xref: /openbmc/linux/drivers/net/ethernet/ibm/ibmvnic.c (revision 680ef72a)
1 /**************************************************************************/
2 /*                                                                        */
3 /*  IBM System i and System p Virtual NIC Device Driver                   */
4 /*  Copyright (C) 2014 IBM Corp.                                          */
5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
8 /*                                                                        */
9 /*  This program is free software; you can redistribute it and/or modify  */
10 /*  it under the terms of the GNU General Public License as published by  */
11 /*  the Free Software Foundation; either version 2 of the License, or     */
12 /*  (at your option) any later version.                                   */
13 /*                                                                        */
14 /*  This program is distributed in the hope that it will be useful,       */
15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
17 /*  GNU General Public License for more details.                          */
18 /*                                                                        */
19 /*  You should have received a copy of the GNU General Public License     */
20 /*  along with this program.                                              */
21 /*                                                                        */
22 /* This module contains the implementation of a virtual ethernet device   */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
26 /*									   */
27 /* Messages are passed between the VNIC driver and the VNIC server using  */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
31 /* are used by the driver to notify the server that a packet is           */
32 /* ready for transmission or that a buffer has been added to receive a    */
33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
34 /* driver that a packet transmission has been completed or that a packet  */
35 /* has been received and placed in a waiting buffer.                      */
36 /*                                                                        */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
39 /* or receive has been completed, the VNIC driver is required to use      */
40 /* "long term mapping". This entails that large, continuous DMA mapped    */
41 /* buffers are allocated on driver initialization and these buffers are   */
42 /* then continuously reused to pass skbs to and from the VNIC server.     */
43 /*                                                                        */
44 /**************************************************************************/
45 
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/mm.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/in.h>
63 #include <linux/ip.h>
64 #include <linux/ipv6.h>
65 #include <linux/irq.h>
66 #include <linux/kthread.h>
67 #include <linux/seq_file.h>
68 #include <linux/interrupt.h>
69 #include <net/net_namespace.h>
70 #include <asm/hvcall.h>
71 #include <linux/atomic.h>
72 #include <asm/vio.h>
73 #include <asm/iommu.h>
74 #include <linux/uaccess.h>
75 #include <asm/firmware.h>
76 #include <linux/workqueue.h>
77 #include <linux/if_vlan.h>
78 #include <linux/utsname.h>
79 
80 #include "ibmvnic.h"
81 
82 static const char ibmvnic_driver_name[] = "ibmvnic";
83 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
84 
85 MODULE_AUTHOR("Santiago Leon");
86 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
87 MODULE_LICENSE("GPL");
88 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
89 
90 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
91 static int ibmvnic_remove(struct vio_dev *);
92 static void release_sub_crqs(struct ibmvnic_adapter *);
93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
98 		       union sub_crq *sub_crq);
99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
101 static int enable_scrq_irq(struct ibmvnic_adapter *,
102 			   struct ibmvnic_sub_crq_queue *);
103 static int disable_scrq_irq(struct ibmvnic_adapter *,
104 			    struct ibmvnic_sub_crq_queue *);
105 static int pending_scrq(struct ibmvnic_adapter *,
106 			struct ibmvnic_sub_crq_queue *);
107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
108 					struct ibmvnic_sub_crq_queue *);
109 static int ibmvnic_poll(struct napi_struct *napi, int data);
110 static void send_map_query(struct ibmvnic_adapter *adapter);
111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
112 static void send_request_unmap(struct ibmvnic_adapter *, u8);
113 static void send_login(struct ibmvnic_adapter *adapter);
114 static void send_cap_queries(struct ibmvnic_adapter *adapter);
115 static int init_sub_crqs(struct ibmvnic_adapter *);
116 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
117 static int ibmvnic_init(struct ibmvnic_adapter *);
118 static void release_crq_queue(struct ibmvnic_adapter *);
119 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
120 
121 struct ibmvnic_stat {
122 	char name[ETH_GSTRING_LEN];
123 	int offset;
124 };
125 
126 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
127 			     offsetof(struct ibmvnic_statistics, stat))
128 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
129 
130 static const struct ibmvnic_stat ibmvnic_stats[] = {
131 	{"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
132 	{"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
133 	{"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
134 	{"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
135 	{"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
136 	{"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
137 	{"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
138 	{"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
139 	{"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
140 	{"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
141 	{"align_errors", IBMVNIC_STAT_OFF(align_errors)},
142 	{"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
143 	{"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
144 	{"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
145 	{"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
146 	{"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
147 	{"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
148 	{"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
149 	{"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
150 	{"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
151 	{"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
152 	{"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
153 };
154 
155 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
156 			  unsigned long length, unsigned long *number,
157 			  unsigned long *irq)
158 {
159 	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
160 	long rc;
161 
162 	rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
163 	*number = retbuf[0];
164 	*irq = retbuf[1];
165 
166 	return rc;
167 }
168 
169 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
170 				struct ibmvnic_long_term_buff *ltb, int size)
171 {
172 	struct device *dev = &adapter->vdev->dev;
173 
174 	ltb->size = size;
175 	ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
176 				       GFP_KERNEL);
177 
178 	if (!ltb->buff) {
179 		dev_err(dev, "Couldn't alloc long term buffer\n");
180 		return -ENOMEM;
181 	}
182 	ltb->map_id = adapter->map_id;
183 	adapter->map_id++;
184 
185 	init_completion(&adapter->fw_done);
186 	send_request_map(adapter, ltb->addr,
187 			 ltb->size, ltb->map_id);
188 	wait_for_completion(&adapter->fw_done);
189 
190 	if (adapter->fw_done_rc) {
191 		dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
192 			adapter->fw_done_rc);
193 		return -1;
194 	}
195 	return 0;
196 }
197 
198 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
199 				struct ibmvnic_long_term_buff *ltb)
200 {
201 	struct device *dev = &adapter->vdev->dev;
202 
203 	if (!ltb->buff)
204 		return;
205 
206 	if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
207 	    adapter->reset_reason != VNIC_RESET_MOBILITY)
208 		send_request_unmap(adapter, ltb->map_id);
209 	dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
210 }
211 
212 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
213 				struct ibmvnic_long_term_buff *ltb)
214 {
215 	memset(ltb->buff, 0, ltb->size);
216 
217 	init_completion(&adapter->fw_done);
218 	send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
219 	wait_for_completion(&adapter->fw_done);
220 
221 	if (adapter->fw_done_rc) {
222 		dev_info(&adapter->vdev->dev,
223 			 "Reset failed, attempting to free and reallocate buffer\n");
224 		free_long_term_buff(adapter, ltb);
225 		return alloc_long_term_buff(adapter, ltb, ltb->size);
226 	}
227 	return 0;
228 }
229 
230 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
231 {
232 	int i;
233 
234 	for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
235 	     i++)
236 		adapter->rx_pool[i].active = 0;
237 }
238 
239 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
240 			      struct ibmvnic_rx_pool *pool)
241 {
242 	int count = pool->size - atomic_read(&pool->available);
243 	struct device *dev = &adapter->vdev->dev;
244 	int buffers_added = 0;
245 	unsigned long lpar_rc;
246 	union sub_crq sub_crq;
247 	struct sk_buff *skb;
248 	unsigned int offset;
249 	dma_addr_t dma_addr;
250 	unsigned char *dst;
251 	u64 *handle_array;
252 	int shift = 0;
253 	int index;
254 	int i;
255 
256 	if (!pool->active)
257 		return;
258 
259 	handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
260 				      be32_to_cpu(adapter->login_rsp_buf->
261 				      off_rxadd_subcrqs));
262 
263 	for (i = 0; i < count; ++i) {
264 		skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
265 		if (!skb) {
266 			dev_err(dev, "Couldn't replenish rx buff\n");
267 			adapter->replenish_no_mem++;
268 			break;
269 		}
270 
271 		index = pool->free_map[pool->next_free];
272 
273 		if (pool->rx_buff[index].skb)
274 			dev_err(dev, "Inconsistent free_map!\n");
275 
276 		/* Copy the skb to the long term mapped DMA buffer */
277 		offset = index * pool->buff_size;
278 		dst = pool->long_term_buff.buff + offset;
279 		memset(dst, 0, pool->buff_size);
280 		dma_addr = pool->long_term_buff.addr + offset;
281 		pool->rx_buff[index].data = dst;
282 
283 		pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
284 		pool->rx_buff[index].dma = dma_addr;
285 		pool->rx_buff[index].skb = skb;
286 		pool->rx_buff[index].pool_index = pool->index;
287 		pool->rx_buff[index].size = pool->buff_size;
288 
289 		memset(&sub_crq, 0, sizeof(sub_crq));
290 		sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
291 		sub_crq.rx_add.correlator =
292 		    cpu_to_be64((u64)&pool->rx_buff[index]);
293 		sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
294 		sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
295 
296 		/* The length field of the sCRQ is defined to be 24 bits so the
297 		 * buffer size needs to be left shifted by a byte before it is
298 		 * converted to big endian to prevent the last byte from being
299 		 * truncated.
300 		 */
301 #ifdef __LITTLE_ENDIAN__
302 		shift = 8;
303 #endif
304 		sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
305 
306 		lpar_rc = send_subcrq(adapter, handle_array[pool->index],
307 				      &sub_crq);
308 		if (lpar_rc != H_SUCCESS)
309 			goto failure;
310 
311 		buffers_added++;
312 		adapter->replenish_add_buff_success++;
313 		pool->next_free = (pool->next_free + 1) % pool->size;
314 	}
315 	atomic_add(buffers_added, &pool->available);
316 	return;
317 
318 failure:
319 	dev_info(dev, "replenish pools failure\n");
320 	pool->free_map[pool->next_free] = index;
321 	pool->rx_buff[index].skb = NULL;
322 	if (!dma_mapping_error(dev, dma_addr))
323 		dma_unmap_single(dev, dma_addr, pool->buff_size,
324 				 DMA_FROM_DEVICE);
325 
326 	dev_kfree_skb_any(skb);
327 	adapter->replenish_add_buff_failure++;
328 	atomic_add(buffers_added, &pool->available);
329 
330 	if (lpar_rc == H_CLOSED) {
331 		/* Disable buffer pool replenishment and report carrier off if
332 		 * queue is closed. Firmware guarantees that a signal will
333 		 * be sent to the driver, triggering a reset.
334 		 */
335 		deactivate_rx_pools(adapter);
336 		netif_carrier_off(adapter->netdev);
337 	}
338 }
339 
340 static void replenish_pools(struct ibmvnic_adapter *adapter)
341 {
342 	int i;
343 
344 	adapter->replenish_task_cycles++;
345 	for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
346 	     i++) {
347 		if (adapter->rx_pool[i].active)
348 			replenish_rx_pool(adapter, &adapter->rx_pool[i]);
349 	}
350 }
351 
352 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
353 {
354 	kfree(adapter->tx_stats_buffers);
355 	kfree(adapter->rx_stats_buffers);
356 }
357 
358 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
359 {
360 	adapter->tx_stats_buffers =
361 				kcalloc(adapter->req_tx_queues,
362 					sizeof(struct ibmvnic_tx_queue_stats),
363 					GFP_KERNEL);
364 	if (!adapter->tx_stats_buffers)
365 		return -ENOMEM;
366 
367 	adapter->rx_stats_buffers =
368 				kcalloc(adapter->req_rx_queues,
369 					sizeof(struct ibmvnic_rx_queue_stats),
370 					GFP_KERNEL);
371 	if (!adapter->rx_stats_buffers)
372 		return -ENOMEM;
373 
374 	return 0;
375 }
376 
377 static void release_stats_token(struct ibmvnic_adapter *adapter)
378 {
379 	struct device *dev = &adapter->vdev->dev;
380 
381 	if (!adapter->stats_token)
382 		return;
383 
384 	dma_unmap_single(dev, adapter->stats_token,
385 			 sizeof(struct ibmvnic_statistics),
386 			 DMA_FROM_DEVICE);
387 	adapter->stats_token = 0;
388 }
389 
390 static int init_stats_token(struct ibmvnic_adapter *adapter)
391 {
392 	struct device *dev = &adapter->vdev->dev;
393 	dma_addr_t stok;
394 
395 	stok = dma_map_single(dev, &adapter->stats,
396 			      sizeof(struct ibmvnic_statistics),
397 			      DMA_FROM_DEVICE);
398 	if (dma_mapping_error(dev, stok)) {
399 		dev_err(dev, "Couldn't map stats buffer\n");
400 		return -1;
401 	}
402 
403 	adapter->stats_token = stok;
404 	netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
405 	return 0;
406 }
407 
408 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
409 {
410 	struct ibmvnic_rx_pool *rx_pool;
411 	int rx_scrqs;
412 	int i, j, rc;
413 
414 	rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
415 	for (i = 0; i < rx_scrqs; i++) {
416 		rx_pool = &adapter->rx_pool[i];
417 
418 		netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
419 
420 		rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
421 		if (rc)
422 			return rc;
423 
424 		for (j = 0; j < rx_pool->size; j++)
425 			rx_pool->free_map[j] = j;
426 
427 		memset(rx_pool->rx_buff, 0,
428 		       rx_pool->size * sizeof(struct ibmvnic_rx_buff));
429 
430 		atomic_set(&rx_pool->available, 0);
431 		rx_pool->next_alloc = 0;
432 		rx_pool->next_free = 0;
433 		rx_pool->active = 1;
434 	}
435 
436 	return 0;
437 }
438 
439 static void release_rx_pools(struct ibmvnic_adapter *adapter)
440 {
441 	struct ibmvnic_rx_pool *rx_pool;
442 	int rx_scrqs;
443 	int i, j;
444 
445 	if (!adapter->rx_pool)
446 		return;
447 
448 	rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
449 	for (i = 0; i < rx_scrqs; i++) {
450 		rx_pool = &adapter->rx_pool[i];
451 
452 		netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
453 
454 		kfree(rx_pool->free_map);
455 		free_long_term_buff(adapter, &rx_pool->long_term_buff);
456 
457 		if (!rx_pool->rx_buff)
458 			continue;
459 
460 		for (j = 0; j < rx_pool->size; j++) {
461 			if (rx_pool->rx_buff[j].skb) {
462 				dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
463 				rx_pool->rx_buff[i].skb = NULL;
464 			}
465 		}
466 
467 		kfree(rx_pool->rx_buff);
468 	}
469 
470 	kfree(adapter->rx_pool);
471 	adapter->rx_pool = NULL;
472 }
473 
474 static int init_rx_pools(struct net_device *netdev)
475 {
476 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
477 	struct device *dev = &adapter->vdev->dev;
478 	struct ibmvnic_rx_pool *rx_pool;
479 	int rxadd_subcrqs;
480 	u64 *size_array;
481 	int i, j;
482 
483 	rxadd_subcrqs =
484 		be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
485 	size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
486 		be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
487 
488 	adapter->rx_pool = kcalloc(rxadd_subcrqs,
489 				   sizeof(struct ibmvnic_rx_pool),
490 				   GFP_KERNEL);
491 	if (!adapter->rx_pool) {
492 		dev_err(dev, "Failed to allocate rx pools\n");
493 		return -1;
494 	}
495 
496 	for (i = 0; i < rxadd_subcrqs; i++) {
497 		rx_pool = &adapter->rx_pool[i];
498 
499 		netdev_dbg(adapter->netdev,
500 			   "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
501 			   i, adapter->req_rx_add_entries_per_subcrq,
502 			   be64_to_cpu(size_array[i]));
503 
504 		rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
505 		rx_pool->index = i;
506 		rx_pool->buff_size = be64_to_cpu(size_array[i]);
507 		rx_pool->active = 1;
508 
509 		rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
