1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright IBM Corp. 2007, 2009
10 #define KMSG_COMPONENT "qeth"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13 #include <linux/compat.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/kernel.h>
19 #include <linux/log2.h>
21 #include <linux/tcp.h>
22 #include <linux/mii.h>
24 #include <linux/kthread.h>
25 #include <linux/slab.h>
26 #include <linux/if_vlan.h>
27 #include <linux/netdevice.h>
28 #include <linux/netdev_features.h>
29 #include <linux/rcutree.h>
30 #include <linux/skbuff.h>
31 #include <linux/vmalloc.h>
33 #include <net/iucv/af_iucv.h>
34 #include <net/dsfield.h>
36 #include <asm/ebcdic.h>
37 #include <asm/chpid.h>
39 #include <asm/sysinfo.h>
42 #include <asm/ccwdev.h>
43 #include <asm/cpcmd.h>
45 #include "qeth_core.h"
47 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
48 /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
50 [QETH_DBF_SETUP] = {"qeth_setup",
51 8, 1, 8, 5, &debug_hex_ascii_view, NULL},
52 [QETH_DBF_MSG] = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
53 &debug_sprintf_view, NULL},
54 [QETH_DBF_CTRL] = {"qeth_control",
55 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
57 EXPORT_SYMBOL_GPL(qeth_dbf);
59 struct kmem_cache *qeth_core_header_cache;
60 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
61 static struct kmem_cache *qeth_qdio_outbuf_cache;
63 static struct device *qeth_core_root_dev;
64 static struct dentry *qeth_debugfs_root;
65 static struct lock_class_key qdio_out_skb_queue_key;
67 static void qeth_issue_next_read_cb(struct qeth_card *card,
68 struct qeth_cmd_buffer *iob,
69 unsigned int data_length);
70 static int qeth_qdio_establish(struct qeth_card *);
71 static void qeth_free_qdio_queues(struct qeth_card *card);
72 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
73 struct qeth_qdio_out_buffer *buf,
74 enum iucv_tx_notify notification);
75 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
77 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
79 static void qeth_close_dev_handler(struct work_struct *work)
81 struct qeth_card *card;
83 card = container_of(work, struct qeth_card, close_dev_work);
84 QETH_CARD_TEXT(card, 2, "cldevhdl");
85 ccwgroup_set_offline(card->gdev);
88 static const char *qeth_get_cardname(struct qeth_card *card)
90 if (IS_VM_NIC(card)) {
91 switch (card->info.type) {
92 case QETH_CARD_TYPE_OSD:
93 return " Virtual NIC QDIO";
94 case QETH_CARD_TYPE_IQD:
95 return " Virtual NIC Hiper";
96 case QETH_CARD_TYPE_OSM:
97 return " Virtual NIC QDIO - OSM";
98 case QETH_CARD_TYPE_OSX:
99 return " Virtual NIC QDIO - OSX";
104 switch (card->info.type) {
105 case QETH_CARD_TYPE_OSD:
106 return " OSD Express";
107 case QETH_CARD_TYPE_IQD:
108 return " HiperSockets";
109 case QETH_CARD_TYPE_OSN:
111 case QETH_CARD_TYPE_OSM:
113 case QETH_CARD_TYPE_OSX:
122 /* max length to be returned: 14 */
123 const char *qeth_get_cardname_short(struct qeth_card *card)
125 if (IS_VM_NIC(card)) {
126 switch (card->info.type) {
127 case QETH_CARD_TYPE_OSD:
128 return "Virt.NIC QDIO";
129 case QETH_CARD_TYPE_IQD:
130 return "Virt.NIC Hiper";
131 case QETH_CARD_TYPE_OSM:
132 return "Virt.NIC OSM";
133 case QETH_CARD_TYPE_OSX:
134 return "Virt.NIC OSX";
139 switch (card->info.type) {
140 case QETH_CARD_TYPE_OSD:
141 switch (card->info.link_type) {
142 case QETH_LINK_TYPE_FAST_ETH:
144 case QETH_LINK_TYPE_HSTR:
146 case QETH_LINK_TYPE_GBIT_ETH:
148 case QETH_LINK_TYPE_10GBIT_ETH:
150 case QETH_LINK_TYPE_25GBIT_ETH:
152 case QETH_LINK_TYPE_LANE_ETH100:
153 return "OSD_FE_LANE";
154 case QETH_LINK_TYPE_LANE_TR:
155 return "OSD_TR_LANE";
156 case QETH_LINK_TYPE_LANE_ETH1000:
157 return "OSD_GbE_LANE";
158 case QETH_LINK_TYPE_LANE:
159 return "OSD_ATM_LANE";
161 return "OSD_Express";
163 case QETH_CARD_TYPE_IQD:
164 return "HiperSockets";
165 case QETH_CARD_TYPE_OSN:
167 case QETH_CARD_TYPE_OSM:
169 case QETH_CARD_TYPE_OSX:
178 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
179 int clear_start_mask)
183 spin_lock_irqsave(&card->thread_mask_lock, flags);
184 card->thread_allowed_mask = threads;
185 if (clear_start_mask)
186 card->thread_start_mask &= threads;
187 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
188 wake_up(&card->wait_q);
190 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
192 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
197 spin_lock_irqsave(&card->thread_mask_lock, flags);
198 rc = (card->thread_running_mask & threads);
199 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
202 EXPORT_SYMBOL_GPL(qeth_threads_running);
204 void qeth_clear_working_pool_list(struct qeth_card *card)
206 struct qeth_buffer_pool_entry *pool_entry, *tmp;
208 QETH_CARD_TEXT(card, 5, "clwrklst");
209 list_for_each_entry_safe(pool_entry, tmp,
210 &card->qdio.in_buf_pool.entry_list, list){
211 list_del(&pool_entry->list);
214 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
216 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
220 for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
221 if (entry->elements[i])
222 __free_page(entry->elements[i]);
228 static void qeth_free_buffer_pool(struct qeth_card *card)
230 struct qeth_buffer_pool_entry *entry, *tmp;
232 list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
234 list_del(&entry->init_list);
235 qeth_free_pool_entry(entry);
239 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
241 struct qeth_buffer_pool_entry *entry;
244 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
248 for (i = 0; i < pages; i++) {
249 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
251 if (!entry->elements[i]) {
252 qeth_free_pool_entry(entry);
260 static int qeth_alloc_buffer_pool(struct qeth_card *card)
262 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
265 QETH_CARD_TEXT(card, 5, "alocpool");
266 for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
267 struct qeth_buffer_pool_entry *entry;
269 entry = qeth_alloc_pool_entry(buf_elements);
271 qeth_free_buffer_pool(card);
275 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
280 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
282 unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
283 struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
284 struct qeth_buffer_pool_entry *entry, *tmp;
285 int delta = count - pool->buf_count;
288 QETH_CARD_TEXT(card, 2, "realcbp");
290 /* Defer until queue is allocated: */
291 if (!card->qdio.in_q)
294 /* Remove entries from the pool: */
296 entry = list_first_entry(&pool->entry_list,
297 struct qeth_buffer_pool_entry,
299 list_del(&entry->init_list);
300 qeth_free_pool_entry(entry);
305 /* Allocate additional entries: */
307 entry = qeth_alloc_pool_entry(buf_elements);
309 list_for_each_entry_safe(entry, tmp, &entries,
311 list_del(&entry->init_list);
312 qeth_free_pool_entry(entry);
318 list_add(&entry->init_list, &entries);
323 list_splice(&entries, &pool->entry_list);
326 card->qdio.in_buf_pool.buf_count = count;
327 pool->buf_count = count;
330 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
332 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
337 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
341 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
343 struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
349 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
354 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
355 q->bufs[i].buffer = q->qdio_bufs[i];
357 QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
361 static int qeth_cq_init(struct qeth_card *card)
365 if (card->options.cq == QETH_CQ_ENABLED) {
366 QETH_CARD_TEXT(card, 2, "cqinit");
367 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
368 QDIO_MAX_BUFFERS_PER_Q);
369 card->qdio.c_q->next_buf_to_init = 127;
370 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
371 card->qdio.no_in_queues - 1, 0,
374 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
383 static int qeth_alloc_cq(struct qeth_card *card)
387 if (card->options.cq == QETH_CQ_ENABLED) {
389 struct qdio_outbuf_state *outbuf_states;
391 QETH_CARD_TEXT(card, 2, "cqon");
392 card->qdio.c_q = qeth_alloc_qdio_queue();
393 if (!card->qdio.c_q) {
397 card->qdio.no_in_queues = 2;
398 card->qdio.out_bufstates =
399 kcalloc(card->qdio.no_out_queues *
400 QDIO_MAX_BUFFERS_PER_Q,
401 sizeof(struct qdio_outbuf_state),
403 outbuf_states = card->qdio.out_bufstates;
404 if (outbuf_states == NULL) {
408 for (i = 0; i < card->qdio.no_out_queues; ++i) {
409 card->qdio.out_qs[i]->bufstates = outbuf_states;
410 outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
413 QETH_CARD_TEXT(card, 2, "nocq");
414 card->qdio.c_q = NULL;
415 card->qdio.no_in_queues = 1;
417 QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
422 qeth_free_qdio_queue(card->qdio.c_q);
423 card->qdio.c_q = NULL;
425 dev_err(&card->gdev->dev, "Failed to create completion queue\n");
429 static void qeth_free_cq(struct qeth_card *card)
431 if (card->qdio.c_q) {
432 --card->qdio.no_in_queues;
433 qeth_free_qdio_queue(card->qdio.c_q);
434 card->qdio.c_q = NULL;
436 kfree(card->qdio.out_bufstates);
437 card->qdio.out_bufstates = NULL;
440 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
443 enum iucv_tx_notify n;
447 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
453 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
454 TX_NOTIFY_UNREACHABLE;
457 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
458 TX_NOTIFY_GENERALERROR;
465 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
468 if (q->card->options.cq != QETH_CQ_ENABLED)
471 if (q->bufs[bidx]->next_pending != NULL) {
472 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
473 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
476 if (forced_cleanup ||
477 atomic_read(&c->state) ==
478 QETH_QDIO_BUF_HANDLED_DELAYED) {
479 struct qeth_qdio_out_buffer *f = c;
480 QETH_CARD_TEXT(f->q->card, 5, "fp");
481 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
482 /* release here to avoid interleaving between
483 outbound tasklet and inbound tasklet
484 regarding notifications and lifecycle */
485 qeth_tx_complete_buf(c, forced_cleanup, 0);
488 WARN_ON_ONCE(head->next_pending != f);
489 head->next_pending = c;
490 kmem_cache_free(qeth_qdio_outbuf_cache, f);
498 if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
499 QETH_QDIO_BUF_HANDLED_DELAYED)) {
500 /* for recovery situations */
501 qeth_init_qdio_out_buf(q, bidx);
502 QETH_CARD_TEXT(q->card, 2, "clprecov");
507 static void qeth_qdio_handle_aob(struct qeth_card *card,
508 unsigned long phys_aob_addr)
511 struct qeth_qdio_out_buffer *buffer;
512 enum iucv_tx_notify notification;
515 aob = (struct qaob *) phys_to_virt(phys_aob_addr);
516 QETH_CARD_TEXT(card, 5, "haob");
517 QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
518 buffer = (struct qeth_qdio_out_buffer *) aob->user1;
519 QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
521 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
522 QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
523 notification = TX_NOTIFY_OK;
525 WARN_ON_ONCE(atomic_read(&buffer->state) !=
526 QETH_QDIO_BUF_PENDING);
527 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
528 notification = TX_NOTIFY_DELAYED_OK;
531 if (aob->aorc != 0) {
532 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
533 notification = qeth_compute_cq_notification(aob->aorc, 1);
535 qeth_notify_skbs(buffer->q, buffer, notification);
537 /* Free dangling allocations. The attached skbs are handled by
538 * qeth_cleanup_handled_pending().
541 i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
543 void *data = phys_to_virt(aob->sba[i]);
545 if (data && buffer->is_header[i])
546 kmem_cache_free(qeth_core_header_cache, data);
548 atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
550 qdio_release_aob(aob);
553 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
556 ccw->cmd_code = cmd_code;
557 ccw->flags = flags | CCW_FLAG_SLI;
559 ccw->cda = (__u32) __pa(data);
562 static int __qeth_issue_next_read(struct qeth_card *card)
564 struct qeth_cmd_buffer *iob = card->read_cmd;
565 struct qeth_channel *channel = iob->channel;
566 struct ccw1 *ccw = __ccw_from_cmd(iob);
569 QETH_CARD_TEXT(card, 5, "issnxrd");
570 if (channel->state != CH_STATE_UP)
573 memset(iob->data, 0, iob->length);
574 qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
575 iob->callback = qeth_issue_next_read_cb;
576 /* keep the cmd alive after completion: */
579 QETH_CARD_TEXT(card, 6, "noirqpnd");
580 rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
582 channel->active_cmd = iob;
584 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
585 rc, CARD_DEVID(card));
586 qeth_unlock_channel(card, channel);
588 card->read_or_write_problem = 1;
589 qeth_schedule_recovery(card);
594 static int qeth_issue_next_read(struct qeth_card *card)
598 spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
599 ret = __qeth_issue_next_read(card);
600 spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
605 static void qeth_enqueue_cmd(struct qeth_card *card,
606 struct qeth_cmd_buffer *iob)
608 spin_lock_irq(&card->lock);
609 list_add_tail(&iob->list, &card->cmd_waiter_list);
610 spin_unlock_irq(&card->lock);
613 static void qeth_dequeue_cmd(struct qeth_card *card,
614 struct qeth_cmd_buffer *iob)
616 spin_lock_irq(&card->lock);
617 list_del(&iob->list);
618 spin_unlock_irq(&card->lock);
621 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
624 complete(&iob->done);
626 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
628 static void qeth_flush_local_addrs4(struct qeth_card *card)
630 struct qeth_local_addr *addr;
631 struct hlist_node *tmp;
634 spin_lock_irq(&card->local_addrs4_lock);
635 hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
636 hash_del_rcu(&addr->hnode);
637 kfree_rcu(addr, rcu);
639 spin_unlock_irq(&card->local_addrs4_lock);
642 static void qeth_flush_local_addrs6(struct qeth_card *card)
644 struct qeth_local_addr *addr;
645 struct hlist_node *tmp;
648 spin_lock_irq(&card->local_addrs6_lock);
649 hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
650 hash_del_rcu(&addr->hnode);
651 kfree_rcu(addr, rcu);
653 spin_unlock_irq(&card->local_addrs6_lock);
656 void qeth_flush_local_addrs(struct qeth_card *card)
658 qeth_flush_local_addrs4(card);
659 qeth_flush_local_addrs6(card);
661 EXPORT_SYMBOL_GPL(qeth_flush_local_addrs);
663 static void qeth_add_local_addrs4(struct qeth_card *card,
664 struct qeth_ipacmd_local_addrs4 *cmd)
668 if (cmd->addr_length !=
669 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
670 dev_err_ratelimited(&card->gdev->dev,
671 "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
676 spin_lock(&card->local_addrs4_lock);
677 for (i = 0; i < cmd->count; i++) {
678 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
679 struct qeth_local_addr *addr;
680 bool duplicate = false;
682 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
683 if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
692 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
694 dev_err(&card->gdev->dev,
695 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
696 &cmd->addrs[i].addr);
700 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
701 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
703 spin_unlock(&card->local_addrs4_lock);
706 static void qeth_add_local_addrs6(struct qeth_card *card,
707 struct qeth_ipacmd_local_addrs6 *cmd)
711 if (cmd->addr_length !=
712 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
713 dev_err_ratelimited(&card->gdev->dev,
714 "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
719 spin_lock(&card->local_addrs6_lock);
720 for (i = 0; i < cmd->count; i++) {
721 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
722 struct qeth_local_addr *addr;
723 bool duplicate = false;
725 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
726 if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
735 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
737 dev_err(&card->gdev->dev,
738 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
739 &cmd->addrs[i].addr);
743 addr->addr = cmd->addrs[i].addr;
744 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
746 spin_unlock(&card->local_addrs6_lock);
749 static void qeth_del_local_addrs4(struct qeth_card *card,
750 struct qeth_ipacmd_local_addrs4 *cmd)
754 if (cmd->addr_length !=
755 sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
756 dev_err_ratelimited(&card->gdev->dev,
757 "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
762 spin_lock(&card->local_addrs4_lock);
763 for (i = 0; i < cmd->count; i++) {
764 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
765 unsigned int key = ipv4_addr_hash(addr->addr);
766 struct qeth_local_addr *tmp;
768 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
769 if (tmp->addr.s6_addr32[3] == addr->addr) {
770 hash_del_rcu(&tmp->hnode);
776 spin_unlock(&card->local_addrs4_lock);
779 static void qeth_del_local_addrs6(struct qeth_card *card,
780 struct qeth_ipacmd_local_addrs6 *cmd)
784 if (cmd->addr_length !=
785 sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
786 dev_err_ratelimited(&card->gdev->dev,
787 "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
792 spin_lock(&card->local_addrs6_lock);
793 for (i = 0; i < cmd->count; i++) {
794 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
795 u32 key = ipv6_addr_hash(&addr->addr);
796 struct qeth_local_addr *tmp;
798 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
799 if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
800 hash_del_rcu(&tmp->hnode);
806 spin_unlock(&card->local_addrs6_lock);
809 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
812 struct qeth_local_addr *tmp;
813 bool is_local = false;
817 if (hash_empty(card->local_addrs4))
821 next_hop = qeth_next_hop_v4_rcu(skb, qeth_dst_check_rcu(skb, 4));
822 key = ipv4_addr_hash(next_hop);
824 hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
825 if (tmp->addr.s6_addr32[3] == next_hop) {
835 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
838 struct qeth_local_addr *tmp;
839 struct in6_addr *next_hop;
840 bool is_local = false;
843 if (hash_empty(card->local_addrs6))
847 next_hop = qeth_next_hop_v6_rcu(skb, qeth_dst_check_rcu(skb, 6));
848 key = ipv6_addr_hash(next_hop);
850 hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
851 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
861 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
863 struct qeth_card *card = m->private;
864 struct qeth_local_addr *tmp;
868 hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
869 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
870 hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
871 seq_printf(m, "%pI6c\n", &tmp->addr);
877 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
879 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
880 struct qeth_card *card)
882 const char *ipa_name;
883 int com = cmd->hdr.command;
884 ipa_name = qeth_get_ipa_cmd_name(com);
887 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
888 ipa_name, com, CARD_DEVID(card), rc,
889 qeth_get_ipa_msg(rc));
891 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
892 ipa_name, com, CARD_DEVID(card));
895 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
896 struct qeth_ipa_cmd *cmd)
898 QETH_CARD_TEXT(card, 5, "chkipad");
900 if (IS_IPA_REPLY(cmd)) {
901 if (cmd->hdr.command != IPA_CMD_SETCCID &&
902 cmd->hdr.command != IPA_CMD_DELCCID &&
903 cmd->hdr.command != IPA_CMD_MODCCID &&
904 cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
905 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
909 /* handle unsolicited event: */
910 switch (cmd->hdr.command) {
911 case IPA_CMD_STOPLAN:
912 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
913 dev_err(&card->gdev->dev,
914 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
915 QETH_CARD_IFNAME(card));
916 schedule_work(&card->close_dev_work);
918 dev_warn(&card->gdev->dev,
919 "The link for interface %s on CHPID 0x%X failed\n",
920 QETH_CARD_IFNAME(card), card->info.chpid);
921 qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
922 netif_carrier_off(card->dev);
925 case IPA_CMD_STARTLAN:
926 dev_info(&card->gdev->dev,
927 "The link for %s on CHPID 0x%X has been restored\n",
928 QETH_CARD_IFNAME(card), card->info.chpid);
929 if (card->info.hwtrap)
930 card->info.hwtrap = 2;
931 qeth_schedule_recovery(card);
933 case IPA_CMD_SETBRIDGEPORT_IQD:
934 case IPA_CMD_SETBRIDGEPORT_OSA:
935 case IPA_CMD_ADDRESS_CHANGE_NOTIF:
936 if (card->discipline->control_event_handler(card, cmd))
939 case IPA_CMD_MODCCID:
941 case IPA_CMD_REGISTER_LOCAL_ADDR:
942 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
943 qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
944 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
945 qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
947 QETH_CARD_TEXT(card, 3, "irla");
949 case IPA_CMD_UNREGISTER_LOCAL_ADDR:
950 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
951 qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
952 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
953 qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
955 QETH_CARD_TEXT(card, 3, "urla");
958 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
963 void qeth_clear_ipacmd_list(struct qeth_card *card)
965 struct qeth_cmd_buffer *iob;
968 QETH_CARD_TEXT(card, 4, "clipalst");
970 spin_lock_irqsave(&card->lock, flags);
