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 | a8287a4 | 2012-06-12 12:42:18 +0200 | [diff] [blame] | 47 | * For more information about MSF and in particular its module |
| 48 | * parameters and sysfs interface read the |
| 49 | * <Documentation/usb/mass-storage.txt> file. |
| 50 | */ |
| 51 | |
| 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 |
Krzysztof Opasiak | 75ddead | 2015-07-20 20:15:19 +0200 | [diff] [blame] | 57 | * to FSG_MAX_LUNS). |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 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 | * |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 78 | * vendor_name |
| 79 | * product_name |
| 80 | * release Information used as a reply to INQUIRY |
| 81 | * request. To use default set to NULL, |
| 82 | * NULL, 0xffff respectively. The first |
| 83 | * field should be 8 and the second 16 |
| 84 | * characters or less. |
| 85 | * |
| 86 | * can_stall Set to permit function to halt bulk endpoints. |
| 87 | * Disabled on some USB devices known not |
| 88 | * to work correctly. You should set it |
| 89 | * to true. |
| 90 | * |
| 91 | * If "removable" is not set for a LUN then a backing file must be |
| 92 | * specified. If it is set, then NULL filename means the LUN's medium |
| 93 | * is not loaded (an empty string as "filename" in the fsg_config |
| 94 | * structure causes error). The CD-ROM emulation includes a single |
| 95 | * data track and no audio tracks; hence there need be only one |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 96 | * backing file per LUN. |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 97 | * |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 98 | * This function is heavily based on "File-backed Storage Gadget" by |
| 99 | * Alan Stern which in turn is heavily based on "Gadget Zero" by David |
| 100 | * Brownell. The driver's SCSI command interface was based on the |
| 101 | * "Information technology - Small Computer System Interface - 2" |
| 102 | * document from X3T9.2 Project 375D, Revision 10L, 7-SEP-93, |
| 103 | * available at <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>. |
| 104 | * The single exception is opcode 0x23 (READ FORMAT CAPACITIES), which |
| 105 | * was based on the "Universal Serial Bus Mass Storage Class UFI |
| 106 | * Command Specification" document, Revision 1.0, December 14, 1998, |
| 107 | * available at |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 108 | * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>. |
| 109 | */ |
| 110 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 111 | /* |
| 112 | * Driver Design |
| 113 | * |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 114 | * The MSF is fairly straightforward. There is a main kernel |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 115 | * thread that handles most of the work. Interrupt routines field |
| 116 | * callbacks from the controller driver: bulk- and interrupt-request |
| 117 | * completion notifications, endpoint-0 events, and disconnect events. |
| 118 | * Completion events are passed to the main thread by wakeup calls. Many |
| 119 | * ep0 requests are handled at interrupt time, but SetInterface, |
| 120 | * SetConfiguration, and device reset requests are forwarded to the |
| 121 | * thread in the form of "exceptions" using SIGUSR1 signals (since they |
| 122 | * should interrupt any ongoing file I/O operations). |
| 123 | * |
| 124 | * The thread's main routine implements the standard command/data/status |
| 125 | * parts of a SCSI interaction. It and its subroutines are full of tests |
| 126 | * for pending signals/exceptions -- all this polling is necessary since |
| 127 | * the kernel has no setjmp/longjmp equivalents. (Maybe this is an |
| 128 | * indication that the driver really wants to be running in userspace.) |
| 129 | * An important point is that so long as the thread is alive it keeps an |
| 130 | * open reference to the backing file. This will prevent unmounting |
| 131 | * the backing file's underlying filesystem and could cause problems |
| 132 | * during system shutdown, for example. To prevent such problems, the |
| 133 | * thread catches INT, TERM, and KILL signals and converts them into |
| 134 | * an EXIT exception. |
| 135 | * |
| 136 | * In normal operation the main thread is started during the gadget's |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 137 | * fsg_bind() callback and stopped during fsg_unbind(). But it can |
| 138 | * also exit when it receives a signal, and there's no point leaving |
Michal Nazarewicz | a8287a4 | 2012-06-12 12:42:18 +0200 | [diff] [blame] | 139 | * the gadget running when the thread is dead. As of this moment, MSF |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 140 | * provides no way to deregister the gadget when thread dies -- maybe |
| 141 | * a callback functions is needed. |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 142 | * |
| 143 | * To provide maximum throughput, the driver uses a circular pipeline of |
| 144 | * buffer heads (struct fsg_buffhd). In principle the pipeline can be |
| 145 | * arbitrarily long; in practice the benefits don't justify having more |
| 146 | * than 2 stages (i.e., double buffering). But it helps to think of the |
| 147 | * pipeline as being a long one. Each buffer head contains a bulk-in and |
| 148 | * a bulk-out request pointer (since the buffer can be used for both |
| 149 | * output and input -- directions always are given from the host's |
| 150 | * point of view) as well as a pointer to the buffer and various state |
| 151 | * variables. |
| 152 | * |
| 153 | * Use of the pipeline follows a simple protocol. There is a variable |
| 154 | * (fsg->next_buffhd_to_fill) that points to the next buffer head to use. |
| 155 | * At any time that buffer head may still be in use from an earlier |
| 156 | * request, so each buffer head has a state variable indicating whether |
| 157 | * it is EMPTY, FULL, or BUSY. Typical use involves waiting for the |
| 158 | * buffer head to be EMPTY, filling the buffer either by file I/O or by |
| 159 | * USB I/O (during which the buffer head is BUSY), and marking the buffer |
| 160 | * head FULL when the I/O is complete. Then the buffer will be emptied |
| 161 | * (again possibly by USB I/O, during which it is marked BUSY) and |
| 162 | * finally marked EMPTY again (possibly by a completion routine). |
| 163 | * |
| 164 | * A module parameter tells the driver to avoid stalling the bulk |
| 165 | * endpoints wherever the transport specification allows. This is |
| 166 | * necessary for some UDCs like the SuperH, which cannot reliably clear a |
| 167 | * halt on a bulk endpoint. However, under certain circumstances the |
| 168 | * Bulk-only specification requires a stall. In such cases the driver |
| 169 | * will halt the endpoint and set a flag indicating that it should clear |
| 170 | * the halt in software during the next device reset. Hopefully this |
| 171 | * will permit everything to work correctly. Furthermore, although the |
| 172 | * specification allows the bulk-out endpoint to halt when the host sends |
| 173 | * too much data, implementing this would cause an unavoidable race. |
| 174 | * The driver will always use the "no-stall" approach for OUT transfers. |
| 175 | * |
| 176 | * One subtle point concerns sending status-stage responses for ep0 |
| 177 | * requests. Some of these requests, such as device reset, can involve |
| 178 | * interrupting an ongoing file I/O operation, which might take an |
| 179 | * arbitrarily long time. During that delay the host might give up on |
| 180 | * the original ep0 request and issue a new one. When that happens the |
| 181 | * driver should not notify the host about completion of the original |
| 182 | * request, as the host will no longer be waiting for it. So the driver |
| 183 | * assigns to each ep0 request a unique tag, and it keeps track of the |
| 184 | * tag value of the request associated with a long-running exception |
| 185 | * (device-reset, interface-change, or configuration-change). When the |
| 186 | * exception handler is finished, the status-stage response is submitted |
| 187 | * only if the current ep0 request tag is equal to the exception request |
| 188 | * tag. Thus only the most recently received ep0 request will get a |
| 189 | * status-stage response. |
| 190 | * |
| 191 | * Warning: This driver source file is too long. It ought to be split up |
| 192 | * into a header file plus about 3 separate .c files, to handle the details |
| 193 | * of the Gadget, USB Mass Storage, and SCSI protocols. |
| 194 | */ |
| 195 | |
| 196 | |
| 197 | /* #define VERBOSE_DEBUG */ |
| 198 | /* #define DUMP_MSGS */ |
| 199 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 200 | #include <linux/blkdev.h> |
| 201 | #include <linux/completion.h> |
| 202 | #include <linux/dcache.h> |
| 203 | #include <linux/delay.h> |
| 204 | #include <linux/device.h> |
| 205 | #include <linux/fcntl.h> |
| 206 | #include <linux/file.h> |
| 207 | #include <linux/fs.h> |
| 208 | #include <linux/kref.h> |
| 209 | #include <linux/kthread.h> |
| 210 | #include <linux/limits.h> |
| 211 | #include <linux/rwsem.h> |
| 212 | #include <linux/slab.h> |
| 213 | #include <linux/spinlock.h> |
| 214 | #include <linux/string.h> |
| 215 | #include <linux/freezer.h> |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 216 | #include <linux/module.h> |
Felipe Balbi | 4a1e921 | 2015-08-06 11:23:32 -0500 | [diff] [blame] | 217 | #include <linux/uaccess.h> |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 218 | |
| 219 | #include <linux/usb/ch9.h> |
| 220 | #include <linux/usb/gadget.h> |
Jesper Juhl | a283c03 | 2011-01-29 02:26:51 +0100 | [diff] [blame] | 221 | #include <linux/usb/composite.h> |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 222 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 223 | #include "configfs.h" |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 224 | |
| 225 | |
Michal Nazarewicz | e8b6f8c | 2009-11-09 14:15:22 +0100 | [diff] [blame] | 226 | /*------------------------------------------------------------------------*/ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 227 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 228 | #define FSG_DRIVER_DESC "Mass Storage Function" |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 229 | #define FSG_DRIVER_VERSION "2009/09/11" |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 230 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 231 | static const char fsg_string_interface[] = "Mass Storage"; |
| 232 | |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 233 | #include "storage_common.h" |
Andrzej Pietrasiewicz | f3fed36 | 2013-09-26 14:38:17 +0200 | [diff] [blame] | 234 | #include "f_mass_storage.h" |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 235 | |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 236 | /* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */ |
| 237 | static struct usb_string fsg_strings[] = { |
| 238 | {FSG_STRING_INTERFACE, fsg_string_interface}, |
| 239 | {} |
| 240 | }; |
| 241 | |
| 242 | static struct usb_gadget_strings fsg_stringtab = { |
| 243 | .language = 0x0409, /* en-us */ |
| 244 | .strings = fsg_strings, |
| 245 | }; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 246 | |
Andrzej Pietrasiewicz | 4610f19 | 2013-09-26 14:38:19 +0200 | [diff] [blame] | 247 | static struct usb_gadget_strings *fsg_strings_array[] = { |
| 248 | &fsg_stringtab, |
| 249 | NULL, |
| 250 | }; |
| 251 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 252 | /*-------------------------------------------------------------------------*/ |
| 253 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 254 | struct fsg_dev; |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 255 | struct fsg_common; |
| 256 | |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 257 | /* Data shared by all the FSG instances. */ |
| 258 | struct fsg_common { |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 259 | struct usb_gadget *gadget; |
Roger Quadros | 95ed323 | 2011-05-09 13:08:07 +0300 | [diff] [blame] | 260 | struct usb_composite_dev *cdev; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 261 | struct fsg_dev *fsg, *new_fsg; |
| 262 | wait_queue_head_t fsg_wait; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 263 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 264 | /* filesem protects: backing files in use */ |
| 265 | struct rw_semaphore filesem; |
| 266 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 267 | /* lock protects: state, all the req_busy's */ |
| 268 | spinlock_t lock; |
| 269 | |
| 270 | struct usb_ep *ep0; /* Copy of gadget->ep0 */ |
| 271 | struct usb_request *ep0req; /* Copy of cdev->req */ |
| 272 | unsigned int ep0_req_tag; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 273 | |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 274 | struct fsg_buffhd *next_buffhd_to_fill; |
| 275 | struct fsg_buffhd *next_buffhd_to_drain; |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 276 | struct fsg_buffhd *buffhds; |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 277 | unsigned int fsg_num_buffers; |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 278 | |
| 279 | int cmnd_size; |
| 280 | u8 cmnd[MAX_COMMAND_SIZE]; |
| 281 | |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 282 | unsigned int lun; |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 283 | struct fsg_lun *luns[FSG_MAX_LUNS]; |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 284 | struct fsg_lun *curlun; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 285 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 286 | unsigned int bulk_out_maxpacket; |
| 287 | enum fsg_state state; /* For exception handling */ |
| 288 | unsigned int exception_req_tag; |
| 289 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 290 | enum data_direction data_dir; |
| 291 | u32 data_size; |
| 292 | u32 data_size_from_cmnd; |
| 293 | u32 tag; |
| 294 | u32 residue; |
| 295 | u32 usb_amount_left; |
| 296 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 297 | unsigned int can_stall:1; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 298 | unsigned int free_storage_on_release:1; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 299 | unsigned int phase_error:1; |
| 300 | unsigned int short_packet_received:1; |
| 301 | unsigned int bad_lun_okay:1; |
| 302 | unsigned int running:1; |
Andrzej Pietrasiewicz | bd528d4 | 2013-10-09 10:05:53 +0200 | [diff] [blame] | 303 | unsigned int sysfs:1; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 304 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 305 | int thread_wakeup_needed; |
| 306 | struct completion thread_notifier; |
| 307 | struct task_struct *thread_task; |
Michal Nazarewicz | e8b6f8c | 2009-11-09 14:15:22 +0100 | [diff] [blame] | 308 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 309 | /* Callback functions. */ |
| 310 | const struct fsg_operations *ops; |
Michal Nazarewicz | c85efcb | 2009-11-09 14:15:26 +0100 | [diff] [blame] | 311 | /* Gadget's private data. */ |
| 312 | void *private_data; |
| 313 | |
Philipp Gesang | 6ac4709 | 2016-08-01 17:04:19 +0200 | [diff] [blame] | 314 | char inquiry_string[INQUIRY_STRING_LEN]; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 315 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 316 | struct kref ref; |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 317 | }; |
| 318 | |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 319 | struct fsg_dev { |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 320 | struct usb_function function; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 321 | struct usb_gadget *gadget; /* Copy of cdev->gadget */ |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 322 | struct fsg_common *common; |
| 323 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 324 | u16 interface_number; |
| 325 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 326 | unsigned int bulk_in_enabled:1; |
| 327 | unsigned int bulk_out_enabled:1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 328 | |
| 329 | unsigned long atomic_bitflags; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 330 | #define IGNORE_BULK_OUT 0 |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 331 | |
| 332 | struct usb_ep *bulk_in; |
| 333 | struct usb_ep *bulk_out; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 334 | }; |
| 335 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 336 | static inline int __fsg_is_set(struct fsg_common *common, |
| 337 | const char *func, unsigned line) |
| 338 | { |
| 339 | if (common->fsg) |
| 340 | return 1; |
| 341 | 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] | 342 | WARN_ON(1); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 343 | return 0; |
| 344 | } |
| 345 | |
| 346 | #define fsg_is_set(common) likely(__fsg_is_set(common, __func__, __LINE__)) |
| 347 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 348 | static inline struct fsg_dev *fsg_from_func(struct usb_function *f) |
| 349 | { |
| 350 | return container_of(f, struct fsg_dev, function); |
| 351 | } |
| 352 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 353 | typedef void (*fsg_routine_t)(struct fsg_dev *); |
| 354 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 355 | static int exception_in_progress(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 356 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 357 | return common->state > FSG_STATE_IDLE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 358 | } |
| 359 | |
Greg Kroah-Hartman | 98346f7 | 2011-04-14 13:42:46 -0700 | [diff] [blame] | 360 | /* Make bulk-out requests be divisible by the maxpacket size */ |
| 361 | static void set_bulk_out_req_length(struct fsg_common *common, |
| 362 | struct fsg_buffhd *bh, unsigned int length) |
| 363 | { |
| 364 | unsigned int rem; |
| 365 | |
| 366 | bh->bulk_out_intended_length = length; |
| 367 | rem = length % common->bulk_out_maxpacket; |
| 368 | if (rem > 0) |
| 369 | length += common->bulk_out_maxpacket - rem; |
| 370 | bh->outreq->length = length; |
| 371 | } |
| 372 | |
| 373 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 374 | /*-------------------------------------------------------------------------*/ |
| 375 | |
| 376 | static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep) |
| 377 | { |
| 378 | const char *name; |
| 379 | |
| 380 | if (ep == fsg->bulk_in) |
| 381 | name = "bulk-in"; |
| 382 | else if (ep == fsg->bulk_out) |
| 383 | name = "bulk-out"; |
| 384 | else |
| 385 | name = ep->name; |
| 386 | DBG(fsg, "%s set halt\n", name); |
| 387 | return usb_ep_set_halt(ep); |
| 388 | } |
| 389 | |
| 390 | |
| 391 | /*-------------------------------------------------------------------------*/ |
| 392 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 393 | /* These routines may be called in process context or in_irq */ |
| 394 | |
| 395 | /* Caller must hold fsg->lock */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 396 | static void wakeup_thread(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 397 | { |
UCHINO Satoshi | d68c277 | 2013-05-23 11:10:11 +0900 | [diff] [blame] | 398 | smp_wmb(); /* ensure the write of bh->state is complete */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 399 | /* Tell the main thread that something has happened */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 400 | common->thread_wakeup_needed = 1; |
| 401 | if (common->thread_task) |
| 402 | wake_up_process(common->thread_task); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 403 | } |
| 404 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 405 | 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] | 406 | { |
| 407 | unsigned long flags; |
| 408 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 409 | /* |
| 410 | * Do nothing if a higher-priority exception is already in progress. |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 411 | * If a lower-or-equal priority exception is in progress, preempt it |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 412 | * and notify the main thread by sending it a signal. |
| 413 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 414 | spin_lock_irqsave(&common->lock, flags); |
| 415 | if (common->state <= new_state) { |
| 416 | common->exception_req_tag = common->ep0_req_tag; |
| 417 | common->state = new_state; |
| 418 | if (common->thread_task) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 419 | send_sig_info(SIGUSR1, SEND_SIG_FORCED, |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 420 | common->thread_task); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 421 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 422 | spin_unlock_irqrestore(&common->lock, flags); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | |
| 426 | /*-------------------------------------------------------------------------*/ |
| 427 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 428 | static int ep0_queue(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 429 | { |
| 430 | int rc; |
| 431 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 432 | rc = usb_ep_queue(common->ep0, common->ep0req, GFP_ATOMIC); |
| 433 | common->ep0->driver_data = common; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 434 | if (rc != 0 && rc != -ESHUTDOWN) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 435 | /* We can't do much more than wait for a reset */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 436 | WARNING(common, "error in submission: %s --> %d\n", |
| 437 | common->ep0->name, rc); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 438 | } |
| 439 | return rc; |
| 440 | } |
| 441 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 442 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 443 | /*-------------------------------------------------------------------------*/ |
| 444 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 445 | /* Completion handlers. These always run in_irq. */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 446 | |
| 447 | static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req) |
| 448 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 449 | struct fsg_common *common = ep->driver_data; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 450 | struct fsg_buffhd *bh = req->context; |
| 451 | |
| 452 | if (req->status || req->actual != req->length) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 453 | DBG(common, "%s --> %d, %u/%u\n", __func__, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 454 | req->status, req->actual, req->length); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 455 | if (req->status == -ECONNRESET) /* Request was cancelled */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 456 | usb_ep_fifo_flush(ep); |
| 457 | |
| 458 | /* Hold the lock while we update the request and buffer states */ |
| 459 | smp_wmb(); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 460 | spin_lock(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 461 | bh->inreq_busy = 0; |
| 462 | bh->state = BUF_STATE_EMPTY; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 463 | wakeup_thread(common); |
| 464 | spin_unlock(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 465 | } |
| 466 | |
| 467 | static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req) |
| 468 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 469 | struct fsg_common *common = ep->driver_data; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 470 | struct fsg_buffhd *bh = req->context; |
| 471 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 472 | dump_msg(common, "bulk-out", req->buf, req->actual); |
