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 void release_sub_crqs(struct ibmvnic_adapter *, bool);
82 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
83 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
84 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
85 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
86 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
87 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
88 static int enable_scrq_irq(struct ibmvnic_adapter *,
89 struct ibmvnic_sub_crq_queue *);
90 static int disable_scrq_irq(struct ibmvnic_adapter *,
91 struct ibmvnic_sub_crq_queue *);
92 static int pending_scrq(struct ibmvnic_adapter *,
93 struct ibmvnic_sub_crq_queue *);
94 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
95 struct ibmvnic_sub_crq_queue *);
96 static int ibmvnic_poll(struct napi_struct *napi, int data);
97 static void send_query_map(struct ibmvnic_adapter *adapter);
98 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
99 static int send_request_unmap(struct ibmvnic_adapter *, u8);
100 static int send_login(struct ibmvnic_adapter *adapter);
101 static void send_query_cap(struct ibmvnic_adapter *adapter);
102 static int init_sub_crqs(struct ibmvnic_adapter *);
103 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
104 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset);
105 static void release_crq_queue(struct ibmvnic_adapter *);
106 static int __ibmvnic_set_mac(struct net_device *, u8 *);
107 static int init_crq_queue(struct ibmvnic_adapter *adapter);
108 static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
110 struct ibmvnic_stat {
111 char name[ETH_GSTRING_LEN];
115 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
116 offsetof(struct ibmvnic_statistics, stat))
117 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off))))
119 static const struct ibmvnic_stat ibmvnic_stats[] = {
120 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
121 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
122 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
123 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
124 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
125 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
126 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
127 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
128 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
129 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
130 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
131 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
132 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
133 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
134 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
135 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
136 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
137 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
138 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
139 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
140 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
141 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
144 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
145 unsigned long length, unsigned long *number,
148 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
151 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
159 * ibmvnic_wait_for_completion - Check device state and wait for completion
160 * @adapter: private device data
161 * @comp_done: completion structure to wait for
162 * @timeout: time to wait in milliseconds
164 * Wait for a completion signal or until the timeout limit is reached
165 * while checking that the device is still active.
167 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
168 struct completion *comp_done,
169 unsigned long timeout)
171 struct net_device *netdev;
172 unsigned long div_timeout;
175 netdev = adapter->netdev;
177 div_timeout = msecs_to_jiffies(timeout / retry);
179 if (!adapter->crq.active) {
180 netdev_err(netdev, "Device down!\n");
185 if (wait_for_completion_timeout(comp_done, div_timeout))
188 netdev_err(netdev, "Operation timed out.\n");
192 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
193 struct ibmvnic_long_term_buff *ltb, int size)
195 struct device *dev = &adapter->vdev->dev;
199 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
203 dev_err(dev, "Couldn't alloc long term buffer\n");
206 ltb->map_id = adapter->map_id;
209 mutex_lock(&adapter->fw_lock);
210 adapter->fw_done_rc = 0;
211 reinit_completion(&adapter->fw_done);
212 rc = send_request_map(adapter, ltb->addr,
213 ltb->size, ltb->map_id);
215 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
216 mutex_unlock(&adapter->fw_lock);
220 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
223 "Long term map request aborted or timed out,rc = %d\n",
225 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
226 mutex_unlock(&adapter->fw_lock);
230 if (adapter->fw_done_rc) {
231 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
232 adapter->fw_done_rc);
233 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
234 mutex_unlock(&adapter->fw_lock);
237 mutex_unlock(&adapter->fw_lock);
241 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
242 struct ibmvnic_long_term_buff *ltb)
244 struct device *dev = &adapter->vdev->dev;
249 /* VIOS automatically unmaps the long term buffer at remote
250 * end for the following resets:
251 * FAILOVER, MOBILITY, TIMEOUT.
253 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
254 adapter->reset_reason != VNIC_RESET_MOBILITY &&
255 adapter->reset_reason != VNIC_RESET_TIMEOUT)
256 send_request_unmap(adapter, ltb->map_id);
257 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
260 static int reset_long_term_buff(struct ibmvnic_long_term_buff *ltb)
265 memset(ltb->buff, 0, ltb->size);
269 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
273 for (i = 0; i < adapter->num_active_rx_pools; i++)
274 adapter->rx_pool[i].active = 0;
277 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
278 struct ibmvnic_rx_pool *pool)
280 int count = pool->size - atomic_read(&pool->available);
281 u64 handle = adapter->rx_scrq[pool->index]->handle;
282 struct device *dev = &adapter->vdev->dev;
283 struct ibmvnic_ind_xmit_queue *ind_bufp;
284 struct ibmvnic_sub_crq_queue *rx_scrq;
285 union sub_crq *sub_crq;
286 int buffers_added = 0;
287 unsigned long lpar_rc;
299 rx_scrq = adapter->rx_scrq[pool->index];
300 ind_bufp = &rx_scrq->ind_buf;
301 for (i = 0; i < count; ++i) {
302 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
304 dev_err(dev, "Couldn't replenish rx buff\n");
305 adapter->replenish_no_mem++;
309 index = pool->free_map[pool->next_free];
311 if (pool->rx_buff[index].skb)
312 dev_err(dev, "Inconsistent free_map!\n");
314 /* Copy the skb to the long term mapped DMA buffer */
315 offset = index * pool->buff_size;
316 dst = pool->long_term_buff.buff + offset;
317 memset(dst, 0, pool->buff_size);
318 dma_addr = pool->long_term_buff.addr + offset;
319 pool->rx_buff[index].data = dst;
321 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
322 pool->rx_buff[index].dma = dma_addr;
323 pool->rx_buff[index].skb = skb;
324 pool->rx_buff[index].pool_index = pool->index;
325 pool->rx_buff[index].size = pool->buff_size;
327 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++];
328 memset(sub_crq, 0, sizeof(*sub_crq));
329 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD;
330 sub_crq->rx_add.correlator =
331 cpu_to_be64((u64)&pool->rx_buff[index]);
332 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr);
333 sub_crq->rx_add.map_id = pool->long_term_buff.map_id;
335 /* The length field of the sCRQ is defined to be 24 bits so the
336 * buffer size needs to be left shifted by a byte before it is
337 * converted to big endian to prevent the last byte from being
340 #ifdef __LITTLE_ENDIAN__
343 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift);
344 pool->next_free = (pool->next_free + 1) % pool->size;
345 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS ||
348 send_subcrq_indirect(adapter, handle,
349 (u64)ind_bufp->indir_dma,
350 (u64)ind_bufp->index);
351 if (lpar_rc != H_SUCCESS)
353 buffers_added += ind_bufp->index;
354 adapter->replenish_add_buff_success += ind_bufp->index;
358 atomic_add(buffers_added, &pool->available);
362 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
363 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
364 for (i = ind_bufp->index - 1; i >= 0; --i) {
365 struct ibmvnic_rx_buff *rx_buff;
367 pool->next_free = pool->next_free == 0 ?
368 pool->size - 1 : pool->next_free - 1;
369 sub_crq = &ind_bufp->indir_arr[i];
370 rx_buff = (struct ibmvnic_rx_buff *)
371 be64_to_cpu(sub_crq->rx_add.correlator);
372 index = (int)(rx_buff - pool->rx_buff);
373 pool->free_map[pool->next_free] = index;
374 dev_kfree_skb_any(pool->rx_buff[index].skb);
375 pool->rx_buff[index].skb = NULL;
377 adapter->replenish_add_buff_failure += ind_bufp->index;
378 atomic_add(buffers_added, &pool->available);
380 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
381 /* Disable buffer pool replenishment and report carrier off if
382 * queue is closed or pending failover.
383 * Firmware guarantees that a signal will be sent to the
384 * driver, triggering a reset.
386 deactivate_rx_pools(adapter);
387 netif_carrier_off(adapter->netdev);
391 static void replenish_pools(struct ibmvnic_adapter *adapter)
395 adapter->replenish_task_cycles++;
396 for (i = 0; i < adapter->num_active_rx_pools; i++) {
397 if (adapter->rx_pool[i].active)
398 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
401 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i);
404 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
406 kfree(adapter->tx_stats_buffers);
407 kfree(adapter->rx_stats_buffers);
408 adapter->tx_stats_buffers = NULL;
409 adapter->rx_stats_buffers = NULL;
412 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
414 adapter->tx_stats_buffers =
415 kcalloc(IBMVNIC_MAX_QUEUES,
416 sizeof(struct ibmvnic_tx_queue_stats),
418 if (!adapter->tx_stats_buffers)
421 adapter->rx_stats_buffers =
422 kcalloc(IBMVNIC_MAX_QUEUES,
423 sizeof(struct ibmvnic_rx_queue_stats),
425 if (!adapter->rx_stats_buffers)
431 static void release_stats_token(struct ibmvnic_adapter *adapter)
433 struct device *dev = &adapter->vdev->dev;
435 if (!adapter->stats_token)
438 dma_unmap_single(dev, adapter->stats_token,
439 sizeof(struct ibmvnic_statistics),
441 adapter->stats_token = 0;
444 static int init_stats_token(struct ibmvnic_adapter *adapter)
446 struct device *dev = &adapter->vdev->dev;
449 stok = dma_map_single(dev, &adapter->stats,
450 sizeof(struct ibmvnic_statistics),
452 if (dma_mapping_error(dev, stok)) {
453 dev_err(dev, "Couldn't map stats buffer\n");
457 adapter->stats_token = stok;
458 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
462 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
464 struct ibmvnic_rx_pool *rx_pool;
469 if (!adapter->rx_pool)
472 buff_size = adapter->cur_rx_buf_sz;
473 rx_scrqs = adapter->num_active_rx_pools;
474 for (i = 0; i < rx_scrqs; i++) {
475 rx_pool = &adapter->rx_pool[i];
477 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
479 if (rx_pool->buff_size != buff_size) {
480 free_long_term_buff(adapter, &rx_pool->long_term_buff);
481 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
482 rc = alloc_long_term_buff(adapter,
483 &rx_pool->long_term_buff,
487 rc = reset_long_term_buff(&rx_pool->long_term_buff);
493 for (j = 0; j < rx_pool->size; j++)
494 rx_pool->free_map[j] = j;
496 memset(rx_pool->rx_buff, 0,
497 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
499 atomic_set(&rx_pool->available, 0);
500 rx_pool->next_alloc = 0;
501 rx_pool->next_free = 0;
508 static void release_rx_pools(struct ibmvnic_adapter *adapter)
510 struct ibmvnic_rx_pool *rx_pool;
513 if (!adapter->rx_pool)
516 for (i = 0; i < adapter->num_active_rx_pools; i++) {
517 rx_pool = &adapter->rx_pool[i];
519 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
521 kfree(rx_pool->free_map);
522 free_long_term_buff(adapter, &rx_pool->long_term_buff);
524 if (!rx_pool->rx_buff)
527 for (j = 0; j < rx_pool->size; j++) {
528 if (rx_pool->rx_buff[j].skb) {
529 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
530 rx_pool->rx_buff[j].skb = NULL;
534 kfree(rx_pool->rx_buff);
537 kfree(adapter->rx_pool);
538 adapter->rx_pool = NULL;
539 adapter->num_active_rx_pools = 0;
542 static int init_rx_pools(struct net_device *netdev)
544 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
545 struct device *dev = &adapter->vdev->dev;
546 struct ibmvnic_rx_pool *rx_pool;
551 rxadd_subcrqs = adapter->num_active_rx_scrqs;
552 buff_size = adapter->cur_rx_buf_sz;
554 adapter->rx_pool = kcalloc(rxadd_subcrqs,
555 sizeof(struct ibmvnic_rx_pool),
557 if (!adapter->rx_pool) {
558 dev_err(dev, "Failed to allocate rx pools\n");
562 adapter->num_active_rx_pools = rxadd_subcrqs;
564 for (i = 0; i < rxadd_subcrqs; i++) {
565 rx_pool = &adapter->rx_pool[i];
567 netdev_dbg(adapter->netdev,
568 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
569 i, adapter->req_rx_add_entries_per_subcrq,
572 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
574 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
577 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
579 if (!rx_pool->free_map) {
580 release_rx_pools(adapter);
584 rx_pool->rx_buff = kcalloc(rx_pool->size,
585 sizeof(struct ibmvnic_rx_buff),
587 if (!rx_pool->rx_buff) {
588 dev_err(dev, "Couldn't alloc rx buffers\n");
589 release_rx_pools(adapter);
593 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
594 rx_pool->size * rx_pool->buff_size)) {
595 release_rx_pools(adapter);
599 for (j = 0; j < rx_pool->size; ++j)
600 rx_pool->free_map[j] = j;
602 atomic_set(&rx_pool->available, 0);
603 rx_pool->next_alloc = 0;
604 rx_pool->next_free = 0;
610 static int reset_one_tx_pool(struct ibmvnic_tx_pool *tx_pool)
614 rc = reset_long_term_buff(&tx_pool->long_term_buff);
618 memset(tx_pool->tx_buff, 0,
619 tx_pool->num_buffers *
620 sizeof(struct ibmvnic_tx_buff));
622 for (i = 0; i < tx_pool->num_buffers; i++)
623 tx_pool->free_map[i] = i;
625 tx_pool->consumer_index = 0;
626 tx_pool->producer_index = 0;
631 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
636 if (!adapter->tx_pool)
639 tx_scrqs = adapter->num_active_tx_pools;
640 for (i = 0; i < tx_scrqs; i++) {
641 rc = reset_one_tx_pool(&adapter->tso_pool[i]);
644 rc = reset_one_tx_pool(&adapter->tx_pool[i]);
652 static void release_vpd_data(struct ibmvnic_adapter *adapter)
657 kfree(adapter->vpd->buff);
663 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
664 struct ibmvnic_tx_pool *tx_pool)
666 kfree(tx_pool->tx_buff);
667 kfree(tx_pool->free_map);
668 free_long_term_buff(adapter, &tx_pool->long_term_buff);
671 static void release_tx_pools(struct ibmvnic_adapter *adapter)
675 if (!adapter->tx_pool)
678 for (i = 0; i < adapter->num_active_tx_pools; i++) {
679 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
680 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
683 kfree(adapter->tx_pool);
