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af86526b KC |
1 | /* virtpci.c |
2 | * | |
f6d0c1e6 | 3 | * Copyright (C) 2010 - 2013 UNISYS CORPORATION |
af86526b KC |
4 | * All rights reserved. |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or (at | |
9 | * your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
14 | * NON INFRINGEMENT. See the GNU General Public License for more | |
15 | * details. | |
16 | */ | |
17 | ||
18 | #define EXPORT_SYMTAB | |
19 | ||
20 | #include <linux/kernel.h> | |
21 | #ifdef CONFIG_MODVERSIONS | |
22 | #include <config/modversions.h> | |
23 | #endif | |
24 | #include "uniklog.h" | |
25 | #include "diagnostics/appos_subsystems.h" | |
26 | #include "uisutils.h" | |
af86526b KC |
27 | #include "vbuschannel.h" |
28 | #include "vbushelper.h" | |
1d2def98 BR |
29 | #include <linux/types.h> |
30 | #include <linux/io.h> | |
31 | #include <linux/uuid.h> | |
af86526b KC |
32 | #include <linux/module.h> |
33 | #include <linux/init.h> | |
34 | #include <linux/pci.h> | |
35 | #include <linux/device.h> | |
36 | #include <linux/list.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/mod_devicetable.h> | |
af86526b KC |
39 | #include <linux/if_ether.h> |
40 | #include <linux/version.h> | |
0f9e5301 | 41 | #include <linux/debugfs.h> |
af86526b KC |
42 | #include "version.h" |
43 | #include "guestlinuxdebug.h" | |
e3f3b1f2 | 44 | #include "timskmod.h" |
af86526b KC |
45 | |
46 | struct driver_private { | |
47 | struct kobject kobj; | |
48 | struct klist klist_devices; | |
49 | struct klist_node knode_bus; | |
50 | struct module_kobject *mkobj; | |
51 | struct device_driver *driver; | |
52 | }; | |
425ebd0a | 53 | |
af86526b KC |
54 | #define to_driver(obj) container_of(obj, struct driver_private, kobj) |
55 | ||
56 | /* bus_id went away in 2.6.30 - the size was 20 bytes, so we'll define | |
57 | * it ourselves, and a macro to make getting the field a bit simpler. | |
58 | */ | |
59 | #ifndef BUS_ID_SIZE | |
60 | #define BUS_ID_SIZE 20 | |
61 | #endif | |
62 | ||
63 | #define BUS_ID(x) dev_name(x) | |
64 | ||
0f9e5301 EA |
65 | /* MAX_BUF = 4 busses x ( 32 devices/bus + 1 busline) x 80 characters |
66 | * = 10,560 bytes ~ 2^14 = 16,384 bytes | |
67 | */ | |
68 | #define MAX_BUF 16384 | |
69 | ||
af86526b KC |
70 | #include "virtpci.h" |
71 | ||
72 | /* this is shorter than using __FILE__ (full path name) in | |
73 | * debug/info/error messages | |
74 | */ | |
75 | #define CURRENT_FILE_PC VIRT_PCI_PC_virtpci_c | |
76 | #define __MYFILE__ "virtpci.c" | |
77 | ||
78 | #define VIRTPCI_VERSION "01.00" | |
79 | ||
80 | /*****************************************************/ | |
81 | /* Forward declarations */ | |
82 | /*****************************************************/ | |
83 | ||
84 | static int delete_vbus_device(struct device *vbus, void *data); | |
85 | static int match_busid(struct device *dev, void *data); | |
86 | static void virtpci_bus_release(struct device *dev); | |
87 | static void virtpci_device_release(struct device *dev); | |
88 | static int virtpci_device_add(struct device *parentbus, int devtype, | |
89 | struct add_virt_guestpart *addparams, | |
90 | struct scsi_adap_info *scsi, | |
91 | struct net_adap_info *net); | |
92 | static int virtpci_device_del(struct device *parentbus, int devtype, | |
93 | struct vhba_wwnn *wwnn, unsigned char macaddr[]); | |
94 | static int virtpci_device_serverdown(struct device *parentbus, int devtype, | |
95 | struct vhba_wwnn *wwnn, | |
96 | unsigned char macaddr[]); | |
97 | static int virtpci_device_serverup(struct device *parentbus, int devtype, | |
98 | struct vhba_wwnn *wwnn, | |
99 | unsigned char macaddr[]); | |
100 | static ssize_t virtpci_driver_attr_show(struct kobject *kobj, | |
101 | struct attribute *attr, char *buf); | |
102 | static ssize_t virtpci_driver_attr_store(struct kobject *kobj, | |
103 | struct attribute *attr, | |
104 | const char *buf, size_t count); | |
105 | static int virtpci_bus_match(struct device *dev, struct device_driver *drv); | |
106 | static int virtpci_uevent(struct device *dev, struct kobj_uevent_env *env); | |
af86526b KC |
107 | static int virtpci_device_probe(struct device *dev); |
108 | static int virtpci_device_remove(struct device *dev); | |
af86526b | 109 | |
0f9e5301 | 110 | static ssize_t info_debugfs_read(struct file *file, char __user *buf, |
197ac858 | 111 | size_t len, loff_t *offset); |
0f9e5301 EA |
112 | |
113 | static const struct file_operations debugfs_info_fops = { | |
114 | .read = info_debugfs_read, | |
115 | }; | |
af86526b KC |
116 | |
117 | /*****************************************************/ | |
118 | /* Globals */ | |
119 | /*****************************************************/ | |
120 | ||
121 | /* methods in bus_type struct allow the bus code to serve as an | |
122 | * intermediary between the device core and individual device core and | |
123 | * individual drivers | |
124 | */ | |
125 | static struct bus_type virtpci_bus_type = { | |
126 | .name = "uisvirtpci", | |
127 | .match = virtpci_bus_match, | |
128 | .uevent = virtpci_uevent, | |
af86526b KC |
129 | }; |
130 | ||
131 | static struct device virtpci_rootbus_device = { | |
132 | .init_name = "vbusroot", /* root bus */ | |
133 | .release = virtpci_bus_release | |
134 | }; | |
135 | ||
136 | /* filled in with info about parent chipset driver when we register with it */ | |
09b0e276 | 137 | static struct ultra_vbus_deviceinfo chipset_driver_info; |
af86526b KC |
138 | |
139 | static const struct sysfs_ops virtpci_driver_sysfs_ops = { | |
140 | .show = virtpci_driver_attr_show, | |
141 | .store = virtpci_driver_attr_store, | |
142 | }; | |
143 | ||
144 | static struct kobj_type virtpci_driver_kobj_type = { | |
145 | .sysfs_ops = &virtpci_driver_sysfs_ops, | |
146 | }; | |
147 | ||
8a7281b2 | 148 | static struct virtpci_dev *vpcidev_list_head; |
4ecd8281 | 149 | static DEFINE_RWLOCK(vpcidev_list_lock); |
af86526b KC |
150 | |
151 | /* filled in with info about this driver, wrt it servicing client busses */ | |
e322528d | 152 | static struct ultra_vbus_deviceinfo bus_driver_info; |
af86526b | 153 | |
0f9e5301 EA |
154 | /*****************************************************/ |
155 | /* debugfs entries */ | |
156 | /*****************************************************/ | |
157 | /* dentry is used to create the debugfs entry directory | |
158 | * for virtpci | |
159 | */ | |
160 | static struct dentry *virtpci_debugfs_dir; | |
af86526b KC |
161 | |
162 | struct virtpci_busdev { | |
163 | struct device virtpci_bus_device; | |
164 | }; | |
165 | ||
166 | /*****************************************************/ | |
167 | /* Local functions */ | |
168 | /*****************************************************/ | |
