1 /**************************************************************************/
3 /* IBM System i and System p Virtual NIC Device Driver */
4 /* Copyright (C) 2014 IBM Corp. */
5 /* Santiago Leon (santi_leon@yahoo.com) */
6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7 /* John Allen (jallen@linux.vnet.ibm.com) */
9 /* This program is free software; you can redistribute it and/or modify */
10 /* it under the terms of the GNU General Public License as published by */
11 /* the Free Software Foundation; either version 2 of the License, or */
12 /* (at your option) any later version. */
14 /* This program is distributed in the hope that it will be useful, */
15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17 /* GNU General Public License for more details. */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
22 /* This module contains the implementation of a virtual ethernet device */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24 /* option of the RS/6000 Platform Architecture to interface with virtual */
25 /* ethernet NICs that are presented to the partition by the hypervisor. */
27 /* Messages are passed between the VNIC driver and the VNIC server using */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31 /* are used by the driver to notify the server that a packet is */
32 /* ready for transmission or that a buffer has been added to receive a */
33 /* packet. Subsequently, sCRQs are used by the server to notify the */
34 /* driver that a packet transmission has been completed or that a packet */
35 /* has been received and placed in a waiting buffer. */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit */
39 /* or receive has been completed, the VNIC driver is required to use */
40 /* "long term mapping". This entails that large, continuous DMA mapped */
41 /* buffers are allocated on driver initialization and these buffers are */
42 /* then continuously reused to pass skbs to and from the VNIC server. */
44 /**************************************************************************/
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
64 #include <linux/ipv6.h>
65 #include <linux/irq.h>
66 #include <linux/kthread.h>
67 #include <linux/seq_file.h>
68 #include <linux/interrupt.h>
69 #include <net/net_namespace.h>
70 #include <asm/hvcall.h>
71 #include <linux/atomic.h>
73 #include <asm/iommu.h>
74 #include <linux/uaccess.h>
75 #include <asm/firmware.h>
76 #include <linux/workqueue.h>
77 #include <linux/if_vlan.h>
81 static const char ibmvnic_driver_name[] = "ibmvnic";
82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
84 MODULE_AUTHOR("Santiago Leon");
85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
90 static int ibmvnic_remove(struct vio_dev *);
91 static void release_sub_crqs(struct ibmvnic_adapter *);
92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
97 union sub_crq *sub_crq);
98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
100 static int enable_scrq_irq(struct ibmvnic_adapter *,
101 struct ibmvnic_sub_crq_queue *);
102 static int disable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int pending_scrq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static int ibmvnic_poll(struct napi_struct *napi, int data);
109 static void send_map_query(struct ibmvnic_adapter *adapter);
110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
111 static void send_request_unmap(struct ibmvnic_adapter *, u8);
112 static void send_login(struct ibmvnic_adapter *adapter);
113 static void send_cap_queries(struct ibmvnic_adapter *adapter);
114 static int init_sub_crqs(struct ibmvnic_adapter *);
115 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
116 static int ibmvnic_init(struct ibmvnic_adapter *);
117 static void release_crq_queue(struct ibmvnic_adapter *);
119 struct ibmvnic_stat {
120 char name[ETH_GSTRING_LEN];
124 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
125 offsetof(struct ibmvnic_statistics, stat))
126 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
128 static const struct ibmvnic_stat ibmvnic_stats[] = {
129 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
130 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
131 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
132 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
133 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
134 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
135 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
136 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
137 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
138 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
139 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
140 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
141 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
142 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
143 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
144 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
145 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
146 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
147 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
148 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
149 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
150 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
153 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
154 unsigned long length, unsigned long *number,
157 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
160 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
167 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
168 struct ibmvnic_long_term_buff *ltb, int size)
170 struct device *dev = &adapter->vdev->dev;
173 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
177 dev_err(dev, "Couldn't alloc long term buffer\n");
180 ltb->map_id = adapter->map_id;
183 init_completion(&adapter->fw_done);
184 send_request_map(adapter, ltb->addr,
185 ltb->size, ltb->map_id);
186 wait_for_completion(&adapter->fw_done);
188 if (adapter->fw_done_rc) {
189 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
190 adapter->fw_done_rc);
196 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
197 struct ibmvnic_long_term_buff *ltb)
199 struct device *dev = &adapter->vdev->dev;
204 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
205 adapter->reset_reason != VNIC_RESET_MOBILITY)
206 send_request_unmap(adapter, ltb->map_id);
207 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
210 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
211 struct ibmvnic_long_term_buff *ltb)
213 memset(ltb->buff, 0, ltb->size);
215 init_completion(&adapter->fw_done);
216 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
217 wait_for_completion(&adapter->fw_done);
219 if (adapter->fw_done_rc) {
220 dev_info(&adapter->vdev->dev,
221 "Reset failed, attempting to free and reallocate buffer\n");
222 free_long_term_buff(adapter, ltb);
223 return alloc_long_term_buff(adapter, ltb, ltb->size);
228 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
232 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
234 adapter->rx_pool[i].active = 0;
237 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
238 struct ibmvnic_rx_pool *pool)
240 int count = pool->size - atomic_read(&pool->available);
241 struct device *dev = &adapter->vdev->dev;
242 int buffers_added = 0;
243 unsigned long lpar_rc;
244 union sub_crq sub_crq;
257 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
258 be32_to_cpu(adapter->login_rsp_buf->
261 for (i = 0; i < count; ++i) {
262 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
264 dev_err(dev, "Couldn't replenish rx buff\n");
265 adapter->replenish_no_mem++;
269 index = pool->free_map[pool->next_free];
271 if (pool->rx_buff[index].skb)
272 dev_err(dev, "Inconsistent free_map!\n");
274 /* Copy the skb to the long term mapped DMA buffer */
275 offset = index * pool->buff_size;
276 dst = pool->long_term_buff.buff + offset;
277 memset(dst, 0, pool->buff_size);
278 dma_addr = pool->long_term_buff.addr + offset;
279 pool->rx_buff[index].data = dst;
281 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
282 pool->rx_buff[index].dma = dma_addr;
283 pool->rx_buff[index].skb = skb;
284 pool->rx_buff[index].pool_index = pool->index;
285 pool->rx_buff[index].size = pool->buff_size;
287 memset(&sub_crq, 0, sizeof(sub_crq));
288 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
289 sub_crq.rx_add.correlator =
290 cpu_to_be64((u64)&pool->rx_buff[index]);
291 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
292 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
294 /* The length field of the sCRQ is defined to be 24 bits so the
295 * buffer size needs to be left shifted by a byte before it is
296 * converted to big endian to prevent the last byte from being
299 #ifdef __LITTLE_ENDIAN__
302 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
304 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
306 if (lpar_rc != H_SUCCESS)
310 adapter->replenish_add_buff_success++;
311 pool->next_free = (pool->next_free + 1) % pool->size;
313 atomic_add(buffers_added, &pool->available);
317 dev_info(dev, "replenish pools failure\n");
318 pool->free_map[pool->next_free] = index;
319 pool->rx_buff[index].skb = NULL;
320 if (!dma_mapping_error(dev, dma_addr))
321 dma_unmap_single(dev, dma_addr, pool->buff_size,
324 dev_kfree_skb_any(skb);
325 adapter->replenish_add_buff_failure++;
326 atomic_add(buffers_added, &pool->available);
328 if (lpar_rc == H_CLOSED) {
329 /* Disable buffer pool replenishment and report carrier off if
330 * queue is closed. Firmware guarantees that a signal will
331 * be sent to the driver, triggering a reset.
333 deactivate_rx_pools(adapter);
334 netif_carrier_off(adapter->netdev);
338 static void replenish_pools(struct ibmvnic_adapter *adapter)
342 adapter->replenish_task_cycles++;
343 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
345 if (adapter->rx_pool[i].active)
346 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
350 static void release_stats_token(struct ibmvnic_adapter *adapter)
352 struct device *dev = &adapter->vdev->dev;
354 if (!adapter->stats_token)
357 dma_unmap_single(dev, adapter->stats_token,
358 sizeof(struct ibmvnic_statistics),
360 adapter->stats_token = 0;
363 static int init_stats_token(struct ibmvnic_adapter *adapter)
365 struct device *dev = &adapter->vdev->dev;
368 stok = dma_map_single(dev, &adapter->stats,
369 sizeof(struct ibmvnic_statistics),
371 if (dma_mapping_error(dev, stok)) {
372 dev_err(dev, "Couldn't map stats buffer\n");
376 adapter->stats_token = stok;
380 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
382 struct ibmvnic_rx_pool *rx_pool;
386 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
387 for (i = 0; i < rx_scrqs; i++) {
388 rx_pool = &adapter->rx_pool[i];
390 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
394 for (j = 0; j < rx_pool->size; j++)
395 rx_pool->free_map[j] = j;
397 memset(rx_pool->rx_buff, 0,
398 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
400 atomic_set(&rx_pool->available, 0);
401 rx_pool->next_alloc = 0;
402 rx_pool->next_free = 0;
409 static void release_rx_pools(struct ibmvnic_adapter *adapter)
411 struct ibmvnic_rx_pool *rx_pool;
415 if (!adapter->rx_pool)
418 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
