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);
163 * ibmvnic_wait_for_completion - Check device state and wait for completion
164 * @adapter: private device data
165 * @comp_done: completion structure to wait for
166 * @timeout: time to wait in milliseconds
168 * Wait for a completion signal or until the timeout limit is reached
169 * while checking that the device is still active.
171 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
172 struct completion *comp_done,
173 unsigned long timeout)
175 struct net_device *netdev;
176 unsigned long div_timeout;
179 netdev = adapter->netdev;
181 div_timeout = msecs_to_jiffies(timeout / retry);
183 if (!adapter->crq.active) {
184 netdev_err(netdev, "Device down!\n");
189 if (wait_for_completion_timeout(comp_done, div_timeout))
192 netdev_err(netdev, "Operation timed out.\n");
196 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
197 struct ibmvnic_long_term_buff *ltb, int size)
199 struct device *dev = &adapter->vdev->dev;
203 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
207 dev_err(dev, "Couldn't alloc long term buffer\n");
210 ltb->map_id = adapter->map_id;
213 mutex_lock(&adapter->fw_lock);
214 adapter->fw_done_rc = 0;
215 reinit_completion(&adapter->fw_done);
216 rc = send_request_map(adapter, ltb->addr,
217 ltb->size, ltb->map_id);
219 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
220 mutex_unlock(&adapter->fw_lock);
224 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
227 "Long term map request aborted or timed out,rc = %d\n",
229 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
230 mutex_unlock(&adapter->fw_lock);
234 if (adapter->fw_done_rc) {
235 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
236 adapter->fw_done_rc);
237 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
238 mutex_unlock(&adapter->fw_lock);
241 mutex_unlock(&adapter->fw_lock);
245 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
246 struct ibmvnic_long_term_buff *ltb)
248 struct device *dev = &adapter->vdev->dev;
253 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
254 adapter->reset_reason != VNIC_RESET_MOBILITY)
255 send_request_unmap(adapter, ltb->map_id);
256 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
259 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
260 struct ibmvnic_long_term_buff *ltb)
262 struct device *dev = &adapter->vdev->dev;
265 memset(ltb->buff, 0, ltb->size);
267 mutex_lock(&adapter->fw_lock);
268 adapter->fw_done_rc = 0;
270 reinit_completion(&adapter->fw_done);
271 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
273 mutex_unlock(&adapter->fw_lock);
277 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
280 "Reset failed, long term map request timed out or aborted\n");
281 mutex_unlock(&adapter->fw_lock);
285 if (adapter->fw_done_rc) {
287 "Reset failed, attempting to free and reallocate buffer\n");
288 free_long_term_buff(adapter, ltb);
289 mutex_unlock(&adapter->fw_lock);
290 return alloc_long_term_buff(adapter, ltb, ltb->size);
292 mutex_unlock(&adapter->fw_lock);
296 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
300 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
302 adapter->rx_pool[i].active = 0;
305 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
306 struct ibmvnic_rx_pool *pool)
308 int count = pool->size - atomic_read(&pool->available);
309 struct device *dev = &adapter->vdev->dev;
310 int buffers_added = 0;
311 unsigned long lpar_rc;
312 union sub_crq sub_crq;
325 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
326 be32_to_cpu(adapter->login_rsp_buf->
329 for (i = 0; i < count; ++i) {
330 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
332 dev_err(dev, "Couldn't replenish rx buff\n");
333 adapter->replenish_no_mem++;
337 index = pool->free_map[pool->next_free];
339 if (pool->rx_buff[index].skb)
340 dev_err(dev, "Inconsistent free_map!\n");
342 /* Copy the skb to the long term mapped DMA buffer */
343 offset = index * pool->buff_size;
344 dst = pool->long_term_buff.buff + offset;
345 memset(dst, 0, pool->buff_size);
346 dma_addr = pool->long_term_buff.addr + offset;
347 pool->rx_buff[index].data = dst;
349 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
350 pool->rx_buff[index].dma = dma_addr;
351 pool->rx_buff[index].skb = skb;
352 pool->rx_buff[index].pool_index = pool->index;
353 pool->rx_buff[index].size = pool->buff_size;
355 memset(&sub_crq, 0, sizeof(sub_crq));
356 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
357 sub_crq.rx_add.correlator =
358 cpu_to_be64((u64)&pool->rx_buff[index]);
359 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
360 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
362 /* The length field of the sCRQ is defined to be 24 bits so the
363 * buffer size needs to be left shifted by a byte before it is
364 * converted to big endian to prevent the last byte from being
367 #ifdef __LITTLE_ENDIAN__
370 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
372 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
374 if (lpar_rc != H_SUCCESS)
378 adapter->replenish_add_buff_success++;
379 pool->next_free = (pool->next_free + 1) % pool->size;
381 atomic_add(buffers_added, &pool->available);
385 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
386 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
387 pool->free_map[pool->next_free] = index;
388 pool->rx_buff[index].skb = NULL;
390 dev_kfree_skb_any(skb);
391 adapter->replenish_add_buff_failure++;
392 atomic_add(buffers_added, &pool->available);
394 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
395 /* Disable buffer pool replenishment and report carrier off if
396 * queue is closed or pending failover.
397 * Firmware guarantees that a signal will be sent to the
398 * driver, triggering a reset.
400 deactivate_rx_pools(adapter);
401 netif_carrier_off(adapter->netdev);
405 static void replenish_pools(struct ibmvnic_adapter *adapter)
409 adapter->replenish_task_cycles++;
410 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
412 if (adapter->rx_pool[i].active)
413 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
417 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
419 kfree(adapter->tx_stats_buffers);
420 kfree(adapter->rx_stats_buffers);
421 adapter->tx_stats_buffers = NULL;
422 adapter->rx_stats_buffers = NULL;
425 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
427 adapter->tx_stats_buffers =
428 kcalloc(IBMVNIC_MAX_QUEUES,
429 sizeof(struct ibmvnic_tx_queue_stats),
431 if (!adapter->tx_stats_buffers)
434 adapter->rx_stats_buffers =
435 kcalloc(IBMVNIC_MAX_QUEUES,
436 sizeof(struct ibmvnic_rx_queue_stats),
438 if (!adapter->rx_stats_buffers)
444 static void release_stats_token(struct ibmvnic_adapter *adapter)
446 struct device *dev = &adapter->vdev->dev;
448 if (!adapter->stats_token)
451 dma_unmap_single(dev, adapter->stats_token,
452 sizeof(struct ibmvnic_statistics),
454 adapter->stats_token = 0;
457 static int init_stats_token(struct ibmvnic_adapter *adapter)
459 struct device *dev = &adapter->vdev->dev;
462 stok = dma_map_single(dev, &adapter->stats,
463 sizeof(struct ibmvnic_statistics),
465 if (dma_mapping_error(dev, stok)) {
466 dev_err(dev, "Couldn't map stats buffer\n");
470 adapter->stats_token = stok;
471 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
475 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
477 struct ibmvnic_rx_pool *rx_pool;
482 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
483 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
485 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
486 for (i = 0; i < rx_scrqs; i++) {
487 rx_pool = &adapter->rx_pool[i];
489 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
491 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
492 free_long_term_buff(adapter, &rx_pool->long_term_buff);
493 rx_pool->buff_size = be64_to_cpu(size_array[i]);
494 rc = alloc_long_term_buff(adapter,
495 &rx_pool->long_term_buff,
499 rc = reset_long_term_buff(adapter,
500 &rx_pool->long_term_buff);
506 for (j = 0; j < rx_pool->size; j++)
507 rx_pool->free_map[j] = j;
509 memset(rx_pool->rx_buff, 0,
510 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
512 atomic_set(&rx_pool->available, 0);
513 rx_pool->next_alloc = 0;
514 rx_pool->next_free = 0;
521 static void release_rx_pools(struct ibmvnic_adapter *adapter)
523 struct ibmvnic_rx_pool *rx_pool;
526 if (!adapter->rx_pool)
529 for (i = 0; i < adapter->num_active_rx_pools; i++) {
530 rx_pool = &adapter->rx_pool[i];
532 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
534 kfree(rx_pool->free_map);
535 free_long_term_buff(adapter, &rx_pool->long_term_buff);
537 if (!rx_pool->rx_buff)
540 for (j = 0; j < rx_pool->size; j++) {
541 if (rx_pool->rx_buff[j].skb) {
542 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
543 rx_pool->rx_buff[j].skb = NULL;
547 kfree(rx_pool->rx_buff);
550 kfree(adapter->rx_pool);
551 adapter->rx_pool = NULL;
552 adapter->num_active_rx_pools = 0;
555 static int init_rx_pools(struct net_device *netdev)
557 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
558 struct device *dev = &adapter->vdev->dev;
559 struct ibmvnic_rx_pool *rx_pool;
565 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
566 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
567 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
569 adapter->rx_pool = kcalloc(rxadd_subcrqs,
570 sizeof(struct ibmvnic_rx_pool),
572 if (!adapter->rx_pool) {
573 dev_err(dev, "Failed to allocate rx pools\n");
577 adapter->num_active_rx_pools = rxadd_subcrqs;
579 for (i = 0; i < rxadd_subcrqs; i++) {
580 rx_pool = &adapter->rx_pool[i];
582 netdev_dbg(adapter->netdev,
583 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
584 i, adapter->req_rx_add_entries_per_subcrq,
585 be64_to_cpu(size_array[i]));
587 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
589 rx_pool->buff_size = be64_to_cpu(size_array[i]);
592 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
594 if (!rx_pool->free_map) {
595 release_rx_pools(adapter);
599 rx_pool->rx_buff = kcalloc(rx_pool->size,
600 sizeof(struct ibmvnic_rx_buff),
602 if (!rx_pool->rx_buff) {
603 dev_err(dev, "Couldn't alloc rx buffers\n");
604 release_rx_pools(adapter);
608 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
609 rx_pool->size * rx_pool->buff_size)) {
610 release_rx_pools(adapter);
614 for (j = 0; j < rx_pool->size; ++j)
615 rx_pool->free_map[j] = j;
617 atomic_set(&rx_pool->available, 0);
618 rx_pool->next_alloc = 0;
619 rx_pool->next_free = 0;
625 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
626 struct ibmvnic_tx_pool *tx_pool)
630 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
634 memset(tx_pool->tx_buff, 0,
635 tx_pool->num_buffers *
636 sizeof(struct ibmvnic_tx_buff));
638 for (i = 0; i < tx_pool->num_buffers; i++)
639 tx_pool->free_map[i] = i;
641 tx_pool->consumer_index = 0;
642 tx_pool->producer_index = 0;
647 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
652 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
653 for (i = 0; i < tx_scrqs; i++) {
654 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
657 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
665 static void release_vpd_data(struct ibmvnic_adapter *adapter)
670 kfree(adapter->vpd->buff);
676 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
677 struct ibmvnic_tx_pool *tx_pool)
679 kfree(tx_pool->tx_buff);
680 kfree(tx_pool->free_map);
681 free_long_term_buff(adapter, &tx_pool->long_term_buff);
684 static void release_tx_pools(struct ibmvnic_adapter *adapter)
688 if (!adapter->tx_pool)
691 for (i = 0; i < adapter->num_active_tx_pools; i++) {
692 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
693 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
696 kfree(adapter->tx_pool);
697 adapter->tx_pool = NULL;
698 kfree(adapter->tso_pool);
699 adapter->tso_pool = NULL;
700 adapter->num_active_tx_pools = 0;
703 static int init_one_tx_pool(struct net_device *netdev,
704 struct ibmvnic_tx_pool *tx_pool,
705 int num_entries, int buf_size)
707 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
710 tx_pool->tx_buff = kcalloc(num_entries,
711 sizeof(struct ibmvnic_tx_buff),
713 if (!tx_pool->tx_buff)
716 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
717 num_entries * buf_size))
720 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
721 if (!tx_pool->free_map)
724 for (i = 0; i < num_entries; i++)
725 tx_pool->free_map[i] = i;
727 tx_pool->consumer_index = 0;
728 tx_pool->producer_index = 0;
729 tx_pool->num_buffers = num_entries;
730 tx_pool->buf_size = buf_size;
735 static int init_tx_pools(struct net_device *netdev)
737 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
741 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
742 adapter->tx_pool = kcalloc(tx_subcrqs,
743 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
744 if (!adapter->tx_pool)
747 adapter->tso_pool = kcalloc(tx_subcrqs,
748 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
749 if (!adapter->tso_pool)
752 adapter->num_active_tx_pools = tx_subcrqs;
754 for (i = 0; i < tx_subcrqs; i++) {
755 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
756 adapter->req_tx_entries_per_subcrq,
757 adapter->req_mtu + VLAN_HLEN);
759 release_tx_pools(adapter);
763 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
767 release_tx_pools(adapter);
775 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
779 if (adapter->napi_enabled)
782 for (i = 0; i < adapter->req_rx_queues; i++)
783 napi_enable(&adapter->napi[i]);
785 adapter->napi_enabled = true;
788 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
792 if (!adapter->napi_enabled)
795 for (i = 0; i < adapter->req_rx_queues; i++) {
796 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
797 napi_disable(&adapter->napi[i]);
800 adapter->napi_enabled = false;
803 static int init_napi(struct ibmvnic_adapter *adapter)
807 adapter->napi = kcalloc(adapter->req_rx_queues,
808 sizeof(struct napi_struct), GFP_KERNEL);
812 for (i = 0; i < adapter->req_rx_queues; i++) {
813 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
814 netif_napi_add(adapter->netdev, &adapter->napi[i],
815 ibmvnic_poll, NAPI_POLL_WEIGHT);
818 adapter->num_active_rx_napi = adapter->req_rx_queues;
822 static void release_napi(struct ibmvnic_adapter *adapter)
829 for (i = 0; i < adapter->num_active_rx_napi; i++) {
830 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
831 netif_napi_del(&adapter->napi[i]);
834 kfree(adapter->napi);
835 adapter->napi = NULL;
836 adapter->num_active_rx_napi = 0;
837 adapter->napi_enabled = false;
840 static int ibmvnic_login(struct net_device *netdev)
842 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
843 unsigned long timeout = msecs_to_jiffies(30000);
850 if (retry_count > IBMVNIC_MAX_QUEUES) {
851 netdev_warn(netdev, "Login attempts exceeded\n");
855 adapter->init_done_rc = 0;
856 reinit_completion(&adapter->init_done);
857 rc = send_login(adapter);
859 netdev_warn(netdev, "Unable to login\n");
863 if (!wait_for_completion_timeout(&adapter->init_done,
865 netdev_warn(netdev, "Login timed out\n");
869 if (adapter->init_done_rc == PARTIALSUCCESS) {
871 release_sub_crqs(adapter, 1);
875 "Received partial success, retrying...\n");
876 adapter->init_done_rc = 0;
877 reinit_completion(&adapter->init_done);
878 send_cap_queries(adapter);
879 if (!wait_for_completion_timeout(&adapter->init_done,
882 "Capabilities query timed out\n");
886 rc = init_sub_crqs(adapter);
889 "SCRQ initialization failed\n");
893 rc = init_sub_crq_irqs(adapter);
896 "SCRQ irq initialization failed\n");
899 } else if (adapter->init_done_rc) {
900 netdev_warn(netdev, "Adapter login failed\n");
905 __ibmvnic_set_mac(netdev, adapter->mac_addr);
910 static void release_login_buffer(struct ibmvnic_adapter *adapter)
912 kfree(adapter->login_buf);
913 adapter->login_buf = NULL;
916 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
918 kfree(adapter->login_rsp_buf);
919 adapter->login_rsp_buf = NULL;
922 static void release_resources(struct ibmvnic_adapter *adapter)
924 release_vpd_data(adapter);
926 release_tx_pools(adapter);
927 release_rx_pools(adapter);
929 release_napi(adapter);
930 release_login_rsp_buffer(adapter);
933 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
935 struct net_device *netdev = adapter->netdev;
936 unsigned long timeout = msecs_to_jiffies(30000);
937 union ibmvnic_crq crq;
941 netdev_dbg(netdev, "setting link state %d\n", link_state);
943 memset(&crq, 0, sizeof(crq));
944 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
945 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
946 crq.logical_link_state.link_state = link_state;
951 reinit_completion(&adapter->init_done);
952 rc = ibmvnic_send_crq(adapter, &crq);
954 netdev_err(netdev, "Failed to set link state\n");
958 if (!wait_for_completion_timeout(&adapter->init_done,
960 netdev_err(netdev, "timeout setting link state\n");
964 if (adapter->init_done_rc == 1) {
965 /* Partuial success, delay and re-send */
968 } else if (adapter->init_done_rc) {
969 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
970 adapter->init_done_rc);
971 return adapter->init_done_rc;
978 static int set_real_num_queues(struct net_device *netdev)
980 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
