fsg->bulk_in); |
| 1565 | if (rc == -EAGAIN) |
| 1566 | VDBG(fsg, "delayed bulk-in endpoint wedge\n"); |
| 1567 | while (rc != 0) { |
| 1568 | if (rc != -EAGAIN) { |
| 1569 | WARNING(fsg, "usb_ep_set_wedge -> %d\n", rc); |
| 1570 | rc = 0; |
| 1571 | break; |
| 1572 | } |
| 1573 | |
| 1574 | /* Wait for a short time and then try again */ |
| 1575 | if (msleep_interruptible(100) != 0) |
| 1576 | return -EINTR; |
| 1577 | rc = usb_ep_set_wedge(fsg->bulk_in); |
| 1578 | } |
| 1579 | return rc; |
| 1580 | } |
| 1581 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1582 | static int throw_away_data(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1583 | { |
| 1584 | struct fsg_buffhd *bh; |
| 1585 | u32 amount; |
| 1586 | int rc; |
| 1587 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1588 | for (bh = common->next_buffhd_to_drain; |
| 1589 | bh->state != BUF_STATE_EMPTY || common->usb_amount_left > 0; |
| 1590 | bh = common->next_buffhd_to_drain) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1591 | |
| 1592 | /* Throw away the data in a filled buffer */ |
| 1593 | if (bh->state == BUF_STATE_FULL) { |
| 1594 | smp_rmb(); |
| 1595 | bh->state = BUF_STATE_EMPTY; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1596 | common->next_buffhd_to_drain = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1597 | |
| 1598 | /* A short packet or an error ends everything */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 1599 | if (bh->outreq->actual < bh->bulk_out_intended_length || |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1600 | bh->outreq->status != 0) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1601 | raise_exception(common, |
| 1602 | FSG_STATE_ABORT_BULK_OUT); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1603 | return -EINTR; |
| 1604 | } |
| 1605 | continue; |
| 1606 | } |
| 1607 | |
| 1608 | /* Try to submit another request if we need one */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1609 | bh = common->next_buffhd_to_fill; |
| 1610 | if (bh->state == BUF_STATE_EMPTY |
| 1611 | && common->usb_amount_left > 0) { |
| 1612 | amount = min(common->usb_amount_left, FSG_BUFLEN); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1613 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1614 | /* |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1615 | * Except at the end of the transfer, amount will be |
| 1616 | * equal to the buffer size, which is divisible by |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1617 | * the bulk-out maxpacket size. |
| 1618 | */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 1619 | set_bulk_out_req_length(common, bh, amount); |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 1620 | if (!start_out_transfer(common, bh)) |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1621 | /* Dunno what to do if common->fsg is NULL */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1622 | return -EIO; |
| 1623 | common->next_buffhd_to_fill = bh->next; |
| 1624 | common->usb_amount_left -= amount; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1625 | continue; |
| 1626 | } |
| 1627 | |
| 1628 | /* Otherwise wait for something to happen */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1629 | rc = sleep_thread(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1630 | if (rc) |
| 1631 | return rc; |
| 1632 | } |
| 1633 | return 0; |
| 1634 | } |
| 1635 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1636 | static int finish_reply(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1637 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1638 | struct fsg_buffhd *bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1639 | int rc = 0; |
| 1640 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1641 | switch (common->data_dir) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1642 | case DATA_DIR_NONE: |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1643 | break; /* Nothing to send */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1644 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1645 | /* |
| 1646 | * If we don't know whether the host wants to read or write, |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1647 | * this must be CB or CBI with an unknown command. We mustn't |
| 1648 | * try to send or receive any data. So stall both bulk pipes |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1649 | * if we can and wait for a reset. |
| 1650 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1651 | case DATA_DIR_UNKNOWN: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1652 | if (!common->can_stall) { |
| 1653 | /* Nothing */ |
| 1654 | } else if (fsg_is_set(common)) { |
| 1655 | fsg_set_halt(common->fsg, common->fsg->bulk_out); |
| 1656 | rc = halt_bulk_in_endpoint(common->fsg); |
| 1657 | } else { |
| 1658 | /* Don't know what to do if common->fsg is NULL */ |
| 1659 | rc = -EIO; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1660 | } |
| 1661 | break; |
| 1662 | |
| 1663 | /* All but the last buffer of data must have already been sent */ |
| 1664 | case DATA_DIR_TO_HOST: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1665 | if (common->data_size == 0) { |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1666 | /* Nothing to send */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1667 | |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 1668 | /* Don't know what to do if common->fsg is NULL */ |
| 1669 | } else if (!fsg_is_set(common)) { |
| 1670 | rc = -EIO; |
| 1671 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1672 | /* If there's no residue, simply send the last buffer */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1673 | } else if (common->residue == 0) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1674 | bh->inreq->zero = 0; |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 1675 | if (!start_in_transfer(common, bh)) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1676 | return -EIO; |
| 1677 | common->next_buffhd_to_fill = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1678 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1679 | /* |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 1680 | * For Bulk-only, mark the end of the data with a short |
| 1681 | * packet. If we are allowed to stall, halt the bulk-in |
| 1682 | * endpoint. (Note: This violates the Bulk-Only Transport |
| 1683 | * specification, which requires us to pad the data if we |
| 1684 | * don't halt the endpoint. Presumably nobody will mind.) |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1685 | */ |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 1686 | } else { |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1687 | bh->inreq->zero = 1; |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 1688 | if (!start_in_transfer(common, bh)) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1689 | rc = -EIO; |
| 1690 | common->next_buffhd_to_fill = bh->next; |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 1691 | if (common->can_stall) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1692 | rc = halt_bulk_in_endpoint(common->fsg); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1693 | } |
| 1694 | break; |
| 1695 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1696 | /* |
| 1697 | * We have processed all we want from the data the host has sent. |
| 1698 | * There may still be outstanding bulk-out requests. |
| 1699 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1700 | case DATA_DIR_FROM_HOST: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1701 | if (common->residue == 0) { |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1702 | /* Nothing to receive */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1703 | |
| 1704 | /* Did the host stop sending unexpectedly early? */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1705 | } else if (common->short_packet_received) { |
| 1706 | raise_exception(common, FSG_STATE_ABORT_BULK_OUT); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1707 | rc = -EINTR; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1708 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1709 | /* |
| 1710 | * We haven't processed all the incoming data. Even though |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1711 | * we may be allowed to stall, doing so would cause a race. |
| 1712 | * The controller may already have ACK'ed all the remaining |
| 1713 | * bulk-out packets, in which case the host wouldn't see a |
| 1714 | * STALL. Not realizing the endpoint was halted, it wouldn't |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1715 | * clear the halt -- leading to problems later on. |
| 1716 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1717 | #if 0 |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1718 | } else if (common->can_stall) { |
| 1719 | if (fsg_is_set(common)) |
| 1720 | fsg_set_halt(common->fsg, |
| 1721 | common->fsg->bulk_out); |
| 1722 | raise_exception(common, FSG_STATE_ABORT_BULK_OUT); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1723 | rc = -EINTR; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1724 | #endif |
| 1725 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1726 | /* |
| 1727 | * We can't stall. Read in the excess data and throw it |
| 1728 | * all away. |
| 1729 | */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1730 | } else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1731 | rc = throw_away_data(common); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1732 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1733 | break; |
| 1734 | } |
| 1735 | return rc; |
| 1736 | } |
| 1737 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1738 | static int send_status(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1739 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1740 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1741 | struct fsg_buffhd *bh; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1742 | struct bulk_cs_wrap *csw; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1743 | int rc; |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1744 | u8 status = US_BULK_STAT_OK; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1745 | u32 sd, sdinfo = 0; |
| 1746 | |
| 1747 | /* Wait for the next buffer to become available */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1748 | bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1749 | while (bh->state != BUF_STATE_EMPTY) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1750 | rc = sleep_thread(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1751 | if (rc) |
| 1752 | return rc; |
| 1753 | } |
| 1754 | |
| 1755 | if (curlun) { |
| 1756 | sd = curlun->sense_data; |
| 1757 | sdinfo = curlun->sense_data_info; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1758 | } else if (common->bad_lun_okay) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1759 | sd = SS_NO_SENSE; |
| 1760 | else |
| 1761 | sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; |
| 1762 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1763 | if (common->phase_error) { |
| 1764 | DBG(common, "sending phase-error status\n"); |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1765 | status = US_BULK_STAT_PHASE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1766 | sd = SS_INVALID_COMMAND; |
| 1767 | } else if (sd != SS_NO_SENSE) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1768 | DBG(common, "sending command-failure status\n"); |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1769 | status = US_BULK_STAT_FAIL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1770 | VDBG(common, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;" |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1771 | " info x%x\n", |
| 1772 | SK(sd), ASC(sd), ASCQ(sd), sdinfo); |
| 1773 | } |
| 1774 | |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1775 | /* Store and send the Bulk-only CSW */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1776 | csw = (void *)bh->buf; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1777 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1778 | csw->Signature = cpu_to_le32(US_BULK_CS_SIGN); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1779 | csw->Tag = common->tag; |
| 1780 | csw->Residue = cpu_to_le32(common->residue); |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1781 | csw->Status = status; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1782 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1783 | bh->inreq->length = US_BULK_CS_WRAP_LEN; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1784 | bh->inreq->zero = 0; |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 1785 | if (!start_in_transfer(common, bh)) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1786 | /* Don't know what to do if common->fsg is NULL */ |
| 1787 | return -EIO; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1788 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1789 | common->next_buffhd_to_fill = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1790 | return 0; |
| 1791 | } |
| 1792 | |
| 1793 | |
| 1794 | /*-------------------------------------------------------------------------*/ |
| 1795 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1796 | /* |
| 1797 | * Check whether the command is properly formed and whether its data size |
| 1798 | * and direction agree with the values we already have. |
| 1799 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1800 | static int check_command(struct fsg_common *common, int cmnd_size, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1801 | enum data_direction data_dir, unsigned int mask, |
| 1802 | int needs_medium, const char *name) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1803 | { |
| 1804 | int i; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1805 | int lun = common->cmnd[1] >> 5; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1806 | static const char dirletter[4] = {'u', 'o', 'i', 'n'}; |
| 1807 | char hdlen[20]; |
| 1808 | struct fsg_lun *curlun; |
| 1809 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1810 | hdlen[0] = 0; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1811 | if (common->data_dir != DATA_DIR_UNKNOWN) |
| 1812 | sprintf(hdlen, ", H%c=%u", dirletter[(int) common->data_dir], |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1813 | common->data_size); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1814 | VDBG(common, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n", |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1815 | name, cmnd_size, dirletter[(int) data_dir], |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1816 | common->data_size_from_cmnd, common->cmnd_size, hdlen); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1817 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1818 | /* |
| 1819 | * We can't reply at all until we know the correct data direction |
| 1820 | * and size. |
| 1821 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1822 | if (common->data_size_from_cmnd == 0) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1823 | data_dir = DATA_DIR_NONE; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1824 | if (common->data_size < common->data_size_from_cmnd) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1825 | /* |
| 1826 | * Host data size < Device data size is a phase error. |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1827 | * Carry out the command, but only transfer as much as |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1828 | * we are allowed. |
| 1829 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1830 | common->data_size_from_cmnd = common->data_size; |
| 1831 | common->phase_error = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1832 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1833 | common->residue = common->data_size; |
| 1834 | common->usb_amount_left = common->data_size; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1835 | |
| 1836 | /* Conflicting data directions is a phase error */ |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1837 | if (common->data_dir != data_dir && common->data_size_from_cmnd > 0) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1838 | common->phase_error = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1839 | return -EINVAL; |
| 1840 | } |
| 1841 | |
| 1842 | /* Verify the length of the command itself */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1843 | if (cmnd_size != common->cmnd_size) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1844 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1845 | /* |
| 1846 | * Special case workaround: There are plenty of buggy SCSI |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1847 | * implementations. Many have issues with cbw->Length |
| 1848 | * field passing a wrong command size. For those cases we |
| 1849 | * always try to work around the problem by using the length |
| 1850 | * sent by the host side provided it is at least as large |
| 1851 | * as the correct command length. |
| 1852 | * Examples of such cases would be MS-Windows, which issues |
| 1853 | * REQUEST SENSE with cbw->Length == 12 where it should |
| 1854 | * be 6, and xbox360 issuing INQUIRY, TEST UNIT READY and |
| 1855 | * REQUEST SENSE with cbw->Length == 10 where it should |
| 1856 | * be 6 as well. |
| 1857 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1858 | if (cmnd_size <= common->cmnd_size) { |
| 1859 | DBG(common, "%s is buggy! Expected length %d " |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 1860 | "but we got %d\n", name, |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1861 | cmnd_size, common->cmnd_size); |
| 1862 | cmnd_size = common->cmnd_size; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1863 | } else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1864 | common->phase_error = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1865 | return -EINVAL; |
| 1866 | } |
| 1867 | } |
| 1868 | |
| 1869 | /* Check that the LUN values are consistent */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1870 | if (common->lun != lun) |
| 1871 | DBG(common, "using LUN %d from CBW, not LUN %d from CDB\n", |
| 1872 | common->lun, lun); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1873 | |
| 1874 | /* Check the LUN */ |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 1875 | curlun = common->curlun; |
| 1876 | if (curlun) { |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1877 | if (common->cmnd[0] != REQUEST_SENSE) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1878 | curlun->sense_data = SS_NO_SENSE; |
| 1879 | curlun->sense_data_info = 0; |
| 1880 | curlun->info_valid = 0; |
| 1881 | } |
| 1882 | } else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1883 | common->bad_lun_okay = 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1884 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1885 | /* |
| 1886 | * INQUIRY and REQUEST SENSE commands are explicitly allowed |
| 1887 | * to use unsupported LUNs; all others may not. |
| 1888 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1889 | if (common->cmnd[0] != INQUIRY && |
| 1890 | common->cmnd[0] != REQUEST_SENSE) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1891 | DBG(common, "unsupported LUN %d\n", common->lun); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1892 | return -EINVAL; |
| 1893 | } |
| 1894 | } |
| 1895 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1896 | /* |
| 1897 | * If a unit attention condition exists, only INQUIRY and |
| 1898 | * REQUEST SENSE commands are allowed; anything else must fail. |
| 1899 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1900 | if (curlun && curlun->unit_attention_data != SS_NO_SENSE && |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1901 | common->cmnd[0] != INQUIRY && |
| 1902 | common->cmnd[0] != REQUEST_SENSE) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1903 | curlun->sense_data = curlun->unit_attention_data; |
| 1904 | curlun->unit_attention_data = SS_NO_SENSE; |
| 1905 | return -EINVAL; |
| 1906 | } |
| 1907 | |
| 1908 | /* Check that only command bytes listed in the mask are non-zero */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1909 | common->cmnd[1] &= 0x1f; /* Mask away the LUN */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1910 | for (i = 1; i < cmnd_size; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1911 | if (common->cmnd[i] && !(mask & (1 << i))) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1912 | if (curlun) |
| 1913 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1914 | return -EINVAL; |
| 1915 | } |
| 1916 | } |
| 1917 | |
| 1918 | /* If the medium isn't mounted and the command needs to access |
| 1919 | * it, return an error. */ |
| 1920 | if (curlun && !fsg_lun_is_open(curlun) && needs_medium) { |
| 1921 | curlun->sense_data = SS_MEDIUM_NOT_PRESENT; |
| 1922 | return -EINVAL; |
| 1923 | } |
| 1924 | |
| 1925 | return 0; |
| 1926 | } |
| 1927 | |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 1928 | /* wrapper of check_command for data size in blocks handling */ |
| 1929 | static int check_command_size_in_blocks(struct fsg_common *common, |
| 1930 | int cmnd_size, enum data_direction data_dir, |
| 1931 | unsigned int mask, int needs_medium, const char *name) |
| 1932 | { |
| 1933 | if (common->curlun) |
| 1934 | common->data_size_from_cmnd <<= common->curlun->blkbits; |
| 1935 | return check_command(common, cmnd_size, data_dir, |
| 1936 | mask, needs_medium, name); |
| 1937 | } |
| 1938 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1939 | static int do_scsi_command(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1940 | { |
| 1941 | struct fsg_buffhd *bh; |
| 1942 | int rc; |
| 1943 | int reply = -EINVAL; |
| 1944 | int i; |
| 1945 | static char unknown[16]; |
| 1946 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1947 | dump_cdb(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1948 | |
| 1949 | /* Wait for the next buffer to become available for data or status */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1950 | bh = common->next_buffhd_to_fill; |
| 1951 | common->next_buffhd_to_drain = bh; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1952 | while (bh->state != BUF_STATE_EMPTY) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1953 | rc = sleep_thread(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1954 | if (rc) |
| 1955 | return rc; |
| 1956 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1957 | common->phase_error = 0; |
| 1958 | common->short_packet_received = 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1959 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1960 | down_read(&common->filesem); /* We're using the backing file */ |
| 1961 | switch (common->cmnd[0]) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1962 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1963 | case INQUIRY: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1964 | common->data_size_from_cmnd = common->cmnd[4]; |
| 1965 | reply = check_command(common, 6, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1966 | (1<<4), 0, |