419 for (i = 0; i < rx_scrqs; i++) {
420 rx_pool = &adapter->rx_pool[i];
422 kfree(rx_pool->free_map);
423 free_long_term_buff(adapter, &rx_pool->long_term_buff);
425 if (!rx_pool->rx_buff)
428 for (j = 0; j < rx_pool->size; j++) {
429 if (rx_pool->rx_buff[j].skb) {
430 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
431 rx_pool->rx_buff[i].skb = NULL;
435 kfree(rx_pool->rx_buff);
438 kfree(adapter->rx_pool);
439 adapter->rx_pool = NULL;
442 static int init_rx_pools(struct net_device *netdev)
444 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
445 struct device *dev = &adapter->vdev->dev;
446 struct ibmvnic_rx_pool *rx_pool;
452 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
453 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
454 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
456 adapter->rx_pool = kcalloc(rxadd_subcrqs,
457 sizeof(struct ibmvnic_rx_pool),
459 if (!adapter->rx_pool) {
460 dev_err(dev, "Failed to allocate rx pools\n");
464 for (i = 0; i < rxadd_subcrqs; i++) {
465 rx_pool = &adapter->rx_pool[i];
467 netdev_dbg(adapter->netdev,
468 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
469 i, adapter->req_rx_add_entries_per_subcrq,
470 be64_to_cpu(size_array[i]));
472 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
474 rx_pool->buff_size = be64_to_cpu(size_array[i]);
477 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
479 if (!rx_pool->free_map) {
480 release_rx_pools(adapter);
484 rx_pool->rx_buff = kcalloc(rx_pool->size,
485 sizeof(struct ibmvnic_rx_buff),
487 if (!rx_pool->rx_buff) {
488 dev_err(dev, "Couldn't alloc rx buffers\n");
489 release_rx_pools(adapter);
493 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
494 rx_pool->size * rx_pool->buff_size)) {
495 release_rx_pools(adapter);
499 for (j = 0; j < rx_pool->size; ++j)
500 rx_pool->free_map[j] = j;
502 atomic_set(&rx_pool->available, 0);
503 rx_pool->next_alloc = 0;
504 rx_pool->next_free = 0;
510 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
512 struct ibmvnic_tx_pool *tx_pool;
516 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
517 for (i = 0; i < tx_scrqs; i++) {
518 tx_pool = &adapter->tx_pool[i];
520 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
524 memset(tx_pool->tx_buff, 0,
525 adapter->req_tx_entries_per_subcrq *
526 sizeof(struct ibmvnic_tx_buff));
528 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
529 tx_pool->free_map[j] = j;
531 tx_pool->consumer_index = 0;
532 tx_pool->producer_index = 0;
538 static void release_tx_pools(struct ibmvnic_adapter *adapter)
540 struct ibmvnic_tx_pool *tx_pool;
543 if (!adapter->tx_pool)
546 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
547 for (i = 0; i < tx_scrqs; i++) {
548 tx_pool = &adapter->tx_pool[i];
549 kfree(tx_pool->tx_buff);
550 free_long_term_buff(adapter, &tx_pool->long_term_buff);
551 kfree(tx_pool->free_map);
554 kfree(adapter->tx_pool);
555 adapter->tx_pool = NULL;
558 static int init_tx_pools(struct net_device *netdev)
560 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
561 struct device *dev = &adapter->vdev->dev;
562 struct ibmvnic_tx_pool *tx_pool;
566 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
567 adapter->tx_pool = kcalloc(tx_subcrqs,
568 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
569 if (!adapter->tx_pool)
572 for (i = 0; i < tx_subcrqs; i++) {
573 tx_pool = &adapter->tx_pool[i];
574 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
575 sizeof(struct ibmvnic_tx_buff),
577 if (!tx_pool->tx_buff) {
578 dev_err(dev, "tx pool buffer allocation failed\n");
579 release_tx_pools(adapter);
583 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
584 adapter->req_tx_entries_per_subcrq *
586 release_tx_pools(adapter);
590 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
591 sizeof(int), GFP_KERNEL);
592 if (!tx_pool->free_map) {
593 release_tx_pools(adapter);
597 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
598 tx_pool->free_map[j] = j;
600 tx_pool->consumer_index = 0;
601 tx_pool->producer_index = 0;
607 static void release_error_buffers(struct ibmvnic_adapter *adapter)
609 struct device *dev = &adapter->vdev->dev;
610 struct ibmvnic_error_buff *error_buff, *tmp;
613 spin_lock_irqsave(&adapter->error_list_lock, flags);
614 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
615 list_del(&error_buff->list);
616 dma_unmap_single(dev, error_buff->dma, error_buff->len,
618 kfree(error_buff->buff);
621 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
624 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
628 if (adapter->napi_enabled)
631 for (i = 0; i < adapter->req_rx_queues; i++)
632 napi_enable(&adapter->napi[i]);
634 adapter->napi_enabled = true;
637 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
641 if (!adapter->napi_enabled)
644 for (i = 0; i < adapter->req_rx_queues; i++)
645 napi_disable(&adapter->napi[i]);
647 adapter->napi_enabled = false;
650 static int ibmvnic_login(struct net_device *netdev)
652 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
653 unsigned long timeout = msecs_to_jiffies(30000);
654 struct device *dev = &adapter->vdev->dev;
658 if (adapter->renegotiate) {
659 adapter->renegotiate = false;
660 release_sub_crqs(adapter);
662 reinit_completion(&adapter->init_done);
663 send_cap_queries(adapter);
664 if (!wait_for_completion_timeout(&adapter->init_done,
666 dev_err(dev, "Capabilities query timeout\n");
669 rc = init_sub_crqs(adapter);
672 "Initialization of SCRQ's failed\n");
675 rc = init_sub_crq_irqs(adapter);
678 "Initialization of SCRQ's irqs failed\n");
683 reinit_completion(&adapter->init_done);
685 if (!wait_for_completion_timeout(&adapter->init_done,
687 dev_err(dev, "Login timeout\n");
690 } while (adapter->renegotiate);
695 static void release_resources(struct ibmvnic_adapter *adapter)
699 release_tx_pools(adapter);
700 release_rx_pools(adapter);
702 release_stats_token(adapter);
703 release_error_buffers(adapter);
706 for (i = 0; i < adapter->req_rx_queues; i++) {
707 if (&adapter->napi[i])
708 netif_napi_del(&adapter->napi[i]);
713 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
715 struct net_device *netdev = adapter->netdev;
716 unsigned long timeout = msecs_to_jiffies(30000);
717 union ibmvnic_crq crq;
721 netdev_err(netdev, "setting link state %d\n", link_state);
722 memset(&crq, 0, sizeof(crq));
723 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
724 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
725 crq.logical_link_state.link_state = link_state;
730 reinit_completion(&adapter->init_done);
731 rc = ibmvnic_send_crq(adapter, &crq);
733 netdev_err(netdev, "Failed to set link state\n");
737 if (!wait_for_completion_timeout(&adapter->init_done,
739 netdev_err(netdev, "timeout setting link state\n");
743 if (adapter->init_done_rc == 1) {
744 /* Partuial success, delay and re-send */
753 static int set_real_num_queues(struct net_device *netdev)
755 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
758 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
760 netdev_err(netdev, "failed to set the number of tx queues\n");
764 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
766 netdev_err(netdev, "failed to set the number of rx queues\n");
771 static int init_resources(struct ibmvnic_adapter *adapter)
773 struct net_device *netdev = adapter->netdev;
776 rc = set_real_num_queues(netdev);
780 rc = init_stats_token(adapter);
785 adapter->napi = kcalloc(adapter->req_rx_queues,
786 sizeof(struct napi_struct), GFP_KERNEL);
790 for (i = 0; i < adapter->req_rx_queues; i++) {
791 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
795 send_map_query(adapter);
797 rc = init_rx_pools(netdev);
801 rc = init_tx_pools(netdev);
805 static int __ibmvnic_open(struct net_device *netdev)
807 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
808 enum vnic_state prev_state = adapter->state;
811 adapter->state = VNIC_OPENING;
812 replenish_pools(adapter);
813 ibmvnic_napi_enable(adapter);
815 /* We're ready to receive frames, enable the sub-crq interrupts and
816 * set the logical link state to up
818 for (i = 0; i < adapter->req_rx_queues; i++) {
819 if (prev_state == VNIC_CLOSED)
820 enable_irq(adapter->rx_scrq[i]->irq);
822 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
825 for (i = 0; i < adapter->req_tx_queues; i++) {
826 if (prev_state == VNIC_CLOSED)
827 enable_irq(adapter->tx_scrq[i]->irq);
829 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
832 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
834 for (i = 0; i < adapter->req_rx_queues; i++)
835 napi_disable(&adapter->napi[i]);
836 release_resources(adapter);
840 netif_tx_start_all_queues(netdev);
842 if (prev_state == VNIC_CLOSED) {
843 for (i = 0; i < adapter->req_rx_queues; i++)
844 napi_schedule(&adapter->napi[i]);
847 adapter->state = VNIC_OPEN;
851 static int ibmvnic_open(struct net_device *netdev)
853 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
856 mutex_lock(&adapter->reset_lock);
858 if (adapter->state != VNIC_CLOSED) {
859 rc = ibmvnic_login(netdev);
861 mutex_unlock(&adapter->reset_lock);
865 rc = init_resources(adapter);
867 netdev_err(netdev, "failed to initialize resources\n");
868 release_resources(adapter);
869 mutex_unlock(&adapter->reset_lock);
874 rc = __ibmvnic_open(netdev);
875 mutex_unlock(&adapter->reset_lock);
880 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
882 struct ibmvnic_tx_pool *tx_pool;
887 if (!adapter->tx_pool)
890 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
891 tx_entries = adapter->req_tx_entries_per_subcrq;
893 /* Free any remaining skbs in the tx buffer pools */
894 for (i = 0; i < tx_scrqs; i++) {
895 tx_pool = &adapter->tx_pool[i];
899 for (j = 0; j < tx_entries; j++) {
900 if (tx_pool->tx_buff[j].skb) {
901 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
902 tx_pool->tx_buff[j].skb = NULL;
908 static int __ibmvnic_close(struct net_device *netdev)
910 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
914 adapter->state = VNIC_CLOSING;
916 /* ensure that transmissions are stopped if called by do_reset */
917 if (adapter->resetting)
918 netif_tx_disable(netdev);
920 netif_tx_stop_all_queues(netdev);
922 ibmvnic_napi_disable(adapter);
924 if (adapter->tx_scrq) {
925 for (i = 0; i < adapter->req_tx_queues; i++)
926 if (adapter->tx_scrq[i]->irq)
927 disable_irq(adapter->tx_scrq[i]->irq);
930 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
934 if (adapter->rx_scrq) {
935 for (i = 0; i < adapter->req_rx_queues; i++) {
938 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
946 if (adapter->rx_scrq[i]->irq)
947 disable_irq(adapter->rx_scrq[i]->irq);
951 clean_tx_pools(adapter);
952 adapter->state = VNIC_CLOSED;
956 static int ibmvnic_close(struct net_device *netdev)
958 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
961 mutex_lock(&adapter->reset_lock);
962 rc = __ibmvnic_close(netdev);
963 mutex_unlock(&adapter->reset_lock);
969 * build_hdr_data - creates L2/L3/L4 header data buffer
970 * @hdr_field - bitfield determining needed headers
971 * @skb - socket buffer
972 * @hdr_len - array of header lengths
973 * @tot_len - total length of data
975 * Reads hdr_field to determine which headers are needed by firmware.
976 * Builds a buffer containing these headers. Saves individual header
977 * lengths and total buffer length to be used to build descriptors.