983 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
984 adapter->req_tx_queues, adapter->req_rx_queues);
986 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
988 netdev_err(netdev, "failed to set the number of tx queues\n");
992 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
994 netdev_err(netdev, "failed to set the number of rx queues\n");
999 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1001 struct device *dev = &adapter->vdev->dev;
1002 union ibmvnic_crq crq;
1006 if (adapter->vpd->buff)
1007 len = adapter->vpd->len;
1009 mutex_lock(&adapter->fw_lock);
1010 adapter->fw_done_rc = 0;
1011 reinit_completion(&adapter->fw_done);
1013 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1014 crq.get_vpd_size.cmd = GET_VPD_SIZE;
1015 rc = ibmvnic_send_crq(adapter, &crq);
1017 mutex_unlock(&adapter->fw_lock);
1021 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1023 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1024 mutex_unlock(&adapter->fw_lock);
1027 mutex_unlock(&adapter->fw_lock);
1029 if (!adapter->vpd->len)
1032 if (!adapter->vpd->buff)
1033 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1034 else if (adapter->vpd->len != len)
1035 adapter->vpd->buff =
1036 krealloc(adapter->vpd->buff,
1037 adapter->vpd->len, GFP_KERNEL);
1039 if (!adapter->vpd->buff) {
1040 dev_err(dev, "Could allocate VPD buffer\n");
1044 adapter->vpd->dma_addr =
1045 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1047 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1048 dev_err(dev, "Could not map VPD buffer\n");
1049 kfree(adapter->vpd->buff);
1050 adapter->vpd->buff = NULL;
1054 mutex_lock(&adapter->fw_lock);
1055 adapter->fw_done_rc = 0;
1056 reinit_completion(&adapter->fw_done);
1058 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1059 crq.get_vpd.cmd = GET_VPD;
1060 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1061 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1062 rc = ibmvnic_send_crq(adapter, &crq);
1064 kfree(adapter->vpd->buff);
1065 adapter->vpd->buff = NULL;
1066 mutex_unlock(&adapter->fw_lock);
1070 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1072 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1073 kfree(adapter->vpd->buff);
1074 adapter->vpd->buff = NULL;
1075 mutex_unlock(&adapter->fw_lock);
1079 mutex_unlock(&adapter->fw_lock);
1083 static int init_resources(struct ibmvnic_adapter *adapter)
1085 struct net_device *netdev = adapter->netdev;
1088 rc = set_real_num_queues(netdev);
1092 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1096 /* Vital Product Data (VPD) */
1097 rc = ibmvnic_get_vpd(adapter);
1099 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1103 adapter->map_id = 1;
1105 rc = init_napi(adapter);
1109 send_map_query(adapter);
1111 rc = init_rx_pools(netdev);
1115 rc = init_tx_pools(netdev);
1119 static int __ibmvnic_open(struct net_device *netdev)
1121 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1122 enum vnic_state prev_state = adapter->state;
1125 adapter->state = VNIC_OPENING;
1126 replenish_pools(adapter);
1127 ibmvnic_napi_enable(adapter);
1129 /* We're ready to receive frames, enable the sub-crq interrupts and
1130 * set the logical link state to up
1132 for (i = 0; i < adapter->req_rx_queues; i++) {
1133 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1134 if (prev_state == VNIC_CLOSED)
1135 enable_irq(adapter->rx_scrq[i]->irq);
1136 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1139 for (i = 0; i < adapter->req_tx_queues; i++) {
1140 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1141 if (prev_state == VNIC_CLOSED)
1142 enable_irq(adapter->tx_scrq[i]->irq);
1143 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1146 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1148 for (i = 0; i < adapter->req_rx_queues; i++)
1149 napi_disable(&adapter->napi[i]);
1150 release_resources(adapter);
1154 netif_tx_start_all_queues(netdev);
1156 if (prev_state == VNIC_CLOSED) {
1157 for (i = 0; i < adapter->req_rx_queues; i++)
1158 napi_schedule(&adapter->napi[i]);
1161 adapter->state = VNIC_OPEN;
1165 static int ibmvnic_open(struct net_device *netdev)
1167 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1170 /* If device failover is pending, just set device state and return.
1171 * Device operation will be handled by reset routine.
1173 if (adapter->failover_pending) {
1174 adapter->state = VNIC_OPEN;
1178 if (adapter->state != VNIC_CLOSED) {
1179 rc = ibmvnic_login(netdev);
1183 rc = init_resources(adapter);
1185 netdev_err(netdev, "failed to initialize resources\n");
1186 release_resources(adapter);
1191 rc = __ibmvnic_open(netdev);
1196 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1198 struct ibmvnic_rx_pool *rx_pool;
1199 struct ibmvnic_rx_buff *rx_buff;
1204 if (!adapter->rx_pool)
1207 rx_scrqs = adapter->num_active_rx_pools;
1208 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1210 /* Free any remaining skbs in the rx buffer pools */
1211 for (i = 0; i < rx_scrqs; i++) {
1212 rx_pool = &adapter->rx_pool[i];
1213 if (!rx_pool || !rx_pool->rx_buff)
1216 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1217 for (j = 0; j < rx_entries; j++) {
1218 rx_buff = &rx_pool->rx_buff[j];
1219 if (rx_buff && rx_buff->skb) {
1220 dev_kfree_skb_any(rx_buff->skb);
1221 rx_buff->skb = NULL;
1227 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1228 struct ibmvnic_tx_pool *tx_pool)
1230 struct ibmvnic_tx_buff *tx_buff;
1234 if (!tx_pool || !tx_pool->tx_buff)
1237 tx_entries = tx_pool->num_buffers;
1239 for (i = 0; i < tx_entries; i++) {
1240 tx_buff = &tx_pool->tx_buff[i];
1241 if (tx_buff && tx_buff->skb) {
1242 dev_kfree_skb_any(tx_buff->skb);
1243 tx_buff->skb = NULL;
1248 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1253 if (!adapter->tx_pool || !adapter->tso_pool)
1256 tx_scrqs = adapter->num_active_tx_pools;
1258 /* Free any remaining skbs in the tx buffer pools */
1259 for (i = 0; i < tx_scrqs; i++) {
1260 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1261 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1262 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1266 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1268 struct net_device *netdev = adapter->netdev;
1271 if (adapter->tx_scrq) {
1272 for (i = 0; i < adapter->req_tx_queues; i++)
1273 if (adapter->tx_scrq[i]->irq) {
1275 "Disabling tx_scrq[%d] irq\n", i);
1276 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1277 disable_irq(adapter->tx_scrq[i]->irq);
1281 if (adapter->rx_scrq) {
1282 for (i = 0; i < adapter->req_rx_queues; i++) {
1283 if (adapter->rx_scrq[i]->irq) {
1285 "Disabling rx_scrq[%d] irq\n", i);
1286 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1287 disable_irq(adapter->rx_scrq[i]->irq);
1293 static void ibmvnic_cleanup(struct net_device *netdev)
1295 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1297 /* ensure that transmissions are stopped if called by do_reset */
1298 if (test_bit(0, &adapter->resetting))
1299 netif_tx_disable(netdev);
1301 netif_tx_stop_all_queues(netdev);
1303 ibmvnic_napi_disable(adapter);
1304 ibmvnic_disable_irqs(adapter);
1306 clean_rx_pools(adapter);
1307 clean_tx_pools(adapter);
1310 static int __ibmvnic_close(struct net_device *netdev)
1312 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1315 adapter->state = VNIC_CLOSING;
1316 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1319 adapter->state = VNIC_CLOSED;
1323 static int ibmvnic_close(struct net_device *netdev)
1325 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1328 /* If device failover is pending, just set device state and return.
1329 * Device operation will be handled by reset routine.
1331 if (adapter->failover_pending) {
1332 adapter->state = VNIC_CLOSED;
1336 rc = __ibmvnic_close(netdev);
1337 ibmvnic_cleanup(netdev);
1343 * build_hdr_data - creates L2/L3/L4 header data buffer
1344 * @hdr_field - bitfield determining needed headers
1345 * @skb - socket buffer
1346 * @hdr_len - array of header lengths
1347 * @tot_len - total length of data
1349 * Reads hdr_field to determine which headers are needed by firmware.
1350 * Builds a buffer containing these headers. Saves individual header
1351 * lengths and total buffer length to be used to build descriptors.
1353 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1354 int *hdr_len, u8 *hdr_data)
1359 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1360 hdr_len[0] = sizeof(struct vlan_ethhdr);
1362 hdr_len[0] = sizeof(struct ethhdr);
1364 if (skb->protocol == htons(ETH_P_IP)) {
1365 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1366 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1367 hdr_len[2] = tcp_hdrlen(skb);
1368 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1369 hdr_len[2] = sizeof(struct udphdr);
1370 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1371 hdr_len[1] = sizeof(struct ipv6hdr);
1372 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1373 hdr_len[2] = tcp_hdrlen(skb);
1374 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1375 hdr_len[2] = sizeof(struct udphdr);
1376 } else if (skb->protocol == htons(ETH_P_ARP)) {
1377 hdr_len[1] = arp_hdr_len(skb->dev);
1381 memset(hdr_data, 0, 120);
1382 if ((hdr_field >> 6) & 1) {
1383 hdr = skb_mac_header(skb);
1384 memcpy(hdr_data, hdr, hdr_len[0]);
1388 if ((hdr_field >> 5) & 1) {
1389 hdr = skb_network_header(skb);
1390 memcpy(hdr_data + len, hdr, hdr_len[1]);
1394 if ((hdr_field >> 4) & 1) {
1395 hdr = skb_transport_header(skb);
1396 memcpy(hdr_data + len, hdr, hdr_len[2]);
1403 * create_hdr_descs - create header and header extension descriptors
1404 * @hdr_field - bitfield determining needed headers
1405 * @data - buffer containing header data
1406 * @len - length of data buffer
1407 * @hdr_len - array of individual header lengths
1408 * @scrq_arr - descriptor array
1410 * Creates header and, if needed, header extension descriptors and
1411 * places them in a descriptor array, scrq_arr
1414 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1415 union sub_crq *scrq_arr)
1417 union sub_crq hdr_desc;
1423 while (tmp_len > 0) {
1424 cur = hdr_data + len - tmp_len;
1426 memset(&hdr_desc, 0, sizeof(hdr_desc));
1427 if (cur != hdr_data) {
1428 data = hdr_desc.hdr_ext.data;
1429 tmp = tmp_len > 29 ? 29 : tmp_len;
1430 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1431 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1432 hdr_desc.hdr_ext.len = tmp;
1434 data = hdr_desc.hdr.data;
1435 tmp = tmp_len > 24 ? 24 : tmp_len;
1436 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1437 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1438 hdr_desc.hdr.len = tmp;
1439 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1440 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1441 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1442 hdr_desc.hdr.flag = hdr_field << 1;
1444 memcpy(data, cur, tmp);
1446 *scrq_arr = hdr_desc;
1455 * build_hdr_descs_arr - build a header descriptor array
1456 * @skb - socket buffer
1457 * @num_entries - number of descriptors to be sent
1458 * @subcrq - first TX descriptor
1459 * @hdr_field - bit field determining which headers will be sent
1461 * This function will build a TX descriptor array with applicable
1462 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1465 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1466 int *num_entries, u8 hdr_field)
1468 int hdr_len[3] = {0, 0, 0};
1470 u8 *hdr_data = txbuff->hdr_data;
1472 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1474 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1475 txbuff->indir_arr + 1);
1478 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1479 struct net_device *netdev)
1481 /* For some backing devices, mishandling of small packets
1482 * can result in a loss of connection or TX stall. Device
1483 * architects recommend that no packet should be smaller
1484 * than the minimum MTU value provided to the driver, so
1485 * pad any packets to that length
1487 if (skb->len < netdev->min_mtu)
1488 return skb_put_padto(skb, netdev->min_mtu);
1493 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1495 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1496 int queue_num = skb_get_queue_mapping(skb);
1497 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1498 struct device *dev = &adapter->vdev->dev;
1499 struct ibmvnic_tx_buff *tx_buff = NULL;
1500 struct ibmvnic_sub_crq_queue *tx_scrq;
1501 struct ibmvnic_tx_pool *tx_pool;
1502 unsigned int tx_send_failed = 0;
1503 unsigned int tx_map_failed = 0;
1504 unsigned int tx_dropped = 0;
1505 unsigned int tx_packets = 0;
1506 unsigned int tx_bytes = 0;
1507 dma_addr_t data_dma_addr;
1508 struct netdev_queue *txq;
1509 unsigned long lpar_rc;
1510 union sub_crq tx_crq;
1511 unsigned int offset;
1512 int num_entries = 1;
1517 netdev_tx_t ret = NETDEV_TX_OK;
1519 if (test_bit(0, &adapter->resetting)) {
1520 if (!netif_subqueue_stopped(netdev, skb))
1521 netif_stop_subqueue(netdev, queue_num);
1522 dev_kfree_skb_any(skb);
1530 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1536 if (skb_is_gso(skb))
1537 tx_pool = &adapter->tso_pool[queue_num];
1539 tx_pool = &adapter->tx_pool[queue_num];
1541 tx_scrq = adapter->tx_scrq[queue_num];
1542 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1543 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1544 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1546 index = tx_pool->free_map[tx_pool->consumer_index];
1548 if (index == IBMVNIC_INVALID_MAP) {
1549 dev_kfree_skb_any(skb);
1556 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1558 offset = index * tx_pool->buf_size;
1559 dst = tx_pool->long_term_buff.buff + offset;
1560 memset(dst, 0, tx_pool->buf_size);
1561 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1563 if (skb_shinfo(skb)->nr_frags) {
1567 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1568 cur = skb_headlen(skb);
1570 /* Copy the frags */
1571 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1572 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1575 page_address(skb_frag_page(frag)) +
1576 skb_frag_off(frag), skb_frag_size(frag));
1577 cur += skb_frag_size(frag);
1580 skb_copy_from_linear_data(skb, dst, skb->len);
1583 tx_pool->consumer_index =
1584 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1586 tx_buff = &tx_pool->tx_buff[index];
1588 tx_buff->data_dma[0] = data_dma_addr;
1589 tx_buff->data_len[0] = skb->len;
1590 tx_buff->index = index;
1591 tx_buff->pool_index = queue_num;
1592 tx_buff->last_frag = true;
1594 memset(&tx_crq, 0, sizeof(tx_crq));
1595 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1596 tx_crq.v1.type = IBMVNIC_TX_DESC;
1597 tx_crq.v1.n_crq_elem = 1;
1598 tx_crq.v1.n_sge = 1;
1599 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1601 if (skb_is_gso(skb))
1602 tx_crq.v1.correlator =
1603 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1605 tx_crq.v1.correlator = cpu_to_be32(index);
1606 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1607 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1608 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1610 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1611 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1612 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1615 if (skb->protocol == htons(ETH_P_IP)) {
1616 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1617 proto = ip_hdr(skb)->protocol;
1618 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1619 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1620 proto = ipv6_hdr(skb)->nexthdr;
1623 if (proto == IPPROTO_TCP)
1624 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1625 else if (proto == IPPROTO_UDP)
1626 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1628 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1629 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1632 if (skb_is_gso(skb)) {
1633 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1634 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1637 /* determine if l2/3/4 headers are sent to firmware */
1638 if ((*hdrs >> 7) & 1) {
1639 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1640 tx_crq.v1.n_crq_elem = num_entries;
1641 tx_buff->num_entries = num_entries;
1642 tx_buff->indir_arr[0] = tx_crq;
1643 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1644 sizeof(tx_buff->indir_arr),
1646 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1647 dev_kfree_skb_any(skb);
1648 tx_buff->skb = NULL;
1649 if (!firmware_has_feature(FW_FEATURE_CMO))
1650 dev_err(dev, "tx: unable to map descriptor array\n");
1656 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1657 (u64)tx_buff->indir_dma,
1659 dma_unmap_single(dev, tx_buff->indir_dma,
1660 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE);
1662 tx_buff->num_entries = num_entries;
1663 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1666 if (lpar_rc != H_SUCCESS) {
1667 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1668 dev_err_ratelimited(dev, "tx: send failed\n");
1669 dev_kfree_skb_any(skb);
1670 tx_buff->skb = NULL;
1672 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1673 /* Disable TX and report carrier off if queue is closed
1674 * or pending failover.
