[patch 0/5] s390: qeth patches for 2.6.33

[patch 0/5] s390: qeth patches for 2.6.33

[frank.blaschka]

Hi Dave,

here is a set of qeth patches for 2.6.33 (net-next).

shortlog:
Einar Lueck (1)
qeth: Exploit Connection Isolation

Ursula Braun (2)
qeth: remaining EDDP cleanup
qeth: Recognize return codes of ccw_device_set_online

Frank Blaschka (2)
qeth: rework TSO functions
qeth: allow dynamic change of rx checksumming

Thanks,
        Frank

[patch 1/5] [PATCH] qeth: Exploit Connection Isolation

[frank.blaschka]

[-- Attachment #1: 604-qeth-isolation.diff --]
[-- Type: text/plain, Size: 14176 bytes --]

From: Einar Lueck <elelueck@de.ibm.com>

Isolate data connection to a shared OSA card against other data
connections to the same OSA card. Connectivity between isolated
data connections sharing the same OSA card is therefore possible only
through external network gear (e.g. a router).

Signed-off-by: Einar Lueck <elelueck@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
---

 drivers/s390/net/qeth_core.h      |    2 
 drivers/s390/net/qeth_core_main.c |  151 ++++++++++++++++++++++++++++++++++++++
 drivers/s390/net/qeth_core_mpc.h  |   45 ++++++++---
 drivers/s390/net/qeth_core_sys.c  |   77 +++++++++++++++++++
 drivers/s390/net/qeth_l2_main.c   |    2 
 drivers/s390/net/qeth_l3_main.c   |    2 
 6 files changed, 267 insertions(+), 12 deletions(-)

diff -urpN linux-2.6/drivers/s390/net/qeth_core.h linux-2.6-patched/drivers/s390/net/qeth_core.h
--- linux-2.6/drivers/s390/net/qeth_core.h	2009-11-10 17:02:43.000000000 +0100
+++ linux-2.6-patched/drivers/s390/net/qeth_core.h	2009-11-10 17:03:17.000000000 +0100
@@ -648,6 +648,7 @@ struct qeth_card_options {
 	enum qeth_large_send_types large_send;
 	int performance_stats;
 	int rx_sg_cb;
+	enum qeth_ipa_isolation_modes isolation;
 };
 
 /*
@@ -856,6 +857,7 @@ void qeth_core_get_strings(struct net_de
 void qeth_core_get_drvinfo(struct net_device *, struct ethtool_drvinfo *);
 void qeth_dbf_longtext(enum qeth_dbf_names dbf_nix, int level, char *text, ...);
 int qeth_core_ethtool_get_settings(struct net_device *, struct ethtool_cmd *);
+int qeth_set_access_ctrl_online(struct qeth_card *card);
 
 /* exports for OSN */
 int qeth_osn_assist(struct net_device *, void *, int);
diff -urpN linux-2.6/drivers/s390/net/qeth_core_main.c linux-2.6-patched/drivers/s390/net/qeth_core_main.c
--- linux-2.6/drivers/s390/net/qeth_core_main.c	2009-11-10 17:02:43.000000000 +0100
+++ linux-2.6-patched/drivers/s390/net/qeth_core_main.c	2009-11-10 17:03:17.000000000 +0100
@@ -1079,6 +1079,7 @@ static void qeth_set_intial_options(stru
 	card->options.add_hhlen = DEFAULT_ADD_HHLEN;
 	card->options.performance_stats = 0;
 	card->options.rx_sg_cb = QETH_RX_SG_CB;
+	card->options.isolation = ISOLATION_MODE_NONE;
 }
 
 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
@@ -3389,6 +3390,156 @@ int qeth_setadpparms_change_macaddr(stru
 }
 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
 
