1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /**************************************************************************/
4 /* IBM System i and System p Virtual NIC Device Driver */
5 /* Copyright (C) 2014 IBM Corp. */
6 /* Santiago Leon (santi_leon@yahoo.com) */
7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
8 /* John Allen (jallen@linux.vnet.ibm.com) */
11 /* This module contains the implementation of a virtual ethernet device */
12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
13 /* option of the RS/6000 Platform Architecture to interface with virtual */
14 /* ethernet NICs that are presented to the partition by the hypervisor. */
16 /* Messages are passed between the VNIC driver and the VNIC server using */
17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
18 /* issue and receive commands that initiate communication with the server */
19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
20 /* are used by the driver to notify the server that a packet is */
21 /* ready for transmission or that a buffer has been added to receive a */
22 /* packet. Subsequently, sCRQs are used by the server to notify the */
23 /* driver that a packet transmission has been completed or that a packet */
24 /* has been received and placed in a waiting buffer. */
26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
27 /* which skbs are DMA mapped and immediately unmapped when the transmit */
28 /* or receive has been completed, the VNIC driver is required to use */
29 /* "long term mapping". This entails that large, continuous DMA mapped */
30 /* buffers are allocated on driver initialization and these buffers are */
31 /* then continuously reused to pass skbs to and from the VNIC server. */
33 /**************************************************************************/
35 #include <linux/module.h>
36 #include <linux/moduleparam.h>
37 #include <linux/types.h>
38 #include <linux/errno.h>
39 #include <linux/completion.h>
40 #include <linux/ioport.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/kernel.h>
43 #include <linux/netdevice.h>
44 #include <linux/etherdevice.h>
45 #include <linux/skbuff.h>
46 #include <linux/init.h>
47 #include <linux/delay.h>
49 #include <linux/ethtool.h>
50 #include <linux/proc_fs.h>
51 #include <linux/if_arp.h>
54 #include <linux/ipv6.h>
55 #include <linux/irq.h>
56 #include <linux/kthread.h>
57 #include <linux/seq_file.h>
58 #include <linux/interrupt.h>
59 #include <net/net_namespace.h>
60 #include <asm/hvcall.h>
61 #include <linux/atomic.h>
63 #include <asm/iommu.h>
64 #include <linux/uaccess.h>
65 #include <asm/firmware.h>
66 #include <linux/workqueue.h>
67 #include <linux/if_vlan.h>
68 #include <linux/utsname.h>
72 static const char ibmvnic_driver_name[] = "ibmvnic";
73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
75 MODULE_AUTHOR("Santiago Leon");
76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
77 MODULE_LICENSE("GPL");
78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
81 static int ibmvnic_remove(struct vio_dev *);
82 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
87 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
88 union sub_crq *sub_crq);
89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
91 static int enable_scrq_irq(struct ibmvnic_adapter *,
92 struct ibmvnic_sub_crq_queue *);
93 static int disable_scrq_irq(struct ibmvnic_adapter *,
94 struct ibmvnic_sub_crq_queue *);
95 static int pending_scrq(struct ibmvnic_adapter *,
96 struct ibmvnic_sub_crq_queue *);
97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
98 struct ibmvnic_sub_crq_queue *);
99 static int ibmvnic_poll(struct napi_struct *napi, int data);
100 static void send_map_query(struct ibmvnic_adapter *adapter);
101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
102 static int send_request_unmap(struct ibmvnic_adapter *, u8);
103 static int send_login(struct ibmvnic_adapter *adapter);
104 static void send_cap_queries(struct ibmvnic_adapter *adapter);
105 static int init_sub_crqs(struct ibmvnic_adapter *);
106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
107 static int ibmvnic_init(struct ibmvnic_adapter *);
108 static int ibmvnic_reset_init(struct ibmvnic_adapter *);
109 static void release_crq_queue(struct ibmvnic_adapter *);
110 static int __ibmvnic_set_mac(struct net_device *, u8 *);
111 static int init_crq_queue(struct ibmvnic_adapter *adapter);
112 static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
114 struct ibmvnic_stat {
115 char name[ETH_GSTRING_LEN];
119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
120 offsetof(struct ibmvnic_statistics, stat))
121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
123 static const struct ibmvnic_stat ibmvnic_stats[] = {
124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
149 unsigned long length, unsigned long *number,
152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
162 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
163 struct ibmvnic_long_term_buff *ltb, int size)
165 struct device *dev = &adapter->vdev->dev;
169 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
173 dev_err(dev, "Couldn't alloc long term buffer\n");
176 ltb->map_id = adapter->map_id;
179 init_completion(&adapter->fw_done);
180 rc = send_request_map(adapter, ltb->addr,
181 ltb->size, ltb->map_id);
183 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
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);
191 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
197 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
198 struct ibmvnic_long_term_buff *ltb)
200 struct device *dev = &adapter->vdev->dev;
205 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
206 adapter->reset_reason != VNIC_RESET_MOBILITY)
207 send_request_unmap(adapter, ltb->map_id);
208 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
211 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
212 struct ibmvnic_long_term_buff *ltb)
216 memset(ltb->buff, 0, ltb->size);
218 init_completion(&adapter->fw_done);
219 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
222 wait_for_completion(&adapter->fw_done);
224 if (adapter->fw_done_rc) {
225 dev_info(&adapter->vdev->dev,
226 "Reset failed, attempting to free and reallocate buffer\n");
227 free_long_term_buff(adapter, ltb);
228 return alloc_long_term_buff(adapter, ltb, ltb->size);
233 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
237 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
239 adapter->rx_pool[i].active = 0;
242 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
243 struct ibmvnic_rx_pool *pool)
245 int count = pool->size - atomic_read(&pool->available);
246 struct device *dev = &adapter->vdev->dev;
247 int buffers_added = 0;
248 unsigned long lpar_rc;
249 union sub_crq sub_crq;
262 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
263 be32_to_cpu(adapter->login_rsp_buf->
266 for (i = 0; i < count; ++i) {
267 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
269 dev_err(dev, "Couldn't replenish rx buff\n");
270 adapter->replenish_no_mem++;
274 index = pool->free_map[pool->next_free];
276 if (pool->rx_buff[index].skb)
277 dev_err(dev, "Inconsistent free_map!\n");
279 /* Copy the skb to the long term mapped DMA buffer */
280 offset = index * pool->buff_size;
281 dst = pool->long_term_buff.buff + offset;
282 memset(dst, 0, pool->buff_size);
283 dma_addr = pool->long_term_buff.addr + offset;
284 pool->rx_buff[index].data = dst;
286 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
287 pool->rx_buff[index].dma = dma_addr;
288 pool->rx_buff[index].skb = skb;
289 pool->rx_buff[index].pool_index = pool->index;
290 pool->rx_buff[index].size = pool->buff_size;
292 memset(&sub_crq, 0, sizeof(sub_crq));
293 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
294 sub_crq.rx_add.correlator =
295 cpu_to_be64((u64)&pool->rx_buff[index]);
296 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
297 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
299 /* The length field of the sCRQ is defined to be 24 bits so the
300 * buffer size needs to be left shifted by a byte before it is
301 * converted to big endian to prevent the last byte from being
304 #ifdef __LITTLE_ENDIAN__
307 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
309 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
311 if (lpar_rc != H_SUCCESS)
315 adapter->replenish_add_buff_success++;
316 pool->next_free = (pool->next_free + 1) % pool->size;
318 atomic_add(buffers_added, &pool->available);
322 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
323 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
324 pool->free_map[pool->next_free] = index;
325 pool->rx_buff[index].skb = NULL;
327 dev_kfree_skb_any(skb);
328 adapter->replenish_add_buff_failure++;
329 atomic_add(buffers_added, &pool->available);
331 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
332 /* Disable buffer pool replenishment and report carrier off if
333 * queue is closed or pending failover.
334 * Firmware guarantees that a signal will be sent to the
335 * driver, triggering a reset.
337 deactivate_rx_pools(adapter);
338 netif_carrier_off(adapter->netdev);
342 static void replenish_pools(struct ibmvnic_adapter *adapter)
346 adapter->replenish_task_cycles++;
347 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
349 if (adapter->rx_pool[i].active)
350 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
354 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
356 kfree(adapter->tx_stats_buffers);
357 kfree(adapter->rx_stats_buffers);
358 adapter->tx_stats_buffers = NULL;
359 adapter->rx_stats_buffers = NULL;
362 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
364 adapter->tx_stats_buffers =
365 kcalloc(IBMVNIC_MAX_QUEUES,
366 sizeof(struct ibmvnic_tx_queue_stats),
368 if (!adapter->tx_stats_buffers)
371 adapter->rx_stats_buffers =
372 kcalloc(IBMVNIC_MAX_QUEUES,
373 sizeof(struct ibmvnic_rx_queue_stats),
375 if (!adapter->rx_stats_buffers)
381 static void release_stats_token(struct ibmvnic_adapter *adapter)
383 struct device *dev = &adapter->vdev->dev;
385 if (!adapter->stats_token)
388 dma_unmap_single(dev, adapter->stats_token,
389 sizeof(struct ibmvnic_statistics),
391 adapter->stats_token = 0;
394 static int init_stats_token(struct ibmvnic_adapter *adapter)
396 struct device *dev = &adapter->vdev->dev;
399 stok = dma_map_single(dev, &adapter->stats,
400 sizeof(struct ibmvnic_statistics),
402 if (dma_mapping_error(dev, stok)) {
403 dev_err(dev, "Couldn't map stats buffer\n");
407 adapter->stats_token = stok;
408 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
412 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
414 struct ibmvnic_rx_pool *rx_pool;
419 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
420 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
422 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
423 for (i = 0; i < rx_scrqs; i++) {
424 rx_pool = &adapter->rx_pool[i];
426 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
428 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
429 free_long_term_buff(adapter, &rx_pool->long_term_buff);
430 rx_pool->buff_size = be64_to_cpu(size_array[i]);
431 rc = alloc_long_term_buff(adapter,
432 &rx_pool->long_term_buff,
436 rc = reset_long_term_buff(adapter,
437 &rx_pool->long_term_buff);
443 for (j = 0; j < rx_pool->size; j++)
444 rx_pool->free_map[j] = j;
446 memset(rx_pool->rx_buff, 0,
447 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
449 atomic_set(&rx_pool->available, 0);
450 rx_pool->next_alloc = 0;
451 rx_pool->next_free = 0;
458 static void release_rx_pools(struct ibmvnic_adapter *adapter)
460 struct ibmvnic_rx_pool *rx_pool;
463 if (!adapter->rx_pool)
466 for (i = 0; i < adapter->num_active_rx_pools; i++) {
467 rx_pool = &adapter->rx_pool[i];
469 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
471 kfree(rx_pool->free_map);
472 free_long_term_buff(adapter, &rx_pool->long_term_buff);
474 if (!rx_pool->rx_buff)
477 for (j = 0; j < rx_pool->size; j++) {
478 if (rx_pool->rx_buff[j].skb) {
479 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
480 rx_pool->rx_buff[j].skb = NULL;
484 kfree(rx_pool->rx_buff);
487 kfree(adapter->rx_pool);
488 adapter->rx_pool = NULL;
489 adapter->num_active_rx_pools = 0;
492 static int init_rx_pools(struct net_device *netdev)
494 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
495 struct device *dev = &adapter->vdev->dev;
496 struct ibmvnic_rx_pool *rx_pool;
502 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
503 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
504 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
506 adapter->rx_pool = kcalloc(rxadd_subcrqs,
507 sizeof(struct ibmvnic_rx_pool),
509 if (!adapter->rx_pool) {
510 dev_err(dev, "Failed to allocate rx pools\n");
514 adapter->num_active_rx_pools = rxadd_subcrqs;
516 for (i = 0; i < rxadd_subcrqs; i++) {
517 rx_pool = &adapter->rx_pool[i];
519 netdev_dbg(adapter->netdev,
520 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
521 i, adapter->req_rx_add_entries_per_subcrq,
522 be64_to_cpu(size_array[i]));
524 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
526 rx_pool->buff_size = be64_to_cpu(size_array[i]);
529 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
531 if (!rx_pool->free_map) {
532 release_rx_pools(adapter);
536 rx_pool->rx_buff = kcalloc(rx_pool->size,
537 sizeof(struct ibmvnic_rx_buff),
539 if (!rx_pool->rx_buff) {
540 dev_err(dev, "Couldn't alloc rx buffers\n");
541 release_rx_pools(adapter);
545 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
546 rx_pool->size * rx_pool->buff_size)) {
547 release_rx_pools(adapter);
551 for (j = 0; j < rx_pool->size; ++j)
552 rx_pool->free_map[j] = j;
554 atomic_set(&rx_pool->available, 0);
555 rx_pool->next_alloc = 0;
556 rx_pool->next_free = 0;
562 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
563 struct ibmvnic_tx_pool *tx_pool)
567 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
571 memset(tx_pool->tx_buff, 0,
572 tx_pool->num_buffers *
573 sizeof(struct ibmvnic_tx_buff));
575 for (i = 0; i < tx_pool->num_buffers; i++)