Greg Kroah-Hartman | 98346f7 | 2011-04-14 13:42:46 -0700 | [diff] [blame] | 473 | if (req->status || req->actual != bh->bulk_out_intended_length) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 474 | DBG(common, "%s --> %d, %u/%u\n", __func__, |
Greg Kroah-Hartman | 98346f7 | 2011-04-14 13:42:46 -0700 | [diff] [blame] | 475 | req->status, req->actual, bh->bulk_out_intended_length); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 476 | if (req->status == -ECONNRESET) /* Request was cancelled */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 477 | usb_ep_fifo_flush(ep); |
| 478 | |
| 479 | /* Hold the lock while we update the request and buffer states */ |
| 480 | smp_wmb(); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 481 | spin_lock(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 482 | bh->outreq_busy = 0; |
| 483 | bh->state = BUF_STATE_FULL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 484 | wakeup_thread(common); |
| 485 | spin_unlock(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 486 | } |
| 487 | |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 488 | static int _fsg_common_get_max_lun(struct fsg_common *common) |
| 489 | { |
| 490 | int i = ARRAY_SIZE(common->luns) - 1; |
| 491 | |
| 492 | while (i >= 0 && !common->luns[i]) |
| 493 | --i; |
| 494 | |
| 495 | return i; |
| 496 | } |
| 497 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 498 | static int fsg_setup(struct usb_function *f, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 499 | const struct usb_ctrlrequest *ctrl) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 500 | { |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 501 | struct fsg_dev *fsg = fsg_from_func(f); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 502 | struct usb_request *req = fsg->common->ep0req; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 503 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 504 | u16 w_value = le16_to_cpu(ctrl->wValue); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 505 | u16 w_length = le16_to_cpu(ctrl->wLength); |
| 506 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 507 | if (!fsg_is_set(fsg->common)) |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 508 | return -EOPNOTSUPP; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 509 | |
Roger Quadros | 73ee4da | 2011-04-05 18:36:38 +0300 | [diff] [blame] | 510 | ++fsg->common->ep0_req_tag; /* Record arrival of a new request */ |
| 511 | req->context = NULL; |
| 512 | req->length = 0; |
| 513 | dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl)); |
| 514 | |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 515 | switch (ctrl->bRequest) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 516 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 517 | case US_BULK_RESET_REQUEST: |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 518 | if (ctrl->bRequestType != |
| 519 | (USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 520 | break; |
Paul Zimmerman | ce7b612 | 2011-10-26 12:07:54 -0700 | [diff] [blame] | 521 | if (w_index != fsg->interface_number || w_value != 0 || |
| 522 | w_length != 0) |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 523 | return -EDOM; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 524 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 525 | /* |
| 526 | * Raise an exception to stop the current operation |
| 527 | * and reinitialize our state. |
| 528 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 529 | DBG(fsg, "bulk reset request\n"); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 530 | raise_exception(fsg->common, FSG_STATE_RESET); |
Pratyush Anand | 655403c | 2013-11-04 22:13:54 +0530 | [diff] [blame] | 531 | return USB_GADGET_DELAYED_STATUS; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 532 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 533 | case US_BULK_GET_MAX_LUN: |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 534 | if (ctrl->bRequestType != |
| 535 | (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 536 | break; |
Paul Zimmerman | db332bc | 2011-10-13 17:46:36 -0700 | [diff] [blame] | 537 | if (w_index != fsg->interface_number || w_value != 0 || |
| 538 | w_length != 1) |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 539 | return -EDOM; |
| 540 | VDBG(fsg, "get max LUN\n"); |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 541 | *(u8 *)req->buf = _fsg_common_get_max_lun(fsg->common); |
Michal Nazarewicz | b00ce11 | 2010-01-27 11:14:28 +0100 | [diff] [blame] | 542 | |
| 543 | /* Respond with data/status */ |
Michal Nazarewicz | d7e18a9 | 2010-02-03 11:37:17 +0100 | [diff] [blame] | 544 | req->length = min((u16)1, w_length); |
Michal Nazarewicz | b00ce11 | 2010-01-27 11:14:28 +0100 | [diff] [blame] | 545 | return ep0_queue(fsg->common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 546 | } |
| 547 | |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 548 | VDBG(fsg, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 549 | "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] | 550 | ctrl->bRequestType, ctrl->bRequest, |
| 551 | le16_to_cpu(ctrl->wValue), w_index, w_length); |
| 552 | return -EOPNOTSUPP; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | |
| 556 | /*-------------------------------------------------------------------------*/ |
| 557 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 558 | /* All the following routines run in process context */ |
| 559 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 560 | /* Use this for bulk or interrupt transfers, not ep0 */ |
| 561 | static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 562 | struct usb_request *req, int *pbusy, |
| 563 | enum fsg_buffer_state *state) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 564 | { |
| 565 | int rc; |
| 566 | |
| 567 | if (ep == fsg->bulk_in) |
| 568 | dump_msg(fsg, "bulk-in", req->buf, req->length); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 569 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 570 | spin_lock_irq(&fsg->common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 571 | *pbusy = 1; |
| 572 | *state = BUF_STATE_BUSY; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 573 | spin_unlock_irq(&fsg->common->lock); |
Michal Nazarewicz | 4953ef6 | 2014-08-27 22:58:48 +0200 | [diff] [blame] | 574 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 575 | rc = usb_ep_queue(ep, req, GFP_KERNEL); |
Michal Nazarewicz | 4953ef6 | 2014-08-27 22:58:48 +0200 | [diff] [blame] | 576 | if (rc == 0) |
| 577 | return; /* All good, we're done */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 578 | |
Michal Nazarewicz | 4953ef6 | 2014-08-27 22:58:48 +0200 | [diff] [blame] | 579 | *pbusy = 0; |
| 580 | *state = BUF_STATE_EMPTY; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 581 | |
Michal Nazarewicz | 4953ef6 | 2014-08-27 22:58:48 +0200 | [diff] [blame] | 582 | /* We can't do much more than wait for a reset */ |
| 583 | |
| 584 | /* |
| 585 | * Note: currently the net2280 driver fails zero-length |
| 586 | * submissions if DMA is enabled. |
| 587 | */ |
| 588 | if (rc != -ESHUTDOWN && !(rc == -EOPNOTSUPP && req->length == 0)) |
| 589 | WARNING(fsg, "error in submission: %s --> %d\n", ep->name, rc); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 590 | } |
| 591 | |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 592 | static bool start_in_transfer(struct fsg_common *common, struct fsg_buffhd *bh) |
| 593 | { |
| 594 | if (!fsg_is_set(common)) |
| 595 | return false; |
| 596 | start_transfer(common->fsg, common->fsg->bulk_in, |
| 597 | bh->inreq, &bh->inreq_busy, &bh->state); |
| 598 | return true; |
| 599 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 600 | |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 601 | static bool start_out_transfer(struct fsg_common *common, struct fsg_buffhd *bh) |
| 602 | { |
| 603 | if (!fsg_is_set(common)) |
| 604 | return false; |
| 605 | start_transfer(common->fsg, common->fsg->bulk_out, |
| 606 | bh->outreq, &bh->outreq_busy, &bh->state); |
| 607 | return true; |
| 608 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 609 | |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 610 | static int sleep_thread(struct fsg_common *common, bool can_freeze) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 611 | { |
| 612 | int rc = 0; |
| 613 | |
| 614 | /* Wait until a signal arrives or we are woken up */ |
| 615 | for (;;) { |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 616 | if (can_freeze) |
| 617 | try_to_freeze(); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 618 | set_current_state(TASK_INTERRUPTIBLE); |
| 619 | if (signal_pending(current)) { |
| 620 | rc = -EINTR; |
| 621 | break; |
| 622 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 623 | if (common->thread_wakeup_needed) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 624 | break; |
| 625 | schedule(); |
| 626 | } |
| 627 | __set_current_state(TASK_RUNNING); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 628 | common->thread_wakeup_needed = 0; |
UCHINO Satoshi | d68c277 | 2013-05-23 11:10:11 +0900 | [diff] [blame] | 629 | smp_rmb(); /* ensure the latest bh->state is visible */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 630 | return rc; |
| 631 | } |
| 632 | |
| 633 | |
| 634 | /*-------------------------------------------------------------------------*/ |
| 635 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 636 | static int do_read(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 637 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 638 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 639 | u32 lba; |
| 640 | struct fsg_buffhd *bh; |
| 641 | int rc; |
| 642 | u32 amount_left; |
| 643 | loff_t file_offset, file_offset_tmp; |
| 644 | unsigned int amount; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 645 | ssize_t nread; |
| 646 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 647 | /* |
| 648 | * Get the starting Logical Block Address and check that it's |
| 649 | * not too big. |
| 650 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 651 | if (common->cmnd[0] == READ_6) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 652 | lba = get_unaligned_be24(&common->cmnd[1]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 653 | else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 654 | lba = get_unaligned_be32(&common->cmnd[2]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 655 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 656 | /* |
| 657 | * We allow DPO (Disable Page Out = don't save data in the |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 658 | * cache) and FUA (Force Unit Access = don't read from the |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 659 | * cache), but we don't implement them. |
| 660 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 661 | if ((common->cmnd[1] & ~0x18) != 0) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 662 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 663 | return -EINVAL; |
| 664 | } |
| 665 | } |
| 666 | if (lba >= curlun->num_sectors) { |
| 667 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 668 | return -EINVAL; |
| 669 | } |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 670 | file_offset = ((loff_t) lba) << curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 671 | |
| 672 | /* Carry out the file reads */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 673 | amount_left = common->data_size_from_cmnd; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 674 | if (unlikely(amount_left == 0)) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 675 | return -EIO; /* No default reply */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 676 | |
| 677 | for (;;) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 678 | /* |
| 679 | * Figure out how much we need to read: |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 680 | * Try to read the remaining amount. |
| 681 | * But don't read more than the buffer size. |
| 682 | * And don't try to read past the end of the file. |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 683 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 684 | amount = min(amount_left, FSG_BUFLEN); |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 685 | amount = min((loff_t)amount, |
| 686 | curlun->file_length - file_offset); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 687 | |
| 688 | /* Wait for the next buffer to become available */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 689 | bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 690 | while (bh->state != BUF_STATE_EMPTY) { |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 691 | rc = sleep_thread(common, false); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 692 | if (rc) |
| 693 | return rc; |
| 694 | } |
| 695 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 696 | /* |
| 697 | * If we were asked to read past the end of file, |
| 698 | * end with an empty buffer. |
| 699 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 700 | if (amount == 0) { |
| 701 | curlun->sense_data = |
| 702 | SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 703 | curlun->sense_data_info = |
| 704 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 705 | curlun->info_valid = 1; |
| 706 | bh->inreq->length = 0; |
| 707 | bh->state = BUF_STATE_FULL; |
| 708 | break; |
| 709 | } |
| 710 | |
| 711 | /* Perform the read */ |
| 712 | file_offset_tmp = file_offset; |
| 713 | nread = vfs_read(curlun->filp, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 714 | (char __user *)bh->buf, |
| 715 | amount, &file_offset_tmp); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 716 | VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 717 | (unsigned long long)file_offset, (int)nread); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 718 | if (signal_pending(current)) |
| 719 | return -EINTR; |
| 720 | |
| 721 | if (nread < 0) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 722 | LDBG(curlun, "error in file read: %d\n", (int)nread); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 723 | nread = 0; |
| 724 | } else if (nread < amount) { |
| 725 | LDBG(curlun, "partial file read: %d/%u\n", |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 726 | (int)nread, amount); |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 727 | nread = round_down(nread, curlun->blksize); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 728 | } |
| 729 | file_offset += nread; |
| 730 | amount_left -= nread; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 731 | common->residue -= nread; |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 732 | |
| 733 | /* |
| 734 | * Except at the end of the transfer, nread will be |
| 735 | * equal to the buffer size, which is divisible by the |
| 736 | * bulk-in maxpacket size. |
| 737 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 738 | bh->inreq->length = nread; |
| 739 | bh->state = BUF_STATE_FULL; |
| 740 | |
| 741 | /* If an error occurred, report it and its position */ |
| 742 | if (nread < amount) { |
| 743 | curlun->sense_data = SS_UNRECOVERED_READ_ERROR; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 744 | curlun->sense_data_info = |
| 745 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 746 | curlun->info_valid = 1; |
| 747 | break; |
| 748 | } |
| 749 | |
| 750 | if (amount_left == 0) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 751 | break; /* No more left to read */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 752 | |
| 753 | /* Send this buffer and go read some more */ |
| 754 | bh->inreq->zero = 0; |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 755 | if (!start_in_transfer(common, bh)) |
| 756 | /* Don't know what to do if common->fsg is NULL */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 757 | return -EIO; |
| 758 | common->next_buffhd_to_fill = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 759 | } |
| 760 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 761 | return -EIO; /* No default reply */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | |
| 765 | /*-------------------------------------------------------------------------*/ |
| 766 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 767 | static int do_write(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 768 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 769 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 770 | u32 lba; |
| 771 | struct fsg_buffhd *bh; |
| 772 | int get_some_more; |
| 773 | u32 amount_left_to_req, amount_left_to_write; |
| 774 | loff_t usb_offset, file_offset, file_offset_tmp; |
| 775 | unsigned int amount; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 776 | ssize_t nwritten; |
| 777 | int rc; |
| 778 | |
| 779 | if (curlun->ro) { |
| 780 | curlun->sense_data = SS_WRITE_PROTECTED; |
| 781 | return -EINVAL; |
| 782 | } |
| 783 | spin_lock(&curlun->filp->f_lock); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 784 | curlun->filp->f_flags &= ~O_SYNC; /* Default is not to wait */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 785 | spin_unlock(&curlun->filp->f_lock); |
| 786 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 787 | /* |
| 788 | * Get the starting Logical Block Address and check that it's |
| 789 | * not too big |
| 790 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 791 | if (common->cmnd[0] == WRITE_6) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 792 | lba = get_unaligned_be24(&common->cmnd[1]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 793 | else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 794 | lba = get_unaligned_be32(&common->cmnd[2]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 795 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 796 | /* |
| 797 | * We allow DPO (Disable Page Out = don't save data in the |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 798 | * cache) and FUA (Force Unit Access = write directly to the |
| 799 | * medium). We don't implement DPO; we implement FUA by |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 800 | * performing synchronous output. |
| 801 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 802 | if (common->cmnd[1] & ~0x18) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 803 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 804 | return -EINVAL; |
| 805 | } |
Michal Nazarewicz | 9cfe745 | 2010-08-12 17:43:51 +0200 | [diff] [blame] | 806 | if (!curlun->nofua && (common->cmnd[1] & 0x08)) { /* FUA */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 807 | spin_lock(&curlun->filp->f_lock); |
| 808 | curlun->filp->f_flags |= O_SYNC; |
| 809 | spin_unlock(&curlun->filp->f_lock); |
| 810 | } |
| 811 | } |
| 812 | if (lba >= curlun->num_sectors) { |
| 813 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 814 | return -EINVAL; |
| 815 | } |
| 816 | |
| 817 | /* Carry out the file writes */ |
| 818 | get_some_more = 1; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 819 | file_offset = usb_offset = ((loff_t) lba) << curlun->blkbits; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 820 | amount_left_to_req = common->data_size_from_cmnd; |
| 821 | amount_left_to_write = common->data_size_from_cmnd; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 822 | |
| 823 | while (amount_left_to_write > 0) { |
| 824 | |
| 825 | /* Queue a request for more data from the host */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 826 | bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 827 | if (bh->state == BUF_STATE_EMPTY && get_some_more) { |
| 828 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 829 | /* |
| 830 | * Figure out how much we want to get: |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 831 | * Try to get the remaining amount, |
| 832 | * but not more than the buffer size. |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 833 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 834 | amount = min(amount_left_to_req, FSG_BUFLEN); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 835 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 836 | /* Beyond the end of the backing file? */ |
| 837 | if (usb_offset >= curlun->file_length) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 838 | get_some_more = 0; |
| 839 | curlun->sense_data = |
| 840 | SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 841 | curlun->sense_data_info = |
| 842 | usb_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 843 | curlun->info_valid = 1; |
| 844 | continue; |
| 845 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 846 | |
| 847 | /* Get the next buffer */ |
| 848 | usb_offset += amount; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 849 | common->usb_amount_left -= amount; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 850 | amount_left_to_req -= amount; |
| 851 | if (amount_left_to_req == 0) |
| 852 | get_some_more = 0; |
| 853 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 854 | /* |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 855 | * Except at the end of the transfer, amount will be |
| 856 | * equal to the buffer size, which is divisible by |
| 857 | * the bulk-out maxpacket size. |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 858 | */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 859 | set_bulk_out_req_length(common, bh, amount); |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 860 | if (!start_out_transfer(common, bh)) |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 861 | /* Dunno what to do if common->fsg is NULL */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 862 | return -EIO; |
| 863 | common->next_buffhd_to_fill = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 864 | continue; |
| 865 | } |
| 866 | |
| 867 | /* Write the received data to the backing file */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 868 | bh = common->next_buffhd_to_drain; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 869 | if (bh->state == BUF_STATE_EMPTY && !get_some_more) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 870 | break; /* We stopped early */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 871 | if (bh->state == BUF_STATE_FULL) { |
| 872 | smp_rmb(); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 873 | common->next_buffhd_to_drain = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 874 | bh->state = BUF_STATE_EMPTY; |
| 875 | |
| 876 | /* Did something go wrong with the transfer? */ |
| 877 | if (bh->outreq->status != 0) { |
| 878 | curlun->sense_data = SS_COMMUNICATION_FAILURE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 879 | curlun->sense_data_info = |
| 880 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 881 | curlun->info_valid = 1; |
| 882 | break; |
| 883 | } |
| 884 | |
| 885 | amount = bh->outreq->actual; |
| 886 | if (curlun->file_length - file_offset < amount) { |
| 887 | LERROR(curlun, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 888 | "write %u @ %llu beyond end %llu\n", |
| 889 | amount, (unsigned long long)file_offset, |
| 890 | (unsigned long long)curlun->file_length); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 891 | amount = curlun->file_length - file_offset; |
| 892 | } |
| 893 | |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 894 | /* Don't accept excess data. The spec doesn't say |
| 895 | * what to do in this case. We'll ignore the error. |
| 896 | */ |
| 897 | amount = min(amount, bh->bulk_out_intended_length); |
| 898 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 899 | /* Don't write a partial block */ |
| 900 | amount = round_down(amount, curlun->blksize); |
| 901 | if (amount == 0) |
| 902 | goto empty_write; |