510 					    GFP_KERNEL);
511 		if (!rx_pool->free_map) {
512 			release_rx_pools(adapter);
513 			return -1;
514 		}
515 
516 		rx_pool->rx_buff = kcalloc(rx_pool->size,
517 					   sizeof(struct ibmvnic_rx_buff),
518 					   GFP_KERNEL);
519 		if (!rx_pool->rx_buff) {
520 			dev_err(dev, "Couldn't alloc rx buffers\n");
521 			release_rx_pools(adapter);
522 			return -1;
523 		}
524 
525 		if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
526 					 rx_pool->size * rx_pool->buff_size)) {
527 			release_rx_pools(adapter);
528 			return -1;
529 		}
530 
531 		for (j = 0; j < rx_pool->size; ++j)
532 			rx_pool->free_map[j] = j;
533 
534 		atomic_set(&rx_pool->available, 0);
535 		rx_pool->next_alloc = 0;
536 		rx_pool->next_free = 0;
537 	}
538 
539 	return 0;
540 }
541 
542 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
543 {
544 	struct ibmvnic_tx_pool *tx_pool;
545 	int tx_scrqs;
546 	int i, j, rc;
547 
548 	tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
549 	for (i = 0; i < tx_scrqs; i++) {
550 		netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
551 
552 		tx_pool = &adapter->tx_pool[i];
553 
554 		rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
555 		if (rc)
556 			return rc;
557 
558 		rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
559 		if (rc)
560 			return rc;
561 
562 		memset(tx_pool->tx_buff, 0,
563 		       adapter->req_tx_entries_per_subcrq *
564 		       sizeof(struct ibmvnic_tx_buff));
565 
566 		for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
567 			tx_pool->free_map[j] = j;
568 
569 		tx_pool->consumer_index = 0;
570 		tx_pool->producer_index = 0;
571 		tx_pool->tso_index = 0;
572 	}
573 
574 	return 0;
575 }
576 
577 static void release_vpd_data(struct ibmvnic_adapter *adapter)
578 {
579 	if (!adapter->vpd)
580 		return;
581 
582 	kfree(adapter->vpd->buff);
583 	kfree(adapter->vpd);
584 }
585 
586 static void release_tx_pools(struct ibmvnic_adapter *adapter)
587 {
588 	struct ibmvnic_tx_pool *tx_pool;
589 	int i, tx_scrqs;
590 
591 	if (!adapter->tx_pool)
592 		return;
593 
594 	tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
595 	for (i = 0; i < tx_scrqs; i++) {
596 		netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
597 		tx_pool = &adapter->tx_pool[i];
598 		kfree(tx_pool->tx_buff);
599 		free_long_term_buff(adapter, &tx_pool->long_term_buff);
600 		free_long_term_buff(adapter, &tx_pool->tso_ltb);
601 		kfree(tx_pool->free_map);
602 	}
603 
604 	kfree(adapter->tx_pool);
605 	adapter->tx_pool = NULL;
606 }
607 
608 static int init_tx_pools(struct net_device *netdev)
609 {
610 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
611 	struct device *dev = &adapter->vdev->dev;
612 	struct ibmvnic_tx_pool *tx_pool;
613 	int tx_subcrqs;
614 	int i, j;
615 
616 	tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
617 	adapter->tx_pool = kcalloc(tx_subcrqs,
618 				   sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
619 	if (!adapter->tx_pool)
620 		return -1;
621 
622 	for (i = 0; i < tx_subcrqs; i++) {
623 		tx_pool = &adapter->tx_pool[i];
624 
625 		netdev_dbg(adapter->netdev,
626 			   "Initializing tx_pool[%d], %lld buffs\n",
627 			   i, adapter->req_tx_entries_per_subcrq);
628 
629 		tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
630 					   sizeof(struct ibmvnic_tx_buff),
631 					   GFP_KERNEL);
632 		if (!tx_pool->tx_buff) {
633 			dev_err(dev, "tx pool buffer allocation failed\n");
634 			release_tx_pools(adapter);
635 			return -1;
636 		}
637 
638 		if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
639 					 adapter->req_tx_entries_per_subcrq *
640 					 adapter->req_mtu)) {
641 			release_tx_pools(adapter);
642 			return -1;
643 		}
644 
645 		/* alloc TSO ltb */
646 		if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
647 					 IBMVNIC_TSO_BUFS *
648 					 IBMVNIC_TSO_BUF_SZ)) {
649 			release_tx_pools(adapter);
650 			return -1;
651 		}
652 
653 		tx_pool->tso_index = 0;
654 
655 		tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
656 					    sizeof(int), GFP_KERNEL);
657 		if (!tx_pool->free_map) {
658 			release_tx_pools(adapter);
659 			return -1;
660 		}
661 
662 		for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
663 			tx_pool->free_map[j] = j;
664 
665 		tx_pool->consumer_index = 0;
666 		tx_pool->producer_index = 0;
667 	}
668 
669 	return 0;
670 }
671 
672 static void release_error_buffers(struct ibmvnic_adapter *adapter)
673 {
674 	struct device *dev = &adapter->vdev->dev;
675 	struct ibmvnic_error_buff *error_buff, *tmp;
676 	unsigned long flags;
677 
678 	spin_lock_irqsave(&adapter->error_list_lock, flags);
679 	list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
680 		list_del(&error_buff->list);
681 		dma_unmap_single(dev, error_buff->dma, error_buff->len,
682 				 DMA_FROM_DEVICE);
683 		kfree(error_buff->buff);
684 		kfree(error_buff);
685 	}
686 	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
687 }
688 
689 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
690 {
691 	int i;
692 
693 	if (adapter->napi_enabled)
694 		return;
695 
696 	for (i = 0; i < adapter->req_rx_queues; i++)
697 		napi_enable(&adapter->napi[i]);
698 
699 	adapter->napi_enabled = true;
700 }
701 
702 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
703 {
704 	int i;
705 
706 	if (!adapter->napi_enabled)
707 		return;
708 
709 	for (i = 0; i < adapter->req_rx_queues; i++) {
710 		netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
711 		napi_disable(&adapter->napi[i]);
712 	}
713 
714 	adapter->napi_enabled = false;
715 }
716 
717 static int ibmvnic_login(struct net_device *netdev)
718 {
719 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
720 	unsigned long timeout = msecs_to_jiffies(30000);
721 	struct device *dev = &adapter->vdev->dev;
722 	int rc;
723 
724 	do {
725 		if (adapter->renegotiate) {
726 			adapter->renegotiate = false;
727 			release_sub_crqs(adapter);
728 
729 			reinit_completion(&adapter->init_done);
730 			send_cap_queries(adapter);
731 			if (!wait_for_completion_timeout(&adapter->init_done,
732 							 timeout)) {
733 				dev_err(dev, "Capabilities query timeout\n");
734 				return -1;
735 			}
736 			rc = init_sub_crqs(adapter);
737 			if (rc) {
738 				dev_err(dev,
739 					"Initialization of SCRQ's failed\n");
740 				return -1;
741 			}
742 			rc = init_sub_crq_irqs(adapter);
743 			if (rc) {
744 				dev_err(dev,
745 					"Initialization of SCRQ's irqs failed\n");
746 				return -1;
747 			}
748 		}
749 
750 		reinit_completion(&adapter->init_done);
751 		send_login(adapter);
752 		if (!wait_for_completion_timeout(&adapter->init_done,
753 						 timeout)) {
754 			dev_err(dev, "Login timeout\n");
755 			return -1;
756 		}
757 	} while (adapter->renegotiate);
758 
759 	return 0;
760 }
761 
762 static void release_resources(struct ibmvnic_adapter *adapter)
763 {
764 	int i;
765 
766 	release_vpd_data(adapter);
767 
768 	release_tx_pools(adapter);
769 	release_rx_pools(adapter);
770 
771 	release_stats_token(adapter);
772 	release_stats_buffers(adapter);
773 	release_error_buffers(adapter);
774 
775 	if (adapter->napi) {
776 		for (i = 0; i < adapter->req_rx_queues; i++) {
777 			if (&adapter->napi[i]) {
778 				netdev_dbg(adapter->netdev,
779 					   "Releasing napi[%d]\n", i);
780 				netif_napi_del(&adapter->napi[i]);
781 			}
782 		}
783 	}
784 }
785 
786 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
787 {
788 	struct net_device *netdev = adapter->netdev;
789 	unsigned long timeout = msecs_to_jiffies(30000);
790 	union ibmvnic_crq crq;
791 	bool resend;
792 	int rc;
793 
794 	netdev_dbg(netdev, "setting link state %d\n", link_state);
795 
796 	memset(&crq, 0, sizeof(crq));
797 	crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
798 	crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
799 	crq.logical_link_state.link_state = link_state;
800 
801 	do {
802 		resend = false;
803 
804 		reinit_completion(&adapter->init_done);
805 		rc = ibmvnic_send_crq(adapter, &crq);
806 		if (rc) {
807 			netdev_err(netdev, "Failed to set link state\n");
808 			return rc;
809 		}
810 
811 		if (!wait_for_completion_timeout(&adapter->init_done,
812 						 timeout)) {
813 			netdev_err(netdev, "timeout setting link state\n");
814 			return -1;
815 		}
816 
817 		if (adapter->init_done_rc == 1) {
818 			/* Partuial success, delay and re-send */
819 			mdelay(1000);
820 			resend = true;
821 		}
822 	} while (resend);
823 
824 	return 0;
825 }
826 
827 static int set_real_num_queues(struct net_device *netdev)
828 {
829 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
830 	int rc;
831 
832 	netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
833 		   adapter->req_tx_queues, adapter->req_rx_queues);
834 
835 	rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
836 	if (rc) {
837 		netdev_err(netdev, "failed to set the number of tx queues\n");
838 		return rc;
839 	}
840 
841 	rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
842 	if (rc)
843 		netdev_err(netdev, "failed to set the number of rx queues\n");
844 
845 	return rc;
846 }
847 
848 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
849 {
850 	struct device *dev = &adapter->vdev->dev;
851 	union ibmvnic_crq crq;
852 	int len = 0;
853 
854 	if (adapter->vpd->buff)
855 		len = adapter->vpd->len;
856 
857 	reinit_completion(&adapter->fw_done);
858 	crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
859 	crq.get_vpd_size.cmd = GET_VPD_SIZE;
860 	ibmvnic_send_crq(adapter, &crq);
861 	wait_for_completion(&adapter->fw_done);
862 
863 	if (!adapter->vpd->len)
864 		return -ENODATA;
865 
866 	if (!adapter->vpd->buff)
867 		adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
868 	else if (adapter->vpd->len != len)
869 		adapter->vpd->buff =
870 			krealloc(adapter->vpd->buff,
871 				 adapter->vpd->len, GFP_KERNEL);
872 
873 	if (!adapter->vpd->buff) {
874 		dev_err(dev, "Could allocate VPD buffer\n");
875 		return -ENOMEM;
876 	}
877 
878 	adapter->vpd->dma_addr =
879 		dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
880 			       DMA_FROM_DEVICE);
881 	if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
882 		dev_err(dev, "Could not map VPD buffer\n");
883 		kfree(adapter->vpd->buff);
884 		return -ENOMEM;
885 	}
886 
887 	reinit_completion(&adapter->fw_done);
888 	crq.get_vpd.first = IBMVNIC_CRQ_CMD;
889 	crq.get_vpd.cmd = GET_VPD;
890 	crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
891 	crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
892 	ibmvnic_send_crq(adapter, &crq);
893 	wait_for_completion(&adapter->fw_done);
894 
895 	return 0;
896 }
897 
898 static int init_resources(struct ibmvnic_adapter *adapter)
899 {
900 	struct net_device *netdev = adapter->netdev;
901 	int i, rc;
902 
903 	rc = set_real_num_queues(netdev);
904 	if (rc)
905 		return rc;
906 
907 	rc = init_stats_buffers(adapter);
908 	if (rc)
909 		return rc;
910 
911 	rc = init_stats_token(adapter);
912 	if (rc)
913 		return rc;
914 
915 	adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
916 	if (!adapter->vpd)
917 		return -ENOMEM;
918 
919 	adapter->map_id = 1;
920 	adapter->napi = kcalloc(adapter->req_rx_queues,
921 				sizeof(struct napi_struct), GFP_KERNEL);
922 	if (!adapter->napi)
923 		return -ENOMEM;
924 
925 	for (i = 0; i < adapter->req_rx_queues; i++) {
926 		netdev_dbg(netdev, "Adding napi[%d]\n", i);
927 		netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
928 			       NAPI_POLL_WEIGHT);
929 	}
930 
931 	send_map_query(adapter);
932 
933 	rc = init_rx_pools(netdev);
934 	if (rc)
935 		return rc;
936 
937 	rc = init_tx_pools(netdev);
938 	return rc;
939 }
940 
941 static int __ibmvnic_open(struct net_device *netdev)
942 {
943 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
944 	enum vnic_state prev_state = adapter->state;
945 	int i, rc;
946 
947 	adapter->state = VNIC_OPENING;
948 	replenish_pools(adapter);
949 	ibmvnic_napi_enable(adapter);
950 
951 	/* We're ready to receive frames, enable the sub-crq interrupts and
952 	 * set the logical link state to up
953 	 */
954 	for (i = 0; i < adapter->req_rx_queues; i++) {
955 		netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
956 		if (prev_state == VNIC_CLOSED)
957 			enable_irq(adapter->rx_scrq[i]->irq);
958 		else
959 			enable_scrq_irq(adapter, adapter->rx_scrq[i]);
960 	}
961 
962 	for (i = 0; i < adapter->req_tx_queues; i++) {
963 		netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
964 		if (prev_state == VNIC_CLOSED)
965 			enable_irq(adapter->tx_scrq[i]->irq);
966 		else
967 			enable_scrq_irq(adapter, adapter->tx_scrq[i]);
968 	}
969 
970 	rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
971 	if (rc) {
972 		for (i = 0; i < adapter->req_rx_queues; i++)
973 			napi_disable(&adapter->napi[i]);
974 		release_resources(adapter);
975 		return rc;
976 	}
977 
978 	netif_tx_start_all_queues(netdev);
979 
980 	if (prev_state == VNIC_CLOSED) {
981 		for (i = 0; i < adapter->req_rx_queues; i++)
982 			napi_schedule(&adapter->napi[i]);
983 	}
984 
985 	adapter->state = VNIC_OPEN;
986 	return rc;
987 }
988 
989 static int ibmvnic_open(struct net_device *netdev)
990 {
991 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
992 	int rc, vpd;
993 
994 	mutex_lock(&adapter->reset_lock);
995 
996 	if (adapter->mac_change_pending) {
997 		__ibmvnic_set_mac(netdev, &adapter->desired.mac);
998 		adapter->mac_change_pending = false;
999 	}
1000 
1001 	if (adapter->state != VNIC_CLOSED) {
1002 		rc = ibmvnic_login(netdev);
1003 		if (rc) {
1004 			mutex_unlock(&adapter->reset_lock);
1005 			return rc;
1006 		}
1007 
1008 		rc = init_resources(adapter);
1009 		if (rc) {
1010 			netdev_err(netdev, "failed to initialize resources\n");
1011 			release_resources(adapter);
1012 			mutex_unlock(&adapter->reset_lock);
1013 			return rc;
1014 		}
1015 	}
1016 
1017 	rc = __ibmvnic_open(netdev);
1018 	netif_carrier_on(netdev);
1019 
1020 	/* Vital Product Data (VPD) */
1021 	vpd = ibmvnic_get_vpd(adapter);
1022 	if (vpd)
1023 		netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1024 
1025 	mutex_unlock(&adapter->reset_lock);
1026 
1027 	return rc;
1028 }
1029 
1030 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1031 {
1032 	struct ibmvnic_tx_pool *tx_pool;
1033 	u64 tx_entries;
1034 	int tx_scrqs;
1035 	int i, j;
1036 
1037 	if (!adapter->tx_pool)
1038 		return;
1039 
1040 	tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1041 	tx_entries = adapter->req_tx_entries_per_subcrq;
1042 
1043 	/* Free any remaining skbs in the tx buffer pools */
1044 	for (i = 0; i < tx_scrqs; i++) {
1045 		tx_pool = &adapter->tx_pool[i];
1046 		if (!tx_pool)
1047 			continue;
1048 
1049 		netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1050 		for (j = 0; j < tx_entries; j++) {
1051 			if (tx_pool->tx_buff[j].skb) {
1052 				dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1053 				tx_pool->tx_buff[j].skb = NULL;
1054 			}
1055 		}
1056 	}
1057 }
1058 
1059 static int __ibmvnic_close(struct net_device *netdev)
1060 {
1061 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1062 	int rc = 0;
1063 	int i;
1064 
1065 	adapter->state = VNIC_CLOSING;
1066 
1067 	/* ensure that transmissions are stopped if called by do_reset */
1068 	if (adapter->resetting)
1069 		netif_tx_disable(netdev);
1070 	else
1071 		netif_tx_stop_all_queues(netdev);
1072 
1073 	ibmvnic_napi_disable(adapter);
1074 
1075 	if (adapter->tx_scrq) {
1076 		for (i = 0; i < adapter->req_tx_queues; i++)
1077 			if (adapter->tx_scrq[i]->irq) {
1078 				netdev_dbg(adapter->netdev,
1079 					   "Disabling tx_scrq[%d] irq\n", i);
1080 				disable_irq(adapter->tx_scrq[i]->irq);
1081 			}
1082 	}
1083 
1084 	rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1085 	if (rc)
1086 		return rc;
1087 
1088 	if (adapter->rx_scrq) {
1089 		for (i = 0; i < adapter->req_rx_queues; i++) {
1090 			int retries = 10;
1091 
1092 			while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1093 				retries--;
1094 				mdelay(100);
1095 
1096 				if (retries == 0)
1097 					break;
1098 			}
1099 
1100 			if (adapter->rx_scrq[i]->irq) {
1101 				netdev_dbg(adapter->netdev,
1102 					   "Disabling rx_scrq[%d] irq\n", i);
1103 				disable_irq(adapter->rx_scrq[i]->irq);
1104 			}
1105 		}
1106 	}
1107 
1108 	clean_tx_pools(adapter);
1109 	adapter->state = VNIC_CLOSED;
1110 	return rc;
1111 }
1112 
1113 static int ibmvnic_close(struct net_device *netdev)
1114 {
1115 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1116 	int rc;
1117 
1118 	mutex_lock(&adapter->reset_lock);
1119 	rc = __ibmvnic_close(netdev);
1120 	mutex_unlock(&adapter->reset_lock);
1121 
1122 	return rc;
1123 }
1124 
1125 /**
1126  * build_hdr_data - creates L2/L3/L4 header data buffer
1127  * @hdr_field - bitfield determining needed headers
1128  * @skb - socket buffer
1129  * @hdr_len - array of header lengths
1130  * @tot_len - total length of data
1131  *
1132  * Reads hdr_field to determine which headers are needed by firmware.
1133  * Builds a buffer containing these headers.  Saves individual header
1134  * lengths and total buffer length to be used to build descriptors.