684 adapter->tx_pool = NULL;
685 kfree(adapter->tso_pool);
686 adapter->tso_pool = NULL;
687 adapter->num_active_tx_pools = 0;
690 static int init_one_tx_pool(struct net_device *netdev,
691 struct ibmvnic_tx_pool *tx_pool,
692 int num_entries, int buf_size)
694 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
697 tx_pool->tx_buff = kcalloc(num_entries,
698 sizeof(struct ibmvnic_tx_buff),
700 if (!tx_pool->tx_buff)
703 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
704 num_entries * buf_size))
707 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
708 if (!tx_pool->free_map)
711 for (i = 0; i < num_entries; i++)
712 tx_pool->free_map[i] = i;
714 tx_pool->consumer_index = 0;
715 tx_pool->producer_index = 0;
716 tx_pool->num_buffers = num_entries;
717 tx_pool->buf_size = buf_size;
722 static int init_tx_pools(struct net_device *netdev)
724 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
729 tx_subcrqs = adapter->num_active_tx_scrqs;
730 adapter->tx_pool = kcalloc(tx_subcrqs,
731 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
732 if (!adapter->tx_pool)
735 adapter->tso_pool = kcalloc(tx_subcrqs,
736 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
737 if (!adapter->tso_pool)
740 adapter->num_active_tx_pools = tx_subcrqs;
742 for (i = 0; i < tx_subcrqs; i++) {
743 buff_size = adapter->req_mtu + VLAN_HLEN;
744 buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
745 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
746 adapter->req_tx_entries_per_subcrq,
749 release_tx_pools(adapter);
753 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
757 release_tx_pools(adapter);
765 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
769 if (adapter->napi_enabled)
772 for (i = 0; i < adapter->req_rx_queues; i++)
773 napi_enable(&adapter->napi[i]);
775 adapter->napi_enabled = true;
778 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
782 if (!adapter->napi_enabled)
785 for (i = 0; i < adapter->req_rx_queues; i++) {
786 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
787 napi_disable(&adapter->napi[i]);
790 adapter->napi_enabled = false;
793 static int init_napi(struct ibmvnic_adapter *adapter)
797 adapter->napi = kcalloc(adapter->req_rx_queues,
798 sizeof(struct napi_struct), GFP_KERNEL);
802 for (i = 0; i < adapter->req_rx_queues; i++) {
803 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
804 netif_napi_add(adapter->netdev, &adapter->napi[i],
805 ibmvnic_poll, NAPI_POLL_WEIGHT);
808 adapter->num_active_rx_napi = adapter->req_rx_queues;
812 static void release_napi(struct ibmvnic_adapter *adapter)
819 for (i = 0; i < adapter->num_active_rx_napi; i++) {
820 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
821 netif_napi_del(&adapter->napi[i]);
824 kfree(adapter->napi);
825 adapter->napi = NULL;
826 adapter->num_active_rx_napi = 0;
827 adapter->napi_enabled = false;
830 static int ibmvnic_login(struct net_device *netdev)
832 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
833 unsigned long timeout = msecs_to_jiffies(20000);
841 if (retry_count > retries) {
842 netdev_warn(netdev, "Login attempts exceeded\n");
846 adapter->init_done_rc = 0;
847 reinit_completion(&adapter->init_done);
848 rc = send_login(adapter);
852 if (!wait_for_completion_timeout(&adapter->init_done,
854 netdev_warn(netdev, "Login timed out, retrying...\n");
856 adapter->init_done_rc = 0;
861 if (adapter->init_done_rc == ABORTED) {
862 netdev_warn(netdev, "Login aborted, retrying...\n");
864 adapter->init_done_rc = 0;
866 /* FW or device may be busy, so
867 * wait a bit before retrying login
870 } else if (adapter->init_done_rc == PARTIALSUCCESS) {
872 release_sub_crqs(adapter, 1);
876 "Received partial success, retrying...\n");
877 adapter->init_done_rc = 0;
878 reinit_completion(&adapter->init_done);
879 send_query_cap(adapter);
880 if (!wait_for_completion_timeout(&adapter->init_done,
883 "Capabilities query timed out\n");
887 rc = init_sub_crqs(adapter);
890 "SCRQ initialization failed\n");
894 rc = init_sub_crq_irqs(adapter);
897 "SCRQ irq initialization failed\n");
900 } else if (adapter->init_done_rc) {
901 netdev_warn(netdev, "Adapter login failed\n");
906 __ibmvnic_set_mac(netdev, adapter->mac_addr);
908 netdev_dbg(netdev, "[S:%d] Login succeeded\n", adapter->state);
912 static void release_login_buffer(struct ibmvnic_adapter *adapter)
914 kfree(adapter->login_buf);
915 adapter->login_buf = NULL;
918 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
920 kfree(adapter->login_rsp_buf);
921 adapter->login_rsp_buf = NULL;
924 static void release_resources(struct ibmvnic_adapter *adapter)
926 release_vpd_data(adapter);
928 release_tx_pools(adapter);
929 release_rx_pools(adapter);
931 release_napi(adapter);
932 release_login_buffer(adapter);
933 release_login_rsp_buffer(adapter);
936 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
938 struct net_device *netdev = adapter->netdev;
939 unsigned long timeout = msecs_to_jiffies(20000);
940 union ibmvnic_crq crq;
944 netdev_dbg(netdev, "setting link state %d\n", link_state);
946 memset(&crq, 0, sizeof(crq));
947 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
948 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
949 crq.logical_link_state.link_state = link_state;
954 reinit_completion(&adapter->init_done);
955 rc = ibmvnic_send_crq(adapter, &crq);
957 netdev_err(netdev, "Failed to set link state\n");
961 if (!wait_for_completion_timeout(&adapter->init_done,
963 netdev_err(netdev, "timeout setting link state\n");
967 if (adapter->init_done_rc == PARTIALSUCCESS) {
968 /* Partuial success, delay and re-send */
971 } else if (adapter->init_done_rc) {
972 netdev_warn(netdev, "Unable to set link state, rc=%d\n",
973 adapter->init_done_rc);
974 return adapter->init_done_rc;
981 static int set_real_num_queues(struct net_device *netdev)
983 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
986 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
987 adapter->req_tx_queues, adapter->req_rx_queues);
989 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
991 netdev_err(netdev, "failed to set the number of tx queues\n");
995 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
997 netdev_err(netdev, "failed to set the number of rx queues\n");
1002 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1004 struct device *dev = &adapter->vdev->dev;
1005 union ibmvnic_crq crq;
1009 if (adapter->vpd->buff)
1010 len = adapter->vpd->len;
1012 mutex_lock(&adapter->fw_lock);
1013 adapter->fw_done_rc = 0;
1014 reinit_completion(&adapter->fw_done);
1016 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1017 crq.get_vpd_size.cmd = GET_VPD_SIZE;
1018 rc = ibmvnic_send_crq(adapter, &crq);
1020 mutex_unlock(&adapter->fw_lock);
1024 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1026 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1027 mutex_unlock(&adapter->fw_lock);
1030 mutex_unlock(&adapter->fw_lock);
1032 if (!adapter->vpd->len)
1035 if (!adapter->vpd->buff)
1036 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1037 else if (adapter->vpd->len != len)
1038 adapter->vpd->buff =
1039 krealloc(adapter->vpd->buff,
1040 adapter->vpd->len, GFP_KERNEL);
1042 if (!adapter->vpd->buff) {
1043 dev_err(dev, "Could allocate VPD buffer\n");
1047 adapter->vpd->dma_addr =
1048 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1050 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1051 dev_err(dev, "Could not map VPD buffer\n");
1052 kfree(adapter->vpd->buff);
1053 adapter->vpd->buff = NULL;
1057 mutex_lock(&adapter->fw_lock);
1058 adapter->fw_done_rc = 0;
1059 reinit_completion(&adapter->fw_done);
1061 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1062 crq.get_vpd.cmd = GET_VPD;
1063 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1064 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1065 rc = ibmvnic_send_crq(adapter, &crq);
1067 kfree(adapter->vpd->buff);
1068 adapter->vpd->buff = NULL;
1069 mutex_unlock(&adapter->fw_lock);
1073 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1075 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1076 kfree(adapter->vpd->buff);
1077 adapter->vpd->buff = NULL;
1078 mutex_unlock(&adapter->fw_lock);
1082 mutex_unlock(&adapter->fw_lock);
1086 static int init_resources(struct ibmvnic_adapter *adapter)
1088 struct net_device *netdev = adapter->netdev;
1091 rc = set_real_num_queues(netdev);
1095 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1099 /* Vital Product Data (VPD) */
1100 rc = ibmvnic_get_vpd(adapter);
1102 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1106 adapter->map_id = 1;
1108 rc = init_napi(adapter);
1112 send_query_map(adapter);
1114 rc = init_rx_pools(netdev);
1118 rc = init_tx_pools(netdev);
1122 static int __ibmvnic_open(struct net_device *netdev)
1124 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1125 enum vnic_state prev_state = adapter->state;
1128 adapter->state = VNIC_OPENING;
1129 replenish_pools(adapter);
1130 ibmvnic_napi_enable(adapter);
1132 /* We're ready to receive frames, enable the sub-crq interrupts and
1133 * set the logical link state to up
1135 for (i = 0; i < adapter->req_rx_queues; i++) {
1136 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1137 if (prev_state == VNIC_CLOSED)
1138 enable_irq(adapter->rx_scrq[i]->irq);
1139 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1142 for (i = 0; i < adapter->req_tx_queues; i++) {
1143 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1144 if (prev_state == VNIC_CLOSED)
1145 enable_irq(adapter->tx_scrq[i]->irq);
1146 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1147 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i));
1150 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1152 ibmvnic_napi_disable(adapter);
1153 release_resources(adapter);
1157 netif_tx_start_all_queues(netdev);
1159 if (prev_state == VNIC_CLOSED) {
1160 for (i = 0; i < adapter->req_rx_queues; i++)
1161 napi_schedule(&adapter->napi[i]);
1164 adapter->state = VNIC_OPEN;
1168 static int ibmvnic_open(struct net_device *netdev)
1170 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1175 /* If device failover is pending or we are about to reset, just set
1176 * device state and return. Device operation will be handled by reset
1179 * It should be safe to overwrite the adapter->state here. Since
1180 * we hold the rtnl, either the reset has not actually started or
1181 * the rtnl got dropped during the set_link_state() in do_reset().
1182 * In the former case, no one else is changing the state (again we
1183 * have the rtnl) and in the latter case, do_reset() will detect and
1184 * honor our setting below.
1186 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) {
1187 netdev_dbg(netdev, "[S:%d FOP:%d] Resetting, deferring open\n",
1188 adapter->state, adapter->failover_pending);
1189 adapter->state = VNIC_OPEN;
1194 if (adapter->state != VNIC_CLOSED) {
1195 rc = ibmvnic_login(netdev);
1199 rc = init_resources(adapter);
1201 netdev_err(netdev, "failed to initialize resources\n");
1202 release_resources(adapter);
1207 rc = __ibmvnic_open(netdev);
1210 /* If open failed and there is a pending failover or in-progress reset,
1211 * set device state and return. Device operation will be handled by
1212 * reset routine. See also comments above regarding rtnl.
1215 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) {
1216 adapter->state = VNIC_OPEN;
1222 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1224 struct ibmvnic_rx_pool *rx_pool;
1225 struct ibmvnic_rx_buff *rx_buff;
1230 if (!adapter->rx_pool)
1233 rx_scrqs = adapter->num_active_rx_pools;
1234 rx_entries = adapter->req_rx_add_entries_per_subcrq;
1236 /* Free any remaining skbs in the rx buffer pools */
1237 for (i = 0; i < rx_scrqs; i++) {
1238 rx_pool = &adapter->rx_pool[i];
1239 if (!rx_pool || !rx_pool->rx_buff)
1242 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1243 for (j = 0; j < rx_entries; j++) {
1244 rx_buff = &rx_pool->rx_buff[j];
1245 if (rx_buff && rx_buff->skb) {
1246 dev_kfree_skb_any(rx_buff->skb);
1247 rx_buff->skb = NULL;
1253 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1254 struct ibmvnic_tx_pool *tx_pool)
1256 struct ibmvnic_tx_buff *tx_buff;
1260 if (!tx_pool || !tx_pool->tx_buff)
1263 tx_entries = tx_pool->num_buffers;
1265 for (i = 0; i < tx_entries; i++) {
1266 tx_buff = &tx_pool->tx_buff[i];
1267 if (tx_buff && tx_buff->skb) {
1268 dev_kfree_skb_any(tx_buff->skb);
1269 tx_buff->skb = NULL;
1274 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1279 if (!adapter->tx_pool || !adapter->tso_pool)
1282 tx_scrqs = adapter->num_active_tx_pools;
1284 /* Free any remaining skbs in the tx buffer pools */
1285 for (i = 0; i < tx_scrqs; i++) {
1286 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1287 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1288 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1292 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1294 struct net_device *netdev = adapter->netdev;
1297 if (adapter->tx_scrq) {
1298 for (i = 0; i < adapter->req_tx_queues; i++)
1299 if (adapter->tx_scrq[i]->irq) {
1301 "Disabling tx_scrq[%d] irq\n", i);
1302 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1303 disable_irq(adapter->tx_scrq[i]->irq);
1307 if (adapter->rx_scrq) {
1308 for (i = 0; i < adapter->req_rx_queues; i++) {
1309 if (adapter->rx_scrq[i]->irq) {
1311 "Disabling rx_scrq[%d] irq\n", i);
1312 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1313 disable_irq(adapter->rx_scrq[i]->irq);
1319 static void ibmvnic_cleanup(struct net_device *netdev)
1321 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1323 /* ensure that transmissions are stopped if called by do_reset */
1324 if (test_bit(0, &adapter->resetting))
1325 netif_tx_disable(netdev);
1327 netif_tx_stop_all_queues(netdev);
1329 ibmvnic_napi_disable(adapter);
1330 ibmvnic_disable_irqs(adapter);
1332 clean_rx_pools(adapter);
1333 clean_tx_pools(adapter);
1336 static int __ibmvnic_close(struct net_device *netdev)
1338 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1341 adapter->state = VNIC_CLOSING;
1342 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1343 adapter->state = VNIC_CLOSED;
1347 static int ibmvnic_close(struct net_device *netdev)
1349 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1352 netdev_dbg(netdev, "[S:%d FOP:%d FRR:%d] Closing\n",
1353 adapter->state, adapter->failover_pending,
1354 adapter->force_reset_recovery);
1356 /* If device failover is pending, just set device state and return.
1357 * Device operation will be handled by reset routine.
1359 if (adapter->failover_pending) {
1360 adapter->state = VNIC_CLOSED;
1364 rc = __ibmvnic_close(netdev);
1365 ibmvnic_cleanup(netdev);
1371 * build_hdr_data - creates L2/L3/L4 header data buffer
1372 * @hdr_field: bitfield determining needed headers
1373 * @skb: socket buffer
1374 * @hdr_len: array of header lengths
1375 * @hdr_data: buffer to write the header to
1377 * Reads hdr_field to determine which headers are needed by firmware.
1378 * Builds a buffer containing these headers. Saves individual header
1379 * lengths and total buffer length to be used to build descriptors.
1381 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1382 int *hdr_len, u8 *hdr_data)
1387 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1388 hdr_len[0] = sizeof(struct vlan_ethhdr);
1390 hdr_len[0] = sizeof(struct ethhdr);
1392 if (skb->protocol == htons(ETH_P_IP)) {
1393 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1394 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1395 hdr_len[2] = tcp_hdrlen(skb);
1396 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1397 hdr_len[2] = sizeof(struct udphdr);
1398 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1399 hdr_len[1] = sizeof(struct ipv6hdr);
1400 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1401 hdr_len[2] = tcp_hdrlen(skb);
1402 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1403 hdr_len[2] = sizeof(struct udphdr);
1404 } else if (skb->protocol == htons(ETH_P_ARP)) {
1405 hdr_len[1] = arp_hdr_len(skb->dev);
1409 memset(hdr_data, 0, 120);
1410 if ((hdr_field >> 6) & 1) {
1411 hdr = skb_mac_header(skb);
1412 memcpy(hdr_data, hdr, hdr_len[0]);
1416 if ((hdr_field >> 5) & 1) {
1417 hdr = skb_network_header(skb);
1418 memcpy(hdr_data + len, hdr, hdr_len[1]);
1422 if ((hdr_field >> 4) & 1) {
1423 hdr = skb_transport_header(skb);
1424 memcpy(hdr_data + len, hdr, hdr_len[2]);
1431 * create_hdr_descs - create header and header extension descriptors
1432 * @hdr_field: bitfield determining needed headers
1433 * @hdr_data: buffer containing header data
1434 * @len: length of data buffer
1435 * @hdr_len: array of individual header lengths
1436 * @scrq_arr: descriptor array
1438 * Creates header and, if needed, header extension descriptors and
1439 * places them in a descriptor array, scrq_arr
1442 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1443 union sub_crq *scrq_arr)
1445 union sub_crq hdr_desc;
1451 while (tmp_len > 0) {
1452 cur = hdr_data + len - tmp_len;
1454 memset(&hdr_desc, 0, sizeof(hdr_desc));
1455 if (cur != hdr_data) {
1456 data = hdr_desc.hdr_ext.data;
1457 tmp = tmp_len > 29 ? 29 : tmp_len;
1458 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1459 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1460 hdr_desc.hdr_ext.len = tmp;
1462 data = hdr_desc.hdr.data;
1463 tmp = tmp_len > 24 ? 24 : tmp_len;
1464 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1465 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1466 hdr_desc.hdr.len = tmp;
1467 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1468 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1469 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1470 hdr_desc.hdr.flag = hdr_field << 1;
1472 memcpy(data, cur, tmp);
1474 *scrq_arr = hdr_desc;
1483 * build_hdr_descs_arr - build a header descriptor array
1484 * @txbuff: tx buffer
1485 * @num_entries: number of descriptors to be sent
1486 * @hdr_field: bit field determining which headers will be sent
1488 * This function will build a TX descriptor array with applicable
1489 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1492 static void build_hdr_descs_arr(struct sk_buff *skb,
1493 union sub_crq *indir_arr,
1494 int *num_entries, u8 hdr_field)
1496 int hdr_len[3] = {0, 0, 0};
1497 u8 hdr_data[140] = {0};
1500 tot_len = build_hdr_data(hdr_field, skb, hdr_len,
1502 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1506 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1507 struct net_device *netdev)
1509 /* For some backing devices, mishandling of small packets
1510 * can result in a loss of connection or TX stall. Device
1511 * architects recommend that no packet should be smaller
1512 * than the minimum MTU value provided to the driver, so
1513 * pad any packets to that length
1515 if (skb->len < netdev->min_mtu)
1516 return skb_put_padto(skb, netdev->min_mtu);
1521 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
1522 struct ibmvnic_sub_crq_queue *tx_scrq)
1524 struct ibmvnic_ind_xmit_queue *ind_bufp;
1525 struct ibmvnic_tx_buff *tx_buff;
1526 struct ibmvnic_tx_pool *tx_pool;
1527 union sub_crq tx_scrq_entry;
1533 ind_bufp = &tx_scrq->ind_buf;
1534 entries = (u64)ind_bufp->index;
1535 queue_num = tx_scrq->pool_index;
1537 for (i = entries - 1; i >= 0; --i) {
1538 tx_scrq_entry = ind_bufp->indir_arr[i];
1539 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC)
1541 index = be32_to_cpu(tx_scrq_entry.v1.correlator);
1542 if (index & IBMVNIC_TSO_POOL_MASK) {
1543 tx_pool = &adapter->tso_pool[queue_num];
1544 index &= ~IBMVNIC_TSO_POOL_MASK;
1546 tx_pool = &adapter->tx_pool[queue_num];
1548 tx_pool->free_map[tx_pool->consumer_index] = index;
1549 tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
1550 tx_pool->num_buffers - 1 :
1551 tx_pool->consumer_index - 1;
1552 tx_buff = &tx_pool->tx_buff[index];
1553 adapter->netdev->stats.tx_packets--;
1554 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len;
1555 adapter->tx_stats_buffers[queue_num].packets--;
1556 adapter->tx_stats_buffers[queue_num].bytes -=
1558 dev_kfree_skb_any(tx_buff->skb);
1559 tx_buff->skb = NULL;
1560 adapter->netdev->stats.tx_dropped++;
1562 ind_bufp->index = 0;
1563 if (atomic_sub_return(entries, &tx_scrq->used) <=
1564 (adapter->req_tx_entries_per_subcrq / 2) &&
1565 __netif_subqueue_stopped(adapter->netdev, queue_num)) {
1566 netif_wake_subqueue(adapter->netdev, queue_num);
1567 netdev_dbg(adapter->netdev, "Started queue %d\n",
1572 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter,
1573 struct ibmvnic_sub_crq_queue *tx_scrq)
1575 struct ibmvnic_ind_xmit_queue *ind_bufp;
1581 ind_bufp = &tx_scrq->ind_buf;
1582 dma_addr = (u64)ind_bufp->indir_dma;
1583 entries = (u64)ind_bufp->index;
1584 handle = tx_scrq->handle;
1588 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries);
1590 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq);
1592 ind_bufp->index = 0;
1596 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1598 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1599 int queue_num = skb_get_queue_mapping(skb);
1600 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1601 struct device *dev = &adapter->vdev->dev;
1602 struct ibmvnic_ind_xmit_queue *ind_bufp;
1603 struct ibmvnic_tx_buff *tx_buff = NULL;
1604 struct ibmvnic_sub_crq_queue *tx_scrq;
1605 struct ibmvnic_tx_pool *tx_pool;
1606 unsigned int tx_send_failed = 0;
1607 netdev_tx_t ret = NETDEV_TX_OK;
1608 unsigned int tx_map_failed = 0;
1609 union sub_crq indir_arr[16];
1610 unsigned int tx_dropped = 0;
1611 unsigned int tx_packets = 0;
1612 unsigned int tx_bytes = 0;
1613 dma_addr_t data_dma_addr;
1614 struct netdev_queue *txq;
1615 unsigned long lpar_rc;
1616 union sub_crq tx_crq;
1617 unsigned int offset;
1618 int num_entries = 1;
1623 tx_scrq = adapter->tx_scrq[queue_num];
1624 txq = netdev_get_tx_queue(netdev, queue_num);
1625 ind_bufp = &tx_scrq->ind_buf;
1627 if (test_bit(0, &adapter->resetting)) {
1628 if (!netif_subqueue_stopped(netdev, skb))
1629 netif_stop_subqueue(netdev, queue_num);
1630 dev_kfree_skb_any(skb);
1635 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1639 if (ibmvnic_xmit_workarounds(skb, netdev)) {
1643 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1646 if (skb_is_gso(skb))
1647 tx_pool = &adapter->tso_pool[queue_num];
1649 tx_pool = &adapter->tx_pool[queue_num];
1651 index = tx_pool->free_map[tx_pool->consumer_index];
1653 if (index == IBMVNIC_INVALID_MAP) {
1654 dev_kfree_skb_any(skb);
1658 ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1662 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1664 offset = index * tx_pool->buf_size;
1665 dst = tx_pool->long_term_buff.buff + offset;
1666 memset(dst, 0, tx_pool->buf_size);
1667 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1669 if (skb_shinfo(skb)->nr_frags) {
1673 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1674 cur = skb_headlen(skb);
1676 /* Copy the frags */
1677 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1678 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1681 page_address(skb_frag_page(frag)) +
1682 skb_frag_off(frag), skb_frag_size(frag));
1683 cur += skb_frag_size(frag);
1686 skb_copy_from_linear_data(skb, dst, skb->len);
1689 /* post changes to long_term_buff *dst before VIOS accessing it */
1692 tx_pool->consumer_index =
1693 (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1695 tx_buff = &tx_pool->tx_buff[index];
1697 tx_buff->index = index;
1698 tx_buff->pool_index = queue_num;
1700 memset(&tx_crq, 0, sizeof(tx_crq));
1701 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1702 tx_crq.v1.type = IBMVNIC_TX_DESC;
1703 tx_crq.v1.n_crq_elem = 1;
1704 tx_crq.v1.n_sge = 1;
1705 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1707 if (skb_is_gso(skb))
1708 tx_crq.v1.correlator =
1709 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1711 tx_crq.v1.correlator = cpu_to_be32(index);
1712 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1713 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1714 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1716 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1717 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1718 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1721 if (skb->protocol == htons(ETH_P_IP)) {
1722 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1723 proto = ip_hdr(skb)->protocol;
1724 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1725 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1726 proto = ipv6_hdr(skb)->nexthdr;
1729 if (proto == IPPROTO_TCP)
1730 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1731 else if (proto == IPPROTO_UDP)
1732 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1734 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1735 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1738 if (skb_is_gso(skb)) {
1739 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1740 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1744 if ((*hdrs >> 7) & 1)
1745 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs);
1747 tx_crq.v1.n_crq_elem = num_entries;
1748 tx_buff->num_entries = num_entries;
1749 /* flush buffer if current entry can not fit */
1750 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) {
1751 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1752 if (lpar_rc != H_SUCCESS)
1756 indir_arr[0] = tx_crq;
1757 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0],
1758 num_entries * sizeof(struct ibmvnic_generic_scrq));
1759 ind_bufp->index += num_entries;
1760 if (__netdev_tx_sent_queue(txq, skb->len,
1761 netdev_xmit_more() &&
1762 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) {
1763 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
1764 if (lpar_rc != H_SUCCESS)
1768 if (atomic_add_return(num_entries, &tx_scrq->used)
1769 >= adapter->req_tx_entries_per_subcrq) {
1770 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1771 netif_stop_subqueue(netdev, queue_num);
1775 tx_bytes += skb->len;
1776 txq->trans_start = jiffies;
1781 dev_kfree_skb_any(skb);
1782 tx_buff->skb = NULL;
1783 tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
1784 tx_pool->num_buffers - 1 :
1785 tx_pool->consumer_index - 1;
1788 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1789 dev_err_ratelimited(dev, "tx: send failed\n");
1791 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1792 /* Disable TX and report carrier off if queue is closed
1793 * or pending failover.
1794 * Firmware guarantees that a signal will be sent to the
1795 * driver, triggering a reset or some other action.
1797 netif_tx_stop_all_queues(netdev);
1798 netif_carrier_off(netdev);
1801 netdev->stats.tx_dropped += tx_dropped;
1802 netdev->stats.tx_bytes += tx_bytes;
1803 netdev->stats.tx_packets += tx_packets;
1804 adapter->tx_send_failed += tx_send_failed;
1805 adapter->tx_map_failed += tx_map_failed;
1806 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1807 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1808 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1813 static void ibmvnic_set_multi(struct net_device *netdev)
1815 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1816 struct netdev_hw_addr *ha;
1817 union ibmvnic_crq crq;
1819 memset(&crq, 0, sizeof(crq));
1820 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1821 crq.request_capability.cmd = REQUEST_CAPABILITY;
1823 if (netdev->flags & IFF_PROMISC) {
1824 if (!adapter->promisc_supported)
1827 if (netdev->flags & IFF_ALLMULTI) {
1828 /* Accept all multicast */
1829 memset(&crq, 0, sizeof(crq));
1830 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1831 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1832 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1833 ibmvnic_send_crq(adapter, &crq);
1834 } else if (netdev_mc_empty(netdev)) {
1835 /* Reject all multicast */
1836 memset(&crq, 0, sizeof(crq));
1837 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1838 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1839 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1840 ibmvnic_send_crq(adapter, &crq);
1842 /* Accept one or more multicast(s) */
1843 netdev_for_each_mc_addr(ha, netdev) {
1844 memset(&crq, 0, sizeof(crq));
1845 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1846 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1847 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1848 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1850 ibmvnic_send_crq(adapter, &crq);
1856 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1858 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1859 union ibmvnic_crq crq;
1862 if (!is_valid_ether_addr(dev_addr)) {
1863 rc = -EADDRNOTAVAIL;
1867 memset(&crq, 0, sizeof(crq));
1868 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1869 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1870 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1872 mutex_lock(&adapter->fw_lock);
1873 adapter->fw_done_rc = 0;
1874 reinit_completion(&adapter->fw_done);
1876 rc = ibmvnic_send_crq(adapter, &crq);
1879 mutex_unlock(&adapter->fw_lock);
1883 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1884 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1885 if (rc || adapter->fw_done_rc) {
1887 mutex_unlock(&adapter->fw_lock);
1890 mutex_unlock(&adapter->fw_lock);
1893 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1897 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1899 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1900 struct sockaddr *addr = p;
1904 if (!is_valid_ether_addr(addr->sa_data))
1905 return -EADDRNOTAVAIL;
1907 ether_addr_copy(adapter->mac_addr, addr->sa_data);
1908 if (adapter->state != VNIC_PROBED)
1909 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
1915 * do_reset returns zero if we are able to keep processing reset events, or
1916 * non-zero if we hit a fatal error and must halt.
1918 static int do_reset(struct ibmvnic_adapter *adapter,
1919 struct ibmvnic_rwi *rwi, u32 reset_state)
1921 u64 old_num_rx_queues, old_num_tx_queues;
1922 u64 old_num_rx_slots, old_num_tx_slots;
1923 struct net_device *netdev = adapter->netdev;
1926 netdev_dbg(adapter->netdev,
1927 "[S:%d FOP:%d] Reset reason %d, reset_state %d\n",
1928 adapter->state, adapter->failover_pending,
1929 rwi->reset_reason, reset_state);
1931 adapter->reset_reason = rwi->reset_reason;
1932 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */
1933 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
1936 /* Now that we have the rtnl lock, clear any pending failover.
1937 * This will ensure ibmvnic_open() has either completed or will
1938 * block until failover is complete.
1940 if (rwi->reset_reason == VNIC_RESET_FAILOVER)
1941 adapter->failover_pending = false;
1943 /* read the state and check (again) after getting rtnl */
1944 reset_state = adapter->state;
1946 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
1951 netif_carrier_off(netdev);
1953 old_num_rx_queues = adapter->req_rx_queues;
1954 old_num_tx_queues = adapter->req_tx_queues;
1955 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1956 old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1958 ibmvnic_cleanup(netdev);
1960 if (reset_state == VNIC_OPEN &&
1961 adapter->reset_reason != VNIC_RESET_MOBILITY &&
1962 adapter->reset_reason != VNIC_RESET_FAILOVER) {
1963 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
1964 rc = __ibmvnic_close(netdev);
1968 adapter->state = VNIC_CLOSING;
1970 /* Release the RTNL lock before link state change and
1971 * re-acquire after the link state change to allow
1972 * linkwatch_event to grab the RTNL lock and run during
1976 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1981 if (adapter->state == VNIC_OPEN) {
1982 /* When we dropped rtnl, ibmvnic_open() got
1983 * it and noticed that we are resetting and
1984 * set the adapter state to OPEN. Update our
1985 * new "target" state, and resume the reset
1986 * from VNIC_CLOSING state.
1989 "Open changed state from %d, updating.\n",
1991 reset_state = VNIC_OPEN;
1992 adapter->state = VNIC_CLOSING;
1995 if (adapter->state != VNIC_CLOSING) {
1996 /* If someone else changed the adapter state
1997 * when we dropped the rtnl, fail the reset
2002 adapter->state = VNIC_CLOSED;
2006 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2007 release_resources(adapter);
2008 release_sub_crqs(adapter, 1);
2009 release_crq_queue(adapter);
2012 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
2013 /* remove the closed state so when we call open it appears
2014 * we are coming from the probed state.
2016 adapter->state = VNIC_PROBED;
2018 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2019 rc = init_crq_queue(adapter);
2020 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
2021 rc = ibmvnic_reenable_crq_queue(adapter);
2022 release_sub_crqs(adapter, 1);
2024 rc = ibmvnic_reset_crq(adapter);
2025 if (rc == H_CLOSED || rc == H_SUCCESS) {
2026 rc = vio_enable_interrupts(adapter->vdev);
2028 netdev_err(adapter->netdev,
2029 "Reset failed to enable interrupts. rc=%d\n",
2035 netdev_err(adapter->netdev,
2036 "Reset couldn't initialize crq. rc=%d\n", rc);
2040 rc = ibmvnic_reset_init(adapter, true);
2042 rc = IBMVNIC_INIT_FAILED;
2046 /* If the adapter was in PROBE state prior to the reset,
2049 if (reset_state == VNIC_PROBED) {
2054 rc = ibmvnic_login(netdev);
2058 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2059 rc = init_resources(adapter);
2062 } else if (adapter->req_rx_queues != old_num_rx_queues ||
2063 adapter->req_tx_queues != old_num_tx_queues ||
2064 adapter->req_rx_add_entries_per_subcrq !=
2066 adapter->req_tx_entries_per_subcrq !=
2068 !adapter->rx_pool ||
2069 !adapter->tso_pool ||
2070 !adapter->tx_pool) {
2071 release_rx_pools(adapter);
2072 release_tx_pools(adapter);
2073 release_napi(adapter);
2074 release_vpd_data(adapter);
2076 rc = init_resources(adapter);
2081 rc = reset_tx_pools(adapter);
2083 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n",
2088 rc = reset_rx_pools(adapter);
2090 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n",
2095 ibmvnic_disable_irqs(adapter);
2097 adapter->state = VNIC_CLOSED;
2099 if (reset_state == VNIC_CLOSED) {
2104 rc = __ibmvnic_open(netdev);
2106 rc = IBMVNIC_OPEN_FAILED;
2110 /* refresh device's multicast list */
2111 ibmvnic_set_multi(netdev);
2114 for (i = 0; i < adapter->req_rx_queues; i++)
2115 napi_schedule(&adapter->napi[i]);
2117 if (adapter->reset_reason == VNIC_RESET_FAILOVER ||
2118 adapter->reset_reason == VNIC_RESET_MOBILITY)
2119 __netdev_notify_peers(netdev);
2124 /* restore the adapter state if reset failed */
2126 adapter->state = reset_state;
2127 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */
2128 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
2131 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Reset done, rc %d\n",
2132 adapter->state, adapter->failover_pending, rc);
2136 static int do_hard_reset(struct ibmvnic_adapter *adapter,
2137 struct ibmvnic_rwi *rwi, u32 reset_state)
2139 struct net_device *netdev = adapter->netdev;
2142 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
2145 /* read the state and check (again) after getting rtnl */
2146 reset_state = adapter->state;
2148 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
2153 netif_carrier_off(netdev);
2154 adapter->reset_reason = rwi->reset_reason;
2156 ibmvnic_cleanup(netdev);
2157 release_resources(adapter);
2158 release_sub_crqs(adapter, 0);
2159 release_crq_queue(adapter);
2161 /* remove the closed state so when we call open it appears
2162 * we are coming from the probed state.
