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Implement fw_cfg DMA interface

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Based on the specifications on docs/specs/fw_cfg.txt

This interface is an addon. The old interface can still be used as usual.

Based on Gerd Hoffman's initial implementation.

Signed-off-by: Marc Marí <markmb@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Marc Marí 2015-10-08 17:02:55 +02:00 • committed by Gerd Hoffmann
parent c9eae1d4b9
commit a4c0d1deb7
4 changed files with 248 additions and 16 deletions
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16
include/hw/nvram/fw_cfg.h
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@ -61,6 +61,15 @@ typedef struct FWCfgFiles {
FWCfgFile f[];
} FWCfgFiles;
/* Control as first field allows for different structures selected by this
* field, which might be useful in the future
*/
typedef struct FWCfgDmaAccess {
uint32_t control;
uint32_t length;
uint64_t address;
} QEMU_PACKED FWCfgDmaAccess;
typedef void (*FWCfgCallback)(void *opaque, uint8_t *data);
typedef void (*FWCfgReadCallback)(void *opaque, uint32_t offset);
@ -77,10 +86,13 @@ void fw_cfg_add_file_callback(FWCfgState *s, const char *filename,
void *data, size_t len);
void *fw_cfg_modify_file(FWCfgState *s, const char *filename, void *data,
size_t len);
FWCfgState *fw_cfg_init_io_dma(uint32_t iobase, uint32_t dma_iobase,
AddressSpace *dma_as);
FWCfgState *fw_cfg_init_io(uint32_t iobase);
FWCfgState *fw_cfg_init_mem(hwaddr ctl_addr, hwaddr data_addr);
FWCfgState *fw_cfg_init_mem_wide(hwaddr ctl_addr, hwaddr data_addr,
uint32_t data_width);
FWCfgState *fw_cfg_init_mem_wide(hwaddr ctl_addr,
hwaddr data_addr, uint32_t data_width,
hwaddr dma_addr, AddressSpace *dma_as);
FWCfgState *fw_cfg_find(void);