tpm: move recv_data_callback to TPM interface

Simplify the TPM backend setup, move callback to TPM interface.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>

backends/tpm.c

@@ -44,11 +44,9 @@ enum TpmType tpm_backend_get_type(TPMBackend *s)
     return k->type;
 }
 
-int tpm_backend_init(TPMBackend *s, TPMState *state,
+int tpm_backend_init(TPMBackend *s, TPMState *state)
-                     TPMRecvDataCB *datacb)
 {
     s->tpm_state = state;
-    s->recv_data_callback = datacb;
     s->had_startup_error = false;
 
     return 0;

hw/tpm/tpm_emulator.c

@@ -176,6 +176,7 @@ static int tpm_emulator_set_locality(TPMEmulator *tpm_emu, uint8_t locty_number,
 static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd *cmd)
 {
     TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
+    TPMIfClass *tic = TPM_IF_GET_CLASS(tb->tpm_state);
     Error *err = NULL;
 
     DPRINTF("processing TPM command");
@@ -190,7 +191,7 @@ static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd *cmd)
         goto error;
     }
 
-    tb->recv_data_callback(tb->tpm_state);
+    tic->request_completed(TPM_IF(tb->tpm_state));
     return;
 
 error:

hw/tpm/tpm_int.h

@@ -29,6 +29,9 @@ typedef struct TPMIf {
 
 typedef struct TPMIfClass {
     InterfaceClass parent_class;
+
+    /* run in thread pool by backend */
+    void (*request_completed)(TPMIf *obj);
 } TPMIfClass;
 
 #define TPM_STANDARD_CMDLINE_OPTS               \

hw/tpm/tpm_passthrough.c

@@ -139,13 +139,14 @@ err_exit:
 static void tpm_passthrough_handle_request(TPMBackend *tb, TPMBackendCmd *cmd)
 {
     TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb);
+    TPMIfClass *tic = TPM_IF_GET_CLASS(tb->tpm_state);
 
     DPRINTF("tpm_passthrough: processing command %p\n", cmd);
 
     tpm_passthrough_unix_tx_bufs(tpm_pt, cmd->in, cmd->in_len,
                                  cmd->out, cmd->out_len, &cmd->selftest_done);
 
-    tb->recv_data_callback(tb->tpm_state);
+    tic->request_completed(TPM_IF(tb->tpm_state));
 }
 
 static void tpm_passthrough_reset(TPMBackend *tb)

hw/tpm/tpm_tis.c

@@ -430,11 +430,10 @@ static void tpm_tis_receive_bh(void *opaque)
                       TPM_TIS_INT_DATA_AVAILABLE | TPM_TIS_INT_STS_VALID);
 }
 
-/*
+static void tpm_tis_request_completed(TPMIf *ti)
- * Callback from the TPM to indicate that the response was received.
- */
-static void tpm_tis_receive_cb(TPMState *s)
 {
+    TPMState *s = TPM(ti);
+
     bool is_selftest_done = s->cmd.selftest_done;
     uint8_t locty = s->cmd.locty;
     uint8_t l;
@@ -1078,7 +1077,7 @@ static void tpm_tis_realizefn(DeviceState *dev, Error **errp)
 
     s->be_driver->fe_model = TPM_MODEL_TPM_TIS;
 
-    if (tpm_backend_init(s->be_driver, s, tpm_tis_receive_cb)) {
+    if (tpm_backend_init(s->be_driver, s)) {
         error_setg(errp, "tpm_tis: backend driver with id %s could not be "
                    "initialized", s->backend);
         return;
@@ -1110,11 +1109,13 @@ static void tpm_tis_initfn(Object *obj)
 static void tpm_tis_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    TPMIfClass *tc = TPM_IF_CLASS(klass);
 
     dc->realize = tpm_tis_realizefn;
     dc->props = tpm_tis_properties;
     dc->reset = tpm_tis_reset;
     dc->vmsd  = &vmstate_tpm_tis;
+    tc->request_completed = tpm_tis_request_completed;
 }
 
 static const TypeInfo tpm_tis_info = {

include/sysemu/tpm_backend.h

@@ -30,8 +30,6 @@
 typedef struct TPMBackendClass TPMBackendClass;
 typedef struct TPMBackend TPMBackend;
 
-typedef void (TPMRecvDataCB)(TPMState *);
-
 typedef struct TPMBackendCmd {
     uint8_t locty;
     const uint8_t *in;
@@ -48,7 +46,6 @@ struct TPMBackend {
     bool opened;
     TPMState *tpm_state;
     GThreadPool *thread_pool;
-    TPMRecvDataCB *recv_data_callback;
     bool had_startup_error;
 
     /* <public> */
@@ -106,8 +103,7 @@ enum TpmType tpm_backend_get_type(TPMBackend *s);
  *
  * Returns 0 on success.
  */
-int tpm_backend_init(TPMBackend *s, TPMState *state,
+int tpm_backend_init(TPMBackend *s, TPMState *state);
-                     TPMRecvDataCB *datacb);
 
 /**
  * tpm_backend_startup_tpm: