Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* File veth.c created by Kyle A. Lucke on Mon Aug 7 2000. */ |
| 2 | /* |
| 3 | * IBM eServer iSeries Virtual Ethernet Device Driver |
| 4 | * Copyright (C) 2001 Kyle A. Lucke (klucke@us.ibm.com), IBM Corp. |
| 5 | * Substantially cleaned up by: |
| 6 | * Copyright (C) 2003 David Gibson <dwg@au1.ibm.com>, IBM Corporation. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of the |
| 11 | * License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 21 | * USA |
| 22 | * |
| 23 | * |
| 24 | * This module implements the virtual ethernet device for iSeries LPAR |
| 25 | * Linux. It uses hypervisor message passing to implement an |
| 26 | * ethernet-like network device communicating between partitions on |
| 27 | * the iSeries. |
| 28 | * |
| 29 | * The iSeries LPAR hypervisor currently allows for up to 16 different |
| 30 | * virtual ethernets. These are all dynamically configurable on |
| 31 | * OS/400 partitions, but dynamic configuration is not supported under |
| 32 | * Linux yet. An ethXX network device will be created for each |
| 33 | * virtual ethernet this partition is connected to. |
| 34 | * |
| 35 | * - This driver is responsible for routing packets to and from other |
| 36 | * partitions. The MAC addresses used by the virtual ethernets |
| 37 | * contains meaning and must not be modified. |
| 38 | * |
| 39 | * - Having 2 virtual ethernets to the same remote partition DOES NOT |
| 40 | * double the available bandwidth. The 2 devices will share the |
| 41 | * available hypervisor bandwidth. |
| 42 | * |
| 43 | * - If you send a packet to your own mac address, it will just be |
| 44 | * dropped, you won't get it on the receive side. |
| 45 | * |
| 46 | * - Multicast is implemented by sending the frame frame to every |
| 47 | * other partition. It is the responsibility of the receiving |
| 48 | * partition to filter the addresses desired. |
| 49 | * |
| 50 | * Tunable parameters: |
| 51 | * |
| 52 | * VETH_NUMBUFFERS: This compile time option defaults to 120. It |
| 53 | * controls how much memory Linux will allocate per remote partition |
| 54 | * it is communicating with. It can be thought of as the maximum |
| 55 | * number of packets outstanding to a remote partition at a time. |
| 56 | */ |
| 57 | |
| 58 | #include <linux/config.h> |
| 59 | #include <linux/module.h> |
| 60 | #include <linux/version.h> |
| 61 | #include <linux/types.h> |
| 62 | #include <linux/errno.h> |
| 63 | #include <linux/ioport.h> |
| 64 | #include <linux/kernel.h> |
| 65 | #include <linux/netdevice.h> |
| 66 | #include <linux/etherdevice.h> |
| 67 | #include <linux/skbuff.h> |
| 68 | #include <linux/init.h> |
| 69 | #include <linux/delay.h> |
| 70 | #include <linux/mm.h> |
| 71 | #include <linux/ethtool.h> |
| 72 | #include <asm/iSeries/mf.h> |
| 73 | #include <asm/iSeries/iSeries_pci.h> |
| 74 | #include <asm/uaccess.h> |
| 75 | |
| 76 | #include <asm/iSeries/HvLpConfig.h> |
| 77 | #include <asm/iSeries/HvTypes.h> |
| 78 | #include <asm/iSeries/HvLpEvent.h> |
| 79 | #include <asm/iommu.h> |
| 80 | #include <asm/vio.h> |
| 81 | |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 82 | #undef DEBUG |
| 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | MODULE_AUTHOR("Kyle Lucke <klucke@us.ibm.com>"); |
| 85 | MODULE_DESCRIPTION("iSeries Virtual ethernet driver"); |
| 86 | MODULE_LICENSE("GPL"); |
| 87 | |
Michael Ellerman | 642d1a4 | 2005-09-01 11:29:25 +1000 | [diff] [blame^] | 88 | #define VethEventTypeCap (0) |
| 89 | #define VethEventTypeFrames (1) |
| 90 | #define VethEventTypeMonitor (2) |
| 91 | #define VethEventTypeFramesAck (3) |
| 92 | |
| 93 | #define VETH_MAX_ACKS_PER_MSG (20) |
| 94 | #define VETH_MAX_FRAMES_PER_MSG (6) |
| 95 | |
| 96 | struct VethFramesData { |
| 97 | u32 addr[VETH_MAX_FRAMES_PER_MSG]; |
| 98 | u16 len[VETH_MAX_FRAMES_PER_MSG]; |
| 99 | u32 eofmask; |
| 100 | }; |
| 101 | #define VETH_EOF_SHIFT (32-VETH_MAX_FRAMES_PER_MSG) |
| 102 | |
| 103 | struct VethFramesAckData { |
| 104 | u16 token[VETH_MAX_ACKS_PER_MSG]; |
| 105 | }; |
| 106 | |
| 107 | struct VethCapData { |
| 108 | u8 caps_version; |
| 109 | u8 rsvd1; |
| 110 | u16 num_buffers; |
| 111 | u16 ack_threshold; |
| 112 | u16 rsvd2; |
| 113 | u32 ack_timeout; |
| 114 | u32 rsvd3; |
| 115 | u64 rsvd4[3]; |
| 116 | }; |
| 117 | |
| 118 | struct VethLpEvent { |
| 119 | struct HvLpEvent base_event; |
| 120 | union { |
| 121 | struct VethCapData caps_data; |
| 122 | struct VethFramesData frames_data; |
| 123 | struct VethFramesAckData frames_ack_data; |
| 124 | } u; |
| 125 | |
| 126 | }; |
| 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | #define VETH_NUMBUFFERS (120) |
| 129 | #define VETH_ACKTIMEOUT (1000000) /* microseconds */ |
| 130 | #define VETH_MAX_MCAST (12) |
| 131 | |
| 132 | #define VETH_MAX_MTU (9000) |
| 133 | |
| 134 | #if VETH_NUMBUFFERS < 10 |
| 135 | #define ACK_THRESHOLD (1) |
| 136 | #elif VETH_NUMBUFFERS < 20 |
| 137 | #define ACK_THRESHOLD (4) |
| 138 | #elif VETH_NUMBUFFERS < 40 |
| 139 | #define ACK_THRESHOLD (10) |
| 140 | #else |
| 141 | #define ACK_THRESHOLD (20) |
| 142 | #endif |
| 143 | |
| 144 | #define VETH_STATE_SHUTDOWN (0x0001) |
| 145 | #define VETH_STATE_OPEN (0x0002) |
| 146 | #define VETH_STATE_RESET (0x0004) |
| 147 | #define VETH_STATE_SENTMON (0x0008) |
| 148 | #define VETH_STATE_SENTCAPS (0x0010) |
| 149 | #define VETH_STATE_GOTCAPACK (0x0020) |
| 150 | #define VETH_STATE_GOTCAPS (0x0040) |
| 151 | #define VETH_STATE_SENTCAPACK (0x0080) |
| 152 | #define VETH_STATE_READY (0x0100) |
| 153 | |
| 154 | struct veth_msg { |
| 155 | struct veth_msg *next; |
| 156 | struct VethFramesData data; |
| 157 | int token; |
Michael Ellerman | b08bd5c | 2005-09-01 11:29:06 +1000 | [diff] [blame] | 158 | int in_use; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | struct sk_buff *skb; |
| 160 | struct device *dev; |
| 161 | }; |
| 162 | |
| 163 | struct veth_lpar_connection { |
| 164 | HvLpIndex remote_lp; |
| 165 | struct work_struct statemachine_wq; |
| 166 | struct veth_msg *msgs; |
| 167 | int num_events; |
| 168 | struct VethCapData local_caps; |
| 169 | |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 170 | struct kobject kobject; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | struct timer_list ack_timer; |
| 172 | |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 173 | struct timer_list reset_timer; |
| 174 | unsigned int reset_timeout; |
| 175 | unsigned long last_contact; |
| 176 | int outstanding_tx; |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | spinlock_t lock; |
| 179 | unsigned long state; |
| 180 | HvLpInstanceId src_inst; |
| 181 | HvLpInstanceId dst_inst; |
| 182 | struct VethLpEvent cap_event, cap_ack_event; |
| 183 | u16 pending_acks[VETH_MAX_ACKS_PER_MSG]; |
| 184 | u32 num_pending_acks; |
| 185 | |
| 186 | int num_ack_events; |
| 187 | struct VethCapData remote_caps; |
| 188 | u32 ack_timeout; |
| 189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | struct veth_msg *msg_stack_head; |
| 191 | }; |
| 192 | |
| 193 | struct veth_port { |
| 194 | struct device *dev; |
| 195 | struct net_device_stats stats; |
| 196 | u64 mac_addr; |
| 197 | HvLpIndexMap lpar_map; |
| 198 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 199 | /* queue_lock protects the stopped_map and dev's queue. */ |
| 200 | spinlock_t queue_lock; |
| 201 | HvLpIndexMap stopped_map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 203 | /* mcast_gate protects promiscuous, num_mcast & mcast_addr. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | rwlock_t mcast_gate; |
| 205 | int promiscuous; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | int num_mcast; |
| 207 | u64 mcast_addr[VETH_MAX_MCAST]; |
Michael Ellerman | 07a5c17 | 2005-09-01 11:29:21 +1000 | [diff] [blame] | 208 | |
| 209 | struct kobject kobject; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | }; |
| 211 | |
| 212 | static HvLpIndex this_lp; |
| 213 | static struct veth_lpar_connection *veth_cnx[HVMAXARCHITECTEDLPS]; /* = 0 */ |
| 214 | static struct net_device *veth_dev[HVMAXARCHITECTEDVIRTUALLANS]; /* = 0 */ |
| 215 | |
| 216 | static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev); |
| 217 | static void veth_recycle_msg(struct veth_lpar_connection *, struct veth_msg *); |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 218 | static void veth_wake_queues(struct veth_lpar_connection *cnx); |
| 219 | static void veth_stop_queues(struct veth_lpar_connection *cnx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | static void veth_receive(struct veth_lpar_connection *, struct VethLpEvent *); |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 221 | static void veth_release_connection(struct kobject *kobject); |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 222 | static void veth_timed_ack(unsigned long ptr); |