979 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
980 int *hdr_len, u8 *hdr_data)
985 hdr_len[0] = sizeof(struct ethhdr);
987 if (skb->protocol == htons(ETH_P_IP)) {
988 hdr_len[1] = ip_hdr(skb)->ihl * 4;
989 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
990 hdr_len[2] = tcp_hdrlen(skb);
991 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
992 hdr_len[2] = sizeof(struct udphdr);
993 } else if (skb->protocol == htons(ETH_P_IPV6)) {
994 hdr_len[1] = sizeof(struct ipv6hdr);
995 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
996 hdr_len[2] = tcp_hdrlen(skb);
997 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
998 hdr_len[2] = sizeof(struct udphdr);
1001 memset(hdr_data, 0, 120);
1002 if ((hdr_field >> 6) & 1) {
1003 hdr = skb_mac_header(skb);
1004 memcpy(hdr_data, hdr, hdr_len[0]);
1008 if ((hdr_field >> 5) & 1) {
1009 hdr = skb_network_header(skb);
1010 memcpy(hdr_data + len, hdr, hdr_len[1]);
1014 if ((hdr_field >> 4) & 1) {
1015 hdr = skb_transport_header(skb);
1016 memcpy(hdr_data + len, hdr, hdr_len[2]);
1023 * create_hdr_descs - create header and header extension descriptors
1024 * @hdr_field - bitfield determining needed headers
1025 * @data - buffer containing header data
1026 * @len - length of data buffer
1027 * @hdr_len - array of individual header lengths
1028 * @scrq_arr - descriptor array
1030 * Creates header and, if needed, header extension descriptors and
1031 * places them in a descriptor array, scrq_arr
1034 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1035 union sub_crq *scrq_arr)
1037 union sub_crq hdr_desc;
1042 while (tmp_len > 0) {
1043 cur = hdr_data + len - tmp_len;
1045 memset(&hdr_desc, 0, sizeof(hdr_desc));
1046 if (cur != hdr_data) {
1047 data = hdr_desc.hdr_ext.data;
1048 tmp = tmp_len > 29 ? 29 : tmp_len;
1049 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1050 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1051 hdr_desc.hdr_ext.len = tmp;
1053 data = hdr_desc.hdr.data;
1054 tmp = tmp_len > 24 ? 24 : tmp_len;
1055 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1056 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1057 hdr_desc.hdr.len = tmp;
1058 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1059 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1060 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1061 hdr_desc.hdr.flag = hdr_field << 1;
1063 memcpy(data, cur, tmp);
1065 *scrq_arr = hdr_desc;
1071 * build_hdr_descs_arr - build a header descriptor array
1072 * @skb - socket buffer
1073 * @num_entries - number of descriptors to be sent
1074 * @subcrq - first TX descriptor
1075 * @hdr_field - bit field determining which headers will be sent
1077 * This function will build a TX descriptor array with applicable
1078 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1081 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1082 int *num_entries, u8 hdr_field)
1084 int hdr_len[3] = {0, 0, 0};
1086 u8 *hdr_data = txbuff->hdr_data;
1088 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1093 num_entries += len % 29 ? len / 29 + 1 : len / 29;
1094 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1095 txbuff->indir_arr + 1);
1098 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1100 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1101 int queue_num = skb_get_queue_mapping(skb);
1102 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1103 struct device *dev = &adapter->vdev->dev;
1104 struct ibmvnic_tx_buff *tx_buff = NULL;
1105 struct ibmvnic_sub_crq_queue *tx_scrq;
1106 struct ibmvnic_tx_pool *tx_pool;
1107 unsigned int tx_send_failed = 0;
1108 unsigned int tx_map_failed = 0;
1109 unsigned int tx_dropped = 0;
1110 unsigned int tx_packets = 0;
1111 unsigned int tx_bytes = 0;
1112 dma_addr_t data_dma_addr;
1113 struct netdev_queue *txq;
1114 unsigned long lpar_rc;
1115 union sub_crq tx_crq;
1116 unsigned int offset;
1117 int num_entries = 1;
1123 if (adapter->resetting) {
1124 if (!netif_subqueue_stopped(netdev, skb))
1125 netif_stop_subqueue(netdev, queue_num);
1126 dev_kfree_skb_any(skb);
1134 tx_pool = &adapter->tx_pool[queue_num];
1135 tx_scrq = adapter->tx_scrq[queue_num];
1136 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1137 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1138 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1140 index = tx_pool->free_map[tx_pool->consumer_index];
1141 offset = index * adapter->req_mtu;
1142 dst = tx_pool->long_term_buff.buff + offset;
1143 memset(dst, 0, adapter->req_mtu);
1144 skb_copy_from_linear_data(skb, dst, skb->len);
1145 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1147 tx_pool->consumer_index =
1148 (tx_pool->consumer_index + 1) %
1149 adapter->req_tx_entries_per_subcrq;
1151 tx_buff = &tx_pool->tx_buff[index];
1153 tx_buff->data_dma[0] = data_dma_addr;
1154 tx_buff->data_len[0] = skb->len;
1155 tx_buff->index = index;
1156 tx_buff->pool_index = queue_num;
1157 tx_buff->last_frag = true;
1159 memset(&tx_crq, 0, sizeof(tx_crq));
1160 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1161 tx_crq.v1.type = IBMVNIC_TX_DESC;
1162 tx_crq.v1.n_crq_elem = 1;
1163 tx_crq.v1.n_sge = 1;
1164 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1165 tx_crq.v1.correlator = cpu_to_be32(index);
1166 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1167 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1168 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1170 if (adapter->vlan_header_insertion) {
1171 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1172 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1175 if (skb->protocol == htons(ETH_P_IP)) {
1176 if (ip_hdr(skb)->version == 4)
1177 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1178 else if (ip_hdr(skb)->version == 6)
1179 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1181 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1182 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1183 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1184 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1187 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1188 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1191 /* determine if l2/3/4 headers are sent to firmware */
1192 if ((*hdrs >> 7) & 1 &&
1193 (skb->protocol == htons(ETH_P_IP) ||
1194 skb->protocol == htons(ETH_P_IPV6))) {
1195 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1196 tx_crq.v1.n_crq_elem = num_entries;
1197 tx_buff->indir_arr[0] = tx_crq;
1198 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1199 sizeof(tx_buff->indir_arr),
1201 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1202 dev_kfree_skb_any(skb);
1203 tx_buff->skb = NULL;
1204 if (!firmware_has_feature(FW_FEATURE_CMO))
1205 dev_err(dev, "tx: unable to map descriptor array\n");
1211 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1212 (u64)tx_buff->indir_dma,
1215 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1218 if (lpar_rc != H_SUCCESS) {
1219 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1221 if (tx_pool->consumer_index == 0)
1222 tx_pool->consumer_index =
1223 adapter->req_tx_entries_per_subcrq - 1;
1225 tx_pool->consumer_index--;
1227 dev_kfree_skb_any(skb);
1228 tx_buff->skb = NULL;
1230 if (lpar_rc == H_CLOSED) {
1231 /* Disable TX and report carrier off if queue is closed.
1232 * Firmware guarantees that a signal will be sent to the
1233 * driver, triggering a reset or some other action.
1235 netif_tx_stop_all_queues(netdev);
1236 netif_carrier_off(netdev);
1245 if (atomic_inc_return(&tx_scrq->used)
1246 >= adapter->req_tx_entries_per_subcrq) {
1247 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1248 netif_stop_subqueue(netdev, queue_num);
1252 tx_bytes += skb->len;
1253 txq->trans_start = jiffies;
1257 netdev->stats.tx_dropped += tx_dropped;
1258 netdev->stats.tx_bytes += tx_bytes;
1259 netdev->stats.tx_packets += tx_packets;
1260 adapter->tx_send_failed += tx_send_failed;
1261 adapter->tx_map_failed += tx_map_failed;
1266 static void ibmvnic_set_multi(struct net_device *netdev)
1268 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1269 struct netdev_hw_addr *ha;
1270 union ibmvnic_crq crq;
1272 memset(&crq, 0, sizeof(crq));
1273 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1274 crq.request_capability.cmd = REQUEST_CAPABILITY;
1276 if (netdev->flags & IFF_PROMISC) {
1277 if (!adapter->promisc_supported)
1280 if (netdev->flags & IFF_ALLMULTI) {
1281 /* Accept all multicast */
1282 memset(&crq, 0, sizeof(crq));
1283 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1284 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1285 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1286 ibmvnic_send_crq(adapter, &crq);
1287 } else if (netdev_mc_empty(netdev)) {
1288 /* Reject all multicast */
1289 memset(&crq, 0, sizeof(crq));
1290 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1291 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1292 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1293 ibmvnic_send_crq(adapter, &crq);
1295 /* Accept one or more multicast(s) */
1296 netdev_for_each_mc_addr(ha, netdev) {
1297 memset(&crq, 0, sizeof(crq));
1298 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1299 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1300 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1301 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1303 ibmvnic_send_crq(adapter, &crq);
1309 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1311 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1312 struct sockaddr *addr = p;
1313 union ibmvnic_crq crq;
1315 if (!is_valid_ether_addr(addr->sa_data))
1316 return -EADDRNOTAVAIL;
1318 memset(&crq, 0, sizeof(crq));
1319 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1320 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1321 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1322 ibmvnic_send_crq(adapter, &crq);
1323 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1328 * do_reset returns zero if we are able to keep processing reset events, or
1329 * non-zero if we hit a fatal error and must halt.
1331 static int do_reset(struct ibmvnic_adapter *adapter,
1332 struct ibmvnic_rwi *rwi, u32 reset_state)
1334 struct net_device *netdev = adapter->netdev;
1337 netif_carrier_off(netdev);
1338 adapter->reset_reason = rwi->reset_reason;
1340 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1341 rc = ibmvnic_reenable_crq_queue(adapter);
1346 rc = __ibmvnic_close(netdev);
1350 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1351 /* remove the closed state so when we call open it appears
1352 * we are coming from the probed state.