1675 * Firmware guarantees that a signal will be sent to the
1676 * driver, triggering a reset or some other action.
1678 netif_tx_stop_all_queues(netdev);
1679 netif_carrier_off(netdev);
1688 if (atomic_add_return(num_entries, &tx_scrq->used)
1689 >= adapter->req_tx_entries_per_subcrq) {
1690 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1691 netif_stop_subqueue(netdev, queue_num);
1695 tx_bytes += skb->len;
1696 txq->trans_start = jiffies;
1701 /* roll back consumer index and map array*/
1702 if (tx_pool->consumer_index == 0)
1703 tx_pool->consumer_index =
1704 tx_pool->num_buffers - 1;
1706 tx_pool->consumer_index--;
1707 tx_pool->free_map[tx_pool->consumer_index] = index;
1709 netdev->stats.tx_dropped += tx_dropped;
1710 netdev->stats.tx_bytes += tx_bytes;
1711 netdev->stats.tx_packets += tx_packets;
1712 adapter->tx_send_failed += tx_send_failed;
1713 adapter->tx_map_failed += tx_map_failed;
1714 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1715 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1716 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1721 static void ibmvnic_set_multi(struct net_device *netdev)
1723 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1724 struct netdev_hw_addr *ha;
1725 union ibmvnic_crq crq;
1727 memset(&crq, 0, sizeof(crq));
1728 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1729 crq.request_capability.cmd = REQUEST_CAPABILITY;
1731 if (netdev->flags & IFF_PROMISC) {
1732 if (!adapter->promisc_supported)
1735 if (netdev->flags & IFF_ALLMULTI) {
1736 /* Accept all multicast */
1737 memset(&crq, 0, sizeof(crq));
1738 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1739 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1740 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1741 ibmvnic_send_crq(adapter, &crq);
1742 } else if (netdev_mc_empty(netdev)) {
1743 /* Reject all multicast */
1744 memset(&crq, 0, sizeof(crq));
1745 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1746 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1747 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1748 ibmvnic_send_crq(adapter, &crq);
1750 /* Accept one or more multicast(s) */
1751 netdev_for_each_mc_addr(ha, netdev) {
1752 memset(&crq, 0, sizeof(crq));
1753 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1754 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1755 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1756 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1758 ibmvnic_send_crq(adapter, &crq);
1764 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1766 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1767 union ibmvnic_crq crq;
1770 if (!is_valid_ether_addr(dev_addr)) {
1771 rc = -EADDRNOTAVAIL;
1775 memset(&crq, 0, sizeof(crq));
1776 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1777 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1778 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1780 mutex_lock(&adapter->fw_lock);
1781 adapter->fw_done_rc = 0;
1782 reinit_completion(&adapter->fw_done);
1784 rc = ibmvnic_send_crq(adapter, &crq);
1787 mutex_unlock(&adapter->fw_lock);
1791 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1792 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1793 if (rc || adapter->fw_done_rc) {
1795 mutex_unlock(&adapter->fw_lock);
1798 mutex_unlock(&adapter->fw_lock);
1801 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1805 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1807 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1808 struct sockaddr *addr = p;
1812 ether_addr_copy(adapter->mac_addr, addr->sa_data);
1813 if (adapter->state != VNIC_PROBED)
1814 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
1820 * do_change_param_reset returns zero if we are able to keep processing reset
1821 * events, or non-zero if we hit a fatal error and must halt.
1823 static int do_change_param_reset(struct ibmvnic_adapter *adapter,
1824 struct ibmvnic_rwi *rwi,
1827 struct net_device *netdev = adapter->netdev;
1830 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n",
1833 netif_carrier_off(netdev);
1834 adapter->reset_reason = rwi->reset_reason;
1836 ibmvnic_cleanup(netdev);
1838 if (reset_state == VNIC_OPEN) {
1839 rc = __ibmvnic_close(netdev);
1844 release_resources(adapter);
1845 release_sub_crqs(adapter, 1);
1846 release_crq_queue(adapter);
1848 adapter->state = VNIC_PROBED;
1850 rc = init_crq_queue(adapter);
1853 netdev_err(adapter->netdev,
1854 "Couldn't initialize crq. rc=%d\n", rc);
1858 rc = ibmvnic_reset_init(adapter);
1860 return IBMVNIC_INIT_FAILED;
1862 /* If the adapter was in PROBE state prior to the reset,
1865 if (reset_state == VNIC_PROBED)
1868 rc = ibmvnic_login(netdev);
1870 adapter->state = reset_state;
1874 rc = init_resources(adapter);
1878 ibmvnic_disable_irqs(adapter);
1880 adapter->state = VNIC_CLOSED;
1882 if (reset_state == VNIC_CLOSED)
1885 rc = __ibmvnic_open(netdev);
1887 return IBMVNIC_OPEN_FAILED;
1889 /* refresh device's multicast list */
1890 ibmvnic_set_multi(netdev);
1893 for (i = 0; i < adapter->req_rx_queues; i++)
1894 napi_schedule(&adapter->napi[i]);
1900 * do_reset returns zero if we are able to keep processing reset events, or
1901 * non-zero if we hit a fatal error and must halt.
1903 static int do_reset(struct ibmvnic_adapter *adapter,
1904 struct ibmvnic_rwi *rwi, u32 reset_state)
1906 u64 old_num_rx_queues, old_num_tx_queues;
1907 u64 old_num_rx_slots, old_num_tx_slots;
1908 struct net_device *netdev = adapter->netdev;
1911 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1916 netif_carrier_off(netdev);
1917 adapter->reset_reason = rwi->reset_reason;
1919 old_num_rx_queues = adapter->req_rx_queues;
1920 old_num_tx_queues = adapter->req_tx_queues;
1921 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1922 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1924 ibmvnic_cleanup(netdev);
1926 if (reset_state == VNIC_OPEN &&
1927 adapter->reset_reason != VNIC_RESET_MOBILITY &&
1928 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1929 adapter->state = VNIC_CLOSING;
1931 /* Release the RTNL lock before link state change and
1932 * re-acquire after the link state change to allow
1933 * linkwatch_event to grab the RTNL lock and run during
1937 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1942 if (adapter->state != VNIC_CLOSING) {
1947 adapter->state = VNIC_CLOSED;
1950 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1951 /* remove the closed state so when we call open it appears
1952 * we are coming from the probed state.
1954 adapter->state = VNIC_PROBED;
1956 if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1957 rc = ibmvnic_reenable_crq_queue(adapter);
1958 release_sub_crqs(adapter, 1);
1960 rc = ibmvnic_reset_crq(adapter);
1962 rc = vio_enable_interrupts(adapter->vdev);
1966 netdev_err(adapter->netdev,
1967 "Couldn't initialize crq. rc=%d\n", rc);
1971 rc = ibmvnic_reset_init(adapter);
1973 rc = IBMVNIC_INIT_FAILED;
1977 /* If the adapter was in PROBE state prior to the reset,
1980 if (reset_state == VNIC_PROBED) {
1985 rc = ibmvnic_login(netdev);
1987 adapter->state = reset_state;
1991 if (adapter->req_rx_queues != old_num_rx_queues ||
1992 adapter->req_tx_queues != old_num_tx_queues ||
1993 adapter->req_rx_add_entries_per_subcrq !=
1995 adapter->req_tx_entries_per_subcrq !=
1997 release_rx_pools(adapter);
1998 release_tx_pools(adapter);
1999 release_napi(adapter);
2000 release_vpd_data(adapter);
2002 rc = init_resources(adapter);
2007 rc = reset_tx_pools(adapter);
2011 rc = reset_rx_pools(adapter);
2015 ibmvnic_disable_irqs(adapter);
2017 adapter->state = VNIC_CLOSED;
2019 if (reset_state == VNIC_CLOSED) {
2024 rc = __ibmvnic_open(netdev);
2026 rc = IBMVNIC_OPEN_FAILED;
2030 /* refresh device's multicast list */
2031 ibmvnic_set_multi(netdev);
2034 for (i = 0; i < adapter->req_rx_queues; i++)
2035 napi_schedule(&adapter->napi[i]);
2037 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
2038 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
2048 static int do_hard_reset(struct ibmvnic_adapter *adapter,
2049 struct ibmvnic_rwi *rwi, u32 reset_state)
2051 struct net_device *netdev = adapter->netdev;
2054 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
2057 netif_carrier_off(netdev);
2058 adapter->reset_reason = rwi->reset_reason;
2060 ibmvnic_cleanup(netdev);
2061 release_resources(adapter);
2062 release_sub_crqs(adapter, 0);
2063 release_crq_queue(adapter);
2065 /* remove the closed state so when we call open it appears
2066 * we are coming from the probed state.