1135  */
1136 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1137 			  int *hdr_len, u8 *hdr_data)
1138 {
1139 	int len = 0;
1140 	u8 *hdr;
1141 
1142 	hdr_len[0] = sizeof(struct ethhdr);
1143 
1144 	if (skb->protocol == htons(ETH_P_IP)) {
1145 		hdr_len[1] = ip_hdr(skb)->ihl * 4;
1146 		if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1147 			hdr_len[2] = tcp_hdrlen(skb);
1148 		else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1149 			hdr_len[2] = sizeof(struct udphdr);
1150 	} else if (skb->protocol == htons(ETH_P_IPV6)) {
1151 		hdr_len[1] = sizeof(struct ipv6hdr);
1152 		if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1153 			hdr_len[2] = tcp_hdrlen(skb);
1154 		else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1155 			hdr_len[2] = sizeof(struct udphdr);
1156 	}
1157 
1158 	memset(hdr_data, 0, 120);
1159 	if ((hdr_field >> 6) & 1) {
1160 		hdr = skb_mac_header(skb);
1161 		memcpy(hdr_data, hdr, hdr_len[0]);
1162 		len += hdr_len[0];
1163 	}
1164 
1165 	if ((hdr_field >> 5) & 1) {
1166 		hdr = skb_network_header(skb);
1167 		memcpy(hdr_data + len, hdr, hdr_len[1]);
1168 		len += hdr_len[1];
1169 	}
1170 
1171 	if ((hdr_field >> 4) & 1) {
1172 		hdr = skb_transport_header(skb);
1173 		memcpy(hdr_data + len, hdr, hdr_len[2]);
1174 		len += hdr_len[2];
1175 	}
1176 	return len;
1177 }
1178 
1179 /**
1180  * create_hdr_descs - create header and header extension descriptors
1181  * @hdr_field - bitfield determining needed headers
1182  * @data - buffer containing header data
1183  * @len - length of data buffer
1184  * @hdr_len - array of individual header lengths
1185  * @scrq_arr - descriptor array
1186  *
1187  * Creates header and, if needed, header extension descriptors and
1188  * places them in a descriptor array, scrq_arr
1189  */
1190 
1191 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1192 			    union sub_crq *scrq_arr)
1193 {
1194 	union sub_crq hdr_desc;
1195 	int tmp_len = len;
1196 	int num_descs = 0;
1197 	u8 *data, *cur;
1198 	int tmp;
1199 
1200 	while (tmp_len > 0) {
1201 		cur = hdr_data + len - tmp_len;
1202 
1203 		memset(&hdr_desc, 0, sizeof(hdr_desc));
1204 		if (cur != hdr_data) {
1205 			data = hdr_desc.hdr_ext.data;
1206 			tmp = tmp_len > 29 ? 29 : tmp_len;
1207 			hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1208 			hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1209 			hdr_desc.hdr_ext.len = tmp;
1210 		} else {
1211 			data = hdr_desc.hdr.data;
1212 			tmp = tmp_len > 24 ? 24 : tmp_len;
1213 			hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1214 			hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1215 			hdr_desc.hdr.len = tmp;
1216 			hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1217 			hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1218 			hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1219 			hdr_desc.hdr.flag = hdr_field << 1;
1220 		}
1221 		memcpy(data, cur, tmp);
1222 		tmp_len -= tmp;
1223 		*scrq_arr = hdr_desc;
1224 		scrq_arr++;
1225 		num_descs++;
1226 	}
1227 
1228 	return num_descs;
1229 }
1230 
1231 /**
1232  * build_hdr_descs_arr - build a header descriptor array
1233  * @skb - socket buffer
1234  * @num_entries - number of descriptors to be sent
1235  * @subcrq - first TX descriptor
1236  * @hdr_field - bit field determining which headers will be sent
1237  *
1238  * This function will build a TX descriptor array with applicable
1239  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1240  */
1241 
1242 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1243 				int *num_entries, u8 hdr_field)
1244 {
1245 	int hdr_len[3] = {0, 0, 0};
1246 	int tot_len;
1247 	u8 *hdr_data = txbuff->hdr_data;
1248 
1249 	tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1250 				 txbuff->hdr_data);
1251 	*num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1252 			 txbuff->indir_arr + 1);
1253 }
1254 
1255 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1256 {
1257 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1258 	int queue_num = skb_get_queue_mapping(skb);
1259 	u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1260 	struct device *dev = &adapter->vdev->dev;
1261 	struct ibmvnic_tx_buff *tx_buff = NULL;
1262 	struct ibmvnic_sub_crq_queue *tx_scrq;
1263 	struct ibmvnic_tx_pool *tx_pool;
1264 	unsigned int tx_send_failed = 0;
1265 	unsigned int tx_map_failed = 0;
1266 	unsigned int tx_dropped = 0;
1267 	unsigned int tx_packets = 0;
1268 	unsigned int tx_bytes = 0;
1269 	dma_addr_t data_dma_addr;
1270 	struct netdev_queue *txq;
1271 	unsigned long lpar_rc;
1272 	union sub_crq tx_crq;
1273 	unsigned int offset;
1274 	int num_entries = 1;
1275 	unsigned char *dst;
1276 	u64 *handle_array;
1277 	int index = 0;
1278 	int ret = 0;
1279 
1280 	if (adapter->resetting) {
1281 		if (!netif_subqueue_stopped(netdev, skb))
1282 			netif_stop_subqueue(netdev, queue_num);
1283 		dev_kfree_skb_any(skb);
1284 
1285 		tx_send_failed++;
1286 		tx_dropped++;
1287 		ret = NETDEV_TX_OK;
1288 		goto out;
1289 	}
1290 
1291 	tx_pool = &adapter->tx_pool[queue_num];
1292 	tx_scrq = adapter->tx_scrq[queue_num];
1293 	txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1294 	handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1295 		be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1296 
1297 	index = tx_pool->free_map[tx_pool->consumer_index];
1298 
1299 	if (skb_is_gso(skb)) {
1300 		offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1301 		dst = tx_pool->tso_ltb.buff + offset;
1302 		memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1303 		data_dma_addr = tx_pool->tso_ltb.addr + offset;
1304 		tx_pool->tso_index++;
1305 		if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1306 			tx_pool->tso_index = 0;
1307 	} else {
1308 		offset = index * adapter->req_mtu;
1309 		dst = tx_pool->long_term_buff.buff + offset;
1310 		memset(dst, 0, adapter->req_mtu);
1311 		data_dma_addr = tx_pool->long_term_buff.addr + offset;
1312 	}
1313 
1314 	if (skb_shinfo(skb)->nr_frags) {
1315 		int cur, i;
1316 
1317 		/* Copy the head */
1318 		skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1319 		cur = skb_headlen(skb);
1320 
1321 		/* Copy the frags */
1322 		for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1323 			const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1324 
1325 			memcpy(dst + cur,
1326 			       page_address(skb_frag_page(frag)) +
1327 			       frag->page_offset, skb_frag_size(frag));
1328 			cur += skb_frag_size(frag);
1329 		}
1330 	} else {
1331 		skb_copy_from_linear_data(skb, dst, skb->len);
1332 	}
1333 
1334 	tx_pool->consumer_index =
1335 	    (tx_pool->consumer_index + 1) %
1336 		adapter->req_tx_entries_per_subcrq;
1337 
1338 	tx_buff = &tx_pool->tx_buff[index];
1339 	tx_buff->skb = skb;
1340 	tx_buff->data_dma[0] = data_dma_addr;
1341 	tx_buff->data_len[0] = skb->len;
1342 	tx_buff->index = index;
1343 	tx_buff->pool_index = queue_num;
1344 	tx_buff->last_frag = true;
1345 
1346 	memset(&tx_crq, 0, sizeof(tx_crq));
1347 	tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1348 	tx_crq.v1.type = IBMVNIC_TX_DESC;
1349 	tx_crq.v1.n_crq_elem = 1;
1350 	tx_crq.v1.n_sge = 1;
1351 	tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1352 	tx_crq.v1.correlator = cpu_to_be32(index);
1353 	if (skb_is_gso(skb))
1354 		tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1355 	else
1356 		tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1357 	tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1358 	tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1359 
1360 	if (adapter->vlan_header_insertion) {
1361 		tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1362 		tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1363 	}
1364 
1365 	if (skb->protocol == htons(ETH_P_IP)) {
1366 		if (ip_hdr(skb)->version == 4)
1367 			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1368 		else if (ip_hdr(skb)->version == 6)
1369 			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1370 
1371 		if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1372 			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1373 		else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1374 			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1375 	}
1376 
1377 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
1378 		tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1379 		hdrs += 2;
1380 	}
1381 	if (skb_is_gso(skb)) {
1382 		tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1383 		tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1384 		hdrs += 2;
1385 	}
1386 	/* determine if l2/3/4 headers are sent to firmware */
1387 	if ((*hdrs >> 7) & 1 &&
1388 	    (skb->protocol == htons(ETH_P_IP) ||
1389 	     skb->protocol == htons(ETH_P_IPV6))) {
1390 		build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1391 		tx_crq.v1.n_crq_elem = num_entries;
1392 		tx_buff->indir_arr[0] = tx_crq;
1393 		tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1394 						    sizeof(tx_buff->indir_arr),
1395 						    DMA_TO_DEVICE);
1396 		if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1397 			dev_kfree_skb_any(skb);
1398 			tx_buff->skb = NULL;
1399 			if (!firmware_has_feature(FW_FEATURE_CMO))
1400 				dev_err(dev, "tx: unable to map descriptor array\n");
1401 			tx_map_failed++;
1402 			tx_dropped++;
1403 			ret = NETDEV_TX_OK;
1404 			goto out;
1405 		}
1406 		lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1407 					       (u64)tx_buff->indir_dma,
1408 					       (u64)num_entries);
1409 	} else {
1410 		lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1411 				      &tx_crq);
1412 	}
1413 	if (lpar_rc != H_SUCCESS) {
1414 		dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1415 
1416 		if (tx_pool->consumer_index == 0)
1417 			tx_pool->consumer_index =
1418 				adapter->req_tx_entries_per_subcrq - 1;
1419 		else
1420 			tx_pool->consumer_index--;
1421 
1422 		dev_kfree_skb_any(skb);
1423 		tx_buff->skb = NULL;
1424 
1425 		if (lpar_rc == H_CLOSED) {
1426 			/* Disable TX and report carrier off if queue is closed.
1427 			 * Firmware guarantees that a signal will be sent to the
1428 			 * driver, triggering a reset or some other action.
1429 			 */
1430 			netif_tx_stop_all_queues(netdev);
1431 			netif_carrier_off(netdev);
1432 		}
1433 
1434 		tx_send_failed++;
1435 		tx_dropped++;
1436 		ret = NETDEV_TX_OK;
1437 		goto out;
1438 	}
1439 
1440 	if (atomic_inc_return(&tx_scrq->used)
1441 					>= adapter->req_tx_entries_per_subcrq) {
1442 		netdev_info(netdev, "Stopping queue %d\n", queue_num);
1443 		netif_stop_subqueue(netdev, queue_num);
1444 	}
1445 
1446 	tx_packets++;
1447 	tx_bytes += skb->len;
1448 	txq->trans_start = jiffies;
1449 	ret = NETDEV_TX_OK;
1450 
1451 out:
1452 	netdev->stats.tx_dropped += tx_dropped;
1453 	netdev->stats.tx_bytes += tx_bytes;
1454 	netdev->stats.tx_packets += tx_packets;
1455 	adapter->tx_send_failed += tx_send_failed;
1456 	adapter->tx_map_failed += tx_map_failed;
1457 	adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1458 	adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1459 	adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1460 
1461 	return ret;
1462 }
1463 
1464 static void ibmvnic_set_multi(struct net_device *netdev)
1465 {
1466 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1467 	struct netdev_hw_addr *ha;
1468 	union ibmvnic_crq crq;
1469 
1470 	memset(&crq, 0, sizeof(crq));
1471 	crq.request_capability.first = IBMVNIC_CRQ_CMD;
1472 	crq.request_capability.cmd = REQUEST_CAPABILITY;
1473 
1474 	if (netdev->flags & IFF_PROMISC) {
1475 		if (!adapter->promisc_supported)
1476 			return;
1477 	} else {
1478 		if (netdev->flags & IFF_ALLMULTI) {
1479 			/* Accept all multicast */
1480 			memset(&crq, 0, sizeof(crq));
1481 			crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1482 			crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1483 			crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1484 			ibmvnic_send_crq(adapter, &crq);
1485 		} else if (netdev_mc_empty(netdev)) {
1486 			/* Reject all multicast */
1487 			memset(&crq, 0, sizeof(crq));
1488 			crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1489 			crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1490 			crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1491 			ibmvnic_send_crq(adapter, &crq);
1492 		} else {
1493 			/* Accept one or more multicast(s) */
1494 			netdev_for_each_mc_addr(ha, netdev) {
1495 				memset(&crq, 0, sizeof(crq));
1496 				crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1497 				crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1498 				crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1499 				ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1500 						ha->addr);
1501 				ibmvnic_send_crq(adapter, &crq);
1502 			}
1503 		}
1504 	}
1505 }
1506 
1507 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1508 {
1509 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1510 	struct sockaddr *addr = p;
1511 	union ibmvnic_crq crq;
1512 
1513 	if (!is_valid_ether_addr(addr->sa_data))
1514 		return -EADDRNOTAVAIL;
1515 
1516 	memset(&crq, 0, sizeof(crq));
1517 	crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1518 	crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1519 	ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1520 	ibmvnic_send_crq(adapter, &crq);
1521 	/* netdev->dev_addr is changed in handle_change_mac_rsp function */
1522 	return 0;
1523 }
1524 
1525 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1526 {
1527 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1528 	struct sockaddr *addr = p;
1529 
1530 	if (adapter->state != VNIC_OPEN) {
1531 		memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1532 		adapter->mac_change_pending = true;
1533 		return 0;
1534 	}
1535 
1536 	__ibmvnic_set_mac(netdev, addr);
1537 
1538 	return 0;
1539 }
1540 
1541 /**
1542  * do_reset returns zero if we are able to keep processing reset events, or
1543  * non-zero if we hit a fatal error and must halt.
1544  */
1545 static int do_reset(struct ibmvnic_adapter *adapter,
1546 		    struct ibmvnic_rwi *rwi, u32 reset_state)
1547 {
1548 	struct net_device *netdev = adapter->netdev;
1549 	int i, rc;
1550 
1551 	netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1552 		   rwi->reset_reason);
1553 
1554 	netif_carrier_off(netdev);
1555 	adapter->reset_reason = rwi->reset_reason;
1556 
1557 	if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1558 		rc = ibmvnic_reenable_crq_queue(adapter);
1559 		if (rc)
1560 			return 0;
1561 	}
1562 
1563 	rc = __ibmvnic_close(netdev);
1564 	if (rc)
1565 		return rc;
1566 
1567 	if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1568 	    adapter->wait_for_reset) {
1569 		release_resources(adapter);
1570 		release_sub_crqs(adapter);
1571 		release_crq_queue(adapter);
1572 	}
1573 
1574 	if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1575 		/* remove the closed state so when we call open it appears
1576 		 * we are coming from the probed state.
1577 		 */
1578 		adapter->state = VNIC_PROBED;
1579 
1580 		rc = ibmvnic_init(adapter);
1581 		if (rc)
1582 			return IBMVNIC_INIT_FAILED;
1583 
1584 		/* If the adapter was in PROBE state prior to the reset,
1585 		 * exit here.