576 tx_pool->free_map[i] = i;
578 tx_pool->consumer_index = 0;
579 tx_pool->producer_index = 0;
584 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
589 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
590 for (i = 0; i < tx_scrqs; i++) {
591 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
594 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
602 static void release_vpd_data(struct ibmvnic_adapter *adapter)
607 kfree(adapter->vpd->buff);
613 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
614 struct ibmvnic_tx_pool *tx_pool)
616 kfree(tx_pool->tx_buff);
617 kfree(tx_pool->free_map);
618 free_long_term_buff(adapter, &tx_pool->long_term_buff);
621 static void release_tx_pools(struct ibmvnic_adapter *adapter)
625 if (!adapter->tx_pool)
628 for (i = 0; i < adapter->num_active_tx_pools; i++) {
629 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
630 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
633 kfree(adapter->tx_pool);
634 adapter->tx_pool = NULL;
635 kfree(adapter->tso_pool);
636 adapter->tso_pool = NULL;
637 adapter->num_active_tx_pools = 0;
640 static int init_one_tx_pool(struct net_device *netdev,
641 struct ibmvnic_tx_pool *tx_pool,
642 int num_entries, int buf_size)
644 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
647 tx_pool->tx_buff = kcalloc(num_entries,
648 sizeof(struct ibmvnic_tx_buff),
650 if (!tx_pool->tx_buff)
653 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
654 num_entries * buf_size))
657 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
658 if (!tx_pool->free_map)
661 for (i = 0; i < num_entries; i++)
662 tx_pool->free_map[i] = i;
664 tx_pool->consumer_index = 0;
665 tx_pool->producer_index = 0;
666 tx_pool->num_buffers = num_entries;
667 tx_pool->buf_size = buf_size;
672 static int init_tx_pools(struct net_device *netdev)
674 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
678 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
679 adapter->tx_pool = kcalloc(tx_subcrqs,
680 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
681 if (!adapter->tx_pool)
684 adapter->tso_pool = kcalloc(tx_subcrqs,
685 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
686 if (!adapter->tso_pool)
689 adapter->num_active_tx_pools = tx_subcrqs;
691 for (i = 0; i < tx_subcrqs; i++) {
692 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
693 adapter->req_tx_entries_per_subcrq,
694 adapter->req_mtu + VLAN_HLEN);
696 release_tx_pools(adapter);
700 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
704 release_tx_pools(adapter);
712 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
716 if (adapter->napi_enabled)
719 for (i = 0; i < adapter->req_rx_queues; i++)
720 napi_enable(&adapter->napi[i]);
722 adapter->napi_enabled = true;
725 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
729 if (!adapter->napi_enabled)
732 for (i = 0; i < adapter->req_rx_queues; i++) {
733 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
734 napi_disable(&adapter->napi[i]);
737 adapter->napi_enabled = false;
740 static int init_napi(struct ibmvnic_adapter *adapter)
744 adapter->napi = kcalloc(adapter->req_rx_queues,
745 sizeof(struct napi_struct), GFP_KERNEL);
749 for (i = 0; i < adapter->req_rx_queues; i++) {
750 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
751 netif_napi_add(adapter->netdev, &adapter->napi[i],
752 ibmvnic_poll, NAPI_POLL_WEIGHT);
755 adapter->num_active_rx_napi = adapter->req_rx_queues;
759 static void release_napi(struct ibmvnic_adapter *adapter)
766 for (i = 0; i < adapter->num_active_rx_napi; i++) {
767 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
768 netif_napi_del(&adapter->napi[i]);
771 kfree(adapter->napi);
772 adapter->napi = NULL;
773 adapter->num_active_rx_napi = 0;
774 adapter->napi_enabled = false;
777 static int ibmvnic_login(struct net_device *netdev)
779 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
780 unsigned long timeout = msecs_to_jiffies(30000);
787 if (retry_count > IBMVNIC_MAX_QUEUES) {
788 netdev_warn(netdev, "Login attempts exceeded\n");
792 adapter->init_done_rc = 0;
793 reinit_completion(&adapter->init_done);
794 rc = send_login(adapter);
796 netdev_warn(netdev, "Unable to login\n");
800 if (!wait_for_completion_timeout(&adapter->init_done,
802 netdev_warn(netdev, "Login timed out\n");
806 if (adapter->init_done_rc == PARTIALSUCCESS) {
808 release_sub_crqs(adapter, 1);
812 "Received partial success, retrying...\n");
813 adapter->init_done_rc = 0;
814 reinit_completion(&adapter->init_done);
815 send_cap_queries(adapter);
816 if (!wait_for_completion_timeout(&adapter->init_done,
819 "Capabilities query timed out\n");
823 rc = init_sub_crqs(adapter);
826 "SCRQ initialization failed\n");
830 rc = init_sub_crq_irqs(adapter);
833 "SCRQ irq initialization failed\n");
836 } else if (adapter->init_done_rc) {
837 netdev_warn(netdev, "Adapter login failed\n");
842 __ibmvnic_set_mac(netdev, adapter->mac_addr);
847 static void release_login_buffer(struct ibmvnic_adapter *adapter)
849 kfree(adapter->login_buf);
850 adapter->login_buf = NULL;
853 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
855 kfree(adapter->login_rsp_buf);
856 adapter->login_rsp_buf = NULL;
859 static void release_resources(struct ibmvnic_adapter *adapter)
861 release_vpd_data(adapter);
863 release_tx_pools(adapter);
864 release_rx_pools(adapter);
866 release_napi(adapter);
867 release_login_rsp_buffer(adapter);
870 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
872 struct net_device *netdev = adapter->netdev;
873 unsigned long timeout = msecs_to_jiffies(30000);
874 union ibmvnic_crq crq;
878 netdev_dbg(netdev, "setting link state %d\n", link_state);
880 memset(&crq, 0, sizeof(crq));
881 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
882 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
883 crq.logical_link_state.link_state = link_state;
888 reinit_completion(&adapter->init_done);
889 rc = ibmvnic_send_crq(adapter, &crq);
891 netdev_err(netdev, "Failed to set link state\n");
895 if (!wait_for_completion_timeout(&adapter->init_done,
897 netdev_err(netdev, "timeout setting link state\n");
901 if (adapter->init_done_rc == 1) {
902 /* Partuial success, delay and re-send */
905 } else if (adapter->init_done_rc) {
906 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
907 adapter->init_done_rc);
908 return adapter->init_done_rc;
915 static int set_real_num_queues(struct net_device *netdev)
917 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
920 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
921 adapter->req_tx_queues, adapter->req_rx_queues);
923 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
925 netdev_err(netdev, "failed to set the number of tx queues\n");
929 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
931 netdev_err(netdev, "failed to set the number of rx queues\n");
936 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
938 struct device *dev = &adapter->vdev->dev;
939 union ibmvnic_crq crq;
943 if (adapter->vpd->buff)
944 len = adapter->vpd->len;
946 init_completion(&adapter->fw_done);
947 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
948 crq.get_vpd_size.cmd = GET_VPD_SIZE;
949 rc = ibmvnic_send_crq(adapter, &crq);
952 wait_for_completion(&adapter->fw_done);
954 if (!adapter->vpd->len)
957 if (!adapter->vpd->buff)
958 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
959 else if (adapter->vpd->len != len)
961 krealloc(adapter->vpd->buff,
962 adapter->vpd->len, GFP_KERNEL);
964 if (!adapter->vpd->buff) {
965 dev_err(dev, "Could allocate VPD buffer\n");
969 adapter->vpd->dma_addr =
970 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
972 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
973 dev_err(dev, "Could not map VPD buffer\n");
974 kfree(adapter->vpd->buff);
975 adapter->vpd->buff = NULL;
979 reinit_completion(&adapter->fw_done);
980 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
981 crq.get_vpd.cmd = GET_VPD;
982 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
983 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
984 rc = ibmvnic_send_crq(adapter, &crq);
986 kfree(adapter->vpd->buff);
987 adapter->vpd->buff = NULL;
990 wait_for_completion(&adapter->fw_done);
995 static int init_resources(struct ibmvnic_adapter *adapter)
997 struct net_device *netdev = adapter->netdev;
1000 rc = set_real_num_queues(netdev);
1004 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1008 /* Vital Product Data (VPD) */
1009 rc = ibmvnic_get_vpd(adapter);
1011 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1015 adapter->map_id = 1;
1017 rc = init_napi(adapter);
1021 send_map_query(adapter);
1023 rc = init_rx_pools(netdev);
1027 rc = init_tx_pools(netdev);
1031 static int __ibmvnic_open(struct net_device *netdev)
1033 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1034 enum vnic_state prev_state = adapter->state;
1037 adapter->state = VNIC_OPENING;
1038 replenish_pools(adapter);
1039 ibmvnic_napi_enable(adapter);
1041 /* We're ready to receive frames, enable the sub-crq interrupts and
1042 * set the logical link state to up
1044 for (i = 0; i < adapter->req_rx_queues; i++) {
1045 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1046 if (prev_state == VNIC_CLOSED)
1047 enable_irq(adapter->rx_scrq[i]->irq);
1048 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1051 for (i = 0; i < adapter->req_tx_queues; i++) {
1052 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1053 if (prev_state == VNIC_CLOSED)
1054 enable_irq(adapter->tx_scrq[i]->irq);
1055 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1058 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1060 for (i = 0; i < adapter->req_rx_queues; i++)
1061 napi_disable(&adapter->napi[i]);
1062 release_resources(adapter);
1066 netif_tx_start_all_queues(netdev);
1068 if (prev_state == VNIC_CLOSED) {
1069 for (i = 0; i < adapter->req_rx_queues; i++)
1070 napi_schedule(&adapter->napi[i]);
1073 adapter->state = VNIC_OPEN;
1077 static int ibmvnic_open(struct net_device *netdev)
1079 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1082 /* If device failover is pending, just set device state and return.
1083 * Device operation will be handled by reset routine.
1085 if (adapter->failover_pending) {
1086 adapter->state = VNIC_OPEN;
1090 if (adapter->state != VNIC_CLOSED) {
1091 rc = ibmvnic_login(netdev);
1095 rc = init_resources(adapter);
1097 netdev_err(netdev, "failed to initialize resources\n");
1098 release_resources(adapter);
1103 rc = __ibmvnic_open(netdev);
1108 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1110 struct ibmvnic_rx_pool *rx_pool;
1111 struct ibmvnic_rx_buff *rx_buff;
1116 if (!adapter->rx_pool)
1119 rx_scrqs = adapter->num_active_rx_pools;
1120 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1122 /* Free any remaining skbs in the rx buffer pools */
1123 for (i = 0; i < rx_scrqs; i++) {
1124 rx_pool = &adapter->rx_pool[i];
1125 if (!rx_pool || !rx_pool->rx_buff)
1128 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1129 for (j = 0; j < rx_entries; j++) {
1130 rx_buff = &rx_pool->rx_buff[j];
1131 if (rx_buff && rx_buff->skb) {
1132 dev_kfree_skb_any(rx_buff->skb);
1133 rx_buff->skb = NULL;
1139 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1140 struct ibmvnic_tx_pool *tx_pool)
1142 struct ibmvnic_tx_buff *tx_buff;
1146 if (!tx_pool || !tx_pool->tx_buff)
1149 tx_entries = tx_pool->num_buffers;
1151 for (i = 0; i < tx_entries; i++) {
1152 tx_buff = &tx_pool->tx_buff[i];
1153 if (tx_buff && tx_buff->skb) {
1154 dev_kfree_skb_any(tx_buff->skb);
1155 tx_buff->skb = NULL;
1160 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1165 if (!adapter->tx_pool || !adapter->tso_pool)
1168 tx_scrqs = adapter->num_active_tx_pools;
1170 /* Free any remaining skbs in the tx buffer pools */
1171 for (i = 0; i < tx_scrqs; i++) {
1172 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1173 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1174 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1178 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1180 struct net_device *netdev = adapter->netdev;
1183 if (adapter->tx_scrq) {
1184 for (i = 0; i < adapter->req_tx_queues; i++)
1185 if (adapter->tx_scrq[i]->irq) {
1187 "Disabling tx_scrq[%d] irq\n", i);
1188 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1189 disable_irq(adapter->tx_scrq[i]->irq);
1193 if (adapter->rx_scrq) {
1194 for (i = 0; i < adapter->req_rx_queues; i++) {
1195 if (adapter->rx_scrq[i]->irq) {
1197 "Disabling rx_scrq[%d] irq\n", i);
1198 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1199 disable_irq(adapter->rx_scrq[i]->irq);
1205 static void ibmvnic_cleanup(struct net_device *netdev)
1207 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1209 /* ensure that transmissions are stopped if called by do_reset */
1210 if (adapter->resetting)
1211 netif_tx_disable(netdev);
1213 netif_tx_stop_all_queues(netdev);
1215 ibmvnic_napi_disable(adapter);
1216 ibmvnic_disable_irqs(adapter);
1218 clean_rx_pools(adapter);
1219 clean_tx_pools(adapter);
1222 static int __ibmvnic_close(struct net_device *netdev)
1224 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1227 adapter->state = VNIC_CLOSING;
1228 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1231 adapter->state = VNIC_CLOSED;
1235 static int ibmvnic_close(struct net_device *netdev)
1237 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1240 /* If device failover is pending, just set device state and return.
1241 * Device operation will be handled by reset routine.
1243 if (adapter->failover_pending) {
1244 adapter->state = VNIC_CLOSED;
1248 rc = __ibmvnic_close(netdev);
1249 ibmvnic_cleanup(netdev);
1255 * build_hdr_data - creates L2/L3/L4 header data buffer
1256 * @hdr_field - bitfield determining needed headers
1257 * @skb - socket buffer
1258 * @hdr_len - array of header lengths
1259 * @tot_len - total length of data
1261 * Reads hdr_field to determine which headers are needed by firmware.
1262 * Builds a buffer containing these headers. Saves individual header
1263 * lengths and total buffer length to be used to build descriptors.