| 223 | static void veth_timed_reset(unsigned long ptr); |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | /* |
| 226 | * Utility functions |
| 227 | */ |
| 228 | |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 229 | #define veth_info(fmt, args...) \ |
| 230 | printk(KERN_INFO "iseries_veth: " fmt, ## args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
| 232 | #define veth_error(fmt, args...) \ |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 233 | printk(KERN_ERR "iseries_veth: Error: " fmt, ## args) |
| 234 | |
| 235 | #ifdef DEBUG |
| 236 | #define veth_debug(fmt, args...) \ |
| 237 | printk(KERN_DEBUG "iseries_veth: " fmt, ## args) |
| 238 | #else |
| 239 | #define veth_debug(fmt, args...) do {} while (0) |
| 240 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
Michael Ellerman | d7893dd | 2005-09-01 11:29:05 +1000 | [diff] [blame] | 242 | /* You must hold the connection's lock when you call this function. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | static inline void veth_stack_push(struct veth_lpar_connection *cnx, |
| 244 | struct veth_msg *msg) |
| 245 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | msg->next = cnx->msg_stack_head; |
| 247 | cnx->msg_stack_head = msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | } |
| 249 | |
Michael Ellerman | d7893dd | 2005-09-01 11:29:05 +1000 | [diff] [blame] | 250 | /* You must hold the connection's lock when you call this function. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | static inline struct veth_msg *veth_stack_pop(struct veth_lpar_connection *cnx) |
| 252 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | struct veth_msg *msg; |
| 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | msg = cnx->msg_stack_head; |
| 256 | if (msg) |
| 257 | cnx->msg_stack_head = cnx->msg_stack_head->next; |
Michael Ellerman | d7893dd | 2005-09-01 11:29:05 +1000 | [diff] [blame] | 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | return msg; |
| 260 | } |
| 261 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 262 | /* You must hold the connection's lock when you call this function. */ |
| 263 | static inline int veth_stack_is_empty(struct veth_lpar_connection *cnx) |
| 264 | { |
| 265 | return cnx->msg_stack_head == NULL; |
| 266 | } |
| 267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | static inline HvLpEvent_Rc |
| 269 | veth_signalevent(struct veth_lpar_connection *cnx, u16 subtype, |
| 270 | HvLpEvent_AckInd ackind, HvLpEvent_AckType acktype, |
| 271 | u64 token, |
| 272 | u64 data1, u64 data2, u64 data3, u64 data4, u64 data5) |
| 273 | { |
| 274 | return HvCallEvent_signalLpEventFast(cnx->remote_lp, |
| 275 | HvLpEvent_Type_VirtualLan, |
| 276 | subtype, ackind, acktype, |
| 277 | cnx->src_inst, |
| 278 | cnx->dst_inst, |
| 279 | token, data1, data2, data3, |
| 280 | data4, data5); |
| 281 | } |
| 282 | |
| 283 | static inline HvLpEvent_Rc veth_signaldata(struct veth_lpar_connection *cnx, |
| 284 | u16 subtype, u64 token, void *data) |
| 285 | { |
| 286 | u64 *p = (u64 *) data; |
| 287 | |
| 288 | return veth_signalevent(cnx, subtype, HvLpEvent_AckInd_NoAck, |
| 289 | HvLpEvent_AckType_ImmediateAck, |
| 290 | token, p[0], p[1], p[2], p[3], p[4]); |
| 291 | } |
| 292 | |
| 293 | struct veth_allocation { |
| 294 | struct completion c; |
| 295 | int num; |
| 296 | }; |
| 297 | |
| 298 | static void veth_complete_allocation(void *parm, int number) |
| 299 | { |
| 300 | struct veth_allocation *vc = (struct veth_allocation *)parm; |
| 301 | |
| 302 | vc->num = number; |
| 303 | complete(&vc->c); |
| 304 | } |
| 305 | |
| 306 | static int veth_allocate_events(HvLpIndex rlp, int number) |
| 307 | { |
| 308 | struct veth_allocation vc = { COMPLETION_INITIALIZER(vc.c), 0 }; |
| 309 | |
| 310 | mf_allocate_lp_events(rlp, HvLpEvent_Type_VirtualLan, |
| 311 | sizeof(struct VethLpEvent), number, |
| 312 | &veth_complete_allocation, &vc); |
| 313 | wait_for_completion(&vc.c); |
| 314 | |
| 315 | return vc.num; |
| 316 | } |
| 317 | |
| 318 | /* |
Michael Ellerman | 76812d812 | 2005-09-01 11:29:20 +1000 | [diff] [blame] | 319 | * sysfs support |
| 320 | */ |
| 321 | |
| 322 | struct veth_cnx_attribute { |
| 323 | struct attribute attr; |
| 324 | ssize_t (*show)(struct veth_lpar_connection *, char *buf); |
| 325 | ssize_t (*store)(struct veth_lpar_connection *, const char *buf); |
| 326 | }; |
| 327 | |
| 328 | static ssize_t veth_cnx_attribute_show(struct kobject *kobj, |
| 329 | struct attribute *attr, char *buf) |
| 330 | { |
| 331 | struct veth_cnx_attribute *cnx_attr; |
| 332 | struct veth_lpar_connection *cnx; |
| 333 | |
| 334 | cnx_attr = container_of(attr, struct veth_cnx_attribute, attr); |
| 335 | cnx = container_of(kobj, struct veth_lpar_connection, kobject); |
| 336 | |
| 337 | if (!cnx_attr->show) |
| 338 | return -EIO; |
| 339 | |
| 340 | return cnx_attr->show(cnx, buf); |
| 341 | } |
| 342 | |
| 343 | #define CUSTOM_CNX_ATTR(_name, _format, _expression) \ |
| 344 | static ssize_t _name##_show(struct veth_lpar_connection *cnx, char *buf)\ |
| 345 | { \ |
| 346 | return sprintf(buf, _format, _expression); \ |
| 347 | } \ |
| 348 | struct veth_cnx_attribute veth_cnx_attr_##_name = __ATTR_RO(_name) |
| 349 | |
| 350 | #define SIMPLE_CNX_ATTR(_name) \ |
| 351 | CUSTOM_CNX_ATTR(_name, "%lu\n", (unsigned long)cnx->_name) |
| 352 | |
| 353 | SIMPLE_CNX_ATTR(outstanding_tx); |
| 354 | SIMPLE_CNX_ATTR(remote_lp); |
| 355 | SIMPLE_CNX_ATTR(num_events); |
| 356 | SIMPLE_CNX_ATTR(src_inst); |
| 357 | SIMPLE_CNX_ATTR(dst_inst); |
| 358 | SIMPLE_CNX_ATTR(num_pending_acks); |
| 359 | SIMPLE_CNX_ATTR(num_ack_events); |
| 360 | CUSTOM_CNX_ATTR(ack_timeout, "%d\n", jiffies_to_msecs(cnx->ack_timeout)); |
| 361 | CUSTOM_CNX_ATTR(reset_timeout, "%d\n", jiffies_to_msecs(cnx->reset_timeout)); |
| 362 | CUSTOM_CNX_ATTR(state, "0x%.4lX\n", cnx->state); |
| 363 | CUSTOM_CNX_ATTR(last_contact, "%d\n", cnx->last_contact ? |
| 364 | jiffies_to_msecs(jiffies - cnx->last_contact) : 0); |
| 365 | |
| 366 | #define GET_CNX_ATTR(_name) (&veth_cnx_attr_##_name.attr) |
| 367 | |
| 368 | static struct attribute *veth_cnx_default_attrs[] = { |
| 369 | GET_CNX_ATTR(outstanding_tx), |
| 370 | GET_CNX_ATTR(remote_lp), |
| 371 | GET_CNX_ATTR(num_events), |
| 372 | GET_CNX_ATTR(reset_timeout), |
| 373 | GET_CNX_ATTR(last_contact), |
| 374 | GET_CNX_ATTR(state), |
| 375 | GET_CNX_ATTR(src_inst), |
| 376 | GET_CNX_ATTR(dst_inst), |
| 377 | GET_CNX_ATTR(num_pending_acks), |
| 378 | GET_CNX_ATTR(num_ack_events), |
| 379 | GET_CNX_ATTR(ack_timeout), |
| 380 | NULL |
| 381 | }; |
| 382 | |
| 383 | static struct sysfs_ops veth_cnx_sysfs_ops = { |
| 384 | .show = veth_cnx_attribute_show |
| 385 | }; |
| 386 | |
| 387 | static struct kobj_type veth_lpar_connection_ktype = { |
| 388 | .release = veth_release_connection, |
| 389 | .sysfs_ops = &veth_cnx_sysfs_ops, |
| 390 | .default_attrs = veth_cnx_default_attrs |
| 391 | }; |
| 392 | |
Michael Ellerman | 07a5c17 | 2005-09-01 11:29:21 +1000 | [diff] [blame] | 393 | struct veth_port_attribute { |
| 394 | struct attribute attr; |
| 395 | ssize_t (*show)(struct veth_port *, char *buf); |
| 396 | ssize_t (*store)(struct veth_port *, const char *buf); |
| 397 | }; |
| 398 | |
| 399 | static ssize_t veth_port_attribute_show(struct kobject *kobj, |
| 400 | struct attribute *attr, char *buf) |
| 401 | { |
| 402 | struct veth_port_attribute *port_attr; |
| 403 | struct veth_port *port; |
| 404 | |
| 405 | port_attr = container_of(attr, struct veth_port_attribute, attr); |
| 406 | port = container_of(kobj, struct veth_port, kobject); |
| 407 | |
| 408 | if (!port_attr->show) |
| 409 | return -EIO; |
| 410 | |
| 411 | return port_attr->show(port, buf); |
| 412 | } |
| 413 | |
| 414 | #define CUSTOM_PORT_ATTR(_name, _format, _expression) \ |
| 415 | static ssize_t _name##_show(struct veth_port *port, char *buf) \ |
| 416 | { \ |
| 417 | return sprintf(buf, _format, _expression); \ |
| 418 | } \ |
| 419 | struct veth_port_attribute veth_port_attr_##_name = __ATTR_RO(_name) |
| 420 | |
| 421 | #define SIMPLE_PORT_ATTR(_name) \ |
| 422 | CUSTOM_PORT_ATTR(_name, "%lu\n", (unsigned long)port->_name) |
| 423 | |
| 424 | SIMPLE_PORT_ATTR(promiscuous); |
| 425 | SIMPLE_PORT_ATTR(num_mcast); |
| 426 | CUSTOM_PORT_ATTR(lpar_map, "0x%X\n", port->lpar_map); |
| 427 | CUSTOM_PORT_ATTR(stopped_map, "0x%X\n", port->stopped_map); |
| 428 | CUSTOM_PORT_ATTR(mac_addr, "0x%lX\n", port->mac_addr); |
| 429 | |
| 430 | #define GET_PORT_ATTR(_name) (&veth_port_attr_##_name.attr) |
| 431 | static struct attribute *veth_port_default_attrs[] = { |
| 432 | GET_PORT_ATTR(mac_addr), |
| 433 | GET_PORT_ATTR(lpar_map), |
| 434 | GET_PORT_ATTR(stopped_map), |
| 435 | GET_PORT_ATTR(promiscuous), |
| 436 | GET_PORT_ATTR(num_mcast), |
| 437 | NULL |
| 438 | }; |
| 439 | |
| 440 | static struct sysfs_ops veth_port_sysfs_ops = { |
| 441 | .show = veth_port_attribute_show |