| 903 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 904 | /* Perform the write */ |
| 905 | file_offset_tmp = file_offset; |
| 906 | nwritten = vfs_write(curlun->filp, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 907 | (char __user *)bh->buf, |
| 908 | amount, &file_offset_tmp); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 909 | VLDBG(curlun, "file write %u @ %llu -> %d\n", amount, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 910 | (unsigned long long)file_offset, (int)nwritten); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 911 | if (signal_pending(current)) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 912 | return -EINTR; /* Interrupted! */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 913 | |
| 914 | if (nwritten < 0) { |
| 915 | LDBG(curlun, "error in file write: %d\n", |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 916 | (int)nwritten); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 917 | nwritten = 0; |
| 918 | } else if (nwritten < amount) { |
| 919 | LDBG(curlun, "partial file write: %d/%u\n", |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 920 | (int)nwritten, amount); |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 921 | nwritten = round_down(nwritten, curlun->blksize); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 922 | } |
| 923 | file_offset += nwritten; |
| 924 | amount_left_to_write -= nwritten; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 925 | common->residue -= nwritten; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 926 | |
| 927 | /* If an error occurred, report it and its position */ |
| 928 | if (nwritten < amount) { |
| 929 | curlun->sense_data = SS_WRITE_ERROR; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 930 | curlun->sense_data_info = |
| 931 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 932 | curlun->info_valid = 1; |
| 933 | break; |
| 934 | } |
| 935 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 936 | empty_write: |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 937 | /* Did the host decide to stop early? */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 938 | if (bh->outreq->actual < bh->bulk_out_intended_length) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 939 | common->short_packet_received = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 940 | break; |
| 941 | } |
| 942 | continue; |
| 943 | } |
| 944 | |
| 945 | /* Wait for something to happen */ |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 946 | rc = sleep_thread(common, false); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 947 | if (rc) |
| 948 | return rc; |
| 949 | } |
| 950 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 951 | return -EIO; /* No default reply */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 952 | } |
| 953 | |
| 954 | |
| 955 | /*-------------------------------------------------------------------------*/ |
| 956 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 957 | static int do_synchronize_cache(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 958 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 959 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 960 | int rc; |
| 961 | |
| 962 | /* We ignore the requested LBA and write out all file's |
| 963 | * dirty data buffers. */ |
| 964 | rc = fsg_lun_fsync_sub(curlun); |
| 965 | if (rc) |
| 966 | curlun->sense_data = SS_WRITE_ERROR; |
| 967 | return 0; |
| 968 | } |
| 969 | |
| 970 | |
| 971 | /*-------------------------------------------------------------------------*/ |
| 972 | |
| 973 | static void invalidate_sub(struct fsg_lun *curlun) |
| 974 | { |
| 975 | struct file *filp = curlun->filp; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 976 | struct inode *inode = file_inode(filp); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 977 | unsigned long rc; |
| 978 | |
| 979 | rc = invalidate_mapping_pages(inode->i_mapping, 0, -1); |
Christoph Hellwig | 2ecdc82 | 2010-01-26 17:27:20 +0100 | [diff] [blame] | 980 | VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 981 | } |
| 982 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 983 | static int do_verify(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 984 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 985 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 986 | u32 lba; |
| 987 | u32 verification_length; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 988 | struct fsg_buffhd *bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 989 | loff_t file_offset, file_offset_tmp; |
| 990 | u32 amount_left; |
| 991 | unsigned int amount; |
| 992 | ssize_t nread; |
| 993 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 994 | /* |
| 995 | * Get the starting Logical Block Address and check that it's |
| 996 | * not too big. |
| 997 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 998 | lba = get_unaligned_be32(&common->cmnd[2]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 999 | if (lba >= curlun->num_sectors) { |
| 1000 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 1001 | return -EINVAL; |
| 1002 | } |
| 1003 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1004 | /* |
| 1005 | * We allow DPO (Disable Page Out = don't save data in the |
| 1006 | * cache) but we don't implement it. |
| 1007 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1008 | if (common->cmnd[1] & ~0x10) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1009 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1010 | return -EINVAL; |
| 1011 | } |
| 1012 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1013 | verification_length = get_unaligned_be16(&common->cmnd[7]); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1014 | if (unlikely(verification_length == 0)) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1015 | return -EIO; /* No default reply */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1016 | |
| 1017 | /* Prepare to carry out the file verify */ |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1018 | amount_left = verification_length << curlun->blkbits; |
| 1019 | file_offset = ((loff_t) lba) << curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1020 | |
| 1021 | /* Write out all the dirty buffers before invalidating them */ |
| 1022 | fsg_lun_fsync_sub(curlun); |
| 1023 | if (signal_pending(current)) |
| 1024 | return -EINTR; |
| 1025 | |
| 1026 | invalidate_sub(curlun); |
| 1027 | if (signal_pending(current)) |
| 1028 | return -EINTR; |
| 1029 | |
| 1030 | /* Just try to read the requested blocks */ |
| 1031 | while (amount_left > 0) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1032 | /* |
| 1033 | * Figure out how much we need to read: |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1034 | * Try to read the remaining amount, but not more than |
| 1035 | * the buffer size. |
| 1036 | * And don't try to read past the end of the file. |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1037 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1038 | amount = min(amount_left, FSG_BUFLEN); |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1039 | amount = min((loff_t)amount, |
| 1040 | curlun->file_length - file_offset); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1041 | if (amount == 0) { |
| 1042 | curlun->sense_data = |
| 1043 | SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1044 | curlun->sense_data_info = |
| 1045 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1046 | curlun->info_valid = 1; |
| 1047 | break; |
| 1048 | } |
| 1049 | |
| 1050 | /* Perform the read */ |
| 1051 | file_offset_tmp = file_offset; |
| 1052 | nread = vfs_read(curlun->filp, |
| 1053 | (char __user *) bh->buf, |
| 1054 | amount, &file_offset_tmp); |
| 1055 | VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, |
| 1056 | (unsigned long long) file_offset, |
| 1057 | (int) nread); |
| 1058 | if (signal_pending(current)) |
| 1059 | return -EINTR; |
| 1060 | |
| 1061 | if (nread < 0) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1062 | LDBG(curlun, "error in file verify: %d\n", (int)nread); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1063 | nread = 0; |
| 1064 | } else if (nread < amount) { |
| 1065 | LDBG(curlun, "partial file verify: %d/%u\n", |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1066 | (int)nread, amount); |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1067 | nread = round_down(nread, curlun->blksize); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1068 | } |
| 1069 | if (nread == 0) { |
| 1070 | curlun->sense_data = SS_UNRECOVERED_READ_ERROR; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1071 | curlun->sense_data_info = |
| 1072 | file_offset >> curlun->blkbits; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1073 | curlun->info_valid = 1; |
| 1074 | break; |
| 1075 | } |
| 1076 | file_offset += nread; |
| 1077 | amount_left -= nread; |
| 1078 | } |
| 1079 | return 0; |
| 1080 | } |
| 1081 | |
| 1082 | |
| 1083 | /*-------------------------------------------------------------------------*/ |
| 1084 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1085 | static int do_inquiry(struct fsg_common *common, struct fsg_buffhd *bh) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1086 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1087 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1088 | u8 *buf = (u8 *) bh->buf; |
| 1089 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1090 | if (!curlun) { /* Unsupported LUNs are okay */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1091 | common->bad_lun_okay = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1092 | memset(buf, 0, 36); |
Tal Shorer | fddc26f | 2015-03-06 21:53:32 +0200 | [diff] [blame] | 1093 | buf[0] = TYPE_NO_LUN; /* Unsupported, no device-type */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1094 | buf[4] = 31; /* Additional length */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1095 | return 36; |
| 1096 | } |
| 1097 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1098 | buf[0] = curlun->cdrom ? TYPE_ROM : TYPE_DISK; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1099 | buf[1] = curlun->removable ? 0x80 : 0; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1100 | buf[2] = 2; /* ANSI SCSI level 2 */ |
| 1101 | buf[3] = 2; /* SCSI-2 INQUIRY data format */ |
| 1102 | buf[4] = 31; /* Additional length */ |
| 1103 | buf[5] = 0; /* No special options */ |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1104 | buf[6] = 0; |
| 1105 | buf[7] = 0; |
Philipp Gesang | 6ac4709 | 2016-08-01 17:04:19 +0200 | [diff] [blame] | 1106 | if (curlun->inquiry_string[0]) |
| 1107 | memcpy(buf + 8, curlun->inquiry_string, |
| 1108 | sizeof(curlun->inquiry_string)); |
| 1109 | else |
| 1110 | memcpy(buf + 8, common->inquiry_string, |
| 1111 | sizeof(common->inquiry_string)); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1112 | return 36; |
| 1113 | } |
| 1114 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1115 | 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] | 1116 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1117 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1118 | u8 *buf = (u8 *) bh->buf; |
| 1119 | u32 sd, sdinfo; |
| 1120 | int valid; |
| 1121 | |
| 1122 | /* |
| 1123 | * From the SCSI-2 spec., section 7.9 (Unit attention condition): |
| 1124 | * |
| 1125 | * If a REQUEST SENSE command is received from an initiator |
| 1126 | * with a pending unit attention condition (before the target |
| 1127 | * generates the contingent allegiance condition), then the |
| 1128 | * target shall either: |
| 1129 | * a) report any pending sense data and preserve the unit |
| 1130 | * attention condition on the logical unit, or, |
| 1131 | * b) report the unit attention condition, may discard any |
| 1132 | * pending sense data, and clear the unit attention |
| 1133 | * condition on the logical unit for that initiator. |
| 1134 | * |
| 1135 | * FSG normally uses option a); enable this code to use option b). |
| 1136 | */ |
| 1137 | #if 0 |
| 1138 | if (curlun && curlun->unit_attention_data != SS_NO_SENSE) { |
| 1139 | curlun->sense_data = curlun->unit_attention_data; |
| 1140 | curlun->unit_attention_data = SS_NO_SENSE; |
| 1141 | } |
| 1142 | #endif |
| 1143 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1144 | if (!curlun) { /* Unsupported LUNs are okay */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1145 | common->bad_lun_okay = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1146 | sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; |
| 1147 | sdinfo = 0; |
| 1148 | valid = 0; |
| 1149 | } else { |
| 1150 | sd = curlun->sense_data; |
| 1151 | sdinfo = curlun->sense_data_info; |
| 1152 | valid = curlun->info_valid << 7; |
| 1153 | curlun->sense_data = SS_NO_SENSE; |
| 1154 | curlun->sense_data_info = 0; |
| 1155 | curlun->info_valid = 0; |
| 1156 | } |
| 1157 | |
| 1158 | memset(buf, 0, 18); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1159 | buf[0] = valid | 0x70; /* Valid, current error */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1160 | buf[2] = SK(sd); |
| 1161 | put_unaligned_be32(sdinfo, &buf[3]); /* Sense information */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1162 | buf[7] = 18 - 8; /* Additional sense length */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1163 | buf[12] = ASC(sd); |
| 1164 | buf[13] = ASCQ(sd); |
| 1165 | return 18; |
| 1166 | } |
| 1167 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1168 | 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] | 1169 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1170 | struct fsg_lun *curlun = common->curlun; |
| 1171 | u32 lba = get_unaligned_be32(&common->cmnd[2]); |
| 1172 | int pmi = common->cmnd[8]; |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1173 | u8 *buf = (u8 *)bh->buf; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1174 | |
| 1175 | /* Check the PMI and LBA fields */ |
| 1176 | if (pmi > 1 || (pmi == 0 && lba != 0)) { |
| 1177 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1178 | return -EINVAL; |
| 1179 | } |
| 1180 | |
| 1181 | put_unaligned_be32(curlun->num_sectors - 1, &buf[0]); |
| 1182 | /* Max logical block */ |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1183 | put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1184 | return 8; |
| 1185 | } |
| 1186 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1187 | 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] | 1188 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1189 | struct fsg_lun *curlun = common->curlun; |
| 1190 | int msf = common->cmnd[1] & 0x02; |
| 1191 | u32 lba = get_unaligned_be32(&common->cmnd[2]); |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1192 | u8 *buf = (u8 *)bh->buf; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1193 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1194 | if (common->cmnd[1] & ~0x02) { /* Mask away MSF */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1195 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1196 | return -EINVAL; |
| 1197 | } |
| 1198 | if (lba >= curlun->num_sectors) { |
| 1199 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 1200 | return -EINVAL; |
| 1201 | } |
| 1202 | |
| 1203 | memset(buf, 0, 8); |
| 1204 | buf[0] = 0x01; /* 2048 bytes of user data, rest is EC */ |
| 1205 | store_cdrom_address(&buf[4], msf, lba); |
| 1206 | return 8; |
| 1207 | } |
| 1208 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1209 | 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] | 1210 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1211 | struct fsg_lun *curlun = common->curlun; |
| 1212 | int msf = common->cmnd[1] & 0x02; |
| 1213 | int start_track = common->cmnd[6]; |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1214 | u8 *buf = (u8 *)bh->buf; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1215 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1216 | if ((common->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1217 | start_track > 1) { |
| 1218 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1219 | return -EINVAL; |
| 1220 | } |
| 1221 | |
| 1222 | memset(buf, 0, 20); |
| 1223 | buf[1] = (20-2); /* TOC data length */ |
| 1224 | buf[2] = 1; /* First track number */ |
| 1225 | buf[3] = 1; /* Last track number */ |
| 1226 | buf[5] = 0x16; /* Data track, copying allowed */ |
| 1227 | buf[6] = 0x01; /* Only track is number 1 */ |
| 1228 | store_cdrom_address(&buf[8], msf, 0); |
| 1229 | |
| 1230 | buf[13] = 0x16; /* Lead-out track is data */ |
| 1231 | buf[14] = 0xAA; /* Lead-out track number */ |
| 1232 | store_cdrom_address(&buf[16], msf, curlun->num_sectors); |
| 1233 | return 20; |
| 1234 | } |
| 1235 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1236 | 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] | 1237 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1238 | struct fsg_lun *curlun = common->curlun; |
| 1239 | int mscmnd = common->cmnd[0]; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1240 | u8 *buf = (u8 *) bh->buf; |
| 1241 | u8 *buf0 = buf; |
| 1242 | int pc, page_code; |
| 1243 | int changeable_values, all_pages; |
| 1244 | int valid_page = 0; |
| 1245 | int len, limit; |
| 1246 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1247 | if ((common->cmnd[1] & ~0x08) != 0) { /* Mask away DBD */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1248 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1249 | return -EINVAL; |
| 1250 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1251 | pc = common->cmnd[2] >> 6; |
| 1252 | page_code = common->cmnd[2] & 0x3f; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1253 | if (pc == 3) { |
| 1254 | curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED; |
| 1255 | return -EINVAL; |
| 1256 | } |
| 1257 | changeable_values = (pc == 1); |
| 1258 | all_pages = (page_code == 0x3f); |
| 1259 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1260 | /* |
| 1261 | * Write the mode parameter header. Fixed values are: default |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1262 | * medium type, no cache control (DPOFUA), and no block descriptors. |
| 1263 | * The only variable value is the WriteProtect bit. We will fill in |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1264 | * the mode data length later. |
| 1265 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1266 | memset(buf, 0, 8); |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1267 | if (mscmnd == MODE_SENSE) { |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1268 | buf[2] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1269 | buf += 4; |
| 1270 | limit = 255; |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1271 | } else { /* MODE_SENSE_10 */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1272 | buf[3] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1273 | buf += 8; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1274 | limit = 65535; /* Should really be FSG_BUFLEN */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1275 | } |
| 1276 | |
| 1277 | /* No block descriptors */ |
| 1278 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1279 | /* |
| 1280 | * The mode pages, in numerical order. The only page we support |
| 1281 | * is the Caching page. |
| 1282 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1283 | if (page_code == 0x08 || all_pages) { |
| 1284 | valid_page = 1; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1285 | buf[0] = 0x08; /* Page code */ |
| 1286 | buf[1] = 10; /* Page length */ |
| 1287 | memset(buf+2, 0, 10); /* None of the fields are changeable */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1288 | |
| 1289 | if (!changeable_values) { |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1290 | buf[2] = 0x04; /* Write cache enable, */ |
| 1291 | /* Read cache not disabled */ |
| 1292 | /* No cache retention priorities */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1293 | put_unaligned_be16(0xffff, &buf[4]); |
| 1294 | /* Don't disable prefetch */ |
| 1295 | /* Minimum prefetch = 0 */ |
| 1296 | put_unaligned_be16(0xffff, &buf[8]); |
| 1297 | /* Maximum prefetch */ |
| 1298 | put_unaligned_be16(0xffff, &buf[10]); |
| 1299 | /* Maximum prefetch ceiling */ |
| 1300 | } |
| 1301 | buf += 12; |
| 1302 | } |
| 1303 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1304 | /* |
| 1305 | * Check that a valid page was requested and the mode data length |
| 1306 | * isn't too long. |
| 1307 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1308 | len = buf - buf0; |
| 1309 | if (!valid_page || len > limit) { |
| 1310 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1311 | return -EINVAL; |
| 1312 | } |
| 1313 | |
| 1314 | /* Store the mode data length */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1315 | if (mscmnd == MODE_SENSE) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1316 | buf0[0] = len - 1; |
| 1317 | else |
| 1318 | put_unaligned_be16(len - 2, buf0); |
| 1319 | return len; |
| 1320 | } |
| 1321 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1322 | static int do_start_stop(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1323 | { |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1324 | struct fsg_lun *curlun = common->curlun; |
| 1325 | int loej, start; |
| 1326 | |
| 1327 | if (!curlun) { |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1328 | return -EINVAL; |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1329 | } else if (!curlun->removable) { |
| 1330 | curlun->sense_data = SS_INVALID_COMMAND; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1331 | return -EINVAL; |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1332 | } else if ((common->cmnd[1] & ~0x01) != 0 || /* Mask away Immed */ |
| 1333 | (common->cmnd[4] & ~0x03) != 0) { /* Mask LoEj, Start */ |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1334 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1335 | return -EINVAL; |
| 1336 | } |
| 1337 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1338 | loej = common->cmnd[4] & 0x02; |
| 1339 | start = common->cmnd[4] & 0x01; |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1340 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1341 | /* |
| 1342 | * Our emulation doesn't support mounting; the medium is |
| 1343 | * available for use as soon as it is loaded. |
| 1344 | */ |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1345 | if (start) { |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1346 | if (!fsg_lun_is_open(curlun)) { |
| 1347 | curlun->sense_data = SS_MEDIUM_NOT_PRESENT; |
| 1348 | return -EINVAL; |
| 1349 | } |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1350 | return 0; |
Fabien Chouteau | 31436a1 | 2010-04-26 12:34:54 +0200 | [diff] [blame] | 1351 | } |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1352 | |
| 1353 | /* Are we allowed to unload the media? */ |
| 1354 | if (curlun->prevent_medium_removal) { |
| 1355 | LDBG(curlun, "unload attempt prevented\n"); |
| 1356 | curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED; |
| 1357 | return -EINVAL; |
| 1358 | } |
| 1359 | |
| 1360 | if (!loej) |
| 1361 | return 0; |
| 1362 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 1363 | up_read(&common->filesem); |
| 1364 | down_write(&common->filesem); |
| 1365 | fsg_lun_close(curlun); |
| 1366 | up_write(&common->filesem); |
| 1367 | down_read(&common->filesem); |
| 1368 | |
Andrzej Pietrasiewicz | 2b50800 | 2012-11-29 15:06:58 +0100 | [diff] [blame] | 1369 | return 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1370 | } |
| 1371 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1372 | static int do_prevent_allow(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1373 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1374 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1375 | int prevent; |
