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port-qmi: read checksum offload link flags to use from kernel rmnet driver

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The feature/rx_offload and feature/tx_offload sysfs attributes specify
which offload settings should be used when creating new links.
This commit is contained in:
Aleksander Morgado
2023-03-21 12:52:28 +00:00
committed by Aleksander Morgado
parent f96664a159
commit b0fce20f73
1 changed files with 36 additions and 13 deletions
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49
src/mm-port-qmi.c
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@@ -682,6 +682,41 @@ initialize_preallocated_links_ready (MMPortQmi *self,
}
}
static QmiDeviceAddLinkFlags
get_rmnet_device_add_link_flags (MMPortQmi *self)
{
QmiDeviceAddLinkFlags flags = QMI_DEVICE_ADD_LINK_FLAGS_NONE;
g_autofree gchar *flags_str = NULL;
if (g_strcmp0 (self->priv->net_driver, "ipa") == 0) {
g_autofree gchar *tx_sysfs_path = NULL;
g_autofree gchar *rx_sysfs_path = NULL;
g_autofree gchar *tx_sysfs_str = NULL;
g_autofree gchar *rx_sysfs_str = NULL;
tx_sysfs_path = g_build_filename (self->priv->net_sysfs_path, "device", "feature", "tx_offload", NULL);
rx_sysfs_path = g_build_filename (self->priv->net_sysfs_path, "device", "feature", "rx_offload", NULL);
if (g_file_get_contents (rx_sysfs_path, &rx_sysfs_str, NULL, NULL) && rx_sysfs_str) {
if (g_str_has_prefix (rx_sysfs_str, "MAPv4"))
flags |= QMI_DEVICE_ADD_LINK_FLAGS_INGRESS_MAP_CKSUMV4;
else if (g_str_has_prefix (rx_sysfs_str, "MAPv5"))
flags |= QMI_DEVICE_ADD_LINK_FLAGS_INGRESS_MAP_CKSUMV5;
}
if (g_file_get_contents (tx_sysfs_path, &tx_sysfs_str, NULL, NULL) && tx_sysfs_str) {
if (g_str_has_prefix (tx_sysfs_str, "MAPv4"))
flags |= QMI_DEVICE_ADD_LINK_FLAGS_EGRESS_MAP_CKSUMV4;
else if (g_str_has_prefix (tx_sysfs_str, "MAPv5"))
flags |= QMI_DEVICE_ADD_LINK_FLAGS_EGRESS_MAP_CKSUMV5;
}
}
flags_str = qmi_device_add_link_flags_build_string_from_mask (flags);
mm_obj_dbg (self, "Creating RMNET link with flags: %s", flags_str);
return flags;
}
void
mm_port_qmi_setup_link (MMPortQmi *self,
MMPort *data,
@@ -719,23 +754,11 @@ mm_port_qmi_setup_link (MMPortQmi *self,
/* When using rmnet, just try to add link in the QmiDevice */
if (self->priv->kernel_data_modes & MM_PORT_QMI_KERNEL_DATA_MODE_MUX_RMNET) {
QmiDeviceAddLinkFlags flags = QMI_DEVICE_ADD_LINK_FLAGS_NONE;
/* This may not be fully right, but it's the only way forward we know
* right now for the Qualcomm SoCs based on QRTR+IPA, where QMAPV4 is
* used and the device has checksum offload enabled by default, so we
* should create the link with special flags. Ideally, we would have a
* way to know in advance whether the checksum offload flags are needed
* or not.
*/
if (self->priv->dap == QMI_WDA_DATA_AGGREGATION_PROTOCOL_QMAPV4)
flags = (QMI_DEVICE_ADD_LINK_FLAGS_INGRESS_MAP_CKSUMV4 | QMI_DEVICE_ADD_LINK_FLAGS_EGRESS_MAP_CKSUMV4);
qmi_device_add_link_with_flags (self->priv->qmi_device,
QMI_DEVICE_MUX_ID_AUTOMATIC,
mm_kernel_device_get_name (mm_port_peek_kernel_device (data)),
link_prefix_hint,
flags,
get_rmnet_device_add_link_flags (self),
NULL,
(GAsyncReadyCallback) device_add_link_ready,
task);