+static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
+		struct qeth_reply *reply, unsigned long data)
+{
+	struct qeth_ipa_cmd *cmd;
+	struct qeth_set_access_ctrl *access_ctrl_req;
+	int rc;
+
+	QETH_DBF_TEXT(TRACE, 4, "setaccb");
+
+	cmd = (struct qeth_ipa_cmd *) data;
+	access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
+	QETH_DBF_TEXT_(SETUP, 2, "setaccb");
+	QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
+	QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
+		cmd->data.setadapterparms.hdr.return_code);
+	switch (cmd->data.setadapterparms.hdr.return_code) {
+	case SET_ACCESS_CTRL_RC_SUCCESS:
+	case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
+	case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
+	{
+		card->options.isolation = access_ctrl_req->subcmd_code;
+		if (card->options.isolation == ISOLATION_MODE_NONE) {
+			dev_info(&card->gdev->dev,
+			    "QDIO data connection isolation is deactivated\n");
+		} else {
+			dev_info(&card->gdev->dev,
+			    "QDIO data connection isolation is activated\n");
+		}
+		QETH_DBF_MESSAGE(3, "OK:SET_ACCESS_CTRL(%s, %d)==%d\n",
+			card->gdev->dev.kobj.name,
+			access_ctrl_req->subcmd_code,
+			cmd->data.setadapterparms.hdr.return_code);
+		rc = 0;
+		break;
+	}
+	case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
+	{
+		QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
+			card->gdev->dev.kobj.name,
+			access_ctrl_req->subcmd_code,
+			cmd->data.setadapterparms.hdr.return_code);
+		dev_err(&card->gdev->dev, "Adapter does not "
+			"support QDIO data connection isolation\n");
+
+		/* ensure isolation mode is "none" */
+		card->options.isolation = ISOLATION_MODE_NONE;
+		rc = -EOPNOTSUPP;
+		break;
+	}
+	case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
+	{
+		QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_MODE(%s,%d)==%d\n",
+			card->gdev->dev.kobj.name,
+			access_ctrl_req->subcmd_code,
+			cmd->data.setadapterparms.hdr.return_code);
+		dev_err(&card->gdev->dev,
+			"Adapter is dedicated. "
+			"QDIO data connection isolation not supported\n");
+
+		/* ensure isolation mode is "none" */
+		card->options.isolation = ISOLATION_MODE_NONE;
+		rc = -EOPNOTSUPP;
+		break;
+	}
+	case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
+	{
+		QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_MODE(%s,%d)==%d\n",
+			card->gdev->dev.kobj.name,
+			access_ctrl_req->subcmd_code,
+			cmd->data.setadapterparms.hdr.return_code);
+		dev_err(&card->gdev->dev,
+			"TSO does not permit QDIO data connection isolation\n");
+
+		/* ensure isolation mode is "none" */
+		card->options.isolation = ISOLATION_MODE_NONE;
+		rc = -EPERM;
+		break;
+	}
+	default:
+	{
+		/* this should never happen */
+		QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_MODE(%s,%d)==%d"
+			"==UNKNOWN\n",
+			card->gdev->dev.kobj.name,
+			access_ctrl_req->subcmd_code,
+			cmd->data.setadapterparms.hdr.return_code);
+
+		/* ensure isolation mode is "none" */
+		card->options.isolation = ISOLATION_MODE_NONE;
+		rc = 0;
+		break;
+	}
+	}
+	qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
+	return rc;
+}
+
+static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
+		enum qeth_ipa_isolation_modes isolation)
+{
+	int rc;
+	struct qeth_cmd_buffer *iob;
+	struct qeth_ipa_cmd *cmd;
+	struct qeth_set_access_ctrl *access_ctrl_req;
+
+	QETH_DBF_TEXT(TRACE, 4, "setacctl");
+
+	QETH_DBF_TEXT_(SETUP, 2, "setacctl");
+	QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
+
+	iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
+				   sizeof(struct qeth_ipacmd_setadpparms_hdr) +
+				   sizeof(struct qeth_set_access_ctrl));
+	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
+	access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
+	access_ctrl_req->subcmd_code = isolation;
+
+	rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
+			       NULL);
+	QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
+	return rc;
+}
+
+int qeth_set_access_ctrl_online(struct qeth_card *card)
+{
+	int rc = 0;
+
+	QETH_DBF_TEXT(TRACE, 4, "setactlo");
+
+	if (card->info.type == QETH_CARD_TYPE_OSAE &&
+	    qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
+		rc = qeth_setadpparms_set_access_ctrl(card,
+			card->options.isolation);
+		if (rc) {
+			QETH_DBF_MESSAGE(3,
+				"IPA(SET_ACCESS_CTRL,%s,%d) sent failed",
+				card->gdev->dev.kobj.name,
+				rc);
+		}
+	} else if (card->options.isolation != ISOLATION_MODE_NONE) {
+		card->options.isolation = ISOLATION_MODE_NONE;
+
+		dev_err(&card->gdev->dev, "Adapter does not "
+			"support QDIO data connection isolation\n");
+		rc = -EOPNOTSUPP;
+	}
+	return rc;
+}
+EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
+
 void qeth_tx_timeout(struct net_device *dev)
 {
 	struct qeth_card *card;
diff -urpN linux-2.6/drivers/s390/net/qeth_core_mpc.h linux-2.6-patched/drivers/s390/net/qeth_core_mpc.h
--- linux-2.6/drivers/s390/net/qeth_core_mpc.h	2009-09-10 00:13:59.000000000 +0200
+++ linux-2.6-patched/drivers/s390/net/qeth_core_mpc.h	2009-11-10 17:03:17.000000000 +0100
@@ -234,18 +234,19 @@ enum qeth_ipa_setdelip_flags {
 
 /* SETADAPTER IPA Command: ****************************************************/
 enum qeth_ipa_setadp_cmd {
-	IPA_SETADP_QUERY_COMMANDS_SUPPORTED	= 0x0001,
-	IPA_SETADP_ALTER_MAC_ADDRESS		= 0x0002,
-	IPA_SETADP_ADD_DELETE_GROUP_ADDRESS	= 0x0004,
-	IPA_SETADP_ADD_DELETE_FUNCTIONAL_ADDR	= 0x0008,
-	IPA_SETADP_SET_ADDRESSING_MODE		= 0x0010,
-	IPA_SETADP_SET_CONFIG_PARMS		= 0x0020,
-	IPA_SETADP_SET_CONFIG_PARMS_EXTENDED	= 0x0040,
-	IPA_SETADP_SET_BROADCAST_MODE		= 0x0080,
-	IPA_SETADP_SEND_OSA_MESSAGE		= 0x0100,
-	IPA_SETADP_SET_SNMP_CONTROL		= 0x0200,
-	IPA_SETADP_QUERY_CARD_INFO		= 0x0400,
-	IPA_SETADP_SET_PROMISC_MODE		= 0x0800,
+	IPA_SETADP_QUERY_COMMANDS_SUPPORTED	= 0x00000001L,
+	IPA_SETADP_ALTER_MAC_ADDRESS		= 0x00000002L,
+	IPA_SETADP_ADD_DELETE_GROUP_ADDRESS	= 0x00000004L,
+	IPA_SETADP_ADD_DELETE_FUNCTIONAL_ADDR	= 0x00000008L,
+	IPA_SETADP_SET_ADDRESSING_MODE		= 0x00000010L,
+	IPA_SETADP_SET_CONFIG_PARMS		= 0x00000020L,
+	IPA_SETADP_SET_CONFIG_PARMS_EXTENDED	= 0x00000040L,
+	IPA_SETADP_SET_BROADCAST_MODE		= 0x00000080L,
+	IPA_SETADP_SEND_OSA_MESSAGE		= 0x00000100L,
+	IPA_SETADP_SET_SNMP_CONTROL		= 0x00000200L,
+	IPA_SETADP_QUERY_CARD_INFO		= 0x00000400L,
+	IPA_SETADP_SET_PROMISC_MODE		= 0x00000800L,
+	IPA_SETADP_SET_ACCESS_CONTROL		= 0x00010000L,
 };
 enum qeth_ipa_mac_ops {
 	CHANGE_ADDR_READ_MAC		= 0,
@@ -264,6 +265,20 @@ enum qeth_ipa_promisc_modes {
 	SET_PROMISC_MODE_OFF		= 0,
 	SET_PROMISC_MODE_ON		= 1,
 };
+enum qeth_ipa_isolation_modes {
+	ISOLATION_MODE_NONE		= 0x00000000L,
+	ISOLATION_MODE_FWD		= 0x00000001L,
+	ISOLATION_MODE_DROP		= 0x00000002L,
+};
+enum qeth_ipa_set_access_mode_rc {
+	SET_ACCESS_CTRL_RC_SUCCESS		= 0x0000,
+	SET_ACCESS_CTRL_RC_NOT_SUPPORTED	= 0x0004,
+	SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED	= 0x0008,
+	SET_ACCESS_CTRL_RC_ALREADY_ISOLATED	= 0x0010,
+	SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER	= 0x0014,
+	SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF	= 0x0018,
+};
+
 