| 1967 | "INQUIRY"); |
| 1968 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1969 | reply = do_inquiry(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1970 | break; |
| 1971 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1972 | case MODE_SELECT: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1973 | common->data_size_from_cmnd = common->cmnd[4]; |
| 1974 | reply = check_command(common, 6, DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1975 | (1<<1) | (1<<4), 0, |
| 1976 | "MODE SELECT(6)"); |
| 1977 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1978 | reply = do_mode_select(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1979 | break; |
| 1980 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1981 | case MODE_SELECT_10: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1982 | common->data_size_from_cmnd = |
| 1983 | get_unaligned_be16(&common->cmnd[7]); |
| 1984 | reply = check_command(common, 10, DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1985 | (1<<1) | (3<<7), 0, |
| 1986 | "MODE SELECT(10)"); |
| 1987 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1988 | reply = do_mode_select(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1989 | break; |
| 1990 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1991 | case MODE_SENSE: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1992 | common->data_size_from_cmnd = common->cmnd[4]; |
| 1993 | reply = check_command(common, 6, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1994 | (1<<1) | (1<<2) | (1<<4), 0, |
| 1995 | "MODE SENSE(6)"); |
| 1996 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1997 | reply = do_mode_sense(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1998 | break; |
| 1999 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2000 | case MODE_SENSE_10: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2001 | common->data_size_from_cmnd = |
| 2002 | get_unaligned_be16(&common->cmnd[7]); |
| 2003 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2004 | (1<<1) | (1<<2) | (3<<7), 0, |
| 2005 | "MODE SENSE(10)"); |
| 2006 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2007 | reply = do_mode_sense(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2008 | break; |
| 2009 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2010 | case ALLOW_MEDIUM_REMOVAL: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2011 | common->data_size_from_cmnd = 0; |
| 2012 | reply = check_command(common, 6, DATA_DIR_NONE, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2013 | (1<<4), 0, |
| 2014 | "PREVENT-ALLOW MEDIUM REMOVAL"); |
| 2015 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2016 | reply = do_prevent_allow(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2017 | break; |
| 2018 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2019 | case READ_6: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2020 | i = common->cmnd[4]; |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2021 | common->data_size_from_cmnd = (i == 0) ? 256 : i; |
| 2022 | reply = check_command_size_in_blocks(common, 6, |
| 2023 | DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2024 | (7<<1) | (1<<4), 1, |
| 2025 | "READ(6)"); |
| 2026 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2027 | reply = do_read(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2028 | break; |
| 2029 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2030 | case READ_10: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2031 | common->data_size_from_cmnd = |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2032 | get_unaligned_be16(&common->cmnd[7]); |
| 2033 | reply = check_command_size_in_blocks(common, 10, |
| 2034 | DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2035 | (1<<1) | (0xf<<2) | (3<<7), 1, |
| 2036 | "READ(10)"); |
| 2037 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2038 | reply = do_read(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2039 | break; |
| 2040 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2041 | case READ_12: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2042 | common->data_size_from_cmnd = |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2043 | get_unaligned_be32(&common->cmnd[6]); |
| 2044 | reply = check_command_size_in_blocks(common, 12, |
| 2045 | DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2046 | (1<<1) | (0xf<<2) | (0xf<<6), 1, |
| 2047 | "READ(12)"); |
| 2048 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2049 | reply = do_read(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2050 | break; |
| 2051 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2052 | case READ_CAPACITY: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2053 | common->data_size_from_cmnd = 8; |
| 2054 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2055 | (0xf<<2) | (1<<8), 1, |
| 2056 | "READ CAPACITY"); |
| 2057 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2058 | reply = do_read_capacity(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2059 | break; |
| 2060 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2061 | case READ_HEADER: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2062 | if (!common->curlun || !common->curlun->cdrom) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2063 | goto unknown_cmnd; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2064 | common->data_size_from_cmnd = |
| 2065 | get_unaligned_be16(&common->cmnd[7]); |
| 2066 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2067 | (3<<7) | (0x1f<<1), 1, |
| 2068 | "READ HEADER"); |
| 2069 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2070 | reply = do_read_header(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2071 | break; |
| 2072 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2073 | case READ_TOC: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2074 | if (!common->curlun || !common->curlun->cdrom) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2075 | goto unknown_cmnd; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2076 | common->data_size_from_cmnd = |
| 2077 | get_unaligned_be16(&common->cmnd[7]); |
| 2078 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2079 | (7<<6) | (1<<1), 1, |
| 2080 | "READ TOC"); |
| 2081 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2082 | reply = do_read_toc(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2083 | break; |
| 2084 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2085 | case READ_FORMAT_CAPACITIES: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2086 | common->data_size_from_cmnd = |
| 2087 | get_unaligned_be16(&common->cmnd[7]); |
| 2088 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2089 | (3<<7), 1, |
| 2090 | "READ FORMAT CAPACITIES"); |
| 2091 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2092 | reply = do_read_format_capacities(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2093 | break; |
| 2094 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2095 | case REQUEST_SENSE: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2096 | common->data_size_from_cmnd = common->cmnd[4]; |
| 2097 | reply = check_command(common, 6, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2098 | (1<<4), 0, |
| 2099 | "REQUEST SENSE"); |
| 2100 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2101 | reply = do_request_sense(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2102 | break; |
| 2103 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2104 | case START_STOP: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2105 | common->data_size_from_cmnd = 0; |
| 2106 | reply = check_command(common, 6, DATA_DIR_NONE, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2107 | (1<<1) | (1<<4), 0, |
| 2108 | "START-STOP UNIT"); |
| 2109 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2110 | reply = do_start_stop(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2111 | break; |
| 2112 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2113 | case SYNCHRONIZE_CACHE: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2114 | common->data_size_from_cmnd = 0; |
| 2115 | reply = check_command(common, 10, DATA_DIR_NONE, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2116 | (0xf<<2) | (3<<7), 1, |
| 2117 | "SYNCHRONIZE CACHE"); |
| 2118 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2119 | reply = do_synchronize_cache(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2120 | break; |
| 2121 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2122 | case TEST_UNIT_READY: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2123 | common->data_size_from_cmnd = 0; |
| 2124 | reply = check_command(common, 6, DATA_DIR_NONE, |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2125 | 0, 1, |
| 2126 | "TEST UNIT READY"); |
| 2127 | break; |
| 2128 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2129 | /* |
| 2130 | * Although optional, this command is used by MS-Windows. We |
| 2131 | * support a minimal version: BytChk must be 0. |
| 2132 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2133 | case VERIFY: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2134 | common->data_size_from_cmnd = 0; |
| 2135 | reply = check_command(common, 10, DATA_DIR_NONE, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2136 | (1<<1) | (0xf<<2) | (3<<7), 1, |
| 2137 | "VERIFY"); |
| 2138 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2139 | reply = do_verify(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2140 | break; |
| 2141 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2142 | case WRITE_6: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2143 | i = common->cmnd[4]; |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2144 | common->data_size_from_cmnd = (i == 0) ? 256 : i; |
| 2145 | reply = check_command_size_in_blocks(common, 6, |
| 2146 | DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2147 | (7<<1) | (1<<4), 1, |
| 2148 | "WRITE(6)"); |
| 2149 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2150 | reply = do_write(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2151 | break; |
| 2152 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2153 | case WRITE_10: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2154 | common->data_size_from_cmnd = |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2155 | get_unaligned_be16(&common->cmnd[7]); |
| 2156 | reply = check_command_size_in_blocks(common, 10, |
| 2157 | DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2158 | (1<<1) | (0xf<<2) | (3<<7), 1, |
| 2159 | "WRITE(10)"); |
| 2160 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2161 | reply = do_write(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2162 | break; |
| 2163 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2164 | case WRITE_12: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2165 | common->data_size_from_cmnd = |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2166 | get_unaligned_be32(&common->cmnd[6]); |
| 2167 | reply = check_command_size_in_blocks(common, 12, |
| 2168 | DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2169 | (1<<1) | (0xf<<2) | (0xf<<6), 1, |
| 2170 | "WRITE(12)"); |
| 2171 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2172 | reply = do_write(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2173 | break; |
| 2174 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2175 | /* |
| 2176 | * Some mandatory commands that we recognize but don't implement. |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2177 | * They don't mean much in this setting. It's left as an exercise |