2068 adapter->state = VNIC_PROBED;
2070 reinit_completion(&adapter->init_done);
2071 rc = init_crq_queue(adapter);
2073 netdev_err(adapter->netdev,
2074 "Couldn't initialize crq. rc=%d\n", rc);
2078 rc = ibmvnic_init(adapter);
2082 /* If the adapter was in PROBE state prior to the reset,
2085 if (reset_state == VNIC_PROBED)
2088 rc = ibmvnic_login(netdev);
2090 adapter->state = VNIC_PROBED;
2094 rc = init_resources(adapter);
2098 ibmvnic_disable_irqs(adapter);
2099 adapter->state = VNIC_CLOSED;
2101 if (reset_state == VNIC_CLOSED)
2104 rc = __ibmvnic_open(netdev);
2106 return IBMVNIC_OPEN_FAILED;
2111 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2113 struct ibmvnic_rwi *rwi;
2114 unsigned long flags;
2116 spin_lock_irqsave(&adapter->rwi_lock, flags);
2118 if (!list_empty(&adapter->rwi_list)) {
2119 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2121 list_del(&rwi->list);
2126 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2130 static void free_all_rwi(struct ibmvnic_adapter *adapter)
2132 struct ibmvnic_rwi *rwi;
2134 rwi = get_next_rwi(adapter);
2137 rwi = get_next_rwi(adapter);
2141 static void __ibmvnic_reset(struct work_struct *work)
2143 struct ibmvnic_rwi *rwi;
2144 struct ibmvnic_adapter *adapter;
2145 bool saved_state = false;
2146 unsigned long flags;
2150 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2152 if (test_and_set_bit_lock(0, &adapter->resetting)) {
2153 schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
2154 IBMVNIC_RESET_DELAY);
2158 rwi = get_next_rwi(adapter);
2160 spin_lock_irqsave(&adapter->state_lock, flags);
2162 if (adapter->state == VNIC_REMOVING ||
2163 adapter->state == VNIC_REMOVED) {
2164 spin_unlock_irqrestore(&adapter->state_lock, flags);
2171 reset_state = adapter->state;
2172 adapter->state = VNIC_RESETTING;
2175 spin_unlock_irqrestore(&adapter->state_lock, flags);
2177 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2178 /* CHANGE_PARAM requestor holds rtnl_lock */
2179 rc = do_change_param_reset(adapter, rwi, reset_state);
2180 } else if (adapter->force_reset_recovery) {
2181 /* Transport event occurred during previous reset */
2182 if (adapter->wait_for_reset) {
2183 /* Previous was CHANGE_PARAM; caller locked */
2184 adapter->force_reset_recovery = false;
2185 rc = do_hard_reset(adapter, rwi, reset_state);
2188 adapter->force_reset_recovery = false;
2189 rc = do_hard_reset(adapter, rwi, reset_state);
2193 rc = do_reset(adapter, rwi, reset_state);
2196 if (rc == IBMVNIC_OPEN_FAILED) {
2197 if (list_empty(&adapter->rwi_list))
2198 adapter->state = VNIC_CLOSED;
2200 adapter->state = reset_state;
2202 } else if (rc && rc != IBMVNIC_INIT_FAILED &&
2203 !adapter->force_reset_recovery)
2206 rwi = get_next_rwi(adapter);
2208 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2209 rwi->reset_reason == VNIC_RESET_MOBILITY))
2210 adapter->force_reset_recovery = true;
2213 if (adapter->wait_for_reset) {
2214 adapter->reset_done_rc = rc;
2215 complete(&adapter->reset_done);
2219 netdev_dbg(adapter->netdev, "Reset failed\n");
2220 free_all_rwi(adapter);
2223 clear_bit_unlock(0, &adapter->resetting);
2226 static void __ibmvnic_delayed_reset(struct work_struct *work)
2228 struct ibmvnic_adapter *adapter;
2230 adapter = container_of(work, struct ibmvnic_adapter,
2231 ibmvnic_delayed_reset.work);
2232 __ibmvnic_reset(&adapter->ibmvnic_reset);
2235 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2236 enum ibmvnic_reset_reason reason)
2238 struct list_head *entry, *tmp_entry;
2239 struct ibmvnic_rwi *rwi, *tmp;
2240 struct net_device *netdev = adapter->netdev;
2241 unsigned long flags;
2244 if (adapter->state == VNIC_REMOVING ||
2245 adapter->state == VNIC_REMOVED ||
2246 adapter->failover_pending) {
2248 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2252 if (adapter->state == VNIC_PROBING) {
2253 netdev_warn(netdev, "Adapter reset during probe\n");
2254 ret = adapter->init_done_rc = EAGAIN;
2258 spin_lock_irqsave(&adapter->rwi_lock, flags);
2260 list_for_each(entry, &adapter->rwi_list) {
2261 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2262 if (tmp->reset_reason == reason) {
2263 netdev_dbg(netdev, "Skipping matching reset\n");
2264 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2270 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2272 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2273 ibmvnic_close(netdev);
2277 /* if we just received a transport event,
2278 * flush reset queue and process this reset
2280 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2281 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2284 rwi->reset_reason = reason;
2285 list_add_tail(&rwi->list, &adapter->rwi_list);
2286 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2287 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2288 schedule_work(&adapter->ibmvnic_reset);
2295 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2297 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2299 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2302 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2303 struct ibmvnic_rx_buff *rx_buff)
2305 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2307 rx_buff->skb = NULL;
2309 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2310 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2312 atomic_dec(&pool->available);
2315 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2317 struct net_device *netdev = napi->dev;
2318 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2319 int scrq_num = (int)(napi - adapter->napi);
2320 int frames_processed = 0;
2323 while (frames_processed < budget) {
2324 struct sk_buff *skb;
2325 struct ibmvnic_rx_buff *rx_buff;
2326 union sub_crq *next;
2331 if (unlikely(test_bit(0, &adapter->resetting) &&
2332 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2333 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2334 napi_complete_done(napi, frames_processed);
2335 return frames_processed;
2338 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2340 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2342 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2343 rx_comp.correlator);
2344 /* do error checking */
2345 if (next->rx_comp.rc) {
2346 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2347 be16_to_cpu(next->rx_comp.rc));
2348 /* free the entry */
2349 next->rx_comp.first = 0;
2350 dev_kfree_skb_any(rx_buff->skb);
2351 remove_buff_from_pool(adapter, rx_buff);
2353 } else if (!rx_buff->skb) {
2354 /* free the entry */
2355 next->rx_comp.first = 0;
2356 remove_buff_from_pool(adapter, rx_buff);
2360 length = be32_to_cpu(next->rx_comp.len);
2361 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2362 flags = next->rx_comp.flags;
2364 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2367 /* VLAN Header has been stripped by the system firmware and
2368 * needs to be inserted by the driver
2370 if (adapter->rx_vlan_header_insertion &&
2371 (flags & IBMVNIC_VLAN_STRIPPED))
2372 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2373 ntohs(next->rx_comp.vlan_tci));
2375 /* free the entry */
2376 next->rx_comp.first = 0;
2377 remove_buff_from_pool(adapter, rx_buff);
2379 skb_put(skb, length);
2380 skb->protocol = eth_type_trans(skb, netdev);
2381 skb_record_rx_queue(skb, scrq_num);
2383 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2384 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2385 skb->ip_summed = CHECKSUM_UNNECESSARY;
2389 napi_gro_receive(napi, skb); /* send it up */
2390 netdev->stats.rx_packets++;
2391 netdev->stats.rx_bytes += length;
2392 adapter->rx_stats_buffers[scrq_num].packets++;
2393 adapter->rx_stats_buffers[scrq_num].bytes += length;
2397 if (adapter->state != VNIC_CLOSING)
2398 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2400 if (frames_processed < budget) {
2401 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2402 napi_complete_done(napi, frames_processed);
2403 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2404 napi_reschedule(napi)) {
2405 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2409 return frames_processed;
2412 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2416 adapter->fallback.mtu = adapter->req_mtu;
2417 adapter->fallback.rx_queues = adapter->req_rx_queues;
2418 adapter->fallback.tx_queues = adapter->req_tx_queues;
2419 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2420 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2422 reinit_completion(&adapter->reset_done);
2423 adapter->wait_for_reset = true;
2424 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2430 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2437 if (adapter->reset_done_rc) {
2439 adapter->desired.mtu = adapter->fallback.mtu;
2440 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2441 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2442 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2443 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2445 reinit_completion(&adapter->reset_done);
2446 adapter->wait_for_reset = true;
2447 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2452 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2460 adapter->wait_for_reset = false;
2465 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2467 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2469 adapter->desired.mtu = new_mtu + ETH_HLEN;
2471 return wait_for_reset(adapter);
2474 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2475 struct net_device *dev,
2476 netdev_features_t features)
2478 /* Some backing hardware adapters can not
2479 * handle packets with a MSS less than 224
2480 * or with only one segment.
2482 if (skb_is_gso(skb)) {
2483 if (skb_shinfo(skb)->gso_size < 224 ||
2484 skb_shinfo(skb)->gso_segs == 1)
2485 features &= ~NETIF_F_GSO_MASK;
2491 static const struct net_device_ops ibmvnic_netdev_ops = {
2492 .ndo_open = ibmvnic_open,
2493 .ndo_stop = ibmvnic_close,
2494 .ndo_start_xmit = ibmvnic_xmit,
2495 .ndo_set_rx_mode = ibmvnic_set_multi,
2496 .ndo_set_mac_address = ibmvnic_set_mac,
2497 .ndo_validate_addr = eth_validate_addr,
2498 .ndo_tx_timeout = ibmvnic_tx_timeout,
2499 .ndo_change_mtu = ibmvnic_change_mtu,
2500 .ndo_features_check = ibmvnic_features_check,
2503 /* ethtool functions */
2505 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2506 struct ethtool_link_ksettings *cmd)
2508 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2511 rc = send_query_phys_parms(adapter);
2513 adapter->speed = SPEED_UNKNOWN;
2514 adapter->duplex = DUPLEX_UNKNOWN;
2516 cmd->base.speed = adapter->speed;
2517 cmd->base.duplex = adapter->duplex;
2518 cmd->base.port = PORT_FIBRE;
2519 cmd->base.phy_address = 0;
2520 cmd->base.autoneg = AUTONEG_ENABLE;
2525 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2526 struct ethtool_drvinfo *info)
2528 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2530 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2531 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2532 strlcpy(info->fw_version, adapter->fw_version,
2533 sizeof(info->fw_version));
2536 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2538 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2540 return adapter->msg_enable;
2543 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2545 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2547 adapter->msg_enable = data;
2550 static u32 ibmvnic_get_link(struct net_device *netdev)
2552 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2554 /* Don't need to send a query because we request a logical link up at
2555 * init and then we wait for link state indications
2557 return adapter->logical_link_state;
2560 static void ibmvnic_get_ringparam(struct net_device *netdev,
2561 struct ethtool_ringparam *ring)
2563 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2565 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2566 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2567 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2569 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2570 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2572 ring->rx_mini_max_pending = 0;
2573 ring->rx_jumbo_max_pending = 0;
2574 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2575 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2576 ring->rx_mini_pending = 0;
2577 ring->rx_jumbo_pending = 0;
2580 static int ibmvnic_set_ringparam(struct net_device *netdev,
2581 struct ethtool_ringparam *ring)
2583 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2587 adapter->desired.rx_entries = ring->rx_pending;
2588 adapter->desired.tx_entries = ring->tx_pending;
2590 ret = wait_for_reset(adapter);
2593 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2594 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2596 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2597 ring->rx_pending, ring->tx_pending,
2598 adapter->req_rx_add_entries_per_subcrq,
2599 adapter->req_tx_entries_per_subcrq);
2603 static void ibmvnic_get_channels(struct net_device *netdev,
2604 struct ethtool_channels *channels)
2606 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2608 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2609 channels->max_rx = adapter->max_rx_queues;
2610 channels->max_tx = adapter->max_tx_queues;
2612 channels->max_rx = IBMVNIC_MAX_QUEUES;
2613 channels->max_tx = IBMVNIC_MAX_QUEUES;
2616 channels->max_other = 0;
2617 channels->max_combined = 0;
2618 channels->rx_count = adapter->req_rx_queues;
2619 channels->tx_count = adapter->req_tx_queues;
2620 channels->other_count = 0;
2621 channels->combined_count = 0;
2624 static int ibmvnic_set_channels(struct net_device *netdev,
2625 struct ethtool_channels *channels)
2627 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2631 adapter->desired.rx_queues = channels->rx_count;
2632 adapter->desired.tx_queues = channels->tx_count;
2634 ret = wait_for_reset(adapter);
2637 (adapter->req_rx_queues != channels->rx_count ||
2638 adapter->req_tx_queues != channels->tx_count))
2640 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2641 channels->rx_count, channels->tx_count,
2642 adapter->req_rx_queues, adapter->req_tx_queues);
2647 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2649 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2652 switch (stringset) {
2654 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2655 i++, data += ETH_GSTRING_LEN)
2656 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2658 for (i = 0; i < adapter->req_tx_queues; i++) {
2659 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2660 data += ETH_GSTRING_LEN;
2662 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2663 data += ETH_GSTRING_LEN;
2665 snprintf(data, ETH_GSTRING_LEN,
2666 "tx%d_dropped_packets", i);
2667 data += ETH_GSTRING_LEN;
2670 for (i = 0; i < adapter->req_rx_queues; i++) {
2671 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2672 data += ETH_GSTRING_LEN;
2674 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2675 data += ETH_GSTRING_LEN;
2677 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2678 data += ETH_GSTRING_LEN;
2682 case ETH_SS_PRIV_FLAGS:
2683 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2684 strcpy(data + i * ETH_GSTRING_LEN,
2685 ibmvnic_priv_flags[i]);
2692 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2694 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2698 return ARRAY_SIZE(ibmvnic_stats) +
2699 adapter->req_tx_queues * NUM_TX_STATS +
2700 adapter->req_rx_queues * NUM_RX_STATS;
2701 case ETH_SS_PRIV_FLAGS:
2702 return ARRAY_SIZE(ibmvnic_priv_flags);
2708 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2709 struct ethtool_stats *stats, u64 *data)
2711 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2712 union ibmvnic_crq crq;
2716 memset(&crq, 0, sizeof(crq));
2717 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2718 crq.request_statistics.cmd = REQUEST_STATISTICS;
2719 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2720 crq.request_statistics.len =
2721 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2723 /* Wait for data to be written */
2724 reinit_completion(&adapter->stats_done);
2725 rc = ibmvnic_send_crq(adapter, &crq);
2728 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
2732 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2733 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2734 ibmvnic_stats[i].offset));
2736 for (j = 0; j < adapter->req_tx_queues; j++) {
2737 data[i] = adapter->tx_stats_buffers[j].packets;
2739 data[i] = adapter->tx_stats_buffers[j].bytes;
2741 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2745 for (j = 0; j < adapter->req_rx_queues; j++) {
2746 data[i] = adapter->rx_stats_buffers[j].packets;
2748 data[i] = adapter->rx_stats_buffers[j].bytes;
2750 data[i] = adapter->rx_stats_buffers[j].interrupts;
2755 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2757 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2759 return adapter->priv_flags;
2762 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2764 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2765 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2768 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2770 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2774 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2775 .get_drvinfo = ibmvnic_get_drvinfo,
2776 .get_msglevel = ibmvnic_get_msglevel,
2777 .set_msglevel = ibmvnic_set_msglevel,
2778 .get_link = ibmvnic_get_link,
2779 .get_ringparam = ibmvnic_get_ringparam,
2780 .set_ringparam = ibmvnic_set_ringparam,
2781 .get_channels = ibmvnic_get_channels,
2782 .set_channels = ibmvnic_set_channels,
2783 .get_strings = ibmvnic_get_strings,
2784 .get_sset_count = ibmvnic_get_sset_count,
2785 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2786 .get_link_ksettings = ibmvnic_get_link_ksettings,
2787 .get_priv_flags = ibmvnic_get_priv_flags,
2788 .set_priv_flags = ibmvnic_set_priv_flags,
2791 /* Routines for managing CRQs/sCRQs */
2793 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2794 struct ibmvnic_sub_crq_queue *scrq)
2799 free_irq(scrq->irq, scrq);
2800 irq_dispose_mapping(scrq->irq);
2804 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2805 atomic_set(&scrq->used, 0);
2808 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2809 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2813 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2817 for (i = 0; i < adapter->req_tx_queues; i++) {
2818 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2819 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2824 for (i = 0; i < adapter->req_rx_queues; i++) {
2825 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2826 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2834 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2835 struct ibmvnic_sub_crq_queue *scrq,
2838 struct device *dev = &adapter->vdev->dev;
2841 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2844 /* Close the sub-crqs */
2846 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2847 adapter->vdev->unit_address,
2849 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2852 netdev_err(adapter->netdev,
2853 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2858 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2860 free_pages((unsigned long)scrq->msgs, 2);
2864 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2867 struct device *dev = &adapter->vdev->dev;
2868 struct ibmvnic_sub_crq_queue *scrq;
2871 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2876 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2878 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2879 goto zero_page_failed;
2882 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2884 if (dma_mapping_error(dev, scrq->msg_token)) {
2885 dev_warn(dev, "Couldn't map crq queue messages page\n");
2889 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2890 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2892 if (rc == H_RESOURCE)
2893 rc = ibmvnic_reset_crq(adapter);
2895 if (rc == H_CLOSED) {
2896 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2898 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2902 scrq->adapter = adapter;
2903 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2904 spin_lock_init(&scrq->lock);
2906 netdev_dbg(adapter->netdev,
2907 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2908 scrq->crq_num, scrq->hw_irq, scrq->irq);
2913 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2916 free_pages((unsigned long)scrq->msgs, 2);
2923 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2927 if (adapter->tx_scrq) {
2928 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2929 if (!adapter->tx_scrq[i])
2932 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2934 if (adapter->tx_scrq[i]->irq) {
2935 free_irq(adapter->tx_scrq[i]->irq,
2936 adapter->tx_scrq[i]);
2937 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2938 adapter->tx_scrq[i]->irq = 0;
2941 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2945 kfree(adapter->tx_scrq);
2946 adapter->tx_scrq = NULL;
2947 adapter->num_active_tx_scrqs = 0;
2950 if (adapter->rx_scrq) {
2951 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2952 if (!adapter->rx_scrq[i])
2955 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2957 if (adapter->rx_scrq[i]->irq) {
2958 free_irq(adapter->rx_scrq[i]->irq,
2959 adapter->rx_scrq[i]);
2960 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2961 adapter->rx_scrq[i]->irq = 0;
2964 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2968 kfree(adapter->rx_scrq);
2969 adapter->rx_scrq = NULL;
2970 adapter->num_active_rx_scrqs = 0;
2974 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2975 struct ibmvnic_sub_crq_queue *scrq)
2977 struct device *dev = &adapter->vdev->dev;
2980 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2981 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2983 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2988 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2989 struct ibmvnic_sub_crq_queue *scrq)
2991 struct device *dev = &adapter->vdev->dev;
2994 if (scrq->hw_irq > 0x100000000ULL) {
2995 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2999 if (test_bit(0, &adapter->resetting) &&
3000 adapter->reset_reason == VNIC_RESET_MOBILITY) {
3001 u64 val = (0xff000000) | scrq->hw_irq;
3003 rc = plpar_hcall_norets(H_EOI, val);
3004 /* H_EOI would fail with rc = H_FUNCTION when running
3005 * in XIVE mode which is expected, but not an error.