1265 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1266 int *hdr_len, u8 *hdr_data)
1271 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1272 hdr_len[0] = sizeof(struct vlan_ethhdr);
1274 hdr_len[0] = sizeof(struct ethhdr);
1276 if (skb->protocol == htons(ETH_P_IP)) {
1277 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1278 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1279 hdr_len[2] = tcp_hdrlen(skb);
1280 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1281 hdr_len[2] = sizeof(struct udphdr);
1282 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1283 hdr_len[1] = sizeof(struct ipv6hdr);
1284 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1285 hdr_len[2] = tcp_hdrlen(skb);
1286 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1287 hdr_len[2] = sizeof(struct udphdr);
1288 } else if (skb->protocol == htons(ETH_P_ARP)) {
1289 hdr_len[1] = arp_hdr_len(skb->dev);
1293 memset(hdr_data, 0, 120);
1294 if ((hdr_field >> 6) & 1) {
1295 hdr = skb_mac_header(skb);
1296 memcpy(hdr_data, hdr, hdr_len[0]);
1300 if ((hdr_field >> 5) & 1) {
1301 hdr = skb_network_header(skb);
1302 memcpy(hdr_data + len, hdr, hdr_len[1]);
1306 if ((hdr_field >> 4) & 1) {
1307 hdr = skb_transport_header(skb);
1308 memcpy(hdr_data + len, hdr, hdr_len[2]);
1315 * create_hdr_descs - create header and header extension descriptors
1316 * @hdr_field - bitfield determining needed headers
1317 * @data - buffer containing header data
1318 * @len - length of data buffer
1319 * @hdr_len - array of individual header lengths
1320 * @scrq_arr - descriptor array
1322 * Creates header and, if needed, header extension descriptors and
1323 * places them in a descriptor array, scrq_arr
1326 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1327 union sub_crq *scrq_arr)
1329 union sub_crq hdr_desc;
1335 while (tmp_len > 0) {
1336 cur = hdr_data + len - tmp_len;
1338 memset(&hdr_desc, 0, sizeof(hdr_desc));
1339 if (cur != hdr_data) {
1340 data = hdr_desc.hdr_ext.data;
1341 tmp = tmp_len > 29 ? 29 : tmp_len;
1342 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1343 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1344 hdr_desc.hdr_ext.len = tmp;
1346 data = hdr_desc.hdr.data;
1347 tmp = tmp_len > 24 ? 24 : tmp_len;
1348 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1349 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1350 hdr_desc.hdr.len = tmp;
1351 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1352 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1353 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1354 hdr_desc.hdr.flag = hdr_field << 1;
1356 memcpy(data, cur, tmp);
1358 *scrq_arr = hdr_desc;
1367 * build_hdr_descs_arr - build a header descriptor array
1368 * @skb - socket buffer
1369 * @num_entries - number of descriptors to be sent
1370 * @subcrq - first TX descriptor
1371 * @hdr_field - bit field determining which headers will be sent
1373 * This function will build a TX descriptor array with applicable
1374 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1377 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1378 int *num_entries, u8 hdr_field)
1380 int hdr_len[3] = {0, 0, 0};
1382 u8 *hdr_data = txbuff->hdr_data;
1384 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1386 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1387 txbuff->indir_arr + 1);
1390 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1391 struct net_device *netdev)
1393 /* For some backing devices, mishandling of small packets
1394 * can result in a loss of connection or TX stall. Device
1395 * architects recommend that no packet should be smaller
1396 * than the minimum MTU value provided to the driver, so
1397 * pad any packets to that length
1399 if (skb->len < netdev->min_mtu)
1400 return skb_put_padto(skb, netdev->min_mtu);
1405 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1407 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1408 int queue_num = skb_get_queue_mapping(skb);
1409 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1410 struct device *dev = &adapter->vdev->dev;
1411 struct ibmvnic_tx_buff *tx_buff = NULL;
1412 struct ibmvnic_sub_crq_queue *tx_scrq;
1413 struct ibmvnic_tx_pool *tx_pool;
1414 unsigned int tx_send_failed = 0;
1415 unsigned int tx_map_failed = 0;
1416 unsigned int tx_dropped = 0;
1417 unsigned int tx_packets = 0;
1418 unsigned int tx_bytes = 0;
1419 dma_addr_t data_dma_addr;
1420 struct netdev_queue *txq;
1421 unsigned long lpar_rc;
1422 union sub_crq tx_crq;
1423 unsigned int offset;
1424 int num_entries = 1;
1429 netdev_tx_t ret = NETDEV_TX_OK;
1431 if (adapter->resetting) {
1432 if (!netif_subqueue_stopped(netdev, skb))
1433 netif_stop_subqueue(netdev, queue_num);
1434 dev_kfree_skb_any(skb);
1442 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1448 if (skb_is_gso(skb))
1449 tx_pool = &adapter->tso_pool[queue_num];
1451 tx_pool = &adapter->tx_pool[queue_num];
1453 tx_scrq = adapter->tx_scrq[queue_num];
1454 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1455 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1456 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1458 index = tx_pool->free_map[tx_pool->consumer_index];
1460 if (index == IBMVNIC_INVALID_MAP) {
1461 dev_kfree_skb_any(skb);
1468 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1470 offset = index * tx_pool->buf_size;
1471 dst = tx_pool->long_term_buff.buff + offset;
1472 memset(dst, 0, tx_pool->buf_size);
1473 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1475 if (skb_shinfo(skb)->nr_frags) {
1479 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1480 cur = skb_headlen(skb);
1482 /* Copy the frags */
1483 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1484 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1487 page_address(skb_frag_page(frag)) +
1488 frag->page_offset, skb_frag_size(frag));
1489 cur += skb_frag_size(frag);
1492 skb_copy_from_linear_data(skb, dst, skb->len);
1495 tx_pool->consumer_index =
1496 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1498 tx_buff = &tx_pool->tx_buff[index];
1500 tx_buff->data_dma[0] = data_dma_addr;
1501 tx_buff->data_len[0] = skb->len;
1502 tx_buff->index = index;
1503 tx_buff->pool_index = queue_num;
1504 tx_buff->last_frag = true;
1506 memset(&tx_crq, 0, sizeof(tx_crq));
1507 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1508 tx_crq.v1.type = IBMVNIC_TX_DESC;
1509 tx_crq.v1.n_crq_elem = 1;
1510 tx_crq.v1.n_sge = 1;
1511 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1513 if (skb_is_gso(skb))
1514 tx_crq.v1.correlator =
1515 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1517 tx_crq.v1.correlator = cpu_to_be32(index);
1518 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1519 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1520 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1522 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1523 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1524 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1527 if (skb->protocol == htons(ETH_P_IP)) {
1528 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1529 proto = ip_hdr(skb)->protocol;
1530 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1531 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1532 proto = ipv6_hdr(skb)->nexthdr;
1535 if (proto == IPPROTO_TCP)
1536 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1537 else if (proto == IPPROTO_UDP)
1538 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1540 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1541 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1544 if (skb_is_gso(skb)) {
1545 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1546 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1549 /* determine if l2/3/4 headers are sent to firmware */
1550 if ((*hdrs >> 7) & 1) {
1551 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1552 tx_crq.v1.n_crq_elem = num_entries;
1553 tx_buff->num_entries = num_entries;
1554 tx_buff->indir_arr[0] = tx_crq;
1555 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1556 sizeof(tx_buff->indir_arr),
1558 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1559 dev_kfree_skb_any(skb);
1560 tx_buff->skb = NULL;
1561 if (!firmware_has_feature(FW_FEATURE_CMO))
1562 dev_err(dev, "tx: unable to map descriptor array\n");
1568 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1569 (u64)tx_buff->indir_dma,
1572 tx_buff->num_entries = num_entries;
1573 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1576 if (lpar_rc != H_SUCCESS) {
1577 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1578 dev_err_ratelimited(dev, "tx: send failed\n");
1579 dev_kfree_skb_any(skb);
1580 tx_buff->skb = NULL;
1582 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1583 /* Disable TX and report carrier off if queue is closed
1584 * or pending failover.
1585 * Firmware guarantees that a signal will be sent to the
1586 * driver, triggering a reset or some other action.
1588 netif_tx_stop_all_queues(netdev);
1589 netif_carrier_off(netdev);
1598 if (atomic_add_return(num_entries, &tx_scrq->used)
1599 >= adapter->req_tx_entries_per_subcrq) {
1600 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1601 netif_stop_subqueue(netdev, queue_num);
1605 tx_bytes += skb->len;
1606 txq->trans_start = jiffies;
1611 /* roll back consumer index and map array*/
1612 if (tx_pool->consumer_index == 0)
1613 tx_pool->consumer_index =
1614 tx_pool->num_buffers - 1;
1616 tx_pool->consumer_index--;
1617 tx_pool->free_map[tx_pool->consumer_index] = index;
1619 netdev->stats.tx_dropped += tx_dropped;
1620 netdev->stats.tx_bytes += tx_bytes;
1621 netdev->stats.tx_packets += tx_packets;
1622 adapter->tx_send_failed += tx_send_failed;
1623 adapter->tx_map_failed += tx_map_failed;
1624 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1625 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1626 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1631 static void ibmvnic_set_multi(struct net_device *netdev)
1633 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1634 struct netdev_hw_addr *ha;
1635 union ibmvnic_crq crq;
1637 memset(&crq, 0, sizeof(crq));
1638 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1639 crq.request_capability.cmd = REQUEST_CAPABILITY;
1641 if (netdev->flags & IFF_PROMISC) {
1642 if (!adapter->promisc_supported)
1645 if (netdev->flags & IFF_ALLMULTI) {
1646 /* Accept all multicast */
1647 memset(&crq, 0, sizeof(crq));
1648 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1649 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1650 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1651 ibmvnic_send_crq(adapter, &crq);
1652 } else if (netdev_mc_empty(netdev)) {
1653 /* Reject all multicast */
1654 memset(&crq, 0, sizeof(crq));
1655 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1656 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1657 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1658 ibmvnic_send_crq(adapter, &crq);
1660 /* Accept one or more multicast(s) */
1661 netdev_for_each_mc_addr(ha, netdev) {
1662 memset(&crq, 0, sizeof(crq));
1663 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1664 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1665 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1666 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1668 ibmvnic_send_crq(adapter, &crq);
1674 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1676 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1677 union ibmvnic_crq crq;
1680 if (!is_valid_ether_addr(dev_addr)) {
1681 rc = -EADDRNOTAVAIL;
1685 memset(&crq, 0, sizeof(crq));
1686 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1687 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1688 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1690 init_completion(&adapter->fw_done);
1691 rc = ibmvnic_send_crq(adapter, &crq);
1697 wait_for_completion(&adapter->fw_done);
1698 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1699 if (adapter->fw_done_rc) {
1706 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1710 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1712 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1713 struct sockaddr *addr = p;
1717 ether_addr_copy(adapter->mac_addr, addr->sa_data);
1718 if (adapter->state != VNIC_PROBED)
1719 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
1725 * do_reset returns zero if we are able to keep processing reset events, or
1726 * non-zero if we hit a fatal error and must halt.
1728 static int do_reset(struct ibmvnic_adapter *adapter,
1729 struct ibmvnic_rwi *rwi, u32 reset_state)
1731 u64 old_num_rx_queues, old_num_tx_queues;
1732 u64 old_num_rx_slots, old_num_tx_slots;
1733 struct net_device *netdev = adapter->netdev;
1736 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1739 netif_carrier_off(netdev);
1740 adapter->reset_reason = rwi->reset_reason;
1742 old_num_rx_queues = adapter->req_rx_queues;
1743 old_num_tx_queues = adapter->req_tx_queues;
1744 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1745 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1747 ibmvnic_cleanup(netdev);
1749 if (reset_state == VNIC_OPEN &&
1750 adapter->reset_reason != VNIC_RESET_MOBILITY &&
1751 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1752 rc = __ibmvnic_close(netdev);
1757 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1758 adapter->wait_for_reset) {
1759 release_resources(adapter);
1760 release_sub_crqs(adapter, 1);
1761 release_crq_queue(adapter);
1764 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1765 /* remove the closed state so when we call open it appears
1766 * we are coming from the probed state.
1768 adapter->state = VNIC_PROBED;
1770 if (adapter->wait_for_reset) {
1771 rc = init_crq_queue(adapter);
1772 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1773 rc = ibmvnic_reenable_crq_queue(adapter);
1774 release_sub_crqs(adapter, 1);
1776 rc = ibmvnic_reset_crq(adapter);
1778 rc = vio_enable_interrupts(adapter->vdev);
1782 netdev_err(adapter->netdev,
1783 "Couldn't initialize crq. rc=%d\n", rc);
1787 rc = ibmvnic_reset_init(adapter);
1789 return IBMVNIC_INIT_FAILED;
1791 /* If the adapter was in PROBE state prior to the reset,
1794 if (reset_state == VNIC_PROBED)
1797 rc = ibmvnic_login(netdev);
1799 adapter->state = reset_state;
1803 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1804 adapter->wait_for_reset) {
1805 rc = init_resources(adapter);
1808 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1809 adapter->req_tx_queues != old_num_tx_queues ||
1810 adapter->req_rx_add_entries_per_subcrq !=
1812 adapter->req_tx_entries_per_subcrq !=
1814 release_rx_pools(adapter);
1815 release_tx_pools(adapter);
1816 release_napi(adapter);
1817 release_vpd_data(adapter);
1819 rc = init_resources(adapter);
1824 rc = reset_tx_pools(adapter);
1828 rc = reset_rx_pools(adapter);
1832 ibmvnic_disable_irqs(adapter);
1834 adapter->state = VNIC_CLOSED;
1836 if (reset_state == VNIC_CLOSED)
1839 rc = __ibmvnic_open(netdev);
1841 if (list_empty(&adapter->rwi_list))
1842 adapter->state = VNIC_CLOSED;
1844 adapter->state = reset_state;
1849 /* refresh device's multicast list */
1850 ibmvnic_set_multi(netdev);
1853 for (i = 0; i < adapter->req_rx_queues; i++)
1854 napi_schedule(&adapter->napi[i]);
1856 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1857 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1858 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
1863 static int do_hard_reset(struct ibmvnic_adapter *adapter,
1864 struct ibmvnic_rwi *rwi, u32 reset_state)
1866 struct net_device *netdev = adapter->netdev;
1869 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1872 netif_carrier_off(netdev);
1873 adapter->reset_reason = rwi->reset_reason;
1875 ibmvnic_cleanup(netdev);
1876 release_resources(adapter);
1877 release_sub_crqs(adapter, 0);
1878 release_crq_queue(adapter);
1880 /* remove the closed state so when we call open it appears
1881 * we are coming from the probed state.