1586 		 */
1587 		if (reset_state == VNIC_PROBED)
1588 			return 0;
1589 
1590 		rc = ibmvnic_login(netdev);
1591 		if (rc) {
1592 			adapter->state = VNIC_PROBED;
1593 			return 0;
1594 		}
1595 
1596 		if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1597 		    adapter->wait_for_reset) {
1598 			rc = init_resources(adapter);
1599 			if (rc)
1600 				return rc;
1601 		} else {
1602 			rc = reset_tx_pools(adapter);
1603 			if (rc)
1604 				return rc;
1605 
1606 			rc = reset_rx_pools(adapter);
1607 			if (rc)
1608 				return rc;
1609 
1610 			if (reset_state == VNIC_CLOSED)
1611 				return 0;
1612 		}
1613 	}
1614 
1615 	rc = __ibmvnic_open(netdev);
1616 	if (rc) {
1617 		if (list_empty(&adapter->rwi_list))
1618 			adapter->state = VNIC_CLOSED;
1619 		else
1620 			adapter->state = reset_state;
1621 
1622 		return 0;
1623 	}
1624 
1625 	netif_carrier_on(netdev);
1626 
1627 	/* kick napi */
1628 	for (i = 0; i < adapter->req_rx_queues; i++)
1629 		napi_schedule(&adapter->napi[i]);
1630 
1631 	if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1632 		netdev_notify_peers(netdev);
1633 
1634 	return 0;
1635 }
1636 
1637 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1638 {
1639 	struct ibmvnic_rwi *rwi;
1640 
1641 	mutex_lock(&adapter->rwi_lock);
1642 
1643 	if (!list_empty(&adapter->rwi_list)) {
1644 		rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1645 				       list);
1646 		list_del(&rwi->list);
1647 	} else {
1648 		rwi = NULL;
1649 	}
1650 
1651 	mutex_unlock(&adapter->rwi_lock);
1652 	return rwi;
1653 }
1654 
1655 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1656 {
1657 	struct ibmvnic_rwi *rwi;
1658 
1659 	rwi = get_next_rwi(adapter);
1660 	while (rwi) {
1661 		kfree(rwi);
1662 		rwi = get_next_rwi(adapter);
1663 	}
1664 }
1665 
1666 static void __ibmvnic_reset(struct work_struct *work)
1667 {
1668 	struct ibmvnic_rwi *rwi;
1669 	struct ibmvnic_adapter *adapter;
1670 	struct net_device *netdev;
1671 	u32 reset_state;
1672 	int rc = 0;
1673 
1674 	adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1675 	netdev = adapter->netdev;
1676 
1677 	mutex_lock(&adapter->reset_lock);
1678 	adapter->resetting = true;
1679 	reset_state = adapter->state;
1680 
1681 	rwi = get_next_rwi(adapter);
1682 	while (rwi) {
1683 		rc = do_reset(adapter, rwi, reset_state);
1684 		kfree(rwi);
1685 		if (rc && rc != IBMVNIC_INIT_FAILED)
1686 			break;
1687 
1688 		rwi = get_next_rwi(adapter);
1689 	}
1690 
1691 	if (adapter->wait_for_reset) {
1692 		adapter->wait_for_reset = false;
1693 		adapter->reset_done_rc = rc;
1694 		complete(&adapter->reset_done);
1695 	}
1696 
1697 	if (rc) {
1698 		netdev_dbg(adapter->netdev, "Reset failed\n");
1699 		free_all_rwi(adapter);
1700 		mutex_unlock(&adapter->reset_lock);
1701 		return;
1702 	}
1703 
1704 	adapter->resetting = false;
1705 	mutex_unlock(&adapter->reset_lock);
1706 }
1707 
1708 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1709 			  enum ibmvnic_reset_reason reason)
1710 {
1711 	struct ibmvnic_rwi *rwi, *tmp;
1712 	struct net_device *netdev = adapter->netdev;
1713 	struct list_head *entry;
1714 
1715 	if (adapter->state == VNIC_REMOVING ||
1716 	    adapter->state == VNIC_REMOVED) {
1717 		netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1718 		return;
1719 	}
1720 
1721 	if (adapter->state == VNIC_PROBING) {
1722 		netdev_warn(netdev, "Adapter reset during probe\n");
1723 		adapter->init_done_rc = EAGAIN;
1724 		return;
1725 	}
1726 
1727 	mutex_lock(&adapter->rwi_lock);
1728 
1729 	list_for_each(entry, &adapter->rwi_list) {
1730 		tmp = list_entry(entry, struct ibmvnic_rwi, list);
1731 		if (tmp->reset_reason == reason) {
1732 			netdev_dbg(netdev, "Skipping matching reset\n");
1733 			mutex_unlock(&adapter->rwi_lock);
1734 			return;
1735 		}
1736 	}
1737 
1738 	rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1739 	if (!rwi) {
1740 		mutex_unlock(&adapter->rwi_lock);
1741 		ibmvnic_close(netdev);
1742 		return;
1743 	}
1744 
1745 	rwi->reset_reason = reason;
1746 	list_add_tail(&rwi->list, &adapter->rwi_list);
1747 	mutex_unlock(&adapter->rwi_lock);
1748 
1749 	netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1750 	schedule_work(&adapter->ibmvnic_reset);
1751 }
1752 
1753 static void ibmvnic_tx_timeout(struct net_device *dev)
1754 {
1755 	struct ibmvnic_adapter *adapter = netdev_priv(dev);
1756 
1757 	ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1758 }
1759 
1760 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1761 				  struct ibmvnic_rx_buff *rx_buff)
1762 {
1763 	struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1764 
1765 	rx_buff->skb = NULL;
1766 
1767 	pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1768 	pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1769 
1770 	atomic_dec(&pool->available);
1771 }
1772 
1773 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1774 {
1775 	struct net_device *netdev = napi->dev;
1776 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1777 	int scrq_num = (int)(napi - adapter->napi);
1778 	int frames_processed = 0;
1779 
1780 restart_poll:
1781 	while (frames_processed < budget) {
1782 		struct sk_buff *skb;
1783 		struct ibmvnic_rx_buff *rx_buff;
1784 		union sub_crq *next;
1785 		u32 length;
1786 		u16 offset;
1787 		u8 flags = 0;
1788 
1789 		if (unlikely(adapter->resetting)) {
1790 			enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1791 			napi_complete_done(napi, frames_processed);
1792 			return frames_processed;
1793 		}
1794 
1795 		if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1796 			break;
1797 		next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1798 		rx_buff =
1799 		    (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1800 							  rx_comp.correlator);
1801 		/* do error checking */
1802 		if (next->rx_comp.rc) {
1803 			netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1804 				   be16_to_cpu(next->rx_comp.rc));
1805 			/* free the entry */
1806 			next->rx_comp.first = 0;
1807 			remove_buff_from_pool(adapter, rx_buff);
1808 			continue;
1809 		}
1810 
1811 		length = be32_to_cpu(next->rx_comp.len);
1812 		offset = be16_to_cpu(next->rx_comp.off_frame_data);
1813 		flags = next->rx_comp.flags;
1814 		skb = rx_buff->skb;
1815 		skb_copy_to_linear_data(skb, rx_buff->data + offset,
1816 					length);
1817 
1818 		/* VLAN Header has been stripped by the system firmware and
1819 		 * needs to be inserted by the driver
1820 		 */
1821 		if (adapter->rx_vlan_header_insertion &&
1822 		    (flags & IBMVNIC_VLAN_STRIPPED))
1823 			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1824 					       ntohs(next->rx_comp.vlan_tci));
1825 
1826 		/* free the entry */
1827 		next->rx_comp.first = 0;
1828 		remove_buff_from_pool(adapter, rx_buff);
1829 
1830 		skb_put(skb, length);
1831 		skb->protocol = eth_type_trans(skb, netdev);
1832 		skb_record_rx_queue(skb, scrq_num);
1833 
1834 		if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1835 		    flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1836 			skb->ip_summed = CHECKSUM_UNNECESSARY;
1837 		}
1838 
1839 		length = skb->len;
1840 		napi_gro_receive(napi, skb); /* send it up */
1841 		netdev->stats.rx_packets++;
1842 		netdev->stats.rx_bytes += length;
1843 		adapter->rx_stats_buffers[scrq_num].packets++;
1844 		adapter->rx_stats_buffers[scrq_num].bytes += length;
1845 		frames_processed++;
1846 	}
1847 
1848 	if (adapter->state != VNIC_CLOSING)
1849 		replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1850 
1851 	if (frames_processed < budget) {
1852 		enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1853 		napi_complete_done(napi, frames_processed);
1854 		if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1855 		    napi_reschedule(napi)) {
1856 			disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1857 			goto restart_poll;
1858 		}
1859 	}
1860 	return frames_processed;
1861 }
1862 
1863 #ifdef CONFIG_NET_POLL_CONTROLLER
1864 static void ibmvnic_netpoll_controller(struct net_device *dev)
1865 {
1866 	struct ibmvnic_adapter *adapter = netdev_priv(dev);
1867 	int i;
1868 
1869 	replenish_pools(netdev_priv(dev));
1870 	for (i = 0; i < adapter->req_rx_queues; i++)
1871 		ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1872 				     adapter->rx_scrq[i]);
1873 }
1874 #endif
1875 
1876 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1877 {
1878 	adapter->fallback.mtu = adapter->req_mtu;
1879 	adapter->fallback.rx_queues = adapter->req_rx_queues;
1880 	adapter->fallback.tx_queues = adapter->req_tx_queues;
1881 	adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1882 	adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1883 
1884 	init_completion(&adapter->reset_done);
1885 	ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1886 	adapter->wait_for_reset = true;
1887 	wait_for_completion(&adapter->reset_done);
1888 
1889 	if (adapter->reset_done_rc) {
1890 		adapter->desired.mtu = adapter->fallback.mtu;
1891 		adapter->desired.rx_queues = adapter->fallback.rx_queues;
1892 		adapter->desired.tx_queues = adapter->fallback.tx_queues;
1893 		adapter->desired.rx_entries = adapter->fallback.rx_entries;
1894 		adapter->desired.tx_entries = adapter->fallback.tx_entries;
1895 
1896 		init_completion(&adapter->reset_done);
1897 		ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1898 		wait_for_completion(&adapter->reset_done);
1899 	}
1900 	adapter->wait_for_reset = false;
1901 
1902 	return adapter->reset_done_rc;
1903 }
1904 
1905 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1906 {
1907 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1908 
1909 	adapter->desired.mtu = new_mtu + ETH_HLEN;
1910 
1911 	return wait_for_reset(adapter);
1912 }
1913 
1914 static const struct net_device_ops ibmvnic_netdev_ops = {
1915 	.ndo_open		= ibmvnic_open,
1916 	.ndo_stop		= ibmvnic_close,
1917 	.ndo_start_xmit		= ibmvnic_xmit,
1918 	.ndo_set_rx_mode	= ibmvnic_set_multi,
1919 	.ndo_set_mac_address	= ibmvnic_set_mac,
1920 	.ndo_validate_addr	= eth_validate_addr,
1921 	.ndo_tx_timeout		= ibmvnic_tx_timeout,
1922 #ifdef CONFIG_NET_POLL_CONTROLLER
1923 	.ndo_poll_controller	= ibmvnic_netpoll_controller,
1924 #endif
1925 	.ndo_change_mtu		= ibmvnic_change_mtu,
1926 };
1927 
1928 /* ethtool functions */
1929 
1930 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1931 				      struct ethtool_link_ksettings *cmd)
1932 {
1933 	u32 supported, advertising;
1934 
1935 	supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1936 			  SUPPORTED_FIBRE);
1937 	advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1938 			    ADVERTISED_FIBRE);
1939 	cmd->base.speed = SPEED_1000;
1940 	cmd->base.duplex = DUPLEX_FULL;
1941 	cmd->base.port = PORT_FIBRE;
1942 	cmd->base.phy_address = 0;
1943 	cmd->base.autoneg = AUTONEG_ENABLE;
1944 
1945 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1946 						supported);
1947 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1948 						advertising);
1949 
1950 	return 0;
1951 }
1952 
1953 static void ibmvnic_get_drvinfo(struct net_device *netdev,
1954 				struct ethtool_drvinfo *info)
1955 {
1956 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1957 
1958 	strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1959 	strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1960 	strlcpy(info->fw_version, adapter->fw_version,
1961 		sizeof(info->fw_version));
1962 }
1963 
1964 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1965 {
1966 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1967 
1968 	return adapter->msg_enable;
1969 }
1970 
1971 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1972 {
1973 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1974 
1975 	adapter->msg_enable = data;
1976 }
1977 
1978 static u32 ibmvnic_get_link(struct net_device *netdev)
1979 {
1980 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1981 
1982 	/* Don't need to send a query because we request a logical link up at
1983 	 * init and then we wait for link state indications
1984 	 */
1985 	return adapter->logical_link_state;
1986 }
1987 
1988 static void ibmvnic_get_ringparam(struct net_device *netdev,
1989 				  struct ethtool_ringparam *ring)
1990 {
1991 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1992 
1993 	ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
1994 	ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
1995 	ring->rx_mini_max_pending = 0;
1996 	ring->rx_jumbo_max_pending = 0;
1997 	ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
1998 	ring->tx_pending = adapter->req_tx_entries_per_subcrq;
1999 	ring->rx_mini_pending = 0;
2000 	ring->rx_jumbo_pending = 0;
2001 }
2002 
2003 static int ibmvnic_set_ringparam(struct net_device *netdev,
2004 				 struct ethtool_ringparam *ring)
2005 {
2006 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2007 
2008 	if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2009 	    ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2010 		netdev_err(netdev, "Invalid request.\n");
2011 		netdev_err(netdev, "Max tx buffers = %llu\n",
2012 			   adapter->max_rx_add_entries_per_subcrq);
2013 		netdev_err(netdev, "Max rx buffers = %llu\n",
2014 			   adapter->max_tx_entries_per_subcrq);
2015 		return -EINVAL;
2016 	}
2017 
2018 	adapter->desired.rx_entries = ring->rx_pending;
2019 	adapter->desired.tx_entries = ring->tx_pending;
2020 
2021 	return wait_for_reset(adapter);
2022 }
2023 
2024 static void ibmvnic_get_channels(struct net_device *netdev,
2025 				 struct ethtool_channels *channels)
2026 {
2027 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2028 
2029 	channels->max_rx = adapter->max_rx_queues;
2030 	channels->max_tx = adapter->max_tx_queues;
2031 	channels->max_other = 0;
2032 	channels->max_combined = 0;
2033 	channels->rx_count = adapter->req_rx_queues;
2034 	channels->tx_count = adapter->req_tx_queues;
2035 	channels->other_count = 0;
2036 	channels->combined_count = 0;
2037 }
2038 
2039 static int ibmvnic_set_channels(struct net_device *netdev,
2040 				struct ethtool_channels *channels)
2041 {
2042 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2043 
2044 	adapter->desired.rx_queues = channels->rx_count;
2045 	adapter->desired.tx_queues = channels->tx_count;
2046 
2047 	return wait_for_reset(adapter);
2048 }
2049 
2050 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2051 {
2052 	struct ibmvnic_adapter *adapter = netdev_priv(dev);
2053 	int i;
2054 
2055 	if (stringset != ETH_SS_STATS)
2056 		return;
2057 
2058 	for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2059 		memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2060 
2061 	for (i = 0; i < adapter->req_tx_queues; i++) {
2062 		snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2063 		data += ETH_GSTRING_LEN;
2064 
2065 		snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2066 		data += ETH_GSTRING_LEN;
2067 
2068 		snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2069 		data += ETH_GSTRING_LEN;
2070 	}
2071 
2072 	for (i = 0; i < adapter->req_rx_queues; i++) {
2073 		snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2074 		data += ETH_GSTRING_LEN;
2075 
2076 		snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2077 		data += ETH_GSTRING_LEN;
2078 
2079 		snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2080 		data += ETH_GSTRING_LEN;
2081 	}
2082 }
2083 
2084 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2085 {
2086 	struct ibmvnic_adapter *adapter = netdev_priv(dev);
2087 
2088 	switch (sset) {
2089 	case ETH_SS_STATS:
2090 		return ARRAY_SIZE(ibmvnic_stats) +
2091 		       adapter->req_tx_queues * NUM_TX_STATS +
2092 		       adapter->req_rx_queues * NUM_RX_STATS;
2093 	default:
2094 		return -EOPNOTSUPP;
2095 	}
2096 }
2097 
2098 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2099 				      struct ethtool_stats *stats, u64 *data)
2100 {
2101 	struct ibmvnic_adapter *adapter = netdev_priv(dev);
2102 	union ibmvnic_crq crq;
2103 	int i, j;
2104 
2105 	memset(&crq, 0, sizeof(crq));
2106 	crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2107 	crq.request_statistics.cmd = REQUEST_STATISTICS;
2108 	crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2109 	crq.request_statistics.len =
2110 	    cpu_to_be32(sizeof(struct ibmvnic_statistics));
2111 
2112 	/* Wait for data to be written */
2113 	init_completion(&adapter->stats_done);
2114 	ibmvnic_send_crq(adapter, &crq);
2115 	wait_for_completion(&adapter->stats_done);
2116 
2117 	for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2118 		data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2119 						ibmvnic_stats[i].offset));
2120 
2121 	for (j = 0; j < adapter->req_tx_queues; j++) {
2122 		data[i] = adapter->tx_stats_buffers[j].packets;
2123 		i++;
2124 		data[i] = adapter->tx_stats_buffers[j].bytes;
2125 		i++;
2126 		data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2127 		i++;
2128 	}
2129 
2130 	for (j = 0; j < adapter->req_rx_queues; j++) {
2131 		data[i] = adapter->rx_stats_buffers[j].packets;
2132 		i++;
2133 		data[i] = adapter->rx_stats_buffers[j].bytes;
2134 		i++;
2135 		data[i] = adapter->rx_stats_buffers[j].interrupts;
2136 		i++;
2137 	}
2138 }
2139 
2140 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2141 	.get_drvinfo		= ibmvnic_get_drvinfo,
2142 	.get_msglevel		= ibmvnic_get_msglevel,
2143 	.set_msglevel		= ibmvnic_set_msglevel,
2144 	.get_link		= ibmvnic_get_link,
2145 	.get_ringparam		= ibmvnic_get_ringparam,
2146 	.set_ringparam		= ibmvnic_set_ringparam,
2147 	.get_channels		= ibmvnic_get_channels,
2148 	.set_channels		= ibmvnic_set_channels,
2149 	.get_strings            = ibmvnic_get_strings,
2150 	.get_sset_count         = ibmvnic_get_sset_count,
2151 	.get_ethtool_stats	= ibmvnic_get_ethtool_stats,
2152 	.get_link_ksettings	= ibmvnic_get_link_ksettings,
2153 };
2154 
2155 /* Routines for managing CRQs/sCRQs  */
2156 
2157 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2158 				   struct ibmvnic_sub_crq_queue *scrq)
2159 {
2160 	int rc;
2161 
2162 	if (scrq->irq) {
2163 		free_irq(scrq->irq, scrq);
2164 		irq_dispose_mapping(scrq->irq);
2165 		scrq->irq = 0;
2166 	}
2167 
2168 	memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2169 	scrq->cur = 0;
2170 
2171 	rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2172 			   4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2173 	return rc;
2174 }
2175 
2176 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2177 {
2178 	int i, rc;
2179 
2180 	for (i = 0; i < adapter->req_tx_queues; i++) {
2181 		netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2182 		rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2183 		if (rc)
2184 			return rc;
2185 	}
2186 
2187 	for (i = 0; i < adapter->req_rx_queues; i++) {
2188 		netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2189 		rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2190 		if (rc)
2191 			return rc;
2192 	}
2193 
2194 	return rc;
2195 }
2196 
2197 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2198 				  struct ibmvnic_sub_crq_queue *scrq)
2199 {
2200 	struct device *dev = &adapter->vdev->dev;
2201 	long rc;
2202 
2203 	netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2204 
2205 	/* Close the sub-crqs */
2206 	do {
2207 		rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2208 					adapter->vdev->unit_address,
2209 					scrq->crq_num);
2210 	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2211 
2212 	if (rc) {
2213 		netdev_err(adapter->netdev,
2214 			   "Failed to release sub-CRQ %16lx, rc = %ld\n",
2215 			   scrq->crq_num, rc);
2216 	}
2217 
2218 	dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2219 			 DMA_BIDIRECTIONAL);
2220 	free_pages((unsigned long)scrq->msgs, 2);
2221 	kfree(scrq);
2222 }
2223 
2224 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2225 							*adapter)
2226 {
2227 	struct device *dev = &adapter->vdev->dev;
2228 	struct ibmvnic_sub_crq_queue *scrq;
2229 	int rc;
2230 
2231 	scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2232 	if (!scrq)
2233 		return NULL;
2234 
2235 	scrq->msgs =
2236 		(union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2237 	if (!scrq->msgs) {
2238 		dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2239 		goto zero_page_failed;
2240 	}
2241 
2242 	scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2243 					 DMA_BIDIRECTIONAL);
2244 	if (dma_mapping_error(dev, scrq->msg_token)) {