3007 if (rc && (rc != H_FUNCTION))
3008 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3012 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3013 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3015 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3020 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3021 struct ibmvnic_sub_crq_queue *scrq)
3023 struct device *dev = &adapter->vdev->dev;
3024 struct ibmvnic_tx_pool *tx_pool;
3025 struct ibmvnic_tx_buff *txbuff;
3026 union sub_crq *next;
3031 while (pending_scrq(adapter, scrq)) {
3032 unsigned int pool = scrq->pool_index;
3033 int num_entries = 0;
3035 next = ibmvnic_next_scrq(adapter, scrq);
3036 for (i = 0; i < next->tx_comp.num_comps; i++) {
3037 if (next->tx_comp.rcs[i]) {
3038 dev_err(dev, "tx error %x\n",
3039 next->tx_comp.rcs[i]);
3042 index = be32_to_cpu(next->tx_comp.correlators[i]);
3043 if (index & IBMVNIC_TSO_POOL_MASK) {
3044 tx_pool = &adapter->tso_pool[pool];
3045 index &= ~IBMVNIC_TSO_POOL_MASK;
3047 tx_pool = &adapter->tx_pool[pool];
3050 txbuff = &tx_pool->tx_buff[index];
3052 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
3053 if (!txbuff->data_dma[j])
3056 txbuff->data_dma[j] = 0;
3059 if (txbuff->last_frag) {
3060 dev_kfree_skb_any(txbuff->skb);
3064 num_entries += txbuff->num_entries;
3066 tx_pool->free_map[tx_pool->producer_index] = index;
3067 tx_pool->producer_index =
3068 (tx_pool->producer_index + 1) %
3069 tx_pool->num_buffers;
3071 /* remove tx_comp scrq*/
3072 next->tx_comp.first = 0;
3074 if (atomic_sub_return(num_entries, &scrq->used) <=
3075 (adapter->req_tx_entries_per_subcrq / 2) &&
3076 __netif_subqueue_stopped(adapter->netdev,
3077 scrq->pool_index)) {
3078 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3079 netdev_dbg(adapter->netdev, "Started queue %d\n",
3084 enable_scrq_irq(adapter, scrq);
3086 if (pending_scrq(adapter, scrq)) {
3087 disable_scrq_irq(adapter, scrq);
3094 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3096 struct ibmvnic_sub_crq_queue *scrq = instance;
3097 struct ibmvnic_adapter *adapter = scrq->adapter;
3099 disable_scrq_irq(adapter, scrq);
3100 ibmvnic_complete_tx(adapter, scrq);
3105 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3107 struct ibmvnic_sub_crq_queue *scrq = instance;
3108 struct ibmvnic_adapter *adapter = scrq->adapter;
3110 /* When booting a kdump kernel we can hit pending interrupts
3111 * prior to completing driver initialization.
3113 if (unlikely(adapter->state != VNIC_OPEN))
3116 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3118 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3119 disable_scrq_irq(adapter, scrq);
3120 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3126 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3128 struct device *dev = &adapter->vdev->dev;
3129 struct ibmvnic_sub_crq_queue *scrq;
3133 for (i = 0; i < adapter->req_tx_queues; i++) {
3134 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3136 scrq = adapter->tx_scrq[i];
3137 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3141 dev_err(dev, "Error mapping irq\n");
3142 goto req_tx_irq_failed;
3145 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3146 adapter->vdev->unit_address, i);
3147 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3148 0, scrq->name, scrq);
3151 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3153 irq_dispose_mapping(scrq->irq);
3154 goto req_tx_irq_failed;
3158 for (i = 0; i < adapter->req_rx_queues; i++) {
3159 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3161 scrq = adapter->rx_scrq[i];
3162 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3165 dev_err(dev, "Error mapping irq\n");
3166 goto req_rx_irq_failed;
3168 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3169 adapter->vdev->unit_address, i);
3170 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3171 0, scrq->name, scrq);
3173 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3175 irq_dispose_mapping(scrq->irq);
3176 goto req_rx_irq_failed;
3182 for (j = 0; j < i; j++) {
3183 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3184 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3186 i = adapter->req_tx_queues;
3188 for (j = 0; j < i; j++) {
3189 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3190 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3192 release_sub_crqs(adapter, 1);
3196 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3198 struct device *dev = &adapter->vdev->dev;
3199 struct ibmvnic_sub_crq_queue **allqueues;
3200 int registered_queues = 0;
3205 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3207 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3211 for (i = 0; i < total_queues; i++) {
3212 allqueues[i] = init_sub_crq_queue(adapter);
3213 if (!allqueues[i]) {
3214 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3217 registered_queues++;
3220 /* Make sure we were able to register the minimum number of queues */
3221 if (registered_queues <
3222 adapter->min_tx_queues + adapter->min_rx_queues) {
3223 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3227 /* Distribute the failed allocated queues*/
3228 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3229 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3232 if (adapter->req_rx_queues > adapter->min_rx_queues)
3233 adapter->req_rx_queues--;
3238 if (adapter->req_tx_queues > adapter->min_tx_queues)
3239 adapter->req_tx_queues--;
3246 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3247 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3248 if (!adapter->tx_scrq)
3251 for (i = 0; i < adapter->req_tx_queues; i++) {
3252 adapter->tx_scrq[i] = allqueues[i];
3253 adapter->tx_scrq[i]->pool_index = i;
3254 adapter->num_active_tx_scrqs++;
3257 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3258 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3259 if (!adapter->rx_scrq)
3262 for (i = 0; i < adapter->req_rx_queues; i++) {
3263 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3264 adapter->rx_scrq[i]->scrq_num = i;
3265 adapter->num_active_rx_scrqs++;
3272 kfree(adapter->tx_scrq);
3273 adapter->tx_scrq = NULL;
3275 for (i = 0; i < registered_queues; i++)
3276 release_sub_crq_queue(adapter, allqueues[i], 1);
3281 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3283 struct device *dev = &adapter->vdev->dev;
3284 union ibmvnic_crq crq;
3288 /* Sub-CRQ entries are 32 byte long */
3289 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3291 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3292 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3293 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3297 if (adapter->desired.mtu)
3298 adapter->req_mtu = adapter->desired.mtu;
3300 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3302 if (!adapter->desired.tx_entries)
3303 adapter->desired.tx_entries =
3304 adapter->max_tx_entries_per_subcrq;
3305 if (!adapter->desired.rx_entries)
3306 adapter->desired.rx_entries =
3307 adapter->max_rx_add_entries_per_subcrq;
3309 max_entries = IBMVNIC_MAX_LTB_SIZE /
3310 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3312 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3313 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3314 adapter->desired.tx_entries = max_entries;
3317 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3318 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3319 adapter->desired.rx_entries = max_entries;
3322 if (adapter->desired.tx_entries)
3323 adapter->req_tx_entries_per_subcrq =
3324 adapter->desired.tx_entries;
3326 adapter->req_tx_entries_per_subcrq =
3327 adapter->max_tx_entries_per_subcrq;
3329 if (adapter->desired.rx_entries)
3330 adapter->req_rx_add_entries_per_subcrq =
3331 adapter->desired.rx_entries;
3333 adapter->req_rx_add_entries_per_subcrq =
3334 adapter->max_rx_add_entries_per_subcrq;
3336 if (adapter->desired.tx_queues)
3337 adapter->req_tx_queues =
3338 adapter->desired.tx_queues;
3340 adapter->req_tx_queues =
3341 adapter->opt_tx_comp_sub_queues;
3343 if (adapter->desired.rx_queues)
3344 adapter->req_rx_queues =
3345 adapter->desired.rx_queues;
3347 adapter->req_rx_queues =
3348 adapter->opt_rx_comp_queues;
3350 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3353 memset(&crq, 0, sizeof(crq));
3354 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3355 crq.request_capability.cmd = REQUEST_CAPABILITY;
3357 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3358 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3359 atomic_inc(&adapter->running_cap_crqs);
3360 ibmvnic_send_crq(adapter, &crq);
3362 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3363 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3364 atomic_inc(&adapter->running_cap_crqs);
3365 ibmvnic_send_crq(adapter, &crq);
3367 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3368 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3369 atomic_inc(&adapter->running_cap_crqs);
3370 ibmvnic_send_crq(adapter, &crq);
3372 crq.request_capability.capability =
3373 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3374 crq.request_capability.number =
3375 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3376 atomic_inc(&adapter->running_cap_crqs);
3377 ibmvnic_send_crq(adapter, &crq);
3379 crq.request_capability.capability =
3380 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3381 crq.request_capability.number =
3382 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3383 atomic_inc(&adapter->running_cap_crqs);
3384 ibmvnic_send_crq(adapter, &crq);
3386 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3387 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3388 atomic_inc(&adapter->running_cap_crqs);
3389 ibmvnic_send_crq(adapter, &crq);
3391 if (adapter->netdev->flags & IFF_PROMISC) {
3392 if (adapter->promisc_supported) {
3393 crq.request_capability.capability =
3394 cpu_to_be16(PROMISC_REQUESTED);
3395 crq.request_capability.number = cpu_to_be64(1);
3396 atomic_inc(&adapter->running_cap_crqs);
3397 ibmvnic_send_crq(adapter, &crq);
3400 crq.request_capability.capability =
3401 cpu_to_be16(PROMISC_REQUESTED);
3402 crq.request_capability.number = cpu_to_be64(0);
3403 atomic_inc(&adapter->running_cap_crqs);
3404 ibmvnic_send_crq(adapter, &crq);
3408 static int pending_scrq(struct ibmvnic_adapter *adapter,
3409 struct ibmvnic_sub_crq_queue *scrq)
3411 union sub_crq *entry = &scrq->msgs[scrq->cur];
3413 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3419 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3420 struct ibmvnic_sub_crq_queue *scrq)
3422 union sub_crq *entry;
3423 unsigned long flags;
3425 spin_lock_irqsave(&scrq->lock, flags);
3426 entry = &scrq->msgs[scrq->cur];
3427 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3428 if (++scrq->cur == scrq->size)
3433 spin_unlock_irqrestore(&scrq->lock, flags);
3438 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3440 struct ibmvnic_crq_queue *queue = &adapter->crq;
3441 union ibmvnic_crq *crq;
3443 crq = &queue->msgs[queue->cur];
3444 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3445 if (++queue->cur == queue->size)
3454 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3458 dev_warn_ratelimited(dev,
3459 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3463 dev_warn_ratelimited(dev,
3464 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3468 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3473 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3474 union sub_crq *sub_crq)
3476 unsigned int ua = adapter->vdev->unit_address;
3477 struct device *dev = &adapter->vdev->dev;
3478 u64 *u64_crq = (u64 *)sub_crq;
3481 netdev_dbg(adapter->netdev,
3482 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3483 (unsigned long int)cpu_to_be64(remote_handle),
3484 (unsigned long int)cpu_to_be64(u64_crq[0]),
3485 (unsigned long int)cpu_to_be64(u64_crq[1]),
3486 (unsigned long int)cpu_to_be64(u64_crq[2]),
3487 (unsigned long int)cpu_to_be64(u64_crq[3]));
3489 /* Make sure the hypervisor sees the complete request */
3492 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3493 cpu_to_be64(remote_handle),
3494 cpu_to_be64(u64_crq[0]),
3495 cpu_to_be64(u64_crq[1]),
3496 cpu_to_be64(u64_crq[2]),
3497 cpu_to_be64(u64_crq[3]));
3500 print_subcrq_error(dev, rc, __func__);
3505 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3506 u64 remote_handle, u64 ioba, u64 num_entries)
3508 unsigned int ua = adapter->vdev->unit_address;
3509 struct device *dev = &adapter->vdev->dev;
3512 /* Make sure the hypervisor sees the complete request */
3514 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3515 cpu_to_be64(remote_handle),
3519 print_subcrq_error(dev, rc, __func__);
3524 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3525 union ibmvnic_crq *crq)
3527 unsigned int ua = adapter->vdev->unit_address;
3528 struct device *dev = &adapter->vdev->dev;
3529 u64 *u64_crq = (u64 *)crq;
3532 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3533 (unsigned long int)cpu_to_be64(u64_crq[0]),
3534 (unsigned long int)cpu_to_be64(u64_crq[1]));
3536 if (!adapter->crq.active &&
3537 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3538 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3542 /* Make sure the hypervisor sees the complete request */
3545 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3546 cpu_to_be64(u64_crq[0]),
3547 cpu_to_be64(u64_crq[1]));
3550 if (rc == H_CLOSED) {
3551 dev_warn(dev, "CRQ Queue closed\n");
3552 if (test_bit(0, &adapter->resetting))
3553 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3556 dev_warn(dev, "Send error (rc=%d)\n", rc);
3562 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3564 union ibmvnic_crq crq;
3566 memset(&crq, 0, sizeof(crq));
3567 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3568 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3569 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3571 return ibmvnic_send_crq(adapter, &crq);
3574 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3576 union ibmvnic_crq crq;
3578 memset(&crq, 0, sizeof(crq));
3579 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3580 crq.version_exchange.cmd = VERSION_EXCHANGE;
3581 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3583 return ibmvnic_send_crq(adapter, &crq);
3586 struct vnic_login_client_data {
3592 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3596 /* Calculate the amount of buffer space needed for the
3597 * vnic client data in the login buffer. There are four entries,
3598 * OS name, LPAR name, device name, and a null last entry.
