pud_dev.c revision 1.7.2.3
1 /* $NetBSD: pud_dev.c,v 1.7.2.3 2016/07/19 06:26:59 pgoyette Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Research Foundation of Helsinki University of Technology 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 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 19 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: pud_dev.c,v 1.7.2.3 2016/07/19 06:26:59 pgoyette Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/buf.h> 36 #include <sys/conf.h> 37 #include <sys/event.h> 38 #include <sys/ioccom.h> 39 #include <sys/kmem.h> 40 #include <sys/poll.h> 41 #include <sys/socketvar.h> 42 #include <sys/localcount.h> 43 44 #include <dev/pud/pud_sys.h> 45 46 /* 47 * b/c independent helpers 48 */ 49 50 static int 51 doopenclose(dev_t dev, int flags, int fmt, int class, int type) 52 { 53 struct pud_req_openclose pc_oc; /* XXX: stack = stupid */ 54 55 pc_oc.pm_flags = flags; 56 pc_oc.pm_fmt = fmt; 57 58 return pud_request(dev, &pc_oc, sizeof(pc_oc), class, type); 59 } 60 61 #include <sys/disklabel.h> 62 static int 63 doioctl(dev_t dev, u_long cmd, void *data, int flag, int class, int type) 64 { 65 struct pud_req_ioctl *pc_ioctl; 66 size_t dlen, allocsize; 67 int error; 68 69 dlen = IOCPARM_LEN(cmd); 70 allocsize = sizeof(struct pud_req_ioctl) + dlen; 71 pc_ioctl = kmem_zalloc(allocsize, KM_SLEEP); 72 73 pc_ioctl->pm_iocmd = cmd; 74 pc_ioctl->pm_flag = flag; 75 76 if (cmd & IOC_IN) 77 memcpy(pc_ioctl->pm_data, data, dlen); 78 error = pud_request(dev, pc_ioctl, allocsize, class, type); 79 if (error) 80 goto out; 81 if (cmd & IOC_OUT) 82 memcpy(data, pc_ioctl->pm_data, dlen); 83 84 out: 85 kmem_free(pc_ioctl, allocsize); 86 return error; 87 } 88 89 /* 90 * Block de-vices 91 */ 92 93 static dev_type_open(pud_bdev_open); 94 static dev_type_close(pud_bdev_close); 95 static dev_type_strategy(pud_bdev_strategy); 96 static dev_type_ioctl(pud_bdev_ioctl); 97 #if 0 98 static dev_type_dump(pud_bdev_dump); 99 static dev_type_size(pud_bdev_size); 100 #endif 101 102 struct bdevsw pud_bdevsw = { 103 LOCALCOUNT_INITIALIZER 104 .d_open = pud_bdev_open, 105 .d_close = pud_bdev_close, 106 .d_strategy = pud_bdev_strategy, 107 .d_ioctl = pud_bdev_ioctl, 108 #if 0 109 .d_dump = pud_bdev_dump, 110 .d_psize = pud_bdev_size, 111 #endif 112 }; 113 114 static int 115 pud_bdev_open(dev_t dev, int flags, int fmt, lwp_t *l) 116 { 117 118 return doopenclose(dev, flags, fmt, PUD_REQ_BDEV, PUD_BDEV_OPEN); 119 } 120 121 static int 122 pud_bdev_close(dev_t dev, int flags, int fmt, lwp_t *l) 123 { 124 125 return doopenclose(dev, flags, fmt, PUD_REQ_BDEV, PUD_BDEV_CLOSE); 126 } 127 128 static void 129 pud_bdev_strategy(struct buf *bp) 130 { 131 struct pud_req_readwrite *pc_rw; 132 size_t allocsize; 133 int error; 134 135 allocsize = sizeof(struct pud_req_readwrite) + bp->b_bcount; 136 pc_rw = kmem_zalloc(allocsize, KM_SLEEP); 137 138 pc_rw->pm_offset = bp->b_blkno << DEV_BSHIFT; 139 pc_rw->pm_resid = bp->b_bcount; 140 141 if (BUF_ISWRITE(bp)) 142 memcpy(pc_rw->pm_data, bp->b_data, bp->b_bcount); 143 144 error = pud_request(bp->b_dev, pc_rw, allocsize, PUD_REQ_BDEV, 145 BUF_ISREAD(bp) ? PUD_BDEV_STRATREAD : PUD_BDEV_STRATWRITE); 146 if (error) 147 goto out; 148 149 if (pc_rw->pm_resid > bp->b_bcount) { 150 error = EINVAL; 151 goto out; 152 } 153 154 if (BUF_ISREAD(bp)) 155 memcpy(bp->b_data,pc_rw->pm_data,bp->b_bcount-pc_rw->pm_resid); 156 157 bp->b_resid = pc_rw->pm_resid; 158 159 out: 160 kmem_free(pc_rw, allocsize); 161 bp->b_error = error; 162 biodone(bp); 