2245 		dev_warn(dev, "Couldn't map crq queue messages page\n");
2246 		goto map_failed;
2247 	}
2248 
2249 	rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2250 			   4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2251 
2252 	if (rc == H_RESOURCE)
2253 		rc = ibmvnic_reset_crq(adapter);
2254 
2255 	if (rc == H_CLOSED) {
2256 		dev_warn(dev, "Partner adapter not ready, waiting.\n");
2257 	} else if (rc) {
2258 		dev_warn(dev, "Error %d registering sub-crq\n", rc);
2259 		goto reg_failed;
2260 	}
2261 
2262 	scrq->adapter = adapter;
2263 	scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2264 	spin_lock_init(&scrq->lock);
2265 
2266 	netdev_dbg(adapter->netdev,
2267 		   "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2268 		   scrq->crq_num, scrq->hw_irq, scrq->irq);
2269 
2270 	return scrq;
2271 
2272 reg_failed:
2273 	dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2274 			 DMA_BIDIRECTIONAL);
2275 map_failed:
2276 	free_pages((unsigned long)scrq->msgs, 2);
2277 zero_page_failed:
2278 	kfree(scrq);
2279 
2280 	return NULL;
2281 }
2282 
2283 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2284 {
2285 	int i;
2286 
2287 	if (adapter->tx_scrq) {
2288 		for (i = 0; i < adapter->req_tx_queues; i++) {
2289 			if (!adapter->tx_scrq[i])
2290 				continue;
2291 
2292 			netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2293 				   i);
2294 			if (adapter->tx_scrq[i]->irq) {
2295 				free_irq(adapter->tx_scrq[i]->irq,
2296 					 adapter->tx_scrq[i]);
2297 				irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2298 				adapter->tx_scrq[i]->irq = 0;
2299 			}
2300 
2301 			release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2302 		}
2303 
2304 		kfree(adapter->tx_scrq);
2305 		adapter->tx_scrq = NULL;
2306 	}
2307 
2308 	if (adapter->rx_scrq) {
2309 		for (i = 0; i < adapter->req_rx_queues; i++) {
2310 			if (!adapter->rx_scrq[i])
2311 				continue;
2312 
2313 			netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2314 				   i);
2315 			if (adapter->rx_scrq[i]->irq) {
2316 				free_irq(adapter->rx_scrq[i]->irq,
2317 					 adapter->rx_scrq[i]);
2318 				irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2319 				adapter->rx_scrq[i]->irq = 0;
2320 			}
2321 
2322 			release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2323 		}
2324 
2325 		kfree(adapter->rx_scrq);
2326 		adapter->rx_scrq = NULL;
2327 	}
2328 }
2329 
2330 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2331 			    struct ibmvnic_sub_crq_queue *scrq)
2332 {
2333 	struct device *dev = &adapter->vdev->dev;
2334 	unsigned long rc;
2335 
2336 	rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2337 				H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2338 	if (rc)
2339 		dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2340 			scrq->hw_irq, rc);
2341 	return rc;
2342 }
2343 
2344 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2345 			   struct ibmvnic_sub_crq_queue *scrq)
2346 {
2347 	struct device *dev = &adapter->vdev->dev;
2348 	unsigned long rc;
2349 
2350 	if (scrq->hw_irq > 0x100000000ULL) {
2351 		dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2352 		return 1;
2353 	}
2354 
2355 	rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2356 				H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2357 	if (rc)
2358 		dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2359 			scrq->hw_irq, rc);
2360 	return rc;
2361 }
2362 
2363 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2364 			       struct ibmvnic_sub_crq_queue *scrq)
2365 {
2366 	struct device *dev = &adapter->vdev->dev;
2367 	struct ibmvnic_tx_buff *txbuff;
2368 	union sub_crq *next;
2369 	int index;
2370 	int i, j;
2371 	u8 first;
2372 
2373 restart_loop:
2374 	while (pending_scrq(adapter, scrq)) {
2375 		unsigned int pool = scrq->pool_index;
2376 
2377 		next = ibmvnic_next_scrq(adapter, scrq);
2378 		for (i = 0; i < next->tx_comp.num_comps; i++) {
2379 			if (next->tx_comp.rcs[i]) {
2380 				dev_err(dev, "tx error %x\n",
2381 					next->tx_comp.rcs[i]);
2382 				continue;
2383 			}
2384 			index = be32_to_cpu(next->tx_comp.correlators[i]);
2385 			txbuff = &adapter->tx_pool[pool].tx_buff[index];
2386 
2387 			for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2388 				if (!txbuff->data_dma[j])
2389 					continue;
2390 
2391 				txbuff->data_dma[j] = 0;
2392 			}
2393 			/* if sub_crq was sent indirectly */
2394 			first = txbuff->indir_arr[0].generic.first;
2395 			if (first == IBMVNIC_CRQ_CMD) {
2396 				dma_unmap_single(dev, txbuff->indir_dma,
2397 						 sizeof(txbuff->indir_arr),
2398 						 DMA_TO_DEVICE);
2399 			}
2400 
2401 			if (txbuff->last_frag) {
2402 				dev_kfree_skb_any(txbuff->skb);
2403 				txbuff->skb = NULL;
2404 			}
2405 
2406 			adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2407 						     producer_index] = index;
2408 			adapter->tx_pool[pool].producer_index =
2409 			    (adapter->tx_pool[pool].producer_index + 1) %
2410 			    adapter->req_tx_entries_per_subcrq;
2411 		}
2412 		/* remove tx_comp scrq*/
2413 		next->tx_comp.first = 0;
2414 
2415 		if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2416 		    (adapter->req_tx_entries_per_subcrq / 2) &&
2417 		    __netif_subqueue_stopped(adapter->netdev,
2418 					     scrq->pool_index)) {
2419 			netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2420 			netdev_info(adapter->netdev, "Started queue %d\n",
2421 				    scrq->pool_index);
2422 		}
2423 	}
2424 
2425 	enable_scrq_irq(adapter, scrq);
2426 
2427 	if (pending_scrq(adapter, scrq)) {
2428 		disable_scrq_irq(adapter, scrq);
2429 		goto restart_loop;
2430 	}
2431 
2432 	return 0;
2433 }
2434 
2435 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2436 {
2437 	struct ibmvnic_sub_crq_queue *scrq = instance;
2438 	struct ibmvnic_adapter *adapter = scrq->adapter;
2439 
2440 	disable_scrq_irq(adapter, scrq);
2441 	ibmvnic_complete_tx(adapter, scrq);
2442 
2443 	return IRQ_HANDLED;
2444 }
2445 
2446 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2447 {
2448 	struct ibmvnic_sub_crq_queue *scrq = instance;
2449 	struct ibmvnic_adapter *adapter = scrq->adapter;
2450 
2451 	adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2452 
2453 	if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2454 		disable_scrq_irq(adapter, scrq);
2455 		__napi_schedule(&adapter->napi[scrq->scrq_num]);
2456 	}
2457 
2458 	return IRQ_HANDLED;
2459 }
2460 
2461 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2462 {
2463 	struct device *dev = &adapter->vdev->dev;
2464 	struct ibmvnic_sub_crq_queue *scrq;
2465 	int i = 0, j = 0;
2466 	int rc = 0;
2467 
2468 	for (i = 0; i < adapter->req_tx_queues; i++) {
2469 		netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2470 			   i);
2471 		scrq = adapter->tx_scrq[i];
2472 		scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2473 
2474 		if (!scrq->irq) {
2475 			rc = -EINVAL;
2476 			dev_err(dev, "Error mapping irq\n");
2477 			goto req_tx_irq_failed;
2478 		}
2479 
2480 		rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2481 				 0, "ibmvnic_tx", scrq);
2482 
2483 		if (rc) {
2484 			dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2485 				scrq->irq, rc);
2486 			irq_dispose_mapping(scrq->irq);
2487 			goto req_rx_irq_failed;
2488 		}
2489 	}
2490 
2491 	for (i = 0; i < adapter->req_rx_queues; i++) {
2492 		netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2493 			   i);
2494 		scrq = adapter->rx_scrq[i];
2495 		scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2496 		if (!scrq->irq) {
2497 			rc = -EINVAL;
2498 			dev_err(dev, "Error mapping irq\n");
2499 			goto req_rx_irq_failed;
2500 		}
2501 		rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2502 				 0, "ibmvnic_rx", scrq);
2503 		if (rc) {
2504 			dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2505 				scrq->irq, rc);
2506 			irq_dispose_mapping(scrq->irq);
2507 			goto req_rx_irq_failed;
2508 		}
2509 	}
2510 	return rc;
2511 
2512 req_rx_irq_failed:
2513 	for (j = 0; j < i; j++) {
2514 		free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2515 		irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2516 	}
2517 	i = adapter->req_tx_queues;
2518 req_tx_irq_failed:
2519 	for (j = 0; j < i; j++) {
2520 		free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2521 		irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2522 	}
2523 	release_sub_crqs(adapter);
2524 	return rc;
2525 }
2526 
2527 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2528 {
2529 	struct device *dev = &adapter->vdev->dev;
2530 	struct ibmvnic_sub_crq_queue **allqueues;
2531 	int registered_queues = 0;
2532 	int total_queues;
2533 	int more = 0;
2534 	int i;
2535 
2536 	total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2537 
2538 	allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2539 	if (!allqueues)
2540 		return -1;
2541 
2542 	for (i = 0; i < total_queues; i++) {
2543 		allqueues[i] = init_sub_crq_queue(adapter);
2544 		if (!allqueues[i]) {
2545 			dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2546 			break;
2547 		}
2548 		registered_queues++;
2549 	}
2550 
2551 	/* Make sure we were able to register the minimum number of queues */
2552 	if (registered_queues <
2553 	    adapter->min_tx_queues + adapter->min_rx_queues) {
2554 		dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2555 		goto tx_failed;
2556 	}
2557 
2558 	/* Distribute the failed allocated queues*/
2559 	for (i = 0; i < total_queues - registered_queues + more ; i++) {
2560 		netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2561 		switch (i % 3) {
2562 		case 0:
2563 			if (adapter->req_rx_queues > adapter->min_rx_queues)
2564 				adapter->req_rx_queues--;
2565 			else
2566 				more++;
2567 			break;
2568 		case 1:
2569 			if (adapter->req_tx_queues > adapter->min_tx_queues)
2570 				adapter->req_tx_queues--;
2571 			else
2572 				more++;
2573 			break;
2574 		}
2575 	}
2576 
2577 	adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2578 				   sizeof(*adapter->tx_scrq), GFP_KERNEL);
2579 	if (!adapter->tx_scrq)
2580 		goto tx_failed;
2581 
2582 	for (i = 0; i < adapter->req_tx_queues; i++) {
2583 		adapter->tx_scrq[i] = allqueues[i];
2584 		adapter->tx_scrq[i]->pool_index = i;
2585 	}
2586 
2587 	adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2588 				   sizeof(*adapter->rx_scrq), GFP_KERNEL);
2589 	if (!adapter->rx_scrq)
2590 		goto rx_failed;
2591 
2592 	for (i = 0; i < adapter->req_rx_queues; i++) {
2593 		adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2594 		adapter->rx_scrq[i]->scrq_num = i;
2595 	}
2596 
2597 	kfree(allqueues);
2598 	return 0;
2599 
2600 rx_failed:
2601 	kfree(adapter->tx_scrq);
2602 	adapter->tx_scrq = NULL;
2603 tx_failed:
2604 	for (i = 0; i < registered_queues; i++)
2605 		release_sub_crq_queue(adapter, allqueues[i]);
2606 	kfree(allqueues);
2607 	return -1;
2608 }
2609 
2610 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2611 {
2612 	struct device *dev = &adapter->vdev->dev;
2613 	union ibmvnic_crq crq;
2614 	int max_entries;
2615 
2616 	if (!retry) {
2617 		/* Sub-CRQ entries are 32 byte long */
2618 		int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2619 
2620 		if (adapter->min_tx_entries_per_subcrq > entries_page ||
2621 		    adapter->min_rx_add_entries_per_subcrq > entries_page) {
2622 			dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2623 			return;
2624 		}
2625 
2626 		if (adapter->desired.mtu)
2627 			adapter->req_mtu = adapter->desired.mtu;
2628 		else
2629 			adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2630 
2631 		if (!adapter->desired.tx_entries)
2632 			adapter->desired.tx_entries =
2633 					adapter->max_tx_entries_per_subcrq;
2634 		if (!adapter->desired.rx_entries)
2635 			adapter->desired.rx_entries =
2636 					adapter->max_rx_add_entries_per_subcrq;
2637 
2638 		max_entries = IBMVNIC_MAX_LTB_SIZE /
2639 			      (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2640 
2641 		if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2642 			adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2643 			adapter->desired.tx_entries = max_entries;
2644 		}
2645 
2646 		if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2647 			adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2648 			adapter->desired.rx_entries = max_entries;
2649 		}
2650 
2651 		if (adapter->desired.tx_entries)
2652 			adapter->req_tx_entries_per_subcrq =
2653 					adapter->desired.tx_entries;
2654 		else
2655 			adapter->req_tx_entries_per_subcrq =
2656 					adapter->max_tx_entries_per_subcrq;
2657 
2658 		if (adapter->desired.rx_entries)
2659 			adapter->req_rx_add_entries_per_subcrq =
2660 					adapter->desired.rx_entries;
2661 		else
2662 			adapter->req_rx_add_entries_per_subcrq =
2663 					adapter->max_rx_add_entries_per_subcrq;
2664 
2665 		if (adapter->desired.tx_queues)
2666 			adapter->req_tx_queues =
2667 					adapter->desired.tx_queues;
2668 		else
2669 			adapter->req_tx_queues =
2670 					adapter->opt_tx_comp_sub_queues;
2671 
2672 		if (adapter->desired.rx_queues)
2673 			adapter->req_rx_queues =
2674 					adapter->desired.rx_queues;
2675 		else
2676 			adapter->req_rx_queues =
2677 					adapter->opt_rx_comp_queues;
2678 
2679 		adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2680 	}
2681 
2682 	memset(&crq, 0, sizeof(crq));
2683 	crq.request_capability.first = IBMVNIC_CRQ_CMD;
2684 	crq.request_capability.cmd = REQUEST_CAPABILITY;
2685 
2686 	crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2687 	crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2688 	atomic_inc(&adapter->running_cap_crqs);
2689 	ibmvnic_send_crq(adapter, &crq);
2690 
2691 	crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2692 	crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2693 	atomic_inc(&adapter->running_cap_crqs);
2694 	ibmvnic_send_crq(adapter, &crq);
2695 
2696 	crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2697 	crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2698 	atomic_inc(&adapter->running_cap_crqs);
2699 	ibmvnic_send_crq(adapter, &crq);
2700 
2701 	crq.request_capability.capability =
2702 	    cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2703 	crq.request_capability.number =
2704 	    cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2705 	atomic_inc(&adapter->running_cap_crqs);
2706 	ibmvnic_send_crq(adapter, &crq);
2707 
2708 	crq.request_capability.capability =
2709 	    cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2710 	crq.request_capability.number =
2711 	    cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2712 	atomic_inc(&adapter->running_cap_crqs);
2713 	ibmvnic_send_crq(adapter, &crq);
2714 
2715 	crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2716 	crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2717 	atomic_inc(&adapter->running_cap_crqs);
2718 	ibmvnic_send_crq(adapter, &crq);
2719 
2720 	if (adapter->netdev->flags & IFF_PROMISC) {
2721 		if (adapter->promisc_supported) {
2722 			crq.request_capability.capability =
2723 			    cpu_to_be16(PROMISC_REQUESTED);
2724 			crq.request_capability.number = cpu_to_be64(1);
2725 			atomic_inc(&adapter->running_cap_crqs);
2726 			ibmvnic_send_crq(adapter, &crq);
2727 		}
2728 	} else {
2729 		crq.request_capability.capability =
2730 		    cpu_to_be16(PROMISC_REQUESTED);
2731 		crq.request_capability.number = cpu_to_be64(0);
2732 		atomic_inc(&adapter->running_cap_crqs);
2733 		ibmvnic_send_crq(adapter, &crq);
2734 	}
2735 }
2736 
2737 static int pending_scrq(struct ibmvnic_adapter *adapter,
2738 			struct ibmvnic_sub_crq_queue *scrq)
2739 {
2740 	union sub_crq *entry = &scrq->msgs[scrq->cur];
2741 
2742 	if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2743 		return 1;
2744 	else
2745 		return 0;
2746 }
2747 
2748 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2749 					struct ibmvnic_sub_crq_queue *scrq)
2750 {
2751 	union sub_crq *entry;
2752 	unsigned long flags;
2753 
2754 	spin_lock_irqsave(&scrq->lock, flags);
2755 	entry = &scrq->msgs[scrq->cur];
2756 	if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2757 		if (++scrq->cur == scrq->size)
2758 			scrq->cur = 0;
2759 	} else {
2760 		entry = NULL;
2761 	}
2762 	spin_unlock_irqrestore(&scrq->lock, flags);
2763 
2764 	return entry;
2765 }
2766 
2767 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2768 {
2769 	struct ibmvnic_crq_queue *queue = &adapter->crq;
2770 	union ibmvnic_crq *crq;
2771 
2772 	crq = &queue->msgs[queue->cur];
2773 	if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2774 		if (++queue->cur == queue->size)
2775 			queue->cur = 0;
2776 	} else {
2777 		crq = NULL;
2778 	}
2779 
2780 	return crq;
2781 }
2782 
2783 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2784 		       union sub_crq *sub_crq)
2785 {
2786 	unsigned int ua = adapter->vdev->unit_address;
2787 	struct device *dev = &adapter->vdev->dev;
2788 	u64 *u64_crq = (u64 *)sub_crq;
2789 	int rc;
2790 
2791 	netdev_dbg(adapter->netdev,
2792 		   "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2793 		   (unsigned long int)cpu_to_be64(remote_handle),
2794 		   (unsigned long int)cpu_to_be64(u64_crq[0]),
2795 		   (unsigned long int)cpu_to_be64(u64_crq[1]),
2796 		   (unsigned long int)cpu_to_be64(u64_crq[2]),
2797 		   (unsigned long int)cpu_to_be64(u64_crq[3]));
2798 
2799 	/* Make sure the hypervisor sees the complete request */
2800 	mb();
2801 
2802 	rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2803 				cpu_to_be64(remote_handle),
2804 				cpu_to_be64(u64_crq[0]),
2805 				cpu_to_be64(u64_crq[1]),
2806 				cpu_to_be64(u64_crq[2]),
2807 				cpu_to_be64(u64_crq[3]));
2808 
2809 	if (rc) {
2810 		if (rc == H_CLOSED)
2811 			dev_warn(dev, "CRQ Queue closed\n");
2812 		dev_err(dev, "Send error (rc=%d)\n", rc);
2813 	}
2814 
2815 	return rc;
2816 }
2817 
2818 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2819 				u64 remote_handle, u64 ioba, u64 num_entries)
2820 {
2821 	unsigned int ua = adapter->vdev->unit_address;
2822 	struct device *dev = &adapter->vdev->dev;
2823 	int rc;
2824 
2825 	/* Make sure the hypervisor sees the complete request */
2826 	mb();
2827 	rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2828 				cpu_to_be64(remote_handle),
2829 				ioba, num_entries);
2830 
2831 	if (rc) {
2832 		if (rc == H_CLOSED)
2833 			dev_warn(dev, "CRQ Queue closed\n");
2834 		dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2835 	}
2836 
2837 	return rc;
2838 }
2839 
2840 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2841 			    union ibmvnic_crq *crq)
2842 {
2843 	unsigned int ua = adapter->vdev->unit_address;
2844 	struct device *dev = &adapter->vdev->dev;
2845 	u64 *u64_crq = (u64 *)crq;
2846 	int rc;
2847 
2848 	netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2849 		   (unsigned long int)cpu_to_be64(u64_crq[0]),
2850 		   (unsigned long int)cpu_to_be64(u64_crq[1]));
2851 
2852 	/* Make sure the hypervisor sees the complete request */
2853 	mb();
2854 
2855 	rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2856 				cpu_to_be64(u64_crq[0]),
2857 				cpu_to_be64(u64_crq[1]));
2858 
2859 	if (rc) {
2860 		if (rc == H_CLOSED)
2861 			dev_warn(dev, "CRQ Queue closed\n");
2862 		dev_warn(dev, "Send error (rc=%d)\n", rc);
2863 	}
2864 
2865 	return rc;
2866 }
2867 
2868 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2869 {
2870 	union ibmvnic_crq crq;
2871 
2872 	memset(&crq, 0, sizeof(crq));
2873 	crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2874 	crq.generic.cmd = IBMVNIC_CRQ_INIT;
2875 	netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2876 
2877 	return ibmvnic_send_crq(adapter, &crq);
2878 }
2879 
2880 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2881 {
2882 	union ibmvnic_crq crq;
2883 
2884 	memset(&crq, 0, sizeof(crq));
2885 	crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2886 	crq.version_exchange.cmd = VERSION_EXCHANGE;
2887 	crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2888 
2889 	return ibmvnic_send_crq(adapter, &crq);
2890 }
2891 
2892 struct vnic_login_client_data {
2893 	u8	type;
2894 	__be16	len;
2895 	char	name;
2896 } __packed;
2897 
2898 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
2899 {
2900 	int len;
2901 
2902 	/* Calculate the amount of buffer space needed for the
2903 	 * vnic client data in the login buffer. There are four entries,
2904 	 * OS name, LPAR name, device name, and a null last entry.