3600 len = 4 * sizeof(struct vnic_login_client_data);
3601 len += 6; /* "Linux" plus NULL */
3602 len += strlen(utsname()->nodename) + 1;
3603 len += strlen(adapter->netdev->name) + 1;
3608 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3609 struct vnic_login_client_data *vlcd)
3611 const char *os_name = "Linux";
3614 /* Type 1 - LPAR OS */
3616 len = strlen(os_name) + 1;
3617 vlcd->len = cpu_to_be16(len);
3618 strncpy(vlcd->name, os_name, len);
3619 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3621 /* Type 2 - LPAR name */
3623 len = strlen(utsname()->nodename) + 1;
3624 vlcd->len = cpu_to_be16(len);
3625 strncpy(vlcd->name, utsname()->nodename, len);
3626 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3628 /* Type 3 - device name */
3630 len = strlen(adapter->netdev->name) + 1;
3631 vlcd->len = cpu_to_be16(len);
3632 strncpy(vlcd->name, adapter->netdev->name, len);
3635 static int send_login(struct ibmvnic_adapter *adapter)
3637 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3638 struct ibmvnic_login_buffer *login_buffer;
3639 struct device *dev = &adapter->vdev->dev;
3640 dma_addr_t rsp_buffer_token;
3641 dma_addr_t buffer_token;
3642 size_t rsp_buffer_size;
3643 union ibmvnic_crq crq;
3647 int client_data_len;
3648 struct vnic_login_client_data *vlcd;
3651 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3652 netdev_err(adapter->netdev,
3653 "RX or TX queues are not allocated, device login failed\n");
3657 release_login_rsp_buffer(adapter);
3658 client_data_len = vnic_client_data_len(adapter);
3661 sizeof(struct ibmvnic_login_buffer) +
3662 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3665 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3667 goto buf_alloc_failed;
3669 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3671 if (dma_mapping_error(dev, buffer_token)) {
3672 dev_err(dev, "Couldn't map login buffer\n");
3673 goto buf_map_failed;
3676 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3677 sizeof(u64) * adapter->req_tx_queues +
3678 sizeof(u64) * adapter->req_rx_queues +
3679 sizeof(u64) * adapter->req_rx_queues +
3680 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3682 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3683 if (!login_rsp_buffer)
3684 goto buf_rsp_alloc_failed;
3686 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3687 rsp_buffer_size, DMA_FROM_DEVICE);
3688 if (dma_mapping_error(dev, rsp_buffer_token)) {
3689 dev_err(dev, "Couldn't map login rsp buffer\n");
3690 goto buf_rsp_map_failed;
3693 adapter->login_buf = login_buffer;
3694 adapter->login_buf_token = buffer_token;
3695 adapter->login_buf_sz = buffer_size;
3696 adapter->login_rsp_buf = login_rsp_buffer;
3697 adapter->login_rsp_buf_token = rsp_buffer_token;
3698 adapter->login_rsp_buf_sz = rsp_buffer_size;
3700 login_buffer->len = cpu_to_be32(buffer_size);
3701 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3702 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3703 login_buffer->off_txcomp_subcrqs =
3704 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3705 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3706 login_buffer->off_rxcomp_subcrqs =
3707 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3708 sizeof(u64) * adapter->req_tx_queues);
3709 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3710 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3712 tx_list_p = (__be64 *)((char *)login_buffer +
3713 sizeof(struct ibmvnic_login_buffer));
3714 rx_list_p = (__be64 *)((char *)login_buffer +
3715 sizeof(struct ibmvnic_login_buffer) +
3716 sizeof(u64) * adapter->req_tx_queues);
3718 for (i = 0; i < adapter->req_tx_queues; i++) {
3719 if (adapter->tx_scrq[i]) {
3720 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3725 for (i = 0; i < adapter->req_rx_queues; i++) {
3726 if (adapter->rx_scrq[i]) {
3727 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3732 /* Insert vNIC login client data */
3733 vlcd = (struct vnic_login_client_data *)
3734 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3735 login_buffer->client_data_offset =
3736 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3737 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3739 vnic_add_client_data(adapter, vlcd);
3741 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3742 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3743 netdev_dbg(adapter->netdev, "%016lx\n",
3744 ((unsigned long int *)(adapter->login_buf))[i]);
3747 memset(&crq, 0, sizeof(crq));
3748 crq.login.first = IBMVNIC_CRQ_CMD;
3749 crq.login.cmd = LOGIN;
3750 crq.login.ioba = cpu_to_be32(buffer_token);
3751 crq.login.len = cpu_to_be32(buffer_size);
3752 ibmvnic_send_crq(adapter, &crq);
3757 kfree(login_rsp_buffer);
3758 buf_rsp_alloc_failed:
3759 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3761 kfree(login_buffer);
3766 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3769 union ibmvnic_crq crq;
3771 memset(&crq, 0, sizeof(crq));
3772 crq.request_map.first = IBMVNIC_CRQ_CMD;
3773 crq.request_map.cmd = REQUEST_MAP;
3774 crq.request_map.map_id = map_id;
3775 crq.request_map.ioba = cpu_to_be32(addr);
3776 crq.request_map.len = cpu_to_be32(len);
3777 return ibmvnic_send_crq(adapter, &crq);
3780 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3782 union ibmvnic_crq crq;
3784 memset(&crq, 0, sizeof(crq));
3785 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3786 crq.request_unmap.cmd = REQUEST_UNMAP;
3787 crq.request_unmap.map_id = map_id;
3788 return ibmvnic_send_crq(adapter, &crq);
3791 static void send_map_query(struct ibmvnic_adapter *adapter)
3793 union ibmvnic_crq crq;
3795 memset(&crq, 0, sizeof(crq));
3796 crq.query_map.first = IBMVNIC_CRQ_CMD;
3797 crq.query_map.cmd = QUERY_MAP;
3798 ibmvnic_send_crq(adapter, &crq);
3801 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3802 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3804 union ibmvnic_crq crq;
3806 atomic_set(&adapter->running_cap_crqs, 0);
3807 memset(&crq, 0, sizeof(crq));
3808 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3809 crq.query_capability.cmd = QUERY_CAPABILITY;
3811 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3812 atomic_inc(&adapter->running_cap_crqs);
3813 ibmvnic_send_crq(adapter, &crq);
3815 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3816 atomic_inc(&adapter->running_cap_crqs);
3817 ibmvnic_send_crq(adapter, &crq);
3819 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3820 atomic_inc(&adapter->running_cap_crqs);
3821 ibmvnic_send_crq(adapter, &crq);
3823 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3824 atomic_inc(&adapter->running_cap_crqs);
3825 ibmvnic_send_crq(adapter, &crq);
3827 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3828 atomic_inc(&adapter->running_cap_crqs);
3829 ibmvnic_send_crq(adapter, &crq);
3831 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3832 atomic_inc(&adapter->running_cap_crqs);
3833 ibmvnic_send_crq(adapter, &crq);
3835 crq.query_capability.capability =
3836 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3837 atomic_inc(&adapter->running_cap_crqs);
3838 ibmvnic_send_crq(adapter, &crq);
3840 crq.query_capability.capability =
3841 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3842 atomic_inc(&adapter->running_cap_crqs);
3843 ibmvnic_send_crq(adapter, &crq);
3845 crq.query_capability.capability =
3846 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3847 atomic_inc(&adapter->running_cap_crqs);
3848 ibmvnic_send_crq(adapter, &crq);
3850 crq.query_capability.capability =
3851 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3852 atomic_inc(&adapter->running_cap_crqs);
3853 ibmvnic_send_crq(adapter, &crq);
3855 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3856 atomic_inc(&adapter->running_cap_crqs);
3857 ibmvnic_send_crq(adapter, &crq);
3859 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3860 atomic_inc(&adapter->running_cap_crqs);
3861 ibmvnic_send_crq(adapter, &crq);
3863 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3864 atomic_inc(&adapter->running_cap_crqs);
3865 ibmvnic_send_crq(adapter, &crq);
3867 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3868 atomic_inc(&adapter->running_cap_crqs);
3869 ibmvnic_send_crq(adapter, &crq);
3871 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3872 atomic_inc(&adapter->running_cap_crqs);
3873 ibmvnic_send_crq(adapter, &crq);
3875 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3876 atomic_inc(&adapter->running_cap_crqs);
3877 ibmvnic_send_crq(adapter, &crq);
3879 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3880 atomic_inc(&adapter->running_cap_crqs);
3881 ibmvnic_send_crq(adapter, &crq);
3883 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3884 atomic_inc(&adapter->running_cap_crqs);
3885 ibmvnic_send_crq(adapter, &crq);
3887 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3888 atomic_inc(&adapter->running_cap_crqs);
3889 ibmvnic_send_crq(adapter, &crq);
3891 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3892 atomic_inc(&adapter->running_cap_crqs);
3893 ibmvnic_send_crq(adapter, &crq);
3895 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3896 atomic_inc(&adapter->running_cap_crqs);
3897 ibmvnic_send_crq(adapter, &crq);
3899 crq.query_capability.capability =
3900 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3901 atomic_inc(&adapter->running_cap_crqs);
3902 ibmvnic_send_crq(adapter, &crq);
3904 crq.query_capability.capability =
3905 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3906 atomic_inc(&adapter->running_cap_crqs);
3907 ibmvnic_send_crq(adapter, &crq);
3909 crq.query_capability.capability =
3910 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3911 atomic_inc(&adapter->running_cap_crqs);
3912 ibmvnic_send_crq(adapter, &crq);
3914 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3915 atomic_inc(&adapter->running_cap_crqs);
3916 ibmvnic_send_crq(adapter, &crq);
3919 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3920 struct ibmvnic_adapter *adapter)
3922 struct device *dev = &adapter->vdev->dev;
3924 if (crq->get_vpd_size_rsp.rc.code) {
3925 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3926 crq->get_vpd_size_rsp.rc.code);
3927 complete(&adapter->fw_done);
3931 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3932 complete(&adapter->fw_done);
3935 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3936 struct ibmvnic_adapter *adapter)
3938 struct device *dev = &adapter->vdev->dev;
3939 unsigned char *substr = NULL;
3940 u8 fw_level_len = 0;
3942 memset(adapter->fw_version, 0, 32);
3944 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3947 if (crq->get_vpd_rsp.rc.code) {
3948 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3949 crq->get_vpd_rsp.rc.code);
3953 /* get the position of the firmware version info
3954 * located after the ASCII 'RM' substring in the buffer
3956 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3958 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3962 /* get length of firmware level ASCII substring */
3963 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3964 fw_level_len = *(substr + 2);
3966 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3970 /* copy firmware version string from vpd into adapter */
3971 if ((substr + 3 + fw_level_len) <
3972 (adapter->vpd->buff + adapter->vpd->len)) {
3973 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3975 dev_info(dev, "FW substr extrapolated VPD buff\n");
3979 if (adapter->fw_version[0] == '\0')
3980 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3981 complete(&adapter->fw_done);
3984 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3986 struct device *dev = &adapter->vdev->dev;
3987 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3988 netdev_features_t old_hw_features = 0;
3989 union ibmvnic_crq crq;
3992 dma_unmap_single(dev, adapter->ip_offload_tok,
3993 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3995 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3996 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3997 netdev_dbg(adapter->netdev, "%016lx\n",
3998 ((unsigned long int *)(buf))[i]);
4000 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4001 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4002 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4003 buf->tcp_ipv4_chksum);
4004 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4005 buf->tcp_ipv6_chksum);
4006 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4007 buf->udp_ipv4_chksum);
4008 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4009 buf->udp_ipv6_chksum);
4010 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4011 buf->large_tx_ipv4);
4012 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4013 buf->large_tx_ipv6);
4014 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4015 buf->large_rx_ipv4);
4016 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4017 buf->large_rx_ipv6);
4018 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4019 buf->max_ipv4_header_size);
4020 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4021 buf->max_ipv6_header_size);
4022 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4023 buf->max_tcp_header_size);
4024 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4025 buf->max_udp_header_size);
4026 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4027 buf->max_large_tx_size);
4028 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4029 buf->max_large_rx_size);
4030 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4031 buf->ipv6_extension_header);
4032 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4033 buf->tcp_pseudosum_req);
4034 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4035 buf->num_ipv6_ext_headers);
4036 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4037 buf->off_ipv6_ext_headers);
4039 adapter->ip_offload_ctrl_tok =
4040 dma_map_single(dev, &adapter->ip_offload_ctrl,
4041 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
4043 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4044 dev_err(dev, "Couldn't map ip offload control buffer\n");
4048 adapter->ip_offload_ctrl.len =
4049 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4050 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
4051 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
4052 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
4053 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4054 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
4055 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4056 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
4057 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
4058 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
4060 /* large_rx disabled for now, additional features needed */
4061 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
4062 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
4064 if (adapter->state != VNIC_PROBING) {
4065 old_hw_features = adapter->netdev->hw_features;
4066 adapter->netdev->hw_features = 0;
4069 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4071 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4072 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4074 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4075 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4077 if ((adapter->netdev->features &
4078 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4079 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4081 if (buf->large_tx_ipv4)
4082 adapter->netdev->hw_features |= NETIF_F_TSO;
4083 if (buf->large_tx_ipv6)
4084 adapter->netdev->hw_features |= NETIF_F_TSO6;
4086 if (adapter->state == VNIC_PROBING) {
4087 adapter->netdev->features |= adapter->netdev->hw_features;
4088 } else if (old_hw_features != adapter->netdev->hw_features) {
4089 netdev_features_t tmp = 0;
4091 /* disable features no longer supported */
4092 adapter->netdev->features &= adapter->netdev->hw_features;
4093 /* turn on features now supported if previously enabled */
4094 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4095 adapter->netdev->hw_features;
4096 adapter->netdev->features |=
4097 tmp & adapter->netdev->wanted_features;
4100 memset(&crq, 0, sizeof(crq));
4101 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4102 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4103 crq.control_ip_offload.len =
4104 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4105 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4106 ibmvnic_send_crq(adapter, &crq);
4109 static const char *ibmvnic_fw_err_cause(u16 cause)
4112 case ADAPTER_PROBLEM:
4113 return "adapter problem";
4115 return "bus problem";
4117 return "firmware problem";
4119 return "device driver problem";
4121 return "EEH recovery";
4123 return "firmware updated";
4125 return "low Memory";
4131 static void handle_error_indication(union ibmvnic_crq *crq,
4132 struct ibmvnic_adapter *adapter)
4134 struct device *dev = &adapter->vdev->dev;
4137 cause = be16_to_cpu(crq->error_indication.error_cause);
4139 dev_warn_ratelimited(dev,
4140 "Firmware reports %serror, cause: %s. Starting recovery...\n",
4141 crq->error_indication.flags
4142 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4143 ibmvnic_fw_err_cause(cause));
4145 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4146 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4148 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4151 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4152 struct ibmvnic_adapter *adapter)
4154 struct net_device *netdev = adapter->netdev;
4155 struct device *dev = &adapter->vdev->dev;
4158 rc = crq->change_mac_addr_rsp.rc.code;
4160 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4163 ether_addr_copy(netdev->dev_addr,
4164 &crq->change_mac_addr_rsp.mac_addr[0]);
4166 complete(&adapter->fw_done);
4170 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4171 struct ibmvnic_adapter *adapter)
4173 struct device *dev = &adapter->vdev->dev;
4177 atomic_dec(&adapter->running_cap_crqs);
4178 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4180 req_value = &adapter->req_tx_queues;
4184 req_value = &adapter->req_rx_queues;
4187 case REQ_RX_ADD_QUEUES:
4188 req_value = &adapter->req_rx_add_queues;
4191 case REQ_TX_ENTRIES_PER_SUBCRQ:
4192 req_value = &adapter->req_tx_entries_per_subcrq;
4193 name = "tx_entries_per_subcrq";
4195 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4196 req_value = &adapter->req_rx_add_entries_per_subcrq;
4197 name = "rx_add_entries_per_subcrq";
4200 req_value = &adapter->req_mtu;
4203 case PROMISC_REQUESTED:
4204 req_value = &adapter->promisc;
4208 dev_err(dev, "Got invalid cap request rsp %d\n",
4209 crq->request_capability.capability);
4213 switch (crq->request_capability_rsp.rc.code) {
4216 case PARTIALSUCCESS:
4217 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4219 (long int)be64_to_cpu(crq->request_capability_rsp.