169 | ||
a8d7f21d | 170 | static inline |
bedc756e | 171 | int WAIT_FOR_IO_CHANNEL(struct spar_io_channel_protocol __iomem *chanptr) |
af86526b KC |
172 | { |
173 | int count = 120; | |
1cd36ed5 | 174 | |
af86526b | 175 | while (count > 0) { |
bedc756e | 176 | if (SPAR_CHANNEL_SERVER_READY(&chanptr->channel_header)) |
af86526b KC |
177 | return 1; |
178 | UIS_THREAD_WAIT_SEC(1); | |
179 | count--; | |
180 | } | |
181 | return 0; | |
182 | } | |
183 | ||
184 | /* Write the contents of <info> to the ULTRA_VBUS_CHANNEL_PROTOCOL.ChpInfo. */ | |
442ab1df BT |
185 | static int write_vbus_chp_info(struct spar_vbus_channel_protocol *chan, |
186 | struct ultra_vbus_deviceinfo *info) | |
af86526b KC |
187 | { |
188 | int off; | |
1cd36ed5 | 189 | |
0aca7844 | 190 | if (!chan) |
af86526b | 191 | return -1; |
0aca7844 | 192 | |
a02fd66e BR |
193 | off = sizeof(struct channel_header) + chan->hdr_info.chp_info_offset; |
194 | if (chan->hdr_info.chp_info_offset == 0) { | |
af86526b KC |
195 | return -1; |
196 | } | |
15c76967 | 197 | memcpy(((u8 *)(chan)) + off, info, sizeof(*info)); |
af86526b KC |
198 | return 0; |
199 | } | |
200 | ||
201 | /* Write the contents of <info> to the ULTRA_VBUS_CHANNEL_PROTOCOL.BusInfo. */ | |
b820d030 BT |
202 | static int write_vbus_bus_info(struct spar_vbus_channel_protocol *chan, |
203 | struct ultra_vbus_deviceinfo *info) | |
af86526b KC |
204 | { |
205 | int off; | |
1cd36ed5 | 206 | |
0aca7844 | 207 | if (!chan) |
af86526b | 208 | return -1; |
0aca7844 | 209 | |
a02fd66e | 210 | off = sizeof(struct channel_header) + chan->hdr_info.bus_info_offset; |
0aca7844 | 211 | if (chan->hdr_info.bus_info_offset == 0) |
af86526b | 212 | return -1; |
15c76967 | 213 | memcpy(((u8 *)(chan)) + off, info, sizeof(*info)); |
af86526b KC |
214 | return 0; |
215 | } | |
216 | ||
217 | /* Write the contents of <info> to the | |
218 | * ULTRA_VBUS_CHANNEL_PROTOCOL.DevInfo[<devix>]. | |
219 | */ | |
220 | static int | |
57fd9199 BT |
221 | write_vbus_dev_info(struct spar_vbus_channel_protocol *chan, |
222 | struct ultra_vbus_deviceinfo *info, int devix) | |
af86526b KC |
223 | { |
224 | int off; | |
1cd36ed5 | 225 | |
0aca7844 | 226 | if (!chan) |
af86526b | 227 | return -1; |
0aca7844 | 228 | |
af86526b | 229 | off = |
9fd1b95a | 230 | (sizeof(struct channel_header) + |
a02fd66e BR |
231 | chan->hdr_info.dev_info_offset) + |
232 | (chan->hdr_info.device_info_struct_bytes * devix); | |
0aca7844 | 233 | if (chan->hdr_info.dev_info_offset == 0) |
af86526b | 234 | return -1; |
0aca7844 | 235 | |
15c76967 | 236 | memcpy(((u8 *)(chan)) + off, info, sizeof(*info)); |
af86526b KC |
237 | return 0; |
238 | } | |
239 | ||
240 | /* adds a vbus | |
241 | * returns 0 failure, 1 success, | |
242 | */ | |
243 | static int add_vbus(struct add_vbus_guestpart *addparams) | |
244 | { | |
245 | int ret; | |
246 | struct device *vbus; | |
1cd36ed5 | 247 | |
732bf988 | 248 | vbus = kzalloc(sizeof(*vbus), GFP_ATOMIC); |
af86526b KC |
249 | |
250 | POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
251 | if (!vbus) | |
252 | return 0; | |
253 | ||
34e6230b | 254 | dev_set_name(vbus, "vbus%d", addparams->bus_no); |
af86526b KC |
255 | vbus->release = virtpci_bus_release; |
256 | vbus->parent = &virtpci_rootbus_device; /* root bus is parent */ | |
257 | vbus->bus = &virtpci_bus_type; /* bus type */ | |
a8d7f21d | 258 | vbus->platform_data = (__force void *)addparams->chanptr; |
af86526b KC |
259 | |
260 | /* register a virt bus device - | |
261 | * this bus shows up under /sys/devices with .name value | |
262 | * "virtpci%d" any devices added to this bus then show up under | |
263 | * /sys/devices/virtpci0 | |
264 | */ | |
265 | ret = device_register(vbus); | |
266 | if (ret) { | |
af86526b KC |
267 | POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); |
268 | return 0; | |
269 | } | |
29d58624 | 270 | write_vbus_chp_info(vbus->platform_data /* chanptr */, |
442ab1df | 271 | &chipset_driver_info); |
29d58624 | 272 | write_vbus_bus_info(vbus->platform_data /* chanptr */, |
b820d030 | 273 | &bus_driver_info); |
af86526b KC |
274 | POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); |
275 | return 1; | |
276 | } | |
277 | ||
278 | /* for CHANSOCK wwwnn/max are AUTO-GENERATED; for normal channels, | |
279 | * wwnn/max are in the channel header. | |
280 | */ | |
a8d7f21d KC |
281 | #define GET_SCSIADAPINFO_FROM_CHANPTR(chanptr) { \ |
282 | memcpy_fromio(&scsi.wwnn, \ | |
bedc756e | 283 | &((struct spar_io_channel_protocol __iomem *) \ |
a8d7f21d KC |
284 | chanptr)->vhba.wwnn, \ |
285 | sizeof(struct vhba_wwnn)); \ | |
286 | memcpy_fromio(&scsi.max, \ | |
bedc756e | 287 | &((struct spar_io_channel_protocol __iomem *) \ |
a8d7f21d KC |
288 | chanptr)->vhba.max, \ |
289 | sizeof(struct vhba_config_max)); \ | |
290 | } | |
af86526b | 291 | |
af86526b KC |
292 | /* adds a vhba |
293 | * returns 0 failure, 1 success, | |
294 | */ | |
295 | static int add_vhba(struct add_virt_guestpart *addparams) | |
296 | { | |
297 | int i; | |
298 | struct scsi_adap_info scsi; | |
299 | struct device *vbus; | |
300 | unsigned char busid[BUS_ID_SIZE]; | |
301 | ||
302 | POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
303 | if (!WAIT_FOR_IO_CHANNEL | |
15c76967 | 304 | ((struct spar_io_channel_protocol __iomem *)addparams->chanptr)) { |
af86526b KC |
305 | POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); |
306 | return 0; | |
307 | } | |
308 | ||
309 | GET_SCSIADAPINFO_FROM_CHANPTR(addparams->chanptr); | |
310 | ||
8f846b51 BT |
311 | /* find bus device with the busid that matches match_busid */ |
312 | sprintf(busid, "vbus%d", addparams->bus_no); | |
313 | vbus = bus_find_device(&virtpci_bus_type, NULL, | |
314 | (void *)busid, match_busid); | |
0aca7844 | 315 | if (!vbus) |
8f846b51 | 316 | return 0; |
af86526b | 317 | |
af86526b KC |
318 | i = virtpci_device_add(vbus, VIRTHBA_TYPE, addparams, &scsi, NULL); |
319 | if (i) { | |
af86526b KC |
320 | POSTCODE_LINUX_3(VPCI_CREATE_EXIT_PC, i, |
321 | POSTCODE_SEVERITY_INFO); | |
322 | } | |
323 | return i; | |
af86526b KC |
324 | } |
325 | ||
326 | /* for CHANSOCK macaddr is AUTO-GENERATED; for normal channels, | |
327 | * macaddr is in the channel header. | |
328 | */ | |
a8d7f21d KC |
329 | #define GET_NETADAPINFO_FROM_CHANPTR(chanptr) { \ |
330 | memcpy_fromio(net.mac_addr, \ | |
bedc756e | 331 | ((struct spar_io_channel_protocol __iomem *) \ |
15c76967 | 332 | chanptr)->vnic.macaddr, \ |
a8d7f21d KC |
333 | MAX_MACADDR_LEN); \ |
334 | net.num_rcv_bufs = \ | |
bedc756e | 335 | readl(&((struct spar_io_channel_protocol __iomem *)\ |
15c76967 | 336 | chanptr)->vnic.num_rcv_bufs); \ |
bedc756e | 337 | net.mtu = readl(&((struct spar_io_channel_protocol __iomem *) \ |
