brintos / linux-shallow public Read only

1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c4 *5 *  eHEA ethernet device driver for IBM eServer System p6 *7 *  (C) Copyright IBM Corp. 20068 *9 *  Authors:10 *	 Christoph Raisch <raisch@de.ibm.com>11 *	 Jan-Bernd Themann <themann@de.ibm.com>12 *	 Thomas Klein <tklein@de.ibm.com>13 */14 15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt16 17#include <linux/device.h>18#include <linux/in.h>19#include <linux/ip.h>20#include <linux/tcp.h>21#include <linux/udp.h>22#include <linux/if.h>23#include <linux/list.h>24#include <linux/slab.h>25#include <linux/if_ether.h>26#include <linux/notifier.h>27#include <linux/reboot.h>28#include <linux/memory.h>29#include <asm/kexec.h>30#include <linux/mutex.h>31#include <linux/prefetch.h>32#include <linux/of.h>33#include <linux/of_device.h>34#include <linux/platform_device.h>35 36#include <net/ip.h>37 38#include "ehea.h"39#include "ehea_qmr.h"40#include "ehea_phyp.h"41 42 43MODULE_LICENSE("GPL");44MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");45MODULE_DESCRIPTION("IBM eServer HEA Driver");46MODULE_VERSION(DRV_VERSION);47 48 49static int msg_level = -1;50static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;51static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;52static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;53static int sq_entries = EHEA_DEF_ENTRIES_SQ;54static int use_mcs = 1;55static int prop_carrier_state;56 57module_param(msg_level, int, 0);58module_param(rq1_entries, int, 0);59module_param(rq2_entries, int, 0);60module_param(rq3_entries, int, 0);61module_param(sq_entries, int, 0);62module_param(prop_carrier_state, int, 0);63module_param(use_mcs, int, 0);64 65MODULE_PARM_DESC(msg_level, "msg_level");66MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "67		 "port to stack. 1:yes, 0:no.  Default = 0 ");68MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "69		 "[2^x - 1], x = [7..14]. Default = "70		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");71MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "72		 "[2^x - 1], x = [7..14]. Default = "73		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");74MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "75		 "[2^x - 1], x = [7..14]. Default = "76		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");77MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "78		 "[2^x - 1], x = [7..14]. Default = "79		 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");80MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "81		 "Default = 1");82 83static int port_name_cnt;84static LIST_HEAD(adapter_list);85static unsigned long ehea_driver_flags;86static DEFINE_MUTEX(dlpar_mem_lock);87static struct ehea_fw_handle_array ehea_fw_handles;88static struct ehea_bcmc_reg_array ehea_bcmc_regs;89 90 91static int ehea_probe_adapter(struct platform_device *dev);92 93static void ehea_remove(struct platform_device *dev);94 95static const struct of_device_id ehea_module_device_table[] = {96	{97		.name = "lhea",98		.compatible = "IBM,lhea",99	},100	{101		.type = "network",102		.compatible = "IBM,lhea-ethernet",103	},104	{},105};106MODULE_DEVICE_TABLE(of, ehea_module_device_table);107 108static const struct of_device_id ehea_device_table[] = {109	{110		.name = "lhea",111		.compatible = "IBM,lhea",112	},113	{},114};115MODULE_DEVICE_TABLE(of, ehea_device_table);116 117static struct platform_driver ehea_driver = {118	.driver = {119		.name = "ehea",120		.owner = THIS_MODULE,121		.of_match_table = ehea_device_table,122	},123	.probe = ehea_probe_adapter,124	.remove_new = ehea_remove,125};126 127void ehea_dump(void *adr, int len, char *msg)128{129	int x;130	unsigned char *deb = adr;131	for (x = 0; x < len; x += 16) {132		pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",133			msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));134		deb += 16;135	}136}137 138static void ehea_schedule_port_reset(struct ehea_port *port)139{140	if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))141		schedule_work(&port->reset_task);142}143 144static void ehea_update_firmware_handles(void)145{146	struct ehea_fw_handle_entry *arr = NULL;147	struct ehea_adapter *adapter;148	int num_adapters = 0;149	int num_ports = 0;150	int num_portres = 0;151	int i = 0;152	int num_fw_handles, k, l;153 154	/* Determine number of handles */155	mutex_lock(&ehea_fw_handles.lock);156 157	list_for_each_entry(adapter, &adapter_list, list) {158		num_adapters++;159 160		for (k = 0; k < EHEA_MAX_PORTS; k++) {161			struct ehea_port *port = adapter->port[k];162 163			if (!port || (port->state != EHEA_PORT_UP))164				continue;165 166			num_ports++;167			num_portres += port->num_def_qps;168		}169	}170 171	num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +172			 num_ports * EHEA_NUM_PORT_FW_HANDLES +173			 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;174 175	if (num_fw_handles) {176		arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);177		if (!arr)178			goto out;  /* Keep the existing array */179	} else180		goto out_update;181 182	list_for_each_entry(adapter, &adapter_list, list) {183		if (num_adapters == 0)184			break;185 186		for (k = 0; k < EHEA_MAX_PORTS; k++) {187			struct ehea_port *port = adapter->port[k];188 189			if (!port || (port->state != EHEA_PORT_UP) ||190			    (num_ports == 0))191				continue;192 193			for (l = 0; l < port->num_def_qps; l++) {194				struct ehea_port_res *pr = &port->port_res[l];195 196				arr[i].adh = adapter->handle;197				arr[i++].fwh = pr->qp->fw_handle;198				arr[i].adh = adapter->handle;199				arr[i++].fwh = pr->send_cq->fw_handle;200				arr[i].adh = adapter->handle;201				arr[i++].fwh = pr->recv_cq->fw_handle;202				arr[i].adh = adapter->handle;203				arr[i++].fwh = pr->eq->fw_handle;204				arr[i].adh = adapter->handle;205				arr[i++].fwh = pr->send_mr.handle;206				arr[i].adh = adapter->handle;207				arr[i++].fwh = pr->recv_mr.handle;208			}209			arr[i].adh = adapter->handle;210			arr[i++].fwh = port->qp_eq->fw_handle;211			num_ports--;212		}213 214		arr[i].adh = adapter->handle;215		arr[i++].fwh = adapter->neq->fw_handle;216 217		if (adapter->mr.handle) {218			arr[i].adh = adapter->handle;219			arr[i++].fwh = adapter->mr.handle;220		}221		num_adapters--;222	}223 224out_update:225	kfree(ehea_fw_handles.arr);226	ehea_fw_handles.arr = arr;227	ehea_fw_handles.num_entries = i;228out:229	mutex_unlock(&ehea_fw_handles.lock);230}231 232static void ehea_update_bcmc_registrations(void)233{234	unsigned long flags;235	struct ehea_bcmc_reg_entry *arr = NULL;236	struct ehea_adapter *adapter;237	struct ehea_mc_list *mc_entry;238	int num_registrations = 0;239	int i = 0;240	int k;241 242	spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);243 244	/* Determine number of registrations */245	list_for_each_entry(adapter, &adapter_list, list)246		for (k = 0; k < EHEA_MAX_PORTS; k++) {247			struct ehea_port *port = adapter->port[k];248 249			if (!port || (port->state != EHEA_PORT_UP))250				continue;251 252			num_registrations += 2;	/* Broadcast registrations */253 254			list_for_each_entry(mc_entry, &port->mc_list->list,list)255				num_registrations += 2;256		}257 258	if (num_registrations) {259		arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);260		if (!arr)261			goto out;  /* Keep the existing array */262	} else263		goto out_update;264 265	list_for_each_entry(adapter, &adapter_list, list) {266		for (k = 0; k < EHEA_MAX_PORTS; k++) {267			struct ehea_port *port = adapter->port[k];268 269			if (!port || (port->state != EHEA_PORT_UP))270				continue;271 272			if (num_registrations == 0)273				goto out_update;274 275			arr[i].adh = adapter->handle;276			arr[i].port_id = port->logical_port_id;277			arr[i].reg_type = EHEA_BCMC_BROADCAST |278					  EHEA_BCMC_UNTAGGED;279			arr[i++].macaddr = port->mac_addr;280 281			arr[i].adh = adapter->handle;282			arr[i].port_id = port->logical_port_id;283			arr[i].reg_type = EHEA_BCMC_BROADCAST |284					  EHEA_BCMC_VLANID_ALL;285			arr[i++].macaddr = port->mac_addr;286			num_registrations -= 2;287 288			list_for_each_entry(mc_entry,289					    &port->mc_list->list, list) {290				if (num_registrations == 0)291					goto out_update;292 293				arr[i].adh = adapter->handle;294				arr[i].port_id = port->logical_port_id;295				arr[i].reg_type = EHEA_BCMC_MULTICAST |296						  EHEA_BCMC_UNTAGGED;297				if (mc_entry->macaddr == 0)298					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;299				arr[i++].macaddr = mc_entry->macaddr;300 301				arr[i].adh = adapter->handle;302				arr[i].port_id = port->logical_port_id;303				arr[i].reg_type = EHEA_BCMC_MULTICAST |304						  EHEA_BCMC_VLANID_ALL;305				if (mc_entry->macaddr == 0)306					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;307				arr[i++].macaddr = mc_entry->macaddr;308				num_registrations -= 2;309			}310		}311	}312 313out_update:314	kfree(ehea_bcmc_regs.arr);315	ehea_bcmc_regs.arr = arr;316	ehea_bcmc_regs.num_entries = i;317out:318	spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);319}320 321static void ehea_get_stats64(struct net_device *dev,322			     struct rtnl_link_stats64 *stats)323{324	struct ehea_port *port = netdev_priv(dev);325	u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;326	int i;327 328	for (i = 0; i < port->num_def_qps; i++) {329		rx_packets += port->port_res[i].rx_packets;330		rx_bytes   += port->port_res[i].rx_bytes;331	}332 333	for (i = 0; i < port->num_def_qps; i++) {334		tx_packets += port->port_res[i].tx_packets;335		tx_bytes   += port->port_res[i].tx_bytes;336	}337 338	stats->tx_packets = tx_packets;339	stats->rx_bytes = rx_bytes;340	stats->tx_bytes = tx_bytes;341	stats->rx_packets = rx_packets;342 343	stats->multicast = port->stats.multicast;344	stats->rx_errors = port->stats.rx_errors;345}346 347static void ehea_update_stats(struct work_struct *work)348{349	struct ehea_port *port =350		container_of(work, struct ehea_port, stats_work.work);351	struct net_device *dev = port->netdev;352	struct rtnl_link_stats64 *stats = &port->stats;353	struct hcp_ehea_port_cb2 *cb2;354	u64 hret;355 356	cb2 = (void *)get_zeroed_page(GFP_KERNEL);357	if (!cb2) {358		netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");359		goto resched;360	}361 362	hret = ehea_h_query_ehea_port(port->adapter->handle,363				      port->logical_port_id,364				      H_PORT_CB2, H_PORT_CB2_ALL, cb2);365	if (hret != H_SUCCESS) {366		netdev_err(dev, "query_ehea_port failed\n");367		goto out_herr;368	}369 370	if (netif_msg_hw(port))371		ehea_dump(cb2, sizeof(*cb2), "net_device_stats");372 373	stats->multicast = cb2->rxmcp;374	stats->rx_errors = cb2->rxuerr;375 376out_herr:377	free_page((unsigned long)cb2);378resched:379	schedule_delayed_work(&port->stats_work,380			      round_jiffies_relative(msecs_to_jiffies(1000)));381}382 383static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)384{385	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;386	struct net_device *dev = pr->port->netdev;387	int max_index_mask = pr->rq1_skba.len - 1;388	int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;389	int adder = 0;390	int i;391 392	pr->rq1_skba.os_skbs = 0;393 394	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {395		if (nr_of_wqes > 0)396			pr->rq1_skba.index = index;397		pr->rq1_skba.os_skbs = fill_wqes;398		return;399	}400 401	for (i = 0; i < fill_wqes; i++) {402		if (!skb_arr_rq1[index]) {403			skb_arr_rq1[index] = netdev_alloc_skb(dev,404							      EHEA_L_PKT_SIZE);405			if (!skb_arr_rq1[index]) {406				pr->rq1_skba.os_skbs = fill_wqes - i;407				break;408			}409		}410		index--;411		index &= max_index_mask;412		adder++;413	}414 415	if (adder == 0)416		return;417 418	/* Ring doorbell */419	ehea_update_rq1a(pr->qp, adder);420}421 422static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)423{424	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;425	struct net_device *dev = pr->port->netdev;426	int i;427 428	if (nr_rq1a > pr->rq1_skba.len) {429		