David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 1 | /* sunvdc.c: Sun LDOM Virtual Disk Client. |
| 2 | * |
David S. Miller | 3d452e5 | 2008-09-01 01:48:52 -0700 | [diff] [blame] | 3 | * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/module.h> |
| 7 | #include <linux/kernel.h> |
| 8 | #include <linux/types.h> |
| 9 | #include <linux/blkdev.h> |
| 10 | #include <linux/hdreg.h> |
| 11 | #include <linux/genhd.h> |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 12 | #include <linux/cdrom.h> |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 13 | #include <linux/slab.h> |
| 14 | #include <linux/spinlock.h> |
| 15 | #include <linux/completion.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/list.h> |
David Miller | d91c5e8 | 2007-10-24 08:46:01 +0200 | [diff] [blame] | 19 | #include <linux/scatterlist.h> |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 20 | |
| 21 | #include <asm/vio.h> |
| 22 | #include <asm/ldc.h> |
| 23 | |
| 24 | #define DRV_MODULE_NAME "sunvdc" |
| 25 | #define PFX DRV_MODULE_NAME ": " |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 26 | #define DRV_MODULE_VERSION "1.1" |
| 27 | #define DRV_MODULE_RELDATE "February 13, 2013" |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 28 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 29 | static char version[] = |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 30 | DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; |
| 31 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); |
| 32 | MODULE_DESCRIPTION("Sun LDOM virtual disk client driver"); |
| 33 | MODULE_LICENSE("GPL"); |
| 34 | MODULE_VERSION(DRV_MODULE_VERSION); |
| 35 | |
| 36 | #define VDC_TX_RING_SIZE 256 |
| 37 | |
| 38 | #define WAITING_FOR_LINK_UP 0x01 |
| 39 | #define WAITING_FOR_TX_SPACE 0x02 |
| 40 | #define WAITING_FOR_GEN_CMD 0x04 |
| 41 | #define WAITING_FOR_ANY -1 |
| 42 | |
| 43 | struct vdc_req_entry { |
| 44 | struct request *req; |
| 45 | }; |
| 46 | |
| 47 | struct vdc_port { |
| 48 | struct vio_driver_state vio; |
| 49 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 50 | struct gendisk *disk; |
| 51 | |
| 52 | struct vdc_completion *cmp; |
| 53 | |
| 54 | u64 req_id; |
| 55 | u64 seq; |
| 56 | struct vdc_req_entry rq_arr[VDC_TX_RING_SIZE]; |
| 57 | |
| 58 | unsigned long ring_cookies; |
| 59 | |
| 60 | u64 max_xfer_size; |
| 61 | u32 vdisk_block_size; |
| 62 | |
| 63 | /* The server fills these in for us in the disk attribute |
| 64 | * ACK packet. |
| 65 | */ |
| 66 | u64 operations; |
| 67 | u32 vdisk_size; |
| 68 | u8 vdisk_type; |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 69 | u8 vdisk_mtype; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 70 | |
| 71 | char disk_name[32]; |
| 72 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 73 | struct vio_disk_vtoc label; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 74 | }; |
| 75 | |
| 76 | static inline struct vdc_port *to_vdc_port(struct vio_driver_state *vio) |
| 77 | { |
| 78 | return container_of(vio, struct vdc_port, vio); |
| 79 | } |
| 80 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 81 | /* Ordered from largest major to lowest */ |
| 82 | static struct vio_version vdc_versions[] = { |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 83 | { .major = 1, .minor = 1 }, |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 84 | { .major = 1, .minor = 0 }, |
| 85 | }; |
| 86 | |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 87 | static inline int vdc_version_supported(struct vdc_port *port, |
| 88 | u16 major, u16 minor) |
| 89 | { |
| 90 | return port->vio.ver.major == major && port->vio.ver.minor >= minor; |
| 91 | } |
| 92 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 93 | #define VDCBLK_NAME "vdisk" |
| 94 | static int vdc_major; |
| 95 | #define PARTITION_SHIFT 3 |
| 96 | |
| 97 | static inline u32 vdc_tx_dring_avail(struct vio_dring_state *dr) |
| 98 | { |
| 99 | return vio_dring_avail(dr, VDC_TX_RING_SIZE); |
| 100 | } |
| 101 | |
| 102 | static int vdc_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| 103 | { |
| 104 | struct gendisk *disk = bdev->bd_disk; |
Allen Pais | de5b73f | 2014-09-19 09:42:26 -0400 | [diff] [blame^] | 105 | sector_t nsect = get_capacity(disk); |
| 106 | sector_t cylinders = nsect; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 107 | |
Allen Pais | de5b73f | 2014-09-19 09:42:26 -0400 | [diff] [blame^] | 108 | geo->heads = 0xff; |
| 109 | geo->sectors = 0x3f; |
| 110 | sector_div(cylinders, geo->heads * geo->sectors); |
