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path: root/drivers/net/ipa/ipa_qmi.h
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Diffstat (limited to 'drivers/net/ipa/ipa_qmi.h')
-rw-r--r--drivers/net/ipa/ipa_qmi.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/ipa/ipa_qmi.h b/drivers/net/ipa/ipa_qmi.h
index b6f2055d35a6..856ef629ccc8 100644
--- a/drivers/net/ipa/ipa_qmi.h
+++ b/drivers/net/ipa/ipa_qmi.h
@@ -39,7 +39,26 @@ struct ipa_qmi {
bool indication_sent;
};
+/**
+ * ipa_qmi_setup() - Set up for QMI message exchange
+ * @ipa: IPA pointer
+ *
+ * This is called at the end of ipa_setup(), to prepare for the exchange
+ * of QMI messages that perform a "handshake" between the AP and modem.
+ * When the modem QMI server announces its presence, an AP request message
+ * supplies operating parameters to be used to the modem, and the modem
+ * acknowledges receipt of those parameters. The modem will not touch the
+ * IPA hardware until this handshake is complete.
+ *
+ * If the modem crashes (or shuts down) a new handshake begins when the
+ * modem's QMI server is started again.
+ */
int ipa_qmi_setup(struct ipa *ipa);
+
+/**
+ * ipa_qmi_teardown() - Tear down IPA QMI handles
+ * @ipa: IPA pointer
+ */
void ipa_qmi_teardown(struct ipa *ipa);
#endif /* !_IPA_QMI_H_ */