 /* (SET)DELIP(M) IPA stuff ***************************************************/
 struct qeth_ipacmd_setdelip4 {
@@ -376,6 +391,11 @@ struct qeth_snmp_ureq {
 	struct qeth_snmp_cmd cmd;
 } __attribute__((packed));
 
+/* SET_ACCESS_CONTROL: same format for request and reply */
+struct qeth_set_access_ctrl {
+	__u32 subcmd_code;
+} __attribute__((packed));
+
 struct qeth_ipacmd_setadpparms_hdr {
 	__u32 supp_hw_cmds;
 	__u32 reserved1;
@@ -394,6 +414,7 @@ struct qeth_ipacmd_setadpparms {
 		struct qeth_query_cmds_supp query_cmds_supp;
 		struct qeth_change_addr change_addr;
 		struct qeth_snmp_cmd snmp;
+		struct qeth_set_access_ctrl set_access_ctrl;
 		__u32 mode;
 	} data;
 } __attribute__ ((packed));
diff -urpN linux-2.6/drivers/s390/net/qeth_core_sys.c linux-2.6-patched/drivers/s390/net/qeth_core_sys.c
--- linux-2.6/drivers/s390/net/qeth_core_sys.c	2009-11-10 17:02:43.000000000 +0100
+++ linux-2.6-patched/drivers/s390/net/qeth_core_sys.c	2009-11-10 17:03:17.000000000 +0100
@@ -463,6 +463,82 @@ static ssize_t qeth_dev_large_send_store
 static DEVICE_ATTR(large_send, 0644, qeth_dev_large_send_show,
 		   qeth_dev_large_send_store);
 
+#define ATTR_QETH_ISOLATION_NONE	("none")
+#define ATTR_QETH_ISOLATION_FWD		("forward")
+#define ATTR_QETH_ISOLATION_DROP	("drop")
+
+static ssize_t qeth_dev_isolation_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct qeth_card *card = dev_get_drvdata(dev);
+
+	if (!card)
+		return -EINVAL;
+
+	switch (card->options.isolation) {
+	case ISOLATION_MODE_NONE:
+		return snprintf(buf, 6, "%s\n", ATTR_QETH_ISOLATION_NONE);
+	case ISOLATION_MODE_FWD:
+		return snprintf(buf, 9, "%s\n", ATTR_QETH_ISOLATION_FWD);
+	case ISOLATION_MODE_DROP:
+		return snprintf(buf, 6, "%s\n", ATTR_QETH_ISOLATION_DROP);
+	default:
+		return snprintf(buf, 5, "%s\n", "N/A");
+	}
+}
+
+static ssize_t qeth_dev_isolation_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct qeth_card *card = dev_get_drvdata(dev);
+	enum qeth_ipa_isolation_modes isolation;
+	int rc = 0;
+	char *tmp, *curtoken;
+	curtoken = (char *) buf;
+
+	if (!card) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	/* check for unknown, too, in case we do not yet know who we are */
+	if (card->info.type != QETH_CARD_TYPE_OSAE &&
+	    card->info.type != QETH_CARD_TYPE_UNKNOWN) {
+		rc = -EOPNOTSUPP;
+		dev_err(&card->gdev->dev, "Adapter does not "
+			"support QDIO data connection isolation\n");
+		goto out;
+	}
+
+	/* parse input into isolation mode */
+	tmp = strsep(&curtoken, "\n");
+	if (!strcmp(tmp, ATTR_QETH_ISOLATION_NONE)) {
+		isolation = ISOLATION_MODE_NONE;
+	} else if (!strcmp(tmp, ATTR_QETH_ISOLATION_FWD)) {
+		isolation = ISOLATION_MODE_FWD;
+	} else if (!strcmp(tmp, ATTR_QETH_ISOLATION_DROP)) {
+		isolation = ISOLATION_MODE_DROP;
+	} else {
+		rc = -EINVAL;
+		goto out;
+	}
+	rc = count;
+
+	/* defer IP assist if device is offline (until discipline->set_online)*/
+	card->options.isolation = isolation;
+	if (card->state == CARD_STATE_SOFTSETUP ||
+	    card->state == CARD_STATE_UP) {
+		int ipa_rc = qeth_set_access_ctrl_online(card);
+		if (ipa_rc != 0)
+			rc = ipa_rc;
+	}
+out:
+	return rc;
+}
+
+static DEVICE_ATTR(isolation, 0644, qeth_dev_isolation_show,
+		   qeth_dev_isolation_store);
+
 static ssize_t qeth_dev_blkt_show(char *buf, struct qeth_card *card, int value)
 {
 
@@ -583,6 +659,7 @@ static struct attribute *qeth_device_att
 	&dev_attr_performance_stats.attr,
 	&dev_attr_layer2.attr,
 	&dev_attr_large_send.attr,
+	&dev_attr_isolation.attr,
 	NULL,
 };
 
diff -urpN linux-2.6/drivers/s390/net/qeth_l2_main.c linux-2.6-patched/drivers/s390/net/qeth_l2_main.c
--- linux-2.6/drivers/s390/net/qeth_l2_main.c	2009-11-10 17:02:43.000000000 +0100
+++ linux-2.6-patched/drivers/s390/net/qeth_l2_main.c	2009-11-10 17:03:17.000000000 +0100
@@ -988,6 +988,8 @@ static int __qeth_l2_set_online(struct c
 		card->lan_online = 1;
 
 	if (card->info.type != QETH_CARD_TYPE_OSN) {
+		/* configure isolation level */
+		qeth_set_access_ctrl_online(card);
 		qeth_set_large_send(card, card->options.large_send);
 		qeth_l2_process_vlans(card, 0);
 	}
diff -urpN linux-2.6/drivers/s390/net/qeth_l3_main.c linux-2.6-patched/drivers/s390/net/qeth_l3_main.c
--- linux-2.6/drivers/s390/net/qeth_l3_main.c	2009-11-10 17:02:43.000000000 +0100
+++ linux-2.6-patched/drivers/s390/net/qeth_l3_main.c	2009-11-10 17:03:17.000000000 +0100
@@ -1506,6 +1506,8 @@ static int qeth_l3_start_ipa_tso(struct 
 static int qeth_l3_start_ipassists(struct qeth_card *card)
 {
 	QETH_DBF_TEXT(TRACE, 3, "strtipas");
+
+	qeth_set_access_ctrl_online(card);	/* go on*/
 	qeth_l3_start_ipa_arp_processing(card);	/* go on*/
 	qeth_l3_start_ipa_ip_fragmentation(card);	/* go on*/
 	qeth_l3_start_ipa_source_mac(card);	/* go on*/

