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qemu/hw/dma
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Frank Chang ae000c5f65 hw/dma: sifive_pdma: don't set Control.error if 0 bytes to transfer 
Real PDMA doesn't set Control.error if there are 0 bytes to be
transferred. The DMA transfer is still success.

The following result is PDMA tested in U-Boot on Unmatched board:

=> mw.l 0x3000000 0x0                      <= Disclaim channel 0
=> mw.l 0x3000000 0x1                      <= Claim channel 0
=> mw.l 0x3000004 0x55000000               <= wsize = rsize = 5 (2^5 = 32 bytes)
=> mw.q 0x3000008 0x0                      <= NextBytes = 0
=> mw.q 0x3000010 0x84000000               <= NextDestination = 0x84000000
=> mw.q 0x3000018 0x84001000               <= NextSource = 0x84001000
=> mw.l 0x84000000 0x87654321              <= Fill test data to dst
=> mw.l 0x84001000 0x12345678              <= Fill test data to src
=> md.l 0x84000000 1; md.l 0x84001000 1    <= Dump src/dst memory contents
84000000: 87654321                               !Ce.
84001000: 12345678                               xV4.
=> md.l 0x3000000 8                        <= Dump PDMA status
03000000: 00000001 55000000 00000000 00000000    .......U........
03000010: 84000000 00000000 84001000 00000000    ................
=> mw.l 0x3000000 0x3                      <= Set channel 0 run and claim bits
=> md.l 0x3000000 8                        <= Dump PDMA status
03000000: 40000001 55000000 00000000 00000000    ...@...U........
03000010: 84000000 00000000 84001000 00000000    ................
=> md.l 0x84000000 1; md.l 0x84001000 1    <= Dump src/dst memory contents
84000000: 87654321                               !Ce.
84001000: 12345678                               xV4.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Tested-by: Max Hsu <max.hsu@sifive.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20210912130553.179501-5-frank.chang@sifive.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2021-09-21 07:56:49 +10:00
..
bcm2835_dma.c qom: Don't handle impossible object_property_get_link() failure 2020-07-10 15:18:08 +02:00
etraxfs_dma.c Remove unnecessary cast when using the cpu_[physical]_memory API 2020-02-20 14:47:08 +01:00
i8257.c i8257: Move QOM macro to header 2020-08-27 14:04:54 -04:00
i82374.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
Kconfig hw/dma: Implement a Xilinx CSU DMA model 2021-03-08 17:20:04 +00:00
meson.build Drop the deprecated unicore32 target 2021-05-12 18:20:52 +02:00
omap_dma.c hw/dma/omap_dma: Move switch 'fall through' comment to correct place 2019-08-21 10:55:23 +02:00
pl080.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
pl330.c hw/dma/pl330: Add memory region to replace default 2021-08-25 10:48:50 +01:00
pxa2xx_dma.c hw/arm: Constify VMStateDescription 2021-05-02 17:24:50 +02:00
rc4030.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
sifive_pdma.c hw/dma: sifive_pdma: don't set Control.error if 0 bytes to transfer 2021-09-21 07:56:49 +10:00
soc_dma.c misc: Replace zero-length arrays with flexible array member (automatic) 2020-03-16 22:07:42 +01:00
sparc32_dma.c esp: rename existing ESP QOM type to SYSBUS_ESP 2021-03-07 10:39:05 +00:00
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
xilinx_axidma.c hw/dma/xilinx_axidma: Rename StreamSlave as StreamSink 2020-12-10 12:15:04 -05:00
xlnx_csu_dma.c hw/dma/xlnx_csu_dma: Always expect 'dma' link property to be set 2021-08-26 17:01:59 +01:00
xlnx_dpdma.c util/hexdump: Reorder qemu_hexdump() arguments 2020-09-11 21:25:59 +02:00
xlnx-zdma.c hw/dma/xlnx-zdma Always expect 'dma' link property to be set 2021-08-26 17:01:59 +01:00
xlnx-zynq-devcfg.c Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00