15c76967 | 338 | chanptr)->vnic.mtu); \ |
5689de90 | 339 | memcpy_fromio(&net.zone_uuid, \ |
bedc756e | 340 | &((struct spar_io_channel_protocol __iomem *)\ |
15c76967 | 341 | chanptr)->vnic.zone_uuid, \ |
90addb02 | 342 | sizeof(uuid_le)); \ |
af86526b KC |
343 | } |
344 | ||
345 | /* adds a vnic | |
346 | * returns 0 failure, 1 success, | |
347 | */ | |
348 | static int | |
349 | add_vnic(struct add_virt_guestpart *addparams) | |
350 | { | |
351 | int i; | |
352 | struct net_adap_info net; | |
353 | struct device *vbus; | |
354 | unsigned char busid[BUS_ID_SIZE]; | |
355 | ||
356 | POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
357 | if (!WAIT_FOR_IO_CHANNEL | |
15c76967 | 358 | ((struct spar_io_channel_protocol __iomem *)addparams->chanptr)) { |
af86526b KC |
359 | POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); |
360 | return 0; | |
361 | } | |
362 | ||
363 | GET_NETADAPINFO_FROM_CHANPTR(addparams->chanptr); | |
364 | ||
8f846b51 BT |
365 | /* find bus device with the busid that matches match_busid */ |
366 | sprintf(busid, "vbus%d", addparams->bus_no); | |
367 | vbus = bus_find_device(&virtpci_bus_type, NULL, | |
368 | (void *)busid, match_busid); | |
0aca7844 | 369 | if (!vbus) |
8f846b51 | 370 | return 0; |
af86526b | 371 | |
af86526b KC |
372 | i = virtpci_device_add(vbus, VIRTNIC_TYPE, addparams, NULL, &net); |
373 | if (i) { | |
af86526b KC |
374 | POSTCODE_LINUX_3(VPCI_CREATE_EXIT_PC, i, |
375 | POSTCODE_SEVERITY_INFO); | |
376 | return 1; | |
377 | } | |
378 | return 0; | |
379 | } | |
380 | ||
381 | /* delete vbus | |
382 | * returns 0 failure, 1 success, | |
383 | */ | |
384 | static int | |
385 | delete_vbus(struct del_vbus_guestpart *delparams) | |
386 | { | |
387 | struct device *vbus; | |
388 | unsigned char busid[BUS_ID_SIZE]; | |
389 | ||
8f846b51 BT |
390 | /* find bus device with the busid that matches match_busid */ |
391 | sprintf(busid, "vbus%d", delparams->bus_no); | |
392 | vbus = bus_find_device(&virtpci_bus_type, NULL, | |
393 | (void *)busid, match_busid); | |
0aca7844 | 394 | if (!vbus) |
8f846b51 | 395 | return 0; |
8f846b51 | 396 | |
af86526b | 397 | /* ensure that bus has no devices? -- TBD */ |
af86526b KC |
398 | return 1; |
399 | } | |
400 | ||
401 | static int | |
402 | delete_vbus_device(struct device *vbus, void *data) | |
403 | { | |
404 | int checkforroot = (data != NULL); | |
865cde93 | 405 | struct device *dev = &virtpci_rootbus_device; |
af86526b | 406 | |
865cde93 | 407 | if ((checkforroot) && match_busid(vbus, (void *)BUS_ID(dev))) { |
af86526b | 408 | /* skip it - don't delete root bus */ |
af86526b KC |
409 | return 0; /* pretend no error */ |
410 | } | |
af86526b KC |
411 | device_unregister(vbus); |
412 | kfree(vbus); | |
af86526b KC |
413 | return 0; /* no error */ |
414 | } | |
415 | ||
416 | /* pause vhba | |
417 | * returns 0 failure, 1 success, | |
418 | */ | |
419 | static int pause_vhba(struct pause_virt_guestpart *pauseparams) | |
420 | { | |
421 | int i; | |
422 | struct scsi_adap_info scsi; | |
423 | ||
424 | GET_SCSIADAPINFO_FROM_CHANPTR(pauseparams->chanptr); | |
425 | ||
29d58624 | 426 | i = virtpci_device_serverdown(NULL /*no parent bus */, VIRTHBA_TYPE, |
af86526b | 427 | &scsi.wwnn, NULL); |
af86526b KC |
428 | return i; |
429 | } | |
430 | ||
431 | /* pause vnic | |
432 | * returns 0 failure, 1 success, | |
433 | */ | |
434 | static int pause_vnic(struct pause_virt_guestpart *pauseparams) | |
435 | { | |
436 | int i; | |
437 | struct net_adap_info net; | |
438 | ||
439 | GET_NETADAPINFO_FROM_CHANPTR(pauseparams->chanptr); | |
440 | ||
29d58624 | 441 | i = virtpci_device_serverdown(NULL /*no parent bus */, VIRTNIC_TYPE, |
af86526b | 442 | NULL, net.mac_addr); |
af86526b KC |
443 | return i; |
444 | } | |
445 | ||
446 | /* resume vhba | |
447 | * returns 0 failure, 1 success, | |
448 | */ | |
449 | static int resume_vhba(struct resume_virt_guestpart *resumeparams) | |
450 | { | |
451 | int i; | |
452 | struct scsi_adap_info scsi; | |
453 | ||
454 | GET_SCSIADAPINFO_FROM_CHANPTR(resumeparams->chanptr); | |
455 | ||
29d58624 | 456 | i = virtpci_device_serverup(NULL /*no parent bus */, VIRTHBA_TYPE, |
af86526b | 457 | &scsi.wwnn, NULL); |
af86526b KC |
458 | return i; |
459 | } | |
460 | ||
461 | /* resume vnic | |
462 | * returns 0 failure, 1 success, | |
463 | */ | |
464 | static int | |
465 | resume_vnic(struct resume_virt_guestpart *resumeparams) | |
466 | { | |
467 | int i; | |
468 | struct net_adap_info net; | |
469 | ||
470 | GET_NETADAPINFO_FROM_CHANPTR(resumeparams->chanptr); | |
471 | ||
29d58624 | 472 | i = virtpci_device_serverup(NULL /*no parent bus */, VIRTNIC_TYPE, |
af86526b | 473 | NULL, net.mac_addr); |
af86526b KC |
474 | return i; |
475 | } | |
476 | ||
477 | /* delete vhba | |
478 | * returns 0 failure, 1 success, | |
479 | */ | |
480 | static int delete_vhba(struct del_virt_guestpart *delparams) | |
481 | { | |
482 | int i; | |
483 | struct scsi_adap_info scsi; | |
484 | ||
485 | GET_SCSIADAPINFO_FROM_CHANPTR(delparams->chanptr); | |
486 | ||
29d58624 | 487 | i = virtpci_device_del(NULL /*no parent bus */, VIRTHBA_TYPE, |
af86526b KC |
488 | &scsi.wwnn, NULL); |
489 | if (i) { | |
af86526b KC |
490 | return 1; |
491 | } | |
492 | return 0; | |
493 | } | |
494 | ||
495 | /* deletes a vnic | |
496 | * returns 0 failure, 1 success, | |
497 | */ | |
498 | static int delete_vnic(struct del_virt_guestpart *delparams) | |
499 | { | |
500 | int i; | |
501 | struct net_adap_info net; | |
502 | ||
503 | GET_NETADAPINFO_FROM_CHANPTR(delparams->chanptr); | |
504 | ||
29d58624 | 505 | i = virtpci_device_del(NULL /*no parent bus */, VIRTNIC_TYPE, NULL, |
af86526b | 506 | net.mac_addr); |
af86526b KC |
507 | return i; |
508 | } | |
509 | ||
510 | #define DELETE_ONE_VPCIDEV(vpcidev) { \ | |
af86526b | 511 | device_unregister(&vpcidev->generic_dev); \ |
af86526b KC |
512 | kfree(vpcidev); \ |
513 | } | |
514 | ||
515 | /* deletes all vhbas and vnics | |
516 | * returns 0 failure, 1 success, | |
517 | */ | |
518 | static void delete_all(void) | |
519 | { | |
520 | int count = 0; | |
521 | unsigned long flags; | |
522 | struct virtpci_dev *tmpvpcidev, *nextvpcidev; | |
523 | ||
524 | /* delete the entire vhba/vnic list in one shot */ | |
4ecd8281 | 525 | write_lock_irqsave(&vpcidev_list_lock, flags); |
8a7281b2 BT |
526 | tmpvpcidev = vpcidev_list_head; |
527 | vpcidev_list_head = NULL; | |
4ecd8281 | 528 | write_unlock_irqrestore(&vpcidev_list_lock, flags); |
af86526b KC |
529 | |
530 | /* delete one vhba/vnic at a time */ | |
531 | while (tmpvpcidev) { | |
532 | nextvpcidev = tmpvpcidev->next; | |
533 | /* delete the vhba/vnic at tmpvpcidev */ | |
534 | DELETE_ONE_VPCIDEV(tmpvpcidev); | |
535 | tmpvpcidev = nextvpcidev; | |