2164 adapter->state = VNIC_PROBED;
2166 reinit_completion(&adapter->init_done);
2167 rc = init_crq_queue(adapter);
2169 netdev_err(adapter->netdev,
2170 "Couldn't initialize crq. rc=%d\n", rc);
2174 rc = ibmvnic_reset_init(adapter, false);
2178 /* If the adapter was in PROBE state prior to the reset,
2181 if (reset_state == VNIC_PROBED)
2184 rc = ibmvnic_login(netdev);
2188 rc = init_resources(adapter);
2192 ibmvnic_disable_irqs(adapter);
2193 adapter->state = VNIC_CLOSED;
2195 if (reset_state == VNIC_CLOSED)
2198 rc = __ibmvnic_open(netdev);
2200 rc = IBMVNIC_OPEN_FAILED;
2204 __netdev_notify_peers(netdev);
2206 /* restore adapter state if reset failed */
2208 adapter->state = reset_state;
2209 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Hard reset done, rc %d\n",
2210 adapter->state, adapter->failover_pending, rc);
2214 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2216 struct ibmvnic_rwi *rwi;
2217 unsigned long flags;
2219 spin_lock_irqsave(&adapter->rwi_lock, flags);
2221 if (!list_empty(&adapter->rwi_list)) {
2222 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2224 list_del(&rwi->list);
2229 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2233 static void __ibmvnic_reset(struct work_struct *work)
2235 struct ibmvnic_rwi *rwi;
2236 struct ibmvnic_adapter *adapter;
2237 bool saved_state = false;
2238 unsigned long flags;
2242 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2244 if (test_and_set_bit_lock(0, &adapter->resetting)) {
2245 schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
2246 IBMVNIC_RESET_DELAY);
2250 rwi = get_next_rwi(adapter);
2252 spin_lock_irqsave(&adapter->state_lock, flags);
2254 if (adapter->state == VNIC_REMOVING ||
2255 adapter->state == VNIC_REMOVED) {
2256 spin_unlock_irqrestore(&adapter->state_lock, flags);
2263 reset_state = adapter->state;
2266 spin_unlock_irqrestore(&adapter->state_lock, flags);
2268 if (adapter->force_reset_recovery) {
2269 /* Since we are doing a hard reset now, clear the
2270 * failover_pending flag so we don't ignore any
2271 * future MOBILITY or other resets.
2273 adapter->failover_pending = false;
2275 /* Transport event occurred during previous reset */
2276 if (adapter->wait_for_reset) {
2277 /* Previous was CHANGE_PARAM; caller locked */
2278 adapter->force_reset_recovery = false;
2279 rc = do_hard_reset(adapter, rwi, reset_state);
2282 adapter->force_reset_recovery = false;
2283 rc = do_hard_reset(adapter, rwi, reset_state);
2287 /* give backing device time to settle down */
2288 netdev_dbg(adapter->netdev,
2289 "[S:%d] Hard reset failed, waiting 60 secs\n",
2291 set_current_state(TASK_UNINTERRUPTIBLE);
2292 schedule_timeout(60 * HZ);
2295 rc = do_reset(adapter, rwi, reset_state);
2298 adapter->last_reset_time = jiffies;
2301 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc);
2303 rwi = get_next_rwi(adapter);
2305 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2306 rwi->reset_reason == VNIC_RESET_MOBILITY))
2307 adapter->force_reset_recovery = true;
2310 if (adapter->wait_for_reset) {
2311 adapter->reset_done_rc = rc;
2312 complete(&adapter->reset_done);
2315 clear_bit_unlock(0, &adapter->resetting);
2317 netdev_dbg(adapter->netdev,
2318 "[S:%d FRR:%d WFR:%d] Done processing resets\n",
2319 adapter->state, adapter->force_reset_recovery,
2320 adapter->wait_for_reset);
2323 static void __ibmvnic_delayed_reset(struct work_struct *work)
2325 struct ibmvnic_adapter *adapter;
2327 adapter = container_of(work, struct ibmvnic_adapter,
2328 ibmvnic_delayed_reset.work);
2329 __ibmvnic_reset(&adapter->ibmvnic_reset);
2332 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2333 enum ibmvnic_reset_reason reason)
2335 struct list_head *entry, *tmp_entry;
2336 struct ibmvnic_rwi *rwi, *tmp;
2337 struct net_device *netdev = adapter->netdev;
2338 unsigned long flags;
2341 spin_lock_irqsave(&adapter->rwi_lock, flags);
2343 /* If failover is pending don't schedule any other reset.
2344 * Instead let the failover complete. If there is already a
2345 * a failover reset scheduled, we will detect and drop the
2346 * duplicate reset when walking the ->rwi_list below.
2348 if (adapter->state == VNIC_REMOVING ||
2349 adapter->state == VNIC_REMOVED ||
2350 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) {
2352 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2356 if (adapter->state == VNIC_PROBING) {
2357 netdev_warn(netdev, "Adapter reset during probe\n");
2358 adapter->init_done_rc = EAGAIN;
2363 list_for_each(entry, &adapter->rwi_list) {
2364 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2365 if (tmp->reset_reason == reason) {
2366 netdev_dbg(netdev, "Skipping matching reset, reason=%d\n",
2373 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2378 /* if we just received a transport event,
2379 * flush reset queue and process this reset
2381 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2382 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2385 rwi->reset_reason = reason;
2386 list_add_tail(&rwi->list, &adapter->rwi_list);
2387 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2388 schedule_work(&adapter->ibmvnic_reset);
2392 /* ibmvnic_close() below can block, so drop the lock first */
2393 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2396 ibmvnic_close(netdev);
2401 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2403 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2405 if (test_bit(0, &adapter->resetting)) {
2406 netdev_err(adapter->netdev,
2407 "Adapter is resetting, skip timeout reset\n");
2410 /* No queuing up reset until at least 5 seconds (default watchdog val)
2413 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) {
2414 netdev_dbg(dev, "Not yet time to tx timeout.\n");
2417 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2420 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2421 struct ibmvnic_rx_buff *rx_buff)
2423 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2425 rx_buff->skb = NULL;
2427 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2428 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2430 atomic_dec(&pool->available);
2433 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2435 struct ibmvnic_sub_crq_queue *rx_scrq;
2436 struct ibmvnic_adapter *adapter;
2437 struct net_device *netdev;
2438 int frames_processed;
2442 adapter = netdev_priv(netdev);
2443 scrq_num = (int)(napi - adapter->napi);
2444 frames_processed = 0;
2445 rx_scrq = adapter->rx_scrq[scrq_num];
2448 while (frames_processed < budget) {
2449 struct sk_buff *skb;
2450 struct ibmvnic_rx_buff *rx_buff;
2451 union sub_crq *next;
2456 if (unlikely(test_bit(0, &adapter->resetting) &&
2457 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2458 enable_scrq_irq(adapter, rx_scrq);
2459 napi_complete_done(napi, frames_processed);
2460 return frames_processed;
2463 if (!pending_scrq(adapter, rx_scrq))
2465 next = ibmvnic_next_scrq(adapter, rx_scrq);
2466 rx_buff = (struct ibmvnic_rx_buff *)
2467 be64_to_cpu(next->rx_comp.correlator);
2468 /* do error checking */
2469 if (next->rx_comp.rc) {
2470 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2471 be16_to_cpu(next->rx_comp.rc));
2472 /* free the entry */
2473 next->rx_comp.first = 0;
2474 dev_kfree_skb_any(rx_buff->skb);
2475 remove_buff_from_pool(adapter, rx_buff);
2477 } else if (!rx_buff->skb) {
2478 /* free the entry */
2479 next->rx_comp.first = 0;
2480 remove_buff_from_pool(adapter, rx_buff);
2484 length = be32_to_cpu(next->rx_comp.len);
2485 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2486 flags = next->rx_comp.flags;
2488 /* load long_term_buff before copying to skb */
2490 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2493 /* VLAN Header has been stripped by the system firmware and
2494 * needs to be inserted by the driver
2496 if (adapter->rx_vlan_header_insertion &&
2497 (flags & IBMVNIC_VLAN_STRIPPED))
2498 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2499 ntohs(next->rx_comp.vlan_tci));
2501 /* free the entry */
2502 next->rx_comp.first = 0;
2503 remove_buff_from_pool(adapter, rx_buff);
2505 skb_put(skb, length);
2506 skb->protocol = eth_type_trans(skb, netdev);
2507 skb_record_rx_queue(skb, scrq_num);
2509 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2510 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2511 skb->ip_summed = CHECKSUM_UNNECESSARY;
2515 napi_gro_receive(napi, skb); /* send it up */
2516 netdev->stats.rx_packets++;
2517 netdev->stats.rx_bytes += length;
2518 adapter->rx_stats_buffers[scrq_num].packets++;
2519 adapter->rx_stats_buffers[scrq_num].bytes += length;
2523 if (adapter->state != VNIC_CLOSING &&
2524 ((atomic_read(&adapter->rx_pool[scrq_num].available) <
2525 adapter->req_rx_add_entries_per_subcrq / 2) ||
2526 frames_processed < budget))
2527 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2528 if (frames_processed < budget) {
2529 if (napi_complete_done(napi, frames_processed)) {
2530 enable_scrq_irq(adapter, rx_scrq);
2531 if (pending_scrq(adapter, rx_scrq)) {
2532 if (napi_reschedule(napi)) {
2533 disable_scrq_irq(adapter, rx_scrq);
2539 return frames_processed;
2542 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2546 adapter->fallback.mtu = adapter->req_mtu;
2547 adapter->fallback.rx_queues = adapter->req_rx_queues;
2548 adapter->fallback.tx_queues = adapter->req_tx_queues;
2549 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2550 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2552 reinit_completion(&adapter->reset_done);
2553 adapter->wait_for_reset = true;
2554 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2560 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2567 if (adapter->reset_done_rc) {
2569 adapter->desired.mtu = adapter->fallback.mtu;
2570 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2571 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2572 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2573 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2575 reinit_completion(&adapter->reset_done);
2576 adapter->wait_for_reset = true;
2577 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2582 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2590 adapter->wait_for_reset = false;
2595 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2597 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2599 adapter->desired.mtu = new_mtu + ETH_HLEN;
2601 return wait_for_reset(adapter);
2604 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2605 struct net_device *dev,
2606 netdev_features_t features)
2608 /* Some backing hardware adapters can not
2609 * handle packets with a MSS less than 224
2610 * or with only one segment.
2612 if (skb_is_gso(skb)) {
2613 if (skb_shinfo(skb)->gso_size < 224 ||
2614 skb_shinfo(skb)->gso_segs == 1)
2615 features &= ~NETIF_F_GSO_MASK;
2621 static const struct net_device_ops ibmvnic_netdev_ops = {
2622 .ndo_open = ibmvnic_open,
2623 .ndo_stop = ibmvnic_close,
2624 .ndo_start_xmit = ibmvnic_xmit,
2625 .ndo_set_rx_mode = ibmvnic_set_multi,
2626 .ndo_set_mac_address = ibmvnic_set_mac,
2627 .ndo_validate_addr = eth_validate_addr,
2628 .ndo_tx_timeout = ibmvnic_tx_timeout,
2629 .ndo_change_mtu = ibmvnic_change_mtu,
2630 .ndo_features_check = ibmvnic_features_check,
2633 /* ethtool functions */
2635 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2636 struct ethtool_link_ksettings *cmd)
2638 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2641 rc = send_query_phys_parms(adapter);
2643 adapter->speed = SPEED_UNKNOWN;
2644 adapter->duplex = DUPLEX_UNKNOWN;
2646 cmd->base.speed = adapter->speed;
2647 cmd->base.duplex = adapter->duplex;
2648 cmd->base.port = PORT_FIBRE;
2649 cmd->base.phy_address = 0;
2650 cmd->base.autoneg = AUTONEG_ENABLE;
2655 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2656 struct ethtool_drvinfo *info)
2658 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2660 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2661 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2662 strscpy(info->fw_version, adapter->fw_version,
2663 sizeof(info->fw_version));
2666 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2668 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2670 return adapter->msg_enable;
2673 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2675 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2677 adapter->msg_enable = data;
2680 static u32 ibmvnic_get_link(struct net_device *netdev)
2682 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2684 /* Don't need to send a query because we request a logical link up at
2685 * init and then we wait for link state indications
2687 return adapter->logical_link_state;
2690 static void ibmvnic_get_ringparam(struct net_device *netdev,
2691 struct ethtool_ringparam *ring)
2693 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2695 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2696 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2697 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2699 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2700 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2702 ring->rx_mini_max_pending = 0;
2703 ring->rx_jumbo_max_pending = 0;
2704 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2705 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2706 ring->rx_mini_pending = 0;
2707 ring->rx_jumbo_pending = 0;
2710 static int ibmvnic_set_ringparam(struct net_device *netdev,
2711 struct ethtool_ringparam *ring)
2713 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2717 adapter->desired.rx_entries = ring->rx_pending;
2718 adapter->desired.tx_entries = ring->tx_pending;
2720 ret = wait_for_reset(adapter);
2723 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2724 adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2726 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2727 ring->rx_pending, ring->tx_pending,
2728 adapter->req_rx_add_entries_per_subcrq,
2729 adapter->req_tx_entries_per_subcrq);
2733 static void ibmvnic_get_channels(struct net_device *netdev,
2734 struct ethtool_channels *channels)
2736 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2738 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2739 channels->max_rx = adapter->max_rx_queues;
2740 channels->max_tx = adapter->max_tx_queues;
2742 channels->max_rx = IBMVNIC_MAX_QUEUES;
2743 channels->max_tx = IBMVNIC_MAX_QUEUES;
2746 channels->max_other = 0;
2747 channels->max_combined = 0;
2748 channels->rx_count = adapter->req_rx_queues;
2749 channels->tx_count = adapter->req_tx_queues;
2750 channels->other_count = 0;
2751 channels->combined_count = 0;
2754 static int ibmvnic_set_channels(struct net_device *netdev,
2755 struct ethtool_channels *channels)
2757 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2761 adapter->desired.rx_queues = channels->rx_count;
2762 adapter->desired.tx_queues = channels->tx_count;
2764 ret = wait_for_reset(adapter);
2767 (adapter->req_rx_queues != channels->rx_count ||
2768 adapter->req_tx_queues != channels->tx_count))
2770 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2771 channels->rx_count, channels->tx_count,
2772 adapter->req_rx_queues, adapter->req_tx_queues);
2776 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2778 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2781 switch (stringset) {
2783 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2784 i++, data += ETH_GSTRING_LEN)
2785 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2787 for (i = 0; i < adapter->req_tx_queues; i++) {
2788 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2789 data += ETH_GSTRING_LEN;
2791 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2792 data += ETH_GSTRING_LEN;
2794 snprintf(data, ETH_GSTRING_LEN,
2795 "tx%d_dropped_packets", i);
2796 data += ETH_GSTRING_LEN;
2799 for (i = 0; i < adapter->req_rx_queues; i++) {
2800 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2801 data += ETH_GSTRING_LEN;
2803 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2804 data += ETH_GSTRING_LEN;
2806 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2807 data += ETH_GSTRING_LEN;
2811 case ETH_SS_PRIV_FLAGS:
2812 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2813 strcpy(data + i * ETH_GSTRING_LEN,
2814 ibmvnic_priv_flags[i]);
2821 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2823 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2827 return ARRAY_SIZE(ibmvnic_stats) +
2828 adapter->req_tx_queues * NUM_TX_STATS +
2829 adapter->req_rx_queues * NUM_RX_STATS;
2830 case ETH_SS_PRIV_FLAGS:
2831 return ARRAY_SIZE(ibmvnic_priv_flags);
2837 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2838 struct ethtool_stats *stats, u64 *data)
2840 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2841 union ibmvnic_crq crq;
2845 memset(&crq, 0, sizeof(crq));
2846 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2847 crq.request_statistics.cmd = REQUEST_STATISTICS;
2848 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2849 crq.request_statistics.len =
2850 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2852 /* Wait for data to be written */
2853 reinit_completion(&adapter->stats_done);
2854 rc = ibmvnic_send_crq(adapter, &crq);
2857 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
2861 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2862 data[i] = be64_to_cpu(IBMVNIC_GET_STAT
2863 (adapter, ibmvnic_stats[i].offset));
2865 for (j = 0; j < adapter->req_tx_queues; j++) {
2866 data[i] = adapter->tx_stats_buffers[j].packets;
2868 data[i] = adapter->tx_stats_buffers[j].bytes;
2870 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2874 for (j = 0; j < adapter->req_rx_queues; j++) {
2875 data[i] = adapter->rx_stats_buffers[j].packets;
2877 data[i] = adapter->rx_stats_buffers[j].bytes;
2879 data[i] = adapter->rx_stats_buffers[j].interrupts;
2884 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2886 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2888 return adapter->priv_flags;
2891 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2893 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2894 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2897 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2899 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2904 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2905 .get_drvinfo = ibmvnic_get_drvinfo,
2906 .get_msglevel = ibmvnic_get_msglevel,
2907 .set_msglevel = ibmvnic_set_msglevel,
2908 .get_link = ibmvnic_get_link,
2909 .get_ringparam = ibmvnic_get_ringparam,
2910 .set_ringparam = ibmvnic_set_ringparam,
2911 .get_channels = ibmvnic_get_channels,
2912 .set_channels = ibmvnic_set_channels,
2913 .get_strings = ibmvnic_get_strings,
2914 .get_sset_count = ibmvnic_get_sset_count,
2915 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2916 .get_link_ksettings = ibmvnic_get_link_ksettings,
2917 .get_priv_flags = ibmvnic_get_priv_flags,
2918 .set_priv_flags = ibmvnic_set_priv_flags,
2921 /* Routines for managing CRQs/sCRQs */
2923 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2924 struct ibmvnic_sub_crq_queue *scrq)
2929 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n");
2934 free_irq(scrq->irq, scrq);