1354 adapter->state = VNIC_PROBED;
1356 rc = ibmvnic_init(adapter);
1360 /* If the adapter was in PROBE state prior to the reset,
1363 if (reset_state == VNIC_PROBED)
1366 rc = ibmvnic_login(netdev);
1368 adapter->state = VNIC_PROBED;
1372 rc = reset_tx_pools(adapter);
1376 rc = reset_rx_pools(adapter);
1380 if (reset_state == VNIC_CLOSED)
1384 rc = __ibmvnic_open(netdev);
1386 if (list_empty(&adapter->rwi_list))
1387 adapter->state = VNIC_CLOSED;
1389 adapter->state = reset_state;
1394 netif_carrier_on(netdev);
1397 for (i = 0; i < adapter->req_rx_queues; i++)
1398 napi_schedule(&adapter->napi[i]);
1400 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1401 netdev_notify_peers(netdev);
1406 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1408 struct ibmvnic_rwi *rwi;
1410 mutex_lock(&adapter->rwi_lock);
1412 if (!list_empty(&adapter->rwi_list)) {
1413 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1415 list_del(&rwi->list);
1420 mutex_unlock(&adapter->rwi_lock);
1424 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1426 struct ibmvnic_rwi *rwi;
1428 rwi = get_next_rwi(adapter);
1431 rwi = get_next_rwi(adapter);
1435 static void __ibmvnic_reset(struct work_struct *work)
1437 struct ibmvnic_rwi *rwi;
1438 struct ibmvnic_adapter *adapter;
1439 struct net_device *netdev;
1443 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1444 netdev = adapter->netdev;
1446 mutex_lock(&adapter->reset_lock);
1447 adapter->resetting = true;
1448 reset_state = adapter->state;
1450 rwi = get_next_rwi(adapter);
1452 rc = do_reset(adapter, rwi, reset_state);
1457 rwi = get_next_rwi(adapter);
1461 free_all_rwi(adapter);
1462 mutex_unlock(&adapter->reset_lock);
1466 adapter->resetting = false;
1467 mutex_unlock(&adapter->reset_lock);
1470 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1471 enum ibmvnic_reset_reason reason)
1473 struct ibmvnic_rwi *rwi, *tmp;
1474 struct net_device *netdev = adapter->netdev;
1475 struct list_head *entry;
1477 if (adapter->state == VNIC_REMOVING ||
1478 adapter->state == VNIC_REMOVED) {
1479 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1483 if (adapter->state == VNIC_PROBING) {
1484 netdev_warn(netdev, "Adapter reset during probe\n");
1485 adapter->init_done_rc = EAGAIN;
1489 mutex_lock(&adapter->rwi_lock);
1491 list_for_each(entry, &adapter->rwi_list) {
1492 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1493 if (tmp->reset_reason == reason) {
1494 netdev_err(netdev, "Matching reset found, skipping\n");
1495 mutex_unlock(&adapter->rwi_lock);
1500 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1502 mutex_unlock(&adapter->rwi_lock);
1503 ibmvnic_close(netdev);
1507 rwi->reset_reason = reason;
1508 list_add_tail(&rwi->list, &adapter->rwi_list);
1509 mutex_unlock(&adapter->rwi_lock);
1510 schedule_work(&adapter->ibmvnic_reset);
1513 static void ibmvnic_tx_timeout(struct net_device *dev)
1515 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1517 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1520 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1521 struct ibmvnic_rx_buff *rx_buff)
1523 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1525 rx_buff->skb = NULL;
1527 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1528 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1530 atomic_dec(&pool->available);
1533 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1535 struct net_device *netdev = napi->dev;
1536 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1537 int scrq_num = (int)(napi - adapter->napi);
1538 int frames_processed = 0;
1541 while (frames_processed < budget) {
1542 struct sk_buff *skb;
1543 struct ibmvnic_rx_buff *rx_buff;
1544 union sub_crq *next;
1549 if (unlikely(adapter->resetting)) {
1550 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1551 napi_complete_done(napi, frames_processed);
1552 return frames_processed;
1555 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1557 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1559 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1560 rx_comp.correlator);
1561 /* do error checking */
1562 if (next->rx_comp.rc) {
1563 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1564 /* free the entry */
1565 next->rx_comp.first = 0;
1566 remove_buff_from_pool(adapter, rx_buff);
1570 length = be32_to_cpu(next->rx_comp.len);
1571 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1572 flags = next->rx_comp.flags;
1574 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1577 /* VLAN Header has been stripped by the system firmware and
1578 * needs to be inserted by the driver
1580 if (adapter->rx_vlan_header_insertion &&
1581 (flags & IBMVNIC_VLAN_STRIPPED))
1582 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1583 ntohs(next->rx_comp.vlan_tci));
1585 /* free the entry */
1586 next->rx_comp.first = 0;
1587 remove_buff_from_pool(adapter, rx_buff);
1589 skb_put(skb, length);
1590 skb->protocol = eth_type_trans(skb, netdev);
1591 skb_record_rx_queue(skb, scrq_num);
1593 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1594 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1595 skb->ip_summed = CHECKSUM_UNNECESSARY;
1599 napi_gro_receive(napi, skb); /* send it up */
1600 netdev->stats.rx_packets++;
1601 netdev->stats.rx_bytes += length;
1605 if (adapter->state != VNIC_CLOSING)
1606 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1608 if (frames_processed < budget) {
1609 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1610 napi_complete_done(napi, frames_processed);
1611 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1612 napi_reschedule(napi)) {
1613 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1617 return frames_processed;
1620 #ifdef CONFIG_NET_POLL_CONTROLLER
1621 static void ibmvnic_netpoll_controller(struct net_device *dev)
1623 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1626 replenish_pools(netdev_priv(dev));
1627 for (i = 0; i < adapter->req_rx_queues; i++)
1628 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1629 adapter->rx_scrq[i]);
1633 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1638 static const struct net_device_ops ibmvnic_netdev_ops = {
1639 .ndo_open = ibmvnic_open,
1640 .ndo_stop = ibmvnic_close,
1641 .ndo_start_xmit = ibmvnic_xmit,
1642 .ndo_set_rx_mode = ibmvnic_set_multi,
1643 .ndo_set_mac_address = ibmvnic_set_mac,
1644 .ndo_validate_addr = eth_validate_addr,
1645 .ndo_tx_timeout = ibmvnic_tx_timeout,
1646 #ifdef CONFIG_NET_POLL_CONTROLLER
1647 .ndo_poll_controller = ibmvnic_netpoll_controller,
1649 .ndo_change_mtu = ibmvnic_change_mtu,
1652 /* ethtool functions */
1654 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1655 struct ethtool_link_ksettings *cmd)
1657 u32 supported, advertising;
1659 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1661 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1663 cmd->base.speed = SPEED_1000;
1664 cmd->base.duplex = DUPLEX_FULL;
1665 cmd->base.port = PORT_FIBRE;
1666 cmd->base.phy_address = 0;
1667 cmd->base.autoneg = AUTONEG_ENABLE;
1669 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1671 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1677 static void ibmvnic_get_drvinfo(struct net_device *dev,
1678 struct ethtool_drvinfo *info)
1680 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1681 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1684 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1686 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1688 return adapter->msg_enable;
1691 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1693 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1695 adapter->msg_enable = data;
1698 static u32 ibmvnic_get_link(struct net_device *netdev)
1700 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1702 /* Don't need to send a query because we request a logical link up at
1703 * init and then we wait for link state indications
1705 return adapter->logical_link_state;
1708 static void ibmvnic_get_ringparam(struct net_device *netdev,
1709 struct ethtool_ringparam *ring)
1711 ring->rx_max_pending = 0;
1712 ring->tx_max_pending = 0;
1713 ring->rx_mini_max_pending = 0;
1714 ring->rx_jumbo_max_pending = 0;
1715 ring->rx_pending = 0;
1716 ring->tx_pending = 0;
1717 ring->rx_mini_pending = 0;
1718 ring->rx_jumbo_pending = 0;
1721 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1725 if (stringset != ETH_SS_STATS)
1728 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1729 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1732 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1736 return ARRAY_SIZE(ibmvnic_stats);
1742 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1743 struct ethtool_stats *stats, u64 *data)
1745 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1746 union ibmvnic_crq crq;
1749 memset(&crq, 0, sizeof(crq));
1750 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1751 crq.request_statistics.cmd = REQUEST_STATISTICS;
1752 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1753 crq.request_statistics.len =
1754 cpu_to_be32(sizeof(struct ibmvnic_statistics));
1756 /* Wait for data to be written */
1757 init_completion(&adapter->stats_done);
1758 ibmvnic_send_crq(adapter, &crq);
1759 wait_for_completion(&adapter->stats_done);
1761 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1762 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1765 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1766 .get_drvinfo = ibmvnic_get_drvinfo,
1767 .get_msglevel = ibmvnic_get_msglevel,
1768 .set_msglevel = ibmvnic_set_msglevel,
1769 .get_link = ibmvnic_get_link,
1770 .get_ringparam = ibmvnic_get_ringparam,
1771 .get_strings = ibmvnic_get_strings,
1772 .get_sset_count = ibmvnic_get_sset_count,
1773 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
1774 .get_link_ksettings = ibmvnic_get_link_ksettings,
1777 /* Routines for managing CRQs/sCRQs */
1779 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
1780 struct ibmvnic_sub_crq_queue *scrq)
1785 free_irq(scrq->irq, scrq);
1786 irq_dispose_mapping(scrq->irq);
1790 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1793 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1794 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1798 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
1802 for (i = 0; i < adapter->req_tx_queues; i++) {
1803 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1808 for (i = 0; i < adapter->req_rx_queues; i++) {
1809 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1817 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1818 struct ibmvnic_sub_crq_queue *scrq)
1820 struct device *dev = &adapter->vdev->dev;
1823 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1825 /* Close the sub-crqs */
1827 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1828 adapter->vdev->unit_address,
1830 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1833 netdev_err(adapter->netdev,
1834 "Failed to release sub-CRQ %16lx, rc = %ld\n",
1838 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1840 free_pages((unsigned long)scrq->msgs, 2);
1844 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1847 struct device *dev = &adapter->vdev->dev;
1848 struct ibmvnic_sub_crq_queue *scrq;
1851 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
1856 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
1858 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1859 goto zero_page_failed;
1862 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1864 if (dma_mapping_error(dev, scrq->msg_token)) {
1865 dev_warn(dev, "Couldn't map crq queue messages page\n");
1869 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1870 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1872 if (rc == H_RESOURCE)
1873 rc = ibmvnic_reset_crq(adapter);
1875 if (rc == H_CLOSED) {
1876 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1878 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1882 scrq->adapter = adapter;
1883 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1884 spin_lock_init(&scrq->lock);
1886 netdev_dbg(adapter->netdev,
1887 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1888 scrq->crq_num, scrq->hw_irq, scrq->irq);
1893 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1896 free_pages((unsigned long)scrq->msgs, 2);
1903 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1907 if (adapter->tx_scrq) {
1908 for (i = 0; i < adapter->req_tx_queues; i++) {
1909 if (!adapter->tx_scrq[i])
1912 if (adapter->tx_scrq[i]->irq) {
1913 free_irq(adapter->tx_scrq[i]->irq,
1914 adapter->tx_scrq[i]);
1915 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1916 adapter->tx_scrq[i]->irq = 0;
1919 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1922 kfree(adapter->tx_scrq);
1923 adapter->tx_scrq = NULL;
1926 if (adapter->rx_scrq) {
1927 for (i = 0; i < adapter->req_rx_queues; i++) {
1928 if (!adapter->rx_scrq[i])
1931 if (adapter->rx_scrq[i]->irq) {
1932 free_irq(adapter->rx_scrq[i]->irq,
1933 adapter->rx_scrq[i]);
1934 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1935 adapter->rx_scrq[i]->irq = 0;
1938 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1941 kfree(adapter->rx_scrq);
1942 adapter->rx_scrq = NULL;
1946 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1947 struct ibmvnic_sub_crq_queue *scrq)
1949 struct device *dev = &adapter->vdev->dev;
1952 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1953 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1955 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1960 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1961 struct ibmvnic_sub_crq_queue *scrq)
1963 struct device *dev = &adapter->vdev->dev;
1966 if (scrq->hw_irq > 0x100000000ULL) {
1967 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1971 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1972 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1974 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1979 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1980 struct ibmvnic_sub_crq_queue *scrq)
1982 struct device *dev = &adapter->vdev->dev;
1983 struct ibmvnic_tx_buff *txbuff;
1984 union sub_crq *next;
1990 while (pending_scrq(adapter, scrq)) {
1991 unsigned int pool = scrq->pool_index;
1993 next = ibmvnic_next_scrq(adapter, scrq);
1994 for (i = 0; i < next->tx_comp.num_comps; i++) {
1995 if (next->tx_comp.rcs[i]) {
1996 dev_err(dev, "tx error %x\n",
1997 next->tx_comp.rcs[i]);
2000 index = be32_to_cpu(next->tx_comp.correlators[i]);
2001 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2003 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2004 if (!txbuff->data_dma[j])
2007 txbuff->data_dma[j] = 0;
2009 /* if sub_crq was sent indirectly */
2010 first = txbuff->indir_arr[0].generic.first;
2011 if (first == IBMVNIC_CRQ_CMD) {
2012 dma_unmap_single(dev, txbuff->indir_dma,
2013 sizeof(txbuff->indir_arr),
2017 if (txbuff->last_frag) {
2018 dev_kfree_skb_any(txbuff->skb);
2022 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2023 producer_index] = index;
2024 adapter->tx_pool[pool].producer_index =
2025 (adapter->tx_pool[pool].producer_index + 1) %
2026 adapter->req_tx_entries_per_subcrq;
2028 /* remove tx_comp scrq*/
2029 next->tx_comp.first = 0;
2031 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2032 (adapter->req_tx_entries_per_subcrq / 2) &&
2033 __netif_subqueue_stopped(adapter->netdev,
2034 scrq->pool_index)) {
2035 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2036 netdev_info(adapter->netdev, "Started queue %d\n",
2041 enable_scrq_irq(adapter, scrq);
2043 if (pending_scrq(adapter, scrq)) {
2044 disable_scrq_irq(adapter, scrq);
2051 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2053 struct ibmvnic_sub_crq_queue *scrq = instance;
2054 struct ibmvnic_adapter *adapter = scrq->adapter;
2056 disable_scrq_irq(adapter, scrq);
2057 ibmvnic_complete_tx(adapter, scrq);
2062 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2064 struct ibmvnic_sub_crq_queue *scrq = instance;
2065 struct ibmvnic_adapter *adapter = scrq->adapter;
2067 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2068 disable_scrq_irq(adapter, scrq);
2069 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2075 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2077 struct device *dev = &adapter->vdev->dev;
2078 struct ibmvnic_sub_crq_queue *scrq;
2082 for (i = 0; i < adapter->req_tx_queues; i++) {
2083 scrq = adapter->tx_scrq[i];
2084 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2088 dev_err(dev, "Error mapping irq\n");
2089 goto req_tx_irq_failed;
2092 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2093 0, "ibmvnic_tx", scrq);
2096 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2098 irq_dispose_mapping(scrq->irq);
2099 goto req_rx_irq_failed;
2103 for (i = 0; i < adapter->req_rx_queues; i++) {
2104 scrq = adapter->rx_scrq[i];
2105 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2108 dev_err(dev, "Error mapping irq\n");
2109 goto req_rx_irq_failed;
2111 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2112 0, "ibmvnic_rx", scrq);
2114 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2116 irq_dispose_mapping(scrq->irq);
2117 goto req_rx_irq_failed;
2123 for (j = 0; j < i; j++) {
2124 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2125 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2127 i = adapter->req_tx_queues;
2129 for (j = 0; j < i; j++) {
2130 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2131 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2133 release_sub_crqs(adapter);
2137 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2139 struct device *dev = &adapter->vdev->dev;
2140 struct ibmvnic_sub_crq_queue **allqueues;
2141 int registered_queues = 0;
2146 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2148 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2152 for (i = 0; i < total_queues; i++) {
2153 allqueues[i] = init_sub_crq_queue(adapter);
2154 if (!allqueues[i]) {
2155 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2158 registered_queues++;
2161 /* Make sure we were able to register the minimum number of queues */
2162 if (registered_queues <
2163 adapter->min_tx_queues + adapter->min_rx_queues) {
2164 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2168 /* Distribute the failed allocated queues*/
2169 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2170 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2173 if (adapter->req_rx_queues > adapter->min_rx_queues)
2174 adapter->req_rx_queues--;
2179 if (adapter->req_tx_queues > adapter->min_tx_queues)
2180 adapter->req_tx_queues--;
2187 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2188 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2189 if (!adapter->tx_scrq)
2192 for (i = 0; i < adapter->req_tx_queues; i++) {
2193 adapter->tx_scrq[i] = allqueues[i];
2194 adapter->tx_scrq[i]->pool_index = i;
2197 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2198 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2199 if (!adapter->rx_scrq)
2202 for (i = 0; i < adapter->req_rx_queues; i++) {
2203 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2204 adapter->rx_scrq[i]->scrq_num = i;
2211 kfree(adapter->tx_scrq);
2212 adapter->tx_scrq = NULL;
2214 for (i = 0; i < registered_queues; i++)
2215 release_sub_crq_queue(adapter, allqueues[i]);
2220 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2222 struct device *dev = &adapter->vdev->dev;
2223 union ibmvnic_crq crq;
2226 /* Sub-CRQ entries are 32 byte long */
2227 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2229 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2230 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2231 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2235 /* Get the minimum between the queried max and the entries
2236 * that fit in our PAGE_SIZE
2238 adapter->req_tx_entries_per_subcrq =
2239 adapter->max_tx_entries_per_subcrq > entries_page ?