| 111 | geo->cylinders = cylinders; |
| 112 | if ((sector_t)(geo->cylinders + 1) * geo->heads * geo->sectors < nsect) |
| 113 | geo->cylinders = 0xffff; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 118 | /* Add ioctl/CDROM_GET_CAPABILITY to support cdrom_id in udev |
| 119 | * when vdisk_mtype is VD_MEDIA_TYPE_CD or VD_MEDIA_TYPE_DVD. |
| 120 | * Needed to be able to install inside an ldom from an iso image. |
| 121 | */ |
| 122 | static int vdc_ioctl(struct block_device *bdev, fmode_t mode, |
| 123 | unsigned command, unsigned long argument) |
| 124 | { |
| 125 | int i; |
| 126 | struct gendisk *disk; |
| 127 | |
| 128 | switch (command) { |
| 129 | case CDROMMULTISESSION: |
| 130 | pr_debug(PFX "Multisession CDs not supported\n"); |
| 131 | for (i = 0; i < sizeof(struct cdrom_multisession); i++) |
| 132 | if (put_user(0, (char __user *)(argument + i))) |
| 133 | return -EFAULT; |
| 134 | return 0; |
| 135 | |
| 136 | case CDROM_GET_CAPABILITY: |
| 137 | disk = bdev->bd_disk; |
| 138 | |
| 139 | if (bdev->bd_disk && (disk->flags & GENHD_FL_CD)) |
| 140 | return 0; |
| 141 | return -EINVAL; |
| 142 | |
| 143 | default: |
| 144 | pr_debug(PFX "ioctl %08x not supported\n", command); |
| 145 | return -EINVAL; |
| 146 | } |
| 147 | } |
| 148 | |
Alexey Dobriyan | 83d5cde | 2009-09-21 17:01:13 -0700 | [diff] [blame] | 149 | static const struct block_device_operations vdc_fops = { |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 150 | .owner = THIS_MODULE, |
| 151 | .getgeo = vdc_getgeo, |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 152 | .ioctl = vdc_ioctl, |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 153 | }; |
| 154 | |
| 155 | static void vdc_finish(struct vio_driver_state *vio, int err, int waiting_for) |
| 156 | { |
| 157 | if (vio->cmp && |
| 158 | (waiting_for == -1 || |
| 159 | vio->cmp->waiting_for == waiting_for)) { |
| 160 | vio->cmp->err = err; |
| 161 | complete(&vio->cmp->com); |
| 162 | vio->cmp = NULL; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | static void vdc_handshake_complete(struct vio_driver_state *vio) |
| 167 | { |
| 168 | vdc_finish(vio, 0, WAITING_FOR_LINK_UP); |
| 169 | } |
| 170 | |
| 171 | static int vdc_handle_unknown(struct vdc_port *port, void *arg) |
| 172 | { |
| 173 | struct vio_msg_tag *pkt = arg; |
| 174 | |
| 175 | printk(KERN_ERR PFX "Received unknown msg [%02x:%02x:%04x:%08x]\n", |
| 176 | pkt->type, pkt->stype, pkt->stype_env, pkt->sid); |
| 177 | printk(KERN_ERR PFX "Resetting connection.\n"); |
| 178 | |
| 179 | ldc_disconnect(port->vio.lp); |
| 180 | |
| 181 | return -ECONNRESET; |
| 182 | } |
| 183 | |
| 184 | static int vdc_send_attr(struct vio_driver_state *vio) |
| 185 | { |
| 186 | struct vdc_port *port = to_vdc_port(vio); |
| 187 | struct vio_disk_attr_info pkt; |
| 188 | |
| 189 | memset(&pkt, 0, sizeof(pkt)); |
| 190 | |
| 191 | pkt.tag.type = VIO_TYPE_CTRL; |
| 192 | pkt.tag.stype = VIO_SUBTYPE_INFO; |
| 193 | pkt.tag.stype_env = VIO_ATTR_INFO; |
| 194 | pkt.tag.sid = vio_send_sid(vio); |
| 195 | |
| 196 | pkt.xfer_mode = VIO_DRING_MODE; |
| 197 | pkt.vdisk_block_size = port->vdisk_block_size; |
| 198 | pkt.max_xfer_size = port->max_xfer_size; |
| 199 | |
Sam Ravnborg | 3f4528d | 2009-01-06 13:20:38 -0800 | [diff] [blame] | 200 | viodbg(HS, "SEND ATTR xfer_mode[0x%x] blksz[%u] max_xfer[%llu]\n", |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 201 | pkt.xfer_mode, pkt.vdisk_block_size, pkt.max_xfer_size); |
| 202 | |
| 203 | return vio_ldc_send(&port->vio, &pkt, sizeof(pkt)); |
| 204 | } |
| 205 | |
| 206 | static int vdc_handle_attr(struct vio_driver_state *vio, void *arg) |
| 207 | { |
| 208 | struct vdc_port *port = to_vdc_port(vio); |
| 209 | struct vio_disk_attr_info *pkt = arg; |
| 210 | |
Sam Ravnborg | 3f4528d | 2009-01-06 13:20:38 -0800 | [diff] [blame] | 211 | viodbg(HS, "GOT ATTR stype[0x%x] ops[%llx] disk_size[%llu] disk_type[%x] " |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 212 | "mtype[0x%x] xfer_mode[0x%x] blksz[%u] max_xfer[%llu]\n", |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 213 | pkt->tag.stype, pkt->operations, |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 214 | pkt->vdisk_size, pkt->vdisk_type, pkt->vdisk_mtype, |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 215 | pkt->xfer_mode, pkt->vdisk_block_size, |
| 216 | pkt->max_xfer_size); |
| 217 | |
| 218 | if (pkt->tag.stype == VIO_SUBTYPE_ACK) { |
| 219 | switch (pkt->vdisk_type) { |
| 220 | case VD_DISK_TYPE_DISK: |
| 221 | case VD_DISK_TYPE_SLICE: |