2935 irq_dispose_mapping(scrq->irq);
2940 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2941 atomic_set(&scrq->used, 0);
2943 scrq->ind_buf.index = 0;
2945 netdev_dbg(adapter->netdev, "Invalid scrq reset\n");
2949 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2950 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2954 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2958 if (!adapter->tx_scrq || !adapter->rx_scrq)
2961 for (i = 0; i < adapter->req_tx_queues; i++) {
2962 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2963 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2968 for (i = 0; i < adapter->req_rx_queues; i++) {
2969 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2970 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2978 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2979 struct ibmvnic_sub_crq_queue *scrq,
2982 struct device *dev = &adapter->vdev->dev;
2985 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2988 /* Close the sub-crqs */
2990 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2991 adapter->vdev->unit_address,
2993 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2996 netdev_err(adapter->netdev,
2997 "Failed to release sub-CRQ %16lx, rc = %ld\n",
3002 dma_free_coherent(dev,
3004 scrq->ind_buf.indir_arr,
3005 scrq->ind_buf.indir_dma);
3007 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
3009 free_pages((unsigned long)scrq->msgs, 2);
3013 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
3016 struct device *dev = &adapter->vdev->dev;
3017 struct ibmvnic_sub_crq_queue *scrq;
3020 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
3025 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
3027 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
3028 goto zero_page_failed;
3031 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
3033 if (dma_mapping_error(dev, scrq->msg_token)) {
3034 dev_warn(dev, "Couldn't map crq queue messages page\n");
3038 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
3039 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
3041 if (rc == H_RESOURCE)
3042 rc = ibmvnic_reset_crq(adapter);
3044 if (rc == H_CLOSED) {
3045 dev_warn(dev, "Partner adapter not ready, waiting.\n");
3047 dev_warn(dev, "Error %d registering sub-crq\n", rc);
3051 scrq->adapter = adapter;
3052 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
3053 scrq->ind_buf.index = 0;
3055 scrq->ind_buf.indir_arr =
3056 dma_alloc_coherent(dev,
3058 &scrq->ind_buf.indir_dma,
3061 if (!scrq->ind_buf.indir_arr)
3064 spin_lock_init(&scrq->lock);
3066 netdev_dbg(adapter->netdev,
3067 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
3068 scrq->crq_num, scrq->hw_irq, scrq->irq);
3074 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
3075 adapter->vdev->unit_address,
3077 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc));
3079 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
3082 free_pages((unsigned long)scrq->msgs, 2);
3089 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
3093 if (adapter->tx_scrq) {
3094 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
3095 if (!adapter->tx_scrq[i])
3098 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
3100 if (adapter->tx_scrq[i]->irq) {
3101 free_irq(adapter->tx_scrq[i]->irq,
3102 adapter->tx_scrq[i]);
3103 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
3104 adapter->tx_scrq[i]->irq = 0;
3107 release_sub_crq_queue(adapter, adapter->tx_scrq[i],
3111 kfree(adapter->tx_scrq);
3112 adapter->tx_scrq = NULL;
3113 adapter->num_active_tx_scrqs = 0;
3116 if (adapter->rx_scrq) {
3117 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
3118 if (!adapter->rx_scrq[i])
3121 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
3123 if (adapter->rx_scrq[i]->irq) {
3124 free_irq(adapter->rx_scrq[i]->irq,
3125 adapter->rx_scrq[i]);
3126 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
3127 adapter->rx_scrq[i]->irq = 0;
3130 release_sub_crq_queue(adapter, adapter->rx_scrq[i],
3134 kfree(adapter->rx_scrq);
3135 adapter->rx_scrq = NULL;
3136 adapter->num_active_rx_scrqs = 0;
3140 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
3141 struct ibmvnic_sub_crq_queue *scrq)
3143 struct device *dev = &adapter->vdev->dev;
3146 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3147 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3149 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
3154 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
3155 struct ibmvnic_sub_crq_queue *scrq)
3157 struct device *dev = &adapter->vdev->dev;
3160 if (scrq->hw_irq > 0x100000000ULL) {
3161 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
3165 if (test_bit(0, &adapter->resetting) &&
3166 adapter->reset_reason == VNIC_RESET_MOBILITY) {
3167 u64 val = (0xff000000) | scrq->hw_irq;
3169 rc = plpar_hcall_norets(H_EOI, val);
3170 /* H_EOI would fail with rc = H_FUNCTION when running
3171 * in XIVE mode which is expected, but not an error.
3173 if (rc && rc != H_FUNCTION)
3174 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3178 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3179 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3181 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3186 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3187 struct ibmvnic_sub_crq_queue *scrq)
3189 struct device *dev = &adapter->vdev->dev;
3190 struct ibmvnic_tx_pool *tx_pool;
3191 struct ibmvnic_tx_buff *txbuff;
3192 struct netdev_queue *txq;
3193 union sub_crq *next;
3198 while (pending_scrq(adapter, scrq)) {
3199 unsigned int pool = scrq->pool_index;
3200 int num_entries = 0;
3201 int total_bytes = 0;
3202 int num_packets = 0;
3204 next = ibmvnic_next_scrq(adapter, scrq);
3205 for (i = 0; i < next->tx_comp.num_comps; i++) {
3206 index = be32_to_cpu(next->tx_comp.correlators[i]);
3207 if (index & IBMVNIC_TSO_POOL_MASK) {
3208 tx_pool = &adapter->tso_pool[pool];
3209 index &= ~IBMVNIC_TSO_POOL_MASK;
3211 tx_pool = &adapter->tx_pool[pool];
3214 txbuff = &tx_pool->tx_buff[index];
3216 num_entries += txbuff->num_entries;
3218 total_bytes += txbuff->skb->len;
3219 if (next->tx_comp.rcs[i]) {
3220 dev_err(dev, "tx error %x\n",
3221 next->tx_comp.rcs[i]);
3222 dev_kfree_skb_irq(txbuff->skb);
3224 dev_consume_skb_irq(txbuff->skb);
3228 netdev_warn(adapter->netdev,
3229 "TX completion received with NULL socket buffer\n");
3231 tx_pool->free_map[tx_pool->producer_index] = index;
3232 tx_pool->producer_index =
3233 (tx_pool->producer_index + 1) %
3234 tx_pool->num_buffers;
3236 /* remove tx_comp scrq*/
3237 next->tx_comp.first = 0;
3239 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index);
3240 netdev_tx_completed_queue(txq, num_packets, total_bytes);
3242 if (atomic_sub_return(num_entries, &scrq->used) <=
3243 (adapter->req_tx_entries_per_subcrq / 2) &&
3244 __netif_subqueue_stopped(adapter->netdev,
3245 scrq->pool_index)) {
3246 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3247 netdev_dbg(adapter->netdev, "Started queue %d\n",
3252 enable_scrq_irq(adapter, scrq);
3254 if (pending_scrq(adapter, scrq)) {
3255 disable_scrq_irq(adapter, scrq);
3262 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3264 struct ibmvnic_sub_crq_queue *scrq = instance;
3265 struct ibmvnic_adapter *adapter = scrq->adapter;
3267 disable_scrq_irq(adapter, scrq);
3268 ibmvnic_complete_tx(adapter, scrq);
3273 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3275 struct ibmvnic_sub_crq_queue *scrq = instance;
3276 struct ibmvnic_adapter *adapter = scrq->adapter;
3278 /* When booting a kdump kernel we can hit pending interrupts
3279 * prior to completing driver initialization.
3281 if (unlikely(adapter->state != VNIC_OPEN))
3284 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3286 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3287 disable_scrq_irq(adapter, scrq);
3288 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3294 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3296 struct device *dev = &adapter->vdev->dev;
3297 struct ibmvnic_sub_crq_queue *scrq;
3301 for (i = 0; i < adapter->req_tx_queues; i++) {
3302 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3304 scrq = adapter->tx_scrq[i];
3305 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3309 dev_err(dev, "Error mapping irq\n");
3310 goto req_tx_irq_failed;
3313 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3314 adapter->vdev->unit_address, i);
3315 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3316 0, scrq->name, scrq);
3319 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3321 irq_dispose_mapping(scrq->irq);
3322 goto req_tx_irq_failed;
3326 for (i = 0; i < adapter->req_rx_queues; i++) {
3327 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3329 scrq = adapter->rx_scrq[i];
3330 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3333 dev_err(dev, "Error mapping irq\n");
3334 goto req_rx_irq_failed;
3336 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3337 adapter->vdev->unit_address, i);
3338 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3339 0, scrq->name, scrq);
3341 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3343 irq_dispose_mapping(scrq->irq);
3344 goto req_rx_irq_failed;
3350 for (j = 0; j < i; j++) {
3351 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3352 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3354 i = adapter->req_tx_queues;
3356 for (j = 0; j < i; j++) {
3357 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3358 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
3360 release_sub_crqs(adapter, 1);
3364 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3366 struct device *dev = &adapter->vdev->dev;
3367 struct ibmvnic_sub_crq_queue **allqueues;
3368 int registered_queues = 0;
3373 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3375 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3379 for (i = 0; i < total_queues; i++) {
3380 allqueues[i] = init_sub_crq_queue(adapter);
3381 if (!allqueues[i]) {
3382 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3385 registered_queues++;
3388 /* Make sure we were able to register the minimum number of queues */
3389 if (registered_queues <
3390 adapter->min_tx_queues + adapter->min_rx_queues) {
3391 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
3395 /* Distribute the failed allocated queues*/
3396 for (i = 0; i < total_queues - registered_queues + more ; i++) {
3397 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3400 if (adapter->req_rx_queues > adapter->min_rx_queues)
3401 adapter->req_rx_queues--;
3406 if (adapter->req_tx_queues > adapter->min_tx_queues)
3407 adapter->req_tx_queues--;
3414 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3415 sizeof(*adapter->tx_scrq), GFP_KERNEL);
3416 if (!adapter->tx_scrq)
3419 for (i = 0; i < adapter->req_tx_queues; i++) {
3420 adapter->tx_scrq[i] = allqueues[i];
3421 adapter->tx_scrq[i]->pool_index = i;
3422 adapter->num_active_tx_scrqs++;
3425 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3426 sizeof(*adapter->rx_scrq), GFP_KERNEL);
3427 if (!adapter->rx_scrq)
3430 for (i = 0; i < adapter->req_rx_queues; i++) {
3431 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3432 adapter->rx_scrq[i]->scrq_num = i;
3433 adapter->num_active_rx_scrqs++;
3440 kfree(adapter->tx_scrq);
3441 adapter->tx_scrq = NULL;
3443 for (i = 0; i < registered_queues; i++)
3444 release_sub_crq_queue(adapter, allqueues[i], 1);
3449 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry)
3451 struct device *dev = &adapter->vdev->dev;
3452 union ibmvnic_crq crq;
3456 /* Sub-CRQ entries are 32 byte long */
3457 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3459 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3460 adapter->min_rx_add_entries_per_subcrq > entries_page) {
3461 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3465 if (adapter->desired.mtu)
3466 adapter->req_mtu = adapter->desired.mtu;
3468 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3470 if (!adapter->desired.tx_entries)
3471 adapter->desired.tx_entries =
3472 adapter->max_tx_entries_per_subcrq;
3473 if (!adapter->desired.rx_entries)
3474 adapter->desired.rx_entries =
3475 adapter->max_rx_add_entries_per_subcrq;
3477 max_entries = IBMVNIC_MAX_LTB_SIZE /
3478 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3480 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3481 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3482 adapter->desired.tx_entries = max_entries;
3485 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3486 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3487 adapter->desired.rx_entries = max_entries;
3490 if (adapter->desired.tx_entries)
3491 adapter->req_tx_entries_per_subcrq =
3492 adapter->desired.tx_entries;
3494 adapter->req_tx_entries_per_subcrq =
3495 adapter->max_tx_entries_per_subcrq;
3497 if (adapter->desired.rx_entries)
3498 adapter->req_rx_add_entries_per_subcrq =
3499 adapter->desired.rx_entries;
3501 adapter->req_rx_add_entries_per_subcrq =
3502 adapter->max_rx_add_entries_per_subcrq;
3504 if (adapter->desired.tx_queues)
3505 adapter->req_tx_queues =
3506 adapter->desired.tx_queues;
3508 adapter->req_tx_queues =
3509 adapter->opt_tx_comp_sub_queues;
3511 if (adapter->desired.rx_queues)
3512 adapter->req_rx_queues =
3513 adapter->desired.rx_queues;
3515 adapter->req_rx_queues =
3516 adapter->opt_rx_comp_queues;
3518 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3521 memset(&crq, 0, sizeof(crq));
3522 crq.request_capability.first = IBMVNIC_CRQ_CMD;
3523 crq.request_capability.cmd = REQUEST_CAPABILITY;
3525 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3526 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3527 atomic_inc(&adapter->running_cap_crqs);
3528 ibmvnic_send_crq(adapter, &crq);
3530 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3531 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3532 atomic_inc(&adapter->running_cap_crqs);
3533 ibmvnic_send_crq(adapter, &crq);
3535 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3536 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3537 atomic_inc(&adapter->running_cap_crqs);
3538 ibmvnic_send_crq(adapter, &crq);
3540 crq.request_capability.capability =
3541 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3542 crq.request_capability.number =
3543 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3544 atomic_inc(&adapter->running_cap_crqs);
3545 ibmvnic_send_crq(adapter, &crq);
3547 crq.request_capability.capability =
3548 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3549 crq.request_capability.number =
3550 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3551 atomic_inc(&adapter->running_cap_crqs);
3552 ibmvnic_send_crq(adapter, &crq);
3554 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3555 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3556 atomic_inc(&adapter->running_cap_crqs);
3557 ibmvnic_send_crq(adapter, &crq);
3559 if (adapter->netdev->flags & IFF_PROMISC) {
3560 if (adapter->promisc_supported) {
3561 crq.request_capability.capability =
3562 cpu_to_be16(PROMISC_REQUESTED);
3563 crq.request_capability.number = cpu_to_be64(1);
3564 atomic_inc(&adapter->running_cap_crqs);
3565 ibmvnic_send_crq(adapter, &crq);
3568 crq.request_capability.capability =
3569 cpu_to_be16(PROMISC_REQUESTED);
3570 crq.request_capability.number = cpu_to_be64(0);
3571 atomic_inc(&adapter->running_cap_crqs);
3572 ibmvnic_send_crq(adapter, &crq);
3576 static int pending_scrq(struct ibmvnic_adapter *adapter,
3577 struct ibmvnic_sub_crq_queue *scrq)
3579 union sub_crq *entry = &scrq->msgs[scrq->cur];
3582 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP);
3584 /* Ensure that the SCRQ valid flag is loaded prior to loading the
3585 * contents of the SCRQ descriptor
3592 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3593 struct ibmvnic_sub_crq_queue *scrq)
3595 union sub_crq *entry;
3596 unsigned long flags;
3598 spin_lock_irqsave(&scrq->lock, flags);
3599 entry = &scrq->msgs[scrq->cur];
3600 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3601 if (++scrq->cur == scrq->size)
3606 spin_unlock_irqrestore(&scrq->lock, flags);
3608 /* Ensure that the SCRQ valid flag is loaded prior to loading the
3609 * contents of the SCRQ descriptor
3616 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3618 struct ibmvnic_crq_queue *queue = &adapter->crq;
3619 union ibmvnic_crq *crq;
3621 crq = &queue->msgs[queue->cur];
3622 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3623 if (++queue->cur == queue->size)
3632 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3636 dev_warn_ratelimited(dev,
3637 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3641 dev_warn_ratelimited(dev,
3642 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3646 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3651 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3652 u64 remote_handle, u64 ioba, u64 num_entries)
3654 unsigned int ua = adapter->vdev->unit_address;
3655 struct device *dev = &adapter->vdev->dev;
3658 /* Make sure the hypervisor sees the complete request */
3660 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3661 cpu_to_be64(remote_handle),
3665 print_subcrq_error(dev, rc, __func__);
3670 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3671 union ibmvnic_crq *crq)
3673 unsigned int ua = adapter->vdev->unit_address;
3674 struct device *dev = &adapter->vdev->dev;
3675 u64 *u64_crq = (u64 *)crq;
3678 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3679 (unsigned long)cpu_to_be64(u64_crq[0]),
3680 (unsigned long)cpu_to_be64(u64_crq[1]));
3682 if (!adapter->crq.active &&
3683 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3684 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3688 /* Make sure the hypervisor sees the complete request */
3691 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3692 cpu_to_be64(u64_crq[0]),
3693 cpu_to_be64(u64_crq[1]));
3696 if (rc == H_CLOSED) {
3697 dev_warn(dev, "CRQ Queue closed\n");
3698 /* do not reset, report the fail, wait for passive init from server */
3701 dev_warn(dev, "Send error (rc=%d)\n", rc);
3707 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3709 struct device *dev = &adapter->vdev->dev;
3710 union ibmvnic_crq crq;
3714 memset(&crq, 0, sizeof(crq));
3715 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3716 crq.generic.cmd = IBMVNIC_CRQ_INIT;
3717 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3720 rc = ibmvnic_send_crq(adapter, &crq);
3726 } while (retries > 0);
3729 dev_err(dev, "Failed to send init request, rc = %d\n", rc);
3736 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3738 union ibmvnic_crq crq;
3740 memset(&crq, 0, sizeof(crq));
3741 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3742 crq.version_exchange.cmd = VERSION_EXCHANGE;
3743 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3745 return ibmvnic_send_crq(adapter, &crq);
3748 struct vnic_login_client_data {
3754 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3758 /* Calculate the amount of buffer space needed for the
3759 * vnic client data in the login buffer. There are four entries,
3760 * OS name, LPAR name, device name, and a null last entry.