4222 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4224 pr_err("mtu of %llu is not supported. Reverting.\n",
4226 *req_value = adapter->fallback.mtu;
4229 be64_to_cpu(crq->request_capability_rsp.number);
4232 ibmvnic_send_req_caps(adapter, 1);
4235 dev_err(dev, "Error %d in request cap rsp\n",
4236 crq->request_capability_rsp.rc.code);
4240 /* Done receiving requested capabilities, query IP offload support */
4241 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4242 union ibmvnic_crq newcrq;
4243 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4244 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4245 &adapter->ip_offload_buf;
4247 adapter->wait_capability = false;
4248 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4252 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4253 if (!firmware_has_feature(FW_FEATURE_CMO))
4254 dev_err(dev, "Couldn't map offload buffer\n");
4258 memset(&newcrq, 0, sizeof(newcrq));
4259 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4260 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4261 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4262 newcrq.query_ip_offload.ioba =
4263 cpu_to_be32(adapter->ip_offload_tok);
4265 ibmvnic_send_crq(adapter, &newcrq);
4269 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4270 struct ibmvnic_adapter *adapter)
4272 struct device *dev = &adapter->vdev->dev;
4273 struct net_device *netdev = adapter->netdev;
4274 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4275 struct ibmvnic_login_buffer *login = adapter->login_buf;
4278 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4280 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4281 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4283 /* If the number of queues requested can't be allocated by the
4284 * server, the login response will return with code 1. We will need
4285 * to resend the login buffer with fewer queues requested.
4287 if (login_rsp_crq->generic.rc.code) {
4288 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4289 complete(&adapter->init_done);
4293 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4295 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4296 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4297 netdev_dbg(adapter->netdev, "%016lx\n",
4298 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4302 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4303 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4304 adapter->req_rx_add_queues !=
4305 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4306 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4307 ibmvnic_remove(adapter->vdev);
4310 release_login_buffer(adapter);
4311 complete(&adapter->init_done);
4316 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4317 struct ibmvnic_adapter *adapter)
4319 struct device *dev = &adapter->vdev->dev;
4322 rc = crq->request_unmap_rsp.rc.code;
4324 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4327 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4328 struct ibmvnic_adapter *adapter)
4330 struct net_device *netdev = adapter->netdev;
4331 struct device *dev = &adapter->vdev->dev;
4334 rc = crq->query_map_rsp.rc.code;
4336 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4339 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4340 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4341 crq->query_map_rsp.free_pages);
4344 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4345 struct ibmvnic_adapter *adapter)
4347 struct net_device *netdev = adapter->netdev;
4348 struct device *dev = &adapter->vdev->dev;
4351 atomic_dec(&adapter->running_cap_crqs);
4352 netdev_dbg(netdev, "Outstanding queries: %d\n",
4353 atomic_read(&adapter->running_cap_crqs));
4354 rc = crq->query_capability.rc.code;
4356 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4360 switch (be16_to_cpu(crq->query_capability.capability)) {
4362 adapter->min_tx_queues =
4363 be64_to_cpu(crq->query_capability.number);
4364 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4365 adapter->min_tx_queues);
4368 adapter->min_rx_queues =
4369 be64_to_cpu(crq->query_capability.number);
4370 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4371 adapter->min_rx_queues);
4373 case MIN_RX_ADD_QUEUES:
4374 adapter->min_rx_add_queues =
4375 be64_to_cpu(crq->query_capability.number);
4376 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4377 adapter->min_rx_add_queues);
4380 adapter->max_tx_queues =
4381 be64_to_cpu(crq->query_capability.number);
4382 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4383 adapter->max_tx_queues);
4386 adapter->max_rx_queues =
4387 be64_to_cpu(crq->query_capability.number);
4388 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4389 adapter->max_rx_queues);
4391 case MAX_RX_ADD_QUEUES:
4392 adapter->max_rx_add_queues =
4393 be64_to_cpu(crq->query_capability.number);
4394 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4395 adapter->max_rx_add_queues);
4397 case MIN_TX_ENTRIES_PER_SUBCRQ:
4398 adapter->min_tx_entries_per_subcrq =
4399 be64_to_cpu(crq->query_capability.number);
4400 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4401 adapter->min_tx_entries_per_subcrq);
4403 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4404 adapter->min_rx_add_entries_per_subcrq =
4405 be64_to_cpu(crq->query_capability.number);
4406 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4407 adapter->min_rx_add_entries_per_subcrq);
4409 case MAX_TX_ENTRIES_PER_SUBCRQ:
4410 adapter->max_tx_entries_per_subcrq =
4411 be64_to_cpu(crq->query_capability.number);
4412 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4413 adapter->max_tx_entries_per_subcrq);
4415 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4416 adapter->max_rx_add_entries_per_subcrq =
4417 be64_to_cpu(crq->query_capability.number);
4418 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4419 adapter->max_rx_add_entries_per_subcrq);
4421 case TCP_IP_OFFLOAD:
4422 adapter->tcp_ip_offload =
4423 be64_to_cpu(crq->query_capability.number);
4424 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4425 adapter->tcp_ip_offload);
4427 case PROMISC_SUPPORTED:
4428 adapter->promisc_supported =
4429 be64_to_cpu(crq->query_capability.number);
4430 netdev_dbg(netdev, "promisc_supported = %lld\n",
4431 adapter->promisc_supported);
4434 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4435 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4436 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4439 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4440 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4441 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4443 case MAX_MULTICAST_FILTERS:
4444 adapter->max_multicast_filters =
4445 be64_to_cpu(crq->query_capability.number);
4446 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4447 adapter->max_multicast_filters);
4449 case VLAN_HEADER_INSERTION:
4450 adapter->vlan_header_insertion =
4451 be64_to_cpu(crq->query_capability.number);
4452 if (adapter->vlan_header_insertion)
4453 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4454 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4455 adapter->vlan_header_insertion);
4457 case RX_VLAN_HEADER_INSERTION:
4458 adapter->rx_vlan_header_insertion =
4459 be64_to_cpu(crq->query_capability.number);
4460 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4461 adapter->rx_vlan_header_insertion);
4463 case MAX_TX_SG_ENTRIES:
4464 adapter->max_tx_sg_entries =
4465 be64_to_cpu(crq->query_capability.number);
4466 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4467 adapter->max_tx_sg_entries);
4469 case RX_SG_SUPPORTED:
4470 adapter->rx_sg_supported =
4471 be64_to_cpu(crq->query_capability.number);
4472 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4473 adapter->rx_sg_supported);
4475 case OPT_TX_COMP_SUB_QUEUES:
4476 adapter->opt_tx_comp_sub_queues =
4477 be64_to_cpu(crq->query_capability.number);
4478 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4479 adapter->opt_tx_comp_sub_queues);
4481 case OPT_RX_COMP_QUEUES:
4482 adapter->opt_rx_comp_queues =
4483 be64_to_cpu(crq->query_capability.number);
4484 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4485 adapter->opt_rx_comp_queues);
4487 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4488 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4489 be64_to_cpu(crq->query_capability.number);
4490 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4491 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4493 case OPT_TX_ENTRIES_PER_SUBCRQ:
4494 adapter->opt_tx_entries_per_subcrq =
4495 be64_to_cpu(crq->query_capability.number);
4496 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4497 adapter->opt_tx_entries_per_subcrq);
4499 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4500 adapter->opt_rxba_entries_per_subcrq =
4501 be64_to_cpu(crq->query_capability.number);
4502 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4503 adapter->opt_rxba_entries_per_subcrq);
4505 case TX_RX_DESC_REQ:
4506 adapter->tx_rx_desc_req = crq->query_capability.number;
4507 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4508 adapter->tx_rx_desc_req);
4512 netdev_err(netdev, "Got invalid cap rsp %d\n",
4513 crq->query_capability.capability);
4517 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4518 adapter->wait_capability = false;
4519 ibmvnic_send_req_caps(adapter, 0);
4523 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4525 union ibmvnic_crq crq;
4528 memset(&crq, 0, sizeof(crq));
4529 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4530 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4532 mutex_lock(&adapter->fw_lock);
4533 adapter->fw_done_rc = 0;
4534 reinit_completion(&adapter->fw_done);
4536 rc = ibmvnic_send_crq(adapter, &crq);
4538 mutex_unlock(&adapter->fw_lock);
4542 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4544 mutex_unlock(&adapter->fw_lock);
4548 mutex_unlock(&adapter->fw_lock);
4549 return adapter->fw_done_rc ? -EIO : 0;
4552 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4553 struct ibmvnic_adapter *adapter)
4555 struct net_device *netdev = adapter->netdev;
4557 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
4559 rc = crq->query_phys_parms_rsp.rc.code;
4561 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4565 case IBMVNIC_10MBPS:
4566 adapter->speed = SPEED_10;
4568 case IBMVNIC_100MBPS:
4569 adapter->speed = SPEED_100;
4572 adapter->speed = SPEED_1000;
4575 adapter->speed = SPEED_10000;
4577 case IBMVNIC_25GBPS:
4578 adapter->speed = SPEED_25000;
4580 case IBMVNIC_40GBPS:
4581 adapter->speed = SPEED_40000;
4583 case IBMVNIC_50GBPS:
4584 adapter->speed = SPEED_50000;
4586 case IBMVNIC_100GBPS:
4587 adapter->speed = SPEED_100000;
4590 if (netif_carrier_ok(netdev))
4591 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
4592 adapter->speed = SPEED_UNKNOWN;
4594 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4595 adapter->duplex = DUPLEX_FULL;
4596 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4597 adapter->duplex = DUPLEX_HALF;
4599 adapter->duplex = DUPLEX_UNKNOWN;
4604 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4605 struct ibmvnic_adapter *adapter)
4607 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4608 struct net_device *netdev = adapter->netdev;
4609 struct device *dev = &adapter->vdev->dev;
4610 u64 *u64_crq = (u64 *)crq;
4613 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4614 (unsigned long int)cpu_to_be64(u64_crq[0]),
4615 (unsigned long int)cpu_to_be64(u64_crq[1]));
4616 switch (gen_crq->first) {
4617 case IBMVNIC_CRQ_INIT_RSP:
4618 switch (gen_crq->cmd) {
4619 case IBMVNIC_CRQ_INIT:
4620 dev_info(dev, "Partner initialized\n");
4621 adapter->from_passive_init = true;
4622 adapter->failover_pending = false;
4623 if (!completion_done(&adapter->init_done)) {
4624 complete(&adapter->init_done);
4625 adapter->init_done_rc = -EIO;
4627 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4629 case IBMVNIC_CRQ_INIT_COMPLETE:
4630 dev_info(dev, "Partner initialization complete\n");
4631 adapter->crq.active = true;
4632 send_version_xchg(adapter);
4635 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4638 case IBMVNIC_CRQ_XPORT_EVENT:
4639 netif_carrier_off(netdev);
4640 adapter->crq.active = false;
4641 /* terminate any thread waiting for a response
4644 if (!completion_done(&adapter->fw_done)) {
4645 adapter->fw_done_rc = -EIO;
4646 complete(&adapter->fw_done);
4648 if (!completion_done(&adapter->stats_done))
4649 complete(&adapter->stats_done);
4650 if (test_bit(0, &adapter->resetting))
4651 adapter->force_reset_recovery = true;
4652 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4653 dev_info(dev, "Migrated, re-enabling adapter\n");
4654 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4655 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4656 dev_info(dev, "Backing device failover detected\n");
4657 adapter->failover_pending = true;
4659 /* The adapter lost the connection */
4660 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4662 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4665 case IBMVNIC_CRQ_CMD_RSP:
4668 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4673 switch (gen_crq->cmd) {
4674 case VERSION_EXCHANGE_RSP:
4675 rc = crq->version_exchange_rsp.rc.code;
4677 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4680 dev_info(dev, "Partner protocol version is %d\n",
4681 crq->version_exchange_rsp.version);
4682 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4685 be16_to_cpu(crq->version_exchange_rsp.version);
4686 send_cap_queries(adapter);
4688 case QUERY_CAPABILITY_RSP:
4689 handle_query_cap_rsp(crq, adapter);
4692 handle_query_map_rsp(crq, adapter);
4694 case REQUEST_MAP_RSP:
4695 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4696 complete(&adapter->fw_done);
4698 case REQUEST_UNMAP_RSP:
4699 handle_request_unmap_rsp(crq, adapter);
4701 case REQUEST_CAPABILITY_RSP:
4702 handle_request_cap_rsp(crq, adapter);
4705 netdev_dbg(netdev, "Got Login Response\n");
4706 handle_login_rsp(crq, adapter);
4708 case LOGICAL_LINK_STATE_RSP:
4710 "Got Logical Link State Response, state: %d rc: %d\n",
4711 crq->logical_link_state_rsp.link_state,
4712 crq->logical_link_state_rsp.rc.code);
4713 adapter->logical_link_state =
4714 crq->logical_link_state_rsp.link_state;
4715 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4716 complete(&adapter->init_done);