2240 entries_page : adapter->max_tx_entries_per_subcrq;
2241 adapter->req_rx_add_entries_per_subcrq =
2242 adapter->max_rx_add_entries_per_subcrq > entries_page ?
2243 entries_page : adapter->max_rx_add_entries_per_subcrq;
2245 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2246 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2247 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2249 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2252 memset(&crq, 0, sizeof(crq));
2253 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2254 crq.request_capability.cmd = REQUEST_CAPABILITY;
2256 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2257 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2258 atomic_inc(&adapter->running_cap_crqs);
2259 ibmvnic_send_crq(adapter, &crq);
2261 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2262 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2263 atomic_inc(&adapter->running_cap_crqs);
2264 ibmvnic_send_crq(adapter, &crq);
2266 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2267 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2268 atomic_inc(&adapter->running_cap_crqs);
2269 ibmvnic_send_crq(adapter, &crq);
2271 crq.request_capability.capability =
2272 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2273 crq.request_capability.number =
2274 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2275 atomic_inc(&adapter->running_cap_crqs);
2276 ibmvnic_send_crq(adapter, &crq);
2278 crq.request_capability.capability =
2279 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2280 crq.request_capability.number =
2281 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2282 atomic_inc(&adapter->running_cap_crqs);
2283 ibmvnic_send_crq(adapter, &crq);
2285 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2286 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2287 atomic_inc(&adapter->running_cap_crqs);
2288 ibmvnic_send_crq(adapter, &crq);
2290 if (adapter->netdev->flags & IFF_PROMISC) {
2291 if (adapter->promisc_supported) {
2292 crq.request_capability.capability =
2293 cpu_to_be16(PROMISC_REQUESTED);
2294 crq.request_capability.number = cpu_to_be64(1);
2295 atomic_inc(&adapter->running_cap_crqs);
2296 ibmvnic_send_crq(adapter, &crq);
2299 crq.request_capability.capability =
2300 cpu_to_be16(PROMISC_REQUESTED);
2301 crq.request_capability.number = cpu_to_be64(0);
2302 atomic_inc(&adapter->running_cap_crqs);
2303 ibmvnic_send_crq(adapter, &crq);
2307 static int pending_scrq(struct ibmvnic_adapter *adapter,
2308 struct ibmvnic_sub_crq_queue *scrq)
2310 union sub_crq *entry = &scrq->msgs[scrq->cur];
2312 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2318 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2319 struct ibmvnic_sub_crq_queue *scrq)
2321 union sub_crq *entry;
2322 unsigned long flags;
2324 spin_lock_irqsave(&scrq->lock, flags);
2325 entry = &scrq->msgs[scrq->cur];
2326 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2327 if (++scrq->cur == scrq->size)
2332 spin_unlock_irqrestore(&scrq->lock, flags);
2337 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2339 struct ibmvnic_crq_queue *queue = &adapter->crq;
2340 union ibmvnic_crq *crq;
2342 crq = &queue->msgs[queue->cur];
2343 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2344 if (++queue->cur == queue->size)
2353 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2354 union sub_crq *sub_crq)
2356 unsigned int ua = adapter->vdev->unit_address;
2357 struct device *dev = &adapter->vdev->dev;
2358 u64 *u64_crq = (u64 *)sub_crq;
2361 netdev_dbg(adapter->netdev,
2362 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2363 (unsigned long int)cpu_to_be64(remote_handle),
2364 (unsigned long int)cpu_to_be64(u64_crq[0]),
2365 (unsigned long int)cpu_to_be64(u64_crq[1]),
2366 (unsigned long int)cpu_to_be64(u64_crq[2]),
2367 (unsigned long int)cpu_to_be64(u64_crq[3]));
2369 /* Make sure the hypervisor sees the complete request */
2372 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2373 cpu_to_be64(remote_handle),
2374 cpu_to_be64(u64_crq[0]),
2375 cpu_to_be64(u64_crq[1]),
2376 cpu_to_be64(u64_crq[2]),
2377 cpu_to_be64(u64_crq[3]));
2381 dev_warn(dev, "CRQ Queue closed\n");
2382 dev_err(dev, "Send error (rc=%d)\n", rc);
2388 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2389 u64 remote_handle, u64 ioba, u64 num_entries)
2391 unsigned int ua = adapter->vdev->unit_address;
2392 struct device *dev = &adapter->vdev->dev;
2395 /* Make sure the hypervisor sees the complete request */
2397 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2398 cpu_to_be64(remote_handle),
2403 dev_warn(dev, "CRQ Queue closed\n");
2404 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2410 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2411 union ibmvnic_crq *crq)
2413 unsigned int ua = adapter->vdev->unit_address;
2414 struct device *dev = &adapter->vdev->dev;
2415 u64 *u64_crq = (u64 *)crq;
2418 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2419 (unsigned long int)cpu_to_be64(u64_crq[0]),
2420 (unsigned long int)cpu_to_be64(u64_crq[1]));
2422 /* Make sure the hypervisor sees the complete request */
2425 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2426 cpu_to_be64(u64_crq[0]),
2427 cpu_to_be64(u64_crq[1]));
2431 dev_warn(dev, "CRQ Queue closed\n");
2432 dev_warn(dev, "Send error (rc=%d)\n", rc);
2438 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2440 union ibmvnic_crq crq;
2442 memset(&crq, 0, sizeof(crq));
2443 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2444 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2445 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2447 return ibmvnic_send_crq(adapter, &crq);
2450 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2452 union ibmvnic_crq crq;
2454 memset(&crq, 0, sizeof(crq));
2455 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2456 crq.version_exchange.cmd = VERSION_EXCHANGE;
2457 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2459 return ibmvnic_send_crq(adapter, &crq);
2462 static void send_login(struct ibmvnic_adapter *adapter)
2464 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2465 struct ibmvnic_login_buffer *login_buffer;
2466 struct device *dev = &adapter->vdev->dev;
2467 dma_addr_t rsp_buffer_token;
2468 dma_addr_t buffer_token;
2469 size_t rsp_buffer_size;
2470 union ibmvnic_crq crq;
2477 sizeof(struct ibmvnic_login_buffer) +
2478 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2480 login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2482 goto buf_alloc_failed;
2484 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2486 if (dma_mapping_error(dev, buffer_token)) {
2487 dev_err(dev, "Couldn't map login buffer\n");
2488 goto buf_map_failed;
2491 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2492 sizeof(u64) * adapter->req_tx_queues +
2493 sizeof(u64) * adapter->req_rx_queues +
2494 sizeof(u64) * adapter->req_rx_queues +
2495 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2497 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2498 if (!login_rsp_buffer)
2499 goto buf_rsp_alloc_failed;
2501 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2502 rsp_buffer_size, DMA_FROM_DEVICE);
2503 if (dma_mapping_error(dev, rsp_buffer_token)) {
2504 dev_err(dev, "Couldn't map login rsp buffer\n");
2505 goto buf_rsp_map_failed;
2508 adapter->login_buf = login_buffer;
2509 adapter->login_buf_token = buffer_token;
2510 adapter->login_buf_sz = buffer_size;
2511 adapter->login_rsp_buf = login_rsp_buffer;
2512 adapter->login_rsp_buf_token = rsp_buffer_token;
2513 adapter->login_rsp_buf_sz = rsp_buffer_size;
2515 login_buffer->len = cpu_to_be32(buffer_size);
2516 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2517 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2518 login_buffer->off_txcomp_subcrqs =
2519 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2520 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2521 login_buffer->off_rxcomp_subcrqs =
2522 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2523 sizeof(u64) * adapter->req_tx_queues);
2524 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2525 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2527 tx_list_p = (__be64 *)((char *)login_buffer +
2528 sizeof(struct ibmvnic_login_buffer));
2529 rx_list_p = (__be64 *)((char *)login_buffer +
2530 sizeof(struct ibmvnic_login_buffer) +
2531 sizeof(u64) * adapter->req_tx_queues);
2533 for (i = 0; i < adapter->req_tx_queues; i++) {
2534 if (adapter->tx_scrq[i]) {
2535 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2540 for (i = 0; i < adapter->req_rx_queues; i++) {
2541 if (adapter->rx_scrq[i]) {
2542 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2547 netdev_dbg(adapter->netdev, "Login Buffer:\n");
2548 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2549 netdev_dbg(adapter->netdev, "%016lx\n",
2550 ((unsigned long int *)(adapter->login_buf))[i]);
2553 memset(&crq, 0, sizeof(crq));
2554 crq.login.first = IBMVNIC_CRQ_CMD;
2555 crq.login.cmd = LOGIN;
2556 crq.login.ioba = cpu_to_be32(buffer_token);
2557 crq.login.len = cpu_to_be32(buffer_size);
2558 ibmvnic_send_crq(adapter, &crq);
2563 kfree(login_rsp_buffer);
2564 buf_rsp_alloc_failed:
2565 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2567 kfree(login_buffer);
2572 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2575 union ibmvnic_crq crq;
2577 memset(&crq, 0, sizeof(crq));
2578 crq.request_map.first = IBMVNIC_CRQ_CMD;
2579 crq.request_map.cmd = REQUEST_MAP;
2580 crq.request_map.map_id = map_id;
2581 crq.request_map.ioba = cpu_to_be32(addr);
2582 crq.request_map.len = cpu_to_be32(len);
2583 ibmvnic_send_crq(adapter, &crq);
2586 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2588 union ibmvnic_crq crq;
2590 memset(&crq, 0, sizeof(crq));
2591 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2592 crq.request_unmap.cmd = REQUEST_UNMAP;
2593 crq.request_unmap.map_id = map_id;
2594 ibmvnic_send_crq(adapter, &crq);
2597 static void send_map_query(struct ibmvnic_adapter *adapter)
2599 union ibmvnic_crq crq;
2601 memset(&crq, 0, sizeof(crq));
2602 crq.query_map.first = IBMVNIC_CRQ_CMD;
2603 crq.query_map.cmd = QUERY_MAP;
2604 ibmvnic_send_crq(adapter, &crq);
2607 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2608 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2610 union ibmvnic_crq crq;
2612 atomic_set(&adapter->running_cap_crqs, 0);
2613 memset(&crq, 0, sizeof(crq));
2614 crq.query_capability.first = IBMVNIC_CRQ_CMD;
2615 crq.query_capability.cmd = QUERY_CAPABILITY;
2617 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2618 atomic_inc(&adapter->running_cap_crqs);
2619 ibmvnic_send_crq(adapter, &crq);
2621 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2622 atomic_inc(&adapter->running_cap_crqs);
2623 ibmvnic_send_crq(adapter, &crq);
2625 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2626 atomic_inc(&adapter->running_cap_crqs);
2627 ibmvnic_send_crq(adapter, &crq);
2629 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2630 atomic_inc(&adapter->running_cap_crqs);
2631 ibmvnic_send_crq(adapter, &crq);
2633 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2634 atomic_inc(&adapter->running_cap_crqs);
2635 ibmvnic_send_crq(adapter, &crq);
2637 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2638 atomic_inc(&adapter->running_cap_crqs);
2639 ibmvnic_send_crq(adapter, &crq);
2641 crq.query_capability.capability =
2642 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2643 atomic_inc(&adapter->running_cap_crqs);