971 list_for_each_entry(iob, &card->cmd_waiter_list, list)
972 qeth_notify_cmd(iob, -EIO);
973 spin_unlock_irqrestore(&card->lock, flags);
975 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
977 static int qeth_check_idx_response(struct qeth_card *card,
978 unsigned char *buffer)
980 QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
981 if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
982 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
984 QETH_CARD_TEXT(card, 2, "ckidxres");
985 QETH_CARD_TEXT(card, 2, " idxterm");
986 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
987 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
988 buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
989 dev_err(&card->gdev->dev,
990 "The device does not support the configured transport mode\n");
991 return -EPROTONOSUPPORT;
998 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
1000 if (refcount_dec_and_test(&iob->ref_count)) {
1005 EXPORT_SYMBOL_GPL(qeth_put_cmd);
1007 static void qeth_release_buffer_cb(struct qeth_card *card,
1008 struct qeth_cmd_buffer *iob,
1009 unsigned int data_length)
1014 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
1016 qeth_notify_cmd(iob, rc);
1020 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
1021 unsigned int length, unsigned int ccws,
1024 struct qeth_cmd_buffer *iob;
1026 if (length > QETH_BUFSIZE)
1029 iob = kzalloc(sizeof(*iob), GFP_KERNEL);
1033 iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
1034 GFP_KERNEL | GFP_DMA);
1040 init_completion(&iob->done);
1041 spin_lock_init(&iob->lock);
1042 INIT_LIST_HEAD(&iob->list);
1043 refcount_set(&iob->ref_count, 1);
1044 iob->channel = channel;
1045 iob->timeout = timeout;
1046 iob->length = length;
1049 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
1051 static void qeth_issue_next_read_cb(struct qeth_card *card,
1052 struct qeth_cmd_buffer *iob,
1053 unsigned int data_length)
1055 struct qeth_cmd_buffer *request = NULL;
1056 struct qeth_ipa_cmd *cmd = NULL;
1057 struct qeth_reply *reply = NULL;
1058 struct qeth_cmd_buffer *tmp;
1059 unsigned long flags;
1062 QETH_CARD_TEXT(card, 4, "sndctlcb");
1063 rc = qeth_check_idx_response(card, iob->data);
1068 qeth_schedule_recovery(card);
1071 qeth_clear_ipacmd_list(card);
1075 cmd = __ipa_reply(iob);
1077 cmd = qeth_check_ipa_data(card, cmd);
1080 if (IS_OSN(card) && card->osn_info.assist_cb &&
1081 cmd->hdr.command != IPA_CMD_STARTLAN) {
1082 card->osn_info.assist_cb(card->dev, cmd);
1087 /* match against pending cmd requests */
1088 spin_lock_irqsave(&card->lock, flags);
1089 list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
1090 if (tmp->match && tmp->match(tmp, iob)) {
1092 /* take the object outside the lock */
1093 qeth_get_cmd(request);
1097 spin_unlock_irqrestore(&card->lock, flags);
1102 reply = &request->reply;
1103 if (!reply->callback) {
1108 spin_lock_irqsave(&request->lock, flags);
1110 /* Bail out when the requestor has already left: */
1113 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1114 (unsigned long)iob);
1115 spin_unlock_irqrestore(&request->lock, flags);
1119 qeth_notify_cmd(request, rc);
1120 qeth_put_cmd(request);
1122 memcpy(&card->seqno.pdu_hdr_ack,
1123 QETH_PDU_HEADER_SEQ_NO(iob->data),
1124 QETH_SEQ_NO_LENGTH);
1125 __qeth_issue_next_read(card);
1130 static int qeth_set_thread_start_bit(struct qeth_card *card,
1131 unsigned long thread)
1133 unsigned long flags;
1136 spin_lock_irqsave(&card->thread_mask_lock, flags);
1137 if (!(card->thread_allowed_mask & thread))
1139 else if (card->thread_start_mask & thread)
1142 card->thread_start_mask |= thread;
1143 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1148 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1149 unsigned long thread)
1151 unsigned long flags;
1153 spin_lock_irqsave(&card->thread_mask_lock, flags);
1154 card->thread_start_mask &= ~thread;
1155 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1156 wake_up(&card->wait_q);
1159 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1160 unsigned long thread)
1162 unsigned long flags;
1164 spin_lock_irqsave(&card->thread_mask_lock, flags);
1165 card->thread_running_mask &= ~thread;
1166 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1167 wake_up_all(&card->wait_q);
1170 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1172 unsigned long flags;
1175 spin_lock_irqsave(&card->thread_mask_lock, flags);
1176 if (card->thread_start_mask & thread) {
1177 if ((card->thread_allowed_mask & thread) &&
1178 !(card->thread_running_mask & thread)) {
1180 card->thread_start_mask &= ~thread;
1181 card->thread_running_mask |= thread;
1185 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1189 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1193 wait_event(card->wait_q,
1194 (rc = __qeth_do_run_thread(card, thread)) >= 0);
1198 int qeth_schedule_recovery(struct qeth_card *card)
1202 QETH_CARD_TEXT(card, 2, "startrec");
1204 rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1206 schedule_work(&card->kernel_thread_starter);
1211 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1217 sense = (char *) irb->ecw;
1218 cstat = irb->scsw.cmd.cstat;
1219 dstat = irb->scsw.cmd.dstat;
1221 if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1222 SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1223 SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1224 QETH_CARD_TEXT(card, 2, "CGENCHK");
1225 dev_warn(&cdev->dev, "The qeth device driver "
1226 "failed to recover an error on the device\n");
1227 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1228 CCW_DEVID(cdev), dstat, cstat);
1229 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1234 if (dstat & DEV_STAT_UNIT_CHECK) {
1235 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1236 SENSE_RESETTING_EVENT_FLAG) {
1237 QETH_CARD_TEXT(card, 2, "REVIND");
1240 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1241 SENSE_COMMAND_REJECT_FLAG) {
1242 QETH_CARD_TEXT(card, 2, "CMDREJi");
1245 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1246 QETH_CARD_TEXT(card, 2, "AFFE");
1249 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1250 QETH_CARD_TEXT(card, 2, "ZEROSEN");
1253 QETH_CARD_TEXT(card, 2, "DGENCHK");
1259 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1265 switch (PTR_ERR(irb)) {
1267 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1269 QETH_CARD_TEXT(card, 2, "ckirberr");
1270 QETH_CARD_TEXT_(card, 2, " rc%d", -EIO);
1273 dev_warn(&cdev->dev, "A hardware operation timed out"
1274 " on the device\n");
1275 QETH_CARD_TEXT(card, 2, "ckirberr");
1276 QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
1279 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1280 PTR_ERR(irb), CCW_DEVID(cdev));
1281 QETH_CARD_TEXT(card, 2, "ckirberr");
1282 QETH_CARD_TEXT(card, 2, " rc???");
1283 return PTR_ERR(irb);
1287 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1292 struct qeth_cmd_buffer *iob = NULL;
1293 struct ccwgroup_device *gdev;
1294 struct qeth_channel *channel;
1295 struct qeth_card *card;
1297 /* while we hold the ccwdev lock, this stays valid: */
1298 gdev = dev_get_drvdata(&cdev->dev);
1299 card = dev_get_drvdata(&gdev->dev);
1301 QETH_CARD_TEXT(card, 5, "irq");
1303 if (card->read.ccwdev == cdev) {
1304 channel = &card->read;
1305 QETH_CARD_TEXT(card, 5, "read");
1306 } else if (card->write.ccwdev == cdev) {
1307 channel = &card->write;
1308 QETH_CARD_TEXT(card, 5, "write");
1310 channel = &card->data;
1311 QETH_CARD_TEXT(card, 5, "data");
1315 QETH_CARD_TEXT(card, 5, "irqunsol");
1316 } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1317 QETH_CARD_TEXT(card, 5, "irqunexp");
1320 "Received IRQ with intparm %lx, expected %px\n",
1321 intparm, channel->active_cmd);
1322 if (channel->active_cmd)
1323 qeth_cancel_cmd(channel->active_cmd, -EIO);
1325 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1328 channel->active_cmd = NULL;
1329 qeth_unlock_channel(card, channel);
1331 rc = qeth_check_irb_error(card, cdev, irb);
1333 /* IO was terminated, free its resources. */
1335 qeth_cancel_cmd(iob, rc);
1339 if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1340 channel->state = CH_STATE_STOPPED;
1341 wake_up(&card->wait_q);
1344 if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1345 channel->state = CH_STATE_HALTED;
1346 wake_up(&card->wait_q);
1349 if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1350 SCSW_FCTL_HALT_FUNC))) {
1351 qeth_cancel_cmd(iob, -ECANCELED);
1355 cstat = irb->scsw.cmd.cstat;
1356 dstat = irb->scsw.cmd.dstat;
1358 if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1359 (dstat & DEV_STAT_UNIT_CHECK) ||
1361 if (irb->esw.esw0.erw.cons) {
1362 dev_warn(&channel->ccwdev->dev,
1363 "The qeth device driver failed to recover "
1364 "an error on the device\n");
1365 QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1366 CCW_DEVID(channel->ccwdev), cstat,
1368 print_hex_dump(KERN_WARNING, "qeth: irb ",
1369 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1370 print_hex_dump(KERN_WARNING, "qeth: sense data ",
1371 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1374 rc = qeth_get_problem(card, cdev, irb);
1376 card->read_or_write_problem = 1;
1378 qeth_cancel_cmd(iob, rc);
1379 qeth_clear_ipacmd_list(card);
1380 qeth_schedule_recovery(card);
1387 if (irb->scsw.cmd.count > iob->length) {
1388 qeth_cancel_cmd(iob, -EIO);
1392 iob->callback(card, iob,
1393 iob->length - irb->scsw.cmd.count);
1397 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1398 struct qeth_qdio_out_buffer *buf,
1399 enum iucv_tx_notify notification)
1401 struct sk_buff *skb;
1403 skb_queue_walk(&buf->skb_list, skb) {
1404 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1405 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1406 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1407 iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1411 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1414 struct qeth_qdio_out_q *queue = buf->q;
1415 struct sk_buff *skb;
1417 /* release may never happen from within CQ tasklet scope */
1418 WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1420 if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1421 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1424 if (buf->next_element_to_fill == 0)
1427 QETH_TXQ_STAT_INC(queue, bufs);
1428 QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1430 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1432 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1433 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1436 while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1437 unsigned int bytes = qdisc_pkt_len(skb);
1438 bool is_tso = skb_is_gso(skb);
1439 unsigned int packets;
1441 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1443 if (skb->ip_summed == CHECKSUM_PARTIAL)
1444 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1445 if (skb_is_nonlinear(skb))
1446 QETH_TXQ_STAT_INC(queue, skbs_sg);
1448 QETH_TXQ_STAT_INC(queue, skbs_tso);
1449 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1453 napi_consume_skb(skb, budget);
1457 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1458 struct qeth_qdio_out_buffer *buf,
1459 bool error, int budget)
1463 /* is PCI flag set on buffer? */
1464 if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1465 atomic_dec(&queue->set_pci_flags_count);
1467 qeth_tx_complete_buf(buf, error, budget);
1469 for (i = 0; i < queue->max_elements; ++i) {
1470 void *data = phys_to_virt(buf->buffer->element[i].addr);
1472 if (data && buf->is_header[i])
1473 kmem_cache_free(qeth_core_header_cache, data);
1474 buf->is_header[i] = 0;
1477 qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1478 buf->next_element_to_fill = 0;
1481 atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1484 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1488 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1491 qeth_cleanup_handled_pending(q, j, 1);
1492 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1494 kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1500 void qeth_drain_output_queues(struct qeth_card *card)
1504 QETH_CARD_TEXT(card, 2, "clearqdbf");
1505 /* clear outbound buffers to free skbs */
1506 for (i = 0; i < card->qdio.no_out_queues; ++i) {
1507 if (card->qdio.out_qs[i])
1508 qeth_drain_output_queue(card->qdio.out_qs[i], false);
1511 EXPORT_SYMBOL_GPL(qeth_drain_output_queues);
1513 static int qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1515 unsigned int max = single ? 1 : card->dev->num_tx_queues;
1519 count = IS_VM_NIC(card) ? min(max, card->dev->real_num_tx_queues) : max;
1522 rc = netif_set_real_num_tx_queues(card->dev, count);
1528 if (card->qdio.no_out_queues == max)
1531 if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1532 qeth_free_qdio_queues(card);
1534 if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1535 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1537 card->qdio.no_out_queues = max;
1541 static int qeth_update_from_chp_desc(struct qeth_card *card)
1543 struct ccw_device *ccwdev;
1544 struct channel_path_desc_fmt0 *chp_dsc;
1547 QETH_CARD_TEXT(card, 2, "chp_desc");
1549 ccwdev = card->data.ccwdev;
1550 chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1554 card->info.func_level = 0x4100 + chp_dsc->desc;
1556 if (IS_OSD(card) || IS_OSX(card))
1557 /* CHPP field bit 6 == 1 -> single queue */
1558 rc = qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1561 QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1562 QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1566 static void qeth_init_qdio_info(struct qeth_card *card)
1568 QETH_CARD_TEXT(card, 4, "intqdinf");
1569 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1570 card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1571 card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1574 card->qdio.no_in_queues = 1;
1575 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1577 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1579 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1580 card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1581 INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1582 INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1585 static void qeth_set_initial_options(struct qeth_card *card)
1587 card->options.route4.type = NO_ROUTER;
1588 card->options.route6.type = NO_ROUTER;
1589 card->options.isolation = ISOLATION_MODE_NONE;
1590 card->options.cq = QETH_CQ_DISABLED;
1591 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1594 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1596 unsigned long flags;
1599 spin_lock_irqsave(&card->thread_mask_lock, flags);
1600 QETH_CARD_TEXT_(card, 4, " %02x%02x%02x",
1601 (u8) card->thread_start_mask,
1602 (u8) card->thread_allowed_mask,
1603 (u8) card->thread_running_mask);
1604 rc = (card->thread_start_mask & thread);
1605 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1609 static int qeth_do_reset(void *data);
1610 static void qeth_start_kernel_thread(struct work_struct *work)
1612 struct task_struct *ts;
1613 struct qeth_card *card = container_of(work, struct qeth_card,
1614 kernel_thread_starter);
1615 QETH_CARD_TEXT(card , 2, "strthrd");
1617 if (card->read.state != CH_STATE_UP &&
1618 card->write.state != CH_STATE_UP)
1620 if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1621 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1623 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1624 qeth_clear_thread_running_bit(card,
1625 QETH_RECOVER_THREAD);
1630 static void qeth_buffer_reclaim_work(struct work_struct *);
1631 static void qeth_setup_card(struct qeth_card *card)
1633 QETH_CARD_TEXT(card, 2, "setupcrd");
1635 card->info.type = CARD_RDEV(card)->id.driver_info;
1636 card->state = CARD_STATE_DOWN;
1637 spin_lock_init(&card->lock);
1638 spin_lock_init(&card->thread_mask_lock);
1639 mutex_init(&card->conf_mutex);
1640 mutex_init(&card->discipline_mutex);
1641 INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1642 INIT_LIST_HEAD(&card->cmd_waiter_list);
1643 init_waitqueue_head(&card->wait_q);
1644 qeth_set_initial_options(card);
1645 /* IP address takeover */
1646 INIT_LIST_HEAD(&card->ipato.entries);
1647 qeth_init_qdio_info(card);
1648 INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1649 INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1650 hash_init(card->local_addrs4);
1651 hash_init(card->local_addrs6);
1652 spin_lock_init(&card->local_addrs4_lock);
1653 spin_lock_init(&card->local_addrs6_lock);
1656 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1658 struct qeth_card *card = container_of(slr, struct qeth_card,
1659 qeth_service_level);
1660 if (card->info.mcl_level[0])
1661 seq_printf(m, "qeth: %s firmware level %s\n",
1662 CARD_BUS_ID(card), card->info.mcl_level);
1665 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1667 struct qeth_card *card;
1669 QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1670 card = kzalloc(sizeof(*card), GFP_KERNEL);
1673 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1676 dev_set_drvdata(&gdev->dev, card);
1677 CARD_RDEV(card) = gdev->cdev[0];
1678 CARD_WDEV(card) = gdev->cdev[1];
1679 CARD_DDEV(card) = gdev->cdev[2];
1681 card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1682 dev_name(&gdev->dev));
1683 if (!card->event_wq)
1686 card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1687 if (!card->read_cmd)
1690 card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1692 debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1693 &qeth_debugfs_local_addr_fops);
1695 card->qeth_service_level.seq_print = qeth_core_sl_print;
1696 register_service_level(&card->qeth_service_level);
1700 destroy_workqueue(card->event_wq);
1702 dev_set_drvdata(&gdev->dev, NULL);
1708 static int qeth_clear_channel(struct qeth_card *card,
1709 struct qeth_channel *channel)
1713 QETH_CARD_TEXT(card, 3, "clearch");
1714 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1715 rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1716 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1720 rc = wait_event_interruptible_timeout(card->wait_q,
1721 channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1722 if (rc == -ERESTARTSYS)
1724 if (channel->state != CH_STATE_STOPPED)
1726 channel->state = CH_STATE_DOWN;
1730 static int qeth_halt_channel(struct qeth_card *card,
1731 struct qeth_channel *channel)
1735 QETH_CARD_TEXT(card, 3, "haltch");
1736 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1737 rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1738 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1742 rc = wait_event_interruptible_timeout(card->wait_q,
1743 channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1744 if (rc == -ERESTARTSYS)
1746 if (channel->state != CH_STATE_HALTED)
1751 int qeth_stop_channel(struct qeth_channel *channel)
1753 struct ccw_device *cdev = channel->ccwdev;
1756 rc = ccw_device_set_offline(cdev);
1758 spin_lock_irq(get_ccwdev_lock(cdev));
1759 if (channel->active_cmd) {
1760 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1761 channel->active_cmd);
1762 channel->active_cmd = NULL;
1764 cdev->handler = NULL;
1765 spin_unlock_irq(get_ccwdev_lock(cdev));
1769 EXPORT_SYMBOL_GPL(qeth_stop_channel);
1771 static int qeth_start_channel(struct qeth_channel *channel)
1773 struct ccw_device *cdev = channel->ccwdev;
1776 channel->state = CH_STATE_DOWN;
1777 atomic_set(&channel->irq_pending, 0);
1779 spin_lock_irq(get_ccwdev_lock(cdev));
1780 cdev->handler = qeth_irq;
1781 spin_unlock_irq(get_ccwdev_lock(cdev));
1783 rc = ccw_device_set_online(cdev);
1790 spin_lock_irq(get_ccwdev_lock(cdev));
1791 cdev->handler = NULL;
1792 spin_unlock_irq(get_ccwdev_lock(cdev));
1796 static int qeth_halt_channels(struct qeth_card *card)
1798 int rc1 = 0, rc2 = 0, rc3 = 0;
1800 QETH_CARD_TEXT(card, 3, "haltchs");
1801 rc1 = qeth_halt_channel(card, &card->read);
1802 rc2 = qeth_halt_channel(card, &card->write);
1803 rc3 = qeth_halt_channel(card, &card->data);
1811 static int qeth_clear_channels(struct qeth_card *card)
1813 int rc1 = 0, rc2 = 0, rc3 = 0;
1815 QETH_CARD_TEXT(card, 3, "clearchs");
1816 rc1 = qeth_clear_channel(card, &card->read);
1817 rc2 = qeth_clear_channel(card, &card->write);
1818 rc3 = qeth_clear_channel(card, &card->data);
1826 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1830 QETH_CARD_TEXT(card, 3, "clhacrd");
1833 rc = qeth_halt_channels(card);
1836 return qeth_clear_channels(card);
1839 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1843 QETH_CARD_TEXT(card, 3, "qdioclr");
1844 switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1845 QETH_QDIO_CLEANING)) {
1846 case QETH_QDIO_ESTABLISHED:
1848 rc = qdio_shutdown(CARD_DDEV(card),
1849 QDIO_FLAG_CLEANUP_USING_HALT);
1851 rc = qdio_shutdown(CARD_DDEV(card),
1852 QDIO_FLAG_CLEANUP_USING_CLEAR);
1854 QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1855 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1857 case QETH_QDIO_CLEANING:
1862 rc = qeth_clear_halt_card(card, use_halt);
1864 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1867 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1869 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1871 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1872 struct diag26c_vnic_resp *response = NULL;
1873 struct diag26c_vnic_req *request = NULL;
1874 struct ccw_dev_id id;
