spapr: convert TCE API to use an opaque type

The TCE table is currently returned as a DMAContext, and non-type-safe
APIs are called later passing back the DMAContext.  Since we want to move
away from DMAContext, use an opaque type instead, and add an accessor
to retrieve the DMAContext from it.

Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

3 files changed, 9 insertions, 6 deletions

diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h
index b21080cd58..653dd40f6b 100644
--- a/include/hw/pci-host/spapr.h
+++ b/include/hw/pci-host/spapr.h
@@ -49,7 +49,7 @@ typedef struct sPAPRPHBState {
     uint32_t dma_liobn;
     uint64_t dma_window_start;
     uint64_t dma_window_size;
-    DMAContext *dma;
+    sPAPRTCETable *tcet;
 
     struct {
         uint32_t irq;
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 864bee9d00..e8d617b417 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -342,17 +342,19 @@ typedef struct sPAPRTCE {
 
 #define RTAS_ERROR_LOG_MAX      2048
 
+typedef struct sPAPRTCETable sPAPRTCETable;
 
 void spapr_iommu_init(void);
 void spapr_events_init(sPAPREnvironment *spapr);
 void spapr_events_fdt_skel(void *fdt, uint32_t epow_irq);
-DMAContext *spapr_tce_new_dma_context(uint32_t liobn, size_t window_size);
-void spapr_tce_free(DMAContext *dma);
-void spapr_tce_reset(DMAContext *dma);
-void spapr_tce_set_bypass(DMAContext *dma, bool bypass);
+sPAPRTCETable *spapr_tce_new_table(uint32_t liobn, size_t window_size);
+DMAContext *spapr_tce_get_dma(sPAPRTCETable *tcet);
+void spapr_tce_free(sPAPRTCETable *tcet);
+void spapr_tce_reset(sPAPRTCETable *tcet);
+void spapr_tce_set_bypass(sPAPRTCETable *tcet, bool bypass);
 int spapr_dma_dt(void *fdt, int node_off, const char *propname,
                  uint32_t liobn, uint64_t window, uint32_t size);
 int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname,
-                      DMAContext *dma);
+                      sPAPRTCETable *tcet);
 
 #endif /* !defined (__HW_SPAPR_H__) */
diff --git a/include/hw/ppc/spapr_vio.h b/include/hw/ppc/spapr_vio.h
index f98ec0a2e5..56f2821083 100644
--- a/include/hw/ppc/spapr_vio.h
+++ b/include/hw/ppc/spapr_vio.h
@@ -63,6 +63,7 @@ struct VIOsPAPRDevice {
     uint32_t irq;
     target_ulong signal_state;
     VIOsPAPR_CRQ crq;
+    sPAPRTCETable *tcet;
     DMAContext *dma;
 };