commit 5484f30b2c48ba526f922e6b10e7ab3566c0b8a0
author Hervé Poussineau <hpoussin@reactos.org> Wed Feb 03 11:28:57 2016 -0500
committer John Snow <jsnow@redhat.com> Wed Feb 03 11:28:57 2016 -0500
tree a43632da737a869d5acea82ff5c0b14e778e8e4e
parent f5f19ee2e448a8442f1974ca1a0b8864486ed25b

isa: add an ISA DMA interface, and store it within the ISA bus

This will permit to deprecate global DMA_*() functions.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Message-id: 1453843944-26833-11-git-send-email-hpoussin@reactos.org
Signed-off-by: John Snow <jsnow@redhat.com>

include/hw/isa/isa.h

diff --git a/include/hw/isa/isa.h b/include/hw/isa/isa.h
index 4af8730..8de439c 100644
--- a/include/hw/isa/isa.h
+++ b/include/hw/isa/isa.h
@@ -34,6 +34,41 @@
     return 0;
 }
 
+#define TYPE_ISADMA "isa-dma"
+
+#define ISADMA_CLASS(klass) \
+    OBJECT_CLASS_CHECK(IsaDmaClass, (klass), TYPE_ISADMA)
+#define ISADMA_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(IsaDmaClass, (obj), TYPE_ISADMA)
+#define ISADMA(obj) \
+    INTERFACE_CHECK(IsaDma, (obj), TYPE_ISADMA)
+
+struct IsaDma {
+    Object parent;
+};
+
+typedef enum {
+    ISADMA_TRANSFER_VERIFY,
+    ISADMA_TRANSFER_READ,
+    ISADMA_TRANSFER_WRITE,
+    ISADMA_TRANSFER_ILLEGAL,
+} IsaDmaTransferMode;
+
+typedef struct IsaDmaClass {
+    InterfaceClass parent;
+
+    IsaDmaTransferMode (*get_transfer_mode)(IsaDma *obj, int nchan);
+    bool (*has_autoinitialization)(IsaDma *obj, int nchan);
+    int (*read_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
+    int (*write_memory)(IsaDma *obj, int nchan, void *buf, int pos, int len);
+    void (*hold_DREQ)(IsaDma *obj, int nchan);
+    void (*release_DREQ)(IsaDma *obj, int nchan);
+    void (*schedule)(IsaDma *obj);
+    void (*register_channel)(IsaDma *obj, int nchan,
+                             DMA_transfer_handler transfer_handler,
+                             void *opaque);
+} IsaDmaClass;
+
 typedef struct ISADeviceClass {
     DeviceClass parent_class;
 } ISADeviceClass;
@@ -46,6 +81,7 @@
     MemoryRegion *address_space;
     MemoryRegion *address_space_io;
     qemu_irq *irqs;
+    IsaDma *dma[2];
 };
 
 struct ISADevice {
@@ -63,6 +99,8 @@
 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs);
 qemu_irq isa_get_irq(ISADevice *dev, int isairq);
 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
+void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16);
+IsaDma *isa_get_dma(ISABus *bus, int nchan);
 MemoryRegion *isa_address_space(ISADevice *dev);
 MemoryRegion *isa_address_space_io(ISADevice *dev);
 ISADevice *isa_create(ISABus *bus, const char *name);