[patch 2/5] [PATCH] qeth: remaining EDDP cleanup

[frank.blaschka]

[-- Attachment #1: 607-qeth-eddp-cleanup.diff --]
[-- Type: text/plain, Size: 1153 bytes --]

From: Ursula Braun <ursula.braun@de.ibm.com>

EDDP code has been removed from qeth in 2009. This patch removes two
useless remaining EDDP-references.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
---

 drivers/s390/net/qeth_core.h |    2 --
 1 file changed, 2 deletions(-)

Index: git_net-next/drivers/s390/net/qeth_core.h
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_core.h
+++ git_net-next/drivers/s390/net/qeth_core.h
@@ -122,7 +122,6 @@ struct qeth_perf_stats {
 	__u64 outbound_do_qdio_start_time;
 	unsigned int outbound_do_qdio_cnt;
 	unsigned int outbound_do_qdio_time;
-	/* eddp data */
 	unsigned int large_send_bytes;
 	unsigned int large_send_cnt;
 	unsigned int sg_skbs_sent;
@@ -777,7 +776,6 @@ static inline void qeth_put_buffer_pool_
 	list_add_tail(&entry->list, &card->qdio.in_buf_pool.entry_list);
 }
 
-struct qeth_eddp_context;
 extern struct ccwgroup_driver qeth_l2_ccwgroup_driver;
 extern struct ccwgroup_driver qeth_l3_ccwgroup_driver;
 const char *qeth_get_cardname_short(struct qeth_card *);

[patch 3/5] [PATCH] qeth: Recognize return codes of ccw_device_set_online

[frank.blaschka]

[-- Attachment #1: 608-qeth-set_online-rc.diff --]
[-- Type: text/plain, Size: 6091 bytes --]

From: Ursula Braun <ursula.braun@de.ibm.com>

Setting a qeth device online requires to call function
ccw_device_set_online() for read-, write-, and data-subchannel.
Failures should be detected immediately without an attempt to
invoke follow-on activity qeth_qdio_clear_card().,

In addition, ccw_device_set_online calls are consolidated in
qeth_core_main.c only.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
---

 drivers/s390/net/qeth_core_main.c |   26 ++++++++++++++++----------
 drivers/s390/net/qeth_l2_main.c   |   26 ++++++++------------------
 drivers/s390/net/qeth_l3_main.c   |   25 +++++++------------------
 3 files changed, 31 insertions(+), 46 deletions(-)

Index: git_net-next/drivers/s390/net/qeth_core_main.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_core_main.c
+++ git_net-next/drivers/s390/net/qeth_core_main.c
@@ -3883,30 +3883,36 @@ static int qeth_core_driver_group(const 
 int qeth_core_hardsetup_card(struct qeth_card *card)
 {
 	struct qdio_ssqd_desc *ssqd;
-	int retries = 3;
+	int retries = 0;
 	int mpno = 0;
 	int rc;
 
 	QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
 	atomic_set(&card->force_alloc_skb, 0);
 retry:
-	if (retries < 3) {
+	if (retries)
 		QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
 			dev_name(&card->gdev->dev));
-		ccw_device_set_offline(CARD_DDEV(card));
-		ccw_device_set_offline(CARD_WDEV(card));
-		ccw_device_set_offline(CARD_RDEV(card));
-		ccw_device_set_online(CARD_RDEV(card));
-		ccw_device_set_online(CARD_WDEV(card));
-		ccw_device_set_online(CARD_DDEV(card));
-	}
+	ccw_device_set_offline(CARD_DDEV(card));
+	ccw_device_set_offline(CARD_WDEV(card));
+	ccw_device_set_offline(CARD_RDEV(card));
+	rc = ccw_device_set_online(CARD_RDEV(card));
+	if (rc)
+		goto retriable;
+	rc = ccw_device_set_online(CARD_WDEV(card));
+	if (rc)
+		goto retriable;
+	rc = ccw_device_set_online(CARD_DDEV(card));
+	if (rc)
+		goto retriable;
 	rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
+retriable:
 	if (rc == -ERESTARTSYS) {
 		QETH_DBF_TEXT(SETUP, 2, "break1");
 		return rc;
 	} else if (rc) {
 		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
-		if (--retries < 0)
+		if (++retries > 3)
 			goto out;
 		else
 			goto retry;
Index: git_net-next/drivers/s390/net/qeth_l2_main.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_l2_main.c
+++ git_net-next/drivers/s390/net/qeth_l2_main.c
@@ -940,30 +940,17 @@ static int __qeth_l2_set_online(struct c
 
 	qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 	recover_flag = card->state;
-	rc = ccw_device_set_online(CARD_RDEV(card));
-	if (rc) {
-		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
-		return -EIO;
-	}
-	rc = ccw_device_set_online(CARD_WDEV(card));
-	if (rc) {
-		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
-		return -EIO;
-	}
-	rc = ccw_device_set_online(CARD_DDEV(card));
-	if (rc) {
-		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
-		return -EIO;
-	}
-
 	rc = qeth_core_hardsetup_card(card);
 	if (rc) {
 		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
+		rc = -ENODEV;
 		goto out_remove;
 	}
 
-	if (!card->dev && qeth_l2_setup_netdev(card))
+	if (!card->dev && qeth_l2_setup_netdev(card)) {
+		rc = -ENODEV;
 		goto out_remove;
+	}
 
 	if (card->info.type != QETH_CARD_TYPE_OSN)
 		qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
@@ -983,6 +970,7 @@ static int __qeth_l2_set_online(struct c
 			card->lan_online = 0;
 			return 0;
 		}
+		rc = -ENODEV;
 		goto out_remove;
 	} else
 		card->lan_online = 1;
@@ -999,6 +987,7 @@ static int __qeth_l2_set_online(struct c
 	rc = qeth_init_qdio_queues(card);
 	if (rc) {
 		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
+		rc = -ENODEV;
 		goto out_remove;
 	}
 	card->state = CARD_STATE_SOFTSETUP;
@@ -1020,6 +1009,7 @@ static int __qeth_l2_set_online(struct c
 	/* let user_space know that device is online */
 	kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
 	return 0;
+
 out_remove:
 	card->use_hard_stop = 1;
 	qeth_l2_stop_card(card, 0);
@@ -1030,7 +1020,7 @@ out_remove:
 		card->state = CARD_STATE_RECOVER;
 	else
 		card->state = CARD_STATE_DOWN;
-	return -ENODEV;
+	return rc;
 }
 
