Commit 975cd350 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 's390-qeth-updates' 



Julian Wiedmann says:

====================
s390/qeth: updates 2018-07-19

please apply one more round of qeth patches to net-next.
This brings additional performance improvements for the transmit code,
and some refactoring to pave the way for using netdev_priv.
Also, two minor fixes for rare corner cases.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents d528114b 5f89eca5

drivers/s390/net/qeth_core.h

+5 −6
Original line number Diff line number Diff line
@@ -104,6 +104,7 @@ struct qeth_dbf_info { 
struct qeth_perf_stats {

	unsigned int bufs_rec;

	unsigned int bufs_sent;

	unsigned int buf_elements_sent;



	unsigned int skbs_sent_pack;

	unsigned int bufs_sent_pack;
@@ -137,7 +138,6 @@ struct qeth_perf_stats { 
	unsigned int large_send_bytes;

	unsigned int large_send_cnt;

	unsigned int sg_skbs_sent;

	unsigned int sg_frags_sent;

	/* initial values when measuring starts */

	unsigned long initial_rx_packets;

	unsigned long initial_tx_packets;
@@ -658,11 +658,8 @@ struct qeth_card_info { 
	char mcl_level[QETH_MCL_LENGTH + 1];

	int guestlan;

	int mac_bits;

	int portno;

	enum qeth_card_types type;

	enum qeth_link_types link_type;

	int initial_mtu;

	int max_mtu;

	int broadcast_capable;

	int unique_id;

	bool layer_enforced;
@@ -966,6 +963,7 @@ extern struct qeth_card_list_struct qeth_core_card_list; 
extern struct kmem_cache *qeth_core_header_cache;

extern struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS];



struct net_device *qeth_clone_netdev(struct net_device *orig);

void qeth_set_recovery_task(struct qeth_card *);

void qeth_clear_recovery_task(struct qeth_card *);

void qeth_set_allowed_threads(struct qeth_card *, unsigned long , int);
@@ -995,7 +993,6 @@ void qeth_clear_cmd_buffers(struct qeth_channel *); 
void qeth_clear_qdio_buffers(struct qeth_card *);

void qeth_setadp_promisc_mode(struct qeth_card *);

struct net_device_stats *qeth_get_stats(struct net_device *);

int qeth_change_mtu(struct net_device *, int);

int qeth_setadpparms_change_macaddr(struct qeth_card *);

void qeth_tx_timeout(struct net_device *);

void qeth_prepare_control_data(struct qeth_card *, int,
@@ -1050,7 +1047,9 @@ netdev_features_t qeth_features_check(struct sk_buff *skb, 
				      struct net_device *dev,

				      netdev_features_t features);

int qeth_vm_request_mac(struct qeth_card *card);

int qeth_push_hdr(struct sk_buff *skb, struct qeth_hdr **hdr, unsigned int len);

int qeth_add_hw_header(struct qeth_card *card, struct sk_buff *skb,

		       struct qeth_hdr **hdr, unsigned int hdr_len,

		       unsigned int proto_len, unsigned int *elements);



/* exports for OSN */

int qeth_osn_assist(struct net_device *, void *, int);

drivers/s390/net/qeth_core_main.c

+183 −100
Original line number Diff line number Diff line
@@ -653,7 +653,6 @@ static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card, 
						cmd->hdr.return_code, card);

				}

				card->lan_online = 0;

				if (card->dev && netif_carrier_ok(card->dev))

				netif_carrier_off(card->dev);

				return NULL;

			case IPA_CMD_STARTLAN:
@@ -1921,7 +1920,7 @@ static int qeth_idx_activate_channel(struct qeth_channel *channel, 
		memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),

		       &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);

	}

	tmp = ((__u8)card->info.portno) | 0x80;

	tmp = ((u8)card->dev->dev_port) | 0x80;

	memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);

	memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),

	       &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
@@ -2279,19 +2278,42 @@ static int qeth_cm_setup(struct qeth_card *card) 