1878 QETH_CARD_TEXT(card, 2, "vmlayer");
1880 cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1884 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1885 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1886 if (!request || !response) {
1891 ccw_device_get_id(CARD_RDEV(card), &id);
1892 request->resp_buf_len = sizeof(*response);
1893 request->resp_version = DIAG26C_VERSION6_VM65918;
1894 request->req_format = DIAG26C_VNIC_INFO;
1896 memcpy(&request->sys_name, userid, 8);
1897 request->devno = id.devno;
1899 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1900 rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1901 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1904 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1906 if (request->resp_buf_len < sizeof(*response) ||
1907 response->version != request->resp_version) {
1912 if (response->protocol == VNIC_INFO_PROT_L2)
1913 disc = QETH_DISCIPLINE_LAYER2;
1914 else if (response->protocol == VNIC_INFO_PROT_L3)
1915 disc = QETH_DISCIPLINE_LAYER3;
1921 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1925 /* Determine whether the device requires a specific layer discipline */
1926 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1928 enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1930 if (IS_OSM(card) || IS_OSN(card))
1931 disc = QETH_DISCIPLINE_LAYER2;
1932 else if (IS_VM_NIC(card))
1933 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1934 qeth_vm_detect_layer(card);
1937 case QETH_DISCIPLINE_LAYER2:
1938 QETH_CARD_TEXT(card, 3, "force l2");
1940 case QETH_DISCIPLINE_LAYER3:
1941 QETH_CARD_TEXT(card, 3, "force l3");
1944 QETH_CARD_TEXT(card, 3, "force no");
1950 static void qeth_set_blkt_defaults(struct qeth_card *card)
1952 QETH_CARD_TEXT(card, 2, "cfgblkt");
1954 if (card->info.use_v1_blkt) {
1955 card->info.blkt.time_total = 0;
1956 card->info.blkt.inter_packet = 0;
1957 card->info.blkt.inter_packet_jumbo = 0;
1959 card->info.blkt.time_total = 250;
1960 card->info.blkt.inter_packet = 5;
1961 card->info.blkt.inter_packet_jumbo = 15;
1965 static void qeth_idx_init(struct qeth_card *card)
1967 memset(&card->seqno, 0, sizeof(card->seqno));
1969 card->token.issuer_rm_w = 0x00010103UL;
1970 card->token.cm_filter_w = 0x00010108UL;
1971 card->token.cm_connection_w = 0x0001010aUL;
1972 card->token.ulp_filter_w = 0x0001010bUL;
1973 card->token.ulp_connection_w = 0x0001010dUL;
1975 switch (card->info.type) {
1976 case QETH_CARD_TYPE_IQD:
1977 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1979 case QETH_CARD_TYPE_OSD:
1980 case QETH_CARD_TYPE_OSN:
1981 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1988 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1989 struct qeth_cmd_buffer *iob)
1991 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1992 QETH_SEQ_NO_LENGTH);
1993 if (iob->channel == &card->write)
1994 card->seqno.trans_hdr++;
1997 static int qeth_peer_func_level(int level)
1999 if ((level & 0xff) == 8)
2000 return (level & 0xff) + 0x400;
2001 if (((level >> 8) & 3) == 1)
2002 return (level & 0xff) + 0x200;
2006 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
2007 struct qeth_cmd_buffer *iob)
2009 qeth_idx_finalize_cmd(card, iob);
2011 memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2012 &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2013 card->seqno.pdu_hdr++;
2014 memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2015 &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2017 iob->callback = qeth_release_buffer_cb;
2020 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
2021 struct qeth_cmd_buffer *reply)
2023 /* MPC cmds are issued strictly in sequence. */
2024 return !IS_IPA(reply->data);
2027 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
2029 unsigned int data_length)
2031 struct qeth_cmd_buffer *iob;
2033 iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
2037 memcpy(iob->data, data, data_length);
2038 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
2040 iob->finalize = qeth_mpc_finalize_cmd;
2041 iob->match = qeth_mpc_match_reply;
2046 * qeth_send_control_data() - send control command to the card
2047 * @card: qeth_card structure pointer
2048 * @iob: qeth_cmd_buffer pointer
2049 * @reply_cb: callback function pointer
2050 * @cb_card: pointer to the qeth_card structure
2051 * @cb_reply: pointer to the qeth_reply structure
2052 * @cb_cmd: pointer to the original iob for non-IPA
2053 * commands, or to the qeth_ipa_cmd structure
2054 * for the IPA commands.
2055 * @reply_param: private pointer passed to the callback
2057 * Callback function gets called one or more times, with cb_cmd
2058 * pointing to the response returned by the hardware. Callback
2059 * function must return
2060 * > 0 if more reply blocks are expected,
2061 * 0 if the last or only reply block is received, and
2063 * Callback function can get the value of the reply_param pointer from the
2064 * field 'param' of the structure qeth_reply.
2067 static int qeth_send_control_data(struct qeth_card *card,
2068 struct qeth_cmd_buffer *iob,
2069 int (*reply_cb)(struct qeth_card *cb_card,
2070 struct qeth_reply *cb_reply,
2071 unsigned long cb_cmd),
2074 struct qeth_channel *channel = iob->channel;
2075 struct qeth_reply *reply = &iob->reply;
2076 long timeout = iob->timeout;
2079 QETH_CARD_TEXT(card, 2, "sendctl");
2081 reply->callback = reply_cb;
2082 reply->param = reply_param;
2084 timeout = wait_event_interruptible_timeout(card->wait_q,
2085 qeth_trylock_channel(channel),
2089 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2093 iob->finalize(card, iob);
2094 QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2096 qeth_enqueue_cmd(card, iob);
2098 /* This pairs with iob->callback, and keeps the iob alive after IO: */
2101 QETH_CARD_TEXT(card, 6, "noirqpnd");
2102 spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2103 rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2104 (addr_t) iob, 0, 0, timeout);
2106 channel->active_cmd = iob;
2107 spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2109 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2110 CARD_DEVID(card), rc);
2111 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2112 qeth_dequeue_cmd(card, iob);
2114 qeth_unlock_channel(card, channel);
2118 timeout = wait_for_completion_interruptible_timeout(&iob->done,
2121 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2123 qeth_dequeue_cmd(card, iob);
2126 /* Wait until the callback for a late reply has completed: */
2127 spin_lock_irq(&iob->lock);
2129 /* Zap any callback that's still pending: */
2131 spin_unlock_irq(&iob->lock);
2142 struct qeth_node_desc {
2143 struct node_descriptor nd1;
2144 struct node_descriptor nd2;
2145 struct node_descriptor nd3;
2148 static void qeth_read_conf_data_cb(struct qeth_card *card,
2149 struct qeth_cmd_buffer *iob,
2150 unsigned int data_length)
2152 struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2156 QETH_CARD_TEXT(card, 2, "cfgunit");
2158 if (data_length < sizeof(*nd)) {
2163 card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2164 nd->nd1.plant[1] == _ascebc['M'];
2165 tag = (u8 *)&nd->nd1.tag;
2166 card->info.chpid = tag[0];
2167 card->info.unit_addr2 = tag[1];
2169 tag = (u8 *)&nd->nd2.tag;
2170 card->info.cula = tag[1];
2172 card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2173 nd->nd3.model[1] == 0xF0 &&
2174 nd->nd3.model[2] >= 0xF1 &&
2175 nd->nd3.model[2] <= 0xF4;
2178 qeth_notify_cmd(iob, rc);
2182 static int qeth_read_conf_data(struct qeth_card *card)
2184 struct qeth_channel *channel = &card->data;
2185 struct qeth_cmd_buffer *iob;
2188 /* scan for RCD command in extended SenseID data */
2189 ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2190 if (!ciw || ciw->cmd == 0)
2192 if (ciw->count < sizeof(struct qeth_node_desc))
2195 iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2199 iob->callback = qeth_read_conf_data_cb;
2200 qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2203 return qeth_send_control_data(card, iob, NULL, NULL);
2206 static int qeth_idx_check_activate_response(struct qeth_card *card,
2207 struct qeth_channel *channel,
2208 struct qeth_cmd_buffer *iob)
2212 rc = qeth_check_idx_response(card, iob->data);
2216 if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2219 /* negative reply: */
2220 QETH_CARD_TEXT_(card, 2, "idxneg%c",
2221 QETH_IDX_ACT_CAUSE_CODE(iob->data));
2223 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2224 case QETH_IDX_ACT_ERR_EXCL:
2225 dev_err(&channel->ccwdev->dev,
2226 "The adapter is used exclusively by another host\n");
2228 case QETH_IDX_ACT_ERR_AUTH:
2229 case QETH_IDX_ACT_ERR_AUTH_USER:
2230 dev_err(&channel->ccwdev->dev,
2231 "Setting the device online failed because of insufficient authorization\n");
2234 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2235 CCW_DEVID(channel->ccwdev));
2240 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2241 struct qeth_cmd_buffer *iob,
2242 unsigned int data_length)
2244 struct qeth_channel *channel = iob->channel;
2248 QETH_CARD_TEXT(card, 2, "idxrdcb");
2250 rc = qeth_idx_check_activate_response(card, channel, iob);
2254 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2255 if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2256 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2257 CCW_DEVID(channel->ccwdev),
2258 card->info.func_level, peer_level);
2263 memcpy(&card->token.issuer_rm_r,
2264 QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2265 QETH_MPC_TOKEN_LENGTH);
2266 memcpy(&card->info.mcl_level[0],
2267 QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2270 qeth_notify_cmd(iob, rc);
2274 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2275 struct qeth_cmd_buffer *iob,
2276 unsigned int data_length)
2278 struct qeth_channel *channel = iob->channel;
2282 QETH_CARD_TEXT(card, 2, "idxwrcb");
2284 rc = qeth_idx_check_activate_response(card, channel, iob);
2288 memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2289 if ((peer_level & ~0x0100) !=
2290 qeth_peer_func_level(card->info.func_level)) {
2291 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2292 CCW_DEVID(channel->ccwdev),
2293 card->info.func_level, peer_level);
2298 qeth_notify_cmd(iob, rc);
2302 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2303 struct qeth_cmd_buffer *iob)
2305 u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2306 u8 port = ((u8)card->dev->dev_port) | 0x80;
2307 struct ccw1 *ccw = __ccw_from_cmd(iob);
2308 struct ccw_dev_id dev_id;
2310 qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2312 qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2313 ccw_device_get_id(CARD_DDEV(card), &dev_id);
2314 iob->finalize = qeth_idx_finalize_cmd;
2316 port |= QETH_IDX_ACT_INVAL_FRAME;
2317 memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2318 memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2319 &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2320 memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2321 &card->info.func_level, 2);
2322 memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
2323 memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2326 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2328 struct qeth_channel *channel = &card->read;
2329 struct qeth_cmd_buffer *iob;
2332 QETH_CARD_TEXT(card, 2, "idxread");
2334 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2338 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2339 qeth_idx_setup_activate_cmd(card, iob);
2340 iob->callback = qeth_idx_activate_read_channel_cb;
2342 rc = qeth_send_control_data(card, iob, NULL, NULL);
2346 channel->state = CH_STATE_UP;
2350 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2352 struct qeth_channel *channel = &card->write;
2353 struct qeth_cmd_buffer *iob;
2356 QETH_CARD_TEXT(card, 2, "idxwrite");
2358 iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2362 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2363 qeth_idx_setup_activate_cmd(card, iob);
2364 iob->callback = qeth_idx_activate_write_channel_cb;
2366 rc = qeth_send_control_data(card, iob, NULL, NULL);
2370 channel->state = CH_STATE_UP;
2374 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2377 struct qeth_cmd_buffer *iob;
2379 QETH_CARD_TEXT(card, 2, "cmenblcb");
2381 iob = (struct qeth_cmd_buffer *) data;
2382 memcpy(&card->token.cm_filter_r,
2383 QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2384 QETH_MPC_TOKEN_LENGTH);
2388 static int qeth_cm_enable(struct qeth_card *card)
2390 struct qeth_cmd_buffer *iob;
2392 QETH_CARD_TEXT(card, 2, "cmenable");
2394 iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2398 memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2399 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2400 memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2401 &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2403 return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2406 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2409 struct qeth_cmd_buffer *iob;
2411 QETH_CARD_TEXT(card, 2, "cmsetpcb");
2413 iob = (struct qeth_cmd_buffer *) data;
2414 memcpy(&card->token.cm_connection_r,
2415 QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2416 QETH_MPC_TOKEN_LENGTH);
2420 static int qeth_cm_setup(struct qeth_card *card)
2422 struct qeth_cmd_buffer *iob;
2424 QETH_CARD_TEXT(card, 2, "cmsetup");
2426 iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2430 memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2431 &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2432 memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2433 &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2434 memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2435 &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2436 return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2439 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2441 struct net_device *dev = card->dev;
2442 unsigned int new_mtu;
2445 /* IQD needs accurate max MTU to set up its RX buffers: */
2448 /* tolerate quirky HW: */
2449 max_mtu = ETH_MAX_MTU;
2454 /* move any device with default MTU to new max MTU: */
2455 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2457 /* adjust RX buffer size to new max MTU: */
2458 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2459 if (dev->max_mtu && dev->max_mtu != max_mtu)
2460 qeth_free_qdio_queues(card);
2464 /* default MTUs for first setup: */
2465 else if (IS_LAYER2(card))
2466 new_mtu = ETH_DATA_LEN;
2468 new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2471 dev->max_mtu = max_mtu;
2472 dev->mtu = min(new_mtu, max_mtu);
2477 static int qeth_get_mtu_outof_framesize(int framesize)
2479 switch (framesize) {
2493 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2496 __u16 mtu, framesize;
2499 struct qeth_cmd_buffer *iob;
2501 QETH_CARD_TEXT(card, 2, "ulpenacb");
2503 iob = (struct qeth_cmd_buffer *) data;
2504 memcpy(&card->token.ulp_filter_r,
2505 QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2506 QETH_MPC_TOKEN_LENGTH);
2508 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2509 mtu = qeth_get_mtu_outof_framesize(framesize);
2511 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2513 *(u16 *)reply->param = mtu;
2515 memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2516 if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2518 QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2519 card->info.link_type = link_type;
2521 card->info.link_type = 0;
2522 QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2526 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2529 return QETH_PROT_OSN2;
2530 return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2533 static int qeth_ulp_enable(struct qeth_card *card)
2535 u8 prot_type = qeth_mpc_select_prot_type(card);
2536 struct qeth_cmd_buffer *iob;
2540 QETH_CARD_TEXT(card, 2, "ulpenabl");
2542 iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2546 *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2547 memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2548 memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2549 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2550 memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2551 &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2552 rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2555 return qeth_update_max_mtu(card, max_mtu);
2558 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2561 struct qeth_cmd_buffer *iob;
2563 QETH_CARD_TEXT(card, 2, "ulpstpcb");
2565 iob = (struct qeth_cmd_buffer *) data;
2566 memcpy(&card->token.ulp_connection_r,
2567 QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2568 QETH_MPC_TOKEN_LENGTH);
2569 if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2571 QETH_CARD_TEXT(card, 2, "olmlimit");
2572 dev_err(&card->gdev->dev, "A connection could not be "
2573 "established because of an OLM limit\n");
2579 static int qeth_ulp_setup(struct qeth_card *card)
2582 struct qeth_cmd_buffer *iob;
2583 struct ccw_dev_id dev_id;
2585 QETH_CARD_TEXT(card, 2, "ulpsetup");
2587 iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2591 memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2592 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2593 memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2594 &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2595 memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2596 &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2598 ccw_device_get_id(CARD_DDEV(card), &dev_id);
2599 memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2600 temp = (card->info.cula << 8) + card->info.unit_addr2;
2601 memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2602 return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2605 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2607 struct qeth_qdio_out_buffer *newbuf;
2609 newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2613 newbuf->buffer = q->qdio_bufs[bidx];
2614 skb_queue_head_init(&newbuf->skb_list);
2615 lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2617 newbuf->next_pending = q->bufs[bidx];
2618 atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2619 q->bufs[bidx] = newbuf;
2623 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2628 qeth_drain_output_queue(q, true);
2629 qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2633 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2635 struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2640 if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2647 static void qeth_tx_completion_timer(struct timer_list *timer)
2649 struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2651 napi_schedule(&queue->napi);
2652 QETH_TXQ_STAT_INC(queue, completion_timer);
2655 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2659 QETH_CARD_TEXT(card, 2, "allcqdbf");
2661 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2662 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2665 QETH_CARD_TEXT(card, 2, "inq");
2666 card->qdio.in_q = qeth_alloc_qdio_queue();
2667 if (!card->qdio.in_q)
2670 /* inbound buffer pool */
2671 if (qeth_alloc_buffer_pool(card))
2675 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2676 struct qeth_qdio_out_q *queue;
2678 queue = qeth_alloc_output_queue();
2681 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2682 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2683 card->qdio.out_qs[i] = queue;
2685 queue->queue_no = i;
2686 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2687 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2688 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2690 /* give outbound qeth_qdio_buffers their qdio_buffers */
2691 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2692 WARN_ON(queue->bufs[j]);
2693 if (qeth_init_qdio_out_buf(queue, j))
2694 goto out_freeoutqbufs;
2699 if (qeth_alloc_cq(card))
2707 kmem_cache_free(qeth_qdio_outbuf_cache,
2708 card->qdio.out_qs[i]->bufs[j]);
2709 card->qdio.out_qs[i]->bufs[j] = NULL;
2713 qeth_free_output_queue(card->qdio.out_qs[--i]);
2714 card->qdio.out_qs[i] = NULL;
2716 qeth_free_buffer_pool(card);
2718 qeth_free_qdio_queue(card->qdio.in_q);
2719 card->qdio.in_q = NULL;
2721 atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2725 static void qeth_free_qdio_queues(struct qeth_card *card)
2729 if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2730 QETH_QDIO_UNINITIALIZED)
2734 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2735 if (card->qdio.in_q->bufs[j].rx_skb)
2736 dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2738 qeth_free_qdio_queue(card->qdio.in_q);
2739 card->qdio.in_q = NULL;
2740 /* inbound buffer pool */
2741 qeth_free_buffer_pool(card);
2742 /* free outbound qdio_qs */
2743 for (i = 0; i < card->qdio.no_out_queues; i++) {
2744 qeth_free_output_queue(card->qdio.out_qs[i]);
2745 card->qdio.out_qs[i] = NULL;
2749 static void qeth_create_qib_param_field(struct qeth_card *card,
2753 param_field[0] = _ascebc['P'];
2754 param_field[1] = _ascebc['C'];
2755 param_field[2] = _ascebc['I'];
2756 param_field[3] = _ascebc['T'];
2757 *((unsigned int *) (¶m_field[4])) = QETH_PCI_THRESHOLD_A(card);
2758 *((unsigned int *) (¶m_field[8])) = QETH_PCI_THRESHOLD_B(card);
2759 *((unsigned int *) (¶m_field[12])) = QETH_PCI_TIMER_VALUE(card);
2762 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2765 param_field[16] = _ascebc['B'];