536 | count++; | |
537 | } | |
af86526b KC |
538 | |
539 | /* now delete each vbus */ | |
2098dbd1 BR |
540 | bus_for_each_dev(&virtpci_bus_type, NULL, (void *)1, |
541 | delete_vbus_device); | |
af86526b KC |
542 | } |
543 | ||
544 | /* deletes all vnics or vhbas | |
545 | * returns 0 failure, 1 success, | |
546 | */ | |
2a73a82d BR |
547 | static int delete_all_virt(enum virtpci_dev_type devtype, |
548 | struct del_vbus_guestpart *delparams) | |
af86526b KC |
549 | { |
550 | int i; | |
551 | unsigned char busid[BUS_ID_SIZE]; | |
552 | struct device *vbus; | |
553 | ||
8f846b51 BT |
554 | /* find bus device with the busid that matches match_busid */ |
555 | sprintf(busid, "vbus%d", delparams->bus_no); | |
556 | vbus = bus_find_device(&virtpci_bus_type, NULL, | |
557 | (void *)busid, match_busid); | |
0aca7844 | 558 | if (!vbus) |
8f846b51 | 559 | return 0; |
af86526b | 560 | |
0aca7844 | 561 | if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) |
af86526b | 562 | return 0; |
af86526b | 563 | |
af86526b KC |
564 | /* delete all vhbas/vnics */ |
565 | i = virtpci_device_del(vbus, devtype, NULL, NULL); | |
af86526b KC |
566 | return 1; |
567 | } | |
568 | ||
569 | static int virtpci_ctrlchan_func(struct guest_msgs *msg) | |
570 | { | |
571 | switch (msg->msgtype) { | |
572 | case GUEST_ADD_VBUS: | |
573 | return add_vbus(&msg->add_vbus); | |
574 | case GUEST_ADD_VHBA: | |
575 | return add_vhba(&msg->add_vhba); | |
576 | case GUEST_ADD_VNIC: | |
577 | return add_vnic(&msg->add_vnic); | |
578 | case GUEST_DEL_VBUS: | |
579 | return delete_vbus(&msg->del_vbus); | |
580 | case GUEST_DEL_VHBA: | |
581 | return delete_vhba(&msg->del_vhba); | |
582 | case GUEST_DEL_VNIC: | |
583 | return delete_vnic(&msg->del_vhba); | |
584 | case GUEST_DEL_ALL_VHBAS: | |
585 | return delete_all_virt(VIRTHBA_TYPE, &msg->del_all_vhbas); | |
586 | case GUEST_DEL_ALL_VNICS: | |
587 | return delete_all_virt(VIRTNIC_TYPE, &msg->del_all_vnics); | |
588 | case GUEST_DEL_ALL_VBUSES: | |
589 | delete_all(); | |
590 | return 1; | |
591 | case GUEST_PAUSE_VHBA: | |
592 | return pause_vhba(&msg->pause_vhba); | |
593 | case GUEST_PAUSE_VNIC: | |
594 | return pause_vnic(&msg->pause_vnic); | |
595 | case GUEST_RESUME_VHBA: | |
596 | return resume_vhba(&msg->resume_vhba); | |
597 | case GUEST_RESUME_VNIC: | |
598 | return resume_vnic(&msg->resume_vnic); | |
599 | default: | |
af86526b KC |
600 | return 0; |
601 | } | |
602 | } | |
603 | ||
604 | /* same as driver_helper in bus.c linux */ | |
605 | static int match_busid(struct device *dev, void *data) | |
606 | { | |
607 | const char *name = data; | |
608 | ||
609 | if (strcmp(name, BUS_ID(dev)) == 0) | |
610 | return 1; | |
611 | return 0; | |
612 | } | |
613 | ||
614 | /*****************************************************/ | |
615 | /* Bus functions */ | |
616 | /*****************************************************/ | |
617 | ||
a8d7f21d | 618 | static const struct pci_device_id * |
af86526b KC |
619 | virtpci_match_device(const struct pci_device_id *ids, |
620 | const struct virtpci_dev *dev) | |
621 | { | |
622 | while (ids->vendor || ids->subvendor || ids->class_mask) { | |
65b96899 BT |
623 | if ((ids->vendor == dev->vendor) && |
624 | (ids->device == dev->device)) | |
af86526b KC |
625 | return ids; |
626 | ||
627 | ids++; | |
628 | } | |
629 | return NULL; | |
630 | } | |
631 | ||
632 | /* NOTE: !!!!!! This function is called when a new device is added | |
633 | * for this bus. Or, it is called for existing devices when a new | |
634 | * driver is added for this bus. It returns nonzero if a given device | |
635 | * can be handled by the given driver. | |
636 | */ | |
637 | static int virtpci_bus_match(struct device *dev, struct device_driver *drv) | |
638 | { | |
639 | struct virtpci_dev *virtpcidev = device_to_virtpci_dev(dev); | |
640 | struct virtpci_driver *virtpcidrv = driver_to_virtpci_driver(drv); | |
641 | int match = 0; | |
642 | ||
af86526b KC |
643 | /* check ids list for a match */ |
644 | if (virtpci_match_device(virtpcidrv->id_table, virtpcidev)) | |
645 | match = 1; | |
646 | ||
af86526b KC |
647 | return match; /* 0 - no match; 1 - yes it matches */ |
648 | } | |
649 | ||
650 | static int virtpci_uevent(struct device *dev, struct kobj_uevent_env *env) | |
651 | { | |
af86526b KC |
652 | /* add variables to the environment prior to the generation of |
653 | * hotplug events to user space | |
654 | */ | |
655 | if (add_uevent_var(env, "VIRTPCI_VERSION=%s", VIRTPCI_VERSION)) | |
656 | return -ENOMEM; | |
657 | return 0; | |
658 | } | |
659 | ||
af86526b KC |
660 | /* For a child device just created on a client bus, fill in |
661 | * information about the driver that is controlling this device into | |
9b0a6292 | 662 | * the appropriate slot within the vbus channel of the bus |
af86526b KC |
663 | * instance. |
664 | */ | |
ceddd0b3 | 665 | static void fix_vbus_dev_info(struct device *dev, int dev_no, int dev_type, |
d13b23b8 | 666 | struct virtpci_driver *virtpcidrv) |
af86526b KC |
667 | { |
668 | struct device *vbus; | |
a87606c7 BT |
669 | void *chan; |
670 | struct ultra_vbus_deviceinfo dev_info; | |
af86526b KC |
671 | const char *stype; |
672 | ||
0aca7844 | 673 | if (!dev) |
af86526b | 674 | return; |
0aca7844 | 675 | if (!virtpcidrv) |
af86526b | 676 | return; |
0aca7844 | 677 | |
af86526b | 678 | vbus = dev->parent; |
0aca7844 | 679 | if (!vbus) |
af86526b | 680 | return; |
0aca7844 | 681 | |
a87606c7 | 682 | chan = vbus->platform_data; |
0aca7844 | 683 | if (!chan) |
af86526b | 684 | return; |
0aca7844 | 685 | |
ceddd0b3 | 686 | switch (dev_type) { |
af86526b KC |
687 | case PCI_DEVICE_ID_VIRTHBA: |
688 | stype = "vHBA"; | |
689 | break; | |
690 | case PCI_DEVICE_ID_VIRTNIC: | |
691 | stype = "vNIC"; | |
692 | break; | |
693 | default: | |
694 | stype = "unknown"; | |
695 | break; | |
696 | } | |
a87606c7 | 697 | bus_device_info_init(&dev_info, stype, |
197ac858 BT |
698 | virtpcidrv->name, |
699 | virtpcidrv->version, | |
700 | virtpcidrv->vertag); | |
a87606c7 | 701 | write_vbus_dev_info(chan, &dev_info, dev_no); |
af86526b KC |
702 | |
703 | /* Re-write bus+chipset info, because it is possible that this | |
704 | * was previously written by our good counterpart, visorbus. | |
705 | */ | |
a87606c7 BT |
706 | write_vbus_chp_info(chan, &chipset_driver_info); |
707 | write_vbus_bus_info(chan, &bus_driver_info); | |
af86526b KC |
708 | } |
709 | ||
710 | /* This function is called to query the existence of a specific device | |
711 | * and whether this driver can work with it. It should return -ENODEV | |
712 | * in case of failure. | |
713 | */ | |
714 | static int virtpci_device_probe(struct device *dev) | |
715 | { | |
