Re: [PATCH v7 0/6] g_NCR5380: PDMA fixes and cleanup

Ondrej Zary
2017-07-04T20:54:40Z

On Monday 03 July 2017 09:59:05 Finn Thain wrote:
> Ondrej, would you please test this new series?
>
> Changed since v1:
> - PDMA transfer residual is calculated earlier.
> - End of DMA flag check is now polled (if there is any residual).
>
> Changed since v2:
> - Bail out of transfer loops when Gated IRQ gets asserted.
> - Make udelay conditional on board type.
> - Drop sg_tablesize patch due to performance regression.
>
> Changed since v3:
> - Add Ondrej's workaround for corrupt WRITE commands on DTC boards.
> - Reset the 53c400 logic after any short PDMA transfer.
> - Don't fail the transfer if the 53c400 logic got a reset.
>
> Changed since v4:
> - Bail out of transfer loops when Gated IRQ gets asserted. (Again.)
> - Always call wait_for_53c80_registers() at end of transfer.
> - Drain chip buffers after PDMA receive is interrupted.
> - Rework residual calculation.
> - Add new patch to correct DMA terminology.
>
> Changed since v5:
> - Rework residual calculation to account for on-chip buffer swap.
> - Attempt to retain the disconnect/IRQ detection in the DTC436 workaround.
> - Move all DTC436 workarounds to final patch.
>
> Changed since v6:
> - Fix residual calculation for the buffer timeout case.
> - Iterate after sending final 128 bytes to check for buffer timeout.
> - Don't log the residual value when it is known to be zero.
>
>
> Finn Thain (2):
> g_NCR5380: Cleanup comments and whitespace
> g_NCR5380: Use unambiguous terminology for PDMA send and receive
>
> Ondrej Zary (4):
> g_NCR5380: Fix PDMA transfer size
> g_NCR5380: End PDMA transfer correctly on target disconnection
> g_NCR5380: Re-work PDMA loops
> g_NCR5380: Two DTC436 PDMA workarounds
>
> drivers/scsi/g_NCR5380.c | 277
> ++++++++++++++++++++++++++--------------------- 1 file changed, 155
> insertions(+), 122 deletions(-)

Everything works fine! No corruption, no hangs, rescan-scsi-bus works.

Tested cards:
Canon FG2-5202 (53C400 chip, MMIO)
DTC-3181L (DTCT-436P chip, PIO)
HP C2502 (53C400A chip, PIO)

Tested devices:
QUANTUM LP240S GM240S01X 4.6
IBM DORS-32160 WA0A
SONY CD-ROM CDU-415 1.1g
SONY CD-ROM CDU-55S 1.0t

Tested-by: Ondrej Zary <linux@rainbow-software.org>

--
Ondrej Zary