1883 adapter->state = VNIC_PROBED;
1885 reinit_completion(&adapter->init_done);
1886 rc = init_crq_queue(adapter);
1888 netdev_err(adapter->netdev,
1889 "Couldn't initialize crq. rc=%d\n", rc);
1893 rc = ibmvnic_init(adapter);
1897 /* If the adapter was in PROBE state prior to the reset,
1900 if (reset_state == VNIC_PROBED)
1903 rc = ibmvnic_login(netdev);
1905 adapter->state = VNIC_PROBED;
1909 rc = init_resources(adapter);
1913 ibmvnic_disable_irqs(adapter);
1914 adapter->state = VNIC_CLOSED;
1916 if (reset_state == VNIC_CLOSED)
1919 rc = __ibmvnic_open(netdev);
1921 if (list_empty(&adapter->rwi_list))
1922 adapter->state = VNIC_CLOSED;
1924 adapter->state = reset_state;
1932 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1934 struct ibmvnic_rwi *rwi;
1935 unsigned long flags;
1937 spin_lock_irqsave(&adapter->rwi_lock, flags);
1939 if (!list_empty(&adapter->rwi_list)) {
1940 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1942 list_del(&rwi->list);
1947 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
1951 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1953 struct ibmvnic_rwi *rwi;
1955 rwi = get_next_rwi(adapter);
1958 rwi = get_next_rwi(adapter);
1962 static void __ibmvnic_reset(struct work_struct *work)
1964 struct ibmvnic_rwi *rwi;
1965 struct ibmvnic_adapter *adapter;
1966 bool we_lock_rtnl = false;
1970 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1972 /* netif_set_real_num_xx_queues needs to take rtnl lock here
1973 * unless wait_for_reset is set, in which case the rtnl lock
1974 * has already been taken before initializing the reset
1976 if (!adapter->wait_for_reset) {
1978 we_lock_rtnl = true;
1980 reset_state = adapter->state;
1982 rwi = get_next_rwi(adapter);
1984 if (adapter->force_reset_recovery) {
1985 adapter->force_reset_recovery = false;
1986 rc = do_hard_reset(adapter, rwi, reset_state);
1988 rc = do_reset(adapter, rwi, reset_state);
1991 if (rc && rc != IBMVNIC_INIT_FAILED &&
1992 !adapter->force_reset_recovery)
1995 rwi = get_next_rwi(adapter);
1998 if (adapter->wait_for_reset) {
1999 adapter->wait_for_reset = false;
2000 adapter->reset_done_rc = rc;
2001 complete(&adapter->reset_done);
2005 netdev_dbg(adapter->netdev, "Reset failed\n");
2006 free_all_rwi(adapter);
2009 adapter->resetting = false;
2014 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2015 enum ibmvnic_reset_reason reason)
2017 struct list_head *entry, *tmp_entry;
2018 struct ibmvnic_rwi *rwi, *tmp;
2019 struct net_device *netdev = adapter->netdev;
2020 unsigned long flags;
2023 if (adapter->state == VNIC_REMOVING ||
2024 adapter->state == VNIC_REMOVED ||
2025 adapter->failover_pending) {
2027 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2031 if (adapter->state == VNIC_PROBING) {
2032 netdev_warn(netdev, "Adapter reset during probe\n");
2033 ret = adapter->init_done_rc = EAGAIN;
2037 spin_lock_irqsave(&adapter->rwi_lock, flags);
2039 list_for_each(entry, &adapter->rwi_list) {
2040 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2041 if (tmp->reset_reason == reason) {
2042 netdev_dbg(netdev, "Skipping matching reset\n");
2043 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2049 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2051 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2052 ibmvnic_close(netdev);
2056 /* if we just received a transport event,
2057 * flush reset queue and process this reset
2059 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2060 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2063 rwi->reset_reason = reason;
2064 list_add_tail(&rwi->list, &adapter->rwi_list);
2065 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2066 adapter->resetting = true;
2067 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2068 schedule_work(&adapter->ibmvnic_reset);
2072 if (adapter->wait_for_reset)
2073 adapter->wait_for_reset = false;
2077 static void ibmvnic_tx_timeout(struct net_device *dev)
2079 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2081 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2084 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2085 struct ibmvnic_rx_buff *rx_buff)
2087 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2089 rx_buff->skb = NULL;
2091 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2092 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2094 atomic_dec(&pool->available);
2097 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2099 struct net_device *netdev = napi->dev;
2100 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2101 int scrq_num = (int)(napi - adapter->napi);
2102 int frames_processed = 0;
2105 while (frames_processed < budget) {
2106 struct sk_buff *skb;
2107 struct ibmvnic_rx_buff *rx_buff;
2108 union sub_crq *next;
2113 if (unlikely(adapter->resetting &&
2114 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2115 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2116 napi_complete_done(napi, frames_processed);
2117 return frames_processed;
2120 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2122 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2124 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2125 rx_comp.correlator);
2126 /* do error checking */
2127 if (next->rx_comp.rc) {
2128 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2129 be16_to_cpu(next->rx_comp.rc));
2130 /* free the entry */
2131 next->rx_comp.first = 0;
2132 dev_kfree_skb_any(rx_buff->skb);
2133 remove_buff_from_pool(adapter, rx_buff);
2135 } else if (!rx_buff->skb) {
2136 /* free the entry */
2137 next->rx_comp.first = 0;
2138 remove_buff_from_pool(adapter, rx_buff);
2142 length = be32_to_cpu(next->rx_comp.len);
2143 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2144 flags = next->rx_comp.flags;
2146 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2149 /* VLAN Header has been stripped by the system firmware and
2150 * needs to be inserted by the driver
2152 if (adapter->rx_vlan_header_insertion &&
2153 (flags & IBMVNIC_VLAN_STRIPPED))
2154 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2155 ntohs(next->rx_comp.vlan_tci));
2157 /* free the entry */
2158 next->rx_comp.first = 0;
2159 remove_buff_from_pool(adapter, rx_buff);
2161 skb_put(skb, length);
2162 skb->protocol = eth_type_trans(skb, netdev);
2163 skb_record_rx_queue(skb, scrq_num);
2165 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2166 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2167 skb->ip_summed = CHECKSUM_UNNECESSARY;
2171 napi_gro_receive(napi, skb); /* send it up */
2172 netdev->stats.rx_packets++;
2173 netdev->stats.rx_bytes += length;
2174 adapter->rx_stats_buffers[scrq_num].packets++;
2175 adapter->rx_stats_buffers[scrq_num].bytes += length;
2179 if (adapter->state != VNIC_CLOSING)
2180 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2182 if (frames_processed < budget) {
2183 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2184 napi_complete_done(napi, frames_processed);
2185 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2186 napi_reschedule(napi)) {
2187 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2191 return frames_processed;
2194 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2198 adapter->fallback.mtu = adapter->req_mtu;
2199 adapter->fallback.rx_queues = adapter->req_rx_queues;
2200 adapter->fallback.tx_queues = adapter->req_tx_queues;
2201 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2202 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2204 init_completion(&adapter->reset_done);
2205 adapter->wait_for_reset = true;
2206 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2209 wait_for_completion(&adapter->reset_done);
2212 if (adapter->reset_done_rc) {
2214 adapter->desired.mtu = adapter->fallback.mtu;
2215 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2216 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2217 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2218 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2220 init_completion(&adapter->reset_done);
2221 adapter->wait_for_reset = true;
2222 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2225 wait_for_completion(&adapter->reset_done);
2227 adapter->wait_for_reset = false;
2232 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2234 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2236 adapter->desired.mtu = new_mtu + ETH_HLEN;
2238 return wait_for_reset(adapter);
2241 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2242 struct net_device *dev,
2243 netdev_features_t features)
2245 /* Some backing hardware adapters can not
2246 * handle packets with a MSS less than 224
2247 * or with only one segment.
2249 if (skb_is_gso(skb)) {
2250 if (skb_shinfo(skb)->gso_size < 224 ||
2251 skb_shinfo(skb)->gso_segs == 1)
2252 features &= ~NETIF_F_GSO_MASK;
2258 static const struct net_device_ops ibmvnic_netdev_ops = {
2259 .ndo_open = ibmvnic_open,
2260 .ndo_stop = ibmvnic_close,
2261 .ndo_start_xmit = ibmvnic_xmit,
2262 .ndo_set_rx_mode = ibmvnic_set_multi,
2263 .ndo_set_mac_address = ibmvnic_set_mac,
2264 .ndo_validate_addr = eth_validate_addr,
2265 .ndo_tx_timeout = ibmvnic_tx_timeout,
2266 .ndo_change_mtu = ibmvnic_change_mtu,
2267 .ndo_features_check = ibmvnic_features_check,
2270 /* ethtool functions */
2272 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2273 struct ethtool_link_ksettings *cmd)
2275 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2278 rc = send_query_phys_parms(adapter);
2280 adapter->speed = SPEED_UNKNOWN;
2281 adapter->duplex = DUPLEX_UNKNOWN;
2283 cmd->base.speed = adapter->speed;
2284 cmd->base.duplex = adapter->duplex;
2285 cmd->base.port = PORT_FIBRE;
2286 cmd->base.phy_address = 0;
2287 cmd->base.autoneg = AUTONEG_ENABLE;
2292 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2293 struct ethtool_drvinfo *info)
2295 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2297 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2298 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2299 strlcpy(info->fw_version, adapter->fw_version,
2300 sizeof(info->fw_version));
2303 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2305 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2307 return adapter->msg_enable;
2310 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2312 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2314 adapter->msg_enable = data;
2317 static u32 ibmvnic_get_link(struct net_device *netdev)
2319 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2321 /* Don't need to send a query because we request a logical link up at
2322 * init and then we wait for link state indications
2324 return adapter->logical_link_state;
2327 static void ibmvnic_get_ringparam(struct net_device *netdev,
2328 struct ethtool_ringparam *ring)
2330 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2332 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2333 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2334 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2336 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2337 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2339 ring->rx_mini_max_pending = 0;
2340 ring->rx_jumbo_max_pending = 0;
2341 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2342 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2343 ring->rx_mini_pending = 0;
2344 ring->rx_jumbo_pending = 0;
2347 static int ibmvnic_set_ringparam(struct net_device *netdev,
2348 struct ethtool_ringparam *ring)
2350 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2354 adapter->desired.rx_entries = ring->rx_pending;
2355 adapter->desired.tx_entries = ring->tx_pending;
2357 ret = wait_for_reset(adapter);
2360 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2361 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2363 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2364 ring->rx_pending, ring->tx_pending,
2365 adapter->req_rx_add_entries_per_subcrq,
2366 adapter->req_tx_entries_per_subcrq);
2370 static void ibmvnic_get_channels(struct net_device *netdev,
2371 struct ethtool_channels *channels)
2373 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2375 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2376 channels->max_rx = adapter->max_rx_queues;
2377 channels->max_tx = adapter->max_tx_queues;
2379 channels->max_rx = IBMVNIC_MAX_QUEUES;
2380 channels->max_tx = IBMVNIC_MAX_QUEUES;
2383 channels->max_other = 0;
2384 channels->max_combined = 0;
2385 channels->rx_count = adapter->req_rx_queues;
2386 channels->tx_count = adapter->req_tx_queues;
2387 channels->other_count = 0;
2388 channels->combined_count = 0;
2391 static int ibmvnic_set_channels(struct net_device *netdev,
2392 struct ethtool_channels *channels)
2394 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2398 adapter->desired.rx_queues = channels->rx_count;
2399 adapter->desired.tx_queues = channels->tx_count;
2401 ret = wait_for_reset(adapter);
2404 (adapter->req_rx_queues != channels->rx_count ||
2405 adapter->req_tx_queues != channels->tx_count))
2407 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2408 channels->rx_count, channels->tx_count,
2409 adapter->req_rx_queues, adapter->req_tx_queues);
2414 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2416 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2419 switch (stringset) {
2421 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2422 i++, data += ETH_GSTRING_LEN)
2423 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2425 for (i = 0; i < adapter->req_tx_queues; i++) {
2426 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2427 data += ETH_GSTRING_LEN;
2429 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2430 data += ETH_GSTRING_LEN;
2432 snprintf(data, ETH_GSTRING_LEN,
2433 "tx%d_dropped_packets", i);
2434 data += ETH_GSTRING_LEN;
2437 for (i = 0; i < adapter->req_rx_queues; i++) {
2438 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2439 data += ETH_GSTRING_LEN;
2441 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2442 data += ETH_GSTRING_LEN;
2444 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2445 data += ETH_GSTRING_LEN;
2449 case ETH_SS_PRIV_FLAGS:
2450 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2451 strcpy(data + i * ETH_GSTRING_LEN,
2452 ibmvnic_priv_flags[i]);
2459 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2461 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2465 return ARRAY_SIZE(ibmvnic_stats) +
2466 adapter->req_tx_queues * NUM_TX_STATS +
2467 adapter->req_rx_queues * NUM_RX_STATS;
2468 case ETH_SS_PRIV_FLAGS:
2469 return ARRAY_SIZE(ibmvnic_priv_flags);
2475 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2476 struct ethtool_stats *stats, u64 *data)
2478 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2479 union ibmvnic_crq crq;
2483 memset(&crq, 0, sizeof(crq));
2484 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2485 crq.request_statistics.cmd = REQUEST_STATISTICS;
2486 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2487 crq.request_statistics.len =
2488 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2490 /* Wait for data to be written */
2491 init_completion(&adapter->stats_done);
2492 rc = ibmvnic_send_crq(adapter, &crq);
2495 wait_for_completion(&adapter->stats_done);
2497 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2498 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2499 ibmvnic_stats[i].offset));
2501 for (j = 0; j < adapter->req_tx_queues; j++) {
2502 data[i] = adapter->tx_stats_buffers[j].packets;
2504 data[i] = adapter->tx_stats_buffers[j].bytes;
2506 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2510 for (j = 0; j < adapter->req_rx_queues; j++) {
2511 data[i] = adapter->rx_stats_buffers[j].packets;
2513 data[i] = adapter->rx_stats_buffers[j].bytes;
2515 data[i] = adapter->rx_stats_buffers[j].interrupts;
2520 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2522 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2524 return adapter->priv_flags;
2527 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2529 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2530 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2533 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2535 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2539 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2540 .get_drvinfo = ibmvnic_get_drvinfo,
2541 .get_msglevel = ibmvnic_get_msglevel,
2542 .set_msglevel = ibmvnic_set_msglevel,
2543 .get_link = ibmvnic_get_link,
2544 .get_ringparam = ibmvnic_get_ringparam,
2545 .set_ringparam = ibmvnic_set_ringparam,
2546 .get_channels = ibmvnic_get_channels,
2547 .set_channels = ibmvnic_set_channels,
2548 .get_strings = ibmvnic_get_strings,
2549 .get_sset_count = ibmvnic_get_sset_count,
2550 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2551 .get_link_ksettings = ibmvnic_get_link_ksettings,
2552 .get_priv_flags = ibmvnic_get_priv_flags,
2553 .set_priv_flags = ibmvnic_set_priv_flags,
2556 /* Routines for managing CRQs/sCRQs */
2558 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2559 struct ibmvnic_sub_crq_queue *scrq)
2564 free_irq(scrq->irq, scrq);
2565 irq_dispose_mapping(scrq->irq);
2569 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2570 atomic_set(&scrq->used, 0);
2573 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2574 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2578 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2582 for (i = 0; i < adapter->req_tx_queues; i++) {
2583 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2584 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2589 for (i = 0; i < adapter->req_rx_queues; i++) {
2590 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2591 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2599 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2600 struct ibmvnic_sub_crq_queue *scrq,
2603 struct device *dev = &adapter->vdev->dev;
2606 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2609 /* Close the sub-crqs */
2611 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2612 adapter->vdev->unit_address,