| 222 | break; |
| 223 | |
| 224 | default: |
| 225 | printk(KERN_ERR PFX "%s: Bogus vdisk_type 0x%x\n", |
| 226 | vio->name, pkt->vdisk_type); |
| 227 | return -ECONNRESET; |
| 228 | } |
| 229 | |
| 230 | if (pkt->vdisk_block_size > port->vdisk_block_size) { |
| 231 | printk(KERN_ERR PFX "%s: BLOCK size increased " |
| 232 | "%u --> %u\n", |
| 233 | vio->name, |
| 234 | port->vdisk_block_size, pkt->vdisk_block_size); |
| 235 | return -ECONNRESET; |
| 236 | } |
| 237 | |
| 238 | port->operations = pkt->operations; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 239 | port->vdisk_type = pkt->vdisk_type; |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 240 | if (vdc_version_supported(port, 1, 1)) { |
| 241 | port->vdisk_size = pkt->vdisk_size; |
| 242 | port->vdisk_mtype = pkt->vdisk_mtype; |
| 243 | } |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 244 | if (pkt->max_xfer_size < port->max_xfer_size) |
| 245 | port->max_xfer_size = pkt->max_xfer_size; |
| 246 | port->vdisk_block_size = pkt->vdisk_block_size; |
| 247 | return 0; |
| 248 | } else { |
| 249 | printk(KERN_ERR PFX "%s: Attribute NACK\n", vio->name); |
| 250 | |
| 251 | return -ECONNRESET; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | static void vdc_end_special(struct vdc_port *port, struct vio_disk_desc *desc) |
| 256 | { |
| 257 | int err = desc->status; |
| 258 | |
| 259 | vdc_finish(&port->vio, -err, WAITING_FOR_GEN_CMD); |
| 260 | } |
| 261 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 262 | static void vdc_end_one(struct vdc_port *port, struct vio_dring_state *dr, |
| 263 | unsigned int index) |
| 264 | { |
| 265 | struct vio_disk_desc *desc = vio_dring_entry(dr, index); |
| 266 | struct vdc_req_entry *rqe = &port->rq_arr[index]; |
| 267 | struct request *req; |
| 268 | |
| 269 | if (unlikely(desc->hdr.state != VIO_DESC_DONE)) |
| 270 | return; |
| 271 | |
| 272 | ldc_unmap(port->vio.lp, desc->cookies, desc->ncookies); |
| 273 | desc->hdr.state = VIO_DESC_FREE; |
| 274 | dr->cons = (index + 1) & (VDC_TX_RING_SIZE - 1); |
| 275 | |
| 276 | req = rqe->req; |
| 277 | if (req == NULL) { |
| 278 | vdc_end_special(port, desc); |
| 279 | return; |
| 280 | } |
| 281 | |
| 282 | rqe->req = NULL; |
| 283 | |
Tejun Heo | 04420850 | 2009-04-28 13:06:08 +0900 | [diff] [blame] | 284 | __blk_end_request(req, (desc->status ? -EIO : 0), desc->size); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 285 | |
| 286 | if (blk_queue_stopped(port->disk->queue)) |
| 287 | blk_start_queue(port->disk->queue); |
| 288 | } |
| 289 | |
| 290 | static int vdc_ack(struct vdc_port *port, void *msgbuf) |
| 291 | { |
| 292 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
| 293 | struct vio_dring_data *pkt = msgbuf; |
| 294 | |
| 295 | if (unlikely(pkt->dring_ident != dr->ident || |
| 296 | pkt->start_idx != pkt->end_idx || |
| 297 | pkt->start_idx >= VDC_TX_RING_SIZE)) |
| 298 | return 0; |
| 299 | |
| 300 | vdc_end_one(port, dr, pkt->start_idx); |
| 301 | |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | static int vdc_nack(struct vdc_port *port, void *msgbuf) |
| 306 | { |
| 307 | /* XXX Implement me XXX */ |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | static void vdc_event(void *arg, int event) |
| 312 | { |
| 313 | struct vdc_port *port = arg; |
| 314 | struct vio_driver_state *vio = &port->vio; |
| 315 | unsigned long flags; |
| 316 | int err; |
| 317 | |
| 318 | spin_lock_irqsave(&vio->lock, flags); |
| 319 | |
| 320 | if (unlikely(event == LDC_EVENT_RESET || |
| 321 | event == LDC_EVENT_UP)) { |
| 322 | vio_link_state_change(vio, event); |
| 323 | spin_unlock_irqrestore(&vio->lock, flags); |
| 324 | return; |
| 325 | } |
| 326 | |
| 327 | if (unlikely(event != LDC_EVENT_DATA_READY)) { |
| 328 | printk(KERN_WARNING PFX "Unexpected LDC event %d\n", event); |
| 329 | spin_unlock_irqrestore(&vio->lock, flags); |
| 330 | return; |
| 331 | } |
| 332 | |
| 333 | err = 0; |
| 334 | while (1) { |
| 335 | union { |
| 336 | struct vio_msg_tag tag; |
| 337 | u64 raw[8]; |
| 338 | } msgbuf; |
| 339 | |
| 340 | err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf)); |
| 341 | if (unlikely(err < 0)) { |
| 342 | if (err == -ECONNRESET) |
| 343 | vio_conn_reset(vio); |
| 344 | break; |
| 345 | } |
| 346 | if (err == 0) |
| 347 | break; |
| 348 | viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n", |
| 349 | msgbuf.tag.type, |
| 350 | msgbuf.tag.stype, |
| 351 | msgbuf.tag.stype_env, |
| 352 | msgbuf.tag.sid); |
| 353 | err = vio_validate_sid(vio, &msgbuf.tag); |