| 2178 | * for anyone interested to implement RESERVE and RELEASE in terms |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2179 | * of Posix locks. |
| 2180 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2181 | case FORMAT_UNIT: |
| 2182 | case RELEASE: |
| 2183 | case RESERVE: |
| 2184 | case SEND_DIAGNOSTIC: |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2185 | /* Fall through */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2186 | |
| 2187 | default: |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2188 | unknown_cmnd: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2189 | common->data_size_from_cmnd = 0; |
| 2190 | sprintf(unknown, "Unknown x%02x", common->cmnd[0]); |
| 2191 | reply = check_command(common, common->cmnd_size, |
Alan Stern | c85dcda | 2012-04-11 16:09:10 -0400 | [diff] [blame] | 2192 | DATA_DIR_UNKNOWN, ~0, 0, unknown); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2193 | if (reply == 0) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2194 | common->curlun->sense_data = SS_INVALID_COMMAND; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2195 | reply = -EINVAL; |
| 2196 | } |
| 2197 | break; |
| 2198 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2199 | up_read(&common->filesem); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2200 | |
| 2201 | if (reply == -EINTR || signal_pending(current)) |
| 2202 | return -EINTR; |
| 2203 | |
| 2204 | /* Set up the single reply buffer for finish_reply() */ |
| 2205 | if (reply == -EINVAL) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2206 | reply = 0; /* Error reply length */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2207 | if (reply >= 0 && common->data_dir == DATA_DIR_TO_HOST) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2208 | reply = min((u32)reply, common->data_size_from_cmnd); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2209 | bh->inreq->length = reply; |
| 2210 | bh->state = BUF_STATE_FULL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2211 | common->residue -= reply; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2212 | } /* Otherwise it's already set */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2213 | |
| 2214 | return 0; |
| 2215 | } |
| 2216 | |
| 2217 | |
| 2218 | /*-------------------------------------------------------------------------*/ |
| 2219 | |
| 2220 | static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 2221 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2222 | struct usb_request *req = bh->outreq; |
Sebastian Andrzej Siewior | 7ac4704 | 2012-02-25 18:28:09 +0100 | [diff] [blame] | 2223 | struct bulk_cb_wrap *cbw = req->buf; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2224 | struct fsg_common *common = fsg->common; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2225 | |
| 2226 | /* Was this a real packet? Should it be ignored? */ |
| 2227 | if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags)) |
| 2228 | return -EINVAL; |
| 2229 | |
| 2230 | /* Is the CBW valid? */ |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2231 | if (req->actual != US_BULK_CB_WRAP_LEN || |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2232 | cbw->Signature != cpu_to_le32( |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2233 | US_BULK_CB_SIGN)) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2234 | DBG(fsg, "invalid CBW: len %u sig 0x%x\n", |
| 2235 | req->actual, |
| 2236 | le32_to_cpu(cbw->Signature)); |
| 2237 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2238 | /* |
| 2239 | * The Bulk-only spec says we MUST stall the IN endpoint |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2240 | * (6.6.1), so it's unavoidable. It also says we must |
| 2241 | * retain this state until the next reset, but there's |
| 2242 | * no way to tell the controller driver it should ignore |
| 2243 | * Clear-Feature(HALT) requests. |
| 2244 | * |
| 2245 | * We aren't required to halt the OUT endpoint; instead |
| 2246 | * we can simply accept and discard any data received |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2247 | * until the next reset. |
| 2248 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2249 | wedge_bulk_in_endpoint(fsg); |
| 2250 | set_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags); |
| 2251 | return -EINVAL; |
| 2252 | } |
| 2253 | |
| 2254 | /* Is the CBW meaningful? */ |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2255 | if (cbw->Lun >= FSG_MAX_LUNS || cbw->Flags & ~US_BULK_FLAG_IN || |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2256 | cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) { |
| 2257 | DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, " |
| 2258 | "cmdlen %u\n", |
| 2259 | cbw->Lun, cbw->Flags, cbw->Length); |
| 2260 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2261 | /* |
| 2262 | * We can do anything we want here, so let's stall the |
| 2263 | * bulk pipes if we are allowed to. |
| 2264 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2265 | if (common->can_stall) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2266 | fsg_set_halt(fsg, fsg->bulk_out); |
| 2267 | halt_bulk_in_endpoint(fsg); |
| 2268 | } |
| 2269 | return -EINVAL; |
| 2270 | } |
| 2271 | |
| 2272 | /* Save the command for later */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2273 | common->cmnd_size = cbw->Length; |
| 2274 | memcpy(common->cmnd, cbw->CDB, common->cmnd_size); |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2275 | if (cbw->Flags & US_BULK_FLAG_IN) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2276 | common->data_dir = DATA_DIR_TO_HOST; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2277 | else |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2278 | common->data_dir = DATA_DIR_FROM_HOST; |
| 2279 | common->data_size = le32_to_cpu(cbw->DataTransferLength); |
| 2280 | if (common->data_size == 0) |
| 2281 | common->data_dir = DATA_DIR_NONE; |
| 2282 | common->lun = cbw->Lun; |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2283 | if (common->lun >= 0 && common->lun < common->nluns) |
| 2284 | common->curlun = &common->luns[common->lun]; |
| 2285 | else |
| 2286 | common->curlun = NULL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2287 | common->tag = cbw->Tag; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2288 | return 0; |
| 2289 | } |
| 2290 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2291 | static int get_next_command(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2292 | { |
| 2293 | struct fsg_buffhd *bh; |
| 2294 | int rc = 0; |
| 2295 | |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2296 | /* Wait for the next buffer to become available */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2297 | bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2298 | while (bh->state != BUF_STATE_EMPTY) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2299 | rc = sleep_thread(common); |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2300 | if (rc) |
| 2301 | return rc; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2302 | } |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2303 | |
| 2304 | /* Queue a request to read a Bulk-only CBW */ |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2305 | set_bulk_out_req_length(common, bh, US_BULK_CB_WRAP_LEN); |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 2306 | if (!start_out_transfer(common, bh)) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2307 | /* Don't know what to do if common->fsg is NULL */ |
| 2308 | return -EIO; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2309 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2310 | /* |
| 2311 | * We will drain the buffer in software, which means we |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2312 | * can reuse it for the next filling. No need to advance |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2313 | * next_buffhd_to_fill. |
| 2314 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2315 | |
| 2316 | /* Wait for the CBW to arrive */ |
| 2317 | while (bh->state != BUF_STATE_FULL) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2318 | rc = sleep_thread(common); |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2319 | if (rc) |
| 2320 | return rc; |
| 2321 | } |
| 2322 | smp_rmb(); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2323 | rc = fsg_is_set(common) ? received_cbw(common->fsg, bh) : -EIO; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2324 | bh->state = BUF_STATE_EMPTY; |
| 2325 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2326 | return rc; |
| 2327 | } |
| 2328 | |
| 2329 | |
| 2330 | /*-------------------------------------------------------------------------*/ |
| 2331 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2332 | static int alloc_request(struct fsg_common *common, struct usb_ep *ep, |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2333 | struct usb_request **preq) |
| 2334 | { |
| 2335 | *preq = usb_ep_alloc_request(ep, GFP_ATOMIC); |
| 2336 | if (*preq) |
| 2337 | return 0; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2338 | ERROR(common, "can't allocate request for %s\n", ep->name); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2339 | return -ENOMEM; |
| 2340 | } |
| 2341 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2342 | /* Reset interface setting and re-init endpoint state (toggle etc). */ |
| 2343 | static int do_set_interface(struct fsg_common *common, struct fsg_dev *new_fsg) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2344 | { |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2345 | struct fsg_dev *fsg; |
| 2346 | int i, rc = 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2347 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2348 | if (common->running) |
| 2349 | DBG(common, "reset interface\n"); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2350 | |
| 2351 | reset: |
| 2352 | /* Deallocate the requests */ |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2353 | if (common->fsg) { |
| 2354 | fsg = common->fsg; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2355 | |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2356 | for (i = 0; i < fsg_num_buffers; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2357 | struct fsg_buffhd *bh = &common->buffhds[i]; |
| 2358 | |
| 2359 | if (bh->inreq) { |
| 2360 | usb_ep_free_request(fsg->bulk_in, bh->inreq); |
| 2361 | bh->inreq = NULL; |
| 2362 | } |
| 2363 | if (bh->outreq) { |
| 2364 | usb_ep_free_request(fsg->bulk_out, bh->outreq); |
| 2365 | bh->outreq = NULL; |
| 2366 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2367 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2368 | |
| 2369 | /* Disable the endpoints */ |
| 2370 | if (fsg->bulk_in_enabled) { |
| 2371 | usb_ep_disable(fsg->bulk_in); |
| 2372 | fsg->bulk_in_enabled = 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2373 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2374 | if (fsg->bulk_out_enabled) { |
| 2375 | usb_ep_disable(fsg->bulk_out); |
| 2376 | fsg->bulk_out_enabled = 0; |
| 2377 | } |
| 2378 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2379 | common->fsg = NULL; |
| 2380 | wake_up(&common->fsg_wait); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2381 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2382 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2383 | common->running = 0; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2384 | if (!new_fsg || rc) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2385 | return rc; |