2614 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2617 netdev_err(adapter->netdev,
2618 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2623 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2625 free_pages((unsigned long)scrq->msgs, 2);
2629 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2632 struct device *dev = &adapter->vdev->dev;
2633 struct ibmvnic_sub_crq_queue *scrq;
2636 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2641 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2643 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2644 goto zero_page_failed;
2647 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2649 if (dma_mapping_error(dev, scrq->msg_token)) {
2650 dev_warn(dev, "Couldn't map crq queue messages page\n");
2654 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2655 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2657 if (rc == H_RESOURCE)
2658 rc = ibmvnic_reset_crq(adapter);
2660 if (rc == H_CLOSED) {
2661 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2663 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2667 scrq->adapter = adapter;
2668 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2669 spin_lock_init(&scrq->lock);
2671 netdev_dbg(adapter->netdev,
2672 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2673 scrq->crq_num, scrq->hw_irq, scrq->irq);
2678 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2681 free_pages((unsigned long)scrq->msgs, 2);
2688 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2692 if (adapter->tx_scrq) {
2693 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2694 if (!adapter->tx_scrq[i])
2697 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2699 if (adapter->tx_scrq[i]->irq) {
2700 free_irq(adapter->tx_scrq[i]->irq,
2701 adapter->tx_scrq[i]);
2702 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2703 adapter->tx_scrq[i]->irq = 0;
2706 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2710 kfree(adapter->tx_scrq);
2711 adapter->tx_scrq = NULL;
2712 adapter->num_active_tx_scrqs = 0;
2715 if (adapter->rx_scrq) {
2716 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2717 if (!adapter->rx_scrq[i])
2720 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2722 if (adapter->rx_scrq[i]->irq) {
2723 free_irq(adapter->rx_scrq[i]->irq,
2724 adapter->rx_scrq[i]);
2725 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2726 adapter->rx_scrq[i]->irq = 0;
2729 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2733 kfree(adapter->rx_scrq);
2734 adapter->rx_scrq = NULL;
2735 adapter->num_active_rx_scrqs = 0;
2739 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2740 struct ibmvnic_sub_crq_queue *scrq)
2742 struct device *dev = &adapter->vdev->dev;
2745 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2746 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2748 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2753 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2754 struct ibmvnic_sub_crq_queue *scrq)
2756 struct device *dev = &adapter->vdev->dev;
2759 if (scrq->hw_irq > 0x100000000ULL) {
2760 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2764 if (adapter->resetting &&
2765 adapter->reset_reason == VNIC_RESET_MOBILITY) {
2766 u64 val = (0xff000000) | scrq->hw_irq;
2768 rc = plpar_hcall_norets(H_EOI, val);
2770 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2774 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2775 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2777 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2782 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2783 struct ibmvnic_sub_crq_queue *scrq)
2785 struct device *dev = &adapter->vdev->dev;
2786 struct ibmvnic_tx_pool *tx_pool;
2787 struct ibmvnic_tx_buff *txbuff;
2788 union sub_crq *next;
2794 while (pending_scrq(adapter, scrq)) {
2795 unsigned int pool = scrq->pool_index;
2796 int num_entries = 0;
2798 next = ibmvnic_next_scrq(adapter, scrq);
2799 for (i = 0; i < next->tx_comp.num_comps; i++) {
2800 if (next->tx_comp.rcs[i]) {
2801 dev_err(dev, "tx error %x\n",
2802 next->tx_comp.rcs[i]);
2805 index = be32_to_cpu(next->tx_comp.correlators[i]);
2806 if (index & IBMVNIC_TSO_POOL_MASK) {
2807 tx_pool = &adapter->tso_pool[pool];
2808 index &= ~IBMVNIC_TSO_POOL_MASK;
2810 tx_pool = &adapter->tx_pool[pool];
2813 txbuff = &tx_pool->tx_buff[index];
2815 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2816 if (!txbuff->data_dma[j])
2819 txbuff->data_dma[j] = 0;
2821 /* if sub_crq was sent indirectly */
2822 first = &txbuff->indir_arr[0].generic.first;
2823 if (*first == IBMVNIC_CRQ_CMD) {
2824 dma_unmap_single(dev, txbuff->indir_dma,
2825 sizeof(txbuff->indir_arr),
2830 if (txbuff->last_frag) {
2831 dev_kfree_skb_any(txbuff->skb);
2835 num_entries += txbuff->num_entries;
2837 tx_pool->free_map[tx_pool->producer_index] = index;
2838 tx_pool->producer_index =
2839 (tx_pool->producer_index + 1) %
2840 tx_pool->num_buffers;
2842 /* remove tx_comp scrq*/
2843 next->tx_comp.first = 0;
2845 if (atomic_sub_return(num_entries, &scrq->used) <=
2846 (adapter->req_tx_entries_per_subcrq / 2) &&
2847 __netif_subqueue_stopped(adapter->netdev,
2848 scrq->pool_index)) {
2849 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2850 netdev_dbg(adapter->netdev, "Started queue %d\n",
2855 enable_scrq_irq(adapter, scrq);
2857 if (pending_scrq(adapter, scrq)) {
2858 disable_scrq_irq(adapter, scrq);
2865 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2867 struct ibmvnic_sub_crq_queue *scrq = instance;
2868 struct ibmvnic_adapter *adapter = scrq->adapter;
2870 disable_scrq_irq(adapter, scrq);
2871 ibmvnic_complete_tx(adapter, scrq);
2876 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2878 struct ibmvnic_sub_crq_queue *scrq = instance;
2879 struct ibmvnic_adapter *adapter = scrq->adapter;
2881 /* When booting a kdump kernel we can hit pending interrupts
2882 * prior to completing driver initialization.
2884 if (unlikely(adapter->state != VNIC_OPEN))
2887 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2889 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2890 disable_scrq_irq(adapter, scrq);
2891 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2897 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2899 struct device *dev = &adapter->vdev->dev;
2900 struct ibmvnic_sub_crq_queue *scrq;
2904 for (i = 0; i < adapter->req_tx_queues; i++) {
2905 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2907 scrq = adapter->tx_scrq[i];
2908 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2912 dev_err(dev, "Error mapping irq\n");
2913 goto req_tx_irq_failed;
2916 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
2917 adapter->vdev->unit_address, i);
2918 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2919 0, scrq->name, scrq);
2922 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2924 irq_dispose_mapping(scrq->irq);
2925 goto req_tx_irq_failed;
2929 for (i = 0; i < adapter->req_rx_queues; i++) {
2930 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2932 scrq = adapter->rx_scrq[i];
2933 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2936 dev_err(dev, "Error mapping irq\n");
2937 goto req_rx_irq_failed;
2939 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
2940 adapter->vdev->unit_address, i);
2941 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2942 0, scrq->name, scrq);
2944 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2946 irq_dispose_mapping(scrq->irq);
2947 goto req_rx_irq_failed;
2953 for (j = 0; j < i; j++) {
2954 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2955 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2957 i = adapter->req_tx_queues;
2959 for (j = 0; j < i; j++) {
2960 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2961 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2963 release_sub_crqs(adapter, 1);
2967 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2969 struct device *dev = &adapter->vdev->dev;
2970 struct ibmvnic_sub_crq_queue **allqueues;
2971 int registered_queues = 0;
2976 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2978 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2982 for (i = 0; i < total_queues; i++) {
2983 allqueues[i] = init_sub_crq_queue(adapter);
2984 if (!allqueues[i]) {
2985 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2988 registered_queues++;
2991 /* Make sure we were able to register the minimum number of queues */
2992 if (registered_queues <
2993 adapter->min_tx_queues + adapter->min_rx_queues) {
2994 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2998 /* Distribute the failed allocated queues*/
2999 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3000 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3003 if (adapter->req_rx_queues > adapter->min_rx_queues)
3004 adapter->req_rx_queues--;
3009 if (adapter->req_tx_queues > adapter->min_tx_queues)
3010 adapter->req_tx_queues--;
3017 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3018 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3019 if (!adapter->tx_scrq)
3022 for (i = 0; i < adapter->req_tx_queues; i++) {
3023 adapter->tx_scrq[i] = allqueues[i];
3024 adapter->tx_scrq[i]->pool_index = i;
3025 adapter->num_active_tx_scrqs++;
3028 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3029 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3030 if (!adapter->rx_scrq)
3033 for (i = 0; i < adapter->req_rx_queues; i++) {
3034 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3035 adapter->rx_scrq[i]->scrq_num = i;
3036 adapter->num_active_rx_scrqs++;
3043 kfree(adapter->tx_scrq);
3044 adapter->tx_scrq = NULL;
3046 for (i = 0; i < registered_queues; i++)
3047 release_sub_crq_queue(adapter, allqueues[i], 1);
3052 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3054 struct device *dev = &adapter->vdev->dev;
3055 union ibmvnic_crq crq;
3059 /* Sub-CRQ entries are 32 byte long */
3060 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3062 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3063 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3064 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3068 if (adapter->desired.mtu)
3069 adapter->req_mtu = adapter->desired.mtu;
3071 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3073 if (!adapter->desired.tx_entries)
3074 adapter->desired.tx_entries =
3075 adapter->max_tx_entries_per_subcrq;
3076 if (!adapter->desired.rx_entries)
3077 adapter->desired.rx_entries =
3078 adapter->max_rx_add_entries_per_subcrq;
3080 max_entries = IBMVNIC_MAX_LTB_SIZE /
3081 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3083 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3084 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3085 adapter->desired.tx_entries = max_entries;
3088 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3089 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3090 adapter->desired.rx_entries = max_entries;
3093 if (adapter->desired.tx_entries)
3094 adapter->req_tx_entries_per_subcrq =
3095 adapter->desired.tx_entries;
3097 adapter->req_tx_entries_per_subcrq =
3098 adapter->max_tx_entries_per_subcrq;
3100 if (adapter->desired.rx_entries)
3101 adapter->req_rx_add_entries_per_subcrq =
3102 adapter->desired.rx_entries;
3104 adapter->req_rx_add_entries_per_subcrq =
3105 adapter->max_rx_add_entries_per_subcrq;
3107 if (adapter->desired.tx_queues)
3108 adapter->req_tx_queues =
3109 adapter->desired.tx_queues;
3111 adapter->req_tx_queues =
3112 adapter->opt_tx_comp_sub_queues;
3114 if (adapter->desired.rx_queues)
3115 adapter->req_rx_queues =
3116 adapter->desired.rx_queues;
3118 adapter->req_rx_queues =
3119 adapter->opt_rx_comp_queues;
3121 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3124 memset(&crq, 0, sizeof(crq));
3125 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3126 crq.request_capability.cmd = REQUEST_CAPABILITY;
3128 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3129 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3130 atomic_inc(&adapter->running_cap_crqs);
3131 ibmvnic_send_crq(adapter, &crq);
3133 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3134 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3135 atomic_inc(&adapter->running_cap_crqs);
3136 ibmvnic_send_crq(adapter, &crq);
3138 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3139 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3140 atomic_inc(&adapter->running_cap_crqs);
3141 ibmvnic_send_crq(adapter, &crq);
3143 crq.request_capability.capability =
3144 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3145 crq.request_capability.number =
3146 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3147 atomic_inc(&adapter->running_cap_crqs);
3148 ibmvnic_send_crq(adapter, &crq);
3150 crq.request_capability.capability =
3151 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3152 crq.request_capability.number =
3153 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3154 atomic_inc(&adapter->running_cap_crqs);
3155 ibmvnic_send_crq(adapter, &crq);
3157 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3158 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3159 atomic_inc(&adapter->running_cap_crqs);
3160 ibmvnic_send_crq(adapter, &crq);
3162 if (adapter->netdev->flags & IFF_PROMISC) {
3163 if (adapter->promisc_supported) {
3164 crq.request_capability.capability =
3165 cpu_to_be16(PROMISC_REQUESTED);
3166 crq.request_capability.number = cpu_to_be64(1);
3167 atomic_inc(&adapter->running_cap_crqs);
3168 ibmvnic_send_crq(adapter, &crq);
3171 crq.request_capability.capability =
3172 cpu_to_be16(PROMISC_REQUESTED);
3173 crq.request_capability.number = cpu_to_be64(0);
3174 atomic_inc(&adapter->running_cap_crqs);
3175 ibmvnic_send_crq(adapter, &crq);
3179 static int pending_scrq(struct ibmvnic_adapter *adapter,
3180 struct ibmvnic_sub_crq_queue *scrq)
3182 union sub_crq *entry = &scrq->msgs[scrq->cur];
3184 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3190 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3191 struct ibmvnic_sub_crq_queue *scrq)
3193 union sub_crq *entry;
3194 unsigned long flags;
3196 spin_lock_irqsave(&scrq->lock, flags);
3197 entry = &scrq->msgs[scrq->cur];
3198 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3199 if (++scrq->cur == scrq->size)
3204 spin_unlock_irqrestore(&scrq->lock, flags);
3209 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3211 struct ibmvnic_crq_queue *queue = &adapter->crq;
3212 union ibmvnic_crq *crq;
3214 crq = &queue->msgs[queue->cur];
3215 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3216 if (++queue->cur == queue->size)
3225 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3229 dev_warn_ratelimited(dev,
3230 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3234 dev_warn_ratelimited(dev,
3235 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3239 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3244 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3245 union sub_crq *sub_crq)
3247 unsigned int ua = adapter->vdev->unit_address;
3248 struct device *dev = &adapter->vdev->dev;
3249 u64 *u64_crq = (u64 *)sub_crq;
3252 netdev_dbg(adapter->netdev,
3253 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3254 (unsigned long int)cpu_to_be64(remote_handle),
3255 (unsigned long int)cpu_to_be64(u64_crq[0]),
3256 (unsigned long int)cpu_to_be64(u64_crq[1]),
3257 (unsigned long int)cpu_to_be64(u64_crq[2]),
3258 (unsigned long int)cpu_to_be64(u64_crq[3]));
3260 /* Make sure the hypervisor sees the complete request */
3263 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3264 cpu_to_be64(remote_handle),
3265 cpu_to_be64(u64_crq[0]),
3266 cpu_to_be64(u64_crq[1]),
3267 cpu_to_be64(u64_crq[2]),
3268 cpu_to_be64(u64_crq[3]));
3271 print_subcrq_error(dev, rc, __func__);
3276 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3277 u64 remote_handle, u64 ioba, u64 num_entries)
3279 unsigned int ua = adapter->vdev->unit_address;
3280 struct device *dev = &adapter->vdev->dev;
3283 /* Make sure the hypervisor sees the complete request */
3285 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3286 cpu_to_be64(remote_handle),
3290 print_subcrq_error(dev, rc, __func__);
3295 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3296 union ibmvnic_crq *crq)
3298 unsigned int ua = adapter->vdev->unit_address;
3299 struct device *dev = &adapter->vdev->dev;
3300 u64 *u64_crq = (u64 *)crq;
3303 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3304 (unsigned long int)cpu_to_be64(u64_crq[0]),
3305 (unsigned long int)cpu_to_be64(u64_crq[1]));
3307 if (!adapter->crq.active &&
3308 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3309 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3313 /* Make sure the hypervisor sees the complete request */
3316 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3317 cpu_to_be64(u64_crq[0]),
3318 cpu_to_be64(u64_crq[1]));
3321 if (rc == H_CLOSED) {
3322 dev_warn(dev, "CRQ Queue closed\n");
3323 if (adapter->resetting)
3324 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3327 dev_warn(dev, "Send error (rc=%d)\n", rc);
3333 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3335 union ibmvnic_crq crq;
3337 memset(&crq, 0, sizeof(crq));
3338 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3339 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3340 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3342 return ibmvnic_send_crq(adapter, &crq);
3345 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3347 union ibmvnic_crq crq;
3349 memset(&crq, 0, sizeof(crq));
3350 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3351 crq.version_exchange.cmd = VERSION_EXCHANGE;
3352 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3354 return ibmvnic_send_crq(adapter, &crq);
3357 struct vnic_login_client_data {
3363 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3367 /* Calculate the amount of buffer space needed for the
3368 * vnic client data in the login buffer. There are four entries,
3369 * OS name, LPAR name, device name, and a null last entry.