| 354 | if (err < 0) |
| 355 | break; |
| 356 | |
| 357 | if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) { |
| 358 | if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) |
| 359 | err = vdc_ack(port, &msgbuf); |
| 360 | else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) |
| 361 | err = vdc_nack(port, &msgbuf); |
| 362 | else |
| 363 | err = vdc_handle_unknown(port, &msgbuf); |
| 364 | } else if (msgbuf.tag.type == VIO_TYPE_CTRL) { |
| 365 | err = vio_control_pkt_engine(vio, &msgbuf); |
| 366 | } else { |
| 367 | err = vdc_handle_unknown(port, &msgbuf); |
| 368 | } |
| 369 | if (err < 0) |
| 370 | break; |
| 371 | } |
| 372 | if (err < 0) |
| 373 | vdc_finish(&port->vio, err, WAITING_FOR_ANY); |
| 374 | spin_unlock_irqrestore(&vio->lock, flags); |
| 375 | } |
| 376 | |
| 377 | static int __vdc_tx_trigger(struct vdc_port *port) |
| 378 | { |
| 379 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
| 380 | struct vio_dring_data hdr = { |
| 381 | .tag = { |
| 382 | .type = VIO_TYPE_DATA, |
| 383 | .stype = VIO_SUBTYPE_INFO, |
| 384 | .stype_env = VIO_DRING_DATA, |
| 385 | .sid = vio_send_sid(&port->vio), |
| 386 | }, |
| 387 | .dring_ident = dr->ident, |
| 388 | .start_idx = dr->prod, |
| 389 | .end_idx = dr->prod, |
| 390 | }; |
| 391 | int err, delay; |
| 392 | |
| 393 | hdr.seq = dr->snd_nxt; |
| 394 | delay = 1; |
| 395 | do { |
| 396 | err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr)); |
| 397 | if (err > 0) { |
| 398 | dr->snd_nxt++; |
| 399 | break; |
| 400 | } |
| 401 | udelay(delay); |
| 402 | if ((delay <<= 1) > 128) |
| 403 | delay = 128; |
| 404 | } while (err == -EAGAIN); |
| 405 | |
| 406 | return err; |
| 407 | } |
| 408 | |
| 409 | static int __send_request(struct request *req) |
| 410 | { |
| 411 | struct vdc_port *port = req->rq_disk->private_data; |
| 412 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
| 413 | struct scatterlist sg[port->ring_cookies]; |
| 414 | struct vdc_req_entry *rqe; |
| 415 | struct vio_disk_desc *desc; |
| 416 | unsigned int map_perm; |
| 417 | int nsg, err, i; |
| 418 | u64 len; |
| 419 | u8 op; |
| 420 | |
| 421 | map_perm = LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_IO; |
| 422 | |
| 423 | if (rq_data_dir(req) == READ) { |
| 424 | map_perm |= LDC_MAP_W; |
| 425 | op = VD_OP_BREAD; |
| 426 | } else { |
| 427 | map_perm |= LDC_MAP_R; |
| 428 | op = VD_OP_BWRITE; |
| 429 | } |
| 430 | |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 431 | sg_init_table(sg, port->ring_cookies); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 432 | nsg = blk_rq_map_sg(req->q, req, sg); |
| 433 | |
| 434 | len = 0; |
| 435 | for (i = 0; i < nsg; i++) |
| 436 | len += sg[i].length; |
| 437 | |
| 438 | if (unlikely(vdc_tx_dring_avail(dr) < 1)) { |
| 439 | blk_stop_queue(port->disk->queue); |
| 440 | err = -ENOMEM; |
| 441 | goto out; |
| 442 | } |
| 443 | |
| 444 | desc = vio_dring_cur(dr); |
| 445 | |
| 446 | err = ldc_map_sg(port->vio.lp, sg, nsg, |
| 447 | desc->cookies, port->ring_cookies, |
| 448 | map_perm); |
| 449 | if (err < 0) { |
| 450 | printk(KERN_ERR PFX "ldc_map_sg() failure, err=%d.\n", err); |
| 451 | return err; |
| 452 | } |
| 453 | |
| 454 | rqe = &port->rq_arr[dr->prod]; |
| 455 | rqe->req = req; |
| 456 | |
| 457 | desc->hdr.ack = VIO_ACK_ENABLE; |
| 458 | desc->req_id = port->req_id; |
| 459 | desc->operation = op; |
| 460 | if (port->vdisk_type == VD_DISK_TYPE_DISK) { |
David S. Miller | 1bd4b28 | 2007-08-24 22:05:44 -0700 | [diff] [blame] | 461 | desc->slice = 0xff; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 462 | } else { |
| 463 | desc->slice = 0; |
| 464 | } |
| 465 | desc->status = ~0; |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 466 | desc->offset = (blk_rq_pos(req) << 9) / port->vdisk_block_size; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 467 | desc->size = len; |
| 468 | desc->ncookies = err; |
| 469 | |
| 470 | /* This has to be a non-SMP write barrier because we are writing |
| 471 | * to memory which is shared with the peer LDOM. |
| 472 | */ |
| 473 | wmb(); |
| 474 | desc->hdr.state = VIO_DESC_READY; |
| 475 | |
| 476 | err = __vdc_tx_trigger(port); |
| 477 | if (err < 0) { |
| 478 | printk(KERN_ERR PFX "vdc_tx_trigger() failure, err=%d\n", err); |
| 479 | } else { |
| 480 | port->req_id++; |
| 481 | dr->prod = (dr->prod + 1) & (VDC_TX_RING_SIZE - 1); |
| 482 | } |
| 483 | out: |
| 484 | |
| 485 | return err; |
| 486 | } |