2905 	 */
2906 	len = 4 * sizeof(struct vnic_login_client_data);
2907 	len += 6; /* "Linux" plus NULL */
2908 	len += strlen(utsname()->nodename) + 1;
2909 	len += strlen(adapter->netdev->name) + 1;
2910 
2911 	return len;
2912 }
2913 
2914 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
2915 				 struct vnic_login_client_data *vlcd)
2916 {
2917 	const char *os_name = "Linux";
2918 	int len;
2919 
2920 	/* Type 1 - LPAR OS */
2921 	vlcd->type = 1;
2922 	len = strlen(os_name) + 1;
2923 	vlcd->len = cpu_to_be16(len);
2924 	strncpy(&vlcd->name, os_name, len);
2925 	vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2926 
2927 	/* Type 2 - LPAR name */
2928 	vlcd->type = 2;
2929 	len = strlen(utsname()->nodename) + 1;
2930 	vlcd->len = cpu_to_be16(len);
2931 	strncpy(&vlcd->name, utsname()->nodename, len);
2932 	vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2933 
2934 	/* Type 3 - device name */
2935 	vlcd->type = 3;
2936 	len = strlen(adapter->netdev->name) + 1;
2937 	vlcd->len = cpu_to_be16(len);
2938 	strncpy(&vlcd->name, adapter->netdev->name, len);
2939 }
2940 
2941 static void send_login(struct ibmvnic_adapter *adapter)
2942 {
2943 	struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2944 	struct ibmvnic_login_buffer *login_buffer;
2945 	struct device *dev = &adapter->vdev->dev;
2946 	dma_addr_t rsp_buffer_token;
2947 	dma_addr_t buffer_token;
2948 	size_t rsp_buffer_size;
2949 	union ibmvnic_crq crq;
2950 	size_t buffer_size;
2951 	__be64 *tx_list_p;
2952 	__be64 *rx_list_p;
2953 	int client_data_len;
2954 	struct vnic_login_client_data *vlcd;
2955 	int i;
2956 
2957 	client_data_len = vnic_client_data_len(adapter);
2958 
2959 	buffer_size =
2960 	    sizeof(struct ibmvnic_login_buffer) +
2961 	    sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
2962 	    client_data_len;
2963 
2964 	login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
2965 	if (!login_buffer)
2966 		goto buf_alloc_failed;
2967 
2968 	buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2969 				      DMA_TO_DEVICE);
2970 	if (dma_mapping_error(dev, buffer_token)) {
2971 		dev_err(dev, "Couldn't map login buffer\n");
2972 		goto buf_map_failed;
2973 	}
2974 
2975 	rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2976 			  sizeof(u64) * adapter->req_tx_queues +
2977 			  sizeof(u64) * adapter->req_rx_queues +
2978 			  sizeof(u64) * adapter->req_rx_queues +
2979 			  sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2980 
2981 	login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2982 	if (!login_rsp_buffer)
2983 		goto buf_rsp_alloc_failed;
2984 
2985 	rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2986 					  rsp_buffer_size, DMA_FROM_DEVICE);
2987 	if (dma_mapping_error(dev, rsp_buffer_token)) {
2988 		dev_err(dev, "Couldn't map login rsp buffer\n");
2989 		goto buf_rsp_map_failed;
2990 	}
2991 
2992 	adapter->login_buf = login_buffer;
2993 	adapter->login_buf_token = buffer_token;
2994 	adapter->login_buf_sz = buffer_size;
2995 	adapter->login_rsp_buf = login_rsp_buffer;
2996 	adapter->login_rsp_buf_token = rsp_buffer_token;
2997 	adapter->login_rsp_buf_sz = rsp_buffer_size;
2998 
2999 	login_buffer->len = cpu_to_be32(buffer_size);
3000 	login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3001 	login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3002 	login_buffer->off_txcomp_subcrqs =
3003 	    cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3004 	login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3005 	login_buffer->off_rxcomp_subcrqs =
3006 	    cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3007 			sizeof(u64) * adapter->req_tx_queues);
3008 	login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3009 	login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3010 
3011 	tx_list_p = (__be64 *)((char *)login_buffer +
3012 				      sizeof(struct ibmvnic_login_buffer));
3013 	rx_list_p = (__be64 *)((char *)login_buffer +
3014 				      sizeof(struct ibmvnic_login_buffer) +
3015 				      sizeof(u64) * adapter->req_tx_queues);
3016 
3017 	for (i = 0; i < adapter->req_tx_queues; i++) {
3018 		if (adapter->tx_scrq[i]) {
3019 			tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3020 						   crq_num);
3021 		}
3022 	}
3023 
3024 	for (i = 0; i < adapter->req_rx_queues; i++) {
3025 		if (adapter->rx_scrq[i]) {
3026 			rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3027 						   crq_num);
3028 		}
3029 	}
3030 
3031 	/* Insert vNIC login client data */
3032 	vlcd = (struct vnic_login_client_data *)
3033 		((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3034 	login_buffer->client_data_offset =
3035 			cpu_to_be32((char *)vlcd - (char *)login_buffer);
3036 	login_buffer->client_data_len = cpu_to_be32(client_data_len);
3037 
3038 	vnic_add_client_data(adapter, vlcd);
3039 
3040 	netdev_dbg(adapter->netdev, "Login Buffer:\n");
3041 	for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3042 		netdev_dbg(adapter->netdev, "%016lx\n",
3043 			   ((unsigned long int *)(adapter->login_buf))[i]);
3044 	}
3045 
3046 	memset(&crq, 0, sizeof(crq));
3047 	crq.login.first = IBMVNIC_CRQ_CMD;
3048 	crq.login.cmd = LOGIN;
3049 	crq.login.ioba = cpu_to_be32(buffer_token);
3050 	crq.login.len = cpu_to_be32(buffer_size);
3051 	ibmvnic_send_crq(adapter, &crq);
3052 
3053 	return;
3054 
3055 buf_rsp_map_failed:
3056 	kfree(login_rsp_buffer);
3057 buf_rsp_alloc_failed:
3058 	dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3059 buf_map_failed:
3060 	kfree(login_buffer);
3061 buf_alloc_failed:
3062 	return;
3063 }
3064 
3065 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3066 			     u32 len, u8 map_id)
3067 {
3068 	union ibmvnic_crq crq;
3069 
3070 	memset(&crq, 0, sizeof(crq));
3071 	crq.request_map.first = IBMVNIC_CRQ_CMD;
3072 	crq.request_map.cmd = REQUEST_MAP;
3073 	crq.request_map.map_id = map_id;
3074 	crq.request_map.ioba = cpu_to_be32(addr);
3075 	crq.request_map.len = cpu_to_be32(len);
3076 	ibmvnic_send_crq(adapter, &crq);
3077 }
3078 
3079 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3080 {
3081 	union ibmvnic_crq crq;
3082 
3083 	memset(&crq, 0, sizeof(crq));
3084 	crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3085 	crq.request_unmap.cmd = REQUEST_UNMAP;
3086 	crq.request_unmap.map_id = map_id;
3087 	ibmvnic_send_crq(adapter, &crq);
3088 }
3089 
3090 static void send_map_query(struct ibmvnic_adapter *adapter)
3091 {
3092 	union ibmvnic_crq crq;
3093 
3094 	memset(&crq, 0, sizeof(crq));
3095 	crq.query_map.first = IBMVNIC_CRQ_CMD;
3096 	crq.query_map.cmd = QUERY_MAP;
3097 	ibmvnic_send_crq(adapter, &crq);
3098 }
3099 
3100 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3101 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3102 {
3103 	union ibmvnic_crq crq;
3104 
3105 	atomic_set(&adapter->running_cap_crqs, 0);
3106 	memset(&crq, 0, sizeof(crq));
3107 	crq.query_capability.first = IBMVNIC_CRQ_CMD;
3108 	crq.query_capability.cmd = QUERY_CAPABILITY;
3109 
3110 	crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3111 	atomic_inc(&adapter->running_cap_crqs);
3112 	ibmvnic_send_crq(adapter, &crq);
3113 
3114 	crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3115 	atomic_inc(&adapter->running_cap_crqs);
3116 	ibmvnic_send_crq(adapter, &crq);
3117 
3118 	crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3119 	atomic_inc(&adapter->running_cap_crqs);
3120 	ibmvnic_send_crq(adapter, &crq);
3121 
3122 	crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3123 	atomic_inc(&adapter->running_cap_crqs);
3124 	ibmvnic_send_crq(adapter, &crq);
3125 
3126 	crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3127 	atomic_inc(&adapter->running_cap_crqs);
3128 	ibmvnic_send_crq(adapter, &crq);
3129 
3130 	crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3131 	atomic_inc(&adapter->running_cap_crqs);
3132 	ibmvnic_send_crq(adapter, &crq);
3133 
3134 	crq.query_capability.capability =
3135 	    cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3136 	atomic_inc(&adapter->running_cap_crqs);
3137 	ibmvnic_send_crq(adapter, &crq);
3138 
3139 	crq.query_capability.capability =
3140 	    cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3141 	atomic_inc(&adapter->running_cap_crqs);
3142 	ibmvnic_send_crq(adapter, &crq);
3143 
3144 	crq.query_capability.capability =
3145 	    cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3146 	atomic_inc(&adapter->running_cap_crqs);
3147 	ibmvnic_send_crq(adapter, &crq);
3148 
3149 	crq.query_capability.capability =
3150 	    cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3151 	atomic_inc(&adapter->running_cap_crqs);
3152 	ibmvnic_send_crq(adapter, &crq);
3153 
3154 	crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3155 	atomic_inc(&adapter->running_cap_crqs);
3156 	ibmvnic_send_crq(adapter, &crq);
3157 
3158 	crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3159 	atomic_inc(&adapter->running_cap_crqs);
3160 	ibmvnic_send_crq(adapter, &crq);
3161 
3162 	crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3163 	atomic_inc(&adapter->running_cap_crqs);
3164 	ibmvnic_send_crq(adapter, &crq);
3165 
3166 	crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3167 	atomic_inc(&adapter->running_cap_crqs);
3168 	ibmvnic_send_crq(adapter, &crq);
3169 
3170 	crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3171 	atomic_inc(&adapter->running_cap_crqs);
3172 	ibmvnic_send_crq(adapter, &crq);
3173 
3174 	crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3175 	atomic_inc(&adapter->running_cap_crqs);
3176 	ibmvnic_send_crq(adapter, &crq);
3177 
3178 	crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3179 	atomic_inc(&adapter->running_cap_crqs);
3180 	ibmvnic_send_crq(adapter, &crq);
3181 
3182 	crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3183 	atomic_inc(&adapter->running_cap_crqs);
3184 	ibmvnic_send_crq(adapter, &crq);
3185 
3186 	crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3187 	atomic_inc(&adapter->running_cap_crqs);
3188 	ibmvnic_send_crq(adapter, &crq);
3189 
3190 	crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3191 	atomic_inc(&adapter->running_cap_crqs);
3192 	ibmvnic_send_crq(adapter, &crq);
3193 
3194 	crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3195 	atomic_inc(&adapter->running_cap_crqs);
3196 	ibmvnic_send_crq(adapter, &crq);
3197 
3198 	crq.query_capability.capability =
3199 			cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3200 	atomic_inc(&adapter->running_cap_crqs);
3201 	ibmvnic_send_crq(adapter, &crq);
3202 
3203 	crq.query_capability.capability =
3204 			cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3205 	atomic_inc(&adapter->running_cap_crqs);
3206 	ibmvnic_send_crq(adapter, &crq);
3207 
3208 	crq.query_capability.capability =
3209 			cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3210 	atomic_inc(&adapter->running_cap_crqs);
3211 	ibmvnic_send_crq(adapter, &crq);
3212 
3213 	crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3214 	atomic_inc(&adapter->running_cap_crqs);
3215 	ibmvnic_send_crq(adapter, &crq);
3216 }
3217 
3218 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3219 				struct ibmvnic_adapter *adapter)
3220 {
3221 	struct device *dev = &adapter->vdev->dev;
3222 
3223 	if (crq->get_vpd_size_rsp.rc.code) {
3224 		dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3225 			crq->get_vpd_size_rsp.rc.code);
3226 		complete(&adapter->fw_done);
3227 		return;
3228 	}
3229 
3230 	adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3231 	complete(&adapter->fw_done);
3232 }
3233 
3234 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3235 			   struct ibmvnic_adapter *adapter)
3236 {
3237 	struct device *dev = &adapter->vdev->dev;
3238 	unsigned char *substr = NULL, *ptr = NULL;
3239 	u8 fw_level_len = 0;
3240 
3241 	memset(adapter->fw_version, 0, 32);
3242 
3243 	dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3244 			 DMA_FROM_DEVICE);
3245 
3246 	if (crq->get_vpd_rsp.rc.code) {
3247 		dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3248 			crq->get_vpd_rsp.rc.code);
3249 		goto complete;
3250 	}
3251 
3252 	/* get the position of the firmware version info
3253 	 * located after the ASCII 'RM' substring in the buffer
3254 	 */
3255 	substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3256 	if (!substr) {
3257 		dev_info(dev, "No FW level provided by VPD\n");
3258 		goto complete;
3259 	}
3260 
3261 	/* get length of firmware level ASCII substring */
3262 	if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3263 		fw_level_len = *(substr + 2);
3264 	} else {
3265 		dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3266 		goto complete;
3267 	}
3268 
3269 	/* copy firmware version string from vpd into adapter */
3270 	if ((substr + 3 + fw_level_len) <
3271 	    (adapter->vpd->buff + adapter->vpd->len)) {
3272 		ptr = strncpy((char *)adapter->fw_version,
3273 			      substr + 3, fw_level_len);
3274 
3275 		if (!ptr)
3276 			dev_err(dev, "Failed to isolate FW level string\n");
3277 	} else {
3278 		dev_info(dev, "FW substr extrapolated VPD buff\n");
3279 	}
3280 
3281 complete:
3282 	complete(&adapter->fw_done);
3283 }
3284 
3285 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3286 {
3287 	struct device *dev = &adapter->vdev->dev;
3288 	struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3289 	union ibmvnic_crq crq;
3290 	int i;
3291 
3292 	dma_unmap_single(dev, adapter->ip_offload_tok,
3293 			 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3294 
3295 	netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3296 	for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3297 		netdev_dbg(adapter->netdev, "%016lx\n",
3298 			   ((unsigned long int *)(buf))[i]);
3299 
3300 	netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3301 	netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3302 	netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3303 		   buf->tcp_ipv4_chksum);
3304 	netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3305 		   buf->tcp_ipv6_chksum);
3306 	netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3307 		   buf->udp_ipv4_chksum);
3308 	netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3309 		   buf->udp_ipv6_chksum);
3310 	netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3311 		   buf->large_tx_ipv4);
3312 	netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3313 		   buf->large_tx_ipv6);
3314 	netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3315 		   buf->large_rx_ipv4);
3316 	netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3317 		   buf->large_rx_ipv6);
3318 	netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3319 		   buf->max_ipv4_header_size);
3320 	netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3321 		   buf->max_ipv6_header_size);
3322 	netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3323 		   buf->max_tcp_header_size);
3324 	netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3325 		   buf->max_udp_header_size);
3326 	netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3327 		   buf->max_large_tx_size);
3328 	netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3329 		   buf->max_large_rx_size);
3330 	netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3331 		   buf->ipv6_extension_header);
3332 	netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3333 		   buf->tcp_pseudosum_req);
3334 	netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3335 		   buf->num_ipv6_ext_headers);
3336 	netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3337 		   buf->off_ipv6_ext_headers);
3338 
3339 	adapter->ip_offload_ctrl_tok =
3340 	    dma_map_single(dev, &adapter->ip_offload_ctrl,
3341 			   sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3342 
3343 	if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3344 		dev_err(dev, "Couldn't map ip offload control buffer\n");
3345 		return;
3346 	}
3347 
3348 	adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3349 	adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3350 	adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3351 	adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3352 	adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3353 	adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3354 	adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3355 
3356 	/* large_rx disabled for now, additional features needed */
3357 	adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3358 	adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3359 
3360 	adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3361 
3362 	if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3363 		adapter->netdev->features |= NETIF_F_IP_CSUM;
3364 
3365 	if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3366 		adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3367 
3368 	if ((adapter->netdev->features &
3369 	    (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3370 		adapter->netdev->features |= NETIF_F_RXCSUM;
3371 
3372 	if (buf->large_tx_ipv4)
3373 		adapter->netdev->features |= NETIF_F_TSO;
3374 	if (buf->large_tx_ipv6)
3375 		adapter->netdev->features |= NETIF_F_TSO6;
3376 
3377 	adapter->netdev->hw_features |= adapter->netdev->features;
3378 
3379 	memset(&crq, 0, sizeof(crq));
3380 	crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3381 	crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3382 	crq.control_ip_offload.len =
3383 	    cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3384 	crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3385 	ibmvnic_send_crq(adapter, &crq);
3386 }
3387 
3388 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3389 				  struct ibmvnic_adapter *adapter)
3390 {
3391 	struct device *dev = &adapter->vdev->dev;
3392 	struct ibmvnic_error_buff *error_buff, *tmp;
3393 	unsigned long flags;
3394 	bool found = false;
3395 	int i;
3396 
3397 	if (!crq->request_error_rsp.rc.code) {
3398 		dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3399 			 crq->request_error_rsp.rc.code);
