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 __FBSDID("$FreeBSD$"); 36 37 #include <sys/param.h> 38 #include <sys/disk.h> 39 #include <machine/stdarg.h> 40 #include <stand.h> 41 42 #include "api_public.h" 43 #include "bootstrap.h" 44 #include "disk.h" 45 #include "glue.h" 46 #include "libuboot.h" 47 48 #define stor_printf(fmt, args...) do { \ 49 printf("%s%d: ", dev->dd.d_dev->dv_name, dev->dd.d_unit); \ 50 printf(fmt, ##args); \ 51 } while (0) 52 53 #ifdef DEBUG 54 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \ 55 printf(fmt,##args); } while (0) 56 #else 57 #define debugf(fmt, args...) 58 #endif 59 60 static struct { 61 int opened; /* device is opened */ 62 int handle; /* storage device handle */ 63 int type; /* storage type */ 64 off_t blocks; /* block count */ 65 u_int bsize; /* block size */ 66 } stor_info[UB_MAX_DEV]; 67 68 #define SI(dev) (stor_info[(dev)->dd.d_unit]) 69 70 static int stor_info_no = 0; 71 static int stor_opendev(struct disk_devdesc *); 72 static int stor_readdev(struct disk_devdesc *, daddr_t, size_t, char *); 73 74 /* devsw I/F */ 75 static int stor_init(void); 76 static int stor_strategy(void *, int, daddr_t, size_t, char *, size_t *); 77 static int stor_open(struct open_file *, ...); 78 static int stor_close(struct open_file *); 79 static int stor_ioctl(struct open_file *f, u_long cmd, void *data); 80 static int stor_print(int); 81 static void stor_cleanup(void); 82 83 struct devsw uboot_storage = { 84 .dv_name = "disk", 85 .dv_type = DEVT_DISK, 86 .dv_init = stor_init, 87 .dv_strategy = stor_strategy, 88 .dv_open = stor_open, 89 .dv_close = stor_close, 90 .dv_ioctl = stor_ioctl, 91 .dv_print = stor_print, 92 .dv_cleanup = stor_cleanup, 93 .dv_fmtdev = disk_fmtdev, 94 .dv_parsedev = disk_parsedev, 95 }; 96 97 static int 98 stor_init(void) 99 { 100 struct device_info *di; 101 int i; 102 103 if (devs_no == 0) { 104 printf("No U-Boot devices! Really enumerated?\n"); 105 return (-1); 106 } 107 108 for (i = 0; i < devs_no; i++) { 109 di = ub_dev_get(i); 110 if ((di != NULL) && (di->type & DEV_TYP_STOR)) { 111 if (stor_info_no >= UB_MAX_DEV) { 112 printf("Too many storage devices: %d\n", 113 stor_info_no); 114 return (-1); 115 } 116 stor_info[stor_info_no].handle = i; 117 stor_info[stor_info_no].opened = 0; 118 stor_info[stor_info_no].type = di->type; 119 stor_info[stor_info_no].blocks = 120 di->di_stor.block_count; 121 stor_info[stor_info_no].bsize = 122 di->di_stor.block_size; 123 stor_info_no++; 124 } 125 } 126 127 if (!stor_info_no) { 128 debugf("No storage devices\n"); 129 return (-1); 130 } 131 132 debugf("storage devices found: %d\n", stor_info_no); 133 return (0); 134 } 135 136 static void 137 stor_cleanup(void) 138 { 139 int i; 140 141 for (i = 0; i < stor_info_no; i++) 142 if (stor_info[i].opened > 0) 143 ub_dev_close(stor_info[i].handle); 144 } 145 146 static int 147 stor_strategy(void *devdata, int rw, daddr_t blk, size_t size, 148 char *buf, size_t *rsize) 149 { 150 struct disk_devdesc *dev = (struct disk_devdesc *)devdata; 151 daddr_t bcount; 152 int err; 153 154 rw &= F_MASK; 155 if (rw != F_READ) { 156 stor_printf("write attempt, operation not supported!