2766 param_field[17] = _ascebc['L'];
2767 param_field[18] = _ascebc['K'];
2768 param_field[19] = _ascebc['T'];
2769 *((unsigned int *) (¶m_field[20])) = card->info.blkt.time_total;
2770 *((unsigned int *) (¶m_field[24])) = card->info.blkt.inter_packet;
2771 *((unsigned int *) (¶m_field[28])) =
2772 card->info.blkt.inter_packet_jumbo;
2775 static int qeth_qdio_activate(struct qeth_card *card)
2777 QETH_CARD_TEXT(card, 3, "qdioact");
2778 return qdio_activate(CARD_DDEV(card));
2781 static int qeth_dm_act(struct qeth_card *card)
2783 struct qeth_cmd_buffer *iob;
2785 QETH_CARD_TEXT(card, 2, "dmact");
2787 iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2791 memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2792 &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2793 memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2794 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2795 return qeth_send_control_data(card, iob, NULL, NULL);
2798 static int qeth_mpc_initialize(struct qeth_card *card)
2802 QETH_CARD_TEXT(card, 2, "mpcinit");
2804 rc = qeth_issue_next_read(card);
2806 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2809 rc = qeth_cm_enable(card);
2811 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2814 rc = qeth_cm_setup(card);
2816 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2819 rc = qeth_ulp_enable(card);
2821 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2824 rc = qeth_ulp_setup(card);
2826 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2829 rc = qeth_alloc_qdio_queues(card);
2831 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2834 rc = qeth_qdio_establish(card);
2836 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2837 qeth_free_qdio_queues(card);
2840 rc = qeth_qdio_activate(card);
2842 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2845 rc = qeth_dm_act(card);
2847 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2854 void qeth_print_status_message(struct qeth_card *card)
2856 switch (card->info.type) {
2857 case QETH_CARD_TYPE_OSD:
2858 case QETH_CARD_TYPE_OSM:
2859 case QETH_CARD_TYPE_OSX:
2860 /* VM will use a non-zero first character
2861 * to indicate a HiperSockets like reporting
2862 * of the level OSA sets the first character to zero
2864 if (!card->info.mcl_level[0]) {
2865 sprintf(card->info.mcl_level, "%02x%02x",
2866 card->info.mcl_level[2],
2867 card->info.mcl_level[3]);
2871 case QETH_CARD_TYPE_IQD:
2872 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2873 card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2874 card->info.mcl_level[0]];
2875 card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2876 card->info.mcl_level[1]];
2877 card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2878 card->info.mcl_level[2]];
2879 card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2880 card->info.mcl_level[3]];
2881 card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2885 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2887 dev_info(&card->gdev->dev,
2888 "Device is a%s card%s%s%s\nwith link type %s.\n",
2889 qeth_get_cardname(card),
2890 (card->info.mcl_level[0]) ? " (level: " : "",
2891 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2892 (card->info.mcl_level[0]) ? ")" : "",
2893 qeth_get_cardname_short(card));
2895 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2897 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2899 struct qeth_buffer_pool_entry *entry;
2901 QETH_CARD_TEXT(card, 5, "inwrklst");
2903 list_for_each_entry(entry,
2904 &card->qdio.init_pool.entry_list, init_list) {
2905 qeth_put_buffer_pool_entry(card, entry);
2909 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2910 struct qeth_card *card)
2912 struct qeth_buffer_pool_entry *entry;
2915 if (list_empty(&card->qdio.in_buf_pool.entry_list))
2918 list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2920 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2921 if (page_count(entry->elements[i]) > 1) {
2927 list_del_init(&entry->list);
2932 /* no free buffer in pool so take first one and swap pages */
2933 entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2934 struct qeth_buffer_pool_entry, list);
2935 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2936 if (page_count(entry->elements[i]) > 1) {
2937 struct page *page = dev_alloc_page();
2942 __free_page(entry->elements[i]);
2943 entry->elements[i] = page;
2944 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2947 list_del_init(&entry->list);
2951 static int qeth_init_input_buffer(struct qeth_card *card,
2952 struct qeth_qdio_buffer *buf)
2954 struct qeth_buffer_pool_entry *pool_entry;
2957 if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2958 buf->rx_skb = netdev_alloc_skb(card->dev,
2960 sizeof(struct ipv6hdr));
2965 pool_entry = qeth_find_free_buffer_pool_entry(card);
2970 * since the buffer is accessed only from the input_tasklet
2971 * there shouldn't be a need to synchronize; also, since we use
2972 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off
2976 buf->pool_entry = pool_entry;
2977 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2978 buf->buffer->element[i].length = PAGE_SIZE;
2979 buf->buffer->element[i].addr =
2980 page_to_phys(pool_entry->elements[i]);
2981 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2982 buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2984 buf->buffer->element[i].eflags = 0;
2985 buf->buffer->element[i].sflags = 0;
2990 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2991 struct qeth_qdio_out_q *queue)
2993 if (!IS_IQD(card) ||
2994 qeth_iqd_is_mcast_queue(card, queue) ||
2995 card->options.cq == QETH_CQ_ENABLED ||
2996 qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2999 return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3002 static int qeth_init_qdio_queues(struct qeth_card *card)
3007 QETH_CARD_TEXT(card, 2, "initqdqs");
3010 qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3011 memset(&card->rx, 0, sizeof(struct qeth_rx));
3013 qeth_initialize_working_pool_list(card);
3014 /*give only as many buffers to hardware as we have buffer pool entries*/
3015 for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; i++) {
3016 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3021 card->qdio.in_q->next_buf_to_init =
3022 card->qdio.in_buf_pool.buf_count - 1;
3023 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
3024 card->qdio.in_buf_pool.buf_count - 1);
3026 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3031 rc = qeth_cq_init(card);
3036 /* outbound queue */
3037 for (i = 0; i < card->qdio.no_out_queues; ++i) {
3038 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3040 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3041 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3042 queue->next_buf_to_fill = 0;
3044 queue->prev_hdr = NULL;
3045 queue->coalesced_frames = 0;
3046 queue->bulk_start = 0;
3047 queue->bulk_count = 0;
3048 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3049 atomic_set(&queue->used_buffers, 0);
3050 atomic_set(&queue->set_pci_flags_count, 0);
3051 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3052 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3057 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3058 struct qeth_cmd_buffer *iob)
3060 qeth_mpc_finalize_cmd(card, iob);
3062 /* override with IPA-specific values: */
3063 __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3066 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3068 bool (*match)(struct qeth_cmd_buffer *iob,
3069 struct qeth_cmd_buffer *reply))
3071 u8 prot_type = qeth_mpc_select_prot_type(card);
3072 u16 total_length = iob->length;
3074 qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3076 iob->finalize = qeth_ipa_finalize_cmd;
3079 memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3080 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3081 memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3082 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3083 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3084 memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3085 &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3086 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3088 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3090 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3091 struct qeth_cmd_buffer *reply)
3093 struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3095 return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3098 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3099 enum qeth_ipa_cmds cmd_code,
3100 enum qeth_prot_versions prot,
3101 unsigned int data_length)
3103 enum qeth_link_types link_type = card->info.link_type;
3104 struct qeth_cmd_buffer *iob;
3105 struct qeth_ipacmd_hdr *hdr;
3107 data_length += offsetof(struct qeth_ipa_cmd, data);
3108 iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3113 qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3115 hdr = &__ipa_cmd(iob)->hdr;
3116 hdr->command = cmd_code;
3117 hdr->initiator = IPA_CMD_INITIATOR_HOST;
3118 /* hdr->seqno is set by qeth_send_control_data() */
3119 hdr->adapter_type = (link_type == QETH_LINK_TYPE_HSTR) ? 2 : 1;
3120 hdr->rel_adapter_no = (u8) card->dev->dev_port;
3121 hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3122 hdr->param_count = 1;
3123 hdr->prot_version = prot;
3126 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3128 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3129 struct qeth_reply *reply, unsigned long data)
3131 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3133 return (cmd->hdr.return_code) ? -EIO : 0;
3137 * qeth_send_ipa_cmd() - send an IPA command
3139 * See qeth_send_control_data() for explanation of the arguments.
3142 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3143 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3149 QETH_CARD_TEXT(card, 4, "sendipa");
3151 if (card->read_or_write_problem) {
3156 if (reply_cb == NULL)
3157 reply_cb = qeth_send_ipa_cmd_cb;
3158 rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3160 qeth_clear_ipacmd_list(card);
3161 qeth_schedule_recovery(card);
3165 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3167 static int qeth_send_startlan_cb(struct qeth_card *card,
3168 struct qeth_reply *reply, unsigned long data)
3170 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3172 if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3175 return (cmd->hdr.return_code) ? -EIO : 0;
3178 static int qeth_send_startlan(struct qeth_card *card)
3180 struct qeth_cmd_buffer *iob;
3182 QETH_CARD_TEXT(card, 2, "strtlan");
3184 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3187 return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3190 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3192 if (!cmd->hdr.return_code)
3193 cmd->hdr.return_code =
3194 cmd->data.setadapterparms.hdr.return_code;
3195 return cmd->hdr.return_code;
3198 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3199 struct qeth_reply *reply, unsigned long data)
3201 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3203 QETH_CARD_TEXT(card, 3, "quyadpcb");
3204 if (qeth_setadpparms_inspect_rc(cmd))
3207 if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
3208 card->info.link_type =
3209 cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
3210 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3212 card->options.adp.supported =
3213 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
3217 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3218 enum qeth_ipa_setadp_cmd adp_cmd,
3219 unsigned int data_length)
3221 struct qeth_ipacmd_setadpparms_hdr *hdr;
3222 struct qeth_cmd_buffer *iob;
3224 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3226 offsetof(struct qeth_ipacmd_setadpparms,
3231 hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3232 hdr->cmdlength = sizeof(*hdr) + data_length;
3233 hdr->command_code = adp_cmd;
3234 hdr->used_total = 1;
3239 static int qeth_query_setadapterparms(struct qeth_card *card)
3242 struct qeth_cmd_buffer *iob;
3244 QETH_CARD_TEXT(card, 3, "queryadp");
3245 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3246 SETADP_DATA_SIZEOF(query_cmds_supp));
3249 rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3253 static int qeth_query_ipassists_cb(struct qeth_card *card,
3254 struct qeth_reply *reply, unsigned long data)
3256 struct qeth_ipa_cmd *cmd;
3258 QETH_CARD_TEXT(card, 2, "qipasscb");
3260 cmd = (struct qeth_ipa_cmd *) data;
3262 switch (cmd->hdr.return_code) {
3263 case IPA_RC_SUCCESS:
3265 case IPA_RC_NOTSUPP:
3266 case IPA_RC_L2_UNSUPPORTED_CMD:
3267 QETH_CARD_TEXT(card, 2, "ipaunsup");
3268 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3269 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3272 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3273 CARD_DEVID(card), cmd->hdr.return_code);
3277 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3278 card->options.ipa4 = cmd->hdr.assists;
3279 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3280 card->options.ipa6 = cmd->hdr.assists;
3282 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3287 static int qeth_query_ipassists(struct qeth_card *card,
3288 enum qeth_prot_versions prot)
3291 struct qeth_cmd_buffer *iob;
3293 QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3294 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3297 rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3301 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3302 struct qeth_reply *reply, unsigned long data)
3304 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3305 struct qeth_query_switch_attributes *attrs;
3306 struct qeth_switch_info *sw_info;
3308 QETH_CARD_TEXT(card, 2, "qswiatcb");
3309 if (qeth_setadpparms_inspect_rc(cmd))
3312 sw_info = (struct qeth_switch_info *)reply->param;
3313 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3314 sw_info->capabilities = attrs->capabilities;
3315 sw_info->settings = attrs->settings;
3316 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3321 int qeth_query_switch_attributes(struct qeth_card *card,
3322 struct qeth_switch_info *sw_info)
3324 struct qeth_cmd_buffer *iob;
3326 QETH_CARD_TEXT(card, 2, "qswiattr");
3327 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3329 if (!netif_carrier_ok(card->dev))
3331 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3334 return qeth_send_ipa_cmd(card, iob,
3335 qeth_query_switch_attributes_cb, sw_info);
3338 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3339 enum qeth_diags_cmds sub_cmd,
3340 unsigned int data_length)
3342 struct qeth_ipacmd_diagass *cmd;
3343 struct qeth_cmd_buffer *iob;
3345 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3346 DIAG_HDR_LEN + data_length);
3350 cmd = &__ipa_cmd(iob)->data.diagass;
3351 cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3352 cmd->subcmd = sub_cmd;
3355 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3357 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3358 struct qeth_reply *reply, unsigned long data)
3360 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3361 u16 rc = cmd->hdr.return_code;
3364 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3368 card->info.diagass_support = cmd->data.diagass.ext;
3372 static int qeth_query_setdiagass(struct qeth_card *card)
3374 struct qeth_cmd_buffer *iob;
3376 QETH_CARD_TEXT(card, 2, "qdiagass");
3377 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3380 return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3383 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3385 unsigned long info = get_zeroed_page(GFP_KERNEL);
3386 struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3387 struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3388 struct ccw_dev_id ccwid;
3391 tid->chpid = card->info.chpid;
3392 ccw_device_get_id(CARD_RDEV(card), &ccwid);
3393 tid->ssid = ccwid.ssid;
3394 tid->devno = ccwid.devno;
3397 level = stsi(NULL, 0, 0, 0);
3398 if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3399 tid->lparnr = info222->lpar_number;
3400 if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3401 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3402 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3408 static int qeth_hw_trap_cb(struct qeth_card *card,
3409 struct qeth_reply *reply, unsigned long data)
3411 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3412 u16 rc = cmd->hdr.return_code;
3415 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3421 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3423 struct qeth_cmd_buffer *iob;
3424 struct qeth_ipa_cmd *cmd;
3426 QETH_CARD_TEXT(card, 2, "diagtrap");
3427 iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3430 cmd = __ipa_cmd(iob);
3431 cmd->data.diagass.type = 1;
3432 cmd->data.diagass.action = action;
3434 case QETH_DIAGS_TRAP_ARM:
3435 cmd->data.diagass.options = 0x0003;
3436 cmd->data.diagass.ext = 0x00010000 +
3437 sizeof(struct qeth_trap_id);
3438 qeth_get_trap_id(card,
3439 (struct qeth_trap_id *)cmd->data.diagass.cdata);
3441 case QETH_DIAGS_TRAP_DISARM:
3442 cmd->data.diagass.options = 0x0001;
3444 case QETH_DIAGS_TRAP_CAPTURE:
3447 return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3450 static int qeth_check_qdio_errors(struct qeth_card *card,
3451 struct qdio_buffer *buf,
3452 unsigned int qdio_error,
3453 const char *dbftext)
3456 QETH_CARD_TEXT(card, 2, dbftext);
3457 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3458 buf->element[15].sflags);
3459 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3460 buf->element[14].sflags);
3461 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3462 if ((buf->element[15].sflags) == 0x12) {
3463 QETH_CARD_STAT_INC(card, rx_fifo_errors);
3471 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3473 struct qeth_qdio_q *queue = card->qdio.in_q;
3474 struct list_head *lh;
3480 count = (index < queue->next_buf_to_init)?
3481 card->qdio.in_buf_pool.buf_count -
3482 (queue->next_buf_to_init - index) :
3483 card->qdio.in_buf_pool.buf_count -
3484 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3485 /* only requeue at a certain threshold to avoid SIGAs */
3486 if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3487 for (i = queue->next_buf_to_init;
3488 i < queue->next_buf_to_init + count; ++i) {
3489 if (qeth_init_input_buffer(card,
3490 &queue->bufs[QDIO_BUFNR(i)])) {
3497 if (newcount < count) {
3498 /* we are in memory shortage so we switch back to
3499 traditional skb allocation and drop packages */
3500 atomic_set(&card->force_alloc_skb, 3);
3503 atomic_add_unless(&card->force_alloc_skb, -1, 0);
3508 list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3510 if (i == card->qdio.in_buf_pool.buf_count) {
3511 QETH_CARD_TEXT(card, 2, "qsarbw");
3512 card->reclaim_index = index;
3513 schedule_delayed_work(
3514 &card->buffer_reclaim_work,
3515 QETH_RECLAIM_WORK_TIME);
3521 * according to old code it should be avoided to requeue all
3522 * 128 buffers in order to benefit from PCI avoidance.
3523 * this function keeps at least one buffer (the buffer at
3524 * 'index') un-requeued -> this buffer is the first buffer that
3525 * will be requeued the next time
3527 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3528 queue->next_buf_to_init, count);
3530 QETH_CARD_TEXT(card, 2, "qinberr");
3532 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3537 static void qeth_buffer_reclaim_work(struct work_struct *work)
3539 struct qeth_card *card = container_of(work, struct qeth_card,
3540 buffer_reclaim_work.work);
3542 QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3543 qeth_queue_input_buffer(card, card->reclaim_index);
3546 static void qeth_handle_send_error(struct qeth_card *card,
3547 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3549 int sbalf15 = buffer->buffer->element[15].sflags;
3551 QETH_CARD_TEXT(card, 6, "hdsnderr");
3552 qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3557 if ((sbalf15 >= 15) && (sbalf15 <= 31))
3560 QETH_CARD_TEXT(card, 1, "lnkfail");
3561 QETH_CARD_TEXT_(card, 1, "%04x %02x",
3562 (u16)qdio_err, (u8)sbalf15);
3566 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3567 * @queue: queue to check for packing buffer
3569 * Returns number of buffers that were prepared for flush.
3571 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3573 struct qeth_qdio_out_buffer *buffer;
3575 buffer = queue->bufs[queue->next_buf_to_fill];
3576 if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3577 (buffer->next_element_to_fill > 0)) {
3578 /* it's a packing buffer */
3579 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3580 queue->next_buf_to_fill =
3581 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3588 * Switched to packing state if the number of used buffers on a queue
3589 * reaches a certain limit.
3591 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3593 if (!queue->do_pack) {
3594 if (atomic_read(&queue->used_buffers)
3595 >= QETH_HIGH_WATERMARK_PACK){
3596 /* switch non-PACKING -> PACKING */
3597 QETH_CARD_TEXT(queue->card, 6, "np->pack");
3598 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3605 * Switches from packing to non-packing mode. If there is a packing
3606 * buffer on the queue this buffer will be prepared to be flushed.
3607 * In that case 1 is returned to inform the caller. If no buffer
3608 * has to be flushed, zero is returned.