}



static int qeth_get_initial_mtu_for_card(struct qeth_card *card)

static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)

{

	switch (card->info.type) {

	case QETH_CARD_TYPE_IQD:

		return card->info.max_mtu;

	case QETH_CARD_TYPE_OSD:

	case QETH_CARD_TYPE_OSX:

		if (!card->options.layer2)

			return ETH_DATA_LEN - 8; /* L3: allow for LLC + SNAP */

		/* fall through */

	default:

		return ETH_DATA_LEN;

	struct net_device *dev = card->dev;

	unsigned int new_mtu;



	if (!max_mtu) {

		/* IQD needs accurate max MTU to set up its RX buffers: */

		if (IS_IQD(card))

			return -EINVAL;

		/* tolerate quirky HW: */

		max_mtu = ETH_MAX_MTU;

	}



	rtnl_lock();

	if (IS_IQD(card)) {

		/* move any device with default MTU to new max MTU: */

		new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;



		/* adjust RX buffer size to new max MTU: */

		card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;

		if (dev->max_mtu && dev->max_mtu != max_mtu)

			qeth_free_qdio_buffers(card);

	} else {

		if (dev->mtu)

			new_mtu = dev->mtu;

		/* default MTUs for first setup: */

		else if (card->options.layer2)

			new_mtu = ETH_DATA_LEN;

		else

			new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */

	}



	dev->max_mtu = max_mtu;

	dev->mtu = min(new_mtu, max_mtu);

	rtnl_unlock();

	return 0;

}



static int qeth_get_mtu_outof_framesize(int framesize)
@@ -2310,21 +2332,6 @@ static int qeth_get_mtu_outof_framesize(int framesize) 
	}

}



static int qeth_mtu_is_valid(struct qeth_card *card, int mtu)

{

	switch (card->info.type) {

	case QETH_CARD_TYPE_OSD:

	case QETH_CARD_TYPE_OSM:

	case QETH_CARD_TYPE_OSX:

	case QETH_CARD_TYPE_IQD:

		return ((mtu >= 576) &&

			(mtu <= card->info.max_mtu));

	case QETH_CARD_TYPE_OSN:

	default:

		return 1;

	}

}



static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,

		unsigned long data)

{
@@ -2343,29 +2350,10 @@ static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply, 
	if (card->info.type == QETH_CARD_TYPE_IQD) {

		memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);

		mtu = qeth_get_mtu_outof_framesize(framesize);

		if (!mtu) {

			iob->rc = -EINVAL;

			QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);

			return 0;

		}

		if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {

			/* frame size has changed */

			if (card->dev &&

			    ((card->dev->mtu == card->info.initial_mtu) ||

			     (card->dev->mtu > mtu)))

				card->dev->mtu = mtu;

			qeth_free_qdio_buffers(card);

		}

		card->info.initial_mtu = mtu;

		card->info.max_mtu = mtu;

		card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;

	} else {

		card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(

			iob->data);

		card->info.initial_mtu = min(card->info.max_mtu,

					qeth_get_initial_mtu_for_card(card));

		card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;

		mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);

	}

	*(u16 *)reply->param = mtu;



	memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);

	if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
@@ -2384,6 +2372,7 @@ static int qeth_ulp_enable(struct qeth_card *card) 
	int rc;

	char prot_type;

	struct qeth_cmd_buffer *iob;

	u16 max_mtu;



	/*FIXME: trace view callbacks*/

	QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
@@ -2391,8 +2380,7 @@ static int qeth_ulp_enable(struct qeth_card *card) 
	iob = qeth_wait_for_buffer(&card->write);

	memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);



	*(QETH_ULP_ENABLE_LINKNUM(iob->data)) =

		(__u8) card->info.portno;

	*(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;

	if (card->options.layer2)

		if (card->info.type == QETH_CARD_TYPE_OSN)

			prot_type = QETH_PROT_OSN2;
@@ -2407,9 +2395,10 @@ static int qeth_ulp_enable(struct qeth_card *card) 
	memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),