\n"); 157 return (EROFS); 158 } 159 160 if (size % SI(dev).bsize) { 161 stor_printf("size=%zu not multiple of device " 162 "block size=%d\n", 163 size, SI(dev).bsize); 164 return (EIO); 165 } 166 bcount = size / SI(dev).bsize; 167 if (rsize) 168 *rsize = 0; 169 170 err = stor_readdev(dev, blk + dev->d_offset, bcount, buf); 171 if (!err && rsize) 172 *rsize = size; 173 174 return (err); 175 } 176 177 static int 178 stor_open(struct open_file *f, ...) 179 { 180 va_list ap; 181 struct disk_devdesc *dev; 182 183 va_start(ap, f); 184 dev = va_arg(ap, struct disk_devdesc *); 185 va_end(ap); 186 187 return (stor_opendev(dev)); 188 } 189 190 static int 191 stor_opendev(struct disk_devdesc *dev) 192 { 193 int err; 194 195 if (dev->dd.d_unit < 0 || dev->dd.d_unit >= stor_info_no) 196 return (EIO); 197 198 if (SI(dev).opened == 0) { 199 err = ub_dev_open(SI(dev).handle); 200 if (err != 0) { 201 stor_printf("device open failed with error=%d, " 202 "handle=%d\n", err, SI(dev).handle); 203 return (ENXIO); 204 } 205 SI(dev).opened++; 206 } 207 return (disk_open(dev, SI(dev).blocks * SI(dev).bsize, 208 SI(dev).bsize)); 209 } 210 211 static int 212 stor_close(struct open_file *f) 213 { 214 struct disk_devdesc *dev; 215 216 dev = (struct disk_devdesc *)(f->f_devdata); 217 return (disk_close(dev)); 218 } 219 220 static int 221 stor_readdev(struct disk_devdesc *dev, daddr_t blk, size_t size, char *buf) 222 { 223 lbasize_t real_size; 224 int err; 225 226 debugf("reading blk=%d size=%d @ 0x%08x\n", (int)blk, size, (uint32_t)buf); 227 228 err = ub_dev_read(SI(dev).handle, buf, size, blk, &real_size); 229 if (err != 0) { 230 stor_printf("read failed, error=%d\n", err); 231 return (EIO); 232 } 233 234 if (real_size != size) { 235 stor_printf("real size != size\n"); 236 err = EIO; 237 } 238 239 return (err); 240 } 241 242 static int 243 stor_print(int verbose) 244 { 245 struct disk_devdesc dev; 246 static char line[80]; 247 int i, ret = 0; 248 249 if (stor_info_no == 0) 250 return (ret); 251 252 printf("%s devices:", uboot_storage.dv_name); 253 if ((ret = pager_output("\n")) != 0) 254 return (ret); 255 256 for (i = 0; i < stor_info_no; i++) { 257 dev.dd.d_dev = &uboot_storage; 258 dev.dd.d_unit = i; 259 dev.d_slice = D_SLICENONE; 260 dev.d_partition = D_PARTNONE; 261 snprintf(line, sizeof(line), "\tdisk%d (%s)\n", i, 262 ub_stor_type(SI(&dev).type)); 263 if ((ret = pager_output(line)) != 0) 264 break; 265 if (stor_opendev(&dev) == 0) { 266 sprintf(line, "\tdisk%d", i); 267 ret = disk_print(&dev, line, verbose); 268 disk_close(&dev); 269 if (ret != 0) 270 break; 271 } 272 } 273 return (ret); 274 } 275 276 static int 277 stor_ioctl(struct open_file *f, u_long cmd, void *data) 278 { 279 struct disk_devdesc *dev; 280 int rc; 281 282 dev = (struct disk_devdesc *)f->f_devdata; 283 rc = disk_ioctl(dev, cmd, data); 284 if (rc != ENOTTY) 285 return (rc); 286 287 switch (cmd) { 288 case DIOCGSECTORSIZE: 289 *(u_int *)data = SI(dev).bsize; 290 break; 291 case DIOCGMEDIASIZE: 292 *(uint64_t *)data = SI(dev).bsize * SI(dev).blocks; 293 break; 294 default: 295 return (ENOTTY); 296 } 297 return (0); 298 } 299 300 301 /* 302 * Return the device unit number for the given type and type-relative unit 303 * number. 304 */ 305 int 306 uboot_diskgetunit(int type, int type_unit) 307 { 308 int local_type_unit; 309 int i; 310 311 local_type_unit = 0; 312 for (i = 0; i < stor_info_no; i++) { 313 if ((stor_info[i].type & type) == type) { 314 if (local_type_unit == type_unit) { 315 return (i); 316 } 317 local_type_unit++; 318 } 319 } 320 321 return (-1); 322 } 323