3371 len = 4 * sizeof(struct vnic_login_client_data);
3372 len += 6; /* "Linux" plus NULL */
3373 len += strlen(utsname()->nodename) + 1;
3374 len += strlen(adapter->netdev->name) + 1;
3379 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3380 struct vnic_login_client_data *vlcd)
3382 const char *os_name = "Linux";
3385 /* Type 1 - LPAR OS */
3387 len = strlen(os_name) + 1;
3388 vlcd->len = cpu_to_be16(len);
3389 strncpy(vlcd->name, os_name, len);
3390 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3392 /* Type 2 - LPAR name */
3394 len = strlen(utsname()->nodename) + 1;
3395 vlcd->len = cpu_to_be16(len);
3396 strncpy(vlcd->name, utsname()->nodename, len);
3397 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3399 /* Type 3 - device name */
3401 len = strlen(adapter->netdev->name) + 1;
3402 vlcd->len = cpu_to_be16(len);
3403 strncpy(vlcd->name, adapter->netdev->name, len);
3406 static int send_login(struct ibmvnic_adapter *adapter)
3408 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3409 struct ibmvnic_login_buffer *login_buffer;
3410 struct device *dev = &adapter->vdev->dev;
3411 dma_addr_t rsp_buffer_token;
3412 dma_addr_t buffer_token;
3413 size_t rsp_buffer_size;
3414 union ibmvnic_crq crq;
3418 int client_data_len;
3419 struct vnic_login_client_data *vlcd;
3422 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3423 netdev_err(adapter->netdev,
3424 "RX or TX queues are not allocated, device login failed\n");
3428 release_login_rsp_buffer(adapter);
3429 client_data_len = vnic_client_data_len(adapter);
3432 sizeof(struct ibmvnic_login_buffer) +
3433 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3436 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3438 goto buf_alloc_failed;
3440 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3442 if (dma_mapping_error(dev, buffer_token)) {
3443 dev_err(dev, "Couldn't map login buffer\n");
3444 goto buf_map_failed;
3447 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3448 sizeof(u64) * adapter->req_tx_queues +
3449 sizeof(u64) * adapter->req_rx_queues +
3450 sizeof(u64) * adapter->req_rx_queues +
3451 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3453 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3454 if (!login_rsp_buffer)
3455 goto buf_rsp_alloc_failed;
3457 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3458 rsp_buffer_size, DMA_FROM_DEVICE);
3459 if (dma_mapping_error(dev, rsp_buffer_token)) {
3460 dev_err(dev, "Couldn't map login rsp buffer\n");
3461 goto buf_rsp_map_failed;
3464 adapter->login_buf = login_buffer;
3465 adapter->login_buf_token = buffer_token;
3466 adapter->login_buf_sz = buffer_size;
3467 adapter->login_rsp_buf = login_rsp_buffer;
3468 adapter->login_rsp_buf_token = rsp_buffer_token;
3469 adapter->login_rsp_buf_sz = rsp_buffer_size;
3471 login_buffer->len = cpu_to_be32(buffer_size);
3472 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3473 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3474 login_buffer->off_txcomp_subcrqs =
3475 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3476 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3477 login_buffer->off_rxcomp_subcrqs =
3478 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3479 sizeof(u64) * adapter->req_tx_queues);
3480 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3481 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3483 tx_list_p = (__be64 *)((char *)login_buffer +
3484 sizeof(struct ibmvnic_login_buffer));
3485 rx_list_p = (__be64 *)((char *)login_buffer +
3486 sizeof(struct ibmvnic_login_buffer) +
3487 sizeof(u64) * adapter->req_tx_queues);
3489 for (i = 0; i < adapter->req_tx_queues; i++) {
3490 if (adapter->tx_scrq[i]) {
3491 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3496 for (i = 0; i < adapter->req_rx_queues; i++) {
3497 if (adapter->rx_scrq[i]) {
3498 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3503 /* Insert vNIC login client data */
3504 vlcd = (struct vnic_login_client_data *)
3505 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3506 login_buffer->client_data_offset =
3507 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3508 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3510 vnic_add_client_data(adapter, vlcd);
3512 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3513 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3514 netdev_dbg(adapter->netdev, "%016lx\n",
3515 ((unsigned long int *)(adapter->login_buf))[i]);
3518 memset(&crq, 0, sizeof(crq));
3519 crq.login.first = IBMVNIC_CRQ_CMD;
3520 crq.login.cmd = LOGIN;
3521 crq.login.ioba = cpu_to_be32(buffer_token);
3522 crq.login.len = cpu_to_be32(buffer_size);
3523 ibmvnic_send_crq(adapter, &crq);
3528 kfree(login_rsp_buffer);
3529 buf_rsp_alloc_failed:
3530 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3532 kfree(login_buffer);
3537 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3540 union ibmvnic_crq crq;
3542 memset(&crq, 0, sizeof(crq));
3543 crq.request_map.first = IBMVNIC_CRQ_CMD;
3544 crq.request_map.cmd = REQUEST_MAP;
3545 crq.request_map.map_id = map_id;
3546 crq.request_map.ioba = cpu_to_be32(addr);
3547 crq.request_map.len = cpu_to_be32(len);
3548 return ibmvnic_send_crq(adapter, &crq);
3551 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3553 union ibmvnic_crq crq;
3555 memset(&crq, 0, sizeof(crq));
3556 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3557 crq.request_unmap.cmd = REQUEST_UNMAP;
3558 crq.request_unmap.map_id = map_id;
3559 return ibmvnic_send_crq(adapter, &crq);
3562 static void send_map_query(struct ibmvnic_adapter *adapter)
3564 union ibmvnic_crq crq;
3566 memset(&crq, 0, sizeof(crq));
3567 crq.query_map.first = IBMVNIC_CRQ_CMD;
3568 crq.query_map.cmd = QUERY_MAP;
3569 ibmvnic_send_crq(adapter, &crq);
3572 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3573 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3575 union ibmvnic_crq crq;
3577 atomic_set(&adapter->running_cap_crqs, 0);
3578 memset(&crq, 0, sizeof(crq));
3579 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3580 crq.query_capability.cmd = QUERY_CAPABILITY;
3582 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3583 atomic_inc(&adapter->running_cap_crqs);
3584 ibmvnic_send_crq(adapter, &crq);
3586 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3587 atomic_inc(&adapter->running_cap_crqs);
3588 ibmvnic_send_crq(adapter, &crq);
3590 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3591 atomic_inc(&adapter->running_cap_crqs);
3592 ibmvnic_send_crq(adapter, &crq);
3594 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3595 atomic_inc(&adapter->running_cap_crqs);
3596 ibmvnic_send_crq(adapter, &crq);
3598 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3599 atomic_inc(&adapter->running_cap_crqs);
3600 ibmvnic_send_crq(adapter, &crq);
3602 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3603 atomic_inc(&adapter->running_cap_crqs);
3604 ibmvnic_send_crq(adapter, &crq);
3606 crq.query_capability.capability =
3607 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3608 atomic_inc(&adapter->running_cap_crqs);
3609 ibmvnic_send_crq(adapter, &crq);
3611 crq.query_capability.capability =
3612 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3613 atomic_inc(&adapter->running_cap_crqs);
3614 ibmvnic_send_crq(adapter, &crq);
3616 crq.query_capability.capability =
3617 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3618 atomic_inc(&adapter->running_cap_crqs);
3619 ibmvnic_send_crq(adapter, &crq);
3621 crq.query_capability.capability =
3622 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3623 atomic_inc(&adapter->running_cap_crqs);
3624 ibmvnic_send_crq(adapter, &crq);
3626 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3627 atomic_inc(&adapter->running_cap_crqs);
3628 ibmvnic_send_crq(adapter, &crq);
3630 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3631 atomic_inc(&adapter->running_cap_crqs);
3632 ibmvnic_send_crq(adapter, &crq);
3634 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3635 atomic_inc(&adapter->running_cap_crqs);
3636 ibmvnic_send_crq(adapter, &crq);
3638 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3639 atomic_inc(&adapter->running_cap_crqs);
3640 ibmvnic_send_crq(adapter, &crq);
3642 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3643 atomic_inc(&adapter->running_cap_crqs);
3644 ibmvnic_send_crq(adapter, &crq);
3646 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3647 atomic_inc(&adapter->running_cap_crqs);
3648 ibmvnic_send_crq(adapter, &crq);
3650 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3651 atomic_inc(&adapter->running_cap_crqs);
3652 ibmvnic_send_crq(adapter, &crq);
3654 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3655 atomic_inc(&adapter->running_cap_crqs);
3656 ibmvnic_send_crq(adapter, &crq);
3658 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3659 atomic_inc(&adapter->running_cap_crqs);
3660 ibmvnic_send_crq(adapter, &crq);
3662 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3663 atomic_inc(&adapter->running_cap_crqs);
3664 ibmvnic_send_crq(adapter, &crq);
3666 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3667 atomic_inc(&adapter->running_cap_crqs);
3668 ibmvnic_send_crq(adapter, &crq);
3670 crq.query_capability.capability =
3671 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3672 atomic_inc(&adapter->running_cap_crqs);
3673 ibmvnic_send_crq(adapter, &crq);
3675 crq.query_capability.capability =
3676 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3677 atomic_inc(&adapter->running_cap_crqs);
3678 ibmvnic_send_crq(adapter, &crq);
3680 crq.query_capability.capability =
3681 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3682 atomic_inc(&adapter->running_cap_crqs);
3683 ibmvnic_send_crq(adapter, &crq);
3685 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3686 atomic_inc(&adapter->running_cap_crqs);
3687 ibmvnic_send_crq(adapter, &crq);
3690 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3691 struct ibmvnic_adapter *adapter)
3693 struct device *dev = &adapter->vdev->dev;
3695 if (crq->get_vpd_size_rsp.rc.code) {
3696 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3697 crq->get_vpd_size_rsp.rc.code);
3698 complete(&adapter->fw_done);
3702 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3703 complete(&adapter->fw_done);
3706 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3707 struct ibmvnic_adapter *adapter)
3709 struct device *dev = &adapter->vdev->dev;
3710 unsigned char *substr = NULL;
3711 u8 fw_level_len = 0;
3713 memset(adapter->fw_version, 0, 32);
3715 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3718 if (crq->get_vpd_rsp.rc.code) {
3719 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3720 crq->get_vpd_rsp.rc.code);
3724 /* get the position of the firmware version info
3725 * located after the ASCII 'RM' substring in the buffer
3727 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3729 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3733 /* get length of firmware level ASCII substring */
3734 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3735 fw_level_len = *(substr + 2);
3737 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3741 /* copy firmware version string from vpd into adapter */
3742 if ((substr + 3 + fw_level_len) <
3743 (adapter->vpd->buff + adapter->vpd->len)) {
3744 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3746 dev_info(dev, "FW substr extrapolated VPD buff\n");
3750 if (adapter->fw_version[0] == '\0')
3751 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3752 complete(&adapter->fw_done);
3755 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3757 struct device *dev = &adapter->vdev->dev;
3758 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3759 netdev_features_t old_hw_features = 0;
3760 union ibmvnic_crq crq;
3763 dma_unmap_single(dev, adapter->ip_offload_tok,
3764 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3766 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3767 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3768 netdev_dbg(adapter->netdev, "%016lx\n",
3769 ((unsigned long int *)(buf))[i]);
3771 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3772 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3773 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3774 buf->tcp_ipv4_chksum);
3775 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3776 buf->tcp_ipv6_chksum);
3777 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3778 buf->udp_ipv4_chksum);
3779 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3780 buf->udp_ipv6_chksum);
3781 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3782 buf->large_tx_ipv4);
3783 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3784 buf->large_tx_ipv6);
3785 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3786 buf->large_rx_ipv4);
3787 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3788 buf->large_rx_ipv6);
3789 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3790 buf->max_ipv4_header_size);
3791 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3792 buf->max_ipv6_header_size);
3793 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3794 buf->max_tcp_header_size);
3795 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3796 buf->max_udp_header_size);
3797 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3798 buf->max_large_tx_size);
3799 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3800 buf->max_large_rx_size);
3801 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3802 buf->ipv6_extension_header);
3803 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3804 buf->tcp_pseudosum_req);
3805 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3806 buf->num_ipv6_ext_headers);
3807 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3808 buf->off_ipv6_ext_headers);
3810 adapter->ip_offload_ctrl_tok =
3811 dma_map_single(dev, &adapter->ip_offload_ctrl,
3812 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3814 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3815 dev_err(dev, "Couldn't map ip offload control buffer\n");
3819 adapter->ip_offload_ctrl.len =
3820 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3821 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3822 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3823 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3824 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3825 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3826 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3827 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3828 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3829 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3831 /* large_rx disabled for now, additional features needed */
3832 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3833 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3835 if (adapter->state != VNIC_PROBING) {
3836 old_hw_features = adapter->netdev->hw_features;
3837 adapter->netdev->hw_features = 0;
3840 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
3842 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3843 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
3845 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3846 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
3848 if ((adapter->netdev->features &
3849 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3850 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
3852 if (buf->large_tx_ipv4)
3853 adapter->netdev->hw_features |= NETIF_F_TSO;
3854 if (buf->large_tx_ipv6)
3855 adapter->netdev->hw_features |= NETIF_F_TSO6;
3857 if (adapter->state == VNIC_PROBING) {
3858 adapter->netdev->features |= adapter->netdev->hw_features;
3859 } else if (old_hw_features != adapter->netdev->hw_features) {
3860 netdev_features_t tmp = 0;
3862 /* disable features no longer supported */
3863 adapter->netdev->features &= adapter->netdev->hw_features;
3864 /* turn on features now supported if previously enabled */
3865 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
3866 adapter->netdev->hw_features;
3867 adapter->netdev->features |=
3868 tmp & adapter->netdev->wanted_features;
3871 memset(&crq, 0, sizeof(crq));
3872 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3873 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3874 crq.control_ip_offload.len =
3875 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3876 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3877 ibmvnic_send_crq(adapter, &crq);
3880 static const char *ibmvnic_fw_err_cause(u16 cause)
3883 case ADAPTER_PROBLEM:
3884 return "adapter problem";
3886 return "bus problem";
3888 return "firmware problem";
3890 return "device driver problem";
3892 return "EEH recovery";
3894 return "firmware updated";
3896 return "low Memory";
3902 static void handle_error_indication(union ibmvnic_crq *crq,
3903 struct ibmvnic_adapter *adapter)
3905 struct device *dev = &adapter->vdev->dev;
3908 cause = be16_to_cpu(crq->error_indication.error_cause);
3910 dev_warn_ratelimited(dev,
3911 "Firmware reports %serror, cause: %s. Starting recovery...\n",
3912 crq->error_indication.flags
3913 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3914 ibmvnic_fw_err_cause(cause));
3916 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3917 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3919 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3922 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3923 struct ibmvnic_adapter *adapter)
3925 struct net_device *netdev = adapter->netdev;
3926 struct device *dev = &adapter->vdev->dev;
3929 rc = crq->change_mac_addr_rsp.rc.code;
3931 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3934 ether_addr_copy(netdev->dev_addr,
3935 &crq->change_mac_addr_rsp.mac_addr[0]);
3937 complete(&adapter->fw_done);
3941 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3942 struct ibmvnic_adapter *adapter)
3944 struct device *dev = &adapter->vdev->dev;
3948 atomic_dec(&adapter->running_cap_crqs);
3949 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3951 req_value = &adapter->req_tx_queues;
3955 req_value = &adapter->req_rx_queues;
3958 case REQ_RX_ADD_QUEUES:
3959 req_value = &adapter->req_rx_add_queues;
3962 case REQ_TX_ENTRIES_PER_SUBCRQ:
3963 req_value = &adapter->req_tx_entries_per_subcrq;
3964 name = "tx_entries_per_subcrq";
3966 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3967 req_value = &adapter->req_rx_add_entries_per_subcrq;
3968 name = "rx_add_entries_per_subcrq";
3971 req_value = &adapter->req_mtu;
3974 case PROMISC_REQUESTED:
3975 req_value = &adapter->promisc;
3979 dev_err(dev, "Got invalid cap request rsp %d\n",
3980 crq->request_capability.capability);
3984 switch (crq->request_capability_rsp.rc.code) {
3987 case PARTIALSUCCESS:
3988 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3990 (long int)be64_to_cpu(crq->request_capability_rsp.