| 2386 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2387 | common->fsg = new_fsg; |
| 2388 | fsg = common->fsg; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2389 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2390 | /* Enable the endpoints */ |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame] | 2391 | rc = config_ep_by_speed(common->gadget, &(fsg->function), fsg->bulk_in); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2392 | if (rc) |
| 2393 | goto reset; |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame] | 2394 | rc = usb_ep_enable(fsg->bulk_in); |
| 2395 | if (rc) |
| 2396 | goto reset; |
| 2397 | fsg->bulk_in->driver_data = common; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2398 | fsg->bulk_in_enabled = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2399 | |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame] | 2400 | rc = config_ep_by_speed(common->gadget, &(fsg->function), |
| 2401 | fsg->bulk_out); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2402 | if (rc) |
| 2403 | goto reset; |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame] | 2404 | rc = usb_ep_enable(fsg->bulk_out); |
| 2405 | if (rc) |
| 2406 | goto reset; |
| 2407 | fsg->bulk_out->driver_data = common; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2408 | fsg->bulk_out_enabled = 1; |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 2409 | common->bulk_out_maxpacket = usb_endpoint_maxp(fsg->bulk_out->desc); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2410 | clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags); |
| 2411 | |
| 2412 | /* Allocate the requests */ |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2413 | for (i = 0; i < fsg_num_buffers; ++i) { |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2414 | struct fsg_buffhd *bh = &common->buffhds[i]; |
| 2415 | |
| 2416 | rc = alloc_request(common, fsg->bulk_in, &bh->inreq); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2417 | if (rc) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2418 | goto reset; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2419 | rc = alloc_request(common, fsg->bulk_out, &bh->outreq); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2420 | if (rc) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2421 | goto reset; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2422 | bh->inreq->buf = bh->outreq->buf = bh->buf; |
| 2423 | bh->inreq->context = bh->outreq->context = bh; |
| 2424 | bh->inreq->complete = bulk_in_complete; |
| 2425 | bh->outreq->complete = bulk_out_complete; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2426 | } |
| 2427 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2428 | common->running = 1; |
| 2429 | for (i = 0; i < common->nluns; ++i) |
| 2430 | common->luns[i].unit_attention_data = SS_RESET_OCCURRED; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2431 | return rc; |
| 2432 | } |
| 2433 | |
| 2434 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2435 | /****************************** ALT CONFIGS ******************************/ |
| 2436 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2437 | static int fsg_set_alt(struct usb_function *f, unsigned intf, unsigned alt) |
| 2438 | { |
| 2439 | struct fsg_dev *fsg = fsg_from_func(f); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2440 | fsg->common->new_fsg = fsg; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2441 | raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE); |
Roger Quadros | 95ed323 | 2011-05-09 13:08:07 +0300 | [diff] [blame] | 2442 | return USB_GADGET_DELAYED_STATUS; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2443 | } |
| 2444 | |
| 2445 | static void fsg_disable(struct usb_function *f) |
| 2446 | { |
| 2447 | struct fsg_dev *fsg = fsg_from_func(f); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2448 | fsg->common->new_fsg = NULL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2449 | raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE); |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2450 | } |
| 2451 | |
| 2452 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2453 | /*-------------------------------------------------------------------------*/ |
| 2454 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2455 | static void handle_exception(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2456 | { |
| 2457 | siginfo_t info; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2458 | int i; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2459 | struct fsg_buffhd *bh; |
| 2460 | enum fsg_state old_state; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2461 | struct fsg_lun *curlun; |
| 2462 | unsigned int exception_req_tag; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2463 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2464 | /* |
| 2465 | * Clear the existing signals. Anything but SIGUSR1 is converted |
| 2466 | * into a high-priority EXIT exception. |
| 2467 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2468 | for (;;) { |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2469 | int sig = |
| 2470 | dequeue_signal_lock(current, ¤t->blocked, &info); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2471 | if (!sig) |
| 2472 | break; |
| 2473 | if (sig != SIGUSR1) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2474 | if (common->state < FSG_STATE_EXIT) |
| 2475 | DBG(common, "Main thread exiting on signal\n"); |
| 2476 | raise_exception(common, FSG_STATE_EXIT); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2477 | } |
| 2478 | } |
| 2479 | |
| 2480 | /* Cancel all the pending transfers */ |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2481 | if (likely(common->fsg)) { |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2482 | for (i = 0; i < fsg_num_buffers; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2483 | bh = &common->buffhds[i]; |
| 2484 | if (bh->inreq_busy) |
| 2485 | usb_ep_dequeue(common->fsg->bulk_in, bh->inreq); |
| 2486 | if (bh->outreq_busy) |
| 2487 | usb_ep_dequeue(common->fsg->bulk_out, |
| 2488 | bh->outreq); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2489 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2490 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2491 | /* Wait until everything is idle */ |
| 2492 | for (;;) { |
| 2493 | int num_active = 0; |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2494 | for (i = 0; i < fsg_num_buffers; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2495 | bh = &common->buffhds[i]; |
| 2496 | num_active += bh->inreq_busy + bh->outreq_busy; |
| 2497 | } |
| 2498 | if (num_active == 0) |
| 2499 | break; |
| 2500 | if (sleep_thread(common)) |
| 2501 | return; |
| 2502 | } |
| 2503 | |
| 2504 | /* Clear out the controller's fifos */ |
| 2505 | if (common->fsg->bulk_in_enabled) |
| 2506 | usb_ep_fifo_flush(common->fsg->bulk_in); |
| 2507 | if (common->fsg->bulk_out_enabled) |
| 2508 | usb_ep_fifo_flush(common->fsg->bulk_out); |
| 2509 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2510 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2511 | /* |
| 2512 | * Reset the I/O buffer states and pointers, the SCSI |
| 2513 | * state, and the exception. Then invoke the handler. |
| 2514 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2515 | spin_lock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2516 | |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2517 | for (i = 0; i < fsg_num_buffers; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2518 | bh = &common->buffhds[i]; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2519 | bh->state = BUF_STATE_EMPTY; |
| 2520 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2521 | common->next_buffhd_to_fill = &common->buffhds[0]; |
| 2522 | common->next_buffhd_to_drain = &common->buffhds[0]; |
| 2523 | exception_req_tag = common->exception_req_tag; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2524 | old_state = common->state; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2525 | |
| 2526 | if (old_state == FSG_STATE_ABORT_BULK_OUT) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2527 | common->state = FSG_STATE_STATUS_PHASE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2528 | else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2529 | for (i = 0; i < common->nluns; ++i) { |
| 2530 | curlun = &common->luns[i]; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2531 | curlun->prevent_medium_removal = 0; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2532 | curlun->sense_data = SS_NO_SENSE; |
| 2533 | curlun->unit_attention_data = SS_NO_SENSE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2534 | curlun->sense_data_info = 0; |
| 2535 | curlun->info_valid = 0; |
| 2536 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2537 | common->state = FSG_STATE_IDLE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2538 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2539 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2540 | |
| 2541 | /* Carry out any extra actions required for the exception */ |
| 2542 | switch (old_state) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2543 | case FSG_STATE_ABORT_BULK_OUT: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2544 | send_status(common); |
| 2545 | spin_lock_irq(&common->lock); |
| 2546 | if (common->state == FSG_STATE_STATUS_PHASE) |
| 2547 | common->state = FSG_STATE_IDLE; |
| 2548 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2549 | break; |
| 2550 | |
| 2551 | case FSG_STATE_RESET: |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2552 | /* |
| 2553 | * In case we were forced against our will to halt a |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2554 | * bulk endpoint, clear the halt now. (The SuperH UDC |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2555 | * requires this.) |
| 2556 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2557 | if (!fsg_is_set(common)) |
| 2558 | break; |
| 2559 | if (test_and_clear_bit(IGNORE_BULK_OUT, |
| 2560 | &common->fsg->atomic_bitflags)) |
| 2561 | usb_ep_clear_halt(common->fsg->bulk_in); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2562 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2563 | if (common->ep0_req_tag == exception_req_tag) |
| 2564 | ep0_queue(common); /* Complete the status stage */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2565 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2566 | /* |
| 2567 | * Technically this should go here, but it would only be |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2568 | * a waste of time. Ditto for the INTERFACE_CHANGE and |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2569 | * CONFIG_CHANGE cases. |
| 2570 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2571 | /* for (i = 0; i < common->nluns; ++i) */ |
| 2572 | /* common->luns[i].unit_attention_data = */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2573 | /* SS_RESET_OCCURRED; */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2574 | break; |
| 2575 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2576 | case FSG_STATE_CONFIG_CHANGE: |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2577 | do_set_interface(common, common->new_fsg); |
Roger Quadros | 95ed323 | 2011-05-09 13:08:07 +0300 | [diff] [blame] | 2578 | if (common->new_fsg) |
| 2579 | usb_composite_setup_continue(common->cdev); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2580 | break; |
| 2581 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2582 | case FSG_STATE_EXIT: |