	       &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);

	rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,

				    qeth_ulp_enable_cb, NULL);

				    qeth_ulp_enable_cb, &max_mtu);

	if (rc)

		return rc;



	return qeth_update_max_mtu(card, max_mtu);

}



static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
@@ -2920,7 +2909,7 @@ static void qeth_fill_ipacmd_header(struct qeth_card *card, 
	cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;

	/* cmd->hdr.seqno is set by qeth_send_control_data() */

	cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);

	cmd->hdr.rel_adapter_no = (__u8) card->info.portno;

	cmd->hdr.rel_adapter_no = (u8) card->dev->dev_port;

	if (card->options.layer2)

		cmd->hdr.prim_version_no = 2;

	else
@@ -3506,13 +3495,14 @@ static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index, 
	qdio_flags = QDIO_FLAG_SYNC_OUTPUT;

	if (atomic_read(&queue->set_pci_flags_count))

		qdio_flags |= QDIO_FLAG_PCI_OUT;

	atomic_add(count, &queue->used_buffers);



	rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,

		     queue->queue_no, index, count);

	if (queue->card->options.performance_stats)

		queue->card->perf_stats.outbound_do_qdio_time +=

			qeth_get_micros() -

			queue->card->perf_stats.outbound_do_qdio_start_time;

	atomic_add(count, &queue->used_buffers);

	if (rc) {

		queue->card->stats.tx_errors += count;

		/* ignore temporary SIGA errors without busy condition */
@@ -3577,7 +3567,7 @@ static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue, 
{

	struct qeth_card *card = (struct qeth_card *)card_ptr;



	if (card->dev && (card->dev->flags & IFF_UP))

	if (card->dev->flags & IFF_UP)

		napi_schedule(&card->napi);

}
@@ -3841,6 +3831,17 @@ int qeth_get_elements_for_frags(struct sk_buff *skb) 
}

EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);



static unsigned int qeth_count_elements(struct sk_buff *skb, int data_offset)

{

	unsigned int elements = qeth_get_elements_for_frags(skb);

	addr_t end = (addr_t)skb->data + skb_headlen(skb);

	addr_t start = (addr_t)skb->data + data_offset;



	if (start != end)

		elements += qeth_get_elements_for_range(start, end);

	return elements;

}



/**

 * qeth_get_elements_no() -	find number of SBALEs for skb data, inc. frags.

 * @card:			qeth card structure, to check max. elems.
@@ -3856,12 +3857,7 @@ EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags); 
int qeth_get_elements_no(struct qeth_card *card,

		     struct sk_buff *skb, int extra_elems, int data_offset)

{

	addr_t end = (addr_t)skb->data + skb_headlen(skb);

	int elements = qeth_get_elements_for_frags(skb);

	addr_t start = (addr_t)skb->data + data_offset;



	if (start != end)

		elements += qeth_get_elements_for_range(start, end);

	int elements = qeth_count_elements(skb, data_offset);



	if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {

		QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
@@ -3895,32 +3891,87 @@ int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len) 
EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);



/**

 * qeth_push_hdr() - push a qeth_hdr onto an skb.

 * @skb: skb that the qeth_hdr should be pushed onto.

 * qeth_add_hw_header() - add a HW header to an skb.

 * @skb: skb that the HW header should be added to.

 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,

 *	 it contains a valid pointer to a qeth_hdr.

 * @len: length of the hdr that needs to be pushed on.

 * @hdr_len: length of the HW header.

 * @proto_len: length of protocol headers that need to be in same page as the

 *	       HW header.

 *

 * Returns the pushed length. If the header can't be pushed on

 * (eg. because it would cross a page boundary), it is allocated from

 * the cache instead and 0 is returned.

 * The number of needed buffer elements is returned in @elements.

 * Error to create the hdr is indicated by returning with < 0.

