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authorFrank Blaschka <frank.blaschka@de.ibm.com>2009-11-12 00:11:44 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-16 02:42:08 -0800
commitc3b4a740db3688b245282ac957a01f3fb8d1186d (patch)
treeca05c6e683b5b2371ba265aa6db9536441f94f1a /drivers/s390/net/qeth_l3_sys.c
parentaa90922479513db0d080239324d0d04701418ba5 (diff)
qeth: rework TSO functions
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> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net/qeth_l3_sys.c')
-rw-r--r--drivers/s390/net/qeth_l3_sys.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_l3_sys.c b/drivers/s390/net/qeth_l3_sys.c
index c144b9924d52..88f200c8ea3c 100644
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -318,6 +318,53 @@ static ssize_t qeth_l3_dev_checksum_store(struct device *dev,
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_attrs[] = {
&dev_attr_broadcast_mode.attr,
&dev_attr_canonical_macaddr.attr,
&dev_attr_checksumming.attr,
+ &dev_attr_large_send.attr,
NULL,
};