4718 case LINK_STATE_INDICATION:
4719 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4720 adapter->phys_link_state =
4721 crq->link_state_indication.phys_link_state;
4722 adapter->logical_link_state =
4723 crq->link_state_indication.logical_link_state;
4724 if (adapter->phys_link_state && adapter->logical_link_state)
4725 netif_carrier_on(netdev);
4727 netif_carrier_off(netdev);
4729 case CHANGE_MAC_ADDR_RSP:
4730 netdev_dbg(netdev, "Got MAC address change Response\n");
4731 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4733 case ERROR_INDICATION:
4734 netdev_dbg(netdev, "Got Error Indication\n");
4735 handle_error_indication(crq, adapter);
4737 case REQUEST_STATISTICS_RSP:
4738 netdev_dbg(netdev, "Got Statistics Response\n");
4739 complete(&adapter->stats_done);
4741 case QUERY_IP_OFFLOAD_RSP:
4742 netdev_dbg(netdev, "Got Query IP offload Response\n");
4743 handle_query_ip_offload_rsp(adapter);
4745 case MULTICAST_CTRL_RSP:
4746 netdev_dbg(netdev, "Got multicast control Response\n");
4748 case CONTROL_IP_OFFLOAD_RSP:
4749 netdev_dbg(netdev, "Got Control IP offload Response\n");
4750 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4751 sizeof(adapter->ip_offload_ctrl),
4753 complete(&adapter->init_done);
4755 case COLLECT_FW_TRACE_RSP:
4756 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4757 complete(&adapter->fw_done);
4759 case GET_VPD_SIZE_RSP:
4760 handle_vpd_size_rsp(crq, adapter);
4763 handle_vpd_rsp(crq, adapter);
4765 case QUERY_PHYS_PARMS_RSP:
4766 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
4767 complete(&adapter->fw_done);
4770 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4775 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4777 struct ibmvnic_adapter *adapter = instance;
4779 tasklet_schedule(&adapter->tasklet);
4783 static void ibmvnic_tasklet(void *data)
4785 struct ibmvnic_adapter *adapter = data;
4786 struct ibmvnic_crq_queue *queue = &adapter->crq;
4787 union ibmvnic_crq *crq;
4788 unsigned long flags;
4791 spin_lock_irqsave(&queue->lock, flags);
4793 /* Pull all the valid messages off the CRQ */
4794 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4795 ibmvnic_handle_crq(crq, adapter);
4796 crq->generic.first = 0;
4799 /* remain in tasklet until all
4800 * capabilities responses are received
4802 if (!adapter->wait_capability)
4805 /* if capabilities CRQ's were sent in this tasklet, the following
4806 * tasklet must wait until all responses are received
4808 if (atomic_read(&adapter->running_cap_crqs) != 0)
4809 adapter->wait_capability = true;
4810 spin_unlock_irqrestore(&queue->lock, flags);
4813 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4815 struct vio_dev *vdev = adapter->vdev;
4819 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4820 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4823 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4828 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4830 struct ibmvnic_crq_queue *crq = &adapter->crq;
4831 struct device *dev = &adapter->vdev->dev;
4832 struct vio_dev *vdev = adapter->vdev;
4837 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4838 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4840 /* Clean out the queue */
4841 memset(crq->msgs, 0, PAGE_SIZE);
4843 crq->active = false;
4845 /* And re-open it again */
4846 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4847 crq->msg_token, PAGE_SIZE);
4850 /* Adapter is good, but other end is not ready */
4851 dev_warn(dev, "Partner adapter not ready\n");
4853 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4858 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4860 struct ibmvnic_crq_queue *crq = &adapter->crq;
4861 struct vio_dev *vdev = adapter->vdev;
4867 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4868 free_irq(vdev->irq, adapter);
4869 tasklet_kill(&adapter->tasklet);
4871 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4872 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4874 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4876 free_page((unsigned long)crq->msgs);
4878 crq->active = false;
4881 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4883 struct ibmvnic_crq_queue *crq = &adapter->crq;
4884 struct device *dev = &adapter->vdev->dev;
4885 struct vio_dev *vdev = adapter->vdev;
4886 int rc, retrc = -ENOMEM;
4891 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4892 /* Should we allocate more than one page? */
4897 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4898 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4900 if (dma_mapping_error(dev, crq->msg_token))
4903 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4904 crq->msg_token, PAGE_SIZE);
4906 if (rc == H_RESOURCE)
4907 /* maybe kexecing and resource is busy. try a reset */
4908 rc = ibmvnic_reset_crq(adapter);
4911 if (rc == H_CLOSED) {
4912 dev_warn(dev, "Partner adapter not ready\n");
4914 dev_warn(dev, "Error %d opening adapter\n", rc);
4915 goto reg_crq_failed;
4920 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4921 (unsigned long)adapter);
4923 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4924 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
4925 adapter->vdev->unit_address);
4926 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
4928 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4930 goto req_irq_failed;
4933 rc = vio_enable_interrupts(vdev);
4935 dev_err(dev, "Error %d enabling interrupts\n", rc);
4936 goto req_irq_failed;
4940 spin_lock_init(&crq->lock);
4945 tasklet_kill(&adapter->tasklet);
4947 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4948 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4950 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4952 free_page((unsigned long)crq->msgs);
4957 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4959 struct device *dev = &adapter->vdev->dev;
4960 unsigned long timeout = msecs_to_jiffies(30000);
4961 u64 old_num_rx_queues, old_num_tx_queues;
4964 adapter->from_passive_init = false;
4966 old_num_rx_queues = adapter->req_rx_queues;
4967 old_num_tx_queues = adapter->req_tx_queues;
4969 reinit_completion(&adapter->init_done);
4970 adapter->init_done_rc = 0;
4971 ibmvnic_send_crq_init(adapter);
4972 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4973 dev_err(dev, "Initialization sequence timed out\n");
4977 if (adapter->init_done_rc) {
4978 release_crq_queue(adapter);
4979 return adapter->init_done_rc;
4982 if (adapter->from_passive_init) {
4983 adapter->state = VNIC_OPEN;
4984 adapter->from_passive_init = false;
4988 if (test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
4989 adapter->reset_reason != VNIC_RESET_MOBILITY) {
4990 if (adapter->req_rx_queues != old_num_rx_queues ||
4991 adapter->req_tx_queues != old_num_tx_queues) {
4992 release_sub_crqs(adapter, 0);
4993 rc = init_sub_crqs(adapter);
4995 rc = reset_sub_crq_queues(adapter);
4998 rc = init_sub_crqs(adapter);
5002 dev_err(dev, "Initialization of sub crqs failed\n");
5003 release_crq_queue(adapter);
5007 rc = init_sub_crq_irqs(adapter);
5009 dev_err(dev, "Failed to initialize sub crq irqs\n");
5010 release_crq_queue(adapter);
5016 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
5018 struct device *dev = &adapter->vdev->dev;
5019 unsigned long timeout = msecs_to_jiffies(30000);
5022 adapter->from_passive_init = false;
5024 adapter->init_done_rc = 0;
5025 ibmvnic_send_crq_init(adapter);
5026 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5027 dev_err(dev, "Initialization sequence timed out\n");
5031 if (adapter->init_done_rc) {
5032 release_crq_queue(adapter);
5033 return adapter->init_done_rc;
5036 if (adapter->from_passive_init) {
5037 adapter->state = VNIC_OPEN;
5038 adapter->from_passive_init = false;
5042 rc = init_sub_crqs(adapter);
5044 dev_err(dev, "Initialization of sub crqs failed\n");
5045 release_crq_queue(adapter);
5049 rc = init_sub_crq_irqs(adapter);
5051 dev_err(dev, "Failed to initialize sub crq irqs\n");
5052 release_crq_queue(adapter);
5058 static struct device_attribute dev_attr_failover;
5060 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5062 struct ibmvnic_adapter *adapter;
5063 struct net_device *netdev;
5064 unsigned char *mac_addr_p;
5067 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5070 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5071 VETH_MAC_ADDR, NULL);
5074 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5075 __FILE__, __LINE__);
5079 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5080 IBMVNIC_MAX_QUEUES);
5084 adapter = netdev_priv(netdev);
5085 adapter->state = VNIC_PROBING;
5086 dev_set_drvdata(&dev->dev, netdev);
5087 adapter->vdev = dev;
5088 adapter->netdev = netdev;
5090 ether_addr_copy(adapter->mac_addr, mac_addr_p);
5091 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5092 netdev->irq = dev->irq;
5093 netdev->netdev_ops = &ibmvnic_netdev_ops;
5094 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5095 SET_NETDEV_DEV(netdev, &dev->dev);
5097 spin_lock_init(&adapter->stats_lock);
5099 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5100 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5101 __ibmvnic_delayed_reset);
5102 INIT_LIST_HEAD(&adapter->rwi_list);
5103 spin_lock_init(&adapter->rwi_lock);
5104 spin_lock_init(&adapter->state_lock);
5105 mutex_init(&adapter->fw_lock);
5106 init_completion(&adapter->init_done);
5107 init_completion(&adapter->fw_done);
5108 init_completion(&adapter->reset_done);
5109 init_completion(&adapter->stats_done);
5110 clear_bit(0, &adapter->resetting);
5113 rc = init_crq_queue(adapter);
5115 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5117 goto ibmvnic_init_fail;
5120 rc = ibmvnic_init(adapter);
5121 if (rc && rc != EAGAIN)
5122 goto ibmvnic_init_fail;
5123 } while (rc == EAGAIN);
5125 rc = init_stats_buffers(adapter);
5127 goto ibmvnic_init_fail;
5129 rc = init_stats_token(adapter);
5131 goto ibmvnic_stats_fail;
5133 netdev->mtu = adapter->req_mtu - ETH_HLEN;
5134 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5135 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5137 rc = device_create_file(&dev->dev, &dev_attr_failover);
5139 goto ibmvnic_dev_file_err;
5141 netif_carrier_off(netdev);
5142 rc = register_netdev(netdev);
5144 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5145 goto ibmvnic_register_fail;
5147 dev_info(&dev->dev, "ibmvnic registered\n");
5149 adapter->state = VNIC_PROBED;
5151 adapter->wait_for_reset = false;
5155 ibmvnic_register_fail:
5156 device_remove_file(&dev->dev, &dev_attr_failover);
5158 ibmvnic_dev_file_err:
5159 release_stats_token(adapter);
5162 release_stats_buffers(adapter);
5165 release_sub_crqs(adapter, 1);
5166 release_crq_queue(adapter);
5167 mutex_destroy(&adapter->fw_lock);
5168 free_netdev(netdev);
5173 static int ibmvnic_remove(struct vio_dev *dev)
5175 struct net_device *netdev = dev_get_drvdata(&dev->dev);
5176 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5177 unsigned long flags;
5179 spin_lock_irqsave(&adapter->state_lock, flags);
5180 if (adapter->state == VNIC_RESETTING) {
5181 spin_unlock_irqrestore(&adapter->state_lock, flags);
5185 adapter->state = VNIC_REMOVING;
5186 spin_unlock_irqrestore(&adapter->state_lock, flags);
5189 unregister_netdevice(netdev);
5191 release_resources(adapter);
5192 release_sub_crqs(adapter, 1);
5193 release_crq_queue(adapter);
5195 release_stats_token(adapter);
5196 release_stats_buffers(adapter);
5198 adapter->state = VNIC_REMOVED;
5201 mutex_destroy(&adapter->fw_lock);
5202 device_remove_file(&dev->dev, &dev_attr_failover);
5203 free_netdev(netdev);
5204 dev_set_drvdata(&dev->dev, NULL);
5209 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5210 const char *buf, size_t count)
5212 struct net_device *netdev = dev_get_drvdata(dev);
5213 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5214 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5215 __be64 session_token;
5218 if (!sysfs_streq(buf, "1"))
5221 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5222 H_GET_SESSION_TOKEN, 0, 0, 0);
5224 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5229 session_token = (__be64)retbuf[0];
5230 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5231 be64_to_cpu(session_token));
5232 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5233 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5235 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
5243 static DEVICE_ATTR_WO(failover);
5245 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5247 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5248 struct ibmvnic_adapter *adapter;
5249 struct iommu_table *tbl;
5250 unsigned long ret = 0;
5253 tbl = get_iommu_table_base(&vdev->dev);
5255 /* netdev inits at probe time along with the structures we need below*/
5257 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5259 adapter = netdev_priv(netdev);
5261 ret += PAGE_SIZE; /* the crq message queue */
5262 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5264 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5265 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5267 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
5269 ret += adapter->rx_pool[i].size *
5270 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5275 static int ibmvnic_resume(struct device *dev)
5277 struct net_device *netdev = dev_get_drvdata(dev);
5278 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5280 if (adapter->state != VNIC_OPEN)
5283 tasklet_schedule(&adapter->tasklet);
5288 static const struct vio_device_id ibmvnic_device_table[] = {
5289 {"network", "IBM,vnic"},
5292 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5294 static const struct dev_pm_ops ibmvnic_pm_ops = {
5295 .resume = ibmvnic_resume
5298 static struct vio_driver ibmvnic_driver = {
5299 .id_table = ibmvnic_device_table,
5300 .probe = ibmvnic_probe,
5301 .remove = ibmvnic_remove,
5302 .get_desired_dma = ibmvnic_get_desired_dma,
5303 .name = ibmvnic_driver_name,
5304 .pm = &ibmvnic_pm_ops,
5307 /* module functions */
5308 static int __init ibmvnic_module_init(void)
5310 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5311 IBMVNIC_DRIVER_VERSION);
5313 return vio_register_driver(&ibmvnic_driver);
5316 static void __exit ibmvnic_module_exit(void)
5318 vio_unregister_driver(&ibmvnic_driver);
5321 module_init(ibmvnic_module_init);
5322 module_exit(ibmvnic_module_exit);