 */

int qeth_push_hdr(struct sk_buff *skb, struct qeth_hdr **hdr, unsigned int len)

{

	if (skb_headroom(skb) >= len &&

	    qeth_get_elements_for_range((addr_t)skb->data - len,

					(addr_t)skb->data) == 1) {

		*hdr = skb_push(skb, len);

		return len;

int qeth_add_hw_header(struct qeth_card *card, struct sk_buff *skb,

		       struct qeth_hdr **hdr, unsigned int hdr_len,

		       unsigned int proto_len, unsigned int *elements)

{

	const unsigned int max_elements = QETH_MAX_BUFFER_ELEMENTS(card);

	const unsigned int contiguous = proto_len ? proto_len : 1;

	unsigned int __elements;

	addr_t start, end;

	bool push_ok;

	int rc;



check_layout:

	start = (addr_t)skb->data - hdr_len;

	end = (addr_t)skb->data;



	if (qeth_get_elements_for_range(start, end + contiguous) == 1) {

		/* Push HW header into same page as first protocol header. */

		push_ok = true;

		__elements = qeth_count_elements(skb, 0);

	} else if (!proto_len && qeth_get_elements_for_range(start, end) == 1) {

		/* Push HW header into a new page. */

		push_ok = true;

		__elements = 1 + qeth_count_elements(skb, 0);

	} else {

		/* Use header cache, copy protocol headers up. */

		push_ok = false;

		__elements = 1 + qeth_count_elements(skb, proto_len);

	}



	/* Compress skb to fit into one IO buffer: */

	if (__elements > max_elements) {

		if (!skb_is_nonlinear(skb)) {

			/* Drop it, no easy way of shrinking it further. */

			QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",

					 max_elements, __elements, skb->len);

			return -E2BIG;

		}



		rc = skb_linearize(skb);

		if (card->options.performance_stats) {

			if (rc)

				card->perf_stats.tx_linfail++;

			else

				card->perf_stats.tx_lin++;

		}

		if (rc)

			return rc;



		/* Linearization changed the layout, re-evaluate: */

		goto check_layout;

	}



	*elements = __elements;

	/* Add the header: */

	if (push_ok) {

		*hdr = skb_push(skb, hdr_len);

		return hdr_len;

	}

	/* fall back */

	*hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);

	if (!*hdr)

		return -ENOMEM;

	/* Copy protocol headers behind HW header: */

	skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);

	return 0;

}

EXPORT_SYMBOL_GPL(qeth_push_hdr);

EXPORT_SYMBOL_GPL(qeth_add_hw_header);



static void __qeth_fill_buffer(struct sk_buff *skb,

			       struct qeth_qdio_out_buffer *buf,
@@ -4200,24 +4251,6 @@ void qeth_setadp_promisc_mode(struct qeth_card *card) 
}

EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);



int qeth_change_mtu(struct net_device *dev, int new_mtu)

{

	struct qeth_card *card;

	char dbf_text[15];



	card = dev->ml_priv;



	QETH_CARD_TEXT(card, 4, "chgmtu");

	sprintf(dbf_text, "%8x", new_mtu);

	QETH_CARD_TEXT(card, 4, dbf_text);



	if (!qeth_mtu_is_valid(card, new_mtu))

		return -EINVAL;

	dev->mtu = new_mtu;

	return 0;

}

EXPORT_SYMBOL_GPL(qeth_change_mtu);



struct net_device_stats *qeth_get_stats(struct net_device *dev)

{

	struct qeth_card *card;
@@ -4793,9 +4826,6 @@ int qeth_vm_request_mac(struct qeth_card *card) 


	QETH_DBF_TEXT(SETUP, 2, "vmreqmac");



	if (!card->dev)

		return -ENODEV;



	request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);

	response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);

	if (!request || !response) {
@@ -5675,6 +5705,53 @@ static void qeth_clear_dbf_list(void) 
	mutex_unlock(&qeth_dbf_list_mutex);

}



static struct net_device *qeth_alloc_netdev(struct qeth_card *card)