3610 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3612 if (queue->do_pack) {
3613 if (atomic_read(&queue->used_buffers)
3614 <= QETH_LOW_WATERMARK_PACK) {
3615 /* switch PACKING -> non-PACKING */
3616 QETH_CARD_TEXT(queue->card, 6, "pack->np");
3617 QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3619 return qeth_prep_flush_pack_buffer(queue);
3625 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3628 struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3629 unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3630 struct qeth_card *card = queue->card;
3634 for (i = index; i < index + count; ++i) {
3635 unsigned int bidx = QDIO_BUFNR(i);
3636 struct sk_buff *skb;
3638 buf = queue->bufs[bidx];
3639 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3640 SBAL_EFLAGS_LAST_ENTRY;
3641 queue->coalesced_frames += buf->frames;
3643 if (queue->bufstates)
3644 queue->bufstates[bidx].user = buf;
3647 skb_queue_walk(&buf->skb_list, skb)
3648 skb_tx_timestamp(skb);
3652 if (!IS_IQD(card)) {
3653 if (!queue->do_pack) {
3654 if ((atomic_read(&queue->used_buffers) >=
3655 (QETH_HIGH_WATERMARK_PACK -
3656 QETH_WATERMARK_PACK_FUZZ)) &&
3657 !atomic_read(&queue->set_pci_flags_count)) {
3658 /* it's likely that we'll go to packing
3660 atomic_inc(&queue->set_pci_flags_count);
3661 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3664 if (!atomic_read(&queue->set_pci_flags_count)) {
3666 * there's no outstanding PCI any more, so we
3667 * have to request a PCI to be sure the the PCI
3668 * will wake at some time in the future then we
3669 * can flush packed buffers that might still be
3670 * hanging around, which can happen if no
3671 * further send was requested by the stack
3673 atomic_inc(&queue->set_pci_flags_count);
3674 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3678 if (atomic_read(&queue->set_pci_flags_count))
3679 qdio_flags |= QDIO_FLAG_PCI_OUT;
3682 QETH_TXQ_STAT_INC(queue, doorbell);
3683 rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3684 queue->queue_no, index, count);
3686 /* Fake the TX completion interrupt: */
3688 unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3689 unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3691 if (frames && queue->coalesced_frames >= frames) {
3692 napi_schedule(&queue->napi);
3693 queue->coalesced_frames = 0;
3694 QETH_TXQ_STAT_INC(queue, coal_frames);
3696 qeth_tx_arm_timer(queue, usecs);
3701 /* ignore temporary SIGA errors without busy condition */
3704 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3705 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3706 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3707 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3708 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3710 /* this must not happen under normal circumstances. if it
3711 * happens something is really wrong -> recover */
3712 qeth_schedule_recovery(queue->card);
3717 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3719 qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3721 queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3722 queue->prev_hdr = NULL;
3723 queue->bulk_count = 0;
3726 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3730 int q_was_packing = 0;
3733 * check if weed have to switch to non-packing mode or if
3734 * we have to get a pci flag out on the queue
3736 if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3737 !atomic_read(&queue->set_pci_flags_count)) {
3738 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3739 QETH_OUT_Q_UNLOCKED) {
3741 * If we get in here, there was no action in
3742 * do_send_packet. So, we check if there is a
3743 * packing buffer to be flushed here.
3745 index = queue->next_buf_to_fill;
3746 q_was_packing = queue->do_pack;
3747 /* queue->do_pack may change */
3749 flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3751 !atomic_read(&queue->set_pci_flags_count))
3752 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3754 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3756 qeth_flush_buffers(queue, index, flush_cnt);
3757 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3762 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3764 struct qeth_card *card = (struct qeth_card *)card_ptr;
3766 napi_schedule_irqoff(&card->napi);
3769 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3773 if (card->options.cq == QETH_CQ_NOTAVAILABLE) {
3777 if (card->options.cq == cq) {
3782 qeth_free_qdio_queues(card);
3783 card->options.cq = cq;
3790 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3792 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3793 unsigned int queue, int first_element,
3796 struct qeth_qdio_q *cq = card->qdio.c_q;
3800 QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3801 QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3802 QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3805 netif_tx_stop_all_queues(card->dev);
3806 qeth_schedule_recovery(card);
3810 for (i = first_element; i < first_element + count; ++i) {
3811 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3814 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3815 buffer->element[e].addr) {
3816 unsigned long phys_aob_addr = buffer->element[e].addr;
3818 qeth_qdio_handle_aob(card, phys_aob_addr);
3821 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3823 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3824 card->qdio.c_q->next_buf_to_init,
3827 dev_warn(&card->gdev->dev,
3828 "QDIO reported an error, rc=%i\n", rc);
3829 QETH_CARD_TEXT(card, 2, "qcqherr");
3832 cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3835 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3836 unsigned int qdio_err, int queue,
3837 int first_elem, int count,
3838 unsigned long card_ptr)
3840 struct qeth_card *card = (struct qeth_card *)card_ptr;
3842 QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3843 QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3846 qeth_schedule_recovery(card);
3849 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3850 unsigned int qdio_error, int __queue,
3851 int first_element, int count,
3852 unsigned long card_ptr)
3854 struct qeth_card *card = (struct qeth_card *) card_ptr;
3855 struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3856 struct net_device *dev = card->dev;
3857 struct netdev_queue *txq;
3860 QETH_CARD_TEXT(card, 6, "qdouhdl");
3861 if (qdio_error & QDIO_ERROR_FATAL) {
3862 QETH_CARD_TEXT(card, 2, "achkcond");
3863 netif_tx_stop_all_queues(dev);
3864 qeth_schedule_recovery(card);
3868 for (i = first_element; i < (first_element + count); ++i) {
3869 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3871 qeth_handle_send_error(card, buf, qdio_error);
3872 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3875 atomic_sub(count, &queue->used_buffers);
3876 qeth_check_outbound_queue(queue);
3878 txq = netdev_get_tx_queue(dev, __queue);
3879 /* xmit may have observed the full-condition, but not yet stopped the
3880 * txq. In which case the code below won't trigger. So before returning,
3881 * xmit will re-check the txq's fill level and wake it up if needed.
3883 if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3884 netif_tx_wake_queue(txq);
3888 * Note: Function assumes that we have 4 outbound queues.
3890 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3892 struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3895 switch (card->qdio.do_prio_queueing) {
3896 case QETH_PRIO_Q_ING_TOS:
3897 case QETH_PRIO_Q_ING_PREC:
3898 switch (qeth_get_ip_version(skb)) {
3900 tos = ipv4_get_dsfield(ip_hdr(skb));
3903 tos = ipv6_get_dsfield(ipv6_hdr(skb));
3906 return card->qdio.default_out_queue;
3908 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3909 return ~tos >> 6 & 3;
3910 if (tos & IPTOS_MINCOST)
3912 if (tos & IPTOS_RELIABILITY)
3914 if (tos & IPTOS_THROUGHPUT)
3916 if (tos & IPTOS_LOWDELAY)
3919 case QETH_PRIO_Q_ING_SKB:
3920 if (skb->priority > 5)
3922 return ~skb->priority >> 1 & 3;
3923 case QETH_PRIO_Q_ING_VLAN:
3924 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3925 return ~ntohs(veth->h_vlan_TCI) >>
3926 (VLAN_PRIO_SHIFT + 1) & 3;
3928 case QETH_PRIO_Q_ING_FIXED:
3929 return card->qdio.default_out_queue;
3933 return card->qdio.default_out_queue;
3935 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3938 * qeth_get_elements_for_frags() - find number of SBALEs for skb frags.
3941 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3942 * fragmented part of the SKB. Returns zero for linear SKB.
3944 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3946 int cnt, elements = 0;
3948 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3949 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3951 elements += qeth_get_elements_for_range(
3952 (addr_t)skb_frag_address(frag),
3953 (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3959 * qeth_count_elements() - Counts the number of QDIO buffer elements needed
3960 * to transmit an skb.
3961 * @skb: the skb to operate on.
3962 * @data_offset: skip this part of the skb's linear data
3964 * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3965 * skb's data (both its linear part and paged fragments).
3967 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3969 unsigned int elements = qeth_get_elements_for_frags(skb);
3970 addr_t end = (addr_t)skb->data + skb_headlen(skb);
3971 addr_t start = (addr_t)skb->data + data_offset;
3974 elements += qeth_get_elements_for_range(start, end);
3977 EXPORT_SYMBOL_GPL(qeth_count_elements);
3979 #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \
3983 * qeth_add_hw_header() - add a HW header to an skb.
3984 * @skb: skb that the HW header should be added to.
3985 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3986 * it contains a valid pointer to a qeth_hdr.
3987 * @hdr_len: length of the HW header.
3988 * @proto_len: length of protocol headers that need to be in same page as the
3991 * Returns the pushed length. If the header can't be pushed on
3992 * (eg. because it would cross a page boundary), it is allocated from
3993 * the cache instead and 0 is returned.
3994 * The number of needed buffer elements is returned in @elements.
3995 * Error to create the hdr is indicated by returning with < 0.
3997 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3998 struct sk_buff *skb, struct qeth_hdr **hdr,
3999 unsigned int hdr_len, unsigned int proto_len,
4000 unsigned int *elements)
4002 gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
4003 const unsigned int contiguous = proto_len ? proto_len : 1;
4004 const unsigned int max_elements = queue->max_elements;
4005 unsigned int __elements;
4011 start = (addr_t)skb->data - hdr_len;
4012 end = (addr_t)skb->data;
4014 if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4015 /* Push HW header into same page as first protocol header. */
4017 /* ... but TSO always needs a separate element for headers: */
4018 if (skb_is_gso(skb))
4019 __elements = 1 + qeth_count_elements(skb, proto_len);
4021 __elements = qeth_count_elements(skb, 0);
4022 } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4023 /* Push HW header into preceding page, flush with skb->data. */
4025 __elements = 1 + qeth_count_elements(skb, 0);
4027 /* Use header cache, copy protocol headers up. */
4029 __elements = 1 + qeth_count_elements(skb, proto_len);
4032 /* Compress skb to fit into one IO buffer: */
4033 if (__elements > max_elements) {
4034 if (!skb_is_nonlinear(skb)) {
4035 /* Drop it, no easy way of shrinking it further. */
4036 QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4037 max_elements, __elements, skb->len);
4041 rc = skb_linearize(skb);
4043 QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4047 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4048 /* Linearization changed the layout, re-evaluate: */
4052 *elements = __elements;
4053 /* Add the header: */
4055 *hdr = skb_push(skb, hdr_len);
4059 /* Fall back to cache element with known-good alignment: */
4060 if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4062 *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4065 /* Copy protocol headers behind HW header: */
4066 skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4070 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4071 struct sk_buff *curr_skb,
4072 struct qeth_hdr *curr_hdr)
4074 struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4075 struct qeth_hdr *prev_hdr = queue->prev_hdr;
4080 /* All packets must have the same target: */
4081 if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4082 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4084 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4085 eth_hdr(curr_skb)->h_dest) &&
4086 qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4089 return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4090 qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4094 * qeth_fill_buffer() - map skb into an output buffer
4095 * @buf: buffer to transport the skb
4096 * @skb: skb to map into the buffer
4097 * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated
4098 * from qeth_core_header_cache.
4099 * @offset: when mapping the skb, start at skb->data + offset
4100 * @hd_len: if > 0, build a dedicated header element of this size
4102 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4103 struct sk_buff *skb, struct qeth_hdr *hdr,
4104 unsigned int offset, unsigned int hd_len)
4106 struct qdio_buffer *buffer = buf->buffer;
4107 int element = buf->next_element_to_fill;
4108 int length = skb_headlen(skb) - offset;
4109 char *data = skb->data + offset;
4110 unsigned int elem_length, cnt;
4111 bool is_first_elem = true;
4113 __skb_queue_tail(&buf->skb_list, skb);
4115 /* build dedicated element for HW Header */
4117 is_first_elem = false;
4119 buffer->element[element].addr = virt_to_phys(hdr);
4120 buffer->element[element].length = hd_len;
4121 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4123 /* HW header is allocated from cache: */
4124 if ((void *)hdr != skb->data)
4125 buf->is_header[element] = 1;
4126 /* HW header was pushed and is contiguous with linear part: */
4127 else if (length > 0 && !PAGE_ALIGNED(data) &&
4128 (data == (char *)hdr + hd_len))
4129 buffer->element[element].eflags |=
4130 SBAL_EFLAGS_CONTIGUOUS;
4135 /* map linear part into buffer element(s) */
4136 while (length > 0) {
4137 elem_length = min_t(unsigned int, length,
4138 PAGE_SIZE - offset_in_page(data));
4140 buffer->element[element].addr = virt_to_phys(data);
4141 buffer->element[element].length = elem_length;
4142 length -= elem_length;
4143 if (is_first_elem) {
4144 is_first_elem = false;
4145 if (length || skb_is_nonlinear(skb))
4146 /* skb needs additional elements */
4147 buffer->element[element].eflags =
4148 SBAL_EFLAGS_FIRST_FRAG;
4150 buffer->element[element].eflags = 0;
4152 buffer->element[element].eflags =
4153 SBAL_EFLAGS_MIDDLE_FRAG;
4156 data += elem_length;
4160 /* map page frags into buffer element(s) */
4161 for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4162 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4164 data = skb_frag_address(frag);
4165 length = skb_frag_size(frag);
4166 while (length > 0) {
4167 elem_length = min_t(unsigned int, length,
4168 PAGE_SIZE - offset_in_page(data));
4170 buffer->element[element].addr = virt_to_phys(data);
4171 buffer->element[element].length = elem_length;
4172 buffer->element[element].eflags =
4173 SBAL_EFLAGS_MIDDLE_FRAG;
4175 length -= elem_length;
4176 data += elem_length;
4181 if (buffer->element[element - 1].eflags)
4182 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4183 buf->next_element_to_fill = element;
4187 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4188 struct sk_buff *skb, unsigned int elements,
4189 struct qeth_hdr *hdr, unsigned int offset,
4190 unsigned int hd_len)
4192 unsigned int bytes = qdisc_pkt_len(skb);
4193 struct qeth_qdio_out_buffer *buffer;
4194 unsigned int next_element;
4195 struct netdev_queue *txq;
4196 bool stopped = false;
4199 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4200 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4202 /* Just a sanity check, the wake/stop logic should ensure that we always
4203 * get a free buffer.
4205 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4208 flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4211 (buffer->next_element_to_fill + elements > queue->max_elements)) {
4212 if (buffer->next_element_to_fill > 0) {
4213 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4214 queue->bulk_count++;
4217 if (queue->bulk_count >= queue->bulk_max)
4221 qeth_flush_queue(queue);
4223 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4224 queue->bulk_count)];
4226 /* Sanity-check again: */
4227 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4231 if (buffer->next_element_to_fill == 0 &&
4232 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4233 /* If a TX completion happens right _here_ and misses to wake
4234 * the txq, then our re-check below will catch the race.
4236 QETH_TXQ_STAT_INC(queue, stopped);
4237 netif_tx_stop_queue(txq);
4241 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4242 buffer->bytes += bytes;
4243 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4244 queue->prev_hdr = hdr;
4246 flush = __netdev_tx_sent_queue(txq, bytes,
4247 !stopped && netdev_xmit_more());
4249 if (flush || next_element >= queue->max_elements) {
4250 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4251 queue->bulk_count++;
4253 if (queue->bulk_count >= queue->bulk_max)
4257 qeth_flush_queue(queue);
4260 if (stopped && !qeth_out_queue_is_full(queue))
4261 netif_tx_start_queue(txq);
4265 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4266 struct sk_buff *skb, struct qeth_hdr *hdr,
4267 unsigned int offset, unsigned int hd_len,
4268 int elements_needed)
4270 struct qeth_qdio_out_buffer *buffer;
4271 unsigned int next_element;
4272 struct netdev_queue *txq;
4273 bool stopped = false;
4275 int flush_count = 0;
4280 /* spin until we get the queue ... */
4281 while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4282 QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4283 start_index = queue->next_buf_to_fill;
4284 buffer = queue->bufs[queue->next_buf_to_fill];
4286 /* Just a sanity check, the wake/stop logic should ensure that we always
4287 * get a free buffer.
4289 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4290 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4294 txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4296 /* check if we need to switch packing state of this queue */
4297 qeth_switch_to_packing_if_needed(queue);
4298 if (queue->do_pack) {
4300 /* does packet fit in current buffer? */
4301 if (buffer->next_element_to_fill + elements_needed >
4302 queue->max_elements) {
4303 /* ... no -> set state PRIMED */
4304 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4306 queue->next_buf_to_fill =
4307 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4308 buffer = queue->bufs[queue->next_buf_to_fill];
4310 /* We stepped forward, so sanity-check again: */
4311 if (atomic_read(&buffer->state) !=
4312 QETH_QDIO_BUF_EMPTY) {
4313 qeth_flush_buffers(queue, start_index,
4315 atomic_set(&queue->state,
4316 QETH_OUT_Q_UNLOCKED);
4323 if (buffer->next_element_to_fill == 0 &&
4324 atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4325 /* If a TX completion happens right _here_ and misses to wake
4326 * the txq, then our re-check below will catch the race.
4328 QETH_TXQ_STAT_INC(queue, stopped);
4329 netif_tx_stop_queue(txq);
4333 next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4334 buffer->bytes += qdisc_pkt_len(skb);
4335 buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4338 QETH_TXQ_STAT_INC(queue, skbs_pack);
4339 if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4341 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4342 queue->next_buf_to_fill =
4343 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4347 qeth_flush_buffers(queue, start_index, flush_count);
4348 else if (!atomic_read(&queue->set_pci_flags_count))
4349 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4351 * queue->state will go from LOCKED -> UNLOCKED or from
4352 * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4353 * (switch packing state or flush buffer to get another pci flag out).