3993 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3995 pr_err("mtu of %llu is not supported. Reverting.\n",
3997 *req_value = adapter->fallback.mtu;
4000 be64_to_cpu(crq->request_capability_rsp.number);
4003 ibmvnic_send_req_caps(adapter, 1);
4006 dev_err(dev, "Error %d in request cap rsp\n",
4007 crq->request_capability_rsp.rc.code);
4011 /* Done receiving requested capabilities, query IP offload support */
4012 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4013 union ibmvnic_crq newcrq;
4014 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4015 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4016 &adapter->ip_offload_buf;
4018 adapter->wait_capability = false;
4019 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4023 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4024 if (!firmware_has_feature(FW_FEATURE_CMO))
4025 dev_err(dev, "Couldn't map offload buffer\n");
4029 memset(&newcrq, 0, sizeof(newcrq));
4030 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4031 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4032 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4033 newcrq.query_ip_offload.ioba =
4034 cpu_to_be32(adapter->ip_offload_tok);
4036 ibmvnic_send_crq(adapter, &newcrq);
4040 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4041 struct ibmvnic_adapter *adapter)
4043 struct device *dev = &adapter->vdev->dev;
4044 struct net_device *netdev = adapter->netdev;
4045 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4046 struct ibmvnic_login_buffer *login = adapter->login_buf;
4049 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4051 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4052 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4054 /* If the number of queues requested can't be allocated by the
4055 * server, the login response will return with code 1. We will need
4056 * to resend the login buffer with fewer queues requested.
4058 if (login_rsp_crq->generic.rc.code) {
4059 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4060 complete(&adapter->init_done);
4064 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4066 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4067 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4068 netdev_dbg(adapter->netdev, "%016lx\n",
4069 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4073 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4074 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4075 adapter->req_rx_add_queues !=
4076 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4077 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4078 ibmvnic_remove(adapter->vdev);
4081 release_login_buffer(adapter);
4082 complete(&adapter->init_done);
4087 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4088 struct ibmvnic_adapter *adapter)
4090 struct device *dev = &adapter->vdev->dev;
4093 rc = crq->request_unmap_rsp.rc.code;
4095 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4098 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4099 struct ibmvnic_adapter *adapter)
4101 struct net_device *netdev = adapter->netdev;
4102 struct device *dev = &adapter->vdev->dev;
4105 rc = crq->query_map_rsp.rc.code;
4107 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4110 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4111 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4112 crq->query_map_rsp.free_pages);
4115 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4116 struct ibmvnic_adapter *adapter)
4118 struct net_device *netdev = adapter->netdev;
4119 struct device *dev = &adapter->vdev->dev;
4122 atomic_dec(&adapter->running_cap_crqs);
4123 netdev_dbg(netdev, "Outstanding queries: %d\n",
4124 atomic_read(&adapter->running_cap_crqs));
4125 rc = crq->query_capability.rc.code;
4127 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4131 switch (be16_to_cpu(crq->query_capability.capability)) {
4133 adapter->min_tx_queues =
4134 be64_to_cpu(crq->query_capability.number);
4135 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4136 adapter->min_tx_queues);
4139 adapter->min_rx_queues =
4140 be64_to_cpu(crq->query_capability.number);
4141 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4142 adapter->min_rx_queues);
4144 case MIN_RX_ADD_QUEUES:
4145 adapter->min_rx_add_queues =
4146 be64_to_cpu(crq->query_capability.number);
4147 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4148 adapter->min_rx_add_queues);
4151 adapter->max_tx_queues =
4152 be64_to_cpu(crq->query_capability.number);
4153 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4154 adapter->max_tx_queues);
4157 adapter->max_rx_queues =
4158 be64_to_cpu(crq->query_capability.number);
4159 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4160 adapter->max_rx_queues);
4162 case MAX_RX_ADD_QUEUES:
4163 adapter->max_rx_add_queues =
4164 be64_to_cpu(crq->query_capability.number);
4165 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4166 adapter->max_rx_add_queues);
4168 case MIN_TX_ENTRIES_PER_SUBCRQ:
4169 adapter->min_tx_entries_per_subcrq =
4170 be64_to_cpu(crq->query_capability.number);
4171 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4172 adapter->min_tx_entries_per_subcrq);
4174 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4175 adapter->min_rx_add_entries_per_subcrq =
4176 be64_to_cpu(crq->query_capability.number);
4177 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4178 adapter->min_rx_add_entries_per_subcrq);
4180 case MAX_TX_ENTRIES_PER_SUBCRQ:
4181 adapter->max_tx_entries_per_subcrq =
4182 be64_to_cpu(crq->query_capability.number);
4183 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4184 adapter->max_tx_entries_per_subcrq);
4186 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4187 adapter->max_rx_add_entries_per_subcrq =
4188 be64_to_cpu(crq->query_capability.number);
4189 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4190 adapter->max_rx_add_entries_per_subcrq);
4192 case TCP_IP_OFFLOAD:
4193 adapter->tcp_ip_offload =
4194 be64_to_cpu(crq->query_capability.number);
4195 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4196 adapter->tcp_ip_offload);
4198 case PROMISC_SUPPORTED:
4199 adapter->promisc_supported =
4200 be64_to_cpu(crq->query_capability.number);
4201 netdev_dbg(netdev, "promisc_supported = %lld\n",
4202 adapter->promisc_supported);
4205 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4206 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4207 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4210 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4211 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4212 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4214 case MAX_MULTICAST_FILTERS:
4215 adapter->max_multicast_filters =
4216 be64_to_cpu(crq->query_capability.number);
4217 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4218 adapter->max_multicast_filters);
4220 case VLAN_HEADER_INSERTION:
4221 adapter->vlan_header_insertion =
4222 be64_to_cpu(crq->query_capability.number);
4223 if (adapter->vlan_header_insertion)
4224 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4225 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4226 adapter->vlan_header_insertion);
4228 case RX_VLAN_HEADER_INSERTION:
4229 adapter->rx_vlan_header_insertion =
4230 be64_to_cpu(crq->query_capability.number);
4231 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4232 adapter->rx_vlan_header_insertion);
4234 case MAX_TX_SG_ENTRIES:
4235 adapter->max_tx_sg_entries =
4236 be64_to_cpu(crq->query_capability.number);
4237 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4238 adapter->max_tx_sg_entries);
4240 case RX_SG_SUPPORTED:
4241 adapter->rx_sg_supported =
4242 be64_to_cpu(crq->query_capability.number);
4243 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4244 adapter->rx_sg_supported);
4246 case OPT_TX_COMP_SUB_QUEUES:
4247 adapter->opt_tx_comp_sub_queues =
4248 be64_to_cpu(crq->query_capability.number);
4249 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4250 adapter->opt_tx_comp_sub_queues);
4252 case OPT_RX_COMP_QUEUES:
4253 adapter->opt_rx_comp_queues =
4254 be64_to_cpu(crq->query_capability.number);
4255 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4256 adapter->opt_rx_comp_queues);
4258 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4259 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4260 be64_to_cpu(crq->query_capability.number);
4261 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4262 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4264 case OPT_TX_ENTRIES_PER_SUBCRQ:
4265 adapter->opt_tx_entries_per_subcrq =
4266 be64_to_cpu(crq->query_capability.number);
4267 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4268 adapter->opt_tx_entries_per_subcrq);
4270 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4271 adapter->opt_rxba_entries_per_subcrq =
4272 be64_to_cpu(crq->query_capability.number);
4273 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4274 adapter->opt_rxba_entries_per_subcrq);
4276 case TX_RX_DESC_REQ:
4277 adapter->tx_rx_desc_req = crq->query_capability.number;
4278 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4279 adapter->tx_rx_desc_req);
4283 netdev_err(netdev, "Got invalid cap rsp %d\n",
4284 crq->query_capability.capability);
4288 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4289 adapter->wait_capability = false;
4290 ibmvnic_send_req_caps(adapter, 0);
4294 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4296 union ibmvnic_crq crq;
4299 memset(&crq, 0, sizeof(crq));
4300 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4301 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4302 init_completion(&adapter->fw_done);
4303 rc = ibmvnic_send_crq(adapter, &crq);
4306 wait_for_completion(&adapter->fw_done);
4307 return adapter->fw_done_rc ? -EIO : 0;
4310 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4311 struct ibmvnic_adapter *adapter)
4313 struct net_device *netdev = adapter->netdev;
4316 rc = crq->query_phys_parms_rsp.rc.code;
4318 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4321 switch (cpu_to_be32(crq->query_phys_parms_rsp.speed)) {
4322 case IBMVNIC_10MBPS:
4323 adapter->speed = SPEED_10;
4325 case IBMVNIC_100MBPS:
4326 adapter->speed = SPEED_100;
4329 adapter->speed = SPEED_1000;
4332 adapter->speed = SPEED_10000;
4334 case IBMVNIC_25GBPS:
4335 adapter->speed = SPEED_25000;
4337 case IBMVNIC_40GBPS:
4338 adapter->speed = SPEED_40000;
4340 case IBMVNIC_50GBPS:
4341 adapter->speed = SPEED_50000;
4343 case IBMVNIC_100GBPS:
4344 adapter->speed = SPEED_100000;
4347 netdev_warn(netdev, "Unknown speed 0x%08x\n",
4348 cpu_to_be32(crq->query_phys_parms_rsp.speed));
4349 adapter->speed = SPEED_UNKNOWN;
4351 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4352 adapter->duplex = DUPLEX_FULL;
4353 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4354 adapter->duplex = DUPLEX_HALF;
4356 adapter->duplex = DUPLEX_UNKNOWN;
4361 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4362 struct ibmvnic_adapter *adapter)
4364 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4365 struct net_device *netdev = adapter->netdev;
4366 struct device *dev = &adapter->vdev->dev;
4367 u64 *u64_crq = (u64 *)crq;
4370 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4371 (unsigned long int)cpu_to_be64(u64_crq[0]),
4372 (unsigned long int)cpu_to_be64(u64_crq[1]));
4373 switch (gen_crq->first) {
4374 case IBMVNIC_CRQ_INIT_RSP:
4375 switch (gen_crq->cmd) {
4376 case IBMVNIC_CRQ_INIT:
4377 dev_info(dev, "Partner initialized\n");
4378 adapter->from_passive_init = true;
4379 adapter->failover_pending = false;
4380 if (!completion_done(&adapter->init_done)) {
4381 complete(&adapter->init_done);
4382 adapter->init_done_rc = -EIO;
4384 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4386 case IBMVNIC_CRQ_INIT_COMPLETE:
4387 dev_info(dev, "Partner initialization complete\n");
4388 adapter->crq.active = true;
4389 send_version_xchg(adapter);
4392 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4395 case IBMVNIC_CRQ_XPORT_EVENT:
4396 netif_carrier_off(netdev);
4397 adapter->crq.active = false;
4398 if (adapter->resetting)
4399 adapter->force_reset_recovery = true;
4400 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4401 dev_info(dev, "Migrated, re-enabling adapter\n");
4402 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4403 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4404 dev_info(dev, "Backing device failover detected\n");
4405 adapter->failover_pending = true;
4407 /* The adapter lost the connection */
4408 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4410 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4413 case IBMVNIC_CRQ_CMD_RSP:
4416 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4421 switch (gen_crq->cmd) {
4422 case VERSION_EXCHANGE_RSP:
4423 rc = crq->version_exchange_rsp.rc.code;
4425 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4428 dev_info(dev, "Partner protocol version is %d\n",
4429 crq->version_exchange_rsp.version);
4430 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4433 be16_to_cpu(crq->version_exchange_rsp.version);
4434 send_cap_queries(adapter);
4436 case QUERY_CAPABILITY_RSP:
4437 handle_query_cap_rsp(crq, adapter);
4440 handle_query_map_rsp(crq, adapter);
4442 case REQUEST_MAP_RSP:
4443 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4444 complete(&adapter->fw_done);
4446 case REQUEST_UNMAP_RSP:
4447 handle_request_unmap_rsp(crq, adapter);
4449 case REQUEST_CAPABILITY_RSP:
4450 handle_request_cap_rsp(crq, adapter);
4453 netdev_dbg(netdev, "Got Login Response\n");
4454 handle_login_rsp(crq, adapter);
4456 case LOGICAL_LINK_STATE_RSP:
4458 "Got Logical Link State Response, state: %d rc: %d\n",
4459 crq->logical_link_state_rsp.link_state,
4460 crq->logical_link_state_rsp.rc.code);
4461 adapter->logical_link_state =
4462 crq->logical_link_state_rsp.link_state;