{

	struct net_device *dev;



	switch (card->info.type) {

	case QETH_CARD_TYPE_IQD:

		dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN, ether_setup);

		break;

	case QETH_CARD_TYPE_OSN:

		dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);

		break;

	default:

		dev = alloc_etherdev(0);

	}



	if (!dev)

		return NULL;



	dev->ml_priv = card;

	dev->watchdog_timeo = QETH_TX_TIMEOUT;

	dev->min_mtu = IS_OSN(card) ? 64 : 576;

	 /* initialized when device first goes online: */

	dev->max_mtu = 0;

	dev->mtu = 0;

	SET_NETDEV_DEV(dev, &card->gdev->dev);

	netif_carrier_off(dev);



	if (!IS_OSN(card)) {

		dev->priv_flags &= ~IFF_TX_SKB_SHARING;

		dev->hw_features |= NETIF_F_SG;

		dev->vlan_features |= NETIF_F_SG;

	}



	return dev;

}



struct net_device *qeth_clone_netdev(struct net_device *orig)

{

	struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);



	if (!clone)

		return NULL;



	clone->dev_port = orig->dev_port;

	return clone;

}



static int qeth_core_probe_device(struct ccwgroup_device *gdev)

{

	struct qeth_card *card;
@@ -5724,6 +5801,10 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev) 
		goto err_card;

	}



	card->dev = qeth_alloc_netdev(card);

	if (!card->dev)

		goto err_card;



	qeth_determine_capabilities(card);

	enforced_disc = qeth_enforce_discipline(card);

	switch (enforced_disc) {
@@ -5734,7 +5815,7 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev) 
		card->info.layer_enforced = true;

		rc = qeth_core_load_discipline(card, enforced_disc);

		if (rc)

			goto err_card;

			goto err_load;



		gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)

					? card->discipline->devtype
@@ -5752,6 +5833,8 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev) 


err_disc:

	qeth_core_free_discipline(card);

err_load:

	free_netdev(card->dev);

err_card:

	qeth_core_free_card(card);

err_dev:
@@ -5774,10 +5857,10 @@ static void qeth_core_remove_device(struct ccwgroup_device *gdev) 
	write_lock_irqsave(&qeth_core_card_list.rwlock, flags);

	list_del(&card->list);

	write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);

	free_netdev(card->dev);

	qeth_core_free_card(card);

	dev_set_drvdata(&gdev->dev, NULL);

	put_device(&gdev->dev);

	return;

}



static int qeth_core_set_online(struct ccwgroup_device *gdev)
@@ -5955,7 +6038,7 @@ static struct { 
	{"tx skbs packing"},

	{"tx buffers packing"},

	{"tx sg skbs"},

	{"tx sg frags"},

	{"tx buffer elements"},

/* 10 */{"rx sg skbs"},

	{"rx sg frags"},

	{"rx sg page allocs"},
@@ -6014,7 +6097,7 @@ void qeth_core_get_ethtool_stats(struct net_device *dev, 
	data[6] = card->perf_stats.skbs_sent_pack;

	data[7] = card->perf_stats.bufs_sent_pack;

	data[8] = card->perf_stats.sg_skbs_sent;

	data[9] = card->perf_stats.sg_frags_sent;

	data[9] = card->perf_stats.buf_elements_sent;

	data[10] = card->perf_stats.sg_skbs_rx;

	data[11] = card->perf_stats.sg_frags_rx;

	data[12] = card->perf_stats.sg_alloc_page_rx;

drivers/s390/net/qeth_core_mpc.h

+1 −0
Original line number Diff line number Diff line
@@ -65,6 +65,7 @@ enum qeth_card_types { 
};



#define IS_IQD(card)	((card)->info.type == QETH_CARD_TYPE_IQD)

#define IS_OSN(card)	((card)->info.type == QETH_CARD_TYPE_OSN)