4354 * In that case we will enter this loop
4356 while (atomic_dec_return(&queue->state)) {
4357 start_index = queue->next_buf_to_fill;
4358 /* check if we can go back to non-packing state */
4359 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4361 * check if we need to flush a packing buffer to get a pci
4362 * flag out on the queue
4364 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4365 tmp = qeth_prep_flush_pack_buffer(queue);
4367 qeth_flush_buffers(queue, start_index, tmp);
4372 /* at this point the queue is UNLOCKED again */
4374 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4376 if (stopped && !qeth_out_queue_is_full(queue))
4377 netif_tx_start_queue(txq);
4380 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4382 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4383 unsigned int payload_len, struct sk_buff *skb,
4384 unsigned int proto_len)
4386 struct qeth_hdr_ext_tso *ext = &hdr->ext;
4388 ext->hdr_tot_len = sizeof(*ext);
4389 ext->imb_hdr_no = 1;
4391 ext->hdr_version = 1;
4393 ext->payload_len = payload_len;
4394 ext->mss = skb_shinfo(skb)->gso_size;
4395 ext->dg_hdr_len = proto_len;
4398 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4399 struct qeth_qdio_out_q *queue, int ipv,
4400 void (*fill_header)(struct qeth_qdio_out_q *queue,
4401 struct qeth_hdr *hdr, struct sk_buff *skb,
4402 int ipv, unsigned int data_len))
4404 unsigned int proto_len, hw_hdr_len;
4405 unsigned int frame_len = skb->len;
4406 bool is_tso = skb_is_gso(skb);
4407 unsigned int data_offset = 0;
4408 struct qeth_hdr *hdr = NULL;
4409 unsigned int hd_len = 0;
4410 unsigned int elements;
4414 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4415 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4417 hw_hdr_len = sizeof(struct qeth_hdr);
4418 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4421 rc = skb_cow_head(skb, hw_hdr_len);
4425 push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4429 if (is_tso || !push_len) {
4430 /* HW header needs its own buffer element. */
4431 hd_len = hw_hdr_len + proto_len;
4432 data_offset = push_len + proto_len;
4434 memset(hdr, 0, hw_hdr_len);
4435 fill_header(queue, hdr, skb, ipv, frame_len);
4437 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4438 frame_len - proto_len, skb, proto_len);
4441 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4444 /* TODO: drop skb_orphan() once TX completion is fast enough */
4446 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4450 if (rc && !push_len)
4451 kmem_cache_free(qeth_core_header_cache, hdr);
4455 EXPORT_SYMBOL_GPL(qeth_xmit);
4457 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4458 struct qeth_reply *reply, unsigned long data)
4460 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4461 struct qeth_ipacmd_setadpparms *setparms;
4463 QETH_CARD_TEXT(card, 4, "prmadpcb");
4465 setparms = &(cmd->data.setadapterparms);
4466 if (qeth_setadpparms_inspect_rc(cmd)) {
4467 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4468 setparms->data.mode = SET_PROMISC_MODE_OFF;
4470 card->info.promisc_mode = setparms->data.mode;
4471 return (cmd->hdr.return_code) ? -EIO : 0;
4474 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4476 enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4477 SET_PROMISC_MODE_OFF;
4478 struct qeth_cmd_buffer *iob;
4479 struct qeth_ipa_cmd *cmd;
4481 QETH_CARD_TEXT(card, 4, "setprom");
4482 QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4484 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4485 SETADP_DATA_SIZEOF(mode));
4488 cmd = __ipa_cmd(iob);
4489 cmd->data.setadapterparms.data.mode = mode;
4490 qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4492 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4494 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4495 struct qeth_reply *reply, unsigned long data)
4497 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4498 struct qeth_ipacmd_setadpparms *adp_cmd;
4500 QETH_CARD_TEXT(card, 4, "chgmaccb");
4501 if (qeth_setadpparms_inspect_rc(cmd))
4504 adp_cmd = &cmd->data.setadapterparms;
4505 if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4506 return -EADDRNOTAVAIL;
4508 if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4509 !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4510 return -EADDRNOTAVAIL;
4512 ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4516 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4519 struct qeth_cmd_buffer *iob;
4520 struct qeth_ipa_cmd *cmd;
4522 QETH_CARD_TEXT(card, 4, "chgmac");
4524 iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4525 SETADP_DATA_SIZEOF(change_addr));
4528 cmd = __ipa_cmd(iob);
4529 cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4530 cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4531 ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4532 card->dev->dev_addr);
4533 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4537 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4539 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4540 struct qeth_reply *reply, unsigned long data)
4542 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4543 struct qeth_set_access_ctrl *access_ctrl_req;
4544 int fallback = *(int *)reply->param;
4546 QETH_CARD_TEXT(card, 4, "setaccb");
4548 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4549 QETH_CARD_TEXT_(card, 2, "rc=%d",
4550 cmd->data.setadapterparms.hdr.return_code);
4551 if (cmd->data.setadapterparms.hdr.return_code !=
4552 SET_ACCESS_CTRL_RC_SUCCESS)
4553 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4554 access_ctrl_req->subcmd_code, CARD_DEVID(card),
4555 cmd->data.setadapterparms.hdr.return_code);
4556 switch (qeth_setadpparms_inspect_rc(cmd)) {
4557 case SET_ACCESS_CTRL_RC_SUCCESS:
4558 if (card->options.isolation == ISOLATION_MODE_NONE) {
4559 dev_info(&card->gdev->dev,
4560 "QDIO data connection isolation is deactivated\n");
4562 dev_info(&card->gdev->dev,
4563 "QDIO data connection isolation is activated\n");
4566 case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4567 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4570 card->options.isolation = card->options.prev_isolation;
4572 case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4573 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4576 card->options.isolation = card->options.prev_isolation;
4578 case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4579 dev_err(&card->gdev->dev, "Adapter does not "
4580 "support QDIO data connection isolation\n");
4582 case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4583 dev_err(&card->gdev->dev,
4584 "Adapter is dedicated. "
4585 "QDIO data connection isolation not supported\n");
4587 card->options.isolation = card->options.prev_isolation;
4589 case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4590 dev_err(&card->gdev->dev,
4591 "TSO does not permit QDIO data connection isolation\n");
4593 card->options.isolation = card->options.prev_isolation;
4595 case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4596 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4597 "support reflective relay mode\n");
4599 card->options.isolation = card->options.prev_isolation;
4601 case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4602 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4603 "enabled at the adjacent switch port");
4605 card->options.isolation = card->options.prev_isolation;
4607 case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4608 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4609 "at the adjacent switch failed\n");
4612 /* this should never happen */
4614 card->options.isolation = card->options.prev_isolation;
4617 return (cmd->hdr.return_code) ? -EIO : 0;
4620 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4621 enum qeth_ipa_isolation_modes isolation, int fallback)
4624 struct qeth_cmd_buffer *iob;
4625 struct qeth_ipa_cmd *cmd;
4626 struct qeth_set_access_ctrl *access_ctrl_req;
4628 QETH_CARD_TEXT(card, 4, "setacctl");
4630 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4631 SETADP_DATA_SIZEOF(set_access_ctrl));
4634 cmd = __ipa_cmd(iob);
4635 access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4636 access_ctrl_req->subcmd_code = isolation;
4638 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4640 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4644 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4648 QETH_CARD_TEXT(card, 4, "setactlo");
4650 if ((IS_OSD(card) || IS_OSX(card)) &&
4651 qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4652 rc = qeth_setadpparms_set_access_ctrl(card,
4653 card->options.isolation, fallback);
4655 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4656 rc, CARD_DEVID(card));
4659 } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4660 card->options.isolation = ISOLATION_MODE_NONE;
4662 dev_err(&card->gdev->dev, "Adapter does not "
4663 "support QDIO data connection isolation\n");
4669 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4671 struct qeth_card *card;
4673 card = dev->ml_priv;
4674 QETH_CARD_TEXT(card, 4, "txtimeo");
4675 qeth_schedule_recovery(card);
4677 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4679 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4681 struct qeth_card *card = dev->ml_priv;
4685 case MII_BMCR: /* Basic mode control register */
4687 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4688 (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4689 (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4690 (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4691 rc |= BMCR_SPEED100;
4693 case MII_BMSR: /* Basic mode status register */
4694 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4695 BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4698 case MII_PHYSID1: /* PHYS ID 1 */
4699 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4701 rc = (rc >> 5) & 0xFFFF;
4703 case MII_PHYSID2: /* PHYS ID 2 */
4704 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4706 case MII_ADVERTISE: /* Advertisement control reg */
4709 case MII_LPA: /* Link partner ability reg */
4710 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4711 LPA_100BASE4 | LPA_LPACK;
4713 case MII_EXPANSION: /* Expansion register */
4715 case MII_DCOUNTER: /* disconnect counter */
4717 case MII_FCSCOUNTER: /* false carrier counter */
4719 case MII_NWAYTEST: /* N-way auto-neg test register */
4721 case MII_RERRCOUNTER: /* rx error counter */
4722 rc = card->stats.rx_length_errors +
4723 card->stats.rx_frame_errors +
4724 card->stats.rx_fifo_errors;
4726 case MII_SREVISION: /* silicon revision */
4728 case MII_RESV1: /* reserved 1 */
4730 case MII_LBRERROR: /* loopback, rx, bypass error */
4732 case MII_PHYADDR: /* physical address */
4734 case MII_RESV2: /* reserved 2 */
4736 case MII_TPISTATUS: /* TPI status for 10mbps */
4738 case MII_NCONFIG: /* network interface config */
4746 static int qeth_snmp_command_cb(struct qeth_card *card,
4747 struct qeth_reply *reply, unsigned long data)
4749 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4750 struct qeth_arp_query_info *qinfo = reply->param;
4751 struct qeth_ipacmd_setadpparms *adp_cmd;
4752 unsigned int data_len;
4755 QETH_CARD_TEXT(card, 3, "snpcmdcb");
4757 if (cmd->hdr.return_code) {
4758 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4761 if (cmd->data.setadapterparms.hdr.return_code) {
4762 cmd->hdr.return_code =
4763 cmd->data.setadapterparms.hdr.return_code;
4764 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4768 adp_cmd = &cmd->data.setadapterparms;
4769 data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4770 if (adp_cmd->hdr.seq_no == 1) {
4771 snmp_data = &adp_cmd->data.snmp;
4773 snmp_data = &adp_cmd->data.snmp.request;
4774 data_len -= offsetof(struct qeth_snmp_cmd, request);
4777 /* check if there is enough room in userspace */
4778 if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4779 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4782 QETH_CARD_TEXT_(card, 4, "snore%i",
4783 cmd->data.setadapterparms.hdr.used_total);
4784 QETH_CARD_TEXT_(card, 4, "sseqn%i",
4785 cmd->data.setadapterparms.hdr.seq_no);
4786 /*copy entries to user buffer*/
4787 memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4788 qinfo->udata_offset += data_len;
4790 if (cmd->data.setadapterparms.hdr.seq_no <
4791 cmd->data.setadapterparms.hdr.used_total)
4796 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4798 struct qeth_snmp_ureq __user *ureq;
4799 struct qeth_cmd_buffer *iob;
4800 unsigned int req_len;
4801 struct qeth_arp_query_info qinfo = {0, };
4804 QETH_CARD_TEXT(card, 3, "snmpcmd");
4806 if (IS_VM_NIC(card))
4809 if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4813 ureq = (struct qeth_snmp_ureq __user *) udata;
4814 if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4815 get_user(req_len, &ureq->hdr.req_len))
4818 /* Sanitize user input, to avoid overflows in iob size calculation: */
4819 if (req_len > QETH_BUFSIZE)
4822 iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4826 if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4827 &ureq->cmd, req_len)) {
4832 qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4837 qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4839 rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4841 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4842 CARD_DEVID(card), rc);
4844 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4852 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4853 struct qeth_reply *reply, unsigned long data)
4855 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4856 struct qeth_qoat_priv *priv;
4860 QETH_CARD_TEXT(card, 3, "qoatcb");
4861 if (qeth_setadpparms_inspect_rc(cmd))
4864 priv = (struct qeth_qoat_priv *)reply->param;
4865 resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4866 resdata = (char *)data + 28;
4868 if (resdatalen > (priv->buffer_len - priv->response_len))
4871 memcpy((priv->buffer + priv->response_len), resdata,
4873 priv->response_len += resdatalen;
4875 if (cmd->data.setadapterparms.hdr.seq_no <
4876 cmd->data.setadapterparms.hdr.used_total)
4881 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4884 struct qeth_cmd_buffer *iob;
4885 struct qeth_ipa_cmd *cmd;
4886 struct qeth_query_oat *oat_req;
4887 struct qeth_query_oat_data oat_data;
4888 struct qeth_qoat_priv priv;
4891 QETH_CARD_TEXT(card, 3, "qoatcmd");
4893 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4898 if (copy_from_user(&oat_data, udata,
4899 sizeof(struct qeth_query_oat_data))) {
4904 priv.buffer_len = oat_data.buffer_len;
4905 priv.response_len = 0;
4906 priv.buffer = vzalloc(oat_data.buffer_len);
4912 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4913 SETADP_DATA_SIZEOF(query_oat));
4918 cmd = __ipa_cmd(iob);
4919 oat_req = &cmd->data.setadapterparms.data.query_oat;
4920 oat_req->subcmd_code = oat_data.command;
4922 rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4925 if (is_compat_task())
4926 tmp = compat_ptr(oat_data.ptr);
4928 tmp = (void __user *)(unsigned long)oat_data.ptr;
4930 if (copy_to_user(tmp, priv.buffer,
4931 priv.response_len)) {
4936 oat_data.response_len = priv.response_len;
4938 if (copy_to_user(udata, &oat_data,
4939 sizeof(struct qeth_query_oat_data)))
4949 static int qeth_query_card_info_cb(struct qeth_card *card,
4950 struct qeth_reply *reply, unsigned long data)
4952 struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4953 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4954 struct qeth_query_card_info *card_info;
4956 QETH_CARD_TEXT(card, 2, "qcrdincb");
4957 if (qeth_setadpparms_inspect_rc(cmd))
4960 card_info = &cmd->data.setadapterparms.data.card_info;
4961 carrier_info->card_type = card_info->card_type;
4962 carrier_info->port_mode = card_info->port_mode;
4963 carrier_info->port_speed = card_info->port_speed;
4967 int qeth_query_card_info(struct qeth_card *card,
4968 struct carrier_info *carrier_info)
4970 struct qeth_cmd_buffer *iob;
4972 QETH_CARD_TEXT(card, 2, "qcrdinfo");
4973 if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4975 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4978 return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4979 (void *)carrier_info);
4983 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4984 * @card: pointer to a qeth_card
4987 * 0, if a MAC address has been set for the card's netdevice
4988 * a return code, for various error conditions
4990 int qeth_vm_request_mac(struct qeth_card *card)
4992 struct diag26c_mac_resp *response;
4993 struct diag26c_mac_req *request;
4994 struct ccw_dev_id id;
4997 QETH_CARD_TEXT(card, 2, "vmreqmac");
4999 request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5000 response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5001 if (!request || !response) {
5006 ccw_device_get_id(CARD_DDEV(card), &id);
5007 request->resp_buf_len = sizeof(*response);
5008 request->resp_version = DIAG26C_VERSION2;
5009 request->op_code = DIAG26C_GET_MAC;
5010 request->devno = id.devno;
5012 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5013 rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5014 QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5017 QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5019 if (request->resp_buf_len < sizeof(*response) ||
5020 response->version != request->resp_version) {
5022 QETH_CARD_TEXT(card, 2, "badresp");
5023 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5024 sizeof(request->resp_buf_len));
5025 } else if (!is_valid_ether_addr(response->mac)) {
5027 QETH_CARD_TEXT(card, 2, "badmac");
5028 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5030 ether_addr_copy(card->dev->dev_addr, response->mac);
5038 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5040 static void qeth_determine_capabilities(struct qeth_card *card)
5042 struct qeth_channel *channel = &card->data;
5043 struct ccw_device *ddev = channel->ccwdev;
5045 int ddev_offline = 0;
5047 QETH_CARD_TEXT(card, 2, "detcapab");
5048 if (!ddev->online) {
5050 rc = qeth_start_channel(channel);
5052 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5057 rc = qeth_read_conf_data(card);
5059 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5060 CARD_DEVID(card), rc);
5061 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5065 rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5067 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5069 QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5070 QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5071 QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5072 QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5073 QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5074 if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5075 ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5076 ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5077 dev_info(&card->gdev->dev,
5078 "Completion Queueing supported\n");
5080 card->options.cq = QETH_CQ_NOTAVAILABLE;
5085 if (ddev_offline == 1)
5086 qeth_stop_channel(channel);
5091 static int qeth_qdio_establish(struct qeth_card *card)
5093 struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5094 struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5095 struct qdio_initialize init_data;
5096 char *qib_param_field;
5100 QETH_CARD_TEXT(card, 2, "qdioest");
5102 qib_param_field = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5103 if (!qib_param_field) {
5105 goto out_free_nothing;
5108 qeth_create_qib_param_field(card, qib_param_field);
5109 qeth_create_qib_param_field_blkt(card, qib_param_field);
5111 in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5112 if (card->options.cq == QETH_CQ_ENABLED)
5113 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5115 for (i = 0; i < card->qdio.no_out_queues; i++)
5116 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5118 memset(&init_data, 0, sizeof(struct qdio_initialize));
5119 init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5121 init_data.qib_param_field_format = 0;
5122 init_data.qib_param_field = qib_param_field;
5123 init_data.no_input_qs = card->qdio.no_in_queues;
5124 init_data.no_output_qs = card->qdio.no_out_queues;
5125 init_data.input_handler = qeth_qdio_input_handler;
5126 init_data.output_handler = qeth_qdio_output_handler;
5127 init_data.irq_poll = qeth_qdio_poll;
5128 init_data.int_parm = (unsigned long) card;
5129 init_data.input_sbal_addr_array = in_sbal_ptrs;
5130 init_data.output_sbal_addr_array = out_sbal_ptrs;
5131 init_data.output_sbal_state_array = card->qdio.out_bufstates;
5132 init_data.scan_threshold = IS_IQD(card) ? 0 : 32;
5134 if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5135 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5136 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5137 init_data.no_output_qs);
5139 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5142 rc = qdio_establish(CARD_DDEV(card), &init_data);
5144 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5145 qdio_free(CARD_DDEV(card));
5149 switch (card->options.cq) {
5150 case QETH_CQ_ENABLED:
5151 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5153 case QETH_CQ_DISABLED:
5154 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5160 kfree(qib_param_field);
5165 static void qeth_core_free_card(struct qeth_card *card)
5167 QETH_CARD_TEXT(card, 2, "freecrd");
5169 unregister_service_level(&card->qeth_service_level);
5170 debugfs_remove_recursive(card->debugfs);
5171 qeth_put_cmd(card->read_cmd);
5172 destroy_workqueue(card->event_wq);
5173 dev_set_drvdata(&card->gdev->dev, NULL);
5177 void qeth_trace_features(struct qeth_card *card)
5179 QETH_CARD_TEXT(card, 2, "features");
5180 QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5181 QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5182 QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5183 QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5184 sizeof(card->info.diagass_support));
5186 EXPORT_SYMBOL_GPL(qeth_trace_features);
5188 static struct ccw_device_id qeth_ids[] = {
5189 {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5190 .driver_info = QETH_CARD_TYPE_OSD},
5191 {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5192 .driver_info = QETH_CARD_TYPE_IQD},
5193 #ifdef CONFIG_QETH_OSN
5194 {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5195 .driver_info = QETH_CARD_TYPE_OSN},
5197 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5198 .driver_info = QETH_CARD_TYPE_OSM},