| 2583 | case FSG_STATE_TERMINATED: |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2584 | do_set_interface(common, NULL); /* Free resources */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2585 | spin_lock_irq(&common->lock); |
| 2586 | common->state = FSG_STATE_TERMINATED; /* Stop the thread */ |
| 2587 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2588 | break; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2589 | |
| 2590 | case FSG_STATE_INTERFACE_CHANGE: |
| 2591 | case FSG_STATE_DISCONNECT: |
| 2592 | case FSG_STATE_COMMAND_PHASE: |
| 2593 | case FSG_STATE_DATA_PHASE: |
| 2594 | case FSG_STATE_STATUS_PHASE: |
| 2595 | case FSG_STATE_IDLE: |
| 2596 | break; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2597 | } |
| 2598 | } |
| 2599 | |
| 2600 | |
| 2601 | /*-------------------------------------------------------------------------*/ |
| 2602 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2603 | static int fsg_main_thread(void *common_) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2604 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2605 | struct fsg_common *common = common_; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2606 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2607 | /* |
| 2608 | * Allow the thread to be killed by a signal, but set the signal mask |
| 2609 | * to block everything but INT, TERM, KILL, and USR1. |
| 2610 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2611 | allow_signal(SIGINT); |
| 2612 | allow_signal(SIGTERM); |
| 2613 | allow_signal(SIGKILL); |
| 2614 | allow_signal(SIGUSR1); |
| 2615 | |
| 2616 | /* Allow the thread to be frozen */ |
| 2617 | set_freezable(); |
| 2618 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2619 | /* |
| 2620 | * Arrange for userspace references to be interpreted as kernel |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2621 | * pointers. That way we can pass a kernel pointer to a routine |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2622 | * that expects a __user pointer and it will work okay. |
| 2623 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2624 | set_fs(get_ds()); |
| 2625 | |
| 2626 | /* The main loop */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2627 | while (common->state != FSG_STATE_TERMINATED) { |
| 2628 | if (exception_in_progress(common) || signal_pending(current)) { |
| 2629 | handle_exception(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2630 | continue; |
| 2631 | } |
| 2632 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2633 | if (!common->running) { |
| 2634 | sleep_thread(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2635 | continue; |
| 2636 | } |
| 2637 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2638 | if (get_next_command(common)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2639 | continue; |
| 2640 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2641 | spin_lock_irq(&common->lock); |
| 2642 | if (!exception_in_progress(common)) |
| 2643 | common->state = FSG_STATE_DATA_PHASE; |
| 2644 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2645 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2646 | if (do_scsi_command(common) || finish_reply(common)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2647 | continue; |
| 2648 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2649 | spin_lock_irq(&common->lock); |
| 2650 | if (!exception_in_progress(common)) |
| 2651 | common->state = FSG_STATE_STATUS_PHASE; |
| 2652 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2653 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2654 | if (send_status(common)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2655 | continue; |
| 2656 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2657 | spin_lock_irq(&common->lock); |
| 2658 | if (!exception_in_progress(common)) |
| 2659 | common->state = FSG_STATE_IDLE; |
| 2660 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2661 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2662 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2663 | spin_lock_irq(&common->lock); |
| 2664 | common->thread_task = NULL; |
| 2665 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2666 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 2667 | if (!common->ops || !common->ops->thread_exits |
| 2668 | || common->ops->thread_exits(common) < 0) { |
Michal Nazarewicz | 7f1ee82 | 2010-01-28 13:05:26 +0100 | [diff] [blame] | 2669 | struct fsg_lun *curlun = common->luns; |
| 2670 | unsigned i = common->nluns; |
| 2671 | |
| 2672 | down_write(&common->filesem); |
| 2673 | for (; i--; ++curlun) { |
| 2674 | if (!fsg_lun_is_open(curlun)) |
| 2675 | continue; |
| 2676 | |
| 2677 | fsg_lun_close(curlun); |
| 2678 | curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT; |
| 2679 | } |
| 2680 | up_write(&common->filesem); |
| 2681 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2682 | |
Michal Nazarewicz | 00cb636 | 2010-10-28 17:31:22 +0200 | [diff] [blame] | 2683 | /* Let fsg_unbind() know the thread has exited */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2684 | complete_and_exit(&common->thread_notifier, 0); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2685 | } |
| 2686 | |
| 2687 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2688 | /*************************** DEVICE ATTRIBUTES ***************************/ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2689 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2690 | /* Write permission is checked per LUN in store_*() functions. */ |
| 2691 | static DEVICE_ATTR(ro, 0644, fsg_show_ro, fsg_store_ro); |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 2692 | static DEVICE_ATTR(nofua, 0644, fsg_show_nofua, fsg_store_nofua); |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2693 | static DEVICE_ATTR(file, 0644, fsg_show_file, fsg_store_file); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2694 | |
| 2695 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2696 | /****************************** FSG COMMON ******************************/ |
| 2697 | |
| 2698 | static void fsg_common_release(struct kref *ref); |
| 2699 | |
| 2700 | static void fsg_lun_release(struct device *dev) |
| 2701 | { |
| 2702 | /* Nothing needs to be done */ |
| 2703 | } |
| 2704 | |
| 2705 | static inline void fsg_common_get(struct fsg_common *common) |
| 2706 | { |
| 2707 | kref_get(&common->ref); |
| 2708 | } |
| 2709 | |
| 2710 | static inline void fsg_common_put(struct fsg_common *common) |
| 2711 | { |
| 2712 | kref_put(&common->ref, fsg_common_release); |
| 2713 | } |
| 2714 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2715 | static struct fsg_common *fsg_common_init(struct fsg_common *common, |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2716 | struct usb_composite_dev *cdev, |
| 2717 | struct fsg_config *cfg) |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2718 | { |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2719 | struct usb_gadget *gadget = cdev->gadget; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2720 | struct fsg_buffhd *bh; |
| 2721 | struct fsg_lun *curlun; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2722 | struct fsg_lun_config *lcfg; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2723 | int nluns, i, rc; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2724 | char *pathbuf; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2725 | |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2726 | rc = fsg_num_buffers_validate(); |
| 2727 | if (rc != 0) |
| 2728 | return ERR_PTR(rc); |
| 2729 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2730 | /* Find out how many LUNs there should be */ |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2731 | nluns = cfg->nluns; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2732 | if (nluns < 1 || nluns > FSG_MAX_LUNS) { |
| 2733 | dev_err(&gadget->dev, "invalid number of LUNs: %u\n", nluns); |
| 2734 | return ERR_PTR(-EINVAL); |
| 2735 | } |
| 2736 | |
| 2737 | /* Allocate? */ |
| 2738 | if (!common) { |
| 2739 | common = kzalloc(sizeof *common, GFP_KERNEL); |
| 2740 | if (!common) |
| 2741 | return ERR_PTR(-ENOMEM); |
| 2742 | common->free_storage_on_release = 1; |
| 2743 | } else { |
Jesper Juhl | a283c03 | 2011-01-29 02:26:51 +0100 | [diff] [blame] | 2744 | memset(common, 0, sizeof *common); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2745 | common->free_storage_on_release = 0; |
| 2746 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2747 | |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2748 | common->buffhds = kcalloc(fsg_num_buffers, |
| 2749 | sizeof *(common->buffhds), GFP_KERNEL); |
| 2750 | if (!common->buffhds) { |
| 2751 | if (common->free_storage_on_release) |
| 2752 | kfree(common); |
| 2753 | return ERR_PTR(-ENOMEM); |
| 2754 | } |
| 2755 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 2756 | common->ops = cfg->ops; |
Michal Nazarewicz | c85efcb | 2009-11-09 14:15:26 +0100 | [diff] [blame] | 2757 | common->private_data = cfg->private_data; |
| 2758 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2759 | common->gadget = gadget; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2760 | common->ep0 = gadget->ep0; |
| 2761 | common->ep0req = cdev->req; |
Roger Quadros | 95ed323 | 2011-05-09 13:08:07 +0300 | [diff] [blame] | 2762 | common->cdev = cdev; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2763 | |
| 2764 | /* Maybe allocate device-global string IDs, and patch descriptors */ |
| 2765 | if (fsg_strings[FSG_STRING_INTERFACE].id == 0) { |
| 2766 | rc = usb_string_id(cdev); |
Michal Nazarewicz | b9e0008 | 2010-05-12 12:51:13 +0200 | [diff] [blame] | 2767 | if (unlikely(rc < 0)) |
| 2768 | goto error_release; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2769 | fsg_strings[FSG_STRING_INTERFACE].id = rc; |
| 2770 | fsg_intf_desc.iInterface = rc; |
| 2771 | } |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2772 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2773 | /* |
| 2774 | * Create the LUNs, open their backing files, and register the |
| 2775 | * LUN devices in sysfs. |
| 2776 | */ |
Thomas Meyer | 9823a52 | 2011-11-29 22:08:00 +0100 | [diff] [blame] | 2777 | curlun = kcalloc(nluns, sizeof(*curlun), GFP_KERNEL); |
Michal Nazarewicz | b9e0008 | 2010-05-12 12:51:13 +0200 | [diff] [blame] | 2778 | if (unlikely(!curlun)) { |
| 2779 | rc = -ENOMEM; |
| 2780 | goto error_release; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2781 | } |
| 2782 | common->luns = curlun; |
| 2783 | |
| 2784 | init_rwsem(&common->filesem); |
| 2785 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2786 | for (i = 0, lcfg = cfg->luns; i < nluns; ++i, ++curlun, ++lcfg) { |
| 2787 | curlun->cdrom = !!lcfg->cdrom; |
| 2788 | curlun->ro = lcfg->cdrom || lcfg->ro; |
Roger Quadros | 3c624d4 | 2011-04-05 18:36:39 +0300 | [diff] [blame] | 2789 | curlun->initially_ro = curlun->ro; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2790 | curlun->removable = lcfg->removable; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2791 | curlun->dev.release = fsg_lun_release; |
| 2792 | curlun->dev.parent = &gadget->dev; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2793 | /* curlun->dev.driver = &fsg_driver.driver; XXX */ |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2794 | dev_set_drvdata(&curlun->dev, &common->filesem); |
Michal Nazarewicz | e8b6f8c | 2009-11-09 14:15:22 +0100 | [diff] [blame] | 2795 | dev_set_name(&curlun->dev, |
| 2796 | cfg->lun_name_format |
| 2797 | ? cfg->lun_name_format |
| 2798 | : "lun%d", |