4463 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4464 complete(&adapter->init_done);
4466 case LINK_STATE_INDICATION:
4467 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4468 adapter->phys_link_state =
4469 crq->link_state_indication.phys_link_state;
4470 adapter->logical_link_state =
4471 crq->link_state_indication.logical_link_state;
4472 if (adapter->phys_link_state && adapter->logical_link_state)
4473 netif_carrier_on(netdev);
4475 netif_carrier_off(netdev);
4477 case CHANGE_MAC_ADDR_RSP:
4478 netdev_dbg(netdev, "Got MAC address change Response\n");
4479 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4481 case ERROR_INDICATION:
4482 netdev_dbg(netdev, "Got Error Indication\n");
4483 handle_error_indication(crq, adapter);
4485 case REQUEST_STATISTICS_RSP:
4486 netdev_dbg(netdev, "Got Statistics Response\n");
4487 complete(&adapter->stats_done);
4489 case QUERY_IP_OFFLOAD_RSP:
4490 netdev_dbg(netdev, "Got Query IP offload Response\n");
4491 handle_query_ip_offload_rsp(adapter);
4493 case MULTICAST_CTRL_RSP:
4494 netdev_dbg(netdev, "Got multicast control Response\n");
4496 case CONTROL_IP_OFFLOAD_RSP:
4497 netdev_dbg(netdev, "Got Control IP offload Response\n");
4498 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4499 sizeof(adapter->ip_offload_ctrl),
4501 complete(&adapter->init_done);
4503 case COLLECT_FW_TRACE_RSP:
4504 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4505 complete(&adapter->fw_done);
4507 case GET_VPD_SIZE_RSP:
4508 handle_vpd_size_rsp(crq, adapter);
4511 handle_vpd_rsp(crq, adapter);
4513 case QUERY_PHYS_PARMS_RSP:
4514 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
4515 complete(&adapter->fw_done);
4518 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4523 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4525 struct ibmvnic_adapter *adapter = instance;
4527 tasklet_schedule(&adapter->tasklet);
4531 static void ibmvnic_tasklet(void *data)
4533 struct ibmvnic_adapter *adapter = data;
4534 struct ibmvnic_crq_queue *queue = &adapter->crq;
4535 union ibmvnic_crq *crq;
4536 unsigned long flags;
4539 spin_lock_irqsave(&queue->lock, flags);
4541 /* Pull all the valid messages off the CRQ */
4542 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4543 ibmvnic_handle_crq(crq, adapter);
4544 crq->generic.first = 0;
4547 /* remain in tasklet until all
4548 * capabilities responses are received
4550 if (!adapter->wait_capability)
4553 /* if capabilities CRQ's were sent in this tasklet, the following
4554 * tasklet must wait until all responses are received
4556 if (atomic_read(&adapter->running_cap_crqs) != 0)
4557 adapter->wait_capability = true;
4558 spin_unlock_irqrestore(&queue->lock, flags);
4561 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4563 struct vio_dev *vdev = adapter->vdev;
4567 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4568 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4571 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4576 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4578 struct ibmvnic_crq_queue *crq = &adapter->crq;
4579 struct device *dev = &adapter->vdev->dev;
4580 struct vio_dev *vdev = adapter->vdev;
4585 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4586 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4588 /* Clean out the queue */
4589 memset(crq->msgs, 0, PAGE_SIZE);
4591 crq->active = false;
4593 /* And re-open it again */
4594 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4595 crq->msg_token, PAGE_SIZE);
4598 /* Adapter is good, but other end is not ready */
4599 dev_warn(dev, "Partner adapter not ready\n");
4601 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4606 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4608 struct ibmvnic_crq_queue *crq = &adapter->crq;
4609 struct vio_dev *vdev = adapter->vdev;
4615 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4616 free_irq(vdev->irq, adapter);
4617 tasklet_kill(&adapter->tasklet);
4619 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4620 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4622 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4624 free_page((unsigned long)crq->msgs);
4626 crq->active = false;
4629 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4631 struct ibmvnic_crq_queue *crq = &adapter->crq;
4632 struct device *dev = &adapter->vdev->dev;
4633 struct vio_dev *vdev = adapter->vdev;
4634 int rc, retrc = -ENOMEM;
4639 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4640 /* Should we allocate more than one page? */
4645 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4646 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4648 if (dma_mapping_error(dev, crq->msg_token))
4651 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4652 crq->msg_token, PAGE_SIZE);
4654 if (rc == H_RESOURCE)
4655 /* maybe kexecing and resource is busy. try a reset */
4656 rc = ibmvnic_reset_crq(adapter);
4659 if (rc == H_CLOSED) {
4660 dev_warn(dev, "Partner adapter not ready\n");
4662 dev_warn(dev, "Error %d opening adapter\n", rc);
4663 goto reg_crq_failed;
4668 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4669 (unsigned long)adapter);
4671 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4672 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
4673 adapter->vdev->unit_address);
4674 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
4676 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4678 goto req_irq_failed;
4681 rc = vio_enable_interrupts(vdev);
4683 dev_err(dev, "Error %d enabling interrupts\n", rc);
4684 goto req_irq_failed;
4688 spin_lock_init(&crq->lock);
4693 tasklet_kill(&adapter->tasklet);
4695 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4696 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4698 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4700 free_page((unsigned long)crq->msgs);
4705 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4707 struct device *dev = &adapter->vdev->dev;
4708 unsigned long timeout = msecs_to_jiffies(30000);
4709 u64 old_num_rx_queues, old_num_tx_queues;
4712 adapter->from_passive_init = false;
4714 old_num_rx_queues = adapter->req_rx_queues;
4715 old_num_tx_queues = adapter->req_tx_queues;
4717 reinit_completion(&adapter->init_done);
4718 adapter->init_done_rc = 0;
4719 ibmvnic_send_crq_init(adapter);
4720 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4721 dev_err(dev, "Initialization sequence timed out\n");
4725 if (adapter->init_done_rc) {
4726 release_crq_queue(adapter);
4727 return adapter->init_done_rc;
4730 if (adapter->from_passive_init) {
4731 adapter->state = VNIC_OPEN;
4732 adapter->from_passive_init = false;
4736 if (adapter->resetting && !adapter->wait_for_reset &&
4737 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4738 if (adapter->req_rx_queues != old_num_rx_queues ||
4739 adapter->req_tx_queues != old_num_tx_queues) {
4740 release_sub_crqs(adapter, 0);
4741 rc = init_sub_crqs(adapter);
4743 rc = reset_sub_crq_queues(adapter);
4746 rc = init_sub_crqs(adapter);
4750 dev_err(dev, "Initialization of sub crqs failed\n");
4751 release_crq_queue(adapter);
4755 rc = init_sub_crq_irqs(adapter);
4757 dev_err(dev, "Failed to initialize sub crq irqs\n");
4758 release_crq_queue(adapter);
4764 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4766 struct device *dev = &adapter->vdev->dev;
4767 unsigned long timeout = msecs_to_jiffies(30000);
4770 adapter->from_passive_init = false;
4772 adapter->init_done_rc = 0;
4773 ibmvnic_send_crq_init(adapter);
4774 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4775 dev_err(dev, "Initialization sequence timed out\n");
4779 if (adapter->init_done_rc) {
4780 release_crq_queue(adapter);
4781 return adapter->init_done_rc;
4784 if (adapter->from_passive_init) {
4785 adapter->state = VNIC_OPEN;
4786 adapter->from_passive_init = false;
4790 rc = init_sub_crqs(adapter);
4792 dev_err(dev, "Initialization of sub crqs failed\n");
4793 release_crq_queue(adapter);
4797 rc = init_sub_crq_irqs(adapter);
4799 dev_err(dev, "Failed to initialize sub crq irqs\n");
4800 release_crq_queue(adapter);
4806 static struct device_attribute dev_attr_failover;
4808 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4810 struct ibmvnic_adapter *adapter;
4811 struct net_device *netdev;
4812 unsigned char *mac_addr_p;
4815 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4818 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4819 VETH_MAC_ADDR, NULL);
4822 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4823 __FILE__, __LINE__);
4827 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4828 IBMVNIC_MAX_QUEUES);
4832 adapter = netdev_priv(netdev);
4833 adapter->state = VNIC_PROBING;
4834 dev_set_drvdata(&dev->dev, netdev);
4835 adapter->vdev = dev;
4836 adapter->netdev = netdev;
4838 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4839 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4840 netdev->irq = dev->irq;
4841 netdev->netdev_ops = &ibmvnic_netdev_ops;
4842 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4843 SET_NETDEV_DEV(netdev, &dev->dev);
4845 spin_lock_init(&adapter->stats_lock);
4847 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4848 INIT_LIST_HEAD(&adapter->rwi_list);
4849 spin_lock_init(&adapter->rwi_lock);
4850 init_completion(&adapter->init_done);
4851 adapter->resetting = false;
4854 rc = init_crq_queue(adapter);
4856 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4858 goto ibmvnic_init_fail;
4861 rc = ibmvnic_init(adapter);
4862 if (rc && rc != EAGAIN)
4863 goto ibmvnic_init_fail;
4864 } while (rc == EAGAIN);
4866 rc = init_stats_buffers(adapter);
4868 goto ibmvnic_init_fail;
4870 rc = init_stats_token(adapter);
4872 goto ibmvnic_stats_fail;
4874 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4875 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4876 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4878 rc = device_create_file(&dev->dev, &dev_attr_failover);
4880 goto ibmvnic_dev_file_err;
4882 netif_carrier_off(netdev);
4883 rc = register_netdev(netdev);
4885 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4886 goto ibmvnic_register_fail;
4888 dev_info(&dev->dev, "ibmvnic registered\n");
4890 adapter->state = VNIC_PROBED;
4892 adapter->wait_for_reset = false;
4896 ibmvnic_register_fail:
4897 device_remove_file(&dev->dev, &dev_attr_failover);
4899 ibmvnic_dev_file_err:
4900 release_stats_token(adapter);
4903 release_stats_buffers(adapter);
4906 release_sub_crqs(adapter, 1);
4907 release_crq_queue(adapter);
4908 free_netdev(netdev);
4913 static int ibmvnic_remove(struct vio_dev *dev)
4915 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4916 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4918 adapter->state = VNIC_REMOVING;
4920 unregister_netdevice(netdev);
4922 release_resources(adapter);
4923 release_sub_crqs(adapter, 1);
4924 release_crq_queue(adapter);
4926 release_stats_token(adapter);
4927 release_stats_buffers(adapter);
4929 adapter->state = VNIC_REMOVED;
4932 device_remove_file(&dev->dev, &dev_attr_failover);
4933 free_netdev(netdev);
4934 dev_set_drvdata(&dev->dev, NULL);
4939 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4940 const char *buf, size_t count)
4942 struct net_device *netdev = dev_get_drvdata(dev);
4943 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4944 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4945 __be64 session_token;
4948 if (!sysfs_streq(buf, "1"))
4951 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4952 H_GET_SESSION_TOKEN, 0, 0, 0);
4954 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4959 session_token = (__be64)retbuf[0];
4960 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4961 be64_to_cpu(session_token));
4962 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4963 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4965 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4973 static DEVICE_ATTR_WO(failover);
4975 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4977 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4978 struct ibmvnic_adapter *adapter;
4979 struct iommu_table *tbl;
4980 unsigned long ret = 0;
4983 tbl = get_iommu_table_base(&vdev->dev);
4985 /* netdev inits at probe time along with the structures we need below*/
4987 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4989 adapter = netdev_priv(netdev);
4991 ret += PAGE_SIZE; /* the crq message queue */
4992 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4994 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4995 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4997 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4999 ret += adapter->rx_pool[i].size *
5000 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5005 static int ibmvnic_resume(struct device *dev)
5007 struct net_device *netdev = dev_get_drvdata(dev);
5008 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5010 if (adapter->state != VNIC_OPEN)
5013 tasklet_schedule(&adapter->tasklet);
5018 static const struct vio_device_id ibmvnic_device_table[] = {
5019 {"network", "IBM,vnic"},
5022 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5024 static const struct dev_pm_ops ibmvnic_pm_ops = {
5025 .resume = ibmvnic_resume
5028 static struct vio_driver ibmvnic_driver = {
5029 .id_table = ibmvnic_device_table,
5030 .probe = ibmvnic_probe,
5031 .remove = ibmvnic_remove,
5032 .get_desired_dma = ibmvnic_get_desired_dma,
5033 .name = ibmvnic_driver_name,
5034 .pm = &ibmvnic_pm_ops,
5037 /* module functions */
5038 static int __init ibmvnic_module_init(void)
5040 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5041 IBMVNIC_DRIVER_VERSION);
5043 return vio_register_driver(&ibmvnic_driver);
5046 static void __exit ibmvnic_module_exit(void)
5048 vio_unregister_driver(&ibmvnic_driver);
5051 module_init(ibmvnic_module_init);
5052 module_exit(ibmvnic_module_exit);