| 1376 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1377 | if (!common->curlun) { |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 1378 | return -EINVAL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1379 | } else if (!common->curlun->removable) { |
| 1380 | common->curlun->sense_data = SS_INVALID_COMMAND; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1381 | return -EINVAL; |
| 1382 | } |
| 1383 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1384 | prevent = common->cmnd[4] & 0x01; |
| 1385 | if ((common->cmnd[4] & ~0x01) != 0) { /* Mask away Prevent */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1386 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1387 | return -EINVAL; |
| 1388 | } |
| 1389 | |
| 1390 | if (curlun->prevent_medium_removal && !prevent) |
| 1391 | fsg_lun_fsync_sub(curlun); |
| 1392 | curlun->prevent_medium_removal = prevent; |
| 1393 | return 0; |
| 1394 | } |
| 1395 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1396 | static int do_read_format_capacities(struct fsg_common *common, |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1397 | struct fsg_buffhd *bh) |
| 1398 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1399 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1400 | u8 *buf = (u8 *) bh->buf; |
| 1401 | |
| 1402 | buf[0] = buf[1] = buf[2] = 0; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1403 | buf[3] = 8; /* Only the Current/Maximum Capacity Descriptor */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1404 | buf += 4; |
| 1405 | |
| 1406 | put_unaligned_be32(curlun->num_sectors, &buf[0]); |
| 1407 | /* Number of blocks */ |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1408 | put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1409 | buf[4] = 0x02; /* Current capacity */ |
| 1410 | return 12; |
| 1411 | } |
| 1412 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1413 | 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] | 1414 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1415 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1416 | |
| 1417 | /* We don't support MODE SELECT */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1418 | if (curlun) |
| 1419 | curlun->sense_data = SS_INVALID_COMMAND; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1420 | return -EINVAL; |
| 1421 | } |
| 1422 | |
| 1423 | |
| 1424 | /*-------------------------------------------------------------------------*/ |
| 1425 | |
| 1426 | static int halt_bulk_in_endpoint(struct fsg_dev *fsg) |
| 1427 | { |
| 1428 | int rc; |
| 1429 | |
| 1430 | rc = fsg_set_halt(fsg, fsg->bulk_in); |
| 1431 | if (rc == -EAGAIN) |
| 1432 | VDBG(fsg, "delayed bulk-in endpoint halt\n"); |
| 1433 | while (rc != 0) { |
| 1434 | if (rc != -EAGAIN) { |
| 1435 | WARNING(fsg, "usb_ep_set_halt -> %d\n", rc); |
| 1436 | rc = 0; |
| 1437 | break; |
| 1438 | } |
| 1439 | |
| 1440 | /* Wait for a short time and then try again */ |
| 1441 | if (msleep_interruptible(100) != 0) |
| 1442 | return -EINTR; |
| 1443 | rc = usb_ep_set_halt(fsg->bulk_in); |
| 1444 | } |
| 1445 | return rc; |
| 1446 | } |
| 1447 | |
| 1448 | static int wedge_bulk_in_endpoint(struct fsg_dev *fsg) |
| 1449 | { |
| 1450 | int rc; |
| 1451 | |
| 1452 | DBG(fsg, "bulk-in set wedge\n"); |
| 1453 | rc = usb_ep_set_wedge(fsg->bulk_in); |
| 1454 | if (rc == -EAGAIN) |
| 1455 | VDBG(fsg, "delayed bulk-in endpoint wedge\n"); |
| 1456 | while (rc != 0) { |
| 1457 | if (rc != -EAGAIN) { |
| 1458 | WARNING(fsg, "usb_ep_set_wedge -> %d\n", rc); |
| 1459 | rc = 0; |
| 1460 | break; |
| 1461 | } |
| 1462 | |
| 1463 | /* Wait for a short time and then try again */ |
| 1464 | if (msleep_interruptible(100) != 0) |
| 1465 | return -EINTR; |
| 1466 | rc = usb_ep_set_wedge(fsg->bulk_in); |
| 1467 | } |
| 1468 | return rc; |
| 1469 | } |
| 1470 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1471 | static int throw_away_data(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1472 | { |
| 1473 | struct fsg_buffhd *bh; |
| 1474 | u32 amount; |
| 1475 | int rc; |
| 1476 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1477 | for (bh = common->next_buffhd_to_drain; |
| 1478 | bh->state != BUF_STATE_EMPTY || common->usb_amount_left > 0; |
| 1479 | bh = common->next_buffhd_to_drain) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1480 | |
| 1481 | /* Throw away the data in a filled buffer */ |
| 1482 | if (bh->state == BUF_STATE_FULL) { |
| 1483 | smp_rmb(); |
| 1484 | bh->state = BUF_STATE_EMPTY; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1485 | common->next_buffhd_to_drain = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1486 | |
| 1487 | /* A short packet or an error ends everything */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 1488 | if (bh->outreq->actual < bh->bulk_out_intended_length || |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1489 | bh->outreq->status != 0) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1490 | raise_exception(common, |
| 1491 | FSG_STATE_ABORT_BULK_OUT); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1492 | return -EINTR; |
| 1493 | } |
| 1494 | continue; |
| 1495 | } |
| 1496 | |
| 1497 | /* Try to submit another request if we need one */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1498 | bh = common->next_buffhd_to_fill; |
| 1499 | if (bh->state == BUF_STATE_EMPTY |
| 1500 | && common->usb_amount_left > 0) { |
| 1501 | amount = min(common->usb_amount_left, FSG_BUFLEN); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1502 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1503 | /* |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1504 | * Except at the end of the transfer, amount will be |
| 1505 | * equal to the buffer size, which is divisible by |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1506 | * the bulk-out maxpacket size. |
| 1507 | */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 1508 | set_bulk_out_req_length(common, bh, amount); |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 1509 | if (!start_out_transfer(common, bh)) |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1510 | /* Dunno what to do if common->fsg is NULL */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1511 | return -EIO; |
| 1512 | common->next_buffhd_to_fill = bh->next; |
| 1513 | common->usb_amount_left -= amount; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1514 | continue; |
| 1515 | } |
| 1516 | |
| 1517 | /* Otherwise wait for something to happen */ |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 1518 | rc = sleep_thread(common, true); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1519 | if (rc) |
| 1520 | return rc; |
| 1521 | } |
| 1522 | return 0; |
| 1523 | } |
| 1524 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1525 | static int finish_reply(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1526 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1527 | struct fsg_buffhd *bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1528 | int rc = 0; |
| 1529 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1530 | switch (common->data_dir) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1531 | case DATA_DIR_NONE: |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1532 | break; /* Nothing to send */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1533 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1534 | /* |
| 1535 | * 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] | 1536 | * this must be CB or CBI with an unknown command. We mustn't |
| 1537 | * try to send or receive any data. So stall both bulk pipes |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1538 | * if we can and wait for a reset. |
| 1539 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1540 | case DATA_DIR_UNKNOWN: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1541 | if (!common->can_stall) { |
| 1542 | /* Nothing */ |
| 1543 | } else if (fsg_is_set(common)) { |
| 1544 | fsg_set_halt(common->fsg, common->fsg->bulk_out); |
| 1545 | rc = halt_bulk_in_endpoint(common->fsg); |
| 1546 | } else { |
| 1547 | /* Don't know what to do if common->fsg is NULL */ |
| 1548 | rc = -EIO; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1549 | } |
| 1550 | break; |
| 1551 | |
| 1552 | /* All but the last buffer of data must have already been sent */ |
| 1553 | case DATA_DIR_TO_HOST: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1554 | if (common->data_size == 0) { |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1555 | /* Nothing to send */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1556 | |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 1557 | /* Don't know what to do if common->fsg is NULL */ |
| 1558 | } else if (!fsg_is_set(common)) { |
| 1559 | rc = -EIO; |
| 1560 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1561 | /* If there's no residue, simply send the last buffer */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1562 | } else if (common->residue == 0) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1563 | bh->inreq->zero = 0; |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 1564 | if (!start_in_transfer(common, bh)) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1565 | return -EIO; |
| 1566 | common->next_buffhd_to_fill = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1567 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1568 | /* |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 1569 | * For Bulk-only, mark the end of the data with a short |
| 1570 | * packet. If we are allowed to stall, halt the bulk-in |
| 1571 | * endpoint. (Note: This violates the Bulk-Only Transport |
| 1572 | * specification, which requires us to pad the data if we |
| 1573 | * don't halt the endpoint. Presumably nobody will mind.) |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1574 | */ |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 1575 | } else { |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1576 | bh->inreq->zero = 1; |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 1577 | if (!start_in_transfer(common, bh)) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1578 | rc = -EIO; |
| 1579 | common->next_buffhd_to_fill = bh->next; |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 1580 | if (common->can_stall) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1581 | rc = halt_bulk_in_endpoint(common->fsg); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1582 | } |
| 1583 | break; |
| 1584 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1585 | /* |
| 1586 | * We have processed all we want from the data the host has sent. |
| 1587 | * There may still be outstanding bulk-out requests. |
| 1588 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1589 | case DATA_DIR_FROM_HOST: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1590 | if (common->residue == 0) { |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1591 | /* Nothing to receive */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1592 | |
| 1593 | /* Did the host stop sending unexpectedly early? */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1594 | } else if (common->short_packet_received) { |
| 1595 | raise_exception(common, FSG_STATE_ABORT_BULK_OUT); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1596 | rc = -EINTR; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1597 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1598 | /* |
| 1599 | * We haven't processed all the incoming data. Even though |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1600 | * we may be allowed to stall, doing so would cause a race. |
| 1601 | * The controller may already have ACK'ed all the remaining |
| 1602 | * bulk-out packets, in which case the host wouldn't see a |
| 1603 | * STALL. Not realizing the endpoint was halted, it wouldn't |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1604 | * clear the halt -- leading to problems later on. |
| 1605 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1606 | #if 0 |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1607 | } else if (common->can_stall) { |
| 1608 | if (fsg_is_set(common)) |
| 1609 | fsg_set_halt(common->fsg, |
| 1610 | common->fsg->bulk_out); |
| 1611 | raise_exception(common, FSG_STATE_ABORT_BULK_OUT); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1612 | rc = -EINTR; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1613 | #endif |
| 1614 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1615 | /* |
| 1616 | * We can't stall. Read in the excess data and throw it |
| 1617 | * all away. |
| 1618 | */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1619 | } else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1620 | rc = throw_away_data(common); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1621 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1622 | break; |
| 1623 | } |
| 1624 | return rc; |
| 1625 | } |
| 1626 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1627 | static int send_status(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1628 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1629 | struct fsg_lun *curlun = common->curlun; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1630 | struct fsg_buffhd *bh; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1631 | struct bulk_cs_wrap *csw; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1632 | int rc; |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1633 | u8 status = US_BULK_STAT_OK; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1634 | u32 sd, sdinfo = 0; |
| 1635 | |
| 1636 | /* Wait for the next buffer to become available */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1637 | bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1638 | while (bh->state != BUF_STATE_EMPTY) { |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 1639 | rc = sleep_thread(common, true); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1640 | if (rc) |
| 1641 | return rc; |
| 1642 | } |
| 1643 | |
| 1644 | if (curlun) { |
| 1645 | sd = curlun->sense_data; |
| 1646 | sdinfo = curlun->sense_data_info; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1647 | } else if (common->bad_lun_okay) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1648 | sd = SS_NO_SENSE; |
| 1649 | else |
| 1650 | sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; |
| 1651 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1652 | if (common->phase_error) { |
| 1653 | DBG(common, "sending phase-error status\n"); |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1654 | status = US_BULK_STAT_PHASE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1655 | sd = SS_INVALID_COMMAND; |
| 1656 | } else if (sd != SS_NO_SENSE) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1657 | DBG(common, "sending command-failure status\n"); |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1658 | status = US_BULK_STAT_FAIL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1659 | 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] | 1660 | " info x%x\n", |
| 1661 | SK(sd), ASC(sd), ASCQ(sd), sdinfo); |
| 1662 | } |
| 1663 | |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1664 | /* Store and send the Bulk-only CSW */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1665 | csw = (void *)bh->buf; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1666 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1667 | csw->Signature = cpu_to_le32(US_BULK_CS_SIGN); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1668 | csw->Tag = common->tag; |
| 1669 | csw->Residue = cpu_to_le32(common->residue); |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1670 | csw->Status = status; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1671 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 1672 | bh->inreq->length = US_BULK_CS_WRAP_LEN; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 1673 | bh->inreq->zero = 0; |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 1674 | if (!start_in_transfer(common, bh)) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1675 | /* Don't know what to do if common->fsg is NULL */ |
| 1676 | return -EIO; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1677 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1678 | common->next_buffhd_to_fill = bh->next; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1679 | return 0; |
| 1680 | } |
| 1681 | |
| 1682 | |
| 1683 | /*-------------------------------------------------------------------------*/ |
| 1684 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1685 | /* |
| 1686 | * Check whether the command is properly formed and whether its data size |
| 1687 | * and direction agree with the values we already have. |
| 1688 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1689 | static int check_command(struct fsg_common *common, int cmnd_size, |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1690 | enum data_direction data_dir, unsigned int mask, |
| 1691 | int needs_medium, const char *name) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1692 | { |
| 1693 | int i; |
Sebastian Andrzej Siewior | 98f3a1b | 2012-12-03 15:32:36 +0100 | [diff] [blame] | 1694 | unsigned int lun = common->cmnd[1] >> 5; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1695 | static const char dirletter[4] = {'u', 'o', 'i', 'n'}; |
| 1696 | char hdlen[20]; |
| 1697 | struct fsg_lun *curlun; |
| 1698 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1699 | hdlen[0] = 0; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1700 | if (common->data_dir != DATA_DIR_UNKNOWN) |
| 1701 | sprintf(hdlen, ", H%c=%u", dirletter[(int) common->data_dir], |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1702 | common->data_size); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1703 | 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] | 1704 | name, cmnd_size, dirletter[(int) data_dir], |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1705 | common->data_size_from_cmnd, common->cmnd_size, hdlen); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1706 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1707 | /* |
| 1708 | * We can't reply at all until we know the correct data direction |
| 1709 | * and size. |
| 1710 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1711 | if (common->data_size_from_cmnd == 0) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1712 | data_dir = DATA_DIR_NONE; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1713 | if (common->data_size < common->data_size_from_cmnd) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1714 | /* |
| 1715 | * Host data size < Device data size is a phase error. |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1716 | * Carry out the command, but only transfer as much as |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1717 | * we are allowed. |
| 1718 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1719 | common->data_size_from_cmnd = common->data_size; |
| 1720 | common->phase_error = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1721 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1722 | common->residue = common->data_size; |
| 1723 | common->usb_amount_left = common->data_size; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1724 | |
| 1725 | /* Conflicting data directions is a phase error */ |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1726 | if (common->data_dir != data_dir && common->data_size_from_cmnd > 0) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1727 | common->phase_error = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1728 | return -EINVAL; |
| 1729 | } |
| 1730 | |
| 1731 | /* Verify the length of the command itself */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1732 | if (cmnd_size != common->cmnd_size) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1733 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1734 | /* |
| 1735 | * Special case workaround: There are plenty of buggy SCSI |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1736 | * implementations. Many have issues with cbw->Length |
| 1737 | * field passing a wrong command size. For those cases we |
| 1738 | * always try to work around the problem by using the length |
| 1739 | * sent by the host side provided it is at least as large |
| 1740 | * as the correct command length. |
| 1741 | * Examples of such cases would be MS-Windows, which issues |
| 1742 | * REQUEST SENSE with cbw->Length == 12 where it should |
| 1743 | * be 6, and xbox360 issuing INQUIRY, TEST UNIT READY and |
| 1744 | * REQUEST SENSE with cbw->Length == 10 where it should |
| 1745 | * be 6 as well. |
| 1746 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1747 | if (cmnd_size <= common->cmnd_size) { |
| 1748 | DBG(common, "%s is buggy! Expected length %d " |
Michal Nazarewicz | a41ae41 | 2009-10-28 16:57:20 +0100 | [diff] [blame] | 1749 | "but we got %d\n", name, |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1750 | cmnd_size, common->cmnd_size); |
| 1751 | cmnd_size = common->cmnd_size; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1752 | } else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1753 | common->phase_error = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1754 | return -EINVAL; |
| 1755 | } |
| 1756 | } |
| 1757 | |
| 1758 | /* Check that the LUN values are consistent */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1759 | if (common->lun != lun) |
Sebastian Andrzej Siewior | 98f3a1b | 2012-12-03 15:32:36 +0100 | [diff] [blame] | 1760 | DBG(common, "using LUN %u from CBW, not LUN %u from CDB\n", |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1761 | common->lun, lun); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1762 | |
| 1763 | /* Check the LUN */ |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 1764 | curlun = common->curlun; |
| 1765 | if (curlun) { |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1766 | if (common->cmnd[0] != REQUEST_SENSE) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1767 | curlun->sense_data = SS_NO_SENSE; |
| 1768 | curlun->sense_data_info = 0; |
| 1769 | curlun->info_valid = 0; |
| 1770 | } |
| 1771 | } else { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1772 | common->bad_lun_okay = 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1773 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1774 | /* |
| 1775 | * INQUIRY and REQUEST SENSE commands are explicitly allowed |
| 1776 | * to use unsupported LUNs; all others may not. |
| 1777 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1778 | if (common->cmnd[0] != INQUIRY && |
| 1779 | common->cmnd[0] != REQUEST_SENSE) { |
Sebastian Andrzej Siewior | 98f3a1b | 2012-12-03 15:32:36 +0100 | [diff] [blame] | 1780 | DBG(common, "unsupported LUN %u\n", common->lun); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1781 | return -EINVAL; |
| 1782 | } |
| 1783 | } |
| 1784 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1785 | /* |
| 1786 | * If a unit attention condition exists, only INQUIRY and |
| 1787 | * REQUEST SENSE commands are allowed; anything else must fail. |
| 1788 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1789 | if (curlun && curlun->unit_attention_data != SS_NO_SENSE && |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 1790 | common->cmnd[0] != INQUIRY && |
| 1791 | common->cmnd[0] != REQUEST_SENSE) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1792 | curlun->sense_data = curlun->unit_attention_data; |
| 1793 | curlun->unit_attention_data = SS_NO_SENSE; |
| 1794 | return -EINVAL; |
| 1795 | } |
| 1796 | |