| 2799 | i); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2800 | |
| 2801 | rc = device_register(&curlun->dev); |
| 2802 | if (rc) { |
| 2803 | INFO(common, "failed to register LUN%d: %d\n", i, rc); |
| 2804 | common->nluns = i; |
Rahul Ruikar | 17a9361 | 2010-10-28 17:31:19 +0200 | [diff] [blame] | 2805 | put_device(&curlun->dev); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2806 | goto error_release; |
| 2807 | } |
| 2808 | |
| 2809 | rc = device_create_file(&curlun->dev, &dev_attr_ro); |
| 2810 | if (rc) |
| 2811 | goto error_luns; |
| 2812 | rc = device_create_file(&curlun->dev, &dev_attr_file); |
| 2813 | if (rc) |
| 2814 | goto error_luns; |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 2815 | rc = device_create_file(&curlun->dev, &dev_attr_nofua); |
| 2816 | if (rc) |
| 2817 | goto error_luns; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2818 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2819 | if (lcfg->filename) { |
| 2820 | rc = fsg_lun_open(curlun, lcfg->filename); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2821 | if (rc) |
| 2822 | goto error_luns; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2823 | } else if (!curlun->removable) { |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2824 | ERROR(common, "no file given for LUN%d\n", i); |
| 2825 | rc = -EINVAL; |
| 2826 | goto error_luns; |
| 2827 | } |
| 2828 | } |
| 2829 | common->nluns = nluns; |
| 2830 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2831 | /* Data buffers cyclic list */ |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2832 | bh = common->buffhds; |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2833 | i = fsg_num_buffers; |
Michal Nazarewicz | aae86e8 | 2010-03-15 21:38:31 +0100 | [diff] [blame] | 2834 | goto buffhds_first_it; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2835 | do { |
| 2836 | bh->next = bh + 1; |
Michal Nazarewicz | aae86e8 | 2010-03-15 21:38:31 +0100 | [diff] [blame] | 2837 | ++bh; |
| 2838 | buffhds_first_it: |
| 2839 | bh->buf = kmalloc(FSG_BUFLEN, GFP_KERNEL); |
| 2840 | if (unlikely(!bh->buf)) { |
| 2841 | rc = -ENOMEM; |
| 2842 | goto error_release; |
| 2843 | } |
| 2844 | } while (--i); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2845 | bh->next = common->buffhds; |
| 2846 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2847 | /* Prepare inquiryString */ |
| 2848 | if (cfg->release != 0xffff) { |
| 2849 | i = cfg->release; |
| 2850 | } else { |
Christoph Egger | 90f7976 | 2010-02-05 13:24:12 +0100 | [diff] [blame] | 2851 | i = usb_gadget_controller_number(gadget); |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2852 | if (i >= 0) { |
| 2853 | i = 0x0300 + i; |
| 2854 | } else { |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2855 | WARNING(common, "controller '%s' not recognized\n", |
| 2856 | gadget->name); |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2857 | i = 0x0399; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2858 | } |
| 2859 | } |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2860 | snprintf(common->inquiry_string, sizeof common->inquiry_string, |
Michal Nazarewicz | 1ccd792 | 2010-10-28 17:31:20 +0200 | [diff] [blame] | 2861 | "%-8s%-16s%04x", cfg->vendor_name ?: "Linux", |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2862 | /* Assume product name dependent on the first LUN */ |
Michal Nazarewicz | 1ccd792 | 2010-10-28 17:31:20 +0200 | [diff] [blame] | 2863 | cfg->product_name ?: (common->luns->cdrom |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2864 | ? "File-Stor Gadget" |
Michal Nazarewicz | 1ccd792 | 2010-10-28 17:31:20 +0200 | [diff] [blame] | 2865 | : "File-CD Gadget"), |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2866 | i); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2867 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2868 | /* |
| 2869 | * Some peripheral controllers are known not to be able to |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2870 | * halt bulk endpoints correctly. If one of them is present, |
| 2871 | * disable stalls. |
| 2872 | */ |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 2873 | common->can_stall = cfg->can_stall && |
Christoph Egger | 90f7976 | 2010-02-05 13:24:12 +0100 | [diff] [blame] | 2874 | !(gadget_is_at91(common->gadget)); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2875 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2876 | spin_lock_init(&common->lock); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2877 | kref_init(&common->ref); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2878 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2879 | /* Tell the thread to start working */ |
| 2880 | common->thread_task = |
| 2881 | kthread_create(fsg_main_thread, common, |
Michal Nazarewicz | 1ccd792 | 2010-10-28 17:31:20 +0200 | [diff] [blame] | 2882 | cfg->thread_name ?: "file-storage"); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2883 | if (IS_ERR(common->thread_task)) { |
| 2884 | rc = PTR_ERR(common->thread_task); |
| 2885 | goto error_release; |
| 2886 | } |
| 2887 | init_completion(&common->thread_notifier); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2888 | init_waitqueue_head(&common->fsg_wait); |
Michal Nazarewicz | e8b6f8c | 2009-11-09 14:15:22 +0100 | [diff] [blame] | 2889 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2890 | /* Information */ |
| 2891 | INFO(common, FSG_DRIVER_DESC ", version: " FSG_DRIVER_VERSION "\n"); |
| 2892 | INFO(common, "Number of LUNs=%d\n", common->nluns); |
| 2893 | |
| 2894 | pathbuf = kmalloc(PATH_MAX, GFP_KERNEL); |
| 2895 | for (i = 0, nluns = common->nluns, curlun = common->luns; |
| 2896 | i < nluns; |
| 2897 | ++curlun, ++i) { |
| 2898 | char *p = "(no medium)"; |
| 2899 | if (fsg_lun_is_open(curlun)) { |
| 2900 | p = "(error)"; |
| 2901 | if (pathbuf) { |
| 2902 | p = d_path(&curlun->filp->f_path, |
| 2903 | pathbuf, PATH_MAX); |
| 2904 | if (IS_ERR(p)) |
| 2905 | p = "(error)"; |
| 2906 | } |
| 2907 | } |
| 2908 | LINFO(curlun, "LUN: %s%s%sfile: %s\n", |
| 2909 | curlun->removable ? "removable " : "", |
| 2910 | curlun->ro ? "read only " : "", |
| 2911 | curlun->cdrom ? "CD-ROM " : "", |
| 2912 | p); |
| 2913 | } |
| 2914 | kfree(pathbuf); |
| 2915 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2916 | DBG(common, "I/O thread pid: %d\n", task_pid_nr(common->thread_task)); |
| 2917 | |
| 2918 | wake_up_process(common->thread_task); |
| 2919 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2920 | return common; |
| 2921 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2922 | error_luns: |
| 2923 | common->nluns = i + 1; |
| 2924 | error_release: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2925 | common->state = FSG_STATE_TERMINATED; /* The thread is dead */ |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2926 | /* Call fsg_common_release() directly, ref might be not initialised. */ |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2927 | fsg_common_release(&common->ref); |
| 2928 | return ERR_PTR(rc); |
| 2929 | } |
| 2930 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2931 | static void fsg_common_release(struct kref *ref) |
| 2932 | { |
Michal Nazarewicz | b9e0008 | 2010-05-12 12:51:13 +0200 | [diff] [blame] | 2933 | struct fsg_common *common = container_of(ref, struct fsg_common, ref); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2934 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2935 | /* If the thread isn't already dead, tell it to exit now */ |
| 2936 | if (common->state != FSG_STATE_TERMINATED) { |
| 2937 | raise_exception(common, FSG_STATE_EXIT); |
| 2938 | wait_for_completion(&common->thread_notifier); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2939 | } |
| 2940 | |
Michal Nazarewicz | b9e0008 | 2010-05-12 12:51:13 +0200 | [diff] [blame] | 2941 | if (likely(common->luns)) { |
| 2942 | struct fsg_lun *lun = common->luns; |
| 2943 | unsigned i = common->nluns; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2944 | |
Michal Nazarewicz | b9e0008 | 2010-05-12 12:51:13 +0200 | [diff] [blame] | 2945 | /* In error recovery common->nluns may be zero. */ |
| 2946 | for (; i; --i, ++lun) { |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 2947 | device_remove_file(&lun->dev, &dev_attr_nofua); |
Michal Nazarewicz | b9e0008 | 2010-05-12 12:51:13 +0200 | [diff] [blame] | 2948 | device_remove_file(&lun->dev, &dev_attr_ro); |
| 2949 | device_remove_file(&lun->dev, &dev_attr_file); |
| 2950 | fsg_lun_close(lun); |
| 2951 | device_unregister(&lun->dev); |
| 2952 | } |
| 2953 | |
| 2954 | kfree(common->luns); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2955 | } |
| 2956 | |
Michal Nazarewicz | b9e0008 | 2010-05-12 12:51:13 +0200 | [diff] [blame] | 2957 | { |
| 2958 | struct fsg_buffhd *bh = common->buffhds; |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2959 | unsigned i = fsg_num_buffers; |
Michal Nazarewicz | b9e0008 | 2010-05-12 12:51:13 +0200 | [diff] [blame] | 2960 | do { |
| 2961 | kfree(bh->buf); |
| 2962 | } while (++bh, --i); |
| 2963 | } |
Michal Nazarewicz | aae86e8 | 2010-03-15 21:38:31 +0100 | [diff] [blame] | 2964 | |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2965 | kfree(common->buffhds); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2966 | if (common->free_storage_on_release) |
| 2967 | kfree(common); |
| 2968 | } |
| 2969 | |
| 2970 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2971 | /*-------------------------------------------------------------------------*/ |
| 2972 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2973 | static void fsg_unbind(struct usb_configuration *c, struct usb_function *f) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2974 | { |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2975 | struct fsg_dev *fsg = fsg_from_func(f); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2976 | struct fsg_common *common = fsg->common; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2977 | |
| 2978 | DBG(fsg, "unbind\n"); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2979 | if (fsg->common->fsg == fsg) { |
| 2980 | fsg->common->new_fsg = NULL; |
| 2981 | raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE); |
| 2982 | /* FIXME: make interruptible or killable somehow? */ |
| 2983 | wait_event(common->fsg_wait, common->fsg != fsg); |
| 2984 | } |
| 2985 | |
| 2986 | fsg_common_put(common); |
Michal Nazarewicz | 0fb2c2a | 2010-03-29 14:01:32 +0200 | [diff] [blame] | 2987 | usb_free_descriptors(fsg->function.descriptors); |
| 2988 | usb_free_descriptors(fsg->function.hs_descriptors); |
Yu Xu | f44b915 | 2011-12-10 00:03:33 +0800 | [diff] [blame] | 2989 | usb_free_descriptors(fsg->function.ss_descriptors); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2990 | kfree(fsg); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2991 | } |
| 2992 | |
Michal Nazarewicz | 28824b1 | 2010-05-05 12:53:13 +0200 | [diff] [blame] | 2993 | static int fsg_bind(struct usb_configuration *c, struct usb_function *f) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2994 | { |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2995 | struct fsg_dev *fsg = fsg_from_func(f); |
| 2996 | struct usb_gadget *gadget = c->cdev->gadget; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2997 | int i; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2998 | struct usb_ep *ep; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2999 | |
| 3000 | fsg->gadget = gadget; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3001 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3002 | /* New interface */ |