716 | struct virtpci_dev *virtpcidev = device_to_virtpci_dev(dev); | |
717 | struct virtpci_driver *virtpcidrv = | |
718 | driver_to_virtpci_driver(dev->driver); | |
719 | const struct pci_device_id *id; | |
720 | int error = 0; | |
721 | ||
af86526b KC |
722 | POSTCODE_LINUX_2(VPCI_PROBE_ENTRY_PC, POSTCODE_SEVERITY_INFO); |
723 | /* static match and static probe vs dynamic match & dynamic | |
724 | * probe - do we care?. | |
725 | */ | |
726 | if (!virtpcidrv->id_table) | |
727 | return -ENODEV; | |
728 | ||
729 | id = virtpci_match_device(virtpcidrv->id_table, virtpcidev); | |
730 | if (!id) | |
731 | return -ENODEV; | |
732 | ||
733 | /* increment reference count */ | |
734 | get_device(dev); | |
735 | ||
736 | /* if virtpcidev is not already claimed & probe function is | |
737 | * valid, probe it | |
738 | */ | |
739 | if (!virtpcidev->mydriver && virtpcidrv->probe) { | |
740 | /* call the probe function - virthba or virtnic probe | |
741 | * is what it should be | |
742 | */ | |
743 | error = virtpcidrv->probe(virtpcidev, id); | |
744 | if (!error) { | |
d13b23b8 BT |
745 | fix_vbus_dev_info(dev, virtpcidev->device_no, |
746 | virtpcidev->device, virtpcidrv); | |
af86526b KC |
747 | virtpcidev->mydriver = virtpcidrv; |
748 | POSTCODE_LINUX_2(VPCI_PROBE_EXIT_PC, | |
749 | POSTCODE_SEVERITY_INFO); | |
5e7590ee | 750 | } else { |
af86526b | 751 | put_device(dev); |
5e7590ee | 752 | } |
af86526b KC |
753 | } |
754 | POSTCODE_LINUX_2(VPCI_PROBE_FAILURE_PC, POSTCODE_SEVERITY_ERR); | |
755 | return error; /* -ENODEV for probe failure */ | |
756 | } | |
757 | ||
758 | static int virtpci_device_remove(struct device *dev_) | |
759 | { | |
760 | /* dev_ passed in is the HBA device which we called | |
761 | * generic_dev in our virtpcidev struct | |
762 | */ | |
763 | struct virtpci_dev *virtpcidev = device_to_virtpci_dev(dev_); | |
764 | struct virtpci_driver *virtpcidrv = virtpcidev->mydriver; | |
1cd36ed5 | 765 | |
af86526b KC |
766 | if (virtpcidrv) { |
767 | /* TEMP: assuming we have only one such driver for now */ | |
768 | if (virtpcidrv->remove) | |
769 | virtpcidrv->remove(virtpcidev); | |
770 | virtpcidev->mydriver = NULL; | |
771 | } | |
772 | ||
af86526b | 773 | put_device(dev_); |
af86526b KC |
774 | return 0; |
775 | } | |
776 | ||
777 | /*****************************************************/ | |
778 | /* Bus functions */ | |
779 | /*****************************************************/ | |
780 | ||
781 | static void virtpci_bus_release(struct device *dev) | |
782 | { | |
af86526b KC |
783 | } |
784 | ||
785 | /*****************************************************/ | |
786 | /* Adapter functions */ | |
787 | /*****************************************************/ | |
788 | ||
60444139 BT |
789 | /* scsi is expected to be NULL for VNIC add |
790 | * net is expected to be NULL for VHBA add | |
791 | */ | |
af86526b KC |
792 | static int virtpci_device_add(struct device *parentbus, int devtype, |
793 | struct add_virt_guestpart *addparams, | |
60444139 BT |
794 | struct scsi_adap_info *scsi, |
795 | struct net_adap_info *net) | |
af86526b KC |
796 | { |
797 | struct virtpci_dev *virtpcidev = NULL; | |
798 | struct virtpci_dev *tmpvpcidev = NULL, *prev; | |
799 | unsigned long flags; | |
800 | int ret; | |
c159921f BT |
801 | struct spar_io_channel_protocol __iomem *io_chan = NULL; |
802 | struct device *dev; | |
af86526b | 803 | |
af86526b KC |
804 | POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); |
805 | ||
806 | if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) { | |
af86526b KC |
807 | POSTCODE_LINUX_3(VPCI_CREATE_FAILURE_PC, devtype, |
808 | POSTCODE_SEVERITY_ERR); | |
809 | return 0; | |
810 | } | |
811 | ||
812 | /* add a Virtual Device */ | |
732bf988 | 813 | virtpcidev = kzalloc(sizeof(*virtpcidev), GFP_ATOMIC); |
af86526b | 814 | if (virtpcidev == NULL) { |
af86526b KC |
815 | POSTCODE_LINUX_2(MALLOC_FAILURE_PC, POSTCODE_SEVERITY_ERR); |
816 | return 0; | |
817 | } | |
818 | ||
af86526b KC |
819 | /* initialize stuff unique to virtpci_dev struct */ |
820 | virtpcidev->devtype = devtype; | |
821 | if (devtype == VIRTHBA_TYPE) { | |
822 | virtpcidev->device = PCI_DEVICE_ID_VIRTHBA; | |
823 | virtpcidev->scsi = *scsi; | |
824 | } else { | |
825 | virtpcidev->device = PCI_DEVICE_ID_VIRTNIC; | |
826 | virtpcidev->net = *net; | |
827 | } | |
828 | virtpcidev->vendor = PCI_VENDOR_ID_UNISYS; | |
55f714cd BR |
829 | virtpcidev->bus_no = addparams->bus_no; |
830 | virtpcidev->device_no = addparams->device_no; | |
af86526b KC |
831 | |
832 | virtpcidev->queueinfo.chan = addparams->chanptr; | |
833 | virtpcidev->queueinfo.send_int_if_needed = NULL; | |
834 | ||
835 | /* Set up safe queue... */ | |
c159921f | 836 | io_chan = (struct spar_io_channel_protocol __iomem *) |
a8d7f21d | 837 | virtpcidev->queueinfo.chan; |
af86526b KC |
838 | |
839 | virtpcidev->intr = addparams->intr; | |
840 | ||
841 | /* initialize stuff in the device portion of the struct */ | |
842 | virtpcidev->generic_dev.bus = &virtpci_bus_type; | |
843 | virtpcidev->generic_dev.parent = parentbus; | |
844 | virtpcidev->generic_dev.release = virtpci_device_release; | |
845 | ||
846 | dev_set_name(&virtpcidev->generic_dev, "%x:%x", | |
8bd352ef | 847 | addparams->bus_no, addparams->device_no); |
af86526b KC |
848 | |
849 | /* add the vhba/vnic to virtpci device list - but check for | |
850 | * duplicate wwnn/macaddr first | |
851 | */ | |
4ecd8281 | 852 | write_lock_irqsave(&vpcidev_list_lock, flags); |
8a7281b2 | 853 | for (tmpvpcidev = vpcidev_list_head; tmpvpcidev; |
af86526b KC |
854 | tmpvpcidev = tmpvpcidev->next) { |
855 | if (devtype == VIRTHBA_TYPE) { | |
856 | if ((tmpvpcidev->scsi.wwnn.wwnn1 == scsi->wwnn.wwnn1) && | |
857 | (tmpvpcidev->scsi.wwnn.wwnn2 == scsi->wwnn.wwnn2)) { | |
858 | /* duplicate - already have vpcidev | |
859 | with this wwnn */ | |
860 | break; | |
861 | } | |
862 | } else | |
863 | if (memcmp | |
864 | (tmpvpcidev->net.mac_addr, net->mac_addr, | |
865 | MAX_MACADDR_LEN) == 0) { | |
866 | /* duplicate - already have vnic with this wwnn */ | |
867 | break; | |
868 | } | |
869 | } | |
870 | if (tmpvpcidev) { | |
871 | /* found a vhba/vnic already in the list with same | |
872 | * wwnn or macaddr - reject add | |
873 | */ | |
4ecd8281 | 874 | write_unlock_irqrestore(&vpcidev_list_lock, flags); |
af86526b | 875 | kfree(virtpcidev); |
af86526b KC |
876 | POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); |
877 | return 0; | |
878 | } | |
879 | ||
880 | /* add it at the head */ | |
8a7281b2 BT |
881 | if (!vpcidev_list_head) { |
882 | vpcidev_list_head = virtpcidev; | |
5e7590ee | 883 | } else { |
af86526b KC |
884 | /* insert virtpcidev at the head of our linked list of |
885 | * vpcidevs | |
886 | */ | |
8a7281b2 BT |