| 442 | }; |
| 443 | |
| 444 | static struct kobj_type veth_port_ktype = { |
| 445 | .sysfs_ops = &veth_port_sysfs_ops, |
| 446 | .default_attrs = veth_port_default_attrs |
| 447 | }; |
| 448 | |
Michael Ellerman | 76812d812 | 2005-09-01 11:29:20 +1000 | [diff] [blame] | 449 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | * LPAR connection code |
| 451 | */ |
| 452 | |
| 453 | static inline void veth_kick_statemachine(struct veth_lpar_connection *cnx) |
| 454 | { |
| 455 | schedule_work(&cnx->statemachine_wq); |
| 456 | } |
| 457 | |
| 458 | static void veth_take_cap(struct veth_lpar_connection *cnx, |
| 459 | struct VethLpEvent *event) |
| 460 | { |
| 461 | unsigned long flags; |
| 462 | |
| 463 | spin_lock_irqsave(&cnx->lock, flags); |
| 464 | /* Receiving caps may mean the other end has just come up, so |
| 465 | * we need to reload the instance ID of the far end */ |
| 466 | cnx->dst_inst = |
| 467 | HvCallEvent_getTargetLpInstanceId(cnx->remote_lp, |
| 468 | HvLpEvent_Type_VirtualLan); |
| 469 | |
| 470 | if (cnx->state & VETH_STATE_GOTCAPS) { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 471 | veth_error("Received a second capabilities from LPAR %d.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | cnx->remote_lp); |
| 473 | event->base_event.xRc = HvLpEvent_Rc_BufferNotAvailable; |
| 474 | HvCallEvent_ackLpEvent((struct HvLpEvent *) event); |
| 475 | } else { |
| 476 | memcpy(&cnx->cap_event, event, sizeof(cnx->cap_event)); |
| 477 | cnx->state |= VETH_STATE_GOTCAPS; |
| 478 | veth_kick_statemachine(cnx); |
| 479 | } |
| 480 | spin_unlock_irqrestore(&cnx->lock, flags); |
| 481 | } |
| 482 | |
| 483 | static void veth_take_cap_ack(struct veth_lpar_connection *cnx, |
| 484 | struct VethLpEvent *event) |
| 485 | { |
| 486 | unsigned long flags; |
| 487 | |
| 488 | spin_lock_irqsave(&cnx->lock, flags); |
| 489 | if (cnx->state & VETH_STATE_GOTCAPACK) { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 490 | veth_error("Received a second capabilities ack from LPAR %d.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | cnx->remote_lp); |
| 492 | } else { |
| 493 | memcpy(&cnx->cap_ack_event, event, |
| 494 | sizeof(&cnx->cap_ack_event)); |
| 495 | cnx->state |= VETH_STATE_GOTCAPACK; |
| 496 | veth_kick_statemachine(cnx); |
| 497 | } |
| 498 | spin_unlock_irqrestore(&cnx->lock, flags); |
| 499 | } |
| 500 | |
| 501 | static void veth_take_monitor_ack(struct veth_lpar_connection *cnx, |
| 502 | struct VethLpEvent *event) |
| 503 | { |
| 504 | unsigned long flags; |
| 505 | |
| 506 | spin_lock_irqsave(&cnx->lock, flags); |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 507 | veth_debug("cnx %d: lost connection.\n", cnx->remote_lp); |
Michael Ellerman | 58c5900 | 2005-09-01 11:29:00 +1000 | [diff] [blame] | 508 | |
| 509 | /* Avoid kicking the statemachine once we're shutdown. |
| 510 | * It's unnecessary and it could break veth_stop_connection(). */ |
| 511 | |
| 512 | if (! (cnx->state & VETH_STATE_SHUTDOWN)) { |
| 513 | cnx->state |= VETH_STATE_RESET; |
| 514 | veth_kick_statemachine(cnx); |
| 515 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | spin_unlock_irqrestore(&cnx->lock, flags); |
| 517 | } |
| 518 | |
| 519 | static void veth_handle_ack(struct VethLpEvent *event) |
| 520 | { |
| 521 | HvLpIndex rlp = event->base_event.xTargetLp; |
| 522 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; |
| 523 | |
| 524 | BUG_ON(! cnx); |
| 525 | |
| 526 | switch (event->base_event.xSubtype) { |
| 527 | case VethEventTypeCap: |
| 528 | veth_take_cap_ack(cnx, event); |
| 529 | break; |
| 530 | case VethEventTypeMonitor: |
| 531 | veth_take_monitor_ack(cnx, event); |
| 532 | break; |
| 533 | default: |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 534 | veth_error("Unknown ack type %d from LPAR %d.\n", |
| 535 | event->base_event.xSubtype, rlp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | }; |
| 537 | } |
| 538 | |
| 539 | static void veth_handle_int(struct VethLpEvent *event) |
| 540 | { |
| 541 | HvLpIndex rlp = event->base_event.xSourceLp; |
| 542 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; |
| 543 | unsigned long flags; |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 544 | int i, acked = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
| 546 | BUG_ON(! cnx); |
| 547 | |
| 548 | switch (event->base_event.xSubtype) { |
| 549 | case VethEventTypeCap: |
| 550 | veth_take_cap(cnx, event); |
| 551 | break; |
| 552 | case VethEventTypeMonitor: |
| 553 | /* do nothing... this'll hang out here til we're dead, |
| 554 | * and the hypervisor will return it for us. */ |
| 555 | break; |
| 556 | case VethEventTypeFramesAck: |
| 557 | spin_lock_irqsave(&cnx->lock, flags); |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 558 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | for (i = 0; i < VETH_MAX_ACKS_PER_MSG; ++i) { |
| 560 | u16 msgnum = event->u.frames_ack_data.token[i]; |
| 561 | |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 562 | if (msgnum < VETH_NUMBUFFERS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | veth_recycle_msg(cnx, cnx->msgs + msgnum); |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 564 | cnx->outstanding_tx--; |
| 565 | acked++; |
| 566 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | } |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 568 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 569 | if (acked > 0) { |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 570 | cnx->last_contact = jiffies; |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 571 | veth_wake_queues(cnx); |
| 572 | } |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | spin_unlock_irqrestore(&cnx->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | break; |
| 576 | case VethEventTypeFrames: |
| 577 | veth_receive(cnx, event); |
| 578 | break; |
| 579 | default: |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 580 | veth_error("Unknown interrupt type %d from LPAR %d.\n", |
| 581 | event->base_event.xSubtype, rlp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | }; |
| 583 | } |
| 584 | |
| 585 | static void veth_handle_event(struct HvLpEvent *event, struct pt_regs *regs) |
| 586 | { |
| 587 | struct VethLpEvent *veth_event = (struct VethLpEvent *)event; |
| 588 | |
| 589 | if (event->xFlags.xFunction == HvLpEvent_Function_Ack) |
| 590 | veth_handle_ack(veth_event); |
| 591 | else if (event->xFlags.xFunction == HvLpEvent_Function_Int) |
| 592 | veth_handle_int(veth_event); |
| 593 | } |
| 594 | |
| 595 | static int veth_process_caps(struct veth_lpar_connection *cnx) |
| 596 | { |
| 597 | struct VethCapData *remote_caps = &cnx->remote_caps; |
| 598 | int num_acks_needed; |
| 599 | |
| 600 | /* Convert timer to jiffies */ |
| 601 | cnx->ack_timeout = remote_caps->ack_timeout * HZ / 1000000; |
| 602 | |
| 603 | if ( (remote_caps->num_buffers == 0) |
| 604 | || (remote_caps->ack_threshold > VETH_MAX_ACKS_PER_MSG) |
| 605 | || (remote_caps->ack_threshold == 0) |
| 606 | || (cnx->ack_timeout == 0) ) { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 607 | veth_error("Received incompatible capabilities from LPAR %d.\n", |
| 608 | cnx->remote_lp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | return HvLpEvent_Rc_InvalidSubtypeData; |
| 610 | } |
| 611 | |
| 612 | num_acks_needed = (remote_caps->num_buffers |
| 613 | / remote_caps->ack_threshold) + 1; |
| 614 | |
| 615 | /* FIXME: locking on num_ack_events? */ |
| 616 | if (cnx->num_ack_events < num_acks_needed) { |
| 617 | int num; |
| 618 | |
| 619 | num = veth_allocate_events(cnx->remote_lp, |
| 620 | num_acks_needed-cnx->num_ack_events); |
| 621 | if (num > 0) |
| 622 | cnx->num_ack_events += num; |
| 623 | |
| 624 | if (cnx->num_ack_events < num_acks_needed) { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 625 | veth_error("Couldn't allocate enough ack events " |
| 626 | "for LPAR %d.\n", cnx->remote_lp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | |
| 628 | return HvLpEvent_Rc_BufferNotAvailable; |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | |
| 633 | return HvLpEvent_Rc_Good; |
| 634 | } |
| 635 | |
| 636 | /* FIXME: The gotos here are a bit dubious */ |
| 637 | static void veth_statemachine(void *p) |
| 638 | { |
| 639 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)p; |
| 640 | int rlp = cnx->remote_lp; |
| 641 | int rc; |
| 642 | |
| 643 | spin_lock_irq(&cnx->lock); |
| 644 | |
| 645 | restart: |
| 646 | if (cnx->state & VETH_STATE_RESET) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | if (cnx->state & VETH_STATE_OPEN) |
| 648 | HvCallEvent_closeLpEventPath(cnx->remote_lp, |
| 649 | HvLpEvent_Type_VirtualLan); |
| 650 | |
Michael Ellerman | abfda47 | 2005-09-01 11:28:59 +1000 | [diff] [blame] | 651 | /* |
| 652 | * Reset ack data. This prevents the ack_timer actually |