netdev_err(dev, "NR_RQ1A bigger than skb array len\n");430		return;431	}432 433	for (i = 0; i < nr_rq1a; i++) {434		skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);435		if (!skb_arr_rq1[i])436			break;437	}438	/* Ring doorbell */439	ehea_update_rq1a(pr->qp, i - 1);440}441 442static int ehea_refill_rq_def(struct ehea_port_res *pr,443			      struct ehea_q_skb_arr *q_skba, int rq_nr,444			      int num_wqes, int wqe_type, int packet_size)445{446	struct net_device *dev = pr->port->netdev;447	struct ehea_qp *qp = pr->qp;448	struct sk_buff **skb_arr = q_skba->arr;449	struct ehea_rwqe *rwqe;450	int i, index, max_index_mask, fill_wqes;451	int adder = 0;452	int ret = 0;453 454	fill_wqes = q_skba->os_skbs + num_wqes;455	q_skba->os_skbs = 0;456 457	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {458		q_skba->os_skbs = fill_wqes;459		return ret;460	}461 462	index = q_skba->index;463	max_index_mask = q_skba->len - 1;464	for (i = 0; i < fill_wqes; i++) {465		u64 tmp_addr;466		struct sk_buff *skb;467 468		skb = netdev_alloc_skb_ip_align(dev, packet_size);469		if (!skb) {470			q_skba->os_skbs = fill_wqes - i;471			if (q_skba->os_skbs == q_skba->len - 2) {472				netdev_info(pr->port->netdev,473					    "rq%i ran dry - no mem for skb\n",474					    rq_nr);475				ret = -ENOMEM;476			}477			break;478		}479 480		skb_arr[index] = skb;481		tmp_addr = ehea_map_vaddr(skb->data);482		if (tmp_addr == -1) {483			dev_consume_skb_any(skb);484			q_skba->os_skbs = fill_wqes - i;485			ret = 0;486			break;487		}488 489		rwqe = ehea_get_next_rwqe(qp, rq_nr);490		rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)491			    | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);492		rwqe->sg_list[0].l_key = pr->recv_mr.lkey;493		rwqe->sg_list[0].vaddr = tmp_addr;494		rwqe->sg_list[0].len = packet_size;495		rwqe->data_segments = 1;496 497		index++;498		index &= max_index_mask;499		adder++;500	}501 502	q_skba->index = index;503	if (adder == 0)504		goto out;505 506	/* Ring doorbell */507	iosync();508	if (rq_nr == 2)509		ehea_update_rq2a(pr->qp, adder);510	else511		ehea_update_rq3a(pr->qp, adder);512out:513	return ret;514}515 516 517static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)518{519	return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,520				  nr_of_wqes, EHEA_RWQE2_TYPE,521				  EHEA_RQ2_PKT_SIZE);522}523 524 525static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)526{527	return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,528				  nr_of_wqes, EHEA_RWQE3_TYPE,529				  EHEA_MAX_PACKET_SIZE);530}531 532static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)533{534	*rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;535	if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)536		return 0;537	if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&538	    (cqe->header_length == 0))539		return 0;540	return -EINVAL;541}542 543static inline void ehea_fill_skb(struct net_device *dev,544				 struct sk_buff *skb, struct ehea_cqe *cqe,545				 struct ehea_port_res *pr)546{547	int length = cqe->num_bytes_transfered - 4;	/*remove CRC */548 549	skb_put(skb, length);550	skb->protocol = eth_type_trans(skb, dev);551 552	/* The packet was not an IPV4 packet so a complemented checksum was553	   calculated. The value is found in the Internet Checksum field. */554	if (cqe->status & EHEA_CQE_BLIND_CKSUM) {555		skb->ip_summed = CHECKSUM_COMPLETE;556		skb->csum = csum_unfold(~cqe->inet_checksum_value);557	} else558		skb->ip_summed = CHECKSUM_UNNECESSARY;559 560	skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);561}562 563static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,564					       int arr_len,565					       struct ehea_cqe *cqe)566{567	int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);568	struct sk_buff *skb;569	void *pref;570	int x;571 572	x = skb_index + 1;573	x &= (arr_len - 1);574 575	pref = skb_array[x];576	if (pref) {577		prefetchw(pref);578		prefetchw(pref + EHEA_CACHE_LINE);579 580		pref = (skb_array[x]->data);581		prefetch(pref);582		prefetch(pref + EHEA_CACHE_LINE);583		prefetch(pref + EHEA_CACHE_LINE * 2);584		prefetch(pref + EHEA_CACHE_LINE * 3);585	}586 587	skb = skb_array[skb_index];588	skb_array[skb_index] = NULL;589	return skb;590}591 592static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,593						  int arr_len, int wqe_index)594{595	struct sk_buff *skb;596	void *pref;597	int x;598 599	x = wqe_index + 1;600	x &= (arr_len - 1);601 602	pref = skb_array[x];603	if (pref) {604		prefetchw(pref);605		prefetchw(pref + EHEA_CACHE_LINE);606 607		pref = (skb_array[x]->data);608		prefetchw(pref);609		prefetchw(pref + EHEA_CACHE_LINE);610	}611 612	skb = skb_array[wqe_index];613	skb_array[wqe_index] = NULL;614	return skb;615}616 617static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,618				 struct ehea_cqe *cqe, int *processed_rq2,619				 int *processed_rq3)620{621	struct sk_buff *skb;622 623	if (cqe->status & EHEA_CQE_STAT_ERR_TCP)624		pr->p_stats.err_tcp_cksum++;625	if (cqe->status & EHEA_CQE_STAT_ERR_IP)626		pr->p_stats.err_ip_cksum++;627	if (cqe->status & EHEA_CQE_STAT_ERR_CRC)628		pr->p_stats.err_frame_crc++;629 630	if (rq == 2) {631		*processed_rq2 += 1;632		skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);633		dev_kfree_skb(skb);634	} else if (rq == 3) {635		*processed_rq3 += 1;636		skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);637		dev_kfree_skb(skb);638	}639 640	if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {641		if (netif_msg_rx_err(pr->port)) {642			pr_err("Critical receive error for QP %d. Resetting port.\n",643			       pr->qp->init_attr.qp_nr);644			ehea_dump(cqe, sizeof(*cqe), "CQE");645		}646		ehea_schedule_port_reset(pr->port);647		return 1;648	}649 650	return 0;651}652 653static int ehea_proc_rwqes(struct net_device *dev,654			   struct ehea_port_res *pr,655			   int budget)656{657	struct ehea_port *port = pr->port;658	struct ehea_qp *qp = pr->qp;659	struct ehea_cqe *cqe;660	struct sk_buff *skb;661	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;662	struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;663	struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;664	int skb_arr_rq1_len = pr->rq1_skba.len;665	int skb_arr_rq2_len = pr->rq2_skba.len;666	int skb_arr_rq3_len = pr->rq3_skba.len;667	int processed, processed_rq1, processed_rq2, processed_rq3;668	u64 processed_bytes = 0;669	int wqe_index, last_wqe_index, rq, port_reset;670 671	processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;672	last_wqe_index = 0;673 674	cqe = ehea_poll_rq1(qp, &wqe_index);675	while ((processed < budget) && cqe) {676		ehea_inc_rq1(qp);677		processed_rq1++;678		processed++;679		if (netif_msg_rx_status(port))680			ehea_dump(cqe, sizeof(*cqe), "CQE");681 682		last_wqe_index = wqe_index;683		rmb();684		if (!ehea_check_cqe(cqe, &rq)) {685			if (rq == 1) {686				/* LL RQ1 */687				skb = get_skb_by_index_ll(skb_arr_rq1,688							  skb_arr_rq1_len,689							  wqe_index);690				if (unlikely(!skb)) {691					netif_info(port, rx_err, dev,692						  "LL rq1: skb=NULL\n");693 694					skb = netdev_alloc_skb(dev,695							       EHEA_L_PKT_SIZE);696					if (!skb)697						break;698				}699				skb_copy_to_linear_data(skb, ((char *)cqe) + 64,700						 cqe->num_bytes_transfered - 4);701				ehea_fill_skb(dev, skb, cqe, pr);702			} else if (rq == 2) {703				/* RQ2 */704				skb = get_skb_by_index(skb_arr_rq2,705						       skb_arr_rq2_len, cqe);706				if (unlikely(!skb)) {707					netif_err(port, rx_err, dev,708						  "rq2: skb=NULL\n");709					break;710				}711				ehea_fill_skb(dev, skb, cqe, pr);712				processed_rq2++;713			} else {714				/* RQ3 */715				skb = get_skb_by_index(skb_arr_rq3,716						       skb_arr_rq3_len, cqe);717				if (unlikely(!skb)) {718					netif_err(port, rx_err, dev,719						  "rq3: skb=NULL\n");720					break;721				}722				ehea_fill_skb(dev, skb, cqe, pr);723				processed_rq3++;724			}725 726			processed_bytes += skb->len;727 728			if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)729				__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),730						       cqe->vlan_tag);731 732			napi_gro_receive(&pr->napi, skb);733		} else {734			pr->p_stats.poll_receive_errors++;735			port_reset = ehea_treat_poll_error(pr, rq, cqe,736							   &processed_rq2,737							   &processed_rq3);738			if (port_reset)739				break;740		}741		cqe = ehea_poll_rq1(qp, &wqe_index);742	}743 744	pr->rx_packets += processed;745	pr->rx_bytes += processed_bytes;746 747	ehea_refill_rq1(pr, last_wqe_index, processed_rq1);748	ehea_refill_rq2(pr, processed_rq2);749	ehea_refill_rq3(pr, processed_rq3);750 751	return processed;752}753 754#define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull755 756static void reset_sq_restart_flag(struct ehea_port *port)757{758	int i;759 760	for (i = 0; i < port->num_def_qps; i++) {761		struct ehea_port_res *pr = &port->port_res[i];762		pr->sq_restart_flag = 0;763	}764	wake_up(&port->restart_wq);765}766 767static void check_sqs(struct ehea_port *port)768{769	struct ehea_swqe *swqe;770	int swqe_index;771	int i;772 773	for (i = 0; i < port->num_def_qps; i++) {774		struct ehea_port_res *pr = &port->port_res[i];775		int ret;776		swqe = ehea_get_swqe(pr->qp, &swqe_index);777		memset(swqe, 0, SWQE_HEADER_SIZE);778		atomic_dec(&pr->swqe_avail);779 780		swqe->tx_control |= EHEA_SWQE_PURGE;781		swqe->wr_id = SWQE_RESTART_CHECK;782		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;783		swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;784		swqe->immediate_data_length = 80;785 786		ehea_post_swqe(pr->qp, swqe);787 788		ret = wait_event_timeout(port->restart_wq,789					 pr->sq_restart_flag == 0,790					 msecs_to_jiffies(100));791 792		if (!ret) {793			pr_err("HW/SW queues out of sync\n");794			ehea_schedule_port_reset(pr->port);795			return;796		}797	}798}799 800 801static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)802{803	struct sk_buff *skb;804	struct ehea_cq *send_cq = pr->send_cq;805	struct ehea_cqe *cqe;806	int quota = my_quota;807	int cqe_counter = 0;808	int swqe_av = 0;809	int index;810	struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,811						pr - &pr->port->port_res[0]);812 813	cqe = ehea_poll_cq(send_cq);814	while (cqe && (quota > 0)) {815		ehea_inc_cq(send_cq);816 817		cqe_counter++;818		rmb();819 820		if (cqe->wr_id == SWQE_RESTART_CHECK) {821			pr->sq_restart_flag = 1;822			swqe_av++;823			break;824		}825 826		if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {827			pr_err("Bad send completion status=0x%04X\n",828			       cqe->status);829 830			if (netif_msg_tx_err(pr->port))831				ehea_dump(cqe, sizeof(*cqe), "Send CQE");832 833			if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {834				pr_err("Resetting port\n");835				ehea_schedule_port_reset(pr->port);836				break;837			}838		}839 840		if (netif_msg_tx_done(pr->port))841			ehea_dump(cqe, sizeof(*cqe), "CQE");842 843		if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)844			   == EHEA_SWQE2_TYPE)) {845 846			index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);847			skb = pr->sq_skba.arr[index];848			dev_consume_skb_any(skb);849			pr->sq_skba.arr[index] = NULL;850		}851 852		swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);853		quota--;854 855		cqe = ehea_poll_cq(send_cq);856	}857 858	ehea_update_feca(send_cq, cqe_counter);859	atomic_add(swqe_av, &pr->swqe_avail);860 861	if (unlikely(netif_tx_queue_stopped(txq) &&862		     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {863		__netif_tx_lock(txq, smp_processor_id());864		if (netif_tx_queue_stopped(txq) &&865		    (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))866			netif_tx_wake_queue(txq);867		__netif_tx_unlock(txq);868	}869 870	wake_up(&pr->port->swqe_avail_wq);871 872	return cqe;873}874 875#define EHEA_POLL_MAX_CQES 65535876 877static int ehea_poll(struct napi_struct *napi, int budget)878{879	struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,880						napi);881	