2644 ibmvnic_send_crq(adapter, &crq);
2646 crq.query_capability.capability =
2647 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2648 atomic_inc(&adapter->running_cap_crqs);
2649 ibmvnic_send_crq(adapter, &crq);
2651 crq.query_capability.capability =
2652 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2653 atomic_inc(&adapter->running_cap_crqs);
2654 ibmvnic_send_crq(adapter, &crq);
2656 crq.query_capability.capability =
2657 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2658 atomic_inc(&adapter->running_cap_crqs);
2659 ibmvnic_send_crq(adapter, &crq);
2661 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2662 atomic_inc(&adapter->running_cap_crqs);
2663 ibmvnic_send_crq(adapter, &crq);
2665 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2666 atomic_inc(&adapter->running_cap_crqs);
2667 ibmvnic_send_crq(adapter, &crq);
2669 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2670 atomic_inc(&adapter->running_cap_crqs);
2671 ibmvnic_send_crq(adapter, &crq);
2673 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2674 atomic_inc(&adapter->running_cap_crqs);
2675 ibmvnic_send_crq(adapter, &crq);
2677 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2678 atomic_inc(&adapter->running_cap_crqs);
2679 ibmvnic_send_crq(adapter, &crq);
2681 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2682 atomic_inc(&adapter->running_cap_crqs);
2683 ibmvnic_send_crq(adapter, &crq);
2685 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2686 atomic_inc(&adapter->running_cap_crqs);
2687 ibmvnic_send_crq(adapter, &crq);
2689 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2690 atomic_inc(&adapter->running_cap_crqs);
2691 ibmvnic_send_crq(adapter, &crq);
2693 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2694 atomic_inc(&adapter->running_cap_crqs);
2695 ibmvnic_send_crq(adapter, &crq);
2697 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2698 atomic_inc(&adapter->running_cap_crqs);
2699 ibmvnic_send_crq(adapter, &crq);
2701 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2702 atomic_inc(&adapter->running_cap_crqs);
2703 ibmvnic_send_crq(adapter, &crq);
2705 crq.query_capability.capability =
2706 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2707 atomic_inc(&adapter->running_cap_crqs);
2708 ibmvnic_send_crq(adapter, &crq);
2710 crq.query_capability.capability =
2711 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2712 atomic_inc(&adapter->running_cap_crqs);
2713 ibmvnic_send_crq(adapter, &crq);
2715 crq.query_capability.capability =
2716 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2717 atomic_inc(&adapter->running_cap_crqs);
2718 ibmvnic_send_crq(adapter, &crq);
2720 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2721 atomic_inc(&adapter->running_cap_crqs);
2722 ibmvnic_send_crq(adapter, &crq);
2725 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2727 struct device *dev = &adapter->vdev->dev;
2728 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2729 union ibmvnic_crq crq;
2732 dma_unmap_single(dev, adapter->ip_offload_tok,
2733 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2735 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2736 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2737 netdev_dbg(adapter->netdev, "%016lx\n",
2738 ((unsigned long int *)(buf))[i]);
2740 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2741 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2742 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2743 buf->tcp_ipv4_chksum);
2744 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2745 buf->tcp_ipv6_chksum);
2746 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2747 buf->udp_ipv4_chksum);
2748 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2749 buf->udp_ipv6_chksum);
2750 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2751 buf->large_tx_ipv4);
2752 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2753 buf->large_tx_ipv6);
2754 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2755 buf->large_rx_ipv4);
2756 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2757 buf->large_rx_ipv6);
2758 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2759 buf->max_ipv4_header_size);
2760 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2761 buf->max_ipv6_header_size);
2762 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2763 buf->max_tcp_header_size);
2764 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2765 buf->max_udp_header_size);
2766 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2767 buf->max_large_tx_size);
2768 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2769 buf->max_large_rx_size);
2770 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2771 buf->ipv6_extension_header);
2772 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2773 buf->tcp_pseudosum_req);
2774 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2775 buf->num_ipv6_ext_headers);
2776 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2777 buf->off_ipv6_ext_headers);
2779 adapter->ip_offload_ctrl_tok =
2780 dma_map_single(dev, &adapter->ip_offload_ctrl,
2781 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2783 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2784 dev_err(dev, "Couldn't map ip offload control buffer\n");
2788 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2789 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2790 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2791 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2792 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2794 /* large_tx/rx disabled for now, additional features needed */
2795 adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2796 adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2797 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2798 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2800 adapter->netdev->features = NETIF_F_GSO;
2802 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2803 adapter->netdev->features |= NETIF_F_IP_CSUM;
2805 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2806 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2808 if ((adapter->netdev->features &
2809 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2810 adapter->netdev->features |= NETIF_F_RXCSUM;
2812 memset(&crq, 0, sizeof(crq));
2813 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2814 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2815 crq.control_ip_offload.len =
2816 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2817 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2818 ibmvnic_send_crq(adapter, &crq);
2821 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2822 struct ibmvnic_adapter *adapter)
2824 struct device *dev = &adapter->vdev->dev;
2825 struct ibmvnic_error_buff *error_buff, *tmp;
2826 unsigned long flags;
2830 if (!crq->request_error_rsp.rc.code) {
2831 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2832 crq->request_error_rsp.rc.code);
2836 spin_lock_irqsave(&adapter->error_list_lock, flags);
2837 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2838 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2840 list_del(&error_buff->list);
2843 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2846 dev_err(dev, "Couldn't find error id %x\n",
2847 be32_to_cpu(crq->request_error_rsp.error_id));
2851 dev_err(dev, "Detailed info for error id %x:",
2852 be32_to_cpu(crq->request_error_rsp.error_id));
2854 for (i = 0; i < error_buff->len; i++) {
2855 pr_cont("%02x", (int)error_buff->buff[i]);
2861 dma_unmap_single(dev, error_buff->dma, error_buff->len,
2863 kfree(error_buff->buff);
2867 static void request_error_information(struct ibmvnic_adapter *adapter,
2868 union ibmvnic_crq *err_crq)
2870 struct device *dev = &adapter->vdev->dev;
2871 struct net_device *netdev = adapter->netdev;
2872 struct ibmvnic_error_buff *error_buff;
2873 unsigned long timeout = msecs_to_jiffies(30000);
2874 union ibmvnic_crq crq;
2875 unsigned long flags;
2878 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2882 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
2883 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2884 if (!error_buff->buff) {
2889 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2891 if (dma_mapping_error(dev, error_buff->dma)) {
2892 netdev_err(netdev, "Couldn't map error buffer\n");
2893 kfree(error_buff->buff);
2898 error_buff->len = detail_len;
2899 error_buff->error_id = err_crq->error_indication.error_id;
2901 spin_lock_irqsave(&adapter->error_list_lock, flags);
2902 list_add_tail(&error_buff->list, &adapter->errors);
2903 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2905 memset(&crq, 0, sizeof(crq));
2906 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2907 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2908 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2909 crq.request_error_info.len = cpu_to_be32(detail_len);
2910 crq.request_error_info.error_id = err_crq->error_indication.error_id;
2912 rc = ibmvnic_send_crq(adapter, &crq);
2914 netdev_err(netdev, "failed to request error information\n");
2918 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2919 netdev_err(netdev, "timeout waiting for error information\n");
2926 spin_lock_irqsave(&adapter->error_list_lock, flags);
2927 list_del(&error_buff->list);
2928 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2930 kfree(error_buff->buff);
2934 static void handle_error_indication(union ibmvnic_crq *crq,
2935 struct ibmvnic_adapter *adapter)
2937 struct device *dev = &adapter->vdev->dev;
2939 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2940 crq->error_indication.flags
2941 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2942 be32_to_cpu(crq->error_indication.error_id),
2943 be16_to_cpu(crq->error_indication.error_cause));
2945 if (be32_to_cpu(crq->error_indication.error_id))
2946 request_error_information(adapter, crq);
2948 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2949 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2951 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
2954 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2955 struct ibmvnic_adapter *adapter)
2957 struct net_device *netdev = adapter->netdev;
2958 struct device *dev = &adapter->vdev->dev;
2961 rc = crq->change_mac_addr_rsp.rc.code;
2963 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2966 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2970 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2971 struct ibmvnic_adapter *adapter)
2973 struct device *dev = &adapter->vdev->dev;
2977 atomic_dec(&adapter->running_cap_crqs);
2978 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2980 req_value = &adapter->req_tx_queues;
2984 req_value = &adapter->req_rx_queues;
2987 case REQ_RX_ADD_QUEUES:
2988 req_value = &adapter->req_rx_add_queues;
2991 case REQ_TX_ENTRIES_PER_SUBCRQ:
2992 req_value = &adapter->req_tx_entries_per_subcrq;
2993 name = "tx_entries_per_subcrq";
2995 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2996 req_value = &adapter->req_rx_add_entries_per_subcrq;
2997 name = "rx_add_entries_per_subcrq";
3000 req_value = &adapter->req_mtu;
3003 case PROMISC_REQUESTED:
3004 req_value = &adapter->promisc;
3008 dev_err(dev, "Got invalid cap request rsp %d\n",
3009 crq->request_capability.capability);
3013 switch (crq->request_capability_rsp.rc.code) {
3016 case PARTIALSUCCESS:
3017 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3019 (long int)be64_to_cpu(crq->request_capability_rsp.