| 653 | * doing anything, even if it runs one more time when |
| 654 | * we drop the lock below. |
| 655 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks)); |
| 657 | cnx->num_pending_acks = 0; |
| 658 | |
| 659 | cnx->state &= ~(VETH_STATE_RESET | VETH_STATE_SENTMON |
| 660 | | VETH_STATE_OPEN | VETH_STATE_SENTCAPS |
| 661 | | VETH_STATE_GOTCAPACK | VETH_STATE_GOTCAPS |
| 662 | | VETH_STATE_SENTCAPACK | VETH_STATE_READY); |
| 663 | |
| 664 | /* Clean up any leftover messages */ |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 665 | if (cnx->msgs) { |
| 666 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | for (i = 0; i < VETH_NUMBUFFERS; ++i) |
| 668 | veth_recycle_msg(cnx, cnx->msgs + i); |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 669 | } |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 670 | |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 671 | cnx->outstanding_tx = 0; |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 672 | veth_wake_queues(cnx); |
Michael Ellerman | abfda47 | 2005-09-01 11:28:59 +1000 | [diff] [blame] | 673 | |
| 674 | /* Drop the lock so we can do stuff that might sleep or |
| 675 | * take other locks. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | spin_unlock_irq(&cnx->lock); |
Michael Ellerman | abfda47 | 2005-09-01 11:28:59 +1000 | [diff] [blame] | 677 | |
| 678 | del_timer_sync(&cnx->ack_timer); |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 679 | del_timer_sync(&cnx->reset_timer); |
| 680 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | spin_lock_irq(&cnx->lock); |
Michael Ellerman | abfda47 | 2005-09-01 11:28:59 +1000 | [diff] [blame] | 682 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | if (cnx->state & VETH_STATE_RESET) |
| 684 | goto restart; |
Michael Ellerman | 58c5900 | 2005-09-01 11:29:00 +1000 | [diff] [blame] | 685 | |
| 686 | /* Hack, wait for the other end to reset itself. */ |
| 687 | if (! (cnx->state & VETH_STATE_SHUTDOWN)) { |
| 688 | schedule_delayed_work(&cnx->statemachine_wq, 5 * HZ); |
| 689 | goto out; |
| 690 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | } |
| 692 | |
| 693 | if (cnx->state & VETH_STATE_SHUTDOWN) |
| 694 | /* It's all over, do nothing */ |
| 695 | goto out; |
| 696 | |
| 697 | if ( !(cnx->state & VETH_STATE_OPEN) ) { |
| 698 | if (! cnx->msgs || (cnx->num_events < (2 + VETH_NUMBUFFERS)) ) |
| 699 | goto cant_cope; |
| 700 | |
| 701 | HvCallEvent_openLpEventPath(rlp, HvLpEvent_Type_VirtualLan); |
| 702 | cnx->src_inst = |
| 703 | HvCallEvent_getSourceLpInstanceId(rlp, |
| 704 | HvLpEvent_Type_VirtualLan); |
| 705 | cnx->dst_inst = |
| 706 | HvCallEvent_getTargetLpInstanceId(rlp, |
| 707 | HvLpEvent_Type_VirtualLan); |
| 708 | cnx->state |= VETH_STATE_OPEN; |
| 709 | } |
| 710 | |
| 711 | if ( (cnx->state & VETH_STATE_OPEN) |
| 712 | && !(cnx->state & VETH_STATE_SENTMON) ) { |
| 713 | rc = veth_signalevent(cnx, VethEventTypeMonitor, |
| 714 | HvLpEvent_AckInd_DoAck, |
| 715 | HvLpEvent_AckType_DeferredAck, |
| 716 | 0, 0, 0, 0, 0, 0); |
| 717 | |
| 718 | if (rc == HvLpEvent_Rc_Good) { |
| 719 | cnx->state |= VETH_STATE_SENTMON; |
| 720 | } else { |
| 721 | if ( (rc != HvLpEvent_Rc_PartitionDead) |
| 722 | && (rc != HvLpEvent_Rc_PathClosed) ) |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 723 | veth_error("Error sending monitor to LPAR %d, " |
| 724 | "rc = %d\n", rlp, rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | |
| 726 | /* Oh well, hope we get a cap from the other |
| 727 | * end and do better when that kicks us */ |
| 728 | goto out; |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | if ( (cnx->state & VETH_STATE_OPEN) |
| 733 | && !(cnx->state & VETH_STATE_SENTCAPS)) { |
| 734 | u64 *rawcap = (u64 *)&cnx->local_caps; |
| 735 | |
| 736 | rc = veth_signalevent(cnx, VethEventTypeCap, |
| 737 | HvLpEvent_AckInd_DoAck, |
| 738 | HvLpEvent_AckType_ImmediateAck, |
| 739 | 0, rawcap[0], rawcap[1], rawcap[2], |
| 740 | rawcap[3], rawcap[4]); |
| 741 | |
| 742 | if (rc == HvLpEvent_Rc_Good) { |
| 743 | cnx->state |= VETH_STATE_SENTCAPS; |
| 744 | } else { |
| 745 | if ( (rc != HvLpEvent_Rc_PartitionDead) |
| 746 | && (rc != HvLpEvent_Rc_PathClosed) ) |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 747 | veth_error("Error sending caps to LPAR %d, " |
| 748 | "rc = %d\n", rlp, rc); |
| 749 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | /* Oh well, hope we get a cap from the other |
| 751 | * end and do better when that kicks us */ |
| 752 | goto out; |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | if ((cnx->state & VETH_STATE_GOTCAPS) |
| 757 | && !(cnx->state & VETH_STATE_SENTCAPACK)) { |
| 758 | struct VethCapData *remote_caps = &cnx->remote_caps; |
| 759 | |
| 760 | memcpy(remote_caps, &cnx->cap_event.u.caps_data, |
| 761 | sizeof(*remote_caps)); |
| 762 | |
| 763 | spin_unlock_irq(&cnx->lock); |
| 764 | rc = veth_process_caps(cnx); |
| 765 | spin_lock_irq(&cnx->lock); |
| 766 | |
| 767 | /* We dropped the lock, so recheck for anything which |
| 768 | * might mess us up */ |
| 769 | if (cnx->state & (VETH_STATE_RESET|VETH_STATE_SHUTDOWN)) |
| 770 | goto restart; |
| 771 | |
| 772 | cnx->cap_event.base_event.xRc = rc; |
| 773 | HvCallEvent_ackLpEvent((struct HvLpEvent *)&cnx->cap_event); |
| 774 | if (rc == HvLpEvent_Rc_Good) |
| 775 | cnx->state |= VETH_STATE_SENTCAPACK; |
| 776 | else |
| 777 | goto cant_cope; |
| 778 | } |
| 779 | |
| 780 | if ((cnx->state & VETH_STATE_GOTCAPACK) |
| 781 | && (cnx->state & VETH_STATE_GOTCAPS) |
| 782 | && !(cnx->state & VETH_STATE_READY)) { |
| 783 | if (cnx->cap_ack_event.base_event.xRc == HvLpEvent_Rc_Good) { |
| 784 | /* Start the ACK timer */ |
| 785 | cnx->ack_timer.expires = jiffies + cnx->ack_timeout; |
| 786 | add_timer(&cnx->ack_timer); |
| 787 | cnx->state |= VETH_STATE_READY; |
| 788 | } else { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 789 | veth_error("Caps rejected by LPAR %d, rc = %d\n", |
| 790 | rlp, cnx->cap_ack_event.base_event.xRc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | goto cant_cope; |
| 792 | } |
| 793 | } |
| 794 | |
| 795 | out: |
| 796 | spin_unlock_irq(&cnx->lock); |
| 797 | return; |
| 798 | |
| 799 | cant_cope: |
| 800 | /* FIXME: we get here if something happens we really can't |
| 801 | * cope with. The link will never work once we get here, and |
| 802 | * all we can do is not lock the rest of the system up */ |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 803 | veth_error("Unrecoverable error on connection to LPAR %d, shutting down" |
| 804 | " (state = 0x%04lx)\n", rlp, cnx->state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | cnx->state |= VETH_STATE_SHUTDOWN; |
| 806 | spin_unlock_irq(&cnx->lock); |
| 807 | } |
| 808 | |
| 809 | static int veth_init_connection(u8 rlp) |
| 810 | { |
| 811 | struct veth_lpar_connection *cnx; |
| 812 | struct veth_msg *msgs; |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 813 | int i, rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | |
| 815 | if ( (rlp == this_lp) |
| 816 | || ! HvLpConfig_doLpsCommunicateOnVirtualLan(this_lp, rlp) ) |
| 817 | return 0; |
| 818 | |
| 819 | cnx = kmalloc(sizeof(*cnx), GFP_KERNEL); |
| 820 | if (! cnx) |
| 821 | return -ENOMEM; |
| 822 | memset(cnx, 0, sizeof(*cnx)); |
| 823 | |
| 824 | cnx->remote_lp = rlp; |
| 825 | spin_lock_init(&cnx->lock); |
| 826 | INIT_WORK(&cnx->statemachine_wq, veth_statemachine, cnx); |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 827 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | init_timer(&cnx->ack_timer); |
| 829 | cnx->ack_timer.function = veth_timed_ack; |
| 830 | cnx->ack_timer.data = (unsigned long) cnx; |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 831 | |
| 832 | init_timer(&cnx->reset_timer); |
| 833 | cnx->reset_timer.function = veth_timed_reset; |
| 834 | cnx->reset_timer.data = (unsigned long) cnx; |
| 835 | cnx->reset_timeout = 5 * HZ * (VETH_ACKTIMEOUT / 1000000); |
| 836 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks)); |
| 838 | |
| 839 | veth_cnx[rlp] = cnx; |
| 840 | |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 841 | /* This gets us 1 reference, which is held on behalf of the driver |
| 842 | * infrastructure. It's released at module unload. */ |
| 843 | kobject_init(&cnx->kobject); |
| 844 | cnx->kobject.ktype = &veth_lpar_connection_ktype; |
| 845 | rc = kobject_set_name(&cnx->kobject, "cnx%.2d", rlp); |
| 846 | if (rc != 0) |
| 847 | return rc; |
| 848 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | msgs = kmalloc(VETH_NUMBUFFERS * sizeof(struct veth_msg), GFP_KERNEL); |
| 850 | if (! msgs) { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 851 | veth_error("Can't allocate buffers for LPAR %d.\n", rlp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | return -ENOMEM; |
| 853 | } |
| 854 | |
| 855 | cnx->msgs = msgs; |