| 1797 | /* Check that only command bytes listed in the mask are non-zero */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1798 | common->cmnd[1] &= 0x1f; /* Mask away the LUN */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1799 | for (i = 1; i < cmnd_size; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1800 | if (common->cmnd[i] && !(mask & (1 << i))) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1801 | if (curlun) |
| 1802 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1803 | return -EINVAL; |
| 1804 | } |
| 1805 | } |
| 1806 | |
| 1807 | /* If the medium isn't mounted and the command needs to access |
| 1808 | * it, return an error. */ |
| 1809 | if (curlun && !fsg_lun_is_open(curlun) && needs_medium) { |
| 1810 | curlun->sense_data = SS_MEDIUM_NOT_PRESENT; |
| 1811 | return -EINVAL; |
| 1812 | } |
| 1813 | |
| 1814 | return 0; |
| 1815 | } |
| 1816 | |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 1817 | /* wrapper of check_command for data size in blocks handling */ |
| 1818 | static int check_command_size_in_blocks(struct fsg_common *common, |
| 1819 | int cmnd_size, enum data_direction data_dir, |
| 1820 | unsigned int mask, int needs_medium, const char *name) |
| 1821 | { |
| 1822 | if (common->curlun) |
| 1823 | common->data_size_from_cmnd <<= common->curlun->blkbits; |
| 1824 | return check_command(common, cmnd_size, data_dir, |
| 1825 | mask, needs_medium, name); |
| 1826 | } |
| 1827 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1828 | static int do_scsi_command(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1829 | { |
| 1830 | struct fsg_buffhd *bh; |
| 1831 | int rc; |
| 1832 | int reply = -EINVAL; |
| 1833 | int i; |
| 1834 | static char unknown[16]; |
| 1835 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1836 | dump_cdb(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1837 | |
| 1838 | /* Wait for the next buffer to become available for data or status */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1839 | bh = common->next_buffhd_to_fill; |
| 1840 | common->next_buffhd_to_drain = bh; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1841 | while (bh->state != BUF_STATE_EMPTY) { |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 1842 | rc = sleep_thread(common, true); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1843 | if (rc) |
| 1844 | return rc; |
| 1845 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1846 | common->phase_error = 0; |
| 1847 | common->short_packet_received = 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1848 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1849 | down_read(&common->filesem); /* We're using the backing file */ |
| 1850 | switch (common->cmnd[0]) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1851 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1852 | case INQUIRY: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1853 | common->data_size_from_cmnd = common->cmnd[4]; |
| 1854 | reply = check_command(common, 6, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1855 | (1<<4), 0, |
| 1856 | "INQUIRY"); |
| 1857 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1858 | reply = do_inquiry(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1859 | break; |
| 1860 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1861 | case MODE_SELECT: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1862 | common->data_size_from_cmnd = common->cmnd[4]; |
| 1863 | reply = check_command(common, 6, DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1864 | (1<<1) | (1<<4), 0, |
| 1865 | "MODE SELECT(6)"); |
| 1866 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1867 | reply = do_mode_select(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1868 | break; |
| 1869 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1870 | case MODE_SELECT_10: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1871 | common->data_size_from_cmnd = |
| 1872 | get_unaligned_be16(&common->cmnd[7]); |
| 1873 | reply = check_command(common, 10, DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1874 | (1<<1) | (3<<7), 0, |
| 1875 | "MODE SELECT(10)"); |
| 1876 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1877 | reply = do_mode_select(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1878 | break; |
| 1879 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1880 | case MODE_SENSE: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1881 | common->data_size_from_cmnd = common->cmnd[4]; |
| 1882 | reply = check_command(common, 6, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1883 | (1<<1) | (1<<2) | (1<<4), 0, |
| 1884 | "MODE SENSE(6)"); |
| 1885 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1886 | reply = do_mode_sense(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1887 | break; |
| 1888 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1889 | case MODE_SENSE_10: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1890 | common->data_size_from_cmnd = |
| 1891 | get_unaligned_be16(&common->cmnd[7]); |
| 1892 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1893 | (1<<1) | (1<<2) | (3<<7), 0, |
| 1894 | "MODE SENSE(10)"); |
| 1895 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1896 | reply = do_mode_sense(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1897 | break; |
| 1898 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1899 | case ALLOW_MEDIUM_REMOVAL: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1900 | common->data_size_from_cmnd = 0; |
| 1901 | reply = check_command(common, 6, DATA_DIR_NONE, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1902 | (1<<4), 0, |
| 1903 | "PREVENT-ALLOW MEDIUM REMOVAL"); |
| 1904 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1905 | reply = do_prevent_allow(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1906 | break; |
| 1907 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1908 | case READ_6: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1909 | i = common->cmnd[4]; |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 1910 | common->data_size_from_cmnd = (i == 0) ? 256 : i; |
| 1911 | reply = check_command_size_in_blocks(common, 6, |
| 1912 | DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1913 | (7<<1) | (1<<4), 1, |
| 1914 | "READ(6)"); |
| 1915 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1916 | reply = do_read(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1917 | break; |
| 1918 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1919 | case READ_10: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1920 | common->data_size_from_cmnd = |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 1921 | get_unaligned_be16(&common->cmnd[7]); |
| 1922 | reply = check_command_size_in_blocks(common, 10, |
| 1923 | DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1924 | (1<<1) | (0xf<<2) | (3<<7), 1, |
| 1925 | "READ(10)"); |
| 1926 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1927 | reply = do_read(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1928 | break; |
| 1929 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1930 | case READ_12: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1931 | common->data_size_from_cmnd = |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 1932 | get_unaligned_be32(&common->cmnd[6]); |
| 1933 | reply = check_command_size_in_blocks(common, 12, |
| 1934 | DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1935 | (1<<1) | (0xf<<2) | (0xf<<6), 1, |
| 1936 | "READ(12)"); |
| 1937 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1938 | reply = do_read(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1939 | break; |
| 1940 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1941 | case READ_CAPACITY: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1942 | common->data_size_from_cmnd = 8; |
| 1943 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1944 | (0xf<<2) | (1<<8), 1, |
| 1945 | "READ CAPACITY"); |
| 1946 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1947 | reply = do_read_capacity(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1948 | break; |
| 1949 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1950 | case READ_HEADER: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1951 | if (!common->curlun || !common->curlun->cdrom) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1952 | goto unknown_cmnd; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1953 | common->data_size_from_cmnd = |
| 1954 | get_unaligned_be16(&common->cmnd[7]); |
| 1955 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1956 | (3<<7) | (0x1f<<1), 1, |
| 1957 | "READ HEADER"); |
| 1958 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1959 | reply = do_read_header(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1960 | break; |
| 1961 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1962 | case READ_TOC: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1963 | if (!common->curlun || !common->curlun->cdrom) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1964 | goto unknown_cmnd; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1965 | common->data_size_from_cmnd = |
| 1966 | get_unaligned_be16(&common->cmnd[7]); |
| 1967 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1968 | (7<<6) | (1<<1), 1, |
| 1969 | "READ TOC"); |
| 1970 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1971 | reply = do_read_toc(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1972 | break; |
| 1973 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1974 | case READ_FORMAT_CAPACITIES: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1975 | common->data_size_from_cmnd = |
| 1976 | get_unaligned_be16(&common->cmnd[7]); |
| 1977 | reply = check_command(common, 10, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1978 | (3<<7), 1, |
| 1979 | "READ FORMAT CAPACITIES"); |
| 1980 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1981 | reply = do_read_format_capacities(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1982 | break; |
| 1983 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1984 | case REQUEST_SENSE: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1985 | common->data_size_from_cmnd = common->cmnd[4]; |
| 1986 | reply = check_command(common, 6, DATA_DIR_TO_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1987 | (1<<4), 0, |
| 1988 | "REQUEST SENSE"); |
| 1989 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1990 | reply = do_request_sense(common, bh); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 1991 | break; |
| 1992 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1993 | case START_STOP: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1994 | common->data_size_from_cmnd = 0; |
| 1995 | reply = check_command(common, 6, DATA_DIR_NONE, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 1996 | (1<<1) | (1<<4), 0, |
| 1997 | "START-STOP UNIT"); |
| 1998 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 1999 | reply = do_start_stop(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2000 | break; |
| 2001 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2002 | case SYNCHRONIZE_CACHE: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2003 | common->data_size_from_cmnd = 0; |
| 2004 | reply = check_command(common, 10, DATA_DIR_NONE, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2005 | (0xf<<2) | (3<<7), 1, |
| 2006 | "SYNCHRONIZE CACHE"); |
| 2007 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2008 | reply = do_synchronize_cache(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2009 | break; |
| 2010 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2011 | case TEST_UNIT_READY: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2012 | common->data_size_from_cmnd = 0; |
| 2013 | reply = check_command(common, 6, DATA_DIR_NONE, |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2014 | 0, 1, |
| 2015 | "TEST UNIT READY"); |
| 2016 | break; |
| 2017 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2018 | /* |
| 2019 | * Although optional, this command is used by MS-Windows. We |
| 2020 | * support a minimal version: BytChk must be 0. |
| 2021 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2022 | case VERIFY: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2023 | common->data_size_from_cmnd = 0; |
| 2024 | reply = check_command(common, 10, DATA_DIR_NONE, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2025 | (1<<1) | (0xf<<2) | (3<<7), 1, |
| 2026 | "VERIFY"); |
| 2027 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2028 | reply = do_verify(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2029 | break; |
| 2030 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2031 | case WRITE_6: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2032 | i = common->cmnd[4]; |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2033 | common->data_size_from_cmnd = (i == 0) ? 256 : i; |
| 2034 | reply = check_command_size_in_blocks(common, 6, |
| 2035 | DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2036 | (7<<1) | (1<<4), 1, |
| 2037 | "WRITE(6)"); |
| 2038 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2039 | reply = do_write(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2040 | break; |
| 2041 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2042 | case WRITE_10: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2043 | common->data_size_from_cmnd = |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2044 | get_unaligned_be16(&common->cmnd[7]); |
| 2045 | reply = check_command_size_in_blocks(common, 10, |
| 2046 | DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2047 | (1<<1) | (0xf<<2) | (3<<7), 1, |
| 2048 | "WRITE(10)"); |
| 2049 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2050 | reply = do_write(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2051 | break; |
| 2052 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2053 | case WRITE_12: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2054 | common->data_size_from_cmnd = |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2055 | get_unaligned_be32(&common->cmnd[6]); |
| 2056 | reply = check_command_size_in_blocks(common, 12, |
| 2057 | DATA_DIR_FROM_HOST, |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2058 | (1<<1) | (0xf<<2) | (0xf<<6), 1, |
| 2059 | "WRITE(12)"); |
| 2060 | if (reply == 0) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2061 | reply = do_write(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2062 | break; |
| 2063 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2064 | /* |
| 2065 | * Some mandatory commands that we recognize but don't implement. |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2066 | * They don't mean much in this setting. It's left as an exercise |
| 2067 | * for anyone interested to implement RESERVE and RELEASE in terms |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2068 | * of Posix locks. |
| 2069 | */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2070 | case FORMAT_UNIT: |
| 2071 | case RELEASE: |
| 2072 | case RESERVE: |
| 2073 | case SEND_DIAGNOSTIC: |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2074 | /* Fall through */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2075 | |
| 2076 | default: |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2077 | unknown_cmnd: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2078 | common->data_size_from_cmnd = 0; |
| 2079 | sprintf(unknown, "Unknown x%02x", common->cmnd[0]); |
| 2080 | reply = check_command(common, common->cmnd_size, |
Alan Stern | c85dcda | 2012-04-11 16:09:10 -0400 | [diff] [blame] | 2081 | DATA_DIR_UNKNOWN, ~0, 0, unknown); |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2082 | if (reply == 0) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2083 | common->curlun->sense_data = SS_INVALID_COMMAND; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2084 | reply = -EINVAL; |
| 2085 | } |
| 2086 | break; |
| 2087 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2088 | up_read(&common->filesem); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2089 | |
| 2090 | if (reply == -EINTR || signal_pending(current)) |
| 2091 | return -EINTR; |
| 2092 | |
| 2093 | /* Set up the single reply buffer for finish_reply() */ |
| 2094 | if (reply == -EINVAL) |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2095 | reply = 0; /* Error reply length */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2096 | if (reply >= 0 && common->data_dir == DATA_DIR_TO_HOST) { |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2097 | reply = min((u32)reply, common->data_size_from_cmnd); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2098 | bh->inreq->length = reply; |
| 2099 | bh->state = BUF_STATE_FULL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2100 | common->residue -= reply; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2101 | } /* Otherwise it's already set */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2102 | |
| 2103 | return 0; |
| 2104 | } |
| 2105 | |
| 2106 | |
| 2107 | /*-------------------------------------------------------------------------*/ |
| 2108 | |
| 2109 | static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 2110 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2111 | struct usb_request *req = bh->outreq; |
Sebastian Andrzej Siewior | 7ac4704 | 2012-02-25 18:28:09 +0100 | [diff] [blame] | 2112 | struct bulk_cb_wrap *cbw = req->buf; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2113 | struct fsg_common *common = fsg->common; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2114 | |
| 2115 | /* Was this a real packet? Should it be ignored? */ |
| 2116 | if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags)) |
| 2117 | return -EINVAL; |
| 2118 | |
| 2119 | /* Is the CBW valid? */ |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2120 | if (req->actual != US_BULK_CB_WRAP_LEN || |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2121 | cbw->Signature != cpu_to_le32( |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2122 | US_BULK_CB_SIGN)) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2123 | DBG(fsg, "invalid CBW: len %u sig 0x%x\n", |
| 2124 | req->actual, |
| 2125 | le32_to_cpu(cbw->Signature)); |
| 2126 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2127 | /* |
| 2128 | * The Bulk-only spec says we MUST stall the IN endpoint |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2129 | * (6.6.1), so it's unavoidable. It also says we must |
| 2130 | * retain this state until the next reset, but there's |
| 2131 | * no way to tell the controller driver it should ignore |
| 2132 | * Clear-Feature(HALT) requests. |
| 2133 | * |
| 2134 | * We aren't required to halt the OUT endpoint; instead |
| 2135 | * we can simply accept and discard any data received |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2136 | * until the next reset. |
| 2137 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2138 | wedge_bulk_in_endpoint(fsg); |
| 2139 | set_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags); |
| 2140 | return -EINVAL; |
| 2141 | } |
| 2142 | |
| 2143 | /* Is the CBW meaningful? */ |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2144 | if (cbw->Lun >= ARRAY_SIZE(common->luns) || |
| 2145 | cbw->Flags & ~US_BULK_FLAG_IN || cbw->Length <= 0 || |
| 2146 | cbw->Length > MAX_COMMAND_SIZE) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2147 | DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, " |
| 2148 | "cmdlen %u\n", |
| 2149 | cbw->Lun, cbw->Flags, cbw->Length); |
| 2150 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2151 | /* |
| 2152 | * We can do anything we want here, so let's stall the |
| 2153 | * bulk pipes if we are allowed to. |
| 2154 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2155 | if (common->can_stall) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2156 | fsg_set_halt(fsg, fsg->bulk_out); |
| 2157 | halt_bulk_in_endpoint(fsg); |
| 2158 | } |
| 2159 | return -EINVAL; |
| 2160 | } |
| 2161 | |
| 2162 | /* Save the command for later */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2163 | common->cmnd_size = cbw->Length; |
| 2164 | memcpy(common->cmnd, cbw->CDB, common->cmnd_size); |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2165 | if (cbw->Flags & US_BULK_FLAG_IN) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2166 | common->data_dir = DATA_DIR_TO_HOST; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2167 | else |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2168 | common->data_dir = DATA_DIR_FROM_HOST; |
| 2169 | common->data_size = le32_to_cpu(cbw->DataTransferLength); |
| 2170 | if (common->data_size == 0) |
| 2171 | common->data_dir = DATA_DIR_NONE; |
| 2172 | common->lun = cbw->Lun; |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2173 | if (common->lun < ARRAY_SIZE(common->luns)) |
Andrzej Pietrasiewicz | 8b903fd | 2013-09-26 14:38:18 +0200 | [diff] [blame] | 2174 | common->curlun = common->luns[common->lun]; |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2175 | else |
| 2176 | common->curlun = NULL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2177 | common->tag = cbw->Tag; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2178 | return 0; |
| 2179 | } |
| 2180 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2181 | static int get_next_command(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2182 | { |
| 2183 | struct fsg_buffhd *bh; |
| 2184 | int rc = 0; |
| 2185 | |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2186 | /* Wait for the next buffer to become available */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2187 | bh = common->next_buffhd_to_fill; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2188 | while (bh->state != BUF_STATE_EMPTY) { |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 2189 | rc = sleep_thread(common, true); |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2190 | if (rc) |
| 2191 | return rc; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2192 | } |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2193 | |
| 2194 | /* Queue a request to read a Bulk-only CBW */ |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2195 | set_bulk_out_req_length(common, bh, US_BULK_CB_WRAP_LEN); |
Michal Nazarewicz | fe52f79 | 2010-10-28 17:31:21 +0200 | [diff] [blame] | 2196 | if (!start_out_transfer(common, bh)) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2197 | /* Don't know what to do if common->fsg is NULL */ |
| 2198 | return -EIO; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2199 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2200 | /* |
| 2201 | * We will drain the buffer in software, which means we |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2202 | * can reuse it for the next filling. No need to advance |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2203 | * next_buffhd_to_fill. |
| 2204 | */ |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2205 | |
| 2206 | /* Wait for the CBW to arrive */ |
| 2207 | while (bh->state != BUF_STATE_FULL) { |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 2208 | rc = sleep_thread(common, true); |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2209 | if (rc) |
| 2210 | return rc; |
| 2211 | } |
| 2212 | smp_rmb(); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2213 | rc = fsg_is_set(common) ? received_cbw(common->fsg, bh) : -EIO; |
Michal Nazarewicz | 93bcf12 | 2009-10-28 16:57:19 +0100 | [diff] [blame] | 2214 | bh->state = BUF_STATE_EMPTY; |
| 2215 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2216 | return rc; |
| 2217 | } |
| 2218 | |
| 2219 | |
| 2220 | /*-------------------------------------------------------------------------*/ |
