1 /*- 2 * Copyright (c) 2008 Semihalf, Rafal Jaworowski 3 * Copyright (c) 2009 Semihalf, Piotr Ziecik 4 * Copyright (c) 2012 Andrey V. Elsukov <ae@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 /* 31 * Block storage I/O routines for U-Boot 32 */ 33 34 #include <sys/cdefs.h> 35 #include <sys/param.h> 36 #include <sys/disk.h> 37 #include <machine/stdarg.h> 38 #include <stand.h> 39 40 #include "api_public.h" 41 #include "bootstrap.h" 42 #include "disk.h" 43 #include "glue.h" 44 #include "libuboot.h" 45 46 #define stor_printf(fmt, args...) do { \ 47 printf("%s%d: ", dev->dd.d_dev->dv_name, dev->dd.d_unit); \ 48 printf(fmt, ##args); \ 49 } while (0) 50 51 #ifdef DEBUG 52 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \ 53 printf(fmt,##args); } while (0) 54 #else 55 #define debugf(fmt, args...) 56 #endif 57 58 static struct { 59 int opened; /* device is opened */ 60 int handle; /* storage device handle */ 61 int type; /* storage type */ 62 off_t blocks; /* block count */ 63 u_int bsize; /* block size */ 64 } stor_info[UB_MAX_DEV]; 65 66 #define SI(dev) (stor_info[(dev)->dd.d_unit]) 67 68 static int stor_info_no = 0; 69 static int stor_opendev(struct disk_devdesc *); 70 static int stor_readdev(struct disk_devdesc *, daddr_t, size_t, char *); 71 72 /* devsw I/F */ 73 static int stor_init(void); 74 static int stor_strategy(void *, int, daddr_t, size_t, char *, size_t *); 75 static int stor_open(struct open_file *, ...); 76 static int stor_close(struct open_file *); 77 static int stor_ioctl(struct open_file *f, u_long cmd, void *data); 78 static int stor_print(int); 79 static void stor_cleanup(void); 80 81 struct devsw uboot_storage = { 82 .dv_name = "disk", 83 .dv_type = DEVT_DISK, 84 .dv_init = stor_init, 85 .dv_strategy = stor_strategy, 86 .dv_open = stor_open, 87 .dv_close = stor_close, 88 .dv_ioctl = stor_ioctl, 89 .dv_print = stor_print, 90 .dv_cleanup = stor_cleanup, 91 .dv_fmtdev = disk_fmtdev, 92 .dv_parsedev = disk_parsedev, 93 }; 94 95 static int 96 stor_init(void) 97 { 98 struct device_info *di; 99 int i; 100 101 if (devs_no == 0) { 102 printf("No U-Boot devices! Really enumerated?\n"); 103 return (-1); 104 } 105 106 for (i = 0; i < devs_no; i++) { 107 di = ub_dev_get(i); 108 if ((di != NULL) && (di->type & DEV_TYP_STOR)) { 109 if (stor_info_no >= UB_MAX_DEV) { 110 printf("Too many storage devices: %d\n", 111 stor_info_no); 112 return (-1); 113 } 114 stor_info[stor_info_no].handle = i; 115 stor_info[stor_info_no].opened = 0; 116 stor_info[stor_info_no].type = di->type; 117 stor_info[stor_info_no].blocks = 118 di->di_stor.block_count; 119 stor_info[stor_info_no].bsize = 120 di->di_stor.block_size; 121 stor_info_no++; 122 } 123 } 124 125 if (!stor_info_no) { 126 debugf("No storage devices\n"); 127 return (-1); 128 } 129 130 debugf("storage devices found: %d\n", stor_info_no); 131 return (0); 132 } 133 134 static void 135 stor_cleanup(void) 136 { 137 int i; 138 139 for (i = 0; i < stor_info_no; i++) 140 if (stor_info[i].opened > 0) 141 ub_dev_close(stor_info[i].handle); 142 } 143 144 static int 145 stor_strategy(void *devdata, int rw, daddr_t blk, size_t size, 146 char *buf, size_t *rsize) 147 { 148 struct disk_devdesc *dev = (struct disk_devdesc *)devdata; 149 daddr_t bcount; 150 int err; 151 152 rw &= F_MASK; 153 if (rw != F_READ) { 154 stor_printf("write attempt, operation not supported!