| 856 | memset(msgs, 0, VETH_NUMBUFFERS * sizeof(struct veth_msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | |
| 858 | for (i = 0; i < VETH_NUMBUFFERS; i++) { |
| 859 | msgs[i].token = i; |
| 860 | veth_stack_push(cnx, msgs + i); |
| 861 | } |
| 862 | |
| 863 | cnx->num_events = veth_allocate_events(rlp, 2 + VETH_NUMBUFFERS); |
| 864 | |
| 865 | if (cnx->num_events < (2 + VETH_NUMBUFFERS)) { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 866 | veth_error("Can't allocate enough events for LPAR %d.\n", rlp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | return -ENOMEM; |
| 868 | } |
| 869 | |
| 870 | cnx->local_caps.num_buffers = VETH_NUMBUFFERS; |
| 871 | cnx->local_caps.ack_threshold = ACK_THRESHOLD; |
| 872 | cnx->local_caps.ack_timeout = VETH_ACKTIMEOUT; |
| 873 | |
| 874 | return 0; |
| 875 | } |
| 876 | |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 877 | static void veth_stop_connection(struct veth_lpar_connection *cnx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | { |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 879 | if (!cnx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | return; |
| 881 | |
| 882 | spin_lock_irq(&cnx->lock); |
| 883 | cnx->state |= VETH_STATE_RESET | VETH_STATE_SHUTDOWN; |
| 884 | veth_kick_statemachine(cnx); |
| 885 | spin_unlock_irq(&cnx->lock); |
| 886 | |
Michael Ellerman | 58c5900 | 2005-09-01 11:29:00 +1000 | [diff] [blame] | 887 | /* There's a slim chance the reset code has just queued the |
| 888 | * statemachine to run in five seconds. If so we need to cancel |
| 889 | * that and requeue the work to run now. */ |
| 890 | if (cancel_delayed_work(&cnx->statemachine_wq)) { |
| 891 | spin_lock_irq(&cnx->lock); |
| 892 | veth_kick_statemachine(cnx); |
| 893 | spin_unlock_irq(&cnx->lock); |
| 894 | } |
| 895 | |
Michael Ellerman | abfda47 | 2005-09-01 11:28:59 +1000 | [diff] [blame] | 896 | /* Wait for the state machine to run. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | flush_scheduled_work(); |
Michael Ellerman | ec60bee | 2005-09-01 11:29:08 +1000 | [diff] [blame] | 898 | } |
| 899 | |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 900 | static void veth_destroy_connection(struct veth_lpar_connection *cnx) |
Michael Ellerman | ec60bee | 2005-09-01 11:29:08 +1000 | [diff] [blame] | 901 | { |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 902 | if (!cnx) |
Michael Ellerman | ec60bee | 2005-09-01 11:29:08 +1000 | [diff] [blame] | 903 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | if (cnx->num_events > 0) |
| 906 | mf_deallocate_lp_events(cnx->remote_lp, |
| 907 | HvLpEvent_Type_VirtualLan, |
| 908 | cnx->num_events, |
| 909 | NULL, NULL); |
| 910 | if (cnx->num_ack_events > 0) |
| 911 | mf_deallocate_lp_events(cnx->remote_lp, |
| 912 | HvLpEvent_Type_VirtualLan, |
| 913 | cnx->num_ack_events, |
| 914 | NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
| 916 | kfree(cnx->msgs); |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 917 | veth_cnx[cnx->remote_lp] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | kfree(cnx); |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 919 | } |
| 920 | |
| 921 | static void veth_release_connection(struct kobject *kobj) |
| 922 | { |
| 923 | struct veth_lpar_connection *cnx; |
| 924 | cnx = container_of(kobj, struct veth_lpar_connection, kobject); |
| 925 | veth_stop_connection(cnx); |
| 926 | veth_destroy_connection(cnx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | } |
| 928 | |
| 929 | /* |
| 930 | * net_device code |
| 931 | */ |
| 932 | |
| 933 | static int veth_open(struct net_device *dev) |
| 934 | { |
| 935 | struct veth_port *port = (struct veth_port *) dev->priv; |
| 936 | |
| 937 | memset(&port->stats, 0, sizeof (port->stats)); |
| 938 | netif_start_queue(dev); |
| 939 | return 0; |
| 940 | } |
| 941 | |
| 942 | static int veth_close(struct net_device *dev) |
| 943 | { |
| 944 | netif_stop_queue(dev); |
| 945 | return 0; |
| 946 | } |
| 947 | |
| 948 | static struct net_device_stats *veth_get_stats(struct net_device *dev) |
| 949 | { |
| 950 | struct veth_port *port = (struct veth_port *) dev->priv; |
| 951 | |
| 952 | return &port->stats; |
| 953 | } |
| 954 | |
| 955 | static int veth_change_mtu(struct net_device *dev, int new_mtu) |
| 956 | { |
| 957 | if ((new_mtu < 68) || (new_mtu > VETH_MAX_MTU)) |
| 958 | return -EINVAL; |
| 959 | dev->mtu = new_mtu; |
| 960 | return 0; |
| 961 | } |
| 962 | |
| 963 | static void veth_set_multicast_list(struct net_device *dev) |
| 964 | { |
| 965 | struct veth_port *port = (struct veth_port *) dev->priv; |
| 966 | unsigned long flags; |
| 967 | |
| 968 | write_lock_irqsave(&port->mcast_gate, flags); |
| 969 | |
Michael Ellerman | 2a5391a | 2005-09-01 11:29:02 +1000 | [diff] [blame] | 970 | if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || |
| 971 | (dev->mc_count > VETH_MAX_MCAST)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | port->promiscuous = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | } else { |
| 974 | struct dev_mc_list *dmi = dev->mc_list; |
| 975 | int i; |
| 976 | |
Michael Ellerman | 2a5391a | 2005-09-01 11:29:02 +1000 | [diff] [blame] | 977 | port->promiscuous = 0; |
| 978 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | /* Update table */ |
| 980 | port->num_mcast = 0; |
| 981 | |
| 982 | for (i = 0; i < dev->mc_count; i++) { |
| 983 | u8 *addr = dmi->dmi_addr; |
| 984 | u64 xaddr = 0; |
| 985 | |
| 986 | if (addr[0] & 0x01) {/* multicast address? */ |
| 987 | memcpy(&xaddr, addr, ETH_ALEN); |
| 988 | port->mcast_addr[port->num_mcast] = xaddr; |
| 989 | port->num_mcast++; |
| 990 | } |
| 991 | dmi = dmi->next; |
| 992 | } |
| 993 | } |
| 994 | |
| 995 | write_unlock_irqrestore(&port->mcast_gate, flags); |
| 996 | } |
| 997 | |
| 998 | static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
| 999 | { |
| 1000 | strncpy(info->driver, "veth", sizeof(info->driver) - 1); |
| 1001 | info->driver[sizeof(info->driver) - 1] = '\0'; |
| 1002 | strncpy(info->version, "1.0", sizeof(info->version) - 1); |
| 1003 | } |
| 1004 | |
| 1005 | static int veth_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) |
| 1006 | { |
| 1007 | ecmd->supported = (SUPPORTED_1000baseT_Full |
| 1008 | | SUPPORTED_Autoneg | SUPPORTED_FIBRE); |
| 1009 | ecmd->advertising = (SUPPORTED_1000baseT_Full |
| 1010 | | SUPPORTED_Autoneg | SUPPORTED_FIBRE); |
| 1011 | ecmd->port = PORT_FIBRE; |
| 1012 | ecmd->transceiver = XCVR_INTERNAL; |
| 1013 | ecmd->phy_address = 0; |
| 1014 | ecmd->speed = SPEED_1000; |
| 1015 | ecmd->duplex = DUPLEX_FULL; |
| 1016 | ecmd->autoneg = AUTONEG_ENABLE; |
| 1017 | ecmd->maxtxpkt = 120; |
| 1018 | ecmd->maxrxpkt = 120; |
| 1019 | return 0; |
| 1020 | } |
| 1021 | |
| 1022 | static u32 veth_get_link(struct net_device *dev) |
| 1023 | { |
| 1024 | return 1; |
| 1025 | } |
| 1026 | |
| 1027 | static struct ethtool_ops ops = { |
| 1028 | .get_drvinfo = veth_get_drvinfo, |
| 1029 | .get_settings = veth_get_settings, |
| 1030 | .get_link = veth_get_link, |
| 1031 | }; |
| 1032 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | static struct net_device * __init veth_probe_one(int vlan, struct device *vdev) |
| 1034 | { |
| 1035 | struct net_device *dev; |
| 1036 | struct veth_port *port; |
| 1037 | int i, rc; |
| 1038 | |
| 1039 | dev = alloc_etherdev(sizeof (struct veth_port)); |
| 1040 | if (! dev) { |
| 1041 | veth_error("Unable to allocate net_device structure!\n"); |
| 1042 | return NULL; |
| 1043 | } |
| 1044 | |
| 1045 | port = (struct veth_port *) dev->priv; |
| 1046 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 1047 | spin_lock_init(&port->queue_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | rwlock_init(&port->mcast_gate); |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 1049 | port->stopped_map = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | |
| 1051 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { |
| 1052 | HvLpVirtualLanIndexMap map; |
| 1053 | |
| 1054 | if (i == this_lp) |
| 1055 | continue; |
| 1056 | map = HvLpConfig_getVirtualLanIndexMapForLp(i); |
| 1057 | if (map & (0x8000 >> vlan)) |
| 1058 | port->lpar_map |= (1 << i); |
| 1059 | } |
| 1060 | port->dev = vdev; |
| 1061 | |
| 1062 | dev->dev_addr[0] = 0x02; |
| 1063 | dev->dev_addr[1] = 0x01; |
| 1064 | dev->dev_addr[2] = 0xff; |
| 1065 | dev->dev_addr[3] = vlan; |
| 1066 | dev->dev_addr[4] = 0xff; |
| 1067 | dev->dev_addr[5] = this_lp; |
| 1068 | |
| 1069 | dev->mtu = VETH_MAX_MTU; |
| 1070 | |
| 1071 | memcpy(&port->mac_addr, dev->dev_addr, 6); |
| 1072 | |
| 1073 | dev->open = veth_open; |
| 1074 | dev->hard_start_xmit = veth_start_xmit; |
| 1075 | dev->stop = veth_close; |
| 1076 | dev->get_stats = veth_get_stats; |
| 1077 | dev->change_mtu = veth_change_mtu; |
| 1078 | dev->set_mac_address = NULL; |
| 1079 | dev->set_multicast_list = veth_set_multicast_list; |