163 } 164 165 int 166 pud_bdev_ioctl(dev_t dev, u_long cmd, void *data, int flag, lwp_t *l) 167 { 168 169 return doioctl(dev, cmd, data, flag, PUD_REQ_BDEV, PUD_BDEV_IOCTL); 170 } 171 172 /* hnmmm */ 173 #if 0 174 int 175 pud_bdev_dump(dev_t dev, daddr_t addr, void *data, size_t sz) 176 { 177 178 return EOPNOTSUPP; 179 } 180 181 int 182 pud_bdev_size(dev_t dev) 183 { 184 185 return 0; 186 } 187 #endif 188 189 /* 190 * Charrr devices 191 */ 192 193 static dev_type_open(pud_cdev_open); 194 static dev_type_close(pud_cdev_close); 195 static dev_type_read(pud_cdev_read); 196 static dev_type_write(pud_cdev_write); 197 static dev_type_ioctl(pud_cdev_ioctl); 198 static dev_type_poll(pud_cdev_poll); 199 static dev_type_mmap(pud_cdev_mmap); 200 static dev_type_kqfilter(pud_cdev_kqfilter); 201 202 struct cdevsw pud_cdevsw = { 203 LOCALCOUNT_INITIALIZER 204 .d_open = pud_cdev_open, 205 .d_close = pud_cdev_close, 206 .d_read = pud_cdev_read, 207 .d_write = pud_cdev_write, 208 .d_ioctl = pud_cdev_ioctl, 209 #if 0 210 .d_stop = pud_cdev_stop, 211 .d_tty = pud_cdev_tty, 212 #endif 213 .d_poll = pud_cdev_poll, 214 .d_mmap = pud_cdev_mmap, 215 .d_kqfilter = pud_cdev_kqfilter, 216 .d_flag = D_OTHER, 217 }; 218 219 static int 220 pud_cdev_open(dev_t dev, int flags, int fmt, lwp_t *l) 221 { 222 223 return doopenclose(dev, flags, fmt, PUD_REQ_CDEV, PUD_CDEV_OPEN); 224 } 225 226 static int 227 pud_cdev_close(dev_t dev, int flags, int fmt, lwp_t *l) 228 { 229 230 return doopenclose(dev, flags, fmt, PUD_REQ_CDEV, PUD_CDEV_CLOSE); 231 } 232 233 static int 234 pud_cdev_read(dev_t dev, struct uio *uio, int flag) 235 { 236 struct pud_creq_read *pc_read; 237 size_t allocsize; 238 int error; 239 240 allocsize = sizeof(struct pud_creq_read) + uio->uio_resid; 241 pc_read = kmem_zalloc(allocsize, KM_SLEEP); 242 243 pc_read->pm_offset = uio->uio_offset; 244 pc_read->pm_resid = uio->uio_resid; 245 246 error = pud_request(dev, pc_read, allocsize, 247 PUD_REQ_CDEV, PUD_CDEV_READ); 248 if (error) 249 goto out; 250 251 if (pc_read->pm_resid > uio->uio_resid) { 252 error = EINVAL; 253 goto out; 254 } 255 256 error = uiomove(pc_read->pm_data, 257 uio->uio_resid - pc_read->pm_resid, uio); 258 259 out: 260 kmem_free(pc_read, allocsize); 261 return error; 262 } 263 264 static int 265 pud_cdev_write(dev_t dev, struct uio *uio, int flag) 266 { 267 struct pud_creq_write *pc_write; 268 size_t allocsize; 269 int error; 270 271 allocsize = sizeof(struct pud_creq_write) + uio->uio_resid; 272 pc_write = kmem_zalloc(allocsize, KM_SLEEP); 273 274 pc_write->pm_offset = uio->uio_offset; 275 pc_write->pm_resid = uio->uio_resid; 276 277 error = uiomove(pc_write->pm_data, uio->uio_resid, uio); 278 if (error) 279 goto out; 280 281 error = pud_request(dev, pc_write, allocsize, 282 PUD_REQ_CDEV, PUD_CDEV_WRITE); 283 if (error) 284 goto out; 285 286 if (pc_write->pm_resid) 287 error = EIO; 288 289 out: 290 kmem_free(pc_write, allocsize); 291 return error; 292 } 293 294 static int 295 pud_cdev_ioctl(dev_t dev, u_long cmd, void *data, int flag, lwp_t *l) 296 { 297 298 return doioctl(dev, cmd, data, flag, PUD_REQ_CDEV, PUD_CDEV_IOCTL); 299 } 300 301 static paddr_t 302 pud_cdev_mmap(dev_t dev, off_t off, int flag) 303 { 304 305 return (paddr_t)-1; 306 } 307 308 static int 309 pud_cdev_poll(dev_t dev, int flag, lwp_t *l) 310 { 311 312 return EOPNOTSUPP; 313 } 314 315 static int 316 pud_cdev_kqfilter(dev_t dev, struct knote *kn) 317 { 318 319 return EOPNOTSUPP; 320 } 321
Indexes created Mon Oct 20 20:10:13 GMT 2025