3762 len = 4 * sizeof(struct vnic_login_client_data);
3763 len += 6; /* "Linux" plus NULL */
3764 len += strlen(utsname()->nodename) + 1;
3765 len += strlen(adapter->netdev->name) + 1;
3770 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3771 struct vnic_login_client_data *vlcd)
3773 const char *os_name = "Linux";
3776 /* Type 1 - LPAR OS */
3778 len = strlen(os_name) + 1;
3779 vlcd->len = cpu_to_be16(len);
3780 strncpy(vlcd->name, os_name, len);
3781 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3783 /* Type 2 - LPAR name */
3785 len = strlen(utsname()->nodename) + 1;
3786 vlcd->len = cpu_to_be16(len);
3787 strncpy(vlcd->name, utsname()->nodename, len);
3788 vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3790 /* Type 3 - device name */
3792 len = strlen(adapter->netdev->name) + 1;
3793 vlcd->len = cpu_to_be16(len);
3794 strncpy(vlcd->name, adapter->netdev->name, len);
3797 static int send_login(struct ibmvnic_adapter *adapter)
3799 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3800 struct ibmvnic_login_buffer *login_buffer;
3801 struct device *dev = &adapter->vdev->dev;
3802 struct vnic_login_client_data *vlcd;
3803 dma_addr_t rsp_buffer_token;
3804 dma_addr_t buffer_token;
3805 size_t rsp_buffer_size;
3806 union ibmvnic_crq crq;
3807 int client_data_len;
3814 if (!adapter->tx_scrq || !adapter->rx_scrq) {
3815 netdev_err(adapter->netdev,
3816 "RX or TX queues are not allocated, device login failed\n");
3820 release_login_buffer(adapter);
3821 release_login_rsp_buffer(adapter);
3823 client_data_len = vnic_client_data_len(adapter);
3826 sizeof(struct ibmvnic_login_buffer) +
3827 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3830 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3832 goto buf_alloc_failed;
3834 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3836 if (dma_mapping_error(dev, buffer_token)) {
3837 dev_err(dev, "Couldn't map login buffer\n");
3838 goto buf_map_failed;
3841 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3842 sizeof(u64) * adapter->req_tx_queues +
3843 sizeof(u64) * adapter->req_rx_queues +
3844 sizeof(u64) * adapter->req_rx_queues +
3845 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3847 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3848 if (!login_rsp_buffer)
3849 goto buf_rsp_alloc_failed;
3851 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3852 rsp_buffer_size, DMA_FROM_DEVICE);
3853 if (dma_mapping_error(dev, rsp_buffer_token)) {
3854 dev_err(dev, "Couldn't map login rsp buffer\n");
3855 goto buf_rsp_map_failed;
3858 adapter->login_buf = login_buffer;
3859 adapter->login_buf_token = buffer_token;
3860 adapter->login_buf_sz = buffer_size;
3861 adapter->login_rsp_buf = login_rsp_buffer;
3862 adapter->login_rsp_buf_token = rsp_buffer_token;
3863 adapter->login_rsp_buf_sz = rsp_buffer_size;
3865 login_buffer->len = cpu_to_be32(buffer_size);
3866 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3867 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3868 login_buffer->off_txcomp_subcrqs =
3869 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3870 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3871 login_buffer->off_rxcomp_subcrqs =
3872 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3873 sizeof(u64) * adapter->req_tx_queues);
3874 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3875 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3877 tx_list_p = (__be64 *)((char *)login_buffer +
3878 sizeof(struct ibmvnic_login_buffer));
3879 rx_list_p = (__be64 *)((char *)login_buffer +
3880 sizeof(struct ibmvnic_login_buffer) +
3881 sizeof(u64) * adapter->req_tx_queues);
3883 for (i = 0; i < adapter->req_tx_queues; i++) {
3884 if (adapter->tx_scrq[i]) {
3886 cpu_to_be64(adapter->tx_scrq[i]->crq_num);
3890 for (i = 0; i < adapter->req_rx_queues; i++) {
3891 if (adapter->rx_scrq[i]) {
3893 cpu_to_be64(adapter->rx_scrq[i]->crq_num);
3897 /* Insert vNIC login client data */
3898 vlcd = (struct vnic_login_client_data *)
3899 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3900 login_buffer->client_data_offset =
3901 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3902 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3904 vnic_add_client_data(adapter, vlcd);
3906 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3907 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3908 netdev_dbg(adapter->netdev, "%016lx\n",
3909 ((unsigned long *)(adapter->login_buf))[i]);
3912 memset(&crq, 0, sizeof(crq));
3913 crq.login.first = IBMVNIC_CRQ_CMD;
3914 crq.login.cmd = LOGIN;
3915 crq.login.ioba = cpu_to_be32(buffer_token);
3916 crq.login.len = cpu_to_be32(buffer_size);
3918 adapter->login_pending = true;
3919 rc = ibmvnic_send_crq(adapter, &crq);
3921 adapter->login_pending = false;
3922 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc);
3923 goto buf_rsp_map_failed;
3929 kfree(login_rsp_buffer);
3930 adapter->login_rsp_buf = NULL;
3931 buf_rsp_alloc_failed:
3932 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3934 kfree(login_buffer);
3935 adapter->login_buf = NULL;
3940 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3943 union ibmvnic_crq crq;
3945 memset(&crq, 0, sizeof(crq));
3946 crq.request_map.first = IBMVNIC_CRQ_CMD;
3947 crq.request_map.cmd = REQUEST_MAP;
3948 crq.request_map.map_id = map_id;
3949 crq.request_map.ioba = cpu_to_be32(addr);
3950 crq.request_map.len = cpu_to_be32(len);
3951 return ibmvnic_send_crq(adapter, &crq);
3954 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3956 union ibmvnic_crq crq;
3958 memset(&crq, 0, sizeof(crq));
3959 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3960 crq.request_unmap.cmd = REQUEST_UNMAP;
3961 crq.request_unmap.map_id = map_id;
3962 return ibmvnic_send_crq(adapter, &crq);
3965 static void send_query_map(struct ibmvnic_adapter *adapter)
3967 union ibmvnic_crq crq;
3969 memset(&crq, 0, sizeof(crq));
3970 crq.query_map.first = IBMVNIC_CRQ_CMD;
3971 crq.query_map.cmd = QUERY_MAP;
3972 ibmvnic_send_crq(adapter, &crq);
3975 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3976 static void send_query_cap(struct ibmvnic_adapter *adapter)
3978 union ibmvnic_crq crq;
3980 atomic_set(&adapter->running_cap_crqs, 0);
3981 memset(&crq, 0, sizeof(crq));
3982 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3983 crq.query_capability.cmd = QUERY_CAPABILITY;
3985 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3986 atomic_inc(&adapter->running_cap_crqs);
3987 ibmvnic_send_crq(adapter, &crq);
3989 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3990 atomic_inc(&adapter->running_cap_crqs);
3991 ibmvnic_send_crq(adapter, &crq);
3993 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3994 atomic_inc(&adapter->running_cap_crqs);
3995 ibmvnic_send_crq(adapter, &crq);
3997 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3998 atomic_inc(&adapter->running_cap_crqs);
3999 ibmvnic_send_crq(adapter, &crq);
4001 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
4002 atomic_inc(&adapter->running_cap_crqs);
4003 ibmvnic_send_crq(adapter, &crq);
4005 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
4006 atomic_inc(&adapter->running_cap_crqs);
4007 ibmvnic_send_crq(adapter, &crq);
4009 crq.query_capability.capability =
4010 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
4011 atomic_inc(&adapter->running_cap_crqs);
4012 ibmvnic_send_crq(adapter, &crq);
4014 crq.query_capability.capability =
4015 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
4016 atomic_inc(&adapter->running_cap_crqs);
4017 ibmvnic_send_crq(adapter, &crq);
4019 crq.query_capability.capability =
4020 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
4021 atomic_inc(&adapter->running_cap_crqs);
4022 ibmvnic_send_crq(adapter, &crq);
4024 crq.query_capability.capability =
4025 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
4026 atomic_inc(&adapter->running_cap_crqs);
4027 ibmvnic_send_crq(adapter, &crq);
4029 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
4030 atomic_inc(&adapter->running_cap_crqs);
4031 ibmvnic_send_crq(adapter, &crq);
4033 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
4034 atomic_inc(&adapter->running_cap_crqs);
4035 ibmvnic_send_crq(adapter, &crq);
4037 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
4038 atomic_inc(&adapter->running_cap_crqs);
4039 ibmvnic_send_crq(adapter, &crq);
4041 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
4042 atomic_inc(&adapter->running_cap_crqs);
4043 ibmvnic_send_crq(adapter, &crq);
4045 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
4046 atomic_inc(&adapter->running_cap_crqs);
4047 ibmvnic_send_crq(adapter, &crq);
4049 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
4050 atomic_inc(&adapter->running_cap_crqs);
4051 ibmvnic_send_crq(adapter, &crq);
4053 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
4054 atomic_inc(&adapter->running_cap_crqs);
4055 ibmvnic_send_crq(adapter, &crq);
4057 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
4058 atomic_inc(&adapter->running_cap_crqs);
4059 ibmvnic_send_crq(adapter, &crq);
4061 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
4062 atomic_inc(&adapter->running_cap_crqs);
4063 ibmvnic_send_crq(adapter, &crq);
4065 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
4066 atomic_inc(&adapter->running_cap_crqs);
4067 ibmvnic_send_crq(adapter, &crq);
4069 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
4070 atomic_inc(&adapter->running_cap_crqs);
4071 ibmvnic_send_crq(adapter, &crq);
4073 crq.query_capability.capability =
4074 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
4075 atomic_inc(&adapter->running_cap_crqs);
4076 ibmvnic_send_crq(adapter, &crq);
4078 crq.query_capability.capability =
4079 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
4080 atomic_inc(&adapter->running_cap_crqs);
4081 ibmvnic_send_crq(adapter, &crq);
4083 crq.query_capability.capability =
4084 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
4085 atomic_inc(&adapter->running_cap_crqs);
4086 ibmvnic_send_crq(adapter, &crq);
4088 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
4089 atomic_inc(&adapter->running_cap_crqs);
4090 ibmvnic_send_crq(adapter, &crq);
4093 static void send_query_ip_offload(struct ibmvnic_adapter *adapter)
4095 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4096 struct device *dev = &adapter->vdev->dev;
4097 union ibmvnic_crq crq;
4099 adapter->ip_offload_tok =
4101 &adapter->ip_offload_buf,
4105 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4106 if (!firmware_has_feature(FW_FEATURE_CMO))
4107 dev_err(dev, "Couldn't map offload buffer\n");
4111 memset(&crq, 0, sizeof(crq));
4112 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4113 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4114 crq.query_ip_offload.len = cpu_to_be32(buf_sz);
4115 crq.query_ip_offload.ioba =
4116 cpu_to_be32(adapter->ip_offload_tok);
4118 ibmvnic_send_crq(adapter, &crq);
4121 static void send_control_ip_offload(struct ibmvnic_adapter *adapter)
4123 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl;
4124 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4125 struct device *dev = &adapter->vdev->dev;
4126 netdev_features_t old_hw_features = 0;
4127 union ibmvnic_crq crq;
4129 adapter->ip_offload_ctrl_tok =
4132 sizeof(adapter->ip_offload_ctrl),
4135 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4136 dev_err(dev, "Couldn't map ip offload control buffer\n");
4140 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4141 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB);
4142 ctrl_buf->ipv4_chksum = buf->ipv4_chksum;
4143 ctrl_buf->ipv6_chksum = buf->ipv6_chksum;
4144 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4145 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum;
4146 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4147 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum;
4148 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4;
4149 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6;
4151 /* large_rx disabled for now, additional features needed */
4152 ctrl_buf->large_rx_ipv4 = 0;
4153 ctrl_buf->large_rx_ipv6 = 0;
4155 if (adapter->state != VNIC_PROBING) {
4156 old_hw_features = adapter->netdev->hw_features;
4157 adapter->netdev->hw_features = 0;
4160 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4162 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4163 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4165 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4166 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4168 if ((adapter->netdev->features &
4169 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4170 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4172 if (buf->large_tx_ipv4)
4173 adapter->netdev->hw_features |= NETIF_F_TSO;
4174 if (buf->large_tx_ipv6)
4175 adapter->netdev->hw_features |= NETIF_F_TSO6;
4177 if (adapter->state == VNIC_PROBING) {
4178 adapter->netdev->features |= adapter->netdev->hw_features;
4179 } else if (old_hw_features != adapter->netdev->hw_features) {
4180 netdev_features_t tmp = 0;
4182 /* disable features no longer supported */
4183 adapter->netdev->features &= adapter->netdev->hw_features;
4184 /* turn on features now supported if previously enabled */
4185 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4186 adapter->netdev->hw_features;
4187 adapter->netdev->features |=
4188 tmp & adapter->netdev->wanted_features;
4191 memset(&crq, 0, sizeof(crq));
4192 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4193 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4194 crq.control_ip_offload.len =
4195 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4196 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4197 ibmvnic_send_crq(adapter, &crq);
4200 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
4201 struct ibmvnic_adapter *adapter)
4203 struct device *dev = &adapter->vdev->dev;
4205 if (crq->get_vpd_size_rsp.rc.code) {
4206 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
4207 crq->get_vpd_size_rsp.rc.code);
4208 complete(&adapter->fw_done);
4212 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
4213 complete(&adapter->fw_done);
4216 static void handle_vpd_rsp(union ibmvnic_crq *crq,
4217 struct ibmvnic_adapter *adapter)
4219 struct device *dev = &adapter->vdev->dev;
4220 unsigned char *substr = NULL;
4221 u8 fw_level_len = 0;
4223 memset(adapter->fw_version, 0, 32);
4225 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
4228 if (crq->get_vpd_rsp.rc.code) {
4229 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
4230 crq->get_vpd_rsp.rc.code);
4234 /* get the position of the firmware version info
4235 * located after the ASCII 'RM' substring in the buffer
4237 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
4239 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4243 /* get length of firmware level ASCII substring */
4244 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
4245 fw_level_len = *(substr + 2);
4247 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
4251 /* copy firmware version string from vpd into adapter */
4252 if ((substr + 3 + fw_level_len) <
4253 (adapter->vpd->buff + adapter->vpd->len)) {
4254 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4256 dev_info(dev, "FW substr extrapolated VPD buff\n");
4260 if (adapter->fw_version[0] == '\0')
4261 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4262 complete(&adapter->fw_done);
4265 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
4267 struct device *dev = &adapter->vdev->dev;
4268 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4271 dma_unmap_single(dev, adapter->ip_offload_tok,
4272 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
4274 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
4275 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
4276 netdev_dbg(adapter->netdev, "%016lx\n",
4277 ((unsigned long *)(buf))[i]);
4279 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4280 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4281 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4282 buf->tcp_ipv4_chksum);
4283 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4284 buf->tcp_ipv6_chksum);
4285 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4286 buf->udp_ipv4_chksum);
4287 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4288 buf->udp_ipv6_chksum);
4289 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4290 buf->large_tx_ipv4);
4291 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4292 buf->large_tx_ipv6);
4293 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4294 buf->large_rx_ipv4);
4295 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4296 buf->large_rx_ipv6);
4297 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4298 buf->max_ipv4_header_size);
4299 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4300 buf->max_ipv6_header_size);
4301 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4302 buf->max_tcp_header_size);
4303 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4304 buf->max_udp_header_size);
4305 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4306 buf->max_large_tx_size);
4307 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4308 buf->max_large_rx_size);
4309 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4310 buf->ipv6_extension_header);
4311 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4312 buf->tcp_pseudosum_req);
4313 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4314 buf->num_ipv6_ext_headers);
4315 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4316 buf->off_ipv6_ext_headers);
4318 send_control_ip_offload(adapter);
4321 static const char *ibmvnic_fw_err_cause(u16 cause)
4324 case ADAPTER_PROBLEM:
4325 return "adapter problem";
4327 return "bus problem";
4329 return "firmware problem";
4331 return "device driver problem";
4333 return "EEH recovery";
4335 return "firmware updated";
4337 return "low Memory";
4343 static void handle_error_indication(union ibmvnic_crq *crq,
4344 struct ibmvnic_adapter *adapter)
4346 struct device *dev = &adapter->vdev->dev;
4349 cause = be16_to_cpu(crq->error_indication.error_cause);
4351 dev_warn_ratelimited(dev,
4352 "Firmware reports %serror, cause: %s. Starting recovery...\n",
4353 crq->error_indication.flags
4354 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4355 ibmvnic_fw_err_cause(cause));
4357 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4358 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4360 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4363 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4364 struct ibmvnic_adapter *adapter)
4366 struct net_device *netdev = adapter->netdev;
4367 struct device *dev = &adapter->vdev->dev;
4370 rc = crq->change_mac_addr_rsp.rc.code;
4372 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4375 /* crq->change_mac_addr.mac_addr is the requested one
4376 * crq->change_mac_addr_rsp.mac_addr is the returned valid one.