| 487 | |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 488 | static void do_vdc_request(struct request_queue *q) |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 489 | { |
| 490 | while (1) { |
Tejun Heo | 9934c8c | 2009-05-08 11:54:16 +0900 | [diff] [blame] | 491 | struct request *req = blk_fetch_request(q); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 492 | |
| 493 | if (!req) |
| 494 | break; |
| 495 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 496 | if (__send_request(req) < 0) |
Tejun Heo | 04420850 | 2009-04-28 13:06:08 +0900 | [diff] [blame] | 497 | __blk_end_request_all(req, -EIO); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 498 | } |
| 499 | } |
| 500 | |
| 501 | static int generic_request(struct vdc_port *port, u8 op, void *buf, int len) |
| 502 | { |
| 503 | struct vio_dring_state *dr; |
| 504 | struct vio_completion comp; |
| 505 | struct vio_disk_desc *desc; |
| 506 | unsigned int map_perm; |
| 507 | unsigned long flags; |
| 508 | int op_len, err; |
| 509 | void *req_buf; |
| 510 | |
David S. Miller | f4d9605 | 2013-02-14 11:49:01 -0800 | [diff] [blame] | 511 | if (!(((u64)1 << (u64)op) & port->operations)) |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 512 | return -EOPNOTSUPP; |
| 513 | |
| 514 | switch (op) { |
| 515 | case VD_OP_BREAD: |
| 516 | case VD_OP_BWRITE: |
| 517 | default: |
| 518 | return -EINVAL; |
| 519 | |
| 520 | case VD_OP_FLUSH: |
| 521 | op_len = 0; |
| 522 | map_perm = 0; |
| 523 | break; |
| 524 | |
| 525 | case VD_OP_GET_WCE: |
| 526 | op_len = sizeof(u32); |
| 527 | map_perm = LDC_MAP_W; |
| 528 | break; |
| 529 | |
| 530 | case VD_OP_SET_WCE: |
| 531 | op_len = sizeof(u32); |
| 532 | map_perm = LDC_MAP_R; |
| 533 | break; |
| 534 | |
| 535 | case VD_OP_GET_VTOC: |
| 536 | op_len = sizeof(struct vio_disk_vtoc); |
| 537 | map_perm = LDC_MAP_W; |
| 538 | break; |
| 539 | |
| 540 | case VD_OP_SET_VTOC: |
| 541 | op_len = sizeof(struct vio_disk_vtoc); |
| 542 | map_perm = LDC_MAP_R; |
| 543 | break; |
| 544 | |
| 545 | case VD_OP_GET_DISKGEOM: |
| 546 | op_len = sizeof(struct vio_disk_geom); |
| 547 | map_perm = LDC_MAP_W; |
| 548 | break; |
| 549 | |
| 550 | case VD_OP_SET_DISKGEOM: |
| 551 | op_len = sizeof(struct vio_disk_geom); |
| 552 | map_perm = LDC_MAP_R; |
| 553 | break; |
| 554 | |
| 555 | case VD_OP_SCSICMD: |
| 556 | op_len = 16; |
| 557 | map_perm = LDC_MAP_RW; |
| 558 | break; |
| 559 | |
| 560 | case VD_OP_GET_DEVID: |
| 561 | op_len = sizeof(struct vio_disk_devid); |
| 562 | map_perm = LDC_MAP_W; |
| 563 | break; |
| 564 | |
| 565 | case VD_OP_GET_EFI: |
| 566 | case VD_OP_SET_EFI: |
| 567 | return -EOPNOTSUPP; |
| 568 | break; |
| 569 | }; |
| 570 | |
| 571 | map_perm |= LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_IO; |
| 572 | |
| 573 | op_len = (op_len + 7) & ~7; |
| 574 | req_buf = kzalloc(op_len, GFP_KERNEL); |
| 575 | if (!req_buf) |
| 576 | return -ENOMEM; |
| 577 | |
| 578 | if (len > op_len) |
| 579 | len = op_len; |
| 580 | |
| 581 | if (map_perm & LDC_MAP_R) |
| 582 | memcpy(req_buf, buf, len); |
| 583 | |
| 584 | spin_lock_irqsave(&port->vio.lock, flags); |
| 585 | |
| 586 | dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
| 587 | |
| 588 | /* XXX If we want to use this code generically we have to |
| 589 | * XXX handle TX ring exhaustion etc. |
| 590 | */ |
| 591 | desc = vio_dring_cur(dr); |
| 592 | |
| 593 | err = ldc_map_single(port->vio.lp, req_buf, op_len, |
| 594 | desc->cookies, port->ring_cookies, |
| 595 | map_perm); |
| 596 | if (err < 0) { |
| 597 | spin_unlock_irqrestore(&port->vio.lock, flags); |
| 598 | kfree(req_buf); |
| 599 | return err; |
| 600 | } |
| 601 | |
| 602 | init_completion(&comp.com); |
| 603 | comp.waiting_for = WAITING_FOR_GEN_CMD; |
| 604 | port->vio.cmp = ∁ |
| 605 | |
| 606 | desc->hdr.ack = VIO_ACK_ENABLE; |
| 607 | desc->req_id = port->req_id; |
| 608 | desc->operation = op; |
| 609 | desc->slice = 0; |
| 610 | desc->status = ~0; |
| 611 | desc->offset = 0; |
| 612 | desc->size = op_len; |
| 613 | desc->ncookies = err; |
| 614 | |
| 615 | /* This has to be a non-SMP write barrier because we are writing |
| 616 | * to memory which is shared with the peer LDOM. |
| 617 | */ |
| 618 | wmb(); |
| 619 | desc->hdr.state = VIO_DESC_READY; |
| 620 | |
| 621 | err = __vdc_tx_trigger(port); |
| 622 | if (err >= 0) { |
| 623 | port->req_id++; |
| 624 | dr->prod = (dr->prod + 1) & (VDC_TX_RING_SIZE - 1); |
| 625 | spin_unlock_irqrestore(&port->vio.lock, flags); |
| 626 | |
| 627 | wait_for_completion(&comp.com); |
| 628 | err = comp.err; |
| 629 | } else { |
| 630 | port->vio.cmp = NULL; |