| 1080 | SET_ETHTOOL_OPS(dev, &ops); |
| 1081 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | SET_NETDEV_DEV(dev, vdev); |
| 1083 | |
| 1084 | rc = register_netdev(dev); |
| 1085 | if (rc != 0) { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 1086 | veth_error("Failed registering net device for vlan%d.\n", vlan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | free_netdev(dev); |
| 1088 | return NULL; |
| 1089 | } |
| 1090 | |
Michael Ellerman | 07a5c17 | 2005-09-01 11:29:21 +1000 | [diff] [blame] | 1091 | kobject_init(&port->kobject); |
| 1092 | port->kobject.parent = &dev->class_dev.kobj; |
| 1093 | port->kobject.ktype = &veth_port_ktype; |
| 1094 | kobject_set_name(&port->kobject, "veth_port"); |
| 1095 | if (0 != kobject_add(&port->kobject)) |
| 1096 | veth_error("Failed adding port for %s to sysfs.\n", dev->name); |
| 1097 | |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 1098 | veth_info("%s attached to iSeries vlan %d (LPAR map = 0x%.4X)\n", |
| 1099 | dev->name, vlan, port->lpar_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
| 1101 | return dev; |
| 1102 | } |
| 1103 | |
| 1104 | /* |
| 1105 | * Tx path |
| 1106 | */ |
| 1107 | |
| 1108 | static int veth_transmit_to_one(struct sk_buff *skb, HvLpIndex rlp, |
| 1109 | struct net_device *dev) |
| 1110 | { |
| 1111 | struct veth_lpar_connection *cnx = veth_cnx[rlp]; |
| 1112 | struct veth_port *port = (struct veth_port *) dev->priv; |
| 1113 | HvLpEvent_Rc rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | struct veth_msg *msg = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | unsigned long flags; |
| 1116 | |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1117 | if (! cnx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | |
| 1120 | spin_lock_irqsave(&cnx->lock, flags); |
| 1121 | |
Michael Ellerman | f27eff1 | 2005-05-12 17:47:27 +1000 | [diff] [blame] | 1122 | if (! (cnx->state & VETH_STATE_READY)) |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1123 | goto no_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1125 | if ((skb->len - ETH_HLEN) > VETH_MAX_MTU) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | goto drop; |
| 1127 | |
| 1128 | msg = veth_stack_pop(cnx); |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1129 | if (! msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | |
Michael Ellerman | b08bd5c | 2005-09-01 11:29:06 +1000 | [diff] [blame] | 1132 | msg->in_use = 1; |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1133 | msg->skb = skb_get(skb); |
Michael Ellerman | b08bd5c | 2005-09-01 11:29:06 +1000 | [diff] [blame] | 1134 | |
Michael Ellerman | cbf9074 | 2005-09-01 11:29:07 +1000 | [diff] [blame] | 1135 | msg->data.addr[0] = dma_map_single(port->dev, skb->data, |
| 1136 | skb->len, DMA_TO_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | |
Michael Ellerman | cbf9074 | 2005-09-01 11:29:07 +1000 | [diff] [blame] | 1138 | if (dma_mapping_error(msg->data.addr[0])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | goto recycle_and_drop; |
| 1140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | msg->dev = port->dev; |
Michael Ellerman | cbf9074 | 2005-09-01 11:29:07 +1000 | [diff] [blame] | 1142 | msg->data.len[0] = skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | msg->data.eofmask = 1 << VETH_EOF_SHIFT; |
Michael Ellerman | cbf9074 | 2005-09-01 11:29:07 +1000 | [diff] [blame] | 1144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | rc = veth_signaldata(cnx, VethEventTypeFrames, msg->token, &msg->data); |
| 1146 | |
| 1147 | if (rc != HvLpEvent_Rc_Good) |
| 1148 | goto recycle_and_drop; |
| 1149 | |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 1150 | /* If the timer's not already running, start it now. */ |
| 1151 | if (0 == cnx->outstanding_tx) |
| 1152 | mod_timer(&cnx->reset_timer, jiffies + cnx->reset_timeout); |
| 1153 | |
| 1154 | cnx->last_contact = jiffies; |
| 1155 | cnx->outstanding_tx++; |
| 1156 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 1157 | if (veth_stack_is_empty(cnx)) |
| 1158 | veth_stop_queues(cnx); |
| 1159 | |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1160 | no_error: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | spin_unlock_irqrestore(&cnx->lock, flags); |
| 1162 | return 0; |
| 1163 | |
| 1164 | recycle_and_drop: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | veth_recycle_msg(cnx, msg); |
| 1166 | drop: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | spin_unlock_irqrestore(&cnx->lock, flags); |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1168 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | } |
| 1170 | |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1171 | static void veth_transmit_to_many(struct sk_buff *skb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | HvLpIndexMap lpmask, |
| 1173 | struct net_device *dev) |
| 1174 | { |
| 1175 | struct veth_port *port = (struct veth_port *) dev->priv; |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1176 | int i, success, error; |
| 1177 | |
| 1178 | success = error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | |
| 1180 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { |
| 1181 | if ((lpmask & (1 << i)) == 0) |
| 1182 | continue; |
| 1183 | |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1184 | if (veth_transmit_to_one(skb, i, dev)) |
| 1185 | error = 1; |
| 1186 | else |
| 1187 | success = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | } |
| 1189 | |
Michael Ellerman | db5e871 | 2005-09-01 11:29:19 +1000 | [diff] [blame] | 1190 | if (error) |
| 1191 | port->stats.tx_errors++; |
| 1192 | |
| 1193 | if (success) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | port->stats.tx_packets++; |
| 1195 | port->stats.tx_bytes += skb->len; |
| 1196 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | } |
| 1198 | |
| 1199 | static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 1200 | { |
| 1201 | unsigned char *frame = skb->data; |
| 1202 | struct veth_port *port = (struct veth_port *) dev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | HvLpIndexMap lpmask; |
| 1204 | |
| 1205 | if (! (frame[0] & 0x01)) { |
| 1206 | /* unicast packet */ |
| 1207 | HvLpIndex rlp = frame[5]; |
| 1208 | |
| 1209 | if ( ! ((1 << rlp) & port->lpar_map) ) { |
| 1210 | dev_kfree_skb(skb); |
| 1211 | return 0; |
| 1212 | } |
| 1213 | |
| 1214 | lpmask = 1 << rlp; |
| 1215 | } else { |
| 1216 | lpmask = port->lpar_map; |
| 1217 | } |
| 1218 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 1219 | veth_transmit_to_many(skb, lpmask, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 1221 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
| 1223 | return 0; |
| 1224 | } |
| 1225 | |
Michael Ellerman | b08bd5c | 2005-09-01 11:29:06 +1000 | [diff] [blame] | 1226 | /* You must hold the connection's lock when you call this function. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | static void veth_recycle_msg(struct veth_lpar_connection *cnx, |
| 1228 | struct veth_msg *msg) |
| 1229 | { |
| 1230 | u32 dma_address, dma_length; |
| 1231 | |
Michael Ellerman | b08bd5c | 2005-09-01 11:29:06 +1000 | [diff] [blame] | 1232 | if (msg->in_use) { |
| 1233 | msg->in_use = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | dma_address = msg->data.addr[0]; |
| 1235 | dma_length = msg->data.len[0]; |
| 1236 | |
Michael Ellerman | cbf9074 | 2005-09-01 11:29:07 +1000 | [diff] [blame] | 1237 | if (!dma_mapping_error(dma_address)) |
| 1238 | dma_unmap_single(msg->dev, dma_address, dma_length, |
| 1239 | DMA_TO_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | |
| 1241 | if (msg->skb) { |
| 1242 | dev_kfree_skb_any(msg->skb); |
| 1243 | msg->skb = NULL; |
| 1244 | } |
| 1245 | |
| 1246 | memset(&msg->data, 0, sizeof(msg->data)); |
| 1247 | veth_stack_push(cnx, msg); |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 1248 | } else if (cnx->state & VETH_STATE_OPEN) { |
| 1249 | veth_error("Non-pending frame (# %d) acked by LPAR %d.\n", |
| 1250 | cnx->remote_lp, msg->token); |
| 1251 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | } |
| 1253 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 1254 | static void veth_wake_queues(struct veth_lpar_connection *cnx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | { |
| 1256 | int i; |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 1257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) { |
| 1259 | struct net_device *dev = veth_dev[i]; |
| 1260 | struct veth_port *port; |
| 1261 | unsigned long flags; |
| 1262 | |
| 1263 | if (! dev) |
| 1264 | continue; |
| 1265 | |
| 1266 | port = (struct veth_port *)dev->priv; |
| 1267 | |
| 1268 | if (! (port->lpar_map & (1<<cnx->remote_lp))) |
| 1269 | continue; |
| 1270 | |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 1271 | spin_lock_irqsave(&port->queue_lock, flags); |
| 1272 | |