struct net_device *dev = pr->port->netdev;882	struct ehea_cqe *cqe;883	struct ehea_cqe *cqe_skb = NULL;884	int wqe_index;885	int rx = 0;886 887	cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);888	rx += ehea_proc_rwqes(dev, pr, budget - rx);889 890	while (rx != budget) {891		napi_complete(napi);892		ehea_reset_cq_ep(pr->recv_cq);893		ehea_reset_cq_ep(pr->send_cq);894		ehea_reset_cq_n1(pr->recv_cq);895		ehea_reset_cq_n1(pr->send_cq);896		rmb();897		cqe = ehea_poll_rq1(pr->qp, &wqe_index);898		cqe_skb = ehea_poll_cq(pr->send_cq);899 900		if (!cqe && !cqe_skb)901			return rx;902 903		if (!napi_schedule(napi))904			return rx;905 906		cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);907		rx += ehea_proc_rwqes(dev, pr, budget - rx);908	}909 910	return rx;911}912 913static irqreturn_t ehea_recv_irq_handler(int irq, void *param)914{915	struct ehea_port_res *pr = param;916 917	napi_schedule(&pr->napi);918 919	return IRQ_HANDLED;920}921 922static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)923{924	struct ehea_port *port = param;925	struct ehea_eqe *eqe;926	struct ehea_qp *qp;927	u32 qp_token;928	u64 resource_type, aer, aerr;929	int reset_port = 0;930 931	eqe = ehea_poll_eq(port->qp_eq);932 933	while (eqe) {934		qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);935		pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",936		       eqe->entry, qp_token);937 938		qp = port->port_res[qp_token].qp;939 940		resource_type = ehea_error_data(port->adapter, qp->fw_handle,941						&aer, &aerr);942 943		if (resource_type == EHEA_AER_RESTYPE_QP) {944			if ((aer & EHEA_AER_RESET_MASK) ||945			    (aerr & EHEA_AERR_RESET_MASK))946				 reset_port = 1;947		} else948			reset_port = 1;   /* Reset in case of CQ or EQ error */949 950		eqe = ehea_poll_eq(port->qp_eq);951	}952 953	if (reset_port) {954		pr_err("Resetting port\n");955		ehea_schedule_port_reset(port);956	}957 958	return IRQ_HANDLED;959}960 961static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,962				       int logical_port)963{964	int i;965 966	for (i = 0; i < EHEA_MAX_PORTS; i++)967		if (adapter->port[i])968			if (adapter->port[i]->logical_port_id == logical_port)969				return adapter->port[i];970	return NULL;971}972 973int ehea_sense_port_attr(struct ehea_port *port)974{975	int ret;976	u64 hret;977	struct hcp_ehea_port_cb0 *cb0;978 979	/* may be called via ehea_neq_tasklet() */980	cb0 = (void *)get_zeroed_page(GFP_ATOMIC);981	if (!cb0) {982		pr_err("no mem for cb0\n");983		ret = -ENOMEM;984		goto out;985	}986 987	hret = ehea_h_query_ehea_port(port->adapter->handle,988				      port->logical_port_id, H_PORT_CB0,989				      EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),990				      cb0);991	if (hret != H_SUCCESS) {992		ret = -EIO;993		goto out_free;994	}995 996	/* MAC address */997	port->mac_addr = cb0->port_mac_addr << 16;998 999	if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {1000		ret = -EADDRNOTAVAIL;1001		goto out_free;1002	}1003 1004	/* Port speed */1005	switch (cb0->port_speed) {1006	case H_SPEED_10M_H:1007		port->port_speed = EHEA_SPEED_10M;1008		port->full_duplex = 0;1009		break;1010	case H_SPEED_10M_F:1011		port->port_speed = EHEA_SPEED_10M;1012		port->full_duplex = 1;1013		break;1014	case H_SPEED_100M_H:1015		port->port_speed = EHEA_SPEED_100M;1016		port->full_duplex = 0;1017		break;1018	case H_SPEED_100M_F:1019		port->port_speed = EHEA_SPEED_100M;1020		port->full_duplex = 1;1021		break;1022	case H_SPEED_1G_F:1023		port->port_speed = EHEA_SPEED_1G;1024		port->full_duplex = 1;1025		break;1026	case H_SPEED_10G_F:1027		port->port_speed = EHEA_SPEED_10G;1028		port->full_duplex = 1;1029		break;1030	default:1031		port->port_speed = 0;1032		port->full_duplex = 0;1033		break;1034	}1035 1036	port->autoneg = 1;1037	port->num_mcs = cb0->num_default_qps;1038 1039	/* Number of default QPs */1040	if (use_mcs)1041		port->num_def_qps = cb0->num_default_qps;1042	else1043		port->num_def_qps = 1;1044 1045	if (!port->num_def_qps) {1046		ret = -EINVAL;1047		goto out_free;1048	}1049 1050	ret = 0;1051out_free:1052	if (ret || netif_msg_probe(port))1053		ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");1054	free_page((unsigned long)cb0);1055out:1056	return ret;1057}1058 1059int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)1060{1061	struct hcp_ehea_port_cb4 *cb4;1062	u64 hret;1063	int ret = 0;1064 1065	cb4 = (void *)get_zeroed_page(GFP_KERNEL);1066	if (!cb4) {1067		pr_err("no mem for cb4\n");1068		ret = -ENOMEM;1069		goto out;1070	}1071 1072	cb4->port_speed = port_speed;1073 1074	netif_carrier_off(port->netdev);1075 1076	hret = ehea_h_modify_ehea_port(port->adapter->handle,1077				       port->logical_port_id,1078				       H_PORT_CB4, H_PORT_CB4_SPEED, cb4);1079	if (hret == H_SUCCESS) {1080		port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;1081 1082		hret = ehea_h_query_ehea_port(port->adapter->handle,1083					      port->logical_port_id,1084					      H_PORT_CB4, H_PORT_CB4_SPEED,1085					      cb4);1086		if (hret == H_SUCCESS) {1087			switch (cb4->port_speed) {1088			case H_SPEED_10M_H:1089				port->port_speed = EHEA_SPEED_10M;1090				port->full_duplex = 0;1091				break;1092			case H_SPEED_10M_F:1093				port->port_speed = EHEA_SPEED_10M;1094				port->full_duplex = 1;1095				break;1096			case H_SPEED_100M_H:1097				port->port_speed = EHEA_SPEED_100M;1098				port->full_duplex = 0;1099				break;1100			case H_SPEED_100M_F:1101				port->port_speed = EHEA_SPEED_100M;1102				port->full_duplex = 1;1103				break;1104			case H_SPEED_1G_F:1105				port->port_speed = EHEA_SPEED_1G;1106				port->full_duplex = 1;1107				break;1108			case H_SPEED_10G_F:1109				port->port_speed = EHEA_SPEED_10G;1110				port->full_duplex = 1;1111				break;1112			default:1113				port->port_speed = 0;1114				port->full_duplex = 0;1115				break;1116			}1117		} else {1118			pr_err("Failed sensing port speed\n");1119			ret = -EIO;1120		}1121	} else {1122		if (hret == H_AUTHORITY) {1123			pr_info("Hypervisor denied setting port speed\n");1124			ret = -EPERM;1125		} else {1126			ret = -EIO;1127			pr_err("Failed setting port speed\n");1128		}1129	}1130	if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))1131		netif_carrier_on(port->netdev);1132 1133	free_page((unsigned long)cb4);1134out:1135	return ret;1136}1137 1138static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)1139{1140	int ret;1141	u8 ec;1142	u8 portnum;1143	struct ehea_port *port;1144	struct net_device *dev;1145 1146	ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);1147	portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);1148	port = ehea_get_port(adapter, portnum);1149	if (!port) {1150		netdev_err(NULL, "unknown portnum %x\n", portnum);1151		return;1152	}1153	dev = port->netdev;1154 1155	switch (ec) {1156	case EHEA_EC_PORTSTATE_CHG:	/* port state change */1157 1158		if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {1159			if (!netif_carrier_ok(dev)) {1160				ret = ehea_sense_port_attr(port);1161				if (ret) {1162					netdev_err(dev, "failed resensing port attributes\n");1163					break;1164				}1165 1166				netif_info(port, link, dev,1167					   "Logical port up: %dMbps %s Duplex\n",1168					   port->port_speed,1169					   port->full_duplex == 1 ?1170					   "Full" : "Half");1171 1172				netif_carrier_on(dev);1173				netif_wake_queue(dev);1174			}1175		} else1176			if (netif_carrier_ok(dev)) {1177				netif_info(port, link, dev,1178					   "Logical port down\n");1179				netif_carrier_off(dev);1180				netif_tx_disable(dev);1181			}1182 1183		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {1184			port->phy_link = EHEA_PHY_LINK_UP;1185			netif_info(port, link, dev,1186				   "Physical port up\n");1187			if (prop_carrier_state)1188				netif_carrier_on(dev);1189		} else {1190			port->phy_link = EHEA_PHY_LINK_DOWN;1191			netif_info(port, link, dev,1192				   "Physical port down\n");1193			if (prop_carrier_state)1194				netif_carrier_off(dev);1195		}1196 1197		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))1198			netdev_info(dev,1199				    "External switch port is primary port\n");1200		else1201			netdev_info(dev,1202				    "External switch port is backup port\n");1203 1204		break;1205	case EHEA_EC_ADAPTER_MALFUNC:1206		netdev_err(dev, "Adapter malfunction\n");1207		break;1208	case EHEA_EC_PORT_MALFUNC:1209		netdev_info(dev, "Port malfunction\n");1210		netif_carrier_off(dev);1211		netif_tx_disable(dev);1212		break;1213	default:1214		netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);1215		break;1216	}1217}1218 1219static void ehea_neq_tasklet(struct tasklet_struct *t)1220{1221	struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet);1222	struct ehea_eqe *eqe;1223	u64 event_mask;1224 1225	eqe = ehea_poll_eq(adapter->neq);1226	pr_debug("eqe=%p\n", eqe);1227 1228	while (eqe) {1229		pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);1230		ehea_parse_eqe(adapter, eqe->entry);1231		eqe = ehea_poll_eq(adapter->neq);1232		pr_debug("next eqe=%p\n", eqe);1233	}1234 1235	event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)1236		   | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)1237		   | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);1238 1239	ehea_h_reset_events(adapter->handle,1240			    adapter->neq->fw_handle, event_mask);1241}1242 1243static irqreturn_t ehea_interrupt_neq(int irq, void *param)1244{1245	struct ehea_adapter *adapter = param;1246	tasklet_hi_schedule(&adapter->neq_tasklet);1247	return IRQ_HANDLED;1248}1249 1250 1251static int ehea_fill_port_res(struct ehea_port_res *pr)1252{1253	int ret;1254	struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;1255 1256	ehea_init_fill_rq1(pr, pr->rq1_skba.len);1257 1258	ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);1259 1260	ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);1261 1262	return ret;1263}1264 1265static int ehea_reg_interrupts(struct net_device *dev)1266{1267	struct ehea_port *port = netdev_priv(dev);1268	struct ehea_port_res *pr;1269	int i, ret;1270 1271 1272	snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",1273		 dev->name);1274 1275	ret = ibmebus_request_irq(port->qp_eq->attr.ist1,1276				  ehea_qp_aff_irq_handler,1277				  0, port->int_aff_name, port);1278	if (ret) {1279		netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",1280			   port->qp_eq->attr.ist1);1281		goto out_free_qpeq;1282	}1283 1284	netif_info(port, ifup, dev,1285		   "irq_handle 0x%X for function qp_aff_irq_handler registered\n",1286		   port->qp_eq->attr.ist1);1287 1288 1289	for (i = 0; i < port->num_def_qps; i++) {1290		pr = &port->port_res[i];1291		snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,1292			 "%s-queue%d", dev->name, i);1293		ret = ibmebus_request_irq(pr->eq->attr.ist1,1294					  ehea_recv_irq_handler,1295					  0, pr->int_send_name, pr);1296		if (ret) {1297			netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",1298				   i, pr->eq->attr.ist1);1299			goto out_free_req;1300		}1301		netif_info(port, ifup, dev,1302			   "irq_handle 0x%X for function ehea_queue_int %d registered\n",1303			   pr->eq->attr.ist1, i);1304	}1305out:1306	return ret;1307 1308 1309out_free_req:1310	while (--i >= 0) {1311		u32 ist = port->port_res[i].eq->attr.ist1;1312		ibmebus_free_irq(ist, &port->port_res[i]);1313	}1314 1315out_free_qpeq:1316	ibmebus_free_irq(port->qp_eq->attr.ist1, port);1317	i = port->num_def_qps;1318 1319	goto out;1320 1321}1322 1323static void ehea_free_interrupts(struct net_device *dev)1324{1325	struct ehea_port *port = netdev_priv(dev);1326	struct ehea_port_res *pr;1327	int i;1328 1329	/* send */1330 1331	for (i = 0; i < port->num_def_qps; i++) {1332		pr = &port->port_res[i];1333		ibmebus_free_irq(pr->eq->attr.ist1, pr);1334		netif_info(port, intr, dev,1335			   "free send irq for res %d with handle 0x%X\n",1336			   i, pr->eq->attr.ist1);1337	}1338 1339	/* associated events */1340	ibmebus_free_irq(port->qp_eq->attr.ist1, port);1341	netif_info(port, intr, dev,1342		   "associated event interrupt for handle 0x%X freed\n",1343		   port->qp_eq->attr.ist1);1344}1345 1346static int ehea_configure_port(struct ehea_port *port)1347{1348	int ret, i;1349	u64 hret, mask;1350	struct hcp_ehea_port_cb0 *cb0;1351 1352	ret = -ENOMEM;1353	cb0 = (void *)get_zeroed_page(GFP_KERNEL);1354	if (!cb0)1355		goto out;1356 1357	cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)1358		     | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)1359		     | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)1360		     | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)1361		     | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,1362				      PXLY_RC_VLAN_FILTER)1363		     | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);1364 1365	for (i = 0; i < port->num_mcs; i++)1366		if (use_mcs)1367			cb0->default_qpn_arr[i] =1368				port->port_res[i].qp->init_attr.qp_nr;1369		else1370			cb0->default_qpn_arr[i] =1371				port->port_res[0].qp->init_attr.qp_nr;1372 1373	if (netif_msg_ifup(port))1374		ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");1375 1376	mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)1377	     | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);1378 1379	hret = ehea_h_modify_ehea_port(port->adapter->handle,1380				       port->logical_port_id,1381				       H_PORT_CB0, mask, cb0);1382	ret = -EIO;1383	if (hret != H_SUCCESS)1384		goto out_free;1385 1386	ret = 0;1387 1388out_free:1389	free_page((unsigned long)cb0);1390out:1391	return ret;1392}1393 1394static int ehea_gen_smrs(struct ehea_port_res *pr)1395{1396	int ret;1397	struct ehea_adapter *adapter = pr->port->adapter;1398 1399	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);1400	if (ret)1401		goto out;1402 1403	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);1404	if (ret)1405		goto out_free;1406 1407	return 0;1408 1409out_free:1410	ehea_rem_mr(&pr->send_mr);1411out:1412	pr_err("Generating SMRS failed\n");1413	return -EIO;1414}1415 1416static int ehea_rem_smrs(struct ehea_port_res *pr)1417{1418	if ((ehea_rem_mr(&pr->send_mr)) ||1419	    (ehea_rem_mr(&pr->recv_mr)))1420		return -EIO;1421	else1422		return 0;1423}1424 1425static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)1426{1427	int arr_size = sizeof(void *) * max_q_entries;1428 1429	q_skba->arr = vzalloc(arr_size);1430	if (!q_skba->arr)1431		return -ENOMEM;1432 1433	q_skba->len = max_q_entries;1434	q_skba->index = 0;1435	q_skba->os_skbs = 0;1436 1437	return 0;1438}1439 1440static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,1441			      struct port_res_cfg *pr_cfg, int queue_token)1442{1443	struct ehea_adapter *adapter = port->adapter;1444	enum ehea_eq_type eq_type = EHEA_EQ;1445	struct ehea_qp_init_attr *init_attr = NULL;1446	int ret = -EIO;1447	u64 tx_bytes, rx_bytes, tx_packets, rx_packets;1448 1449	tx_bytes = pr->tx_bytes;1450	tx_packets = pr->tx_packets;1451	rx_bytes = pr->rx_bytes;1452	rx_packets = pr->rx_packets;1453 1454	memset(pr, 0, sizeof(struct ehea_port_res));1455 1456	pr->tx_bytes = tx_bytes;1457	pr->tx_packets = tx_packets;1458	pr->rx_bytes = rx_bytes;1459	pr->rx_packets = rx_packets;1460 1461	pr->port = port;1462 1463	pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);1464	if (!pr->eq) {1465		pr_err("create_eq failed (eq)\n");1466		goto out_free;1467	}1468 1469	pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,1470				     pr->eq->fw_handle,1471				     port->logical_port_id);1472	if (!pr->recv_cq) {1473		pr_err("create_cq failed (cq_recv)\n");1474		goto out_free;1475	}1476 1477	pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,1478				     pr->eq->fw_handle,1479				     port->logical_port_id);1480	if (!pr->send_cq) {1481		pr_err("create_cq failed (cq_send)\n");1482		goto out_free;1483	}1484 1485	if (netif_msg_ifup(port))1486		pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",1487			pr->send_cq->attr.act_nr_of_cqes,1488			pr->recv_cq->attr.act_nr_of_cqes);1489 1490	init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);1491	if (!init_attr) {1492		ret = -ENOMEM;1493		pr_err("no mem for ehea_qp_init_attr\n");1494		goto out_free;1495	}1496 1497	init_attr->low_lat_rq1 = 1;1498	init_attr->signalingtype = 1;	/* generate CQE if specified in WQE */1499	init_attr->rq_count = 3;1500	init_attr->qp_token = queue_token;1501	init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;1502	init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;1503	init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;1504	init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;1505	init_attr->wqe_size_enc_sq = EHEA_SG_SQ;1506	init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;1507	init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;1508	init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;1509	init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;1510	init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;1511	init_attr->port_nr = port->logical_port_id;1512	init_attr->send_cq_handle = pr->send_cq->fw_handle;1513	init_attr->recv_cq_handle = pr->recv_cq->fw_handle;1514	init_attr->aff_eq_handle = port->qp_eq->fw_handle;1515 1516	pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);1517	if (!pr->qp) {1518		pr_err("create_qp failed\n");1519		ret = -EIO;1520		goto out_free;1521	}1522 1523	if (netif_msg_ifup(port))1524		pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",1525			init_attr->qp_nr,1526			init_attr->act_nr_send_wqes,1527			init_attr->act_nr_rwqes_rq1,1528			init_attr->act_nr_rwqes_rq2,1529			init_attr->act_nr_rwqes_rq3);1530 1531	pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;1532 1533	ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);1534	ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);1535	ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);1536	ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);1537	if (ret)1538		goto out_free;1539 1540	pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;1541	if (ehea_gen_smrs(pr) != 0) {1542		ret = -EIO;1543		goto out_free;1544	}1545 1546	atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);1547 1548	kfree(init_attr);1549 1550	netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll);1551 1552	ret = 0;1553	goto out;1554 1555out_free:1556	kfree(init_attr);1557	vfree(pr->sq_skba.arr);1558	vfree(pr->rq1_skba.arr);1559	vfree(pr->rq2_skba.arr);1560	vfree(pr->rq3_skba.arr);1561	ehea_destroy_qp(pr->qp);1562	ehea_destroy_cq(pr->send_cq);1563	ehea_destroy_cq(pr->recv_cq);1564	ehea_destroy_eq(pr->eq);1565out:1566	return ret;1567}1568 1569static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)1570{1571	int ret, i;1572 1573	if (pr->qp)1574		netif_napi_del(&pr->napi);1575 1576	ret = ehea_destroy_qp(pr->qp);1577 1578	if (!ret) {1579		ehea_destroy_cq(pr->send_cq);1580		ehea_destroy_cq(pr->recv_cq);1581		ehea_destroy_eq(pr->eq);1582 1583		for (i = 0; i < pr->rq1_skba.len; i++)1584			dev_kfree_skb(pr->rq1_skba.arr[i]);1585 1586		for (i = 0; i < pr->rq2_skba.len; i++)1587			dev_kfree_skb(pr->rq2_skba.arr[i]);1588 1589		for (i = 0; i < pr->rq3_skba.len; i++)1590			dev_kfree_skb(pr->rq3_skba.arr[i]);1591 1592		for (i = 0; i < pr->sq_skba.len; i++)1593			dev_kfree_skb(pr->sq_skba.arr[i]);1594 1595		vfree(pr->rq1_skba.arr);1596		vfree(pr->rq2_skba.arr);1597		vfree(pr->rq3_skba.arr);1598		vfree(pr->sq_skba.arr);1599		ret = ehea_rem_smrs(pr);1600	}1601	return ret;1602}1603 1604static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,1605				  u32 lkey)1606{1607	int skb_data_size = skb_headlen(skb);1608	u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];1609	struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;1610	unsigned int immediate_len = SWQE2_MAX_IMM;1611 1612	swqe->descriptors = 0;1613 1614	if (skb_is_gso(skb)) {1615		swqe->tx_control |= EHEA_SWQE_TSO;1616		swqe->mss = skb_shinfo(skb)->gso_size;1617		/*1618		 * For TSO packets we only copy the headers into the1619		 * immediate area.1620		 */1621		immediate_len = skb_tcp_all_headers(skb);1622	}1623 1624	if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {1625		skb_copy_from_linear_data(skb, imm_data, immediate_len);1626		swqe->immediate_data_length = immediate_len;1627 1628		if (skb_data_size > immediate_len) {1629			sg1entry->l_key = lkey;1630			sg1entry->len = skb_data_size - immediate_len;1631			sg1entry->vaddr =1632				ehea_map_vaddr(skb->data + immediate_len);1633			swqe->descriptors++;1634		}1635	} else {1636		skb_copy_from_linear_data(skb, imm_data, skb_data_size);1637		swqe->immediate_data_length = skb_data_size;1638	}1639}1640 1641static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,1642				    struct ehea_swqe *swqe, u32 lkey)1643{1644	struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;1645	skb_frag_t *frag;1646	int nfrags, sg1entry_contains_frag_data, i;1647 1648	nfrags = skb_shinfo(skb)->nr_frags;1649	sg1entry = &swqe->u.immdata_desc.sg_entry;1650	sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;1651	sg1entry_contains_frag_data = 0;1652 1653	write_swqe2_immediate(skb, swqe, lkey);1654 1655	/* write descriptors */1656	if (nfrags > 0) {1657		if (swqe->descriptors == 0) {1658			/* sg1entry not yet used */1659			frag = &skb_shinfo(skb)->frags[0];1660 1661			/* copy sg1entry data */1662			sg1entry->l_key = lkey;1663			sg1entry->len = skb_frag_size(frag);1664			sg1entry->vaddr =1665				ehea_map_vaddr(skb_frag_address(frag));1666			swqe->descriptors++;1667			sg1entry_contains_frag_data = 1;1668		}1669 1670		for (i = sg1entry_contains_frag_data; i < nfrags; i++) {1671 1672			frag = &skb_shinfo(skb)->frags[i];1673			sgentry = &sg_list[i - sg1entry_contains_frag_data];1674 1675			sgentry->l_key = lkey;1676			sgentry->len = skb_frag_size(frag);1677			sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));1678			swqe->descriptors++;1679		}1680	}1681}1682 1683static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)1684{1685	int ret = 0;1686	u64 hret;1687	u8 reg_type;1688 1689	/* De/Register untagged packets */1690	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;1691	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,1692				     port->logical_port_id,1693				     reg_type, port->mac_addr, 0, hcallid);1694	if (hret != H_SUCCESS) {1695		pr_err("%sregistering bc address failed (tagged)\n",1696		       hcallid == H_REG_BCMC ? "" : "de");1697		ret = -EIO;1698		goto out_herr;1699	}1700 1701	/* De/Register VLAN packets */1702	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;1703	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,1704				     port->logical_port_id,1705				     reg_type, port->mac_addr, 0, hcallid);1706	if (hret != H_SUCCESS) {1707		pr_err("%sregistering bc address failed (vlan)\n",1708		       hcallid == H_REG_BCMC ? "" : "de");1709		ret = -EIO;1710	}1711out_herr:1712	return ret;1713}1714 1715static int ehea_set_mac_addr(struct net_device *dev, void *sa)1716{1717	struct ehea_port *port = netdev_priv(dev);1718	struct sockaddr *mac_addr = sa;1719	struct hcp_ehea_port_cb0 *cb0;1720	int ret;1721	u64 hret;1722 1723	if (!is_valid_ether_addr(mac_addr->sa_data)) {1724		ret = -EADDRNOTAVAIL;1725		goto out;1726	}1727 1728	cb0 = (void *)get_zeroed_page(GFP_KERNEL);1729	if (!cb0) {1730		pr_err("no mem for cb0\n");1731		ret = -ENOMEM;1732		goto out;1733	}1734 1735	memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);1736 1737	cb0->port_mac_addr = cb0->port_mac_addr >> 16;1738 1739	hret = ehea_h_modify_ehea_port(port->adapter->handle,1740				       port->logical_port_id, H_PORT_CB0,1741				       EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);1742	if (hret != H_SUCCESS) {1743		ret = -EIO;1744		goto out_free;1745	}1746 1747	eth_hw_addr_set(dev, mac_addr->sa_data);1748 1749	/* Deregister old MAC in pHYP */1750	if (port->state == EHEA_PORT_UP) {1751		ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);1752		if (ret)1753			goto out_upregs;1754	}1755 1756	port->mac_addr = cb0->port_mac_addr << 16;1757 1758	/* Register new MAC in pHYP */1759	if (port->state == EHEA_PORT_UP) {1760		ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);1761		if (ret)1762			goto out_upregs;1763	}1764 1765	ret = 0;1766 1767out_upregs:1768	ehea_update_bcmc_registrations();1769out_free:1770	free_page((unsigned long)cb0);1771out:1772	return ret;1773}1774 1775static void ehea_promiscuous_error(u64 hret, int enable)1776{1777	if (hret == H_AUTHORITY)1778		pr_info("Hypervisor denied %sabling promiscuous mode\n",1779			enable == 1 ? "en" : "dis");1780	else1781		pr_err("failed %sabling promiscuous mode\n",1782		       enable == 1 ? "en" : "dis");1783}1784 1785static void ehea_promiscuous(struct net_device *dev, int enable)1786{1787	struct ehea_port *port = netdev_priv(dev);1788	struct hcp_ehea_port_cb7 *cb7;1789	u64 hret;1790 1791	if (enable == port->promisc)1792		return;1793 1794	cb7 = (void *)get_zeroed_page(GFP_ATOMIC);1795	if (!cb7) {1796		pr_err("no mem for cb7\n");1797		goto out;1798	}1799 1800	/* Modify Pxs_DUCQPN in CB7 */1801	cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;1802 1803	hret = ehea_h_modify_ehea_port(port->adapter->handle,1804				       port->logical_port_id,1805				       H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);1806	if (hret) {1807		ehea_promiscuous_error(hret, enable);1808		goto out;1809	}1810 1811	port->promisc = enable;1812out:1813	free_page((unsigned long)cb7);1814}1815 1816static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,1817				     u32 hcallid)1818{1819	u64 hret;1820	u8 reg_type;1821 1822	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;1823	if (mc_mac_addr == 0)1824		reg_type |= EHEA_BCMC_SCOPE_ALL;1825 1826	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,1827				     port->logical_port_id,1828				     reg_type, mc_mac_addr, 0, hcallid);1829	if (hret)1830		goto out;1831 1832	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;1833	if (mc_mac_addr == 0)1834		reg_type |= EHEA_BCMC_SCOPE_ALL;1835 1836	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,1837				     port->logical_port_id,1838				     reg_type, mc_mac_addr, 0, hcallid);1839out:1840	return hret;1841}1842 1843static int ehea_drop_multicast_list(struct net_device *dev)1844{1845	struct ehea_port *port = netdev_priv(dev);1846	struct ehea_mc_list *mc_entry = port->mc_list;1847	struct list_head *pos;1848	struct list_head *temp;1849	int ret = 0;1850	u64 hret;1851 1852	list_for_each_safe(pos, temp, &(port->mc_list->list)) {1853		mc_entry = list_entry(pos, struct ehea_mc_list, list);1854 1855		hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,1856						 H_DEREG_BCMC);1857		if (hret) {1858			pr_err("failed deregistering mcast MAC\n");1859			ret = -EIO;1860		}1861 1862		list_del(pos);1863		kfree(mc_entry);1864	}1865	return ret;1866}1867 1868static void ehea_allmulti(struct net_device *dev, int enable)1869{1870	struct ehea_port *port = netdev_priv(dev);1871	u64 hret;1872 1873	if (!port->allmulti) {1874		if (enable) {1875			/* Enable ALLMULTI */1876			ehea_drop_multicast_list(dev);1877			hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);1878			if (!hret)1879				port->allmulti = 1;1880			else1881				netdev_err(dev,1882					   "failed enabling IFF_ALLMULTI\n");1883		}1884	} else {1885		if (!enable) {1886			/* Disable ALLMULTI */1887			hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);1888			if (!hret)1889				port->allmulti = 0;1890			else1891				netdev_err(dev,1892					   "failed disabling IFF_ALLMULTI\n");1893		}1894	}1895}1896 1897static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)1898{1899	struct ehea_mc_list *ehea_mcl_entry;1900	u64 hret;1901 1902	ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);1903	if (!ehea_mcl_entry)1904		return;1905 1906	INIT_LIST_HEAD(&ehea_mcl_entry->list);1907 1908	memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);1909 1910	hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,1911					 H_REG_BCMC);1912	if (!hret)1913		list_add(&ehea_mcl_entry->list, &port->mc_list->list);1914	else {1915		pr_err("failed registering mcast MAC\n");1916		kfree(ehea_mcl_entry);1917	}1918}1919 1920static void ehea_set_multicast_list(struct net_device *dev)1921{1922	struct ehea_port *port = netdev_priv(dev);1923	struct netdev_hw_addr *ha;1924	int ret;1925 1926	ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));1927 1928	if (dev->flags & IFF_ALLMULTI) {1929		ehea_allmulti(dev, 1);1930		goto out;1931	}1932	ehea_allmulti(dev, 0);1933 1934	if (!netdev_mc_empty(dev)) {1935		ret = ehea_drop_multicast_list(dev);1936		if (ret) {1937			/* Dropping the current multicast list failed.1938			 * Enabling ALL_MULTI is the best we can do.1939			 */1940			ehea_allmulti(dev, 1);1941		}1942 1943		if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {1944			pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",1945				port->adapter->max_mc_mac);1946			goto out;1947		}1948 1949		netdev_for_each_mc_addr(ha, dev)1950			ehea_add_multicast_entry(port, ha->addr);1951 1952	}1953out:1954	ehea_update_bcmc_registrations();1955}1956 1957static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)1958{1959	swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;1960 1961	if (vlan_get_protocol(skb) != htons(ETH_P_IP))1962		return;1963 1964	if (skb->ip_summed == CHECKSUM_PARTIAL)1965		swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;1966 1967	swqe->ip_start = skb_network_offset(skb);1968	swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;1969 1970	switch (ip_hdr(skb)->protocol) {1971	case IPPROTO_UDP:1972		if (skb->ip_summed == CHECKSUM_PARTIAL)1973			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;1974 1975		swqe->tcp_offset = swqe->ip_end + 1 +1976				   offsetof(struct udphdr, check);1977		break;1978 1979	case IPPROTO_TCP:1980		if (skb->ip_summed == CHECKSUM_PARTIAL)1981			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;1982 1983		swqe->tcp_offset = swqe->ip_end + 1 +1984				   offsetof(struct tcphdr, check);1985		break;1986	}1987}1988 1989static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,1990		       struct ehea_swqe *swqe, u32 lkey)1991{1992	swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;1993 1994	xmit_common(skb, swqe);1995 1996	write_swqe2_data(skb, dev, swqe, lkey);1997}1998 1999static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,2000		       struct ehea_swqe *swqe)2001{2002	u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];2003 2004	xmit_common(skb, swqe);2005 2006	if (!skb->data_len)2007		skb_copy_from_linear_data(skb, imm_data, skb->len);2008	else2009		skb_copy_bits(skb, 0, imm_data, skb->len);2010 2011	swqe->immediate_data_length = skb->len;2012	dev_consume_skb_any(skb);2013}2014 2015static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)2016{2017	struct ehea_port *port = netdev_priv(dev);2018	struct ehea_swqe *swqe;2019	u32 lkey;2020	int swqe_index;2021	struct ehea_port_res *pr;2022	struct netdev_queue *txq;2023 2024	pr = &port->port_res[skb_get_queue_mapping(skb)];2025	txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));2026 2027	swqe = ehea_get_swqe(pr->qp, &swqe_index);2028	memset(swqe, 0, SWQE_HEADER_SIZE);2029	atomic_dec(&pr->swqe_avail);2030 2031	if (skb_vlan_tag_present(skb)) {2032		swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;2033		swqe->vlan_tag = skb_vlan_tag_get(skb);2034	}2035 2036	pr->tx_packets++;2037	pr->tx_bytes += skb->len;2038 2039	if (skb->len <= SWQE3_MAX_IMM) {2040		u32 sig_iv = port->sig_comp_iv;2041		u32 swqe_num = pr->swqe_id_counter;2042		ehea_xmit3(skb, dev, swqe);2043		swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)2044			| EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);2045		if (pr->swqe_ll_count >= (sig_iv - 1)) {2046			swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,2047						      sig_iv);2048			swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;2049			pr->swqe_ll_count = 0;2050		} else2051			pr->swqe_ll_count += 1;2052	} else {2053		swqe->wr_id =2054			EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)2055		      | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)2056		      | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)2057		      | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);2058		pr->sq_skba.arr[pr->sq_skba.index] = skb;2059 2060		pr->sq_skba.index++;2061		pr->sq_skba.index &= (pr->sq_skba.len - 1);2062 2063		lkey = pr->send_mr.lkey;2064		ehea_xmit2(skb, dev, swqe, lkey);2065		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;2066	}2067	pr->swqe_id_counter += 1;2068 2069	netif_info(port, tx_queued, dev,2070		   "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);2071	if (netif_msg_tx_queued(port))2072		ehea_dump(swqe, 512, "swqe");2073 2074	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {2075		netif_tx_stop_queue(txq);2076		swqe->tx_control |= EHEA_SWQE_PURGE;2077	}2078 2079	ehea_post_swqe(pr->qp, swqe);2080 2081	if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {2082		pr->p_stats.queue_stopped++;2083		netif_tx_stop_queue(txq);2084	}2085 2086	return NETDEV_TX_OK;2087}2088 2089static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)2090{2091	struct ehea_port *port = netdev_priv(dev);2092	struct ehea_adapter *adapter = port->adapter;2093	struct hcp_ehea_port_cb1 *cb1;2094	int index;2095	u64 hret;2096	int err = 0;2097 2098	cb1 = (void *)get_zeroed_page(GFP_KERNEL);2099	if (!cb1) {2100		pr_err("no mem for cb1\n");2101		err = -ENOMEM;2102		goto out;2103	}2104 2105	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,2106				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);2107	if (hret != H_SUCCESS) {2108		pr_err("query_ehea_port failed\n");2109		err = -EINVAL;2110		goto out;2111	}2112 2113	index = (vid / 64);2114	cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));2115 2116	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,2117				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);2118	if (hret != H_SUCCESS) {2119		pr_err("modify_ehea_port failed\n");2120		err = -EINVAL;2121	}2122out:2123	free_page((unsigned long)cb1);2124	return err;2125}2126 2127static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)2128{2129	struct ehea_port *port = netdev_priv(dev);2130	struct ehea_adapter *adapter = port->adapter;2131	struct hcp_ehea_port_cb1 *cb1;2132	int index;2133	u64 hret;2134	int err = 0;2135 2136	cb1 = (void *)get_zeroed_page(GFP_KERNEL);2137	if (!cb1) {2138		pr_err("no mem for cb1\n");2139		err = -ENOMEM;2140		goto out;2141	}2142 2143	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,2144				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);2145	if (hret != H_SUCCESS) {2146		pr_err("query_ehea_port failed\n");2147		err = -EINVAL;2148		goto out;2149	}2150 2151	index = (vid / 64);2152	cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));2153 2154	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,2155				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);2156	if (hret != H_SUCCESS) {2157		pr_err("modify_ehea_port failed\n");2158		err = -EINVAL;2159	}2160out:2161	free_page((unsigned long)cb1);2162	return err;2163}2164 2165static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)2166{2167	int ret = -EIO;2168	u64 hret;2169	u16 dummy16 = 0;2170	u64 dummy64 = 0;2171	struct hcp_modify_qp_cb0 *cb0;2172 2173	cb0 = (void *)get_zeroed_page(GFP_KERNEL);2174	if (!cb0) {2175		ret = -ENOMEM;2176		goto out;2177	}2178 2179	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,2180				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);2181	if (hret != H_SUCCESS) {2182		pr_err("query_ehea_qp failed (1)\n");2183		goto out;2184	}2185 2186	cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;2187	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,2188				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,2189				     &dummy64, &dummy64, &dummy16, &dummy16);2190	if (hret != H_SUCCESS) {2191		pr_err("modify_ehea_qp failed (1)\n");2192		goto out;2193	}2194 2195	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,2196				