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[Qemu-devel] [PATCH 08/17] isa: add an ISA DMA interface, and store it w
From: |
Hervé Poussineau |
Subject: |
[Qemu-devel] [PATCH 08/17] isa: add an ISA DMA interface, and store it within the ISA bus |
Date: |
Tue, 29 Dec 2015 09:04:45 +0100 |
This will permit to deprecate global DMA_*() functions.
Signed-off-by: Hervé Poussineau <address@hidden>
---
hw/isa/isa-bus.c | 21 +++++++++++++++++++++
include/hw/isa/isa.h | 38 ++++++++++++++++++++++++++++++++++++++
include/qemu/typedefs.h | 1 +
3 files changed, 60 insertions(+)
diff --git a/hw/isa/isa-bus.c b/hw/isa/isa-bus.c
index 43e0cd8..8887433 100644
--- a/hw/isa/isa-bus.c
+++ b/hw/isa/isa-bus.c
@@ -36,6 +36,12 @@ static void isa_bus_class_init(ObjectClass *klass, void
*data)
k->get_fw_dev_path = isabus_get_fw_dev_path;
}
+static const TypeInfo isa_dma_info = {
+ .name = TYPE_ISADMA,
+ .parent = TYPE_INTERFACE,
+ .class_size = sizeof(IsaDmaClass),
+};
+
static const TypeInfo isa_bus_info = {
.name = TYPE_ISA_BUS,
.parent = TYPE_BUS,
@@ -92,6 +98,20 @@ void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)
dev->nirqs++;
}
+void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
+{
+ assert(bus && dma8 && dma16);
+ assert(!bus->dma[0] && !bus->dma[1]);
+ bus->dma[0] = dma8;
+ bus->dma[1] = dma16;
+}
+
+IsaDma *isa_get_dma(ISABus *bus, int nchan)
+{
+ assert(bus);
+ return bus->dma[nchan > 3 ? 1 : 0];
+}
+
static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
{
if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
@@ -233,6 +253,7 @@ static const TypeInfo isa_device_type_info = {
static void isabus_register_types(void)
{
+ type_register_static(&isa_dma_info);
type_register_static(&isa_bus_info);
type_register_static(&isabus_bridge_info);
type_register_static(&isa_device_type_info);
diff --git a/include/hw/isa/isa.h b/include/hw/isa/isa.h
index d84852b..193ceb2 100644
--- a/include/hw/isa/isa.h
+++ b/include/hw/isa/isa.h
@@ -34,6 +34,41 @@ static inline uint16_t applesmc_port(void)
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)
+
+typedef struct IsaDma {
+ Object parent;
+} IsaDma;
+
+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 @@ struct ISABus {
MemoryRegion *address_space;
MemoryRegion *address_space_io;
qemu_irq *irqs;
+ IsaDma *dma[2];
};
struct ISADevice {
@@ -63,6 +99,8 @@ ISABus *isa_bus_new(DeviceState *dev, MemoryRegion
*address_space,
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);
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index 78fe6e8..6ed91b4 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -33,6 +33,7 @@ typedef struct I2CBus I2CBus;
typedef struct I2SCodec I2SCodec;
typedef struct ISABus ISABus;
typedef struct ISADevice ISADevice;
+typedef struct IsaDma IsaDma;
typedef struct LoadStateEntry LoadStateEntry;
typedef struct MACAddr MACAddr;
typedef struct MachineClass MachineClass;
--
2.1.4
- [Qemu-devel] [PATCH 00/17] ISA DMA controllers cleanup (i8257, i82374), Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 08/17] isa: add an ISA DMA interface, and store it within the ISA bus,
Hervé Poussineau <=
- [Qemu-devel] [PATCH 06/17] i8257: add missing const, Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 14/17] cs4231a: use IsaDma interface instead of global DMA_* functions, Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 15/17] gus: use IsaDma interface instead of global DMA_* functions, Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 04/17] i8257: rename functions to start with i8257_ prefix, Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 16/17] sb16: use IsaDma interface instead of global DMA_* functions, Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 05/17] i8257: make the DMA running method per controller, Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 03/17] i8257: rename struct dma_cont to I8257State, Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 02/17] i8257: pass ISA bus to DMA_init() function, Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 09/17] i8257: implement the IsaDma interface, Hervé Poussineau, 2015/12/29
- [Qemu-devel] [PATCH 10/17] magnum: disable floppy DMA for now, Hervé Poussineau, 2015/12/29