5199 #ifdef CONFIG_QETH_OSX
5200 {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5201 .driver_info = QETH_CARD_TYPE_OSX},
5205 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5207 static struct ccw_driver qeth_ccw_driver = {
5209 .owner = THIS_MODULE,
5213 .probe = ccwgroup_probe_ccwdev,
5214 .remove = ccwgroup_remove_ccwdev,
5217 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5222 QETH_CARD_TEXT(card, 2, "hrdsetup");
5223 atomic_set(&card->force_alloc_skb, 0);
5224 rc = qeth_update_from_chp_desc(card);
5229 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5231 rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5232 qeth_stop_channel(&card->data);
5233 qeth_stop_channel(&card->write);
5234 qeth_stop_channel(&card->read);
5235 qdio_free(CARD_DDEV(card));
5237 rc = qeth_start_channel(&card->read);
5240 rc = qeth_start_channel(&card->write);
5243 rc = qeth_start_channel(&card->data);
5247 if (rc == -ERESTARTSYS) {
5248 QETH_CARD_TEXT(card, 2, "break1");
5251 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5258 qeth_determine_capabilities(card);
5259 qeth_idx_init(card);
5261 rc = qeth_idx_activate_read_channel(card);
5263 QETH_CARD_TEXT(card, 2, "break2");
5266 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5273 rc = qeth_idx_activate_write_channel(card);
5275 QETH_CARD_TEXT(card, 2, "break3");
5278 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5284 card->read_or_write_problem = 0;
5285 rc = qeth_mpc_initialize(card);
5287 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5291 rc = qeth_send_startlan(card);
5293 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5294 if (rc == -ENETDOWN) {
5295 dev_warn(&card->gdev->dev, "The LAN is offline\n");
5296 *carrier_ok = false;
5304 card->options.ipa4.supported = 0;
5305 card->options.ipa6.supported = 0;
5306 card->options.adp.supported = 0;
5307 card->options.sbp.supported_funcs = 0;
5308 card->info.diagass_support = 0;
5309 rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5312 if (qeth_is_supported(card, IPA_IPV6)) {
5313 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5317 if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5318 rc = qeth_query_setadapterparms(card);
5320 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5324 if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5325 rc = qeth_query_setdiagass(card);
5327 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5330 if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5331 (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5332 card->info.hwtrap = 0;
5334 rc = qeth_set_access_ctrl_online(card, 0);
5338 rc = qeth_init_qdio_queues(card);
5340 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5346 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5347 "an error on the device\n");
5348 QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5349 CARD_DEVID(card), rc);
5352 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5354 static int qeth_set_online(struct qeth_card *card)
5358 mutex_lock(&card->discipline_mutex);
5359 mutex_lock(&card->conf_mutex);
5360 QETH_CARD_TEXT(card, 2, "setonlin");
5362 rc = card->discipline->set_online(card);
5364 mutex_unlock(&card->conf_mutex);
5365 mutex_unlock(&card->discipline_mutex);
5370 int qeth_set_offline(struct qeth_card *card, bool resetting)
5374 mutex_lock(&card->discipline_mutex);
5375 mutex_lock(&card->conf_mutex);
5376 QETH_CARD_TEXT(card, 3, "setoffl");
5378 if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5379 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5380 card->info.hwtrap = 1;
5384 card->info.open_when_online = card->dev->flags & IFF_UP;
5385 dev_close(card->dev);
5386 netif_device_detach(card->dev);
5387 netif_carrier_off(card->dev);
5390 card->discipline->set_offline(card);
5392 rc = qeth_stop_channel(&card->data);
5393 rc2 = qeth_stop_channel(&card->write);
5394 rc3 = qeth_stop_channel(&card->read);
5396 rc = (rc2) ? rc2 : rc3;
5398 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5399 qdio_free(CARD_DDEV(card));
5401 /* let user_space know that device is offline */
5402 kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5404 mutex_unlock(&card->conf_mutex);
5405 mutex_unlock(&card->discipline_mutex);
5408 EXPORT_SYMBOL_GPL(qeth_set_offline);
5410 static int qeth_do_reset(void *data)
5412 struct qeth_card *card = data;
5415 QETH_CARD_TEXT(card, 2, "recover1");
5416 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5418 QETH_CARD_TEXT(card, 2, "recover2");
5419 dev_warn(&card->gdev->dev,
5420 "A recovery process has been started for the device\n");
5422 qeth_set_offline(card, true);
5423 rc = qeth_set_online(card);
5425 dev_info(&card->gdev->dev,
5426 "Device successfully recovered!\n");
5428 ccwgroup_set_offline(card->gdev);
5429 dev_warn(&card->gdev->dev,
5430 "The qeth device driver failed to recover an error on the device\n");
5432 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5433 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5437 #if IS_ENABLED(CONFIG_QETH_L3)
5438 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5439 struct qeth_hdr *hdr)
5441 struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5442 struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5443 struct net_device *dev = skb->dev;
5445 if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5446 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5447 "FAKELL", skb->len);
5451 if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5452 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5454 unsigned char tg_addr[ETH_ALEN];
5456 skb_reset_network_header(skb);
5457 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5458 case QETH_CAST_MULTICAST:
5459 if (prot == ETH_P_IP)
5460 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5462 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5463 QETH_CARD_STAT_INC(card, rx_multicast);
5465 case QETH_CAST_BROADCAST:
5466 ether_addr_copy(tg_addr, dev->broadcast);
5467 QETH_CARD_STAT_INC(card, rx_multicast);
5470 if (card->options.sniffer)
5471 skb->pkt_type = PACKET_OTHERHOST;
5472 ether_addr_copy(tg_addr, dev->dev_addr);
5475 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5476 dev_hard_header(skb, dev, prot, tg_addr,
5477 &l3_hdr->next_hop.rx.src_mac, skb->len);
5479 dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5483 /* copy VLAN tag from hdr into skb */
5484 if (!card->options.sniffer &&
5485 (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5486 QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5487 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5489 l3_hdr->next_hop.rx.vlan_id;
5491 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5496 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5497 struct qeth_hdr *hdr, bool uses_frags)
5499 struct napi_struct *napi = &card->napi;
5502 switch (hdr->hdr.l2.id) {
5503 case QETH_HEADER_TYPE_OSN:
5504 skb_push(skb, sizeof(*hdr));
5505 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5506 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5507 QETH_CARD_STAT_INC(card, rx_packets);
5509 card->osn_info.data_cb(skb);
5511 #if IS_ENABLED(CONFIG_QETH_L3)
5512 case QETH_HEADER_TYPE_LAYER3:
5513 qeth_l3_rebuild_skb(card, skb, hdr);
5514 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5517 case QETH_HEADER_TYPE_LAYER2:
5518 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5523 napi_free_frags(napi);
5525 dev_kfree_skb_any(skb);
5529 if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5530 skb->ip_summed = CHECKSUM_UNNECESSARY;
5531 QETH_CARD_STAT_INC(card, rx_skb_csum);
5533 skb->ip_summed = CHECKSUM_NONE;
5536 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5537 QETH_CARD_STAT_INC(card, rx_packets);
5538 if (skb_is_nonlinear(skb)) {
5539 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5540 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5541 skb_shinfo(skb)->nr_frags);
5545 napi_gro_frags(napi);
5547 skb->protocol = eth_type_trans(skb, skb->dev);
5548 napi_gro_receive(napi, skb);
5552 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5554 struct page *page = virt_to_page(data);
5555 unsigned int next_frag;
5557 next_frag = skb_shinfo(skb)->nr_frags;
5559 skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5563 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5565 return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5568 static int qeth_extract_skb(struct qeth_card *card,
5569 struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5572 struct qeth_priv *priv = netdev_priv(card->dev);
5573 struct qdio_buffer *buffer = qethbuffer->buffer;
5574 struct napi_struct *napi = &card->napi;
5575 struct qdio_buffer_element *element;
5576 unsigned int linear_len = 0;
5577 bool uses_frags = false;
5578 int offset = *__offset;
5579 bool use_rx_sg = false;
5580 unsigned int headroom;
5581 struct qeth_hdr *hdr;
5582 struct sk_buff *skb;
5585 element = &buffer->element[*element_no];
5588 /* qeth_hdr must not cross element boundaries */
5589 while (element->length < offset + sizeof(struct qeth_hdr)) {
5590 if (qeth_is_last_sbale(element))
5596 hdr = phys_to_virt(element->addr) + offset;
5597 offset += sizeof(*hdr);
5600 switch (hdr->hdr.l2.id) {
5601 case QETH_HEADER_TYPE_LAYER2:
5602 skb_len = hdr->hdr.l2.pkt_length;
5603 linear_len = ETH_HLEN;
5606 case QETH_HEADER_TYPE_LAYER3:
5607 skb_len = hdr->hdr.l3.length;
5608 if (!IS_LAYER3(card)) {
5609 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5613 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5614 linear_len = ETH_HLEN;
5619 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5620 linear_len = sizeof(struct ipv6hdr);
5622 linear_len = sizeof(struct iphdr);
5623 headroom = ETH_HLEN;
5625 case QETH_HEADER_TYPE_OSN:
5626 skb_len = hdr->hdr.osn.pdu_length;
5627 if (!IS_OSN(card)) {
5628 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5632 linear_len = skb_len;
5633 headroom = sizeof(struct qeth_hdr);
5636 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5637 QETH_CARD_STAT_INC(card, rx_frame_errors);
5639 QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5641 /* Can't determine packet length, drop the whole buffer. */
5642 return -EPROTONOSUPPORT;
5645 if (skb_len < linear_len) {
5646 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5650 use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5651 (skb_len > READ_ONCE(priv->rx_copybreak) &&
5652 !atomic_read(&card->force_alloc_skb) &&
5656 /* QETH_CQ_ENABLED only: */
5657 if (qethbuffer->rx_skb &&
5658 skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5659 skb = qethbuffer->rx_skb;
5660 qethbuffer->rx_skb = NULL;
5664 skb = napi_get_frags(napi);
5666 /* -ENOMEM, no point in falling back further. */
5667 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5671 if (skb_tailroom(skb) >= linear_len + headroom) {
5676 netdev_info_once(card->dev,
5677 "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5678 linear_len + headroom, skb_tailroom(skb));
5679 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5682 linear_len = skb_len;
5683 skb = napi_alloc_skb(napi, linear_len + headroom);
5685 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5691 skb_reserve(skb, headroom);
5694 int data_len = min(skb_len, (int)(element->length - offset));
5695 char *data = phys_to_virt(element->addr) + offset;
5697 skb_len -= data_len;
5700 /* Extract data from current element: */
5701 if (skb && data_len) {
5703 unsigned int copy_len;
5705 copy_len = min_t(unsigned int, linear_len,
5708 skb_put_data(skb, data, copy_len);
5709 linear_len -= copy_len;
5710 data_len -= copy_len;
5715 qeth_create_skb_frag(skb, data, data_len);
5718 /* Step forward to next element: */
5720 if (qeth_is_last_sbale(element)) {
5721 QETH_CARD_TEXT(card, 4, "unexeob");
5722 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5725 napi_free_frags(napi);
5727 dev_kfree_skb_any(skb);
5728 QETH_CARD_STAT_INC(card,
5738 /* This packet was skipped, go get another one: */
5742 *element_no = element - &buffer->element[0];
5745 qeth_receive_skb(card, skb, hdr, uses_frags);
5749 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5750 struct qeth_qdio_buffer *buf, bool *done)
5752 unsigned int work_done = 0;
5755 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5756 &card->rx.e_offset)) {
5768 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5770 unsigned int work_done = 0;
5772 while (budget > 0) {
5773 struct qeth_qdio_buffer *buffer;
5774 unsigned int skbs_done = 0;
5777 /* Fetch completed RX buffers: */
5778 if (!card->rx.b_count) {
5779 card->rx.qdio_err = 0;
5780 card->rx.b_count = qdio_get_next_buffers(
5781 card->data.ccwdev, 0, &card->rx.b_index,
5782 &card->rx.qdio_err);
5783 if (card->rx.b_count <= 0) {
5784 card->rx.b_count = 0;
5789 /* Process one completed RX buffer: */
5790 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5791 if (!(card->rx.qdio_err &&
5792 qeth_check_qdio_errors(card, buffer->buffer,
5793 card->rx.qdio_err, "qinerr")))
5794 skbs_done = qeth_extract_skbs(card, budget, buffer,
5799 work_done += skbs_done;
5800 budget -= skbs_done;
5803 QETH_CARD_STAT_INC(card, rx_bufs);
5804 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5805 qeth_queue_input_buffer(card, card->rx.b_index);
5808 /* Step forward to next buffer: */
5809 card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5810 card->rx.buf_element = 0;
5811 card->rx.e_offset = 0;
5818 static void qeth_cq_poll(struct qeth_card *card)
5820 unsigned int work_done = 0;
5822 while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5823 unsigned int start, error;
5826 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5831 qeth_qdio_cq_handler(card, error, 1, start, completed);
5832 work_done += completed;
5836 int qeth_poll(struct napi_struct *napi, int budget)
5838 struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5839 unsigned int work_done;
5841 work_done = qeth_rx_poll(card, budget);
5843 if (card->options.cq == QETH_CQ_ENABLED)
5846 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5847 if (budget && work_done >= budget)
5850 if (napi_complete_done(napi, work_done) &&
5851 qdio_start_irq(CARD_DDEV(card)))
5852 napi_schedule(napi);
5856 EXPORT_SYMBOL_GPL(qeth_poll);
5858 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5859 unsigned int bidx, bool error, int budget)
5861 struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5862 u8 sflags = buffer->buffer->element[15].sflags;
5863 struct qeth_card *card = queue->card;
5865 if (queue->bufstates && (queue->bufstates[bidx].flags &
5866 QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5867 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5869 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5870 QETH_QDIO_BUF_PENDING) ==
5871 QETH_QDIO_BUF_PRIMED)
5872 qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5874 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5876 /* prepare the queue slot for re-use: */
5877 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5878 if (qeth_init_qdio_out_buf(queue, bidx)) {
5879 QETH_CARD_TEXT(card, 2, "outofbuf");
5880 qeth_schedule_recovery(card);
5886 if (card->options.cq == QETH_CQ_ENABLED)
5887 qeth_notify_skbs(queue, buffer,
5888 qeth_compute_cq_notification(sflags, 0));
5889 qeth_clear_output_buffer(queue, buffer, error, budget);
5892 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5894 struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5895 unsigned int queue_no = queue->queue_no;
5896 struct qeth_card *card = queue->card;
5897 struct net_device *dev = card->dev;
5898 unsigned int work_done = 0;
5899 struct netdev_queue *txq;
5901 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5904 unsigned int start, error, i;
5905 unsigned int packets = 0;
5906 unsigned int bytes = 0;
5909 if (qeth_out_queue_is_empty(queue)) {
5910 napi_complete(napi);
5914 /* Give the CPU a breather: */
5915 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5916 QETH_TXQ_STAT_INC(queue, completion_yield);
5917 if (napi_complete_done(napi, 0))
5918 napi_schedule(napi);
5922 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5924 if (completed <= 0) {
5925 /* Ensure we see TX completion for pending work: */
5926 if (napi_complete_done(napi, 0))
5927 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
5931 for (i = start; i < start + completed; i++) {
5932 struct qeth_qdio_out_buffer *buffer;
5933 unsigned int bidx = QDIO_BUFNR(i);
5935 buffer = queue->bufs[bidx];
5936 packets += buffer->frames;
5937 bytes += buffer->bytes;
5939 qeth_handle_send_error(card, buffer, error);
5940 qeth_iqd_tx_complete(queue, bidx, error, budget);
5941 qeth_cleanup_handled_pending(queue, bidx, false);
5944 netdev_tx_completed_queue(txq, packets, bytes);
5945 atomic_sub(completed, &queue->used_buffers);
5946 work_done += completed;
5948 /* xmit may have observed the full-condition, but not yet
5949 * stopped the txq. In which case the code below won't trigger.
5950 * So before returning, xmit will re-check the txq's fill level
5951 * and wake it up if needed.
5953 if (netif_tx_queue_stopped(txq) &&
5954 !qeth_out_queue_is_full(queue))
5955 netif_tx_wake_queue(txq);
5959 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5961 if (!cmd->hdr.return_code)
5962 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5963 return cmd->hdr.return_code;
5966 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5967 struct qeth_reply *reply,
5970 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5971 struct qeth_ipa_caps *caps = reply->param;
5973 if (qeth_setassparms_inspect_rc(cmd))
5976 caps->supported = cmd->data.setassparms.data.caps.supported;
5977 caps->enabled = cmd->data.setassparms.data.caps.enabled;
5981 int qeth_setassparms_cb(struct qeth_card *card,
5982 struct qeth_reply *reply, unsigned long data)
5984 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5986 QETH_CARD_TEXT(card, 4, "defadpcb");
5988 if (cmd->hdr.return_code)
5991 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5992 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5993 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
5994 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5995 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
5998 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6000 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6001 enum qeth_ipa_funcs ipa_func,
6003 unsigned int data_length,
6004 enum qeth_prot_versions prot)
6006 struct qeth_ipacmd_setassparms *setassparms;
6007 struct qeth_ipacmd_setassparms_hdr *hdr;
6008 struct qeth_cmd_buffer *iob;
6010 QETH_CARD_TEXT(card, 4, "getasscm");
6011 iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6013 offsetof(struct qeth_ipacmd_setassparms,
6018 setassparms = &__ipa_cmd(iob)->data.setassparms;
6019 setassparms->assist_no = ipa_func;
6021 hdr = &setassparms->hdr;
6022 hdr->length = sizeof(*hdr) + data_length;
6023 hdr->command_code = cmd_code;
6026 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6028 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6029 enum qeth_ipa_funcs ipa_func,
6030 u16 cmd_code, u32 *data,
6031 enum qeth_prot_versions prot)
6033 unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6034 struct qeth_cmd_buffer *iob;
6036 QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6037 iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6042 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6043 return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6045 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6047 static void qeth_unregister_dbf_views(void)
6050 for (x = 0; x < QETH_DBF_INFOS; x++) {
6051 debug_unregister(qeth_dbf[x].id);
6052 qeth_dbf[x].id = NULL;
6056 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6058 char dbf_txt_buf[32];
6061 if (!debug_level_enabled(id, level))
6063 va_start(args, fmt);
6064 vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6066 debug_text_event(id, level, dbf_txt_buf);
6068 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6070 static int qeth_register_dbf_views(void)
6075 for (x = 0; x < QETH_DBF_INFOS; x++) {
6076 /* register the areas */
6077 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6081 if (qeth_dbf[x].id == NULL) {
6082 qeth_unregister_dbf_views();
6086 /* register a view */
6087 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6089 qeth_unregister_dbf_views();
6093 /* set a passing level */
6094 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6100 static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */
6102 int qeth_core_load_discipline(struct qeth_card *card,
6103 enum qeth_discipline_id discipline)
6105 mutex_lock(&qeth_mod_mutex);
6106 switch (discipline) {
6107 case QETH_DISCIPLINE_LAYER3:
6108 card->discipline = try_then_request_module(
6109 symbol_get(qeth_l3_discipline), "qeth_l3");
6111 case QETH_DISCIPLINE_LAYER2:
6112 card->discipline = try_then_request_module(
6113 symbol_get(qeth_l2_discipline), "qeth_l2");
6118 mutex_unlock(&qeth_mod_mutex);
6120 if (!card->discipline) {
6121 dev_err(&card->gdev->dev, "There is no kernel module to "
6122 "support discipline %d\n", discipline);
6126 card->options.layer = discipline;
6130 void qeth_core_free_discipline(struct qeth_card *card)
6132 if (IS_LAYER2(card))
6133 symbol_put(qeth_l2_discipline);
6135 symbol_put(qeth_l3_discipline);
6136 card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6137 card->discipline = NULL;
6140 const struct device_type qeth_generic_devtype = {
6141 .name = "qeth_generic",
6142 .groups = qeth_generic_attr_groups,
6144 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6146 static const struct device_type qeth_osn_devtype = {
6148 .groups = qeth_osn_attr_groups,
6151 #define DBF_NAME_LEN 20
6153 struct qeth_dbf_entry {
6154 char dbf_name[DBF_NAME_LEN];
6155 debug_info_t *dbf_info;
6156 struct list_head dbf_list;
6159 static LIST_HEAD(qeth_dbf_list);
6160 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6162 static debug_info_t *qeth_get_dbf_entry(char *name)
6164 struct qeth_dbf_entry *entry;
6165 debug_info_t *rc = NULL;
6167 mutex_lock(&qeth_dbf_list_mutex);
6168 list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6169 if (strcmp(entry->dbf_name, name) == 0) {
6170 rc = entry->dbf_info;
6174 mutex_unlock(&qeth_dbf_list_mutex);
6178 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6180 struct qeth_dbf_entry *new_entry;
6182 card->debug = debug_register(name, 2, 1, 8);