887 | virtpcidev->next = vpcidev_list_head; |
888 | vpcidev_list_head = virtpcidev; | |
af86526b KC |
889 | } |
890 | ||
4ecd8281 | 891 | write_unlock_irqrestore(&vpcidev_list_lock, flags); |
af86526b KC |
892 | |
893 | /* Must transition channel to ATTACHED state BEFORE | |
894 | * registering the device, because polling of the channel | |
895 | * queues can begin at any time after device_register(). | |
896 | */ | |
c159921f | 897 | dev = &virtpcidev->generic_dev; |
ff97a3fd | 898 | SPAR_CHANNEL_CLIENT_TRANSITION(addparams->chanptr, |
c159921f | 899 | BUS_ID(dev), |
ff97a3fd | 900 | CHANNELCLI_ATTACHED, NULL); |
af86526b KC |
901 | |
902 | /* don't register until device has been added to | |
903 | * list. Otherwise, a device_unregister from this function can | |
904 | * cause a "scheduling while atomic". | |
905 | */ | |
af86526b KC |
906 | ret = device_register(&virtpcidev->generic_dev); |
907 | /* NOTE: THIS IS CALLING HOTPLUG virtpci_hotplug!!! | |
908 | * This call to device_register results in virtpci_bus_match | |
909 | * being called !!!!! And, if match returns success, then | |
910 | * virtpcidev->generic_dev.driver is setup to core_driver, | |
911 | * i.e., virtpci and the probe function | |
912 | * virtpcidev->generic_dev.driver->probe is called which | |
913 | * results in virtpci_device_probe being called. And if | |
914 | * virtpci_device_probe is successful | |
915 | */ | |
916 | if (ret) { | |
c159921f | 917 | dev = &virtpcidev->generic_dev; |
ff97a3fd | 918 | SPAR_CHANNEL_CLIENT_TRANSITION(addparams->chanptr, |
c159921f | 919 | BUS_ID(dev), |
ff97a3fd | 920 | CHANNELCLI_DETACHED, NULL); |
af86526b | 921 | /* remove virtpcidev, the one we just added, from the list */ |
4ecd8281 | 922 | write_lock_irqsave(&vpcidev_list_lock, flags); |
8a7281b2 | 923 | for (tmpvpcidev = vpcidev_list_head, prev = NULL; |
af86526b KC |
924 | tmpvpcidev; |
925 | prev = tmpvpcidev, tmpvpcidev = tmpvpcidev->next) { | |
926 | if (tmpvpcidev == virtpcidev) { | |
927 | if (prev) | |
928 | prev->next = tmpvpcidev->next; | |
929 | else | |
8a7281b2 | 930 | vpcidev_list_head = tmpvpcidev->next; |
af86526b KC |
931 | break; |
932 | } | |
933 | } | |
4ecd8281 | 934 | write_unlock_irqrestore(&vpcidev_list_lock, flags); |
af86526b KC |
935 | kfree(virtpcidev); |
936 | return 0; | |
937 | } | |
938 | ||
af86526b KC |
939 | POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); |
940 | return 1; | |
941 | } | |
942 | ||
943 | static int virtpci_device_serverdown(struct device *parentbus, | |
944 | int devtype, | |
945 | struct vhba_wwnn *wwnn, | |
946 | unsigned char macaddr[]) | |
947 | { | |
948 | int pausethisone = 0; | |
949 | bool found = false; | |
950 | struct virtpci_dev *tmpvpcidev, *prevvpcidev; | |
951 | struct virtpci_driver *vpcidriver; | |
952 | unsigned long flags; | |
953 | int rc = 0; | |
954 | ||
0aca7844 | 955 | if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) |
af86526b | 956 | return 0; |
af86526b KC |
957 | |
958 | /* find the vhba or vnic in virtpci device list */ | |
4ecd8281 | 959 | write_lock_irqsave(&vpcidev_list_lock, flags); |
af86526b | 960 | |
8a7281b2 | 961 | for (tmpvpcidev = vpcidev_list_head, prevvpcidev = NULL; |
af86526b KC |
962 | (tmpvpcidev && !found); |
963 | prevvpcidev = tmpvpcidev, tmpvpcidev = tmpvpcidev->next) { | |
964 | if (tmpvpcidev->devtype != devtype) | |
965 | continue; | |
966 | ||
967 | if (devtype == VIRTHBA_TYPE) { | |
968 | pausethisone = | |
969 | ((tmpvpcidev->scsi.wwnn.wwnn1 == wwnn->wwnn1) && | |
970 | (tmpvpcidev->scsi.wwnn.wwnn2 == wwnn->wwnn2)); | |
971 | /* devtype is vhba, we're pausing vhba whose | |
972 | * wwnn matches the current device's wwnn | |
973 | */ | |
974 | } else { /* VIRTNIC_TYPE */ | |
975 | pausethisone = | |
976 | memcmp(tmpvpcidev->net.mac_addr, macaddr, | |
977 | MAX_MACADDR_LEN) == 0; | |
978 | /* devtype is vnic, we're pausing vnic whose | |
979 | * macaddr matches the current device's macaddr */ | |
980 | } | |
981 | ||
982 | if (!pausethisone) | |
983 | continue; | |
984 | ||
985 | found = true; | |
986 | vpcidriver = tmpvpcidev->mydriver; | |
987 | rc = vpcidriver->suspend(tmpvpcidev, 0); | |
988 | } | |
4ecd8281 | 989 | write_unlock_irqrestore(&vpcidev_list_lock, flags); |
af86526b | 990 | |
0aca7844 | 991 | if (!found) |
af86526b | 992 | return 0; |
af86526b KC |
993 | |
994 | return rc; | |
995 | } | |
996 | ||
997 | static int virtpci_device_serverup(struct device *parentbus, | |
998 | int devtype, | |
999 | struct vhba_wwnn *wwnn, | |
1000 | unsigned char macaddr[]) | |
1001 | { | |
1002 | int resumethisone = 0; | |
1003 | bool found = false; | |
1004 | struct virtpci_dev *tmpvpcidev, *prevvpcidev; | |
1005 | struct virtpci_driver *vpcidriver; | |
1006 | unsigned long flags; | |
1007 | int rc = 0; | |
1008 | ||
0aca7844 | 1009 | if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) |
af86526b | 1010 | return 0; |
0aca7844 | 1011 | |
af86526b KC |
1012 | |
1013 | /* find the vhba or vnic in virtpci device list */ | |
4ecd8281 | 1014 | write_lock_irqsave(&vpcidev_list_lock, flags); |
af86526b | 1015 | |
8a7281b2 | 1016 | for (tmpvpcidev = vpcidev_list_head, prevvpcidev = NULL; |
af86526b KC |
1017 | (tmpvpcidev && !found); |
1018 | prevvpcidev = tmpvpcidev, tmpvpcidev = tmpvpcidev->next) { | |
1019 | if (tmpvpcidev->devtype != devtype) | |
1020 | continue; | |
1021 | ||
1022 | if (devtype == VIRTHBA_TYPE) { | |
1023 | resumethisone = | |
1024 | ((tmpvpcidev->scsi.wwnn.wwnn1 == wwnn->wwnn1) && | |
1025 | (tmpvpcidev->scsi.wwnn.wwnn2 == wwnn->wwnn2)); | |
1026 | /* devtype is vhba, we're resuming vhba whose | |
1027 | * wwnn matches the current device's wwnn */ | |
1028 | } else { /* VIRTNIC_TYPE */ | |
1029 | resumethisone = | |
1030 | memcmp(tmpvpcidev->net.mac_addr, macaddr, | |
1031 | MAX_MACADDR_LEN) == 0; | |
1032 | /* devtype is vnic, we're resuming vnic whose | |
1033 | * macaddr matches the current device's macaddr */ | |
1034 | } | |
1035 | ||
1036 | if (!resumethisone) | |
1037 | continue; | |
1038 | ||
1039 | found = true; | |
1040 | vpcidriver = tmpvpcidev->mydriver; | |
1041 | /* This should be done at BUS resume time, but an | |
1042 | * existing problem prevents us from ever getting a bus | |
1043 | * resume... This hack would fail to work should we | |
1044 | * ever have a bus that contains NO devices, since we | |
1045 | * would never even get here in that case. | |
1046 | */ | |
d13b23b8 BT |
1047 | fix_vbus_dev_info(&tmpvpcidev->generic_dev, |
1048 | tmpvpcidev->device_no, | |
1049 | tmpvpcidev->device, vpcidriver); | |
af86526b KC |
1050 | rc = vpcidriver->resume(tmpvpcidev); |
1051 | } | |
1052 | ||
4ecd8281 | 1053 | write_unlock_irqrestore(&vpcidev_list_lock, flags); |
af86526b | 1054 | |