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);2197	if (hret != H_SUCCESS) {2198		pr_err("query_ehea_qp failed (2)\n");2199		goto out;2200	}2201 2202	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;2203	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,2204				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,2205				     &dummy64, &dummy64, &dummy16, &dummy16);2206	if (hret != H_SUCCESS) {2207		pr_err("modify_ehea_qp failed (2)\n");2208		goto out;2209	}2210 2211	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,2212				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);2213	if (hret != H_SUCCESS) {2214		pr_err("query_ehea_qp failed (3)\n");2215		goto out;2216	}2217 2218	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;2219	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,2220				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,2221				     &dummy64, &dummy64, &dummy16, &dummy16);2222	if (hret != H_SUCCESS) {2223		pr_err("modify_ehea_qp failed (3)\n");2224		goto out;2225	}2226 2227	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,2228				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);2229	if (hret != H_SUCCESS) {2230		pr_err("query_ehea_qp failed (4)\n");2231		goto out;2232	}2233 2234	ret = 0;2235out:2236	free_page((unsigned long)cb0);2237	return ret;2238}2239 2240static int ehea_port_res_setup(struct ehea_port *port, int def_qps)2241{2242	int ret, i;2243	struct port_res_cfg pr_cfg, pr_cfg_small_rx;2244	enum ehea_eq_type eq_type = EHEA_EQ;2245 2246	port->qp_eq = ehea_create_eq(port->adapter, eq_type,2247				   EHEA_MAX_ENTRIES_EQ, 1);2248	if (!port->qp_eq) {2249		ret = -EINVAL;2250		pr_err("ehea_create_eq failed (qp_eq)\n");2251		goto out_kill_eq;2252	}2253 2254	pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;2255	pr_cfg.max_entries_scq = sq_entries * 2;2256	pr_cfg.max_entries_sq = sq_entries;2257	pr_cfg.max_entries_rq1 = rq1_entries;2258	pr_cfg.max_entries_rq2 = rq2_entries;2259	pr_cfg.max_entries_rq3 = rq3_entries;2260 2261	pr_cfg_small_rx.max_entries_rcq = 1;2262	pr_cfg_small_rx.max_entries_scq = sq_entries;2263	pr_cfg_small_rx.max_entries_sq = sq_entries;2264	pr_cfg_small_rx.max_entries_rq1 = 1;2265	pr_cfg_small_rx.max_entries_rq2 = 1;2266	pr_cfg_small_rx.max_entries_rq3 = 1;2267 2268	for (i = 0; i < def_qps; i++) {2269		ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);2270		if (ret)2271			goto out_clean_pr;2272	}2273	for (i = def_qps; i < def_qps; i++) {2274		ret = ehea_init_port_res(port, &port->port_res[i],2275					 &pr_cfg_small_rx, i);2276		if (ret)2277			goto out_clean_pr;2278	}2279 2280	return 0;2281 2282out_clean_pr:2283	while (--i >= 0)2284		ehea_clean_portres(port, &port->port_res[i]);2285 2286out_kill_eq:2287	ehea_destroy_eq(port->qp_eq);2288	return ret;2289}2290 2291static int ehea_clean_all_portres(struct ehea_port *port)2292{2293	int ret = 0;2294	int i;2295 2296	for (i = 0; i < port->num_def_qps; i++)2297		ret |= ehea_clean_portres(port, &port->port_res[i]);2298 2299	ret |= ehea_destroy_eq(port->qp_eq);2300 2301	return ret;2302}2303 2304static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)2305{2306	if (adapter->active_ports)2307		return;2308 2309	ehea_rem_mr(&adapter->mr);2310}2311 2312static int ehea_add_adapter_mr(struct ehea_adapter *adapter)2313{2314	if (adapter->active_ports)2315		return 0;2316 2317	return ehea_reg_kernel_mr(adapter, &adapter->mr);2318}2319 2320static int ehea_up(struct net_device *dev)2321{2322	int ret, i;2323	struct ehea_port *port = netdev_priv(dev);2324 2325	if (port->state == EHEA_PORT_UP)2326		return 0;2327 2328	ret = ehea_port_res_setup(port, port->num_def_qps);2329	if (ret) {2330		netdev_err(dev, "port_res_failed\n");2331		goto out;2332	}2333 2334	/* Set default QP for this port */2335	ret = ehea_configure_port(port);2336	if (ret) {2337		netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);2338		goto out_clean_pr;2339	}2340 2341	ret = ehea_reg_interrupts(dev);2342	if (ret) {2343		netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);2344		goto out_clean_pr;2345	}2346 2347	for (i = 0; i < port->num_def_qps; i++) {2348		ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);2349		if (ret) {2350			netdev_err(dev, "activate_qp failed\n");2351			goto out_free_irqs;2352		}2353	}2354 2355	for (i = 0; i < port->num_def_qps; i++) {2356		ret = ehea_fill_port_res(&port->port_res[i]);2357		if (ret) {2358			netdev_err(dev, "out_free_irqs\n");2359			goto out_free_irqs;2360		}2361	}2362 2363	ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);2364	if (ret) {2365		ret = -EIO;2366		goto out_free_irqs;2367	}2368 2369	port->state = EHEA_PORT_UP;2370 2371	ret = 0;2372	goto out;2373 2374out_free_irqs:2375	ehea_free_interrupts(dev);2376 2377out_clean_pr:2378	ehea_clean_all_portres(port);2379out:2380	if (ret)2381		netdev_info(dev, "Failed starting. ret=%i\n", ret);2382 2383	ehea_update_bcmc_registrations();2384	ehea_update_firmware_handles();2385 2386	return ret;2387}2388 2389static void port_napi_disable(struct ehea_port *port)2390{2391	int i;2392 2393	for (i = 0; i < port->num_def_qps; i++)2394		napi_disable(&port->port_res[i].napi);2395}2396 2397static void port_napi_enable(struct ehea_port *port)2398{2399	int i;2400 2401	for (i = 0; i < port->num_def_qps; i++)2402		napi_enable(&port->port_res[i].napi);2403}2404 2405static int ehea_open(struct net_device *dev)2406{2407	int ret;2408	struct ehea_port *port = netdev_priv(dev);2409 2410	mutex_lock(&port->port_lock);2411 2412	netif_info(port, ifup, dev, "enabling port\n");2413 2414	netif_carrier_off(dev);2415 2416	ret = ehea_up(dev);2417	if (!ret) {2418		port_napi_enable(port);2419		netif_tx_start_all_queues(dev);2420	}2421 2422	mutex_unlock(&port->port_lock);2423	schedule_delayed_work(&port->stats_work,2424			      round_jiffies_relative(msecs_to_jiffies(1000)));2425 2426	return ret;2427}2428 2429static int ehea_down(struct net_device *dev)2430{2431	int ret;2432	struct ehea_port *port = netdev_priv(dev);2433 2434	if (port->state == EHEA_PORT_DOWN)2435		return 0;2436 2437	ehea_drop_multicast_list(dev);2438	ehea_allmulti(dev, 0);2439	ehea_broadcast_reg_helper(port, H_DEREG_BCMC);2440 2441	ehea_free_interrupts(dev);2442 2443	port->state = EHEA_PORT_DOWN;2444 2445	ehea_update_bcmc_registrations();2446 2447	ret = ehea_clean_all_portres(port);2448	if (ret)2449		netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);2450 2451	ehea_update_firmware_handles();2452 2453	return ret;2454}2455 2456static int ehea_stop(struct net_device *dev)2457{2458	int ret;2459	struct ehea_port *port = netdev_priv(dev);2460 2461	netif_info(port, ifdown, dev, "disabling port\n");2462 2463	set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);2464	cancel_work_sync(&port->reset_task);2465	cancel_delayed_work_sync(&port->stats_work);2466	mutex_lock(&port->port_lock);2467	netif_tx_stop_all_queues(dev);2468	port_napi_disable(port);2469	ret = ehea_down(dev);2470	mutex_unlock(&port->port_lock);2471	clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);2472	return ret;2473}2474 2475static void ehea_purge_sq(struct ehea_qp *orig_qp)2476{2477	struct ehea_qp qp = *orig_qp;2478	struct ehea_qp_init_attr *init_attr = &qp.init_attr;2479	struct ehea_swqe *swqe;2480	int wqe_index;2481	int i;2482 2483	for (i = 0; i < init_attr->act_nr_send_wqes; i++) {2484		swqe = ehea_get_swqe(&qp, &wqe_index);2485		swqe->tx_control |= EHEA_SWQE_PURGE;2486	}2487}2488 2489static void ehea_flush_sq(struct ehea_port *port)2490{2491	int i;2492 2493	for (i = 0; i < port->num_def_qps; i++) {2494		struct ehea_port_res *pr = &port->port_res[i];2495		int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;2496		int ret;2497 2498		ret = wait_event_timeout(port->swqe_avail_wq,2499			 atomic_read(&pr->swqe_avail) >= swqe_max,2500			 msecs_to_jiffies(100));2501 2502		if (!ret) {2503			pr_err("WARNING: sq not flushed completely\n");2504			break;2505		}2506	}2507}2508 2509static int ehea_stop_qps(struct net_device *dev)2510{2511	struct ehea_port *port = netdev_priv(dev);2512	struct ehea_adapter *adapter = port->adapter;2513	struct hcp_modify_qp_cb0 *cb0;2514	int ret = -EIO;2515	int dret;2516	int i;2517	u64 hret;2518	u64 dummy64 = 0;2519	u16 dummy16 = 0;2520 2521	cb0 = (void *)get_zeroed_page(GFP_KERNEL);2522	if (!cb0) {2523		ret = -ENOMEM;2524		goto out;2525	}2526 2527	for (i = 0; i < (port->num_def_qps); i++) {2528		struct ehea_port_res *pr =  &port->port_res[i];2529		struct ehea_qp *qp = pr->qp;2530 2531		/* Purge send queue */2532		ehea_purge_sq(qp);2533 2534		/* Disable queue pair */2535		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,2536					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),2537					    cb0);2538		if (hret != H_SUCCESS) {2539			pr_err("query_ehea_qp failed (1)\n");2540			goto out;2541		}2542 2543		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;2544		cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;2545 2546		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,2547					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,2548							    1), cb0, &dummy64,2549					     &dummy64, &dummy16, &dummy16);2550		if (hret != H_SUCCESS) {2551			pr_err("modify_ehea_qp failed (1)\n");2552			goto out;2553		}2554 2555		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,2556					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),2557					    cb0);2558		if (hret != H_SUCCESS) {2559			pr_err("query_ehea_qp failed (2)\n");2560			goto out;2561		}2562 2563		/* deregister shared memory regions */2564		dret = ehea_rem_smrs(pr);2565		if (dret) {2566			pr_err("unreg shared memory region failed\n");2567			goto out;2568		}2569	}2570 2571	ret = 0;2572out:2573	free_page((unsigned long)cb0);2574 2575	return ret;2576}2577 2578static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)2579{2580	struct ehea_qp qp = *orig_qp;2581	struct ehea_qp_init_attr *init_attr = &qp.init_attr;2582	struct ehea_rwqe *rwqe;2583	struct sk_buff **skba_rq2 = pr->rq2_skba.arr;2584	struct sk_buff **skba_rq3 = pr->rq3_skba.arr;2585	struct sk_buff *skb;2586	u32 lkey = pr->recv_mr.lkey;2587 2588 2589	int i;2590	int index;2591 2592	for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {2593		rwqe = ehea_get_next_rwqe(&qp, 2);2594		rwqe->sg_list[0].l_key = lkey;2595		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);2596		skb = skba_rq2[index];2597		if (skb)2598			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);2599	}2600 2601	for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {2602		rwqe = ehea_get_next_rwqe(&qp, 3);2603		rwqe->sg_list[0].l_key = lkey;2604		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);2605		skb = skba_rq3[index];2606		if (skb)2607			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);2608	}2609}2610 2611static int ehea_restart_qps(struct net_device *dev)2612{2613	struct ehea_port *port = netdev_priv(dev);2614	struct ehea_adapter *adapter = port->adapter;2615	int ret = 0;2616	int i;2617 2618	struct hcp_modify_qp_cb0 *cb0;2619	u64 hret;2620	u64 dummy64 = 0;2621	u16 dummy16 = 0;2622 2623	cb0 = (void *)get_zeroed_page(GFP_KERNEL);2624	if (!cb0)2625		return -ENOMEM;2626 2627	for (i = 0; i < (port->num_def_qps); i++) {2628		struct ehea_port_res *pr =  &port->port_res[i];2629		struct ehea_qp *qp = pr->qp;2630 2631		ret = ehea_gen_smrs(pr);2632		if (ret) {2633			netdev_err(dev, "creation of shared memory regions failed\n");2634			goto out;2635		}2636 2637		ehea_update_rqs(qp, pr);2638 2639		/* Enable queue pair */2640		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,2641					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),2642					    cb0);2643		if (hret != H_SUCCESS) {2644			netdev_err(dev, "query_ehea_qp failed (1)\n");2645			ret = -EFAULT;2646			goto out;2647		}2648 2649		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;2650		cb0->qp_ctl_reg |= H_QP_CR_ENABLED;2651 2652		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,2653					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,2654							    