kernel/drivers/scsi/atari_scsi.c, branch linux-5.1.y

nvram: Replace nvram_* function exports with static functions

2019-01-22T09:21:43Z

Replace nvram_* functions with static functions in nvram.h. These will become wrappers for struct nvram_ops method calls. This patch effectively disables existing NVRAM functionality so as to allow the rest of the series to be bisected without build failures. That functionality is gradually re-implemented in subsequent patches. Replace the sole validate-checksum-and-read-byte sequence with a call to nvram_read() which will gain the same semantics in subsequent patches. Remove unused exports. Acked-by: Geert Uytterhoeven Signed-off-by: Finn Thain Signed-off-by: Greg Kroah-Hartman

scsi/atari_scsi: Don't select CONFIG_NVRAM

2019-01-22T09:21:43Z

On powerpc, setting CONFIG_NVRAM=n builds a kernel with no NVRAM support. Setting CONFIG_NVRAM=m enables the /dev/nvram misc device module without enabling NVRAM support in drivers. Setting CONFIG_NVRAM=y enables the misc device (built-in) and also enables NVRAM support in drivers. m68k shares the valkyriefb driver with powerpc, and since that driver uses NVRAM, it is affected by CONFIG_ATARI_SCSI, because of the use of "select NVRAM". We can avoid the "select" here, but drivers still have to interpret the CONFIG_NVRAM symbol consistently regardless of platform. In this patch and the subsequent fbdev driver patch, the convention is adopted across all relevant platforms whereby NVRAM functionality gets enabled in a given device driver when the nvram misc device is built-in or when both drivers are modules. Acked-by: Michael Schmitz Signed-off-by: Finn Thain Signed-off-by: Greg Kroah-Hartman

scsi: remove the use_clustering flag

2018-12-19T04:19:21Z

The same effects can be achieved by setting the dma_boundary to PAGE_SIZE - 1 and the max_segment_size to PAGE_SIZE, so shift those settings into the drivers. Note that in many cases the setting might be bogus, but this keeps the status quo. [mkp: fix myrs and myrb] Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen

scsi: NCR5380: Move bus reset to host reset

2017-08-25T21:21:11Z

The bus reset handler really is a host reset, so move it to eh_bus_reset_handler. Signed-off-by: Hannes Reinecke Acked-by: Finn Thain Reviewed-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Signed-off-by: Martin K. Petersen

scsi: atari_scsi: Use m68k_realnum_memory for FastRAM test

2017-06-13T00:48:08Z

m68k_num_memory is unsuitable to test for the presence of FastRAM on CT60 if the kernel is located in FastRAM: in arch/m68k/mm/motorola.c the ST-RAM chunk is skipped and m68k_num_memory is decremented in this case. m68k_realnum_memory still contains the actual number of RAM chunks so use that. Signed-off-by: Michael Schmitz Tested-by: Christian T. Steigies Signed-off-by: Martin K. Petersen

scsi: atari_scsi: Reset DMA during bus reset only under ST-DMA lock

2017-02-01T02:39:22Z

The atari_scsi driver should not access Falcon DMA chip registers unless it has acquired exclusive access to that chip. If the driver doesn't have exclusive access then there's no need for a DMA reset as there are no scsi commands in progress. Signed-off-by: Finn Thain Tested-by: Ondrej Zary Tested-by: Michael Schmitz Signed-off-by: Martin K. Petersen

scsi: ncr5380: Resolve various static checker warnings

2017-02-01T02:38:35Z

Avoid various warnings from "make C=1" by annotating a couple of unlock-then-lock sequences, replacing a zero with NULL and correcting some type casts. Also avoid a warning from "make W=1" by adding braces. Signed-off-by: Finn Thain Tested-by: Ondrej Zary Tested-by: Michael Schmitz Signed-off-by: Martin K. Petersen

scsi: ncr5380: Clean up dead code and redundant macro usage

2017-02-01T02:37:44Z

Remove dead code inside #if 0 conditionals. Remove the #ifdef __KERNEL__ test, since NCR5380.h has no definitions that relate to userspace code. Remove two redundant macro definitions which were overlooked in commit e9db3198e08b ("sun3_scsi: Adopt NCR5380.c core driver"). Signed-off-by: Finn Thain Tested-by: Ondrej Zary Tested-by: Michael Schmitz Signed-off-by: Martin K. Petersen

scsi: ncr5380: Use correct types for DMA routines

2016-11-08T22:29:48Z

Apply prototypes to get consistent function signatures for the DMA functions implemented in the board-specific drivers. To avoid using macros to alter actual parameters, some of those functions are reworked slightly. This is a step toward the goal of passing the board-specific routines to the core driver using an ops struct (as in a platform driver or library module). This also helps fix some inconsistent types: where the core driver uses ints (cmd->SCp.this_residual and hostdata->dma_len) for keeping track of transfers, certain board-specific routines used unsigned long. While we are fixing these function signatures, pass the hostdata pointer to DMA routines instead of a Scsi_Host pointer, for shorter and faster code. Signed-off-by: Finn Thain Reviewed-by: Hannes Reinecke Tested-by: Ondrej Zary Tested-by: Michael Schmitz Acked-by: Russell King Signed-off-by: Martin K. Petersen

scsi: ncr5380: Expedite register polling

2016-11-08T22:29:48Z

Avoid the call to NCR5380_poll_politely2() when possible. The call is easily short-circuited on the PIO fast path, using the inline wrapper. This requires that the NCR5380_read macro be made available before any #include "NCR5380.h" so a few declarations have to be moved too. Signed-off-by: Finn Thain Reviewed-by: Hannes Reinecke Tested-by: Ondrej Zary Tested-by: Michael Schmitz Signed-off-by: Martin K. Petersen