| 1273 | port->stopped_map &= ~(1 << cnx->remote_lp); |
| 1274 | |
| 1275 | if (0 == port->stopped_map && netif_queue_stopped(dev)) { |
| 1276 | veth_debug("cnx %d: woke queue for %s.\n", |
| 1277 | cnx->remote_lp, dev->name); |
| 1278 | netif_wake_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | } |
Michael Ellerman | e080849 | 2005-09-01 11:29:18 +1000 | [diff] [blame] | 1280 | spin_unlock_irqrestore(&port->queue_lock, flags); |
| 1281 | } |
| 1282 | } |
| 1283 | |
| 1284 | static void veth_stop_queues(struct veth_lpar_connection *cnx) |
| 1285 | { |
| 1286 | int i; |
| 1287 | |
| 1288 | for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) { |
| 1289 | struct net_device *dev = veth_dev[i]; |
| 1290 | struct veth_port *port; |
| 1291 | |
| 1292 | if (! dev) |
| 1293 | continue; |
| 1294 | |
| 1295 | port = (struct veth_port *)dev->priv; |
| 1296 | |
| 1297 | /* If this cnx is not on the vlan for this port, continue */ |
| 1298 | if (! (port->lpar_map & (1 << cnx->remote_lp))) |
| 1299 | continue; |
| 1300 | |
| 1301 | spin_lock(&port->queue_lock); |
| 1302 | |
| 1303 | netif_stop_queue(dev); |
| 1304 | port->stopped_map |= (1 << cnx->remote_lp); |
| 1305 | |
| 1306 | veth_debug("cnx %d: stopped queue for %s, map = 0x%x.\n", |
| 1307 | cnx->remote_lp, dev->name, port->stopped_map); |
| 1308 | |
| 1309 | spin_unlock(&port->queue_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | } |
| 1311 | } |
| 1312 | |
Michael Ellerman | 24562ff | 2005-09-01 11:29:17 +1000 | [diff] [blame] | 1313 | static void veth_timed_reset(unsigned long ptr) |
| 1314 | { |
| 1315 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)ptr; |
| 1316 | unsigned long trigger_time, flags; |
| 1317 | |
| 1318 | /* FIXME is it possible this fires after veth_stop_connection()? |
| 1319 | * That would reschedule the statemachine for 5 seconds and probably |
| 1320 | * execute it after the module's been unloaded. Hmm. */ |
| 1321 | |
| 1322 | spin_lock_irqsave(&cnx->lock, flags); |
| 1323 | |
| 1324 | if (cnx->outstanding_tx > 0) { |
| 1325 | trigger_time = cnx->last_contact + cnx->reset_timeout; |
| 1326 | |
| 1327 | if (trigger_time < jiffies) { |
| 1328 | cnx->state |= VETH_STATE_RESET; |
| 1329 | veth_kick_statemachine(cnx); |
| 1330 | veth_error("%d packets not acked by LPAR %d within %d " |
| 1331 | "seconds, resetting.\n", |
| 1332 | cnx->outstanding_tx, cnx->remote_lp, |
| 1333 | cnx->reset_timeout / HZ); |
| 1334 | } else { |
| 1335 | /* Reschedule the timer */ |
| 1336 | trigger_time = jiffies + cnx->reset_timeout; |
| 1337 | mod_timer(&cnx->reset_timer, trigger_time); |
| 1338 | } |
| 1339 | } |
| 1340 | |
| 1341 | spin_unlock_irqrestore(&cnx->lock, flags); |
| 1342 | } |
| 1343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | /* |
| 1345 | * Rx path |
| 1346 | */ |
| 1347 | |
| 1348 | static inline int veth_frame_wanted(struct veth_port *port, u64 mac_addr) |
| 1349 | { |
| 1350 | int wanted = 0; |
| 1351 | int i; |
| 1352 | unsigned long flags; |
| 1353 | |
| 1354 | if ( (mac_addr == port->mac_addr) || (mac_addr == 0xffffffffffff0000) ) |
| 1355 | return 1; |
| 1356 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | read_lock_irqsave(&port->mcast_gate, flags); |
| 1358 | |
Michael Ellerman | 2a5391a | 2005-09-01 11:29:02 +1000 | [diff] [blame] | 1359 | if (port->promiscuous) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | wanted = 1; |
| 1361 | goto out; |
| 1362 | } |
| 1363 | |
| 1364 | for (i = 0; i < port->num_mcast; ++i) { |
| 1365 | if (port->mcast_addr[i] == mac_addr) { |
| 1366 | wanted = 1; |
| 1367 | break; |
| 1368 | } |
| 1369 | } |
| 1370 | |
| 1371 | out: |
| 1372 | read_unlock_irqrestore(&port->mcast_gate, flags); |
| 1373 | |
| 1374 | return wanted; |
| 1375 | } |
| 1376 | |
| 1377 | struct dma_chunk { |
| 1378 | u64 addr; |
| 1379 | u64 size; |
| 1380 | }; |
| 1381 | |
| 1382 | #define VETH_MAX_PAGES_PER_FRAME ( (VETH_MAX_MTU+PAGE_SIZE-2)/PAGE_SIZE + 1 ) |
| 1383 | |
| 1384 | static inline void veth_build_dma_list(struct dma_chunk *list, |
| 1385 | unsigned char *p, unsigned long length) |
| 1386 | { |
| 1387 | unsigned long done; |
| 1388 | int i = 1; |
| 1389 | |
| 1390 | /* FIXME: skbs are continguous in real addresses. Do we |
| 1391 | * really need to break it into PAGE_SIZE chunks, or can we do |
| 1392 | * it just at the granularity of iSeries real->absolute |
| 1393 | * mapping? Indeed, given the way the allocator works, can we |
| 1394 | * count on them being absolutely contiguous? */ |
| 1395 | list[0].addr = ISERIES_HV_ADDR(p); |
| 1396 | list[0].size = min(length, |
| 1397 | PAGE_SIZE - ((unsigned long)p & ~PAGE_MASK)); |
| 1398 | |
| 1399 | done = list[0].size; |
| 1400 | while (done < length) { |
| 1401 | list[i].addr = ISERIES_HV_ADDR(p + done); |
| 1402 | list[i].size = min(length-done, PAGE_SIZE); |
| 1403 | done += list[i].size; |
| 1404 | i++; |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | static void veth_flush_acks(struct veth_lpar_connection *cnx) |
| 1409 | { |
| 1410 | HvLpEvent_Rc rc; |
| 1411 | |
| 1412 | rc = veth_signaldata(cnx, VethEventTypeFramesAck, |
| 1413 | 0, &cnx->pending_acks); |
| 1414 | |
| 1415 | if (rc != HvLpEvent_Rc_Good) |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 1416 | veth_error("Failed acking frames from LPAR %d, rc = %d\n", |
| 1417 | cnx->remote_lp, (int)rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | |
| 1419 | cnx->num_pending_acks = 0; |
| 1420 | memset(&cnx->pending_acks, 0xff, sizeof(cnx->pending_acks)); |
| 1421 | } |
| 1422 | |
| 1423 | static void veth_receive(struct veth_lpar_connection *cnx, |
| 1424 | struct VethLpEvent *event) |
| 1425 | { |
| 1426 | struct VethFramesData *senddata = &event->u.frames_data; |
| 1427 | int startchunk = 0; |
| 1428 | int nchunks; |
| 1429 | unsigned long flags; |
| 1430 | HvLpDma_Rc rc; |
| 1431 | |
| 1432 | do { |
| 1433 | u16 length = 0; |
| 1434 | struct sk_buff *skb; |
| 1435 | struct dma_chunk local_list[VETH_MAX_PAGES_PER_FRAME]; |
| 1436 | struct dma_chunk remote_list[VETH_MAX_FRAMES_PER_MSG]; |
| 1437 | u64 dest; |
| 1438 | HvLpVirtualLanIndex vlan; |
| 1439 | struct net_device *dev; |
| 1440 | struct veth_port *port; |
| 1441 | |
| 1442 | /* FIXME: do we need this? */ |
| 1443 | memset(local_list, 0, sizeof(local_list)); |
| 1444 | memset(remote_list, 0, sizeof(VETH_MAX_FRAMES_PER_MSG)); |
| 1445 | |
| 1446 | /* a 0 address marks the end of the valid entries */ |
| 1447 | if (senddata->addr[startchunk] == 0) |
| 1448 | break; |
| 1449 | |
| 1450 | /* make sure that we have at least 1 EOF entry in the |
| 1451 | * remaining entries */ |
| 1452 | if (! (senddata->eofmask >> (startchunk + VETH_EOF_SHIFT))) { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 1453 | veth_error("Missing EOF fragment in event " |
| 1454 | "eofmask = 0x%x startchunk = %d\n", |
| 1455 | (unsigned)senddata->eofmask, |
| 1456 | startchunk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | break; |
| 1458 | } |
| 1459 | |
| 1460 | /* build list of chunks in this frame */ |
| 1461 | nchunks = 0; |
| 1462 | do { |
| 1463 | remote_list[nchunks].addr = |
| 1464 | (u64) senddata->addr[startchunk+nchunks] << 32; |
| 1465 | remote_list[nchunks].size = |
| 1466 | senddata->len[startchunk+nchunks]; |
| 1467 | length += remote_list[nchunks].size; |
| 1468 | } while (! (senddata->eofmask & |
| 1469 | (1 << (VETH_EOF_SHIFT + startchunk + nchunks++)))); |
| 1470 | |
| 1471 | /* length == total length of all chunks */ |
| 1472 | /* nchunks == # of chunks in this frame */ |
| 1473 | |
| 1474 | if ((length - ETH_HLEN) > VETH_MAX_MTU) { |
Michael Ellerman | 61a3c69 | 2005-09-01 11:28:57 +1000 | [diff] [blame] | 1475 | veth_error("Received oversize frame from LPAR %d " |
| 1476 | "(length = %d)\n", |
| 1477 | cnx->remote_lp, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | continue; |
| 1479 | } |
| 1480 | |
| 1481 | skb = alloc_skb(length, GFP_ATOMIC); |
| 1482 | if (!skb) |
| 1483 | continue; |
| 1484 | |
| 1485 | veth_build_dma_list(local_list, skb->data, length); |
| 1486 | |
| 1487 | rc = HvCallEvent_dmaBufList(HvLpEvent_Type_VirtualLan, |
| 1488 | event->base_event.xSourceLp, |
| 1489 | HvLpDma_Direction_RemoteToLocal, |
| 1490 | cnx->src_inst, |
| 1491 | cnx->dst_inst, |
| 1492 | HvLpDma_AddressType_RealAddress, |
| 1493 | HvLpDma_AddressType_TceIndex, |
| 1494 | ISERIES_HV_ADDR(&local_list), |
| 1495 | ISERIES_HV_ADDR(&remote_list), |
| 1496 | length); |
| 1497 | if (rc != HvLpDma_Rc_Good) { |
| 1498 | dev_kfree_skb_irq(skb); |
| 1499 | continue; |
| 1500 | } |
| 1501 | |
| 1502 | vlan = skb->data[9]; |
| 1503 | dev = veth_dev[vlan]; |
Michael Ellerman | 41664c0 | 2005-05-12 17:55:08 +1000 | [diff] [blame] | 1504 | if (! dev) { |
| 1505 | /* |
| 1506 | * Some earlier versions of the driver sent |
| 1507 | * broadcasts down all connections, even to lpars |
| 1508 | * that weren't on the relevant vlan. So ignore |