6184 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6187 if (debug_register_view(card->debug, &debug_hex_ascii_view))
6189 new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6192 strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6193 new_entry->dbf_info = card->debug;
6194 mutex_lock(&qeth_dbf_list_mutex);
6195 list_add(&new_entry->dbf_list, &qeth_dbf_list);
6196 mutex_unlock(&qeth_dbf_list_mutex);
6201 debug_unregister(card->debug);
6206 static void qeth_clear_dbf_list(void)
6208 struct qeth_dbf_entry *entry, *tmp;
6210 mutex_lock(&qeth_dbf_list_mutex);
6211 list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6212 list_del(&entry->dbf_list);
6213 debug_unregister(entry->dbf_info);
6216 mutex_unlock(&qeth_dbf_list_mutex);
6219 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6221 struct net_device *dev;
6222 struct qeth_priv *priv;
6224 switch (card->info.type) {
6225 case QETH_CARD_TYPE_IQD:
6226 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6227 ether_setup, QETH_MAX_OUT_QUEUES, 1);
6229 case QETH_CARD_TYPE_OSM:
6230 dev = alloc_etherdev(sizeof(*priv));
6232 case QETH_CARD_TYPE_OSN:
6233 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6237 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6243 priv = netdev_priv(dev);
6244 priv->rx_copybreak = QETH_RX_COPYBREAK;
6246 dev->ml_priv = card;
6247 dev->watchdog_timeo = QETH_TX_TIMEOUT;
6248 dev->min_mtu = IS_OSN(card) ? 64 : 576;
6249 /* initialized when device first goes online: */
6252 SET_NETDEV_DEV(dev, &card->gdev->dev);
6253 netif_carrier_off(dev);
6255 dev->ethtool_ops = IS_OSN(card) ? &qeth_osn_ethtool_ops :
6261 struct net_device *qeth_clone_netdev(struct net_device *orig)
6263 struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6268 clone->dev_port = orig->dev_port;
6272 int qeth_setup_netdev(struct qeth_card *card)
6274 struct net_device *dev = card->dev;
6275 unsigned int num_tx_queues;
6277 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6278 dev->hw_features |= NETIF_F_SG;
6279 dev->vlan_features |= NETIF_F_SG;
6282 dev->features |= NETIF_F_SG;
6283 num_tx_queues = QETH_IQD_MIN_TXQ;
6284 } else if (IS_VM_NIC(card)) {
6287 num_tx_queues = dev->real_num_tx_queues;
6290 return qeth_set_real_num_tx_queues(card, num_tx_queues);
6292 EXPORT_SYMBOL_GPL(qeth_setup_netdev);
6294 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6296 struct qeth_card *card;
6299 enum qeth_discipline_id enforced_disc;
6300 char dbf_name[DBF_NAME_LEN];
6302 QETH_DBF_TEXT(SETUP, 2, "probedev");
6305 if (!get_device(dev))
6308 QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6310 card = qeth_alloc_card(gdev);
6312 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6317 snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6318 dev_name(&gdev->dev));
6319 card->debug = qeth_get_dbf_entry(dbf_name);
6321 rc = qeth_add_dbf_entry(card, dbf_name);
6326 qeth_setup_card(card);
6327 card->dev = qeth_alloc_netdev(card);
6333 qeth_determine_capabilities(card);
6334 qeth_set_blkt_defaults(card);
6336 card->qdio.no_out_queues = card->dev->num_tx_queues;
6337 rc = qeth_update_from_chp_desc(card);
6341 enforced_disc = qeth_enforce_discipline(card);
6342 switch (enforced_disc) {
6343 case QETH_DISCIPLINE_UNDETERMINED:
6344 gdev->dev.type = &qeth_generic_devtype;
6347 card->info.layer_enforced = true;
6348 rc = qeth_core_load_discipline(card, enforced_disc);
6352 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6353 card->discipline->devtype;
6354 rc = card->discipline->setup(card->gdev);
6363 qeth_core_free_discipline(card);
6366 free_netdev(card->dev);
6368 qeth_core_free_card(card);
6374 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6376 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6378 QETH_CARD_TEXT(card, 2, "removedv");
6380 if (card->discipline) {
6381 card->discipline->remove(gdev);
6382 qeth_core_free_discipline(card);
6385 qeth_free_qdio_queues(card);
6387 free_netdev(card->dev);
6388 qeth_core_free_card(card);
6389 put_device(&gdev->dev);
6392 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6394 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6396 enum qeth_discipline_id def_discipline;
6398 if (!card->discipline) {
6399 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6400 QETH_DISCIPLINE_LAYER2;
6401 rc = qeth_core_load_discipline(card, def_discipline);
6404 rc = card->discipline->setup(card->gdev);
6406 qeth_core_free_discipline(card);
6411 rc = qeth_set_online(card);
6416 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6418 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6420 return qeth_set_offline(card, false);
6423 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6425 struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6426 qeth_set_allowed_threads(card, 0, 1);
6427 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6428 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6429 qeth_qdio_clear_card(card, 0);
6430 qeth_drain_output_queues(card);
6431 qdio_free(CARD_DDEV(card));
6434 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6439 err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6442 return err ? err : count;
6444 static DRIVER_ATTR_WO(group);
6446 static struct attribute *qeth_drv_attrs[] = {
6447 &driver_attr_group.attr,
6450 static struct attribute_group qeth_drv_attr_group = {
6451 .attrs = qeth_drv_attrs,
6453 static const struct attribute_group *qeth_drv_attr_groups[] = {
6454 &qeth_drv_attr_group,
6458 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6460 .groups = qeth_drv_attr_groups,
6461 .owner = THIS_MODULE,
6464 .ccw_driver = &qeth_ccw_driver,
6465 .setup = qeth_core_probe_device,
6466 .remove = qeth_core_remove_device,
6467 .set_online = qeth_core_set_online,
6468 .set_offline = qeth_core_set_offline,
6469 .shutdown = qeth_core_shutdown,
6472 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6474 struct ccwgroup_device *gdev;
6475 struct qeth_card *card;
6477 gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6481 card = dev_get_drvdata(&gdev->dev);
6482 put_device(&gdev->dev);
6485 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6487 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6489 struct qeth_card *card = dev->ml_priv;
6490 struct mii_ioctl_data *mii_data;
6494 case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6495 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6497 case SIOC_QETH_GET_CARD_TYPE:
6498 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6503 mii_data = if_mii(rq);
6504 mii_data->phy_id = 0;
6507 mii_data = if_mii(rq);
6508 if (mii_data->phy_id != 0)
6511 mii_data->val_out = qeth_mdio_read(dev,
6512 mii_data->phy_id, mii_data->reg_num);
6514 case SIOC_QETH_QUERY_OAT:
6515 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6518 if (card->discipline->do_ioctl)
6519 rc = card->discipline->do_ioctl(dev, rq, cmd);
6524 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6527 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6529 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6532 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6533 u32 *features = reply->param;
6535 if (qeth_setassparms_inspect_rc(cmd))
6538 *features = cmd->data.setassparms.data.flags_32bit;
6542 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6543 enum qeth_prot_versions prot)
6545 return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6549 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6550 enum qeth_prot_versions prot, u8 *lp2lp)
6552 u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6553 struct qeth_cmd_buffer *iob;
6554 struct qeth_ipa_caps caps;
6558 /* some L3 HW requires combined L3+L4 csum offload: */
6559 if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6560 cstype == IPA_OUTBOUND_CHECKSUM)
6561 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6563 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6568 rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6572 if ((required_features & features) != required_features) {
6573 qeth_set_csum_off(card, cstype, prot);
6577 iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6578 SETASS_DATA_SIZEOF(flags_32bit),
6581 qeth_set_csum_off(card, cstype, prot);
6585 if (features & QETH_IPA_CHECKSUM_LP2LP)
6586 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6587 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6588 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6590 qeth_set_csum_off(card, cstype, prot);
6594 if (!qeth_ipa_caps_supported(&caps, required_features) ||
6595 !qeth_ipa_caps_enabled(&caps, required_features)) {
6596 qeth_set_csum_off(card, cstype, prot);
6600 dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6601 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6604 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6609 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6610 enum qeth_prot_versions prot, u8 *lp2lp)
6612 return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6613 qeth_set_csum_off(card, cstype, prot);
6616 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6619 struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6620 struct qeth_tso_start_data *tso_data = reply->param;
6622 if (qeth_setassparms_inspect_rc(cmd))
6625 tso_data->mss = cmd->data.setassparms.data.tso.mss;
6626 tso_data->supported = cmd->data.setassparms.data.tso.supported;
6630 static int qeth_set_tso_off(struct qeth_card *card,
6631 enum qeth_prot_versions prot)
6633 return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6634 IPA_CMD_ASS_STOP, NULL, prot);
6637 static int qeth_set_tso_on(struct qeth_card *card,
6638 enum qeth_prot_versions prot)
6640 struct qeth_tso_start_data tso_data;
6641 struct qeth_cmd_buffer *iob;
6642 struct qeth_ipa_caps caps;
6645 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6646 IPA_CMD_ASS_START, 0, prot);
6650 rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6654 if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6655 qeth_set_tso_off(card, prot);
6659 iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6661 SETASS_DATA_SIZEOF(caps), prot);
6663 qeth_set_tso_off(card, prot);
6667 /* enable TSO capability */
6668 __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6669 QETH_IPA_LARGE_SEND_TCP;
6670 rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6672 qeth_set_tso_off(card, prot);
6676 if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6677 !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6678 qeth_set_tso_off(card, prot);
6682 dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6687 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6688 enum qeth_prot_versions prot)
6690 return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6693 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6695 int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6698 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6699 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6700 QETH_PROT_IPV4, NULL);
6701 if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6702 /* no/one Offload Assist available, so the rc is trivial */
6705 rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6706 QETH_PROT_IPV6, NULL);
6709 /* enable: success if any Assist is active */
6710 return (rc_ipv6) ? rc_ipv4 : 0;
6712 /* disable: failure if any Assist is still active */
6713 return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6717 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6718 * @dev: a net_device
6720 void qeth_enable_hw_features(struct net_device *dev)
6722 struct qeth_card *card = dev->ml_priv;
6723 netdev_features_t features;
6725 features = dev->features;
6726 /* force-off any feature that might need an IPA sequence.
6727 * netdev_update_features() will restart them.
6729 dev->features &= ~dev->hw_features;
6730 /* toggle VLAN filter, so that VIDs are re-programmed: */
6731 if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6732 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6733 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6735 netdev_update_features(dev);
6736 if (features != dev->features)
6737 dev_warn(&card->gdev->dev,
6738 "Device recovery failed to restore all offload features\n");
6740 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6742 static void qeth_check_restricted_features(struct qeth_card *card,
6743 netdev_features_t changed,
6744 netdev_features_t actual)
6746 netdev_features_t ipv6_features = NETIF_F_TSO6;
6747 netdev_features_t ipv4_features = NETIF_F_TSO;
6749 if (!card->info.has_lp2lp_cso_v6)
6750 ipv6_features |= NETIF_F_IPV6_CSUM;
6751 if (!card->info.has_lp2lp_cso_v4)
6752 ipv4_features |= NETIF_F_IP_CSUM;
6754 if ((changed & ipv6_features) && !(actual & ipv6_features))
6755 qeth_flush_local_addrs6(card);
6756 if ((changed & ipv4_features) && !(actual & ipv4_features))
6757 qeth_flush_local_addrs4(card);
6760 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6762 struct qeth_card *card = dev->ml_priv;
6763 netdev_features_t changed = dev->features ^ features;
6766 QETH_CARD_TEXT(card, 2, "setfeat");
6767 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6769 if ((changed & NETIF_F_IP_CSUM)) {
6770 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6771 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6772 &card->info.has_lp2lp_cso_v4);
6774 changed ^= NETIF_F_IP_CSUM;
6776 if (changed & NETIF_F_IPV6_CSUM) {
6777 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6778 IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6779 &card->info.has_lp2lp_cso_v6);
6781 changed ^= NETIF_F_IPV6_CSUM;
6783 if (changed & NETIF_F_RXCSUM) {
6784 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6786 changed ^= NETIF_F_RXCSUM;
6788 if (changed & NETIF_F_TSO) {
6789 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6792 changed ^= NETIF_F_TSO;
6794 if (changed & NETIF_F_TSO6) {
6795 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6798 changed ^= NETIF_F_TSO6;
6801 qeth_check_restricted_features(card, dev->features ^ features,
6802 dev->features ^ changed);
6804 /* everything changed successfully? */
6805 if ((dev->features ^ features) == changed)
6807 /* something went wrong. save changed features and return error */
6808 dev->features ^= changed;
6811 EXPORT_SYMBOL_GPL(qeth_set_features);
6813 netdev_features_t qeth_fix_features(struct net_device *dev,
6814 netdev_features_t features)
6816 struct qeth_card *card = dev->ml_priv;
6818 QETH_CARD_TEXT(card, 2, "fixfeat");
6819 if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6820 features &= ~NETIF_F_IP_CSUM;
6821 if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6822 features &= ~NETIF_F_IPV6_CSUM;
6823 if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6824 !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6825 features &= ~NETIF_F_RXCSUM;
6826 if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6827 features &= ~NETIF_F_TSO;
6828 if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6829 features &= ~NETIF_F_TSO6;
6831 QETH_CARD_HEX(card, 2, &features, sizeof(features));
6834 EXPORT_SYMBOL_GPL(qeth_fix_features);
6836 netdev_features_t qeth_features_check(struct sk_buff *skb,
6837 struct net_device *dev,
6838 netdev_features_t features)
6840 struct qeth_card *card = dev->ml_priv;
6842 /* Traffic with local next-hop is not eligible for some offloads: */
6843 if (skb->ip_summed == CHECKSUM_PARTIAL &&
6844 card->options.isolation != ISOLATION_MODE_FWD) {
6845 netdev_features_t restricted = 0;
6847 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6848 restricted |= NETIF_F_ALL_TSO;
6850 switch (vlan_get_protocol(skb)) {
6851 case htons(ETH_P_IP):
6852 if (!card->info.has_lp2lp_cso_v4)
6853 restricted |= NETIF_F_IP_CSUM;
6855 if (restricted && qeth_next_hop_is_local_v4(card, skb))
6856 features &= ~restricted;
6858 case htons(ETH_P_IPV6):
6859 if (!card->info.has_lp2lp_cso_v6)
6860 restricted |= NETIF_F_IPV6_CSUM;
6862 if (restricted && qeth_next_hop_is_local_v6(card, skb))
6863 features &= ~restricted;
6870 /* GSO segmentation builds skbs with
6871 * a (small) linear part for the headers, and
6872 * page frags for the data.
6873 * Compared to a linear skb, the header-only part consumes an
6874 * additional buffer element. This reduces buffer utilization, and
6875 * hurts throughput. So compress small segments into one element.
6877 if (netif_needs_gso(skb, features)) {
6878 /* match skb_segment(): */
6879 unsigned int doffset = skb->data - skb_mac_header(skb);
6880 unsigned int hsize = skb_shinfo(skb)->gso_size;
6881 unsigned int hroom = skb_headroom(skb);
6883 /* linearize only if resulting skb allocations are order-0: */
6884 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6885 features &= ~NETIF_F_SG;
6888 return vlan_features_check(skb, features);
6890 EXPORT_SYMBOL_GPL(qeth_features_check);
6892 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6894 struct qeth_card *card = dev->ml_priv;
6895 struct qeth_qdio_out_q *queue;
6898 QETH_CARD_TEXT(card, 5, "getstat");
6900 stats->rx_packets = card->stats.rx_packets;
6901 stats->rx_bytes = card->stats.rx_bytes;
6902 stats->rx_errors = card->stats.rx_length_errors +
6903 card->stats.rx_frame_errors +
6904 card->stats.rx_fifo_errors;
6905 stats->rx_dropped = card->stats.rx_dropped_nomem +
6906 card->stats.rx_dropped_notsupp +
6907 card->stats.rx_dropped_runt;
6908 stats->multicast = card->stats.rx_multicast;
6909 stats->rx_length_errors = card->stats.rx_length_errors;
6910 stats->rx_frame_errors = card->stats.rx_frame_errors;
6911 stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6913 for (i = 0; i < card->qdio.no_out_queues; i++) {
6914 queue = card->qdio.out_qs[i];
6916 stats->tx_packets += queue->stats.tx_packets;
6917 stats->tx_bytes += queue->stats.tx_bytes;
6918 stats->tx_errors += queue->stats.tx_errors;
6919 stats->tx_dropped += queue->stats.tx_dropped;
6922 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6924 #define TC_IQD_UCAST 0
6925 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6926 unsigned int ucast_txqs)
6930 /* IQD requires mcast traffic to be placed on a dedicated queue, and
6931 * qeth_iqd_select_queue() deals with this.
6932 * For unicast traffic, we defer the queue selection to the stack.
6933 * By installing a trivial prio map that spans over only the unicast
6934 * queues, we can encourage the stack to spread the ucast traffic evenly
6935 * without selecting the mcast queue.
6938 /* One traffic class, spanning over all active ucast queues: */
6939 netdev_set_num_tc(dev, 1);
6940 netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6941 QETH_IQD_MIN_UCAST_TXQ);
6943 /* Map all priorities to this traffic class: */
6944 for (prio = 0; prio <= TC_BITMASK; prio++)
6945 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6948 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6950 struct net_device *dev = card->dev;
6953 /* Per netif_setup_tc(), adjust the mapping first: */
6955 qeth_iqd_set_prio_tc_map(dev, count - 1);
6957 rc = netif_set_real_num_tx_queues(dev, count);
6959 if (rc && IS_IQD(card))
6960 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6965 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6966 u8 cast_type, struct net_device *sb_dev)
6970 if (cast_type != RTN_UNICAST)
6971 return QETH_IQD_MCAST_TXQ;
6972 if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
6973 return QETH_IQD_MIN_UCAST_TXQ;
6975 txq = netdev_pick_tx(dev, skb, sb_dev);
6976 return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
6978 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6980 int qeth_open(struct net_device *dev)
6982 struct qeth_card *card = dev->ml_priv;
6984 QETH_CARD_TEXT(card, 4, "qethopen");
6986 card->data.state = CH_STATE_UP;
6987 netif_tx_start_all_queues(dev);
6989 napi_enable(&card->napi);
6991 napi_schedule(&card->napi);
6993 struct qeth_qdio_out_q *queue;
6996 qeth_for_each_output_queue(card, queue, i) {
6997 netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6999 napi_enable(&queue->napi);
7000 napi_schedule(&queue->napi);
7003 /* kick-start the NAPI softirq: */
7007 EXPORT_SYMBOL_GPL(qeth_open);
7009 int qeth_stop(struct net_device *dev)
7011 struct qeth_card *card = dev->ml_priv;
7013 QETH_CARD_TEXT(card, 4, "qethstop");
7015 struct qeth_qdio_out_q *queue;
7018 /* Quiesce the NAPI instances: */
7019 qeth_for_each_output_queue(card, queue, i)
7020 napi_disable(&queue->napi);
7022 /* Stop .ndo_start_xmit, might still access queue->napi. */
7023 netif_tx_disable(dev);
7025 qeth_for_each_output_queue(card, queue, i) {
7026 del_timer_sync(&queue->timer);
7027 /* Queues may get re-allocated, so remove the NAPIs. */
7028 netif_napi_del(&queue->napi);
7031 netif_tx_disable(dev);
7034 napi_disable(&card->napi);
7035 qdio_stop_irq(CARD_DDEV(card));
7039 EXPORT_SYMBOL_GPL(qeth_stop);
7041 static int __init qeth_core_init(void)
7045 pr_info("loading core functions\n");
7047 qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7049 rc = qeth_register_dbf_views();
7052 qeth_core_root_dev = root_device_register("qeth");
7053 rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7056 qeth_core_header_cache =
7057 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7058 roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7060 if (!qeth_core_header_cache) {
7064 qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7065 sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7066 if (!qeth_qdio_outbuf_cache) {
7070 rc = ccw_driver_register(&qeth_ccw_driver);
7073 rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7080 ccw_driver_unregister(&qeth_ccw_driver);
7082 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7084 kmem_cache_destroy(qeth_core_header_cache);
7086 root_device_unregister(qeth_core_root_dev);
7088 qeth_unregister_dbf_views();
7090 debugfs_remove_recursive(qeth_debugfs_root);
7091 pr_err("Initializing the qeth device driver failed\n");
7095 static void __exit qeth_core_exit(void)
7097 qeth_clear_dbf_list();
7098 ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7099 ccw_driver_unregister(&qeth_ccw_driver);
7100 kmem_cache_destroy(qeth_qdio_outbuf_cache);
7101 kmem_cache_destroy(qeth_core_header_cache);
7102 root_device_unregister(qeth_core_root_dev);
7103 qeth_unregister_dbf_views();
7104 debugfs_remove_recursive(qeth_debugfs_root);
7105 pr_info("core functions removed\n");
7108 module_init(qeth_core_init);
7109 module_exit(qeth_core_exit);
7111 MODULE_DESCRIPTION("qeth core functions");
7112 MODULE_LICENSE("GPL");