 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
Index: git_net-next/drivers/s390/net/qeth_l3_main.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_l3_main.c
+++ git_net-next/drivers/s390/net/qeth_l3_main.c
@@ -3156,32 +3156,19 @@ static int __qeth_l3_set_online(struct c
 	qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 
 	recover_flag = card->state;
-	rc = ccw_device_set_online(CARD_RDEV(card));
-	if (rc) {
-		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
-		return -EIO;
-	}
-	rc = ccw_device_set_online(CARD_WDEV(card));
-	if (rc) {
-		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
-		return -EIO;
-	}
-	rc = ccw_device_set_online(CARD_DDEV(card));
-	if (rc) {
-		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
-		return -EIO;
-	}
-
 	rc = qeth_core_hardsetup_card(card);
 	if (rc) {
 		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
+		rc = -ENODEV;
 		goto out_remove;
 	}
 
 	qeth_l3_query_ipassists(card, QETH_PROT_IPV4);
 
-	if (!card->dev && qeth_l3_setup_netdev(card))
+	if (!card->dev && qeth_l3_setup_netdev(card)) {
+		rc = -ENODEV;
 		goto out_remove;
+	}
 
 	card->state = CARD_STATE_HARDSETUP;
 	qeth_print_status_message(card);
@@ -3198,6 +3185,7 @@ static int __qeth_l3_set_online(struct c
 			card->lan_online = 0;
 			return 0;
 		}
+		rc = -ENODEV;
 		goto out_remove;
 	} else
 		card->lan_online = 1;
@@ -3220,6 +3208,7 @@ static int __qeth_l3_set_online(struct c
 	rc = qeth_init_qdio_queues(card);
 	if (rc) {
 		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
+		rc = -ENODEV;
 		goto out_remove;
 	}
 	card->state = CARD_STATE_SOFTSETUP;
@@ -3250,7 +3239,7 @@ out_remove:
 		card->state = CARD_STATE_RECOVER;
 	else
 		card->state = CARD_STATE_DOWN;
-	return -ENODEV;
+	return rc;
 }
 
 static int qeth_l3_set_online(struct ccwgroup_device *gdev)

[patch 4/5] [PATCH] qeth: rework TSO functions

[frank.blaschka]

[-- Attachment #1: 609-qeth-rework-tso.diff --]
[-- Type: text/plain, Size: 12476 bytes --]

From: Frank Blaschka <frank.blaschka@de.ibm.com>

The maximum TSO size OSA can handle is 15 * PAGE_SIZE. This
patch reduces gso_max_size to this value and adds some sanity
checks and statistics to the TSO implementation.
Since only layer 3 is able to do TSO move all TSO related functions
to the qeth_l3 module.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
---

 drivers/s390/net/qeth_core.h      |    2 -
 drivers/s390/net/qeth_core_main.c |   37 +------------------
 drivers/s390/net/qeth_core_sys.c  |   48 -------------------------
 drivers/s390/net/qeth_l2_main.c   |    1 
 drivers/s390/net/qeth_l3.h        |    1 
 drivers/s390/net/qeth_l3_main.c   |   71 +++++++++++++++++++++++++++++++-------
 drivers/s390/net/qeth_l3_sys.c    |   48 +++++++++++++++++++++++++
 7 files changed, 110 insertions(+), 98 deletions(-)

Index: git_net-next/drivers/s390/net/qeth_core.h
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_core.h
+++ git_net-next/drivers/s390/net/qeth_core.h
@@ -134,6 +134,7 @@ struct qeth_perf_stats {
 	unsigned int sg_frags_rx;
 	unsigned int sg_alloc_page_rx;
 	unsigned int tx_csum;
+	unsigned int tx_lin;
 };
 
 /* Routing stuff */
@@ -835,7 +836,6 @@ void qeth_prepare_ipa_cmd(struct qeth_ca
 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *);
 int qeth_mdio_read(struct net_device *, int, int);
 int qeth_snmp_command(struct qeth_card *, char __user *);
-int qeth_set_large_send(struct qeth_card *, enum qeth_large_send_types);
 struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *, __u32, __u32);
 int qeth_default_setadapterparms_cb(struct qeth_card *, struct qeth_reply *,
 					unsigned long);
Index: git_net-next/drivers/s390/net/qeth_core_main.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_core_main.c
+++ git_net-next/drivers/s390/net/qeth_core_main.c
@@ -270,41 +270,6 @@ int qeth_realloc_buffer_pool(struct qeth
 	return qeth_alloc_buffer_pool(card);
 }
 
-int qeth_set_large_send(struct qeth_card *card,
-		enum qeth_large_send_types type)
-{
-	int rc = 0;
-
-	if (card->dev == NULL) {
-		card->options.large_send = type;
-		return 0;
-	}
-	if (card->state == CARD_STATE_UP)
-		netif_tx_disable(card->dev);
-	card->options.large_send = type;
-	switch (card->options.large_send) {
-	case QETH_LARGE_SEND_TSO:
-		if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
-			card->dev->features |= NETIF_F_TSO | NETIF_F_SG |
-						NETIF_F_HW_CSUM;
-		} else {
-			card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG |
-						NETIF_F_HW_CSUM);
-			card->options.large_send = QETH_LARGE_SEND_NO;
-			rc = -EOPNOTSUPP;
-		}
-		break;
-	default: /* includes QETH_LARGE_SEND_NO */
-		card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG |
-					NETIF_F_HW_CSUM);
-		break;
-	}
-	if (card->state == CARD_STATE_UP)
-		netif_wake_queue(card->dev);
-	return rc;
-}
-EXPORT_SYMBOL_GPL(qeth_set_large_send);
-
 static int qeth_issue_next_read(struct qeth_card *card)
 {
 	int rc;
@@ -4460,6 +4425,7 @@ static struct {
 	{"tx do_QDIO time"},
 	{"tx do_QDIO count"},
 	{"tx csum"},
+	{"tx lin"},
 };
 
 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
@@ -4517,6 +4483,7 @@ void qeth_core_get_ethtool_stats(struct 
 	data[31] = card->perf_stats.outbound_do_qdio_time;
 	data[32] = card->perf_stats.outbound_do_qdio_cnt;
 	data[33] = card->perf_stats.tx_csum;
+	data[34] = card->perf_stats.tx_lin;
 }
 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
 