#define QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE 0x18

/* only the first two bytes are looked at in qeth_get_cardname_short */

drivers/s390/net/qeth_core_sys.c

+14 −4
Original line number Diff line number Diff line
@@ -112,7 +112,7 @@ static ssize_t qeth_dev_portno_show(struct device *dev, 
	if (!card)

		return -EINVAL;



	return sprintf(buf, "%i\n", card->info.portno);

	return sprintf(buf, "%i\n", card->dev->dev_port);

}



static ssize_t qeth_dev_portno_store(struct device *dev,
@@ -143,8 +143,6 @@ static ssize_t qeth_dev_portno_store(struct device *dev, 
		rc = -EINVAL;

		goto out;

	}

	card->info.portno = portno;

	if (card->dev)

	card->dev->dev_port = portno;

out:

	mutex_unlock(&card->conf_mutex);
@@ -388,6 +386,7 @@ static ssize_t qeth_dev_layer2_store(struct device *dev, 
		struct device_attribute *attr, const char *buf, size_t count)

{

	struct qeth_card *card = dev_get_drvdata(dev);

	struct net_device *ndev;

	char *tmp;

	int i, rc = 0;

	enum qeth_discipline_id newdis;
@@ -424,8 +423,19 @@ static ssize_t qeth_dev_layer2_store(struct device *dev, 


	card->info.mac_bits = 0;

	if (card->discipline) {

		/* start with a new, pristine netdevice: */

		ndev = qeth_clone_netdev(card->dev);

		if (!ndev) {

			rc = -ENOMEM;

			goto out;

		}



		card->discipline->remove(card->gdev);

		qeth_core_free_discipline(card);

		card->options.layer2 = -1;



		free_netdev(card->dev);

		card->dev = ndev;

	}



	rc = qeth_core_load_discipline(card, newdis);

drivers/s390/net/qeth_l2_main.c

+48 −128
Original line number Diff line number Diff line
@@ -641,97 +641,58 @@ static void qeth_l2_set_rx_mode(struct net_device *dev) 
		qeth_promisc_to_bridge(card);

}



static int qeth_l2_xmit_iqd(struct qeth_card *card, struct sk_buff *skb,

			    struct qeth_qdio_out_q *queue, int cast_type)

static int qeth_l2_xmit(struct qeth_card *card, struct sk_buff *skb,

			struct qeth_qdio_out_q *queue, int cast_type, int ipv)

{

	unsigned int data_offset = ETH_HLEN;

	struct qeth_hdr *hdr;

	int rc;



	hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);

	if (!hdr)

		return -ENOMEM;

	qeth_l2_fill_header(hdr, skb, cast_type, skb->len);

	skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr),

				  data_offset);



	if (!qeth_get_elements_no(card, skb, 1, data_offset)) {

		rc = -E2BIG;

		goto out;

	}

	rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,

				      sizeof(*hdr) + data_offset);

out:

	if (rc)

		kmem_cache_free(qeth_core_header_cache, hdr);

	return rc;

}



static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb,

			    struct qeth_qdio_out_q *queue, int cast_type,

			    int ipv)

{

	int push_len = sizeof(struct qeth_hdr);

	unsigned int elements, nr_frags;

	unsigned int hdr_elements = 0;

	const unsigned int proto_len = IS_IQD(card) ? ETH_HLEN : 0;

	const unsigned int hw_hdr_len = sizeof(struct qeth_hdr);

	unsigned int frame_len = skb->len;

	unsigned int data_offset = 0;

	struct qeth_hdr *hdr = NULL;

	unsigned int hd_len = 0;

	int rc;



	/* fix hardware limitation: as long as we do not have sbal

	 * chaining we can not send long frag lists

	 */

	if (!qeth_get_elements_no(card, skb, 0, 0)) {

		rc = skb_linearize(skb);

	unsigned int elements;

	int push_len, rc;

	bool is_sg;



		if (card->options.performance_stats) {

			if (rc)

				card->perf_stats.tx_linfail++;

			else

				card->perf_stats.tx_lin++;

		}

	rc = skb_cow_head(skb, hw_hdr_len);

	if (rc)

		return rc;