| 2221 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2222 | static int alloc_request(struct fsg_common *common, struct usb_ep *ep, |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2223 | struct usb_request **preq) |
| 2224 | { |
| 2225 | *preq = usb_ep_alloc_request(ep, GFP_ATOMIC); |
| 2226 | if (*preq) |
| 2227 | return 0; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2228 | ERROR(common, "can't allocate request for %s\n", ep->name); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2229 | return -ENOMEM; |
| 2230 | } |
| 2231 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2232 | /* Reset interface setting and re-init endpoint state (toggle etc). */ |
| 2233 | 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] | 2234 | { |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2235 | struct fsg_dev *fsg; |
| 2236 | int i, rc = 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2237 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2238 | if (common->running) |
| 2239 | DBG(common, "reset interface\n"); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2240 | |
| 2241 | reset: |
| 2242 | /* Deallocate the requests */ |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2243 | if (common->fsg) { |
| 2244 | fsg = common->fsg; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2245 | |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2246 | for (i = 0; i < common->fsg_num_buffers; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2247 | struct fsg_buffhd *bh = &common->buffhds[i]; |
| 2248 | |
| 2249 | if (bh->inreq) { |
| 2250 | usb_ep_free_request(fsg->bulk_in, bh->inreq); |
| 2251 | bh->inreq = NULL; |
| 2252 | } |
| 2253 | if (bh->outreq) { |
| 2254 | usb_ep_free_request(fsg->bulk_out, bh->outreq); |
| 2255 | bh->outreq = NULL; |
| 2256 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2257 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2258 | |
| 2259 | /* Disable the endpoints */ |
| 2260 | if (fsg->bulk_in_enabled) { |
| 2261 | usb_ep_disable(fsg->bulk_in); |
| 2262 | fsg->bulk_in_enabled = 0; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2263 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2264 | if (fsg->bulk_out_enabled) { |
| 2265 | usb_ep_disable(fsg->bulk_out); |
| 2266 | fsg->bulk_out_enabled = 0; |
| 2267 | } |
| 2268 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2269 | common->fsg = NULL; |
| 2270 | wake_up(&common->fsg_wait); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2271 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2272 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2273 | common->running = 0; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2274 | if (!new_fsg || rc) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2275 | return rc; |
| 2276 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2277 | common->fsg = new_fsg; |
| 2278 | fsg = common->fsg; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2279 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2280 | /* Enable the endpoints */ |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame] | 2281 | rc = config_ep_by_speed(common->gadget, &(fsg->function), fsg->bulk_in); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2282 | if (rc) |
| 2283 | goto reset; |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame] | 2284 | rc = usb_ep_enable(fsg->bulk_in); |
| 2285 | if (rc) |
| 2286 | goto reset; |
| 2287 | fsg->bulk_in->driver_data = common; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2288 | fsg->bulk_in_enabled = 1; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2289 | |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame] | 2290 | rc = config_ep_by_speed(common->gadget, &(fsg->function), |
| 2291 | fsg->bulk_out); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2292 | if (rc) |
| 2293 | goto reset; |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame] | 2294 | rc = usb_ep_enable(fsg->bulk_out); |
| 2295 | if (rc) |
| 2296 | goto reset; |
| 2297 | fsg->bulk_out->driver_data = common; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2298 | fsg->bulk_out_enabled = 1; |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 2299 | common->bulk_out_maxpacket = usb_endpoint_maxp(fsg->bulk_out->desc); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2300 | clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags); |
| 2301 | |
| 2302 | /* Allocate the requests */ |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2303 | for (i = 0; i < common->fsg_num_buffers; ++i) { |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2304 | struct fsg_buffhd *bh = &common->buffhds[i]; |
| 2305 | |
| 2306 | rc = alloc_request(common, fsg->bulk_in, &bh->inreq); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2307 | if (rc) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2308 | goto reset; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2309 | rc = alloc_request(common, fsg->bulk_out, &bh->outreq); |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2310 | if (rc) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2311 | goto reset; |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2312 | bh->inreq->buf = bh->outreq->buf = bh->buf; |
| 2313 | bh->inreq->context = bh->outreq->context = bh; |
| 2314 | bh->inreq->complete = bulk_in_complete; |
| 2315 | bh->outreq->complete = bulk_out_complete; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2316 | } |
| 2317 | |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2318 | common->running = 1; |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2319 | for (i = 0; i < ARRAY_SIZE(common->luns); ++i) |
Andrzej Pietrasiewicz | 8b903fd | 2013-09-26 14:38:18 +0200 | [diff] [blame] | 2320 | if (common->luns[i]) |
| 2321 | common->luns[i]->unit_attention_data = |
| 2322 | SS_RESET_OCCURRED; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2323 | return rc; |
| 2324 | } |
| 2325 | |
| 2326 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2327 | /****************************** ALT CONFIGS ******************************/ |
| 2328 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2329 | static int fsg_set_alt(struct usb_function *f, unsigned intf, unsigned alt) |
| 2330 | { |
| 2331 | struct fsg_dev *fsg = fsg_from_func(f); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2332 | fsg->common->new_fsg = fsg; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2333 | raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE); |
Roger Quadros | 95ed323 | 2011-05-09 13:08:07 +0300 | [diff] [blame] | 2334 | return USB_GADGET_DELAYED_STATUS; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2335 | } |
| 2336 | |
| 2337 | static void fsg_disable(struct usb_function *f) |
| 2338 | { |
| 2339 | struct fsg_dev *fsg = fsg_from_func(f); |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2340 | fsg->common->new_fsg = NULL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2341 | raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE); |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2342 | } |
| 2343 | |
| 2344 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2345 | /*-------------------------------------------------------------------------*/ |
| 2346 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2347 | static void handle_exception(struct fsg_common *common) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2348 | { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2349 | int i; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2350 | struct fsg_buffhd *bh; |
| 2351 | enum fsg_state old_state; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2352 | struct fsg_lun *curlun; |
| 2353 | unsigned int exception_req_tag; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2354 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2355 | /* |
| 2356 | * Clear the existing signals. Anything but SIGUSR1 is converted |
| 2357 | * into a high-priority EXIT exception. |
| 2358 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2359 | for (;;) { |
Oleg Nesterov | be0e6f2 | 2015-11-06 16:32:22 -0800 | [diff] [blame] | 2360 | int sig = kernel_dequeue_signal(NULL); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2361 | if (!sig) |
| 2362 | break; |
| 2363 | if (sig != SIGUSR1) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2364 | if (common->state < FSG_STATE_EXIT) |
| 2365 | DBG(common, "Main thread exiting on signal\n"); |
| 2366 | raise_exception(common, FSG_STATE_EXIT); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2367 | } |
| 2368 | } |
| 2369 | |
| 2370 | /* Cancel all the pending transfers */ |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2371 | if (likely(common->fsg)) { |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2372 | for (i = 0; i < common->fsg_num_buffers; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2373 | bh = &common->buffhds[i]; |
| 2374 | if (bh->inreq_busy) |
| 2375 | usb_ep_dequeue(common->fsg->bulk_in, bh->inreq); |
| 2376 | if (bh->outreq_busy) |
| 2377 | usb_ep_dequeue(common->fsg->bulk_out, |
| 2378 | bh->outreq); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2379 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2380 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2381 | /* Wait until everything is idle */ |
| 2382 | for (;;) { |
| 2383 | int num_active = 0; |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2384 | for (i = 0; i < common->fsg_num_buffers; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2385 | bh = &common->buffhds[i]; |
| 2386 | num_active += bh->inreq_busy + bh->outreq_busy; |
| 2387 | } |
| 2388 | if (num_active == 0) |
| 2389 | break; |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 2390 | if (sleep_thread(common, true)) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2391 | return; |
| 2392 | } |
| 2393 | |
| 2394 | /* Clear out the controller's fifos */ |
| 2395 | if (common->fsg->bulk_in_enabled) |
| 2396 | usb_ep_fifo_flush(common->fsg->bulk_in); |
| 2397 | if (common->fsg->bulk_out_enabled) |
| 2398 | usb_ep_fifo_flush(common->fsg->bulk_out); |
| 2399 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2400 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2401 | /* |
| 2402 | * Reset the I/O buffer states and pointers, the SCSI |
| 2403 | * state, and the exception. Then invoke the handler. |
| 2404 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2405 | spin_lock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2406 | |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2407 | for (i = 0; i < common->fsg_num_buffers; ++i) { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2408 | bh = &common->buffhds[i]; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2409 | bh->state = BUF_STATE_EMPTY; |
| 2410 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2411 | common->next_buffhd_to_fill = &common->buffhds[0]; |
| 2412 | common->next_buffhd_to_drain = &common->buffhds[0]; |
| 2413 | exception_req_tag = common->exception_req_tag; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2414 | old_state = common->state; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2415 | |
| 2416 | if (old_state == FSG_STATE_ABORT_BULK_OUT) |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2417 | common->state = FSG_STATE_STATUS_PHASE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2418 | else { |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2419 | for (i = 0; i < ARRAY_SIZE(common->luns); ++i) { |
Andrzej Pietrasiewicz | 8b903fd | 2013-09-26 14:38:18 +0200 | [diff] [blame] | 2420 | curlun = common->luns[i]; |
| 2421 | if (!curlun) |
| 2422 | continue; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2423 | curlun->prevent_medium_removal = 0; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 2424 | curlun->sense_data = SS_NO_SENSE; |
| 2425 | curlun->unit_attention_data = SS_NO_SENSE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2426 | curlun->sense_data_info = 0; |
| 2427 | curlun->info_valid = 0; |
| 2428 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2429 | common->state = FSG_STATE_IDLE; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2430 | } |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2431 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2432 | |
| 2433 | /* Carry out any extra actions required for the exception */ |
| 2434 | switch (old_state) { |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2435 | case FSG_STATE_ABORT_BULK_OUT: |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2436 | send_status(common); |
| 2437 | spin_lock_irq(&common->lock); |
| 2438 | if (common->state == FSG_STATE_STATUS_PHASE) |
| 2439 | common->state = FSG_STATE_IDLE; |
| 2440 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2441 | break; |
| 2442 | |
| 2443 | case FSG_STATE_RESET: |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2444 | /* |
| 2445 | * In case we were forced against our will to halt a |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2446 | * bulk endpoint, clear the halt now. (The SuperH UDC |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2447 | * requires this.) |
| 2448 | */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2449 | if (!fsg_is_set(common)) |
| 2450 | break; |
| 2451 | if (test_and_clear_bit(IGNORE_BULK_OUT, |
| 2452 | &common->fsg->atomic_bitflags)) |
| 2453 | usb_ep_clear_halt(common->fsg->bulk_in); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2454 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2455 | if (common->ep0_req_tag == exception_req_tag) |
| 2456 | ep0_queue(common); /* Complete the status stage */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2457 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2458 | /* |
| 2459 | * Technically this should go here, but it would only be |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2460 | * a waste of time. Ditto for the INTERFACE_CHANGE and |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2461 | * CONFIG_CHANGE cases. |
| 2462 | */ |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2463 | /* for (i = 0; i < common->ARRAY_SIZE(common->luns); ++i) */ |
Andrzej Pietrasiewicz | 8b903fd | 2013-09-26 14:38:18 +0200 | [diff] [blame] | 2464 | /* if (common->luns[i]) */ |
| 2465 | /* common->luns[i]->unit_attention_data = */ |
| 2466 | /* SS_RESET_OCCURRED; */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2467 | break; |
| 2468 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2469 | case FSG_STATE_CONFIG_CHANGE: |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2470 | do_set_interface(common, common->new_fsg); |
Roger Quadros | 95ed323 | 2011-05-09 13:08:07 +0300 | [diff] [blame] | 2471 | if (common->new_fsg) |
| 2472 | usb_composite_setup_continue(common->cdev); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2473 | break; |
| 2474 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2475 | case FSG_STATE_EXIT: |
| 2476 | case FSG_STATE_TERMINATED: |
Michal Nazarewicz | b894f60 | 2010-06-25 16:29:28 +0200 | [diff] [blame] | 2477 | do_set_interface(common, NULL); /* Free resources */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2478 | spin_lock_irq(&common->lock); |
| 2479 | common->state = FSG_STATE_TERMINATED; /* Stop the thread */ |
| 2480 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2481 | break; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2482 | |
| 2483 | case FSG_STATE_INTERFACE_CHANGE: |
| 2484 | case FSG_STATE_DISCONNECT: |
| 2485 | case FSG_STATE_COMMAND_PHASE: |
| 2486 | case FSG_STATE_DATA_PHASE: |
| 2487 | case FSG_STATE_STATUS_PHASE: |
| 2488 | case FSG_STATE_IDLE: |
| 2489 | break; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2490 | } |
| 2491 | } |
| 2492 | |
| 2493 | |
| 2494 | /*-------------------------------------------------------------------------*/ |
| 2495 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2496 | static int fsg_main_thread(void *common_) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2497 | { |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2498 | struct fsg_common *common = common_; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2499 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2500 | /* |
| 2501 | * Allow the thread to be killed by a signal, but set the signal mask |
| 2502 | * to block everything but INT, TERM, KILL, and USR1. |
| 2503 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2504 | allow_signal(SIGINT); |
| 2505 | allow_signal(SIGTERM); |
| 2506 | allow_signal(SIGKILL); |
| 2507 | allow_signal(SIGUSR1); |
| 2508 | |
| 2509 | /* Allow the thread to be frozen */ |
| 2510 | set_freezable(); |
| 2511 | |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2512 | /* |
| 2513 | * Arrange for userspace references to be interpreted as kernel |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2514 | * pointers. That way we can pass a kernel pointer to a routine |
Michal Nazarewicz | b73af61 | 2010-10-28 17:31:23 +0200 | [diff] [blame] | 2515 | * that expects a __user pointer and it will work okay. |
| 2516 | */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2517 | set_fs(get_ds()); |
| 2518 | |
| 2519 | /* The main loop */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2520 | while (common->state != FSG_STATE_TERMINATED) { |
| 2521 | if (exception_in_progress(common) || signal_pending(current)) { |
| 2522 | handle_exception(common); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2523 | continue; |
| 2524 | } |
| 2525 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2526 | if (!common->running) { |
George Cherian | 2cf93be | 2013-11-08 10:50:52 +0530 | [diff] [blame] | 2527 | sleep_thread(common, true); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2528 | continue; |
| 2529 | } |
| 2530 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2531 | if (get_next_command(common)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2532 | continue; |
| 2533 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2534 | spin_lock_irq(&common->lock); |
| 2535 | if (!exception_in_progress(common)) |
| 2536 | common->state = FSG_STATE_DATA_PHASE; |
| 2537 | spin_unlock_irq(&common->lock); |
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 | if (do_scsi_command(common) || finish_reply(common)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2540 | continue; |
| 2541 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2542 | spin_lock_irq(&common->lock); |
| 2543 | if (!exception_in_progress(common)) |
| 2544 | common->state = FSG_STATE_STATUS_PHASE; |
| 2545 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2546 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2547 | if (send_status(common)) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2548 | continue; |
| 2549 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2550 | spin_lock_irq(&common->lock); |
| 2551 | if (!exception_in_progress(common)) |
| 2552 | common->state = FSG_STATE_IDLE; |
| 2553 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2554 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2555 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2556 | spin_lock_irq(&common->lock); |
| 2557 | common->thread_task = NULL; |
| 2558 | spin_unlock_irq(&common->lock); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2559 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 2560 | if (!common->ops || !common->ops->thread_exits |
| 2561 | || common->ops->thread_exits(common) < 0) { |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2562 | int i; |
Michal Nazarewicz | 7f1ee82 | 2010-01-28 13:05:26 +0100 | [diff] [blame] | 2563 | |
| 2564 | down_write(&common->filesem); |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2565 | for (i = 0; i < ARRAY_SIZE(common->luns); --i) { |
| 2566 | struct fsg_lun *curlun = common->luns[i]; |
Andrzej Pietrasiewicz | 8b903fd | 2013-09-26 14:38:18 +0200 | [diff] [blame] | 2567 | if (!curlun || !fsg_lun_is_open(curlun)) |
Michal Nazarewicz | 7f1ee82 | 2010-01-28 13:05:26 +0100 | [diff] [blame] | 2568 | continue; |
| 2569 | |
| 2570 | fsg_lun_close(curlun); |
| 2571 | curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT; |
| 2572 | } |
| 2573 | up_write(&common->filesem); |
| 2574 | } |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2575 | |
Michal Nazarewicz | 00cb636 | 2010-10-28 17:31:22 +0200 | [diff] [blame] | 2576 | /* Let fsg_unbind() know the thread has exited */ |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2577 | complete_and_exit(&common->thread_notifier, 0); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2578 | } |
| 2579 | |
| 2580 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2581 | /*************************** DEVICE ATTRIBUTES ***************************/ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2582 | |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2583 | static ssize_t ro_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 2584 | { |
Andrzej Pietrasiewicz | 77850ae | 2013-10-09 10:06:03 +0200 | [diff] [blame] | 2585 | struct fsg_lun *curlun = fsg_lun_from_dev(dev); |
| 2586 | |
| 2587 | return fsg_show_ro(curlun, buf); |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2588 | } |
| 2589 | |
| 2590 | static ssize_t nofua_show(struct device *dev, struct device_attribute *attr, |
| 2591 | char *buf) |
| 2592 | { |
Andrzej Pietrasiewicz | 77850ae | 2013-10-09 10:06:03 +0200 | [diff] [blame] | 2593 | struct fsg_lun *curlun = fsg_lun_from_dev(dev); |
| 2594 | |
| 2595 | return fsg_show_nofua(curlun, buf); |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2596 | } |
| 2597 | |
| 2598 | static ssize_t file_show(struct device *dev, struct device_attribute *attr, |
| 2599 | char *buf) |
| 2600 | { |
Andrzej Pietrasiewicz | 77850ae | 2013-10-09 10:06:03 +0200 | [diff] [blame] | 2601 | struct fsg_lun *curlun = fsg_lun_from_dev(dev); |
| 2602 | struct rw_semaphore *filesem = dev_get_drvdata(dev); |
| 2603 | |
| 2604 | return fsg_show_file(curlun, filesem, buf); |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2605 | } |
| 2606 | |
| 2607 | static ssize_t ro_store(struct device *dev, struct device_attribute *attr, |
| 2608 | const char *buf, size_t count) |
| 2609 | { |
Andrzej Pietrasiewicz | 77850ae | 2013-10-09 10:06:03 +0200 | [diff] [blame] | 2610 | struct fsg_lun *curlun = fsg_lun_from_dev(dev); |
| 2611 | struct rw_semaphore *filesem = dev_get_drvdata(dev); |
| 2612 | |
| 2613 | return fsg_store_ro(curlun, filesem, buf, count); |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2614 | } |
| 2615 | |
| 2616 | static ssize_t nofua_store(struct device *dev, struct device_attribute *attr, |
| 2617 | const char *buf, size_t count) |
| 2618 | { |
Andrzej Pietrasiewicz | 77850ae | 2013-10-09 10:06:03 +0200 | [diff] [blame] | 2619 | struct fsg_lun *curlun = fsg_lun_from_dev(dev); |
| 2620 | |
| 2621 | return fsg_store_nofua(curlun, buf, count); |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2622 | } |
| 2623 | |
| 2624 | static ssize_t file_store(struct device *dev, struct device_attribute *attr, |
| 2625 | const char *buf, size_t count) |
| 2626 | { |
Andrzej Pietrasiewicz | 77850ae | 2013-10-09 10:06:03 +0200 | [diff] [blame] | 2627 | struct fsg_lun *curlun = fsg_lun_from_dev(dev); |
| 2628 | struct rw_semaphore *filesem = dev_get_drvdata(dev); |
| 2629 | |
| 2630 | return fsg_store_file(curlun, filesem, buf, count); |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 2631 | } |
| 2632 | |
Greg Kroah-Hartman | ce26bd2 | 2013-08-23 16:34:43 -0700 | [diff] [blame] | 2633 | static DEVICE_ATTR_RW(nofua); |
Takashi Iwai | c7b364f | 2015-02-05 14:36:25 +0100 | [diff] [blame] | 2634 | /* mode wil be set in fsg_lun_attr_is_visible() */ |
| 2635 | static DEVICE_ATTR(ro, 0, ro_show, ro_store); |