\n"); 155 return (EROFS); 156 } 157 158 if (size % SI(dev).bsize) { 159 stor_printf("size=%zu not multiple of device " 160 "block size=%d\n", 161 size, SI(dev).bsize); 162 return (EIO); 163 } 164 bcount = size / SI(dev).bsize; 165 if (rsize) 166 *rsize = 0; 167 168 err = stor_readdev(dev, blk + dev->d_offset, bcount, buf); 169 if (!err && rsize) 170 *rsize = size; 171 172 return (err); 173 } 174 175 static int 176 stor_open(struct open_file *f, ...) 177 { 178 va_list ap; 179 struct disk_devdesc *dev; 180 181 va_start(ap, f); 182 dev = va_arg(ap, struct disk_devdesc *); 183 va_end(ap); 184 185 return (stor_opendev(dev)); 186 } 187 188 static int 189 stor_opendev(struct disk_devdesc *dev) 190 { 191 int err; 192 193 if (dev->dd.d_unit < 0 || dev->dd.d_unit >= stor_info_no) 194 return (EIO); 195 196 if (SI(dev).opened == 0) { 197 err = ub_dev_open(SI(dev).handle); 198 if (err != 0) { 199 stor_printf("device open failed with error=%d, " 200 "handle=%d\n", err, SI(dev).handle); 201 return (ENXIO); 202 } 203 SI(dev).opened++; 204 } 205 return (disk_open(dev, SI(dev).blocks * SI(dev).bsize, 206 SI(dev).bsize)); 207 } 208 209 static int 210 stor_close(struct open_file *f) 211 { 212 struct disk_devdesc *dev; 213 214 dev = (struct disk_devdesc *)(f->f_devdata); 215 return (disk_close(dev)); 216 } 217 218 static int 219 stor_readdev(struct disk_devdesc *dev, daddr_t blk, size_t size, char *buf) 220 { 221 lbasize_t real_size; 222 int err; 223 224 debugf("reading blk=%d size=%d @ 0x%08x\n", (int)blk, size, (uint32_t)buf); 225 226 err = ub_dev_read(SI(dev).handle, buf, size, blk, &real_size); 227 if (err != 0) { 228 stor_printf("read failed, error=%d\n", err); 229 return (EIO); 230 } 231 232 if (real_size != size) { 233 stor_printf("real size != size\n"); 234 err = EIO; 235 } 236 237 return (err); 238 } 239 240 static int 241 stor_print(int verbose) 242 { 243 struct disk_devdesc dev; 244 static char line[80]; 245 int i, ret = 0; 246 247 if (stor_info_no == 0) 248 return (ret); 249 250 printf("%s devices:", uboot_storage.dv_name); 251 if ((ret = pager_output("\n")) != 0) 252 return (ret); 253 254 for (i = 0; i < stor_info_no; i++) { 255 dev.dd.d_dev = &uboot_storage; 256 dev.dd.d_unit = i; 257 dev.d_slice = D_SLICENONE; 258 dev.d_partition = D_PARTNONE; 259 snprintf(line, sizeof(line), "\tdisk%d (%s)\n", i, 260 ub_stor_type(SI(&dev).type)); 261 if ((ret = pager_output(line)) != 0) 262 break; 263 if (stor_opendev(&dev) == 0) { 264 sprintf(line, "\tdisk%d", i); 265 ret = disk_print(&dev, line, verbose); 266 disk_close(&dev); 267 if (ret != 0) 268 break; 269 } 270 } 271 return (ret); 272 } 273 274 static int 275 stor_ioctl(struct open_file *f, u_long cmd, void *data) 276 { 277 struct disk_devdesc *dev; 278 int rc; 279 280 dev = (struct disk_devdesc *)f->f_devdata; 281 rc = disk_ioctl(dev, cmd, data); 282 if (rc != ENOTTY) 283 return (rc); 284 285 switch (cmd) { 286 case DIOCGSECTORSIZE: 287 *(u_int *)data = SI(dev).bsize; 288 break; 289 case DIOCGMEDIASIZE: 290 *(uint64_t *)data = SI(dev).bsize * SI(dev).blocks; 291 break; 292 default: 293 return (ENOTTY); 294 } 295 return (0); 296 } 297 298 299 /* 300 * Return the device unit number for the given type and type-relative unit 301 * number. 302 */ 303 int 304 uboot_diskgetunit(int type, int type_unit) 305 { 306 int local_type_unit; 307 int i; 308 309 local_type_unit = 0; 310 for (i = 0; i < stor_info_no; i++) { 311 if ((stor_info[i].type & type) == type) { 312 if (local_type_unit == type_unit) { 313 return (i); 314 } 315 local_type_unit++; 316 } 317 } 318 319 return (-1); 320 } 321