| 631 | spin_unlock_irqrestore(&port->vio.lock, flags); |
| 632 | } |
| 633 | |
| 634 | if (map_perm & LDC_MAP_W) |
| 635 | memcpy(buf, req_buf, len); |
| 636 | |
| 637 | kfree(req_buf); |
| 638 | |
| 639 | return err; |
| 640 | } |
| 641 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 642 | static int vdc_alloc_tx_ring(struct vdc_port *port) |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 643 | { |
| 644 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
| 645 | unsigned long len, entry_size; |
| 646 | int ncookies; |
| 647 | void *dring; |
| 648 | |
| 649 | entry_size = sizeof(struct vio_disk_desc) + |
| 650 | (sizeof(struct ldc_trans_cookie) * port->ring_cookies); |
| 651 | len = (VDC_TX_RING_SIZE * entry_size); |
| 652 | |
| 653 | ncookies = VIO_MAX_RING_COOKIES; |
| 654 | dring = ldc_alloc_exp_dring(port->vio.lp, len, |
| 655 | dr->cookies, &ncookies, |
| 656 | (LDC_MAP_SHADOW | |
| 657 | LDC_MAP_DIRECT | |
| 658 | LDC_MAP_RW)); |
| 659 | if (IS_ERR(dring)) |
| 660 | return PTR_ERR(dring); |
| 661 | |
| 662 | dr->base = dring; |
| 663 | dr->entry_size = entry_size; |
| 664 | dr->num_entries = VDC_TX_RING_SIZE; |
| 665 | dr->prod = dr->cons = 0; |
| 666 | dr->pending = VDC_TX_RING_SIZE; |
| 667 | dr->ncookies = ncookies; |
| 668 | |
| 669 | return 0; |
| 670 | } |
| 671 | |
| 672 | static void vdc_free_tx_ring(struct vdc_port *port) |
| 673 | { |
| 674 | struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING]; |
| 675 | |
| 676 | if (dr->base) { |
| 677 | ldc_free_exp_dring(port->vio.lp, dr->base, |
| 678 | (dr->entry_size * dr->num_entries), |
| 679 | dr->cookies, dr->ncookies); |
| 680 | dr->base = NULL; |
| 681 | dr->entry_size = 0; |
| 682 | dr->num_entries = 0; |
| 683 | dr->pending = 0; |
| 684 | dr->ncookies = 0; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | static int probe_disk(struct vdc_port *port) |
| 689 | { |
| 690 | struct vio_completion comp; |
| 691 | struct request_queue *q; |
| 692 | struct gendisk *g; |
| 693 | int err; |
| 694 | |
| 695 | init_completion(&comp.com); |
| 696 | comp.err = 0; |
| 697 | comp.waiting_for = WAITING_FOR_LINK_UP; |
| 698 | port->vio.cmp = ∁ |
| 699 | |
| 700 | vio_port_up(&port->vio); |
| 701 | |
| 702 | wait_for_completion(&comp.com); |
| 703 | if (comp.err) |
| 704 | return comp.err; |
| 705 | |
| 706 | err = generic_request(port, VD_OP_GET_VTOC, |
| 707 | &port->label, sizeof(port->label)); |
| 708 | if (err < 0) { |
| 709 | printk(KERN_ERR PFX "VD_OP_GET_VTOC returns error %d\n", err); |
| 710 | return err; |
| 711 | } |
| 712 | |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 713 | if (vdc_version_supported(port, 1, 1)) { |
| 714 | /* vdisk_size should be set during the handshake, if it wasn't |
| 715 | * then the underlying disk is reserved by another system |
| 716 | */ |
| 717 | if (port->vdisk_size == -1) |
| 718 | return -ENODEV; |
| 719 | } else { |
Allen Pais | de5b73f | 2014-09-19 09:42:26 -0400 | [diff] [blame^] | 720 | struct vio_disk_geom geom; |
| 721 | |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 722 | err = generic_request(port, VD_OP_GET_DISKGEOM, |
Allen Pais | de5b73f | 2014-09-19 09:42:26 -0400 | [diff] [blame^] | 723 | &geom, sizeof(geom)); |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 724 | if (err < 0) { |
| 725 | printk(KERN_ERR PFX "VD_OP_GET_DISKGEOM returns " |
| 726 | "error %d\n", err); |
| 727 | return err; |
| 728 | } |
Allen Pais | de5b73f | 2014-09-19 09:42:26 -0400 | [diff] [blame^] | 729 | port->vdisk_size = ((u64)geom.num_cyl * |
| 730 | (u64)geom.num_hd * |
| 731 | (u64)geom.num_sec); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 732 | } |
| 733 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 734 | q = blk_init_queue(do_vdc_request, &port->vio.lock); |
| 735 | if (!q) { |
| 736 | printk(KERN_ERR PFX "%s: Could not allocate queue.\n", |
| 737 | port->vio.name); |
| 738 | return -ENOMEM; |
| 739 | } |
| 740 | g = alloc_disk(1 << PARTITION_SHIFT); |
| 741 | if (!g) { |
| 742 | printk(KERN_ERR PFX "%s: Could not allocate gendisk.\n", |
| 743 | port->vio.name); |
| 744 | blk_cleanup_queue(q); |
| 745 | return -ENOMEM; |
| 746 | } |
| 747 | |
| 748 | port->disk = g; |
| 749 | |
Martin K. Petersen | 8a78362 | 2010-02-26 00:20:39 -0500 | [diff] [blame] | 750 | blk_queue_max_segments(q, port->ring_cookies); |
Martin K. Petersen | 086fa5f | 2010-02-26 00:20:38 -0500 | [diff] [blame] | 751 | blk_queue_max_hw_sectors(q, port->max_xfer_size); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 752 | g->major = vdc_major; |