| 1509 | * packets belonging to a vlan we're not on. |
| 1510 | * We can also be here if we receive packets while |
| 1511 | * the driver is going down, because then dev is NULL. |
| 1512 | */ |
| 1513 | dev_kfree_skb_irq(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | continue; |
Michael Ellerman | 41664c0 | 2005-05-12 17:55:08 +1000 | [diff] [blame] | 1515 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | |
| 1517 | port = (struct veth_port *)dev->priv; |
| 1518 | dest = *((u64 *) skb->data) & 0xFFFFFFFFFFFF0000; |
| 1519 | |
| 1520 | if ((vlan > HVMAXARCHITECTEDVIRTUALLANS) || !port) { |
| 1521 | dev_kfree_skb_irq(skb); |
| 1522 | continue; |
| 1523 | } |
| 1524 | if (! veth_frame_wanted(port, dest)) { |
| 1525 | dev_kfree_skb_irq(skb); |
| 1526 | continue; |
| 1527 | } |
| 1528 | |
| 1529 | skb_put(skb, length); |
| 1530 | skb->dev = dev; |
| 1531 | skb->protocol = eth_type_trans(skb, dev); |
| 1532 | skb->ip_summed = CHECKSUM_NONE; |
| 1533 | netif_rx(skb); /* send it up */ |
| 1534 | port->stats.rx_packets++; |
| 1535 | port->stats.rx_bytes += length; |
| 1536 | } while (startchunk += nchunks, startchunk < VETH_MAX_FRAMES_PER_MSG); |
| 1537 | |
| 1538 | /* Ack it */ |
| 1539 | spin_lock_irqsave(&cnx->lock, flags); |
| 1540 | BUG_ON(cnx->num_pending_acks > VETH_MAX_ACKS_PER_MSG); |
| 1541 | |
| 1542 | cnx->pending_acks[cnx->num_pending_acks++] = |
| 1543 | event->base_event.xCorrelationToken; |
| 1544 | |
| 1545 | if ( (cnx->num_pending_acks >= cnx->remote_caps.ack_threshold) |
| 1546 | || (cnx->num_pending_acks >= VETH_MAX_ACKS_PER_MSG) ) |
| 1547 | veth_flush_acks(cnx); |
| 1548 | |
| 1549 | spin_unlock_irqrestore(&cnx->lock, flags); |
| 1550 | } |
| 1551 | |
| 1552 | static void veth_timed_ack(unsigned long ptr) |
| 1553 | { |
| 1554 | struct veth_lpar_connection *cnx = (struct veth_lpar_connection *) ptr; |
| 1555 | unsigned long flags; |
| 1556 | |
| 1557 | /* Ack all the events */ |
| 1558 | spin_lock_irqsave(&cnx->lock, flags); |
| 1559 | if (cnx->num_pending_acks > 0) |
| 1560 | veth_flush_acks(cnx); |
| 1561 | |
| 1562 | /* Reschedule the timer */ |
| 1563 | cnx->ack_timer.expires = jiffies + cnx->ack_timeout; |
| 1564 | add_timer(&cnx->ack_timer); |
| 1565 | spin_unlock_irqrestore(&cnx->lock, flags); |
| 1566 | } |
| 1567 | |
| 1568 | static int veth_remove(struct vio_dev *vdev) |
| 1569 | { |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1570 | struct veth_lpar_connection *cnx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | struct net_device *dev; |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1572 | struct veth_port *port; |
| 1573 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1575 | dev = veth_dev[vdev->unit_address]; |
| 1576 | |
| 1577 | if (! dev) |
| 1578 | return 0; |
| 1579 | |
| 1580 | port = netdev_priv(dev); |
| 1581 | |
| 1582 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { |
| 1583 | cnx = veth_cnx[i]; |
| 1584 | |
| 1585 | if (cnx && (port->lpar_map & (1 << i))) { |
| 1586 | /* Drop our reference to connections on our VLAN */ |
| 1587 | kobject_put(&cnx->kobject); |
| 1588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | } |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1590 | |
| 1591 | veth_dev[vdev->unit_address] = NULL; |
Michael Ellerman | 07a5c17 | 2005-09-01 11:29:21 +1000 | [diff] [blame] | 1592 | kobject_del(&port->kobject); |
| 1593 | kobject_put(&port->kobject); |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1594 | unregister_netdev(dev); |
| 1595 | free_netdev(dev); |
| 1596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | return 0; |
| 1598 | } |
| 1599 | |
| 1600 | static int veth_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
| 1601 | { |
| 1602 | int i = vdev->unit_address; |
| 1603 | struct net_device *dev; |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1604 | struct veth_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | |
| 1606 | dev = veth_probe_one(i, &vdev->dev); |
| 1607 | if (dev == NULL) { |
| 1608 | veth_remove(vdev); |
| 1609 | return 1; |
| 1610 | } |
| 1611 | veth_dev[i] = dev; |
| 1612 | |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1613 | port = (struct veth_port*)netdev_priv(dev); |
| 1614 | |
| 1615 | /* Start the state machine on each connection on this vlan. If we're |
| 1616 | * the first dev to do so this will commence link negotiation */ |
| 1617 | for (i = 0; i < HVMAXARCHITECTEDLPS; i++) { |
| 1618 | struct veth_lpar_connection *cnx; |
| 1619 | |
| 1620 | if (! (port->lpar_map & (1 << i))) |
| 1621 | continue; |
| 1622 | |
| 1623 | cnx = veth_cnx[i]; |
| 1624 | if (!cnx) |
| 1625 | continue; |
| 1626 | |
| 1627 | kobject_get(&cnx->kobject); |
| 1628 | veth_kick_statemachine(cnx); |
| 1629 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | |
| 1631 | return 0; |
| 1632 | } |
| 1633 | |
| 1634 | /** |
| 1635 | * veth_device_table: Used by vio.c to match devices that we |
| 1636 | * support. |
| 1637 | */ |
| 1638 | static struct vio_device_id veth_device_table[] __devinitdata = { |
| 1639 | { "vlan", "" }, |
Stephen Rothwell | fb120da | 2005-08-17 16:42:59 +1000 | [diff] [blame] | 1640 | { "", "" } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | }; |
| 1642 | MODULE_DEVICE_TABLE(vio, veth_device_table); |
| 1643 | |
| 1644 | static struct vio_driver veth_driver = { |
| 1645 | .name = "iseries_veth", |
| 1646 | .id_table = veth_device_table, |
| 1647 | .probe = veth_probe, |
| 1648 | .remove = veth_remove |
| 1649 | }; |
| 1650 | |
| 1651 | /* |
| 1652 | * Module initialization/cleanup |
| 1653 | */ |
| 1654 | |
| 1655 | void __exit veth_module_cleanup(void) |
| 1656 | { |
| 1657 | int i; |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1658 | struct veth_lpar_connection *cnx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1660 | /* Disconnect our "irq" to stop events coming from the Hypervisor. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan); |
| 1662 | |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1663 | /* Make sure any work queued from Hypervisor callbacks is finished. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | flush_scheduled_work(); |
| 1665 | |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1666 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
| 1667 | cnx = veth_cnx[i]; |
| 1668 | |
| 1669 | if (!cnx) |
| 1670 | continue; |
| 1671 | |
Michael Ellerman | 76812d812 | 2005-09-01 11:29:20 +1000 | [diff] [blame] | 1672 | /* Remove the connection from sysfs */ |
| 1673 | kobject_del(&cnx->kobject); |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1674 | /* Drop the driver's reference to the connection */ |
| 1675 | kobject_put(&cnx->kobject); |
| 1676 | } |
| 1677 | |
| 1678 | /* Unregister the driver, which will close all the netdevs and stop |
| 1679 | * the connections when they're no longer referenced. */ |
Michael Ellerman | b2e0852 | 2005-05-12 18:09:45 +1000 | [diff] [blame] | 1680 | vio_unregister_driver(&veth_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | } |
| 1682 | module_exit(veth_module_cleanup); |
| 1683 | |
| 1684 | int __init veth_module_init(void) |
| 1685 | { |
| 1686 | int i; |
| 1687 | int rc; |
| 1688 | |
| 1689 | this_lp = HvLpConfig_getLpIndex_outline(); |
| 1690 | |
| 1691 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
| 1692 | rc = veth_init_connection(i); |
Michael Ellerman | ec60bee | 2005-09-01 11:29:08 +1000 | [diff] [blame] | 1693 | if (rc != 0) |
| 1694 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | } |
| 1696 | |
| 1697 | HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan, |
| 1698 | &veth_handle_event); |
| 1699 | |
Michael Ellerman | ec60bee | 2005-09-01 11:29:08 +1000 | [diff] [blame] | 1700 | rc = vio_register_driver(&veth_driver); |
| 1701 | if (rc != 0) |
| 1702 | goto error; |
| 1703 | |
Michael Ellerman | 76812d812 | 2005-09-01 11:29:20 +1000 | [diff] [blame] | 1704 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
| 1705 | struct kobject *kobj; |
| 1706 | |
| 1707 | if (!veth_cnx[i]) |
| 1708 | continue; |
| 1709 | |
| 1710 | kobj = &veth_cnx[i]->kobject; |
| 1711 | kobj->parent = &veth_driver.driver.kobj; |
| 1712 | /* If the add failes, complain but otherwise continue */ |
| 1713 | if (0 != kobject_add(kobj)) |
| 1714 | veth_error("cnx %d: Failed adding to sysfs.\n", i); |
| 1715 | } |
| 1716 | |
Michael Ellerman | ec60bee | 2005-09-01 11:29:08 +1000 | [diff] [blame] | 1717 | return 0; |
| 1718 | |
| 1719 | error: |
| 1720 | for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { |
Michael Ellerman | f0c129c | 2005-09-01 11:29:09 +1000 | [diff] [blame] | 1721 | veth_destroy_connection(veth_cnx[i]); |
Michael Ellerman | ec60bee | 2005-09-01 11:29:08 +1000 | [diff] [blame] | 1722 | } |
| 1723 | |
| 1724 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | } |
| 1726 | module_init(veth_module_init); |