1), cb0, &dummy64,2655					     &dummy64, &dummy16, &dummy16);2656		if (hret != H_SUCCESS) {2657			netdev_err(dev, "modify_ehea_qp failed (1)\n");2658			ret = -EFAULT;2659			goto out;2660		}2661 2662		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,2663					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),2664					    cb0);2665		if (hret != H_SUCCESS) {2666			netdev_err(dev, "query_ehea_qp failed (2)\n");2667			ret = -EFAULT;2668			goto out;2669		}2670 2671		/* refill entire queue */2672		ehea_refill_rq1(pr, pr->rq1_skba.index, 0);2673		ehea_refill_rq2(pr, 0);2674		ehea_refill_rq3(pr, 0);2675	}2676out:2677	free_page((unsigned long)cb0);2678 2679	return ret;2680}2681 2682static void ehea_reset_port(struct work_struct *work)2683{2684	int ret;2685	struct ehea_port *port =2686		container_of(work, struct ehea_port, reset_task);2687	struct net_device *dev = port->netdev;2688 2689	mutex_lock(&dlpar_mem_lock);2690	port->resets++;2691	mutex_lock(&port->port_lock);2692	netif_tx_disable(dev);2693 2694	port_napi_disable(port);2695 2696	ehea_down(dev);2697 2698	ret = ehea_up(dev);2699	if (ret)2700		goto out;2701 2702	ehea_set_multicast_list(dev);2703 2704	netif_info(port, timer, dev, "reset successful\n");2705 2706	port_napi_enable(port);2707 2708	netif_tx_wake_all_queues(dev);2709out:2710	mutex_unlock(&port->port_lock);2711	mutex_unlock(&dlpar_mem_lock);2712}2713 2714static void ehea_rereg_mrs(void)2715{2716	int ret, i;2717	struct ehea_adapter *adapter;2718 2719	pr_info("LPAR memory changed - re-initializing driver\n");2720 2721	list_for_each_entry(adapter, &adapter_list, list)2722		if (adapter->active_ports) {2723			/* Shutdown all ports */2724			for (i = 0; i < EHEA_MAX_PORTS; i++) {2725				struct ehea_port *port = adapter->port[i];2726				struct net_device *dev;2727 2728				if (!port)2729					continue;2730 2731				dev = port->netdev;2732 2733				if (dev->flags & IFF_UP) {2734					mutex_lock(&port->port_lock);2735					netif_tx_disable(dev);2736					ehea_flush_sq(port);2737					ret = ehea_stop_qps(dev);2738					if (ret) {2739						mutex_unlock(&port->port_lock);2740						goto out;2741					}2742					port_napi_disable(port);2743					mutex_unlock(&port->port_lock);2744				}2745				reset_sq_restart_flag(port);2746			}2747 2748			/* Unregister old memory region */2749			ret = ehea_rem_mr(&adapter->mr);2750			if (ret) {2751				pr_err("unregister MR failed - driver inoperable!\n");2752				goto out;2753			}2754		}2755 2756	clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);2757 2758	list_for_each_entry(adapter, &adapter_list, list)2759		if (adapter->active_ports) {2760			/* Register new memory region */2761			ret = ehea_reg_kernel_mr(adapter, &adapter->mr);2762			if (ret) {2763				pr_err("register MR failed - driver inoperable!\n");2764				goto out;2765			}2766 2767			/* Restart all ports */2768			for (i = 0; i < EHEA_MAX_PORTS; i++) {2769				struct ehea_port *port = adapter->port[i];2770 2771				if (port) {2772					struct net_device *dev = port->netdev;2773 2774					if (dev->flags & IFF_UP) {2775						mutex_lock(&port->port_lock);2776						ret = ehea_restart_qps(dev);2777						if (!ret) {2778							check_sqs(port);2779							port_napi_enable(port);2780							netif_tx_wake_all_queues(dev);2781						} else {2782							netdev_err(dev, "Unable to restart QPS\n");2783						}2784						mutex_unlock(&port->port_lock);2785					}2786				}2787			}2788		}2789	pr_info("re-initializing driver complete\n");2790out:2791	return;2792}2793 2794static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue)2795{2796	struct ehea_port *port = netdev_priv(dev);2797 2798	if (netif_carrier_ok(dev) &&2799	    !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))2800		ehea_schedule_port_reset(port);2801}2802 2803static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)2804{2805	struct hcp_query_ehea *cb;2806	u64 hret;2807	int ret;2808 2809	cb = (void *)get_zeroed_page(GFP_KERNEL);2810	if (!cb) {2811		ret = -ENOMEM;2812		goto out;2813	}2814 2815	hret = ehea_h_query_ehea(adapter->handle, cb);2816 2817	if (hret != H_SUCCESS) {2818		ret = -EIO;2819		goto out_herr;2820	}2821 2822	adapter->max_mc_mac = cb->max_mc_mac - 1;2823	ret = 0;2824 2825out_herr:2826	free_page((unsigned long)cb);2827out:2828	return ret;2829}2830 2831static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)2832{2833	struct hcp_ehea_port_cb4 *cb4;2834	u64 hret;2835	int ret = 0;2836 2837	*jumbo = 0;2838 2839	/* (Try to) enable *jumbo frames */2840	cb4 = (void *)get_zeroed_page(GFP_KERNEL);2841	if (!cb4) {2842		pr_err("no mem for cb4\n");2843		ret = -ENOMEM;2844		goto out;2845	} else {2846		hret = ehea_h_query_ehea_port(port->adapter->handle,2847					      port->logical_port_id,2848					      H_PORT_CB4,2849					      H_PORT_CB4_JUMBO, cb4);2850		if (hret == H_SUCCESS) {2851			if (cb4->jumbo_frame)2852				*jumbo = 1;2853			else {2854				cb4->jumbo_frame = 1;2855				hret = ehea_h_modify_ehea_port(port->adapter->2856							       handle,2857							       port->2858							       logical_port_id,2859							       H_PORT_CB4,2860							       H_PORT_CB4_JUMBO,2861							       cb4);2862				if (hret == H_SUCCESS)2863					*jumbo = 1;2864			}2865		} else2866			ret = -EINVAL;2867 2868		free_page((unsigned long)cb4);2869	}2870out:2871	return ret;2872}2873 2874static ssize_t log_port_id_show(struct device *dev,2875				struct device_attribute *attr, char *buf)2876{2877	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);2878	return sprintf(buf, "%d", port->logical_port_id);2879}2880 2881static DEVICE_ATTR_RO(log_port_id);2882 2883static void logical_port_release(struct device *dev)2884{2885	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);2886	of_node_put(port->ofdev.dev.of_node);2887}2888 2889static struct device *ehea_register_port(struct ehea_port *port,2890					 struct device_node *dn)2891{2892	int ret;2893 2894	port->ofdev.dev.of_node = of_node_get(dn);2895	port->ofdev.dev.parent = &port->adapter->ofdev->dev;2896	port->ofdev.dev.bus = &ibmebus_bus_type;2897 2898	dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);2899	port->ofdev.dev.release = logical_port_release;2900 2901	ret = of_device_register(&port->ofdev);2902	if (ret) {2903		pr_err("failed to register device. ret=%d\n", ret);2904		put_device(&port->ofdev.dev);2905		goto out;2906	}2907 2908	ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);2909	if (ret) {2910		pr_err("failed to register attributes, ret=%d\n", ret);2911		goto out_unreg_of_dev;2912	}2913 2914	return &port->ofdev.dev;2915 2916out_unreg_of_dev:2917	of_device_unregister(&port->ofdev);2918out:2919	return NULL;2920}2921 2922static void ehea_unregister_port(struct ehea_port *port)2923{2924	device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);2925	of_device_unregister(&port->ofdev);2926}2927 2928static const struct net_device_ops ehea_netdev_ops = {2929	.ndo_open		= ehea_open,2930	.ndo_stop		= ehea_stop,2931	.ndo_start_xmit		= ehea_start_xmit,2932	.ndo_get_stats64	= ehea_get_stats64,2933	.ndo_set_mac_address	= ehea_set_mac_addr,2934	.ndo_validate_addr	= eth_validate_addr,2935	.ndo_set_rx_mode	= ehea_set_multicast_list,2936	.ndo_vlan_rx_add_vid	= ehea_vlan_rx_add_vid,2937	.ndo_vlan_rx_kill_vid	= ehea_vlan_rx_kill_vid,2938	.ndo_tx_timeout		= ehea_tx_watchdog,2939};2940 2941static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,2942					 u32 logical_port_id,2943					 struct device_node *dn)2944{2945	int ret;2946	struct net_device *dev;2947	struct ehea_port *port;2948	struct device *port_dev;2949	int jumbo;2950 2951	/* allocate memory for the port structures */2952	dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);2953 2954	if (!dev) {2955		ret = -ENOMEM;2956		goto out_err;2957	}2958 2959	port = netdev_priv(dev);2960 2961	mutex_init(&port->port_lock);2962	port->state = EHEA_PORT_DOWN;2963	port->sig_comp_iv = sq_entries / 10;2964 2965	port->adapter = adapter;2966	port->netdev = dev;2967	port->logical_port_id = logical_port_id;2968 2969	port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);2970 2971	port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);2972	if (!port->mc_list) {2973		ret = -ENOMEM;2974		goto out_free_ethdev;2975	}2976 2977	INIT_LIST_HEAD(&port->mc_list->list);2978 2979	ret = ehea_sense_port_attr(port);2980	if (ret)2981		goto out_free_mc_list;2982 2983	netif_set_real_num_rx_queues(dev, port->num_def_qps);2984	netif_set_real_num_tx_queues(dev, port->num_def_qps);2985 2986	port_dev = ehea_register_port(port, dn);2987	if (!port_dev)2988		goto out_free_mc_list;2989 2990	SET_NETDEV_DEV(dev, port_dev);2991 2992	/* initialize net_device structure */2993	eth_hw_addr_set(dev, (u8 *)&port->mac_addr);2994 2995	dev->netdev_ops = &ehea_netdev_ops;2996	ehea_set_ethtool_ops(dev);2997 2998	dev->hw_features = NETIF_F_SG | NETIF_F_TSO |2999		      NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;3000	dev->features = NETIF_F_SG | NETIF_F_TSO |3001		      NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |3002		      NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |3003		      NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;3004	dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |3005			NETIF_F_IP_CSUM;3006	dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;3007 3008	/* MTU range: 68 - 9022 */3009	dev->min_mtu = ETH_MIN_MTU;3010	dev->max_mtu = EHEA_MAX_PACKET_SIZE;3011 3012	INIT_WORK(&port->reset_task, ehea_reset_port);3013	INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);3014 3015	init_waitqueue_head(&port->swqe_avail_wq);3016	init_waitqueue_head(&port->restart_wq);3017 3018	ret = register_netdev(dev);3019	if (ret) {3020		pr_err("register_netdev failed. ret=%d\n", ret);3021		goto out_unreg_port;3022	}3023 3024	ret = ehea_get_jumboframe_status(port, &jumbo);3025	if (ret)3026		netdev_err(dev, "failed determining jumbo frame status\n");3027 3028	netdev_info(dev, "Jumbo frames are %sabled\n",3029		    jumbo == 1 ? "en" : "dis");3030 3031	adapter->active_ports++;3032 3033	return port;3034 3035out_unreg_port:3036	ehea_unregister_port(port);3037 3038out_free_mc_list:3039	kfree(port->mc_list);3040 3041out_free_ethdev:3042	free_netdev(dev);3043 3044out_err:3045	pr_err("setting up logical port with id=%d failed, ret=%d\n",3046	       logical_port_id, ret);3047	return NULL;3048}3049 3050static void ehea_shutdown_single_port(struct ehea_port *port)3051{3052	struct ehea_adapter *adapter = port->adapter;3053 3054	cancel_work_sync(&port->reset_task);3055	cancel_delayed_work_sync(&port->stats_work);3056	unregister_netdev(port->netdev);3057	ehea_unregister_port(port);3058	kfree(port->mc_list);3059	free_netdev(port->netdev);3060	adapter->active_ports--;3061}3062 3063static int ehea_setup_ports(struct ehea_adapter *adapter)3064{3065	struct device_node *lhea_dn;3066	struct device_node *eth_dn;3067 3068	const u32 *dn_log_port_id;3069	int i = 0;3070 3071	lhea_dn = adapter->ofdev->dev.of_node;3072	for_each_child_of_node(lhea_dn, eth_dn) {3073		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",3074						 NULL);3075		if (!dn_log_port_id) {3076			pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);3077			continue;3078		}3079 3080		if (ehea_add_adapter_mr(adapter)) {3081			pr_err("creating MR failed\n");3082			of_node_put(eth_dn);3083			return -EIO;3084		}3085 3086		adapter->port[i] = ehea_setup_single_port(adapter,3087							  *dn_log_port_id,3088							  eth_dn);3089		if (adapter->port[i])3090			netdev_info(adapter->port[i]->netdev,3091				    "logical port id #%d\n", *dn_log_port_id);3092		else3093			ehea_remove_adapter_mr(adapter);3094 3095		i++;3096	}3097	return 0;3098}3099 3100static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,3101					   u32 logical_port_id)3102{3103	struct device_node *lhea_dn;3104	struct device_node *eth_dn;3105	const u32 *dn_log_port_id;3106 3107	lhea_dn = adapter->ofdev->dev.of_node;3108	for_each_child_of_node(lhea_dn, eth_dn) {3109		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",3110						 