0aca7844 | 1055 | if (!found) |
af86526b | 1056 | return 0; |
af86526b KC |
1057 | |
1058 | return rc; | |
1059 | } | |
1060 | ||
1061 | static int virtpci_device_del(struct device *parentbus, | |
1062 | int devtype, struct vhba_wwnn *wwnn, | |
1063 | unsigned char macaddr[]) | |
1064 | { | |
1065 | int count = 0, all = 0, delthisone; | |
1066 | struct virtpci_dev *tmpvpcidev, *prevvpcidev, *dellist = NULL; | |
1067 | unsigned long flags; | |
1068 | ||
1069 | #define DEL_CONTINUE { \ | |
1070 | prevvpcidev = tmpvpcidev;\ | |
1071 | tmpvpcidev = tmpvpcidev->next;\ | |
1072 | continue; \ | |
1073 | } | |
1074 | ||
0aca7844 | 1075 | if ((devtype != VIRTHBA_TYPE) && (devtype != VIRTNIC_TYPE)) |
af86526b | 1076 | return 0; |
af86526b KC |
1077 | |
1078 | /* see if we are to delete all - NOTE: all implies we have a | |
1079 | * valid parentbus | |
1080 | */ | |
1081 | all = ((devtype == VIRTHBA_TYPE) && (wwnn == NULL)) || | |
1082 | ((devtype == VIRTNIC_TYPE) && (macaddr == NULL)); | |
1083 | ||
1084 | /* find all the vhba or vnic or both in virtpci device list | |
1085 | * keep list of ones we are deleting so we can call | |
1086 | * device_unregister after we release the lock; otherwise we | |
1087 | * encounter "schedule while atomic" | |
1088 | */ | |
4ecd8281 | 1089 | write_lock_irqsave(&vpcidev_list_lock, flags); |
8a7281b2 | 1090 | for (tmpvpcidev = vpcidev_list_head, prevvpcidev = NULL; tmpvpcidev;) { |
af86526b KC |
1091 | if (tmpvpcidev->devtype != devtype) |
1092 | DEL_CONTINUE; | |
1093 | ||
1094 | if (all) { | |
1095 | delthisone = | |
1096 | (tmpvpcidev->generic_dev.parent == parentbus); | |
1097 | /* we're deleting all vhbas or vnics on the | |
1098 | * specified parent bus | |
1099 | */ | |
1100 | } else if (devtype == VIRTHBA_TYPE) { | |
1101 | delthisone = | |
1102 | ((tmpvpcidev->scsi.wwnn.wwnn1 == wwnn->wwnn1) && | |
1103 | (tmpvpcidev->scsi.wwnn.wwnn2 == wwnn->wwnn2)); | |
1104 | /* devtype is vhba, we're deleting vhba whose | |
1105 | * wwnn matches the current device's wwnn | |
1106 | */ | |
1107 | } else { /* VIRTNIC_TYPE */ | |
1108 | delthisone = | |
1109 | memcmp(tmpvpcidev->net.mac_addr, macaddr, | |
1110 | MAX_MACADDR_LEN) == 0; | |
1111 | /* devtype is vnic, we're deleting vnic whose | |
1112 | * macaddr matches the current device's macaddr | |
1113 | */ | |
1114 | } | |
1115 | ||
1116 | if (!delthisone) | |
1117 | DEL_CONTINUE; | |
1118 | ||
1119 | /* take vhba/vnic out of the list */ | |
1120 | if (prevvpcidev) | |
1121 | /* not at head */ | |
1122 | prevvpcidev->next = tmpvpcidev->next; | |
1123 | else | |
8a7281b2 | 1124 | vpcidev_list_head = tmpvpcidev->next; |
af86526b KC |
1125 | |
1126 | /* add it to our deletelist */ | |
1127 | tmpvpcidev->next = dellist; | |
1128 | dellist = tmpvpcidev; | |
1129 | ||
1130 | count++; | |
1131 | if (!all) | |
1132 | break; /* done */ | |
1133 | /* going to top of loop again - set tmpvpcidev to next | |
1134 | * one we're to process | |
1135 | */ | |
1136 | if (prevvpcidev) | |
1137 | tmpvpcidev = prevvpcidev->next; | |
1138 | else | |
8a7281b2 | 1139 | tmpvpcidev = vpcidev_list_head; |
af86526b | 1140 | } |
4ecd8281 | 1141 | write_unlock_irqrestore(&vpcidev_list_lock, flags); |
af86526b | 1142 | |
0aca7844 | 1143 | if (!all && (count == 0)) |
af86526b | 1144 | return 0; |
af86526b KC |
1145 | |
1146 | /* now delete each one from delete list */ | |
1147 | while (dellist) { | |
1148 | /* save next */ | |
1149 | tmpvpcidev = dellist->next; | |
1150 | /* delete the vhba/vnic at dellist */ | |
1151 | DELETE_ONE_VPCIDEV(dellist); | |
1152 | /* do next */ | |
1153 | dellist = tmpvpcidev; | |
1154 | } | |
1155 | ||
1156 | return count; | |
1157 | } | |
1158 | ||
1159 | static void virtpci_device_release(struct device *dev_) | |
1160 | { | |
1161 | /* this function is called when the last reference to the | |
1162 | * device is removed | |
1163 | */ | |
af86526b KC |
1164 | } |
1165 | ||
1166 | /*****************************************************/ | |
1167 | /* Driver functions */ | |
1168 | /*****************************************************/ | |
1169 | ||
1170 | #define kobj_to_device_driver(obj) container_of(obj, struct device_driver, kobj) | |
1171 | #define attribute_to_driver_attribute(obj) \ | |
1172 | container_of(obj, struct driver_attribute, attr) | |
1173 | ||
1174 | static ssize_t virtpci_driver_attr_show(struct kobject *kobj, | |
1175 | struct attribute *attr, | |
1176 | char *buf) | |
1177 | { | |
1178 | struct driver_attribute *dattr = attribute_to_driver_attribute(attr); | |
1179 | ssize_t ret = 0; | |
1180 | ||
1181 | struct driver_private *dprivate = to_driver(kobj); | |
e5f4a331 | 1182 | struct device_driver *driver = dprivate->driver; |
1cd36ed5 | 1183 | |
e5f4a331 RS |
1184 | if (dattr->show) |
1185 | ret = dattr->show(driver, buf); | |
af86526b | 1186 | |
af86526b KC |
1187 | return ret; |
1188 | } | |
1189 | ||
1190 | static ssize_t virtpci_driver_attr_store(struct kobject *kobj, | |
1191 | struct attribute *attr, | |
1192 | const char *buf, size_t count) | |
1193 | { | |
1194 | struct driver_attribute *dattr = attribute_to_driver_attribute(attr); | |
1195 | ssize_t ret = 0; | |
1196 | ||
1197 | struct driver_private *dprivate = to_driver(kobj); | |
e5f4a331 | 1198 | struct device_driver *driver = dprivate->driver; |
af86526b | 1199 | |
e5f4a331 RS |
1200 | if (dattr->store) |
1201 | ret = dattr->store(driver, buf, count); | |
1202 | ||
af86526b KC |
1203 | return ret; |
1204 | } | |
1205 | ||
1206 | /* register a new virtpci driver */ | |
1207 | int virtpci_register_driver(struct virtpci_driver *drv) | |
1208 | { | |
1209 | int result = 0; | |
1210 | ||
0aca7844 | 1211 | if (drv->id_table == NULL) |
af86526b | 1212 | return 1; |
0aca7844 | 1213 | |
af86526b KC |
1214 | /* initialize core driver fields needed to call driver_register */ |
1215 | drv->core_driver.name = drv->name; /* name of driver in sysfs */ | |
1216 | drv->core_driver.bus = &virtpci_bus_type; /* type of bus this | |
1217 | * driver works with */ | |
1218 | drv->core_driver.probe = virtpci_device_probe; /* called to query the | |
1219 | * existence of a | |
1220 | * specific device and | |
1221 | * whether this driver | |
1222 | *can work with it */ | |
1223 | drv->core_driver.remove = virtpci_device_remove; /* called when the | |
1224 | * device is removed | |
1225 | * from the system */ | |
1226 | /* register with core */ | |
1227 | result = driver_register(&drv->core_driver); | |
1228 | /* calls bus_add_driver which calls driver_attach and | |
1229 | * module_add_driver | |
1230 | */ | |
1231 | if (result) | |
1232 | return result; /* failed */ | |
1233 | ||
1234 | drv->core_driver.p->kobj.ktype = &virtpci_driver_kobj_type; | |
1235 | ||
1236 | return 0; | |