4378 ether_addr_copy(netdev->dev_addr,
4379 &crq->change_mac_addr_rsp.mac_addr[0]);
4380 ether_addr_copy(adapter->mac_addr,
4381 &crq->change_mac_addr_rsp.mac_addr[0]);
4383 complete(&adapter->fw_done);
4387 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4388 struct ibmvnic_adapter *adapter)
4390 struct device *dev = &adapter->vdev->dev;
4394 atomic_dec(&adapter->running_cap_crqs);
4395 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4397 req_value = &adapter->req_tx_queues;
4401 req_value = &adapter->req_rx_queues;
4404 case REQ_RX_ADD_QUEUES:
4405 req_value = &adapter->req_rx_add_queues;
4408 case REQ_TX_ENTRIES_PER_SUBCRQ:
4409 req_value = &adapter->req_tx_entries_per_subcrq;
4410 name = "tx_entries_per_subcrq";
4412 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4413 req_value = &adapter->req_rx_add_entries_per_subcrq;
4414 name = "rx_add_entries_per_subcrq";
4417 req_value = &adapter->req_mtu;
4420 case PROMISC_REQUESTED:
4421 req_value = &adapter->promisc;
4425 dev_err(dev, "Got invalid cap request rsp %d\n",
4426 crq->request_capability.capability);
4430 switch (crq->request_capability_rsp.rc.code) {
4433 case PARTIALSUCCESS:
4434 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4436 (long)be64_to_cpu(crq->request_capability_rsp.number),
4439 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4441 pr_err("mtu of %llu is not supported. Reverting.\n",
4443 *req_value = adapter->fallback.mtu;
4446 be64_to_cpu(crq->request_capability_rsp.number);
4449 send_request_cap(adapter, 1);
4452 dev_err(dev, "Error %d in request cap rsp\n",
4453 crq->request_capability_rsp.rc.code);
4457 /* Done receiving requested capabilities, query IP offload support */
4458 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4459 adapter->wait_capability = false;
4460 send_query_ip_offload(adapter);
4464 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4465 struct ibmvnic_adapter *adapter)
4467 struct device *dev = &adapter->vdev->dev;
4468 struct net_device *netdev = adapter->netdev;
4469 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4470 struct ibmvnic_login_buffer *login = adapter->login_buf;
4471 u64 *tx_handle_array;
4472 u64 *rx_handle_array;
4478 /* CHECK: Test/set of login_pending does not need to be atomic
4479 * because only ibmvnic_tasklet tests/clears this.
4481 if (!adapter->login_pending) {
4482 netdev_warn(netdev, "Ignoring unexpected login response\n");
4485 adapter->login_pending = false;
4487 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4489 dma_unmap_single(dev, adapter->login_rsp_buf_token,
4490 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4492 /* If the number of queues requested can't be allocated by the
4493 * server, the login response will return with code 1. We will need
4494 * to resend the login buffer with fewer queues requested.
4496 if (login_rsp_crq->generic.rc.code) {
4497 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4498 complete(&adapter->init_done);
4502 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4504 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4505 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4506 netdev_dbg(adapter->netdev, "%016lx\n",
4507 ((unsigned long *)(adapter->login_rsp_buf))[i]);
4511 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4512 (be32_to_cpu(login->num_rxcomp_subcrqs) *
4513 adapter->req_rx_add_queues !=
4514 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4515 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4516 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4519 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4520 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
4521 /* variable buffer sizes are not supported, so just read the
4524 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]);
4526 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
4527 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4529 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4530 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
4531 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4532 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
4534 for (i = 0; i < num_tx_pools; i++)
4535 adapter->tx_scrq[i]->handle = tx_handle_array[i];
4537 for (i = 0; i < num_rx_pools; i++)
4538 adapter->rx_scrq[i]->handle = rx_handle_array[i];
4540 adapter->num_active_tx_scrqs = num_tx_pools;
4541 adapter->num_active_rx_scrqs = num_rx_pools;
4542 release_login_rsp_buffer(adapter);
4543 release_login_buffer(adapter);
4544 complete(&adapter->init_done);
4549 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4550 struct ibmvnic_adapter *adapter)
4552 struct device *dev = &adapter->vdev->dev;
4555 rc = crq->request_unmap_rsp.rc.code;
4557 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4560 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4561 struct ibmvnic_adapter *adapter)
4563 struct net_device *netdev = adapter->netdev;
4564 struct device *dev = &adapter->vdev->dev;
4567 rc = crq->query_map_rsp.rc.code;
4569 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4572 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4573 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4574 crq->query_map_rsp.free_pages);
4577 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4578 struct ibmvnic_adapter *adapter)
4580 struct net_device *netdev = adapter->netdev;
4581 struct device *dev = &adapter->vdev->dev;
4584 atomic_dec(&adapter->running_cap_crqs);
4585 netdev_dbg(netdev, "Outstanding queries: %d\n",
4586 atomic_read(&adapter->running_cap_crqs));
4587 rc = crq->query_capability.rc.code;
4589 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4593 switch (be16_to_cpu(crq->query_capability.capability)) {
4595 adapter->min_tx_queues =
4596 be64_to_cpu(crq->query_capability.number);
4597 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4598 adapter->min_tx_queues);
4601 adapter->min_rx_queues =
4602 be64_to_cpu(crq->query_capability.number);
4603 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4604 adapter->min_rx_queues);
4606 case MIN_RX_ADD_QUEUES:
4607 adapter->min_rx_add_queues =
4608 be64_to_cpu(crq->query_capability.number);
4609 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4610 adapter->min_rx_add_queues);
4613 adapter->max_tx_queues =
4614 be64_to_cpu(crq->query_capability.number);
4615 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4616 adapter->max_tx_queues);
4619 adapter->max_rx_queues =
4620 be64_to_cpu(crq->query_capability.number);
4621 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4622 adapter->max_rx_queues);
4624 case MAX_RX_ADD_QUEUES:
4625 adapter->max_rx_add_queues =
4626 be64_to_cpu(crq->query_capability.number);
4627 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4628 adapter->max_rx_add_queues);
4630 case MIN_TX_ENTRIES_PER_SUBCRQ:
4631 adapter->min_tx_entries_per_subcrq =
4632 be64_to_cpu(crq->query_capability.number);
4633 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4634 adapter->min_tx_entries_per_subcrq);
4636 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4637 adapter->min_rx_add_entries_per_subcrq =
4638 be64_to_cpu(crq->query_capability.number);
4639 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4640 adapter->min_rx_add_entries_per_subcrq);
4642 case MAX_TX_ENTRIES_PER_SUBCRQ:
4643 adapter->max_tx_entries_per_subcrq =
4644 be64_to_cpu(crq->query_capability.number);
4645 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4646 adapter->max_tx_entries_per_subcrq);
4648 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4649 adapter->max_rx_add_entries_per_subcrq =
4650 be64_to_cpu(crq->query_capability.number);
4651 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4652 adapter->max_rx_add_entries_per_subcrq);
4654 case TCP_IP_OFFLOAD:
4655 adapter->tcp_ip_offload =
4656 be64_to_cpu(crq->query_capability.number);
4657 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4658 adapter->tcp_ip_offload);
4660 case PROMISC_SUPPORTED:
4661 adapter->promisc_supported =
4662 be64_to_cpu(crq->query_capability.number);
4663 netdev_dbg(netdev, "promisc_supported = %lld\n",
4664 adapter->promisc_supported);
4667 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4668 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4669 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4672 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4673 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4674 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4676 case MAX_MULTICAST_FILTERS:
4677 adapter->max_multicast_filters =
4678 be64_to_cpu(crq->query_capability.number);
4679 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4680 adapter->max_multicast_filters);
4682 case VLAN_HEADER_INSERTION:
4683 adapter->vlan_header_insertion =
4684 be64_to_cpu(crq->query_capability.number);
4685 if (adapter->vlan_header_insertion)
4686 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4687 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4688 adapter->vlan_header_insertion);
4690 case RX_VLAN_HEADER_INSERTION:
4691 adapter->rx_vlan_header_insertion =
4692 be64_to_cpu(crq->query_capability.number);
4693 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4694 adapter->rx_vlan_header_insertion);
4696 case MAX_TX_SG_ENTRIES:
4697 adapter->max_tx_sg_entries =
4698 be64_to_cpu(crq->query_capability.number);
4699 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4700 adapter->max_tx_sg_entries);
4702 case RX_SG_SUPPORTED:
4703 adapter->rx_sg_supported =
4704 be64_to_cpu(crq->query_capability.number);
4705 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4706 adapter->rx_sg_supported);
4708 case OPT_TX_COMP_SUB_QUEUES:
4709 adapter->opt_tx_comp_sub_queues =
4710 be64_to_cpu(crq->query_capability.number);
4711 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4712 adapter->opt_tx_comp_sub_queues);
4714 case OPT_RX_COMP_QUEUES:
4715 adapter->opt_rx_comp_queues =
4716 be64_to_cpu(crq->query_capability.number);
4717 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4718 adapter->opt_rx_comp_queues);
4720 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4721 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4722 be64_to_cpu(crq->query_capability.number);
4723 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4724 adapter->opt_rx_bufadd_q_per_rx_comp_q);
4726 case OPT_TX_ENTRIES_PER_SUBCRQ:
4727 adapter->opt_tx_entries_per_subcrq =
4728 be64_to_cpu(crq->query_capability.number);
4729 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4730 adapter->opt_tx_entries_per_subcrq);
4732 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4733 adapter->opt_rxba_entries_per_subcrq =
4734 be64_to_cpu(crq->query_capability.number);
4735 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4736 adapter->opt_rxba_entries_per_subcrq);
4738 case TX_RX_DESC_REQ:
4739 adapter->tx_rx_desc_req = crq->query_capability.number;
4740 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4741 adapter->tx_rx_desc_req);
4745 netdev_err(netdev, "Got invalid cap rsp %d\n",
4746 crq->query_capability.capability);
4750 if (atomic_read(&adapter->running_cap_crqs) == 0) {
4751 adapter->wait_capability = false;
4752 send_request_cap(adapter, 0);
4756 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4758 union ibmvnic_crq crq;
4761 memset(&crq, 0, sizeof(crq));
4762 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4763 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4765 mutex_lock(&adapter->fw_lock);
4766 adapter->fw_done_rc = 0;
4767 reinit_completion(&adapter->fw_done);
4769 rc = ibmvnic_send_crq(adapter, &crq);
4771 mutex_unlock(&adapter->fw_lock);
4775 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4777 mutex_unlock(&adapter->fw_lock);
4781 mutex_unlock(&adapter->fw_lock);
4782 return adapter->fw_done_rc ? -EIO : 0;
4785 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4786 struct ibmvnic_adapter *adapter)
4788 struct net_device *netdev = adapter->netdev;
4790 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
4792 rc = crq->query_phys_parms_rsp.rc.code;
4794 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4798 case IBMVNIC_10MBPS:
4799 adapter->speed = SPEED_10;
4801 case IBMVNIC_100MBPS:
4802 adapter->speed = SPEED_100;
4805 adapter->speed = SPEED_1000;
4807 case IBMVNIC_10GBPS:
4808 adapter->speed = SPEED_10000;
4810 case IBMVNIC_25GBPS:
4811 adapter->speed = SPEED_25000;
4813 case IBMVNIC_40GBPS:
4814 adapter->speed = SPEED_40000;
4816 case IBMVNIC_50GBPS:
4817 adapter->speed = SPEED_50000;
4819 case IBMVNIC_100GBPS:
4820 adapter->speed = SPEED_100000;
4822 case IBMVNIC_200GBPS:
4823 adapter->speed = SPEED_200000;
4826 if (netif_carrier_ok(netdev))
4827 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
4828 adapter->speed = SPEED_UNKNOWN;
4830 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4831 adapter->duplex = DUPLEX_FULL;
4832 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4833 adapter->duplex = DUPLEX_HALF;
4835 adapter->duplex = DUPLEX_UNKNOWN;
4840 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4841 struct ibmvnic_adapter *adapter)
4843 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4844 struct net_device *netdev = adapter->netdev;
4845 struct device *dev = &adapter->vdev->dev;
4846 u64 *u64_crq = (u64 *)crq;
4849 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4850 (unsigned long)cpu_to_be64(u64_crq[0]),
4851 (unsigned long)cpu_to_be64(u64_crq[1]));
4852 switch (gen_crq->first) {
4853 case IBMVNIC_CRQ_INIT_RSP:
4854 switch (gen_crq->cmd) {
4855 case IBMVNIC_CRQ_INIT:
4856 dev_info(dev, "Partner initialized\n");
4857 adapter->from_passive_init = true;
4858 /* Discard any stale login responses from prev reset.
4859 * CHECK: should we clear even on INIT_COMPLETE?