3021 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
3022 ibmvnic_send_req_caps(adapter, 1);
3025 dev_err(dev, "Error %d in request cap rsp\n",
3026 crq->request_capability_rsp.rc.code);
3030 /* Done receiving requested capabilities, query IP offload support */
3031 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3032 union ibmvnic_crq newcrq;
3033 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3034 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3035 &adapter->ip_offload_buf;
3037 adapter->wait_capability = false;
3038 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3042 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3043 if (!firmware_has_feature(FW_FEATURE_CMO))
3044 dev_err(dev, "Couldn't map offload buffer\n");
3048 memset(&newcrq, 0, sizeof(newcrq));
3049 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3050 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3051 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3052 newcrq.query_ip_offload.ioba =
3053 cpu_to_be32(adapter->ip_offload_tok);
3055 ibmvnic_send_crq(adapter, &newcrq);
3059 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3060 struct ibmvnic_adapter *adapter)
3062 struct device *dev = &adapter->vdev->dev;
3063 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3064 struct ibmvnic_login_buffer *login = adapter->login_buf;
3067 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3069 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3070 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3072 /* If the number of queues requested can't be allocated by the
3073 * server, the login response will return with code 1. We will need
3074 * to resend the login buffer with fewer queues requested.
3076 if (login_rsp_crq->generic.rc.code) {
3077 adapter->renegotiate = true;
3078 complete(&adapter->init_done);
3082 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3083 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3084 netdev_dbg(adapter->netdev, "%016lx\n",
3085 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3089 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3090 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3091 adapter->req_rx_add_queues !=
3092 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3093 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3094 ibmvnic_remove(adapter->vdev);
3097 complete(&adapter->init_done);
3102 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3103 struct ibmvnic_adapter *adapter)
3105 struct device *dev = &adapter->vdev->dev;
3108 rc = crq->request_unmap_rsp.rc.code;
3110 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3113 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3114 struct ibmvnic_adapter *adapter)
3116 struct net_device *netdev = adapter->netdev;
3117 struct device *dev = &adapter->vdev->dev;
3120 rc = crq->query_map_rsp.rc.code;
3122 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3125 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3126 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3127 crq->query_map_rsp.free_pages);
3130 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3131 struct ibmvnic_adapter *adapter)
3133 struct net_device *netdev = adapter->netdev;
3134 struct device *dev = &adapter->vdev->dev;
3137 atomic_dec(&adapter->running_cap_crqs);
3138 netdev_dbg(netdev, "Outstanding queries: %d\n",
3139 atomic_read(&adapter->running_cap_crqs));
3140 rc = crq->query_capability.rc.code;
3142 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3146 switch (be16_to_cpu(crq->query_capability.capability)) {
3148 adapter->min_tx_queues =
3149 be64_to_cpu(crq->query_capability.number);
3150 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3151 adapter->min_tx_queues);
3154 adapter->min_rx_queues =
3155 be64_to_cpu(crq->query_capability.number);
3156 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3157 adapter->min_rx_queues);
3159 case MIN_RX_ADD_QUEUES:
3160 adapter->min_rx_add_queues =
3161 be64_to_cpu(crq->query_capability.number);
3162 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3163 adapter->min_rx_add_queues);
3166 adapter->max_tx_queues =
3167 be64_to_cpu(crq->query_capability.number);
3168 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3169 adapter->max_tx_queues);
3172 adapter->max_rx_queues =
3173 be64_to_cpu(crq->query_capability.number);
3174 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3175 adapter->max_rx_queues);
3177 case MAX_RX_ADD_QUEUES:
3178 adapter->max_rx_add_queues =
3179 be64_to_cpu(crq->query_capability.number);
3180 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3181 adapter->max_rx_add_queues);
3183 case MIN_TX_ENTRIES_PER_SUBCRQ:
3184 adapter->min_tx_entries_per_subcrq =
3185 be64_to_cpu(crq->query_capability.number);
3186 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3187 adapter->min_tx_entries_per_subcrq);
3189 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3190 adapter->min_rx_add_entries_per_subcrq =
3191 be64_to_cpu(crq->query_capability.number);
3192 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3193 adapter->min_rx_add_entries_per_subcrq);
3195 case MAX_TX_ENTRIES_PER_SUBCRQ:
3196 adapter->max_tx_entries_per_subcrq =
3197 be64_to_cpu(crq->query_capability.number);
3198 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3199 adapter->max_tx_entries_per_subcrq);
3201 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3202 adapter->max_rx_add_entries_per_subcrq =
3203 be64_to_cpu(crq->query_capability.number);
3204 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3205 adapter->max_rx_add_entries_per_subcrq);
3207 case TCP_IP_OFFLOAD:
3208 adapter->tcp_ip_offload =
3209 be64_to_cpu(crq->query_capability.number);
3210 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3211 adapter->tcp_ip_offload);
3213 case PROMISC_SUPPORTED:
3214 adapter->promisc_supported =
3215 be64_to_cpu(crq->query_capability.number);
3216 netdev_dbg(netdev, "promisc_supported = %lld\n",
3217 adapter->promisc_supported);
3220 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3221 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3222 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3225 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3226 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3227 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3229 case MAX_MULTICAST_FILTERS:
3230 adapter->max_multicast_filters =
3231 be64_to_cpu(crq->query_capability.number);
3232 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3233 adapter->max_multicast_filters);
3235 case VLAN_HEADER_INSERTION:
3236 adapter->vlan_header_insertion =
3237 be64_to_cpu(crq->query_capability.number);
3238 if (adapter->vlan_header_insertion)
3239 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3240 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3241 adapter->vlan_header_insertion);
3243 case RX_VLAN_HEADER_INSERTION:
3244 adapter->rx_vlan_header_insertion =
3245 be64_to_cpu(crq->query_capability.number);
3246 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3247 adapter->rx_vlan_header_insertion);
3249 case MAX_TX_SG_ENTRIES:
3250 adapter->max_tx_sg_entries =
3251 be64_to_cpu(crq->query_capability.number);
3252 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3253 adapter->max_tx_sg_entries);
3255 case RX_SG_SUPPORTED:
3256 adapter->rx_sg_supported =
3257 be64_to_cpu(crq->query_capability.number);
3258 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3259 adapter->rx_sg_supported);
3261 case OPT_TX_COMP_SUB_QUEUES:
3262 adapter->opt_tx_comp_sub_queues =
3263 be64_to_cpu(crq->query_capability.number);
3264 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3265 adapter->opt_tx_comp_sub_queues);
3267 case OPT_RX_COMP_QUEUES:
3268 adapter->opt_rx_comp_queues =
3269 be64_to_cpu(crq->query_capability.number);
3270 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3271 adapter->opt_rx_comp_queues);
3273 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3274 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3275 be64_to_cpu(crq->query_capability.number);
3276 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3277 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3279 case OPT_TX_ENTRIES_PER_SUBCRQ:
3280 adapter->opt_tx_entries_per_subcrq =
3281 be64_to_cpu(crq->query_capability.number);
3282 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3283 adapter->opt_tx_entries_per_subcrq);
3285 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3286 adapter->opt_rxba_entries_per_subcrq =
3287 be64_to_cpu(crq->query_capability.number);
3288 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3289 adapter->opt_rxba_entries_per_subcrq);
3291 case TX_RX_DESC_REQ:
3292 adapter->tx_rx_desc_req = crq->query_capability.number;
3293 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3294 adapter->tx_rx_desc_req);
3298 netdev_err(netdev, "Got invalid cap rsp %d\n",
3299 crq->query_capability.capability);
3303 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3304 adapter->wait_capability = false;
3305 ibmvnic_send_req_caps(adapter, 0);
3309 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3310 struct ibmvnic_adapter *adapter)
3312 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3313 struct net_device *netdev = adapter->netdev;
3314 struct device *dev = &adapter->vdev->dev;
3315 u64 *u64_crq = (u64 *)crq;
3318 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3319 (unsigned long int)cpu_to_be64(u64_crq[0]),
3320 (unsigned long int)cpu_to_be64(u64_crq[1]));
3321 switch (gen_crq->first) {
3322 case IBMVNIC_CRQ_INIT_RSP:
3323 switch (gen_crq->cmd) {
3324 case IBMVNIC_CRQ_INIT:
3325 dev_info(dev, "Partner initialized\n");
3326 adapter->from_passive_init = true;
3327 complete(&adapter->init_done);
3329 case IBMVNIC_CRQ_INIT_COMPLETE:
3330 dev_info(dev, "Partner initialization complete\n");
3331 send_version_xchg(adapter);
3334 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3337 case IBMVNIC_CRQ_XPORT_EVENT:
3338 netif_carrier_off(netdev);
3339 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3340 dev_info(dev, "Migrated, re-enabling adapter\n");
3341 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3342 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3343 dev_info(dev, "Backing device failover detected\n");
3344 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3346 /* The adapter lost the connection */
3347 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3349 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3352 case IBMVNIC_CRQ_CMD_RSP:
3355 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3360 switch (gen_crq->cmd) {
3361 case VERSION_EXCHANGE_RSP:
3362 rc = crq->version_exchange_rsp.rc.code;
3364 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3367 dev_info(dev, "Partner protocol version is %d\n",
3368 crq->version_exchange_rsp.version);
3369 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3372 be16_to_cpu(crq->version_exchange_rsp.version);
3373 send_cap_queries(adapter);
3375 case QUERY_CAPABILITY_RSP:
3376 handle_query_cap_rsp(crq, adapter);
3379 handle_query_map_rsp(crq, adapter);
3381 case REQUEST_MAP_RSP:
3382 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
3383 complete(&adapter->fw_done);
3385 case REQUEST_UNMAP_RSP:
3386 handle_request_unmap_rsp(crq, adapter);
3388 case REQUEST_CAPABILITY_RSP:
3389 handle_request_cap_rsp(crq, adapter);
3392 netdev_dbg(netdev, "Got Login Response\n");
3393 handle_login_rsp(crq, adapter);
3395 case LOGICAL_LINK_STATE_RSP:
3397 "Got Logical Link State Response, state: %d rc: %d\n",
3398 crq->logical_link_state_rsp.link_state,
3399 crq->logical_link_state_rsp.rc.code);
3400 adapter->logical_link_state =
3401 crq->logical_link_state_rsp.link_state;
3402 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3403 complete(&adapter->init_done);
3405 case LINK_STATE_INDICATION:
3406 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3407 adapter->phys_link_state =
3408 crq->link_state_indication.phys_link_state;
3409 adapter->logical_link_state =
3410 crq->link_state_indication.logical_link_state;
3412 case CHANGE_MAC_ADDR_RSP:
3413 netdev_dbg(netdev, "Got MAC address change Response\n");
3414 handle_change_mac_rsp(crq, adapter);
3416 case ERROR_INDICATION:
3417 netdev_dbg(netdev, "Got Error Indication\n");
3418 handle_error_indication(crq, adapter);
3420 case REQUEST_ERROR_RSP:
3421 netdev_dbg(netdev, "Got Error Detail Response\n");
3422 handle_error_info_rsp(crq, adapter);
3424 case REQUEST_STATISTICS_RSP:
3425 netdev_dbg(netdev, "Got Statistics Response\n");
3426 complete(&adapter->stats_done);
3428 case QUERY_IP_OFFLOAD_RSP:
3429 netdev_dbg(netdev, "Got Query IP offload Response\n");
3430 handle_query_ip_offload_rsp(adapter);
3432 case MULTICAST_CTRL_RSP:
3433 netdev_dbg(netdev, "Got multicast control Response\n");
3435 case CONTROL_IP_OFFLOAD_RSP:
3436 netdev_dbg(netdev, "Got Control IP offload Response\n");
3437 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3438 sizeof(adapter->ip_offload_ctrl),
3440 complete(&adapter->init_done);
3442 case COLLECT_FW_TRACE_RSP:
3443 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3444 complete(&adapter->fw_done);
3447 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3452 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3454 struct ibmvnic_adapter *adapter = instance;
3456 tasklet_schedule(&adapter->tasklet);
3460 static void ibmvnic_tasklet(void *data)
3462 struct ibmvnic_adapter *adapter = data;
3463 struct ibmvnic_crq_queue *queue = &adapter->crq;
3464 union ibmvnic_crq *crq;
3465 unsigned long flags;
3468 spin_lock_irqsave(&queue->lock, flags);
3470 /* Pull all the valid messages off the CRQ */
3471 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3472 ibmvnic_handle_crq(crq, adapter);
3473 crq->generic.first = 0;
3476 /* remain in tasklet until all
3477 * capabilities responses are received
3479 if (!adapter->wait_capability)
3482 /* if capabilities CRQ's were sent in this tasklet, the following
3483 * tasklet must wait until all responses are received
3485 if (atomic_read(&adapter->running_cap_crqs) != 0)
3486 adapter->wait_capability = true;
3487 spin_unlock_irqrestore(&queue->lock, flags);
3490 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3492 struct vio_dev *vdev = adapter->vdev;
3496 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3497 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3500 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3505 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3507 struct ibmvnic_crq_queue *crq = &adapter->crq;
3508 struct device *dev = &adapter->vdev->dev;
3509 struct vio_dev *vdev = adapter->vdev;
3514 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3515 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3517 /* Clean out the queue */
3518 memset(crq->msgs, 0, PAGE_SIZE);
3521 /* And re-open it again */
3522 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3523 crq->msg_token, PAGE_SIZE);
3526 /* Adapter is good, but other end is not ready */
3527 dev_warn(dev, "Partner adapter not ready\n");
3529 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3534 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3536 struct ibmvnic_crq_queue *crq = &adapter->crq;
3537 struct vio_dev *vdev = adapter->vdev;
3543 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3544 free_irq(vdev->irq, adapter);
3545 tasklet_kill(&adapter->tasklet);
3547 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3548 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3550 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3552 free_page((unsigned long)crq->msgs);
3556 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3558 struct ibmvnic_crq_queue *crq = &adapter->crq;
3559 struct device *dev = &adapter->vdev->dev;
3560 struct vio_dev *vdev = adapter->vdev;
3561 int rc, retrc = -ENOMEM;
3566 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3567 /* Should we allocate more than one page? */
3572 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3573 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3575 if (dma_mapping_error(dev, crq->msg_token))
3578 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3579 crq->msg_token, PAGE_SIZE);
3581 if (rc == H_RESOURCE)
3582 /* maybe kexecing and resource is busy. try a reset */
3583 rc = ibmvnic_reset_crq(adapter);
3586 if (rc == H_CLOSED) {
3587 dev_warn(dev, "Partner adapter not ready\n");
3589 dev_warn(dev, "Error %d opening adapter\n", rc);
3590 goto reg_crq_failed;
3595 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3596 (unsigned long)adapter);
3598 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3599 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3602 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3604 goto req_irq_failed;
3607 rc = vio_enable_interrupts(vdev);
3609 dev_err(dev, "Error %d enabling interrupts\n", rc);
3610 goto req_irq_failed;
3614 spin_lock_init(&crq->lock);
3619 tasklet_kill(&adapter->tasklet);
3621 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3622 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3624 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3626 free_page((unsigned long)crq->msgs);
3631 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3633 struct device *dev = &adapter->vdev->dev;
3634 unsigned long timeout = msecs_to_jiffies(30000);
3637 if (adapter->resetting) {
3638 rc = ibmvnic_reset_crq(adapter);
3640 rc = vio_enable_interrupts(adapter->vdev);
3642 rc = init_crq_queue(adapter);
3646 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3650 adapter->from_passive_init = false;
3652 init_completion(&adapter->init_done);
3653 adapter->init_done_rc = 0;
3654 ibmvnic_send_crq_init(adapter);
3655 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3656 dev_err(dev, "Initialization sequence timed out\n");
3660 if (adapter->init_done_rc) {
3661 release_crq_queue(adapter);
3662 return adapter->init_done_rc;
3665 if (adapter->from_passive_init) {
3666 adapter->state = VNIC_OPEN;
3667 adapter->from_passive_init = false;
3671 if (adapter->resetting)
3672 rc = reset_sub_crq_queues(adapter);
3674 rc = init_sub_crqs(adapter);
3676 dev_err(dev, "Initialization of sub crqs failed\n");
3677 release_crq_queue(adapter);
3681 rc = init_sub_crq_irqs(adapter);
3683 dev_err(dev, "Failed to initialize sub crq irqs\n");
3684 release_crq_queue(adapter);
3690 static struct device_attribute dev_attr_failover;
3692 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3694 struct ibmvnic_adapter *adapter;
3695 struct net_device *netdev;
3696 unsigned char *mac_addr_p;
3699 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3702 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3703 VETH_MAC_ADDR, NULL);
3706 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3707 __FILE__, __LINE__);
3711 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3712 IBMVNIC_MAX_TX_QUEUES);
3716 adapter = netdev_priv(netdev);
3717 adapter->state = VNIC_PROBING;
3718 dev_set_drvdata(&dev->dev, netdev);
3719 adapter->vdev = dev;
3720 adapter->netdev = netdev;
3722 ether_addr_copy(adapter->mac_addr, mac_addr_p);
3723 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3724 netdev->irq = dev->irq;
3725 netdev->netdev_ops = &ibmvnic_netdev_ops;
3726 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3727 SET_NETDEV_DEV(netdev, &dev->dev);
3729 spin_lock_init(&adapter->stats_lock);
3731 INIT_LIST_HEAD(&adapter->errors);
3732 spin_lock_init(&adapter->error_list_lock);
3734 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3735 INIT_LIST_HEAD(&adapter->rwi_list);
3736 mutex_init(&adapter->reset_lock);
3737 mutex_init(&adapter->rwi_lock);
3738 adapter->resetting = false;
3741 rc = ibmvnic_init(adapter);
3742 if (rc && rc != EAGAIN) {
3743 free_netdev(netdev);
3746 } while (rc == EAGAIN);
3748 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3750 rc = device_create_file(&dev->dev, &dev_attr_failover);
3752 free_netdev(netdev);
3756 rc = register_netdev(netdev);
3758 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3759 device_remove_file(&dev->dev, &dev_attr_failover);
3760 free_netdev(netdev);
3763 dev_info(&dev->dev, "ibmvnic registered\n");
3765 adapter->state = VNIC_PROBED;
3769 static int ibmvnic_remove(struct vio_dev *dev)
3771 struct net_device *netdev = dev_get_drvdata(&dev->dev);
3772 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3774 adapter->state = VNIC_REMOVING;
3775 unregister_netdev(netdev);
3776 mutex_lock(&adapter->reset_lock);
3778 release_resources(adapter);
3779 release_sub_crqs(adapter);
3780 release_crq_queue(adapter);
3782 adapter->state = VNIC_REMOVED;
3784 mutex_unlock(&adapter->reset_lock);
3785 device_remove_file(&dev->dev, &dev_attr_failover);
3786 free_netdev(netdev);
3787 dev_set_drvdata(&dev->dev, NULL);
3792 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
3793 const char *buf, size_t count)
3795 struct net_device *netdev = dev_get_drvdata(dev);
3796 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3797 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
3798 __be64 session_token;
3801 if (!sysfs_streq(buf, "1"))
3804 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
3805 H_GET_SESSION_TOKEN, 0, 0, 0);
3807 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
3812 session_token = (__be64)retbuf[0];
3813 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
3814 be64_to_cpu(session_token));
3815 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3816 H_SESSION_ERR_DETECTED, session_token, 0, 0);
3818 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
3826 static DEVICE_ATTR(failover, 0200, NULL, failover_store);
3828 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3830 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3831 struct ibmvnic_adapter *adapter;
3832 struct iommu_table *tbl;
3833 unsigned long ret = 0;
3836 tbl = get_iommu_table_base(&vdev->dev);
3838 /* netdev inits at probe time along with the structures we need below*/
3840 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3842 adapter = netdev_priv(netdev);
3844 ret += PAGE_SIZE; /* the crq message queue */
3845 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3847 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3848 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3850 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3852 ret += adapter->rx_pool[i].size *
3853 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3858 static int ibmvnic_resume(struct device *dev)
3860 struct net_device *netdev = dev_get_drvdata(dev);
3861 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3864 if (adapter->state != VNIC_OPEN)
3867 /* kick the interrupt handlers just in case we lost an interrupt */
3868 for (i = 0; i < adapter->req_rx_queues; i++)
3869 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3870 adapter->rx_scrq[i]);
3875 static struct vio_device_id ibmvnic_device_table[] = {
3876 {"network", "IBM,vnic"},
3879 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3881 static const struct dev_pm_ops ibmvnic_pm_ops = {
3882 .resume = ibmvnic_resume
3885 static struct vio_driver ibmvnic_driver = {
3886 .id_table = ibmvnic_device_table,
3887 .probe = ibmvnic_probe,
3888 .remove = ibmvnic_remove,
3889 .get_desired_dma = ibmvnic_get_desired_dma,
3890 .name = ibmvnic_driver_name,
3891 .pm = &ibmvnic_pm_ops,
3894 /* module functions */
3895 static int __init ibmvnic_module_init(void)
3897 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3898 IBMVNIC_DRIVER_VERSION);
3900 return vio_register_driver(&ibmvnic_driver);
3903 static void __exit ibmvnic_module_exit(void)
3905 vio_unregister_driver(&ibmvnic_driver);
3908 module_init(ibmvnic_module_init);
3909 module_exit(ibmvnic_module_exit);