1237 | } | |
1238 | EXPORT_SYMBOL_GPL(virtpci_register_driver); | |
1239 | ||
1240 | void virtpci_unregister_driver(struct virtpci_driver *drv) | |
1241 | { | |
af86526b KC |
1242 | driver_unregister(&drv->core_driver); |
1243 | /* driver_unregister calls bus_remove_driver | |
1244 | * bus_remove_driver calls device_detach | |
1245 | * device_detach calls device_release_driver for each of the | |
1246 | * driver's devices | |
1247 | * device_release driver calls drv->remove which is | |
1248 | * virtpci_device_remove | |
1249 | * virtpci_device_remove calls virthba_remove | |
1250 | */ | |
af86526b KC |
1251 | } |
1252 | EXPORT_SYMBOL_GPL(virtpci_unregister_driver); | |
1253 | ||
0f9e5301 EA |
1254 | /*****************************************************/ |
1255 | /* debugfs filesystem functions */ | |
1256 | /*****************************************************/ | |
1257 | struct print_vbus_info { | |
1258 | int *str_pos; | |
1259 | char *buf; | |
1260 | size_t *len; | |
1261 | }; | |
1262 | ||
1263 | static int print_vbus(struct device *vbus, void *data) | |
1264 | { | |
1265 | struct print_vbus_info *p = (struct print_vbus_info *)data; | |
1266 | ||
1267 | *p->str_pos += scnprintf(p->buf + *p->str_pos, *p->len - *p->str_pos, | |
1268 | "bus_id:%s\n", dev_name(vbus)); | |
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | static ssize_t info_debugfs_read(struct file *file, char __user *buf, | |
197ac858 | 1273 | size_t len, loff_t *offset) |
0f9e5301 EA |
1274 | { |
1275 | ssize_t bytes_read = 0; | |
1276 | int str_pos = 0; | |
1277 | struct virtpci_dev *tmpvpcidev; | |
1278 | unsigned long flags; | |
1279 | struct print_vbus_info printparam; | |
1280 | char *vbuf; | |
1281 | ||
1282 | if (len > MAX_BUF) | |
1283 | len = MAX_BUF; | |
1284 | vbuf = kzalloc(len, GFP_KERNEL); | |
1285 | if (!vbuf) | |
1286 | return -ENOMEM; | |
1287 | ||
1288 | str_pos += scnprintf(vbuf + str_pos, len - str_pos, | |
1289 | " Virtual PCI Bus devices\n"); | |
1290 | printparam.str_pos = &str_pos; | |
1291 | printparam.buf = vbuf; | |
1292 | printparam.len = &len; | |
1293 | if (bus_for_each_dev(&virtpci_bus_type, NULL, | |
15c76967 | 1294 | (void *)&printparam, print_vbus)) |
0f9e5301 EA |
1295 | |
1296 | str_pos += scnprintf(vbuf + str_pos, len - str_pos, | |
1297 | "\n Virtual PCI devices\n"); | |
4ecd8281 | 1298 | read_lock_irqsave(&vpcidev_list_lock, flags); |
8a7281b2 | 1299 | tmpvpcidev = vpcidev_list_head; |
0f9e5301 EA |
1300 | while (tmpvpcidev) { |
1301 | if (tmpvpcidev->devtype == VIRTHBA_TYPE) { | |
1302 | str_pos += scnprintf(vbuf + str_pos, len - str_pos, | |
1303 | "[%d:%d] VHba:%08x:%08x max-config:%d-%d-%d-%d", | |
55f714cd BR |
1304 | tmpvpcidev->bus_no, |
1305 | tmpvpcidev->device_no, | |
0f9e5301 EA |
1306 | tmpvpcidev->scsi.wwnn.wwnn1, |
1307 | tmpvpcidev->scsi.wwnn.wwnn2, | |
1308 | tmpvpcidev->scsi.max.max_channel, | |
1309 | tmpvpcidev->scsi.max.max_id, | |
1310 | tmpvpcidev->scsi.max.max_lun, | |
1311 | tmpvpcidev->scsi.max.cmd_per_lun); | |
1312 | } else { | |
1313 | str_pos += scnprintf(vbuf + str_pos, len - str_pos, | |
1314 | "[%d:%d] VNic:%02x:%02x:%02x:%02x:%02x:%02x num_rcv_bufs:%d mtu:%d", | |
55f714cd BR |
1315 | tmpvpcidev->bus_no, |
1316 | tmpvpcidev->device_no, | |
0f9e5301 EA |
1317 | tmpvpcidev->net.mac_addr[0], |
1318 | tmpvpcidev->net.mac_addr[1], | |
1319 | tmpvpcidev->net.mac_addr[2], | |
1320 | tmpvpcidev->net.mac_addr[3], | |
1321 | tmpvpcidev->net.mac_addr[4], | |
1322 | tmpvpcidev->net.mac_addr[5], | |
1323 | tmpvpcidev->net.num_rcv_bufs, | |
1324 | tmpvpcidev->net.mtu); | |
1325 | } | |
1326 | str_pos += scnprintf(vbuf + str_pos, | |
1327 | len - str_pos, " chanptr:%p\n", | |
1328 | tmpvpcidev->queueinfo.chan); | |
1329 | tmpvpcidev = tmpvpcidev->next; | |
1330 | } | |
4ecd8281 | 1331 | read_unlock_irqrestore(&vpcidev_list_lock, flags); |
0f9e5301 EA |
1332 | |
1333 | str_pos += scnprintf(vbuf + str_pos, len - str_pos, "\n"); | |
1334 | bytes_read = simple_read_from_buffer(buf, len, offset, vbuf, str_pos); | |
1335 | kfree(vbuf); | |
1336 | return bytes_read; | |
1337 | } | |
1338 | ||
af86526b KC |
1339 | /*****************************************************/ |
1340 | /* Module Init & Exit functions */ | |
1341 | /*****************************************************/ | |
1342 | ||
1343 | static int __init virtpci_mod_init(void) | |
1344 | { | |
1345 | int ret; | |
1346 | ||
fcd0157e KC |
1347 | if (!unisys_spar_platform) |
1348 | return -ENODEV; | |
1349 | ||
af86526b KC |
1350 | POSTCODE_LINUX_2(VPCI_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO); |
1351 | ||
1352 | ret = bus_register(&virtpci_bus_type); | |
1353 | /* creates /sys/bus/uisvirtpci which contains devices & | |
1354 | * drivers directory | |
1355 | */ | |
1356 | if (ret) { | |
af86526b KC |
1357 | POSTCODE_LINUX_3(VPCI_CREATE_FAILURE_PC, ret, |
1358 | POSTCODE_SEVERITY_ERR); | |
1359 | return ret; | |
1360 | } | |
e322528d | 1361 | bus_device_info_init(&bus_driver_info, "clientbus", "virtpci", |
197ac858 | 1362 | VERSION, NULL); |
af86526b KC |
1363 | |
1364 | /* create a root bus used to parent all the virtpci buses. */ | |
1365 | ret = device_register(&virtpci_rootbus_device); | |
1366 | if (ret) { | |
af86526b KC |
1367 | bus_unregister(&virtpci_bus_type); |
1368 | POSTCODE_LINUX_3(VPCI_CREATE_FAILURE_PC, ret, | |
1369 | POSTCODE_SEVERITY_ERR); | |
1370 | return ret; | |
1371 | } | |
af86526b | 1372 | |
15c76967 | 1373 | if (!uisctrl_register_req_handler(2, (void *)&virtpci_ctrlchan_func, |
09b0e276 | 1374 | &chipset_driver_info)) { |
af86526b KC |
1375 | POSTCODE_LINUX_2(VPCI_CREATE_FAILURE_PC, POSTCODE_SEVERITY_ERR); |
1376 | device_unregister(&virtpci_rootbus_device); | |
1377 | bus_unregister(&virtpci_bus_type); | |
1378 | return -1; | |
1379 | } | |
1380 | ||
0f9e5301 EA |
1381 | /* create debugfs directory and info file inside. */ |
1382 | virtpci_debugfs_dir = debugfs_create_dir("virtpci", NULL); | |
1383 | debugfs_create_file("info", S_IRUSR, virtpci_debugfs_dir, | |
197ac858 | 1384 | NULL, &debugfs_info_fops); |
af86526b KC |
1385 | POSTCODE_LINUX_2(VPCI_CREATE_EXIT_PC, POSTCODE_SEVERITY_INFO); |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | static void __exit virtpci_mod_exit(void) | |
1390 | { | |
af86526b | 1391 | /* unregister the callback function */ |
af86526b KC |
1392 | device_unregister(&virtpci_rootbus_device); |
1393 | bus_unregister(&virtpci_bus_type); | |
0f9e5301 | 1394 | debugfs_remove_recursive(virtpci_debugfs_dir); |
af86526b KC |
1395 | } |
1396 | ||
1397 | module_init(virtpci_mod_init); | |
1398 | module_exit(virtpci_mod_exit); | |
1399 | MODULE_LICENSE("GPL"); | |
1400 | MODULE_AUTHOR("Usha Srinivasan"); | |
1401 | MODULE_ALIAS("uisvirtpci"); | |
1402 |