	}

	nr_frags = skb_shinfo(skb)->nr_frags;



	rc = skb_cow_head(skb, push_len);

	if (rc)

		return rc;

	push_len = qeth_push_hdr(skb, &hdr, push_len);

	push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len,

				      &elements);

	if (push_len < 0)

		return push_len;

	if (!push_len) {

		/* hdr was allocated from cache */

		hd_len = sizeof(*hdr);

		hdr_elements = 1;

		/* HW header needs its own buffer element. */

		hd_len = hw_hdr_len + proto_len;

		data_offset = proto_len;

	}

	qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len);

	qeth_l2_fill_header(hdr, skb, cast_type, frame_len);

	if (skb->ip_summed == CHECKSUM_PARTIAL) {

		qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);

		if (card->options.performance_stats)

			card->perf_stats.tx_csum++;

	}



	elements = qeth_get_elements_no(card, skb, hdr_elements, 0);

	if (!elements) {

		rc = -E2BIG;

		goto out;

	is_sg = skb_is_nonlinear(skb);

	if (IS_IQD(card)) {

		rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,

					      hd_len);

	} else {

		/* TODO: drop skb_orphan() once TX completion is fast enough */

		skb_orphan(skb);

		rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,

					 hd_len, elements);

	}

	elements += hdr_elements;



	/* TODO: remove the skb_orphan() once TX completion is fast enough */

	skb_orphan(skb);

	rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements);

out:

	if (!rc) {

		if (card->options.performance_stats && nr_frags) {

		if (card->options.performance_stats) {

			card->perf_stats.buf_elements_sent += elements;

			if (is_sg)

				card->perf_stats.sg_skbs_sent++;

			/* nr_frags + skb->data */

			card->perf_stats.sg_frags_sent += nr_frags + 1;

		}

	} else {

		if (hd_len)

		if (!push_len)

			kmem_cache_free(qeth_core_header_cache, hdr);

		if (rc == -EBUSY)

			/* roll back to ETH header */
@@ -781,16 +742,10 @@ static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb, 
	}

	netif_stop_queue(dev);



	switch (card->info.type) {

	case QETH_CARD_TYPE_OSN:

	if (IS_OSN(card))

		rc = qeth_l2_xmit_osn(card, skb, queue);

		break;

	case QETH_CARD_TYPE_IQD:

		rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type);

		break;

	default:

		rc = qeth_l2_xmit_osa(card, skb, queue, cast_type, ipv);

	}

	else

		rc = qeth_l2_xmit(card, skb, queue, cast_type, ipv);



	if (!rc) {

		card->stats.tx_packets++;
@@ -899,13 +854,7 @@ static void qeth_l2_remove_device(struct ccwgroup_device *cgdev) 


	if (cgdev->state == CCWGROUP_ONLINE)

		qeth_l2_set_offline(cgdev);



	if (card->dev) {

	unregister_netdev(card->dev);

		free_netdev(card->dev);

		card->dev = NULL;

	}

	return;

}



static const struct ethtool_ops qeth_l2_ethtool_ops = {
@@ -934,7 +883,6 @@ static const struct net_device_ops qeth_l2_netdev_ops = { 
	.ndo_set_rx_mode	= qeth_l2_set_rx_mode,

	.ndo_do_ioctl		= qeth_do_ioctl,

	.ndo_set_mac_address    = qeth_l2_set_mac_address,

	.ndo_change_mtu	   	= qeth_change_mtu,

	.ndo_vlan_rx_add_vid	= qeth_l2_vlan_rx_add_vid,

	.ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,

	.ndo_tx_timeout	   	= qeth_tx_timeout,
@@ -944,35 +892,19 @@ static const struct net_device_ops qeth_l2_netdev_ops = { 


static int qeth_l2_setup_netdev(struct qeth_card *card)