3400 		return;
3401 	}
3402 
3403 	spin_lock_irqsave(&adapter->error_list_lock, flags);
3404 	list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3405 		if (error_buff->error_id == crq->request_error_rsp.error_id) {
3406 			found = true;
3407 			list_del(&error_buff->list);
3408 			break;
3409 		}
3410 	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3411 
3412 	if (!found) {
3413 		dev_err(dev, "Couldn't find error id %x\n",
3414 			be32_to_cpu(crq->request_error_rsp.error_id));
3415 		return;
3416 	}
3417 
3418 	dev_err(dev, "Detailed info for error id %x:",
3419 		be32_to_cpu(crq->request_error_rsp.error_id));
3420 
3421 	for (i = 0; i < error_buff->len; i++) {
3422 		pr_cont("%02x", (int)error_buff->buff[i]);
3423 		if (i % 8 == 7)
3424 			pr_cont(" ");
3425 	}
3426 	pr_cont("\n");
3427 
3428 	dma_unmap_single(dev, error_buff->dma, error_buff->len,
3429 			 DMA_FROM_DEVICE);
3430 	kfree(error_buff->buff);
3431 	kfree(error_buff);
3432 }
3433 
3434 static void request_error_information(struct ibmvnic_adapter *adapter,
3435 				      union ibmvnic_crq *err_crq)
3436 {
3437 	struct device *dev = &adapter->vdev->dev;
3438 	struct net_device *netdev = adapter->netdev;
3439 	struct ibmvnic_error_buff *error_buff;
3440 	unsigned long timeout = msecs_to_jiffies(30000);
3441 	union ibmvnic_crq crq;
3442 	unsigned long flags;
3443 	int rc, detail_len;
3444 
3445 	error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3446 	if (!error_buff)
3447 		return;
3448 
3449 	detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3450 	error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3451 	if (!error_buff->buff) {
3452 		kfree(error_buff);
3453 		return;
3454 	}
3455 
3456 	error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3457 					 DMA_FROM_DEVICE);
3458 	if (dma_mapping_error(dev, error_buff->dma)) {
3459 		netdev_err(netdev, "Couldn't map error buffer\n");
3460 		kfree(error_buff->buff);
3461 		kfree(error_buff);
3462 		return;
3463 	}
3464 
3465 	error_buff->len = detail_len;
3466 	error_buff->error_id = err_crq->error_indication.error_id;
3467 
3468 	spin_lock_irqsave(&adapter->error_list_lock, flags);
3469 	list_add_tail(&error_buff->list, &adapter->errors);
3470 	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3471 
3472 	memset(&crq, 0, sizeof(crq));
3473 	crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3474 	crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3475 	crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3476 	crq.request_error_info.len = cpu_to_be32(detail_len);
3477 	crq.request_error_info.error_id = err_crq->error_indication.error_id;
3478 
3479 	rc = ibmvnic_send_crq(adapter, &crq);
3480 	if (rc) {
3481 		netdev_err(netdev, "failed to request error information\n");
3482 		goto err_info_fail;
3483 	}
3484 
3485 	if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3486 		netdev_err(netdev, "timeout waiting for error information\n");
3487 		goto err_info_fail;
3488 	}
3489 
3490 	return;
3491 
3492 err_info_fail:
3493 	spin_lock_irqsave(&adapter->error_list_lock, flags);
3494 	list_del(&error_buff->list);
3495 	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3496 
3497 	kfree(error_buff->buff);
3498 	kfree(error_buff);
3499 }
3500 
3501 static void handle_error_indication(union ibmvnic_crq *crq,
3502 				    struct ibmvnic_adapter *adapter)
3503 {
3504 	struct device *dev = &adapter->vdev->dev;
3505 
3506 	dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3507 		crq->error_indication.flags
3508 			& IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3509 		be32_to_cpu(crq->error_indication.error_id),
3510 		be16_to_cpu(crq->error_indication.error_cause));
3511 
3512 	if (be32_to_cpu(crq->error_indication.error_id))
3513 		request_error_information(adapter, crq);
3514 
3515 	if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3516 		ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3517 	else
3518 		ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3519 }
3520 
3521 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
3522 				  struct ibmvnic_adapter *adapter)
3523 {
3524 	struct net_device *netdev = adapter->netdev;
3525 	struct device *dev = &adapter->vdev->dev;
3526 	long rc;
3527 
3528 	rc = crq->change_mac_addr_rsp.rc.code;
3529 	if (rc) {
3530 		dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3531 		return;
3532 	}
3533 	memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3534 	       ETH_ALEN);
3535 }
3536 
3537 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3538 				   struct ibmvnic_adapter *adapter)
3539 {
3540 	struct device *dev = &adapter->vdev->dev;
3541 	u64 *req_value;
3542 	char *name;
3543 
3544 	atomic_dec(&adapter->running_cap_crqs);
3545 	switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3546 	case REQ_TX_QUEUES:
3547 		req_value = &adapter->req_tx_queues;
3548 		name = "tx";
3549 		break;
3550 	case REQ_RX_QUEUES:
3551 		req_value = &adapter->req_rx_queues;
3552 		name = "rx";
3553 		break;
3554 	case REQ_RX_ADD_QUEUES:
3555 		req_value = &adapter->req_rx_add_queues;
3556 		name = "rx_add";
3557 		break;
3558 	case REQ_TX_ENTRIES_PER_SUBCRQ:
3559 		req_value = &adapter->req_tx_entries_per_subcrq;
3560 		name = "tx_entries_per_subcrq";
3561 		break;
3562 	case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3563 		req_value = &adapter->req_rx_add_entries_per_subcrq;
3564 		name = "rx_add_entries_per_subcrq";
3565 		break;
3566 	case REQ_MTU:
3567 		req_value = &adapter->req_mtu;
3568 		name = "mtu";
3569 		break;
3570 	case PROMISC_REQUESTED:
3571 		req_value = &adapter->promisc;
3572 		name = "promisc";
3573 		break;
3574 	default:
3575 		dev_err(dev, "Got invalid cap request rsp %d\n",
3576 			crq->request_capability.capability);
3577 		return;
3578 	}
3579 
3580 	switch (crq->request_capability_rsp.rc.code) {
3581 	case SUCCESS:
3582 		break;
3583 	case PARTIALSUCCESS:
3584 		dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3585 			 *req_value,
3586 			 (long int)be64_to_cpu(crq->request_capability_rsp.
3587 					       number), name);
3588 		*req_value = be64_to_cpu(crq->request_capability_rsp.number);
3589 		ibmvnic_send_req_caps(adapter, 1);
3590 		return;
3591 	default:
3592 		dev_err(dev, "Error %d in request cap rsp\n",
3593 			crq->request_capability_rsp.rc.code);
3594 		return;
3595 	}
3596 
3597 	/* Done receiving requested capabilities, query IP offload support */
3598 	if (atomic_read(&adapter->running_cap_crqs) == 0) {
3599 		union ibmvnic_crq newcrq;
3600 		int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3601 		struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3602 		    &adapter->ip_offload_buf;
3603 
3604 		adapter->wait_capability = false;
3605 		adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3606 							 buf_sz,
3607 							 DMA_FROM_DEVICE);
3608 
3609 		if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3610 			if (!firmware_has_feature(FW_FEATURE_CMO))
3611 				dev_err(dev, "Couldn't map offload buffer\n");
3612 			return;
3613 		}
3614 
3615 		memset(&newcrq, 0, sizeof(newcrq));
3616 		newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3617 		newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3618 		newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3619 		newcrq.query_ip_offload.ioba =
3620 		    cpu_to_be32(adapter->ip_offload_tok);
3621 
3622 		ibmvnic_send_crq(adapter, &newcrq);
3623 	}
3624 }
3625 
3626 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3627 			    struct ibmvnic_adapter *adapter)
3628 {
3629 	struct device *dev = &adapter->vdev->dev;
3630 	struct net_device *netdev = adapter->netdev;
3631 	struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3632 	struct ibmvnic_login_buffer *login = adapter->login_buf;
3633 	int i;
3634 
3635 	dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3636 			 DMA_BIDIRECTIONAL);
3637 	dma_unmap_single(dev, adapter->login_rsp_buf_token,
3638 			 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3639 
3640 	/* If the number of queues requested can't be allocated by the
3641 	 * server, the login response will return with code 1. We will need
3642 	 * to resend the login buffer with fewer queues requested.
3643 	 */
3644 	if (login_rsp_crq->generic.rc.code) {
3645 		adapter->renegotiate = true;
3646 		complete(&adapter->init_done);
3647 		return 0;
3648 	}
3649 
3650 	netdev->mtu = adapter->req_mtu - ETH_HLEN;
3651 
3652 	netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3653 	for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3654 		netdev_dbg(adapter->netdev, "%016lx\n",
3655 			   ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3656 	}
3657 
3658 	/* Sanity checks */
3659 	if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3660 	    (be32_to_cpu(login->num_rxcomp_subcrqs) *
3661 	     adapter->req_rx_add_queues !=
3662 	     be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3663 		dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3664 		ibmvnic_remove(adapter->vdev);
3665 		return -EIO;
3666 	}
3667 	complete(&adapter->init_done);
3668 
3669 	return 0;
3670 }
3671 
3672 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3673 				     struct ibmvnic_adapter *adapter)
3674 {
3675 	struct device *dev = &adapter->vdev->dev;
3676 	long rc;
3677 
3678 	rc = crq->request_unmap_rsp.rc.code;
3679 	if (rc)
3680 		dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3681 }
3682 
3683 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3684 				 struct ibmvnic_adapter *adapter)
3685 {
3686 	struct net_device *netdev = adapter->netdev;
3687 	struct device *dev = &adapter->vdev->dev;
3688 	long rc;
3689 
3690 	rc = crq->query_map_rsp.rc.code;
3691 	if (rc) {
3692 		dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3693 		return;
3694 	}
3695 	netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3696 		   crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3697 		   crq->query_map_rsp.free_pages);
3698 }
3699 
3700 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3701 				 struct ibmvnic_adapter *adapter)
3702 {
3703 	struct net_device *netdev = adapter->netdev;
3704 	struct device *dev = &adapter->vdev->dev;
3705 	long rc;
3706 
3707 	atomic_dec(&adapter->running_cap_crqs);
3708 	netdev_dbg(netdev, "Outstanding queries: %d\n",
3709 		   atomic_read(&adapter->running_cap_crqs));
3710 	rc = crq->query_capability.rc.code;
3711 	if (rc) {
3712 		dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3713 		goto out;
3714 	}
3715 
3716 	switch (be16_to_cpu(crq->query_capability.capability)) {
3717 	case MIN_TX_QUEUES:
3718 		adapter->min_tx_queues =
3719 		    be64_to_cpu(crq->query_capability.number);
3720 		netdev_dbg(netdev, "min_tx_queues = %lld\n",
3721 			   adapter->min_tx_queues);
3722 		break;
3723 	case MIN_RX_QUEUES:
3724 		adapter->min_rx_queues =
3725 		    be64_to_cpu(crq->query_capability.number);
3726 		netdev_dbg(netdev, "min_rx_queues = %lld\n",
3727 			   adapter->min_rx_queues);
3728 		break;
3729 	case MIN_RX_ADD_QUEUES:
3730 		adapter->min_rx_add_queues =
3731 		    be64_to_cpu(crq->query_capability.number);
3732 		netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3733 			   adapter->min_rx_add_queues);
3734 		break;
3735 	case MAX_TX_QUEUES:
3736 		adapter->max_tx_queues =
3737 		    be64_to_cpu(crq->query_capability.number);
3738 		netdev_dbg(netdev, "max_tx_queues = %lld\n",
3739 			   adapter->max_tx_queues);
3740 		break;
3741 	case MAX_RX_QUEUES:
3742 		adapter->max_rx_queues =
3743 		    be64_to_cpu(crq->query_capability.number);
3744 		netdev_dbg(netdev, "max_rx_queues = %lld\n",
3745 			   adapter->max_rx_queues);
3746 		break;
3747 	case MAX_RX_ADD_QUEUES:
3748 		adapter->max_rx_add_queues =
3749 		    be64_to_cpu(crq->query_capability.number);
3750 		netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3751 			   adapter->max_rx_add_queues);
3752 		break;
3753 	case MIN_TX_ENTRIES_PER_SUBCRQ:
3754 		adapter->min_tx_entries_per_subcrq =
3755 		    be64_to_cpu(crq->query_capability.number);
3756 		netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3757 			   adapter->min_tx_entries_per_subcrq);
3758 		break;
3759 	case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3760 		adapter->min_rx_add_entries_per_subcrq =
3761 		    be64_to_cpu(crq->query_capability.number);
3762 		netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3763 			   adapter->min_rx_add_entries_per_subcrq);
3764 		break;
3765 	case MAX_TX_ENTRIES_PER_SUBCRQ:
3766 		adapter->max_tx_entries_per_subcrq =
3767 		    be64_to_cpu(crq->query_capability.number);
3768 		netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3769 			   adapter->max_tx_entries_per_subcrq);
3770 		break;
3771 	case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3772 		adapter->max_rx_add_entries_per_subcrq =
3773 		    be64_to_cpu(crq->query_capability.number);
3774 		netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3775 			   adapter->max_rx_add_entries_per_subcrq);
3776 		break;
3777 	case TCP_IP_OFFLOAD:
3778 		adapter->tcp_ip_offload =
3779 		    be64_to_cpu(crq->query_capability.number);
3780 		netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3781 			   adapter->tcp_ip_offload);
3782 		break;
3783 	case PROMISC_SUPPORTED:
3784 		adapter->promisc_supported =
3785 		    be64_to_cpu(crq->query_capability.number);
3786 		netdev_dbg(netdev, "promisc_supported = %lld\n",
3787 			   adapter->promisc_supported);
3788 		break;
3789 	case MIN_MTU:
3790 		adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3791 		netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3792 		netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3793 		break;
3794 	case MAX_MTU:
3795 		adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3796 		netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3797 		netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3798 		break;
3799 	case MAX_MULTICAST_FILTERS:
3800 		adapter->max_multicast_filters =
3801 		    be64_to_cpu(crq->query_capability.number);
3802 		netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3803 			   adapter->max_multicast_filters);
3804 		break;
3805 	case VLAN_HEADER_INSERTION:
3806 		adapter->vlan_header_insertion =
3807 		    be64_to_cpu(crq->query_capability.number);
3808 		if (adapter->vlan_header_insertion)
3809 			netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3810 		netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3811 			   adapter->vlan_header_insertion);
3812 		break;
3813 	case RX_VLAN_HEADER_INSERTION:
3814 		adapter->rx_vlan_header_insertion =
3815 		    be64_to_cpu(crq->query_capability.number);
3816 		netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3817 			   adapter->rx_vlan_header_insertion);
3818 		break;
3819 	case MAX_TX_SG_ENTRIES:
3820 		adapter->max_tx_sg_entries =
3821 		    be64_to_cpu(crq->query_capability.number);
3822 		netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3823 			   adapter->max_tx_sg_entries);
3824 		break;
3825 	case RX_SG_SUPPORTED:
3826 		adapter->rx_sg_supported =
3827 		    be64_to_cpu(crq->query_capability.number);
3828 		netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3829 			   adapter->rx_sg_supported);
3830 		break;
3831 	case OPT_TX_COMP_SUB_QUEUES:
3832 		adapter->opt_tx_comp_sub_queues =
3833 		    be64_to_cpu(crq->query_capability.number);
3834 		netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3835 			   adapter->opt_tx_comp_sub_queues);
3836 		break;
3837 	case OPT_RX_COMP_QUEUES:
3838 		adapter->opt_rx_comp_queues =
3839 		    be64_to_cpu(crq->query_capability.number);
3840 		netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3841 			   adapter->opt_rx_comp_queues);
3842 		break;
3843 	case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3844 		adapter->opt_rx_bufadd_q_per_rx_comp_q =
3845 		    be64_to_cpu(crq->query_capability.number);
3846 		netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3847 			   adapter->opt_rx_bufadd_q_per_rx_comp_q);
3848 		break;
3849 	case OPT_TX_ENTRIES_PER_SUBCRQ:
3850 		adapter->opt_tx_entries_per_subcrq =
3851 		    be64_to_cpu(crq->query_capability.number);
3852 		netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3853 			   adapter->opt_tx_entries_per_subcrq);
3854 		break;
3855 	case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3856 		adapter->opt_rxba_entries_per_subcrq =
3857 		    be64_to_cpu(crq->query_capability.number);
3858 		netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3859 			   adapter->opt_rxba_entries_per_subcrq);
3860 		break;
3861 	case TX_RX_DESC_REQ:
3862 		adapter->tx_rx_desc_req = crq->query_capability.number;
3863 		netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3864 			   adapter->tx_rx_desc_req);
3865 		break;
3866 
3867 	default:
3868 		netdev_err(netdev, "Got invalid cap rsp %d\n",
3869 			   crq->query_capability.capability);
3870 	}
3871 
3872 out:
3873 	if (atomic_read(&adapter->running_cap_crqs) == 0) {
3874 		adapter->wait_capability = false;
3875 		ibmvnic_send_req_caps(adapter, 0);
3876 	}
3877 }
3878 
3879 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3880 			       struct ibmvnic_adapter *adapter)
3881 {
3882 	struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3883 	struct net_device *netdev = adapter->netdev;
3884 	struct device *dev = &adapter->vdev->dev;
3885 	u64 *u64_crq = (u64 *)crq;
3886 	long rc;
3887 
3888 	netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3889 		   (unsigned long int)cpu_to_be64(u64_crq[0]),
3890 		   (unsigned long int)cpu_to_be64(u64_crq[1]));
3891 	switch (gen_crq->first) {
3892 	case IBMVNIC_CRQ_INIT_RSP:
3893 		switch (gen_crq->cmd) {
3894 		case IBMVNIC_CRQ_INIT:
3895 			dev_info(dev, "Partner initialized\n");
3896 			adapter->from_passive_init = true;
3897 			complete(&adapter->init_done);
3898 			break;
3899 		case IBMVNIC_CRQ_INIT_COMPLETE:
3900 			dev_info(dev, "Partner initialization complete\n");
3901 			send_version_xchg(adapter);
3902 			break;
3903 		default:
3904 			dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3905 		}
3906 		return;
3907 	case IBMVNIC_CRQ_XPORT_EVENT:
3908 		netif_carrier_off(netdev);
3909 		if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3910 			dev_info(dev, "Migrated, re-enabling adapter\n");
3911 			ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3912 		} else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3913 			dev_info(dev, "Backing device failover detected\n");
3914 			ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3915 		} else {
3916 			/* The adapter lost the connection */
3917 			dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3918 				gen_crq->cmd);
3919 			ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3920 		}
3921 		return;
3922 	case IBMVNIC_CRQ_CMD_RSP:
3923 		break;
3924 	default:
3925 		dev_err(dev, "Got an invalid msg type 0x%02x\n",
3926 			gen_crq->first);
3927 		return;
3928 	}
3929 
3930 	switch (gen_crq->cmd) {
3931 	case VERSION_EXCHANGE_RSP:
3932 		rc = crq->version_exchange_rsp.rc.code;
3933 		if (rc) {
3934 			dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3935 			break;
3936 		}
3937 		dev_info(dev, "Partner protocol version is %d\n",
3938 			 crq->version_exchange_rsp.version);
3939 		if (be16_to_cpu(crq->version_exchange_rsp.version) <
3940 		    ibmvnic_version)
3941 			ibmvnic_version =
3942 			    be16_to_cpu(crq->version_exchange_rsp.version);
3943 		send_cap_queries(adapter);
3944 		break;
3945 	case QUERY_CAPABILITY_RSP:
3946 		handle_query_cap_rsp(crq, adapter);
3947 		break;
3948 	case QUERY_MAP_RSP:
3949 		handle_query_map_rsp(crq, adapter);
3950 		break;
3951 	case REQUEST_MAP_RSP:
3952 		adapter->fw_done_rc = crq->request_map_rsp.rc.code;
3953 		complete(&adapter->fw_done);
3954 		break;
3955 	case REQUEST_UNMAP_RSP:
3956 		handle_request_unmap_rsp(crq, adapter);
3957 		break;
3958 	case REQUEST_CAPABILITY_RSP:
3959 		handle_request_cap_rsp(crq, adapter);
3960 		break;
3961 	case LOGIN_RSP:
3962 		netdev_dbg(netdev, "Got Login Response\n");
3963 		handle_login_rsp(crq, adapter);
3964 		break;
3965 	case LOGICAL_LINK_STATE_RSP:
3966 		netdev_dbg(netdev,
3967 			   "Got Logical Link State Response, state: %d rc: %d\n",
3968 			   crq->logical_link_state_rsp.link_state,
3969 			   crq->logical_link_state_rsp.rc.code);
3970 		adapter->logical_link_state =
3971 		    crq->logical_link_state_rsp.link_state;
3972 		adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3973 		complete(&adapter->init_done);
3974 		break;
3975 	case LINK_STATE_INDICATION:
3976 		netdev_dbg(netdev, "Got Logical Link State Indication\n");
3977 		adapter->phys_link_state =
3978 		    crq->link_state_indication.phys_link_state;
3979 		adapter->logical_link_state =
3980 		    crq->link_state_indication.logical_link_state;
3981 		break;
3982 	case CHANGE_MAC_ADDR_RSP:
3983 		netdev_dbg(netdev, "Got MAC address change Response\n");
3984 		handle_change_mac_rsp(crq, adapter);
3985 		break;
3986 	case ERROR_INDICATION:
3987 		netdev_dbg(netdev, "Got Error Indication\n");
3988 		handle_error_indication(crq, adapter);
3989 		break;
3990 	case REQUEST_ERROR_RSP:
3991 		netdev_dbg(netdev, "Got Error Detail Response\n");
3992 		handle_error_info_rsp(crq, adapter);
3993 		break;
3994 	case REQUEST_STATISTICS_RSP:
3995 		netdev_dbg(netdev, "Got Statistics Response\n");
3996 		complete(&adapter->stats_done);
3997 		break;
3998 	case QUERY_IP_OFFLOAD_RSP:
3999 		netdev_dbg(netdev, "Got Query IP offload Response\n");
4000 		handle_query_ip_offload_rsp(adapter);
4001 		break;
4002 	case MULTICAST_CTRL_RSP:
4003 		netdev_dbg(netdev, "Got multicast control Response\n");
4004 		break;
4005 	case CONTROL_IP_OFFLOAD_RSP:
4006 		netdev_dbg(netdev, "Got Control IP offload Response\n");
4007 		dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4008 				 sizeof(adapter->ip_offload_ctrl),
4009 				 DMA_TO_DEVICE);
4010 		complete(&adapter->init_done);
4011 		break;
4012 	case COLLECT_FW_TRACE_RSP:
4013 		netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4014 		complete(&adapter->fw_done);
4015 		break;
4016 	case GET_VPD_SIZE_RSP:
4017 		handle_vpd_size_rsp(crq, adapter);
4018 		break;
4019 	case GET_VPD_RSP:
4020 		handle_vpd_rsp(crq, adapter);
4021 		break;
4022 	default:
4023 		netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4024 			   gen_crq->cmd);
4025 	}
4026 }
4027 
4028 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4029 {
4030 	struct ibmvnic_adapter *adapter = instance;
4031 
4032 	tasklet_schedule(&adapter->tasklet);
4033 	return IRQ_HANDLED;
4034 }
4035 
4036 static void ibmvnic_tasklet(void *data)
4037 {
4038 	struct ibmvnic_adapter *adapter = data;
4039 	struct ibmvnic_crq_queue *queue = &adapter->crq;
4040 	union ibmvnic_crq *crq;
4041 	unsigned long flags;
4042 	bool done = false;
4043 
4044 	spin_lock_irqsave(&queue->lock, flags);
4045 	while (!done) {
4046 		/* Pull all the valid messages off the CRQ */
4047 		while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4048 			ibmvnic_handle_crq(crq, adapter);
4049 			crq->generic.first = 0;
4050 		}
4051 
4052 		/* remain in tasklet until all
4053 		 * capabilities responses are received
4054 		 */
4055 		if (!adapter->wait_capability)
4056 			done = true;
4057 	}
4058 	/* if capabilities CRQ's were sent in this tasklet, the following
4059 	 * tasklet must wait until all responses are received
4060 	 */
4061 	if (atomic_read(&adapter->running_cap_crqs) != 0)
4062 		adapter->wait_capability = true;
4063 	spin_unlock_irqrestore(&queue->lock, flags);
4064 }
4065 
4066 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4067 {
4068 	struct vio_dev *vdev = adapter->vdev;
4069 	int rc;
4070 
4071 	do {
4072 		rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4073 	} while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4074 
4075 	if (rc)
4076 		dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4077 
4078 	return rc;
4079 }
4080 
4081 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4082 {
4083 	struct ibmvnic_crq_queue *crq = &adapter->crq;
4084 	struct device *dev = &adapter->vdev->dev;
4085 	struct vio_dev *vdev = adapter->vdev;
4086 	int rc;
4087 
4088 	/* Close the CRQ */
4089 	do {
4090 		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4091 	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4092 
4093 	/* Clean out the queue */
4094 	memset(crq->msgs, 0, PAGE_SIZE);
4095 	crq->cur = 0;
4096 
4097 	/* And re-open it again */
4098 	rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4099 				crq->msg_token, PAGE_SIZE);
4100 
4101 	if (rc == H_CLOSED)
4102 		/* Adapter is good, but other end is not ready */
4103 		dev_warn(dev, "Partner adapter not ready\n");
4104 	else if (rc != 0)
4105 		dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4106 
4107 	return rc;
4108 }
4109 
4110 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4111 {
4112 	struct ibmvnic_crq_queue *crq = &adapter->crq;
4113 	struct vio_dev *vdev = adapter->vdev;
4114 	long rc;
4115 
4116 	if (!crq->msgs)
4117 		return;
4118 
4119 	netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4120 	free_irq(vdev->irq, adapter);
4121 	tasklet_kill(&adapter->tasklet);
4122 	do {
4123 		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4124 	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4125 
4126 	dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4127 			 DMA_BIDIRECTIONAL);
4128 	free_page((unsigned long)crq->msgs);
4129 	crq->msgs = NULL;
4130 }
4131 
4132 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4133 {
4134 	struct ibmvnic_crq_queue *crq = &adapter->crq;
4135 	struct device *dev = &adapter->vdev->dev;
4136 	struct vio_dev *vdev = adapter->vdev;
4137 	int rc, retrc = -ENOMEM;
4138 
4139 	if (crq->msgs)
4140 		return 0;
4141 
4142 	crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4143 	/* Should we allocate more than one page? */
4144 
4145 	if (!crq->msgs)
4146 		return -ENOMEM;
4147 
4148 	crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4149 	crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4150 					DMA_BIDIRECTIONAL);
4151 	if (dma_mapping_error(dev, crq->msg_token))
4152 		goto map_failed;
4153 
4154 	rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4155 				crq->msg_token, PAGE_SIZE);
4156 
4157 	if (rc == H_RESOURCE)
4158 		/* maybe kexecing and resource is busy. try a reset */
4159 		rc = ibmvnic_reset_crq(adapter);
4160 	retrc = rc;
4161 
4162 	if (rc == H_CLOSED) {
4163 		dev_warn(dev, "Partner adapter not ready\n");
4164 	} else if (rc) {
4165 		dev_warn(dev, "Error %d opening adapter\n", rc);
4166 		goto reg_crq_failed;
4167 	}
4168 
4169 	retrc = 0;
4170 
4171 	tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4172 		     (unsigned long)adapter);
4173 
4174 	netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4175 	rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4176 			 adapter);
4177 	if (rc) {
4178 		dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4179 			vdev->irq, rc);
4180 		goto req_irq_failed;
4181 	}
4182 
4183 	rc = vio_enable_interrupts(vdev);
4184 	if (rc) {
4185 		dev_err(dev, "Error %d enabling interrupts\n", rc);
4186 		goto req_irq_failed;
4187 	}
4188 
4189 	crq->cur = 0;
4190 	spin_lock_init(&crq->lock);
4191 
4192 	return retrc;
4193 
4194 req_irq_failed:
4195 	tasklet_kill(&adapter->tasklet);
4196 	do {
4197 		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4198 	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4199 reg_crq_failed:
4200 	dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4201 map_failed:
4202 	free_page((unsigned long)crq->msgs);
4203 	crq->msgs = NULL;
4204 	return retrc;
4205 }
4206 
4207 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4208 {
4209 	struct device *dev = &adapter->vdev->dev;
4210 	unsigned long timeout = msecs_to_jiffies(30000);
4211 	int rc;
4212 
4213 	if (adapter->resetting && !adapter->wait_for_reset) {
4214 		rc = ibmvnic_reset_crq(adapter);
4215 		if (!rc)
4216 			rc = vio_enable_interrupts(adapter->vdev);
4217 	} else {
4218 		rc = init_crq_queue(adapter);
4219 	}
4220 
4221 	if (rc) {
4222 		dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4223 		return rc;
4224 	}
4225 
4226 	adapter->from_passive_init = false;
4227 
4228 	init_completion(&adapter->init_done);
4229 	adapter->init_done_rc = 0;
4230 	ibmvnic_send_crq_init(adapter);
4231 	if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4232 		dev_err(dev, "Initialization sequence timed out\n");
4233 		return -1;
4234 	}
4235 
4236 	if (adapter->init_done_rc) {
4237 		release_crq_queue(adapter);
4238 		return adapter->init_done_rc;
4239 	}
4240 
4241 	if (adapter->from_passive_init) {
4242 		adapter->state = VNIC_OPEN;
4243 		adapter->from_passive_init = false;
4244 		return -1;
4245 	}
4246 
4247 	if (adapter->resetting && !adapter->wait_for_reset)
4248 		rc = reset_sub_crq_queues(adapter);
4249 	else
4250 		rc = init_sub_crqs(adapter);
4251 	if (rc) {
4252 		dev_err(dev, "Initialization of sub crqs failed\n");
4253 		release_crq_queue(adapter);
4254 		return rc;
4255 	}
4256 
4257 	rc = init_sub_crq_irqs(adapter);
4258 	if (rc) {
4259 		dev_err(dev, "Failed to initialize sub crq irqs\n");
4260 		release_crq_queue(adapter);
4261 	}
4262 
4263 	return rc;
4264 }
4265 
4266 static struct device_attribute dev_attr_failover;
4267 
4268 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4269 {
4270 	struct ibmvnic_adapter *adapter;
4271 	struct net_device *netdev;
4272 	unsigned char *mac_addr_p;
4273 	int rc;
4274 
4275 	dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4276 		dev->unit_address);
4277 
4278 	mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4279 							VETH_MAC_ADDR, NULL);
4280 	if (!mac_addr_p) {
4281 		dev_err(&dev->dev,
4282 			"(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4283 			__FILE__, __LINE__);
4284 		return 0;
4285 	}
4286 
4287 	netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4288 				   IBMVNIC_MAX_TX_QUEUES);
4289 	if (!netdev)
4290 		return -ENOMEM;
4291 
4292 	adapter = netdev_priv(netdev);
4293 	adapter->state = VNIC_PROBING;
4294 	dev_set_drvdata(&dev->dev, netdev);
4295 	adapter->vdev = dev;
4296 	adapter->netdev = netdev;
4297 
4298 	ether_addr_copy(adapter->mac_addr, mac_addr_p);
4299 	ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4300 	netdev->irq = dev->irq;
4301 	netdev->netdev_ops = &ibmvnic_netdev_ops;
4302 	netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4303 	SET_NETDEV_DEV(netdev, &dev->dev);
4304 
4305 	spin_lock_init(&adapter->stats_lock);
4306 
4307 	INIT_LIST_HEAD(&adapter->errors);
4308 	spin_lock_init(&adapter->error_list_lock);
4309 
4310 	INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4311 	INIT_LIST_HEAD(&adapter->rwi_list);
4312 	mutex_init(&adapter->reset_lock);
4313 	mutex_init(&adapter->rwi_lock);
4314 	adapter->resetting = false;
4315 
4316 	adapter->mac_change_pending = false;
4317 
4318 	do {
4319 		rc = ibmvnic_init(adapter);
4320 		if (rc && rc != EAGAIN)
4321 			goto ibmvnic_init_fail;
4322 	} while (rc == EAGAIN);
4323 
4324 	netdev->mtu = adapter->req_mtu - ETH_HLEN;
4325 	netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4326 	netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4327 
4328 	rc = device_create_file(&dev->dev, &dev_attr_failover);
4329 	if (rc)
4330 		goto ibmvnic_init_fail;
4331 
4332 	netif_carrier_off(netdev);
4333 	rc = register_netdev(netdev);
4334 	if (rc) {
4335 		dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4336 		goto ibmvnic_register_fail;
4337 	}
4338 	dev_info(&dev->dev, "ibmvnic registered\n");
4339 
4340 	adapter->state = VNIC_PROBED;
4341 
4342 	adapter->wait_for_reset = false;
4343 
4344 	return 0;
4345 
4346 ibmvnic_register_fail:
4347 	device_remove_file(&dev->dev, &dev_attr_failover);
4348 
4349 ibmvnic_init_fail:
4350 	release_sub_crqs(adapter);
4351 	release_crq_queue(adapter);
4352 	free_netdev(netdev);
4353 
4354 	return rc;
4355 }
4356 
4357 static int ibmvnic_remove(struct vio_dev *dev)
4358 {
4359 	struct net_device *netdev = dev_get_drvdata(&dev->dev);
4360 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4361 
4362 	adapter->state = VNIC_REMOVING;
4363 	unregister_netdev(netdev);
4364 	mutex_lock(&adapter->reset_lock);
4365 
4366 	release_resources(adapter);
4367 	release_sub_crqs(adapter);
4368 	release_crq_queue(adapter);
4369 
4370 	adapter->state = VNIC_REMOVED;
4371 
4372 	mutex_unlock(&adapter->reset_lock);
4373 	device_remove_file(&dev->dev, &dev_attr_failover);
4374 	free_netdev(netdev);
4375 	dev_set_drvdata(&dev->dev, NULL);
4376 
4377 	return 0;
4378 }
4379 
4380 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4381 			      const char *buf, size_t count)
4382 {
4383 	struct net_device *netdev = dev_get_drvdata(dev);
4384 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4385 	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4386 	__be64 session_token;
4387 	long rc;
4388 
4389 	if (!sysfs_streq(buf, "1"))
4390 		return -EINVAL;
4391 
4392 	rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4393 			 H_GET_SESSION_TOKEN, 0, 0, 0);
4394 	if (rc) {
4395 		netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4396 			   rc);
4397 		return -EINVAL;
4398 	}
4399 
4400 	session_token = (__be64)retbuf[0];
4401 	netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4402 		   be64_to_cpu(session_token));
4403 	rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4404 				H_SESSION_ERR_DETECTED, session_token, 0, 0);
4405 	if (rc) {
4406 		netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4407 			   rc);
4408 		return -EINVAL;
4409 	}
4410 
4411 	return count;
4412 }
4413 
4414 static DEVICE_ATTR(failover, 0200, NULL, failover_store);
4415 
4416 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4417 {
4418 	struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4419 	struct ibmvnic_adapter *adapter;
4420 	struct iommu_table *tbl;
4421 	unsigned long ret = 0;
4422 	int i;
4423 
4424 	tbl = get_iommu_table_base(&vdev->dev);
4425 
4426 	/* netdev inits at probe time along with the structures we need below*/
4427 	if (!netdev)
4428 		return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4429 
4430 	adapter = netdev_priv(netdev);
4431 
4432 	ret += PAGE_SIZE; /* the crq message queue */
4433 	ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4434 
4435 	for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4436 		ret += 4 * PAGE_SIZE; /* the scrq message queue */
4437 
4438 	for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4439 	     i++)
4440 		ret += adapter->rx_pool[i].size *
4441 		    IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4442 
4443 	return ret;
4444 }
4445 
4446 static int ibmvnic_resume(struct device *dev)
4447 {
4448 	struct net_device *netdev = dev_get_drvdata(dev);
4449 	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4450 
4451 	if (adapter->state != VNIC_OPEN)
4452 		return 0;
4453 
4454 	tasklet_schedule(&adapter->tasklet);
4455 
4456 	return 0;
4457 }
4458 
4459 static const struct vio_device_id ibmvnic_device_table[] = {
4460 	{"network", "IBM,vnic"},
4461 	{"", "" }
4462 };
4463 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4464 
4465 static const struct dev_pm_ops ibmvnic_pm_ops = {
4466 	.resume = ibmvnic_resume
4467 };
4468 
4469 static struct vio_driver ibmvnic_driver = {
4470 	.id_table       = ibmvnic_device_table,
4471 	.probe          = ibmvnic_probe,
4472 	.remove         = ibmvnic_remove,
4473 	.get_desired_dma = ibmvnic_get_desired_dma,
4474 	.name		= ibmvnic_driver_name,
4475 	.pm		= &ibmvnic_pm_ops,
4476 };
4477 
4478 /* module functions */
4479 static int __init ibmvnic_module_init(void)
4480 {
4481 	pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4482 		IBMVNIC_DRIVER_VERSION);
4483 
4484 	return vio_register_driver(&ibmvnic_driver);
4485 }
4486 
4487 static void __exit ibmvnic_module_exit(void)
4488 {
4489 	vio_unregister_driver(&ibmvnic_driver);
4490 }
4491 
4492 module_init(ibmvnic_module_init);
4493 module_exit(ibmvnic_module_exit);
4494