| 2636 | static DEVICE_ATTR(file, 0, file_show, file_store); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2637 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2638 | /****************************** FSG COMMON ******************************/ |
| 2639 | |
| 2640 | static void fsg_common_release(struct kref *ref); |
| 2641 | |
| 2642 | static void fsg_lun_release(struct device *dev) |
| 2643 | { |
| 2644 | /* Nothing needs to be done */ |
| 2645 | } |
| 2646 | |
Andrzej Pietrasiewicz | f3fed36 | 2013-09-26 14:38:17 +0200 | [diff] [blame] | 2647 | void fsg_common_get(struct fsg_common *common) |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2648 | { |
| 2649 | kref_get(&common->ref); |
| 2650 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2651 | EXPORT_SYMBOL_GPL(fsg_common_get); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2652 | |
Andrzej Pietrasiewicz | f3fed36 | 2013-09-26 14:38:17 +0200 | [diff] [blame] | 2653 | void fsg_common_put(struct fsg_common *common) |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2654 | { |
| 2655 | kref_put(&common->ref, fsg_common_release); |
| 2656 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2657 | EXPORT_SYMBOL_GPL(fsg_common_put); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2658 | |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2659 | static struct fsg_common *fsg_common_setup(struct fsg_common *common) |
Andrzej Pietrasiewicz | b24650d | 2013-10-09 10:05:54 +0200 | [diff] [blame] | 2660 | { |
| 2661 | if (!common) { |
| 2662 | common = kzalloc(sizeof(*common), GFP_KERNEL); |
| 2663 | if (!common) |
| 2664 | return ERR_PTR(-ENOMEM); |
| 2665 | common->free_storage_on_release = 1; |
| 2666 | } else { |
Andrzej Pietrasiewicz | b24650d | 2013-10-09 10:05:54 +0200 | [diff] [blame] | 2667 | common->free_storage_on_release = 0; |
| 2668 | } |
| 2669 | init_rwsem(&common->filesem); |
| 2670 | spin_lock_init(&common->lock); |
| 2671 | kref_init(&common->ref); |
| 2672 | init_completion(&common->thread_notifier); |
| 2673 | init_waitqueue_head(&common->fsg_wait); |
| 2674 | common->state = FSG_STATE_TERMINATED; |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2675 | memset(common->luns, 0, sizeof(common->luns)); |
Andrzej Pietrasiewicz | b24650d | 2013-10-09 10:05:54 +0200 | [diff] [blame] | 2676 | |
| 2677 | return common; |
| 2678 | } |
| 2679 | |
Andrzej Pietrasiewicz | bd528d4 | 2013-10-09 10:05:53 +0200 | [diff] [blame] | 2680 | void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs) |
| 2681 | { |
| 2682 | common->sysfs = sysfs; |
| 2683 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2684 | EXPORT_SYMBOL_GPL(fsg_common_set_sysfs); |
Andrzej Pietrasiewicz | bd528d4 | 2013-10-09 10:05:53 +0200 | [diff] [blame] | 2685 | |
Andrzej Pietrasiewicz | 8502d66 | 2013-10-09 10:05:52 +0200 | [diff] [blame] | 2686 | static void _fsg_common_free_buffers(struct fsg_buffhd *buffhds, unsigned n) |
| 2687 | { |
| 2688 | if (buffhds) { |
| 2689 | struct fsg_buffhd *bh = buffhds; |
| 2690 | while (n--) { |
| 2691 | kfree(bh->buf); |
| 2692 | ++bh; |
| 2693 | } |
| 2694 | kfree(buffhds); |
| 2695 | } |
| 2696 | } |
| 2697 | |
Andrzej Pietrasiewicz | 6313caa | 2013-10-09 10:05:55 +0200 | [diff] [blame] | 2698 | int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n) |
| 2699 | { |
| 2700 | struct fsg_buffhd *bh, *buffhds; |
Felipe Balbi | fe5a6c4 | 2016-05-12 16:06:41 +0300 | [diff] [blame] | 2701 | int i; |
Andrzej Pietrasiewicz | 6313caa | 2013-10-09 10:05:55 +0200 | [diff] [blame] | 2702 | |
| 2703 | buffhds = kcalloc(n, sizeof(*buffhds), GFP_KERNEL); |
| 2704 | if (!buffhds) |
| 2705 | return -ENOMEM; |
| 2706 | |
| 2707 | /* Data buffers cyclic list */ |
| 2708 | bh = buffhds; |
| 2709 | i = n; |
| 2710 | goto buffhds_first_it; |
| 2711 | do { |
| 2712 | bh->next = bh + 1; |
| 2713 | ++bh; |
| 2714 | buffhds_first_it: |
| 2715 | bh->buf = kmalloc(FSG_BUFLEN, GFP_KERNEL); |
| 2716 | if (unlikely(!bh->buf)) |
| 2717 | goto error_release; |
| 2718 | } while (--i); |
| 2719 | bh->next = buffhds; |
| 2720 | |
| 2721 | _fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers); |
| 2722 | common->fsg_num_buffers = n; |
| 2723 | common->buffhds = buffhds; |
| 2724 | |
| 2725 | return 0; |
| 2726 | |
| 2727 | error_release: |
| 2728 | /* |
| 2729 | * "buf"s pointed to by heads after n - i are NULL |
| 2730 | * so releasing them won't hurt |
| 2731 | */ |
| 2732 | _fsg_common_free_buffers(buffhds, n); |
| 2733 | |
| 2734 | return -ENOMEM; |
| 2735 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2736 | EXPORT_SYMBOL_GPL(fsg_common_set_num_buffers); |
Andrzej Pietrasiewicz | 6313caa | 2013-10-09 10:05:55 +0200 | [diff] [blame] | 2737 | |
Krzysztof Opasiak | 5542f58 | 2015-07-31 13:37:45 +0200 | [diff] [blame] | 2738 | void fsg_common_remove_lun(struct fsg_lun *lun) |
Andrzej Pietrasiewicz | 7063417 | 2013-10-09 10:05:56 +0200 | [diff] [blame] | 2739 | { |
Krzysztof Opasiak | 5542f58 | 2015-07-31 13:37:45 +0200 | [diff] [blame] | 2740 | if (device_is_registered(&lun->dev)) |
Andrzej Pietrasiewicz | 7063417 | 2013-10-09 10:05:56 +0200 | [diff] [blame] | 2741 | device_unregister(&lun->dev); |
Andrzej Pietrasiewicz | 7063417 | 2013-10-09 10:05:56 +0200 | [diff] [blame] | 2742 | fsg_lun_close(lun); |
| 2743 | kfree(lun); |
| 2744 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2745 | EXPORT_SYMBOL_GPL(fsg_common_remove_lun); |
Andrzej Pietrasiewicz | 7063417 | 2013-10-09 10:05:56 +0200 | [diff] [blame] | 2746 | |
| 2747 | static void _fsg_common_remove_luns(struct fsg_common *common, int n) |
| 2748 | { |
| 2749 | int i; |
| 2750 | |
| 2751 | for (i = 0; i < n; ++i) |
| 2752 | if (common->luns[i]) { |
Krzysztof Opasiak | 5542f58 | 2015-07-31 13:37:45 +0200 | [diff] [blame] | 2753 | fsg_common_remove_lun(common->luns[i]); |
Andrzej Pietrasiewicz | 7063417 | 2013-10-09 10:05:56 +0200 | [diff] [blame] | 2754 | common->luns[i] = NULL; |
| 2755 | } |
| 2756 | } |
| 2757 | |
| 2758 | void fsg_common_remove_luns(struct fsg_common *common) |
| 2759 | { |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2760 | _fsg_common_remove_luns(common, ARRAY_SIZE(common->luns)); |
Andrzej Pietrasiewicz | 7063417 | 2013-10-09 10:05:56 +0200 | [diff] [blame] | 2761 | } |
Krzysztof Opasiak | bab7a1f | 2015-07-20 20:15:18 +0200 | [diff] [blame] | 2762 | EXPORT_SYMBOL_GPL(fsg_common_remove_luns); |
Andrzej Pietrasiewicz | 7063417 | 2013-10-09 10:05:56 +0200 | [diff] [blame] | 2763 | |
Andrzej Pietrasiewicz | 2412fbf | 2013-10-09 10:06:02 +0200 | [diff] [blame] | 2764 | void fsg_common_set_ops(struct fsg_common *common, |
| 2765 | const struct fsg_operations *ops) |
| 2766 | { |
| 2767 | common->ops = ops; |
| 2768 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2769 | EXPORT_SYMBOL_GPL(fsg_common_set_ops); |
Andrzej Pietrasiewicz | 2412fbf | 2013-10-09 10:06:02 +0200 | [diff] [blame] | 2770 | |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 2771 | void fsg_common_free_buffers(struct fsg_common *common) |
| 2772 | { |
| 2773 | _fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers); |
| 2774 | common->buffhds = NULL; |
| 2775 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2776 | EXPORT_SYMBOL_GPL(fsg_common_free_buffers); |
Andrzej Pietrasiewicz | 7063417 | 2013-10-09 10:05:56 +0200 | [diff] [blame] | 2777 | |
Andrzej Pietrasiewicz | a891d7a | 2013-10-09 10:05:57 +0200 | [diff] [blame] | 2778 | int fsg_common_set_cdev(struct fsg_common *common, |
| 2779 | struct usb_composite_dev *cdev, bool can_stall) |
| 2780 | { |
| 2781 | struct usb_string *us; |
| 2782 | |
| 2783 | common->gadget = cdev->gadget; |
| 2784 | common->ep0 = cdev->gadget->ep0; |
| 2785 | common->ep0req = cdev->req; |
| 2786 | common->cdev = cdev; |
| 2787 | |
| 2788 | us = usb_gstrings_attach(cdev, fsg_strings_array, |
| 2789 | ARRAY_SIZE(fsg_strings)); |
| 2790 | if (IS_ERR(us)) |
| 2791 | return PTR_ERR(us); |
| 2792 | |
| 2793 | fsg_intf_desc.iInterface = us[FSG_STRING_INTERFACE].id; |
| 2794 | |
| 2795 | /* |
| 2796 | * Some peripheral controllers are known not to be able to |
| 2797 | * halt bulk endpoints correctly. If one of them is present, |
| 2798 | * disable stalls. |
| 2799 | */ |
Robert Baldyga | a4cc421 | 2015-07-28 07:20:01 +0200 | [diff] [blame] | 2800 | common->can_stall = can_stall && |
| 2801 | gadget_is_stall_supported(common->gadget); |
Andrzej Pietrasiewicz | a891d7a | 2013-10-09 10:05:57 +0200 | [diff] [blame] | 2802 | |
| 2803 | return 0; |
| 2804 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2805 | EXPORT_SYMBOL_GPL(fsg_common_set_cdev); |
Andrzej Pietrasiewicz | a891d7a | 2013-10-09 10:05:57 +0200 | [diff] [blame] | 2806 | |
Takashi Iwai | c7b364f | 2015-02-05 14:36:25 +0100 | [diff] [blame] | 2807 | static struct attribute *fsg_lun_dev_attrs[] = { |
| 2808 | &dev_attr_ro.attr, |
| 2809 | &dev_attr_file.attr, |
| 2810 | &dev_attr_nofua.attr, |
| 2811 | NULL |
| 2812 | }; |
| 2813 | |
| 2814 | static umode_t fsg_lun_dev_is_visible(struct kobject *kobj, |
| 2815 | struct attribute *attr, int idx) |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2816 | { |
Takashi Iwai | c7b364f | 2015-02-05 14:36:25 +0100 | [diff] [blame] | 2817 | struct device *dev = kobj_to_dev(kobj); |
| 2818 | struct fsg_lun *lun = fsg_lun_from_dev(dev); |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2819 | |
Takashi Iwai | c7b364f | 2015-02-05 14:36:25 +0100 | [diff] [blame] | 2820 | if (attr == &dev_attr_ro.attr) |
| 2821 | return lun->cdrom ? S_IRUGO : (S_IWUSR | S_IRUGO); |
| 2822 | if (attr == &dev_attr_file.attr) |
| 2823 | return lun->removable ? (S_IWUSR | S_IRUGO) : S_IRUGO; |
| 2824 | return attr->mode; |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2825 | } |
| 2826 | |
Takashi Iwai | c7b364f | 2015-02-05 14:36:25 +0100 | [diff] [blame] | 2827 | static const struct attribute_group fsg_lun_dev_group = { |
| 2828 | .attrs = fsg_lun_dev_attrs, |
| 2829 | .is_visible = fsg_lun_dev_is_visible, |
| 2830 | }; |
| 2831 | |
| 2832 | static const struct attribute_group *fsg_lun_dev_groups[] = { |
| 2833 | &fsg_lun_dev_group, |
| 2834 | NULL |
| 2835 | }; |
| 2836 | |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2837 | int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg, |
| 2838 | unsigned int id, const char *name, |
| 2839 | const char **name_pfx) |
| 2840 | { |
| 2841 | struct fsg_lun *lun; |
| 2842 | char *pathbuf, *p; |
| 2843 | int rc = -ENOMEM; |
| 2844 | |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2845 | if (id >= ARRAY_SIZE(common->luns)) |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2846 | return -ENODEV; |
| 2847 | |
| 2848 | if (common->luns[id]) |
| 2849 | return -EBUSY; |
| 2850 | |
| 2851 | if (!cfg->filename && !cfg->removable) { |
| 2852 | pr_err("no file given for LUN%d\n", id); |
| 2853 | return -EINVAL; |
| 2854 | } |
| 2855 | |
| 2856 | lun = kzalloc(sizeof(*lun), GFP_KERNEL); |
| 2857 | if (!lun) |
| 2858 | return -ENOMEM; |
| 2859 | |
| 2860 | lun->name_pfx = name_pfx; |
| 2861 | |
| 2862 | lun->cdrom = !!cfg->cdrom; |
| 2863 | lun->ro = cfg->cdrom || cfg->ro; |
| 2864 | lun->initially_ro = lun->ro; |
| 2865 | lun->removable = !!cfg->removable; |
| 2866 | |
| 2867 | if (!common->sysfs) { |
| 2868 | /* we DON'T own the name!*/ |
| 2869 | lun->name = name; |
| 2870 | } else { |
| 2871 | lun->dev.release = fsg_lun_release; |
| 2872 | lun->dev.parent = &common->gadget->dev; |
Takashi Iwai | c7b364f | 2015-02-05 14:36:25 +0100 | [diff] [blame] | 2873 | lun->dev.groups = fsg_lun_dev_groups; |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2874 | dev_set_drvdata(&lun->dev, &common->filesem); |
Andrzej Pietrasiewicz | a1924d8 | 2013-10-25 09:09:27 +0200 | [diff] [blame] | 2875 | dev_set_name(&lun->dev, "%s", name); |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2876 | lun->name = dev_name(&lun->dev); |
| 2877 | |
Takashi Iwai | c7b364f | 2015-02-05 14:36:25 +0100 | [diff] [blame] | 2878 | rc = device_register(&lun->dev); |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2879 | if (rc) { |
| 2880 | pr_info("failed to register LUN%d: %d\n", id, rc); |
Takashi Iwai | c7b364f | 2015-02-05 14:36:25 +0100 | [diff] [blame] | 2881 | put_device(&lun->dev); |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2882 | goto error_sysfs; |
| 2883 | } |
| 2884 | } |
| 2885 | |
| 2886 | common->luns[id] = lun; |
| 2887 | |
| 2888 | if (cfg->filename) { |
| 2889 | rc = fsg_lun_open(lun, cfg->filename); |
| 2890 | if (rc) |
| 2891 | goto error_lun; |
| 2892 | } |
| 2893 | |
| 2894 | pathbuf = kmalloc(PATH_MAX, GFP_KERNEL); |
| 2895 | p = "(no medium)"; |
| 2896 | if (fsg_lun_is_open(lun)) { |
| 2897 | p = "(error)"; |
| 2898 | if (pathbuf) { |
Miklos Szeredi | 9bf39ab | 2015-06-19 10:29:13 +0200 | [diff] [blame] | 2899 | p = file_path(lun->filp, pathbuf, PATH_MAX); |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2900 | if (IS_ERR(p)) |
| 2901 | p = "(error)"; |
| 2902 | } |
| 2903 | } |
| 2904 | pr_info("LUN: %s%s%sfile: %s\n", |
| 2905 | lun->removable ? "removable " : "", |
| 2906 | lun->ro ? "read only " : "", |
| 2907 | lun->cdrom ? "CD-ROM " : "", |
| 2908 | p); |
| 2909 | kfree(pathbuf); |
| 2910 | |
| 2911 | return 0; |
| 2912 | |
| 2913 | error_lun: |
Krzysztof Opasiak | 5542f58 | 2015-07-31 13:37:45 +0200 | [diff] [blame] | 2914 | if (device_is_registered(&lun->dev)) |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2915 | device_unregister(&lun->dev); |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2916 | fsg_lun_close(lun); |
| 2917 | common->luns[id] = NULL; |
| 2918 | error_sysfs: |
| 2919 | kfree(lun); |
| 2920 | return rc; |
| 2921 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2922 | EXPORT_SYMBOL_GPL(fsg_common_create_lun); |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2923 | |
| 2924 | int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg) |
| 2925 | { |
| 2926 | char buf[8]; /* enough for 100000000 different numbers, decimal */ |
| 2927 | int i, rc; |
| 2928 | |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2929 | fsg_common_remove_luns(common); |
| 2930 | |
| 2931 | for (i = 0; i < cfg->nluns; ++i) { |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2932 | snprintf(buf, sizeof(buf), "lun%d", i); |
| 2933 | rc = fsg_common_create_lun(common, &cfg->luns[i], i, buf, NULL); |
| 2934 | if (rc) |
| 2935 | goto fail; |
| 2936 | } |
| 2937 | |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2938 | pr_info("Number of LUNs=%d\n", cfg->nluns); |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2939 | |
| 2940 | return 0; |
| 2941 | |
| 2942 | fail: |
| 2943 | _fsg_common_remove_luns(common, i); |
| 2944 | return rc; |
| 2945 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2946 | EXPORT_SYMBOL_GPL(fsg_common_create_luns); |
Andrzej Pietrasiewicz | b27c08c | 2013-10-09 10:05:58 +0200 | [diff] [blame] | 2947 | |
Andrzej Pietrasiewicz | 23682e3 | 2013-10-09 10:05:59 +0200 | [diff] [blame] | 2948 | void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn, |
| 2949 | const char *pn) |
| 2950 | { |
| 2951 | int i; |
| 2952 | |
| 2953 | /* Prepare inquiryString */ |
| 2954 | i = get_default_bcdDevice(); |
| 2955 | snprintf(common->inquiry_string, sizeof(common->inquiry_string), |
| 2956 | "%-8s%-16s%04x", vn ?: "Linux", |
| 2957 | /* Assume product name dependent on the first LUN */ |
| 2958 | pn ?: ((*common->luns)->cdrom |
| 2959 | ? "File-CD Gadget" |
| 2960 | : "File-Stor Gadget"), |
| 2961 | i); |
| 2962 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 2963 | EXPORT_SYMBOL_GPL(fsg_common_set_inquiry_string); |
Andrzej Pietrasiewicz | 23682e3 | 2013-10-09 10:05:59 +0200 | [diff] [blame] | 2964 | |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2965 | static void fsg_common_release(struct kref *ref) |
| 2966 | { |
Michal Nazarewicz | b9e0008 | 2010-05-12 12:51:13 +0200 | [diff] [blame] | 2967 | struct fsg_common *common = container_of(ref, struct fsg_common, ref); |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2968 | int i; |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2969 | |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2970 | /* If the thread isn't already dead, tell it to exit now */ |
| 2971 | if (common->state != FSG_STATE_TERMINATED) { |
| 2972 | raise_exception(common, FSG_STATE_EXIT); |
| 2973 | wait_for_completion(&common->thread_notifier); |
Michal Nazarewicz | f78bbca | 2016-04-08 10:24:11 +0200 | [diff] [blame] | 2974 | common->thread_task = NULL; |
Michal Nazarewicz | 8ea864c | 2009-11-09 14:15:24 +0100 | [diff] [blame] | 2975 | } |
| 2976 | |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2977 | for (i = 0; i < ARRAY_SIZE(common->luns); ++i) { |
| 2978 | struct fsg_lun *lun = common->luns[i]; |
| 2979 | if (!lun) |
| 2980 | continue; |
| 2981 | fsg_lun_close(lun); |
Krzysztof Opasiak | 5542f58 | 2015-07-31 13:37:45 +0200 | [diff] [blame] | 2982 | if (device_is_registered(&lun->dev)) |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2983 | device_unregister(&lun->dev); |
| 2984 | kfree(lun); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2985 | } |
| 2986 | |
Andrzej Pietrasiewicz | 8502d66 | 2013-10-09 10:05:52 +0200 | [diff] [blame] | 2987 | _fsg_common_free_buffers(common->buffhds, common->fsg_num_buffers); |
Michal Nazarewicz | 9c61021 | 2009-10-28 16:57:22 +0100 | [diff] [blame] | 2988 | if (common->free_storage_on_release) |
| 2989 | kfree(common); |
| 2990 | } |
| 2991 | |
| 2992 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2993 | /*-------------------------------------------------------------------------*/ |
| 2994 | |
Michal Nazarewicz | 28824b1 | 2010-05-05 12:53:13 +0200 | [diff] [blame] | 2995 | static int fsg_bind(struct usb_configuration *c, struct usb_function *f) |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 2996 | { |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2997 | struct fsg_dev *fsg = fsg_from_func(f); |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 2998 | struct fsg_common *common = fsg->common; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 2999 | struct usb_gadget *gadget = c->cdev->gadget; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3000 | int i; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3001 | struct usb_ep *ep; |
Sebastian Andrzej Siewior | 10287ba | 2012-10-22 22:15:06 +0200 | [diff] [blame] | 3002 | unsigned max_burst; |
| 3003 | int ret; |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3004 | struct fsg_opts *opts; |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 3005 | |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 3006 | /* Don't allow to bind if we don't have at least one LUN */ |
| 3007 | ret = _fsg_common_get_max_lun(common); |
| 3008 | if (ret < 0) { |
| 3009 | pr_err("There should be at least one LUN.\n"); |
| 3010 | return -EINVAL; |
| 3011 | } |
| 3012 | |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3013 | opts = fsg_opts_from_func_inst(f->fi); |
| 3014 | if (!opts->no_configfs) { |
| 3015 | ret = fsg_common_set_cdev(fsg->common, c->cdev, |
| 3016 | fsg->common->can_stall); |
| 3017 | if (ret) |
| 3018 | return ret; |
Felipe Balbi | f91d2f4 | 2013-11-25 11:07:46 -0600 | [diff] [blame] | 3019 | fsg_common_set_inquiry_string(fsg->common, NULL, NULL); |
Michal Nazarewicz | f78bbca | 2016-04-08 10:24:11 +0200 | [diff] [blame] | 3020 | } |
| 3021 | |
| 3022 | if (!common->thread_task) { |
| 3023 | common->state = FSG_STATE_IDLE; |
| 3024 | common->thread_task = |
| 3025 | kthread_create(fsg_main_thread, common, "file-storage"); |
| 3026 | if (IS_ERR(common->thread_task)) { |
| 3027 | int ret = PTR_ERR(common->thread_task); |
| 3028 | common->thread_task = NULL; |
| 3029 | common->state = FSG_STATE_TERMINATED; |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3030 | return ret; |
Michal Nazarewicz | f78bbca | 2016-04-08 10:24:11 +0200 | [diff] [blame] | 3031 | } |
| 3032 | DBG(common, "I/O thread pid: %d\n", |
| 3033 | task_pid_nr(common->thread_task)); |
| 3034 | wake_up_process(common->thread_task); |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3035 | } |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3036 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3037 | fsg->gadget = gadget; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3038 | |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3039 | /* New interface */ |
| 3040 | i = usb_interface_id(c, f); |
| 3041 | if (i < 0) |
Sanjay Singh Rawat | 8078f31 | 2015-07-22 16:29:46 +0530 | [diff] [blame] | 3042 | goto fail; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 3043 | fsg_intf_desc.bInterfaceNumber = i; |
| 3044 | fsg->interface_number = i; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3045 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3046 | /* Find all the endpoints we will use */ |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3047 | ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc); |
| 3048 | if (!ep) |
| 3049 | goto autoconf_fail; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3050 | fsg->bulk_in = ep; |
| 3051 | |
| 3052 | ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc); |
| 3053 | if (!ep) |
| 3054 | goto autoconf_fail; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3055 | fsg->bulk_out = ep; |
| 3056 | |
Sebastian Andrzej Siewior | 10287ba | 2012-10-22 22:15:06 +0200 | [diff] [blame] | 3057 | /* Assume endpoint addresses are the same for both speeds */ |
| 3058 | fsg_hs_bulk_in_desc.bEndpointAddress = |
| 3059 | fsg_fs_bulk_in_desc.bEndpointAddress; |
| 3060 | fsg_hs_bulk_out_desc.bEndpointAddress = |
| 3061 | fsg_fs_bulk_out_desc.bEndpointAddress; |
Michal Nazarewicz | e5fd39d | 2010-06-25 16:29:26 +0200 | [diff] [blame] | 3062 | |
Sebastian Andrzej Siewior | 10287ba | 2012-10-22 22:15:06 +0200 | [diff] [blame] | 3063 | /* Calculate bMaxBurst, we know packet size is 1024 */ |
| 3064 | max_burst = min_t(unsigned, FSG_BUFLEN / 1024, 15); |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3065 | |
Sebastian Andrzej Siewior | 10287ba | 2012-10-22 22:15:06 +0200 | [diff] [blame] | 3066 | fsg_ss_bulk_in_desc.bEndpointAddress = |
| 3067 | fsg_fs_bulk_in_desc.bEndpointAddress; |
| 3068 | fsg_ss_bulk_in_comp_desc.bMaxBurst = max_burst; |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 3069 | |
Sebastian Andrzej Siewior | 10287ba | 2012-10-22 22:15:06 +0200 | [diff] [blame] | 3070 | fsg_ss_bulk_out_desc.bEndpointAddress = |
| 3071 | fsg_fs_bulk_out_desc.bEndpointAddress; |
| 3072 | fsg_ss_bulk_out_comp_desc.bMaxBurst = max_burst; |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 3073 | |
Sebastian Andrzej Siewior | 10287ba | 2012-10-22 22:15:06 +0200 | [diff] [blame] | 3074 | ret = usb_assign_descriptors(f, fsg_fs_function, fsg_hs_function, |
John Youn | 59a3ced | 2016-02-05 17:07:58 -0800 | [diff] [blame] | 3075 | fsg_ss_function, fsg_ss_function); |
Sebastian Andrzej Siewior | 10287ba | 2012-10-22 22:15:06 +0200 | [diff] [blame] | 3076 | if (ret) |
| 3077 | goto autoconf_fail; |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 3078 | |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3079 | return 0; |
| 3080 | |
| 3081 | autoconf_fail: |
| 3082 | ERROR(fsg, "unable to autoconfigure all endpoints\n"); |
Sanjay Singh Rawat | 8078f31 | 2015-07-22 16:29:46 +0530 | [diff] [blame] | 3083 | i = -ENOTSUPP; |
| 3084 | fail: |
| 3085 | /* terminate the thread */ |
| 3086 | if (fsg->common->state != FSG_STATE_TERMINATED) { |
| 3087 | raise_exception(fsg->common, FSG_STATE_EXIT); |
| 3088 | wait_for_completion(&fsg->common->thread_notifier); |
| 3089 | } |
| 3090 | return i; |
Michal Nazarewicz | d5e2b67 | 2009-10-28 16:57:18 +0100 | [diff] [blame] | 3091 | } |
| 3092 | |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3093 | /****************************** ALLOCATE FUNCTION *************************/ |
| 3094 | |
| 3095 | static void fsg_unbind(struct usb_configuration *c, struct usb_function *f) |
| 3096 | { |
| 3097 | struct fsg_dev *fsg = fsg_from_func(f); |