{

	switch (card->info.type) {

	case QETH_CARD_TYPE_IQD:

		card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,

					 ether_setup);

		break;

	case QETH_CARD_TYPE_OSN:

		card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,

					 ether_setup);

		break;

	default:

		card->dev = alloc_etherdev(0);

	}

	int rc;



	if (!card->dev)

		return -ENODEV;

	if (card->dev->netdev_ops)

		return 0;



	card->dev->ml_priv = card;

	card->dev->priv_flags |= IFF_UNICAST_FLT;

	card->dev->watchdog_timeo = QETH_TX_TIMEOUT;

	card->dev->mtu = card->info.initial_mtu;

	card->dev->min_mtu = 64;

	card->dev->max_mtu = ETH_MAX_MTU;

	card->dev->dev_port = card->info.portno;

	card->dev->netdev_ops = &qeth_l2_netdev_ops;

	if (card->info.type == QETH_CARD_TYPE_OSN) {

		card->dev->ethtool_ops = &qeth_l2_osn_ops;

		card->dev->flags |= IFF_NOARP;

	} else {

		card->dev->ethtool_ops = &qeth_l2_ethtool_ops;

		card->dev->needed_headroom = sizeof(struct qeth_hdr);

	}



	if (card->info.type == QETH_CARD_TYPE_OSM)
@@ -980,14 +912,6 @@ static int qeth_l2_setup_netdev(struct qeth_card *card) 
	else

		card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;



	if (card->info.type != QETH_CARD_TYPE_OSN &&

	    card->info.type != QETH_CARD_TYPE_IQD) {

		card->dev->priv_flags &= ~IFF_TX_SKB_SHARING;

		card->dev->needed_headroom = sizeof(struct qeth_hdr);

		card->dev->hw_features |= NETIF_F_SG;

		card->dev->vlan_features |= NETIF_F_SG;

	}



	if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {

		card->dev->features |= NETIF_F_SG;

		/* OSA 3S and earlier has no RX/TX support */
@@ -1006,12 +930,12 @@ static int qeth_l2_setup_netdev(struct qeth_card *card) 
		card->dev->vlan_features |= NETIF_F_RXCSUM;

	}



	card->info.broadcast_capable = 1;

	qeth_l2_request_initial_mac(card);

	SET_NETDEV_DEV(card->dev, &card->gdev->dev);

	netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);

	netif_carrier_off(card->dev);

	return register_netdev(card->dev);

	rc = register_netdev(card->dev);

	if (rc)

		card->dev->netdev_ops = NULL;

	return rc;

}



static int qeth_l2_start_ipassists(struct qeth_card *card)
@@ -1057,10 +981,9 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode) 
		dev_info(&card->gdev->dev,

		"The device represents a Bridge Capable Port\n");



	if (!card->dev && qeth_l2_setup_netdev(card)) {

		rc = -ENODEV;

	rc = qeth_l2_setup_netdev(card);

	if (rc)

		goto out_remove;

	}



	if (card->info.type != QETH_CARD_TYPE_OSN &&

	    !qeth_l2_send_setmac(card, card->dev->dev_addr))
@@ -1163,7 +1086,6 @@ static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev, 
	QETH_DBF_TEXT(SETUP, 3, "setoffl");

	QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));



	if (card->dev && netif_carrier_ok(card->dev))

	netif_carrier_off(card->dev);

	recover_flag = card->state;

	if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
@@ -1237,7 +1159,6 @@ static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev) 
{

	struct qeth_card *card = dev_get_drvdata(&gdev->dev);



	if (card->dev)

	netif_device_detach(card->dev);

	qeth_set_allowed_threads(card, 0, 1);

	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
@@ -1271,7 +1192,6 @@ static int qeth_l2_pm_resume(struct ccwgroup_device *gdev) 
		rc = __qeth_l2_set_online(card->gdev, 0);

out:

	qeth_set_allowed_threads(card, 0xffffffff, 0);

	if (card->dev)

	netif_device_attach(card->dev);

	if (rc)

		dev_warn(&card->gdev->dev, "The qeth device driver "

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