NULL);3111		if (dn_log_port_id)3112			if (*dn_log_port_id == logical_port_id)3113				return eth_dn;3114	}3115 3116	return NULL;3117}3118 3119static ssize_t probe_port_store(struct device *dev,3120			       struct device_attribute *attr,3121			       const char *buf, size_t count)3122{3123	struct ehea_adapter *adapter = dev_get_drvdata(dev);3124	struct ehea_port *port;3125	struct device_node *eth_dn = NULL;3126	int i;3127 3128	u32 logical_port_id;3129 3130	sscanf(buf, "%d", &logical_port_id);3131 3132	port = ehea_get_port(adapter, logical_port_id);3133 3134	if (port) {3135		netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",3136			    logical_port_id);3137		return -EINVAL;3138	}3139 3140	eth_dn = ehea_get_eth_dn(adapter, logical_port_id);3141 3142	if (!eth_dn) {3143		pr_info("no logical port with id %d found\n", logical_port_id);3144		return -EINVAL;3145	}3146 3147	if (ehea_add_adapter_mr(adapter)) {3148		pr_err("creating MR failed\n");3149		of_node_put(eth_dn);3150		return -EIO;3151	}3152 3153	port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);3154 3155	of_node_put(eth_dn);3156 3157	if (port) {3158		for (i = 0; i < EHEA_MAX_PORTS; i++)3159			if (!adapter->port[i]) {3160				adapter->port[i] = port;3161				break;3162			}3163 3164		netdev_info(port->netdev, "added: (logical port id=%d)\n",3165			    logical_port_id);3166	} else {3167		ehea_remove_adapter_mr(adapter);3168		return -EIO;3169	}3170 3171	return (ssize_t) count;3172}3173 3174static ssize_t remove_port_store(struct device *dev,3175				 struct device_attribute *attr,3176				 const char *buf, size_t count)3177{3178	struct ehea_adapter *adapter = dev_get_drvdata(dev);3179	struct ehea_port *port;3180	int i;3181	u32 logical_port_id;3182 3183	sscanf(buf, "%d", &logical_port_id);3184 3185	port = ehea_get_port(adapter, logical_port_id);3186 3187	if (port) {3188		netdev_info(port->netdev, "removed: (logical port id=%d)\n",3189			    logical_port_id);3190 3191		ehea_shutdown_single_port(port);3192 3193		for (i = 0; i < EHEA_MAX_PORTS; i++)3194			if (adapter->port[i] == port) {3195				adapter->port[i] = NULL;3196				break;3197			}3198	} else {3199		pr_err("removing port with logical port id=%d failed. port not configured.\n",3200		       logical_port_id);3201		return -EINVAL;3202	}3203 3204	ehea_remove_adapter_mr(adapter);3205 3206	return (ssize_t) count;3207}3208 3209static DEVICE_ATTR_WO(probe_port);3210static DEVICE_ATTR_WO(remove_port);3211 3212static int ehea_create_device_sysfs(struct platform_device *dev)3213{3214	int ret = device_create_file(&dev->dev, &dev_attr_probe_port);3215	if (ret)3216		goto out;3217 3218	ret = device_create_file(&dev->dev, &dev_attr_remove_port);3219out:3220	return ret;3221}3222 3223static void ehea_remove_device_sysfs(struct platform_device *dev)3224{3225	device_remove_file(&dev->dev, &dev_attr_probe_port);3226	device_remove_file(&dev->dev, &dev_attr_remove_port);3227}3228 3229static int ehea_reboot_notifier(struct notifier_block *nb,3230				unsigned long action, void *unused)3231{3232	if (action == SYS_RESTART) {3233		pr_info("Reboot: freeing all eHEA resources\n");3234		ibmebus_unregister_driver(&ehea_driver);3235	}3236	return NOTIFY_DONE;3237}3238 3239static struct notifier_block ehea_reboot_nb = {3240	.notifier_call = ehea_reboot_notifier,3241};3242 3243static int ehea_mem_notifier(struct notifier_block *nb,3244			     unsigned long action, void *data)3245{3246	int ret = NOTIFY_BAD;3247	struct memory_notify *arg = data;3248 3249	mutex_lock(&dlpar_mem_lock);3250 3251	switch (action) {3252	case MEM_CANCEL_OFFLINE:3253		pr_info("memory offlining canceled");3254		fallthrough;	/* re-add canceled memory block */3255 3256	case MEM_ONLINE:3257		pr_info("memory is going online");3258		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);3259		if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))3260			goto out_unlock;3261		ehea_rereg_mrs();3262		break;3263 3264	case MEM_GOING_OFFLINE:3265		pr_info("memory is going offline");3266		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);3267		if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))3268			goto out_unlock;3269		ehea_rereg_mrs();3270		break;3271 3272	default:3273		break;3274	}3275 3276	ehea_update_firmware_handles();3277	ret = NOTIFY_OK;3278 3279out_unlock:3280	mutex_unlock(&dlpar_mem_lock);3281	return ret;3282}3283 3284static struct notifier_block ehea_mem_nb = {3285	.notifier_call = ehea_mem_notifier,3286};3287 3288static void ehea_crash_handler(void)3289{3290	int i;3291 3292	if (ehea_fw_handles.arr)3293		for (i = 0; i < ehea_fw_handles.num_entries; i++)3294			ehea_h_free_resource(ehea_fw_handles.arr[i].adh,3295					     ehea_fw_handles.arr[i].fwh,3296					     FORCE_FREE);3297 3298	if (ehea_bcmc_regs.arr)3299		for (i = 0; i < ehea_bcmc_regs.num_entries; i++)3300			ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,3301					      ehea_bcmc_regs.arr[i].port_id,3302					      ehea_bcmc_regs.arr[i].reg_type,3303					      ehea_bcmc_regs.arr[i].macaddr,3304					      0, H_DEREG_BCMC);3305}3306 3307static atomic_t ehea_memory_hooks_registered;3308 3309/* Register memory hooks on probe of first adapter */3310static int ehea_register_memory_hooks(void)3311{3312	int ret = 0;3313 3314	if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)3315		return 0;3316 3317	ret = ehea_create_busmap();3318	if (ret) {3319		pr_info("ehea_create_busmap failed\n");3320		goto out;3321	}3322 3323	ret = register_reboot_notifier(&ehea_reboot_nb);3324	if (ret) {3325		pr_info("register_reboot_notifier failed\n");3326		goto out;3327	}3328 3329	ret = register_memory_notifier(&ehea_mem_nb);3330	if (ret) {3331		pr_info("register_memory_notifier failed\n");3332		goto out2;3333	}3334 3335	ret = crash_shutdown_register(ehea_crash_handler);3336	if (ret) {3337		pr_info("crash_shutdown_register failed\n");3338		goto out3;3339	}3340 3341	return 0;3342 3343out3:3344	unregister_memory_notifier(&ehea_mem_nb);3345out2:3346	unregister_reboot_notifier(&ehea_reboot_nb);3347out:3348	atomic_dec(&ehea_memory_hooks_registered);3349	return ret;3350}3351 3352static void ehea_unregister_memory_hooks(void)3353{3354	/* Only remove the hooks if we've registered them */3355	if (atomic_read(&ehea_memory_hooks_registered) == 0)3356		return;3357 3358	unregister_reboot_notifier(&ehea_reboot_nb);3359	if (crash_shutdown_unregister(ehea_crash_handler))3360		pr_info("failed unregistering crash handler\n");3361	unregister_memory_notifier(&ehea_mem_nb);3362}3363 3364static int ehea_probe_adapter(struct platform_device *dev)3365{3366	struct ehea_adapter *adapter;3367	const u64 *adapter_handle;3368	int ret;3369	int i;3370 3371	ret = ehea_register_memory_hooks();3372	if (ret)3373		return ret;3374 3375	if (!dev || !dev->dev.of_node) {3376		pr_err("Invalid ibmebus device probed\n");3377		return -EINVAL;3378	}3379 3380	adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);3381	if (!adapter) {3382		ret = -ENOMEM;3383		dev_err(&dev->dev, "no mem for ehea_adapter\n");3384		goto out;3385	}3386 3387	list_add(&adapter->list, &adapter_list);3388 3389	adapter->ofdev = dev;3390 3391	adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",3392					 NULL);3393	if (adapter_handle)3394		adapter->handle = *adapter_handle;3395 3396	if (!adapter->handle) {3397		dev_err(&dev->dev, "failed getting handle for adapter"3398			" '%pOF'\n", dev->dev.of_node);3399		ret = -ENODEV;3400		goto out_free_ad;3401	}3402 3403	adapter->pd = EHEA_PD_ID;3404 3405	platform_set_drvdata(dev, adapter);3406 3407 3408	/* initialize adapter and ports */3409	/* get adapter properties */3410	ret = ehea_sense_adapter_attr(adapter);3411	if (ret) {3412		dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);3413		goto out_free_ad;3414	}3415 3416	adapter->neq = ehea_create_eq(adapter,3417				      EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);3418	if (!adapter->neq) {3419		ret = -EIO;3420		dev_err(&dev->dev, "NEQ creation failed\n");3421		goto out_free_ad;3422	}3423 3424	tasklet_setup(&adapter->neq_tasklet, ehea_neq_tasklet);3425 3426	ret = ehea_create_device_sysfs(dev);3427	if (ret)3428		goto out_kill_eq;3429 3430	ret = ehea_setup_ports(adapter);3431	if (ret) {3432		dev_err(&dev->dev, "setup_ports failed\n");3433		goto out_rem_dev_sysfs;3434	}3435 3436	ret = ibmebus_request_irq(adapter->neq->attr.ist1,3437				  ehea_interrupt_neq, 0,3438				  "ehea_neq", adapter);3439	if (ret) {3440		dev_err(&dev->dev, "requesting NEQ IRQ failed\n");3441		goto out_shutdown_ports;3442	}3443 3444	/* Handle any events that might be pending. */3445	tasklet_hi_schedule(&adapter->neq_tasklet);3446 3447	ret = 0;3448	goto out;3449 3450out_shutdown_ports:3451	for (i = 0; i < EHEA_MAX_PORTS; i++)3452		if (adapter->port[i]) {3453			ehea_shutdown_single_port(adapter->port[i]);3454			adapter->port[i] = NULL;3455		}3456 3457out_rem_dev_sysfs:3458	ehea_remove_device_sysfs(dev);3459 3460out_kill_eq:3461	ehea_destroy_eq(adapter->neq);3462 3463out_free_ad:3464	list_del(&adapter->list);3465 3466out:3467	ehea_update_firmware_handles();3468 3469	return ret;3470}3471 3472static void ehea_remove(struct platform_device *dev)3473{3474	struct ehea_adapter *adapter = platform_get_drvdata(dev);3475	int i;3476 3477	for (i = 0; i < EHEA_MAX_PORTS; i++)3478		if (adapter->port[i]) {3479			ehea_shutdown_single_port(adapter->port[i]);3480			adapter->port[i] = NULL;3481		}3482 3483	ehea_remove_device_sysfs(dev);3484 3485	ibmebus_free_irq(adapter->neq->attr.ist1, adapter);3486	tasklet_kill(&adapter->neq_tasklet);3487 3488	ehea_destroy_eq(adapter->neq);3489	ehea_remove_adapter_mr(adapter);3490	list_del(&adapter->list);3491 3492	ehea_update_firmware_handles();3493}3494 3495static int check_module_parm(void)3496{3497	int ret = 0;3498 3499	if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||3500	    (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {3501		pr_info("Bad parameter: rq1_entries\n");3502		ret = -EINVAL;3503	}3504	if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||3505	    (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {3506		pr_info("Bad parameter: rq2_entries\n");3507		ret = -EINVAL;3508	}3509	if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||3510	    (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {3511		pr_info("Bad parameter: rq3_entries\n");3512		ret = -EINVAL;3513	}3514	if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||3515	    (sq_entries > EHEA_MAX_ENTRIES_SQ)) {3516		pr_info("Bad parameter: sq_entries\n");3517		ret = -EINVAL;3518	}3519 3520	return ret;3521}3522 3523static ssize_t capabilities_show(struct device_driver *drv, char *buf)3524{3525	return sprintf(buf, "%d", EHEA_CAPABILITIES);3526}3527 3528static DRIVER_ATTR_RO(capabilities);3529 3530static int __init ehea_module_init(void)3531{3532	int ret;3533 3534	pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);3535 3536	memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));3537	memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));3538 3539	mutex_init(&ehea_fw_handles.lock);3540	spin_lock_init(&ehea_bcmc_regs.lock);3541 3542	ret = check_module_parm();3543	if (ret)3544		goto out;3545 3546	ret = ibmebus_register_driver(&ehea_driver);3547	if (ret) {3548		pr_err("failed registering eHEA device driver on ebus\n");3549		goto out;3550	}3551 3552	ret = driver_create_file(&ehea_driver.driver,3553				 &driver_attr_capabilities);3554	if (ret) {3555		pr_err("failed to register capabilities attribute, ret=%d\n",3556		       ret);3557		goto out2;3558	}3559 3560	return ret;3561 3562out2:3563	ibmebus_unregister_driver(&ehea_driver);3564out:3565	return ret;3566}3567 3568static void __exit ehea_module_exit(void)3569{3570	driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);3571	ibmebus_unregister_driver(&ehea_driver);3572	ehea_unregister_memory_hooks();3573	kfree(ehea_fw_handles.arr);3574	kfree(ehea_bcmc_regs.arr);3575	ehea_destroy_busmap();3576}3577 3578module_init(ehea_module_init);3579module_exit(ehea_module_exit);3580