| 3098 | struct fsg_common *common = fsg->common; |
| 3099 | |
| 3100 | DBG(fsg, "unbind\n"); |
| 3101 | if (fsg->common->fsg == fsg) { |
| 3102 | fsg->common->new_fsg = NULL; |
| 3103 | raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE); |
| 3104 | /* FIXME: make interruptible or killable somehow? */ |
| 3105 | wait_event(common->fsg_wait, common->fsg != fsg); |
| 3106 | } |
| 3107 | |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3108 | usb_free_all_descriptors(&fsg->function); |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3109 | } |
| 3110 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3111 | static inline struct fsg_lun_opts *to_fsg_lun_opts(struct config_item *item) |
| 3112 | { |
| 3113 | return container_of(to_config_group(item), struct fsg_lun_opts, group); |
| 3114 | } |
| 3115 | |
| 3116 | static inline struct fsg_opts *to_fsg_opts(struct config_item *item) |
| 3117 | { |
| 3118 | return container_of(to_config_group(item), struct fsg_opts, |
| 3119 | func_inst.group); |
| 3120 | } |
| 3121 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3122 | static void fsg_lun_attr_release(struct config_item *item) |
| 3123 | { |
| 3124 | struct fsg_lun_opts *lun_opts; |
| 3125 | |
| 3126 | lun_opts = to_fsg_lun_opts(item); |
| 3127 | kfree(lun_opts); |
| 3128 | } |
| 3129 | |
| 3130 | static struct configfs_item_operations fsg_lun_item_ops = { |
Andrzej Pietrasiewicz | 5bb7289 | 2013-10-16 08:34:51 +0200 | [diff] [blame] | 3131 | .release = fsg_lun_attr_release, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3132 | }; |
| 3133 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3134 | static ssize_t fsg_lun_opts_file_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3135 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3136 | struct fsg_lun_opts *opts = to_fsg_lun_opts(item); |
| 3137 | struct fsg_opts *fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3138 | |
| 3139 | return fsg_show_file(opts->lun, &fsg_opts->common->filesem, page); |
| 3140 | } |
| 3141 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3142 | static ssize_t fsg_lun_opts_file_store(struct config_item *item, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3143 | const char *page, size_t len) |
| 3144 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3145 | struct fsg_lun_opts *opts = to_fsg_lun_opts(item); |
| 3146 | struct fsg_opts *fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3147 | |
| 3148 | return fsg_store_file(opts->lun, &fsg_opts->common->filesem, page, len); |
| 3149 | } |
| 3150 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3151 | CONFIGFS_ATTR(fsg_lun_opts_, file); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3152 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3153 | static ssize_t fsg_lun_opts_ro_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3154 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3155 | return fsg_show_ro(to_fsg_lun_opts(item)->lun, page); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3156 | } |
| 3157 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3158 | static ssize_t fsg_lun_opts_ro_store(struct config_item *item, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3159 | const char *page, size_t len) |
| 3160 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3161 | struct fsg_lun_opts *opts = to_fsg_lun_opts(item); |
| 3162 | struct fsg_opts *fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3163 | |
| 3164 | return fsg_store_ro(opts->lun, &fsg_opts->common->filesem, page, len); |
| 3165 | } |
| 3166 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3167 | CONFIGFS_ATTR(fsg_lun_opts_, ro); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3168 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3169 | static ssize_t fsg_lun_opts_removable_show(struct config_item *item, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3170 | char *page) |
| 3171 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3172 | return fsg_show_removable(to_fsg_lun_opts(item)->lun, page); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3173 | } |
| 3174 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3175 | static ssize_t fsg_lun_opts_removable_store(struct config_item *item, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3176 | const char *page, size_t len) |
| 3177 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3178 | return fsg_store_removable(to_fsg_lun_opts(item)->lun, page, len); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3179 | } |
| 3180 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3181 | CONFIGFS_ATTR(fsg_lun_opts_, removable); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3182 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3183 | static ssize_t fsg_lun_opts_cdrom_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3184 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3185 | return fsg_show_cdrom(to_fsg_lun_opts(item)->lun, page); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3186 | } |
| 3187 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3188 | static ssize_t fsg_lun_opts_cdrom_store(struct config_item *item, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3189 | const char *page, size_t len) |
| 3190 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3191 | struct fsg_lun_opts *opts = to_fsg_lun_opts(item); |
| 3192 | struct fsg_opts *fsg_opts = to_fsg_opts(opts->group.cg_item.ci_parent); |
Andrzej Pietrasiewicz | b879863 | 2013-10-15 08:33:13 +0200 | [diff] [blame] | 3193 | |
| 3194 | return fsg_store_cdrom(opts->lun, &fsg_opts->common->filesem, page, |
| 3195 | len); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3196 | } |
| 3197 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3198 | CONFIGFS_ATTR(fsg_lun_opts_, cdrom); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3199 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3200 | static ssize_t fsg_lun_opts_nofua_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3201 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3202 | return fsg_show_nofua(to_fsg_lun_opts(item)->lun, page); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3203 | } |
| 3204 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3205 | static ssize_t fsg_lun_opts_nofua_store(struct config_item *item, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3206 | const char *page, size_t len) |
| 3207 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3208 | return fsg_store_nofua(to_fsg_lun_opts(item)->lun, page, len); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3209 | } |
| 3210 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3211 | CONFIGFS_ATTR(fsg_lun_opts_, nofua); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3212 | |
Philipp Gesang | 6ac4709 | 2016-08-01 17:04:19 +0200 | [diff] [blame] | 3213 | static ssize_t fsg_lun_opts_inquiry_string_show(struct config_item *item, |
| 3214 | char *page) |
| 3215 | { |
| 3216 | return fsg_show_inquiry_string(to_fsg_lun_opts(item)->lun, page); |
| 3217 | } |
| 3218 | |
| 3219 | static ssize_t fsg_lun_opts_inquiry_string_store(struct config_item *item, |
| 3220 | const char *page, size_t len) |
| 3221 | { |
| 3222 | return fsg_store_inquiry_string(to_fsg_lun_opts(item)->lun, page, len); |
| 3223 | } |
| 3224 | |
| 3225 | CONFIGFS_ATTR(fsg_lun_opts_, inquiry_string); |
| 3226 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3227 | static struct configfs_attribute *fsg_lun_attrs[] = { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3228 | &fsg_lun_opts_attr_file, |
| 3229 | &fsg_lun_opts_attr_ro, |
| 3230 | &fsg_lun_opts_attr_removable, |
| 3231 | &fsg_lun_opts_attr_cdrom, |
| 3232 | &fsg_lun_opts_attr_nofua, |
Philipp Gesang | 6ac4709 | 2016-08-01 17:04:19 +0200 | [diff] [blame] | 3233 | &fsg_lun_opts_attr_inquiry_string, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3234 | NULL, |
| 3235 | }; |
| 3236 | |
| 3237 | static struct config_item_type fsg_lun_type = { |
| 3238 | .ct_item_ops = &fsg_lun_item_ops, |
| 3239 | .ct_attrs = fsg_lun_attrs, |
| 3240 | .ct_owner = THIS_MODULE, |
| 3241 | }; |
| 3242 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3243 | static struct config_group *fsg_lun_make(struct config_group *group, |
| 3244 | const char *name) |
| 3245 | { |
| 3246 | struct fsg_lun_opts *opts; |
| 3247 | struct fsg_opts *fsg_opts; |
| 3248 | struct fsg_lun_config config; |
| 3249 | char *num_str; |
| 3250 | u8 num; |
| 3251 | int ret; |
| 3252 | |
| 3253 | num_str = strchr(name, '.'); |
| 3254 | if (!num_str) { |
| 3255 | pr_err("Unable to locate . in LUN.NUMBER\n"); |
| 3256 | return ERR_PTR(-EINVAL); |
| 3257 | } |
| 3258 | num_str++; |
| 3259 | |
| 3260 | ret = kstrtou8(num_str, 0, &num); |
| 3261 | if (ret) |
| 3262 | return ERR_PTR(ret); |
| 3263 | |
| 3264 | fsg_opts = to_fsg_opts(&group->cg_item); |
| 3265 | if (num >= FSG_MAX_LUNS) |
Andrzej Pietrasiewicz | 5bb7289 | 2013-10-16 08:34:51 +0200 | [diff] [blame] | 3266 | return ERR_PTR(-ERANGE); |
| 3267 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3268 | mutex_lock(&fsg_opts->lock); |
| 3269 | if (fsg_opts->refcnt || fsg_opts->common->luns[num]) { |
| 3270 | ret = -EBUSY; |
| 3271 | goto out; |
| 3272 | } |
| 3273 | |
| 3274 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); |
| 3275 | if (!opts) { |
| 3276 | ret = -ENOMEM; |
| 3277 | goto out; |
| 3278 | } |
| 3279 | |
| 3280 | memset(&config, 0, sizeof(config)); |
| 3281 | config.removable = true; |
| 3282 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3283 | ret = fsg_common_create_lun(fsg_opts->common, &config, num, name, |
| 3284 | (const char **)&group->cg_item.ci_name); |
| 3285 | if (ret) { |
| 3286 | kfree(opts); |
| 3287 | goto out; |
| 3288 | } |
| 3289 | opts->lun = fsg_opts->common->luns[num]; |
| 3290 | opts->lun_id = num; |
| 3291 | mutex_unlock(&fsg_opts->lock); |
| 3292 | |
| 3293 | config_group_init_type_name(&opts->group, name, &fsg_lun_type); |
| 3294 | |
| 3295 | return &opts->group; |
| 3296 | out: |
| 3297 | mutex_unlock(&fsg_opts->lock); |
| 3298 | return ERR_PTR(ret); |
| 3299 | } |
| 3300 | |
| 3301 | static void fsg_lun_drop(struct config_group *group, struct config_item *item) |
| 3302 | { |
| 3303 | struct fsg_lun_opts *lun_opts; |
| 3304 | struct fsg_opts *fsg_opts; |
| 3305 | |
| 3306 | lun_opts = to_fsg_lun_opts(item); |
| 3307 | fsg_opts = to_fsg_opts(&group->cg_item); |
| 3308 | |
| 3309 | mutex_lock(&fsg_opts->lock); |
| 3310 | if (fsg_opts->refcnt) { |
| 3311 | struct config_item *gadget; |
| 3312 | |
| 3313 | gadget = group->cg_item.ci_parent->ci_parent; |
| 3314 | unregister_gadget_item(gadget); |
| 3315 | } |
| 3316 | |
Krzysztof Opasiak | 5542f58 | 2015-07-31 13:37:45 +0200 | [diff] [blame] | 3317 | fsg_common_remove_lun(lun_opts->lun); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3318 | fsg_opts->common->luns[lun_opts->lun_id] = NULL; |
| 3319 | lun_opts->lun_id = 0; |
| 3320 | mutex_unlock(&fsg_opts->lock); |
| 3321 | |
| 3322 | config_item_put(item); |
| 3323 | } |
| 3324 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3325 | static void fsg_attr_release(struct config_item *item) |
| 3326 | { |
| 3327 | struct fsg_opts *opts = to_fsg_opts(item); |
| 3328 | |
| 3329 | usb_put_function_instance(&opts->func_inst); |
| 3330 | } |
| 3331 | |
| 3332 | static struct configfs_item_operations fsg_item_ops = { |
Andrzej Pietrasiewicz | 5bb7289 | 2013-10-16 08:34:51 +0200 | [diff] [blame] | 3333 | .release = fsg_attr_release, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3334 | }; |
| 3335 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3336 | static ssize_t fsg_opts_stall_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3337 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3338 | struct fsg_opts *opts = to_fsg_opts(item); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3339 | int result; |
| 3340 | |
| 3341 | mutex_lock(&opts->lock); |
| 3342 | result = sprintf(page, "%d", opts->common->can_stall); |
| 3343 | mutex_unlock(&opts->lock); |
| 3344 | |
| 3345 | return result; |
| 3346 | } |
| 3347 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3348 | static ssize_t fsg_opts_stall_store(struct config_item *item, const char *page, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3349 | size_t len) |
| 3350 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3351 | struct fsg_opts *opts = to_fsg_opts(item); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3352 | int ret; |
Andrzej Pietrasiewicz | 5bb7289 | 2013-10-16 08:34:51 +0200 | [diff] [blame] | 3353 | bool stall; |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3354 | |
| 3355 | mutex_lock(&opts->lock); |
Andrzej Pietrasiewicz | 5bb7289 | 2013-10-16 08:34:51 +0200 | [diff] [blame] | 3356 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3357 | if (opts->refcnt) { |
Andrzej Pietrasiewicz | 5bb7289 | 2013-10-16 08:34:51 +0200 | [diff] [blame] | 3358 | mutex_unlock(&opts->lock); |
| 3359 | return -EBUSY; |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3360 | } |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3361 | |
Andrzej Pietrasiewicz | 5bb7289 | 2013-10-16 08:34:51 +0200 | [diff] [blame] | 3362 | ret = strtobool(page, &stall); |
| 3363 | if (!ret) { |
| 3364 | opts->common->can_stall = stall; |
| 3365 | ret = len; |
| 3366 | } |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3367 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3368 | mutex_unlock(&opts->lock); |
Andrzej Pietrasiewicz | 5bb7289 | 2013-10-16 08:34:51 +0200 | [diff] [blame] | 3369 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3370 | return ret; |
| 3371 | } |
| 3372 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3373 | CONFIGFS_ATTR(fsg_opts_, stall); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3374 | |
| 3375 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3376 | static ssize_t fsg_opts_num_buffers_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3377 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3378 | struct fsg_opts *opts = to_fsg_opts(item); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3379 | int result; |
| 3380 | |
| 3381 | mutex_lock(&opts->lock); |
| 3382 | result = sprintf(page, "%d", opts->common->fsg_num_buffers); |
| 3383 | mutex_unlock(&opts->lock); |
| 3384 | |
| 3385 | return result; |
| 3386 | } |
| 3387 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3388 | static ssize_t fsg_opts_num_buffers_store(struct config_item *item, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3389 | const char *page, size_t len) |
| 3390 | { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3391 | struct fsg_opts *opts = to_fsg_opts(item); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3392 | int ret; |
| 3393 | u8 num; |
| 3394 | |
| 3395 | mutex_lock(&opts->lock); |
| 3396 | if (opts->refcnt) { |
| 3397 | ret = -EBUSY; |
| 3398 | goto end; |
| 3399 | } |
| 3400 | ret = kstrtou8(page, 0, &num); |
| 3401 | if (ret) |
| 3402 | goto end; |
| 3403 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3404 | fsg_common_set_num_buffers(opts->common, num); |
| 3405 | ret = len; |
| 3406 | |
| 3407 | end: |
| 3408 | mutex_unlock(&opts->lock); |
| 3409 | return ret; |
| 3410 | } |
| 3411 | |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3412 | CONFIGFS_ATTR(fsg_opts_, num_buffers); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3413 | #endif |
| 3414 | |
| 3415 | static struct configfs_attribute *fsg_attrs[] = { |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3416 | &fsg_opts_attr_stall, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3417 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
Christoph Hellwig | 4a90cb2 | 2015-10-03 15:32:47 +0200 | [diff] [blame] | 3418 | &fsg_opts_attr_num_buffers, |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3419 | #endif |
| 3420 | NULL, |
| 3421 | }; |
| 3422 | |
| 3423 | static struct configfs_group_operations fsg_group_ops = { |
| 3424 | .make_group = fsg_lun_make, |
| 3425 | .drop_item = fsg_lun_drop, |
| 3426 | }; |
| 3427 | |
| 3428 | static struct config_item_type fsg_func_type = { |
| 3429 | .ct_item_ops = &fsg_item_ops, |
| 3430 | .ct_group_ops = &fsg_group_ops, |
| 3431 | .ct_attrs = fsg_attrs, |
| 3432 | .ct_owner = THIS_MODULE, |
| 3433 | }; |
| 3434 | |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3435 | static void fsg_free_inst(struct usb_function_instance *fi) |
| 3436 | { |
| 3437 | struct fsg_opts *opts; |
| 3438 | |
| 3439 | opts = fsg_opts_from_func_inst(fi); |
| 3440 | fsg_common_put(opts->common); |
| 3441 | kfree(opts); |
| 3442 | } |
| 3443 | |
| 3444 | static struct usb_function_instance *fsg_alloc_inst(void) |
| 3445 | { |
| 3446 | struct fsg_opts *opts; |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3447 | struct fsg_lun_config config; |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3448 | int rc; |
| 3449 | |
| 3450 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); |
| 3451 | if (!opts) |
| 3452 | return ERR_PTR(-ENOMEM); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3453 | mutex_init(&opts->lock); |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3454 | opts->func_inst.free_func_inst = fsg_free_inst; |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 3455 | opts->common = fsg_common_setup(opts->common); |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3456 | if (IS_ERR(opts->common)) { |
| 3457 | rc = PTR_ERR(opts->common); |
| 3458 | goto release_opts; |
| 3459 | } |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3460 | |
| 3461 | rc = fsg_common_set_num_buffers(opts->common, |
| 3462 | CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS); |
| 3463 | if (rc) |
Krzysztof Opasiak | dd02ea5 | 2015-07-31 13:46:07 +0200 | [diff] [blame] | 3464 | goto release_opts; |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3465 | |
| 3466 | pr_info(FSG_DRIVER_DESC ", version: " FSG_DRIVER_VERSION "\n"); |
| 3467 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3468 | memset(&config, 0, sizeof(config)); |
| 3469 | config.removable = true; |
| 3470 | rc = fsg_common_create_lun(opts->common, &config, 0, "lun.0", |
| 3471 | (const char **)&opts->func_inst.group.cg_item.ci_name); |
Krzysztof Opasiak | 903588a | 2015-07-20 20:15:17 +0200 | [diff] [blame] | 3472 | if (rc) |
| 3473 | goto release_buffers; |
| 3474 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3475 | opts->lun0.lun = opts->common->luns[0]; |
| 3476 | opts->lun0.lun_id = 0; |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3477 | |
| 3478 | config_group_init_type_name(&opts->func_inst.group, "", &fsg_func_type); |
| 3479 | |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 3480 | config_group_init_type_name(&opts->lun0.group, "lun.0", &fsg_lun_type); |
| 3481 | configfs_add_default_group(&opts->lun0.group, &opts->func_inst.group); |
| 3482 | |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3483 | return &opts->func_inst; |
| 3484 | |
Krzysztof Opasiak | 903588a | 2015-07-20 20:15:17 +0200 | [diff] [blame] | 3485 | release_buffers: |
| 3486 | fsg_common_free_buffers(opts->common); |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3487 | release_opts: |
| 3488 | kfree(opts); |
| 3489 | return ERR_PTR(rc); |
| 3490 | } |
| 3491 | |
| 3492 | static void fsg_free(struct usb_function *f) |
| 3493 | { |
| 3494 | struct fsg_dev *fsg; |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3495 | struct fsg_opts *opts; |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3496 | |
| 3497 | fsg = container_of(f, struct fsg_dev, function); |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3498 | opts = container_of(f->fi, struct fsg_opts, func_inst); |
| 3499 | |
| 3500 | mutex_lock(&opts->lock); |
| 3501 | opts->refcnt--; |
| 3502 | mutex_unlock(&opts->lock); |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3503 | |
| 3504 | kfree(fsg); |
| 3505 | } |
| 3506 | |
| 3507 | static struct usb_function *fsg_alloc(struct usb_function_instance *fi) |
| 3508 | { |
| 3509 | struct fsg_opts *opts = fsg_opts_from_func_inst(fi); |
| 3510 | struct fsg_common *common = opts->common; |
| 3511 | struct fsg_dev *fsg; |
| 3512 | |
| 3513 | fsg = kzalloc(sizeof(*fsg), GFP_KERNEL); |
| 3514 | if (unlikely(!fsg)) |
| 3515 | return ERR_PTR(-ENOMEM); |
| 3516 | |
Andrzej Pietrasiewicz | ef0aa4b | 2013-10-09 10:06:05 +0200 | [diff] [blame] | 3517 | mutex_lock(&opts->lock); |
| 3518 | opts->refcnt++; |
| 3519 | mutex_unlock(&opts->lock); |
Michal Nazarewicz | 8515bac | 2015-06-19 23:56:34 +0200 | [diff] [blame] | 3520 | |
Andrzej Pietrasiewicz | e5eaa0d | 2013-10-09 10:06:01 +0200 | [diff] [blame] | 3521 | fsg->function.name = FSG_DRIVER_DESC; |
| 3522 | fsg->function.bind = fsg_bind; |
| 3523 | fsg->function.unbind = fsg_unbind; |
| 3524 | fsg->function.setup = fsg_setup; |
| 3525 | fsg->function.set_alt = fsg_set_alt; |
| 3526 | fsg->function.disable = fsg_disable; |
| 3527 | fsg->function.free_func = fsg_free; |
| 3528 | |
| 3529 | fsg->common = common; |
| 3530 | |
| 3531 | return &fsg->function; |
| 3532 | } |
| 3533 | |
| 3534 | DECLARE_USB_FUNCTION_INIT(mass_storage, fsg_alloc_inst, fsg_alloc); |
| 3535 | MODULE_LICENSE("GPL"); |
| 3536 | MODULE_AUTHOR("Michal Nazarewicz"); |
| 3537 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3538 | /************************* Module parameters *************************/ |
| 3539 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3540 | |
Andrzej Pietrasiewicz | f3fed36 | 2013-09-26 14:38:17 +0200 | [diff] [blame] | 3541 | void fsg_config_from_params(struct fsg_config *cfg, |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 3542 | const struct fsg_module_parameters *params, |
| 3543 | unsigned int fsg_num_buffers) |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3544 | { |
| 3545 | struct fsg_lun_config *lun; |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 3546 | unsigned i; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3547 | |
| 3548 | /* Configure LUNs */ |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 3549 | cfg->nluns = |
| 3550 | min(params->luns ?: (params->file_count ?: 1u), |
| 3551 | (unsigned)FSG_MAX_LUNS); |
| 3552 | for (i = 0, lun = cfg->luns; i < cfg->nluns; ++i, ++lun) { |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3553 | lun->ro = !!params->ro[i]; |
| 3554 | lun->cdrom = !!params->cdrom[i]; |
Michal Nazarewicz | fa84c57 | 2012-05-26 16:32:39 -0700 | [diff] [blame] | 3555 | lun->removable = !!params->removable[i]; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3556 | lun->filename = |
| 3557 | params->file_count > i && params->file[i][0] |
| 3558 | ? params->file[i] |
Jingoo Han | 136c489 | 2013-08-05 12:11:05 +0900 | [diff] [blame] | 3559 | : NULL; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3560 | } |
| 3561 | |
Michal Nazarewicz | d26a6aa | 2009-11-09 14:15:23 +0100 | [diff] [blame] | 3562 | /* Let MSF use defaults */ |
Jingoo Han | 136c489 | 2013-08-05 12:11:05 +0900 | [diff] [blame] | 3563 | cfg->vendor_name = NULL; |
| 3564 | cfg->product_name = NULL; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3565 | |
Michal Nazarewicz | 8876f5e | 2010-06-21 13:57:09 +0200 | [diff] [blame] | 3566 | cfg->ops = NULL; |
| 3567 | cfg->private_data = NULL; |
Michal Nazarewicz | c85efcb | 2009-11-09 14:15:26 +0100 | [diff] [blame] | 3568 | |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3569 | /* Finalise */ |
| 3570 | cfg->can_stall = params->stall; |
Andrzej Pietrasiewicz | 6fdc5dd | 2013-09-26 14:38:16 +0200 | [diff] [blame] | 3571 | cfg->fsg_num_buffers = fsg_num_buffers; |
Michal Nazarewicz | 481e492 | 2009-11-09 14:15:21 +0100 | [diff] [blame] | 3572 | } |
Andrzej Pietrasiewicz | 7a93d04 | 2013-10-09 10:08:28 +0200 | [diff] [blame] | 3573 | EXPORT_SYMBOL_GPL(fsg_config_from_params); |