Index: git_net-next/drivers/s390/net/qeth_core_sys.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_core_sys.c
+++ git_net-next/drivers/s390/net/qeth_core_sys.c
@@ -416,53 +416,6 @@ static ssize_t qeth_dev_layer2_store(str
 static DEVICE_ATTR(layer2, 0644, qeth_dev_layer2_show,
 		   qeth_dev_layer2_store);
 
-static ssize_t qeth_dev_large_send_show(struct device *dev,
-				struct device_attribute *attr, char *buf)
-{
-	struct qeth_card *card = dev_get_drvdata(dev);
-
-	if (!card)
-		return -EINVAL;
-
-	switch (card->options.large_send) {
-	case QETH_LARGE_SEND_NO:
-		return sprintf(buf, "%s\n", "no");
-	case QETH_LARGE_SEND_TSO:
-		return sprintf(buf, "%s\n", "TSO");
-	default:
-		return sprintf(buf, "%s\n", "N/A");
-	}
-}
-
-static ssize_t qeth_dev_large_send_store(struct device *dev,
-		struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct qeth_card *card = dev_get_drvdata(dev);
-	enum qeth_large_send_types type;
-	int rc = 0;
-	char *tmp;
-
-	if (!card)
-		return -EINVAL;
-	tmp = strsep((char **) &buf, "\n");
-	if (!strcmp(tmp, "no")) {
-		type = QETH_LARGE_SEND_NO;
-	} else if (!strcmp(tmp, "TSO")) {
-		type = QETH_LARGE_SEND_TSO;
-	} else {
-		return -EINVAL;
-	}
-	if (card->options.large_send == type)
-		return count;
-	rc = qeth_set_large_send(card, type);
-	if (rc)
-		return rc;
-	return count;
-}
-
-static DEVICE_ATTR(large_send, 0644, qeth_dev_large_send_show,
-		   qeth_dev_large_send_store);
-
 #define ATTR_QETH_ISOLATION_NONE	("none")
 #define ATTR_QETH_ISOLATION_FWD		("forward")
 #define ATTR_QETH_ISOLATION_DROP	("drop")
@@ -658,7 +611,6 @@ static struct attribute *qeth_device_att
 	&dev_attr_recover.attr,
 	&dev_attr_performance_stats.attr,
 	&dev_attr_layer2.attr,
-	&dev_attr_large_send.attr,
 	&dev_attr_isolation.attr,
 	NULL,
 };
Index: git_net-next/drivers/s390/net/qeth_l2_main.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_l2_main.c
+++ git_net-next/drivers/s390/net/qeth_l2_main.c
@@ -978,7 +978,6 @@ static int __qeth_l2_set_online(struct c
 	if (card->info.type != QETH_CARD_TYPE_OSN) {
 		/* configure isolation level */
 		qeth_set_access_ctrl_online(card);
-		qeth_set_large_send(card, card->options.large_send);
 		qeth_l2_process_vlans(card, 0);
 	}
 
Index: git_net-next/drivers/s390/net/qeth_l3.h
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_l3.h
+++ git_net-next/drivers/s390/net/qeth_l3.h
@@ -60,5 +60,6 @@ void qeth_l3_del_vipa(struct qeth_card *
 int qeth_l3_add_rxip(struct qeth_card *, enum qeth_prot_versions, const u8 *);
 void qeth_l3_del_rxip(struct qeth_card *card, enum qeth_prot_versions,
 			const u8 *);
+int qeth_l3_set_large_send(struct qeth_card *, enum qeth_large_send_types);
 
 #endif /* __QETH_L3_H__ */
Index: git_net-next/drivers/s390/net/qeth_l3_main.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_l3_main.c
+++ git_net-next/drivers/s390/net/qeth_l3_main.c
@@ -41,6 +41,32 @@ static int qeth_l3_deregister_addr_entry
 static int __qeth_l3_set_online(struct ccwgroup_device *, int);
 static int __qeth_l3_set_offline(struct ccwgroup_device *, int);
 
+int qeth_l3_set_large_send(struct qeth_card *card,
+		enum qeth_large_send_types type)
+{
+	int rc = 0;
+
+	card->options.large_send = type;
+	if (card->dev == NULL)
+		return 0;
+
+	if (card->options.large_send == QETH_LARGE_SEND_TSO) {
+		if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
+			card->dev->features |= NETIF_F_TSO | NETIF_F_SG |
+					NETIF_F_HW_CSUM;
+		} else {
+			card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG |
+					NETIF_F_HW_CSUM);
+			card->options.large_send = QETH_LARGE_SEND_NO;
+			rc = -EOPNOTSUPP;
+		}
+	} else {
+		card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG |
+					NETIF_F_HW_CSUM);
+		card->options.large_send = QETH_LARGE_SEND_NO;
+	}
+	return rc;
+}
 
 static int qeth_l3_isxdigit(char *buf)
 {
@@ -2686,6 +2712,24 @@ static void qeth_tx_csum(struct sk_buff 
 	*(__sum16 *)(skb->data + offset) = csum_fold(csum);
 }
 
+static inline int qeth_l3_tso_elements(struct sk_buff *skb)
+{
+	unsigned long tcpd = (unsigned long)tcp_hdr(skb) +
+		tcp_hdr(skb)->doff * 4;
+	int tcpd_len = skb->len - (tcpd - (unsigned long)skb->data);
+	int elements = PFN_UP(tcpd + tcpd_len) - PFN_DOWN(tcpd);
+	elements += skb_shinfo(skb)->nr_frags;
+	return elements;
+}
+
+static inline int qeth_l3_tso_check(struct sk_buff *skb)
+{
+	int len = ((unsigned long)tcp_hdr(skb) + tcp_hdr(skb)->doff * 4) -
+		(unsigned long)skb->data;
+	return (((unsigned long)skb->data & PAGE_MASK) !=
+		(((unsigned long)skb->data + len) & PAGE_MASK));
+}
+
 static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	int rc;
@@ -2779,16 +2823,21 @@ static int qeth_l3_hard_start_xmit(struc
 	/* fix hardware limitation: as long as we do not have sbal
 	 * chaining we can not send long frag lists
 	 */
-	if ((large_send == QETH_LARGE_SEND_TSO) &&
-	    ((skb_shinfo(new_skb)->nr_frags + 2) > 16)) {
-		if (skb_linearize(new_skb))
-			goto tx_drop;
+	if (large_send == QETH_LARGE_SEND_TSO) {
+		if (qeth_l3_tso_elements(new_skb) + 1 > 16) {
+			if (skb_linearize(new_skb))
+				goto tx_drop;
+			if (card->options.performance_stats)
+				card->perf_stats.tx_lin++;
+		}
 	}
 