David S. Miller | 91ba3c2 | 2007-07-18 15:15:45 -0700 | [diff] [blame] | 753 | g->first_minor = port->vio.vdev->dev_no << PARTITION_SHIFT; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 754 | strcpy(g->disk_name, port->disk_name); |
| 755 | |
| 756 | g->fops = &vdc_fops; |
| 757 | g->queue = q; |
| 758 | g->private_data = port; |
| 759 | g->driverfs_dev = &port->vio.vdev->dev; |
| 760 | |
| 761 | set_capacity(g, port->vdisk_size); |
| 762 | |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 763 | if (vdc_version_supported(port, 1, 1)) { |
| 764 | switch (port->vdisk_mtype) { |
| 765 | case VD_MEDIA_TYPE_CD: |
| 766 | pr_info(PFX "Virtual CDROM %s\n", port->disk_name); |
| 767 | g->flags |= GENHD_FL_CD; |
| 768 | g->flags |= GENHD_FL_REMOVABLE; |
| 769 | set_disk_ro(g, 1); |
| 770 | break; |
| 771 | |
| 772 | case VD_MEDIA_TYPE_DVD: |
| 773 | pr_info(PFX "Virtual DVD %s\n", port->disk_name); |
| 774 | g->flags |= GENHD_FL_CD; |
| 775 | g->flags |= GENHD_FL_REMOVABLE; |
| 776 | set_disk_ro(g, 1); |
| 777 | break; |
| 778 | |
| 779 | case VD_MEDIA_TYPE_FIXED: |
| 780 | pr_info(PFX "Virtual Hard disk %s\n", port->disk_name); |
| 781 | break; |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | pr_info(PFX "%s: %u sectors (%u MB) protocol %d.%d\n", |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 786 | g->disk_name, |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 787 | port->vdisk_size, (port->vdisk_size >> (20 - 9)), |
| 788 | port->vio.ver.major, port->vio.ver.minor); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 789 | |
| 790 | add_disk(g); |
| 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | static struct ldc_channel_config vdc_ldc_cfg = { |
| 796 | .event = vdc_event, |
| 797 | .mtu = 64, |
| 798 | .mode = LDC_MODE_UNRELIABLE, |
| 799 | }; |
| 800 | |
| 801 | static struct vio_driver_ops vdc_vio_ops = { |
| 802 | .send_attr = vdc_send_attr, |
| 803 | .handle_attr = vdc_handle_attr, |
| 804 | .handshake_complete = vdc_handshake_complete, |
| 805 | }; |
| 806 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 807 | static void print_version(void) |
David S. Miller | 80dc35d | 2007-07-17 21:46:00 -0700 | [diff] [blame] | 808 | { |
| 809 | static int version_printed; |
| 810 | |
| 811 | if (version_printed++ == 0) |
| 812 | printk(KERN_INFO "%s", version); |
| 813 | } |
| 814 | |
Greg Kroah-Hartman | 8d85fce | 2012-12-21 15:13:49 -0800 | [diff] [blame] | 815 | static int vdc_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 816 | { |
David S. Miller | 43fdf27 | 2007-07-12 13:47:50 -0700 | [diff] [blame] | 817 | struct mdesc_handle *hp; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 818 | struct vdc_port *port; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 819 | int err; |
| 820 | |
David S. Miller | 80dc35d | 2007-07-17 21:46:00 -0700 | [diff] [blame] | 821 | print_version(); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 822 | |
David S. Miller | 43fdf27 | 2007-07-12 13:47:50 -0700 | [diff] [blame] | 823 | hp = mdesc_grab(); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 824 | |
David S. Miller | 43fdf27 | 2007-07-12 13:47:50 -0700 | [diff] [blame] | 825 | err = -ENODEV; |
David S. Miller | 91ba3c2 | 2007-07-18 15:15:45 -0700 | [diff] [blame] | 826 | if ((vdev->dev_no << PARTITION_SHIFT) & ~(u64)MINORMASK) { |
Sam Ravnborg | 3f4528d | 2009-01-06 13:20:38 -0800 | [diff] [blame] | 827 | printk(KERN_ERR PFX "Port id [%llu] too large.\n", |
David S. Miller | 91ba3c2 | 2007-07-18 15:15:45 -0700 | [diff] [blame] | 828 | vdev->dev_no); |
David S. Miller | 43fdf27 | 2007-07-12 13:47:50 -0700 | [diff] [blame] | 829 | goto err_out_release_mdesc; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 830 | } |
| 831 | |
| 832 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
David S. Miller | 43fdf27 | 2007-07-12 13:47:50 -0700 | [diff] [blame] | 833 | err = -ENOMEM; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 834 | if (!port) { |
| 835 | printk(KERN_ERR PFX "Cannot allocate vdc_port.\n"); |
David S. Miller | 43fdf27 | 2007-07-12 13:47:50 -0700 | [diff] [blame] | 836 | goto err_out_release_mdesc; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 837 | } |
| 838 | |
David S. Miller | 91ba3c2 | 2007-07-18 15:15:45 -0700 | [diff] [blame] | 839 | if (vdev->dev_no >= 26) |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 840 | snprintf(port->disk_name, sizeof(port->disk_name), |
| 841 | VDCBLK_NAME "%c%c", |