| 3003 | i = usb_interface_id(c, f); |
| 3004 | if (i < 0) |
| 3005 | return i; |
| 3006 | fsg_intf_desc.bInterfaceNumber = i; |
| 3007 | fsg->interface_number = i; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3008 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3009 | /* Find all the endpoints we will use */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3010 | ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc); |
| 3011 | if (!ep) |
| 3012 | goto autoconf_fail; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 3013 | ep->driver_data = fsg->common; /* claim the endpoint */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3014 | fsg->bulk_in = ep; |
| 3015 | |
| 3016 | ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc); |
| 3017 | if (!ep) |
| 3018 | goto autoconf_fail; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 3019 | ep->driver_data = fsg->common; /* claim the endpoint */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3020 | fsg->bulk_out = ep; |
| 3021 | |
Michal Nazarewicz | e5fd39d | 2010-06-25 16:29:26 +0200 | [diff] [blame] | 3022 | /* Copy descriptors */ |
| 3023 | f->descriptors = usb_copy_descriptors(fsg_fs_function); |
| 3024 | if (unlikely(!f->descriptors)) |
| 3025 | return -ENOMEM; |
| 3026 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3027 | if (gadget_is_dualspeed(gadget)) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3028 | /* Assume endpoint addresses are the same for both speeds */ |
| 3029 | fsg_hs_bulk_in_desc.bEndpointAddress = |
| 3030 | fsg_fs_bulk_in_desc.bEndpointAddress; |
| 3031 | fsg_hs_bulk_out_desc.bEndpointAddress = |
| 3032 | fsg_fs_bulk_out_desc.bEndpointAddress; |
Michal Nazarewicz | 0fb2c2a | 2010-03-29 14:01:32 +0200 | [diff] [blame] | 3033 | f->hs_descriptors = usb_copy_descriptors(fsg_hs_function); |
Michal Nazarewicz | e5fd39d | 2010-06-25 16:29:26 +0200 | [diff] [blame] | 3034 | if (unlikely(!f->hs_descriptors)) { |
| 3035 | usb_free_descriptors(f->descriptors); |
Michal Nazarewicz | 0fb2c2a | 2010-03-29 14:01:32 +0200 | [diff] [blame] | 3036 | return -ENOMEM; |
Michal Nazarewicz | e5fd39d | 2010-06-25 16:29:26 +0200 | [diff] [blame] | 3037 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3038 | } |
| 3039 | |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 3040 | if (gadget_is_superspeed(gadget)) { |
| 3041 | unsigned max_burst; |
| 3042 | |
| 3043 | /* Calculate bMaxBurst, we know packet size is 1024 */ |
| 3044 | max_burst = min_t(unsigned, FSG_BUFLEN / 1024, 15); |
| 3045 | |
| 3046 | fsg_ss_bulk_in_desc.bEndpointAddress = |
| 3047 | fsg_fs_bulk_in_desc.bEndpointAddress; |
| 3048 | fsg_ss_bulk_in_comp_desc.bMaxBurst = max_burst; |
| 3049 | |
| 3050 | fsg_ss_bulk_out_desc.bEndpointAddress = |
| 3051 | fsg_fs_bulk_out_desc.bEndpointAddress; |
| 3052 | fsg_ss_bulk_out_comp_desc.bMaxBurst = max_burst; |
| 3053 | |
| 3054 | f->ss_descriptors = usb_copy_descriptors(fsg_ss_function); |
| 3055 | if (unlikely(!f->ss_descriptors)) { |
| 3056 | usb_free_descriptors(f->hs_descriptors); |
| 3057 | usb_free_descriptors(f->descriptors); |
| 3058 | return -ENOMEM; |
| 3059 | } |
| 3060 | } |
| 3061 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3062 | return 0; |
| 3063 | |
| 3064 | autoconf_fail: |
| 3065 | ERROR(fsg, "unable to autoconfigure all endpoints\n"); |
Michal Nazarewicz | e5fd39d | 2010-06-25 16:29:26 +0200 | [diff] [blame] | 3066 | return -ENOTSUPP; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3067 | } |
| 3068 | |
| 3069 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3070 | /****************************** ADD FUNCTION ******************************/ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3071 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3072 | static struct usb_gadget_strings *fsg_strings_array[] = { |
| 3073 | &fsg_stringtab, |
| 3074 | NULL, |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3075 | }; |
| 3076 | |
Michal Nazarewicz | 1dc9098 | 2010-06-16 12:07:57 +0200 | [diff] [blame] | 3077 | static int fsg_bind_config(struct usb_composite_dev *cdev, |
| 3078 | struct usb_configuration *c, |
| 3079 | struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3080 | { |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3081 | struct fsg_dev *fsg; |
| 3082 | int rc; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3083 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3084 | fsg = kzalloc(sizeof *fsg, GFP_KERNEL); |
| 3085 | if (unlikely(!fsg)) |
| 3086 | return -ENOMEM; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3087 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3088 | fsg->function.name = FSG_DRIVER_DESC; |
| 3089 | fsg->function.strings = fsg_strings_array; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3090 | fsg->function.bind = fsg_bind; |
| 3091 | fsg->function.unbind = fsg_unbind; |
| 3092 | fsg->function.setup = fsg_setup; |
| 3093 | fsg->function.set_alt = fsg_set_alt; |
| 3094 | fsg->function.disable = fsg_disable; |
| 3095 | |
| 3096 | fsg->common = common; |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 3097 | /* |
| 3098 | * Our caller holds a reference to common structure so we |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3099 | * don't have to be worry about it being freed until we return |
| 3100 | * from this function. So instead of incrementing counter now |
| 3101 | * and decrement in error recovery we increment it only when |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 3102 | * call to usb_add_function() was successful. |
| 3103 | */ |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3104 | |
| 3105 | rc = usb_add_function(c, &fsg->function); |
Michal Nazarewicz | 0fb2c2a | 2010-03-29 14:01:32 +0200 | [diff] [blame] | 3106 | if (unlikely(rc)) |
Michal Nazarewicz | e5fd39d | 2010-06-25 16:29:26 +0200 | [diff] [blame] | 3107 | kfree(fsg); |
| 3108 | else |
| 3109 | fsg_common_get(fsg->common); |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3110 | return rc; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3111 | } |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3112 | |
Michal Nazarewicz | 1dc9098 | 2010-06-16 12:07:57 +0200 | [diff] [blame] | 3113 | static inline int __deprecated __maybe_unused |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 3114 | fsg_add(struct usb_composite_dev *cdev, struct usb_configuration *c, |
Michal Nazarewicz | 1dc9098 | 2010-06-16 12:07:57 +0200 | [diff] [blame] | 3115 | struct fsg_common *common) |
| 3116 | { |
| 3117 | return fsg_bind_config(cdev, c, common); |
| 3118 | } |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3119 | |
| 3120 | |
| 3121 | /************************* Module parameters *************************/ |
| 3122 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3123 | struct fsg_module_parameters { |
| 3124 | char *file[FSG_MAX_LUNS]; |
Fabio Estevam | 4b5203f | 2012-01-12 16:09:15 -0200 | [diff] [blame] | 3125 | bool ro[FSG_MAX_LUNS]; |
| 3126 | bool removable[FSG_MAX_LUNS]; |
| 3127 | bool cdrom[FSG_MAX_LUNS]; |
| 3128 | bool nofua[FSG_MAX_LUNS]; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3129 | |
| 3130 | unsigned int file_count, ro_count, removable_count, cdrom_count; |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 3131 | unsigned int nofua_count; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3132 | unsigned int luns; /* nluns */ |
Fabio Estevam | 4b5203f | 2012-01-12 16:09:15 -0200 | [diff] [blame] | 3133 | bool stall; /* can_stall */ |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3134 | }; |
| 3135 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3136 | #define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc) \ |
| 3137 | module_param_array_named(prefix ## name, params.name, type, \ |
| 3138 | &prefix ## params.name ## _count, \ |
| 3139 | S_IRUGO); \ |
| 3140 | MODULE_PARM_DESC(prefix ## name, desc) |
| 3141 | |
| 3142 | #define _FSG_MODULE_PARAM(prefix, params, name, type, desc) \ |
| 3143 | module_param_named(prefix ## name, params.name, type, \ |
| 3144 | S_IRUGO); \ |
| 3145 | MODULE_PARM_DESC(prefix ## name, desc) |
| 3146 | |
| 3147 | #define FSG_MODULE_PARAMETERS(prefix, params) \ |
| 3148 | _FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp, \ |
| 3149 | "names of backing files or devices"); \ |
| 3150 | _FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool, \ |
| 3151 | "true to force read-only"); \ |
| 3152 | _FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool, \ |
| 3153 | "true to simulate removable media"); \ |
| 3154 | _FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool, \ |
| 3155 | "true to simulate CD-ROM instead of disk"); \ |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 3156 | _FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool, \ |
| 3157 | "true to ignore SCSI WRITE(10,12) FUA bit"); \ |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3158 | _FSG_MODULE_PARAM(prefix, params, luns, uint, \ |
| 3159 | "number of LUNs"); \ |
| 3160 | _FSG_MODULE_PARAM(prefix, params, stall, bool, \ |
| 3161 | "false to prevent bulk stalls") |
| 3162 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3163 | static void |
| 3164 | fsg_config_from_params(struct fsg_config *cfg, |
| 3165 | const struct fsg_module_parameters *params) |
| 3166 | { |
| 3167 | struct fsg_lun_config *lun; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 3168 | unsigned i; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3169 | |
| 3170 | /* Configure LUNs */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 3171 | cfg->nluns = |
| 3172 | min(params->luns ?: (params->file_count ?: 1u), |
| 3173 | (unsigned)FSG_MAX_LUNS); |
| 3174 | for (i = 0, lun = cfg->luns; i < cfg->nluns; ++i, ++lun) { |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3175 | lun->ro = !!params->ro[i]; |
| 3176 | lun->cdrom = !!params->cdrom[i]; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 3177 | lun->removable = /* Removable by default */ |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3178 | params->removable_count <= i || params->removable[i]; |
| 3179 | lun->filename = |
| 3180 | params->file_count > i && params->file[i][0] |
| 3181 | ? params->file[i] |
| 3182 | : 0; |
| 3183 | } |
| 3184 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 3185 | /* Let MSF use defaults */ |
Michal Nazarewicz | e8b6f8c | 2009-11-09 14:15:22 +0100 | [diff] [blame] | 3186 | cfg->lun_name_format = 0; |
| 3187 | cfg->thread_name = 0; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3188 | cfg->vendor_name = 0; |
| 3189 | cfg->product_name = 0; |
| 3190 | cfg->release = 0xffff; |
| 3191 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 3192 | cfg->ops = NULL; |
| 3193 | cfg->private_data = NULL; |
Michal Nazarewicz | c85efcb | 2009-11-09 14:15:26 +0100 | [diff] [blame] | 3194 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3195 | /* Finalise */ |
| 3196 | cfg->can_stall = params->stall; |
| 3197 | } |
| 3198 | |
| 3199 | static inline struct fsg_common * |
| 3200 | fsg_common_from_params(struct fsg_common *common, |
| 3201 | struct usb_composite_dev *cdev, |
| 3202 | const struct fsg_module_parameters *params) |
| 3203 | __attribute__((unused)); |
| 3204 | static inline struct fsg_common * |
| 3205 | fsg_common_from_params(struct fsg_common *common, |
| 3206 | struct usb_composite_dev *cdev, |
| 3207 | const struct fsg_module_parameters *params) |
| 3208 | { |
| 3209 | struct fsg_config cfg; |
| 3210 | fsg_config_from_params(&cfg, params); |
| 3211 | return fsg_common_init(common, cdev, &cfg); |
| 3212 | } |
| 3213 | |