 	if ((large_send == QETH_LARGE_SEND_TSO) &&
 	    (cast_type == RTN_UNSPEC)) {
 		hdr = (struct qeth_hdr *)skb_push(new_skb,
 						sizeof(struct qeth_hdr_tso));
+		if (qeth_l3_tso_check(new_skb))
+			QETH_DBF_MESSAGE(2, "tso skb misaligned\n");
 		memset(hdr, 0, sizeof(struct qeth_hdr_tso));
 		qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type);
 		qeth_tso_fill_header(card, hdr, new_skb);
@@ -2931,20 +2980,15 @@ static int qeth_l3_ethtool_set_rx_csum(s
 static int qeth_l3_ethtool_set_tso(struct net_device *dev, u32 data)
 {
 	struct qeth_card *card = dev->ml_priv;
+	int rc = 0;
 
 	if (data) {
-		if (card->options.large_send == QETH_LARGE_SEND_NO) {
-			if (card->info.type == QETH_CARD_TYPE_IQD)
-				return -EPERM;
-			else
-				card->options.large_send = QETH_LARGE_SEND_TSO;
-			dev->features |= NETIF_F_TSO;
-		}
+		rc = qeth_l3_set_large_send(card, QETH_LARGE_SEND_TSO);
 	} else {
 		dev->features &= ~NETIF_F_TSO;
 		card->options.large_send = QETH_LARGE_SEND_NO;
 	}
-	return 0;
+	return rc;
 }
 
 static const struct ethtool_ops qeth_l3_ethtool_ops = {
@@ -3060,6 +3104,7 @@ static int qeth_l3_setup_netdev(struct q
 				NETIF_F_HW_VLAN_RX |
 				NETIF_F_HW_VLAN_FILTER;
 	card->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+	card->dev->gso_max_size = 15 * PAGE_SIZE;
 
 	SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 	return register_netdev(card->dev);
@@ -3189,7 +3234,7 @@ static int __qeth_l3_set_online(struct c
 		goto out_remove;
 	} else
 		card->lan_online = 1;
-	qeth_set_large_send(card, card->options.large_send);
+	qeth_l3_set_large_send(card, card->options.large_send);
 
 	rc = qeth_l3_setadapter_parms(card);
 	if (rc)
Index: git_net-next/drivers/s390/net/qeth_l3_sys.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_l3_sys.c
+++ git_net-next/drivers/s390/net/qeth_l3_sys.c
@@ -318,6 +318,53 @@ static ssize_t qeth_l3_dev_checksum_stor
 static DEVICE_ATTR(checksumming, 0644, qeth_l3_dev_checksum_show,
 		qeth_l3_dev_checksum_store);
 
+static ssize_t qeth_l3_dev_large_send_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct qeth_card *card = dev_get_drvdata(dev);
+
+	if (!card)
+		return -EINVAL;
+
+	switch (card->options.large_send) {
+	case QETH_LARGE_SEND_NO:
+		return sprintf(buf, "%s\n", "no");
+	case QETH_LARGE_SEND_TSO:
+		return sprintf(buf, "%s\n", "TSO");
+	default:
+		return sprintf(buf, "%s\n", "N/A");
+	}
+}
+
+static ssize_t qeth_l3_dev_large_send_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct qeth_card *card = dev_get_drvdata(dev);
+	enum qeth_large_send_types type;
+	int rc = 0;
+	char *tmp;
+
+	if (!card)
+		return -EINVAL;
+	tmp = strsep((char **) &buf, "\n");
+	if (!strcmp(tmp, "no"))
+		type = QETH_LARGE_SEND_NO;
+	else if (!strcmp(tmp, "TSO"))
+		type = QETH_LARGE_SEND_TSO;
+	else
+		return -EINVAL;
+
+	if (card->options.large_send == type)
+		return count;
+	rc = qeth_l3_set_large_send(card, type);
+	if (rc)
+		return rc;
+	return count;
+}
+
+static DEVICE_ATTR(large_send, 0644, qeth_l3_dev_large_send_show,
+		   qeth_l3_dev_large_send_store);
+
 static struct attribute *qeth_l3_device_attrs[] = {
 	&dev_attr_route4.attr,
 	&dev_attr_route6.attr,
@@ -325,6 +372,7 @@ static struct attribute *qeth_l3_device_
 	&dev_attr_broadcast_mode.attr,
 	&dev_attr_canonical_macaddr.attr,
 	&dev_attr_checksumming.attr,
+	&dev_attr_large_send.attr,
 	NULL,
 };
 

Re: [patch 4/5] [PATCH] qeth: rework TSO functions

[David Miller]

From: frank.blaschka@de.ibm.com
Date: Thu, 12 Nov 2009 11:11:44 +0100

> From: Frank Blaschka <frank.blaschka@de.ibm.com>
> 
> The maximum TSO size OSA can handle is 15 * PAGE_SIZE. This
> patch reduces gso_max_size to this value and adds some sanity
> checks and statistics to the TSO implementation.
> Since only layer 3 is able to do TSO move all TSO related functions
> to the qeth_l3 module.
> 
> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>

Please don't add sysctl knobs for getting and setting TSO enabling,
that's what ethtool is for.

Re: [patch 4/5] [PATCH] qeth: rework TSO functions

[Frank Blaschka]

David Miller schrieb:
> From: frank.blaschka@de.ibm.com
> Date: Thu, 12 Nov 2009 11:11:44 +0100
> 
>> From: Frank Blaschka <frank.blaschka@de.ibm.com>
>>
>> The maximum TSO size OSA can handle is 15 * PAGE_SIZE. This
>> patch reduces gso_max_size to this value and adds some sanity
>> checks and statistics to the TSO implementation.
>> Since only layer 3 is able to do TSO move all TSO related functions
>> to the qeth_l3 module.
>>
>> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
> 
> Please don't add sysctl knobs for getting and setting TSO enabling,
> that's what ethtool is for.
I did not add any new sysfs knobs for TSO. The old one was just moved
from the core part of the driver to the L3 discipline. I know ethtool
is the way to configure TSO and I would be happy to drop sysfs off, but
we have to keep this legacy interface because of our customers and
distributors. If you say there is no way to keep it let me know and I
will rework the patch.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-s390" in
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Re: [patch 4/5] [PATCH] qeth: rework TSO functions

[David Miller]

From: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Date: Mon, 16 Nov 2009 07:58:37 +0100

> I did not add any new sysfs knobs for TSO. The old one was just moved
> from the core part of the driver to the L3 discipline. I know ethtool
> is the way to configure TSO and I would be happy to drop sysfs off, but
> we have to keep this legacy interface because of our customers and
> distributors. If you say there is no way to keep it let me know and I
> will rework the patch.