David S. Miller | 91ba3c2 | 2007-07-18 15:15:45 -0700 | [diff] [blame] | 842 | 'a' + ((int)vdev->dev_no / 26) - 1, |
| 843 | 'a' + ((int)vdev->dev_no % 26)); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 844 | else |
| 845 | snprintf(port->disk_name, sizeof(port->disk_name), |
David S. Miller | 91ba3c2 | 2007-07-18 15:15:45 -0700 | [diff] [blame] | 846 | VDCBLK_NAME "%c", 'a' + ((int)vdev->dev_no % 26)); |
Allen Pais | 9bce218 | 2014-09-19 09:42:14 -0400 | [diff] [blame] | 847 | port->vdisk_size = -1; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 848 | |
David S. Miller | 43fdf27 | 2007-07-12 13:47:50 -0700 | [diff] [blame] | 849 | err = vio_driver_init(&port->vio, vdev, VDEV_DISK, |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 850 | vdc_versions, ARRAY_SIZE(vdc_versions), |
| 851 | &vdc_vio_ops, port->disk_name); |
| 852 | if (err) |
| 853 | goto err_out_free_port; |
| 854 | |
| 855 | port->vdisk_block_size = 512; |
| 856 | port->max_xfer_size = ((128 * 1024) / port->vdisk_block_size); |
| 857 | port->ring_cookies = ((port->max_xfer_size * |
| 858 | port->vdisk_block_size) / PAGE_SIZE) + 2; |
| 859 | |
| 860 | err = vio_ldc_alloc(&port->vio, &vdc_ldc_cfg, port); |
| 861 | if (err) |
| 862 | goto err_out_free_port; |
| 863 | |
| 864 | err = vdc_alloc_tx_ring(port); |
| 865 | if (err) |
| 866 | goto err_out_free_ldc; |
| 867 | |
| 868 | err = probe_disk(port); |
| 869 | if (err) |
| 870 | goto err_out_free_tx_ring; |
| 871 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 872 | dev_set_drvdata(&vdev->dev, port); |
| 873 | |
David S. Miller | 43fdf27 | 2007-07-12 13:47:50 -0700 | [diff] [blame] | 874 | mdesc_release(hp); |
| 875 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 876 | return 0; |
| 877 | |
| 878 | err_out_free_tx_ring: |
| 879 | vdc_free_tx_ring(port); |
| 880 | |
| 881 | err_out_free_ldc: |
| 882 | vio_ldc_free(&port->vio); |
| 883 | |
| 884 | err_out_free_port: |
| 885 | kfree(port); |
| 886 | |
David S. Miller | 43fdf27 | 2007-07-12 13:47:50 -0700 | [diff] [blame] | 887 | err_out_release_mdesc: |
| 888 | mdesc_release(hp); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 889 | return err; |
| 890 | } |
| 891 | |
| 892 | static int vdc_port_remove(struct vio_dev *vdev) |
| 893 | { |
| 894 | struct vdc_port *port = dev_get_drvdata(&vdev->dev); |
| 895 | |
| 896 | if (port) { |
| 897 | del_timer_sync(&port->vio.timer); |
| 898 | |
| 899 | vdc_free_tx_ring(port); |
| 900 | vio_ldc_free(&port->vio); |
| 901 | |
| 902 | dev_set_drvdata(&vdev->dev, NULL); |
| 903 | |
| 904 | kfree(port); |
| 905 | } |
| 906 | return 0; |
| 907 | } |
| 908 | |
David S. Miller | 3d452e5 | 2008-09-01 01:48:52 -0700 | [diff] [blame] | 909 | static const struct vio_device_id vdc_port_match[] = { |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 910 | { |
| 911 | .type = "vdc-port", |
| 912 | }, |
| 913 | {}, |
| 914 | }; |
Fabio Massimo Di Nitto | da68e08 | 2007-07-18 14:35:23 -0700 | [diff] [blame] | 915 | MODULE_DEVICE_TABLE(vio, vdc_port_match); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 916 | |
| 917 | static struct vio_driver vdc_port_driver = { |
| 918 | .id_table = vdc_port_match, |
| 919 | .probe = vdc_port_probe, |
| 920 | .remove = vdc_port_remove, |
Benjamin Herrenschmidt | cb52d89 | 2012-03-26 19:06:30 +0000 | [diff] [blame] | 921 | .name = "vdc_port", |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 922 | }; |
| 923 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 924 | static int __init vdc_init(void) |
| 925 | { |
| 926 | int err; |
| 927 | |
| 928 | err = register_blkdev(0, VDCBLK_NAME); |
| 929 | if (err < 0) |
| 930 | goto out_err; |
| 931 | |
| 932 | vdc_major = err; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 933 | |
| 934 | err = vio_register_driver(&vdc_port_driver); |
| 935 | if (err) |
David S. Miller | 80dc35d | 2007-07-17 21:46:00 -0700 | [diff] [blame] | 936 | goto out_unregister_blkdev; |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 937 | |
| 938 | return 0; |
| 939 | |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 940 | out_unregister_blkdev: |
| 941 | unregister_blkdev(vdc_major, VDCBLK_NAME); |
| 942 | vdc_major = 0; |
| 943 | |
| 944 | out_err: |
| 945 | return err; |
| 946 | } |
| 947 | |
| 948 | static void __exit vdc_exit(void) |
| 949 | { |
| 950 | vio_unregister_driver(&vdc_port_driver); |
David S. Miller | 667ef3c | 2007-07-16 04:03:56 -0700 | [diff] [blame] | 951 | unregister_blkdev(vdc_major, VDCBLK_NAME); |
| 952 | } |
| 953 | |
| 954 | module_init(vdc_init); |
| 955 | module_exit(vdc_exit); |