4861 adapter->login_pending = false;
4863 if (!completion_done(&adapter->init_done)) {
4864 complete(&adapter->init_done);
4865 adapter->init_done_rc = -EIO;
4867 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4868 if (rc && rc != -EBUSY) {
4869 /* We were unable to schedule the failover
4870 * reset either because the adapter was still
4871 * probing (eg: during kexec) or we could not
4872 * allocate memory. Clear the failover_pending
4873 * flag since no one else will. We ignore
4874 * EBUSY because it means either FAILOVER reset
4875 * is already scheduled or the adapter is
4879 "Error %ld scheduling failover reset\n",
4881 adapter->failover_pending = false;
4884 case IBMVNIC_CRQ_INIT_COMPLETE:
4885 dev_info(dev, "Partner initialization complete\n");
4886 adapter->crq.active = true;
4887 send_version_xchg(adapter);
4890 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4893 case IBMVNIC_CRQ_XPORT_EVENT:
4894 netif_carrier_off(netdev);
4895 adapter->crq.active = false;
4896 /* terminate any thread waiting for a response
4899 if (!completion_done(&adapter->fw_done)) {
4900 adapter->fw_done_rc = -EIO;
4901 complete(&adapter->fw_done);
4903 if (!completion_done(&adapter->stats_done))
4904 complete(&adapter->stats_done);
4905 if (test_bit(0, &adapter->resetting))
4906 adapter->force_reset_recovery = true;
4907 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4908 dev_info(dev, "Migrated, re-enabling adapter\n");
4909 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4910 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4911 dev_info(dev, "Backing device failover detected\n");
4912 adapter->failover_pending = true;
4914 /* The adapter lost the connection */
4915 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4917 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4920 case IBMVNIC_CRQ_CMD_RSP:
4923 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4928 switch (gen_crq->cmd) {
4929 case VERSION_EXCHANGE_RSP:
4930 rc = crq->version_exchange_rsp.rc.code;
4932 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4936 be16_to_cpu(crq->version_exchange_rsp.version);
4937 dev_info(dev, "Partner protocol version is %d\n",
4939 send_query_cap(adapter);
4941 case QUERY_CAPABILITY_RSP:
4942 handle_query_cap_rsp(crq, adapter);
4945 handle_query_map_rsp(crq, adapter);
4947 case REQUEST_MAP_RSP:
4948 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4949 complete(&adapter->fw_done);
4951 case REQUEST_UNMAP_RSP:
4952 handle_request_unmap_rsp(crq, adapter);
4954 case REQUEST_CAPABILITY_RSP:
4955 handle_request_cap_rsp(crq, adapter);
4958 netdev_dbg(netdev, "Got Login Response\n");
4959 handle_login_rsp(crq, adapter);
4961 case LOGICAL_LINK_STATE_RSP:
4963 "Got Logical Link State Response, state: %d rc: %d\n",
4964 crq->logical_link_state_rsp.link_state,
4965 crq->logical_link_state_rsp.rc.code);
4966 adapter->logical_link_state =
4967 crq->logical_link_state_rsp.link_state;
4968 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4969 complete(&adapter->init_done);
4971 case LINK_STATE_INDICATION:
4972 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4973 adapter->phys_link_state =
4974 crq->link_state_indication.phys_link_state;
4975 adapter->logical_link_state =
4976 crq->link_state_indication.logical_link_state;
4977 if (adapter->phys_link_state && adapter->logical_link_state)
4978 netif_carrier_on(netdev);
4980 netif_carrier_off(netdev);
4982 case CHANGE_MAC_ADDR_RSP:
4983 netdev_dbg(netdev, "Got MAC address change Response\n");
4984 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4986 case ERROR_INDICATION:
4987 netdev_dbg(netdev, "Got Error Indication\n");
4988 handle_error_indication(crq, adapter);
4990 case REQUEST_STATISTICS_RSP:
4991 netdev_dbg(netdev, "Got Statistics Response\n");
4992 complete(&adapter->stats_done);
4994 case QUERY_IP_OFFLOAD_RSP:
4995 netdev_dbg(netdev, "Got Query IP offload Response\n");
4996 handle_query_ip_offload_rsp(adapter);
4998 case MULTICAST_CTRL_RSP:
4999 netdev_dbg(netdev, "Got multicast control Response\n");
5001 case CONTROL_IP_OFFLOAD_RSP:
5002 netdev_dbg(netdev, "Got Control IP offload Response\n");
5003 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
5004 sizeof(adapter->ip_offload_ctrl),
5006 complete(&adapter->init_done);
5008 case COLLECT_FW_TRACE_RSP:
5009 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
5010 complete(&adapter->fw_done);
5012 case GET_VPD_SIZE_RSP:
5013 handle_vpd_size_rsp(crq, adapter);
5016 handle_vpd_rsp(crq, adapter);
5018 case QUERY_PHYS_PARMS_RSP:
5019 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
5020 complete(&adapter->fw_done);
5023 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
5028 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
5030 struct ibmvnic_adapter *adapter = instance;
5032 tasklet_schedule(&adapter->tasklet);
5036 static void ibmvnic_tasklet(struct tasklet_struct *t)
5038 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet);
5039 struct ibmvnic_crq_queue *queue = &adapter->crq;
5040 union ibmvnic_crq *crq;
5041 unsigned long flags;
5044 spin_lock_irqsave(&queue->lock, flags);
5046 /* Pull all the valid messages off the CRQ */
5047 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
5048 /* This barrier makes sure ibmvnic_next_crq()'s
5049 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
5050 * before ibmvnic_handle_crq()'s
5051 * switch(gen_crq->first) and switch(gen_crq->cmd).
5054 ibmvnic_handle_crq(crq, adapter);
5055 crq->generic.first = 0;
5058 /* remain in tasklet until all
5059 * capabilities responses are received
5061 if (!adapter->wait_capability)
5064 /* if capabilities CRQ's were sent in this tasklet, the following
5065 * tasklet must wait until all responses are received
5067 if (atomic_read(&adapter->running_cap_crqs) != 0)
5068 adapter->wait_capability = true;
5069 spin_unlock_irqrestore(&queue->lock, flags);
5072 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
5074 struct vio_dev *vdev = adapter->vdev;
5078 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
5079 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
5082 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
5087 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
5089 struct ibmvnic_crq_queue *crq = &adapter->crq;
5090 struct device *dev = &adapter->vdev->dev;
5091 struct vio_dev *vdev = adapter->vdev;
5096 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5097 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5099 /* Clean out the queue */
5103 memset(crq->msgs, 0, PAGE_SIZE);
5105 crq->active = false;
5107 /* And re-open it again */
5108 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5109 crq->msg_token, PAGE_SIZE);
5112 /* Adapter is good, but other end is not ready */
5113 dev_warn(dev, "Partner adapter not ready\n");
5115 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
5120 static void release_crq_queue(struct ibmvnic_adapter *adapter)
5122 struct ibmvnic_crq_queue *crq = &adapter->crq;
5123 struct vio_dev *vdev = adapter->vdev;
5129 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
5130 free_irq(vdev->irq, adapter);
5131 tasklet_kill(&adapter->tasklet);
5133 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5134 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5136 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
5138 free_page((unsigned long)crq->msgs);
5140 crq->active = false;
5143 static int init_crq_queue(struct ibmvnic_adapter *adapter)
5145 struct ibmvnic_crq_queue *crq = &adapter->crq;
5146 struct device *dev = &adapter->vdev->dev;
5147 struct vio_dev *vdev = adapter->vdev;
5148 int rc, retrc = -ENOMEM;
5153 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
5154 /* Should we allocate more than one page? */
5159 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
5160 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
5162 if (dma_mapping_error(dev, crq->msg_token))
5165 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
5166 crq->msg_token, PAGE_SIZE);
5168 if (rc == H_RESOURCE)
5169 /* maybe kexecing and resource is busy. try a reset */
5170 rc = ibmvnic_reset_crq(adapter);
5173 if (rc == H_CLOSED) {
5174 dev_warn(dev, "Partner adapter not ready\n");
5176 dev_warn(dev, "Error %d opening adapter\n", rc);
5177 goto reg_crq_failed;
5182 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet);
5184 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
5185 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
5186 adapter->vdev->unit_address);
5187 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
5189 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
5191 goto req_irq_failed;
5194 rc = vio_enable_interrupts(vdev);
5196 dev_err(dev, "Error %d enabling interrupts\n", rc);
5197 goto req_irq_failed;
5201 spin_lock_init(&crq->lock);
5206 tasklet_kill(&adapter->tasklet);
5208 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5209 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5211 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
5213 free_page((unsigned long)crq->msgs);
5218 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset)
5220 struct device *dev = &adapter->vdev->dev;
5221 unsigned long timeout = msecs_to_jiffies(20000);
5222 u64 old_num_rx_queues = adapter->req_rx_queues;
5223 u64 old_num_tx_queues = adapter->req_tx_queues;
5226 adapter->from_passive_init = false;
5229 reinit_completion(&adapter->init_done);
5231 adapter->init_done_rc = 0;
5232 rc = ibmvnic_send_crq_init(adapter);
5234 dev_err(dev, "Send crq init failed with error %d\n", rc);
5238 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5239 dev_err(dev, "Initialization sequence timed out\n");
5243 if (adapter->init_done_rc) {
5244 release_crq_queue(adapter);
5245 return adapter->init_done_rc;
5248 if (adapter->from_passive_init) {
5249 adapter->state = VNIC_OPEN;
5250 adapter->from_passive_init = false;
5255 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
5256 adapter->reset_reason != VNIC_RESET_MOBILITY) {
5257 if (adapter->req_rx_queues != old_num_rx_queues ||
5258 adapter->req_tx_queues != old_num_tx_queues) {
5259 release_sub_crqs(adapter, 0);
5260 rc = init_sub_crqs(adapter);
5262 rc = reset_sub_crq_queues(adapter);
5265 rc = init_sub_crqs(adapter);
5269 dev_err(dev, "Initialization of sub crqs failed\n");
5270 release_crq_queue(adapter);
5274 rc = init_sub_crq_irqs(adapter);
5276 dev_err(dev, "Failed to initialize sub crq irqs\n");
5277 release_crq_queue(adapter);
5283 static struct device_attribute dev_attr_failover;
5285 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5287 struct ibmvnic_adapter *adapter;
5288 struct net_device *netdev;
5289 unsigned char *mac_addr_p;
5292 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5295 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5296 VETH_MAC_ADDR, NULL);
5299 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5300 __FILE__, __LINE__);
5304 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5305 IBMVNIC_MAX_QUEUES);
5309 adapter = netdev_priv(netdev);
5310 adapter->state = VNIC_PROBING;
5311 dev_set_drvdata(&dev->dev, netdev);
5312 adapter->vdev = dev;
5313 adapter->netdev = netdev;
5314 adapter->login_pending = false;
5316 ether_addr_copy(adapter->mac_addr, mac_addr_p);
5317 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5318 netdev->irq = dev->irq;
5319 netdev->netdev_ops = &ibmvnic_netdev_ops;
5320 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5321 SET_NETDEV_DEV(netdev, &dev->dev);
5323 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5324 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5325 __ibmvnic_delayed_reset);
5326 INIT_LIST_HEAD(&adapter->rwi_list);
5327 spin_lock_init(&adapter->rwi_lock);
5328 spin_lock_init(&adapter->state_lock);
5329 mutex_init(&adapter->fw_lock);
5330 init_completion(&adapter->init_done);
5331 init_completion(&adapter->fw_done);
5332 init_completion(&adapter->reset_done);
5333 init_completion(&adapter->stats_done);
5334 clear_bit(0, &adapter->resetting);
5337 rc = init_crq_queue(adapter);
5339 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5341 goto ibmvnic_init_fail;
5344 rc = ibmvnic_reset_init(adapter, false);
5345 if (rc && rc != EAGAIN)
5346 goto ibmvnic_init_fail;
5347 } while (rc == EAGAIN);
5349 rc = init_stats_buffers(adapter);
5351 goto ibmvnic_init_fail;
5353 rc = init_stats_token(adapter);
5355 goto ibmvnic_stats_fail;
5357 netdev->mtu = adapter->req_mtu - ETH_HLEN;
5358 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5359 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5361 rc = device_create_file(&dev->dev, &dev_attr_failover);
5363 goto ibmvnic_dev_file_err;
5365 netif_carrier_off(netdev);
5366 rc = register_netdev(netdev);
5368 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5369 goto ibmvnic_register_fail;
5371 dev_info(&dev->dev, "ibmvnic registered\n");
5373 adapter->state = VNIC_PROBED;
5375 adapter->wait_for_reset = false;
5376 adapter->last_reset_time = jiffies;
5379 ibmvnic_register_fail:
5380 device_remove_file(&dev->dev, &dev_attr_failover);
5382 ibmvnic_dev_file_err:
5383 release_stats_token(adapter);
5386 release_stats_buffers(adapter);
5389 release_sub_crqs(adapter, 1);
5390 release_crq_queue(adapter);
5391 mutex_destroy(&adapter->fw_lock);
5392 free_netdev(netdev);
5397 static void ibmvnic_remove(struct vio_dev *dev)
5399 struct net_device *netdev = dev_get_drvdata(&dev->dev);
5400 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5401 unsigned long flags;
5403 spin_lock_irqsave(&adapter->state_lock, flags);
5405 /* If ibmvnic_reset() is scheduling a reset, wait for it to
5406 * finish. Then, set the state to REMOVING to prevent it from
5407 * scheduling any more work and to have reset functions ignore
5408 * any resets that have already been scheduled. Drop the lock
5409 * after setting state, so __ibmvnic_reset() which is called
5410 * from the flush_work() below, can make progress.
5412 spin_lock(&adapter->rwi_lock);
5413 adapter->state = VNIC_REMOVING;
5414 spin_unlock(&adapter->rwi_lock);
5416 spin_unlock_irqrestore(&adapter->state_lock, flags);
5418 flush_work(&adapter->ibmvnic_reset);
5419 flush_delayed_work(&adapter->ibmvnic_delayed_reset);
5422 unregister_netdevice(netdev);
5424 release_resources(adapter);
5425 release_sub_crqs(adapter, 1);
5426 release_crq_queue(adapter);
5428 release_stats_token(adapter);
5429 release_stats_buffers(adapter);
5431 adapter->state = VNIC_REMOVED;
5434 mutex_destroy(&adapter->fw_lock);
5435 device_remove_file(&dev->dev, &dev_attr_failover);
5436 free_netdev(netdev);
5437 dev_set_drvdata(&dev->dev, NULL);
5440 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5441 const char *buf, size_t count)
5443 struct net_device *netdev = dev_get_drvdata(dev);
5444 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5445 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5446 __be64 session_token;
5449 if (!sysfs_streq(buf, "1"))
5452 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5453 H_GET_SESSION_TOKEN, 0, 0, 0);
5455 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5460 session_token = (__be64)retbuf[0];
5461 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5462 be64_to_cpu(session_token));
5463 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5464 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5466 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
5474 static DEVICE_ATTR_WO(failover);
5476 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5478 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5479 struct ibmvnic_adapter *adapter;
5480 struct iommu_table *tbl;
5481 unsigned long ret = 0;
5484 tbl = get_iommu_table_base(&vdev->dev);
5486 /* netdev inits at probe time along with the structures we need below*/
5488 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5490 adapter = netdev_priv(netdev);
5492 ret += PAGE_SIZE; /* the crq message queue */
5493 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5495 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5496 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5498 for (i = 0; i < adapter->num_active_rx_pools; i++)
5499 ret += adapter->rx_pool[i].size *
5500 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5505 static int ibmvnic_resume(struct device *dev)
5507 struct net_device *netdev = dev_get_drvdata(dev);
5508 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5510 if (adapter->state != VNIC_OPEN)
5513 tasklet_schedule(&adapter->tasklet);
5518 static const struct vio_device_id ibmvnic_device_table[] = {
5519 {"network", "IBM,vnic"},
5522 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5524 static const struct dev_pm_ops ibmvnic_pm_ops = {
5525 .resume = ibmvnic_resume
5528 static struct vio_driver ibmvnic_driver = {
5529 .id_table = ibmvnic_device_table,
5530 .probe = ibmvnic_probe,
5531 .remove = ibmvnic_remove,
5532 .get_desired_dma = ibmvnic_get_desired_dma,
5533 .name = ibmvnic_driver_name,
5534 .pm = &ibmvnic_pm_ops,
5537 /* module functions */
5538 static int __init ibmvnic_module_init(void)
5540 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5541 IBMVNIC_DRIVER_VERSION);
5543 return vio_register_driver(&ibmvnic_driver);
5546 static void __exit ibmvnic_module_exit(void)
5548 vio_unregister_driver(&ibmvnic_driver);
5551 module_init(ibmvnic_module_init);
5552 module_exit(ibmvnic_module_exit);