Ok, if it's always been there :-/  It never should have been added
in the first place.

I'll add these patches to net-next-2.6, thanks.

[patch 5/5] [PATCH] qeth: allow dynamic change of rx checksumming

[frank.blaschka]

[-- Attachment #1: 610-qeth-rx-checksum.diff --]
[-- Type: text/plain, Size: 4091 bytes --]

From: Frank Blaschka <frank.blaschka@de.ibm.com>

Technically there is no need to set the card offline to change
RX checksumming. Get rid of this stupid limitation.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
---

 drivers/s390/net/qeth_l3.h      |    1 
 drivers/s390/net/qeth_l3_main.c |   44 +++++++++++++++++++++++++++-------------
 drivers/s390/net/qeth_l3_sys.c  |   19 +++++++++--------
 3 files changed, 41 insertions(+), 23 deletions(-)

Index: git_net-next/drivers/s390/net/qeth_l3.h
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_l3.h
+++ git_net-next/drivers/s390/net/qeth_l3.h
@@ -61,5 +61,6 @@ int qeth_l3_add_rxip(struct qeth_card *,
 void qeth_l3_del_rxip(struct qeth_card *card, enum qeth_prot_versions,
 			const u8 *);
 int qeth_l3_set_large_send(struct qeth_card *, enum qeth_large_send_types);
+int qeth_l3_set_rx_csum(struct qeth_card *, enum qeth_checksum_types);
 
 #endif /* __QETH_L3_H__ */
Index: git_net-next/drivers/s390/net/qeth_l3_main.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_l3_main.c
+++ git_net-next/drivers/s390/net/qeth_l3_main.c
@@ -1465,6 +1465,35 @@ static int qeth_l3_send_checksum_command
 	return 0;
 }
 
+int qeth_l3_set_rx_csum(struct qeth_card *card,
+	enum qeth_checksum_types csum_type)
+{
+	int rc = 0;
+
+	if (card->options.checksum_type == HW_CHECKSUMMING) {
+		if ((csum_type != HW_CHECKSUMMING) &&
+			(card->state != CARD_STATE_DOWN)) {
+			rc = qeth_l3_send_simple_setassparms(card,
+				IPA_INBOUND_CHECKSUM, IPA_CMD_ASS_STOP, 0);
+			if (rc)
+				return -EIO;
+		}
+	} else {
+		if (csum_type == HW_CHECKSUMMING) {
+			if (card->state != CARD_STATE_DOWN) {
+				if (!qeth_is_supported(card,
+				    IPA_INBOUND_CHECKSUM))
+					return -EPERM;
+				rc = qeth_l3_send_checksum_command(card);
+				if (rc)
+					return -EIO;
+			}
+		}
+	}
+	card->options.checksum_type = csum_type;
+	return rc;
+}
+
 static int qeth_l3_start_ipa_checksum(struct qeth_card *card)
 {
 	int rc = 0;
@@ -2954,27 +2983,14 @@ static u32 qeth_l3_ethtool_get_rx_csum(s
 static int qeth_l3_ethtool_set_rx_csum(struct net_device *dev, u32 data)
 {
 	struct qeth_card *card = dev->ml_priv;
-	enum qeth_card_states old_state;
 	enum qeth_checksum_types csum_type;
 
-	if ((card->state != CARD_STATE_UP) &&
-	    (card->state != CARD_STATE_DOWN))
-		return -EPERM;
-
 	if (data)
 		csum_type = HW_CHECKSUMMING;
 	else
 		csum_type = SW_CHECKSUMMING;
 
-	if (card->options.checksum_type != csum_type) {
-		old_state = card->state;
-		if (card->state == CARD_STATE_UP)
-			__qeth_l3_set_offline(card->gdev, 1);
-		card->options.checksum_type = csum_type;
-		if (old_state == CARD_STATE_UP)
-			__qeth_l3_set_online(card->gdev, 1);
-	}
-	return 0;
+	return qeth_l3_set_rx_csum(card, csum_type);
 }
 
 static int qeth_l3_ethtool_set_tso(struct net_device *dev, u32 data)
Index: git_net-next/drivers/s390/net/qeth_l3_sys.c
===================================================================
--- git_net-next.orig/drivers/s390/net/qeth_l3_sys.c
+++ git_net-next/drivers/s390/net/qeth_l3_sys.c
@@ -293,25 +293,26 @@ static ssize_t qeth_l3_dev_checksum_stor
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct qeth_card *card = dev_get_drvdata(dev);
+	enum qeth_checksum_types csum_type;
 	char *tmp;
+	int rc;
 
 	if (!card)
 		return -EINVAL;
 
-	if ((card->state != CARD_STATE_DOWN) &&
-	    (card->state != CARD_STATE_RECOVER))
-		return -EPERM;
-
 	tmp = strsep((char **) &buf, "\n");
 	if (!strcmp(tmp, "sw_checksumming"))
-		card->options.checksum_type = SW_CHECKSUMMING;
+		csum_type = SW_CHECKSUMMING;
 	else if (!strcmp(tmp, "hw_checksumming"))
-		card->options.checksum_type = HW_CHECKSUMMING;
+		csum_type = HW_CHECKSUMMING;
 	else if (!strcmp(tmp, "no_checksumming"))
-		card->options.checksum_type = NO_CHECKSUMMING;
-	else {
+		csum_type = NO_CHECKSUMMING;
+	else
 		return -EINVAL;
-	}
+
+	rc = qeth_l3_set_rx_csum(card, csum_type);
+	if (rc)
+		return rc;
 	return count;
 }
 

Re: [patch 0/5] s390: qeth patches for 2.6.33

[David Miller]

I'm still waiting for you to reimplement patch #4 with the
TSO sysfs bits removed...